ath9k_ar9002_phy.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 );

/**
 * DOC: Programming Atheros 802.11n analog front end radios
 *
 * AR5416 MAC based PCI devices and AR518 MAC based PCI-Express
 * devices have either an external AR2133 analog front end radio for single
 * band 2.4 GHz communication or an AR5133 analog front end radio for dual
 * band 2.4 GHz / 5 GHz communication.
 *
 * All devices after the AR5416 and AR5418 family starting with the AR9280
 * have their analog front radios, MAC/BB and host PCIe/USB interface embedded
 * into a single-chip and require less programming.
 *
 * The following single-chips exist with a respective embedded radio:
 *
 * AR9280 - 11n dual-band 2x2 MIMO for PCIe
 * AR9281 - 11n single-band 1x2 MIMO for PCIe
 * AR9285 - 11n single-band 1x1 for PCIe
 * AR9287 - 11n single-band 2x2 MIMO for PCIe
 *
 * AR9220 - 11n dual-band 2x2 MIMO for PCI
 * AR9223 - 11n single-band 2x2 MIMO for PCI
 *
 * AR9287 - 11n single-band 1x1 MIMO for USB
 */

#include <ipxe/io.h>

#include "hw.h"
#include "ar9002_phy.h"

/**
 * ar9002_hw_set_channel - set channel on single-chip device
 * @ah: atheros hardware structure
 * @chan:
 *
 * This is the function to change channel on single-chip devices, that is
 * all devices after ar9280.
 *
 * This function takes the channel value in MHz and sets
 * hardware channel value. Assumes writes have been enabled to analog bus.
 *
 * Actual Expression,
 *
 * For 2GHz channel,
 * Channel Frequency = (3/4) * freq_ref * (chansel[8:0] + chanfrac[16:0]/2^17)
 * (freq_ref = 40MHz)
 *
 * For 5GHz channel,
 * Channel Frequency = (3/2) * freq_ref * (chansel[8:0] + chanfrac[16:0]/2^10)
 * (freq_ref = 40MHz/(24>>amodeRefSel))
 */
static int ar9002_hw_set_channel(struct ath_hw *ah, struct ath9k_channel *chan)
{
        u16 bMode, fracMode, aModeRefSel = 0;
        u32 freq, ndiv, channelSel = 0, channelFrac = 0, reg32 = 0;
        struct chan_centers centers;
        u32 refDivA = 24;

        ath9k_hw_get_channel_centers(ah, chan, &centers);
        freq = centers.synth_center;

        reg32 = REG_READ(ah, AR_PHY_SYNTH_CONTROL);
        reg32 &= 0xc0000000;

        if (freq < 4800) { /* 2 GHz, fractional mode */
                u32 txctl;
                unsigned int regWrites = 0;

                bMode = 1;
                fracMode = 1;
                aModeRefSel = 0;
                channelSel = CHANSEL_2G(freq);

                if (AR_SREV_9287_11_OR_LATER(ah)) {
                        if (freq == 2484) {
                                /* Enable channel spreading for channel 14 */
                                REG_WRITE_ARRAY(&ah->iniCckfirJapan2484,
                                                1, regWrites);
                        } else {
                                REG_WRITE_ARRAY(&ah->iniCckfirNormal,
                                                1, regWrites);
                        }
                } else {
                        txctl = REG_READ(ah, AR_PHY_CCK_TX_CTRL);
                        if (freq == 2484) {
                                /* Enable channel spreading for channel 14 */
                                REG_WRITE(ah, AR_PHY_CCK_TX_CTRL,
                                          txctl | AR_PHY_CCK_TX_CTRL_JAPAN);
                        } else {
                                REG_WRITE(ah, AR_PHY_CCK_TX_CTRL,
                                          txctl & ~AR_PHY_CCK_TX_CTRL_JAPAN);
                        }
                }
        } else {
                bMode = 0;
                fracMode = 0;

                switch (ah->eep_ops->get_eeprom(ah, EEP_FRAC_N_5G)) {
                case 0:
                        if ((freq % 20) == 0)
                                aModeRefSel = 3;
                        else if ((freq % 10) == 0)
                                aModeRefSel = 2;
                        if (aModeRefSel)
                                break;
                        /* Fall through */
                case 1:
                default:
                        aModeRefSel = 0;
                        /*
                         * Enable 2G (fractional) mode for channels
                         * which are 5MHz spaced.
                         */
                        fracMode = 1;
                        refDivA = 1;
                        channelSel = CHANSEL_5G(freq);

                        /* RefDivA setting */
                        REG_RMW_FIELD(ah, AR_AN_SYNTH9,
                                      AR_AN_SYNTH9_REFDIVA, refDivA);

                }

                if (!fracMode) {
                        ndiv = (freq * (refDivA >> aModeRefSel)) / 60;
                        channelSel = ndiv & 0x1ff;
                        channelFrac = (ndiv & 0xfffffe00) * 2;
                        channelSel = (channelSel << 17) | channelFrac;
                }
        }

        reg32 = reg32 |
            (bMode << 29) |
            (fracMode << 28) | (aModeRefSel << 26) | (channelSel);

        REG_WRITE(ah, AR_PHY_SYNTH_CONTROL, reg32);

        ah->curchan = chan;
        ah->curchan_rad_index = -1;

        return 0;
}

/**
 * ar9002_hw_spur_mitigate - convert baseband spur frequency
 * @ah: atheros hardware structure
 * @chan:
 *
 * For single-chip solutions. Converts to baseband spur frequency given the
 * input channel frequency and compute register settings below.
 */
static void ar9002_hw_spur_mitigate(struct ath_hw *ah,
                                    struct ath9k_channel *chan)
{
        int bb_spur = AR_NO_SPUR;
        int freq;
        int bin, cur_bin;
        int bb_spur_off, spur_subchannel_sd;
        int spur_freq_sd;
        int spur_delta_phase;
        int denominator;
        int upper, lower, cur_vit_mask;
        int tmp, newVal;
        int i;
        static const int pilot_mask_reg[4] = {
                AR_PHY_TIMING7, AR_PHY_TIMING8,
                AR_PHY_PILOT_MASK_01_30, AR_PHY_PILOT_MASK_31_60
        };
        static const int chan_mask_reg[4] = {
                AR_PHY_TIMING9, AR_PHY_TIMING10,
                AR_PHY_CHANNEL_MASK_01_30, AR_PHY_CHANNEL_MASK_31_60
        };
        static const int inc[4] = { 0, 100, 0, 0 };
        struct chan_centers centers;

        int8_t mask_m[123];
        int8_t mask_p[123];
        int8_t mask_amt;
        int tmp_mask;
        int cur_bb_spur;
        int is2GHz = IS_CHAN_2GHZ(chan);

        memset(&mask_m, 0, sizeof(int8_t) * 123);
        memset(&mask_p, 0, sizeof(int8_t) * 123);

        ath9k_hw_get_channel_centers(ah, chan, &centers);
        freq = centers.synth_center;

        ah->config.spurmode = SPUR_ENABLE_EEPROM;
        for (i = 0; i < AR_EEPROM_MODAL_SPURS; i++) {
                cur_bb_spur = ah->eep_ops->get_spur_channel(ah, i, is2GHz);

                if (AR_NO_SPUR == cur_bb_spur)
                        break;

                if (is2GHz)
                        cur_bb_spur = (cur_bb_spur / 10) + AR_BASE_FREQ_2GHZ;
                else
                        cur_bb_spur = (cur_bb_spur / 10) + AR_BASE_FREQ_5GHZ;

                cur_bb_spur = cur_bb_spur - freq;

                if (IS_CHAN_HT40(chan)) {
                        if ((cur_bb_spur > -AR_SPUR_FEEQ_BOUND_HT40) &&
                            (cur_bb_spur < AR_SPUR_FEEQ_BOUND_HT40)) {
                                bb_spur = cur_bb_spur;
                                break;
                        }
                } else if ((cur_bb_spur > -AR_SPUR_FEEQ_BOUND_HT20) &&
                           (cur_bb_spur < AR_SPUR_FEEQ_BOUND_HT20)) {
                        bb_spur = cur_bb_spur;
                        break;
                }
        }

        if (AR_NO_SPUR == bb_spur) {
                REG_CLR_BIT(ah, AR_PHY_FORCE_CLKEN_CCK,
                            AR_PHY_FORCE_CLKEN_CCK_MRC_MUX);
                return;
        } else {
                REG_CLR_BIT(ah, AR_PHY_FORCE_CLKEN_CCK,
                            AR_PHY_FORCE_CLKEN_CCK_MRC_MUX);
        }

        bin = bb_spur * 320;

        tmp = REG_READ(ah, AR_PHY_TIMING_CTRL4(0));

        ENABLE_REGWRITE_BUFFER(ah);

        newVal = tmp | (AR_PHY_TIMING_CTRL4_ENABLE_SPUR_RSSI |
                        AR_PHY_TIMING_CTRL4_ENABLE_SPUR_FILTER |
                        AR_PHY_TIMING_CTRL4_ENABLE_CHAN_MASK |
                        AR_PHY_TIMING_CTRL4_ENABLE_PILOT_MASK);
        REG_WRITE(ah, AR_PHY_TIMING_CTRL4(0), newVal);

        newVal = (AR_PHY_SPUR_REG_MASK_RATE_CNTL |
                  AR_PHY_SPUR_REG_ENABLE_MASK_PPM |
                  AR_PHY_SPUR_REG_MASK_RATE_SELECT |
                  AR_PHY_SPUR_REG_ENABLE_VIT_SPUR_RSSI |
                  SM(SPUR_RSSI_THRESH, AR_PHY_SPUR_REG_SPUR_RSSI_THRESH));
        REG_WRITE(ah, AR_PHY_SPUR_REG, newVal);

        if (IS_CHAN_HT40(chan)) {
                if (bb_spur < 0) {
                        spur_subchannel_sd = 1;
                        bb_spur_off = bb_spur + 10;
                } else {
                        spur_subchannel_sd = 0;
                        bb_spur_off = bb_spur - 10;
                }
        } else {
                spur_subchannel_sd = 0;
                bb_spur_off = bb_spur;
        }

        if (IS_CHAN_HT40(chan))
                spur_delta_phase =
                        ((bb_spur * 262144) /
                         10) & AR_PHY_TIMING11_SPUR_DELTA_PHASE;
        else
                spur_delta_phase =
                        ((bb_spur * 524288) /
                         10) & AR_PHY_TIMING11_SPUR_DELTA_PHASE;

        denominator = IS_CHAN_2GHZ(chan) ? 44 : 40;
        spur_freq_sd = ((bb_spur_off * 2048) / denominator) & 0x3ff;

        newVal = (AR_PHY_TIMING11_USE_SPUR_IN_AGC |
                  SM(spur_freq_sd, AR_PHY_TIMING11_SPUR_FREQ_SD) |
                  SM(spur_delta_phase, AR_PHY_TIMING11_SPUR_DELTA_PHASE));
        REG_WRITE(ah, AR_PHY_TIMING11, newVal);

        newVal = spur_subchannel_sd << AR_PHY_SFCORR_SPUR_SUBCHNL_SD_S;
        REG_WRITE(ah, AR_PHY_SFCORR_EXT, newVal);

        cur_bin = -6000;
        upper = bin + 100;
        lower = bin - 100;

        for (i = 0; i < 4; i++) {
                int pilot_mask = 0;
                int chan_mask = 0;
                int bp = 0;
                for (bp = 0; bp < 30; bp++) {
                        if ((cur_bin > lower) && (cur_bin < upper)) {
                                pilot_mask = pilot_mask | 0x1 << bp;
                                chan_mask = chan_mask | 0x1 << bp;
                        }
                        cur_bin += 100;
                }
                cur_bin += inc[i];
                REG_WRITE(ah, pilot_mask_reg[i], pilot_mask);
                REG_WRITE(ah, chan_mask_reg[i], chan_mask);
        }

        cur_vit_mask = 6100;
        upper = bin + 120;
        lower = bin - 120;

        for (i = 0; i < 123; i++) {
                if ((cur_vit_mask > lower) && (cur_vit_mask < upper)) {

                        /* workaround for gcc bug #37014 */
                        volatile int tmp_v = abs(cur_vit_mask - bin);

                        if (tmp_v < 75)
                                mask_amt = 1;
                        else
                                mask_amt = 0;
                        if (cur_vit_mask < 0)
                                mask_m[abs(cur_vit_mask / 100)] = mask_amt;
                        else
                                mask_p[cur_vit_mask / 100] = mask_amt;
                }
                cur_vit_mask -= 100;
        }

        tmp_mask = (mask_m[46] << 30) | (mask_m[47] << 28)
                | (mask_m[48] << 26) | (mask_m[49] << 24)
                | (mask_m[50] << 22) | (mask_m[51] << 20)
                | (mask_m[52] << 18) | (mask_m[53] << 16)
                | (mask_m[54] << 14) | (mask_m[55] << 12)
                | (mask_m[56] << 10) | (mask_m[57] << 8)
                | (mask_m[58] << 6) | (mask_m[59] << 4)
                | (mask_m[60] << 2) | (mask_m[61] << 0);
        REG_WRITE(ah, AR_PHY_BIN_MASK_1, tmp_mask);
        REG_WRITE(ah, AR_PHY_VIT_MASK2_M_46_61, tmp_mask);

        tmp_mask = (mask_m[31] << 28)
                | (mask_m[32] << 26) | (mask_m[33] << 24)
                | (mask_m[34] << 22) | (mask_m[35] << 20)
                | (mask_m[36] << 18) | (mask_m[37] << 16)
                | (mask_m[48] << 14) | (mask_m[39] << 12)
                | (mask_m[40] << 10) | (mask_m[41] << 8)
                | (mask_m[42] << 6) | (mask_m[43] << 4)
                | (mask_m[44] << 2) | (mask_m[45] << 0);
        REG_WRITE(ah, AR_PHY_BIN_MASK_2, tmp_mask);
        REG_WRITE(ah, AR_PHY_MASK2_M_31_45, tmp_mask);

        tmp_mask = (mask_m[16] << 30) | (mask_m[16] << 28)
                | (mask_m[18] << 26) | (mask_m[18] << 24)
                | (mask_m[20] << 22) | (mask_m[20] << 20)
                | (mask_m[22] << 18) | (mask_m[22] << 16)
                | (mask_m[24] << 14) | (mask_m[24] << 12)
                | (mask_m[25] << 10) | (mask_m[26] << 8)
                | (mask_m[27] << 6) | (mask_m[28] << 4)
                | (mask_m[29] << 2) | (mask_m[30] << 0);
        REG_WRITE(ah, AR_PHY_BIN_MASK_3, tmp_mask);
        REG_WRITE(ah, AR_PHY_MASK2_M_16_30, tmp_mask);

        tmp_mask = (mask_m[0] << 30) | (mask_m[1] << 28)
                | (mask_m[2] << 26) | (mask_m[3] << 24)
                | (mask_m[4] << 22) | (mask_m[5] << 20)
                | (mask_m[6] << 18) | (mask_m[7] << 16)
                | (mask_m[8] << 14) | (mask_m[9] << 12)
                | (mask_m[10] << 10) | (mask_m[11] << 8)
                | (mask_m[12] << 6) | (mask_m[13] << 4)
                | (mask_m[14] << 2) | (mask_m[15] << 0);
        REG_WRITE(ah, AR_PHY_MASK_CTL, tmp_mask);
        REG_WRITE(ah, AR_PHY_MASK2_M_00_15, tmp_mask);

        tmp_mask = (mask_p[15] << 28)
                | (mask_p[14] << 26) | (mask_p[13] << 24)
                | (mask_p[12] << 22) | (mask_p[11] << 20)
                | (mask_p[10] << 18) | (mask_p[9] << 16)
                | (mask_p[8] << 14) | (mask_p[7] << 12)
                | (mask_p[6] << 10) | (mask_p[5] << 8)
                | (mask_p[4] << 6) | (mask_p[3] << 4)
                | (mask_p[2] << 2) | (mask_p[1] << 0);
        REG_WRITE(ah, AR_PHY_BIN_MASK2_1, tmp_mask);
        REG_WRITE(ah, AR_PHY_MASK2_P_15_01, tmp_mask);

        tmp_mask = (mask_p[30] << 28)
                | (mask_p[29] << 26) | (mask_p[28] << 24)
                | (mask_p[27] << 22) | (mask_p[26] << 20)
                | (mask_p[25] << 18) | (mask_p[24] << 16)
                | (mask_p[23] << 14) | (mask_p[22] << 12)
                | (mask_p[21] << 10) | (mask_p[20] << 8)
                | (mask_p[19] << 6) | (mask_p[18] << 4)
                | (mask_p[17] << 2) | (mask_p[16] << 0);
        REG_WRITE(ah, AR_PHY_BIN_MASK2_2, tmp_mask);
        REG_WRITE(ah, AR_PHY_MASK2_P_30_16, tmp_mask);

        tmp_mask = (mask_p[45] << 28)
                | (mask_p[44] << 26) | (mask_p[43] << 24)
                | (mask_p[42] << 22) | (mask_p[41] << 20)
                | (mask_p[40] << 18) | (mask_p[39] << 16)
                | (mask_p[38] << 14) | (mask_p[37] << 12)
                | (mask_p[36] << 10) | (mask_p[35] << 8)
                | (mask_p[34] << 6) | (mask_p[33] << 4)
                | (mask_p[32] << 2) | (mask_p[31] << 0);
        REG_WRITE(ah, AR_PHY_BIN_MASK2_3, tmp_mask);
        REG_WRITE(ah, AR_PHY_MASK2_P_45_31, tmp_mask);

        tmp_mask = (mask_p[61] << 30) | (mask_p[60] << 28)
                | (mask_p[59] << 26) | (mask_p[58] << 24)
                | (mask_p[57] << 22) | (mask_p[56] << 20)
                | (mask_p[55] << 18) | (mask_p[54] << 16)
                | (mask_p[53] << 14) | (mask_p[52] << 12)
                | (mask_p[51] << 10) | (mask_p[50] << 8)
                | (mask_p[49] << 6) | (mask_p[48] << 4)
                | (mask_p[47] << 2) | (mask_p[46] << 0);
        REG_WRITE(ah, AR_PHY_BIN_MASK2_4, tmp_mask);
        REG_WRITE(ah, AR_PHY_MASK2_P_61_45, tmp_mask);

        REGWRITE_BUFFER_FLUSH(ah);
}

static void ar9002_olc_init(struct ath_hw *ah)
{
        u32 i;

        if (!OLC_FOR_AR9280_20_LATER)
                return;

        if (OLC_FOR_AR9287_10_LATER) {
                REG_SET_BIT(ah, AR_PHY_TX_PWRCTRL9,
                                AR_PHY_TX_PWRCTRL9_RES_DC_REMOVAL);
                ath9k_hw_analog_shift_rmw(ah, AR9287_AN_TXPC0,
                                AR9287_AN_TXPC0_TXPCMODE,
                                AR9287_AN_TXPC0_TXPCMODE_S,
                                AR9287_AN_TXPC0_TXPCMODE_TEMPSENSE);
                udelay(100);
        } else {
                for (i = 0; i < AR9280_TX_GAIN_TABLE_SIZE; i++)
                        ah->originalGain[i] =
                                MS(REG_READ(ah, AR_PHY_TX_GAIN_TBL1 + i * 4),
                                                AR_PHY_TX_GAIN);
                ah->PDADCdelta = 0;
        }
}

static u32 ar9002_hw_compute_pll_control(struct ath_hw *ah,
                                         struct ath9k_channel *chan)
{
        u32 pll;

        pll = SM(0x5, AR_RTC_9160_PLL_REFDIV);

        if (chan && IS_CHAN_HALF_RATE(chan))
                pll |= SM(0x1, AR_RTC_9160_PLL_CLKSEL);
        else if (chan && IS_CHAN_QUARTER_RATE(chan))
                pll |= SM(0x2, AR_RTC_9160_PLL_CLKSEL);

        if (chan && IS_CHAN_5GHZ(chan)) {
                if (IS_CHAN_A_FAST_CLOCK(ah, chan))
                        pll = 0x142c;
                else if (AR_SREV_9280_20(ah))
                        pll = 0x2850;
                else
                        pll |= SM(0x28, AR_RTC_9160_PLL_DIV);
        } else {
                pll |= SM(0x2c, AR_RTC_9160_PLL_DIV);
        }

        return pll;
}

static void ar9002_hw_do_getnf(struct ath_hw *ah,
                              int16_t nfarray[NUM_NF_READINGS])
{
        int16_t nf;

        nf = MS(REG_READ(ah, AR_PHY_CCA), AR9280_PHY_MINCCA_PWR);
        nfarray[0] = sign_extend32(nf, 8);

        nf = MS(REG_READ(ah, AR_PHY_EXT_CCA), AR9280_PHY_EXT_MINCCA_PWR);
        if (IS_CHAN_HT40(ah->curchan))
                nfarray[3] = sign_extend32(nf, 8);

        if (AR_SREV_9285(ah) || AR_SREV_9271(ah))
                return;

        nf = MS(REG_READ(ah, AR_PHY_CH1_CCA), AR9280_PHY_CH1_MINCCA_PWR);
        nfarray[1] = sign_extend32(nf, 8);

        nf = MS(REG_READ(ah, AR_PHY_CH1_EXT_CCA), AR9280_PHY_CH1_EXT_MINCCA_PWR);
        if (IS_CHAN_HT40(ah->curchan))
                nfarray[4] = sign_extend32(nf, 8);
}

static void ar9002_hw_set_nf_limits(struct ath_hw *ah)
{
        if (AR_SREV_9285(ah)) {
                ah->nf_2g.max = AR_PHY_CCA_MAX_GOOD_VAL_9285_2GHZ;
                ah->nf_2g.min = AR_PHY_CCA_MIN_GOOD_VAL_9285_2GHZ;
                ah->nf_2g.nominal = AR_PHY_CCA_NOM_VAL_9285_2GHZ;
        } else if (AR_SREV_9287(ah)) {
                ah->nf_2g.max = AR_PHY_CCA_MAX_GOOD_VAL_9287_2GHZ;
                ah->nf_2g.min = AR_PHY_CCA_MIN_GOOD_VAL_9287_2GHZ;
                ah->nf_2g.nominal = AR_PHY_CCA_NOM_VAL_9287_2GHZ;
        } else if (AR_SREV_9271(ah)) {
                ah->nf_2g.max = AR_PHY_CCA_MAX_GOOD_VAL_9271_2GHZ;
                ah->nf_2g.min = AR_PHY_CCA_MIN_GOOD_VAL_9271_2GHZ;
                ah->nf_2g.nominal = AR_PHY_CCA_NOM_VAL_9271_2GHZ;
        } else {
                ah->nf_2g.max = AR_PHY_CCA_MAX_GOOD_VAL_9280_2GHZ;
                ah->nf_2g.min = AR_PHY_CCA_MIN_GOOD_VAL_9280_2GHZ;
                ah->nf_2g.nominal = AR_PHY_CCA_NOM_VAL_9280_2GHZ;
                ah->nf_5g.max = AR_PHY_CCA_MAX_GOOD_VAL_9280_5GHZ;
                ah->nf_5g.min = AR_PHY_CCA_MIN_GOOD_VAL_9280_5GHZ;
                ah->nf_5g.nominal = AR_PHY_CCA_NOM_VAL_9280_5GHZ;
        }
}

static void ar9002_hw_antdiv_comb_conf_get(struct ath_hw *ah,
                                   struct ath_hw_antcomb_conf *antconf)
{
        u32 regval;

        regval = REG_READ(ah, AR_PHY_MULTICHAIN_GAIN_CTL);
        antconf->main_lna_conf = (regval & AR_PHY_9285_ANT_DIV_MAIN_LNACONF) >>
                                  AR_PHY_9285_ANT_DIV_MAIN_LNACONF_S;
        antconf->alt_lna_conf = (regval & AR_PHY_9285_ANT_DIV_ALT_LNACONF) >>
                                 AR_PHY_9285_ANT_DIV_ALT_LNACONF_S;
        antconf->fast_div_bias = (regval & AR_PHY_9285_FAST_DIV_BIAS) >>
                                  AR_PHY_9285_FAST_DIV_BIAS_S;
        antconf->lna1_lna2_delta = -3;
        antconf->div_group = 0;
}

static void ar9002_hw_antdiv_comb_conf_set(struct ath_hw *ah,
                                   struct ath_hw_antcomb_conf *antconf)
{
        u32 regval;

        regval = REG_READ(ah, AR_PHY_MULTICHAIN_GAIN_CTL);
        regval &= ~(AR_PHY_9285_ANT_DIV_MAIN_LNACONF |
                    AR_PHY_9285_ANT_DIV_ALT_LNACONF |
                    AR_PHY_9285_FAST_DIV_BIAS);
        regval |= ((antconf->main_lna_conf << AR_PHY_9285_ANT_DIV_MAIN_LNACONF_S)
                   & AR_PHY_9285_ANT_DIV_MAIN_LNACONF);
        regval |= ((antconf->alt_lna_conf << AR_PHY_9285_ANT_DIV_ALT_LNACONF_S)
                   & AR_PHY_9285_ANT_DIV_ALT_LNACONF);
        regval |= ((antconf->fast_div_bias << AR_PHY_9285_FAST_DIV_BIAS_S)
                   & AR_PHY_9285_FAST_DIV_BIAS);

        REG_WRITE(ah, AR_PHY_MULTICHAIN_GAIN_CTL, regval);
}

void ar9002_hw_attach_phy_ops(struct ath_hw *ah)
{
        struct ath_hw_private_ops *priv_ops = ath9k_hw_private_ops(ah);
        struct ath_hw_ops *ops = ath9k_hw_ops(ah);

        priv_ops->set_rf_regs = NULL;
        priv_ops->rf_alloc_ext_banks = NULL;
        priv_ops->rf_free_ext_banks = NULL;
        priv_ops->rf_set_freq = ar9002_hw_set_channel;
        priv_ops->spur_mitigate_freq = ar9002_hw_spur_mitigate;
        priv_ops->olc_init = ar9002_olc_init;
        priv_ops->compute_pll_control = ar9002_hw_compute_pll_control;
        priv_ops->do_getnf = ar9002_hw_do_getnf;

        ops->antdiv_comb_conf_get = ar9002_hw_antdiv_comb_conf_get;
        ops->antdiv_comb_conf_set = ar9002_hw_antdiv_comb_conf_set;

        ar9002_hw_set_nf_limits(ah);
}