diff options
Diffstat (limited to 'drivers/net/wireless')
| -rw-r--r-- | drivers/net/wireless/iwlwifi/Kconfig | 19 | ||||
| -rw-r--r-- | drivers/net/wireless/iwlwifi/Makefile | 1 | ||||
| -rw-r--r-- | drivers/net/wireless/iwlwifi/iwl-4965-commands.h | 8 | ||||
| -rw-r--r-- | drivers/net/wireless/iwlwifi/iwl-4965.c | 870 | ||||
| -rw-r--r-- | drivers/net/wireless/iwlwifi/iwl-4965.h | 68 | ||||
| -rw-r--r-- | drivers/net/wireless/iwlwifi/iwl-calib.c | 778 | ||||
| -rw-r--r-- | drivers/net/wireless/iwlwifi/iwl-calib.h | 104 | ||||
| -rw-r--r-- | drivers/net/wireless/iwlwifi/iwl-core.h | 7 | ||||
| -rw-r--r-- | drivers/net/wireless/iwlwifi/iwl4965-base.c | 18 |
9 files changed, 1054 insertions, 819 deletions
diff --git a/drivers/net/wireless/iwlwifi/Kconfig b/drivers/net/wireless/iwlwifi/Kconfig index d5b7a76fcaa..a5fdd0f21a7 100644 --- a/drivers/net/wireless/iwlwifi/Kconfig +++ b/drivers/net/wireless/iwlwifi/Kconfig @@ -15,6 +15,15 @@ config IWLWIFI_LEDS bool default n +config IWLWIFI_RUN_TIME_CALIB + bool + depends on IWLCORE + default n + ---help--- + This option will enable run time calibration for the iwlwifi driver. + These calibrations are Sensitivity and Chain Noise. + + config IWLWIFI_RFKILL boolean "IWLWIFI RF kill support" depends on IWLCORE @@ -68,12 +77,14 @@ config IWL4965_SPECTRUM_MEASUREMENT ---help--- This option will enable spectrum measurement for the iwl4965 driver. -config IWL4965_SENSITIVITY - bool "Enable Sensitivity Calibration in iwl4965 driver" +config IWL4965_RUN_TIME_CALIB + bool "Enable run time Calibration for 4965 NIC" + select IWLWIFI_RUN_TIME_CALIB depends on IWL4965 + default y ---help--- - This option will enable sensitivity calibration for the iwl4965 - driver. + This option will enable run time calibration for the iwl4965 driver. + These calibrations are Sensitivity and Chain Noise. If unsure, say yes config IWLWIFI_DEBUG bool "Enable full debugging output in iwl4965 driver" diff --git a/drivers/net/wireless/iwlwifi/Makefile b/drivers/net/wireless/iwlwifi/Makefile index ec6187b75c3..7bc569be4ba 100644 --- a/drivers/net/wireless/iwlwifi/Makefile +++ b/drivers/net/wireless/iwlwifi/Makefile @@ -3,6 +3,7 @@ iwlcore-objs := iwl-core.o iwl-eeprom.o iwl-hcmd.o iwlcore-$(CONFIG_IWLWIFI_DEBUGFS) += iwl-debugfs.o iwlcore-$(CONFIG_IWLWIFI_LEDS) += iwl-led.o iwlcore-$(CONFIG_IWLWIFI_RFKILL) += iwl-rfkill.o +iwlcore-$(CONFIG_IWLWIFI_RUN_TIME_CALIB) += iwl-calib.o obj-$(CONFIG_IWL3945) += iwl3945.o iwl3945-objs := iwl3945-base.o iwl-3945.o iwl-3945-rs.o diff --git a/drivers/net/wireless/iwlwifi/iwl-4965-commands.h b/drivers/net/wireless/iwlwifi/iwl-4965-commands.h index 3bcd107e2d7..c03c04fe14c 100644 --- a/drivers/net/wireless/iwlwifi/iwl-4965-commands.h +++ b/drivers/net/wireless/iwlwifi/iwl-4965-commands.h @@ -2559,7 +2559,7 @@ struct iwl4965_missed_beacon_notif { */ /* - * Table entries in SENSITIVITY_CMD (struct iwl4965_sensitivity_cmd) + * Table entries in SENSITIVITY_CMD (struct iwl_sensitivity_cmd) */ #define HD_TABLE_SIZE (11) /* number of entries */ #define HD_MIN_ENERGY_CCK_DET_INDEX (0) /* table indexes */ @@ -2574,18 +2574,18 @@ struct iwl4965_missed_beacon_notif { #define HD_AUTO_CORR40_X4_TH_ADD_MIN_INDEX (9) #define HD_OFDM_ENERGY_TH_IN_INDEX (10) -/* Control field in struct iwl4965_sensitivity_cmd */ +/* Control field in struct iwl_sensitivity_cmd */ #define SENSITIVITY_CMD_CONTROL_DEFAULT_TABLE __constant_cpu_to_le16(0) #define SENSITIVITY_CMD_CONTROL_WORK_TABLE __constant_cpu_to_le16(1) /** - * struct iwl4965_sensitivity_cmd + * struct iwl_sensitivity_cmd * @control: (1) updates working table, (0) updates default table * @table: energy threshold values, use HD_* as index into table * * Always use "1" in "control" to update uCode's working table and DSP. */ -struct iwl4965_sensitivity_cmd { +struct iwl_sensitivity_cmd { __le16 control; /* always use "1" */ __le16 table[HD_TABLE_SIZE]; /* use HD_* as index */ } __attribute__ ((packed)); diff --git a/drivers/net/wireless/iwlwifi/iwl-4965.c b/drivers/net/wireless/iwlwifi/iwl-4965.c index 17f629fb96f..be4cc5ffa74 100644 --- a/drivers/net/wireless/iwlwifi/iwl-4965.c +++ b/drivers/net/wireless/iwlwifi/iwl-4965.c @@ -43,6 +43,7 @@ #include "iwl-core.h" #include "iwl-io.h" #include "iwl-helpers.h" +#include "iwl-calib.h" /* module parameters */ static struct iwl_mod_params iwl4965_mod_params = { @@ -1032,418 +1033,15 @@ void iwl4965_rf_kill_ct_config(struct iwl_priv *priv) IWL_DEBUG_INFO("REPLY_CT_KILL_CONFIG_CMD succeeded\n"); } -#ifdef CONFIG_IWL4965_SENSITIVITY - -/* "false alarms" are signals that our DSP tries to lock onto, - * but then determines that they are either noise, or transmissions - * from a distant wireless network (also "noise", really) that get - * "stepped on" by stronger transmissions within our own network. - * This algorithm attempts to set a sensitivity level that is high - * enough to receive all of our own network traffic, but not so - * high that our DSP gets too busy trying to lock onto non-network - * activity/noise. */ -static int iwl4965_sens_energy_cck(struct iwl_priv *priv, - u32 norm_fa, - u32 rx_enable_time, - struct statistics_general_data *rx_info) -{ - u32 max_nrg_cck = 0; - int i = 0; - u8 max_silence_rssi = 0; - u32 silence_ref = 0; - u8 silence_rssi_a = 0; - u8 silence_rssi_b = 0; - u8 silence_rssi_c = 0; - u32 val; - - /* "false_alarms" values below are cross-multiplications to assess the - * numbers of false alarms within the measured period of actual Rx - * (Rx is off when we're txing), vs the min/max expected false alarms - * (some should be expected if rx is sensitive enough) in a - * hypothetical listening period of 200 time units (TU), 204.8 msec: - * - * MIN_FA/fixed-time < false_alarms/actual-rx-time < MAX_FA/beacon-time - * - * */ - u32 false_alarms = norm_fa * 200 * 1024; - u32 max_false_alarms = MAX_FA_CCK * rx_enable_time; - u32 min_false_alarms = MIN_FA_CCK * rx_enable_time; - struct iwl4965_sensitivity_data *data = NULL; - - data = &(priv->sensitivity_data); - - data->nrg_auto_corr_silence_diff = 0; - - /* Find max silence rssi among all 3 receivers. - * This is background noise, which may include transmissions from other - * networks, measured during silence before our network's beacon */ - silence_rssi_a = (u8)((rx_info->beacon_silence_rssi_a & - ALL_BAND_FILTER) >> 8); - silence_rssi_b = (u8)((rx_info->beacon_silence_rssi_b & - ALL_BAND_FILTER) >> 8); - silence_rssi_c = (u8)((rx_info->beacon_silence_rssi_c & - ALL_BAND_FILTER) >> 8); - - val = max(silence_rssi_b, silence_rssi_c); - max_silence_rssi = max(silence_rssi_a, (u8) val); - - /* Store silence rssi in 20-beacon history table */ - data->nrg_silence_rssi[data->nrg_silence_idx] = max_silence_rssi; - data->nrg_silence_idx++; - if (data->nrg_silence_idx >= NRG_NUM_PREV_STAT_L) - data->nrg_silence_idx = 0; - - /* Find max silence rssi across 20 beacon history */ - for (i = 0; i < NRG_NUM_PREV_STAT_L; i++) { - val = data->nrg_silence_rssi[i]; - silence_ref = max(silence_ref, val); - } - IWL_DEBUG_CALIB("silence a %u, b %u, c %u, 20-bcn max %u\n", - silence_rssi_a, silence_rssi_b, silence_rssi_c, - silence_ref); - - /* Find max rx energy (min value!) among all 3 receivers, - * measured during beacon frame. - * Save it in 10-beacon history table. */ - i = data->nrg_energy_idx; - val = min(rx_info->beacon_energy_b, rx_info->beacon_energy_c); - data->nrg_value[i] = min(rx_info->beacon_energy_a, val); - - data->nrg_energy_idx++; - if (data->nrg_energy_idx >= 10) - data->nrg_energy_idx = 0; - - /* Find min rx energy (max value) across 10 beacon history. - * This is the minimum signal level that we want to receive well. - * Add backoff (margin so we don't miss slightly lower energy frames). - * This establishes an upper bound (min value) for energy threshold. */ - max_nrg_cck = data->nrg_value[0]; - for (i = 1; i < 10; i++) - max_nrg_cck = (u32) max(max_nrg_cck, (data->nrg_value[i])); - max_nrg_cck += 6; - - IWL_DEBUG_CALIB("rx energy a %u, b %u, c %u, 10-bcn max/min %u\n", - rx_info->beacon_energy_a, rx_info->beacon_energy_b, - rx_info->beacon_energy_c, max_nrg_cck - 6); - - /* Count number of consecutive beacons with fewer-than-desired - * false alarms. */ - if (false_alarms < min_false_alarms) - data->num_in_cck_no_fa++; - else - data->num_in_cck_no_fa = 0; - IWL_DEBUG_CALIB("consecutive bcns with few false alarms = %u\n", - data->num_in_cck_no_fa); - - /* If we got too many false alarms this time, reduce sensitivity */ - if (false_alarms > max_false_alarms) { - IWL_DEBUG_CALIB("norm FA %u > max FA %u\n", - false_alarms, max_false_alarms); - IWL_DEBUG_CALIB("... reducing sensitivity\n"); - data->nrg_curr_state = IWL_FA_TOO_MANY; - - if (data->auto_corr_cck > AUTO_CORR_MAX_TH_CCK) { - /* Store for "fewer than desired" on later beacon */ - data->nrg_silence_ref = silence_ref; - - /* increase energy threshold (reduce nrg value) - * to decrease sensitivity */ - if (data->nrg_th_cck > (NRG_MAX_CCK + NRG_STEP_CCK)) - data->nrg_th_cck = data->nrg_th_cck - - NRG_STEP_CCK; - } - - /* increase auto_corr values to decrease sensitivity */ - if (data->auto_corr_cck < AUTO_CORR_MAX_TH_CCK) - data->auto_corr_cck = AUTO_CORR_MAX_TH_CCK + 1; - else { - val = data->auto_corr_cck + AUTO_CORR_STEP_CCK; - data->auto_corr_cck = min((u32)AUTO_CORR_MAX_CCK, val); - } - val = data->auto_corr_cck_mrc + AUTO_CORR_STEP_CCK; - data->auto_corr_cck_mrc = min((u32)AUTO_CORR_MAX_CCK_MRC, val); - - /* Else if we got fewer than desired, increase sensitivity */ - } else if (false_alarms < min_false_alarms) { - data->nrg_curr_state = IWL_FA_TOO_FEW; - - /* Compare silence level with silence level for most recent - * healthy number or too many false alarms */ - data->nrg_auto_corr_silence_diff = (s32)data->nrg_silence_ref - - (s32)silence_ref; - - IWL_DEBUG_CALIB("norm FA %u < min FA %u, silence diff %d\n", - false_alarms, min_false_alarms, - data->nrg_auto_corr_silence_diff); - - /* Increase value to increase sensitivity, but only if: - * 1a) previous beacon did *not* have *too many* false alarms - * 1b) AND there's a significant difference in Rx levels - * from a previous beacon with too many, or healthy # FAs - * OR 2) We've seen a lot of beacons (100) with too few - * false alarms */ - if ((data->nrg_prev_state != IWL_FA_TOO_MANY) && - ((data->nrg_auto_corr_silence_diff > NRG_DIFF) || - (data->num_in_cck_no_fa > MAX_NUMBER_CCK_NO_FA))) { - - IWL_DEBUG_CALIB("... increasing sensitivity\n"); - /* Increase nrg value to increase sensitivity */ - val = data->nrg_th_cck + NRG_STEP_CCK; - data->nrg_th_cck = min((u32)NRG_MIN_CCK, val); - - /* Decrease auto_corr values to increase sensitivity */ - val = data->auto_corr_cck - AUTO_CORR_STEP_CCK; - data->auto_corr_cck = max((u32)AUTO_CORR_MIN_CCK, val); - - val = data->auto_corr_cck_mrc - AUTO_CORR_STEP_CCK; - data->auto_corr_cck_mrc = - max((u32)AUTO_CORR_MIN_CCK_MRC, val); - - } else - IWL_DEBUG_CALIB("... but not changing sensitivity\n"); - - /* Else we got a healthy number of false alarms, keep status quo */ - } else { - IWL_DEBUG_CALIB(" FA in safe zone\n"); - data->nrg_curr_state = IWL_FA_GOOD_RANGE; - - /* Store for use in "fewer than desired" with later beacon */ - data->nrg_silence_ref = silence_ref; - - /* If previous beacon had too many false alarms, - * give it some extra margin by reducing sensitivity again - * (but don't go below measured energy of desired Rx) */ - if (IWL_FA_TOO_MANY == data->nrg_prev_state) { - IWL_DEBUG_CALIB("... increasing margin\n"); - data->nrg_th_cck -= NRG_MARGIN; - } - } - - /* Make sure the energy threshold does not go above the measured - * energy of the desired Rx signals (reduced by backoff margin), - * or else we might start missing Rx frames. - * Lower value is higher energy, so we use max()! - */ - data->nrg_th_cck = max(max_nrg_cck, data->nrg_th_cck); - IWL_DEBUG_CALIB("new nrg_th_cck %u\n", data->nrg_th_cck); - - data->nrg_prev_state = data->nrg_curr_state; - - return 0; -} - - -static int iwl4965_sens_auto_corr_ofdm(struct iwl_priv *priv, - u32 norm_fa, - u32 rx_enable_time) -{ - u32 val; - u32 false_alarms = norm_fa * 200 * 1024; - u32 max_false_alarms = MAX_FA_OFDM * rx_enable_time; - u32 min_false_alarms = MIN_FA_OFDM * rx_enable_time; - struct iwl4965_sensitivity_data *data = NULL; - - data = &(priv->sensitivity_data); - - /* If we got too many false alarms this time, reduce sensitivity */ - if (false_alarms > max_false_alarms) { - - IWL_DEBUG_CALIB("norm FA %u > max FA %u)\n", - false_alarms, max_false_alarms); - - val = data->auto_corr_ofdm + AUTO_CORR_STEP_OFDM; - data->auto_corr_ofdm = - min((u32)AUTO_CORR_MAX_OFDM, val); - - val = data->auto_corr_ofdm_mrc + AUTO_CORR_STEP_OFDM; - data->auto_corr_ofdm_mrc = - min((u32)AUTO_CORR_MAX_OFDM_MRC, val); - - val = data->auto_corr_ofdm_x1 + AUTO_CORR_STEP_OFDM; - data->auto_corr_ofdm_x1 = - min((u32)AUTO_CORR_MAX_OFDM_X1, val); - - val = data->auto_corr_ofdm_mrc_x1 + AUTO_CORR_STEP_OFDM; - data->auto_corr_ofdm_mrc_x1 = - min((u32)AUTO_CORR_MAX_OFDM_MRC_X1, val); - } - - /* Else if we got fewer than desired, increase sensitivity */ - else if (false_alarms < min_false_alarms) { - - IWL_DEBUG_CALIB("norm FA %u < min FA %u\n", - false_alarms, min_false_alarms); - - val = data->auto_corr_ofdm - AUTO_CORR_STEP_OFDM; - data->auto_corr_ofdm = - max((u32)AUTO_CORR_MIN_OFDM, val); - - val = data->auto_corr_ofdm_mrc - AUTO_CORR_STEP_OFDM; - data->auto_corr_ofdm_mrc = - max((u32)AUTO_CORR_MIN_OFDM_MRC, val); - - val = data->auto_corr_ofdm_x1 - AUTO_CORR_STEP_OFDM; - data->auto_corr_ofdm_x1 = - max((u32)AUTO_CORR_MIN_OFDM_X1, val); - - val = data->auto_corr_ofdm_mrc_x1 - AUTO_CORR_STEP_OFDM; - data->auto_corr_ofdm_mrc_x1 = - max((u32)AUTO_CORR_MIN_OFDM_MRC_X1, val); - } - - else - IWL_DEBUG_CALIB("min FA %u < norm FA %u < max FA %u OK\n", - min_false_alarms, false_alarms, max_false_alarms); - - return 0; -} - -static int iwl4965_sensitivity_callback(struct iwl_priv *priv, - struct iwl_cmd *cmd, struct sk_buff *skb) -{ - /* We didn't cache the SKB; let the caller free it */ - return 1; -} - -/* Prepare a SENSITIVITY_CMD, send to uCode if values have changed */ -static int iwl4965_sensitivity_write(struct iwl_priv *priv, u8 flags) -{ - struct iwl4965_sensitivity_cmd cmd ; - struct iwl4965_sensitivity_data *data = NULL; - struct iwl_host_cmd cmd_out = { - .id = SENSITIVITY_CMD, - .len = sizeof(struct iwl4965_sensitivity_cmd), - .meta.flags = flags, - .data = &cmd, - }; - int ret; - - data = &(priv->sensitivity_data); - - memset(&cmd, 0, sizeof(cmd)); - - cmd.table[HD_AUTO_CORR32_X4_TH_ADD_MIN_INDEX] = - cpu_to_le16((u16)data->auto_corr_ofdm); - cmd.table[HD_AUTO_CORR32_X4_TH_ADD_MIN_MRC_INDEX] = - cpu_to_le16((u16)data->auto_corr_ofdm_mrc); - cmd.table[HD_AUTO_CORR32_X1_TH_ADD_MIN_INDEX] = - cpu_to_le16((u16)data->auto_corr_ofdm_x1); - cmd.table[HD_AUTO_CORR32_X1_TH_ADD_MIN_MRC_INDEX] = - cpu_to_le16((u16)data->auto_corr_ofdm_mrc_x1); - - cmd.table[HD_AUTO_CORR40_X4_TH_ADD_MIN_INDEX] = - cpu_to_le16((u16)data->auto_corr_cck); - cmd.table[HD_AUTO_CORR40_X4_TH_ADD_MIN_MRC_INDEX] = - cpu_to_le16((u16)data->auto_corr_cck_mrc); - - cmd.table[HD_MIN_ENERGY_CCK_DET_INDEX] = - cpu_to_le16((u16)data->nrg_th_cck); - cmd.table[HD_MIN_ENERGY_OFDM_DET_INDEX] = - cpu_to_le16((u16)data->nrg_th_ofdm); - - cmd.table[HD_BARKER_CORR_TH_ADD_MIN_INDEX] = - __constant_cpu_to_le16(190); - cmd.table[HD_BARKER_CORR_TH_ADD_MIN_MRC_INDEX] = - __constant_cpu_to_le16(390); - cmd.table[HD_OFDM_ENERGY_TH_IN_INDEX] = - __constant_cpu_to_le16(62); - - IWL_DEBUG_CALIB("ofdm: ac %u mrc %u x1 %u mrc_x1 %u thresh %u\n", - data->auto_corr_ofdm, data->auto_corr_ofdm_mrc, - data->auto_corr_ofdm_x1, data->auto_corr_ofdm_mrc_x1, - data->nrg_th_ofdm); - - IWL_DEBUG_CALIB("cck: ac %u mrc %u thresh %u\n", - data->auto_corr_cck, data->auto_corr_cck_mrc, - data->nrg_th_cck); - - /* Update uCode's "work" table, and copy it to DSP */ - cmd.control = SENSITIVITY_CMD_CONTROL_WORK_TABLE; - - if (flags & CMD_ASYNC) - cmd_out.meta.u.callback = iwl4965_sensitivity_callback; - - /* Don't send command to uCode if nothing has changed */ - if (!memcmp(&cmd.table[0], &(priv->sensitivity_tbl[0]), - sizeof(u16)*HD_TABLE_SIZE)) { - IWL_DEBUG_CALIB("No change in SENSITIVITY_CMD\n"); - return 0; - } - - /* Copy table for comparison next time */ - memcpy(&(priv->sensitivity_tbl[0]), &(cmd.table[0]), - sizeof(u16)*HD_TABLE_SIZE); - - ret = iwl_send_cmd(priv, &cmd_out); - if (ret) - IWL_ERROR("SENSITIVITY_CMD failed\n"); - - return ret; -} - -void iwl4965_init_sensitivity(struct iwl_priv *priv, u8 flags, u8 force) -{ - struct iwl4965_sensitivity_data *data = NULL; - int i; - int ret = 0; - - IWL_DEBUG_CALIB("Start iwl4965_init_sensitivity\n"); - - if (force) - memset(&(priv->sensitivity_tbl[0]), 0, - sizeof(u16)*HD_TABLE_SIZE); - - /* Clear driver's sensitivity algo data */ - data = &(priv->sensitivity_data); - memset(data, 0, sizeof(struct iwl4965_sensitivity_data)); - - data->num_in_cck_no_fa = 0; - data->nrg_curr_state = IWL_FA_TOO_MANY; - data->nrg_prev_state = IWL_FA_TOO_MANY; - data->nrg_silence_ref = 0; - data->nrg_silence_idx = 0; - data->nrg_energy_idx = 0; - - for (i = 0; i < 10; i++) - data->nrg_value[i] = 0; - - for (i = 0; i < NRG_NUM_PREV_STAT_L; i++) - data->nrg_silence_rssi[i] = 0; - - data->auto_corr_ofdm = 90; - data->auto_corr_ofdm_mrc = 170; - data->auto_corr_ofdm_x1 = 105; - data->auto_corr_ofdm_mrc_x1 = 220; - data->auto_corr_cck = AUTO_CORR_CCK_MIN_VAL_DEF; - data->auto_corr_cck_mrc = 200; - data->nrg_th_cck = 100; - data->nrg_th_ofdm = 100; - - data->last_bad_plcp_cnt_ofdm = 0; - data->last_fa_cnt_ofdm = 0; - data->last_bad_plcp_cnt_cck = 0; - data->last_fa_cnt_cck = 0; - - /* Clear prior Sensitivity command data to force send to uCode */ - if (force) - memset(&(priv->sensitivity_tbl[0]), 0, - sizeof(u16)*HD_TABLE_SIZE); - - ret |= iwl4965_sensitivity_write(priv, flags); - IWL_DEBUG_CALIB("<<return 0x%X\n", ret); - - return; -} - +#ifdef CONFIG_IWL4965_RUN_TIME_CALIB /* 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. */ -void iwl4965_chain_noise_reset(struct iwl_priv *priv) +static void iwl4965_chain_noise_reset(struct iwl_priv *priv) { - struct iwl4965_chain_noise_data *data = NULL; + struct iwl_chain_noise_data *data = &(priv->chain_noise_data); - data = &(priv->chain_noise_data); if ((data->state == IWL_CHAIN_NOISE_ALIVE) && iwl_is_associated(priv)) { struct iwl4965_calibration_cmd cmd; @@ -1452,357 +1050,76 @@ void iwl4965_chain_noise_reset(struct iwl_priv *priv) cmd.diff_gain_a = 0; cmd.diff_gain_b = 0; cmd.diff_gain_c = 0; - iwl_send_cmd_pdu_async(priv, REPLY_PHY_CALIBRATION_CMD, - sizeof(cmd), &cmd, NULL); - msleep(4); + 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"); } - return; } -/* - * Accumulate 20 beacons of signal and noise statistics for each of - * 3 receivers/antennas/rx-chains, then figure out: - * 1) Which antennas are connected. - * 2) Differential rx gain settings to balance the 3 receivers. - */ -static void iwl4965_noise_calibration(struct iwl_priv *priv, - struct iwl4965_notif_statistics *stat_resp) +static void iwl4965_gain_computation(struct iwl_priv *priv, + u32 *average_noise, + u16 min_average_noise_antenna_i, + u32 min_average_noise) { - struct iwl4965_chain_noise_data *data = NULL; - int ret = 0; - - u32 chain_noise_a; - u32 chain_noise_b; - u32 chain_noise_c; - u32 chain_sig_a; - u32 chain_sig_b; - u32 chain_sig_c; - u32 average_sig[NUM_RX_CHAINS] = {INITIALIZATION_VALUE}; - u32 average_noise[NUM_RX_CHAINS] = {INITIALIZATION_VALUE}; - u32 max_average_sig; - u16 max_average_sig_antenna_i; - u32 min_average_noise = MIN_AVERAGE_NOISE_MAX_VALUE; - u16 min_average_noise_antenna_i = INITIALIZATION_VALUE; - u16 i = 0; - u16 chan_num = INITIALIZATION_VALUE; - u32 band = INITIALIZATION_VALUE; - u32 active_chains = 0; - unsigned long flags; - struct statistics_rx_non_phy *rx_info = &(stat_resp->rx.general); - - data = &(priv->chain_noise_data); + int i, ret; + struct iwl_chain_noise_data *data = &priv->chain_noise_data; - /* Accumulate just the first 20 beacons after the first association, - * then we're done forever. */ - if (data->state != IWL_CHAIN_NOISE_ACCUMULATE) { - if (data->state == IWL_CHAIN_NOISE_ALIVE) - IWL_DEBUG_CALIB("Wait for noise calib reset\n"); - return; - } - - spin_lock_irqsave(&priv->lock, flags); - if (rx_info->interference_data_flag != INTERFERENCE_DATA_AVAILABLE) { - IWL_DEBUG_CALIB(" << Interference data unavailable\n"); - spin_unlock_irqrestore(&priv->lock, flags); - return; - } - - band = (priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK) ? 0 : 1; - chan_num = le16_to_cpu(priv->staging_rxon.channel); - - /* Make sure we accumulate data for just the associated channel - * (even if scanning). */ - if ((chan_num != (le32_to_cpu(stat_resp->flag) >> 16)) || - ((STATISTICS_REPLY_FLG_BAND_24G_MSK == - (stat_resp->flag & STATISTICS_REPLY_FLG_BAND_24G_MSK)) && band)) { - IWL_DEBUG_CALIB("Stats not from chan=%d, band=%d\n", - chan_num, band); - spin_unlock_irqrestore(&priv->lock, flags); - return; - } - - /* Accumulate beacon statistics values across 20 beacons */ - chain_noise_a = le32_to_cpu(rx_info->beacon_silence_rssi_a) & - IN_BAND_FILTER; - chain_noise_b = le32_to_cpu(rx_info->beacon_silence_rssi_b) & - IN_BAND_FILTER; - chain_noise_c = le32_to_cpu(rx_info->beacon_silence_rssi_c) & - IN_BAND_FILTER; - - chain_sig_a = le32_to_cpu(rx_info->beacon_rssi_a) & IN_BAND_FILTER; - chain_sig_b = le32_to_cpu(rx_info->beacon_rssi_b) & IN_BAND_FILTER; - chain_sig_c = le32_to_cpu(rx_info->beacon_rssi_c) & IN_BAND_FILTER; + data->delta_gain_code[min_average_noise_antenna_i] = 0; - spin_unlock_irqrestore(&priv->lock, flags); + for (i = 0; i < NUM_RX_CHAINS; i++) { + s32 delta_g = 0; - data->beacon_count++; - - data->chain_noise_a = (chain_noise_a + data->chain_noise_a); - data->chain_noise_b = (chain_noise_b + data->chain_noise_b); - data->chain_noise_c = (chain_noise_c + data->chain_noise_c); - - data->chain_signal_a = (chain_sig_a + data->chain_signal_a); - data->chain_signal_b = (chain_sig_b + data->chain_signal_b); - data->chain_signal_c = (chain_sig_c + data->chain_signal_c); - - IWL_DEBUG_CALIB("chan=%d, band=%d, beacon=%d\n", chan_num, band, - data->beacon_count); - IWL_DEBUG_CALIB("chain_sig: a %d b %d c %d\n", - chain_sig_a, chain_sig_b, chain_sig_c); - IWL_DEBUG_CALIB("chain_noise: a %d b %d c %d\n", - chain_noise_a, chain_noise_b, chain_noise_c); - - /* If this is the 20th beacon, determine: - * 1) Disconnected antennas (using signal strengths) - * 2) Differential gain (using silence noise) to balance receivers */ - if (data->beacon_count == CAL_NUM_OF_BEACONS) { - - /* Analyze signal for disconnected antenna */ - average_sig[0] = (data->chain_signal_a) / CAL_NUM_OF_BEACONS; - average_sig[1] = (data->chain_signal_b) / CAL_NUM_OF_BEACONS; - average_sig[2] = (data->chain_signal_c) / CAL_NUM_OF_BEACONS; - - if (average_sig[0] >= average_sig[1]) { - max_average_sig = average_sig[0]; - max_average_sig_antenna_i = 0; - active_chains = (1 << max_average_sig_antenna_i); - } else { - max_average_sig = average_sig[1]; - max_average_sig_antenna_i = 1; - active_chains = (1 << max_average_sig_antenna_i); - } - - if (average_sig[2] >= max_average_sig) { - max_average_sig = average_sig[2]; - max_average_sig_antenna_i = 2; - active_chains = (1 << max_average_sig_antenna_i); - } - - IWL_DEBUG_CALIB("average_sig: a %d b %d c %d\n", - average_sig[0], average_sig[1], average_sig[2]); - IWL_DEBUG_CALIB("max_average_sig = %d, antenna %d\n", - max_average_sig, max_average_sig_antenna_i); - - /* Compare signal strengths for all 3 receivers. */ - for (i = 0; i < NUM_RX_CHAINS; i++) { - if (i != max_average_sig_antenna_i) { - s32 rssi_delta = (max_average_sig - - average_sig[i]); - - /* If signal is very weak, compared with - * strongest, mark it as disconnected. */ - if (rssi_delta > MAXIMUM_ALLOWED_PATHLOSS) - data->disconn_array[i] = 1; - else - active_chains |= (1 << i); - IWL_DEBUG_CALIB("i = %d rssiDelta = %d " - "disconn_array[i] = %d\n", - i, rssi_delta, data->disconn_array[i]); - } - } - - /*If both chains A & B are disconnected - - * connect B and leave A as is */ - if (data->disconn_array[CHAIN_A] && - data->disconn_array[CHAIN_B]) { - data->disconn_array[CHAIN_B] = 0; - active_chains |= (1 << CHAIN_B); - IWL_DEBUG_CALIB("both A & B chains are disconnected! " - "W/A - declare B as connected\n"); - } - - IWL_DEBUG_CALIB("active_chains (bitwise) = 0x%x\n", - active_chains); - - /* Save for use within RXON, TX, SCAN commands, etc. */ - priv->valid_antenna = active_chains; - - /* Analyze noise for rx balance */ - average_noise[0] = ((data->chain_noise_a)/CAL_NUM_OF_BEACONS); - average_noise[1] = ((data->chain_noise_b)/CAL_NUM_OF_BEACONS); - average_noise[2] = ((data->chain_noise_c)/CAL_NUM_OF_BEACONS); - - for (i = 0; i < NUM_RX_CHAINS; i++) { - if (!(data->disconn_array[i]) && - (average_noise[i] <= min_average_noise)) { - /* This means that chain i is active and has - * lower noise values so far: */ - min_average_noise = average_noise[i]; - min_average_noise_antenna_i = i; - } - } - - data->delta_gain_code[min_average_noise_antenna_i] = 0; - - IWL_DEBUG_CALIB("average_noise: a %d b %d c %d\n", - average_noise[0], average_noise[1], - average_noise[2]); - - IWL_DEBUG_CALIB("min_average_noise = %d, antenna %d\n", - min_average_noise, min_average_noise_antenna_i); - - for (i = 0; i < NUM_RX_CHAINS; i++) { - s32 delta_g = 0; - - if (!(data->disconn_array[i]) && - (data->delta_gain_code[i] == + if (!(data->disconn_array[i]) && + (data->delta_gain_code[i] == CHAIN_NOISE_DELTA_GAIN_INIT_VAL)) { - delta_g = average_noise[i] - min_average_noise; - data->delta_gain_code[i] = (u8)((delta_g * - 10) / 15); - if (CHAIN_NOISE_MAX_DELTA_GAIN_CODE < - data->delta_gain_code[i]) - data->delta_gain_code[i] = - CHAIN_NOISE_MAX_DELTA_GAIN_CODE; - - data->delta_gain_code[i] = - (data->delta_gain_code[i] | (1 << 2)); - } else - data->delta_gain_code[i] = 0; - } - IWL_DEBUG_CALIB("delta_gain_codes: a %d b %d c %d\n", - data->delta_gain_code[0], - data->delta_gain_code[1], - data->delta_gain_code[2]); - - /* Differential gain gets sent to uCode only once */ - if (!data->radio_write) { - struct iwl4965_calibration_cmd cmd; - data->radio_write = 1; - - memset(&cmd, 0, sizeof(cmd)); - cmd.opCode = PHY_CALIBRATE_DIFF_GAIN_CMD; - cmd.diff_gain_a = data->delta_gain_code[0]; - cmd.diff_gain_b = data->delta_gain_code[1]; - cmd.diff_gain_c = data->delta_gain_code[2]; - ret = iwl_send_cmd_pdu(priv, REPLY_PHY_CALIBRATION_CMD, - sizeof(cmd), &cmd); - if (ret) - IWL_DEBUG_CALIB("fail sending cmd " - "REPLY_PHY_CALIBRATION_CMD \n"); - - /* TODO we might want recalculate - * rx_chain in rxon cmd */ - - /* Mark so we run this algo only once! */ - data->state = IWL_CHAIN_NOISE_CALIBRATED; + delta_g = average_noise[i] - min_average_noise; + data->delta_gain_code[i] = (u8)((delta_g * 10) / 15); + data->delta_gain_code[i] = + min(data->delta_gain_code[i], + (u8) CHAIN_NOISE_MAX_DELTA_GAIN_CODE); + + data->delta_gain_code[i] = + (data->delta_gain_code[i] | (1 << 2)); + } else { + data->delta_gain_code[i] = 0; } - 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; - } - return; -} - -static void iwl4965_sensitivity_calibration(struct iwl_priv *priv, - struct iwl4965_notif_statistics *resp) -{ - u32 rx_enable_time; - u32 fa_cck; - u32 fa_ofdm; - u32 bad_plcp_cck; - u32 bad_plcp_ofdm; - u32 norm_fa_ofdm; - u32 norm_fa_cck; - struct iwl4965_sensitivity_data *data = NULL; - struct statistics_rx_non_phy *rx_info = &(resp->rx.general); - struct statistics_rx *statistics = &(resp->rx); - unsigned long flags; - struct statistics_general_data statis; - int ret; - - data = &(priv->sensitivity_data); - - if (!iwl_is_associated(priv)) { - IWL_DEBUG_CALIB("<< - not associated\n"); - return; - } - - spin_lock_irqsave(&priv->lock, flags); - if (rx_info->interference_data_flag != INTERFERENCE_DATA_AVAILABLE) { - IWL_DEBUG_CALIB("<< invalid data.\n"); - spin_unlock_irqrestore(&priv->lock, flags); - return; - } - - /* Extract Statistics: */ - rx_enable_time = le32_to_cpu(rx_info->channel_load); - fa_cck = le32_to_cpu(statistics->cck.false_alarm_cnt); - fa_ofdm = le32_to_cpu(statistics->ofdm.false_alarm_cnt); - bad_plcp_cck = le32_to_cpu(statistics->cck.plcp_err); - bad_plcp_ofdm = le32_to_cpu(statistics->ofdm.plcp_err); - - statis.beacon_silence_rssi_a = - le32_to_cpu(statistics->general.beacon_silence_rssi_a); - statis.beacon_silence_rssi_b = - le32_to_cpu(statistics->general.beacon_silence_rssi_b); - statis.beacon_silence_rssi_c = - le32_to_cpu(statistics->general.beacon_silence_rssi_c); - statis.beacon_energy_a = - le32_to_cpu(statistics->general.beacon_energy_a); - statis.beacon_energy_b = - le32_to_cpu(statistics->general.beacon_energy_b); - statis.beacon_energy_c = - le32_to_cpu(statistics->general.beacon_energy_c); - - spin_unlock_irqrestore(&priv->lock, flags); - - IWL_DEBUG_CALIB("rx_enable_time = %u usecs\n", rx_enable_time); - - if (!rx_enable_time) { - IWL_DEBUG_CALIB("<< RX Enable Time == 0! \n"); - return; - } - - /* These statistics increase monotonically, and do not reset - * at each beacon. Calculate difference from last value, or just - * use the new statistics value if it has reset or wrapped around. */ - if (data->last_bad_plcp_cnt_cck > bad_plcp_cck) - data->last_bad_plcp_cnt_cck = bad_plcp_cck; - else { - bad_plcp_cck -= data->last_bad_plcp_cnt_cck; - data->last_bad_plcp_cnt_cck += bad_plcp_cck; - } - - if (data->last_bad_plcp_cnt_ofdm > bad_plcp_ofdm) - data->last_bad_plcp_cnt_ofdm = bad_plcp_ofdm; - else { - bad_plcp_ofdm -= data->last_bad_plcp_cnt_ofdm; - data->last_bad_plcp_cnt_ofdm += bad_plcp_ofdm; } + IWL_DEBUG_CALIB("delta_gain_codes: a %d b %d c %d\n", + data->delta_gain_code[0], + data->delta_gain_code[1], + data->delta_gain_code[2]); - if (data->last_fa_cnt_ofdm > fa_ofdm) - data->last_fa_cnt_ofdm = fa_ofdm; - else { - fa_ofdm -= data->last_fa_cnt_ofdm; - data->last_fa_cnt_ofdm += fa_ofdm; - } + /* Differential gain gets sent to uCode only once */ + if (!data->radio_write) { + struct iwl4965_calibration_cmd cmd; + data->radio_write = 1; - if (data->last_fa_cnt_cck > fa_cck) - data->last_fa_cnt_cck = fa_cck; - else { - fa_cck -= data->last_fa_cnt_cck; - data->last_fa_cnt_cck += fa_cck; + memset(&cmd, 0, sizeof(cmd)); + cmd.opCode = PHY_CALIBRATE_DIFF_GAIN_CMD; + cmd.diff_gain_a = data->delta_gain_code[0]; + cmd.diff_gain_b = data->delta_gain_code[1]; + cmd.diff_gain_c = data->delta_gain_code[2]; + ret = iwl_send_cmd_pdu(priv, REPLY_PHY_CALIBRATION_CMD, + sizeof(cmd), &cmd); + if (ret) + IWL_DEBUG_CALIB("fail sending cmd " + "REPLY_PHY_CALIBRATION_CMD \n"); + + /* TODO we might want recalculate + * rx_chain in rxon cmd */ + + /* Mark so we run this algo only once! */ + data->state = IWL_CHAIN_NOISE_CALIBRATED; } - - /* Total aborted signal locks */ - norm_fa_ofdm = fa_ofdm + bad_plcp_ofdm; - norm_fa_cck = fa_cck + bad_plcp_cck; - - IWL_DEBUG_CALIB("cck: fa %u badp %u ofdm: fa %u badp %u\n", fa_cck, - bad_plcp_cck, fa_ofdm, bad_plcp_ofdm); - - iwl4965_sens_auto_corr_ofdm(priv, norm_fa_ofdm, rx_enable_time); - iwl4965_sens_energy_cck(priv, norm_fa_cck, rx_enable_time, &statis); - ret = iwl4965_sensitivity_write(priv, CMD_ASYNC); - - return; + 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 iwl4965_bg_sensitivity_work(struct work_struct *work) @@ -1819,21 +1136,15 @@ static void iwl4965_bg_sensitivity_work(struct work_struct *work) } if (priv->start_calib) { - iwl4965_noise_calibration(priv, &priv->statistics); - - if (priv->sensitivity_data.state == - IWL_SENS_CALIB_NEED_REINIT) { - iwl4965_init_sensitivity(priv, CMD_ASYNC, 0); - priv->sensitivity_data.state = IWL_SENS_CALIB_ALLOWED; - } else - iwl4965_sensitivity_calibration(priv, - &priv->statistics); + iwl_chain_noise_calibration(priv, &priv->statistics); + + iwl_sensitivity_calibration(priv, &priv->statistics); } mutex_unlock(&priv->mutex); return; } -#endif /*CONFIG_IWL4965_SENSITIVITY*/ +#endif /*CONFIG_IWL4965_RUN_TIME_CALIB*/ static void iwl4965_bg_txpower_work(struct work_struct *work) { @@ -1932,15 +1243,15 @@ int iwl4965_alive_notify(struct iwl_priv *priv) spin_lock_irqsave(&priv->lock, flags); -#ifdef CONFIG_IWL4965_SENSITIVITY +#ifdef CONFIG_IWL4965_RUN_TIME_CALIB memset(&(priv->sensitivity_data), 0, - sizeof(struct iwl4965_sensitivity_data)); + sizeof(struct iwl_sensitivity_data)); memset(&(priv->chain_noise_data), 0, - sizeof(struct iwl4965_chain_noise_data)); + sizeof(struct iwl_chain_noise_data)); for (i = 0; i < NUM_RX_CHAINS; i++) priv->chain_noise_data.delta_gain_code[i] = CHAIN_NOISE_DELTA_GAIN_INIT_VAL; -#endif /* CONFIG_IWL4965_SENSITIVITY*/ +#endif /* CONFIG_IWL4965_RUN_TIME_CALIB*/ ret = iwl_grab_nic_access(priv); if (ret) { spin_unlock_irqrestore(&priv->lock, flags); @@ -2013,6 +1324,31 @@ int iwl4965_alive_notify(struct iwl_priv *priv) return ret; } +#ifdef CONFIG_IWL4965_RUN_TIME_CALIB +static struct iwl_sensitivity_ranges iwl4965_sensitivity = { + .min_nrg_cck = 97, + .max_nrg_cck = 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, +}; +#endif + /** * iwl4965_hw_set_hw_params * @@ -2044,6 +1380,9 @@ int iwl4965_hw_set_hw_params(struct iwl_priv *priv) priv->hw_params.rx_chains_num = 2; priv->hw_params.valid_tx_ant = (IWL_ANTENNA_MAIN | IWL_ANTENNA_AUX); priv->hw_params.valid_rx_ant = (IWL_ANTENNA_MAIN | IWL_ANTENNA_AUX); +#ifdef CONFIG_IWL4965_RUN_TIME_CALIB + priv->hw_params.sens = &iwl4965_sensitivity; +#endif return 0; } @@ -3202,7 +2541,7 @@ void iwl4965_set_rxon_chain(struct iwl_priv *priv) /* Tell uCode which antennas are actually connected. * Before first association, we assume all antennas are connected. - * Just after first association, iwl4965_noise_calibration() + * Just after first association, iwl_chain_noise_calibration() * checks which antennas actually *are* connected. */ priv->staging_rxon.rx_chain |= cpu_to_le16(priv->valid_antenna << RXON_RX_CHAIN_VALID_POS); @@ -3412,7 +2751,7 @@ void iwl4965_hw_rx_statistics(struct iwl_priv *priv, struct iwl4965_rx_mem_buffe if (unlikely(!test_bit(STATUS_SCANNING, &priv->status)) && (pkt->hdr.cmd == STATISTICS_NOTIFICATION)) { iwl4965_rx_calc_noise(priv); -#ifdef CONFIG_IWL4965_SENSITIVITY +#ifdef CONFIG_IWL4965_RUN_TIME_CALIB queue_work(priv->workqueue, &priv->sensitivity_work); #endif } @@ -4139,7 +3478,7 @@ static void iwl4965_rx_missed_beacon_notif(struct iwl_priv *priv, struct iwl4965_rx_mem_buffer *rxb) { -#ifdef CONFIG_IWL4965_SENSITIVITY +#ifdef CONFIG_IWL4965_RUN_TIME_CALIB struct iwl4965_rx_packet *pkt = (void *)rxb->skb->data; struct iwl4965_missed_beacon_notif *missed_beacon; @@ -4150,11 +3489,10 @@ static void iwl4965_rx_missed_beacon_notif(struct iwl_priv *priv, le32_to_cpu(missed_beacon->total_missed_becons), le32_to_cpu(missed_beacon->num_recvd_beacons), le32_to_cpu(missed_beacon->num_expected_beacons)); - priv->sensitivity_data.state = IWL_SENS_CALIB_NEED_REINIT; - if (unlikely(!test_bit(STATUS_SCANNING, &priv->status))) - queue_work(priv->workqueue, &priv->sensitivity_work); + if (!test_bit(STATUS_SCANNING, &priv->status)) + iwl_init_sensitivity(priv); } -#endif /*CONFIG_IWL4965_SENSITIVITY*/ +#endif /*CONFIG_IWL4965_RUN_TIME_CALIB*/ } #ifdef CONFIG_IWL4965_HT @@ -4930,7 +4268,7 @@ void iwl4965_hw_rx_handler_setup(struct iwl_priv *priv) void iwl4965_hw_setup_deferred_work(struct iwl_priv *priv) { INIT_WORK(&priv->txpower_work, iwl4965_bg_txpower_work); -#ifdef CONFIG_IWL4965_SENSITIVITY +#ifdef CONFIG_IWL4965_RUN_TIME_CALIB INIT_WORK(&priv->sensitivity_work, iwl4965_bg_sensitivity_work); #endif init_timer(&priv->statistics_periodic); @@ -4952,6 +4290,10 @@ static struct iwl_hcmd_ops iwl4965_hcmd = { static struct iwl_hcmd_utils_ops iwl4965_hcmd_utils = { .enqueue_hcmd = iwl4965_enqueue_hcmd, +#ifdef CONFIG_IWL4965_RUN_TIME_CALIB + .chain_noise_reset = iwl4965_chain_noise_reset, + .gain_computation = iwl4965_gain_computation, +#endif }; static struct iwl_lib_ops iwl4965_lib = { diff --git a/drivers/net/wireless/iwlwifi/iwl-4965.h b/drivers/net/wireless/iwlwifi/iwl-4965.h index 581b98556c8..d728dd837e9 100644 --- a/drivers/net/wireless/iwlwifi/iwl-4965.h +++ b/drivers/net/wireless/iwlwifi/iwl-4965.h @@ -566,6 +566,29 @@ struct iwl4965_ibss_seq { struct list_head list; }; +struct iwl_sensitivity_ranges { + u16 min_nrg_cck; + u16 max_nrg_cck; + + u16 nrg_th_cck; + u16 nrg_th_ofdm; + + u16 auto_corr_min_ofdm; + u16 auto_corr_min_ofdm_mrc; + u16 auto_corr_min_ofdm_x1; + u16 auto_corr_min_ofdm_mrc_x1; + + u16 auto_corr_max_ofdm; + u16 auto_corr_max_ofdm_mrc; + u16 auto_corr_max_ofdm_x1; + u16 auto_corr_max_ofdm_mrc_x1; + + u16 auto_corr_max_cck; + u16 auto_corr_max_cck_mrc; + u16 auto_corr_min_cck; + u16 auto_corr_min_cck_mrc; +}; + /** * struct iwl_hw_params * @max_txq_num: Max # Tx queues supported @@ -576,6 +599,7 @@ struct iwl4965_ibss_seq { * @max_rxq_log: Log-base-2 of max_rxq_size * @max_stations: * @bcast_sta_id: + * @struct iwl_sensitivity_ranges: range of sensitivity values */ struct iwl_hw_params { u16 max_txq_num; @@ -590,6 +614,9 @@ struct iwl_hw_params { u32 max_pkt_size; u8 max_stations; u8 bcast_sta_id; +#ifdef CONFIG_IWLWIFI_RUN_TIME_CALIB + const struct iwl_sensitivity_ranges *sens; +#endif }; #define HT_SHORT_GI_20MHZ_ONLY (1 << 0) @@ -732,9 +759,6 @@ extern void iwl4965_add_station(struct iwl_priv *priv, const u8 *addr, extern void iwl4965_set_rxon_chain(struct iwl_priv *priv); extern int iwl4965_alive_notify(struct iwl_priv *priv); extern void iwl4965_update_rate_scaling(struct iwl_priv *priv, u8 mode); -extern void iwl4965_chain_noise_reset(struct iwl_priv *priv); -extern void iwl4965_init_sensitivity(struct iwl_priv *priv, u8 flags, - u8 force); extern void iwl4965_rf_kill_ct_config(struct iwl_priv *priv); extern void iwl4965_hwrate_to_tx_control(struct iwl_priv *priv, u32 rate_n_flags, @@ -818,23 +842,8 @@ struct iwl4965_lq_mngr { #define MAX_FA_CCK 50 #define MIN_FA_CCK 5 -#define NRG_MIN_CCK 97 -#define NRG_MAX_CCK 0 - -#define AUTO_CORR_MIN_OFDM 85 -#define AUTO_CORR_MIN_OFDM_MRC 170 -#define AUTO_CORR_MIN_OFDM_X1 105 -#define AUTO_CORR_MIN_OFDM_MRC_X1 220 -#define AUTO_CORR_MAX_OFDM 120 -#define AUTO_CORR_MAX_OFDM_MRC 210 -#define AUTO_CORR_MAX_OFDM_X1 140 -#define AUTO_CORR_MAX_OFDM_MRC_X1 270 #define AUTO_CORR_STEP_OFDM 1 -#define AUTO_CORR_MIN_CCK (125) -#define AUTO_CORR_MAX_CCK (200) -#define AUTO_CORR_MIN_CCK_MRC 200 -#define AUTO_CORR_MAX_CCK_MRC 400 #define AUTO_CORR_STEP_CCK 3 #define AUTO_CORR_MAX_TH_CCK 160 @@ -865,11 +874,6 @@ enum iwl4965_chain_noise_state { IWL_CHAIN_NOISE_CALIBRATED = 2, }; -enum iwl4965_sensitivity_state { - IWL_SENS_CALIB_ALLOWED = 0, - IWL_SENS_CALIB_NEED_REINIT = 1, -}; - enum iwl4965_calib_enabled_state { IWL_CALIB_DISABLED = 0, /* must be 0 */ IWL_CALIB_ENABLED = 1, @@ -884,8 +888,9 @@ struct statistics_general_data { u32 beacon_energy_c; }; +#ifdef CONFIG_IWLWIFI_RUN_TIME_CALIB /* Sensitivity calib data */ -struct iwl4965_sensitivity_data { +struct iwl_sensitivity_data { u32 auto_corr_ofdm; u32 auto_corr_ofdm_mrc; u32 auto_corr_ofdm_x1; @@ -909,12 +914,10 @@ struct iwl4965_sensitivity_data { s32 nrg_auto_corr_silence_diff; u32 num_in_cck_no_fa; u32 nrg_th_ofdm; - - u8 state; }; /* Chain noise (differential Rx gain) calib data */ -struct iwl4965_chain_noise_data { +struct iwl_chain_noise_data { u8 state; u16 beacon_count; u32 chain_noise_a; @@ -927,6 +930,7 @@ struct iwl4965_chain_noise_data { u8 delta_gain_code[NUM_RX_CHAINS]; u8 radio_write; }; +#endif /* CONFIG_IWLWIFI_RUN_TIME_CALIB */ #define EEPROM_SEM_TIMEOUT 10 /* milliseconds */ #define EEPROM_SEM_RETRY_LIMIT 1000 /* number of attempts (not time) */ @@ -1051,12 +1055,12 @@ struct iwl_priv { u8 assoc_station_added; u8 use_ant_b_for_management_frame; /* Tx antenna selection */ u8 valid_antenna; /* Bit mask of antennas actually connected */ -#ifdef CONFIG_IWL4965_SENSITIVITY - struct iwl4965_sensitivity_data sensitivity_data; - struct iwl4965_chain_noise_data chain_noise_data; u8 start_calib; +#ifdef CONFIG_IWLWIFI_RUN_TIME_CALIB + struct iwl_sensitivity_data sensitivity_data; + struct iwl_chain_noise_data chain_noise_data; __le16 sensitivity_tbl[HD_TABLE_SIZE]; -#endif /*CONFIG_IWL4965_SENSITIVITY*/ +#endif /*CONFIG_IWLWIFI_RUN_TIME_CALIB*/ #ifdef CONFIG_IWL4965_HT struct iwl_ht_info current_ht_config; @@ -1206,7 +1210,7 @@ struct iwl_priv { #endif /* CONFIG_IWLWIFI_DEBUG */ struct work_struct txpower_work; -#ifdef CONFIG_IWL4965_SENSITIVITY +#ifdef CONFIG_IWL4965_RUN_TIME_CALIB struct work_struct sensitivity_work; #endif struct timer_list statistics_periodic; diff --git a/drivers/net/wireless/iwlwifi/iwl-calib.c b/drivers/net/wireless/iwlwifi/iwl-calib.c new file mode 100644 index 00000000000..16213b05ed9 --- /dev/null +++ b/drivers/net/wireless/iwlwifi/iwl-calib.c @@ -0,0 +1,778 @@ +/****************************************************************************** + * + * This file is provided under a dual BSD/GPLv2 license. When using or + * redistributing this file, you may do so under either license. + * + * GPL LICENSE SUMMARY + * + * Copyright(c) 2008 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: + * Tomas Winkler <tomas.winkler@intel.com> + * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497 + * + * BSD LICENSE + * + * Copyright(c) 2005 - 2008 Intel Corporation. All rights reserved. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * + * * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * * Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in + * the documentation and/or other materials provided with the + * distribution. + * * Neither the name Intel Corporation nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR + * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT + * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, + * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT + * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, + * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY + * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + *****************************************************************************/ + +#include <linux/kernel.h> +#include <net/mac80211.h> + +#include "iwl-4965.h" +#include "iwl-core.h" +#include "iwl-calib.h" +#include "iwl-eeprom.h" + +/* "false alarms" are signals that our DSP tries to lock onto, + * but then determines that they are either noise, or transmissions + * from a distant wireless network (also "noise", really) that get + * "stepped on" by stronger transmissions within our own network. + * This algorithm attempts to set a sensitivity level that is high + * enough to receive all of our own network traffic, but not so + * high that our DSP gets too busy trying to lock onto non-network + * activity/noise. */ +static int iwl_sens_energy_cck(struct iwl_priv *priv, + u32 norm_fa, + u32 rx_enable_time, + struct statistics_general_data *rx_info) +{ + u32 max_nrg_cck = 0; + int i = 0; + u8 max_silence_rssi = 0; + u32 silence_ref = 0; + u8 silence_rssi_a = 0; + u8 silence_rssi_b = 0; + u8 silence_rssi_c = 0; + u32 val; + + /* "false_alarms" values below are cross-multiplications to assess the + * numbers of false alarms within the measured period of actual Rx + * (Rx is off when we're txing), vs the min/max expected false alarms + * (some should be expected if rx is sensitive enough) in a + * hypothetical listening period of 200 time units (TU), 204.8 msec: + * + * MIN_FA/fixed-time < false_alarms/actual-rx-time < MAX_FA/beacon-time + * + * */ + u32 false_alarms = norm_fa * 200 * 1024; + u32 max_false_alarms = MAX_FA_CCK * rx_enable_time; + u32 min_false_alarms = MIN_FA_CCK * rx_enable_time; + struct iwl_sensitivity_data *data = NULL; + const struct iwl_sensitivity_ranges *ranges = priv->hw_params.sens; + + data = &(priv->sensitivity_data); + + data->nrg_auto_corr_silence_diff = 0; + + /* Find max silence rssi among all 3 receivers. + * This is background noise, which may include transmissions from other + * networks, measured during silence before our network's beacon */ + silence_rssi_a = (u8)((rx_info->beacon_silence_rssi_a & + ALL_BAND_FILTER) >> 8); + silence_rssi_b = (u8)((rx_info->beacon_silence_rssi_b & + ALL_BAND_FILTER) >> 8); + silence_rssi_c = (u8)((rx_info->beacon_silence_rssi_c & + ALL_BAND_FILTER) >> 8); + + val = max(silence_rssi_b, silence_rssi_c); + max_silence_rssi = max(silence_rssi_a, (u8) val); + + /* Store silence rssi in 20-beacon history table */ + data->nrg_silence_rssi[data->nrg_silence_idx] = max_silence_rssi; + data->nrg_silence_idx++; + if (data->nrg_silence_idx >= NRG_NUM_PREV_STAT_L) + data->nrg_silence_idx = 0; + + /* Find max silence rssi across 20 beacon history */ + for (i = 0; i < NRG_NUM_PREV_STAT_L; i++) { + val = data->nrg_silence_rssi[i]; + silence_ref = max(silence_ref, val); + } + IWL_DEBUG_CALIB("silence a %u, b %u, c %u, 20-bcn max %u\n", + silence_rssi_a, silence_rssi_b, silence_rssi_c, + silence_ref); + + /* Find max rx energy (min value!) among all 3 receivers, + * measured during beacon frame. + * Save it in 10-beacon history table. */ + i = data->nrg_energy_idx; + val = min(rx_info->beacon_energy_b, rx_info->beacon_energy_c); + data->nrg_value[i] = min(rx_info->beacon_energy_a, val); + + data->nrg_energy_idx++; + if (data->nrg_energy_idx >= 10) + data->nrg_energy_idx = 0; + + /* Find min rx energy (max value) across 10 beacon history. + * This is the minimum signal level that we want to receive well. + * Add backoff (margin so we don't miss slightly lower energy frames). + * This establishes an upper bound (min value) for energy threshold. */ + max_nrg_cck = data->nrg_value[0]; + for (i = 1; i < 10; i++) + max_nrg_cck = (u32) max(max_nrg_cck, (data->nrg_value[i])); + max_nrg_cck += 6; + + IWL_DEBUG_CALIB("rx energy a %u, b %u, c %u, 10-bcn max/min %u\n", + rx_info->beacon_energy_a, rx_info->beacon_energy_b, + rx_info->beacon_energy_c, max_nrg_cck - 6); + + /* Count number of consecutive beacons with fewer-than-desired + * false alarms. */ + if (false_alarms < min_false_alarms) + data->num_in_cck_no_fa++; + else + data->num_in_cck_no_fa = 0; + IWL_DEBUG_CALIB("consecutive bcns with few false alarms = %u\n", + data->num_in_cck_no_fa); + + /* If we got too many false alarms this time, reduce sensitivity */ + if ((false_alarms > max_false_alarms) && + (data->auto_corr_cck > AUTO_CORR_MAX_TH_CCK)) { + IWL_DEBUG_CALIB("norm FA %u > max FA %u\n", + false_alarms, max_false_alarms); + IWL_DEBUG_CALIB("... reducing sensitivity\n"); + data->nrg_curr_state = IWL_FA_TOO_MANY; + /* Store for "fewer than desired" on later beacon */ + data->nrg_silence_ref = silence_ref; + + /* increase energy threshold (reduce nrg value) + * to decrease sensitivity */ + if (data->nrg_th_cck > + (ranges->max_nrg_cck + NRG_STEP_CCK)) + data->nrg_th_cck = data->nrg_th_cck + - NRG_STEP_CCK; + else + data->nrg_th_cck = ranges->max_nrg_cck; + /* Else if we got fewer than desired, increase sensitivity */ + } else if (false_alarms < min_false_alarms) { + data->nrg_curr_state = IWL_FA_TOO_FEW; + + /* Compare silence level with silence level for most recent + * healthy number or too many false alarms */ + data->nrg_auto_corr_silence_diff = (s32)data->nrg_silence_ref - + (s32)silence_ref; + + IWL_DEBUG_CALIB("norm FA %u < min FA %u, silence diff %d\n", + false_alarms, min_false_alarms, + data->nrg_auto_corr_silence_diff); + + /* Increase value to increase sensitivity, but only if: + * 1a) previous beacon did *not* have *too many* false alarms + * 1b) AND there's a significant difference in Rx levels + * from a previous beacon with too many, or healthy # FAs + * OR 2) We've seen a lot of beacons (100) with too few + * false alarms */ + if ((data->nrg_prev_state != IWL_FA_TOO_MANY) && + ((data->nrg_auto_corr_silence_diff > NRG_DIFF) || + (data->num_in_cck_no_fa > MAX_NUMBER_CCK_NO_FA))) { + + IWL_DEBUG_CALIB("... increasing sensitivity\n"); + /* Increase nrg value to increase sensitivity */ + val = data->nrg_th_cck + NRG_STEP_CCK; + data->nrg_th_cck = min((u32)ranges->min_nrg_cck, val); + } else { + IWL_DEBUG_CALIB("... but not changing sensitivity\n"); + } + + /* Else we got a healthy number of false alarms, keep status quo */ + } else { + IWL_DEBUG_CALIB(" FA in safe zone\n"); + data->nrg_curr_state = IWL_FA_GOOD_RANGE; + + /* Store for use in "fewer than desired" with later beacon */ + data->nrg_silence_ref = silence_ref; + + /* If previous beacon had too many false alarms, + * give it some extra margin by reducing sensitivity again + * (but don't go below measured energy of desired Rx) */ + if (IWL_FA_TOO_MANY == data->nrg_prev_state) { + IWL_DEBUG_CALIB("... increasing margin\n"); + if (data->nrg_th_cck > (max_nrg_cck + NRG_MARGIN)) + data->nrg_th_cck -= NRG_MARGIN; + else + data->nrg_th_cck = max_nrg_cck; + } + } + + /* Make sure the energy threshold does not go above the measured + * energy of the desired Rx signals (reduced by backoff margin), + * or else we might start missing Rx frames. + * Lower value is higher energy, so we use max()! + */ + data->nrg_th_cck = max(max_nrg_cck, data->nrg_th_cck); + IWL_DEBUG_CALIB("new nrg_th_cck %u\n", data->nrg_th_cck); + + data->nrg_prev_state = data->nrg_curr_state; + + /* Auto-correlation CCK algorithm */ + if (false_alarms > min_false_alarms) { + + /* increase auto_corr values to decrease sensitivity + * so the DSP won't be disturbed by the noise + */ + if (data->auto_corr_cck < AUTO_CORR_MAX_TH_CCK) + data->auto_corr_cck = AUTO_CORR_MAX_TH_CCK + 1; + else { + val = data->auto_corr_cck + AUTO_CORR_STEP_CCK; + data->auto_corr_cck = + min((u32)ranges->auto_corr_max_cck, val); + } + val = data->auto_corr_cck_mrc + AUTO_CORR_STEP_CCK; + data->auto_corr_cck_mrc = + min((u32)ranges->auto_corr_max_cck_mrc, val); + } else if ((false_alarms < min_false_alarms) && + ((data->nrg_auto_corr_silence_diff > NRG_DIFF) || + (data->num_in_cck_no_fa > MAX_NUMBER_CCK_NO_FA))) { + + /* Decrease auto_corr values to increase sensitivity */ + val = data->auto_corr_cck - AUTO_CORR_STEP_CCK; + data->auto_corr_cck = + max((u32)ranges->auto_corr_min_cck, val); + val = data->auto_corr_cck_mrc - AUTO_CORR_STEP_CCK; + data->auto_corr_cck_mrc = + max((u32)ranges->auto_corr_min_cck_mrc, val); + } + + return 0; +} + + +static int iwl_sens_auto_corr_ofdm(struct iwl_priv *priv, + u32 norm_fa, + u32 rx_enable_time) +{ + u32 val; + u32 false_alarms = norm_fa * 200 * 1024; + u32 max_false_alarms = MAX_FA_OFDM * rx_enable_time; + u32 min_false_alarms = MIN_FA_OFDM * rx_enable_time; + struct iwl_sensitivity_data *data = NULL; + const struct iwl_sensitivity_ranges *ranges = priv->hw_params.sens; + + data = &(priv->sensitivity_data); + + /* If we got too many false alarms this time, reduce sensitivity */ + if (false_alarms > max_false_alarms) { + + IWL_DEBUG_CALIB("norm FA %u > max FA %u)\n", + false_alarms, max_false_alarms); + + val = data->auto_corr_ofdm + AUTO_CORR_STEP_OFDM; + data->auto_corr_ofdm = + min((u32)ranges->auto_corr_max_ofdm, val); + + val = data->auto_corr_ofdm_mrc + AUTO_CORR_STEP_OFDM; + data->auto_corr_ofdm_mrc = + min((u32)ranges->auto_corr_max_ofdm_mrc, val); + + val = data->auto_corr_ofdm_x1 + AUTO_CORR_STEP_OFDM; + data->auto_corr_ofdm_x1 = + min((u32)ranges->auto_corr_max_ofdm_x1, val); + + val = data->auto_corr_ofdm_mrc_x1 + AUTO_CORR_STEP_OFDM; + data->auto_corr_ofdm_mrc_x1 = + min((u32)ranges->auto_corr_max_ofdm_mrc_x1, val); + } + + /* Else if we got fewer than desired, increase sensitivity */ + else if (false_alarms < min_false_alarms) { + + IWL_DEBUG_CALIB("norm FA %u < min FA %u\n", + false_alarms, min_false_alarms); + + val = data->auto_corr_ofdm - AUTO_CORR_STEP_OFDM; + data->auto_corr_ofdm = + max((u32)ranges->auto_corr_min_ofdm, val); + + val = data->auto_corr_ofdm_mrc - AUTO_CORR_STEP_OFDM; + data->auto_corr_ofdm_mrc = + max((u32)ranges->auto_corr_min_ofdm_mrc, val); + + val = data->auto_corr_ofdm_x1 - AUTO_CORR_STEP_OFDM; + data->auto_corr_ofdm_x1 = + max((u32)ranges->auto_corr_min_ofdm_x1, val); + + val = data->auto_corr_ofdm_mrc_x1 - AUTO_CORR_STEP_OFDM; + data->auto_corr_ofdm_mrc_x1 = + max((u32)ranges->auto_corr_min_ofdm_mrc_x1, val); + } else { + IWL_DEBUG_CALIB("min FA %u < norm FA %u < max FA %u OK\n", + min_false_alarms, false_alarms, max_false_alarms); + } + return 0; +} + +/* Prepare a SENSITIVITY_CMD, send to uCode if values have changed */ +static int iwl_sensitivity_write(struct iwl_priv *priv) +{ + int ret = 0; + struct iwl_sensitivity_cmd cmd ; + struct iwl_sensitivity_data *data = NULL; + struct iwl_host_cmd cmd_out = { + .id = SENSITIVITY_CMD, + .len = sizeof(struct iwl_sensitivity_cmd), + .meta.flags = CMD_ASYNC, + .data = &cmd, + }; + + data = &(priv->sensitivity_data); + + memset(&cmd, 0, sizeof(cmd)); + + cmd.table[HD_AUTO_CORR32_X4_TH_ADD_MIN_INDEX] = + cpu_to_le16((u16)data->auto_corr_ofdm); + cmd.table[HD_AUTO_CORR32_X4_TH_ADD_MIN_MRC_INDEX] = + cpu_to_le16((u16)data->auto_corr_ofdm_mrc); + cmd.table[HD_AUTO_CORR32_X1_TH_ADD_MIN_INDEX] = + cpu_to_le16((u16)data->auto_corr_ofdm_x1); + cmd.table[HD_AUTO_CORR32_X1_TH_ADD_MIN_MRC_INDEX] = + cpu_to_le16((u16)data->auto_corr_ofdm_mrc_x1); + + cmd.table[HD_AUTO_CORR40_X4_TH_ADD_MIN_INDEX] = + cpu_to_le16((u16)data->auto_corr_cck); + cmd.table[HD_AUTO_CORR40_X4_TH_ADD_MIN_MRC_INDEX] = + cpu_to_le16((u16)data->auto_corr_cck_mrc); + + cmd.table[HD_MIN_ENERGY_CCK_DET_INDEX] = + cpu_to_le16((u16)data->nrg_th_cck); + cmd.table[HD_MIN_ENERGY_OFDM_DET_INDEX] = + cpu_to_le16((u16)data->nrg_th_ofdm); + + cmd.table[HD_BARKER_CORR_TH_ADD_MIN_INDEX] = + __constant_cpu_to_le16(190); + cmd.table[HD_BARKER_CORR_TH_ADD_MIN_MRC_INDEX] = + __constant_cpu_to_le16(390); + cmd.table[HD_OFDM_ENERGY_TH_IN_INDEX] = + __constant_cpu_to_le16(62); + + IWL_DEBUG_CALIB("ofdm: ac %u mrc %u x1 %u mrc_x1 %u thresh %u\n", + data->auto_corr_ofdm, data->auto_corr_ofdm_mrc, + data->auto_corr_ofdm_x1, data->auto_corr_ofdm_mrc_x1, + data->nrg_th_ofdm); + + IWL_DEBUG_CALIB("cck: ac %u mrc %u thresh %u\n", + data->auto_corr_cck, data->auto_corr_cck_mrc, + data->nrg_th_cck); + + /* Update uCode's "work" table, and copy it to DSP */ + cmd.control = SENSITIVITY_CMD_CONTROL_WORK_TABLE; + + /* Don't send command to uCode if nothing has changed */ + if (!memcmp(&cmd.table[0], &(priv->sensitivity_tbl[0]), + sizeof(u16)*HD_TABLE_SIZE)) { + IWL_DEBUG_CALIB("No change in SENSITIVITY_CMD\n"); + return 0; + } + + /* Copy table for comparison next time */ + memcpy(&(priv->sensitivity_tbl[0]), &(cmd.table[0]), + sizeof(u16)*HD_TABLE_SIZE); + + ret = iwl_send_cmd(priv, &cmd_out); + if (ret) + IWL_ERROR("SENSITIVITY_CMD failed\n"); + + return ret; +} + +void iwl_init_sensitivity(struct iwl_priv *priv) +{ + int ret = 0; + int i; + struct iwl_sensitivity_data *data = NULL; + const struct iwl_sensitivity_ranges *ranges = priv->hw_params.sens; + + IWL_DEBUG_CALIB("Start iwl_init_sensitivity\n"); + + /* Clear driver's sensitivity algo data */ + data = &(priv->sensitivity_data); + + if (ranges == NULL) + /* can happen if IWLWIFI_RUN_TIME_CALIB is selected + * but no IWLXXXX_RUN_TIME_CALIB for specific is selected */ + return; + + memset(data, 0, sizeof(struct iwl_sensitivity_data)); + + data->num_in_cck_no_fa = 0; + data->nrg_curr_state = IWL_FA_TOO_MANY; + data->nrg_prev_state = IWL_FA_TOO_MANY; + data->nrg_silence_ref = 0; + data->nrg_silence_idx = 0; + data->nrg_energy_idx = 0; + + for (i = 0; i < 10; i++) + data->nrg_value[i] = 0; + + for (i = 0; i < NRG_NUM_PREV_STAT_L; i++) + data->nrg_silence_rssi[i] = 0; + + data->auto_corr_ofdm = 90; + data->auto_corr_ofdm_mrc = ranges->auto_corr_min_ofdm_mrc; + data->auto_corr_ofdm_x1 = ranges->auto_corr_min_ofdm_x1; + data->auto_corr_ofdm_mrc_x1 = ranges->auto_corr_min_ofdm_mrc_x1; + data->auto_corr_cck = AUTO_CORR_CCK_MIN_VAL_DEF; + data->auto_corr_cck_mrc = ranges->auto_corr_min_cck_mrc; + data->nrg_th_cck = ranges->nrg_th_cck; + data->nrg_th_ofdm = ranges->nrg_th_ofdm; + + data->last_bad_plcp_cnt_ofdm = 0; + data->last_fa_cnt_ofdm = 0; + data->last_bad_plcp_cnt_cck = 0; + data->last_fa_cnt_cck = 0; + + ret |= iwl_sensitivity_write(priv); + IWL_DEBUG_CALIB("<<return 0x%X\n", ret); +} +EXPORT_SYMBOL(iwl_init_sensitivity); + +void iwl_sensitivity_calibration(struct iwl_priv *priv, + struct iwl4965_notif_statistics *resp) +{ + u32 rx_enable_time; + u32 fa_cck; + u32 fa_ofdm; + u32 bad_plcp_cck; + u32 bad_plcp_ofdm; + u32 norm_fa_ofdm; + u32 norm_fa_cck; + struct iwl_sensitivity_data *data = NULL; + struct statistics_rx_non_phy *rx_info = &(resp->rx.general); + struct statistics_rx *statistics = &(resp->rx); + unsigned long flags; + struct statistics_general_data statis; + + data = &(priv->sensitivity_data); + + if (!iwl_is_associated(priv)) { + IWL_DEBUG_CALIB("<< - not associated\n"); + return; + } + + spin_lock_irqsave(&priv->lock, flags); + if (rx_info->interference_data_flag != INTERFERENCE_DATA_AVAILABLE) { + IWL_DEBUG_CALIB("<< invalid data.\n"); + spin_unlock_irqrestore(&priv->lock, flags); + return; + } + + /* Extract Statistics: */ + rx_enable_time = le32_to_cpu(rx_info->channel_load); + fa_cck = le32_to_cpu(statistics->cck.false_alarm_cnt); + fa_ofdm = le32_to_cpu(statistics->ofdm.false_alarm_cnt); + bad_plcp_cck = le32_to_cpu(statistics->cck.plcp_err); + bad_plcp_ofdm = le32_to_cpu(statistics->ofdm.plcp_err); + + statis.beacon_silence_rssi_a = + le32_to_cpu(statistics->general.beacon_silence_rssi_a); + statis.beacon_silence_rssi_b = + le32_to_cpu(statistics->general.beacon_silence_rssi_b); + statis.beacon_silence_rssi_c = + le32_to_cpu(statistics->general.beacon_silence_rssi_c); + statis.beacon_energy_a = + le32_to_cpu(statistics->general.beacon_energy_a); + statis.beacon_energy_b = + le32_to_cpu(statistics->general.beacon_energy_b); + statis.beacon_energy_c = + le32_to_cpu(statistics->general.beacon_energy_c); + + spin_unlock_irqrestore(&priv->lock, flags); + + IWL_DEBUG_CALIB("rx_enable_time = %u usecs\n", rx_enable_time); + + if (!rx_enable_time) { + IWL_DEBUG_CALIB("<< RX Enable Time == 0! \n"); + return; + } + + /* These statistics increase monotonically, and do not reset + * at each beacon. Calculate difference from last value, or just + * use the new statistics value if it has reset or wrapped around. */ + if (data->last_bad_plcp_cnt_cck > bad_plcp_cck) + data->last_bad_plcp_cnt_cck = bad_plcp_cck; + else { + bad_plcp_cck -= data->last_bad_plcp_cnt_cck; + data->last_bad_plcp_cnt_cck += bad_plcp_cck; + } + + if (data->last_bad_plcp_cnt_ofdm > bad_plcp_ofdm) + data->last_bad_plcp_cnt_ofdm = bad_plcp_ofdm; + else { + bad_plcp_ofdm -= data->last_bad_plcp_cnt_ofdm; + data->last_bad_plcp_cnt_ofdm += bad_plcp_ofdm; + } + + if (data->last_fa_cnt_ofdm > fa_ofdm) + data->last_fa_cnt_ofdm = fa_ofdm; + else { + fa_ofdm -= data->last_fa_cnt_ofdm; + data->last_fa_cnt_ofdm += fa_ofdm; + } + + if (data->last_fa_cnt_cck > fa_cck) + data->last_fa_cnt_cck = fa_cck; + else { + fa_cck -= data->last_fa_cnt_cck; + data->last_fa_cnt_cck += fa_cck; + } + + /* Total aborted signal locks */ + norm_fa_ofdm = fa_ofdm + bad_plcp_ofdm; + norm_fa_cck = fa_cck + bad_plcp_cck; + + IWL_DEBUG_CALIB("cck: fa %u badp %u ofdm: fa %u badp %u\n", fa_cck, + bad_plcp_cck, fa_ofdm, bad_plcp_ofdm); + + iwl_sens_auto_corr_ofdm(priv, norm_fa_ofdm, rx_enable_time); + iwl_sens_energy_cck(priv, norm_fa_cck, rx_enable_time, &statis); + iwl_sensitivity_write(priv); + + return; +} +EXPORT_SYMBOL(iwl_sensitivity_calibration); + +/* + * Accumulate 20 beacons of signal and noise statistics for each of + * 3 receivers/antennas/rx-chains, then figure out: + * 1) Which antennas are connected. + * 2) Differential rx gain settings to balance the 3 receivers. + */ +void iwl_chain_noise_calibration(struct iwl_priv *priv, + struct iwl4965_notif_statistics *stat_resp) +{ + struct iwl_chain_noise_data *data = NULL; + + u32 chain_noise_a; + u32 chain_noise_b; + u32 chain_noise_c; + u32 chain_sig_a; + u32 chain_sig_b; + u32 chain_sig_c; + u32 average_sig[NUM_RX_CHAINS] = {INITIALIZATION_VALUE}; + u32 average_noise[NUM_RX_CHAINS] = {INITIALIZATION_VALUE}; + u32 max_average_sig; + u16 max_average_sig_antenna_i; + u32 min_average_noise = MIN_AVERAGE_NOISE_MAX_VALUE; + u16 min_average_noise_antenna_i = INITIALIZATION_VALUE; + u16 i = 0; + u16 rxon_chnum = INITIALIZATION_VALUE; + u16 stat_chnum = INITIALIZATION_VALUE; + u8 rxon_band24; + u8 stat_band24; + u32 active_chains = 0; + u8 num_tx_chains; + unsigned long flags; + struct statistics_rx_non_phy *rx_info = &(stat_resp->rx.general); + + data = &(priv->chain_noise_data); + + /* Accumulate just the first 20 beacons after the first association, + * then we're done forever. */ + if (data->state != IWL_CHAIN_NOISE_ACCUMULATE) { + if (data->state == IWL_CHAIN_NOISE_ALIVE) + IWL_DEBUG_CALIB("Wait for noise calib reset\n"); + return; + } + + spin_lock_irqsave(&priv->lock, flags); + if (rx_info->interference_data_flag != INTERFERENCE_DATA_AVAILABLE) { + IWL_DEBUG_CALIB(" << Interference data unavailable\n"); + spin_unlock_irqrestore(&priv->lock, flags); + return; + } + + rxon_band24 = !!(priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK); + rxon_chnum = le16_to_cpu(priv->staging_rxon.channel); + stat_band24 = !!(stat_resp->flag & STATISTICS_REPLY_FLG_BAND_24G_MSK); + stat_chnum = le32_to_cpu(stat_resp->flag) >> 16; + + /* Make sure we accumulate data for just the associated channel + * (even if scanning). */ + if ((rxon_chnum != stat_chnum) || (rxon_band24 != stat_band24)) { + IWL_DEBUG_CALIB("Stats not from chan=%d, band24=%d\n", + rxon_chnum, rxon_band24); + spin_unlock_irqrestore(&priv->lock, flags); + return; + } + + /* Accumulate beacon statistics values across 20 beacons */ + chain_noise_a = le32_to_cpu(rx_info->beacon_silence_rssi_a) & + IN_BAND_FILTER; + chain_noise_b = le32_to_cpu(rx_info->beacon_silence_rssi_b) & + IN_BAND_FILTER; + chain_noise_c = le32_to_cpu(rx_info->beacon_silence_rssi_c) & + IN_BAND_FILTER; + + chain_sig_a = le32_to_cpu(rx_info->beacon_rssi_a) & IN_BAND_FILTER; + chain_sig_b = le32_to_cpu(rx_info->beacon_rssi_b) & IN_BAND_FILTER; + chain_sig_c = le32_to_cpu(rx_info->beacon_rssi_c) & IN_BAND_FILTER; + + spin_unlock_irqrestore(&priv->lock, flags); + + data->beacon_count++; + + data->chain_noise_a = (chain_noise_a + data->chain_noise_a); + data->chain_noise_b = (chain_noise_b + data->chain_noise_b); + data->chain_noise_c = (chain_noise_c + data->chain_noise_c); + + data->chain_signal_a = (chain_sig_a + data->chain_signal_a); + data->chain_signal_b = (chain_sig_b + data->chain_signal_b); + data->chain_signal_c = (chain_sig_c + data->chain_signal_c); + + IWL_DEBUG_CALIB("chan=%d, band24=%d, beacon=%d\n", + rxon_chnum, rxon_band24, data->beacon_count); + IWL_DEBUG_CALIB("chain_sig: a %d b %d c %d\n", + chain_sig_a, chain_sig_b, chain_sig_c); + IWL_DEBUG_CALIB("chain_noise: a %d b %d c %d\n", + chain_noise_a, chain_noise_b, chain_noise_c); + + /* If this is the 20th beacon, determine: + * 1) Disconnected antennas (using signal strengths) + * 2) Differential gain (using silence noise) to balance receivers */ + if (data->beacon_count != CAL_NUM_OF_BEACONS) + return; + + /* Analyze signal for disconnected antenna */ + average_sig[0] = (data->chain_signal_a) / CAL_NUM_OF_BEACONS; + average_sig[1] = (data->chain_signal_b) / CAL_NUM_OF_BEACONS; + average_sig[2] = (data->chain_signal_c) / CAL_NUM_OF_BEACONS; + + if (average_sig[0] >= average_sig[1]) { + max_average_sig = average_sig[0]; + max_average_sig_antenna_i = 0; + active_chains = (1 << max_average_sig_antenna_i); + } else { + max_average_sig = average_sig[1]; + max_average_sig_antenna_i = 1; + active_chains = (1 << max_average_sig_antenna_i); + } + + if (average_sig[2] >= max_average_sig) { + max_average_sig = average_sig[2]; + max_average_sig_antenna_i = 2; + active_chains = (1 << max_average_sig_antenna_i); + } + + IWL_DEBUG_CALIB("average_sig: a %d b %d c %d\n", + average_sig[0], average_sig[1], average_sig[2]); + IWL_DEBUG_CALIB("max_average_sig = %d, antenna %d\n", + max_average_sig, max_average_sig_antenna_i); + + /* Compare signal strengths for all 3 receivers. */ + for (i = 0; i < NUM_RX_CHAINS; i++) { + if (i != max_average_sig_antenna_i) { + s32 rssi_delta = (max_average_sig - average_sig[i]); + + /* If signal is very weak, compared with + * strongest, mark it as disconnected. */ + if (rssi_delta > MAXIMUM_ALLOWED_PATHLOSS) + data->disconn_array[i] = 1; + else + active_chains |= (1 << i); + IWL_DEBUG_CALIB("i = %d rssiDelta = %d " + "disconn_array[i] = %d\n", + i, rssi_delta, data->disconn_array[i]); + } + } + + num_tx_chains = 0; + for (i = 0; i < NUM_RX_CHAINS; i++) { + /* loops on all the bits of + * priv->hw_setting.valid_tx_ant */ + u8 ant_msk = (1 << i); + if (!(priv->hw_params.valid_tx_ant & ant_msk)) + continue; + + num_tx_chains++; + if (data->disconn_array[i] == 0) + /* there is a Tx antenna connected */ + break; + if (num_tx_chains == priv->hw_params.tx_chains_num && + data->disconn_array[i]) { + /* This is the last TX antenna and is also + * disconnected connect it anyway */ + data->disconn_array[i] = 0; + active_chains |= ant_msk; + IWL_DEBUG_CALIB("All Tx chains are disconnected W/A - " + "declare %d as connected\n", i); + break; + } + } + + IWL_DEBUG_CALIB("active_chains (bitwise) = 0x%x\n", + active_chains); + + /* Save for use within RXON, TX, SCAN commands, etc. */ + priv->valid_antenna = active_chains; + + /* Analyze noise for rx balance */ + average_noise[0] = ((data->chain_noise_a)/CAL_NUM_OF_BEACONS); + average_noise[1] = ((data->chain_noise_b)/CAL_NUM_OF_BEACONS); + average_noise[2] = ((data->chain_noise_c)/CAL_NUM_OF_BEACONS); + + for (i = 0; i < NUM_RX_CHAINS; i++) { + if (!(data->disconn_array[i]) && + (average_noise[i] <= min_average_noise)) { + /* This means that chain i is active and has + * lower noise values so far: */ + min_average_noise = average_noise[i]; + min_average_noise_antenna_i = i; + } + } + + IWL_DEBUG_CALIB("average_noise: a %d b %d c %d\n", + average_noise[0], average_noise[1], + average_noise[2]); + + IWL_DEBUG_CALIB("min_average_noise = %d, antenna %d\n", + min_average_noise, min_average_noise_antenna_i); + + priv->cfg->ops->utils->gain_computation(priv, average_noise, + min_average_noise_antenna_i, min_average_noise); +} +EXPORT_SYMBOL(iwl_chain_noise_calibration); + diff --git a/drivers/net/wireless/iwlwifi/iwl-calib.h b/drivers/net/wireless/iwlwifi/iwl-calib.h new file mode 100644 index 00000000000..c3a3db31199 --- /dev/null +++ b/drivers/net/wireless/iwlwifi/iwl-calib.h @@ -0,0 +1,104 @@ +/****************************************************************************** + * + * This file is provided under a dual BSD/GPLv2 license. When using or + * redistributing this file, you may do so under either license. + * + * GPL LICENSE SUMMARY + * + * Copyright(c) 2008 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: + * Tomas Winkler <tomas.winkler@intel.com> + * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497 + * + * BSD LICENSE + * + * Copyright(c) 2005 - 2008 Intel Corporation. All rights reserved. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * + * * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * * Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in + * the documentation and/or other materials provided with the + * distribution. + * * Neither the name Intel Corporation nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR + * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT + * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, + * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT + * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, + * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY + * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + *****************************************************************************/ +#ifndef __iwl_calib_h__ +#define __iwl_calib_h__ + +#include <linux/kernel.h> +#include <linux/module.h> +#include <linux/version.h> + +#include <net/mac80211.h> +#include "iwl-eeprom.h" +#include "iwl-core.h" +#include "iwl-4965.h" + +#ifdef CONFIG_IWLWIFI_RUN_TIME_CALIB +void iwl_chain_noise_calibration(struct iwl_priv *priv, + struct iwl4965_notif_statistics *stat_resp); +void iwl_sensitivity_calibration(struct iwl_priv *priv, + struct iwl4965_notif_statistics *resp); + +void iwl_init_sensitivity(struct iwl_priv *priv); + +static inline void iwl_chain_noise_reset(struct iwl_priv *priv) +{ + if (priv->cfg->ops->utils->chain_noise_reset) + priv->cfg->ops->utils->chain_noise_reset(priv); +} +#else +static inline void iwl_chain_noise_calibration(struct iwl_priv *priv, + struct iwl4965_notif_statistics *stat_resp) +{ +} +static inline void iwl_sensitivity_calibration(struct iwl_priv *priv, + struct iwl4965_notif_statistics *resp) +{ +} +static inline void iwl_init_sensitivity(struct iwl_priv *priv) +{ +} +static inline void iwl_chain_noise_reset(struct iwl_priv *priv) +{ +} +#endif + +#endif /* __iwl_calib_h__ */ diff --git a/drivers/net/wireless/iwlwifi/iwl-core.h b/drivers/net/wireless/iwlwifi/iwl-core.h index 7193d97630d..dcbd411a476 100644 --- a/drivers/net/wireless/iwlwifi/iwl-core.h +++ b/drivers/net/wireless/iwlwifi/iwl-core.h @@ -87,6 +87,13 @@ struct iwl_hcmd_ops { }; struct iwl_hcmd_utils_ops { int (*enqueue_hcmd)(struct iwl_priv *priv, struct iwl_host_cmd *cmd); +#ifdef CONFIG_IWLWIFI_RUN_TIME_CALIB + void (*gain_computation)(struct iwl_priv *priv, + u32 *average_noise, + u16 min_average_noise_antennat_i, + u32 min_average_noise); + void (*chain_noise_reset)(struct iwl_priv *priv); +#endif }; struct iwl_lib_ops { diff --git a/drivers/net/wireless/iwlwifi/iwl4965-base.c b/drivers/net/wireless/iwlwifi/iwl4965-base.c index 883b42f7e99..8a68ff4323d 100644 --- a/drivers/net/wireless/iwlwifi/iwl4965-base.c +++ b/drivers/net/wireless/iwlwifi/iwl4965-base.c @@ -51,6 +51,7 @@ #include "iwl-io.h" #include "iwl-helpers.h" #include "iwl-sta.h" +#include "iwl-calib.h" static int iwl4965_tx_queue_update_write_ptr(struct iwl_priv *priv, struct iwl4965_tx_queue *txq); @@ -795,14 +796,6 @@ static int iwl4965_commit_rxon(struct iwl_priv *priv) /* station table will be cleared */ priv->assoc_station_added = 0; -#ifdef CONFIG_IWL4965_SENSITIVITY - priv->sensitivity_data.state = IWL_SENS_CALIB_NEED_REINIT; - if (!priv->error_recovering) - priv->start_calib = 0; - - iwl4965_init_sensitivity(priv, CMD_ASYNC, 1); -#endif /* CONFIG_IWL4965_SENSITIVITY */ - /* 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 @@ -846,13 +839,10 @@ static int iwl4965_commit_rxon(struct iwl_priv *priv) iwlcore_clear_stations_table(priv); -#ifdef CONFIG_IWL4965_SENSITIVITY if (!priv->error_recovering) priv->start_calib = 0; - priv->sensitivity_data.state = IWL_SENS_CALIB_NEED_REINIT; - iwl4965_init_sensitivity(priv, CMD_ASYNC, 1); -#endif /* CONFIG_IWL4965_SENSITIVITY */ + iwl_init_sensitivity(priv); memcpy(active_rxon, &priv->staging_rxon, sizeof(*active_rxon)); @@ -6040,11 +6030,9 @@ static void iwl4965_post_associate(struct iwl_priv *priv) iwl4965_sequence_reset(priv); -#ifdef CONFIG_IWL4965_SENSITIVITY /* Enable Rx differential gain and sensitivity calibrations */ - iwl4965_chain_noise_reset(priv); + iwl_chain_noise_reset(priv); priv->start_calib = 1; -#endif /* CONFIG_IWL4965_SENSITIVITY */ if (priv->iw_mode == IEEE80211_IF_TYPE_IBSS) priv->assoc_station_added = 1; |