diff options
Diffstat (limited to 'drivers/net/wireless/ath/ath9k/antenna.c')
| -rw-r--r-- | drivers/net/wireless/ath/ath9k/antenna.c | 672 |
1 files changed, 372 insertions, 300 deletions
diff --git a/drivers/net/wireless/ath/ath9k/antenna.c b/drivers/net/wireless/ath/ath9k/antenna.c index 664844c5d3d5..dd1cc73d7946 100644 --- a/drivers/net/wireless/ath/ath9k/antenna.c +++ b/drivers/net/wireless/ath/ath9k/antenna.c @@ -16,37 +16,119 @@ #include "ath9k.h" -static inline bool ath_is_alt_ant_ratio_better(int alt_ratio, int maxdelta, +/* + * 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) { - return (((alt_ratio >= ATH_ANT_DIV_COMB_ALT_ANT_RATIO2) && - (alt_rssi_avg > main_rssi_avg + maxdelta)) || - (alt_rssi_avg > main_rssi_avg + mindelta)) && (pkt_count > 50); + 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(u8 div_group, int alt_ratio, - int curr_main_set, int curr_alt_set, - int alt_rssi_avg, int main_rssi_avg) +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 = false; - switch (div_group) { + 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 ((((curr_main_set == ATH_ANT_DIV_COMB_LNA2) && - (curr_alt_set == ATH_ANT_DIV_COMB_LNA1) && - (alt_rssi_avg >= (main_rssi_avg - 5))) || - ((curr_main_set == ATH_ANT_DIV_COMB_LNA1) && - (curr_alt_set == ATH_ANT_DIV_COMB_LNA2) && - (alt_rssi_avg >= (main_rssi_avg - 2)))) && - (alt_rssi_avg >= 4)) + 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; - else - result = false; + + 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; } @@ -108,6 +190,74 @@ static void ath_lnaconf_alt_good_scan(struct ath_ant_comb *antcomb, } } +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, @@ -129,7 +279,7 @@ static void ath_select_ant_div_from_quick_scan(struct ath_ant_comb *antcomb, if (antcomb->main_conf == ATH_ANT_DIV_COMB_LNA1) { /* main is LNA1 */ - if (ath_is_alt_ant_ratio_better(alt_ratio, + 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, @@ -138,7 +288,7 @@ static void ath_select_ant_div_from_quick_scan(struct ath_ant_comb *antcomb, else antcomb->first_ratio = false; } else if (antcomb->main_conf == ATH_ANT_DIV_COMB_LNA2) { - if (ath_is_alt_ant_ratio_better(alt_ratio, + 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, @@ -147,11 +297,11 @@ static void ath_select_ant_div_from_quick_scan(struct ath_ant_comb *antcomb, else antcomb->first_ratio = false; } else { - if ((((alt_ratio >= ATH_ANT_DIV_COMB_ALT_ANT_RATIO2) && - (alt_rssi_avg > main_rssi_avg + - ATH_ANT_DIV_COMB_LNA1_DELTA_HI)) || - (alt_rssi_avg > main_rssi_avg)) && - (antcomb->total_pkt_count > 50)) + 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; @@ -164,17 +314,21 @@ static void ath_select_ant_div_from_quick_scan(struct ath_ant_comb *antcomb, antcomb->rssi_first = main_rssi_avg; antcomb->rssi_third = alt_rssi_avg; - if (antcomb->second_quick_scan_conf == ATH_ANT_DIV_COMB_LNA1) + switch(antcomb->second_quick_scan_conf) { + case ATH_ANT_DIV_COMB_LNA1: antcomb->rssi_lna1 = alt_rssi_avg; - else if (antcomb->second_quick_scan_conf == - ATH_ANT_DIV_COMB_LNA2) + break; + case ATH_ANT_DIV_COMB_LNA2: antcomb->rssi_lna2 = alt_rssi_avg; - else if (antcomb->second_quick_scan_conf == - ATH_ANT_DIV_COMB_LNA1_PLUS_LNA2) { + 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 + @@ -184,7 +338,7 @@ static void ath_select_ant_div_from_quick_scan(struct ath_ant_comb *antcomb, 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(alt_ratio, + 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, @@ -193,7 +347,7 @@ static void ath_select_ant_div_from_quick_scan(struct ath_ant_comb *antcomb, else antcomb->second_ratio = false; } else if (antcomb->main_conf == ATH_ANT_DIV_COMB_LNA2) { - if (ath_is_alt_ant_ratio_better(alt_ratio, + 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, @@ -202,105 +356,18 @@ static void ath_select_ant_div_from_quick_scan(struct ath_ant_comb *antcomb, else antcomb->second_ratio = false; } else { - if ((((alt_ratio >= ATH_ANT_DIV_COMB_ALT_ANT_RATIO2) && - (alt_rssi_avg > main_rssi_avg + - ATH_ANT_DIV_COMB_LNA1_DELTA_HI)) || - (alt_rssi_avg > main_rssi_avg)) && - (antcomb->total_pkt_count > 50)) + 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; } - /* 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 (div_ant_conf->main_lna_conf == - ATH_ANT_DIV_COMB_LNA2) - div_ant_conf->alt_lna_conf = - ATH_ANT_DIV_COMB_LNA1; - else - div_ant_conf->alt_lna_conf = - ATH_ANT_DIV_COMB_LNA2; - else - /* Set alt to A+B or A-B */ - div_ant_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 (div_ant_conf->main_lna_conf == - ATH_ANT_DIV_COMB_LNA2) - div_ant_conf->alt_lna_conf = - ATH_ANT_DIV_COMB_LNA1; - else - div_ant_conf->alt_lna_conf = - ATH_ANT_DIV_COMB_LNA2; - } else { - /* Set alt to A+B or A-B */ - div_ant_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 (div_ant_conf->main_lna_conf == - ATH_ANT_DIV_COMB_LNA2) - div_ant_conf->alt_lna_conf = - ATH_ANT_DIV_COMB_LNA1; - else - div_ant_conf->alt_lna_conf = - ATH_ANT_DIV_COMB_LNA2; - else - /* Set alt to A+B or A-B */ - div_ant_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 (div_ant_conf->main_lna_conf == - ATH_ANT_DIV_COMB_LNA2) - div_ant_conf->alt_lna_conf = - ATH_ANT_DIV_COMB_LNA1; - else - div_ant_conf->alt_lna_conf = - ATH_ANT_DIV_COMB_LNA2; - else - /* Set alt to A+B or A-B */ - div_ant_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 (div_ant_conf->main_lna_conf == - ATH_ANT_DIV_COMB_LNA2) - div_ant_conf->alt_lna_conf = - ATH_ANT_DIV_COMB_LNA1; - else - div_ant_conf->alt_lna_conf = - ATH_ANT_DIV_COMB_LNA2; - else - /* Set alt to A+B or A-B */ - div_ant_conf->alt_lna_conf = antcomb->main_conf; - } + ath_ant_set_alt_ratio(antcomb, div_ant_conf); + break; default: break; @@ -430,8 +497,7 @@ static void ath_ant_div_conf_fast_divbias(struct ath_hw_antcomb_conf *ant_conf, ant_conf->fast_div_bias = 0x1; break; case 0x10: /* LNA2 A-B */ - if (!(antcomb->scan) && - (alt_ratio > ATH_ANT_DIV_COMB_ALT_ANT_RATIO)) + if (!antcomb->scan && (alt_ratio > antcomb->ant_ratio)) ant_conf->fast_div_bias = 0x1; else ant_conf->fast_div_bias = 0x2; @@ -440,15 +506,13 @@ static void ath_ant_div_conf_fast_divbias(struct ath_hw_antcomb_conf *ant_conf, ant_conf->fast_div_bias = 0x1; break; case 0x13: /* LNA2 A+B */ - if (!(antcomb->scan) && - (alt_ratio > ATH_ANT_DIV_COMB_ALT_ANT_RATIO)) + 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 > ATH_ANT_DIV_COMB_ALT_ANT_RATIO)) + if (!antcomb->scan && (alt_ratio > antcomb->ant_ratio)) ant_conf->fast_div_bias = 0x1; else ant_conf->fast_div_bias = 0x2; @@ -457,8 +521,7 @@ static void ath_ant_div_conf_fast_divbias(struct ath_hw_antcomb_conf *ant_conf, ant_conf->fast_div_bias = 0x1; break; case 0x23: /* LNA1 A+B */ - if (!(antcomb->scan) && - (alt_ratio > ATH_ANT_DIV_COMB_ALT_ANT_RATIO)) + if (!antcomb->scan && (alt_ratio > antcomb->ant_ratio)) ant_conf->fast_div_bias = 0x1; else ant_conf->fast_div_bias = 0x2; @@ -475,6 +538,9 @@ static void ath_ant_div_conf_fast_divbias(struct ath_hw_antcomb_conf *ant_conf, 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) { @@ -540,6 +606,138 @@ static void ath_ant_div_conf_fast_divbias(struct ath_hw_antcomb_conf *ant_conf, } } +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 + ATH_ANT_DIV_COMB_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; @@ -549,41 +747,46 @@ void ath_ant_comb_scan(struct ath_softc *sc, struct ath_rx_status *rs) int main_rssi = rs->rs_rssi_ctl0; int alt_rssi = rs->rs_rssi_ctl1; int rx_ant_conf, main_ant_conf; - bool short_scan = false; + bool short_scan = false, ret; rx_ant_conf = (rs->rs_rssi_ctl2 >> ATH_ANT_RX_CURRENT_SHIFT) & ATH_ANT_RX_MASK; main_ant_conf = (rs->rs_rssi_ctl2 >> 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++; } - /* Short scan check */ - if (antcomb->scan && antcomb->alt_good) { - if (time_after(jiffies, antcomb->scan_start_time + - msecs_to_jiffies(ATH_ANT_DIV_COMB_SHORT_SCAN_INTR))) - short_scan = true; - else - 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 < ATH_ANT_DIV_COMB_ALT_ANT_RATIO) - short_scan = true; - } + 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) + rs->rs_moreaggr) && !short_scan) return; if (antcomb->total_pkt_count) { @@ -595,15 +798,13 @@ void ath_ant_comb_scan(struct ath_softc *sc, struct ath_rx_status *rs) 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 > ATH_ANT_DIV_COMB_ALT_ANT_RATIO) { + if (alt_ratio > antcomb->ant_ratio) { ath_lnaconf_alt_good_scan(antcomb, div_ant_conf, main_rssi_avg); antcomb->alt_good = true; @@ -617,153 +818,47 @@ void ath_ant_comb_scan(struct ath_softc *sc, struct ath_rx_status *rs) } if (!antcomb->scan) { - if (ath_ant_div_comb_alt_check(div_ant_conf.div_group, - alt_ratio, curr_main_set, curr_alt_set, - 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; - } - - goto div_comb_done; - } 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; - - goto div_comb_done; - } - - if ((alt_rssi_avg < (main_rssi_avg + - div_ant_conf.lna1_lna2_delta))) + 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) { - 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 */ - div_ant_conf.main_lna_conf = - ATH_ANT_DIV_COMB_LNA1; - div_ant_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 */ - div_ant_conf.main_lna_conf = ATH_ANT_DIV_COMB_LNA2; - div_ant_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 */ - div_ant_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 + - ATH_ANT_DIV_COMB_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 */ - div_ant_conf.main_lna_conf = - ATH_ANT_DIV_COMB_LNA2; - div_ant_conf.alt_lna_conf = - ATH_ANT_DIV_COMB_LNA1_PLUS_LNA2; - } else if (antcomb->rssi_sub > - antcomb->rssi_lna1) { - /* set to A-B */ - div_ant_conf.main_lna_conf = - ATH_ANT_DIV_COMB_LNA2; - div_ant_conf.alt_lna_conf = - ATH_ANT_DIV_COMB_LNA1_MINUS_LNA2; - } else { - /* set to LNA1 */ - div_ant_conf.main_lna_conf = - ATH_ANT_DIV_COMB_LNA2; - div_ant_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 */ - div_ant_conf.main_lna_conf = - ATH_ANT_DIV_COMB_LNA1; - div_ant_conf.alt_lna_conf = - ATH_ANT_DIV_COMB_LNA1_PLUS_LNA2; - } else if (antcomb->rssi_sub > - antcomb->rssi_lna1) { - /* set to A-B */ - div_ant_conf.main_lna_conf = - ATH_ANT_DIV_COMB_LNA1; - div_ant_conf.alt_lna_conf = - ATH_ANT_DIV_COMB_LNA1_MINUS_LNA2; - } else { - /* set to LNA2 */ - div_ant_conf.main_lna_conf = - ATH_ANT_DIV_COMB_LNA1; - div_ant_conf.alt_lna_conf = - ATH_ANT_DIV_COMB_LNA2; - } - } - break; - default: - break; - } + 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; + ATH_ANT_DIV_COMB_LNA2; div_ant_conf.alt_lna_conf = - ATH_ANT_DIV_COMB_LNA1; + 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; + ATH_ANT_DIV_COMB_LNA1; div_ant_conf.alt_lna_conf = - ATH_ANT_DIV_COMB_LNA2; + 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++; } - 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; @@ -772,26 +867,3 @@ div_comb_done: antcomb->main_recv_cnt = 0; antcomb->alt_recv_cnt = 0; } - -void ath_ant_comb_update(struct ath_softc *sc) -{ - struct ath_hw *ah = sc->sc_ah; - struct ath_common *common = ath9k_hw_common(ah); - struct ath_hw_antcomb_conf div_ant_conf; - u8 lna_conf; - - ath9k_hw_antdiv_comb_conf_get(ah, &div_ant_conf); - - if (sc->ant_rx == 1) - lna_conf = ATH_ANT_DIV_COMB_LNA1; - else - lna_conf = ATH_ANT_DIV_COMB_LNA2; - - div_ant_conf.main_lna_conf = lna_conf; - div_ant_conf.alt_lna_conf = lna_conf; - - ath9k_hw_antdiv_comb_conf_set(ah, &div_ant_conf); - - if (common->antenna_diversity) - ath9k_hw_antctrl_shared_chain_lnadiv(ah, true); -} |