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linux/drivers/net/wireless/ath9k/calib.c
Senthil Balasubramanian 793c592995 ath9k: Fix AR9285 specific noise floor eeprom reads. 
Fix AR9285 specific noise floor reads and initialize tx and rx
chainmask during reset. This along with the following earlier
patches of ath9k fixes an issue with association noticed in
noisy environment.

ath9k: Fix typo in chip version check
ath9k: Remove unnecessary gpio configuration in ath9k_hw_reset()
ath9k: Fix bug in NF calibration

Signed-off-by: Senthil Balasubramanian <senthilkumar@atheros.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
2009-01-29 16:01:49 -05:00

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26 KiB
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/*
* Copyright (c) 2008 Atheros Communications Inc.
*
* Permission to use, copy, modify, and/or distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
#include "core.h"
#include "hw.h"
#include "reg.h"
#include "phy.h"
/* We can tune this as we go by monitoring really low values */
#define ATH9K_NF_TOO_LOW -60
/* AR5416 may return very high value (like -31 dBm), in those cases the nf
* is incorrect and we should use the static NF value. Later we can try to
* find out why they are reporting these values */
static bool ath9k_hw_nf_in_range(struct ath_hal *ah, s16 nf)
{
if (nf > ATH9K_NF_TOO_LOW) {
DPRINTF(ah->ah_sc, ATH_DBG_CALIBRATE,
"noise floor value detected (%d) is "
"lower than what we think is a "
"reasonable value (%d)\n",
nf, ATH9K_NF_TOO_LOW);
return false;
}
return true;
}
static int16_t ath9k_hw_get_nf_hist_mid(int16_t *nfCalBuffer)
{
int16_t nfval;
int16_t sort[ATH9K_NF_CAL_HIST_MAX];
int i, j;
for (i = 0; i < ATH9K_NF_CAL_HIST_MAX; i++)
sort[i] = nfCalBuffer[i];
for (i = 0; i < ATH9K_NF_CAL_HIST_MAX - 1; i++) {
for (j = 1; j < ATH9K_NF_CAL_HIST_MAX - i; j++) {
if (sort[j] > sort[j - 1]) {
nfval = sort[j];
sort[j] = sort[j - 1];
sort[j - 1] = nfval;
}
}
}
nfval = sort[(ATH9K_NF_CAL_HIST_MAX - 1) >> 1];
return nfval;
}
static void ath9k_hw_update_nfcal_hist_buffer(struct ath9k_nfcal_hist *h,
int16_t *nfarray)
{
int i;
for (i = 0; i < NUM_NF_READINGS; i++) {
h[i].nfCalBuffer[h[i].currIndex] = nfarray[i];
if (++h[i].currIndex >= ATH9K_NF_CAL_HIST_MAX)
h[i].currIndex = 0;
if (h[i].invalidNFcount > 0) {
if (nfarray[i] < AR_PHY_CCA_MIN_BAD_VALUE ||
nfarray[i] > AR_PHY_CCA_MAX_HIGH_VALUE) {
h[i].invalidNFcount = ATH9K_NF_CAL_HIST_MAX;
} else {
h[i].invalidNFcount--;
h[i].privNF = nfarray[i];
}
} else {
h[i].privNF =
ath9k_hw_get_nf_hist_mid(h[i].nfCalBuffer);
}
}
return;
}
static void ath9k_hw_do_getnf(struct ath_hal *ah,
int16_t nfarray[NUM_NF_READINGS])
{
int16_t nf;
if (AR_SREV_9280_10_OR_LATER(ah))
nf = MS(REG_READ(ah, AR_PHY_CCA), AR9280_PHY_MINCCA_PWR);
else
nf = MS(REG_READ(ah, AR_PHY_CCA), AR_PHY_MINCCA_PWR);
if (nf & 0x100)
nf = 0 - ((nf ^ 0x1ff) + 1);
DPRINTF(ah->ah_sc, ATH_DBG_CALIBRATE,
"NF calibrated [ctl] [chain 0] is %d\n", nf);
nfarray[0] = nf;
if (!AR_SREV_9285(ah)) {
if (AR_SREV_9280_10_OR_LATER(ah))
nf = MS(REG_READ(ah, AR_PHY_CH1_CCA),
AR9280_PHY_CH1_MINCCA_PWR);
else
nf = MS(REG_READ(ah, AR_PHY_CH1_CCA),
AR_PHY_CH1_MINCCA_PWR);
if (nf & 0x100)
nf = 0 - ((nf ^ 0x1ff) + 1);
DPRINTF(ah->ah_sc, ATH_DBG_CALIBRATE,
"NF calibrated [ctl] [chain 1] is %d\n", nf);
nfarray[1] = nf;
if (!AR_SREV_9280(ah)) {
nf = MS(REG_READ(ah, AR_PHY_CH2_CCA),
AR_PHY_CH2_MINCCA_PWR);
if (nf & 0x100)
nf = 0 - ((nf ^ 0x1ff) + 1);
DPRINTF(ah->ah_sc, ATH_DBG_CALIBRATE,
"NF calibrated [ctl] [chain 2] is %d\n", nf);
nfarray[2] = nf;
}
}
if (AR_SREV_9280_10_OR_LATER(ah))
nf = MS(REG_READ(ah, AR_PHY_EXT_CCA),
AR9280_PHY_EXT_MINCCA_PWR);
else
nf = MS(REG_READ(ah, AR_PHY_EXT_CCA),
AR_PHY_EXT_MINCCA_PWR);
if (nf & 0x100)
nf = 0 - ((nf ^ 0x1ff) + 1);
DPRINTF(ah->ah_sc, ATH_DBG_CALIBRATE,
"NF calibrated [ext] [chain 0] is %d\n", nf);
nfarray[3] = nf;
if (!AR_SREV_9285(ah)) {
if (AR_SREV_9280_10_OR_LATER(ah))
nf = MS(REG_READ(ah, AR_PHY_CH1_EXT_CCA),
AR9280_PHY_CH1_EXT_MINCCA_PWR);
else
nf = MS(REG_READ(ah, AR_PHY_CH1_EXT_CCA),
AR_PHY_CH1_EXT_MINCCA_PWR);
if (nf & 0x100)
nf = 0 - ((nf ^ 0x1ff) + 1);
DPRINTF(ah->ah_sc, ATH_DBG_CALIBRATE,
"NF calibrated [ext] [chain 1] is %d\n", nf);
nfarray[4] = nf;
if (!AR_SREV_9280(ah)) {
nf = MS(REG_READ(ah, AR_PHY_CH2_EXT_CCA),
AR_PHY_CH2_EXT_MINCCA_PWR);
if (nf & 0x100)
nf = 0 - ((nf ^ 0x1ff) + 1);
DPRINTF(ah->ah_sc, ATH_DBG_CALIBRATE,
"NF calibrated [ext] [chain 2] is %d\n", nf);
nfarray[5] = nf;
}
}
}
static bool getNoiseFloorThresh(struct ath_hal *ah,
enum ieee80211_band band,
int16_t *nft)
{
switch (band) {
case IEEE80211_BAND_5GHZ:
*nft = (int8_t)ath9k_hw_get_eeprom(ah, EEP_NFTHRESH_5);
break;
case IEEE80211_BAND_2GHZ:
*nft = (int8_t)ath9k_hw_get_eeprom(ah, EEP_NFTHRESH_2);
break;
default:
BUG_ON(1);
return false;
}
return true;
}
static void ath9k_hw_setup_calibration(struct ath_hal *ah,
struct hal_cal_list *currCal)
{
REG_RMW_FIELD(ah, AR_PHY_TIMING_CTRL4(0),
AR_PHY_TIMING_CTRL4_IQCAL_LOG_COUNT_MAX,
currCal->calData->calCountMax);
switch (currCal->calData->calType) {
case IQ_MISMATCH_CAL:
REG_WRITE(ah, AR_PHY_CALMODE, AR_PHY_CALMODE_IQ);
DPRINTF(ah->ah_sc, ATH_DBG_CALIBRATE,
"starting IQ Mismatch Calibration\n");
break;
case ADC_GAIN_CAL:
REG_WRITE(ah, AR_PHY_CALMODE, AR_PHY_CALMODE_ADC_GAIN);
DPRINTF(ah->ah_sc, ATH_DBG_CALIBRATE,
"starting ADC Gain Calibration\n");
break;
case ADC_DC_CAL:
REG_WRITE(ah, AR_PHY_CALMODE, AR_PHY_CALMODE_ADC_DC_PER);
DPRINTF(ah->ah_sc, ATH_DBG_CALIBRATE,
"starting ADC DC Calibration\n");
break;
case ADC_DC_INIT_CAL:
REG_WRITE(ah, AR_PHY_CALMODE, AR_PHY_CALMODE_ADC_DC_INIT);
DPRINTF(ah->ah_sc, ATH_DBG_CALIBRATE,
"starting Init ADC DC Calibration\n");
break;
}
REG_SET_BIT(ah, AR_PHY_TIMING_CTRL4(0),
AR_PHY_TIMING_CTRL4_DO_CAL);
}
static void ath9k_hw_reset_calibration(struct ath_hal *ah,
struct hal_cal_list *currCal)
{
struct ath_hal_5416 *ahp = AH5416(ah);
int i;
ath9k_hw_setup_calibration(ah, currCal);
currCal->calState = CAL_RUNNING;
for (i = 0; i < AR5416_MAX_CHAINS; i++) {
ahp->ah_Meas0.sign[i] = 0;
ahp->ah_Meas1.sign[i] = 0;
ahp->ah_Meas2.sign[i] = 0;
ahp->ah_Meas3.sign[i] = 0;
}
ahp->ah_CalSamples = 0;
}
static void ath9k_hw_per_calibration(struct ath_hal *ah,
struct ath9k_channel *ichan,
u8 rxchainmask,
struct hal_cal_list *currCal,
bool *isCalDone)
{
struct ath_hal_5416 *ahp = AH5416(ah);
*isCalDone = false;
if (currCal->calState == CAL_RUNNING) {
if (!(REG_READ(ah, AR_PHY_TIMING_CTRL4(0)) &
AR_PHY_TIMING_CTRL4_DO_CAL)) {
currCal->calData->calCollect(ah);
ahp->ah_CalSamples++;
if (ahp->ah_CalSamples >= currCal->calData->calNumSamples) {
int i, numChains = 0;
for (i = 0; i < AR5416_MAX_CHAINS; i++) {
if (rxchainmask & (1 << i))
numChains++;
}
currCal->calData->calPostProc(ah, numChains);
ichan->CalValid |= currCal->calData->calType;
currCal->calState = CAL_DONE;
*isCalDone = true;
} else {
ath9k_hw_setup_calibration(ah, currCal);
}
}
} else if (!(ichan->CalValid & currCal->calData->calType)) {
ath9k_hw_reset_calibration(ah, currCal);
}
}
/* Assumes you are talking about the currently configured channel */
static bool ath9k_hw_iscal_supported(struct ath_hal *ah,
enum hal_cal_types calType)
{
struct ath_hal_5416 *ahp = AH5416(ah);
struct ieee80211_conf *conf = &ah->ah_sc->hw->conf;
switch (calType & ahp->ah_suppCals) {
case IQ_MISMATCH_CAL: /* Both 2 GHz and 5 GHz support OFDM */
return true;
case ADC_GAIN_CAL:
case ADC_DC_CAL:
if (conf->channel->band == IEEE80211_BAND_5GHZ &&
conf_is_ht20(conf))
return true;
break;
}
return false;
}
static void ath9k_hw_iqcal_collect(struct ath_hal *ah)
{
struct ath_hal_5416 *ahp = AH5416(ah);
int i;
for (i = 0; i < AR5416_MAX_CHAINS; i++) {
ahp->ah_totalPowerMeasI[i] +=
REG_READ(ah, AR_PHY_CAL_MEAS_0(i));
ahp->ah_totalPowerMeasQ[i] +=
REG_READ(ah, AR_PHY_CAL_MEAS_1(i));
ahp->ah_totalIqCorrMeas[i] +=
(int32_t) REG_READ(ah, AR_PHY_CAL_MEAS_2(i));
DPRINTF(ah->ah_sc, ATH_DBG_CALIBRATE,
"%d: Chn %d pmi=0x%08x;pmq=0x%08x;iqcm=0x%08x;\n",
ahp->ah_CalSamples, i, ahp->ah_totalPowerMeasI[i],
ahp->ah_totalPowerMeasQ[i],
ahp->ah_totalIqCorrMeas[i]);
}
}
static void ath9k_hw_adc_gaincal_collect(struct ath_hal *ah)
{
struct ath_hal_5416 *ahp = AH5416(ah);
int i;
for (i = 0; i < AR5416_MAX_CHAINS; i++) {
ahp->ah_totalAdcIOddPhase[i] +=
REG_READ(ah, AR_PHY_CAL_MEAS_0(i));
ahp->ah_totalAdcIEvenPhase[i] +=
REG_READ(ah, AR_PHY_CAL_MEAS_1(i));
ahp->ah_totalAdcQOddPhase[i] +=
REG_READ(ah, AR_PHY_CAL_MEAS_2(i));
ahp->ah_totalAdcQEvenPhase[i] +=
REG_READ(ah, AR_PHY_CAL_MEAS_3(i));
DPRINTF(ah->ah_sc, ATH_DBG_CALIBRATE,
"%d: Chn %d oddi=0x%08x; eveni=0x%08x; "
"oddq=0x%08x; evenq=0x%08x;\n",
ahp->ah_CalSamples, i,
ahp->ah_totalAdcIOddPhase[i],
ahp->ah_totalAdcIEvenPhase[i],
ahp->ah_totalAdcQOddPhase[i],
ahp->ah_totalAdcQEvenPhase[i]);
}
}
static void ath9k_hw_adc_dccal_collect(struct ath_hal *ah)
{
struct ath_hal_5416 *ahp = AH5416(ah);
int i;
for (i = 0; i < AR5416_MAX_CHAINS; i++) {
ahp->ah_totalAdcDcOffsetIOddPhase[i] +=
(int32_t) REG_READ(ah, AR_PHY_CAL_MEAS_0(i));
ahp->ah_totalAdcDcOffsetIEvenPhase[i] +=
(int32_t) REG_READ(ah, AR_PHY_CAL_MEAS_1(i));
ahp->ah_totalAdcDcOffsetQOddPhase[i] +=
(int32_t) REG_READ(ah, AR_PHY_CAL_MEAS_2(i));
ahp->ah_totalAdcDcOffsetQEvenPhase[i] +=
(int32_t) REG_READ(ah, AR_PHY_CAL_MEAS_3(i));
DPRINTF(ah->ah_sc, ATH_DBG_CALIBRATE,
"%d: Chn %d oddi=0x%08x; eveni=0x%08x; "
"oddq=0x%08x; evenq=0x%08x;\n",
ahp->ah_CalSamples, i,
ahp->ah_totalAdcDcOffsetIOddPhase[i],
ahp->ah_totalAdcDcOffsetIEvenPhase[i],
ahp->ah_totalAdcDcOffsetQOddPhase[i],
ahp->ah_totalAdcDcOffsetQEvenPhase[i]);
}
}
static void ath9k_hw_iqcalibrate(struct ath_hal *ah, u8 numChains)
{
struct ath_hal_5416 *ahp = AH5416(ah);
u32 powerMeasQ, powerMeasI, iqCorrMeas;
u32 qCoffDenom, iCoffDenom;
int32_t qCoff, iCoff;
int iqCorrNeg, i;
for (i = 0; i < numChains; i++) {
powerMeasI = ahp->ah_totalPowerMeasI[i];
powerMeasQ = ahp->ah_totalPowerMeasQ[i];
iqCorrMeas = ahp->ah_totalIqCorrMeas[i];
DPRINTF(ah->ah_sc, ATH_DBG_CALIBRATE,
"Starting IQ Cal and Correction for Chain %d\n",
i);
DPRINTF(ah->ah_sc, ATH_DBG_CALIBRATE,
"Orignal: Chn %diq_corr_meas = 0x%08x\n",
i, ahp->ah_totalIqCorrMeas[i]);
iqCorrNeg = 0;
if (iqCorrMeas > 0x80000000) {
iqCorrMeas = (0xffffffff - iqCorrMeas) + 1;
iqCorrNeg = 1;
}
DPRINTF(ah->ah_sc, ATH_DBG_CALIBRATE,
"Chn %d pwr_meas_i = 0x%08x\n", i, powerMeasI);
DPRINTF(ah->ah_sc, ATH_DBG_CALIBRATE,
"Chn %d pwr_meas_q = 0x%08x\n", i, powerMeasQ);
DPRINTF(ah->ah_sc, ATH_DBG_CALIBRATE, "iqCorrNeg is 0x%08x\n",
iqCorrNeg);
iCoffDenom = (powerMeasI / 2 + powerMeasQ / 2) / 128;
qCoffDenom = powerMeasQ / 64;
if (powerMeasQ != 0) {
iCoff = iqCorrMeas / iCoffDenom;
qCoff = powerMeasI / qCoffDenom - 64;
DPRINTF(ah->ah_sc, ATH_DBG_CALIBRATE,
"Chn %d iCoff = 0x%08x\n", i, iCoff);
DPRINTF(ah->ah_sc, ATH_DBG_CALIBRATE,
"Chn %d qCoff = 0x%08x\n", i, qCoff);
iCoff = iCoff & 0x3f;
DPRINTF(ah->ah_sc, ATH_DBG_CALIBRATE,
"New: Chn %d iCoff = 0x%08x\n", i, iCoff);
if (iqCorrNeg == 0x0)
iCoff = 0x40 - iCoff;
if (qCoff > 15)
qCoff = 15;
else if (qCoff <= -16)
qCoff = 16;
DPRINTF(ah->ah_sc, ATH_DBG_CALIBRATE,
"Chn %d : iCoff = 0x%x qCoff = 0x%x\n",
i, iCoff, qCoff);
REG_RMW_FIELD(ah, AR_PHY_TIMING_CTRL4(i),
AR_PHY_TIMING_CTRL4_IQCORR_Q_I_COFF,
iCoff);
REG_RMW_FIELD(ah, AR_PHY_TIMING_CTRL4(i),
AR_PHY_TIMING_CTRL4_IQCORR_Q_Q_COFF,
qCoff);
DPRINTF(ah->ah_sc, ATH_DBG_CALIBRATE,
"IQ Cal and Correction done for Chain %d\n",
i);
}
}
REG_SET_BIT(ah, AR_PHY_TIMING_CTRL4(0),
AR_PHY_TIMING_CTRL4_IQCORR_ENABLE);
}
static void ath9k_hw_adc_gaincal_calibrate(struct ath_hal *ah, u8 numChains)
{
struct ath_hal_5416 *ahp = AH5416(ah);
u32 iOddMeasOffset, iEvenMeasOffset, qOddMeasOffset, qEvenMeasOffset;
u32 qGainMismatch, iGainMismatch, val, i;
for (i = 0; i < numChains; i++) {
iOddMeasOffset = ahp->ah_totalAdcIOddPhase[i];
iEvenMeasOffset = ahp->ah_totalAdcIEvenPhase[i];
qOddMeasOffset = ahp->ah_totalAdcQOddPhase[i];
qEvenMeasOffset = ahp->ah_totalAdcQEvenPhase[i];
DPRINTF(ah->ah_sc, ATH_DBG_CALIBRATE,
"Starting ADC Gain Cal for Chain %d\n", i);
DPRINTF(ah->ah_sc, ATH_DBG_CALIBRATE,
"Chn %d pwr_meas_odd_i = 0x%08x\n", i,
iOddMeasOffset);
DPRINTF(ah->ah_sc, ATH_DBG_CALIBRATE,
"Chn %d pwr_meas_even_i = 0x%08x\n", i,
iEvenMeasOffset);
DPRINTF(ah->ah_sc, ATH_DBG_CALIBRATE,
"Chn %d pwr_meas_odd_q = 0x%08x\n", i,
qOddMeasOffset);
DPRINTF(ah->ah_sc, ATH_DBG_CALIBRATE,
"Chn %d pwr_meas_even_q = 0x%08x\n", i,
qEvenMeasOffset);
if (iOddMeasOffset != 0 && qEvenMeasOffset != 0) {
iGainMismatch =
((iEvenMeasOffset * 32) /
iOddMeasOffset) & 0x3f;
qGainMismatch =
((qOddMeasOffset * 32) /
qEvenMeasOffset) & 0x3f;
DPRINTF(ah->ah_sc, ATH_DBG_CALIBRATE,
"Chn %d gain_mismatch_i = 0x%08x\n", i,
iGainMismatch);
DPRINTF(ah->ah_sc, ATH_DBG_CALIBRATE,
"Chn %d gain_mismatch_q = 0x%08x\n", i,
qGainMismatch);
val = REG_READ(ah, AR_PHY_NEW_ADC_DC_GAIN_CORR(i));
val &= 0xfffff000;
val |= (qGainMismatch) | (iGainMismatch << 6);
REG_WRITE(ah, AR_PHY_NEW_ADC_DC_GAIN_CORR(i), val);
DPRINTF(ah->ah_sc, ATH_DBG_CALIBRATE,
"ADC Gain Cal done for Chain %d\n", i);
}
}
REG_WRITE(ah, AR_PHY_NEW_ADC_DC_GAIN_CORR(0),
REG_READ(ah, AR_PHY_NEW_ADC_DC_GAIN_CORR(0)) |
AR_PHY_NEW_ADC_GAIN_CORR_ENABLE);
}
static void ath9k_hw_adc_dccal_calibrate(struct ath_hal *ah, u8 numChains)
{
struct ath_hal_5416 *ahp = AH5416(ah);
u32 iOddMeasOffset, iEvenMeasOffset, val, i;
int32_t qOddMeasOffset, qEvenMeasOffset, qDcMismatch, iDcMismatch;
const struct hal_percal_data *calData =
ahp->ah_cal_list_curr->calData;
u32 numSamples =
(1 << (calData->calCountMax + 5)) * calData->calNumSamples;
for (i = 0; i < numChains; i++) {
iOddMeasOffset = ahp->ah_totalAdcDcOffsetIOddPhase[i];
iEvenMeasOffset = ahp->ah_totalAdcDcOffsetIEvenPhase[i];
qOddMeasOffset = ahp->ah_totalAdcDcOffsetQOddPhase[i];
qEvenMeasOffset = ahp->ah_totalAdcDcOffsetQEvenPhase[i];
DPRINTF(ah->ah_sc, ATH_DBG_CALIBRATE,
"Starting ADC DC Offset Cal for Chain %d\n", i);
DPRINTF(ah->ah_sc, ATH_DBG_CALIBRATE,
"Chn %d pwr_meas_odd_i = %d\n", i,
iOddMeasOffset);
DPRINTF(ah->ah_sc, ATH_DBG_CALIBRATE,
"Chn %d pwr_meas_even_i = %d\n", i,
iEvenMeasOffset);
DPRINTF(ah->ah_sc, ATH_DBG_CALIBRATE,
"Chn %d pwr_meas_odd_q = %d\n", i,
qOddMeasOffset);
DPRINTF(ah->ah_sc, ATH_DBG_CALIBRATE,
"Chn %d pwr_meas_even_q = %d\n", i,
qEvenMeasOffset);
iDcMismatch = (((iEvenMeasOffset - iOddMeasOffset) * 2) /
numSamples) & 0x1ff;
qDcMismatch = (((qOddMeasOffset - qEvenMeasOffset) * 2) /
numSamples) & 0x1ff;
DPRINTF(ah->ah_sc, ATH_DBG_CALIBRATE,
"Chn %d dc_offset_mismatch_i = 0x%08x\n", i,
iDcMismatch);
DPRINTF(ah->ah_sc, ATH_DBG_CALIBRATE,
"Chn %d dc_offset_mismatch_q = 0x%08x\n", i,
qDcMismatch);
val = REG_READ(ah, AR_PHY_NEW_ADC_DC_GAIN_CORR(i));
val &= 0xc0000fff;
val |= (qDcMismatch << 12) | (iDcMismatch << 21);
REG_WRITE(ah, AR_PHY_NEW_ADC_DC_GAIN_CORR(i), val);
DPRINTF(ah->ah_sc, ATH_DBG_CALIBRATE,
"ADC DC Offset Cal done for Chain %d\n", i);
}
REG_WRITE(ah, AR_PHY_NEW_ADC_DC_GAIN_CORR(0),
REG_READ(ah, AR_PHY_NEW_ADC_DC_GAIN_CORR(0)) |
AR_PHY_NEW_ADC_DC_OFFSET_CORR_ENABLE);
}
/* This is done for the currently configured channel */
bool ath9k_hw_reset_calvalid(struct ath_hal *ah)
{
struct ath_hal_5416 *ahp = AH5416(ah);
struct ieee80211_conf *conf = &ah->ah_sc->hw->conf;
struct hal_cal_list *currCal = ahp->ah_cal_list_curr;
if (!ah->ah_curchan)
return true;
if (!AR_SREV_9100(ah) && !AR_SREV_9160_10_OR_LATER(ah))
return true;
if (currCal == NULL)
return true;
if (currCal->calState != CAL_DONE) {
DPRINTF(ah->ah_sc, ATH_DBG_CALIBRATE,
"Calibration state incorrect, %d\n",
currCal->calState);
return true;
}
if (!ath9k_hw_iscal_supported(ah, currCal->calData->calType))
return true;
DPRINTF(ah->ah_sc, ATH_DBG_CALIBRATE,
"Resetting Cal %d state for channel %u\n",
currCal->calData->calType, conf->channel->center_freq);
ah->ah_curchan->CalValid &= ~currCal->calData->calType;
currCal->calState = CAL_WAITING;
return false;
}
void ath9k_hw_start_nfcal(struct ath_hal *ah)
{
REG_SET_BIT(ah, AR_PHY_AGC_CONTROL,
AR_PHY_AGC_CONTROL_ENABLE_NF);
REG_SET_BIT(ah, AR_PHY_AGC_CONTROL,
AR_PHY_AGC_CONTROL_NO_UPDATE_NF);
REG_SET_BIT(ah, AR_PHY_AGC_CONTROL, AR_PHY_AGC_CONTROL_NF);
}
void ath9k_hw_loadnf(struct ath_hal *ah, struct ath9k_channel *chan)
{
struct ath9k_nfcal_hist *h;
int i, j;
int32_t val;
const u32 ar5416_cca_regs[6] = {
AR_PHY_CCA,
AR_PHY_CH1_CCA,
AR_PHY_CH2_CCA,
AR_PHY_EXT_CCA,
AR_PHY_CH1_EXT_CCA,
AR_PHY_CH2_EXT_CCA
};
u8 chainmask;
if (AR_SREV_9285(ah))
chainmask = 0x9;
else if (AR_SREV_9280(ah))
chainmask = 0x1B;
else
chainmask = 0x3F;
h = ah->nfCalHist;
for (i = 0; i < NUM_NF_READINGS; i++) {
if (chainmask & (1 << i)) {
val = REG_READ(ah, ar5416_cca_regs[i]);
val &= 0xFFFFFE00;
val |= (((u32) (h[i].privNF) << 1) & 0x1ff);
REG_WRITE(ah, ar5416_cca_regs[i], val);
}
}
REG_CLR_BIT(ah, AR_PHY_AGC_CONTROL,
AR_PHY_AGC_CONTROL_ENABLE_NF);
REG_CLR_BIT(ah, AR_PHY_AGC_CONTROL,
AR_PHY_AGC_CONTROL_NO_UPDATE_NF);
REG_SET_BIT(ah, AR_PHY_AGC_CONTROL, AR_PHY_AGC_CONTROL_NF);
for (j = 0; j < 1000; j++) {
if ((REG_READ(ah, AR_PHY_AGC_CONTROL) &
AR_PHY_AGC_CONTROL_NF) == 0)
break;
udelay(10);
}
for (i = 0; i < NUM_NF_READINGS; i++) {
if (chainmask & (1 << i)) {
val = REG_READ(ah, ar5416_cca_regs[i]);
val &= 0xFFFFFE00;
val |= (((u32) (-50) << 1) & 0x1ff);
REG_WRITE(ah, ar5416_cca_regs[i], val);
}
}
}
int16_t ath9k_hw_getnf(struct ath_hal *ah,
struct ath9k_channel *chan)
{
int16_t nf, nfThresh;
int16_t nfarray[NUM_NF_READINGS] = { 0 };
struct ath9k_nfcal_hist *h;
struct ieee80211_channel *c = chan->chan;
chan->channelFlags &= (~CHANNEL_CW_INT);
if (REG_READ(ah, AR_PHY_AGC_CONTROL) & AR_PHY_AGC_CONTROL_NF) {
DPRINTF(ah->ah_sc, ATH_DBG_CALIBRATE,
"NF did not complete in calibration window\n");
nf = 0;
chan->rawNoiseFloor = nf;
return chan->rawNoiseFloor;
} else {
ath9k_hw_do_getnf(ah, nfarray);
nf = nfarray[0];
if (getNoiseFloorThresh(ah, c->band, &nfThresh)
&& nf > nfThresh) {
DPRINTF(ah->ah_sc, ATH_DBG_CALIBRATE,
"noise floor failed detected; "
"detected %d, threshold %d\n",
nf, nfThresh);
chan->channelFlags |= CHANNEL_CW_INT;
}
}
h = ah->nfCalHist;
ath9k_hw_update_nfcal_hist_buffer(h, nfarray);
chan->rawNoiseFloor = h[0].privNF;
return chan->rawNoiseFloor;
}
void ath9k_init_nfcal_hist_buffer(struct ath_hal *ah)
{
int i, j;
for (i = 0; i < NUM_NF_READINGS; i++) {
ah->nfCalHist[i].currIndex = 0;
ah->nfCalHist[i].privNF = AR_PHY_CCA_MAX_GOOD_VALUE;
ah->nfCalHist[i].invalidNFcount =
AR_PHY_CCA_FILTERWINDOW_LENGTH;
for (j = 0; j < ATH9K_NF_CAL_HIST_MAX; j++) {
ah->nfCalHist[i].nfCalBuffer[j] =
AR_PHY_CCA_MAX_GOOD_VALUE;
}
}
return;
}
s16 ath9k_hw_getchan_noise(struct ath_hal *ah, struct ath9k_channel *chan)
{
s16 nf;
if (chan->rawNoiseFloor == 0)
nf = -96;
else
nf = chan->rawNoiseFloor;
if (!ath9k_hw_nf_in_range(ah, nf))
nf = ATH_DEFAULT_NOISE_FLOOR;
return nf;
}
bool ath9k_hw_calibrate(struct ath_hal *ah, struct ath9k_channel *chan,
u8 rxchainmask, bool longcal,
bool *isCalDone)
{
struct ath_hal_5416 *ahp = AH5416(ah);
struct hal_cal_list *currCal = ahp->ah_cal_list_curr;
*isCalDone = true;
if (currCal &&
(currCal->calState == CAL_RUNNING ||
currCal->calState == CAL_WAITING)) {
ath9k_hw_per_calibration(ah, chan, rxchainmask, currCal,
isCalDone);
if (*isCalDone) {
ahp->ah_cal_list_curr = currCal = currCal->calNext;
if (currCal->calState == CAL_WAITING) {
*isCalDone = false;
ath9k_hw_reset_calibration(ah, currCal);
}
}
}
if (longcal) {
ath9k_hw_getnf(ah, chan);
ath9k_hw_loadnf(ah, ah->ah_curchan);
ath9k_hw_start_nfcal(ah);
if (chan->channelFlags & CHANNEL_CW_INT)
chan->channelFlags &= ~CHANNEL_CW_INT;
}
return true;
}
static inline void ath9k_hw_9285_pa_cal(struct ath_hal *ah)
{
u32 regVal;
int i, offset, offs_6_1, offs_0;
u32 ccomp_org, reg_field;
u32 regList[][2] = {
{ 0x786c, 0 },
{ 0x7854, 0 },
{ 0x7820, 0 },
{ 0x7824, 0 },
{ 0x7868, 0 },
{ 0x783c, 0 },
{ 0x7838, 0 },
};
if (AR_SREV_9285_11(ah)) {
REG_WRITE(ah, AR9285_AN_TOP4, (AR9285_AN_TOP4_DEFAULT | 0x14));
udelay(10);
}
for (i = 0; i < ARRAY_SIZE(regList); i++)
regList[i][1] = REG_READ(ah, regList[i][0]);
regVal = REG_READ(ah, 0x7834);
regVal &= (~(0x1));
REG_WRITE(ah, 0x7834, regVal);
regVal = REG_READ(ah, 0x9808);
regVal |= (0x1 << 27);
REG_WRITE(ah, 0x9808, regVal);
REG_RMW_FIELD(ah, AR9285_AN_TOP3, AR9285_AN_TOP3_PWDDAC, 1);
REG_RMW_FIELD(ah, AR9285_AN_RXTXBB1, AR9285_AN_RXTXBB1_PDRXTXBB1, 1);
REG_RMW_FIELD(ah, AR9285_AN_RXTXBB1, AR9285_AN_RXTXBB1_PDV2I, 1);
REG_RMW_FIELD(ah, AR9285_AN_RXTXBB1, AR9285_AN_RXTXBB1_PDDACIF, 1);
REG_RMW_FIELD(ah, AR9285_AN_RF2G2, AR9285_AN_RF2G2_OFFCAL, 0);
REG_RMW_FIELD(ah, AR9285_AN_RF2G7, AR9285_AN_RF2G7_PWDDB, 0);
REG_RMW_FIELD(ah, AR9285_AN_RF2G1, AR9285_AN_RF2G1_ENPACAL, 0);
REG_RMW_FIELD(ah, AR9285_AN_RF2G1, AR9285_AN_RF2G1_PDPADRV1, 1);
REG_RMW_FIELD(ah, AR9285_AN_RF2G1, AR9285_AN_RF2G1_PDPADRV2, 0);
REG_RMW_FIELD(ah, AR9285_AN_RF2G1, AR9285_AN_RF2G1_PDPAOUT, 0);
REG_RMW_FIELD(ah, AR9285_AN_RF2G8, AR9285_AN_RF2G8_PADRVGN2TAB0, 7);
REG_RMW_FIELD(ah, AR9285_AN_RF2G7, AR9285_AN_RF2G7_PADRVGN2TAB0, 0);
ccomp_org = MS(REG_READ(ah, AR9285_AN_RF2G6), AR9285_AN_RF2G6_CCOMP);
REG_RMW_FIELD(ah, AR9285_AN_RF2G6, AR9285_AN_RF2G6_CCOMP, 7);
REG_WRITE(ah, AR9285_AN_TOP2, 0xca0358a0);
udelay(30);
REG_RMW_FIELD(ah, AR9285_AN_RF2G6, AR9285_AN_RF2G6_OFFS, 0);
REG_RMW_FIELD(ah, AR9285_AN_RF2G3, AR9285_AN_RF2G3_PDVCCOMP, 0);
for (i = 6; i > 0; i--) {
regVal = REG_READ(ah, 0x7834);
regVal |= (1 << (19 + i));
REG_WRITE(ah, 0x7834, regVal);
udelay(1);
regVal = REG_READ(ah, 0x7834);
regVal &= (~(0x1 << (19 + i)));
reg_field = MS(REG_READ(ah, 0x7840), AR9285_AN_RXTXBB1_SPARE9);
regVal |= (reg_field << (19 + i));
REG_WRITE(ah, 0x7834, regVal);
}
REG_RMW_FIELD(ah, AR9285_AN_RF2G3, AR9285_AN_RF2G3_PDVCCOMP, 1);
udelay(1);
reg_field = MS(REG_READ(ah, AR9285_AN_RF2G9), AR9285_AN_RXTXBB1_SPARE9);
REG_RMW_FIELD(ah, AR9285_AN_RF2G3, AR9285_AN_RF2G3_PDVCCOMP, reg_field);
offs_6_1 = MS(REG_READ(ah, AR9285_AN_RF2G6), AR9285_AN_RF2G6_OFFS);
offs_0 = MS(REG_READ(ah, AR9285_AN_RF2G3), AR9285_AN_RF2G3_PDVCCOMP);
offset = (offs_6_1<<1) | offs_0;
offset = offset - 0;
offs_6_1 = offset>>1;
offs_0 = offset & 1;
REG_RMW_FIELD(ah, AR9285_AN_RF2G6, AR9285_AN_RF2G6_OFFS, offs_6_1);
REG_RMW_FIELD(ah, AR9285_AN_RF2G3, AR9285_AN_RF2G3_PDVCCOMP, offs_0);
regVal = REG_READ(ah, 0x7834);
regVal |= 0x1;
REG_WRITE(ah, 0x7834, regVal);
regVal = REG_READ(ah, 0x9808);
regVal &= (~(0x1 << 27));
REG_WRITE(ah, 0x9808, regVal);
for (i = 0; i < ARRAY_SIZE(regList); i++)
REG_WRITE(ah, regList[i][0], regList[i][1]);
REG_RMW_FIELD(ah, AR9285_AN_RF2G6, AR9285_AN_RF2G6_CCOMP, ccomp_org);
if (AR_SREV_9285_11(ah))
REG_WRITE(ah, AR9285_AN_TOP4, AR9285_AN_TOP4_DEFAULT);
}
bool ath9k_hw_init_cal(struct ath_hal *ah,
struct ath9k_channel *chan)
{
struct ath_hal_5416 *ahp = AH5416(ah);
REG_WRITE(ah, AR_PHY_AGC_CONTROL,
REG_READ(ah, AR_PHY_AGC_CONTROL) |
AR_PHY_AGC_CONTROL_CAL);
if (!ath9k_hw_wait(ah, AR_PHY_AGC_CONTROL, AR_PHY_AGC_CONTROL_CAL, 0)) {
DPRINTF(ah->ah_sc, ATH_DBG_CALIBRATE,
"offset calibration failed to complete in 1ms; "
"noisy environment?\n");
return false;
}
if (AR_SREV_9285(ah) && AR_SREV_9285_11_OR_LATER(ah))
ath9k_hw_9285_pa_cal(ah);
REG_WRITE(ah, AR_PHY_AGC_CONTROL,
REG_READ(ah, AR_PHY_AGC_CONTROL) |
AR_PHY_AGC_CONTROL_NF);
ahp->ah_cal_list = ahp->ah_cal_list_last = ahp->ah_cal_list_curr = NULL;
if (AR_SREV_9100(ah) || AR_SREV_9160_10_OR_LATER(ah)) {
if (ath9k_hw_iscal_supported(ah, ADC_GAIN_CAL)) {
INIT_CAL(&ahp->ah_adcGainCalData);
INSERT_CAL(ahp, &ahp->ah_adcGainCalData);
DPRINTF(ah->ah_sc, ATH_DBG_CALIBRATE,
"enabling ADC Gain Calibration.\n");
}
if (ath9k_hw_iscal_supported(ah, ADC_DC_CAL)) {
INIT_CAL(&ahp->ah_adcDcCalData);
INSERT_CAL(ahp, &ahp->ah_adcDcCalData);
DPRINTF(ah->ah_sc, ATH_DBG_CALIBRATE,
"enabling ADC DC Calibration.\n");
}
if (ath9k_hw_iscal_supported(ah, IQ_MISMATCH_CAL)) {
INIT_CAL(&ahp->ah_iqCalData);
INSERT_CAL(ahp, &ahp->ah_iqCalData);
DPRINTF(ah->ah_sc, ATH_DBG_CALIBRATE,
"enabling IQ Calibration.\n");
}
ahp->ah_cal_list_curr = ahp->ah_cal_list;
if (ahp->ah_cal_list_curr)
ath9k_hw_reset_calibration(ah, ahp->ah_cal_list_curr);
}
chan->CalValid = 0;
return true;
}
const struct hal_percal_data iq_cal_multi_sample = {
IQ_MISMATCH_CAL,
MAX_CAL_SAMPLES,
PER_MIN_LOG_COUNT,
ath9k_hw_iqcal_collect,
ath9k_hw_iqcalibrate
};
const struct hal_percal_data iq_cal_single_sample = {
IQ_MISMATCH_CAL,
MIN_CAL_SAMPLES,
PER_MAX_LOG_COUNT,
ath9k_hw_iqcal_collect,
ath9k_hw_iqcalibrate
};
const struct hal_percal_data adc_gain_cal_multi_sample = {
ADC_GAIN_CAL,
MAX_CAL_SAMPLES,
PER_MIN_LOG_COUNT,
ath9k_hw_adc_gaincal_collect,
ath9k_hw_adc_gaincal_calibrate
};
const struct hal_percal_data adc_gain_cal_single_sample = {
ADC_GAIN_CAL,
MIN_CAL_SAMPLES,
PER_MAX_LOG_COUNT,
ath9k_hw_adc_gaincal_collect,
ath9k_hw_adc_gaincal_calibrate
};
const struct hal_percal_data adc_dc_cal_multi_sample = {
ADC_DC_CAL,
MAX_CAL_SAMPLES,
PER_MIN_LOG_COUNT,
ath9k_hw_adc_dccal_collect,
ath9k_hw_adc_dccal_calibrate
};
const struct hal_percal_data adc_dc_cal_single_sample = {
ADC_DC_CAL,
MIN_CAL_SAMPLES,
PER_MAX_LOG_COUNT,
ath9k_hw_adc_dccal_collect,
ath9k_hw_adc_dccal_calibrate
};
const struct hal_percal_data adc_init_dc_cal = {
ADC_DC_INIT_CAL,
MIN_CAL_SAMPLES,
INIT_LOG_COUNT,
ath9k_hw_adc_dccal_collect,
ath9k_hw_adc_dccal_calibrate
};
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