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[netbsd-mini2440.git] / sys / external / isc / atheros_hal / dist / ar5312 / ar5312_reset.c

/*
 * Copyright (c) 2002-2008 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.
 *
 * $Id: ar5312_reset.c,v 1.1.1.1 2008/12/11 04:46:46 alc Exp $
 */
#include "opt_ah.h"

#ifdef AH_SUPPORT_AR5312

#include "ah.h"
#include "ah_internal.h"
#include "ah_devid.h"

#include "ar5312/ar5312.h"
#include "ar5312/ar5312reg.h"
#include "ar5312/ar5312phy.h"

#include "ah_eeprom_v3.h"

/* Additional Time delay to wait after activiting the Base band */
#define BASE_ACTIVATE_DELAY     100     /* 100 usec */
#define PLL_SETTLE_DELAY        300     /* 300 usec */

extern int16_t ar5212GetNf(struct ath_hal *, HAL_CHANNEL_INTERNAL *);
extern void ar5212SetRateDurationTable(struct ath_hal *, HAL_CHANNEL *);
extern HAL_BOOL ar5212SetTransmitPower(struct ath_hal *ah,
                      HAL_CHANNEL_INTERNAL *chan, uint16_t *rfXpdGain);
extern void ar5212SetDeltaSlope(struct ath_hal *, HAL_CHANNEL *);
extern HAL_BOOL ar5212SetBoardValues(struct ath_hal *, HAL_CHANNEL_INTERNAL *);
extern void ar5212SetIFSTiming(struct ath_hal *, HAL_CHANNEL *);
extern HAL_BOOL ar5212IsSpurChannel(struct ath_hal *, HAL_CHANNEL *);
extern HAL_BOOL ar5212ChannelChange(struct ath_hal *, HAL_CHANNEL *);

static HAL_BOOL ar5312SetResetReg(struct ath_hal *, uint32_t resetMask);

static int
write_common(struct ath_hal *ah, const HAL_INI_ARRAY *ia,
        HAL_BOOL bChannelChange, int writes)
{
#define IS_NO_RESET_TIMER_ADDR(x)                      \
    ( (((x) >= AR_BEACON) && ((x) <= AR_CFP_DUR)) || \
      (((x) >= AR_SLEEP1) && ((x) <= AR_SLEEP3)))
#define V(r, c) (ia)->data[((r)*(ia)->cols) + (c)]
        int i;

        /* Write Common Array Parameters */
        for (i = 0; i < ia->rows; i++) {
                uint32_t reg = V(i, 0);
                /* XXX timer/beacon setup registers? */
                /* On channel change, don't reset the PCU registers */
                if (!(bChannelChange && IS_NO_RESET_TIMER_ADDR(reg))) {
                        OS_REG_WRITE(ah, reg, V(i, 1));
                        DMA_YIELD(writes);
                }
        }
        return writes;
#undef IS_NO_RESET_TIMER_ADDR
#undef V
}

/*
 * Places the device in and out of reset and then places sane
 * values in the registers based on EEPROM config, initialization
 * vectors (as determined by the mode), and station configuration
 *
 * bChannelChange is used to preserve DMA/PCU registers across
 * a HW Reset during channel change.
 */
HAL_BOOL
ar5312Reset(struct ath_hal *ah, HAL_OPMODE opmode,
        HAL_CHANNEL *chan, HAL_BOOL bChannelChange, HAL_STATUS *status)
{
#define N(a)    (sizeof (a) / sizeof (a[0]))
#define FAIL(_code)     do { ecode = _code; goto bad; } while (0)
        struct ath_hal_5212 *ahp = AH5212(ah);
        HAL_CHANNEL_INTERNAL *ichan;
        const HAL_EEPROM *ee;
        uint32_t saveFrameSeqCount, saveDefAntenna;
        uint32_t macStaId1, synthDelay, txFrm2TxDStart;
        uint16_t rfXpdGain[MAX_NUM_PDGAINS_PER_CHANNEL];
        int16_t cckOfdmPwrDelta = 0;
        u_int modesIndex, freqIndex;
        HAL_STATUS ecode;
        int i, regWrites = 0;
        uint32_t testReg;
        uint32_t saveLedState = 0;

        HALASSERT(ah->ah_magic == AR5212_MAGIC);
        ee = AH_PRIVATE(ah)->ah_eeprom;

        OS_MARK(ah, AH_MARK_RESET, bChannelChange);
#define IS(_c,_f)       (((_c)->channelFlags & _f) || 0)
        if ((IS(chan, CHANNEL_2GHZ) ^ IS(chan, CHANNEL_5GHZ)) == 0) {
                HALDEBUG(ah, HAL_DEBUG_ANY,
                    "%s: invalid channel %u/0x%x; not marked as 2GHz or 5GHz\n",
                    __func__, chan->channel, chan->channelFlags);
                FAIL(HAL_EINVAL);
        }
        if ((IS(chan, CHANNEL_OFDM) ^ IS(chan, CHANNEL_CCK)) == 0) {
                HALDEBUG(ah, HAL_DEBUG_ANY,
                    "%s: invalid channel %u/0x%x; not marked as OFDM or CCK\n",
                    __func__, chan->channel, chan->channelFlags);
                FAIL(HAL_EINVAL);
        }
#undef IS
        /*
         * Map public channel to private.
         */
        ichan = ath_hal_checkchannel(ah, chan);
        if (ichan == AH_NULL) {
                HALDEBUG(ah, HAL_DEBUG_ANY,
                    "%s: invalid channel %u/0x%x; no mapping\n",
                    __func__, chan->channel, chan->channelFlags);
                FAIL(HAL_EINVAL);
        }
        switch (opmode) {
        case HAL_M_STA:
        case HAL_M_IBSS:
        case HAL_M_HOSTAP:
        case HAL_M_MONITOR:
                break;
        default:
                HALDEBUG(ah, HAL_DEBUG_ANY, "%s: invalid operating mode %u\n",
                    __func__, opmode);
                FAIL(HAL_EINVAL);
                break;
        }
        HALASSERT(ahp->ah_eeversion >= AR_EEPROM_VER3);

        /* Preserve certain DMA hardware registers on a channel change */
        if (bChannelChange) {
                /*
                 * On Venice, the TSF is almost preserved across a reset;
                 * it requires the doubling writes to the RESET_TSF
                 * bit in the AR_BEACON register; it also has the quirk
                 * of the TSF going back in time on the station (station
                 * latches onto the last beacon's tsf during a reset 50%
                 * of the times); the latter is not a problem for adhoc
                 * stations since as long as the TSF is behind, it will
                 * get resynchronized on receiving the next beacon; the
                 * TSF going backwards in time could be a problem for the
                 * sleep operation (supported on infrastructure stations
                 * only) - the best and most general fix for this situation
                 * is to resynchronize the various sleep/beacon timers on
                 * the receipt of the next beacon i.e. when the TSF itself
                 * gets resynchronized to the AP's TSF - power save is
                 * needed to be temporarily disabled until that time
                 *
                 * Need to save the sequence number to restore it after
                 * the reset!
                 */
                saveFrameSeqCount = OS_REG_READ(ah, AR_D_SEQNUM);
        } else
                saveFrameSeqCount = 0;          /* NB: silence compiler */

        /* If the channel change is across the same mode - perform a fast channel change */
        if ((IS_2413(ah) || IS_5413(ah))) {
                /*
                 * Channel change can only be used when:
                 *  -channel change requested - so it's not the initial reset.
                 *  -it's not a change to the current channel - often called when switching modes
                 *   on a channel
                 *  -the modes of the previous and requested channel are the same - some ugly code for XR
                 */
                if (bChannelChange &&
                    (AH_PRIVATE(ah)->ah_curchan != AH_NULL) &&
                    (chan->channel != AH_PRIVATE(ah)->ah_curchan->channel) &&
                    ((chan->channelFlags & CHANNEL_ALL) ==
                     (AH_PRIVATE(ah)->ah_curchan->channelFlags & CHANNEL_ALL))) {
                        if (ar5212ChannelChange(ah, chan))
                                /* If ChannelChange completed - skip the rest of reset */
                                return AH_TRUE;
                }
        }

        /*
         * Preserve the antenna on a channel change
         */
        saveDefAntenna = OS_REG_READ(ah, AR_DEF_ANTENNA);
        if (saveDefAntenna == 0)                /* XXX magic constants */
                saveDefAntenna = 1;

        /* Save hardware flag before chip reset clears the register */
        macStaId1 = OS_REG_READ(ah, AR_STA_ID1) & 
                (AR_STA_ID1_BASE_RATE_11B | AR_STA_ID1_USE_DEFANT);

        /* Save led state from pci config register */
        if (!IS_5315(ah))
                saveLedState = OS_REG_READ(ah, AR5312_PCICFG) &
                        (AR_PCICFG_LEDCTL | AR_PCICFG_LEDMODE | AR_PCICFG_LEDBLINK |
                         AR_PCICFG_LEDSLOW);

        ar5312RestoreClock(ah, opmode);         /* move to refclk operation */

        /*
         * Adjust gain parameters before reset if
         * there's an outstanding gain updated.
         */
        (void) ar5212GetRfgain(ah);

        if (!ar5312ChipReset(ah, chan)) {
                HALDEBUG(ah, HAL_DEBUG_ANY, "%s: chip reset failed\n", __func__);
                FAIL(HAL_EIO);
        }

        /* Setup the indices for the next set of register array writes */
        switch (chan->channelFlags & CHANNEL_ALL) {
        case CHANNEL_A:
                modesIndex = 1;
                freqIndex  = 1;
                break;
        case CHANNEL_T:
                modesIndex = 2;
                freqIndex  = 1;
                break;
        case CHANNEL_B:
                modesIndex = 3;
                freqIndex  = 2;
                break;
        case CHANNEL_PUREG:
                modesIndex = 4;
                freqIndex  = 2;
                break;
        case CHANNEL_108G:
                modesIndex = 5;
                freqIndex  = 2;
                break;
        default:
                HALDEBUG(ah, HAL_DEBUG_ANY, "%s: invalid channel flags 0x%x\n",
                    __func__, chan->channelFlags);
                FAIL(HAL_EINVAL);
        }

        OS_MARK(ah, AH_MARK_RESET_LINE, __LINE__);

        /* Set correct Baseband to analog shift setting to access analog chips. */
        OS_REG_WRITE(ah, AR_PHY(0), 0x00000007);

        regWrites = ath_hal_ini_write(ah, &ahp->ah_ini_modes, modesIndex, 0);
        regWrites = write_common(ah, &ahp->ah_ini_common, bChannelChange,
                regWrites);
        ahp->ah_rfHal->writeRegs(ah, modesIndex, freqIndex, regWrites);

        OS_MARK(ah, AH_MARK_RESET_LINE, __LINE__);

        if (IS_CHAN_HALF_RATE(chan) || IS_CHAN_QUARTER_RATE(chan)) {
                ar5212SetIFSTiming(ah, chan);
        }

        /* Overwrite INI values for revised chipsets */
        if (AH_PRIVATE(ah)->ah_phyRev >= AR_PHY_CHIP_ID_REV_2) {
                /* ADC_CTL */
                OS_REG_WRITE(ah, AR_PHY_ADC_CTL,
                             SM(2, AR_PHY_ADC_CTL_OFF_INBUFGAIN) |
                             SM(2, AR_PHY_ADC_CTL_ON_INBUFGAIN) |
                             AR_PHY_ADC_CTL_OFF_PWDDAC |
                             AR_PHY_ADC_CTL_OFF_PWDADC);
                
                /* TX_PWR_ADJ */
                if (chan->channel == 2484) {
                        cckOfdmPwrDelta = SCALE_OC_DELTA(ee->ee_cckOfdmPwrDelta - ee->ee_scaledCh14FilterCckDelta);
                } else {
                        cckOfdmPwrDelta = SCALE_OC_DELTA(ee->ee_cckOfdmPwrDelta);
                }
                
                if (IS_CHAN_G(chan)) {
                        OS_REG_WRITE(ah, AR_PHY_TXPWRADJ,
                                     SM((ee->ee_cckOfdmPwrDelta*-1), AR_PHY_TXPWRADJ_CCK_GAIN_DELTA) |
                                     SM((cckOfdmPwrDelta*-1), AR_PHY_TXPWRADJ_CCK_PCDAC_INDEX));
                } else {
                        OS_REG_WRITE(ah, AR_PHY_TXPWRADJ, 0);
                }
                
                /* Add barker RSSI thresh enable as disabled */
                OS_REG_CLR_BIT(ah, AR_PHY_DAG_CTRLCCK,
                               AR_PHY_DAG_CTRLCCK_EN_RSSI_THR);
                OS_REG_RMW_FIELD(ah, AR_PHY_DAG_CTRLCCK,
                                 AR_PHY_DAG_CTRLCCK_RSSI_THR, 2);
                
                /* Set the mute mask to the correct default */
                OS_REG_WRITE(ah, AR_SEQ_MASK, 0x0000000F);
        }
        
        if (AH_PRIVATE(ah)->ah_phyRev >= AR_PHY_CHIP_ID_REV_3) {
                /* Clear reg to alllow RX_CLEAR line debug */
                OS_REG_WRITE(ah, AR_PHY_BLUETOOTH,  0);
        }
        if (AH_PRIVATE(ah)->ah_phyRev >= AR_PHY_CHIP_ID_REV_4) {
#ifdef notyet
                /* Enable burst prefetch for the data queues */
                OS_REG_RMW_FIELD(ah, AR_D_FPCTL, ... );
                /* Enable double-buffering */
                OS_REG_CLR_BIT(ah, AR_TXCFG, AR_TXCFG_DBL_BUF_DIS);
#endif
        }

        if (IS_5312_2_X(ah)) {
                /* ADC_CTRL */
                OS_REG_WRITE(ah, AR_PHY_SIGMA_DELTA,
                             SM(2, AR_PHY_SIGMA_DELTA_ADC_SEL) |
                             SM(4, AR_PHY_SIGMA_DELTA_FILT2) |
                             SM(0x16, AR_PHY_SIGMA_DELTA_FILT1) |
                             SM(0, AR_PHY_SIGMA_DELTA_ADC_CLIP));

                if (IS_CHAN_2GHZ(chan))
                        OS_REG_RMW_FIELD(ah, AR_PHY_RXGAIN, AR_PHY_RXGAIN_TXRX_RF_MAX, 0x0F);

                /* CCK Short parameter adjustment in 11B mode */
                if (IS_CHAN_B(chan))
                        OS_REG_RMW_FIELD(ah, AR_PHY_CCK_RXCTRL4, AR_PHY_CCK_RXCTRL4_FREQ_EST_SHORT, 12);

                /* Set ADC/DAC select values */
                OS_REG_WRITE(ah, AR_PHY_SLEEP_SCAL, 0x04);

                /* Increase 11A AGC Settling */
                if ((chan->channelFlags & CHANNEL_ALL) == CHANNEL_A)
                        OS_REG_RMW_FIELD(ah, AR_PHY_SETTLING, AR_PHY_SETTLING_AGC, 32);
        } else {
                /* Set ADC/DAC select values */
                OS_REG_WRITE(ah, AR_PHY_SLEEP_SCAL, 0x0e);
        }

        /* Setup the transmit power values. */
        if (!ar5212SetTransmitPower(ah, ichan, rfXpdGain)) {
                HALDEBUG(ah, HAL_DEBUG_ANY,
                    "%s: error init'ing transmit power\n", __func__);
                FAIL(HAL_EIO);
        }

        /* Write the analog registers */
        if (!ahp->ah_rfHal->setRfRegs(ah, ichan, modesIndex, rfXpdGain)) {
                HALDEBUG(ah, HAL_DEBUG_ANY, "%s: ar5212SetRfRegs failed\n",
                    __func__);
                FAIL(HAL_EIO);
        }

        /* Write delta slope for OFDM enabled modes (A, G, Turbo) */
        if (IS_CHAN_OFDM(chan)) {
                if ((IS_5413(ah) || (AH_PRIVATE(ah)->ah_eeversion >= AR_EEPROM_VER5_3)) &&
                    (!IS_CHAN_B(chan)))
                        ar5212SetSpurMitigation(ah, ichan);
                ar5212SetDeltaSlope(ah, chan);
        }

        /* Setup board specific options for EEPROM version 3 */
        if (!ar5212SetBoardValues(ah, ichan)) {
                HALDEBUG(ah, HAL_DEBUG_ANY,
                    "%s: error setting board options\n", __func__);
                FAIL(HAL_EIO);
        }

        /* Restore certain DMA hardware registers on a channel change */
        if (bChannelChange)
                OS_REG_WRITE(ah, AR_D_SEQNUM, saveFrameSeqCount);

        OS_MARK(ah, AH_MARK_RESET_LINE, __LINE__);

        OS_REG_WRITE(ah, AR_STA_ID0, LE_READ_4(ahp->ah_macaddr));
        OS_REG_WRITE(ah, AR_STA_ID1, LE_READ_2(ahp->ah_macaddr + 4)
                | macStaId1
                | AR_STA_ID1_RTS_USE_DEF
                | ahp->ah_staId1Defaults
        );
        ar5212SetOperatingMode(ah, opmode);

        /* Set Venice BSSID mask according to current state */
        OS_REG_WRITE(ah, AR_BSSMSKL, LE_READ_4(ahp->ah_bssidmask));
        OS_REG_WRITE(ah, AR_BSSMSKU, LE_READ_2(ahp->ah_bssidmask + 4));

        /* Restore previous led state */
        if (!IS_5315(ah))
                OS_REG_WRITE(ah, AR5312_PCICFG, OS_REG_READ(ah, AR_PCICFG) | saveLedState);

        /* Restore previous antenna */
        OS_REG_WRITE(ah, AR_DEF_ANTENNA, saveDefAntenna);

        /* then our BSSID */
        OS_REG_WRITE(ah, AR_BSS_ID0, LE_READ_4(ahp->ah_bssid));
        OS_REG_WRITE(ah, AR_BSS_ID1, LE_READ_2(ahp->ah_bssid + 4));

        /* Restore bmiss rssi & count thresholds */
        OS_REG_WRITE(ah, AR_RSSI_THR, ahp->ah_rssiThr);

        OS_REG_WRITE(ah, AR_ISR, ~0);           /* cleared on write */

        if (!ar5212SetChannel(ah, ichan))
                FAIL(HAL_EIO);

        OS_MARK(ah, AH_MARK_RESET_LINE, __LINE__);

        ar5212SetCoverageClass(ah, AH_PRIVATE(ah)->ah_coverageClass, 1);

        ar5212SetRateDurationTable(ah, chan);

        /* Set Tx frame start to tx data start delay */
        if (IS_RAD5112_ANY(ah) &&
            (IS_CHAN_HALF_RATE(AH_PRIVATE(ah)->ah_curchan) ||
             IS_CHAN_QUARTER_RATE(AH_PRIVATE(ah)->ah_curchan))) {
                txFrm2TxDStart = 
                        (IS_CHAN_HALF_RATE(AH_PRIVATE(ah)->ah_curchan)) ?
                                        TX_FRAME_D_START_HALF_RATE:
                                        TX_FRAME_D_START_QUARTER_RATE;
                OS_REG_RMW_FIELD(ah, AR_PHY_TX_CTL, 
                        AR_PHY_TX_FRAME_TO_TX_DATA_START, txFrm2TxDStart);
        }

        /*
         * Setup fast diversity.
         * Fast diversity can be enabled or disabled via regadd.txt.
         * Default is enabled.
         * For reference,
         *    Disable: reg        val
         *             0x00009860 0x00009d18 (if 11a / 11g, else no change)
         *             0x00009970 0x192bb514
         *             0x0000a208 0xd03e4648
         *
         *    Enable:  0x00009860 0x00009d10 (if 11a / 11g, else no change)
         *             0x00009970 0x192fb514
         *             0x0000a208 0xd03e6788
         */

        /* XXX Setup pre PHY ENABLE EAR additions */

        /* flush SCAL reg */
        if (IS_5312_2_X(ah)) {
                (void) OS_REG_READ(ah, AR_PHY_SLEEP_SCAL);
        }

        /*
         * Wait for the frequency synth to settle (synth goes on
         * via AR_PHY_ACTIVE_EN).  Read the phy active delay register.
         * Value is in 100ns increments.
         */
        synthDelay = OS_REG_READ(ah, AR_PHY_RX_DELAY) & AR_PHY_RX_DELAY_DELAY;
        if (IS_CHAN_CCK(chan)) {
                synthDelay = (4 * synthDelay) / 22;
        } else {
                synthDelay /= 10;
        }

        /* Activate the PHY (includes baseband activate and synthesizer on) */
        OS_REG_WRITE(ah, AR_PHY_ACTIVE, AR_PHY_ACTIVE_EN);

        /* 
         * There is an issue if the AP starts the calibration before
         * the base band timeout completes.  This could result in the
         * rx_clear false triggering.  As a workaround we add delay an
         * extra BASE_ACTIVATE_DELAY usecs to ensure this condition
         * does not happen.
         */
        if (IS_CHAN_HALF_RATE(AH_PRIVATE(ah)->ah_curchan)) {
                OS_DELAY((synthDelay << 1) + BASE_ACTIVATE_DELAY);
        } else if (IS_CHAN_QUARTER_RATE(AH_PRIVATE(ah)->ah_curchan)) {
                OS_DELAY((synthDelay << 2) + BASE_ACTIVATE_DELAY);
        } else {
                OS_DELAY(synthDelay + BASE_ACTIVATE_DELAY);
        }

        /*
         * The udelay method is not reliable with notebooks.
         * Need to check to see if the baseband is ready
         */
        testReg = OS_REG_READ(ah, AR_PHY_TESTCTRL);
        /* Selects the Tx hold */
        OS_REG_WRITE(ah, AR_PHY_TESTCTRL, AR_PHY_TESTCTRL_TXHOLD);
        i = 0;
        while ((i++ < 20) &&
               (OS_REG_READ(ah, 0x9c24) & 0x10)) /* test if baseband not ready */               OS_DELAY(200);
        OS_REG_WRITE(ah, AR_PHY_TESTCTRL, testReg);

        /* Calibrate the AGC and start a NF calculation */
        OS_REG_WRITE(ah, AR_PHY_AGC_CONTROL,
                  OS_REG_READ(ah, AR_PHY_AGC_CONTROL)
                | AR_PHY_AGC_CONTROL_CAL
                | AR_PHY_AGC_CONTROL_NF);

        if (!IS_CHAN_B(chan) && ahp->ah_bIQCalibration != IQ_CAL_DONE) {
                /* Start IQ calibration w/ 2^(INIT_IQCAL_LOG_COUNT_MAX+1) samples */
                OS_REG_RMW_FIELD(ah, AR_PHY_TIMING_CTRL4, 
                        AR_PHY_TIMING_CTRL4_IQCAL_LOG_COUNT_MAX,
                        INIT_IQCAL_LOG_COUNT_MAX);
                OS_REG_SET_BIT(ah, AR_PHY_TIMING_CTRL4,
                        AR_PHY_TIMING_CTRL4_DO_IQCAL);
                ahp->ah_bIQCalibration = IQ_CAL_RUNNING;
        } else
                ahp->ah_bIQCalibration = IQ_CAL_INACTIVE;

        /* Setup compression registers */
        ar5212SetCompRegs(ah);

        /* Set 1:1 QCU to DCU mapping for all queues */
        for (i = 0; i < AR_NUM_DCU; i++)
                OS_REG_WRITE(ah, AR_DQCUMASK(i), 1 << i);

        ahp->ah_intrTxqs = 0;
        for (i = 0; i < AH_PRIVATE(ah)->ah_caps.halTotalQueues; i++)
                ar5212ResetTxQueue(ah, i);

        /*
         * Setup interrupt handling.  Note that ar5212ResetTxQueue
         * manipulates the secondary IMR's as queues are enabled
         * and disabled.  This is done with RMW ops to insure the
         * settings we make here are preserved.
         */
        ahp->ah_maskReg = AR_IMR_TXOK | AR_IMR_TXERR | AR_IMR_TXURN
                        | AR_IMR_RXOK | AR_IMR_RXERR | AR_IMR_RXORN
                        | AR_IMR_HIUERR
                        ;
        if (opmode == HAL_M_HOSTAP)
                ahp->ah_maskReg |= AR_IMR_MIB;
        OS_REG_WRITE(ah, AR_IMR, ahp->ah_maskReg);
        /* Enable bus errors that are OR'd to set the HIUERR bit */
        OS_REG_WRITE(ah, AR_IMR_S2,
                OS_REG_READ(ah, AR_IMR_S2)
                | AR_IMR_S2_MCABT | AR_IMR_S2_SSERR | AR_IMR_S2_DPERR);

        if (AH_PRIVATE(ah)->ah_rfkillEnabled)
                ar5212EnableRfKill(ah);

        if (!ath_hal_wait(ah, AR_PHY_AGC_CONTROL, AR_PHY_AGC_CONTROL_CAL, 0)) {
                HALDEBUG(ah, HAL_DEBUG_ANY,
                    "%s: offset calibration failed to complete in 1ms;"
                    " noisy environment?\n", __func__);
        }

        /*
         * Set clocks back to 32kHz if they had been using refClk, then
         * use an external 32kHz crystal when sleeping, if one exists.
         */
        ar5312SetupClock(ah, opmode);

        /*
         * Writing to AR_BEACON will start timers. Hence it should
         * be the last register to be written. Do not reset tsf, do
         * not enable beacons at this point, but preserve other values
         * like beaconInterval.
         */
        OS_REG_WRITE(ah, AR_BEACON,
                (OS_REG_READ(ah, AR_BEACON) &~ (AR_BEACON_EN | AR_BEACON_RESET_TSF)));

        /* XXX Setup post reset EAR additions */

        /*  QoS support */
        if (AH_PRIVATE(ah)->ah_macVersion > AR_SREV_VERSION_VENICE ||
            (AH_PRIVATE(ah)->ah_macVersion == AR_SREV_VERSION_VENICE &&
             AH_PRIVATE(ah)->ah_macRev >= AR_SREV_GRIFFIN_LITE)) {
                OS_REG_WRITE(ah, AR_QOS_CONTROL, 0x100aa);      /* XXX magic */
                OS_REG_WRITE(ah, AR_QOS_SELECT, 0x3210);        /* XXX magic */
        }

        /* Turn on NOACK Support for QoS packets */
        OS_REG_WRITE(ah, AR_NOACK,
                     SM(2, AR_NOACK_2BIT_VALUE) |
                     SM(5, AR_NOACK_BIT_OFFSET) |
                     SM(0, AR_NOACK_BYTE_OFFSET));

        /* Restore user-specified settings */
        if (ahp->ah_miscMode != 0)
                OS_REG_WRITE(ah, AR_MISC_MODE, ahp->ah_miscMode);
        if (ahp->ah_slottime != (u_int) -1)
                ar5212SetSlotTime(ah, ahp->ah_slottime);
        if (ahp->ah_acktimeout != (u_int) -1)
                ar5212SetAckTimeout(ah, ahp->ah_acktimeout);
        if (ahp->ah_ctstimeout != (u_int) -1)
                ar5212SetCTSTimeout(ah, ahp->ah_ctstimeout);
        if (ahp->ah_sifstime != (u_int) -1)
                ar5212SetSifsTime(ah, ahp->ah_sifstime);
        if (AH_PRIVATE(ah)->ah_diagreg != 0)
                OS_REG_WRITE(ah, AR_DIAG_SW, AH_PRIVATE(ah)->ah_diagreg);

        AH_PRIVATE(ah)->ah_opmode = opmode;     /* record operating mode */

        if (bChannelChange) {
                if (!(ichan->privFlags & CHANNEL_DFS)) 
                        ichan->privFlags &= ~CHANNEL_INTERFERENCE;
                chan->channelFlags = ichan->channelFlags;
                chan->privFlags = ichan->privFlags;
        }

        HALDEBUG(ah, HAL_DEBUG_RESET, "%s: done\n", __func__);

        OS_MARK(ah, AH_MARK_RESET_DONE, 0);

        return AH_TRUE;
bad:
        OS_MARK(ah, AH_MARK_RESET_DONE, ecode);
        if (*status)
                *status = ecode;
        return AH_FALSE;
#undef FAIL
#undef N
}

/*
 * Places the PHY and Radio chips into reset.  A full reset
 * must be called to leave this state.  The PCI/MAC/PCU are
 * not placed into reset as we must receive interrupt to
 * re-enable the hardware.
 */
HAL_BOOL
ar5312PhyDisable(struct ath_hal *ah)
{
    return ar5312SetResetReg(ah, AR_RC_BB);
}

/*
 * Places all of hardware into reset
 */
HAL_BOOL
ar5312Disable(struct ath_hal *ah)
{
        if (!ar5312SetPowerMode(ah, HAL_PM_AWAKE, AH_TRUE))
                return AH_FALSE;
        /*
         * Reset the HW - PCI must be reset after the rest of the
         * device has been reset.
         */
        return ar5312SetResetReg(ah, AR_RC_MAC | AR_RC_BB);
}

/*
 * Places the hardware into reset and then pulls it out of reset
 *
 * TODO: Only write the PLL if we're changing to or from CCK mode
 * 
 * WARNING: The order of the PLL and mode registers must be correct.
 */
HAL_BOOL
ar5312ChipReset(struct ath_hal *ah, HAL_CHANNEL *chan)
{

        OS_MARK(ah, AH_MARK_CHIPRESET, chan ? chan->channel : 0);

        /*
         * Reset the HW 
         */
        if (!ar5312SetResetReg(ah, AR_RC_MAC | AR_RC_BB)) {
                HALDEBUG(ah, HAL_DEBUG_ANY, "%s: ar5312SetResetReg failed\n",
                    __func__);
                return AH_FALSE;
        }

        /* Bring out of sleep mode (AGAIN) */
        if (!ar5312SetPowerMode(ah, HAL_PM_AWAKE, AH_TRUE)) {
                HALDEBUG(ah, HAL_DEBUG_ANY, "%s: ar5312SetPowerMode failed\n",
                    __func__);
                return AH_FALSE;
        }

        /* Clear warm reset register */
        if (!ar5312SetResetReg(ah, 0)) {
                HALDEBUG(ah, HAL_DEBUG_ANY, "%s: ar5312SetResetReg failed\n",
                    __func__);
                return AH_FALSE;
        }

        /*
         * Perform warm reset before the mode/PLL/turbo registers
         * are changed in order to deactivate the radio.  Mode changes
         * with an active radio can result in corrupted shifts to the
         * radio device.
         */

        /*
         * Set CCK and Turbo modes correctly.
         */
        if (chan != AH_NULL) {          /* NB: can be null during attach */
                uint32_t rfMode, phyPLL = 0, curPhyPLL, turbo;

                if (IS_RAD5112_ANY(ah)) {
                        rfMode = AR_PHY_MODE_AR5112;
                        if (!IS_5315(ah)) {
                                if (IS_CHAN_CCK(chan) || IS_CHAN_G(chan)) {
                                        phyPLL = AR_PHY_PLL_CTL_44_5312;
                                } else {
                                        if (IS_CHAN_HALF_RATE(chan)) {
                                                phyPLL = AR_PHY_PLL_CTL_40_5312_HALF;
                                        } else if (IS_CHAN_QUARTER_RATE(chan)) {
                                                phyPLL = AR_PHY_PLL_CTL_40_5312_QUARTER;
                                        } else {
                                                phyPLL = AR_PHY_PLL_CTL_40_5312;
                                        }
                                }
                        } else {
                                if (IS_CHAN_CCK(chan) || IS_CHAN_G(chan))
                                        phyPLL = AR_PHY_PLL_CTL_44_5112;
                                else
                                        phyPLL = AR_PHY_PLL_CTL_40_5112;
                                if (IS_CHAN_HALF_RATE(chan))
                                        phyPLL |= AR_PHY_PLL_CTL_HALF;
                                else if (IS_CHAN_QUARTER_RATE(chan))
                                        phyPLL |= AR_PHY_PLL_CTL_QUARTER;
                        }
                } else {
                        rfMode = AR_PHY_MODE_AR5111;
                        if (IS_CHAN_CCK(chan) || IS_CHAN_G(chan))
                                phyPLL = AR_PHY_PLL_CTL_44;
                        else
                                phyPLL = AR_PHY_PLL_CTL_40;
                        if (IS_CHAN_HALF_RATE(chan))
                                phyPLL = AR_PHY_PLL_CTL_HALF;
                        else if (IS_CHAN_QUARTER_RATE(chan))
                                phyPLL = AR_PHY_PLL_CTL_QUARTER;
                }
                if (IS_CHAN_OFDM(chan) && (IS_CHAN_CCK(chan) || 
                                           IS_CHAN_G(chan)))
                        rfMode |= AR_PHY_MODE_DYNAMIC;
                else if (IS_CHAN_OFDM(chan))
                        rfMode |= AR_PHY_MODE_OFDM;
                else
                        rfMode |= AR_PHY_MODE_CCK;
                if (IS_CHAN_5GHZ(chan))
                        rfMode |= AR_PHY_MODE_RF5GHZ;
                else
                        rfMode |= AR_PHY_MODE_RF2GHZ;
                turbo = IS_CHAN_TURBO(chan) ?
                        (AR_PHY_FC_TURBO_MODE | AR_PHY_FC_TURBO_SHORT) : 0;
                curPhyPLL = OS_REG_READ(ah, AR_PHY_PLL_CTL);
                /*
                 * PLL, Mode, and Turbo values must be written in the correct
                 * order to ensure:
                 * - The PLL cannot be set to 44 unless the CCK or DYNAMIC
                 *   mode bit is set
                 * - Turbo cannot be set at the same time as CCK or DYNAMIC
                 */
                if (IS_CHAN_CCK(chan) || IS_CHAN_G(chan)) {
                        OS_REG_WRITE(ah, AR_PHY_TURBO, turbo);
                        OS_REG_WRITE(ah, AR_PHY_MODE, rfMode);
                        if (curPhyPLL != phyPLL) {
                                OS_REG_WRITE(ah,  AR_PHY_PLL_CTL,  phyPLL);
                                /* Wait for the PLL to settle */
                                OS_DELAY(PLL_SETTLE_DELAY);
                        }
                } else {
                        if (curPhyPLL != phyPLL) {
                                OS_REG_WRITE(ah,  AR_PHY_PLL_CTL,  phyPLL);
                                /* Wait for the PLL to settle */
                                OS_DELAY(PLL_SETTLE_DELAY);
                        }
                        OS_REG_WRITE(ah, AR_PHY_TURBO, turbo);
                        OS_REG_WRITE(ah, AR_PHY_MODE, rfMode);
                }
        }
        return AH_TRUE;
}

/*
 * Write the given reset bit mask into the reset register
 */
static HAL_BOOL
ar5312SetResetReg(struct ath_hal *ah, uint32_t resetMask)
{
        uint32_t mask = resetMask ? resetMask : ~0;
        HAL_BOOL rt;

        if ((rt = ar5312MacReset(ah, mask)) == AH_FALSE) {
                return rt;
        }
        if ((resetMask & AR_RC_MAC) == 0) {
                if (isBigEndian()) {
                        /*
                         * Set CFG, little-endian for register
                         * and descriptor accesses.
                         */
#ifdef AH_NEED_DESC_SWAP
                        mask = INIT_CONFIG_STATUS | AR_CFG_SWRD;
#else
                        mask = INIT_CONFIG_STATUS |
                                AR_CFG_SWTD | AR_CFG_SWRD;
#endif
                        OS_REG_WRITE(ah, AR_CFG, mask);
                } else
                        OS_REG_WRITE(ah, AR_CFG, INIT_CONFIG_STATUS);
        }
        return rt;
}

/*
 * ar5312MacReset resets (and then un-resets) the specified
 * wireless components.
 * Note: The RCMask cannot be zero on entering from ar5312SetResetReg.
 */

HAL_BOOL
ar5312MacReset(struct ath_hal *ah, unsigned int RCMask)
{
        int wlanNum = AR5312_UNIT(ah);
        uint32_t resetBB, resetBits, regMask;
        uint32_t reg;

        if (RCMask == 0)
                return(AH_FALSE);
#if ( AH_SUPPORT_2316 || AH_SUPPORT_2317 )
            if (IS_5315(ah)) {
                        switch(wlanNum) {
                        case 0:
                                resetBB = AR5315_RC_BB0_CRES | AR5315_RC_WBB0_RES; 
                                /* Warm and cold reset bits for wbb */
                                resetBits = AR5315_RC_WMAC0_RES;
                                break;
                        case 1:
                                resetBB = AR5315_RC_BB1_CRES | AR5315_RC_WBB1_RES; 
                                /* Warm and cold reset bits for wbb */
                                resetBits = AR5315_RC_WMAC1_RES;
                                break;
                        default:
                                return(AH_FALSE);
                        }               
                        regMask = ~(resetBB | resetBits);

                        /* read before */
                        reg = OS_REG_READ(ah, 
                                                          (AR5315_RSTIMER_BASE - ((uint32_t) ah->ah_sh) + AR5315_RESET));

                        if (RCMask == AR_RC_BB) {
                                /* Put baseband in reset */
                                reg |= resetBB;    /* Cold and warm reset the baseband bits */
                        } else {
                                /*
                                 * Reset the MAC and baseband.  This is a bit different than
                                 * the PCI version, but holding in reset causes problems.
                                 */
                                reg &= regMask;
                                reg |= (resetBits | resetBB) ;
                        }
                        OS_REG_WRITE(ah, 
                                                 (AR5315_RSTIMER_BASE - ((uint32_t) ah->ah_sh)+AR5315_RESET),
                                                 reg);
                        /* read after */
                        OS_REG_READ(ah, 
                                                (AR5315_RSTIMER_BASE - ((uint32_t) ah->ah_sh) +AR5315_RESET));
                        OS_DELAY(100);

                        /* Bring MAC and baseband out of reset */
                        reg &= regMask;
                        /* read before */
                        OS_REG_READ(ah, 
                                                (AR5315_RSTIMER_BASE- ((uint32_t) ah->ah_sh) +AR5315_RESET));
                        OS_REG_WRITE(ah, 
                                                 (AR5315_RSTIMER_BASE - ((uint32_t) ah->ah_sh)+AR5315_RESET),
                                                 reg);
                        /* read after */
                        OS_REG_READ(ah,
                                                (AR5315_RSTIMER_BASE- ((uint32_t) ah->ah_sh) +AR5315_RESET));


                } 
        else 
#endif
                {

                        switch(wlanNum) {
                        case 0:
                                resetBB = AR5312_RC_BB0_CRES | AR5312_RC_WBB0_RES;
                                /* Warm and cold reset bits for wbb */
                                resetBits = AR5312_RC_WMAC0_RES;
                                break;
                        case 1:
                                resetBB = AR5312_RC_BB1_CRES | AR5312_RC_WBB1_RES;
                                /* Warm and cold reset bits for wbb */
                                resetBits = AR5312_RC_WMAC1_RES;
                                break;
                        default:
                                return(AH_FALSE);
                        }
                        regMask = ~(resetBB | resetBits);

                        /* read before */
                        reg = OS_REG_READ(ah,
                                                          (AR5312_RSTIMER_BASE - ((uint32_t) ah->ah_sh) + AR5312_RESET));

                        if (RCMask == AR_RC_BB) {
                                /* Put baseband in reset */
                                reg |= resetBB;    /* Cold and warm reset the baseband bits */
                        } else {
                                /*
                                 * Reset the MAC and baseband.  This is a bit different than
                                 * the PCI version, but holding in reset causes problems.
                                 */
                                reg &= regMask;
                                reg |= (resetBits | resetBB) ;
                        }
                        OS_REG_WRITE(ah,
                                                 (AR5312_RSTIMER_BASE - ((uint32_t) ah->ah_sh)+AR5312_RESET),
                                                 reg);
                        /* read after */
                        OS_REG_READ(ah,
                                                (AR5312_RSTIMER_BASE - ((uint32_t) ah->ah_sh) +AR5312_RESET));
                        OS_DELAY(100);

                        /* Bring MAC and baseband out of reset */
                        reg &= regMask;
                        /* read before */
                        OS_REG_READ(ah,
                                                (AR5312_RSTIMER_BASE- ((uint32_t) ah->ah_sh) +AR5312_RESET));
                        OS_REG_WRITE(ah,
                                                 (AR5312_RSTIMER_BASE - ((uint32_t) ah->ah_sh)+AR5312_RESET),
                                                 reg);
                        /* read after */
                        OS_REG_READ(ah,
                                                (AR5312_RSTIMER_BASE- ((uint32_t) ah->ah_sh) +AR5312_RESET));
                }
        return(AH_TRUE);
}

#endif /* AH_SUPPORT_AR5312 */