ath9k_hw.c

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/*
 * Copyright (c) 2008-2011 Atheros Communications Inc.
 *
 * Modified for iPXE by Scott K Logan <logans@cottsay.net> July 2011
 * Original from Linux kernel 3.0.1
 *
 * Permission to use, copy, modify, and/or distribute this software for any
 * purpose with or without fee is hereby granted, provided that the above
 * copyright notice and this permission notice appear in all copies.
 *
 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 */

FILE_SECBOOT ( FORBIDDEN );

#include <ipxe/vsprintf.h>
#include <ipxe/io.h>

#include "hw.h"
#include "hw-ops.h"
#include "ar9003_mac.h"

static int ath9k_hw_set_reset_reg(struct ath_hw *ah, u32 type);

/* Private hardware callbacks */

static void ath9k_hw_init_cal_settings(struct ath_hw *ah)
{
        ath9k_hw_private_ops(ah)->init_cal_settings(ah);
}

static void ath9k_hw_init_mode_regs(struct ath_hw *ah)
{
        ath9k_hw_private_ops(ah)->init_mode_regs(ah);
}

static u32 ath9k_hw_compute_pll_control(struct ath_hw *ah,
                                        struct ath9k_channel *chan)
{
        return ath9k_hw_private_ops(ah)->compute_pll_control(ah, chan);
}

static void ath9k_hw_init_mode_gain_regs(struct ath_hw *ah)
{
        if (!ath9k_hw_private_ops(ah)->init_mode_gain_regs)
                return;

        ath9k_hw_private_ops(ah)->init_mode_gain_regs(ah);
}

static void ath9k_hw_ani_cache_ini_regs(struct ath_hw *ah)
{
        /* You will not have this callback if using the old ANI */
        if (!ath9k_hw_private_ops(ah)->ani_cache_ini_regs)
                return;

        ath9k_hw_private_ops(ah)->ani_cache_ini_regs(ah);
}

/********************/
/* Helper Functions */
/********************/

static void ath9k_hw_set_clockrate(struct ath_hw *ah)
{
        struct ath_common *common = ath9k_hw_common(ah);
        struct net80211_device *dev = common->dev;
        unsigned int clockrate;

        if (!ah->curchan) /* should really check for CCK instead */
                clockrate = ATH9K_CLOCK_RATE_CCK;
        else if ((dev->channels + dev->channel)->band == NET80211_BAND_2GHZ)
                clockrate = ATH9K_CLOCK_RATE_2GHZ_OFDM;
        else if (ah->caps.hw_caps & ATH9K_HW_CAP_FASTCLOCK)
                clockrate = ATH9K_CLOCK_FAST_RATE_5GHZ_OFDM;
        else
                clockrate = ATH9K_CLOCK_RATE_5GHZ_OFDM;

        common->clockrate = clockrate;
}

static u32 ath9k_hw_mac_to_clks(struct ath_hw *ah, u32 usecs)
{
        struct ath_common *common = ath9k_hw_common(ah);

        return usecs * common->clockrate;
}

int ath9k_hw_wait(struct ath_hw *ah, u32 reg, u32 mask, u32 val, u32 timeout)
{
        unsigned int i;

        for (i = 0; i < (timeout / AH_TIME_QUANTUM); i++) {
                if ((REG_READ(ah, reg) & mask) == val)
                        return 1;

                udelay(AH_TIME_QUANTUM);
        }

        DBG("ath9k: "
                "timeout (%d us) on reg 0x%x: 0x%08x & 0x%08x != 0x%08x\n",
                timeout, reg, REG_READ(ah, reg), mask, val);

        return 0;
}

void ath9k_hw_write_array(struct ath_hw *ah, struct ar5416IniArray *array,
                          int column, unsigned int *writecnt)
{
        unsigned int r;

        ENABLE_REGWRITE_BUFFER(ah);
        for (r = 0; r < array->ia_rows; r++) {
                REG_WRITE(ah, INI_RA(array, r, 0),
                          INI_RA(array, r, column));
                DO_DELAY(*writecnt);
        }
        REGWRITE_BUFFER_FLUSH(ah);
}

u32 ath9k_hw_reverse_bits(u32 val, u32 n)
{
        u32 retval;
        unsigned int i;

        for (i = 0, retval = 0; i < n; i++) {
                retval = (retval << 1) | (val & 1);
                val >>= 1;
        }
        return retval;
}

u16 ath9k_hw_computetxtime(struct ath_hw *ah,
                           u8 phy, int kbps,
                           u32 frameLen, u16 rateix,
                           int shortPreamble)
{
        u32 bitsPerSymbol, numBits, numSymbols, phyTime, txTime;

        if (kbps == 0)
                return 0;

        switch (phy) {
        case CHANNEL_CCK:
                phyTime = CCK_PREAMBLE_BITS + CCK_PLCP_BITS;
                if (shortPreamble)
                        phyTime >>= 1;
                numBits = frameLen << 3;
                txTime = CCK_SIFS_TIME + phyTime + ((numBits * 1000) / kbps);
                break;
        case CHANNEL_OFDM:
                if (ah->curchan && IS_CHAN_QUARTER_RATE(ah->curchan)) {
                        bitsPerSymbol = (kbps * OFDM_SYMBOL_TIME_QUARTER) / 1000;
                        numBits = OFDM_PLCP_BITS + (frameLen << 3);
                        numSymbols = DIV_ROUND_UP(numBits, bitsPerSymbol);
                        txTime = OFDM_SIFS_TIME_QUARTER
                                + OFDM_PREAMBLE_TIME_QUARTER
                                + (numSymbols * OFDM_SYMBOL_TIME_QUARTER);
                } else if (ah->curchan &&
                           IS_CHAN_HALF_RATE(ah->curchan)) {
                        bitsPerSymbol = (kbps * OFDM_SYMBOL_TIME_HALF) / 1000;
                        numBits = OFDM_PLCP_BITS + (frameLen << 3);
                        numSymbols = DIV_ROUND_UP(numBits, bitsPerSymbol);
                        txTime = OFDM_SIFS_TIME_HALF +
                                OFDM_PREAMBLE_TIME_HALF
                                + (numSymbols * OFDM_SYMBOL_TIME_HALF);
                } else {
                        bitsPerSymbol = (kbps * OFDM_SYMBOL_TIME) / 1000;
                        numBits = OFDM_PLCP_BITS + (frameLen << 3);
                        numSymbols = DIV_ROUND_UP(numBits, bitsPerSymbol);
                        txTime = OFDM_SIFS_TIME + OFDM_PREAMBLE_TIME
                                + (numSymbols * OFDM_SYMBOL_TIME);
                }
                break;
        default:
                DBG("ath9k: "
                        "Unknown phy %d (rate ix %d)\n", phy, rateix);
                txTime = 0;
                break;
        }

        return txTime;
}

void ath9k_hw_get_channel_centers(struct ath_hw *ah __unused,
                                  struct ath9k_channel *chan,
                                  struct chan_centers *centers)
{
        int8_t extoff;

        if (!IS_CHAN_HT40(chan)) {
                centers->ctl_center = centers->ext_center =
                        centers->synth_center = chan->channel;
                return;
        }

        if ((chan->chanmode == CHANNEL_A_HT40PLUS) ||
            (chan->chanmode == CHANNEL_G_HT40PLUS)) {
                centers->synth_center =
                        chan->channel + HT40_CHANNEL_CENTER_SHIFT;
                extoff = 1;
        } else {
                centers->synth_center =
                        chan->channel - HT40_CHANNEL_CENTER_SHIFT;
                extoff = -1;
        }

        centers->ctl_center =
                centers->synth_center - (extoff * HT40_CHANNEL_CENTER_SHIFT);
        /* 25 MHz spacing is supported by hw but not on upper layers */
        centers->ext_center =
                centers->synth_center + (extoff * HT40_CHANNEL_CENTER_SHIFT);
}

/******************/
/* Chip Revisions */
/******************/

static void ath9k_hw_read_revisions(struct ath_hw *ah)
{
        u32 val;

        switch (ah->hw_version.devid) {
        case AR5416_AR9100_DEVID:
                ah->hw_version.macVersion = AR_SREV_VERSION_9100;
                break;
        case AR9300_DEVID_AR9340:
                ah->hw_version.macVersion = AR_SREV_VERSION_9340;
                val = REG_READ(ah, AR_SREV);
                ah->hw_version.macRev = MS(val, AR_SREV_REVISION2);
                return;
        }

        val = REG_READ(ah, AR_SREV) & AR_SREV_ID;

        if (val == 0xFF) {
                val = REG_READ(ah, AR_SREV);
                ah->hw_version.macVersion =
                        (val & AR_SREV_VERSION2) >> AR_SREV_TYPE2_S;
                ah->hw_version.macRev = MS(val, AR_SREV_REVISION2);
                ah->is_pciexpress = (val & AR_SREV_TYPE2_HOST_MODE) ? 0 : 1;
        } else {
                if (!AR_SREV_9100(ah))
                        ah->hw_version.macVersion = MS(val, AR_SREV_VERSION);

                ah->hw_version.macRev = val & AR_SREV_REVISION;

                if (ah->hw_version.macVersion == AR_SREV_VERSION_5416_PCIE)
                        ah->is_pciexpress = 1;
        }
}

/************************************/
/* HW Attach, Detach, Init Routines */
/************************************/

static void ath9k_hw_disablepcie(struct ath_hw *ah)
{
        if (!AR_SREV_5416(ah))
                return;

        REG_WRITE(ah, AR_PCIE_SERDES, 0x9248fc00);
        REG_WRITE(ah, AR_PCIE_SERDES, 0x24924924);
        REG_WRITE(ah, AR_PCIE_SERDES, 0x28000029);
        REG_WRITE(ah, AR_PCIE_SERDES, 0x57160824);
        REG_WRITE(ah, AR_PCIE_SERDES, 0x25980579);
        REG_WRITE(ah, AR_PCIE_SERDES, 0x00000000);
        REG_WRITE(ah, AR_PCIE_SERDES, 0x1aaabe40);
        REG_WRITE(ah, AR_PCIE_SERDES, 0xbe105554);
        REG_WRITE(ah, AR_PCIE_SERDES, 0x000e1007);

        REG_WRITE(ah, AR_PCIE_SERDES2, 0x00000000);
}

/* This should work for all families including legacy */
static int ath9k_hw_chip_test(struct ath_hw *ah)
{
        u32 regAddr[2] = { AR_STA_ID0 };
        u32 regHold[2];
        static const u32 patternData[4] = {
                0x55555555, 0xaaaaaaaa, 0x66666666, 0x99999999
        };
        int i, j, loop_max;

        if (!AR_SREV_9300_20_OR_LATER(ah)) {
                loop_max = 2;
                regAddr[1] = AR_PHY_BASE + (8 << 2);
        } else
                loop_max = 1;

        for (i = 0; i < loop_max; i++) {
                u32 addr = regAddr[i];
                u32 wrData, rdData;

                regHold[i] = REG_READ(ah, addr);
                for (j = 0; j < 0x100; j++) {
                        wrData = (j << 16) | j;
                        REG_WRITE(ah, addr, wrData);
                        rdData = REG_READ(ah, addr);
                        if (rdData != wrData) {
                                DBG("ath9k: "
                                        "address test failed addr: 0x%08x - wr:0x%08x != rd:0x%08x\n",
                                        addr, wrData, rdData);
                                return 0;
                        }
                }
                for (j = 0; j < 4; j++) {
                        wrData = patternData[j];
                        REG_WRITE(ah, addr, wrData);
                        rdData = REG_READ(ah, addr);
                        if (wrData != rdData) {
                                DBG("ath9k: "
                                        "address test failed addr: 0x%08x - wr:0x%08x != rd:0x%08x\n",
                                        addr, wrData, rdData);
                                return 0;
                        }
                }
                REG_WRITE(ah, regAddr[i], regHold[i]);
        }
        udelay(100);

        return 1;
}

static void ath9k_hw_init_config(struct ath_hw *ah)
{
        int i;

        ah->config.dma_beacon_response_time = 2;
        ah->config.sw_beacon_response_time = 10;
        ah->config.additional_swba_backoff = 0;
        ah->config.ack_6mb = 0x0;
        ah->config.cwm_ignore_extcca = 0;
        ah->config.pcie_powersave_enable = 0;
        ah->config.pcie_clock_req = 0;
        ah->config.pcie_waen = 0;
        ah->config.analog_shiftreg = 1;
        ah->config.enable_ani = 1;

        for (i = 0; i < AR_EEPROM_MODAL_SPURS; i++) {
                ah->config.spurchans[i][0] = AR_NO_SPUR;
                ah->config.spurchans[i][1] = AR_NO_SPUR;
        }

        /* PAPRD needs some more work to be enabled */
        ah->config.paprd_disable = 1;

        ah->config.rx_intr_mitigation = 1;
        ah->config.pcieSerDesWrite = 1;
}

static void ath9k_hw_init_defaults(struct ath_hw *ah)
{
        struct ath_regulatory *regulatory = ath9k_hw_regulatory(ah);

        regulatory->country_code = CTRY_DEFAULT;
        regulatory->power_limit = MAX_RATE_POWER;
        regulatory->tp_scale = ATH9K_TP_SCALE_MAX;

        ah->hw_version.magic = AR5416_MAGIC;
        ah->hw_version.subvendorid = 0;

        ah->atim_window = 0;
        ah->sta_id1_defaults =
                AR_STA_ID1_CRPT_MIC_ENABLE |
                AR_STA_ID1_MCAST_KSRCH;
        if (AR_SREV_9100(ah))
                ah->sta_id1_defaults |= AR_STA_ID1_AR9100_BA_FIX;
        ah->enable_32kHz_clock = DONT_USE_32KHZ;
        ah->slottime = 20;
        ah->globaltxtimeout = (u32) -1;
        ah->power_mode = ATH9K_PM_UNDEFINED;
}

static int ath9k_hw_init_macaddr(struct ath_hw *ah)
{
        struct ath_common *common = ath9k_hw_common(ah);
        u32 sum;
        int i;
        u16 eeval;
        static const u32 EEP_MAC[] = { EEP_MAC_LSW, EEP_MAC_MID, EEP_MAC_MSW };

        sum = 0;
        for (i = 0; i < 3; i++) {
                eeval = ah->eep_ops->get_eeprom(ah, EEP_MAC[i]);
                sum += eeval;
                common->macaddr[2 * i] = eeval >> 8;
                common->macaddr[2 * i + 1] = eeval & 0xff;
        }
        if (sum == 0 || sum == 0xffff * 3)
                return -EADDRNOTAVAIL;

        return 0;
}

static int ath9k_hw_post_init(struct ath_hw *ah)
{
        struct ath_common *common = ath9k_hw_common(ah);
        int ecode;

        if (common->bus_ops->ath_bus_type != ATH_USB) {
                if (!ath9k_hw_chip_test(ah))
                        return -ENODEV;
        }

        if (!AR_SREV_9300_20_OR_LATER(ah)) {
                ecode = ar9002_hw_rf_claim(ah);
                if (ecode != 0)
                        return ecode;
        }

        ecode = ath9k_hw_eeprom_init(ah);
        if (ecode != 0)
                return ecode;

        DBG("ath9k: "
                "Eeprom VER: %d, REV: %d\n",
                ah->eep_ops->get_eeprom_ver(ah),
                ah->eep_ops->get_eeprom_rev(ah));

        ecode = ath9k_hw_rf_alloc_ext_banks(ah);
        if (ecode) {
                DBG("ath9k: "
                        "Failed allocating banks for external radio\n");
                ath9k_hw_rf_free_ext_banks(ah);
                return ecode;
        }

        if (!AR_SREV_9100(ah) && !AR_SREV_9340(ah)) {
                ath9k_hw_ani_setup(ah);
                ath9k_hw_ani_init(ah);
        }

        return 0;
}

static void ath9k_hw_attach_ops(struct ath_hw *ah)
{
        if (AR_SREV_9300_20_OR_LATER(ah))
                ar9003_hw_attach_ops(ah);
        else
                ar9002_hw_attach_ops(ah);
}

/* Called for all hardware families */
static int __ath9k_hw_init(struct ath_hw *ah)
{
        struct ath_common *common = ath9k_hw_common(ah);
        int r = 0;

        ath9k_hw_read_revisions(ah);

        /*
         * Read back AR_WA into a permanent copy and set bits 14 and 17.
         * We need to do this to avoid RMW of this register. We cannot
         * read the reg when chip is asleep.
         */
        ah->WARegVal = REG_READ(ah, AR_WA);
        ah->WARegVal |= (AR_WA_D3_L1_DISABLE |
                         AR_WA_ASPM_TIMER_BASED_DISABLE);

        if (!ath9k_hw_set_reset_reg(ah, ATH9K_RESET_POWER_ON)) {
                DBG("ath9k: Couldn't reset chip\n");
                return -EIO;
        }

        ath9k_hw_init_defaults(ah);
        ath9k_hw_init_config(ah);

        ath9k_hw_attach_ops(ah);

        if (!ath9k_hw_setpower(ah, ATH9K_PM_AWAKE)) {
                DBG("ath9k: Couldn't wakeup chip\n");
                return -EIO;
        }

        if (ah->config.serialize_regmode == SER_REG_MODE_AUTO) {
                if (ah->hw_version.macVersion == AR_SREV_VERSION_5416_PCI ||
                    ((AR_SREV_9160(ah) || AR_SREV_9280(ah)) &&
                     !ah->is_pciexpress)) {
                        ah->config.serialize_regmode =
                                SER_REG_MODE_ON;
                } else {
                        ah->config.serialize_regmode =
                                SER_REG_MODE_OFF;
                }
        }

        DBG2("ath9k: serialize_regmode is %d\n",
                ah->config.serialize_regmode);

        if (AR_SREV_9285(ah) || AR_SREV_9271(ah))
                ah->config.max_txtrig_level = MAX_TX_FIFO_THRESHOLD >> 1;
        else
                ah->config.max_txtrig_level = MAX_TX_FIFO_THRESHOLD;

        switch (ah->hw_version.macVersion) {
        case AR_SREV_VERSION_5416_PCI:
        case AR_SREV_VERSION_5416_PCIE:
        case AR_SREV_VERSION_9160:
        case AR_SREV_VERSION_9100:
        case AR_SREV_VERSION_9280:
        case AR_SREV_VERSION_9285:
        case AR_SREV_VERSION_9287:
        case AR_SREV_VERSION_9271:
        case AR_SREV_VERSION_9300:
        case AR_SREV_VERSION_9485:
        case AR_SREV_VERSION_9340:
                break;
        default:
                DBG("ath9k: "
                        "Mac Chip Rev 0x%02x.%x is not supported by this driver\n",
                        ah->hw_version.macVersion, ah->hw_version.macRev);
                return -EOPNOTSUPP;
        }

        if (AR_SREV_9271(ah) || AR_SREV_9100(ah) || AR_SREV_9340(ah))
                ah->is_pciexpress = 0;

        ah->hw_version.phyRev = REG_READ(ah, AR_PHY_CHIP_ID);
        ath9k_hw_init_cal_settings(ah);

        ah->ani_function = ATH9K_ANI_ALL;
        if (AR_SREV_9280_20_OR_LATER(ah) && !AR_SREV_9300_20_OR_LATER(ah))
                ah->ani_function &= ~ATH9K_ANI_NOISE_IMMUNITY_LEVEL;
        if (!AR_SREV_9300_20_OR_LATER(ah))
                ah->ani_function &= ~ATH9K_ANI_MRC_CCK;

        ath9k_hw_init_mode_regs(ah);


        if (ah->is_pciexpress)
                ath9k_hw_configpcipowersave(ah, 0, 0);
        else
                ath9k_hw_disablepcie(ah);

        if (!AR_SREV_9300_20_OR_LATER(ah))
                ar9002_hw_cck_chan14_spread(ah);

        r = ath9k_hw_post_init(ah);
        if (r)
                return r;

        ath9k_hw_init_mode_gain_regs(ah);
        r = ath9k_hw_fill_cap_info(ah);
        if (r)
                return r;

        r = ath9k_hw_init_macaddr(ah);
        if (r) {
                DBG("ath9k: Failed to initialize MAC address\n");
                return r;
        }

        if (AR_SREV_9285(ah) || AR_SREV_9271(ah))
                ah->tx_trig_level = (AR_FTRIG_256B >> AR_FTRIG_S);
        else
                ah->tx_trig_level = (AR_FTRIG_512B >> AR_FTRIG_S);

        common->state = ATH_HW_INITIALIZED;

        return 0;
}

int ath9k_hw_init(struct ath_hw *ah)
{
        int ret;
        struct ath_common *common = ath9k_hw_common(ah);

        /* These are all the AR5008/AR9001/AR9002 hardware family of chipsets */
        switch (ah->hw_version.devid) {
        case AR5416_DEVID_PCI:
        case AR5416_DEVID_PCIE:
        case AR5416_AR9100_DEVID:
        case AR9160_DEVID_PCI:
        case AR9280_DEVID_PCI:
        case AR9280_DEVID_PCIE:
        case AR9285_DEVID_PCIE:
        case AR9287_DEVID_PCI:
        case AR9287_DEVID_PCIE:
        case AR2427_DEVID_PCIE:
        case AR9300_DEVID_PCIE:
        case AR9300_DEVID_AR9485_PCIE:
        case AR9300_DEVID_AR9340:
                break;
        default:
                if (common->bus_ops->ath_bus_type == ATH_USB)
                        break;
                DBG("ath9k: Hardware device ID 0x%04x not supported\n",
                        ah->hw_version.devid);
                return -EOPNOTSUPP;
        }

        ret = __ath9k_hw_init(ah);
        if (ret) {
                DBG("ath9k: "
                        "Unable to initialize hardware; initialization status: %d\n",
                        ret);
                return ret;
        }

        return 0;
}

u32 ar9003_get_pll_sqsum_dvc(struct ath_hw *ah)
{
        REG_CLR_BIT(ah, PLL3, PLL3_DO_MEAS_MASK);
        udelay(100);
        REG_SET_BIT(ah, PLL3, PLL3_DO_MEAS_MASK);

        while ((REG_READ(ah, PLL4) & PLL4_MEAS_DONE) == 0)
                udelay(100);

        return (REG_READ(ah, PLL3) & SQSUM_DVC_MASK) >> 3;
}

static void ath9k_hw_init_pll(struct ath_hw *ah,
                              struct ath9k_channel *chan)
{
        u32 pll;

        if (AR_SREV_9485(ah)) {

                /* program BB PLL ki and kd value, ki=0x4, kd=0x40 */
                REG_RMW_FIELD(ah, AR_CH0_BB_DPLL2,
                              AR_CH0_BB_DPLL2_PLL_PWD, 0x1);
                REG_RMW_FIELD(ah, AR_CH0_BB_DPLL2,
                              AR_CH0_DPLL2_KD, 0x40);
                REG_RMW_FIELD(ah, AR_CH0_BB_DPLL2,
                              AR_CH0_DPLL2_KI, 0x4);

                REG_RMW_FIELD(ah, AR_CH0_BB_DPLL1,
                              AR_CH0_BB_DPLL1_REFDIV, 0x5);
                REG_RMW_FIELD(ah, AR_CH0_BB_DPLL1,
                              AR_CH0_BB_DPLL1_NINI, 0x58);
                REG_RMW_FIELD(ah, AR_CH0_BB_DPLL1,
                              AR_CH0_BB_DPLL1_NFRAC, 0x0);

                REG_RMW_FIELD(ah, AR_CH0_BB_DPLL2,
                              AR_CH0_BB_DPLL2_OUTDIV, 0x1);
                REG_RMW_FIELD(ah, AR_CH0_BB_DPLL2,
                              AR_CH0_BB_DPLL2_LOCAL_PLL, 0x1);
                REG_RMW_FIELD(ah, AR_CH0_BB_DPLL2,
                              AR_CH0_BB_DPLL2_EN_NEGTRIG, 0x1);

                /* program BB PLL phase_shift to 0x6 */
                REG_RMW_FIELD(ah, AR_CH0_BB_DPLL3,
                              AR_CH0_BB_DPLL3_PHASE_SHIFT, 0x6);

                REG_RMW_FIELD(ah, AR_CH0_BB_DPLL2,
                              AR_CH0_BB_DPLL2_PLL_PWD, 0x0);
                udelay(1000);
        } else if (AR_SREV_9340(ah)) {
                u32 regval, pll2_divint, pll2_divfrac, refdiv;

                REG_WRITE(ah, AR_RTC_PLL_CONTROL, 0x1142c);
                udelay(1000);

                REG_SET_BIT(ah, AR_PHY_PLL_MODE, 0x1 << 16);
                udelay(100);

                if (ah->is_clk_25mhz) {
                        pll2_divint = 0x54;
                        pll2_divfrac = 0x1eb85;
                        refdiv = 3;
                } else {
                        pll2_divint = 88;
                        pll2_divfrac = 0;
                        refdiv = 5;
                }

                regval = REG_READ(ah, AR_PHY_PLL_MODE);
                regval |= (0x1 << 16);
                REG_WRITE(ah, AR_PHY_PLL_MODE, regval);
                udelay(100);

                REG_WRITE(ah, AR_PHY_PLL_CONTROL, (refdiv << 27) |
                          (pll2_divint << 18) | pll2_divfrac);
                udelay(100);

                regval = REG_READ(ah, AR_PHY_PLL_MODE);
                regval = (regval & 0x80071fff) | (0x1 << 30) | (0x1 << 13) |
                         (0x4 << 26) | (0x18 << 19);
                REG_WRITE(ah, AR_PHY_PLL_MODE, regval);
                REG_WRITE(ah, AR_PHY_PLL_MODE,
                          REG_READ(ah, AR_PHY_PLL_MODE) & 0xfffeffff);
                udelay(1000);
        }

        pll = ath9k_hw_compute_pll_control(ah, chan);

        REG_WRITE(ah, AR_RTC_PLL_CONTROL, pll);

        if (AR_SREV_9485(ah) || AR_SREV_9340(ah))
                udelay(1000);

        /* Switch the core clock for ar9271 to 117Mhz */
        if (AR_SREV_9271(ah)) {
                udelay(500);
                REG_WRITE(ah, 0x50040, 0x304);
        }

        udelay(RTC_PLL_SETTLE_DELAY);

        REG_WRITE(ah, AR_RTC_SLEEP_CLK, AR_RTC_FORCE_DERIVED_CLK);

        if (AR_SREV_9340(ah)) {
                if (ah->is_clk_25mhz) {
                        REG_WRITE(ah, AR_RTC_DERIVED_CLK, 0x17c << 1);
                        REG_WRITE(ah, AR_SLP32_MODE, 0x0010f3d7);
                        REG_WRITE(ah,  AR_SLP32_INC, 0x0001e7ae);
                } else {
                        REG_WRITE(ah, AR_RTC_DERIVED_CLK, 0x261 << 1);
                        REG_WRITE(ah, AR_SLP32_MODE, 0x0010f400);
                        REG_WRITE(ah,  AR_SLP32_INC, 0x0001e800);
                }
                udelay(100);
        }
}

static void ath9k_hw_init_interrupt_masks(struct ath_hw *ah)
{
        u32 sync_default = AR_INTR_SYNC_DEFAULT;
        u32 imr_reg = AR_IMR_TXERR |
                AR_IMR_TXURN |
                AR_IMR_RXERR |
                AR_IMR_RXORN;;

        if (AR_SREV_9340(ah))
                sync_default &= ~AR_INTR_SYNC_HOST1_FATAL;

        if (AR_SREV_9300_20_OR_LATER(ah)) {
                imr_reg |= AR_IMR_RXOK_HP;
                if (ah->config.rx_intr_mitigation)
                        imr_reg |= AR_IMR_RXINTM | AR_IMR_RXMINTR;
                else
                        imr_reg |= AR_IMR_RXOK_LP;

        } else {
                if (ah->config.rx_intr_mitigation)
                        imr_reg |= AR_IMR_RXINTM | AR_IMR_RXMINTR;
                else
                        imr_reg |= AR_IMR_RXOK;
        }

        if (ah->config.tx_intr_mitigation)
                imr_reg |= AR_IMR_TXINTM | AR_IMR_TXMINTR;
        else
                imr_reg |= AR_IMR_TXOK;

        ENABLE_REGWRITE_BUFFER(ah);

        REG_WRITE(ah, AR_IMR, imr_reg);
//      ah->imrs2_reg |= AR_IMR_S2_GTT;
        REG_WRITE(ah, AR_IMR_S2, ah->imrs2_reg);

        if (!AR_SREV_9100(ah)) {
                REG_WRITE(ah, AR_INTR_SYNC_CAUSE, 0xFFFFFFFF);
                REG_WRITE(ah, AR_INTR_SYNC_ENABLE, sync_default);
                REG_WRITE(ah, AR_INTR_SYNC_MASK, 0);
        }

        REGWRITE_BUFFER_FLUSH(ah);

        if (AR_SREV_9300_20_OR_LATER(ah)) {
                REG_WRITE(ah, AR_INTR_PRIO_ASYNC_ENABLE, 0);
                REG_WRITE(ah, AR_INTR_PRIO_ASYNC_MASK, 0);
                REG_WRITE(ah, AR_INTR_PRIO_SYNC_ENABLE, 0);
                REG_WRITE(ah, AR_INTR_PRIO_SYNC_MASK, 0);
        }
}

static void ath9k_hw_setslottime(struct ath_hw *ah, u32 us)
{
        u32 val = ath9k_hw_mac_to_clks(ah, us);
        val = min(val, (u32) 0xFFFF);
        REG_WRITE(ah, AR_D_GBL_IFS_SLOT, val);
}

static void ath9k_hw_set_ack_timeout(struct ath_hw *ah, u32 us)
{
        u32 val = ath9k_hw_mac_to_clks(ah, us);
        val = min(val, (u32) MS(0xFFFFFFFF, AR_TIME_OUT_ACK));
        REG_RMW_FIELD(ah, AR_TIME_OUT, AR_TIME_OUT_ACK, val);
}

static void ath9k_hw_set_cts_timeout(struct ath_hw *ah, u32 us)
{
        u32 val = ath9k_hw_mac_to_clks(ah, us);
        val = min(val, (u32) MS(0xFFFFFFFF, AR_TIME_OUT_CTS));
        REG_RMW_FIELD(ah, AR_TIME_OUT, AR_TIME_OUT_CTS, val);
}

static int ath9k_hw_set_global_txtimeout(struct ath_hw *ah, u32 tu)
{
        if (tu > 0xFFFF) {
                DBG("ath9k: "
                        "bad global tx timeout %d\n", tu);
                ah->globaltxtimeout = (u32) -1;
                return 0;
        } else {
                REG_RMW_FIELD(ah, AR_GTXTO, AR_GTXTO_TIMEOUT_LIMIT, tu);
                ah->globaltxtimeout = tu;
                return 1;
        }
}

void ath9k_hw_init_global_settings(struct ath_hw *ah)
{
        int acktimeout;
        int slottime;
        int sifstime;

        DBG2("ath9k: ah->misc_mode 0x%x\n",
                ah->misc_mode);

        if (ah->misc_mode != 0)
                REG_SET_BIT(ah, AR_PCU_MISC, ah->misc_mode);

        if ((ah->dev->channels + ah->dev->channel)->band == NET80211_BAND_5GHZ)
                sifstime = 16;
        else
                sifstime = 10;

        /* As defined by IEEE 802.11-2007 17.3.8.6 */
        slottime = ah->slottime + 3 * ah->coverage_class;
        acktimeout = slottime + sifstime;

        /*
         * Workaround for early ACK timeouts, add an offset to match the
         * initval's 64us ack timeout value.
         * This was initially only meant to work around an issue with delayed
         * BA frames in some implementations, but it has been found to fix ACK
         * timeout issues in other cases as well.
         */
        if ((ah->dev->channels + ah->dev->channel)->band == NET80211_BAND_2GHZ)
                acktimeout += 64 - sifstime - ah->slottime;

        ath9k_hw_setslottime(ah, ah->slottime);
        ath9k_hw_set_ack_timeout(ah, acktimeout);
        ath9k_hw_set_cts_timeout(ah, acktimeout);
        if (ah->globaltxtimeout != (u32) -1)
                ath9k_hw_set_global_txtimeout(ah, ah->globaltxtimeout);
}

void ath9k_hw_deinit(struct ath_hw *ah)
{
        struct ath_common *common = ath9k_hw_common(ah);

        if (common->state < ATH_HW_INITIALIZED)
                goto free_hw;

        ath9k_hw_setpower(ah, ATH9K_PM_FULL_SLEEP);

free_hw:
        ath9k_hw_rf_free_ext_banks(ah);
}

/*******/
/* INI */
/*******/

u32 ath9k_regd_get_ctl(struct ath_regulatory *reg, struct ath9k_channel *chan)
{
        u32 ctl = ath_regd_get_band_ctl(reg, chan->chan->band);

        if (IS_CHAN_B(chan))
                ctl |= CTL_11B;
        else if (IS_CHAN_G(chan))
                ctl |= CTL_11G;
        else
                ctl |= CTL_11A;

        return ctl;
}

/****************************************/
/* Reset and Channel Switching Routines */
/****************************************/

static inline void ath9k_hw_set_dma(struct ath_hw *ah)
{
        struct ath_common *common = ath9k_hw_common(ah);

        ENABLE_REGWRITE_BUFFER(ah);

        /*
         * set AHB_MODE not to do cacheline prefetches
        */
        if (!AR_SREV_9300_20_OR_LATER(ah))
                REG_SET_BIT(ah, AR_AHB_MODE, AR_AHB_PREFETCH_RD_EN);

        /*
         * let mac dma reads be in 128 byte chunks
         */
        REG_RMW(ah, AR_TXCFG, AR_TXCFG_DMASZ_128B, AR_TXCFG_DMASZ_MASK);

        REGWRITE_BUFFER_FLUSH(ah);

        /*
         * Restore TX Trigger Level to its pre-reset value.
         * The initial value depends on whether aggregation is enabled, and is
         * adjusted whenever underruns are detected.
         */
        if (!AR_SREV_9300_20_OR_LATER(ah))
                REG_RMW_FIELD(ah, AR_TXCFG, AR_FTRIG, ah->tx_trig_level);

        ENABLE_REGWRITE_BUFFER(ah);

        /*
         * let mac dma writes be in 128 byte chunks
         */
        REG_RMW(ah, AR_RXCFG, AR_RXCFG_DMASZ_128B, AR_RXCFG_DMASZ_MASK);

        /*
         * Setup receive FIFO threshold to hold off TX activities
         */
        REG_WRITE(ah, AR_RXFIFO_CFG, 0x200);

        if (AR_SREV_9300_20_OR_LATER(ah)) {
                REG_RMW_FIELD(ah, AR_RXBP_THRESH, AR_RXBP_THRESH_HP, 0x1);
                REG_RMW_FIELD(ah, AR_RXBP_THRESH, AR_RXBP_THRESH_LP, 0x1);

                ath9k_hw_set_rx_bufsize(ah, common->rx_bufsize -
                        ah->caps.rx_status_len);
        }

        /*
         * reduce the number of usable entries in PCU TXBUF to avoid
         * wrap around issues.
         */
        if (AR_SREV_9285(ah)) {
                /* For AR9285 the number of Fifos are reduced to half.
                 * So set the usable tx buf size also to half to
                 * avoid data/delimiter underruns
                 */
                REG_WRITE(ah, AR_PCU_TXBUF_CTRL,
                          AR_9285_PCU_TXBUF_CTRL_USABLE_SIZE);
        } else if (!AR_SREV_9271(ah)) {
                REG_WRITE(ah, AR_PCU_TXBUF_CTRL,
                          AR_PCU_TXBUF_CTRL_USABLE_SIZE);
        }

        REGWRITE_BUFFER_FLUSH(ah);

        if (AR_SREV_9300_20_OR_LATER(ah))
                ath9k_hw_reset_txstatus_ring(ah);
}

static void ath9k_hw_set_operating_mode(struct ath_hw *ah)
{
        u32 mask = AR_STA_ID1_STA_AP | AR_STA_ID1_ADHOC;
        u32 set = AR_STA_ID1_KSRCH_MODE;

        REG_CLR_BIT(ah, AR_CFG, AR_CFG_AP_ADHOC_INDICATION);

        REG_RMW(ah, AR_STA_ID1, set, mask);
}

void ath9k_hw_get_delta_slope_vals(struct ath_hw *ah __unused, u32 coef_scaled,
                                   u32 *coef_mantissa, u32 *coef_exponent)
{
        u32 coef_exp, coef_man;

        for (coef_exp = 31; coef_exp > 0; coef_exp--)
                if ((coef_scaled >> coef_exp) & 0x1)
                        break;

        coef_exp = 14 - (coef_exp - COEF_SCALE_S);

        coef_man = coef_scaled + (1 << (COEF_SCALE_S - coef_exp - 1));

        *coef_mantissa = coef_man >> (COEF_SCALE_S - coef_exp);
        *coef_exponent = coef_exp - 16;
}

static int ath9k_hw_set_reset(struct ath_hw *ah, int type)
{
        u32 rst_flags;
        u32 tmpReg;

        if (AR_SREV_9100(ah)) {
                REG_RMW_FIELD(ah, AR_RTC_DERIVED_CLK,
                              AR_RTC_DERIVED_CLK_PERIOD, 1);
                (void)REG_READ(ah, AR_RTC_DERIVED_CLK);
        }

        ENABLE_REGWRITE_BUFFER(ah);

        if (AR_SREV_9300_20_OR_LATER(ah)) {
                REG_WRITE(ah, AR_WA, ah->WARegVal);
                udelay(10);
        }

        REG_WRITE(ah, AR_RTC_FORCE_WAKE, AR_RTC_FORCE_WAKE_EN |
                  AR_RTC_FORCE_WAKE_ON_INT);

        if (AR_SREV_9100(ah)) {
                rst_flags = AR_RTC_RC_MAC_WARM | AR_RTC_RC_MAC_COLD |
                        AR_RTC_RC_COLD_RESET | AR_RTC_RC_WARM_RESET;
        } else {
                tmpReg = REG_READ(ah, AR_INTR_SYNC_CAUSE);
                if (tmpReg &
                    (AR_INTR_SYNC_LOCAL_TIMEOUT |
                     AR_INTR_SYNC_RADM_CPL_TIMEOUT)) {
                        u32 val;
                        REG_WRITE(ah, AR_INTR_SYNC_ENABLE, 0);

                        val = AR_RC_HOSTIF;
                        if (!AR_SREV_9300_20_OR_LATER(ah))
                                val |= AR_RC_AHB;
                        REG_WRITE(ah, AR_RC, val);

                } else if (!AR_SREV_9300_20_OR_LATER(ah))
                        REG_WRITE(ah, AR_RC, AR_RC_AHB);

                rst_flags = AR_RTC_RC_MAC_WARM;
                if (type == ATH9K_RESET_COLD)
                        rst_flags |= AR_RTC_RC_MAC_COLD;
        }

        REG_WRITE(ah, AR_RTC_RC, rst_flags);

        REGWRITE_BUFFER_FLUSH(ah);

        udelay(50);

        REG_WRITE(ah, AR_RTC_RC, 0);
        if (!ath9k_hw_wait(ah, AR_RTC_RC, AR_RTC_RC_M, 0, AH_WAIT_TIMEOUT)) {
                DBG("ath9k: "
                        "RTC stuck in MAC reset\n");
                return 0;
        }

        if (!AR_SREV_9100(ah))
                REG_WRITE(ah, AR_RC, 0);

        if (AR_SREV_9100(ah))
                udelay(50);

        return 1;
}

static int ath9k_hw_set_reset_power_on(struct ath_hw *ah)
{
        ENABLE_REGWRITE_BUFFER(ah);

        if (AR_SREV_9300_20_OR_LATER(ah)) {
                REG_WRITE(ah, AR_WA, ah->WARegVal);
                udelay(10);
        }

        REG_WRITE(ah, AR_RTC_FORCE_WAKE, AR_RTC_FORCE_WAKE_EN |
                  AR_RTC_FORCE_WAKE_ON_INT);

        if (!AR_SREV_9100(ah) && !AR_SREV_9300_20_OR_LATER(ah))
                REG_WRITE(ah, AR_RC, AR_RC_AHB);

        REG_WRITE(ah, AR_RTC_RESET, 0);

        REGWRITE_BUFFER_FLUSH(ah);

        if (!AR_SREV_9300_20_OR_LATER(ah))
                udelay(2);

        if (!AR_SREV_9100(ah) && !AR_SREV_9300_20_OR_LATER(ah))
                REG_WRITE(ah, AR_RC, 0);

        REG_WRITE(ah, AR_RTC_RESET, 1);

        if (!ath9k_hw_wait(ah,
                           AR_RTC_STATUS,
                           AR_RTC_STATUS_M,
                           AR_RTC_STATUS_ON,
                           AH_WAIT_TIMEOUT)) {
                DBG("ath9k: "
                        "RTC not waking up\n");
                return 0;
        }

        return ath9k_hw_set_reset(ah, ATH9K_RESET_WARM);
}

static int ath9k_hw_set_reset_reg(struct ath_hw *ah, u32 type)
{
        if (AR_SREV_9300_20_OR_LATER(ah)) {
                REG_WRITE(ah, AR_WA, ah->WARegVal);
                udelay(10);
        }

        REG_WRITE(ah, AR_RTC_FORCE_WAKE,
                  AR_RTC_FORCE_WAKE_EN | AR_RTC_FORCE_WAKE_ON_INT);

        switch (type) {
        case ATH9K_RESET_POWER_ON:
                return ath9k_hw_set_reset_power_on(ah);
        case ATH9K_RESET_WARM:
        case ATH9K_RESET_COLD:
                return ath9k_hw_set_reset(ah, type);
        default:
                return 0;
        }
}

static int ath9k_hw_chip_reset(struct ath_hw *ah,
                                struct ath9k_channel *chan)
{
        if (AR_SREV_9280(ah) && ah->eep_ops->get_eeprom(ah, EEP_OL_PWRCTRL)) {
                if (!ath9k_hw_set_reset_reg(ah, ATH9K_RESET_POWER_ON))
                        return 0;
        } else if (!ath9k_hw_set_reset_reg(ah, ATH9K_RESET_WARM))
                return 0;

        if (!ath9k_hw_setpower(ah, ATH9K_PM_AWAKE))
                return 0;

        ah->chip_fullsleep = 0;
        ath9k_hw_init_pll(ah, chan);
        ath9k_hw_set_rfmode(ah, chan);

        return 1;
}

static int ath9k_hw_channel_change(struct ath_hw *ah,
                                    struct ath9k_channel *chan)
{
        struct ath_regulatory *regulatory = ath9k_hw_regulatory(ah);
        struct net80211_channel *channel = chan->chan;
        u32 qnum;
        int r;

        for (qnum = 0; qnum < AR_NUM_QCU; qnum++) {
                if (ath9k_hw_numtxpending(ah, qnum)) {
                        DBG("ath9k: "
                                "Transmit frames pending on queue %d\n", qnum);
                        return 0;
                }
        }

        if (!ath9k_hw_rfbus_req(ah)) {
                DBG("ath9k: Could not kill baseband RX\n");
                return 0;
        }

        ath9k_hw_set_channel_regs(ah, chan);

        r = ath9k_hw_rf_set_freq(ah, chan);
        if (r) {
                DBG("ath9k: Failed to set channel\n");
                return 0;
        }
        ath9k_hw_set_clockrate(ah);

        ah->eep_ops->set_txpower(ah, chan,
                             ath9k_regd_get_ctl(regulatory, chan),
                             0,
                             channel->maxpower * 2,
                             min((u32) MAX_RATE_POWER,
                             (u32) regulatory->power_limit), 0);

        ath9k_hw_rfbus_done(ah);

        if (IS_CHAN_OFDM(chan) || IS_CHAN_HT(chan))
                ath9k_hw_set_delta_slope(ah, chan);

        ath9k_hw_spur_mitigate_freq(ah, chan);

        return 1;
}

static void ath9k_hw_apply_gpio_override(struct ath_hw *ah)
{
        u32 gpio_mask = ah->gpio_mask;
        int i;

        for (i = 0; gpio_mask; i++, gpio_mask >>= 1) {
                if (!(gpio_mask & 1))
                        continue;

                ath9k_hw_cfg_output(ah, i, AR_GPIO_OUTPUT_MUX_AS_OUTPUT);
                ath9k_hw_set_gpio(ah, i, !!(ah->gpio_val & BIT(i)));
        }
}

int ath9k_hw_check_alive(struct ath_hw *ah)
{
        int count = 50;
        u32 reg;

        if (AR_SREV_9285_12_OR_LATER(ah))
                return 1;

        do {
                reg = REG_READ(ah, AR_OBS_BUS_1);

                if ((reg & 0x7E7FFFEF) == 0x00702400)
                        continue;

                switch (reg & 0x7E000B00) {
                case 0x1E000000:
                case 0x52000B00:
                case 0x18000B00:
                        continue;
                default:
                        return 1;
                }
        } while (count-- > 0);

        return 0;
}

int ath9k_hw_reset(struct ath_hw *ah, struct ath9k_channel *chan,
                   struct ath9k_hw_cal_data *caldata, int bChannelChange)
{
        struct ath_common *common = ath9k_hw_common(ah);
        u32 saveLedState;
        struct ath9k_channel *curchan = ah->curchan;
        u32 saveDefAntenna;
        u32 macStaId1;
        int i, r;

        ah->txchainmask = common->tx_chainmask;
        ah->rxchainmask = common->rx_chainmask;

        if (!ath9k_hw_setpower(ah, ATH9K_PM_AWAKE))
                return -EIO;

        if (curchan && !ah->chip_fullsleep)
                ath9k_hw_getnf(ah, curchan);

        ah->caldata = caldata;
        if (caldata &&
            (chan->channel != caldata->channel ||
             (chan->channelFlags & ~CHANNEL_CW_INT) !=
             (caldata->channelFlags & ~CHANNEL_CW_INT))) {
                /* Operating channel changed, reset channel calibration data */
                memset(caldata, 0, sizeof(*caldata));
                ath9k_init_nfcal_hist_buffer(ah, chan);
        }

        if (bChannelChange &&
            (ah->chip_fullsleep != 1) &&
            (ah->curchan != NULL) &&
            (chan->channel != ah->curchan->channel) &&
            ((chan->channelFlags & CHANNEL_ALL) ==
             (ah->curchan->channelFlags & CHANNEL_ALL)) &&
            (!AR_SREV_9280(ah) || AR_DEVID_7010(ah))) {

                if (ath9k_hw_channel_change(ah, chan)) {
                        ath9k_hw_loadnf(ah, ah->curchan);
                        ath9k_hw_start_nfcal(ah, 1);
                        if (AR_SREV_9271(ah))
                                ar9002_hw_load_ani_reg(ah, chan);
                        return 0;
                }
        }

        saveDefAntenna = REG_READ(ah, AR_DEF_ANTENNA);
        if (saveDefAntenna == 0)
                saveDefAntenna = 1;

        macStaId1 = REG_READ(ah, AR_STA_ID1) & AR_STA_ID1_BASE_RATE_11B;

        saveLedState = REG_READ(ah, AR_CFG_LED) &
                (AR_CFG_LED_ASSOC_CTL | AR_CFG_LED_MODE_SEL |
                 AR_CFG_LED_BLINK_THRESH_SEL | AR_CFG_LED_BLINK_SLOW);

        ath9k_hw_mark_phy_inactive(ah);

        ah->paprd_table_write_done = 0;

        /* Only required on the first reset */
        if (AR_SREV_9271(ah) && ah->htc_reset_init) {
                REG_WRITE(ah,
                          AR9271_RESET_POWER_DOWN_CONTROL,
                          AR9271_RADIO_RF_RST);
                udelay(50);
        }

        if (!ath9k_hw_chip_reset(ah, chan)) {
                DBG("ath9k: Chip reset failed\n");
                return -EINVAL;
        }

        /* Only required on the first reset */
        if (AR_SREV_9271(ah) && ah->htc_reset_init) {
                ah->htc_reset_init = 0;
                REG_WRITE(ah,
                          AR9271_RESET_POWER_DOWN_CONTROL,
                          AR9271_GATE_MAC_CTL);
                udelay(50);
        }

        if (AR_SREV_9280_20_OR_LATER(ah))
                REG_SET_BIT(ah, AR_GPIO_INPUT_EN_VAL, AR_GPIO_JTAG_DISABLE);

        if (!AR_SREV_9300_20_OR_LATER(ah))
                ar9002_hw_enable_async_fifo(ah);

        r = ath9k_hw_process_ini(ah, chan);
        if (r)
                return r;

        /* Setup MFP options for CCMP */
        if (AR_SREV_9280_20_OR_LATER(ah)) {
                /* Mask Retry(b11), PwrMgt(b12), MoreData(b13) to 0 in mgmt
                 * frames when constructing CCMP AAD. */
                REG_RMW_FIELD(ah, AR_AES_MUTE_MASK1, AR_AES_MUTE_MASK1_FC_MGMT,
                              0xc7ff);
                ah->sw_mgmt_crypto = 0;
        } else if (AR_SREV_9160_10_OR_LATER(ah)) {
                /* Disable hardware crypto for management frames */
                REG_CLR_BIT(ah, AR_PCU_MISC_MODE2,
                            AR_PCU_MISC_MODE2_MGMT_CRYPTO_ENABLE);
                REG_SET_BIT(ah, AR_PCU_MISC_MODE2,
                            AR_PCU_MISC_MODE2_NO_CRYPTO_FOR_NON_DATA_PKT);
                ah->sw_mgmt_crypto = 1;
        } else
                ah->sw_mgmt_crypto = 1;

        if (IS_CHAN_OFDM(chan) || IS_CHAN_HT(chan))
                ath9k_hw_set_delta_slope(ah, chan);

        ath9k_hw_spur_mitigate_freq(ah, chan);
        ah->eep_ops->set_board_values(ah, chan);

        ENABLE_REGWRITE_BUFFER(ah);

        REG_WRITE(ah, AR_STA_ID0, get_unaligned_le32(common->macaddr));
        REG_WRITE(ah, AR_STA_ID1, get_unaligned_le16(common->macaddr + 4)
                  | macStaId1
                  | AR_STA_ID1_RTS_USE_DEF
                  | (ah->config.
                     ack_6mb ? AR_STA_ID1_ACKCTS_6MB : 0)
                  | ah->sta_id1_defaults);
        ath_hw_setbssidmask(common);
        REG_WRITE(ah, AR_DEF_ANTENNA, saveDefAntenna);
        ath9k_hw_write_associd(ah);
        REG_WRITE(ah, AR_ISR, ~0);
        REG_WRITE(ah, AR_RSSI_THR, INIT_RSSI_THR);

        REGWRITE_BUFFER_FLUSH(ah);

        ath9k_hw_set_operating_mode(ah);

        r = ath9k_hw_rf_set_freq(ah, chan);
        if (r)
                return r;

        ath9k_hw_set_clockrate(ah);

        ENABLE_REGWRITE_BUFFER(ah);

        for (i = 0; i < AR_NUM_DCU; i++)
                REG_WRITE(ah, AR_DQCUMASK(i), 1 << i);

        REGWRITE_BUFFER_FLUSH(ah);

        ah->intr_txqs = 0;
        for (i = 0; i < ATH9K_NUM_TX_QUEUES; i++)
                ath9k_hw_resettxqueue(ah, i);

        ath9k_hw_init_interrupt_masks(ah);
        ath9k_hw_ani_cache_ini_regs(ah);

        if (ah->caps.hw_caps & ATH9K_HW_CAP_RFSILENT)
                ath9k_hw_cfg_gpio_input(ah, ah->rfkill_gpio);

        ath9k_hw_init_global_settings(ah);

        if (!AR_SREV_9300_20_OR_LATER(ah)) {
                ar9002_hw_update_async_fifo(ah);
                ar9002_hw_enable_wep_aggregation(ah);
        }

        REG_SET_BIT(ah, AR_STA_ID1, AR_STA_ID1_PRESERVE_SEQNUM);

        ath9k_hw_set_dma(ah);

        REG_WRITE(ah, AR_OBS, 8);

        if (ah->config.rx_intr_mitigation) {
                REG_RMW_FIELD(ah, AR_RIMT, AR_RIMT_LAST, 500);
                REG_RMW_FIELD(ah, AR_RIMT, AR_RIMT_FIRST, 2000);
        }

        if (ah->config.tx_intr_mitigation) {
                REG_RMW_FIELD(ah, AR_TIMT, AR_TIMT_LAST, 300);
                REG_RMW_FIELD(ah, AR_TIMT, AR_TIMT_FIRST, 750);
        }

        ath9k_hw_init_bb(ah, chan);

        if (!ath9k_hw_init_cal(ah, chan))
                return -EIO;

        ENABLE_REGWRITE_BUFFER(ah);

        ath9k_hw_restore_chainmask(ah);
        REG_WRITE(ah, AR_CFG_LED, saveLedState | AR_CFG_SCLK_32KHZ);

        REGWRITE_BUFFER_FLUSH(ah);

        /*
         * For big endian systems turn on swapping for descriptors
         */
        if (AR_SREV_9100(ah)) {
                u32 mask;
                mask = REG_READ(ah, AR_CFG);
                if (mask & (AR_CFG_SWRB | AR_CFG_SWTB | AR_CFG_SWRG)) {
                        DBG2("ath9k: "
                                "CFG Byte Swap Set 0x%x\n", mask);
                } else {
                        mask =
                                INIT_CONFIG_STATUS | AR_CFG_SWRB | AR_CFG_SWTB;
                        REG_WRITE(ah, AR_CFG, mask);
                        DBG2("ath9k: "
                                "Setting CFG 0x%x\n", REG_READ(ah, AR_CFG));
                }
        } else {
                if (common->bus_ops->ath_bus_type == ATH_USB) {
                        /* Configure AR9271 target WLAN */
                        if (AR_SREV_9271(ah))
                                REG_WRITE(ah, AR_CFG, AR_CFG_SWRB | AR_CFG_SWTB);
                        else
                                REG_WRITE(ah, AR_CFG, AR_CFG_SWTD | AR_CFG_SWRD);
                }
#if __BYTE_ORDER == __BIG_ENDIAN
                else if (AR_SREV_9340(ah))
                        REG_RMW(ah, AR_CFG, AR_CFG_SWRB | AR_CFG_SWTB, 0);
                else
                        REG_WRITE(ah, AR_CFG, AR_CFG_SWTD | AR_CFG_SWRD);
#endif
        }

        if (AR_SREV_9300_20_OR_LATER(ah)) {
                ar9003_hw_disable_phy_restart(ah);
        }

        ath9k_hw_apply_gpio_override(ah);

        return 0;
}

/******************************/
/* Power Management (Chipset) */
/******************************/

/*
 * Notify Power Mgt is disabled in self-generated frames.
 * If requested, force chip to sleep.
 */
static void ath9k_set_power_sleep(struct ath_hw *ah, int setChip)
{
        REG_SET_BIT(ah, AR_STA_ID1, AR_STA_ID1_PWR_SAV);
        if (setChip) {
                /*
                 * Clear the RTC force wake bit to allow the
                 * mac to go to sleep.
                 */
                REG_CLR_BIT(ah, AR_RTC_FORCE_WAKE,
                            AR_RTC_FORCE_WAKE_EN);
                if (!AR_SREV_9100(ah) && !AR_SREV_9300_20_OR_LATER(ah))
                        REG_WRITE(ah, AR_RC, AR_RC_AHB | AR_RC_HOSTIF);

                /* Shutdown chip. Active low */
                if (!AR_SREV_5416(ah) && !AR_SREV_9271(ah))
                        REG_CLR_BIT(ah, (AR_RTC_RESET),
                                    AR_RTC_RESET_EN);
        }

        /* Clear Bit 14 of AR_WA after putting chip into Full Sleep mode. */
        if (AR_SREV_9300_20_OR_LATER(ah))
                REG_WRITE(ah, AR_WA,
                          ah->WARegVal & ~AR_WA_D3_L1_DISABLE);
}

static int ath9k_hw_set_power_awake(struct ath_hw *ah, int setChip)
{
        u32 val;
        int i;

        /* Set Bits 14 and 17 of AR_WA before powering on the chip. */
        if (AR_SREV_9300_20_OR_LATER(ah)) {
                REG_WRITE(ah, AR_WA, ah->WARegVal);
                udelay(10);
        }

        if (setChip) {
                if ((REG_READ(ah, AR_RTC_STATUS) &
                     AR_RTC_STATUS_M) == AR_RTC_STATUS_SHUTDOWN) {
                        if (ath9k_hw_set_reset_reg(ah,
                                           ATH9K_RESET_POWER_ON) != 1) {
                                return 0;
                        }
                        if (!AR_SREV_9300_20_OR_LATER(ah))
                                ath9k_hw_init_pll(ah, NULL);
                }
                if (AR_SREV_9100(ah))
                        REG_SET_BIT(ah, AR_RTC_RESET,
                                    AR_RTC_RESET_EN);

                REG_SET_BIT(ah, AR_RTC_FORCE_WAKE,
                            AR_RTC_FORCE_WAKE_EN);
                udelay(50);

                for (i = POWER_UP_TIME / 50; i > 0; i--) {
                        val = REG_READ(ah, AR_RTC_STATUS) & AR_RTC_STATUS_M;
                        if (val == AR_RTC_STATUS_ON)
                                break;
                        udelay(50);
                        REG_SET_BIT(ah, AR_RTC_FORCE_WAKE,
                                    AR_RTC_FORCE_WAKE_EN);
                }
                if (i == 0) {
                        DBG("ath9k: "
                                "Failed to wakeup in %dus\n",
                                POWER_UP_TIME / 20);
                        return 0;
                }
        }

        REG_CLR_BIT(ah, AR_STA_ID1, AR_STA_ID1_PWR_SAV);

        return 1;
}

int ath9k_hw_setpower(struct ath_hw *ah, enum ath9k_power_mode mode)
{
        int status = 1, setChip = 1;
        static const char *modes[] = {
                "AWAKE",
                "FULL-SLEEP",
                "NETWORK SLEEP",
                "UNDEFINED"
        };

        if (ah->power_mode == mode)
                return status;

        DBG2("ath9k: %s -> %s\n",
                modes[ah->power_mode], modes[mode]);

        switch (mode) {
        case ATH9K_PM_AWAKE:
                status = ath9k_hw_set_power_awake(ah, setChip);
                break;
        case ATH9K_PM_FULL_SLEEP:
                ath9k_set_power_sleep(ah, setChip);
                ah->chip_fullsleep = 1;
                break;
        default:
                DBG("ath9k: Unknown power mode %d\n", mode);
                return 0;
        }
        ah->power_mode = mode;

        return status;
}

/*******************/
/* HW Capabilities */
/*******************/

int ath9k_hw_fill_cap_info(struct ath_hw *ah)
{
        struct ath9k_hw_capabilities *pCap = &ah->caps;
        struct ath_regulatory *regulatory = ath9k_hw_regulatory(ah);
        struct ath_common *common = ath9k_hw_common(ah);

        u16 eeval;
        u8 ant_div_ctl1, tx_chainmask, rx_chainmask;

        eeval = ah->eep_ops->get_eeprom(ah, EEP_REG_0);
        regulatory->current_rd = eeval;

        eeval = ah->eep_ops->get_eeprom(ah, EEP_REG_1);
        if (AR_SREV_9285_12_OR_LATER(ah))
                eeval |= AR9285_RDEXT_DEFAULT;
        regulatory->current_rd_ext = eeval;

        if (ah->hw_version.subvendorid == AR_SUBVENDOR_ID_NEW_A) {
                if (regulatory->current_rd == 0x64 ||
                    regulatory->current_rd == 0x65)
                        regulatory->current_rd += 5;
                else if (regulatory->current_rd == 0x41)
                        regulatory->current_rd = 0x43;
                DBG2("ath9k: "
                        "regdomain mapped to 0x%x\n", regulatory->current_rd);
        }

        eeval = ah->eep_ops->get_eeprom(ah, EEP_OP_MODE);
        if ((eeval & (AR5416_OPFLAGS_11G | AR5416_OPFLAGS_11A)) == 0) {
                DBG("ath9k: "
                        "no band has been marked as supported in EEPROM\n");
                return -EINVAL;
        }

        if (eeval & AR5416_OPFLAGS_11A)
                pCap->hw_caps |= ATH9K_HW_CAP_5GHZ;

        if (eeval & AR5416_OPFLAGS_11G)
                pCap->hw_caps |= ATH9K_HW_CAP_2GHZ;

        pCap->tx_chainmask = ah->eep_ops->get_eeprom(ah, EEP_TX_MASK);
        /*
         * For AR9271 we will temporarilly uses the rx chainmax as read from
         * the EEPROM.
         */
        if ((ah->hw_version.devid == AR5416_DEVID_PCI) &&
            !(eeval & AR5416_OPFLAGS_11A) &&
            !(AR_SREV_9271(ah)))
                /* CB71: GPIO 0 is pulled down to indicate 3 rx chains */
                pCap->rx_chainmask = ath9k_hw_gpio_get(ah, 0) ? 0x5 : 0x7;
        else if (AR_SREV_9100(ah))
                pCap->rx_chainmask = 0x7;
        else
                /* Use rx_chainmask from EEPROM. */
                pCap->rx_chainmask = ah->eep_ops->get_eeprom(ah, EEP_RX_MASK);

        ah->misc_mode |= AR_PCU_MIC_NEW_LOC_ENA;

        /* enable key search for every frame in an aggregate */
        if (AR_SREV_9300_20_OR_LATER(ah))
                ah->misc_mode |= AR_PCU_ALWAYS_PERFORM_KEYSEARCH;

        common->crypt_caps |= ATH_CRYPT_CAP_CIPHER_AESCCM;

        pCap->hw_caps &= ~ATH9K_HW_CAP_HT;

        if (AR_SREV_9271(ah))
                pCap->num_gpio_pins = AR9271_NUM_GPIO;
        else if (AR_DEVID_7010(ah))
                pCap->num_gpio_pins = AR7010_NUM_GPIO;
        else if (AR_SREV_9285_12_OR_LATER(ah))
                pCap->num_gpio_pins = AR9285_NUM_GPIO;
        else if (AR_SREV_9280_20_OR_LATER(ah))
                pCap->num_gpio_pins = AR928X_NUM_GPIO;
        else
                pCap->num_gpio_pins = AR_NUM_GPIO;

        if (AR_SREV_9160_10_OR_LATER(ah) || AR_SREV_9100(ah)) {
                pCap->hw_caps |= ATH9K_HW_CAP_CST;
                pCap->rts_aggr_limit = ATH_AMPDU_LIMIT_MAX;
        } else {
                pCap->rts_aggr_limit = (8 * 1024);
        }

        ah->rfsilent = ah->eep_ops->get_eeprom(ah, EEP_RF_SILENT);
        if (ah->rfsilent & EEP_RFSILENT_ENABLED) {
                ah->rfkill_gpio =
                        MS(ah->rfsilent, EEP_RFSILENT_GPIO_SEL);
                ah->rfkill_polarity =
                        MS(ah->rfsilent, EEP_RFSILENT_POLARITY);

                pCap->hw_caps |= ATH9K_HW_CAP_RFSILENT;
        }

        pCap->hw_caps &= ~ATH9K_HW_CAP_AUTOSLEEP;

        if (AR_SREV_9280(ah) || AR_SREV_9285(ah))
                pCap->hw_caps &= ~ATH9K_HW_CAP_4KB_SPLITTRANS;
        else
                pCap->hw_caps |= ATH9K_HW_CAP_4KB_SPLITTRANS;

        if (AR_SREV_9300_20_OR_LATER(ah)) {
                pCap->hw_caps |= ATH9K_HW_CAP_FASTCLOCK;
                if (!AR_SREV_9485(ah))
                        pCap->hw_caps |= ATH9K_HW_CAP_LDPC;

                pCap->rx_hp_qdepth = ATH9K_HW_RX_HP_QDEPTH;
                pCap->rx_lp_qdepth = ATH9K_HW_RX_LP_QDEPTH;
                pCap->rx_status_len = sizeof(struct ar9003_rxs);
                pCap->tx_desc_len = sizeof(struct ar9003_txc);
                pCap->txs_len = sizeof(struct ar9003_txs);
                if (!ah->config.paprd_disable &&
                    ah->eep_ops->get_eeprom(ah, EEP_PAPRD))
                        pCap->hw_caps |= ATH9K_HW_CAP_PAPRD;
        } else {
                pCap->tx_desc_len = sizeof(struct ath_desc);
                if (AR_SREV_9280_20(ah) &&
                    ((ah->eep_ops->get_eeprom(ah, EEP_MINOR_REV) <=
                      AR5416_EEP_MINOR_VER_16) ||
                     ah->eep_ops->get_eeprom(ah, EEP_FSTCLK_5G)))
                        pCap->hw_caps |= ATH9K_HW_CAP_FASTCLOCK;
        }

        if (AR_SREV_9300_20_OR_LATER(ah))
                pCap->hw_caps |= ATH9K_HW_CAP_RAC_SUPPORTED;

        if (AR_SREV_9300_20_OR_LATER(ah))
                ah->ent_mode = REG_READ(ah, AR_ENT_OTP);

        if (AR_SREV_9287_11_OR_LATER(ah) || AR_SREV_9271(ah))
                pCap->hw_caps |= ATH9K_HW_CAP_SGI_20;

        if (AR_SREV_9285(ah))
                if (ah->eep_ops->get_eeprom(ah, EEP_MODAL_VER) >= 3) {
                        ant_div_ctl1 =
                                ah->eep_ops->get_eeprom(ah, EEP_ANT_DIV_CTL1);
                        if ((ant_div_ctl1 & 0x1) && ((ant_div_ctl1 >> 3) & 0x1))
                                pCap->hw_caps |= ATH9K_HW_CAP_ANT_DIV_COMB;
                }
        if (AR_SREV_9300_20_OR_LATER(ah)) {
                if (ah->eep_ops->get_eeprom(ah, EEP_CHAIN_MASK_REDUCE))
                        pCap->hw_caps |= ATH9K_HW_CAP_APM;
        }


        if (AR_SREV_9485(ah)) {
                ant_div_ctl1 = ah->eep_ops->get_eeprom(ah, EEP_ANT_DIV_CTL1);
                /*
                 * enable the diversity-combining algorithm only when
                 * both enable_lna_div and enable_fast_div are set
                 *              Table for Diversity
                 * ant_div_alt_lnaconf          bit 0-1
                 * ant_div_main_lnaconf         bit 2-3
                 * ant_div_alt_gaintb           bit 4
                 * ant_div_main_gaintb          bit 5
                 * enable_ant_div_lnadiv        bit 6
                 * enable_ant_fast_div          bit 7
                 */
                if ((ant_div_ctl1 >> 0x6) == 0x3)
                        pCap->hw_caps |= ATH9K_HW_CAP_ANT_DIV_COMB;
        }

        if (AR_SREV_9485_10(ah)) {
                pCap->pcie_lcr_extsync_en = 1;
                pCap->pcie_lcr_offset = 0x80;
        }

        tx_chainmask = pCap->tx_chainmask;
        rx_chainmask = pCap->rx_chainmask;
        while (tx_chainmask || rx_chainmask) {
                if (tx_chainmask & BIT(0))
                        pCap->max_txchains++;
                if (rx_chainmask & BIT(0))
                        pCap->max_rxchains++;

                tx_chainmask >>= 1;
                rx_chainmask >>= 1;
        }

        return 0;
}

/****************************/
/* GPIO / RFKILL / Antennae */
/****************************/

static void ath9k_hw_gpio_cfg_output_mux(struct ath_hw *ah,
                                         u32 gpio, u32 type)
{
        int addr;
        u32 gpio_shift, tmp;

        if (gpio > 11)
                addr = AR_GPIO_OUTPUT_MUX3;
        else if (gpio > 5)
                addr = AR_GPIO_OUTPUT_MUX2;
        else
                addr = AR_GPIO_OUTPUT_MUX1;

        gpio_shift = (gpio % 6) * 5;

        if (AR_SREV_9280_20_OR_LATER(ah)
            || (addr != AR_GPIO_OUTPUT_MUX1)) {
                REG_RMW(ah, addr, (type << gpio_shift),
                        (0x1f << gpio_shift));
        } else {
                tmp = REG_READ(ah, addr);
                tmp = ((tmp & 0x1F0) << 1) | (tmp & ~0x1F0);
                tmp &= ~(0x1f << gpio_shift);
                tmp |= (type << gpio_shift);
                REG_WRITE(ah, addr, tmp);
        }
}

void ath9k_hw_cfg_gpio_input(struct ath_hw *ah, u32 gpio)
{
        u32 gpio_shift;

        if (AR_DEVID_7010(ah)) {
                gpio_shift = gpio;
                REG_RMW(ah, AR7010_GPIO_OE,
                        (AR7010_GPIO_OE_AS_INPUT << gpio_shift),
                        (AR7010_GPIO_OE_MASK << gpio_shift));
                return;
        }

        gpio_shift = gpio << 1;
        REG_RMW(ah,
                AR_GPIO_OE_OUT,
                (AR_GPIO_OE_OUT_DRV_NO << gpio_shift),
                (AR_GPIO_OE_OUT_DRV << gpio_shift));
}

u32 ath9k_hw_gpio_get(struct ath_hw *ah, u32 gpio)
{
#define MS_REG_READ(x, y) \
        (MS(REG_READ(ah, AR_GPIO_IN_OUT), x##_GPIO_IN_VAL) & (AR_GPIO_BIT(y)))

        if (gpio >= ah->caps.num_gpio_pins)
                return 0xffffffff;

        if (AR_DEVID_7010(ah)) {
                u32 val;
                val = REG_READ(ah, AR7010_GPIO_IN);
                return (MS(val, AR7010_GPIO_IN_VAL) & AR_GPIO_BIT(gpio)) == 0;
        } else if (AR_SREV_9300_20_OR_LATER(ah))
                return (MS(REG_READ(ah, AR_GPIO_IN), AR9300_GPIO_IN_VAL) &
                        AR_GPIO_BIT(gpio)) != 0;
        else if (AR_SREV_9271(ah))
                return MS_REG_READ(AR9271, gpio) != 0;
        else if (AR_SREV_9287_11_OR_LATER(ah))
                return MS_REG_READ(AR9287, gpio) != 0;
        else if (AR_SREV_9285_12_OR_LATER(ah))
                return MS_REG_READ(AR9285, gpio) != 0;
        else if (AR_SREV_9280_20_OR_LATER(ah))
                return MS_REG_READ(AR928X, gpio) != 0;
        else
                return MS_REG_READ(AR, gpio) != 0;
}

void ath9k_hw_cfg_output(struct ath_hw *ah, u32 gpio,
                         u32 ah_signal_type)
{
        u32 gpio_shift;

        if (AR_DEVID_7010(ah)) {
                gpio_shift = gpio;
                REG_RMW(ah, AR7010_GPIO_OE,
                        (AR7010_GPIO_OE_AS_OUTPUT << gpio_shift),
                        (AR7010_GPIO_OE_MASK << gpio_shift));
                return;
        }

        ath9k_hw_gpio_cfg_output_mux(ah, gpio, ah_signal_type);
        gpio_shift = 2 * gpio;
        REG_RMW(ah,
                AR_GPIO_OE_OUT,
                (AR_GPIO_OE_OUT_DRV_ALL << gpio_shift),
                (AR_GPIO_OE_OUT_DRV << gpio_shift));
}

void ath9k_hw_set_gpio(struct ath_hw *ah, u32 gpio, u32 val)
{
        if (AR_DEVID_7010(ah)) {
                val = val ? 0 : 1;
                REG_RMW(ah, AR7010_GPIO_OUT, ((val&1) << gpio),
                        AR_GPIO_BIT(gpio));
                return;
        }

        if (AR_SREV_9271(ah))
                val = ~val;

        REG_RMW(ah, AR_GPIO_IN_OUT, ((val & 1) << gpio),
                AR_GPIO_BIT(gpio));
}

u32 ath9k_hw_getdefantenna(struct ath_hw *ah)
{
        return REG_READ(ah, AR_DEF_ANTENNA) & 0x7;
}

void ath9k_hw_setantenna(struct ath_hw *ah, u32 antenna)
{
        REG_WRITE(ah, AR_DEF_ANTENNA, (antenna & 0x7));
}

/*********************/
/* General Operation */
/*********************/

u32 ath9k_hw_getrxfilter(struct ath_hw *ah)
{
        u32 bits = REG_READ(ah, AR_RX_FILTER);
        u32 phybits = REG_READ(ah, AR_PHY_ERR);

        if (phybits & AR_PHY_ERR_RADAR)
                bits |= ATH9K_RX_FILTER_PHYRADAR;
        if (phybits & (AR_PHY_ERR_OFDM_TIMING | AR_PHY_ERR_CCK_TIMING))
                bits |= ATH9K_RX_FILTER_PHYERR;

        return bits;
}

void ath9k_hw_setrxfilter(struct ath_hw *ah, u32 bits)
{
        u32 phybits;

        ENABLE_REGWRITE_BUFFER(ah);

        REG_WRITE(ah, AR_RX_FILTER, bits);

        phybits = 0;
        if (bits & ATH9K_RX_FILTER_PHYRADAR)
                phybits |= AR_PHY_ERR_RADAR;
        if (bits & ATH9K_RX_FILTER_PHYERR)
                phybits |= AR_PHY_ERR_OFDM_TIMING | AR_PHY_ERR_CCK_TIMING;
        REG_WRITE(ah, AR_PHY_ERR, phybits);

        if (phybits)
                REG_SET_BIT(ah, AR_RXCFG, AR_RXCFG_ZLFDMA);
        else
                REG_CLR_BIT(ah, AR_RXCFG, AR_RXCFG_ZLFDMA);

        REGWRITE_BUFFER_FLUSH(ah);
}

int ath9k_hw_phy_disable(struct ath_hw *ah)
{
        if (!ath9k_hw_set_reset_reg(ah, ATH9K_RESET_WARM))
                return 0;

        ath9k_hw_init_pll(ah, NULL);
        return 1;
}

int ath9k_hw_disable(struct ath_hw *ah)
{
        if (!ath9k_hw_setpower(ah, ATH9K_PM_AWAKE))
                return 0;

        if (!ath9k_hw_set_reset_reg(ah, ATH9K_RESET_COLD))
                return 0;

        ath9k_hw_init_pll(ah, NULL);
        return 1;
}

void ath9k_hw_set_txpowerlimit(struct ath_hw *ah, u32 limit, int test)
{
        struct ath_regulatory *regulatory = ath9k_hw_regulatory(ah);
        struct ath9k_channel *chan = ah->curchan;
        struct net80211_channel *channel = chan->chan;

        regulatory->power_limit = min(limit, (u32) MAX_RATE_POWER);

        ah->eep_ops->set_txpower(ah, chan,
                                 ath9k_regd_get_ctl(regulatory, chan),
                                 0,
                                 channel->maxpower * 2,
                                 min((u32) MAX_RATE_POWER,
                                 (u32) regulatory->power_limit), test);
}

void ath9k_hw_setopmode(struct ath_hw *ah)
{
        ath9k_hw_set_operating_mode(ah);
}

void ath9k_hw_setmcastfilter(struct ath_hw *ah, u32 filter0, u32 filter1)
{
        REG_WRITE(ah, AR_MCAST_FIL0, filter0);
        REG_WRITE(ah, AR_MCAST_FIL1, filter1);
}

void ath9k_hw_write_associd(struct ath_hw *ah)
{
        struct ath_common *common = ath9k_hw_common(ah);

        REG_WRITE(ah, AR_BSS_ID0, get_unaligned_le32(common->curbssid));
        REG_WRITE(ah, AR_BSS_ID1, get_unaligned_le16(common->curbssid + 4) |
                  ((common->curaid & 0x3fff) << AR_BSS_ID1_AID_S));
}

void ath9k_hw_set11nmac2040(struct ath_hw *ah)
{
        u32 macmode;

        macmode = 0;

        REG_WRITE(ah, AR_2040_MODE, macmode);
}

static struct {
        u32 version;
        const char * name;
} ath_mac_bb_names[] = {
        /* Devices with external radios */
        { AR_SREV_VERSION_5416_PCI,     "5416" },
        { AR_SREV_VERSION_5416_PCIE,    "5418" },
        { AR_SREV_VERSION_9100,         "9100" },
        { AR_SREV_VERSION_9160,         "9160" },
        /* Single-chip solutions */
        { AR_SREV_VERSION_9280,         "9280" },
        { AR_SREV_VERSION_9285,         "9285" },
        { AR_SREV_VERSION_9287,         "9287" },
        { AR_SREV_VERSION_9271,         "9271" },
        { AR_SREV_VERSION_9300,         "9300" },
        { AR_SREV_VERSION_9485,         "9485" },
};

/* For devices with external radios */
static struct {
        u16 version;
        const char * name;
} ath_rf_names[] = {
        { 0,                            "5133" },
        { AR_RAD5133_SREV_MAJOR,        "5133" },
        { AR_RAD5122_SREV_MAJOR,        "5122" },
        { AR_RAD2133_SREV_MAJOR,        "2133" },
        { AR_RAD2122_SREV_MAJOR,        "2122" }
};

/*
 * Return the MAC/BB name. "????" is returned if the MAC/BB is unknown.
 */
static const char *ath9k_hw_mac_bb_name(u32 mac_bb_version)
{
        unsigned int i;

        for (i=0; i<ARRAY_SIZE(ath_mac_bb_names); i++) {
                if (ath_mac_bb_names[i].version == mac_bb_version) {
                        return ath_mac_bb_names[i].name;
                }
        }

        return "????";
}

/*
 * Return the RF name. "????" is returned if the RF is unknown.
 * Used for devices with external radios.
 */
static const char *ath9k_hw_rf_name(u16 rf_version)
{
        unsigned int i;

        for (i=0; i<ARRAY_SIZE(ath_rf_names); i++) {
                if (ath_rf_names[i].version == rf_version) {
                        return ath_rf_names[i].name;
                }
        }

        return "????";
}

void ath9k_hw_name(struct ath_hw *ah, char *hw_name, size_t len)
{
        int used;

        /* chipsets >= AR9280 are single-chip */
        if (AR_SREV_9280_20_OR_LATER(ah)) {
                used = snprintf(hw_name, len,
                               "Atheros AR%s Rev:%x",
                               ath9k_hw_mac_bb_name(ah->hw_version.macVersion),
                               ah->hw_version.macRev);
        }
        else {
                used = snprintf(hw_name, len,
                               "Atheros AR%s MAC/BB Rev:%x AR%s RF Rev:%x",
                               ath9k_hw_mac_bb_name(ah->hw_version.macVersion),
                               ah->hw_version.macRev,
                               ath9k_hw_rf_name((ah->hw_version.analog5GhzRev &
                                                AR_RADIO_SREV_MAJOR)),
                               ah->hw_version.phyRev);
        }

        hw_name[used] = '\0';
}