ipw2200.c 197.1 KB
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/******************************************************************************
  
  Copyright(c) 2003 - 2004 Intel Corporation. All rights reserved.

  802.11 status code portion of this file from ethereal-0.10.6:
    Copyright 2000, Axis Communications AB
    Ethereal - Network traffic analyzer
    By Gerald Combs <gerald@ethereal.com>
    Copyright 1998 Gerald Combs

  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., 59 
  Temple Place - Suite 330, Boston, MA  02111-1307, 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 "ipw2200.h"

#define IPW2200_VERSION "1.0.0"
#define DRV_DESCRIPTION	"Intel(R) PRO/Wireless 2200/2915 Network Driver"
#define DRV_COPYRIGHT	"Copyright(c) 2003-2004 Intel Corporation"
#define DRV_VERSION     IPW2200_VERSION

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

static int debug = 0;
static int channel = 0;
static char *ifname;
static int mode = 0;

static u32 ipw_debug_level;
static int associate = 1;
static int auto_create = 1;
static int disable = 0;
static const char ipw_modes[] = {
	'a', 'b', 'g', '?'
};

static void ipw_rx(struct ipw_priv *priv);
static int ipw_queue_tx_reclaim(struct ipw_priv *priv, 
				struct clx2_tx_queue *txq, int qindex);
static int ipw_queue_reset(struct ipw_priv *priv);

static int ipw_queue_tx_hcmd(struct ipw_priv *priv, int hcmd, void *buf,
			     int len, int sync);

static void ipw_tx_queue_free(struct ipw_priv *);

static struct ipw_rx_queue *ipw_rx_queue_alloc(struct ipw_priv *);
static void ipw_rx_queue_free(struct ipw_priv *, struct ipw_rx_queue *);
static void ipw_rx_queue_replenish(void *);

static int ipw_up(struct ipw_priv *);
static void ipw_down(struct ipw_priv *);
static int ipw_config(struct ipw_priv *);
static int init_supported_rates(struct ipw_priv *priv, struct ipw_supported_rates *prates);

static u8 band_b_active_channel[MAX_B_CHANNELS] = {
	1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 0
};
static u8 band_a_active_channel[MAX_A_CHANNELS] = {
	36, 40, 44, 48, 149, 153, 157, 161, 165, 52, 56, 60, 64, 0
};

static int is_valid_channel(int mode_mask, int channel)
{
	int i;

	if (!channel)
		return 0;

	if (mode_mask & IEEE_A)
		for (i = 0; i < MAX_A_CHANNELS; i++)
			if (band_a_active_channel[i] == channel)
				return IEEE_A;

	if (mode_mask & (IEEE_B | IEEE_G))
		for (i = 0; i < MAX_B_CHANNELS; i++)
			if (band_b_active_channel[i] == channel)
				return mode_mask & (IEEE_B | IEEE_G);

	return 0;
}

static char *snprint_line(char *buf, size_t count, 
			  const u8 *data, u32 len, u32 ofs)
{
	int out, i, j, l;
	char c;
	
	out = snprintf(buf, count, "%08X", ofs);

	for (l = 0, i = 0; i < 2; i++) {
		out += snprintf(buf + out, count - out, " ");
		for (j = 0; j < 8 && l < len; j++, l++) 
			out += snprintf(buf + out, count - out, "%02X ", 
					data[(i * 8 + j)]);
		for (; j < 8; j++)
			out += snprintf(buf + out, count - out, "   ");
	}
	
	out += snprintf(buf + out, count - out, " ");
	for (l = 0, i = 0; i < 2; i++) {
		out += snprintf(buf + out, count - out, " ");
		for (j = 0; j < 8 && l < len; j++, l++) {
			c = data[(i * 8 + j)];
			if (!isascii(c) || !isprint(c))
				c = '.';
			
			out += snprintf(buf + out, count - out, "%c", c);
		}

		for (; j < 8; j++)
			out += snprintf(buf + out, count - out, " ");
	}
	
	return buf;
}

static void printk_buf(int level, const u8 *data, u32 len)
{
	char line[81];
	u32 ofs = 0;
	if (!(ipw_debug_level & level))
		return;

	while (len) {
		printk(KERN_DEBUG "%s\n",
		       snprint_line(line, sizeof(line), &data[ofs], 
				    min(len, 16U), ofs));
		ofs += 16;
		len -= min(len, 16U);
	}
}

static u32 _ipw_read_reg32(struct ipw_priv *priv, u32 reg);
#define ipw_read_reg32(a, b) _ipw_read_reg32(a, b)

static u8 _ipw_read_reg8(struct ipw_priv *ipw, u32 reg);
#define ipw_read_reg8(a, b) _ipw_read_reg8(a, b)

static void _ipw_write_reg8(struct ipw_priv *priv, u32 reg, u8 value);
static inline void ipw_write_reg8(struct ipw_priv *a, u32 b, u8 c)
{
	IPW_DEBUG_IO("%s %d: write_indirect8(0x%08X, 0x%08X)\n", __FILE__, __LINE__, (u32)(b), (u32)(c)); 
	_ipw_write_reg8(a, b, c);
}

static void _ipw_write_reg16(struct ipw_priv *priv, u32 reg, u16 value);
static inline void ipw_write_reg16(struct ipw_priv *a, u32 b, u16 c)
{
	IPW_DEBUG_IO("%s %d: write_indirect16(0x%08X, 0x%08X)\n", __FILE__, __LINE__, (u32)(b), (u32)(c)); 
	_ipw_write_reg16(a, b, c);
}

static void _ipw_write_reg32(struct ipw_priv *priv, u32 reg, u32 value);
static inline void ipw_write_reg32(struct ipw_priv *a, u32 b, u32 c)
{
	IPW_DEBUG_IO("%s %d: write_indirect32(0x%08X, 0x%08X)\n", __FILE__, __LINE__, (u32)(b), (u32)(c)); 	
	_ipw_write_reg32(a, b, c);
}

#define _ipw_write8(ipw, ofs, val) writeb((val), (ipw)->hw_base + (ofs))
#define ipw_write8(ipw, ofs, val) \
 IPW_DEBUG_IO("%s %d: write_direct8(0x%08X, 0x%08X)\n", __FILE__, __LINE__, (u32)(ofs), (u32)(val)); \
 _ipw_write8(ipw, ofs, val)

#define _ipw_write16(ipw, ofs, val) writew((val), (ipw)->hw_base + (ofs))
#define ipw_write16(ipw, ofs, val) \
 IPW_DEBUG_IO("%s %d: write_direct16(0x%08X, 0x%08X)\n", __FILE__, __LINE__, (u32)(ofs), (u32)(val)); \
 _ipw_write16(ipw, ofs, val)

#define _ipw_write32(ipw, ofs, val) writel((val), (ipw)->hw_base + (ofs))
#define ipw_write32(ipw, ofs, val) \
 IPW_DEBUG_IO("%s %d: write_direct32(0x%08X, 0x%08X)\n", __FILE__, __LINE__, (u32)(ofs), (u32)(val)); \
 _ipw_write32(ipw, ofs, val)

#define _ipw_read8(ipw, ofs) readb((ipw)->hw_base + (ofs))
static inline u8 __ipw_read8(char *f, u32 l, struct ipw_priv *ipw, u32 ofs) {
	IPW_DEBUG_IO("%s %d: read_direct8(0x%08X)\n", f, l, (u32)(ofs));
	return _ipw_read8(ipw, ofs);
}
#define ipw_read8(ipw, ofs) __ipw_read8(__FILE__, __LINE__, ipw, ofs)

#define _ipw_read16(ipw, ofs) readw((ipw)->hw_base + (ofs))
static inline u16 __ipw_read16(char *f, u32 l, struct ipw_priv *ipw, u32 ofs) {
	IPW_DEBUG_IO("%s %d: read_direct16(0x%08X)\n", f, l, (u32)(ofs));
	return _ipw_read16(ipw, ofs);
}
#define ipw_read16(ipw, ofs) __ipw_read16(__FILE__, __LINE__, ipw, ofs)

#define _ipw_read32(ipw, ofs) readl((ipw)->hw_base + (ofs))
static inline u32 __ipw_read32(char *f, u32 l, struct ipw_priv *ipw, u32 ofs) {
	IPW_DEBUG_IO("%s %d: read_direct32(0x%08X)\n", f, l, (u32)(ofs));
	return _ipw_read32(ipw, ofs);
}
#define ipw_read32(ipw, ofs) __ipw_read32(__FILE__, __LINE__, ipw, ofs)

static void _ipw_read_indirect(struct ipw_priv *, u32, u8 *, int);
#define ipw_read_indirect(a, b, c, d) \
	IPW_DEBUG_IO("%s %d: read_inddirect(0x%08X) %d bytes\n", __FILE__, __LINE__, (u32)(b), d); \
	_ipw_read_indirect(a, b, c, d)

static void _ipw_write_indirect(struct ipw_priv *priv, u32 addr, u8 *data, int num);
#define ipw_write_indirect(a, b, c, d) \
	IPW_DEBUG_IO("%s %d: write_indirect(0x%08X) %d bytes\n", __FILE__, __LINE__, (u32)(b), d); \
        _ipw_write_indirect(a, b, c, d)

/* indirect write s */
static void _ipw_write_reg32(struct ipw_priv *priv, u32 reg,
			     u32 value)
{
	IPW_DEBUG_IO(" %p : reg = 0x%8X : value = 0x%8X\n", 
		     priv, reg, value);
	_ipw_write32(priv, CX2_INDIRECT_ADDR, reg);
	_ipw_write32(priv, CX2_INDIRECT_DATA, value);
}


static void _ipw_write_reg8(struct ipw_priv *priv, u32 reg, u8 value)
{
	IPW_DEBUG_IO(" reg = 0x%8X : value = 0x%8X\n", reg, value);
	_ipw_write32(priv, CX2_INDIRECT_ADDR, reg & CX2_INDIRECT_ADDR_MASK);
	_ipw_write8(priv, CX2_INDIRECT_DATA, value);
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	IPW_DEBUG_IO(" reg = 0x%8lX : value = 0x%8X\n", 
		     (unsigned long)(priv->hw_base + CX2_INDIRECT_DATA),
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		     value);
}

static void _ipw_write_reg16(struct ipw_priv *priv, u32 reg,
			     u16 value)
{
	IPW_DEBUG_IO(" reg = 0x%8X : value = 0x%8X\n", reg, value);
	_ipw_write32(priv, CX2_INDIRECT_ADDR, reg & CX2_INDIRECT_ADDR_MASK);
	_ipw_write16(priv, CX2_INDIRECT_DATA, value);
}

/* indirect read s */

static u8 _ipw_read_reg8(struct ipw_priv *priv, u32 reg)
{
	u32 word;
	_ipw_write32(priv, CX2_INDIRECT_ADDR, reg & CX2_INDIRECT_ADDR_MASK);
	IPW_DEBUG_IO(" reg = 0x%8X : \n", reg);
	word = _ipw_read32(priv, CX2_INDIRECT_DATA);
	return (word >> ((reg & 0x3)*8)) & 0xff;
}

static u32 _ipw_read_reg32(struct ipw_priv *priv, u32 reg)
{
	u32 value;

	IPW_DEBUG_IO("%p : reg = 0x%08x\n", priv, reg);

	_ipw_write32(priv, CX2_INDIRECT_ADDR, reg);
	value = _ipw_read32(priv, CX2_INDIRECT_DATA);
	IPW_DEBUG_IO(" reg = 0x%4X : value = 0x%4x \n", reg, value);
	return value;
}

/* iterative/auto-increment 32 bit reads and writes */
static void _ipw_read_indirect(struct ipw_priv *priv, u32 addr, u8 * buf,
			       int num)
{
	u32 aligned_addr = addr & CX2_INDIRECT_ADDR_MASK;
	u32 dif_len = addr - aligned_addr;
	u32 aligned_len;
	u32 i;
	
	IPW_DEBUG_IO("addr = %i, buf = %p, num = %i\n", addr, buf, num);

	/* Read the first nibble byte by byte */
	if (unlikely(dif_len)) {
		/* Start reading at aligned_addr + dif_len */
		_ipw_write32(priv, CX2_INDIRECT_ADDR, aligned_addr);
		for (i = dif_len; i < 4; i++, buf++)
			*buf = _ipw_read8(priv, CX2_INDIRECT_DATA + i);
		num -= dif_len;
		aligned_addr += 4;
	}

	/* Read DWs through autoinc register */
	_ipw_write32(priv, CX2_AUTOINC_ADDR, aligned_addr);
	aligned_len = num & CX2_INDIRECT_ADDR_MASK;
	for (i = 0; i < aligned_len; i += 4, buf += 4, aligned_addr += 4)
		*(u32*)buf = ipw_read32(priv, CX2_AUTOINC_DATA);
	
	/* Copy the last nibble */
	dif_len = num - aligned_len;
	_ipw_write32(priv, CX2_INDIRECT_ADDR, aligned_addr);
	for (i = 0; i < dif_len; i++, buf++)
		*buf = ipw_read8(priv, CX2_INDIRECT_DATA + i);
}

static void _ipw_write_indirect(struct ipw_priv *priv, u32 addr, u8 *buf, 
				int num)
{
	u32 aligned_addr = addr & CX2_INDIRECT_ADDR_MASK;
	u32 dif_len = addr - aligned_addr;
	u32 aligned_len;
	u32 i;
	
	IPW_DEBUG_IO("addr = %i, buf = %p, num = %i\n", addr, buf, num);
	
	/* Write the first nibble byte by byte */
	if (unlikely(dif_len)) {
		/* Start writing at aligned_addr + dif_len */
		_ipw_write32(priv, CX2_INDIRECT_ADDR, aligned_addr);
		for (i = dif_len; i < 4; i++, buf++)
			_ipw_write8(priv, CX2_INDIRECT_DATA + i, *buf);
		num -= dif_len;
		aligned_addr += 4;
	}
	
	/* Write DWs through autoinc register */
	_ipw_write32(priv, CX2_AUTOINC_ADDR, aligned_addr);
	aligned_len = num & CX2_INDIRECT_ADDR_MASK;
	for (i = 0; i < aligned_len; i += 4, buf += 4, aligned_addr += 4)
		_ipw_write32(priv, CX2_AUTOINC_DATA, *(u32*)buf);
	
	/* Copy the last nibble */
	dif_len = num - aligned_len;
	_ipw_write32(priv, CX2_INDIRECT_ADDR, aligned_addr);
	for (i = 0; i < dif_len; i++, buf++)
		_ipw_write8(priv, CX2_INDIRECT_DATA + i, *buf);
}

static void ipw_write_direct(struct ipw_priv *priv, u32 addr, void *buf, 
			     int num)
{
	memcpy_toio((priv->hw_base + addr), buf, num);
}

static inline void ipw_set_bit(struct ipw_priv *priv, u32 reg, u32 mask)
{
	ipw_write32(priv, reg, ipw_read32(priv, reg) | mask);
}

static inline void ipw_clear_bit(struct ipw_priv *priv, u32 reg, u32 mask)
{
	ipw_write32(priv, reg, ipw_read32(priv, reg) & ~mask);
}

static inline void ipw_enable_interrupts(struct ipw_priv *priv)
{
	if (priv->status & STATUS_INT_ENABLED)
		return;
	priv->status |= STATUS_INT_ENABLED;
	ipw_write32(priv, CX2_INTA_MASK_R, CX2_INTA_MASK_ALL);
}

static inline void ipw_disable_interrupts(struct ipw_priv *priv)
{
	if (!(priv->status & STATUS_INT_ENABLED))
		return;
	priv->status &= ~STATUS_INT_ENABLED;
	ipw_write32(priv, CX2_INTA_MASK_R, ~CX2_INTA_MASK_ALL);
}

static char *ipw_error_desc(u32 val)
{
	switch (val) {
	case IPW_FW_ERROR_OK: 
		return "ERROR_OK";
	case IPW_FW_ERROR_FAIL: 
		return "ERROR_FAIL";
	case IPW_FW_ERROR_MEMORY_UNDERFLOW: 
		return "MEMORY_UNDERFLOW";
	case IPW_FW_ERROR_MEMORY_OVERFLOW: 
		return "MEMORY_OVERFLOW";
	case IPW_FW_ERROR_BAD_PARAM: 
		return "ERROR_BAD_PARAM";
	case IPW_FW_ERROR_BAD_CHECKSUM: 
		return "ERROR_BAD_CHECKSUM";
	case IPW_FW_ERROR_NMI_INTERRUPT: 
		return "ERROR_NMI_INTERRUPT";
	case IPW_FW_ERROR_BAD_DATABASE: 
		return "ERROR_BAD_DATABASE";
	case IPW_FW_ERROR_ALLOC_FAIL: 
		return "ERROR_ALLOC_FAIL";
	case IPW_FW_ERROR_DMA_UNDERRUN: 
		return "ERROR_DMA_UNDERRUN";
	case IPW_FW_ERROR_DMA_STATUS: 
		return "ERROR_DMA_STATUS";
	case IPW_FW_ERROR_DINOSTATUS_ERROR: 
		return "ERROR_DINOSTATUS_ERROR";
	case IPW_FW_ERROR_EEPROMSTATUS_ERROR: 
		return "ERROR_EEPROMSTATUS_ERROR";
	case IPW_FW_ERROR_SYSASSERT: 
		return "ERROR_SYSASSERT";
	case IPW_FW_ERROR_FATAL_ERROR: 
		return "ERROR_FATALSTATUS_ERROR";
	default: 
		return "UNKNOWNSTATUS_ERROR";
	}
}

static void ipw_dump_nic_error_log(struct ipw_priv *priv)
{
	u32 desc, time, blink1, blink2, ilink1, ilink2, idata, i, count, base;

	base = ipw_read32(priv, IPWSTATUS_ERROR_LOG);
	count = ipw_read_reg32(priv, base);
	
	if (ERROR_START_OFFSET <= count * ERROR_ELEM_SIZE) {
		IPW_ERROR("Start IPW Error Log Dump:\n");
		IPW_ERROR("Status: 0x%08X, Config: %08X\n",
			  priv->status, priv->config);
	}

	for (i = ERROR_START_OFFSET; 
	     i <= count * ERROR_ELEM_SIZE; 
	     i += ERROR_ELEM_SIZE) {
		desc   = ipw_read_reg32(priv, base + i);
		time   = ipw_read_reg32(priv, base + i + 1*sizeof(u32));
		blink1 = ipw_read_reg32(priv, base + i + 2*sizeof(u32));
		blink2 = ipw_read_reg32(priv, base + i + 3*sizeof(u32));
		ilink1 = ipw_read_reg32(priv, base + i + 4*sizeof(u32));
		ilink2 = ipw_read_reg32(priv, base + i + 5*sizeof(u32));
		idata =  ipw_read_reg32(priv, base + i + 6*sizeof(u32));

		IPW_ERROR(
			"%s %i 0x%08x  0x%08x  0x%08x  0x%08x  0x%08x\n", 
			ipw_error_desc(desc), time, blink1, blink2, 
			ilink1, ilink2, idata);
	}
}

static void ipw_dump_nic_event_log(struct ipw_priv *priv)
{
	u32 ev, time, data, i, count, base;

	base = ipw_read32(priv, IPW_EVENT_LOG);
	count = ipw_read_reg32(priv, base);
	
	if (EVENT_START_OFFSET <= count * EVENT_ELEM_SIZE)
		IPW_ERROR("Start IPW Event Log Dump:\n");

	for (i = EVENT_START_OFFSET; 
	     i <= count * EVENT_ELEM_SIZE; 
	     i += EVENT_ELEM_SIZE) {
		ev = ipw_read_reg32(priv, base + i);
		time  = ipw_read_reg32(priv, base + i + 1*sizeof(u32));
		data  = ipw_read_reg32(priv, base + i + 2*sizeof(u32));

#ifdef CONFIG_IPW_DEBUG
		IPW_ERROR("%i\t0x%08x\t%i\n", time, data, ev);
#endif
	}
}

static int ipw_get_ordinal(struct ipw_priv *priv, u32 ord, void *val,
			   u32 *len)
{
	u32 addr, field_info, field_len, field_count, total_len;

	IPW_DEBUG_ORD("ordinal = %i\n", ord);

	if (!priv || !val || !len) {
		IPW_DEBUG_ORD("Invalid argument\n");
		return -EINVAL;
	}
	
	/* verify device ordinal tables have been initialized */
	if (!priv->table0_addr || !priv->table1_addr || !priv->table2_addr) {
		IPW_DEBUG_ORD("Access ordinals before initialization\n");
		return -EINVAL;
	}

	switch (IPW_ORD_TABLE_ID_MASK & ord) {
	case IPW_ORD_TABLE_0_MASK:
		/*
		 * TABLE 0: Direct access to a table of 32 bit values
		 *
		 * This is a very simple table with the data directly 
		 * read from the table
		 */

		/* remove the table id from the ordinal */
		ord &= IPW_ORD_TABLE_VALUE_MASK;

		/* boundary check */
		if (ord > priv->table0_len) {
			IPW_DEBUG_ORD("ordinal value (%i) longer then "
				      "max (%i)\n", ord, priv->table0_len);
			return -EINVAL;
		}

		/* verify we have enough room to store the value */
		if (*len < sizeof(u32)) {
			IPW_DEBUG_ORD("ordinal buffer length too small, "
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				      "need %zd\n", sizeof(u32));
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			return -EINVAL;
		}

		IPW_DEBUG_ORD("Reading TABLE0[%i] from offset 0x%08x\n",
			      ord, priv->table0_addr + (ord  << 2));

		*len = sizeof(u32);
		ord <<= 2;
		*((u32 *)val) = ipw_read32(priv, priv->table0_addr + ord);
		break;

	case IPW_ORD_TABLE_1_MASK:
		/*
		 * TABLE 1: Indirect access to a table of 32 bit values
		 * 
		 * This is a fairly large table of u32 values each 
		 * representing starting addr for the data (which is
		 * also a u32)
		 */

		/* remove the table id from the ordinal */
		ord &= IPW_ORD_TABLE_VALUE_MASK;
		
		/* boundary check */
		if (ord > priv->table1_len) {
			IPW_DEBUG_ORD("ordinal value too long\n");
			return -EINVAL;
		}

		/* verify we have enough room to store the value */
		if (*len < sizeof(u32)) {
			IPW_DEBUG_ORD("ordinal buffer length too small, "
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				      "need %zd\n", sizeof(u32));
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			return -EINVAL;
		}

		*((u32 *)val) = ipw_read_reg32(priv, (priv->table1_addr + (ord << 2)));
		*len = sizeof(u32);
		break;

	case IPW_ORD_TABLE_2_MASK:
		/*
		 * TABLE 2: Indirect access to a table of variable sized values
		 *
		 * This table consist of six values, each containing
		 *     - dword containing the starting offset of the data
		 *     - dword containing the lengh in the first 16bits
		 *       and the count in the second 16bits
		 */

		/* remove the table id from the ordinal */
		ord &= IPW_ORD_TABLE_VALUE_MASK;

		/* boundary check */
		if (ord > priv->table2_len) {
			IPW_DEBUG_ORD("ordinal value too long\n");
			return -EINVAL;
		}

		/* get the address of statistic */
		addr = ipw_read_reg32(priv, priv->table2_addr + (ord << 3));
		
		/* get the second DW of statistics ; 
		 * two 16-bit words - first is length, second is count */
		field_info = ipw_read_reg32(priv, priv->table2_addr + (ord << 3) + sizeof(u32));
		
		/* get each entry length */
		field_len = *((u16 *)&field_info);
		
		/* get number of entries */
		field_count = *(((u16 *)&field_info) + 1);
		
		/* abort if not enought memory */
		total_len = field_len * field_count;
		if (total_len > *len) {
			*len = total_len;
			return -EINVAL;
		}
		
		*len = total_len;
		if (!total_len)
			return 0;

		IPW_DEBUG_ORD("addr = 0x%08x, total_len = %i, "
			      "field_info = 0x%08x\n", 
			      addr, total_len, field_info);
		ipw_read_indirect(priv, addr, val, total_len);
		break;

	default:
		IPW_DEBUG_ORD("Invalid ordinal!\n");
		return -EINVAL;

	}

	
	return 0;
}

static void ipw_init_ordinals(struct ipw_priv *priv)
{
	priv->table0_addr = IPW_ORDINALS_TABLE_LOWER;
	priv->table0_len = ipw_read32(priv, priv->table0_addr); 

	IPW_DEBUG_ORD("table 0 offset at 0x%08x, len = %i\n",
		      priv->table0_addr, priv->table0_len);

	priv->table1_addr = ipw_read32(priv, IPW_ORDINALS_TABLE_1);
	priv->table1_len = ipw_read_reg32(priv, priv->table1_addr);

	IPW_DEBUG_ORD("table 1 offset at 0x%08x, len = %i\n",
		      priv->table1_addr, priv->table1_len);

	priv->table2_addr = ipw_read32(priv, IPW_ORDINALS_TABLE_2);
	priv->table2_len = ipw_read_reg32(priv, priv->table2_addr);
	priv->table2_len &= 0x0000ffff; /* use first two bytes */

	IPW_DEBUG_ORD("table 2 offset at 0x%08x, len = %i\n",
		      priv->table2_addr, priv->table2_len);

}

/*
 * The following adds a new attribute to the sysfs representation
 * of this device driver (i.e. a new file in /sys/bus/pci/drivers/ipw/)
 * used for controling the debug level.
 * 
 * See the level definitions in ipw for details.
 */
static ssize_t show_debug_level(struct device_driver *d, char *buf)
{
	return sprintf(buf, "0x%08X\n", ipw_debug_level);
}
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static ssize_t store_debug_level(struct device_driver *d,
				const char *buf, size_t count)
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{
	char *p = (char *)buf;
	u32 val;

	if (p[1] == 'x' || p[1] == 'X' || p[0] == 'x' || p[0] == 'X') {
		p++;
		if (p[0] == 'x' || p[0] == 'X')
			p++;
		val = simple_strtoul(p, &p, 16);
	} else
		val = simple_strtoul(p, &p, 10);
	if (p == buf) 
		printk(KERN_INFO DRV_NAME 
		       ": %s is not in hex or decimal form.\n", buf);
	else
		ipw_debug_level = val;

	return strnlen(buf, count);
}

static DRIVER_ATTR(debug_level, S_IWUSR | S_IRUGO, 
		   show_debug_level, store_debug_level);

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static ssize_t show_status(struct device *d,
			struct device_attribute *attr, char *buf)
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{
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	struct ipw_priv *p = d->driver_data;
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	return sprintf(buf, "0x%08x\n", (int)p->status);
}
static DEVICE_ATTR(status, S_IRUGO, show_status, NULL);

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static ssize_t show_cfg(struct device *d, struct device_attribute *attr,
			char *buf)
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{
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	struct ipw_priv *p = d->driver_data;
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	return sprintf(buf, "0x%08x\n", (int)p->config);
}
static DEVICE_ATTR(cfg, S_IRUGO, show_cfg, NULL);

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static ssize_t show_nic_type(struct device *d,
			struct device_attribute *attr, char *buf)
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{
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	struct ipw_priv *p = d->driver_data;
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	u8 type = p->eeprom[EEPROM_NIC_TYPE];

	switch (type) {
	case EEPROM_NIC_TYPE_STANDARD:
		return sprintf(buf, "STANDARD\n");
	case EEPROM_NIC_TYPE_DELL:
		return sprintf(buf, "DELL\n");
	case EEPROM_NIC_TYPE_FUJITSU:
		return sprintf(buf, "FUJITSU\n");
	case EEPROM_NIC_TYPE_IBM:
		return sprintf(buf, "IBM\n");
	case EEPROM_NIC_TYPE_HP:
		return sprintf(buf, "HP\n");
	}
		
	return sprintf(buf, "UNKNOWN\n");
}
static DEVICE_ATTR(nic_type, S_IRUGO, show_nic_type, NULL);

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static ssize_t dump_error_log(struct device *d,
		struct device_attribute *attr, const char *buf, size_t count)
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{
	char *p = (char *)buf;

	if (p[0] == '1') 
		ipw_dump_nic_error_log((struct ipw_priv*)d->driver_data);

	return strnlen(buf, count);
}
static DEVICE_ATTR(dump_errors, S_IWUSR, NULL, dump_error_log);

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static ssize_t dump_event_log(struct device *d,
		struct device_attribute *attr, const char *buf, size_t count)
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{
	char *p = (char *)buf;

	if (p[0] == '1') 
		ipw_dump_nic_event_log((struct ipw_priv*)d->driver_data);

	return strnlen(buf, count);
}
static DEVICE_ATTR(dump_events, S_IWUSR, NULL, dump_event_log);

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static ssize_t show_ucode_version(struct device *d,
			struct device_attribute *attr, char *buf)
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{
	u32 len = sizeof(u32), tmp = 0;
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	struct ipw_priv *p = d->driver_data;
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	if(ipw_get_ordinal(p, IPW_ORD_STAT_UCODE_VERSION, &tmp, &len))
		return 0;

	return sprintf(buf, "0x%08x\n", tmp);
}
static DEVICE_ATTR(ucode_version, S_IWUSR|S_IRUGO, show_ucode_version, NULL);

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static ssize_t show_rtc(struct device *d, struct device_attribute *attr,
			char *buf)
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{
	u32 len = sizeof(u32), tmp = 0;
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	struct ipw_priv *p = d->driver_data;
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	if(ipw_get_ordinal(p, IPW_ORD_STAT_RTC, &tmp, &len))
		return 0;

	return sprintf(buf, "0x%08x\n", tmp);
}
static DEVICE_ATTR(rtc, S_IWUSR|S_IRUGO, show_rtc, NULL);

/*
 * Add a device attribute to view/control the delay between eeprom
 * operations.
 */
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static ssize_t show_eeprom_delay(struct device *d,
			struct device_attribute *attr, char *buf)
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{
	int n = ((struct ipw_priv*)d->driver_data)->eeprom_delay;
	return sprintf(buf, "%i\n", n);
}
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static ssize_t store_eeprom_delay(struct device *d,
			struct device_attribute *attr, const char *buf,
			size_t count)
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{
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	struct ipw_priv *p = d->driver_data;
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	sscanf(buf, "%i", &p->eeprom_delay);
	return strnlen(buf, count);
}
static DEVICE_ATTR(eeprom_delay, S_IWUSR|S_IRUGO, 
		   show_eeprom_delay,store_eeprom_delay);

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static ssize_t show_command_event_reg(struct device *d,
			struct device_attribute *attr, char *buf)
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{
	u32 reg = 0;
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	struct ipw_priv *p = d->driver_data;
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	reg = ipw_read_reg32(p, CX2_INTERNAL_CMD_EVENT);
	return sprintf(buf, "0x%08x\n", reg);
}
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static ssize_t store_command_event_reg(struct device *d,
				struct device_attribute *attr, const char *buf,
				size_t count)
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{
	u32 reg;
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	struct ipw_priv *p = d->driver_data;
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	sscanf(buf, "%x", &reg);
	ipw_write_reg32(p, CX2_INTERNAL_CMD_EVENT, reg);
	return strnlen(buf, count);
}
static DEVICE_ATTR(command_event_reg, S_IWUSR|S_IRUGO, 
		   show_command_event_reg,store_command_event_reg);

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static ssize_t show_mem_gpio_reg(struct device *d,
				struct device_attribute *attr, char *buf)
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{
	u32 reg = 0;
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	struct ipw_priv *p = d->driver_data;
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	reg = ipw_read_reg32(p, 0x301100);
	return sprintf(buf, "0x%08x\n", reg);
}
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static ssize_t store_mem_gpio_reg(struct device *d,
			struct device_attribute *attr, const char *buf,
			size_t count)
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{
	u32 reg;
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	struct ipw_priv *p = d->driver_data;
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	sscanf(buf, "%x", &reg);
	ipw_write_reg32(p, 0x301100, reg);
	return strnlen(buf, count);
}
static DEVICE_ATTR(mem_gpio_reg, S_IWUSR|S_IRUGO,
		   show_mem_gpio_reg,store_mem_gpio_reg);

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static ssize_t show_indirect_dword(struct device *d,
				struct device_attribute *attr, char *buf)
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{
	u32 reg = 0;
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	struct ipw_priv *priv = d->driver_data;
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	if (priv->status & STATUS_INDIRECT_DWORD) 
		reg = ipw_read_reg32(priv, priv->indirect_dword);
	else 
		reg = 0;
	
	return sprintf(buf, "0x%08x\n", reg);
}
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static ssize_t store_indirect_dword(struct device *d,
				struct device_attribute *attr, const char *buf,
				size_t count)
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{
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	struct ipw_priv *priv = d->driver_data;
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	sscanf(buf, "%x", &priv->indirect_dword);
	priv->status |= STATUS_INDIRECT_DWORD;
	return strnlen(buf, count);
}
static DEVICE_ATTR(indirect_dword, S_IWUSR|S_IRUGO, 
		   show_indirect_dword,store_indirect_dword);

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static ssize_t show_indirect_byte(struct device *d,
			struct device_attribute *attr, char *buf)
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{
	u8 reg = 0;
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	struct ipw_priv *priv = d->driver_data;
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	if (priv->status & STATUS_INDIRECT_BYTE) 
		reg = ipw_read_reg8(priv, priv->indirect_byte);
	else 
		reg = 0;

	return sprintf(buf, "0x%02x\n", reg);
}
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static ssize_t store_indirect_byte(struct device *d,
				struct device_attribute *attr, const char *buf,
				size_t count)
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{
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	struct ipw_priv *priv = d->driver_data;
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	sscanf(buf, "%x", &priv->indirect_byte);
	priv->status |= STATUS_INDIRECT_BYTE;
	return strnlen(buf, count);
}
static DEVICE_ATTR(indirect_byte, S_IWUSR|S_IRUGO, 
		   show_indirect_byte, store_indirect_byte);

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static ssize_t show_direct_dword(struct device *d,
				struct device_attribute *attr, char *buf)
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{
	u32 reg = 0;
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	struct ipw_priv *priv = d->driver_data;
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	if (priv->status & STATUS_DIRECT_DWORD) 
		reg = ipw_read32(priv, priv->direct_dword);
	else 
		reg = 0;

	return sprintf(buf, "0x%08x\n", reg);
}
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static ssize_t store_direct_dword(struct device *d,
			struct device_attribute *attr, const char *buf,
			size_t count)
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{
893
	struct ipw_priv *priv = d->driver_data;
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	sscanf(buf, "%x", &priv->direct_dword);
	priv->status |= STATUS_DIRECT_DWORD;
	return strnlen(buf, count);
}
static DEVICE_ATTR(direct_dword, S_IWUSR|S_IRUGO, 
		   show_direct_dword,store_direct_dword);


static inline int rf_kill_active(struct ipw_priv *priv)
{
	if (0 == (ipw_read32(priv, 0x30) & 0x10000))
		priv->status |= STATUS_RF_KILL_HW;
	else
		priv->status &= ~STATUS_RF_KILL_HW;

	return (priv->status & STATUS_RF_KILL_HW) ? 1 : 0;
}

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static ssize_t show_rf_kill(struct device *d, struct device_attribute *attr,
				char *buf)
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{
	/* 0 - RF kill not enabled
	   1 - SW based RF kill active (sysfs) 
	   2 - HW based RF kill active
	   3 - Both HW and SW baed RF kill active */
920
	struct ipw_priv *priv = d->driver_data;
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	int val = ((priv->status & STATUS_RF_KILL_SW) ? 0x1 : 0x0) |
		(rf_kill_active(priv) ? 0x2 : 0x0);
	return sprintf(buf, "%i\n", val);
}

static int ipw_radio_kill_sw(struct ipw_priv *priv, int disable_radio)
{
	if ((disable_radio ? 1 : 0) == 
	    (priv->status & STATUS_RF_KILL_SW ? 1 : 0))
		return 0 ;

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

	if (disable_radio) {
		priv->status |= STATUS_RF_KILL_SW;

		if (priv->workqueue) { 
			cancel_delayed_work(&priv->request_scan);
		}
		wake_up_interruptible(&priv->wait_command_queue);
		queue_work(priv->workqueue, &priv->down);
	} else {
		priv->status &= ~STATUS_RF_KILL_SW;
		if (rf_kill_active(priv)) {
			IPW_DEBUG_RF_KILL("Can not turn radio back on - "
					  "disabled by HW switch\n");
			/* Make sure the RF_KILL check timer is running */
			cancel_delayed_work(&priv->rf_kill);
			queue_delayed_work(priv->workqueue, &priv->rf_kill, 
					   2 * HZ);
		} else 
			queue_work(priv->workqueue, &priv->up);
	}

	return 1;
}

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static ssize_t store_rf_kill(struct device *d,  struct device_attribute *attr,
				const char *buf, size_t count)
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{
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	struct ipw_priv *priv = d->driver_data;
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	ipw_radio_kill_sw(priv, buf[0] == '1');

	return count;
}
static DEVICE_ATTR(rf_kill, S_IWUSR|S_IRUGO, show_rf_kill, store_rf_kill);

static void ipw_irq_tasklet(struct ipw_priv *priv)
{
	u32 inta, inta_mask, handled = 0;
	unsigned long flags;
	int rc = 0;

	spin_lock_irqsave(&priv->lock, flags);

	inta = ipw_read32(priv, CX2_INTA_RW);
	inta_mask = ipw_read32(priv, CX2_INTA_MASK_R);
	inta &= (CX2_INTA_MASK_ALL & inta_mask);

	/* Add any cached INTA values that need to be handled */
	inta |= priv->isr_inta;

	/* handle all the justifications for the interrupt */
	if (inta & CX2_INTA_BIT_RX_TRANSFER) {
		ipw_rx(priv);
		handled |= CX2_INTA_BIT_RX_TRANSFER;
	}

	if (inta & CX2_INTA_BIT_TX_CMD_QUEUE) {
		IPW_DEBUG_HC("Command completed.\n");
		rc = ipw_queue_tx_reclaim( priv, &priv->txq_cmd, -1);
		priv->status &= ~STATUS_HCMD_ACTIVE;
		wake_up_interruptible(&priv->wait_command_queue);
		handled |= CX2_INTA_BIT_TX_CMD_QUEUE;
	}

	if (inta & CX2_INTA_BIT_TX_QUEUE_1) {
		IPW_DEBUG_TX("TX_QUEUE_1\n");
		rc = ipw_queue_tx_reclaim( priv, &priv->txq[0], 0);
		handled |= CX2_INTA_BIT_TX_QUEUE_1;
	}

	if (inta & CX2_INTA_BIT_TX_QUEUE_2) {
		IPW_DEBUG_TX("TX_QUEUE_2\n");
		rc = ipw_queue_tx_reclaim( priv, &priv->txq[1], 1);
		handled |= CX2_INTA_BIT_TX_QUEUE_2;
	}

	if (inta & CX2_INTA_BIT_TX_QUEUE_3) {
		IPW_DEBUG_TX("TX_QUEUE_3\n");
		rc = ipw_queue_tx_reclaim( priv, &priv->txq[2], 2);
		handled |= CX2_INTA_BIT_TX_QUEUE_3;
	}

	if (inta & CX2_INTA_BIT_TX_QUEUE_4) {
		IPW_DEBUG_TX("TX_QUEUE_4\n");
		rc = ipw_queue_tx_reclaim( priv, &priv->txq[3], 3);
		handled |= CX2_INTA_BIT_TX_QUEUE_4;
	}

	if (inta & CX2_INTA_BIT_STATUS_CHANGE) {
		IPW_WARNING("STATUS_CHANGE\n");
		handled |= CX2_INTA_BIT_STATUS_CHANGE;
	}

	if (inta & CX2_INTA_BIT_BEACON_PERIOD_EXPIRED) {
		IPW_WARNING("TX_PERIOD_EXPIRED\n");
		handled |= CX2_INTA_BIT_BEACON_PERIOD_EXPIRED;
	}

	if (inta & CX2_INTA_BIT_SLAVE_MODE_HOST_CMD_DONE) {
		IPW_WARNING("HOST_CMD_DONE\n");
		handled |= CX2_INTA_BIT_SLAVE_MODE_HOST_CMD_DONE;
	}

	if (inta & CX2_INTA_BIT_FW_INITIALIZATION_DONE) {
		IPW_WARNING("FW_INITIALIZATION_DONE\n");
		handled |= CX2_INTA_BIT_FW_INITIALIZATION_DONE;
	}

	if (inta & CX2_INTA_BIT_FW_CARD_DISABLE_PHY_OFF_DONE) {
		IPW_WARNING("PHY_OFF_DONE\n");
		handled |= CX2_INTA_BIT_FW_CARD_DISABLE_PHY_OFF_DONE;
	}

	if (inta & CX2_INTA_BIT_RF_KILL_DONE) {
		IPW_DEBUG_RF_KILL("RF_KILL_DONE\n");
		priv->status |= STATUS_RF_KILL_HW;
		wake_up_interruptible(&priv->wait_command_queue);
		netif_carrier_off(priv->net_dev);
		netif_stop_queue(priv->net_dev);
		cancel_delayed_work(&priv->request_scan);
		queue_delayed_work(priv->workqueue, &priv->rf_kill, 2 * HZ);
		handled |= CX2_INTA_BIT_RF_KILL_DONE;
	}
	
	if (inta & CX2_INTA_BIT_FATAL_ERROR) {
		IPW_ERROR("Firmware error detected.  Restarting.\n");
#ifdef CONFIG_IPW_DEBUG
		if (ipw_debug_level & IPW_DL_FW_ERRORS) {
			ipw_dump_nic_error_log(priv);
			ipw_dump_nic_event_log(priv);
		}
#endif
		queue_work(priv->workqueue, &priv->adapter_restart);
		handled |= CX2_INTA_BIT_FATAL_ERROR;
	}

	if (inta & CX2_INTA_BIT_PARITY_ERROR) {
		IPW_ERROR("Parity error\n");
		handled |= CX2_INTA_BIT_PARITY_ERROR;
	}

	if (handled != inta) {
		IPW_ERROR("Unhandled INTA bits 0x%08x\n", 
				inta & ~handled);
	}

	/* enable all interrupts */
	ipw_enable_interrupts(priv);

	spin_unlock_irqrestore(&priv->lock, flags);
}
 
#ifdef CONFIG_IPW_DEBUG
#define IPW_CMD(x) case IPW_CMD_ ## x : return #x
static char *get_cmd_string(u8 cmd)
{
	switch (cmd) {
		IPW_CMD(HOST_COMPLETE);
		IPW_CMD(POWER_DOWN); 
		IPW_CMD(SYSTEM_CONFIG); 
		IPW_CMD(MULTICAST_ADDRESS); 
		IPW_CMD(SSID); 
		IPW_CMD(ADAPTER_ADDRESS); 
		IPW_CMD(PORT_TYPE); 
		IPW_CMD(RTS_THRESHOLD); 
		IPW_CMD(FRAG_THRESHOLD); 
		IPW_CMD(POWER_MODE); 
		IPW_CMD(WEP_KEY); 
		IPW_CMD(TGI_TX_KEY); 
		IPW_CMD(SCAN_REQUEST); 
		IPW_CMD(SCAN_REQUEST_EXT); 
		IPW_CMD(ASSOCIATE); 
		IPW_CMD(SUPPORTED_RATES); 
		IPW_CMD(SCAN_ABORT); 
		IPW_CMD(TX_FLUSH); 
		IPW_CMD(QOS_PARAMETERS); 
		IPW_CMD(DINO_CONFIG); 
		IPW_CMD(RSN_CAPABILITIES); 
		IPW_CMD(RX_KEY); 
		IPW_CMD(CARD_DISABLE); 
		IPW_CMD(SEED_NUMBER); 
		IPW_CMD(TX_POWER); 
		IPW_CMD(COUNTRY_INFO); 
		IPW_CMD(AIRONET_INFO); 
		IPW_CMD(AP_TX_POWER); 
		IPW_CMD(CCKM_INFO); 
		IPW_CMD(CCX_VER_INFO); 
		IPW_CMD(SET_CALIBRATION); 
		IPW_CMD(SENSITIVITY_CALIB); 
		IPW_CMD(RETRY_LIMIT); 
		IPW_CMD(IPW_PRE_POWER_DOWN); 
		IPW_CMD(VAP_BEACON_TEMPLATE); 
		IPW_CMD(VAP_DTIM_PERIOD); 
		IPW_CMD(EXT_SUPPORTED_RATES); 
		IPW_CMD(VAP_LOCAL_TX_PWR_CONSTRAINT); 
		IPW_CMD(VAP_QUIET_INTERVALS); 
		IPW_CMD(VAP_CHANNEL_SWITCH); 
		IPW_CMD(VAP_MANDATORY_CHANNELS); 
		IPW_CMD(VAP_CELL_PWR_LIMIT); 
		IPW_CMD(VAP_CF_PARAM_SET); 
		IPW_CMD(VAP_SET_BEACONING_STATE); 
		IPW_CMD(MEASUREMENT); 
		IPW_CMD(POWER_CAPABILITY); 
		IPW_CMD(SUPPORTED_CHANNELS); 
		IPW_CMD(TPC_REPORT); 
		IPW_CMD(WME_INFO); 
		IPW_CMD(PRODUCTION_COMMAND); 
	default: 
		return "UNKNOWN";
	}
}
#endif /* CONFIG_IPW_DEBUG */

#define HOST_COMPLETE_TIMEOUT HZ
static int ipw_send_cmd(struct ipw_priv *priv, struct host_cmd *cmd)
{
	int rc = 0;

	if (priv->status & STATUS_HCMD_ACTIVE) {
		IPW_ERROR("Already sending a command\n");
		return -1;
	}

	priv->status |= STATUS_HCMD_ACTIVE;
	
	IPW_DEBUG_HC("Sending %s command (#%d), %d bytes\n", 
		     get_cmd_string(cmd->cmd), cmd->cmd, cmd->len);
	printk_buf(IPW_DL_HOST_COMMAND, (u8*)cmd->param, cmd->len);

	rc = ipw_queue_tx_hcmd(priv, cmd->cmd, &cmd->param, cmd->len, 0);
	if (rc)
		return rc;

	rc = wait_event_interruptible_timeout(
		priv->wait_command_queue, !(priv->status & STATUS_HCMD_ACTIVE),
		HOST_COMPLETE_TIMEOUT);
	if (rc == 0) {
		IPW_DEBUG_INFO("Command completion failed out after %dms.\n",
1173
			       jiffies_to_msecs(HOST_COMPLETE_TIMEOUT));
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		priv->status &= ~STATUS_HCMD_ACTIVE;
		return -EIO;
	}
	if (priv->status & STATUS_RF_KILL_MASK) {
		IPW_DEBUG_INFO("Command aborted due to RF Kill Switch\n");
		return -EIO;
	}

	return 0;
}

static int ipw_send_host_complete(struct ipw_priv *priv)
{
	struct host_cmd cmd = {
		.cmd = IPW_CMD_HOST_COMPLETE,
		.len = 0
	};

	if (!priv) {
		IPW_ERROR("Invalid args\n");
		return -1;
	}

	if (ipw_send_cmd(priv, &cmd)) {
		IPW_ERROR("failed to send HOST_COMPLETE command\n");
		return -1;
	}
	
	return 0;
}

static int ipw_send_system_config(struct ipw_priv *priv, 
				  struct ipw_sys_config *config)
{
	struct host_cmd cmd = {
		.cmd = IPW_CMD_SYSTEM_CONFIG,
		.len = sizeof(*config)
	};

	if (!priv || !config) {
		IPW_ERROR("Invalid args\n");
		return -1;
	}

	memcpy(&cmd.param,config,sizeof(*config));
	if (ipw_send_cmd(priv, &cmd)) {
		IPW_ERROR("failed to send SYSTEM_CONFIG command\n");
		return -1;
	}

	return 0;
}

static int ipw_send_ssid(struct ipw_priv *priv, u8 *ssid, int len)
{
	struct host_cmd cmd = {
		.cmd = IPW_CMD_SSID,
		.len = min(len, IW_ESSID_MAX_SIZE)
	};

	if (!priv || !ssid) {
		IPW_ERROR("Invalid args\n");
		return -1;
	}

	memcpy(&cmd.param, ssid, cmd.len);
	if (ipw_send_cmd(priv, &cmd)) {
		IPW_ERROR("failed to send SSID command\n");
		return -1;
	}
	
	return 0;
}

static int ipw_send_adapter_address(struct ipw_priv *priv, u8 *mac)
{
	struct host_cmd cmd = {
		.cmd = IPW_CMD_ADAPTER_ADDRESS,
		.len = ETH_ALEN
	};

	if (!priv || !mac) {
		IPW_ERROR("Invalid args\n");
		return -1;
	}

	IPW_DEBUG_INFO("%s: Setting MAC to " MAC_FMT "\n",
		       priv->net_dev->name, MAC_ARG(mac));

	memcpy(&cmd.param, mac, ETH_ALEN);

	if (ipw_send_cmd(priv, &cmd)) {
		IPW_ERROR("failed to send ADAPTER_ADDRESS command\n");
		return -1;
	}
	
	return 0;
}

static void ipw_adapter_restart(void *adapter)
{
	struct ipw_priv *priv = adapter;

	if (priv->status & STATUS_RF_KILL_MASK)
		return;

	ipw_down(priv);
	if (ipw_up(priv)) {
		IPW_ERROR("Failed to up device\n");
		return;
	}
}




#define IPW_SCAN_CHECK_WATCHDOG (5 * HZ)

static void ipw_scan_check(void *data)
{
	struct ipw_priv *priv = data;
	if (priv->status & (STATUS_SCANNING | STATUS_SCAN_ABORTING)) {
		IPW_DEBUG_SCAN("Scan completion watchdog resetting "
			       "adapter (%dms).\n", 
			       IPW_SCAN_CHECK_WATCHDOG / 100);
		ipw_adapter_restart(priv);
	}
}

static int ipw_send_scan_request_ext(struct ipw_priv *priv,
				     struct ipw_scan_request_ext *request)
{
	struct host_cmd cmd = {
		.cmd = IPW_CMD_SCAN_REQUEST_EXT,
		.len = sizeof(*request)
	};

	if (!priv || !request) {
		IPW_ERROR("Invalid args\n");
		return -1;
	}

	memcpy(&cmd.param,request,sizeof(*request));
	if (ipw_send_cmd(priv, &cmd)) {
		IPW_ERROR("failed to send SCAN_REQUEST_EXT command\n");
		return -1;
	}
	
	queue_delayed_work(priv->workqueue, &priv->scan_check, 
			   IPW_SCAN_CHECK_WATCHDOG);
	return 0;
}

static int ipw_send_scan_abort(struct ipw_priv *priv)
{
	struct host_cmd cmd = {
		.cmd = IPW_CMD_SCAN_ABORT,
		.len = 0
	};

	if (!priv) {
		IPW_ERROR("Invalid args\n");
		return -1;
	}

	if (ipw_send_cmd(priv, &cmd)) {
		IPW_ERROR("failed to send SCAN_ABORT command\n");
		return -1;
	}
	
	return 0;
}

static int ipw_set_sensitivity(struct ipw_priv *priv, u16 sens)
{
	struct host_cmd cmd = {
		.cmd = IPW_CMD_SENSITIVITY_CALIB,
		.len = sizeof(struct ipw_sensitivity_calib)
	};
	struct ipw_sensitivity_calib *calib = (struct ipw_sensitivity_calib *)
		&cmd.param;
	calib->beacon_rssi_raw = sens;
	if (ipw_send_cmd(priv, &cmd)) {
		IPW_ERROR("failed to send SENSITIVITY CALIB command\n");
		return -1;
	}

	return 0;
}

static int ipw_send_associate(struct ipw_priv *priv,
			      struct ipw_associate *associate)
{
	struct host_cmd cmd = {
		.cmd = IPW_CMD_ASSOCIATE,
		.len = sizeof(*associate)
	};

	if (!priv || !associate) {
		IPW_ERROR("Invalid args\n");
		return -1;
	}

	memcpy(&cmd.param,associate,sizeof(*associate));
	if (ipw_send_cmd(priv, &cmd)) {
		IPW_ERROR("failed to send ASSOCIATE command\n");
		return -1;
	}
	
	return 0;
}

static int ipw_send_supported_rates(struct ipw_priv *priv,
				    struct ipw_supported_rates *rates)
{
	struct host_cmd cmd = {
		.cmd = IPW_CMD_SUPPORTED_RATES,
		.len = sizeof(*rates)
	};

	if (!priv || !rates) {
		IPW_ERROR("Invalid args\n");
		return -1;
	}

	memcpy(&cmd.param,rates,sizeof(*rates));
	if (ipw_send_cmd(priv, &cmd)) {
		IPW_ERROR("failed to send SUPPORTED_RATES command\n");
		return -1;
	}
	
	return 0;
}

static int ipw_set_random_seed(struct ipw_priv *priv)
{
	struct host_cmd cmd = {
		.cmd = IPW_CMD_SEED_NUMBER,
		.len = sizeof(u32)
	};

	if (!priv) {
		IPW_ERROR("Invalid args\n");
		return -1;
	}

	get_random_bytes(&cmd.param, sizeof(u32));

	if (ipw_send_cmd(priv, &cmd)) {
		IPW_ERROR("failed to send SEED_NUMBER command\n");
		return -1;
	}
	
	return 0;
}

#if 0
static int ipw_send_card_disable(struct ipw_priv *priv, u32 phy_off)
{
	struct host_cmd cmd = {
		.cmd = IPW_CMD_CARD_DISABLE,
		.len = sizeof(u32)
	};

	if (!priv) {
		IPW_ERROR("Invalid args\n");
		return -1;
	}

	*((u32*)&cmd.param) = phy_off;

	if (ipw_send_cmd(priv, &cmd)) {
		IPW_ERROR("failed to send CARD_DISABLE command\n");
		return -1;
	}
	
	return 0;
}
#endif

static int ipw_send_tx_power(struct ipw_priv *priv,
			     struct ipw_tx_power *power)
{
	struct host_cmd cmd = {
		.cmd = IPW_CMD_TX_POWER,
		.len = sizeof(*power)
	};

	if (!priv || !power) {
		IPW_ERROR("Invalid args\n");
		return -1;
	}

	memcpy(&cmd.param,power,sizeof(*power));
	if (ipw_send_cmd(priv, &cmd)) {
		IPW_ERROR("failed to send TX_POWER command\n");
		return -1;
	}
	
	return 0;
}

static int ipw_send_rts_threshold(struct ipw_priv *priv, u16 rts)
{
	struct ipw_rts_threshold rts_threshold = {
		.rts_threshold = rts,
	};
	struct host_cmd cmd = {
		.cmd = IPW_CMD_RTS_THRESHOLD,
		.len = sizeof(rts_threshold)
	};

	if (!priv) {
		IPW_ERROR("Invalid args\n");
		return -1;
	}

	memcpy(&cmd.param, &rts_threshold, sizeof(rts_threshold));
	if (ipw_send_cmd(priv, &cmd)) {
		IPW_ERROR("failed to send RTS_THRESHOLD command\n");
		return -1;
	}

	return 0;
}

static int ipw_send_frag_threshold(struct ipw_priv *priv, u16 frag)
{
	struct ipw_frag_threshold frag_threshold = {
		.frag_threshold = frag,
	};
	struct host_cmd cmd = {
		.cmd = IPW_CMD_FRAG_THRESHOLD,
		.len = sizeof(frag_threshold)
	};

	if (!priv) {
		IPW_ERROR("Invalid args\n");
		return -1;
	}

	memcpy(&cmd.param, &frag_threshold, sizeof(frag_threshold));
	if (ipw_send_cmd(priv, &cmd)) {
		IPW_ERROR("failed to send FRAG_THRESHOLD command\n");
		return -1;
	}

	return 0;
}

static int ipw_send_power_mode(struct ipw_priv *priv, u32 mode)
{
	struct host_cmd cmd = {
		.cmd = IPW_CMD_POWER_MODE,
		.len = sizeof(u32)
	};
	u32 *param = (u32*)(&cmd.param);

	if (!priv) {
		IPW_ERROR("Invalid args\n");
		return -1;
	}
	
	/* If on battery, set to 3, if AC set to CAM, else user
	 * level */
	switch (mode) {
	case IPW_POWER_BATTERY:
		*param = IPW_POWER_INDEX_3;
		break;
	case IPW_POWER_AC:
		*param = IPW_POWER_MODE_CAM;
		break;
	default:
		*param = mode;
		break;
	}

	if (ipw_send_cmd(priv, &cmd)) {
		IPW_ERROR("failed to send POWER_MODE command\n");
		return -1;
	}

	return 0;
}

/*
 * The IPW device contains a Microwire compatible EEPROM that stores
 * various data like the MAC address.  Usually the firmware has exclusive
 * access to the eeprom, but during device initialization (before the
 * device driver has sent the HostComplete command to the firmware) the
 * device driver has read access to the EEPROM by way of indirect addressing
 * through a couple of memory mapped registers.
 *
 * The following is a simplified implementation for pulling data out of the
 * the eeprom, along with some helper functions to find information in
 * the per device private data's copy of the eeprom.
 *
 * NOTE: To better understand how these functions work (i.e what is a chip
 *       select and why do have to keep driving the eeprom clock?), read
 *       just about any data sheet for a Microwire compatible EEPROM.
 */

/* write a 32 bit value into the indirect accessor register */
static inline void eeprom_write_reg(struct ipw_priv *p, u32 data)
{
	ipw_write_reg32(p, FW_MEM_REG_EEPROM_ACCESS, data);
	
	/* the eeprom requires some time to complete the operation */
	udelay(p->eeprom_delay);

	return;
}

/* perform a chip select operation */
static inline void eeprom_cs(struct ipw_priv* priv)
{
	eeprom_write_reg(priv,0);
	eeprom_write_reg(priv,EEPROM_BIT_CS);
	eeprom_write_reg(priv,EEPROM_BIT_CS|EEPROM_BIT_SK);
	eeprom_write_reg(priv,EEPROM_BIT_CS);
}

/* perform a chip select operation */
static inline void eeprom_disable_cs(struct ipw_priv* priv)
{
	eeprom_write_reg(priv,EEPROM_BIT_CS);
	eeprom_write_reg(priv,0);
	eeprom_write_reg(priv,EEPROM_BIT_SK);
}

/* push a single bit down to the eeprom */
static inline void eeprom_write_bit(struct ipw_priv *p,u8 bit)
{
	int d = ( bit ? EEPROM_BIT_DI : 0);
	eeprom_write_reg(p,EEPROM_BIT_CS|d);
	eeprom_write_reg(p,EEPROM_BIT_CS|d|EEPROM_BIT_SK);
}

/* push an opcode followed by an address down to the eeprom */
static void eeprom_op(struct ipw_priv* priv, u8 op, u8 addr)
{
	int i;

	eeprom_cs(priv);
	eeprom_write_bit(priv,1);
	eeprom_write_bit(priv,op&2);
	eeprom_write_bit(priv,op&1);
	for ( i=7; i>=0; i-- ) {
		eeprom_write_bit(priv,addr&(1<<i));
	}
}

/* pull 16 bits off the eeprom, one bit at a time */
static u16 eeprom_read_u16(struct ipw_priv* priv, u8 addr)
{
	int i;
	u16 r=0;
	
	/* Send READ Opcode */
	eeprom_op(priv,EEPROM_CMD_READ,addr);

	/* Send dummy bit */
	eeprom_write_reg(priv,EEPROM_BIT_CS);

	/* Read the byte off the eeprom one bit at a time */
	for ( i=0; i<16; i++ ) {
		u32 data = 0;
		eeprom_write_reg(priv,EEPROM_BIT_CS|EEPROM_BIT_SK);
		eeprom_write_reg(priv,EEPROM_BIT_CS);
		data = ipw_read_reg32(priv,FW_MEM_REG_EEPROM_ACCESS);
		r = (r<<1) | ((data & EEPROM_BIT_DO)?1:0);
	}
	
	/* Send another dummy bit */
	eeprom_write_reg(priv,0);
	eeprom_disable_cs(priv);
	
	return r;
}

/* helper function for pulling the mac address out of the private */
/* data's copy of the eeprom data                                 */
static void eeprom_parse_mac(struct ipw_priv* priv, u8* mac)
{
	u8* ee = (u8*)priv->eeprom;
	memcpy(mac, &ee[EEPROM_MAC_ADDRESS], 6);
}

/*
 * Either the device driver (i.e. the host) or the firmware can
 * load eeprom data into the designated region in SRAM.  If neither
 * happens then the FW will shutdown with a fatal error.
 *
 * In order to signal the FW to load the EEPROM, the EEPROM_LOAD_DISABLE
 * bit needs region of shared SRAM needs to be non-zero.
 */
static void ipw_eeprom_init_sram(struct ipw_priv *priv)
{
	int i;
	u16 *eeprom = (u16 *)priv->eeprom;
  
	IPW_DEBUG_TRACE(">>\n");

	/* read entire contents of eeprom into private buffer */
	for ( i=0; i<128; i++ )
		eeprom[i] = eeprom_read_u16(priv,(u8)i);

	/* 
	   If the data looks correct, then copy it to our private 
	   copy.  Otherwise let the firmware know to perform the operation
	   on it's own
	*/
	if ((priv->eeprom + EEPROM_VERSION) != 0) {
		IPW_DEBUG_INFO("Writing EEPROM data into SRAM\n");

		/* write the eeprom data to sram */
		for( i=0; i<CX2_EEPROM_IMAGE_SIZE; i++ )
			ipw_write8(priv, IPW_EEPROM_DATA + i, 
				   priv->eeprom[i]);

		/* Do not load eeprom data on fatal error or suspend */
		ipw_write32(priv, IPW_EEPROM_LOAD_DISABLE, 0);
	} else {
		IPW_DEBUG_INFO("Enabling FW initializationg of SRAM\n");

		/* Load eeprom data on fatal error or suspend */
		ipw_write32(priv, IPW_EEPROM_LOAD_DISABLE, 1);
	}

	IPW_DEBUG_TRACE("<<\n");
}


static inline void ipw_zero_memory(struct ipw_priv *priv, u32 start, u32 count)
{
	count >>= 2;
	if (!count) return;
	_ipw_write32(priv, CX2_AUTOINC_ADDR, start);
	while (count--) 
		_ipw_write32(priv, CX2_AUTOINC_DATA, 0);
}

static inline void ipw_fw_dma_reset_command_blocks(struct ipw_priv *priv)
{
	ipw_zero_memory(priv, CX2_SHARED_SRAM_DMA_CONTROL,
			CB_NUMBER_OF_ELEMENTS_SMALL * 
			sizeof(struct command_block));
}

static int ipw_fw_dma_enable(struct ipw_priv *priv)
{ /* start dma engine but no transfers yet*/

	IPW_DEBUG_FW(">> : \n");
    
	/* Start the dma */
	ipw_fw_dma_reset_command_blocks(priv);
	
	/* Write CB base address */
	ipw_write_reg32(priv, CX2_DMA_I_CB_BASE, CX2_SHARED_SRAM_DMA_CONTROL);

	IPW_DEBUG_FW("<< : \n");
	return 0;
}

static void ipw_fw_dma_abort(struct ipw_priv *priv)
{
	u32 control = 0;

	IPW_DEBUG_FW(">> :\n");
    
	//set the Stop and Abort bit	
	control = DMA_CONTROL_SMALL_CB_CONST_VALUE | DMA_CB_STOP_AND_ABORT;
	ipw_write_reg32(priv, CX2_DMA_I_DMA_CONTROL, control);
	priv->sram_desc.last_cb_index = 0;
	
	IPW_DEBUG_FW("<< \n");
}

static int ipw_fw_dma_write_command_block(struct ipw_priv *priv, int index, struct command_block *cb)
{
	u32 address = CX2_SHARED_SRAM_DMA_CONTROL + (sizeof(struct command_block) * index); 
	IPW_DEBUG_FW(">> :\n");

1757
	ipw_write_indirect(priv, address, (u8*)cb, (int)sizeof(struct command_block));
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James Ketrenos 已提交
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	IPW_DEBUG_FW("<< :\n");
	return 0;

}

static int ipw_fw_dma_kick(struct ipw_priv *priv)
{
	u32 control = 0;
	u32 index=0;

	IPW_DEBUG_FW(">> :\n");
    
	for (index = 0; index < priv->sram_desc.last_cb_index; index++)
		ipw_fw_dma_write_command_block(priv, index, &priv->sram_desc.cb_list[index]);

	/* Enable the DMA in the CSR register */
	ipw_clear_bit(priv, CX2_RESET_REG,CX2_RESET_REG_MASTER_DISABLED | CX2_RESET_REG_STOP_MASTER);
	
        /* Set the Start bit. */
	control = DMA_CONTROL_SMALL_CB_CONST_VALUE | DMA_CB_START;
	ipw_write_reg32(priv, CX2_DMA_I_DMA_CONTROL, control);

	IPW_DEBUG_FW("<< :\n");
	return 0;
}

static void ipw_fw_dma_dump_command_block(struct ipw_priv *priv)
{
	u32 address;
	u32 register_value=0;
	u32 cb_fields_address=0;

	IPW_DEBUG_FW(">> :\n");
	address = ipw_read_reg32(priv,CX2_DMA_I_CURRENT_CB);
	IPW_DEBUG_FW_INFO("Current CB is 0x%x \n",address);

	/* Read the DMA Controlor register */
	register_value = ipw_read_reg32(priv, CX2_DMA_I_DMA_CONTROL);
	IPW_DEBUG_FW_INFO("CX2_DMA_I_DMA_CONTROL is 0x%x \n",register_value);

	/* Print the CB values*/
	cb_fields_address = address;
	register_value = ipw_read_reg32(priv, cb_fields_address);
	IPW_DEBUG_FW_INFO("Current CB ControlField is 0x%x \n",register_value);

	cb_fields_address += sizeof(u32);
	register_value = ipw_read_reg32(priv, cb_fields_address);
	IPW_DEBUG_FW_INFO("Current CB Source Field is 0x%x \n",register_value);

	cb_fields_address += sizeof(u32);
	register_value = ipw_read_reg32(priv, cb_fields_address);
	IPW_DEBUG_FW_INFO("Current CB Destination Field is 0x%x \n",
			  register_value);

	cb_fields_address += sizeof(u32);
	register_value = ipw_read_reg32(priv, cb_fields_address);
	IPW_DEBUG_FW_INFO("Current CB Status Field is 0x%x \n",register_value);

	IPW_DEBUG_FW(">> :\n");
}

static int ipw_fw_dma_command_block_index(struct ipw_priv *priv)
{
	u32 current_cb_address = 0;
	u32 current_cb_index = 0;

	IPW_DEBUG_FW("<< :\n");
	current_cb_address= ipw_read_reg32(priv, CX2_DMA_I_CURRENT_CB);
	
	current_cb_index = (current_cb_address - CX2_SHARED_SRAM_DMA_CONTROL )/
		sizeof (struct command_block);
	
	IPW_DEBUG_FW_INFO("Current CB index 0x%x address = 0x%X \n",
			  current_cb_index, current_cb_address );

	IPW_DEBUG_FW(">> :\n");
	return current_cb_index;

}

static int ipw_fw_dma_add_command_block(struct ipw_priv *priv,
					u32 src_address,
					u32 dest_address,
					u32 length,
					int interrupt_enabled,
					int is_last)
{

	u32 control = CB_VALID | CB_SRC_LE | CB_DEST_LE | CB_SRC_AUTOINC | 
		CB_SRC_IO_GATED | CB_DEST_AUTOINC | CB_SRC_SIZE_LONG | 
		CB_DEST_SIZE_LONG;
	struct command_block *cb;
	u32 last_cb_element=0;

	IPW_DEBUG_FW_INFO("src_address=0x%x dest_address=0x%x length=0x%x\n",
			  src_address, dest_address, length);

	if (priv->sram_desc.last_cb_index >= CB_NUMBER_OF_ELEMENTS_SMALL)
		return -1;

	last_cb_element = priv->sram_desc.last_cb_index;
	cb = &priv->sram_desc.cb_list[last_cb_element];
	priv->sram_desc.last_cb_index++;

	/* Calculate the new CB control word */
	if (interrupt_enabled )
		control |= CB_INT_ENABLED;

	if (is_last)
		control |= CB_LAST_VALID;
	
	control |= length;

	/* Calculate the CB Element's checksum value */
	cb->status = control ^src_address ^dest_address;

	/* Copy the Source and Destination addresses */
	cb->dest_addr = dest_address;
	cb->source_addr = src_address;

	/* Copy the Control Word last */
	cb->control = control;

	return 0;
}

static int ipw_fw_dma_add_buffer(struct ipw_priv *priv,
				 u32 src_phys,
				 u32 dest_address,
				 u32 length)
{
	u32 bytes_left = length;
	u32 src_offset=0;
	u32 dest_offset=0;
	int status = 0;
	IPW_DEBUG_FW(">> \n");
	IPW_DEBUG_FW_INFO("src_phys=0x%x dest_address=0x%x length=0x%x\n",
			  src_phys, dest_address, length);
	while (bytes_left > CB_MAX_LENGTH) {
		status = ipw_fw_dma_add_command_block( priv,
						       src_phys + src_offset,
						       dest_address + dest_offset,
						       CB_MAX_LENGTH, 0, 0);
		if (status) {
			IPW_DEBUG_FW_INFO(": Failed\n");
			return -1;
		} else 
			IPW_DEBUG_FW_INFO(": Added new cb\n");

		src_offset += CB_MAX_LENGTH;
		dest_offset += CB_MAX_LENGTH;
		bytes_left -= CB_MAX_LENGTH;
	}

	/* add the buffer tail */
	if (bytes_left > 0) {
		status = ipw_fw_dma_add_command_block(
			priv, src_phys + src_offset,
			dest_address + dest_offset,
			bytes_left, 0, 0);
		if (status) {
			IPW_DEBUG_FW_INFO(": Failed on the buffer tail\n");
			return -1;
		} else 
			IPW_DEBUG_FW_INFO(": Adding new cb - the buffer tail\n");
	}
	
	
	IPW_DEBUG_FW("<< \n");
	return 0;
}

static int ipw_fw_dma_wait(struct ipw_priv *priv)
{
	u32 current_index = 0;
	u32 watchdog = 0;

	IPW_DEBUG_FW(">> : \n");

	current_index = ipw_fw_dma_command_block_index(priv);
	IPW_DEBUG_FW_INFO("sram_desc.last_cb_index:0x%8X\n", 
			  (int) priv->sram_desc.last_cb_index);

	while (current_index < priv->sram_desc.last_cb_index) {
		udelay(50);
		current_index = ipw_fw_dma_command_block_index(priv);

		watchdog++;

		if (watchdog > 400) {
			IPW_DEBUG_FW_INFO("Timeout\n");
			ipw_fw_dma_dump_command_block(priv);
			ipw_fw_dma_abort(priv);
			return -1;
		}
	}

	ipw_fw_dma_abort(priv);

	/*Disable the DMA in the CSR register*/
 	ipw_set_bit(priv, CX2_RESET_REG, 
		    CX2_RESET_REG_MASTER_DISABLED | CX2_RESET_REG_STOP_MASTER);

	IPW_DEBUG_FW("<< dmaWaitSync \n");
	return 0;
}

static void ipw_remove_current_network(struct ipw_priv *priv) 
{
	struct list_head *element, *safe;
	struct ieee80211_network *network = NULL;	
	list_for_each_safe(element, safe, &priv->ieee->network_list) {
		network = list_entry(element, struct ieee80211_network, list);
		if (!memcmp(network->bssid, priv->bssid, ETH_ALEN)) {
			list_del(element);
			list_add_tail(&network->list, 
				      &priv->ieee->network_free_list);
		}
	}
}

/**
 * Check that card is still alive. 
 * Reads debug register from domain0.
 * If card is present, pre-defined value should
 * be found there.
 * 
 * @param priv
 * @return 1 if card is present, 0 otherwise
 */
static inline int ipw_alive(struct ipw_priv *priv)
{
	return ipw_read32(priv, 0x90) == 0xd55555d5;
}

static inline int ipw_poll_bit(struct ipw_priv *priv, u32 addr, u32 mask,
			       int timeout)
{
	int i = 0;

	do {
		if ((ipw_read32(priv, addr) & mask) == mask) 
			return i;
		mdelay(10);
		i += 10;
	} while (i < timeout);
	
	return -ETIME;
}

/* These functions load the firmware and micro code for the operation of 
 * the ipw hardware.  It assumes the buffer has all the bits for the
 * image and the caller is handling the memory allocation and clean up.
 */


static int ipw_stop_master(struct ipw_priv * priv)
{
	int rc;
	
	IPW_DEBUG_TRACE(">> \n");
	/* stop master. typical delay - 0 */
	ipw_set_bit(priv, CX2_RESET_REG, CX2_RESET_REG_STOP_MASTER);

	rc = ipw_poll_bit(priv, CX2_RESET_REG,
			  CX2_RESET_REG_MASTER_DISABLED, 100);
	if (rc < 0) {
		IPW_ERROR("stop master failed in 10ms\n");
		return -1;
	}

	IPW_DEBUG_INFO("stop master %dms\n", rc);

	return rc;
}

static void ipw_arc_release(struct ipw_priv *priv)
{
	IPW_DEBUG_TRACE(">> \n");
	mdelay(5);

	ipw_clear_bit(priv, CX2_RESET_REG, CBD_RESET_REG_PRINCETON_RESET);

	/* no one knows timing, for safety add some delay */
	mdelay(5);
}

struct fw_header {
	u32 version;
	u32 mode;
};

struct fw_chunk {
	u32 address;
	u32 length;
};

#define IPW_FW_MAJOR_VERSION 2
#define IPW_FW_MINOR_VERSION 2

#define IPW_FW_MINOR(x) ((x & 0xff) >> 8)
#define IPW_FW_MAJOR(x) (x & 0xff)

#define IPW_FW_VERSION ((IPW_FW_MINOR_VERSION << 8) | \
                         IPW_FW_MAJOR_VERSION)

#define IPW_FW_PREFIX "ipw-" __stringify(IPW_FW_MAJOR_VERSION) \
"." __stringify(IPW_FW_MINOR_VERSION) "-"

#if IPW_FW_MAJOR_VERSION >= 2 && IPW_FW_MINOR_VERSION > 0
#define IPW_FW_NAME(x) IPW_FW_PREFIX "" x ".fw"
#else
#define IPW_FW_NAME(x) "ipw2200_" x ".fw"
#endif

static int ipw_load_ucode(struct ipw_priv *priv, u8 * data,
			  size_t len)
{
	int rc = 0, i, addr;
	u8 cr = 0;
	u16 *image;

	image = (u16 *)data;
	
	IPW_DEBUG_TRACE(">> \n");

	rc = ipw_stop_master(priv);

	if (rc < 0)
		return rc;
	
//	spin_lock_irqsave(&priv->lock, flags);
	
	for (addr = CX2_SHARED_LOWER_BOUND;
	     addr < CX2_REGISTER_DOMAIN1_END; addr += 4) {
		ipw_write32(priv, addr, 0);
	}

	/* no ucode (yet) */
	memset(&priv->dino_alive, 0, sizeof(priv->dino_alive));
	/* destroy DMA queues */
	/* reset sequence */

	ipw_write_reg32(priv, CX2_MEM_HALT_AND_RESET ,CX2_BIT_HALT_RESET_ON);
	ipw_arc_release(priv);
	ipw_write_reg32(priv, CX2_MEM_HALT_AND_RESET, CX2_BIT_HALT_RESET_OFF);
	mdelay(1);

	/* reset PHY */
	ipw_write_reg32(priv, CX2_INTERNAL_CMD_EVENT, CX2_BASEBAND_POWER_DOWN);
	mdelay(1);
	
	ipw_write_reg32(priv, CX2_INTERNAL_CMD_EVENT, 0);
	mdelay(1);
	
	/* enable ucode store */
	ipw_write_reg8(priv, DINO_CONTROL_REG, 0x0);
	ipw_write_reg8(priv, DINO_CONTROL_REG, DINO_ENABLE_CS);
	mdelay(1);

	/* write ucode */
	/**
	 * @bug
	 * Do NOT set indirect address register once and then
	 * store data to indirect data register in the loop.
	 * It seems very reasonable, but in this case DINO do not
	 * accept ucode. It is essential to set address each time.
	 */
	/* load new ipw uCode */
	for (i = 0; i < len / 2; i++)
		ipw_write_reg16(priv, CX2_BASEBAND_CONTROL_STORE, image[i]);

	
	/* enable DINO */
	ipw_write_reg8(priv, CX2_BASEBAND_CONTROL_STATUS, 0);
	ipw_write_reg8(priv, CX2_BASEBAND_CONTROL_STATUS,
		       DINO_ENABLE_SYSTEM );

	/* this is where the igx / win driver deveates from the VAP driver.*/

	/* wait for alive response */
	for (i = 0; i < 100; i++) {
		/* poll for incoming data */
		cr = ipw_read_reg8(priv, CX2_BASEBAND_CONTROL_STATUS);
		if (cr & DINO_RXFIFO_DATA)
			break;
		mdelay(1);
	}

	if (cr & DINO_RXFIFO_DATA) {
		/* alive_command_responce size is NOT multiple of 4 */
		u32 response_buffer[(sizeof(priv->dino_alive) + 3) / 4];
		
		for (i = 0; i < ARRAY_SIZE(response_buffer); i++) 
			response_buffer[i] =
				ipw_read_reg32(priv, 
					       CX2_BASEBAND_RX_FIFO_READ);
		memcpy(&priv->dino_alive, response_buffer,
		       sizeof(priv->dino_alive));
		if (priv->dino_alive.alive_command == 1
		    && priv->dino_alive.ucode_valid == 1) {
			rc = 0;
			IPW_DEBUG_INFO(
				"Microcode OK, rev. %d (0x%x) dev. %d (0x%x) "
				"of %02d/%02d/%02d %02d:%02d\n",
				priv->dino_alive.software_revision,
				priv->dino_alive.software_revision,
				priv->dino_alive.device_identifier,
				priv->dino_alive.device_identifier,
				priv->dino_alive.time_stamp[0],
				priv->dino_alive.time_stamp[1],
				priv->dino_alive.time_stamp[2],
				priv->dino_alive.time_stamp[3],
				priv->dino_alive.time_stamp[4]);
		} else {
			IPW_DEBUG_INFO("Microcode is not alive\n");
			rc = -EINVAL;
		}
	} else {
		IPW_DEBUG_INFO("No alive response from DINO\n");
		rc = -ETIME;
	}

	/* disable DINO, otherwise for some reason
	   firmware have problem getting alive resp. */
	ipw_write_reg8(priv, CX2_BASEBAND_CONTROL_STATUS, 0);

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

	return rc;
}

static int ipw_load_firmware(struct ipw_priv *priv, u8 * data,
			     size_t len)
{
	int rc = -1;
	int offset = 0;
	struct fw_chunk *chunk;
	dma_addr_t shared_phys;
	u8 *shared_virt;

	IPW_DEBUG_TRACE("<< : \n");
	shared_virt = pci_alloc_consistent(priv->pci_dev, len, &shared_phys);

	if (!shared_virt)
		return -ENOMEM;

	memmove(shared_virt, data, len);

	/* Start the Dma */
	rc = ipw_fw_dma_enable(priv);

	if (priv->sram_desc.last_cb_index > 0) {
		/* the DMA is already ready this would be a bug. */
		BUG();
		goto out;
	}

	do {
		chunk = (struct fw_chunk *)(data + offset);
		offset += sizeof(struct fw_chunk);
		/* build DMA packet and queue up for sending */
		/* dma to chunk->address, the chunk->length bytes from data + 
		 * offeset*/
		/* Dma loading */
		rc = ipw_fw_dma_add_buffer(priv, shared_phys + offset,
					   chunk->address, chunk->length);
		if (rc) {
			IPW_DEBUG_INFO("dmaAddBuffer Failed\n");
			goto out;
		}
		
		offset += chunk->length;
	} while (offset < len);

	/* Run the DMA and wait for the answer*/
	rc = ipw_fw_dma_kick(priv);
	if (rc) {
		IPW_ERROR("dmaKick Failed\n");
		goto out;
	}

	rc = ipw_fw_dma_wait(priv);
	if (rc) {
		IPW_ERROR("dmaWaitSync Failed\n");
		goto out;
	}
 out:
	pci_free_consistent( priv->pci_dev, len, shared_virt, shared_phys);
	return rc;
}

/* stop nic */
static int ipw_stop_nic(struct ipw_priv *priv)
{
	int rc = 0;

	/* stop*/
	ipw_write32(priv, CX2_RESET_REG, CX2_RESET_REG_STOP_MASTER);
	
	rc = ipw_poll_bit(priv, CX2_RESET_REG, 
			  CX2_RESET_REG_MASTER_DISABLED, 500); 
	if (rc < 0) {
		IPW_ERROR("wait for reg master disabled failed\n");
		return rc;
	}   

	ipw_set_bit(priv, CX2_RESET_REG, CBD_RESET_REG_PRINCETON_RESET);
	
	return rc;
}

static void ipw_start_nic(struct ipw_priv *priv)
{
	IPW_DEBUG_TRACE(">>\n");

	/* prvHwStartNic  release ARC*/
	ipw_clear_bit(priv, CX2_RESET_REG,
		      CX2_RESET_REG_MASTER_DISABLED | 
		      CX2_RESET_REG_STOP_MASTER | 
		      CBD_RESET_REG_PRINCETON_RESET);
	
	/* enable power management */
	ipw_set_bit(priv, CX2_GP_CNTRL_RW, CX2_GP_CNTRL_BIT_HOST_ALLOWS_STANDBY);

	IPW_DEBUG_TRACE("<<\n");
}
	
static int ipw_init_nic(struct ipw_priv *priv)
{
	int rc;

	IPW_DEBUG_TRACE(">>\n");
	/* reset */	
	/*prvHwInitNic */
	/* set "initialization complete" bit to move adapter to D0 state */
	ipw_set_bit(priv, CX2_GP_CNTRL_RW, CX2_GP_CNTRL_BIT_INIT_DONE);

	/* low-level PLL activation */
	ipw_write32(priv, CX2_READ_INT_REGISTER,  CX2_BIT_INT_HOST_SRAM_READ_INT_REGISTER);

	/* wait for clock stabilization */
	rc = ipw_poll_bit(priv, CX2_GP_CNTRL_RW, 
			  CX2_GP_CNTRL_BIT_CLOCK_READY, 250); 
	if (rc < 0 )
		IPW_DEBUG_INFO("FAILED wait for clock stablization\n");

	/* assert SW reset */
	ipw_set_bit(priv, CX2_RESET_REG, CX2_RESET_REG_SW_RESET);

	udelay(10);

	/* set "initialization complete" bit to move adapter to D0 state */
	ipw_set_bit(priv, CX2_GP_CNTRL_RW, CX2_GP_CNTRL_BIT_INIT_DONE);

	IPW_DEBUG_TRACE(">>\n");
	return 0;
}


/* Call this function from process context, it will sleep in request_firmware. 
 * Probe is an ok place to call this from.
 */
static int ipw_reset_nic(struct ipw_priv *priv)
{
	int rc = 0;

	IPW_DEBUG_TRACE(">>\n");
	
	rc = ipw_init_nic(priv);
	
	/* Clear the 'host command active' bit... */
	priv->status &= ~STATUS_HCMD_ACTIVE;
	wake_up_interruptible(&priv->wait_command_queue);

	IPW_DEBUG_TRACE("<<\n");
	return rc;
} 

static int ipw_get_fw(struct ipw_priv *priv, 
		      const struct firmware **fw, const char *name)
{
	struct fw_header *header;
	int rc;

	/* ask firmware_class module to get the boot firmware off disk */
	rc = request_firmware(fw, name, &priv->pci_dev->dev);
	if (rc < 0) {
		IPW_ERROR("%s load failed: Reason %d\n", name, rc);
		return rc;
	} 

	header = (struct fw_header *)(*fw)->data;
	if (IPW_FW_MAJOR(header->version) != IPW_FW_MAJOR_VERSION) {
		IPW_ERROR("'%s' firmware version not compatible (%d != %d)\n",
			  name,
			  IPW_FW_MAJOR(header->version), IPW_FW_MAJOR_VERSION);
		return -EINVAL;
	}

2359
	IPW_DEBUG_INFO("Loading firmware '%s' file v%d.%d (%zd bytes)\n",
J
James Ketrenos 已提交
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		       name,
		       IPW_FW_MAJOR(header->version),
		       IPW_FW_MINOR(header->version),
		       (*fw)->size - sizeof(struct fw_header));
	return 0;
}

#define CX2_RX_BUF_SIZE (3000)

static inline void ipw_rx_queue_reset(struct ipw_priv *priv,
				      struct ipw_rx_queue *rxq)
{
	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,
					 CX2_RX_BUF_SIZE,
					 PCI_DMA_FROMDEVICE);
			dev_kfree_skb(rxq->pool[i].skb);
		}
		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->processed = RX_QUEUE_SIZE - 1;
	rxq->free_count = 0;
	spin_unlock_irqrestore(&rxq->lock, flags);
}

#ifdef CONFIG_PM
static int fw_loaded = 0;
static const struct firmware *bootfw = NULL;
static const struct firmware *firmware = NULL;
static const struct firmware *ucode = NULL;
#endif

static int ipw_load(struct ipw_priv *priv)
{
#ifndef CONFIG_PM
	const struct firmware *bootfw = NULL;
	const struct firmware *firmware = NULL;
	const struct firmware *ucode = NULL;
#endif
	int rc = 0, retries = 3;

#ifdef CONFIG_PM
	if (!fw_loaded) {
#endif
		rc = ipw_get_fw(priv, &bootfw, IPW_FW_NAME("boot"));
		if (rc) 
			goto error;
		
		switch (priv->ieee->iw_mode) {
		case IW_MODE_ADHOC:
			rc = ipw_get_fw(priv, &ucode, 
					IPW_FW_NAME("ibss_ucode"));
			if (rc) 
				goto error;
		
			rc = ipw_get_fw(priv, &firmware, IPW_FW_NAME("ibss"));
			break;
			
#ifdef CONFIG_IPW_PROMISC
		case IW_MODE_MONITOR:
			rc = ipw_get_fw(priv, &ucode, 
					IPW_FW_NAME("ibss_ucode"));
			if (rc) 
				goto error;
		
			rc = ipw_get_fw(priv, &firmware, IPW_FW_NAME("sniffer"));
			break;
#endif
		case IW_MODE_INFRA:
			rc = ipw_get_fw(priv, &ucode, 
					IPW_FW_NAME("bss_ucode"));
			if (rc) 
				goto error;
		
			rc = ipw_get_fw(priv, &firmware, IPW_FW_NAME("bss"));
			break;
			
		default:
			rc = -EINVAL;
		}

		if (rc) 
			goto error;

#ifdef CONFIG_PM
		fw_loaded = 1;
	}
#endif

	if (!priv->rxq)
		priv->rxq = ipw_rx_queue_alloc(priv);
	else
		ipw_rx_queue_reset(priv, priv->rxq);
	if (!priv->rxq) {
		IPW_ERROR("Unable to initialize Rx queue\n");
		goto error;
	}

 retry:
	/* Ensure interrupts are disabled */
	ipw_write32(priv, CX2_INTA_MASK_R, ~CX2_INTA_MASK_ALL);
	priv->status &= ~STATUS_INT_ENABLED;

	/* ack pending interrupts */
	ipw_write32(priv, CX2_INTA_RW, CX2_INTA_MASK_ALL);
	
	ipw_stop_nic(priv);

	rc = ipw_reset_nic(priv);
	if (rc) {
		IPW_ERROR("Unable to reset NIC\n");
		goto error;
	}

	ipw_zero_memory(priv, CX2_NIC_SRAM_LOWER_BOUND, 
			CX2_NIC_SRAM_UPPER_BOUND - CX2_NIC_SRAM_LOWER_BOUND);

	/* DMA the initial boot firmware into the device */
	rc = ipw_load_firmware(priv, bootfw->data + sizeof(struct fw_header), 
			       bootfw->size - sizeof(struct fw_header));
	if (rc < 0) {
		IPW_ERROR("Unable to load boot firmware\n");
		goto error;
	}

	/* kick start the device */
	ipw_start_nic(priv);

	/* wait for the device to finish it's initial startup sequence */
	rc = ipw_poll_bit(priv, CX2_INTA_RW, 
			  CX2_INTA_BIT_FW_INITIALIZATION_DONE, 500); 
	if (rc < 0) {
		IPW_ERROR("device failed to boot initial fw image\n");
		goto error;
	}
	IPW_DEBUG_INFO("initial device response after %dms\n", rc);

	/* ack fw init done interrupt */	
	ipw_write32(priv, CX2_INTA_RW, CX2_INTA_BIT_FW_INITIALIZATION_DONE);

	/* DMA the ucode into the device */
	rc = ipw_load_ucode(priv, ucode->data + sizeof(struct fw_header), 
			    ucode->size - sizeof(struct fw_header));
	if (rc < 0) {
		IPW_ERROR("Unable to load ucode\n");
		goto error;
	}
	
	/* stop nic */
	ipw_stop_nic(priv);

	/* DMA bss firmware into the device */
	rc = ipw_load_firmware(priv, firmware->data + 
			       sizeof(struct fw_header), 
			       firmware->size - sizeof(struct fw_header));
	if (rc < 0 ) {
		IPW_ERROR("Unable to load firmware\n");
		goto error;
	}

	ipw_write32(priv, IPW_EEPROM_LOAD_DISABLE, 0);

	rc = ipw_queue_reset(priv);
	if (rc) {
		IPW_ERROR("Unable to initialize queues\n");
		goto error;
	}

	/* Ensure interrupts are disabled */
	ipw_write32(priv, CX2_INTA_MASK_R, ~CX2_INTA_MASK_ALL);
	
	/* kick start the device */
	ipw_start_nic(priv);

	if (ipw_read32(priv, CX2_INTA_RW) & CX2_INTA_BIT_PARITY_ERROR) {
		if (retries > 0) {
			IPW_WARNING("Parity error.  Retrying init.\n");
			retries--;
			goto retry;
		}

		IPW_ERROR("TODO: Handle parity error -- schedule restart?\n");
		rc = -EIO;
		goto error;
	}

	/* wait for the device */
	rc = ipw_poll_bit(priv, CX2_INTA_RW, 
			  CX2_INTA_BIT_FW_INITIALIZATION_DONE, 500); 
	if (rc < 0) {
		IPW_ERROR("device failed to start after 500ms\n");
		goto error;
	}
	IPW_DEBUG_INFO("device response after %dms\n", rc);

	/* ack fw init done interrupt */
	ipw_write32(priv, CX2_INTA_RW, CX2_INTA_BIT_FW_INITIALIZATION_DONE);

	/* read eeprom data and initialize the eeprom region of sram */
	priv->eeprom_delay = 1;
	ipw_eeprom_init_sram(priv);	

	/* enable interrupts */
	ipw_enable_interrupts(priv);

	/* Ensure our queue has valid packets */
	ipw_rx_queue_replenish(priv);

	ipw_write32(priv, CX2_RX_READ_INDEX, priv->rxq->read);

	/* ack pending interrupts */
	ipw_write32(priv, CX2_INTA_RW, CX2_INTA_MASK_ALL);

#ifndef CONFIG_PM
	release_firmware(bootfw);
	release_firmware(ucode);
	release_firmware(firmware);
#endif
	return 0;

 error:
	if (priv->rxq) {
		ipw_rx_queue_free(priv, priv->rxq);
		priv->rxq = NULL;
	}
	ipw_tx_queue_free(priv);
	if (bootfw)
		release_firmware(bootfw);
	if (ucode)
		release_firmware(ucode);
	if (firmware)
		release_firmware(firmware);
#ifdef CONFIG_PM
	fw_loaded = 0;
	bootfw = ucode = firmware = NULL;
#endif

	return rc;
}

/** 
 * DMA services
 *
 * Theory of operation
 *
 * A queue is a circular buffers with 'Read' and 'Write' pointers.
 * 2 empty entries always kept in the buffer to protect from overflow.
 *
 * 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.
 *
 * The IPW operates with six queues, one receive queue in the device's
 * sram, one transmit queue for sending commands to the device firmware,
 * and four transmit queues for data.  
 *
 * The four transmit queues allow for performing quality of service (qos) 
 * transmissions as per the 802.11 protocol.  Currently Linux does not
 * provide a mechanism to the user for utilizing prioritized queues, so 
 * we only utilize the first data transmit queue (queue1).
 */

/**
 * Driver allocates buffers of this size for Rx
 */

static inline int ipw_queue_space(const struct clx2_queue *q)
{
	int s = q->last_used - q->first_empty;
	if (s <= 0)
		s += q->n_bd;
	s -= 2;			/* keep some reserve to not confuse empty and full situations */
	if (s < 0)
		s = 0;
	return s;
}

static inline int ipw_queue_inc_wrap(int index, int n_bd)
{
	return (++index == n_bd) ? 0 : index;
}

/**
 * Initialize common DMA queue structure
 * 
 * @param q                queue to init
 * @param count            Number of BD's to allocate. Should be power of 2
 * @param read_register    Address for 'read' register
 *                         (not offset within BAR, full address)
 * @param write_register   Address for 'write' register
 *                         (not offset within BAR, full address)
 * @param base_register    Address for 'base' register
 *                         (not offset within BAR, full address)
 * @param size             Address for 'size' register
 *                         (not offset within BAR, full address)
 */
static void ipw_queue_init(struct ipw_priv *priv, struct clx2_queue *q, 
			   int count, u32 read, u32 write,
			   u32 base, u32 size)
{
	q->n_bd = count;

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

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

	q->first_empty = q->last_used = 0;
	q->reg_r = read;
	q->reg_w = write;

	ipw_write32(priv, base, q->dma_addr);
	ipw_write32(priv, size, count);
	ipw_write32(priv, read, 0);
	ipw_write32(priv, write, 0);

	_ipw_read32(priv, 0x90);
}

static int ipw_queue_tx_init(struct ipw_priv *priv, 
			     struct clx2_tx_queue *q,
			     int count, u32 read, u32 write,
			     u32 base, u32 size)
{
	struct pci_dev *dev = priv->pci_dev;

	q->txb = kmalloc(sizeof(q->txb[0]) * count, GFP_KERNEL);
	if (!q->txb) {
		IPW_ERROR("vmalloc for auxilary BD structures failed\n");
		return -ENOMEM;
	}

	q->bd = pci_alloc_consistent(dev,sizeof(q->bd[0])*count, &q->q.dma_addr);
	if (!q->bd) {
2714
		IPW_ERROR("pci_alloc_consistent(%zd) failed\n",
J
James Ketrenos 已提交
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				sizeof(q->bd[0]) * count);
		kfree(q->txb);
		q->txb = NULL;
		return -ENOMEM;
	}

	ipw_queue_init(priv, &q->q, count, read, write, base, size);
	return 0;
}

/**
 * Free one TFD, those at index [txq->q.last_used].
 * Do NOT advance any indexes
 * 
 * @param dev
 * @param txq
 */
static void ipw_queue_tx_free_tfd(struct ipw_priv *priv,
				  struct clx2_tx_queue *txq)
{
	struct tfd_frame *bd = &txq->bd[txq->q.last_used];
	struct pci_dev *dev = priv->pci_dev;
	int i;
	
	/* classify bd */
	if (bd->control_flags.message_type == TX_HOST_COMMAND_TYPE)
		/* nothing to cleanup after for host commands */
		return;

	/* sanity check */
	if (bd->u.data.num_chunks > NUM_TFD_CHUNKS) {
		IPW_ERROR("Too many chunks: %i\n", bd->u.data.num_chunks);
		/** @todo issue fatal error, it is quite serious situation */
		return;
	}

	/* unmap chunks if any */
	for (i = 0; i < bd->u.data.num_chunks; i++) {
		pci_unmap_single(dev, bd->u.data.chunk_ptr[i],
				 bd->u.data.chunk_len[i], PCI_DMA_TODEVICE);
		if (txq->txb[txq->q.last_used]) {
			ieee80211_txb_free(txq->txb[txq->q.last_used]);
			txq->txb[txq->q.last_used] = NULL;
		}
	}
}

/**
 * Deallocate DMA queue.
 * 
 * Empty queue by removing and destroying all BD's.
 * Free all buffers.
 * 
 * @param dev
 * @param q
 */
static void ipw_queue_tx_free(struct ipw_priv *priv,
			    struct clx2_tx_queue *txq)
{
	struct clx2_queue *q = &txq->q;
	struct pci_dev *dev = priv->pci_dev;

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

	/* first, empty all BD's */
	for (; q->first_empty != q->last_used;
	     q->last_used = ipw_queue_inc_wrap(q->last_used, q->n_bd)) {
		ipw_queue_tx_free_tfd(priv, txq);
	}
	
	/* free buffers belonging to queue itself */
	pci_free_consistent(dev, sizeof(txq->bd[0])*q->n_bd, txq->bd, 
			    q->dma_addr);
	kfree(txq->txb);

	/* 0 fill whole structure */
	memset(txq, 0, sizeof(*txq));
}


/**
 * Destroy all DMA queues and structures
 * 
 * @param priv
 */
static void ipw_tx_queue_free(struct ipw_priv *priv)
{
	/* Tx CMD queue */
	ipw_queue_tx_free(priv, &priv->txq_cmd);

	/* Tx queues */
	ipw_queue_tx_free(priv, &priv->txq[0]);
	ipw_queue_tx_free(priv, &priv->txq[1]);
	ipw_queue_tx_free(priv, &priv->txq[2]);
	ipw_queue_tx_free(priv, &priv->txq[3]);
}

static void inline __maybe_wake_tx(struct ipw_priv *priv)
{
	if (netif_running(priv->net_dev)) {
		switch (priv->port_type) {
		case DCR_TYPE_MU_BSS:
		case DCR_TYPE_MU_IBSS:
			if (!(priv->status & STATUS_ASSOCIATED)) {
				return;
			}
		}
		netif_wake_queue(priv->net_dev);
	}

}

static inline void ipw_create_bssid(struct ipw_priv *priv, u8 *bssid)
{
	/* First 3 bytes are manufacturer */
	bssid[0] = priv->mac_addr[0];
	bssid[1] = priv->mac_addr[1];
	bssid[2] = priv->mac_addr[2];

	/* Last bytes are random */
        get_random_bytes(&bssid[3], ETH_ALEN-3);

        bssid[0] &= 0xfe;       /* clear multicast bit */
        bssid[0] |= 0x02;       /* set local assignment bit (IEEE802) */
}

static inline u8 ipw_add_station(struct ipw_priv *priv, u8 *bssid)
{
	struct ipw_station_entry entry;
	int i;

	for (i = 0; i < priv->num_stations; i++) {
		if (!memcmp(priv->stations[i], bssid, ETH_ALEN)) {
			/* Another node is active in network */
			priv->missed_adhoc_beacons = 0;
			if (!(priv->config & CFG_STATIC_CHANNEL))
				/* when other nodes drop out, we drop out */
				priv->config &= ~CFG_ADHOC_PERSIST;

			return i;
		}
	}

	if (i == MAX_STATIONS)
		return IPW_INVALID_STATION;

	IPW_DEBUG_SCAN("Adding AdHoc station: " MAC_FMT "\n", MAC_ARG(bssid));

	entry.reserved = 0;
	entry.support_mode = 0;
	memcpy(entry.mac_addr, bssid, ETH_ALEN);
	memcpy(priv->stations[i], bssid, ETH_ALEN);
	ipw_write_direct(priv, IPW_STATION_TABLE_LOWER + i * sizeof(entry),
			 &entry,
			 sizeof(entry));
	priv->num_stations++;

	return i;
}

static inline u8 ipw_find_station(struct ipw_priv *priv, u8 *bssid)
{
	int i;

	for (i = 0; i < priv->num_stations; i++) 
		if (!memcmp(priv->stations[i], bssid, ETH_ALEN)) 
			return i;

	return IPW_INVALID_STATION;
}

static void ipw_send_disassociate(struct ipw_priv *priv, int quiet)
{
	int err;

	if (!(priv->status & (STATUS_ASSOCIATING | STATUS_ASSOCIATED))) {
		IPW_DEBUG_ASSOC("Disassociating while not associated.\n");
		return;
	}

	IPW_DEBUG_ASSOC("Disassocation attempt from " MAC_FMT " "
			"on channel %d.\n",
			MAC_ARG(priv->assoc_request.bssid), 
			priv->assoc_request.channel);

	priv->status &= ~(STATUS_ASSOCIATING | STATUS_ASSOCIATED);
	priv->status |= STATUS_DISASSOCIATING;

	if (quiet)
		priv->assoc_request.assoc_type = HC_DISASSOC_QUIET;
	else
		priv->assoc_request.assoc_type = HC_DISASSOCIATE;
	err = ipw_send_associate(priv, &priv->assoc_request);
	if (err) {
		IPW_DEBUG_HC("Attempt to send [dis]associate command "
			     "failed.\n");
		return;
	}

}

static void ipw_disassociate(void *data)
{
	ipw_send_disassociate(data, 0);
}

static void notify_wx_assoc_event(struct ipw_priv *priv)
{
	union iwreq_data wrqu;
	wrqu.ap_addr.sa_family = ARPHRD_ETHER;
	if (priv->status & STATUS_ASSOCIATED)
		memcpy(wrqu.ap_addr.sa_data, priv->bssid, ETH_ALEN);
	else
		memset(wrqu.ap_addr.sa_data, 0, ETH_ALEN);
	wireless_send_event(priv->net_dev, SIOCGIWAP, &wrqu, NULL);
}

struct ipw_status_code {
	u16 status;
	const char *reason;
};

static const struct ipw_status_code ipw_status_codes[] = {
	{0x00, "Successful"},
	{0x01, "Unspecified failure"},
	{0x0A, "Cannot support all requested capabilities in the "
	 "Capability information field"},
	{0x0B, "Reassociation denied due to inability to confirm that "
	 "association exists"},
	{0x0C, "Association denied due to reason outside the scope of this "
	 "standard"},
	{0x0D, "Responding station does not support the specified authentication "
	 "algorithm"},
	{0x0E, "Received an Authentication frame with authentication sequence "
	 "transaction sequence number out of expected sequence"},
	{0x0F, "Authentication rejected because of challenge failure"},
	{0x10, "Authentication rejected due to timeout waiting for next "
	 "frame in sequence"},
	{0x11, "Association denied because AP is unable to handle additional "
	 "associated stations"},
	{0x12, "Association denied due to requesting station not supporting all "
	 "of the datarates in the BSSBasicServiceSet Parameter"},
	{0x13, "Association denied due to requesting station not supporting "
	 "short preamble operation"},
	{0x14, "Association denied due to requesting station not supporting "
	 "PBCC encoding"},
	{0x15, "Association denied due to requesting station not supporting "
	 "channel agility"},
	{0x19, "Association denied due to requesting station not supporting "
	 "short slot operation"},
	{0x1A, "Association denied due to requesting station not supporting "
	 "DSSS-OFDM operation"},
	{0x28, "Invalid Information Element"},
	{0x29, "Group Cipher is not valid"},
	{0x2A, "Pairwise Cipher is not valid"},
	{0x2B, "AKMP is not valid"},
	{0x2C, "Unsupported RSN IE version"},
	{0x2D, "Invalid RSN IE Capabilities"},
	{0x2E, "Cipher suite is rejected per security policy"},
};

#ifdef CONFIG_IPW_DEBUG
static const char *ipw_get_status_code(u16 status) 
{
	int i;
	for (i = 0; i < ARRAY_SIZE(ipw_status_codes); i++) 
		if (ipw_status_codes[i].status == status)
			return ipw_status_codes[i].reason;
	return "Unknown status value.";
}
#endif

static void inline average_init(struct average *avg)
{
	memset(avg, 0, sizeof(*avg));
}

static void inline average_add(struct average *avg, s16 val)
{
	avg->sum -= avg->entries[avg->pos];
	avg->sum += val;
	avg->entries[avg->pos++] = val;
	if (unlikely(avg->pos == AVG_ENTRIES)) {
		avg->init = 1;
		avg->pos = 0;
	}
}

static s16 inline average_value(struct average *avg)
{
	if (!unlikely(avg->init)) {
		if (avg->pos)
			return avg->sum / avg->pos;
		return 0;
	}

	return avg->sum / AVG_ENTRIES;
}

static void ipw_reset_stats(struct ipw_priv *priv)
{
	u32 len = sizeof(u32);

	priv->quality = 0;

	average_init(&priv->average_missed_beacons);
	average_init(&priv->average_rssi);
	average_init(&priv->average_noise);

	priv->last_rate = 0;
	priv->last_missed_beacons = 0;
	priv->last_rx_packets = 0;
	priv->last_tx_packets = 0;
	priv->last_tx_failures = 0;
	
	/* Firmware managed, reset only when NIC is restarted, so we have to
	 * normalize on the current value */
	ipw_get_ordinal(priv, IPW_ORD_STAT_RX_ERR_CRC, 
			&priv->last_rx_err, &len);
	ipw_get_ordinal(priv, IPW_ORD_STAT_TX_FAILURE, 
			&priv->last_tx_failures, &len);

	/* Driver managed, reset with each association */
	priv->missed_adhoc_beacons = 0;
	priv->missed_beacons = 0;
	priv->tx_packets = 0;
	priv->rx_packets = 0;

}


static inline u32 ipw_get_max_rate(struct ipw_priv *priv)
{
	u32 i = 0x80000000;
	u32 mask = priv->rates_mask;
	/* If currently associated in B mode, restrict the maximum
	 * rate match to B rates */
	if (priv->assoc_request.ieee_mode == IPW_B_MODE)
		mask &= IEEE80211_CCK_RATES_MASK;

	/* TODO: Verify that the rate is supported by the current rates
	 * list. */

	while (i && !(mask & i)) i >>= 1;
	switch (i) {
	case IEEE80211_CCK_RATE_1MB_MASK: return 1000000;
	case IEEE80211_CCK_RATE_2MB_MASK: return 2000000;
	case IEEE80211_CCK_RATE_5MB_MASK: return 5500000;
	case IEEE80211_OFDM_RATE_6MB_MASK: return 6000000;
	case IEEE80211_OFDM_RATE_9MB_MASK: return 9000000;
	case IEEE80211_CCK_RATE_11MB_MASK: return 11000000;
	case IEEE80211_OFDM_RATE_12MB_MASK: return 12000000;
	case IEEE80211_OFDM_RATE_18MB_MASK: return 18000000;
	case IEEE80211_OFDM_RATE_24MB_MASK: return 24000000;
	case IEEE80211_OFDM_RATE_36MB_MASK: return 36000000;
	case IEEE80211_OFDM_RATE_48MB_MASK: return 48000000;
	case IEEE80211_OFDM_RATE_54MB_MASK: return 54000000;
	}

	if (priv->ieee->mode == IEEE_B) 
		return 11000000;
	else
		return 54000000;
}

static u32 ipw_get_current_rate(struct ipw_priv *priv)
{
	u32 rate, len = sizeof(rate);
	int err;

	if (!(priv->status & STATUS_ASSOCIATED)) 
		return 0;

	if (priv->tx_packets > IPW_REAL_RATE_RX_PACKET_THRESHOLD) {
		err = ipw_get_ordinal(priv, IPW_ORD_STAT_TX_CURR_RATE, &rate, 
				      &len);
		if (err) {
			IPW_DEBUG_INFO("failed querying ordinals.\n");
			return 0;
		}
	} else 
		return ipw_get_max_rate(priv);

	switch (rate) {
	case IPW_TX_RATE_1MB:  return  1000000; 
	case IPW_TX_RATE_2MB:  return  2000000; 
	case IPW_TX_RATE_5MB:  return  5500000; 
	case IPW_TX_RATE_6MB:  return  6000000; 
	case IPW_TX_RATE_9MB:  return  9000000; 
	case IPW_TX_RATE_11MB: return 11000000; 
	case IPW_TX_RATE_12MB: return 12000000; 
	case IPW_TX_RATE_18MB: return 18000000; 
	case IPW_TX_RATE_24MB: return 24000000; 
	case IPW_TX_RATE_36MB: return 36000000; 
	case IPW_TX_RATE_48MB: return 48000000; 
	case IPW_TX_RATE_54MB: return 54000000; 
	}

	return 0;
}

#define PERFECT_RSSI (-50)
#define WORST_RSSI   (-85)
#define IPW_STATS_INTERVAL (2 * HZ)
static void ipw_gather_stats(struct ipw_priv *priv)
{
	u32 rx_err, rx_err_delta, rx_packets_delta;
	u32 tx_failures, tx_failures_delta, tx_packets_delta;
	u32 missed_beacons_percent, missed_beacons_delta;
	u32 quality = 0;
	u32 len = sizeof(u32);
	s16 rssi;
	u32 beacon_quality, signal_quality, tx_quality, rx_quality, 
		rate_quality;

	if (!(priv->status & STATUS_ASSOCIATED)) {
		priv->quality = 0;
		return;
	}

	/* Update the statistics */
	ipw_get_ordinal(priv, IPW_ORD_STAT_MISSED_BEACONS, 
			&priv->missed_beacons, &len);
	missed_beacons_delta = priv->missed_beacons - 
		priv->last_missed_beacons;
	priv->last_missed_beacons = priv->missed_beacons;
	if (priv->assoc_request.beacon_interval) {
		missed_beacons_percent = missed_beacons_delta *
			(HZ * priv->assoc_request.beacon_interval) /
			(IPW_STATS_INTERVAL * 10);
	} else {
		missed_beacons_percent = 0;
	}
	average_add(&priv->average_missed_beacons, missed_beacons_percent);

	ipw_get_ordinal(priv, IPW_ORD_STAT_RX_ERR_CRC, &rx_err, &len);
	rx_err_delta = rx_err - priv->last_rx_err;
	priv->last_rx_err = rx_err;

	ipw_get_ordinal(priv, IPW_ORD_STAT_TX_FAILURE, &tx_failures, &len);
	tx_failures_delta = tx_failures - priv->last_tx_failures;
	priv->last_tx_failures = tx_failures;

	rx_packets_delta = priv->rx_packets - priv->last_rx_packets;
	priv->last_rx_packets = priv->rx_packets;

	tx_packets_delta = priv->tx_packets - priv->last_tx_packets;
	priv->last_tx_packets = priv->tx_packets;

	/* Calculate quality based on the following:
	 * 
	 * Missed beacon: 100% = 0, 0% = 70% missed
	 * Rate: 60% = 1Mbs, 100% = Max
	 * Rx and Tx errors represent a straight % of total Rx/Tx
	 * RSSI: 100% = > -50,  0% = < -80
	 * Rx errors: 100% = 0, 0% = 50% missed
	 * 
	 * The lowest computed quality is used.
	 *
	 */
#define BEACON_THRESHOLD 5
	beacon_quality = 100 - missed_beacons_percent;
	if (beacon_quality < BEACON_THRESHOLD)
		beacon_quality = 0;
	else
		beacon_quality = (beacon_quality - BEACON_THRESHOLD) * 100 / 
			(100 - BEACON_THRESHOLD);
	IPW_DEBUG_STATS("Missed beacon: %3d%% (%d%%)\n", 
			beacon_quality, missed_beacons_percent);
	
	priv->last_rate = ipw_get_current_rate(priv);
	rate_quality =  priv->last_rate * 40 / priv->last_rate + 60;
	IPW_DEBUG_STATS("Rate quality : %3d%% (%dMbs)\n",
			rate_quality, priv->last_rate / 1000000);
	
	if (rx_packets_delta > 100 && 
	    rx_packets_delta + rx_err_delta) 
		rx_quality = 100 - (rx_err_delta * 100) / 
			(rx_packets_delta + rx_err_delta);
	else
		rx_quality = 100;
	IPW_DEBUG_STATS("Rx quality   : %3d%% (%u errors, %u packets)\n",
			rx_quality, rx_err_delta, rx_packets_delta);
	
	if (tx_packets_delta > 100 && 
	    tx_packets_delta + tx_failures_delta) 
		tx_quality = 100 - (tx_failures_delta * 100) / 
			(tx_packets_delta + tx_failures_delta);
	else
		tx_quality = 100;
	IPW_DEBUG_STATS("Tx quality   : %3d%% (%u errors, %u packets)\n",
			tx_quality, tx_failures_delta, tx_packets_delta);
	
	rssi = average_value(&priv->average_rssi);
	if (rssi > PERFECT_RSSI)
		signal_quality = 100;
	else if (rssi < WORST_RSSI)
		signal_quality = 0;
	else
		signal_quality = (rssi - WORST_RSSI) * 100 / 
			(PERFECT_RSSI - WORST_RSSI);
	IPW_DEBUG_STATS("Signal level : %3d%% (%d dBm)\n",
			signal_quality, rssi);
	
	quality = min(beacon_quality, 
		      min(rate_quality,
			  min(tx_quality, min(rx_quality, signal_quality))));
	if (quality == beacon_quality)
		IPW_DEBUG_STATS(
			"Quality (%d%%): Clamped to missed beacons.\n", 
			quality);
	if (quality == rate_quality)
		IPW_DEBUG_STATS(
			"Quality (%d%%): Clamped to rate quality.\n", 
			quality);
	if (quality == tx_quality)
		IPW_DEBUG_STATS(
			"Quality (%d%%): Clamped to Tx quality.\n", 
			quality);
	if (quality == rx_quality)
		IPW_DEBUG_STATS(
			"Quality (%d%%): Clamped to Rx quality.\n", 
			quality);
	if (quality == signal_quality)
		IPW_DEBUG_STATS(
			"Quality (%d%%): Clamped to signal quality.\n", 
			quality);

	priv->quality = quality;
	
	queue_delayed_work(priv->workqueue, &priv->gather_stats, 
			   IPW_STATS_INTERVAL);
}

/**
 * Handle host notification packet.
 * Called from interrupt routine
 */
static inline void ipw_rx_notification(struct ipw_priv* priv,
				       struct ipw_rx_notification *notif)
{
	IPW_DEBUG_NOTIF("type = %i (%d bytes)\n", 
			notif->subtype, notif->size);
	
	switch (notif->subtype) {
	case HOST_NOTIFICATION_STATUS_ASSOCIATED: {
		struct notif_association *assoc = &notif->u.assoc;
		
		switch (assoc->state) {
		case CMAS_ASSOCIATED: {
			IPW_DEBUG(IPW_DL_NOTIF | IPW_DL_STATE | IPW_DL_ASSOC,
				  "associated: '%s' " MAC_FMT " \n", 
				  escape_essid(priv->essid, priv->essid_len),
				  MAC_ARG(priv->bssid));
			
			switch (priv->ieee->iw_mode) {
			case IW_MODE_INFRA:
				memcpy(priv->ieee->bssid, priv->bssid, 
				       ETH_ALEN);
				break;

			case IW_MODE_ADHOC:
				memcpy(priv->ieee->bssid, priv->bssid, 
				       ETH_ALEN);
				
				/* clear out the station table */
				priv->num_stations = 0;

				IPW_DEBUG_ASSOC("queueing adhoc check\n");
				queue_delayed_work(priv->workqueue, 
						   &priv->adhoc_check,
						   priv->assoc_request.beacon_interval);
				break;
			}

			priv->status &= ~STATUS_ASSOCIATING;
			priv->status |= STATUS_ASSOCIATED;

			netif_carrier_on(priv->net_dev);
			if (netif_queue_stopped(priv->net_dev)) {
				IPW_DEBUG_NOTIF("waking queue\n");
				netif_wake_queue(priv->net_dev);
			} else {
				IPW_DEBUG_NOTIF("starting queue\n");
				netif_start_queue(priv->net_dev);
			}

			ipw_reset_stats(priv);
			/* Ensure the rate is updated immediately */
			priv->last_rate = ipw_get_current_rate(priv);
			schedule_work(&priv->gather_stats);
			notify_wx_assoc_event(priv);

/*			queue_delayed_work(priv->workqueue, 
					   &priv->request_scan,
					   SCAN_ASSOCIATED_INTERVAL);
*/
			break;
		}
			
		case CMAS_AUTHENTICATED: {
			if (priv->status & (STATUS_ASSOCIATED | STATUS_AUTH)) {
#ifdef CONFIG_IPW_DEBUG
				struct notif_authenticate *auth = &notif->u.auth;
				IPW_DEBUG(IPW_DL_NOTIF | IPW_DL_STATE | IPW_DL_ASSOC,
					  "deauthenticated: '%s' " MAC_FMT ": (0x%04X) - %s \n", 
					  escape_essid(priv->essid, priv->essid_len),
					  MAC_ARG(priv->bssid),
					  ntohs(auth->status),
					  ipw_get_status_code(ntohs(auth->status)));
#endif

				priv->status &= ~(STATUS_ASSOCIATING |
						  STATUS_AUTH |
						  STATUS_ASSOCIATED);

				netif_carrier_off(priv->net_dev);
				netif_stop_queue(priv->net_dev);
				queue_work(priv->workqueue, &priv->request_scan);
				notify_wx_assoc_event(priv);			
				break;
			} 

			IPW_DEBUG(IPW_DL_NOTIF | IPW_DL_STATE | IPW_DL_ASSOC,
				  "authenticated: '%s' " MAC_FMT "\n", 
				  escape_essid(priv->essid, priv->essid_len),
				  MAC_ARG(priv->bssid));	
			break;
		}
			
		case CMAS_INIT: {
			IPW_DEBUG(IPW_DL_NOTIF | IPW_DL_STATE | IPW_DL_ASSOC,
				  "disassociated: '%s' " MAC_FMT " \n", 
				  escape_essid(priv->essid, priv->essid_len),
				  MAC_ARG(priv->bssid));

			priv->status &= ~(
				STATUS_DISASSOCIATING |
				STATUS_ASSOCIATING | 
				STATUS_ASSOCIATED |
				STATUS_AUTH);
			
			netif_stop_queue(priv->net_dev);
			if (!(priv->status & STATUS_ROAMING)) {
				netif_carrier_off(priv->net_dev);
				notify_wx_assoc_event(priv);

				/* Cancel any queued work ... */
				cancel_delayed_work(&priv->request_scan);
				cancel_delayed_work(&priv->adhoc_check);

				/* Queue up another scan... */
				queue_work(priv->workqueue, 
					   &priv->request_scan);

				cancel_delayed_work(&priv->gather_stats);
			} else {
				priv->status |= STATUS_ROAMING;
				queue_work(priv->workqueue, 
					   &priv->request_scan);
			}
			
			ipw_reset_stats(priv);
			break;
		}
			
		default: 
			IPW_ERROR("assoc: unknown (%d)\n",
				  assoc->state);
			break;
		}

		break;
	}

	case HOST_NOTIFICATION_STATUS_AUTHENTICATE: {
		struct notif_authenticate *auth = &notif->u.auth;
		switch (auth->state) {
		case CMAS_AUTHENTICATED:
			IPW_DEBUG(IPW_DL_NOTIF | IPW_DL_STATE,
				  "authenticated: '%s' " MAC_FMT " \n", 
				  escape_essid(priv->essid, priv->essid_len),
				  MAC_ARG(priv->bssid));
			priv->status |= STATUS_AUTH;
			break;

		case CMAS_INIT:
			if (priv->status & STATUS_AUTH) {
				IPW_DEBUG(IPW_DL_NOTIF | IPW_DL_STATE | IPW_DL_ASSOC,
					  "authentication failed (0x%04X): %s\n",
					  ntohs(auth->status),
					  ipw_get_status_code(ntohs(auth->status)));
			} 
			IPW_DEBUG(IPW_DL_NOTIF | IPW_DL_STATE | IPW_DL_ASSOC,
				  "deauthenticated: '%s' " MAC_FMT "\n", 
				  escape_essid(priv->essid, priv->essid_len),
				  MAC_ARG(priv->bssid));

			priv->status &= ~(STATUS_ASSOCIATING |
					  STATUS_AUTH |
					  STATUS_ASSOCIATED);

			netif_carrier_off(priv->net_dev);
			netif_stop_queue(priv->net_dev);
			queue_work(priv->workqueue, &priv->request_scan);
			notify_wx_assoc_event(priv);
			break;
			
		case CMAS_TX_AUTH_SEQ_1:
			IPW_DEBUG(IPW_DL_NOTIF | IPW_DL_STATE | IPW_DL_ASSOC,
				  "AUTH_SEQ_1\n");
			break;
		case CMAS_RX_AUTH_SEQ_2:
			IPW_DEBUG(IPW_DL_NOTIF | IPW_DL_STATE | IPW_DL_ASSOC,
				  "AUTH_SEQ_2\n");
			break;
		case CMAS_AUTH_SEQ_1_PASS:
			IPW_DEBUG(IPW_DL_NOTIF | IPW_DL_STATE | IPW_DL_ASSOC,
				  "AUTH_SEQ_1_PASS\n");
			break;
		case CMAS_AUTH_SEQ_1_FAIL:
			IPW_DEBUG(IPW_DL_NOTIF | IPW_DL_STATE | IPW_DL_ASSOC,
				  "AUTH_SEQ_1_FAIL\n");
			break;
		case CMAS_TX_AUTH_SEQ_3:
			IPW_DEBUG(IPW_DL_NOTIF | IPW_DL_STATE | IPW_DL_ASSOC,
				  "AUTH_SEQ_3\n");
			break;
		case CMAS_RX_AUTH_SEQ_4:
			IPW_DEBUG(IPW_DL_NOTIF | IPW_DL_STATE | IPW_DL_ASSOC,
				  "RX_AUTH_SEQ_4\n");
			break;
		case CMAS_AUTH_SEQ_2_PASS:
			IPW_DEBUG(IPW_DL_NOTIF | IPW_DL_STATE | IPW_DL_ASSOC,
				  "AUTH_SEQ_2_PASS\n");
			break;
		case CMAS_AUTH_SEQ_2_FAIL:
			IPW_DEBUG(IPW_DL_NOTIF | IPW_DL_STATE | IPW_DL_ASSOC,
				  "AUT_SEQ_2_FAIL\n");
			break;
		case CMAS_TX_ASSOC:
			IPW_DEBUG(IPW_DL_NOTIF | IPW_DL_STATE | IPW_DL_ASSOC,
				  "TX_ASSOC\n");
			break;
		case CMAS_RX_ASSOC_RESP:
			IPW_DEBUG(IPW_DL_NOTIF | IPW_DL_STATE | IPW_DL_ASSOC,
				  "RX_ASSOC_RESP\n");
			break;
		case CMAS_ASSOCIATED:
			IPW_DEBUG(IPW_DL_NOTIF | IPW_DL_STATE | IPW_DL_ASSOC,
				  "ASSOCIATED\n");
			break;
		default:
			IPW_DEBUG_NOTIF("auth: failure - %d\n", auth->state);
			break;
		}
		break;
	}

	case HOST_NOTIFICATION_STATUS_SCAN_CHANNEL_RESULT: {
		struct notif_channel_result *x = &notif->u.channel_result;
		
		if (notif->size == sizeof(*x)) {
			IPW_DEBUG_SCAN("Scan result for channel %d\n", 
				       x->channel_num);
		} else {
			IPW_DEBUG_SCAN("Scan result of wrong size %d "
3483 3484
				       "(should be %zd)\n",
				       notif->size, sizeof(*x));
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		}
		break;
	}

	case HOST_NOTIFICATION_STATUS_SCAN_COMPLETED: {
		struct notif_scan_complete* x = &notif->u.scan_complete;
		if (notif->size == sizeof(*x)) {
			IPW_DEBUG_SCAN("Scan completed: type %d, %d channels, "
				       "%d status\n",
				       x->scan_type, 
				       x->num_channels, 
				       x->status);
		} else {
			IPW_ERROR("Scan completed of wrong size %d "
3499 3500
				  "(should be %zd)\n",
				  notif->size, sizeof(*x));
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		}
	
		priv->status &= ~(STATUS_SCANNING | STATUS_SCAN_ABORTING);

		cancel_delayed_work(&priv->scan_check);
		
		if (!(priv->status & (STATUS_ASSOCIATED | 
				      STATUS_ASSOCIATING |
				      STATUS_ROAMING |
				      STATUS_DISASSOCIATING)))
			queue_work(priv->workqueue, &priv->associate);
		else if (priv->status & STATUS_ROAMING) {
			/* If a scan completed and we are in roam mode, then
			 * the scan that completed was the one requested as a
			 * result of entering roam... so, schedule the 
			 * roam work */
			queue_work(priv->workqueue, &priv->roam);
		} else if (priv->status & STATUS_SCAN_PENDING)
			queue_work(priv->workqueue, &priv->request_scan);

		priv->ieee->scans++;
		break;
	}

	case HOST_NOTIFICATION_STATUS_FRAG_LENGTH: {
		struct notif_frag_length *x = &notif->u.frag_len;

		if (notif->size == sizeof(*x)) {
			IPW_ERROR("Frag length: %d\n", x->frag_length);
		} else {
			IPW_ERROR("Frag length of wrong size %d "
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				  "(should be %zd)\n",
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				  notif->size, sizeof(*x));
		}
		break;
	}

	case HOST_NOTIFICATION_STATUS_LINK_DETERIORATION: {
		struct notif_link_deterioration *x = 
			&notif->u.link_deterioration;
		if (notif->size==sizeof(*x)) {
			IPW_DEBUG(IPW_DL_NOTIF | IPW_DL_STATE,
				  "link deterioration: '%s' " MAC_FMT " \n", 
				  escape_essid(priv->essid, priv->essid_len),
				  MAC_ARG(priv->bssid));
			memcpy(&priv->last_link_deterioration, x, sizeof(*x));
		} else {
			IPW_ERROR("Link Deterioration of wrong size %d "
3549 3550
				  "(should be %zd)\n",
				  notif->size, sizeof(*x));
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		}
		break;
	}

	case HOST_NOTIFICATION_DINO_CONFIG_RESPONSE: {
		IPW_ERROR("Dino config\n");
		if (priv->hcmd && priv->hcmd->cmd == HOST_CMD_DINO_CONFIG) {
			/* TODO: Do anything special? */
		} else {
			IPW_ERROR("Unexpected DINO_CONFIG_RESPONSE\n");
		}
		break;
	}

	case HOST_NOTIFICATION_STATUS_BEACON_STATE: {
		struct notif_beacon_state *x = &notif->u.beacon_state;
		if (notif->size != sizeof(*x)) {
			IPW_ERROR("Beacon state of wrong size %d (should "
3569
				  "be %zd)\n", notif->size, sizeof(*x));
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			break;
		}

		if (x->state == HOST_NOTIFICATION_STATUS_BEACON_MISSING) {
			if (priv->status & STATUS_SCANNING) {
				/* Stop scan to keep fw from getting
				 * stuck... */
				queue_work(priv->workqueue,
					   &priv->abort_scan);
			}

			if (x->number > priv->missed_beacon_threshold &&
			    priv->status & STATUS_ASSOCIATED) {
				IPW_DEBUG(IPW_DL_INFO | IPW_DL_NOTIF | 
					  IPW_DL_STATE,
					  "Missed beacon: %d - disassociate\n",
					  x->number);
				queue_work(priv->workqueue, 
					   &priv->disassociate);
			} else if (x->number > priv->roaming_threshold) {
				IPW_DEBUG(IPW_DL_NOTIF | IPW_DL_STATE, 
					  "Missed beacon: %d - initiate "
					  "roaming\n",
					  x->number);
				queue_work(priv->workqueue,
					   &priv->roam);
			} else {
				IPW_DEBUG_NOTIF("Missed beacon: %d\n",
						x->number);
			}

			priv->notif_missed_beacons = x->number;

                }


		break;
	}

	case HOST_NOTIFICATION_STATUS_TGI_TX_KEY: {
		struct notif_tgi_tx_key *x = &notif->u.tgi_tx_key;
		if (notif->size==sizeof(*x)) {
			IPW_ERROR("TGi Tx Key: state 0x%02x sec type "
				  "0x%02x station %d\n",
				  x->key_state,x->security_type,
				  x->station_index);
			break;
		} 

3619 3620
		IPW_ERROR("TGi Tx Key of wrong size %d (should be %zd)\n",
			  notif->size, sizeof(*x));
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		break;
	}

	case HOST_NOTIFICATION_CALIB_KEEP_RESULTS: {
		struct notif_calibration *x = &notif->u.calibration;

		if (notif->size == sizeof(*x)) {
			memcpy(&priv->calib, x, sizeof(*x));
			IPW_DEBUG_INFO("TODO: Calibration\n");
			break;
		} 
		
3633 3634
		IPW_ERROR("Calibration of wrong size %d (should be %zd)\n",
			  notif->size, sizeof(*x));
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		break;
	}

	case HOST_NOTIFICATION_NOISE_STATS: {
		if (notif->size == sizeof(u32)) {
			priv->last_noise = (u8)(notif->u.noise.value & 0xff);
			average_add(&priv->average_noise, priv->last_noise);
			break;
		}

3645
		IPW_ERROR("Noise stat is wrong size %d (should be %zd)\n",
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3846 3847 3848 3849 3850 3851 3852 3853 3854 3855 3856 3857 3858 3859 3860 3861 3862 3863 3864 3865 3866 3867 3868 3869 3870 3871 3872 3873 3874 3875 3876 3877 3878 3879 3880 3881 3882 3883 3884 3885 3886 3887 3888 3889 3890 3891 3892 3893 3894 3895 3896 3897 3898 3899 3900 3901 3902 3903 3904 3905 3906 3907 3908 3909 3910 3911 3912 3913 3914 3915 3916 3917 3918 3919 3920 3921 3922 3923 3924 3925 3926 3927 3928 3929 3930 3931 3932 3933 3934 3935 3936 3937 3938 3939 3940 3941 3942 3943 3944 3945 3946 3947 3948 3949 3950 3951 3952 3953 3954 3955 3956 3957 3958 3959 3960 3961 3962 3963 3964 3965 3966 3967 3968 3969 3970 3971 3972 3973 3974 3975 3976 3977 3978 3979 3980 3981 3982 3983 3984 3985 3986 3987 3988 3989 3990 3991 3992 3993 3994 3995 3996 3997 3998 3999 4000 4001 4002 4003 4004 4005 4006 4007 4008 4009 4010 4011 4012 4013 4014 4015 4016 4017 4018 4019 4020 4021 4022 4023 4024 4025 4026 4027 4028 4029 4030 4031 4032 4033 4034 4035 4036 4037 4038 4039 4040 4041 4042 4043 4044 4045 4046 4047 4048 4049 4050 4051 4052 4053 4054 4055 4056 4057 4058 4059 4060 4061 4062 4063 4064 4065 4066 4067 4068 4069 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 4096 4097 4098 4099 4100 4101 4102 4103 4104 4105 4106 4107 4108 4109 4110 4111 4112 4113 4114 4115 4116 4117 4118 4119 4120 4121 4122 4123 4124 4125 4126 4127 4128 4129 4130 4131 4132 4133 4134 4135 4136 4137 4138 4139 4140 4141 4142 4143 4144 4145 4146 4147 4148 4149 4150 4151 4152 4153 4154 4155 4156 4157 4158 4159 4160 4161 4162 4163 4164 4165 4166 4167 4168 4169 4170 4171 4172 4173 4174 4175 4176 4177 4178 4179 4180 4181 4182 4183 4184 4185 4186 4187 4188 4189 4190 4191 4192 4193 4194 4195 4196 4197 4198 4199 4200 4201 4202 4203 4204 4205 4206 4207 4208 4209 4210 4211 4212 4213 4214 4215 4216 4217 4218 4219 4220 4221 4222 4223 4224 4225 4226 4227 4228 4229 4230 4231 4232 4233 4234 4235 4236 4237 4238 4239 4240 4241 4242 4243 4244 4245 4246 4247 4248 4249 4250 4251 4252 4253 4254 4255 4256 4257 4258 4259 4260 4261 4262 4263 4264 4265 4266 4267 4268 4269 4270 4271 4272 4273 4274 4275 4276 4277 4278 4279 4280 4281 4282 4283 4284 4285 4286 4287 4288 4289 4290 4291 4292 4293 4294 4295 4296 4297 4298 4299 4300 4301 4302 4303 4304 4305 4306 4307 4308 4309 4310 4311 4312 4313 4314 4315 4316 4317 4318 4319 4320 4321 4322 4323 4324 4325 4326 4327 4328 4329 4330 4331 4332 4333 4334 4335 4336 4337 4338 4339 4340 4341 4342 4343 4344 4345 4346 4347 4348 4349 4350 4351 4352 4353 4354 4355 4356 4357 4358 4359 4360 4361 4362 4363 4364 4365 4366 4367 4368 4369 4370 4371 4372 4373 4374 4375 4376 4377 4378 4379 4380 4381 4382 4383 4384 4385 4386 4387 4388 4389 4390 4391 4392 4393 4394 4395 4396 4397 4398 4399 4400 4401 4402 4403 4404 4405 4406 4407 4408 4409 4410 4411 4412 4413 4414 4415 4416 4417 4418 4419 4420 4421 4422 4423 4424 4425 4426 4427 4428 4429 4430 4431 4432 4433 4434 4435 4436 4437 4438 4439 4440 4441 4442 4443 4444 4445 4446 4447 4448 4449 4450 4451 4452 4453 4454 4455 4456 4457 4458 4459 4460 4461 4462 4463 4464 4465 4466 4467 4468 4469 4470 4471 4472 4473 4474 4475 4476 4477 4478 4479 4480 4481 4482 4483 4484 4485 4486 4487 4488 4489 4490 4491 4492 4493 4494 4495 4496 4497 4498 4499 4500 4501 4502 4503 4504 4505 4506 4507 4508 4509 4510 4511 4512 4513 4514 4515 4516 4517 4518 4519 4520 4521 4522 4523 4524 4525 4526 4527 4528 4529 4530 4531 4532 4533 4534 4535 4536 4537 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 4563 4564 4565 4566 4567 4568 4569 4570 4571 4572 4573 4574 4575 4576 4577 4578 4579 4580 4581 4582 4583 4584 4585 4586 4587 4588 4589 4590 4591 4592 4593 4594 4595 4596 4597 4598 4599 4600 4601 4602 4603 4604 4605 4606 4607 4608 4609 4610 4611 4612 4613 4614 4615 4616 4617 4618 4619 4620 4621 4622 4623 4624 4625 4626 4627 4628 4629 4630 4631 4632 4633 4634 4635 4636 4637 4638 4639 4640 4641 4642 4643 4644 4645 4646 4647 4648 4649 4650 4651 4652 4653 4654 4655 4656 4657 4658 4659 4660 4661 4662 4663 4664 4665 4666 4667 4668 4669 4670 4671 4672 4673 4674 4675 4676 4677 4678 4679 4680 4681 4682 4683 4684 4685 4686 4687 4688 4689 4690 4691 4692 4693 4694 4695 4696 4697 4698 4699 4700 4701 4702 4703 4704 4705 4706 4707 4708 4709 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 4736 4737 4738 4739 4740 4741 4742 4743 4744 4745 4746 4747 4748 4749 4750 4751 4752 4753 4754 4755 4756 4757 4758 4759 4760 4761 4762 4763 4764 4765 4766 4767 4768 4769 4770 4771 4772 4773 4774 4775 4776 4777 4778 4779 4780 4781 4782 4783 4784 4785 4786 4787 4788 4789 4790 4791 4792 4793 4794 4795 4796 4797 4798 4799 4800 4801 4802 4803 4804 4805 4806 4807 4808 4809 4810 4811 4812 4813 4814 4815 4816 4817 4818 4819 4820 4821 4822 4823 4824 4825 4826 4827 4828 4829 4830 4831 4832 4833 4834 4835 4836 4837 4838 4839
			  notif->size, sizeof(u32));
		break;
	}

	default:
		IPW_ERROR("Unknown notification: "
			  "subtype=%d,flags=0x%2x,size=%d\n",
			  notif->subtype, notif->flags, notif->size);
	}
}

/**
 * Destroys all DMA structures and initialise them again
 * 
 * @param priv
 * @return error code
 */
static int ipw_queue_reset(struct ipw_priv *priv)
{
	int rc = 0;
	/** @todo customize queue sizes */
	int nTx = 64, nTxCmd = 8;
	ipw_tx_queue_free(priv);
	/* Tx CMD queue */
	rc = ipw_queue_tx_init(priv, &priv->txq_cmd, nTxCmd,
			       CX2_TX_CMD_QUEUE_READ_INDEX,
			       CX2_TX_CMD_QUEUE_WRITE_INDEX,
			       CX2_TX_CMD_QUEUE_BD_BASE,
			       CX2_TX_CMD_QUEUE_BD_SIZE);
	if (rc) {
		IPW_ERROR("Tx Cmd queue init failed\n");
		goto error;
	}
	/* Tx queue(s) */
	rc = ipw_queue_tx_init(priv, &priv->txq[0], nTx,
			       CX2_TX_QUEUE_0_READ_INDEX,
			       CX2_TX_QUEUE_0_WRITE_INDEX,
			       CX2_TX_QUEUE_0_BD_BASE,
			       CX2_TX_QUEUE_0_BD_SIZE);
	if (rc) {
		IPW_ERROR("Tx 0 queue init failed\n");
		goto error;
	}
	rc = ipw_queue_tx_init(priv, &priv->txq[1], nTx,
			       CX2_TX_QUEUE_1_READ_INDEX,
			       CX2_TX_QUEUE_1_WRITE_INDEX,
			       CX2_TX_QUEUE_1_BD_BASE,
			       CX2_TX_QUEUE_1_BD_SIZE);
	if (rc) {
		IPW_ERROR("Tx 1 queue init failed\n");
		goto error;
	}
	rc = ipw_queue_tx_init(priv, &priv->txq[2], nTx,
			       CX2_TX_QUEUE_2_READ_INDEX,
			       CX2_TX_QUEUE_2_WRITE_INDEX,
			       CX2_TX_QUEUE_2_BD_BASE,
			       CX2_TX_QUEUE_2_BD_SIZE);
	if (rc) {
		IPW_ERROR("Tx 2 queue init failed\n");
		goto error;
	}
	rc = ipw_queue_tx_init(priv, &priv->txq[3], nTx,
			       CX2_TX_QUEUE_3_READ_INDEX,
			       CX2_TX_QUEUE_3_WRITE_INDEX,
			       CX2_TX_QUEUE_3_BD_BASE,
			       CX2_TX_QUEUE_3_BD_SIZE);
	if (rc) {
		IPW_ERROR("Tx 3 queue init failed\n");
		goto error;
	}
	/* statistics */
	priv->rx_bufs_min = 0;
	priv->rx_pend_max = 0;
	return rc;

 error:
	ipw_tx_queue_free(priv);
	return rc;
}

/**
 * Reclaim Tx queue entries no more used by NIC.
 * 
 * When FW adwances 'R' index, all entries between old and
 * new 'R' index need to be reclaimed. As result, some free space
 * forms. If there is enough free space (> low mark), wake Tx queue.
 * 
 * @note Need to protect against garbage in 'R' index
 * @param priv
 * @param txq
 * @param qindex
 * @return Number of used entries remains in the queue
 */
static int ipw_queue_tx_reclaim(struct ipw_priv *priv, 
				struct clx2_tx_queue *txq, int qindex)
{
	u32 hw_tail;
	int used;
	struct clx2_queue *q = &txq->q;

	hw_tail = ipw_read32(priv, q->reg_r);
	if (hw_tail >= q->n_bd) {
		IPW_ERROR
			("Read index for DMA queue (%d) is out of range [0-%d)\n",
			 hw_tail, q->n_bd);
		goto done;
	}
	for (; q->last_used != hw_tail;
	     q->last_used = ipw_queue_inc_wrap(q->last_used, q->n_bd)) {
		ipw_queue_tx_free_tfd(priv, txq);
		priv->tx_packets++;
	}
 done:
	if (ipw_queue_space(q) > q->low_mark && qindex >= 0) {
		__maybe_wake_tx(priv);
	}
	used = q->first_empty - q->last_used;
	if (used < 0)
		used += q->n_bd;

	return used;
}

static int ipw_queue_tx_hcmd(struct ipw_priv *priv, int hcmd, void *buf,
			     int len, int sync)
{
	struct clx2_tx_queue *txq = &priv->txq_cmd;
	struct clx2_queue *q = &txq->q;
	struct tfd_frame *tfd;

	if (ipw_queue_space(q) < (sync ? 1 : 2)) {
		IPW_ERROR("No space for Tx\n");
		return -EBUSY;
	}

	tfd = &txq->bd[q->first_empty];
	txq->txb[q->first_empty] = NULL;

	memset(tfd, 0, sizeof(*tfd));
	tfd->control_flags.message_type = TX_HOST_COMMAND_TYPE;
	tfd->control_flags.control_bits = TFD_NEED_IRQ_MASK;
	priv->hcmd_seq++;
	tfd->u.cmd.index = hcmd;
	tfd->u.cmd.length = len;
	memcpy(tfd->u.cmd.payload, buf, len);
	q->first_empty = ipw_queue_inc_wrap(q->first_empty, q->n_bd);
	ipw_write32(priv, q->reg_w, q->first_empty);
	_ipw_read32(priv, 0x90);

	return 0;
}



/* 
 * Rx theory of operation
 *
 * The host allocates 32 DMA target addresses and passes the host address
 * to the firmware at register CX2_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.  
 *
 * During initialization the host sets up the READ queue position to the first 
 * INDEX position, and WRITE to the last (READ - 1 wrapped)
 *
 * When the firmware places a packet in a buffer it will advance the READ index
 * 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 ipw->rxq->rx_free.  When 
 *   ipw->rxq->free_count drops to or below RX_LOW_WATERMARK, work is scheduled
 *   to replensish the ipw->rxq->rx_free.  
 * + In ipw_rx_queue_replenish (scheduled) if 'processed' != 'read' then the
 *   ipw->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 ipw->rxq.  The driver 'processed' index is updated.
 * + The Host/Firmware ipw->rxq is replenished at tasklet time from the rx_free
 *   list. If there are no allocated buffers in ipw->rxq->rx_free, the READ 
 *   INDEX is not incremented and ipw->status(RX_STALLED) is set.  If there 
 *   were enough free buffers and RX_STALLED is set it is cleared.
 *
 *
 * Driver sequence:
 *
 * ipw_rx_queue_alloc()       Allocates rx_free 
 * ipw_rx_queue_replenish()   Replenishes rx_free list from rx_used, and calls
 *                            ipw_rx_queue_restock
 * ipw_rx_queue_restock()     Moves available buffers from rx_free into Rx
 *                            queue, updates firmware pointers, and updates
 *                            the WRITE index.  If insufficient rx_free buffers
 *                            are available, schedules ipw_rx_queue_replenish
 *
 * -- enable interrupts --
 * ISR - ipw_rx()             Detach ipw_rx_mem_buffers from pool up to the
 *                            READ INDEX, detaching the SKB from the pool. 
 *                            Moves the packet buffer from queue to rx_used.
 *                            Calls ipw_rx_queue_restock to refill any empty
 *                            slots.
 * ...
 *
 */

/* 
 * If there are slots in the RX queue that  need to be restocked,
 * and we have free pre-allocated buffers, fill the ranks as much
 * as we can pulling from rx_free.
 *
 * 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.
 */
static void ipw_rx_queue_restock(struct ipw_priv *priv)
{
	struct ipw_rx_queue *rxq = priv->rxq;
	struct list_head *element;
	struct ipw_rx_mem_buffer *rxb;
	unsigned long flags;
	int write;

	spin_lock_irqsave(&rxq->lock, flags);
	write = rxq->write;
	while ((rxq->write != rxq->processed) && (rxq->free_count)) {
		element = rxq->rx_free.next;
		rxb = list_entry(element, struct ipw_rx_mem_buffer, list);
		list_del(element);

		ipw_write32(priv, CX2_RFDS_TABLE_LOWER + rxq->write * RFD_SIZE,
			    rxb->dma_addr);
		rxq->queue[rxq->write] = rxb;
		rxq->write = (rxq->write + 1) % RX_QUEUE_SIZE;
		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);

	/* If we've added more space for the firmware to place data, tell it */
	if (write != rxq->write) 
		ipw_write32(priv, CX2_RX_WRITE_INDEX, rxq->write);
}

/*
 * Move all used packet from rx_used to rx_free, allocating a new SKB for each.
 * Also restock the Rx queue via ipw_rx_queue_restock.  
 * 
 * This is called as a scheduled work item (except for during intialization)
 */
static void ipw_rx_queue_replenish(void *data)
{
	struct ipw_priv *priv = data;
	struct ipw_rx_queue *rxq = priv->rxq;
	struct list_head *element;
	struct ipw_rx_mem_buffer *rxb;
	unsigned long flags;

	spin_lock_irqsave(&rxq->lock, flags);
	while (!list_empty(&rxq->rx_used)) {
		element = rxq->rx_used.next;
		rxb = list_entry(element, struct ipw_rx_mem_buffer, list);
		rxb->skb = alloc_skb(CX2_RX_BUF_SIZE, GFP_ATOMIC);
		if (!rxb->skb) {
			printk(KERN_CRIT "%s: Can not allocate SKB buffers.\n",
			       priv->net_dev->name);
			/* 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;
		}
		list_del(element);
		
		rxb->rxb = (struct ipw_rx_buffer *)rxb->skb->data;
		rxb->dma_addr = pci_map_single(
			priv->pci_dev, rxb->skb->data, CX2_RX_BUF_SIZE,
			PCI_DMA_FROMDEVICE);
		
		list_add_tail(&rxb->list, &rxq->rx_free);
		rxq->free_count++;
	}
	spin_unlock_irqrestore(&rxq->lock, flags);

	ipw_rx_queue_restock(priv);
}

/* Assumes that the skb field of the buffers in 'pool' is kept accurate.
 * If an SKB has been detached, the POOL needs to have it's SKB set to NULL
 * This free routine walks the list of POOL entries and if SKB is set to 
 * non NULL it is unmapped and freed
 */
static void ipw_rx_queue_free(struct ipw_priv *priv, 
			      struct ipw_rx_queue *rxq)
{
	int i;

	if (!rxq)
		return;
	
	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,
					 CX2_RX_BUF_SIZE,
					 PCI_DMA_FROMDEVICE);
			dev_kfree_skb(rxq->pool[i].skb);
		}
	}

	kfree(rxq);
}

static struct ipw_rx_queue *ipw_rx_queue_alloc(struct ipw_priv *priv)
{
	struct ipw_rx_queue *rxq;
	int i;

	rxq = (struct ipw_rx_queue *)kmalloc(sizeof(*rxq), GFP_KERNEL);
	memset(rxq, 0, sizeof(*rxq));
	spin_lock_init(&rxq->lock);
	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++) 
		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->processed = RX_QUEUE_SIZE - 1;
	rxq->free_count = 0;

	return rxq;
}

static int ipw_is_rate_in_mask(struct ipw_priv *priv, int ieee_mode, u8 rate)
{
	rate &= ~IEEE80211_BASIC_RATE_MASK;
	if (ieee_mode == IEEE_A) {
		switch (rate) {
		case IEEE80211_OFDM_RATE_6MB: 
			return priv->rates_mask & IEEE80211_OFDM_RATE_6MB_MASK ? 
				1 : 0;
		case IEEE80211_OFDM_RATE_9MB: 
			return priv->rates_mask & IEEE80211_OFDM_RATE_9MB_MASK ? 
				1 : 0;
		case IEEE80211_OFDM_RATE_12MB: 
			return priv->rates_mask & IEEE80211_OFDM_RATE_12MB_MASK ? 
				1 : 0;
		case IEEE80211_OFDM_RATE_18MB: 
			return priv->rates_mask & IEEE80211_OFDM_RATE_18MB_MASK ? 
				1 : 0;
		case IEEE80211_OFDM_RATE_24MB: 
			return priv->rates_mask & IEEE80211_OFDM_RATE_24MB_MASK ? 
				1 : 0;
		case IEEE80211_OFDM_RATE_36MB: 
			return priv->rates_mask & IEEE80211_OFDM_RATE_36MB_MASK ? 
				1 : 0;
		case IEEE80211_OFDM_RATE_48MB: 
			return priv->rates_mask & IEEE80211_OFDM_RATE_48MB_MASK ? 
				1 : 0;
		case IEEE80211_OFDM_RATE_54MB: 
			return priv->rates_mask & IEEE80211_OFDM_RATE_54MB_MASK ? 
				1 : 0;
		default:
			return 0;
		}
	}
	
	/* B and G mixed */
	switch (rate) {
	case IEEE80211_CCK_RATE_1MB: 
		return priv->rates_mask & IEEE80211_CCK_RATE_1MB_MASK ? 1 : 0;
	case IEEE80211_CCK_RATE_2MB: 
		return priv->rates_mask & IEEE80211_CCK_RATE_2MB_MASK ? 1 : 0;
	case IEEE80211_CCK_RATE_5MB: 
		return priv->rates_mask & IEEE80211_CCK_RATE_5MB_MASK ? 1 : 0;
	case IEEE80211_CCK_RATE_11MB: 
		return priv->rates_mask & IEEE80211_CCK_RATE_11MB_MASK ? 1 : 0;
	}

	/* If we are limited to B modulations, bail at this point */
	if (ieee_mode == IEEE_B)
		return 0;

	/* G */
	switch (rate) {
	case IEEE80211_OFDM_RATE_6MB: 
		return priv->rates_mask & IEEE80211_OFDM_RATE_6MB_MASK ? 1 : 0;
	case IEEE80211_OFDM_RATE_9MB: 
		return priv->rates_mask & IEEE80211_OFDM_RATE_9MB_MASK ? 1 : 0;
	case IEEE80211_OFDM_RATE_12MB: 
		return priv->rates_mask & IEEE80211_OFDM_RATE_12MB_MASK ? 1 : 0;
	case IEEE80211_OFDM_RATE_18MB: 
		return priv->rates_mask & IEEE80211_OFDM_RATE_18MB_MASK ? 1 : 0;
	case IEEE80211_OFDM_RATE_24MB: 
		return priv->rates_mask & IEEE80211_OFDM_RATE_24MB_MASK ? 1 : 0;
	case IEEE80211_OFDM_RATE_36MB: 
		return priv->rates_mask & IEEE80211_OFDM_RATE_36MB_MASK ? 1 : 0;
	case IEEE80211_OFDM_RATE_48MB: 
		return priv->rates_mask & IEEE80211_OFDM_RATE_48MB_MASK ? 1 : 0;
	case IEEE80211_OFDM_RATE_54MB: 
		return priv->rates_mask & IEEE80211_OFDM_RATE_54MB_MASK ? 1 : 0;
	}

	return 0;
}

static int ipw_compatible_rates(struct ipw_priv *priv, 
				const struct ieee80211_network *network,
				struct ipw_supported_rates *rates)
{
	int num_rates, i;

	memset(rates, 0, sizeof(*rates));
	num_rates = min(network->rates_len, (u8)IPW_MAX_RATES);
	rates->num_rates = 0;
	for (i = 0; i < num_rates; i++) {
		if (!ipw_is_rate_in_mask(priv, network->mode, network->rates[i])) {
			IPW_DEBUG_SCAN("Rate %02X masked : 0x%08X\n",
				       network->rates[i], priv->rates_mask);
			continue;
		}
		
		rates->supported_rates[rates->num_rates++] = network->rates[i];
	}

	num_rates = min(network->rates_ex_len, (u8)(IPW_MAX_RATES - num_rates));
	for (i = 0; i < num_rates; i++) {
		if (!ipw_is_rate_in_mask(priv, network->mode, network->rates_ex[i])) {
			IPW_DEBUG_SCAN("Rate %02X masked : 0x%08X\n",
				       network->rates_ex[i], priv->rates_mask);
			continue;
		}
		
		rates->supported_rates[rates->num_rates++] = network->rates_ex[i];
	}

	return rates->num_rates;
}

static inline void ipw_copy_rates(struct ipw_supported_rates *dest,
				  const struct ipw_supported_rates *src)
{
	u8 i;
	for (i = 0; i < src->num_rates; i++)
		dest->supported_rates[i] = src->supported_rates[i];
	dest->num_rates = src->num_rates;
}

/* TODO: Look at sniffed packets in the air to determine if the basic rate
 * mask should ever be used -- right now all callers to add the scan rates are
 * set with the modulation = CCK, so BASIC_RATE_MASK is never set... */
static void ipw_add_cck_scan_rates(struct ipw_supported_rates *rates,
			       u8 modulation, u32 rate_mask)
{
	u8 basic_mask = (IEEE80211_OFDM_MODULATION == modulation) ? 
		IEEE80211_BASIC_RATE_MASK : 0;
  
	if (rate_mask & IEEE80211_CCK_RATE_1MB_MASK)
		rates->supported_rates[rates->num_rates++] = 
			IEEE80211_BASIC_RATE_MASK | IEEE80211_CCK_RATE_1MB;

	if (rate_mask & IEEE80211_CCK_RATE_2MB_MASK)
		rates->supported_rates[rates->num_rates++] = 
			IEEE80211_BASIC_RATE_MASK | IEEE80211_CCK_RATE_2MB;

	if (rate_mask & IEEE80211_CCK_RATE_5MB_MASK)
		rates->supported_rates[rates->num_rates++] = basic_mask | 
			IEEE80211_CCK_RATE_5MB;

	if (rate_mask & IEEE80211_CCK_RATE_11MB_MASK)
		rates->supported_rates[rates->num_rates++] = basic_mask | 
			IEEE80211_CCK_RATE_11MB;
}

static void ipw_add_ofdm_scan_rates(struct ipw_supported_rates *rates,
				u8 modulation, u32 rate_mask)
{
	u8 basic_mask = (IEEE80211_OFDM_MODULATION == modulation) ? 
		IEEE80211_BASIC_RATE_MASK : 0;

	if (rate_mask & IEEE80211_OFDM_RATE_6MB_MASK)
		rates->supported_rates[rates->num_rates++] = basic_mask | 
			IEEE80211_OFDM_RATE_6MB;

	if (rate_mask & IEEE80211_OFDM_RATE_9MB_MASK)
		rates->supported_rates[rates->num_rates++] = 
			IEEE80211_OFDM_RATE_9MB;

	if (rate_mask & IEEE80211_OFDM_RATE_12MB_MASK)
		rates->supported_rates[rates->num_rates++] = basic_mask | 
			IEEE80211_OFDM_RATE_12MB;

	if (rate_mask & IEEE80211_OFDM_RATE_18MB_MASK)
		rates->supported_rates[rates->num_rates++] = 
			IEEE80211_OFDM_RATE_18MB;

	if (rate_mask & IEEE80211_OFDM_RATE_24MB_MASK)
		rates->supported_rates[rates->num_rates++] = basic_mask | 
			IEEE80211_OFDM_RATE_24MB;

	if (rate_mask & IEEE80211_OFDM_RATE_36MB_MASK)
		rates->supported_rates[rates->num_rates++] = 
			IEEE80211_OFDM_RATE_36MB;

	if (rate_mask & IEEE80211_OFDM_RATE_48MB_MASK)
		rates->supported_rates[rates->num_rates++] = 
			IEEE80211_OFDM_RATE_48MB;

	if (rate_mask & IEEE80211_OFDM_RATE_54MB_MASK)
		rates->supported_rates[rates->num_rates++] = 
			IEEE80211_OFDM_RATE_54MB;
}

struct ipw_network_match {
	struct ieee80211_network *network;
	struct ipw_supported_rates rates;
};

static int ipw_best_network(
	struct ipw_priv *priv,
	struct ipw_network_match *match,
	struct ieee80211_network *network,
	int roaming)
{
	struct ipw_supported_rates rates;

	/* Verify that this network's capability is compatible with the
	 * current mode (AdHoc or Infrastructure) */
	if ((priv->ieee->iw_mode == IW_MODE_INFRA &&
	     !(network->capability & WLAN_CAPABILITY_BSS)) || 
	    (priv->ieee->iw_mode == IW_MODE_ADHOC &&
	     !(network->capability & WLAN_CAPABILITY_IBSS))) {
		IPW_DEBUG_ASSOC("Network '%s (" MAC_FMT ")' excluded due to "
				"capability mismatch.\n", 
				escape_essid(network->ssid, network->ssid_len),
				MAC_ARG(network->bssid));
		return 0;
	}

	/* If we do not have an ESSID for this AP, we can not associate with
	 * it */
	if (network->flags & NETWORK_EMPTY_ESSID) {
		IPW_DEBUG_ASSOC("Network '%s (" MAC_FMT ")' excluded "
				"because of hidden ESSID.\n",
				escape_essid(network->ssid, network->ssid_len),
				MAC_ARG(network->bssid));
		return 0;
	}
	
	if (unlikely(roaming)) {
		/* If we are roaming, then ensure check if this is a valid
		 * network to try and roam to */
		if ((network->ssid_len != match->network->ssid_len) ||
		    memcmp(network->ssid, match->network->ssid, 
			   network->ssid_len)) {
			IPW_DEBUG_ASSOC("Netowrk '%s (" MAC_FMT ")' excluded "
					"because of non-network ESSID.\n",
					escape_essid(network->ssid, 
						     network->ssid_len),
					MAC_ARG(network->bssid));
			return 0;
		}
	} else {
		/* If an ESSID has been configured then compare the broadcast 
		 * ESSID to ours */		
		if ((priv->config & CFG_STATIC_ESSID) && 
		    ((network->ssid_len != priv->essid_len) ||
		     memcmp(network->ssid, priv->essid, 
			    min(network->ssid_len, priv->essid_len)))) {
			char escaped[IW_ESSID_MAX_SIZE * 2 + 1];
			strncpy(escaped, escape_essid(
					network->ssid, network->ssid_len),
				sizeof(escaped));
			IPW_DEBUG_ASSOC("Network '%s (" MAC_FMT ")' excluded "
					"because of ESSID mismatch: '%s'.\n", 
					escaped, MAC_ARG(network->bssid),
					escape_essid(priv->essid, priv->essid_len));
			return 0;
		}
	}

	/* If the old network rate is better than this one, don't bother
	 * testing everything else. */
	if (match->network && match->network->stats.rssi > 
	    network->stats.rssi) {
		char escaped[IW_ESSID_MAX_SIZE * 2 + 1];
		strncpy(escaped, 
			escape_essid(network->ssid, network->ssid_len), 
			sizeof(escaped));
		IPW_DEBUG_ASSOC("Network '%s (" MAC_FMT ")' excluded because "
				"'%s (" MAC_FMT ")' has a stronger signal.\n",
				escaped, MAC_ARG(network->bssid),
				escape_essid(match->network->ssid,
					     match->network->ssid_len),
				MAC_ARG(match->network->bssid));
		return 0;
	}
	
	/* If this network has already had an association attempt within the
	 * last 3 seconds, do not try and associate again... */
	if (network->last_associate &&
	    time_after(network->last_associate + (HZ * 5UL), jiffies)) {
		IPW_DEBUG_ASSOC("Network '%s (" MAC_FMT ")' excluded "
				"because of storming (%lu since last "
				"assoc attempt).\n",
				escape_essid(network->ssid, network->ssid_len),
				MAC_ARG(network->bssid),
				(jiffies - network->last_associate) / HZ);
		return 0;
	}

	/* Now go through and see if the requested network is valid... */
	if (priv->ieee->scan_age != 0 && 
	    jiffies - network->last_scanned > priv->ieee->scan_age) {
		IPW_DEBUG_ASSOC("Network '%s (" MAC_FMT ")' excluded "
				"because of age: %lums.\n",
				escape_essid(network->ssid, network->ssid_len),
				MAC_ARG(network->bssid),
				(jiffies - network->last_scanned) / (HZ / 100));
		return 0;
	}	

	if ((priv->config & CFG_STATIC_CHANNEL) && 
	    (network->channel != priv->channel)) {
		IPW_DEBUG_ASSOC("Network '%s (" MAC_FMT ")' excluded "
				"because of channel mismatch: %d != %d.\n",
				escape_essid(network->ssid, network->ssid_len),
				MAC_ARG(network->bssid),
				network->channel, priv->channel);
		return 0;
	}
	
	/* Verify privacy compatability */
	if (((priv->capability & CAP_PRIVACY_ON) ? 1 : 0) != 
	    ((network->capability & WLAN_CAPABILITY_PRIVACY) ? 1 : 0)) {
		IPW_DEBUG_ASSOC("Network '%s (" MAC_FMT ")' excluded "
				"because of privacy mismatch: %s != %s.\n",
				escape_essid(network->ssid, network->ssid_len),
				MAC_ARG(network->bssid),
				priv->capability & CAP_PRIVACY_ON ? "on" : 
				"off",
				network->capability & 
				WLAN_CAPABILITY_PRIVACY ?"on" : "off");
		return 0;
	}
	
	if ((priv->config & CFG_STATIC_BSSID) && 
	    memcmp(network->bssid, priv->bssid, ETH_ALEN)) {
		IPW_DEBUG_ASSOC("Network '%s (" MAC_FMT ")' excluded "
				"because of BSSID mismatch: " MAC_FMT ".\n",
				escape_essid(network->ssid, network->ssid_len),
				MAC_ARG(network->bssid),
				MAC_ARG(priv->bssid));
		return 0;
	}
	
	/* Filter out any incompatible freq / mode combinations */
	if (!ieee80211_is_valid_mode(priv->ieee, network->mode)) {
		IPW_DEBUG_ASSOC("Network '%s (" MAC_FMT ")' excluded "
				"because of invalid frequency/mode "
				"combination.\n",
				escape_essid(network->ssid, network->ssid_len),
				MAC_ARG(network->bssid));
		return 0;
	}
	
	ipw_compatible_rates(priv, network, &rates);
	if (rates.num_rates == 0) {
		IPW_DEBUG_ASSOC("Network '%s (" MAC_FMT ")' excluded "
				"because of no compatible rates.\n",
				escape_essid(network->ssid, network->ssid_len),
				MAC_ARG(network->bssid));
		return 0;
	}
	
	/* TODO: Perform any further minimal comparititive tests.  We do not
	 * want to put too much policy logic here; intelligent scan selection
	 * should occur within a generic IEEE 802.11 user space tool.  */

	/* Set up 'new' AP to this network */
	ipw_copy_rates(&match->rates, &rates);
	match->network = network;

	IPW_DEBUG_ASSOC("Network '%s (" MAC_FMT ")' is a viable match.\n",
			escape_essid(network->ssid, network->ssid_len),
			MAC_ARG(network->bssid));

	return 1;
}


static void ipw_adhoc_create(struct ipw_priv *priv, 
			    struct ieee80211_network *network)
{
	/*
	 * For the purposes of scanning, we can set our wireless mode
	 * to trigger scans across combinations of bands, but when it
	 * comes to creating a new ad-hoc network, we have tell the FW
	 * exactly which band to use.
	 *
	 * We also have the possibility of an invalid channel for the 
	 * chossen band.  Attempting to create a new ad-hoc network
	 * with an invalid channel for wireless mode will trigger a
	 * FW fatal error.
	 */
	network->mode = is_valid_channel(priv->ieee->mode, priv->channel);
	if (network->mode) {
		network->channel = priv->channel;
	} else {
		IPW_WARNING("Overriding invalid channel\n");
		if (priv->ieee->mode & IEEE_A) {
			network->mode = IEEE_A;
			priv->channel = band_a_active_channel[0];
		} else if (priv->ieee->mode & IEEE_G) {
			network->mode = IEEE_G;
			priv->channel = band_b_active_channel[0];
		} else {
			network->mode = IEEE_B;
			priv->channel = band_b_active_channel[0];
		}
	}

	network->channel = priv->channel;
	priv->config |= CFG_ADHOC_PERSIST;
	ipw_create_bssid(priv, network->bssid);
	network->ssid_len = priv->essid_len;
	memcpy(network->ssid, priv->essid, priv->essid_len);
	memset(&network->stats, 0, sizeof(network->stats));
	network->capability = WLAN_CAPABILITY_IBSS;
	if (priv->capability & CAP_PRIVACY_ON)
		network->capability |= WLAN_CAPABILITY_PRIVACY;
	network->rates_len = min(priv->rates.num_rates, MAX_RATES_LENGTH);
	memcpy(network->rates, priv->rates.supported_rates, 
	       network->rates_len);
	network->rates_ex_len = priv->rates.num_rates - network->rates_len;
	memcpy(network->rates_ex, 
	       &priv->rates.supported_rates[network->rates_len],
	       network->rates_ex_len);
	network->last_scanned = 0;
	network->flags = 0;
	network->last_associate = 0;
	network->time_stamp[0] = 0;
	network->time_stamp[1] = 0;
	network->beacon_interval = 100; /* Default */
	network->listen_interval = 10;  /* Default */
	network->atim_window = 0;       /* Default */
#ifdef CONFIG_IEEE80211_WPA		
	network->wpa_ie_len = 0;
	network->rsn_ie_len = 0;
#endif /* CONFIG_IEEE80211_WPA */	
}

static void ipw_send_wep_keys(struct ipw_priv *priv)
{
	struct ipw_wep_key *key;
	int i;
	struct host_cmd cmd = {
		.cmd = IPW_CMD_WEP_KEY,
		.len = sizeof(*key)
	};

	key = (struct ipw_wep_key *)&cmd.param;
	key->cmd_id = DINO_CMD_WEP_KEY;
	key->seq_num = 0;

	for (i = 0; i < 4; i++) { 
		key->key_index = i;
		if (!(priv->sec.flags & (1 << i))) {
			key->key_size = 0;
		} else {
			key->key_size = priv->sec.key_sizes[i];
			memcpy(key->key, priv->sec.keys[i], key->key_size);
		}

		if (ipw_send_cmd(priv, &cmd)) {
			IPW_ERROR("failed to send WEP_KEY command\n");
			return;
		}
	}   
}

static void ipw_adhoc_check(void *data)
{
	struct ipw_priv *priv = data;
	
	if (priv->missed_adhoc_beacons++ > priv->missed_beacon_threshold &&
	    !(priv->config & CFG_ADHOC_PERSIST)) {
		IPW_DEBUG_SCAN("Disassociating due to missed beacons\n");
		ipw_remove_current_network(priv);
		ipw_disassociate(priv);
		return;
	}

	queue_delayed_work(priv->workqueue, &priv->adhoc_check, 
			   priv->assoc_request.beacon_interval);
}

#ifdef CONFIG_IPW_DEBUG
static void ipw_debug_config(struct ipw_priv *priv)
{
	IPW_DEBUG_INFO("Scan completed, no valid APs matched "
		       "[CFG 0x%08X]\n", priv->config);
	if (priv->config & CFG_STATIC_CHANNEL)
		IPW_DEBUG_INFO("Channel locked to %d\n", 
			       priv->channel);
	else
		IPW_DEBUG_INFO("Channel unlocked.\n");
	if (priv->config & CFG_STATIC_ESSID)
		IPW_DEBUG_INFO("ESSID locked to '%s'\n", 
			       escape_essid(priv->essid, 
					    priv->essid_len));
	else
		IPW_DEBUG_INFO("ESSID unlocked.\n");
	if (priv->config & CFG_STATIC_BSSID)
		IPW_DEBUG_INFO("BSSID locked to %d\n", priv->channel);
	else
		IPW_DEBUG_INFO("BSSID unlocked.\n");
	if (priv->capability & CAP_PRIVACY_ON)
		IPW_DEBUG_INFO("PRIVACY on\n");
	else
		IPW_DEBUG_INFO("PRIVACY off\n");
	IPW_DEBUG_INFO("RATE MASK: 0x%08X\n", priv->rates_mask);
}
#else
#define ipw_debug_config(x) do {} while (0);
#endif

static inline void ipw_set_fixed_rate(struct ipw_priv *priv,
				      struct ieee80211_network *network)
{
	/* TODO: Verify that this works... */
	struct ipw_fixed_rate fr = {
		.tx_rates = priv->rates_mask
	};
	u32 reg;
	u16 mask = 0;

	/* Identify 'current FW band' and match it with the fixed 
	 * Tx rates */
		
	switch (priv->ieee->freq_band) {
	case IEEE80211_52GHZ_BAND: /* A only */
		/* IEEE_A */
		if (priv->rates_mask & ~IEEE80211_OFDM_RATES_MASK) {
			/* Invalid fixed rate mask */
			fr.tx_rates = 0;
			break;
		}
			
		fr.tx_rates >>= IEEE80211_OFDM_SHIFT_MASK_A;
		break;

	default: /* 2.4Ghz or Mixed */
		/* IEEE_B */
		if (network->mode == IEEE_B) {
			if (fr.tx_rates & ~IEEE80211_CCK_RATES_MASK) {
				/* Invalid fixed rate mask */
				fr.tx_rates = 0;
			}
			break;
		} 

		/* IEEE_G */
		if (fr.tx_rates & ~(IEEE80211_CCK_RATES_MASK |
				    IEEE80211_OFDM_RATES_MASK)) {
			/* Invalid fixed rate mask */
			fr.tx_rates = 0;
			break;
		}

		if (IEEE80211_OFDM_RATE_6MB_MASK & fr.tx_rates) {
			mask |= (IEEE80211_OFDM_RATE_6MB_MASK >> 1);
			fr.tx_rates &= ~IEEE80211_OFDM_RATE_6MB_MASK;
		}
		
		if (IEEE80211_OFDM_RATE_9MB_MASK & fr.tx_rates) {
			mask |= (IEEE80211_OFDM_RATE_9MB_MASK >> 1);
			fr.tx_rates &= ~IEEE80211_OFDM_RATE_9MB_MASK;
		}
		
		if (IEEE80211_OFDM_RATE_12MB_MASK & fr.tx_rates) {
			mask |= (IEEE80211_OFDM_RATE_12MB_MASK >> 1);
			fr.tx_rates &= ~IEEE80211_OFDM_RATE_12MB_MASK;
		}
		
		fr.tx_rates |= mask;
		break;
	}

	reg = ipw_read32(priv, IPW_MEM_FIXED_OVERRIDE);
	ipw_write_reg32(priv, reg, *(u32*)&fr);
}

static int ipw_associate_network(struct ipw_priv *priv,
				 struct ieee80211_network *network,
				 struct ipw_supported_rates *rates,
				 int roaming)
{
	int err;

	if (priv->config & CFG_FIXED_RATE)
		ipw_set_fixed_rate(priv, network);

	if (!(priv->config & CFG_STATIC_ESSID)) {
		priv->essid_len = min(network->ssid_len, 
				      (u8)IW_ESSID_MAX_SIZE);
		memcpy(priv->essid, network->ssid, priv->essid_len);
	}

	network->last_associate = jiffies;

	memset(&priv->assoc_request, 0, sizeof(priv->assoc_request));
	priv->assoc_request.channel = network->channel;
	if ((priv->capability & CAP_PRIVACY_ON) &&
	    (priv->capability & CAP_SHARED_KEY)) {
		priv->assoc_request.auth_type = AUTH_SHARED_KEY;
		priv->assoc_request.auth_key = priv->sec.active_key;
	} else {
		priv->assoc_request.auth_type = AUTH_OPEN;
		priv->assoc_request.auth_key = 0;
	}

	if (priv->capability & CAP_PRIVACY_ON) 
		ipw_send_wep_keys(priv);

	/* 
	 * It is valid for our ieee device to support multiple modes, but 
	 * when it comes to associating to a given network we have to choose 
	 * just one mode.
	 */
	if (network->mode & priv->ieee->mode & IEEE_A)
		priv->assoc_request.ieee_mode = IPW_A_MODE;
	else if (network->mode & priv->ieee->mode & IEEE_G)
		priv->assoc_request.ieee_mode = IPW_G_MODE;
	else if (network->mode & priv->ieee->mode & IEEE_B)
		priv->assoc_request.ieee_mode = IPW_B_MODE;

	IPW_DEBUG_ASSOC("%sssocation attempt: '%s', channel %d, "
			"802.11%c [%d], enc=%s%s%s%c%c\n",
			roaming ? "Rea" : "A",
			escape_essid(priv->essid, priv->essid_len), 
			network->channel, 
			ipw_modes[priv->assoc_request.ieee_mode], 
			rates->num_rates, 
			priv->capability & CAP_PRIVACY_ON ? "on " : "off",
			priv->capability & CAP_PRIVACY_ON ? 
			(priv->capability & CAP_SHARED_KEY ? "(shared)" : 
			 "(open)") : "",
			priv->capability & CAP_PRIVACY_ON ? " key=" : "",
			priv->capability & CAP_PRIVACY_ON ? 
			'1' + priv->sec.active_key : '.',
			priv->capability & CAP_PRIVACY_ON ? 
			'.' : ' ');

	priv->assoc_request.beacon_interval = network->beacon_interval;
	if ((priv->ieee->iw_mode == IW_MODE_ADHOC) &&
	    (network->time_stamp[0] == 0) &&
	    (network->time_stamp[1] == 0)) {
		priv->assoc_request.assoc_type = HC_IBSS_START;
		priv->assoc_request.assoc_tsf_msw = 0;
		priv->assoc_request.assoc_tsf_lsw = 0;
	} else {
		if (unlikely(roaming))
			priv->assoc_request.assoc_type = HC_REASSOCIATE;
		else
			priv->assoc_request.assoc_type = HC_ASSOCIATE;
		priv->assoc_request.assoc_tsf_msw = network->time_stamp[1];
		priv->assoc_request.assoc_tsf_lsw = network->time_stamp[0];
	}

	memcpy(&priv->assoc_request.bssid, network->bssid, ETH_ALEN);

	if (priv->ieee->iw_mode == IW_MODE_ADHOC) {
		memset(&priv->assoc_request.dest, 0xFF, ETH_ALEN);
		priv->assoc_request.atim_window = network->atim_window;
	} else {
		memcpy(&priv->assoc_request.dest, network->bssid, 
		       ETH_ALEN);
		priv->assoc_request.atim_window = 0;
	}

	priv->assoc_request.capability = network->capability;
	priv->assoc_request.listen_interval = network->listen_interval;
	
	err = ipw_send_ssid(priv, priv->essid, priv->essid_len);
	if (err) {
		IPW_DEBUG_HC("Attempt to send SSID command failed.\n");
		return err;
	}

	rates->ieee_mode = priv->assoc_request.ieee_mode;
	rates->purpose = IPW_RATE_CONNECT;
	ipw_send_supported_rates(priv, rates);
	
	if (priv->assoc_request.ieee_mode == IPW_G_MODE)
		priv->sys_config.dot11g_auto_detection = 1;
	else
		priv->sys_config.dot11g_auto_detection = 0;
	err = ipw_send_system_config(priv, &priv->sys_config);
	if (err) {
		IPW_DEBUG_HC("Attempt to send sys config command failed.\n");
		return err;
	}
	
	IPW_DEBUG_ASSOC("Association sensitivity: %d\n", network->stats.rssi);
	err = ipw_set_sensitivity(priv, network->stats.rssi);
	if (err) {
		IPW_DEBUG_HC("Attempt to send associate command failed.\n");
		return err;
	}

	/*
	 * If preemption is enabled, it is possible for the association
	 * to complete before we return from ipw_send_associate.  Therefore
	 * we have to be sure and update our priviate data first.
	 */
	priv->channel = network->channel;
	memcpy(priv->bssid, network->bssid, ETH_ALEN);
	priv->status |= STATUS_ASSOCIATING;	
	priv->status &= ~STATUS_SECURITY_UPDATED;

	priv->assoc_network = network;

	err = ipw_send_associate(priv, &priv->assoc_request);
	if (err) {
		IPW_DEBUG_HC("Attempt to send associate command failed.\n");
		return err;
	}
	
	IPW_DEBUG(IPW_DL_STATE, "associating: '%s' " MAC_FMT " \n", 
		  escape_essid(priv->essid, priv->essid_len),
		  MAC_ARG(priv->bssid));

	return 0;
}

static void ipw_roam(void *data)
{
	struct ipw_priv *priv = data;
	struct ieee80211_network *network = NULL;
	struct ipw_network_match match = {
		.network = priv->assoc_network
	};

	/* The roaming process is as follows:
	 * 
	 * 1.  Missed beacon threshold triggers the roaming process by 
	 *     setting the status ROAM bit and requesting a scan.
	 * 2.  When the scan completes, it schedules the ROAM work
	 * 3.  The ROAM work looks at all of the known networks for one that
	 *     is a better network than the currently associated.  If none
	 *     found, the ROAM process is over (ROAM bit cleared)
	 * 4.  If a better network is found, a disassociation request is
	 *     sent.
	 * 5.  When the disassociation completes, the roam work is again
	 *     scheduled.  The second time through, the driver is no longer
	 *     associated, and the newly selected network is sent an
	 *     association request.  
	 * 6.  At this point ,the roaming process is complete and the ROAM
	 *     status bit is cleared.
	 */

	/* If we are no longer associated, and the roaming bit is no longer
	 * set, then we are not actively roaming, so just return */
	if (!(priv->status & (STATUS_ASSOCIATED | STATUS_ROAMING)))
		return;
	
	if (priv->status & STATUS_ASSOCIATED) {
		/* First pass through ROAM process -- look for a better 
		 * network */
		u8 rssi = priv->assoc_network->stats.rssi;
		priv->assoc_network->stats.rssi = -128;
		list_for_each_entry(network, &priv->ieee->network_list, list) {
			if (network != priv->assoc_network)
				ipw_best_network(priv, &match, network, 1);
		}
		priv->assoc_network->stats.rssi = rssi;
		
		if (match.network == priv->assoc_network) {
			IPW_DEBUG_ASSOC("No better APs in this network to "
					"roam to.\n");
			priv->status &= ~STATUS_ROAMING;
			ipw_debug_config(priv);
			return;
		}
		
		ipw_send_disassociate(priv, 1);
		priv->assoc_network = match.network;

		return;
	} 

	/* Second pass through ROAM process -- request association */
	ipw_compatible_rates(priv, priv->assoc_network, &match.rates);
	ipw_associate_network(priv, priv->assoc_network, &match.rates, 1);
	priv->status &= ~STATUS_ROAMING;
}

static void ipw_associate(void *data)
{
	struct ipw_priv *priv = data;

	struct ieee80211_network *network = NULL;
	struct ipw_network_match match = {
		.network = NULL
	};
	struct ipw_supported_rates *rates;
	struct list_head *element;

	if (!(priv->config & CFG_ASSOCIATE) &&
	    !(priv->config & (CFG_STATIC_ESSID |
			      CFG_STATIC_CHANNEL |
			      CFG_STATIC_BSSID))) {
		IPW_DEBUG_ASSOC("Not attempting association (associate=0)\n");
		return;
	}

	list_for_each_entry(network, &priv->ieee->network_list, list) 
		ipw_best_network(priv, &match, network, 0);

	network = match.network;
	rates = &match.rates;

	if (network == NULL &&
	    priv->ieee->iw_mode == IW_MODE_ADHOC &&
	    priv->config & CFG_ADHOC_CREATE &&
	    priv->config & CFG_STATIC_ESSID &&
	    !list_empty(&priv->ieee->network_free_list)) {
		element = priv->ieee->network_free_list.next;
		network = list_entry(element, struct ieee80211_network, 
				     list);
		ipw_adhoc_create(priv, network);
		rates = &priv->rates;
		list_del(element);
		list_add_tail(&network->list, &priv->ieee->network_list);
	}
	    
	/* If we reached the end of the list, then we don't have any valid
	 * matching APs */
	if (!network) {
		ipw_debug_config(priv);

		queue_delayed_work(priv->workqueue, &priv->request_scan, 
				   SCAN_INTERVAL);
		
		return;
	}

	ipw_associate_network(priv, network, rates, 0);
}
	
static inline void ipw_handle_data_packet(struct ipw_priv *priv, 
					      struct ipw_rx_mem_buffer *rxb,
					      struct ieee80211_rx_stats *stats)
{
	struct ipw_rx_packet *pkt = (struct ipw_rx_packet *)rxb->skb->data;

	/* We received data from the HW, so stop the watchdog */
	priv->net_dev->trans_start = jiffies;

	/* We only process data packets if the 
	 * interface is open */
	if (unlikely((pkt->u.frame.length + IPW_RX_FRAME_SIZE) > 
		     skb_tailroom(rxb->skb))) {
		priv->ieee->stats.rx_errors++;
		priv->wstats.discard.misc++;
		IPW_DEBUG_DROP("Corruption detected! Oh no!\n");
		return;
	} else if (unlikely(!netif_running(priv->net_dev))) {
		priv->ieee->stats.rx_dropped++;
		priv->wstats.discard.misc++;
		IPW_DEBUG_DROP("Dropping packet while interface is not up.\n");
		return;
	}

	/* Advance skb->data to the start of the actual payload */
4840
	skb_reserve(rxb->skb, offsetof(struct ipw_rx_packet, u.frame.data));
J
James Ketrenos 已提交
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	/* Set the size of the skb to the size of the frame */
	skb_put(rxb->skb, pkt->u.frame.length);

	IPW_DEBUG_RX("Rx packet of %d bytes.\n", rxb->skb->len);

	if (!ieee80211_rx(priv->ieee, rxb->skb, stats)) 
		priv->ieee->stats.rx_errors++;
	else /* ieee80211_rx succeeded, so it now owns the SKB */
		rxb->skb = NULL;
}


/*
 * Main entry function for recieving a packet with 80211 headers.  This
 * should be called when ever the FW has notified us that there is a new
 * skb in the recieve queue.
 */
static void ipw_rx(struct ipw_priv *priv)
{
	struct ipw_rx_mem_buffer *rxb;
	struct ipw_rx_packet *pkt;
	struct ieee80211_hdr *header;
	u32 r, w, i;
	u8 network_packet;

	r = ipw_read32(priv, CX2_RX_READ_INDEX);
	w = ipw_read32(priv, CX2_RX_WRITE_INDEX);
	i = (priv->rxq->processed + 1) % RX_QUEUE_SIZE;

	while (i != r) {
		rxb = priv->rxq->queue[i];
#ifdef CONFIG_IPW_DEBUG
		if (unlikely(rxb == NULL)) {
			printk(KERN_CRIT "Queue not allocated!\n");
			break;
		}
#endif
		priv->rxq->queue[i] = NULL;

		pci_dma_sync_single_for_cpu(priv->pci_dev, rxb->dma_addr,
					    CX2_RX_BUF_SIZE, 
					    PCI_DMA_FROMDEVICE);

		pkt = (struct ipw_rx_packet *)rxb->skb->data;
		IPW_DEBUG_RX("Packet: type=%02X seq=%02X bits=%02X\n",
			     pkt->header.message_type,
			     pkt->header.rx_seq_num,
			     pkt->header.control_bits);

		switch (pkt->header.message_type) {
		case RX_FRAME_TYPE: /* 802.11 frame */ {
			struct ieee80211_rx_stats stats = {
				.rssi = pkt->u.frame.rssi_dbm - 
				IPW_RSSI_TO_DBM,
				.signal = pkt->u.frame.signal,
				.rate = pkt->u.frame.rate,
				.mac_time = jiffies,
	       			.received_channel = 
				pkt->u.frame.received_channel,
				.freq = (pkt->u.frame.control & (1<<0)) ? 
				IEEE80211_24GHZ_BAND : IEEE80211_52GHZ_BAND,
				.len = pkt->u.frame.length,
			};

			if (stats.rssi != 0)
				stats.mask |= IEEE80211_STATMASK_RSSI;
			if (stats.signal != 0)
				stats.mask |= IEEE80211_STATMASK_SIGNAL;
			if (stats.rate != 0)
				stats.mask |= IEEE80211_STATMASK_RATE;

			priv->rx_packets++;

#ifdef CONFIG_IPW_PROMISC
			if (priv->ieee->iw_mode == IW_MODE_MONITOR) {
				ipw_handle_data_packet(priv, rxb, &stats);
				break;
			}
#endif
			
			header = (struct ieee80211_hdr *)(rxb->skb->data + 
							  IPW_RX_FRAME_SIZE);
				/* TODO: Check Ad-Hoc dest/source and make sure
				 * that we are actually parsing these packets
				 * correctly -- we should probably use the 
				 * frame control of the packet and disregard
				 * the current iw_mode */
			switch (priv->ieee->iw_mode) {
			case IW_MODE_ADHOC:
				network_packet = 
					!memcmp(header->addr1, 
						priv->net_dev->dev_addr, 
						ETH_ALEN) ||
					!memcmp(header->addr3, 
						priv->bssid, ETH_ALEN) ||
					is_broadcast_ether_addr(header->addr1) ||
					is_multicast_ether_addr(header->addr1);
				break;

			case IW_MODE_INFRA:
			default:
				network_packet = 
					!memcmp(header->addr3, 
						priv->bssid, ETH_ALEN) ||
					!memcmp(header->addr1, 
						priv->net_dev->dev_addr, 
						ETH_ALEN) ||
					is_broadcast_ether_addr(header->addr1) ||
					is_multicast_ether_addr(header->addr1);
				break;
			}
			
			if (network_packet && priv->assoc_network) {
				priv->assoc_network->stats.rssi = stats.rssi;
				average_add(&priv->average_rssi, 
					    stats.rssi);
				priv->last_rx_rssi = stats.rssi;
			}

			IPW_DEBUG_RX("Frame: len=%u\n", pkt->u.frame.length);

			if (pkt->u.frame.length < frame_hdr_len(header)) {
				IPW_DEBUG_DROP("Received packet is too small. "
					       "Dropping.\n");
				priv->ieee->stats.rx_errors++;
				priv->wstats.discard.misc++;
				break;
			}
			
			switch (WLAN_FC_GET_TYPE(header->frame_ctl)) {
			case IEEE80211_FTYPE_MGMT:
				ieee80211_rx_mgt(priv->ieee, header, &stats);
				if (priv->ieee->iw_mode == IW_MODE_ADHOC &&
				    ((WLAN_FC_GET_STYPE(header->frame_ctl) ==
				      IEEE80211_STYPE_PROBE_RESP) ||
				     (WLAN_FC_GET_STYPE(header->frame_ctl) ==
				      IEEE80211_STYPE_BEACON)) &&
				    !memcmp(header->addr3, priv->bssid, ETH_ALEN))
					ipw_add_station(priv, header->addr2);
				break;
				
			case IEEE80211_FTYPE_CTL:
				break;
				
			case IEEE80211_FTYPE_DATA:
				if (network_packet)
					ipw_handle_data_packet(priv, rxb, &stats);
				else
					IPW_DEBUG_DROP("Dropping: " MAC_FMT 
						       ", " MAC_FMT ", " MAC_FMT "\n",
						       MAC_ARG(header->addr1), MAC_ARG(header->addr2), 
						       MAC_ARG(header->addr3));
				break;
			}
			break;
		}

		case RX_HOST_NOTIFICATION_TYPE: {
			IPW_DEBUG_RX("Notification: subtype=%02X flags=%02X size=%d\n",
				     pkt->u.notification.subtype,
				     pkt->u.notification.flags,
				     pkt->u.notification.size);
			ipw_rx_notification(priv, &pkt->u.notification);
			break;
		}

		default:
			IPW_DEBUG_RX("Bad Rx packet of type %d\n",
				     pkt->header.message_type);
			break;
		}
		
		/* 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) {
			dev_kfree_skb_any(rxb->skb);
			rxb->skb = NULL;
		}
		
		pci_unmap_single(priv->pci_dev, rxb->dma_addr,
				 CX2_RX_BUF_SIZE, PCI_DMA_FROMDEVICE);
		list_add_tail(&rxb->list, &priv->rxq->rx_used);
		
		i = (i + 1) % RX_QUEUE_SIZE;
	}

	/* Backtrack one entry */
	priv->rxq->processed = (i ? i : RX_QUEUE_SIZE) - 1;

	ipw_rx_queue_restock(priv);
}

static void ipw_abort_scan(struct ipw_priv *priv)
{
	int err;

	if (priv->status & STATUS_SCAN_ABORTING) {
		IPW_DEBUG_HC("Ignoring concurrent scan abort request.\n");
		return;
	}
	priv->status |= STATUS_SCAN_ABORTING;

	err = ipw_send_scan_abort(priv);
	if (err) 
		IPW_DEBUG_HC("Request to abort scan failed.\n");
}

static int ipw_request_scan(struct ipw_priv *priv)
{
	struct ipw_scan_request_ext scan;
	int channel_index = 0;
	int i, err, scan_type;
	
	if (priv->status & STATUS_EXIT_PENDING) {
		IPW_DEBUG_SCAN("Aborting scan due to device shutdown\n");
		priv->status |= STATUS_SCAN_PENDING;
		return 0;
	}

	if (priv->status & STATUS_SCANNING) {
		IPW_DEBUG_HC("Concurrent scan requested.  Aborting first.\n");
		priv->status |= STATUS_SCAN_PENDING;
		ipw_abort_scan(priv);
		return 0;
	}
	
	if (priv->status & STATUS_SCAN_ABORTING) {
		IPW_DEBUG_HC("Scan request while abort pending.  Queuing.\n");
		priv->status |= STATUS_SCAN_PENDING;
		return 0;
	}

	if (priv->status & STATUS_RF_KILL_MASK) {
		IPW_DEBUG_HC("Aborting scan due to RF Kill activation\n");
		priv->status |= STATUS_SCAN_PENDING;
		return 0;
	}

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

	scan.dwell_time[IPW_SCAN_ACTIVE_BROADCAST_SCAN] = 20;
	scan.dwell_time[IPW_SCAN_ACTIVE_BROADCAST_AND_DIRECT_SCAN] = 20;
	scan.dwell_time[IPW_SCAN_PASSIVE_FULL_DWELL_SCAN] = 20;

	scan.full_scan_index = ieee80211_get_scans(priv->ieee);
	/* If we are roaming, then make this a directed scan for the current
	 * network.  Otherwise, ensure that every other scan is a fast 
	 * channel hop scan */
	if ((priv->status & STATUS_ROAMING) || (
		    !(priv->status & STATUS_ASSOCIATED) && 
		    (priv->config & CFG_STATIC_ESSID) && 
		    (scan.full_scan_index % 2))) {
		err = ipw_send_ssid(priv, priv->essid, priv->essid_len);
		if (err) {
			IPW_DEBUG_HC("Attempt to send SSID command failed.\n");
			return err;
		}
		
		scan_type = IPW_SCAN_ACTIVE_BROADCAST_AND_DIRECT_SCAN;
	} else {
		scan_type = IPW_SCAN_ACTIVE_BROADCAST_SCAN;
	}
	
        if (priv->ieee->freq_band & IEEE80211_52GHZ_BAND) {
		int start = channel_index;
		for (i = 0; i < MAX_A_CHANNELS; i++) {
			if (band_a_active_channel[i] == 0)
				break;
			if ((priv->status & STATUS_ASSOCIATED) &&
			    band_a_active_channel[i] == priv->channel)
				continue;
			channel_index++;
			scan.channels_list[channel_index] = 
				band_a_active_channel[i];
			ipw_set_scan_type(&scan, channel_index, scan_type);
		}
		
		if (start != channel_index) {
			scan.channels_list[start] = (u8)(IPW_A_MODE << 6) | 
				(channel_index - start);
			channel_index++;
		}
	}

        if (priv->ieee->freq_band & IEEE80211_24GHZ_BAND) {
		int start = channel_index;
		for (i = 0; i < MAX_B_CHANNELS; i++) {
			if (band_b_active_channel[i] == 0)
				break;
			if ((priv->status & STATUS_ASSOCIATED) &&
			    band_b_active_channel[i] == priv->channel)
				continue;
			channel_index++;
			scan.channels_list[channel_index] = 
				band_b_active_channel[i];
			ipw_set_scan_type(&scan, channel_index, scan_type);
		}

		if (start != channel_index) {
			scan.channels_list[start] = (u8)(IPW_B_MODE << 6) | 
				(channel_index - start);
		}
	}
	
	err = ipw_send_scan_request_ext(priv, &scan);
	if (err) {
		IPW_DEBUG_HC("Sending scan command failed: %08X\n",
			     err);
		return -EIO;
	}

	priv->status |= STATUS_SCANNING;
	priv->status &= ~STATUS_SCAN_PENDING;

	return 0;
}

/*
 * This file defines the Wireless Extension handlers.  It does not
 * define any methods of hardware manipulation and relies on the
 * functions defined in ipw_main to provide the HW interaction.
 * 
 * The exception to this is the use of the ipw_get_ordinal() 
 * function used to poll the hardware vs. making unecessary calls.
 *
 */

static int ipw_wx_get_name(struct net_device *dev, 
			   struct iw_request_info *info, 
			   union iwreq_data *wrqu, char *extra)
{
	struct ipw_priv *priv = ieee80211_priv(dev);
	if (!(priv->status & STATUS_ASSOCIATED))
		strcpy(wrqu->name, "unassociated");
	else 
		snprintf(wrqu->name, IFNAMSIZ, "IEEE 802.11%c",
			 ipw_modes[priv->assoc_request.ieee_mode]);
	IPW_DEBUG_WX("Name: %s\n", wrqu->name);
	return 0;
}

static int ipw_set_channel(struct ipw_priv *priv, u8 channel)
{
	if (channel == 0) {
		IPW_DEBUG_INFO("Setting channel to ANY (0)\n");
		priv->config &= ~CFG_STATIC_CHANNEL;
		if (!(priv->status & (STATUS_SCANNING | STATUS_ASSOCIATED |
				      STATUS_ASSOCIATING))) {
			IPW_DEBUG_ASSOC("Attempting to associate with new "
					"parameters.\n");
			ipw_associate(priv);
		}

		return 0;
	}

	priv->config |= CFG_STATIC_CHANNEL;

	if (priv->channel == channel) {
		IPW_DEBUG_INFO(
			"Request to set channel to current value (%d)\n",
			channel);
		return 0;
	}

	IPW_DEBUG_INFO("Setting channel to %i\n", (int)channel);
	priv->channel = channel;

	/* If we are currently associated, or trying to associate
	 * then see if this is a new channel (causing us to disassociate) */
	if (priv->status & (STATUS_ASSOCIATED | STATUS_ASSOCIATING)) {
		IPW_DEBUG_ASSOC("Disassociating due to channel change.\n");
		ipw_disassociate(priv);
	} else {
		ipw_associate(priv);
	}

	return 0;
}

static int ipw_wx_set_freq(struct net_device *dev, 
			   struct iw_request_info *info, 
			   union iwreq_data *wrqu, char *extra) 
{
	struct ipw_priv *priv = ieee80211_priv(dev);
	struct iw_freq *fwrq = &wrqu->freq;
	
	/* if setting by freq convert to channel */
	if (fwrq->e == 1) {
		if ((fwrq->m >= (int) 2.412e8 &&
		     fwrq->m <= (int) 2.487e8)) {
			int f = fwrq->m / 100000;
			int c = 0;
			
			while ((c < REG_MAX_CHANNEL) &&
			       (f != ipw_frequencies[c]))
				c++;
			
			/* hack to fall through */
			fwrq->e = 0;
			fwrq->m = c + 1;
		}
	}
	
	if (fwrq->e > 0 || fwrq->m > 1000) 
		return -EOPNOTSUPP;

	IPW_DEBUG_WX("SET Freq/Channel -> %d \n", fwrq->m);
	return ipw_set_channel(priv, (u8)fwrq->m);
	
	return 0;
}


static int ipw_wx_get_freq(struct net_device *dev, 
			   struct iw_request_info *info, 
			   union iwreq_data *wrqu, char *extra)
{
	struct ipw_priv *priv = ieee80211_priv(dev);

	wrqu->freq.e = 0;

	/* If we are associated, trying to associate, or have a statically
	 * configured CHANNEL then return that; otherwise return ANY */
	if (priv->config & CFG_STATIC_CHANNEL ||
	    priv->status & (STATUS_ASSOCIATING | STATUS_ASSOCIATED))
		wrqu->freq.m = priv->channel;
	else 
		wrqu->freq.m = 0;

	IPW_DEBUG_WX("GET Freq/Channel -> %d \n", priv->channel);
	return 0;
}

static int ipw_wx_set_mode(struct net_device *dev, 
			   struct iw_request_info *info, 
			   union iwreq_data *wrqu, char *extra)
{
	struct ipw_priv *priv = ieee80211_priv(dev);
	int err = 0;

	IPW_DEBUG_WX("Set MODE: %d\n", wrqu->mode);

	if (wrqu->mode == priv->ieee->iw_mode)
		return 0;

	switch (wrqu->mode) {
#ifdef CONFIG_IPW_PROMISC
	case IW_MODE_MONITOR:
#endif
	case IW_MODE_ADHOC:
	case IW_MODE_INFRA:
		break;
	case IW_MODE_AUTO:
		wrqu->mode = IW_MODE_INFRA;
		break;
	default:
		return -EINVAL;
	}

#ifdef CONFIG_IPW_PROMISC
	if (priv->ieee->iw_mode == IW_MODE_MONITOR) 
		priv->net_dev->type = ARPHRD_ETHER;
	
	if (wrqu->mode == IW_MODE_MONITOR) 
		priv->net_dev->type = ARPHRD_IEEE80211;
#endif /* CONFIG_IPW_PROMISC */
	
#ifdef CONFIG_PM
	/* Free the existing firmware and reset the fw_loaded 
	 * flag so ipw_load() will bring in the new firmawre */
	if (fw_loaded) {
		fw_loaded = 0;
	}

	release_firmware(bootfw);
	release_firmware(ucode);
	release_firmware(firmware);
	bootfw = ucode = firmware = NULL;
#endif

	priv->ieee->iw_mode = wrqu->mode;
	ipw_adapter_restart(priv);
	
 	return err;
}

static int ipw_wx_get_mode(struct net_device *dev, 
			       struct iw_request_info *info, 
			       union iwreq_data *wrqu, char *extra)
{
	struct ipw_priv *priv = ieee80211_priv(dev);

	wrqu->mode = priv->ieee->iw_mode;
	IPW_DEBUG_WX("Get MODE -> %d\n", wrqu->mode);

	return 0;
}


#define DEFAULT_RTS_THRESHOLD     2304U
#define MIN_RTS_THRESHOLD         1U
#define MAX_RTS_THRESHOLD         2304U
#define DEFAULT_BEACON_INTERVAL   100U
#define	DEFAULT_SHORT_RETRY_LIMIT 7U
#define	DEFAULT_LONG_RETRY_LIMIT  4U

/* 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 int ipw_wx_get_range(struct net_device *dev, 
			    struct iw_request_info *info, 
			    union iwreq_data *wrqu, char *extra)
{
	struct ipw_priv *priv = ieee80211_priv(dev);
	struct iw_range *range = (struct iw_range *)extra;
	u16 val;
	int i;

	wrqu->data.length = sizeof(*range);
	memset(range, 0, sizeof(*range));

	/* 54Mbs == ~27 Mb/s real (802.11g) */
	range->throughput = 27 * 1000 * 1000;     

	range->max_qual.qual = 100;
	/* TODO: Find real max RSSI and stick here */
	range->max_qual.level = 0;
	range->max_qual.noise = 0;
	range->max_qual.updated = 7; /* Updated all three */

	range->avg_qual.qual = 70;
	/* TODO: Find real 'good' to 'bad' threshol value for RSSI */
	range->avg_qual.level = 0; /* FIXME to real average level */
	range->avg_qual.noise = 0;
	range->avg_qual.updated = 7; /* Updated all three */

	range->num_bitrates = min(priv->rates.num_rates, (u8)IW_MAX_BITRATES);

	for (i = 0; i < range->num_bitrates; i++) 
		range->bitrate[i] = (priv->rates.supported_rates[i] & 0x7F) * 
			500000;
	
	range->max_rts = DEFAULT_RTS_THRESHOLD;
	range->min_frag = MIN_FRAG_THRESHOLD;
	range->max_frag = MAX_FRAG_THRESHOLD;

	range->encoding_size[0] = 5;
	range->encoding_size[1] = 13; 
	range->num_encoding_sizes = 2;
	range->max_encoding_tokens = WEP_KEYS;

	/* Set the Wireless Extension versions */
	range->we_version_compiled = WIRELESS_EXT;
	range->we_version_source = 16;

        range->num_channels = FREQ_COUNT;

	val = 0;
	for (i = 0; i < FREQ_COUNT; i++) {
		range->freq[val].i = i + 1;
		range->freq[val].m = ipw_frequencies[i] * 100000;
		range->freq[val].e = 1;
		val++;

		if (val == IW_MAX_FREQUENCIES)
			break;
	}
	range->num_frequency = val;

	IPW_DEBUG_WX("GET Range\n");
	return 0;
}

static int ipw_wx_set_wap(struct net_device *dev, 
			  struct iw_request_info *info, 
			  union iwreq_data *wrqu, char *extra)
{
	struct ipw_priv *priv = ieee80211_priv(dev);

	static const unsigned char any[] = {
		0xff, 0xff, 0xff, 0xff, 0xff, 0xff
	};
	static const unsigned char off[] = {
		0x00, 0x00, 0x00, 0x00, 0x00, 0x00
	};

	if (wrqu->ap_addr.sa_family != ARPHRD_ETHER) 
		return -EINVAL;

	if (!memcmp(any, wrqu->ap_addr.sa_data, ETH_ALEN) ||
	    !memcmp(off, wrqu->ap_addr.sa_data, ETH_ALEN)) {
		/* we disable mandatory BSSID association */
		IPW_DEBUG_WX("Setting AP BSSID to ANY\n");
		priv->config &= ~CFG_STATIC_BSSID;
		if (!(priv->status & (STATUS_SCANNING | STATUS_ASSOCIATED |
				      STATUS_ASSOCIATING))) {
			IPW_DEBUG_ASSOC("Attempting to associate with new "
					"parameters.\n");
			ipw_associate(priv);
		}

		return 0;
	}

	priv->config |= CFG_STATIC_BSSID;
	if (!memcmp(priv->bssid, wrqu->ap_addr.sa_data, ETH_ALEN)) {
		IPW_DEBUG_WX("BSSID set to current BSSID.\n");
		return 0;
	}

	IPW_DEBUG_WX("Setting mandatory BSSID to " MAC_FMT "\n",
		     MAC_ARG(wrqu->ap_addr.sa_data));

	memcpy(priv->bssid, wrqu->ap_addr.sa_data, ETH_ALEN);

	/* If we are currently associated, or trying to associate
	 * then see if this is a new BSSID (causing us to disassociate) */
	if (priv->status & (STATUS_ASSOCIATED | STATUS_ASSOCIATING)) {
		IPW_DEBUG_ASSOC("Disassociating due to BSSID change.\n");
		ipw_disassociate(priv);
	} else {
		ipw_associate(priv);
	}

	return 0;
}

static int ipw_wx_get_wap(struct net_device *dev, 
			  struct iw_request_info *info, 
			  union iwreq_data *wrqu, char *extra)
{
	struct ipw_priv *priv = ieee80211_priv(dev);
	/* If we are associated, trying to associate, or have a statically
	 * configured BSSID then return that; otherwise return ANY */
	if (priv->config & CFG_STATIC_BSSID || 
	    priv->status & (STATUS_ASSOCIATED | STATUS_ASSOCIATING)) {
		wrqu->ap_addr.sa_family = ARPHRD_ETHER;
		memcpy(wrqu->ap_addr.sa_data, &priv->bssid, ETH_ALEN);
	} else
		memset(wrqu->ap_addr.sa_data, 0, ETH_ALEN);

	IPW_DEBUG_WX("Getting WAP BSSID: " MAC_FMT "\n",
		     MAC_ARG(wrqu->ap_addr.sa_data));
	return 0;
}

static int ipw_wx_set_essid(struct net_device *dev, 
			    struct iw_request_info *info, 
			    union iwreq_data *wrqu, char *extra)
{
	struct ipw_priv *priv = ieee80211_priv(dev);
	char *essid = ""; /* ANY */
	int length = 0;
  
	if (wrqu->essid.flags && wrqu->essid.length) {
		length = wrqu->essid.length - 1;
		essid = extra;
	}
	if (length == 0) {
		IPW_DEBUG_WX("Setting ESSID to ANY\n");
		priv->config &= ~CFG_STATIC_ESSID;
		if (!(priv->status & (STATUS_SCANNING | STATUS_ASSOCIATED |
				      STATUS_ASSOCIATING))) {
			IPW_DEBUG_ASSOC("Attempting to associate with new "
					"parameters.\n");
			ipw_associate(priv);
		}

		return 0;
	}

	length = min(length, IW_ESSID_MAX_SIZE);

	priv->config |= CFG_STATIC_ESSID;

	if (priv->essid_len == length && !memcmp(priv->essid, extra, length)) {
		IPW_DEBUG_WX("ESSID set to current ESSID.\n");
		return 0;
	}

	IPW_DEBUG_WX("Setting ESSID: '%s' (%d)\n", escape_essid(essid, length),
		     length);

	priv->essid_len = length;
	memcpy(priv->essid, essid, priv->essid_len);
	
	/* If we are currently associated, or trying to associate
	 * then see if this is a new ESSID (causing us to disassociate) */
	if (priv->status & (STATUS_ASSOCIATED | STATUS_ASSOCIATING)) {
		IPW_DEBUG_ASSOC("Disassociating due to ESSID change.\n");
		ipw_disassociate(priv);
	} else {
		ipw_associate(priv);
	}

	return 0;
}

static int ipw_wx_get_essid(struct net_device *dev, 
			    struct iw_request_info *info, 
			    union iwreq_data *wrqu, char *extra)
{
	struct ipw_priv *priv = ieee80211_priv(dev);

	/* If we are associated, trying to associate, or have a statically
	 * configured ESSID then return that; otherwise return ANY */
	if (priv->config & CFG_STATIC_ESSID ||
	    priv->status & (STATUS_ASSOCIATED | STATUS_ASSOCIATING)) { 
		IPW_DEBUG_WX("Getting essid: '%s'\n", 
			     escape_essid(priv->essid, priv->essid_len));
		memcpy(extra, priv->essid, priv->essid_len); 
		wrqu->essid.length = priv->essid_len;
		wrqu->essid.flags = 1; /* active */
	} else {
		IPW_DEBUG_WX("Getting essid: ANY\n");
		wrqu->essid.length = 0;
		wrqu->essid.flags = 0; /* active */
	}

	return 0;
}

static int ipw_wx_set_nick(struct net_device *dev, 
			   struct iw_request_info *info, 
			   union iwreq_data *wrqu, char *extra)
{ 
	struct ipw_priv *priv = ieee80211_priv(dev);

	IPW_DEBUG_WX("Setting nick to '%s'\n", extra);
	if (wrqu->data.length > IW_ESSID_MAX_SIZE)
		return -E2BIG;

	wrqu->data.length = min((size_t)wrqu->data.length, sizeof(priv->nick));
	memset(priv->nick, 0, sizeof(priv->nick));
	memcpy(priv->nick, extra,  wrqu->data.length);
	IPW_DEBUG_TRACE("<<\n");
	return 0;

}


static int ipw_wx_get_nick(struct net_device *dev, 
			   struct iw_request_info *info, 
			   union iwreq_data *wrqu, char *extra)
{ 
	struct ipw_priv *priv = ieee80211_priv(dev);
	IPW_DEBUG_WX("Getting nick\n");
	wrqu->data.length = strlen(priv->nick) + 1;
	memcpy(extra, priv->nick, wrqu->data.length);
	wrqu->data.flags = 1; /* active */
	return 0;
}


static int ipw_wx_set_rate(struct net_device *dev,
			   struct iw_request_info *info,
			   union iwreq_data *wrqu, char *extra)
{ 
	IPW_DEBUG_WX("0x%p, 0x%p, 0x%p\n", dev, info, wrqu);
	return -EOPNOTSUPP; 
}

static int ipw_wx_get_rate(struct net_device *dev, 
			   struct iw_request_info *info, 
			   union iwreq_data *wrqu, char *extra)
{ 
	struct ipw_priv * priv = ieee80211_priv(dev);
	wrqu->bitrate.value = priv->last_rate;

	IPW_DEBUG_WX("GET Rate -> %d \n", wrqu->bitrate.value);
	return 0;
}


static int ipw_wx_set_rts(struct net_device *dev, 
			  struct iw_request_info *info, 
			  union iwreq_data *wrqu, char *extra)
{ 
	struct ipw_priv *priv = ieee80211_priv(dev);

	if (wrqu->rts.disabled)
		priv->rts_threshold = DEFAULT_RTS_THRESHOLD;
	else {
		if (wrqu->rts.value < MIN_RTS_THRESHOLD ||
		    wrqu->rts.value > MAX_RTS_THRESHOLD)
			return -EINVAL;
		
		priv->rts_threshold = wrqu->rts.value;
	}

	ipw_send_rts_threshold(priv, priv->rts_threshold);
	IPW_DEBUG_WX("SET RTS Threshold -> %d \n", priv->rts_threshold);
	return 0;
}

static int ipw_wx_get_rts(struct net_device *dev, 
			  struct iw_request_info *info, 
			  union iwreq_data *wrqu, char *extra)
{ 
	struct ipw_priv *priv = ieee80211_priv(dev);
	wrqu->rts.value = priv->rts_threshold;
	wrqu->rts.fixed = 0;	/* no auto select */
	wrqu->rts.disabled = 
		(wrqu->rts.value == DEFAULT_RTS_THRESHOLD);

	IPW_DEBUG_WX("GET RTS Threshold -> %d \n", wrqu->rts.value);
	return 0;
}


static int ipw_wx_set_txpow(struct net_device *dev, 
			    struct iw_request_info *info, 
			    union iwreq_data *wrqu, char *extra)
{ 
	struct ipw_priv *priv = ieee80211_priv(dev);
	struct ipw_tx_power tx_power;
	int i;

	if (ipw_radio_kill_sw(priv, wrqu->power.disabled))
		return -EINPROGRESS;

	if (wrqu->power.flags != IW_TXPOW_DBM)
		return -EINVAL;

	if ((wrqu->power.value > 20) || 
	    (wrqu->power.value < -12))
		return -EINVAL;

	priv->tx_power = wrqu->power.value;

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

	/* configure device for 'G' band */
	tx_power.ieee_mode = IPW_G_MODE;
	tx_power.num_channels = 11;
	for (i = 0; i < 11; i++) {
		tx_power.channels_tx_power[i].channel_number = i + 1;
		tx_power.channels_tx_power[i].tx_power = priv->tx_power;
	}
	if (ipw_send_tx_power(priv, &tx_power))
		goto error;

	/* configure device to also handle 'B' band */
	tx_power.ieee_mode = IPW_B_MODE;
	if (ipw_send_tx_power(priv, &tx_power))
		goto error;

	return 0;

 error:
	return -EIO;
}


static int ipw_wx_get_txpow(struct net_device *dev, 
			    struct iw_request_info *info, 
			    union iwreq_data *wrqu, char *extra)
{ 
	struct ipw_priv *priv = ieee80211_priv(dev);

	wrqu->power.value = priv->tx_power;
	wrqu->power.fixed = 1;
	wrqu->power.flags = IW_TXPOW_DBM;
	wrqu->power.disabled = (priv->status & STATUS_RF_KILL_MASK) ? 1 : 0;

	IPW_DEBUG_WX("GET TX Power -> %s %d \n", 
		     wrqu->power.disabled ? "ON" : "OFF",
		     wrqu->power.value);

	return 0;
}

static int ipw_wx_set_frag(struct net_device *dev, 
			       struct iw_request_info *info, 
			       union iwreq_data *wrqu, char *extra)
{
	struct ipw_priv *priv = ieee80211_priv(dev);

	if (wrqu->frag.disabled)
		priv->ieee->fts = DEFAULT_FTS;
	else {
		if (wrqu->frag.value < MIN_FRAG_THRESHOLD ||
		    wrqu->frag.value > MAX_FRAG_THRESHOLD)
			return -EINVAL;
		
		priv->ieee->fts = wrqu->frag.value & ~0x1;
	}

	ipw_send_frag_threshold(priv, wrqu->frag.value);
	IPW_DEBUG_WX("SET Frag Threshold -> %d \n", wrqu->frag.value);
	return 0;
}

static int ipw_wx_get_frag(struct net_device *dev, 
			       struct iw_request_info *info, 
			       union iwreq_data *wrqu, char *extra)
{
	struct ipw_priv *priv = ieee80211_priv(dev);
	wrqu->frag.value = priv->ieee->fts;
	wrqu->frag.fixed = 0;	/* no auto select */
	wrqu->frag.disabled = 
		(wrqu->frag.value == DEFAULT_FTS);

	IPW_DEBUG_WX("GET Frag Threshold -> %d \n", wrqu->frag.value);

	return 0;
}

static int ipw_wx_set_retry(struct net_device *dev, 
			    struct iw_request_info *info, 
			    union iwreq_data *wrqu, char *extra)
{ 
	IPW_DEBUG_WX("0x%p, 0x%p, 0x%p\n", dev, info, wrqu);
	return -EOPNOTSUPP; 
}


static int ipw_wx_get_retry(struct net_device *dev, 
			    struct iw_request_info *info, 
			    union iwreq_data *wrqu, char *extra)
{ 
	IPW_DEBUG_WX("0x%p, 0x%p, 0x%p\n", dev, info, wrqu);
	return -EOPNOTSUPP; 
}


static int ipw_wx_set_scan(struct net_device *dev, 
			   struct iw_request_info *info, 
			   union iwreq_data *wrqu, char *extra)
{
	struct ipw_priv *priv = ieee80211_priv(dev);
	IPW_DEBUG_WX("Start scan\n");
	if (ipw_request_scan(priv))
		return -EIO;
	return 0;
}

static int ipw_wx_get_scan(struct net_device *dev, 
			   struct iw_request_info *info, 
			   union iwreq_data *wrqu, char *extra)
{ 
	struct ipw_priv *priv = ieee80211_priv(dev);
	return ieee80211_wx_get_scan(priv->ieee, info, wrqu, extra);
}

static int ipw_wx_set_encode(struct net_device *dev, 
				 struct iw_request_info *info, 
				 union iwreq_data *wrqu, char *key)
{
	struct ipw_priv *priv = ieee80211_priv(dev);
	return ieee80211_wx_set_encode(priv->ieee, info, wrqu, key);
}

static int ipw_wx_get_encode(struct net_device *dev, 
				 struct iw_request_info *info, 
				 union iwreq_data *wrqu, char *key)
{
	struct ipw_priv *priv = ieee80211_priv(dev);
	return ieee80211_wx_get_encode(priv->ieee, info, wrqu, key);
}

static int ipw_wx_set_power(struct net_device *dev, 
			        struct iw_request_info *info, 
			        union iwreq_data *wrqu, char *extra)
{
	struct ipw_priv *priv = ieee80211_priv(dev);
	int err;

	if (wrqu->power.disabled) {
		priv->power_mode = IPW_POWER_LEVEL(priv->power_mode);
		err = ipw_send_power_mode(priv, IPW_POWER_MODE_CAM);
		if (err) {
			IPW_DEBUG_WX("failed setting power mode.\n");
			return err;
		}

		IPW_DEBUG_WX("SET Power Management Mode -> off\n");

		return 0;
	} 

	switch (wrqu->power.flags & IW_POWER_MODE) {
	case IW_POWER_ON:    /* If not specified */
	case IW_POWER_MODE:  /* If set all mask */
	case IW_POWER_ALL_R: /* If explicitely state all */
		break;
	default: /* Otherwise we don't support it */
		IPW_DEBUG_WX("SET PM Mode: %X not supported.\n",
			     wrqu->power.flags);
		return -EOPNOTSUPP; 
	}
	
	/* If the user hasn't specified a power management mode yet, default
	 * to BATTERY */
        if (IPW_POWER_LEVEL(priv->power_mode) == IPW_POWER_AC)
		priv->power_mode = IPW_POWER_ENABLED | IPW_POWER_BATTERY;
	else 
		priv->power_mode = IPW_POWER_ENABLED | priv->power_mode;
	err = ipw_send_power_mode(priv, IPW_POWER_LEVEL(priv->power_mode));
	if (err) {
		IPW_DEBUG_WX("failed setting power mode.\n");
		return err;
	}

	IPW_DEBUG_WX("SET Power Management Mode -> 0x%02X\n",
		     priv->power_mode);
	
	return 0;
}

static int ipw_wx_get_power(struct net_device *dev, 
			        struct iw_request_info *info, 
			        union iwreq_data *wrqu, char *extra)
{
	struct ipw_priv *priv = ieee80211_priv(dev);

	if (!(priv->power_mode & IPW_POWER_ENABLED)) {
		wrqu->power.disabled = 1;
	} else {
		wrqu->power.disabled = 0;
	}

	IPW_DEBUG_WX("GET Power Management Mode -> %02X\n", priv->power_mode);
	
	return 0;
}

static int ipw_wx_set_powermode(struct net_device *dev, 
				    struct iw_request_info *info, 
				    union iwreq_data *wrqu, char *extra)
{
	struct ipw_priv *priv = ieee80211_priv(dev);
	int mode = *(int *)extra;
	int err;
	
	if ((mode < 1) || (mode > IPW_POWER_LIMIT)) {
		mode = IPW_POWER_AC;
		priv->power_mode = mode;
	} else {
		priv->power_mode = IPW_POWER_ENABLED | mode;
	}
	
	if (priv->power_mode != mode) {
		err = ipw_send_power_mode(priv, mode);
		
		if (err) {
			IPW_DEBUG_WX("failed setting power mode.\n");
			return err;
		}
	}
	
	return 0;
}

#define MAX_WX_STRING 80
static int ipw_wx_get_powermode(struct net_device *dev, 
				    struct iw_request_info *info, 
				    union iwreq_data *wrqu, char *extra)
{
	struct ipw_priv *priv = ieee80211_priv(dev);
	int level = IPW_POWER_LEVEL(priv->power_mode);
	char *p = extra;

	p += snprintf(p, MAX_WX_STRING, "Power save level: %d ", level);

	switch (level) {
	case IPW_POWER_AC:
		p += snprintf(p, MAX_WX_STRING - (p - extra), "(AC)");
		break;
	case IPW_POWER_BATTERY:
		p += snprintf(p, MAX_WX_STRING - (p - extra), "(BATTERY)");
		break;
	default:
		p += snprintf(p, MAX_WX_STRING - (p - extra),
			      "(Timeout %dms, Period %dms)", 
			      timeout_duration[level - 1] / 1000,
			      period_duration[level - 1] / 1000);
	}

	if (!(priv->power_mode & IPW_POWER_ENABLED))
		p += snprintf(p, MAX_WX_STRING - (p - extra)," OFF");

	wrqu->data.length = p - extra + 1;

	return 0;
}

static int ipw_wx_set_wireless_mode(struct net_device *dev,
                                    struct iw_request_info *info,
                                    union iwreq_data *wrqu, char *extra)
{
        struct ipw_priv *priv = ieee80211_priv(dev);
	int mode = *(int *)extra;
	u8 band = 0, modulation = 0;

	if (mode == 0 || mode & ~IEEE_MODE_MASK) {
		IPW_WARNING("Attempt to set invalid wireless mode: %d\n",
			    mode);
		return -EINVAL;
	}
		
	if (priv->adapter == IPW_2915ABG) {
		priv->ieee->abg_ture = 1;
		if (mode & IEEE_A) {
			band |= IEEE80211_52GHZ_BAND;
			modulation |= IEEE80211_OFDM_MODULATION;
		} else
			priv->ieee->abg_ture = 0;
	} else {
		if (mode & IEEE_A) {
			IPW_WARNING("Attempt to set 2200BG into "
				    "802.11a mode\n");
			return -EINVAL;
		}

		priv->ieee->abg_ture = 0;
	}

	if (mode & IEEE_B) {
		band |= IEEE80211_24GHZ_BAND;
		modulation |= IEEE80211_CCK_MODULATION;
	} else
		priv->ieee->abg_ture = 0;
	
	if (mode & IEEE_G) {
		band |= IEEE80211_24GHZ_BAND;
		modulation |= IEEE80211_OFDM_MODULATION;
	} else
		priv->ieee->abg_ture = 0;

	priv->ieee->mode = mode;
	priv->ieee->freq_band = band;
	priv->ieee->modulation = modulation;
      	init_supported_rates(priv, &priv->rates);

	/* If we are currently associated, or trying to associate
         * then see if this is a new configuration (causing us to 
	 * disassociate) */
        if (priv->status & (STATUS_ASSOCIATED | STATUS_ASSOCIATING)) {
		/* The resulting association will trigger 
		 * the new rates to be sent to the device */
                IPW_DEBUG_ASSOC("Disassociating due to mode change.\n");
                ipw_disassociate(priv);
	} else
		ipw_send_supported_rates(priv, &priv->rates);

	IPW_DEBUG_WX("PRIV SET MODE: %c%c%c\n", 
		     mode & IEEE_A ? 'a' : '.',
		     mode & IEEE_B ? 'b' : '.',
		     mode & IEEE_G ? 'g' : '.');
	return 0;
}

static int ipw_wx_get_wireless_mode(struct net_device *dev,
                                    struct iw_request_info *info,
                                    union iwreq_data *wrqu, char *extra)
{
        struct ipw_priv *priv = ieee80211_priv(dev);

	switch (priv->ieee->freq_band) {
	case IEEE80211_24GHZ_BAND:
		switch (priv->ieee->modulation) {
		case IEEE80211_CCK_MODULATION:
			strncpy(extra, "802.11b (2)", MAX_WX_STRING);
			break;
		case IEEE80211_OFDM_MODULATION: 
			strncpy(extra, "802.11g (4)", MAX_WX_STRING);
			break;
		default:
			strncpy(extra, "802.11bg (6)", MAX_WX_STRING);
			break;
		}
		break;

	case IEEE80211_52GHZ_BAND: 
		strncpy(extra, "802.11a (1)", MAX_WX_STRING);
		break;

	default: /* Mixed Band */
		switch (priv->ieee->modulation) {
		case IEEE80211_CCK_MODULATION:
			strncpy(extra, "802.11ab (3)", MAX_WX_STRING);
			break;
		case IEEE80211_OFDM_MODULATION: 
			strncpy(extra, "802.11ag (5)", MAX_WX_STRING);
			break;
		default:
			strncpy(extra, "802.11abg (7)", MAX_WX_STRING);
			break;
		}
		break;
	} 
	
	IPW_DEBUG_WX("PRIV GET MODE: %s\n", extra);

        wrqu->data.length = strlen(extra) + 1;

        return 0;
}

#ifdef CONFIG_IPW_PROMISC
static int ipw_wx_set_promisc(struct net_device *dev, 
			      struct iw_request_info *info, 
			      union iwreq_data *wrqu, char *extra)
{ 
	struct ipw_priv *priv = ieee80211_priv(dev);
	int *parms = (int *)extra;
	int enable = (parms[0] > 0);

	IPW_DEBUG_WX("SET PROMISC: %d %d\n", enable, parms[1]);
	if (enable) {
		if (priv->ieee->iw_mode != IW_MODE_MONITOR) {
			priv->net_dev->type = ARPHRD_IEEE80211;
			ipw_adapter_restart(priv);
		}
		
		ipw_set_channel(priv, parms[1]);
	} else {
		if (priv->ieee->iw_mode != IW_MODE_MONITOR)
			return 0;
		priv->net_dev->type = ARPHRD_ETHER;
		ipw_adapter_restart(priv);
	}
	return 0;
}


static int ipw_wx_reset(struct net_device *dev, 
			struct iw_request_info *info, 
			union iwreq_data *wrqu, char *extra)
{ 
	struct ipw_priv *priv = ieee80211_priv(dev);
	IPW_DEBUG_WX("RESET\n");
	ipw_adapter_restart(priv);
	return 0;
}
#endif // CONFIG_IPW_PROMISC

/* Rebase the WE IOCTLs to zero for the handler array */
#define IW_IOCTL(x) [(x)-SIOCSIWCOMMIT]
static iw_handler ipw_wx_handlers[] =
{
	IW_IOCTL(SIOCGIWNAME)   = ipw_wx_get_name,
	IW_IOCTL(SIOCSIWFREQ)   = ipw_wx_set_freq,
	IW_IOCTL(SIOCGIWFREQ)   = ipw_wx_get_freq,
	IW_IOCTL(SIOCSIWMODE)   = ipw_wx_set_mode,
	IW_IOCTL(SIOCGIWMODE)   = ipw_wx_get_mode,
	IW_IOCTL(SIOCGIWRANGE)  = ipw_wx_get_range,
	IW_IOCTL(SIOCSIWAP)     = ipw_wx_set_wap,
	IW_IOCTL(SIOCGIWAP)     = ipw_wx_get_wap,
	IW_IOCTL(SIOCSIWSCAN)   = ipw_wx_set_scan,
	IW_IOCTL(SIOCGIWSCAN)   = ipw_wx_get_scan,
	IW_IOCTL(SIOCSIWESSID)  = ipw_wx_set_essid,
	IW_IOCTL(SIOCGIWESSID)  = ipw_wx_get_essid,
	IW_IOCTL(SIOCSIWNICKN)  = ipw_wx_set_nick,
	IW_IOCTL(SIOCGIWNICKN)  = ipw_wx_get_nick,
	IW_IOCTL(SIOCSIWRATE)   = ipw_wx_set_rate,
	IW_IOCTL(SIOCGIWRATE)   = ipw_wx_get_rate,
	IW_IOCTL(SIOCSIWRTS)    = ipw_wx_set_rts,
	IW_IOCTL(SIOCGIWRTS)    = ipw_wx_get_rts,
	IW_IOCTL(SIOCSIWFRAG)   = ipw_wx_set_frag,
	IW_IOCTL(SIOCGIWFRAG)   = ipw_wx_get_frag,
	IW_IOCTL(SIOCSIWTXPOW)  = ipw_wx_set_txpow,
	IW_IOCTL(SIOCGIWTXPOW)  = ipw_wx_get_txpow,
	IW_IOCTL(SIOCSIWRETRY)  = ipw_wx_set_retry,
	IW_IOCTL(SIOCGIWRETRY)  = ipw_wx_get_retry,
	IW_IOCTL(SIOCSIWENCODE) = ipw_wx_set_encode,
	IW_IOCTL(SIOCGIWENCODE) = ipw_wx_get_encode,
	IW_IOCTL(SIOCSIWPOWER)  = ipw_wx_set_power,
	IW_IOCTL(SIOCGIWPOWER)  = ipw_wx_get_power,
};

#define IPW_PRIV_SET_POWER	SIOCIWFIRSTPRIV
#define IPW_PRIV_GET_POWER	SIOCIWFIRSTPRIV+1
#define IPW_PRIV_SET_MODE	SIOCIWFIRSTPRIV+2
#define IPW_PRIV_GET_MODE	SIOCIWFIRSTPRIV+3
#define IPW_PRIV_SET_PROMISC	SIOCIWFIRSTPRIV+4
#define IPW_PRIV_RESET		SIOCIWFIRSTPRIV+5


static struct iw_priv_args ipw_priv_args[] = { 
	{
		.cmd = IPW_PRIV_SET_POWER,
		.set_args = IW_PRIV_TYPE_INT | IW_PRIV_SIZE_FIXED | 1, 
		.name = "set_power"
	}, 
	{
		.cmd = IPW_PRIV_GET_POWER,
		.get_args = IW_PRIV_TYPE_CHAR | IW_PRIV_SIZE_FIXED | MAX_WX_STRING,
		.name = "get_power" 
	},
	{
		.cmd = IPW_PRIV_SET_MODE,
		.set_args = IW_PRIV_TYPE_INT | IW_PRIV_SIZE_FIXED | 1,
		.name = "set_mode" 
	},
	{
		.cmd = IPW_PRIV_GET_MODE,
		.get_args = IW_PRIV_TYPE_CHAR | IW_PRIV_SIZE_FIXED | MAX_WX_STRING,
		.name = "get_mode" 
	},
#ifdef CONFIG_IPW_PROMISC
	{
		IPW_PRIV_SET_PROMISC, 
		IW_PRIV_TYPE_INT | IW_PRIV_SIZE_FIXED | 2, 0, "monitor" 
	}, 
	{
		IPW_PRIV_RESET, 
		IW_PRIV_TYPE_INT | IW_PRIV_SIZE_FIXED | 0, 0, "reset" 
	},
#endif /* CONFIG_IPW_PROMISC */
};

static iw_handler ipw_priv_handler[] = {
	ipw_wx_set_powermode,
	ipw_wx_get_powermode,
	ipw_wx_set_wireless_mode,
	ipw_wx_get_wireless_mode,
#ifdef CONFIG_IPW_PROMISC
	ipw_wx_set_promisc,
	ipw_wx_reset, 
#endif
};

static struct iw_handler_def ipw_wx_handler_def = 
{
	.standard 	= ipw_wx_handlers,
	.num_standard	= ARRAY_SIZE(ipw_wx_handlers),
	.num_private	= ARRAY_SIZE(ipw_priv_handler),
 	.num_private_args = ARRAY_SIZE(ipw_priv_args),
	.private	= ipw_priv_handler, 
	.private_args	= ipw_priv_args,	
};




/*
 * Get wireless statistics.
 * Called by /proc/net/wireless
 * Also called by SIOCGIWSTATS
 */
static struct iw_statistics *ipw_get_wireless_stats(struct net_device * dev)
{
	struct ipw_priv *priv = ieee80211_priv(dev);
	struct iw_statistics *wstats;
	
	wstats = &priv->wstats;

	/* if hw is disabled, then ipw2100_get_ordinal() can't be called.
	 * ipw2100_wx_wireless_stats seems to be called before fw is 
	 * initialized.  STATUS_ASSOCIATED will only be set if the hw is up
	 * and associated; if not associcated, the values are all meaningless
	 * anyway, so set them all to NULL and INVALID */
	if (!(priv->status & STATUS_ASSOCIATED)) {
		wstats->miss.beacon = 0;
		wstats->discard.retries = 0;
		wstats->qual.qual = 0;
		wstats->qual.level = 0;
		wstats->qual.noise = 0;
		wstats->qual.updated = 7;
		wstats->qual.updated |= IW_QUAL_NOISE_INVALID |
			IW_QUAL_QUAL_INVALID | IW_QUAL_LEVEL_INVALID;
		return wstats;
	} 

	wstats->qual.qual = priv->quality;
	wstats->qual.level = average_value(&priv->average_rssi);
	wstats->qual.noise = average_value(&priv->average_noise);
	wstats->qual.updated = IW_QUAL_QUAL_UPDATED | IW_QUAL_LEVEL_UPDATED |
		IW_QUAL_NOISE_UPDATED;

	wstats->miss.beacon = average_value(&priv->average_missed_beacons);
	wstats->discard.retries = priv->last_tx_failures;
	wstats->discard.code = priv->ieee->ieee_stats.rx_discards_undecryptable;
	
/*	if (ipw_get_ordinal(priv, IPW_ORD_STAT_TX_RETRY, &tx_retry, &len))
	goto fail_get_ordinal;
	wstats->discard.retries += tx_retry; */
	
	return wstats;
}


/* net device stuff */

static inline void init_sys_config(struct ipw_sys_config *sys_config)
{
        memset(sys_config, 0, sizeof(struct ipw_sys_config));
	sys_config->bt_coexistence = 1; /* We may need to look into prvStaBtConfig */
	sys_config->answer_broadcast_ssid_probe = 0;
	sys_config->accept_all_data_frames = 0;
	sys_config->accept_non_directed_frames = 1;
	sys_config->exclude_unicast_unencrypted = 0;
	sys_config->disable_unicast_decryption = 1;
	sys_config->exclude_multicast_unencrypted = 0;
	sys_config->disable_multicast_decryption = 1;
	sys_config->antenna_diversity = CFG_SYS_ANTENNA_BOTH;
	sys_config->pass_crc_to_host = 0; /* TODO: See if 1 gives us FCS */
	sys_config->dot11g_auto_detection = 0;
	sys_config->enable_cts_to_self = 0; 
	sys_config->bt_coexist_collision_thr = 0;
	sys_config->pass_noise_stats_to_host = 1;
}

static int ipw_net_open(struct net_device *dev)
{
	struct ipw_priv *priv = ieee80211_priv(dev);
	IPW_DEBUG_INFO("dev->open\n");
	/* we should be verifying the device is ready to be opened */
	if (!(priv->status & STATUS_RF_KILL_MASK) && 
	    (priv->status & STATUS_ASSOCIATED)) 
		netif_start_queue(dev);
	return 0;
}

static int ipw_net_stop(struct net_device *dev)
{
	IPW_DEBUG_INFO("dev->close\n");
	netif_stop_queue(dev);
	return 0;
}

/*
todo:

modify to send one tfd per fragment instead of using chunking.  otherwise
we need to heavily modify the ieee80211_skb_to_txb.
*/

static inline void ipw_tx_skb(struct ipw_priv *priv, struct ieee80211_txb *txb)
{
	struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)
		txb->fragments[0]->data;
	int i = 0;
	struct tfd_frame *tfd;
	struct clx2_tx_queue *txq = &priv->txq[0];
	struct clx2_queue *q = &txq->q;
	u8 id, hdr_len, unicast;
	u16 remaining_bytes;

	switch (priv->ieee->iw_mode) {
	case IW_MODE_ADHOC:
		hdr_len = IEEE80211_3ADDR_LEN;
		unicast = !is_broadcast_ether_addr(hdr->addr1) &&
			!is_multicast_ether_addr(hdr->addr1);
		id = ipw_find_station(priv, hdr->addr1);
		if (id == IPW_INVALID_STATION) {
			id = ipw_add_station(priv, hdr->addr1);
			if (id == IPW_INVALID_STATION) {
				IPW_WARNING("Attempt to send data to "
					    "invalid cell: " MAC_FMT "\n", 
					    MAC_ARG(hdr->addr1));
				goto drop;
			}
		}
		break;

	case IW_MODE_INFRA:
	default:
		unicast = !is_broadcast_ether_addr(hdr->addr3) &&
			!is_multicast_ether_addr(hdr->addr3);
		hdr_len = IEEE80211_3ADDR_LEN;
		id = 0;
		break;
	}

	tfd = &txq->bd[q->first_empty];
	txq->txb[q->first_empty] = txb;
	memset(tfd, 0, sizeof(*tfd));
	tfd->u.data.station_number = id;

	tfd->control_flags.message_type = TX_FRAME_TYPE;
	tfd->control_flags.control_bits = TFD_NEED_IRQ_MASK;

	tfd->u.data.cmd_id = DINO_CMD_TX;
	tfd->u.data.len = txb->payload_size;
	remaining_bytes = txb->payload_size;
	if (unlikely(!unicast))
		tfd->u.data.tx_flags = DCT_FLAG_NO_WEP;
	else
		tfd->u.data.tx_flags = DCT_FLAG_NO_WEP | DCT_FLAG_ACK_REQD;
	
	if (priv->assoc_request.ieee_mode == IPW_B_MODE)
		tfd->u.data.tx_flags_ext = DCT_FLAG_EXT_MODE_CCK;
	else
		tfd->u.data.tx_flags_ext = DCT_FLAG_EXT_MODE_OFDM;

	if (priv->config & CFG_PREAMBLE)
		tfd->u.data.tx_flags |= DCT_FLAG_SHORT_PREMBL;

	memcpy(&tfd->u.data.tfd.tfd_24.mchdr, hdr, hdr_len);

	/* payload */
	tfd->u.data.num_chunks = min((u8)(NUM_TFD_CHUNKS - 2), txb->nr_frags);
	for (i = 0; i < tfd->u.data.num_chunks; i++) {
		IPW_DEBUG_TX("Dumping TX packet frag %i of %i (%d bytes):\n", 
			     i, tfd->u.data.num_chunks,
			     txb->fragments[i]->len - hdr_len);
		printk_buf(IPW_DL_TX, txb->fragments[i]->data + hdr_len, 
			   txb->fragments[i]->len - hdr_len);

		tfd->u.data.chunk_ptr[i] = pci_map_single(
			priv->pci_dev, txb->fragments[i]->data + hdr_len,
			txb->fragments[i]->len - hdr_len, PCI_DMA_TODEVICE);
		tfd->u.data.chunk_len[i] = txb->fragments[i]->len - hdr_len;
	}

	if (i != txb->nr_frags) {
		struct sk_buff *skb;
		u16 remaining_bytes = 0;
		int j;

		for (j = i; j < txb->nr_frags; j++)
			remaining_bytes += txb->fragments[j]->len - hdr_len;

		printk(KERN_INFO "Trying to reallocate for %d bytes\n",
		       remaining_bytes);
		skb = alloc_skb(remaining_bytes, GFP_ATOMIC);
		if (skb != NULL) {
			tfd->u.data.chunk_len[i] = remaining_bytes;
			for (j = i; j < txb->nr_frags; j++) {
				int size = txb->fragments[j]->len - hdr_len;
				printk(KERN_INFO "Adding frag %d %d...\n",
					j, size);
				memcpy(skb_put(skb, size),
					txb->fragments[j]->data + hdr_len,
					size);
			}
			dev_kfree_skb_any(txb->fragments[i]);
			txb->fragments[i] = skb;
			tfd->u.data.chunk_ptr[i] = pci_map_single(
				priv->pci_dev, skb->data,
				tfd->u.data.chunk_len[i], PCI_DMA_TODEVICE);
			tfd->u.data.num_chunks++;
		} 
	}

	/* kick DMA */
	q->first_empty = ipw_queue_inc_wrap(q->first_empty, q->n_bd);
	ipw_write32(priv, q->reg_w, q->first_empty);

	if (ipw_queue_space(q) < q->high_mark) 
		netif_stop_queue(priv->net_dev);

	return;

 drop:
	IPW_DEBUG_DROP("Silently dropping Tx packet.\n");
	ieee80211_txb_free(txb);
}

static int ipw_net_hard_start_xmit(struct ieee80211_txb *txb,
				   struct net_device *dev)
{
	struct ipw_priv *priv = ieee80211_priv(dev);
	unsigned long flags;

	IPW_DEBUG_TX("dev->xmit(%d bytes)\n", txb->payload_size);

	spin_lock_irqsave(&priv->lock, flags);

	if (!(priv->status & STATUS_ASSOCIATED)) {
		IPW_DEBUG_INFO("Tx attempt while not associated.\n");
		priv->ieee->stats.tx_carrier_errors++;
		netif_stop_queue(dev);
		goto fail_unlock;
	}

	ipw_tx_skb(priv, txb);

	spin_unlock_irqrestore(&priv->lock, flags);
	return 0;

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

static struct net_device_stats *ipw_net_get_stats(struct net_device *dev)
{
	struct ipw_priv *priv = ieee80211_priv(dev);
	
	priv->ieee->stats.tx_packets = priv->tx_packets;
	priv->ieee->stats.rx_packets = priv->rx_packets;
	return &priv->ieee->stats;
}

static void ipw_net_set_multicast_list(struct net_device *dev)
{

}

static int ipw_net_set_mac_address(struct net_device *dev, void *p)
{
	struct ipw_priv *priv = ieee80211_priv(dev);
	struct sockaddr *addr = p;
	if (!is_valid_ether_addr(addr->sa_data))
		return -EADDRNOTAVAIL;
	priv->config |= CFG_CUSTOM_MAC;
	memcpy(priv->mac_addr, addr->sa_data, ETH_ALEN);
	printk(KERN_INFO "%s: Setting MAC to " MAC_FMT "\n",
	       priv->net_dev->name, MAC_ARG(priv->mac_addr));
	ipw_adapter_restart(priv);
	return 0;
}

static void ipw_ethtool_get_drvinfo(struct net_device *dev, 
				    struct ethtool_drvinfo *info)
{
	struct ipw_priv *p = ieee80211_priv(dev);
	char vers[64];
	char date[32];
	u32 len;

	strcpy(info->driver, DRV_NAME);
	strcpy(info->version, DRV_VERSION);

	len = sizeof(vers);
	ipw_get_ordinal(p, IPW_ORD_STAT_FW_VERSION, vers, &len);
	len = sizeof(date);
	ipw_get_ordinal(p, IPW_ORD_STAT_FW_DATE, date, &len);

	snprintf(info->fw_version, sizeof(info->fw_version),"%s (%s)", 
		 vers, date);
	strcpy(info->bus_info, pci_name(p->pci_dev));
	info->eedump_len = CX2_EEPROM_IMAGE_SIZE;
}

static u32 ipw_ethtool_get_link(struct net_device *dev)
{
	struct ipw_priv *priv = ieee80211_priv(dev);
	return (priv->status & STATUS_ASSOCIATED) != 0;
}

static int ipw_ethtool_get_eeprom_len(struct net_device *dev)
{
	return CX2_EEPROM_IMAGE_SIZE;
}

static int ipw_ethtool_get_eeprom(struct net_device *dev,
				  struct ethtool_eeprom *eeprom, u8 *bytes)
{
	struct ipw_priv *p = ieee80211_priv(dev);

	if (eeprom->offset + eeprom->len > CX2_EEPROM_IMAGE_SIZE)
		return -EINVAL;
	
	memcpy(bytes, &((u8 *)p->eeprom)[eeprom->offset], eeprom->len);
	return 0;
}

static int ipw_ethtool_set_eeprom(struct net_device *dev,
				  struct ethtool_eeprom *eeprom, u8 *bytes)
{
	struct ipw_priv *p = ieee80211_priv(dev);
	int i;

	if (eeprom->offset + eeprom->len > CX2_EEPROM_IMAGE_SIZE)
		return -EINVAL;

	memcpy(&((u8 *)p->eeprom)[eeprom->offset], bytes, eeprom->len);
	for (i = IPW_EEPROM_DATA; 
	     i < IPW_EEPROM_DATA + CX2_EEPROM_IMAGE_SIZE; 
	     i++)
		ipw_write8(p, i, p->eeprom[i]);

	return 0;
}

static struct ethtool_ops ipw_ethtool_ops = {
	 .get_link       = ipw_ethtool_get_link,
	 .get_drvinfo	 = ipw_ethtool_get_drvinfo,
	 .get_eeprom_len = ipw_ethtool_get_eeprom_len,
	 .get_eeprom	 = ipw_ethtool_get_eeprom,
	 .set_eeprom	 = ipw_ethtool_set_eeprom,
};

static irqreturn_t ipw_isr(int irq, void *data, struct pt_regs *regs)
{
	struct ipw_priv *priv = data;
	u32 inta, inta_mask;
	
	if (!priv)
		return IRQ_NONE;

	spin_lock(&priv->lock);

	if (!(priv->status & STATUS_INT_ENABLED)) {
		/* Shared IRQ */
		goto none;
	}

	inta = ipw_read32(priv, CX2_INTA_RW);
	inta_mask = ipw_read32(priv, CX2_INTA_MASK_R);
	
	if (inta == 0xFFFFFFFF) {
		/* Hardware disappeared */
		IPW_WARNING("IRQ INTA == 0xFFFFFFFF\n");
		goto none;
	}

	if (!(inta & (CX2_INTA_MASK_ALL & inta_mask))) {
		/* Shared interrupt */
		goto none;
	}

	/* tell the device to stop sending interrupts */
	ipw_disable_interrupts(priv);
	    
	/* ack current interrupts */
	inta &= (CX2_INTA_MASK_ALL & inta_mask);
	ipw_write32(priv, CX2_INTA_RW, inta);
	    
	/* Cache INTA value for our tasklet */
	priv->isr_inta = inta;

	tasklet_schedule(&priv->irq_tasklet);

 	spin_unlock(&priv->lock);

	return IRQ_HANDLED;
 none:
	spin_unlock(&priv->lock);
	return IRQ_NONE;
}

static void ipw_rf_kill(void *adapter)
{
	struct ipw_priv *priv = adapter;
	unsigned long flags;
	
	spin_lock_irqsave(&priv->lock, flags);

	if (rf_kill_active(priv)) {
		IPW_DEBUG_RF_KILL("RF Kill active, rescheduling GPIO check\n");
		if (priv->workqueue)
			queue_delayed_work(priv->workqueue,
					   &priv->rf_kill, 2 * HZ);
		goto exit_unlock;
	}

	/* RF Kill is now disabled, so bring the device back up */

	if (!(priv->status & STATUS_RF_KILL_MASK)) {
		IPW_DEBUG_RF_KILL("HW RF Kill no longer active, restarting "
				  "device\n");

		/* we can not do an adapter restart while inside an irq lock */
		queue_work(priv->workqueue, &priv->adapter_restart);
	} else 
		IPW_DEBUG_RF_KILL("HW RF Kill deactivated.  SW RF Kill still "
				  "enabled\n");

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

static int ipw_setup_deferred_work(struct ipw_priv *priv)
{
	int ret = 0;

#ifdef CONFIG_SOFTWARE_SUSPEND2
	priv->workqueue = create_workqueue(DRV_NAME, 0);
#else
	priv->workqueue = create_workqueue(DRV_NAME);
#endif	
	init_waitqueue_head(&priv->wait_command_queue);

	INIT_WORK(&priv->adhoc_check, ipw_adhoc_check, priv);
	INIT_WORK(&priv->associate, ipw_associate, priv);
	INIT_WORK(&priv->disassociate, ipw_disassociate, priv);
	INIT_WORK(&priv->rx_replenish, ipw_rx_queue_replenish, priv);
	INIT_WORK(&priv->adapter_restart, ipw_adapter_restart, priv);
	INIT_WORK(&priv->rf_kill, ipw_rf_kill, priv);
	INIT_WORK(&priv->up, (void (*)(void *))ipw_up, priv);
	INIT_WORK(&priv->down, (void (*)(void *))ipw_down, priv);
	INIT_WORK(&priv->request_scan, 
		  (void (*)(void *))ipw_request_scan, priv);
	INIT_WORK(&priv->gather_stats, 
		  (void (*)(void *))ipw_gather_stats, priv);
	INIT_WORK(&priv->abort_scan, (void (*)(void *))ipw_abort_scan, priv);
	INIT_WORK(&priv->roam, ipw_roam, priv);
	INIT_WORK(&priv->scan_check, ipw_scan_check, priv);

	tasklet_init(&priv->irq_tasklet, (void (*)(unsigned long))
		     ipw_irq_tasklet, (unsigned long)priv);

	return ret;
}


static void shim__set_security(struct net_device *dev,
			       struct ieee80211_security *sec)
{
	struct ipw_priv *priv = ieee80211_priv(dev);
	int i;

	for (i = 0; i < 4; i++) { 
		if (sec->flags & (1 << i)) {
			priv->sec.key_sizes[i] = sec->key_sizes[i];
			if (sec->key_sizes[i] == 0)
				priv->sec.flags &= ~(1 << i);
			else
				memcpy(priv->sec.keys[i], sec->keys[i], 
				       sec->key_sizes[i]);
			priv->sec.flags |= (1 << i);
			priv->status |= STATUS_SECURITY_UPDATED;
		} 
	}

	if ((sec->flags & SEC_ACTIVE_KEY) &&
	    priv->sec.active_key != sec->active_key) {
		if (sec->active_key <= 3) {
			priv->sec.active_key = sec->active_key;
			priv->sec.flags |= SEC_ACTIVE_KEY;
		} else 
			priv->sec.flags &= ~SEC_ACTIVE_KEY;
		priv->status |= STATUS_SECURITY_UPDATED;
	}

	if ((sec->flags & SEC_AUTH_MODE) &&
	    (priv->sec.auth_mode != sec->auth_mode)) {
		priv->sec.auth_mode = sec->auth_mode;
		priv->sec.flags |= SEC_AUTH_MODE;
		if (sec->auth_mode == WLAN_AUTH_SHARED_KEY)
			priv->capability |= CAP_SHARED_KEY;
		else
			priv->capability &= ~CAP_SHARED_KEY;
		priv->status |= STATUS_SECURITY_UPDATED;
	}
	
	if (sec->flags & SEC_ENABLED &&
	    priv->sec.enabled != sec->enabled) {
		priv->sec.flags |= SEC_ENABLED;
		priv->sec.enabled = sec->enabled;
		priv->status |= STATUS_SECURITY_UPDATED;
		if (sec->enabled) 
			priv->capability |= CAP_PRIVACY_ON;
		else
			priv->capability &= ~CAP_PRIVACY_ON;
	}
	
	if (sec->flags & SEC_LEVEL &&
	    priv->sec.level != sec->level) {
		priv->sec.level = sec->level;
		priv->sec.flags |= SEC_LEVEL;
		priv->status |= STATUS_SECURITY_UPDATED;
	}

	/* To match current functionality of ipw2100 (which works well w/ 
	 * various supplicants, we don't force a disassociate if the 
	 * privacy capability changes ... */
#if 0
	if ((priv->status & (STATUS_ASSOCIATED | STATUS_ASSOCIATING)) &&
	    (((priv->assoc_request.capability & 
	       WLAN_CAPABILITY_PRIVACY) && !sec->enabled) ||
	     (!(priv->assoc_request.capability & 
		 WLAN_CAPABILITY_PRIVACY) && sec->enabled))) {
		IPW_DEBUG_ASSOC("Disassociating due to capability "
				"change.\n");
		ipw_disassociate(priv);
	}
#endif
}

static int init_supported_rates(struct ipw_priv *priv, 
				struct ipw_supported_rates *rates)
{
	/* TODO: Mask out rates based on priv->rates_mask */

	memset(rates, 0, sizeof(*rates));
        /* configure supported rates */
	switch (priv->ieee->freq_band) {
	case IEEE80211_52GHZ_BAND:
		rates->ieee_mode = IPW_A_MODE;
		rates->purpose = IPW_RATE_CAPABILITIES;
		ipw_add_ofdm_scan_rates(rates, IEEE80211_CCK_MODULATION,
					IEEE80211_OFDM_DEFAULT_RATES_MASK);
		break;

	default: /* Mixed or 2.4Ghz */
		rates->ieee_mode = IPW_G_MODE;
		rates->purpose = IPW_RATE_CAPABILITIES;
		ipw_add_cck_scan_rates(rates, IEEE80211_CCK_MODULATION,
				       IEEE80211_CCK_DEFAULT_RATES_MASK);
		if (priv->ieee->modulation & IEEE80211_OFDM_MODULATION) {
			ipw_add_ofdm_scan_rates(rates, IEEE80211_CCK_MODULATION,
						IEEE80211_OFDM_DEFAULT_RATES_MASK);
		}
		break;
	}

	return 0;
}

static int ipw_config(struct ipw_priv *priv) 
{
	int i;
	struct ipw_tx_power tx_power;

	memset(&priv->sys_config, 0, sizeof(priv->sys_config));
	memset(&tx_power, 0, sizeof(tx_power));

	/* This is only called from ipw_up, which resets/reloads the firmware
	   so, we don't need to first disable the card before we configure
	   it */

	/* configure device for 'G' band */
	tx_power.ieee_mode = IPW_G_MODE;
	tx_power.num_channels = 11;
	for (i = 0; i < 11; i++) {
		tx_power.channels_tx_power[i].channel_number = i + 1;
		tx_power.channels_tx_power[i].tx_power = priv->tx_power;
	}
	if (ipw_send_tx_power(priv, &tx_power))
		goto error;

	/* configure device to also handle 'B' band */
	tx_power.ieee_mode = IPW_B_MODE;
	if (ipw_send_tx_power(priv, &tx_power))
		goto error;

	/* initialize adapter address */
	if (ipw_send_adapter_address(priv, priv->net_dev->dev_addr))
		goto error;

	/* set basic system config settings */
	init_sys_config(&priv->sys_config);
	if (ipw_send_system_config(priv, &priv->sys_config))
		goto error;

        init_supported_rates(priv, &priv->rates);
        if (ipw_send_supported_rates(priv, &priv->rates))
		goto error;

	/* Set request-to-send threshold */
	if (priv->rts_threshold) {
		if (ipw_send_rts_threshold(priv, priv->rts_threshold))
			goto error;
	}

	if (ipw_set_random_seed(priv))
		goto error;
	
	/* final state transition to the RUN state */
	if (ipw_send_host_complete(priv))
		goto error;

	/* If configured to try and auto-associate, kick off a scan */
	if ((priv->config & CFG_ASSOCIATE) && ipw_request_scan(priv))
		goto error;

	return 0;
	
 error:
	return -EIO;
}

#define MAX_HW_RESTARTS 5
static int ipw_up(struct ipw_priv *priv)
{
	int rc, i;

	if (priv->status & STATUS_EXIT_PENDING)
		return -EIO;

	for (i = 0; i < MAX_HW_RESTARTS; i++ ) {
		/* Load the microcode, firmware, and eeprom.  
		 * Also start the clocks. */
		rc = ipw_load(priv);
		if (rc) {
			IPW_ERROR("Unable to load firmware: 0x%08X\n",
					rc);
			return rc;
		}

		ipw_init_ordinals(priv);
		if (!(priv->config & CFG_CUSTOM_MAC))
			eeprom_parse_mac(priv, priv->mac_addr);
		memcpy(priv->net_dev->dev_addr, priv->mac_addr, ETH_ALEN);

		if (priv->status & STATUS_RF_KILL_MASK)
			return 0;

		rc = ipw_config(priv);
		if (!rc) {
			IPW_DEBUG_INFO("Configured device on count %i\n", i);
			priv->notif_missed_beacons = 0;
			netif_start_queue(priv->net_dev);
			return 0;
		} else {
			IPW_DEBUG_INFO("Device configuration failed: 0x%08X\n",
				       rc);
		}
		
		IPW_DEBUG_INFO("Failed to config device on retry %d of %d\n",
			       i, MAX_HW_RESTARTS);

		/* We had an error bringing up the hardware, so take it
		 * all the way back down so we can try again */
		ipw_down(priv);
	}

	/* tried to restart and config the device for as long as our 
	 * patience could withstand */
	IPW_ERROR("Unable to initialize device after %d attempts.\n",
		  i);
	return -EIO;
}

static void ipw_down(struct ipw_priv *priv)
{
	/* Attempt to disable the card */
#if 0
	ipw_send_card_disable(priv, 0);
#endif

	/* tell the device to stop sending interrupts */
	ipw_disable_interrupts(priv);

	/* Clear all bits but the RF Kill */
	priv->status &= STATUS_RF_KILL_MASK;

	netif_carrier_off(priv->net_dev);
	netif_stop_queue(priv->net_dev);

	ipw_stop_nic(priv);
}

/* Called by register_netdev() */
static int ipw_net_init(struct net_device *dev)
{
	struct ipw_priv *priv = ieee80211_priv(dev);

	if (priv->status & STATUS_RF_KILL_SW) {
		IPW_WARNING("Radio disabled by module parameter.\n");
		return 0;
	} else if (rf_kill_active(priv)) {
		IPW_WARNING("Radio Frequency Kill Switch is On:\n"
			    "Kill switch must be turned off for "
			    "wireless networking to work.\n");
		queue_delayed_work(priv->workqueue, &priv->rf_kill, 2 * HZ);
		return 0;
	}

	if (ipw_up(priv))
		return -EIO;

	return 0;
}

/* PCI driver stuff */
static struct pci_device_id card_ids[] = {
	{PCI_VENDOR_ID_INTEL, 0x1043, 0x8086, 0x2701, 0, 0, 0},
	{PCI_VENDOR_ID_INTEL, 0x1043, 0x8086, 0x2702, 0, 0, 0},
	{PCI_VENDOR_ID_INTEL, 0x1043, 0x8086, 0x2711, 0, 0, 0},
	{PCI_VENDOR_ID_INTEL, 0x1043, 0x8086, 0x2712, 0, 0, 0},
	{PCI_VENDOR_ID_INTEL, 0x1043, 0x8086, 0x2721, 0, 0, 0},
	{PCI_VENDOR_ID_INTEL, 0x1043, 0x8086, 0x2722, 0, 0, 0},
	{PCI_VENDOR_ID_INTEL, 0x1043, 0x8086, 0x2731, 0, 0, 0},
	{PCI_VENDOR_ID_INTEL, 0x1043, 0x8086, 0x2732, 0, 0, 0},
	{PCI_VENDOR_ID_INTEL, 0x1043, 0x8086, 0x2741, 0, 0, 0},
	{PCI_VENDOR_ID_INTEL, 0x1043, 0x103c, 0x2741, 0, 0, 0},
	{PCI_VENDOR_ID_INTEL, 0x1043, 0x8086, 0x2742, 0, 0, 0},
	{PCI_VENDOR_ID_INTEL, 0x1043, 0x8086, 0x2751, 0, 0, 0},
	{PCI_VENDOR_ID_INTEL, 0x1043, 0x8086, 0x2752, 0, 0, 0},
	{PCI_VENDOR_ID_INTEL, 0x1043, 0x8086, 0x2753, 0, 0, 0},
	{PCI_VENDOR_ID_INTEL, 0x1043, 0x8086, 0x2754, 0, 0, 0},
	{PCI_VENDOR_ID_INTEL, 0x1043, 0x8086, 0x2761, 0, 0, 0},
	{PCI_VENDOR_ID_INTEL, 0x1043, 0x8086, 0x2762, 0, 0, 0},
	{PCI_VENDOR_ID_INTEL, 0x104f, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
	{PCI_VENDOR_ID_INTEL, 0x4220, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0}, /* BG */
	{PCI_VENDOR_ID_INTEL, 0x4221, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0}, /* 2225BG */
	{PCI_VENDOR_ID_INTEL, 0x4223, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0}, /* ABG */
	{PCI_VENDOR_ID_INTEL, 0x4224, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0}, /* ABG */
	
	/* required last entry */
	{0,}
};

MODULE_DEVICE_TABLE(pci, card_ids);

static struct attribute *ipw_sysfs_entries[] = {
	&dev_attr_rf_kill.attr,
	&dev_attr_direct_dword.attr,
	&dev_attr_indirect_byte.attr,
	&dev_attr_indirect_dword.attr,
	&dev_attr_mem_gpio_reg.attr,
	&dev_attr_command_event_reg.attr,
	&dev_attr_nic_type.attr,
	&dev_attr_status.attr,
	&dev_attr_cfg.attr,
	&dev_attr_dump_errors.attr,
	&dev_attr_dump_events.attr,
	&dev_attr_eeprom_delay.attr,
	&dev_attr_ucode_version.attr,
	&dev_attr_rtc.attr,
	NULL
};

static struct attribute_group ipw_attribute_group = {
	.name = NULL,		/* put in device directory */
	.attrs	= ipw_sysfs_entries,
};

static int ipw_pci_probe(struct pci_dev *pdev,
			 const struct pci_device_id *ent)
{
	int err = 0;
	struct net_device *net_dev;
	void __iomem *base;
	u32 length, val;
	struct ipw_priv *priv;
	int band, modulation;

	net_dev = alloc_ieee80211(sizeof(struct ipw_priv));
	if (net_dev == NULL) {
		err = -ENOMEM;
		goto out;
	}

	priv = ieee80211_priv(net_dev);
	priv->ieee = netdev_priv(net_dev);
	priv->net_dev = net_dev;
	priv->pci_dev = pdev;
#ifdef CONFIG_IPW_DEBUG
	ipw_debug_level = debug;
#endif
	spin_lock_init(&priv->lock);

	if (pci_enable_device(pdev)) {
		err = -ENODEV;
		goto out_free_ieee80211;
	}

	pci_set_master(pdev);

6996
	err = pci_set_dma_mask(pdev, DMA_32BIT_MASK);
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	if (!err) 
6998
		err = pci_set_consistent_dma_mask(pdev, DMA_32BIT_MASK);
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	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;

	/* We disable the RETRY_TIMEOUT register (0x41) to keep 
	 * PCI Tx retries from interfering with C3 CPU state */
	pci_read_config_dword(pdev, 0x40, &val); 
	if ((val & 0x0000ff00) != 0) 
		pci_write_config_dword(pdev, 0x40, val & 0xffff00ff);
	
	length = pci_resource_len(pdev, 0);
	priv->hw_len = length;
	
	base = ioremap_nocache(pci_resource_start(pdev, 0), length);
	if (!base) {
		err = -ENODEV;
		goto out_pci_release_regions;
	}

	priv->hw_base = base;
	IPW_DEBUG_INFO("pci_resource_len = 0x%08x\n", length);
	IPW_DEBUG_INFO("pci_resource_base = %p\n", base);

	err = ipw_setup_deferred_work(priv);
	if (err) {
		IPW_ERROR("Unable to setup deferred work\n");
		goto out_iounmap;
	}

	/* Initialize module parameter values here */
	if (ifname)
		strncpy(net_dev->name, ifname, IFNAMSIZ);

	if (associate) 
		priv->config |= CFG_ASSOCIATE;
	else
		IPW_DEBUG_INFO("Auto associate disabled.\n");
	
	if (auto_create) 
		priv->config |= CFG_ADHOC_CREATE;
	else
		IPW_DEBUG_INFO("Auto adhoc creation disabled.\n");
	
	if (disable) {
		priv->status |= STATUS_RF_KILL_SW;
		IPW_DEBUG_INFO("Radio disabled.\n");
	}

	if (channel != 0) {
		priv->config |= CFG_STATIC_CHANNEL;
		priv->channel = channel;
		IPW_DEBUG_INFO("Bind to static channel %d\n", channel);
 		IPW_DEBUG_INFO("Bind to static channel %d\n", channel);
		/* TODO: Validate that provided channel is in range */
	}

	switch (mode) {
	case 1:
		priv->ieee->iw_mode = IW_MODE_ADHOC;
		break;
#ifdef CONFIG_IPW_PROMISC	
	case 2:
		priv->ieee->iw_mode = IW_MODE_MONITOR;
		break;
#endif
	default:
	case 0:
		priv->ieee->iw_mode = IW_MODE_INFRA;
		break;
	}

	if ((priv->pci_dev->device == 0x4223) ||
	    (priv->pci_dev->device == 0x4224)) {
		printk(KERN_INFO DRV_NAME 
		       ": Detected Intel PRO/Wireless 2915ABG Network "
		       "Connection\n");
		priv->ieee->abg_ture = 1;
		band = IEEE80211_52GHZ_BAND | IEEE80211_24GHZ_BAND;
		modulation = IEEE80211_OFDM_MODULATION |
			IEEE80211_CCK_MODULATION;
		priv->adapter = IPW_2915ABG;
		priv->ieee->mode = IEEE_A|IEEE_G|IEEE_B;
	} else {
		if (priv->pci_dev->device == 0x4221) 
			printk(KERN_INFO DRV_NAME 
			       ": Detected Intel PRO/Wireless 2225BG Network "
			       "Connection\n");
		else
			printk(KERN_INFO DRV_NAME 
			       ": Detected Intel PRO/Wireless 2200BG Network "
			       "Connection\n");
		
		priv->ieee->abg_ture = 0;
		band = IEEE80211_24GHZ_BAND;
		modulation = IEEE80211_OFDM_MODULATION |
			IEEE80211_CCK_MODULATION;
		priv->adapter = IPW_2200BG;
		priv->ieee->mode = IEEE_G|IEEE_B;
	}

	priv->ieee->freq_band = band;
	priv->ieee->modulation = modulation;

	priv->rates_mask = IEEE80211_DEFAULT_RATES_MASK;

	priv->missed_beacon_threshold = IPW_MB_DISASSOCIATE_THRESHOLD_DEFAULT;
	priv->roaming_threshold = IPW_MB_ROAMING_THRESHOLD_DEFAULT;

	priv->rts_threshold = DEFAULT_RTS_THRESHOLD;

	/* If power management is turned on, default to AC mode */
        priv->power_mode = IPW_POWER_AC;
	priv->tx_power = IPW_DEFAULT_TX_POWER;

	err = request_irq(pdev->irq, ipw_isr, SA_SHIRQ, DRV_NAME, 
			  priv);
	if (err) {
		IPW_ERROR("Error allocating IRQ %d\n", pdev->irq);
		goto out_destroy_workqueue;
	}

	SET_MODULE_OWNER(net_dev);
	SET_NETDEV_DEV(net_dev, &pdev->dev);

	priv->ieee->hard_start_xmit = ipw_net_hard_start_xmit;
	priv->ieee->set_security = shim__set_security;

	net_dev->open = ipw_net_open;
	net_dev->stop = ipw_net_stop;
	net_dev->init = ipw_net_init;
	net_dev->get_stats = ipw_net_get_stats;
	net_dev->set_multicast_list = ipw_net_set_multicast_list;
	net_dev->set_mac_address = ipw_net_set_mac_address;
	net_dev->get_wireless_stats = ipw_get_wireless_stats;
	net_dev->wireless_handlers = &ipw_wx_handler_def;
	net_dev->ethtool_ops = &ipw_ethtool_ops;
	net_dev->irq = pdev->irq;
	net_dev->base_addr = (unsigned long )priv->hw_base;
	net_dev->mem_start = pci_resource_start(pdev, 0);
	net_dev->mem_end = net_dev->mem_start + pci_resource_len(pdev, 0) - 1;

	err = sysfs_create_group(&pdev->dev.kobj, &ipw_attribute_group);
	if (err) {
		IPW_ERROR("failed to create sysfs device attributes\n");
		goto out_release_irq;
	}

	err = register_netdev(net_dev);
	if (err) {
		IPW_ERROR("failed to register network device\n");
		goto out_remove_group;
	}

	return 0;

 out_remove_group:
	sysfs_remove_group(&pdev->dev.kobj, &ipw_attribute_group);
 out_release_irq:
	free_irq(pdev->irq, priv);
 out_destroy_workqueue:
	destroy_workqueue(priv->workqueue);
	priv->workqueue = NULL;
 out_iounmap:
	iounmap(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_free_ieee80211:
	free_ieee80211(priv->net_dev);
 out:
	return err;
}

static void ipw_pci_remove(struct pci_dev *pdev)
{
	struct ipw_priv *priv = pci_get_drvdata(pdev);
	if (!priv)
		return;

	priv->status |= STATUS_EXIT_PENDING;

	sysfs_remove_group(&pdev->dev.kobj, &ipw_attribute_group);

	ipw_down(priv);

	unregister_netdev(priv->net_dev);

	if (priv->rxq) {
		ipw_rx_queue_free(priv, priv->rxq);
		priv->rxq = NULL;
	}
	ipw_tx_queue_free(priv);

	/* ipw_down will ensure that there is no more pending work
	 * in the workqueue's, so we can safely remove them now. */
	if (priv->workqueue) { 
		cancel_delayed_work(&priv->adhoc_check);
		cancel_delayed_work(&priv->gather_stats);
		cancel_delayed_work(&priv->request_scan);
		cancel_delayed_work(&priv->rf_kill);
		cancel_delayed_work(&priv->scan_check);
		destroy_workqueue(priv->workqueue);
		priv->workqueue = NULL;
	}

	free_irq(pdev->irq, priv);
	iounmap(priv->hw_base);
	pci_release_regions(pdev);
	pci_disable_device(pdev);
	pci_set_drvdata(pdev, NULL);
	free_ieee80211(priv->net_dev);

#ifdef CONFIG_PM
	if (fw_loaded) {
		release_firmware(bootfw);
		release_firmware(ucode);
		release_firmware(firmware);
		fw_loaded = 0;
	}
#endif
}


#ifdef CONFIG_PM
static int ipw_pci_suspend(struct pci_dev *pdev, u32 state)
{
	struct ipw_priv *priv = pci_get_drvdata(pdev);
	struct net_device *dev = priv->net_dev;

	printk(KERN_INFO "%s: Going into suspend...\n", dev->name);

 	/* Take down the device; powers it off, etc. */
	ipw_down(priv);

	/* Remove the PRESENT state of the device */
	netif_device_detach(dev);

#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,10)
	pci_save_state(pdev, priv->pm_state);
#else
	pci_save_state(pdev);
#endif
	pci_disable_device(pdev);
	pci_set_power_state(pdev, state);
	
	return 0;
}

static int ipw_pci_resume(struct pci_dev *pdev)
{
	struct ipw_priv *priv = pci_get_drvdata(pdev);
	struct net_device *dev = priv->net_dev;
	u32 val;
	
	printk(KERN_INFO "%s: Coming out of suspend...\n", dev->name);

	pci_set_power_state(pdev, 0);
	pci_enable_device(pdev);
#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,10)
	pci_restore_state(pdev, priv->pm_state);
#else
	pci_restore_state(pdev);
#endif
	/*
	 * Suspend/Resume resets the PCI configuration space, so we have to
	 * re-disable the RETRY_TIMEOUT register (0x41) to keep PCI Tx retries
	 * from interfering with C3 CPU state. pci_restore_state won't help
	 * here since it only restores the first 64 bytes pci config header.
	 */
	pci_read_config_dword(pdev, 0x40, &val); 
	if ((val & 0x0000ff00) != 0) 
		pci_write_config_dword(pdev, 0x40, val & 0xffff00ff);

	/* Set the device back into the PRESENT state; this will also wake
	 * the queue of needed */
	netif_device_attach(dev);

	/* Bring the device back up */
	queue_work(priv->workqueue, &priv->up);
	
	return 0;
}
#endif

/* driver initialization stuff */
static struct pci_driver ipw_driver = {
	.name = DRV_NAME,
	.id_table = card_ids,
	.probe = ipw_pci_probe,
	.remove = __devexit_p(ipw_pci_remove),
#ifdef CONFIG_PM
	.suspend = ipw_pci_suspend,
	.resume = ipw_pci_resume,
#endif
};

static int __init ipw_init(void)
{
	int ret;

	printk(KERN_INFO DRV_NAME ": " DRV_DESCRIPTION ", " DRV_VERSION "\n");
	printk(KERN_INFO DRV_NAME ": " DRV_COPYRIGHT "\n");

	ret = pci_module_init(&ipw_driver);
	if (ret) {
		IPW_ERROR("Unable to initialize PCI module\n");
		return ret;
	}

	ret = driver_create_file(&ipw_driver.driver, 
				 &driver_attr_debug_level);
	if (ret) {
		IPW_ERROR("Unable to create driver sysfs file\n");
		pci_unregister_driver(&ipw_driver);
		return ret;
	}

	return ret;
}

static void __exit ipw_exit(void)
{
	driver_remove_file(&ipw_driver.driver, &driver_attr_debug_level);
	pci_unregister_driver(&ipw_driver);
}

module_param(disable, int, 0444);
MODULE_PARM_DESC(disable, "manually disable the radio (default 0 [radio on])");

module_param(associate, int, 0444);
MODULE_PARM_DESC(associate, "auto associate when scanning (default on)");

module_param(auto_create, int, 0444);
MODULE_PARM_DESC(auto_create, "auto create adhoc network (default on)");

module_param(debug, int, 0444);
MODULE_PARM_DESC(debug, "debug output mask");

module_param(channel, int, 0444);
MODULE_PARM_DESC(channel, "channel to limit associate to (default 0 [ANY])"); 

module_param(ifname, charp, 0444);
MODULE_PARM_DESC(ifname, "network device name (default eth%d)");

#ifdef CONFIG_IPW_PROMISC	
module_param(mode, int, 0444);
MODULE_PARM_DESC(mode, "network mode (0=BSS,1=IBSS,2=Monitor)");
#else
module_param(mode, int, 0444);
MODULE_PARM_DESC(mode, "network mode (0=BSS,1=IBSS)");
#endif

module_exit(ipw_exit);
module_init(ipw_init);