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linux_old1/drivers/net/wireless/ath9k/calib.c

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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"
static const int16_t NOISE_FLOOR[] = { -96, -93, -98, -96, -93, -96 };
/* 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_NF_CAL,
"%s: noise floor value detected (%d) is "
"lower than what we think is a "
"reasonable value (%d)\n",
__func__, 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_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_NF_CAL,
"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_NF_CAL,
"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_NF_CAL,
"NF calibrated [ext] [chain 0] is %d\n", nf);
nfarray[3] = nf;
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_NF_CAL,
"NF calibrated [ext] [chain 2] is %d\n", nf);
nfarray[5] = nf;
}
}
static bool getNoiseFloorThresh(struct ath_hal *ah,
const struct ath9k_channel *chan,
int16_t *nft)
{
switch (chan->chanmode) {
case CHANNEL_A:
case CHANNEL_A_HT20:
case CHANNEL_A_HT40PLUS:
case CHANNEL_A_HT40MINUS:
*nft = (int8_t)ath9k_hw_get_eeprom(ah, EEP_NFTHRESH_5);
break;
case CHANNEL_B:
case CHANNEL_G:
case CHANNEL_G_HT20:
case CHANNEL_G_HT40PLUS:
case CHANNEL_G_HT40MINUS:
*nft = (int8_t)ath9k_hw_get_eeprom(ah, EEP_NFTHRESH_2);
break;
default:
DPRINTF(ah->ah_sc, ATH_DBG_CHANNEL,
"%s: invalid channel flags 0x%x\n", __func__,
chan->channelFlags);
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,
"%s: starting IQ Mismatch Calibration\n",
__func__);
break;
case ADC_GAIN_CAL:
REG_WRITE(ah, AR_PHY_CALMODE, AR_PHY_CALMODE_ADC_GAIN);
DPRINTF(ah->ah_sc, ATH_DBG_CALIBRATE,
"%s: starting ADC Gain Calibration\n", __func__);
break;
case ADC_DC_CAL:
REG_WRITE(ah, AR_PHY_CALMODE, AR_PHY_CALMODE_ADC_DC_PER);
DPRINTF(ah->ah_sc, ATH_DBG_CALIBRATE,
"%s: starting ADC DC Calibration\n", __func__);
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,
"%s: starting Init ADC DC Calibration\n",
__func__);
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);
}
}
static bool ath9k_hw_iscal_supported(struct ath_hal *ah,
struct ath9k_channel *chan,
enum hal_cal_types calType)
{
struct ath_hal_5416 *ahp = AH5416(ah);
bool retval = false;
switch (calType & ahp->ah_suppCals) {
case IQ_MISMATCH_CAL:
if (!IS_CHAN_B(chan))
retval = true;
break;
case ADC_GAIN_CAL:
case ADC_DC_CAL:
if (!IS_CHAN_B(chan)
&& !(IS_CHAN_2GHZ(chan) && IS_CHAN_HT20(chan)))
retval = true;
break;
}
return retval;
}
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);
}
void ath9k_hw_reset_calvalid(struct ath_hal *ah, struct ath9k_channel *chan,
bool *isCalDone)
{
struct ath_hal_5416 *ahp = AH5416(ah);
struct ath9k_channel *ichan =
ath9k_regd_check_channel(ah, chan);
struct hal_cal_list *currCal = ahp->ah_cal_list_curr;
*isCalDone = true;
if (!AR_SREV_9100(ah) && !AR_SREV_9160_10_OR_LATER(ah))
return;
if (currCal == NULL)
return;
if (ichan == NULL) {
DPRINTF(ah->ah_sc, ATH_DBG_CALIBRATE,
"%s: invalid channel %u/0x%x; no mapping\n",
__func__, chan->channel, chan->channelFlags);
return;
}
if (currCal->calState != CAL_DONE) {
DPRINTF(ah->ah_sc, ATH_DBG_CALIBRATE,
"%s: Calibration state incorrect, %d\n",
__func__, currCal->calState);
return;
}
if (!ath9k_hw_iscal_supported(ah, chan, currCal->calData->calType))
return;
DPRINTF(ah->ah_sc, ATH_DBG_CALIBRATE,
"%s: Resetting Cal %d state for channel %u/0x%x\n",
__func__, currCal->calData->calType, chan->channel,
chan->channelFlags);
ichan->CalValid &= ~currCal->calData->calType;
currCal->calState = CAL_WAITING;
*isCalDone = 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_9280(ah))
chainmask = 0x1B;
else
chainmask = 0x3F;
#ifdef ATH_NF_PER_CHAN
h = chan->nfCalHist;
#else
h = ah->nfCalHist;
#endif
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;
u8 chainmask;
if (AR_SREV_9280(ah))
chainmask = 0x1B;
else
chainmask = 0x3F;
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,
"%s: NF did not complete in calibration window\n",
__func__);
nf = 0;
chan->rawNoiseFloor = nf;
return chan->rawNoiseFloor;
} else {
ath9k_hw_do_getnf(ah, nfarray);
nf = nfarray[0];
if (getNoiseFloorThresh(ah, chan, &nfThresh)
&& nf > nfThresh) {
DPRINTF(ah->ah_sc, ATH_DBG_CALIBRATE,
"%s: noise floor failed detected; "
"detected %d, threshold %d\n", __func__,
nf, nfThresh);
chan->channelFlags |= CHANNEL_CW_INT;
}
}
#ifdef ATH_NF_PER_CHAN
h = chan->nfCalHist;
#else
h = ah->nfCalHist;
#endif
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)
{
struct ath9k_channel *ichan;
s16 nf;
ichan = ath9k_regd_check_channel(ah, chan);
if (ichan == NULL) {
DPRINTF(ah->ah_sc, ATH_DBG_NF_CAL,
"%s: invalid channel %u/0x%x; no mapping\n",
__func__, chan->channel, chan->channelFlags);
return ATH_DEFAULT_NOISE_FLOOR;
}
if (ichan->rawNoiseFloor == 0) {
enum wireless_mode mode = ath9k_hw_chan2wmode(ah, chan);
nf = NOISE_FLOOR[mode];
} else
nf = ichan->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;
struct ath9k_channel *ichan = ath9k_regd_check_channel(ah, chan);
*isCalDone = true;
if (ichan == NULL) {
DPRINTF(ah->ah_sc, ATH_DBG_CHANNEL,
"%s: invalid channel %u/0x%x; no mapping\n",
__func__, chan->channel, chan->channelFlags);
return false;
}
if (currCal &&
(currCal->calState == CAL_RUNNING ||
currCal->calState == CAL_WAITING)) {
ath9k_hw_per_calibration(ah, ichan, 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, ichan);
ath9k_hw_loadnf(ah, ah->ah_curchan);
ath9k_hw_start_nfcal(ah);
if ((ichan->channelFlags & CHANNEL_CW_INT) != 0) {
chan->channelFlags |= CHANNEL_CW_INT;
ichan->channelFlags &= ~CHANNEL_CW_INT;
}
}
return true;
}
bool ath9k_hw_init_cal(struct ath_hal *ah,
struct ath9k_channel *chan)
{
struct ath_hal_5416 *ahp = AH5416(ah);
struct ath9k_channel *ichan = ath9k_regd_check_channel(ah, chan);
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,
"%s: offset calibration failed to complete in 1ms; "
"noisy environment?\n", __func__);
return false;
}
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, chan, ADC_GAIN_CAL)) {
INIT_CAL(&ahp->ah_adcGainCalData);
INSERT_CAL(ahp, &ahp->ah_adcGainCalData);
DPRINTF(ah->ah_sc, ATH_DBG_CALIBRATE,
"%s: enabling ADC Gain Calibration.\n",
__func__);
}
if (ath9k_hw_iscal_supported(ah, chan, ADC_DC_CAL)) {
INIT_CAL(&ahp->ah_adcDcCalData);
INSERT_CAL(ahp, &ahp->ah_adcDcCalData);
DPRINTF(ah->ah_sc, ATH_DBG_CALIBRATE,
"%s: enabling ADC DC Calibration.\n",
__func__);
}
if (ath9k_hw_iscal_supported(ah, chan, IQ_MISMATCH_CAL)) {
INIT_CAL(&ahp->ah_iqCalData);
INSERT_CAL(ahp, &ahp->ah_iqCalData);
DPRINTF(ah->ah_sc, ATH_DBG_CALIBRATE,
"%s: enabling IQ Calibration.\n",
__func__);
}
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);
}
ichan->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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