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[netbsd-mini2440.git] / sys / external / isc / atheros_hal / dist / ar5211 / ar5211_misc.c

/*
 * Copyright (c) 2002-2008 Sam Leffler, Errno Consulting
 * Copyright (c) 2002-2006 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: ar5211_misc.c,v 1.1.1.1 2008/12/11 04:46:32 alc Exp $
 */
#include "opt_ah.h"

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

#include "ar5211/ar5211.h"
#include "ar5211/ar5211reg.h"
#include "ar5211/ar5211phy.h"

#include "ah_eeprom_v3.h"

#define AR_NUM_GPIO     6               /* 6 GPIO bits */
#define AR_GPIOD_MASK   0x2f            /* 6-bit mask */

void
ar5211GetMacAddress(struct ath_hal *ah, uint8_t *mac)
{
        struct ath_hal_5211 *ahp = AH5211(ah);

        OS_MEMCPY(mac, ahp->ah_macaddr, IEEE80211_ADDR_LEN);
}

HAL_BOOL
ar5211SetMacAddress(struct ath_hal *ah, const uint8_t *mac)
{
        struct ath_hal_5211 *ahp = AH5211(ah);

        OS_MEMCPY(ahp->ah_macaddr, mac, IEEE80211_ADDR_LEN);
        return AH_TRUE;
}

void
ar5211GetBssIdMask(struct ath_hal *ah, uint8_t *mask)
{
        static const uint8_t ones[IEEE80211_ADDR_LEN] =
                { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff };
        OS_MEMCPY(mask, ones, IEEE80211_ADDR_LEN);
}

HAL_BOOL
ar5211SetBssIdMask(struct ath_hal *ah, const uint8_t *mask)
{
        return AH_FALSE;
}

/*
 * Read 16 bits of data from the specified EEPROM offset.
 */
HAL_BOOL
ar5211EepromRead(struct ath_hal *ah, u_int off, uint16_t *data)
{
        OS_REG_WRITE(ah, AR_EEPROM_ADDR, off);
        OS_REG_WRITE(ah, AR_EEPROM_CMD, AR_EEPROM_CMD_READ);

        if (!ath_hal_wait(ah, AR_EEPROM_STS,
            AR_EEPROM_STS_READ_COMPLETE | AR_EEPROM_STS_READ_ERROR,
            AR_EEPROM_STS_READ_COMPLETE)) {
                HALDEBUG(ah, HAL_DEBUG_ANY,
                    "%s: read failed for entry 0x%x\n", __func__, off);
                return AH_FALSE;
        }
        *data = OS_REG_READ(ah, AR_EEPROM_DATA) & 0xffff;
        return AH_TRUE;
}

#ifdef AH_SUPPORT_WRITE_EEPROM
/*
 * Write 16 bits of data to the specified EEPROM offset.
 */
HAL_BOOL
ar5211EepromWrite(struct ath_hal *ah, u_int off, uint16_t data)
{
        return AH_FALSE;
}
#endif /* AH_SUPPORT_WRITE_EEPROM */

/*
 * Attempt to change the cards operating regulatory domain to the given value
 */
HAL_BOOL
ar5211SetRegulatoryDomain(struct ath_hal *ah,
        uint16_t regDomain, HAL_STATUS *status)
{
        HAL_STATUS ecode;

        if (AH_PRIVATE(ah)->ah_currentRD == regDomain) {
                ecode = HAL_EINVAL;
                goto bad;
        }
        /*
         * Check if EEPROM is configured to allow this; must
         * be a proper version and the protection bits must
         * permit re-writing that segment of the EEPROM.
         */
        if (ath_hal_eepromGetFlag(ah, AR_EEP_WRITEPROTECT)) {
                ecode = HAL_EEWRITE;
                goto bad;
        }
#ifdef AH_SUPPORT_WRITE_REGDOMAIN
        if (ar5211EepromWrite(ah, AR_EEPROM_REG_DOMAIN, regDomain)) {
                HALDEBUG(ah, HAL_DEBUG_ANY,
                    "%s: set regulatory domain to %u (0x%x)\n",
                    __func__, regDomain, regDomain);
                AH_PRIVATE(ah)->ah_currentRD = regDomain;
                return AH_TRUE;
        }
#endif
        ecode = HAL_EIO;
bad:
        if (status)
                *status = ecode;
        return AH_FALSE;
}

/*
 * Return the wireless modes (a,b,g,t) supported by hardware.
 *
 * This value is what is actually supported by the hardware
 * and is unaffected by regulatory/country code settings.
 *
 */
u_int
ar5211GetWirelessModes(struct ath_hal *ah)
{
        u_int mode = 0;

        if (ath_hal_eepromGetFlag(ah, AR_EEP_AMODE)) {
                mode = HAL_MODE_11A;
                if (!ath_hal_eepromGetFlag(ah, AR_EEP_TURBO5DISABLE))
                        mode |= HAL_MODE_TURBO | HAL_MODE_108A;
        }
        if (ath_hal_eepromGetFlag(ah, AR_EEP_BMODE))
                mode |= HAL_MODE_11B;
        return mode;
}

#if 0
HAL_BOOL
ar5211GetTurboDisable(struct ath_hal *ah)
{
        return (AH5211(ah)->ah_turboDisable != 0);
}
#endif

/*
 * Called if RfKill is supported (according to EEPROM).  Set the interrupt and
 * GPIO values so the ISR and can disable RF on a switch signal
 */
void
ar5211EnableRfKill(struct ath_hal *ah)
{
        uint16_t rfsilent = AH_PRIVATE(ah)->ah_rfsilent;
        int select = MS(rfsilent, AR_EEPROM_RFSILENT_GPIO_SEL);
        int polarity = MS(rfsilent, AR_EEPROM_RFSILENT_POLARITY);

        /*
         * Configure the desired GPIO port for input
         * and enable baseband rf silence.
         */
        ar5211GpioCfgInput(ah, select);
        OS_REG_SET_BIT(ah, AR_PHY_BASE, 0x00002000);
        /*
         * If radio disable switch connection to GPIO bit x is enabled
         * program GPIO interrupt.
         * If rfkill bit on eeprom is 1, setupeeprommap routine has already
         * verified that it is a later version of eeprom, it has a place for
         * rfkill bit and it is set to 1, indicating that GPIO bit x hardware
         * connection is present.
         */
        ar5211GpioSetIntr(ah, select, (ar5211GpioGet(ah, select) != polarity));
}

/*
 * Configure GPIO Output lines
 */
HAL_BOOL
ar5211GpioCfgOutput(struct ath_hal *ah, uint32_t gpio)
{
        uint32_t reg;

        HALASSERT(gpio < AR_NUM_GPIO);

        reg =  OS_REG_READ(ah, AR_GPIOCR);
        reg &= ~(AR_GPIOCR_0_CR_A << (gpio * AR_GPIOCR_CR_SHIFT));
        reg |= AR_GPIOCR_0_CR_A << (gpio * AR_GPIOCR_CR_SHIFT);

        OS_REG_WRITE(ah, AR_GPIOCR, reg);
        return AH_TRUE;
}

/*
 * Configure GPIO Input lines
 */
HAL_BOOL
ar5211GpioCfgInput(struct ath_hal *ah, uint32_t gpio)
{
        uint32_t reg;

        HALASSERT(gpio < AR_NUM_GPIO);

        reg =  OS_REG_READ(ah, AR_GPIOCR);
        reg &= ~(AR_GPIOCR_0_CR_A << (gpio * AR_GPIOCR_CR_SHIFT));
        reg |= AR_GPIOCR_0_CR_N << (gpio * AR_GPIOCR_CR_SHIFT);

        OS_REG_WRITE(ah, AR_GPIOCR, reg);
        return AH_TRUE;
}

/*
 * Once configured for I/O - set output lines
 */
HAL_BOOL
ar5211GpioSet(struct ath_hal *ah, uint32_t gpio, uint32_t val)
{
        uint32_t reg;

        HALASSERT(gpio < AR_NUM_GPIO);

        reg =  OS_REG_READ(ah, AR_GPIODO);
        reg &= ~(1 << gpio);
        reg |= (val&1) << gpio;

        OS_REG_WRITE(ah, AR_GPIODO, reg);
        return AH_TRUE;
}

/*
 * Once configured for I/O - get input lines
 */
uint32_t
ar5211GpioGet(struct ath_hal *ah, uint32_t gpio)
{
        if (gpio < AR_NUM_GPIO) {
                uint32_t val = OS_REG_READ(ah, AR_GPIODI);
                val = ((val & AR_GPIOD_MASK) >> gpio) & 0x1;
                return val;
        } else  {
                return 0xffffffff;
        }
}

/*
 * Set the GPIO 0 Interrupt (gpio is ignored)
 */
void
ar5211GpioSetIntr(struct ath_hal *ah, u_int gpio, uint32_t ilevel)
{
        uint32_t val = OS_REG_READ(ah, AR_GPIOCR);

        /* Clear the bits that we will modify. */
        val &= ~(AR_GPIOCR_INT_SEL0 | AR_GPIOCR_INT_SELH | AR_GPIOCR_INT_ENA |
                        AR_GPIOCR_0_CR_A);

        val |= AR_GPIOCR_INT_SEL0 | AR_GPIOCR_INT_ENA;
        if (ilevel)
                val |= AR_GPIOCR_INT_SELH;

        /* Don't need to change anything for low level interrupt. */
        OS_REG_WRITE(ah, AR_GPIOCR, val);

        /* Change the interrupt mask. */
        ar5211SetInterrupts(ah, AH5211(ah)->ah_maskReg | HAL_INT_GPIO);
}

/*
 * Change the LED blinking pattern to correspond to the connectivity
 */
void
ar5211SetLedState(struct ath_hal *ah, HAL_LED_STATE state)
{
        static const uint32_t ledbits[8] = {
                AR_PCICFG_LEDCTL_NONE|AR_PCICFG_LEDMODE_PROP, /* HAL_LED_INIT */
                AR_PCICFG_LEDCTL_PEND|AR_PCICFG_LEDMODE_PROP, /* HAL_LED_SCAN */
                AR_PCICFG_LEDCTL_PEND|AR_PCICFG_LEDMODE_PROP, /* HAL_LED_AUTH */
                AR_PCICFG_LEDCTL_ASSOC|AR_PCICFG_LEDMODE_PROP,/* HAL_LED_ASSOC*/
                AR_PCICFG_LEDCTL_ASSOC|AR_PCICFG_LEDMODE_PROP,/* HAL_LED_RUN */
                AR_PCICFG_LEDCTL_NONE|AR_PCICFG_LEDMODE_RAND,
                AR_PCICFG_LEDCTL_NONE|AR_PCICFG_LEDMODE_RAND,
                AR_PCICFG_LEDCTL_NONE|AR_PCICFG_LEDMODE_RAND,
        };
        OS_REG_WRITE(ah, AR_PCICFG,
                (OS_REG_READ(ah, AR_PCICFG) &~
                        (AR_PCICFG_LEDCTL | AR_PCICFG_LEDMODE))
                | ledbits[state & 0x7]
        );
}

/*
 * Change association related fields programmed into the hardware.
 * Writing a valid BSSID to the hardware effectively enables the hardware
 * to synchronize its TSF to the correct beacons and receive frames coming
 * from that BSSID. It is called by the SME JOIN operation.
 */
void
ar5211WriteAssocid(struct ath_hal *ah, const uint8_t *bssid, uint16_t assocId)
{
        struct ath_hal_5211 *ahp = AH5211(ah);

        /* XXX save bssid for possible re-use on reset */
        OS_MEMCPY(ahp->ah_bssid, bssid, IEEE80211_ADDR_LEN);
        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) |
                                     ((assocId & 0x3fff)<<AR_BSS_ID1_AID_S));
}

/*
 * Get the current hardware tsf for stamlme.
 */
uint64_t
ar5211GetTsf64(struct ath_hal *ah)
{
        uint32_t low1, low2, u32;

        /* sync multi-word read */
        low1 = OS_REG_READ(ah, AR_TSF_L32);
        u32 = OS_REG_READ(ah, AR_TSF_U32);
        low2 = OS_REG_READ(ah, AR_TSF_L32);
        if (low2 < low1) {      /* roll over */
                /*
                 * If we are not preempted this will work.  If we are
                 * then we re-reading AR_TSF_U32 does no good as the
                 * low bits will be meaningless.  Likewise reading
                 * L32, U32, U32, then comparing the last two reads
                 * to check for rollover doesn't help if preempted--so
                 * we take this approach as it costs one less PCI
                 * read which can be noticeable when doing things
                 * like timestamping packets in monitor mode.
                 */
                u32++;
        }
        return (((uint64_t) u32) << 32) | ((uint64_t) low2);
}

/*
 * Get the current hardware tsf for stamlme.
 */
uint32_t
ar5211GetTsf32(struct ath_hal *ah)
{
        return OS_REG_READ(ah, AR_TSF_L32);
}

/*
 * Reset the current hardware tsf for stamlme
 */
void
ar5211ResetTsf(struct ath_hal *ah)
{
        uint32_t val = OS_REG_READ(ah, AR_BEACON);

        OS_REG_WRITE(ah, AR_BEACON, val | AR_BEACON_RESET_TSF);
}

/*
 * Grab a semi-random value from hardware registers - may not
 * change often
 */
uint32_t
ar5211GetRandomSeed(struct ath_hal *ah)
{
        uint32_t nf;

        nf = (OS_REG_READ(ah, AR_PHY(25)) >> 19) & 0x1ff;
        if (nf & 0x100)
                nf = 0 - ((nf ^ 0x1ff) + 1);
        return (OS_REG_READ(ah, AR_TSF_U32) ^
                OS_REG_READ(ah, AR_TSF_L32) ^ nf);
}

/*
 * Detect if our card is present
 */
HAL_BOOL
ar5211DetectCardPresent(struct ath_hal *ah)
{
        uint16_t macVersion, macRev;
        uint32_t v;

        /*
         * Read the Silicon Revision register and compare that
         * to what we read at attach time.  If the same, we say
         * a card/device is present.
         */
        v = OS_REG_READ(ah, AR_SREV) & AR_SREV_ID_M;
        macVersion = v >> AR_SREV_ID_S;
        macRev = v & AR_SREV_REVISION_M;
        return (AH_PRIVATE(ah)->ah_macVersion == macVersion &&
                AH_PRIVATE(ah)->ah_macRev == macRev);
}

/*
 * Update MIB Counters
 */
void
ar5211UpdateMibCounters(struct ath_hal *ah, HAL_MIB_STATS *stats)
{
        stats->ackrcv_bad += OS_REG_READ(ah, AR_ACK_FAIL);
        stats->rts_bad    += OS_REG_READ(ah, AR_RTS_FAIL);
        stats->fcs_bad    += OS_REG_READ(ah, AR_FCS_FAIL);
        stats->rts_good   += OS_REG_READ(ah, AR_RTS_OK);
        stats->beacons    += OS_REG_READ(ah, AR_BEACON_CNT);
}

HAL_BOOL
ar5211SetSifsTime(struct ath_hal *ah, u_int us)
{
        struct ath_hal_5211 *ahp = AH5211(ah);

        if (us > ath_hal_mac_usec(ah, 0xffff)) {
                HALDEBUG(ah, HAL_DEBUG_ANY, "%s: bad SIFS time %u\n",
                    __func__, us);
                ahp->ah_sifstime = (u_int) -1;  /* restore default handling */
                return AH_FALSE;
        } else {
                /* convert to system clocks */
                OS_REG_WRITE(ah, AR_D_GBL_IFS_SIFS, ath_hal_mac_clks(ah, us));
                ahp->ah_slottime = us;
                return AH_TRUE;
        }
}

u_int
ar5211GetSifsTime(struct ath_hal *ah)
{
        u_int clks = OS_REG_READ(ah, AR_D_GBL_IFS_SIFS) & 0xffff;
        return ath_hal_mac_usec(ah, clks);      /* convert from system clocks */
}

HAL_BOOL
ar5211SetSlotTime(struct ath_hal *ah, u_int us)
{
        struct ath_hal_5211 *ahp = AH5211(ah);

        if (us < HAL_SLOT_TIME_9 || us > ath_hal_mac_usec(ah, 0xffff)) {
                HALDEBUG(ah, HAL_DEBUG_ANY, "%s: bad slot time %u\n",
                    __func__, us);
                ahp->ah_slottime = us;  /* restore default handling */
                return AH_FALSE;
        } else {
                /* convert to system clocks */
                OS_REG_WRITE(ah, AR_D_GBL_IFS_SLOT, ath_hal_mac_clks(ah, us));
                ahp->ah_slottime = us;
                return AH_TRUE;
        }
}

u_int
ar5211GetSlotTime(struct ath_hal *ah)
{
        u_int clks = OS_REG_READ(ah, AR_D_GBL_IFS_SLOT) & 0xffff;
        return ath_hal_mac_usec(ah, clks);      /* convert from system clocks */
}

HAL_BOOL
ar5211SetAckTimeout(struct ath_hal *ah, u_int us)
{
        struct ath_hal_5211 *ahp = AH5211(ah);

        if (us > ath_hal_mac_usec(ah, MS(0xffffffff, AR_TIME_OUT_ACK))) {
                HALDEBUG(ah, HAL_DEBUG_ANY, "%s: bad ack timeout %u\n",
                    __func__, us);
                ahp->ah_acktimeout = (u_int) -1; /* restore default handling */
                return AH_FALSE;
        } else {
                /* convert to system clocks */
                OS_REG_RMW_FIELD(ah, AR_TIME_OUT,
                        AR_TIME_OUT_ACK, ath_hal_mac_clks(ah, us));
                ahp->ah_acktimeout = us;
                return AH_TRUE;
        }
}

u_int
ar5211GetAckTimeout(struct ath_hal *ah)
{
        u_int clks = MS(OS_REG_READ(ah, AR_TIME_OUT), AR_TIME_OUT_ACK);
        return ath_hal_mac_usec(ah, clks);      /* convert from system clocks */
}

u_int
ar5211GetAckCTSRate(struct ath_hal *ah)
{
        return ((AH5211(ah)->ah_staId1Defaults & AR_STA_ID1_ACKCTS_6MB) == 0);
}

HAL_BOOL
ar5211SetAckCTSRate(struct ath_hal *ah, u_int high)
{
        struct ath_hal_5211 *ahp = AH5211(ah);

        if (high) {
                OS_REG_CLR_BIT(ah, AR_STA_ID1, AR_STA_ID1_ACKCTS_6MB);
                ahp->ah_staId1Defaults &= ~AR_STA_ID1_ACKCTS_6MB;
        } else {
                OS_REG_SET_BIT(ah, AR_STA_ID1, AR_STA_ID1_ACKCTS_6MB);
                ahp->ah_staId1Defaults |= AR_STA_ID1_ACKCTS_6MB;
        }
        return AH_TRUE;
}

HAL_BOOL
ar5211SetCTSTimeout(struct ath_hal *ah, u_int us)
{
        struct ath_hal_5211 *ahp = AH5211(ah);

        if (us > ath_hal_mac_usec(ah, MS(0xffffffff, AR_TIME_OUT_CTS))) {
                HALDEBUG(ah, HAL_DEBUG_ANY, "%s: bad cts timeout %u\n",
                    __func__, us);
                ahp->ah_ctstimeout = (u_int) -1; /* restore default handling */
                return AH_FALSE;
        } else {
                /* convert to system clocks */
                OS_REG_RMW_FIELD(ah, AR_TIME_OUT,
                        AR_TIME_OUT_CTS, ath_hal_mac_clks(ah, us));
                ahp->ah_ctstimeout = us;
                return AH_TRUE;
        }
}

u_int
ar5211GetCTSTimeout(struct ath_hal *ah)
{
        u_int clks = MS(OS_REG_READ(ah, AR_TIME_OUT), AR_TIME_OUT_CTS);
        return ath_hal_mac_usec(ah, clks);      /* convert from system clocks */
}

HAL_BOOL
ar5211SetDecompMask(struct ath_hal *ah, uint16_t keyidx, int en)
{
        /* nothing to do */
        return AH_TRUE;
}

void
ar5211SetCoverageClass(struct ath_hal *ah, uint8_t coverageclass, int now)
{
}

/*
 * Control Adaptive Noise Immunity Parameters
 */
HAL_BOOL
ar5211AniControl(struct ath_hal *ah, HAL_ANI_CMD cmd, int param)
{
        return AH_FALSE;
}

void
ar5211AniPoll(struct ath_hal *ah, const HAL_NODE_STATS *stats, HAL_CHANNEL *chan)
{
}

void
ar5211MibEvent(struct ath_hal *ah, const HAL_NODE_STATS *stats)
{
}

/*
 * Get the rssi of frame curently being received.
 */
uint32_t
ar5211GetCurRssi(struct ath_hal *ah)
{
        return (OS_REG_READ(ah, AR_PHY_CURRENT_RSSI) & 0xff);
}

u_int
ar5211GetDefAntenna(struct ath_hal *ah)
{   
        return (OS_REG_READ(ah, AR_DEF_ANTENNA) & 0x7);
}   

void
ar5211SetDefAntenna(struct ath_hal *ah, u_int antenna)
{
        OS_REG_WRITE(ah, AR_DEF_ANTENNA, (antenna & 0x7));
}

HAL_ANT_SETTING
ar5211GetAntennaSwitch(struct ath_hal *ah)
{
        return AH5211(ah)->ah_diversityControl;
}

HAL_BOOL
ar5211SetAntennaSwitch(struct ath_hal *ah, HAL_ANT_SETTING settings)
{
        const HAL_CHANNEL *chan =
                (const HAL_CHANNEL *) AH_PRIVATE(ah)->ah_curchan;

        if (chan == AH_NULL) {
                AH5211(ah)->ah_diversityControl = settings;
                return AH_TRUE;
        }
        return ar5211SetAntennaSwitchInternal(ah, settings, chan);
}

HAL_STATUS
ar5211GetCapability(struct ath_hal *ah, HAL_CAPABILITY_TYPE type,
        uint32_t capability, uint32_t *result)
{

        switch (type) {
        case HAL_CAP_CIPHER:            /* cipher handled in hardware */
                switch (capability) {
                case HAL_CIPHER_AES_OCB:
                case HAL_CIPHER_WEP:
                case HAL_CIPHER_CLR:
                        return HAL_OK;
                default:
                        return HAL_ENOTSUPP;
                }
        default:
                return ath_hal_getcapability(ah, type, capability, result);
        }
}

HAL_BOOL
ar5211SetCapability(struct ath_hal *ah, HAL_CAPABILITY_TYPE type,
        uint32_t capability, uint32_t setting, HAL_STATUS *status)
{
        switch (type) {
        case HAL_CAP_DIAG:              /* hardware diagnostic support */
                /*
                 * NB: could split this up into virtual capabilities,
                 *     (e.g. 1 => ACK, 2 => CTS, etc.) but it hardly
                 *     seems worth the additional complexity.
                 */
#ifdef AH_DEBUG
                AH_PRIVATE(ah)->ah_diagreg = setting;
#else
                AH_PRIVATE(ah)->ah_diagreg = setting & 0x6;     /* ACK+CTS */
#endif
                OS_REG_WRITE(ah, AR_DIAG_SW, AH_PRIVATE(ah)->ah_diagreg);
                return AH_TRUE;
        default:
                return ath_hal_setcapability(ah, type, capability,
                        setting, status);
        }
}

HAL_BOOL
ar5211GetDiagState(struct ath_hal *ah, int request,
        const void *args, uint32_t argsize,
        void **result, uint32_t *resultsize)
{
        struct ath_hal_5211 *ahp = AH5211(ah);

        (void) ahp;
        if (ath_hal_getdiagstate(ah, request, args, argsize, result, resultsize))
                return AH_TRUE;
        switch (request) {
        case HAL_DIAG_EEPROM:
                return ath_hal_eepromDiag(ah, request,
                    args, argsize, result, resultsize);
        case HAL_DIAG_RFGAIN:
                *result = &ahp->ah_gainValues;
                *resultsize = sizeof(GAIN_VALUES);
                return AH_TRUE;
        case HAL_DIAG_RFGAIN_CURSTEP:
                *result = __DECONST(void *, ahp->ah_gainValues.currStep);
                *resultsize = (*result == AH_NULL) ?
                        0 : sizeof(GAIN_OPTIMIZATION_STEP);
                return AH_TRUE;
        }
        return AH_FALSE;
}