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_maskset(dev, 0x43, 0xFFF0, radio_pctl_reg);
 229         b43_gphy_set_baseband_attenuation(dev, 2);
 230
 231         reg = lo_txctl_register_table(dev, &mask, NULL);
 232         mask = ~mask;
 233         b43_radio_mask(dev, reg, mask);
 234
 235         if (has_tx_magnification(phy)) {
 236                 int i, j;
 237                 int feedthrough;
 238                 int min_feedth = 0xFFFF;
 239                 u8 tx_magn, tx_bias;
 240
 241                 for (i = 0; i < ARRAY_SIZE(tx_magn_values); i++) {
 242                         tx_magn = tx_magn_values[i];
 243                         b43_radio_maskset(dev, 0x52, 0xFF0F, tx_magn);
 244                         for (j = 0; j < ARRAY_SIZE(tx_bias_values); j++) {
 245                                 tx_bias = tx_bias_values[j];
 246                                 b43_radio_maskset(dev, 0x52, 0xFFF0, tx_bias);
 247                                 feedthrough =
 248                                     lo_measure_feedthrough(dev, 0, pga,
 249                                                            trsw_rx);
 250                                 if (feedthrough < min_feedth) {
 251                                         lo->tx_bias = tx_bias;
 252                                         lo->tx_magn = tx_magn;
 253                                         min_feedth = feedthrough;
 254                                 }
 255                                 if (lo->tx_bias == 0)
 256                                         break;
 257                         }
 258                         b43_radio_write16(dev, 0x52,
 259                                           (b43_radio_read16(dev, 0x52)
 260                                            & 0xFF00) | lo->tx_bias | lo->
 261                                           tx_magn);
 262                 }
 263         } else {
 264                 lo->tx_magn = 0;
 265                 lo->tx_bias = 0;
 266                 b43_radio_mask(dev, 0x52, 0xFFF0);      /* TX bias == 0 */
 267         }
 268         lo->txctl_measured_time = jiffies;
 269 }
 270
 271 static void lo_read_power_vector(struct b43_wldev *dev)
 272 {
 273         struct b43_phy *phy = &dev->phy;
 274         struct b43_phy_g *gphy = phy->g;
 275         struct b43_txpower_lo_control *lo = gphy->lo_control;
 276         int i;
 277         u64 tmp;
 278         u64 power_vector = 0;
 279
 280         for (i = 0; i < 8; i += 2) {
 281                 tmp = b43_shm_read16(dev, B43_SHM_SHARED, 0x310 + i);
 282                 power_vector |= (tmp << (i * 8));
 283                 /* Clear the vector on the device. */
 284                 b43_shm_write16(dev, B43_SHM_SHARED, 0x310 + i, 0);
 285         }
 286         if (power_vector)
 287                 lo->power_vector = power_vector;
 288         lo->pwr_vec_read_time = jiffies;
 289 }
 290
 291 /* 802.11/LO/GPHY/MeasuringGains */
 292 static void lo_measure_gain_values(struct b43_wldev *dev,
 293                                    s16 max_rx_gain, int use_trsw_rx)
 294 {
 295         struct b43_phy *phy = &dev->phy;
 296         struct b43_phy_g *gphy = phy->g;
 297         u16 tmp;
 298
 299         if (max_rx_gain < 0)
 300                 max_rx_gain = 0;
 301
 302         if (has_loopback_gain(phy)) {
 303                 int trsw_rx = 0;
 304                 int trsw_rx_gain;
 305
 306                 if (use_trsw_rx) {
 307                         trsw_rx_gain = gphy->trsw_rx_gain / 2;
 308                         if (max_rx_gain >= trsw_rx_gain) {
 309                                 trsw_rx_gain = max_rx_gain - trsw_rx_gain;
 310                                 trsw_rx = 0x20;
 311                         }
 312                 } else
 313                         trsw_rx_gain = max_rx_gain;
 314                 if (trsw_rx_gain < 9) {
 315                         gphy->lna_lod_gain = 0;
 316                 } else {
 317                         gphy->lna_lod_gain = 1;
 318                         trsw_rx_gain -= 8;
 319                 }
 320                 trsw_rx_gain = clamp_val(trsw_rx_gain, 0, 0x2D);
 321                 gphy->pga_gain = trsw_rx_gain / 3;
 322                 if (gphy->pga_gain >= 5) {
 323                         gphy->pga_gain -= 5;
 324                         gphy->lna_gain = 2;
 325                 } else
 326                         gphy->lna_gain = 0;
 327         } else {
 328                 gphy->lna_gain = 0;
 329                 gphy->trsw_rx_gain = 0x20;
 330                 if (max_rx_gain >= 0x14) {
 331                         gphy->lna_lod_gain = 1;
 332                         gphy->pga_gain = 2;
 333                 } else if (max_rx_gain >= 0x12) {
 334                         gphy->lna_lod_gain = 1;
 335                         gphy->pga_gain = 1;
 336                 } else if (max_rx_gain >= 0xF) {
 337                         gphy->lna_lod_gain = 1;
 338                         gphy->pga_gain = 0;
 339                 } else {
 340                         gphy->lna_lod_gain = 0;
 341                         gphy->pga_gain = 0;
 342                 }
 343         }
 344
 345         tmp = b43_radio_read16(dev, 0x7A);
 346         if (gphy->lna_lod_gain == 0)
 347                 tmp &= ~0x0008;
 348         else
 349                 tmp |= 0x0008;
 350         b43_radio_write16(dev, 0x7A, tmp);
 351 }
 352
 353 struct lo_g_saved_values {
 354         u8 old_channel;
 355
 356         /* Core registers */
 357         u16 reg_3F4;
 358         u16 reg_3E2;
 359
 360         /* PHY registers */
 361         u16 phy_lo_mask;
 362         u16 phy_extg_01;
 363         u16 phy_dacctl_hwpctl;
 364         u16 phy_dacctl;
 365         u16 phy_cck_14;
 366         u16 phy_hpwr_tssictl;
 367         u16 phy_analogover;
 368         u16 phy_analogoverval;
 369         u16 phy_rfover;
 370         u16 phy_rfoverval;
 371         u16 phy_classctl;
 372         u16 phy_cck_3E;
 373         u16 phy_crs0;
 374         u16 phy_pgactl;
 375         u16 phy_cck_2A;
 376         u16 phy_syncctl;
 377         u16 phy_cck_30;
 378         u16 phy_cck_06;
 379
 380         /* Radio registers */
 381         u16 radio_43;
 382         u16 radio_7A;
 383         u16 radio_52;
 384 };
 385
 386 static void lo_measure_setup(struct b43_wldev *dev,
 387                              struct lo_g_saved_values *sav)
 388 {
 389         struct ssb_sprom *sprom = &dev->dev->bus->sprom;
 390         struct b43_phy *phy = &dev->phy;
 391         struct b43_phy_g *gphy = phy->g;
 392         struct b43_txpower_lo_control *lo = gphy->lo_control;
 393         u16 tmp;
 394
 395         if (b43_has_hardware_pctl(dev)) {
 396                 sav->phy_lo_mask = b43_phy_read(dev, B43_PHY_LO_MASK);
 397                 sav->phy_extg_01 = b43_phy_read(dev, B43_PHY_EXTG(0x01));
 398                 sav->phy_dacctl_hwpctl = b43_phy_read(dev, B43_PHY_DACCTL);
 399                 sav->phy_cck_14 = b43_phy_read(dev, B43_PHY_CCK(0x14));
 400                 sav->phy_hpwr_tssictl = b43_phy_read(dev, B43_PHY_HPWR_TSSICTL);
 401
 402                 b43_phy_set(dev, B43_PHY_HPWR_TSSICTL, 0x100);
 403                 b43_phy_set(dev, B43_PHY_EXTG(0x01), 0x40);
 404                 b43_phy_set(dev, B43_PHY_DACCTL, 0x40);
 405                 b43_phy_set(dev, B43_PHY_CCK(0x14), 0x200);
 406         }
 407         if (phy->type == B43_PHYTYPE_B &&
 408             phy->radio_ver == 0x2050 && phy->radio_rev < 6) {
 409                 b43_phy_write(dev, B43_PHY_CCK(0x16), 0x410);
 410                 b43_phy_write(dev, B43_PHY_CCK(0x17), 0x820);
 411         }
 412         if (phy->rev >= 2) {
 413                 sav->phy_analogover = b43_phy_read(dev, B43_PHY_ANALOGOVER);
 414                 sav->phy_analogoverval =
 415                     b43_phy_read(dev, B43_PHY_ANALOGOVERVAL);
 416                 sav->phy_rfover = b43_phy_read(dev, B43_PHY_RFOVER);
 417                 sav->phy_rfoverval = b43_phy_read(dev, B43_PHY_RFOVERVAL);
 418                 sav->phy_classctl = b43_phy_read(dev, B43_PHY_CLASSCTL);
 419                 sav->phy_cck_3E = b43_phy_read(dev, B43_PHY_CCK(0x3E));
 420                 sav->phy_crs0 = b43_phy_read(dev, B43_PHY_CRS0);
 421
 422                 b43_phy_mask(dev, B43_PHY_CLASSCTL, 0xFFFC);
 423                 b43_phy_mask(dev, B43_PHY_CRS0, 0x7FFF);
 424                 b43_phy_set(dev, B43_PHY_ANALOGOVER, 0x0003);
 425                 b43_phy_mask(dev, B43_PHY_ANALOGOVERVAL, 0xFFFC);
 426                 if (phy->type == B43_PHYTYPE_G) {
 427                         if ((phy->rev >= 7) &&
 428                             (sprom->boardflags_lo & B43_BFL_EXTLNA)) {
 429                                 b43_phy_write(dev, B43_PHY_RFOVER, 0x933);
 430                         } else {
 431                                 b43_phy_write(dev, B43_PHY_RFOVER, 0x133);
 432                         }
 433                 } else {
 434                         b43_phy_write(dev, B43_PHY_RFOVER, 0);
 435                 }
 436                 b43_phy_write(dev, B43_PHY_CCK(0x3E), 0);
 437         }
 438         sav->reg_3F4 = b43_read16(dev, 0x3F4);
 439         sav->reg_3E2 = b43_read16(dev, 0x3E2);
 440         sav->radio_43 = b43_radio_read16(dev, 0x43);
 441         sav->radio_7A = b43_radio_read16(dev, 0x7A);
 442         sav->phy_pgactl = b43_phy_read(dev, B43_PHY_PGACTL);
 443         sav->phy_cck_2A = b43_phy_read(dev, B43_PHY_CCK(0x2A));
 444         sav->phy_syncctl = b43_phy_read(dev, B43_PHY_SYNCCTL);
 445         sav->phy_dacctl = b43_phy_read(dev, B43_PHY_DACCTL);
 446
 447         if (!has_tx_magnification(phy)) {
 448                 sav->radio_52 = b43_radio_read16(dev, 0x52);
 449                 sav->radio_52 &= 0x00F0;
 450         }
 451         if (phy->type == B43_PHYTYPE_B) {
 452                 sav->phy_cck_30 = b43_phy_read(dev, B43_PHY_CCK(0x30));
 453                 sav->phy_cck_06 = b43_phy_read(dev, B43_PHY_CCK(0x06));
 454                 b43_phy_write(dev, B43_PHY_CCK(0x30), 0x00FF);
 455                 b43_phy_write(dev, B43_PHY_CCK(0x06), 0x3F3F);
 456         } else {
 457                 b43_write16(dev, 0x3E2, b43_read16(dev, 0x3E2)
 458                             | 0x8000);
 459         }
 460         b43_write16(dev, 0x3F4, b43_read16(dev, 0x3F4)
 461                     & 0xF000);
 462
 463         tmp =
 464             (phy->type == B43_PHYTYPE_G) ? B43_PHY_LO_MASK : B43_PHY_CCK(0x2E);
 465         b43_phy_write(dev, tmp, 0x007F);
 466
 467         tmp = sav->phy_syncctl;
 468         b43_phy_write(dev, B43_PHY_SYNCCTL, tmp & 0xFF7F);
 469         tmp = sav->radio_7A;
 470         b43_radio_write16(dev, 0x007A, tmp & 0xFFF0);
 471
 472         b43_phy_write(dev, B43_PHY_CCK(0x2A), 0x8A3);
 473         if (phy->type == B43_PHYTYPE_G ||
 474             (phy->type == B43_PHYTYPE_B &&
 475              phy->radio_ver == 0x2050 && phy->radio_rev >= 6)) {
 476                 b43_phy_write(dev, B43_PHY_CCK(0x2B), 0x1003);
 477         } else
 478                 b43_phy_write(dev, B43_PHY_CCK(0x2B), 0x0802);
 479         if (phy->rev >= 2)
 480                 b43_dummy_transmission(dev);
 481         b43_gphy_channel_switch(dev, 6, 0);
 482         b43_radio_read16(dev, 0x51);    /* dummy read */
 483         if (phy->type == B43_PHYTYPE_G)
 484                 b43_phy_write(dev, B43_PHY_CCK(0x2F), 0);
 485
 486         /* Re-measure the txctl values, if needed. */
 487         if (time_before(lo->txctl_measured_time,
 488                         jiffies - B43_LO_TXCTL_EXPIRE))
 489                 lo_measure_txctl_values(dev);
 490
 491         if (phy->type == B43_PHYTYPE_G && phy->rev >= 3) {
 492                 b43_phy_write(dev, B43_PHY_LO_MASK, 0xC078);
 493         } else {
 494                 if (phy->type == B43_PHYTYPE_B)
 495                         b43_phy_write(dev, B43_PHY_CCK(0x2E), 0x8078);
 496                 else
 497                         b43_phy_write(dev, B43_PHY_LO_MASK, 0x8078);
 498         }
 499 }
 500
 501 static void lo_measure_restore(struct b43_wldev *dev,
 502                                struct lo_g_saved_values *sav)
 503 {
 504         struct b43_phy *phy = &dev->phy;
 505         struct b43_phy_g *gphy = phy->g;
 506         u16 tmp;
 507
 508         if (phy->rev >= 2) {
 509                 b43_phy_write(dev, B43_PHY_PGACTL, 0xE300);
 510                 tmp = (gphy->pga_gain << 8);
 511                 b43_phy_write(dev, B43_PHY_RFOVERVAL, tmp | 0xA0);
 512                 udelay(5);
 513                 b43_phy_write(dev, B43_PHY_RFOVERVAL, tmp | 0xA2);
 514                 udelay(2);
 515                 b43_phy_write(dev, B43_PHY_RFOVERVAL, tmp | 0xA3);
 516         } else {
 517                 tmp = (gphy->pga_gain | 0xEFA0);
 518                 b43_phy_write(dev, B43_PHY_PGACTL, tmp);
 519         }
 520         if (phy->type == B43_PHYTYPE_G) {
 521                 if (phy->rev >= 3)
 522                         b43_phy_write(dev, B43_PHY_CCK(0x2E), 0xC078);
 523                 else
 524                         b43_phy_write(dev, B43_PHY_CCK(0x2E), 0x8078);
 525                 if (phy->rev >= 2)
 526                         b43_phy_write(dev, B43_PHY_CCK(0x2F), 0x0202);
 527                 else
 528                         b43_phy_write(dev, B43_PHY_CCK(0x2F), 0x0101);
 529         }
 530         b43_write16(dev, 0x3F4, sav->reg_3F4);
 531         b43_phy_write(dev, B43_PHY_PGACTL, sav->phy_pgactl);
 532         b43_phy_write(dev, B43_PHY_CCK(0x2A), sav->phy_cck_2A);
 533         b43_phy_write(dev, B43_PHY_SYNCCTL, sav->phy_syncctl);
 534         b43_phy_write(dev, B43_PHY_DACCTL, sav->phy_dacctl);
 535         b43_radio_write16(dev, 0x43, sav->radio_43);
 536         b43_radio_write16(dev, 0x7A, sav->radio_7A);
 537         if (!has_tx_magnification(phy)) {
 538                 tmp = sav->radio_52;
 539                 b43_radio_maskset(dev, 0x52, 0xFF0F, tmp);
 540         }
 541         b43_write16(dev, 0x3E2, sav->reg_3E2);
 542         if (phy->type == B43_PHYTYPE_B &&
 543             phy->radio_ver == 0x2050 && phy->radio_rev <= 5) {
 544                 b43_phy_write(dev, B43_PHY_CCK(0x30), sav->phy_cck_30);
 545                 b43_phy_write(dev, B43_PHY_CCK(0x06), sav->phy_cck_06);
 546         }
 547         if (phy->rev >= 2) {
 548                 b43_phy_write(dev, B43_PHY_ANALOGOVER, sav->phy_analogover);
 549                 b43_phy_write(dev, B43_PHY_ANALOGOVERVAL,
 550                               sav->phy_analogoverval);
 551                 b43_phy_write(dev, B43_PHY_CLASSCTL, sav->phy_classctl);
 552                 b43_phy_write(dev, B43_PHY_RFOVER, sav->phy_rfover);
 553                 b43_phy_write(dev, B43_PHY_RFOVERVAL, sav->phy_rfoverval);
 554                 b43_phy_write(dev, B43_PHY_CCK(0x3E), sav->phy_cck_3E);
 555                 b43_phy_write(dev, B43_PHY_CRS0, sav->phy_crs0);
 556         }
 557         if (b43_has_hardware_pctl(dev)) {
 558                 tmp = (sav->phy_lo_mask & 0xBFFF);
 559                 b43_phy_write(dev, B43_PHY_LO_MASK, tmp);
 560                 b43_phy_write(dev, B43_PHY_EXTG(0x01), sav->phy_extg_01);
 561                 b43_phy_write(dev, B43_PHY_DACCTL, sav->phy_dacctl_hwpctl);
 562                 b43_phy_write(dev, B43_PHY_CCK(0x14), sav->phy_cck_14);
 563                 b43_phy_write(dev, B43_PHY_HPWR_TSSICTL, sav->phy_hpwr_tssictl);
 564         }
 565         b43_gphy_channel_switch(dev, sav->old_channel, 1);
 566 }
 567
 568 struct b43_lo_g_statemachine {
 569         int current_state;
 570         int nr_measured;
 571         int state_val_multiplier;
 572         u16 lowest_feedth;
 573         struct b43_loctl min_loctl;
 574 };
 575
 576 /* Loop over each possible value in this state. */
 577 static int lo_probe_possible_loctls(struct b43_wldev *dev,
 578                                     struct b43_loctl *probe_loctl,
 579                                     struct b43_lo_g_statemachine *d)
 580 {
 581         struct b43_phy *phy = &dev->phy;
 582         struct b43_phy_g *gphy = phy->g;
 583         struct b43_loctl test_loctl;
 584         struct b43_loctl orig_loctl;
 585         struct b43_loctl prev_loctl = {
 586                 .i = -100,
 587                 .q = -100,
 588         };
 589         int i;
 590         int begin, end;
 591         int found_lower = 0;
 592         u16 feedth;
 593
 594         static const struct b43_loctl modifiers[] = {
 595                 {.i = 1,.q = 1,},
 596                 {.i = 1,.q = 0,},
 597                 {.i = 1,.q = -1,},
 598                 {.i = 0,.q = -1,},
 599                 {.i = -1,.q = -1,},
 600                 {.i = -1,.q = 0,},
 601                 {.i = -1,.q = 1,},
 602                 {.i = 0,.q = 1,},
 603         };
 604
 605         if (d->current_state == 0) {
 606                 begin = 1;
 607                 end = 8;
 608         } else if (d->current_state % 2 == 0) {
 609                 begin = d->current_state - 1;
 610                 end = d->current_state + 1;
 611         } else {
 612                 begin = d->current_state - 2;
 613                 end = d->current_state + 2;
 614         }
 615         if (begin < 1)
 616                 begin += 8;
 617         if (end > 8)
 618                 end -= 8;
 619
 620         memcpy(&orig_loctl, probe_loctl, sizeof(struct b43_loctl));
 621         i = begin;
 622         d->current_state = i;
 623         while (1) {
 624                 B43_WARN_ON(!(i >= 1 && i <= 8));
 625                 memcpy(&test_loctl, &orig_loctl, sizeof(struct b43_loctl));
 626                 test_loctl.i += modifiers[i - 1].i * d->state_val_multiplier;
 627                 test_loctl.q += modifiers[i - 1].q * d->state_val_multiplier;
 628                 if ((test_loctl.i != prev_loctl.i ||
 629                      test_loctl.q != prev_loctl.q) &&
 630                     (abs(test_loctl.i) <= 16 && abs(test_loctl.q) <= 16)) {
 631                         b43_lo_write(dev, &test_loctl);
 632                         feedth = lo_measure_feedthrough(dev, gphy->lna_gain,
 633                                                         gphy->pga_gain,
 634                                                         gphy->trsw_rx_gain);
 635                         if (feedth < d->lowest_feedth) {
 636                                 memcpy(probe_loctl, &test_loctl,
 637                                        sizeof(struct b43_loctl));
 638                                 found_lower = 1;
 639                                 d->lowest_feedth = feedth;
 640                                 if ((d->nr_measured < 2) &&
 641                                     !has_loopback_gain(phy))
 642                                         break;
 643                         }
 644                 }
 645                 memcpy(&prev_loctl, &test_loctl, sizeof(prev_loctl));
 646                 if (i == end)
 647                         break;
 648                 if (i == 8)
 649                         i = 1;
 650                 else
 651                         i++;
 652                 d->current_state = i;
 653         }
 654
 655         return found_lower;
 656 }
 657
 658 static void lo_probe_loctls_statemachine(struct b43_wldev *dev,
 659                                          struct b43_loctl *loctl,
 660                                          int *max_rx_gain)
 661 {
 662         struct b43_phy *phy = &dev->phy;
 663         struct b43_phy_g *gphy = phy->g;
 664         struct b43_lo_g_statemachine d;
 665         u16 feedth;
 666         int found_lower;
 667         struct b43_loctl probe_loctl;
 668         int max_repeat = 1, repeat_cnt = 0;
 669
 670         d.nr_measured = 0;
 671         d.state_val_multiplier = 1;
 672         if (has_loopback_gain(phy))
 673                 d.state_val_multiplier = 3;
 674
 675         memcpy(&d.min_loctl, loctl, sizeof(struct b43_loctl));
 676         if (has_loopback_gain(phy))
 677                 max_repeat = 4;
 678         do {
 679                 b43_lo_write(dev, &d.min_loctl);
 680                 feedth = lo_measure_feedthrough(dev, gphy->lna_gain,
 681                                                 gphy->pga_gain,
 682                                                 gphy->trsw_rx_gain);
 683                 if (feedth < 0x258) {
 684                         if (feedth >= 0x12C)
 685                                 *max_rx_gain += 6;
 686                         else
 687                                 *max_rx_gain += 3;
 688                         feedth = lo_measure_feedthrough(dev, gphy->lna_gain,
 689                                                         gphy->pga_gain,
 690                                                         gphy->trsw_rx_gain);
 691                 }
 692                 d.lowest_feedth = feedth;
 693
 694                 d.current_state = 0;
 695                 do {
 696                         B43_WARN_ON(!
 697                                     (d.current_state >= 0
 698                                      && d.current_state <= 8));
 699                         memcpy(&probe_loctl, &d.min_loctl,
 700                                sizeof(struct b43_loctl));
 701                         found_lower =
 702                             lo_probe_possible_loctls(dev, &probe_loctl, &d);
 703                         if (!found_lower)
 704                                 break;
 705                         if ((probe_loctl.i == d.min_loctl.i) &&
 706                             (probe_loctl.q == d.min_loctl.q))
 707                                 break;
 708                         memcpy(&d.min_loctl, &probe_loctl,
 709                                sizeof(struct b43_loctl));
 710                         d.nr_measured++;
 711                 } while (d.nr_measured < 24);
 712                 memcpy(loctl, &d.min_loctl, sizeof(struct b43_loctl));
 713
 714                 if (has_loopback_gain(phy)) {
 715                         if (d.lowest_feedth > 0x1194)
 716                                 *max_rx_gain -= 6;
 717                         else if (d.lowest_feedth < 0x5DC)
 718                                 *max_rx_gain += 3;
 719                         if (repeat_cnt == 0) {
 720                                 if (d.lowest_feedth <= 0x5DC) {
 721                                         d.state_val_multiplier = 1;
 722                                         repeat_cnt++;
 723                                 } else
 724                                         d.state_val_multiplier = 2;
 725                         } else if (repeat_cnt == 2)
 726                                 d.state_val_multiplier = 1;
 727                 }
 728                 lo_measure_gain_values(dev, *max_rx_gain,
 729                                        has_loopback_gain(phy));
 730         } while (++repeat_cnt < max_repeat);
 731 }
 732
 733 static
 734 struct b43_lo_calib *b43_calibrate_lo_setting(struct b43_wldev *dev,
 735                                               const struct b43_bbatt *bbatt,
 736                                               const struct b43_rfatt *rfatt)
 737 {
 738         struct b43_phy *phy = &dev->phy;
 739         struct b43_phy_g *gphy = phy->g;
 740         struct b43_loctl loctl = {
 741                 .i = 0,
 742                 .q = 0,
 743         };
 744         int max_rx_gain;
 745         struct b43_lo_calib *cal;
 746         struct lo_g_saved_values uninitialized_var(saved_regs);
 747         /* Values from the "TXCTL Register and Value Table" */
 748         u16 txctl_reg;
 749         u16 txctl_value;
 750         u16 pad_mix_gain;
 751
 752         saved_regs.old_channel = phy->channel;
 753         b43_mac_suspend(dev);
 754         lo_measure_setup(dev, &saved_regs);
 755
 756         txctl_reg = lo_txctl_register_table(dev, &txctl_value, &pad_mix_gain);
 757
 758         b43_radio_maskset(dev, 0x43, 0xFFF0, rfatt->att);
 759         b43_radio_maskset(dev, txctl_reg, ~txctl_value, (rfatt->with_padmix ? txctl_value :0));
 760
 761         max_rx_gain = rfatt->att * 2;
 762         max_rx_gain += bbatt->att / 2;
 763         if (rfatt->with_padmix)
 764                 max_rx_gain -= pad_mix_gain;
 765         if (has_loopback_gain(phy))
 766                 max_rx_gain += gphy->max_lb_gain;
 767         lo_measure_gain_values(dev, max_rx_gain,
 768                                has_loopback_gain(phy));
 769
 770         b43_gphy_set_baseband_attenuation(dev, bbatt->att);
 771         lo_probe_loctls_statemachine(dev, &loctl, &max_rx_gain);
 772
 773         lo_measure_restore(dev, &saved_regs);
 774         b43_mac_enable(dev);
 775
 776         if (b43_debug(dev, B43_DBG_LO)) {
 777                 b43dbg(dev->wl, "LO: Calibrated for BB(%u), RF(%u,%u) "
 778                        "=> I=%d Q=%d\n",
 779                        bbatt->att, rfatt->att, rfatt->with_padmix,
 780                        loctl.i, loctl.q);
 781         }
 782
 783         cal = kmalloc(sizeof(*cal), GFP_KERNEL);
 784         if (!cal) {
 785                 b43warn(dev->wl, "LO calib: out of memory\n");
 786                 return NULL;
 787         }
 788         memcpy(&cal->bbatt, bbatt, sizeof(*bbatt));
 789         memcpy(&cal->rfatt, rfatt, sizeof(*rfatt));
 790         memcpy(&cal->ctl, &loctl, sizeof(loctl));
 791         cal->calib_time = jiffies;
 792         INIT_LIST_HEAD(&cal->list);
 793
 794         return cal;
 795 }
 796
 797 /* Get a calibrated LO setting for the given attenuation values.
 798  * Might return a NULL pointer under OOM! */
 799 static
 800 struct b43_lo_calib *b43_get_calib_lo_settings(struct b43_wldev *dev,
 801                                                const struct b43_bbatt *bbatt,
 802                                                const struct b43_rfatt *rfatt)
 803 {
 804         struct b43_txpower_lo_control *lo = dev->phy.g->lo_control;
 805         struct b43_lo_calib *c;
 806
 807         c = b43_find_lo_calib(lo, bbatt, rfatt);
 808         if (c)
 809                 return c;
 810         /* Not in the list of calibrated LO settings.
 811          * Calibrate it now. */
 812         c = b43_calibrate_lo_setting(dev, bbatt, rfatt);
 813         if (!c)
 814                 return NULL;
 815         list_add(&c->list, &lo->calib_list);
 816
 817         return c;
 818 }
 819
 820 void b43_gphy_dc_lt_init(struct b43_wldev *dev, bool update_all)
 821 {
 822         struct b43_phy *phy = &dev->phy;
 823         struct b43_phy_g *gphy = phy->g;
 824         struct b43_txpower_lo_control *lo = gphy->lo_control;
 825         int i;
 826         int rf_offset, bb_offset;
 827         const struct b43_rfatt *rfatt;
 828         const struct b43_bbatt *bbatt;
 829         u64 power_vector;
 830         bool table_changed = 0;
 831
 832         BUILD_BUG_ON(B43_DC_LT_SIZE != 32);
 833         B43_WARN_ON(lo->rfatt_list.len * lo->bbatt_list.len > 64);
 834
 835         power_vector = lo->power_vector;
 836         if (!update_all && !power_vector)
 837                 return; /* Nothing to do. */
 838
 839         /* Suspend the MAC now to avoid continuous suspend/enable
 840          * cycles in the loop. */
 841         b43_mac_suspend(dev);
 842
 843         for (i = 0; i < B43_DC_LT_SIZE * 2; i++) {
 844                 struct b43_lo_calib *cal;
 845                 int idx;
 846                 u16 val;
 847
 848                 if (!update_all && !(power_vector & (((u64)1ULL) << i)))
 849                         continue;
 850                 /* Update the table entry for this power_vector bit.
 851                  * The table rows are RFatt entries and columns are BBatt. */
 852                 bb_offset = i / lo->rfatt_list.len;
 853                 rf_offset = i % lo->rfatt_list.len;
 854                 bbatt = &(lo->bbatt_list.list[bb_offset]);
 855                 rfatt = &(lo->rfatt_list.list[rf_offset]);
 856
 857                 cal = b43_calibrate_lo_setting(dev, bbatt, rfatt);
 858                 if (!cal) {
 859                         b43warn(dev->wl, "LO: Could not "
 860                                 "calibrate DC table entry\n");
 861                         continue;
 862                 }
 863                 /*FIXME: Is Q really in the low nibble? */
 864                 val = (u8)(cal->ctl.q);
 865                 val |= ((u8)(cal->ctl.i)) << 4;
 866                 kfree(cal);
 867
 868                 /* Get the index into the hardware DC LT. */
 869                 idx = i / 2;
 870                 /* Change the table in memory. */
 871                 if (i % 2) {
 872                         /* Change the high byte. */
 873                         lo->dc_lt[idx] = (lo->dc_lt[idx] & 0x00FF)
 874                                          | ((val & 0x00FF) << 8);
 875                 } else {
 876                         /* Change the low byte. */
 877                         lo->dc_lt[idx] = (lo->dc_lt[idx] & 0xFF00)
 878                                          | (val & 0x00FF);
 879                 }
 880                 table_changed = 1;
 881         }
 882         if (table_changed) {
 883                 /* The table changed in memory. Update the hardware table. */
 884                 for (i = 0; i < B43_DC_LT_SIZE; i++)
 885                         b43_phy_write(dev, 0x3A0 + i, lo->dc_lt[i]);
 886         }
 887         b43_mac_enable(dev);
 888 }
 889
 890 /* Fixup the RF attenuation value for the case where we are
 891  * using the PAD mixer. */
 892 static inline void b43_lo_fixup_rfatt(struct b43_rfatt *rf)
 893 {
 894         if (!rf->with_padmix)
 895                 return;
 896         if ((rf->att != 1) && (rf->att != 2) && (rf->att != 3))
 897                 rf->att = 4;
 898 }
 899
 900 void b43_lo_g_adjust(struct b43_wldev *dev)
 901 {
 902         struct b43_phy_g *gphy = dev->phy.g;
 903         struct b43_lo_calib *cal;
 904         struct b43_rfatt rf;
 905
 906         memcpy(&rf, &gphy->rfatt, sizeof(rf));
 907         b43_lo_fixup_rfatt(&rf);
 908
 909         cal = b43_get_calib_lo_settings(dev, &gphy->bbatt, &rf);
 910         if (!cal)
 911                 return;
 912         b43_lo_write(dev, &cal->ctl);
 913 }
 914
 915 void b43_lo_g_adjust_to(struct b43_wldev *dev,
 916                         u16 rfatt, u16 bbatt, u16 tx_control)
 917 {
 918         struct b43_rfatt rf;
 919         struct b43_bbatt bb;
 920         struct b43_lo_calib *cal;
 921
 922         memset(&rf, 0, sizeof(rf));
 923         memset(&bb, 0, sizeof(bb));
 924         rf.att = rfatt;
 925         bb.att = bbatt;
 926         b43_lo_fixup_rfatt(&rf);
 927         cal = b43_get_calib_lo_settings(dev, &bb, &rf);
 928         if (!cal)
 929                 return;
 930         b43_lo_write(dev, &cal->ctl);
 931 }
 932
 933 /* Periodic LO maintanance work */
 934 void b43_lo_g_maintanance_work(struct b43_wldev *dev)
 935 {
 936         struct b43_phy *phy = &dev->phy;
 937         struct b43_phy_g *gphy = phy->g;
 938         struct b43_txpower_lo_control *lo = gphy->lo_control;
 939         unsigned long now;
 940         unsigned long expire;
 941         struct b43_lo_calib *cal, *tmp;
 942         bool current_item_expired = 0;
 943         bool hwpctl;
 944
 945         if (!lo)
 946                 return;
 947         now = jiffies;
 948         hwpctl = b43_has_hardware_pctl(dev);
 949
 950         if (hwpctl) {
 951                 /* Read the power vector and update it, if needed. */
 952                 expire = now - B43_LO_PWRVEC_EXPIRE;
 953                 if (time_before(lo->pwr_vec_read_time, expire)) {
 954                         lo_read_power_vector(dev);
 955                         b43_gphy_dc_lt_init(dev, 0);
 956                 }
 957                 //FIXME Recalc the whole DC table from time to time?
 958         }
 959
 960         if (hwpctl)
 961                 return;
 962         /* Search for expired LO settings. Remove them.
 963          * Recalibrate the current setting, if expired. */
 964         expire = now - B43_LO_CALIB_EXPIRE;
 965         list_for_each_entry_safe(cal, tmp, &lo->calib_list, list) {
 966                 if (!time_before(cal->calib_time, expire))
 967                         continue;
 968                 /* This item expired. */
 969                 if (b43_compare_bbatt(&cal->bbatt, &gphy->bbatt) &&
 970                     b43_compare_rfatt(&cal->rfatt, &gphy->rfatt)) {
 971                         B43_WARN_ON(current_item_expired);
 972                         current_item_expired = 1;
 973                 }
 974                 if (b43_debug(dev, B43_DBG_LO)) {
 975                         b43dbg(dev->wl, "LO: Item BB(%u), RF(%u,%u), "
 976                                "I=%d, Q=%d expired\n",
 977                                cal->bbatt.att, cal->rfatt.att,
 978                                cal->rfatt.with_padmix,
 979                                cal->ctl.i, cal->ctl.q);
 980                 }
 981                 list_del(&cal->list);
 982                 kfree(cal);
 983         }
 984         if (current_item_expired || unlikely(list_empty(&lo->calib_list))) {
 985                 /* Recalibrate currently used LO setting. */
 986                 if (b43_debug(dev, B43_DBG_LO))
 987                         b43dbg(dev->wl, "LO: Recalibrating current LO setting\n");
 988                 cal = b43_calibrate_lo_setting(dev, &gphy->bbatt, &gphy->rfatt);
 989                 if (cal) {
 990                         list_add(&cal->list, &lo->calib_list);
 991                         b43_lo_write(dev, &cal->ctl);
 992                 } else
 993                         b43warn(dev->wl, "Failed to recalibrate current LO setting\n");
 994         }
 995 }
 996
 997 void b43_lo_g_cleanup(struct b43_wldev *dev)
 998 {
 999         struct b43_txpower_lo_control *lo = dev->phy.g->lo_control;
1000         struct b43_lo_calib *cal, *tmp;
1001
1002         if (!lo)
1003                 return;
1004         list_for_each_entry_safe(cal, tmp, &lo->calib_list, list) {
1005                 list_del(&cal->list);
1006                 kfree(cal);
1007         }
1008 }
1009
1010 /* LO Initialization */
1011 void b43_lo_g_init(struct b43_wldev *dev)
1012 {
1013         if (b43_has_hardware_pctl(dev)) {
1014                 lo_read_power_vector(dev);
1015                 b43_gphy_dc_lt_init(dev, 1);
1016         }
1017 }