/*
* Read rf register to determine if gainF needs correction
*/
static void
ar5212GetGainFCorrection(struct ath_hal *ah)
{
struct ath_hal_5212 *ahp = AH5212(ah);
GAIN_VALUES *gv = &ahp->ah_gainValues;
HALASSERT(IS_RADX112_REV2(ah));
gv->gainFCorrection = 0;
if (ar5212GetRfField(ar5212GetRfBank(ah, 7), 1, 36, 0) == 1) {
uint32_t mixGain = gv->currStep->paramVal[0];
uint32_t gainStep =
ar5212GetRfField(ar5212GetRfBank(ah, 7), 4, 32, 0);
switch (mixGain) {
case 0 :
gv->gainFCorrection = 0;
break;
case 1 :
gv->gainFCorrection = gainStep;
break;
case 2 :
gv->gainFCorrection = 2 * gainStep - 5;
break;
case 3 :
gv->gainFCorrection = 2 * gainStep;
break;
}
}
}
/*
* Exported call to check for a recent gain reading and return
* the current state of the thermal calibration gain engine.
*/
HAL_RFGAIN
ar5212GetRfgain(struct ath_hal *ah)
{
struct ath_hal_5212 *ahp = AH5212(ah);
GAIN_VALUES *gv = &ahp->ah_gainValues;
uint32_t rddata, probeType;
/* NB: beware of touching the BB when PHY is powered down */
if (!gv->active || !ahp->ah_phyPowerOn)
return HAL_RFGAIN_INACTIVE;
if (ahp->ah_rfgainState == HAL_RFGAIN_READ_REQUESTED) {
/* Caller had asked to setup a new reading. Check it. */
rddata = OS_REG_READ(ah, AR_PHY_PAPD_PROBE);
if ((rddata & AR_PHY_PAPD_PROBE_NEXT_TX) == 0) {
/* bit got cleared, we have a new reading. */
gv->currGain = rddata >> AR_PHY_PAPD_PROBE_GAINF_S;
probeType = MS(rddata, AR_PHY_PAPD_PROBE_TYPE);
if (probeType == AR_PHY_PAPD_PROBE_TYPE_CCK) {
const HAL_EEPROM *ee = AH_PRIVATE(ah)->ah_eeprom;
HALASSERT(IS_RAD5112_ANY(ah));
HALASSERT(ah->ah_magic == AR5212_MAGIC);
if (AH_PRIVATE(ah)->ah_phyRev >= AR_PHY_CHIP_ID_REV_2)
gv->currGain += ee->ee_cckOfdmGainDelta;
else
gv->currGain += PHY_PROBE_CCK_CORRECTION;
}
if (IS_RADX112_REV2(ah)) {
uint32_t correct = ar5212GetGainFCorrection(ah);
if (gv->currGain >= correct)
gv->currGain -= correct;
else
gv->currGain = 0;
}
/* inactive by default */
ahp->ah_rfgainState = HAL_RFGAIN_INACTIVE;
if (!ar5212InvalidGainReadback(ah, gv) &&
ar5212IsGainAdjustNeeded(ah, gv) &&
ar5212AdjustGain(ah, gv) > 0) {
/*
* Change needed. Copy ladder info
* into eeprom info.
*/
ahp->ah_rfgainState = HAL_RFGAIN_NEED_CHANGE;
/* for ap51 */
ahp->ah_cwCalRequire = AH_TRUE;
/* Request IQ recalibration for temperature chang */
ahp->ah_bIQCalibration = IQ_CAL_INACTIVE;
}
}
