Commit 8bd1d07f authored by Senthil Balasubramanian's avatar Senthil Balasubramanian Committed by John W. Linville
Browse files

ath9k: Add open loop control support



This patch adds Open Loop Control support for Atheros chipsets that
supports open loop power control.
Signed-off-by: default avatarSenthil Balasubramanian <senthilkumar@atheros.com>
Signed-off-by: default avatarJohn W. Linville <linville@tuxdriver.com>
parent 81cb7623
......@@ -718,10 +718,39 @@ s16 ath9k_hw_getchan_noise(struct ath_hw *ah, struct ath9k_channel *chan)
return nf;
}
static void ath9k_olc_temp_compensation(struct ath_hw *ah)
{
u32 rddata, i;
int delta, currPDADC, regval;
rddata = REG_READ(ah, AR_PHY_TX_PWRCTRL4);
currPDADC = MS(rddata, AR_PHY_TX_PWRCTRL_PD_AVG_OUT);
if (ah->eep_ops->get_eeprom(ah, EEP_DAC_HPWR_5G))
delta = (currPDADC - ah->initPDADC + 4) / 8;
else
delta = (currPDADC - ah->initPDADC + 5) / 10;
if (delta != ah->PDADCdelta) {
ah->PDADCdelta = delta;
for (i = 1; i < AR9280_TX_GAIN_TABLE_SIZE; i++) {
regval = ah->originalGain[i] - delta;
if (regval < 0)
regval = 0;
REG_RMW_FIELD(ah, AR_PHY_TX_GAIN_TBL1 + i * 4,
AR_PHY_TX_GAIN, regval);
}
}
}
bool ath9k_hw_calibrate(struct ath_hw *ah, struct ath9k_channel *chan,
u8 rxchainmask, bool longcal,
bool *isCalDone)
{
#define OLC_FOR_AR9280_20_LATER (AR_SREV_9280_20_OR_LATER(ah) && \
ah->eep_ops->get_eeprom(ah, EEP_OL_PWRCTRL))
struct hal_cal_list *currCal = ah->cal_list_curr;
*isCalDone = true;
......@@ -742,6 +771,8 @@ bool ath9k_hw_calibrate(struct ath_hw *ah, struct ath9k_channel *chan,
}
if (longcal) {
if (OLC_FOR_AR9280_20_LATER)
ath9k_olc_temp_compensation(ah);
ath9k_hw_getnf(ah, chan);
ath9k_hw_loadnf(ah, ah->curchan);
ath9k_hw_start_nfcal(ah);
......
......@@ -179,6 +179,69 @@ static void ath9k_hw_get_legacy_target_powers(struct ath_hw *ah,
}
}
static void ath9k_get_txgain_index(struct ath_hw *ah,
struct ath9k_channel *chan,
struct calDataPerFreqOpLoop *rawDatasetOpLoop,
u8 *calChans, u16 availPiers, u8 *pwr, u8 *pcdacIdx)
{
u8 pcdac, i = 0;
u16 idxL = 0, idxR = 0, numPiers;
bool match;
struct chan_centers centers;
ath9k_hw_get_channel_centers(ah, chan, &centers);
for (numPiers = 0; numPiers < availPiers; numPiers++)
if (calChans[numPiers] == AR5416_BCHAN_UNUSED)
break;
match = ath9k_hw_get_lower_upper_index(
(u8)FREQ2FBIN(centers.synth_center, IS_CHAN_2GHZ(chan)),
calChans, numPiers, &idxL, &idxR);
if (match) {
pcdac = rawDatasetOpLoop[idxL].pcdac[0][0];
*pwr = rawDatasetOpLoop[idxL].pwrPdg[0][0];
} else {
pcdac = rawDatasetOpLoop[idxR].pcdac[0][0];
*pwr = (rawDatasetOpLoop[idxL].pwrPdg[0][0] +
rawDatasetOpLoop[idxR].pwrPdg[0][0])/2;
}
while (pcdac > ah->originalGain[i] &&
i < (AR9280_TX_GAIN_TABLE_SIZE - 1))
i++;
*pcdacIdx = i;
return;
}
static void ath9k_olc_get_pdadcs(struct ath_hw *ah,
u32 initTxGain,
int txPower,
u8 *pPDADCValues)
{
u32 i;
u32 offset;
REG_RMW_FIELD(ah, AR_PHY_TX_PWRCTRL6_0,
AR_PHY_TX_PWRCTRL_ERR_EST_MODE, 3);
REG_RMW_FIELD(ah, AR_PHY_TX_PWRCTRL6_1,
AR_PHY_TX_PWRCTRL_ERR_EST_MODE, 3);
REG_RMW_FIELD(ah, AR_PHY_TX_PWRCTRL7,
AR_PHY_TX_PWRCTRL_INIT_TX_GAIN, initTxGain);
offset = txPower;
for (i = 0; i < AR5416_NUM_PDADC_VALUES; i++)
if (i < offset)
pPDADCValues[i] = 0x0;
else
pPDADCValues[i] = 0xFF;
}
static void ath9k_hw_get_target_powers(struct ath_hw *ah,
struct ath9k_channel *chan,
struct cal_target_power_ht *powInfo,
......@@ -1596,6 +1659,16 @@ static u32 ath9k_hw_def_get_eeprom(struct ath_hw *ah,
return pBase->rxGainType;
case EEP_TXGAIN_TYPE:
return pBase->txGainType;
case EEP_OL_PWRCTRL:
if (AR5416_VER_MASK >= AR5416_EEP_MINOR_VER_19)
return pBase->openLoopPwrCntl ? true : false;
else
return false;
case EEP_RC_CHAIN_MASK:
if (AR5416_VER_MASK >= AR5416_EEP_MINOR_VER_19)
return pBase->rcChainMask;
else
return 0;
case EEP_DAC_HPWR_5G:
if (AR5416_VER_MASK >= AR5416_EEP_MINOR_VER_20)
return pBase->dacHiPwrMode_5G;
......@@ -1839,8 +1912,15 @@ static bool ath9k_hw_def_set_board_values(struct ath_hw *ah,
pModal->swSettleHt40);
}
if (AR_SREV_9280_20_OR_LATER(ah) &&
AR5416_VER_MASK >= AR5416_EEP_MINOR_VER_19)
REG_RMW_FIELD(ah, AR_PHY_CCK_TX_CTRL,
AR_PHY_CCK_TX_CTRL_TX_DAC_SCALE_CCK,
pModal->miscBits);
if (AR_SREV_9280_20(ah) && AR5416_VER_MASK >= AR5416_EEP_MINOR_VER_20) {
if (IS_CHAN_HT20(chan))
if (IS_CHAN_2GHZ(chan))
REG_RMW_FIELD(ah, AR_AN_TOP1, AR_AN_TOP1_DACIPMODE,
eep->baseEepHeader.dacLpMode);
else if (eep->baseEepHeader.dacHiPwrMode_5G)
......@@ -1851,6 +1931,10 @@ static bool ath9k_hw_def_set_board_values(struct ath_hw *ah,
REG_RMW_FIELD(ah, AR_PHY_FRAME_CTL, AR_PHY_FRAME_CTL_TX_CLIP,
pModal->miscBits >> 2);
REG_RMW_FIELD(ah, AR_PHY_TX_PWRCTRL9,
AR_PHY_TX_DESIRED_SCALE_CCK,
eep->baseEepHeader.desiredScaleCCK);
}
return true;
......@@ -2080,6 +2164,12 @@ static bool ath9k_hw_set_def_power_cal_table(struct ath_hw *ah,
struct ath9k_channel *chan,
int16_t *pTxPowerIndexOffset)
{
#define OLC_FOR_AR9280_20_LATER (AR_SREV_9280_20_OR_LATER(ah) && \
ah->eep_ops->get_eeprom(ah, EEP_OL_PWRCTRL))
#define SM_PD_GAIN(x) SM(0x38, AR_PHY_TPCRG5_PD_GAIN_BOUNDARY_##x)
#define SM_PDGAIN_B(x, y) \
SM((gainBoundaries[x]), AR_PHY_TPCRG5_PD_GAIN_BOUNDARY_##y)
struct ar5416_eeprom_def *pEepData = &ah->eeprom.def;
struct cal_data_per_freq *pRawDataset;
u8 *pCalBChans = NULL;
......@@ -2113,6 +2203,12 @@ static bool ath9k_hw_set_def_power_cal_table(struct ath_hw *ah,
numPiers = AR5416_NUM_5G_CAL_PIERS;
}
if (OLC_FOR_AR9280_20_LATER && IS_CHAN_2GHZ(chan)) {
pRawDataset = pEepData->calPierData2G[0];
ah->initPDADC = ((struct calDataPerFreqOpLoop *)
pRawDataset)->vpdPdg[0][0];
}
numXpdGain = 0;
for (i = 1; i <= AR5416_PD_GAINS_IN_MASK; i++) {
......@@ -2148,25 +2244,45 @@ static bool ath9k_hw_set_def_power_cal_table(struct ath_hw *ah,
else
pRawDataset = pEepData->calPierData5G[i];
ath9k_hw_get_def_gain_boundaries_pdadcs(ah, chan,
pRawDataset, pCalBChans,
numPiers, pdGainOverlap_t2,
&tMinCalPower, gainBoundaries,
pdadcValues, numXpdGain);
if (OLC_FOR_AR9280_20_LATER) {
u8 pcdacIdx;
u8 txPower;
ath9k_get_txgain_index(ah, chan,
(struct calDataPerFreqOpLoop *)pRawDataset,
pCalBChans, numPiers, &txPower, &pcdacIdx);
ath9k_olc_get_pdadcs(ah, pcdacIdx,
txPower/2, pdadcValues);
} else {
ath9k_hw_get_def_gain_boundaries_pdadcs(ah,
chan, pRawDataset,
pCalBChans, numPiers,
pdGainOverlap_t2,
&tMinCalPower,
gainBoundaries,
pdadcValues,
numXpdGain);
}
if ((i == 0) || AR_SREV_5416_V20_OR_LATER(ah)) {
REG_WRITE(ah,
AR_PHY_TPCRG5 + regChainOffset,
SM(pdGainOverlap_t2,
AR_PHY_TPCRG5_PD_GAIN_OVERLAP)
| SM(gainBoundaries[0],
AR_PHY_TPCRG5_PD_GAIN_BOUNDARY_1)
| SM(gainBoundaries[1],
AR_PHY_TPCRG5_PD_GAIN_BOUNDARY_2)
| SM(gainBoundaries[2],
AR_PHY_TPCRG5_PD_GAIN_BOUNDARY_3)
| SM(gainBoundaries[3],
AR_PHY_TPCRG5_PD_GAIN_BOUNDARY_4));
if (OLC_FOR_AR9280_20_LATER) {
REG_WRITE(ah,
AR_PHY_TPCRG5 + regChainOffset,
SM(0x6,
AR_PHY_TPCRG5_PD_GAIN_OVERLAP) |
SM_PD_GAIN(1) | SM_PD_GAIN(2) |
SM_PD_GAIN(3) | SM_PD_GAIN(4));
} else {
REG_WRITE(ah,
AR_PHY_TPCRG5 + regChainOffset,
SM(pdGainOverlap_t2,
AR_PHY_TPCRG5_PD_GAIN_OVERLAP)|
SM_PDGAIN_B(0, 1) |
SM_PDGAIN_B(1, 2) |
SM_PDGAIN_B(2, 3) |
SM_PDGAIN_B(3, 4));
}
}
regOffset = AR_PHY_BASE + (672 << 2) + regChainOffset;
......@@ -2200,6 +2316,8 @@ static bool ath9k_hw_set_def_power_cal_table(struct ath_hw *ah,
*pTxPowerIndexOffset = 0;
return true;
#undef SM_PD_GAIN
#undef SM_PDGAIN_B
}
static bool ath9k_hw_set_def_power_per_rate_table(struct ath_hw *ah,
......@@ -2500,13 +2618,14 @@ static int ath9k_hw_def_set_txpower(struct ath_hw *ah,
u8 twiceMaxRegulatoryPower,
u8 powerLimit)
{
#define RT_AR_DELTA(x) (ratesArray[x] - cck_ofdm_delta)
struct ar5416_eeprom_def *pEepData = &ah->eeprom.def;
struct modal_eep_header *pModal =
&(pEepData->modalHeader[IS_CHAN_2GHZ(chan)]);
int16_t ratesArray[Ar5416RateSize];
int16_t txPowerIndexOffset = 0;
u8 ht40PowerIncForPdadc = 2;
int i;
int i, cck_ofdm_delta = 0;
memset(ratesArray, 0, sizeof(ratesArray));
......@@ -2555,16 +2674,30 @@ static int ath9k_hw_def_set_txpower(struct ath_hw *ah,
| ATH9K_POW_SM(ratesArray[rate24mb], 0));
if (IS_CHAN_2GHZ(chan)) {
REG_WRITE(ah, AR_PHY_POWER_TX_RATE3,
ATH9K_POW_SM(ratesArray[rate2s], 24)
| ATH9K_POW_SM(ratesArray[rate2l], 16)
| ATH9K_POW_SM(ratesArray[rateXr], 8)
| ATH9K_POW_SM(ratesArray[rate1l], 0));
REG_WRITE(ah, AR_PHY_POWER_TX_RATE4,
ATH9K_POW_SM(ratesArray[rate11s], 24)
| ATH9K_POW_SM(ratesArray[rate11l], 16)
| ATH9K_POW_SM(ratesArray[rate5_5s], 8)
| ATH9K_POW_SM(ratesArray[rate5_5l], 0));
if (OLC_FOR_AR9280_20_LATER) {
cck_ofdm_delta = 2;
REG_WRITE(ah, AR_PHY_POWER_TX_RATE3,
ATH9K_POW_SM(RT_AR_DELTA(rate2s), 24)
| ATH9K_POW_SM(RT_AR_DELTA(rate2l), 16)
| ATH9K_POW_SM(ratesArray[rateXr], 8)
| ATH9K_POW_SM(RT_AR_DELTA(rate1l), 0));
REG_WRITE(ah, AR_PHY_POWER_TX_RATE4,
ATH9K_POW_SM(RT_AR_DELTA(rate11s), 24)
| ATH9K_POW_SM(RT_AR_DELTA(rate11l), 16)
| ATH9K_POW_SM(RT_AR_DELTA(rate5_5s), 8)
| ATH9K_POW_SM(RT_AR_DELTA(rate5_5l), 0));
} else {
REG_WRITE(ah, AR_PHY_POWER_TX_RATE3,
ATH9K_POW_SM(ratesArray[rate2s], 24)
| ATH9K_POW_SM(ratesArray[rate2l], 16)
| ATH9K_POW_SM(ratesArray[rateXr], 8)
| ATH9K_POW_SM(ratesArray[rate1l], 0));
REG_WRITE(ah, AR_PHY_POWER_TX_RATE4,
ATH9K_POW_SM(ratesArray[rate11s], 24)
| ATH9K_POW_SM(ratesArray[rate11l], 16)
| ATH9K_POW_SM(ratesArray[rate5_5s], 8)
| ATH9K_POW_SM(ratesArray[rate5_5l], 0));
}
}
REG_WRITE(ah, AR_PHY_POWER_TX_RATE5,
......@@ -2597,12 +2730,19 @@ static int ath9k_hw_def_set_txpower(struct ath_hw *ah,
ht40PowerIncForPdadc, 8)
| ATH9K_POW_SM(ratesArray[rateHt40_4] +
ht40PowerIncForPdadc, 0));
REG_WRITE(ah, AR_PHY_POWER_TX_RATE9,
ATH9K_POW_SM(ratesArray[rateExtOfdm], 24)
| ATH9K_POW_SM(ratesArray[rateExtCck], 16)
| ATH9K_POW_SM(ratesArray[rateDupOfdm], 8)
| ATH9K_POW_SM(ratesArray[rateDupCck], 0));
if (OLC_FOR_AR9280_20_LATER) {
REG_WRITE(ah, AR_PHY_POWER_TX_RATE9,
ATH9K_POW_SM(ratesArray[rateExtOfdm], 24)
| ATH9K_POW_SM(RT_AR_DELTA(rateExtCck), 16)
| ATH9K_POW_SM(ratesArray[rateDupOfdm], 8)
| ATH9K_POW_SM(RT_AR_DELTA(rateDupCck), 0));
} else {
REG_WRITE(ah, AR_PHY_POWER_TX_RATE9,
ATH9K_POW_SM(ratesArray[rateExtOfdm], 24)
| ATH9K_POW_SM(ratesArray[rateExtCck], 16)
| ATH9K_POW_SM(ratesArray[rateDupOfdm], 8)
| ATH9K_POW_SM(ratesArray[rateDupCck], 0));
}
}
REG_WRITE(ah, AR_PHY_POWER_TX_SUB,
......
......@@ -168,6 +168,8 @@
#define AR5416_EEP4K_PD_GAIN_ICEPTS 5
#define AR5416_EEP4K_MAX_CHAINS 1
#define AR9280_TX_GAIN_TABLE_SIZE 22
enum eeprom_param {
EEP_NFTHRESH_5,
EEP_NFTHRESH_2,
......@@ -188,6 +190,8 @@ enum eeprom_param {
EEP_RX_MASK,
EEP_RXGAIN_TYPE,
EEP_TXGAIN_TYPE,
EEP_OL_PWRCTRL,
EEP_RC_CHAIN_MASK,
EEP_DAC_HPWR_5G,
EEP_FRAC_N_5G
};
......@@ -229,7 +233,7 @@ struct base_eep_header {
u8 futureBase_1[2];
u8 rxGainType;
u8 dacHiPwrMode_5G;
u8 futureBase_2;
u8 openLoopPwrCntl;
u8 dacLpMode;
u8 txGainType;
u8 rcChainMask;
......@@ -310,6 +314,13 @@ struct modal_eep_header {
struct spur_chan spurChans[AR5416_EEPROM_MODAL_SPURS];
} __packed;
struct calDataPerFreqOpLoop {
u8 pwrPdg[2][5];
u8 vpdPdg[2][5];
u8 pcdac[2][5];
u8 empty[2][5];
} __packed;
struct modal_eep_4k_header {
u32 antCtrlChain[AR5416_EEP4K_MAX_CHAINS];
u32 antCtrlCommon;
......
......@@ -1202,10 +1202,23 @@ static u32 ath9k_hw_ini_fixup(struct ath_hw *ah,
return ath9k_hw_def_ini_fixup(ah, pEepData, reg, value);
}
static void ath9k_olc_init(struct ath_hw *ah)
{
u32 i;
for (i = 0; i < AR9280_TX_GAIN_TABLE_SIZE; i++)
ah->originalGain[i] =
MS(REG_READ(ah, AR_PHY_TX_GAIN_TBL1 + i * 4),
AR_PHY_TX_GAIN);
ah->PDADCdelta = 0;
}
static int ath9k_hw_process_ini(struct ath_hw *ah,
struct ath9k_channel *chan,
enum ath9k_ht_macmode macmode)
{
#define OLC_FOR_AR9280_20_LATER (AR_SREV_9280_20_OR_LATER(ah) && \
ah->eep_ops->get_eeprom(ah, EEP_OL_PWRCTRL))
int i, regWrites = 0;
struct ieee80211_channel *channel = chan->chan;
u32 modesIndex, freqIndex;
......@@ -1308,6 +1321,9 @@ static int ath9k_hw_process_ini(struct ath_hw *ah,
ath9k_hw_set_regs(ah, chan, macmode);
ath9k_hw_init_chain_masks(ah);
if (OLC_FOR_AR9280_20_LATER)
ath9k_olc_init(ah);
status = ah->eep_ops->set_txpower(ah, chan,
ath9k_regd_get_ctl(ah, chan),
channel->max_antenna_gain * 2,
......@@ -1515,6 +1531,7 @@ static bool ath9k_hw_set_reset_power_on(struct ath_hw *ah)
AR_RTC_FORCE_WAKE_ON_INT);
REG_WRITE(ah, AR_RTC_RESET, 0);
udelay(2);
REG_WRITE(ah, AR_RTC_RESET, 1);
if (!ath9k_hw_wait(ah,
......@@ -1582,7 +1599,10 @@ static void ath9k_hw_set_regs(struct ath_hw *ah, struct ath9k_channel *chan,
static bool ath9k_hw_chip_reset(struct ath_hw *ah,
struct ath9k_channel *chan)
{
if (!ath9k_hw_set_reset_reg(ah, ATH9K_RESET_WARM))
if (OLC_FOR_AR9280_20_LATER) {
if (!ath9k_hw_set_reset_reg(ah, ATH9K_RESET_POWER_ON))
return false;
} else if (!ath9k_hw_set_reset_reg(ah, ATH9K_RESET_WARM))
return false;
if (!ath9k_hw_setpower(ah, ATH9K_PM_AWAKE))
......@@ -3404,6 +3424,10 @@ bool ath9k_hw_getcapability(struct ath_hw *ah, enum ath9k_capability_type type,
return 0;
}
return false;
case ATH9K_CAP_DS:
return (AR_SREV_9280_20_OR_LATER(ah) &&
(ah->eep_ops->get_eeprom(ah, EEP_RC_CHAIN_MASK) == 1))
? false : true;
default:
return false;
}
......
......@@ -162,7 +162,8 @@ enum ath9k_capability_type {
ATH9K_CAP_WME_TKIPMIC,
ATH9K_CAP_RFSILENT,
ATH9K_CAP_ANT_CFG_2GHZ,
ATH9K_CAP_ANT_CFG_5GHZ
ATH9K_CAP_ANT_CFG_5GHZ,
ATH9K_CAP_DS
};
struct ath9k_hw_capabilities {
......@@ -551,6 +552,10 @@ struct ath_hw {
u8 txchainmask;
u8 rxchainmask;
u32 originalGain[22];
int initPDADC;
int PDADCdelta;
struct ar5416IniArray iniModes;
struct ar5416IniArray iniCommon;
struct ar5416IniArray iniBank0;
......
......@@ -387,6 +387,8 @@ bool ath9k_hw_init_rf(struct ath_hw *ah,
#define AR_PHY_CCK_TX_CTRL 0xA204
#define AR_PHY_CCK_TX_CTRL_JAPAN 0x00000010
#define AR_PHY_CCK_TX_CTRL_TX_DAC_SCALE_CCK 0x0000000C
#define AR_PHY_CCK_TX_CTRL_TX_DAC_SCALE_CCK_S 2
#define AR_PHY_CCK_DETECT 0xA208
#define AR_PHY_CCK_DETECT_WEAK_SIG_THR_CCK 0x0000003F
......@@ -444,6 +446,29 @@ bool ath9k_hw_init_rf(struct ath_hw *ah,
#define AR_PHY_TPCRG1_PD_GAIN_3 0x00300000
#define AR_PHY_TPCRG1_PD_GAIN_3_S 20
#define AR_PHY_TX_PWRCTRL4 0xa264
#define AR_PHY_TX_PWRCTRL_PD_AVG_VALID 0x00000001
#define AR_PHY_TX_PWRCTRL_PD_AVG_VALID_S 0
#define AR_PHY_TX_PWRCTRL_PD_AVG_OUT 0x000001FE
#define AR_PHY_TX_PWRCTRL_PD_AVG_OUT_S 1
#define AR_PHY_TX_PWRCTRL6_0 0xa270
#define AR_PHY_TX_PWRCTRL6_1 0xb270
#define AR_PHY_TX_PWRCTRL_ERR_EST_MODE 0x03000000
#define AR_PHY_TX_PWRCTRL_ERR_EST_MODE_S 24
#define AR_PHY_TX_PWRCTRL7 0xa274
#define AR_PHY_TX_PWRCTRL_INIT_TX_GAIN 0x01F80000
#define AR_PHY_TX_PWRCTRL_INIT_TX_GAIN_S 19
#define AR_PHY_TX_PWRCTRL9 0xa27C
#define AR_PHY_TX_DESIRED_SCALE_CCK 0x00007C00
#define AR_PHY_TX_DESIRED_SCALE_CCK_S 10
#define AR_PHY_TX_GAIN_TBL1 0xa300
#define AR_PHY_TX_GAIN 0x0007F000
#define AR_PHY_TX_GAIN_S 12
#define AR_PHY_VIT_MASK2_M_46_61 0xa3a0
#define AR_PHY_MASK2_M_31_45 0xa3a4
#define AR_PHY_MASK2_M_16_30 0xa3a8
......
......@@ -1392,6 +1392,7 @@ static void ath_rc_init(struct ath_softc *sc,
struct ath_rateset *rateset = &ath_rc_priv->neg_rates;
u8 *ht_mcs = (u8 *)&ath_rc_priv->neg_ht_rates;
u8 i, j, k, hi = 0, hthi = 0;
struct ath_hw *ah = sc->sc_ah;
/* FIXME: Adhoc */
if ((sc->sc_ah->opmode == NL80211_IFTYPE_STATION) ||
......@@ -1412,7 +1413,8 @@ static void ath_rc_init(struct ath_softc *sc,
if (sta->ht_cap.ht_supported) {
ath_rc_priv->ht_cap = WLAN_RC_HT_FLAG;
if (sc->sc_ah->caps.tx_chainmask != 1)
if (sc->sc_ah->caps.tx_chainmask != 1 &&
ath9k_hw_getcapability(ah, ATH9K_CAP_DS, 0, NULL))
ath_rc_priv->ht_cap |= WLAN_RC_DS_FLAG;
if (sta->ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40)
ath_rc_priv->ht_cap |= WLAN_RC_40_FLAG;
......
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