drivers/net/wireless/ath/ath9k/eeprom.c - maze/linux - Git at Google

 /*
  * Copyright (c) 2008-2009 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"

 static inline u16 ath9k_hw_fbin2freq(u8 fbin, bool is2GHz)
 {
 	if (fbin == AR5416_BCHAN_UNUSED)
 		return fbin;

 	return (u16) ((is2GHz) ? (2300 + fbin) : (4800 + 5 * fbin));
 }

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

 	regVal = REG_READ(ah, reg) & ~mask;
 	regVal |= (val << shift) & mask;

 	REG_WRITE(ah, reg, regVal);

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

 	return;
 }

 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;
 }

 bool ath9k_hw_nvram_read(struct ath_common *common, u32 off, u16 *data)
 {
 	return common->bus_ops->eeprom_read(common, off, data);
 }

 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 = AR5416_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 = pRdEdgesPower[i].tPower;
 			break;
 		} else if ((i > 0) &&
 			   (freq < ath9k_hw_fbin2freq(pRdEdgesPower[i].bChannel,
 						      is2GHz))) {
 			if (ath9k_hw_fbin2freq(pRdEdgesPower[i - 1].bChannel,
 					       is2GHz) < freq &&
 			    pRdEdgesPower[i - 1].flag) {
 				twiceMaxEdgePower =
 					pRdEdgesPower[i - 1].tPower;
 			}
 			break;
 		}
 	}

 	return twiceMaxEdgePower;
 }

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

 	if (AR_SREV_9287(ah)) {
 		ah->eep_map = EEP_MAP_AR9287;
 		ah->eep_ops = &eep_AR9287_ops;
 	} else if (AR_SREV_9285(ah) || AR_SREV_9271(ah)) {
 		ah->eep_map = EEP_MAP_4KBITS;
 		ah->eep_ops = &eep_4k_ops;
 	} else {
 		ah->eep_map = EEP_MAP_DEFAULT;
 		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) 2008-2009 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"

	static inline u16 ath9k_hw_fbin2freq(u8 fbin, bool is2GHz)
	{
	if (fbin == AR5416_BCHAN_UNUSED)
	return fbin;

	return (u16) ((is2GHz) ? (2300 + fbin) : (4800 + 5 * fbin));
	}

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

	regVal = REG_READ(ah, reg) & ~mask;
	regVal \|= (val << shift) & mask;

	REG_WRITE(ah, reg, regVal);

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

	return;
	}

	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;
	}

	bool ath9k_hw_nvram_read(struct ath_common common, u32 off, u16 data)
	{
	return common->bus_ops->eeprom_read(common, off, data);
	}

	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 = AR5416_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 = pRdEdgesPower[i].tPower;
	break;
	} else if ((i > 0) &&
	(freq < ath9k_hw_fbin2freq(pRdEdgesPower[i].bChannel,
	is2GHz))) {
	if (ath9k_hw_fbin2freq(pRdEdgesPower[i - 1].bChannel,
	is2GHz) < freq &&
	pRdEdgesPower[i - 1].flag) {
	twiceMaxEdgePower =
	pRdEdgesPower[i - 1].tPower;
	}
	break;
	}
	}

	return twiceMaxEdgePower;
	}

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

	if (AR_SREV_9287(ah)) {
	ah->eep_map = EEP_MAP_AR9287;
	ah->eep_ops = &eep_AR9287_ops;
	} else if (AR_SREV_9285(ah) \|\| AR_SREV_9271(ah)) {
	ah->eep_map = EEP_MAP_4KBITS;
	ah->eep_ops = &eep_4k_ops;
	} else {
	ah->eep_map = EEP_MAP_DEFAULT;
	ah->eep_ops = &eep_def_ops;
	}

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

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

	return status;
	}