drivers/net/wireless/broadcom/b43/lo.c

   1 // SPDX-License-Identifier: GPL-2.0-or-later
   2 /*
   3
   4   Broadcom B43 wireless driver
   5
   6   G PHY LO (LocalOscillator) Measuring and Control routines
   7
   8   Copyright (c) 2005 Martin Langer <martin-langer@gmx.de>,
   9   Copyright (c) 2005, 2006 Stefano Brivio <stefano.brivio@polimi.it>
  10   Copyright (c) 2005-2007 Michael Buesch <m@bues.ch>
  11   Copyright (c) 2005, 2006 Danny van Dyk <kugelfang@gentoo.org>
  12   Copyright (c) 2005, 2006 Andreas Jaggi <andreas.jaggi@waterwave.ch>
  13
  14
  15 */
  16
  17 #include "b43.h"
  18 #include "lo.h"
  19 #include "phy_g.h"
  20 #include "main.h"
  21
  22 #include <linux/delay.h>
  23 #include <linux/sched.h>
  24 #include <linux/slab.h>
  25
  26
  27 static struct b43_lo_calib *b43_find_lo_calib(struct b43_txpower_lo_control *lo,
  28                                               const struct b43_bbatt *bbatt,
  29                                                const struct b43_rfatt *rfatt)
  30 {
  31         struct b43_lo_calib *c;
  32
  33         list_for_each_entry(c, &lo->calib_list, list) {
  34                 if (!b43_compare_bbatt(&c->bbatt, bbatt))
  35                         continue;
  36                 if (!b43_compare_rfatt(&c->rfatt, rfatt))
  37                         continue;
  38                 return c;
  39         }
  40
  41         return NULL;
  42 }
  43
  44 /* Write the LocalOscillator Control (adjust) value-pair. */
  45 static void b43_lo_write(struct b43_wldev *dev, struct b43_loctl *control)
  46 {
  47         struct b43_phy *phy = &dev->phy;
  48         u16 value;
  49
  50         if (B43_DEBUG) {
  51                 if (unlikely(abs(control->i) > 16 || abs(control->q) > 16)) {
  52                         b43dbg(dev->wl, "Invalid LO control pair "
  53                                "(I: %d, Q: %d)\n", control->i, control->q);
  54                         dump_stack();
  55                         return;
  56                 }
  57         }
  58         B43_WARN_ON(phy->type != B43_PHYTYPE_G);
  59
  60         value = (u8) (control->q);
  61         value |= ((u8) (control->i)) << 8;
  62         b43_phy_write(dev, B43_PHY_LO_CTL, value);
  63 }
  64
  65 static u16 lo_measure_feedthrough(struct b43_wldev *dev,
  66                                   u16 lna, u16 pga, u16 trsw_rx)
  67 {
  68         struct b43_phy *phy = &dev->phy;
  69         u16 rfover;
  70         u16 feedthrough;
  71
  72         if (phy->gmode) {
  73                 lna <<= B43_PHY_RFOVERVAL_LNA_SHIFT;
  74                 pga <<= B43_PHY_RFOVERVAL_PGA_SHIFT;
  75
  76                 B43_WARN_ON(lna & ~B43_PHY_RFOVERVAL_LNA);
  77                 B43_WARN_ON(pga & ~B43_PHY_RFOVERVAL_PGA);
  78 /*FIXME This assertion fails            B43_WARN_ON(trsw_rx & ~(B43_PHY_RFOVERVAL_TRSWRX |
  79                                     B43_PHY_RFOVERVAL_BW));
  80 */
  81                 trsw_rx &= (B43_PHY_RFOVERVAL_TRSWRX | B43_PHY_RFOVERVAL_BW);
  82
  83                 /* Construct the RF Override Value */
  84                 rfover = B43_PHY_RFOVERVAL_UNK;
  85                 rfover |= pga;
  86                 rfover |= lna;
  87                 rfover |= trsw_rx;
  88                 if ((dev->dev->bus_sprom->boardflags_lo & B43_BFL_EXTLNA)
  89                     && phy->rev > 6)
  90                         rfover |= B43_PHY_RFOVERVAL_EXTLNA;
  91
  92                 b43_phy_write(dev, B43_PHY_PGACTL, 0xE300);
  93                 b43_phy_write(dev, B43_PHY_RFOVERVAL, rfover);
  94                 udelay(10);
  95                 rfover |= B43_PHY_RFOVERVAL_BW_LBW;
  96                 b43_phy_write(dev, B43_PHY_RFOVERVAL, rfover);
  97                 udelay(10);
  98                 rfover |= B43_PHY_RFOVERVAL_BW_LPF;
  99                 b43_phy_write(dev, B43_PHY_RFOVERVAL, rfover);
 100                 udelay(10);
 101                 b43_phy_write(dev, B43_PHY_PGACTL, 0xF300);
 102         } else {
 103                 pga |= B43_PHY_PGACTL_UNKNOWN;
 104                 b43_phy_write(dev, B43_PHY_PGACTL, pga);
 105                 udelay(10);
 106                 pga |= B43_PHY_PGACTL_LOWBANDW;
 107                 b43_phy_write(dev, B43_PHY_PGACTL, pga);
 108                 udelay(10);
 109                 pga |= B43_PHY_PGACTL_LPF;
 110                 b43_phy_write(dev, B43_PHY_PGACTL, pga);
 111         }
 112         udelay(21);
 113         feedthrough = b43_phy_read(dev, B43_PHY_LO_LEAKAGE);
 114
 115         /* This is a good place to check if we need to relax a bit,
 116          * as this is the main function called regularly
 117          * in the LO calibration. */
 118         cond_resched();
 119
 120         return feedthrough;
 121 }
 122
 123 /* TXCTL Register and Value Table.
 124  * Returns the "TXCTL Register".
 125  * "value" is the "TXCTL Value".
 126  * "pad_mix_gain" is the PAD Mixer Gain.
 127  */
 128 static u16 lo_txctl_register_table(struct b43_wldev *dev,
 129                                    u16 *value, u16 *pad_mix_gain)
 130 {
 131         struct b43_phy *phy = &dev->phy;
 132         u16 reg, v, padmix;
 133
 134         if (phy->type == B43_PHYTYPE_B) {
 135                 v = 0x30;
 136                 if (phy->radio_rev <= 5) {
 137                         reg = 0x43;
 138                         padmix = 0;
 139                 } else {
 140                         reg = 0x52;
 141                         padmix = 5;
 142                 }
 143         } else {
 144                 if (phy->rev >= 2 && phy->radio_rev == 8) {
 145                         reg = 0x43;
 146                         v = 0x10;
 147                         padmix = 2;
 148                 } else {
 149                         reg = 0x52;
 150                         v = 0x30;
 151                         padmix = 5;
 152                 }
 153         }
 154         if (value)
 155                 *value = v;
 156         if (pad_mix_gain)
 157                 *pad_mix_gain = padmix;
 158
 159         return reg;
 160 }
 161
 162 static void lo_measure_txctl_values(struct b43_wldev *dev)
 163 {
 164         struct b43_phy *phy = &dev->phy;
 165         struct b43_phy_g *gphy = phy->g;
 166         struct b43_txpower_lo_control *lo = gphy->lo_control;
 167         u16 reg, mask;
 168         u16 trsw_rx, pga;
 169         u16 radio_pctl_reg;
 170
 171         static const u8 tx_bias_values[] = {
 172                 0x09, 0x08, 0x0A, 0x01, 0x00,
 173                 0x02, 0x05, 0x04, 0x06,
 174         };
 175         static const u8 tx_magn_values[] = {
 176                 0x70, 0x40,
 177         };
 178
 179         if (!has_loopback_gain(phy)) {
 180                 radio_pctl_reg = 6;
 181                 trsw_rx = 2;
 182                 pga = 0;
 183         } else {
 184                 int lb_gain;    /* Loopback gain (in dB) */
 185
 186                 trsw_rx = 0;
 187                 lb_gain = gphy->max_lb_gain / 2;
 188                 if (lb_gain > 10) {
 189                         radio_pctl_reg = 0;
 190                         pga = abs(10 - lb_gain) / 6;
 191                         pga = clamp_val(pga, 0, 15);
 192                 } else {
 193                         int cmp_val;
 194                         int tmp;
 195
 196                         pga = 0;
 197                         cmp_val = 0x24;
 198                         if ((phy->rev >= 2) &&
 199                             (phy->radio_ver == 0x2050) && (phy->radio_rev == 8))
 200                                 cmp_val = 0x3C;
 201                         tmp = lb_gain;
 202                         if ((10 - lb_gain) < cmp_val)
 203                                 tmp = (10 - lb_gain);
 204                         if (tmp < 0)
 205                                 tmp += 6;
 206                         else
 207                                 tmp += 3;
 208                         cmp_val /= 4;
 209                         tmp /= 4;
 210                         if (tmp >= cmp_val)
 211                                 radio_pctl_reg = cmp_val;
 212                         else
 213                                 radio_pctl_reg = tmp;
 214                 }
 215         }
 216         b43_radio_maskset(dev, 0x43, 0xFFF0, radio_pctl_reg);
 217         b43_gphy_set_baseband_attenuation(dev, 2);
 218
 219         reg = lo_txctl_register_table(dev, &mask, NULL);
 220         mask = ~mask;
 221         b43_radio_mask(dev, reg, mask);
 222
 223         if (has_tx_magnification(phy)) {
 224                 int i, j;
 225                 int feedthrough;
 226                 int min_feedth = 0xFFFF;
 227                 u8 tx_magn, tx_bias;
 228
 229                 for (i = 0; i < ARRAY_SIZE(tx_magn_values); i++) {
 230                         tx_magn = tx_magn_values[i];
 231                         b43_radio_maskset(dev, 0x52, 0xFF0F, tx_magn);
 232                         for (j = 0; j < ARRAY_SIZE(tx_bias_values); j++) {
 233                                 tx_bias = tx_bias_values[j];
 234                                 b43_radio_maskset(dev, 0x52, 0xFFF0, tx_bias);
 235                                 feedthrough =
 236                                     lo_measure_feedthrough(dev, 0, pga,
 237                                                            trsw_rx);
 238                                 if (feedthrough < min_feedth) {
 239                                         lo->tx_bias = tx_bias;
 240                                         lo->tx_magn = tx_magn;
 241                                         min_feedth = feedthrough;
 242                                 }
 243                                 if (lo->tx_bias == 0)
 244                                         break;
 245                         }
 246                         b43_radio_write16(dev, 0x52,
 247                                           (b43_radio_read16(dev, 0x52)
 248                                            & 0xFF00) | lo->tx_bias | lo->
 249                                           tx_magn);
 250                 }
 251         } else {
 252                 lo->tx_magn = 0;
 253                 lo->tx_bias = 0;
 254                 b43_radio_mask(dev, 0x52, 0xFFF0);      /* TX bias == 0 */
 255         }
 256         lo->txctl_measured_time = jiffies;
 257 }
 258
 259 static void lo_read_power_vector(struct b43_wldev *dev)
 260 {
 261         struct b43_phy *phy = &dev->phy;
 262         struct b43_phy_g *gphy = phy->g;
 263         struct b43_txpower_lo_control *lo = gphy->lo_control;
 264         int i;
 265         u64 tmp;
 266         u64 power_vector = 0;
 267
 268         for (i = 0; i < 8; i += 2) {
 269                 tmp = b43_shm_read16(dev, B43_SHM_SHARED, 0x310 + i);
 270                 power_vector |= (tmp << (i * 8));
 271                 /* Clear the vector on the device. */
 272                 b43_shm_write16(dev, B43_SHM_SHARED, 0x310 + i, 0);
 273         }
 274         if (power_vector)
 275                 lo->power_vector = power_vector;
 276         lo->pwr_vec_read_time = jiffies;
 277 }
 278
 279 /* 802.11/LO/GPHY/MeasuringGains */
 280 static void lo_measure_gain_values(struct b43_wldev *dev,
 281                                    s16 max_rx_gain, int use_trsw_rx)
 282 {
 283         struct b43_phy *phy = &dev->phy;
 284         struct b43_phy_g *gphy = phy->g;
 285         u16 tmp;
 286
 287         if (max_rx_gain < 0)
 288                 max_rx_gain = 0;
 289
 290         if (has_loopback_gain(phy)) {
 291                 int trsw_rx_gain;
 292
 293                 if (use_trsw_rx) {
 294                         trsw_rx_gain = gphy->trsw_rx_gain / 2;
 295                         if (max_rx_gain >= trsw_rx_gain) {
 296                                 trsw_rx_gain = max_rx_gain - trsw_rx_gain;
 297                         }
 298                 } else
 299                         trsw_rx_gain = max_rx_gain;
 300                 if (trsw_rx_gain < 9) {
 301                         gphy->lna_lod_gain = 0;
 302                 } else {
 303                         gphy->lna_lod_gain = 1;
 304                         trsw_rx_gain -= 8;
 305                 }
 306                 trsw_rx_gain = clamp_val(trsw_rx_gain, 0, 0x2D);
 307                 gphy->pga_gain = trsw_rx_gain / 3;
 308                 if (gphy->pga_gain >= 5) {
 309                         gphy->pga_gain -= 5;
 310                         gphy->lna_gain = 2;
 311                 } else
 312                         gphy->lna_gain = 0;
 313         } else {
 314                 gphy->lna_gain = 0;
 315                 gphy->trsw_rx_gain = 0x20;
 316                 if (max_rx_gain >= 0x14) {
 317                         gphy->lna_lod_gain = 1;
 318                         gphy->pga_gain = 2;
 319                 } else if (max_rx_gain >= 0x12) {
 320                         gphy->lna_lod_gain = 1;
 321                         gphy->pga_gain = 1;
 322                 } else if (max_rx_gain >= 0xF) {
 323                         gphy->lna_lod_gain = 1;
 324                         gphy->pga_gain = 0;
 325                 } else {
 326                         gphy->lna_lod_gain = 0;
 327                         gphy->pga_gain = 0;
 328                 }
 329         }
 330
 331         tmp = b43_radio_read16(dev, 0x7A);
 332         if (gphy->lna_lod_gain == 0)
 333                 tmp &= ~0x0008;
 334         else
 335                 tmp |= 0x0008;
 336         b43_radio_write16(dev, 0x7A, tmp);
 337 }
 338
 339 struct lo_g_saved_values {
 340         u8 old_channel;
 341
 342         /* Core registers */
 343         u16 reg_3F4;
 344         u16 reg_3E2;
 345
 346         /* PHY registers */
 347         u16 phy_lo_mask;
 348         u16 phy_extg_01;
 349         u16 phy_dacctl_hwpctl;
 350         u16 phy_dacctl;
 351         u16 phy_cck_14;
 352         u16 phy_hpwr_tssictl;
 353         u16 phy_analogover;
 354         u16 phy_analogoverval;
 355         u16 phy_rfover;
 356         u16 phy_rfoverval;
 357         u16 phy_classctl;
 358         u16 phy_cck_3E;
 359         u16 phy_crs0;
 360         u16 phy_pgactl;
 361         u16 phy_cck_2A;
 362         u16 phy_syncctl;
 363         u16 phy_cck_30;
 364         u16 phy_cck_06;
 365
 366         /* Radio registers */
 367         u16 radio_43;
 368         u16 radio_7A;
 369         u16 radio_52;
 370 };
 371
 372 static void lo_measure_setup(struct b43_wldev *dev,
 373                              struct lo_g_saved_values *sav)
 374 {
 375         struct ssb_sprom *sprom = dev->dev->bus_sprom;
 376         struct b43_phy *phy = &dev->phy;
 377         struct b43_phy_g *gphy = phy->g;
 378         struct b43_txpower_lo_control *lo = gphy->lo_control;
 379         u16 tmp;
 380
 381         if (b43_has_hardware_pctl(dev)) {
 382                 sav->phy_lo_mask = b43_phy_read(dev, B43_PHY_LO_MASK);
 383                 sav->phy_extg_01 = b43_phy_read(dev, B43_PHY_EXTG(0x01));
 384                 sav->phy_dacctl_hwpctl = b43_phy_read(dev, B43_PHY_DACCTL);
 385                 sav->phy_cck_14 = b43_phy_read(dev, B43_PHY_CCK(0x14));
 386                 sav->phy_hpwr_tssictl = b43_phy_read(dev, B43_PHY_HPWR_TSSICTL);
 387
 388                 b43_phy_set(dev, B43_PHY_HPWR_TSSICTL, 0x100);
 389                 b43_phy_set(dev, B43_PHY_EXTG(0x01), 0x40);
 390                 b43_phy_set(dev, B43_PHY_DACCTL, 0x40);
 391                 b43_phy_set(dev, B43_PHY_CCK(0x14), 0x200);
 392         }
 393         if (phy->type == B43_PHYTYPE_B &&
 394             phy->radio_ver == 0x2050 && phy->radio_rev < 6) {
 395                 b43_phy_write(dev, B43_PHY_CCK(0x16), 0x410);
 396                 b43_phy_write(dev, B43_PHY_CCK(0x17), 0x820);
 397         }
 398         if (phy->rev >= 2) {
 399                 sav->phy_analogover = b43_phy_read(dev, B43_PHY_ANALOGOVER);
 400                 sav->phy_analogoverval =
 401                     b43_phy_read(dev, B43_PHY_ANALOGOVERVAL);
 402                 sav->phy_rfover = b43_phy_read(dev, B43_PHY_RFOVER);
 403                 sav->phy_rfoverval = b43_phy_read(dev, B43_PHY_RFOVERVAL);
 404                 sav->phy_classctl = b43_phy_read(dev, B43_PHY_CLASSCTL);
 405                 sav->phy_cck_3E = b43_phy_read(dev, B43_PHY_CCK(0x3E));
 406                 sav->phy_crs0 = b43_phy_read(dev, B43_PHY_CRS0);
 407
 408                 b43_phy_mask(dev, B43_PHY_CLASSCTL, 0xFFFC);
 409                 b43_phy_mask(dev, B43_PHY_CRS0, 0x7FFF);
 410                 b43_phy_set(dev, B43_PHY_ANALOGOVER, 0x0003);
 411                 b43_phy_mask(dev, B43_PHY_ANALOGOVERVAL, 0xFFFC);
 412                 if (phy->type == B43_PHYTYPE_G) {
 413                         if ((phy->rev >= 7) &&
 414                             (sprom->boardflags_lo & B43_BFL_EXTLNA)) {
 415                                 b43_phy_write(dev, B43_PHY_RFOVER, 0x933);
 416                         } else {
 417                                 b43_phy_write(dev, B43_PHY_RFOVER, 0x133);
 418                         }
 419                 } else {
 420                         b43_phy_write(dev, B43_PHY_RFOVER, 0);
 421                 }
 422                 b43_phy_write(dev, B43_PHY_CCK(0x3E), 0);
 423         }
 424         sav->reg_3F4 = b43_read16(dev, 0x3F4);
 425         sav->reg_3E2 = b43_read16(dev, 0x3E2);
 426         sav->radio_43 = b43_radio_read16(dev, 0x43);
 427         sav->radio_7A = b43_radio_read16(dev, 0x7A);
 428         sav->phy_pgactl = b43_phy_read(dev, B43_PHY_PGACTL);
 429         sav->phy_cck_2A = b43_phy_read(dev, B43_PHY_CCK(0x2A));
 430         sav->phy_syncctl = b43_phy_read(dev, B43_PHY_SYNCCTL);
 431         sav->phy_dacctl = b43_phy_read(dev, B43_PHY_DACCTL);
 432
 433         if (!has_tx_magnification(phy)) {
 434                 sav->radio_52 = b43_radio_read16(dev, 0x52);
 435                 sav->radio_52 &= 0x00F0;
 436         }
 437         if (phy->type == B43_PHYTYPE_B) {
 438                 sav->phy_cck_30 = b43_phy_read(dev, B43_PHY_CCK(0x30));
 439                 sav->phy_cck_06 = b43_phy_read(dev, B43_PHY_CCK(0x06));
 440                 b43_phy_write(dev, B43_PHY_CCK(0x30), 0x00FF);
 441                 b43_phy_write(dev, B43_PHY_CCK(0x06), 0x3F3F);
 442         } else {
 443                 b43_write16(dev, 0x3E2, b43_read16(dev, 0x3E2)
 444                             | 0x8000);
 445         }
 446         b43_write16(dev, 0x3F4, b43_read16(dev, 0x3F4)
 447                     & 0xF000);
 448
 449         tmp =
 450             (phy->type == B43_PHYTYPE_G) ? B43_PHY_LO_MASK : B43_PHY_CCK(0x2E);
 451         b43_phy_write(dev, tmp, 0x007F);
 452
 453         tmp = sav->phy_syncctl;
 454         b43_phy_write(dev, B43_PHY_SYNCCTL, tmp & 0xFF7F);
 455         tmp = sav->radio_7A;
 456         b43_radio_write16(dev, 0x007A, tmp & 0xFFF0);
 457
 458         b43_phy_write(dev, B43_PHY_CCK(0x2A), 0x8A3);
 459         if (phy->type == B43_PHYTYPE_G ||
 460             (phy->type == B43_PHYTYPE_B &&
 461              phy->radio_ver == 0x2050 && phy->radio_rev >= 6)) {
 462                 b43_phy_write(dev, B43_PHY_CCK(0x2B), 0x1003);
 463         } else
 464                 b43_phy_write(dev, B43_PHY_CCK(0x2B), 0x0802);
 465         if (phy->rev >= 2)
 466                 b43_dummy_transmission(dev, false, true);
 467         b43_gphy_channel_switch(dev, 6, 0);
 468         b43_radio_read16(dev, 0x51);    /* dummy read */
 469         if (phy->type == B43_PHYTYPE_G)
 470                 b43_phy_write(dev, B43_PHY_CCK(0x2F), 0);
 471
 472         /* Re-measure the txctl values, if needed. */
 473         if (time_before(lo->txctl_measured_time,
 474                         jiffies - B43_LO_TXCTL_EXPIRE))
 475                 lo_measure_txctl_values(dev);
 476
 477         if (phy->type == B43_PHYTYPE_G && phy->rev >= 3) {
 478                 b43_phy_write(dev, B43_PHY_LO_MASK, 0xC078);
 479         } else {
 480                 if (phy->type == B43_PHYTYPE_B)
 481                         b43_phy_write(dev, B43_PHY_CCK(0x2E), 0x8078);
 482                 else
 483                         b43_phy_write(dev, B43_PHY_LO_MASK, 0x8078);
 484         }
 485 }
 486
 487 static void lo_measure_restore(struct b43_wldev *dev,
 488                                struct lo_g_saved_values *sav)
 489 {
 490         struct b43_phy *phy = &dev->phy;
 491         struct b43_phy_g *gphy = phy->g;
 492         u16 tmp;
 493
 494         if (phy->rev >= 2) {
 495                 b43_phy_write(dev, B43_PHY_PGACTL, 0xE300);
 496                 tmp = (gphy->pga_gain << 8);
 497                 b43_phy_write(dev, B43_PHY_RFOVERVAL, tmp | 0xA0);
 498                 udelay(5);
 499                 b43_phy_write(dev, B43_PHY_RFOVERVAL, tmp | 0xA2);
 500                 udelay(2);
 501                 b43_phy_write(dev, B43_PHY_RFOVERVAL, tmp | 0xA3);
 502         } else {
 503                 tmp = (gphy->pga_gain | 0xEFA0);
 504                 b43_phy_write(dev, B43_PHY_PGACTL, tmp);
 505         }
 506         if (phy->type == B43_PHYTYPE_G) {
 507                 if (phy->rev >= 3)
 508                         b43_phy_write(dev, B43_PHY_CCK(0x2E), 0xC078);
 509                 else
 510                         b43_phy_write(dev, B43_PHY_CCK(0x2E), 0x8078);
 511                 if (phy->rev >= 2)
 512                         b43_phy_write(dev, B43_PHY_CCK(0x2F), 0x0202);
 513                 else
 514                         b43_phy_write(dev, B43_PHY_CCK(0x2F), 0x0101);
 515         }
 516         b43_write16(dev, 0x3F4, sav->reg_3F4);
 517         b43_phy_write(dev, B43_PHY_PGACTL, sav->phy_pgactl);
 518         b43_phy_write(dev, B43_PHY_CCK(0x2A), sav->phy_cck_2A);
 519         b43_phy_write(dev, B43_PHY_SYNCCTL, sav->phy_syncctl);
 520         b43_phy_write(dev, B43_PHY_DACCTL, sav->phy_dacctl);
 521         b43_radio_write16(dev, 0x43, sav->radio_43);
 522         b43_radio_write16(dev, 0x7A, sav->radio_7A);
 523         if (!has_tx_magnification(phy)) {
 524                 tmp = sav->radio_52;
 525                 b43_radio_maskset(dev, 0x52, 0xFF0F, tmp);
 526         }
 527         b43_write16(dev, 0x3E2, sav->reg_3E2);
 528         if (phy->type == B43_PHYTYPE_B &&
 529             phy->radio_ver == 0x2050 && phy->radio_rev <= 5) {
 530                 b43_phy_write(dev, B43_PHY_CCK(0x30), sav->phy_cck_30);
 531                 b43_phy_write(dev, B43_PHY_CCK(0x06), sav->phy_cck_06);
 532         }
 533         if (phy->rev >= 2) {
 534                 b43_phy_write(dev, B43_PHY_ANALOGOVER, sav->phy_analogover);
 535                 b43_phy_write(dev, B43_PHY_ANALOGOVERVAL,
 536                               sav->phy_analogoverval);
 537                 b43_phy_write(dev, B43_PHY_CLASSCTL, sav->phy_classctl);
 538                 b43_phy_write(dev, B43_PHY_RFOVER, sav->phy_rfover);
 539                 b43_phy_write(dev, B43_PHY_RFOVERVAL, sav->phy_rfoverval);
 540                 b43_phy_write(dev, B43_PHY_CCK(0x3E), sav->phy_cck_3E);
 541                 b43_phy_write(dev, B43_PHY_CRS0, sav->phy_crs0);
 542         }
 543         if (b43_has_hardware_pctl(dev)) {
 544                 tmp = (sav->phy_lo_mask & 0xBFFF);
 545                 b43_phy_write(dev, B43_PHY_LO_MASK, tmp);
 546                 b43_phy_write(dev, B43_PHY_EXTG(0x01), sav->phy_extg_01);
 547                 b43_phy_write(dev, B43_PHY_DACCTL, sav->phy_dacctl_hwpctl);
 548                 b43_phy_write(dev, B43_PHY_CCK(0x14), sav->phy_cck_14);
 549                 b43_phy_write(dev, B43_PHY_HPWR_TSSICTL, sav->phy_hpwr_tssictl);
 550         }
 551         b43_gphy_channel_switch(dev, sav->old_channel, 1);
 552 }
 553
 554 struct b43_lo_g_statemachine {
 555         int current_state;
 556         int nr_measured;
 557         int state_val_multiplier;
 558         u16 lowest_feedth;
 559         struct b43_loctl min_loctl;
 560 };
 561
 562 /* Loop over each possible value in this state. */
 563 static int lo_probe_possible_loctls(struct b43_wldev *dev,
 564                                     struct b43_loctl *probe_loctl,
 565                                     struct b43_lo_g_statemachine *d)
 566 {
 567         struct b43_phy *phy = &dev->phy;
 568         struct b43_phy_g *gphy = phy->g;
 569         struct b43_loctl test_loctl;
 570         struct b43_loctl orig_loctl;
 571         struct b43_loctl prev_loctl = {
 572                 .i = -100,
 573                 .q = -100,
 574         };
 575         int i;
 576         int begin, end;
 577         int found_lower = 0;
 578         u16 feedth;
 579
 580         static const struct b43_loctl modifiers[] = {
 581                 {.i = 1,.q = 1,},
 582                 {.i = 1,.q = 0,},
 583                 {.i = 1,.q = -1,},
 584                 {.i = 0,.q = -1,},
 585                 {.i = -1,.q = -1,},
 586                 {.i = -1,.q = 0,},
 587                 {.i = -1,.q = 1,},
 588                 {.i = 0,.q = 1,},
 589         };
 590
 591         if (d->current_state == 0) {
 592                 begin = 1;
 593                 end = 8;
 594         } else if (d->current_state % 2 == 0) {
 595                 begin = d->current_state - 1;
 596                 end = d->current_state + 1;
 597         } else {
 598                 begin = d->current_state - 2;
 599                 end = d->current_state + 2;
 600         }
 601         if (begin < 1)
 602                 begin += 8;
 603         if (end > 8)
 604                 end -= 8;
 605
 606         memcpy(&orig_loctl, probe_loctl, sizeof(struct b43_loctl));
 607         i = begin;
 608         d->current_state = i;
 609         while (1) {
 610                 B43_WARN_ON(!(i >= 1 && i <= 8));
 611                 memcpy(&test_loctl, &orig_loctl, sizeof(struct b43_loctl));
 612                 test_loctl.i += modifiers[i - 1].i * d->state_val_multiplier;
 613                 test_loctl.q += modifiers[i - 1].q * d->state_val_multiplier;
 614                 if ((test_loctl.i != prev_loctl.i ||
 615                      test_loctl.q != prev_loctl.q) &&
 616                     (abs(test_loctl.i) <= 16 && abs(test_loctl.q) <= 16)) {
 617                         b43_lo_write(dev, &test_loctl);
 618                         feedth = lo_measure_feedthrough(dev, gphy->lna_gain,
 619                                                         gphy->pga_gain,
 620                                                         gphy->trsw_rx_gain);
 621                         if (feedth < d->lowest_feedth) {
 622                                 memcpy(probe_loctl, &test_loctl,
 623                                        sizeof(struct b43_loctl));
 624                                 found_lower = 1;
 625                                 d->lowest_feedth = feedth;
 626                                 if ((d->nr_measured < 2) &&
 627                                     !has_loopback_gain(phy))
 628                                         break;
 629                         }
 630                 }
 631                 memcpy(&prev_loctl, &test_loctl, sizeof(prev_loctl));
 632                 if (i == end)
 633                         break;
 634                 if (i == 8)
 635                         i = 1;
 636                 else
 637                         i++;
 638                 d->current_state = i;
 639         }
 640
 641         return found_lower;
 642 }
 643
 644 static void lo_probe_loctls_statemachine(struct b43_wldev *dev,
 645                                          struct b43_loctl *loctl,
 646                                          int *max_rx_gain)
 647 {
 648         struct b43_phy *phy = &dev->phy;
 649         struct b43_phy_g *gphy = phy->g;
 650         struct b43_lo_g_statemachine d;
 651         u16 feedth;
 652         int found_lower;
 653         struct b43_loctl probe_loctl;
 654         int max_repeat = 1, repeat_cnt = 0;
 655
 656         d.nr_measured = 0;
 657         d.state_val_multiplier = 1;
 658         if (has_loopback_gain(phy))
 659                 d.state_val_multiplier = 3;
 660
 661         memcpy(&d.min_loctl, loctl, sizeof(struct b43_loctl));
 662         if (has_loopback_gain(phy))
 663                 max_repeat = 4;
 664         do {
 665                 b43_lo_write(dev, &d.min_loctl);
 666                 feedth = lo_measure_feedthrough(dev, gphy->lna_gain,
 667                                                 gphy->pga_gain,
 668                                                 gphy->trsw_rx_gain);
 669                 if (feedth < 0x258) {
 670                         if (feedth >= 0x12C)
 671                                 *max_rx_gain += 6;
 672                         else
 673                                 *max_rx_gain += 3;
 674                         feedth = lo_measure_feedthrough(dev, gphy->lna_gain,
 675                                                         gphy->pga_gain,
 676                                                         gphy->trsw_rx_gain);
 677                 }
 678                 d.lowest_feedth = feedth;
 679
 680                 d.current_state = 0;
 681                 do {
 682                         B43_WARN_ON(!
 683                                     (d.current_state >= 0
 684                                      && d.current_state <= 8));
 685                         memcpy(&probe_loctl, &d.min_loctl,
 686                                sizeof(struct b43_loctl));
 687                         found_lower =
 688                             lo_probe_possible_loctls(dev, &probe_loctl, &d);
 689                         if (!found_lower)
 690                                 break;
 691                         if ((probe_loctl.i == d.min_loctl.i) &&
 692                             (probe_loctl.q == d.min_loctl.q))
 693                                 break;
 694                         memcpy(&d.min_loctl, &probe_loctl,
 695                                sizeof(struct b43_loctl));
 696                         d.nr_measured++;
 697                 } while (d.nr_measured < 24);
 698                 memcpy(loctl, &d.min_loctl, sizeof(struct b43_loctl));
 699
 700                 if (has_loopback_gain(phy)) {
 701                         if (d.lowest_feedth > 0x1194)
 702                                 *max_rx_gain -= 6;
 703                         else if (d.lowest_feedth < 0x5DC)
 704                                 *max_rx_gain += 3;
 705                         if (repeat_cnt == 0) {
 706                                 if (d.lowest_feedth <= 0x5DC) {
 707                                         d.state_val_multiplier = 1;
 708                                         repeat_cnt++;
 709                                 } else
 710                                         d.state_val_multiplier = 2;
 711                         } else if (repeat_cnt == 2)
 712                                 d.state_val_multiplier = 1;
 713                 }
 714                 lo_measure_gain_values(dev, *max_rx_gain,
 715                                        has_loopback_gain(phy));
 716         } while (++repeat_cnt < max_repeat);
 717 }
 718
 719 static
 720 struct b43_lo_calib *b43_calibrate_lo_setting(struct b43_wldev *dev,
 721                                               const struct b43_bbatt *bbatt,
 722                                               const struct b43_rfatt *rfatt)
 723 {
 724         struct b43_phy *phy = &dev->phy;
 725         struct b43_phy_g *gphy = phy->g;
 726         struct b43_loctl loctl = {
 727                 .i = 0,
 728                 .q = 0,
 729         };
 730         int max_rx_gain;
 731         struct b43_lo_calib *cal;
 732         struct lo_g_saved_values saved_regs;
 733         /* Values from the "TXCTL Register and Value Table" */
 734         u16 txctl_reg;
 735         u16 txctl_value;
 736         u16 pad_mix_gain;
 737
 738         saved_regs.old_channel = phy->channel;
 739         b43_mac_suspend(dev);
 740         lo_measure_setup(dev, &saved_regs);
 741
 742         txctl_reg = lo_txctl_register_table(dev, &txctl_value, &pad_mix_gain);
 743
 744         b43_radio_maskset(dev, 0x43, 0xFFF0, rfatt->att);
 745         b43_radio_maskset(dev, txctl_reg, ~txctl_value, (rfatt->with_padmix ? txctl_value :0));
 746
 747         max_rx_gain = rfatt->att * 2;
 748         max_rx_gain += bbatt->att / 2;
 749         if (rfatt->with_padmix)
 750                 max_rx_gain -= pad_mix_gain;
 751         if (has_loopback_gain(phy))
 752                 max_rx_gain += gphy->max_lb_gain;
 753         lo_measure_gain_values(dev, max_rx_gain,
 754                                has_loopback_gain(phy));
 755
 756         b43_gphy_set_baseband_attenuation(dev, bbatt->att);
 757         lo_probe_loctls_statemachine(dev, &loctl, &max_rx_gain);
 758
 759         lo_measure_restore(dev, &saved_regs);
 760         b43_mac_enable(dev);
 761
 762         if (b43_debug(dev, B43_DBG_LO)) {
 763                 b43dbg(dev->wl, "LO: Calibrated for BB(%u), RF(%u,%u) "
 764                        "=> I=%d Q=%d\n",
 765                        bbatt->att, rfatt->att, rfatt->with_padmix,
 766                        loctl.i, loctl.q);
 767         }
 768
 769         cal = kmalloc(sizeof(*cal), GFP_KERNEL);
 770         if (!cal) {
 771                 b43warn(dev->wl, "LO calib: out of memory\n");
 772                 return NULL;
 773         }
 774         memcpy(&cal->bbatt, bbatt, sizeof(*bbatt));
 775         memcpy(&cal->rfatt, rfatt, sizeof(*rfatt));
 776         memcpy(&cal->ctl, &loctl, sizeof(loctl));
 777         cal->calib_time = jiffies;
 778         INIT_LIST_HEAD(&cal->list);
 779
 780         return cal;
 781 }
 782
 783 /* Get a calibrated LO setting for the given attenuation values.
 784  * Might return a NULL pointer under OOM! */
 785 static
 786 struct b43_lo_calib *b43_get_calib_lo_settings(struct b43_wldev *dev,
 787                                                const struct b43_bbatt *bbatt,
 788                                                const struct b43_rfatt *rfatt)
 789 {
 790         struct b43_txpower_lo_control *lo = dev->phy.g->lo_control;
 791         struct b43_lo_calib *c;
 792
 793         c = b43_find_lo_calib(lo, bbatt, rfatt);
 794         if (c)
 795                 return c;
 796         /* Not in the list of calibrated LO settings.
 797          * Calibrate it now. */
 798         c = b43_calibrate_lo_setting(dev, bbatt, rfatt);
 799         if (!c)
 800                 return NULL;
 801         list_add(&c->list, &lo->calib_list);
 802
 803         return c;
 804 }
 805
 806 void b43_gphy_dc_lt_init(struct b43_wldev *dev, bool update_all)
 807 {
 808         struct b43_phy *phy = &dev->phy;
 809         struct b43_phy_g *gphy = phy->g;
 810         struct b43_txpower_lo_control *lo = gphy->lo_control;
 811         int i;
 812         int rf_offset, bb_offset;
 813         const struct b43_rfatt *rfatt;
 814         const struct b43_bbatt *bbatt;
 815         u64 power_vector;
 816         bool table_changed = false;
 817
 818         BUILD_BUG_ON(B43_DC_LT_SIZE != 32);
 819         B43_WARN_ON(lo->rfatt_list.len * lo->bbatt_list.len > 64);
 820
 821         power_vector = lo->power_vector;
 822         if (!update_all && !power_vector)
 823                 return; /* Nothing to do. */
 824
 825         /* Suspend the MAC now to avoid continuous suspend/enable
 826          * cycles in the loop. */
 827         b43_mac_suspend(dev);
 828
 829         for (i = 0; i < B43_DC_LT_SIZE * 2; i++) {
 830                 struct b43_lo_calib *cal;
 831                 int idx;
 832                 u16 val;
 833
 834                 if (!update_all && !(power_vector & (((u64)1ULL) << i)))
 835                         continue;
 836                 /* Update the table entry for this power_vector bit.
 837                  * The table rows are RFatt entries and columns are BBatt. */
 838                 bb_offset = i / lo->rfatt_list.len;
 839                 rf_offset = i % lo->rfatt_list.len;
 840                 bbatt = &(lo->bbatt_list.list[bb_offset]);
 841                 rfatt = &(lo->rfatt_list.list[rf_offset]);
 842
 843                 cal = b43_calibrate_lo_setting(dev, bbatt, rfatt);
 844                 if (!cal) {
 845                         b43warn(dev->wl, "LO: Could not "
 846                                 "calibrate DC table entry\n");
 847                         continue;
 848                 }
 849                 /*FIXME: Is Q really in the low nibble? */
 850                 val = (u8)(cal->ctl.q);
 851                 val |= ((u8)(cal->ctl.i)) << 4;
 852                 kfree(cal);
 853
 854                 /* Get the index into the hardware DC LT. */
 855                 idx = i / 2;
 856                 /* Change the table in memory. */
 857                 if (i % 2) {
 858                         /* Change the high byte. */
 859                         lo->dc_lt[idx] = (lo->dc_lt[idx] & 0x00FF)
 860                                          | ((val & 0x00FF) << 8);
 861                 } else {
 862                         /* Change the low byte. */
 863                         lo->dc_lt[idx] = (lo->dc_lt[idx] & 0xFF00)
 864                                          | (val & 0x00FF);
 865                 }
 866                 table_changed = true;
 867         }
 868         if (table_changed) {
 869                 /* The table changed in memory. Update the hardware table. */
 870                 for (i = 0; i < B43_DC_LT_SIZE; i++)
 871                         b43_phy_write(dev, 0x3A0 + i, lo->dc_lt[i]);
 872         }
 873         b43_mac_enable(dev);
 874 }
 875
 876 /* Fixup the RF attenuation value for the case where we are
 877  * using the PAD mixer. */
 878 static inline void b43_lo_fixup_rfatt(struct b43_rfatt *rf)
 879 {
 880         if (!rf->with_padmix)
 881                 return;
 882         if ((rf->att != 1) && (rf->att != 2) && (rf->att != 3))
 883                 rf->att = 4;
 884 }
 885
 886 void b43_lo_g_adjust(struct b43_wldev *dev)
 887 {
 888         struct b43_phy_g *gphy = dev->phy.g;
 889         struct b43_lo_calib *cal;
 890         struct b43_rfatt rf;
 891
 892         memcpy(&rf, &gphy->rfatt, sizeof(rf));
 893         b43_lo_fixup_rfatt(&rf);
 894
 895         cal = b43_get_calib_lo_settings(dev, &gphy->bbatt, &rf);
 896         if (!cal)
 897                 return;
 898         b43_lo_write(dev, &cal->ctl);
 899 }
 900
 901 void b43_lo_g_adjust_to(struct b43_wldev *dev,
 902                         u16 rfatt, u16 bbatt, u16 tx_control)
 903 {
 904         struct b43_rfatt rf;
 905         struct b43_bbatt bb;
 906         struct b43_lo_calib *cal;
 907
 908         memset(&rf, 0, sizeof(rf));
 909         memset(&bb, 0, sizeof(bb));
 910         rf.att = rfatt;
 911         bb.att = bbatt;
 912         b43_lo_fixup_rfatt(&rf);
 913         cal = b43_get_calib_lo_settings(dev, &bb, &rf);
 914         if (!cal)
 915                 return;
 916         b43_lo_write(dev, &cal->ctl);
 917 }
 918
 919 /* Periodic LO maintenance work */
 920 void b43_lo_g_maintenance_work(struct b43_wldev *dev)
 921 {
 922         struct b43_phy *phy = &dev->phy;
 923         struct b43_phy_g *gphy = phy->g;
 924         struct b43_txpower_lo_control *lo = gphy->lo_control;
 925         unsigned long now;
 926         unsigned long expire;
 927         struct b43_lo_calib *cal, *tmp;
 928         bool current_item_expired = false;
 929         bool hwpctl;
 930
 931         if (!lo)
 932                 return;
 933         now = jiffies;
 934         hwpctl = b43_has_hardware_pctl(dev);
 935
 936         if (hwpctl) {
 937                 /* Read the power vector and update it, if needed. */
 938                 expire = now - B43_LO_PWRVEC_EXPIRE;
 939                 if (time_before(lo->pwr_vec_read_time, expire)) {
 940                         lo_read_power_vector(dev);
 941                         b43_gphy_dc_lt_init(dev, 0);
 942                 }
 943                 //FIXME Recalc the whole DC table from time to time?
 944         }
 945
 946         if (hwpctl)
 947                 return;
 948         /* Search for expired LO settings. Remove them.
 949          * Recalibrate the current setting, if expired. */
 950         expire = now - B43_LO_CALIB_EXPIRE;
 951         list_for_each_entry_safe(cal, tmp, &lo->calib_list, list) {
 952                 if (!time_before(cal->calib_time, expire))
 953                         continue;
 954                 /* This item expired. */
 955                 if (b43_compare_bbatt(&cal->bbatt, &gphy->bbatt) &&
 956                     b43_compare_rfatt(&cal->rfatt, &gphy->rfatt)) {
 957                         B43_WARN_ON(current_item_expired);
 958                         current_item_expired = true;
 959                 }
 960                 if (b43_debug(dev, B43_DBG_LO)) {
 961                         b43dbg(dev->wl, "LO: Item BB(%u), RF(%u,%u), "
 962                                "I=%d, Q=%d expired\n",
 963                                cal->bbatt.att, cal->rfatt.att,
 964                                cal->rfatt.with_padmix,
 965                                cal->ctl.i, cal->ctl.q);
 966                 }
 967                 list_del(&cal->list);
 968                 kfree(cal);
 969         }
 970         if (current_item_expired || unlikely(list_empty(&lo->calib_list))) {
 971                 /* Recalibrate currently used LO setting. */
 972                 if (b43_debug(dev, B43_DBG_LO))
 973                         b43dbg(dev->wl, "LO: Recalibrating current LO setting\n");
 974                 cal = b43_calibrate_lo_setting(dev, &gphy->bbatt, &gphy->rfatt);
 975                 if (cal) {
 976                         list_add(&cal->list, &lo->calib_list);
 977                         b43_lo_write(dev, &cal->ctl);
 978                 } else
 979                         b43warn(dev->wl, "Failed to recalibrate current LO setting\n");
 980         }
 981 }
 982
 983 void b43_lo_g_cleanup(struct b43_wldev *dev)
 984 {
 985         struct b43_txpower_lo_control *lo = dev->phy.g->lo_control;
 986         struct b43_lo_calib *cal, *tmp;
 987
 988         if (!lo)
 989                 return;
 990         list_for_each_entry_safe(cal, tmp, &lo->calib_list, list) {
 991                 list_del(&cal->list);
 992                 kfree(cal);
 993         }
 994 }
 995
 996 /* LO Initialization */
 997 void b43_lo_g_init(struct b43_wldev *dev)
 998 {
 999         if (b43_has_hardware_pctl(dev)) {
1000                 lo_read_power_vector(dev);
1001                 b43_gphy_dc_lt_init(dev, 1);
1002         }
1003 }