iwl-4965.c 62.4 KB
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/******************************************************************************
 *
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 * Copyright(c) 2003 - 2011 Intel Corporation. All rights reserved.
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 *
 * This program is free software; you can redistribute it and/or modify it
 * under the terms of version 2 of the GNU General Public License as
 * published by the Free Software Foundation.
 *
 * This program is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
 * more details.
 *
 * You should have received a copy of the GNU General Public License along with
 * this program; if not, write to the Free Software Foundation, Inc.,
 * 51 Franklin Street, Fifth Floor, Boston, MA 02110, USA
 *
 * The full GNU General Public License is included in this distribution in the
 * file called LICENSE.
 *
 * Contact Information:
 *  Intel Linux Wireless <ilw@linux.intel.com>
 * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
 *
 *****************************************************************************/

#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/init.h>
#include <linux/pci.h>
#include <linux/dma-mapping.h>
#include <linux/delay.h>
#include <linux/sched.h>
#include <linux/skbuff.h>
#include <linux/netdevice.h>
#include <linux/wireless.h>
#include <net/mac80211.h>
#include <linux/etherdevice.h>
#include <asm/unaligned.h>

#include "iwl-eeprom.h"
#include "iwl-dev.h"
#include "iwl-core.h"
#include "iwl-io.h"
#include "iwl-helpers.h"
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#include "iwl-4965-calib.h"
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#include "iwl-sta.h"
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#include "iwl-4965-led.h"
#include "iwl-4965.h"
#include "iwl-4965-debugfs.h"
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static int iwl4965_send_tx_power(struct iwl_priv *priv);
static int iwl4965_hw_get_temperature(struct iwl_priv *priv);

/* Highest firmware API version supported */
#define IWL4965_UCODE_API_MAX 2

/* Lowest firmware API version supported */
#define IWL4965_UCODE_API_MIN 2

#define IWL4965_FW_PRE "iwlwifi-4965-"
#define _IWL4965_MODULE_FIRMWARE(api) IWL4965_FW_PRE #api ".ucode"
#define IWL4965_MODULE_FIRMWARE(api) _IWL4965_MODULE_FIRMWARE(api)

/* check contents of special bootstrap uCode SRAM */
static int iwl4965_verify_bsm(struct iwl_priv *priv)
{
	__le32 *image = priv->ucode_boot.v_addr;
	u32 len = priv->ucode_boot.len;
	u32 reg;
	u32 val;

	IWL_DEBUG_INFO(priv, "Begin verify bsm\n");

	/* verify BSM SRAM contents */
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	val = iwl_legacy_read_prph(priv, BSM_WR_DWCOUNT_REG);
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	for (reg = BSM_SRAM_LOWER_BOUND;
	     reg < BSM_SRAM_LOWER_BOUND + len;
	     reg += sizeof(u32), image++) {
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		val = iwl_legacy_read_prph(priv, reg);
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		if (val != le32_to_cpu(*image)) {
			IWL_ERR(priv, "BSM uCode verification failed at "
				  "addr 0x%08X+%u (of %u), is 0x%x, s/b 0x%x\n",
				  BSM_SRAM_LOWER_BOUND,
				  reg - BSM_SRAM_LOWER_BOUND, len,
				  val, le32_to_cpu(*image));
			return -EIO;
		}
	}

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

	return 0;
}

/**
 * iwl4965_load_bsm - Load bootstrap instructions
 *
 * BSM operation:
 *
 * The Bootstrap State Machine (BSM) stores a short bootstrap uCode program
 * in special SRAM that does not power down during RFKILL.  When powering back
 * up after power-saving sleeps (or during initial uCode load), the BSM loads
 * the bootstrap program into the on-board processor, and starts it.
 *
 * The bootstrap program loads (via DMA) instructions and data for a new
 * program from host DRAM locations indicated by the host driver in the
 * BSM_DRAM_* registers.  Once the new program is loaded, it starts
 * automatically.
 *
 * When initializing the NIC, the host driver points the BSM to the
 * "initialize" uCode image.  This uCode sets up some internal data, then
 * notifies host via "initialize alive" that it is complete.
 *
 * The host then replaces the BSM_DRAM_* pointer values to point to the
 * normal runtime uCode instructions and a backup uCode data cache buffer
 * (filled initially with starting data values for the on-board processor),
 * then triggers the "initialize" uCode to load and launch the runtime uCode,
 * which begins normal operation.
 *
 * When doing a power-save shutdown, runtime uCode saves data SRAM into
 * the backup data cache in DRAM before SRAM is powered down.
 *
 * When powering back up, the BSM loads the bootstrap program.  This reloads
 * the runtime uCode instructions and the backup data cache into SRAM,
 * and re-launches the runtime uCode from where it left off.
 */
static int iwl4965_load_bsm(struct iwl_priv *priv)
{
	__le32 *image = priv->ucode_boot.v_addr;
	u32 len = priv->ucode_boot.len;
	dma_addr_t pinst;
	dma_addr_t pdata;
	u32 inst_len;
	u32 data_len;
	int i;
	u32 done;
	u32 reg_offset;
	int ret;

	IWL_DEBUG_INFO(priv, "Begin load bsm\n");

	priv->ucode_type = UCODE_RT;

	/* make sure bootstrap program is no larger than BSM's SRAM size */
	if (len > IWL49_MAX_BSM_SIZE)
		return -EINVAL;

	/* Tell bootstrap uCode where to find the "Initialize" uCode
	 *   in host DRAM ... host DRAM physical address bits 35:4 for 4965.
	 * NOTE:  iwl_init_alive_start() will replace these values,
	 *        after the "initialize" uCode has run, to point to
	 *        runtime/protocol instructions and backup data cache.
	 */
	pinst = priv->ucode_init.p_addr >> 4;
	pdata = priv->ucode_init_data.p_addr >> 4;
	inst_len = priv->ucode_init.len;
	data_len = priv->ucode_init_data.len;

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	iwl_legacy_write_prph(priv, BSM_DRAM_INST_PTR_REG, pinst);
	iwl_legacy_write_prph(priv, BSM_DRAM_DATA_PTR_REG, pdata);
	iwl_legacy_write_prph(priv, BSM_DRAM_INST_BYTECOUNT_REG, inst_len);
	iwl_legacy_write_prph(priv, BSM_DRAM_DATA_BYTECOUNT_REG, data_len);
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	/* Fill BSM memory with bootstrap instructions */
	for (reg_offset = BSM_SRAM_LOWER_BOUND;
	     reg_offset < BSM_SRAM_LOWER_BOUND + len;
	     reg_offset += sizeof(u32), image++)
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		_iwl_legacy_write_prph(priv, reg_offset, le32_to_cpu(*image));
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	ret = iwl4965_verify_bsm(priv);
	if (ret)
		return ret;

	/* Tell BSM to copy from BSM SRAM into instruction SRAM, when asked */
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	iwl_legacy_write_prph(priv, BSM_WR_MEM_SRC_REG, 0x0);
	iwl_legacy_write_prph(priv,
			BSM_WR_MEM_DST_REG, IWL49_RTC_INST_LOWER_BOUND);
	iwl_legacy_write_prph(priv, BSM_WR_DWCOUNT_REG, len / sizeof(u32));
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	/* Load bootstrap code into instruction SRAM now,
	 *   to prepare to load "initialize" uCode */
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	iwl_legacy_write_prph(priv, BSM_WR_CTRL_REG, BSM_WR_CTRL_REG_BIT_START);
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	/* Wait for load of bootstrap uCode to finish */
	for (i = 0; i < 100; i++) {
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		done = iwl_legacy_read_prph(priv, BSM_WR_CTRL_REG);
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		if (!(done & BSM_WR_CTRL_REG_BIT_START))
			break;
		udelay(10);
	}
	if (i < 100)
		IWL_DEBUG_INFO(priv, "BSM write complete, poll %d iterations\n", i);
	else {
		IWL_ERR(priv, "BSM write did not complete!\n");
		return -EIO;
	}

	/* Enable future boot loads whenever power management unit triggers it
	 *   (e.g. when powering back up after power-save shutdown) */
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	iwl_legacy_write_prph(priv,
			BSM_WR_CTRL_REG, BSM_WR_CTRL_REG_BIT_START_EN);
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	return 0;
}

/**
 * iwl4965_set_ucode_ptrs - Set uCode address location
 *
 * Tell initialization uCode where to find runtime uCode.
 *
 * BSM registers initially contain pointers to initialization uCode.
 * We need to replace them to load runtime uCode inst and data,
 * and to save runtime data when powering down.
 */
static int iwl4965_set_ucode_ptrs(struct iwl_priv *priv)
{
	dma_addr_t pinst;
	dma_addr_t pdata;
	int ret = 0;

	/* bits 35:4 for 4965 */
	pinst = priv->ucode_code.p_addr >> 4;
	pdata = priv->ucode_data_backup.p_addr >> 4;

	/* Tell bootstrap uCode where to find image to load */
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	iwl_legacy_write_prph(priv, BSM_DRAM_INST_PTR_REG, pinst);
	iwl_legacy_write_prph(priv, BSM_DRAM_DATA_PTR_REG, pdata);
	iwl_legacy_write_prph(priv, BSM_DRAM_DATA_BYTECOUNT_REG,
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				 priv->ucode_data.len);

	/* Inst byte count must be last to set up, bit 31 signals uCode
	 *   that all new ptr/size info is in place */
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	iwl_legacy_write_prph(priv, BSM_DRAM_INST_BYTECOUNT_REG,
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				 priv->ucode_code.len | BSM_DRAM_INST_LOAD);
	IWL_DEBUG_INFO(priv, "Runtime uCode pointers are set.\n");

	return ret;
}

/**
 * iwl4965_init_alive_start - Called after REPLY_ALIVE notification received
 *
 * Called after REPLY_ALIVE notification received from "initialize" uCode.
 *
 * The 4965 "initialize" ALIVE reply contains calibration data for:
 *   Voltage, temperature, and MIMO tx gain correction, now stored in priv
 *   (3945 does not contain this data).
 *
 * Tell "initialize" uCode to go ahead and load the runtime uCode.
*/
static void iwl4965_init_alive_start(struct iwl_priv *priv)
{
	/* Bootstrap uCode has loaded initialize uCode ... verify inst image.
	 * This is a paranoid check, because we would not have gotten the
	 * "initialize" alive if code weren't properly loaded.  */
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	if (iwl4965_verify_ucode(priv)) {
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		/* Runtime instruction load was bad;
		 * take it all the way back down so we can try again */
		IWL_DEBUG_INFO(priv, "Bad \"initialize\" uCode load.\n");
		goto restart;
	}

	/* Calculate temperature */
	priv->temperature = iwl4965_hw_get_temperature(priv);

	/* Send pointers to protocol/runtime uCode image ... init code will
	 * load and launch runtime uCode, which will send us another "Alive"
	 * notification. */
	IWL_DEBUG_INFO(priv, "Initialization Alive received.\n");
	if (iwl4965_set_ucode_ptrs(priv)) {
		/* Runtime instruction load won't happen;
		 * take it all the way back down so we can try again */
		IWL_DEBUG_INFO(priv, "Couldn't set up uCode pointers.\n");
		goto restart;
	}
	return;

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

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static bool iw4965_is_ht40_channel(__le32 rxon_flags)
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{
	int chan_mod = le32_to_cpu(rxon_flags & RXON_FLG_CHANNEL_MODE_MSK)
				    >> RXON_FLG_CHANNEL_MODE_POS;
	return ((chan_mod == CHANNEL_MODE_PURE_40) ||
		  (chan_mod == CHANNEL_MODE_MIXED));
}

static void iwl4965_nic_config(struct iwl_priv *priv)
{
	unsigned long flags;
	u16 radio_cfg;

	spin_lock_irqsave(&priv->lock, flags);

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	radio_cfg = iwl_legacy_eeprom_query16(priv, EEPROM_RADIO_CONFIG);
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	/* write radio config values to register */
	if (EEPROM_RF_CFG_TYPE_MSK(radio_cfg) == EEPROM_4965_RF_CFG_TYPE_MAX)
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		iwl_legacy_set_bit(priv, CSR_HW_IF_CONFIG_REG,
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			    EEPROM_RF_CFG_TYPE_MSK(radio_cfg) |
			    EEPROM_RF_CFG_STEP_MSK(radio_cfg) |
			    EEPROM_RF_CFG_DASH_MSK(radio_cfg));

	/* set CSR_HW_CONFIG_REG for uCode use */
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	iwl_legacy_set_bit(priv, CSR_HW_IF_CONFIG_REG,
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		    CSR_HW_IF_CONFIG_REG_BIT_RADIO_SI |
		    CSR_HW_IF_CONFIG_REG_BIT_MAC_SI);

	priv->calib_info = (struct iwl_eeprom_calib_info *)
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		iwl_legacy_eeprom_query_addr(priv,
				EEPROM_4965_CALIB_TXPOWER_OFFSET);
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	spin_unlock_irqrestore(&priv->lock, flags);
}

/* Reset differential Rx gains in NIC to prepare for chain noise calibration.
 * Called after every association, but this runs only once!
 *  ... once chain noise is calibrated the first time, it's good forever.  */
static void iwl4965_chain_noise_reset(struct iwl_priv *priv)
{
	struct iwl_chain_noise_data *data = &(priv->chain_noise_data);

	if ((data->state == IWL_CHAIN_NOISE_ALIVE) &&
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	    iwl_legacy_is_any_associated(priv)) {
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		struct iwl_calib_diff_gain_cmd cmd;

		/* clear data for chain noise calibration algorithm */
		data->chain_noise_a = 0;
		data->chain_noise_b = 0;
		data->chain_noise_c = 0;
		data->chain_signal_a = 0;
		data->chain_signal_b = 0;
		data->chain_signal_c = 0;
		data->beacon_count = 0;

		memset(&cmd, 0, sizeof(cmd));
		cmd.hdr.op_code = IWL_PHY_CALIBRATE_DIFF_GAIN_CMD;
		cmd.diff_gain_a = 0;
		cmd.diff_gain_b = 0;
		cmd.diff_gain_c = 0;
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		if (iwl_legacy_send_cmd_pdu(priv, REPLY_PHY_CALIBRATION_CMD,
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				 sizeof(cmd), &cmd))
			IWL_ERR(priv,
				"Could not send REPLY_PHY_CALIBRATION_CMD\n");
		data->state = IWL_CHAIN_NOISE_ACCUMULATE;
		IWL_DEBUG_CALIB(priv, "Run chain_noise_calibrate\n");
	}
}

static struct iwl_sensitivity_ranges iwl4965_sensitivity = {
	.min_nrg_cck = 97,
	.max_nrg_cck = 0, /* not used, set to 0 */

	.auto_corr_min_ofdm = 85,
	.auto_corr_min_ofdm_mrc = 170,
	.auto_corr_min_ofdm_x1 = 105,
	.auto_corr_min_ofdm_mrc_x1 = 220,

	.auto_corr_max_ofdm = 120,
	.auto_corr_max_ofdm_mrc = 210,
	.auto_corr_max_ofdm_x1 = 140,
	.auto_corr_max_ofdm_mrc_x1 = 270,

	.auto_corr_min_cck = 125,
	.auto_corr_max_cck = 200,
	.auto_corr_min_cck_mrc = 200,
	.auto_corr_max_cck_mrc = 400,

	.nrg_th_cck = 100,
	.nrg_th_ofdm = 100,

	.barker_corr_th_min = 190,
	.barker_corr_th_min_mrc = 390,
	.nrg_th_cca = 62,
};

static void iwl4965_set_ct_threshold(struct iwl_priv *priv)
{
	/* want Kelvin */
	priv->hw_params.ct_kill_threshold =
		CELSIUS_TO_KELVIN(CT_KILL_THRESHOLD_LEGACY);
}

/**
 * iwl4965_hw_set_hw_params
 *
 * Called when initializing driver
 */
static int iwl4965_hw_set_hw_params(struct iwl_priv *priv)
{
	if (priv->cfg->mod_params->num_of_queues >= IWL_MIN_NUM_QUEUES &&
	    priv->cfg->mod_params->num_of_queues <= IWL49_NUM_QUEUES)
		priv->cfg->base_params->num_of_queues =
			priv->cfg->mod_params->num_of_queues;

	priv->hw_params.max_txq_num = priv->cfg->base_params->num_of_queues;
	priv->hw_params.dma_chnl_num = FH49_TCSR_CHNL_NUM;
	priv->hw_params.scd_bc_tbls_size =
			priv->cfg->base_params->num_of_queues *
			sizeof(struct iwl4965_scd_bc_tbl);
	priv->hw_params.tfd_size = sizeof(struct iwl_tfd);
	priv->hw_params.max_stations = IWL4965_STATION_COUNT;
	priv->contexts[IWL_RXON_CTX_BSS].bcast_sta_id = IWL4965_BROADCAST_ID;
	priv->hw_params.max_data_size = IWL49_RTC_DATA_SIZE;
	priv->hw_params.max_inst_size = IWL49_RTC_INST_SIZE;
	priv->hw_params.max_bsm_size = BSM_SRAM_SIZE;
	priv->hw_params.ht40_channel = BIT(IEEE80211_BAND_5GHZ);

	priv->hw_params.rx_wrt_ptr_reg = FH_RSCSR_CHNL0_WPTR;

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	priv->hw_params.tx_chains_num = iwl4965_num_of_ant(priv->cfg->valid_tx_ant);
	priv->hw_params.rx_chains_num = iwl4965_num_of_ant(priv->cfg->valid_rx_ant);
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	priv->hw_params.valid_tx_ant = priv->cfg->valid_tx_ant;
	priv->hw_params.valid_rx_ant = priv->cfg->valid_rx_ant;

	iwl4965_set_ct_threshold(priv);

	priv->hw_params.sens = &iwl4965_sensitivity;
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	priv->hw_params.beacon_time_tsf_bits = IWL4965_EXT_BEACON_TIME_POS;
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	return 0;
}

static s32 iwl4965_math_div_round(s32 num, s32 denom, s32 *res)
{
	s32 sign = 1;

	if (num < 0) {
		sign = -sign;
		num = -num;
	}
	if (denom < 0) {
		sign = -sign;
		denom = -denom;
	}
	*res = 1;
	*res = ((num * 2 + denom) / (denom * 2)) * sign;

	return 1;
}

/**
 * iwl4965_get_voltage_compensation - Power supply voltage comp for txpower
 *
 * Determines power supply voltage compensation for txpower calculations.
 * Returns number of 1/2-dB steps to subtract from gain table index,
 * to compensate for difference between power supply voltage during
 * factory measurements, vs. current power supply voltage.
 *
 * Voltage indication is higher for lower voltage.
 * Lower voltage requires more gain (lower gain table index).
 */
static s32 iwl4965_get_voltage_compensation(s32 eeprom_voltage,
					    s32 current_voltage)
{
	s32 comp = 0;

	if ((TX_POWER_IWL_ILLEGAL_VOLTAGE == eeprom_voltage) ||
	    (TX_POWER_IWL_ILLEGAL_VOLTAGE == current_voltage))
		return 0;

	iwl4965_math_div_round(current_voltage - eeprom_voltage,
			       TX_POWER_IWL_VOLTAGE_CODES_PER_03V, &comp);

	if (current_voltage > eeprom_voltage)
		comp *= 2;
	if ((comp < -2) || (comp > 2))
		comp = 0;

	return comp;
}

static s32 iwl4965_get_tx_atten_grp(u16 channel)
{
	if (channel >= CALIB_IWL_TX_ATTEN_GR5_FCH &&
	    channel <= CALIB_IWL_TX_ATTEN_GR5_LCH)
		return CALIB_CH_GROUP_5;

	if (channel >= CALIB_IWL_TX_ATTEN_GR1_FCH &&
	    channel <= CALIB_IWL_TX_ATTEN_GR1_LCH)
		return CALIB_CH_GROUP_1;

	if (channel >= CALIB_IWL_TX_ATTEN_GR2_FCH &&
	    channel <= CALIB_IWL_TX_ATTEN_GR2_LCH)
		return CALIB_CH_GROUP_2;

	if (channel >= CALIB_IWL_TX_ATTEN_GR3_FCH &&
	    channel <= CALIB_IWL_TX_ATTEN_GR3_LCH)
		return CALIB_CH_GROUP_3;

	if (channel >= CALIB_IWL_TX_ATTEN_GR4_FCH &&
	    channel <= CALIB_IWL_TX_ATTEN_GR4_LCH)
		return CALIB_CH_GROUP_4;

	return -1;
}

static u32 iwl4965_get_sub_band(const struct iwl_priv *priv, u32 channel)
{
	s32 b = -1;

	for (b = 0; b < EEPROM_TX_POWER_BANDS; b++) {
		if (priv->calib_info->band_info[b].ch_from == 0)
			continue;

		if ((channel >= priv->calib_info->band_info[b].ch_from)
		    && (channel <= priv->calib_info->band_info[b].ch_to))
			break;
	}

	return b;
}

static s32 iwl4965_interpolate_value(s32 x, s32 x1, s32 y1, s32 x2, s32 y2)
{
	s32 val;

	if (x2 == x1)
		return y1;
	else {
		iwl4965_math_div_round((x2 - x) * (y1 - y2), (x2 - x1), &val);
		return val + y2;
	}
}

/**
 * iwl4965_interpolate_chan - Interpolate factory measurements for one channel
 *
 * Interpolates factory measurements from the two sample channels within a
 * sub-band, to apply to channel of interest.  Interpolation is proportional to
 * differences in channel frequencies, which is proportional to differences
 * in channel number.
 */
static int iwl4965_interpolate_chan(struct iwl_priv *priv, u32 channel,
				    struct iwl_eeprom_calib_ch_info *chan_info)
{
	s32 s = -1;
	u32 c;
	u32 m;
	const struct iwl_eeprom_calib_measure *m1;
	const struct iwl_eeprom_calib_measure *m2;
	struct iwl_eeprom_calib_measure *omeas;
	u32 ch_i1;
	u32 ch_i2;

	s = iwl4965_get_sub_band(priv, channel);
	if (s >= EEPROM_TX_POWER_BANDS) {
		IWL_ERR(priv, "Tx Power can not find channel %d\n", channel);
		return -1;
	}

	ch_i1 = priv->calib_info->band_info[s].ch1.ch_num;
	ch_i2 = priv->calib_info->band_info[s].ch2.ch_num;
	chan_info->ch_num = (u8) channel;

	IWL_DEBUG_TXPOWER(priv, "channel %d subband %d factory cal ch %d & %d\n",
			  channel, s, ch_i1, ch_i2);

	for (c = 0; c < EEPROM_TX_POWER_TX_CHAINS; c++) {
		for (m = 0; m < EEPROM_TX_POWER_MEASUREMENTS; m++) {
			m1 = &(priv->calib_info->band_info[s].ch1.
			       measurements[c][m]);
			m2 = &(priv->calib_info->band_info[s].ch2.
			       measurements[c][m]);
			omeas = &(chan_info->measurements[c][m]);

			omeas->actual_pow =
			    (u8) iwl4965_interpolate_value(channel, ch_i1,
							   m1->actual_pow,
							   ch_i2,
							   m2->actual_pow);
			omeas->gain_idx =
			    (u8) iwl4965_interpolate_value(channel, ch_i1,
							   m1->gain_idx, ch_i2,
							   m2->gain_idx);
			omeas->temperature =
			    (u8) iwl4965_interpolate_value(channel, ch_i1,
							   m1->temperature,
							   ch_i2,
							   m2->temperature);
			omeas->pa_det =
			    (s8) iwl4965_interpolate_value(channel, ch_i1,
							   m1->pa_det, ch_i2,
							   m2->pa_det);

			IWL_DEBUG_TXPOWER(priv,
				"chain %d meas %d AP1=%d AP2=%d AP=%d\n", c, m,
				m1->actual_pow, m2->actual_pow, omeas->actual_pow);
			IWL_DEBUG_TXPOWER(priv,
				"chain %d meas %d NI1=%d NI2=%d NI=%d\n", c, m,
				m1->gain_idx, m2->gain_idx, omeas->gain_idx);
			IWL_DEBUG_TXPOWER(priv,
				"chain %d meas %d PA1=%d PA2=%d PA=%d\n", c, m,
				m1->pa_det, m2->pa_det, omeas->pa_det);
			IWL_DEBUG_TXPOWER(priv,
				"chain %d meas %d  T1=%d  T2=%d  T=%d\n", c, m,
				m1->temperature, m2->temperature,
				omeas->temperature);
		}
	}

	return 0;
}

/* bit-rate-dependent table to prevent Tx distortion, in half-dB units,
 * for OFDM 6, 12, 18, 24, 36, 48, 54, 60 MBit, and CCK all rates. */
static s32 back_off_table[] = {
	10, 10, 10, 10, 10, 15, 17, 20,	/* OFDM SISO 20 MHz */
	10, 10, 10, 10, 10, 15, 17, 20,	/* OFDM MIMO 20 MHz */
	10, 10, 10, 10, 10, 15, 17, 20,	/* OFDM SISO 40 MHz */
	10, 10, 10, 10, 10, 15, 17, 20,	/* OFDM MIMO 40 MHz */
	10			/* CCK */
};

/* Thermal compensation values for txpower for various frequency ranges ...
 *   ratios from 3:1 to 4.5:1 of degrees (Celsius) per half-dB gain adjust */
static struct iwl4965_txpower_comp_entry {
	s32 degrees_per_05db_a;
	s32 degrees_per_05db_a_denom;
} tx_power_cmp_tble[CALIB_CH_GROUP_MAX] = {
	{9, 2},			/* group 0 5.2, ch  34-43 */
	{4, 1},			/* group 1 5.2, ch  44-70 */
	{4, 1},			/* group 2 5.2, ch  71-124 */
	{4, 1},			/* group 3 5.2, ch 125-200 */
	{3, 1}			/* group 4 2.4, ch   all */
};

static s32 get_min_power_index(s32 rate_power_index, u32 band)
{
	if (!band) {
		if ((rate_power_index & 7) <= 4)
			return MIN_TX_GAIN_INDEX_52GHZ_EXT;
	}
	return MIN_TX_GAIN_INDEX;
}

struct gain_entry {
	u8 dsp;
	u8 radio;
};

static const struct gain_entry gain_table[2][108] = {
	/* 5.2GHz power gain index table */
	{
	 {123, 0x3F},		/* highest txpower */
	 {117, 0x3F},
	 {110, 0x3F},
	 {104, 0x3F},
	 {98, 0x3F},
	 {110, 0x3E},
	 {104, 0x3E},
	 {98, 0x3E},
	 {110, 0x3D},
	 {104, 0x3D},
	 {98, 0x3D},
	 {110, 0x3C},
	 {104, 0x3C},
	 {98, 0x3C},
	 {110, 0x3B},
	 {104, 0x3B},
	 {98, 0x3B},
	 {110, 0x3A},
	 {104, 0x3A},
	 {98, 0x3A},
	 {110, 0x39},
	 {104, 0x39},
	 {98, 0x39},
	 {110, 0x38},
	 {104, 0x38},
	 {98, 0x38},
	 {110, 0x37},
	 {104, 0x37},
	 {98, 0x37},
	 {110, 0x36},
	 {104, 0x36},
	 {98, 0x36},
	 {110, 0x35},
	 {104, 0x35},
	 {98, 0x35},
	 {110, 0x34},
	 {104, 0x34},
	 {98, 0x34},
	 {110, 0x33},
	 {104, 0x33},
	 {98, 0x33},
	 {110, 0x32},
	 {104, 0x32},
	 {98, 0x32},
	 {110, 0x31},
	 {104, 0x31},
	 {98, 0x31},
	 {110, 0x30},
	 {104, 0x30},
	 {98, 0x30},
	 {110, 0x25},
	 {104, 0x25},
	 {98, 0x25},
	 {110, 0x24},
	 {104, 0x24},
	 {98, 0x24},
	 {110, 0x23},
	 {104, 0x23},
	 {98, 0x23},
	 {110, 0x22},
	 {104, 0x18},
	 {98, 0x18},
	 {110, 0x17},
	 {104, 0x17},
	 {98, 0x17},
	 {110, 0x16},
	 {104, 0x16},
	 {98, 0x16},
	 {110, 0x15},
	 {104, 0x15},
	 {98, 0x15},
	 {110, 0x14},
	 {104, 0x14},
	 {98, 0x14},
	 {110, 0x13},
	 {104, 0x13},
	 {98, 0x13},
	 {110, 0x12},
	 {104, 0x08},
	 {98, 0x08},
	 {110, 0x07},
	 {104, 0x07},
	 {98, 0x07},
	 {110, 0x06},
	 {104, 0x06},
	 {98, 0x06},
	 {110, 0x05},
	 {104, 0x05},
	 {98, 0x05},
	 {110, 0x04},
	 {104, 0x04},
	 {98, 0x04},
	 {110, 0x03},
	 {104, 0x03},
	 {98, 0x03},
	 {110, 0x02},
	 {104, 0x02},
	 {98, 0x02},
	 {110, 0x01},
	 {104, 0x01},
	 {98, 0x01},
	 {110, 0x00},
	 {104, 0x00},
	 {98, 0x00},
	 {93, 0x00},
	 {88, 0x00},
	 {83, 0x00},
	 {78, 0x00},
	 },
	/* 2.4GHz power gain index table */
	{
	 {110, 0x3f},		/* highest txpower */
	 {104, 0x3f},
	 {98, 0x3f},
	 {110, 0x3e},
	 {104, 0x3e},
	 {98, 0x3e},
	 {110, 0x3d},
	 {104, 0x3d},
	 {98, 0x3d},
	 {110, 0x3c},
	 {104, 0x3c},
	 {98, 0x3c},
	 {110, 0x3b},
	 {104, 0x3b},
	 {98, 0x3b},
	 {110, 0x3a},
	 {104, 0x3a},
	 {98, 0x3a},
	 {110, 0x39},
	 {104, 0x39},
	 {98, 0x39},
	 {110, 0x38},
	 {104, 0x38},
	 {98, 0x38},
	 {110, 0x37},
	 {104, 0x37},
	 {98, 0x37},
	 {110, 0x36},
	 {104, 0x36},
	 {98, 0x36},
	 {110, 0x35},
	 {104, 0x35},
	 {98, 0x35},
	 {110, 0x34},
	 {104, 0x34},
	 {98, 0x34},
	 {110, 0x33},
	 {104, 0x33},
	 {98, 0x33},
	 {110, 0x32},
	 {104, 0x32},
	 {98, 0x32},
	 {110, 0x31},
	 {104, 0x31},
	 {98, 0x31},
	 {110, 0x30},
	 {104, 0x30},
	 {98, 0x30},
	 {110, 0x6},
	 {104, 0x6},
	 {98, 0x6},
	 {110, 0x5},
	 {104, 0x5},
	 {98, 0x5},
	 {110, 0x4},
	 {104, 0x4},
	 {98, 0x4},
	 {110, 0x3},
	 {104, 0x3},
	 {98, 0x3},
	 {110, 0x2},
	 {104, 0x2},
	 {98, 0x2},
	 {110, 0x1},
	 {104, 0x1},
	 {98, 0x1},
	 {110, 0x0},
	 {104, 0x0},
	 {98, 0x0},
	 {97, 0},
	 {96, 0},
	 {95, 0},
	 {94, 0},
	 {93, 0},
	 {92, 0},
	 {91, 0},
	 {90, 0},
	 {89, 0},
	 {88, 0},
	 {87, 0},
	 {86, 0},
	 {85, 0},
	 {84, 0},
	 {83, 0},
	 {82, 0},
	 {81, 0},
	 {80, 0},
	 {79, 0},
	 {78, 0},
	 {77, 0},
	 {76, 0},
	 {75, 0},
	 {74, 0},
	 {73, 0},
	 {72, 0},
	 {71, 0},
	 {70, 0},
	 {69, 0},
	 {68, 0},
	 {67, 0},
	 {66, 0},
	 {65, 0},
	 {64, 0},
	 {63, 0},
	 {62, 0},
	 {61, 0},
	 {60, 0},
	 {59, 0},
	 }
};

static int iwl4965_fill_txpower_tbl(struct iwl_priv *priv, u8 band, u16 channel,
				    u8 is_ht40, u8 ctrl_chan_high,
				    struct iwl4965_tx_power_db *tx_power_tbl)
{
	u8 saturation_power;
	s32 target_power;
	s32 user_target_power;
	s32 power_limit;
	s32 current_temp;
	s32 reg_limit;
	s32 current_regulatory;
	s32 txatten_grp = CALIB_CH_GROUP_MAX;
	int i;
	int c;
	const struct iwl_channel_info *ch_info = NULL;
	struct iwl_eeprom_calib_ch_info ch_eeprom_info;
	const struct iwl_eeprom_calib_measure *measurement;
	s16 voltage;
	s32 init_voltage;
	s32 voltage_compensation;
	s32 degrees_per_05db_num;
	s32 degrees_per_05db_denom;
	s32 factory_temp;
	s32 temperature_comp[2];
	s32 factory_gain_index[2];
	s32 factory_actual_pwr[2];
	s32 power_index;

	/* tx_power_user_lmt is in dBm, convert to half-dBm (half-dB units
	 *   are used for indexing into txpower table) */
	user_target_power = 2 * priv->tx_power_user_lmt;

	/* Get current (RXON) channel, band, width */
	IWL_DEBUG_TXPOWER(priv, "chan %d band %d is_ht40 %d\n", channel, band,
			  is_ht40);

907
	ch_info = iwl_legacy_get_channel_info(priv, priv->band, channel);
908

909
	if (!iwl_legacy_is_channel_valid(ch_info))
910 911 912 913 914 915 916 917 918 919 920 921 922 923 924 925 926 927 928 929 930 931 932 933 934 935 936 937 938 939 940 941 942 943 944 945 946 947 948 949 950 951 952 953 954 955 956 957 958 959 960 961 962 963 964 965 966 967 968 969 970 971 972 973 974 975 976 977 978 979 980 981 982 983 984 985 986 987 988 989 990 991 992 993 994 995 996 997 998 999 1000 1001 1002 1003 1004 1005 1006 1007 1008 1009 1010 1011 1012 1013 1014 1015 1016 1017 1018 1019 1020 1021 1022 1023 1024 1025 1026 1027 1028 1029 1030 1031 1032 1033 1034 1035 1036 1037 1038 1039 1040 1041 1042 1043 1044 1045 1046 1047 1048 1049 1050 1051 1052 1053 1054 1055 1056 1057 1058 1059 1060 1061 1062 1063 1064 1065 1066 1067 1068 1069 1070 1071 1072 1073 1074 1075 1076 1077 1078 1079 1080 1081 1082 1083 1084 1085 1086 1087 1088 1089 1090 1091 1092 1093 1094 1095 1096 1097 1098 1099 1100 1101 1102 1103 1104 1105 1106 1107 1108 1109 1110 1111 1112 1113 1114 1115 1116 1117 1118 1119 1120 1121 1122 1123 1124 1125 1126 1127 1128 1129 1130 1131 1132
		return -EINVAL;

	/* get txatten group, used to select 1) thermal txpower adjustment
	 *   and 2) mimo txpower balance between Tx chains. */
	txatten_grp = iwl4965_get_tx_atten_grp(channel);
	if (txatten_grp < 0) {
		IWL_ERR(priv, "Can't find txatten group for channel %d.\n",
			  channel);
		return -EINVAL;
	}

	IWL_DEBUG_TXPOWER(priv, "channel %d belongs to txatten group %d\n",
			  channel, txatten_grp);

	if (is_ht40) {
		if (ctrl_chan_high)
			channel -= 2;
		else
			channel += 2;
	}

	/* hardware txpower limits ...
	 * saturation (clipping distortion) txpowers are in half-dBm */
	if (band)
		saturation_power = priv->calib_info->saturation_power24;
	else
		saturation_power = priv->calib_info->saturation_power52;

	if (saturation_power < IWL_TX_POWER_SATURATION_MIN ||
	    saturation_power > IWL_TX_POWER_SATURATION_MAX) {
		if (band)
			saturation_power = IWL_TX_POWER_DEFAULT_SATURATION_24;
		else
			saturation_power = IWL_TX_POWER_DEFAULT_SATURATION_52;
	}

	/* regulatory txpower limits ... reg_limit values are in half-dBm,
	 *   max_power_avg values are in dBm, convert * 2 */
	if (is_ht40)
		reg_limit = ch_info->ht40_max_power_avg * 2;
	else
		reg_limit = ch_info->max_power_avg * 2;

	if ((reg_limit < IWL_TX_POWER_REGULATORY_MIN) ||
	    (reg_limit > IWL_TX_POWER_REGULATORY_MAX)) {
		if (band)
			reg_limit = IWL_TX_POWER_DEFAULT_REGULATORY_24;
		else
			reg_limit = IWL_TX_POWER_DEFAULT_REGULATORY_52;
	}

	/* Interpolate txpower calibration values for this channel,
	 *   based on factory calibration tests on spaced channels. */
	iwl4965_interpolate_chan(priv, channel, &ch_eeprom_info);

	/* calculate tx gain adjustment based on power supply voltage */
	voltage = le16_to_cpu(priv->calib_info->voltage);
	init_voltage = (s32)le32_to_cpu(priv->card_alive_init.voltage);
	voltage_compensation =
	    iwl4965_get_voltage_compensation(voltage, init_voltage);

	IWL_DEBUG_TXPOWER(priv, "curr volt %d eeprom volt %d volt comp %d\n",
			  init_voltage,
			  voltage, voltage_compensation);

	/* get current temperature (Celsius) */
	current_temp = max(priv->temperature, IWL_TX_POWER_TEMPERATURE_MIN);
	current_temp = min(priv->temperature, IWL_TX_POWER_TEMPERATURE_MAX);
	current_temp = KELVIN_TO_CELSIUS(current_temp);

	/* select thermal txpower adjustment params, based on channel group
	 *   (same frequency group used for mimo txatten adjustment) */
	degrees_per_05db_num =
	    tx_power_cmp_tble[txatten_grp].degrees_per_05db_a;
	degrees_per_05db_denom =
	    tx_power_cmp_tble[txatten_grp].degrees_per_05db_a_denom;

	/* get per-chain txpower values from factory measurements */
	for (c = 0; c < 2; c++) {
		measurement = &ch_eeprom_info.measurements[c][1];

		/* txgain adjustment (in half-dB steps) based on difference
		 *   between factory and current temperature */
		factory_temp = measurement->temperature;
		iwl4965_math_div_round((current_temp - factory_temp) *
				       degrees_per_05db_denom,
				       degrees_per_05db_num,
				       &temperature_comp[c]);

		factory_gain_index[c] = measurement->gain_idx;
		factory_actual_pwr[c] = measurement->actual_pow;

		IWL_DEBUG_TXPOWER(priv, "chain = %d\n", c);
		IWL_DEBUG_TXPOWER(priv, "fctry tmp %d, "
				  "curr tmp %d, comp %d steps\n",
				  factory_temp, current_temp,
				  temperature_comp[c]);

		IWL_DEBUG_TXPOWER(priv, "fctry idx %d, fctry pwr %d\n",
				  factory_gain_index[c],
				  factory_actual_pwr[c]);
	}

	/* for each of 33 bit-rates (including 1 for CCK) */
	for (i = 0; i < POWER_TABLE_NUM_ENTRIES; i++) {
		u8 is_mimo_rate;
		union iwl4965_tx_power_dual_stream tx_power;

		/* for mimo, reduce each chain's txpower by half
		 * (3dB, 6 steps), so total output power is regulatory
		 * compliant. */
		if (i & 0x8) {
			current_regulatory = reg_limit -
			    IWL_TX_POWER_MIMO_REGULATORY_COMPENSATION;
			is_mimo_rate = 1;
		} else {
			current_regulatory = reg_limit;
			is_mimo_rate = 0;
		}

		/* find txpower limit, either hardware or regulatory */
		power_limit = saturation_power - back_off_table[i];
		if (power_limit > current_regulatory)
			power_limit = current_regulatory;

		/* reduce user's txpower request if necessary
		 * for this rate on this channel */
		target_power = user_target_power;
		if (target_power > power_limit)
			target_power = power_limit;

		IWL_DEBUG_TXPOWER(priv, "rate %d sat %d reg %d usr %d tgt %d\n",
				  i, saturation_power - back_off_table[i],
				  current_regulatory, user_target_power,
				  target_power);

		/* for each of 2 Tx chains (radio transmitters) */
		for (c = 0; c < 2; c++) {
			s32 atten_value;

			if (is_mimo_rate)
				atten_value =
				    (s32)le32_to_cpu(priv->card_alive_init.
				    tx_atten[txatten_grp][c]);
			else
				atten_value = 0;

			/* calculate index; higher index means lower txpower */
			power_index = (u8) (factory_gain_index[c] -
					    (target_power -
					     factory_actual_pwr[c]) -
					    temperature_comp[c] -
					    voltage_compensation +
					    atten_value);

/*			IWL_DEBUG_TXPOWER(priv, "calculated txpower index %d\n",
						power_index); */

			if (power_index < get_min_power_index(i, band))
				power_index = get_min_power_index(i, band);

			/* adjust 5 GHz index to support negative indexes */
			if (!band)
				power_index += 9;

			/* CCK, rate 32, reduce txpower for CCK */
			if (i == POWER_TABLE_CCK_ENTRY)
				power_index +=
				    IWL_TX_POWER_CCK_COMPENSATION_C_STEP;

			/* stay within the table! */
			if (power_index > 107) {
				IWL_WARN(priv, "txpower index %d > 107\n",
					    power_index);
				power_index = 107;
			}
			if (power_index < 0) {
				IWL_WARN(priv, "txpower index %d < 0\n",
					    power_index);
				power_index = 0;
			}

			/* fill txpower command for this rate/chain */
			tx_power.s.radio_tx_gain[c] =
				gain_table[band][power_index].radio;
			tx_power.s.dsp_predis_atten[c] =
				gain_table[band][power_index].dsp;

			IWL_DEBUG_TXPOWER(priv, "chain %d mimo %d index %d "
					  "gain 0x%02x dsp %d\n",
					  c, atten_value, power_index,
					tx_power.s.radio_tx_gain[c],
					tx_power.s.dsp_predis_atten[c]);
		} /* for each chain */

		tx_power_tbl->power_tbl[i].dw = cpu_to_le32(tx_power.dw);

	} /* for each rate */

	return 0;
}

/**
 * iwl4965_send_tx_power - Configure the TXPOWER level user limit
 *
 * Uses the active RXON for channel, band, and characteristics (ht40, high)
 * The power limit is taken from priv->tx_power_user_lmt.
 */
static int iwl4965_send_tx_power(struct iwl_priv *priv)
{
	struct iwl4965_txpowertable_cmd cmd = { 0 };
	int ret;
	u8 band = 0;
	bool is_ht40 = false;
	u8 ctrl_chan_high = 0;
	struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];

	if (WARN_ONCE(test_bit(STATUS_SCAN_HW, &priv->status),
		      "TX Power requested while scanning!\n"))
		return -EAGAIN;

	band = priv->band == IEEE80211_BAND_2GHZ;

1133
	is_ht40 = iw4965_is_ht40_channel(ctx->active.flags);
1134 1135 1136 1137 1138 1139 1140 1141 1142 1143 1144 1145 1146

	if (is_ht40 && (ctx->active.flags & RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK))
		ctrl_chan_high = 1;

	cmd.band = band;
	cmd.channel = ctx->active.channel;

	ret = iwl4965_fill_txpower_tbl(priv, band,
				le16_to_cpu(ctx->active.channel),
				is_ht40, ctrl_chan_high, &cmd.tx_power);
	if (ret)
		goto out;

1147 1148
	ret = iwl_legacy_send_cmd_pdu(priv,
			 REPLY_TX_PWR_TABLE_CMD, sizeof(cmd), &cmd);
1149 1150 1151 1152 1153 1154 1155 1156 1157 1158

out:
	return ret;
}

static int iwl4965_send_rxon_assoc(struct iwl_priv *priv,
				   struct iwl_rxon_context *ctx)
{
	int ret = 0;
	struct iwl4965_rxon_assoc_cmd rxon_assoc;
1159 1160
	const struct iwl_legacy_rxon_cmd *rxon1 = &ctx->staging;
	const struct iwl_legacy_rxon_cmd *rxon2 = &ctx->active;
1161 1162 1163 1164 1165 1166 1167 1168 1169 1170 1171 1172 1173 1174 1175 1176 1177 1178 1179 1180 1181 1182 1183 1184 1185

	if ((rxon1->flags == rxon2->flags) &&
	    (rxon1->filter_flags == rxon2->filter_flags) &&
	    (rxon1->cck_basic_rates == rxon2->cck_basic_rates) &&
	    (rxon1->ofdm_ht_single_stream_basic_rates ==
	     rxon2->ofdm_ht_single_stream_basic_rates) &&
	    (rxon1->ofdm_ht_dual_stream_basic_rates ==
	     rxon2->ofdm_ht_dual_stream_basic_rates) &&
	    (rxon1->rx_chain == rxon2->rx_chain) &&
	    (rxon1->ofdm_basic_rates == rxon2->ofdm_basic_rates)) {
		IWL_DEBUG_INFO(priv, "Using current RXON_ASSOC.  Not resending.\n");
		return 0;
	}

	rxon_assoc.flags = ctx->staging.flags;
	rxon_assoc.filter_flags = ctx->staging.filter_flags;
	rxon_assoc.ofdm_basic_rates = ctx->staging.ofdm_basic_rates;
	rxon_assoc.cck_basic_rates = ctx->staging.cck_basic_rates;
	rxon_assoc.reserved = 0;
	rxon_assoc.ofdm_ht_single_stream_basic_rates =
	    ctx->staging.ofdm_ht_single_stream_basic_rates;
	rxon_assoc.ofdm_ht_dual_stream_basic_rates =
	    ctx->staging.ofdm_ht_dual_stream_basic_rates;
	rxon_assoc.rx_chain_select_flags = ctx->staging.rx_chain;

1186
	ret = iwl_legacy_send_cmd_pdu_async(priv, REPLY_RXON_ASSOC,
1187 1188 1189 1190 1191 1192 1193 1194 1195 1196
				     sizeof(rxon_assoc), &rxon_assoc, NULL);
	if (ret)
		return ret;

	return ret;
}

static int iwl4965_commit_rxon(struct iwl_priv *priv, struct iwl_rxon_context *ctx)
{
	/* cast away the const for active_rxon in this function */
1197
	struct iwl_legacy_rxon_cmd *active_rxon = (void *)&ctx->active;
1198 1199 1200 1201
	int ret;
	bool new_assoc =
		!!(ctx->staging.filter_flags & RXON_FILTER_ASSOC_MSK);

1202
	if (!iwl_legacy_is_alive(priv))
1203 1204 1205 1206 1207 1208 1209 1210
		return -EBUSY;

	if (!ctx->is_active)
		return 0;

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

1211
	ret = iwl_legacy_check_rxon_cmd(priv, ctx);
1212 1213 1214 1215 1216 1217 1218 1219 1220
	if (ret) {
		IWL_ERR(priv, "Invalid RXON configuration.  Not committing.\n");
		return -EINVAL;
	}

	/*
	 * receive commit_rxon request
	 * abort any previous channel switch if still in process
	 */
1221 1222
	if (test_bit(STATUS_CHANNEL_SWITCH_PENDING, &priv->status) &&
	    (priv->switch_channel != ctx->staging.channel)) {
1223
		IWL_DEBUG_11H(priv, "abort channel switch on %d\n",
1224
		      le16_to_cpu(priv->switch_channel));
1225
		iwl_legacy_chswitch_done(priv, false);
1226 1227 1228 1229 1230
	}

	/* If we don't need to send a full RXON, we can use
	 * iwl_rxon_assoc_cmd which is used to reconfigure filter
	 * and other flags for the current radio configuration. */
1231 1232
	if (!iwl_legacy_full_rxon_required(priv, ctx)) {
		ret = iwl_legacy_send_rxon_assoc(priv, ctx);
1233 1234 1235 1236 1237 1238
		if (ret) {
			IWL_ERR(priv, "Error setting RXON_ASSOC (%d)\n", ret);
			return ret;
		}

		memcpy(active_rxon, &ctx->staging, sizeof(*active_rxon));
1239
		iwl_legacy_print_rx_config_cmd(priv, ctx);
1240
		goto set_tx_power;
1241 1242 1243 1244 1245 1246
	}

	/* If we are currently associated and the new config requires
	 * an RXON_ASSOC and the new config wants the associated mask enabled,
	 * we must clear the associated from the active configuration
	 * before we apply the new config */
1247
	if (iwl_legacy_is_associated_ctx(ctx) && new_assoc) {
1248 1249 1250
		IWL_DEBUG_INFO(priv, "Toggling associated bit on current RXON\n");
		active_rxon->filter_flags &= ~RXON_FILTER_ASSOC_MSK;

1251 1252
		ret = iwl_legacy_send_cmd_pdu(priv, ctx->rxon_cmd,
				       sizeof(struct iwl_legacy_rxon_cmd),
1253 1254 1255 1256 1257 1258 1259 1260 1261
				       active_rxon);

		/* If the mask clearing failed then we set
		 * active_rxon back to what it was previously */
		if (ret) {
			active_rxon->filter_flags |= RXON_FILTER_ASSOC_MSK;
			IWL_ERR(priv, "Error clearing ASSOC_MSK (%d)\n", ret);
			return ret;
		}
1262 1263 1264
		iwl_legacy_clear_ucode_stations(priv, ctx);
		iwl_legacy_restore_stations(priv, ctx);
		ret = iwl4965_restore_default_wep_keys(priv, ctx);
1265 1266 1267 1268 1269 1270 1271 1272 1273 1274 1275 1276 1277 1278
		if (ret) {
			IWL_ERR(priv, "Failed to restore WEP keys (%d)\n", ret);
			return ret;
		}
	}

	IWL_DEBUG_INFO(priv, "Sending RXON\n"
		       "* with%s RXON_FILTER_ASSOC_MSK\n"
		       "* channel = %d\n"
		       "* bssid = %pM\n",
		       (new_assoc ? "" : "out"),
		       le16_to_cpu(ctx->staging.channel),
		       ctx->staging.bssid_addr);

1279 1280
	iwl_legacy_set_rxon_hwcrypto(priv, ctx,
				!priv->cfg->mod_params->sw_crypto);
1281 1282 1283 1284 1285 1286

	/* Apply the new configuration
	 * RXON unassoc clears the station table in uCode so restoration of
	 * stations is needed after it (the RXON command) completes
	 */
	if (!new_assoc) {
1287 1288
		ret = iwl_legacy_send_cmd_pdu(priv, ctx->rxon_cmd,
			      sizeof(struct iwl_legacy_rxon_cmd), &ctx->staging);
1289 1290 1291 1292 1293 1294
		if (ret) {
			IWL_ERR(priv, "Error setting new RXON (%d)\n", ret);
			return ret;
		}
		IWL_DEBUG_INFO(priv, "Return from !new_assoc RXON.\n");
		memcpy(active_rxon, &ctx->staging, sizeof(*active_rxon));
1295 1296 1297
		iwl_legacy_clear_ucode_stations(priv, ctx);
		iwl_legacy_restore_stations(priv, ctx);
		ret = iwl4965_restore_default_wep_keys(priv, ctx);
1298 1299 1300 1301 1302 1303 1304 1305 1306 1307
		if (ret) {
			IWL_ERR(priv, "Failed to restore WEP keys (%d)\n", ret);
			return ret;
		}
	}
	if (new_assoc) {
		priv->start_calib = 0;
		/* Apply the new configuration
		 * RXON assoc doesn't clear the station table in uCode,
		 */
1308 1309
		ret = iwl_legacy_send_cmd_pdu(priv, ctx->rxon_cmd,
			      sizeof(struct iwl_legacy_rxon_cmd), &ctx->staging);
1310 1311 1312 1313 1314 1315
		if (ret) {
			IWL_ERR(priv, "Error setting new RXON (%d)\n", ret);
			return ret;
		}
		memcpy(active_rxon, &ctx->staging, sizeof(*active_rxon));
	}
1316
	iwl_legacy_print_rx_config_cmd(priv, ctx);
1317

1318
	iwl4965_init_sensitivity(priv);
1319

1320
set_tx_power:
1321 1322
	/* If we issue a new RXON command which required a tune then we must
	 * send a new TXPOWER command or we won't be able to Tx any frames */
1323
	ret = iwl_legacy_set_tx_power(priv, priv->tx_power_next, true);
1324 1325 1326 1327 1328 1329 1330 1331 1332 1333 1334 1335 1336 1337 1338 1339 1340 1341 1342 1343 1344 1345 1346 1347 1348 1349
	if (ret) {
		IWL_ERR(priv, "Error sending TX power (%d)\n", ret);
		return ret;
	}

	return 0;
}

static int iwl4965_hw_channel_switch(struct iwl_priv *priv,
				     struct ieee80211_channel_switch *ch_switch)
{
	struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
	int rc;
	u8 band = 0;
	bool is_ht40 = false;
	u8 ctrl_chan_high = 0;
	struct iwl4965_channel_switch_cmd cmd;
	const struct iwl_channel_info *ch_info;
	u32 switch_time_in_usec, ucode_switch_time;
	u16 ch;
	u32 tsf_low;
	u8 switch_count;
	u16 beacon_interval = le16_to_cpu(ctx->timing.beacon_interval);
	struct ieee80211_vif *vif = ctx->vif;
	band = priv->band == IEEE80211_BAND_2GHZ;

1350
	is_ht40 = iw4965_is_ht40_channel(ctx->staging.flags);
1351 1352 1353 1354 1355 1356 1357 1358 1359 1360 1361 1362 1363 1364 1365 1366 1367 1368 1369 1370 1371 1372 1373 1374 1375 1376 1377 1378 1379 1380

	if (is_ht40 &&
	    (ctx->staging.flags & RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK))
		ctrl_chan_high = 1;

	cmd.band = band;
	cmd.expect_beacon = 0;
	ch = ch_switch->channel->hw_value;
	cmd.channel = cpu_to_le16(ch);
	cmd.rxon_flags = ctx->staging.flags;
	cmd.rxon_filter_flags = ctx->staging.filter_flags;
	switch_count = ch_switch->count;
	tsf_low = ch_switch->timestamp & 0x0ffffffff;
	/*
	 * calculate the ucode channel switch time
	 * adding TSF as one of the factor for when to switch
	 */
	if ((priv->ucode_beacon_time > tsf_low) && beacon_interval) {
		if (switch_count > ((priv->ucode_beacon_time - tsf_low) /
		    beacon_interval)) {
			switch_count -= (priv->ucode_beacon_time -
				tsf_low) / beacon_interval;
		} else
			switch_count = 0;
	}
	if (switch_count <= 1)
		cmd.switch_time = cpu_to_le32(priv->ucode_beacon_time);
	else {
		switch_time_in_usec =
			vif->bss_conf.beacon_int * switch_count * TIME_UNIT;
1381
		ucode_switch_time = iwl_legacy_usecs_to_beacons(priv,
1382 1383
							 switch_time_in_usec,
							 beacon_interval);
1384
		cmd.switch_time = iwl_legacy_add_beacon_time(priv,
1385 1386 1387 1388 1389 1390
						      priv->ucode_beacon_time,
						      ucode_switch_time,
						      beacon_interval);
	}
	IWL_DEBUG_11H(priv, "uCode time for the switch is 0x%x\n",
		      cmd.switch_time);
1391
	ch_info = iwl_legacy_get_channel_info(priv, priv->band, ch);
1392
	if (ch_info)
1393
		cmd.expect_beacon = iwl_legacy_is_channel_radar(ch_info);
1394 1395 1396 1397 1398 1399 1400 1401 1402 1403 1404 1405 1406
	else {
		IWL_ERR(priv, "invalid channel switch from %u to %u\n",
			ctx->active.channel, ch);
		return -EFAULT;
	}

	rc = iwl4965_fill_txpower_tbl(priv, band, ch, is_ht40,
				      ctrl_chan_high, &cmd.tx_power);
	if (rc) {
		IWL_DEBUG_11H(priv, "error:%d  fill txpower_tbl\n", rc);
		return rc;
	}

1407 1408
	return iwl_legacy_send_cmd_pdu(priv,
			 REPLY_CHANNEL_SWITCH, sizeof(cmd), &cmd);
1409 1410 1411 1412 1413 1414 1415 1416 1417 1418 1419 1420 1421 1422 1423 1424 1425 1426 1427 1428 1429 1430 1431 1432 1433 1434 1435 1436 1437 1438 1439 1440 1441 1442 1443 1444 1445 1446 1447 1448 1449
}

/**
 * iwl4965_txq_update_byte_cnt_tbl - Set up entry in Tx byte-count array
 */
static void iwl4965_txq_update_byte_cnt_tbl(struct iwl_priv *priv,
					    struct iwl_tx_queue *txq,
					    u16 byte_cnt)
{
	struct iwl4965_scd_bc_tbl *scd_bc_tbl = priv->scd_bc_tbls.addr;
	int txq_id = txq->q.id;
	int write_ptr = txq->q.write_ptr;
	int len = byte_cnt + IWL_TX_CRC_SIZE + IWL_TX_DELIMITER_SIZE;
	__le16 bc_ent;

	WARN_ON(len > 0xFFF || write_ptr >= TFD_QUEUE_SIZE_MAX);

	bc_ent = cpu_to_le16(len & 0xFFF);
	/* Set up byte count within first 256 entries */
	scd_bc_tbl[txq_id].tfd_offset[write_ptr] = bc_ent;

	/* If within first 64 entries, duplicate at end */
	if (write_ptr < TFD_QUEUE_SIZE_BC_DUP)
		scd_bc_tbl[txq_id].
			tfd_offset[TFD_QUEUE_SIZE_MAX + write_ptr] = bc_ent;
}

/**
 * iwl4965_hw_get_temperature - return the calibrated temperature (in Kelvin)
 * @statistics: Provides the temperature reading from the uCode
 *
 * A return of <0 indicates bogus data in the statistics
 */
static int iwl4965_hw_get_temperature(struct iwl_priv *priv)
{
	s32 temperature;
	s32 vt;
	s32 R1, R2, R3;
	u32 R4;

	if (test_bit(STATUS_TEMPERATURE, &priv->status) &&
1450
	    (priv->_4965.statistics.flag &
1451 1452 1453 1454 1455 1456 1457 1458 1459 1460 1461 1462 1463 1464 1465 1466 1467 1468 1469 1470 1471 1472 1473 1474
			STATISTICS_REPLY_FLG_HT40_MODE_MSK)) {
		IWL_DEBUG_TEMP(priv, "Running HT40 temperature calibration\n");
		R1 = (s32)le32_to_cpu(priv->card_alive_init.therm_r1[1]);
		R2 = (s32)le32_to_cpu(priv->card_alive_init.therm_r2[1]);
		R3 = (s32)le32_to_cpu(priv->card_alive_init.therm_r3[1]);
		R4 = le32_to_cpu(priv->card_alive_init.therm_r4[1]);
	} else {
		IWL_DEBUG_TEMP(priv, "Running temperature calibration\n");
		R1 = (s32)le32_to_cpu(priv->card_alive_init.therm_r1[0]);
		R2 = (s32)le32_to_cpu(priv->card_alive_init.therm_r2[0]);
		R3 = (s32)le32_to_cpu(priv->card_alive_init.therm_r3[0]);
		R4 = le32_to_cpu(priv->card_alive_init.therm_r4[0]);
	}

	/*
	 * Temperature is only 23 bits, so sign extend out to 32.
	 *
	 * NOTE If we haven't received a statistics notification yet
	 * with an updated temperature, use R4 provided to us in the
	 * "initialize" ALIVE response.
	 */
	if (!test_bit(STATUS_TEMPERATURE, &priv->status))
		vt = sign_extend32(R4, 23);
	else
1475
		vt = sign_extend32(le32_to_cpu(priv->_4965.statistics.
1476 1477 1478 1479 1480 1481 1482 1483 1484 1485 1486 1487 1488 1489 1490 1491 1492 1493 1494 1495 1496 1497 1498 1499 1500 1501 1502 1503 1504 1505 1506 1507 1508 1509 1510 1511 1512 1513 1514 1515 1516 1517 1518 1519 1520 1521 1522 1523 1524 1525 1526 1527 1528 1529 1530 1531 1532 1533 1534 1535 1536 1537 1538 1539 1540 1541 1542 1543
				 general.common.temperature), 23);

	IWL_DEBUG_TEMP(priv, "Calib values R[1-3]: %d %d %d R4: %d\n", R1, R2, R3, vt);

	if (R3 == R1) {
		IWL_ERR(priv, "Calibration conflict R1 == R3\n");
		return -1;
	}

	/* Calculate temperature in degrees Kelvin, adjust by 97%.
	 * Add offset to center the adjustment around 0 degrees Centigrade. */
	temperature = TEMPERATURE_CALIB_A_VAL * (vt - R2);
	temperature /= (R3 - R1);
	temperature = (temperature * 97) / 100 + TEMPERATURE_CALIB_KELVIN_OFFSET;

	IWL_DEBUG_TEMP(priv, "Calibrated temperature: %dK, %dC\n",
			temperature, KELVIN_TO_CELSIUS(temperature));

	return temperature;
}

/* Adjust Txpower only if temperature variance is greater than threshold. */
#define IWL_TEMPERATURE_THRESHOLD   3

/**
 * iwl4965_is_temp_calib_needed - determines if new calibration is needed
 *
 * If the temperature changed has changed sufficiently, then a recalibration
 * is needed.
 *
 * Assumes caller will replace priv->last_temperature once calibration
 * executed.
 */
static int iwl4965_is_temp_calib_needed(struct iwl_priv *priv)
{
	int temp_diff;

	if (!test_bit(STATUS_STATISTICS, &priv->status)) {
		IWL_DEBUG_TEMP(priv, "Temperature not updated -- no statistics.\n");
		return 0;
	}

	temp_diff = priv->temperature - priv->last_temperature;

	/* get absolute value */
	if (temp_diff < 0) {
		IWL_DEBUG_POWER(priv, "Getting cooler, delta %d\n", temp_diff);
		temp_diff = -temp_diff;
	} else if (temp_diff == 0)
		IWL_DEBUG_POWER(priv, "Temperature unchanged\n");
	else
		IWL_DEBUG_POWER(priv, "Getting warmer, delta %d\n", temp_diff);

	if (temp_diff < IWL_TEMPERATURE_THRESHOLD) {
		IWL_DEBUG_POWER(priv, " => thermal txpower calib not needed\n");
		return 0;
	}

	IWL_DEBUG_POWER(priv, " => thermal txpower calib needed\n");

	return 1;
}

static void iwl4965_temperature_calib(struct iwl_priv *priv)
{
	s32 temp;

	temp = iwl4965_hw_get_temperature(priv);
1544
	if (IWL_TX_POWER_TEMPERATURE_OUT_OF_RANGE(temp))
1545 1546 1547 1548 1549 1550 1551 1552 1553 1554 1555 1556 1557 1558 1559 1560 1561 1562 1563 1564 1565 1566 1567 1568 1569 1570 1571 1572 1573 1574 1575 1576 1577
		return;

	if (priv->temperature != temp) {
		if (priv->temperature)
			IWL_DEBUG_TEMP(priv, "Temperature changed "
				       "from %dC to %dC\n",
				       KELVIN_TO_CELSIUS(priv->temperature),
				       KELVIN_TO_CELSIUS(temp));
		else
			IWL_DEBUG_TEMP(priv, "Temperature "
				       "initialized to %dC\n",
				       KELVIN_TO_CELSIUS(temp));
	}

	priv->temperature = temp;
	set_bit(STATUS_TEMPERATURE, &priv->status);

	if (!priv->disable_tx_power_cal &&
	     unlikely(!test_bit(STATUS_SCANNING, &priv->status)) &&
	     iwl4965_is_temp_calib_needed(priv))
		queue_work(priv->workqueue, &priv->txpower_work);
}

static u16 iwl4965_get_hcmd_size(u8 cmd_id, u16 len)
{
	switch (cmd_id) {
	case REPLY_RXON:
		return (u16) sizeof(struct iwl4965_rxon_cmd);
	default:
		return len;
	}
}

1578 1579
static u16 iwl4965_build_addsta_hcmd(const struct iwl_legacy_addsta_cmd *cmd,
								u8 *data)
1580 1581 1582 1583 1584 1585 1586 1587 1588 1589 1590 1591 1592 1593 1594 1595 1596 1597 1598 1599 1600 1601 1602 1603 1604 1605 1606 1607 1608 1609 1610 1611 1612 1613 1614 1615 1616 1617 1618 1619 1620 1621 1622 1623 1624 1625 1626 1627 1628 1629 1630 1631 1632 1633 1634 1635 1636 1637
{
	struct iwl4965_addsta_cmd *addsta = (struct iwl4965_addsta_cmd *)data;
	addsta->mode = cmd->mode;
	memcpy(&addsta->sta, &cmd->sta, sizeof(struct sta_id_modify));
	memcpy(&addsta->key, &cmd->key, sizeof(struct iwl4965_keyinfo));
	addsta->station_flags = cmd->station_flags;
	addsta->station_flags_msk = cmd->station_flags_msk;
	addsta->tid_disable_tx = cmd->tid_disable_tx;
	addsta->add_immediate_ba_tid = cmd->add_immediate_ba_tid;
	addsta->remove_immediate_ba_tid = cmd->remove_immediate_ba_tid;
	addsta->add_immediate_ba_ssn = cmd->add_immediate_ba_ssn;
	addsta->sleep_tx_count = cmd->sleep_tx_count;
	addsta->reserved1 = cpu_to_le16(0);
	addsta->reserved2 = cpu_to_le16(0);

	return (u16)sizeof(struct iwl4965_addsta_cmd);
}

static inline u32 iwl4965_get_scd_ssn(struct iwl4965_tx_resp *tx_resp)
{
	return le32_to_cpup(&tx_resp->u.status + tx_resp->frame_count) & MAX_SN;
}

/**
 * iwl4965_tx_status_reply_tx - Handle Tx response for frames in aggregation queue
 */
static int iwl4965_tx_status_reply_tx(struct iwl_priv *priv,
				      struct iwl_ht_agg *agg,
				      struct iwl4965_tx_resp *tx_resp,
				      int txq_id, u16 start_idx)
{
	u16 status;
	struct agg_tx_status *frame_status = tx_resp->u.agg_status;
	struct ieee80211_tx_info *info = NULL;
	struct ieee80211_hdr *hdr = NULL;
	u32 rate_n_flags = le32_to_cpu(tx_resp->rate_n_flags);
	int i, sh, idx;
	u16 seq;
	if (agg->wait_for_ba)
		IWL_DEBUG_TX_REPLY(priv, "got tx response w/o block-ack\n");

	agg->frame_count = tx_resp->frame_count;
	agg->start_idx = start_idx;
	agg->rate_n_flags = rate_n_flags;
	agg->bitmap = 0;

	/* num frames attempted by Tx command */
	if (agg->frame_count == 1) {
		/* Only one frame was attempted; no block-ack will arrive */
		status = le16_to_cpu(frame_status[0].status);
		idx = start_idx;

		IWL_DEBUG_TX_REPLY(priv, "FrameCnt = %d, StartIdx=%d idx=%d\n",
				   agg->frame_count, agg->start_idx, idx);

		info = IEEE80211_SKB_CB(priv->txq[txq_id].txb[idx].skb);
		info->status.rates[0].count = tx_resp->failure_frame + 1;
		info->flags &= ~IEEE80211_TX_CTL_AMPDU;
1638 1639
		info->flags |= iwl4965_tx_status_to_mac80211(status);
		iwl4965_hwrate_to_tx_control(priv, rate_n_flags, info);
1640 1641 1642 1643 1644 1645 1646 1647 1648 1649 1650 1651 1652 1653 1654 1655 1656 1657 1658 1659 1660 1661 1662 1663 1664 1665

		IWL_DEBUG_TX_REPLY(priv, "1 Frame 0x%x failure :%d\n",
				    status & 0xff, tx_resp->failure_frame);
		IWL_DEBUG_TX_REPLY(priv, "Rate Info rate_n_flags=%x\n", rate_n_flags);

		agg->wait_for_ba = 0;
	} else {
		/* Two or more frames were attempted; expect block-ack */
		u64 bitmap = 0;
		int start = agg->start_idx;

		/* Construct bit-map of pending frames within Tx window */
		for (i = 0; i < agg->frame_count; i++) {
			u16 sc;
			status = le16_to_cpu(frame_status[i].status);
			seq  = le16_to_cpu(frame_status[i].sequence);
			idx = SEQ_TO_INDEX(seq);
			txq_id = SEQ_TO_QUEUE(seq);

			if (status & (AGG_TX_STATE_FEW_BYTES_MSK |
				      AGG_TX_STATE_ABORT_MSK))
				continue;

			IWL_DEBUG_TX_REPLY(priv, "FrameCnt = %d, txq_id=%d idx=%d\n",
					   agg->frame_count, txq_id, idx);

1666
			hdr = iwl_legacy_tx_queue_get_hdr(priv, txq_id, idx);
1667 1668 1669 1670 1671 1672 1673 1674 1675 1676 1677 1678 1679 1680 1681 1682 1683 1684 1685 1686 1687 1688 1689 1690 1691 1692 1693 1694 1695 1696 1697 1698 1699 1700 1701 1702 1703 1704 1705 1706 1707 1708 1709 1710 1711 1712 1713 1714 1715 1716
			if (!hdr) {
				IWL_ERR(priv,
					"BUG_ON idx doesn't point to valid skb"
					" idx=%d, txq_id=%d\n", idx, txq_id);
				return -1;
			}

			sc = le16_to_cpu(hdr->seq_ctrl);
			if (idx != (SEQ_TO_SN(sc) & 0xff)) {
				IWL_ERR(priv,
					"BUG_ON idx doesn't match seq control"
					" idx=%d, seq_idx=%d, seq=%d\n",
					idx, SEQ_TO_SN(sc), hdr->seq_ctrl);
				return -1;
			}

			IWL_DEBUG_TX_REPLY(priv, "AGG Frame i=%d idx %d seq=%d\n",
					   i, idx, SEQ_TO_SN(sc));

			sh = idx - start;
			if (sh > 64) {
				sh = (start - idx) + 0xff;
				bitmap = bitmap << sh;
				sh = 0;
				start = idx;
			} else if (sh < -64)
				sh  = 0xff - (start - idx);
			else if (sh < 0) {
				sh = start - idx;
				start = idx;
				bitmap = bitmap << sh;
				sh = 0;
			}
			bitmap |= 1ULL << sh;
			IWL_DEBUG_TX_REPLY(priv, "start=%d bitmap=0x%llx\n",
					   start, (unsigned long long)bitmap);
		}

		agg->bitmap = bitmap;
		agg->start_idx = start;
		IWL_DEBUG_TX_REPLY(priv, "Frames %d start_idx=%d bitmap=0x%llx\n",
				   agg->frame_count, agg->start_idx,
				   (unsigned long long)agg->bitmap);

		if (bitmap)
			agg->wait_for_ba = 1;
	}
	return 0;
}

1717
static u8 iwl4965_find_station(struct iwl_priv *priv, const u8 *addr)
1718 1719 1720 1721 1722 1723
{
	int i;
	int start = 0;
	int ret = IWL_INVALID_STATION;
	unsigned long flags;

1724
	if ((priv->iw_mode == NL80211_IFTYPE_ADHOC))
1725 1726 1727 1728 1729 1730 1731 1732 1733 1734 1735 1736 1737 1738 1739 1740 1741 1742 1743 1744 1745 1746 1747 1748 1749 1750 1751 1752 1753 1754 1755 1756 1757 1758 1759
		start = IWL_STA_ID;

	if (is_broadcast_ether_addr(addr))
		return priv->contexts[IWL_RXON_CTX_BSS].bcast_sta_id;

	spin_lock_irqsave(&priv->sta_lock, flags);
	for (i = start; i < priv->hw_params.max_stations; i++)
		if (priv->stations[i].used &&
		    (!compare_ether_addr(priv->stations[i].sta.sta.addr,
					 addr))) {
			ret = i;
			goto out;
		}

	IWL_DEBUG_ASSOC_LIMIT(priv, "can not find STA %pM total %d\n",
			      addr, priv->num_stations);

 out:
	/*
	 * It may be possible that more commands interacting with stations
	 * arrive before we completed processing the adding of
	 * station
	 */
	if (ret != IWL_INVALID_STATION &&
	    (!(priv->stations[ret].used & IWL_STA_UCODE_ACTIVE) ||
	     ((priv->stations[ret].used & IWL_STA_UCODE_ACTIVE) &&
	      (priv->stations[ret].used & IWL_STA_UCODE_INPROGRESS)))) {
		IWL_ERR(priv, "Requested station info for sta %d before ready.\n",
			ret);
		ret = IWL_INVALID_STATION;
	}
	spin_unlock_irqrestore(&priv->sta_lock, flags);
	return ret;
}

1760
static int iwl4965_get_ra_sta_id(struct iwl_priv *priv, struct ieee80211_hdr *hdr)
1761 1762 1763 1764 1765
{
	if (priv->iw_mode == NL80211_IFTYPE_STATION) {
		return IWL_AP_ID;
	} else {
		u8 *da = ieee80211_get_DA(hdr);
1766
		return iwl4965_find_station(priv, da);
1767 1768 1769 1770 1771 1772 1773 1774 1775 1776 1777 1778 1779 1780 1781 1782 1783 1784 1785 1786 1787 1788 1789 1790
	}
}

/**
 * iwl4965_rx_reply_tx - Handle standard (non-aggregation) Tx response
 */
static void iwl4965_rx_reply_tx(struct iwl_priv *priv,
				struct iwl_rx_mem_buffer *rxb)
{
	struct iwl_rx_packet *pkt = rxb_addr(rxb);
	u16 sequence = le16_to_cpu(pkt->hdr.sequence);
	int txq_id = SEQ_TO_QUEUE(sequence);
	int index = SEQ_TO_INDEX(sequence);
	struct iwl_tx_queue *txq = &priv->txq[txq_id];
	struct ieee80211_hdr *hdr;
	struct ieee80211_tx_info *info;
	struct iwl4965_tx_resp *tx_resp = (void *)&pkt->u.raw[0];
	u32  status = le32_to_cpu(tx_resp->u.status);
	int uninitialized_var(tid);
	int sta_id;
	int freed;
	u8 *qc = NULL;
	unsigned long flags;

1791
	if ((index >= txq->q.n_bd) || (iwl_legacy_queue_used(&txq->q, index) == 0)) {
1792 1793 1794 1795 1796 1797 1798 1799 1800 1801 1802
		IWL_ERR(priv, "Read index for DMA queue txq_id (%d) index %d "
			  "is out of range [0-%d] %d %d\n", txq_id,
			  index, txq->q.n_bd, txq->q.write_ptr,
			  txq->q.read_ptr);
		return;
	}

	txq->time_stamp = jiffies;
	info = IEEE80211_SKB_CB(txq->txb[txq->q.read_ptr].skb);
	memset(&info->status, 0, sizeof(info->status));

1803
	hdr = iwl_legacy_tx_queue_get_hdr(priv, txq_id, index);
1804 1805 1806 1807 1808
	if (ieee80211_is_data_qos(hdr->frame_control)) {
		qc = ieee80211_get_qos_ctl(hdr);
		tid = qc[0] & 0xf;
	}

1809
	sta_id = iwl4965_get_ra_sta_id(priv, hdr);
1810 1811 1812 1813 1814 1815 1816 1817 1818 1819 1820 1821 1822 1823 1824 1825
	if (txq->sched_retry && unlikely(sta_id == IWL_INVALID_STATION)) {
		IWL_ERR(priv, "Station not known\n");
		return;
	}

	spin_lock_irqsave(&priv->sta_lock, flags);
	if (txq->sched_retry) {
		const u32 scd_ssn = iwl4965_get_scd_ssn(tx_resp);
		struct iwl_ht_agg *agg = NULL;
		WARN_ON(!qc);

		agg = &priv->stations[sta_id].tid[tid].agg;

		iwl4965_tx_status_reply_tx(priv, agg, tx_resp, txq_id, index);

		/* check if BAR is needed */
1826
		if ((tx_resp->frame_count == 1) && !iwl4965_is_tx_success(status))
1827 1828 1829
			info->flags |= IEEE80211_TX_STAT_AMPDU_NO_BACK;

		if (txq->q.read_ptr != (scd_ssn & 0xff)) {
1830 1831
			index = iwl_legacy_queue_dec_wrap(scd_ssn & 0xff,
								txq->q.n_bd);
1832 1833
			IWL_DEBUG_TX_REPLY(priv, "Retry scheduler reclaim scd_ssn "
					   "%d index %d\n", scd_ssn , index);
1834
			freed = iwl4965_tx_queue_reclaim(priv, txq_id, index);
1835
			if (qc)
1836
				iwl4965_free_tfds_in_queue(priv, sta_id,
1837 1838 1839
						       tid, freed);

			if (priv->mac80211_registered &&
1840 1841 1842
			    (iwl_legacy_queue_space(&txq->q) > txq->q.low_mark)
				 && (agg->state != IWL_EMPTYING_HW_QUEUE_DELBA))
				iwl_legacy_wake_queue(priv, txq);
1843 1844 1845
		}
	} else {
		info->status.rates[0].count = tx_resp->failure_frame + 1;
1846 1847
		info->flags |= iwl4965_tx_status_to_mac80211(status);
		iwl4965_hwrate_to_tx_control(priv,
1848 1849 1850 1851 1852 1853
					le32_to_cpu(tx_resp->rate_n_flags),
					info);

		IWL_DEBUG_TX_REPLY(priv, "TXQ %d status %s (0x%08x) "
				   "rate_n_flags 0x%x retries %d\n",
				   txq_id,
1854
				   iwl4965_get_tx_fail_reason(status), status,
1855 1856 1857
				   le32_to_cpu(tx_resp->rate_n_flags),
				   tx_resp->failure_frame);

1858
		freed = iwl4965_tx_queue_reclaim(priv, txq_id, index);
1859
		if (qc && likely(sta_id != IWL_INVALID_STATION))
1860
			iwl4965_free_tfds_in_queue(priv, sta_id, tid, freed);
1861 1862 1863 1864
		else if (sta_id == IWL_INVALID_STATION)
			IWL_DEBUG_TX_REPLY(priv, "Station not known\n");

		if (priv->mac80211_registered &&
1865 1866
		    (iwl_legacy_queue_space(&txq->q) > txq->q.low_mark))
			iwl_legacy_wake_queue(priv, txq);
1867 1868
	}
	if (qc && likely(sta_id != IWL_INVALID_STATION))
1869
		iwl4965_txq_check_empty(priv, sta_id, tid, txq_id);
1870

1871
	iwl4965_check_abort_status(priv, tx_resp->frame_count, status);
1872 1873 1874 1875 1876 1877 1878 1879 1880

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

static void iwl4965_rx_beacon_notif(struct iwl_priv *priv,
				    struct iwl_rx_mem_buffer *rxb)
{
	struct iwl_rx_packet *pkt = rxb_addr(rxb);
	struct iwl4965_beacon_notif *beacon = (void *)pkt->u.raw;
1881 1882
	u8 rate __maybe_unused =
		iwl4965_hw_get_rate(beacon->beacon_notify_hdr.rate_n_flags);
1883 1884 1885 1886 1887 1888 1889 1890 1891 1892 1893 1894 1895 1896 1897 1898

	IWL_DEBUG_RX(priv, "beacon status %#x, retries:%d ibssmgr:%d "
		"tsf:0x%.8x%.8x rate:%d\n",
		le32_to_cpu(beacon->beacon_notify_hdr.u.status) & TX_STATUS_MSK,
		beacon->beacon_notify_hdr.failure_frame,
		le32_to_cpu(beacon->ibss_mgr_status),
		le32_to_cpu(beacon->high_tsf),
		le32_to_cpu(beacon->low_tsf), rate);

	priv->ibss_manager = le32_to_cpu(beacon->ibss_mgr_status);
}

/* Set up 4965-specific Rx frame reply handlers */
static void iwl4965_rx_handler_setup(struct iwl_priv *priv)
{
	/* Legacy Rx frames */
1899
	priv->rx_handlers[REPLY_RX] = iwl4965_rx_reply_rx;
1900 1901 1902 1903 1904 1905 1906 1907
	/* Tx response */
	priv->rx_handlers[REPLY_TX] = iwl4965_rx_reply_tx;
	priv->rx_handlers[BEACON_NOTIFICATION] = iwl4965_rx_beacon_notif;
}

static struct iwl_hcmd_ops iwl4965_hcmd = {
	.rxon_assoc = iwl4965_send_rxon_assoc,
	.commit_rxon = iwl4965_commit_rxon,
1908
	.set_rxon_chain = iwl4965_set_rxon_chain,
1909 1910 1911 1912 1913 1914 1915 1916 1917 1918 1919
};

static void iwl4965_post_scan(struct iwl_priv *priv)
{
	struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];

	/*
	 * Since setting the RXON may have been deferred while
	 * performing the scan, fire one off if needed
	 */
	if (memcmp(&ctx->staging, &ctx->active, sizeof(ctx->staging)))
1920
		iwl_legacy_commit_rxon(priv, ctx);
1921 1922 1923 1924 1925 1926 1927 1928 1929 1930 1931 1932 1933 1934 1935
}

static void iwl4965_post_associate(struct iwl_priv *priv)
{
	struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
	struct ieee80211_vif *vif = ctx->vif;
	struct ieee80211_conf *conf = NULL;
	int ret = 0;

	if (!vif || !priv->is_open)
		return;

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

1936
	iwl_legacy_scan_cancel_timeout(priv, 200);
1937

1938
	conf = iwl_legacy_ieee80211_get_hw_conf(priv->hw);
1939 1940

	ctx->staging.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
1941
	iwl_legacy_commit_rxon(priv, ctx);
1942

1943
	ret = iwl_legacy_send_rxon_timing(priv, ctx);
1944 1945 1946 1947 1948 1949
	if (ret)
		IWL_WARN(priv, "RXON timing - "
			    "Attempting to continue.\n");

	ctx->staging.filter_flags |= RXON_FILTER_ASSOC_MSK;

1950
	iwl_legacy_set_rxon_ht(priv, &priv->current_ht_config);
1951 1952 1953 1954 1955 1956 1957 1958 1959 1960 1961 1962 1963 1964 1965 1966 1967 1968 1969 1970 1971

	if (priv->cfg->ops->hcmd->set_rxon_chain)
		priv->cfg->ops->hcmd->set_rxon_chain(priv, ctx);

	ctx->staging.assoc_id = cpu_to_le16(vif->bss_conf.aid);

	IWL_DEBUG_ASSOC(priv, "assoc id %d beacon interval %d\n",
			vif->bss_conf.aid, vif->bss_conf.beacon_int);

	if (vif->bss_conf.use_short_preamble)
		ctx->staging.flags |= RXON_FLG_SHORT_PREAMBLE_MSK;
	else
		ctx->staging.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK;

	if (ctx->staging.flags & RXON_FLG_BAND_24G_MSK) {
		if (vif->bss_conf.use_short_slot)
			ctx->staging.flags |= RXON_FLG_SHORT_SLOT_MSK;
		else
			ctx->staging.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
	}

1972
	iwl_legacy_commit_rxon(priv, ctx);
1973 1974 1975 1976 1977 1978 1979 1980

	IWL_DEBUG_ASSOC(priv, "Associated as %d to: %pM\n",
			vif->bss_conf.aid, ctx->active.bssid_addr);

	switch (vif->type) {
	case NL80211_IFTYPE_STATION:
		break;
	case NL80211_IFTYPE_ADHOC:
1981
		iwl4965_send_beacon_cmd(priv);
1982 1983 1984 1985 1986 1987 1988 1989 1990 1991 1992
		break;
	default:
		IWL_ERR(priv, "%s Should not be called in %d mode\n",
			  __func__, vif->type);
		break;
	}

	/* the chain noise calibration will enabled PM upon completion
	 * If chain noise has already been run, then we need to enable
	 * power management here */
	if (priv->chain_noise_data.state == IWL_CHAIN_NOISE_DONE)
1993
		iwl_legacy_power_update_mode(priv, false);
1994 1995

	/* Enable Rx differential gain and sensitivity calibrations */
1996
	iwl4965_chain_noise_reset(priv);
1997 1998 1999 2000 2001 2002 2003 2004 2005 2006 2007 2008 2009 2010 2011
	priv->start_calib = 1;
}

static void iwl4965_config_ap(struct iwl_priv *priv)
{
	struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
	struct ieee80211_vif *vif = ctx->vif;
	int ret = 0;

	lockdep_assert_held(&priv->mutex);

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

	/* The following should be done only at AP bring up */
2012
	if (!iwl_legacy_is_associated_ctx(ctx)) {
2013 2014 2015

		/* RXON - unassoc (to set timing command) */
		ctx->staging.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
2016
		iwl_legacy_commit_rxon(priv, ctx);
2017 2018

		/* RXON Timing */
2019
		ret = iwl_legacy_send_rxon_timing(priv, ctx);
2020 2021 2022 2023 2024 2025 2026
		if (ret)
			IWL_WARN(priv, "RXON timing failed - "
					"Attempting to continue.\n");

		/* AP has all antennas */
		priv->chain_noise_data.active_chains =
			priv->hw_params.valid_rx_ant;
2027
		iwl_legacy_set_rxon_ht(priv, &priv->current_ht_config);
2028 2029 2030 2031 2032 2033 2034 2035 2036 2037 2038 2039 2040 2041 2042 2043 2044 2045 2046 2047 2048
		if (priv->cfg->ops->hcmd->set_rxon_chain)
			priv->cfg->ops->hcmd->set_rxon_chain(priv, ctx);

		ctx->staging.assoc_id = 0;

		if (vif->bss_conf.use_short_preamble)
			ctx->staging.flags |=
				RXON_FLG_SHORT_PREAMBLE_MSK;
		else
			ctx->staging.flags &=
				~RXON_FLG_SHORT_PREAMBLE_MSK;

		if (ctx->staging.flags & RXON_FLG_BAND_24G_MSK) {
			if (vif->bss_conf.use_short_slot)
				ctx->staging.flags |=
					RXON_FLG_SHORT_SLOT_MSK;
			else
				ctx->staging.flags &=
					~RXON_FLG_SHORT_SLOT_MSK;
		}
		/* need to send beacon cmd before committing assoc RXON! */
2049
		iwl4965_send_beacon_cmd(priv);
2050 2051
		/* restore RXON assoc */
		ctx->staging.filter_flags |= RXON_FILTER_ASSOC_MSK;
2052
		iwl_legacy_commit_rxon(priv, ctx);
2053
	}
2054
	iwl4965_send_beacon_cmd(priv);
2055 2056 2057 2058 2059
}

static struct iwl_hcmd_utils_ops iwl4965_hcmd_utils = {
	.get_hcmd_size = iwl4965_get_hcmd_size,
	.build_addsta_hcmd = iwl4965_build_addsta_hcmd,
2060
	.request_scan = iwl4965_request_scan,
2061 2062 2063 2064 2065 2066
	.post_scan = iwl4965_post_scan,
};

static struct iwl_lib_ops iwl4965_lib = {
	.set_hw_params = iwl4965_hw_set_hw_params,
	.txq_update_byte_cnt_tbl = iwl4965_txq_update_byte_cnt_tbl,
2067 2068 2069
	.txq_attach_buf_to_tfd = iwl4965_hw_txq_attach_buf_to_tfd,
	.txq_free_tfd = iwl4965_hw_txq_free_tfd,
	.txq_init = iwl4965_hw_tx_queue_init,
2070 2071 2072 2073
	.rx_handler_setup = iwl4965_rx_handler_setup,
	.is_valid_rtc_data_addr = iwl4965_hw_valid_rtc_data_addr,
	.init_alive_start = iwl4965_init_alive_start,
	.load_ucode = iwl4965_load_bsm,
2074 2075 2076
	.dump_nic_event_log = iwl4965_dump_nic_event_log,
	.dump_nic_error_log = iwl4965_dump_nic_error_log,
	.dump_fh = iwl4965_dump_fh,
2077 2078
	.set_channel_switch = iwl4965_hw_channel_switch,
	.apm_ops = {
2079
		.init = iwl_legacy_apm_init,
2080 2081 2082 2083 2084 2085 2086 2087 2088 2089 2090 2091
		.config = iwl4965_nic_config,
	},
	.eeprom_ops = {
		.regulatory_bands = {
			EEPROM_REGULATORY_BAND_1_CHANNELS,
			EEPROM_REGULATORY_BAND_2_CHANNELS,
			EEPROM_REGULATORY_BAND_3_CHANNELS,
			EEPROM_REGULATORY_BAND_4_CHANNELS,
			EEPROM_REGULATORY_BAND_5_CHANNELS,
			EEPROM_4965_REGULATORY_BAND_24_HT40_CHANNELS,
			EEPROM_4965_REGULATORY_BAND_52_HT40_CHANNELS
		},
2092 2093
		.acquire_semaphore = iwl4965_eeprom_acquire_semaphore,
		.release_semaphore = iwl4965_eeprom_release_semaphore,
2094 2095
	},
	.send_tx_power	= iwl4965_send_tx_power,
2096
	.update_chain_flags = iwl4965_update_chain_flags,
2097 2098 2099 2100
	.temp_ops = {
		.temperature = iwl4965_temperature_calib,
	},
	.debugfs_ops = {
2101 2102 2103
		.rx_stats_read = iwl4965_ucode_rx_stats_read,
		.tx_stats_read = iwl4965_ucode_tx_stats_read,
		.general_stats_read = iwl4965_ucode_general_stats_read,
2104
	},
2105
	.check_plcp_health = iwl4965_good_plcp_health,
2106 2107 2108 2109 2110
};

static const struct iwl_legacy_ops iwl4965_legacy_ops = {
	.post_associate = iwl4965_post_associate,
	.config_ap = iwl4965_config_ap,
2111 2112
	.manage_ibss_station = iwl4965_manage_ibss_station,
	.update_bcast_stations = iwl4965_update_bcast_stations,
2113 2114 2115
};

struct ieee80211_ops iwl4965_hw_ops = {
2116 2117 2118 2119 2120 2121
	.tx = iwl4965_mac_tx,
	.start = iwl4965_mac_start,
	.stop = iwl4965_mac_stop,
	.add_interface = iwl_legacy_mac_add_interface,
	.remove_interface = iwl_legacy_mac_remove_interface,
	.change_interface = iwl_legacy_mac_change_interface,
2122
	.config = iwl_legacy_mac_config,
2123 2124 2125 2126
	.configure_filter = iwl4965_configure_filter,
	.set_key = iwl4965_mac_set_key,
	.update_tkip_key = iwl4965_mac_update_tkip_key,
	.conf_tx = iwl_legacy_mac_conf_tx,
2127 2128
	.reset_tsf = iwl_legacy_mac_reset_tsf,
	.bss_info_changed = iwl_legacy_mac_bss_info_changed,
2129 2130 2131 2132 2133 2134
	.ampdu_action = iwl4965_mac_ampdu_action,
	.hw_scan = iwl_legacy_mac_hw_scan,
	.sta_add = iwl4965_mac_sta_add,
	.sta_remove = iwl_legacy_mac_sta_remove,
	.channel_switch = iwl4965_mac_channel_switch,
	.tx_last_beacon = iwl_legacy_mac_tx_last_beacon,
2135 2136 2137 2138 2139 2140
};

static const struct iwl_ops iwl4965_ops = {
	.lib = &iwl4965_lib,
	.hcmd = &iwl4965_hcmd,
	.utils = &iwl4965_hcmd_utils,
2141
	.led = &iwl4965_led_ops,
2142 2143 2144 2145 2146 2147 2148 2149 2150 2151 2152 2153 2154 2155 2156 2157 2158 2159 2160 2161 2162 2163
	.legacy = &iwl4965_legacy_ops,
	.ieee80211_ops = &iwl4965_hw_ops,
};

static struct iwl_base_params iwl4965_base_params = {
	.eeprom_size = IWL4965_EEPROM_IMG_SIZE,
	.num_of_queues = IWL49_NUM_QUEUES,
	.num_of_ampdu_queues = IWL49_NUM_AMPDU_QUEUES,
	.pll_cfg_val = 0,
	.set_l0s = true,
	.use_bsm = true,
	.led_compensation = 61,
	.chain_noise_num_beacons = IWL4965_CAL_NUM_BEACONS,
	.plcp_delta_threshold = IWL_MAX_PLCP_ERR_THRESHOLD_DEF,
	.wd_timeout = IWL_DEF_WD_TIMEOUT,
	.temperature_kelvin = true,
	.max_event_log_size = 512,
	.ucode_tracing = true,
	.sensitivity_calib_by_driver = true,
	.chain_noise_calib_by_driver = true,
};

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struct iwl_cfg iwl4965_cfg = {
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	.name = "Intel(R) Wireless WiFi Link 4965AGN",
	.fw_name_pre = IWL4965_FW_PRE,
	.ucode_api_max = IWL4965_UCODE_API_MAX,
	.ucode_api_min = IWL4965_UCODE_API_MIN,
	.sku = IWL_SKU_A|IWL_SKU_G|IWL_SKU_N,
	.valid_tx_ant = ANT_AB,
	.valid_rx_ant = ANT_ABC,
	.eeprom_ver = EEPROM_4965_EEPROM_VERSION,
	.eeprom_calib_ver = EEPROM_4965_TX_POWER_VERSION,
	.ops = &iwl4965_ops,
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	.mod_params = &iwl4965_mod_params,
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	.base_params = &iwl4965_base_params,
	.led_mode = IWL_LED_BLINK,
	/*
	 * Force use of chains B and C for scan RX on 5 GHz band
	 * because the device has off-channel reception on chain A.
	 */
	.scan_rx_antennas[IEEE80211_BAND_5GHZ] = ANT_BC,
};

/* Module firmware */
MODULE_FIRMWARE(IWL4965_MODULE_FIRMWARE(IWL4965_UCODE_API_MAX));