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ath9k_hw: Implement spur mitigation on AR9003 

Signed-off-by: Felix Fietkau <nbd@openwrt.org>
Signed-off-by: Luis R. Rodriguez <lrodriguez@atheros.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
This commit is contained in:
Felix Fietkau 2010-04-15 17:38:35 -04:00 committed by John W. Linville
parent 317d33280c
commit ca37555407
1 changed files with 49 additions and 1 deletions
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50
drivers/net/wireless/ath/ath9k/ar9003_phy.c
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@ -106,7 +106,55 @@ static int ar9003_hw_set_channel(struct ath_hw *ah, struct ath9k_channel *chan)
static void ar9003_hw_spur_mitigate(struct ath_hw *ah,
struct ath9k_channel *chan)
{
/* TODO */
u32 spur_freq[4] = { 2420, 2440, 2464, 2480 };
int cur_bb_spur, negative = 0, cck_spur_freq;
int i;
/*
* Need to verify range +/- 10 MHz in control channel, otherwise spur
* is out-of-band and can be ignored.
*/
for (i = 0; i < 4; i++) {
negative = 0;
cur_bb_spur = spur_freq[i] - chan->channel;
if (cur_bb_spur < 0) {
negative = 1;
cur_bb_spur = -cur_bb_spur;
}
if (cur_bb_spur < 10) {
cck_spur_freq = (int)((cur_bb_spur << 19) / 11);
if (negative == 1)
cck_spur_freq = -cck_spur_freq;
cck_spur_freq = cck_spur_freq & 0xfffff;
REG_RMW_FIELD(ah, AR_PHY_AGC_CONTROL,
AR_PHY_AGC_CONTROL_YCOK_MAX, 0x7);
REG_RMW_FIELD(ah, AR_PHY_CCK_SPUR_MIT,
AR_PHY_CCK_SPUR_MIT_SPUR_RSSI_THR, 0x7f);
REG_RMW_FIELD(ah, AR_PHY_CCK_SPUR_MIT,
AR_PHY_CCK_SPUR_MIT_SPUR_FILTER_TYPE,
0x2);
REG_RMW_FIELD(ah, AR_PHY_CCK_SPUR_MIT,
AR_PHY_CCK_SPUR_MIT_USE_CCK_SPUR_MIT,
0x1);
REG_RMW_FIELD(ah, AR_PHY_CCK_SPUR_MIT,
AR_PHY_CCK_SPUR_MIT_CCK_SPUR_FREQ,
cck_spur_freq);
return;
}
}
REG_RMW_FIELD(ah, AR_PHY_AGC_CONTROL,
AR_PHY_AGC_CONTROL_YCOK_MAX, 0x5);
REG_RMW_FIELD(ah, AR_PHY_CCK_SPUR_MIT,
AR_PHY_CCK_SPUR_MIT_USE_CCK_SPUR_MIT, 0x0);
REG_RMW_FIELD(ah, AR_PHY_CCK_SPUR_MIT,
AR_PHY_CCK_SPUR_MIT_CCK_SPUR_FREQ, 0x0);
}
static u32 ar9003_hw_compute_pll_control(struct ath_hw *ah,