From: Emmanuel Grumbach Date: Thu, 24 Apr 2008 18:55:30 +0000 (-0700) Subject: iwlwifi-5000: add run time calibrations for 5000 X-Git-Tag: v2.6.27-rc1~969^2~466 X-Git-Url: https://err.no/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=33fd503346ad86bd7470a0f8c4c3080393d14233;p=linux-2.6 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 Signed-off-by: Tomas Winkler Signed-off-by: John W. Linville --- diff --git a/drivers/net/wireless/iwlwifi/Kconfig b/drivers/net/wireless/iwlwifi/Kconfig index 2bc7a9bfc5..cc0006900b 100644 --- a/drivers/net/wireless/iwlwifi/Kconfig +++ b/drivers/net/wireless/iwlwifi/Kconfig @@ -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" diff --git a/drivers/net/wireless/iwlwifi/iwl-4965-commands.h b/drivers/net/wireless/iwlwifi/iwl-4965-commands.h index d0e3f35d49..a5c33f3541 100644 --- a/drivers/net/wireless/iwlwifi/iwl-4965-commands.h +++ b/drivers/net/wireless/iwlwifi/iwl-4965-commands.h @@ -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: diff --git a/drivers/net/wireless/iwlwifi/iwl-5000.c b/drivers/net/wireless/iwlwifi/iwl-5000.c index 7c42bbffff..1a18ac187c 100644 --- a/drivers/net/wireless/iwlwifi/iwl-5000.c +++ b/drivers/net/wireless/iwlwifi/iwl-5000.c @@ -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 = {