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ath9k: Use a subroutine to try LNA switch 

Signed-off-by: Sujith Manoharan <c_manoha@qca.qualcomm.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
This commit is contained in:
Sujith Manoharan 2013-08-01 11:53:20 +05:30 committed by John W. Linville
parent 552bde40dd
commit ef999114ee
1 changed files with 52 additions and 40 deletions
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92
drivers/net/wireless/ath/ath9k/antenna.c
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@ -25,7 +25,7 @@ static inline bool ath_is_alt_ant_ratio_better(int alt_ratio, int maxdelta,
(alt_rssi_avg > main_rssi_avg + mindelta)) && (pkt_count > 50); (alt_rssi_avg > main_rssi_avg + mindelta)) && (pkt_count > 50);
} }
static inline bool ath_ant_div_comb_alt_check(struct ath_hw_antcomb_conf conf, static inline bool ath_ant_div_comb_alt_check(struct ath_hw_antcomb_conf *conf,
int alt_ratio, int alt_rssi_avg, int alt_ratio, int alt_rssi_avg,
int main_rssi_avg) int main_rssi_avg)
{ {
@ -33,15 +33,15 @@ static inline bool ath_ant_div_comb_alt_check(struct ath_hw_antcomb_conf conf,
result = set1 = set2 = false; result = set1 = set2 = false;
if (conf.main_lna_conf == ATH_ANT_DIV_COMB_LNA2 && if (conf->main_lna_conf == ATH_ANT_DIV_COMB_LNA2 &&
conf.alt_lna_conf == ATH_ANT_DIV_COMB_LNA1) conf->alt_lna_conf == ATH_ANT_DIV_COMB_LNA1)
set1 = true; set1 = true;
if (conf.main_lna_conf == ATH_ANT_DIV_COMB_LNA1 && if (conf->main_lna_conf == ATH_ANT_DIV_COMB_LNA1 &&
conf.alt_lna_conf == ATH_ANT_DIV_COMB_LNA2) conf->alt_lna_conf == ATH_ANT_DIV_COMB_LNA2)
set2 = true; set2 = true;
switch (conf.div_group) { switch (conf->div_group) {
case 0: case 0:
if (alt_ratio > ATH_ANT_DIV_COMB_ALT_ANT_RATIO) if (alt_ratio > ATH_ANT_DIV_COMB_ALT_ANT_RATIO)
result = true; result = true;
@ -557,6 +557,43 @@ static void ath_ant_div_conf_fast_divbias(struct ath_hw_antcomb_conf *ant_conf,
} }
} }
static bool ath_ant_try_switch(struct ath_hw_antcomb_conf *div_ant_conf,
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, 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) static bool ath_ant_short_scan_check(struct ath_ant_comb *antcomb)
{ {
int alt_ratio; int alt_ratio;
@ -587,7 +624,7 @@ void ath_ant_comb_scan(struct ath_softc *sc, struct ath_rx_status *rs)
int main_rssi = rs->rs_rssi_ctl0; int main_rssi = rs->rs_rssi_ctl0;
int alt_rssi = rs->rs_rssi_ctl1; int alt_rssi = rs->rs_rssi_ctl1;
int rx_ant_conf, main_ant_conf; 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) & rx_ant_conf = (rs->rs_rssi_ctl2 >> ATH_ANT_RX_CURRENT_SHIFT) &
ATH_ANT_RX_MASK; ATH_ANT_RX_MASK;
@ -627,11 +664,9 @@ void ath_ant_comb_scan(struct ath_softc *sc, struct ath_rx_status *rs)
antcomb->total_pkt_count); antcomb->total_pkt_count);
} }
ath9k_hw_antdiv_comb_conf_get(sc->sc_ah, &div_ant_conf); ath9k_hw_antdiv_comb_conf_get(sc->sc_ah, &div_ant_conf);
curr_alt_set = div_ant_conf.alt_lna_conf; curr_alt_set = div_ant_conf.alt_lna_conf;
curr_main_set = div_ant_conf.main_lna_conf; curr_main_set = div_ant_conf.main_lna_conf;
antcomb->count++; antcomb->count++;
if (antcomb->count == ATH_ANT_DIV_COMB_MAX_COUNT) { if (antcomb->count == ATH_ANT_DIV_COMB_MAX_COUNT) {
@ -649,40 +684,17 @@ void ath_ant_comb_scan(struct ath_softc *sc, struct ath_rx_status *rs)
} }
if (!antcomb->scan) { if (!antcomb->scan) {
if (ath_ant_div_comb_alt_check(div_ant_conf, alt_ratio, ret = ath_ant_try_switch(&div_ant_conf, alt_ratio,
alt_rssi_avg, main_rssi_avg)) { alt_rssi_avg, main_rssi_avg,
if (curr_alt_set == ATH_ANT_DIV_COMB_LNA2) { curr_main_set, curr_alt_set);
/* Switch main and alt LNA */ if (ret)
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)))
goto div_comb_done; 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) { if (!antcomb->scan_not_start) {
switch (curr_alt_set) { switch (curr_alt_set) {
case ATH_ANT_DIV_COMB_LNA2: case ATH_ANT_DIV_COMB_LNA2: