drivers/net/wireless/ath/ath9k/eeprom.c - kernel/mindspeed - Git at Google

 /*
  * Copyright (c) 2008-2011 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 "hw.h"

 void ath9k_hw_analog_shift_regwrite(struct ath_hw *ah, u32 reg, u32 val)
 {
         REG_WRITE(ah, reg, val);

         if (ah->config.analog_shiftreg)
 		udelay(100);
 }

 void ath9k_hw_analog_shift_rmw(struct ath_hw *ah, u32 reg, u32 mask,
 			       u32 shift, u32 val)
 {
 	REG_RMW(ah, reg, ((val << shift) & mask), mask);

 	if (ah->config.analog_shiftreg)
 		udelay(100);
 }

 int16_t ath9k_hw_interpolate(u16 target, u16 srcLeft, u16 srcRight,
 			     int16_t targetLeft, int16_t targetRight)
 {
 	int16_t rv;

 	if (srcRight == srcLeft) {
 		rv = targetLeft;
 	} else {
 		rv = (int16_t) (((target - srcLeft) * targetRight +
 				 (srcRight - target) * targetLeft) /
 				(srcRight - srcLeft));
 	}
 	return rv;
 }

 bool ath9k_hw_get_lower_upper_index(u8 target, u8 *pList, u16 listSize,
 				    u16 *indexL, u16 *indexR)
 {
 	u16 i;

 	if (target <= pList[0]) {
 		*indexL = *indexR = 0;
 		return true;
 	}
 	if (target >= pList[listSize - 1]) {
 		*indexL = *indexR = (u16) (listSize - 1);
 		return true;
 	}

 	for (i = 0; i < listSize - 1; i++) {
 		if (pList[i] == target) {
 			*indexL = *indexR = i;
 			return true;
 		}
 		if (target < pList[i + 1]) {
 			*indexL = i;
 			*indexR = (u16) (i + 1);
 			return false;
 		}
 	}
 	return false;
 }

 void ath9k_hw_usb_gen_fill_eeprom(struct ath_hw *ah, u16 *eep_data,
 				  int eep_start_loc, int size)
 {
 	int i = 0, j, addr;
 	u32 addrdata[8];
 	u32 data[8];

 	for (addr = 0; addr < size; addr++) {
 		addrdata[i] = AR5416_EEPROM_OFFSET +
 			((addr + eep_start_loc) << AR5416_EEPROM_S);
 		i++;
 		if (i == 8) {
 			REG_READ_MULTI(ah, addrdata, data, i);

 			for (j = 0; j < i; j++) {
 				*eep_data = data[j];
 				eep_data++;
 			}
 			i = 0;
 		}
 	}

 	if (i != 0) {
 		REG_READ_MULTI(ah, addrdata, data, i);

 		for (j = 0; j < i; j++) {
 			*eep_data = data[j];
 			eep_data++;
 		}
 	}
 }

 static bool ath9k_hw_nvram_read_blob(struct ath_hw *ah, u32 off,
 				     u16 *data)
 {
 	u16 *blob_data;

 	if (off * sizeof(u16) > ah->eeprom_blob->size)
 		return false;

 	blob_data = (u16 *)ah->eeprom_blob->data;
 	*data =  blob_data[off];
 	return true;
 }

 bool ath9k_hw_nvram_read(struct ath_hw *ah, u32 off, u16 *data)
 {
 	struct ath_common *common = ath9k_hw_common(ah);
 	bool ret;

 	if (ah->eeprom_blob)
 		ret = ath9k_hw_nvram_read_blob(ah, off, data);
 	else
 		ret = common->bus_ops->eeprom_read(common, off, data);

 	if (!ret)
 		ath_dbg(common, EEPROM,
 			"unable to read eeprom region at offset %u\n", off);

 	return ret;
 }

 void ath9k_hw_fill_vpd_table(u8 pwrMin, u8 pwrMax, u8 *pPwrList,
 			     u8 *pVpdList, u16 numIntercepts,
 			     u8 *pRetVpdList)
 {
 	u16 i, k;
 	u8 currPwr = pwrMin;
 	u16 idxL = 0, idxR = 0;

 	for (i = 0; i <= (pwrMax - pwrMin) / 2; i++) {
 		ath9k_hw_get_lower_upper_index(currPwr, pPwrList,
 					       numIntercepts, &(idxL),
 					       &(idxR));
 		if (idxR < 1)
 			idxR = 1;
 		if (idxL == numIntercepts - 1)
 			idxL = (u16) (numIntercepts - 2);
 		if (pPwrList[idxL] == pPwrList[idxR])
 			k = pVpdList[idxL];
 		else
 			k = (u16)(((currPwr - pPwrList[idxL]) * pVpdList[idxR] +
 				   (pPwrList[idxR] - currPwr) * pVpdList[idxL]) /
 				  (pPwrList[idxR] - pPwrList[idxL]));
 		pRetVpdList[i] = (u8) k;
 		currPwr += 2;
 	}
 }

 void ath9k_hw_get_legacy_target_powers(struct ath_hw *ah,
 				       struct ath9k_channel *chan,
 				       struct cal_target_power_leg *powInfo,
 				       u16 numChannels,
 				       struct cal_target_power_leg *pNewPower,
 				       u16 numRates, bool isExtTarget)
 {
 	struct chan_centers centers;
 	u16 clo, chi;
 	int i;
 	int matchIndex = -1, lowIndex = -1;
 	u16 freq;

 	ath9k_hw_get_channel_centers(ah, chan, &centers);
 	freq = (isExtTarget) ? centers.ext_center : centers.ctl_center;

 	if (freq <= ath9k_hw_fbin2freq(powInfo[0].bChannel,
 				       IS_CHAN_2GHZ(chan))) {
 		matchIndex = 0;
 	} else {
 		for (i = 0; (i < numChannels) &&
 			     (powInfo[i].bChannel != AR5416_BCHAN_UNUSED); i++) {
 			if (freq == ath9k_hw_fbin2freq(powInfo[i].bChannel,
 						       IS_CHAN_2GHZ(chan))) {
 				matchIndex = i;
 				break;
 			} else if (freq < ath9k_hw_fbin2freq(powInfo[i].bChannel,
 						IS_CHAN_2GHZ(chan)) && i > 0 &&
 				   freq > ath9k_hw_fbin2freq(powInfo[i - 1].bChannel,
 						IS_CHAN_2GHZ(chan))) {
 				lowIndex = i - 1;
 				break;
 			}
 		}
 		if ((matchIndex == -1) && (lowIndex == -1))
 			matchIndex = i - 1;
 	}

 	if (matchIndex != -1) {
 		*pNewPower = powInfo[matchIndex];
 	} else {
 		clo = ath9k_hw_fbin2freq(powInfo[lowIndex].bChannel,
 					 IS_CHAN_2GHZ(chan));
 		chi = ath9k_hw_fbin2freq(powInfo[lowIndex + 1].bChannel,
 					 IS_CHAN_2GHZ(chan));

 		for (i = 0; i < numRates; i++) {
 			pNewPower->tPow2x[i] =
 				(u8)ath9k_hw_interpolate(freq, clo, chi,
 						powInfo[lowIndex].tPow2x[i],
 						powInfo[lowIndex + 1].tPow2x[i]);
 		}
 	}
 }

 void ath9k_hw_get_target_powers(struct ath_hw *ah,
 				struct ath9k_channel *chan,
 				struct cal_target_power_ht *powInfo,
 				u16 numChannels,
 				struct cal_target_power_ht *pNewPower,
 				u16 numRates, bool isHt40Target)
 {
 	struct chan_centers centers;
 	u16 clo, chi;
 	int i;
 	int matchIndex = -1, lowIndex = -1;
 	u16 freq;

 	ath9k_hw_get_channel_centers(ah, chan, &centers);
 	freq = isHt40Target ? centers.synth_center : centers.ctl_center;

 	if (freq <= ath9k_hw_fbin2freq(powInfo[0].bChannel, IS_CHAN_2GHZ(chan))) {
 		matchIndex = 0;
 	} else {
 		for (i = 0; (i < numChannels) &&
 			     (powInfo[i].bChannel != AR5416_BCHAN_UNUSED); i++) {
 			if (freq == ath9k_hw_fbin2freq(powInfo[i].bChannel,
 						       IS_CHAN_2GHZ(chan))) {
 				matchIndex = i;
 				break;
 			} else
 				if (freq < ath9k_hw_fbin2freq(powInfo[i].bChannel,
 						IS_CHAN_2GHZ(chan)) && i > 0 &&
 				    freq > ath9k_hw_fbin2freq(powInfo[i - 1].bChannel,
 						IS_CHAN_2GHZ(chan))) {
 					lowIndex = i - 1;
 					break;
 				}
 		}
 		if ((matchIndex == -1) && (lowIndex == -1))
 			matchIndex = i - 1;
 	}

 	if (matchIndex != -1) {
 		*pNewPower = powInfo[matchIndex];
 	} else {
 		clo = ath9k_hw_fbin2freq(powInfo[lowIndex].bChannel,
 					 IS_CHAN_2GHZ(chan));
 		chi = ath9k_hw_fbin2freq(powInfo[lowIndex + 1].bChannel,
 					 IS_CHAN_2GHZ(chan));

 		for (i = 0; i < numRates; i++) {
 			pNewPower->tPow2x[i] = (u8)ath9k_hw_interpolate(freq,
 						clo, chi,
 						powInfo[lowIndex].tPow2x[i],
 						powInfo[lowIndex + 1].tPow2x[i]);
 		}
 	}
 }

 u16 ath9k_hw_get_max_edge_power(u16 freq, struct cal_ctl_edges *pRdEdgesPower,
 				bool is2GHz, int num_band_edges)
 {
 	u16 twiceMaxEdgePower = MAX_RATE_POWER;
 	int i;

 	for (i = 0; (i < num_band_edges) &&
 		     (pRdEdgesPower[i].bChannel != AR5416_BCHAN_UNUSED); i++) {
 		if (freq == ath9k_hw_fbin2freq(pRdEdgesPower[i].bChannel, is2GHz)) {
 			twiceMaxEdgePower = CTL_EDGE_TPOWER(pRdEdgesPower[i].ctl);
 			break;
 		} else if ((i > 0) &&
 			   (freq < ath9k_hw_fbin2freq(pRdEdgesPower[i].bChannel,
 						      is2GHz))) {
 			if (ath9k_hw_fbin2freq(pRdEdgesPower[i - 1].bChannel,
 					       is2GHz) < freq &&
 			    CTL_EDGE_FLAGS(pRdEdgesPower[i - 1].ctl)) {
 				twiceMaxEdgePower =
 					CTL_EDGE_TPOWER(pRdEdgesPower[i - 1].ctl);
 			}
 			break;
 		}
 	}

 	return twiceMaxEdgePower;
 }

 u16 ath9k_hw_get_scaled_power(struct ath_hw *ah, u16 power_limit,
 			      u8 antenna_reduction)
 {
 	u16 reduction = antenna_reduction;

 	/*
 	 * Reduce scaled Power by number of chains active
 	 * to get the per chain tx power level.
 	 */
 	switch (ar5416_get_ntxchains(ah->txchainmask)) {
 	case 1:
 		break;
 	case 2:
 		reduction += POWER_CORRECTION_FOR_TWO_CHAIN;
 		break;
 	case 3:
 		reduction += POWER_CORRECTION_FOR_THREE_CHAIN;
 		break;
 	}

 	if (power_limit > reduction)
 		power_limit -= reduction;
 	else
 		power_limit = 0;

 	return power_limit;
 }

 void ath9k_hw_update_regulatory_maxpower(struct ath_hw *ah)
 {
 	struct ath_common *common = ath9k_hw_common(ah);
 	struct ath_regulatory *regulatory = ath9k_hw_regulatory(ah);

 	switch (ar5416_get_ntxchains(ah->txchainmask)) {
 	case 1:
 		break;
 	case 2:
 		regulatory->max_power_level += POWER_CORRECTION_FOR_TWO_CHAIN;
 		break;
 	case 3:
 		regulatory->max_power_level += POWER_CORRECTION_FOR_THREE_CHAIN;
 		break;
 	default:
 		ath_dbg(common, EEPROM, "Invalid chainmask configuration\n");
 		break;
 	}
 }

 void ath9k_hw_get_gain_boundaries_pdadcs(struct ath_hw *ah,
 				struct ath9k_channel *chan,
 				void *pRawDataSet,
 				u8 *bChans, u16 availPiers,
 				u16 tPdGainOverlap,
 				u16 *pPdGainBoundaries, u8 *pPDADCValues,
 				u16 numXpdGains)
 {
 	int i, j, k;
 	int16_t ss;
 	u16 idxL = 0, idxR = 0, numPiers;
 	static u8 vpdTableL[AR5416_NUM_PD_GAINS]
 		[AR5416_MAX_PWR_RANGE_IN_HALF_DB];
 	static u8 vpdTableR[AR5416_NUM_PD_GAINS]
 		[AR5416_MAX_PWR_RANGE_IN_HALF_DB];
 	static u8 vpdTableI[AR5416_NUM_PD_GAINS]
 		[AR5416_MAX_PWR_RANGE_IN_HALF_DB];

 	u8 *pVpdL, *pVpdR, *pPwrL, *pPwrR;
 	u8 minPwrT4[AR5416_NUM_PD_GAINS];
 	u8 maxPwrT4[AR5416_NUM_PD_GAINS];
 	int16_t vpdStep;
 	int16_t tmpVal;
 	u16 sizeCurrVpdTable, maxIndex, tgtIndex;
 	bool match;
 	int16_t minDelta = 0;
 	struct chan_centers centers;
 	int pdgain_boundary_default;
 	struct cal_data_per_freq *data_def = pRawDataSet;
 	struct cal_data_per_freq_4k *data_4k = pRawDataSet;
 	struct cal_data_per_freq_ar9287 *data_9287 = pRawDataSet;
 	bool eeprom_4k = AR_SREV_9285(ah) || AR_SREV_9271(ah);
 	int intercepts;

 	if (AR_SREV_9287(ah))
 		intercepts = AR9287_PD_GAIN_ICEPTS;
 	else
 		intercepts = AR5416_PD_GAIN_ICEPTS;

 	memset(&minPwrT4, 0, AR5416_NUM_PD_GAINS);
 	ath9k_hw_get_channel_centers(ah, chan, &centers);

 	for (numPiers = 0; numPiers < availPiers; numPiers++) {
 		if (bChans[numPiers] == AR5416_BCHAN_UNUSED)
 			break;
 	}

 	match = ath9k_hw_get_lower_upper_index((u8)FREQ2FBIN(centers.synth_center,
 							     IS_CHAN_2GHZ(chan)),
 					       bChans, numPiers, &idxL, &idxR);

 	if (match) {
 		if (AR_SREV_9287(ah)) {
 			for (i = 0; i < numXpdGains; i++) {
 				minPwrT4[i] = data_9287[idxL].pwrPdg[i][0];
 				maxPwrT4[i] = data_9287[idxL].pwrPdg[i][intercepts - 1];
 				ath9k_hw_fill_vpd_table(minPwrT4[i], maxPwrT4[i],
 						data_9287[idxL].pwrPdg[i],
 						data_9287[idxL].vpdPdg[i],
 						intercepts,
 						vpdTableI[i]);
 			}
 		} else if (eeprom_4k) {
 			for (i = 0; i < numXpdGains; i++) {
 				minPwrT4[i] = data_4k[idxL].pwrPdg[i][0];
 				maxPwrT4[i] = data_4k[idxL].pwrPdg[i][intercepts - 1];
 				ath9k_hw_fill_vpd_table(minPwrT4[i], maxPwrT4[i],
 						data_4k[idxL].pwrPdg[i],
 						data_4k[idxL].vpdPdg[i],
 						intercepts,
 						vpdTableI[i]);
 			}
 		} else {
 			for (i = 0; i < numXpdGains; i++) {
 				minPwrT4[i] = data_def[idxL].pwrPdg[i][0];
 				maxPwrT4[i] = data_def[idxL].pwrPdg[i][intercepts - 1];
 				ath9k_hw_fill_vpd_table(minPwrT4[i], maxPwrT4[i],
 						data_def[idxL].pwrPdg[i],
 						data_def[idxL].vpdPdg[i],
 						intercepts,
 						vpdTableI[i]);
 			}
 		}
 	} else {
 		for (i = 0; i < numXpdGains; i++) {
 			if (AR_SREV_9287(ah)) {
 				pVpdL = data_9287[idxL].vpdPdg[i];
 				pPwrL = data_9287[idxL].pwrPdg[i];
 				pVpdR = data_9287[idxR].vpdPdg[i];
 				pPwrR = data_9287[idxR].pwrPdg[i];
 			} else if (eeprom_4k) {
 				pVpdL = data_4k[idxL].vpdPdg[i];
 				pPwrL = data_4k[idxL].pwrPdg[i];
 				pVpdR = data_4k[idxR].vpdPdg[i];
 				pPwrR = data_4k[idxR].pwrPdg[i];
 			} else {
 				pVpdL = data_def[idxL].vpdPdg[i];
 				pPwrL = data_def[idxL].pwrPdg[i];
 				pVpdR = data_def[idxR].vpdPdg[i];
 				pPwrR = data_def[idxR].pwrPdg[i];
 			}

 			minPwrT4[i] = max(pPwrL[0], pPwrR[0]);

 			maxPwrT4[i] =
 				min(pPwrL[intercepts - 1],
 				    pPwrR[intercepts - 1]);


 			ath9k_hw_fill_vpd_table(minPwrT4[i], maxPwrT4[i],
 						pPwrL, pVpdL,
 						intercepts,
 						vpdTableL[i]);
 			ath9k_hw_fill_vpd_table(minPwrT4[i], maxPwrT4[i],
 						pPwrR, pVpdR,
 						intercepts,
 						vpdTableR[i]);

 			for (j = 0; j <= (maxPwrT4[i] - minPwrT4[i]) / 2; j++) {
 				vpdTableI[i][j] =
 					(u8)(ath9k_hw_interpolate((u16)
 					     FREQ2FBIN(centers.
 						       synth_center,
 						       IS_CHAN_2GHZ
 						       (chan)),
 					     bChans[idxL], bChans[idxR],
 					     vpdTableL[i][j], vpdTableR[i][j]));
 			}
 		}
 	}

 	k = 0;

 	for (i = 0; i < numXpdGains; i++) {
 		if (i == (numXpdGains - 1))
 			pPdGainBoundaries[i] =
 				(u16)(maxPwrT4[i] / 2);
 		else
 			pPdGainBoundaries[i] =
 				(u16)((maxPwrT4[i] + minPwrT4[i + 1]) / 4);

 		pPdGainBoundaries[i] =
 			min((u16)MAX_RATE_POWER, pPdGainBoundaries[i]);

 		minDelta = 0;

 		if (i == 0) {
 			if (AR_SREV_9280_20_OR_LATER(ah))
 				ss = (int16_t)(0 - (minPwrT4[i] / 2));
 			else
 				ss = 0;
 		} else {
 			ss = (int16_t)((pPdGainBoundaries[i - 1] -
 					(minPwrT4[i] / 2)) -
 				       tPdGainOverlap + 1 + minDelta);
 		}
 		vpdStep = (int16_t)(vpdTableI[i][1] - vpdTableI[i][0]);
 		vpdStep = (int16_t)((vpdStep < 1) ? 1 : vpdStep);

 		while ((ss < 0) && (k < (AR5416_NUM_PDADC_VALUES - 1))) {
 			tmpVal = (int16_t)(vpdTableI[i][0] + ss * vpdStep);
 			pPDADCValues[k++] = (u8)((tmpVal < 0) ? 0 : tmpVal);
 			ss++;
 		}

 		sizeCurrVpdTable = (u8) ((maxPwrT4[i] - minPwrT4[i]) / 2 + 1);
 		tgtIndex = (u8)(pPdGainBoundaries[i] + tPdGainOverlap -
 				(minPwrT4[i] / 2));
 		maxIndex = (tgtIndex < sizeCurrVpdTable) ?
 			tgtIndex : sizeCurrVpdTable;

 		while ((ss < maxIndex) && (k < (AR5416_NUM_PDADC_VALUES - 1))) {
 			pPDADCValues[k++] = vpdTableI[i][ss++];
 		}

 		vpdStep = (int16_t)(vpdTableI[i][sizeCurrVpdTable - 1] -
 				    vpdTableI[i][sizeCurrVpdTable - 2]);
 		vpdStep = (int16_t)((vpdStep < 1) ? 1 : vpdStep);

 		if (tgtIndex >= maxIndex) {
 			while ((ss <= tgtIndex) &&
 			       (k < (AR5416_NUM_PDADC_VALUES - 1))) {
 				tmpVal = (int16_t)((vpdTableI[i][sizeCurrVpdTable - 1] +
 						    (ss - maxIndex + 1) * vpdStep));
 				pPDADCValues[k++] = (u8)((tmpVal > 255) ?
 							 255 : tmpVal);
 				ss++;
 			}
 		}
 	}

 	if (eeprom_4k)
 		pdgain_boundary_default = 58;
 	else
 		pdgain_boundary_default = pPdGainBoundaries[i - 1];

 	while (i < AR5416_PD_GAINS_IN_MASK) {
 		pPdGainBoundaries[i] = pdgain_boundary_default;
 		i++;
 	}

 	while (k < AR5416_NUM_PDADC_VALUES) {
 		pPDADCValues[k] = pPDADCValues[k - 1];
 		k++;
 	}
 }

 int ath9k_hw_eeprom_init(struct ath_hw *ah)
 {
 	int status;

 	if (AR_SREV_9300_20_OR_LATER(ah))
 		ah->eep_ops = &eep_ar9300_ops;
 	else if (AR_SREV_9287(ah)) {
 		ah->eep_ops = &eep_ar9287_ops;
 	} else if (AR_SREV_9285(ah) || AR_SREV_9271(ah)) {
 		ah->eep_ops = &eep_4k_ops;
 	} else {
 		ah->eep_ops = &eep_def_ops;
 	}

 	if (!ah->eep_ops->fill_eeprom(ah))
 		return -EIO;

 	status = ah->eep_ops->check_eeprom(ah);

 	return status;
 }
	/*
	* Copyright (c) 2008-2011 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 "hw.h"

	void ath9k_hw_analog_shift_regwrite(struct ath_hw *ah, u32 reg, u32 val)
	{
	REG_WRITE(ah, reg, val);

	if (ah->config.analog_shiftreg)
	udelay(100);
	}

	void ath9k_hw_analog_shift_rmw(struct ath_hw *ah, u32 reg, u32 mask,
	u32 shift, u32 val)
	{
	REG_RMW(ah, reg, ((val << shift) & mask), mask);

	if (ah->config.analog_shiftreg)
	udelay(100);
	}

	int16_t ath9k_hw_interpolate(u16 target, u16 srcLeft, u16 srcRight,
	int16_t targetLeft, int16_t targetRight)
	{
	int16_t rv;

	if (srcRight == srcLeft) {
	rv = targetLeft;
	} else {
	rv = (int16_t) (((target - srcLeft) * targetRight +
	(srcRight - target) * targetLeft) /
	(srcRight - srcLeft));
	}
	return rv;
	}

	bool ath9k_hw_get_lower_upper_index(u8 target, u8 *pList, u16 listSize,
	u16 indexL, u16 indexR)
	{
	u16 i;

	if (target <= pList[0]) {
	indexL = indexR = 0;
	return true;
	}
	if (target >= pList[listSize - 1]) {
	indexL = indexR = (u16) (listSize - 1);
	return true;
	}

	for (i = 0; i < listSize - 1; i++) {
	if (pList[i] == target) {
	indexL = indexR = i;
	return true;
	}
	if (target < pList[i + 1]) {
	*indexL = i;
	*indexR = (u16) (i + 1);
	return false;
	}
	}
	return false;
	}

	void ath9k_hw_usb_gen_fill_eeprom(struct ath_hw ah, u16 eep_data,
	int eep_start_loc, int size)
	{
	int i = 0, j, addr;
	u32 addrdata[8];
	u32 data[8];

	for (addr = 0; addr < size; addr++) {
	addrdata[i] = AR5416_EEPROM_OFFSET +
	((addr + eep_start_loc) << AR5416_EEPROM_S);
	i++;
	if (i == 8) {
	REG_READ_MULTI(ah, addrdata, data, i);

	for (j = 0; j < i; j++) {
	*eep_data = data[j];
	eep_data++;
	}
	i = 0;
	}
	}

	if (i != 0) {
	REG_READ_MULTI(ah, addrdata, data, i);

	for (j = 0; j < i; j++) {
	*eep_data = data[j];
	eep_data++;
	}
	}
	}

	static bool ath9k_hw_nvram_read_blob(struct ath_hw *ah, u32 off,
	u16 *data)
	{
	u16 *blob_data;

	if (off * sizeof(u16) > ah->eeprom_blob->size)
	return false;

	blob_data = (u16 *)ah->eeprom_blob->data;
	*data = blob_data[off];
	return true;
	}

	bool ath9k_hw_nvram_read(struct ath_hw ah, u32 off, u16 data)
	{
	struct ath_common *common = ath9k_hw_common(ah);
	bool ret;

	if (ah->eeprom_blob)
	ret = ath9k_hw_nvram_read_blob(ah, off, data);
	else
	ret = common->bus_ops->eeprom_read(common, off, data);

	if (!ret)
	ath_dbg(common, EEPROM,
	"unable to read eeprom region at offset %u\n", off);

	return ret;
	}

	void ath9k_hw_fill_vpd_table(u8 pwrMin, u8 pwrMax, u8 *pPwrList,
	u8 *pVpdList, u16 numIntercepts,
	u8 *pRetVpdList)
	{
	u16 i, k;
	u8 currPwr = pwrMin;
	u16 idxL = 0, idxR = 0;

	for (i = 0; i <= (pwrMax - pwrMin) / 2; i++) {
	ath9k_hw_get_lower_upper_index(currPwr, pPwrList,
	numIntercepts, &(idxL),
	&(idxR));
	if (idxR < 1)
	idxR = 1;
	if (idxL == numIntercepts - 1)
	idxL = (u16) (numIntercepts - 2);
	if (pPwrList[idxL] == pPwrList[idxR])
	k = pVpdList[idxL];
	else
	k = (u16)(((currPwr - pPwrList[idxL]) * pVpdList[idxR] +
	(pPwrList[idxR] - currPwr) * pVpdList[idxL]) /
	(pPwrList[idxR] - pPwrList[idxL]));
	pRetVpdList[i] = (u8) k;
	currPwr += 2;
	}
	}

	void ath9k_hw_get_legacy_target_powers(struct ath_hw *ah,
	struct ath9k_channel *chan,
	struct cal_target_power_leg *powInfo,
	u16 numChannels,
	struct cal_target_power_leg *pNewPower,
	u16 numRates, bool isExtTarget)
	{
	struct chan_centers centers;
	u16 clo, chi;
	int i;
	int matchIndex = -1, lowIndex = -1;
	u16 freq;

	ath9k_hw_get_channel_centers(ah, chan, &centers);
	freq = (isExtTarget) ? centers.ext_center : centers.ctl_center;

	if (freq <= ath9k_hw_fbin2freq(powInfo[0].bChannel,
	IS_CHAN_2GHZ(chan))) {
	matchIndex = 0;
	} else {
	for (i = 0; (i < numChannels) &&
	(powInfo[i].bChannel != AR5416_BCHAN_UNUSED); i++) {
	if (freq == ath9k_hw_fbin2freq(powInfo[i].bChannel,
	IS_CHAN_2GHZ(chan))) {
	matchIndex = i;
	break;
	} else if (freq < ath9k_hw_fbin2freq(powInfo[i].bChannel,
	IS_CHAN_2GHZ(chan)) && i > 0 &&
	freq > ath9k_hw_fbin2freq(powInfo[i - 1].bChannel,
	IS_CHAN_2GHZ(chan))) {
	lowIndex = i - 1;
	break;
	}
	}
	if ((matchIndex == -1) && (lowIndex == -1))
	matchIndex = i - 1;
	}

	if (matchIndex != -1) {
	*pNewPower = powInfo[matchIndex];
	} else {
	clo = ath9k_hw_fbin2freq(powInfo[lowIndex].bChannel,
	IS_CHAN_2GHZ(chan));
	chi = ath9k_hw_fbin2freq(powInfo[lowIndex + 1].bChannel,
	IS_CHAN_2GHZ(chan));

	for (i = 0; i < numRates; i++) {
	pNewPower->tPow2x[i] =
	(u8)ath9k_hw_interpolate(freq, clo, chi,
	powInfo[lowIndex].tPow2x[i],
	powInfo[lowIndex + 1].tPow2x[i]);
	}
	}
	}

	void ath9k_hw_get_target_powers(struct ath_hw *ah,
	struct ath9k_channel *chan,
	struct cal_target_power_ht *powInfo,
	u16 numChannels,
	struct cal_target_power_ht *pNewPower,
	u16 numRates, bool isHt40Target)
	{
	struct chan_centers centers;
	u16 clo, chi;
	int i;
	int matchIndex = -1, lowIndex = -1;
	u16 freq;

	ath9k_hw_get_channel_centers(ah, chan, &centers);
	freq = isHt40Target ? centers.synth_center : centers.ctl_center;

	if (freq <= ath9k_hw_fbin2freq(powInfo[0].bChannel, IS_CHAN_2GHZ(chan))) {
	matchIndex = 0;
	} else {
	for (i = 0; (i < numChannels) &&
	(powInfo[i].bChannel != AR5416_BCHAN_UNUSED); i++) {
	if (freq == ath9k_hw_fbin2freq(powInfo[i].bChannel,
	IS_CHAN_2GHZ(chan))) {
	matchIndex = i;
	break;
	} else
	if (freq < ath9k_hw_fbin2freq(powInfo[i].bChannel,
	IS_CHAN_2GHZ(chan)) && i > 0 &&
	freq > ath9k_hw_fbin2freq(powInfo[i - 1].bChannel,
	IS_CHAN_2GHZ(chan))) {
	lowIndex = i - 1;
	break;
	}
	}
	if ((matchIndex == -1) && (lowIndex == -1))
	matchIndex = i - 1;
	}

	if (matchIndex != -1) {
	*pNewPower = powInfo[matchIndex];
	} else {
	clo = ath9k_hw_fbin2freq(powInfo[lowIndex].bChannel,
	IS_CHAN_2GHZ(chan));
	chi = ath9k_hw_fbin2freq(powInfo[lowIndex + 1].bChannel,
	IS_CHAN_2GHZ(chan));

	for (i = 0; i < numRates; i++) {
	pNewPower->tPow2x[i] = (u8)ath9k_hw_interpolate(freq,
	clo, chi,
	powInfo[lowIndex].tPow2x[i],
	powInfo[lowIndex + 1].tPow2x[i]);
	}
	}
	}

	u16 ath9k_hw_get_max_edge_power(u16 freq, struct cal_ctl_edges *pRdEdgesPower,
	bool is2GHz, int num_band_edges)
	{
	u16 twiceMaxEdgePower = MAX_RATE_POWER;
	int i;

	for (i = 0; (i < num_band_edges) &&
	(pRdEdgesPower[i].bChannel != AR5416_BCHAN_UNUSED); i++) {
	if (freq == ath9k_hw_fbin2freq(pRdEdgesPower[i].bChannel, is2GHz)) {
	twiceMaxEdgePower = CTL_EDGE_TPOWER(pRdEdgesPower[i].ctl);
	break;
	} else if ((i > 0) &&
	(freq < ath9k_hw_fbin2freq(pRdEdgesPower[i].bChannel,
	is2GHz))) {
	if (ath9k_hw_fbin2freq(pRdEdgesPower[i - 1].bChannel,
	is2GHz) < freq &&
	CTL_EDGE_FLAGS(pRdEdgesPower[i - 1].ctl)) {
	twiceMaxEdgePower =
	CTL_EDGE_TPOWER(pRdEdgesPower[i - 1].ctl);
	}
	break;
	}
	}

	return twiceMaxEdgePower;
	}

	u16 ath9k_hw_get_scaled_power(struct ath_hw *ah, u16 power_limit,
	u8 antenna_reduction)
	{
	u16 reduction = antenna_reduction;

	/*
	* Reduce scaled Power by number of chains active
	* to get the per chain tx power level.
	*/
	switch (ar5416_get_ntxchains(ah->txchainmask)) {
	case 1:
	break;
	case 2:
	reduction += POWER_CORRECTION_FOR_TWO_CHAIN;
	break;
	case 3:
	reduction += POWER_CORRECTION_FOR_THREE_CHAIN;
	break;
	}

	if (power_limit > reduction)
	power_limit -= reduction;
	else
	power_limit = 0;

	return power_limit;
	}

	void ath9k_hw_update_regulatory_maxpower(struct ath_hw *ah)
	{
	struct ath_common *common = ath9k_hw_common(ah);
	struct ath_regulatory *regulatory = ath9k_hw_regulatory(ah);

	switch (ar5416_get_ntxchains(ah->txchainmask)) {
	case 1:
	break;
	case 2:
	regulatory->max_power_level += POWER_CORRECTION_FOR_TWO_CHAIN;
	break;
	case 3:
	regulatory->max_power_level += POWER_CORRECTION_FOR_THREE_CHAIN;
	break;
	default:
	ath_dbg(common, EEPROM, "Invalid chainmask configuration\n");
	break;
	}
	}

	void ath9k_hw_get_gain_boundaries_pdadcs(struct ath_hw *ah,
	struct ath9k_channel *chan,
	void *pRawDataSet,
	u8 *bChans, u16 availPiers,
	u16 tPdGainOverlap,
	u16 pPdGainBoundaries, u8 pPDADCValues,
	u16 numXpdGains)
	{
	int i, j, k;
	int16_t ss;
	u16 idxL = 0, idxR = 0, numPiers;
	static u8 vpdTableL[AR5416_NUM_PD_GAINS]
	[AR5416_MAX_PWR_RANGE_IN_HALF_DB];
	static u8 vpdTableR[AR5416_NUM_PD_GAINS]
	[AR5416_MAX_PWR_RANGE_IN_HALF_DB];
	static u8 vpdTableI[AR5416_NUM_PD_GAINS]
	[AR5416_MAX_PWR_RANGE_IN_HALF_DB];

	u8 pVpdL, pVpdR, pPwrL, pPwrR;
	u8 minPwrT4[AR5416_NUM_PD_GAINS];
	u8 maxPwrT4[AR5416_NUM_PD_GAINS];
	int16_t vpdStep;
	int16_t tmpVal;
	u16 sizeCurrVpdTable, maxIndex, tgtIndex;
	bool match;
	int16_t minDelta = 0;
	struct chan_centers centers;
	int pdgain_boundary_default;
	struct cal_data_per_freq *data_def = pRawDataSet;
	struct cal_data_per_freq_4k *data_4k = pRawDataSet;
	struct cal_data_per_freq_ar9287 *data_9287 = pRawDataSet;
	bool eeprom_4k = AR_SREV_9285(ah) \|\| AR_SREV_9271(ah);
	int intercepts;

	if (AR_SREV_9287(ah))
	intercepts = AR9287_PD_GAIN_ICEPTS;
	else
	intercepts = AR5416_PD_GAIN_ICEPTS;

	memset(&minPwrT4, 0, AR5416_NUM_PD_GAINS);
	ath9k_hw_get_channel_centers(ah, chan, &centers);

	for (numPiers = 0; numPiers < availPiers; numPiers++) {
	if (bChans[numPiers] == AR5416_BCHAN_UNUSED)
	break;
	}

	match = ath9k_hw_get_lower_upper_index((u8)FREQ2FBIN(centers.synth_center,
	IS_CHAN_2GHZ(chan)),
	bChans, numPiers, &idxL, &idxR);

	if (match) {
	if (AR_SREV_9287(ah)) {
	for (i = 0; i < numXpdGains; i++) {
	minPwrT4[i] = data_9287[idxL].pwrPdg[i][0];
	maxPwrT4[i] = data_9287[idxL].pwrPdg[i][intercepts - 1];
	ath9k_hw_fill_vpd_table(minPwrT4[i], maxPwrT4[i],
	data_9287[idxL].pwrPdg[i],
	data_9287[idxL].vpdPdg[i],
	intercepts,
	vpdTableI[i]);
	}
	} else if (eeprom_4k) {
	for (i = 0; i < numXpdGains; i++) {
	minPwrT4[i] = data_4k[idxL].pwrPdg[i][0];
	maxPwrT4[i] = data_4k[idxL].pwrPdg[i][intercepts - 1];
	ath9k_hw_fill_vpd_table(minPwrT4[i], maxPwrT4[i],
	data_4k[idxL].pwrPdg[i],
	data_4k[idxL].vpdPdg[i],
	intercepts,
	vpdTableI[i]);
	}
	} else {
	for (i = 0; i < numXpdGains; i++) {
	minPwrT4[i] = data_def[idxL].pwrPdg[i][0];
	maxPwrT4[i] = data_def[idxL].pwrPdg[i][intercepts - 1];
	ath9k_hw_fill_vpd_table(minPwrT4[i], maxPwrT4[i],
	data_def[idxL].pwrPdg[i],
	data_def[idxL].vpdPdg[i],
	intercepts,
	vpdTableI[i]);
	}
	}
	} else {
	for (i = 0; i < numXpdGains; i++) {
	if (AR_SREV_9287(ah)) {
	pVpdL = data_9287[idxL].vpdPdg[i];
	pPwrL = data_9287[idxL].pwrPdg[i];
	pVpdR = data_9287[idxR].vpdPdg[i];
	pPwrR = data_9287[idxR].pwrPdg[i];
	} else if (eeprom_4k) {
	pVpdL = data_4k[idxL].vpdPdg[i];
	pPwrL = data_4k[idxL].pwrPdg[i];
	pVpdR = data_4k[idxR].vpdPdg[i];
	pPwrR = data_4k[idxR].pwrPdg[i];
	} else {
	pVpdL = data_def[idxL].vpdPdg[i];
	pPwrL = data_def[idxL].pwrPdg[i];
	pVpdR = data_def[idxR].vpdPdg[i];
	pPwrR = data_def[idxR].pwrPdg[i];
	}

	minPwrT4[i] = max(pPwrL[0], pPwrR[0]);

	maxPwrT4[i] =
	min(pPwrL[intercepts - 1],
	pPwrR[intercepts - 1]);


	ath9k_hw_fill_vpd_table(minPwrT4[i], maxPwrT4[i],
	pPwrL, pVpdL,
	intercepts,
	vpdTableL[i]);
	ath9k_hw_fill_vpd_table(minPwrT4[i], maxPwrT4[i],
	pPwrR, pVpdR,
	intercepts,
	vpdTableR[i]);

	for (j = 0; j <= (maxPwrT4[i] - minPwrT4[i]) / 2; j++) {
	vpdTableI[i][j] =
	(u8)(ath9k_hw_interpolate((u16)
	FREQ2FBIN(centers.
	synth_center,
	IS_CHAN_2GHZ
	(chan)),
	bChans[idxL], bChans[idxR],
	vpdTableL[i][j], vpdTableR[i][j]));
	}
	}
	}

	k = 0;

	for (i = 0; i < numXpdGains; i++) {
	if (i == (numXpdGains - 1))
	pPdGainBoundaries[i] =
	(u16)(maxPwrT4[i] / 2);
	else
	pPdGainBoundaries[i] =
	(u16)((maxPwrT4[i] + minPwrT4[i + 1]) / 4);

	pPdGainBoundaries[i] =
	min((u16)MAX_RATE_POWER, pPdGainBoundaries[i]);

	minDelta = 0;

	if (i == 0) {
	if (AR_SREV_9280_20_OR_LATER(ah))
	ss = (int16_t)(0 - (minPwrT4[i] / 2));
	else
	ss = 0;
	} else {
	ss = (int16_t)((pPdGainBoundaries[i - 1] -
	(minPwrT4[i] / 2)) -
	tPdGainOverlap + 1 + minDelta);
	}
	vpdStep = (int16_t)(vpdTableI[i][1] - vpdTableI[i][0]);
	vpdStep = (int16_t)((vpdStep < 1) ? 1 : vpdStep);

	while ((ss < 0) && (k < (AR5416_NUM_PDADC_VALUES - 1))) {
	tmpVal = (int16_t)(vpdTableI[i][0] + ss * vpdStep);
	pPDADCValues[k++] = (u8)((tmpVal < 0) ? 0 : tmpVal);
	ss++;
	}

	sizeCurrVpdTable = (u8) ((maxPwrT4[i] - minPwrT4[i]) / 2 + 1);
	tgtIndex = (u8)(pPdGainBoundaries[i] + tPdGainOverlap -
	(minPwrT4[i] / 2));
	maxIndex = (tgtIndex < sizeCurrVpdTable) ?
	tgtIndex : sizeCurrVpdTable;

	while ((ss < maxIndex) && (k < (AR5416_NUM_PDADC_VALUES - 1))) {
	pPDADCValues[k++] = vpdTableI[i][ss++];
	}

	vpdStep = (int16_t)(vpdTableI[i][sizeCurrVpdTable - 1] -
	vpdTableI[i][sizeCurrVpdTable - 2]);
	vpdStep = (int16_t)((vpdStep < 1) ? 1 : vpdStep);

	if (tgtIndex >= maxIndex) {
	while ((ss <= tgtIndex) &&
	(k < (AR5416_NUM_PDADC_VALUES - 1))) {
	tmpVal = (int16_t)((vpdTableI[i][sizeCurrVpdTable - 1] +
	(ss - maxIndex + 1) * vpdStep));
	pPDADCValues[k++] = (u8)((tmpVal > 255) ?
	255 : tmpVal);
	ss++;
	}
	}
	}

	if (eeprom_4k)
	pdgain_boundary_default = 58;
	else
	pdgain_boundary_default = pPdGainBoundaries[i - 1];

	while (i < AR5416_PD_GAINS_IN_MASK) {
	pPdGainBoundaries[i] = pdgain_boundary_default;
	i++;
	}

	while (k < AR5416_NUM_PDADC_VALUES) {
	pPDADCValues[k] = pPDADCValues[k - 1];
	k++;
	}
	}

	int ath9k_hw_eeprom_init(struct ath_hw *ah)
	{
	int status;

	if (AR_SREV_9300_20_OR_LATER(ah))
	ah->eep_ops = &eep_ar9300_ops;
	else if (AR_SREV_9287(ah)) {
	ah->eep_ops = &eep_ar9287_ops;
	} else if (AR_SREV_9285(ah) \|\| AR_SREV_9271(ah)) {
	ah->eep_ops = &eep_4k_ops;
	} else {
	ah->eep_ops = &eep_def_ops;
	}

	if (!ah->eep_ops->fill_eeprom(ah))
	return -EIO;

	status = ah->eep_ops->check_eeprom(ah);

	return status;
	}