ar2413.c

Atheros wifi driver source code

	u_int16_t VpdTable_R[MAX_NUM_PDGAINS_PER_CHANNEL][MAX_PWR_RANGE_IN_HALF_DB];
	/* filled out Vpd table for all pdGains (chanR) */
	u_int16_t VpdTable_I[MAX_NUM_PDGAINS_PER_CHANNEL][MAX_PWR_RANGE_IN_HALF_DB];
	/* filled out Vpd table for all pdGains (interpolated) */
	/* 
	 * If desired to support -ve power levels in future, just
	 * change pwr_I_0 to signed 5-bits.
	 */
	int16_t Pmin_t2[MAX_NUM_PDGAINS_PER_CHANNEL];
	/* to accomodate -ve power levels later on. */
	int16_t Pmax_t2[MAX_NUM_PDGAINS_PER_CHANNEL];
	/* to accomodate -ve power levels later on */
	u_int16_t numVpd = 0;
	u_int16_t Vpd_step;
	int16_t tmpVal ; 
	u_int32_t sizeCurrVpdTable, maxIndex, tgtIndex;

	HALDEBUG(ah, "==>%s:\n", __func__);
    
	/* Get upper lower index */
	GetLowerUpperIndex(channel, pRawDataset->pChannels,
				 pRawDataset->numChannels, &(idxL), &(idxR));

	for (ii = 0; ii < MAX_NUM_PDGAINS_PER_CHANNEL; ii++) {
		jj = MAX_NUM_PDGAINS_PER_CHANNEL - ii - 1;
		/* work backwards 'cause highest pdGain for lowest power */
		numVpd = pRawDataset->pDataPerChannel[idxL].pDataPerPDGain[jj].numVpd;
		if (numVpd > 0) {
			pPdGainValues[numPdGainsUsed] = pRawDataset->pDataPerChannel[idxL].pDataPerPDGain[jj].pd_gain;
			Pmin_t2[numPdGainsUsed] = pRawDataset->pDataPerChannel[idxL].pDataPerPDGain[jj].pwr_t4[0];
			if (Pmin_t2[numPdGainsUsed] >pRawDataset->pDataPerChannel[idxR].pDataPerPDGain[jj].pwr_t4[0]) {
				Pmin_t2[numPdGainsUsed] = pRawDataset->pDataPerChannel[idxR].pDataPerPDGain[jj].pwr_t4[0];
			}
			Pmin_t2[numPdGainsUsed] = (int16_t)
				(Pmin_t2[numPdGainsUsed] / 2);
			Pmax_t2[numPdGainsUsed] = pRawDataset->pDataPerChannel[idxL].pDataPerPDGain[jj].pwr_t4[numVpd-1];
			if (Pmax_t2[numPdGainsUsed] > pRawDataset->pDataPerChannel[idxR].pDataPerPDGain[jj].pwr_t4[numVpd-1])
				Pmax_t2[numPdGainsUsed] = 
					pRawDataset->pDataPerChannel[idxR].pDataPerPDGain[jj].pwr_t4[numVpd-1];
			Pmax_t2[numPdGainsUsed] = (int16_t)(Pmax_t2[numPdGainsUsed] / 2);
			ar2413FillVpdTable(
					   numPdGainsUsed, Pmin_t2[numPdGainsUsed], Pmax_t2[numPdGainsUsed], 
					   &(pRawDataset->pDataPerChannel[idxL].pDataPerPDGain[jj].pwr_t4[0]), 
					   &(pRawDataset->pDataPerChannel[idxL].pDataPerPDGain[jj].Vpd[0]), numVpd, VpdTable_L
					   );
			ar2413FillVpdTable(
					   numPdGainsUsed, Pmin_t2[numPdGainsUsed], Pmax_t2[numPdGainsUsed], 
					   &(pRawDataset->pDataPerChannel[idxR].pDataPerPDGain[jj].pwr_t4[0]),
					   &(pRawDataset->pDataPerChannel[idxR].pDataPerPDGain[jj].Vpd[0]), numVpd, VpdTable_R
					   );
			for (kk = 0; kk < (u_int16_t)(Pmax_t2[numPdGainsUsed] - Pmin_t2[numPdGainsUsed]); kk++) {
				VpdTable_I[numPdGainsUsed][kk] = 
					interpolate_signed(
							   channel, pRawDataset->pChannels[idxL], pRawDataset->pChannels[idxR],
							   (int16_t)VpdTable_L[numPdGainsUsed][kk], (int16_t)VpdTable_R[numPdGainsUsed][kk]);
			}
			/* fill VpdTable_I for this pdGain */
			numPdGainsUsed++;
		}
		/* if this pdGain is used */
	}

	*pMinCalPower = Pmin_t2[0];
	kk = 0; /* index for the final table */
	for (ii = 0; ii < numPdGainsUsed; ii++) {
		if (ii == (numPdGainsUsed - 1))
			pPdGainBoundaries[ii] = Pmax_t2[ii] +
				PD_GAIN_BOUNDARY_STRETCH_IN_HALF_DB;
		else 
			pPdGainBoundaries[ii] = (u_int16_t)
				((Pmax_t2[ii] + Pmin_t2[ii+1]) / 2 );

		/* Find starting index for this pdGain */
		if (ii == 0) 
			ss = 0; /* for the first pdGain, start from index 0 */
		else 
			ss = (pPdGainBoundaries[ii-1] - Pmin_t2[ii]) - 
				pdGainOverlap_t2;
		Vpd_step = (u_int16_t)(VpdTable_I[ii][1] - VpdTable_I[ii][0]);
		Vpd_step = (u_int16_t)((Vpd_step < 1) ? 1 : Vpd_step);
		/*
		 *-ve ss indicates need to extrapolate data below for this pdGain
		 */
		while (ss < 0) {
			tmpVal = (int16_t)(VpdTable_I[ii][0] + ss*Vpd_step);
			pPDADCValues[kk++] = (u_int16_t)((tmpVal < 0) ? 0 : tmpVal);
			ss++;
		}

		sizeCurrVpdTable = Pmax_t2[ii] - Pmin_t2[ii];
		tgtIndex = pPdGainBoundaries[ii] + pdGainOverlap_t2 - Pmin_t2[ii];
		maxIndex = (tgtIndex < sizeCurrVpdTable) ? tgtIndex : sizeCurrVpdTable;

		while (ss < (int16_t)maxIndex)
			pPDADCValues[kk++] = VpdTable_I[ii][ss++];

		Vpd_step = (u_int16_t)(VpdTable_I[ii][sizeCurrVpdTable-1] -
				       VpdTable_I[ii][sizeCurrVpdTable-2]);
		Vpd_step = (u_int16_t)((Vpd_step < 1) ? 1 : Vpd_step);           
		/*
		 * for last gain, pdGainBoundary == Pmax_t2, so will 
		 * have to extrapolate
		 */
		if (tgtIndex > maxIndex) {	/* need to extrapolate above */
			while(ss < (int16_t)tgtIndex) {
				tmpVal = (u_int16_t)
					(VpdTable_I[ii][sizeCurrVpdTable-1] + 
					 (ss-maxIndex)*Vpd_step);
				pPDADCValues[kk++] = (tmpVal > 127) ? 
					127 : tmpVal;
				ss++;
			}
		}				/* extrapolated above */
	}					/* for all pdGainUsed */

	while (ii < MAX_NUM_PDGAINS_PER_CHANNEL) {
		pPdGainBoundaries[ii] = pPdGainBoundaries[ii-1];
		ii++;
	}
	while (kk < 128) {
		pPDADCValues[kk] = pPDADCValues[kk-1];
		kk++;
	}

	HALDEBUG(ah, "<==%s\n", __func__);
}

static HAL_BOOL
ar2413SetPowerTable(struct ath_hal *ah,
	int16_t *minPower, int16_t *maxPower, HAL_CHANNEL_INTERNAL *chan, 
	u_int16_t *rfXpdGain)
{
	struct ath_hal_5212 *ahp = AH5212(ah);
	RAW_DATA_STRUCT_2413 *pRawDataset = AH_NULL;
	u_int16_t pdGainOverlap_t2;
	int16_t minCalPower2413_t2;
	u_int16_t *pdadcValues = ahp->ah_pcdacTable;
	u_int16_t gainBoundaries[4];
	u_int32_t i, reg32, regoffset;

	HALDEBUG(ah, "%s:chan 0x%x flag 0x%x\n", __func__, chan->channel,chan->channelFlags);

	if (IS_CHAN_G(chan) || IS_CHAN_108G(chan))
		pRawDataset = &ahp->ah_rawDataset2413[headerInfo11G];
	else if (IS_CHAN_B(chan))
		pRawDataset = &ahp->ah_rawDataset2413[headerInfo11B];
	else {
		HALDEBUG(ah, "%s:illegal mode\n", __func__);
		return AH_FALSE;
	}

	pdGainOverlap_t2 = (u_int16_t) SM(OS_REG_READ(ah, AR_PHY_TPCRG5),
					  AR_PHY_TPCRG5_PD_GAIN_OVERLAP);
    
	ar2413getGainBoundariesAndPdadcsForPowers(ah, chan->channel,
		pRawDataset, pdGainOverlap_t2,&minCalPower2413_t2,gainBoundaries,
		rfXpdGain, pdadcValues);

	OS_REG_RMW_FIELD(ah, AR_PHY_TPCRG1, AR_PHY_TPCRG1_NUM_PD_GAIN, 
			 (pRawDataset->pDataPerChannel[0].numPdGains - 1));

	/*
	 * Note the pdadc table may not start at 0 dBm power, could be
	 * negative or greater than 0.  Need to offset the power
	 * values by the amount of minPower for griffin
	 */
	if (minCalPower2413_t2 != 0)
		ahp->ah_txPowerIndexOffset = (int16_t)(0 - minCalPower2413_t2);
	else
		ahp->ah_txPowerIndexOffset = 0;

	/* Finally, write the power values into the baseband power table */
	regoffset = 0x9800 + (672 <<2); /* beginning of pdadc table in griffin */
	for (i = 0; i < 32; i++) {
		reg32 = ((pdadcValues[4*i + 0] & 0xFF) << 0)  | 
			((pdadcValues[4*i + 1] & 0xFF) << 8)  |
			((pdadcValues[4*i + 2] & 0xFF) << 16) |
			((pdadcValues[4*i + 3] & 0xFF) << 24) ;        
		OS_REG_WRITE(ah, regoffset, reg32);
		regoffset += 4;
	}

	OS_REG_WRITE(ah, AR_PHY_TPCRG5, 
		     SM(pdGainOverlap_t2, AR_PHY_TPCRG5_PD_GAIN_OVERLAP) | 
		     SM(gainBoundaries[0], AR_PHY_TPCRG5_PD_GAIN_BOUNDARY_1) |
		     SM(gainBoundaries[1], AR_PHY_TPCRG5_PD_GAIN_BOUNDARY_2) |
		     SM(gainBoundaries[2], AR_PHY_TPCRG5_PD_GAIN_BOUNDARY_3) |
		     SM(gainBoundaries[3], AR_PHY_TPCRG5_PD_GAIN_BOUNDARY_4));

	return AH_TRUE;
}

/*
 * Free memory for analog bank scratch buffers
 */
static void
ar2413RfDetach(struct ath_hal *ah)
{
	struct ath_hal_5212 *ahp = AH5212(ah);

	if (ahp->ah_pcdacTable != AH_NULL) {
		ath_hal_free(ahp->ah_pcdacTable);
		ahp->ah_pcdacTable = AH_NULL;
	}
	if (ahp->ah_analogBanks != AH_NULL) {
		ath_hal_free(ahp->ah_analogBanks);
		ahp->ah_analogBanks = AH_NULL;
	}
}

static int16_t
ar2413GetMinPower(struct ath_hal *ah, RAW_DATA_PER_CHANNEL_2413 *data)
{
	u_int32_t ii,jj;
	u_int16_t Pmin=0,numVpd;

	for (ii = 0; ii < MAX_NUM_PDGAINS_PER_CHANNEL; ii++) {
		jj = MAX_NUM_PDGAINS_PER_CHANNEL - ii - 1;
		/* work backwards 'cause highest pdGain for lowest power */
		numVpd = data->pDataPerPDGain[jj].numVpd;
		if (numVpd > 0) {
			Pmin = data->pDataPerPDGain[jj].pwr_t4[0];
			return(Pmin);
		}
	}
	return(Pmin);
}

static int16_t
ar2413GetMaxPower(struct ath_hal *ah, RAW_DATA_PER_CHANNEL_2413 *data)
{
	u_int32_t ii;
	u_int16_t Pmax=0,numVpd;
	
	for (ii=0; ii< MAX_NUM_PDGAINS_PER_CHANNEL; ii++) {
		/* work forwards cuase lowest pdGain for highest power */
		numVpd = data->pDataPerPDGain[ii].numVpd;
		if (numVpd > 0) {
			Pmax = data->pDataPerPDGain[ii].pwr_t4[numVpd-1];
			return(Pmax);
		}
	}
	return(Pmax);
}

static
HAL_BOOL ar2413GetChannelMaxMinPower(struct ath_hal *ah, HAL_CHANNEL *chan,
				     int16_t *maxPow, int16_t *minPow)
{
	struct ath_hal_5212 *ahp = AH5212(ah);
	RAW_DATA_STRUCT_2413 *pRawDataset = AH_NULL;
	RAW_DATA_PER_CHANNEL_2413 *data=AH_NULL;
	u_int16_t numChannels;
	int totalD,totalF, totalMin,last, i;

	*maxPow = 0;

	if (IS_CHAN_G(chan) || IS_CHAN_108G(chan))
		pRawDataset = &ahp->ah_rawDataset2413[headerInfo11G];
	else if (IS_CHAN_B(chan))
		pRawDataset = &ahp->ah_rawDataset2413[headerInfo11B];
	else
		return(AH_FALSE);

	numChannels = pRawDataset->numChannels;
	data = pRawDataset->pDataPerChannel;
	
	/* Make sure the channel is in the range of the TP values 
	 *  (freq piers)
	 */
	if (numChannels < 1)
		return(AH_FALSE);

	if ((chan->channel < data[0].channelValue) ||
	    (chan->channel > data[numChannels-1].channelValue)) {
		if (chan->channel < data[0].channelValue) {
			*maxPow = ar2413GetMaxPower(ah, &data[0]);
			*minPow = ar2413GetMinPower(ah, &data[0]);
			return(AH_TRUE);
		} else {
			*maxPow = ar2413GetMaxPower(ah, &data[numChannels - 1]);
			*minPow = ar2413GetMinPower(ah, &data[numChannels - 1]);
			return(AH_TRUE);
		}
	}

	/* Linearly interpolate the power value now */
	for (last=0,i=0; (i<numChannels) && (chan->channel > data[i].channelValue);
	     last = i++);
	totalD = data[i].channelValue - data[last].channelValue;
	if (totalD > 0) {
		totalF = ar2413GetMaxPower(ah, &data[i]) - ar2413GetMaxPower(ah, &data[last]);
		*maxPow = (int8_t) ((totalF*(chan->channel-data[last].channelValue) + 
				     ar2413GetMaxPower(ah, &data[last])*totalD)/totalD);
		totalMin = ar2413GetMinPower(ah, &data[i]) - ar2413GetMinPower(ah, &data[last]);
		*minPow = (int8_t) ((totalMin*(chan->channel-data[last].channelValue) +
				     ar2413GetMinPower(ah, &data[last])*totalD)/totalD);
		return(AH_TRUE);
	} else {
		if (chan->channel == data[i].channelValue) {
			*maxPow = ar2413GetMaxPower(ah, &data[i]);
			*minPow = ar2413GetMinPower(ah, &data[i]);
			return(AH_TRUE);
		} else
			return(AH_FALSE);
	}
}

static HAL_BOOL
ar2413GetChipPowerLimits(struct ath_hal *ah, HAL_CHANNEL *chans, u_int32_t nchans)
{
	HAL_BOOL retVal = AH_TRUE;
	int i;
	int16_t maxPow, minPow;

	for (i=0; i<nchans; i++) {
		if (ar2413GetChannelMaxMinPower(ah, &chans[i], &maxPow, &minPow)) {
			chans[i].maxTxPower = maxPow;
			chans[i].minTxPower = minPow;
		} else {
			HALDEBUG(ah, "Failed setting power table for nchans=%d\n", i);
			retVal = AH_FALSE;
		}
	}
#ifdef AH_DEBUG
	for (i=0; i<nchans; i++) {
		ath_hal_printf(ah,"Chan %d: MaxPow = %d MinPow = %d\n",
			 chans[i].channel,chans[i].maxTxPower, chans[i].minTxPower);
	}
#endif
	return (retVal);
}		

/*
 * Allocate memory for analog bank scratch buffers
 * Scratch Buffer will be reinitialized every reset so no need to zero now
 */
HAL_BOOL
ar2413RfAttach(struct ath_hal *ah, HAL_STATUS *status)
{
	struct ath_hal_5212 *ahp = AH5212(ah);

	HALASSERT(ahp->ah_analogBanks == AH_NULL);
	ahp->ah_analogBanks = ath_hal_malloc(sizeof(AR5212_RF_BANKS_2413));
	if (ahp->ah_analogBanks == AH_NULL) {
		HALDEBUG(ah, "%s: cannot allocate RF banks\n", __func__);
		*status = HAL_ENOMEM;		/* XXX */
		return AH_FALSE;
	}
	HALASSERT(ahp->ah_pcdacTable == AH_NULL);
	ahp->ah_pcdacTableSize = PWR_TABLE_SIZE_2413 * sizeof(u_int16_t);
	ahp->ah_pcdacTable = ath_hal_malloc(ahp->ah_pcdacTableSize);
	if (ahp->ah_pcdacTable == AH_NULL) {
		HALDEBUG(ah, "%s: cannot allocate PCDAC table\n", __func__);
		*status = HAL_ENOMEM;		/* XXX */
		return AH_FALSE;
	}

	ahp->ah_rfHal.rfDetach		= ar2413RfDetach;
	ahp->ah_rfHal.writeRegs		= ar2413WriteRegs;
	ahp->ah_rfHal.getRfBank		= ar2413GetRfBank;
	ahp->ah_rfHal.setChannel	= ar2413SetChannel;
	ahp->ah_rfHal.setRfRegs		= ar2413SetRfRegs;
	ahp->ah_rfHal.setPowerTable	= ar2413SetPowerTable;
	ahp->ah_rfHal.getChipPowerLim	= ar2413GetChipPowerLimits;

	return AH_TRUE;
}
#endif /* AH_SUPPORT_2413 */