Commit 7dc77dba authored by Wey-Yi Guy's avatar Wey-Yi Guy Committed by Reinette Chatre
Browse files

iwlwifi: move hcmd related code to separate file



Multiple iwlagn based devices shared the same hcmd related functions.
Move from iwl-5000.c to iwl-agn-hcmd.c file.

Signed-off-by: default avatarWey-Yi Guy <wey-yi.w.guy@intel.com>
Signed-off-by: default avatarReinette Chatre <reinette.chatre@intel.com>
parent 81b8176e
......@@ -10,7 +10,7 @@ CFLAGS_iwl-devtrace.o := -I$(src)
# AGN
obj-$(CONFIG_IWLAGN) += iwlagn.o
iwlagn-objs := iwl-agn.o iwl-agn-rs.o iwl-agn-led.o iwl-agn-ict.o
iwlagn-objs += iwl-agn-ucode.o
iwlagn-objs += iwl-agn-ucode.o iwl-agn-hcmd.o
iwlagn-$(CONFIG_IWL4965) += iwl-4965.o
iwlagn-$(CONFIG_IWL5000) += iwl-5000.o
......
......@@ -220,8 +220,8 @@ static struct iwl_lib_ops iwl1000_lib = {
static const struct iwl_ops iwl1000_ops = {
.ucode = &iwlagn_ucode,
.lib = &iwl1000_lib,
.hcmd = &iwl5000_hcmd,
.utils = &iwl5000_hcmd_utils,
.hcmd = &iwlagn_hcmd,
.utils = &iwlagn_hcmd_utils,
.led = &iwlagn_led_ops,
};
......
......@@ -165,108 +165,6 @@ u16 iwl5000_eeprom_calib_version(struct iwl_priv *priv)
}
static void iwl5000_gain_computation(struct iwl_priv *priv,
u32 average_noise[NUM_RX_CHAINS],
u16 min_average_noise_antenna_i,
u32 min_average_noise,
u8 default_chain)
{
int i;
s32 delta_g;
struct iwl_chain_noise_data *data = &priv->chain_noise_data;
/*
* Find Gain Code for the chains based on "default chain"
*/
for (i = default_chain + 1; i < NUM_RX_CHAINS; i++) {
if ((data->disconn_array[i])) {
data->delta_gain_code[i] = 0;
continue;
}
delta_g = (priv->cfg->chain_noise_scale *
((s32)average_noise[default_chain] -
(s32)average_noise[i])) / 1500;
/* bound gain by 2 bits value max, 3rd bit is sign */
data->delta_gain_code[i] =
min(abs(delta_g), (long) CHAIN_NOISE_MAX_DELTA_GAIN_CODE);
if (delta_g < 0)
/*
* set negative sign ...
* note to Intel developers: This is uCode API format,
* not the format of any internal device registers.
* Do not change this format for e.g. 6050 or similar
* devices. Change format only if more resolution
* (i.e. more than 2 bits magnitude) is needed.
*/
data->delta_gain_code[i] |= (1 << 2);
}
IWL_DEBUG_CALIB(priv, "Delta gains: ANT_B = %d ANT_C = %d\n",
data->delta_gain_code[1], data->delta_gain_code[2]);
if (!data->radio_write) {
struct iwl_calib_chain_noise_gain_cmd cmd;
memset(&cmd, 0, sizeof(cmd));
cmd.hdr.op_code = IWL_PHY_CALIBRATE_CHAIN_NOISE_GAIN_CMD;
cmd.hdr.first_group = 0;
cmd.hdr.groups_num = 1;
cmd.hdr.data_valid = 1;
cmd.delta_gain_1 = data->delta_gain_code[1];
cmd.delta_gain_2 = data->delta_gain_code[2];
iwl_send_cmd_pdu_async(priv, REPLY_PHY_CALIBRATION_CMD,
sizeof(cmd), &cmd, NULL);
data->radio_write = 1;
data->state = IWL_CHAIN_NOISE_CALIBRATED;
}
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;
}
static void iwl5000_chain_noise_reset(struct iwl_priv *priv)
{
struct iwl_chain_noise_data *data = &priv->chain_noise_data;
int ret;
if ((data->state == IWL_CHAIN_NOISE_ALIVE) && iwl_is_associated(priv)) {
struct iwl_calib_chain_noise_reset_cmd cmd;
memset(&cmd, 0, sizeof(cmd));
cmd.hdr.op_code = IWL_PHY_CALIBRATE_CHAIN_NOISE_RESET_CMD;
cmd.hdr.first_group = 0;
cmd.hdr.groups_num = 1;
cmd.hdr.data_valid = 1;
ret = iwl_send_cmd_pdu(priv, REPLY_PHY_CALIBRATION_CMD,
sizeof(cmd), &cmd);
if (ret)
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");
}
}
void iwl5000_rts_tx_cmd_flag(struct ieee80211_tx_info *info,
__le32 *tx_flags)
{
if ((info->control.rates[0].flags & IEEE80211_TX_RC_USE_RTS_CTS) ||
(info->control.rates[0].flags & IEEE80211_TX_RC_USE_CTS_PROTECT))
*tx_flags |= TX_CMD_FLG_RTS_CTS_MSK;
else
*tx_flags &= ~TX_CMD_FLG_RTS_CTS_MSK;
}
static struct iwl_sensitivity_ranges iwl5000_sensitivity = {
.min_nrg_cck = 95,
.max_nrg_cck = 0, /* not used, set to 0 */
......@@ -832,17 +730,6 @@ int iwl5000_txq_agg_disable(struct iwl_priv *priv, u16 txq_id,
return 0;
}
u16 iwl5000_build_addsta_hcmd(const struct iwl_addsta_cmd *cmd, u8 *data)
{
u16 size = (u16)sizeof(struct iwl_addsta_cmd);
struct iwl_addsta_cmd *addsta = (struct iwl_addsta_cmd *)data;
memcpy(addsta, cmd, size);
/* resrved in 5000 */
addsta->rate_n_flags = cpu_to_le16(0);
return size;
}
/*
* Activate/Deactivate Tx DMA/FIFO channels according tx fifos mask
* must be called under priv->lock and mac access
......@@ -1064,12 +951,6 @@ static void iwl5000_rx_reply_tx(struct iwl_priv *priv,
IWL_ERR(priv, "TODO: Implement Tx ABORT REQUIRED!!!\n");
}
/* Currently 5000 is the superset of everything */
u16 iwl5000_get_hcmd_size(u8 cmd_id, u16 len)
{
return len;
}
void iwl5000_setup_deferred_work(struct iwl_priv *priv)
{
/* in 5000 the tx power calibration is done in uCode */
......@@ -1093,52 +974,6 @@ int iwl5000_hw_valid_rtc_data_addr(u32 addr)
(addr < IWL50_RTC_DATA_UPPER_BOUND);
}
static int iwl5000_send_rxon_assoc(struct iwl_priv *priv)
{
int ret = 0;
struct iwl5000_rxon_assoc_cmd rxon_assoc;
const struct iwl_rxon_cmd *rxon1 = &priv->staging_rxon;
const struct iwl_rxon_cmd *rxon2 = &priv->active_rxon;
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->ofdm_ht_triple_stream_basic_rates ==
rxon2->ofdm_ht_triple_stream_basic_rates) &&
(rxon1->acquisition_data == rxon2->acquisition_data) &&
(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 = priv->staging_rxon.flags;
rxon_assoc.filter_flags = priv->staging_rxon.filter_flags;
rxon_assoc.ofdm_basic_rates = priv->staging_rxon.ofdm_basic_rates;
rxon_assoc.cck_basic_rates = priv->staging_rxon.cck_basic_rates;
rxon_assoc.reserved1 = 0;
rxon_assoc.reserved2 = 0;
rxon_assoc.reserved3 = 0;
rxon_assoc.ofdm_ht_single_stream_basic_rates =
priv->staging_rxon.ofdm_ht_single_stream_basic_rates;
rxon_assoc.ofdm_ht_dual_stream_basic_rates =
priv->staging_rxon.ofdm_ht_dual_stream_basic_rates;
rxon_assoc.rx_chain_select_flags = priv->staging_rxon.rx_chain;
rxon_assoc.ofdm_ht_triple_stream_basic_rates =
priv->staging_rxon.ofdm_ht_triple_stream_basic_rates;
rxon_assoc.acquisition_data = priv->staging_rxon.acquisition_data;
ret = iwl_send_cmd_pdu_async(priv, REPLY_RXON_ASSOC,
sizeof(rxon_assoc), &rxon_assoc, NULL);
if (ret)
return ret;
return ret;
}
int iwl5000_send_tx_power(struct iwl_priv *priv)
{
struct iwl5000_tx_power_dbm_cmd tx_power_cmd;
......@@ -1194,61 +1029,6 @@ static void iwl5150_temperature(struct iwl_priv *priv)
iwl_tt_handler(priv);
}
/* Calc max signal level (dBm) among 3 possible receivers */
int iwl5000_calc_rssi(struct iwl_priv *priv,
struct iwl_rx_phy_res *rx_resp)
{
/* data from PHY/DSP regarding signal strength, etc.,
* contents are always there, not configurable by host
*/
struct iwl5000_non_cfg_phy *ncphy =
(struct iwl5000_non_cfg_phy *)rx_resp->non_cfg_phy_buf;
u32 val, rssi_a, rssi_b, rssi_c, max_rssi;
u8 agc;
val = le32_to_cpu(ncphy->non_cfg_phy[IWL50_RX_RES_AGC_IDX]);
agc = (val & IWL50_OFDM_AGC_MSK) >> IWL50_OFDM_AGC_BIT_POS;
/* Find max rssi among 3 possible receivers.
* These values are measured by the digital signal processor (DSP).
* They should stay fairly constant even as the signal strength varies,
* if the radio's automatic gain control (AGC) is working right.
* AGC value (see below) will provide the "interesting" info.
*/
val = le32_to_cpu(ncphy->non_cfg_phy[IWL50_RX_RES_RSSI_AB_IDX]);
rssi_a = (val & IWL50_OFDM_RSSI_A_MSK) >> IWL50_OFDM_RSSI_A_BIT_POS;
rssi_b = (val & IWL50_OFDM_RSSI_B_MSK) >> IWL50_OFDM_RSSI_B_BIT_POS;
val = le32_to_cpu(ncphy->non_cfg_phy[IWL50_RX_RES_RSSI_C_IDX]);
rssi_c = (val & IWL50_OFDM_RSSI_C_MSK) >> IWL50_OFDM_RSSI_C_BIT_POS;
max_rssi = max_t(u32, rssi_a, rssi_b);
max_rssi = max_t(u32, max_rssi, rssi_c);
IWL_DEBUG_STATS(priv, "Rssi In A %d B %d C %d Max %d AGC dB %d\n",
rssi_a, rssi_b, rssi_c, max_rssi, agc);
/* dBm = max_rssi dB - agc dB - constant.
* Higher AGC (higher radio gain) means lower signal. */
return max_rssi - agc - IWL49_RSSI_OFFSET;
}
static int iwl5000_send_tx_ant_config(struct iwl_priv *priv, u8 valid_tx_ant)
{
struct iwl_tx_ant_config_cmd tx_ant_cmd = {
.valid = cpu_to_le32(valid_tx_ant),
};
if (IWL_UCODE_API(priv->ucode_ver) > 1) {
IWL_DEBUG_HC(priv, "select valid tx ant: %u\n", valid_tx_ant);
return iwl_send_cmd_pdu(priv, TX_ANT_CONFIGURATION_CMD,
sizeof(struct iwl_tx_ant_config_cmd),
&tx_ant_cmd);
} else {
IWL_DEBUG_HC(priv, "TX_ANT_CONFIGURATION_CMD not supported\n");
return -EOPNOTSUPP;
}
}
static int iwl5000_hw_channel_switch(struct iwl_priv *priv, u16 channel)
{
struct iwl5000_channel_switch_cmd cmd;
......@@ -1281,22 +1061,6 @@ static int iwl5000_hw_channel_switch(struct iwl_priv *priv, u16 channel)
return iwl_send_cmd_sync(priv, &hcmd);
}
struct iwl_hcmd_ops iwl5000_hcmd = {
.rxon_assoc = iwl5000_send_rxon_assoc,
.commit_rxon = iwl_commit_rxon,
.set_rxon_chain = iwl_set_rxon_chain,
.set_tx_ant = iwl5000_send_tx_ant_config,
};
struct iwl_hcmd_utils_ops iwl5000_hcmd_utils = {
.get_hcmd_size = iwl5000_get_hcmd_size,
.build_addsta_hcmd = iwl5000_build_addsta_hcmd,
.gain_computation = iwl5000_gain_computation,
.chain_noise_reset = iwl5000_chain_noise_reset,
.rts_tx_cmd_flag = iwl5000_rts_tx_cmd_flag,
.calc_rssi = iwl5000_calc_rssi,
};
struct iwl_lib_ops iwl5000_lib = {
.set_hw_params = iwl5000_hw_set_hw_params,
.txq_update_byte_cnt_tbl = iwl5000_txq_update_byte_cnt_tbl,
......@@ -1415,16 +1179,16 @@ static struct iwl_lib_ops iwl5150_lib = {
static const struct iwl_ops iwl5000_ops = {
.ucode = &iwlagn_ucode,
.lib = &iwl5000_lib,
.hcmd = &iwl5000_hcmd,
.utils = &iwl5000_hcmd_utils,
.hcmd = &iwlagn_hcmd,
.utils = &iwlagn_hcmd_utils,
.led = &iwlagn_led_ops,
};
static const struct iwl_ops iwl5150_ops = {
.ucode = &iwlagn_ucode,
.lib = &iwl5150_lib,
.hcmd = &iwl5000_hcmd,
.utils = &iwl5000_hcmd_utils,
.hcmd = &iwlagn_hcmd,
.utils = &iwlagn_hcmd_utils,
.led = &iwlagn_led_ops,
};
......
......@@ -286,8 +286,8 @@ static struct iwl_lib_ops iwl6000_lib = {
static const struct iwl_ops iwl6000_ops = {
.ucode = &iwlagn_ucode,
.lib = &iwl6000_lib,
.hcmd = &iwl5000_hcmd,
.utils = &iwl5000_hcmd_utils,
.hcmd = &iwlagn_hcmd,
.utils = &iwlagn_hcmd_utils,
.led = &iwlagn_led_ops,
};
......@@ -354,8 +354,8 @@ static struct iwl_lib_ops iwl6050_lib = {
static const struct iwl_ops iwl6050_ops = {
.ucode = &iwlagn_ucode,
.lib = &iwl6050_lib,
.hcmd = &iwl5000_hcmd,
.utils = &iwl5000_hcmd_utils,
.hcmd = &iwlagn_hcmd,
.utils = &iwlagn_hcmd_utils,
.led = &iwlagn_led_ops,
};
......
/******************************************************************************
*
* GPL LICENSE SUMMARY
*
* Copyright(c) 2008 - 2010 Intel Corporation. All rights reserved.
*
* 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.GPL.
*
* 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/sched.h>
#include "iwl-dev.h"
#include "iwl-core.h"
#include "iwl-io.h"
#include "iwl-5000-hw.h"
static int iwlagn_send_rxon_assoc(struct iwl_priv *priv)
{
int ret = 0;
struct iwl5000_rxon_assoc_cmd rxon_assoc;
const struct iwl_rxon_cmd *rxon1 = &priv->staging_rxon;
const struct iwl_rxon_cmd *rxon2 = &priv->active_rxon;
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->ofdm_ht_triple_stream_basic_rates ==
rxon2->ofdm_ht_triple_stream_basic_rates) &&
(rxon1->acquisition_data == rxon2->acquisition_data) &&
(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 = priv->staging_rxon.flags;
rxon_assoc.filter_flags = priv->staging_rxon.filter_flags;
rxon_assoc.ofdm_basic_rates = priv->staging_rxon.ofdm_basic_rates;
rxon_assoc.cck_basic_rates = priv->staging_rxon.cck_basic_rates;
rxon_assoc.reserved1 = 0;
rxon_assoc.reserved2 = 0;
rxon_assoc.reserved3 = 0;
rxon_assoc.ofdm_ht_single_stream_basic_rates =
priv->staging_rxon.ofdm_ht_single_stream_basic_rates;
rxon_assoc.ofdm_ht_dual_stream_basic_rates =
priv->staging_rxon.ofdm_ht_dual_stream_basic_rates;
rxon_assoc.rx_chain_select_flags = priv->staging_rxon.rx_chain;
rxon_assoc.ofdm_ht_triple_stream_basic_rates =
priv->staging_rxon.ofdm_ht_triple_stream_basic_rates;
rxon_assoc.acquisition_data = priv->staging_rxon.acquisition_data;
ret = iwl_send_cmd_pdu_async(priv, REPLY_RXON_ASSOC,
sizeof(rxon_assoc), &rxon_assoc, NULL);
if (ret)
return ret;
return ret;
}
static int iwlagn_send_tx_ant_config(struct iwl_priv *priv, u8 valid_tx_ant)
{
struct iwl_tx_ant_config_cmd tx_ant_cmd = {
.valid = cpu_to_le32(valid_tx_ant),
};
if (IWL_UCODE_API(priv->ucode_ver) > 1) {
IWL_DEBUG_HC(priv, "select valid tx ant: %u\n", valid_tx_ant);
return iwl_send_cmd_pdu(priv, TX_ANT_CONFIGURATION_CMD,
sizeof(struct iwl_tx_ant_config_cmd),
&tx_ant_cmd);
} else {
IWL_DEBUG_HC(priv, "TX_ANT_CONFIGURATION_CMD not supported\n");
return -EOPNOTSUPP;
}
}
/* Currently this is the superset of everything */
static u16 iwlagn_get_hcmd_size(u8 cmd_id, u16 len)
{
return len;
}
static u16 iwlagn_build_addsta_hcmd(const struct iwl_addsta_cmd *cmd, u8 *data)
{
u16 size = (u16)sizeof(struct iwl_addsta_cmd);
struct iwl_addsta_cmd *addsta = (struct iwl_addsta_cmd *)data;
memcpy(addsta, cmd, size);
/* resrved in 5000 */
addsta->rate_n_flags = cpu_to_le16(0);
return size;
}
static void iwlagn_gain_computation(struct iwl_priv *priv,
u32 average_noise[NUM_RX_CHAINS],
u16 min_average_noise_antenna_i,
u32 min_average_noise,
u8 default_chain)
{
int i;
s32 delta_g;
struct iwl_chain_noise_data *data = &priv->chain_noise_data;
/*
* Find Gain Code for the chains based on "default chain"
*/
for (i = default_chain + 1; i < NUM_RX_CHAINS; i++) {
if ((data->disconn_array[i])) {
data->delta_gain_code[i] = 0;
continue;
}
delta_g = (priv->cfg->chain_noise_scale *
((s32)average_noise[default_chain] -
(s32)average_noise[i])) / 1500;
/* bound gain by 2 bits value max, 3rd bit is sign */
data->delta_gain_code[i] =
min(abs(delta_g), (long) CHAIN_NOISE_MAX_DELTA_GAIN_CODE);
if (delta_g < 0)
/*
* set negative sign ...
* note to Intel developers: This is uCode API format,
* not the format of any internal device registers.
* Do not change this format for e.g. 6050 or similar
* devices. Change format only if more resolution
* (i.e. more than 2 bits magnitude) is needed.
*/
data->delta_gain_code[i] |= (1 << 2);
}
IWL_DEBUG_CALIB(priv, "Delta gains: ANT_B = %d ANT_C = %d\n",
data->delta_gain_code[1], data->delta_gain_code[2]);
if (!data->radio_write) {
struct iwl_calib_chain_noise_gain_cmd cmd;
memset(&cmd, 0, sizeof(cmd));
cmd.hdr.op_code = IWL_PHY_CALIBRATE_CHAIN_NOISE_GAIN_CMD;
cmd.hdr.first_group = 0;
cmd.hdr.groups_num = 1;
cmd.hdr.data_valid = 1;
cmd.delta_gain_1 = data->delta_gain_code[1];
cmd.delta_gain_2 = data->delta_gain_code[2];
iwl_send_cmd_pdu_async(priv, REPLY_PHY_CALIBRATION_CMD,
sizeof(cmd), &cmd, NULL);
data->radio_write = 1;
data->state = IWL_CHAIN_NOISE_CALIBRATED;
}
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;
}
static void iwlagn_chain_noise_reset(struct iwl_priv *priv)
{
struct iwl_chain_noise_data *data = &priv->chain_noise_data;
int ret;
if ((data->state == IWL_CHAIN_NOISE_ALIVE) && iwl_is_associated(priv)) {
struct iwl_calib_chain_noise_reset_cmd cmd;
memset(&cmd, 0, sizeof(cmd));
cmd.hdr.op_code = IWL_PHY_CALIBRATE_CHAIN_NOISE_RESET_CMD;
cmd.hdr.first_group = 0;
cmd.hdr.groups_num = 1;
cmd.hdr.data_valid = 1;
ret = iwl_send_cmd_pdu(priv, REPLY_PHY_CALIBRATION_CMD,
sizeof(cmd), &cmd);
if (ret)
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 void iwlagn_rts_tx_cmd_flag(struct ieee80211_tx_info *info,
__le32 *tx_flags)
{
if ((info->control.rates[0].flags & IEEE80211_TX_RC_USE_RTS_CTS) ||
(info->control.rates[0].flags & IEEE80211_TX_RC_USE_CTS_PROTECT))
*tx_flags |= TX_CMD_FLG_RTS_CTS_MSK;
else
*tx_flags &= ~TX_CMD_FLG_RTS_CTS_MSK;
}
/* Calc max signal level (dBm) among 3 possible receivers */
static int iwlagn_calc_rssi(struct iwl_priv *priv,
struct iwl_rx_phy_res *rx_resp)
{
/* data from PHY/DSP regarding signal strength, etc.,
* contents are always there, not configurable by host
*/
struct iwl5000_non_cfg_phy *ncphy =
(struct iwl5000_non_cfg_phy *)rx_resp->non_cfg_phy_buf;
u32 val, rssi_a, rssi_b, rssi_c, max_rssi;
u8 agc;
val = le32_to_cpu(ncphy->non_cfg_phy[IWL50_RX_RES_AGC_IDX]);
agc = (val & IWL50_OFDM_AGC_MSK) >> IWL50_OFDM_AGC_BIT_POS;
/* Find max rssi among 3 possible receivers.
* These values are measured by the digital signal processor (DSP).
* They should stay fairly constant even as the signal strength varies,
* if the radio's automatic gain control (AGC) is working right.
* AGC value (see below) will provide the "interesting" info.
*/
val = le32_to_cpu(ncphy->non_cfg_phy[IWL50_RX_RES_RSSI_AB_IDX]);
rssi_a = (val & IWL50_OFDM_RSSI_A_MSK) >> IWL50_OFDM_RSSI_A_BIT_POS;
rssi_b = (val & IWL50_OFDM_RSSI_B_MSK) >> IWL50_OFDM_RSSI_B_BIT_POS;
val = le32_to_cpu(ncphy->non_cfg_phy[IWL50_RX_RES_RSSI_C_IDX]);
rssi_c = (val & IWL50_OFDM_RSSI_C_MSK) >> IWL50_OFDM_RSSI_C_BIT_POS;
max_rssi = max_t(u32, rssi_a, rssi_b);
max_rssi = max_t(u32, max_rssi, rssi_c);
IWL_DEBUG_STATS(priv, "Rssi In A %d B %d C %d Max %d AGC dB %d\n",
rssi_a, rssi_b, rssi_c, max_rssi, agc);
/* dBm = max_rssi dB - agc dB - constant.
* Higher AGC (higher radio gain) means lower signal. */
return max_rssi - agc - IWL49_RSSI_OFFSET;
}