iwl3945-base.c 232.6 KB
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/******************************************************************************
 *
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 * Copyright(c) 2003 - 2008 Intel Corporation. All rights reserved.
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 *
 * Portions of this file are derived from the ipw3945 project, as well
 * as portions of the ieee80211 subsystem header files.
 *
 * This program is free software; you can redistribute it and/or modify it
 * under the terms of version 2 of the GNU General Public License as
 * published by the Free Software Foundation.
 *
 * This program is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
 * more details.
 *
 * You should have received a copy of the GNU General Public License along with
 * this program; if not, write to the Free Software Foundation, Inc.,
 * 51 Franklin Street, Fifth Floor, Boston, MA 02110, USA
 *
 * The full GNU General Public License is included in this distribution in the
 * file called LICENSE.
 *
 * Contact Information:
 * James P. Ketrenos <ipw2100-admin@linux.intel.com>
 * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
 *
 *****************************************************************************/

#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/init.h>
#include <linux/pci.h>
#include <linux/dma-mapping.h>
#include <linux/delay.h>
#include <linux/skbuff.h>
#include <linux/netdevice.h>
#include <linux/wireless.h>
#include <linux/firmware.h>
#include <linux/etherdevice.h>
#include <linux/if_arp.h>

#include <net/ieee80211_radiotap.h>
#include <net/mac80211.h>

#include <asm/div64.h>

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#include "iwl-3945-core.h"
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#include "iwl-3945.h"
#include "iwl-helpers.h"

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#ifdef CONFIG_IWL3945_DEBUG
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u32 iwl3945_debug_level;
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#endif

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static int iwl3945_tx_queue_update_write_ptr(struct iwl3945_priv *priv,
				  struct iwl3945_tx_queue *txq);
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/******************************************************************************
 *
 * module boiler plate
 *
 ******************************************************************************/

/* module parameters */
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static int iwl3945_param_disable_hw_scan; /* def: 0 = use 3945's h/w scan */
static int iwl3945_param_debug;    /* def: 0 = minimal debug log messages */
static int iwl3945_param_disable;  /* def: 0 = enable radio */
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static int iwl3945_param_antenna;  /* def: 0 = both antennas (use diversity) */
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int iwl3945_param_hwcrypto;        /* def: 0 = use software encryption */
static int iwl3945_param_qos_enable = 1; /* def: 1 = use quality of service */
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int iwl3945_param_queues_num = IWL39_MAX_NUM_QUEUES; /* def: 8 Tx queues */
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/*
 * module name, copyright, version, etc.
 * NOTE: DRV_NAME is defined in iwlwifi.h for use by iwl-debug.h and printk
 */

#define DRV_DESCRIPTION	\
"Intel(R) PRO/Wireless 3945ABG/BG Network Connection driver for Linux"

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#ifdef CONFIG_IWL3945_DEBUG
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#define VD "d"
#else
#define VD
#endif

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#ifdef CONFIG_IWL3945_SPECTRUM_MEASUREMENT
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#define VS "s"
#else
#define VS
#endif

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#define IWLWIFI_VERSION "1.2.26k" VD VS
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#define DRV_COPYRIGHT	"Copyright(c) 2003-2008 Intel Corporation"
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#define DRV_VERSION     IWLWIFI_VERSION


MODULE_DESCRIPTION(DRV_DESCRIPTION);
MODULE_VERSION(DRV_VERSION);
MODULE_AUTHOR(DRV_COPYRIGHT);
MODULE_LICENSE("GPL");

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static const struct ieee80211_supported_band *iwl3945_get_band(
		struct iwl3945_priv *priv, enum ieee80211_band band)
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{
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	return priv->hw->wiphy->bands[band];
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}

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static int iwl3945_is_empty_essid(const char *essid, int essid_len)
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{
	/* Single white space is for Linksys APs */
	if (essid_len == 1 && essid[0] == ' ')
		return 1;

	/* Otherwise, if the entire essid is 0, we assume it is hidden */
	while (essid_len) {
		essid_len--;
		if (essid[essid_len] != '\0')
			return 0;
	}

	return 1;
}

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static const char *iwl3945_escape_essid(const char *essid, u8 essid_len)
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{
	static char escaped[IW_ESSID_MAX_SIZE * 2 + 1];
	const char *s = essid;
	char *d = escaped;

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	if (iwl3945_is_empty_essid(essid, essid_len)) {
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		memcpy(escaped, "<hidden>", sizeof("<hidden>"));
		return escaped;
	}

	essid_len = min(essid_len, (u8) IW_ESSID_MAX_SIZE);
	while (essid_len--) {
		if (*s == '\0') {
			*d++ = '\\';
			*d++ = '0';
			s++;
		} else
			*d++ = *s++;
	}
	*d = '\0';
	return escaped;
}

/*************** DMA-QUEUE-GENERAL-FUNCTIONS  *****
 * DMA services
 *
 * Theory of operation
 *
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 * A Tx or Rx queue resides in host DRAM, and is comprised of a circular buffer
 * of buffer descriptors, each of which points to one or more data buffers for
 * the device to read from or fill.  Driver and device exchange status of each
 * queue via "read" and "write" pointers.  Driver keeps minimum of 2 empty
 * entries in each circular buffer, to protect against confusing empty and full
 * queue states.
 *
 * The device reads or writes the data in the queues via the device's several
 * DMA/FIFO channels.  Each queue is mapped to a single DMA channel.
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 *
 * For Tx queue, there are low mark and high mark limits. If, after queuing
 * the packet for Tx, free space become < low mark, Tx queue stopped. When
 * reclaiming packets (on 'tx done IRQ), if free space become > high mark,
 * Tx queue resumed.
 *
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 * The 3945 operates with six queues:  One receive queue, one transmit queue
 * (#4) for sending commands to the device firmware, and four transmit queues
 * (#0-3) for data tx via EDCA.  An additional 2 HCCA queues are unused.
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 ***************************************************/

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int iwl3945_queue_space(const struct iwl3945_queue *q)
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{
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	int s = q->read_ptr - q->write_ptr;
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	if (q->read_ptr > q->write_ptr)
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		s -= q->n_bd;

	if (s <= 0)
		s += q->n_window;
	/* keep some reserve to not confuse empty and full situations */
	s -= 2;
	if (s < 0)
		s = 0;
	return s;
}

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int iwl3945_x2_queue_used(const struct iwl3945_queue *q, int i)
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{
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	return q->write_ptr > q->read_ptr ?
		(i >= q->read_ptr && i < q->write_ptr) :
		!(i < q->read_ptr && i >= q->write_ptr);
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}

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static inline u8 get_cmd_index(struct iwl3945_queue *q, u32 index, int is_huge)
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{
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	/* This is for scan command, the big buffer at end of command array */
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	if (is_huge)
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		return q->n_window;	/* must be power of 2 */
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	/* Otherwise, use normal size buffers */
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	return index & (q->n_window - 1);
}

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/**
 * iwl3945_queue_init - Initialize queue's high/low-water and read/write indexes
 */
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static int iwl3945_queue_init(struct iwl3945_priv *priv, struct iwl3945_queue *q,
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			  int count, int slots_num, u32 id)
{
	q->n_bd = count;
	q->n_window = slots_num;
	q->id = id;

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	/* count must be power-of-two size, otherwise iwl_queue_inc_wrap
	 * and iwl_queue_dec_wrap are broken. */
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	BUG_ON(!is_power_of_2(count));

	/* slots_num must be power-of-two size, otherwise
	 * get_cmd_index is broken. */
	BUG_ON(!is_power_of_2(slots_num));

	q->low_mark = q->n_window / 4;
	if (q->low_mark < 4)
		q->low_mark = 4;

	q->high_mark = q->n_window / 8;
	if (q->high_mark < 2)
		q->high_mark = 2;

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	q->write_ptr = q->read_ptr = 0;
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	return 0;
}

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/**
 * iwl3945_tx_queue_alloc - Alloc driver data and TFD CB for one Tx/cmd queue
 */
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static int iwl3945_tx_queue_alloc(struct iwl3945_priv *priv,
			      struct iwl3945_tx_queue *txq, u32 id)
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{
	struct pci_dev *dev = priv->pci_dev;

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	/* Driver private data, only for Tx (not command) queues,
	 * not shared with device. */
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	if (id != IWL_CMD_QUEUE_NUM) {
		txq->txb = kmalloc(sizeof(txq->txb[0]) *
				   TFD_QUEUE_SIZE_MAX, GFP_KERNEL);
		if (!txq->txb) {
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			IWL_ERROR("kmalloc for auxiliary BD "
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				  "structures failed\n");
			goto error;
		}
	} else
		txq->txb = NULL;

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	/* Circular buffer of transmit frame descriptors (TFDs),
	 * shared with device */
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	txq->bd = pci_alloc_consistent(dev,
			sizeof(txq->bd[0]) * TFD_QUEUE_SIZE_MAX,
			&txq->q.dma_addr);

	if (!txq->bd) {
		IWL_ERROR("pci_alloc_consistent(%zd) failed\n",
			  sizeof(txq->bd[0]) * TFD_QUEUE_SIZE_MAX);
		goto error;
	}
	txq->q.id = id;

	return 0;

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	kfree(txq->txb);
	txq->txb = NULL;
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	return -ENOMEM;
}

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/**
 * iwl3945_tx_queue_init - Allocate and initialize one tx/cmd queue
 */
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int iwl3945_tx_queue_init(struct iwl3945_priv *priv,
		      struct iwl3945_tx_queue *txq, int slots_num, u32 txq_id)
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{
	struct pci_dev *dev = priv->pci_dev;
	int len;
	int rc = 0;

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	/*
	 * Alloc buffer array for commands (Tx or other types of commands).
	 * For the command queue (#4), allocate command space + one big
	 * command for scan, since scan command is very huge; the system will
	 * not have two scans at the same time, so only one is needed.
	 * For data Tx queues (all other queues), no super-size command
	 * space is needed.
	 */
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	len = sizeof(struct iwl3945_cmd) * slots_num;
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	if (txq_id == IWL_CMD_QUEUE_NUM)
		len +=  IWL_MAX_SCAN_SIZE;
	txq->cmd = pci_alloc_consistent(dev, len, &txq->dma_addr_cmd);
	if (!txq->cmd)
		return -ENOMEM;

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	/* Alloc driver data array and TFD circular buffer */
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	rc = iwl3945_tx_queue_alloc(priv, txq, txq_id);
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	if (rc) {
		pci_free_consistent(dev, len, txq->cmd, txq->dma_addr_cmd);

		return -ENOMEM;
	}
	txq->need_update = 0;

	/* TFD_QUEUE_SIZE_MAX must be power-of-two size, otherwise
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	 * iwl_queue_inc_wrap and iwl_queue_dec_wrap are broken. */
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	BUILD_BUG_ON(TFD_QUEUE_SIZE_MAX & (TFD_QUEUE_SIZE_MAX - 1));
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	/* Initialize queue high/low-water, head/tail indexes */
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	iwl3945_queue_init(priv, &txq->q, TFD_QUEUE_SIZE_MAX, slots_num, txq_id);
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	/* Tell device where to find queue, enable DMA channel. */
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	iwl3945_hw_tx_queue_init(priv, txq);
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	return 0;
}

/**
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 * iwl3945_tx_queue_free - Deallocate DMA queue.
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 * @txq: Transmit queue to deallocate.
 *
 * Empty queue by removing and destroying all BD's.
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 * Free all buffers.
 * 0-fill, but do not free "txq" descriptor structure.
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 */
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void iwl3945_tx_queue_free(struct iwl3945_priv *priv, struct iwl3945_tx_queue *txq)
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{
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	struct iwl3945_queue *q = &txq->q;
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	struct pci_dev *dev = priv->pci_dev;
	int len;

	if (q->n_bd == 0)
		return;

	/* first, empty all BD's */
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	for (; q->write_ptr != q->read_ptr;
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	     q->read_ptr = iwl_queue_inc_wrap(q->read_ptr, q->n_bd))
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		iwl3945_hw_txq_free_tfd(priv, txq);
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	len = sizeof(struct iwl3945_cmd) * q->n_window;
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	if (q->id == IWL_CMD_QUEUE_NUM)
		len += IWL_MAX_SCAN_SIZE;

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	/* De-alloc array of command/tx buffers */
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	pci_free_consistent(dev, len, txq->cmd, txq->dma_addr_cmd);

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	/* De-alloc circular buffer of TFDs */
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	if (txq->q.n_bd)
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		pci_free_consistent(dev, sizeof(struct iwl3945_tfd_frame) *
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				    txq->q.n_bd, txq->bd, txq->q.dma_addr);

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	/* De-alloc array of per-TFD driver data */
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	kfree(txq->txb);
	txq->txb = NULL;
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	/* 0-fill queue descriptor structure */
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	memset(txq, 0, sizeof(*txq));
}

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const u8 iwl3945_broadcast_addr[ETH_ALEN] = { 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF };
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/*************** STATION TABLE MANAGEMENT ****
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 * mac80211 should be examined to determine if sta_info is duplicating
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 * the functionality provided here
 */

/**************************************************************/
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#if 0 /* temporary disable till we add real remove station */
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/**
 * iwl3945_remove_station - Remove driver's knowledge of station.
 *
 * NOTE:  This does not remove station from device's station table.
 */
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static u8 iwl3945_remove_station(struct iwl3945_priv *priv, const u8 *addr, int is_ap)
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{
	int index = IWL_INVALID_STATION;
	int i;
	unsigned long flags;

	spin_lock_irqsave(&priv->sta_lock, flags);

	if (is_ap)
		index = IWL_AP_ID;
	else if (is_broadcast_ether_addr(addr))
		index = priv->hw_setting.bcast_sta_id;
	else
		for (i = IWL_STA_ID; i < priv->hw_setting.max_stations; i++)
			if (priv->stations[i].used &&
			    !compare_ether_addr(priv->stations[i].sta.sta.addr,
						addr)) {
				index = i;
				break;
			}

	if (unlikely(index == IWL_INVALID_STATION))
		goto out;

	if (priv->stations[index].used) {
		priv->stations[index].used = 0;
		priv->num_stations--;
	}

	BUG_ON(priv->num_stations < 0);

out:
	spin_unlock_irqrestore(&priv->sta_lock, flags);
	return 0;
}
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#endif
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/**
 * iwl3945_clear_stations_table - Clear the driver's station table
 *
 * NOTE:  This does not clear or otherwise alter the device's station table.
 */
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static void iwl3945_clear_stations_table(struct iwl3945_priv *priv)
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{
	unsigned long flags;

	spin_lock_irqsave(&priv->sta_lock, flags);

	priv->num_stations = 0;
	memset(priv->stations, 0, sizeof(priv->stations));

	spin_unlock_irqrestore(&priv->sta_lock, flags);
}

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/**
 * iwl3945_add_station - Add station to station tables in driver and device
 */
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u8 iwl3945_add_station(struct iwl3945_priv *priv, const u8 *addr, int is_ap, u8 flags)
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{
	int i;
	int index = IWL_INVALID_STATION;
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	struct iwl3945_station_entry *station;
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	unsigned long flags_spin;
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	DECLARE_MAC_BUF(mac);
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	u8 rate;
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	spin_lock_irqsave(&priv->sta_lock, flags_spin);
	if (is_ap)
		index = IWL_AP_ID;
	else if (is_broadcast_ether_addr(addr))
		index = priv->hw_setting.bcast_sta_id;
	else
		for (i = IWL_STA_ID; i < priv->hw_setting.max_stations; i++) {
			if (!compare_ether_addr(priv->stations[i].sta.sta.addr,
						addr)) {
				index = i;
				break;
			}

			if (!priv->stations[i].used &&
			    index == IWL_INVALID_STATION)
				index = i;
		}

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	/* These two conditions has the same outcome but keep them separate
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	  since they have different meaning */
	if (unlikely(index == IWL_INVALID_STATION)) {
		spin_unlock_irqrestore(&priv->sta_lock, flags_spin);
		return index;
	}

	if (priv->stations[index].used &&
	   !compare_ether_addr(priv->stations[index].sta.sta.addr, addr)) {
		spin_unlock_irqrestore(&priv->sta_lock, flags_spin);
		return index;
	}

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	IWL_DEBUG_ASSOC("Add STA ID %d: %s\n", index, print_mac(mac, addr));
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	station = &priv->stations[index];
	station->used = 1;
	priv->num_stations++;

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	/* Set up the REPLY_ADD_STA command to send to device */
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	memset(&station->sta, 0, sizeof(struct iwl3945_addsta_cmd));
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	memcpy(station->sta.sta.addr, addr, ETH_ALEN);
	station->sta.mode = 0;
	station->sta.sta.sta_id = index;
	station->sta.station_flags = 0;

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	if (priv->band == IEEE80211_BAND_5GHZ)
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		rate = IWL_RATE_6M_PLCP;
	else
		rate =	IWL_RATE_1M_PLCP;
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	/* Turn on both antennas for the station... */
	station->sta.rate_n_flags =
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			iwl3945_hw_set_rate_n_flags(rate, RATE_MCS_ANT_AB_MSK);
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	station->current_rate.rate_n_flags =
			le16_to_cpu(station->sta.rate_n_flags);

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	spin_unlock_irqrestore(&priv->sta_lock, flags_spin);
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	/* Add station to device's station table */
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	iwl3945_send_add_station(priv, &station->sta, flags);
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	return index;

}

/*************** DRIVER STATUS FUNCTIONS   *****/

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static inline int iwl3945_is_ready(struct iwl3945_priv *priv)
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{
	/* The adapter is 'ready' if READY and GEO_CONFIGURED bits are
	 * set but EXIT_PENDING is not */
	return test_bit(STATUS_READY, &priv->status) &&
	       test_bit(STATUS_GEO_CONFIGURED, &priv->status) &&
	       !test_bit(STATUS_EXIT_PENDING, &priv->status);
}

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static inline int iwl3945_is_alive(struct iwl3945_priv *priv)
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{
	return test_bit(STATUS_ALIVE, &priv->status);
}

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static inline int iwl3945_is_init(struct iwl3945_priv *priv)
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{
	return test_bit(STATUS_INIT, &priv->status);
}

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static inline int iwl3945_is_rfkill_sw(struct iwl3945_priv *priv)
{
	return test_bit(STATUS_RF_KILL_SW, &priv->status);
}

static inline int iwl3945_is_rfkill_hw(struct iwl3945_priv *priv)
{
	return test_bit(STATUS_RF_KILL_HW, &priv->status);
}

C
Christoph Hellwig 已提交
545
static inline int iwl3945_is_rfkill(struct iwl3945_priv *priv)
Z
Zhu Yi 已提交
546
{
547 548
	return iwl3945_is_rfkill_hw(priv) ||
		iwl3945_is_rfkill_sw(priv);
Z
Zhu Yi 已提交
549 550
}

C
Christoph Hellwig 已提交
551
static inline int iwl3945_is_ready_rf(struct iwl3945_priv *priv)
Z
Zhu Yi 已提交
552 553
{

C
Christoph Hellwig 已提交
554
	if (iwl3945_is_rfkill(priv))
Z
Zhu Yi 已提交
555 556
		return 0;

C
Christoph Hellwig 已提交
557
	return iwl3945_is_ready(priv);
Z
Zhu Yi 已提交
558 559 560 561 562 563 564 565 566 567 568 569 570 571 572 573 574 575 576 577 578 579 580 581 582 583 584 585 586 587 588 589 590 591 592 593 594 595 596 597 598 599 600 601 602 603 604 605 606 607 608 609 610 611 612 613 614 615
}

/*************** HOST COMMAND QUEUE FUNCTIONS   *****/

#define IWL_CMD(x) case x : return #x

static const char *get_cmd_string(u8 cmd)
{
	switch (cmd) {
		IWL_CMD(REPLY_ALIVE);
		IWL_CMD(REPLY_ERROR);
		IWL_CMD(REPLY_RXON);
		IWL_CMD(REPLY_RXON_ASSOC);
		IWL_CMD(REPLY_QOS_PARAM);
		IWL_CMD(REPLY_RXON_TIMING);
		IWL_CMD(REPLY_ADD_STA);
		IWL_CMD(REPLY_REMOVE_STA);
		IWL_CMD(REPLY_REMOVE_ALL_STA);
		IWL_CMD(REPLY_3945_RX);
		IWL_CMD(REPLY_TX);
		IWL_CMD(REPLY_RATE_SCALE);
		IWL_CMD(REPLY_LEDS_CMD);
		IWL_CMD(REPLY_TX_LINK_QUALITY_CMD);
		IWL_CMD(RADAR_NOTIFICATION);
		IWL_CMD(REPLY_QUIET_CMD);
		IWL_CMD(REPLY_CHANNEL_SWITCH);
		IWL_CMD(CHANNEL_SWITCH_NOTIFICATION);
		IWL_CMD(REPLY_SPECTRUM_MEASUREMENT_CMD);
		IWL_CMD(SPECTRUM_MEASURE_NOTIFICATION);
		IWL_CMD(POWER_TABLE_CMD);
		IWL_CMD(PM_SLEEP_NOTIFICATION);
		IWL_CMD(PM_DEBUG_STATISTIC_NOTIFIC);
		IWL_CMD(REPLY_SCAN_CMD);
		IWL_CMD(REPLY_SCAN_ABORT_CMD);
		IWL_CMD(SCAN_START_NOTIFICATION);
		IWL_CMD(SCAN_RESULTS_NOTIFICATION);
		IWL_CMD(SCAN_COMPLETE_NOTIFICATION);
		IWL_CMD(BEACON_NOTIFICATION);
		IWL_CMD(REPLY_TX_BEACON);
		IWL_CMD(WHO_IS_AWAKE_NOTIFICATION);
		IWL_CMD(QUIET_NOTIFICATION);
		IWL_CMD(REPLY_TX_PWR_TABLE_CMD);
		IWL_CMD(MEASURE_ABORT_NOTIFICATION);
		IWL_CMD(REPLY_BT_CONFIG);
		IWL_CMD(REPLY_STATISTICS_CMD);
		IWL_CMD(STATISTICS_NOTIFICATION);
		IWL_CMD(REPLY_CARD_STATE_CMD);
		IWL_CMD(CARD_STATE_NOTIFICATION);
		IWL_CMD(MISSED_BEACONS_NOTIFICATION);
	default:
		return "UNKNOWN";

	}
}

#define HOST_COMPLETE_TIMEOUT (HZ / 2)

/**
C
Christoph Hellwig 已提交
616
 * iwl3945_enqueue_hcmd - enqueue a uCode command
Z
Zhu Yi 已提交
617 618 619 620 621 622 623
 * @priv: device private data point
 * @cmd: a point to the ucode command structure
 *
 * The function returns < 0 values to indicate the operation is
 * failed. On success, it turns the index (> 0) of command in the
 * command queue.
 */
C
Christoph Hellwig 已提交
624
static int iwl3945_enqueue_hcmd(struct iwl3945_priv *priv, struct iwl3945_host_cmd *cmd)
Z
Zhu Yi 已提交
625
{
C
Christoph Hellwig 已提交
626 627 628
	struct iwl3945_tx_queue *txq = &priv->txq[IWL_CMD_QUEUE_NUM];
	struct iwl3945_queue *q = &txq->q;
	struct iwl3945_tfd_frame *tfd;
Z
Zhu Yi 已提交
629
	u32 *control_flags;
C
Christoph Hellwig 已提交
630
	struct iwl3945_cmd *out_cmd;
Z
Zhu Yi 已提交
631 632 633 634 635 636 637 638 639 640 641 642 643 644
	u32 idx;
	u16 fix_size = (u16)(cmd->len + sizeof(out_cmd->hdr));
	dma_addr_t phys_addr;
	int pad;
	u16 count;
	int ret;
	unsigned long flags;

	/* If any of the command structures end up being larger than
	 * the TFD_MAX_PAYLOAD_SIZE, and it sent as a 'small' command then
	 * we will need to increase the size of the TFD entries */
	BUG_ON((fix_size > TFD_MAX_PAYLOAD_SIZE) &&
	       !(cmd->meta.flags & CMD_SIZE_HUGE));

645 646 647 648 649 650

	if (iwl3945_is_rfkill(priv)) {
		IWL_DEBUG_INFO("Not sending command - RF KILL");
		return -EIO;
	}

C
Christoph Hellwig 已提交
651
	if (iwl3945_queue_space(q) < ((cmd->meta.flags & CMD_ASYNC) ? 2 : 1)) {
Z
Zhu Yi 已提交
652 653 654 655 656 657
		IWL_ERROR("No space for Tx\n");
		return -ENOSPC;
	}

	spin_lock_irqsave(&priv->hcmd_lock, flags);

658
	tfd = &txq->bd[q->write_ptr];
Z
Zhu Yi 已提交
659 660 661 662
	memset(tfd, 0, sizeof(*tfd));

	control_flags = (u32 *) tfd;

663
	idx = get_cmd_index(q, q->write_ptr, cmd->meta.flags & CMD_SIZE_HUGE);
Z
Zhu Yi 已提交
664 665 666 667 668 669 670 671 672 673 674
	out_cmd = &txq->cmd[idx];

	out_cmd->hdr.cmd = cmd->id;
	memcpy(&out_cmd->meta, &cmd->meta, sizeof(cmd->meta));
	memcpy(&out_cmd->cmd.payload, cmd->data, cmd->len);

	/* At this point, the out_cmd now has all of the incoming cmd
	 * information */

	out_cmd->hdr.flags = 0;
	out_cmd->hdr.sequence = cpu_to_le16(QUEUE_TO_SEQ(IWL_CMD_QUEUE_NUM) |
675
			INDEX_TO_SEQ(q->write_ptr));
Z
Zhu Yi 已提交
676 677 678 679
	if (out_cmd->meta.flags & CMD_SIZE_HUGE)
		out_cmd->hdr.sequence |= cpu_to_le16(SEQ_HUGE_FRAME);

	phys_addr = txq->dma_addr_cmd + sizeof(txq->cmd[0]) * idx +
C
Christoph Hellwig 已提交
680 681
			offsetof(struct iwl3945_cmd, hdr);
	iwl3945_hw_txq_attach_buf_to_tfd(priv, tfd, phys_addr, fix_size);
Z
Zhu Yi 已提交
682 683 684 685 686 687 688 689 690

	pad = U32_PAD(cmd->len);
	count = TFD_CTL_COUNT_GET(*control_flags);
	*control_flags = TFD_CTL_COUNT_SET(count) | TFD_CTL_PAD_SET(pad);

	IWL_DEBUG_HC("Sending command %s (#%x), seq: 0x%04X, "
		     "%d bytes at %d[%d]:%d\n",
		     get_cmd_string(out_cmd->hdr.cmd),
		     out_cmd->hdr.cmd, le16_to_cpu(out_cmd->hdr.sequence),
691
		     fix_size, q->write_ptr, idx, IWL_CMD_QUEUE_NUM);
Z
Zhu Yi 已提交
692 693

	txq->need_update = 1;
694 695

	/* Increment and update queue's write index */
T
Tomas Winkler 已提交
696
	q->write_ptr = iwl_queue_inc_wrap(q->write_ptr, q->n_bd);
C
Christoph Hellwig 已提交
697
	ret = iwl3945_tx_queue_update_write_ptr(priv, txq);
Z
Zhu Yi 已提交
698 699 700 701 702

	spin_unlock_irqrestore(&priv->hcmd_lock, flags);
	return ret ? ret : idx;
}

C
Christoph Hellwig 已提交
703
static int iwl3945_send_cmd_async(struct iwl3945_priv *priv, struct iwl3945_host_cmd *cmd)
Z
Zhu Yi 已提交
704 705 706 707 708 709 710 711 712 713 714 715 716 717
{
	int ret;

	BUG_ON(!(cmd->meta.flags & CMD_ASYNC));

	/* An asynchronous command can not expect an SKB to be set. */
	BUG_ON(cmd->meta.flags & CMD_WANT_SKB);

	/* An asynchronous command MUST have a callback. */
	BUG_ON(!cmd->meta.u.callback);

	if (test_bit(STATUS_EXIT_PENDING, &priv->status))
		return -EBUSY;

C
Christoph Hellwig 已提交
718
	ret = iwl3945_enqueue_hcmd(priv, cmd);
Z
Zhu Yi 已提交
719
	if (ret < 0) {
C
Christoph Hellwig 已提交
720
		IWL_ERROR("Error sending %s: iwl3945_enqueue_hcmd failed: %d\n",
Z
Zhu Yi 已提交
721 722 723 724 725 726
			  get_cmd_string(cmd->id), ret);
		return ret;
	}
	return 0;
}

C
Christoph Hellwig 已提交
727
static int iwl3945_send_cmd_sync(struct iwl3945_priv *priv, struct iwl3945_host_cmd *cmd)
Z
Zhu Yi 已提交
728 729 730 731 732 733 734 735 736
{
	int cmd_idx;
	int ret;

	BUG_ON(cmd->meta.flags & CMD_ASYNC);

	 /* A synchronous command can not have a callback set. */
	BUG_ON(cmd->meta.u.callback != NULL);

737
	if (test_and_set_bit(STATUS_HCMD_SYNC_ACTIVE, &priv->status)) {
Z
Zhu Yi 已提交
738 739
		IWL_ERROR("Error sending %s: Already sending a host command\n",
			  get_cmd_string(cmd->id));
740 741
		ret = -EBUSY;
		goto out;
Z
Zhu Yi 已提交
742 743 744 745 746 747 748
	}

	set_bit(STATUS_HCMD_ACTIVE, &priv->status);

	if (cmd->meta.flags & CMD_WANT_SKB)
		cmd->meta.source = &cmd->meta;

C
Christoph Hellwig 已提交
749
	cmd_idx = iwl3945_enqueue_hcmd(priv, cmd);
Z
Zhu Yi 已提交
750 751
	if (cmd_idx < 0) {
		ret = cmd_idx;
C
Christoph Hellwig 已提交
752
		IWL_ERROR("Error sending %s: iwl3945_enqueue_hcmd failed: %d\n",
Z
Zhu Yi 已提交
753 754 755 756 757 758 759 760 761 762 763 764 765 766 767 768 769 770 771 772 773 774 775 776 777 778 779 780 781 782 783 784 785 786 787 788 789 790 791 792 793 794 795
			  get_cmd_string(cmd->id), ret);
		goto out;
	}

	ret = wait_event_interruptible_timeout(priv->wait_command_queue,
			!test_bit(STATUS_HCMD_ACTIVE, &priv->status),
			HOST_COMPLETE_TIMEOUT);
	if (!ret) {
		if (test_bit(STATUS_HCMD_ACTIVE, &priv->status)) {
			IWL_ERROR("Error sending %s: time out after %dms.\n",
				  get_cmd_string(cmd->id),
				  jiffies_to_msecs(HOST_COMPLETE_TIMEOUT));

			clear_bit(STATUS_HCMD_ACTIVE, &priv->status);
			ret = -ETIMEDOUT;
			goto cancel;
		}
	}

	if (test_bit(STATUS_RF_KILL_HW, &priv->status)) {
		IWL_DEBUG_INFO("Command %s aborted: RF KILL Switch\n",
			       get_cmd_string(cmd->id));
		ret = -ECANCELED;
		goto fail;
	}
	if (test_bit(STATUS_FW_ERROR, &priv->status)) {
		IWL_DEBUG_INFO("Command %s failed: FW Error\n",
			       get_cmd_string(cmd->id));
		ret = -EIO;
		goto fail;
	}
	if ((cmd->meta.flags & CMD_WANT_SKB) && !cmd->meta.u.skb) {
		IWL_ERROR("Error: Response NULL in '%s'\n",
			  get_cmd_string(cmd->id));
		ret = -EIO;
		goto out;
	}

	ret = 0;
	goto out;

cancel:
	if (cmd->meta.flags & CMD_WANT_SKB) {
C
Christoph Hellwig 已提交
796
		struct iwl3945_cmd *qcmd;
Z
Zhu Yi 已提交
797 798 799 800 801 802 803 804 805 806 807 808 809 810

		/* Cancel the CMD_WANT_SKB flag for the cmd in the
		 * TX cmd queue. Otherwise in case the cmd comes
		 * in later, it will possibly set an invalid
		 * address (cmd->meta.source). */
		qcmd = &priv->txq[IWL_CMD_QUEUE_NUM].cmd[cmd_idx];
		qcmd->meta.flags &= ~CMD_WANT_SKB;
	}
fail:
	if (cmd->meta.u.skb) {
		dev_kfree_skb_any(cmd->meta.u.skb);
		cmd->meta.u.skb = NULL;
	}
out:
811
	clear_bit(STATUS_HCMD_SYNC_ACTIVE, &priv->status);
Z
Zhu Yi 已提交
812 813 814
	return ret;
}

C
Christoph Hellwig 已提交
815
int iwl3945_send_cmd(struct iwl3945_priv *priv, struct iwl3945_host_cmd *cmd)
Z
Zhu Yi 已提交
816 817
{
	if (cmd->meta.flags & CMD_ASYNC)
C
Christoph Hellwig 已提交
818
		return iwl3945_send_cmd_async(priv, cmd);
Z
Zhu Yi 已提交
819

C
Christoph Hellwig 已提交
820
	return iwl3945_send_cmd_sync(priv, cmd);
Z
Zhu Yi 已提交
821 822
}

C
Christoph Hellwig 已提交
823
int iwl3945_send_cmd_pdu(struct iwl3945_priv *priv, u8 id, u16 len, const void *data)
Z
Zhu Yi 已提交
824
{
C
Christoph Hellwig 已提交
825
	struct iwl3945_host_cmd cmd = {
Z
Zhu Yi 已提交
826 827 828 829 830
		.id = id,
		.len = len,
		.data = data,
	};

C
Christoph Hellwig 已提交
831
	return iwl3945_send_cmd_sync(priv, &cmd);
Z
Zhu Yi 已提交
832 833
}

C
Christoph Hellwig 已提交
834
static int __must_check iwl3945_send_cmd_u32(struct iwl3945_priv *priv, u8 id, u32 val)
Z
Zhu Yi 已提交
835
{
C
Christoph Hellwig 已提交
836
	struct iwl3945_host_cmd cmd = {
Z
Zhu Yi 已提交
837 838 839 840 841
		.id = id,
		.len = sizeof(val),
		.data = &val,
	};

C
Christoph Hellwig 已提交
842
	return iwl3945_send_cmd_sync(priv, &cmd);
Z
Zhu Yi 已提交
843 844
}

C
Christoph Hellwig 已提交
845
int iwl3945_send_statistics_request(struct iwl3945_priv *priv)
Z
Zhu Yi 已提交
846
{
C
Christoph Hellwig 已提交
847
	return iwl3945_send_cmd_u32(priv, REPLY_STATISTICS_CMD, 0);
Z
Zhu Yi 已提交
848 849 850
}

/**
C
Christoph Hellwig 已提交
851
 * iwl3945_set_rxon_channel - Set the phymode and channel values in staging RXON
852 853
 * @band: 2.4 or 5 GHz band
 * @channel: Any channel valid for the requested band
Z
Zhu Yi 已提交
854

855
 * In addition to setting the staging RXON, priv->band is also set.
Z
Zhu Yi 已提交
856 857
 *
 * NOTE:  Does not commit to the hardware; it sets appropriate bit fields
858
 * in the staging RXON flag structure based on the band
Z
Zhu Yi 已提交
859
 */
860 861 862
static int iwl3945_set_rxon_channel(struct iwl3945_priv *priv,
				    enum ieee80211_band band,
				    u16 channel)
Z
Zhu Yi 已提交
863
{
864
	if (!iwl3945_get_channel_info(priv, band, channel)) {
Z
Zhu Yi 已提交
865
		IWL_DEBUG_INFO("Could not set channel to %d [%d]\n",
866
			       channel, band);
Z
Zhu Yi 已提交
867 868 869 870
		return -EINVAL;
	}

	if ((le16_to_cpu(priv->staging_rxon.channel) == channel) &&
871
	    (priv->band == band))
Z
Zhu Yi 已提交
872 873 874
		return 0;

	priv->staging_rxon.channel = cpu_to_le16(channel);
875
	if (band == IEEE80211_BAND_5GHZ)
Z
Zhu Yi 已提交
876 877 878 879
		priv->staging_rxon.flags &= ~RXON_FLG_BAND_24G_MSK;
	else
		priv->staging_rxon.flags |= RXON_FLG_BAND_24G_MSK;

880
	priv->band = band;
Z
Zhu Yi 已提交
881

882
	IWL_DEBUG_INFO("Staging channel set to %d [%d]\n", channel, band);
Z
Zhu Yi 已提交
883 884 885 886 887

	return 0;
}

/**
C
Christoph Hellwig 已提交
888
 * iwl3945_check_rxon_cmd - validate RXON structure is valid
Z
Zhu Yi 已提交
889 890 891 892 893
 *
 * NOTE:  This is really only useful during development and can eventually
 * be #ifdef'd out once the driver is stable and folks aren't actively
 * making changes
 */
C
Christoph Hellwig 已提交
894
static int iwl3945_check_rxon_cmd(struct iwl3945_rxon_cmd *rxon)
Z
Zhu Yi 已提交
895 896 897 898 899 900 901 902 903 904 905 906 907 908 909 910 911 912 913 914 915 916 917 918 919 920 921 922 923 924 925 926 927 928 929 930 931 932 933 934 935 936 937 938 939 940 941 942 943 944 945 946 947 948 949 950 951 952 953 954 955 956 957 958 959
{
	int error = 0;
	int counter = 1;

	if (rxon->flags & RXON_FLG_BAND_24G_MSK) {
		error |= le32_to_cpu(rxon->flags &
				(RXON_FLG_TGJ_NARROW_BAND_MSK |
				 RXON_FLG_RADAR_DETECT_MSK));
		if (error)
			IWL_WARNING("check 24G fields %d | %d\n",
				    counter++, error);
	} else {
		error |= (rxon->flags & RXON_FLG_SHORT_SLOT_MSK) ?
				0 : le32_to_cpu(RXON_FLG_SHORT_SLOT_MSK);
		if (error)
			IWL_WARNING("check 52 fields %d | %d\n",
				    counter++, error);
		error |= le32_to_cpu(rxon->flags & RXON_FLG_CCK_MSK);
		if (error)
			IWL_WARNING("check 52 CCK %d | %d\n",
				    counter++, error);
	}
	error |= (rxon->node_addr[0] | rxon->bssid_addr[0]) & 0x1;
	if (error)
		IWL_WARNING("check mac addr %d | %d\n", counter++, error);

	/* make sure basic rates 6Mbps and 1Mbps are supported */
	error |= (((rxon->ofdm_basic_rates & IWL_RATE_6M_MASK) == 0) &&
		  ((rxon->cck_basic_rates & IWL_RATE_1M_MASK) == 0));
	if (error)
		IWL_WARNING("check basic rate %d | %d\n", counter++, error);

	error |= (le16_to_cpu(rxon->assoc_id) > 2007);
	if (error)
		IWL_WARNING("check assoc id %d | %d\n", counter++, error);

	error |= ((rxon->flags & (RXON_FLG_CCK_MSK | RXON_FLG_SHORT_SLOT_MSK))
			== (RXON_FLG_CCK_MSK | RXON_FLG_SHORT_SLOT_MSK));
	if (error)
		IWL_WARNING("check CCK and short slot %d | %d\n",
			    counter++, error);

	error |= ((rxon->flags & (RXON_FLG_CCK_MSK | RXON_FLG_AUTO_DETECT_MSK))
			== (RXON_FLG_CCK_MSK | RXON_FLG_AUTO_DETECT_MSK));
	if (error)
		IWL_WARNING("check CCK & auto detect %d | %d\n",
			    counter++, error);

	error |= ((rxon->flags & (RXON_FLG_AUTO_DETECT_MSK |
			RXON_FLG_TGG_PROTECT_MSK)) == RXON_FLG_TGG_PROTECT_MSK);
	if (error)
		IWL_WARNING("check TGG and auto detect %d | %d\n",
			    counter++, error);

	if ((rxon->flags & RXON_FLG_DIS_DIV_MSK))
		error |= ((rxon->flags & (RXON_FLG_ANT_B_MSK |
				RXON_FLG_ANT_A_MSK)) == 0);
	if (error)
		IWL_WARNING("check antenna %d %d\n", counter++, error);

	if (error)
		IWL_WARNING("Tuning to channel %d\n",
			    le16_to_cpu(rxon->channel));

	if (error) {
C
Christoph Hellwig 已提交
960
		IWL_ERROR("Not a valid iwl3945_rxon_assoc_cmd field values\n");
Z
Zhu Yi 已提交
961 962 963 964 965 966
		return -1;
	}
	return 0;
}

/**
967
 * iwl3945_full_rxon_required - check if full RXON (vs RXON_ASSOC) cmd is needed
968
 * @priv: staging_rxon is compared to active_rxon
Z
Zhu Yi 已提交
969
 *
970 971 972
 * If the RXON structure is changing enough to require a new tune,
 * or is clearing the RXON_FILTER_ASSOC_MSK, then return 1 to indicate that
 * a new tune (full RXON command, rather than RXON_ASSOC cmd) is required.
Z
Zhu Yi 已提交
973
 */
C
Christoph Hellwig 已提交
974
static int iwl3945_full_rxon_required(struct iwl3945_priv *priv)
Z
Zhu Yi 已提交
975 976 977
{

	/* These items are only settable from the full RXON command */
978
	if (!(iwl3945_is_associated(priv)) ||
Z
Zhu Yi 已提交
979 980 981 982 983 984 985 986 987 988 989 990 991 992 993 994 995 996 997 998 999 1000 1001 1002 1003 1004 1005 1006 1007 1008
	    compare_ether_addr(priv->staging_rxon.bssid_addr,
			       priv->active_rxon.bssid_addr) ||
	    compare_ether_addr(priv->staging_rxon.node_addr,
			       priv->active_rxon.node_addr) ||
	    compare_ether_addr(priv->staging_rxon.wlap_bssid_addr,
			       priv->active_rxon.wlap_bssid_addr) ||
	    (priv->staging_rxon.dev_type != priv->active_rxon.dev_type) ||
	    (priv->staging_rxon.channel != priv->active_rxon.channel) ||
	    (priv->staging_rxon.air_propagation !=
	     priv->active_rxon.air_propagation) ||
	    (priv->staging_rxon.assoc_id != priv->active_rxon.assoc_id))
		return 1;

	/* flags, filter_flags, ofdm_basic_rates, and cck_basic_rates can
	 * be updated with the RXON_ASSOC command -- however only some
	 * flag transitions are allowed using RXON_ASSOC */

	/* Check if we are not switching bands */
	if ((priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK) !=
	    (priv->active_rxon.flags & RXON_FLG_BAND_24G_MSK))
		return 1;

	/* Check if we are switching association toggle */
	if ((priv->staging_rxon.filter_flags & RXON_FILTER_ASSOC_MSK) !=
		(priv->active_rxon.filter_flags & RXON_FILTER_ASSOC_MSK))
		return 1;

	return 0;
}

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Christoph Hellwig 已提交
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static int iwl3945_send_rxon_assoc(struct iwl3945_priv *priv)
Z
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{
	int rc = 0;
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	struct iwl3945_rx_packet *res = NULL;
	struct iwl3945_rxon_assoc_cmd rxon_assoc;
	struct iwl3945_host_cmd cmd = {
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		.id = REPLY_RXON_ASSOC,
		.len = sizeof(rxon_assoc),
		.meta.flags = CMD_WANT_SKB,
		.data = &rxon_assoc,
	};
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Christoph Hellwig 已提交
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	const struct iwl3945_rxon_cmd *rxon1 = &priv->staging_rxon;
	const struct iwl3945_rxon_cmd *rxon2 = &priv->active_rxon;
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	if ((rxon1->flags == rxon2->flags) &&
	    (rxon1->filter_flags == rxon2->filter_flags) &&
	    (rxon1->cck_basic_rates == rxon2->cck_basic_rates) &&
	    (rxon1->ofdm_basic_rates == rxon2->ofdm_basic_rates)) {
		IWL_DEBUG_INFO("Using current RXON_ASSOC.  Not resending.\n");
		return 0;
	}

	rxon_assoc.flags = priv->staging_rxon.flags;
	rxon_assoc.filter_flags = priv->staging_rxon.filter_flags;
	rxon_assoc.ofdm_basic_rates = priv->staging_rxon.ofdm_basic_rates;
	rxon_assoc.cck_basic_rates = priv->staging_rxon.cck_basic_rates;
	rxon_assoc.reserved = 0;

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Christoph Hellwig 已提交
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	rc = iwl3945_send_cmd_sync(priv, &cmd);
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	if (rc)
		return rc;

C
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	res = (struct iwl3945_rx_packet *)cmd.meta.u.skb->data;
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	if (res->hdr.flags & IWL_CMD_FAILED_MSK) {
		IWL_ERROR("Bad return from REPLY_RXON_ASSOC command\n");
		rc = -EIO;
	}

	priv->alloc_rxb_skb--;
	dev_kfree_skb_any(cmd.meta.u.skb);

	return rc;
}

/**
C
Christoph Hellwig 已提交
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 * iwl3945_commit_rxon - commit staging_rxon to hardware
Z
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 *
1056
 * The RXON command in staging_rxon is committed to the hardware and
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 * the active_rxon structure is updated with the new data.  This
 * function correctly transitions out of the RXON_ASSOC_MSK state if
 * a HW tune is required based on the RXON structure changes.
 */
C
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static int iwl3945_commit_rxon(struct iwl3945_priv *priv)
Z
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{
	/* cast away the const for active_rxon in this function */
C
Christoph Hellwig 已提交
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	struct iwl3945_rxon_cmd *active_rxon = (void *)&priv->active_rxon;
Z
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	int rc = 0;
1066
	DECLARE_MAC_BUF(mac);
Z
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1067

C
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	if (!iwl3945_is_alive(priv))
Z
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		return -1;

	/* always get timestamp with Rx frame */
	priv->staging_rxon.flags |= RXON_FLG_TSF2HOST_MSK;

	/* select antenna */
	priv->staging_rxon.flags &=
	    ~(RXON_FLG_DIS_DIV_MSK | RXON_FLG_ANT_SEL_MSK);
	priv->staging_rxon.flags |= iwl3945_get_antenna_flags(priv);

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	rc = iwl3945_check_rxon_cmd(&priv->staging_rxon);
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	if (rc) {
		IWL_ERROR("Invalid RXON configuration.  Not committing.\n");
		return -EINVAL;
	}

	/* If we don't need to send a full RXON, we can use
C
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	 * iwl3945_rxon_assoc_cmd which is used to reconfigure filter
Z
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	 * and other flags for the current radio configuration. */
C
Christoph Hellwig 已提交
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	if (!iwl3945_full_rxon_required(priv)) {
		rc = iwl3945_send_rxon_assoc(priv);
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		if (rc) {
			IWL_ERROR("Error setting RXON_ASSOC "
				  "configuration (%d).\n", rc);
			return rc;
		}

		memcpy(active_rxon, &priv->staging_rxon, sizeof(*active_rxon));

		return 0;
	}

	/* If we are currently associated and the new config requires
	 * an RXON_ASSOC and the new config wants the associated mask enabled,
	 * we must clear the associated from the active configuration
	 * before we apply the new config */
C
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	if (iwl3945_is_associated(priv) &&
Z
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	    (priv->staging_rxon.filter_flags & RXON_FILTER_ASSOC_MSK)) {
		IWL_DEBUG_INFO("Toggling associated bit on current RXON\n");
		active_rxon->filter_flags &= ~RXON_FILTER_ASSOC_MSK;

C
Christoph Hellwig 已提交
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		rc = iwl3945_send_cmd_pdu(priv, REPLY_RXON,
				      sizeof(struct iwl3945_rxon_cmd),
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				      &priv->active_rxon);

		/* If the mask clearing failed then we set
		 * active_rxon back to what it was previously */
		if (rc) {
			active_rxon->filter_flags |= RXON_FILTER_ASSOC_MSK;
			IWL_ERROR("Error clearing ASSOC_MSK on current "
				  "configuration (%d).\n", rc);
			return rc;
		}
	}

	IWL_DEBUG_INFO("Sending RXON\n"
		       "* with%s RXON_FILTER_ASSOC_MSK\n"
		       "* channel = %d\n"
1127
		       "* bssid = %s\n",
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		       ((priv->staging_rxon.filter_flags &
			 RXON_FILTER_ASSOC_MSK) ? "" : "out"),
		       le16_to_cpu(priv->staging_rxon.channel),
1131
		       print_mac(mac, priv->staging_rxon.bssid_addr));
Z
Zhu Yi 已提交
1132 1133

	/* Apply the new configuration */
C
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	rc = iwl3945_send_cmd_pdu(priv, REPLY_RXON,
			      sizeof(struct iwl3945_rxon_cmd), &priv->staging_rxon);
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	if (rc) {
		IWL_ERROR("Error setting new configuration (%d).\n", rc);
		return rc;
	}

	memcpy(active_rxon, &priv->staging_rxon, sizeof(*active_rxon));

C
Christoph Hellwig 已提交
1143
	iwl3945_clear_stations_table(priv);
1144

Z
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	/* If we issue a new RXON command which required a tune then we must
	 * send a new TXPOWER command or we won't be able to Tx any frames */
C
Christoph Hellwig 已提交
1147
	rc = iwl3945_hw_reg_send_txpower(priv);
Z
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	if (rc) {
		IWL_ERROR("Error setting Tx power (%d).\n", rc);
		return rc;
	}

	/* Add the broadcast address so we can send broadcast frames */
C
Christoph Hellwig 已提交
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	if (iwl3945_add_station(priv, iwl3945_broadcast_addr, 0, 0) ==
Z
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	    IWL_INVALID_STATION) {
		IWL_ERROR("Error adding BROADCAST address for transmit.\n");
		return -EIO;
	}

	/* If we have set the ASSOC_MSK and we are in BSS mode then
	 * add the IWL_AP_ID to the station rate table */
C
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	if (iwl3945_is_associated(priv) &&
Z
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1163
	    (priv->iw_mode == IEEE80211_IF_TYPE_STA))
C
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		if (iwl3945_add_station(priv, priv->active_rxon.bssid_addr, 1, 0)
Z
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		    == IWL_INVALID_STATION) {
			IWL_ERROR("Error adding AP address for transmit.\n");
			return -EIO;
		}

1170
	/* Init the hardware's rate fallback order based on the band */
Z
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1171 1172 1173 1174 1175 1176 1177 1178 1179
	rc = iwl3945_init_hw_rate_table(priv);
	if (rc) {
		IWL_ERROR("Error setting HW rate table: %02X\n", rc);
		return -EIO;
	}

	return 0;
}

C
Christoph Hellwig 已提交
1180
static int iwl3945_send_bt_config(struct iwl3945_priv *priv)
Z
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1181
{
C
Christoph Hellwig 已提交
1182
	struct iwl3945_bt_cmd bt_cmd = {
Z
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		.flags = 3,
		.lead_time = 0xAA,
		.max_kill = 1,
		.kill_ack_mask = 0,
		.kill_cts_mask = 0,
	};

C
Christoph Hellwig 已提交
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	return iwl3945_send_cmd_pdu(priv, REPLY_BT_CONFIG,
				sizeof(struct iwl3945_bt_cmd), &bt_cmd);
Z
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}

C
Christoph Hellwig 已提交
1194
static int iwl3945_send_scan_abort(struct iwl3945_priv *priv)
Z
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1195 1196
{
	int rc = 0;
C
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	struct iwl3945_rx_packet *res;
	struct iwl3945_host_cmd cmd = {
Z
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		.id = REPLY_SCAN_ABORT_CMD,
		.meta.flags = CMD_WANT_SKB,
	};

	/* If there isn't a scan actively going on in the hardware
	 * then we are in between scan bands and not actually
	 * actively scanning, so don't send the abort command */
	if (!test_bit(STATUS_SCAN_HW, &priv->status)) {
		clear_bit(STATUS_SCAN_ABORTING, &priv->status);
		return 0;
	}

C
Christoph Hellwig 已提交
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	rc = iwl3945_send_cmd_sync(priv, &cmd);
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	if (rc) {
		clear_bit(STATUS_SCAN_ABORTING, &priv->status);
		return rc;
	}

C
Christoph Hellwig 已提交
1217
	res = (struct iwl3945_rx_packet *)cmd.meta.u.skb->data;
Z
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1218 1219 1220 1221 1222 1223 1224 1225 1226 1227 1228 1229 1230 1231 1232 1233 1234
	if (res->u.status != CAN_ABORT_STATUS) {
		/* The scan abort will return 1 for success or
		 * 2 for "failure".  A failure condition can be
		 * due to simply not being in an active scan which
		 * can occur if we send the scan abort before we
		 * the microcode has notified us that a scan is
		 * completed. */
		IWL_DEBUG_INFO("SCAN_ABORT returned %d.\n", res->u.status);
		clear_bit(STATUS_SCAN_ABORTING, &priv->status);
		clear_bit(STATUS_SCAN_HW, &priv->status);
	}

	dev_kfree_skb_any(cmd.meta.u.skb);

	return rc;
}

C
Christoph Hellwig 已提交
1235 1236
static int iwl3945_card_state_sync_callback(struct iwl3945_priv *priv,
					struct iwl3945_cmd *cmd,
Z
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1237 1238 1239 1240 1241 1242 1243 1244
					struct sk_buff *skb)
{
	return 1;
}

/*
 * CARD_STATE_CMD
 *
1245
 * Use: Sets the device's internal card state to enable, disable, or halt
Z
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1246 1247 1248 1249 1250 1251
 *
 * When in the 'enable' state the card operates as normal.
 * When in the 'disable' state, the card enters into a low power mode.
 * When in the 'halt' state, the card is shut down and must be fully
 * restarted to come back on.
 */
C
Christoph Hellwig 已提交
1252
static int iwl3945_send_card_state(struct iwl3945_priv *priv, u32 flags, u8 meta_flag)
Z
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1253
{
C
Christoph Hellwig 已提交
1254
	struct iwl3945_host_cmd cmd = {
Z
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1255 1256 1257 1258 1259 1260 1261
		.id = REPLY_CARD_STATE_CMD,
		.len = sizeof(u32),
		.data = &flags,
		.meta.flags = meta_flag,
	};

	if (meta_flag & CMD_ASYNC)
C
Christoph Hellwig 已提交
1262
		cmd.meta.u.callback = iwl3945_card_state_sync_callback;
Z
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1263

C
Christoph Hellwig 已提交
1264
	return iwl3945_send_cmd(priv, &cmd);
Z
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1265 1266
}

C
Christoph Hellwig 已提交
1267 1268
static int iwl3945_add_sta_sync_callback(struct iwl3945_priv *priv,
				     struct iwl3945_cmd *cmd, struct sk_buff *skb)
Z
Zhu Yi 已提交
1269
{
C
Christoph Hellwig 已提交
1270
	struct iwl3945_rx_packet *res = NULL;
Z
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1271 1272 1273 1274 1275 1276

	if (!skb) {
		IWL_ERROR("Error: Response NULL in REPLY_ADD_STA.\n");
		return 1;
	}

C
Christoph Hellwig 已提交
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	res = (struct iwl3945_rx_packet *)skb->data;
Z
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	if (res->hdr.flags & IWL_CMD_FAILED_MSK) {
		IWL_ERROR("Bad return from REPLY_ADD_STA (0x%08X)\n",
			  res->hdr.flags);
		return 1;
	}

	switch (res->u.add_sta.status) {
	case ADD_STA_SUCCESS_MSK:
		break;
	default:
		break;
	}

	/* We didn't cache the SKB; let the caller free it */
	return 1;
}

C
Christoph Hellwig 已提交
1295 1296
int iwl3945_send_add_station(struct iwl3945_priv *priv,
			 struct iwl3945_addsta_cmd *sta, u8 flags)
Z
Zhu Yi 已提交
1297
{
C
Christoph Hellwig 已提交
1298
	struct iwl3945_rx_packet *res = NULL;
Z
Zhu Yi 已提交
1299
	int rc = 0;
C
Christoph Hellwig 已提交
1300
	struct iwl3945_host_cmd cmd = {
Z
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1301
		.id = REPLY_ADD_STA,
C
Christoph Hellwig 已提交
1302
		.len = sizeof(struct iwl3945_addsta_cmd),
Z
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1303 1304 1305 1306 1307
		.meta.flags = flags,
		.data = sta,
	};

	if (flags & CMD_ASYNC)
C
Christoph Hellwig 已提交
1308
		cmd.meta.u.callback = iwl3945_add_sta_sync_callback;
Z
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1309 1310 1311
	else
		cmd.meta.flags |= CMD_WANT_SKB;

C
Christoph Hellwig 已提交
1312
	rc = iwl3945_send_cmd(priv, &cmd);
Z
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1313 1314 1315 1316

	if (rc || (flags & CMD_ASYNC))
		return rc;

C
Christoph Hellwig 已提交
1317
	res = (struct iwl3945_rx_packet *)cmd.meta.u.skb->data;
Z
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1318 1319 1320 1321 1322 1323 1324 1325 1326 1327 1328 1329 1330 1331 1332 1333 1334 1335 1336 1337 1338 1339 1340 1341
	if (res->hdr.flags & IWL_CMD_FAILED_MSK) {
		IWL_ERROR("Bad return from REPLY_ADD_STA (0x%08X)\n",
			  res->hdr.flags);
		rc = -EIO;
	}

	if (rc == 0) {
		switch (res->u.add_sta.status) {
		case ADD_STA_SUCCESS_MSK:
			IWL_DEBUG_INFO("REPLY_ADD_STA PASSED\n");
			break;
		default:
			rc = -EIO;
			IWL_WARNING("REPLY_ADD_STA failed\n");
			break;
		}
	}

	priv->alloc_rxb_skb--;
	dev_kfree_skb_any(cmd.meta.u.skb);

	return rc;
}

C
Christoph Hellwig 已提交
1342
static int iwl3945_update_sta_key_info(struct iwl3945_priv *priv,
Z
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1343 1344 1345 1346 1347 1348 1349 1350 1351 1352 1353 1354 1355 1356 1357 1358 1359 1360 1361 1362 1363 1364 1365 1366 1367 1368 1369 1370 1371 1372 1373 1374 1375
				   struct ieee80211_key_conf *keyconf,
				   u8 sta_id)
{
	unsigned long flags;
	__le16 key_flags = 0;

	switch (keyconf->alg) {
	case ALG_CCMP:
		key_flags |= STA_KEY_FLG_CCMP;
		key_flags |= cpu_to_le16(
				keyconf->keyidx << STA_KEY_FLG_KEYID_POS);
		key_flags &= ~STA_KEY_FLG_INVALID;
		break;
	case ALG_TKIP:
	case ALG_WEP:
	default:
		return -EINVAL;
	}
	spin_lock_irqsave(&priv->sta_lock, flags);
	priv->stations[sta_id].keyinfo.alg = keyconf->alg;
	priv->stations[sta_id].keyinfo.keylen = keyconf->keylen;
	memcpy(priv->stations[sta_id].keyinfo.key, keyconf->key,
	       keyconf->keylen);

	memcpy(priv->stations[sta_id].sta.key.key, keyconf->key,
	       keyconf->keylen);
	priv->stations[sta_id].sta.key.key_flags = key_flags;
	priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_KEY_MASK;
	priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;

	spin_unlock_irqrestore(&priv->sta_lock, flags);

	IWL_DEBUG_INFO("hwcrypto: modify ucode station key info\n");
C
Christoph Hellwig 已提交
1376
	iwl3945_send_add_station(priv, &priv->stations[sta_id].sta, 0);
Z
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1377 1378 1379
	return 0;
}

C
Christoph Hellwig 已提交
1380
static int iwl3945_clear_sta_key_info(struct iwl3945_priv *priv, u8 sta_id)
Z
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1381 1382 1383 1384
{
	unsigned long flags;

	spin_lock_irqsave(&priv->sta_lock, flags);
C
Christoph Hellwig 已提交
1385 1386
	memset(&priv->stations[sta_id].keyinfo, 0, sizeof(struct iwl3945_hw_key));
	memset(&priv->stations[sta_id].sta.key, 0, sizeof(struct iwl3945_keyinfo));
Z
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	priv->stations[sta_id].sta.key.key_flags = STA_KEY_FLG_NO_ENC;
	priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_KEY_MASK;
	priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
	spin_unlock_irqrestore(&priv->sta_lock, flags);

	IWL_DEBUG_INFO("hwcrypto: clear ucode station key info\n");
C
Christoph Hellwig 已提交
1393
	iwl3945_send_add_station(priv, &priv->stations[sta_id].sta, 0);
Z
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1394 1395 1396
	return 0;
}

C
Christoph Hellwig 已提交
1397
static void iwl3945_clear_free_frames(struct iwl3945_priv *priv)
Z
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1398 1399 1400 1401 1402 1403 1404 1405 1406
{
	struct list_head *element;

	IWL_DEBUG_INFO("%d frames on pre-allocated heap on clear.\n",
		       priv->frames_count);

	while (!list_empty(&priv->free_frames)) {
		element = priv->free_frames.next;
		list_del(element);
C
Christoph Hellwig 已提交
1407
		kfree(list_entry(element, struct iwl3945_frame, list));
Z
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1408 1409 1410 1411 1412 1413 1414 1415 1416 1417
		priv->frames_count--;
	}

	if (priv->frames_count) {
		IWL_WARNING("%d frames still in use.  Did we lose one?\n",
			    priv->frames_count);
		priv->frames_count = 0;
	}
}

C
Christoph Hellwig 已提交
1418
static struct iwl3945_frame *iwl3945_get_free_frame(struct iwl3945_priv *priv)
Z
Zhu Yi 已提交
1419
{
C
Christoph Hellwig 已提交
1420
	struct iwl3945_frame *frame;
Z
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1421 1422 1423 1424 1425 1426 1427 1428 1429 1430 1431 1432 1433 1434
	struct list_head *element;
	if (list_empty(&priv->free_frames)) {
		frame = kzalloc(sizeof(*frame), GFP_KERNEL);
		if (!frame) {
			IWL_ERROR("Could not allocate frame!\n");
			return NULL;
		}

		priv->frames_count++;
		return frame;
	}

	element = priv->free_frames.next;
	list_del(element);
C
Christoph Hellwig 已提交
1435
	return list_entry(element, struct iwl3945_frame, list);
Z
Zhu Yi 已提交
1436 1437
}

C
Christoph Hellwig 已提交
1438
static void iwl3945_free_frame(struct iwl3945_priv *priv, struct iwl3945_frame *frame)
Z
Zhu Yi 已提交
1439 1440 1441 1442 1443
{
	memset(frame, 0, sizeof(*frame));
	list_add(&frame->list, &priv->free_frames);
}

C
Christoph Hellwig 已提交
1444
unsigned int iwl3945_fill_beacon_frame(struct iwl3945_priv *priv,
Z
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				struct ieee80211_hdr *hdr,
				const u8 *dest, int left)
{

C
Christoph Hellwig 已提交
1449
	if (!iwl3945_is_associated(priv) || !priv->ibss_beacon ||
Z
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1450 1451 1452 1453 1454 1455 1456 1457 1458 1459 1460 1461
	    ((priv->iw_mode != IEEE80211_IF_TYPE_IBSS) &&
	     (priv->iw_mode != IEEE80211_IF_TYPE_AP)))
		return 0;

	if (priv->ibss_beacon->len > left)
		return 0;

	memcpy(hdr, priv->ibss_beacon->data, priv->ibss_beacon->len);

	return priv->ibss_beacon->len;
}

C
Christoph Hellwig 已提交
1462
static u8 iwl3945_rate_get_lowest_plcp(int rate_mask)
Z
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{
	u8 i;

	for (i = IWL_RATE_1M_INDEX; i != IWL_RATE_INVALID;
C
Christoph Hellwig 已提交
1467
	     i = iwl3945_rates[i].next_ieee) {
Z
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		if (rate_mask & (1 << i))
C
Christoph Hellwig 已提交
1469
			return iwl3945_rates[i].plcp;
Z
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1470 1471 1472 1473 1474
	}

	return IWL_RATE_INVALID;
}

C
Christoph Hellwig 已提交
1475
static int iwl3945_send_beacon_cmd(struct iwl3945_priv *priv)
Z
Zhu Yi 已提交
1476
{
C
Christoph Hellwig 已提交
1477
	struct iwl3945_frame *frame;
Z
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1478 1479 1480 1481
	unsigned int frame_size;
	int rc;
	u8 rate;

C
Christoph Hellwig 已提交
1482
	frame = iwl3945_get_free_frame(priv);
Z
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1483 1484 1485 1486 1487 1488 1489 1490

	if (!frame) {
		IWL_ERROR("Could not obtain free frame buffer for beacon "
			  "command.\n");
		return -ENOMEM;
	}

	if (!(priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK)) {
C
Christoph Hellwig 已提交
1491
		rate = iwl3945_rate_get_lowest_plcp(priv->active_rate_basic &
Z
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1492 1493 1494 1495
						0xFF0);
		if (rate == IWL_INVALID_RATE)
			rate = IWL_RATE_6M_PLCP;
	} else {
C
Christoph Hellwig 已提交
1496
		rate = iwl3945_rate_get_lowest_plcp(priv->active_rate_basic & 0xF);
Z
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1497 1498 1499 1500
		if (rate == IWL_INVALID_RATE)
			rate = IWL_RATE_1M_PLCP;
	}

C
Christoph Hellwig 已提交
1501
	frame_size = iwl3945_hw_get_beacon_cmd(priv, frame, rate);
Z
Zhu Yi 已提交
1502

C
Christoph Hellwig 已提交
1503
	rc = iwl3945_send_cmd_pdu(priv, REPLY_TX_BEACON, frame_size,
Z
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1504 1505
			      &frame->u.cmd[0]);

C
Christoph Hellwig 已提交
1506
	iwl3945_free_frame(priv, frame);
Z
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	return rc;
}

/******************************************************************************
 *
 * EEPROM related functions
 *
 ******************************************************************************/

C
Christoph Hellwig 已提交
1517
static void get_eeprom_mac(struct iwl3945_priv *priv, u8 *mac)
Z
Zhu Yi 已提交
1518 1519 1520 1521
{
	memcpy(mac, priv->eeprom.mac_address, 6);
}

1522 1523 1524 1525 1526 1527 1528 1529 1530 1531 1532 1533 1534 1535
/*
 * Clear the OWNER_MSK, to establish driver (instead of uCode running on
 * embedded controller) as EEPROM reader; each read is a series of pulses
 * to/from the EEPROM chip, not a single event, so even reads could conflict
 * if they weren't arbitrated by some ownership mechanism.  Here, the driver
 * simply claims ownership, which should be safe when this function is called
 * (i.e. before loading uCode!).
 */
static inline int iwl3945_eeprom_acquire_semaphore(struct iwl3945_priv *priv)
{
	_iwl3945_clear_bit(priv, CSR_EEPROM_GP, CSR_EEPROM_GP_IF_OWNER_MSK);
	return 0;
}

Z
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1536
/**
C
Christoph Hellwig 已提交
1537
 * iwl3945_eeprom_init - read EEPROM contents
Z
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1538
 *
1539
 * Load the EEPROM contents from adapter into priv->eeprom
Z
Zhu Yi 已提交
1540 1541 1542
 *
 * NOTE:  This routine uses the non-debug IO access functions.
 */
C
Christoph Hellwig 已提交
1543
int iwl3945_eeprom_init(struct iwl3945_priv *priv)
Z
Zhu Yi 已提交
1544
{
1545
	u16 *e = (u16 *)&priv->eeprom;
C
Christoph Hellwig 已提交
1546
	u32 gp = iwl3945_read32(priv, CSR_EEPROM_GP);
Z
Zhu Yi 已提交
1547 1548 1549 1550 1551 1552 1553 1554 1555 1556 1557 1558 1559
	u32 r;
	int sz = sizeof(priv->eeprom);
	int rc;
	int i;
	u16 addr;

	/* The EEPROM structure has several padding buffers within it
	 * and when adding new EEPROM maps is subject to programmer errors
	 * which may be very difficult to identify without explicitly
	 * checking the resulting size of the eeprom map. */
	BUILD_BUG_ON(sizeof(priv->eeprom) != IWL_EEPROM_IMAGE_SIZE);

	if ((gp & CSR_EEPROM_GP_VALID_MSK) == CSR_EEPROM_GP_BAD_SIGNATURE) {
J
Jiri Slaby 已提交
1560
		IWL_ERROR("EEPROM not found, EEPROM_GP=0x%08x\n", gp);
Z
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1561 1562 1563
		return -ENOENT;
	}

1564
	/* Make sure driver (instead of uCode) is allowed to read EEPROM */
C
Christoph Hellwig 已提交
1565
	rc = iwl3945_eeprom_acquire_semaphore(priv);
Z
Zhu Yi 已提交
1566
	if (rc < 0) {
1567
		IWL_ERROR("Failed to acquire EEPROM semaphore.\n");
Z
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1568 1569 1570 1571 1572
		return -ENOENT;
	}

	/* eeprom is an array of 16bit values */
	for (addr = 0; addr < sz; addr += sizeof(u16)) {
C
Christoph Hellwig 已提交
1573 1574
		_iwl3945_write32(priv, CSR_EEPROM_REG, addr << 1);
		_iwl3945_clear_bit(priv, CSR_EEPROM_REG, CSR_EEPROM_REG_BIT_CMD);
Z
Zhu Yi 已提交
1575 1576 1577

		for (i = 0; i < IWL_EEPROM_ACCESS_TIMEOUT;
					i += IWL_EEPROM_ACCESS_DELAY) {
C
Christoph Hellwig 已提交
1578
			r = _iwl3945_read_direct32(priv, CSR_EEPROM_REG);
Z
Zhu Yi 已提交
1579 1580 1581 1582 1583 1584
			if (r & CSR_EEPROM_REG_READ_VALID_MSK)
				break;
			udelay(IWL_EEPROM_ACCESS_DELAY);
		}

		if (!(r & CSR_EEPROM_REG_READ_VALID_MSK)) {
J
Jiri Slaby 已提交
1585
			IWL_ERROR("Time out reading EEPROM[%d]\n", addr);
Z
Zhu Yi 已提交
1586 1587
			return -ETIMEDOUT;
		}
1588
		e[addr / 2] = le16_to_cpu((__force __le16)(r >> 16));
Z
Zhu Yi 已提交
1589 1590 1591 1592 1593
	}

	return 0;
}

C
Christoph Hellwig 已提交
1594
static void iwl3945_unset_hw_setting(struct iwl3945_priv *priv)
Z
Zhu Yi 已提交
1595 1596 1597
{
	if (priv->hw_setting.shared_virt)
		pci_free_consistent(priv->pci_dev,
C
Christoph Hellwig 已提交
1598
				    sizeof(struct iwl3945_shared),
Z
Zhu Yi 已提交
1599 1600 1601 1602 1603
				    priv->hw_setting.shared_virt,
				    priv->hw_setting.shared_phys);
}

/**
C
Christoph Hellwig 已提交
1604
 * iwl3945_supported_rate_to_ie - fill in the supported rate in IE field
Z
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1605 1606 1607
 *
 * return : set the bit for each supported rate insert in ie
 */
C
Christoph Hellwig 已提交
1608
static u16 iwl3945_supported_rate_to_ie(u8 *ie, u16 supported_rate,
1609
				    u16 basic_rate, int *left)
Z
Zhu Yi 已提交
1610 1611 1612
{
	u16 ret_rates = 0, bit;
	int i;
1613 1614
	u8 *cnt = ie;
	u8 *rates = ie + 1;
Z
Zhu Yi 已提交
1615 1616 1617 1618

	for (bit = 1, i = 0; i < IWL_RATE_COUNT; i++, bit <<= 1) {
		if (bit & supported_rate) {
			ret_rates |= bit;
C
Christoph Hellwig 已提交
1619
			rates[*cnt] = iwl3945_rates[i].ieee |
1620 1621 1622 1623 1624
				((bit & basic_rate) ? 0x80 : 0x00);
			(*cnt)++;
			(*left)--;
			if ((*left <= 0) ||
			    (*cnt >= IWL_SUPPORTED_RATES_IE_LEN))
Z
Zhu Yi 已提交
1625 1626 1627 1628 1629 1630 1631 1632
				break;
		}
	}

	return ret_rates;
}

/**
C
Christoph Hellwig 已提交
1633
 * iwl3945_fill_probe_req - fill in all required fields and IE for probe request
Z
Zhu Yi 已提交
1634
 */
C
Christoph Hellwig 已提交
1635
static u16 iwl3945_fill_probe_req(struct iwl3945_priv *priv,
Z
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1636 1637 1638 1639 1640
			      struct ieee80211_mgmt *frame,
			      int left, int is_direct)
{
	int len = 0;
	u8 *pos = NULL;
1641
	u16 active_rates, ret_rates, cck_rates;
Z
Zhu Yi 已提交
1642 1643 1644 1645 1646 1647 1648 1649 1650

	/* Make sure there is enough space for the probe request,
	 * two mandatory IEs and the data */
	left -= 24;
	if (left < 0)
		return 0;
	len += 24;

	frame->frame_control = cpu_to_le16(IEEE80211_STYPE_PROBE_REQ);
C
Christoph Hellwig 已提交
1651
	memcpy(frame->da, iwl3945_broadcast_addr, ETH_ALEN);
Z
Zhu Yi 已提交
1652
	memcpy(frame->sa, priv->mac_addr, ETH_ALEN);
C
Christoph Hellwig 已提交
1653
	memcpy(frame->bssid, iwl3945_broadcast_addr, ETH_ALEN);
Z
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1654 1655 1656 1657 1658 1659 1660 1661 1662 1663 1664 1665 1666 1667 1668 1669 1670 1671 1672 1673 1674 1675 1676 1677 1678 1679 1680 1681 1682 1683 1684 1685
	frame->seq_ctrl = 0;

	/* fill in our indirect SSID IE */
	/* ...next IE... */

	left -= 2;
	if (left < 0)
		return 0;
	len += 2;
	pos = &(frame->u.probe_req.variable[0]);
	*pos++ = WLAN_EID_SSID;
	*pos++ = 0;

	/* fill in our direct SSID IE... */
	if (is_direct) {
		/* ...next IE... */
		left -= 2 + priv->essid_len;
		if (left < 0)
			return 0;
		/* ... fill it in... */
		*pos++ = WLAN_EID_SSID;
		*pos++ = priv->essid_len;
		memcpy(pos, priv->essid, priv->essid_len);
		pos += priv->essid_len;
		len += 2 + priv->essid_len;
	}

	/* fill in supported rate */
	/* ...next IE... */
	left -= 2;
	if (left < 0)
		return 0;
1686

Z
Zhu Yi 已提交
1687 1688 1689
	/* ... fill it in... */
	*pos++ = WLAN_EID_SUPP_RATES;
	*pos = 0;
1690 1691 1692

	priv->active_rate = priv->rates_mask;
	active_rates = priv->active_rate;
Z
Zhu Yi 已提交
1693 1694
	priv->active_rate_basic = priv->rates_mask & IWL_BASIC_RATES_MASK;

1695
	cck_rates = IWL_CCK_RATES_MASK & active_rates;
C
Christoph Hellwig 已提交
1696
	ret_rates = iwl3945_supported_rate_to_ie(pos, cck_rates,
1697 1698 1699
			priv->active_rate_basic, &left);
	active_rates &= ~ret_rates;

C
Christoph Hellwig 已提交
1700
	ret_rates = iwl3945_supported_rate_to_ie(pos, active_rates,
1701 1702 1703
				 priv->active_rate_basic, &left);
	active_rates &= ~ret_rates;

Z
Zhu Yi 已提交
1704 1705
	len += 2 + *pos;
	pos += (*pos) + 1;
1706
	if (active_rates == 0)
Z
Zhu Yi 已提交
1707 1708 1709 1710 1711 1712 1713 1714 1715 1716
		goto fill_end;

	/* fill in supported extended rate */
	/* ...next IE... */
	left -= 2;
	if (left < 0)
		return 0;
	/* ... fill it in... */
	*pos++ = WLAN_EID_EXT_SUPP_RATES;
	*pos = 0;
C
Christoph Hellwig 已提交
1717
	iwl3945_supported_rate_to_ie(pos, active_rates,
1718
				 priv->active_rate_basic, &left);
Z
Zhu Yi 已提交
1719 1720 1721 1722 1723 1724 1725 1726 1727 1728
	if (*pos > 0)
		len += 2 + *pos;

 fill_end:
	return (u16)len;
}

/*
 * QoS  support
*/
C
Christoph Hellwig 已提交
1729 1730
static int iwl3945_send_qos_params_command(struct iwl3945_priv *priv,
				       struct iwl3945_qosparam_cmd *qos)
Z
Zhu Yi 已提交
1731 1732
{

C
Christoph Hellwig 已提交
1733 1734
	return iwl3945_send_cmd_pdu(priv, REPLY_QOS_PARAM,
				sizeof(struct iwl3945_qosparam_cmd), qos);
Z
Zhu Yi 已提交
1735 1736
}

C
Christoph Hellwig 已提交
1737
static void iwl3945_reset_qos(struct iwl3945_priv *priv)
Z
Zhu Yi 已提交
1738 1739 1740 1741 1742 1743 1744 1745 1746 1747 1748 1749 1750 1751 1752 1753 1754 1755 1756 1757 1758 1759 1760 1761 1762 1763 1764 1765 1766 1767 1768 1769 1770 1771 1772 1773 1774 1775 1776 1777 1778 1779 1780 1781 1782 1783 1784 1785 1786 1787 1788 1789 1790 1791 1792 1793 1794 1795 1796 1797 1798 1799 1800 1801 1802 1803 1804 1805 1806 1807 1808 1809 1810 1811 1812 1813 1814 1815 1816 1817 1818 1819 1820 1821 1822 1823
{
	u16 cw_min = 15;
	u16 cw_max = 1023;
	u8 aifs = 2;
	u8 is_legacy = 0;
	unsigned long flags;
	int i;

	spin_lock_irqsave(&priv->lock, flags);
	priv->qos_data.qos_active = 0;

	if (priv->iw_mode == IEEE80211_IF_TYPE_IBSS) {
		if (priv->qos_data.qos_enable)
			priv->qos_data.qos_active = 1;
		if (!(priv->active_rate & 0xfff0)) {
			cw_min = 31;
			is_legacy = 1;
		}
	} else if (priv->iw_mode == IEEE80211_IF_TYPE_AP) {
		if (priv->qos_data.qos_enable)
			priv->qos_data.qos_active = 1;
	} else if (!(priv->staging_rxon.flags & RXON_FLG_SHORT_SLOT_MSK)) {
		cw_min = 31;
		is_legacy = 1;
	}

	if (priv->qos_data.qos_active)
		aifs = 3;

	priv->qos_data.def_qos_parm.ac[0].cw_min = cpu_to_le16(cw_min);
	priv->qos_data.def_qos_parm.ac[0].cw_max = cpu_to_le16(cw_max);
	priv->qos_data.def_qos_parm.ac[0].aifsn = aifs;
	priv->qos_data.def_qos_parm.ac[0].edca_txop = 0;
	priv->qos_data.def_qos_parm.ac[0].reserved1 = 0;

	if (priv->qos_data.qos_active) {
		i = 1;
		priv->qos_data.def_qos_parm.ac[i].cw_min = cpu_to_le16(cw_min);
		priv->qos_data.def_qos_parm.ac[i].cw_max = cpu_to_le16(cw_max);
		priv->qos_data.def_qos_parm.ac[i].aifsn = 7;
		priv->qos_data.def_qos_parm.ac[i].edca_txop = 0;
		priv->qos_data.def_qos_parm.ac[i].reserved1 = 0;

		i = 2;
		priv->qos_data.def_qos_parm.ac[i].cw_min =
			cpu_to_le16((cw_min + 1) / 2 - 1);
		priv->qos_data.def_qos_parm.ac[i].cw_max =
			cpu_to_le16(cw_max);
		priv->qos_data.def_qos_parm.ac[i].aifsn = 2;
		if (is_legacy)
			priv->qos_data.def_qos_parm.ac[i].edca_txop =
				cpu_to_le16(6016);
		else
			priv->qos_data.def_qos_parm.ac[i].edca_txop =
				cpu_to_le16(3008);
		priv->qos_data.def_qos_parm.ac[i].reserved1 = 0;

		i = 3;
		priv->qos_data.def_qos_parm.ac[i].cw_min =
			cpu_to_le16((cw_min + 1) / 4 - 1);
		priv->qos_data.def_qos_parm.ac[i].cw_max =
			cpu_to_le16((cw_max + 1) / 2 - 1);
		priv->qos_data.def_qos_parm.ac[i].aifsn = 2;
		priv->qos_data.def_qos_parm.ac[i].reserved1 = 0;
		if (is_legacy)
			priv->qos_data.def_qos_parm.ac[i].edca_txop =
				cpu_to_le16(3264);
		else
			priv->qos_data.def_qos_parm.ac[i].edca_txop =
				cpu_to_le16(1504);
	} else {
		for (i = 1; i < 4; i++) {
			priv->qos_data.def_qos_parm.ac[i].cw_min =
				cpu_to_le16(cw_min);
			priv->qos_data.def_qos_parm.ac[i].cw_max =
				cpu_to_le16(cw_max);
			priv->qos_data.def_qos_parm.ac[i].aifsn = aifs;
			priv->qos_data.def_qos_parm.ac[i].edca_txop = 0;
			priv->qos_data.def_qos_parm.ac[i].reserved1 = 0;
		}
	}
	IWL_DEBUG_QOS("set QoS to default \n");

	spin_unlock_irqrestore(&priv->lock, flags);
}

C
Christoph Hellwig 已提交
1824
static void iwl3945_activate_qos(struct iwl3945_priv *priv, u8 force)
Z
Zhu Yi 已提交
1825 1826 1827 1828 1829 1830 1831 1832 1833 1834 1835 1836 1837 1838 1839 1840 1841 1842 1843 1844 1845 1846 1847
{
	unsigned long flags;

	if (test_bit(STATUS_EXIT_PENDING, &priv->status))
		return;

	if (!priv->qos_data.qos_enable)
		return;

	spin_lock_irqsave(&priv->lock, flags);
	priv->qos_data.def_qos_parm.qos_flags = 0;

	if (priv->qos_data.qos_cap.q_AP.queue_request &&
	    !priv->qos_data.qos_cap.q_AP.txop_request)
		priv->qos_data.def_qos_parm.qos_flags |=
			QOS_PARAM_FLG_TXOP_TYPE_MSK;

	if (priv->qos_data.qos_active)
		priv->qos_data.def_qos_parm.qos_flags |=
			QOS_PARAM_FLG_UPDATE_EDCA_MSK;

	spin_unlock_irqrestore(&priv->lock, flags);

C
Christoph Hellwig 已提交
1848
	if (force || iwl3945_is_associated(priv)) {
Z
Zhu Yi 已提交
1849 1850 1851
		IWL_DEBUG_QOS("send QoS cmd with Qos active %d \n",
			      priv->qos_data.qos_active);

C
Christoph Hellwig 已提交
1852
		iwl3945_send_qos_params_command(priv,
Z
Zhu Yi 已提交
1853 1854 1855 1856 1857 1858 1859 1860 1861 1862 1863 1864 1865 1866 1867 1868 1869 1870 1871 1872 1873
				&(priv->qos_data.def_qos_parm));
	}
}

/*
 * Power management (not Tx power!) functions
 */
#define MSEC_TO_USEC 1024

#define NOSLP __constant_cpu_to_le32(0)
#define SLP IWL_POWER_DRIVER_ALLOW_SLEEP_MSK
#define SLP_TIMEOUT(T) __constant_cpu_to_le32((T) * MSEC_TO_USEC)
#define SLP_VEC(X0, X1, X2, X3, X4) {__constant_cpu_to_le32(X0), \
				     __constant_cpu_to_le32(X1), \
				     __constant_cpu_to_le32(X2), \
				     __constant_cpu_to_le32(X3), \
				     __constant_cpu_to_le32(X4)}


/* default power management (not Tx power) table values */
/* for tim  0-10 */
C
Christoph Hellwig 已提交
1874
static struct iwl3945_power_vec_entry range_0[IWL_POWER_AC] = {
Z
Zhu Yi 已提交
1875 1876 1877 1878 1879 1880 1881 1882 1883
	{{NOSLP, SLP_TIMEOUT(0), SLP_TIMEOUT(0), SLP_VEC(0, 0, 0, 0, 0)}, 0},
	{{SLP, SLP_TIMEOUT(200), SLP_TIMEOUT(500), SLP_VEC(1, 2, 3, 4, 4)}, 0},
	{{SLP, SLP_TIMEOUT(200), SLP_TIMEOUT(300), SLP_VEC(2, 4, 6, 7, 7)}, 0},
	{{SLP, SLP_TIMEOUT(50), SLP_TIMEOUT(100), SLP_VEC(2, 6, 9, 9, 10)}, 0},
	{{SLP, SLP_TIMEOUT(50), SLP_TIMEOUT(25), SLP_VEC(2, 7, 9, 9, 10)}, 1},
	{{SLP, SLP_TIMEOUT(25), SLP_TIMEOUT(25), SLP_VEC(4, 7, 10, 10, 10)}, 1}
};

/* for tim > 10 */
C
Christoph Hellwig 已提交
1884
static struct iwl3945_power_vec_entry range_1[IWL_POWER_AC] = {
Z
Zhu Yi 已提交
1885 1886 1887 1888 1889 1890 1891 1892 1893 1894 1895 1896
	{{NOSLP, SLP_TIMEOUT(0), SLP_TIMEOUT(0), SLP_VEC(0, 0, 0, 0, 0)}, 0},
	{{SLP, SLP_TIMEOUT(200), SLP_TIMEOUT(500),
		 SLP_VEC(1, 2, 3, 4, 0xFF)}, 0},
	{{SLP, SLP_TIMEOUT(200), SLP_TIMEOUT(300),
		 SLP_VEC(2, 4, 6, 7, 0xFF)}, 0},
	{{SLP, SLP_TIMEOUT(50), SLP_TIMEOUT(100),
		 SLP_VEC(2, 6, 9, 9, 0xFF)}, 0},
	{{SLP, SLP_TIMEOUT(50), SLP_TIMEOUT(25), SLP_VEC(2, 7, 9, 9, 0xFF)}, 0},
	{{SLP, SLP_TIMEOUT(25), SLP_TIMEOUT(25),
		 SLP_VEC(4, 7, 10, 10, 0xFF)}, 0}
};

C
Christoph Hellwig 已提交
1897
int iwl3945_power_init_handle(struct iwl3945_priv *priv)
Z
Zhu Yi 已提交
1898 1899
{
	int rc = 0, i;
C
Christoph Hellwig 已提交
1900 1901
	struct iwl3945_power_mgr *pow_data;
	int size = sizeof(struct iwl3945_power_vec_entry) * IWL_POWER_AC;
Z
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1902 1903 1904 1905 1906 1907 1908 1909 1910 1911 1912 1913 1914 1915 1916 1917 1918 1919
	u16 pci_pm;

	IWL_DEBUG_POWER("Initialize power \n");

	pow_data = &(priv->power_data);

	memset(pow_data, 0, sizeof(*pow_data));

	pow_data->active_index = IWL_POWER_RANGE_0;
	pow_data->dtim_val = 0xffff;

	memcpy(&pow_data->pwr_range_0[0], &range_0[0], size);
	memcpy(&pow_data->pwr_range_1[0], &range_1[0], size);

	rc = pci_read_config_word(priv->pci_dev, PCI_LINK_CTRL, &pci_pm);
	if (rc != 0)
		return 0;
	else {
C
Christoph Hellwig 已提交
1920
		struct iwl3945_powertable_cmd *cmd;
Z
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1921 1922 1923 1924 1925 1926 1927 1928 1929 1930 1931 1932 1933 1934 1935

		IWL_DEBUG_POWER("adjust power command flags\n");

		for (i = 0; i < IWL_POWER_AC; i++) {
			cmd = &pow_data->pwr_range_0[i].cmd;

			if (pci_pm & 0x1)
				cmd->flags &= ~IWL_POWER_PCI_PM_MSK;
			else
				cmd->flags |= IWL_POWER_PCI_PM_MSK;
		}
	}
	return rc;
}

C
Christoph Hellwig 已提交
1936 1937
static int iwl3945_update_power_cmd(struct iwl3945_priv *priv,
				struct iwl3945_powertable_cmd *cmd, u32 mode)
Z
Zhu Yi 已提交
1938 1939 1940 1941
{
	int rc = 0, i;
	u8 skip;
	u32 max_sleep = 0;
C
Christoph Hellwig 已提交
1942
	struct iwl3945_power_vec_entry *range;
Z
Zhu Yi 已提交
1943
	u8 period = 0;
C
Christoph Hellwig 已提交
1944
	struct iwl3945_power_mgr *pow_data;
Z
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1945 1946 1947 1948 1949 1950 1951 1952 1953 1954 1955 1956

	if (mode > IWL_POWER_INDEX_5) {
		IWL_DEBUG_POWER("Error invalid power mode \n");
		return -1;
	}
	pow_data = &(priv->power_data);

	if (pow_data->active_index == IWL_POWER_RANGE_0)
		range = &pow_data->pwr_range_0[0];
	else
		range = &pow_data->pwr_range_1[1];

C
Christoph Hellwig 已提交
1957
	memcpy(cmd, &range[mode].cmd, sizeof(struct iwl3945_powertable_cmd));
Z
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1958 1959 1960 1961 1962 1963 1964 1965 1966 1967 1968 1969 1970 1971 1972 1973 1974 1975 1976 1977 1978 1979 1980 1981 1982 1983 1984 1985 1986 1987 1988 1989 1990 1991 1992 1993 1994 1995 1996 1997 1998 1999

#ifdef IWL_MAC80211_DISABLE
	if (priv->assoc_network != NULL) {
		unsigned long flags;

		period = priv->assoc_network->tim.tim_period;
	}
#endif	/*IWL_MAC80211_DISABLE */
	skip = range[mode].no_dtim;

	if (period == 0) {
		period = 1;
		skip = 0;
	}

	if (skip == 0) {
		max_sleep = period;
		cmd->flags &= ~IWL_POWER_SLEEP_OVER_DTIM_MSK;
	} else {
		__le32 slp_itrvl = cmd->sleep_interval[IWL_POWER_VEC_SIZE - 1];
		max_sleep = (le32_to_cpu(slp_itrvl) / period) * period;
		cmd->flags |= IWL_POWER_SLEEP_OVER_DTIM_MSK;
	}

	for (i = 0; i < IWL_POWER_VEC_SIZE; i++) {
		if (le32_to_cpu(cmd->sleep_interval[i]) > max_sleep)
			cmd->sleep_interval[i] = cpu_to_le32(max_sleep);
	}

	IWL_DEBUG_POWER("Flags value = 0x%08X\n", cmd->flags);
	IWL_DEBUG_POWER("Tx timeout = %u\n", le32_to_cpu(cmd->tx_data_timeout));
	IWL_DEBUG_POWER("Rx timeout = %u\n", le32_to_cpu(cmd->rx_data_timeout));
	IWL_DEBUG_POWER("Sleep interval vector = { %d , %d , %d , %d , %d }\n",
			le32_to_cpu(cmd->sleep_interval[0]),
			le32_to_cpu(cmd->sleep_interval[1]),
			le32_to_cpu(cmd->sleep_interval[2]),
			le32_to_cpu(cmd->sleep_interval[3]),
			le32_to_cpu(cmd->sleep_interval[4]));

	return rc;
}

C
Christoph Hellwig 已提交
2000
static int iwl3945_send_power_mode(struct iwl3945_priv *priv, u32 mode)
Z
Zhu Yi 已提交
2001
{
2002
	u32 uninitialized_var(final_mode);
Z
Zhu Yi 已提交
2003
	int rc;
C
Christoph Hellwig 已提交
2004
	struct iwl3945_powertable_cmd cmd;
Z
Zhu Yi 已提交
2005 2006

	/* If on battery, set to 3,
2007
	 * if plugged into AC power, set to CAM ("continuously aware mode"),
Z
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2008 2009 2010 2011 2012 2013 2014 2015 2016 2017 2018 2019 2020
	 * else user level */
	switch (mode) {
	case IWL_POWER_BATTERY:
		final_mode = IWL_POWER_INDEX_3;
		break;
	case IWL_POWER_AC:
		final_mode = IWL_POWER_MODE_CAM;
		break;
	default:
		final_mode = mode;
		break;
	}

C
Christoph Hellwig 已提交
2021
	iwl3945_update_power_cmd(priv, &cmd, final_mode);
Z
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2022

C
Christoph Hellwig 已提交
2023
	rc = iwl3945_send_cmd_pdu(priv, POWER_TABLE_CMD, sizeof(cmd), &cmd);
Z
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2024 2025 2026 2027 2028 2029 2030 2031 2032 2033

	if (final_mode == IWL_POWER_MODE_CAM)
		clear_bit(STATUS_POWER_PMI, &priv->status);
	else
		set_bit(STATUS_POWER_PMI, &priv->status);

	return rc;
}

/**
C
Christoph Hellwig 已提交
2034
 * iwl3945_scan_cancel - Cancel any currently executing HW scan
Z
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2035 2036 2037
 *
 * NOTE: priv->mutex is not required before calling this function
 */
C
Christoph Hellwig 已提交
2038
static int iwl3945_scan_cancel(struct iwl3945_priv *priv)
Z
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2039 2040 2041 2042 2043 2044 2045 2046 2047 2048 2049 2050 2051 2052 2053 2054 2055 2056 2057 2058 2059 2060
{
	if (!test_bit(STATUS_SCAN_HW, &priv->status)) {
		clear_bit(STATUS_SCANNING, &priv->status);
		return 0;
	}

	if (test_bit(STATUS_SCANNING, &priv->status)) {
		if (!test_bit(STATUS_SCAN_ABORTING, &priv->status)) {
			IWL_DEBUG_SCAN("Queuing scan abort.\n");
			set_bit(STATUS_SCAN_ABORTING, &priv->status);
			queue_work(priv->workqueue, &priv->abort_scan);

		} else
			IWL_DEBUG_SCAN("Scan abort already in progress.\n");

		return test_bit(STATUS_SCANNING, &priv->status);
	}

	return 0;
}

/**
C
Christoph Hellwig 已提交
2061
 * iwl3945_scan_cancel_timeout - Cancel any currently executing HW scan
Z
Zhu Yi 已提交
2062 2063 2064 2065
 * @ms: amount of time to wait (in milliseconds) for scan to abort
 *
 * NOTE: priv->mutex must be held before calling this function
 */
C
Christoph Hellwig 已提交
2066
static int iwl3945_scan_cancel_timeout(struct iwl3945_priv *priv, unsigned long ms)
Z
Zhu Yi 已提交
2067 2068 2069 2070
{
	unsigned long now = jiffies;
	int ret;

C
Christoph Hellwig 已提交
2071
	ret = iwl3945_scan_cancel(priv);
Z
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2072 2073 2074 2075 2076 2077 2078 2079 2080 2081 2082 2083 2084 2085 2086 2087
	if (ret && ms) {
		mutex_unlock(&priv->mutex);
		while (!time_after(jiffies, now + msecs_to_jiffies(ms)) &&
				test_bit(STATUS_SCANNING, &priv->status))
			msleep(1);
		mutex_lock(&priv->mutex);

		return test_bit(STATUS_SCANNING, &priv->status);
	}

	return ret;
}

#define MAX_UCODE_BEACON_INTERVAL	1024
#define INTEL_CONN_LISTEN_INTERVAL	__constant_cpu_to_le16(0xA)

C
Christoph Hellwig 已提交
2088
static __le16 iwl3945_adjust_beacon_interval(u16 beacon_val)
Z
Zhu Yi 已提交
2089 2090 2091 2092 2093 2094 2095 2096 2097 2098 2099 2100
{
	u16 new_val = 0;
	u16 beacon_factor = 0;

	beacon_factor =
	    (beacon_val + MAX_UCODE_BEACON_INTERVAL)
		/ MAX_UCODE_BEACON_INTERVAL;
	new_val = beacon_val / beacon_factor;

	return cpu_to_le16(new_val);
}

C
Christoph Hellwig 已提交
2101
static void iwl3945_setup_rxon_timing(struct iwl3945_priv *priv)
Z
Zhu Yi 已提交
2102 2103 2104 2105 2106 2107 2108 2109 2110 2111 2112 2113 2114 2115 2116 2117 2118 2119 2120 2121 2122 2123 2124 2125 2126 2127 2128 2129 2130
{
	u64 interval_tm_unit;
	u64 tsf, result;
	unsigned long flags;
	struct ieee80211_conf *conf = NULL;
	u16 beacon_int = 0;

	conf = ieee80211_get_hw_conf(priv->hw);

	spin_lock_irqsave(&priv->lock, flags);
	priv->rxon_timing.timestamp.dw[1] = cpu_to_le32(priv->timestamp1);
	priv->rxon_timing.timestamp.dw[0] = cpu_to_le32(priv->timestamp0);

	priv->rxon_timing.listen_interval = INTEL_CONN_LISTEN_INTERVAL;

	tsf = priv->timestamp1;
	tsf = ((tsf << 32) | priv->timestamp0);

	beacon_int = priv->beacon_int;
	spin_unlock_irqrestore(&priv->lock, flags);

	if (priv->iw_mode == IEEE80211_IF_TYPE_STA) {
		if (beacon_int == 0) {
			priv->rxon_timing.beacon_interval = cpu_to_le16(100);
			priv->rxon_timing.beacon_init_val = cpu_to_le32(102400);
		} else {
			priv->rxon_timing.beacon_interval =
				cpu_to_le16(beacon_int);
			priv->rxon_timing.beacon_interval =
C
Christoph Hellwig 已提交
2131
			    iwl3945_adjust_beacon_interval(
Z
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2132 2133 2134 2135 2136 2137
				le16_to_cpu(priv->rxon_timing.beacon_interval));
		}

		priv->rxon_timing.atim_window = 0;
	} else {
		priv->rxon_timing.beacon_interval =
C
Christoph Hellwig 已提交
2138
			iwl3945_adjust_beacon_interval(conf->beacon_int);
Z
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2139 2140 2141 2142 2143 2144 2145 2146 2147 2148 2149 2150 2151 2152 2153 2154 2155 2156
		/* TODO: we need to get atim_window from upper stack
		 * for now we set to 0 */
		priv->rxon_timing.atim_window = 0;
	}

	interval_tm_unit =
		(le16_to_cpu(priv->rxon_timing.beacon_interval) * 1024);
	result = do_div(tsf, interval_tm_unit);
	priv->rxon_timing.beacon_init_val =
	    cpu_to_le32((u32) ((u64) interval_tm_unit - result));

	IWL_DEBUG_ASSOC
	    ("beacon interval %d beacon timer %d beacon tim %d\n",
		le16_to_cpu(priv->rxon_timing.beacon_interval),
		le32_to_cpu(priv->rxon_timing.beacon_init_val),
		le16_to_cpu(priv->rxon_timing.atim_window));
}

C
Christoph Hellwig 已提交
2157
static int iwl3945_scan_initiate(struct iwl3945_priv *priv)
Z
Zhu Yi 已提交
2158 2159 2160 2161 2162 2163
{
	if (priv->iw_mode == IEEE80211_IF_TYPE_AP) {
		IWL_ERROR("APs don't scan.\n");
		return 0;
	}

C
Christoph Hellwig 已提交
2164
	if (!iwl3945_is_ready_rf(priv)) {
Z
Zhu Yi 已提交
2165 2166 2167 2168 2169 2170 2171 2172 2173 2174 2175 2176 2177 2178 2179 2180
		IWL_DEBUG_SCAN("Aborting scan due to not ready.\n");
		return -EIO;
	}

	if (test_bit(STATUS_SCANNING, &priv->status)) {
		IWL_DEBUG_SCAN("Scan already in progress.\n");
		return -EAGAIN;
	}

	if (test_bit(STATUS_SCAN_ABORTING, &priv->status)) {
		IWL_DEBUG_SCAN("Scan request while abort pending.  "
			       "Queuing.\n");
		return -EAGAIN;
	}

	IWL_DEBUG_INFO("Starting scan...\n");
2181 2182 2183 2184
	if (priv->cfg->sku & IWL_SKU_G)
		priv->scan_bands |= BIT(IEEE80211_BAND_2GHZ);
	if (priv->cfg->sku & IWL_SKU_A)
		priv->scan_bands |= BIT(IEEE80211_BAND_5GHZ);
Z
Zhu Yi 已提交
2185 2186 2187 2188 2189 2190 2191 2192 2193
	set_bit(STATUS_SCANNING, &priv->status);
	priv->scan_start = jiffies;
	priv->scan_pass_start = priv->scan_start;

	queue_work(priv->workqueue, &priv->request_scan);

	return 0;
}

C
Christoph Hellwig 已提交
2194
static int iwl3945_set_rxon_hwcrypto(struct iwl3945_priv *priv, int hw_decrypt)
Z
Zhu Yi 已提交
2195
{
C
Christoph Hellwig 已提交
2196
	struct iwl3945_rxon_cmd *rxon = &priv->staging_rxon;
Z
Zhu Yi 已提交
2197 2198 2199 2200 2201 2202 2203 2204 2205

	if (hw_decrypt)
		rxon->filter_flags &= ~RXON_FILTER_DIS_DECRYPT_MSK;
	else
		rxon->filter_flags |= RXON_FILTER_DIS_DECRYPT_MSK;

	return 0;
}

2206 2207
static void iwl3945_set_flags_for_phymode(struct iwl3945_priv *priv,
					  enum ieee80211_band band)
Z
Zhu Yi 已提交
2208
{
2209
	if (band == IEEE80211_BAND_5GHZ) {
Z
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2210 2211 2212 2213 2214
		priv->staging_rxon.flags &=
		    ~(RXON_FLG_BAND_24G_MSK | RXON_FLG_AUTO_DETECT_MSK
		      | RXON_FLG_CCK_MSK);
		priv->staging_rxon.flags |= RXON_FLG_SHORT_SLOT_MSK;
	} else {
C
Christoph Hellwig 已提交
2215
		/* Copied from iwl3945_bg_post_associate() */
Z
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2216 2217 2218 2219 2220 2221 2222 2223 2224 2225 2226 2227 2228 2229 2230
		if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_SLOT_TIME)
			priv->staging_rxon.flags |= RXON_FLG_SHORT_SLOT_MSK;
		else
			priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK;

		if (priv->iw_mode == IEEE80211_IF_TYPE_IBSS)
			priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK;

		priv->staging_rxon.flags |= RXON_FLG_BAND_24G_MSK;
		priv->staging_rxon.flags |= RXON_FLG_AUTO_DETECT_MSK;
		priv->staging_rxon.flags &= ~RXON_FLG_CCK_MSK;
	}
}

/*
2231
 * initialize rxon structure with default values from eeprom
Z
Zhu Yi 已提交
2232
 */
C
Christoph Hellwig 已提交
2233
static void iwl3945_connection_init_rx_config(struct iwl3945_priv *priv)
Z
Zhu Yi 已提交
2234
{
C
Christoph Hellwig 已提交
2235
	const struct iwl3945_channel_info *ch_info;
Z
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2236 2237 2238 2239 2240 2241 2242 2243 2244 2245 2246 2247 2248 2249 2250 2251 2252 2253 2254 2255 2256 2257 2258 2259 2260

	memset(&priv->staging_rxon, 0, sizeof(priv->staging_rxon));

	switch (priv->iw_mode) {
	case IEEE80211_IF_TYPE_AP:
		priv->staging_rxon.dev_type = RXON_DEV_TYPE_AP;
		break;

	case IEEE80211_IF_TYPE_STA:
		priv->staging_rxon.dev_type = RXON_DEV_TYPE_ESS;
		priv->staging_rxon.filter_flags = RXON_FILTER_ACCEPT_GRP_MSK;
		break;

	case IEEE80211_IF_TYPE_IBSS:
		priv->staging_rxon.dev_type = RXON_DEV_TYPE_IBSS;
		priv->staging_rxon.flags = RXON_FLG_SHORT_PREAMBLE_MSK;
		priv->staging_rxon.filter_flags = RXON_FILTER_BCON_AWARE_MSK |
						  RXON_FILTER_ACCEPT_GRP_MSK;
		break;

	case IEEE80211_IF_TYPE_MNTR:
		priv->staging_rxon.dev_type = RXON_DEV_TYPE_SNIFFER;
		priv->staging_rxon.filter_flags = RXON_FILTER_PROMISC_MSK |
		    RXON_FILTER_CTL2HOST_MSK | RXON_FILTER_ACCEPT_GRP_MSK;
		break;
2261 2262 2263
	default:
		IWL_ERROR("Unsupported interface type %d\n", priv->iw_mode);
		break;
Z
Zhu Yi 已提交
2264 2265 2266 2267 2268 2269 2270 2271 2272 2273 2274
	}

#if 0
	/* TODO:  Figure out when short_preamble would be set and cache from
	 * that */
	if (!hw_to_local(priv->hw)->short_preamble)
		priv->staging_rxon.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK;
	else
		priv->staging_rxon.flags |= RXON_FLG_SHORT_PREAMBLE_MSK;
#endif

2275
	ch_info = iwl3945_get_channel_info(priv, priv->band,
2276
				       le16_to_cpu(priv->active_rxon.channel));
Z
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2277 2278 2279 2280 2281 2282 2283 2284 2285 2286 2287 2288 2289 2290

	if (!ch_info)
		ch_info = &priv->channel_info[0];

	/*
	 * in some case A channels are all non IBSS
	 * in this case force B/G channel
	 */
	if ((priv->iw_mode == IEEE80211_IF_TYPE_IBSS) &&
	    !(is_channel_ibss(ch_info)))
		ch_info = &priv->channel_info[0];

	priv->staging_rxon.channel = cpu_to_le16(ch_info->channel);
	if (is_channel_a_band(ch_info))
2291
		priv->band = IEEE80211_BAND_5GHZ;
Z
Zhu Yi 已提交
2292
	else
2293
		priv->band = IEEE80211_BAND_2GHZ;
Z
Zhu Yi 已提交
2294

2295
	iwl3945_set_flags_for_phymode(priv, priv->band);
Z
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2296 2297 2298 2299 2300 2301 2302

	priv->staging_rxon.ofdm_basic_rates =
	    (IWL_OFDM_RATES_MASK >> IWL_FIRST_OFDM_RATE) & 0xFF;
	priv->staging_rxon.cck_basic_rates =
	    (IWL_CCK_RATES_MASK >> IWL_FIRST_CCK_RATE) & 0xF;
}

C
Christoph Hellwig 已提交
2303
static int iwl3945_set_mode(struct iwl3945_priv *priv, int mode)
Z
Zhu Yi 已提交
2304 2305
{
	if (mode == IEEE80211_IF_TYPE_IBSS) {
C
Christoph Hellwig 已提交
2306
		const struct iwl3945_channel_info *ch_info;
Z
Zhu Yi 已提交
2307

C
Christoph Hellwig 已提交
2308
		ch_info = iwl3945_get_channel_info(priv,
2309
			priv->band,
Z
Zhu Yi 已提交
2310 2311 2312 2313 2314 2315 2316 2317 2318 2319 2320
			le16_to_cpu(priv->staging_rxon.channel));

		if (!ch_info || !is_channel_ibss(ch_info)) {
			IWL_ERROR("channel %d not IBSS channel\n",
				  le16_to_cpu(priv->staging_rxon.channel));
			return -EINVAL;
		}
	}

	priv->iw_mode = mode;

C
Christoph Hellwig 已提交
2321
	iwl3945_connection_init_rx_config(priv);
Z
Zhu Yi 已提交
2322 2323
	memcpy(priv->staging_rxon.node_addr, priv->mac_addr, ETH_ALEN);

C
Christoph Hellwig 已提交
2324
	iwl3945_clear_stations_table(priv);
Z
Zhu Yi 已提交
2325

2326 2327 2328 2329 2330 2331 2332 2333 2334 2335 2336
	/* dont commit rxon if rf-kill is on*/
	if (!iwl3945_is_ready_rf(priv))
		return -EAGAIN;

	cancel_delayed_work(&priv->scan_check);
	if (iwl3945_scan_cancel_timeout(priv, 100)) {
		IWL_WARNING("Aborted scan still in progress after 100ms\n");
		IWL_DEBUG_MAC80211("leaving - scan abort failed.\n");
		return -EAGAIN;
	}

C
Christoph Hellwig 已提交
2337
	iwl3945_commit_rxon(priv);
Z
Zhu Yi 已提交
2338 2339 2340 2341

	return 0;
}

C
Christoph Hellwig 已提交
2342
static void iwl3945_build_tx_cmd_hwcrypto(struct iwl3945_priv *priv,
2343
				      struct ieee80211_tx_info *info,
C
Christoph Hellwig 已提交
2344
				      struct iwl3945_cmd *cmd,
Z
Zhu Yi 已提交
2345 2346 2347
				      struct sk_buff *skb_frag,
				      int last_frag)
{
2348
	struct iwl3945_hw_key *keyinfo =
2349
	    &priv->stations[info->control.hw_key->hw_key_idx].keyinfo;
Z
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2350 2351 2352 2353 2354 2355 2356 2357 2358 2359 2360 2361 2362 2363 2364 2365 2366 2367 2368 2369 2370 2371

	switch (keyinfo->alg) {
	case ALG_CCMP:
		cmd->cmd.tx.sec_ctl = TX_CMD_SEC_CCM;
		memcpy(cmd->cmd.tx.key, keyinfo->key, keyinfo->keylen);
		IWL_DEBUG_TX("tx_cmd with aes hwcrypto\n");
		break;

	case ALG_TKIP:
#if 0
		cmd->cmd.tx.sec_ctl = TX_CMD_SEC_TKIP;

		if (last_frag)
			memcpy(cmd->cmd.tx.tkip_mic.byte, skb_frag->tail - 8,
			       8);
		else
			memset(cmd->cmd.tx.tkip_mic.byte, 0, 8);
#endif
		break;

	case ALG_WEP:
		cmd->cmd.tx.sec_ctl = TX_CMD_SEC_WEP |
2372
		    (info->control.hw_key->hw_key_idx & TX_CMD_SEC_MSK) << TX_CMD_SEC_SHIFT;
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Zhu Yi 已提交
2373 2374 2375 2376 2377 2378 2379

		if (keyinfo->keylen == 13)
			cmd->cmd.tx.sec_ctl |= TX_CMD_SEC_KEY128;

		memcpy(&cmd->cmd.tx.key[3], keyinfo->key, keyinfo->keylen);

		IWL_DEBUG_TX("Configuring packet for WEP encryption "
2380
			     "with key %d\n", info->control.hw_key->hw_key_idx);
Z
Zhu Yi 已提交
2381 2382 2383 2384 2385 2386 2387 2388 2389 2390 2391
		break;

	default:
		printk(KERN_ERR "Unknown encode alg %d\n", keyinfo->alg);
		break;
	}
}

/*
 * handle build REPLY_TX command notification.
 */
C
Christoph Hellwig 已提交
2392 2393
static void iwl3945_build_tx_cmd_basic(struct iwl3945_priv *priv,
				  struct iwl3945_cmd *cmd,
2394
				  struct ieee80211_tx_info *info,
Z
Zhu Yi 已提交
2395 2396 2397
				  struct ieee80211_hdr *hdr,
				  int is_unicast, u8 std_id)
{
2398
	__le16 fc = hdr->frame_control;
Z
Zhu Yi 已提交
2399 2400 2401
	__le32 tx_flags = cmd->cmd.tx.tx_flags;

	cmd->cmd.tx.stop_time.life_time = TX_CMD_LIFE_TIME_INFINITE;
2402
	if (!(info->flags & IEEE80211_TX_CTL_NO_ACK)) {
Z
Zhu Yi 已提交
2403
		tx_flags |= TX_CMD_FLG_ACK_MSK;
2404
		if (ieee80211_is_mgmt(fc))
Z
Zhu Yi 已提交
2405
			tx_flags |= TX_CMD_FLG_SEQ_CTL_MSK;
2406
		if (ieee80211_is_probe_resp(fc) &&
Z
Zhu Yi 已提交
2407 2408 2409 2410 2411 2412 2413 2414
		    !(le16_to_cpu(hdr->seq_ctrl) & 0xf))
			tx_flags |= TX_CMD_FLG_TSF_MSK;
	} else {
		tx_flags &= (~TX_CMD_FLG_ACK_MSK);
		tx_flags |= TX_CMD_FLG_SEQ_CTL_MSK;
	}

	cmd->cmd.tx.sta_id = std_id;
2415
	if (ieee80211_has_morefrags(fc))
Z
Zhu Yi 已提交
2416 2417
		tx_flags |= TX_CMD_FLG_MORE_FRAG_MSK;

2418 2419
	if (ieee80211_is_data_qos(fc)) {
		u8 *qc = ieee80211_get_qos_ctl(hdr);
2420
		cmd->cmd.tx.tid_tspec = qc[0] & 0xf;
Z
Zhu Yi 已提交
2421
		tx_flags &= ~TX_CMD_FLG_SEQ_CTL_MSK;
2422
	} else {
Z
Zhu Yi 已提交
2423
		tx_flags |= TX_CMD_FLG_SEQ_CTL_MSK;
2424
	}
Z
Zhu Yi 已提交
2425

2426
	if (info->flags & IEEE80211_TX_CTL_USE_RTS_CTS) {
Z
Zhu Yi 已提交
2427 2428
		tx_flags |= TX_CMD_FLG_RTS_MSK;
		tx_flags &= ~TX_CMD_FLG_CTS_MSK;
2429
	} else if (info->flags & IEEE80211_TX_CTL_USE_CTS_PROTECT) {
Z
Zhu Yi 已提交
2430 2431 2432 2433 2434 2435 2436 2437
		tx_flags &= ~TX_CMD_FLG_RTS_MSK;
		tx_flags |= TX_CMD_FLG_CTS_MSK;
	}

	if ((tx_flags & TX_CMD_FLG_RTS_MSK) || (tx_flags & TX_CMD_FLG_CTS_MSK))
		tx_flags |= TX_CMD_FLG_FULL_TXOP_PROT_MSK;

	tx_flags &= ~(TX_CMD_FLG_ANT_SEL_MSK);
2438 2439
	if (ieee80211_is_mgmt(fc)) {
		if (ieee80211_is_assoc_req(fc) || ieee80211_is_reassoc_req(fc))
2440
			cmd->cmd.tx.timeout.pm_frame_timeout = cpu_to_le16(3);
Z
Zhu Yi 已提交
2441
		else
2442
			cmd->cmd.tx.timeout.pm_frame_timeout = cpu_to_le16(2);
M
Mohamed Abbas 已提交
2443
	} else {
Z
Zhu Yi 已提交
2444
		cmd->cmd.tx.timeout.pm_frame_timeout = 0;
M
Mohamed Abbas 已提交
2445 2446 2447 2448
#ifdef CONFIG_IWL3945_LEDS
		priv->rxtxpackets += le16_to_cpu(cmd->cmd.tx.len);
#endif
	}
Z
Zhu Yi 已提交
2449 2450 2451 2452 2453 2454

	cmd->cmd.tx.driver_txop = 0;
	cmd->cmd.tx.tx_flags = tx_flags;
	cmd->cmd.tx.next_frame_len = 0;
}

2455 2456 2457
/**
 * iwl3945_get_sta_id - Find station's index within station table
 */
C
Christoph Hellwig 已提交
2458
static int iwl3945_get_sta_id(struct iwl3945_priv *priv, struct ieee80211_hdr *hdr)
Z
Zhu Yi 已提交
2459 2460 2461 2462
{
	int sta_id;
	u16 fc = le16_to_cpu(hdr->frame_control);

2463
	/* If this frame is broadcast or management, use broadcast station id */
Z
Zhu Yi 已提交
2464 2465 2466 2467 2468 2469
	if (((fc & IEEE80211_FCTL_FTYPE) != IEEE80211_FTYPE_DATA) ||
	    is_multicast_ether_addr(hdr->addr1))
		return priv->hw_setting.bcast_sta_id;

	switch (priv->iw_mode) {

2470 2471
	/* If we are a client station in a BSS network, use the special
	 * AP station entry (that's the only station we communicate with) */
Z
Zhu Yi 已提交
2472 2473 2474 2475 2476
	case IEEE80211_IF_TYPE_STA:
		return IWL_AP_ID;

	/* If we are an AP, then find the station, or use BCAST */
	case IEEE80211_IF_TYPE_AP:
C
Christoph Hellwig 已提交
2477
		sta_id = iwl3945_hw_find_station(priv, hdr->addr1);
Z
Zhu Yi 已提交
2478 2479 2480 2481
		if (sta_id != IWL_INVALID_STATION)
			return sta_id;
		return priv->hw_setting.bcast_sta_id;

2482 2483
	/* If this frame is going out to an IBSS network, find the station,
	 * or create a new station table entry */
2484 2485 2486
	case IEEE80211_IF_TYPE_IBSS: {
		DECLARE_MAC_BUF(mac);

2487
		/* Create new station table entry */
C
Christoph Hellwig 已提交
2488
		sta_id = iwl3945_hw_find_station(priv, hdr->addr1);
Z
Zhu Yi 已提交
2489 2490 2491
		if (sta_id != IWL_INVALID_STATION)
			return sta_id;

C
Christoph Hellwig 已提交
2492
		sta_id = iwl3945_add_station(priv, hdr->addr1, 0, CMD_ASYNC);
Z
Zhu Yi 已提交
2493 2494 2495 2496

		if (sta_id != IWL_INVALID_STATION)
			return sta_id;

2497
		IWL_DEBUG_DROP("Station %s not in station map. "
Z
Zhu Yi 已提交
2498
			       "Defaulting to broadcast...\n",
2499
			       print_mac(mac, hdr->addr1));
C
Christoph Hellwig 已提交
2500
		iwl3945_print_hex_dump(IWL_DL_DROP, (u8 *) hdr, sizeof(*hdr));
Z
Zhu Yi 已提交
2501
		return priv->hw_setting.bcast_sta_id;
2502
	}
2503 2504 2505 2506 2507
	/* If we are in monitor mode, use BCAST. This is required for
	 * packet injection. */
	case IEEE80211_IF_TYPE_MNTR:
		return priv->hw_setting.bcast_sta_id;

Z
Zhu Yi 已提交
2508
	default:
J
Jiri Slaby 已提交
2509
		IWL_WARNING("Unknown mode of operation: %d\n", priv->iw_mode);
Z
Zhu Yi 已提交
2510 2511 2512 2513 2514 2515 2516
		return priv->hw_setting.bcast_sta_id;
	}
}

/*
 * start REPLY_TX command process
 */
2517
static int iwl3945_tx_skb(struct iwl3945_priv *priv, struct sk_buff *skb)
Z
Zhu Yi 已提交
2518 2519
{
	struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
2520
	struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
C
Christoph Hellwig 已提交
2521
	struct iwl3945_tfd_frame *tfd;
Z
Zhu Yi 已提交
2522
	u32 *control_flags;
2523
	int txq_id = skb_get_queue_mapping(skb);
C
Christoph Hellwig 已提交
2524 2525
	struct iwl3945_tx_queue *txq = NULL;
	struct iwl3945_queue *q = NULL;
Z
Zhu Yi 已提交
2526 2527
	dma_addr_t phys_addr;
	dma_addr_t txcmd_phys;
C
Christoph Hellwig 已提交
2528
	struct iwl3945_cmd *out_cmd = NULL;
2529 2530 2531
	u16 len, idx, len_org, hdr_len;
	u8 id;
	u8 unicast;
Z
Zhu Yi 已提交
2532
	u8 sta_id;
2533
	u8 tid = 0;
Z
Zhu Yi 已提交
2534
	u16 seq_number = 0;
2535
	__le16 fc;
Z
Zhu Yi 已提交
2536
	u8 wait_write_ptr = 0;
2537
	u8 *qc = NULL;
Z
Zhu Yi 已提交
2538 2539 2540 2541
	unsigned long flags;
	int rc;

	spin_lock_irqsave(&priv->lock, flags);
C
Christoph Hellwig 已提交
2542
	if (iwl3945_is_rfkill(priv)) {
Z
Zhu Yi 已提交
2543 2544 2545 2546
		IWL_DEBUG_DROP("Dropping - RF KILL\n");
		goto drop_unlock;
	}

2547
	if ((ieee80211_get_tx_rate(priv->hw, info)->hw_value & 0xFF) == IWL_INVALID_RATE) {
Z
Zhu Yi 已提交
2548 2549 2550 2551 2552 2553 2554
		IWL_ERROR("ERROR: No TX rate available.\n");
		goto drop_unlock;
	}

	unicast = !is_multicast_ether_addr(hdr->addr1);
	id = 0;

2555
	fc = hdr->frame_control;
Z
Zhu Yi 已提交
2556

2557
#ifdef CONFIG_IWL3945_DEBUG
Z
Zhu Yi 已提交
2558 2559
	if (ieee80211_is_auth(fc))
		IWL_DEBUG_TX("Sending AUTH frame\n");
2560
	else if (ieee80211_is_assoc_req(fc))
Z
Zhu Yi 已提交
2561
		IWL_DEBUG_TX("Sending ASSOC frame\n");
2562
	else if (ieee80211_is_reassoc_req(fc))
Z
Zhu Yi 已提交
2563 2564 2565
		IWL_DEBUG_TX("Sending REASSOC frame\n");
#endif

2566
	/* drop all data frame if we are not associated */
2567 2568 2569 2570
	if (ieee80211_is_data(fc) &&
	    (priv->iw_mode != IEEE80211_IF_TYPE_MNTR) && /* packet injection */
	    (!iwl3945_is_associated(priv) ||
	     ((priv->iw_mode == IEEE80211_IF_TYPE_STA) && !priv->assoc_id))) {
C
Christoph Hellwig 已提交
2571
		IWL_DEBUG_DROP("Dropping - !iwl3945_is_associated\n");
Z
Zhu Yi 已提交
2572 2573 2574 2575 2576
		goto drop_unlock;
	}

	spin_unlock_irqrestore(&priv->lock, flags);

2577
	hdr_len = ieee80211_get_hdrlen(le16_to_cpu(fc));
2578 2579

	/* Find (or create) index into station table for destination station */
C
Christoph Hellwig 已提交
2580
	sta_id = iwl3945_get_sta_id(priv, hdr);
Z
Zhu Yi 已提交
2581
	if (sta_id == IWL_INVALID_STATION) {
2582 2583 2584 2585
		DECLARE_MAC_BUF(mac);

		IWL_DEBUG_DROP("Dropping - INVALID STATION: %s\n",
			       print_mac(mac, hdr->addr1));
Z
Zhu Yi 已提交
2586 2587 2588 2589 2590
		goto drop;
	}

	IWL_DEBUG_RATE("station Id %d\n", sta_id);

2591 2592
	if (ieee80211_is_data_qos(fc)) {
		qc = ieee80211_get_qos_ctl(hdr);
2593
		tid = qc[0] & 0xf;
Z
Zhu Yi 已提交
2594 2595 2596 2597 2598 2599 2600
		seq_number = priv->stations[sta_id].tid[tid].seq_number &
				IEEE80211_SCTL_SEQ;
		hdr->seq_ctrl = cpu_to_le16(seq_number) |
			(hdr->seq_ctrl &
				__constant_cpu_to_le16(IEEE80211_SCTL_FRAG));
		seq_number += 0x10;
	}
2601 2602

	/* Descriptor for chosen Tx queue */
Z
Zhu Yi 已提交
2603 2604 2605 2606 2607
	txq = &priv->txq[txq_id];
	q = &txq->q;

	spin_lock_irqsave(&priv->lock, flags);

2608
	/* Set up first empty TFD within this queue's circular TFD buffer */
2609
	tfd = &txq->bd[q->write_ptr];
Z
Zhu Yi 已提交
2610 2611
	memset(tfd, 0, sizeof(*tfd));
	control_flags = (u32 *) tfd;
2612
	idx = get_cmd_index(q, q->write_ptr, 0);
Z
Zhu Yi 已提交
2613

2614
	/* Set up driver data for this TFD */
C
Christoph Hellwig 已提交
2615
	memset(&(txq->txb[q->write_ptr]), 0, sizeof(struct iwl3945_tx_info));
2616
	txq->txb[q->write_ptr].skb[0] = skb;
2617 2618

	/* Init first empty entry in queue's array of Tx/cmd buffers */
Z
Zhu Yi 已提交
2619 2620 2621
	out_cmd = &txq->cmd[idx];
	memset(&out_cmd->hdr, 0, sizeof(out_cmd->hdr));
	memset(&out_cmd->cmd.tx, 0, sizeof(out_cmd->cmd.tx));
2622 2623 2624 2625 2626 2627 2628

	/*
	 * Set up the Tx-command (not MAC!) header.
	 * Store the chosen Tx queue and TFD index within the sequence field;
	 * after Tx, uCode's Tx response will return this value so driver can
	 * locate the frame within the tx queue and do post-tx processing.
	 */
Z
Zhu Yi 已提交
2629 2630
	out_cmd->hdr.cmd = REPLY_TX;
	out_cmd->hdr.sequence = cpu_to_le16((u16)(QUEUE_TO_SEQ(txq_id) |
2631
				INDEX_TO_SEQ(q->write_ptr)));
2632 2633

	/* Copy MAC header from skb into command buffer */
Z
Zhu Yi 已提交
2634 2635
	memcpy(out_cmd->cmd.tx.hdr, hdr, hdr_len);

2636 2637 2638 2639 2640 2641 2642 2643 2644
	/*
	 * Use the first empty entry in this queue's command buffer array
	 * to contain the Tx command and MAC header concatenated together
	 * (payload data will be in another buffer).
	 * Size of this varies, due to varying MAC header length.
	 * If end is not dword aligned, we'll have 2 extra bytes at the end
	 * of the MAC header (device reads on dword boundaries).
	 * We'll tell device about this padding later.
	 */
Z
Zhu Yi 已提交
2645
	len = priv->hw_setting.tx_cmd_len +
C
Christoph Hellwig 已提交
2646
		sizeof(struct iwl3945_cmd_header) + hdr_len;
Z
Zhu Yi 已提交
2647 2648 2649 2650 2651 2652 2653 2654 2655

	len_org = len;
	len = (len + 3) & ~3;

	if (len_org != len)
		len_org = 1;
	else
		len_org = 0;

2656 2657
	/* Physical address of this Tx command's header (not MAC header!),
	 * within command buffer array. */
C
Christoph Hellwig 已提交
2658 2659
	txcmd_phys = txq->dma_addr_cmd + sizeof(struct iwl3945_cmd) * idx +
		     offsetof(struct iwl3945_cmd, hdr);
Z
Zhu Yi 已提交
2660

2661 2662
	/* Add buffer containing Tx command and MAC(!) header to TFD's
	 * first entry */
C
Christoph Hellwig 已提交
2663
	iwl3945_hw_txq_attach_buf_to_tfd(priv, tfd, txcmd_phys, len);
Z
Zhu Yi 已提交
2664

2665
	if (info->control.hw_key)
2666
		iwl3945_build_tx_cmd_hwcrypto(priv, info, out_cmd, skb, 0);
Z
Zhu Yi 已提交
2667

2668 2669
	/* Set up TFD's 2nd entry to point directly to remainder of skb,
	 * if any (802.11 null frames have no payload). */
Z
Zhu Yi 已提交
2670 2671 2672 2673
	len = skb->len - hdr_len;
	if (len) {
		phys_addr = pci_map_single(priv->pci_dev, skb->data + hdr_len,
					   len, PCI_DMA_TODEVICE);
C
Christoph Hellwig 已提交
2674
		iwl3945_hw_txq_attach_buf_to_tfd(priv, tfd, phys_addr, len);
Z
Zhu Yi 已提交
2675 2676 2677
	}

	if (!len)
2678
		/* If there is no payload, then we use only one Tx buffer */
Z
Zhu Yi 已提交
2679 2680
		*control_flags = TFD_CTL_COUNT_SET(1);
	else
2681 2682
		/* Else use 2 buffers.
		 * Tell 3945 about any padding after MAC header */
Z
Zhu Yi 已提交
2683 2684 2685
		*control_flags = TFD_CTL_COUNT_SET(2) |
			TFD_CTL_PAD_SET(U32_PAD(len));

2686
	/* Total # bytes to be transmitted */
Z
Zhu Yi 已提交
2687 2688 2689 2690
	len = (u16)skb->len;
	out_cmd->cmd.tx.len = cpu_to_le16(len);

	/* TODO need this for burst mode later on */
2691
	iwl3945_build_tx_cmd_basic(priv, out_cmd, info, hdr, unicast, sta_id);
Z
Zhu Yi 已提交
2692 2693

	/* set is_hcca to 0; it probably will never be implemented */
2694
	iwl3945_hw_build_tx_cmd_rate(priv, out_cmd, info, hdr, sta_id, 0);
Z
Zhu Yi 已提交
2695 2696 2697 2698

	out_cmd->cmd.tx.tx_flags &= ~TX_CMD_FLG_ANT_A_MSK;
	out_cmd->cmd.tx.tx_flags &= ~TX_CMD_FLG_ANT_B_MSK;

2699
	if (!ieee80211_has_morefrags(hdr->frame_control)) {
Z
Zhu Yi 已提交
2700
		txq->need_update = 1;
2701
		if (qc)
Z
Zhu Yi 已提交
2702 2703 2704 2705 2706 2707
			priv->stations[sta_id].tid[tid].seq_number = seq_number;
	} else {
		wait_write_ptr = 1;
		txq->need_update = 0;
	}

C
Christoph Hellwig 已提交
2708
	iwl3945_print_hex_dump(IWL_DL_TX, out_cmd->cmd.payload,
Z
Zhu Yi 已提交
2709 2710
			   sizeof(out_cmd->cmd.tx));

C
Christoph Hellwig 已提交
2711
	iwl3945_print_hex_dump(IWL_DL_TX, (u8 *)out_cmd->cmd.tx.hdr,
2712
			   ieee80211_get_hdrlen(le16_to_cpu(fc)));
Z
Zhu Yi 已提交
2713

2714
	/* Tell device the write index *just past* this latest filled TFD */
T
Tomas Winkler 已提交
2715
	q->write_ptr = iwl_queue_inc_wrap(q->write_ptr, q->n_bd);
C
Christoph Hellwig 已提交
2716
	rc = iwl3945_tx_queue_update_write_ptr(priv, txq);
Z
Zhu Yi 已提交
2717 2718 2719 2720 2721
	spin_unlock_irqrestore(&priv->lock, flags);

	if (rc)
		return rc;

C
Christoph Hellwig 已提交
2722
	if ((iwl3945_queue_space(q) < q->high_mark)
Z
Zhu Yi 已提交
2723 2724 2725 2726
	    && priv->mac80211_registered) {
		if (wait_write_ptr) {
			spin_lock_irqsave(&priv->lock, flags);
			txq->need_update = 1;
C
Christoph Hellwig 已提交
2727
			iwl3945_tx_queue_update_write_ptr(priv, txq);
Z
Zhu Yi 已提交
2728 2729 2730
			spin_unlock_irqrestore(&priv->lock, flags);
		}

2731
		ieee80211_stop_queue(priv->hw, skb_get_queue_mapping(skb));
Z
Zhu Yi 已提交
2732 2733 2734 2735 2736 2737 2738 2739 2740 2741
	}

	return 0;

drop_unlock:
	spin_unlock_irqrestore(&priv->lock, flags);
drop:
	return -1;
}

C
Christoph Hellwig 已提交
2742
static void iwl3945_set_rate(struct iwl3945_priv *priv)
Z
Zhu Yi 已提交
2743
{
2744
	const struct ieee80211_supported_band *sband = NULL;
Z
Zhu Yi 已提交
2745 2746 2747
	struct ieee80211_rate *rate;
	int i;

2748 2749
	sband = iwl3945_get_band(priv, priv->band);
	if (!sband) {
2750 2751 2752
		IWL_ERROR("Failed to set rate: unable to get hw mode\n");
		return;
	}
Z
Zhu Yi 已提交
2753 2754 2755 2756

	priv->active_rate = 0;
	priv->active_rate_basic = 0;

2757 2758 2759 2760 2761 2762 2763 2764 2765 2766 2767
	IWL_DEBUG_RATE("Setting rates for %s GHz\n",
		       sband->band == IEEE80211_BAND_2GHZ ? "2.4" : "5");

	for (i = 0; i < sband->n_bitrates; i++) {
		rate = &sband->bitrates[i];
		if ((rate->hw_value < IWL_RATE_COUNT) &&
		    !(rate->flags & IEEE80211_CHAN_DISABLED)) {
			IWL_DEBUG_RATE("Adding rate index %d (plcp %d)\n",
				       rate->hw_value, iwl3945_rates[rate->hw_value].plcp);
			priv->active_rate |= (1 << rate->hw_value);
		}
Z
Zhu Yi 已提交
2768 2769 2770 2771 2772 2773 2774 2775 2776 2777 2778 2779 2780 2781 2782 2783 2784 2785 2786 2787 2788 2789 2790 2791 2792 2793 2794 2795
	}

	IWL_DEBUG_RATE("Set active_rate = %0x, active_rate_basic = %0x\n",
		       priv->active_rate, priv->active_rate_basic);

	/*
	 * If a basic rate is configured, then use it (adding IWL_RATE_1M_MASK)
	 * otherwise set it to the default of all CCK rates and 6, 12, 24 for
	 * OFDM
	 */
	if (priv->active_rate_basic & IWL_CCK_BASIC_RATES_MASK)
		priv->staging_rxon.cck_basic_rates =
		    ((priv->active_rate_basic &
		      IWL_CCK_RATES_MASK) >> IWL_FIRST_CCK_RATE) & 0xF;
	else
		priv->staging_rxon.cck_basic_rates =
		    (IWL_CCK_BASIC_RATES_MASK >> IWL_FIRST_CCK_RATE) & 0xF;

	if (priv->active_rate_basic & IWL_OFDM_BASIC_RATES_MASK)
		priv->staging_rxon.ofdm_basic_rates =
		    ((priv->active_rate_basic &
		      (IWL_OFDM_BASIC_RATES_MASK | IWL_RATE_6M_MASK)) >>
		      IWL_FIRST_OFDM_RATE) & 0xFF;
	else
		priv->staging_rxon.ofdm_basic_rates =
		   (IWL_OFDM_BASIC_RATES_MASK >> IWL_FIRST_OFDM_RATE) & 0xFF;
}

C
Christoph Hellwig 已提交
2796
static void iwl3945_radio_kill_sw(struct iwl3945_priv *priv, int disable_radio)
Z
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{
	unsigned long flags;

	if (!!disable_radio == test_bit(STATUS_RF_KILL_SW, &priv->status))
		return;

	IWL_DEBUG_RF_KILL("Manual SW RF KILL set to: RADIO %s\n",
			  disable_radio ? "OFF" : "ON");

	if (disable_radio) {
C
Christoph Hellwig 已提交
2807
		iwl3945_scan_cancel(priv);
Z
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		/* FIXME: This is a workaround for AP */
		if (priv->iw_mode != IEEE80211_IF_TYPE_AP) {
			spin_lock_irqsave(&priv->lock, flags);
C
Christoph Hellwig 已提交
2811
			iwl3945_write32(priv, CSR_UCODE_DRV_GP1_SET,
Z
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2812 2813
				    CSR_UCODE_SW_BIT_RFKILL);
			spin_unlock_irqrestore(&priv->lock, flags);
C
Christoph Hellwig 已提交
2814
			iwl3945_send_card_state(priv, CARD_STATE_CMD_DISABLE, 0);
Z
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2815 2816 2817 2818 2819 2820
			set_bit(STATUS_RF_KILL_SW, &priv->status);
		}
		return;
	}

	spin_lock_irqsave(&priv->lock, flags);
C
Christoph Hellwig 已提交
2821
	iwl3945_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
Z
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2822 2823 2824 2825 2826 2827 2828 2829

	clear_bit(STATUS_RF_KILL_SW, &priv->status);
	spin_unlock_irqrestore(&priv->lock, flags);

	/* wake up ucode */
	msleep(10);

	spin_lock_irqsave(&priv->lock, flags);
C
Christoph Hellwig 已提交
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	iwl3945_read32(priv, CSR_UCODE_DRV_GP1);
	if (!iwl3945_grab_nic_access(priv))
		iwl3945_release_nic_access(priv);
Z
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2833 2834 2835 2836 2837 2838 2839 2840
	spin_unlock_irqrestore(&priv->lock, flags);

	if (test_bit(STATUS_RF_KILL_HW, &priv->status)) {
		IWL_DEBUG_RF_KILL("Can not turn radio back on - "
				  "disabled by HW switch\n");
		return;
	}

2841 2842
	if (priv->is_open)
		queue_work(priv->workqueue, &priv->restart);
Z
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2843 2844 2845
	return;
}

C
Christoph Hellwig 已提交
2846
void iwl3945_set_decrypted_flag(struct iwl3945_priv *priv, struct sk_buff *skb,
Z
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2847 2848 2849 2850 2851 2852 2853 2854 2855 2856 2857 2858 2859 2860 2861 2862 2863 2864 2865 2866 2867 2868 2869 2870 2871 2872 2873 2874 2875 2876 2877
			    u32 decrypt_res, struct ieee80211_rx_status *stats)
{
	u16 fc =
	    le16_to_cpu(((struct ieee80211_hdr *)skb->data)->frame_control);

	if (priv->active_rxon.filter_flags & RXON_FILTER_DIS_DECRYPT_MSK)
		return;

	if (!(fc & IEEE80211_FCTL_PROTECTED))
		return;

	IWL_DEBUG_RX("decrypt_res:0x%x\n", decrypt_res);
	switch (decrypt_res & RX_RES_STATUS_SEC_TYPE_MSK) {
	case RX_RES_STATUS_SEC_TYPE_TKIP:
		if ((decrypt_res & RX_RES_STATUS_DECRYPT_TYPE_MSK) ==
		    RX_RES_STATUS_BAD_ICV_MIC)
			stats->flag |= RX_FLAG_MMIC_ERROR;
	case RX_RES_STATUS_SEC_TYPE_WEP:
	case RX_RES_STATUS_SEC_TYPE_CCMP:
		if ((decrypt_res & RX_RES_STATUS_DECRYPT_TYPE_MSK) ==
		    RX_RES_STATUS_DECRYPT_OK) {
			IWL_DEBUG_RX("hw decrypt successfully!!!\n");
			stats->flag |= RX_FLAG_DECRYPTED;
		}
		break;

	default:
		break;
	}
}

2878
#ifdef CONFIG_IWL3945_SPECTRUM_MEASUREMENT
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#include "iwl-spectrum.h"

#define BEACON_TIME_MASK_LOW	0x00FFFFFF
#define BEACON_TIME_MASK_HIGH	0xFF000000
#define TIME_UNIT		1024

/*
 * extended beacon time format
 * time in usec will be changed into a 32-bit value in 8:24 format
 * the high 1 byte is the beacon counts
 * the lower 3 bytes is the time in usec within one beacon interval
 */

C
Christoph Hellwig 已提交
2893
static u32 iwl3945_usecs_to_beacons(u32 usec, u32 beacon_interval)
Z
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2894 2895 2896 2897 2898 2899 2900 2901 2902 2903 2904 2905 2906 2907 2908 2909 2910 2911
{
	u32 quot;
	u32 rem;
	u32 interval = beacon_interval * 1024;

	if (!interval || !usec)
		return 0;

	quot = (usec / interval) & (BEACON_TIME_MASK_HIGH >> 24);
	rem = (usec % interval) & BEACON_TIME_MASK_LOW;

	return (quot << 24) + rem;
}

/* base is usually what we get from ucode with each received frame,
 * the same as HW timer counter counting down
 */

C
Christoph Hellwig 已提交
2912
static __le32 iwl3945_add_beacon_time(u32 base, u32 addon, u32 beacon_interval)
Z
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{
	u32 base_low = base & BEACON_TIME_MASK_LOW;
	u32 addon_low = addon & BEACON_TIME_MASK_LOW;
	u32 interval = beacon_interval * TIME_UNIT;
	u32 res = (base & BEACON_TIME_MASK_HIGH) +
	    (addon & BEACON_TIME_MASK_HIGH);

	if (base_low > addon_low)
		res += base_low - addon_low;
	else if (base_low < addon_low) {
		res += interval + base_low - addon_low;
		res += (1 << 24);
	} else
		res += (1 << 24);

	return cpu_to_le32(res);
}

C
Christoph Hellwig 已提交
2931
static int iwl3945_get_measurement(struct iwl3945_priv *priv,
Z
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2932 2933 2934
			       struct ieee80211_measurement_params *params,
			       u8 type)
{
C
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2935 2936 2937
	struct iwl3945_spectrum_cmd spectrum;
	struct iwl3945_rx_packet *res;
	struct iwl3945_host_cmd cmd = {
Z
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2938 2939 2940 2941 2942 2943 2944 2945 2946
		.id = REPLY_SPECTRUM_MEASUREMENT_CMD,
		.data = (void *)&spectrum,
		.meta.flags = CMD_WANT_SKB,
	};
	u32 add_time = le64_to_cpu(params->start_time);
	int rc;
	int spectrum_resp_status;
	int duration = le16_to_cpu(params->duration);

C
Christoph Hellwig 已提交
2947
	if (iwl3945_is_associated(priv))
Z
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2948
		add_time =
C
Christoph Hellwig 已提交
2949
		    iwl3945_usecs_to_beacons(
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2950 2951 2952 2953 2954 2955 2956 2957 2958 2959 2960 2961
			le64_to_cpu(params->start_time) - priv->last_tsf,
			le16_to_cpu(priv->rxon_timing.beacon_interval));

	memset(&spectrum, 0, sizeof(spectrum));

	spectrum.channel_count = cpu_to_le16(1);
	spectrum.flags =
	    RXON_FLG_TSF2HOST_MSK | RXON_FLG_ANT_A_MSK | RXON_FLG_DIS_DIV_MSK;
	spectrum.filter_flags = MEASUREMENT_FILTER_FLAG;
	cmd.len = sizeof(spectrum);
	spectrum.len = cpu_to_le16(cmd.len - sizeof(spectrum.len));

C
Christoph Hellwig 已提交
2962
	if (iwl3945_is_associated(priv))
Z
Zhu Yi 已提交
2963
		spectrum.start_time =
C
Christoph Hellwig 已提交
2964
		    iwl3945_add_beacon_time(priv->last_beacon_time,
Z
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2965 2966 2967 2968 2969 2970 2971 2972 2973 2974 2975 2976
				add_time,
				le16_to_cpu(priv->rxon_timing.beacon_interval));
	else
		spectrum.start_time = 0;

	spectrum.channels[0].duration = cpu_to_le32(duration * TIME_UNIT);
	spectrum.channels[0].channel = params->channel;
	spectrum.channels[0].type = type;
	if (priv->active_rxon.flags & RXON_FLG_BAND_24G_MSK)
		spectrum.flags |= RXON_FLG_BAND_24G_MSK |
		    RXON_FLG_AUTO_DETECT_MSK | RXON_FLG_TGG_PROTECT_MSK;

C
Christoph Hellwig 已提交
2977
	rc = iwl3945_send_cmd_sync(priv, &cmd);
Z
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2978 2979 2980
	if (rc)
		return rc;

C
Christoph Hellwig 已提交
2981
	res = (struct iwl3945_rx_packet *)cmd.meta.u.skb->data;
Z
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2982 2983 2984 2985 2986 2987 2988 2989 2990
	if (res->hdr.flags & IWL_CMD_FAILED_MSK) {
		IWL_ERROR("Bad return from REPLY_RX_ON_ASSOC command\n");
		rc = -EIO;
	}

	spectrum_resp_status = le16_to_cpu(res->u.spectrum.status);
	switch (spectrum_resp_status) {
	case 0:		/* Command will be handled */
		if (res->u.spectrum.id != 0xff) {
2991 2992
			IWL_DEBUG_INFO("Replaced existing measurement: %d\n",
						res->u.spectrum.id);
Z
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2993 2994 2995 2996 2997 2998 2999 3000 3001 3002 3003 3004 3005 3006 3007 3008 3009
			priv->measurement_status &= ~MEASUREMENT_READY;
		}
		priv->measurement_status |= MEASUREMENT_ACTIVE;
		rc = 0;
		break;

	case 1:		/* Command will not be handled */
		rc = -EAGAIN;
		break;
	}

	dev_kfree_skb_any(cmd.meta.u.skb);

	return rc;
}
#endif

C
Christoph Hellwig 已提交
3010 3011
static void iwl3945_rx_reply_alive(struct iwl3945_priv *priv,
			       struct iwl3945_rx_mem_buffer *rxb)
Z
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3012
{
C
Christoph Hellwig 已提交
3013 3014
	struct iwl3945_rx_packet *pkt = (void *)rxb->skb->data;
	struct iwl3945_alive_resp *palive;
Z
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3015 3016 3017 3018 3019 3020 3021 3022 3023 3024 3025 3026 3027
	struct delayed_work *pwork;

	palive = &pkt->u.alive_frame;

	IWL_DEBUG_INFO("Alive ucode status 0x%08X revision "
		       "0x%01X 0x%01X\n",
		       palive->is_valid, palive->ver_type,
		       palive->ver_subtype);

	if (palive->ver_subtype == INITIALIZE_SUBTYPE) {
		IWL_DEBUG_INFO("Initialization Alive received.\n");
		memcpy(&priv->card_alive_init,
		       &pkt->u.alive_frame,
C
Christoph Hellwig 已提交
3028
		       sizeof(struct iwl3945_init_alive_resp));
Z
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3029 3030 3031 3032
		pwork = &priv->init_alive_start;
	} else {
		IWL_DEBUG_INFO("Runtime Alive received.\n");
		memcpy(&priv->card_alive, &pkt->u.alive_frame,
C
Christoph Hellwig 已提交
3033
		       sizeof(struct iwl3945_alive_resp));
Z
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3034
		pwork = &priv->alive_start;
C
Christoph Hellwig 已提交
3035
		iwl3945_disable_events(priv);
Z
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3036 3037 3038 3039 3040 3041 3042 3043 3044 3045 3046
	}

	/* We delay the ALIVE response by 5ms to
	 * give the HW RF Kill time to activate... */
	if (palive->is_valid == UCODE_VALID_OK)
		queue_delayed_work(priv->workqueue, pwork,
				   msecs_to_jiffies(5));
	else
		IWL_WARNING("uCode did not respond OK.\n");
}

C
Christoph Hellwig 已提交
3047 3048
static void iwl3945_rx_reply_add_sta(struct iwl3945_priv *priv,
				 struct iwl3945_rx_mem_buffer *rxb)
Z
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3049
{
C
Christoph Hellwig 已提交
3050
	struct iwl3945_rx_packet *pkt = (void *)rxb->skb->data;
Z
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3051 3052 3053 3054 3055

	IWL_DEBUG_RX("Received REPLY_ADD_STA: 0x%02X\n", pkt->u.status);
	return;
}

C
Christoph Hellwig 已提交
3056 3057
static void iwl3945_rx_reply_error(struct iwl3945_priv *priv,
			       struct iwl3945_rx_mem_buffer *rxb)
Z
Zhu Yi 已提交
3058
{
C
Christoph Hellwig 已提交
3059
	struct iwl3945_rx_packet *pkt = (void *)rxb->skb->data;
Z
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3060 3061 3062 3063 3064 3065 3066 3067 3068 3069 3070 3071

	IWL_ERROR("Error Reply type 0x%08X cmd %s (0x%02X) "
		"seq 0x%04X ser 0x%08X\n",
		le32_to_cpu(pkt->u.err_resp.error_type),
		get_cmd_string(pkt->u.err_resp.cmd_id),
		pkt->u.err_resp.cmd_id,
		le16_to_cpu(pkt->u.err_resp.bad_cmd_seq_num),
		le32_to_cpu(pkt->u.err_resp.error_info));
}

#define TX_STATUS_ENTRY(x) case TX_STATUS_FAIL_ ## x: return #x

C
Christoph Hellwig 已提交
3072
static void iwl3945_rx_csa(struct iwl3945_priv *priv, struct iwl3945_rx_mem_buffer *rxb)
Z
Zhu Yi 已提交
3073
{
C
Christoph Hellwig 已提交
3074 3075 3076
	struct iwl3945_rx_packet *pkt = (void *)rxb->skb->data;
	struct iwl3945_rxon_cmd *rxon = (void *)&priv->active_rxon;
	struct iwl3945_csa_notification *csa = &(pkt->u.csa_notif);
Z
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3077 3078 3079 3080 3081 3082
	IWL_DEBUG_11H("CSA notif: channel %d, status %d\n",
		      le16_to_cpu(csa->channel), le32_to_cpu(csa->status));
	rxon->channel = csa->channel;
	priv->staging_rxon.channel = csa->channel;
}

C
Christoph Hellwig 已提交
3083 3084
static void iwl3945_rx_spectrum_measure_notif(struct iwl3945_priv *priv,
					  struct iwl3945_rx_mem_buffer *rxb)
Z
Zhu Yi 已提交
3085
{
3086
#ifdef CONFIG_IWL3945_SPECTRUM_MEASUREMENT
C
Christoph Hellwig 已提交
3087 3088
	struct iwl3945_rx_packet *pkt = (void *)rxb->skb->data;
	struct iwl3945_spectrum_notification *report = &(pkt->u.spectrum_notif);
Z
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3089 3090 3091 3092 3093 3094 3095 3096 3097 3098 3099 3100

	if (!report->state) {
		IWL_DEBUG(IWL_DL_11H | IWL_DL_INFO,
			  "Spectrum Measure Notification: Start\n");
		return;
	}

	memcpy(&priv->measure_report, report, sizeof(*report));
	priv->measurement_status |= MEASUREMENT_READY;
#endif
}

C
Christoph Hellwig 已提交
3101 3102
static void iwl3945_rx_pm_sleep_notif(struct iwl3945_priv *priv,
				  struct iwl3945_rx_mem_buffer *rxb)
Z
Zhu Yi 已提交
3103
{
3104
#ifdef CONFIG_IWL3945_DEBUG
C
Christoph Hellwig 已提交
3105 3106
	struct iwl3945_rx_packet *pkt = (void *)rxb->skb->data;
	struct iwl3945_sleep_notification *sleep = &(pkt->u.sleep_notif);
Z
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3107 3108 3109 3110 3111
	IWL_DEBUG_RX("sleep mode: %d, src: %d\n",
		     sleep->pm_sleep_mode, sleep->pm_wakeup_src);
#endif
}

C
Christoph Hellwig 已提交
3112 3113
static void iwl3945_rx_pm_debug_statistics_notif(struct iwl3945_priv *priv,
					     struct iwl3945_rx_mem_buffer *rxb)
Z
Zhu Yi 已提交
3114
{
C
Christoph Hellwig 已提交
3115
	struct iwl3945_rx_packet *pkt = (void *)rxb->skb->data;
Z
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3116 3117 3118
	IWL_DEBUG_RADIO("Dumping %d bytes of unhandled "
			"notification for %s:\n",
			le32_to_cpu(pkt->len), get_cmd_string(pkt->hdr.cmd));
C
Christoph Hellwig 已提交
3119
	iwl3945_print_hex_dump(IWL_DL_RADIO, pkt->u.raw, le32_to_cpu(pkt->len));
Z
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3120 3121
}

C
Christoph Hellwig 已提交
3122
static void iwl3945_bg_beacon_update(struct work_struct *work)
Z
Zhu Yi 已提交
3123
{
C
Christoph Hellwig 已提交
3124 3125
	struct iwl3945_priv *priv =
		container_of(work, struct iwl3945_priv, beacon_update);
Z
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3126 3127 3128
	struct sk_buff *beacon;

	/* Pull updated AP beacon from mac80211. will fail if not in AP mode */
3129
	beacon = ieee80211_beacon_get(priv->hw, priv->vif);
Z
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3130 3131 3132 3133 3134 3135 3136 3137 3138 3139 3140 3141 3142 3143

	if (!beacon) {
		IWL_ERROR("update beacon failed\n");
		return;
	}

	mutex_lock(&priv->mutex);
	/* new beacon skb is allocated every time; dispose previous.*/
	if (priv->ibss_beacon)
		dev_kfree_skb(priv->ibss_beacon);

	priv->ibss_beacon = beacon;
	mutex_unlock(&priv->mutex);

C
Christoph Hellwig 已提交
3144
	iwl3945_send_beacon_cmd(priv);
Z
Zhu Yi 已提交
3145 3146
}

C
Christoph Hellwig 已提交
3147 3148
static void iwl3945_rx_beacon_notif(struct iwl3945_priv *priv,
				struct iwl3945_rx_mem_buffer *rxb)
Z
Zhu Yi 已提交
3149
{
3150
#ifdef CONFIG_IWL3945_DEBUG
C
Christoph Hellwig 已提交
3151 3152
	struct iwl3945_rx_packet *pkt = (void *)rxb->skb->data;
	struct iwl3945_beacon_notif *beacon = &(pkt->u.beacon_status);
Z
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3153 3154 3155 3156 3157 3158 3159 3160 3161 3162 3163 3164 3165 3166 3167 3168 3169
	u8 rate = beacon->beacon_notify_hdr.rate;

	IWL_DEBUG_RX("beacon status %x retries %d iss %d "
		"tsf %d %d rate %d\n",
		le32_to_cpu(beacon->beacon_notify_hdr.status) & TX_STATUS_MSK,
		beacon->beacon_notify_hdr.failure_frame,
		le32_to_cpu(beacon->ibss_mgr_status),
		le32_to_cpu(beacon->high_tsf),
		le32_to_cpu(beacon->low_tsf), rate);
#endif

	if ((priv->iw_mode == IEEE80211_IF_TYPE_AP) &&
	    (!test_bit(STATUS_EXIT_PENDING, &priv->status)))
		queue_work(priv->workqueue, &priv->beacon_update);
}

/* Service response to REPLY_SCAN_CMD (0x80) */
C
Christoph Hellwig 已提交
3170 3171
static void iwl3945_rx_reply_scan(struct iwl3945_priv *priv,
			      struct iwl3945_rx_mem_buffer *rxb)
Z
Zhu Yi 已提交
3172
{
3173
#ifdef CONFIG_IWL3945_DEBUG
C
Christoph Hellwig 已提交
3174 3175 3176
	struct iwl3945_rx_packet *pkt = (void *)rxb->skb->data;
	struct iwl3945_scanreq_notification *notif =
	    (struct iwl3945_scanreq_notification *)pkt->u.raw;
Z
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	IWL_DEBUG_RX("Scan request status = 0x%x\n", notif->status);
#endif
}

/* Service SCAN_START_NOTIFICATION (0x82) */
C
Christoph Hellwig 已提交
3183 3184
static void iwl3945_rx_scan_start_notif(struct iwl3945_priv *priv,
				    struct iwl3945_rx_mem_buffer *rxb)
Z
Zhu Yi 已提交
3185
{
C
Christoph Hellwig 已提交
3186 3187 3188
	struct iwl3945_rx_packet *pkt = (void *)rxb->skb->data;
	struct iwl3945_scanstart_notification *notif =
	    (struct iwl3945_scanstart_notification *)pkt->u.raw;
Z
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3189 3190 3191 3192 3193 3194 3195 3196 3197 3198 3199
	priv->scan_start_tsf = le32_to_cpu(notif->tsf_low);
	IWL_DEBUG_SCAN("Scan start: "
		       "%d [802.11%s] "
		       "(TSF: 0x%08X:%08X) - %d (beacon timer %u)\n",
		       notif->channel,
		       notif->band ? "bg" : "a",
		       notif->tsf_high,
		       notif->tsf_low, notif->status, notif->beacon_timer);
}

/* Service SCAN_RESULTS_NOTIFICATION (0x83) */
C
Christoph Hellwig 已提交
3200 3201
static void iwl3945_rx_scan_results_notif(struct iwl3945_priv *priv,
				      struct iwl3945_rx_mem_buffer *rxb)
Z
Zhu Yi 已提交
3202
{
C
Christoph Hellwig 已提交
3203 3204 3205
	struct iwl3945_rx_packet *pkt = (void *)rxb->skb->data;
	struct iwl3945_scanresults_notification *notif =
	    (struct iwl3945_scanresults_notification *)pkt->u.raw;
Z
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3206 3207 3208 3209 3210 3211 3212 3213 3214 3215 3216 3217 3218 3219 3220

	IWL_DEBUG_SCAN("Scan ch.res: "
		       "%d [802.11%s] "
		       "(TSF: 0x%08X:%08X) - %d "
		       "elapsed=%lu usec (%dms since last)\n",
		       notif->channel,
		       notif->band ? "bg" : "a",
		       le32_to_cpu(notif->tsf_high),
		       le32_to_cpu(notif->tsf_low),
		       le32_to_cpu(notif->statistics[0]),
		       le32_to_cpu(notif->tsf_low) - priv->scan_start_tsf,
		       jiffies_to_msecs(elapsed_jiffies
					(priv->last_scan_jiffies, jiffies)));

	priv->last_scan_jiffies = jiffies;
3221
	priv->next_scan_jiffies = 0;
Z
Zhu Yi 已提交
3222 3223 3224
}

/* Service SCAN_COMPLETE_NOTIFICATION (0x84) */
C
Christoph Hellwig 已提交
3225 3226
static void iwl3945_rx_scan_complete_notif(struct iwl3945_priv *priv,
				       struct iwl3945_rx_mem_buffer *rxb)
Z
Zhu Yi 已提交
3227
{
C
Christoph Hellwig 已提交
3228 3229
	struct iwl3945_rx_packet *pkt = (void *)rxb->skb->data;
	struct iwl3945_scancomplete_notification *scan_notif = (void *)pkt->u.raw;
Z
Zhu Yi 已提交
3230 3231 3232 3233 3234 3235 3236 3237 3238 3239 3240 3241 3242

	IWL_DEBUG_SCAN("Scan complete: %d channels (TSF 0x%08X:%08X) - %d\n",
		       scan_notif->scanned_channels,
		       scan_notif->tsf_low,
		       scan_notif->tsf_high, scan_notif->status);

	/* The HW is no longer scanning */
	clear_bit(STATUS_SCAN_HW, &priv->status);

	/* The scan completion notification came in, so kill that timer... */
	cancel_delayed_work(&priv->scan_check);

	IWL_DEBUG_INFO("Scan pass on %sGHz took %dms\n",
3243 3244
		       (priv->scan_bands & BIT(IEEE80211_BAND_2GHZ)) ?
							"2.4" : "5.2",
Z
Zhu Yi 已提交
3245 3246 3247
		       jiffies_to_msecs(elapsed_jiffies
					(priv->scan_pass_start, jiffies)));

3248 3249 3250 3251 3252 3253 3254
	/* Remove this scanned band from the list of pending
	 * bands to scan, band G precedes A in order of scanning
	 * as seen in iwl3945_bg_request_scan */
	if (priv->scan_bands & BIT(IEEE80211_BAND_2GHZ))
		priv->scan_bands &= ~BIT(IEEE80211_BAND_2GHZ);
	else if (priv->scan_bands &  BIT(IEEE80211_BAND_5GHZ))
		priv->scan_bands &= ~BIT(IEEE80211_BAND_5GHZ);
Z
Zhu Yi 已提交
3255 3256 3257 3258 3259 3260 3261 3262 3263 3264 3265 3266 3267 3268

	/* If a request to abort was given, or the scan did not succeed
	 * then we reset the scan state machine and terminate,
	 * re-queuing another scan if one has been requested */
	if (test_bit(STATUS_SCAN_ABORTING, &priv->status)) {
		IWL_DEBUG_INFO("Aborted scan completed.\n");
		clear_bit(STATUS_SCAN_ABORTING, &priv->status);
	} else {
		/* If there are more bands on this scan pass reschedule */
		if (priv->scan_bands > 0)
			goto reschedule;
	}

	priv->last_scan_jiffies = jiffies;
3269
	priv->next_scan_jiffies = 0;
Z
Zhu Yi 已提交
3270 3271 3272 3273 3274 3275 3276 3277 3278 3279 3280 3281 3282 3283 3284 3285 3286 3287
	IWL_DEBUG_INFO("Setting scan to off\n");

	clear_bit(STATUS_SCANNING, &priv->status);

	IWL_DEBUG_INFO("Scan took %dms\n",
		jiffies_to_msecs(elapsed_jiffies(priv->scan_start, jiffies)));

	queue_work(priv->workqueue, &priv->scan_completed);

	return;

reschedule:
	priv->scan_pass_start = jiffies;
	queue_work(priv->workqueue, &priv->request_scan);
}

/* Handle notification from uCode that card's power state is changing
 * due to software, hardware, or critical temperature RFKILL */
C
Christoph Hellwig 已提交
3288 3289
static void iwl3945_rx_card_state_notif(struct iwl3945_priv *priv,
				    struct iwl3945_rx_mem_buffer *rxb)
Z
Zhu Yi 已提交
3290
{
C
Christoph Hellwig 已提交
3291
	struct iwl3945_rx_packet *pkt = (void *)rxb->skb->data;
Z
Zhu Yi 已提交
3292 3293 3294 3295 3296 3297 3298
	u32 flags = le32_to_cpu(pkt->u.card_state_notif.flags);
	unsigned long status = priv->status;

	IWL_DEBUG_RF_KILL("Card state received: HW:%s SW:%s\n",
			  (flags & HW_CARD_DISABLED) ? "Kill" : "On",
			  (flags & SW_CARD_DISABLED) ? "Kill" : "On");

C
Christoph Hellwig 已提交
3299
	iwl3945_write32(priv, CSR_UCODE_DRV_GP1_SET,
Z
Zhu Yi 已提交
3300 3301 3302 3303 3304 3305 3306 3307 3308 3309 3310 3311 3312
		    CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED);

	if (flags & HW_CARD_DISABLED)
		set_bit(STATUS_RF_KILL_HW, &priv->status);
	else
		clear_bit(STATUS_RF_KILL_HW, &priv->status);


	if (flags & SW_CARD_DISABLED)
		set_bit(STATUS_RF_KILL_SW, &priv->status);
	else
		clear_bit(STATUS_RF_KILL_SW, &priv->status);

C
Christoph Hellwig 已提交
3313
	iwl3945_scan_cancel(priv);
Z
Zhu Yi 已提交
3314 3315 3316 3317 3318 3319 3320 3321 3322 3323 3324

	if ((test_bit(STATUS_RF_KILL_HW, &status) !=
	     test_bit(STATUS_RF_KILL_HW, &priv->status)) ||
	    (test_bit(STATUS_RF_KILL_SW, &status) !=
	     test_bit(STATUS_RF_KILL_SW, &priv->status)))
		queue_work(priv->workqueue, &priv->rf_kill);
	else
		wake_up_interruptible(&priv->wait_command_queue);
}

/**
C
Christoph Hellwig 已提交
3325
 * iwl3945_setup_rx_handlers - Initialize Rx handler callbacks
Z
Zhu Yi 已提交
3326 3327 3328 3329 3330 3331 3332
 *
 * Setup the RX handlers for each of the reply types sent from the uCode
 * to the host.
 *
 * This function chains into the hardware specific files for them to setup
 * any hardware specific handlers as well.
 */
C
Christoph Hellwig 已提交
3333
static void iwl3945_setup_rx_handlers(struct iwl3945_priv *priv)
Z
Zhu Yi 已提交
3334
{
C
Christoph Hellwig 已提交
3335 3336 3337 3338
	priv->rx_handlers[REPLY_ALIVE] = iwl3945_rx_reply_alive;
	priv->rx_handlers[REPLY_ADD_STA] = iwl3945_rx_reply_add_sta;
	priv->rx_handlers[REPLY_ERROR] = iwl3945_rx_reply_error;
	priv->rx_handlers[CHANNEL_SWITCH_NOTIFICATION] = iwl3945_rx_csa;
Z
Zhu Yi 已提交
3339
	priv->rx_handlers[SPECTRUM_MEASURE_NOTIFICATION] =
C
Christoph Hellwig 已提交
3340 3341
	    iwl3945_rx_spectrum_measure_notif;
	priv->rx_handlers[PM_SLEEP_NOTIFICATION] = iwl3945_rx_pm_sleep_notif;
Z
Zhu Yi 已提交
3342
	priv->rx_handlers[PM_DEBUG_STATISTIC_NOTIFIC] =
C
Christoph Hellwig 已提交
3343 3344
	    iwl3945_rx_pm_debug_statistics_notif;
	priv->rx_handlers[BEACON_NOTIFICATION] = iwl3945_rx_beacon_notif;
Z
Zhu Yi 已提交
3345

3346 3347 3348 3349
	/*
	 * The same handler is used for both the REPLY to a discrete
	 * statistics request from the host as well as for the periodic
	 * statistics notifications (after received beacons) from the uCode.
Z
Zhu Yi 已提交
3350
	 */
C
Christoph Hellwig 已提交
3351 3352
	priv->rx_handlers[REPLY_STATISTICS_CMD] = iwl3945_hw_rx_statistics;
	priv->rx_handlers[STATISTICS_NOTIFICATION] = iwl3945_hw_rx_statistics;
Z
Zhu Yi 已提交
3353

C
Christoph Hellwig 已提交
3354 3355
	priv->rx_handlers[REPLY_SCAN_CMD] = iwl3945_rx_reply_scan;
	priv->rx_handlers[SCAN_START_NOTIFICATION] = iwl3945_rx_scan_start_notif;
Z
Zhu Yi 已提交
3356
	priv->rx_handlers[SCAN_RESULTS_NOTIFICATION] =
C
Christoph Hellwig 已提交
3357
	    iwl3945_rx_scan_results_notif;
Z
Zhu Yi 已提交
3358
	priv->rx_handlers[SCAN_COMPLETE_NOTIFICATION] =
C
Christoph Hellwig 已提交
3359 3360
	    iwl3945_rx_scan_complete_notif;
	priv->rx_handlers[CARD_STATE_NOTIFICATION] = iwl3945_rx_card_state_notif;
Z
Zhu Yi 已提交
3361

3362
	/* Set up hardware specific Rx handlers */
C
Christoph Hellwig 已提交
3363
	iwl3945_hw_rx_handler_setup(priv);
Z
Zhu Yi 已提交
3364 3365
}

3366 3367 3368 3369 3370 3371 3372 3373 3374 3375 3376 3377 3378 3379 3380 3381 3382 3383 3384 3385 3386 3387 3388 3389 3390 3391 3392 3393 3394 3395 3396 3397
/**
 * iwl3945_cmd_queue_reclaim - Reclaim CMD queue entries
 * When FW advances 'R' index, all entries between old and new 'R' index
 * need to be reclaimed.
 */
static void iwl3945_cmd_queue_reclaim(struct iwl3945_priv *priv,
				      int txq_id, int index)
{
	struct iwl3945_tx_queue *txq = &priv->txq[txq_id];
	struct iwl3945_queue *q = &txq->q;
	int nfreed = 0;

	if ((index >= q->n_bd) || (iwl3945_x2_queue_used(q, index) == 0)) {
		IWL_ERROR("Read index for DMA queue txq id (%d), index %d, "
			  "is out of range [0-%d] %d %d.\n", txq_id,
			  index, q->n_bd, q->write_ptr, q->read_ptr);
		return;
	}

	for (index = iwl_queue_inc_wrap(index, q->n_bd); q->read_ptr != index;
		q->read_ptr = iwl_queue_inc_wrap(q->read_ptr, q->n_bd)) {
		if (nfreed > 1) {
			IWL_ERROR("HCMD skipped: index (%d) %d %d\n", index,
					q->write_ptr, q->read_ptr);
			queue_work(priv->workqueue, &priv->restart);
			break;
		}
		nfreed++;
	}
}


Z
Zhu Yi 已提交
3398
/**
C
Christoph Hellwig 已提交
3399
 * iwl3945_tx_cmd_complete - Pull unused buffers off the queue and reclaim them
Z
Zhu Yi 已提交
3400 3401 3402 3403 3404 3405
 * @rxb: Rx buffer to reclaim
 *
 * If an Rx buffer has an async callback associated with it the callback
 * will be executed.  The attached skb (if present) will only be freed
 * if the callback returns 1
 */
C
Christoph Hellwig 已提交
3406 3407
static void iwl3945_tx_cmd_complete(struct iwl3945_priv *priv,
				struct iwl3945_rx_mem_buffer *rxb)
Z
Zhu Yi 已提交
3408
{
C
Christoph Hellwig 已提交
3409
	struct iwl3945_rx_packet *pkt = (struct iwl3945_rx_packet *)rxb->skb->data;
Z
Zhu Yi 已提交
3410 3411 3412 3413 3414
	u16 sequence = le16_to_cpu(pkt->hdr.sequence);
	int txq_id = SEQ_TO_QUEUE(sequence);
	int index = SEQ_TO_INDEX(sequence);
	int huge = sequence & SEQ_HUGE_FRAME;
	int cmd_index;
C
Christoph Hellwig 已提交
3415
	struct iwl3945_cmd *cmd;
Z
Zhu Yi 已提交
3416 3417 3418 3419 3420 3421 3422 3423 3424 3425 3426 3427 3428 3429

	BUG_ON(txq_id != IWL_CMD_QUEUE_NUM);

	cmd_index = get_cmd_index(&priv->txq[IWL_CMD_QUEUE_NUM].q, index, huge);
	cmd = &priv->txq[IWL_CMD_QUEUE_NUM].cmd[cmd_index];

	/* Input error checking is done when commands are added to queue. */
	if (cmd->meta.flags & CMD_WANT_SKB) {
		cmd->meta.source->u.skb = rxb->skb;
		rxb->skb = NULL;
	} else if (cmd->meta.u.callback &&
		   !cmd->meta.u.callback(priv, cmd, rxb->skb))
		rxb->skb = NULL;

3430
	iwl3945_cmd_queue_reclaim(priv, txq_id, index);
Z
Zhu Yi 已提交
3431 3432 3433 3434 3435 3436 3437 3438 3439 3440 3441 3442 3443 3444 3445 3446 3447 3448 3449 3450 3451 3452 3453 3454 3455 3456 3457 3458 3459

	if (!(cmd->meta.flags & CMD_ASYNC)) {
		clear_bit(STATUS_HCMD_ACTIVE, &priv->status);
		wake_up_interruptible(&priv->wait_command_queue);
	}
}

/************************** RX-FUNCTIONS ****************************/
/*
 * Rx theory of operation
 *
 * The host allocates 32 DMA target addresses and passes the host address
 * to the firmware at register IWL_RFDS_TABLE_LOWER + N * RFD_SIZE where N is
 * 0 to 31
 *
 * Rx Queue Indexes
 * The host/firmware share two index registers for managing the Rx buffers.
 *
 * The READ index maps to the first position that the firmware may be writing
 * to -- the driver can read up to (but not including) this position and get
 * good data.
 * The READ index is managed by the firmware once the card is enabled.
 *
 * The WRITE index maps to the last position the driver has read from -- the
 * position preceding WRITE is the last slot the firmware can place a packet.
 *
 * The queue is empty (no good data) if WRITE = READ - 1, and is full if
 * WRITE = READ.
 *
3460
 * During initialization, the host sets up the READ queue position to the first
Z
Zhu Yi 已提交
3461 3462
 * INDEX position, and WRITE to the last (READ - 1 wrapped)
 *
3463
 * When the firmware places a packet in a buffer, it will advance the READ index
Z
Zhu Yi 已提交
3464 3465 3466 3467 3468 3469 3470
 * and fire the RX interrupt.  The driver can then query the READ index and
 * process as many packets as possible, moving the WRITE index forward as it
 * resets the Rx queue buffers with new memory.
 *
 * The management in the driver is as follows:
 * + A list of pre-allocated SKBs is stored in iwl->rxq->rx_free.  When
 *   iwl->rxq->free_count drops to or below RX_LOW_WATERMARK, work is scheduled
3471
 *   to replenish the iwl->rxq->rx_free.
C
Christoph Hellwig 已提交
3472
 * + In iwl3945_rx_replenish (scheduled) if 'processed' != 'read' then the
Z
Zhu Yi 已提交
3473 3474 3475 3476 3477 3478 3479 3480 3481 3482 3483 3484
 *   iwl->rxq is replenished and the READ INDEX is updated (updating the
 *   'processed' and 'read' driver indexes as well)
 * + A received packet is processed and handed to the kernel network stack,
 *   detached from the iwl->rxq.  The driver 'processed' index is updated.
 * + The Host/Firmware iwl->rxq is replenished at tasklet time from the rx_free
 *   list. If there are no allocated buffers in iwl->rxq->rx_free, the READ
 *   INDEX is not incremented and iwl->status(RX_STALLED) is set.  If there
 *   were enough free buffers and RX_STALLED is set it is cleared.
 *
 *
 * Driver sequence:
 *
3485 3486
 * iwl3945_rx_queue_alloc()   Allocates rx_free
 * iwl3945_rx_replenish()     Replenishes rx_free list from rx_used, and calls
C
Christoph Hellwig 已提交
3487
 *                            iwl3945_rx_queue_restock
3488
 * iwl3945_rx_queue_restock() Moves available buffers from rx_free into Rx
Z
Zhu Yi 已提交
3489 3490
 *                            queue, updates firmware pointers, and updates
 *                            the WRITE index.  If insufficient rx_free buffers
C
Christoph Hellwig 已提交
3491
 *                            are available, schedules iwl3945_rx_replenish
Z
Zhu Yi 已提交
3492 3493
 *
 * -- enable interrupts --
3494
 * ISR - iwl3945_rx()         Detach iwl3945_rx_mem_buffers from pool up to the
Z
Zhu Yi 已提交
3495 3496
 *                            READ INDEX, detaching the SKB from the pool.
 *                            Moves the packet buffer from queue to rx_used.
C
Christoph Hellwig 已提交
3497
 *                            Calls iwl3945_rx_queue_restock to refill any empty
Z
Zhu Yi 已提交
3498 3499 3500 3501 3502 3503
 *                            slots.
 * ...
 *
 */

/**
C
Christoph Hellwig 已提交
3504
 * iwl3945_rx_queue_space - Return number of free slots available in queue.
Z
Zhu Yi 已提交
3505
 */
C
Christoph Hellwig 已提交
3506
static int iwl3945_rx_queue_space(const struct iwl3945_rx_queue *q)
Z
Zhu Yi 已提交
3507 3508 3509 3510 3511 3512 3513 3514 3515 3516 3517 3518
{
	int s = q->read - q->write;
	if (s <= 0)
		s += RX_QUEUE_SIZE;
	/* keep some buffer to not confuse full and empty queue */
	s -= 2;
	if (s < 0)
		s = 0;
	return s;
}

/**
C
Christoph Hellwig 已提交
3519
 * iwl3945_rx_queue_update_write_ptr - Update the write pointer for the RX queue
Z
Zhu Yi 已提交
3520
 */
C
Christoph Hellwig 已提交
3521
int iwl3945_rx_queue_update_write_ptr(struct iwl3945_priv *priv, struct iwl3945_rx_queue *q)
Z
Zhu Yi 已提交
3522 3523 3524 3525 3526 3527 3528 3529 3530 3531
{
	u32 reg = 0;
	int rc = 0;
	unsigned long flags;

	spin_lock_irqsave(&q->lock, flags);

	if (q->need_update == 0)
		goto exit_unlock;

3532
	/* If power-saving is in use, make sure device is awake */
Z
Zhu Yi 已提交
3533
	if (test_bit(STATUS_POWER_PMI, &priv->status)) {
C
Christoph Hellwig 已提交
3534
		reg = iwl3945_read32(priv, CSR_UCODE_DRV_GP1);
Z
Zhu Yi 已提交
3535 3536

		if (reg & CSR_UCODE_DRV_GP1_BIT_MAC_SLEEP) {
C
Christoph Hellwig 已提交
3537
			iwl3945_set_bit(priv, CSR_GP_CNTRL,
Z
Zhu Yi 已提交
3538 3539 3540 3541
				    CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ);
			goto exit_unlock;
		}

C
Christoph Hellwig 已提交
3542
		rc = iwl3945_grab_nic_access(priv);
Z
Zhu Yi 已提交
3543 3544 3545
		if (rc)
			goto exit_unlock;

3546
		/* Device expects a multiple of 8 */
C
Christoph Hellwig 已提交
3547
		iwl3945_write_direct32(priv, FH_RSCSR_CHNL0_WPTR,
Z
Zhu Yi 已提交
3548
				     q->write & ~0x7);
C
Christoph Hellwig 已提交
3549
		iwl3945_release_nic_access(priv);
3550 3551

	/* Else device is assumed to be awake */
Z
Zhu Yi 已提交
3552
	} else
3553
		/* Device expects a multiple of 8 */
C
Christoph Hellwig 已提交
3554
		iwl3945_write32(priv, FH_RSCSR_CHNL0_WPTR, q->write & ~0x7);
Z
Zhu Yi 已提交
3555 3556 3557 3558 3559 3560 3561 3562 3563 3564


	q->need_update = 0;

 exit_unlock:
	spin_unlock_irqrestore(&q->lock, flags);
	return rc;
}

/**
3565
 * iwl3945_dma_addr2rbd_ptr - convert a DMA address to a uCode read buffer ptr
Z
Zhu Yi 已提交
3566
 */
C
Christoph Hellwig 已提交
3567
static inline __le32 iwl3945_dma_addr2rbd_ptr(struct iwl3945_priv *priv,
Z
Zhu Yi 已提交
3568 3569 3570 3571 3572 3573
					  dma_addr_t dma_addr)
{
	return cpu_to_le32((u32)dma_addr);
}

/**
C
Christoph Hellwig 已提交
3574
 * iwl3945_rx_queue_restock - refill RX queue from pre-allocated pool
Z
Zhu Yi 已提交
3575
 *
3576
 * If there are slots in the RX queue that need to be restocked,
Z
Zhu Yi 已提交
3577
 * and we have free pre-allocated buffers, fill the ranks as much
3578
 * as we can, pulling from rx_free.
Z
Zhu Yi 已提交
3579 3580 3581 3582 3583
 *
 * This moves the 'write' index forward to catch up with 'processed', and
 * also updates the memory address in the firmware to reference the new
 * target buffer.
 */
C
Christoph Hellwig 已提交
3584
static int iwl3945_rx_queue_restock(struct iwl3945_priv *priv)
Z
Zhu Yi 已提交
3585
{
C
Christoph Hellwig 已提交
3586
	struct iwl3945_rx_queue *rxq = &priv->rxq;
Z
Zhu Yi 已提交
3587
	struct list_head *element;
C
Christoph Hellwig 已提交
3588
	struct iwl3945_rx_mem_buffer *rxb;
Z
Zhu Yi 已提交
3589 3590 3591 3592 3593
	unsigned long flags;
	int write, rc;

	spin_lock_irqsave(&rxq->lock, flags);
	write = rxq->write & ~0x7;
C
Christoph Hellwig 已提交
3594
	while ((iwl3945_rx_queue_space(rxq) > 0) && (rxq->free_count)) {
3595
		/* Get next free Rx buffer, remove from free list */
Z
Zhu Yi 已提交
3596
		element = rxq->rx_free.next;
C
Christoph Hellwig 已提交
3597
		rxb = list_entry(element, struct iwl3945_rx_mem_buffer, list);
Z
Zhu Yi 已提交
3598
		list_del(element);
3599 3600

		/* Point to Rx buffer via next RBD in circular buffer */
C
Christoph Hellwig 已提交
3601
		rxq->bd[rxq->write] = iwl3945_dma_addr2rbd_ptr(priv, rxb->dma_addr);
Z
Zhu Yi 已提交
3602 3603 3604 3605 3606 3607 3608 3609 3610 3611 3612
		rxq->queue[rxq->write] = rxb;
		rxq->write = (rxq->write + 1) & RX_QUEUE_MASK;
		rxq->free_count--;
	}
	spin_unlock_irqrestore(&rxq->lock, flags);
	/* If the pre-allocated buffer pool is dropping low, schedule to
	 * refill it */
	if (rxq->free_count <= RX_LOW_WATERMARK)
		queue_work(priv->workqueue, &priv->rx_replenish);


3613 3614
	/* If we've added more space for the firmware to place data, tell it.
	 * Increment device's write pointer in multiples of 8. */
Z
Zhu Yi 已提交
3615 3616 3617 3618 3619
	if ((write != (rxq->write & ~0x7))
	    || (abs(rxq->write - rxq->read) > 7)) {
		spin_lock_irqsave(&rxq->lock, flags);
		rxq->need_update = 1;
		spin_unlock_irqrestore(&rxq->lock, flags);
C
Christoph Hellwig 已提交
3620
		rc = iwl3945_rx_queue_update_write_ptr(priv, rxq);
Z
Zhu Yi 已提交
3621 3622 3623 3624 3625 3626 3627 3628
		if (rc)
			return rc;
	}

	return 0;
}

/**
C
Christoph Hellwig 已提交
3629
 * iwl3945_rx_replenish - Move all used packet from rx_used to rx_free
Z
Zhu Yi 已提交
3630 3631 3632
 *
 * When moving to rx_free an SKB is allocated for the slot.
 *
C
Christoph Hellwig 已提交
3633
 * Also restock the Rx queue via iwl3945_rx_queue_restock.
3634
 * This is called as a scheduled work item (except for during initialization)
Z
Zhu Yi 已提交
3635
 */
3636
static void iwl3945_rx_allocate(struct iwl3945_priv *priv)
Z
Zhu Yi 已提交
3637
{
C
Christoph Hellwig 已提交
3638
	struct iwl3945_rx_queue *rxq = &priv->rxq;
Z
Zhu Yi 已提交
3639
	struct list_head *element;
C
Christoph Hellwig 已提交
3640
	struct iwl3945_rx_mem_buffer *rxb;
Z
Zhu Yi 已提交
3641 3642 3643 3644
	unsigned long flags;
	spin_lock_irqsave(&rxq->lock, flags);
	while (!list_empty(&rxq->rx_used)) {
		element = rxq->rx_used.next;
C
Christoph Hellwig 已提交
3645
		rxb = list_entry(element, struct iwl3945_rx_mem_buffer, list);
3646 3647

		/* Alloc a new receive buffer */
Z
Zhu Yi 已提交
3648 3649 3650 3651 3652 3653 3654 3655 3656 3657 3658
		rxb->skb =
		    alloc_skb(IWL_RX_BUF_SIZE, __GFP_NOWARN | GFP_ATOMIC);
		if (!rxb->skb) {
			if (net_ratelimit())
				printk(KERN_CRIT DRV_NAME
				       ": Can not allocate SKB buffers\n");
			/* We don't reschedule replenish work here -- we will
			 * call the restock method and if it still needs
			 * more buffers it will schedule replenish */
			break;
		}
Z
Zhu Yi 已提交
3659 3660 3661 3662 3663 3664 3665 3666 3667

		/* If radiotap head is required, reserve some headroom here.
		 * The physical head count is a variable rx_stats->phy_count.
		 * We reserve 4 bytes here. Plus these extra bytes, the
		 * headroom of the physical head should be enough for the
		 * radiotap head that iwl3945 supported. See iwl3945_rt.
		 */
		skb_reserve(rxb->skb, 4);

Z
Zhu Yi 已提交
3668 3669
		priv->alloc_rxb_skb++;
		list_del(element);
3670 3671

		/* Get physical address of RB/SKB */
Z
Zhu Yi 已提交
3672 3673 3674 3675 3676 3677 3678
		rxb->dma_addr =
		    pci_map_single(priv->pci_dev, rxb->skb->data,
				   IWL_RX_BUF_SIZE, PCI_DMA_FROMDEVICE);
		list_add_tail(&rxb->list, &rxq->rx_free);
		rxq->free_count++;
	}
	spin_unlock_irqrestore(&rxq->lock, flags);
3679 3680 3681 3682 3683
}

/*
 * this should be called while priv->lock is locked
 */
3684
static void __iwl3945_rx_replenish(void *data)
3685 3686 3687 3688 3689 3690 3691 3692 3693 3694 3695 3696 3697 3698
{
	struct iwl3945_priv *priv = data;

	iwl3945_rx_allocate(priv);
	iwl3945_rx_queue_restock(priv);
}


void iwl3945_rx_replenish(void *data)
{
	struct iwl3945_priv *priv = data;
	unsigned long flags;

	iwl3945_rx_allocate(priv);
Z
Zhu Yi 已提交
3699 3700

	spin_lock_irqsave(&priv->lock, flags);
C
Christoph Hellwig 已提交
3701
	iwl3945_rx_queue_restock(priv);
Z
Zhu Yi 已提交
3702 3703 3704 3705
	spin_unlock_irqrestore(&priv->lock, flags);
}

/* Assumes that the skb field of the buffers in 'pool' is kept accurate.
3706
 * If an SKB has been detached, the POOL needs to have its SKB set to NULL
Z
Zhu Yi 已提交
3707 3708 3709
 * This free routine walks the list of POOL entries and if SKB is set to
 * non NULL it is unmapped and freed
 */
C
Christoph Hellwig 已提交
3710
static void iwl3945_rx_queue_free(struct iwl3945_priv *priv, struct iwl3945_rx_queue *rxq)
Z
Zhu Yi 已提交
3711 3712 3713 3714 3715 3716 3717 3718 3719 3720 3721 3722 3723 3724 3725 3726
{
	int i;
	for (i = 0; i < RX_QUEUE_SIZE + RX_FREE_BUFFERS; i++) {
		if (rxq->pool[i].skb != NULL) {
			pci_unmap_single(priv->pci_dev,
					 rxq->pool[i].dma_addr,
					 IWL_RX_BUF_SIZE, PCI_DMA_FROMDEVICE);
			dev_kfree_skb(rxq->pool[i].skb);
		}
	}

	pci_free_consistent(priv->pci_dev, 4 * RX_QUEUE_SIZE, rxq->bd,
			    rxq->dma_addr);
	rxq->bd = NULL;
}

C
Christoph Hellwig 已提交
3727
int iwl3945_rx_queue_alloc(struct iwl3945_priv *priv)
Z
Zhu Yi 已提交
3728
{
C
Christoph Hellwig 已提交
3729
	struct iwl3945_rx_queue *rxq = &priv->rxq;
Z
Zhu Yi 已提交
3730 3731 3732 3733 3734 3735
	struct pci_dev *dev = priv->pci_dev;
	int i;

	spin_lock_init(&rxq->lock);
	INIT_LIST_HEAD(&rxq->rx_free);
	INIT_LIST_HEAD(&rxq->rx_used);
3736 3737

	/* Alloc the circular buffer of Read Buffer Descriptors (RBDs) */
Z
Zhu Yi 已提交
3738 3739 3740
	rxq->bd = pci_alloc_consistent(dev, 4 * RX_QUEUE_SIZE, &rxq->dma_addr);
	if (!rxq->bd)
		return -ENOMEM;
3741

Z
Zhu Yi 已提交
3742 3743 3744
	/* Fill the rx_used queue with _all_ of the Rx buffers */
	for (i = 0; i < RX_FREE_BUFFERS + RX_QUEUE_SIZE; i++)
		list_add_tail(&rxq->pool[i].list, &rxq->rx_used);
3745

Z
Zhu Yi 已提交
3746 3747 3748 3749 3750 3751 3752 3753
	/* Set us so that we have processed and used all buffers, but have
	 * not restocked the Rx queue with fresh buffers */
	rxq->read = rxq->write = 0;
	rxq->free_count = 0;
	rxq->need_update = 0;
	return 0;
}

C
Christoph Hellwig 已提交
3754
void iwl3945_rx_queue_reset(struct iwl3945_priv *priv, struct iwl3945_rx_queue *rxq)
Z
Zhu Yi 已提交
3755 3756 3757 3758 3759 3760 3761 3762 3763 3764 3765 3766 3767 3768 3769 3770 3771 3772 3773 3774 3775 3776 3777 3778 3779 3780 3781 3782 3783 3784 3785 3786 3787 3788 3789 3790 3791 3792 3793 3794 3795 3796 3797 3798 3799 3800
{
	unsigned long flags;
	int i;
	spin_lock_irqsave(&rxq->lock, flags);
	INIT_LIST_HEAD(&rxq->rx_free);
	INIT_LIST_HEAD(&rxq->rx_used);
	/* Fill the rx_used queue with _all_ of the Rx buffers */
	for (i = 0; i < RX_FREE_BUFFERS + RX_QUEUE_SIZE; i++) {
		/* In the reset function, these buffers may have been allocated
		 * to an SKB, so we need to unmap and free potential storage */
		if (rxq->pool[i].skb != NULL) {
			pci_unmap_single(priv->pci_dev,
					 rxq->pool[i].dma_addr,
					 IWL_RX_BUF_SIZE, PCI_DMA_FROMDEVICE);
			priv->alloc_rxb_skb--;
			dev_kfree_skb(rxq->pool[i].skb);
			rxq->pool[i].skb = NULL;
		}
		list_add_tail(&rxq->pool[i].list, &rxq->rx_used);
	}

	/* Set us so that we have processed and used all buffers, but have
	 * not restocked the Rx queue with fresh buffers */
	rxq->read = rxq->write = 0;
	rxq->free_count = 0;
	spin_unlock_irqrestore(&rxq->lock, flags);
}

/* Convert linear signal-to-noise ratio into dB */
static u8 ratio2dB[100] = {
/*	 0   1   2   3   4   5   6   7   8   9 */
	 0,  0,  6, 10, 12, 14, 16, 17, 18, 19, /* 00 - 09 */
	20, 21, 22, 22, 23, 23, 24, 25, 26, 26, /* 10 - 19 */
	26, 26, 26, 27, 27, 28, 28, 28, 29, 29, /* 20 - 29 */
	29, 30, 30, 30, 31, 31, 31, 31, 32, 32, /* 30 - 39 */
	32, 32, 32, 33, 33, 33, 33, 33, 34, 34, /* 40 - 49 */
	34, 34, 34, 34, 35, 35, 35, 35, 35, 35, /* 50 - 59 */
	36, 36, 36, 36, 36, 36, 36, 37, 37, 37, /* 60 - 69 */
	37, 37, 37, 37, 37, 38, 38, 38, 38, 38, /* 70 - 79 */
	38, 38, 38, 38, 38, 39, 39, 39, 39, 39, /* 80 - 89 */
	39, 39, 39, 39, 39, 40, 40, 40, 40, 40  /* 90 - 99 */
};

/* Calculates a relative dB value from a ratio of linear
 *   (i.e. not dB) signal levels.
 * Conversion assumes that levels are voltages (20*log), not powers (10*log). */
C
Christoph Hellwig 已提交
3801
int iwl3945_calc_db_from_ratio(int sig_ratio)
Z
Zhu Yi 已提交
3802
{
3803 3804
	/* 1000:1 or higher just report as 60 dB */
	if (sig_ratio >= 1000)
Z
Zhu Yi 已提交
3805 3806
		return 60;

3807
	/* 100:1 or higher, divide by 10 and use table,
Z
Zhu Yi 已提交
3808
	 *   add 20 dB to make up for divide by 10 */
3809
	if (sig_ratio >= 100)
3810
		return 20 + (int)ratio2dB[sig_ratio/10];
Z
Zhu Yi 已提交
3811 3812 3813 3814 3815 3816 3817 3818 3819 3820 3821 3822 3823 3824 3825 3826

	/* We shouldn't see this */
	if (sig_ratio < 1)
		return 0;

	/* Use table for ratios 1:1 - 99:1 */
	return (int)ratio2dB[sig_ratio];
}

#define PERFECT_RSSI (-20) /* dBm */
#define WORST_RSSI (-95)   /* dBm */
#define RSSI_RANGE (PERFECT_RSSI - WORST_RSSI)

/* Calculate an indication of rx signal quality (a percentage, not dBm!).
 * See http://www.ces.clemson.edu/linux/signal_quality.shtml for info
 *   about formulas used below. */
C
Christoph Hellwig 已提交
3827
int iwl3945_calc_sig_qual(int rssi_dbm, int noise_dbm)
Z
Zhu Yi 已提交
3828 3829 3830 3831 3832 3833 3834 3835 3836 3837 3838 3839 3840 3841 3842 3843 3844 3845 3846 3847 3848 3849 3850 3851 3852 3853 3854 3855 3856 3857 3858 3859 3860 3861
{
	int sig_qual;
	int degradation = PERFECT_RSSI - rssi_dbm;

	/* If we get a noise measurement, use signal-to-noise ratio (SNR)
	 * as indicator; formula is (signal dbm - noise dbm).
	 * SNR at or above 40 is a great signal (100%).
	 * Below that, scale to fit SNR of 0 - 40 dB within 0 - 100% indicator.
	 * Weakest usable signal is usually 10 - 15 dB SNR. */
	if (noise_dbm) {
		if (rssi_dbm - noise_dbm >= 40)
			return 100;
		else if (rssi_dbm < noise_dbm)
			return 0;
		sig_qual = ((rssi_dbm - noise_dbm) * 5) / 2;

	/* Else use just the signal level.
	 * This formula is a least squares fit of data points collected and
	 *   compared with a reference system that had a percentage (%) display
	 *   for signal quality. */
	} else
		sig_qual = (100 * (RSSI_RANGE * RSSI_RANGE) - degradation *
			    (15 * RSSI_RANGE + 62 * degradation)) /
			   (RSSI_RANGE * RSSI_RANGE);

	if (sig_qual > 100)
		sig_qual = 100;
	else if (sig_qual < 1)
		sig_qual = 0;

	return sig_qual;
}

/**
3862
 * iwl3945_rx_handle - Main entry function for receiving responses from uCode
Z
Zhu Yi 已提交
3863 3864 3865 3866 3867
 *
 * Uses the priv->rx_handlers callback function array to invoke
 * the appropriate handlers, including command responses,
 * frame-received notifications, and other notifications.
 */
C
Christoph Hellwig 已提交
3868
static void iwl3945_rx_handle(struct iwl3945_priv *priv)
Z
Zhu Yi 已提交
3869
{
C
Christoph Hellwig 已提交
3870 3871 3872
	struct iwl3945_rx_mem_buffer *rxb;
	struct iwl3945_rx_packet *pkt;
	struct iwl3945_rx_queue *rxq = &priv->rxq;
Z
Zhu Yi 已提交
3873 3874 3875
	u32 r, i;
	int reclaim;
	unsigned long flags;
3876
	u8 fill_rx = 0;
M
Mohamed Abbas 已提交
3877
	u32 count = 8;
Z
Zhu Yi 已提交
3878

3879 3880
	/* uCode's read index (stored in shared DRAM) indicates the last Rx
	 * buffer that the driver may process (last buffer filled by ucode). */
C
Christoph Hellwig 已提交
3881
	r = iwl3945_hw_get_rx_read(priv);
Z
Zhu Yi 已提交
3882 3883
	i = rxq->read;

3884 3885
	if (iwl3945_rx_queue_space(rxq) > (RX_QUEUE_SIZE / 2))
		fill_rx = 1;
Z
Zhu Yi 已提交
3886 3887 3888 3889 3890 3891 3892
	/* Rx interrupt, but nothing sent from uCode */
	if (i == r)
		IWL_DEBUG(IWL_DL_RX | IWL_DL_ISR, "r = %d, i = %d\n", r, i);

	while (i != r) {
		rxb = rxq->queue[i];

3893
		/* If an RXB doesn't have a Rx queue slot associated with it,
Z
Zhu Yi 已提交
3894 3895 3896 3897 3898 3899 3900 3901 3902
		 * then a bug has been introduced in the queue refilling
		 * routines -- catch it here */
		BUG_ON(rxb == NULL);

		rxq->queue[i] = NULL;

		pci_dma_sync_single_for_cpu(priv->pci_dev, rxb->dma_addr,
					    IWL_RX_BUF_SIZE,
					    PCI_DMA_FROMDEVICE);
C
Christoph Hellwig 已提交
3903
		pkt = (struct iwl3945_rx_packet *)rxb->skb->data;
Z
Zhu Yi 已提交
3904 3905 3906 3907 3908 3909 3910 3911 3912 3913 3914 3915 3916

		/* Reclaim a command buffer only if this packet is a response
		 *   to a (driver-originated) command.
		 * If the packet (e.g. Rx frame) originated from uCode,
		 *   there is no command buffer to reclaim.
		 * Ucode should set SEQ_RX_FRAME bit if ucode-originated,
		 *   but apparently a few don't get set; catch them here. */
		reclaim = !(pkt->hdr.sequence & SEQ_RX_FRAME) &&
			(pkt->hdr.cmd != STATISTICS_NOTIFICATION) &&
			(pkt->hdr.cmd != REPLY_TX);

		/* Based on type of command response or notification,
		 *   handle those that need handling via function in
C
Christoph Hellwig 已提交
3917
		 *   rx_handlers table.  See iwl3945_setup_rx_handlers() */
Z
Zhu Yi 已提交
3918 3919 3920 3921 3922 3923 3924 3925 3926 3927 3928 3929 3930 3931
		if (priv->rx_handlers[pkt->hdr.cmd]) {
			IWL_DEBUG(IWL_DL_HOST_COMMAND | IWL_DL_RX | IWL_DL_ISR,
				"r = %d, i = %d, %s, 0x%02x\n", r, i,
				get_cmd_string(pkt->hdr.cmd), pkt->hdr.cmd);
			priv->rx_handlers[pkt->hdr.cmd] (priv, rxb);
		} else {
			/* No handling needed */
			IWL_DEBUG(IWL_DL_HOST_COMMAND | IWL_DL_RX | IWL_DL_ISR,
				"r %d i %d No handler needed for %s, 0x%02x\n",
				r, i, get_cmd_string(pkt->hdr.cmd),
				pkt->hdr.cmd);
		}

		if (reclaim) {
3932 3933
			/* Invoke any callbacks, transfer the skb to caller, and
			 * fire off the (possibly) blocking iwl3945_send_cmd()
Z
Zhu Yi 已提交
3934 3935
			 * as we reclaim the driver command queue */
			if (rxb && rxb->skb)
C
Christoph Hellwig 已提交
3936
				iwl3945_tx_cmd_complete(priv, rxb);
Z
Zhu Yi 已提交
3937 3938 3939 3940 3941 3942 3943 3944 3945 3946 3947 3948 3949 3950 3951 3952 3953 3954 3955
			else
				IWL_WARNING("Claim null rxb?\n");
		}

		/* For now we just don't re-use anything.  We can tweak this
		 * later to try and re-use notification packets and SKBs that
		 * fail to Rx correctly */
		if (rxb->skb != NULL) {
			priv->alloc_rxb_skb--;
			dev_kfree_skb_any(rxb->skb);
			rxb->skb = NULL;
		}

		pci_unmap_single(priv->pci_dev, rxb->dma_addr,
				 IWL_RX_BUF_SIZE, PCI_DMA_FROMDEVICE);
		spin_lock_irqsave(&rxq->lock, flags);
		list_add_tail(&rxb->list, &priv->rxq.rx_used);
		spin_unlock_irqrestore(&rxq->lock, flags);
		i = (i + 1) & RX_QUEUE_MASK;
3956 3957 3958 3959 3960 3961 3962 3963 3964 3965
		/* If there are a lot of unused frames,
		 * restock the Rx queue so ucode won't assert. */
		if (fill_rx) {
			count++;
			if (count >= 8) {
				priv->rxq.read = i;
				__iwl3945_rx_replenish(priv);
				count = 0;
			}
		}
Z
Zhu Yi 已提交
3966 3967 3968 3969
	}

	/* Backtrack one entry */
	priv->rxq.read = i;
C
Christoph Hellwig 已提交
3970
	iwl3945_rx_queue_restock(priv);
Z
Zhu Yi 已提交
3971 3972
}

3973 3974 3975
/**
 * iwl3945_tx_queue_update_write_ptr - Send new write index to hardware
 */
C
Christoph Hellwig 已提交
3976 3977
static int iwl3945_tx_queue_update_write_ptr(struct iwl3945_priv *priv,
				  struct iwl3945_tx_queue *txq)
Z
Zhu Yi 已提交
3978 3979 3980 3981 3982 3983 3984 3985 3986 3987 3988 3989 3990
{
	u32 reg = 0;
	int rc = 0;
	int txq_id = txq->q.id;

	if (txq->need_update == 0)
		return rc;

	/* if we're trying to save power */
	if (test_bit(STATUS_POWER_PMI, &priv->status)) {
		/* wake up nic if it's powered down ...
		 * uCode will wake up, and interrupt us again, so next
		 * time we'll skip this part. */
C
Christoph Hellwig 已提交
3991
		reg = iwl3945_read32(priv, CSR_UCODE_DRV_GP1);
Z
Zhu Yi 已提交
3992 3993 3994

		if (reg & CSR_UCODE_DRV_GP1_BIT_MAC_SLEEP) {
			IWL_DEBUG_INFO("Requesting wakeup, GP1 = 0x%x\n", reg);
C
Christoph Hellwig 已提交
3995
			iwl3945_set_bit(priv, CSR_GP_CNTRL,
Z
Zhu Yi 已提交
3996 3997 3998 3999 4000
				    CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ);
			return rc;
		}

		/* restore this queue's parameters in nic hardware. */
C
Christoph Hellwig 已提交
4001
		rc = iwl3945_grab_nic_access(priv);
Z
Zhu Yi 已提交
4002 4003
		if (rc)
			return rc;
C
Christoph Hellwig 已提交
4004
		iwl3945_write_direct32(priv, HBUS_TARG_WRPTR,
4005
				     txq->q.write_ptr | (txq_id << 8));
C
Christoph Hellwig 已提交
4006
		iwl3945_release_nic_access(priv);
Z
Zhu Yi 已提交
4007 4008 4009 4010

	/* else not in power-save mode, uCode will never sleep when we're
	 * trying to tx (during RFKILL, we're not trying to tx). */
	} else
C
Christoph Hellwig 已提交
4011
		iwl3945_write32(priv, HBUS_TARG_WRPTR,
4012
			    txq->q.write_ptr | (txq_id << 8));
Z
Zhu Yi 已提交
4013 4014 4015 4016 4017 4018

	txq->need_update = 0;

	return rc;
}

4019
#ifdef CONFIG_IWL3945_DEBUG
C
Christoph Hellwig 已提交
4020
static void iwl3945_print_rx_config_cmd(struct iwl3945_rxon_cmd *rxon)
Z
Zhu Yi 已提交
4021
{
4022 4023
	DECLARE_MAC_BUF(mac);

Z
Zhu Yi 已提交
4024
	IWL_DEBUG_RADIO("RX CONFIG:\n");
C
Christoph Hellwig 已提交
4025
	iwl3945_print_hex_dump(IWL_DL_RADIO, (u8 *) rxon, sizeof(*rxon));
Z
Zhu Yi 已提交
4026 4027 4028 4029 4030 4031 4032 4033
	IWL_DEBUG_RADIO("u16 channel: 0x%x\n", le16_to_cpu(rxon->channel));
	IWL_DEBUG_RADIO("u32 flags: 0x%08X\n", le32_to_cpu(rxon->flags));
	IWL_DEBUG_RADIO("u32 filter_flags: 0x%08x\n",
			le32_to_cpu(rxon->filter_flags));
	IWL_DEBUG_RADIO("u8 dev_type: 0x%x\n", rxon->dev_type);
	IWL_DEBUG_RADIO("u8 ofdm_basic_rates: 0x%02x\n",
			rxon->ofdm_basic_rates);
	IWL_DEBUG_RADIO("u8 cck_basic_rates: 0x%02x\n", rxon->cck_basic_rates);
4034 4035 4036 4037
	IWL_DEBUG_RADIO("u8[6] node_addr: %s\n",
			print_mac(mac, rxon->node_addr));
	IWL_DEBUG_RADIO("u8[6] bssid_addr: %s\n",
			print_mac(mac, rxon->bssid_addr));
Z
Zhu Yi 已提交
4038 4039 4040 4041
	IWL_DEBUG_RADIO("u16 assoc_id: 0x%x\n", le16_to_cpu(rxon->assoc_id));
}
#endif

C
Christoph Hellwig 已提交
4042
static void iwl3945_enable_interrupts(struct iwl3945_priv *priv)
Z
Zhu Yi 已提交
4043 4044 4045
{
	IWL_DEBUG_ISR("Enabling interrupts\n");
	set_bit(STATUS_INT_ENABLED, &priv->status);
C
Christoph Hellwig 已提交
4046
	iwl3945_write32(priv, CSR_INT_MASK, CSR_INI_SET_MASK);
Z
Zhu Yi 已提交
4047 4048
}

4049 4050 4051 4052 4053 4054 4055 4056 4057 4058

/* call this function to flush any scheduled tasklet */
static inline void iwl_synchronize_irq(struct iwl3945_priv *priv)
{
	/* wait to make sure we flush pedding tasklet*/
	synchronize_irq(priv->pci_dev->irq);
	tasklet_kill(&priv->irq_tasklet);
}


C
Christoph Hellwig 已提交
4059
static inline void iwl3945_disable_interrupts(struct iwl3945_priv *priv)
Z
Zhu Yi 已提交
4060 4061 4062 4063
{
	clear_bit(STATUS_INT_ENABLED, &priv->status);

	/* disable interrupts from uCode/NIC to host */
C
Christoph Hellwig 已提交
4064
	iwl3945_write32(priv, CSR_INT_MASK, 0x00000000);
Z
Zhu Yi 已提交
4065 4066 4067

	/* acknowledge/clear/reset any interrupts still pending
	 * from uCode or flow handler (Rx/Tx DMA) */
C
Christoph Hellwig 已提交
4068 4069
	iwl3945_write32(priv, CSR_INT, 0xffffffff);
	iwl3945_write32(priv, CSR_FH_INT_STATUS, 0xffffffff);
Z
Zhu Yi 已提交
4070 4071 4072 4073 4074 4075 4076 4077 4078 4079 4080 4081 4082 4083 4084 4085 4086 4087 4088 4089 4090 4091 4092 4093 4094 4095
	IWL_DEBUG_ISR("Disabled interrupts\n");
}

static const char *desc_lookup(int i)
{
	switch (i) {
	case 1:
		return "FAIL";
	case 2:
		return "BAD_PARAM";
	case 3:
		return "BAD_CHECKSUM";
	case 4:
		return "NMI_INTERRUPT";
	case 5:
		return "SYSASSERT";
	case 6:
		return "FATAL_ERROR";
	}

	return "UNKNOWN";
}

#define ERROR_START_OFFSET  (1 * sizeof(u32))
#define ERROR_ELEM_SIZE     (7 * sizeof(u32))

C
Christoph Hellwig 已提交
4096
static void iwl3945_dump_nic_error_log(struct iwl3945_priv *priv)
Z
Zhu Yi 已提交
4097 4098 4099 4100 4101 4102 4103 4104
{
	u32 i;
	u32 desc, time, count, base, data1;
	u32 blink1, blink2, ilink1, ilink2;
	int rc;

	base = le32_to_cpu(priv->card_alive.error_event_table_ptr);

C
Christoph Hellwig 已提交
4105
	if (!iwl3945_hw_valid_rtc_data_addr(base)) {
Z
Zhu Yi 已提交
4106 4107 4108 4109
		IWL_ERROR("Not valid error log pointer 0x%08X\n", base);
		return;
	}

C
Christoph Hellwig 已提交
4110
	rc = iwl3945_grab_nic_access(priv);
Z
Zhu Yi 已提交
4111 4112 4113 4114 4115
	if (rc) {
		IWL_WARNING("Can not read from adapter at this time.\n");
		return;
	}

C
Christoph Hellwig 已提交
4116
	count = iwl3945_read_targ_mem(priv, base);
Z
Zhu Yi 已提交
4117 4118 4119

	if (ERROR_START_OFFSET <= count * ERROR_ELEM_SIZE) {
		IWL_ERROR("Start IWL Error Log Dump:\n");
4120
		IWL_ERROR("Status: 0x%08lX, count: %d\n", priv->status, count);
Z
Zhu Yi 已提交
4121 4122 4123 4124 4125 4126 4127
	}

	IWL_ERROR("Desc       Time       asrtPC  blink2 "
		  "ilink1  nmiPC   Line\n");
	for (i = ERROR_START_OFFSET;
	     i < (count * ERROR_ELEM_SIZE) + ERROR_START_OFFSET;
	     i += ERROR_ELEM_SIZE) {
C
Christoph Hellwig 已提交
4128
		desc = iwl3945_read_targ_mem(priv, base + i);
Z
Zhu Yi 已提交
4129
		time =
C
Christoph Hellwig 已提交
4130
		    iwl3945_read_targ_mem(priv, base + i + 1 * sizeof(u32));
Z
Zhu Yi 已提交
4131
		blink1 =
C
Christoph Hellwig 已提交
4132
		    iwl3945_read_targ_mem(priv, base + i + 2 * sizeof(u32));
Z
Zhu Yi 已提交
4133
		blink2 =
C
Christoph Hellwig 已提交
4134
		    iwl3945_read_targ_mem(priv, base + i + 3 * sizeof(u32));
Z
Zhu Yi 已提交
4135
		ilink1 =
C
Christoph Hellwig 已提交
4136
		    iwl3945_read_targ_mem(priv, base + i + 4 * sizeof(u32));
Z
Zhu Yi 已提交
4137
		ilink2 =
C
Christoph Hellwig 已提交
4138
		    iwl3945_read_targ_mem(priv, base + i + 5 * sizeof(u32));
Z
Zhu Yi 已提交
4139
		data1 =
C
Christoph Hellwig 已提交
4140
		    iwl3945_read_targ_mem(priv, base + i + 6 * sizeof(u32));
Z
Zhu Yi 已提交
4141 4142 4143 4144 4145 4146 4147

		IWL_ERROR
		    ("%-13s (#%d) %010u 0x%05X 0x%05X 0x%05X 0x%05X %u\n\n",
		     desc_lookup(desc), desc, time, blink1, blink2,
		     ilink1, ilink2, data1);
	}

C
Christoph Hellwig 已提交
4148
	iwl3945_release_nic_access(priv);
Z
Zhu Yi 已提交
4149 4150 4151

}

4152
#define EVENT_START_OFFSET  (6 * sizeof(u32))
Z
Zhu Yi 已提交
4153 4154

/**
C
Christoph Hellwig 已提交
4155
 * iwl3945_print_event_log - Dump error event log to syslog
Z
Zhu Yi 已提交
4156
 *
C
Christoph Hellwig 已提交
4157
 * NOTE: Must be called with iwl3945_grab_nic_access() already obtained!
Z
Zhu Yi 已提交
4158
 */
C
Christoph Hellwig 已提交
4159
static void iwl3945_print_event_log(struct iwl3945_priv *priv, u32 start_idx,
Z
Zhu Yi 已提交
4160 4161 4162 4163 4164 4165 4166 4167 4168 4169 4170 4171 4172 4173 4174 4175 4176 4177 4178 4179 4180 4181 4182
				u32 num_events, u32 mode)
{
	u32 i;
	u32 base;       /* SRAM byte address of event log header */
	u32 event_size;	/* 2 u32s, or 3 u32s if timestamp recorded */
	u32 ptr;        /* SRAM byte address of log data */
	u32 ev, time, data; /* event log data */

	if (num_events == 0)
		return;

	base = le32_to_cpu(priv->card_alive.log_event_table_ptr);

	if (mode == 0)
		event_size = 2 * sizeof(u32);
	else
		event_size = 3 * sizeof(u32);

	ptr = base + EVENT_START_OFFSET + (start_idx * event_size);

	/* "time" is actually "data" for mode 0 (no timestamp).
	 * place event id # at far right for easier visual parsing. */
	for (i = 0; i < num_events; i++) {
C
Christoph Hellwig 已提交
4183
		ev = iwl3945_read_targ_mem(priv, ptr);
Z
Zhu Yi 已提交
4184
		ptr += sizeof(u32);
C
Christoph Hellwig 已提交
4185
		time = iwl3945_read_targ_mem(priv, ptr);
Z
Zhu Yi 已提交
4186 4187 4188 4189
		ptr += sizeof(u32);
		if (mode == 0)
			IWL_ERROR("0x%08x\t%04u\n", time, ev); /* data, ev */
		else {
C
Christoph Hellwig 已提交
4190
			data = iwl3945_read_targ_mem(priv, ptr);
Z
Zhu Yi 已提交
4191 4192 4193 4194 4195 4196
			ptr += sizeof(u32);
			IWL_ERROR("%010u\t0x%08x\t%04u\n", time, data, ev);
		}
	}
}

C
Christoph Hellwig 已提交
4197
static void iwl3945_dump_nic_event_log(struct iwl3945_priv *priv)
Z
Zhu Yi 已提交
4198 4199 4200 4201 4202 4203 4204 4205 4206 4207
{
	int rc;
	u32 base;       /* SRAM byte address of event log header */
	u32 capacity;   /* event log capacity in # entries */
	u32 mode;       /* 0 - no timestamp, 1 - timestamp recorded */
	u32 num_wraps;  /* # times uCode wrapped to top of log */
	u32 next_entry; /* index of next entry to be written by uCode */
	u32 size;       /* # entries that we'll print */

	base = le32_to_cpu(priv->card_alive.log_event_table_ptr);
C
Christoph Hellwig 已提交
4208
	if (!iwl3945_hw_valid_rtc_data_addr(base)) {
Z
Zhu Yi 已提交
4209 4210 4211 4212
		IWL_ERROR("Invalid event log pointer 0x%08X\n", base);
		return;
	}

C
Christoph Hellwig 已提交
4213
	rc = iwl3945_grab_nic_access(priv);
Z
Zhu Yi 已提交
4214 4215 4216 4217 4218 4219
	if (rc) {
		IWL_WARNING("Can not read from adapter at this time.\n");
		return;
	}

	/* event log header */
C
Christoph Hellwig 已提交
4220 4221 4222 4223
	capacity = iwl3945_read_targ_mem(priv, base);
	mode = iwl3945_read_targ_mem(priv, base + (1 * sizeof(u32)));
	num_wraps = iwl3945_read_targ_mem(priv, base + (2 * sizeof(u32)));
	next_entry = iwl3945_read_targ_mem(priv, base + (3 * sizeof(u32)));
Z
Zhu Yi 已提交
4224 4225 4226 4227 4228

	size = num_wraps ? capacity : next_entry;

	/* bail out if nothing in log */
	if (size == 0) {
4229
		IWL_ERROR("Start IWL Event Log Dump: nothing in log\n");
C
Christoph Hellwig 已提交
4230
		iwl3945_release_nic_access(priv);
Z
Zhu Yi 已提交
4231 4232 4233
		return;
	}

4234
	IWL_ERROR("Start IWL Event Log Dump: display count %d, wraps %d\n",
Z
Zhu Yi 已提交
4235 4236 4237 4238 4239
		  size, num_wraps);

	/* if uCode has wrapped back to top of log, start at the oldest entry,
	 * i.e the next one that uCode would fill. */
	if (num_wraps)
C
Christoph Hellwig 已提交
4240
		iwl3945_print_event_log(priv, next_entry,
Z
Zhu Yi 已提交
4241 4242 4243
				    capacity - next_entry, mode);

	/* (then/else) start at top of log */
C
Christoph Hellwig 已提交
4244
	iwl3945_print_event_log(priv, 0, next_entry, mode);
Z
Zhu Yi 已提交
4245

C
Christoph Hellwig 已提交
4246
	iwl3945_release_nic_access(priv);
Z
Zhu Yi 已提交
4247 4248 4249
}

/**
C
Christoph Hellwig 已提交
4250
 * iwl3945_irq_handle_error - called for HW or SW error interrupt from card
Z
Zhu Yi 已提交
4251
 */
C
Christoph Hellwig 已提交
4252
static void iwl3945_irq_handle_error(struct iwl3945_priv *priv)
Z
Zhu Yi 已提交
4253
{
C
Christoph Hellwig 已提交
4254
	/* Set the FW error flag -- cleared on iwl3945_down */
Z
Zhu Yi 已提交
4255 4256 4257 4258 4259
	set_bit(STATUS_FW_ERROR, &priv->status);

	/* Cancel currently queued command. */
	clear_bit(STATUS_HCMD_ACTIVE, &priv->status);

4260
#ifdef CONFIG_IWL3945_DEBUG
C
Christoph Hellwig 已提交
4261 4262 4263 4264
	if (iwl3945_debug_level & IWL_DL_FW_ERRORS) {
		iwl3945_dump_nic_error_log(priv);
		iwl3945_dump_nic_event_log(priv);
		iwl3945_print_rx_config_cmd(&priv->staging_rxon);
Z
Zhu Yi 已提交
4265 4266 4267 4268 4269 4270 4271 4272 4273 4274 4275 4276 4277
	}
#endif

	wake_up_interruptible(&priv->wait_command_queue);

	/* Keep the restart process from trying to send host
	 * commands by clearing the INIT status bit */
	clear_bit(STATUS_READY, &priv->status);

	if (!test_bit(STATUS_EXIT_PENDING, &priv->status)) {
		IWL_DEBUG(IWL_DL_INFO | IWL_DL_FW_ERRORS,
			  "Restarting adapter due to uCode error.\n");

C
Christoph Hellwig 已提交
4278
		if (iwl3945_is_associated(priv)) {
Z
Zhu Yi 已提交
4279 4280 4281 4282 4283 4284 4285 4286
			memcpy(&priv->recovery_rxon, &priv->active_rxon,
			       sizeof(priv->recovery_rxon));
			priv->error_recovering = 1;
		}
		queue_work(priv->workqueue, &priv->restart);
	}
}

C
Christoph Hellwig 已提交
4287
static void iwl3945_error_recovery(struct iwl3945_priv *priv)
Z
Zhu Yi 已提交
4288 4289 4290 4291 4292 4293
{
	unsigned long flags;

	memcpy(&priv->staging_rxon, &priv->recovery_rxon,
	       sizeof(priv->staging_rxon));
	priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
C
Christoph Hellwig 已提交
4294
	iwl3945_commit_rxon(priv);
Z
Zhu Yi 已提交
4295

C
Christoph Hellwig 已提交
4296
	iwl3945_add_station(priv, priv->bssid, 1, 0);
Z
Zhu Yi 已提交
4297 4298 4299 4300 4301 4302 4303

	spin_lock_irqsave(&priv->lock, flags);
	priv->assoc_id = le16_to_cpu(priv->staging_rxon.assoc_id);
	priv->error_recovering = 0;
	spin_unlock_irqrestore(&priv->lock, flags);
}

C
Christoph Hellwig 已提交
4304
static void iwl3945_irq_tasklet(struct iwl3945_priv *priv)
Z
Zhu Yi 已提交
4305 4306 4307 4308
{
	u32 inta, handled = 0;
	u32 inta_fh;
	unsigned long flags;
4309
#ifdef CONFIG_IWL3945_DEBUG
Z
Zhu Yi 已提交
4310 4311 4312 4313 4314 4315 4316 4317
	u32 inta_mask;
#endif

	spin_lock_irqsave(&priv->lock, flags);

	/* Ack/clear/reset pending uCode interrupts.
	 * Note:  Some bits in CSR_INT are "OR" of bits in CSR_FH_INT_STATUS,
	 *  and will clear only when CSR_FH_INT_STATUS gets cleared. */
C
Christoph Hellwig 已提交
4318 4319
	inta = iwl3945_read32(priv, CSR_INT);
	iwl3945_write32(priv, CSR_INT, inta);
Z
Zhu Yi 已提交
4320 4321 4322 4323

	/* Ack/clear/reset pending flow-handler (DMA) interrupts.
	 * Any new interrupts that happen after this, either while we're
	 * in this tasklet, or later, will show up in next ISR/tasklet. */
C
Christoph Hellwig 已提交
4324 4325
	inta_fh = iwl3945_read32(priv, CSR_FH_INT_STATUS);
	iwl3945_write32(priv, CSR_FH_INT_STATUS, inta_fh);
Z
Zhu Yi 已提交
4326

4327
#ifdef CONFIG_IWL3945_DEBUG
C
Christoph Hellwig 已提交
4328
	if (iwl3945_debug_level & IWL_DL_ISR) {
4329 4330
		/* just for debug */
		inta_mask = iwl3945_read32(priv, CSR_INT_MASK);
Z
Zhu Yi 已提交
4331 4332 4333 4334 4335 4336 4337 4338 4339
		IWL_DEBUG_ISR("inta 0x%08x, enabled 0x%08x, fh 0x%08x\n",
			      inta, inta_mask, inta_fh);
	}
#endif

	/* Since CSR_INT and CSR_FH_INT_STATUS reads and clears are not
	 * atomic, make sure that inta covers all the interrupts that
	 * we've discovered, even if FH interrupt came in just after
	 * reading CSR_INT. */
T
Tomas Winkler 已提交
4340
	if (inta_fh & CSR39_FH_INT_RX_MASK)
Z
Zhu Yi 已提交
4341
		inta |= CSR_INT_BIT_FH_RX;
T
Tomas Winkler 已提交
4342
	if (inta_fh & CSR39_FH_INT_TX_MASK)
Z
Zhu Yi 已提交
4343 4344 4345 4346 4347 4348 4349
		inta |= CSR_INT_BIT_FH_TX;

	/* Now service all interrupt bits discovered above. */
	if (inta & CSR_INT_BIT_HW_ERR) {
		IWL_ERROR("Microcode HW error detected.  Restarting.\n");

		/* Tell the device to stop sending interrupts */
C
Christoph Hellwig 已提交
4350
		iwl3945_disable_interrupts(priv);
Z
Zhu Yi 已提交
4351

C
Christoph Hellwig 已提交
4352
		iwl3945_irq_handle_error(priv);
Z
Zhu Yi 已提交
4353 4354 4355 4356 4357 4358 4359 4360

		handled |= CSR_INT_BIT_HW_ERR;

		spin_unlock_irqrestore(&priv->lock, flags);

		return;
	}

4361
#ifdef CONFIG_IWL3945_DEBUG
C
Christoph Hellwig 已提交
4362
	if (iwl3945_debug_level & (IWL_DL_ISR)) {
Z
Zhu Yi 已提交
4363
		/* NIC fires this, but we don't use it, redundant with WAKEUP */
4364 4365 4366
		if (inta & CSR_INT_BIT_SCD)
			IWL_DEBUG_ISR("Scheduler finished to transmit "
				      "the frame/frames.\n");
Z
Zhu Yi 已提交
4367 4368 4369 4370 4371 4372 4373

		/* Alive notification via Rx interrupt will do the real work */
		if (inta & CSR_INT_BIT_ALIVE)
			IWL_DEBUG_ISR("Alive interrupt\n");
	}
#endif
	/* Safely ignore these bits for debug checks below */
4374
	inta &= ~(CSR_INT_BIT_SCD | CSR_INT_BIT_ALIVE);
Z
Zhu Yi 已提交
4375 4376 4377 4378

	/* HW RF KILL switch toggled (4965 only) */
	if (inta & CSR_INT_BIT_RF_KILL) {
		int hw_rf_kill = 0;
C
Christoph Hellwig 已提交
4379
		if (!(iwl3945_read32(priv, CSR_GP_CNTRL) &
Z
Zhu Yi 已提交
4380 4381 4382 4383 4384 4385 4386 4387 4388 4389
				CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW))
			hw_rf_kill = 1;

		IWL_DEBUG(IWL_DL_INFO | IWL_DL_RF_KILL | IWL_DL_ISR,
				"RF_KILL bit toggled to %s.\n",
				hw_rf_kill ? "disable radio":"enable radio");

		/* Queue restart only if RF_KILL switch was set to "kill"
		 *   when we loaded driver, and is now set to "enable".
		 * After we're Alive, RF_KILL gets handled by
4390
		 *   iwl3945_rx_card_state_notif() */
4391 4392
		if (!hw_rf_kill && !test_bit(STATUS_ALIVE, &priv->status)) {
			clear_bit(STATUS_RF_KILL_HW, &priv->status);
Z
Zhu Yi 已提交
4393
			queue_work(priv->workqueue, &priv->restart);
4394
		}
Z
Zhu Yi 已提交
4395 4396 4397 4398 4399 4400 4401 4402 4403 4404 4405 4406 4407 4408

		handled |= CSR_INT_BIT_RF_KILL;
	}

	/* Chip got too hot and stopped itself (4965 only) */
	if (inta & CSR_INT_BIT_CT_KILL) {
		IWL_ERROR("Microcode CT kill error detected.\n");
		handled |= CSR_INT_BIT_CT_KILL;
	}

	/* Error detected by uCode */
	if (inta & CSR_INT_BIT_SW_ERR) {
		IWL_ERROR("Microcode SW error detected.  Restarting 0x%X.\n",
			  inta);
C
Christoph Hellwig 已提交
4409
		iwl3945_irq_handle_error(priv);
Z
Zhu Yi 已提交
4410 4411 4412 4413 4414 4415
		handled |= CSR_INT_BIT_SW_ERR;
	}

	/* uCode wakes up after power-down sleep */
	if (inta & CSR_INT_BIT_WAKEUP) {
		IWL_DEBUG_ISR("Wakeup interrupt\n");
C
Christoph Hellwig 已提交
4416 4417 4418 4419 4420 4421 4422
		iwl3945_rx_queue_update_write_ptr(priv, &priv->rxq);
		iwl3945_tx_queue_update_write_ptr(priv, &priv->txq[0]);
		iwl3945_tx_queue_update_write_ptr(priv, &priv->txq[1]);
		iwl3945_tx_queue_update_write_ptr(priv, &priv->txq[2]);
		iwl3945_tx_queue_update_write_ptr(priv, &priv->txq[3]);
		iwl3945_tx_queue_update_write_ptr(priv, &priv->txq[4]);
		iwl3945_tx_queue_update_write_ptr(priv, &priv->txq[5]);
Z
Zhu Yi 已提交
4423 4424 4425 4426 4427 4428 4429 4430

		handled |= CSR_INT_BIT_WAKEUP;
	}

	/* All uCode command responses, including Tx command responses,
	 * Rx "responses" (frame-received notification), and other
	 * notifications from uCode come through here*/
	if (inta & (CSR_INT_BIT_FH_RX | CSR_INT_BIT_SW_RX)) {
C
Christoph Hellwig 已提交
4431
		iwl3945_rx_handle(priv);
Z
Zhu Yi 已提交
4432 4433 4434 4435 4436 4437
		handled |= (CSR_INT_BIT_FH_RX | CSR_INT_BIT_SW_RX);
	}

	if (inta & CSR_INT_BIT_FH_TX) {
		IWL_DEBUG_ISR("Tx interrupt\n");

C
Christoph Hellwig 已提交
4438 4439 4440
		iwl3945_write32(priv, CSR_FH_INT_STATUS, (1 << 6));
		if (!iwl3945_grab_nic_access(priv)) {
			iwl3945_write_direct32(priv,
Z
Zhu Yi 已提交
4441 4442
					     FH_TCSR_CREDIT
					     (ALM_FH_SRVC_CHNL), 0x0);
C
Christoph Hellwig 已提交
4443
			iwl3945_release_nic_access(priv);
Z
Zhu Yi 已提交
4444 4445 4446 4447 4448 4449 4450 4451 4452 4453 4454 4455 4456 4457
		}
		handled |= CSR_INT_BIT_FH_TX;
	}

	if (inta & ~handled)
		IWL_ERROR("Unhandled INTA bits 0x%08x\n", inta & ~handled);

	if (inta & ~CSR_INI_SET_MASK) {
		IWL_WARNING("Disabled INTA bits 0x%08x were pending\n",
			 inta & ~CSR_INI_SET_MASK);
		IWL_WARNING("   with FH_INT = 0x%08x\n", inta_fh);
	}

	/* Re-enable all interrupts */
4458 4459 4460
	/* only Re-enable if disabled by irq */
	if (test_bit(STATUS_INT_ENABLED, &priv->status))
		iwl3945_enable_interrupts(priv);
Z
Zhu Yi 已提交
4461

4462
#ifdef CONFIG_IWL3945_DEBUG
C
Christoph Hellwig 已提交
4463 4464 4465 4466
	if (iwl3945_debug_level & (IWL_DL_ISR)) {
		inta = iwl3945_read32(priv, CSR_INT);
		inta_mask = iwl3945_read32(priv, CSR_INT_MASK);
		inta_fh = iwl3945_read32(priv, CSR_FH_INT_STATUS);
Z
Zhu Yi 已提交
4467 4468 4469 4470 4471 4472 4473
		IWL_DEBUG_ISR("End inta 0x%08x, enabled 0x%08x, fh 0x%08x, "
			"flags 0x%08lx\n", inta, inta_mask, inta_fh, flags);
	}
#endif
	spin_unlock_irqrestore(&priv->lock, flags);
}

C
Christoph Hellwig 已提交
4474
static irqreturn_t iwl3945_isr(int irq, void *data)
Z
Zhu Yi 已提交
4475
{
C
Christoph Hellwig 已提交
4476
	struct iwl3945_priv *priv = data;
Z
Zhu Yi 已提交
4477 4478 4479 4480 4481 4482 4483 4484 4485 4486 4487
	u32 inta, inta_mask;
	u32 inta_fh;
	if (!priv)
		return IRQ_NONE;

	spin_lock(&priv->lock);

	/* Disable (but don't clear!) interrupts here to avoid
	 *    back-to-back ISRs and sporadic interrupts from our NIC.
	 * If we have something to service, the tasklet will re-enable ints.
	 * If we *don't* have something, we'll re-enable before leaving here. */
C
Christoph Hellwig 已提交
4488 4489
	inta_mask = iwl3945_read32(priv, CSR_INT_MASK);  /* just for debug */
	iwl3945_write32(priv, CSR_INT_MASK, 0x00000000);
Z
Zhu Yi 已提交
4490 4491

	/* Discover which interrupts are active/pending */
C
Christoph Hellwig 已提交
4492 4493
	inta = iwl3945_read32(priv, CSR_INT);
	inta_fh = iwl3945_read32(priv, CSR_FH_INT_STATUS);
Z
Zhu Yi 已提交
4494 4495 4496 4497 4498 4499 4500 4501 4502 4503 4504 4505

	/* Ignore interrupt if there's nothing in NIC to service.
	 * This may be due to IRQ shared with another device,
	 * or due to sporadic interrupts thrown from our NIC. */
	if (!inta && !inta_fh) {
		IWL_DEBUG_ISR("Ignore interrupt, inta == 0, inta_fh == 0\n");
		goto none;
	}

	if ((inta == 0xFFFFFFFF) || ((inta & 0xFFFFFFF0) == 0xa5a5a5a0)) {
		/* Hardware disappeared */
		IWL_WARNING("HARDWARE GONE?? INTA == 0x%080x\n", inta);
4506
		goto unplugged;
Z
Zhu Yi 已提交
4507 4508 4509 4510 4511
	}

	IWL_DEBUG_ISR("ISR inta 0x%08x, enabled 0x%08x, fh 0x%08x\n",
		      inta, inta_mask, inta_fh);

4512 4513
	inta &= ~CSR_INT_BIT_SCD;

C
Christoph Hellwig 已提交
4514
	/* iwl3945_irq_tasklet() will service interrupts and re-enable them */
4515 4516
	if (likely(inta || inta_fh))
		tasklet_schedule(&priv->irq_tasklet);
4517
unplugged:
Z
Zhu Yi 已提交
4518 4519 4520 4521 4522 4523
	spin_unlock(&priv->lock);

	return IRQ_HANDLED;

 none:
	/* re-enable interrupts here since we don't have anything to service. */
4524 4525 4526
	/* only Re-enable if disabled by irq */
	if (test_bit(STATUS_INT_ENABLED, &priv->status))
		iwl3945_enable_interrupts(priv);
Z
Zhu Yi 已提交
4527 4528 4529 4530 4531 4532
	spin_unlock(&priv->lock);
	return IRQ_NONE;
}

/************************** EEPROM BANDS ****************************
 *
C
Christoph Hellwig 已提交
4533
 * The iwl3945_eeprom_band definitions below provide the mapping from the
Z
Zhu Yi 已提交
4534 4535 4536
 * EEPROM contents to the specific channel number supported for each
 * band.
 *
C
Christoph Hellwig 已提交
4537
 * For example, iwl3945_priv->eeprom.band_3_channels[4] from the band_3
Z
Zhu Yi 已提交
4538 4539 4540 4541 4542 4543 4544 4545 4546 4547 4548 4549 4550 4551 4552 4553 4554 4555 4556 4557 4558 4559 4560 4561 4562
 * definition below maps to physical channel 42 in the 5.2GHz spectrum.
 * The specific geography and calibration information for that channel
 * is contained in the eeprom map itself.
 *
 * During init, we copy the eeprom information and channel map
 * information into priv->channel_info_24/52 and priv->channel_map_24/52
 *
 * channel_map_24/52 provides the index in the channel_info array for a
 * given channel.  We have to have two separate maps as there is channel
 * overlap with the 2.4GHz and 5.2GHz spectrum as seen in band_1 and
 * band_2
 *
 * A value of 0xff stored in the channel_map indicates that the channel
 * is not supported by the hardware at all.
 *
 * A value of 0xfe in the channel_map indicates that the channel is not
 * valid for Tx with the current hardware.  This means that
 * while the system can tune and receive on a given channel, it may not
 * be able to associate or transmit any frames on that
 * channel.  There is no corresponding channel information for that
 * entry.
 *
 *********************************************************************/

/* 2.4 GHz */
C
Christoph Hellwig 已提交
4563
static const u8 iwl3945_eeprom_band_1[14] = {
Z
Zhu Yi 已提交
4564 4565 4566 4567
	1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14
};

/* 5.2 GHz bands */
4568
static const u8 iwl3945_eeprom_band_2[] = {	/* 4915-5080MHz */
Z
Zhu Yi 已提交
4569 4570 4571
	183, 184, 185, 187, 188, 189, 192, 196, 7, 8, 11, 12, 16
};

4572
static const u8 iwl3945_eeprom_band_3[] = {	/* 5170-5320MHz */
Z
Zhu Yi 已提交
4573 4574 4575
	34, 36, 38, 40, 42, 44, 46, 48, 52, 56, 60, 64
};

C
Christoph Hellwig 已提交
4576
static const u8 iwl3945_eeprom_band_4[] = {	/* 5500-5700MHz */
Z
Zhu Yi 已提交
4577 4578 4579
	100, 104, 108, 112, 116, 120, 124, 128, 132, 136, 140
};

C
Christoph Hellwig 已提交
4580
static const u8 iwl3945_eeprom_band_5[] = {	/* 5725-5825MHz */
Z
Zhu Yi 已提交
4581 4582 4583
	145, 149, 153, 157, 161, 165
};

C
Christoph Hellwig 已提交
4584
static void iwl3945_init_band_reference(const struct iwl3945_priv *priv, int band,
Z
Zhu Yi 已提交
4585
				    int *eeprom_ch_count,
C
Christoph Hellwig 已提交
4586
				    const struct iwl3945_eeprom_channel
Z
Zhu Yi 已提交
4587 4588 4589 4590 4591
				    **eeprom_ch_info,
				    const u8 **eeprom_ch_index)
{
	switch (band) {
	case 1:		/* 2.4GHz band */
C
Christoph Hellwig 已提交
4592
		*eeprom_ch_count = ARRAY_SIZE(iwl3945_eeprom_band_1);
Z
Zhu Yi 已提交
4593
		*eeprom_ch_info = priv->eeprom.band_1_channels;
C
Christoph Hellwig 已提交
4594
		*eeprom_ch_index = iwl3945_eeprom_band_1;
Z
Zhu Yi 已提交
4595
		break;
4596
	case 2:		/* 4.9GHz band */
C
Christoph Hellwig 已提交
4597
		*eeprom_ch_count = ARRAY_SIZE(iwl3945_eeprom_band_2);
Z
Zhu Yi 已提交
4598
		*eeprom_ch_info = priv->eeprom.band_2_channels;
C
Christoph Hellwig 已提交
4599
		*eeprom_ch_index = iwl3945_eeprom_band_2;
Z
Zhu Yi 已提交
4600 4601
		break;
	case 3:		/* 5.2GHz band */
C
Christoph Hellwig 已提交
4602
		*eeprom_ch_count = ARRAY_SIZE(iwl3945_eeprom_band_3);
Z
Zhu Yi 已提交
4603
		*eeprom_ch_info = priv->eeprom.band_3_channels;
C
Christoph Hellwig 已提交
4604
		*eeprom_ch_index = iwl3945_eeprom_band_3;
Z
Zhu Yi 已提交
4605
		break;
4606
	case 4:		/* 5.5GHz band */
C
Christoph Hellwig 已提交
4607
		*eeprom_ch_count = ARRAY_SIZE(iwl3945_eeprom_band_4);
Z
Zhu Yi 已提交
4608
		*eeprom_ch_info = priv->eeprom.band_4_channels;
C
Christoph Hellwig 已提交
4609
		*eeprom_ch_index = iwl3945_eeprom_band_4;
Z
Zhu Yi 已提交
4610
		break;
4611
	case 5:		/* 5.7GHz band */
C
Christoph Hellwig 已提交
4612
		*eeprom_ch_count = ARRAY_SIZE(iwl3945_eeprom_band_5);
Z
Zhu Yi 已提交
4613
		*eeprom_ch_info = priv->eeprom.band_5_channels;
C
Christoph Hellwig 已提交
4614
		*eeprom_ch_index = iwl3945_eeprom_band_5;
Z
Zhu Yi 已提交
4615 4616 4617 4618 4619 4620 4621
		break;
	default:
		BUG();
		return;
	}
}

4622 4623 4624 4625 4626
/**
 * iwl3945_get_channel_info - Find driver's private channel info
 *
 * Based on band and channel number.
 */
C
Christoph Hellwig 已提交
4627
const struct iwl3945_channel_info *iwl3945_get_channel_info(const struct iwl3945_priv *priv,
4628
						    enum ieee80211_band band, u16 channel)
Z
Zhu Yi 已提交
4629 4630 4631
{
	int i;

4632 4633
	switch (band) {
	case IEEE80211_BAND_5GHZ:
Z
Zhu Yi 已提交
4634 4635 4636 4637 4638 4639
		for (i = 14; i < priv->channel_count; i++) {
			if (priv->channel_info[i].channel == channel)
				return &priv->channel_info[i];
		}
		break;

4640
	case IEEE80211_BAND_2GHZ:
Z
Zhu Yi 已提交
4641 4642 4643
		if (channel >= 1 && channel <= 14)
			return &priv->channel_info[channel - 1];
		break;
4644 4645
	case IEEE80211_NUM_BANDS:
		WARN_ON(1);
Z
Zhu Yi 已提交
4646 4647 4648 4649 4650 4651 4652 4653
	}

	return NULL;
}

#define CHECK_AND_PRINT(x) ((eeprom_ch_info[ch].flags & EEPROM_CHANNEL_##x) \
			    ? # x " " : "")

4654 4655 4656
/**
 * iwl3945_init_channel_map - Set up driver's info for all possible channels
 */
C
Christoph Hellwig 已提交
4657
static int iwl3945_init_channel_map(struct iwl3945_priv *priv)
Z
Zhu Yi 已提交
4658 4659 4660
{
	int eeprom_ch_count = 0;
	const u8 *eeprom_ch_index = NULL;
C
Christoph Hellwig 已提交
4661
	const struct iwl3945_eeprom_channel *eeprom_ch_info = NULL;
Z
Zhu Yi 已提交
4662
	int band, ch;
C
Christoph Hellwig 已提交
4663
	struct iwl3945_channel_info *ch_info;
Z
Zhu Yi 已提交
4664 4665 4666 4667 4668 4669 4670 4671 4672 4673 4674 4675 4676 4677 4678

	if (priv->channel_count) {
		IWL_DEBUG_INFO("Channel map already initialized.\n");
		return 0;
	}

	if (priv->eeprom.version < 0x2f) {
		IWL_WARNING("Unsupported EEPROM version: 0x%04X\n",
			    priv->eeprom.version);
		return -EINVAL;
	}

	IWL_DEBUG_INFO("Initializing regulatory info from EEPROM\n");

	priv->channel_count =
C
Christoph Hellwig 已提交
4679 4680 4681 4682 4683
	    ARRAY_SIZE(iwl3945_eeprom_band_1) +
	    ARRAY_SIZE(iwl3945_eeprom_band_2) +
	    ARRAY_SIZE(iwl3945_eeprom_band_3) +
	    ARRAY_SIZE(iwl3945_eeprom_band_4) +
	    ARRAY_SIZE(iwl3945_eeprom_band_5);
Z
Zhu Yi 已提交
4684 4685 4686

	IWL_DEBUG_INFO("Parsing data for %d channels.\n", priv->channel_count);

C
Christoph Hellwig 已提交
4687
	priv->channel_info = kzalloc(sizeof(struct iwl3945_channel_info) *
Z
Zhu Yi 已提交
4688 4689 4690 4691 4692 4693 4694 4695 4696 4697 4698 4699 4700 4701
				     priv->channel_count, GFP_KERNEL);
	if (!priv->channel_info) {
		IWL_ERROR("Could not allocate channel_info\n");
		priv->channel_count = 0;
		return -ENOMEM;
	}

	ch_info = priv->channel_info;

	/* Loop through the 5 EEPROM bands adding them in order to the
	 * channel map we maintain (that contains additional information than
	 * what just in the EEPROM) */
	for (band = 1; band <= 5; band++) {

C
Christoph Hellwig 已提交
4702
		iwl3945_init_band_reference(priv, band, &eeprom_ch_count,
Z
Zhu Yi 已提交
4703 4704 4705 4706 4707
					&eeprom_ch_info, &eeprom_ch_index);

		/* Loop through each band adding each of the channels */
		for (ch = 0; ch < eeprom_ch_count; ch++) {
			ch_info->channel = eeprom_ch_index[ch];
4708 4709
			ch_info->band = (band == 1) ? IEEE80211_BAND_2GHZ :
			    IEEE80211_BAND_5GHZ;
Z
Zhu Yi 已提交
4710 4711 4712 4713 4714 4715 4716 4717 4718 4719 4720 4721 4722 4723 4724 4725 4726 4727 4728 4729 4730 4731 4732 4733 4734 4735

			/* permanently store EEPROM's channel regulatory flags
			 *   and max power in channel info database. */
			ch_info->eeprom = eeprom_ch_info[ch];

			/* Copy the run-time flags so they are there even on
			 * invalid channels */
			ch_info->flags = eeprom_ch_info[ch].flags;

			if (!(is_channel_valid(ch_info))) {
				IWL_DEBUG_INFO("Ch. %d Flags %x [%sGHz] - "
					       "No traffic\n",
					       ch_info->channel,
					       ch_info->flags,
					       is_channel_a_band(ch_info) ?
					       "5.2" : "2.4");
				ch_info++;
				continue;
			}

			/* Initialize regulatory-based run-time data */
			ch_info->max_power_avg = ch_info->curr_txpow =
			    eeprom_ch_info[ch].max_power_avg;
			ch_info->scan_power = eeprom_ch_info[ch].max_power_avg;
			ch_info->min_power = 0;

4736
			IWL_DEBUG_INFO("Ch. %d [%sGHz] %s%s%s%s%s%s(0x%02x"
Z
Zhu Yi 已提交
4737 4738 4739 4740
				       " %ddBm): Ad-Hoc %ssupported\n",
				       ch_info->channel,
				       is_channel_a_band(ch_info) ?
				       "5.2" : "2.4",
4741
				       CHECK_AND_PRINT(VALID),
Z
Zhu Yi 已提交
4742 4743 4744 4745 4746 4747 4748 4749 4750 4751 4752 4753 4754 4755 4756 4757 4758 4759 4760 4761 4762 4763 4764 4765
				       CHECK_AND_PRINT(IBSS),
				       CHECK_AND_PRINT(ACTIVE),
				       CHECK_AND_PRINT(RADAR),
				       CHECK_AND_PRINT(WIDE),
				       CHECK_AND_PRINT(DFS),
				       eeprom_ch_info[ch].flags,
				       eeprom_ch_info[ch].max_power_avg,
				       ((eeprom_ch_info[ch].
					 flags & EEPROM_CHANNEL_IBSS)
					&& !(eeprom_ch_info[ch].
					     flags & EEPROM_CHANNEL_RADAR))
				       ? "" : "not ");

			/* Set the user_txpower_limit to the highest power
			 * supported by any channel */
			if (eeprom_ch_info[ch].max_power_avg >
			    priv->user_txpower_limit)
				priv->user_txpower_limit =
				    eeprom_ch_info[ch].max_power_avg;

			ch_info++;
		}
	}

4766
	/* Set up txpower settings in driver for all channels */
Z
Zhu Yi 已提交
4767 4768 4769 4770 4771 4772
	if (iwl3945_txpower_set_from_eeprom(priv))
		return -EIO;

	return 0;
}

4773 4774 4775 4776 4777 4778 4779 4780 4781
/*
 * iwl3945_free_channel_map - undo allocations in iwl3945_init_channel_map
 */
static void iwl3945_free_channel_map(struct iwl3945_priv *priv)
{
	kfree(priv->channel_info);
	priv->channel_count = 0;
}

Z
Zhu Yi 已提交
4782 4783 4784 4785 4786 4787 4788 4789 4790 4791 4792 4793 4794 4795 4796 4797 4798 4799 4800 4801 4802 4803 4804
/* For active scan, listen ACTIVE_DWELL_TIME (msec) on each channel after
 * sending probe req.  This should be set long enough to hear probe responses
 * from more than one AP.  */
#define IWL_ACTIVE_DWELL_TIME_24    (20)	/* all times in msec */
#define IWL_ACTIVE_DWELL_TIME_52    (10)

/* For faster active scanning, scan will move to the next channel if fewer than
 * PLCP_QUIET_THRESH packets are heard on this channel within
 * ACTIVE_QUIET_TIME after sending probe request.  This shortens the dwell
 * time if it's a quiet channel (nothing responded to our probe, and there's
 * no other traffic).
 * Disable "quiet" feature by setting PLCP_QUIET_THRESH to 0. */
#define IWL_PLCP_QUIET_THRESH       __constant_cpu_to_le16(1)	/* packets */
#define IWL_ACTIVE_QUIET_TIME       __constant_cpu_to_le16(5)	/* msec */

/* For passive scan, listen PASSIVE_DWELL_TIME (msec) on each channel.
 * Must be set longer than active dwell time.
 * For the most reliable scan, set > AP beacon interval (typically 100msec). */
#define IWL_PASSIVE_DWELL_TIME_24   (20)	/* all times in msec */
#define IWL_PASSIVE_DWELL_TIME_52   (10)
#define IWL_PASSIVE_DWELL_BASE      (100)
#define IWL_CHANNEL_TUNE_TIME       5

4805 4806
static inline u16 iwl3945_get_active_dwell_time(struct iwl3945_priv *priv,
						enum ieee80211_band band)
Z
Zhu Yi 已提交
4807
{
4808
	if (band == IEEE80211_BAND_5GHZ)
Z
Zhu Yi 已提交
4809 4810 4811 4812 4813
		return IWL_ACTIVE_DWELL_TIME_52;
	else
		return IWL_ACTIVE_DWELL_TIME_24;
}

4814 4815
static u16 iwl3945_get_passive_dwell_time(struct iwl3945_priv *priv,
					  enum ieee80211_band band)
Z
Zhu Yi 已提交
4816
{
4817 4818
	u16 active = iwl3945_get_active_dwell_time(priv, band);
	u16 passive = (band == IEEE80211_BAND_2GHZ) ?
Z
Zhu Yi 已提交
4819 4820 4821
	    IWL_PASSIVE_DWELL_BASE + IWL_PASSIVE_DWELL_TIME_24 :
	    IWL_PASSIVE_DWELL_BASE + IWL_PASSIVE_DWELL_TIME_52;

C
Christoph Hellwig 已提交
4822
	if (iwl3945_is_associated(priv)) {
Z
Zhu Yi 已提交
4823 4824 4825 4826 4827 4828 4829 4830 4831 4832 4833 4834 4835 4836 4837
		/* If we're associated, we clamp the maximum passive
		 * dwell time to be 98% of the beacon interval (minus
		 * 2 * channel tune time) */
		passive = priv->beacon_int;
		if ((passive > IWL_PASSIVE_DWELL_BASE) || !passive)
			passive = IWL_PASSIVE_DWELL_BASE;
		passive = (passive * 98) / 100 - IWL_CHANNEL_TUNE_TIME * 2;
	}

	if (passive <= active)
		passive = active + 1;

	return passive;
}

4838 4839
static int iwl3945_get_channels_for_scan(struct iwl3945_priv *priv,
					 enum ieee80211_band band,
Z
Zhu Yi 已提交
4840
				     u8 is_active, u8 direct_mask,
C
Christoph Hellwig 已提交
4841
				     struct iwl3945_scan_channel *scan_ch)
Z
Zhu Yi 已提交
4842 4843
{
	const struct ieee80211_channel *channels = NULL;
4844
	const struct ieee80211_supported_band *sband;
C
Christoph Hellwig 已提交
4845
	const struct iwl3945_channel_info *ch_info;
Z
Zhu Yi 已提交
4846 4847 4848 4849
	u16 passive_dwell = 0;
	u16 active_dwell = 0;
	int added, i;

4850 4851
	sband = iwl3945_get_band(priv, band);
	if (!sband)
Z
Zhu Yi 已提交
4852 4853
		return 0;

4854
	channels = sband->channels;
Z
Zhu Yi 已提交
4855

4856 4857
	active_dwell = iwl3945_get_active_dwell_time(priv, band);
	passive_dwell = iwl3945_get_passive_dwell_time(priv, band);
Z
Zhu Yi 已提交
4858

4859
	for (i = 0, added = 0; i < sband->n_channels; i++) {
4860 4861 4862
		if (channels[i].flags & IEEE80211_CHAN_DISABLED)
			continue;

4863
		scan_ch->channel = channels[i].hw_value;
Z
Zhu Yi 已提交
4864

4865
		ch_info = iwl3945_get_channel_info(priv, band, scan_ch->channel);
Z
Zhu Yi 已提交
4866
		if (!is_channel_valid(ch_info)) {
4867
			IWL_DEBUG_SCAN("Channel %d is INVALID for this band.\n",
Z
Zhu Yi 已提交
4868 4869 4870 4871 4872
				       scan_ch->channel);
			continue;
		}

		if (!is_active || is_channel_passive(ch_info) ||
4873
		    (channels[i].flags & IEEE80211_CHAN_PASSIVE_SCAN))
Z
Zhu Yi 已提交
4874 4875 4876 4877 4878 4879 4880 4881 4882 4883
			scan_ch->type = 0;	/* passive */
		else
			scan_ch->type = 1;	/* active */

		if (scan_ch->type & 1)
			scan_ch->type |= (direct_mask << 1);

		scan_ch->active_dwell = cpu_to_le16(active_dwell);
		scan_ch->passive_dwell = cpu_to_le16(passive_dwell);

4884
		/* Set txpower levels to defaults */
Z
Zhu Yi 已提交
4885 4886 4887 4888
		scan_ch->tpc.dsp_atten = 110;
		/* scan_pwr_info->tpc.dsp_atten; */

		/*scan_pwr_info->tpc.tx_gain; */
4889
		if (band == IEEE80211_BAND_5GHZ)
Z
Zhu Yi 已提交
4890 4891 4892 4893
			scan_ch->tpc.tx_gain = ((1 << 5) | (3 << 3)) | 3;
		else {
			scan_ch->tpc.tx_gain = ((1 << 5) | (5 << 3));
			/* NOTE: if we were doing 6Mb OFDM for scans we'd use
4894
			 * power level:
4895
			 * scan_ch->tpc.tx_gain = ((1 << 5) | (2 << 3)) | 3;
Z
Zhu Yi 已提交
4896 4897 4898 4899 4900 4901 4902 4903 4904 4905 4906 4907 4908 4909 4910 4911 4912
			 */
		}

		IWL_DEBUG_SCAN("Scanning %d [%s %d]\n",
			       scan_ch->channel,
			       (scan_ch->type & 1) ? "ACTIVE" : "PASSIVE",
			       (scan_ch->type & 1) ?
			       active_dwell : passive_dwell);

		scan_ch++;
		added++;
	}

	IWL_DEBUG_SCAN("total channels to scan %d \n", added);
	return added;
}

C
Christoph Hellwig 已提交
4913
static void iwl3945_init_hw_rates(struct iwl3945_priv *priv,
Z
Zhu Yi 已提交
4914 4915 4916 4917 4918
			      struct ieee80211_rate *rates)
{
	int i;

	for (i = 0; i < IWL_RATE_COUNT; i++) {
4919 4920 4921 4922 4923
		rates[i].bitrate = iwl3945_rates[i].ieee * 5;
		rates[i].hw_value = i; /* Rate scaling will work on indexes */
		rates[i].hw_value_short = i;
		rates[i].flags = 0;
		if ((i > IWL_LAST_OFDM_RATE) || (i < IWL_FIRST_OFDM_RATE)) {
Z
Zhu Yi 已提交
4924
			/*
4925
			 * If CCK != 1M then set short preamble rate flag.
Z
Zhu Yi 已提交
4926
			 */
C
Christoph Hellwig 已提交
4927
			rates[i].flags |= (iwl3945_rates[i].plcp == 10) ?
4928
				0 : IEEE80211_RATE_SHORT_PREAMBLE;
Z
Zhu Yi 已提交
4929 4930 4931 4932 4933
		}
	}
}

/**
C
Christoph Hellwig 已提交
4934
 * iwl3945_init_geos - Initialize mac80211's geo/channel info based from eeprom
Z
Zhu Yi 已提交
4935
 */
C
Christoph Hellwig 已提交
4936
static int iwl3945_init_geos(struct iwl3945_priv *priv)
Z
Zhu Yi 已提交
4937
{
C
Christoph Hellwig 已提交
4938
	struct iwl3945_channel_info *ch;
4939
	struct ieee80211_supported_band *sband;
Z
Zhu Yi 已提交
4940 4941 4942 4943 4944
	struct ieee80211_channel *channels;
	struct ieee80211_channel *geo_ch;
	struct ieee80211_rate *rates;
	int i = 0;

4945 4946
	if (priv->bands[IEEE80211_BAND_2GHZ].n_bitrates ||
	    priv->bands[IEEE80211_BAND_5GHZ].n_bitrates) {
Z
Zhu Yi 已提交
4947 4948 4949 4950 4951 4952 4953
		IWL_DEBUG_INFO("Geography modes already initialized.\n");
		set_bit(STATUS_GEO_CONFIGURED, &priv->status);
		return 0;
	}

	channels = kzalloc(sizeof(struct ieee80211_channel) *
			   priv->channel_count, GFP_KERNEL);
4954
	if (!channels)
Z
Zhu Yi 已提交
4955 4956
		return -ENOMEM;

4957
	rates = kzalloc((sizeof(struct ieee80211_rate) * (IWL_RATE_COUNT + 1)),
Z
Zhu Yi 已提交
4958 4959 4960 4961 4962 4963 4964
			GFP_KERNEL);
	if (!rates) {
		kfree(channels);
		return -ENOMEM;
	}

	/* 5.2GHz channels start after the 2.4GHz channels */
4965 4966 4967 4968 4969 4970 4971 4972 4973 4974 4975
	sband = &priv->bands[IEEE80211_BAND_5GHZ];
	sband->channels = &channels[ARRAY_SIZE(iwl3945_eeprom_band_1)];
	/* just OFDM */
	sband->bitrates = &rates[IWL_FIRST_OFDM_RATE];
	sband->n_bitrates = IWL_RATE_COUNT - IWL_FIRST_OFDM_RATE;

	sband = &priv->bands[IEEE80211_BAND_2GHZ];
	sband->channels = channels;
	/* OFDM & CCK */
	sband->bitrates = rates;
	sband->n_bitrates = IWL_RATE_COUNT;
Z
Zhu Yi 已提交
4976 4977 4978 4979

	priv->ieee_channels = channels;
	priv->ieee_rates = rates;

C
Christoph Hellwig 已提交
4980
	iwl3945_init_hw_rates(priv, rates);
Z
Zhu Yi 已提交
4981

4982
	for (i = 0;  i < priv->channel_count; i++) {
Z
Zhu Yi 已提交
4983 4984
		ch = &priv->channel_info[i];

4985 4986
		/* FIXME: might be removed if scan is OK*/
		if (!is_channel_valid(ch))
Z
Zhu Yi 已提交
4987 4988 4989
			continue;

		if (is_channel_a_band(ch))
4990
			sband =  &priv->bands[IEEE80211_BAND_5GHZ];
4991
		else
4992
			sband =  &priv->bands[IEEE80211_BAND_2GHZ];
Z
Zhu Yi 已提交
4993

4994 4995 4996
		geo_ch = &sband->channels[sband->n_channels++];

		geo_ch->center_freq = ieee80211_channel_to_frequency(ch->channel);
4997 4998
		geo_ch->max_power = ch->max_power_avg;
		geo_ch->max_antenna_gain = 0xff;
4999
		geo_ch->hw_value = ch->channel;
Z
Zhu Yi 已提交
5000 5001

		if (is_channel_valid(ch)) {
5002 5003
			if (!(ch->flags & EEPROM_CHANNEL_IBSS))
				geo_ch->flags |= IEEE80211_CHAN_NO_IBSS;
Z
Zhu Yi 已提交
5004

5005 5006
			if (!(ch->flags & EEPROM_CHANNEL_ACTIVE))
				geo_ch->flags |= IEEE80211_CHAN_PASSIVE_SCAN;
Z
Zhu Yi 已提交
5007 5008

			if (ch->flags & EEPROM_CHANNEL_RADAR)
5009
				geo_ch->flags |= IEEE80211_CHAN_RADAR;
Z
Zhu Yi 已提交
5010 5011 5012 5013

			if (ch->max_power_avg > priv->max_channel_txpower_limit)
				priv->max_channel_txpower_limit =
				    ch->max_power_avg;
5014
		} else {
5015
			geo_ch->flags |= IEEE80211_CHAN_DISABLED;
5016 5017 5018 5019 5020 5021 5022 5023 5024 5025 5026
		}

		/* Save flags for reg domain usage */
		geo_ch->orig_flags = geo_ch->flags;

		IWL_DEBUG_INFO("Channel %d Freq=%d[%sGHz] %s flag=0%X\n",
				ch->channel, geo_ch->center_freq,
				is_channel_a_band(ch) ?  "5.2" : "2.4",
				geo_ch->flags & IEEE80211_CHAN_DISABLED ?
				"restricted" : "valid",
				 geo_ch->flags);
Z
Zhu Yi 已提交
5027 5028
	}

T
Tomas Winkler 已提交
5029 5030
	if ((priv->bands[IEEE80211_BAND_5GHZ].n_channels == 0) &&
	     priv->cfg->sku & IWL_SKU_A) {
Z
Zhu Yi 已提交
5031 5032 5033 5034
		printk(KERN_INFO DRV_NAME
		       ": Incorrectly detected BG card as ABG.  Please send "
		       "your PCI ID 0x%04X:0x%04X to maintainer.\n",
		       priv->pci_dev->device, priv->pci_dev->subsystem_device);
T
Tomas Winkler 已提交
5035
		 priv->cfg->sku &= ~IWL_SKU_A;
Z
Zhu Yi 已提交
5036 5037 5038 5039
	}

	printk(KERN_INFO DRV_NAME
	       ": Tunable channels: %d 802.11bg, %d 802.11a channels\n",
5040 5041
	       priv->bands[IEEE80211_BAND_2GHZ].n_channels,
	       priv->bands[IEEE80211_BAND_5GHZ].n_channels);
Z
Zhu Yi 已提交
5042

5043 5044 5045 5046 5047 5048
	if (priv->bands[IEEE80211_BAND_2GHZ].n_channels)
		priv->hw->wiphy->bands[IEEE80211_BAND_2GHZ] =
			&priv->bands[IEEE80211_BAND_2GHZ];
	if (priv->bands[IEEE80211_BAND_5GHZ].n_channels)
		priv->hw->wiphy->bands[IEEE80211_BAND_5GHZ] =
			&priv->bands[IEEE80211_BAND_5GHZ];
Z
Zhu Yi 已提交
5049 5050 5051 5052 5053 5054

	set_bit(STATUS_GEO_CONFIGURED, &priv->status);

	return 0;
}

5055 5056 5057 5058 5059 5060 5061 5062 5063 5064
/*
 * iwl3945_free_geos - undo allocations in iwl3945_init_geos
 */
static void iwl3945_free_geos(struct iwl3945_priv *priv)
{
	kfree(priv->ieee_channels);
	kfree(priv->ieee_rates);
	clear_bit(STATUS_GEO_CONFIGURED, &priv->status);
}

Z
Zhu Yi 已提交
5065 5066 5067 5068 5069 5070
/******************************************************************************
 *
 * uCode download functions
 *
 ******************************************************************************/

C
Christoph Hellwig 已提交
5071
static void iwl3945_dealloc_ucode_pci(struct iwl3945_priv *priv)
Z
Zhu Yi 已提交
5072
{
5073 5074 5075 5076 5077 5078
	iwl_free_fw_desc(priv->pci_dev, &priv->ucode_code);
	iwl_free_fw_desc(priv->pci_dev, &priv->ucode_data);
	iwl_free_fw_desc(priv->pci_dev, &priv->ucode_data_backup);
	iwl_free_fw_desc(priv->pci_dev, &priv->ucode_init);
	iwl_free_fw_desc(priv->pci_dev, &priv->ucode_init_data);
	iwl_free_fw_desc(priv->pci_dev, &priv->ucode_boot);
Z
Zhu Yi 已提交
5079 5080 5081
}

/**
C
Christoph Hellwig 已提交
5082
 * iwl3945_verify_inst_full - verify runtime uCode image in card vs. host,
Z
Zhu Yi 已提交
5083 5084
 *     looking at all data.
 */
5085
static int iwl3945_verify_inst_full(struct iwl3945_priv *priv, __le32 *image, u32 len)
Z
Zhu Yi 已提交
5086 5087 5088 5089 5090 5091 5092 5093
{
	u32 val;
	u32 save_len = len;
	int rc = 0;
	u32 errcnt;

	IWL_DEBUG_INFO("ucode inst image size is %u\n", len);

C
Christoph Hellwig 已提交
5094
	rc = iwl3945_grab_nic_access(priv);
Z
Zhu Yi 已提交
5095 5096 5097
	if (rc)
		return rc;

C
Christoph Hellwig 已提交
5098
	iwl3945_write_direct32(priv, HBUS_TARG_MEM_RADDR, RTC_INST_LOWER_BOUND);
Z
Zhu Yi 已提交
5099 5100 5101 5102 5103 5104

	errcnt = 0;
	for (; len > 0; len -= sizeof(u32), image++) {
		/* read data comes through single port, auto-incr addr */
		/* NOTE: Use the debugless read so we don't flood kernel log
		 * if IWL_DL_IO is set */
C
Christoph Hellwig 已提交
5105
		val = _iwl3945_read_direct32(priv, HBUS_TARG_MEM_RDAT);
Z
Zhu Yi 已提交
5106 5107 5108 5109 5110 5111 5112 5113 5114 5115 5116
		if (val != le32_to_cpu(*image)) {
			IWL_ERROR("uCode INST section is invalid at "
				  "offset 0x%x, is 0x%x, s/b 0x%x\n",
				  save_len - len, val, le32_to_cpu(*image));
			rc = -EIO;
			errcnt++;
			if (errcnt >= 20)
				break;
		}
	}

C
Christoph Hellwig 已提交
5117
	iwl3945_release_nic_access(priv);
Z
Zhu Yi 已提交
5118 5119

	if (!errcnt)
5120
		IWL_DEBUG_INFO("ucode image in INSTRUCTION memory is good\n");
Z
Zhu Yi 已提交
5121 5122 5123 5124 5125 5126

	return rc;
}


/**
C
Christoph Hellwig 已提交
5127
 * iwl3945_verify_inst_sparse - verify runtime uCode image in card vs. host,
Z
Zhu Yi 已提交
5128 5129 5130
 *   using sample data 100 bytes apart.  If these sample points are good,
 *   it's a pretty good bet that everything between them is good, too.
 */
C
Christoph Hellwig 已提交
5131
static int iwl3945_verify_inst_sparse(struct iwl3945_priv *priv, __le32 *image, u32 len)
Z
Zhu Yi 已提交
5132 5133 5134 5135 5136 5137 5138 5139
{
	u32 val;
	int rc = 0;
	u32 errcnt = 0;
	u32 i;

	IWL_DEBUG_INFO("ucode inst image size is %u\n", len);

C
Christoph Hellwig 已提交
5140
	rc = iwl3945_grab_nic_access(priv);
Z
Zhu Yi 已提交
5141 5142 5143 5144 5145 5146 5147
	if (rc)
		return rc;

	for (i = 0; i < len; i += 100, image += 100/sizeof(u32)) {
		/* read data comes through single port, auto-incr addr */
		/* NOTE: Use the debugless read so we don't flood kernel log
		 * if IWL_DL_IO is set */
C
Christoph Hellwig 已提交
5148
		iwl3945_write_direct32(priv, HBUS_TARG_MEM_RADDR,
Z
Zhu Yi 已提交
5149
			i + RTC_INST_LOWER_BOUND);
C
Christoph Hellwig 已提交
5150
		val = _iwl3945_read_direct32(priv, HBUS_TARG_MEM_RDAT);
Z
Zhu Yi 已提交
5151 5152 5153 5154 5155 5156 5157 5158 5159 5160 5161 5162 5163
		if (val != le32_to_cpu(*image)) {
#if 0 /* Enable this if you want to see details */
			IWL_ERROR("uCode INST section is invalid at "
				  "offset 0x%x, is 0x%x, s/b 0x%x\n",
				  i, val, *image);
#endif
			rc = -EIO;
			errcnt++;
			if (errcnt >= 3)
				break;
		}
	}

C
Christoph Hellwig 已提交
5164
	iwl3945_release_nic_access(priv);
Z
Zhu Yi 已提交
5165 5166 5167 5168 5169 5170

	return rc;
}


/**
C
Christoph Hellwig 已提交
5171
 * iwl3945_verify_ucode - determine which instruction image is in SRAM,
Z
Zhu Yi 已提交
5172 5173
 *    and verify its contents
 */
C
Christoph Hellwig 已提交
5174
static int iwl3945_verify_ucode(struct iwl3945_priv *priv)
Z
Zhu Yi 已提交
5175 5176 5177 5178 5179 5180 5181 5182
{
	__le32 *image;
	u32 len;
	int rc = 0;

	/* Try bootstrap */
	image = (__le32 *)priv->ucode_boot.v_addr;
	len = priv->ucode_boot.len;
C
Christoph Hellwig 已提交
5183
	rc = iwl3945_verify_inst_sparse(priv, image, len);
Z
Zhu Yi 已提交
5184 5185 5186 5187 5188 5189 5190 5191
	if (rc == 0) {
		IWL_DEBUG_INFO("Bootstrap uCode is good in inst SRAM\n");
		return 0;
	}

	/* Try initialize */
	image = (__le32 *)priv->ucode_init.v_addr;
	len = priv->ucode_init.len;
C
Christoph Hellwig 已提交
5192
	rc = iwl3945_verify_inst_sparse(priv, image, len);
Z
Zhu Yi 已提交
5193 5194 5195 5196 5197 5198 5199 5200
	if (rc == 0) {
		IWL_DEBUG_INFO("Initialize uCode is good in inst SRAM\n");
		return 0;
	}

	/* Try runtime/protocol */
	image = (__le32 *)priv->ucode_code.v_addr;
	len = priv->ucode_code.len;
C
Christoph Hellwig 已提交
5201
	rc = iwl3945_verify_inst_sparse(priv, image, len);
Z
Zhu Yi 已提交
5202 5203 5204 5205 5206 5207 5208
	if (rc == 0) {
		IWL_DEBUG_INFO("Runtime uCode is good in inst SRAM\n");
		return 0;
	}

	IWL_ERROR("NO VALID UCODE IMAGE IN INSTRUCTION SRAM!!\n");

5209 5210 5211
	/* Since nothing seems to match, show first several data entries in
	 * instruction SRAM, so maybe visual inspection will give a clue.
	 * Selection of bootstrap image (vs. other images) is arbitrary. */
Z
Zhu Yi 已提交
5212 5213
	image = (__le32 *)priv->ucode_boot.v_addr;
	len = priv->ucode_boot.len;
C
Christoph Hellwig 已提交
5214
	rc = iwl3945_verify_inst_full(priv, image, len);
Z
Zhu Yi 已提交
5215 5216 5217 5218 5219 5220

	return rc;
}


/* check contents of special bootstrap uCode SRAM */
C
Christoph Hellwig 已提交
5221
static int iwl3945_verify_bsm(struct iwl3945_priv *priv)
Z
Zhu Yi 已提交
5222 5223 5224 5225 5226 5227 5228 5229 5230
{
	__le32 *image = priv->ucode_boot.v_addr;
	u32 len = priv->ucode_boot.len;
	u32 reg;
	u32 val;

	IWL_DEBUG_INFO("Begin verify bsm\n");

	/* verify BSM SRAM contents */
C
Christoph Hellwig 已提交
5231
	val = iwl3945_read_prph(priv, BSM_WR_DWCOUNT_REG);
Z
Zhu Yi 已提交
5232 5233
	for (reg = BSM_SRAM_LOWER_BOUND;
	     reg < BSM_SRAM_LOWER_BOUND + len;
5234
	     reg += sizeof(u32), image++) {
C
Christoph Hellwig 已提交
5235
		val = iwl3945_read_prph(priv, reg);
Z
Zhu Yi 已提交
5236 5237 5238 5239 5240 5241 5242 5243 5244 5245 5246 5247 5248 5249 5250 5251
		if (val != le32_to_cpu(*image)) {
			IWL_ERROR("BSM uCode verification failed at "
				  "addr 0x%08X+%u (of %u), is 0x%x, s/b 0x%x\n",
				  BSM_SRAM_LOWER_BOUND,
				  reg - BSM_SRAM_LOWER_BOUND, len,
				  val, le32_to_cpu(*image));
			return -EIO;
		}
	}

	IWL_DEBUG_INFO("BSM bootstrap uCode image OK\n");

	return 0;
}

/**
C
Christoph Hellwig 已提交
5252
 * iwl3945_load_bsm - Load bootstrap instructions
Z
Zhu Yi 已提交
5253 5254 5255 5256 5257 5258 5259 5260 5261 5262 5263 5264 5265 5266 5267 5268 5269 5270 5271 5272 5273 5274 5275 5276 5277 5278 5279 5280 5281 5282
 *
 * BSM operation:
 *
 * The Bootstrap State Machine (BSM) stores a short bootstrap uCode program
 * in special SRAM that does not power down during RFKILL.  When powering back
 * up after power-saving sleeps (or during initial uCode load), the BSM loads
 * the bootstrap program into the on-board processor, and starts it.
 *
 * The bootstrap program loads (via DMA) instructions and data for a new
 * program from host DRAM locations indicated by the host driver in the
 * BSM_DRAM_* registers.  Once the new program is loaded, it starts
 * automatically.
 *
 * When initializing the NIC, the host driver points the BSM to the
 * "initialize" uCode image.  This uCode sets up some internal data, then
 * notifies host via "initialize alive" that it is complete.
 *
 * The host then replaces the BSM_DRAM_* pointer values to point to the
 * normal runtime uCode instructions and a backup uCode data cache buffer
 * (filled initially with starting data values for the on-board processor),
 * then triggers the "initialize" uCode to load and launch the runtime uCode,
 * which begins normal operation.
 *
 * When doing a power-save shutdown, runtime uCode saves data SRAM into
 * the backup data cache in DRAM before SRAM is powered down.
 *
 * When powering back up, the BSM loads the bootstrap program.  This reloads
 * the runtime uCode instructions and the backup data cache into SRAM,
 * and re-launches the runtime uCode from where it left off.
 */
C
Christoph Hellwig 已提交
5283
static int iwl3945_load_bsm(struct iwl3945_priv *priv)
Z
Zhu Yi 已提交
5284 5285 5286 5287 5288 5289 5290 5291 5292 5293 5294 5295 5296 5297 5298 5299 5300 5301 5302
{
	__le32 *image = priv->ucode_boot.v_addr;
	u32 len = priv->ucode_boot.len;
	dma_addr_t pinst;
	dma_addr_t pdata;
	u32 inst_len;
	u32 data_len;
	int rc;
	int i;
	u32 done;
	u32 reg_offset;

	IWL_DEBUG_INFO("Begin load bsm\n");

	/* make sure bootstrap program is no larger than BSM's SRAM size */
	if (len > IWL_MAX_BSM_SIZE)
		return -EINVAL;

	/* Tell bootstrap uCode where to find the "Initialize" uCode
5303
	 *   in host DRAM ... host DRAM physical address bits 31:0 for 3945.
C
Christoph Hellwig 已提交
5304
	 * NOTE:  iwl3945_initialize_alive_start() will replace these values,
Z
Zhu Yi 已提交
5305 5306 5307 5308 5309 5310 5311
	 *        after the "initialize" uCode has run, to point to
	 *        runtime/protocol instructions and backup data cache. */
	pinst = priv->ucode_init.p_addr;
	pdata = priv->ucode_init_data.p_addr;
	inst_len = priv->ucode_init.len;
	data_len = priv->ucode_init_data.len;

C
Christoph Hellwig 已提交
5312
	rc = iwl3945_grab_nic_access(priv);
Z
Zhu Yi 已提交
5313 5314 5315
	if (rc)
		return rc;

C
Christoph Hellwig 已提交
5316 5317 5318 5319
	iwl3945_write_prph(priv, BSM_DRAM_INST_PTR_REG, pinst);
	iwl3945_write_prph(priv, BSM_DRAM_DATA_PTR_REG, pdata);
	iwl3945_write_prph(priv, BSM_DRAM_INST_BYTECOUNT_REG, inst_len);
	iwl3945_write_prph(priv, BSM_DRAM_DATA_BYTECOUNT_REG, data_len);
Z
Zhu Yi 已提交
5320 5321 5322 5323 5324

	/* Fill BSM memory with bootstrap instructions */
	for (reg_offset = BSM_SRAM_LOWER_BOUND;
	     reg_offset < BSM_SRAM_LOWER_BOUND + len;
	     reg_offset += sizeof(u32), image++)
C
Christoph Hellwig 已提交
5325
		_iwl3945_write_prph(priv, reg_offset,
Z
Zhu Yi 已提交
5326 5327
					  le32_to_cpu(*image));

C
Christoph Hellwig 已提交
5328
	rc = iwl3945_verify_bsm(priv);
Z
Zhu Yi 已提交
5329
	if (rc) {
C
Christoph Hellwig 已提交
5330
		iwl3945_release_nic_access(priv);
Z
Zhu Yi 已提交
5331 5332 5333 5334
		return rc;
	}

	/* Tell BSM to copy from BSM SRAM into instruction SRAM, when asked */
C
Christoph Hellwig 已提交
5335 5336
	iwl3945_write_prph(priv, BSM_WR_MEM_SRC_REG, 0x0);
	iwl3945_write_prph(priv, BSM_WR_MEM_DST_REG,
Z
Zhu Yi 已提交
5337
				 RTC_INST_LOWER_BOUND);
C
Christoph Hellwig 已提交
5338
	iwl3945_write_prph(priv, BSM_WR_DWCOUNT_REG, len / sizeof(u32));
Z
Zhu Yi 已提交
5339 5340 5341

	/* Load bootstrap code into instruction SRAM now,
	 *   to prepare to load "initialize" uCode */
C
Christoph Hellwig 已提交
5342
	iwl3945_write_prph(priv, BSM_WR_CTRL_REG,
Z
Zhu Yi 已提交
5343 5344 5345 5346
		BSM_WR_CTRL_REG_BIT_START);

	/* Wait for load of bootstrap uCode to finish */
	for (i = 0; i < 100; i++) {
C
Christoph Hellwig 已提交
5347
		done = iwl3945_read_prph(priv, BSM_WR_CTRL_REG);
Z
Zhu Yi 已提交
5348 5349 5350 5351 5352 5353 5354 5355 5356 5357 5358 5359 5360
		if (!(done & BSM_WR_CTRL_REG_BIT_START))
			break;
		udelay(10);
	}
	if (i < 100)
		IWL_DEBUG_INFO("BSM write complete, poll %d iterations\n", i);
	else {
		IWL_ERROR("BSM write did not complete!\n");
		return -EIO;
	}

	/* Enable future boot loads whenever power management unit triggers it
	 *   (e.g. when powering back up after power-save shutdown) */
C
Christoph Hellwig 已提交
5361
	iwl3945_write_prph(priv, BSM_WR_CTRL_REG,
Z
Zhu Yi 已提交
5362 5363
		BSM_WR_CTRL_REG_BIT_START_EN);

C
Christoph Hellwig 已提交
5364
	iwl3945_release_nic_access(priv);
Z
Zhu Yi 已提交
5365 5366 5367 5368

	return 0;
}

C
Christoph Hellwig 已提交
5369
static void iwl3945_nic_start(struct iwl3945_priv *priv)
Z
Zhu Yi 已提交
5370 5371
{
	/* Remove all resets to allow NIC to operate */
C
Christoph Hellwig 已提交
5372
	iwl3945_write32(priv, CSR_RESET, 0);
Z
Zhu Yi 已提交
5373 5374 5375
}

/**
C
Christoph Hellwig 已提交
5376
 * iwl3945_read_ucode - Read uCode images from disk file.
Z
Zhu Yi 已提交
5377 5378 5379
 *
 * Copy into buffers for card to fetch via bus-mastering
 */
C
Christoph Hellwig 已提交
5380
static int iwl3945_read_ucode(struct iwl3945_priv *priv)
Z
Zhu Yi 已提交
5381
{
C
Christoph Hellwig 已提交
5382
	struct iwl3945_ucode *ucode;
5383
	int ret = 0;
Z
Zhu Yi 已提交
5384 5385
	const struct firmware *ucode_raw;
	/* firmware file name contains uCode/driver compatibility version */
5386
	const char *name = priv->cfg->fw_name;
Z
Zhu Yi 已提交
5387 5388 5389 5390 5391 5392
	u8 *src;
	size_t len;
	u32 ver, inst_size, data_size, init_size, init_data_size, boot_size;

	/* Ask kernel firmware_class module to get the boot firmware off disk.
	 * request_firmware() is synchronous, file is in memory on return. */
5393 5394 5395 5396
	ret = request_firmware(&ucode_raw, name, &priv->pci_dev->dev);
	if (ret < 0) {
		IWL_ERROR("%s firmware file req failed: Reason %d\n",
				name, ret);
Z
Zhu Yi 已提交
5397 5398 5399 5400 5401 5402 5403 5404 5405
		goto error;
	}

	IWL_DEBUG_INFO("Got firmware '%s' file (%zd bytes) from disk\n",
		       name, ucode_raw->size);

	/* Make sure that we got at least our header! */
	if (ucode_raw->size < sizeof(*ucode)) {
		IWL_ERROR("File size way too small!\n");
5406
		ret = -EINVAL;
Z
Zhu Yi 已提交
5407 5408 5409 5410 5411 5412 5413 5414 5415 5416 5417 5418 5419 5420
		goto err_release;
	}

	/* Data from ucode file:  header followed by uCode images */
	ucode = (void *)ucode_raw->data;

	ver = le32_to_cpu(ucode->ver);
	inst_size = le32_to_cpu(ucode->inst_size);
	data_size = le32_to_cpu(ucode->data_size);
	init_size = le32_to_cpu(ucode->init_size);
	init_data_size = le32_to_cpu(ucode->init_data_size);
	boot_size = le32_to_cpu(ucode->boot_size);

	IWL_DEBUG_INFO("f/w package hdr ucode version = 0x%x\n", ver);
5421 5422 5423 5424 5425
	IWL_DEBUG_INFO("f/w package hdr runtime inst size = %u\n", inst_size);
	IWL_DEBUG_INFO("f/w package hdr runtime data size = %u\n", data_size);
	IWL_DEBUG_INFO("f/w package hdr init inst size = %u\n", init_size);
	IWL_DEBUG_INFO("f/w package hdr init data size = %u\n", init_data_size);
	IWL_DEBUG_INFO("f/w package hdr boot inst size = %u\n", boot_size);
Z
Zhu Yi 已提交
5426 5427 5428 5429 5430 5431 5432 5433

	/* Verify size of file vs. image size info in file's header */
	if (ucode_raw->size < sizeof(*ucode) +
		inst_size + data_size + init_size +
		init_data_size + boot_size) {

		IWL_DEBUG_INFO("uCode file size %d too small\n",
			       (int)ucode_raw->size);
5434
		ret = -EINVAL;
Z
Zhu Yi 已提交
5435 5436 5437 5438 5439
		goto err_release;
	}

	/* Verify that uCode images will fit in card's SRAM */
	if (inst_size > IWL_MAX_INST_SIZE) {
5440 5441 5442
		IWL_DEBUG_INFO("uCode instr len %d too large to fit in\n",
			       inst_size);
		ret = -EINVAL;
Z
Zhu Yi 已提交
5443 5444 5445 5446
		goto err_release;
	}

	if (data_size > IWL_MAX_DATA_SIZE) {
5447 5448 5449
		IWL_DEBUG_INFO("uCode data len %d too large to fit in\n",
			       data_size);
		ret = -EINVAL;
Z
Zhu Yi 已提交
5450 5451 5452
		goto err_release;
	}
	if (init_size > IWL_MAX_INST_SIZE) {
5453 5454 5455
		IWL_DEBUG_INFO("uCode init instr len %d too large to fit in\n",
				init_size);
		ret = -EINVAL;
Z
Zhu Yi 已提交
5456 5457 5458
		goto err_release;
	}
	if (init_data_size > IWL_MAX_DATA_SIZE) {
5459 5460 5461
		IWL_DEBUG_INFO("uCode init data len %d too large to fit in\n",
				init_data_size);
		ret = -EINVAL;
Z
Zhu Yi 已提交
5462 5463 5464
		goto err_release;
	}
	if (boot_size > IWL_MAX_BSM_SIZE) {
5465 5466 5467
		IWL_DEBUG_INFO("uCode boot instr len %d too large to fit in\n",
				boot_size);
		ret = -EINVAL;
Z
Zhu Yi 已提交
5468 5469 5470 5471 5472 5473 5474 5475 5476
		goto err_release;
	}

	/* Allocate ucode buffers for card's bus-master loading ... */

	/* Runtime instructions and 2 copies of data:
	 * 1) unmodified from disk
	 * 2) backup cache for save/restore during power-downs */
	priv->ucode_code.len = inst_size;
5477
	iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_code);
Z
Zhu Yi 已提交
5478 5479

	priv->ucode_data.len = data_size;
5480
	iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_data);
Z
Zhu Yi 已提交
5481 5482

	priv->ucode_data_backup.len = data_size;
5483
	iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_data_backup);
Z
Zhu Yi 已提交
5484

5485 5486 5487
	if (!priv->ucode_code.v_addr || !priv->ucode_data.v_addr ||
	    !priv->ucode_data_backup.v_addr)
		goto err_pci_alloc;
Z
Zhu Yi 已提交
5488 5489

	/* Initialization instructions and data */
5490 5491
	if (init_size && init_data_size) {
		priv->ucode_init.len = init_size;
5492
		iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_init);
5493 5494

		priv->ucode_init_data.len = init_data_size;
5495
		iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_init_data);
5496 5497 5498 5499

		if (!priv->ucode_init.v_addr || !priv->ucode_init_data.v_addr)
			goto err_pci_alloc;
	}
Z
Zhu Yi 已提交
5500 5501

	/* Bootstrap (instructions only, no data) */
5502 5503
	if (boot_size) {
		priv->ucode_boot.len = boot_size;
5504
		iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_boot);
Z
Zhu Yi 已提交
5505

5506 5507 5508
		if (!priv->ucode_boot.v_addr)
			goto err_pci_alloc;
	}
Z
Zhu Yi 已提交
5509 5510 5511 5512 5513 5514

	/* Copy images into buffers for card's bus-master reads ... */

	/* Runtime instructions (first block of data in file) */
	src = &ucode->data[0];
	len = priv->ucode_code.len;
5515
	IWL_DEBUG_INFO("Copying (but not loading) uCode instr len %Zd\n", len);
Z
Zhu Yi 已提交
5516 5517 5518 5519 5520
	memcpy(priv->ucode_code.v_addr, src, len);
	IWL_DEBUG_INFO("uCode instr buf vaddr = 0x%p, paddr = 0x%08x\n",
		priv->ucode_code.v_addr, (u32)priv->ucode_code.p_addr);

	/* Runtime data (2nd block)
C
Christoph Hellwig 已提交
5521
	 * NOTE:  Copy into backup buffer will be done in iwl3945_up()  */
Z
Zhu Yi 已提交
5522 5523
	src = &ucode->data[inst_size];
	len = priv->ucode_data.len;
5524
	IWL_DEBUG_INFO("Copying (but not loading) uCode data len %Zd\n", len);
Z
Zhu Yi 已提交
5525 5526 5527 5528 5529 5530 5531
	memcpy(priv->ucode_data.v_addr, src, len);
	memcpy(priv->ucode_data_backup.v_addr, src, len);

	/* Initialization instructions (3rd block) */
	if (init_size) {
		src = &ucode->data[inst_size + data_size];
		len = priv->ucode_init.len;
5532 5533
		IWL_DEBUG_INFO("Copying (but not loading) init instr len %Zd\n",
			       len);
Z
Zhu Yi 已提交
5534 5535 5536 5537 5538 5539 5540 5541 5542 5543 5544 5545 5546 5547 5548 5549 5550 5551 5552 5553 5554 5555 5556 5557 5558
		memcpy(priv->ucode_init.v_addr, src, len);
	}

	/* Initialization data (4th block) */
	if (init_data_size) {
		src = &ucode->data[inst_size + data_size + init_size];
		len = priv->ucode_init_data.len;
		IWL_DEBUG_INFO("Copying (but not loading) init data len %d\n",
			       (int)len);
		memcpy(priv->ucode_init_data.v_addr, src, len);
	}

	/* Bootstrap instructions (5th block) */
	src = &ucode->data[inst_size + data_size + init_size + init_data_size];
	len = priv->ucode_boot.len;
	IWL_DEBUG_INFO("Copying (but not loading) boot instr len %d\n",
		       (int)len);
	memcpy(priv->ucode_boot.v_addr, src, len);

	/* We have our copies now, allow OS release its copies */
	release_firmware(ucode_raw);
	return 0;

 err_pci_alloc:
	IWL_ERROR("failed to allocate pci memory\n");
5559
	ret = -ENOMEM;
C
Christoph Hellwig 已提交
5560
	iwl3945_dealloc_ucode_pci(priv);
Z
Zhu Yi 已提交
5561 5562 5563 5564 5565

 err_release:
	release_firmware(ucode_raw);

 error:
5566
	return ret;
Z
Zhu Yi 已提交
5567 5568 5569 5570
}


/**
C
Christoph Hellwig 已提交
5571
 * iwl3945_set_ucode_ptrs - Set uCode address location
Z
Zhu Yi 已提交
5572 5573 5574 5575 5576 5577 5578
 *
 * Tell initialization uCode where to find runtime uCode.
 *
 * BSM registers initially contain pointers to initialization uCode.
 * We need to replace them to load runtime uCode inst and data,
 * and to save runtime data when powering down.
 */
C
Christoph Hellwig 已提交
5579
static int iwl3945_set_ucode_ptrs(struct iwl3945_priv *priv)
Z
Zhu Yi 已提交
5580 5581 5582 5583 5584 5585 5586 5587 5588 5589 5590
{
	dma_addr_t pinst;
	dma_addr_t pdata;
	int rc = 0;
	unsigned long flags;

	/* bits 31:0 for 3945 */
	pinst = priv->ucode_code.p_addr;
	pdata = priv->ucode_data_backup.p_addr;

	spin_lock_irqsave(&priv->lock, flags);
C
Christoph Hellwig 已提交
5591
	rc = iwl3945_grab_nic_access(priv);
Z
Zhu Yi 已提交
5592 5593 5594 5595 5596 5597
	if (rc) {
		spin_unlock_irqrestore(&priv->lock, flags);
		return rc;
	}

	/* Tell bootstrap uCode where to find image to load */
C
Christoph Hellwig 已提交
5598 5599 5600
	iwl3945_write_prph(priv, BSM_DRAM_INST_PTR_REG, pinst);
	iwl3945_write_prph(priv, BSM_DRAM_DATA_PTR_REG, pdata);
	iwl3945_write_prph(priv, BSM_DRAM_DATA_BYTECOUNT_REG,
Z
Zhu Yi 已提交
5601 5602 5603 5604
				 priv->ucode_data.len);

	/* Inst bytecount must be last to set up, bit 31 signals uCode
	 *   that all new ptr/size info is in place */
C
Christoph Hellwig 已提交
5605
	iwl3945_write_prph(priv, BSM_DRAM_INST_BYTECOUNT_REG,
Z
Zhu Yi 已提交
5606 5607
				 priv->ucode_code.len | BSM_DRAM_INST_LOAD);

C
Christoph Hellwig 已提交
5608
	iwl3945_release_nic_access(priv);
Z
Zhu Yi 已提交
5609 5610 5611 5612 5613 5614 5615 5616 5617

	spin_unlock_irqrestore(&priv->lock, flags);

	IWL_DEBUG_INFO("Runtime uCode pointers are set.\n");

	return rc;
}

/**
C
Christoph Hellwig 已提交
5618
 * iwl3945_init_alive_start - Called after REPLY_ALIVE notification received
Z
Zhu Yi 已提交
5619 5620 5621 5622
 *
 * Called after REPLY_ALIVE notification received from "initialize" uCode.
 *
 * Tell "initialize" uCode to go ahead and load the runtime uCode.
5623
 */
C
Christoph Hellwig 已提交
5624
static void iwl3945_init_alive_start(struct iwl3945_priv *priv)
Z
Zhu Yi 已提交
5625 5626 5627 5628 5629 5630 5631 5632 5633 5634 5635 5636
{
	/* Check alive response for "valid" sign from uCode */
	if (priv->card_alive_init.is_valid != UCODE_VALID_OK) {
		/* We had an error bringing up the hardware, so take it
		 * all the way back down so we can try again */
		IWL_DEBUG_INFO("Initialize Alive failed.\n");
		goto restart;
	}

	/* Bootstrap uCode has loaded initialize uCode ... verify inst image.
	 * This is a paranoid check, because we would not have gotten the
	 * "initialize" alive if code weren't properly loaded.  */
C
Christoph Hellwig 已提交
5637
	if (iwl3945_verify_ucode(priv)) {
Z
Zhu Yi 已提交
5638 5639 5640 5641 5642 5643 5644 5645 5646 5647
		/* Runtime instruction load was bad;
		 * take it all the way back down so we can try again */
		IWL_DEBUG_INFO("Bad \"initialize\" uCode load.\n");
		goto restart;
	}

	/* Send pointers to protocol/runtime uCode image ... init code will
	 * load and launch runtime uCode, which will send us another "Alive"
	 * notification. */
	IWL_DEBUG_INFO("Initialization Alive received.\n");
C
Christoph Hellwig 已提交
5648
	if (iwl3945_set_ucode_ptrs(priv)) {
Z
Zhu Yi 已提交
5649 5650 5651 5652 5653 5654 5655 5656 5657 5658 5659 5660 5661
		/* Runtime instruction load won't happen;
		 * take it all the way back down so we can try again */
		IWL_DEBUG_INFO("Couldn't set up uCode pointers.\n");
		goto restart;
	}
	return;

 restart:
	queue_work(priv->workqueue, &priv->restart);
}


/**
C
Christoph Hellwig 已提交
5662
 * iwl3945_alive_start - called after REPLY_ALIVE notification received
Z
Zhu Yi 已提交
5663
 *                   from protocol/runtime uCode (initialization uCode's
C
Christoph Hellwig 已提交
5664
 *                   Alive gets handled by iwl3945_init_alive_start()).
Z
Zhu Yi 已提交
5665
 */
C
Christoph Hellwig 已提交
5666
static void iwl3945_alive_start(struct iwl3945_priv *priv)
Z
Zhu Yi 已提交
5667 5668 5669 5670 5671 5672 5673 5674 5675 5676 5677 5678 5679 5680 5681 5682 5683
{
	int rc = 0;
	int thermal_spin = 0;
	u32 rfkill;

	IWL_DEBUG_INFO("Runtime Alive received.\n");

	if (priv->card_alive.is_valid != UCODE_VALID_OK) {
		/* We had an error bringing up the hardware, so take it
		 * all the way back down so we can try again */
		IWL_DEBUG_INFO("Alive failed.\n");
		goto restart;
	}

	/* Initialize uCode has loaded Runtime uCode ... verify inst image.
	 * This is a paranoid check, because we would not have gotten the
	 * "runtime" alive if code weren't properly loaded.  */
C
Christoph Hellwig 已提交
5684
	if (iwl3945_verify_ucode(priv)) {
Z
Zhu Yi 已提交
5685 5686 5687 5688 5689 5690
		/* Runtime instruction load was bad;
		 * take it all the way back down so we can try again */
		IWL_DEBUG_INFO("Bad runtime uCode load.\n");
		goto restart;
	}

C
Christoph Hellwig 已提交
5691
	iwl3945_clear_stations_table(priv);
Z
Zhu Yi 已提交
5692

C
Christoph Hellwig 已提交
5693
	rc = iwl3945_grab_nic_access(priv);
Z
Zhu Yi 已提交
5694 5695 5696 5697 5698
	if (rc) {
		IWL_WARNING("Can not read rfkill status from adapter\n");
		return;
	}

C
Christoph Hellwig 已提交
5699
	rfkill = iwl3945_read_prph(priv, APMG_RFKILL_REG);
Z
Zhu Yi 已提交
5700
	IWL_DEBUG_INFO("RFKILL status: 0x%x\n", rfkill);
C
Christoph Hellwig 已提交
5701
	iwl3945_release_nic_access(priv);
Z
Zhu Yi 已提交
5702 5703 5704 5705 5706

	if (rfkill & 0x1) {
		clear_bit(STATUS_RF_KILL_HW, &priv->status);
		/* if rfkill is not on, then wait for thermal
		 * sensor in adapter to kick in */
C
Christoph Hellwig 已提交
5707
		while (iwl3945_hw_get_temperature(priv) == 0) {
Z
Zhu Yi 已提交
5708 5709 5710 5711 5712 5713 5714 5715 5716 5717
			thermal_spin++;
			udelay(10);
		}

		if (thermal_spin)
			IWL_DEBUG_INFO("Thermal calibration took %dus\n",
				       thermal_spin * 10);
	} else
		set_bit(STATUS_RF_KILL_HW, &priv->status);

5718
	/* After the ALIVE response, we can send commands to 3945 uCode */
Z
Zhu Yi 已提交
5719 5720 5721 5722 5723
	set_bit(STATUS_ALIVE, &priv->status);

	/* Clear out the uCode error bit if it is set */
	clear_bit(STATUS_FW_ERROR, &priv->status);

C
Christoph Hellwig 已提交
5724
	if (iwl3945_is_rfkill(priv))
Z
Zhu Yi 已提交
5725 5726
		return;

5727
	ieee80211_wake_queues(priv->hw);
Z
Zhu Yi 已提交
5728 5729 5730 5731

	priv->active_rate = priv->rates_mask;
	priv->active_rate_basic = priv->rates_mask & IWL_BASIC_RATES_MASK;

C
Christoph Hellwig 已提交
5732
	iwl3945_send_power_mode(priv, IWL_POWER_LEVEL(priv->power_mode));
Z
Zhu Yi 已提交
5733

C
Christoph Hellwig 已提交
5734 5735 5736
	if (iwl3945_is_associated(priv)) {
		struct iwl3945_rxon_cmd *active_rxon =
				(struct iwl3945_rxon_cmd *)(&priv->active_rxon);
Z
Zhu Yi 已提交
5737 5738 5739 5740 5741 5742

		memcpy(&priv->staging_rxon, &priv->active_rxon,
		       sizeof(priv->staging_rxon));
		active_rxon->filter_flags &= ~RXON_FILTER_ASSOC_MSK;
	} else {
		/* Initialize our rx_config data */
C
Christoph Hellwig 已提交
5743
		iwl3945_connection_init_rx_config(priv);
Z
Zhu Yi 已提交
5744 5745 5746
		memcpy(priv->staging_rxon.node_addr, priv->mac_addr, ETH_ALEN);
	}

5747
	/* Configure Bluetooth device coexistence support */
C
Christoph Hellwig 已提交
5748
	iwl3945_send_bt_config(priv);
Z
Zhu Yi 已提交
5749 5750

	/* Configure the adapter for unassociated operation */
C
Christoph Hellwig 已提交
5751
	iwl3945_commit_rxon(priv);
Z
Zhu Yi 已提交
5752 5753 5754

	iwl3945_reg_txpower_periodic(priv);

5755 5756
	iwl3945_led_register(priv);

Z
Zhu Yi 已提交
5757
	IWL_DEBUG_INFO("ALIVE processing complete.\n");
5758
	set_bit(STATUS_READY, &priv->status);
5759
	wake_up_interruptible(&priv->wait_command_queue);
Z
Zhu Yi 已提交
5760 5761

	if (priv->error_recovering)
C
Christoph Hellwig 已提交
5762
		iwl3945_error_recovery(priv);
Z
Zhu Yi 已提交
5763

5764
	ieee80211_notify_mac(priv->hw, IEEE80211_NOTIFY_RE_ASSOC);
Z
Zhu Yi 已提交
5765 5766 5767 5768 5769 5770
	return;

 restart:
	queue_work(priv->workqueue, &priv->restart);
}

C
Christoph Hellwig 已提交
5771
static void iwl3945_cancel_deferred_work(struct iwl3945_priv *priv);
Z
Zhu Yi 已提交
5772

C
Christoph Hellwig 已提交
5773
static void __iwl3945_down(struct iwl3945_priv *priv)
Z
Zhu Yi 已提交
5774 5775 5776 5777 5778 5779 5780 5781 5782 5783 5784 5785
{
	unsigned long flags;
	int exit_pending = test_bit(STATUS_EXIT_PENDING, &priv->status);
	struct ieee80211_conf *conf = NULL;

	IWL_DEBUG_INFO(DRV_NAME " is going down\n");

	conf = ieee80211_get_hw_conf(priv->hw);

	if (!exit_pending)
		set_bit(STATUS_EXIT_PENDING, &priv->status);

M
Mohamed Abbas 已提交
5786
	iwl3945_led_unregister(priv);
C
Christoph Hellwig 已提交
5787
	iwl3945_clear_stations_table(priv);
Z
Zhu Yi 已提交
5788 5789 5790 5791 5792 5793 5794 5795 5796 5797

	/* Unblock any waiting calls */
	wake_up_interruptible_all(&priv->wait_command_queue);

	/* Wipe out the EXIT_PENDING status bit if we are not actually
	 * exiting the module */
	if (!exit_pending)
		clear_bit(STATUS_EXIT_PENDING, &priv->status);

	/* stop and reset the on-board processor */
C
Christoph Hellwig 已提交
5798
	iwl3945_write32(priv, CSR_RESET, CSR_RESET_REG_FLAG_NEVO_RESET);
Z
Zhu Yi 已提交
5799 5800

	/* tell the device to stop sending interrupts */
5801
	spin_lock_irqsave(&priv->lock, flags);
C
Christoph Hellwig 已提交
5802
	iwl3945_disable_interrupts(priv);
5803 5804
	spin_unlock_irqrestore(&priv->lock, flags);
	iwl_synchronize_irq(priv);
Z
Zhu Yi 已提交
5805 5806 5807 5808

	if (priv->mac80211_registered)
		ieee80211_stop_queues(priv->hw);

C
Christoph Hellwig 已提交
5809
	/* If we have not previously called iwl3945_init() then
Z
Zhu Yi 已提交
5810
	 * clear all bits but the RF Kill and SUSPEND bits and return */
C
Christoph Hellwig 已提交
5811
	if (!iwl3945_is_init(priv)) {
Z
Zhu Yi 已提交
5812 5813 5814 5815
		priv->status = test_bit(STATUS_RF_KILL_HW, &priv->status) <<
					STATUS_RF_KILL_HW |
			       test_bit(STATUS_RF_KILL_SW, &priv->status) <<
					STATUS_RF_KILL_SW |
5816 5817
			       test_bit(STATUS_GEO_CONFIGURED, &priv->status) <<
					STATUS_GEO_CONFIGURED |
Z
Zhu Yi 已提交
5818
			       test_bit(STATUS_IN_SUSPEND, &priv->status) <<
5819 5820 5821
					STATUS_IN_SUSPEND |
				test_bit(STATUS_EXIT_PENDING, &priv->status) <<
					STATUS_EXIT_PENDING;
Z
Zhu Yi 已提交
5822 5823 5824 5825 5826 5827 5828 5829 5830
		goto exit;
	}

	/* ...otherwise clear out all the status bits but the RF Kill and
	 * SUSPEND bits and continue taking the NIC down. */
	priv->status &= test_bit(STATUS_RF_KILL_HW, &priv->status) <<
				STATUS_RF_KILL_HW |
			test_bit(STATUS_RF_KILL_SW, &priv->status) <<
				STATUS_RF_KILL_SW |
5831 5832
			test_bit(STATUS_GEO_CONFIGURED, &priv->status) <<
				STATUS_GEO_CONFIGURED |
Z
Zhu Yi 已提交
5833 5834 5835
			test_bit(STATUS_IN_SUSPEND, &priv->status) <<
				STATUS_IN_SUSPEND |
			test_bit(STATUS_FW_ERROR, &priv->status) <<
5836 5837 5838
				STATUS_FW_ERROR |
			test_bit(STATUS_EXIT_PENDING, &priv->status) <<
				STATUS_EXIT_PENDING;
Z
Zhu Yi 已提交
5839 5840

	spin_lock_irqsave(&priv->lock, flags);
C
Christoph Hellwig 已提交
5841
	iwl3945_clear_bit(priv, CSR_GP_CNTRL, CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ);
Z
Zhu Yi 已提交
5842 5843
	spin_unlock_irqrestore(&priv->lock, flags);

C
Christoph Hellwig 已提交
5844 5845
	iwl3945_hw_txq_ctx_stop(priv);
	iwl3945_hw_rxq_stop(priv);
Z
Zhu Yi 已提交
5846 5847

	spin_lock_irqsave(&priv->lock, flags);
C
Christoph Hellwig 已提交
5848 5849
	if (!iwl3945_grab_nic_access(priv)) {
		iwl3945_write_prph(priv, APMG_CLK_DIS_REG,
Z
Zhu Yi 已提交
5850
					 APMG_CLK_VAL_DMA_CLK_RQT);
C
Christoph Hellwig 已提交
5851
		iwl3945_release_nic_access(priv);
Z
Zhu Yi 已提交
5852 5853 5854 5855 5856
	}
	spin_unlock_irqrestore(&priv->lock, flags);

	udelay(5);

C
Christoph Hellwig 已提交
5857 5858 5859
	iwl3945_hw_nic_stop_master(priv);
	iwl3945_set_bit(priv, CSR_RESET, CSR_RESET_REG_FLAG_SW_RESET);
	iwl3945_hw_nic_reset(priv);
Z
Zhu Yi 已提交
5860 5861

 exit:
C
Christoph Hellwig 已提交
5862
	memset(&priv->card_alive, 0, sizeof(struct iwl3945_alive_resp));
Z
Zhu Yi 已提交
5863 5864 5865 5866 5867 5868

	if (priv->ibss_beacon)
		dev_kfree_skb(priv->ibss_beacon);
	priv->ibss_beacon = NULL;

	/* clear out any free frames */
C
Christoph Hellwig 已提交
5869
	iwl3945_clear_free_frames(priv);
Z
Zhu Yi 已提交
5870 5871
}

C
Christoph Hellwig 已提交
5872
static void iwl3945_down(struct iwl3945_priv *priv)
Z
Zhu Yi 已提交
5873 5874
{
	mutex_lock(&priv->mutex);
C
Christoph Hellwig 已提交
5875
	__iwl3945_down(priv);
Z
Zhu Yi 已提交
5876
	mutex_unlock(&priv->mutex);
5877

C
Christoph Hellwig 已提交
5878
	iwl3945_cancel_deferred_work(priv);
Z
Zhu Yi 已提交
5879 5880 5881 5882
}

#define MAX_HW_RESTARTS 5

C
Christoph Hellwig 已提交
5883
static int __iwl3945_up(struct iwl3945_priv *priv)
Z
Zhu Yi 已提交
5884 5885 5886 5887 5888 5889 5890 5891 5892 5893 5894
{
	int rc, i;

	if (test_bit(STATUS_EXIT_PENDING, &priv->status)) {
		IWL_WARNING("Exit pending; will not bring the NIC up\n");
		return -EIO;
	}

	if (test_bit(STATUS_RF_KILL_SW, &priv->status)) {
		IWL_WARNING("Radio disabled by SW RF kill (module "
			    "parameter)\n");
5895 5896 5897
		return -ENODEV;
	}

5898 5899 5900 5901 5902
	if (!priv->ucode_data_backup.v_addr || !priv->ucode_data.v_addr) {
		IWL_ERROR("ucode not available for device bringup\n");
		return -EIO;
	}

5903 5904 5905 5906 5907 5908 5909 5910 5911 5912
	/* If platform's RF_KILL switch is NOT set to KILL */
	if (iwl3945_read32(priv, CSR_GP_CNTRL) &
				CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW)
		clear_bit(STATUS_RF_KILL_HW, &priv->status);
	else {
		set_bit(STATUS_RF_KILL_HW, &priv->status);
		if (!test_bit(STATUS_IN_SUSPEND, &priv->status)) {
			IWL_WARNING("Radio disabled by HW RF Kill switch\n");
			return -ENODEV;
		}
Z
Zhu Yi 已提交
5913
	}
5914

C
Christoph Hellwig 已提交
5915
	iwl3945_write32(priv, CSR_INT, 0xFFFFFFFF);
Z
Zhu Yi 已提交
5916

C
Christoph Hellwig 已提交
5917
	rc = iwl3945_hw_nic_init(priv);
Z
Zhu Yi 已提交
5918 5919 5920 5921 5922 5923
	if (rc) {
		IWL_ERROR("Unable to int nic\n");
		return rc;
	}

	/* make sure rfkill handshake bits are cleared */
C
Christoph Hellwig 已提交
5924 5925
	iwl3945_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
	iwl3945_write32(priv, CSR_UCODE_DRV_GP1_CLR,
Z
Zhu Yi 已提交
5926 5927 5928
		    CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED);

	/* clear (again), then enable host interrupts */
C
Christoph Hellwig 已提交
5929 5930
	iwl3945_write32(priv, CSR_INT, 0xFFFFFFFF);
	iwl3945_enable_interrupts(priv);
Z
Zhu Yi 已提交
5931 5932

	/* really make sure rfkill handshake bits are cleared */
C
Christoph Hellwig 已提交
5933 5934
	iwl3945_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
	iwl3945_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
Z
Zhu Yi 已提交
5935 5936 5937 5938 5939

	/* Copy original ucode data image from disk into backup cache.
	 * This will be used to initialize the on-board processor's
	 * data SRAM for a clean start when the runtime program first loads. */
	memcpy(priv->ucode_data_backup.v_addr, priv->ucode_data.v_addr,
5940
	       priv->ucode_data.len);
Z
Zhu Yi 已提交
5941

5942 5943 5944 5945
	/* We return success when we resume from suspend and rf_kill is on. */
	if (test_bit(STATUS_RF_KILL_HW, &priv->status))
		return 0;

Z
Zhu Yi 已提交
5946 5947
	for (i = 0; i < MAX_HW_RESTARTS; i++) {

C
Christoph Hellwig 已提交
5948
		iwl3945_clear_stations_table(priv);
Z
Zhu Yi 已提交
5949 5950 5951 5952

		/* load bootstrap state machine,
		 * load bootstrap program into processor's memory,
		 * prepare to load the "initialize" uCode */
C
Christoph Hellwig 已提交
5953
		rc = iwl3945_load_bsm(priv);
Z
Zhu Yi 已提交
5954 5955 5956 5957 5958 5959 5960

		if (rc) {
			IWL_ERROR("Unable to set up bootstrap uCode: %d\n", rc);
			continue;
		}

		/* start card; "initialize" will load runtime ucode */
C
Christoph Hellwig 已提交
5961
		iwl3945_nic_start(priv);
Z
Zhu Yi 已提交
5962 5963 5964 5965 5966 5967 5968

		IWL_DEBUG_INFO(DRV_NAME " is coming up\n");

		return 0;
	}

	set_bit(STATUS_EXIT_PENDING, &priv->status);
C
Christoph Hellwig 已提交
5969
	__iwl3945_down(priv);
5970
	clear_bit(STATUS_EXIT_PENDING, &priv->status);
Z
Zhu Yi 已提交
5971 5972 5973 5974 5975 5976 5977 5978 5979 5980 5981 5982 5983 5984

	/* tried to restart and config the device for as long as our
	 * patience could withstand */
	IWL_ERROR("Unable to initialize device after %d attempts.\n", i);
	return -EIO;
}


/*****************************************************************************
 *
 * Workqueue callbacks
 *
 *****************************************************************************/

C
Christoph Hellwig 已提交
5985
static void iwl3945_bg_init_alive_start(struct work_struct *data)
Z
Zhu Yi 已提交
5986
{
C
Christoph Hellwig 已提交
5987 5988
	struct iwl3945_priv *priv =
	    container_of(data, struct iwl3945_priv, init_alive_start.work);
Z
Zhu Yi 已提交
5989 5990 5991 5992 5993

	if (test_bit(STATUS_EXIT_PENDING, &priv->status))
		return;

	mutex_lock(&priv->mutex);
C
Christoph Hellwig 已提交
5994
	iwl3945_init_alive_start(priv);
Z
Zhu Yi 已提交
5995 5996 5997
	mutex_unlock(&priv->mutex);
}

C
Christoph Hellwig 已提交
5998
static void iwl3945_bg_alive_start(struct work_struct *data)
Z
Zhu Yi 已提交
5999
{
C
Christoph Hellwig 已提交
6000 6001
	struct iwl3945_priv *priv =
	    container_of(data, struct iwl3945_priv, alive_start.work);
Z
Zhu Yi 已提交
6002 6003 6004 6005 6006

	if (test_bit(STATUS_EXIT_PENDING, &priv->status))
		return;

	mutex_lock(&priv->mutex);
C
Christoph Hellwig 已提交
6007
	iwl3945_alive_start(priv);
Z
Zhu Yi 已提交
6008 6009 6010
	mutex_unlock(&priv->mutex);
}

C
Christoph Hellwig 已提交
6011
static void iwl3945_bg_rf_kill(struct work_struct *work)
Z
Zhu Yi 已提交
6012
{
C
Christoph Hellwig 已提交
6013
	struct iwl3945_priv *priv = container_of(work, struct iwl3945_priv, rf_kill);
Z
Zhu Yi 已提交
6014 6015 6016 6017 6018 6019 6020 6021

	wake_up_interruptible(&priv->wait_command_queue);

	if (test_bit(STATUS_EXIT_PENDING, &priv->status))
		return;

	mutex_lock(&priv->mutex);

C
Christoph Hellwig 已提交
6022
	if (!iwl3945_is_rfkill(priv)) {
Z
Zhu Yi 已提交
6023 6024 6025 6026 6027 6028 6029 6030 6031 6032 6033 6034 6035 6036 6037
		IWL_DEBUG(IWL_DL_INFO | IWL_DL_RF_KILL,
			  "HW and/or SW RF Kill no longer active, restarting "
			  "device\n");
		if (!test_bit(STATUS_EXIT_PENDING, &priv->status))
			queue_work(priv->workqueue, &priv->restart);
	} else {

		if (!test_bit(STATUS_RF_KILL_HW, &priv->status))
			IWL_DEBUG_RF_KILL("Can not turn radio back on - "
					  "disabled by SW switch\n");
		else
			IWL_WARNING("Radio Frequency Kill Switch is On:\n"
				    "Kill switch must be turned off for "
				    "wireless networking to work.\n");
	}
6038

Z
Zhu Yi 已提交
6039
	mutex_unlock(&priv->mutex);
6040
	iwl3945_rfkill_set_hw_state(priv);
Z
Zhu Yi 已提交
6041 6042
}

6043 6044 6045 6046 6047 6048 6049 6050 6051 6052 6053 6054 6055 6056 6057 6058 6059 6060
static void iwl3945_bg_set_monitor(struct work_struct *work)
{
	struct iwl3945_priv *priv = container_of(work,
				struct iwl3945_priv, set_monitor);

	IWL_DEBUG(IWL_DL_STATE, "setting monitor mode\n");

	mutex_lock(&priv->mutex);

	if (!iwl3945_is_ready(priv))
		IWL_DEBUG(IWL_DL_STATE, "leave - not ready\n");
	else
		if (iwl3945_set_mode(priv, IEEE80211_IF_TYPE_MNTR) != 0)
			IWL_ERROR("iwl3945_set_mode() failed\n");

	mutex_unlock(&priv->mutex);
}

Z
Zhu Yi 已提交
6061 6062
#define IWL_SCAN_CHECK_WATCHDOG (7 * HZ)

C
Christoph Hellwig 已提交
6063
static void iwl3945_bg_scan_check(struct work_struct *data)
Z
Zhu Yi 已提交
6064
{
C
Christoph Hellwig 已提交
6065 6066
	struct iwl3945_priv *priv =
	    container_of(data, struct iwl3945_priv, scan_check.work);
Z
Zhu Yi 已提交
6067 6068 6069 6070 6071 6072 6073 6074 6075 6076

	if (test_bit(STATUS_EXIT_PENDING, &priv->status))
		return;

	mutex_lock(&priv->mutex);
	if (test_bit(STATUS_SCANNING, &priv->status) ||
	    test_bit(STATUS_SCAN_ABORTING, &priv->status)) {
		IWL_DEBUG(IWL_DL_INFO | IWL_DL_SCAN,
			  "Scan completion watchdog resetting adapter (%dms)\n",
			  jiffies_to_msecs(IWL_SCAN_CHECK_WATCHDOG));
6077

Z
Zhu Yi 已提交
6078
		if (!test_bit(STATUS_EXIT_PENDING, &priv->status))
C
Christoph Hellwig 已提交
6079
			iwl3945_send_scan_abort(priv);
Z
Zhu Yi 已提交
6080 6081 6082 6083
	}
	mutex_unlock(&priv->mutex);
}

C
Christoph Hellwig 已提交
6084
static void iwl3945_bg_request_scan(struct work_struct *data)
Z
Zhu Yi 已提交
6085
{
C
Christoph Hellwig 已提交
6086 6087 6088
	struct iwl3945_priv *priv =
	    container_of(data, struct iwl3945_priv, request_scan);
	struct iwl3945_host_cmd cmd = {
Z
Zhu Yi 已提交
6089
		.id = REPLY_SCAN_CMD,
C
Christoph Hellwig 已提交
6090
		.len = sizeof(struct iwl3945_scan_cmd),
Z
Zhu Yi 已提交
6091 6092 6093
		.meta.flags = CMD_SIZE_HUGE,
	};
	int rc = 0;
C
Christoph Hellwig 已提交
6094
	struct iwl3945_scan_cmd *scan;
Z
Zhu Yi 已提交
6095 6096
	struct ieee80211_conf *conf = NULL;
	u8 direct_mask;
6097
	enum ieee80211_band band;
Z
Zhu Yi 已提交
6098 6099 6100 6101 6102

	conf = ieee80211_get_hw_conf(priv->hw);

	mutex_lock(&priv->mutex);

C
Christoph Hellwig 已提交
6103
	if (!iwl3945_is_ready(priv)) {
Z
Zhu Yi 已提交
6104 6105 6106 6107 6108 6109 6110 6111 6112 6113 6114 6115 6116 6117 6118 6119 6120 6121 6122 6123 6124 6125 6126 6127 6128 6129 6130 6131
		IWL_WARNING("request scan called when driver not ready.\n");
		goto done;
	}

	/* Make sure the scan wasn't cancelled before this queued work
	 * was given the chance to run... */
	if (!test_bit(STATUS_SCANNING, &priv->status))
		goto done;

	/* This should never be called or scheduled if there is currently
	 * a scan active in the hardware. */
	if (test_bit(STATUS_SCAN_HW, &priv->status)) {
		IWL_DEBUG_INFO("Multiple concurrent scan requests in parallel. "
			       "Ignoring second request.\n");
		rc = -EIO;
		goto done;
	}

	if (test_bit(STATUS_EXIT_PENDING, &priv->status)) {
		IWL_DEBUG_SCAN("Aborting scan due to device shutdown\n");
		goto done;
	}

	if (test_bit(STATUS_SCAN_ABORTING, &priv->status)) {
		IWL_DEBUG_HC("Scan request while abort pending.  Queuing.\n");
		goto done;
	}

C
Christoph Hellwig 已提交
6132
	if (iwl3945_is_rfkill(priv)) {
Z
Zhu Yi 已提交
6133 6134 6135 6136 6137 6138 6139 6140 6141 6142 6143 6144 6145 6146 6147
		IWL_DEBUG_HC("Aborting scan due to RF Kill activation\n");
		goto done;
	}

	if (!test_bit(STATUS_READY, &priv->status)) {
		IWL_DEBUG_HC("Scan request while uninitialized.  Queuing.\n");
		goto done;
	}

	if (!priv->scan_bands) {
		IWL_DEBUG_HC("Aborting scan due to no requested bands\n");
		goto done;
	}

	if (!priv->scan) {
C
Christoph Hellwig 已提交
6148
		priv->scan = kmalloc(sizeof(struct iwl3945_scan_cmd) +
Z
Zhu Yi 已提交
6149 6150 6151 6152 6153 6154 6155
				     IWL_MAX_SCAN_SIZE, GFP_KERNEL);
		if (!priv->scan) {
			rc = -ENOMEM;
			goto done;
		}
	}
	scan = priv->scan;
C
Christoph Hellwig 已提交
6156
	memset(scan, 0, sizeof(struct iwl3945_scan_cmd) + IWL_MAX_SCAN_SIZE);
Z
Zhu Yi 已提交
6157 6158 6159 6160

	scan->quiet_plcp_th = IWL_PLCP_QUIET_THRESH;
	scan->quiet_time = IWL_ACTIVE_QUIET_TIME;

C
Christoph Hellwig 已提交
6161
	if (iwl3945_is_associated(priv)) {
Z
Zhu Yi 已提交
6162 6163 6164 6165 6166 6167 6168 6169 6170 6171 6172 6173 6174
		u16 interval = 0;
		u32 extra;
		u32 suspend_time = 100;
		u32 scan_suspend_time = 100;
		unsigned long flags;

		IWL_DEBUG_INFO("Scanning while associated...\n");

		spin_lock_irqsave(&priv->lock, flags);
		interval = priv->beacon_int;
		spin_unlock_irqrestore(&priv->lock, flags);

		scan->suspend_time = 0;
6175
		scan->max_out_time = cpu_to_le32(200 * 1024);
Z
Zhu Yi 已提交
6176 6177 6178 6179 6180 6181 6182 6183 6184 6185 6186 6187 6188 6189 6190 6191 6192 6193 6194 6195 6196 6197
		if (!interval)
			interval = suspend_time;
		/*
		 * suspend time format:
		 *  0-19: beacon interval in usec (time before exec.)
		 * 20-23: 0
		 * 24-31: number of beacons (suspend between channels)
		 */

		extra = (suspend_time / interval) << 24;
		scan_suspend_time = 0xFF0FFFFF &
		    (extra | ((suspend_time % interval) * 1024));

		scan->suspend_time = cpu_to_le32(scan_suspend_time);
		IWL_DEBUG_SCAN("suspend_time 0x%X beacon interval %d\n",
			       scan_suspend_time, interval);
	}

	/* We should add the ability for user to lock to PASSIVE ONLY */
	if (priv->one_direct_scan) {
		IWL_DEBUG_SCAN
		    ("Kicking off one direct scan for '%s'\n",
C
Christoph Hellwig 已提交
6198
		     iwl3945_escape_essid(priv->direct_ssid,
Z
Zhu Yi 已提交
6199 6200 6201 6202 6203 6204
				      priv->direct_ssid_len));
		scan->direct_scan[0].id = WLAN_EID_SSID;
		scan->direct_scan[0].len = priv->direct_ssid_len;
		memcpy(scan->direct_scan[0].ssid,
		       priv->direct_ssid, priv->direct_ssid_len);
		direct_mask = 1;
C
Christoph Hellwig 已提交
6205
	} else if (!iwl3945_is_associated(priv) && priv->essid_len) {
6206 6207 6208
		IWL_DEBUG_SCAN
		  ("Kicking off one direct scan for '%s' when not associated\n",
		   iwl3945_escape_essid(priv->essid, priv->essid_len));
Z
Zhu Yi 已提交
6209 6210 6211 6212
		scan->direct_scan[0].id = WLAN_EID_SSID;
		scan->direct_scan[0].len = priv->essid_len;
		memcpy(scan->direct_scan[0].ssid, priv->essid, priv->essid_len);
		direct_mask = 1;
6213 6214
	} else {
		IWL_DEBUG_SCAN("Kicking off one indirect scan.\n");
Z
Zhu Yi 已提交
6215
		direct_mask = 0;
6216
	}
Z
Zhu Yi 已提交
6217 6218 6219 6220

	/* We don't build a direct scan probe request; the uCode will do
	 * that based on the direct_mask added to each channel entry */
	scan->tx_cmd.len = cpu_to_le16(
C
Christoph Hellwig 已提交
6221
		iwl3945_fill_probe_req(priv, (struct ieee80211_mgmt *)scan->data,
6222
			IWL_MAX_SCAN_SIZE - sizeof(*scan), 0));
Z
Zhu Yi 已提交
6223 6224 6225 6226 6227 6228
	scan->tx_cmd.tx_flags = TX_CMD_FLG_SEQ_CTL_MSK;
	scan->tx_cmd.sta_id = priv->hw_setting.bcast_sta_id;
	scan->tx_cmd.stop_time.life_time = TX_CMD_LIFE_TIME_INFINITE;

	/* flags + rate selection */

6229
	if (priv->scan_bands & BIT(IEEE80211_BAND_2GHZ)) {
Z
Zhu Yi 已提交
6230 6231 6232
		scan->flags = RXON_FLG_BAND_24G_MSK | RXON_FLG_AUTO_DETECT_MSK;
		scan->tx_cmd.rate = IWL_RATE_1M_PLCP;
		scan->good_CRC_th = 0;
6233
		band = IEEE80211_BAND_2GHZ;
6234
	} else if (priv->scan_bands & BIT(IEEE80211_BAND_5GHZ)) {
Z
Zhu Yi 已提交
6235 6236
		scan->tx_cmd.rate = IWL_RATE_6M_PLCP;
		scan->good_CRC_th = IWL_GOOD_CRC_TH;
6237
		band = IEEE80211_BAND_5GHZ;
6238
	} else {
Z
Zhu Yi 已提交
6239 6240 6241 6242 6243 6244 6245 6246 6247 6248
		IWL_WARNING("Invalid scan band count\n");
		goto done;
	}

	/* select Rx antennas */
	scan->flags |= iwl3945_get_antenna_flags(priv);

	if (priv->iw_mode == IEEE80211_IF_TYPE_MNTR)
		scan->filter_flags = RXON_FILTER_PROMISC_MSK;

6249
	if (direct_mask)
6250 6251 6252 6253 6254
		scan->channel_count =
			iwl3945_get_channels_for_scan(
				priv, band, 1, /* active */
				direct_mask,
				(void *)&scan->data[le16_to_cpu(scan->tx_cmd.len)]);
6255
	else
6256 6257 6258 6259 6260
		scan->channel_count =
			iwl3945_get_channels_for_scan(
				priv, band, 0, /* passive */
				direct_mask,
				(void *)&scan->data[le16_to_cpu(scan->tx_cmd.len)]);
Z
Zhu Yi 已提交
6261 6262

	cmd.len += le16_to_cpu(scan->tx_cmd.len) +
C
Christoph Hellwig 已提交
6263
	    scan->channel_count * sizeof(struct iwl3945_scan_channel);
Z
Zhu Yi 已提交
6264 6265 6266 6267
	cmd.data = scan;
	scan->len = cpu_to_le16(cmd.len);

	set_bit(STATUS_SCAN_HW, &priv->status);
C
Christoph Hellwig 已提交
6268
	rc = iwl3945_send_cmd_sync(priv, &cmd);
Z
Zhu Yi 已提交
6269 6270 6271 6272 6273 6274 6275 6276 6277 6278
	if (rc)
		goto done;

	queue_delayed_work(priv->workqueue, &priv->scan_check,
			   IWL_SCAN_CHECK_WATCHDOG);

	mutex_unlock(&priv->mutex);
	return;

 done:
6279
	/* inform mac80211 scan aborted */
Z
Zhu Yi 已提交
6280 6281 6282 6283
	queue_work(priv->workqueue, &priv->scan_completed);
	mutex_unlock(&priv->mutex);
}

C
Christoph Hellwig 已提交
6284
static void iwl3945_bg_up(struct work_struct *data)
Z
Zhu Yi 已提交
6285
{
C
Christoph Hellwig 已提交
6286
	struct iwl3945_priv *priv = container_of(data, struct iwl3945_priv, up);
Z
Zhu Yi 已提交
6287 6288 6289 6290 6291

	if (test_bit(STATUS_EXIT_PENDING, &priv->status))
		return;

	mutex_lock(&priv->mutex);
C
Christoph Hellwig 已提交
6292
	__iwl3945_up(priv);
Z
Zhu Yi 已提交
6293
	mutex_unlock(&priv->mutex);
6294
	iwl3945_rfkill_set_hw_state(priv);
Z
Zhu Yi 已提交
6295 6296
}

C
Christoph Hellwig 已提交
6297
static void iwl3945_bg_restart(struct work_struct *data)
Z
Zhu Yi 已提交
6298
{
C
Christoph Hellwig 已提交
6299
	struct iwl3945_priv *priv = container_of(data, struct iwl3945_priv, restart);
Z
Zhu Yi 已提交
6300 6301 6302 6303

	if (test_bit(STATUS_EXIT_PENDING, &priv->status))
		return;

C
Christoph Hellwig 已提交
6304
	iwl3945_down(priv);
Z
Zhu Yi 已提交
6305 6306 6307
	queue_work(priv->workqueue, &priv->up);
}

C
Christoph Hellwig 已提交
6308
static void iwl3945_bg_rx_replenish(struct work_struct *data)
Z
Zhu Yi 已提交
6309
{
C
Christoph Hellwig 已提交
6310 6311
	struct iwl3945_priv *priv =
	    container_of(data, struct iwl3945_priv, rx_replenish);
Z
Zhu Yi 已提交
6312 6313 6314 6315 6316

	if (test_bit(STATUS_EXIT_PENDING, &priv->status))
		return;

	mutex_lock(&priv->mutex);
C
Christoph Hellwig 已提交
6317
	iwl3945_rx_replenish(priv);
Z
Zhu Yi 已提交
6318 6319 6320
	mutex_unlock(&priv->mutex);
}

6321 6322
#define IWL_DELAY_NEXT_SCAN (HZ*2)

C
Christoph Hellwig 已提交
6323
static void iwl3945_bg_post_associate(struct work_struct *data)
Z
Zhu Yi 已提交
6324
{
C
Christoph Hellwig 已提交
6325
	struct iwl3945_priv *priv = container_of(data, struct iwl3945_priv,
Z
Zhu Yi 已提交
6326 6327 6328 6329
					     post_associate.work);

	int rc = 0;
	struct ieee80211_conf *conf = NULL;
6330
	DECLARE_MAC_BUF(mac);
Z
Zhu Yi 已提交
6331 6332

	if (priv->iw_mode == IEEE80211_IF_TYPE_AP) {
6333
		IWL_ERROR("%s Should not be called in AP mode\n", __func__);
Z
Zhu Yi 已提交
6334 6335 6336 6337
		return;
	}


6338 6339 6340
	IWL_DEBUG_ASSOC("Associated as %d to: %s\n",
			priv->assoc_id,
			print_mac(mac, priv->active_rxon.bssid_addr));
Z
Zhu Yi 已提交
6341 6342 6343 6344 6345 6346

	if (test_bit(STATUS_EXIT_PENDING, &priv->status))
		return;

	mutex_lock(&priv->mutex);

6347
	if (!priv->vif || !priv->is_open) {
6348 6349 6350
		mutex_unlock(&priv->mutex);
		return;
	}
C
Christoph Hellwig 已提交
6351
	iwl3945_scan_cancel_timeout(priv, 200);
6352

Z
Zhu Yi 已提交
6353 6354 6355
	conf = ieee80211_get_hw_conf(priv->hw);

	priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
C
Christoph Hellwig 已提交
6356
	iwl3945_commit_rxon(priv);
Z
Zhu Yi 已提交
6357

C
Christoph Hellwig 已提交
6358 6359 6360
	memset(&priv->rxon_timing, 0, sizeof(struct iwl3945_rxon_time_cmd));
	iwl3945_setup_rxon_timing(priv);
	rc = iwl3945_send_cmd_pdu(priv, REPLY_RXON_TIMING,
Z
Zhu Yi 已提交
6361 6362 6363 6364 6365 6366 6367 6368 6369 6370 6371 6372 6373 6374 6375 6376 6377 6378 6379 6380 6381 6382 6383 6384 6385 6386 6387 6388
			      sizeof(priv->rxon_timing), &priv->rxon_timing);
	if (rc)
		IWL_WARNING("REPLY_RXON_TIMING failed - "
			    "Attempting to continue.\n");

	priv->staging_rxon.filter_flags |= RXON_FILTER_ASSOC_MSK;

	priv->staging_rxon.assoc_id = cpu_to_le16(priv->assoc_id);

	IWL_DEBUG_ASSOC("assoc id %d beacon interval %d\n",
			priv->assoc_id, priv->beacon_int);

	if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_PREAMBLE)
		priv->staging_rxon.flags |= RXON_FLG_SHORT_PREAMBLE_MSK;
	else
		priv->staging_rxon.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK;

	if (priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK) {
		if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_SLOT_TIME)
			priv->staging_rxon.flags |= RXON_FLG_SHORT_SLOT_MSK;
		else
			priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK;

		if (priv->iw_mode == IEEE80211_IF_TYPE_IBSS)
			priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK;

	}

C
Christoph Hellwig 已提交
6389
	iwl3945_commit_rxon(priv);
Z
Zhu Yi 已提交
6390 6391 6392

	switch (priv->iw_mode) {
	case IEEE80211_IF_TYPE_STA:
C
Christoph Hellwig 已提交
6393
		iwl3945_rate_scale_init(priv->hw, IWL_AP_ID);
Z
Zhu Yi 已提交
6394 6395 6396 6397 6398
		break;

	case IEEE80211_IF_TYPE_IBSS:

		/* clear out the station table */
C
Christoph Hellwig 已提交
6399
		iwl3945_clear_stations_table(priv);
Z
Zhu Yi 已提交
6400

C
Christoph Hellwig 已提交
6401 6402
		iwl3945_add_station(priv, iwl3945_broadcast_addr, 0, 0);
		iwl3945_add_station(priv, priv->bssid, 0, 0);
Z
Zhu Yi 已提交
6403
		iwl3945_sync_sta(priv, IWL_STA_ID,
6404
				 (priv->band == IEEE80211_BAND_5GHZ) ?
Z
Zhu Yi 已提交
6405 6406
				 IWL_RATE_6M_PLCP : IWL_RATE_1M_PLCP,
				 CMD_ASYNC);
C
Christoph Hellwig 已提交
6407 6408
		iwl3945_rate_scale_init(priv->hw, IWL_STA_ID);
		iwl3945_send_beacon_cmd(priv);
Z
Zhu Yi 已提交
6409 6410 6411 6412 6413

		break;

	default:
		 IWL_ERROR("%s Should not be called in %d mode\n",
6414
			   __func__, priv->iw_mode);
Z
Zhu Yi 已提交
6415 6416 6417
		break;
	}

C
Christoph Hellwig 已提交
6418
	iwl3945_activate_qos(priv, 0);
6419

6420 6421
	/* we have just associated, don't start scan too early */
	priv->next_scan_jiffies = jiffies + IWL_DELAY_NEXT_SCAN;
Z
Zhu Yi 已提交
6422 6423 6424
	mutex_unlock(&priv->mutex);
}

C
Christoph Hellwig 已提交
6425
static void iwl3945_bg_abort_scan(struct work_struct *work)
Z
Zhu Yi 已提交
6426
{
C
Christoph Hellwig 已提交
6427
	struct iwl3945_priv *priv = container_of(work, struct iwl3945_priv, abort_scan);
Z
Zhu Yi 已提交
6428

C
Christoph Hellwig 已提交
6429
	if (!iwl3945_is_ready(priv))
Z
Zhu Yi 已提交
6430 6431 6432 6433 6434
		return;

	mutex_lock(&priv->mutex);

	set_bit(STATUS_SCAN_ABORTING, &priv->status);
C
Christoph Hellwig 已提交
6435
	iwl3945_send_scan_abort(priv);
Z
Zhu Yi 已提交
6436 6437 6438 6439

	mutex_unlock(&priv->mutex);
}

6440 6441
static int iwl3945_mac_config(struct ieee80211_hw *hw, struct ieee80211_conf *conf);

C
Christoph Hellwig 已提交
6442
static void iwl3945_bg_scan_completed(struct work_struct *work)
Z
Zhu Yi 已提交
6443
{
C
Christoph Hellwig 已提交
6444 6445
	struct iwl3945_priv *priv =
	    container_of(work, struct iwl3945_priv, scan_completed);
Z
Zhu Yi 已提交
6446 6447 6448 6449 6450 6451

	IWL_DEBUG(IWL_DL_INFO | IWL_DL_SCAN, "SCAN complete scan\n");

	if (test_bit(STATUS_EXIT_PENDING, &priv->status))
		return;

6452 6453
	if (test_bit(STATUS_CONF_PENDING, &priv->status))
		iwl3945_mac_config(priv->hw, ieee80211_get_hw_conf(priv->hw));
6454

Z
Zhu Yi 已提交
6455 6456 6457 6458 6459
	ieee80211_scan_completed(priv->hw);

	/* Since setting the TXPOWER may have been deferred while
	 * performing the scan, fire one off */
	mutex_lock(&priv->mutex);
C
Christoph Hellwig 已提交
6460
	iwl3945_hw_reg_send_txpower(priv);
Z
Zhu Yi 已提交
6461 6462 6463 6464 6465 6466 6467 6468 6469
	mutex_unlock(&priv->mutex);
}

/*****************************************************************************
 *
 * mac80211 entry point functions
 *
 *****************************************************************************/

6470 6471
#define UCODE_READY_TIMEOUT	(2 * HZ)

C
Christoph Hellwig 已提交
6472
static int iwl3945_mac_start(struct ieee80211_hw *hw)
Z
Zhu Yi 已提交
6473
{
C
Christoph Hellwig 已提交
6474
	struct iwl3945_priv *priv = hw->priv;
6475
	int ret;
Z
Zhu Yi 已提交
6476 6477 6478

	IWL_DEBUG_MAC80211("enter\n");

6479 6480 6481 6482 6483 6484 6485 6486 6487 6488 6489 6490 6491 6492
	if (pci_enable_device(priv->pci_dev)) {
		IWL_ERROR("Fail to pci_enable_device\n");
		return -ENODEV;
	}
	pci_restore_state(priv->pci_dev);
	pci_enable_msi(priv->pci_dev);

	ret = request_irq(priv->pci_dev->irq, iwl3945_isr, IRQF_SHARED,
			  DRV_NAME, priv);
	if (ret) {
		IWL_ERROR("Error allocating IRQ %d\n", priv->pci_dev->irq);
		goto out_disable_msi;
	}

Z
Zhu Yi 已提交
6493 6494 6495
	/* we should be verifying the device is ready to be opened */
	mutex_lock(&priv->mutex);

6496 6497 6498 6499 6500 6501 6502 6503 6504 6505 6506 6507
	memset(&priv->staging_rxon, 0, sizeof(struct iwl3945_rxon_cmd));
	/* fetch ucode file from disk, alloc and copy to bus-master buffers ...
	 * ucode filename and max sizes are card-specific. */

	if (!priv->ucode_code.len) {
		ret = iwl3945_read_ucode(priv);
		if (ret) {
			IWL_ERROR("Could not read microcode: %d\n", ret);
			mutex_unlock(&priv->mutex);
			goto out_release_irq;
		}
	}
Z
Zhu Yi 已提交
6508

6509
	ret = __iwl3945_up(priv);
Z
Zhu Yi 已提交
6510 6511

	mutex_unlock(&priv->mutex);
6512

6513 6514
	iwl3945_rfkill_set_hw_state(priv);

6515 6516 6517 6518 6519 6520 6521 6522
	if (ret)
		goto out_release_irq;

	IWL_DEBUG_INFO("Start UP work.\n");

	if (test_bit(STATUS_IN_SUSPEND, &priv->status))
		return 0;

6523 6524 6525 6526 6527 6528 6529 6530 6531 6532 6533 6534 6535 6536
	/* Wait for START_ALIVE from ucode. Otherwise callbacks from
	 * mac80211 will not be run successfully. */
	ret = wait_event_interruptible_timeout(priv->wait_command_queue,
			test_bit(STATUS_READY, &priv->status),
			UCODE_READY_TIMEOUT);
	if (!ret) {
		if (!test_bit(STATUS_READY, &priv->status)) {
			IWL_ERROR("Wait for START_ALIVE timeout after %dms.\n",
				  jiffies_to_msecs(UCODE_READY_TIMEOUT));
			ret = -ETIMEDOUT;
			goto out_release_irq;
		}
	}

6537
	priv->is_open = 1;
Z
Zhu Yi 已提交
6538 6539
	IWL_DEBUG_MAC80211("leave\n");
	return 0;
6540 6541 6542 6543 6544

out_release_irq:
	free_irq(priv->pci_dev->irq, priv);
out_disable_msi:
	pci_disable_msi(priv->pci_dev);
6545 6546 6547
	pci_disable_device(priv->pci_dev);
	priv->is_open = 0;
	IWL_DEBUG_MAC80211("leave - failed\n");
6548
	return ret;
Z
Zhu Yi 已提交
6549 6550
}

C
Christoph Hellwig 已提交
6551
static void iwl3945_mac_stop(struct ieee80211_hw *hw)
Z
Zhu Yi 已提交
6552
{
C
Christoph Hellwig 已提交
6553
	struct iwl3945_priv *priv = hw->priv;
Z
Zhu Yi 已提交
6554 6555

	IWL_DEBUG_MAC80211("enter\n");
6556

6557 6558 6559 6560 6561
	if (!priv->is_open) {
		IWL_DEBUG_MAC80211("leave - skip\n");
		return;
	}

Z
Zhu Yi 已提交
6562
	priv->is_open = 0;
6563 6564

	if (iwl3945_is_ready_rf(priv)) {
6565 6566 6567
		/* stop mac, cancel any scan request and clear
		 * RXON_FILTER_ASSOC_MSK BIT
		 */
6568 6569 6570
		mutex_lock(&priv->mutex);
		iwl3945_scan_cancel_timeout(priv, 100);
		cancel_delayed_work(&priv->post_associate);
6571 6572 6573
		mutex_unlock(&priv->mutex);
	}

6574 6575 6576 6577 6578 6579 6580
	iwl3945_down(priv);

	flush_workqueue(priv->workqueue);
	free_irq(priv->pci_dev->irq, priv);
	pci_disable_msi(priv->pci_dev);
	pci_save_state(priv->pci_dev);
	pci_disable_device(priv->pci_dev);
6581

Z
Zhu Yi 已提交
6582 6583 6584
	IWL_DEBUG_MAC80211("leave\n");
}

6585
static int iwl3945_mac_tx(struct ieee80211_hw *hw, struct sk_buff *skb)
Z
Zhu Yi 已提交
6586
{
C
Christoph Hellwig 已提交
6587
	struct iwl3945_priv *priv = hw->priv;
Z
Zhu Yi 已提交
6588 6589 6590 6591

	IWL_DEBUG_MAC80211("enter\n");

	IWL_DEBUG_TX("dev->xmit(%d bytes) at rate 0x%02x\n", skb->len,
6592
		     ieee80211_get_tx_rate(hw, IEEE80211_SKB_CB(skb))->bitrate);
Z
Zhu Yi 已提交
6593

6594
	if (iwl3945_tx_skb(priv, skb))
Z
Zhu Yi 已提交
6595 6596 6597 6598 6599 6600
		dev_kfree_skb_any(skb);

	IWL_DEBUG_MAC80211("leave\n");
	return 0;
}

C
Christoph Hellwig 已提交
6601
static int iwl3945_mac_add_interface(struct ieee80211_hw *hw,
Z
Zhu Yi 已提交
6602 6603
				 struct ieee80211_if_init_conf *conf)
{
C
Christoph Hellwig 已提交
6604
	struct iwl3945_priv *priv = hw->priv;
Z
Zhu Yi 已提交
6605
	unsigned long flags;
6606
	DECLARE_MAC_BUF(mac);
Z
Zhu Yi 已提交
6607

6608
	IWL_DEBUG_MAC80211("enter: type %d\n", conf->type);
Z
Zhu Yi 已提交
6609

6610 6611
	if (priv->vif) {
		IWL_DEBUG_MAC80211("leave - vif != NULL\n");
6612
		return -EOPNOTSUPP;
Z
Zhu Yi 已提交
6613 6614 6615
	}

	spin_lock_irqsave(&priv->lock, flags);
6616
	priv->vif = conf->vif;
Z
Zhu Yi 已提交
6617 6618 6619 6620

	spin_unlock_irqrestore(&priv->lock, flags);

	mutex_lock(&priv->mutex);
6621 6622 6623 6624 6625 6626

	if (conf->mac_addr) {
		IWL_DEBUG_MAC80211("Set: %s\n", print_mac(mac, conf->mac_addr));
		memcpy(priv->mac_addr, conf->mac_addr, ETH_ALEN);
	}

6627 6628
	if (iwl3945_is_ready(priv))
		iwl3945_set_mode(priv, conf->type);
Z
Zhu Yi 已提交
6629 6630 6631

	mutex_unlock(&priv->mutex);

6632
	IWL_DEBUG_MAC80211("leave\n");
Z
Zhu Yi 已提交
6633 6634 6635 6636
	return 0;
}

/**
C
Christoph Hellwig 已提交
6637
 * iwl3945_mac_config - mac80211 config callback
Z
Zhu Yi 已提交
6638 6639 6640 6641 6642
 *
 * We ignore conf->flags & IEEE80211_CONF_SHORT_SLOT_TIME since it seems to
 * be set inappropriately and the driver currently sets the hardware up to
 * use it whenever needed.
 */
C
Christoph Hellwig 已提交
6643
static int iwl3945_mac_config(struct ieee80211_hw *hw, struct ieee80211_conf *conf)
Z
Zhu Yi 已提交
6644
{
C
Christoph Hellwig 已提交
6645 6646
	struct iwl3945_priv *priv = hw->priv;
	const struct iwl3945_channel_info *ch_info;
Z
Zhu Yi 已提交
6647
	unsigned long flags;
6648
	int ret = 0;
Z
Zhu Yi 已提交
6649 6650

	mutex_lock(&priv->mutex);
6651
	IWL_DEBUG_MAC80211("enter to channel %d\n", conf->channel->hw_value);
Z
Zhu Yi 已提交
6652

C
Christoph Hellwig 已提交
6653
	if (!iwl3945_is_ready(priv)) {
Z
Zhu Yi 已提交
6654
		IWL_DEBUG_MAC80211("leave - not ready\n");
6655 6656
		ret = -EIO;
		goto out;
Z
Zhu Yi 已提交
6657 6658
	}

C
Christoph Hellwig 已提交
6659
	if (unlikely(!iwl3945_param_disable_hw_scan &&
Z
Zhu Yi 已提交
6660
		     test_bit(STATUS_SCANNING, &priv->status))) {
6661 6662
		IWL_DEBUG_MAC80211("leave - scanning\n");
		set_bit(STATUS_CONF_PENDING, &priv->status);
Z
Zhu Yi 已提交
6663
		mutex_unlock(&priv->mutex);
6664
		return 0;
Z
Zhu Yi 已提交
6665 6666 6667 6668
	}

	spin_lock_irqsave(&priv->lock, flags);

6669 6670
	ch_info = iwl3945_get_channel_info(priv, conf->channel->band,
					   conf->channel->hw_value);
Z
Zhu Yi 已提交
6671
	if (!is_channel_valid(ch_info)) {
6672
		IWL_DEBUG_SCAN("Channel %d [%d] is INVALID for this band.\n",
6673
			       conf->channel->hw_value, conf->channel->band);
Z
Zhu Yi 已提交
6674 6675
		IWL_DEBUG_MAC80211("leave - invalid channel\n");
		spin_unlock_irqrestore(&priv->lock, flags);
6676 6677
		ret = -EINVAL;
		goto out;
Z
Zhu Yi 已提交
6678 6679
	}

6680
	iwl3945_set_rxon_channel(priv, conf->channel->band, conf->channel->hw_value);
Z
Zhu Yi 已提交
6681

6682
	iwl3945_set_flags_for_phymode(priv, conf->channel->band);
Z
Zhu Yi 已提交
6683 6684 6685 6686

	/* The list of supported rates and rate mask can be different
	 * for each phymode; since the phymode may have changed, reset
	 * the rate mask to what mac80211 lists */
C
Christoph Hellwig 已提交
6687
	iwl3945_set_rate(priv);
Z
Zhu Yi 已提交
6688 6689 6690 6691 6692

	spin_unlock_irqrestore(&priv->lock, flags);

#ifdef IEEE80211_CONF_CHANNEL_SWITCH
	if (conf->flags & IEEE80211_CONF_CHANNEL_SWITCH) {
C
Christoph Hellwig 已提交
6693
		iwl3945_hw_channel_switch(priv, conf->channel);
6694
		goto out;
Z
Zhu Yi 已提交
6695 6696 6697
	}
#endif

C
Christoph Hellwig 已提交
6698
	iwl3945_radio_kill_sw(priv, !conf->radio_enabled);
Z
Zhu Yi 已提交
6699 6700 6701

	if (!conf->radio_enabled) {
		IWL_DEBUG_MAC80211("leave - radio disabled\n");
6702
		goto out;
Z
Zhu Yi 已提交
6703 6704
	}

C
Christoph Hellwig 已提交
6705
	if (iwl3945_is_rfkill(priv)) {
Z
Zhu Yi 已提交
6706
		IWL_DEBUG_MAC80211("leave - RF kill\n");
6707 6708
		ret = -EIO;
		goto out;
Z
Zhu Yi 已提交
6709 6710
	}

C
Christoph Hellwig 已提交
6711
	iwl3945_set_rate(priv);
Z
Zhu Yi 已提交
6712 6713 6714

	if (memcmp(&priv->active_rxon,
		   &priv->staging_rxon, sizeof(priv->staging_rxon)))
C
Christoph Hellwig 已提交
6715
		iwl3945_commit_rxon(priv);
Z
Zhu Yi 已提交
6716 6717 6718 6719 6720
	else
		IWL_DEBUG_INFO("No re-sending same RXON configuration.\n");

	IWL_DEBUG_MAC80211("leave\n");

6721
out:
6722
	clear_bit(STATUS_CONF_PENDING, &priv->status);
Z
Zhu Yi 已提交
6723
	mutex_unlock(&priv->mutex);
6724
	return ret;
Z
Zhu Yi 已提交
6725 6726
}

C
Christoph Hellwig 已提交
6727
static void iwl3945_config_ap(struct iwl3945_priv *priv)
Z
Zhu Yi 已提交
6728 6729 6730
{
	int rc = 0;

6731
	if (test_bit(STATUS_EXIT_PENDING, &priv->status))
Z
Zhu Yi 已提交
6732 6733 6734
		return;

	/* The following should be done only at AP bring up */
6735
	if (!(iwl3945_is_associated(priv))) {
Z
Zhu Yi 已提交
6736 6737 6738

		/* RXON - unassoc (to set timing command) */
		priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
C
Christoph Hellwig 已提交
6739
		iwl3945_commit_rxon(priv);
Z
Zhu Yi 已提交
6740 6741

		/* RXON Timing */
C
Christoph Hellwig 已提交
6742 6743 6744
		memset(&priv->rxon_timing, 0, sizeof(struct iwl3945_rxon_time_cmd));
		iwl3945_setup_rxon_timing(priv);
		rc = iwl3945_send_cmd_pdu(priv, REPLY_RXON_TIMING,
Z
Zhu Yi 已提交
6745 6746 6747 6748 6749 6750 6751 6752 6753 6754 6755 6756 6757 6758 6759 6760 6761 6762 6763 6764 6765 6766 6767 6768 6769 6770 6771 6772 6773
				sizeof(priv->rxon_timing), &priv->rxon_timing);
		if (rc)
			IWL_WARNING("REPLY_RXON_TIMING failed - "
					"Attempting to continue.\n");

		/* FIXME: what should be the assoc_id for AP? */
		priv->staging_rxon.assoc_id = cpu_to_le16(priv->assoc_id);
		if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_PREAMBLE)
			priv->staging_rxon.flags |=
				RXON_FLG_SHORT_PREAMBLE_MSK;
		else
			priv->staging_rxon.flags &=
				~RXON_FLG_SHORT_PREAMBLE_MSK;

		if (priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK) {
			if (priv->assoc_capability &
				WLAN_CAPABILITY_SHORT_SLOT_TIME)
				priv->staging_rxon.flags |=
					RXON_FLG_SHORT_SLOT_MSK;
			else
				priv->staging_rxon.flags &=
					~RXON_FLG_SHORT_SLOT_MSK;

			if (priv->iw_mode == IEEE80211_IF_TYPE_IBSS)
				priv->staging_rxon.flags &=
					~RXON_FLG_SHORT_SLOT_MSK;
		}
		/* restore RXON assoc */
		priv->staging_rxon.filter_flags |= RXON_FILTER_ASSOC_MSK;
C
Christoph Hellwig 已提交
6774 6775
		iwl3945_commit_rxon(priv);
		iwl3945_add_station(priv, iwl3945_broadcast_addr, 0, 0);
6776
	}
C
Christoph Hellwig 已提交
6777
	iwl3945_send_beacon_cmd(priv);
Z
Zhu Yi 已提交
6778 6779 6780 6781 6782 6783

	/* FIXME - we need to add code here to detect a totally new
	 * configuration, reset the AP, unassoc, rxon timing, assoc,
	 * clear sta table, add BCAST sta... */
}

6784 6785 6786
/* temporary */
static int iwl3945_mac_beacon_update(struct ieee80211_hw *hw, struct sk_buff *skb);

6787 6788
static int iwl3945_mac_config_interface(struct ieee80211_hw *hw,
					struct ieee80211_vif *vif,
Z
Zhu Yi 已提交
6789 6790
				    struct ieee80211_if_conf *conf)
{
C
Christoph Hellwig 已提交
6791
	struct iwl3945_priv *priv = hw->priv;
6792
	DECLARE_MAC_BUF(mac);
Z
Zhu Yi 已提交
6793 6794 6795 6796 6797 6798
	unsigned long flags;
	int rc;

	if (conf == NULL)
		return -EIO;

6799 6800 6801 6802 6803
	if (priv->vif != vif) {
		IWL_DEBUG_MAC80211("leave - priv->vif != vif\n");
		return 0;
	}

6804 6805 6806 6807 6808 6809 6810 6811 6812 6813 6814
	/* handle this temporarily here */
	if (priv->iw_mode == IEEE80211_IF_TYPE_IBSS &&
	    conf->changed & IEEE80211_IFCC_BEACON) {
		struct sk_buff *beacon = ieee80211_beacon_get(hw, vif);
		if (!beacon)
			return -ENOMEM;
		rc = iwl3945_mac_beacon_update(hw, beacon);
		if (rc)
			return rc;
	}

6815 6816
	/* XXX: this MUST use conf->mac_addr */

Z
Zhu Yi 已提交
6817
	if ((priv->iw_mode == IEEE80211_IF_TYPE_AP) &&
6818
	    (!conf->ssid_len)) {
Z
Zhu Yi 已提交
6819 6820 6821 6822 6823
		IWL_DEBUG_MAC80211
		    ("Leaving in AP mode because HostAPD is not ready.\n");
		return 0;
	}

6824 6825 6826
	if (!iwl3945_is_alive(priv))
		return -EAGAIN;

Z
Zhu Yi 已提交
6827 6828 6829
	mutex_lock(&priv->mutex);

	if (conf->bssid)
6830 6831
		IWL_DEBUG_MAC80211("bssid: %s\n",
				   print_mac(mac, conf->bssid));
Z
Zhu Yi 已提交
6832

6833 6834 6835
/*
 * very dubious code was here; the probe filtering flag is never set:
 *
Z
Zhu Yi 已提交
6836 6837
	if (unlikely(test_bit(STATUS_SCANNING, &priv->status)) &&
	    !(priv->hw->flags & IEEE80211_HW_NO_PROBE_FILTERING)) {
6838
 */
Z
Zhu Yi 已提交
6839 6840 6841 6842 6843

	if (priv->iw_mode == IEEE80211_IF_TYPE_AP) {
		if (!conf->bssid) {
			conf->bssid = priv->mac_addr;
			memcpy(priv->bssid, priv->mac_addr, ETH_ALEN);
6844 6845
			IWL_DEBUG_MAC80211("bssid was set to: %s\n",
					   print_mac(mac, conf->bssid));
Z
Zhu Yi 已提交
6846 6847 6848 6849
		}
		if (priv->ibss_beacon)
			dev_kfree_skb(priv->ibss_beacon);

6850
		priv->ibss_beacon = ieee80211_beacon_get(hw, vif);
Z
Zhu Yi 已提交
6851 6852
	}

6853 6854 6855
	if (iwl3945_is_rfkill(priv))
		goto done;

Z
Zhu Yi 已提交
6856 6857 6858 6859
	if (conf->bssid && !is_zero_ether_addr(conf->bssid) &&
	    !is_multicast_ether_addr(conf->bssid)) {
		/* If there is currently a HW scan going on in the background
		 * then we need to cancel it else the RXON below will fail. */
C
Christoph Hellwig 已提交
6860
		if (iwl3945_scan_cancel_timeout(priv, 100)) {
Z
Zhu Yi 已提交
6861 6862 6863 6864 6865 6866 6867 6868 6869 6870 6871 6872 6873 6874 6875
			IWL_WARNING("Aborted scan still in progress "
				    "after 100ms\n");
			IWL_DEBUG_MAC80211("leaving - scan abort failed.\n");
			mutex_unlock(&priv->mutex);
			return -EAGAIN;
		}
		memcpy(priv->staging_rxon.bssid_addr, conf->bssid, ETH_ALEN);

		/* TODO: Audit driver for usage of these members and see
		 * if mac80211 deprecates them (priv->bssid looks like it
		 * shouldn't be there, but I haven't scanned the IBSS code
		 * to verify) - jpk */
		memcpy(priv->bssid, conf->bssid, ETH_ALEN);

		if (priv->iw_mode == IEEE80211_IF_TYPE_AP)
C
Christoph Hellwig 已提交
6876
			iwl3945_config_ap(priv);
Z
Zhu Yi 已提交
6877
		else {
C
Christoph Hellwig 已提交
6878
			rc = iwl3945_commit_rxon(priv);
Z
Zhu Yi 已提交
6879
			if ((priv->iw_mode == IEEE80211_IF_TYPE_STA) && rc)
C
Christoph Hellwig 已提交
6880
				iwl3945_add_station(priv,
6881
					priv->active_rxon.bssid_addr, 1, 0);
Z
Zhu Yi 已提交
6882 6883 6884
		}

	} else {
C
Christoph Hellwig 已提交
6885
		iwl3945_scan_cancel_timeout(priv, 100);
Z
Zhu Yi 已提交
6886
		priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
C
Christoph Hellwig 已提交
6887
		iwl3945_commit_rxon(priv);
Z
Zhu Yi 已提交
6888 6889
	}

6890
 done:
Z
Zhu Yi 已提交
6891 6892 6893 6894 6895 6896 6897 6898 6899 6900 6901 6902 6903 6904 6905
	spin_lock_irqsave(&priv->lock, flags);
	if (!conf->ssid_len)
		memset(priv->essid, 0, IW_ESSID_MAX_SIZE);
	else
		memcpy(priv->essid, conf->ssid, conf->ssid_len);

	priv->essid_len = conf->ssid_len;
	spin_unlock_irqrestore(&priv->lock, flags);

	IWL_DEBUG_MAC80211("leave\n");
	mutex_unlock(&priv->mutex);

	return 0;
}

C
Christoph Hellwig 已提交
6906
static void iwl3945_configure_filter(struct ieee80211_hw *hw,
6907 6908 6909 6910
				 unsigned int changed_flags,
				 unsigned int *total_flags,
				 int mc_count, struct dev_addr_list *mc_list)
{
6911
	struct iwl3945_priv *priv = hw->priv;
6912 6913 6914 6915 6916 6917 6918 6919

	if (changed_flags & (*total_flags) & FIF_OTHER_BSS) {
		IWL_DEBUG_MAC80211("Enter: type %d (0x%x, 0x%x)\n",
				   IEEE80211_IF_TYPE_MNTR,
				   changed_flags, *total_flags);
		/* queue work 'cuz mac80211 is holding a lock which
		 * prevents us from issuing (synchronous) f/w cmds */
		queue_work(priv->workqueue, &priv->set_monitor);
6920
	}
6921 6922
	*total_flags &= FIF_OTHER_BSS | FIF_ALLMULTI |
			FIF_BCN_PRBRESP_PROMISC | FIF_CONTROL;
6923 6924
}

C
Christoph Hellwig 已提交
6925
static void iwl3945_mac_remove_interface(struct ieee80211_hw *hw,
Z
Zhu Yi 已提交
6926 6927
				     struct ieee80211_if_init_conf *conf)
{
C
Christoph Hellwig 已提交
6928
	struct iwl3945_priv *priv = hw->priv;
Z
Zhu Yi 已提交
6929 6930 6931 6932

	IWL_DEBUG_MAC80211("enter\n");

	mutex_lock(&priv->mutex);
6933

6934 6935 6936 6937 6938 6939
	if (iwl3945_is_ready_rf(priv)) {
		iwl3945_scan_cancel_timeout(priv, 100);
		cancel_delayed_work(&priv->post_associate);
		priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
		iwl3945_commit_rxon(priv);
	}
6940 6941
	if (priv->vif == conf->vif) {
		priv->vif = NULL;
Z
Zhu Yi 已提交
6942 6943 6944 6945 6946 6947 6948 6949 6950
		memset(priv->bssid, 0, ETH_ALEN);
		memset(priv->essid, 0, IW_ESSID_MAX_SIZE);
		priv->essid_len = 0;
	}
	mutex_unlock(&priv->mutex);

	IWL_DEBUG_MAC80211("leave\n");
}

C
Christoph Hellwig 已提交
6951
static int iwl3945_mac_hw_scan(struct ieee80211_hw *hw, u8 *ssid, size_t len)
Z
Zhu Yi 已提交
6952 6953 6954
{
	int rc = 0;
	unsigned long flags;
C
Christoph Hellwig 已提交
6955
	struct iwl3945_priv *priv = hw->priv;
Z
Zhu Yi 已提交
6956 6957 6958

	IWL_DEBUG_MAC80211("enter\n");

6959
	mutex_lock(&priv->mutex);
Z
Zhu Yi 已提交
6960 6961
	spin_lock_irqsave(&priv->lock, flags);

C
Christoph Hellwig 已提交
6962
	if (!iwl3945_is_ready_rf(priv)) {
Z
Zhu Yi 已提交
6963 6964 6965 6966 6967 6968 6969 6970 6971 6972 6973
		rc = -EIO;
		IWL_DEBUG_MAC80211("leave - not ready or exit pending\n");
		goto out_unlock;
	}

	if (priv->iw_mode == IEEE80211_IF_TYPE_AP) {	/* APs don't scan */
		rc = -EIO;
		IWL_ERROR("ERROR: APs don't scan\n");
		goto out_unlock;
	}

6974 6975 6976 6977 6978 6979
	/* we don't schedule scan within next_scan_jiffies period */
	if (priv->next_scan_jiffies &&
			time_after(priv->next_scan_jiffies, jiffies)) {
		rc = -EAGAIN;
		goto out_unlock;
	}
6980 6981 6982 6983
	/* if we just finished scan ask for delay for a broadcast scan */
	if ((len == 0) && priv->last_scan_jiffies &&
	    time_after(priv->last_scan_jiffies + IWL_DELAY_NEXT_SCAN,
		       jiffies)) {
Z
Zhu Yi 已提交
6984 6985 6986 6987
		rc = -EAGAIN;
		goto out_unlock;
	}
	if (len) {
6988
		IWL_DEBUG_SCAN("direct scan for %s [%d]\n ",
C
Christoph Hellwig 已提交
6989
			       iwl3945_escape_essid(ssid, len), (int)len);
Z
Zhu Yi 已提交
6990 6991 6992 6993 6994

		priv->one_direct_scan = 1;
		priv->direct_ssid_len = (u8)
		    min((u8) len, (u8) IW_ESSID_MAX_SIZE);
		memcpy(priv->direct_ssid, ssid, priv->direct_ssid_len);
6995 6996
	} else
		priv->one_direct_scan = 0;
Z
Zhu Yi 已提交
6997

C
Christoph Hellwig 已提交
6998
	rc = iwl3945_scan_initiate(priv);
Z
Zhu Yi 已提交
6999 7000 7001 7002 7003

	IWL_DEBUG_MAC80211("leave\n");

out_unlock:
	spin_unlock_irqrestore(&priv->lock, flags);
7004
	mutex_unlock(&priv->mutex);
Z
Zhu Yi 已提交
7005 7006 7007 7008

	return rc;
}

C
Christoph Hellwig 已提交
7009
static int iwl3945_mac_set_key(struct ieee80211_hw *hw, enum set_key_cmd cmd,
Z
Zhu Yi 已提交
7010 7011 7012
			   const u8 *local_addr, const u8 *addr,
			   struct ieee80211_key_conf *key)
{
C
Christoph Hellwig 已提交
7013
	struct iwl3945_priv *priv = hw->priv;
Z
Zhu Yi 已提交
7014 7015 7016 7017 7018
	int rc = 0;
	u8 sta_id;

	IWL_DEBUG_MAC80211("enter\n");

C
Christoph Hellwig 已提交
7019
	if (!iwl3945_param_hwcrypto) {
Z
Zhu Yi 已提交
7020 7021 7022 7023 7024 7025 7026 7027
		IWL_DEBUG_MAC80211("leave - hwcrypto disabled\n");
		return -EOPNOTSUPP;
	}

	if (is_zero_ether_addr(addr))
		/* only support pairwise keys */
		return -EOPNOTSUPP;

C
Christoph Hellwig 已提交
7028
	sta_id = iwl3945_hw_find_station(priv, addr);
Z
Zhu Yi 已提交
7029
	if (sta_id == IWL_INVALID_STATION) {
7030 7031 7032 7033
		DECLARE_MAC_BUF(mac);

		IWL_DEBUG_MAC80211("leave - %s not in station map.\n",
				   print_mac(mac, addr));
Z
Zhu Yi 已提交
7034 7035 7036 7037 7038
		return -EINVAL;
	}

	mutex_lock(&priv->mutex);

C
Christoph Hellwig 已提交
7039
	iwl3945_scan_cancel_timeout(priv, 100);
7040

Z
Zhu Yi 已提交
7041 7042
	switch (cmd) {
	case  SET_KEY:
C
Christoph Hellwig 已提交
7043
		rc = iwl3945_update_sta_key_info(priv, key, sta_id);
Z
Zhu Yi 已提交
7044
		if (!rc) {
C
Christoph Hellwig 已提交
7045 7046
			iwl3945_set_rxon_hwcrypto(priv, 1);
			iwl3945_commit_rxon(priv);
Z
Zhu Yi 已提交
7047 7048 7049 7050 7051 7052
			key->hw_key_idx = sta_id;
			IWL_DEBUG_MAC80211("set_key success, using hwcrypto\n");
			key->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
		}
		break;
	case DISABLE_KEY:
C
Christoph Hellwig 已提交
7053
		rc = iwl3945_clear_sta_key_info(priv, sta_id);
Z
Zhu Yi 已提交
7054
		if (!rc) {
C
Christoph Hellwig 已提交
7055 7056
			iwl3945_set_rxon_hwcrypto(priv, 0);
			iwl3945_commit_rxon(priv);
Z
Zhu Yi 已提交
7057 7058 7059 7060 7061 7062 7063 7064 7065 7066 7067 7068 7069
			IWL_DEBUG_MAC80211("disable hwcrypto key\n");
		}
		break;
	default:
		rc = -EINVAL;
	}

	IWL_DEBUG_MAC80211("leave\n");
	mutex_unlock(&priv->mutex);

	return rc;
}

J
Johannes Berg 已提交
7070
static int iwl3945_mac_conf_tx(struct ieee80211_hw *hw, u16 queue,
Z
Zhu Yi 已提交
7071 7072
			   const struct ieee80211_tx_queue_params *params)
{
C
Christoph Hellwig 已提交
7073
	struct iwl3945_priv *priv = hw->priv;
Z
Zhu Yi 已提交
7074 7075 7076 7077 7078
	unsigned long flags;
	int q;

	IWL_DEBUG_MAC80211("enter\n");

C
Christoph Hellwig 已提交
7079
	if (!iwl3945_is_ready_rf(priv)) {
Z
Zhu Yi 已提交
7080 7081 7082 7083 7084 7085 7086 7087 7088 7089 7090 7091 7092 7093 7094 7095 7096 7097 7098 7099 7100 7101
		IWL_DEBUG_MAC80211("leave - RF not ready\n");
		return -EIO;
	}

	if (queue >= AC_NUM) {
		IWL_DEBUG_MAC80211("leave - queue >= AC_NUM %d\n", queue);
		return 0;
	}

	if (!priv->qos_data.qos_enable) {
		priv->qos_data.qos_active = 0;
		IWL_DEBUG_MAC80211("leave - qos not enabled\n");
		return 0;
	}
	q = AC_NUM - 1 - queue;

	spin_lock_irqsave(&priv->lock, flags);

	priv->qos_data.def_qos_parm.ac[q].cw_min = cpu_to_le16(params->cw_min);
	priv->qos_data.def_qos_parm.ac[q].cw_max = cpu_to_le16(params->cw_max);
	priv->qos_data.def_qos_parm.ac[q].aifsn = params->aifs;
	priv->qos_data.def_qos_parm.ac[q].edca_txop =
7102
			cpu_to_le16((params->txop * 32));
Z
Zhu Yi 已提交
7103 7104 7105 7106 7107 7108 7109 7110

	priv->qos_data.def_qos_parm.ac[q].reserved1 = 0;
	priv->qos_data.qos_active = 1;

	spin_unlock_irqrestore(&priv->lock, flags);

	mutex_lock(&priv->mutex);
	if (priv->iw_mode == IEEE80211_IF_TYPE_AP)
C
Christoph Hellwig 已提交
7111 7112 7113
		iwl3945_activate_qos(priv, 1);
	else if (priv->assoc_id && iwl3945_is_associated(priv))
		iwl3945_activate_qos(priv, 0);
Z
Zhu Yi 已提交
7114 7115 7116 7117 7118 7119 7120

	mutex_unlock(&priv->mutex);

	IWL_DEBUG_MAC80211("leave\n");
	return 0;
}

C
Christoph Hellwig 已提交
7121
static int iwl3945_mac_get_tx_stats(struct ieee80211_hw *hw,
Z
Zhu Yi 已提交
7122 7123
				struct ieee80211_tx_queue_stats *stats)
{
C
Christoph Hellwig 已提交
7124
	struct iwl3945_priv *priv = hw->priv;
Z
Zhu Yi 已提交
7125
	int i, avail;
C
Christoph Hellwig 已提交
7126 7127
	struct iwl3945_tx_queue *txq;
	struct iwl3945_queue *q;
Z
Zhu Yi 已提交
7128 7129 7130 7131
	unsigned long flags;

	IWL_DEBUG_MAC80211("enter\n");

C
Christoph Hellwig 已提交
7132
	if (!iwl3945_is_ready_rf(priv)) {
Z
Zhu Yi 已提交
7133 7134 7135 7136 7137 7138 7139 7140 7141
		IWL_DEBUG_MAC80211("leave - RF not ready\n");
		return -EIO;
	}

	spin_lock_irqsave(&priv->lock, flags);

	for (i = 0; i < AC_NUM; i++) {
		txq = &priv->txq[i];
		q = &txq->q;
C
Christoph Hellwig 已提交
7142
		avail = iwl3945_queue_space(q);
Z
Zhu Yi 已提交
7143

7144 7145 7146
		stats[i].len = q->n_window - avail;
		stats[i].limit = q->n_window - q->high_mark;
		stats[i].count = q->n_window;
Z
Zhu Yi 已提交
7147 7148 7149 7150 7151 7152 7153 7154 7155

	}
	spin_unlock_irqrestore(&priv->lock, flags);

	IWL_DEBUG_MAC80211("leave\n");

	return 0;
}

C
Christoph Hellwig 已提交
7156
static int iwl3945_mac_get_stats(struct ieee80211_hw *hw,
Z
Zhu Yi 已提交
7157 7158 7159 7160 7161 7162 7163 7164
			     struct ieee80211_low_level_stats *stats)
{
	IWL_DEBUG_MAC80211("enter\n");
	IWL_DEBUG_MAC80211("leave\n");

	return 0;
}

C
Christoph Hellwig 已提交
7165
static u64 iwl3945_mac_get_tsf(struct ieee80211_hw *hw)
Z
Zhu Yi 已提交
7166 7167 7168 7169 7170 7171 7172
{
	IWL_DEBUG_MAC80211("enter\n");
	IWL_DEBUG_MAC80211("leave\n");

	return 0;
}

C
Christoph Hellwig 已提交
7173
static void iwl3945_mac_reset_tsf(struct ieee80211_hw *hw)
Z
Zhu Yi 已提交
7174
{
C
Christoph Hellwig 已提交
7175
	struct iwl3945_priv *priv = hw->priv;
Z
Zhu Yi 已提交
7176 7177 7178 7179 7180
	unsigned long flags;

	mutex_lock(&priv->mutex);
	IWL_DEBUG_MAC80211("enter\n");

C
Christoph Hellwig 已提交
7181
	iwl3945_reset_qos(priv);
7182

Z
Zhu Yi 已提交
7183 7184 7185 7186 7187 7188 7189 7190 7191 7192 7193 7194 7195 7196 7197 7198 7199 7200 7201 7202 7203
	cancel_delayed_work(&priv->post_associate);

	spin_lock_irqsave(&priv->lock, flags);
	priv->assoc_id = 0;
	priv->assoc_capability = 0;
	priv->call_post_assoc_from_beacon = 0;

	/* new association get rid of ibss beacon skb */
	if (priv->ibss_beacon)
		dev_kfree_skb(priv->ibss_beacon);

	priv->ibss_beacon = NULL;

	priv->beacon_int = priv->hw->conf.beacon_int;
	priv->timestamp1 = 0;
	priv->timestamp0 = 0;
	if ((priv->iw_mode == IEEE80211_IF_TYPE_STA))
		priv->beacon_int = 0;

	spin_unlock_irqrestore(&priv->lock, flags);

7204 7205 7206 7207 7208 7209
	if (!iwl3945_is_ready_rf(priv)) {
		IWL_DEBUG_MAC80211("leave - not ready\n");
		mutex_unlock(&priv->mutex);
		return;
	}

7210 7211 7212 7213
	/* we are restarting association process
	 * clear RXON_FILTER_ASSOC_MSK bit
	*/
	if (priv->iw_mode != IEEE80211_IF_TYPE_AP) {
C
Christoph Hellwig 已提交
7214
		iwl3945_scan_cancel_timeout(priv, 100);
7215
		priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
C
Christoph Hellwig 已提交
7216
		iwl3945_commit_rxon(priv);
7217 7218
	}

Z
Zhu Yi 已提交
7219 7220
	/* Per mac80211.h: This is only used in IBSS mode... */
	if (priv->iw_mode != IEEE80211_IF_TYPE_IBSS) {
7221

Z
Zhu Yi 已提交
7222 7223 7224 7225 7226
		IWL_DEBUG_MAC80211("leave - not in IBSS\n");
		mutex_unlock(&priv->mutex);
		return;
	}

C
Christoph Hellwig 已提交
7227
	iwl3945_set_rate(priv);
Z
Zhu Yi 已提交
7228 7229 7230 7231 7232 7233 7234

	mutex_unlock(&priv->mutex);

	IWL_DEBUG_MAC80211("leave\n");

}

7235
static int iwl3945_mac_beacon_update(struct ieee80211_hw *hw, struct sk_buff *skb)
Z
Zhu Yi 已提交
7236
{
C
Christoph Hellwig 已提交
7237
	struct iwl3945_priv *priv = hw->priv;
Z
Zhu Yi 已提交
7238 7239 7240 7241 7242
	unsigned long flags;

	mutex_lock(&priv->mutex);
	IWL_DEBUG_MAC80211("enter\n");

C
Christoph Hellwig 已提交
7243
	if (!iwl3945_is_ready_rf(priv)) {
Z
Zhu Yi 已提交
7244 7245 7246 7247 7248 7249 7250 7251 7252 7253 7254 7255 7256 7257 7258 7259 7260 7261 7262 7263 7264 7265 7266
		IWL_DEBUG_MAC80211("leave - RF not ready\n");
		mutex_unlock(&priv->mutex);
		return -EIO;
	}

	if (priv->iw_mode != IEEE80211_IF_TYPE_IBSS) {
		IWL_DEBUG_MAC80211("leave - not IBSS\n");
		mutex_unlock(&priv->mutex);
		return -EIO;
	}

	spin_lock_irqsave(&priv->lock, flags);

	if (priv->ibss_beacon)
		dev_kfree_skb(priv->ibss_beacon);

	priv->ibss_beacon = skb;

	priv->assoc_id = 0;

	IWL_DEBUG_MAC80211("leave\n");
	spin_unlock_irqrestore(&priv->lock, flags);

C
Christoph Hellwig 已提交
7267
	iwl3945_reset_qos(priv);
Z
Zhu Yi 已提交
7268 7269 7270 7271 7272 7273 7274 7275 7276 7277 7278 7279 7280 7281

	queue_work(priv->workqueue, &priv->post_associate.work);

	mutex_unlock(&priv->mutex);

	return 0;
}

/*****************************************************************************
 *
 * sysfs attributes
 *
 *****************************************************************************/

7282
#ifdef CONFIG_IWL3945_DEBUG
Z
Zhu Yi 已提交
7283 7284 7285 7286 7287 7288 7289 7290 7291 7292 7293

/*
 * The following adds a new attribute to the sysfs representation
 * of this device driver (i.e. a new file in /sys/bus/pci/drivers/iwl/)
 * used for controlling the debug level.
 *
 * See the level definitions in iwl for details.
 */

static ssize_t show_debug_level(struct device_driver *d, char *buf)
{
C
Christoph Hellwig 已提交
7294
	return sprintf(buf, "0x%08X\n", iwl3945_debug_level);
Z
Zhu Yi 已提交
7295 7296 7297 7298 7299 7300 7301 7302 7303 7304 7305 7306
}
static ssize_t store_debug_level(struct device_driver *d,
				 const char *buf, size_t count)
{
	char *p = (char *)buf;
	u32 val;

	val = simple_strtoul(p, &p, 0);
	if (p == buf)
		printk(KERN_INFO DRV_NAME
		       ": %s is not in hex or decimal form.\n", buf);
	else
C
Christoph Hellwig 已提交
7307
		iwl3945_debug_level = val;
Z
Zhu Yi 已提交
7308 7309 7310 7311 7312 7313 7314

	return strnlen(buf, count);
}

static DRIVER_ATTR(debug_level, S_IWUSR | S_IRUGO,
		   show_debug_level, store_debug_level);

7315
#endif /* CONFIG_IWL3945_DEBUG */
Z
Zhu Yi 已提交
7316 7317 7318 7319

static ssize_t show_temperature(struct device *d,
				struct device_attribute *attr, char *buf)
{
C
Christoph Hellwig 已提交
7320
	struct iwl3945_priv *priv = (struct iwl3945_priv *)d->driver_data;
Z
Zhu Yi 已提交
7321

C
Christoph Hellwig 已提交
7322
	if (!iwl3945_is_alive(priv))
Z
Zhu Yi 已提交
7323 7324
		return -EAGAIN;

C
Christoph Hellwig 已提交
7325
	return sprintf(buf, "%d\n", iwl3945_hw_get_temperature(priv));
Z
Zhu Yi 已提交
7326 7327 7328 7329 7330 7331 7332 7333
}

static DEVICE_ATTR(temperature, S_IRUGO, show_temperature, NULL);

static ssize_t show_rs_window(struct device *d,
			      struct device_attribute *attr,
			      char *buf)
{
C
Christoph Hellwig 已提交
7334 7335
	struct iwl3945_priv *priv = d->driver_data;
	return iwl3945_fill_rs_info(priv->hw, buf, IWL_AP_ID);
Z
Zhu Yi 已提交
7336 7337 7338 7339 7340 7341
}
static DEVICE_ATTR(rs_window, S_IRUGO, show_rs_window, NULL);

static ssize_t show_tx_power(struct device *d,
			     struct device_attribute *attr, char *buf)
{
C
Christoph Hellwig 已提交
7342
	struct iwl3945_priv *priv = (struct iwl3945_priv *)d->driver_data;
Z
Zhu Yi 已提交
7343 7344 7345 7346 7347 7348 7349
	return sprintf(buf, "%d\n", priv->user_txpower_limit);
}

static ssize_t store_tx_power(struct device *d,
			      struct device_attribute *attr,
			      const char *buf, size_t count)
{
C
Christoph Hellwig 已提交
7350
	struct iwl3945_priv *priv = (struct iwl3945_priv *)d->driver_data;
Z
Zhu Yi 已提交
7351 7352 7353 7354 7355 7356 7357 7358
	char *p = (char *)buf;
	u32 val;

	val = simple_strtoul(p, &p, 10);
	if (p == buf)
		printk(KERN_INFO DRV_NAME
		       ": %s is not in decimal form.\n", buf);
	else
C
Christoph Hellwig 已提交
7359
		iwl3945_hw_reg_set_txpower(priv, val);
Z
Zhu Yi 已提交
7360 7361 7362 7363 7364 7365 7366 7367 7368

	return count;
}

static DEVICE_ATTR(tx_power, S_IWUSR | S_IRUGO, show_tx_power, store_tx_power);

static ssize_t show_flags(struct device *d,
			  struct device_attribute *attr, char *buf)
{
C
Christoph Hellwig 已提交
7369
	struct iwl3945_priv *priv = (struct iwl3945_priv *)d->driver_data;
Z
Zhu Yi 已提交
7370 7371 7372 7373 7374 7375 7376 7377

	return sprintf(buf, "0x%04X\n", priv->active_rxon.flags);
}

static ssize_t store_flags(struct device *d,
			   struct device_attribute *attr,
			   const char *buf, size_t count)
{
C
Christoph Hellwig 已提交
7378
	struct iwl3945_priv *priv = (struct iwl3945_priv *)d->driver_data;
Z
Zhu Yi 已提交
7379 7380 7381 7382 7383
	u32 flags = simple_strtoul(buf, NULL, 0);

	mutex_lock(&priv->mutex);
	if (le32_to_cpu(priv->staging_rxon.flags) != flags) {
		/* Cancel any currently running scans... */
C
Christoph Hellwig 已提交
7384
		if (iwl3945_scan_cancel_timeout(priv, 100))
Z
Zhu Yi 已提交
7385 7386 7387 7388 7389
			IWL_WARNING("Could not cancel scan.\n");
		else {
			IWL_DEBUG_INFO("Committing rxon.flags = 0x%04X\n",
				       flags);
			priv->staging_rxon.flags = cpu_to_le32(flags);
C
Christoph Hellwig 已提交
7390
			iwl3945_commit_rxon(priv);
Z
Zhu Yi 已提交
7391 7392 7393 7394 7395 7396 7397 7398 7399 7400 7401 7402
		}
	}
	mutex_unlock(&priv->mutex);

	return count;
}

static DEVICE_ATTR(flags, S_IWUSR | S_IRUGO, show_flags, store_flags);

static ssize_t show_filter_flags(struct device *d,
				 struct device_attribute *attr, char *buf)
{
C
Christoph Hellwig 已提交
7403
	struct iwl3945_priv *priv = (struct iwl3945_priv *)d->driver_data;
Z
Zhu Yi 已提交
7404 7405 7406 7407 7408 7409 7410 7411 7412

	return sprintf(buf, "0x%04X\n",
		le32_to_cpu(priv->active_rxon.filter_flags));
}

static ssize_t store_filter_flags(struct device *d,
				  struct device_attribute *attr,
				  const char *buf, size_t count)
{
C
Christoph Hellwig 已提交
7413
	struct iwl3945_priv *priv = (struct iwl3945_priv *)d->driver_data;
Z
Zhu Yi 已提交
7414 7415 7416 7417 7418
	u32 filter_flags = simple_strtoul(buf, NULL, 0);

	mutex_lock(&priv->mutex);
	if (le32_to_cpu(priv->staging_rxon.filter_flags) != filter_flags) {
		/* Cancel any currently running scans... */
C
Christoph Hellwig 已提交
7419
		if (iwl3945_scan_cancel_timeout(priv, 100))
Z
Zhu Yi 已提交
7420 7421 7422 7423 7424 7425
			IWL_WARNING("Could not cancel scan.\n");
		else {
			IWL_DEBUG_INFO("Committing rxon.filter_flags = "
				       "0x%04X\n", filter_flags);
			priv->staging_rxon.filter_flags =
				cpu_to_le32(filter_flags);
C
Christoph Hellwig 已提交
7426
			iwl3945_commit_rxon(priv);
Z
Zhu Yi 已提交
7427 7428 7429 7430 7431 7432 7433 7434 7435 7436
		}
	}
	mutex_unlock(&priv->mutex);

	return count;
}

static DEVICE_ATTR(filter_flags, S_IWUSR | S_IRUGO, show_filter_flags,
		   store_filter_flags);

7437
#ifdef CONFIG_IWL3945_SPECTRUM_MEASUREMENT
Z
Zhu Yi 已提交
7438 7439 7440 7441

static ssize_t show_measurement(struct device *d,
				struct device_attribute *attr, char *buf)
{
C
Christoph Hellwig 已提交
7442 7443
	struct iwl3945_priv *priv = dev_get_drvdata(d);
	struct iwl3945_spectrum_notification measure_report;
Z
Zhu Yi 已提交
7444
	u32 size = sizeof(measure_report), len = 0, ofs = 0;
7445
	u8 *data = (u8 *)&measure_report;
Z
Zhu Yi 已提交
7446 7447 7448 7449 7450 7451 7452 7453 7454 7455 7456 7457 7458 7459 7460 7461 7462 7463 7464 7465 7466 7467 7468 7469 7470 7471 7472 7473 7474
	unsigned long flags;

	spin_lock_irqsave(&priv->lock, flags);
	if (!(priv->measurement_status & MEASUREMENT_READY)) {
		spin_unlock_irqrestore(&priv->lock, flags);
		return 0;
	}
	memcpy(&measure_report, &priv->measure_report, size);
	priv->measurement_status = 0;
	spin_unlock_irqrestore(&priv->lock, flags);

	while (size && (PAGE_SIZE - len)) {
		hex_dump_to_buffer(data + ofs, size, 16, 1, buf + len,
				   PAGE_SIZE - len, 1);
		len = strlen(buf);
		if (PAGE_SIZE - len)
			buf[len++] = '\n';

		ofs += 16;
		size -= min(size, 16U);
	}

	return len;
}

static ssize_t store_measurement(struct device *d,
				 struct device_attribute *attr,
				 const char *buf, size_t count)
{
C
Christoph Hellwig 已提交
7475
	struct iwl3945_priv *priv = dev_get_drvdata(d);
Z
Zhu Yi 已提交
7476 7477 7478 7479 7480 7481 7482 7483 7484 7485 7486 7487 7488 7489 7490 7491 7492 7493 7494 7495 7496 7497 7498 7499 7500
	struct ieee80211_measurement_params params = {
		.channel = le16_to_cpu(priv->active_rxon.channel),
		.start_time = cpu_to_le64(priv->last_tsf),
		.duration = cpu_to_le16(1),
	};
	u8 type = IWL_MEASURE_BASIC;
	u8 buffer[32];
	u8 channel;

	if (count) {
		char *p = buffer;
		strncpy(buffer, buf, min(sizeof(buffer), count));
		channel = simple_strtoul(p, NULL, 0);
		if (channel)
			params.channel = channel;

		p = buffer;
		while (*p && *p != ' ')
			p++;
		if (*p)
			type = simple_strtoul(p + 1, NULL, 0);
	}

	IWL_DEBUG_INFO("Invoking measurement of type %d on "
		       "channel %d (for '%s')\n", type, params.channel, buf);
C
Christoph Hellwig 已提交
7501
	iwl3945_get_measurement(priv, &params, type);
Z
Zhu Yi 已提交
7502 7503 7504 7505 7506 7507

	return count;
}

static DEVICE_ATTR(measurement, S_IRUSR | S_IWUSR,
		   show_measurement, store_measurement);
7508
#endif /* CONFIG_IWL3945_SPECTRUM_MEASUREMENT */
Z
Zhu Yi 已提交
7509 7510 7511 7512 7513

static ssize_t store_retry_rate(struct device *d,
				struct device_attribute *attr,
				const char *buf, size_t count)
{
C
Christoph Hellwig 已提交
7514
	struct iwl3945_priv *priv = dev_get_drvdata(d);
Z
Zhu Yi 已提交
7515 7516 7517 7518 7519 7520 7521 7522 7523 7524 7525

	priv->retry_rate = simple_strtoul(buf, NULL, 0);
	if (priv->retry_rate <= 0)
		priv->retry_rate = 1;

	return count;
}

static ssize_t show_retry_rate(struct device *d,
			       struct device_attribute *attr, char *buf)
{
C
Christoph Hellwig 已提交
7526
	struct iwl3945_priv *priv = dev_get_drvdata(d);
Z
Zhu Yi 已提交
7527 7528 7529 7530 7531 7532 7533 7534 7535 7536
	return sprintf(buf, "%d", priv->retry_rate);
}

static DEVICE_ATTR(retry_rate, S_IWUSR | S_IRUSR, show_retry_rate,
		   store_retry_rate);

static ssize_t store_power_level(struct device *d,
				 struct device_attribute *attr,
				 const char *buf, size_t count)
{
C
Christoph Hellwig 已提交
7537
	struct iwl3945_priv *priv = dev_get_drvdata(d);
Z
Zhu Yi 已提交
7538 7539 7540 7541 7542 7543
	int rc;
	int mode;

	mode = simple_strtoul(buf, NULL, 0);
	mutex_lock(&priv->mutex);

C
Christoph Hellwig 已提交
7544
	if (!iwl3945_is_ready(priv)) {
Z
Zhu Yi 已提交
7545 7546 7547 7548 7549 7550 7551 7552 7553 7554
		rc = -EAGAIN;
		goto out;
	}

	if ((mode < 1) || (mode > IWL_POWER_LIMIT) || (mode == IWL_POWER_AC))
		mode = IWL_POWER_AC;
	else
		mode |= IWL_POWER_ENABLED;

	if (mode != priv->power_mode) {
C
Christoph Hellwig 已提交
7555
		rc = iwl3945_send_power_mode(priv, IWL_POWER_LEVEL(mode));
Z
Zhu Yi 已提交
7556 7557 7558 7559 7560 7561 7562 7563 7564 7565 7566 7567 7568 7569 7570 7571 7572 7573 7574 7575 7576 7577 7578 7579 7580 7581 7582 7583 7584 7585 7586 7587 7588 7589 7590
		if (rc) {
			IWL_DEBUG_MAC80211("failed setting power mode.\n");
			goto out;
		}
		priv->power_mode = mode;
	}

	rc = count;

 out:
	mutex_unlock(&priv->mutex);
	return rc;
}

#define MAX_WX_STRING 80

/* Values are in microsecond */
static const s32 timeout_duration[] = {
	350000,
	250000,
	75000,
	37000,
	25000,
};
static const s32 period_duration[] = {
	400000,
	700000,
	1000000,
	1000000,
	1000000
};

static ssize_t show_power_level(struct device *d,
				struct device_attribute *attr, char *buf)
{
C
Christoph Hellwig 已提交
7591
	struct iwl3945_priv *priv = dev_get_drvdata(d);
Z
Zhu Yi 已提交
7592 7593 7594 7595 7596 7597 7598 7599 7600 7601 7602 7603 7604 7605 7606 7607 7608 7609 7610 7611 7612 7613 7614 7615
	int level = IWL_POWER_LEVEL(priv->power_mode);
	char *p = buf;

	p += sprintf(p, "%d ", level);
	switch (level) {
	case IWL_POWER_MODE_CAM:
	case IWL_POWER_AC:
		p += sprintf(p, "(AC)");
		break;
	case IWL_POWER_BATTERY:
		p += sprintf(p, "(BATTERY)");
		break;
	default:
		p += sprintf(p,
			     "(Timeout %dms, Period %dms)",
			     timeout_duration[level - 1] / 1000,
			     period_duration[level - 1] / 1000);
	}

	if (!(priv->power_mode & IWL_POWER_ENABLED))
		p += sprintf(p, " OFF\n");
	else
		p += sprintf(p, " \n");

7616
	return p - buf + 1;
Z
Zhu Yi 已提交
7617 7618 7619 7620 7621 7622 7623 7624 7625

}

static DEVICE_ATTR(power_level, S_IWUSR | S_IRUSR, show_power_level,
		   store_power_level);

static ssize_t show_channels(struct device *d,
			     struct device_attribute *attr, char *buf)
{
7626 7627
	/* all this shit doesn't belong into sysfs anyway */
	return 0;
Z
Zhu Yi 已提交
7628 7629 7630 7631 7632 7633 7634
}

static DEVICE_ATTR(channels, S_IRUSR, show_channels, NULL);

static ssize_t show_statistics(struct device *d,
			       struct device_attribute *attr, char *buf)
{
C
Christoph Hellwig 已提交
7635 7636
	struct iwl3945_priv *priv = dev_get_drvdata(d);
	u32 size = sizeof(struct iwl3945_notif_statistics);
Z
Zhu Yi 已提交
7637
	u32 len = 0, ofs = 0;
7638
	u8 *data = (u8 *)&priv->statistics;
Z
Zhu Yi 已提交
7639 7640
	int rc = 0;

C
Christoph Hellwig 已提交
7641
	if (!iwl3945_is_alive(priv))
Z
Zhu Yi 已提交
7642 7643 7644
		return -EAGAIN;

	mutex_lock(&priv->mutex);
C
Christoph Hellwig 已提交
7645
	rc = iwl3945_send_statistics_request(priv);
Z
Zhu Yi 已提交
7646 7647 7648 7649 7650 7651 7652 7653 7654 7655 7656 7657 7658 7659 7660 7661 7662 7663 7664 7665 7666 7667 7668 7669 7670 7671 7672
	mutex_unlock(&priv->mutex);

	if (rc) {
		len = sprintf(buf,
			      "Error sending statistics request: 0x%08X\n", rc);
		return len;
	}

	while (size && (PAGE_SIZE - len)) {
		hex_dump_to_buffer(data + ofs, size, 16, 1, buf + len,
				   PAGE_SIZE - len, 1);
		len = strlen(buf);
		if (PAGE_SIZE - len)
			buf[len++] = '\n';

		ofs += 16;
		size -= min(size, 16U);
	}

	return len;
}

static DEVICE_ATTR(statistics, S_IRUGO, show_statistics, NULL);

static ssize_t show_antenna(struct device *d,
			    struct device_attribute *attr, char *buf)
{
C
Christoph Hellwig 已提交
7673
	struct iwl3945_priv *priv = dev_get_drvdata(d);
Z
Zhu Yi 已提交
7674

C
Christoph Hellwig 已提交
7675
	if (!iwl3945_is_alive(priv))
Z
Zhu Yi 已提交
7676 7677 7678 7679 7680 7681 7682 7683 7684 7685
		return -EAGAIN;

	return sprintf(buf, "%d\n", priv->antenna);
}

static ssize_t store_antenna(struct device *d,
			     struct device_attribute *attr,
			     const char *buf, size_t count)
{
	int ant;
C
Christoph Hellwig 已提交
7686
	struct iwl3945_priv *priv = dev_get_drvdata(d);
Z
Zhu Yi 已提交
7687 7688 7689 7690 7691 7692 7693 7694 7695 7696 7697

	if (count == 0)
		return 0;

	if (sscanf(buf, "%1i", &ant) != 1) {
		IWL_DEBUG_INFO("not in hex or decimal form.\n");
		return count;
	}

	if ((ant >= 0) && (ant <= 2)) {
		IWL_DEBUG_INFO("Setting antenna select to %d.\n", ant);
C
Christoph Hellwig 已提交
7698
		priv->antenna = (enum iwl3945_antenna)ant;
Z
Zhu Yi 已提交
7699 7700 7701 7702 7703 7704 7705 7706 7707 7708 7709 7710
	} else
		IWL_DEBUG_INFO("Bad antenna select value %d.\n", ant);


	return count;
}

static DEVICE_ATTR(antenna, S_IWUSR | S_IRUGO, show_antenna, store_antenna);

static ssize_t show_status(struct device *d,
			   struct device_attribute *attr, char *buf)
{
C
Christoph Hellwig 已提交
7711 7712
	struct iwl3945_priv *priv = (struct iwl3945_priv *)d->driver_data;
	if (!iwl3945_is_alive(priv))
Z
Zhu Yi 已提交
7713 7714 7715 7716 7717 7718 7719 7720 7721 7722 7723 7724 7725
		return -EAGAIN;
	return sprintf(buf, "0x%08x\n", (int)priv->status);
}

static DEVICE_ATTR(status, S_IRUGO, show_status, NULL);

static ssize_t dump_error_log(struct device *d,
			      struct device_attribute *attr,
			      const char *buf, size_t count)
{
	char *p = (char *)buf;

	if (p[0] == '1')
C
Christoph Hellwig 已提交
7726
		iwl3945_dump_nic_error_log((struct iwl3945_priv *)d->driver_data);
Z
Zhu Yi 已提交
7727 7728 7729 7730 7731 7732 7733 7734 7735 7736 7737 7738 7739

	return strnlen(buf, count);
}

static DEVICE_ATTR(dump_errors, S_IWUSR, NULL, dump_error_log);

static ssize_t dump_event_log(struct device *d,
			      struct device_attribute *attr,
			      const char *buf, size_t count)
{
	char *p = (char *)buf;

	if (p[0] == '1')
C
Christoph Hellwig 已提交
7740
		iwl3945_dump_nic_event_log((struct iwl3945_priv *)d->driver_data);
Z
Zhu Yi 已提交
7741 7742 7743 7744 7745 7746 7747 7748 7749 7750 7751 7752

	return strnlen(buf, count);
}

static DEVICE_ATTR(dump_events, S_IWUSR, NULL, dump_event_log);

/*****************************************************************************
 *
 * driver setup and teardown
 *
 *****************************************************************************/

C
Christoph Hellwig 已提交
7753
static void iwl3945_setup_deferred_work(struct iwl3945_priv *priv)
Z
Zhu Yi 已提交
7754 7755 7756 7757 7758
{
	priv->workqueue = create_workqueue(DRV_NAME);

	init_waitqueue_head(&priv->wait_command_queue);

C
Christoph Hellwig 已提交
7759 7760 7761 7762 7763 7764 7765 7766
	INIT_WORK(&priv->up, iwl3945_bg_up);
	INIT_WORK(&priv->restart, iwl3945_bg_restart);
	INIT_WORK(&priv->rx_replenish, iwl3945_bg_rx_replenish);
	INIT_WORK(&priv->scan_completed, iwl3945_bg_scan_completed);
	INIT_WORK(&priv->request_scan, iwl3945_bg_request_scan);
	INIT_WORK(&priv->abort_scan, iwl3945_bg_abort_scan);
	INIT_WORK(&priv->rf_kill, iwl3945_bg_rf_kill);
	INIT_WORK(&priv->beacon_update, iwl3945_bg_beacon_update);
7767
	INIT_WORK(&priv->set_monitor, iwl3945_bg_set_monitor);
C
Christoph Hellwig 已提交
7768 7769 7770 7771 7772 7773
	INIT_DELAYED_WORK(&priv->post_associate, iwl3945_bg_post_associate);
	INIT_DELAYED_WORK(&priv->init_alive_start, iwl3945_bg_init_alive_start);
	INIT_DELAYED_WORK(&priv->alive_start, iwl3945_bg_alive_start);
	INIT_DELAYED_WORK(&priv->scan_check, iwl3945_bg_scan_check);

	iwl3945_hw_setup_deferred_work(priv);
Z
Zhu Yi 已提交
7774 7775

	tasklet_init(&priv->irq_tasklet, (void (*)(unsigned long))
C
Christoph Hellwig 已提交
7776
		     iwl3945_irq_tasklet, (unsigned long)priv);
Z
Zhu Yi 已提交
7777 7778
}

C
Christoph Hellwig 已提交
7779
static void iwl3945_cancel_deferred_work(struct iwl3945_priv *priv)
Z
Zhu Yi 已提交
7780
{
C
Christoph Hellwig 已提交
7781
	iwl3945_hw_cancel_deferred_work(priv);
Z
Zhu Yi 已提交
7782

7783
	cancel_delayed_work_sync(&priv->init_alive_start);
Z
Zhu Yi 已提交
7784 7785 7786 7787 7788 7789
	cancel_delayed_work(&priv->scan_check);
	cancel_delayed_work(&priv->alive_start);
	cancel_delayed_work(&priv->post_associate);
	cancel_work_sync(&priv->beacon_update);
}

C
Christoph Hellwig 已提交
7790
static struct attribute *iwl3945_sysfs_entries[] = {
Z
Zhu Yi 已提交
7791 7792 7793 7794 7795 7796
	&dev_attr_antenna.attr,
	&dev_attr_channels.attr,
	&dev_attr_dump_errors.attr,
	&dev_attr_dump_events.attr,
	&dev_attr_flags.attr,
	&dev_attr_filter_flags.attr,
7797
#ifdef CONFIG_IWL3945_SPECTRUM_MEASUREMENT
Z
Zhu Yi 已提交
7798 7799 7800 7801 7802 7803 7804 7805 7806 7807 7808 7809 7810
	&dev_attr_measurement.attr,
#endif
	&dev_attr_power_level.attr,
	&dev_attr_retry_rate.attr,
	&dev_attr_rs_window.attr,
	&dev_attr_statistics.attr,
	&dev_attr_status.attr,
	&dev_attr_temperature.attr,
	&dev_attr_tx_power.attr,

	NULL
};

C
Christoph Hellwig 已提交
7811
static struct attribute_group iwl3945_attribute_group = {
Z
Zhu Yi 已提交
7812
	.name = NULL,		/* put in device directory */
C
Christoph Hellwig 已提交
7813
	.attrs = iwl3945_sysfs_entries,
Z
Zhu Yi 已提交
7814 7815
};

C
Christoph Hellwig 已提交
7816 7817 7818 7819 7820 7821 7822 7823 7824 7825 7826 7827 7828 7829 7830 7831
static struct ieee80211_ops iwl3945_hw_ops = {
	.tx = iwl3945_mac_tx,
	.start = iwl3945_mac_start,
	.stop = iwl3945_mac_stop,
	.add_interface = iwl3945_mac_add_interface,
	.remove_interface = iwl3945_mac_remove_interface,
	.config = iwl3945_mac_config,
	.config_interface = iwl3945_mac_config_interface,
	.configure_filter = iwl3945_configure_filter,
	.set_key = iwl3945_mac_set_key,
	.get_stats = iwl3945_mac_get_stats,
	.get_tx_stats = iwl3945_mac_get_tx_stats,
	.conf_tx = iwl3945_mac_conf_tx,
	.get_tsf = iwl3945_mac_get_tsf,
	.reset_tsf = iwl3945_mac_reset_tsf,
	.hw_scan = iwl3945_mac_hw_scan
Z
Zhu Yi 已提交
7832 7833
};

C
Christoph Hellwig 已提交
7834
static int iwl3945_pci_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
Z
Zhu Yi 已提交
7835 7836
{
	int err = 0;
C
Christoph Hellwig 已提交
7837
	struct iwl3945_priv *priv;
Z
Zhu Yi 已提交
7838
	struct ieee80211_hw *hw;
T
Tomas Winkler 已提交
7839
	struct iwl_3945_cfg *cfg = (struct iwl_3945_cfg *)(ent->driver_data);
7840
	unsigned long flags;
7841
	DECLARE_MAC_BUF(mac);
Z
Zhu Yi 已提交
7842

7843 7844
	/* Disabling hardware scan means that mac80211 will perform scans
	 * "the hard way", rather than using device's scan. */
C
Christoph Hellwig 已提交
7845
	if (iwl3945_param_disable_hw_scan) {
Z
Zhu Yi 已提交
7846
		IWL_DEBUG_INFO("Disabling hw_scan\n");
C
Christoph Hellwig 已提交
7847
		iwl3945_hw_ops.hw_scan = NULL;
Z
Zhu Yi 已提交
7848 7849
	}

7850
	if ((iwl3945_param_queues_num > IWL39_MAX_NUM_QUEUES) ||
C
Christoph Hellwig 已提交
7851
	    (iwl3945_param_queues_num < IWL_MIN_NUM_QUEUES)) {
Z
Zhu Yi 已提交
7852
		IWL_ERROR("invalid queues_num, should be between %d and %d\n",
7853
			  IWL_MIN_NUM_QUEUES, IWL39_MAX_NUM_QUEUES);
Z
Zhu Yi 已提交
7854 7855 7856 7857 7858 7859
		err = -EINVAL;
		goto out;
	}

	/* mac80211 allocates memory for this device instance, including
	 *   space for this driver's private structure */
C
Christoph Hellwig 已提交
7860
	hw = ieee80211_alloc_hw(sizeof(struct iwl3945_priv), &iwl3945_hw_ops);
Z
Zhu Yi 已提交
7861 7862 7863 7864 7865 7866 7867
	if (hw == NULL) {
		IWL_ERROR("Can not allocate network device\n");
		err = -ENOMEM;
		goto out;
	}
	SET_IEEE80211_DEV(hw, &pdev->dev);

7868 7869
	hw->rate_control_algorithm = "iwl-3945-rs";

Z
Zhu Yi 已提交
7870 7871 7872 7873 7874
	IWL_DEBUG_INFO("*** LOAD DRIVER ***\n");
	priv = hw->priv;
	priv->hw = hw;

	priv->pci_dev = pdev;
T
Tomas Winkler 已提交
7875
	priv->cfg = cfg;
7876 7877

	/* Select antenna (may be helpful if only one antenna is connected) */
C
Christoph Hellwig 已提交
7878
	priv->antenna = (enum iwl3945_antenna)iwl3945_param_antenna;
7879
#ifdef CONFIG_IWL3945_DEBUG
C
Christoph Hellwig 已提交
7880
	iwl3945_debug_level = iwl3945_param_debug;
Z
Zhu Yi 已提交
7881 7882 7883 7884 7885 7886
	atomic_set(&priv->restrict_refcnt, 0);
#endif
	priv->retry_rate = 1;

	priv->ibss_beacon = NULL;

7887
	/* Tell mac80211 our characteristics */
7888
	hw->flags = IEEE80211_HW_SIGNAL_DBM |
7889
		    IEEE80211_HW_NOISE_DBM;
Z
Zhu Yi 已提交
7890

7891
	/* 4 EDCA QOS priorities */
Z
Zhu Yi 已提交
7892 7893 7894 7895 7896 7897 7898 7899 7900 7901 7902 7903 7904 7905 7906 7907 7908
	hw->queues = 4;

	spin_lock_init(&priv->lock);
	spin_lock_init(&priv->power_data.lock);
	spin_lock_init(&priv->sta_lock);
	spin_lock_init(&priv->hcmd_lock);

	INIT_LIST_HEAD(&priv->free_frames);

	mutex_init(&priv->mutex);
	if (pci_enable_device(pdev)) {
		err = -ENODEV;
		goto out_ieee80211_free_hw;
	}

	pci_set_master(pdev);

7909
	/* Clear the driver's (not device's) station table */
C
Christoph Hellwig 已提交
7910
	iwl3945_clear_stations_table(priv);
Z
Zhu Yi 已提交
7911 7912 7913 7914

	priv->data_retry_limit = -1;
	priv->ieee_channels = NULL;
	priv->ieee_rates = NULL;
7915
	priv->band = IEEE80211_BAND_2GHZ;
Z
Zhu Yi 已提交
7916 7917 7918 7919 7920 7921 7922 7923 7924 7925 7926 7927 7928

	err = pci_set_dma_mask(pdev, DMA_32BIT_MASK);
	if (!err)
		err = pci_set_consistent_dma_mask(pdev, DMA_32BIT_MASK);
	if (err) {
		printk(KERN_WARNING DRV_NAME ": No suitable DMA available.\n");
		goto out_pci_disable_device;
	}

	pci_set_drvdata(pdev, priv);
	err = pci_request_regions(pdev, DRV_NAME);
	if (err)
		goto out_pci_disable_device;
7929

Z
Zhu Yi 已提交
7930 7931 7932
	/* We disable the RETRY_TIMEOUT register (0x41) to keep
	 * PCI Tx retries from interfering with C3 CPU state */
	pci_write_config_byte(pdev, 0x41, 0x00);
7933

Z
Zhu Yi 已提交
7934 7935 7936 7937 7938 7939 7940 7941 7942 7943 7944 7945
	priv->hw_base = pci_iomap(pdev, 0, 0);
	if (!priv->hw_base) {
		err = -ENODEV;
		goto out_pci_release_regions;
	}

	IWL_DEBUG_INFO("pci_resource_len = 0x%08llx\n",
			(unsigned long long) pci_resource_len(pdev, 0));
	IWL_DEBUG_INFO("pci_resource_base = %p\n", priv->hw_base);

	/* Initialize module parameter values here */

7946
	/* Disable radio (SW RF KILL) via parameter when loading driver */
C
Christoph Hellwig 已提交
7947
	if (iwl3945_param_disable) {
Z
Zhu Yi 已提交
7948 7949 7950 7951 7952 7953 7954
		set_bit(STATUS_RF_KILL_SW, &priv->status);
		IWL_DEBUG_INFO("Radio disabled.\n");
	}

	priv->iw_mode = IEEE80211_IF_TYPE_STA;

	printk(KERN_INFO DRV_NAME
T
Tomas Winkler 已提交
7955
		": Detected Intel Wireless WiFi Link %s\n", priv->cfg->name);
Z
Zhu Yi 已提交
7956 7957

	/* Device-specific setup */
C
Christoph Hellwig 已提交
7958
	if (iwl3945_hw_set_hw_setting(priv)) {
Z
Zhu Yi 已提交
7959 7960 7961 7962
		IWL_ERROR("failed to set hw settings\n");
		goto out_iounmap;
	}

C
Christoph Hellwig 已提交
7963
	if (iwl3945_param_qos_enable)
Z
Zhu Yi 已提交
7964 7965
		priv->qos_data.qos_enable = 1;

C
Christoph Hellwig 已提交
7966
	iwl3945_reset_qos(priv);
Z
Zhu Yi 已提交
7967 7968 7969 7970

	priv->qos_data.qos_active = 0;
	priv->qos_data.qos_cap.val = 0;

7971
	iwl3945_set_rxon_channel(priv, IEEE80211_BAND_2GHZ, 6);
C
Christoph Hellwig 已提交
7972 7973
	iwl3945_setup_deferred_work(priv);
	iwl3945_setup_rx_handlers(priv);
Z
Zhu Yi 已提交
7974 7975 7976 7977 7978 7979

	priv->rates_mask = IWL_RATES_MASK;
	/* If power management is turned on, default to AC mode */
	priv->power_mode = IWL_POWER_AC;
	priv->user_txpower_limit = IWL_DEFAULT_TX_POWER;

7980
	spin_lock_irqsave(&priv->lock, flags);
C
Christoph Hellwig 已提交
7981
	iwl3945_disable_interrupts(priv);
7982
	spin_unlock_irqrestore(&priv->lock, flags);
7983

C
Christoph Hellwig 已提交
7984
	err = sysfs_create_group(&pdev->dev.kobj, &iwl3945_attribute_group);
Z
Zhu Yi 已提交
7985 7986 7987 7988 7989
	if (err) {
		IWL_ERROR("failed to create sysfs device attributes\n");
		goto out_release_irq;
	}

7990 7991
	/* nic init */
	iwl3945_set_bit(priv, CSR_GIO_CHICKEN_BITS,
7992 7993 7994 7995 7996 7997 7998 7999
			CSR_GIO_CHICKEN_BITS_REG_BIT_DIS_L0S_EXIT_TIMER);

	iwl3945_set_bit(priv, CSR_GP_CNTRL, CSR_GP_CNTRL_REG_FLAG_INIT_DONE);
	err = iwl3945_poll_bit(priv, CSR_GP_CNTRL,
			       CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY,
			       CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY, 25000);
	if (err < 0) {
		IWL_DEBUG_INFO("Failed to init the card\n");
8000
		goto out_remove_sysfs;
8001
	}
8002 8003
	/* Read the EEPROM */
	err = iwl3945_eeprom_init(priv);
Z
Zhu Yi 已提交
8004
	if (err) {
8005 8006
		IWL_ERROR("Unable to init EEPROM\n");
		goto out_remove_sysfs;
Z
Zhu Yi 已提交
8007
	}
8008 8009 8010 8011
	/* MAC Address location in EEPROM same for 3945/4965 */
	get_eeprom_mac(priv, priv->mac_addr);
	IWL_DEBUG_INFO("MAC address: %s\n", print_mac(mac, priv->mac_addr));
	SET_IEEE80211_PERM_ADDR(priv->hw, priv->mac_addr);
Z
Zhu Yi 已提交
8012

8013 8014 8015 8016 8017 8018 8019 8020 8021 8022 8023 8024
	err = iwl3945_init_channel_map(priv);
	if (err) {
		IWL_ERROR("initializing regulatory failed: %d\n", err);
		goto out_remove_sysfs;
	}

	err = iwl3945_init_geos(priv);
	if (err) {
		IWL_ERROR("initializing geos failed: %d\n", err);
		goto out_free_channel_map;
	}

8025 8026 8027
	err = ieee80211_register_hw(priv->hw);
	if (err) {
		IWL_ERROR("Failed to register network device (error %d)\n", err);
8028
		goto out_free_geos;
8029
	}
Z
Zhu Yi 已提交
8030

8031 8032 8033 8034
	priv->hw->conf.beacon_int = 100;
	priv->mac80211_registered = 1;
	pci_save_state(pdev);
	pci_disable_device(pdev);
Z
Zhu Yi 已提交
8035

8036 8037 8038 8039 8040
	err = iwl3945_rfkill_init(priv);
	if (err)
		IWL_ERROR("Unable to initialize RFKILL system. "
				  "Ignoring error: %d\n", err);

Z
Zhu Yi 已提交
8041 8042
	return 0;

8043 8044 8045 8046
 out_free_geos:
	iwl3945_free_geos(priv);
 out_free_channel_map:
	iwl3945_free_channel_map(priv);
8047
 out_remove_sysfs:
C
Christoph Hellwig 已提交
8048
	sysfs_remove_group(&pdev->dev.kobj, &iwl3945_attribute_group);
Z
Zhu Yi 已提交
8049 8050 8051 8052

 out_release_irq:
	destroy_workqueue(priv->workqueue);
	priv->workqueue = NULL;
C
Christoph Hellwig 已提交
8053
	iwl3945_unset_hw_setting(priv);
Z
Zhu Yi 已提交
8054 8055 8056 8057 8058 8059 8060 8061 8062 8063 8064 8065 8066 8067

 out_iounmap:
	pci_iounmap(pdev, priv->hw_base);
 out_pci_release_regions:
	pci_release_regions(pdev);
 out_pci_disable_device:
	pci_disable_device(pdev);
	pci_set_drvdata(pdev, NULL);
 out_ieee80211_free_hw:
	ieee80211_free_hw(priv->hw);
 out:
	return err;
}

8068
static void __devexit iwl3945_pci_remove(struct pci_dev *pdev)
Z
Zhu Yi 已提交
8069
{
C
Christoph Hellwig 已提交
8070
	struct iwl3945_priv *priv = pci_get_drvdata(pdev);
8071
	unsigned long flags;
Z
Zhu Yi 已提交
8072 8073 8074 8075 8076 8077 8078

	if (!priv)
		return;

	IWL_DEBUG_INFO("*** UNLOAD DRIVER ***\n");

	set_bit(STATUS_EXIT_PENDING, &priv->status);
8079

C
Christoph Hellwig 已提交
8080
	iwl3945_down(priv);
Z
Zhu Yi 已提交
8081

8082 8083 8084 8085 8086 8087 8088 8089 8090
	/* make sure we flush any pending irq or
	 * tasklet for the driver
	 */
	spin_lock_irqsave(&priv->lock, flags);
	iwl3945_disable_interrupts(priv);
	spin_unlock_irqrestore(&priv->lock, flags);

	iwl_synchronize_irq(priv);

C
Christoph Hellwig 已提交
8091
	sysfs_remove_group(&pdev->dev.kobj, &iwl3945_attribute_group);
Z
Zhu Yi 已提交
8092

8093
	iwl3945_rfkill_unregister(priv);
C
Christoph Hellwig 已提交
8094
	iwl3945_dealloc_ucode_pci(priv);
Z
Zhu Yi 已提交
8095 8096

	if (priv->rxq.bd)
C
Christoph Hellwig 已提交
8097 8098
		iwl3945_rx_queue_free(priv, &priv->rxq);
	iwl3945_hw_txq_ctx_free(priv);
Z
Zhu Yi 已提交
8099

C
Christoph Hellwig 已提交
8100 8101
	iwl3945_unset_hw_setting(priv);
	iwl3945_clear_stations_table(priv);
Z
Zhu Yi 已提交
8102

8103
	if (priv->mac80211_registered)
Z
Zhu Yi 已提交
8104 8105
		ieee80211_unregister_hw(priv->hw);

8106 8107 8108
	/*netif_stop_queue(dev); */
	flush_workqueue(priv->workqueue);

C
Christoph Hellwig 已提交
8109
	/* ieee80211_unregister_hw calls iwl3945_mac_stop, which flushes
Z
Zhu Yi 已提交
8110 8111 8112 8113 8114 8115 8116 8117 8118 8119
	 * priv->workqueue... so we can't take down the workqueue
	 * until now... */
	destroy_workqueue(priv->workqueue);
	priv->workqueue = NULL;

	pci_iounmap(pdev, priv->hw_base);
	pci_release_regions(pdev);
	pci_disable_device(pdev);
	pci_set_drvdata(pdev, NULL);

8120 8121
	iwl3945_free_channel_map(priv);
	iwl3945_free_geos(priv);
8122
	kfree(priv->scan);
Z
Zhu Yi 已提交
8123 8124 8125 8126 8127 8128 8129 8130
	if (priv->ibss_beacon)
		dev_kfree_skb(priv->ibss_beacon);

	ieee80211_free_hw(priv->hw);
}

#ifdef CONFIG_PM

C
Christoph Hellwig 已提交
8131
static int iwl3945_pci_suspend(struct pci_dev *pdev, pm_message_t state)
Z
Zhu Yi 已提交
8132
{
C
Christoph Hellwig 已提交
8133
	struct iwl3945_priv *priv = pci_get_drvdata(pdev);
Z
Zhu Yi 已提交
8134

8135 8136 8137 8138 8139
	if (priv->is_open) {
		set_bit(STATUS_IN_SUSPEND, &priv->status);
		iwl3945_mac_stop(priv->hw);
		priv->is_open = 1;
	}
Z
Zhu Yi 已提交
8140 8141 8142 8143 8144 8145

	pci_set_power_state(pdev, PCI_D3hot);

	return 0;
}

C
Christoph Hellwig 已提交
8146
static int iwl3945_pci_resume(struct pci_dev *pdev)
Z
Zhu Yi 已提交
8147
{
C
Christoph Hellwig 已提交
8148
	struct iwl3945_priv *priv = pci_get_drvdata(pdev);
Z
Zhu Yi 已提交
8149 8150 8151

	pci_set_power_state(pdev, PCI_D0);

8152 8153
	if (priv->is_open)
		iwl3945_mac_start(priv->hw);
Z
Zhu Yi 已提交
8154

8155
	clear_bit(STATUS_IN_SUSPEND, &priv->status);
Z
Zhu Yi 已提交
8156 8157 8158 8159 8160
	return 0;
}

#endif /* CONFIG_PM */

8161
/*************** RFKILL FUNCTIONS **********/
8162
#ifdef CONFIG_IWL3945_RFKILL
8163 8164 8165 8166 8167 8168
/* software rf-kill from user */
static int iwl3945_rfkill_soft_rf_kill(void *data, enum rfkill_state state)
{
	struct iwl3945_priv *priv = data;
	int err = 0;

8169
	if (!priv->rfkill)
8170 8171 8172 8173 8174 8175 8176 8177 8178
	return 0;

	if (test_bit(STATUS_EXIT_PENDING, &priv->status))
		return 0;

	IWL_DEBUG_RF_KILL("we recieved soft RFKILL set to state %d\n", state);
	mutex_lock(&priv->mutex);

	switch (state) {
8179
	case RFKILL_STATE_UNBLOCKED:
8180
		if (iwl3945_is_rfkill_hw(priv)) {
8181
			err = -EBUSY;
8182 8183 8184
			goto out_unlock;
		}
		iwl3945_radio_kill_sw(priv, 0);
8185
		break;
8186
	case RFKILL_STATE_SOFT_BLOCKED:
8187 8188
		iwl3945_radio_kill_sw(priv, 1);
		break;
8189 8190 8191
	default:
		IWL_WARNING("we recieved unexpected RFKILL state %d\n", state);
		break;
8192
	}
8193
out_unlock:
8194 8195 8196 8197 8198 8199 8200 8201 8202 8203 8204 8205 8206
	mutex_unlock(&priv->mutex);

	return err;
}

int iwl3945_rfkill_init(struct iwl3945_priv *priv)
{
	struct device *device = wiphy_dev(priv->hw->wiphy);
	int ret = 0;

	BUG_ON(device == NULL);

	IWL_DEBUG_RF_KILL("Initializing RFKILL.\n");
8207 8208
	priv->rfkill = rfkill_allocate(device, RFKILL_TYPE_WLAN);
	if (!priv->rfkill) {
8209 8210 8211 8212 8213
		IWL_ERROR("Unable to allocate rfkill device.\n");
		ret = -ENOMEM;
		goto error;
	}

8214 8215 8216 8217 8218
	priv->rfkill->name = priv->cfg->name;
	priv->rfkill->data = priv;
	priv->rfkill->state = RFKILL_STATE_UNBLOCKED;
	priv->rfkill->toggle_radio = iwl3945_rfkill_soft_rf_kill;
	priv->rfkill->user_claim_unsupported = 1;
8219

8220 8221
	priv->rfkill->dev.class->suspend = NULL;
	priv->rfkill->dev.class->resume = NULL;
8222

8223
	ret = rfkill_register(priv->rfkill);
8224 8225
	if (ret) {
		IWL_ERROR("Unable to register rfkill: %d\n", ret);
8226
		goto freed_rfkill;
8227 8228 8229 8230 8231 8232
	}

	IWL_DEBUG_RF_KILL("RFKILL initialization complete.\n");
	return ret;

freed_rfkill:
8233 8234 8235
	if (priv->rfkill != NULL)
		rfkill_free(priv->rfkill);
	priv->rfkill = NULL;
8236 8237 8238 8239 8240 8241 8242 8243

error:
	IWL_DEBUG_RF_KILL("RFKILL initialization complete.\n");
	return ret;
}

void iwl3945_rfkill_unregister(struct iwl3945_priv *priv)
{
8244 8245
	if (priv->rfkill)
		rfkill_unregister(priv->rfkill);
8246

8247
	priv->rfkill = NULL;
8248 8249 8250 8251 8252 8253
}

/* set rf-kill to the right state. */
void iwl3945_rfkill_set_hw_state(struct iwl3945_priv *priv)
{

8254 8255 8256 8257 8258
	if (!priv->rfkill)
		return;

	if (iwl3945_is_rfkill_hw(priv)) {
		rfkill_force_state(priv->rfkill, RFKILL_STATE_HARD_BLOCKED);
8259
		return;
8260
	}
8261

8262 8263
	if (!iwl3945_is_rfkill_sw(priv))
		rfkill_force_state(priv->rfkill, RFKILL_STATE_UNBLOCKED);
8264
	else
8265
		rfkill_force_state(priv->rfkill, RFKILL_STATE_SOFT_BLOCKED);
8266 8267 8268
}
#endif

Z
Zhu Yi 已提交
8269 8270 8271 8272 8273 8274
/*****************************************************************************
 *
 * driver and module entry point
 *
 *****************************************************************************/

C
Christoph Hellwig 已提交
8275
static struct pci_driver iwl3945_driver = {
Z
Zhu Yi 已提交
8276
	.name = DRV_NAME,
C
Christoph Hellwig 已提交
8277 8278 8279
	.id_table = iwl3945_hw_card_ids,
	.probe = iwl3945_pci_probe,
	.remove = __devexit_p(iwl3945_pci_remove),
Z
Zhu Yi 已提交
8280
#ifdef CONFIG_PM
C
Christoph Hellwig 已提交
8281 8282
	.suspend = iwl3945_pci_suspend,
	.resume = iwl3945_pci_resume,
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#endif
};

C
Christoph Hellwig 已提交
8286
static int __init iwl3945_init(void)
Z
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{

	int ret;
	printk(KERN_INFO DRV_NAME ": " DRV_DESCRIPTION ", " DRV_VERSION "\n");
	printk(KERN_INFO DRV_NAME ": " DRV_COPYRIGHT "\n");
8292 8293 8294 8295 8296 8297 8298

	ret = iwl3945_rate_control_register();
	if (ret) {
		IWL_ERROR("Unable to register rate control algorithm: %d\n", ret);
		return ret;
	}

C
Christoph Hellwig 已提交
8299
	ret = pci_register_driver(&iwl3945_driver);
Z
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	if (ret) {
		IWL_ERROR("Unable to initialize PCI module\n");
8302
		goto error_register;
Z
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8303
	}
8304
#ifdef CONFIG_IWL3945_DEBUG
C
Christoph Hellwig 已提交
8305
	ret = driver_create_file(&iwl3945_driver.driver, &driver_attr_debug_level);
Z
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	if (ret) {
		IWL_ERROR("Unable to create driver sysfs file\n");
8308
		goto error_debug;
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	}
#endif

	return ret;
8313 8314 8315 8316 8317 8318 8319 8320

#ifdef CONFIG_IWL3945_DEBUG
error_debug:
	pci_unregister_driver(&iwl3945_driver);
#endif
error_register:
	iwl3945_rate_control_unregister();
	return ret;
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}

C
Christoph Hellwig 已提交
8323
static void __exit iwl3945_exit(void)
Z
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8324
{
8325
#ifdef CONFIG_IWL3945_DEBUG
C
Christoph Hellwig 已提交
8326
	driver_remove_file(&iwl3945_driver.driver, &driver_attr_debug_level);
Z
Zhu Yi 已提交
8327
#endif
C
Christoph Hellwig 已提交
8328
	pci_unregister_driver(&iwl3945_driver);
8329
	iwl3945_rate_control_unregister();
Z
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}

C
Christoph Hellwig 已提交
8332
module_param_named(antenna, iwl3945_param_antenna, int, 0444);
Z
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8333
MODULE_PARM_DESC(antenna, "select antenna (1=Main, 2=Aux, default 0 [both])");
C
Christoph Hellwig 已提交
8334
module_param_named(disable, iwl3945_param_disable, int, 0444);
Z
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8335
MODULE_PARM_DESC(disable, "manually disable the radio (default 0 [radio on])");
C
Christoph Hellwig 已提交
8336
module_param_named(hwcrypto, iwl3945_param_hwcrypto, int, 0444);
Z
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8337 8338
MODULE_PARM_DESC(hwcrypto,
		 "using hardware crypto engine (default 0 [software])\n");
C
Christoph Hellwig 已提交
8339
module_param_named(debug, iwl3945_param_debug, int, 0444);
Z
Zhu Yi 已提交
8340
MODULE_PARM_DESC(debug, "debug output mask");
C
Christoph Hellwig 已提交
8341
module_param_named(disable_hw_scan, iwl3945_param_disable_hw_scan, int, 0444);
Z
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8342 8343
MODULE_PARM_DESC(disable_hw_scan, "disable hardware scanning (default 0)");

C
Christoph Hellwig 已提交
8344
module_param_named(queues_num, iwl3945_param_queues_num, int, 0444);
Z
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8345 8346 8347
MODULE_PARM_DESC(queues_num, "number of hw queues.");

/* QoS */
C
Christoph Hellwig 已提交
8348
module_param_named(qos_enable, iwl3945_param_qos_enable, int, 0444);
Z
Zhu Yi 已提交
8349 8350
MODULE_PARM_DESC(qos_enable, "enable all QoS functionality");

C
Christoph Hellwig 已提交
8351 8352
module_exit(iwl3945_exit);
module_init(iwl3945_init);