drivers/net/wireless/ath9k/phy.c - android_kernel_htc_msm8960 - Gitiles

 /*
  * 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 "ath9k.h"

 void
 ath9k_hw_write_regs(struct ath_hw *ah, u32 modesIndex, u32 freqIndex,
 		    int regWrites)
 {
 	REG_WRITE_ARRAY(&ah->iniBB_RfGain, freqIndex, regWrites);
 }

 bool
 ath9k_hw_set_channel(struct ath_hw *ah, struct ath9k_channel *chan)
 {
 	u32 channelSel = 0;
 	u32 bModeSynth = 0;
 	u32 aModeRefSel = 0;
 	u32 reg32 = 0;
 	u16 freq;
 	struct chan_centers centers;

 	ath9k_hw_get_channel_centers(ah, chan, &centers);
 	freq = centers.synth_center;

 	if (freq < 4800) {
 		u32 txctl;

 		if (((freq - 2192) % 5) == 0) {
 			channelSel = ((freq - 672) * 2 - 3040) / 10;
 			bModeSynth = 0;
 		} else if (((freq - 2224) % 5) == 0) {
 			channelSel = ((freq - 704) * 2 - 3040) / 10;
 			bModeSynth = 1;
 		} else {
 			DPRINTF(ah->ah_sc, ATH_DBG_CHANNEL,
 				"Invalid channel %u MHz\n", freq);
 			return false;
 		}

 		channelSel = (channelSel << 2) & 0xff;
 		channelSel = ath9k_hw_reverse_bits(channelSel, 8);

 		txctl = REG_READ(ah, AR_PHY_CCK_TX_CTRL);
 		if (freq == 2484) {

 			REG_WRITE(ah, AR_PHY_CCK_TX_CTRL,
 				  txctl | AR_PHY_CCK_TX_CTRL_JAPAN);
 		} else {
 			REG_WRITE(ah, AR_PHY_CCK_TX_CTRL,
 				  txctl & ~AR_PHY_CCK_TX_CTRL_JAPAN);
 		}

 	} else if ((freq % 20) == 0 && freq >= 5120) {
 		channelSel =
 		    ath9k_hw_reverse_bits(((freq - 4800) / 20 << 2), 8);
 		aModeRefSel = ath9k_hw_reverse_bits(1, 2);
 	} else if ((freq % 10) == 0) {
 		channelSel =
 		    ath9k_hw_reverse_bits(((freq - 4800) / 10 << 1), 8);
 		if (AR_SREV_9100(ah) || AR_SREV_9160_10_OR_LATER(ah))
 			aModeRefSel = ath9k_hw_reverse_bits(2, 2);
 		else
 			aModeRefSel = ath9k_hw_reverse_bits(1, 2);
 	} else if ((freq % 5) == 0) {
 		channelSel = ath9k_hw_reverse_bits((freq - 4800) / 5, 8);
 		aModeRefSel = ath9k_hw_reverse_bits(1, 2);
 	} else {
 		DPRINTF(ah->ah_sc, ATH_DBG_CHANNEL,
 			"Invalid channel %u MHz\n", freq);
 		return false;
 	}

 	reg32 =
 	    (channelSel << 8) | (aModeRefSel << 2) | (bModeSynth << 1) |
 	    (1 << 5) | 0x1;

 	REG_WRITE(ah, AR_PHY(0x37), reg32);

 	ah->curchan = chan;
 	ah->curchan_rad_index = -1;

 	return true;
 }

 bool
 ath9k_hw_ar9280_set_channel(struct ath_hw *ah,
 			    struct ath9k_channel *chan)
 {
 	u16 bMode, fracMode, aModeRefSel = 0;
 	u32 freq, ndiv, channelSel = 0, channelFrac = 0, reg32 = 0;
 	struct chan_centers centers;
 	u32 refDivA = 24;

 	ath9k_hw_get_channel_centers(ah, chan, &centers);
 	freq = centers.synth_center;

 	reg32 = REG_READ(ah, AR_PHY_SYNTH_CONTROL);
 	reg32 &= 0xc0000000;

 	if (freq < 4800) {
 		u32 txctl;

 		bMode = 1;
 		fracMode = 1;
 		aModeRefSel = 0;
 		channelSel = (freq * 0x10000) / 15;

 		txctl = REG_READ(ah, AR_PHY_CCK_TX_CTRL);
 		if (freq == 2484) {

 			REG_WRITE(ah, AR_PHY_CCK_TX_CTRL,
 				  txctl | AR_PHY_CCK_TX_CTRL_JAPAN);
 		} else {
 			REG_WRITE(ah, AR_PHY_CCK_TX_CTRL,
 				  txctl & ~AR_PHY_CCK_TX_CTRL_JAPAN);
 		}
 	} else {
 		bMode = 0;
 		fracMode = 0;

 		switch(ah->eep_ops->get_eeprom(ah, EEP_FRAC_N_5G)) {
 		case 0:
 			if ((freq % 20) == 0) {
 				aModeRefSel = 3;
 			} else if ((freq % 10) == 0) {
 				aModeRefSel = 2;
 			}
 			if (aModeRefSel)
 				break;
 		case 1:
 		default:
 			aModeRefSel = 0;
 			fracMode = 1;
 			refDivA = 1;
 			channelSel = (freq * 0x8000) / 15;

 			REG_RMW_FIELD(ah, AR_AN_SYNTH9,
 				      AR_AN_SYNTH9_REFDIVA, refDivA);

 		}

 		if (!fracMode) {
 			ndiv = (freq * (refDivA >> aModeRefSel)) / 60;
 			channelSel = ndiv & 0x1ff;
 			channelFrac = (ndiv & 0xfffffe00) * 2;
 			channelSel = (channelSel << 17) | channelFrac;
 		}
 	}

 	reg32 = reg32 |
 	    (bMode << 29) |
 	    (fracMode << 28) | (aModeRefSel << 26) | (channelSel);

 	REG_WRITE(ah, AR_PHY_SYNTH_CONTROL, reg32);

 	ah->curchan = chan;
 	ah->curchan_rad_index = -1;

 	return true;
 }

 static void
 ath9k_phy_modify_rx_buffer(u32 *rfBuf, u32 reg32,
 			   u32 numBits, u32 firstBit,
 			   u32 column)
 {
 	u32 tmp32, mask, arrayEntry, lastBit;
 	int32_t bitPosition, bitsLeft;

 	tmp32 = ath9k_hw_reverse_bits(reg32, numBits);
 	arrayEntry = (firstBit - 1) / 8;
 	bitPosition = (firstBit - 1) % 8;
 	bitsLeft = numBits;
 	while (bitsLeft > 0) {
 		lastBit = (bitPosition + bitsLeft > 8) ?
 		    8 : bitPosition + bitsLeft;
 		mask = (((1 << lastBit) - 1) ^ ((1 << bitPosition) - 1)) <<
 		    (column * 8);
 		rfBuf[arrayEntry] &= ~mask;
 		rfBuf[arrayEntry] |= ((tmp32 << bitPosition) <<
 				      (column * 8)) & mask;
 		bitsLeft -= 8 - bitPosition;
 		tmp32 = tmp32 >> (8 - bitPosition);
 		bitPosition = 0;
 		arrayEntry++;
 	}
 }

 bool
 ath9k_hw_set_rf_regs(struct ath_hw *ah, struct ath9k_channel *chan,
 		     u16 modesIndex)
 {
 	u32 eepMinorRev;
 	u32 ob5GHz = 0, db5GHz = 0;
 	u32 ob2GHz = 0, db2GHz = 0;
 	int regWrites = 0;

 	if (AR_SREV_9280_10_OR_LATER(ah))
 		return true;

 	eepMinorRev = ah->eep_ops->get_eeprom(ah, EEP_MINOR_REV);

 	RF_BANK_SETUP(ah->analogBank0Data, &ah->iniBank0, 1);

 	RF_BANK_SETUP(ah->analogBank1Data, &ah->iniBank1, 1);

 	RF_BANK_SETUP(ah->analogBank2Data, &ah->iniBank2, 1);

 	RF_BANK_SETUP(ah->analogBank3Data, &ah->iniBank3,
 		      modesIndex);
 	{
 		int i;
 		for (i = 0; i < ah->iniBank6TPC.ia_rows; i++) {
 			ah->analogBank6Data[i] =
 			    INI_RA(&ah->iniBank6TPC, i, modesIndex);
 		}
 	}

 	if (eepMinorRev >= 2) {
 		if (IS_CHAN_2GHZ(chan)) {
 			ob2GHz = ah->eep_ops->get_eeprom(ah, EEP_OB_2);
 			db2GHz = ah->eep_ops->get_eeprom(ah, EEP_DB_2);
 			ath9k_phy_modify_rx_buffer(ah->analogBank6Data,
 						   ob2GHz, 3, 197, 0);
 			ath9k_phy_modify_rx_buffer(ah->analogBank6Data,
 						   db2GHz, 3, 194, 0);
 		} else {
 			ob5GHz = ah->eep_ops->get_eeprom(ah, EEP_OB_5);
 			db5GHz = ah->eep_ops->get_eeprom(ah, EEP_DB_5);
 			ath9k_phy_modify_rx_buffer(ah->analogBank6Data,
 						   ob5GHz, 3, 203, 0);
 			ath9k_phy_modify_rx_buffer(ah->analogBank6Data,
 						   db5GHz, 3, 200, 0);
 		}
 	}

 	RF_BANK_SETUP(ah->analogBank7Data, &ah->iniBank7, 1);

 	REG_WRITE_RF_ARRAY(&ah->iniBank0, ah->analogBank0Data,
 			   regWrites);
 	REG_WRITE_RF_ARRAY(&ah->iniBank1, ah->analogBank1Data,
 			   regWrites);
 	REG_WRITE_RF_ARRAY(&ah->iniBank2, ah->analogBank2Data,
 			   regWrites);
 	REG_WRITE_RF_ARRAY(&ah->iniBank3, ah->analogBank3Data,
 			   regWrites);
 	REG_WRITE_RF_ARRAY(&ah->iniBank6TPC, ah->analogBank6Data,
 			   regWrites);
 	REG_WRITE_RF_ARRAY(&ah->iniBank7, ah->analogBank7Data,
 			   regWrites);

 	return true;
 }

 void
 ath9k_hw_rfdetach(struct ath_hw *ah)
 {
 	if (ah->analogBank0Data != NULL) {
 		kfree(ah->analogBank0Data);
 		ah->analogBank0Data = NULL;
 	}
 	if (ah->analogBank1Data != NULL) {
 		kfree(ah->analogBank1Data);
 		ah->analogBank1Data = NULL;
 	}
 	if (ah->analogBank2Data != NULL) {
 		kfree(ah->analogBank2Data);
 		ah->analogBank2Data = NULL;
 	}
 	if (ah->analogBank3Data != NULL) {
 		kfree(ah->analogBank3Data);
 		ah->analogBank3Data = NULL;
 	}
 	if (ah->analogBank6Data != NULL) {
 		kfree(ah->analogBank6Data);
 		ah->analogBank6Data = NULL;
 	}
 	if (ah->analogBank6TPCData != NULL) {
 		kfree(ah->analogBank6TPCData);
 		ah->analogBank6TPCData = NULL;
 	}
 	if (ah->analogBank7Data != NULL) {
 		kfree(ah->analogBank7Data);
 		ah->analogBank7Data = NULL;
 	}
 	if (ah->addac5416_21 != NULL) {
 		kfree(ah->addac5416_21);
 		ah->addac5416_21 = NULL;
 	}
 	if (ah->bank6Temp != NULL) {
 		kfree(ah->bank6Temp);
 		ah->bank6Temp = NULL;
 	}
 }

 bool ath9k_hw_init_rf(struct ath_hw *ah, int *status)
 {
 	if (!AR_SREV_9280_10_OR_LATER(ah)) {
 		ah->analogBank0Data =
 		    kzalloc((sizeof(u32) *
 			     ah->iniBank0.ia_rows), GFP_KERNEL);
 		ah->analogBank1Data =
 		    kzalloc((sizeof(u32) *
 			     ah->iniBank1.ia_rows), GFP_KERNEL);
 		ah->analogBank2Data =
 		    kzalloc((sizeof(u32) *
 			     ah->iniBank2.ia_rows), GFP_KERNEL);
 		ah->analogBank3Data =
 		    kzalloc((sizeof(u32) *
 			     ah->iniBank3.ia_rows), GFP_KERNEL);
 		ah->analogBank6Data =
 		    kzalloc((sizeof(u32) *
 			     ah->iniBank6.ia_rows), GFP_KERNEL);
 		ah->analogBank6TPCData =
 		    kzalloc((sizeof(u32) *
 			     ah->iniBank6TPC.ia_rows), GFP_KERNEL);
 		ah->analogBank7Data =
 		    kzalloc((sizeof(u32) *
 			     ah->iniBank7.ia_rows), GFP_KERNEL);

 		if (ah->analogBank0Data == NULL
 		    || ah->analogBank1Data == NULL
 		    || ah->analogBank2Data == NULL
 		    || ah->analogBank3Data == NULL
 		    || ah->analogBank6Data == NULL
 		    || ah->analogBank6TPCData == NULL
 		    || ah->analogBank7Data == NULL) {
 			DPRINTF(ah->ah_sc, ATH_DBG_FATAL,
 				"Cannot allocate RF banks\n");
 			*status = -ENOMEM;
 			return false;
 		}

 		ah->addac5416_21 =
 		    kzalloc((sizeof(u32) *
 			     ah->iniAddac.ia_rows *
 			     ah->iniAddac.ia_columns), GFP_KERNEL);
 		if (ah->addac5416_21 == NULL) {
 			DPRINTF(ah->ah_sc, ATH_DBG_FATAL,
 				"Cannot allocate addac5416_21\n");
 			*status = -ENOMEM;
 			return false;
 		}

 		ah->bank6Temp =
 		    kzalloc((sizeof(u32) *
 			     ah->iniBank6.ia_rows), GFP_KERNEL);
 		if (ah->bank6Temp == NULL) {
 			DPRINTF(ah->ah_sc, ATH_DBG_FATAL,
 				"Cannot allocate bank6Temp\n");
 			*status = -ENOMEM;
 			return false;
 		}
 	}

 	return true;
 }

 void
 ath9k_hw_decrease_chain_power(struct ath_hw *ah, struct ath9k_channel *chan)
 {
 	int i, regWrites = 0;
 	u32 bank6SelMask;
 	u32 *bank6Temp = ah->bank6Temp;

 	switch (ah->diversity_control) {
 	case ATH9K_ANT_FIXED_A:
 		bank6SelMask =
 		    (ah->
 		     antenna_switch_swap & ANTSWAP_AB) ? REDUCE_CHAIN_0 :
 		    REDUCE_CHAIN_1;
 		break;
 	case ATH9K_ANT_FIXED_B:
 		bank6SelMask =
 		    (ah->
 		     antenna_switch_swap & ANTSWAP_AB) ? REDUCE_CHAIN_1 :
 		    REDUCE_CHAIN_0;
 		break;
 	case ATH9K_ANT_VARIABLE:
 		return;
 		break;
 	default:
 		return;
 		break;
 	}

 	for (i = 0; i < ah->iniBank6.ia_rows; i++)
 		bank6Temp[i] = ah->analogBank6Data[i];

 	REG_WRITE(ah, AR_PHY_BASE + 0xD8, bank6SelMask);

 	ath9k_phy_modify_rx_buffer(bank6Temp, 1, 1, 189, 0);
 	ath9k_phy_modify_rx_buffer(bank6Temp, 1, 1, 190, 0);
 	ath9k_phy_modify_rx_buffer(bank6Temp, 1, 1, 191, 0);
 	ath9k_phy_modify_rx_buffer(bank6Temp, 1, 1, 192, 0);
 	ath9k_phy_modify_rx_buffer(bank6Temp, 1, 1, 193, 0);
 	ath9k_phy_modify_rx_buffer(bank6Temp, 1, 1, 222, 0);
 	ath9k_phy_modify_rx_buffer(bank6Temp, 1, 1, 245, 0);
 	ath9k_phy_modify_rx_buffer(bank6Temp, 1, 1, 246, 0);
 	ath9k_phy_modify_rx_buffer(bank6Temp, 1, 1, 247, 0);

 	REG_WRITE_RF_ARRAY(&ah->iniBank6, bank6Temp, regWrites);

 	REG_WRITE(ah, AR_PHY_BASE + 0xD8, 0x00000053);
 #ifdef ALTER_SWITCH
 	REG_WRITE(ah, PHY_SWITCH_CHAIN_0,
 		  (REG_READ(ah, PHY_SWITCH_CHAIN_0) & ~0x38)
 		  | ((REG_READ(ah, PHY_SWITCH_CHAIN_0) >> 3) & 0x38));
 #endif
 }
	/*
	* 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 "ath9k.h"

	void
	ath9k_hw_write_regs(struct ath_hw *ah, u32 modesIndex, u32 freqIndex,
	int regWrites)
	{
	REG_WRITE_ARRAY(&ah->iniBB_RfGain, freqIndex, regWrites);
	}

	bool
	ath9k_hw_set_channel(struct ath_hw ah, struct ath9k_channel chan)
	{
	u32 channelSel = 0;
	u32 bModeSynth = 0;
	u32 aModeRefSel = 0;
	u32 reg32 = 0;
	u16 freq;
	struct chan_centers centers;

	ath9k_hw_get_channel_centers(ah, chan, &centers);
	freq = centers.synth_center;

	if (freq < 4800) {
	u32 txctl;

	if (((freq - 2192) % 5) == 0) {
	channelSel = ((freq - 672) * 2 - 3040) / 10;
	bModeSynth = 0;
	} else if (((freq - 2224) % 5) == 0) {
	channelSel = ((freq - 704) * 2 - 3040) / 10;
	bModeSynth = 1;
	} else {
	DPRINTF(ah->ah_sc, ATH_DBG_CHANNEL,
	"Invalid channel %u MHz\n", freq);
	return false;
	}

	channelSel = (channelSel << 2) & 0xff;
	channelSel = ath9k_hw_reverse_bits(channelSel, 8);

	txctl = REG_READ(ah, AR_PHY_CCK_TX_CTRL);
	if (freq == 2484) {

	REG_WRITE(ah, AR_PHY_CCK_TX_CTRL,
	txctl \| AR_PHY_CCK_TX_CTRL_JAPAN);
	} else {
	REG_WRITE(ah, AR_PHY_CCK_TX_CTRL,
	txctl & ~AR_PHY_CCK_TX_CTRL_JAPAN);
	}

	} else if ((freq % 20) == 0 && freq >= 5120) {
	channelSel =
	ath9k_hw_reverse_bits(((freq - 4800) / 20 << 2), 8);
	aModeRefSel = ath9k_hw_reverse_bits(1, 2);
	} else if ((freq % 10) == 0) {
	channelSel =
	ath9k_hw_reverse_bits(((freq - 4800) / 10 << 1), 8);
	if (AR_SREV_9100(ah) \|\| AR_SREV_9160_10_OR_LATER(ah))
	aModeRefSel = ath9k_hw_reverse_bits(2, 2);
	else
	aModeRefSel = ath9k_hw_reverse_bits(1, 2);
	} else if ((freq % 5) == 0) {
	channelSel = ath9k_hw_reverse_bits((freq - 4800) / 5, 8);
	aModeRefSel = ath9k_hw_reverse_bits(1, 2);
	} else {
	DPRINTF(ah->ah_sc, ATH_DBG_CHANNEL,
	"Invalid channel %u MHz\n", freq);
	return false;
	}

	reg32 =
	(channelSel << 8) \| (aModeRefSel << 2) \| (bModeSynth << 1) \|
	(1 << 5) \| 0x1;

	REG_WRITE(ah, AR_PHY(0x37), reg32);

	ah->curchan = chan;
	ah->curchan_rad_index = -1;

	return true;
	}

	bool
	ath9k_hw_ar9280_set_channel(struct ath_hw *ah,
	struct ath9k_channel *chan)
	{
	u16 bMode, fracMode, aModeRefSel = 0;
	u32 freq, ndiv, channelSel = 0, channelFrac = 0, reg32 = 0;
	struct chan_centers centers;
	u32 refDivA = 24;

	ath9k_hw_get_channel_centers(ah, chan, &centers);
	freq = centers.synth_center;

	reg32 = REG_READ(ah, AR_PHY_SYNTH_CONTROL);
	reg32 &= 0xc0000000;

	if (freq < 4800) {
	u32 txctl;

	bMode = 1;
	fracMode = 1;
	aModeRefSel = 0;
	channelSel = (freq * 0x10000) / 15;

	txctl = REG_READ(ah, AR_PHY_CCK_TX_CTRL);
	if (freq == 2484) {

	REG_WRITE(ah, AR_PHY_CCK_TX_CTRL,
	txctl \| AR_PHY_CCK_TX_CTRL_JAPAN);
	} else {
	REG_WRITE(ah, AR_PHY_CCK_TX_CTRL,
	txctl & ~AR_PHY_CCK_TX_CTRL_JAPAN);
	}
	} else {
	bMode = 0;
	fracMode = 0;

	switch(ah->eep_ops->get_eeprom(ah, EEP_FRAC_N_5G)) {
	case 0:
	if ((freq % 20) == 0) {
	aModeRefSel = 3;
	} else if ((freq % 10) == 0) {
	aModeRefSel = 2;
	}
	if (aModeRefSel)
	break;
	case 1:
	default:
	aModeRefSel = 0;
	fracMode = 1;
	refDivA = 1;
	channelSel = (freq * 0x8000) / 15;

	REG_RMW_FIELD(ah, AR_AN_SYNTH9,
	AR_AN_SYNTH9_REFDIVA, refDivA);

	}

	if (!fracMode) {
	ndiv = (freq * (refDivA >> aModeRefSel)) / 60;
	channelSel = ndiv & 0x1ff;
	channelFrac = (ndiv & 0xfffffe00) * 2;
	channelSel = (channelSel << 17) \| channelFrac;
	}
	}

	reg32 = reg32 \|
	(bMode << 29) \|
	(fracMode << 28) \| (aModeRefSel << 26) \| (channelSel);

	REG_WRITE(ah, AR_PHY_SYNTH_CONTROL, reg32);

	ah->curchan = chan;
	ah->curchan_rad_index = -1;

	return true;
	}

	static void
	ath9k_phy_modify_rx_buffer(u32 *rfBuf, u32 reg32,
	u32 numBits, u32 firstBit,
	u32 column)
	{
	u32 tmp32, mask, arrayEntry, lastBit;
	int32_t bitPosition, bitsLeft;

	tmp32 = ath9k_hw_reverse_bits(reg32, numBits);
	arrayEntry = (firstBit - 1) / 8;
	bitPosition = (firstBit - 1) % 8;
	bitsLeft = numBits;
	while (bitsLeft > 0) {
	lastBit = (bitPosition + bitsLeft > 8) ?
	8 : bitPosition + bitsLeft;
	mask = (((1 << lastBit) - 1) ^ ((1 << bitPosition) - 1)) <<
	(column * 8);
	rfBuf[arrayEntry] &= ~mask;
	rfBuf[arrayEntry] \|= ((tmp32 << bitPosition) <<
	(column * 8)) & mask;
	bitsLeft -= 8 - bitPosition;
	tmp32 = tmp32 >> (8 - bitPosition);
	bitPosition = 0;
	arrayEntry++;
	}
	}

	bool
	ath9k_hw_set_rf_regs(struct ath_hw ah, struct ath9k_channel chan,
	u16 modesIndex)
	{
	u32 eepMinorRev;
	u32 ob5GHz = 0, db5GHz = 0;
	u32 ob2GHz = 0, db2GHz = 0;
	int regWrites = 0;

	if (AR_SREV_9280_10_OR_LATER(ah))
	return true;

	eepMinorRev = ah->eep_ops->get_eeprom(ah, EEP_MINOR_REV);

	RF_BANK_SETUP(ah->analogBank0Data, &ah->iniBank0, 1);

	RF_BANK_SETUP(ah->analogBank1Data, &ah->iniBank1, 1);

	RF_BANK_SETUP(ah->analogBank2Data, &ah->iniBank2, 1);

	RF_BANK_SETUP(ah->analogBank3Data, &ah->iniBank3,
	modesIndex);
	{
	int i;
	for (i = 0; i < ah->iniBank6TPC.ia_rows; i++) {
	ah->analogBank6Data[i] =
	INI_RA(&ah->iniBank6TPC, i, modesIndex);
	}
	}

	if (eepMinorRev >= 2) {
	if (IS_CHAN_2GHZ(chan)) {
	ob2GHz = ah->eep_ops->get_eeprom(ah, EEP_OB_2);
	db2GHz = ah->eep_ops->get_eeprom(ah, EEP_DB_2);
	ath9k_phy_modify_rx_buffer(ah->analogBank6Data,
	ob2GHz, 3, 197, 0);
	ath9k_phy_modify_rx_buffer(ah->analogBank6Data,
	db2GHz, 3, 194, 0);
	} else {
	ob5GHz = ah->eep_ops->get_eeprom(ah, EEP_OB_5);
	db5GHz = ah->eep_ops->get_eeprom(ah, EEP_DB_5);
	ath9k_phy_modify_rx_buffer(ah->analogBank6Data,
	ob5GHz, 3, 203, 0);
	ath9k_phy_modify_rx_buffer(ah->analogBank6Data,
	db5GHz, 3, 200, 0);
	}
	}

	RF_BANK_SETUP(ah->analogBank7Data, &ah->iniBank7, 1);

	REG_WRITE_RF_ARRAY(&ah->iniBank0, ah->analogBank0Data,
	regWrites);
	REG_WRITE_RF_ARRAY(&ah->iniBank1, ah->analogBank1Data,
	regWrites);
	REG_WRITE_RF_ARRAY(&ah->iniBank2, ah->analogBank2Data,
	regWrites);
	REG_WRITE_RF_ARRAY(&ah->iniBank3, ah->analogBank3Data,
	regWrites);
	REG_WRITE_RF_ARRAY(&ah->iniBank6TPC, ah->analogBank6Data,
	regWrites);
	REG_WRITE_RF_ARRAY(&ah->iniBank7, ah->analogBank7Data,
	regWrites);

	return true;
	}

	void
	ath9k_hw_rfdetach(struct ath_hw *ah)
	{
	if (ah->analogBank0Data != NULL) {
	kfree(ah->analogBank0Data);
	ah->analogBank0Data = NULL;
	}
	if (ah->analogBank1Data != NULL) {
	kfree(ah->analogBank1Data);
	ah->analogBank1Data = NULL;
	}
	if (ah->analogBank2Data != NULL) {
	kfree(ah->analogBank2Data);
	ah->analogBank2Data = NULL;
	}
	if (ah->analogBank3Data != NULL) {
	kfree(ah->analogBank3Data);
	ah->analogBank3Data = NULL;
	}
	if (ah->analogBank6Data != NULL) {
	kfree(ah->analogBank6Data);
	ah->analogBank6Data = NULL;
	}
	if (ah->analogBank6TPCData != NULL) {
	kfree(ah->analogBank6TPCData);
	ah->analogBank6TPCData = NULL;
	}
	if (ah->analogBank7Data != NULL) {
	kfree(ah->analogBank7Data);
	ah->analogBank7Data = NULL;
	}
	if (ah->addac5416_21 != NULL) {
	kfree(ah->addac5416_21);
	ah->addac5416_21 = NULL;
	}
	if (ah->bank6Temp != NULL) {
	kfree(ah->bank6Temp);
	ah->bank6Temp = NULL;
	}
	}

	bool ath9k_hw_init_rf(struct ath_hw ah, int status)
	{
	if (!AR_SREV_9280_10_OR_LATER(ah)) {
	ah->analogBank0Data =
	kzalloc((sizeof(u32) *
	ah->iniBank0.ia_rows), GFP_KERNEL);
	ah->analogBank1Data =
	kzalloc((sizeof(u32) *
	ah->iniBank1.ia_rows), GFP_KERNEL);
	ah->analogBank2Data =
	kzalloc((sizeof(u32) *
	ah->iniBank2.ia_rows), GFP_KERNEL);
	ah->analogBank3Data =
	kzalloc((sizeof(u32) *
	ah->iniBank3.ia_rows), GFP_KERNEL);
	ah->analogBank6Data =
	kzalloc((sizeof(u32) *
	ah->iniBank6.ia_rows), GFP_KERNEL);
	ah->analogBank6TPCData =
	kzalloc((sizeof(u32) *
	ah->iniBank6TPC.ia_rows), GFP_KERNEL);
	ah->analogBank7Data =
	kzalloc((sizeof(u32) *
	ah->iniBank7.ia_rows), GFP_KERNEL);

	if (ah->analogBank0Data == NULL
	\|\| ah->analogBank1Data == NULL
	\|\| ah->analogBank2Data == NULL
	\|\| ah->analogBank3Data == NULL
	\|\| ah->analogBank6Data == NULL
	\|\| ah->analogBank6TPCData == NULL
	\|\| ah->analogBank7Data == NULL) {
	DPRINTF(ah->ah_sc, ATH_DBG_FATAL,
	"Cannot allocate RF banks\n");
	*status = -ENOMEM;
	return false;
	}

	ah->addac5416_21 =
	kzalloc((sizeof(u32) *
	ah->iniAddac.ia_rows *
	ah->iniAddac.ia_columns), GFP_KERNEL);
	if (ah->addac5416_21 == NULL) {
	DPRINTF(ah->ah_sc, ATH_DBG_FATAL,
	"Cannot allocate addac5416_21\n");
	*status = -ENOMEM;
	return false;
	}

	ah->bank6Temp =
	kzalloc((sizeof(u32) *
	ah->iniBank6.ia_rows), GFP_KERNEL);
	if (ah->bank6Temp == NULL) {
	DPRINTF(ah->ah_sc, ATH_DBG_FATAL,
	"Cannot allocate bank6Temp\n");
	*status = -ENOMEM;
	return false;
	}
	}

	return true;
	}

	void
	ath9k_hw_decrease_chain_power(struct ath_hw ah, struct ath9k_channel chan)
	{
	int i, regWrites = 0;
	u32 bank6SelMask;
	u32 *bank6Temp = ah->bank6Temp;

	switch (ah->diversity_control) {
	case ATH9K_ANT_FIXED_A:
	bank6SelMask =
	(ah->
	antenna_switch_swap & ANTSWAP_AB) ? REDUCE_CHAIN_0 :
	REDUCE_CHAIN_1;
	break;
	case ATH9K_ANT_FIXED_B:
	bank6SelMask =
	(ah->
	antenna_switch_swap & ANTSWAP_AB) ? REDUCE_CHAIN_1 :
	REDUCE_CHAIN_0;
	break;
	case ATH9K_ANT_VARIABLE:
	return;
	break;
	default:
	return;
	break;
	}

	for (i = 0; i < ah->iniBank6.ia_rows; i++)
	bank6Temp[i] = ah->analogBank6Data[i];

	REG_WRITE(ah, AR_PHY_BASE + 0xD8, bank6SelMask);

	ath9k_phy_modify_rx_buffer(bank6Temp, 1, 1, 189, 0);
	ath9k_phy_modify_rx_buffer(bank6Temp, 1, 1, 190, 0);
	ath9k_phy_modify_rx_buffer(bank6Temp, 1, 1, 191, 0);
	ath9k_phy_modify_rx_buffer(bank6Temp, 1, 1, 192, 0);
	ath9k_phy_modify_rx_buffer(bank6Temp, 1, 1, 193, 0);
	ath9k_phy_modify_rx_buffer(bank6Temp, 1, 1, 222, 0);
	ath9k_phy_modify_rx_buffer(bank6Temp, 1, 1, 245, 0);
	ath9k_phy_modify_rx_buffer(bank6Temp, 1, 1, 246, 0);
	ath9k_phy_modify_rx_buffer(bank6Temp, 1, 1, 247, 0);

	REG_WRITE_RF_ARRAY(&ah->iniBank6, bank6Temp, regWrites);

	REG_WRITE(ah, AR_PHY_BASE + 0xD8, 0x00000053);
	#ifdef ALTER_SWITCH
	REG_WRITE(ah, PHY_SWITCH_CHAIN_0,
	(REG_READ(ah, PHY_SWITCH_CHAIN_0) & ~0x38)
	\| ((REG_READ(ah, PHY_SWITCH_CHAIN_0) >> 3) & 0x38));
	#endif
	}