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