linux/drivers/net/wireless/ath/ath9k/ar9002_phy.c
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   1/*
   2 * Copyright (c) 2008-2011 Atheros Communications Inc.
   3 *
   4 * Permission to use, copy, modify, and/or distribute this software for any
   5 * purpose with or without fee is hereby granted, provided that the above
   6 * copyright notice and this permission notice appear in all copies.
   7 *
   8 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
   9 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
  10 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
  11 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
  12 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
  13 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
  14 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  15 */
  16
  17/**
  18 * DOC: Programming Atheros 802.11n analog front end radios
  19 *
  20 * AR5416 MAC based PCI devices and AR518 MAC based PCI-Express
  21 * devices have either an external AR2133 analog front end radio for single
  22 * band 2.4 GHz communication or an AR5133 analog front end radio for dual
  23 * band 2.4 GHz / 5 GHz communication.
  24 *
  25 * All devices after the AR5416 and AR5418 family starting with the AR9280
  26 * have their analog front radios, MAC/BB and host PCIe/USB interface embedded
  27 * into a single-chip and require less programming.
  28 *
  29 * The following single-chips exist with a respective embedded radio:
  30 *
  31 * AR9280 - 11n dual-band 2x2 MIMO for PCIe
  32 * AR9281 - 11n single-band 1x2 MIMO for PCIe
  33 * AR9285 - 11n single-band 1x1 for PCIe
  34 * AR9287 - 11n single-band 2x2 MIMO for PCIe
  35 *
  36 * AR9220 - 11n dual-band 2x2 MIMO for PCI
  37 * AR9223 - 11n single-band 2x2 MIMO for PCI
  38 *
  39 * AR9287 - 11n single-band 1x1 MIMO for USB
  40 */
  41
  42#include "hw.h"
  43#include "ar9002_phy.h"
  44
  45/**
  46 * ar9002_hw_set_channel - set channel on single-chip device
  47 * @ah: atheros hardware structure
  48 * @chan:
  49 *
  50 * This is the function to change channel on single-chip devices, that is
  51 * all devices after ar9280.
  52 *
  53 * This function takes the channel value in MHz and sets
  54 * hardware channel value. Assumes writes have been enabled to analog bus.
  55 *
  56 * Actual Expression,
  57 *
  58 * For 2GHz channel,
  59 * Channel Frequency = (3/4) * freq_ref * (chansel[8:0] + chanfrac[16:0]/2^17)
  60 * (freq_ref = 40MHz)
  61 *
  62 * For 5GHz channel,
  63 * Channel Frequency = (3/2) * freq_ref * (chansel[8:0] + chanfrac[16:0]/2^10)
  64 * (freq_ref = 40MHz/(24>>amodeRefSel))
  65 */
  66static int ar9002_hw_set_channel(struct ath_hw *ah, struct ath9k_channel *chan)
  67{
  68        u16 bMode, fracMode, aModeRefSel = 0;
  69        u32 freq, ndiv, channelSel = 0, channelFrac = 0, reg32 = 0;
  70        struct chan_centers centers;
  71        u32 refDivA = 24;
  72
  73        ath9k_hw_get_channel_centers(ah, chan, &centers);
  74        freq = centers.synth_center;
  75
  76        reg32 = REG_READ(ah, AR_PHY_SYNTH_CONTROL);
  77        reg32 &= 0xc0000000;
  78
  79        if (freq < 4800) { /* 2 GHz, fractional mode */
  80                u32 txctl;
  81                int regWrites = 0;
  82
  83                bMode = 1;
  84                fracMode = 1;
  85                aModeRefSel = 0;
  86                channelSel = CHANSEL_2G(freq);
  87
  88                if (AR_SREV_9287_11_OR_LATER(ah)) {
  89                        if (freq == 2484) {
  90                                /* Enable channel spreading for channel 14 */
  91                                REG_WRITE_ARRAY(&ah->iniCckfirJapan2484,
  92                                                1, regWrites);
  93                        } else {
  94                                REG_WRITE_ARRAY(&ah->iniCckfirNormal,
  95                                                1, regWrites);
  96                        }
  97                } else {
  98                        txctl = REG_READ(ah, AR_PHY_CCK_TX_CTRL);
  99                        if (freq == 2484) {
 100                                /* Enable channel spreading for channel 14 */
 101                                REG_WRITE(ah, AR_PHY_CCK_TX_CTRL,
 102                                          txctl | AR_PHY_CCK_TX_CTRL_JAPAN);
 103                        } else {
 104                                REG_WRITE(ah, AR_PHY_CCK_TX_CTRL,
 105                                          txctl & ~AR_PHY_CCK_TX_CTRL_JAPAN);
 106                        }
 107                }
 108        } else {
 109                bMode = 0;
 110                fracMode = 0;
 111
 112                switch (ah->eep_ops->get_eeprom(ah, EEP_FRAC_N_5G)) {
 113                case 0:
 114                        if (IS_CHAN_HALF_RATE(chan) || IS_CHAN_QUARTER_RATE(chan))
 115                                aModeRefSel = 0;
 116                        else if ((freq % 20) == 0)
 117                                aModeRefSel = 3;
 118                        else if ((freq % 10) == 0)
 119                                aModeRefSel = 2;
 120                        if (aModeRefSel)
 121                                break;
 122                        /* else: fall through */
 123                case 1:
 124                default:
 125                        aModeRefSel = 0;
 126                        /*
 127                         * Enable 2G (fractional) mode for channels
 128                         * which are 5MHz spaced.
 129                         */
 130                        fracMode = 1;
 131                        refDivA = 1;
 132                        channelSel = CHANSEL_5G(freq);
 133
 134                        /* RefDivA setting */
 135                        ath9k_hw_analog_shift_rmw(ah, AR_AN_SYNTH9,
 136                                      AR_AN_SYNTH9_REFDIVA,
 137                                      AR_AN_SYNTH9_REFDIVA_S, refDivA);
 138
 139                }
 140
 141                if (!fracMode) {
 142                        ndiv = (freq * (refDivA >> aModeRefSel)) / 60;
 143                        channelSel = ndiv & 0x1ff;
 144                        channelFrac = (ndiv & 0xfffffe00) * 2;
 145                        channelSel = (channelSel << 17) | channelFrac;
 146                }
 147        }
 148
 149        reg32 = reg32 |
 150            (bMode << 29) |
 151            (fracMode << 28) | (aModeRefSel << 26) | (channelSel);
 152
 153        REG_WRITE(ah, AR_PHY_SYNTH_CONTROL, reg32);
 154
 155        ah->curchan = chan;
 156
 157        return 0;
 158}
 159
 160/**
 161 * ar9002_hw_spur_mitigate - convert baseband spur frequency
 162 * @ah: atheros hardware structure
 163 * @chan:
 164 *
 165 * For single-chip solutions. Converts to baseband spur frequency given the
 166 * input channel frequency and compute register settings below.
 167 */
 168static void ar9002_hw_spur_mitigate(struct ath_hw *ah,
 169                                    struct ath9k_channel *chan)
 170{
 171        int bb_spur = AR_NO_SPUR;
 172        int freq;
 173        int bin;
 174        int bb_spur_off, spur_subchannel_sd;
 175        int spur_freq_sd;
 176        int spur_delta_phase;
 177        int denominator;
 178        int tmp, newVal;
 179        int i;
 180        struct chan_centers centers;
 181
 182        int cur_bb_spur;
 183        bool is2GHz = IS_CHAN_2GHZ(chan);
 184
 185        ath9k_hw_get_channel_centers(ah, chan, &centers);
 186        freq = centers.synth_center;
 187
 188        for (i = 0; i < AR_EEPROM_MODAL_SPURS; i++) {
 189                cur_bb_spur = ah->eep_ops->get_spur_channel(ah, i, is2GHz);
 190
 191                if (AR_NO_SPUR == cur_bb_spur)
 192                        break;
 193
 194                if (is2GHz)
 195                        cur_bb_spur = (cur_bb_spur / 10) + AR_BASE_FREQ_2GHZ;
 196                else
 197                        cur_bb_spur = (cur_bb_spur / 10) + AR_BASE_FREQ_5GHZ;
 198
 199                cur_bb_spur = cur_bb_spur - freq;
 200
 201                if (IS_CHAN_HT40(chan)) {
 202                        if ((cur_bb_spur > -AR_SPUR_FEEQ_BOUND_HT40) &&
 203                            (cur_bb_spur < AR_SPUR_FEEQ_BOUND_HT40)) {
 204                                bb_spur = cur_bb_spur;
 205                                break;
 206                        }
 207                } else if ((cur_bb_spur > -AR_SPUR_FEEQ_BOUND_HT20) &&
 208                           (cur_bb_spur < AR_SPUR_FEEQ_BOUND_HT20)) {
 209                        bb_spur = cur_bb_spur;
 210                        break;
 211                }
 212        }
 213
 214        if (AR_NO_SPUR == bb_spur) {
 215                REG_CLR_BIT(ah, AR_PHY_FORCE_CLKEN_CCK,
 216                            AR_PHY_FORCE_CLKEN_CCK_MRC_MUX);
 217                return;
 218        } else {
 219                REG_CLR_BIT(ah, AR_PHY_FORCE_CLKEN_CCK,
 220                            AR_PHY_FORCE_CLKEN_CCK_MRC_MUX);
 221        }
 222
 223        bin = bb_spur * 320;
 224
 225        tmp = REG_READ(ah, AR_PHY_TIMING_CTRL4(0));
 226
 227        ENABLE_REGWRITE_BUFFER(ah);
 228
 229        newVal = tmp | (AR_PHY_TIMING_CTRL4_ENABLE_SPUR_RSSI |
 230                        AR_PHY_TIMING_CTRL4_ENABLE_SPUR_FILTER |
 231                        AR_PHY_TIMING_CTRL4_ENABLE_CHAN_MASK |
 232                        AR_PHY_TIMING_CTRL4_ENABLE_PILOT_MASK);
 233        REG_WRITE(ah, AR_PHY_TIMING_CTRL4(0), newVal);
 234
 235        newVal = (AR_PHY_SPUR_REG_MASK_RATE_CNTL |
 236                  AR_PHY_SPUR_REG_ENABLE_MASK_PPM |
 237                  AR_PHY_SPUR_REG_MASK_RATE_SELECT |
 238                  AR_PHY_SPUR_REG_ENABLE_VIT_SPUR_RSSI |
 239                  SM(SPUR_RSSI_THRESH, AR_PHY_SPUR_REG_SPUR_RSSI_THRESH));
 240        REG_WRITE(ah, AR_PHY_SPUR_REG, newVal);
 241
 242        if (IS_CHAN_HT40(chan)) {
 243                if (bb_spur < 0) {
 244                        spur_subchannel_sd = 1;
 245                        bb_spur_off = bb_spur + 10;
 246                } else {
 247                        spur_subchannel_sd = 0;
 248                        bb_spur_off = bb_spur - 10;
 249                }
 250        } else {
 251                spur_subchannel_sd = 0;
 252                bb_spur_off = bb_spur;
 253        }
 254
 255        if (IS_CHAN_HT40(chan))
 256                spur_delta_phase =
 257                        ((bb_spur * 262144) /
 258                         10) & AR_PHY_TIMING11_SPUR_DELTA_PHASE;
 259        else
 260                spur_delta_phase =
 261                        ((bb_spur * 524288) /
 262                         10) & AR_PHY_TIMING11_SPUR_DELTA_PHASE;
 263
 264        denominator = IS_CHAN_2GHZ(chan) ? 44 : 40;
 265        spur_freq_sd = ((bb_spur_off * 2048) / denominator) & 0x3ff;
 266
 267        newVal = (AR_PHY_TIMING11_USE_SPUR_IN_AGC |
 268                  SM(spur_freq_sd, AR_PHY_TIMING11_SPUR_FREQ_SD) |
 269                  SM(spur_delta_phase, AR_PHY_TIMING11_SPUR_DELTA_PHASE));
 270        REG_WRITE(ah, AR_PHY_TIMING11, newVal);
 271
 272        newVal = spur_subchannel_sd << AR_PHY_SFCORR_SPUR_SUBCHNL_SD_S;
 273        REG_WRITE(ah, AR_PHY_SFCORR_EXT, newVal);
 274
 275        ar5008_hw_cmn_spur_mitigate(ah, chan, bin);
 276
 277        REGWRITE_BUFFER_FLUSH(ah);
 278}
 279
 280static void ar9002_olc_init(struct ath_hw *ah)
 281{
 282        u32 i;
 283
 284        if (!OLC_FOR_AR9280_20_LATER)
 285                return;
 286
 287        if (OLC_FOR_AR9287_10_LATER) {
 288                REG_SET_BIT(ah, AR_PHY_TX_PWRCTRL9,
 289                                AR_PHY_TX_PWRCTRL9_RES_DC_REMOVAL);
 290                ath9k_hw_analog_shift_rmw(ah, AR9287_AN_TXPC0,
 291                                AR9287_AN_TXPC0_TXPCMODE,
 292                                AR9287_AN_TXPC0_TXPCMODE_S,
 293                                AR9287_AN_TXPC0_TXPCMODE_TEMPSENSE);
 294                udelay(100);
 295        } else {
 296                for (i = 0; i < AR9280_TX_GAIN_TABLE_SIZE; i++)
 297                        ah->originalGain[i] =
 298                                MS(REG_READ(ah, AR_PHY_TX_GAIN_TBL1 + i * 4),
 299                                                AR_PHY_TX_GAIN);
 300                ah->PDADCdelta = 0;
 301        }
 302}
 303
 304static u32 ar9002_hw_compute_pll_control(struct ath_hw *ah,
 305                                         struct ath9k_channel *chan)
 306{
 307        int ref_div = 5;
 308        int pll_div = 0x2c;
 309        u32 pll;
 310
 311        if (chan && IS_CHAN_5GHZ(chan) && !IS_CHAN_A_FAST_CLOCK(ah, chan)) {
 312                if (AR_SREV_9280_20(ah)) {
 313                        ref_div = 10;
 314                        pll_div = 0x50;
 315                } else {
 316                        pll_div = 0x28;
 317                }
 318        }
 319
 320        pll = SM(ref_div, AR_RTC_9160_PLL_REFDIV);
 321        pll |= SM(pll_div, AR_RTC_9160_PLL_DIV);
 322
 323        if (chan && IS_CHAN_HALF_RATE(chan))
 324                pll |= SM(0x1, AR_RTC_9160_PLL_CLKSEL);
 325        else if (chan && IS_CHAN_QUARTER_RATE(chan))
 326                pll |= SM(0x2, AR_RTC_9160_PLL_CLKSEL);
 327
 328        return pll;
 329}
 330
 331static void ar9002_hw_do_getnf(struct ath_hw *ah,
 332                              int16_t nfarray[NUM_NF_READINGS])
 333{
 334        int16_t nf;
 335
 336        nf = MS(REG_READ(ah, AR_PHY_CCA), AR9280_PHY_MINCCA_PWR);
 337        nfarray[0] = sign_extend32(nf, 8);
 338
 339        nf = MS(REG_READ(ah, AR_PHY_EXT_CCA), AR9280_PHY_EXT_MINCCA_PWR);
 340        if (IS_CHAN_HT40(ah->curchan))
 341                nfarray[3] = sign_extend32(nf, 8);
 342
 343        if (!(ah->rxchainmask & BIT(1)))
 344                return;
 345
 346        nf = MS(REG_READ(ah, AR_PHY_CH1_CCA), AR9280_PHY_CH1_MINCCA_PWR);
 347        nfarray[1] = sign_extend32(nf, 8);
 348
 349        nf = MS(REG_READ(ah, AR_PHY_CH1_EXT_CCA), AR9280_PHY_CH1_EXT_MINCCA_PWR);
 350        if (IS_CHAN_HT40(ah->curchan))
 351                nfarray[4] = sign_extend32(nf, 8);
 352}
 353
 354static void ar9002_hw_set_nf_limits(struct ath_hw *ah)
 355{
 356        if (AR_SREV_9285(ah)) {
 357                ah->nf_2g.max = AR_PHY_CCA_MAX_GOOD_VAL_9285_2GHZ;
 358                ah->nf_2g.min = AR_PHY_CCA_MIN_GOOD_VAL_9285_2GHZ;
 359                ah->nf_2g.nominal = AR_PHY_CCA_NOM_VAL_9285_2GHZ;
 360        } else if (AR_SREV_9287(ah)) {
 361                ah->nf_2g.max = AR_PHY_CCA_MAX_GOOD_VAL_9287_2GHZ;
 362                ah->nf_2g.min = AR_PHY_CCA_MIN_GOOD_VAL_9287_2GHZ;
 363                ah->nf_2g.nominal = AR_PHY_CCA_NOM_VAL_9287_2GHZ;
 364        } else if (AR_SREV_9271(ah)) {
 365                ah->nf_2g.max = AR_PHY_CCA_MAX_GOOD_VAL_9271_2GHZ;
 366                ah->nf_2g.min = AR_PHY_CCA_MIN_GOOD_VAL_9271_2GHZ;
 367                ah->nf_2g.nominal = AR_PHY_CCA_NOM_VAL_9271_2GHZ;
 368        } else {
 369                ah->nf_2g.max = AR_PHY_CCA_MAX_GOOD_VAL_9280_2GHZ;
 370                ah->nf_2g.min = AR_PHY_CCA_MIN_GOOD_VAL_9280_2GHZ;
 371                ah->nf_2g.nominal = AR_PHY_CCA_NOM_VAL_9280_2GHZ;
 372                ah->nf_5g.max = AR_PHY_CCA_MAX_GOOD_VAL_9280_5GHZ;
 373                ah->nf_5g.min = AR_PHY_CCA_MIN_GOOD_VAL_9280_5GHZ;
 374                ah->nf_5g.nominal = AR_PHY_CCA_NOM_VAL_9280_5GHZ;
 375        }
 376}
 377
 378static void ar9002_hw_antdiv_comb_conf_get(struct ath_hw *ah,
 379                                   struct ath_hw_antcomb_conf *antconf)
 380{
 381        u32 regval;
 382
 383        regval = REG_READ(ah, AR_PHY_MULTICHAIN_GAIN_CTL);
 384        antconf->main_lna_conf = (regval & AR_PHY_9285_ANT_DIV_MAIN_LNACONF) >>
 385                                  AR_PHY_9285_ANT_DIV_MAIN_LNACONF_S;
 386        antconf->alt_lna_conf = (regval & AR_PHY_9285_ANT_DIV_ALT_LNACONF) >>
 387                                 AR_PHY_9285_ANT_DIV_ALT_LNACONF_S;
 388        antconf->fast_div_bias = (regval & AR_PHY_9285_FAST_DIV_BIAS) >>
 389                                  AR_PHY_9285_FAST_DIV_BIAS_S;
 390        antconf->lna1_lna2_switch_delta = -1;
 391        antconf->lna1_lna2_delta = -3;
 392        antconf->div_group = 0;
 393}
 394
 395static void ar9002_hw_antdiv_comb_conf_set(struct ath_hw *ah,
 396                                   struct ath_hw_antcomb_conf *antconf)
 397{
 398        u32 regval;
 399
 400        regval = REG_READ(ah, AR_PHY_MULTICHAIN_GAIN_CTL);
 401        regval &= ~(AR_PHY_9285_ANT_DIV_MAIN_LNACONF |
 402                    AR_PHY_9285_ANT_DIV_ALT_LNACONF |
 403                    AR_PHY_9285_FAST_DIV_BIAS);
 404        regval |= ((antconf->main_lna_conf << AR_PHY_9285_ANT_DIV_MAIN_LNACONF_S)
 405                   & AR_PHY_9285_ANT_DIV_MAIN_LNACONF);
 406        regval |= ((antconf->alt_lna_conf << AR_PHY_9285_ANT_DIV_ALT_LNACONF_S)
 407                   & AR_PHY_9285_ANT_DIV_ALT_LNACONF);
 408        regval |= ((antconf->fast_div_bias << AR_PHY_9285_FAST_DIV_BIAS_S)
 409                   & AR_PHY_9285_FAST_DIV_BIAS);
 410
 411        REG_WRITE(ah, AR_PHY_MULTICHAIN_GAIN_CTL, regval);
 412}
 413
 414#ifdef CONFIG_ATH9K_BTCOEX_SUPPORT
 415
 416static void ar9002_hw_set_bt_ant_diversity(struct ath_hw *ah, bool enable)
 417{
 418        struct ath_btcoex_hw *btcoex = &ah->btcoex_hw;
 419        u8 antdiv_ctrl1, antdiv_ctrl2;
 420        u32 regval;
 421
 422        if (enable) {
 423                antdiv_ctrl1 = ATH_BT_COEX_ANTDIV_CONTROL1_ENABLE;
 424                antdiv_ctrl2 = ATH_BT_COEX_ANTDIV_CONTROL2_ENABLE;
 425
 426                /*
 427                 * Don't disable BT ant to allow BB to control SWCOM.
 428                 */
 429                btcoex->bt_coex_mode2 &= (~(AR_BT_DISABLE_BT_ANT));
 430                REG_WRITE(ah, AR_BT_COEX_MODE2, btcoex->bt_coex_mode2);
 431
 432                REG_WRITE(ah, AR_PHY_SWITCH_COM, ATH_BT_COEX_ANT_DIV_SWITCH_COM);
 433                REG_RMW(ah, AR_PHY_SWITCH_CHAIN_0, 0, 0xf0000000);
 434        } else {
 435                /*
 436                 * Disable antenna diversity, use LNA1 only.
 437                 */
 438                antdiv_ctrl1 = ATH_BT_COEX_ANTDIV_CONTROL1_FIXED_A;
 439                antdiv_ctrl2 = ATH_BT_COEX_ANTDIV_CONTROL2_FIXED_A;
 440
 441                /*
 442                 * Disable BT Ant. to allow concurrent BT and WLAN receive.
 443                 */
 444                btcoex->bt_coex_mode2 |= AR_BT_DISABLE_BT_ANT;
 445                REG_WRITE(ah, AR_BT_COEX_MODE2, btcoex->bt_coex_mode2);
 446
 447                /*
 448                 * Program SWCOM table to make sure RF switch always parks
 449                 * at BT side.
 450                 */
 451                REG_WRITE(ah, AR_PHY_SWITCH_COM, 0);
 452                REG_RMW(ah, AR_PHY_SWITCH_CHAIN_0, 0, 0xf0000000);
 453        }
 454
 455        regval = REG_READ(ah, AR_PHY_MULTICHAIN_GAIN_CTL);
 456        regval &= (~(AR_PHY_9285_ANT_DIV_CTL_ALL));
 457        /*
 458         * Clear ant_fast_div_bias [14:9] since for WB195,
 459         * the main LNA is always LNA1.
 460         */
 461        regval &= (~(AR_PHY_9285_FAST_DIV_BIAS));
 462        regval |= SM(antdiv_ctrl1, AR_PHY_9285_ANT_DIV_CTL);
 463        regval |= SM(antdiv_ctrl2, AR_PHY_9285_ANT_DIV_ALT_LNACONF);
 464        regval |= SM((antdiv_ctrl2 >> 2), AR_PHY_9285_ANT_DIV_MAIN_LNACONF);
 465        regval |= SM((antdiv_ctrl1 >> 1), AR_PHY_9285_ANT_DIV_ALT_GAINTB);
 466        regval |= SM((antdiv_ctrl1 >> 2), AR_PHY_9285_ANT_DIV_MAIN_GAINTB);
 467        REG_WRITE(ah, AR_PHY_MULTICHAIN_GAIN_CTL, regval);
 468
 469        regval = REG_READ(ah, AR_PHY_CCK_DETECT);
 470        regval &= (~AR_PHY_CCK_DETECT_BB_ENABLE_ANT_FAST_DIV);
 471        regval |= SM((antdiv_ctrl1 >> 3), AR_PHY_CCK_DETECT_BB_ENABLE_ANT_FAST_DIV);
 472        REG_WRITE(ah, AR_PHY_CCK_DETECT, regval);
 473}
 474
 475#endif
 476
 477static void ar9002_hw_spectral_scan_config(struct ath_hw *ah,
 478                                    struct ath_spec_scan *param)
 479{
 480        u32 repeat_bit;
 481        u8 count;
 482
 483        if (!param->enabled) {
 484                REG_CLR_BIT(ah, AR_PHY_SPECTRAL_SCAN,
 485                            AR_PHY_SPECTRAL_SCAN_ENABLE);
 486                return;
 487        }
 488        REG_SET_BIT(ah, AR_PHY_RADAR_0, AR_PHY_RADAR_0_FFT_ENA);
 489        REG_SET_BIT(ah, AR_PHY_SPECTRAL_SCAN, AR_PHY_SPECTRAL_SCAN_ENABLE);
 490
 491        if (AR_SREV_9280(ah))
 492                repeat_bit = AR_PHY_SPECTRAL_SCAN_SHORT_REPEAT;
 493        else
 494                repeat_bit = AR_PHY_SPECTRAL_SCAN_SHORT_REPEAT_KIWI;
 495
 496        if (param->short_repeat)
 497                REG_SET_BIT(ah, AR_PHY_SPECTRAL_SCAN, repeat_bit);
 498        else
 499                REG_CLR_BIT(ah, AR_PHY_SPECTRAL_SCAN, repeat_bit);
 500
 501        /* on AR92xx, the highest bit of count will make the the chip send
 502         * spectral samples endlessly. Check if this really was intended,
 503         * and fix otherwise.
 504         */
 505        count = param->count;
 506        if (param->endless) {
 507                if (AR_SREV_9280(ah))
 508                        count = 0x80;
 509                else
 510                        count = 0;
 511        } else if (count & 0x80)
 512                count = 0x7f;
 513        else if (!count)
 514                count = 1;
 515
 516        if (AR_SREV_9280(ah)) {
 517                REG_RMW_FIELD(ah, AR_PHY_SPECTRAL_SCAN,
 518                              AR_PHY_SPECTRAL_SCAN_COUNT, count);
 519        } else {
 520                REG_RMW_FIELD(ah, AR_PHY_SPECTRAL_SCAN,
 521                              AR_PHY_SPECTRAL_SCAN_COUNT_KIWI, count);
 522                REG_SET_BIT(ah, AR_PHY_SPECTRAL_SCAN,
 523                            AR_PHY_SPECTRAL_SCAN_PHYERR_MASK_SELECT);
 524        }
 525
 526        REG_RMW_FIELD(ah, AR_PHY_SPECTRAL_SCAN,
 527                      AR_PHY_SPECTRAL_SCAN_PERIOD, param->period);
 528        REG_RMW_FIELD(ah, AR_PHY_SPECTRAL_SCAN,
 529                      AR_PHY_SPECTRAL_SCAN_FFT_PERIOD, param->fft_period);
 530
 531        return;
 532}
 533
 534static void ar9002_hw_spectral_scan_trigger(struct ath_hw *ah)
 535{
 536        REG_SET_BIT(ah, AR_PHY_SPECTRAL_SCAN, AR_PHY_SPECTRAL_SCAN_ENABLE);
 537        /* Activate spectral scan */
 538        REG_SET_BIT(ah, AR_PHY_SPECTRAL_SCAN,
 539                    AR_PHY_SPECTRAL_SCAN_ACTIVE);
 540}
 541
 542static void ar9002_hw_spectral_scan_wait(struct ath_hw *ah)
 543{
 544        struct ath_common *common = ath9k_hw_common(ah);
 545
 546        /* Poll for spectral scan complete */
 547        if (!ath9k_hw_wait(ah, AR_PHY_SPECTRAL_SCAN,
 548                           AR_PHY_SPECTRAL_SCAN_ACTIVE,
 549                           0, AH_WAIT_TIMEOUT)) {
 550                ath_err(common, "spectral scan wait failed\n");
 551                return;
 552        }
 553}
 554
 555static void ar9002_hw_tx99_start(struct ath_hw *ah, u32 qnum)
 556{
 557        REG_SET_BIT(ah, 0x9864, 0x7f000);
 558        REG_SET_BIT(ah, 0x9924, 0x7f00fe);
 559        REG_CLR_BIT(ah, AR_DIAG_SW, AR_DIAG_RX_DIS);
 560        REG_WRITE(ah, AR_CR, AR_CR_RXD);
 561        REG_WRITE(ah, AR_DLCL_IFS(qnum), 0);
 562        REG_WRITE(ah, AR_D_GBL_IFS_SIFS, 20);
 563        REG_WRITE(ah, AR_D_GBL_IFS_EIFS, 20);
 564        REG_WRITE(ah, AR_D_FPCTL, 0x10|qnum);
 565        REG_WRITE(ah, AR_TIME_OUT, 0x00000400);
 566        REG_WRITE(ah, AR_DRETRY_LIMIT(qnum), 0xffffffff);
 567        REG_SET_BIT(ah, AR_QMISC(qnum), AR_Q_MISC_DCU_EARLY_TERM_REQ);
 568}
 569
 570static void ar9002_hw_tx99_stop(struct ath_hw *ah)
 571{
 572        REG_SET_BIT(ah, AR_DIAG_SW, AR_DIAG_RX_DIS);
 573}
 574
 575void ar9002_hw_attach_phy_ops(struct ath_hw *ah)
 576{
 577        struct ath_hw_private_ops *priv_ops = ath9k_hw_private_ops(ah);
 578        struct ath_hw_ops *ops = ath9k_hw_ops(ah);
 579
 580        priv_ops->set_rf_regs = NULL;
 581        priv_ops->rf_set_freq = ar9002_hw_set_channel;
 582        priv_ops->spur_mitigate_freq = ar9002_hw_spur_mitigate;
 583        priv_ops->olc_init = ar9002_olc_init;
 584        priv_ops->compute_pll_control = ar9002_hw_compute_pll_control;
 585        priv_ops->do_getnf = ar9002_hw_do_getnf;
 586
 587        ops->antdiv_comb_conf_get = ar9002_hw_antdiv_comb_conf_get;
 588        ops->antdiv_comb_conf_set = ar9002_hw_antdiv_comb_conf_set;
 589        ops->spectral_scan_config = ar9002_hw_spectral_scan_config;
 590        ops->spectral_scan_trigger = ar9002_hw_spectral_scan_trigger;
 591        ops->spectral_scan_wait = ar9002_hw_spectral_scan_wait;
 592
 593#ifdef CONFIG_ATH9K_BTCOEX_SUPPORT
 594        ops->set_bt_ant_diversity = ar9002_hw_set_bt_ant_diversity;
 595#endif
 596        ops->tx99_start = ar9002_hw_tx99_start;
 597        ops->tx99_stop = ar9002_hw_tx99_stop;
 598
 599        ar9002_hw_set_nf_limits(ah);
 600}
 601