sys/dev/bwi/bwirf.c

   1 /*
   2  * Copyright (c) 2007 The DragonFly Project.  All rights reserved.
   3  *
   4  * This code is derived from software contributed to The DragonFly Project
   5  * by Sepherosa Ziehau <sepherosa@gmail.com>
   6  *
   7  * Redistribution and use in source and binary forms, with or without
   8  * modification, are permitted provided that the following conditions
   9  * are met:
  10  *
  11  * 1. Redistributions of source code must retain the above copyright
  12  *    notice, this list of conditions and the following disclaimer.
  13  * 2. Redistributions in binary form must reproduce the above copyright
  14  *    notice, this list of conditions and the following disclaimer in
  15  *    the documentation and/or other materials provided with the
  16  *    distribution.
  17  * 3. Neither the name of The DragonFly Project nor the names of its
  18  *    contributors may be used to endorse or promote products derived
  19  *    from this software without specific, prior written permission.
  20  *
  21  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  22  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  23  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
  24  * FOR A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE
  25  * COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
  26  * INCIDENTAL, SPECIAL, EXEMPLARY OR CONSEQUENTIAL DAMAGES (INCLUDING,
  27  * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
  28  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
  29  * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
  30  * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
  31  * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  32  * SUCH DAMAGE.
  33  *
  34  * $DragonFly: src/sys/dev/netif/bwi/bwirf.c,v 1.9 2008/08/21 12:19:33 swildner Exp $
  35  */
  36
  37 #include <sys/cdefs.h>
  38 __FBSDID("$FreeBSD$");
  39
  40 #include "opt_inet.h"
  41 #include "opt_bwi.h"
  42 #include "opt_wlan.h"
  43
  44 #include <sys/param.h>
  45 #include <sys/endian.h>
  46 #include <sys/kernel.h>
  47 #include <sys/bus.h>
  48 #include <sys/malloc.h>
  49 #include <sys/proc.h>
  50 #include <sys/rman.h>
  51 #include <sys/socket.h>
  52 #include <sys/sockio.h>
  53 #include <sys/sysctl.h>
  54 #include <sys/systm.h>
  55
  56 #include <net/if.h>
  57 #include <net/if_var.h>
  58 #include <net/if_dl.h>
  59 #include <net/if_media.h>
  60 #include <net/if_types.h>
  61 #include <net/if_arp.h>
  62 #include <net/ethernet.h>
  63 #include <net/if_llc.h>
  64
  65 #include <net80211/ieee80211_var.h>
  66 #include <net80211/ieee80211_radiotap.h>
  67 #include <net80211/ieee80211_amrr.h>
  68
  69 #include <machine/bus.h>
  70
  71 #include <dev/bwi/bitops.h>
  72 #include <dev/bwi/if_bwireg.h>
  73 #include <dev/bwi/if_bwivar.h>
  74 #include <dev/bwi/bwimac.h>
  75 #include <dev/bwi/bwirf.h>
  76 #include <dev/bwi/bwiphy.h>
  77
  78 #define RF_LO_WRITE(mac, lo)    bwi_rf_lo_write((mac), (lo))
  79
  80 #define BWI_RF_2GHZ_CHAN(chan)                  \
  81         (ieee80211_ieee2mhz((chan), IEEE80211_CHAN_2GHZ) - 2400)
  82
  83 #define BWI_DEFAULT_IDLE_TSSI   52
  84
  85 struct rf_saveregs {
  86         uint16_t        phy_01;
  87         uint16_t        phy_03;
  88         uint16_t        phy_0a;
  89         uint16_t        phy_15;
  90         uint16_t        phy_2a;
  91         uint16_t        phy_30;
  92         uint16_t        phy_35;
  93         uint16_t        phy_60;
  94         uint16_t        phy_429;
  95         uint16_t        phy_802;
  96         uint16_t        phy_811;
  97         uint16_t        phy_812;
  98         uint16_t        phy_814;
  99         uint16_t        phy_815;
 100
 101         uint16_t        rf_43;
 102         uint16_t        rf_52;
 103         uint16_t        rf_7a;
 104 };
 105
 106 #define SAVE_RF_REG(mac, regs, n)       (regs)->rf_##n = RF_READ((mac), 0x##n)
 107 #define RESTORE_RF_REG(mac, regs, n)    RF_WRITE((mac), 0x##n, (regs)->rf_##n)
 108
 109 #define SAVE_PHY_REG(mac, regs, n)      (regs)->phy_##n = PHY_READ((mac), 0x##n)
 110 #define RESTORE_PHY_REG(mac, regs, n)   PHY_WRITE((mac), 0x##n, (regs)->phy_##n)
 111
 112 static int      bwi_rf_calc_txpower(int8_t *, uint8_t, const int16_t[]);
 113 static void     bwi_rf_work_around(struct bwi_mac *, u_int);
 114 static int      bwi_rf_gain_max_reached(struct bwi_mac *, int);
 115 static uint16_t bwi_rf_calibval(struct bwi_mac *);
 116 static uint16_t bwi_rf_get_tp_ctrl2(struct bwi_mac *);
 117
 118 static void     bwi_rf_lo_update_11b(struct bwi_mac *);
 119 static uint16_t bwi_rf_lo_measure_11b(struct bwi_mac *);
 120
 121 static void     bwi_rf_lo_update_11g(struct bwi_mac *);
 122 static uint32_t bwi_rf_lo_devi_measure(struct bwi_mac *, uint16_t);
 123 static void     bwi_rf_lo_measure_11g(struct bwi_mac *,
 124                         const struct bwi_rf_lo *, struct bwi_rf_lo *, uint8_t);
 125 static uint8_t  _bwi_rf_lo_update_11g(struct bwi_mac *, uint16_t);
 126 static void     bwi_rf_lo_write(struct bwi_mac *, const struct bwi_rf_lo *);
 127
 128 static void     bwi_rf_set_nrssi_ofs_11g(struct bwi_mac *);
 129 static void     bwi_rf_calc_nrssi_slope_11b(struct bwi_mac *);
 130 static void     bwi_rf_calc_nrssi_slope_11g(struct bwi_mac *);
 131 static void     bwi_rf_set_nrssi_thr_11b(struct bwi_mac *);
 132 static void     bwi_rf_set_nrssi_thr_11g(struct bwi_mac *);
 133
 134 static void     bwi_rf_init_sw_nrssi_table(struct bwi_mac *);
 135
 136 static int      bwi_rf_calc_rssi_bcm2050(struct bwi_mac *,
 137                         const struct bwi_rxbuf_hdr *);
 138 static int      bwi_rf_calc_rssi_bcm2053(struct bwi_mac *,
 139                         const struct bwi_rxbuf_hdr *);
 140 static int      bwi_rf_calc_rssi_bcm2060(struct bwi_mac *,
 141                         const struct bwi_rxbuf_hdr *);
 142 static int      bwi_rf_calc_noise_bcm2050(struct bwi_mac *);
 143 static int      bwi_rf_calc_noise_bcm2053(struct bwi_mac *);
 144 static int      bwi_rf_calc_noise_bcm2060(struct bwi_mac *);
 145
 146 static void     bwi_rf_on_11a(struct bwi_mac *);
 147 static void     bwi_rf_on_11bg(struct bwi_mac *);
 148
 149 static void     bwi_rf_off_11a(struct bwi_mac *);
 150 static void     bwi_rf_off_11bg(struct bwi_mac *);
 151 static void     bwi_rf_off_11g_rev5(struct bwi_mac *);
 152
 153 static const int8_t     bwi_txpower_map_11b[BWI_TSSI_MAX] =
 154         { BWI_TXPOWER_MAP_11B };
 155 static const int8_t     bwi_txpower_map_11g[BWI_TSSI_MAX] =
 156         { BWI_TXPOWER_MAP_11G };
 157
 158 static __inline int16_t
 159 bwi_nrssi_11g(struct bwi_mac *mac)
 160 {
 161         int16_t val;
 162
 163 #define NRSSI_11G_MASK          __BITS(13, 8)
 164
 165         val = (int16_t)__SHIFTOUT(PHY_READ(mac, 0x47f), NRSSI_11G_MASK);
 166         if (val >= 32)
 167                 val -= 64;
 168         return val;
 169
 170 #undef NRSSI_11G_MASK
 171 }
 172
 173 static __inline struct bwi_rf_lo *
 174 bwi_get_rf_lo(struct bwi_mac *mac, uint16_t rf_atten, uint16_t bbp_atten)
 175 {
 176         int n;
 177
 178         n = rf_atten + (14 * (bbp_atten / 2));
 179         KASSERT(n < BWI_RFLO_MAX, ("n %d", n));
 180
 181         return &mac->mac_rf.rf_lo[n];
 182 }
 183
 184 static __inline int
 185 bwi_rf_lo_isused(struct bwi_mac *mac, const struct bwi_rf_lo *lo)
 186 {
 187         struct bwi_rf *rf = &mac->mac_rf;
 188         int idx;
 189
 190         idx = lo - rf->rf_lo;
 191         KASSERT(idx >= 0 && idx < BWI_RFLO_MAX, ("idx %d", idx));
 192
 193         return isset(rf->rf_lo_used, idx);
 194 }
 195
 196 void
 197 bwi_rf_write(struct bwi_mac *mac, uint16_t ctrl, uint16_t data)
 198 {
 199         struct bwi_softc *sc = mac->mac_sc;
 200
 201         CSR_WRITE_2(sc, BWI_RF_CTRL, ctrl);
 202         CSR_WRITE_2(sc, BWI_RF_DATA_LO, data);
 203 }
 204
 205 uint16_t
 206 bwi_rf_read(struct bwi_mac *mac, uint16_t ctrl)
 207 {
 208         struct bwi_rf *rf = &mac->mac_rf;
 209         struct bwi_softc *sc = mac->mac_sc;
 210
 211         ctrl |= rf->rf_ctrl_rd;
 212         if (rf->rf_ctrl_adj) {
 213                 /* XXX */
 214                 if (ctrl < 0x70)
 215                         ctrl += 0x80;
 216                 else if (ctrl < 0x80)
 217                         ctrl += 0x70;
 218         }
 219
 220         CSR_WRITE_2(sc, BWI_RF_CTRL, ctrl);
 221         return CSR_READ_2(sc, BWI_RF_DATA_LO);
 222 }
 223
 224 int
 225 bwi_rf_attach(struct bwi_mac *mac)
 226 {
 227         struct bwi_softc *sc = mac->mac_sc;
 228         struct bwi_phy *phy = &mac->mac_phy;
 229         struct bwi_rf *rf = &mac->mac_rf;
 230         uint16_t type, manu;
 231         uint8_t rev;
 232
 233         /*
 234          * Get RF manufacture/type/revision
 235          */
 236         if (sc->sc_bbp_id == BWI_BBPID_BCM4317) {
 237                 /*
 238                  * Fake a BCM2050 RF
 239                  */
 240                 manu = BWI_RF_MANUFACT_BCM;
 241                 type = BWI_RF_T_BCM2050;
 242                 if (sc->sc_bbp_rev == 0)
 243                         rev = 3;
 244                 else if (sc->sc_bbp_rev == 1)
 245                         rev = 4;
 246                 else
 247                         rev = 5;
 248         } else {
 249                 uint32_t val;
 250
 251                 CSR_WRITE_2(sc, BWI_RF_CTRL, BWI_RF_CTRL_RFINFO);
 252                 val = CSR_READ_2(sc, BWI_RF_DATA_HI);
 253                 val <<= 16;
 254
 255                 CSR_WRITE_2(sc, BWI_RF_CTRL, BWI_RF_CTRL_RFINFO);
 256                 val |= CSR_READ_2(sc, BWI_RF_DATA_LO);
 257
 258                 manu = __SHIFTOUT(val, BWI_RFINFO_MANUFACT_MASK);
 259                 type = __SHIFTOUT(val, BWI_RFINFO_TYPE_MASK);
 260                 rev = __SHIFTOUT(val, BWI_RFINFO_REV_MASK);
 261         }
 262         device_printf(sc->sc_dev, "RF: manu 0x%03x, type 0x%04x, rev %u\n",
 263                       manu, type, rev);
 264
 265         /*
 266          * Verify whether the RF is supported
 267          */
 268         rf->rf_ctrl_rd = 0;
 269         rf->rf_ctrl_adj = 0;
 270         switch (phy->phy_mode) {
 271         case IEEE80211_MODE_11A:
 272                 if (manu != BWI_RF_MANUFACT_BCM ||
 273                     type != BWI_RF_T_BCM2060 ||
 274                     rev != 1) {
 275                         device_printf(sc->sc_dev, "only BCM2060 rev 1 RF "
 276                                       "is supported for 11A PHY\n");
 277                         return ENXIO;
 278                 }
 279                 rf->rf_ctrl_rd = BWI_RF_CTRL_RD_11A;
 280                 rf->rf_on = bwi_rf_on_11a;
 281                 rf->rf_off = bwi_rf_off_11a;
 282                 rf->rf_calc_rssi = bwi_rf_calc_rssi_bcm2060;
 283                 rf->rf_calc_noise = bwi_rf_calc_noise_bcm2060;
 284                 break;
 285         case IEEE80211_MODE_11B:
 286                 if (type == BWI_RF_T_BCM2050) {
 287                         rf->rf_ctrl_rd = BWI_RF_CTRL_RD_11BG;
 288                         rf->rf_calc_rssi = bwi_rf_calc_rssi_bcm2050;
 289                         rf->rf_calc_noise = bwi_rf_calc_noise_bcm2050;
 290                 } else if (type == BWI_RF_T_BCM2053) {
 291                         rf->rf_ctrl_adj = 1;
 292                         rf->rf_calc_rssi = bwi_rf_calc_rssi_bcm2053;
 293                         rf->rf_calc_noise = bwi_rf_calc_noise_bcm2053;
 294                 } else {
 295                         device_printf(sc->sc_dev, "only BCM2050/BCM2053 RF "
 296                                       "is supported for 11B PHY\n");
 297                         return ENXIO;
 298                 }
 299                 rf->rf_on = bwi_rf_on_11bg;
 300                 rf->rf_off = bwi_rf_off_11bg;
 301                 rf->rf_calc_nrssi_slope = bwi_rf_calc_nrssi_slope_11b;
 302                 rf->rf_set_nrssi_thr = bwi_rf_set_nrssi_thr_11b;
 303                 if (phy->phy_rev == 6)
 304                         rf->rf_lo_update = bwi_rf_lo_update_11g;
 305                 else
 306                         rf->rf_lo_update = bwi_rf_lo_update_11b;
 307                 break;
 308         case IEEE80211_MODE_11G:
 309                 if (type != BWI_RF_T_BCM2050) {
 310                         device_printf(sc->sc_dev, "only BCM2050 RF "
 311                                       "is supported for 11G PHY\n");
 312                         return ENXIO;
 313                 }
 314                 rf->rf_ctrl_rd = BWI_RF_CTRL_RD_11BG;
 315                 rf->rf_on = bwi_rf_on_11bg;
 316                 if (mac->mac_rev >= 5)
 317                         rf->rf_off = bwi_rf_off_11g_rev5;
 318                 else
 319                         rf->rf_off = bwi_rf_off_11bg;
 320                 rf->rf_calc_nrssi_slope = bwi_rf_calc_nrssi_slope_11g;
 321                 rf->rf_set_nrssi_thr = bwi_rf_set_nrssi_thr_11g;
 322                 rf->rf_calc_rssi = bwi_rf_calc_rssi_bcm2050;
 323                 rf->rf_calc_noise = bwi_rf_calc_noise_bcm2050;
 324                 rf->rf_lo_update = bwi_rf_lo_update_11g;
 325                 break;
 326         default:
 327                 device_printf(sc->sc_dev, "unsupported PHY mode\n");
 328                 return ENXIO;
 329         }
 330
 331         rf->rf_type = type;
 332         rf->rf_rev = rev;
 333         rf->rf_manu = manu;
 334         rf->rf_curchan = IEEE80211_CHAN_ANY;
 335         rf->rf_ant_mode = BWI_ANT_MODE_AUTO;
 336         return 0;
 337 }
 338
 339 void
 340 bwi_rf_set_chan(struct bwi_mac *mac, u_int chan, int work_around)
 341 {
 342         struct bwi_softc *sc = mac->mac_sc;
 343
 344         if (chan == IEEE80211_CHAN_ANY)
 345                 return;
 346
 347         MOBJ_WRITE_2(mac, BWI_COMM_MOBJ, BWI_COMM_MOBJ_CHAN, chan);
 348
 349         /* TODO: 11A */
 350
 351         if (work_around)
 352                 bwi_rf_work_around(mac, chan);
 353
 354         CSR_WRITE_2(sc, BWI_RF_CHAN, BWI_RF_2GHZ_CHAN(chan));
 355
 356         if (chan == 14) {
 357                 if (sc->sc_locale == BWI_SPROM_LOCALE_JAPAN)
 358                         HFLAGS_CLRBITS(mac, BWI_HFLAG_NOT_JAPAN);
 359                 else
 360                         HFLAGS_SETBITS(mac, BWI_HFLAG_NOT_JAPAN);
 361                 CSR_SETBITS_2(sc, BWI_RF_CHAN_EX, (1 << 11)); /* XXX */
 362         } else {
 363                 CSR_CLRBITS_2(sc, BWI_RF_CHAN_EX, 0x840); /* XXX */
 364         }
 365         DELAY(8000);    /* DELAY(2000); */
 366
 367         mac->mac_rf.rf_curchan = chan;
 368 }
 369
 370 void
 371 bwi_rf_get_gains(struct bwi_mac *mac)
 372 {
 373 #define SAVE_PHY_MAX    15
 374 #define SAVE_RF_MAX     3
 375
 376         static const uint16_t save_rf_regs[SAVE_RF_MAX] =
 377         { 0x52, 0x43, 0x7a };
 378         static const uint16_t save_phy_regs[SAVE_PHY_MAX] = {
 379                 0x0429, 0x0001, 0x0811, 0x0812,
 380                 0x0814, 0x0815, 0x005a, 0x0059,
 381                 0x0058, 0x000a, 0x0003, 0x080f,
 382                 0x0810, 0x002b, 0x0015
 383         };
 384
 385         struct bwi_softc *sc = mac->mac_sc;
 386         struct bwi_phy *phy = &mac->mac_phy;
 387         struct bwi_rf *rf = &mac->mac_rf;
 388         uint16_t save_phy[SAVE_PHY_MAX];
 389         uint16_t save_rf[SAVE_RF_MAX];
 390         uint16_t trsw;
 391         int i, j, loop1_max, loop1, loop2;
 392
 393         /*
 394          * Save PHY/RF registers for later restoration
 395          */
 396         for (i = 0; i < SAVE_PHY_MAX; ++i)
 397                 save_phy[i] = PHY_READ(mac, save_phy_regs[i]);
 398         PHY_READ(mac, 0x2d); /* dummy read */
 399
 400         for (i = 0; i < SAVE_RF_MAX; ++i)
 401                 save_rf[i] = RF_READ(mac, save_rf_regs[i]);
 402
 403         PHY_CLRBITS(mac, 0x429, 0xc000);
 404         PHY_SETBITS(mac, 0x1, 0x8000);
 405
 406         PHY_SETBITS(mac, 0x811, 0x2);
 407         PHY_CLRBITS(mac, 0x812, 0x2);
 408         PHY_SETBITS(mac, 0x811, 0x1);
 409         PHY_CLRBITS(mac, 0x812, 0x1);
 410
 411         PHY_SETBITS(mac, 0x814, 0x1);
 412         PHY_CLRBITS(mac, 0x815, 0x1);
 413         PHY_SETBITS(mac, 0x814, 0x2);
 414         PHY_CLRBITS(mac, 0x815, 0x2);
 415
 416         PHY_SETBITS(mac, 0x811, 0xc);
 417         PHY_SETBITS(mac, 0x812, 0xc);
 418         PHY_SETBITS(mac, 0x811, 0x30);
 419         PHY_FILT_SETBITS(mac, 0x812, 0xffcf, 0x10);
 420
 421         PHY_WRITE(mac, 0x5a, 0x780);
 422         PHY_WRITE(mac, 0x59, 0xc810);
 423         PHY_WRITE(mac, 0x58, 0xd);
 424         PHY_SETBITS(mac, 0xa, 0x2000);
 425
 426         PHY_SETBITS(mac, 0x814, 0x4);
 427         PHY_CLRBITS(mac, 0x815, 0x4);
 428
 429         PHY_FILT_SETBITS(mac, 0x3, 0xff9f, 0x40);
 430
 431         if (rf->rf_rev == 8) {
 432                 loop1_max = 15;
 433                 RF_WRITE(mac, 0x43, loop1_max);
 434         } else {
 435                 loop1_max = 9;
 436                 RF_WRITE(mac, 0x52, 0x0);
 437                 RF_FILT_SETBITS(mac, 0x43, 0xfff0, loop1_max);
 438         }
 439
 440         bwi_phy_set_bbp_atten(mac, 11);
 441
 442         if (phy->phy_rev >= 3)
 443                 PHY_WRITE(mac, 0x80f, 0xc020);
 444         else
 445                 PHY_WRITE(mac, 0x80f, 0x8020);
 446         PHY_WRITE(mac, 0x810, 0);
 447
 448         PHY_FILT_SETBITS(mac, 0x2b, 0xffc0, 0x1);
 449         PHY_FILT_SETBITS(mac, 0x2b, 0xc0ff, 0x800);
 450         PHY_SETBITS(mac, 0x811, 0x100);
 451         PHY_CLRBITS(mac, 0x812, 0x3000);
 452
 453         if ((sc->sc_card_flags & BWI_CARD_F_EXT_LNA) &&
 454             phy->phy_rev >= 7) {
 455                 PHY_SETBITS(mac, 0x811, 0x800);
 456                 PHY_SETBITS(mac, 0x812, 0x8000);
 457         }
 458         RF_CLRBITS(mac, 0x7a, 0xff08);
 459
 460         /*
 461          * Find out 'loop1/loop2', which will be used to calculate
 462          * max loopback gain later
 463          */
 464         j = 0;
 465         for (i = 0; i < loop1_max; ++i) {
 466                 for (j = 0; j < 16; ++j) {
 467                         RF_WRITE(mac, 0x43, i);
 468
 469                         if (bwi_rf_gain_max_reached(mac, j))
 470                                 goto loop1_exit;
 471                 }
 472         }
 473 loop1_exit:
 474         loop1 = i;
 475         loop2 = j;
 476
 477         /*
 478          * Find out 'trsw', which will be used to calculate
 479          * TRSW(TX/RX switch) RX gain later
 480          */
 481         if (loop2 >= 8) {
 482                 PHY_SETBITS(mac, 0x812, 0x30);
 483                 trsw = 0x1b;
 484                 for (i = loop2 - 8; i < 16; ++i) {
 485                         trsw -= 3;
 486                         if (bwi_rf_gain_max_reached(mac, i))
 487                                 break;
 488                 }
 489         } else {
 490                 trsw = 0x18;
 491         }
 492
 493         /*
 494          * Restore saved PHY/RF registers
 495          */
 496         /* First 4 saved PHY registers need special processing */
 497         for (i = 4; i < SAVE_PHY_MAX; ++i)
 498                 PHY_WRITE(mac, save_phy_regs[i], save_phy[i]);
 499
 500         bwi_phy_set_bbp_atten(mac, mac->mac_tpctl.bbp_atten);
 501
 502         for (i = 0; i < SAVE_RF_MAX; ++i)
 503                 RF_WRITE(mac, save_rf_regs[i], save_rf[i]);
 504
 505         PHY_WRITE(mac, save_phy_regs[2], save_phy[2] | 0x3);
 506         DELAY(10);
 507         PHY_WRITE(mac, save_phy_regs[2], save_phy[2]);
 508         PHY_WRITE(mac, save_phy_regs[3], save_phy[3]);
 509         PHY_WRITE(mac, save_phy_regs[0], save_phy[0]);
 510         PHY_WRITE(mac, save_phy_regs[1], save_phy[1]);
 511
 512         /*
 513          * Calculate gains
 514          */
 515         rf->rf_lo_gain = (loop2 * 6) - (loop1 * 4) - 11;
 516         rf->rf_rx_gain = trsw * 2;
 517         DPRINTF(mac->mac_sc, BWI_DBG_RF | BWI_DBG_INIT,
 518                 "lo gain: %u, rx gain: %u\n",
 519                 rf->rf_lo_gain, rf->rf_rx_gain);
 520
 521 #undef SAVE_RF_MAX
 522 #undef SAVE_PHY_MAX
 523 }
 524
 525 void
 526 bwi_rf_init(struct bwi_mac *mac)
 527 {
 528         struct bwi_rf *rf = &mac->mac_rf;
 529
 530         if (rf->rf_type == BWI_RF_T_BCM2060) {
 531                 /* TODO: 11A */
 532         } else {
 533                 if (rf->rf_flags & BWI_RF_F_INITED)
 534                         RF_WRITE(mac, 0x78, rf->rf_calib);
 535                 else
 536                         bwi_rf_init_bcm2050(mac);
 537         }
 538 }
 539
 540 static void
 541 bwi_rf_off_11a(struct bwi_mac *mac)
 542 {
 543         RF_WRITE(mac, 0x4, 0xff);
 544         RF_WRITE(mac, 0x5, 0xfb);
 545
 546         PHY_SETBITS(mac, 0x10, 0x8);
 547         PHY_SETBITS(mac, 0x11, 0x8);
 548
 549         PHY_WRITE(mac, 0x15, 0xaa00);
 550 }
 551
 552 static void
 553 bwi_rf_off_11bg(struct bwi_mac *mac)
 554 {
 555         PHY_WRITE(mac, 0x15, 0xaa00);
 556 }
 557
 558 static void
 559 bwi_rf_off_11g_rev5(struct bwi_mac *mac)
 560 {
 561         PHY_SETBITS(mac, 0x811, 0x8c);
 562         PHY_CLRBITS(mac, 0x812, 0x8c);
 563 }
 564
 565 static void
 566 bwi_rf_work_around(struct bwi_mac *mac, u_int chan)
 567 {
 568         struct bwi_softc *sc = mac->mac_sc;
 569         struct bwi_rf *rf = &mac->mac_rf;
 570
 571         if (chan == IEEE80211_CHAN_ANY) {
 572                 device_printf(sc->sc_dev, "%s invalid channel!!\n", __func__);
 573                 return;
 574         }
 575
 576         if (rf->rf_type != BWI_RF_T_BCM2050 || rf->rf_rev >= 6)
 577                 return;
 578
 579         if (chan <= 10)
 580                 CSR_WRITE_2(sc, BWI_RF_CHAN, BWI_RF_2GHZ_CHAN(chan + 4));
 581         else
 582                 CSR_WRITE_2(sc, BWI_RF_CHAN, BWI_RF_2GHZ_CHAN(1));
 583         DELAY(1000);
 584         CSR_WRITE_2(sc, BWI_RF_CHAN, BWI_RF_2GHZ_CHAN(chan));
 585 }
 586
 587 static __inline struct bwi_rf_lo *
 588 bwi_rf_lo_find(struct bwi_mac *mac, const struct bwi_tpctl *tpctl)
 589 {
 590         uint16_t rf_atten, bbp_atten;
 591         int remap_rf_atten;
 592
 593         remap_rf_atten = 1;
 594         if (tpctl == NULL) {
 595                 bbp_atten = 2;
 596                 rf_atten = 3;
 597         } else {
 598                 if (tpctl->tp_ctrl1 == 3)
 599                         remap_rf_atten = 0;
 600
 601                 bbp_atten = tpctl->bbp_atten;
 602                 rf_atten = tpctl->rf_atten;
 603
 604                 if (bbp_atten > 6)
 605                         bbp_atten = 6;
 606         }
 607
 608         if (remap_rf_atten) {
 609 #define MAP_MAX 10
 610                 static const uint16_t map[MAP_MAX] =
 611                 { 11, 10, 11, 12, 13, 12, 13, 12, 13, 12 };
 612
 613 #if 0
 614                 KASSERT(rf_atten < MAP_MAX, ("rf_atten %d", rf_atten));
 615                 rf_atten = map[rf_atten];
 616 #else
 617                 if (rf_atten >= MAP_MAX) {
 618                         rf_atten = 0;   /* XXX */
 619                 } else {
 620                         rf_atten = map[rf_atten];
 621                 }
 622 #endif
 623 #undef MAP_MAX
 624         }
 625
 626         return bwi_get_rf_lo(mac, rf_atten, bbp_atten);
 627 }
 628
 629 void
 630 bwi_rf_lo_adjust(struct bwi_mac *mac, const struct bwi_tpctl *tpctl)
 631 {
 632         const struct bwi_rf_lo *lo;
 633
 634         lo = bwi_rf_lo_find(mac, tpctl);
 635         RF_LO_WRITE(mac, lo);
 636 }
 637
 638 static void
 639 bwi_rf_lo_write(struct bwi_mac *mac, const struct bwi_rf_lo *lo)
 640 {
 641         uint16_t val;
 642
 643         val = (uint8_t)lo->ctrl_lo;
 644         val |= ((uint8_t)lo->ctrl_hi) << 8;
 645
 646         PHY_WRITE(mac, BWI_PHYR_RF_LO, val);
 647 }
 648
 649 static int
 650 bwi_rf_gain_max_reached(struct bwi_mac *mac, int idx)
 651 {
 652         PHY_FILT_SETBITS(mac, 0x812, 0xf0ff, idx << 8);
 653         PHY_FILT_SETBITS(mac, 0x15, 0xfff, 0xa000);
 654         PHY_SETBITS(mac, 0x15, 0xf000);
 655
 656         DELAY(20);
 657
 658         return (PHY_READ(mac, 0x2d) >= 0xdfc);
 659 }
 660
 661 /* XXX use bitmap array */
 662 static __inline uint16_t
 663 bitswap4(uint16_t val)
 664 {
 665         uint16_t ret;
 666
 667         ret = (val & 0x8) >> 3;
 668         ret |= (val & 0x4) >> 1;
 669         ret |= (val & 0x2) << 1;
 670         ret |= (val & 0x1) << 3;
 671         return ret;
 672 }
 673
 674 static __inline uint16_t
 675 bwi_phy812_value(struct bwi_mac *mac, uint16_t lpd)
 676 {
 677         struct bwi_softc *sc = mac->mac_sc;
 678         struct bwi_phy *phy = &mac->mac_phy;
 679         struct bwi_rf *rf = &mac->mac_rf;
 680         uint16_t lo_gain, ext_lna, loop;
 681
 682         if ((phy->phy_flags & BWI_PHY_F_LINKED) == 0)
 683                 return 0;
 684
 685         lo_gain = rf->rf_lo_gain;
 686         if (rf->rf_rev == 8)
 687                 lo_gain += 0x3e;
 688         else
 689                 lo_gain += 0x26;
 690
 691         if (lo_gain >= 0x46) {
 692                 lo_gain -= 0x46;
 693                 ext_lna = 0x3000;
 694         } else if (lo_gain >= 0x3a) {
 695                 lo_gain -= 0x3a;
 696                 ext_lna = 0x1000;
 697         } else if (lo_gain >= 0x2e) {
 698                 lo_gain -= 0x2e;
 699                 ext_lna = 0x2000;
 700         } else {
 701                 lo_gain -= 0x10;
 702                 ext_lna = 0;
 703         }
 704
 705         for (loop = 0; loop < 16; ++loop) {
 706                 lo_gain -= (6 * loop);
 707                 if (lo_gain < 6)
 708                         break;
 709         }
 710
 711         if (phy->phy_rev >= 7 && (sc->sc_card_flags & BWI_CARD_F_EXT_LNA)) {
 712                 if (ext_lna)
 713                         ext_lna |= 0x8000;
 714                 ext_lna |= (loop << 8);
 715                 switch (lpd) {
 716                 case 0x011:
 717                         return 0x8f92;
 718                 case 0x001:
 719                         return (0x8092 | ext_lna);
 720                 case 0x101:
 721                         return (0x2092 | ext_lna);
 722                 case 0x100:
 723                         return (0x2093 | ext_lna);
 724                 default:
 725                         panic("unsupported lpd\n");
 726                 }
 727         } else {
 728                 ext_lna |= (loop << 8);
 729                 switch (lpd) {
 730                 case 0x011:
 731                         return 0xf92;
 732                 case 0x001:
 733                 case 0x101:
 734                         return (0x92 | ext_lna);
 735                 case 0x100:
 736                         return (0x93 | ext_lna);
 737                 default:
 738                         panic("unsupported lpd\n");
 739                 }
 740         }
 741
 742         panic("never reached\n");
 743         return 0;
 744 }
 745
 746 void
 747 bwi_rf_init_bcm2050(struct bwi_mac *mac)
 748 {
 749 #define SAVE_RF_MAX             3
 750 #define SAVE_PHY_COMM_MAX       4
 751 #define SAVE_PHY_11G_MAX        6
 752
 753         static const uint16_t save_rf_regs[SAVE_RF_MAX] =
 754         { 0x0043, 0x0051, 0x0052 };
 755         static const uint16_t save_phy_regs_comm[SAVE_PHY_COMM_MAX] =
 756         { 0x0015, 0x005a, 0x0059, 0x0058 };
 757         static const uint16_t save_phy_regs_11g[SAVE_PHY_11G_MAX] =
 758         { 0x0811, 0x0812, 0x0814, 0x0815, 0x0429, 0x0802 };
 759
 760         uint16_t save_rf[SAVE_RF_MAX];
 761         uint16_t save_phy_comm[SAVE_PHY_COMM_MAX];
 762         uint16_t save_phy_11g[SAVE_PHY_11G_MAX];
 763         uint16_t phyr_35, phyr_30 = 0, rfr_78, phyr_80f = 0, phyr_810 = 0;
 764         uint16_t bphy_ctrl = 0, bbp_atten, rf_chan_ex;
 765         uint16_t phy812_val;
 766         uint16_t calib;
 767         uint32_t test_lim, test;
 768         struct bwi_softc *sc = mac->mac_sc;
 769         struct bwi_phy *phy = &mac->mac_phy;
 770         struct bwi_rf *rf = &mac->mac_rf;
 771         int i;
 772
 773         /*
 774          * Save registers for later restoring
 775          */
 776         for (i = 0; i < SAVE_RF_MAX; ++i)
 777                 save_rf[i] = RF_READ(mac, save_rf_regs[i]);
 778         for (i = 0; i < SAVE_PHY_COMM_MAX; ++i)
 779                 save_phy_comm[i] = PHY_READ(mac, save_phy_regs_comm[i]);
 780
 781         if (phy->phy_mode == IEEE80211_MODE_11B) {
 782                 phyr_30 = PHY_READ(mac, 0x30);
 783                 bphy_ctrl = CSR_READ_2(sc, BWI_BPHY_CTRL);
 784
 785                 PHY_WRITE(mac, 0x30, 0xff);
 786                 CSR_WRITE_2(sc, BWI_BPHY_CTRL, 0x3f3f);
 787         } else if ((phy->phy_flags & BWI_PHY_F_LINKED) || phy->phy_rev >= 2) {
 788                 for (i = 0; i < SAVE_PHY_11G_MAX; ++i) {
 789                         save_phy_11g[i] =
 790                                 PHY_READ(mac, save_phy_regs_11g[i]);
 791                 }
 792
 793                 PHY_SETBITS(mac, 0x814, 0x3);
 794                 PHY_CLRBITS(mac, 0x815, 0x3);
 795                 PHY_CLRBITS(mac, 0x429, 0x8000);
 796                 PHY_CLRBITS(mac, 0x802, 0x3);
 797
 798                 phyr_80f = PHY_READ(mac, 0x80f);
 799                 phyr_810 = PHY_READ(mac, 0x810);
 800
 801                 if (phy->phy_rev >= 3)
 802                         PHY_WRITE(mac, 0x80f, 0xc020);
 803                 else
 804                         PHY_WRITE(mac, 0x80f, 0x8020);
 805                 PHY_WRITE(mac, 0x810, 0);
 806
 807                 phy812_val = bwi_phy812_value(mac, 0x011);
 808                 PHY_WRITE(mac, 0x812, phy812_val);
 809                 if (phy->phy_rev < 7 ||
 810                     (sc->sc_card_flags & BWI_CARD_F_EXT_LNA) == 0)
 811                         PHY_WRITE(mac, 0x811, 0x1b3);
 812                 else
 813                         PHY_WRITE(mac, 0x811, 0x9b3);
 814         }
 815         CSR_SETBITS_2(sc, BWI_RF_ANTDIV, 0x8000);
 816
 817         phyr_35 = PHY_READ(mac, 0x35);
 818         PHY_CLRBITS(mac, 0x35, 0x80);
 819
 820         bbp_atten = CSR_READ_2(sc, BWI_BBP_ATTEN);
 821         rf_chan_ex = CSR_READ_2(sc, BWI_RF_CHAN_EX);
 822
 823         if (phy->phy_version == 0) {
 824                 CSR_WRITE_2(sc, BWI_BBP_ATTEN, 0x122);
 825         } else {
 826                 if (phy->phy_version >= 2)
 827                         PHY_FILT_SETBITS(mac, 0x3, 0xffbf, 0x40);
 828                 CSR_SETBITS_2(sc, BWI_RF_CHAN_EX, 0x2000);
 829         }
 830
 831         calib = bwi_rf_calibval(mac);
 832
 833         if (phy->phy_mode == IEEE80211_MODE_11B)
 834                 RF_WRITE(mac, 0x78, 0x26);
 835
 836         if ((phy->phy_flags & BWI_PHY_F_LINKED) || phy->phy_rev >= 2) {
 837                 phy812_val = bwi_phy812_value(mac, 0x011);
 838                 PHY_WRITE(mac, 0x812, phy812_val);
 839         }
 840
 841         PHY_WRITE(mac, 0x15, 0xbfaf);
 842         PHY_WRITE(mac, 0x2b, 0x1403);
 843
 844         if ((phy->phy_flags & BWI_PHY_F_LINKED) || phy->phy_rev >= 2) {
 845                 phy812_val = bwi_phy812_value(mac, 0x001);
 846                 PHY_WRITE(mac, 0x812, phy812_val);
 847         }
 848
 849         PHY_WRITE(mac, 0x15, 0xbfa0);
 850
 851         RF_SETBITS(mac, 0x51, 0x4);
 852         if (rf->rf_rev == 8) {
 853                 RF_WRITE(mac, 0x43, 0x1f);
 854         } else {
 855                 RF_WRITE(mac, 0x52, 0);
 856                 RF_FILT_SETBITS(mac, 0x43, 0xfff0, 0x9);
 857         }
 858
 859         test_lim = 0;
 860         PHY_WRITE(mac, 0x58, 0);
 861         for (i = 0; i < 16; ++i) {
 862                 PHY_WRITE(mac, 0x5a, 0x480);
 863                 PHY_WRITE(mac, 0x59, 0xc810);
 864
 865                 PHY_WRITE(mac, 0x58, 0xd);
 866                 if ((phy->phy_flags & BWI_PHY_F_LINKED) || phy->phy_rev >= 2) {
 867                         phy812_val = bwi_phy812_value(mac, 0x101);
 868                         PHY_WRITE(mac, 0x812, phy812_val);
 869                 }
 870                 PHY_WRITE(mac, 0x15, 0xafb0);
 871                 DELAY(10);
 872
 873                 if ((phy->phy_flags & BWI_PHY_F_LINKED) || phy->phy_rev >= 2) {
 874                         phy812_val = bwi_phy812_value(mac, 0x101);
 875                         PHY_WRITE(mac, 0x812, phy812_val);
 876                 }
 877                 PHY_WRITE(mac, 0x15, 0xefb0);
 878                 DELAY(10);
 879
 880                 if ((phy->phy_flags & BWI_PHY_F_LINKED) || phy->phy_rev >= 2) {
 881                         phy812_val = bwi_phy812_value(mac, 0x100);
 882                         PHY_WRITE(mac, 0x812, phy812_val);
 883                 }
 884                 PHY_WRITE(mac, 0x15, 0xfff0);
 885                 DELAY(20);
 886
 887                 test_lim += PHY_READ(mac, 0x2d);
 888
 889                 PHY_WRITE(mac, 0x58, 0);
 890                 if ((phy->phy_flags & BWI_PHY_F_LINKED) || phy->phy_rev >= 2) {
 891                         phy812_val = bwi_phy812_value(mac, 0x101);
 892                         PHY_WRITE(mac, 0x812, phy812_val);
 893                 }
 894                 PHY_WRITE(mac, 0x15, 0xafb0);
 895         }
 896         ++test_lim;
 897         test_lim >>= 9;
 898
 899         DELAY(10);
 900
 901         test = 0;
 902         PHY_WRITE(mac, 0x58, 0);
 903         for (i = 0; i < 16; ++i) {
 904                 int j;
 905
 906                 rfr_78 = (bitswap4(i) << 1) | 0x20;
 907                 RF_WRITE(mac, 0x78, rfr_78);
 908                 DELAY(10);
 909
 910                 /* NB: This block is slight different than the above one */
 911                 for (j = 0; j < 16; ++j) {
 912                         PHY_WRITE(mac, 0x5a, 0xd80);
 913                         PHY_WRITE(mac, 0x59, 0xc810);
 914
 915                         PHY_WRITE(mac, 0x58, 0xd);
 916                         if ((phy->phy_flags & BWI_PHY_F_LINKED) ||
 917                             phy->phy_rev >= 2) {
 918                                 phy812_val = bwi_phy812_value(mac, 0x101);
 919                                 PHY_WRITE(mac, 0x812, phy812_val);
 920                         }
 921                         PHY_WRITE(mac, 0x15, 0xafb0);
 922                         DELAY(10);
 923
 924                         if ((phy->phy_flags & BWI_PHY_F_LINKED) ||
 925                             phy->phy_rev >= 2) {
 926                                 phy812_val = bwi_phy812_value(mac, 0x101);
 927                                 PHY_WRITE(mac, 0x812, phy812_val);
 928                         }
 929                         PHY_WRITE(mac, 0x15, 0xefb0);
 930                         DELAY(10);
 931
 932                         if ((phy->phy_flags & BWI_PHY_F_LINKED) ||
 933                             phy->phy_rev >= 2) {
 934                                 phy812_val = bwi_phy812_value(mac, 0x100);
 935                                 PHY_WRITE(mac, 0x812, phy812_val);
 936                         }
 937                         PHY_WRITE(mac, 0x15, 0xfff0);
 938                         DELAY(10);
 939
 940                         test += PHY_READ(mac, 0x2d);
 941
 942                         PHY_WRITE(mac, 0x58, 0);
 943                         if ((phy->phy_flags & BWI_PHY_F_LINKED) ||
 944                             phy->phy_rev >= 2) {
 945                                 phy812_val = bwi_phy812_value(mac, 0x101);
 946                                 PHY_WRITE(mac, 0x812, phy812_val);
 947                         }
 948                         PHY_WRITE(mac, 0x15, 0xafb0);
 949                 }
 950
 951                 ++test;
 952                 test >>= 8;
 953
 954                 if (test > test_lim)
 955                         break;
 956         }
 957         if (i > 15)
 958                 rf->rf_calib = rfr_78;
 959         else
 960                 rf->rf_calib = calib;
 961         if (rf->rf_calib != 0xffff) {
 962                 DPRINTF(sc, BWI_DBG_RF | BWI_DBG_INIT,
 963                         "RF calibration value: 0x%04x\n", rf->rf_calib);
 964                 rf->rf_flags |= BWI_RF_F_INITED;
 965         }
 966
 967         /*
 968          * Restore trashes registers
 969          */
 970         PHY_WRITE(mac, save_phy_regs_comm[0], save_phy_comm[0]);
 971
 972         for (i = 0; i < SAVE_RF_MAX; ++i) {
 973                 int pos = (i + 1) % SAVE_RF_MAX;
 974
 975                 RF_WRITE(mac, save_rf_regs[pos], save_rf[pos]);
 976         }
 977         for (i = 1; i < SAVE_PHY_COMM_MAX; ++i)
 978                 PHY_WRITE(mac, save_phy_regs_comm[i], save_phy_comm[i]);
 979
 980         CSR_WRITE_2(sc, BWI_BBP_ATTEN, bbp_atten);
 981         if (phy->phy_version != 0)
 982                 CSR_WRITE_2(sc, BWI_RF_CHAN_EX, rf_chan_ex);
 983
 984         PHY_WRITE(mac, 0x35, phyr_35);
 985         bwi_rf_work_around(mac, rf->rf_curchan);
 986
 987         if (phy->phy_mode == IEEE80211_MODE_11B) {
 988                 PHY_WRITE(mac, 0x30, phyr_30);
 989                 CSR_WRITE_2(sc, BWI_BPHY_CTRL, bphy_ctrl);
 990         } else if ((phy->phy_flags & BWI_PHY_F_LINKED) || phy->phy_rev >= 2) {
 991                 /* XXX Spec only says when PHY is linked (gmode) */
 992                 CSR_CLRBITS_2(sc, BWI_RF_ANTDIV, 0x8000);
 993
 994                 for (i = 0; i < SAVE_PHY_11G_MAX; ++i) {
 995                         PHY_WRITE(mac, save_phy_regs_11g[i],
 996                                   save_phy_11g[i]);
 997                 }
 998
 999                 PHY_WRITE(mac, 0x80f, phyr_80f);
1000                 PHY_WRITE(mac, 0x810, phyr_810);
1001         }
1002
1003 #undef SAVE_PHY_11G_MAX
1004 #undef SAVE_PHY_COMM_MAX
1005 #undef SAVE_RF_MAX
1006 }
1007
1008 static uint16_t
1009 bwi_rf_calibval(struct bwi_mac *mac)
1010 {
1011         /* http://bcm-specs.sipsolutions.net/RCCTable */
1012         static const uint16_t rf_calibvals[] = {
1013                 0x2, 0x3, 0x1, 0xf, 0x6, 0x7, 0x5, 0xf,
1014                 0xa, 0xb, 0x9, 0xf, 0xe, 0xf, 0xd, 0xf
1015         };
1016         uint16_t val, calib;
1017         int idx;
1018
1019         val = RF_READ(mac, BWI_RFR_BBP_ATTEN);
1020         idx = __SHIFTOUT(val, BWI_RFR_BBP_ATTEN_CALIB_IDX);
1021         KASSERT(idx < (int)nitems(rf_calibvals), ("idx %d", idx));
1022
1023         calib = rf_calibvals[idx] << 1;
1024         if (val & BWI_RFR_BBP_ATTEN_CALIB_BIT)
1025                 calib |= 0x1;
1026         calib |= 0x20;
1027
1028         return calib;
1029 }
1030
1031 static __inline int32_t
1032 _bwi_adjust_devide(int32_t num, int32_t den)
1033 {
1034         if (num < 0)
1035                 return (num / den);
1036         else
1037                 return (num + den / 2) / den;
1038 }
1039
1040 /*
1041  * http://bcm-specs.sipsolutions.net/TSSI_to_DBM_Table
1042  * "calculating table entries"
1043  */
1044 static int
1045 bwi_rf_calc_txpower(int8_t *txpwr, uint8_t idx, const int16_t pa_params[])
1046 {
1047         int32_t m1, m2, f, dbm;
1048         int i;
1049
1050         m1 = _bwi_adjust_devide(16 * pa_params[0] + idx * pa_params[1], 32);
1051         m2 = imax(_bwi_adjust_devide(32768 + idx * pa_params[2], 256), 1);
1052
1053 #define ITER_MAX        16
1054
1055         f = 256;
1056         for (i = 0; i < ITER_MAX; ++i) {
1057                 int32_t q, d;
1058
1059                 q = _bwi_adjust_devide(
1060                         f * 4096 - _bwi_adjust_devide(m2 * f, 16) * f, 2048);
1061                 d = abs(q - f);
1062                 f = q;
1063
1064                 if (d < 2)
1065                         break;
1066         }
1067         if (i == ITER_MAX)
1068                 return EINVAL;
1069
1070 #undef ITER_MAX
1071
1072         dbm = _bwi_adjust_devide(m1 * f, 8192);
1073         if (dbm < -127)
1074                 dbm = -127;
1075         else if (dbm > 128)
1076                 dbm = 128;
1077
1078         *txpwr = dbm;
1079         return 0;
1080 }
1081
1082 int
1083 bwi_rf_map_txpower(struct bwi_mac *mac)
1084 {
1085         struct bwi_softc *sc = mac->mac_sc;
1086         struct bwi_rf *rf = &mac->mac_rf;
1087         struct bwi_phy *phy = &mac->mac_phy;
1088         uint16_t sprom_ofs, val, mask;
1089         int16_t pa_params[3];
1090         int error = 0, i, ant_gain, reg_txpower_max;
1091
1092         /*
1093          * Find out max TX power
1094          */
1095         val = bwi_read_sprom(sc, BWI_SPROM_MAX_TXPWR);
1096         if (phy->phy_mode == IEEE80211_MODE_11A) {
1097                 rf->rf_txpower_max = __SHIFTOUT(val,
1098                                      BWI_SPROM_MAX_TXPWR_MASK_11A);
1099         } else {
1100                 rf->rf_txpower_max = __SHIFTOUT(val,
1101                                      BWI_SPROM_MAX_TXPWR_MASK_11BG);
1102
1103                 if ((sc->sc_card_flags & BWI_CARD_F_PA_GPIO9) &&
1104                     phy->phy_mode == IEEE80211_MODE_11G)
1105                         rf->rf_txpower_max -= 3;
1106         }
1107         if (rf->rf_txpower_max <= 0) {
1108                 device_printf(sc->sc_dev, "invalid max txpower in sprom\n");
1109                 rf->rf_txpower_max = 74;
1110         }
1111         DPRINTF(sc, BWI_DBG_RF | BWI_DBG_TXPOWER | BWI_DBG_ATTACH,
1112                 "max txpower from sprom: %d dBm\n", rf->rf_txpower_max);
1113
1114         /*
1115          * Find out region/domain max TX power, which is adjusted
1116          * by antenna gain and 1.5 dBm fluctuation as mentioned
1117          * in v3 spec.
1118          */
1119         val = bwi_read_sprom(sc, BWI_SPROM_ANT_GAIN);
1120         if (phy->phy_mode == IEEE80211_MODE_11A)
1121                 ant_gain = __SHIFTOUT(val, BWI_SPROM_ANT_GAIN_MASK_11A);
1122         else
1123                 ant_gain = __SHIFTOUT(val, BWI_SPROM_ANT_GAIN_MASK_11BG);
1124         if (ant_gain == 0xff) {
1125                 device_printf(sc->sc_dev, "invalid antenna gain in sprom\n");
1126                 ant_gain = 2;
1127         }
1128         ant_gain *= 4;
1129         DPRINTF(sc, BWI_DBG_RF | BWI_DBG_TXPOWER | BWI_DBG_ATTACH,
1130                 "ant gain %d dBm\n", ant_gain);
1131
1132         reg_txpower_max = 90 - ant_gain - 6;    /* XXX magic number */
1133         DPRINTF(sc, BWI_DBG_RF | BWI_DBG_TXPOWER | BWI_DBG_ATTACH,
1134                 "region/domain max txpower %d dBm\n", reg_txpower_max);
1135
1136         /*
1137          * Force max TX power within region/domain TX power limit
1138          */
1139         if (rf->rf_txpower_max > reg_txpower_max)
1140                 rf->rf_txpower_max = reg_txpower_max;
1141         DPRINTF(sc, BWI_DBG_RF | BWI_DBG_TXPOWER | BWI_DBG_ATTACH,
1142                 "max txpower %d dBm\n", rf->rf_txpower_max);
1143
1144         /*
1145          * Create TSSI to TX power mapping
1146          */
1147
1148         if (sc->sc_bbp_id == BWI_BBPID_BCM4301 &&
1149             rf->rf_type != BWI_RF_T_BCM2050) {
1150                 rf->rf_idle_tssi0 = BWI_DEFAULT_IDLE_TSSI;
1151                 bcopy(bwi_txpower_map_11b, rf->rf_txpower_map0,
1152                       sizeof(rf->rf_txpower_map0));
1153                 goto back;
1154         }
1155
1156 #define IS_VALID_PA_PARAM(p)    ((p) != 0 && (p) != -1)
1157
1158         /*
1159          * Extract PA parameters
1160          */
1161         if (phy->phy_mode == IEEE80211_MODE_11A)
1162                 sprom_ofs = BWI_SPROM_PA_PARAM_11A;
1163         else
1164                 sprom_ofs = BWI_SPROM_PA_PARAM_11BG;
1165         for (i = 0; i < nitems(pa_params); ++i)
1166                 pa_params[i] = (int16_t)bwi_read_sprom(sc, sprom_ofs + (i * 2));
1167
1168         for (i = 0; i < nitems(pa_params); ++i) {
1169                 /*
1170                  * If one of the PA parameters from SPROM is not valid,
1171                  * fall back to the default values, if there are any.
1172                  */
1173                 if (!IS_VALID_PA_PARAM(pa_params[i])) {
1174                         const int8_t *txpower_map;
1175
1176                         if (phy->phy_mode == IEEE80211_MODE_11A) {
1177                                 device_printf(sc->sc_dev,
1178                                           "no tssi2dbm table for 11a PHY\n");
1179                                 return ENXIO;
1180                         }
1181
1182                         if (phy->phy_mode == IEEE80211_MODE_11G) {
1183                                 DPRINTF(sc,
1184                                 BWI_DBG_RF | BWI_DBG_TXPOWER | BWI_DBG_ATTACH,
1185                                 "%s\n", "use default 11g TSSI map");
1186                                 txpower_map = bwi_txpower_map_11g;
1187                         } else {
1188                                 DPRINTF(sc,
1189                                 BWI_DBG_RF | BWI_DBG_TXPOWER | BWI_DBG_ATTACH,
1190                                 "%s\n", "use default 11b TSSI map");
1191                                 txpower_map = bwi_txpower_map_11b;
1192                         }
1193
1194                         rf->rf_idle_tssi0 = BWI_DEFAULT_IDLE_TSSI;
1195                         bcopy(txpower_map, rf->rf_txpower_map0,
1196                               sizeof(rf->rf_txpower_map0));
1197                         goto back;
1198                 }
1199         }
1200
1201         /*
1202          * All of the PA parameters from SPROM are valid.
1203          */
1204
1205         /*
1206          * Extract idle TSSI from SPROM.
1207          */
1208         val = bwi_read_sprom(sc, BWI_SPROM_IDLE_TSSI);
1209         DPRINTF(sc, BWI_DBG_RF | BWI_DBG_TXPOWER | BWI_DBG_ATTACH,
1210                 "sprom idle tssi: 0x%04x\n", val);
1211
1212         if (phy->phy_mode == IEEE80211_MODE_11A)
1213                 mask = BWI_SPROM_IDLE_TSSI_MASK_11A;
1214         else
1215                 mask = BWI_SPROM_IDLE_TSSI_MASK_11BG;
1216
1217         rf->rf_idle_tssi0 = (int)__SHIFTOUT(val, mask);
1218         if (!IS_VALID_PA_PARAM(rf->rf_idle_tssi0))
1219                 rf->rf_idle_tssi0 = 62;
1220
1221 #undef IS_VALID_PA_PARAM
1222
1223         /*
1224          * Calculate TX power map, which is indexed by TSSI
1225          */
1226         DPRINTF(sc, BWI_DBG_RF | BWI_DBG_ATTACH | BWI_DBG_TXPOWER,
1227                 "%s\n", "TSSI-TX power map:");
1228         for (i = 0; i < BWI_TSSI_MAX; ++i) {
1229                 error = bwi_rf_calc_txpower(&rf->rf_txpower_map0[i], i,
1230                                             pa_params);
1231                 if (error) {
1232                         device_printf(sc->sc_dev,
1233                                   "bwi_rf_calc_txpower failed\n");
1234                         break;
1235                 }
1236
1237 #ifdef BWI_DEBUG
1238                 if (i != 0 && i % 8 == 0) {
1239                         _DPRINTF(sc,
1240                         BWI_DBG_RF | BWI_DBG_ATTACH | BWI_DBG_TXPOWER,
1241                         "%s\n", "");
1242                 }
1243 #endif
1244                 _DPRINTF(sc, BWI_DBG_RF | BWI_DBG_ATTACH | BWI_DBG_TXPOWER,
1245                          "%d ", rf->rf_txpower_map0[i]);
1246         }
1247         _DPRINTF(sc, BWI_DBG_RF | BWI_DBG_ATTACH | BWI_DBG_TXPOWER,
1248                  "%s\n", "");
1249 back:
1250         DPRINTF(sc, BWI_DBG_RF | BWI_DBG_TXPOWER | BWI_DBG_ATTACH,
1251                 "idle tssi0: %d\n", rf->rf_idle_tssi0);
1252         return error;
1253 }
1254
1255 static void
1256 bwi_rf_lo_update_11g(struct bwi_mac *mac)
1257 {
1258         struct bwi_softc *sc = mac->mac_sc;
1259         struct bwi_rf *rf = &mac->mac_rf;
1260         struct bwi_phy *phy = &mac->mac_phy;
1261         struct bwi_tpctl *tpctl = &mac->mac_tpctl;
1262         struct rf_saveregs regs;
1263         uint16_t ant_div, chan_ex;
1264         uint8_t devi_ctrl;
1265         u_int orig_chan;
1266
1267         /*
1268          * Save RF/PHY registers for later restoration
1269          */
1270         orig_chan = rf->rf_curchan;
1271         bzero(&regs, sizeof(regs));
1272
1273         if (phy->phy_flags & BWI_PHY_F_LINKED) {
1274                 SAVE_PHY_REG(mac, &regs, 429);
1275                 SAVE_PHY_REG(mac, &regs, 802);
1276
1277                 PHY_WRITE(mac, 0x429, regs.phy_429 & 0x7fff);
1278                 PHY_WRITE(mac, 0x802, regs.phy_802 & 0xfffc);
1279         }
1280
1281         ant_div = CSR_READ_2(sc, BWI_RF_ANTDIV);
1282         CSR_WRITE_2(sc, BWI_RF_ANTDIV, ant_div | 0x8000);
1283         chan_ex = CSR_READ_2(sc, BWI_RF_CHAN_EX);
1284
1285         SAVE_PHY_REG(mac, &regs, 15);
1286         SAVE_PHY_REG(mac, &regs, 2a);
1287         SAVE_PHY_REG(mac, &regs, 35);
1288         SAVE_PHY_REG(mac, &regs, 60);
1289         SAVE_RF_REG(mac, &regs, 43);
1290         SAVE_RF_REG(mac, &regs, 7a);
1291         SAVE_RF_REG(mac, &regs, 52);
1292         if (phy->phy_flags & BWI_PHY_F_LINKED) {
1293                 SAVE_PHY_REG(mac, &regs, 811);
1294                 SAVE_PHY_REG(mac, &regs, 812);
1295                 SAVE_PHY_REG(mac, &regs, 814);
1296                 SAVE_PHY_REG(mac, &regs, 815);
1297         }
1298
1299         /* Force to channel 6 */
1300         bwi_rf_set_chan(mac, 6, 0);
1301
1302         if (phy->phy_flags & BWI_PHY_F_LINKED) {
1303                 PHY_WRITE(mac, 0x429, regs.phy_429 & 0x7fff);
1304                 PHY_WRITE(mac, 0x802, regs.phy_802 & 0xfffc);
1305                 bwi_mac_dummy_xmit(mac);
1306         }
1307         RF_WRITE(mac, 0x43, 0x6);
1308
1309         bwi_phy_set_bbp_atten(mac, 2);
1310
1311         CSR_WRITE_2(sc, BWI_RF_CHAN_EX, 0);
1312
1313         PHY_WRITE(mac, 0x2e, 0x7f);
1314         PHY_WRITE(mac, 0x80f, 0x78);
1315         PHY_WRITE(mac, 0x35, regs.phy_35 & 0xff7f);
1316         RF_WRITE(mac, 0x7a, regs.rf_7a & 0xfff0);
1317         PHY_WRITE(mac, 0x2b, 0x203);
1318         PHY_WRITE(mac, 0x2a, 0x8a3);
1319
1320         if (phy->phy_flags & BWI_PHY_F_LINKED) {
1321                 PHY_WRITE(mac, 0x814, regs.phy_814 | 0x3);
1322                 PHY_WRITE(mac, 0x815, regs.phy_815 & 0xfffc);
1323                 PHY_WRITE(mac, 0x811, 0x1b3);
1324                 PHY_WRITE(mac, 0x812, 0xb2);
1325         }
1326
1327         if ((sc->sc_flags & BWI_F_RUNNING) == 0)
1328                 tpctl->tp_ctrl2 = bwi_rf_get_tp_ctrl2(mac);
1329         PHY_WRITE(mac, 0x80f, 0x8078);
1330
1331         /*
1332          * Measure all RF LO
1333          */
1334         devi_ctrl = _bwi_rf_lo_update_11g(mac, regs.rf_7a);
1335
1336         /*
1337          * Restore saved RF/PHY registers
1338          */
1339         if (phy->phy_flags & BWI_PHY_F_LINKED) {
1340                 PHY_WRITE(mac, 0x15, 0xe300);
1341                 PHY_WRITE(mac, 0x812, (devi_ctrl << 8) | 0xa0);
1342                 DELAY(5);
1343                 PHY_WRITE(mac, 0x812, (devi_ctrl << 8) | 0xa2);
1344                 DELAY(2);
1345                 PHY_WRITE(mac, 0x812, (devi_ctrl << 8) | 0xa3);
1346         } else {
1347                 PHY_WRITE(mac, 0x15, devi_ctrl | 0xefa0);
1348         }
1349
1350         if ((sc->sc_flags & BWI_F_RUNNING) == 0)
1351                 tpctl = NULL;
1352         bwi_rf_lo_adjust(mac, tpctl);
1353
1354         PHY_WRITE(mac, 0x2e, 0x807f);
1355         if (phy->phy_flags & BWI_PHY_F_LINKED)
1356                 PHY_WRITE(mac, 0x2f, 0x202);
1357         else
1358                 PHY_WRITE(mac, 0x2f, 0x101);
1359
1360         CSR_WRITE_2(sc, BWI_RF_CHAN_EX, chan_ex);
1361
1362         RESTORE_PHY_REG(mac, &regs, 15);
1363         RESTORE_PHY_REG(mac, &regs, 2a);
1364         RESTORE_PHY_REG(mac, &regs, 35);
1365         RESTORE_PHY_REG(mac, &regs, 60);
1366
1367         RESTORE_RF_REG(mac, &regs, 43);
1368         RESTORE_RF_REG(mac, &regs, 7a);
1369
1370         regs.rf_52 &= 0xf0;
1371         regs.rf_52 |= (RF_READ(mac, 0x52) & 0xf);
1372         RF_WRITE(mac, 0x52, regs.rf_52);
1373
1374         CSR_WRITE_2(sc, BWI_RF_ANTDIV, ant_div);
1375
1376         if (phy->phy_flags & BWI_PHY_F_LINKED) {
1377                 RESTORE_PHY_REG(mac, &regs, 811);
1378                 RESTORE_PHY_REG(mac, &regs, 812);
1379                 RESTORE_PHY_REG(mac, &regs, 814);
1380                 RESTORE_PHY_REG(mac, &regs, 815);
1381                 RESTORE_PHY_REG(mac, &regs, 429);
1382                 RESTORE_PHY_REG(mac, &regs, 802);
1383         }
1384
1385         bwi_rf_set_chan(mac, orig_chan, 1);
1386 }
1387
1388 static uint32_t
1389 bwi_rf_lo_devi_measure(struct bwi_mac *mac, uint16_t ctrl)
1390 {
1391         struct bwi_phy *phy = &mac->mac_phy;
1392         uint32_t devi = 0;
1393         int i;
1394
1395         if (phy->phy_flags & BWI_PHY_F_LINKED)
1396                 ctrl <<= 8;
1397
1398         for (i = 0; i < 8; ++i) {
1399                 if (phy->phy_flags & BWI_PHY_F_LINKED) {
1400                         PHY_WRITE(mac, 0x15, 0xe300);
1401                         PHY_WRITE(mac, 0x812, ctrl | 0xb0);
1402                         DELAY(5);
1403                         PHY_WRITE(mac, 0x812, ctrl | 0xb2);
1404                         DELAY(2);
1405                         PHY_WRITE(mac, 0x812, ctrl | 0xb3);
1406                         DELAY(4);
1407                         PHY_WRITE(mac, 0x15, 0xf300);
1408                 } else {
1409                         PHY_WRITE(mac, 0x15, ctrl | 0xefa0);
1410                         DELAY(2);
1411                         PHY_WRITE(mac, 0x15, ctrl | 0xefe0);
1412                         DELAY(4);
1413                         PHY_WRITE(mac, 0x15, ctrl | 0xffe0);
1414                 }
1415                 DELAY(8);
1416                 devi += PHY_READ(mac, 0x2d);
1417         }
1418         return devi;
1419 }
1420
1421 static uint16_t
1422 bwi_rf_get_tp_ctrl2(struct bwi_mac *mac)
1423 {
1424         uint32_t devi_min;
1425         uint16_t tp_ctrl2 = 0;
1426         int i;
1427
1428         RF_WRITE(mac, 0x52, 0);
1429         DELAY(10);
1430         devi_min = bwi_rf_lo_devi_measure(mac, 0);
1431
1432         for (i = 0; i < 16; ++i) {
1433                 uint32_t devi;
1434
1435                 RF_WRITE(mac, 0x52, i);
1436                 DELAY(10);
1437                 devi = bwi_rf_lo_devi_measure(mac, 0);
1438
1439                 if (devi < devi_min) {
1440                         devi_min = devi;
1441                         tp_ctrl2 = i;
1442                 }
1443         }
1444         return tp_ctrl2;
1445 }
1446
1447 static uint8_t
1448 _bwi_rf_lo_update_11g(struct bwi_mac *mac, uint16_t orig_rf7a)
1449 {
1450 #define RF_ATTEN_LISTSZ 14
1451 #define BBP_ATTEN_MAX   4       /* half */
1452
1453         static const int rf_atten_list[RF_ATTEN_LISTSZ] =
1454         { 3, 1, 5, 7, 9, 2, 0, 4, 6, 8, 1, 2, 3, 4 };
1455         static const int rf_atten_init_list[RF_ATTEN_LISTSZ] =
1456         { 0, 3, 1, 5, 7, 3, 2, 0, 4, 6, -1, -1, -1, -1 };
1457         static const int rf_lo_measure_order[RF_ATTEN_LISTSZ] =
1458         { 3, 1, 5, 7, 9, 2, 0, 4, 6, 8, 10, 11, 12, 13 };
1459
1460         struct bwi_softc *sc = mac->mac_sc;
1461         struct bwi_rf_lo lo_save, *lo;
1462         uint8_t devi_ctrl = 0;
1463         int idx, adj_rf7a = 0;
1464
1465         bzero(&lo_save, sizeof(lo_save));
1466         for (idx = 0; idx < RF_ATTEN_LISTSZ; ++idx) {
1467                 int init_rf_atten = rf_atten_init_list[idx];
1468                 int rf_atten = rf_atten_list[idx];
1469                 int bbp_atten;
1470
1471                 for (bbp_atten = 0; bbp_atten < BBP_ATTEN_MAX; ++bbp_atten) {
1472                         uint16_t tp_ctrl2, rf7a;
1473
1474                         if ((sc->sc_flags & BWI_F_RUNNING) == 0) {
1475                                 if (idx == 0) {
1476                                         bzero(&lo_save, sizeof(lo_save));
1477                                 } else if (init_rf_atten < 0) {
1478                                         lo = bwi_get_rf_lo(mac,
1479                                                 rf_atten, 2 * bbp_atten);
1480                                         bcopy(lo, &lo_save, sizeof(lo_save));
1481                                 } else {
1482                                         lo = bwi_get_rf_lo(mac,
1483                                                 init_rf_atten, 0);
1484                                         bcopy(lo, &lo_save, sizeof(lo_save));
1485                                 }
1486
1487                                 devi_ctrl = 0;
1488                                 adj_rf7a = 0;
1489
1490                                 /*
1491                                  * XXX
1492                                  * Linux driver overflows 'val'
1493                                  */
1494                                 if (init_rf_atten >= 0) {
1495                                         int val;
1496
1497                                         val = rf_atten * 2 + bbp_atten;
1498                                         if (val > 14) {
1499                                                 adj_rf7a = 1;
1500                                                 if (val > 17)
1501                                                         devi_ctrl = 1;
1502                                                 if (val > 19)
1503                                                         devi_ctrl = 2;
1504                                         }
1505                                 }
1506                         } else {
1507                                 lo = bwi_get_rf_lo(mac,
1508                                         rf_atten, 2 * bbp_atten);
1509                                 if (!bwi_rf_lo_isused(mac, lo))
1510                                         continue;
1511                                 bcopy(lo, &lo_save, sizeof(lo_save));
1512
1513                                 devi_ctrl = 3;
1514                                 adj_rf7a = 0;
1515                         }
1516
1517                         RF_WRITE(mac, BWI_RFR_ATTEN, rf_atten);
1518
1519                         tp_ctrl2 = mac->mac_tpctl.tp_ctrl2;
1520                         if (init_rf_atten < 0)
1521                                 tp_ctrl2 |= (3 << 4);
1522                         RF_WRITE(mac, BWI_RFR_TXPWR, tp_ctrl2);
1523
1524                         DELAY(10);
1525
1526                         bwi_phy_set_bbp_atten(mac, bbp_atten * 2);
1527
1528                         rf7a = orig_rf7a & 0xfff0;
1529                         if (adj_rf7a)
1530                                 rf7a |= 0x8;
1531                         RF_WRITE(mac, 0x7a, rf7a);
1532
1533                         lo = bwi_get_rf_lo(mac,
1534                                 rf_lo_measure_order[idx], bbp_atten * 2);
1535                         bwi_rf_lo_measure_11g(mac, &lo_save, lo, devi_ctrl);
1536                 }
1537         }
1538         return devi_ctrl;
1539
1540 #undef RF_ATTEN_LISTSZ
1541 #undef BBP_ATTEN_MAX
1542 }
1543
1544 static void
1545 bwi_rf_lo_measure_11g(struct bwi_mac *mac, const struct bwi_rf_lo *src_lo,
1546         struct bwi_rf_lo *dst_lo, uint8_t devi_ctrl)
1547 {
1548 #define LO_ADJUST_MIN   1
1549 #define LO_ADJUST_MAX   8
1550 #define LO_ADJUST(hi, lo)       { .ctrl_hi = hi, .ctrl_lo = lo }
1551         static const struct bwi_rf_lo rf_lo_adjust[LO_ADJUST_MAX] = {
1552                 LO_ADJUST(1,    1),
1553                 LO_ADJUST(1,    0),
1554                 LO_ADJUST(1,    -1),
1555                 LO_ADJUST(0,    -1),
1556                 LO_ADJUST(-1,   -1),
1557                 LO_ADJUST(-1,   0),
1558                 LO_ADJUST(-1,   1),
1559                 LO_ADJUST(0,    1)
1560         };
1561 #undef LO_ADJUST
1562
1563         struct bwi_rf_lo lo_min;
1564         uint32_t devi_min;
1565         int found, loop_count, adjust_state;
1566
1567         bcopy(src_lo, &lo_min, sizeof(lo_min));
1568         RF_LO_WRITE(mac, &lo_min);
1569         devi_min = bwi_rf_lo_devi_measure(mac, devi_ctrl);
1570
1571         loop_count = 12;        /* XXX */
1572         adjust_state = 0;
1573         do {
1574                 struct bwi_rf_lo lo_base;
1575                 int i, fin;
1576
1577                 found = 0;
1578                 if (adjust_state == 0) {
1579                         i = LO_ADJUST_MIN;
1580                         fin = LO_ADJUST_MAX;
1581                 } else if (adjust_state % 2 == 0) {
1582                         i = adjust_state - 1;
1583                         fin = adjust_state + 1;
1584                 } else {
1585                         i = adjust_state - 2;
1586                         fin = adjust_state + 2;
1587                 }
1588
1589                 if (i < LO_ADJUST_MIN)
1590                         i += LO_ADJUST_MAX;
1591                 KASSERT(i <= LO_ADJUST_MAX && i >= LO_ADJUST_MIN, ("i %d", i));
1592
1593                 if (fin > LO_ADJUST_MAX)
1594                         fin -= LO_ADJUST_MAX;
1595                 KASSERT(fin <= LO_ADJUST_MAX && fin >= LO_ADJUST_MIN,
1596                     ("fin %d", fin));
1597
1598                 bcopy(&lo_min, &lo_base, sizeof(lo_base));
1599                 for (;;) {
1600                         struct bwi_rf_lo lo;
1601
1602                         lo.ctrl_hi = lo_base.ctrl_hi +
1603                                 rf_lo_adjust[i - 1].ctrl_hi;
1604                         lo.ctrl_lo = lo_base.ctrl_lo +
1605                                 rf_lo_adjust[i - 1].ctrl_lo;
1606
1607                         if (abs(lo.ctrl_lo) < 9 && abs(lo.ctrl_hi) < 9) {
1608                                 uint32_t devi;
1609
1610                                 RF_LO_WRITE(mac, &lo);
1611                                 devi = bwi_rf_lo_devi_measure(mac, devi_ctrl);
1612                                 if (devi < devi_min) {
1613                                         devi_min = devi;
1614                                         adjust_state = i;
1615                                         found = 1;
1616                                         bcopy(&lo, &lo_min, sizeof(lo_min));
1617                                 }
1618                         }
1619                         if (i == fin)
1620                                 break;
1621                         if (i == LO_ADJUST_MAX)
1622                                 i = LO_ADJUST_MIN;
1623                         else
1624                                 ++i;
1625                 }
1626         } while (loop_count-- && found);
1627
1628         bcopy(&lo_min, dst_lo, sizeof(*dst_lo));
1629
1630 #undef LO_ADJUST_MIN
1631 #undef LO_ADJUST_MAX
1632 }
1633
1634 static void
1635 bwi_rf_calc_nrssi_slope_11b(struct bwi_mac *mac)
1636 {
1637 #define SAVE_RF_MAX     3
1638 #define SAVE_PHY_MAX    8
1639
1640         static const uint16_t save_rf_regs[SAVE_RF_MAX] =
1641         { 0x7a, 0x52, 0x43 };
1642         static const uint16_t save_phy_regs[SAVE_PHY_MAX] =
1643         { 0x30, 0x26, 0x15, 0x2a, 0x20, 0x5a, 0x59, 0x58 };
1644
1645         struct bwi_softc *sc = mac->mac_sc;
1646         struct bwi_rf *rf = &mac->mac_rf;
1647         struct bwi_phy *phy = &mac->mac_phy;
1648         uint16_t save_rf[SAVE_RF_MAX];
1649         uint16_t save_phy[SAVE_PHY_MAX];
1650         uint16_t ant_div, bbp_atten, chan_ex;
1651         int16_t nrssi[2];
1652         int i;
1653
1654         /*
1655          * Save RF/PHY registers for later restoration
1656          */
1657         for (i = 0; i < SAVE_RF_MAX; ++i)
1658                 save_rf[i] = RF_READ(mac, save_rf_regs[i]);
1659         for (i = 0; i < SAVE_PHY_MAX; ++i)
1660                 save_phy[i] = PHY_READ(mac, save_phy_regs[i]);
1661
1662         ant_div = CSR_READ_2(sc, BWI_RF_ANTDIV);
1663         bbp_atten = CSR_READ_2(sc, BWI_BBP_ATTEN);
1664         chan_ex = CSR_READ_2(sc, BWI_RF_CHAN_EX);
1665
1666         /*
1667          * Calculate nrssi0
1668          */
1669         if (phy->phy_rev >= 5)
1670                 RF_CLRBITS(mac, 0x7a, 0xff80);
1671         else
1672                 RF_CLRBITS(mac, 0x7a, 0xfff0);
1673         PHY_WRITE(mac, 0x30, 0xff);
1674
1675         CSR_WRITE_2(sc, BWI_BPHY_CTRL, 0x7f7f);
1676
1677         PHY_WRITE(mac, 0x26, 0);
1678         PHY_SETBITS(mac, 0x15, 0x20);
1679         PHY_WRITE(mac, 0x2a, 0x8a3);
1680         RF_SETBITS(mac, 0x7a, 0x80);
1681
1682         nrssi[0] = (int16_t)PHY_READ(mac, 0x27);
1683
1684         /*
1685          * Calculate nrssi1
1686          */
1687         RF_CLRBITS(mac, 0x7a, 0xff80);
1688         if (phy->phy_version >= 2)
1689                 CSR_WRITE_2(sc, BWI_BBP_ATTEN, 0x40);
1690         else if (phy->phy_version == 0)
1691                 CSR_WRITE_2(sc, BWI_BBP_ATTEN, 0x122);
1692         else
1693                 CSR_CLRBITS_2(sc, BWI_RF_CHAN_EX, 0xdfff);
1694
1695         PHY_WRITE(mac, 0x20, 0x3f3f);
1696         PHY_WRITE(mac, 0x15, 0xf330);
1697
1698         RF_WRITE(mac, 0x5a, 0x60);
1699         RF_CLRBITS(mac, 0x43, 0xff0f);
1700
1701         PHY_WRITE(mac, 0x5a, 0x480);
1702         PHY_WRITE(mac, 0x59, 0x810);
1703         PHY_WRITE(mac, 0x58, 0xd);
1704
1705         DELAY(20);
1706
1707         nrssi[1] = (int16_t)PHY_READ(mac, 0x27);
1708
1709         /*
1710          * Restore saved RF/PHY registers
1711          */
1712         PHY_WRITE(mac, save_phy_regs[0], save_phy[0]);
1713         RF_WRITE(mac, save_rf_regs[0], save_rf[0]);
1714
1715         CSR_WRITE_2(sc, BWI_RF_ANTDIV, ant_div);
1716
1717         for (i = 1; i < 4; ++i)
1718                 PHY_WRITE(mac, save_phy_regs[i], save_phy[i]);
1719
1720         bwi_rf_work_around(mac, rf->rf_curchan);
1721
1722         if (phy->phy_version != 0)
1723                 CSR_WRITE_2(sc, BWI_RF_CHAN_EX, chan_ex);
1724
1725         for (; i < SAVE_PHY_MAX; ++i)
1726                 PHY_WRITE(mac, save_phy_regs[i], save_phy[i]);
1727
1728         for (i = 1; i < SAVE_RF_MAX; ++i)
1729                 RF_WRITE(mac, save_rf_regs[i], save_rf[i]);
1730
1731         /*
1732          * Install calculated narrow RSSI values
1733          */
1734         if (nrssi[0] == nrssi[1])
1735                 rf->rf_nrssi_slope = 0x10000;
1736         else
1737                 rf->rf_nrssi_slope = 0x400000 / (nrssi[0] - nrssi[1]);
1738         if (nrssi[0] <= -4) {
1739                 rf->rf_nrssi[0] = nrssi[0];
1740                 rf->rf_nrssi[1] = nrssi[1];
1741         }
1742
1743 #undef SAVE_RF_MAX
1744 #undef SAVE_PHY_MAX
1745 }
1746
1747 static void
1748 bwi_rf_set_nrssi_ofs_11g(struct bwi_mac *mac)
1749 {
1750 #define SAVE_RF_MAX             2
1751 #define SAVE_PHY_COMM_MAX       10
1752 #define SAVE_PHY6_MAX           8
1753
1754         static const uint16_t save_rf_regs[SAVE_RF_MAX] =
1755         { 0x7a, 0x43 };
1756         static const uint16_t save_phy_comm_regs[SAVE_PHY_COMM_MAX] = {
1757                 0x0001, 0x0811, 0x0812, 0x0814,
1758                 0x0815, 0x005a, 0x0059, 0x0058,
1759                 0x000a, 0x0003
1760         };
1761         static const uint16_t save_phy6_regs[SAVE_PHY6_MAX] = {
1762                 0x002e, 0x002f, 0x080f, 0x0810,
1763                 0x0801, 0x0060, 0x0014, 0x0478
1764         };
1765
1766         struct bwi_phy *phy = &mac->mac_phy;
1767         uint16_t save_rf[SAVE_RF_MAX];
1768         uint16_t save_phy_comm[SAVE_PHY_COMM_MAX];
1769         uint16_t save_phy6[SAVE_PHY6_MAX];
1770         uint16_t rf7b = 0xffff;
1771         int16_t nrssi;
1772         int i, phy6_idx = 0;
1773
1774         for (i = 0; i < SAVE_PHY_COMM_MAX; ++i)
1775                 save_phy_comm[i] = PHY_READ(mac, save_phy_comm_regs[i]);
1776         for (i = 0; i < SAVE_RF_MAX; ++i)
1777                 save_rf[i] = RF_READ(mac, save_rf_regs[i]);
1778
1779         PHY_CLRBITS(mac, 0x429, 0x8000);
1780         PHY_FILT_SETBITS(mac, 0x1, 0x3fff, 0x4000);
1781         PHY_SETBITS(mac, 0x811, 0xc);
1782         PHY_FILT_SETBITS(mac, 0x812, 0xfff3, 0x4);
1783         PHY_CLRBITS(mac, 0x802, 0x3);
1784
1785         if (phy->phy_rev >= 6) {
1786                 for (i = 0; i < SAVE_PHY6_MAX; ++i)
1787                         save_phy6[i] = PHY_READ(mac, save_phy6_regs[i]);
1788
1789                 PHY_WRITE(mac, 0x2e, 0);
1790                 PHY_WRITE(mac, 0x2f, 0);
1791                 PHY_WRITE(mac, 0x80f, 0);
1792                 PHY_WRITE(mac, 0x810, 0);
1793                 PHY_SETBITS(mac, 0x478, 0x100);
1794                 PHY_SETBITS(mac, 0x801, 0x40);
1795                 PHY_SETBITS(mac, 0x60, 0x40);
1796                 PHY_SETBITS(mac, 0x14, 0x200);
1797         }
1798
1799         RF_SETBITS(mac, 0x7a, 0x70);
1800         RF_SETBITS(mac, 0x7a, 0x80);
1801
1802         DELAY(30);
1803
1804         nrssi = bwi_nrssi_11g(mac);
1805         if (nrssi == 31) {
1806                 for (i = 7; i >= 4; --i) {
1807                         RF_WRITE(mac, 0x7b, i);
1808                         DELAY(20);
1809                         nrssi = bwi_nrssi_11g(mac);
1810                         if (nrssi < 31 && rf7b == 0xffff)
1811                                 rf7b = i;
1812                 }
1813                 if (rf7b == 0xffff)
1814                         rf7b = 4;
1815         } else {
1816                 struct bwi_gains gains;
1817
1818                 RF_CLRBITS(mac, 0x7a, 0xff80);
1819
1820                 PHY_SETBITS(mac, 0x814, 0x1);
1821                 PHY_CLRBITS(mac, 0x815, 0x1);
1822                 PHY_SETBITS(mac, 0x811, 0xc);
1823                 PHY_SETBITS(mac, 0x812, 0xc);
1824                 PHY_SETBITS(mac, 0x811, 0x30);
1825                 PHY_SETBITS(mac, 0x812, 0x30);
1826                 PHY_WRITE(mac, 0x5a, 0x480);
1827                 PHY_WRITE(mac, 0x59, 0x810);
1828                 PHY_WRITE(mac, 0x58, 0xd);
1829                 if (phy->phy_version == 0)
1830                         PHY_WRITE(mac, 0x3, 0x122);
1831                 else
1832                         PHY_SETBITS(mac, 0xa, 0x2000);
1833                 PHY_SETBITS(mac, 0x814, 0x4);
1834                 PHY_CLRBITS(mac, 0x815, 0x4);
1835                 PHY_FILT_SETBITS(mac, 0x3, 0xff9f, 0x40);
1836                 RF_SETBITS(mac, 0x7a, 0xf);
1837
1838                 bzero(&gains, sizeof(gains));
1839                 gains.tbl_gain1 = 3;
1840                 gains.tbl_gain2 = 0;
1841                 gains.phy_gain = 1;
1842                 bwi_set_gains(mac, &gains);
1843
1844                 RF_FILT_SETBITS(mac, 0x43, 0xf0, 0xf);
1845                 DELAY(30);
1846
1847                 nrssi = bwi_nrssi_11g(mac);
1848                 if (nrssi == -32) {
1849                         for (i = 0; i < 4; ++i) {
1850                                 RF_WRITE(mac, 0x7b, i);
1851                                 DELAY(20);
1852                                 nrssi = bwi_nrssi_11g(mac);
1853                                 if (nrssi > -31 && rf7b == 0xffff)
1854                                         rf7b = i;
1855                         }
1856                         if (rf7b == 0xffff)
1857                                 rf7b = 3;
1858                 } else {
1859                         rf7b = 0;
1860                 }
1861         }
1862         RF_WRITE(mac, 0x7b, rf7b);
1863
1864         /*
1865          * Restore saved RF/PHY registers
1866          */
1867         if (phy->phy_rev >= 6) {
1868                 for (phy6_idx = 0; phy6_idx < 4; ++phy6_idx) {
1869                         PHY_WRITE(mac, save_phy6_regs[phy6_idx],
1870                                   save_phy6[phy6_idx]);
1871                 }
1872         }
1873
1874         /* Saved PHY registers 0, 1, 2 are handled later */
1875         for (i = 3; i < SAVE_PHY_COMM_MAX; ++i)
1876                 PHY_WRITE(mac, save_phy_comm_regs[i], save_phy_comm[i]);
1877
1878         for (i = SAVE_RF_MAX - 1; i >= 0; --i)
1879                 RF_WRITE(mac, save_rf_regs[i], save_rf[i]);
1880
1881         PHY_SETBITS(mac, 0x802, 0x3);
1882         PHY_SETBITS(mac, 0x429, 0x8000);
1883
1884         bwi_set_gains(mac, NULL);
1885
1886         if (phy->phy_rev >= 6) {
1887                 for (; phy6_idx < SAVE_PHY6_MAX; ++phy6_idx) {
1888                         PHY_WRITE(mac, save_phy6_regs[phy6_idx],
1889                                   save_phy6[phy6_idx]);
1890                 }
1891         }
1892
1893         PHY_WRITE(mac, save_phy_comm_regs[0], save_phy_comm[0]);
1894         PHY_WRITE(mac, save_phy_comm_regs[2], save_phy_comm[2]);
1895         PHY_WRITE(mac, save_phy_comm_regs[1], save_phy_comm[1]);
1896
1897 #undef SAVE_RF_MAX
1898 #undef SAVE_PHY_COMM_MAX
1899 #undef SAVE_PHY6_MAX
1900 }
1901
1902 static void
1903 bwi_rf_calc_nrssi_slope_11g(struct bwi_mac *mac)
1904 {
1905 #define SAVE_RF_MAX             3
1906 #define SAVE_PHY_COMM_MAX       4
1907 #define SAVE_PHY3_MAX           8
1908
1909         static const uint16_t save_rf_regs[SAVE_RF_MAX] =
1910         { 0x7a, 0x52, 0x43 };
1911         static const uint16_t save_phy_comm_regs[SAVE_PHY_COMM_MAX] =
1912         { 0x15, 0x5a, 0x59, 0x58 };
1913         static const uint16_t save_phy3_regs[SAVE_PHY3_MAX] = {
1914                 0x002e, 0x002f, 0x080f, 0x0810,
1915                 0x0801, 0x0060, 0x0014, 0x0478
1916         };
1917
1918         struct bwi_softc *sc = mac->mac_sc;
1919         struct bwi_phy *phy = &mac->mac_phy;
1920         struct bwi_rf *rf = &mac->mac_rf;
1921         uint16_t save_rf[SAVE_RF_MAX];
1922         uint16_t save_phy_comm[SAVE_PHY_COMM_MAX];
1923         uint16_t save_phy3[SAVE_PHY3_MAX];
1924         uint16_t ant_div, bbp_atten, chan_ex;
1925         struct bwi_gains gains;
1926         int16_t nrssi[2];
1927         int i, phy3_idx = 0;
1928
1929         if (rf->rf_rev >= 9)
1930                 return;
1931         else if (rf->rf_rev == 8)
1932                 bwi_rf_set_nrssi_ofs_11g(mac);
1933
1934         PHY_CLRBITS(mac, 0x429, 0x8000);
1935         PHY_CLRBITS(mac, 0x802, 0x3);
1936
1937         /*
1938          * Save RF/PHY registers for later restoration
1939          */
1940         ant_div = CSR_READ_2(sc, BWI_RF_ANTDIV);
1941         CSR_SETBITS_2(sc, BWI_RF_ANTDIV, 0x8000);
1942
1943         for (i = 0; i < SAVE_RF_MAX; ++i)
1944                 save_rf[i] = RF_READ(mac, save_rf_regs[i]);
1945         for (i = 0; i < SAVE_PHY_COMM_MAX; ++i)
1946                 save_phy_comm[i] = PHY_READ(mac, save_phy_comm_regs[i]);
1947
1948         bbp_atten = CSR_READ_2(sc, BWI_BBP_ATTEN);
1949         chan_ex = CSR_READ_2(sc, BWI_RF_CHAN_EX);
1950
1951         if (phy->phy_rev >= 3) {
1952                 for (i = 0; i < SAVE_PHY3_MAX; ++i)
1953                         save_phy3[i] = PHY_READ(mac, save_phy3_regs[i]);
1954
1955                 PHY_WRITE(mac, 0x2e, 0);
1956                 PHY_WRITE(mac, 0x810, 0);
1957
1958                 if (phy->phy_rev == 4 || phy->phy_rev == 6 ||
1959                     phy->phy_rev == 7) {
1960                         PHY_SETBITS(mac, 0x478, 0x100);
1961                         PHY_SETBITS(mac, 0x810, 0x40);
1962                 } else if (phy->phy_rev == 3 || phy->phy_rev == 5) {
1963                         PHY_CLRBITS(mac, 0x810, 0x40);
1964                 }
1965
1966                 PHY_SETBITS(mac, 0x60, 0x40);
1967                 PHY_SETBITS(mac, 0x14, 0x200);
1968         }
1969
1970         /*
1971          * Calculate nrssi0
1972          */
1973         RF_SETBITS(mac, 0x7a, 0x70);
1974
1975         bzero(&gains, sizeof(gains));
1976         gains.tbl_gain1 = 0;
1977         gains.tbl_gain2 = 8;
1978         gains.phy_gain = 0;
1979         bwi_set_gains(mac, &gains);
1980
1981         RF_CLRBITS(mac, 0x7a, 0xff08);
1982         if (phy->phy_rev >= 2) {
1983                 PHY_FILT_SETBITS(mac, 0x811, 0xffcf, 0x30);
1984                 PHY_FILT_SETBITS(mac, 0x812, 0xffcf, 0x10);
1985         }
1986
1987         RF_SETBITS(mac, 0x7a, 0x80);
1988         DELAY(20);
1989         nrssi[0] = bwi_nrssi_11g(mac);
1990
1991         /*
1992          * Calculate nrssi1
1993          */
1994         RF_CLRBITS(mac, 0x7a, 0xff80);
1995         if (phy->phy_version >= 2)
1996                 PHY_FILT_SETBITS(mac, 0x3, 0xff9f, 0x40);
1997         CSR_SETBITS_2(sc, BWI_RF_CHAN_EX, 0x2000);
1998
1999         RF_SETBITS(mac, 0x7a, 0xf);
2000         PHY_WRITE(mac, 0x15, 0xf330);
2001         if (phy->phy_rev >= 2) {
2002                 PHY_FILT_SETBITS(mac, 0x812, 0xffcf, 0x20);
2003                 PHY_FILT_SETBITS(mac, 0x811, 0xffcf, 0x20);
2004         }
2005
2006         bzero(&gains, sizeof(gains));
2007         gains.tbl_gain1 = 3;
2008         gains.tbl_gain2 = 0;
2009         gains.phy_gain = 1;
2010         bwi_set_gains(mac, &gains);
2011
2012         if (rf->rf_rev == 8) {
2013                 RF_WRITE(mac, 0x43, 0x1f);
2014         } else {
2015                 RF_FILT_SETBITS(mac, 0x52, 0xff0f, 0x60);
2016                 RF_FILT_SETBITS(mac, 0x43, 0xfff0, 0x9);
2017         }
2018         PHY_WRITE(mac, 0x5a, 0x480);
2019         PHY_WRITE(mac, 0x59, 0x810);
2020         PHY_WRITE(mac, 0x58, 0xd);
2021         DELAY(20);
2022
2023         nrssi[1] = bwi_nrssi_11g(mac);
2024
2025         /*
2026          * Install calculated narrow RSSI values
2027          */
2028         if (nrssi[1] == nrssi[0])
2029                 rf->rf_nrssi_slope = 0x10000;
2030         else
2031                 rf->rf_nrssi_slope = 0x400000 / (nrssi[0] - nrssi[1]);
2032         if (nrssi[0] >= -4) {
2033                 rf->rf_nrssi[0] = nrssi[1];
2034                 rf->rf_nrssi[1] = nrssi[0];
2035         }
2036
2037         /*
2038          * Restore saved RF/PHY registers
2039          */
2040         if (phy->phy_rev >= 3) {
2041                 for (phy3_idx = 0; phy3_idx < 4; ++phy3_idx) {
2042                         PHY_WRITE(mac, save_phy3_regs[phy3_idx],
2043                                   save_phy3[phy3_idx]);
2044                 }
2045         }
2046         if (phy->phy_rev >= 2) {
2047                 PHY_CLRBITS(mac, 0x812, 0x30);
2048                 PHY_CLRBITS(mac, 0x811, 0x30);
2049         }
2050
2051         for (i = 0; i < SAVE_RF_MAX; ++i)
2052                 RF_WRITE(mac, save_rf_regs[i], save_rf[i]);
2053
2054         CSR_WRITE_2(sc, BWI_RF_ANTDIV, ant_div);
2055         CSR_WRITE_2(sc, BWI_BBP_ATTEN, bbp_atten);
2056         CSR_WRITE_2(sc, BWI_RF_CHAN_EX, chan_ex);
2057
2058         for (i = 0; i < SAVE_PHY_COMM_MAX; ++i)
2059                 PHY_WRITE(mac, save_phy_comm_regs[i], save_phy_comm[i]);
2060
2061         bwi_rf_work_around(mac, rf->rf_curchan);
2062         PHY_SETBITS(mac, 0x802, 0x3);
2063         bwi_set_gains(mac, NULL);
2064         PHY_SETBITS(mac, 0x429, 0x8000);
2065
2066         if (phy->phy_rev >= 3) {
2067                 for (; phy3_idx < SAVE_PHY3_MAX; ++phy3_idx) {
2068                         PHY_WRITE(mac, save_phy3_regs[phy3_idx],
2069                                   save_phy3[phy3_idx]);
2070                 }
2071         }
2072
2073         bwi_rf_init_sw_nrssi_table(mac);
2074         bwi_rf_set_nrssi_thr_11g(mac);
2075
2076 #undef SAVE_RF_MAX
2077 #undef SAVE_PHY_COMM_MAX
2078 #undef SAVE_PHY3_MAX
2079 }
2080
2081 static void
2082 bwi_rf_init_sw_nrssi_table(struct bwi_mac *mac)
2083 {
2084         struct bwi_rf *rf = &mac->mac_rf;
2085         int d, i;
2086
2087         d = 0x1f - rf->rf_nrssi[0];
2088         for (i = 0; i < BWI_NRSSI_TBLSZ; ++i) {
2089                 int val;
2090
2091                 val = (((i - d) * rf->rf_nrssi_slope) / 0x10000) + 0x3a;
2092                 if (val < 0)
2093                         val = 0;
2094                 else if (val > 0x3f)
2095                         val = 0x3f;
2096
2097                 rf->rf_nrssi_table[i] = val;
2098         }
2099 }
2100
2101 void
2102 bwi_rf_init_hw_nrssi_table(struct bwi_mac *mac, uint16_t adjust)
2103 {
2104         int i;
2105
2106         for (i = 0; i < BWI_NRSSI_TBLSZ; ++i) {
2107                 int16_t val;
2108
2109                 val = bwi_nrssi_read(mac, i);
2110
2111                 val -= adjust;
2112                 if (val < -32)
2113                         val = -32;
2114                 else if (val > 31)
2115                         val = 31;
2116
2117                 bwi_nrssi_write(mac, i, val);
2118         }
2119 }
2120
2121 static void
2122 bwi_rf_set_nrssi_thr_11b(struct bwi_mac *mac)
2123 {
2124         struct bwi_rf *rf = &mac->mac_rf;
2125         int32_t thr;
2126
2127         if (rf->rf_type != BWI_RF_T_BCM2050 ||
2128             (mac->mac_sc->sc_card_flags & BWI_CARD_F_SW_NRSSI) == 0)
2129                 return;
2130
2131         /*
2132          * Calculate nrssi threshold
2133          */
2134         if (rf->rf_rev >= 6) {
2135                 thr = (rf->rf_nrssi[1] - rf->rf_nrssi[0]) * 32;
2136                 thr += 20 * (rf->rf_nrssi[0] + 1);
2137                 thr /= 40;
2138         } else {
2139                 thr = rf->rf_nrssi[1] - 5;
2140         }
2141         if (thr < 0)
2142                 thr = 0;
2143         else if (thr > 0x3e)
2144                 thr = 0x3e;
2145
2146         PHY_READ(mac, BWI_PHYR_NRSSI_THR_11B);  /* dummy read */
2147         PHY_WRITE(mac, BWI_PHYR_NRSSI_THR_11B, (((uint16_t)thr) << 8) | 0x1c);
2148
2149         if (rf->rf_rev >= 6) {
2150                 PHY_WRITE(mac, 0x87, 0xe0d);
2151                 PHY_WRITE(mac, 0x86, 0xc0b);
2152                 PHY_WRITE(mac, 0x85, 0xa09);
2153                 PHY_WRITE(mac, 0x84, 0x808);
2154                 PHY_WRITE(mac, 0x83, 0x808);
2155                 PHY_WRITE(mac, 0x82, 0x604);
2156                 PHY_WRITE(mac, 0x81, 0x302);
2157                 PHY_WRITE(mac, 0x80, 0x100);
2158         }
2159 }
2160
2161 static __inline int32_t
2162 _nrssi_threshold(const struct bwi_rf *rf, int32_t val)
2163 {
2164         val *= (rf->rf_nrssi[1] - rf->rf_nrssi[0]);
2165         val += (rf->rf_nrssi[0] << 6);
2166         if (val < 32)
2167                 val += 31;
2168         else
2169                 val += 32;
2170         val >>= 6;
2171         if (val < -31)
2172                 val = -31;
2173         else if (val > 31)
2174                 val = 31;
2175         return val;
2176 }
2177
2178 static void
2179 bwi_rf_set_nrssi_thr_11g(struct bwi_mac *mac)
2180 {
2181         int32_t thr1, thr2;
2182         uint16_t thr;
2183
2184         /*
2185          * Find the two nrssi thresholds
2186          */
2187         if ((mac->mac_phy.phy_flags & BWI_PHY_F_LINKED) == 0 ||
2188             (mac->mac_sc->sc_card_flags & BWI_CARD_F_SW_NRSSI) == 0) {
2189                 int16_t nrssi;
2190
2191                 nrssi = bwi_nrssi_read(mac, 0x20);
2192                 if (nrssi >= 32)
2193                         nrssi -= 64;
2194
2195                 if (nrssi < 3) {
2196                         thr1 = 0x2b;
2197                         thr2 = 0x27;
2198                 } else {
2199                         thr1 = 0x2d;
2200                         thr2 = 0x2b;
2201                 }
2202         } else {
2203                 /* TODO Interfere mode */
2204                 thr1 = _nrssi_threshold(&mac->mac_rf, 0x11);
2205                 thr2 = _nrssi_threshold(&mac->mac_rf, 0xe);
2206         }
2207
2208 #define NRSSI_THR1_MASK __BITS(5, 0)
2209 #define NRSSI_THR2_MASK __BITS(11, 6)
2210
2211         thr = __SHIFTIN((uint32_t)thr1, NRSSI_THR1_MASK) |
2212               __SHIFTIN((uint32_t)thr2, NRSSI_THR2_MASK);
2213         PHY_FILT_SETBITS(mac, BWI_PHYR_NRSSI_THR_11G, 0xf000, thr);
2214
2215 #undef NRSSI_THR1_MASK
2216 #undef NRSSI_THR2_MASK
2217 }
2218
2219 void
2220 bwi_rf_clear_tssi(struct bwi_mac *mac)
2221 {
2222         /* XXX use function pointer */
2223         if (mac->mac_phy.phy_mode == IEEE80211_MODE_11A) {
2224                 /* TODO:11A */
2225         } else {
2226                 uint16_t val;
2227                 int i;
2228
2229                 val = __SHIFTIN(BWI_INVALID_TSSI, BWI_LO_TSSI_MASK) |
2230                       __SHIFTIN(BWI_INVALID_TSSI, BWI_HI_TSSI_MASK);
2231
2232                 for (i = 0; i < 2; ++i) {
2233                         MOBJ_WRITE_2(mac, BWI_COMM_MOBJ,
2234                                 BWI_COMM_MOBJ_TSSI_DS + (i * 2), val);
2235                 }
2236
2237                 for (i = 0; i < 2; ++i) {
2238                         MOBJ_WRITE_2(mac, BWI_COMM_MOBJ,
2239                                 BWI_COMM_MOBJ_TSSI_OFDM + (i * 2), val);
2240                 }
2241         }
2242 }
2243
2244 void
2245 bwi_rf_clear_state(struct bwi_rf *rf)
2246 {
2247         int i;
2248
2249         rf->rf_flags &= ~BWI_RF_CLEAR_FLAGS;
2250         bzero(rf->rf_lo, sizeof(rf->rf_lo));
2251         bzero(rf->rf_lo_used, sizeof(rf->rf_lo_used));
2252
2253         rf->rf_nrssi_slope = 0;
2254         rf->rf_nrssi[0] = BWI_INVALID_NRSSI;
2255         rf->rf_nrssi[1] = BWI_INVALID_NRSSI;
2256
2257         for (i = 0; i < BWI_NRSSI_TBLSZ; ++i)
2258                 rf->rf_nrssi_table[i] = i;
2259
2260         rf->rf_lo_gain = 0;
2261         rf->rf_rx_gain = 0;
2262
2263         bcopy(rf->rf_txpower_map0, rf->rf_txpower_map,
2264               sizeof(rf->rf_txpower_map));
2265         rf->rf_idle_tssi = rf->rf_idle_tssi0;
2266 }
2267
2268 static void
2269 bwi_rf_on_11a(struct bwi_mac *mac)
2270 {
2271         /* TODO:11A */
2272 }
2273
2274 static void
2275 bwi_rf_on_11bg(struct bwi_mac *mac)
2276 {
2277         struct bwi_phy *phy = &mac->mac_phy;
2278
2279         PHY_WRITE(mac, 0x15, 0x8000);
2280         PHY_WRITE(mac, 0x15, 0xcc00);
2281         if (phy->phy_flags & BWI_PHY_F_LINKED)
2282                 PHY_WRITE(mac, 0x15, 0xc0);
2283         else
2284                 PHY_WRITE(mac, 0x15, 0);
2285
2286         bwi_rf_set_chan(mac, 6 /* XXX */, 1);
2287 }
2288
2289 void
2290 bwi_rf_set_ant_mode(struct bwi_mac *mac, int ant_mode)
2291 {
2292         struct bwi_softc *sc = mac->mac_sc;
2293         struct bwi_phy *phy = &mac->mac_phy;
2294         uint16_t val;
2295
2296         KASSERT(ant_mode == BWI_ANT_MODE_0 ||
2297                 ant_mode == BWI_ANT_MODE_1 ||
2298                 ant_mode == BWI_ANT_MODE_AUTO, ("ant_mode %d", ant_mode));
2299
2300         HFLAGS_CLRBITS(mac, BWI_HFLAG_AUTO_ANTDIV);
2301
2302         if (phy->phy_mode == IEEE80211_MODE_11B) {
2303                 /* NOTE: v4/v3 conflicts, take v3 */
2304                 if (mac->mac_rev == 2)
2305                         val = BWI_ANT_MODE_AUTO;
2306                 else
2307                         val = ant_mode;
2308                 val <<= 7;
2309                 PHY_FILT_SETBITS(mac, 0x3e2, 0xfe7f, val);
2310         } else {        /* 11a/g */
2311                 /* XXX reg/value naming */
2312                 val = ant_mode << 7;
2313                 PHY_FILT_SETBITS(mac, 0x401, 0x7e7f, val);
2314
2315                 if (ant_mode == BWI_ANT_MODE_AUTO)
2316                         PHY_CLRBITS(mac, 0x42b, 0x100);
2317
2318                 if (phy->phy_mode == IEEE80211_MODE_11A) {
2319                         /* TODO:11A */
2320                 } else {        /* 11g */
2321                         if (ant_mode == BWI_ANT_MODE_AUTO)
2322                                 PHY_SETBITS(mac, 0x48c, 0x2000);
2323                         else
2324                                 PHY_CLRBITS(mac, 0x48c, 0x2000);
2325
2326                         if (phy->phy_rev >= 2) {
2327                                 PHY_SETBITS(mac, 0x461, 0x10);
2328                                 PHY_FILT_SETBITS(mac, 0x4ad, 0xff00, 0x15);
2329                                 if (phy->phy_rev == 2) {
2330                                         PHY_WRITE(mac, 0x427, 0x8);
2331                                 } else {
2332                                         PHY_FILT_SETBITS(mac, 0x427,
2333                                                          0xff00, 0x8);
2334                                 }
2335
2336                                 if (phy->phy_rev >= 6)
2337                                         PHY_WRITE(mac, 0x49b, 0xdc);
2338                         }
2339                 }
2340         }
2341
2342         /* XXX v4 set AUTO_ANTDIV unconditionally */
2343         if (ant_mode == BWI_ANT_MODE_AUTO)
2344                 HFLAGS_SETBITS(mac, BWI_HFLAG_AUTO_ANTDIV);
2345
2346         val = ant_mode << 8;
2347         MOBJ_FILT_SETBITS_2(mac, BWI_COMM_MOBJ, BWI_COMM_MOBJ_TX_BEACON,
2348                             0xfc3f, val);
2349         MOBJ_FILT_SETBITS_2(mac, BWI_COMM_MOBJ, BWI_COMM_MOBJ_TX_ACK,
2350                             0xfc3f, val);
2351         MOBJ_FILT_SETBITS_2(mac, BWI_COMM_MOBJ, BWI_COMM_MOBJ_TX_PROBE_RESP,
2352                             0xfc3f, val);
2353
2354         /* XXX what's these */
2355         if (phy->phy_mode == IEEE80211_MODE_11B)
2356                 CSR_SETBITS_2(sc, 0x5e, 0x4);
2357
2358         CSR_WRITE_4(sc, 0x100, 0x1000000);
2359         if (mac->mac_rev < 5)
2360                 CSR_WRITE_4(sc, 0x10c, 0x1000000);
2361
2362         mac->mac_rf.rf_ant_mode = ant_mode;
2363 }
2364
2365 int
2366 bwi_rf_get_latest_tssi(struct bwi_mac *mac, int8_t tssi[], uint16_t ofs)
2367 {
2368         int i;
2369
2370         for (i = 0; i < 4; ) {
2371                 uint16_t val;
2372
2373                 val = MOBJ_READ_2(mac, BWI_COMM_MOBJ, ofs + i);
2374                 tssi[i++] = (int8_t)__SHIFTOUT(val, BWI_LO_TSSI_MASK);
2375                 tssi[i++] = (int8_t)__SHIFTOUT(val, BWI_HI_TSSI_MASK);
2376         }
2377
2378         for (i = 0; i < 4; ++i) {
2379                 if (tssi[i] == BWI_INVALID_TSSI)
2380                         return EINVAL;
2381         }
2382         return 0;
2383 }
2384
2385 int
2386 bwi_rf_tssi2dbm(struct bwi_mac *mac, int8_t tssi, int8_t *txpwr)
2387 {
2388         struct bwi_rf *rf = &mac->mac_rf;
2389         int pwr_idx;
2390
2391         pwr_idx = rf->rf_idle_tssi + (int)tssi - rf->rf_base_tssi;
2392 #if 0
2393         if (pwr_idx < 0 || pwr_idx >= BWI_TSSI_MAX)
2394                 return EINVAL;
2395 #else
2396         if (pwr_idx < 0)
2397                 pwr_idx = 0;
2398         else if (pwr_idx >= BWI_TSSI_MAX)
2399                 pwr_idx = BWI_TSSI_MAX - 1;
2400 #endif
2401
2402         *txpwr = rf->rf_txpower_map[pwr_idx];
2403         return 0;
2404 }
2405
2406 static int
2407 bwi_rf_calc_rssi_bcm2050(struct bwi_mac *mac, const struct bwi_rxbuf_hdr *hdr)
2408 {
2409         uint16_t flags1, flags3;
2410         int rssi, lna_gain;
2411
2412         rssi = hdr->rxh_rssi;
2413         flags1 = le16toh(hdr->rxh_flags1);
2414         flags3 = le16toh(hdr->rxh_flags3);
2415
2416         if (flags1 & BWI_RXH_F1_OFDM) {
2417                 if (rssi > 127)
2418                         rssi -= 256;
2419                 if (flags3 & BWI_RXH_F3_BCM2050_RSSI)
2420                         rssi += 17;
2421                 else
2422                         rssi -= 4;
2423                 return rssi;
2424         }
2425
2426         if (mac->mac_sc->sc_card_flags & BWI_CARD_F_SW_NRSSI) {
2427                 struct bwi_rf *rf = &mac->mac_rf;
2428
2429                 if (rssi >= BWI_NRSSI_TBLSZ)
2430                         rssi = BWI_NRSSI_TBLSZ - 1;
2431
2432                 rssi = ((31 - (int)rf->rf_nrssi_table[rssi]) * -131) / 128;
2433                 rssi -= 67;
2434         } else {
2435                 rssi = ((31 - rssi) * -149) / 128;
2436                 rssi -= 68;
2437         }
2438
2439         if (mac->mac_phy.phy_mode != IEEE80211_MODE_11G)
2440                 return rssi;
2441
2442         if (flags3 & BWI_RXH_F3_BCM2050_RSSI)
2443                 rssi += 20;
2444
2445         lna_gain = __SHIFTOUT(le16toh(hdr->rxh_phyinfo),
2446                               BWI_RXH_PHYINFO_LNAGAIN);
2447         DPRINTF(mac->mac_sc, BWI_DBG_RF | BWI_DBG_RX,
2448                 "lna_gain %d, phyinfo 0x%04x\n",
2449                 lna_gain, le16toh(hdr->rxh_phyinfo));
2450         switch (lna_gain) {
2451         case 0:
2452                 rssi += 27;
2453                 break;
2454         case 1:
2455                 rssi += 6;
2456                 break;
2457         case 2:
2458                 rssi += 12;
2459                 break;
2460         case 3:
2461                 /*
2462                  * XXX
2463                  * According to v3 spec, we should do _nothing_ here,
2464                  * but it seems that the result RSSI will be too low
2465                  * (relative to what ath(4) says).  Raise it a little
2466                  * bit.
2467                  */
2468                 rssi += 5;
2469                 break;
2470         default:
2471                 panic("impossible lna gain %d", lna_gain);
2472         }
2473         return rssi;
2474 }
2475
2476 static int
2477 bwi_rf_calc_rssi_bcm2053(struct bwi_mac *mac, const struct bwi_rxbuf_hdr *hdr)
2478 {
2479         uint16_t flags1;
2480         int rssi;
2481
2482         rssi = (((int)hdr->rxh_rssi - 11) * 103) / 64;
2483
2484         flags1 = le16toh(hdr->rxh_flags1);
2485         if (flags1 & BWI_RXH_F1_BCM2053_RSSI)
2486                 rssi -= 109;
2487         else
2488                 rssi -= 83;
2489         return rssi;
2490 }
2491
2492 static int
2493 bwi_rf_calc_rssi_bcm2060(struct bwi_mac *mac, const struct bwi_rxbuf_hdr *hdr)
2494 {
2495         int rssi;
2496
2497         rssi = hdr->rxh_rssi;
2498         if (rssi > 127)
2499                 rssi -= 256;
2500         return rssi;
2501 }
2502
2503 static int
2504 bwi_rf_calc_noise_bcm2050(struct bwi_mac *mac)
2505 {
2506         uint16_t val;
2507         int noise;
2508
2509         val = MOBJ_READ_2(mac, BWI_COMM_MOBJ, BWI_COMM_MOBJ_RF_NOISE);
2510         noise = (int)val;       /* XXX check bounds? */
2511
2512         if (mac->mac_sc->sc_card_flags & BWI_CARD_F_SW_NRSSI) {
2513                 struct bwi_rf *rf = &mac->mac_rf;
2514
2515                 if (noise >= BWI_NRSSI_TBLSZ)
2516                         noise = BWI_NRSSI_TBLSZ - 1;
2517
2518                 noise = ((31 - (int)rf->rf_nrssi_table[noise]) * -131) / 128;
2519                 noise -= 67;
2520         } else {
2521                 noise = ((31 - noise) * -149) / 128;
2522                 noise -= 68;
2523         }
2524         return noise;
2525 }
2526
2527 static int
2528 bwi_rf_calc_noise_bcm2053(struct bwi_mac *mac)
2529 {
2530         uint16_t val;
2531         int noise;
2532
2533         val = MOBJ_READ_2(mac, BWI_COMM_MOBJ, BWI_COMM_MOBJ_RF_NOISE);
2534         noise = (int)val;       /* XXX check bounds? */
2535
2536         noise = ((noise - 11) * 103) / 64;
2537         noise -= 109;
2538         return noise;
2539 }
2540
2541 static int
2542 bwi_rf_calc_noise_bcm2060(struct bwi_mac *mac)
2543 {
2544         /* XXX Dont know how to calc */
2545         return (BWI_NOISE_FLOOR);
2546 }
2547
2548 static uint16_t
2549 bwi_rf_lo_measure_11b(struct bwi_mac *mac)
2550 {
2551         uint16_t val;
2552         int i;
2553
2554         val = 0;
2555         for (i = 0; i < 10; ++i) {
2556                 PHY_WRITE(mac, 0x15, 0xafa0);
2557                 DELAY(1);
2558                 PHY_WRITE(mac, 0x15, 0xefa0);
2559                 DELAY(10);
2560                 PHY_WRITE(mac, 0x15, 0xffa0);
2561                 DELAY(40);
2562
2563                 val += PHY_READ(mac, 0x2c);
2564         }
2565         return val;
2566 }
2567
2568 static void
2569 bwi_rf_lo_update_11b(struct bwi_mac *mac)
2570 {
2571         struct bwi_softc *sc = mac->mac_sc;
2572         struct bwi_rf *rf = &mac->mac_rf;
2573         struct rf_saveregs regs;
2574         uint16_t rf_val, phy_val, min_val, val;
2575         uint16_t rf52, bphy_ctrl;
2576         int i;
2577
2578         DPRINTF(sc, BWI_DBG_RF | BWI_DBG_INIT, "%s enter\n", __func__);
2579
2580         bzero(&regs, sizeof(regs));
2581         bphy_ctrl = 0;
2582
2583         /*
2584          * Save RF/PHY registers for later restoration
2585          */
2586         SAVE_PHY_REG(mac, &regs, 15);
2587         rf52 = RF_READ(mac, 0x52) & 0xfff0;
2588         if (rf->rf_type == BWI_RF_T_BCM2050) {
2589                 SAVE_PHY_REG(mac, &regs, 0a);
2590                 SAVE_PHY_REG(mac, &regs, 2a);
2591                 SAVE_PHY_REG(mac, &regs, 35);
2592                 SAVE_PHY_REG(mac, &regs, 03);
2593                 SAVE_PHY_REG(mac, &regs, 01);
2594                 SAVE_PHY_REG(mac, &regs, 30);
2595
2596                 SAVE_RF_REG(mac, &regs, 43);
2597                 SAVE_RF_REG(mac, &regs, 7a);
2598
2599                 bphy_ctrl = CSR_READ_2(sc, BWI_BPHY_CTRL);
2600
2601                 SAVE_RF_REG(mac, &regs, 52);
2602                 regs.rf_52 &= 0xf0;
2603
2604                 PHY_WRITE(mac, 0x30, 0xff);
2605                 CSR_WRITE_2(sc, BWI_PHY_CTRL, 0x3f3f);
2606                 PHY_WRITE(mac, 0x35, regs.phy_35 & 0xff7f);
2607                 RF_WRITE(mac, 0x7a, regs.rf_7a & 0xfff0);
2608         }
2609
2610         PHY_WRITE(mac, 0x15, 0xb000);
2611
2612         if (rf->rf_type == BWI_RF_T_BCM2050) {
2613                 PHY_WRITE(mac, 0x2b, 0x203);
2614                 PHY_WRITE(mac, 0x2a, 0x8a3);
2615         } else {
2616                 PHY_WRITE(mac, 0x2b, 0x1402);
2617         }
2618
2619         /*
2620          * Setup RF signal
2621          */
2622         rf_val = 0;
2623         min_val = UINT16_MAX;
2624
2625         for (i = 0; i < 4; ++i) {
2626                 RF_WRITE(mac, 0x52, rf52 | i);
2627                 bwi_rf_lo_measure_11b(mac);     /* Ignore return value */
2628         }
2629         for (i = 0; i < 10; ++i) {
2630                 RF_WRITE(mac, 0x52, rf52 | i);
2631
2632                 val = bwi_rf_lo_measure_11b(mac) / 10;
2633                 if (val < min_val) {
2634                         min_val = val;
2635                         rf_val = i;
2636                 }
2637         }
2638         RF_WRITE(mac, 0x52, rf52 | rf_val);
2639
2640         /*
2641          * Setup PHY signal
2642          */
2643         phy_val = 0;
2644         min_val = UINT16_MAX;
2645
2646         for (i = -4; i < 5; i += 2) {
2647                 int j;
2648
2649                 for (j = -4; j < 5; j += 2) {
2650                         uint16_t phy2f;
2651
2652                         phy2f = (0x100 * i) + j;
2653                         if (j < 0)
2654                                 phy2f += 0x100;
2655                         PHY_WRITE(mac, 0x2f, phy2f);
2656
2657                         val = bwi_rf_lo_measure_11b(mac) / 10;
2658                         if (val < min_val) {
2659                                 min_val = val;
2660                                 phy_val = phy2f;
2661                         }
2662                 }
2663         }
2664         PHY_WRITE(mac, 0x2f, phy_val + 0x101);
2665
2666         /*
2667          * Restore saved RF/PHY registers
2668          */
2669         if (rf->rf_type == BWI_RF_T_BCM2050) {
2670                 RESTORE_PHY_REG(mac, &regs, 0a);
2671                 RESTORE_PHY_REG(mac, &regs, 2a);
2672                 RESTORE_PHY_REG(mac, &regs, 35);
2673                 RESTORE_PHY_REG(mac, &regs, 03);
2674                 RESTORE_PHY_REG(mac, &regs, 01);
2675                 RESTORE_PHY_REG(mac, &regs, 30);
2676
2677                 RESTORE_RF_REG(mac, &regs, 43);
2678                 RESTORE_RF_REG(mac, &regs, 7a);
2679
2680                 RF_FILT_SETBITS(mac, 0x52, 0xf, regs.rf_52);
2681
2682                 CSR_WRITE_2(sc, BWI_BPHY_CTRL, bphy_ctrl);
2683         }
2684         RESTORE_PHY_REG(mac, &regs, 15);
2685
2686         bwi_rf_work_around(mac, rf->rf_curchan);
2687 }