eeprom.c

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/*
 * Copyright (c) 2008-2011 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"

void ath9k_hw_analog_shift_regwrite(struct ath_hw *ah, u32 reg, u32 val)
{
        REG_WRITE(ah, reg, val);

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

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);
}

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;
}

void ath9k_hw_usb_gen_fill_eeprom(struct ath_hw *ah, u16 *eep_data,
                  int eep_start_loc, int size)
{
    int i = 0, j, addr;
    u32 addrdata[8];
    u32 data[8];

    for (addr = 0; addr < size; addr++) {
        addrdata[i] = AR5416_EEPROM_OFFSET +
            ((addr + eep_start_loc) << AR5416_EEPROM_S);
        i++;
        if (i == 8) {
            REG_READ_MULTI(ah, addrdata, data, i);

            for (j = 0; j < i; j++) {
                *eep_data = data[j];
                eep_data++;
            }
            i = 0;
        }
    }

    if (i != 0) {
        REG_READ_MULTI(ah, addrdata, data, i);

        for (j = 0; j < i; j++) {
            *eep_data = data[j];
            eep_data++;
        }
    }
}

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

    return twiceMaxEdgePower;
}

u16 ath9k_hw_get_scaled_power(struct ath_hw *ah, u16 power_limit,
                  u8 antenna_reduction)
{
    u16 reduction = antenna_reduction;

    /*
     * Reduce scaled Power by number of chains active
     * to get the per chain tx power level.
     */
    switch (ar5416_get_ntxchains(ah->txchainmask)) {
    case 1:
        break;
    case 2:
        reduction += POWER_CORRECTION_FOR_TWO_CHAIN;
        break;
    case 3:
        reduction += POWER_CORRECTION_FOR_THREE_CHAIN;
        break;
    }

    if (power_limit > reduction)
        power_limit -= reduction;
    else
        power_limit = 0;

    return power_limit;
}

void ath9k_hw_update_regulatory_maxpower(struct ath_hw *ah)
{
    struct ath_common *common = ath9k_hw_common(ah);
    struct ath_regulatory *regulatory = ath9k_hw_regulatory(ah);

    switch (ar5416_get_ntxchains(ah->txchainmask)) {
    case 1:
        break;
    case 2:
        regulatory->max_power_level += POWER_CORRECTION_FOR_TWO_CHAIN;
        break;
    case 3:
        regulatory->max_power_level += POWER_CORRECTION_FOR_THREE_CHAIN;
        break;
    default:
        ath_dbg(common, EEPROM, "Invalid chainmask configuration\n");
        break;
    }
}

void ath9k_hw_get_gain_boundaries_pdadcs(struct ath_hw *ah,
                struct ath9k_channel *chan,
                void *pRawDataSet,
                u8 *bChans, u16 availPiers,
                u16 tPdGainOverlap,
                u16 *pPdGainBoundaries, u8 *pPDADCValues,
                u16 numXpdGains)
{
    int i, j, k;
    int16_t ss;
    u16 idxL = 0, idxR = 0, numPiers;
    static u8 vpdTableL[AR5416_NUM_PD_GAINS]
        [AR5416_MAX_PWR_RANGE_IN_HALF_DB];
    static u8 vpdTableR[AR5416_NUM_PD_GAINS]
        [AR5416_MAX_PWR_RANGE_IN_HALF_DB];
    static u8 vpdTableI[AR5416_NUM_PD_GAINS]
        [AR5416_MAX_PWR_RANGE_IN_HALF_DB];

    u8 *pVpdL, *pVpdR, *pPwrL, *pPwrR;
    u8 minPwrT4[AR5416_NUM_PD_GAINS];
    u8 maxPwrT4[AR5416_NUM_PD_GAINS];
    int16_t vpdStep;
    int16_t tmpVal;
    u16 sizeCurrVpdTable, maxIndex, tgtIndex;
    bool match;
    int16_t minDelta = 0;
    struct chan_centers centers;
    int pdgain_boundary_default;
    struct cal_data_per_freq *data_def = pRawDataSet;
    struct cal_data_per_freq_4k *data_4k = pRawDataSet;
    struct cal_data_per_freq_ar9287 *data_9287 = pRawDataSet;
    bool eeprom_4k = AR_SREV_9285(ah) || AR_SREV_9271(ah);
    int intercepts;

    if (AR_SREV_9287(ah))
        intercepts = AR9287_PD_GAIN_ICEPTS;
    else
        intercepts = AR5416_PD_GAIN_ICEPTS;

    memset(&minPwrT4, 0, AR5416_NUM_PD_GAINS);
    ath9k_hw_get_channel_centers(ah, chan, &centers);

    for (numPiers = 0; numPiers < availPiers; numPiers++) {
        if (bChans[numPiers] == AR5416_BCHAN_UNUSED)
            break;
    }

    match = ath9k_hw_get_lower_upper_index((u8)FREQ2FBIN(centers.synth_center,
                                 IS_CHAN_2GHZ(chan)),
                           bChans, numPiers, &idxL, &idxR);

    if (match) {
        if (AR_SREV_9287(ah)) {
            /* FIXME: array overrun? */
            for (i = 0; i < numXpdGains; i++) {
                minPwrT4[i] = data_9287[idxL].pwrPdg[i][0];
                maxPwrT4[i] = data_9287[idxL].pwrPdg[i][4];
                ath9k_hw_fill_vpd_table(minPwrT4[i], maxPwrT4[i],
                        data_9287[idxL].pwrPdg[i],
                        data_9287[idxL].vpdPdg[i],
                        intercepts,
                        vpdTableI[i]);
            }
        } else if (eeprom_4k) {
            for (i = 0; i < numXpdGains; i++) {
                minPwrT4[i] = data_4k[idxL].pwrPdg[i][0];
                maxPwrT4[i] = data_4k[idxL].pwrPdg[i][4];
                ath9k_hw_fill_vpd_table(minPwrT4[i], maxPwrT4[i],
                        data_4k[idxL].pwrPdg[i],
                        data_4k[idxL].vpdPdg[i],
                        intercepts,
                        vpdTableI[i]);
            }
        } else {
            for (i = 0; i < numXpdGains; i++) {
                minPwrT4[i] = data_def[idxL].pwrPdg[i][0];
                maxPwrT4[i] = data_def[idxL].pwrPdg[i][4];
                ath9k_hw_fill_vpd_table(minPwrT4[i], maxPwrT4[i],
                        data_def[idxL].pwrPdg[i],
                        data_def[idxL].vpdPdg[i],
                        intercepts,
                        vpdTableI[i]);
            }
        }
    } else {
        for (i = 0; i < numXpdGains; i++) {
            if (AR_SREV_9287(ah)) {
                pVpdL = data_9287[idxL].vpdPdg[i];
                pPwrL = data_9287[idxL].pwrPdg[i];
                pVpdR = data_9287[idxR].vpdPdg[i];
                pPwrR = data_9287[idxR].pwrPdg[i];
            } else if (eeprom_4k) {
                pVpdL = data_4k[idxL].vpdPdg[i];
                pPwrL = data_4k[idxL].pwrPdg[i];
                pVpdR = data_4k[idxR].vpdPdg[i];
                pPwrR = data_4k[idxR].pwrPdg[i];
            } else {
                pVpdL = data_def[idxL].vpdPdg[i];
                pPwrL = data_def[idxL].pwrPdg[i];
                pVpdR = data_def[idxR].vpdPdg[i];
                pPwrR = data_def[idxR].pwrPdg[i];
            }

            minPwrT4[i] = max(pPwrL[0], pPwrR[0]);

            maxPwrT4[i] =
                min(pPwrL[intercepts - 1],
                    pPwrR[intercepts - 1]);


            ath9k_hw_fill_vpd_table(minPwrT4[i], maxPwrT4[i],
                        pPwrL, pVpdL,
                        intercepts,
                        vpdTableL[i]);
            ath9k_hw_fill_vpd_table(minPwrT4[i], maxPwrT4[i],
                        pPwrR, pVpdR,
                        intercepts,
                        vpdTableR[i]);

            for (j = 0; j <= (maxPwrT4[i] - minPwrT4[i]) / 2; j++) {
                vpdTableI[i][j] =
                    (u8)(ath9k_hw_interpolate((u16)
                         FREQ2FBIN(centers.
                               synth_center,
                               IS_CHAN_2GHZ
                               (chan)),
                         bChans[idxL], bChans[idxR],
                         vpdTableL[i][j], vpdTableR[i][j]));
            }
        }
    }

    k = 0;

    for (i = 0; i < numXpdGains; i++) {
        if (i == (numXpdGains - 1))
            pPdGainBoundaries[i] =
                (u16)(maxPwrT4[i] / 2);
        else
            pPdGainBoundaries[i] =
                (u16)((maxPwrT4[i] + minPwrT4[i + 1]) / 4);

        pPdGainBoundaries[i] =
            min((u16)MAX_RATE_POWER, pPdGainBoundaries[i]);

        minDelta = 0;

        if (i == 0) {
            if (AR_SREV_9280_20_OR_LATER(ah))
                ss = (int16_t)(0 - (minPwrT4[i] / 2));
            else
                ss = 0;
        } else {
            ss = (int16_t)((pPdGainBoundaries[i - 1] -
                    (minPwrT4[i] / 2)) -
                       tPdGainOverlap + 1 + minDelta);
        }
        vpdStep = (int16_t)(vpdTableI[i][1] - vpdTableI[i][0]);
        vpdStep = (int16_t)((vpdStep < 1) ? 1 : vpdStep);

        while ((ss < 0) && (k < (AR5416_NUM_PDADC_VALUES - 1))) {
            tmpVal = (int16_t)(vpdTableI[i][0] + ss * vpdStep);
            pPDADCValues[k++] = (u8)((tmpVal < 0) ? 0 : tmpVal);
            ss++;
        }

        sizeCurrVpdTable = (u8) ((maxPwrT4[i] - minPwrT4[i]) / 2 + 1);
        tgtIndex = (u8)(pPdGainBoundaries[i] + tPdGainOverlap -
                (minPwrT4[i] / 2));
        maxIndex = (tgtIndex < sizeCurrVpdTable) ?
            tgtIndex : sizeCurrVpdTable;

        while ((ss < maxIndex) && (k < (AR5416_NUM_PDADC_VALUES - 1))) {
            pPDADCValues[k++] = vpdTableI[i][ss++];
        }

        vpdStep = (int16_t)(vpdTableI[i][sizeCurrVpdTable - 1] -
                    vpdTableI[i][sizeCurrVpdTable - 2]);
        vpdStep = (int16_t)((vpdStep < 1) ? 1 : vpdStep);

        if (tgtIndex >= maxIndex) {
            while ((ss <= tgtIndex) &&
                   (k < (AR5416_NUM_PDADC_VALUES - 1))) {
                tmpVal = (int16_t)((vpdTableI[i][sizeCurrVpdTable - 1] +
                            (ss - maxIndex + 1) * vpdStep));
                pPDADCValues[k++] = (u8)((tmpVal > 255) ?
                             255 : tmpVal);
                ss++;
            }
        }
    }

    if (eeprom_4k)
        pdgain_boundary_default = 58;
    else
        pdgain_boundary_default = pPdGainBoundaries[i - 1];

    while (i < AR5416_PD_GAINS_IN_MASK) {
        pPdGainBoundaries[i] = pdgain_boundary_default;
        i++;
    }

    while (k < AR5416_NUM_PDADC_VALUES) {
        pPDADCValues[k] = pPDADCValues[k - 1];
        k++;
    }
}

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

    if (AR_SREV_9300_20_OR_LATER(ah))
        ah->eep_ops = &eep_ar9300_ops;
    else if (AR_SREV_9287(ah)) {
        ah->eep_ops = &eep_ar9287_ops;
    } else if (AR_SREV_9285(ah) || AR_SREV_9271(ah)) {
        ah->eep_ops = &eep_4k_ops;
    } else {
        ah->eep_ops = &eep_def_ops;
    }

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

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

    return status;
}