ar5112.c

Atheros wifi driver source code

/*
 * Copyright (c) 2002-2005 Sam Leffler, Errno Consulting
 * Copyright (c) 2002-2005 Atheros Communications, Inc.
 * All rights reserved.
 *
 * $Id: ar5112.c,v 1.1.1.1 2006/09/12 03:45:29 steven Exp $
 */
#include "opt_ah.h"

#ifdef AH_SUPPORT_5112

#include "ah.h"
#include "ah_internal.h"

#include "ar5212/ar5212.h"
#include "ar5212/ar5212reg.h"
#include "ar5212/ar5212phy.h"

/* Add static register initialization vectors */
#define AH_5212_5112
#include "ar5212/ar5212.ini"

#define	N(a)	(sizeof(a)/sizeof(a[0]))

/*
 * WAR for bug 6773.  OS_DELAY() does a PIO READ on the PCI bus which allows
 * other cards' DMA reads to complete in the middle of our reset.
 */
#define WAR_6773(x) do {		\
	if ((++(x) % 64) == 0)		\
		OS_DELAY(1);		\
} while (0)

#define REG_WRITE_ARRAY(regArray, column, regWr) do {                  	\
	int r;								\
	for (r = 0; r < N(regArray); r++) {				\
		OS_REG_WRITE(ah, (regArray)[r][0], (regArray)[r][(column)]);\
		WAR_6773(regWr);					\
	}								\
} while (0)

#define REG_WRITE_RF_ARRAY(regArray, regData, regWr) do {               \
	int r;								\
	for (r = 0; r < N(regArray); r++) {				\
		OS_REG_WRITE(ah, (regArray)[r][0], (regData)[r]);	\
		WAR_6773(regWr);					\
	}								\
} while (0)

static	void ar5212GetLowerUpperIndex(u_int16_t v,
		u_int16_t *lp, u_int16_t listSize,
		u_int32_t *vlo, u_int32_t *vhi);
static HAL_BOOL getFullPwrTable(u_int16_t numPcdacs, u_int16_t *pcdacs,
		int16_t *power, int16_t maxPower, int16_t *retVals);
static int16_t getPminAndPcdacTableFromPowerTable(int16_t *pwrTableT4,
		u_int16_t retVals[]);
static int16_t getPminAndPcdacTableFromTwoPowerTables(int16_t *pwrTableLXpdT4,
		int16_t *pwrTableHXpdT4, u_int16_t retVals[], int16_t *pMid);
static int16_t interpolate_signed(u_int16_t target,
		u_int16_t srcLeft, u_int16_t srcRight,
		int16_t targetLeft, int16_t targetRight);

extern	void ar5212ModifyRfBuffer(u_int32_t *rfBuf, u_int32_t reg32,
		u_int32_t numBits, u_int32_t firstBit, u_int32_t column);

typedef struct {
	u_int32_t Bank1Data[N(ar5212Bank1_5112)];
	u_int32_t Bank2Data[N(ar5212Bank2_5112)];
	u_int32_t Bank3Data[N(ar5212Bank3_5112)];
	u_int32_t Bank6Data[N(ar5212Bank6_5112)];
	u_int32_t Bank7Data[N(ar5212Bank7_5112)];
} AR5212_RF_BANKS_5112;

static void
ar5112WriteRegs(struct ath_hal *ah, u_int modesIndex, u_int freqIndex, int regWrites)
{
	REG_WRITE_ARRAY(ar5212Modes_5112, modesIndex, regWrites);
	REG_WRITE_ARRAY(ar5212Common_5112, 1, regWrites);
	REG_WRITE_ARRAY(ar5212BB_RfGain_5112, freqIndex, regWrites);
}

/*
 * Take the MHz channel value and set the Channel value
 *
 * ASSUMES: Writes enabled to analog bus
 */
static HAL_BOOL
ar5112SetChannel(struct ath_hal *ah,  HAL_CHANNEL_INTERNAL *chan)
{
	u_int32_t channelSel  = 0;
	u_int32_t bModeSynth  = 0;
	u_int32_t aModeRefSel = 0;
	u_int32_t reg32       = 0;
	u_int16_t freq;

	OS_MARK(ah, AH_MARK_SETCHANNEL, chan->channel);

	if (chan->channel < 4800) {
		u_int32_t txctl;

		if (((chan->channel - 2192) % 5) == 0) {
			channelSel = ((chan->channel - 672) * 2 - 3040)/10;
			bModeSynth = 0;
		} else if (((chan->channel - 2224) % 5) == 0) {
			channelSel = ((chan->channel - 704) * 2 - 3040) / 10;
			bModeSynth = 1;
		} else {
			HALDEBUG(ah, "%s: invalid channel %u MHz\n",
				__func__, chan->channel);
			return AH_FALSE;
		}

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

		txctl = OS_REG_READ(ah, AR_PHY_CCK_TX_CTRL);
		if (chan->channel == 2484) {
			/* Enable channel spreading for channel 14 */
			OS_REG_WRITE(ah, AR_PHY_CCK_TX_CTRL,
				txctl | AR_PHY_CCK_TX_CTRL_JAPAN);
		} else {
			OS_REG_WRITE(ah, AR_PHY_CCK_TX_CTRL,
				txctl &~ AR_PHY_CCK_TX_CTRL_JAPAN);
		}
	} else if (((chan->channel % 5) == 2) && (chan->channel <= 5435)) {
		freq = chan->channel - 2; /* Align to even 5MHz raster */
		channelSel = ath_hal_reverseBits(
			(u_int32_t)(((freq - 4800)*10)/25 + 1), 8);
            	aModeRefSel = ath_hal_reverseBits(0, 2);
	} else if ((chan->channel % 20) == 0 && chan->channel >= 5120) {
		channelSel = ath_hal_reverseBits(
			((chan->channel - 4800) / 20 << 2), 8);
		aModeRefSel = ath_hal_reverseBits(3, 2);
	} else if ((chan->channel % 10) == 0) {
		channelSel = ath_hal_reverseBits(
			((chan->channel - 4800) / 10 << 1), 8);
		aModeRefSel = ath_hal_reverseBits(2, 2);
	} else if ((chan->channel % 5) == 0) {
		channelSel = ath_hal_reverseBits(
			(chan->channel - 4800) / 5, 8);
		aModeRefSel = ath_hal_reverseBits(1, 2);
	} else {
		HALDEBUG(ah, "%s: invalid channel %u MHz\n",
			__func__, chan->channel);
		return AH_FALSE;
	}

	reg32 = (channelSel << 4) | (aModeRefSel << 2) | (bModeSynth << 1) |
			(1 << 12) | 0x1;
	OS_REG_WRITE(ah, AR_PHY(0x27), reg32 & 0xff);

	reg32 >>= 8;
	OS_REG_WRITE(ah, AR_PHY(0x36), reg32 & 0x7f);

	AH_PRIVATE(ah)->ah_curchan = chan;

	return AH_TRUE;
}

/*
 * Return a reference to the requested RF Bank.
 */
static u_int32_t *
ar5112GetRfBank(struct ath_hal *ah, int bank)
{
	struct ath_hal_5212 *ahp = AH5212(ah);
	AR5212_RF_BANKS_5112 *pRfBank5112 = ahp->ah_analogBanks;

	HALASSERT(ahp->ah_analogBanks != AH_NULL);
	switch (bank) {
	case 1: return pRfBank5112->Bank1Data;
	case 2: return pRfBank5112->Bank2Data;
	case 3: return pRfBank5112->Bank3Data;
	case 6: return pRfBank5112->Bank6Data;
	case 7: return pRfBank5112->Bank7Data;
	}
	HALDEBUG(ah, "%s: unknown RF Bank %d requested\n", __func__, bank);
	return AH_NULL;
}

/*
 * Reads EEPROM header info from device structure and programs
 * all rf registers
 *
 * REQUIRES: Access to the analog rf device
 */
static HAL_BOOL
ar5112SetRfRegs(struct ath_hal *ah, HAL_CHANNEL_INTERNAL *chan,
	u_int16_t modesIndex, u_int16_t *rfXpdGain)
{
#define	RF_BANK_SETUP(_pb, _ix, _col) do {				    \
	int i;								    \
	for (i = 0; i < N(ar5212Bank##_ix##_5112); i++)			    \
		(_pb)->Bank##_ix##Data[i] = ar5212Bank##_ix##_5112[i][_col];\
} while (0)
	struct ath_hal_5212 *ahp = AH5212(ah);
	u_int16_t rfXpdSel, gainI;
	u_int16_t ob5GHz = 0, db5GHz = 0;
	u_int16_t ob2GHz = 0, db2GHz = 0;
	AR5212_RF_BANKS_5112 *pRfBanks = ahp->ah_analogBanks;
	GAIN_VALUES *gv = &ahp->ah_gainValues;
	int regWrites = 0;

	HALASSERT(pRfBanks);

	/* Setup rf parameters */
	switch (chan->channelFlags & CHANNEL_ALL) {
	case CHANNEL_A:
	case CHANNEL_T:
	case CHANNEL_XR:
		if (chan->channel > 4000 && chan->channel < 5260) {
			ob5GHz = ahp->ah_ob1;
			db5GHz = ahp->ah_db1;
		} else if (chan->channel >= 5260 && chan->channel < 5500) {
			ob5GHz = ahp->ah_ob2;
			db5GHz = ahp->ah_db2;
		} else if (chan->channel >= 5500 && chan->channel < 5725) {
			ob5GHz = ahp->ah_ob3;
			db5GHz = ahp->ah_db3;
		} else if (chan->channel >= 5725) {
			ob5GHz = ahp->ah_ob4;
			db5GHz = ahp->ah_db4;
		} else {
			/* XXX else */
		}
		rfXpdSel = ahp->ah_xpd[headerInfo11A];
		gainI = ahp->ah_gainI[headerInfo11A];
		break;
	case CHANNEL_B:
		ob2GHz = ahp->ah_ob2GHz[0];
		db2GHz = ahp->ah_db2GHz[0];
		rfXpdSel = ahp->ah_xpd[headerInfo11B];
		gainI = ahp->ah_gainI[headerInfo11B];
		break;
	case CHANNEL_G:
	case CHANNEL_108G:
#ifdef notyet
	case CHANNEL_XR_G:
#endif
		ob2GHz = ahp->ah_ob2GHz[1];
		db2GHz = ahp->ah_ob2GHz[1];
		rfXpdSel = ahp->ah_xpd[headerInfo11G];
		gainI = ahp->ah_gainI[headerInfo11G];
		break;
	default:
		HALDEBUG(ah, "%s: invalid channel flags 0x%x\n",
			__func__, chan->channelFlags);
		return AH_FALSE;
	}

	/* Setup Bank 1 Write */
	RF_BANK_SETUP(pRfBanks, 1, 1);

	/* Setup Bank 2 Write */
	RF_BANK_SETUP(pRfBanks, 2, modesIndex);

	/* Setup Bank 3 Write */
	RF_BANK_SETUP(pRfBanks, 3, modesIndex);

	/* Setup Bank 6 Write */
	RF_BANK_SETUP(pRfBanks, 6, modesIndex);

	ar5212ModifyRfBuffer(pRfBanks->Bank6Data, rfXpdSel,     1, 302, 0);

	ar5212ModifyRfBuffer(pRfBanks->Bank6Data, rfXpdGain[0], 2, 270, 0);
	ar5212ModifyRfBuffer(pRfBanks->Bank6Data, rfXpdGain[1], 2, 257, 0);

	if (IS_CHAN_OFDM(chan)) {
		ar5212ModifyRfBuffer(pRfBanks->Bank6Data,
			gv->currStep->paramVal[GP_PWD_138], 1, 168, 3);
		ar5212ModifyRfBuffer(pRfBanks->Bank6Data,
			gv->currStep->paramVal[GP_PWD_137], 1, 169, 3);
		ar5212ModifyRfBuffer(pRfBanks->Bank6Data,
			gv->currStep->paramVal[GP_PWD_136], 1, 170, 3);
		ar5212ModifyRfBuffer(pRfBanks->Bank6Data,
			gv->currStep->paramVal[GP_PWD_132], 1, 174, 3);
		ar5212ModifyRfBuffer(pRfBanks->Bank6Data,
			gv->currStep->paramVal[GP_PWD_131], 1, 175, 3);
		ar5212ModifyRfBuffer(pRfBanks->Bank6Data,
			gv->currStep->paramVal[GP_PWD_130], 1, 176, 3);
	}

	/* Only the 5 or 2 GHz OB/DB need to be set for a mode */
	if (IS_CHAN_2GHZ(chan)) {
		ar5212ModifyRfBuffer(pRfBanks->Bank6Data, ob2GHz, 3, 287, 0);
		ar5212ModifyRfBuffer(pRfBanks->Bank6Data, db2GHz, 3, 290, 0);
	} else {
		ar5212ModifyRfBuffer(pRfBanks->Bank6Data, ob5GHz, 3, 279, 0);
		ar5212ModifyRfBuffer(pRfBanks->Bank6Data, db5GHz, 3, 282, 0);
	}
	
	/* Lower synth voltage for X112 Rev 2.0 only */
	if (IS_RADX112_REV2(ah)) {
		/* Non-Reversed analyg registers - so values are pre-reversed */
		ar5212ModifyRfBuffer(pRfBanks->Bank6Data, 2, 2, 90, 2);
		ar5212ModifyRfBuffer(pRfBanks->Bank6Data, 2, 2, 92, 2);
		ar5212ModifyRfBuffer(pRfBanks->Bank6Data, 2, 2, 94, 2);
		ar5212ModifyRfBuffer(pRfBanks->Bank6Data, 2, 1, 254, 2);
	}

    /* Decrease Power Consumption for 5312/5213 and up */
    if (AH_PRIVATE(ah)->ah_phyRev >= AR_PHY_CHIP_ID_REV_2) {
        ar5212ModifyRfBuffer(pRfBanks->Bank6Data, 1, 1, 281, 1);
        ar5212ModifyRfBuffer(pRfBanks->Bank6Data, 1, 2, 1, 3);
        ar5212ModifyRfBuffer(pRfBanks->Bank6Data, 1, 2, 3, 3);
        ar5212ModifyRfBuffer(pRfBanks->Bank6Data, 1, 1, 139, 3);
        ar5212ModifyRfBuffer(pRfBanks->Bank6Data, 1, 1, 140, 3);
    }

	/* Setup Bank 7 Setup */
	RF_BANK_SETUP(pRfBanks, 7, modesIndex);
	if (IS_CHAN_OFDM(chan))
		ar5212ModifyRfBuffer(pRfBanks->Bank7Data,
			gv->currStep->paramVal[GP_MIXGAIN_OVR], 2, 37, 0);

	ar5212ModifyRfBuffer(pRfBanks->Bank7Data, gainI, 6, 14, 0);

	/* Adjust params for Derby TX power control */
	if (IS_CHAN_HALF_RATE(chan) || IS_CHAN_QUARTER_RATE(chan)) {
        	u_int32_t	rfDelay, rfPeriod;

        	rfDelay = 0xf;
        	rfPeriod = (IS_CHAN_HALF_RATE(chan)) ?  0x8 : 0xf;
        	ar5212ModifyRfBuffer(pRfBanks->Bank7Data, rfDelay, 4, 58, 0);
        	ar5212ModifyRfBuffer(pRfBanks->Bank7Data, rfPeriod, 4, 70, 0);
	}

#ifdef notyet
	/* Analog registers are setup - EAR can modify */
	if (ar5212IsEarEngaged(pDev, chan))
		u_int32_t modifier;
		ar5212EarModify(pDev, EAR_LC_RF_WRITE, chan, &modifier);
#endif
	/* Write Analog registers */
	REG_WRITE_RF_ARRAY(ar5212Bank1_5112, pRfBanks->Bank1Data, regWrites);
	REG_WRITE_RF_ARRAY(ar5212Bank2_5112, pRfBanks->Bank2Data, regWrites);
	REG_WRITE_RF_ARRAY(ar5212Bank3_5112, pRfBanks->Bank3Data, regWrites);
	REG_WRITE_RF_ARRAY(ar5212Bank6_5112, pRfBanks->Bank6Data, regWrites);
	REG_WRITE_RF_ARRAY(ar5212Bank7_5112, pRfBanks->Bank7Data, regWrites);

	/* Now that we have reprogrammed rfgain value, clear the flag. */
	ahp->ah_rfgainState = HAL_RFGAIN_INACTIVE;
	return AH_TRUE;
#undef	RF_BANK_SETUP
}

/*
 * Read the transmit power levels from the structures taken from EEPROM
 * Interpolate read transmit power values for this channel
 * Organize the transmit power values into a table for writing into the hardware
 */
static HAL_BOOL
ar5112SetPowerTable(struct ath_hal *ah,
	int16_t *pPowerMin, int16_t *pPowerMax, HAL_CHANNEL_INTERNAL *chan,
	u_int16_t *rfXpdGain)
{
	struct ath_hal_5212 *ahp = AH5212(ah);
	u_int32_t numXpdGain = IS_RADX112_REV2(ah) ? 2 : 1;
	u_int32_t    xpdGainMask = 0;
	int16_t     powerMid, *pPowerMid = &powerMid;

	EXPN_DATA_PER_CHANNEL_5112 *pRawCh;
	EEPROM_POWER_EXPN_5112     *pPowerExpn = AH_NULL;

	u_int32_t    ii, jj, kk;
	int16_t     minPwr_t4, maxPwr_t4, Pmin, Pmid;

	u_int32_t    chan_idx_L, chan_idx_R;
	u_int16_t    chan_L, chan_R;

	int16_t     pwr_table0[64];
	int16_t     pwr_table1[64];
	u_int16_t    pcdacs[10];
	int16_t     powers[10];
	u_int16_t    numPcd;
	int16_t     powTableLXPD[2][64];
	int16_t     powTableHXPD[2][64];
	int16_t     tmpPowerTable[64];
	u_int16_t    xgainList[2];
	u_int16_t    xpdMask;

	switch (chan->channelFlags & CHANNEL_ALL) {
	case CHANNEL_A:
	case CHANNEL_T:
	case CHANNEL_XR:
		pPowerExpn = &ahp->ah_modePowerArray5112[headerInfo11A];
		xpdGainMask = ahp->ah_xgain[headerInfo11A];
		break;
	case CHANNEL_B:
		pPowerExpn = &ahp->ah_modePowerArray5112[headerInfo11B];
		xpdGainMask = ahp->ah_xgain[headerInfo11B];
		break;
	case CHANNEL_G:
	case CHANNEL_108G:
#ifdef notyet
	case CHANNEL_XR_G:
#endif
		pPowerExpn = &ahp->ah_modePowerArray5112[headerInfo11G];
		xpdGainMask = ahp->ah_xgain[headerInfo11G];
		break;
	default:
		HALDEBUG(ah, "%s: unknown channel flags 0x%x\n",
			__func__, chan->channelFlags & CHANNEL_ALL);
		return AH_FALSE;
	}

	if ((xpdGainMask & pPowerExpn->xpdMask) < 1) {
		HALDEBUG(ah, "%s: desired xpdGainMask 0x%x not supported by "
			"calibrated xpdMask 0x%x\n", __func__,
			xpdGainMask, pPowerExpn->xpdMask);
		return AH_FALSE;
	}

	maxPwr_t4 = (int16_t)(2*(*pPowerMax));	/* pwr_t2 -> pwr_t4 */
	minPwr_t4 = (int16_t)(2*(*pPowerMin));	/* pwr_t2 -> pwr_t4 */

	xgainList[0] = 0xDEAD;
	xgainList[1] = 0xDEAD;

	kk = 0;
	xpdMask = pPowerExpn->xpdMask;
	for (jj = 0; jj < NUM_XPD_PER_CHANNEL; jj++) {
		if (((xpdMask >> jj) & 1) > 0) {
			if (kk > 1) {
				HALDEBUG(ah, "A maximum of 2 xpdGains supported"
					"in pExpnPower data\n");
				return AH_FALSE;
			}
			xgainList[kk++] = (u_int16_t)jj;
		}
	}

	ar5212GetLowerUpperIndex(chan->channel, &pPowerExpn->pChannels[0],
		pPowerExpn->numChannels, &chan_idx_L, &chan_idx_R);

	kk = 0;
	for (ii = chan_idx_L; ii <= chan_idx_R; ii++) {
		pRawCh = &(pPowerExpn->pDataPerChannel[ii]);
		if (xgainList[1] == 0xDEAD) {
			jj = xgainList[0];
			numPcd = pRawCh->pDataPerXPD[jj].numPcdacs;
			OS_MEMCPY(&pcdacs[0], &pRawCh->pDataPerXPD[jj].pcdac[0],
				numPcd * sizeof(u_int16_t));
			OS_MEMCPY(&powers[0], &pRawCh->pDataPerXPD[jj].pwr_t4[0],
				numPcd * sizeof(int16_t));
			if (!getFullPwrTable(numPcd, &pcdacs[0], &powers[0],
				pRawCh->maxPower_t4, &tmpPowerTable[0])) {
				return AH_FALSE;
			}
			OS_MEMCPY(&powTableLXPD[kk][0], &tmpPowerTable[0],
				64*sizeof(int16_t));
		} else {
			jj = xgainList[0];
			numPcd = pRawCh->pDataPerXPD[jj].numPcdacs;
			OS_MEMCPY(&pcdacs[0], &pRawCh->pDataPerXPD[jj].pcdac[0],
				numPcd*sizeof(u_int16_t));
			OS_MEMCPY(&powers[0],
				&pRawCh->pDataPerXPD[jj].pwr_t4[0],
				numPcd*sizeof(int16_t));
			if (!getFullPwrTable(numPcd, &pcdacs[0], &powers[0],
				pRawCh->maxPower_t4, &tmpPowerTable[0])) {