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1054 lines
33 KiB
1054 lines
33 KiB
// SPDX-License-Identifier: GPL-2.0 OR BSD-3-Clause |
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/* |
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* Copyright (C) 2005-2014 Intel Corporation |
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*/ |
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#include <linux/slab.h> |
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#include <net/mac80211.h> |
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#include "iwl-trans.h" |
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#include "dev.h" |
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#include "calib.h" |
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#include "agn.h" |
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/***************************************************************************** |
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* INIT calibrations framework |
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*****************************************************************************/ |
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/* Opaque calibration results */ |
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struct iwl_calib_result { |
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struct list_head list; |
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size_t cmd_len; |
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struct iwl_calib_hdr hdr; |
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/* data follows */ |
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}; |
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struct statistics_general_data { |
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u32 beacon_silence_rssi_a; |
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u32 beacon_silence_rssi_b; |
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u32 beacon_silence_rssi_c; |
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u32 beacon_energy_a; |
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u32 beacon_energy_b; |
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u32 beacon_energy_c; |
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}; |
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int iwl_send_calib_results(struct iwl_priv *priv) |
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{ |
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struct iwl_host_cmd hcmd = { |
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.id = REPLY_PHY_CALIBRATION_CMD, |
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}; |
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struct iwl_calib_result *res; |
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list_for_each_entry(res, &priv->calib_results, list) { |
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int ret; |
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hcmd.len[0] = res->cmd_len; |
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hcmd.data[0] = &res->hdr; |
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hcmd.dataflags[0] = IWL_HCMD_DFL_NOCOPY; |
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ret = iwl_dvm_send_cmd(priv, &hcmd); |
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if (ret) { |
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IWL_ERR(priv, "Error %d on calib cmd %d\n", |
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ret, res->hdr.op_code); |
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return ret; |
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} |
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} |
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return 0; |
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} |
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int iwl_calib_set(struct iwl_priv *priv, |
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const struct iwl_calib_hdr *cmd, int len) |
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{ |
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struct iwl_calib_result *res, *tmp; |
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res = kmalloc(sizeof(*res) + len - sizeof(struct iwl_calib_hdr), |
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GFP_ATOMIC); |
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if (!res) |
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return -ENOMEM; |
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memcpy(&res->hdr, cmd, len); |
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res->cmd_len = len; |
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list_for_each_entry(tmp, &priv->calib_results, list) { |
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if (tmp->hdr.op_code == res->hdr.op_code) { |
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list_replace(&tmp->list, &res->list); |
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kfree(tmp); |
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return 0; |
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} |
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} |
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/* wasn't in list already */ |
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list_add_tail(&res->list, &priv->calib_results); |
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return 0; |
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} |
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void iwl_calib_free_results(struct iwl_priv *priv) |
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{ |
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struct iwl_calib_result *res, *tmp; |
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list_for_each_entry_safe(res, tmp, &priv->calib_results, list) { |
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list_del(&res->list); |
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kfree(res); |
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} |
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} |
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/***************************************************************************** |
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* RUNTIME calibrations framework |
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*****************************************************************************/ |
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/* "false alarms" are signals that our DSP tries to lock onto, |
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* but then determines that they are either noise, or transmissions |
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* from a distant wireless network (also "noise", really) that get |
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* "stepped on" by stronger transmissions within our own network. |
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* This algorithm attempts to set a sensitivity level that is high |
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* enough to receive all of our own network traffic, but not so |
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* high that our DSP gets too busy trying to lock onto non-network |
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* activity/noise. */ |
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static int iwl_sens_energy_cck(struct iwl_priv *priv, |
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u32 norm_fa, |
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u32 rx_enable_time, |
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struct statistics_general_data *rx_info) |
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{ |
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u32 max_nrg_cck = 0; |
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int i = 0; |
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u8 max_silence_rssi = 0; |
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u32 silence_ref = 0; |
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u8 silence_rssi_a = 0; |
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u8 silence_rssi_b = 0; |
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u8 silence_rssi_c = 0; |
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u32 val; |
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/* "false_alarms" values below are cross-multiplications to assess the |
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* numbers of false alarms within the measured period of actual Rx |
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* (Rx is off when we're txing), vs the min/max expected false alarms |
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* (some should be expected if rx is sensitive enough) in a |
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* hypothetical listening period of 200 time units (TU), 204.8 msec: |
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* |
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* MIN_FA/fixed-time < false_alarms/actual-rx-time < MAX_FA/beacon-time |
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* |
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* */ |
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u32 false_alarms = norm_fa * 200 * 1024; |
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u32 max_false_alarms = MAX_FA_CCK * rx_enable_time; |
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u32 min_false_alarms = MIN_FA_CCK * rx_enable_time; |
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struct iwl_sensitivity_data *data = NULL; |
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const struct iwl_sensitivity_ranges *ranges = priv->hw_params.sens; |
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data = &(priv->sensitivity_data); |
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data->nrg_auto_corr_silence_diff = 0; |
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/* Find max silence rssi among all 3 receivers. |
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* This is background noise, which may include transmissions from other |
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* networks, measured during silence before our network's beacon */ |
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silence_rssi_a = (u8)((rx_info->beacon_silence_rssi_a & |
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ALL_BAND_FILTER) >> 8); |
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silence_rssi_b = (u8)((rx_info->beacon_silence_rssi_b & |
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ALL_BAND_FILTER) >> 8); |
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silence_rssi_c = (u8)((rx_info->beacon_silence_rssi_c & |
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ALL_BAND_FILTER) >> 8); |
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val = max(silence_rssi_b, silence_rssi_c); |
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max_silence_rssi = max(silence_rssi_a, (u8) val); |
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/* Store silence rssi in 20-beacon history table */ |
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data->nrg_silence_rssi[data->nrg_silence_idx] = max_silence_rssi; |
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data->nrg_silence_idx++; |
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if (data->nrg_silence_idx >= NRG_NUM_PREV_STAT_L) |
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data->nrg_silence_idx = 0; |
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/* Find max silence rssi across 20 beacon history */ |
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for (i = 0; i < NRG_NUM_PREV_STAT_L; i++) { |
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val = data->nrg_silence_rssi[i]; |
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silence_ref = max(silence_ref, val); |
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} |
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IWL_DEBUG_CALIB(priv, "silence a %u, b %u, c %u, 20-bcn max %u\n", |
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silence_rssi_a, silence_rssi_b, silence_rssi_c, |
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silence_ref); |
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/* Find max rx energy (min value!) among all 3 receivers, |
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* measured during beacon frame. |
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* Save it in 10-beacon history table. */ |
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i = data->nrg_energy_idx; |
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val = min(rx_info->beacon_energy_b, rx_info->beacon_energy_c); |
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data->nrg_value[i] = min(rx_info->beacon_energy_a, val); |
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data->nrg_energy_idx++; |
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if (data->nrg_energy_idx >= 10) |
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data->nrg_energy_idx = 0; |
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/* Find min rx energy (max value) across 10 beacon history. |
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* This is the minimum signal level that we want to receive well. |
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* Add backoff (margin so we don't miss slightly lower energy frames). |
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* This establishes an upper bound (min value) for energy threshold. */ |
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max_nrg_cck = data->nrg_value[0]; |
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for (i = 1; i < 10; i++) |
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max_nrg_cck = (u32) max(max_nrg_cck, (data->nrg_value[i])); |
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max_nrg_cck += 6; |
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IWL_DEBUG_CALIB(priv, "rx energy a %u, b %u, c %u, 10-bcn max/min %u\n", |
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rx_info->beacon_energy_a, rx_info->beacon_energy_b, |
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rx_info->beacon_energy_c, max_nrg_cck - 6); |
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/* Count number of consecutive beacons with fewer-than-desired |
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* false alarms. */ |
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if (false_alarms < min_false_alarms) |
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data->num_in_cck_no_fa++; |
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else |
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data->num_in_cck_no_fa = 0; |
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IWL_DEBUG_CALIB(priv, "consecutive bcns with few false alarms = %u\n", |
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data->num_in_cck_no_fa); |
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/* If we got too many false alarms this time, reduce sensitivity */ |
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if ((false_alarms > max_false_alarms) && |
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(data->auto_corr_cck > AUTO_CORR_MAX_TH_CCK)) { |
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IWL_DEBUG_CALIB(priv, "norm FA %u > max FA %u\n", |
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false_alarms, max_false_alarms); |
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IWL_DEBUG_CALIB(priv, "... reducing sensitivity\n"); |
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data->nrg_curr_state = IWL_FA_TOO_MANY; |
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/* Store for "fewer than desired" on later beacon */ |
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data->nrg_silence_ref = silence_ref; |
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/* increase energy threshold (reduce nrg value) |
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* to decrease sensitivity */ |
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data->nrg_th_cck = data->nrg_th_cck - NRG_STEP_CCK; |
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/* Else if we got fewer than desired, increase sensitivity */ |
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} else if (false_alarms < min_false_alarms) { |
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data->nrg_curr_state = IWL_FA_TOO_FEW; |
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/* Compare silence level with silence level for most recent |
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* healthy number or too many false alarms */ |
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data->nrg_auto_corr_silence_diff = (s32)data->nrg_silence_ref - |
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(s32)silence_ref; |
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IWL_DEBUG_CALIB(priv, "norm FA %u < min FA %u, silence diff %d\n", |
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false_alarms, min_false_alarms, |
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data->nrg_auto_corr_silence_diff); |
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/* Increase value to increase sensitivity, but only if: |
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* 1a) previous beacon did *not* have *too many* false alarms |
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* 1b) AND there's a significant difference in Rx levels |
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* from a previous beacon with too many, or healthy # FAs |
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* OR 2) We've seen a lot of beacons (100) with too few |
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* false alarms */ |
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if ((data->nrg_prev_state != IWL_FA_TOO_MANY) && |
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((data->nrg_auto_corr_silence_diff > NRG_DIFF) || |
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(data->num_in_cck_no_fa > MAX_NUMBER_CCK_NO_FA))) { |
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IWL_DEBUG_CALIB(priv, "... increasing sensitivity\n"); |
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/* Increase nrg value to increase sensitivity */ |
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val = data->nrg_th_cck + NRG_STEP_CCK; |
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data->nrg_th_cck = min((u32)ranges->min_nrg_cck, val); |
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} else { |
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IWL_DEBUG_CALIB(priv, "... but not changing sensitivity\n"); |
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} |
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/* Else we got a healthy number of false alarms, keep status quo */ |
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} else { |
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IWL_DEBUG_CALIB(priv, " FA in safe zone\n"); |
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data->nrg_curr_state = IWL_FA_GOOD_RANGE; |
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/* Store for use in "fewer than desired" with later beacon */ |
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data->nrg_silence_ref = silence_ref; |
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/* If previous beacon had too many false alarms, |
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* give it some extra margin by reducing sensitivity again |
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* (but don't go below measured energy of desired Rx) */ |
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if (data->nrg_prev_state == IWL_FA_TOO_MANY) { |
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IWL_DEBUG_CALIB(priv, "... increasing margin\n"); |
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if (data->nrg_th_cck > (max_nrg_cck + NRG_MARGIN)) |
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data->nrg_th_cck -= NRG_MARGIN; |
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else |
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data->nrg_th_cck = max_nrg_cck; |
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} |
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} |
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/* Make sure the energy threshold does not go above the measured |
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* energy of the desired Rx signals (reduced by backoff margin), |
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* or else we might start missing Rx frames. |
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* Lower value is higher energy, so we use max()! |
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*/ |
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data->nrg_th_cck = max(max_nrg_cck, data->nrg_th_cck); |
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IWL_DEBUG_CALIB(priv, "new nrg_th_cck %u\n", data->nrg_th_cck); |
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data->nrg_prev_state = data->nrg_curr_state; |
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/* Auto-correlation CCK algorithm */ |
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if (false_alarms > min_false_alarms) { |
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/* increase auto_corr values to decrease sensitivity |
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* so the DSP won't be disturbed by the noise |
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*/ |
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if (data->auto_corr_cck < AUTO_CORR_MAX_TH_CCK) |
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data->auto_corr_cck = AUTO_CORR_MAX_TH_CCK + 1; |
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else { |
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val = data->auto_corr_cck + AUTO_CORR_STEP_CCK; |
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data->auto_corr_cck = |
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min((u32)ranges->auto_corr_max_cck, val); |
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} |
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val = data->auto_corr_cck_mrc + AUTO_CORR_STEP_CCK; |
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data->auto_corr_cck_mrc = |
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min((u32)ranges->auto_corr_max_cck_mrc, val); |
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} else if ((false_alarms < min_false_alarms) && |
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((data->nrg_auto_corr_silence_diff > NRG_DIFF) || |
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(data->num_in_cck_no_fa > MAX_NUMBER_CCK_NO_FA))) { |
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/* Decrease auto_corr values to increase sensitivity */ |
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val = data->auto_corr_cck - AUTO_CORR_STEP_CCK; |
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data->auto_corr_cck = |
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max((u32)ranges->auto_corr_min_cck, val); |
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val = data->auto_corr_cck_mrc - AUTO_CORR_STEP_CCK; |
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data->auto_corr_cck_mrc = |
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max((u32)ranges->auto_corr_min_cck_mrc, val); |
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} |
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return 0; |
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} |
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static int iwl_sens_auto_corr_ofdm(struct iwl_priv *priv, |
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u32 norm_fa, |
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u32 rx_enable_time) |
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{ |
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u32 val; |
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u32 false_alarms = norm_fa * 200 * 1024; |
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u32 max_false_alarms = MAX_FA_OFDM * rx_enable_time; |
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u32 min_false_alarms = MIN_FA_OFDM * rx_enable_time; |
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struct iwl_sensitivity_data *data = NULL; |
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const struct iwl_sensitivity_ranges *ranges = priv->hw_params.sens; |
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data = &(priv->sensitivity_data); |
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/* If we got too many false alarms this time, reduce sensitivity */ |
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if (false_alarms > max_false_alarms) { |
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IWL_DEBUG_CALIB(priv, "norm FA %u > max FA %u)\n", |
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false_alarms, max_false_alarms); |
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val = data->auto_corr_ofdm + AUTO_CORR_STEP_OFDM; |
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data->auto_corr_ofdm = |
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min((u32)ranges->auto_corr_max_ofdm, val); |
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val = data->auto_corr_ofdm_mrc + AUTO_CORR_STEP_OFDM; |
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data->auto_corr_ofdm_mrc = |
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min((u32)ranges->auto_corr_max_ofdm_mrc, val); |
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val = data->auto_corr_ofdm_x1 + AUTO_CORR_STEP_OFDM; |
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data->auto_corr_ofdm_x1 = |
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min((u32)ranges->auto_corr_max_ofdm_x1, val); |
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val = data->auto_corr_ofdm_mrc_x1 + AUTO_CORR_STEP_OFDM; |
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data->auto_corr_ofdm_mrc_x1 = |
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min((u32)ranges->auto_corr_max_ofdm_mrc_x1, val); |
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} |
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/* Else if we got fewer than desired, increase sensitivity */ |
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else if (false_alarms < min_false_alarms) { |
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IWL_DEBUG_CALIB(priv, "norm FA %u < min FA %u\n", |
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false_alarms, min_false_alarms); |
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val = data->auto_corr_ofdm - AUTO_CORR_STEP_OFDM; |
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data->auto_corr_ofdm = |
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max((u32)ranges->auto_corr_min_ofdm, val); |
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val = data->auto_corr_ofdm_mrc - AUTO_CORR_STEP_OFDM; |
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data->auto_corr_ofdm_mrc = |
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max((u32)ranges->auto_corr_min_ofdm_mrc, val); |
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val = data->auto_corr_ofdm_x1 - AUTO_CORR_STEP_OFDM; |
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data->auto_corr_ofdm_x1 = |
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max((u32)ranges->auto_corr_min_ofdm_x1, val); |
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val = data->auto_corr_ofdm_mrc_x1 - AUTO_CORR_STEP_OFDM; |
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data->auto_corr_ofdm_mrc_x1 = |
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max((u32)ranges->auto_corr_min_ofdm_mrc_x1, val); |
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} else { |
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IWL_DEBUG_CALIB(priv, "min FA %u < norm FA %u < max FA %u OK\n", |
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min_false_alarms, false_alarms, max_false_alarms); |
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} |
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return 0; |
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} |
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static void iwl_prepare_legacy_sensitivity_tbl(struct iwl_priv *priv, |
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struct iwl_sensitivity_data *data, |
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__le16 *tbl) |
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{ |
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tbl[HD_AUTO_CORR32_X4_TH_ADD_MIN_INDEX] = |
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cpu_to_le16((u16)data->auto_corr_ofdm); |
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tbl[HD_AUTO_CORR32_X4_TH_ADD_MIN_MRC_INDEX] = |
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cpu_to_le16((u16)data->auto_corr_ofdm_mrc); |
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tbl[HD_AUTO_CORR32_X1_TH_ADD_MIN_INDEX] = |
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cpu_to_le16((u16)data->auto_corr_ofdm_x1); |
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tbl[HD_AUTO_CORR32_X1_TH_ADD_MIN_MRC_INDEX] = |
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cpu_to_le16((u16)data->auto_corr_ofdm_mrc_x1); |
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|
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tbl[HD_AUTO_CORR40_X4_TH_ADD_MIN_INDEX] = |
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cpu_to_le16((u16)data->auto_corr_cck); |
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tbl[HD_AUTO_CORR40_X4_TH_ADD_MIN_MRC_INDEX] = |
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cpu_to_le16((u16)data->auto_corr_cck_mrc); |
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|
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tbl[HD_MIN_ENERGY_CCK_DET_INDEX] = |
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cpu_to_le16((u16)data->nrg_th_cck); |
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tbl[HD_MIN_ENERGY_OFDM_DET_INDEX] = |
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cpu_to_le16((u16)data->nrg_th_ofdm); |
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|
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tbl[HD_BARKER_CORR_TH_ADD_MIN_INDEX] = |
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cpu_to_le16(data->barker_corr_th_min); |
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tbl[HD_BARKER_CORR_TH_ADD_MIN_MRC_INDEX] = |
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cpu_to_le16(data->barker_corr_th_min_mrc); |
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tbl[HD_OFDM_ENERGY_TH_IN_INDEX] = |
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cpu_to_le16(data->nrg_th_cca); |
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|
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IWL_DEBUG_CALIB(priv, "ofdm: ac %u mrc %u x1 %u mrc_x1 %u thresh %u\n", |
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data->auto_corr_ofdm, data->auto_corr_ofdm_mrc, |
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data->auto_corr_ofdm_x1, data->auto_corr_ofdm_mrc_x1, |
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data->nrg_th_ofdm); |
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|
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IWL_DEBUG_CALIB(priv, "cck: ac %u mrc %u thresh %u\n", |
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data->auto_corr_cck, data->auto_corr_cck_mrc, |
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data->nrg_th_cck); |
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} |
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|
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/* Prepare a SENSITIVITY_CMD, send to uCode if values have changed */ |
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static int iwl_sensitivity_write(struct iwl_priv *priv) |
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{ |
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struct iwl_sensitivity_cmd cmd; |
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struct iwl_sensitivity_data *data = NULL; |
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struct iwl_host_cmd cmd_out = { |
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.id = SENSITIVITY_CMD, |
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.len = { sizeof(struct iwl_sensitivity_cmd), }, |
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.flags = CMD_ASYNC, |
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.data = { &cmd, }, |
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}; |
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|
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data = &(priv->sensitivity_data); |
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|
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memset(&cmd, 0, sizeof(cmd)); |
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|
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iwl_prepare_legacy_sensitivity_tbl(priv, data, &cmd.table[0]); |
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|
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/* Update uCode's "work" table, and copy it to DSP */ |
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cmd.control = SENSITIVITY_CMD_CONTROL_WORK_TABLE; |
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|
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/* Don't send command to uCode if nothing has changed */ |
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if (!memcmp(&cmd.table[0], &(priv->sensitivity_tbl[0]), |
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sizeof(u16)*HD_TABLE_SIZE)) { |
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IWL_DEBUG_CALIB(priv, "No change in SENSITIVITY_CMD\n"); |
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return 0; |
|
} |
|
|
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/* Copy table for comparison next time */ |
|
memcpy(&(priv->sensitivity_tbl[0]), &(cmd.table[0]), |
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sizeof(u16)*HD_TABLE_SIZE); |
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|
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return iwl_dvm_send_cmd(priv, &cmd_out); |
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} |
|
|
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/* Prepare a SENSITIVITY_CMD, send to uCode if values have changed */ |
|
static int iwl_enhance_sensitivity_write(struct iwl_priv *priv) |
|
{ |
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struct iwl_enhance_sensitivity_cmd cmd; |
|
struct iwl_sensitivity_data *data = NULL; |
|
struct iwl_host_cmd cmd_out = { |
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.id = SENSITIVITY_CMD, |
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.len = { sizeof(struct iwl_enhance_sensitivity_cmd), }, |
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.flags = CMD_ASYNC, |
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.data = { &cmd, }, |
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}; |
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|
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data = &(priv->sensitivity_data); |
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|
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memset(&cmd, 0, sizeof(cmd)); |
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|
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iwl_prepare_legacy_sensitivity_tbl(priv, data, &cmd.enhance_table[0]); |
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|
|
if (priv->lib->hd_v2) { |
|
cmd.enhance_table[HD_INA_NON_SQUARE_DET_OFDM_INDEX] = |
|
HD_INA_NON_SQUARE_DET_OFDM_DATA_V2; |
|
cmd.enhance_table[HD_INA_NON_SQUARE_DET_CCK_INDEX] = |
|
HD_INA_NON_SQUARE_DET_CCK_DATA_V2; |
|
cmd.enhance_table[HD_CORR_11_INSTEAD_OF_CORR_9_EN_INDEX] = |
|
HD_CORR_11_INSTEAD_OF_CORR_9_EN_DATA_V2; |
|
cmd.enhance_table[HD_OFDM_NON_SQUARE_DET_SLOPE_MRC_INDEX] = |
|
HD_OFDM_NON_SQUARE_DET_SLOPE_MRC_DATA_V2; |
|
cmd.enhance_table[HD_OFDM_NON_SQUARE_DET_INTERCEPT_MRC_INDEX] = |
|
HD_OFDM_NON_SQUARE_DET_INTERCEPT_MRC_DATA_V2; |
|
cmd.enhance_table[HD_OFDM_NON_SQUARE_DET_SLOPE_INDEX] = |
|
HD_OFDM_NON_SQUARE_DET_SLOPE_DATA_V2; |
|
cmd.enhance_table[HD_OFDM_NON_SQUARE_DET_INTERCEPT_INDEX] = |
|
HD_OFDM_NON_SQUARE_DET_INTERCEPT_DATA_V2; |
|
cmd.enhance_table[HD_CCK_NON_SQUARE_DET_SLOPE_MRC_INDEX] = |
|
HD_CCK_NON_SQUARE_DET_SLOPE_MRC_DATA_V2; |
|
cmd.enhance_table[HD_CCK_NON_SQUARE_DET_INTERCEPT_MRC_INDEX] = |
|
HD_CCK_NON_SQUARE_DET_INTERCEPT_MRC_DATA_V2; |
|
cmd.enhance_table[HD_CCK_NON_SQUARE_DET_SLOPE_INDEX] = |
|
HD_CCK_NON_SQUARE_DET_SLOPE_DATA_V2; |
|
cmd.enhance_table[HD_CCK_NON_SQUARE_DET_INTERCEPT_INDEX] = |
|
HD_CCK_NON_SQUARE_DET_INTERCEPT_DATA_V2; |
|
} else { |
|
cmd.enhance_table[HD_INA_NON_SQUARE_DET_OFDM_INDEX] = |
|
HD_INA_NON_SQUARE_DET_OFDM_DATA_V1; |
|
cmd.enhance_table[HD_INA_NON_SQUARE_DET_CCK_INDEX] = |
|
HD_INA_NON_SQUARE_DET_CCK_DATA_V1; |
|
cmd.enhance_table[HD_CORR_11_INSTEAD_OF_CORR_9_EN_INDEX] = |
|
HD_CORR_11_INSTEAD_OF_CORR_9_EN_DATA_V1; |
|
cmd.enhance_table[HD_OFDM_NON_SQUARE_DET_SLOPE_MRC_INDEX] = |
|
HD_OFDM_NON_SQUARE_DET_SLOPE_MRC_DATA_V1; |
|
cmd.enhance_table[HD_OFDM_NON_SQUARE_DET_INTERCEPT_MRC_INDEX] = |
|
HD_OFDM_NON_SQUARE_DET_INTERCEPT_MRC_DATA_V1; |
|
cmd.enhance_table[HD_OFDM_NON_SQUARE_DET_SLOPE_INDEX] = |
|
HD_OFDM_NON_SQUARE_DET_SLOPE_DATA_V1; |
|
cmd.enhance_table[HD_OFDM_NON_SQUARE_DET_INTERCEPT_INDEX] = |
|
HD_OFDM_NON_SQUARE_DET_INTERCEPT_DATA_V1; |
|
cmd.enhance_table[HD_CCK_NON_SQUARE_DET_SLOPE_MRC_INDEX] = |
|
HD_CCK_NON_SQUARE_DET_SLOPE_MRC_DATA_V1; |
|
cmd.enhance_table[HD_CCK_NON_SQUARE_DET_INTERCEPT_MRC_INDEX] = |
|
HD_CCK_NON_SQUARE_DET_INTERCEPT_MRC_DATA_V1; |
|
cmd.enhance_table[HD_CCK_NON_SQUARE_DET_SLOPE_INDEX] = |
|
HD_CCK_NON_SQUARE_DET_SLOPE_DATA_V1; |
|
cmd.enhance_table[HD_CCK_NON_SQUARE_DET_INTERCEPT_INDEX] = |
|
HD_CCK_NON_SQUARE_DET_INTERCEPT_DATA_V1; |
|
} |
|
|
|
/* 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.enhance_table[0], &(priv->sensitivity_tbl[0]), |
|
sizeof(u16)*HD_TABLE_SIZE) && |
|
!memcmp(&cmd.enhance_table[HD_INA_NON_SQUARE_DET_OFDM_INDEX], |
|
&(priv->enhance_sensitivity_tbl[0]), |
|
sizeof(u16)*ENHANCE_HD_TABLE_ENTRIES)) { |
|
IWL_DEBUG_CALIB(priv, "No change in SENSITIVITY_CMD\n"); |
|
return 0; |
|
} |
|
|
|
/* Copy table for comparison next time */ |
|
memcpy(&(priv->sensitivity_tbl[0]), &(cmd.enhance_table[0]), |
|
sizeof(u16)*HD_TABLE_SIZE); |
|
memcpy(&(priv->enhance_sensitivity_tbl[0]), |
|
&(cmd.enhance_table[HD_INA_NON_SQUARE_DET_OFDM_INDEX]), |
|
sizeof(u16)*ENHANCE_HD_TABLE_ENTRIES); |
|
|
|
return iwl_dvm_send_cmd(priv, &cmd_out); |
|
} |
|
|
|
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; |
|
|
|
if (priv->calib_disabled & IWL_SENSITIVITY_CALIB_DISABLED) |
|
return; |
|
|
|
IWL_DEBUG_CALIB(priv, "Start iwl_init_sensitivity\n"); |
|
|
|
/* Clear driver's sensitivity algo data */ |
|
data = &(priv->sensitivity_data); |
|
|
|
if (ranges == NULL) |
|
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 = 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; |
|
|
|
if (priv->fw->enhance_sensitivity_table) |
|
ret |= iwl_enhance_sensitivity_write(priv); |
|
else |
|
ret |= iwl_sensitivity_write(priv); |
|
IWL_DEBUG_CALIB(priv, "<<return 0x%X\n", ret); |
|
} |
|
|
|
void iwl_sensitivity_calibration(struct iwl_priv *priv) |
|
{ |
|
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; |
|
struct statistics_rx_phy *ofdm, *cck; |
|
struct statistics_general_data statis; |
|
|
|
if (priv->calib_disabled & IWL_SENSITIVITY_CALIB_DISABLED) |
|
return; |
|
|
|
data = &(priv->sensitivity_data); |
|
|
|
if (!iwl_is_any_associated(priv)) { |
|
IWL_DEBUG_CALIB(priv, "<< - not associated\n"); |
|
return; |
|
} |
|
|
|
spin_lock_bh(&priv->statistics.lock); |
|
rx_info = &priv->statistics.rx_non_phy; |
|
ofdm = &priv->statistics.rx_ofdm; |
|
cck = &priv->statistics.rx_cck; |
|
if (rx_info->interference_data_flag != INTERFERENCE_DATA_AVAILABLE) { |
|
IWL_DEBUG_CALIB(priv, "<< invalid data.\n"); |
|
spin_unlock_bh(&priv->statistics.lock); |
|
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_bh(&priv->statistics.lock); |
|
|
|
IWL_DEBUG_CALIB(priv, "rx_enable_time = %u usecs\n", rx_enable_time); |
|
|
|
if (!rx_enable_time) { |
|
IWL_DEBUG_CALIB(priv, "<< 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(priv, "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); |
|
if (priv->fw->enhance_sensitivity_table) |
|
iwl_enhance_sensitivity_write(priv); |
|
else |
|
iwl_sensitivity_write(priv); |
|
} |
|
|
|
static inline u8 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 iwl_find_disconn_antenna(struct iwl_priv *priv, u32* average_sig, |
|
struct iwl_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 / IWL_CAL_NUM_BEACONS; |
|
average_sig[1] = data->chain_signal_b / IWL_CAL_NUM_BEACONS; |
|
average_sig[2] = data->chain_signal_c / IWL_CAL_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); |
|
} |
|
|
|
IWL_DEBUG_CALIB(priv, "average_sig: a %d b %d c %d\n", |
|
average_sig[0], average_sig[1], average_sig[2]); |
|
IWL_DEBUG_CALIB(priv, "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(priv, "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 &= priv->nvm_data->valid_rx_ant; |
|
|
|
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->nvm_data->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]) { |
|
/* |
|
* If all chains are disconnected |
|
* connect the first valid tx chain |
|
*/ |
|
first_chain = |
|
find_first_chain(priv->nvm_data->valid_tx_ant); |
|
data->disconn_array[first_chain] = 0; |
|
active_chains |= BIT(first_chain); |
|
IWL_DEBUG_CALIB(priv, |
|
"All Tx chains are disconnected W/A - declare %d as connected\n", |
|
first_chain); |
|
break; |
|
} |
|
} |
|
|
|
if (active_chains != priv->nvm_data->valid_rx_ant && |
|
active_chains != priv->chain_noise_data.active_chains) |
|
IWL_DEBUG_CALIB(priv, |
|
"Detected that not all antennas are connected! " |
|
"Connected: %#x, valid: %#x.\n", |
|
active_chains, |
|
priv->nvm_data->valid_rx_ant); |
|
|
|
/* Save for use within RXON, TX, SCAN commands, etc. */ |
|
data->active_chains = active_chains; |
|
IWL_DEBUG_CALIB(priv, "active_chains (bitwise) = 0x%x\n", |
|
active_chains); |
|
} |
|
|
|
static void iwlagn_gain_computation(struct iwl_priv *priv, |
|
u32 average_noise[NUM_RX_CHAINS], |
|
u8 default_chain) |
|
{ |
|
int i; |
|
s32 delta_g; |
|
struct iwl_chain_noise_data *data = &priv->chain_noise_data; |
|
|
|
/* |
|
* Find Gain Code for the chains based on "default chain" |
|
*/ |
|
for (i = default_chain + 1; i < NUM_RX_CHAINS; i++) { |
|
if ((data->disconn_array[i])) { |
|
data->delta_gain_code[i] = 0; |
|
continue; |
|
} |
|
|
|
delta_g = (priv->lib->chain_noise_scale * |
|
((s32)average_noise[default_chain] - |
|
(s32)average_noise[i])) / 1500; |
|
|
|
/* bound gain by 2 bits value max, 3rd bit is sign */ |
|
data->delta_gain_code[i] = |
|
min(abs(delta_g), CHAIN_NOISE_MAX_DELTA_GAIN_CODE); |
|
|
|
if (delta_g < 0) |
|
/* |
|
* set negative sign ... |
|
* note to Intel developers: This is uCode API format, |
|
* not the format of any internal device registers. |
|
* Do not change this format for e.g. 6050 or similar |
|
* devices. Change format only if more resolution |
|
* (i.e. more than 2 bits magnitude) is needed. |
|
*/ |
|
data->delta_gain_code[i] |= (1 << 2); |
|
} |
|
|
|
IWL_DEBUG_CALIB(priv, "Delta gains: ANT_B = %d ANT_C = %d\n", |
|
data->delta_gain_code[1], data->delta_gain_code[2]); |
|
|
|
if (!data->radio_write) { |
|
struct iwl_calib_chain_noise_gain_cmd cmd; |
|
|
|
memset(&cmd, 0, sizeof(cmd)); |
|
|
|
iwl_set_calib_hdr(&cmd.hdr, |
|
priv->phy_calib_chain_noise_gain_cmd); |
|
cmd.delta_gain_1 = data->delta_gain_code[1]; |
|
cmd.delta_gain_2 = data->delta_gain_code[2]; |
|
iwl_dvm_send_cmd_pdu(priv, REPLY_PHY_CALIBRATION_CMD, |
|
CMD_ASYNC, sizeof(cmd), &cmd); |
|
|
|
data->radio_write = 1; |
|
data->state = IWL_CHAIN_NOISE_CALIBRATED; |
|
} |
|
} |
|
|
|
/* |
|
* Accumulate 16 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 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 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; |
|
struct statistics_rx_non_phy *rx_info; |
|
|
|
/* |
|
* MULTI-FIXME: |
|
* When we support multiple interfaces on different channels, |
|
* this must be modified/fixed. |
|
*/ |
|
struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS]; |
|
|
|
if (priv->calib_disabled & IWL_CHAIN_NOISE_CALIB_DISABLED) |
|
return; |
|
|
|
data = &(priv->chain_noise_data); |
|
|
|
/* |
|
* Accumulate just the first "chain_noise_num_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(priv, "Wait for noise calib reset\n"); |
|
return; |
|
} |
|
|
|
spin_lock_bh(&priv->statistics.lock); |
|
|
|
rx_info = &priv->statistics.rx_non_phy; |
|
|
|
if (rx_info->interference_data_flag != INTERFERENCE_DATA_AVAILABLE) { |
|
IWL_DEBUG_CALIB(priv, " << Interference data unavailable\n"); |
|
spin_unlock_bh(&priv->statistics.lock); |
|
return; |
|
} |
|
|
|
rxon_band24 = !!(ctx->staging.flags & RXON_FLG_BAND_24G_MSK); |
|
rxon_chnum = le16_to_cpu(ctx->staging.channel); |
|
stat_band24 = |
|
!!(priv->statistics.flag & STATISTICS_REPLY_FLG_BAND_24G_MSK); |
|
stat_chnum = le32_to_cpu(priv->statistics.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(priv, "Stats not from chan=%d, band24=%d\n", |
|
rxon_chnum, rxon_band24); |
|
spin_unlock_bh(&priv->statistics.lock); |
|
return; |
|
} |
|
|
|
/* |
|
* Accumulate beacon statistics 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_bh(&priv->statistics.lock); |
|
|
|
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(priv, "chan=%d, band24=%d, beacon=%d\n", |
|
rxon_chnum, rxon_band24, data->beacon_count); |
|
IWL_DEBUG_CALIB(priv, "chain_sig: a %d b %d c %d\n", |
|
chain_sig_a, chain_sig_b, chain_sig_c); |
|
IWL_DEBUG_CALIB(priv, "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 != IWL_CAL_NUM_BEACONS) |
|
return; |
|
|
|
/* Analyze signal for disconnected antenna */ |
|
if (priv->lib->bt_params && |
|
priv->lib->bt_params->advanced_bt_coexist) { |
|
/* Disable disconnected antenna algorithm for advanced |
|
bt coex, assuming valid antennas are connected */ |
|
data->active_chains = priv->nvm_data->valid_rx_ant; |
|
for (i = 0; i < NUM_RX_CHAINS; i++) |
|
if (!(data->active_chains & (1<<i))) |
|
data->disconn_array[i] = 1; |
|
} else |
|
iwl_find_disconn_antenna(priv, average_sig, data); |
|
|
|
/* Analyze noise for rx balance */ |
|
average_noise[0] = data->chain_noise_a / IWL_CAL_NUM_BEACONS; |
|
average_noise[1] = data->chain_noise_b / IWL_CAL_NUM_BEACONS; |
|
average_noise[2] = data->chain_noise_c / IWL_CAL_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; |
|
} |
|
} |
|
|
|
IWL_DEBUG_CALIB(priv, "average_noise: a %d b %d c %d\n", |
|
average_noise[0], average_noise[1], |
|
average_noise[2]); |
|
|
|
IWL_DEBUG_CALIB(priv, "min_average_noise = %d, antenna %d\n", |
|
min_average_noise, min_average_noise_antenna_i); |
|
|
|
iwlagn_gain_computation( |
|
priv, average_noise, |
|
find_first_chain(priv->nvm_data->valid_rx_ant)); |
|
|
|
/* Some power changes may have been made during the calibration. |
|
* Update and commit the RXON |
|
*/ |
|
iwl_update_chain_flags(priv); |
|
|
|
data->state = IWL_CHAIN_NOISE_DONE; |
|
iwl_power_update_mode(priv, false); |
|
} |
|
|
|
void iwl_reset_run_time_calib(struct iwl_priv *priv) |
|
{ |
|
int i; |
|
memset(&(priv->sensitivity_data), 0, |
|
sizeof(struct iwl_sensitivity_data)); |
|
memset(&(priv->chain_noise_data), 0, |
|
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; |
|
|
|
/* Ask for statistics now, the uCode will send notification |
|
* periodically after association */ |
|
iwl_send_statistics_request(priv, CMD_ASYNC, true); |
|
}
|
|
|