ar5112.c

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/*-
 * SPDX-License-Identifier: ISC
 *
 * Copyright (c) 2002-2009 Sam Leffler, Errno Consulting
 * Copyright (c) 2002-2008 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.
 *
 * $FreeBSD$
 */
#include "opt_ah.h"
 
#include "ah.h"
#include "ah_internal.h"
 
#include "ah_eeprom_v3.h"
 
#include "ar5212/ar5212.h"
#include "ar5212/ar5212reg.h"
#include "ar5212/ar5212phy.h"
 
#define AH_5212_5112
#include "ar5212/ar5212.ini"
 
#define N(a)    (sizeof(a)/sizeof(a[0]))
 
struct ar5112State {
        RF_HAL_FUNCS    base;           /* public state, must be first */
        uint16_t        pcdacTable[PWR_TABLE_SIZE];
 
        uint32_t        Bank1Data[N(ar5212Bank1_5112)];
        uint32_t        Bank2Data[N(ar5212Bank2_5112)];
        uint32_t        Bank3Data[N(ar5212Bank3_5112)];
        uint32_t        Bank6Data[N(ar5212Bank6_5112)];
        uint32_t        Bank7Data[N(ar5212Bank7_5112)];
};
#define AR5112(ah)      ((struct ar5112State *) AH5212(ah)->ah_rfHal)
 
static  void ar5212GetLowerUpperIndex(uint16_t v,
                uint16_t *lp, uint16_t listSize,
                uint32_t *vlo, uint32_t *vhi);
static HAL_BOOL getFullPwrTable(uint16_t numPcdacs, uint16_t *pcdacs,
                int16_t *power, int16_t maxPower, int16_t *retVals);
static int16_t getPminAndPcdacTableFromPowerTable(int16_t *pwrTableT4,
                uint16_t retVals[]);
static int16_t getPminAndPcdacTableFromTwoPowerTables(int16_t *pwrTableLXpdT4,
                int16_t *pwrTableHXpdT4, uint16_t retVals[], int16_t *pMid);
static int16_t interpolate_signed(uint16_t target,
                uint16_t srcLeft, uint16_t srcRight,
                int16_t targetLeft, int16_t targetRight);
 
extern  void ar5212ModifyRfBuffer(uint32_t *rfBuf, uint32_t reg32,
                uint32_t numBits, uint32_t firstBit, uint32_t column);
 
static void
ar5112WriteRegs(struct ath_hal *ah, u_int modesIndex, u_int freqIndex,
        int writes)
{
        HAL_INI_WRITE_ARRAY(ah, ar5212Modes_5112, modesIndex, writes);
        HAL_INI_WRITE_ARRAY(ah, ar5212Common_5112, 1, writes);
        HAL_INI_WRITE_ARRAY(ah, ar5212BB_RfGain_5112, freqIndex, writes);
}
 
/*
 * Take the MHz channel value and set the Channel value
 *
 * ASSUMES: Writes enabled to analog bus
 */
static HAL_BOOL
ar5112SetChannel(struct ath_hal *ah, const struct ieee80211_channel *chan)
{
        uint16_t freq = ath_hal_gethwchannel(ah, chan);
        uint32_t channelSel  = 0;
        uint32_t bModeSynth  = 0;
        uint32_t aModeRefSel = 0;
        uint32_t reg32       = 0;
 
        OS_MARK(ah, AH_MARK_SETCHANNEL, freq);
 
        if (freq < 4800) {
                uint32_t txctl;
 
                if (((freq - 2192) % 5) == 0) {
                        channelSel = ((freq - 672) * 2 - 3040)/10;
                        bModeSynth = 0;
                } else if (((freq - 2224) % 5) == 0) {
                        channelSel = ((freq - 704) * 2 - 3040) / 10;
                        bModeSynth = 1;
                } else {
                        HALDEBUG(ah, HAL_DEBUG_ANY,
                            "%s: invalid channel %u MHz\n",
                            __func__, freq);
                        return AH_FALSE;
                }
 
                channelSel = (channelSel << 2) & 0xff;
                channelSel = ath_hal_reverseBits(channelSel, 8);
 
                txctl = OS_REG_READ(ah, AR_PHY_CCK_TX_CTRL);
                if (freq == 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 (((freq % 5) == 2) && (freq <= 5435)) {
                freq = freq - 2; /* Align to even 5MHz raster */
                channelSel = ath_hal_reverseBits(
                        (uint32_t)(((freq - 4800)*10)/25 + 1), 8);
                aModeRefSel = ath_hal_reverseBits(0, 2);
        } else if ((freq % 20) == 0 && freq >= 5120) {
                channelSel = ath_hal_reverseBits(
                        ((freq - 4800) / 20 << 2), 8);
                aModeRefSel = ath_hal_reverseBits(3, 2);
        } else if ((freq % 10) == 0) {
                channelSel = ath_hal_reverseBits(
                        ((freq - 4800) / 10 << 1), 8);
                aModeRefSel = ath_hal_reverseBits(2, 2);
        } else if ((freq % 5) == 0) {
                channelSel = ath_hal_reverseBits(
                        (freq - 4800) / 5, 8);
                aModeRefSel = ath_hal_reverseBits(1, 2);
        } else {
                HALDEBUG(ah, HAL_DEBUG_ANY, "%s: invalid channel %u MHz\n",
                    __func__, freq);
                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 uint32_t *
ar5112GetRfBank(struct ath_hal *ah, int bank)
{
        struct ar5112State *priv = AR5112(ah);
 
        HALASSERT(priv != AH_NULL);
        switch (bank) {
        case 1: return priv->Bank1Data;
        case 2: return priv->Bank2Data;
        case 3: return priv->Bank3Data;
        case 6: return priv->Bank6Data;
        case 7: return priv->Bank7Data;
        }
        HALDEBUG(ah, HAL_DEBUG_ANY, "%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,
        const struct ieee80211_channel *chan,
        uint16_t modesIndex, uint16_t *rfXpdGain)
{
#define RF_BANK_SETUP(_priv, _ix, _col) do {                                \
        int i;                                                              \
        for (i = 0; i < N(ar5212Bank##_ix##_5112); i++)                     \
                (_priv)->Bank##_ix##Data[i] = ar5212Bank##_ix##_5112[i][_col];\
} while (0)
        uint16_t freq = ath_hal_gethwchannel(ah, chan);
        struct ath_hal_5212 *ahp = AH5212(ah);
        const HAL_EEPROM *ee = AH_PRIVATE(ah)->ah_eeprom;
        uint16_t rfXpdSel, gainI;
        uint16_t ob5GHz = 0, db5GHz = 0;
        uint16_t ob2GHz = 0, db2GHz = 0;
        struct ar5112State *priv = AR5112(ah);
        GAIN_VALUES *gv = &ahp->ah_gainValues;
        int regWrites = 0;
 
        HALASSERT(priv);
 
        HALDEBUG(ah, HAL_DEBUG_RFPARAM, "%s: chan %u/0x%x modesIndex %u\n",
            __func__, chan->ic_freq, chan->ic_flags, modesIndex);
 
        /* Setup rf parameters */
        switch (chan->ic_flags & IEEE80211_CHAN_ALLFULL) {
        case IEEE80211_CHAN_A:
                if (freq > 4000 && freq < 5260) {
                        ob5GHz = ee->ee_ob1;
                        db5GHz = ee->ee_db1;
                } else if (freq >= 5260 && freq < 5500) {
                        ob5GHz = ee->ee_ob2;
                        db5GHz = ee->ee_db2;
                } else if (freq >= 5500 && freq < 5725) {
                        ob5GHz = ee->ee_ob3;
                        db5GHz = ee->ee_db3;
                } else if (freq >= 5725) {
                        ob5GHz = ee->ee_ob4;
                        db5GHz = ee->ee_db4;
                } else {
                        /* XXX else */
                }
                rfXpdSel = ee->ee_xpd[headerInfo11A];
                gainI = ee->ee_gainI[headerInfo11A];
                break;
        case IEEE80211_CHAN_B:
                ob2GHz = ee->ee_ob2GHz[0];
                db2GHz = ee->ee_db2GHz[0];
                rfXpdSel = ee->ee_xpd[headerInfo11B];
                gainI = ee->ee_gainI[headerInfo11B];
                break;
        case IEEE80211_CHAN_G:
        case IEEE80211_CHAN_PUREG:      /* NB: really 108G */
                ob2GHz = ee->ee_ob2GHz[1];
                db2GHz = ee->ee_ob2GHz[1];
                rfXpdSel = ee->ee_xpd[headerInfo11G];
                gainI = ee->ee_gainI[headerInfo11G];
                break;
        default:
                HALDEBUG(ah, HAL_DEBUG_ANY, "%s: invalid channel flags 0x%x\n",
                    __func__, chan->ic_flags);
                return AH_FALSE;
        }
 
        /* Setup Bank 1 Write */
        RF_BANK_SETUP(priv, 1, 1);
 
        /* Setup Bank 2 Write */
        RF_BANK_SETUP(priv, 2, modesIndex);
 
        /* Setup Bank 3 Write */
        RF_BANK_SETUP(priv, 3, modesIndex);
 
        /* Setup Bank 6 Write */
        RF_BANK_SETUP(priv, 6, modesIndex);
 
        ar5212ModifyRfBuffer(priv->Bank6Data, rfXpdSel,     1, 302, 0);
 
        ar5212ModifyRfBuffer(priv->Bank6Data, rfXpdGain[0], 2, 270, 0);
        ar5212ModifyRfBuffer(priv->Bank6Data, rfXpdGain[1], 2, 257, 0);
 
        if (IEEE80211_IS_CHAN_OFDM(chan)) {
                ar5212ModifyRfBuffer(priv->Bank6Data,
                        gv->currStep->paramVal[GP_PWD_138], 1, 168, 3);
                ar5212ModifyRfBuffer(priv->Bank6Data,
                        gv->currStep->paramVal[GP_PWD_137], 1, 169, 3);
                ar5212ModifyRfBuffer(priv->Bank6Data,
                        gv->currStep->paramVal[GP_PWD_136], 1, 170, 3);
                ar5212ModifyRfBuffer(priv->Bank6Data,
                        gv->currStep->paramVal[GP_PWD_132], 1, 174, 3);
                ar5212ModifyRfBuffer(priv->Bank6Data,
                        gv->currStep->paramVal[GP_PWD_131], 1, 175, 3);
                ar5212ModifyRfBuffer(priv->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 (IEEE80211_IS_CHAN_2GHZ(chan)) {
                ar5212ModifyRfBuffer(priv->Bank6Data, ob2GHz, 3, 287, 0);
                ar5212ModifyRfBuffer(priv->Bank6Data, db2GHz, 3, 290, 0);
        } else {
                ar5212ModifyRfBuffer(priv->Bank6Data, ob5GHz, 3, 279, 0);
                ar5212ModifyRfBuffer(priv->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(priv->Bank6Data, 2, 2, 90, 2);
                ar5212ModifyRfBuffer(priv->Bank6Data, 2, 2, 92, 2);
                ar5212ModifyRfBuffer(priv->Bank6Data, 2, 2, 94, 2);
                ar5212ModifyRfBuffer(priv->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(priv->Bank6Data, 1, 1, 281, 1);
        ar5212ModifyRfBuffer(priv->Bank6Data, 1, 2, 1, 3);
        ar5212ModifyRfBuffer(priv->Bank6Data, 1, 2, 3, 3);
        ar5212ModifyRfBuffer(priv->Bank6Data, 1, 1, 139, 3);
        ar5212ModifyRfBuffer(priv->Bank6Data, 1, 1, 140, 3);
    }
 
        /* Setup Bank 7 Setup */
        RF_BANK_SETUP(priv, 7, modesIndex);
        if (IEEE80211_IS_CHAN_OFDM(chan))
                ar5212ModifyRfBuffer(priv->Bank7Data,
                        gv->currStep->paramVal[GP_MIXGAIN_OVR], 2, 37, 0);
 
        ar5212ModifyRfBuffer(priv->Bank7Data, gainI, 6, 14, 0);
 
        /* Adjust params for Derby TX power control */
        if (IEEE80211_IS_CHAN_HALF(chan) || IEEE80211_IS_CHAN_QUARTER(chan)) {
                uint32_t        rfDelay, rfPeriod;
 
                rfDelay = 0xf;
                rfPeriod = (IEEE80211_IS_CHAN_HALF(chan)) ?  0x8 : 0xf;
                ar5212ModifyRfBuffer(priv->Bank7Data, rfDelay, 4, 58, 0);
                ar5212ModifyRfBuffer(priv->Bank7Data, rfPeriod, 4, 70, 0);
        }
 
#ifdef notyet
        /* Analog registers are setup - EAR can modify */
        if (ar5212IsEarEngaged(pDev, chan))
                uint32_t modifier;
                ar5212EarModify(pDev, EAR_LC_RF_WRITE, chan, &modifier);
#endif
        /* Write Analog registers */
        HAL_INI_WRITE_BANK(ah, ar5212Bank1_5112, priv->Bank1Data, regWrites);
        HAL_INI_WRITE_BANK(ah, ar5212Bank2_5112, priv->Bank2Data, regWrites);
        HAL_INI_WRITE_BANK(ah, ar5212Bank3_5112, priv->Bank3Data, regWrites);
        HAL_INI_WRITE_BANK(ah, ar5212Bank6_5112, priv->Bank6Data, regWrites);
        HAL_INI_WRITE_BANK(ah, ar5212Bank7_5112, priv->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,
        const struct ieee80211_channel *chan,
        uint16_t *rfXpdGain)
{
        uint16_t freq = ath_hal_gethwchannel(ah, chan);
        struct ath_hal_5212 *ahp = AH5212(ah);
        const HAL_EEPROM *ee = AH_PRIVATE(ah)->ah_eeprom;
        uint32_t numXpdGain = IS_RADX112_REV2(ah) ? 2 : 1;
        uint32_t    xpdGainMask = 0;
        int16_t     powerMid, *pPowerMid = &powerMid;
 
        const EXPN_DATA_PER_CHANNEL_5112 *pRawCh;
        const EEPROM_POWER_EXPN_5112     *pPowerExpn = AH_NULL;
 
        uint32_t    ii, jj, kk;
        int16_t     minPwr_t4, maxPwr_t4, Pmin, Pmid;
 
        uint32_t    chan_idx_L = 0, chan_idx_R = 0;
        uint16_t    chan_L, chan_R;
 
        int16_t     pwr_table0[64];
        int16_t     pwr_table1[64];
        uint16_t    pcdacs[10];
        int16_t     powers[10];
        uint16_t    numPcd;
        int16_t     powTableLXPD[2][64];
        int16_t     powTableHXPD[2][64];
        int16_t     tmpPowerTable[64];
        uint16_t    xgainList[2];
        uint16_t    xpdMask;
 
        switch (chan->ic_flags & IEEE80211_CHAN_ALLTURBOFULL) {
        case IEEE80211_CHAN_A:
        case IEEE80211_CHAN_ST:
                pPowerExpn = &ee->ee_modePowerArray5112[headerInfo11A];
                xpdGainMask = ee->ee_xgain[headerInfo11A];
                break;
        case IEEE80211_CHAN_B:
                pPowerExpn = &ee->ee_modePowerArray5112[headerInfo11B];
                xpdGainMask = ee->ee_xgain[headerInfo11B];
                break;
        case IEEE80211_CHAN_G:
        case IEEE80211_CHAN_108G:
                pPowerExpn = &ee->ee_modePowerArray5112[headerInfo11G];
                xpdGainMask = ee->ee_xgain[headerInfo11G];
                break;
        default:
                HALDEBUG(ah, HAL_DEBUG_ANY, "%s: unknown channel flags 0x%x\n",
                    __func__, chan->ic_flags);
                return AH_FALSE;
        }
 
        if ((xpdGainMask & pPowerExpn->xpdMask) < 1) {
                HALDEBUG(ah, HAL_DEBUG_ANY,
                    "%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, HAL_DEBUG_ANY,
                                    "A maximum of 2 xpdGains supported"
                                    "in pExpnPower data\n");
                                return AH_FALSE;
                        }
                        xgainList[kk++] = (uint16_t)jj;
                }
        }
 
        ar5212GetLowerUpperIndex(freq, &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(uint16_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(uint16_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));
 
                        jj = xgainList[1];
                        numPcd = pRawCh->pDataPerXPD[jj].numPcdacs;
                        OS_MEMCPY(&pcdacs[0], &pRawCh->pDataPerXPD[jj].pcdac[0],
                                numPcd * sizeof(uint16_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(
                                freq, 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(
                                freq, chan_L, chan_R,
                                powTableLXPD[0][jj], powTableLXPD[kk][jj]);
                        pwr_table1[jj] = interpolate_signed(
                                freq, 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(uint16_t target, uint16_t srcLeft, uint16_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(uint16_t v, uint16_t *lp, uint16_t listSize,
                          uint32_t *vlo, uint32_t *vhi)
{
        uint32_t target = v;
        uint16_t *ep = lp+listSize;
        uint16_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(uint16_t numPcdacs, uint16_t *pcdacs, int16_t *power, int16_t maxPower, int16_t *retVals)
{
        uint16_t    ii;
        uint16_t    idxL = 0;
        uint16_t    idxR = 1;
 
        if (numPcdacs < 2) {
                HALDEBUG(AH_NULL, HAL_DEBUG_ANY,
                     "%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, uint16_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, uint16_t retVals[], int16_t *pMid)
{
    int16_t     ii, jj, jjMax;
    int16_t     pMin, pMax, currPower;
    int16_t     *pwrTableT4;
    uint16_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;
}
 
static int16_t
ar5112GetMinPower(struct ath_hal *ah, const 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,
        const struct ieee80211_channel *chan,
        int16_t *maxPow, int16_t *minPow)
{
        uint16_t freq = chan->ic_freq;          /* NB: never mapped */
        const HAL_EEPROM *ee = AH_PRIVATE(ah)->ah_eeprom;
        int numChannels=0,i,last;
        int totalD, totalF,totalMin;
        const EXPN_DATA_PER_CHANNEL_5112 *data=AH_NULL;
        const EEPROM_POWER_EXPN_5112 *powerArray=AH_NULL;
 
        *maxPow = 0;
        if (IEEE80211_IS_CHAN_A(chan)) {
                powerArray = ee->ee_modePowerArray5112;
                data = powerArray[headerInfo11A].pDataPerChannel;
                numChannels = powerArray[headerInfo11A].numChannels;
        } else if (IEEE80211_IS_CHAN_G(chan) || IEEE80211_IS_CHAN_108G(chan)) {
                /* XXX - is this correct? Should we also use the same power for turbo G? */
                powerArray = ee->ee_modePowerArray5112;
                data = powerArray[headerInfo11G].pDataPerChannel;
                numChannels = powerArray[headerInfo11G].numChannels;
        } else if (IEEE80211_IS_CHAN_B(chan)) {
                powerArray = ee->ee_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 ((freq < data[0].channelValue) ||
            (freq > data[numChannels-1].channelValue)) {
                if (freq < 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) && (freq > 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*(freq-data[last].channelValue) + data[last].maxPower_t4*totalD)/totalD);
 
                totalMin = ar5112GetMinPower(ah,&data[i]) - ar5112GetMinPower(ah, &data[last]);
                *minPow = (int8_t) ((totalMin*(freq-data[last].channelValue) + ar5112GetMinPower(ah, &data[last])*totalD)/totalD);
                return (AH_TRUE);
        } else {
                if (freq == data[i].channelValue) {
                        *maxPow = data[i].maxPower_t4;
                        *minPow = ar5112GetMinPower(ah, &data[i]);
                        return(AH_TRUE);
                } else
                        return(AH_FALSE);
        }
}
 
/*
 * Free memory for analog bank scratch buffers
 */
static void
ar5112RfDetach(struct ath_hal *ah)
{
        struct ath_hal_5212 *ahp = AH5212(ah);
 
        HALASSERT(ahp->ah_rfHal != AH_NULL);
        ath_hal_free(ahp->ah_rfHal);
        ahp->ah_rfHal = AH_NULL;
}
 
/*
 * Allocate memory for analog bank scratch buffers
 * Scratch Buffer will be reinitialized every reset so no need to zero now
 */
static HAL_BOOL
ar5112RfAttach(struct ath_hal *ah, HAL_STATUS *status)
{
        struct ath_hal_5212 *ahp = AH5212(ah);
        struct ar5112State *priv;
 
        HALASSERT(ah->ah_magic == AR5212_MAGIC);
 
        HALASSERT(ahp->ah_rfHal == AH_NULL);
        priv = ath_hal_malloc(sizeof(struct ar5112State));
        if (priv == AH_NULL) {
                HALDEBUG(ah, HAL_DEBUG_ANY,
                    "%s: cannot allocate private state\n", __func__);
                *status = HAL_ENOMEM;           /* XXX */
                return AH_FALSE;
        }
        priv->base.rfDetach             = ar5112RfDetach;
        priv->base.writeRegs            = ar5112WriteRegs;
        priv->base.getRfBank            = ar5112GetRfBank;
        priv->base.setChannel           = ar5112SetChannel;
        priv->base.setRfRegs            = ar5112SetRfRegs;
        priv->base.setPowerTable        = ar5112SetPowerTable;
        priv->base.getChannelMaxMinPower = ar5112GetChannelMaxMinPower;
        priv->base.getNfAdjust          = ar5212GetNfAdjust;
 
        ahp->ah_pcdacTable = priv->pcdacTable;
        ahp->ah_pcdacTableSize = sizeof(priv->pcdacTable);
        ahp->ah_rfHal = &priv->base;
 
        return AH_TRUE;
}
 
static HAL_BOOL
ar5112Probe(struct ath_hal *ah)
{
        return IS_RAD5112(ah);
}
AH_RF(RF5112, ar5112Probe, ar5112RfAttach);