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iwlwifi-5000: add run time calibrations for 5000 

This patch adds support for run time calibrations for the 5000 family HW.
Those calibrations are sensitivity calibration, and chain noise calibration.

Signed-off-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com>
Signed-off-by: Tomas Winkler <tomas.winkler@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
This commit is contained in:
Emmanuel Grumbach 2008-04-24 11:55:30 -07:00 committed by John W. Linville
parent c031bf806f
commit 33fd503346
3 changed files with 141 additions and 0 deletions
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9
drivers/net/wireless/iwlwifi/Kconfig
View File

@ -119,6 +119,15 @@ config IWL5000
This option enables support for Intel Wireless WiFi Link 5000AGN Family
Dependency on 4965 is temporary
config IWL5000_RUN_TIME_CALIB
bool "Enable run time Calibration for 5000 NIC"
select IWLWIFI_RUN_TIME_CALIB
depends on IWL5000
default y
---help---
This option will enable run time calibration for the iwl5000 driver.
These calibrations are Sensitivity and Chain Noise. If unsure, say yes
config IWLWIFI_DEBUGFS
bool "Iwlwifi debugfs support"

31
drivers/net/wireless/iwlwifi/iwl-4965-commands.h
View File

@ -2671,6 +2671,37 @@ struct iwl4965_calibration_cmd {
u8 reserved1;
} __attribute__ ((packed));
/* Phy calibration command for 5000 series */
enum {
IWL5000_PHY_CALIBRATE_DC_CMD = 8,
IWL5000_PHY_CALIBRATE_LO_CMD = 9,
IWL5000_PHY_CALIBRATE_RX_BB_CMD = 10,
IWL5000_PHY_CALIBRATE_TX_IQ_CMD = 11,
IWL5000_PHY_CALIBRATE_RX_IQ_CMD = 12,
IWL5000_PHY_CALIBRATION_NOISE_CMD = 13,
IWL5000_PHY_CALIBRATE_AGC_TABLE_CMD = 14,
IWL5000_PHY_CALIBRATE_CRYSTAL_FRQ_CMD = 15,
IWL5000_PHY_CALIBRATE_BASE_BAND_CMD = 16,
IWL5000_PHY_CALIBRATE_CHAIN_NOISE_RESET_CMD = 18,
IWL5000_PHY_CALIBRATE_CHAIN_NOISE_GAIN_CMD = 19,
};
struct iwl5000_calibration_chain_noise_reset_cmd {
u8 op_code; /* IWL5000_PHY_CALIBRATE_CHAIN_NOISE_RESET_CMD */
u8 flags; /* not used */
__le16 reserved;
} __attribute__ ((packed));
struct iwl5000_calibration_chain_noise_gain_cmd {
u8 op_code; /* IWL5000_PHY_CALIBRATE_CHAIN_NOISE_GAIN_CMD */
u8 flags; /* not used */
__le16 reserved;
u8 delta_gain_1;
u8 delta_gain_2;
__le16 reserved1;
} __attribute__ ((packed));
/******************************************************************************
* (12)
* Miscellaneous Commands:

101
drivers/net/wireless/iwlwifi/iwl-5000.c
View File

@ -125,6 +125,100 @@ static u32 eeprom_indirect_address(const struct iwl_priv *priv, u32 address)
return (address & ADDRESS_MSK) + (offset << 1);
}
#ifdef CONFIG_IWL5000_RUN_TIME_CALIB
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)
{
int i;
s32 delta_g;
struct iwl_chain_noise_data *data = &priv->chain_noise_data;
/* Find Gain Code for the antennas B and C */
for (i = 1; i < NUM_RX_CHAINS; i++) {
if ((data->disconn_array[i])) {
data->delta_gain_code[i] = 0;
continue;
}
delta_g = (1000 * ((s32)average_noise[0] -
(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), CHAIN_NOISE_MAX_DELTA_GAIN_CODE);
if (delta_g < 0)
/* set negative sign */
data->delta_gain_code[i] |= (1 << 2);
}
IWL_DEBUG_CALIB("Delta gains: ANT_B = %d ANT_C = %d\n",
data->delta_gain_code[1], data->delta_gain_code[2]);
if (!data->radio_write) {
struct iwl5000_calibration_chain_noise_gain_cmd cmd;
memset(&cmd, 0, sizeof(cmd));
cmd.op_code = IWL5000_PHY_CALIBRATE_CHAIN_NOISE_GAIN_CMD;
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;
if ((data->state == IWL_CHAIN_NOISE_ALIVE) && iwl_is_associated(priv)) {
struct iwl5000_calibration_chain_noise_reset_cmd cmd;
memset(&cmd, 0, sizeof(cmd));
cmd.op_code = IWL5000_PHY_CALIBRATE_CHAIN_NOISE_RESET_CMD;
if (iwl_send_cmd_pdu(priv, REPLY_PHY_CALIBRATION_CMD,
sizeof(cmd), &cmd))
IWL_ERROR("Could not send REPLY_PHY_CALIBRATION_CMD\n");
data->state = IWL_CHAIN_NOISE_ACCUMULATE;
IWL_DEBUG_CALIB("Run chain_noise_calibrate\n");
}
}
static struct iwl_sensitivity_ranges iwl5000_sensitivity = {
.min_nrg_cck = 95,
.max_nrg_cck = 0,
.auto_corr_min_ofdm = 90,
.auto_corr_min_ofdm_mrc = 170,
.auto_corr_min_ofdm_x1 = 120,
.auto_corr_min_ofdm_mrc_x1 = 240,
.auto_corr_max_ofdm = 120,
.auto_corr_max_ofdm_mrc = 210,
.auto_corr_max_ofdm_x1 = 155,
.auto_corr_max_ofdm_mrc_x1 = 290,
.auto_corr_min_cck = 125,
.auto_corr_max_cck = 200,
.auto_corr_min_cck_mrc = 170,
.auto_corr_max_cck_mrc = 400,
.nrg_th_cck = 95,
.nrg_th_ofdm = 95,
};
#endif /* CONFIG_IWL5000_RUN_TIME_CALIB */
static const u8 *iwl5000_eeprom_query_addr(const struct iwl_priv *priv,
size_t offset)
{
@ -159,6 +253,9 @@ static int iwl5000_hw_set_hw_params(struct iwl_priv *priv)
priv->hw_params.max_bsm_size = BSM_SRAM_SIZE;
priv->hw_params.fat_channel = BIT(IEEE80211_BAND_2GHZ) |
BIT(IEEE80211_BAND_5GHZ);
#ifdef CONFIG_IWL5000_RUN_TIME_CALIB
priv->hw_params.sens = &iwl5000_sensitivity;
#endif
switch (priv->hw_rev & CSR_HW_REV_TYPE_MSK) {
case CSR_HW_REV_TYPE_5100:
@ -202,6 +299,10 @@ static struct iwl_hcmd_ops iwl5000_hcmd = {
};
static struct iwl_hcmd_utils_ops iwl5000_hcmd_utils = {
#ifdef CONFIG_IWL5000_RUN_TIME_CALIB
.gain_computation = iwl5000_gain_computation,
.chain_noise_reset = iwl5000_chain_noise_reset,
#endif
};
static struct iwl_lib_ops iwl5000_lib = {