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_g.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_phy_g *gphy = phy->g;
 178         struct b43_txpower_lo_control *lo = gphy->lo_control;
 179         u16 reg, mask;
 180         u16 trsw_rx, pga;
 181         u16 radio_pctl_reg;
 182
 183         static const u8 tx_bias_values[] = {
 184                 0x09, 0x08, 0x0A, 0x01, 0x00,
 185                 0x02, 0x05, 0x04, 0x06,
 186         };
 187         static const u8 tx_magn_values[] = {
 188                 0x70, 0x40,
 189         };
 190
 191         if (!has_loopback_gain(phy)) {
 192                 radio_pctl_reg = 6;
 193                 trsw_rx = 2;
 194                 pga = 0;
 195         } else {
 196                 int lb_gain;    /* Loopback gain (in dB) */
 197
 198                 trsw_rx = 0;
 199                 lb_gain = gphy->max_lb_gain / 2;
 200                 if (lb_gain > 10) {
 201                         radio_pctl_reg = 0;
 202                         pga = abs(10 - lb_gain) / 6;
 203                         pga = clamp_val(pga, 0, 15);
 204                 } else {
 205                         int cmp_val;
 206                         int tmp;
 207
 208                         pga = 0;
 209                         cmp_val = 0x24;
 210                         if ((phy->rev >= 2) &&
 211                             (phy->radio_ver == 0x2050) && (phy->radio_rev == 8))
 212                                 cmp_val = 0x3C;
 213                         tmp = lb_gain;
 214                         if ((10 - lb_gain) < cmp_val)
 215                                 tmp = (10 - lb_gain);
 216                         if (tmp < 0)
 217                                 tmp += 6;
 218                         else
 219                                 tmp += 3;
 220                         cmp_val /= 4;
 221                         tmp /= 4;
 222                         if (tmp >= cmp_val)
 223                                 radio_pctl_reg = cmp_val;
 224                         else
 225                                 radio_pctl_reg = tmp;
 226                 }
 227         }
 228         b43_radio_write16(dev, 0x43, (b43_radio_read16(dev, 0x43)
 229                                       & 0xFFF0) | radio_pctl_reg);
 230         b43_gphy_set_baseband_attenuation(dev, 2);
 231
 232         reg = lo_txctl_register_table(dev, &mask, NULL);
 233         mask = ~mask;
 234         b43_radio_write16(dev, reg, b43_radio_read16(dev, reg)
 235                           & mask);
 236
 237         if (has_tx_magnification(phy)) {
 238                 int i, j;
 239                 int feedthrough;
 240                 int min_feedth = 0xFFFF;
 241                 u8 tx_magn, tx_bias;
 242
 243                 for (i = 0; i < ARRAY_SIZE(tx_magn_values); i++) {
 244                         tx_magn = tx_magn_values[i];
 245                         b43_radio_write16(dev, 0x52,
 246                                           (b43_radio_read16(dev, 0x52)
 247                                            & 0xFF0F) | tx_magn);
 248                         for (j = 0; j < ARRAY_SIZE(tx_bias_values); j++) {
 249                                 tx_bias = tx_bias_values[j];
 250                                 b43_radio_write16(dev, 0x52,
 251                                                   (b43_radio_read16(dev, 0x52)
 252                                                    & 0xFFF0) | tx_bias);
 253                                 feedthrough =
 254                                     lo_measure_feedthrough(dev, 0, pga,
 255                                                            trsw_rx);
 256                                 if (feedthrough < min_feedth) {
 257                                         lo->tx_bias = tx_bias;
 258                                         lo->tx_magn = tx_magn;
 259                                         min_feedth = feedthrough;
 260                                 }
 261                                 if (lo->tx_bias == 0)
 262                                         break;
 263                         }
 264                         b43_radio_write16(dev, 0x52,
 265                                           (b43_radio_read16(dev, 0x52)
 266                                            & 0xFF00) | lo->tx_bias | lo->
 267                                           tx_magn);
 268                 }
 269         } else {
 270                 lo->tx_magn = 0;
 271                 lo->tx_bias = 0;
 272                 b43_radio_write16(dev, 0x52, b43_radio_read16(dev, 0x52)
 273                                   & 0xFFF0);    /* TX bias == 0 */
 274         }
 275         lo->txctl_measured_time = jiffies;
 276 }
 277
 278 static void lo_read_power_vector(struct b43_wldev *dev)
 279 {
 280         struct b43_phy *phy = &dev->phy;
 281         struct b43_phy_g *gphy = phy->g;
 282         struct b43_txpower_lo_control *lo = gphy->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         struct b43_phy_g *gphy = phy->g;
 304         u16 tmp;
 305
 306         if (max_rx_gain < 0)
 307                 max_rx_gain = 0;
 308
 309         if (has_loopback_gain(phy)) {
 310                 int trsw_rx = 0;
 311                 int trsw_rx_gain;
 312
 313                 if (use_trsw_rx) {
 314                         trsw_rx_gain = gphy->trsw_rx_gain / 2;
 315                         if (max_rx_gain >= trsw_rx_gain) {
 316                                 trsw_rx_gain = max_rx_gain - trsw_rx_gain;
 317                                 trsw_rx = 0x20;
 318                         }
 319                 } else
 320                         trsw_rx_gain = max_rx_gain;
 321                 if (trsw_rx_gain < 9) {
 322                         gphy->lna_lod_gain = 0;
 323                 } else {
 324                         gphy->lna_lod_gain = 1;
 325                         trsw_rx_gain -= 8;
 326                 }
 327                 trsw_rx_gain = clamp_val(trsw_rx_gain, 0, 0x2D);
 328                 gphy->pga_gain = trsw_rx_gain / 3;
 329                 if (gphy->pga_gain >= 5) {
 330                         gphy->pga_gain -= 5;
 331                         gphy->lna_gain = 2;
 332                 } else
 333                         gphy->lna_gain = 0;
 334         } else {
 335                 gphy->lna_gain = 0;
 336                 gphy->trsw_rx_gain = 0x20;
 337                 if (max_rx_gain >= 0x14) {
 338                         gphy->lna_lod_gain = 1;
 339                         gphy->pga_gain = 2;
 340                 } else if (max_rx_gain >= 0x12) {
 341                         gphy->lna_lod_gain = 1;
 342                         gphy->pga_gain = 1;
 343                 } else if (max_rx_gain >= 0xF) {
 344                         gphy->lna_lod_gain = 1;
 345                         gphy->pga_gain = 0;
 346                 } else {
 347                         gphy->lna_lod_gain = 0;
 348                         gphy->pga_gain = 0;
 349                 }
 350         }
 351
 352         tmp = b43_radio_read16(dev, 0x7A);
 353         if (gphy->lna_lod_gain == 0)
 354                 tmp &= ~0x0008;
 355         else
 356                 tmp |= 0x0008;
 357         b43_radio_write16(dev, 0x7A, tmp);
 358 }
 359
 360 struct lo_g_saved_values {
 361         u8 old_channel;
 362
 363         /* Core registers */
 364         u16 reg_3F4;
 365         u16 reg_3E2;
 366
 367         /* PHY registers */
 368         u16 phy_lo_mask;
 369         u16 phy_extg_01;
 370         u16 phy_dacctl_hwpctl;
 371         u16 phy_dacctl;
 372         u16 phy_cck_14;
 373         u16 phy_hpwr_tssictl;
 374         u16 phy_analogover;
 375         u16 phy_analogoverval;
 376         u16 phy_rfover;
 377         u16 phy_rfoverval;
 378         u16 phy_classctl;
 379         u16 phy_cck_3E;
 380         u16 phy_crs0;
 381         u16 phy_pgactl;
 382         u16 phy_cck_2A;
 383         u16 phy_syncctl;
 384         u16 phy_cck_30;
 385         u16 phy_cck_06;
 386
 387         /* Radio registers */
 388         u16 radio_43;
 389         u16 radio_7A;
 390         u16 radio_52;
 391 };
 392
 393 static void lo_measure_setup(struct b43_wldev *dev,
 394                              struct lo_g_saved_values *sav)
 395 {
 396         struct ssb_sprom *sprom = &dev->dev->bus->sprom;
 397         struct b43_phy *phy = &dev->phy;
 398         struct b43_phy_g *gphy = phy->g;
 399         struct b43_txpower_lo_control *lo = gphy->lo_control;
 400         u16 tmp;
 401
 402         if (b43_has_hardware_pctl(dev)) {
 403                 sav->phy_lo_mask = b43_phy_read(dev, B43_PHY_LO_MASK);
 404                 sav->phy_extg_01 = b43_phy_read(dev, B43_PHY_EXTG(0x01));
 405                 sav->phy_dacctl_hwpctl = b43_phy_read(dev, B43_PHY_DACCTL);
 406                 sav->phy_cck_14 = b43_phy_read(dev, B43_PHY_CCK(0x14));
 407                 sav->phy_hpwr_tssictl = b43_phy_read(dev, B43_PHY_HPWR_TSSICTL);
 408
 409                 b43_phy_write(dev, B43_PHY_HPWR_TSSICTL,
 410                               b43_phy_read(dev, B43_PHY_HPWR_TSSICTL)
 411                               | 0x100);
 412                 b43_phy_write(dev, B43_PHY_EXTG(0x01),
 413                               b43_phy_read(dev, B43_PHY_EXTG(0x01))
 414                               | 0x40);
 415                 b43_phy_write(dev, B43_PHY_DACCTL,
 416                               b43_phy_read(dev, B43_PHY_DACCTL)
 417                               | 0x40);
 418                 b43_phy_write(dev, B43_PHY_CCK(0x14),
 419                               b43_phy_read(dev, B43_PHY_CCK(0x14))
 420                               | 0x200);
 421         }
 422         if (phy->type == B43_PHYTYPE_B &&
 423             phy->radio_ver == 0x2050 && phy->radio_rev < 6) {
 424                 b43_phy_write(dev, B43_PHY_CCK(0x16), 0x410);
 425                 b43_phy_write(dev, B43_PHY_CCK(0x17), 0x820);
 426         }
 427         if (phy->rev >= 2) {
 428                 sav->phy_analogover = b43_phy_read(dev, B43_PHY_ANALOGOVER);
 429                 sav->phy_analogoverval =
 430                     b43_phy_read(dev, B43_PHY_ANALOGOVERVAL);
 431                 sav->phy_rfover = b43_phy_read(dev, B43_PHY_RFOVER);
 432                 sav->phy_rfoverval = b43_phy_read(dev, B43_PHY_RFOVERVAL);
 433                 sav->phy_classctl = b43_phy_read(dev, B43_PHY_CLASSCTL);
 434                 sav->phy_cck_3E = b43_phy_read(dev, B43_PHY_CCK(0x3E));
 435                 sav->phy_crs0 = b43_phy_read(dev, B43_PHY_CRS0);
 436
 437                 b43_phy_write(dev, B43_PHY_CLASSCTL,
 438                               b43_phy_read(dev, B43_PHY_CLASSCTL)
 439                               & 0xFFFC);
 440                 b43_phy_write(dev, B43_PHY_CRS0, b43_phy_read(dev, B43_PHY_CRS0)
 441                               & 0x7FFF);
 442                 b43_phy_write(dev, B43_PHY_ANALOGOVER,
 443                               b43_phy_read(dev, B43_PHY_ANALOGOVER)
 444                               | 0x0003);
 445                 b43_phy_write(dev, B43_PHY_ANALOGOVERVAL,
 446                               b43_phy_read(dev, B43_PHY_ANALOGOVERVAL)
 447                               & 0xFFFC);
 448                 if (phy->type == B43_PHYTYPE_G) {
 449                         if ((phy->rev >= 7) &&
 450                             (sprom->boardflags_lo & B43_BFL_EXTLNA)) {
 451                                 b43_phy_write(dev, B43_PHY_RFOVER, 0x933);
 452                         } else {
 453                                 b43_phy_write(dev, B43_PHY_RFOVER, 0x133);
 454                         }
 455                 } else {
 456                         b43_phy_write(dev, B43_PHY_RFOVER, 0);
 457                 }
 458                 b43_phy_write(dev, B43_PHY_CCK(0x3E), 0);
 459         }
 460         sav->reg_3F4 = b43_read16(dev, 0x3F4);
 461         sav->reg_3E2 = b43_read16(dev, 0x3E2);
 462         sav->radio_43 = b43_radio_read16(dev, 0x43);
 463         sav->radio_7A = b43_radio_read16(dev, 0x7A);
 464         sav->phy_pgactl = b43_phy_read(dev, B43_PHY_PGACTL);
 465         sav->phy_cck_2A = b43_phy_read(dev, B43_PHY_CCK(0x2A));
 466         sav->phy_syncctl = b43_phy_read(dev, B43_PHY_SYNCCTL);
 467         sav->phy_dacctl = b43_phy_read(dev, B43_PHY_DACCTL);
 468
 469         if (!has_tx_magnification(phy)) {
 470                 sav->radio_52 = b43_radio_read16(dev, 0x52);
 471                 sav->radio_52 &= 0x00F0;
 472         }
 473         if (phy->type == B43_PHYTYPE_B) {
 474                 sav->phy_cck_30 = b43_phy_read(dev, B43_PHY_CCK(0x30));
 475                 sav->phy_cck_06 = b43_phy_read(dev, B43_PHY_CCK(0x06));
 476                 b43_phy_write(dev, B43_PHY_CCK(0x30), 0x00FF);
 477                 b43_phy_write(dev, B43_PHY_CCK(0x06), 0x3F3F);
 478         } else {
 479                 b43_write16(dev, 0x3E2, b43_read16(dev, 0x3E2)
 480                             | 0x8000);
 481         }
 482         b43_write16(dev, 0x3F4, b43_read16(dev, 0x3F4)
 483                     & 0xF000);
 484
 485         tmp =
 486             (phy->type == B43_PHYTYPE_G) ? B43_PHY_LO_MASK : B43_PHY_CCK(0x2E);
 487         b43_phy_write(dev, tmp, 0x007F);
 488
 489         tmp = sav->phy_syncctl;
 490         b43_phy_write(dev, B43_PHY_SYNCCTL, tmp & 0xFF7F);
 491         tmp = sav->radio_7A;
 492         b43_radio_write16(dev, 0x007A, tmp & 0xFFF0);
 493
 494         b43_phy_write(dev, B43_PHY_CCK(0x2A), 0x8A3);
 495         if (phy->type == B43_PHYTYPE_G ||
 496             (phy->type == B43_PHYTYPE_B &&
 497              phy->radio_ver == 0x2050 && phy->radio_rev >= 6)) {
 498                 b43_phy_write(dev, B43_PHY_CCK(0x2B), 0x1003);
 499         } else
 500                 b43_phy_write(dev, B43_PHY_CCK(0x2B), 0x0802);
 501         if (phy->rev >= 2)
 502                 b43_dummy_transmission(dev);
 503         b43_gphy_channel_switch(dev, 6, 0);
 504         b43_radio_read16(dev, 0x51);    /* dummy read */
 505         if (phy->type == B43_PHYTYPE_G)
 506                 b43_phy_write(dev, B43_PHY_CCK(0x2F), 0);
 507
 508         /* Re-measure the txctl values, if needed. */
 509         if (time_before(lo->txctl_measured_time,
 510                         jiffies - B43_LO_TXCTL_EXPIRE))
 511                 lo_measure_txctl_values(dev);
 512
 513         if (phy->type == B43_PHYTYPE_G && phy->rev >= 3) {
 514                 b43_phy_write(dev, B43_PHY_LO_MASK, 0xC078);
 515         } else {
 516                 if (phy->type == B43_PHYTYPE_B)
 517                         b43_phy_write(dev, B43_PHY_CCK(0x2E), 0x8078);
 518                 else
 519                         b43_phy_write(dev, B43_PHY_LO_MASK, 0x8078);
 520         }
 521 }
 522
 523 static void lo_measure_restore(struct b43_wldev *dev,
 524                                struct lo_g_saved_values *sav)
 525 {
 526         struct b43_phy *phy = &dev->phy;
 527         struct b43_phy_g *gphy = phy->g;
 528         u16 tmp;
 529
 530         if (phy->rev >= 2) {
 531                 b43_phy_write(dev, B43_PHY_PGACTL, 0xE300);
 532                 tmp = (gphy->pga_gain << 8);
 533                 b43_phy_write(dev, B43_PHY_RFOVERVAL, tmp | 0xA0);
 534                 udelay(5);
 535                 b43_phy_write(dev, B43_PHY_RFOVERVAL, tmp | 0xA2);
 536                 udelay(2);
 537                 b43_phy_write(dev, B43_PHY_RFOVERVAL, tmp | 0xA3);
 538         } else {
 539                 tmp = (gphy->pga_gain | 0xEFA0);
 540                 b43_phy_write(dev, B43_PHY_PGACTL, tmp);
 541         }
 542         if (phy->type == B43_PHYTYPE_G) {
 543                 if (phy->rev >= 3)
 544                         b43_phy_write(dev, B43_PHY_CCK(0x2E), 0xC078);
 545                 else
 546                         b43_phy_write(dev, B43_PHY_CCK(0x2E), 0x8078);
 547                 if (phy->rev >= 2)
 548                         b43_phy_write(dev, B43_PHY_CCK(0x2F), 0x0202);
 549                 else
 550                         b43_phy_write(dev, B43_PHY_CCK(0x2F), 0x0101);
 551         }
 552         b43_write16(dev, 0x3F4, sav->reg_3F4);
 553         b43_phy_write(dev, B43_PHY_PGACTL, sav->phy_pgactl);
 554         b43_phy_write(dev, B43_PHY_CCK(0x2A), sav->phy_cck_2A);
 555         b43_phy_write(dev, B43_PHY_SYNCCTL, sav->phy_syncctl);
 556         b43_phy_write(dev, B43_PHY_DACCTL, sav->phy_dacctl);
 557         b43_radio_write16(dev, 0x43, sav->radio_43);
 558         b43_radio_write16(dev, 0x7A, sav->radio_7A);
 559         if (!has_tx_magnification(phy)) {
 560                 tmp = sav->radio_52;
 561                 b43_radio_write16(dev, 0x52, (b43_radio_read16(dev, 0x52)
 562                                               & 0xFF0F) | tmp);
 563         }
 564         b43_write16(dev, 0x3E2, sav->reg_3E2);
 565         if (phy->type == B43_PHYTYPE_B &&
 566             phy->radio_ver == 0x2050 && phy->radio_rev <= 5) {
 567                 b43_phy_write(dev, B43_PHY_CCK(0x30), sav->phy_cck_30);
 568                 b43_phy_write(dev, B43_PHY_CCK(0x06), sav->phy_cck_06);
 569         }
 570         if (phy->rev >= 2) {
 571                 b43_phy_write(dev, B43_PHY_ANALOGOVER, sav->phy_analogover);
 572                 b43_phy_write(dev, B43_PHY_ANALOGOVERVAL,
 573                               sav->phy_analogoverval);
 574                 b43_phy_write(dev, B43_PHY_CLASSCTL, sav->phy_classctl);
 575                 b43_phy_write(dev, B43_PHY_RFOVER, sav->phy_rfover);
 576                 b43_phy_write(dev, B43_PHY_RFOVERVAL, sav->phy_rfoverval);
 577                 b43_phy_write(dev, B43_PHY_CCK(0x3E), sav->phy_cck_3E);
 578                 b43_phy_write(dev, B43_PHY_CRS0, sav->phy_crs0);
 579         }
 580         if (b43_has_hardware_pctl(dev)) {
 581                 tmp = (sav->phy_lo_mask & 0xBFFF);
 582                 b43_phy_write(dev, B43_PHY_LO_MASK, tmp);
 583                 b43_phy_write(dev, B43_PHY_EXTG(0x01), sav->phy_extg_01);
 584                 b43_phy_write(dev, B43_PHY_DACCTL, sav->phy_dacctl_hwpctl);
 585                 b43_phy_write(dev, B43_PHY_CCK(0x14), sav->phy_cck_14);
 586                 b43_phy_write(dev, B43_PHY_HPWR_TSSICTL, sav->phy_hpwr_tssictl);
 587         }
 588         b43_gphy_channel_switch(dev, sav->old_channel, 1);
 589 }
 590
 591 struct b43_lo_g_statemachine {
 592         int current_state;
 593         int nr_measured;
 594         int state_val_multiplier;
 595         u16 lowest_feedth;
 596         struct b43_loctl min_loctl;
 597 };
 598
 599 /* Loop over each possible value in this state. */
 600 static int lo_probe_possible_loctls(struct b43_wldev *dev,
 601                                     struct b43_loctl *probe_loctl,
 602                                     struct b43_lo_g_statemachine *d)
 603 {
 604         struct b43_phy *phy = &dev->phy;
 605         struct b43_phy_g *gphy = phy->g;
 606         struct b43_loctl test_loctl;
 607         struct b43_loctl orig_loctl;
 608         struct b43_loctl prev_loctl = {
 609                 .i = -100,
 610                 .q = -100,
 611         };
 612         int i;
 613         int begin, end;
 614         int found_lower = 0;
 615         u16 feedth;
 616
 617         static const struct b43_loctl modifiers[] = {
 618                 {.i = 1,.q = 1,},
 619                 {.i = 1,.q = 0,},
 620                 {.i = 1,.q = -1,},
 621                 {.i = 0,.q = -1,},
 622                 {.i = -1,.q = -1,},
 623                 {.i = -1,.q = 0,},
 624                 {.i = -1,.q = 1,},
 625                 {.i = 0,.q = 1,},
 626         };
 627
 628         if (d->current_state == 0) {
 629                 begin = 1;
 630                 end = 8;
 631         } else if (d->current_state % 2 == 0) {
 632                 begin = d->current_state - 1;
 633                 end = d->current_state + 1;
 634         } else {
 635                 begin = d->current_state - 2;
 636                 end = d->current_state + 2;
 637         }
 638         if (begin < 1)
 639                 begin += 8;
 640         if (end > 8)
 641                 end -= 8;
 642
 643         memcpy(&orig_loctl, probe_loctl, sizeof(struct b43_loctl));
 644         i = begin;
 645         d->current_state = i;
 646         while (1) {
 647                 B43_WARN_ON(!(i >= 1 && i <= 8));
 648                 memcpy(&test_loctl, &orig_loctl, sizeof(struct b43_loctl));
 649                 test_loctl.i += modifiers[i - 1].i * d->state_val_multiplier;
 650                 test_loctl.q += modifiers[i - 1].q * d->state_val_multiplier;
 651                 if ((test_loctl.i != prev_loctl.i ||
 652                      test_loctl.q != prev_loctl.q) &&
 653                     (abs(test_loctl.i) <= 16 && abs(test_loctl.q) <= 16)) {
 654                         b43_lo_write(dev, &test_loctl);
 655                         feedth = lo_measure_feedthrough(dev, gphy->lna_gain,
 656                                                         gphy->pga_gain,
 657                                                         gphy->trsw_rx_gain);
 658                         if (feedth < d->lowest_feedth) {
 659                                 memcpy(probe_loctl, &test_loctl,
 660                                        sizeof(struct b43_loctl));
 661                                 found_lower = 1;
 662                                 d->lowest_feedth = feedth;
 663                                 if ((d->nr_measured < 2) &&
 664                                     !has_loopback_gain(phy))
 665                                         break;
 666                         }
 667                 }
 668                 memcpy(&prev_loctl, &test_loctl, sizeof(prev_loctl));
 669                 if (i == end)
 670                         break;
 671                 if (i == 8)
 672                         i = 1;
 673                 else
 674                         i++;
 675                 d->current_state = i;
 676         }
 677
 678         return found_lower;
 679 }
 680
 681 static void lo_probe_loctls_statemachine(struct b43_wldev *dev,
 682                                          struct b43_loctl *loctl,
 683                                          int *max_rx_gain)
 684 {
 685         struct b43_phy *phy = &dev->phy;
 686         struct b43_phy_g *gphy = phy->g;
 687         struct b43_lo_g_statemachine d;
 688         u16 feedth;
 689         int found_lower;
 690         struct b43_loctl probe_loctl;
 691         int max_repeat = 1, repeat_cnt = 0;
 692
 693         d.nr_measured = 0;
 694         d.state_val_multiplier = 1;
 695         if (has_loopback_gain(phy))
 696                 d.state_val_multiplier = 3;
 697
 698         memcpy(&d.min_loctl, loctl, sizeof(struct b43_loctl));
 699         if (has_loopback_gain(phy))
 700                 max_repeat = 4;
 701         do {
 702                 b43_lo_write(dev, &d.min_loctl);
 703                 feedth = lo_measure_feedthrough(dev, gphy->lna_gain,
 704                                                 gphy->pga_gain,
 705                                                 gphy->trsw_rx_gain);
 706                 if (feedth < 0x258) {
 707                         if (feedth >= 0x12C)
 708                                 *max_rx_gain += 6;
 709                         else
 710                                 *max_rx_gain += 3;
 711                         feedth = lo_measure_feedthrough(dev, gphy->lna_gain,
 712                                                         gphy->pga_gain,
 713                                                         gphy->trsw_rx_gain);
 714                 }
 715                 d.lowest_feedth = feedth;
 716
 717                 d.current_state = 0;
 718                 do {
 719                         B43_WARN_ON(!
 720                                     (d.current_state >= 0
 721                                      && d.current_state <= 8));
 722                         memcpy(&probe_loctl, &d.min_loctl,
 723                                sizeof(struct b43_loctl));
 724                         found_lower =
 725                             lo_probe_possible_loctls(dev, &probe_loctl, &d);
 726                         if (!found_lower)
 727                                 break;
 728                         if ((probe_loctl.i == d.min_loctl.i) &&
 729                             (probe_loctl.q == d.min_loctl.q))
 730                                 break;
 731                         memcpy(&d.min_loctl, &probe_loctl,
 732                                sizeof(struct b43_loctl));
 733                         d.nr_measured++;
 734                 } while (d.nr_measured < 24);
 735                 memcpy(loctl, &d.min_loctl, sizeof(struct b43_loctl));
 736
 737                 if (has_loopback_gain(phy)) {
 738                         if (d.lowest_feedth > 0x1194)
 739                                 *max_rx_gain -= 6;
 740                         else if (d.lowest_feedth < 0x5DC)
 741                                 *max_rx_gain += 3;
 742                         if (repeat_cnt == 0) {
 743                                 if (d.lowest_feedth <= 0x5DC) {
 744                                         d.state_val_multiplier = 1;
 745                                         repeat_cnt++;
 746                                 } else
 747                                         d.state_val_multiplier = 2;
 748                         } else if (repeat_cnt == 2)
 749                                 d.state_val_multiplier = 1;
 750                 }
 751                 lo_measure_gain_values(dev, *max_rx_gain,
 752                                        has_loopback_gain(phy));
 753         } while (++repeat_cnt < max_repeat);
 754 }
 755
 756 static
 757 struct b43_lo_calib * b43_calibrate_lo_setting(struct b43_wldev *dev,
 758                                                const struct b43_bbatt *bbatt,
 759                                                const struct b43_rfatt *rfatt)
 760 {
 761         struct b43_phy *phy = &dev->phy;
 762         struct b43_phy_g *gphy = phy->g;
 763         struct b43_loctl loctl = {
 764                 .i = 0,
 765                 .q = 0,
 766         };
 767         int max_rx_gain;
 768         struct b43_lo_calib *cal;
 769         struct lo_g_saved_values uninitialized_var(saved_regs);
 770         /* Values from the "TXCTL Register and Value Table" */
 771         u16 txctl_reg;
 772         u16 txctl_value;
 773         u16 pad_mix_gain;
 774
 775         saved_regs.old_channel = phy->channel;
 776         b43_mac_suspend(dev);
 777         lo_measure_setup(dev, &saved_regs);
 778
 779         txctl_reg = lo_txctl_register_table(dev, &txctl_value, &pad_mix_gain);
 780
 781         b43_radio_write16(dev, 0x43,
 782                           (b43_radio_read16(dev, 0x43) & 0xFFF0)
 783                           | rfatt->att);
 784         b43_radio_write16(dev, txctl_reg,
 785                           (b43_radio_read16(dev, txctl_reg) & ~txctl_value)
 786                           | (rfatt->with_padmix ? txctl_value : 0));
 787
 788         max_rx_gain = rfatt->att * 2;
 789         max_rx_gain += bbatt->att / 2;
 790         if (rfatt->with_padmix)
 791                 max_rx_gain -= pad_mix_gain;
 792         if (has_loopback_gain(phy))
 793                 max_rx_gain += gphy->max_lb_gain;
 794         lo_measure_gain_values(dev, max_rx_gain,
 795                                has_loopback_gain(phy));
 796
 797         b43_gphy_set_baseband_attenuation(dev, bbatt->att);
 798         lo_probe_loctls_statemachine(dev, &loctl, &max_rx_gain);
 799
 800         lo_measure_restore(dev, &saved_regs);
 801         b43_mac_enable(dev);
 802
 803         if (b43_debug(dev, B43_DBG_LO)) {
 804                 b43dbg(dev->wl, "LO: Calibrated for BB(%u), RF(%u,%u) "
 805                        "=> I=%d Q=%d\n",
 806                        bbatt->att, rfatt->att, rfatt->with_padmix,
 807                        loctl.i, loctl.q);
 808         }
 809
 810         cal = kmalloc(sizeof(*cal), GFP_KERNEL);
 811         if (!cal) {
 812                 b43warn(dev->wl, "LO calib: out of memory\n");
 813                 return NULL;
 814         }
 815         memcpy(&cal->bbatt, bbatt, sizeof(*bbatt));
 816         memcpy(&cal->rfatt, rfatt, sizeof(*rfatt));
 817         memcpy(&cal->ctl, &loctl, sizeof(loctl));
 818         cal->calib_time = jiffies;
 819         INIT_LIST_HEAD(&cal->list);
 820
 821         return cal;
 822 }
 823
 824 /* Get a calibrated LO setting for the given attenuation values.
 825  * Might return a NULL pointer under OOM! */
 826 static
 827 struct b43_lo_calib * b43_get_calib_lo_settings(struct b43_wldev *dev,
 828                                                 const struct b43_bbatt *bbatt,
 829                                                 const struct b43_rfatt *rfatt)
 830 {
 831         struct b43_txpower_lo_control *lo = dev->phy.g->lo_control;
 832         struct b43_lo_calib *c;
 833
 834         c = b43_find_lo_calib(lo, bbatt, rfatt);
 835         if (c)
 836                 return c;
 837         /* Not in the list of calibrated LO settings.
 838          * Calibrate it now. */
 839         c = b43_calibrate_lo_setting(dev, bbatt, rfatt);
 840         if (!c)
 841                 return NULL;
 842         list_add(&c->list, &lo->calib_list);
 843
 844         return c;
 845 }
 846
 847 void b43_gphy_dc_lt_init(struct b43_wldev *dev, bool update_all)
 848 {
 849         struct b43_phy *phy = &dev->phy;
 850         struct b43_phy_g *gphy = phy->g;
 851         struct b43_txpower_lo_control *lo = gphy->lo_control;
 852         int i;
 853         int rf_offset, bb_offset;
 854         const struct b43_rfatt *rfatt;
 855         const struct b43_bbatt *bbatt;
 856         u64 power_vector;
 857         bool table_changed = 0;
 858
 859         BUILD_BUG_ON(B43_DC_LT_SIZE != 32);
 860         B43_WARN_ON(lo->rfatt_list.len * lo->bbatt_list.len > 64);
 861
 862         power_vector = lo->power_vector;
 863         if (!update_all && !power_vector)
 864                 return; /* Nothing to do. */
 865
 866         /* Suspend the MAC now to avoid continuous suspend/enable
 867          * cycles in the loop. */
 868         b43_mac_suspend(dev);
 869
 870         for (i = 0; i < B43_DC_LT_SIZE * 2; i++) {
 871                 struct b43_lo_calib *cal;
 872                 int idx;
 873                 u16 val;
 874
 875                 if (!update_all && !(power_vector & (((u64)1ULL) << i)))
 876                         continue;
 877                 /* Update the table entry for this power_vector bit.
 878                  * The table rows are RFatt entries and columns are BBatt. */
 879                 bb_offset = i / lo->rfatt_list.len;
 880                 rf_offset = i % lo->rfatt_list.len;
 881                 bbatt = &(lo->bbatt_list.list[bb_offset]);
 882                 rfatt = &(lo->rfatt_list.list[rf_offset]);
 883
 884                 cal = b43_calibrate_lo_setting(dev, bbatt, rfatt);
 885                 if (!cal) {
 886                         b43warn(dev->wl, "LO: Could not "
 887                                 "calibrate DC table entry\n");
 888                         continue;
 889                 }
 890                 /*FIXME: Is Q really in the low nibble? */
 891                 val = (u8)(cal->ctl.q);
 892                 val |= ((u8)(cal->ctl.i)) << 4;
 893                 kfree(cal);
 894
 895                 /* Get the index into the hardware DC LT. */
 896                 idx = i / 2;
 897                 /* Change the table in memory. */
 898                 if (i % 2) {
 899                         /* Change the high byte. */
 900                         lo->dc_lt[idx] = (lo->dc_lt[idx] & 0x00FF)
 901                                          | ((val & 0x00FF) << 8);
 902                 } else {
 903                         /* Change the low byte. */
 904                         lo->dc_lt[idx] = (lo->dc_lt[idx] & 0xFF00)
 905                                          | (val & 0x00FF);
 906                 }
 907                 table_changed = 1;
 908         }
 909         if (table_changed) {
 910                 /* The table changed in memory. Update the hardware table. */
 911                 for (i = 0; i < B43_DC_LT_SIZE; i++)
 912                         b43_phy_write(dev, 0x3A0 + i, lo->dc_lt[i]);
 913         }
 914         b43_mac_enable(dev);
 915 }
 916
 917 /* Fixup the RF attenuation value for the case where we are
 918  * using the PAD mixer. */
 919 static inline void b43_lo_fixup_rfatt(struct b43_rfatt *rf)
 920 {
 921         if (!rf->with_padmix)
 922                 return;
 923         if ((rf->att != 1) && (rf->att != 2) && (rf->att != 3))
 924                 rf->att = 4;
 925 }
 926
 927 void b43_lo_g_adjust(struct b43_wldev *dev)
 928 {
 929         struct b43_phy_g *gphy = dev->phy.g;
 930         struct b43_lo_calib *cal;
 931         struct b43_rfatt rf;
 932
 933         memcpy(&rf, &gphy->rfatt, sizeof(rf));
 934         b43_lo_fixup_rfatt(&rf);
 935
 936         cal = b43_get_calib_lo_settings(dev, &gphy->bbatt, &rf);
 937         if (!cal)
 938                 return;
 939         b43_lo_write(dev, &cal->ctl);
 940 }
 941
 942 void b43_lo_g_adjust_to(struct b43_wldev *dev,
 943                         u16 rfatt, u16 bbatt, u16 tx_control)
 944 {
 945         struct b43_rfatt rf;
 946         struct b43_bbatt bb;
 947         struct b43_lo_calib *cal;
 948
 949         memset(&rf, 0, sizeof(rf));
 950         memset(&bb, 0, sizeof(bb));
 951         rf.att = rfatt;
 952         bb.att = bbatt;
 953         b43_lo_fixup_rfatt(&rf);
 954         cal = b43_get_calib_lo_settings(dev, &bb, &rf);
 955         if (!cal)
 956                 return;
 957         b43_lo_write(dev, &cal->ctl);
 958 }
 959
 960 /* Periodic LO maintanance work */
 961 void b43_lo_g_maintanance_work(struct b43_wldev *dev)
 962 {
 963         struct b43_phy *phy = &dev->phy;
 964         struct b43_phy_g *gphy = phy->g;
 965         struct b43_txpower_lo_control *lo = gphy->lo_control;
 966         unsigned long now;
 967         unsigned long expire;
 968         struct b43_lo_calib *cal, *tmp;
 969         bool current_item_expired = 0;
 970         bool hwpctl;
 971
 972         if (!lo)
 973                 return;
 974         now = jiffies;
 975         hwpctl = b43_has_hardware_pctl(dev);
 976
 977         if (hwpctl) {
 978                 /* Read the power vector and update it, if needed. */
 979                 expire = now - B43_LO_PWRVEC_EXPIRE;
 980                 if (time_before(lo->pwr_vec_read_time, expire)) {
 981                         lo_read_power_vector(dev);
 982                         b43_gphy_dc_lt_init(dev, 0);
 983                 }
 984                 //FIXME Recalc the whole DC table from time to time?
 985         }
 986
 987         if (hwpctl)
 988                 return;
 989         /* Search for expired LO settings. Remove them.
 990          * Recalibrate the current setting, if expired. */
 991         expire = now - B43_LO_CALIB_EXPIRE;
 992         list_for_each_entry_safe(cal, tmp, &lo->calib_list, list) {
 993                 if (!time_before(cal->calib_time, expire))
 994                         continue;
 995                 /* This item expired. */
 996                 if (b43_compare_bbatt(&cal->bbatt, &gphy->bbatt) &&
 997                     b43_compare_rfatt(&cal->rfatt, &gphy->rfatt)) {
 998                         B43_WARN_ON(current_item_expired);
 999                         current_item_expired = 1;
1000                 }
1001                 if (b43_debug(dev, B43_DBG_LO)) {
1002                         b43dbg(dev->wl, "LO: Item BB(%u), RF(%u,%u), "
1003                                "I=%d, Q=%d expired\n",
1004                                cal->bbatt.att, cal->rfatt.att,
1005                                cal->rfatt.with_padmix,
1006                                cal->ctl.i, cal->ctl.q);
1007                 }
1008                 list_del(&cal->list);
1009                 kfree(cal);
1010         }
1011         if (current_item_expired || unlikely(list_empty(&lo->calib_list))) {
1012                 /* Recalibrate currently used LO setting. */
1013                 if (b43_debug(dev, B43_DBG_LO))
1014                         b43dbg(dev->wl, "LO: Recalibrating current LO setting\n");
1015                 cal = b43_calibrate_lo_setting(dev, &gphy->bbatt, &gphy->rfatt);
1016                 if (cal) {
1017                         list_add(&cal->list, &lo->calib_list);
1018                         b43_lo_write(dev, &cal->ctl);
1019                 } else
1020                         b43warn(dev->wl, "Failed to recalibrate current LO setting\n");
1021         }
1022 }
1023
1024 void b43_lo_g_cleanup(struct b43_wldev *dev)
1025 {
1026         struct b43_txpower_lo_control *lo = dev->phy.g->lo_control;
1027         struct b43_lo_calib *cal, *tmp;
1028
1029         if (!lo)
1030                 return;
1031         list_for_each_entry_safe(cal, tmp, &lo->calib_list, list) {
1032                 list_del(&cal->list);
1033                 kfree(cal);
1034         }
1035 }
1036
1037 /* LO Initialization */
1038 void b43_lo_g_init(struct b43_wldev *dev)
1039 {
1040         if (b43_has_hardware_pctl(dev)) {
1041                 lo_read_power_vector(dev);
1042                 b43_gphy_dc_lt_init(dev, 1);
1043         }
1044 }