ath9k_eeprom.c

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/*
 * Copyright (c) 2008-2011 Atheros Communications Inc.
 *
 * Modified for iPXE by Scott K Logan <logans@cottsay.net> July 2011
 * Original from Linux kernel 3.0.1
 *
 * 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.
 */

FILE_SECBOOT ( FORBIDDEN );

#include <ipxe/io.h>

#include "hw.h"

static inline u16 ath9k_hw_fbin2freq(u8 fbin, int is2GHz)
{
        if (fbin == AR5416_BCHAN_UNUSED)
                return fbin;

        return (u16) ((is2GHz) ? (2300 + fbin) : (4800 + 5 * fbin));
}

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;
}

int 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 1;
        }
        if (target >= pList[listSize - 1]) {
                *indexL = *indexR = (u16) (listSize - 1);
                return 1;
        }

        for (i = 0; i < listSize - 1; i++) {
                if (pList[i] == target) {
                        *indexL = *indexR = i;
                        return 1;
                }
                if (target < pList[i + 1]) {
                        *indexL = i;
                        *indexR = (u16) (i + 1);
                        return 0;
                }
        }
        return 0;
}

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++;
                }
        }
}

int 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, int 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, int 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,
                                int 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;
}

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

        switch (ar5416_get_ntxchains(ah->txchainmask)) {
        case 1:
                break;
        case 2:
                regulatory->max_power_level += INCREASE_MAXPOW_BY_TWO_CHAIN;
                break;
        case 3:
                regulatory->max_power_level += INCREASE_MAXPOW_BY_THREE_CHAIN;
                break;
        default:
                DBG2("ath9k: "
                        "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;
        int 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;
        int 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)) {
                        for (i = 0; i < numXpdGains; i++) {
                                minPwrT4[i] = data_9287[idxL].pwrPdg[i][0];
                                maxPwrT4[i] = data_9287[idxL].pwrPdg[i][intercepts - 1];
                                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][intercepts - 1];
                                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][intercepts - 1];
                                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]);

                if ((i == 0) && !AR_SREV_5416_20_OR_LATER(ah)) {
                        minDelta = pPdGainBoundaries[0] - 23;
                        pPdGainBoundaries[0] = 23;
                } else {
                        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;
}