| /* |
| * Copyright (c) 2012 Qualcomm Atheros, Inc. |
| * |
| * Permission to use, copy, modify, and/or distribute this software for any |
| * purpose with or without fee is hereby granted, provided that the above |
| * copyright notice and this permission notice appear in all copies. |
| * |
| * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES |
| * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF |
| * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR |
| * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES |
| * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN |
| * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF |
| * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. |
| */ |
| |
| #include "ath9k.h" |
| |
| /* |
| * AR9285 |
| * ====== |
| * |
| * EEPROM has 2 4-bit fields containing the card configuration. |
| * |
| * antdiv_ctl1: |
| * ------------ |
| * bb_enable_ant_div_lnadiv : 1 |
| * bb_ant_div_alt_gaintb : 1 |
| * bb_ant_div_main_gaintb : 1 |
| * bb_enable_ant_fast_div : 1 |
| * |
| * antdiv_ctl2: |
| * ----------- |
| * bb_ant_div_alt_lnaconf : 2 |
| * bb_ant_div_main_lnaconf : 2 |
| * |
| * The EEPROM bits are used as follows: |
| * ------------------------------------ |
| * |
| * bb_enable_ant_div_lnadiv - Enable LNA path rx antenna diversity/combining. |
| * Set in AR_PHY_MULTICHAIN_GAIN_CTL. |
| * |
| * bb_ant_div_[alt/main]_gaintb - 0 -> Antenna config Alt/Main uses gaintable 0 |
| * 1 -> Antenna config Alt/Main uses gaintable 1 |
| * Set in AR_PHY_MULTICHAIN_GAIN_CTL. |
| * |
| * bb_enable_ant_fast_div - Enable fast antenna diversity. |
| * Set in AR_PHY_CCK_DETECT. |
| * |
| * bb_ant_div_[alt/main]_lnaconf - Alt/Main LNA diversity/combining input config. |
| * Set in AR_PHY_MULTICHAIN_GAIN_CTL. |
| * 10=LNA1 |
| * 01=LNA2 |
| * 11=LNA1+LNA2 |
| * 00=LNA1-LNA2 |
| * |
| * AR9485 / AR9565 / AR9331 |
| * ======================== |
| * |
| * The same bits are present in the EEPROM, but the location in the |
| * EEPROM is different (ant_div_control in ar9300_BaseExtension_1). |
| * |
| * ant_div_alt_lnaconf ==> bit 0~1 |
| * ant_div_main_lnaconf ==> bit 2~3 |
| * ant_div_alt_gaintb ==> bit 4 |
| * ant_div_main_gaintb ==> bit 5 |
| * enable_ant_div_lnadiv ==> bit 6 |
| * enable_ant_fast_div ==> bit 7 |
| */ |
| |
| static inline bool ath_is_alt_ant_ratio_better(struct ath_ant_comb *antcomb, |
| int alt_ratio, int maxdelta, |
| int mindelta, int main_rssi_avg, |
| int alt_rssi_avg, int pkt_count) |
| { |
| if (pkt_count <= 50) |
| return false; |
| |
| if (alt_rssi_avg > main_rssi_avg + mindelta) |
| return true; |
| |
| if (alt_ratio >= antcomb->ant_ratio2 && |
| alt_rssi_avg >= antcomb->low_rssi_thresh && |
| (alt_rssi_avg > main_rssi_avg + maxdelta)) |
| return true; |
| |
| return false; |
| } |
| |
| static inline bool ath_ant_div_comb_alt_check(struct ath_hw_antcomb_conf *conf, |
| struct ath_ant_comb *antcomb, |
| int alt_ratio, int alt_rssi_avg, |
| int main_rssi_avg) |
| { |
| bool result, set1, set2; |
| |
| result = set1 = set2 = false; |
| |
| if (conf->main_lna_conf == ATH_ANT_DIV_COMB_LNA2 && |
| conf->alt_lna_conf == ATH_ANT_DIV_COMB_LNA1) |
| set1 = true; |
| |
| if (conf->main_lna_conf == ATH_ANT_DIV_COMB_LNA1 && |
| conf->alt_lna_conf == ATH_ANT_DIV_COMB_LNA2) |
| set2 = true; |
| |
| switch (conf->div_group) { |
| case 0: |
| if (alt_ratio > ATH_ANT_DIV_COMB_ALT_ANT_RATIO) |
| result = true; |
| break; |
| case 1: |
| case 2: |
| if (alt_rssi_avg < 4 || alt_rssi_avg < antcomb->low_rssi_thresh) |
| break; |
| |
| if ((set1 && (alt_rssi_avg >= (main_rssi_avg - 5))) || |
| (set2 && (alt_rssi_avg >= (main_rssi_avg - 2))) || |
| (alt_ratio > antcomb->ant_ratio)) |
| result = true; |
| |
| break; |
| case 3: |
| if (alt_rssi_avg < 4 || alt_rssi_avg < antcomb->low_rssi_thresh) |
| break; |
| |
| if ((set1 && (alt_rssi_avg >= (main_rssi_avg - 3))) || |
| (set2 && (alt_rssi_avg >= (main_rssi_avg + 3))) || |
| (alt_ratio > antcomb->ant_ratio)) |
| result = true; |
| |
| break; |
| } |
| |
| return result; |
| } |
| |
| static void ath_lnaconf_alt_good_scan(struct ath_ant_comb *antcomb, |
| struct ath_hw_antcomb_conf ant_conf, |
| int main_rssi_avg) |
| { |
| antcomb->quick_scan_cnt = 0; |
| |
| if (ant_conf.main_lna_conf == ATH_ANT_DIV_COMB_LNA2) |
| antcomb->rssi_lna2 = main_rssi_avg; |
| else if (ant_conf.main_lna_conf == ATH_ANT_DIV_COMB_LNA1) |
| antcomb->rssi_lna1 = main_rssi_avg; |
| |
| switch ((ant_conf.main_lna_conf << 4) | ant_conf.alt_lna_conf) { |
| case 0x10: /* LNA2 A-B */ |
| antcomb->main_conf = ATH_ANT_DIV_COMB_LNA1_MINUS_LNA2; |
| antcomb->first_quick_scan_conf = |
| ATH_ANT_DIV_COMB_LNA1_PLUS_LNA2; |
| antcomb->second_quick_scan_conf = ATH_ANT_DIV_COMB_LNA1; |
| break; |
| case 0x20: /* LNA1 A-B */ |
| antcomb->main_conf = ATH_ANT_DIV_COMB_LNA1_MINUS_LNA2; |
| antcomb->first_quick_scan_conf = |
| ATH_ANT_DIV_COMB_LNA1_PLUS_LNA2; |
| antcomb->second_quick_scan_conf = ATH_ANT_DIV_COMB_LNA2; |
| break; |
| case 0x21: /* LNA1 LNA2 */ |
| antcomb->main_conf = ATH_ANT_DIV_COMB_LNA2; |
| antcomb->first_quick_scan_conf = |
| ATH_ANT_DIV_COMB_LNA1_MINUS_LNA2; |
| antcomb->second_quick_scan_conf = |
| ATH_ANT_DIV_COMB_LNA1_PLUS_LNA2; |
| break; |
| case 0x12: /* LNA2 LNA1 */ |
| antcomb->main_conf = ATH_ANT_DIV_COMB_LNA1; |
| antcomb->first_quick_scan_conf = |
| ATH_ANT_DIV_COMB_LNA1_MINUS_LNA2; |
| antcomb->second_quick_scan_conf = |
| ATH_ANT_DIV_COMB_LNA1_PLUS_LNA2; |
| break; |
| case 0x13: /* LNA2 A+B */ |
| antcomb->main_conf = ATH_ANT_DIV_COMB_LNA1_PLUS_LNA2; |
| antcomb->first_quick_scan_conf = |
| ATH_ANT_DIV_COMB_LNA1_MINUS_LNA2; |
| antcomb->second_quick_scan_conf = ATH_ANT_DIV_COMB_LNA1; |
| break; |
| case 0x23: /* LNA1 A+B */ |
| antcomb->main_conf = ATH_ANT_DIV_COMB_LNA1_PLUS_LNA2; |
| antcomb->first_quick_scan_conf = |
| ATH_ANT_DIV_COMB_LNA1_MINUS_LNA2; |
| antcomb->second_quick_scan_conf = ATH_ANT_DIV_COMB_LNA2; |
| break; |
| default: |
| break; |
| } |
| } |
| |
| static void ath_ant_set_alt_ratio(struct ath_ant_comb *antcomb, |
| struct ath_hw_antcomb_conf *conf) |
| { |
| /* set alt to the conf with maximun ratio */ |
| if (antcomb->first_ratio && antcomb->second_ratio) { |
| if (antcomb->rssi_second > antcomb->rssi_third) { |
| /* first alt*/ |
| if ((antcomb->first_quick_scan_conf == ATH_ANT_DIV_COMB_LNA1) || |
| (antcomb->first_quick_scan_conf == ATH_ANT_DIV_COMB_LNA2)) |
| /* Set alt LNA1 or LNA2*/ |
| if (conf->main_lna_conf == ATH_ANT_DIV_COMB_LNA2) |
| conf->alt_lna_conf = ATH_ANT_DIV_COMB_LNA1; |
| else |
| conf->alt_lna_conf = ATH_ANT_DIV_COMB_LNA2; |
| else |
| /* Set alt to A+B or A-B */ |
| conf->alt_lna_conf = |
| antcomb->first_quick_scan_conf; |
| } else if ((antcomb->second_quick_scan_conf == ATH_ANT_DIV_COMB_LNA1) || |
| (antcomb->second_quick_scan_conf == ATH_ANT_DIV_COMB_LNA2)) { |
| /* Set alt LNA1 or LNA2 */ |
| if (conf->main_lna_conf == ATH_ANT_DIV_COMB_LNA2) |
| conf->alt_lna_conf = ATH_ANT_DIV_COMB_LNA1; |
| else |
| conf->alt_lna_conf = ATH_ANT_DIV_COMB_LNA2; |
| } else { |
| /* Set alt to A+B or A-B */ |
| conf->alt_lna_conf = antcomb->second_quick_scan_conf; |
| } |
| } else if (antcomb->first_ratio) { |
| /* first alt */ |
| if ((antcomb->first_quick_scan_conf == ATH_ANT_DIV_COMB_LNA1) || |
| (antcomb->first_quick_scan_conf == ATH_ANT_DIV_COMB_LNA2)) |
| /* Set alt LNA1 or LNA2 */ |
| if (conf->main_lna_conf == ATH_ANT_DIV_COMB_LNA2) |
| conf->alt_lna_conf = ATH_ANT_DIV_COMB_LNA1; |
| else |
| conf->alt_lna_conf = ATH_ANT_DIV_COMB_LNA2; |
| else |
| /* Set alt to A+B or A-B */ |
| conf->alt_lna_conf = antcomb->first_quick_scan_conf; |
| } else if (antcomb->second_ratio) { |
| /* second alt */ |
| if ((antcomb->second_quick_scan_conf == ATH_ANT_DIV_COMB_LNA1) || |
| (antcomb->second_quick_scan_conf == ATH_ANT_DIV_COMB_LNA2)) |
| /* Set alt LNA1 or LNA2 */ |
| if (conf->main_lna_conf == ATH_ANT_DIV_COMB_LNA2) |
| conf->alt_lna_conf = ATH_ANT_DIV_COMB_LNA1; |
| else |
| conf->alt_lna_conf = ATH_ANT_DIV_COMB_LNA2; |
| else |
| /* Set alt to A+B or A-B */ |
| conf->alt_lna_conf = antcomb->second_quick_scan_conf; |
| } else { |
| /* main is largest */ |
| if ((antcomb->main_conf == ATH_ANT_DIV_COMB_LNA1) || |
| (antcomb->main_conf == ATH_ANT_DIV_COMB_LNA2)) |
| /* Set alt LNA1 or LNA2 */ |
| if (conf->main_lna_conf == ATH_ANT_DIV_COMB_LNA2) |
| conf->alt_lna_conf = ATH_ANT_DIV_COMB_LNA1; |
| else |
| conf->alt_lna_conf = ATH_ANT_DIV_COMB_LNA2; |
| else |
| /* Set alt to A+B or A-B */ |
| conf->alt_lna_conf = antcomb->main_conf; |
| } |
| } |
| |
| static void ath_select_ant_div_from_quick_scan(struct ath_ant_comb *antcomb, |
| struct ath_hw_antcomb_conf *div_ant_conf, |
| int main_rssi_avg, int alt_rssi_avg, |
| int alt_ratio) |
| { |
| /* alt_good */ |
| switch (antcomb->quick_scan_cnt) { |
| case 0: |
| /* set alt to main, and alt to first conf */ |
| div_ant_conf->main_lna_conf = antcomb->main_conf; |
| div_ant_conf->alt_lna_conf = antcomb->first_quick_scan_conf; |
| break; |
| case 1: |
| /* set alt to main, and alt to first conf */ |
| div_ant_conf->main_lna_conf = antcomb->main_conf; |
| div_ant_conf->alt_lna_conf = antcomb->second_quick_scan_conf; |
| antcomb->rssi_first = main_rssi_avg; |
| antcomb->rssi_second = alt_rssi_avg; |
| |
| if (antcomb->main_conf == ATH_ANT_DIV_COMB_LNA1) { |
| /* main is LNA1 */ |
| if (ath_is_alt_ant_ratio_better(antcomb, alt_ratio, |
| ATH_ANT_DIV_COMB_LNA1_DELTA_HI, |
| ATH_ANT_DIV_COMB_LNA1_DELTA_LOW, |
| main_rssi_avg, alt_rssi_avg, |
| antcomb->total_pkt_count)) |
| antcomb->first_ratio = true; |
| else |
| antcomb->first_ratio = false; |
| } else if (antcomb->main_conf == ATH_ANT_DIV_COMB_LNA2) { |
| if (ath_is_alt_ant_ratio_better(antcomb, alt_ratio, |
| ATH_ANT_DIV_COMB_LNA1_DELTA_MID, |
| ATH_ANT_DIV_COMB_LNA1_DELTA_LOW, |
| main_rssi_avg, alt_rssi_avg, |
| antcomb->total_pkt_count)) |
| antcomb->first_ratio = true; |
| else |
| antcomb->first_ratio = false; |
| } else { |
| if (ath_is_alt_ant_ratio_better(antcomb, alt_ratio, |
| ATH_ANT_DIV_COMB_LNA1_DELTA_HI, |
| 0, |
| main_rssi_avg, alt_rssi_avg, |
| antcomb->total_pkt_count)) |
| antcomb->first_ratio = true; |
| else |
| antcomb->first_ratio = false; |
| } |
| break; |
| case 2: |
| antcomb->alt_good = false; |
| antcomb->scan_not_start = false; |
| antcomb->scan = false; |
| antcomb->rssi_first = main_rssi_avg; |
| antcomb->rssi_third = alt_rssi_avg; |
| |
| switch(antcomb->second_quick_scan_conf) { |
| case ATH_ANT_DIV_COMB_LNA1: |
| antcomb->rssi_lna1 = alt_rssi_avg; |
| break; |
| case ATH_ANT_DIV_COMB_LNA2: |
| antcomb->rssi_lna2 = alt_rssi_avg; |
| break; |
| case ATH_ANT_DIV_COMB_LNA1_PLUS_LNA2: |
| if (antcomb->main_conf == ATH_ANT_DIV_COMB_LNA2) |
| antcomb->rssi_lna2 = main_rssi_avg; |
| else if (antcomb->main_conf == ATH_ANT_DIV_COMB_LNA1) |
| antcomb->rssi_lna1 = main_rssi_avg; |
| break; |
| default: |
| break; |
| } |
| |
| if (antcomb->rssi_lna2 > antcomb->rssi_lna1 + |
| div_ant_conf->lna1_lna2_switch_delta) |
| div_ant_conf->main_lna_conf = ATH_ANT_DIV_COMB_LNA2; |
| else |
| div_ant_conf->main_lna_conf = ATH_ANT_DIV_COMB_LNA1; |
| |
| if (antcomb->main_conf == ATH_ANT_DIV_COMB_LNA1) { |
| if (ath_is_alt_ant_ratio_better(antcomb, alt_ratio, |
| ATH_ANT_DIV_COMB_LNA1_DELTA_HI, |
| ATH_ANT_DIV_COMB_LNA1_DELTA_LOW, |
| main_rssi_avg, alt_rssi_avg, |
| antcomb->total_pkt_count)) |
| antcomb->second_ratio = true; |
| else |
| antcomb->second_ratio = false; |
| } else if (antcomb->main_conf == ATH_ANT_DIV_COMB_LNA2) { |
| if (ath_is_alt_ant_ratio_better(antcomb, alt_ratio, |
| ATH_ANT_DIV_COMB_LNA1_DELTA_MID, |
| ATH_ANT_DIV_COMB_LNA1_DELTA_LOW, |
| main_rssi_avg, alt_rssi_avg, |
| antcomb->total_pkt_count)) |
| antcomb->second_ratio = true; |
| else |
| antcomb->second_ratio = false; |
| } else { |
| if (ath_is_alt_ant_ratio_better(antcomb, alt_ratio, |
| ATH_ANT_DIV_COMB_LNA1_DELTA_HI, |
| 0, |
| main_rssi_avg, alt_rssi_avg, |
| antcomb->total_pkt_count)) |
| antcomb->second_ratio = true; |
| else |
| antcomb->second_ratio = false; |
| } |
| |
| ath_ant_set_alt_ratio(antcomb, div_ant_conf); |
| |
| break; |
| default: |
| break; |
| } |
| } |
| |
| static void ath_ant_div_conf_fast_divbias(struct ath_hw_antcomb_conf *ant_conf, |
| struct ath_ant_comb *antcomb, |
| int alt_ratio) |
| { |
| ant_conf->main_gaintb = 0; |
| ant_conf->alt_gaintb = 0; |
| |
| if (ant_conf->div_group == 0) { |
| /* Adjust the fast_div_bias based on main and alt lna conf */ |
| switch ((ant_conf->main_lna_conf << 4) | |
| ant_conf->alt_lna_conf) { |
| case 0x01: /* A-B LNA2 */ |
| ant_conf->fast_div_bias = 0x3b; |
| break; |
| case 0x02: /* A-B LNA1 */ |
| ant_conf->fast_div_bias = 0x3d; |
| break; |
| case 0x03: /* A-B A+B */ |
| ant_conf->fast_div_bias = 0x1; |
| break; |
| case 0x10: /* LNA2 A-B */ |
| ant_conf->fast_div_bias = 0x7; |
| break; |
| case 0x12: /* LNA2 LNA1 */ |
| ant_conf->fast_div_bias = 0x2; |
| break; |
| case 0x13: /* LNA2 A+B */ |
| ant_conf->fast_div_bias = 0x7; |
| break; |
| case 0x20: /* LNA1 A-B */ |
| ant_conf->fast_div_bias = 0x6; |
| break; |
| case 0x21: /* LNA1 LNA2 */ |
| ant_conf->fast_div_bias = 0x0; |
| break; |
| case 0x23: /* LNA1 A+B */ |
| ant_conf->fast_div_bias = 0x6; |
| break; |
| case 0x30: /* A+B A-B */ |
| ant_conf->fast_div_bias = 0x1; |
| break; |
| case 0x31: /* A+B LNA2 */ |
| ant_conf->fast_div_bias = 0x3b; |
| break; |
| case 0x32: /* A+B LNA1 */ |
| ant_conf->fast_div_bias = 0x3d; |
| break; |
| default: |
| break; |
| } |
| } else if (ant_conf->div_group == 1) { |
| /* Adjust the fast_div_bias based on main and alt_lna_conf */ |
| switch ((ant_conf->main_lna_conf << 4) | |
| ant_conf->alt_lna_conf) { |
| case 0x01: /* A-B LNA2 */ |
| ant_conf->fast_div_bias = 0x1; |
| break; |
| case 0x02: /* A-B LNA1 */ |
| ant_conf->fast_div_bias = 0x1; |
| break; |
| case 0x03: /* A-B A+B */ |
| ant_conf->fast_div_bias = 0x1; |
| break; |
| case 0x10: /* LNA2 A-B */ |
| if (!(antcomb->scan) && |
| (alt_ratio > ATH_ANT_DIV_COMB_ALT_ANT_RATIO)) |
| ant_conf->fast_div_bias = 0x3f; |
| else |
| ant_conf->fast_div_bias = 0x1; |
| break; |
| case 0x12: /* LNA2 LNA1 */ |
| ant_conf->fast_div_bias = 0x1; |
| break; |
| case 0x13: /* LNA2 A+B */ |
| if (!(antcomb->scan) && |
| (alt_ratio > ATH_ANT_DIV_COMB_ALT_ANT_RATIO)) |
| ant_conf->fast_div_bias = 0x3f; |
| else |
| ant_conf->fast_div_bias = 0x1; |
| break; |
| case 0x20: /* LNA1 A-B */ |
| if (!(antcomb->scan) && |
| (alt_ratio > ATH_ANT_DIV_COMB_ALT_ANT_RATIO)) |
| ant_conf->fast_div_bias = 0x3f; |
| else |
| ant_conf->fast_div_bias = 0x1; |
| break; |
| case 0x21: /* LNA1 LNA2 */ |
| ant_conf->fast_div_bias = 0x1; |
| break; |
| case 0x23: /* LNA1 A+B */ |
| if (!(antcomb->scan) && |
| (alt_ratio > ATH_ANT_DIV_COMB_ALT_ANT_RATIO)) |
| ant_conf->fast_div_bias = 0x3f; |
| else |
| ant_conf->fast_div_bias = 0x1; |
| break; |
| case 0x30: /* A+B A-B */ |
| ant_conf->fast_div_bias = 0x1; |
| break; |
| case 0x31: /* A+B LNA2 */ |
| ant_conf->fast_div_bias = 0x1; |
| break; |
| case 0x32: /* A+B LNA1 */ |
| ant_conf->fast_div_bias = 0x1; |
| break; |
| default: |
| break; |
| } |
| } else if (ant_conf->div_group == 2) { |
| /* Adjust the fast_div_bias based on main and alt_lna_conf */ |
| switch ((ant_conf->main_lna_conf << 4) | |
| ant_conf->alt_lna_conf) { |
| case 0x01: /* A-B LNA2 */ |
| ant_conf->fast_div_bias = 0x1; |
| break; |
| case 0x02: /* A-B LNA1 */ |
| ant_conf->fast_div_bias = 0x1; |
| break; |
| case 0x03: /* A-B A+B */ |
| ant_conf->fast_div_bias = 0x1; |
| break; |
| case 0x10: /* LNA2 A-B */ |
| if (!antcomb->scan && (alt_ratio > antcomb->ant_ratio)) |
| ant_conf->fast_div_bias = 0x1; |
| else |
| ant_conf->fast_div_bias = 0x2; |
| break; |
| case 0x12: /* LNA2 LNA1 */ |
| ant_conf->fast_div_bias = 0x1; |
| break; |
| case 0x13: /* LNA2 A+B */ |
| if (!antcomb->scan && (alt_ratio > antcomb->ant_ratio)) |
| ant_conf->fast_div_bias = 0x1; |
| else |
| ant_conf->fast_div_bias = 0x2; |
| break; |
| case 0x20: /* LNA1 A-B */ |
| if (!antcomb->scan && (alt_ratio > antcomb->ant_ratio)) |
| ant_conf->fast_div_bias = 0x1; |
| else |
| ant_conf->fast_div_bias = 0x2; |
| break; |
| case 0x21: /* LNA1 LNA2 */ |
| ant_conf->fast_div_bias = 0x1; |
| break; |
| case 0x23: /* LNA1 A+B */ |
| if (!antcomb->scan && (alt_ratio > antcomb->ant_ratio)) |
| ant_conf->fast_div_bias = 0x1; |
| else |
| ant_conf->fast_div_bias = 0x2; |
| break; |
| case 0x30: /* A+B A-B */ |
| ant_conf->fast_div_bias = 0x1; |
| break; |
| case 0x31: /* A+B LNA2 */ |
| ant_conf->fast_div_bias = 0x1; |
| break; |
| case 0x32: /* A+B LNA1 */ |
| ant_conf->fast_div_bias = 0x1; |
| break; |
| default: |
| break; |
| } |
| |
| if (antcomb->fast_div_bias) |
| ant_conf->fast_div_bias = antcomb->fast_div_bias; |
| } else if (ant_conf->div_group == 3) { |
| switch ((ant_conf->main_lna_conf << 4) | |
| ant_conf->alt_lna_conf) { |
| case 0x01: /* A-B LNA2 */ |
| ant_conf->fast_div_bias = 0x1; |
| break; |
| case 0x02: /* A-B LNA1 */ |
| ant_conf->fast_div_bias = 0x39; |
| break; |
| case 0x03: /* A-B A+B */ |
| ant_conf->fast_div_bias = 0x1; |
| break; |
| case 0x10: /* LNA2 A-B */ |
| ant_conf->fast_div_bias = 0x2; |
| break; |
| case 0x12: /* LNA2 LNA1 */ |
| ant_conf->fast_div_bias = 0x3f; |
| break; |
| case 0x13: /* LNA2 A+B */ |
| ant_conf->fast_div_bias = 0x2; |
| break; |
| case 0x20: /* LNA1 A-B */ |
| ant_conf->fast_div_bias = 0x3; |
| break; |
| case 0x21: /* LNA1 LNA2 */ |
| ant_conf->fast_div_bias = 0x3; |
| break; |
| case 0x23: /* LNA1 A+B */ |
| ant_conf->fast_div_bias = 0x3; |
| break; |
| case 0x30: /* A+B A-B */ |
| ant_conf->fast_div_bias = 0x1; |
| break; |
| case 0x31: /* A+B LNA2 */ |
| ant_conf->fast_div_bias = 0x6; |
| break; |
| case 0x32: /* A+B LNA1 */ |
| ant_conf->fast_div_bias = 0x1; |
| break; |
| default: |
| break; |
| } |
| } |
| } |
| |
| static void ath_ant_try_scan(struct ath_ant_comb *antcomb, |
| struct ath_hw_antcomb_conf *conf, |
| int curr_alt_set, int alt_rssi_avg, |
| int main_rssi_avg) |
| { |
| switch (curr_alt_set) { |
| case ATH_ANT_DIV_COMB_LNA2: |
| antcomb->rssi_lna2 = alt_rssi_avg; |
| antcomb->rssi_lna1 = main_rssi_avg; |
| antcomb->scan = true; |
| /* set to A+B */ |
| conf->main_lna_conf = ATH_ANT_DIV_COMB_LNA1; |
| conf->alt_lna_conf = ATH_ANT_DIV_COMB_LNA1_PLUS_LNA2; |
| break; |
| case ATH_ANT_DIV_COMB_LNA1: |
| antcomb->rssi_lna1 = alt_rssi_avg; |
| antcomb->rssi_lna2 = main_rssi_avg; |
| antcomb->scan = true; |
| /* set to A+B */ |
| conf->main_lna_conf = ATH_ANT_DIV_COMB_LNA2; |
| conf->alt_lna_conf = ATH_ANT_DIV_COMB_LNA1_PLUS_LNA2; |
| break; |
| case ATH_ANT_DIV_COMB_LNA1_PLUS_LNA2: |
| antcomb->rssi_add = alt_rssi_avg; |
| antcomb->scan = true; |
| /* set to A-B */ |
| conf->alt_lna_conf = ATH_ANT_DIV_COMB_LNA1_MINUS_LNA2; |
| break; |
| case ATH_ANT_DIV_COMB_LNA1_MINUS_LNA2: |
| antcomb->rssi_sub = alt_rssi_avg; |
| antcomb->scan = false; |
| if (antcomb->rssi_lna2 > |
| (antcomb->rssi_lna1 + conf->lna1_lna2_switch_delta)) { |
| /* use LNA2 as main LNA */ |
| if ((antcomb->rssi_add > antcomb->rssi_lna1) && |
| (antcomb->rssi_add > antcomb->rssi_sub)) { |
| /* set to A+B */ |
| conf->main_lna_conf = ATH_ANT_DIV_COMB_LNA2; |
| conf->alt_lna_conf = ATH_ANT_DIV_COMB_LNA1_PLUS_LNA2; |
| } else if (antcomb->rssi_sub > |
| antcomb->rssi_lna1) { |
| /* set to A-B */ |
| conf->main_lna_conf = ATH_ANT_DIV_COMB_LNA2; |
| conf->alt_lna_conf = ATH_ANT_DIV_COMB_LNA1_MINUS_LNA2; |
| } else { |
| /* set to LNA1 */ |
| conf->main_lna_conf = ATH_ANT_DIV_COMB_LNA2; |
| conf->alt_lna_conf = ATH_ANT_DIV_COMB_LNA1; |
| } |
| } else { |
| /* use LNA1 as main LNA */ |
| if ((antcomb->rssi_add > antcomb->rssi_lna2) && |
| (antcomb->rssi_add > antcomb->rssi_sub)) { |
| /* set to A+B */ |
| conf->main_lna_conf = ATH_ANT_DIV_COMB_LNA1; |
| conf->alt_lna_conf = ATH_ANT_DIV_COMB_LNA1_PLUS_LNA2; |
| } else if (antcomb->rssi_sub > |
| antcomb->rssi_lna1) { |
| /* set to A-B */ |
| conf->main_lna_conf = ATH_ANT_DIV_COMB_LNA1; |
| conf->alt_lna_conf = ATH_ANT_DIV_COMB_LNA1_MINUS_LNA2; |
| } else { |
| /* set to LNA2 */ |
| conf->main_lna_conf = ATH_ANT_DIV_COMB_LNA1; |
| conf->alt_lna_conf = ATH_ANT_DIV_COMB_LNA2; |
| } |
| } |
| break; |
| default: |
| break; |
| } |
| } |
| |
| static bool ath_ant_try_switch(struct ath_hw_antcomb_conf *div_ant_conf, |
| struct ath_ant_comb *antcomb, |
| int alt_ratio, int alt_rssi_avg, |
| int main_rssi_avg, int curr_main_set, |
| int curr_alt_set) |
| { |
| bool ret = false; |
| |
| if (ath_ant_div_comb_alt_check(div_ant_conf, antcomb, alt_ratio, |
| alt_rssi_avg, main_rssi_avg)) { |
| if (curr_alt_set == ATH_ANT_DIV_COMB_LNA2) { |
| /* |
| * Switch main and alt LNA. |
| */ |
| div_ant_conf->main_lna_conf = ATH_ANT_DIV_COMB_LNA2; |
| div_ant_conf->alt_lna_conf = ATH_ANT_DIV_COMB_LNA1; |
| } else if (curr_alt_set == ATH_ANT_DIV_COMB_LNA1) { |
| div_ant_conf->main_lna_conf = ATH_ANT_DIV_COMB_LNA1; |
| div_ant_conf->alt_lna_conf = ATH_ANT_DIV_COMB_LNA2; |
| } |
| |
| ret = true; |
| } else if ((curr_alt_set != ATH_ANT_DIV_COMB_LNA1) && |
| (curr_alt_set != ATH_ANT_DIV_COMB_LNA2)) { |
| /* |
| Set alt to another LNA. |
| */ |
| if (curr_main_set == ATH_ANT_DIV_COMB_LNA2) |
| div_ant_conf->alt_lna_conf = ATH_ANT_DIV_COMB_LNA1; |
| else if (curr_main_set == ATH_ANT_DIV_COMB_LNA1) |
| div_ant_conf->alt_lna_conf = ATH_ANT_DIV_COMB_LNA2; |
| |
| ret = true; |
| } |
| |
| return ret; |
| } |
| |
| static bool ath_ant_short_scan_check(struct ath_ant_comb *antcomb) |
| { |
| int alt_ratio; |
| |
| if (!antcomb->scan || !antcomb->alt_good) |
| return false; |
| |
| if (time_after(jiffies, antcomb->scan_start_time + |
| msecs_to_jiffies(ATH_ANT_DIV_COMB_SHORT_SCAN_INTR))) |
| return true; |
| |
| if (antcomb->total_pkt_count == ATH_ANT_DIV_COMB_SHORT_SCAN_PKTCOUNT) { |
| alt_ratio = ((antcomb->alt_recv_cnt * 100) / |
| antcomb->total_pkt_count); |
| if (alt_ratio < antcomb->ant_ratio) |
| return true; |
| } |
| |
| return false; |
| } |
| |
| void ath_ant_comb_scan(struct ath_softc *sc, struct ath_rx_status *rs) |
| { |
| struct ath_hw_antcomb_conf div_ant_conf; |
| struct ath_ant_comb *antcomb = &sc->ant_comb; |
| int alt_ratio = 0, alt_rssi_avg = 0, main_rssi_avg = 0, curr_alt_set; |
| int curr_main_set; |
| int main_rssi = rs->rs_rssi_ctl[0]; |
| int alt_rssi = rs->rs_rssi_ctl[1]; |
| int rx_ant_conf, main_ant_conf; |
| bool short_scan = false, ret; |
| |
| rx_ant_conf = (rs->rs_rssi_ctl[2] >> ATH_ANT_RX_CURRENT_SHIFT) & |
| ATH_ANT_RX_MASK; |
| main_ant_conf = (rs->rs_rssi_ctl[2] >> ATH_ANT_RX_MAIN_SHIFT) & |
| ATH_ANT_RX_MASK; |
| |
| if (alt_rssi >= antcomb->low_rssi_thresh) { |
| antcomb->ant_ratio = ATH_ANT_DIV_COMB_ALT_ANT_RATIO; |
| antcomb->ant_ratio2 = ATH_ANT_DIV_COMB_ALT_ANT_RATIO2; |
| } else { |
| antcomb->ant_ratio = ATH_ANT_DIV_COMB_ALT_ANT_RATIO_LOW_RSSI; |
| antcomb->ant_ratio2 = ATH_ANT_DIV_COMB_ALT_ANT_RATIO2_LOW_RSSI; |
| } |
| |
| /* Record packet only when both main_rssi and alt_rssi is positive */ |
| if (main_rssi > 0 && alt_rssi > 0) { |
| antcomb->total_pkt_count++; |
| antcomb->main_total_rssi += main_rssi; |
| antcomb->alt_total_rssi += alt_rssi; |
| |
| if (main_ant_conf == rx_ant_conf) |
| antcomb->main_recv_cnt++; |
| else |
| antcomb->alt_recv_cnt++; |
| } |
| |
| if (main_ant_conf == rx_ant_conf) { |
| ANT_STAT_INC(ANT_MAIN, recv_cnt); |
| ANT_LNA_INC(ANT_MAIN, rx_ant_conf); |
| } else { |
| ANT_STAT_INC(ANT_ALT, recv_cnt); |
| ANT_LNA_INC(ANT_ALT, rx_ant_conf); |
| } |
| |
| /* Short scan check */ |
| short_scan = ath_ant_short_scan_check(antcomb); |
| |
| if (((antcomb->total_pkt_count < ATH_ANT_DIV_COMB_MAX_PKTCOUNT) || |
| rs->rs_moreaggr) && !short_scan) |
| return; |
| |
| if (antcomb->total_pkt_count) { |
| alt_ratio = ((antcomb->alt_recv_cnt * 100) / |
| antcomb->total_pkt_count); |
| main_rssi_avg = (antcomb->main_total_rssi / |
| antcomb->total_pkt_count); |
| alt_rssi_avg = (antcomb->alt_total_rssi / |
| antcomb->total_pkt_count); |
| } |
| |
| ath9k_hw_antdiv_comb_conf_get(sc->sc_ah, &div_ant_conf); |
| curr_alt_set = div_ant_conf.alt_lna_conf; |
| curr_main_set = div_ant_conf.main_lna_conf; |
| antcomb->count++; |
| |
| if (antcomb->count == ATH_ANT_DIV_COMB_MAX_COUNT) { |
| if (alt_ratio > antcomb->ant_ratio) { |
| ath_lnaconf_alt_good_scan(antcomb, div_ant_conf, |
| main_rssi_avg); |
| antcomb->alt_good = true; |
| } else { |
| antcomb->alt_good = false; |
| } |
| |
| antcomb->count = 0; |
| antcomb->scan = true; |
| antcomb->scan_not_start = true; |
| } |
| |
| if (!antcomb->scan) { |
| ret = ath_ant_try_switch(&div_ant_conf, antcomb, alt_ratio, |
| alt_rssi_avg, main_rssi_avg, |
| curr_main_set, curr_alt_set); |
| if (ret) |
| goto div_comb_done; |
| } |
| |
| if (!antcomb->scan && |
| (alt_rssi_avg < (main_rssi_avg + div_ant_conf.lna1_lna2_delta))) |
| goto div_comb_done; |
| |
| if (!antcomb->scan_not_start) { |
| ath_ant_try_scan(antcomb, &div_ant_conf, curr_alt_set, |
| alt_rssi_avg, main_rssi_avg); |
| } else { |
| if (!antcomb->alt_good) { |
| antcomb->scan_not_start = false; |
| /* Set alt to another LNA */ |
| if (curr_main_set == ATH_ANT_DIV_COMB_LNA2) { |
| div_ant_conf.main_lna_conf = |
| ATH_ANT_DIV_COMB_LNA2; |
| div_ant_conf.alt_lna_conf = |
| ATH_ANT_DIV_COMB_LNA1; |
| } else if (curr_main_set == ATH_ANT_DIV_COMB_LNA1) { |
| div_ant_conf.main_lna_conf = |
| ATH_ANT_DIV_COMB_LNA1; |
| div_ant_conf.alt_lna_conf = |
| ATH_ANT_DIV_COMB_LNA2; |
| } |
| goto div_comb_done; |
| } |
| ath_select_ant_div_from_quick_scan(antcomb, &div_ant_conf, |
| main_rssi_avg, alt_rssi_avg, |
| alt_ratio); |
| antcomb->quick_scan_cnt++; |
| } |
| |
| div_comb_done: |
| ath_ant_div_conf_fast_divbias(&div_ant_conf, antcomb, alt_ratio); |
| ath9k_hw_antdiv_comb_conf_set(sc->sc_ah, &div_ant_conf); |
| ath9k_debug_stat_ant(sc, &div_ant_conf, main_rssi_avg, alt_rssi_avg); |
| |
| antcomb->scan_start_time = jiffies; |
| antcomb->total_pkt_count = 0; |
| antcomb->main_total_rssi = 0; |
| antcomb->alt_total_rssi = 0; |
| antcomb->main_recv_cnt = 0; |
| antcomb->alt_recv_cnt = 0; |
| } |
