ar5112.c

Atheros wifi driver source code

				return AH_FALSE;
			}
			OS_MEMCPY(&powTableLXPD[kk][0], &tmpPowerTable[0],
				64 * sizeof(int16_t));

			jj = xgainList[1];
			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(&powTableHXPD[kk][0], &tmpPowerTable[0],
				64 * sizeof(int16_t));
		}
		kk++;
	}

	chan_L = pPowerExpn->pChannels[chan_idx_L];
	chan_R = pPowerExpn->pChannels[chan_idx_R];
	kk = chan_idx_R - chan_idx_L;

	if (xgainList[1] == 0xDEAD) {
		for (jj = 0; jj < 64; jj++) {
			pwr_table0[jj] = interpolate_signed(
				chan->channel, chan_L, chan_R,
				powTableLXPD[0][jj], powTableLXPD[kk][jj]);
		}
		Pmin = getPminAndPcdacTableFromPowerTable(&pwr_table0[0],
				ahp->ah_pcdacTable);
		*pPowerMin = (int16_t) (Pmin / 2);
		*pPowerMid = (int16_t) (pwr_table0[63] / 2);
		*pPowerMax = (int16_t) (pwr_table0[63] / 2);
		rfXpdGain[0] = xgainList[0];
		rfXpdGain[1] = rfXpdGain[0];
	} else {
		for (jj = 0; jj < 64; jj++) {
			pwr_table0[jj] = interpolate_signed(
				chan->channel, chan_L, chan_R,
				powTableLXPD[0][jj], powTableLXPD[kk][jj]);
			pwr_table1[jj] = interpolate_signed(
				chan->channel, chan_L, chan_R,
				powTableHXPD[0][jj], powTableHXPD[kk][jj]);
		}
		if (numXpdGain == 2) {
			Pmin = getPminAndPcdacTableFromTwoPowerTables(
				&pwr_table0[0], &pwr_table1[0],
				ahp->ah_pcdacTable, &Pmid);
			*pPowerMin = (int16_t) (Pmin / 2);
			*pPowerMid = (int16_t) (Pmid / 2);
			*pPowerMax = (int16_t) (pwr_table0[63] / 2);
			rfXpdGain[0] = xgainList[0];
			rfXpdGain[1] = xgainList[1];
		} else if (minPwr_t4 <= pwr_table1[63] &&
			   maxPwr_t4 <= pwr_table1[63]) {
			Pmin = getPminAndPcdacTableFromPowerTable(
				&pwr_table1[0], ahp->ah_pcdacTable);
			rfXpdGain[0] = xgainList[1];
			rfXpdGain[1] = rfXpdGain[0];
			*pPowerMin = (int16_t) (Pmin / 2);
			*pPowerMid = (int16_t) (pwr_table1[63] / 2);
			*pPowerMax = (int16_t) (pwr_table1[63] / 2);
		} else {
			Pmin = getPminAndPcdacTableFromPowerTable(
				&pwr_table0[0], ahp->ah_pcdacTable);
			rfXpdGain[0] = xgainList[0];
			rfXpdGain[1] = rfXpdGain[0];
			*pPowerMin = (int16_t) (Pmin/2);
			*pPowerMid = (int16_t) (pwr_table0[63] / 2);
			*pPowerMax = (int16_t) (pwr_table0[63] / 2);
		}
	}

	/*
	 * Move 5112 rates to match power tables where the max
	 * power table entry corresponds with maxPower.
	 */
	HALASSERT(*pPowerMax <= PCDAC_STOP);
	ahp->ah_txPowerIndexOffset = PCDAC_STOP - *pPowerMax;

	return AH_TRUE;
}

/*
 * Returns interpolated or the scaled up interpolated value
 */
static int16_t
interpolate_signed(u_int16_t target, u_int16_t srcLeft, u_int16_t srcRight,
	int16_t targetLeft, int16_t targetRight)
{
	int16_t rv;

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

/*
 * Return indices surrounding the value in sorted integer lists.
 *
 * NB: the input list is assumed to be sorted in ascending order
 */
static void
ar5212GetLowerUpperIndex(u_int16_t v, u_int16_t *lp, u_int16_t listSize,
                          u_int32_t *vlo, u_int32_t *vhi)
{
	u_int32_t target = v;
	u_int16_t *ep = lp+listSize;
	u_int16_t *tp;

	/*
	 * Check first and last elements for out-of-bounds conditions.
	 */
	if (target < lp[0]) {
		*vlo = *vhi = 0;
		return;
	}
	if (target >= ep[-1]) {
		*vlo = *vhi = listSize - 1;
		return;
	}

	/* look for value being near or between 2 values in list */
	for (tp = lp; tp < ep; tp++) {
		/*
		 * If value is close to the current value of the list
		 * then target is not between values, it is one of the values
		 */
		if (*tp == target) {
			*vlo = *vhi = tp - lp;
			return;
		}
		/*
		 * Look for value being between current value and next value
		 * if so return these 2 values
		 */
		if (target < tp[1]) {
			*vlo = tp - lp;
			*vhi = *vlo + 1;
			return;
		}
	}
}

static HAL_BOOL
getFullPwrTable(u_int16_t numPcdacs, u_int16_t *pcdacs, int16_t *power, int16_t maxPower, int16_t *retVals)
{
	u_int16_t    ii;
	u_int16_t    idxL = 0;
	u_int16_t    idxR = 1;

	if (numPcdacs < 2) {
		HALDEBUG(AH_NULL, "%s: at least 2 pcdac values needed [%d]\n",
			__func__, numPcdacs);
		return AH_FALSE;
	}
	for (ii = 0; ii < 64; ii++) {
		if (ii>pcdacs[idxR] && idxR < numPcdacs-1) {
			idxL++;
			idxR++;
		}
		retVals[ii] = interpolate_signed(ii,
			pcdacs[idxL], pcdacs[idxR], power[idxL], power[idxR]);
		if (retVals[ii] >= maxPower) {
			while (ii < 64)
				retVals[ii++] = maxPower;
		}
	}
	return AH_TRUE;
}

/*
 * Takes a single calibration curve and creates a power table.
 * Adjusts the new power table so the max power is relative
 * to the maximum index in the power table.
 *
 * WARNING: rates must be adjusted for this relative power table
 */
static int16_t
getPminAndPcdacTableFromPowerTable(int16_t *pwrTableT4, u_int16_t retVals[])
{
    int16_t ii, jj, jjMax;
    int16_t pMin, currPower, pMax;

    /* If the spread is > 31.5dB, keep the upper 31.5dB range */
    if ((pwrTableT4[63] - pwrTableT4[0]) > 126) {
        pMin = pwrTableT4[63] - 126;
    } else {
        pMin = pwrTableT4[0];
    }

    pMax = pwrTableT4[63];
    jjMax = 63;

    /* Search for highest pcdac 0.25dB below maxPower */
    while ((pwrTableT4[jjMax] > (pMax - 1) ) && (jjMax >= 0)) {
        jjMax--;
    }

    jj = jjMax;
    currPower = pMax;
    for (ii = 63; ii >= 0; ii--) {
        while ((jj < 64) && (jj > 0) && (pwrTableT4[jj] >= currPower)) {
            jj--;
        }
        if (jj == 0) {
            while (ii >= 0) {
                retVals[ii] = retVals[ii + 1];
                ii--;
            }
            break;
        }
        retVals[ii] = jj;
        currPower -= 2;  // corresponds to a 0.5dB step
    }
    return pMin;
}

/*
 * Combines the XPD curves from two calibration sets into a single
 * power table and adjusts the power table so the max power is relative
 * to the maximum index in the power table
 *
 * WARNING: rates must be adjusted for this relative power table
 */
static int16_t
getPminAndPcdacTableFromTwoPowerTables(int16_t *pwrTableLXpdT4,
	int16_t *pwrTableHXpdT4, u_int16_t retVals[], int16_t *pMid)
{
    int16_t     ii, jj, jjMax;
    int16_t     pMin, pMax, currPower;
    int16_t     *pwrTableT4;
    u_int16_t    msbFlag = 0x40;  // turns on the 7th bit of the pcdac

    /* If the spread is > 31.5dB, keep the upper 31.5dB range */
    if ((pwrTableLXpdT4[63] - pwrTableHXpdT4[0]) > 126) {
        pMin = pwrTableLXpdT4[63] - 126;
    } else {
        pMin = pwrTableHXpdT4[0];
    }

    pMax = pwrTableLXpdT4[63];
    jjMax = 63;
    /* Search for highest pcdac 0.25dB below maxPower */
    while ((pwrTableLXpdT4[jjMax] > (pMax - 1) ) && (jjMax >= 0)){
        jjMax--;
    }

    *pMid = pwrTableHXpdT4[63];
    jj = jjMax;
    ii = 63;
    currPower = pMax;
    pwrTableT4 = &(pwrTableLXpdT4[0]);
    while (ii >= 0) {
        if ((currPower <= *pMid) || ( (jj == 0) && (msbFlag == 0x40))){
            msbFlag = 0x00;
            pwrTableT4 = &(pwrTableHXpdT4[0]);
            jj = 63;
        }
        while ((jj > 0) && (pwrTableT4[jj] >= currPower)) {
            jj--;
        }
        if ((jj == 0) && (msbFlag == 0x00)) {
            while (ii >= 0) {
                retVals[ii] = retVals[ii+1];
                ii--;
            }
            break;
        }
        retVals[ii] = jj | msbFlag;
        currPower -= 2;  // corresponds to a 0.5dB step
        ii--;
    }
    return pMin;
}

/*
 * Free memory for analog bank scratch buffers
 */
static void
ar5112Detach(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
ar5112GetMinPower(struct ath_hal *ah, EXPN_DATA_PER_CHANNEL_5112 *data)
{
	int i, minIndex;
	int16_t minGain,minPwr,minPcdac,retVal;

	/* Assume NUM_POINTS_XPD0 > 0 */
	minGain = data->pDataPerXPD[0].xpd_gain;
	for (minIndex=0,i=1; i<NUM_XPD_PER_CHANNEL; i++) {
		if (data->pDataPerXPD[i].xpd_gain < minGain) {
			minIndex = i;
			minGain = data->pDataPerXPD[i].xpd_gain;
		}
	}
	minPwr = data->pDataPerXPD[minIndex].pwr_t4[0];
	minPcdac = data->pDataPerXPD[minIndex].pcdac[0];
	for (i=1; i<NUM_POINTS_XPD0; i++) {
		if (data->pDataPerXPD[minIndex].pwr_t4[i] < minPwr) {
			minPwr = data->pDataPerXPD[minIndex].pwr_t4[i];
			minPcdac = data->pDataPerXPD[minIndex].pcdac[i];
		}
	}
	retVal = minPwr - (minPcdac*2);
	return(retVal);
}
	
static HAL_BOOL
ar5112GetChannelMaxMinPower(struct ath_hal *ah, HAL_CHANNEL *chan, int16_t *maxPow,
			    int16_t *minPow)
{
	struct ath_hal_5212 *ahp = (struct ath_hal_5212 *) ah;
	int numChannels=0,i,last;
	int totalD, totalF,totalMin;
	EXPN_DATA_PER_CHANNEL_5112 *data=AH_NULL;
	EEPROM_POWER_EXPN_5112 *powerArray=AH_NULL;

	*maxPow = 0;
	if (IS_CHAN_A(chan)) {
		powerArray = ahp->ah_modePowerArray5112;
		data = powerArray[headerInfo11A].pDataPerChannel;
		numChannels = powerArray[headerInfo11A].numChannels;
	} else if (IS_CHAN_G(chan) || IS_CHAN_108G(chan)) {
		/* XXX - is this correct? Should we also use the same power for turbo G? */
		powerArray = ahp->ah_modePowerArray5112;
		data = powerArray[headerInfo11G].pDataPerChannel;
		numChannels = powerArray[headerInfo11G].numChannels;
	} else if (IS_CHAN_B(chan)) {
		powerArray = ahp->ah_modePowerArray5112;
		data = powerArray[headerInfo11B].pDataPerChannel;
		numChannels = powerArray[headerInfo11B].numChannels;
	} else {
		return (AH_TRUE);
	}
	/* 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 = data[0].maxPower_t4;
			*minPow = ar5112GetMinPower(ah, &data[0]);
			return(AH_TRUE);
		} else {
			*maxPow = data[numChannels - 1].maxPower_t4;
			*minPow = ar5112GetMinPower(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 = data[i].maxPower_t4 - data[last].maxPower_t4;
		*maxPow = (int8_t) ((totalF*(chan->channel-data[last].channelValue) + data[last].maxPower_t4*totalD)/totalD);

		totalMin = ar5112GetMinPower(ah,&data[i]) - ar5112GetMinPower(ah, &data[last]);
		*minPow = (int8_t) ((totalMin*(chan->channel-data[last].channelValue) + ar5112GetMinPower(ah, &data[last])*totalD)/totalD);
		return (AH_TRUE);
	} else {
		if (chan->channel == data[i].channelValue) {
			*maxPow = data[i].maxPower_t4;
			*minPow = ar5112GetMinPower(ah, &data[i]);
			return(AH_TRUE);
		} else
			return(AH_FALSE);
	}
}
	
static HAL_BOOL
ar5112GetChipPowerLimits(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 (ar5112GetChannelMaxMinPower(ah, &chans[i], &maxPow, &minPow)) {
			/* XXX -Need to adjust pcdac values to indicate dBm */
			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
ar5112RfAttach(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_5112));
	if (ahp->ah_analogBanks == AH_NULL) {
		ath_hal_printf(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 * sizeof(u_int16_t);
	ahp->ah_pcdacTable = ath_hal_malloc(ahp->ah_pcdacTableSize);
	if (ahp->ah_pcdacTable == AH_NULL) {
		ath_hal_printf(ah, "%s: cannot allocate PCDAC table\n", __func__);
		*status = HAL_ENOMEM;		/* XXX */
		return AH_FALSE;
	}

	ahp->ah_pcdacTableSize = PWR_TABLE_SIZE;
	ahp->ah_rfHal.rfDetach		= ar5112Detach;
	ahp->ah_rfHal.writeRegs		= ar5112WriteRegs;
	ahp->ah_rfHal.getRfBank		= ar5112GetRfBank;
	ahp->ah_rfHal.setChannel	= ar5112SetChannel;
	ahp->ah_rfHal.setRfRegs		= ar5112SetRfRegs;
	ahp->ah_rfHal.setPowerTable	= ar5112SetPowerTable;
	ahp->ah_rfHal.getChipPowerLim	= ar5112GetChipPowerLimits;

	return AH_TRUE;
}

#endif /* AH_SUPPORT_5112 */