SAFE public projects git trees. - safe/jmp/linux-2.6/blob - 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_mask(dev, reg, 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_mask(dev, 0x52, 0xFFF0);      /* TX bias == 0 */
 272         }
 273         lo->txctl_measured_time = jiffies;
 274 }
 275
 276 static void lo_read_power_vector(struct b43_wldev *dev)
 277 {
 278         struct b43_phy *phy = &dev->phy;
 279         struct b43_phy_g *gphy = phy->g;
 280         struct b43_txpower_lo_control *lo = gphy->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         struct b43_phy_g *gphy = phy->g;
 302         u16 tmp;
 303
 304         if (max_rx_gain < 0)
 305                 max_rx_gain = 0;
 306
 307         if (has_loopback_gain(phy)) {
 308                 int trsw_rx = 0;
 309                 int trsw_rx_gain;
 310
 311                 if (use_trsw_rx) {
 312                         trsw_rx_gain = gphy->trsw_rx_gain / 2;
 313                         if (max_rx_gain >= trsw_rx_gain) {
 314                                 trsw_rx_gain = max_rx_gain - trsw_rx_gain;
 315                                 trsw_rx = 0x20;
 316                         }
 317                 } else
 318                         trsw_rx_gain = max_rx_gain;
 319                 if (trsw_rx_gain < 9) {
 320                         gphy->lna_lod_gain = 0;
 321                 } else {
 322                         gphy->lna_lod_gain = 1;
 323                         trsw_rx_gain -= 8;
 324                 }
 325                 trsw_rx_gain = clamp_val(trsw_rx_gain, 0, 0x2D);
 326                 gphy->pga_gain = trsw_rx_gain / 3;
 327                 if (gphy->pga_gain >= 5) {
 328                         gphy->pga_gain -= 5;
 329                         gphy->lna_gain = 2;
 330                 } else
 331                         gphy->lna_gain = 0;
 332         } else {
 333                 gphy->lna_gain = 0;
 334                 gphy->trsw_rx_gain = 0x20;
 335                 if (max_rx_gain >= 0x14) {
 336                         gphy->lna_lod_gain = 1;
 337                         gphy->pga_gain = 2;
 338                 } else if (max_rx_gain >= 0x12) {
 339                         gphy->lna_lod_gain = 1;
 340                         gphy->pga_gain = 1;
 341                 } else if (max_rx_gain >= 0xF) {
 342                         gphy->lna_lod_gain = 1;
 343                         gphy->pga_gain = 0;
 344                 } else {
 345                         gphy->lna_lod_gain = 0;
 346                         gphy->pga_gain = 0;
 347                 }
 348         }
 349
 350         tmp = b43_radio_read16(dev, 0x7A);
 351         if (gphy->lna_lod_gain == 0)
 352                 tmp &= ~0x0008;
 353         else
 354                 tmp |= 0x0008;
 355         b43_radio_write16(dev, 0x7A, tmp);
 356 }
 357
 358 struct lo_g_saved_values {
 359         u8 old_channel;
 360
 361         /* Core registers */
 362         u16 reg_3F4;
 363         u16 reg_3E2;
 364
 365         /* PHY registers */
 366         u16 phy_lo_mask;
 367         u16 phy_extg_01;
 368         u16 phy_dacctl_hwpctl;
 369         u16 phy_dacctl;
 370         u16 phy_cck_14;
 371         u16 phy_hpwr_tssictl;
 372         u16 phy_analogover;
 373         u16 phy_analogoverval;
 374         u16 phy_rfover;
 375         u16 phy_rfoverval;
 376         u16 phy_classctl;
 377         u16 phy_cck_3E;
 378         u16 phy_crs0;
 379         u16 phy_pgactl;
 380         u16 phy_cck_2A;
 381         u16 phy_syncctl;
 382         u16 phy_cck_30;
 383         u16 phy_cck_06;
 384
 385         /* Radio registers */
 386         u16 radio_43;
 387         u16 radio_7A;
 388         u16 radio_52;
 389 };
 390
 391 static void lo_measure_setup(struct b43_wldev *dev,
 392                              struct lo_g_saved_values *sav)
 393 {
 394         struct ssb_sprom *sprom = &dev->dev->bus->sprom;
 395         struct b43_phy *phy = &dev->phy;
 396         struct b43_phy_g *gphy = phy->g;
 397         struct b43_txpower_lo_control *lo = gphy->lo_control;
 398         u16 tmp;
 399
 400         if (b43_has_hardware_pctl(dev)) {
 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_set(dev, B43_PHY_HPWR_TSSICTL, 0x100);
 408                 b43_phy_set(dev, B43_PHY_EXTG(0x01), 0x40);
 409                 b43_phy_set(dev, B43_PHY_DACCTL, 0x40);
 410                 b43_phy_set(dev, B43_PHY_CCK(0x14), 0x200);
 411         }
 412         if (phy->type == B43_PHYTYPE_B &&
 413             phy->radio_ver == 0x2050 && phy->radio_rev < 6) {
 414                 b43_phy_write(dev, B43_PHY_CCK(0x16), 0x410);
 415                 b43_phy_write(dev, B43_PHY_CCK(0x17), 0x820);
 416         }
 417         if (phy->rev >= 2) {
 418                 sav->phy_analogover = b43_phy_read(dev, B43_PHY_ANALOGOVER);
 419                 sav->phy_analogoverval =
 420                     b43_phy_read(dev, B43_PHY_ANALOGOVERVAL);
 421                 sav->phy_rfover = b43_phy_read(dev, B43_PHY_RFOVER);
 422                 sav->phy_rfoverval = b43_phy_read(dev, B43_PHY_RFOVERVAL);
 423                 sav->phy_classctl = b43_phy_read(dev, B43_PHY_CLASSCTL);
 424                 sav->phy_cck_3E = b43_phy_read(dev, B43_PHY_CCK(0x3E));
 425                 sav->phy_crs0 = b43_phy_read(dev, B43_PHY_CRS0);
 426
 427                 b43_phy_mask(dev, B43_PHY_CLASSCTL, 0xFFFC);
 428                 b43_phy_mask(dev, B43_PHY_CRS0, 0x7FFF);
 429                 b43_phy_set(dev, B43_PHY_ANALOGOVER, 0x0003);
 430                 b43_phy_mask(dev, B43_PHY_ANALOGOVERVAL, 0xFFFC);
 431                 if (phy->type == B43_PHYTYPE_G) {
 432                         if ((phy->rev >= 7) &&
 433                             (sprom->boardflags_lo & B43_BFL_EXTLNA)) {
 434                                 b43_phy_write(dev, B43_PHY_RFOVER, 0x933);
 435                         } else {
 436                                 b43_phy_write(dev, B43_PHY_RFOVER, 0x133);
 437                         }
 438                 } else {
 439                         b43_phy_write(dev, B43_PHY_RFOVER, 0);
 440                 }
 441                 b43_phy_write(dev, B43_PHY_CCK(0x3E), 0);
 442         }
 443         sav->reg_3F4 = b43_read16(dev, 0x3F4);
 444         sav->reg_3E2 = b43_read16(dev, 0x3E2);
 445         sav->radio_43 = b43_radio_read16(dev, 0x43);
 446         sav->radio_7A = b43_radio_read16(dev, 0x7A);
 447         sav->phy_pgactl = b43_phy_read(dev, B43_PHY_PGACTL);
 448         sav->phy_cck_2A = b43_phy_read(dev, B43_PHY_CCK(0x2A));
 449         sav->phy_syncctl = b43_phy_read(dev, B43_PHY_SYNCCTL);
 450         sav->phy_dacctl = b43_phy_read(dev, B43_PHY_DACCTL);
 451
 452         if (!has_tx_magnification(phy)) {
 453                 sav->radio_52 = b43_radio_read16(dev, 0x52);
 454                 sav->radio_52 &= 0x00F0;
 455         }
 456         if (phy->type == B43_PHYTYPE_B) {
 457                 sav->phy_cck_30 = b43_phy_read(dev, B43_PHY_CCK(0x30));
 458                 sav->phy_cck_06 = b43_phy_read(dev, B43_PHY_CCK(0x06));
 459                 b43_phy_write(dev, B43_PHY_CCK(0x30), 0x00FF);
 460                 b43_phy_write(dev, B43_PHY_CCK(0x06), 0x3F3F);
 461         } else {
 462                 b43_write16(dev, 0x3E2, b43_read16(dev, 0x3E2)
 463                             | 0x8000);
 464         }
 465         b43_write16(dev, 0x3F4, b43_read16(dev, 0x3F4)
 466                     & 0xF000);
 467
 468         tmp =
 469             (phy->type == B43_PHYTYPE_G) ? B43_PHY_LO_MASK : B43_PHY_CCK(0x2E);
 470         b43_phy_write(dev, tmp, 0x007F);
 471
 472         tmp = sav->phy_syncctl;
 473         b43_phy_write(dev, B43_PHY_SYNCCTL, tmp & 0xFF7F);
 474         tmp = sav->radio_7A;
 475         b43_radio_write16(dev, 0x007A, tmp & 0xFFF0);
 476
 477         b43_phy_write(dev, B43_PHY_CCK(0x2A), 0x8A3);
 478         if (phy->type == B43_PHYTYPE_G ||
 479             (phy->type == B43_PHYTYPE_B &&
 480              phy->radio_ver == 0x2050 && phy->radio_rev >= 6)) {
 481                 b43_phy_write(dev, B43_PHY_CCK(0x2B), 0x1003);
 482         } else
 483                 b43_phy_write(dev, B43_PHY_CCK(0x2B), 0x0802);
 484         if (phy->rev >= 2)
 485                 b43_dummy_transmission(dev);
 486         b43_gphy_channel_switch(dev, 6, 0);
 487         b43_radio_read16(dev, 0x51);    /* dummy read */
 488         if (phy->type == B43_PHYTYPE_G)
 489                 b43_phy_write(dev, B43_PHY_CCK(0x2F), 0);
 490
 491         /* Re-measure the txctl values, if needed. */
 492         if (time_before(lo->txctl_measured_time,
 493                         jiffies - B43_LO_TXCTL_EXPIRE))
 494                 lo_measure_txctl_values(dev);
 495
 496         if (phy->type == B43_PHYTYPE_G && phy->rev >= 3) {
 497                 b43_phy_write(dev, B43_PHY_LO_MASK, 0xC078);
 498         } else {
 499                 if (phy->type == B43_PHYTYPE_B)
 500                         b43_phy_write(dev, B43_PHY_CCK(0x2E), 0x8078);
 501                 else
 502                         b43_phy_write(dev, B43_PHY_LO_MASK, 0x8078);
 503         }
 504 }
 505
 506 static void lo_measure_restore(struct b43_wldev *dev,
 507                                struct lo_g_saved_values *sav)
 508 {
 509         struct b43_phy *phy = &dev->phy;
 510         struct b43_phy_g *gphy = phy->g;
 511         u16 tmp;
 512
 513         if (phy->rev >= 2) {
 514                 b43_phy_write(dev, B43_PHY_PGACTL, 0xE300);
 515                 tmp = (gphy->pga_gain << 8);
 516                 b43_phy_write(dev, B43_PHY_RFOVERVAL, tmp | 0xA0);
 517                 udelay(5);
 518                 b43_phy_write(dev, B43_PHY_RFOVERVAL, tmp | 0xA2);
 519                 udelay(2);
 520                 b43_phy_write(dev, B43_PHY_RFOVERVAL, tmp | 0xA3);
 521         } else {
 522                 tmp = (gphy->pga_gain | 0xEFA0);
 523                 b43_phy_write(dev, B43_PHY_PGACTL, tmp);
 524         }
 525         if (phy->type == B43_PHYTYPE_G) {
 526                 if (phy->rev >= 3)
 527                         b43_phy_write(dev, B43_PHY_CCK(0x2E), 0xC078);
 528                 else
 529                         b43_phy_write(dev, B43_PHY_CCK(0x2E), 0x8078);
 530                 if (phy->rev >= 2)
 531                         b43_phy_write(dev, B43_PHY_CCK(0x2F), 0x0202);
 532                 else
 533                         b43_phy_write(dev, B43_PHY_CCK(0x2F), 0x0101);
 534         }
 535         b43_write16(dev, 0x3F4, sav->reg_3F4);
 536         b43_phy_write(dev, B43_PHY_PGACTL, sav->phy_pgactl);
 537         b43_phy_write(dev, B43_PHY_CCK(0x2A), sav->phy_cck_2A);
 538         b43_phy_write(dev, B43_PHY_SYNCCTL, sav->phy_syncctl);
 539         b43_phy_write(dev, B43_PHY_DACCTL, sav->phy_dacctl);
 540         b43_radio_write16(dev, 0x43, sav->radio_43);
 541         b43_radio_write16(dev, 0x7A, sav->radio_7A);
 542         if (!has_tx_magnification(phy)) {
 543                 tmp = sav->radio_52;
 544                 b43_radio_write16(dev, 0x52, (b43_radio_read16(dev, 0x52)
 545                                               & 0xFF0F) | tmp);
 546         }
 547         b43_write16(dev, 0x3E2, sav->reg_3E2);
 548         if (phy->type == B43_PHYTYPE_B &&
 549             phy->radio_ver == 0x2050 && phy->radio_rev <= 5) {
 550                 b43_phy_write(dev, B43_PHY_CCK(0x30), sav->phy_cck_30);
 551                 b43_phy_write(dev, B43_PHY_CCK(0x06), sav->phy_cck_06);
 552         }
 553         if (phy->rev >= 2) {
 554                 b43_phy_write(dev, B43_PHY_ANALOGOVER, sav->phy_analogover);
 555                 b43_phy_write(dev, B43_PHY_ANALOGOVERVAL,
 556                               sav->phy_analogoverval);
 557                 b43_phy_write(dev, B43_PHY_CLASSCTL, sav->phy_classctl);
 558                 b43_phy_write(dev, B43_PHY_RFOVER, sav->phy_rfover);
 559                 b43_phy_write(dev, B43_PHY_RFOVERVAL, sav->phy_rfoverval);
 560                 b43_phy_write(dev, B43_PHY_CCK(0x3E), sav->phy_cck_3E);
 561                 b43_phy_write(dev, B43_PHY_CRS0, sav->phy_crs0);
 562         }
 563         if (b43_has_hardware_pctl(dev)) {
 564                 tmp = (sav->phy_lo_mask & 0xBFFF);
 565                 b43_phy_write(dev, B43_PHY_LO_MASK, tmp);
 566                 b43_phy_write(dev, B43_PHY_EXTG(0x01), sav->phy_extg_01);
 567                 b43_phy_write(dev, B43_PHY_DACCTL, sav->phy_dacctl_hwpctl);
 568                 b43_phy_write(dev, B43_PHY_CCK(0x14), sav->phy_cck_14);
 569                 b43_phy_write(dev, B43_PHY_HPWR_TSSICTL, sav->phy_hpwr_tssictl);
 570         }
 571         b43_gphy_channel_switch(dev, sav->old_channel, 1);
 572 }
 573
 574 struct b43_lo_g_statemachine {
 575         int current_state;
 576         int nr_measured;
 577         int state_val_multiplier;
 578         u16 lowest_feedth;
 579         struct b43_loctl min_loctl;
 580 };
 581
 582 /* Loop over each possible value in this state. */
 583 static int lo_probe_possible_loctls(struct b43_wldev *dev,
 584                                     struct b43_loctl *probe_loctl,
 585                                     struct b43_lo_g_statemachine *d)
 586 {
 587         struct b43_phy *phy = &dev->phy;
 588         struct b43_phy_g *gphy = phy->g;
 589         struct b43_loctl test_loctl;
 590         struct b43_loctl orig_loctl;
 591         struct b43_loctl prev_loctl = {
 592                 .i = -100,
 593                 .q = -100,
 594         };
 595         int i;
 596         int begin, end;
 597         int found_lower = 0;
 598         u16 feedth;
 599
 600         static const struct b43_loctl modifiers[] = {
 601                 {.i = 1,.q = 1,},
 602                 {.i = 1,.q = 0,},
 603                 {.i = 1,.q = -1,},
 604                 {.i = 0,.q = -1,},
 605                 {.i = -1,.q = -1,},
 606                 {.i = -1,.q = 0,},
 607                 {.i = -1,.q = 1,},
 608                 {.i = 0,.q = 1,},
 609         };
 610
 611         if (d->current_state == 0) {
 612                 begin = 1;
 613                 end = 8;
 614         } else if (d->current_state % 2 == 0) {
 615                 begin = d->current_state - 1;
 616                 end = d->current_state + 1;
 617         } else {
 618                 begin = d->current_state - 2;
 619                 end = d->current_state + 2;
 620         }
 621         if (begin < 1)
 622                 begin += 8;
 623         if (end > 8)
 624                 end -= 8;
 625
 626         memcpy(&orig_loctl, probe_loctl, sizeof(struct b43_loctl));
 627         i = begin;
 628         d->current_state = i;
 629         while (1) {
 630                 B43_WARN_ON(!(i >= 1 && i <= 8));
 631                 memcpy(&test_loctl, &orig_loctl, sizeof(struct b43_loctl));
 632                 test_loctl.i += modifiers[i - 1].i * d->state_val_multiplier;
 633                 test_loctl.q += modifiers[i - 1].q * d->state_val_multiplier;
 634                 if ((test_loctl.i != prev_loctl.i ||
 635                      test_loctl.q != prev_loctl.q) &&
 636                     (abs(test_loctl.i) <= 16 && abs(test_loctl.q) <= 16)) {
 637                         b43_lo_write(dev, &test_loctl);
 638                         feedth = lo_measure_feedthrough(dev, gphy->lna_gain,
 639                                                         gphy->pga_gain,
 640                                                         gphy->trsw_rx_gain);
 641                         if (feedth < d->lowest_feedth) {
 642                                 memcpy(probe_loctl, &test_loctl,
 643                                        sizeof(struct b43_loctl));
 644                                 found_lower = 1;
 645                                 d->lowest_feedth = feedth;
 646                                 if ((d->nr_measured < 2) &&
 647                                     !has_loopback_gain(phy))
 648                                         break;
 649                         }
 650                 }
 651                 memcpy(&prev_loctl, &test_loctl, sizeof(prev_loctl));
 652                 if (i == end)
 653                         break;
 654                 if (i == 8)
 655                         i = 1;
 656                 else
 657                         i++;
 658                 d->current_state = i;
 659         }
 660
 661         return found_lower;
 662 }
 663
 664 static void lo_probe_loctls_statemachine(struct b43_wldev *dev,
 665                                          struct b43_loctl *loctl,
 666                                          int *max_rx_gain)
 667 {
 668         struct b43_phy *phy = &dev->phy;
 669         struct b43_phy_g *gphy = phy->g;
 670         struct b43_lo_g_statemachine d;
 671         u16 feedth;
 672         int found_lower;
 673         struct b43_loctl probe_loctl;
 674         int max_repeat = 1, repeat_cnt = 0;
 675
 676         d.nr_measured = 0;
 677         d.state_val_multiplier = 1;
 678         if (has_loopback_gain(phy))
 679                 d.state_val_multiplier = 3;
 680
 681         memcpy(&d.min_loctl, loctl, sizeof(struct b43_loctl));
 682         if (has_loopback_gain(phy))
 683                 max_repeat = 4;
 684         do {
 685                 b43_lo_write(dev, &d.min_loctl);
 686                 feedth = lo_measure_feedthrough(dev, gphy->lna_gain,
 687                                                 gphy->pga_gain,
 688                                                 gphy->trsw_rx_gain);
 689                 if (feedth < 0x258) {
 690                         if (feedth >= 0x12C)
 691                                 *max_rx_gain += 6;
 692                         else
 693                                 *max_rx_gain += 3;
 694                         feedth = lo_measure_feedthrough(dev, gphy->lna_gain,
 695                                                         gphy->pga_gain,
 696                                                         gphy->trsw_rx_gain);
 697                 }
 698                 d.lowest_feedth = feedth;
 699
 700                 d.current_state = 0;
 701                 do {
 702                         B43_WARN_ON(!
 703                                     (d.current_state >= 0
 704                                      && d.current_state <= 8));
 705                         memcpy(&probe_loctl, &d.min_loctl,
 706                                sizeof(struct b43_loctl));
 707                         found_lower =
 708                             lo_probe_possible_loctls(dev, &probe_loctl, &d);
 709                         if (!found_lower)
 710                                 break;
 711                         if ((probe_loctl.i == d.min_loctl.i) &&
 712                             (probe_loctl.q == d.min_loctl.q))
 713                                 break;
 714                         memcpy(&d.min_loctl, &probe_loctl,
 715                                sizeof(struct b43_loctl));
 716                         d.nr_measured++;
 717                 } while (d.nr_measured < 24);
 718                 memcpy(loctl, &d.min_loctl, sizeof(struct b43_loctl));
 719
 720                 if (has_loopback_gain(phy)) {
 721                         if (d.lowest_feedth > 0x1194)
 722                                 *max_rx_gain -= 6;
 723                         else if (d.lowest_feedth < 0x5DC)
 724                                 *max_rx_gain += 3;
 725                         if (repeat_cnt == 0) {
 726                                 if (d.lowest_feedth <= 0x5DC) {
 727                                         d.state_val_multiplier = 1;
 728                                         repeat_cnt++;
 729                                 } else
 730                                         d.state_val_multiplier = 2;
 731                         } else if (repeat_cnt == 2)
 732                                 d.state_val_multiplier = 1;
 733                 }
 734                 lo_measure_gain_values(dev, *max_rx_gain,
 735                                        has_loopback_gain(phy));
 736         } while (++repeat_cnt < max_repeat);
 737 }
 738
 739 static
 740 struct b43_lo_calib * b43_calibrate_lo_setting(struct b43_wldev *dev,
 741                                                const struct b43_bbatt *bbatt,
 742                                                const struct b43_rfatt *rfatt)
 743 {
 744         struct b43_phy *phy = &dev->phy;
 745         struct b43_phy_g *gphy = phy->g;
 746         struct b43_loctl loctl = {
 747                 .i = 0,
 748                 .q = 0,
 749         };
 750         int max_rx_gain;
 751         struct b43_lo_calib *cal;
 752         struct lo_g_saved_values uninitialized_var(saved_regs);
 753         /* Values from the "TXCTL Register and Value Table" */
 754         u16 txctl_reg;
 755         u16 txctl_value;
 756         u16 pad_mix_gain;
 757
 758         saved_regs.old_channel = phy->channel;
 759         b43_mac_suspend(dev);
 760         lo_measure_setup(dev, &saved_regs);
 761
 762         txctl_reg = lo_txctl_register_table(dev, &txctl_value, &pad_mix_gain);
 763
 764         b43_radio_write16(dev, 0x43,
 765                           (b43_radio_read16(dev, 0x43) & 0xFFF0)
 766                           | rfatt->att);
 767         b43_radio_write16(dev, txctl_reg,
 768                           (b43_radio_read16(dev, txctl_reg) & ~txctl_value)
 769                           | (rfatt->with_padmix ? txctl_value : 0));
 770
 771         max_rx_gain = rfatt->att * 2;
 772         max_rx_gain += bbatt->att / 2;
 773         if (rfatt->with_padmix)
 774                 max_rx_gain -= pad_mix_gain;
 775         if (has_loopback_gain(phy))
 776                 max_rx_gain += gphy->max_lb_gain;
 777         lo_measure_gain_values(dev, max_rx_gain,
 778                                has_loopback_gain(phy));
 779
 780         b43_gphy_set_baseband_attenuation(dev, bbatt->att);
 781         lo_probe_loctls_statemachine(dev, &loctl, &max_rx_gain);
 782
 783         lo_measure_restore(dev, &saved_regs);
 784         b43_mac_enable(dev);
 785
 786         if (b43_debug(dev, B43_DBG_LO)) {
 787                 b43dbg(dev->wl, "LO: Calibrated for BB(%u), RF(%u,%u) "
 788                        "=> I=%d Q=%d\n",
 789                        bbatt->att, rfatt->att, rfatt->with_padmix,
 790                        loctl.i, loctl.q);
 791         }
 792
 793         cal = kmalloc(sizeof(*cal), GFP_KERNEL);
 794         if (!cal) {
 795                 b43warn(dev->wl, "LO calib: out of memory\n");
 796                 return NULL;
 797         }
 798         memcpy(&cal->bbatt, bbatt, sizeof(*bbatt));
 799         memcpy(&cal->rfatt, rfatt, sizeof(*rfatt));
 800         memcpy(&cal->ctl, &loctl, sizeof(loctl));
 801         cal->calib_time = jiffies;
 802         INIT_LIST_HEAD(&cal->list);
 803
 804         return cal;
 805 }
 806
 807 /* Get a calibrated LO setting for the given attenuation values.
 808  * Might return a NULL pointer under OOM! */
 809 static
 810 struct b43_lo_calib * b43_get_calib_lo_settings(struct b43_wldev *dev,
 811                                                 const struct b43_bbatt *bbatt,
 812                                                 const struct b43_rfatt *rfatt)
 813 {
 814         struct b43_txpower_lo_control *lo = dev->phy.g->lo_control;
 815         struct b43_lo_calib *c;
 816
 817         c = b43_find_lo_calib(lo, bbatt, rfatt);
 818         if (c)
 819                 return c;
 820         /* Not in the list of calibrated LO settings.
 821          * Calibrate it now. */
 822         c = b43_calibrate_lo_setting(dev, bbatt, rfatt);
 823         if (!c)
 824                 return NULL;
 825         list_add(&c->list, &lo->calib_list);
 826
 827         return c;
 828 }
 829
 830 void b43_gphy_dc_lt_init(struct b43_wldev *dev, bool update_all)
 831 {
 832         struct b43_phy *phy = &dev->phy;
 833         struct b43_phy_g *gphy = phy->g;
 834         struct b43_txpower_lo_control *lo = gphy->lo_control;
 835         int i;
 836         int rf_offset, bb_offset;
 837         const struct b43_rfatt *rfatt;
 838         const struct b43_bbatt *bbatt;
 839         u64 power_vector;
 840         bool table_changed = 0;
 841
 842         BUILD_BUG_ON(B43_DC_LT_SIZE != 32);
 843         B43_WARN_ON(lo->rfatt_list.len * lo->bbatt_list.len > 64);
 844
 845         power_vector = lo->power_vector;
 846         if (!update_all && !power_vector)
 847                 return; /* Nothing to do. */
 848
 849         /* Suspend the MAC now to avoid continuous suspend/enable
 850          * cycles in the loop. */
 851         b43_mac_suspend(dev);
 852
 853         for (i = 0; i < B43_DC_LT_SIZE * 2; i++) {
 854                 struct b43_lo_calib *cal;
 855                 int idx;
 856                 u16 val;
 857
 858                 if (!update_all && !(power_vector & (((u64)1ULL) << i)))
 859                         continue;
 860                 /* Update the table entry for this power_vector bit.
 861                  * The table rows are RFatt entries and columns are BBatt. */
 862                 bb_offset = i / lo->rfatt_list.len;
 863                 rf_offset = i % lo->rfatt_list.len;
 864                 bbatt = &(lo->bbatt_list.list[bb_offset]);
 865                 rfatt = &(lo->rfatt_list.list[rf_offset]);
 866
 867                 cal = b43_calibrate_lo_setting(dev, bbatt, rfatt);
 868                 if (!cal) {
 869                         b43warn(dev->wl, "LO: Could not "
 870                                 "calibrate DC table entry\n");
 871                         continue;
 872                 }
 873                 /*FIXME: Is Q really in the low nibble? */
 874                 val = (u8)(cal->ctl.q);
 875                 val |= ((u8)(cal->ctl.i)) << 4;
 876                 kfree(cal);
 877
 878                 /* Get the index into the hardware DC LT. */
 879                 idx = i / 2;
 880                 /* Change the table in memory. */
 881                 if (i % 2) {
 882                         /* Change the high byte. */
 883                         lo->dc_lt[idx] = (lo->dc_lt[idx] & 0x00FF)
 884                                          | ((val & 0x00FF) << 8);
 885                 } else {
 886                         /* Change the low byte. */
 887                         lo->dc_lt[idx] = (lo->dc_lt[idx] & 0xFF00)
 888                                          | (val & 0x00FF);
 889                 }
 890                 table_changed = 1;
 891         }
 892         if (table_changed) {
 893                 /* The table changed in memory. Update the hardware table. */
 894                 for (i = 0; i < B43_DC_LT_SIZE; i++)
 895                         b43_phy_write(dev, 0x3A0 + i, lo->dc_lt[i]);
 896         }
 897         b43_mac_enable(dev);
 898 }
 899
 900 /* Fixup the RF attenuation value for the case where we are
 901  * using the PAD mixer. */
 902 static inline void b43_lo_fixup_rfatt(struct b43_rfatt *rf)
 903 {
 904         if (!rf->with_padmix)
 905                 return;
 906         if ((rf->att != 1) && (rf->att != 2) && (rf->att != 3))
 907                 rf->att = 4;
 908 }
 909
 910 void b43_lo_g_adjust(struct b43_wldev *dev)
 911 {
 912         struct b43_phy_g *gphy = dev->phy.g;
 913         struct b43_lo_calib *cal;
 914         struct b43_rfatt rf;
 915
 916         memcpy(&rf, &gphy->rfatt, sizeof(rf));
 917         b43_lo_fixup_rfatt(&rf);
 918
 919         cal = b43_get_calib_lo_settings(dev, &gphy->bbatt, &rf);
 920         if (!cal)
 921                 return;
 922         b43_lo_write(dev, &cal->ctl);
 923 }
 924
 925 void b43_lo_g_adjust_to(struct b43_wldev *dev,
 926                         u16 rfatt, u16 bbatt, u16 tx_control)
 927 {
 928         struct b43_rfatt rf;
 929         struct b43_bbatt bb;
 930         struct b43_lo_calib *cal;
 931
 932         memset(&rf, 0, sizeof(rf));
 933         memset(&bb, 0, sizeof(bb));
 934         rf.att = rfatt;
 935         bb.att = bbatt;
 936         b43_lo_fixup_rfatt(&rf);
 937         cal = b43_get_calib_lo_settings(dev, &bb, &rf);
 938         if (!cal)
 939                 return;
 940         b43_lo_write(dev, &cal->ctl);
 941 }
 942
 943 /* Periodic LO maintanance work */
 944 void b43_lo_g_maintanance_work(struct b43_wldev *dev)
 945 {
 946         struct b43_phy *phy = &dev->phy;
 947         struct b43_phy_g *gphy = phy->g;
 948         struct b43_txpower_lo_control *lo = gphy->lo_control;
 949         unsigned long now;
 950         unsigned long expire;
 951         struct b43_lo_calib *cal, *tmp;
 952         bool current_item_expired = 0;
 953         bool hwpctl;
 954
 955         if (!lo)
 956                 return;
 957         now = jiffies;
 958         hwpctl = b43_has_hardware_pctl(dev);
 959
 960         if (hwpctl) {
 961                 /* Read the power vector and update it, if needed. */
 962                 expire = now - B43_LO_PWRVEC_EXPIRE;
 963                 if (time_before(lo->pwr_vec_read_time, expire)) {
 964                         lo_read_power_vector(dev);
 965                         b43_gphy_dc_lt_init(dev, 0);
 966                 }
 967                 //FIXME Recalc the whole DC table from time to time?
 968         }
 969
 970         if (hwpctl)
 971                 return;
 972         /* Search for expired LO settings. Remove them.
 973          * Recalibrate the current setting, if expired. */
 974         expire = now - B43_LO_CALIB_EXPIRE;
 975         list_for_each_entry_safe(cal, tmp, &lo->calib_list, list) {
 976                 if (!time_before(cal->calib_time, expire))
 977                         continue;
 978                 /* This item expired. */
 979                 if (b43_compare_bbatt(&cal->bbatt, &gphy->bbatt) &&
 980                     b43_compare_rfatt(&cal->rfatt, &gphy->rfatt)) {
 981                         B43_WARN_ON(current_item_expired);
 982                         current_item_expired = 1;
 983                 }
 984                 if (b43_debug(dev, B43_DBG_LO)) {
 985                         b43dbg(dev->wl, "LO: Item BB(%u), RF(%u,%u), "
 986                                "I=%d, Q=%d expired\n",
 987                                cal->bbatt.att, cal->rfatt.att,
 988                                cal->rfatt.with_padmix,
 989                                cal->ctl.i, cal->ctl.q);
 990                 }
 991                 list_del(&cal->list);
 992                 kfree(cal);
 993         }
 994         if (current_item_expired || unlikely(list_empty(&lo->calib_list))) {
 995                 /* Recalibrate currently used LO setting. */
 996                 if (b43_debug(dev, B43_DBG_LO))
 997                         b43dbg(dev->wl, "LO: Recalibrating current LO setting\n");
 998                 cal = b43_calibrate_lo_setting(dev, &gphy->bbatt, &gphy->rfatt);
 999                 if (cal) {
1000                         list_add(&cal->list, &lo->calib_list);
1001                         b43_lo_write(dev, &cal->ctl);
1002                 } else
1003                         b43warn(dev->wl, "Failed to recalibrate current LO setting\n");
1004         }
1005 }
1006
1007 void b43_lo_g_cleanup(struct b43_wldev *dev)
1008 {
1009         struct b43_txpower_lo_control *lo = dev->phy.g->lo_control;
1010         struct b43_lo_calib *cal, *tmp;
1011
1012         if (!lo)
1013                 return;
1014         list_for_each_entry_safe(cal, tmp, &lo->calib_list, list) {
1015                 list_del(&cal->list);
1016                 kfree(cal);
1017         }
1018 }
1019
1020 /* LO Initialization */
1021 void b43_lo_g_init(struct b43_wldev *dev)
1022 {
1023         if (b43_has_hardware_pctl(dev)) {
1024                 lo_read_power_vector(dev);
1025                 b43_gphy_dc_lt_init(dev, 1);
1026         }
1027 }