diff --git a/drivers/net/wireless/ath9k/calib.c b/drivers/net/wireless/ath9k/calib.c
new file mode 100644
index 0000000..1690759
--- /dev/null
+++ b/drivers/net/wireless/ath9k/calib.c
@@ -0,0 +1,930 @@
+/*
+ * 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 = (int16_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 = (int16_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
+};