From 03dd4cb26d967f9588437b0fc9cc0e8353322bb7 Mon Sep 17 00:00:00 2001 From: André Fabian Silva Delgado Date: Fri, 25 Mar 2016 03:53:42 -0300 Subject: Linux-libre 4.5-gnu --- drivers/net/wireless/iwlegacy/4965-calib.c | 934 ----------------------------- 1 file changed, 934 deletions(-) delete mode 100644 drivers/net/wireless/iwlegacy/4965-calib.c (limited to 'drivers/net/wireless/iwlegacy/4965-calib.c') diff --git a/drivers/net/wireless/iwlegacy/4965-calib.c b/drivers/net/wireless/iwlegacy/4965-calib.c deleted file mode 100644 index e78bdefb8..000000000 --- a/drivers/net/wireless/iwlegacy/4965-calib.c +++ /dev/null @@ -1,934 +0,0 @@ -/****************************************************************************** - * - * 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 - 2011 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 - * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497 - * - * BSD LICENSE - * - * Copyright(c) 2005 - 2011 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 -#include - -#include "common.h" -#include "4965.h" - -/***************************************************************************** - * INIT calibrations framework - *****************************************************************************/ - -struct stats_general_data { - u32 beacon_silence_rssi_a; - u32 beacon_silence_rssi_b; - u32 beacon_silence_rssi_c; - u32 beacon_energy_a; - u32 beacon_energy_b; - u32 beacon_energy_c; -}; - -/***************************************************************************** - * RUNTIME calibrations framework - *****************************************************************************/ - -/* "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 -il4965_sens_energy_cck(struct il_priv *il, u32 norm_fa, u32 rx_enable_time, - struct stats_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 il_sensitivity_data *data = NULL; - const struct il_sensitivity_ranges *ranges = il->hw_params.sens; - - data = &(il->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); - } - D_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; - - D_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; - D_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) { - D_CALIB("norm FA %u > max FA %u\n", false_alarms, - max_false_alarms); - D_CALIB("... reducing sensitivity\n"); - data->nrg_curr_state = IL_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 */ - data->nrg_th_cck = data->nrg_th_cck - NRG_STEP_CCK; - /* Else if we got fewer than desired, increase sensitivity */ - } else if (false_alarms < min_false_alarms) { - data->nrg_curr_state = IL_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; - - D_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 != IL_FA_TOO_MANY && - (data->nrg_auto_corr_silence_diff > NRG_DIFF || - data->num_in_cck_no_fa > MAX_NUMBER_CCK_NO_FA)) { - - D_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 { - D_CALIB("... but not changing sensitivity\n"); - } - - /* Else we got a healthy number of false alarms, keep status quo */ - } else { - D_CALIB(" FA in safe zone\n"); - data->nrg_curr_state = IL_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 (IL_FA_TOO_MANY == data->nrg_prev_state) { - D_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); - D_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 -il4965_sens_auto_corr_ofdm(struct il_priv *il, 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 il_sensitivity_data *data = NULL; - const struct il_sensitivity_ranges *ranges = il->hw_params.sens; - - data = &(il->sensitivity_data); - - /* If we got too many false alarms this time, reduce sensitivity */ - if (false_alarms > max_false_alarms) { - - D_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) { - - D_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 { - D_CALIB("min FA %u < norm FA %u < max FA %u OK\n", - min_false_alarms, false_alarms, max_false_alarms); - } - return 0; -} - -static void -il4965_prepare_legacy_sensitivity_tbl(struct il_priv *il, - struct il_sensitivity_data *data, - __le16 *tbl) -{ - tbl[HD_AUTO_CORR32_X4_TH_ADD_MIN_IDX] = - cpu_to_le16((u16) data->auto_corr_ofdm); - tbl[HD_AUTO_CORR32_X4_TH_ADD_MIN_MRC_IDX] = - cpu_to_le16((u16) data->auto_corr_ofdm_mrc); - tbl[HD_AUTO_CORR32_X1_TH_ADD_MIN_IDX] = - cpu_to_le16((u16) data->auto_corr_ofdm_x1); - tbl[HD_AUTO_CORR32_X1_TH_ADD_MIN_MRC_IDX] = - cpu_to_le16((u16) data->auto_corr_ofdm_mrc_x1); - - tbl[HD_AUTO_CORR40_X4_TH_ADD_MIN_IDX] = - cpu_to_le16((u16) data->auto_corr_cck); - tbl[HD_AUTO_CORR40_X4_TH_ADD_MIN_MRC_IDX] = - cpu_to_le16((u16) data->auto_corr_cck_mrc); - - tbl[HD_MIN_ENERGY_CCK_DET_IDX] = cpu_to_le16((u16) data->nrg_th_cck); - tbl[HD_MIN_ENERGY_OFDM_DET_IDX] = cpu_to_le16((u16) data->nrg_th_ofdm); - - tbl[HD_BARKER_CORR_TH_ADD_MIN_IDX] = - cpu_to_le16(data->barker_corr_th_min); - tbl[HD_BARKER_CORR_TH_ADD_MIN_MRC_IDX] = - cpu_to_le16(data->barker_corr_th_min_mrc); - tbl[HD_OFDM_ENERGY_TH_IN_IDX] = cpu_to_le16(data->nrg_th_cca); - - D_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); - - D_CALIB("cck: ac %u mrc %u thresh %u\n", data->auto_corr_cck, - data->auto_corr_cck_mrc, data->nrg_th_cck); -} - -/* Prepare a C_SENSITIVITY, send to uCode if values have changed */ -static int -il4965_sensitivity_write(struct il_priv *il) -{ - struct il_sensitivity_cmd cmd; - struct il_sensitivity_data *data = NULL; - struct il_host_cmd cmd_out = { - .id = C_SENSITIVITY, - .len = sizeof(struct il_sensitivity_cmd), - .flags = CMD_ASYNC, - .data = &cmd, - }; - - data = &(il->sensitivity_data); - - memset(&cmd, 0, sizeof(cmd)); - - il4965_prepare_legacy_sensitivity_tbl(il, data, &cmd.table[0]); - - /* Update uCode's "work" table, and copy it to DSP */ - cmd.control = C_SENSITIVITY_CONTROL_WORK_TBL; - - /* Don't send command to uCode if nothing has changed */ - if (!memcmp - (&cmd.table[0], &(il->sensitivity_tbl[0]), - sizeof(u16) * HD_TBL_SIZE)) { - D_CALIB("No change in C_SENSITIVITY\n"); - return 0; - } - - /* Copy table for comparison next time */ - memcpy(&(il->sensitivity_tbl[0]), &(cmd.table[0]), - sizeof(u16) * HD_TBL_SIZE); - - return il_send_cmd(il, &cmd_out); -} - -void -il4965_init_sensitivity(struct il_priv *il) -{ - int ret = 0; - int i; - struct il_sensitivity_data *data = NULL; - const struct il_sensitivity_ranges *ranges = il->hw_params.sens; - - if (il->disable_sens_cal) - return; - - D_CALIB("Start il4965_init_sensitivity\n"); - - /* Clear driver's sensitivity algo data */ - data = &(il->sensitivity_data); - - if (ranges == NULL) - return; - - memset(data, 0, sizeof(struct il_sensitivity_data)); - - data->num_in_cck_no_fa = 0; - data->nrg_curr_state = IL_FA_TOO_MANY; - data->nrg_prev_state = IL_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 = ranges->auto_corr_min_ofdm; - 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->barker_corr_th_min = ranges->barker_corr_th_min; - data->barker_corr_th_min_mrc = ranges->barker_corr_th_min_mrc; - data->nrg_th_cca = ranges->nrg_th_cca; - - 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 |= il4965_sensitivity_write(il); - D_CALIB("<disable_sens_cal) - return; - - data = &(il->sensitivity_data); - - if (!il_is_any_associated(il)) { - D_CALIB("<< - not associated\n"); - return; - } - - spin_lock_irqsave(&il->lock, flags); - - rx_info = &(((struct il_notif_stats *)resp)->rx.general); - ofdm = &(((struct il_notif_stats *)resp)->rx.ofdm); - cck = &(((struct il_notif_stats *)resp)->rx.cck); - - if (rx_info->interference_data_flag != INTERFERENCE_DATA_AVAILABLE) { - D_CALIB("<< invalid data.\n"); - spin_unlock_irqrestore(&il->lock, flags); - return; - } - - /* Extract Statistics: */ - rx_enable_time = le32_to_cpu(rx_info->channel_load); - fa_cck = le32_to_cpu(cck->false_alarm_cnt); - fa_ofdm = le32_to_cpu(ofdm->false_alarm_cnt); - bad_plcp_cck = le32_to_cpu(cck->plcp_err); - bad_plcp_ofdm = le32_to_cpu(ofdm->plcp_err); - - statis.beacon_silence_rssi_a = - le32_to_cpu(rx_info->beacon_silence_rssi_a); - statis.beacon_silence_rssi_b = - le32_to_cpu(rx_info->beacon_silence_rssi_b); - statis.beacon_silence_rssi_c = - le32_to_cpu(rx_info->beacon_silence_rssi_c); - statis.beacon_energy_a = le32_to_cpu(rx_info->beacon_energy_a); - statis.beacon_energy_b = le32_to_cpu(rx_info->beacon_energy_b); - statis.beacon_energy_c = le32_to_cpu(rx_info->beacon_energy_c); - - spin_unlock_irqrestore(&il->lock, flags); - - D_CALIB("rx_enable_time = %u usecs\n", rx_enable_time); - - if (!rx_enable_time) { - D_CALIB("<< RX Enable Time == 0!\n"); - return; - } - - /* These stats increase monotonically, and do not reset - * at each beacon. Calculate difference from last value, or just - * use the new stats 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; - - D_CALIB("cck: fa %u badp %u ofdm: fa %u badp %u\n", fa_cck, - bad_plcp_cck, fa_ofdm, bad_plcp_ofdm); - - il4965_sens_auto_corr_ofdm(il, norm_fa_ofdm, rx_enable_time); - il4965_sens_energy_cck(il, norm_fa_cck, rx_enable_time, &statis); - - il4965_sensitivity_write(il); -} - -static inline u8 -il4965_find_first_chain(u8 mask) -{ - if (mask & ANT_A) - return CHAIN_A; - if (mask & ANT_B) - return CHAIN_B; - return CHAIN_C; -} - -/** - * Run disconnected antenna algorithm to find out which antennas are - * disconnected. - */ -static void -il4965_find_disconn_antenna(struct il_priv *il, u32 * average_sig, - struct il_chain_noise_data *data) -{ - u32 active_chains = 0; - u32 max_average_sig; - u16 max_average_sig_antenna_i; - u8 num_tx_chains; - u8 first_chain; - u16 i = 0; - - average_sig[0] = - data->chain_signal_a / - il->cfg->chain_noise_num_beacons; - average_sig[1] = - data->chain_signal_b / - il->cfg->chain_noise_num_beacons; - average_sig[2] = - data->chain_signal_c / - il->cfg->chain_noise_num_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); - } - - D_CALIB("average_sig: a %d b %d c %d\n", average_sig[0], average_sig[1], - average_sig[2]); - D_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); - D_CALIB("i = %d rssiDelta = %d " - "disconn_array[i] = %d\n", i, rssi_delta, - data->disconn_array[i]); - } - } - - /* - * The above algorithm sometimes fails when the ucode - * reports 0 for all chains. It's not clear why that - * happens to start with, but it is then causing trouble - * because this can make us enable more chains than the - * hardware really has. - * - * To be safe, simply mask out any chains that we know - * are not on the device. - */ - active_chains &= il->hw_params.valid_rx_ant; - - num_tx_chains = 0; - for (i = 0; i < NUM_RX_CHAINS; i++) { - /* loops on all the bits of - * il->hw_setting.valid_tx_ant */ - u8 ant_msk = (1 << i); - if (!(il->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 == il->hw_params.tx_chains_num && - data->disconn_array[i]) { - /* - * If all chains are disconnected - * connect the first valid tx chain - */ - first_chain = - il4965_find_first_chain(il->cfg->valid_tx_ant); - data->disconn_array[first_chain] = 0; - active_chains |= BIT(first_chain); - D_CALIB("All Tx chains are disconnected" - "- declare %d as connected\n", first_chain); - break; - } - } - - if (active_chains != il->hw_params.valid_rx_ant && - active_chains != il->chain_noise_data.active_chains) - D_CALIB("Detected that not all antennas are connected! " - "Connected: %#x, valid: %#x.\n", active_chains, - il->hw_params.valid_rx_ant); - - /* Save for use within RXON, TX, SCAN commands, etc. */ - data->active_chains = active_chains; - D_CALIB("active_chains (bitwise) = 0x%x\n", active_chains); -} - -static void -il4965_gain_computation(struct il_priv *il, u32 * average_noise, - u16 min_average_noise_antenna_i, u32 min_average_noise, - u8 default_chain) -{ - int i, ret; - struct il_chain_noise_data *data = &il->chain_noise_data; - - data->delta_gain_code[min_average_noise_antenna_i] = 0; - - for (i = default_chain; i < NUM_RX_CHAINS; i++) { - s32 delta_g = 0; - - 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); - 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; - } - } - D_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 il_calib_diff_gain_cmd cmd; - data->radio_write = 1; - - memset(&cmd, 0, sizeof(cmd)); - cmd.hdr.op_code = IL_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 = il_send_cmd_pdu(il, C_PHY_CALIBRATION, sizeof(cmd), &cmd); - if (ret) - D_CALIB("fail sending cmd " "C_PHY_CALIBRATION\n"); - - /* TODO we might want recalculate - * rx_chain in rxon cmd */ - - /* Mark so we run this algo only once! */ - data->state = IL_CHAIN_NOISE_CALIBRATED; - } -} - -/* - * Accumulate 16 beacons of signal and noise stats 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 -il4965_chain_noise_calibration(struct il_priv *il, void *stat_resp) -{ - struct il_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 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; - unsigned long flags; - struct stats_rx_non_phy *rx_info; - - if (il->disable_chain_noise_cal) - return; - - data = &(il->chain_noise_data); - - /* - * Accumulate just the first "chain_noise_num_beacons" after - * the first association, then we're done forever. - */ - if (data->state != IL_CHAIN_NOISE_ACCUMULATE) { - if (data->state == IL_CHAIN_NOISE_ALIVE) - D_CALIB("Wait for noise calib reset\n"); - return; - } - - spin_lock_irqsave(&il->lock, flags); - - rx_info = &(((struct il_notif_stats *)stat_resp)->rx.general); - - if (rx_info->interference_data_flag != INTERFERENCE_DATA_AVAILABLE) { - D_CALIB(" << Interference data unavailable\n"); - spin_unlock_irqrestore(&il->lock, flags); - return; - } - - rxon_band24 = !!(il->staging.flags & RXON_FLG_BAND_24G_MSK); - rxon_chnum = le16_to_cpu(il->staging.channel); - - stat_band24 = - !!(((struct il_notif_stats *)stat_resp)-> - flag & STATS_REPLY_FLG_BAND_24G_MSK); - stat_chnum = - le32_to_cpu(((struct il_notif_stats *)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) { - D_CALIB("Stats not from chan=%d, band24=%d\n", rxon_chnum, - rxon_band24); - spin_unlock_irqrestore(&il->lock, flags); - return; - } - - /* - * Accumulate beacon stats values across - * "chain_noise_num_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(&il->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); - - D_CALIB("chan=%d, band24=%d, beacon=%d\n", rxon_chnum, rxon_band24, - data->beacon_count); - D_CALIB("chain_sig: a %d b %d c %d\n", chain_sig_a, chain_sig_b, - chain_sig_c); - D_CALIB("chain_noise: a %d b %d c %d\n", chain_noise_a, chain_noise_b, - chain_noise_c); - - /* If this is the "chain_noise_num_beacons", determine: - * 1) Disconnected antennas (using signal strengths) - * 2) Differential gain (using silence noise) to balance receivers */ - if (data->beacon_count != il->cfg->chain_noise_num_beacons) - return; - - /* Analyze signal for disconnected antenna */ - il4965_find_disconn_antenna(il, average_sig, data); - - /* Analyze noise for rx balance */ - average_noise[0] = - data->chain_noise_a / il->cfg->chain_noise_num_beacons; - average_noise[1] = - data->chain_noise_b / il->cfg->chain_noise_num_beacons; - average_noise[2] = - data->chain_noise_c / il->cfg->chain_noise_num_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; - } - } - - D_CALIB("average_noise: a %d b %d c %d\n", average_noise[0], - average_noise[1], average_noise[2]); - - D_CALIB("min_average_noise = %d, antenna %d\n", min_average_noise, - min_average_noise_antenna_i); - - il4965_gain_computation(il, average_noise, min_average_noise_antenna_i, - min_average_noise, - il4965_find_first_chain(il->cfg->valid_rx_ant)); - - /* Some power changes may have been made during the calibration. - * Update and commit the RXON - */ - if (il->ops->update_chain_flags) - il->ops->update_chain_flags(il); - - data->state = IL_CHAIN_NOISE_DONE; - il_power_update_mode(il, false); -} - -void -il4965_reset_run_time_calib(struct il_priv *il) -{ - int i; - memset(&(il->sensitivity_data), 0, sizeof(struct il_sensitivity_data)); - memset(&(il->chain_noise_data), 0, sizeof(struct il_chain_noise_data)); - for (i = 0; i < NUM_RX_CHAINS; i++) - il->chain_noise_data.delta_gain_code[i] = - CHAIN_NOISE_DELTA_GAIN_INIT_VAL; - - /* Ask for stats now, the uCode will send notification - * periodically after association */ - il_send_stats_request(il, CMD_ASYNC, true); -} -- cgit v1.2.3-54-g00ecf