drivers/net/wireless/b43/lo.c

   1 /*
   2
   3   Broadcom B43 wireless driver
   4
   5   G PHY LO (LocalOscillator) Measuring and Control routines
   6
   7   Copyright (c) 2005 Martin Langer <martin-langer@gmx.de>,
   8   Copyright (c) 2005, 2006 Stefano Brivio <stefano.brivio@polimi.it>
   9   Copyright (c) 2005-2007 Michael Buesch <mb@bu3sch.de>
  10   Copyright (c) 2005, 2006 Danny van Dyk <kugelfang@gentoo.org>
  11   Copyright (c) 2005, 2006 Andreas Jaggi <andreas.jaggi@waterwave.ch>
  12
  13   This program is free software; you can redistribute it and/or modify
  14   it under the terms of the GNU General Public License as published by
  15   the Free Software Foundation; either version 2 of the License, or
  16   (at your option) any later version.
  17
  18   This program is distributed in the hope that it will be useful,
  19   but WITHOUT ANY WARRANTY; without even the implied warranty of
  20   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  21   GNU General Public License for more details.
  22
  23   You should have received a copy of the GNU General Public License
  24   along with this program; see the file COPYING.  If not, write to
  25   the Free Software Foundation, Inc., 51 Franklin Steet, Fifth Floor,
  26   Boston, MA 02110-1301, USA.
  27
  28 */
  29
  30 #include "b43.h"
  31 #include "lo.h"
  32 #include "phy.h"
  33 #include "main.h"
  34
  35 #include <linux/delay.h>
  36 #include <linux/sched.h>
  37
  38
  39 static struct b43_lo_calib * b43_find_lo_calib(struct b43_txpower_lo_control *lo,
  40                                                const struct b43_bbatt *bbatt,
  41                                                const struct b43_rfatt *rfatt)
  42 {
  43         struct b43_lo_calib *c;
  44
  45         list_for_each_entry(c, &lo->calib_list, list) {
  46                 if (!b43_compare_bbatt(&c->bbatt, bbatt))
  47                         continue;
  48                 if (!b43_compare_rfatt(&c->rfatt, rfatt))
  49                         continue;
  50                 return c;
  51         }
  52
  53         return NULL;
  54 }
  55
  56 /* Write the LocalOscillator Control (adjust) value-pair. */
  57 static void b43_lo_write(struct b43_wldev *dev, struct b43_loctl *control)
  58 {
  59         struct b43_phy *phy = &dev->phy;
  60         u16 value;
  61         u16 reg;
  62
  63         if (B43_DEBUG) {
  64                 if (unlikely(abs(control->i) > 16 || abs(control->q) > 16)) {
  65                         b43dbg(dev->wl, "Invalid LO control pair "
  66                                "(I: %d, Q: %d)\n", control->i, control->q);
  67                         dump_stack();
  68                         return;
  69                 }
  70         }
  71
  72         value = (u8) (control->q);
  73         value |= ((u8) (control->i)) << 8;
  74
  75         reg = (phy->type == B43_PHYTYPE_B) ? 0x002F : B43_PHY_LO_CTL;
  76         b43_phy_write(dev, reg, value);
  77 }
  78
  79 static u16 lo_measure_feedthrough(struct b43_wldev *dev,
  80                                   u16 lna, u16 pga, u16 trsw_rx)
  81 {
  82         struct b43_phy *phy = &dev->phy;
  83         u16 rfover;
  84         u16 feedthrough;
  85
  86         if (phy->gmode) {
  87                 lna <<= B43_PHY_RFOVERVAL_LNA_SHIFT;
  88                 pga <<= B43_PHY_RFOVERVAL_PGA_SHIFT;
  89
  90                 B43_WARN_ON(lna & ~B43_PHY_RFOVERVAL_LNA);
  91                 B43_WARN_ON(pga & ~B43_PHY_RFOVERVAL_PGA);
  92 /*FIXME This assertion fails            B43_WARN_ON(trsw_rx & ~(B43_PHY_RFOVERVAL_TRSWRX |
  93                                     B43_PHY_RFOVERVAL_BW));
  94 */
  95                 trsw_rx &= (B43_PHY_RFOVERVAL_TRSWRX | B43_PHY_RFOVERVAL_BW);
  96
  97                 /* Construct the RF Override Value */
  98                 rfover = B43_PHY_RFOVERVAL_UNK;
  99                 rfover |= pga;
 100                 rfover |= lna;
 101                 rfover |= trsw_rx;
 102                 if ((dev->dev->bus->sprom.boardflags_lo & B43_BFL_EXTLNA)
 103                     && phy->rev > 6)
 104                         rfover |= B43_PHY_RFOVERVAL_EXTLNA;
 105
 106                 b43_phy_write(dev, B43_PHY_PGACTL, 0xE300);
 107                 b43_phy_write(dev, B43_PHY_RFOVERVAL, rfover);
 108                 udelay(10);
 109                 rfover |= B43_PHY_RFOVERVAL_BW_LBW;
 110                 b43_phy_write(dev, B43_PHY_RFOVERVAL, rfover);
 111                 udelay(10);
 112                 rfover |= B43_PHY_RFOVERVAL_BW_LPF;
 113                 b43_phy_write(dev, B43_PHY_RFOVERVAL, rfover);
 114                 udelay(10);
 115                 b43_phy_write(dev, B43_PHY_PGACTL, 0xF300);
 116         } else {
 117                 pga |= B43_PHY_PGACTL_UNKNOWN;
 118                 b43_phy_write(dev, B43_PHY_PGACTL, pga);
 119                 udelay(10);
 120                 pga |= B43_PHY_PGACTL_LOWBANDW;
 121                 b43_phy_write(dev, B43_PHY_PGACTL, pga);
 122                 udelay(10);
 123                 pga |= B43_PHY_PGACTL_LPF;
 124                 b43_phy_write(dev, B43_PHY_PGACTL, pga);
 125         }
 126         udelay(21);
 127         feedthrough = b43_phy_read(dev, B43_PHY_LO_LEAKAGE);
 128
 129         /* This is a good place to check if we need to relax a bit,
 130          * as this is the main function called regularly
 131          * in the LO calibration. */
 132         cond_resched();
 133
 134         return feedthrough;
 135 }
 136
 137 /* TXCTL Register and Value Table.
 138  * Returns the "TXCTL Register".
 139  * "value" is the "TXCTL Value".
 140  * "pad_mix_gain" is the PAD Mixer Gain.
 141  */
 142 static u16 lo_txctl_register_table(struct b43_wldev *dev,
 143                                    u16 * value, u16 * pad_mix_gain)
 144 {
 145         struct b43_phy *phy = &dev->phy;
 146         u16 reg, v, padmix;
 147
 148         if (phy->type == B43_PHYTYPE_B) {
 149                 v = 0x30;
 150                 if (phy->radio_rev <= 5) {
 151                         reg = 0x43;
 152                         padmix = 0;
 153                 } else {
 154                         reg = 0x52;
 155                         padmix = 5;
 156                 }
 157         } else {
 158                 if (phy->rev >= 2 && phy->radio_rev == 8) {
 159                         reg = 0x43;
 160                         v = 0x10;
 161                         padmix = 2;
 162                 } else {
 163                         reg = 0x52;
 164                         v = 0x30;
 165                         padmix = 5;
 166                 }
 167         }
 168         if (value)
 169                 *value = v;
 170         if (pad_mix_gain)
 171                 *pad_mix_gain = padmix;
 172
 173         return reg;
 174 }
 175
 176 static void lo_measure_txctl_values(struct b43_wldev *dev)
 177 {
 178         struct b43_phy *phy = &dev->phy;
 179         struct b43_txpower_lo_control *lo = phy->lo_control;
 180         u16 reg, mask;
 181         u16 trsw_rx, pga;
 182         u16 radio_pctl_reg;
 183
 184         static const u8 tx_bias_values[] = {
 185                 0x09, 0x08, 0x0A, 0x01, 0x00,
 186                 0x02, 0x05, 0x04, 0x06,
 187         };
 188         static const u8 tx_magn_values[] = {
 189                 0x70, 0x40,
 190         };
 191
 192         if (!has_loopback_gain(phy)) {
 193                 radio_pctl_reg = 6;
 194                 trsw_rx = 2;
 195                 pga = 0;
 196         } else {
 197                 int lb_gain;    /* Loopback gain (in dB) */
 198
 199                 trsw_rx = 0;
 200                 lb_gain = phy->max_lb_gain / 2;
 201                 if (lb_gain > 10) {
 202                         radio_pctl_reg = 0;
 203                         pga = abs(10 - lb_gain) / 6;
 204                         pga = limit_value(pga, 0, 15);
 205                 } else {
 206                         int cmp_val;
 207                         int tmp;
 208
 209                         pga = 0;
 210                         cmp_val = 0x24;
 211                         if ((phy->rev >= 2) &&
 212                             (phy->radio_ver == 0x2050) && (phy->radio_rev == 8))
 213                                 cmp_val = 0x3C;
 214                         tmp = lb_gain;
 215                         if ((10 - lb_gain) < cmp_val)
 216                                 tmp = (10 - lb_gain);
 217                         if (tmp < 0)
 218                                 tmp += 6;
 219                         else
 220                                 tmp += 3;
 221                         cmp_val /= 4;
 222                         tmp /= 4;
 223                         if (tmp >= cmp_val)
 224                                 radio_pctl_reg = cmp_val;
 225                         else
 226                                 radio_pctl_reg = tmp;
 227                 }
 228         }
 229         b43_radio_write16(dev, 0x43, (b43_radio_read16(dev, 0x43)
 230                                       & 0xFFF0) | radio_pctl_reg);
 231         b43_phy_set_baseband_attenuation(dev, 2);
 232
 233         reg = lo_txctl_register_table(dev, &mask, NULL);
 234         mask = ~mask;
 235         b43_radio_write16(dev, reg, b43_radio_read16(dev, reg)
 236                           & mask);
 237
 238         if (has_tx_magnification(phy)) {
 239                 int i, j;
 240                 int feedthrough;
 241                 int min_feedth = 0xFFFF;
 242                 u8 tx_magn, tx_bias;
 243
 244                 for (i = 0; i < ARRAY_SIZE(tx_magn_values); i++) {
 245                         tx_magn = tx_magn_values[i];
 246                         b43_radio_write16(dev, 0x52,
 247                                           (b43_radio_read16(dev, 0x52)
 248                                            & 0xFF0F) | tx_magn);
 249                         for (j = 0; j < ARRAY_SIZE(tx_bias_values); j++) {
 250                                 tx_bias = tx_bias_values[j];
 251                                 b43_radio_write16(dev, 0x52,
 252                                                   (b43_radio_read16(dev, 0x52)
 253                                                    & 0xFFF0) | tx_bias);
 254                                 feedthrough =
 255                                     lo_measure_feedthrough(dev, 0, pga,
 256                                                            trsw_rx);
 257                                 if (feedthrough < min_feedth) {
 258                                         lo->tx_bias = tx_bias;
 259                                         lo->tx_magn = tx_magn;
 260                                         min_feedth = feedthrough;
 261                                 }
 262                                 if (lo->tx_bias == 0)
 263                                         break;
 264                         }
 265                         b43_radio_write16(dev, 0x52,
 266                                           (b43_radio_read16(dev, 0x52)
 267                                            & 0xFF00) | lo->tx_bias | lo->
 268                                           tx_magn);
 269                 }
 270         } else {
 271                 lo->tx_magn = 0;
 272                 lo->tx_bias = 0;
 273                 b43_radio_write16(dev, 0x52, b43_radio_read16(dev, 0x52)
 274                                   & 0xFFF0);    /* TX bias == 0 */
 275         }
 276         lo->txctl_measured_time = jiffies;
 277 }
 278
 279 static void lo_read_power_vector(struct b43_wldev *dev)
 280 {
 281         struct b43_phy *phy = &dev->phy;
 282         struct b43_txpower_lo_control *lo = phy->lo_control;
 283         int i;
 284         u64 tmp;
 285         u64 power_vector = 0;
 286
 287         for (i = 0; i < 8; i += 2) {
 288                 tmp = b43_shm_read16(dev, B43_SHM_SHARED, 0x310 + i);
 289                 power_vector |= (tmp << (i * 8));
 290                 /* Clear the vector on the device. */
 291                 b43_shm_write16(dev, B43_SHM_SHARED, 0x310 + i, 0);
 292         }
 293         if (power_vector)
 294                 lo->power_vector = power_vector;
 295         lo->pwr_vec_read_time = jiffies;
 296 }
 297
 298 /* 802.11/LO/GPHY/MeasuringGains */
 299 static void lo_measure_gain_values(struct b43_wldev *dev,
 300                                    s16 max_rx_gain, int use_trsw_rx)
 301 {
 302         struct b43_phy *phy = &dev->phy;
 303         u16 tmp;
 304
 305         if (max_rx_gain < 0)
 306                 max_rx_gain = 0;
 307
 308         if (has_loopback_gain(phy)) {
 309                 int trsw_rx = 0;
 310                 int trsw_rx_gain;
 311
 312                 if (use_trsw_rx) {
 313                         trsw_rx_gain = phy->trsw_rx_gain / 2;
 314                         if (max_rx_gain >= trsw_rx_gain) {
 315                                 trsw_rx_gain = max_rx_gain - trsw_rx_gain;
 316                                 trsw_rx = 0x20;
 317                         }
 318                 } else
 319                         trsw_rx_gain = max_rx_gain;
 320                 if (trsw_rx_gain < 9) {
 321                         phy->lna_lod_gain = 0;
 322                 } else {
 323                         phy->lna_lod_gain = 1;
 324                         trsw_rx_gain -= 8;
 325                 }
 326                 trsw_rx_gain = limit_value(trsw_rx_gain, 0, 0x2D);
 327                 phy->pga_gain = trsw_rx_gain / 3;
 328                 if (phy->pga_gain >= 5) {
 329                         phy->pga_gain -= 5;
 330                         phy->lna_gain = 2;
 331                 } else
 332                         phy->lna_gain = 0;
 333         } else {
 334                 phy->lna_gain = 0;
 335                 phy->trsw_rx_gain = 0x20;
 336                 if (max_rx_gain >= 0x14) {
 337                         phy->lna_lod_gain = 1;
 338                         phy->pga_gain = 2;
 339                 } else if (max_rx_gain >= 0x12) {
 340                         phy->lna_lod_gain = 1;
 341                         phy->pga_gain = 1;
 342                 } else if (max_rx_gain >= 0xF) {
 343                         phy->lna_lod_gain = 1;
 344                         phy->pga_gain = 0;
 345                 } else {
 346                         phy->lna_lod_gain = 0;
 347                         phy->pga_gain = 0;
 348                 }
 349         }
 350
 351         tmp = b43_radio_read16(dev, 0x7A);
 352         if (phy->lna_lod_gain == 0)
 353                 tmp &= ~0x0008;
 354         else
 355                 tmp |= 0x0008;
 356         b43_radio_write16(dev, 0x7A, tmp);
 357 }
 358
 359 struct lo_g_saved_values {
 360         u8 old_channel;
 361
 362         /* Core registers */
 363         u16 reg_3F4;
 364         u16 reg_3E2;
 365
 366         /* PHY registers */
 367         u16 phy_lo_mask;
 368         u16 phy_extg_01;
 369         u16 phy_dacctl_hwpctl;
 370         u16 phy_dacctl;
 371         u16 phy_cck_14;
 372         u16 phy_hpwr_tssictl;
 373         u16 phy_analogover;
 374         u16 phy_analogoverval;
 375         u16 phy_rfover;
 376         u16 phy_rfoverval;
 377         u16 phy_classctl;
 378         u16 phy_cck_3E;
 379         u16 phy_crs0;
 380         u16 phy_pgactl;
 381         u16 phy_cck_2A;
 382         u16 phy_syncctl;
 383         u16 phy_cck_30;
 384         u16 phy_cck_06;
 385
 386         /* Radio registers */
 387         u16 radio_43;
 388         u16 radio_7A;
 389         u16 radio_52;
 390 };
 391
 392 static void lo_measure_setup(struct b43_wldev *dev,
 393                              struct lo_g_saved_values *sav)
 394 {
 395         struct ssb_sprom *sprom = &dev->dev->bus->sprom;
 396         struct b43_phy *phy = &dev->phy;
 397         struct b43_txpower_lo_control *lo = phy->lo_control;
 398         u16 tmp;
 399
 400         if (b43_has_hardware_pctl(phy)) {
 401                 sav->phy_lo_mask = b43_phy_read(dev, B43_PHY_LO_MASK);
 402                 sav->phy_extg_01 = b43_phy_read(dev, B43_PHY_EXTG(0x01));
 403                 sav->phy_dacctl_hwpctl = b43_phy_read(dev, B43_PHY_DACCTL);
 404                 sav->phy_cck_14 = b43_phy_read(dev, B43_PHY_CCK(0x14));
 405                 sav->phy_hpwr_tssictl = b43_phy_read(dev, B43_PHY_HPWR_TSSICTL);
 406
 407                 b43_phy_write(dev, B43_PHY_HPWR_TSSICTL,
 408                               b43_phy_read(dev, B43_PHY_HPWR_TSSICTL)
 409                               | 0x100);
 410                 b43_phy_write(dev, B43_PHY_EXTG(0x01),
 411                               b43_phy_read(dev, B43_PHY_EXTG(0x01))
 412                               | 0x40);
 413                 b43_phy_write(dev, B43_PHY_DACCTL,
 414                               b43_phy_read(dev, B43_PHY_DACCTL)
 415                               | 0x40);
 416                 b43_phy_write(dev, B43_PHY_CCK(0x14),
 417                               b43_phy_read(dev, B43_PHY_CCK(0x14))
 418                               | 0x200);
 419         }
 420         if (phy->type == B43_PHYTYPE_B &&
 421             phy->radio_ver == 0x2050 && phy->radio_rev < 6) {
 422                 b43_phy_write(dev, B43_PHY_CCK(0x16), 0x410);
 423                 b43_phy_write(dev, B43_PHY_CCK(0x17), 0x820);
 424         }
 425         if (phy->rev >= 2) {
 426                 sav->phy_analogover = b43_phy_read(dev, B43_PHY_ANALOGOVER);
 427                 sav->phy_analogoverval =
 428                     b43_phy_read(dev, B43_PHY_ANALOGOVERVAL);
 429                 sav->phy_rfover = b43_phy_read(dev, B43_PHY_RFOVER);
 430                 sav->phy_rfoverval = b43_phy_read(dev, B43_PHY_RFOVERVAL);
 431                 sav->phy_classctl = b43_phy_read(dev, B43_PHY_CLASSCTL);
 432                 sav->phy_cck_3E = b43_phy_read(dev, B43_PHY_CCK(0x3E));
 433                 sav->phy_crs0 = b43_phy_read(dev, B43_PHY_CRS0);
 434
 435                 b43_phy_write(dev, B43_PHY_CLASSCTL,
 436                               b43_phy_read(dev, B43_PHY_CLASSCTL)
 437                               & 0xFFFC);
 438                 b43_phy_write(dev, B43_PHY_CRS0, b43_phy_read(dev, B43_PHY_CRS0)
 439                               & 0x7FFF);
 440                 b43_phy_write(dev, B43_PHY_ANALOGOVER,
 441                               b43_phy_read(dev, B43_PHY_ANALOGOVER)
 442                               | 0x0003);
 443                 b43_phy_write(dev, B43_PHY_ANALOGOVERVAL,
 444                               b43_phy_read(dev, B43_PHY_ANALOGOVERVAL)
 445                               & 0xFFFC);
 446                 if (phy->type == B43_PHYTYPE_G) {
 447                         if ((phy->rev >= 7) &&
 448                             (sprom->boardflags_lo & B43_BFL_EXTLNA)) {
 449                                 b43_phy_write(dev, B43_PHY_RFOVER, 0x933);
 450                         } else {
 451                                 b43_phy_write(dev, B43_PHY_RFOVER, 0x133);
 452                         }
 453                 } else {
 454                         b43_phy_write(dev, B43_PHY_RFOVER, 0);
 455                 }
 456                 b43_phy_write(dev, B43_PHY_CCK(0x3E), 0);
 457         }
 458         sav->reg_3F4 = b43_read16(dev, 0x3F4);
 459         sav->reg_3E2 = b43_read16(dev, 0x3E2);
 460         sav->radio_43 = b43_radio_read16(dev, 0x43);
 461         sav->radio_7A = b43_radio_read16(dev, 0x7A);
 462         sav->phy_pgactl = b43_phy_read(dev, B43_PHY_PGACTL);
 463         sav->phy_cck_2A = b43_phy_read(dev, B43_PHY_CCK(0x2A));
 464         sav->phy_syncctl = b43_phy_read(dev, B43_PHY_SYNCCTL);
 465         sav->phy_dacctl = b43_phy_read(dev, B43_PHY_DACCTL);
 466
 467         if (!has_tx_magnification(phy)) {
 468                 sav->radio_52 = b43_radio_read16(dev, 0x52);
 469                 sav->radio_52 &= 0x00F0;
 470         }
 471         if (phy->type == B43_PHYTYPE_B) {
 472                 sav->phy_cck_30 = b43_phy_read(dev, B43_PHY_CCK(0x30));
 473                 sav->phy_cck_06 = b43_phy_read(dev, B43_PHY_CCK(0x06));
 474                 b43_phy_write(dev, B43_PHY_CCK(0x30), 0x00FF);
 475                 b43_phy_write(dev, B43_PHY_CCK(0x06), 0x3F3F);
 476         } else {
 477                 b43_write16(dev, 0x3E2, b43_read16(dev, 0x3E2)
 478                             | 0x8000);
 479         }
 480         b43_write16(dev, 0x3F4, b43_read16(dev, 0x3F4)
 481                     & 0xF000);
 482
 483         tmp =
 484             (phy->type == B43_PHYTYPE_G) ? B43_PHY_LO_MASK : B43_PHY_CCK(0x2E);
 485         b43_phy_write(dev, tmp, 0x007F);
 486
 487         tmp = sav->phy_syncctl;
 488         b43_phy_write(dev, B43_PHY_SYNCCTL, tmp & 0xFF7F);
 489         tmp = sav->radio_7A;
 490         b43_radio_write16(dev, 0x007A, tmp & 0xFFF0);
 491
 492         b43_phy_write(dev, B43_PHY_CCK(0x2A), 0x8A3);
 493         if (phy->type == B43_PHYTYPE_G ||
 494             (phy->type == B43_PHYTYPE_B &&
 495              phy->radio_ver == 0x2050 && phy->radio_rev >= 6)) {
 496                 b43_phy_write(dev, B43_PHY_CCK(0x2B), 0x1003);
 497         } else
 498                 b43_phy_write(dev, B43_PHY_CCK(0x2B), 0x0802);
 499         if (phy->rev >= 2)
 500                 b43_dummy_transmission(dev);
 501         b43_radio_selectchannel(dev, 6, 0);
 502         b43_radio_read16(dev, 0x51);    /* dummy read */
 503         if (phy->type == B43_PHYTYPE_G)
 504                 b43_phy_write(dev, B43_PHY_CCK(0x2F), 0);
 505
 506         /* Re-measure the txctl values, if needed. */
 507         if (time_before(lo->txctl_measured_time,
 508                         jiffies - B43_LO_TXCTL_EXPIRE))
 509                 lo_measure_txctl_values(dev);
 510
 511         if (phy->type == B43_PHYTYPE_G && phy->rev >= 3) {
 512                 b43_phy_write(dev, B43_PHY_LO_MASK, 0xC078);
 513         } else {
 514                 if (phy->type == B43_PHYTYPE_B)
 515                         b43_phy_write(dev, B43_PHY_CCK(0x2E), 0x8078);
 516                 else
 517                         b43_phy_write(dev, B43_PHY_LO_MASK, 0x8078);
 518         }
 519 }
 520
 521 static void lo_measure_restore(struct b43_wldev *dev,
 522                                struct lo_g_saved_values *sav)
 523 {
 524         struct b43_phy *phy = &dev->phy;
 525         u16 tmp;
 526
 527         if (phy->rev >= 2) {
 528                 b43_phy_write(dev, B43_PHY_PGACTL, 0xE300);
 529                 tmp = (phy->pga_gain << 8);
 530                 b43_phy_write(dev, B43_PHY_RFOVERVAL, tmp | 0xA0);
 531                 udelay(5);
 532                 b43_phy_write(dev, B43_PHY_RFOVERVAL, tmp | 0xA2);
 533                 udelay(2);
 534                 b43_phy_write(dev, B43_PHY_RFOVERVAL, tmp | 0xA3);
 535         } else {
 536                 tmp = (phy->pga_gain | 0xEFA0);
 537                 b43_phy_write(dev, B43_PHY_PGACTL, tmp);
 538         }
 539         if (phy->type == B43_PHYTYPE_G) {
 540                 if (phy->rev >= 3)
 541                         b43_phy_write(dev, B43_PHY_CCK(0x2E), 0xC078);
 542                 else
 543                         b43_phy_write(dev, B43_PHY_CCK(0x2E), 0x8078);
 544                 if (phy->rev >= 2)
 545                         b43_phy_write(dev, B43_PHY_CCK(0x2F), 0x0202);
 546                 else
 547                         b43_phy_write(dev, B43_PHY_CCK(0x2F), 0x0101);
 548         }
 549         b43_write16(dev, 0x3F4, sav->reg_3F4);
 550         b43_phy_write(dev, B43_PHY_PGACTL, sav->phy_pgactl);
 551         b43_phy_write(dev, B43_PHY_CCK(0x2A), sav->phy_cck_2A);
 552         b43_phy_write(dev, B43_PHY_SYNCCTL, sav->phy_syncctl);
 553         b43_phy_write(dev, B43_PHY_DACCTL, sav->phy_dacctl);
 554         b43_radio_write16(dev, 0x43, sav->radio_43);
 555         b43_radio_write16(dev, 0x7A, sav->radio_7A);
 556         if (!has_tx_magnification(phy)) {
 557                 tmp = sav->radio_52;
 558                 b43_radio_write16(dev, 0x52, (b43_radio_read16(dev, 0x52)
 559                                               & 0xFF0F) | tmp);
 560         }
 561         b43_write16(dev, 0x3E2, sav->reg_3E2);
 562         if (phy->type == B43_PHYTYPE_B &&
 563             phy->radio_ver == 0x2050 && phy->radio_rev <= 5) {
 564                 b43_phy_write(dev, B43_PHY_CCK(0x30), sav->phy_cck_30);
 565                 b43_phy_write(dev, B43_PHY_CCK(0x06), sav->phy_cck_06);
 566         }
 567         if (phy->rev >= 2) {
 568                 b43_phy_write(dev, B43_PHY_ANALOGOVER, sav->phy_analogover);
 569                 b43_phy_write(dev, B43_PHY_ANALOGOVERVAL,
 570                               sav->phy_analogoverval);
 571                 b43_phy_write(dev, B43_PHY_CLASSCTL, sav->phy_classctl);
 572                 b43_phy_write(dev, B43_PHY_RFOVER, sav->phy_rfover);
 573                 b43_phy_write(dev, B43_PHY_RFOVERVAL, sav->phy_rfoverval);
 574                 b43_phy_write(dev, B43_PHY_CCK(0x3E), sav->phy_cck_3E);
 575                 b43_phy_write(dev, B43_PHY_CRS0, sav->phy_crs0);
 576         }
 577         if (b43_has_hardware_pctl(phy)) {
 578                 tmp = (sav->phy_lo_mask & 0xBFFF);
 579                 b43_phy_write(dev, B43_PHY_LO_MASK, tmp);
 580                 b43_phy_write(dev, B43_PHY_EXTG(0x01), sav->phy_extg_01);
 581                 b43_phy_write(dev, B43_PHY_DACCTL, sav->phy_dacctl_hwpctl);
 582                 b43_phy_write(dev, B43_PHY_CCK(0x14), sav->phy_cck_14);
 583                 b43_phy_write(dev, B43_PHY_HPWR_TSSICTL, sav->phy_hpwr_tssictl);
 584         }
 585         b43_radio_selectchannel(dev, sav->old_channel, 1);
 586 }
 587
 588 struct b43_lo_g_statemachine {
 589         int current_state;
 590         int nr_measured;
 591         int state_val_multiplier;
 592         u16 lowest_feedth;
 593         struct b43_loctl min_loctl;
 594 };
 595
 596 /* Loop over each possible value in this state. */
 597 static int lo_probe_possible_loctls(struct b43_wldev *dev,
 598                                     struct b43_loctl *probe_loctl,
 599                                     struct b43_lo_g_statemachine *d)
 600 {
 601         struct b43_phy *phy = &dev->phy;
 602         struct b43_loctl test_loctl;
 603         struct b43_loctl orig_loctl;
 604         struct b43_loctl prev_loctl = {
 605                 .i = -100,
 606                 .q = -100,
 607         };
 608         int i;
 609         int begin, end;
 610         int found_lower = 0;
 611         u16 feedth;
 612
 613         static const struct b43_loctl modifiers[] = {
 614                 {.i = 1,.q = 1,},
 615                 {.i = 1,.q = 0,},
 616                 {.i = 1,.q = -1,},
 617                 {.i = 0,.q = -1,},
 618                 {.i = -1,.q = -1,},
 619                 {.i = -1,.q = 0,},
 620                 {.i = -1,.q = 1,},
 621                 {.i = 0,.q = 1,},
 622         };
 623
 624         if (d->current_state == 0) {
 625                 begin = 1;
 626                 end = 8;
 627         } else if (d->current_state % 2 == 0) {
 628                 begin = d->current_state - 1;
 629                 end = d->current_state + 1;
 630         } else {
 631                 begin = d->current_state - 2;
 632                 end = d->current_state + 2;
 633         }
 634         if (begin < 1)
 635                 begin += 8;
 636         if (end > 8)
 637                 end -= 8;
 638
 639         memcpy(&orig_loctl, probe_loctl, sizeof(struct b43_loctl));
 640         i = begin;
 641         d->current_state = i;
 642         while (1) {
 643                 B43_WARN_ON(!(i >= 1 && i <= 8));
 644                 memcpy(&test_loctl, &orig_loctl, sizeof(struct b43_loctl));
 645                 test_loctl.i += modifiers[i - 1].i * d->state_val_multiplier;
 646                 test_loctl.q += modifiers[i - 1].q * d->state_val_multiplier;
 647                 if ((test_loctl.i != prev_loctl.i ||
 648                      test_loctl.q != prev_loctl.q) &&
 649                     (abs(test_loctl.i) <= 16 && abs(test_loctl.q) <= 16)) {
 650                         b43_lo_write(dev, &test_loctl);
 651                         feedth = lo_measure_feedthrough(dev, phy->lna_gain,
 652                                                         phy->pga_gain,
 653                                                         phy->trsw_rx_gain);
 654                         if (feedth < d->lowest_feedth) {
 655                                 memcpy(probe_loctl, &test_loctl,
 656                                        sizeof(struct b43_loctl));
 657                                 found_lower = 1;
 658                                 d->lowest_feedth = feedth;
 659                                 if ((d->nr_measured < 2) &&
 660                                     !has_loopback_gain(phy))
 661                                         break;
 662                         }
 663                 }
 664                 memcpy(&prev_loctl, &test_loctl, sizeof(prev_loctl));
 665                 if (i == end)
 666                         break;
 667                 if (i == 8)
 668                         i = 1;
 669                 else
 670                         i++;
 671                 d->current_state = i;
 672         }
 673
 674         return found_lower;
 675 }
 676
 677 static void lo_probe_loctls_statemachine(struct b43_wldev *dev,
 678                                          struct b43_loctl *loctl,
 679                                          int *max_rx_gain)
 680 {
 681         struct b43_phy *phy = &dev->phy;
 682         struct b43_lo_g_statemachine d;
 683         u16 feedth;
 684         int found_lower;
 685         struct b43_loctl probe_loctl;
 686         int max_repeat = 1, repeat_cnt = 0;
 687
 688         d.nr_measured = 0;
 689         d.state_val_multiplier = 1;
 690         if (has_loopback_gain(phy))
 691                 d.state_val_multiplier = 3;
 692
 693         memcpy(&d.min_loctl, loctl, sizeof(struct b43_loctl));
 694         if (has_loopback_gain(phy))
 695                 max_repeat = 4;
 696         do {
 697                 b43_lo_write(dev, &d.min_loctl);
 698                 feedth = lo_measure_feedthrough(dev, phy->lna_gain,
 699                                                 phy->pga_gain,
 700                                                 phy->trsw_rx_gain);
 701                 if (feedth < 0x258) {
 702                         if (feedth >= 0x12C)
 703                                 *max_rx_gain += 6;
 704                         else
 705                                 *max_rx_gain += 3;
 706                         feedth = lo_measure_feedthrough(dev, phy->lna_gain,
 707                                                         phy->pga_gain,
 708                                                         phy->trsw_rx_gain);
 709                 }
 710                 d.lowest_feedth = feedth;
 711
 712                 d.current_state = 0;
 713                 do {
 714                         B43_WARN_ON(!
 715                                     (d.current_state >= 0
 716                                      && d.current_state <= 8));
 717                         memcpy(&probe_loctl, &d.min_loctl,
 718                                sizeof(struct b43_loctl));
 719                         found_lower =
 720                             lo_probe_possible_loctls(dev, &probe_loctl, &d);
 721                         if (!found_lower)
 722                                 break;
 723                         if ((probe_loctl.i == d.min_loctl.i) &&
 724                             (probe_loctl.q == d.min_loctl.q))
 725                                 break;
 726                         memcpy(&d.min_loctl, &probe_loctl,
 727                                sizeof(struct b43_loctl));
 728                         d.nr_measured++;
 729                 } while (d.nr_measured < 24);
 730                 memcpy(loctl, &d.min_loctl, sizeof(struct b43_loctl));
 731
 732                 if (has_loopback_gain(phy)) {
 733                         if (d.lowest_feedth > 0x1194)
 734                                 *max_rx_gain -= 6;
 735                         else if (d.lowest_feedth < 0x5DC)
 736                                 *max_rx_gain += 3;
 737                         if (repeat_cnt == 0) {
 738                                 if (d.lowest_feedth <= 0x5DC) {
 739                                         d.state_val_multiplier = 1;
 740                                         repeat_cnt++;
 741                                 } else
 742                                         d.state_val_multiplier = 2;
 743                         } else if (repeat_cnt == 2)
 744                                 d.state_val_multiplier = 1;
 745                 }
 746                 lo_measure_gain_values(dev, *max_rx_gain,
 747                                        has_loopback_gain(phy));
 748         } while (++repeat_cnt < max_repeat);
 749 }
 750
 751 static
 752 struct b43_lo_calib * b43_calibrate_lo_setting(struct b43_wldev *dev,
 753                                                const struct b43_bbatt *bbatt,
 754                                                const struct b43_rfatt *rfatt)
 755 {
 756         struct b43_phy *phy = &dev->phy;
 757         struct b43_loctl loctl = {
 758                 .i = 0,
 759                 .q = 0,
 760         };
 761         int max_rx_gain;
 762         struct b43_lo_calib *cal;
 763         struct lo_g_saved_values uninitialized_var(saved_regs);
 764         /* Values from the "TXCTL Register and Value Table" */
 765         u16 txctl_reg;
 766         u16 txctl_value;
 767         u16 pad_mix_gain;
 768
 769         saved_regs.old_channel = phy->channel;
 770         b43_mac_suspend(dev);
 771         lo_measure_setup(dev, &saved_regs);
 772
 773         txctl_reg = lo_txctl_register_table(dev, &txctl_value, &pad_mix_gain);
 774
 775         b43_radio_write16(dev, 0x43,
 776                           (b43_radio_read16(dev, 0x43) & 0xFFF0)
 777                           | rfatt->att);
 778         b43_radio_write16(dev, txctl_reg,
 779                           (b43_radio_read16(dev, txctl_reg) & ~txctl_value)
 780                           | (rfatt->with_padmix) ? txctl_value : 0);
 781
 782         max_rx_gain = rfatt->att * 2;
 783         max_rx_gain += bbatt->att / 2;
 784         if (rfatt->with_padmix)
 785                 max_rx_gain -= pad_mix_gain;
 786         if (has_loopback_gain(phy))
 787                 max_rx_gain += phy->max_lb_gain;
 788         lo_measure_gain_values(dev, max_rx_gain,
 789                                has_loopback_gain(phy));
 790
 791         b43_phy_set_baseband_attenuation(dev, bbatt->att);
 792         lo_probe_loctls_statemachine(dev, &loctl, &max_rx_gain);
 793
 794         lo_measure_restore(dev, &saved_regs);
 795         b43_mac_enable(dev);
 796
 797         if (b43_debug(dev, B43_DBG_LO)) {
 798                 b43dbg(dev->wl, "LO: Calibrated for BB(%u), RF(%u,%u) "
 799                        "=> I=%d Q=%d\n",
 800                        bbatt->att, rfatt->att, rfatt->with_padmix,
 801                        loctl.i, loctl.q);
 802         }
 803
 804         cal = kmalloc(sizeof(*cal), GFP_KERNEL);
 805         if (!cal) {
 806                 b43warn(dev->wl, "LO calib: out of memory\n");
 807                 return NULL;
 808         }
 809         memcpy(&cal->bbatt, bbatt, sizeof(*bbatt));
 810         memcpy(&cal->rfatt, rfatt, sizeof(*rfatt));
 811         memcpy(&cal->ctl, &loctl, sizeof(loctl));
 812         cal->calib_time = jiffies;
 813         INIT_LIST_HEAD(&cal->list);
 814
 815         return cal;
 816 }
 817
 818 /* Get a calibrated LO setting for the given attenuation values.
 819  * Might return a NULL pointer under OOM! */
 820 static
 821 struct b43_lo_calib * b43_get_calib_lo_settings(struct b43_wldev *dev,
 822                                                 const struct b43_bbatt *bbatt,
 823                                                 const struct b43_rfatt *rfatt)
 824 {
 825         struct b43_txpower_lo_control *lo = dev->phy.lo_control;
 826         struct b43_lo_calib *c;
 827
 828         c = b43_find_lo_calib(lo, bbatt, rfatt);
 829         if (c)
 830                 return c;
 831         /* Not in the list of calibrated LO settings.
 832          * Calibrate it now. */
 833         c = b43_calibrate_lo_setting(dev, bbatt, rfatt);
 834         if (!c)
 835                 return NULL;
 836         list_add(&c->list, &lo->calib_list);
 837
 838         return c;
 839 }
 840
 841 void b43_gphy_dc_lt_init(struct b43_wldev *dev, bool update_all)
 842 {
 843         struct b43_phy *phy = &dev->phy;
 844         struct b43_txpower_lo_control *lo = phy->lo_control;
 845         int i;
 846         int rf_offset, bb_offset;
 847         const struct b43_rfatt *rfatt;
 848         const struct b43_bbatt *bbatt;
 849         u64 power_vector;
 850         bool table_changed = 0;
 851
 852         BUILD_BUG_ON(B43_DC_LT_SIZE != 32);
 853         B43_WARN_ON(lo->rfatt_list.len * lo->bbatt_list.len > 64);
 854
 855         power_vector = lo->power_vector;
 856         if (!update_all && !power_vector)
 857                 return; /* Nothing to do. */
 858
 859         /* Suspend the MAC now to avoid continuous suspend/enable
 860          * cycles in the loop. */
 861         b43_mac_suspend(dev);
 862
 863         for (i = 0; i < B43_DC_LT_SIZE * 2; i++) {
 864                 struct b43_lo_calib *cal;
 865                 int idx;
 866                 u16 val;
 867
 868                 if (!update_all && !(power_vector & (((u64)1ULL) << i)))
 869                         continue;
 870                 /* Update the table entry for this power_vector bit.
 871                  * The table rows are RFatt entries and columns are BBatt. */
 872                 bb_offset = i / lo->rfatt_list.len;
 873                 rf_offset = i % lo->rfatt_list.len;
 874                 bbatt = &(lo->bbatt_list.list[bb_offset]);
 875                 rfatt = &(lo->rfatt_list.list[rf_offset]);
 876
 877                 cal = b43_calibrate_lo_setting(dev, bbatt, rfatt);
 878                 if (!cal) {
 879                         b43warn(dev->wl, "LO: Could not "
 880                                 "calibrate DC table entry\n");
 881                         continue;
 882                 }
 883                 /*FIXME: Is Q really in the low nibble? */
 884                 val = (u8)(cal->ctl.q);
 885                 val |= ((u8)(cal->ctl.i)) << 4;
 886                 kfree(cal);
 887
 888                 /* Get the index into the hardware DC LT. */
 889                 idx = i / 2;
 890                 /* Change the table in memory. */
 891                 if (i % 2) {
 892                         /* Change the high byte. */
 893                         lo->dc_lt[idx] = (lo->dc_lt[idx] & 0x00FF)
 894                                          | ((val & 0x00FF) << 8);
 895                 } else {
 896                         /* Change the low byte. */
 897                         lo->dc_lt[idx] = (lo->dc_lt[idx] & 0xFF00)
 898                                          | (val & 0x00FF);
 899                 }
 900                 table_changed = 1;
 901         }
 902         if (table_changed) {
 903                 /* The table changed in memory. Update the hardware table. */
 904                 for (i = 0; i < B43_DC_LT_SIZE; i++)
 905                         b43_phy_write(dev, 0x3A0 + i, lo->dc_lt[i]);
 906         }
 907         b43_mac_enable(dev);
 908 }
 909
 910 /* Fixup the RF attenuation value for the case where we are
 911  * using the PAD mixer. */
 912 static inline void b43_lo_fixup_rfatt(struct b43_rfatt *rf)
 913 {
 914         if (!rf->with_padmix)
 915                 return;
 916         if ((rf->att != 1) && (rf->att != 2) && (rf->att != 3))
 917                 rf->att = 4;
 918 }
 919
 920 void b43_lo_g_adjust(struct b43_wldev *dev)
 921 {
 922         struct b43_phy *phy = &dev->phy;
 923         struct b43_lo_calib *cal;
 924         struct b43_rfatt rf;
 925
 926         memcpy(&rf, &phy->rfatt, sizeof(rf));
 927         b43_lo_fixup_rfatt(&rf);
 928
 929         cal = b43_get_calib_lo_settings(dev, &phy->bbatt, &rf);
 930         if (!cal)
 931                 return;
 932         b43_lo_write(dev, &cal->ctl);
 933 }
 934
 935 void b43_lo_g_adjust_to(struct b43_wldev *dev,
 936                         u16 rfatt, u16 bbatt, u16 tx_control)
 937 {
 938         struct b43_rfatt rf;
 939         struct b43_bbatt bb;
 940         struct b43_lo_calib *cal;
 941
 942         memset(&rf, 0, sizeof(rf));
 943         memset(&bb, 0, sizeof(bb));
 944         rf.att = rfatt;
 945         bb.att = bbatt;
 946         b43_lo_fixup_rfatt(&rf);
 947         cal = b43_get_calib_lo_settings(dev, &bb, &rf);
 948         if (!cal)
 949                 return;
 950         b43_lo_write(dev, &cal->ctl);
 951 }
 952
 953 /* Periodic LO maintanance work */
 954 void b43_lo_g_maintanance_work(struct b43_wldev *dev)
 955 {
 956         struct b43_phy *phy = &dev->phy;
 957         struct b43_txpower_lo_control *lo = phy->lo_control;
 958         unsigned long now;
 959         unsigned long expire;
 960         struct b43_lo_calib *cal, *tmp;
 961         bool current_item_expired = 0;
 962         bool hwpctl;
 963
 964         if (!lo)
 965                 return;
 966         now = jiffies;
 967         hwpctl = b43_has_hardware_pctl(phy);
 968
 969         if (hwpctl) {
 970                 /* Read the power vector and update it, if needed. */
 971                 expire = now - B43_LO_PWRVEC_EXPIRE;
 972                 if (time_before(lo->pwr_vec_read_time, expire)) {
 973                         lo_read_power_vector(dev);
 974                         b43_gphy_dc_lt_init(dev, 0);
 975                 }
 976                 //FIXME Recalc the whole DC table from time to time?
 977         }
 978
 979         if (hwpctl)
 980                 return;
 981         /* Search for expired LO settings. Remove them.
 982          * Recalibrate the current setting, if expired. */
 983         expire = now - B43_LO_CALIB_EXPIRE;
 984         list_for_each_entry_safe(cal, tmp, &lo->calib_list, list) {
 985                 if (!time_before(cal->calib_time, expire))
 986                         continue;
 987                 /* This item expired. */
 988                 if (b43_compare_bbatt(&cal->bbatt, &phy->bbatt) &&
 989                     b43_compare_rfatt(&cal->rfatt, &phy->rfatt)) {
 990                         B43_WARN_ON(current_item_expired);
 991                         current_item_expired = 1;
 992                 }
 993                 if (b43_debug(dev, B43_DBG_LO)) {
 994                         b43dbg(dev->wl, "LO: Item BB(%u), RF(%u,%u), "
 995                                "I=%d, Q=%d expired\n",
 996                                cal->bbatt.att, cal->rfatt.att,
 997                                cal->rfatt.with_padmix,
 998                                cal->ctl.i, cal->ctl.q);
 999                 }
1000                 list_del(&cal->list);
1001                 kfree(cal);
1002         }
1003         if (current_item_expired || unlikely(list_empty(&lo->calib_list))) {
1004                 /* Recalibrate currently used LO setting. */
1005                 if (b43_debug(dev, B43_DBG_LO))
1006                         b43dbg(dev->wl, "LO: Recalibrating current LO setting\n");
1007                 cal = b43_calibrate_lo_setting(dev, &phy->bbatt, &phy->rfatt);
1008                 if (cal) {
1009                         list_add(&cal->list, &lo->calib_list);
1010                         b43_lo_write(dev, &cal->ctl);
1011                 } else
1012                         b43warn(dev->wl, "Failed to recalibrate current LO setting\n");
1013         }
1014 }
1015
1016 void b43_lo_g_cleanup(struct b43_wldev *dev)
1017 {
1018         struct b43_txpower_lo_control *lo = dev->phy.lo_control;
1019         struct b43_lo_calib *cal, *tmp;
1020
1021         if (!lo)
1022                 return;
1023         list_for_each_entry_safe(cal, tmp, &lo->calib_list, list) {
1024                 list_del(&cal->list);
1025                 kfree(cal);
1026         }
1027 }
1028
1029 /* LO Initialization */
1030 void b43_lo_g_init(struct b43_wldev *dev)
1031 {
1032         struct b43_phy *phy = &dev->phy;
1033
1034         if (b43_has_hardware_pctl(phy)) {
1035                 lo_read_power_vector(dev);
1036                 b43_gphy_dc_lt_init(dev, 1);
1037         }
1038 }