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 #include <linux/slab.h>
  38
  39
  40 static struct b43_lo_calib *b43_find_lo_calib(struct b43_txpower_lo_control *lo,
  41                                               const struct b43_bbatt *bbatt,
  42                                                const struct b43_rfatt *rfatt)
  43 {
  44         struct b43_lo_calib *c;
  45
  46         list_for_each_entry(c, &lo->calib_list, list) {
  47                 if (!b43_compare_bbatt(&c->bbatt, bbatt))
  48                         continue;
  49                 if (!b43_compare_rfatt(&c->rfatt, rfatt))
  50                         continue;
  51                 return c;
  52         }
  53
  54         return NULL;
  55 }
  56
  57 /* Write the LocalOscillator Control (adjust) value-pair. */
  58 static void b43_lo_write(struct b43_wldev *dev, struct b43_loctl *control)
  59 {
  60         struct b43_phy *phy = &dev->phy;
  61         u16 value;
  62
  63         if (B43_DEBUG) {
  64                 if (unlikely(abs(control->i) > 16 || abs(control->q) > 16)) {
  65                         b43dbg(dev->wl, "Invalid LO control pair "
  66                                "(I: %d, Q: %d)\n", control->i, control->q);
  67                         dump_stack();
  68                         return;
  69                 }
  70         }
  71         B43_WARN_ON(phy->type != B43_PHYTYPE_G);
  72
  73         value = (u8) (control->q);
  74         value |= ((u8) (control->i)) << 8;
  75         b43_phy_write(dev, B43_PHY_LO_CTL, value);
  76 }
  77
  78 static u16 lo_measure_feedthrough(struct b43_wldev *dev,
  79                                   u16 lna, u16 pga, u16 trsw_rx)
  80 {
  81         struct b43_phy *phy = &dev->phy;
  82         u16 rfover;
  83         u16 feedthrough;
  84
  85         if (phy->gmode) {
  86                 lna <<= B43_PHY_RFOVERVAL_LNA_SHIFT;
  87                 pga <<= B43_PHY_RFOVERVAL_PGA_SHIFT;
  88
  89                 B43_WARN_ON(lna & ~B43_PHY_RFOVERVAL_LNA);
  90                 B43_WARN_ON(pga & ~B43_PHY_RFOVERVAL_PGA);
  91 /*FIXME This assertion fails            B43_WARN_ON(trsw_rx & ~(B43_PHY_RFOVERVAL_TRSWRX |
  92                                     B43_PHY_RFOVERVAL_BW));
  93 */
  94                 trsw_rx &= (B43_PHY_RFOVERVAL_TRSWRX | B43_PHY_RFOVERVAL_BW);
  95
  96                 /* Construct the RF Override Value */
  97                 rfover = B43_PHY_RFOVERVAL_UNK;
  98                 rfover |= pga;
  99                 rfover |= lna;
 100                 rfover |= trsw_rx;
 101                 if ((dev->sdev->bus->sprom.boardflags_lo & B43_BFL_EXTLNA)
 102                     && phy->rev > 6)
 103                         rfover |= B43_PHY_RFOVERVAL_EXTLNA;
 104
 105                 b43_phy_write(dev, B43_PHY_PGACTL, 0xE300);
 106                 b43_phy_write(dev, B43_PHY_RFOVERVAL, rfover);
 107                 udelay(10);
 108                 rfover |= B43_PHY_RFOVERVAL_BW_LBW;
 109                 b43_phy_write(dev, B43_PHY_RFOVERVAL, rfover);
 110                 udelay(10);
 111                 rfover |= B43_PHY_RFOVERVAL_BW_LPF;
 112                 b43_phy_write(dev, B43_PHY_RFOVERVAL, rfover);
 113                 udelay(10);
 114                 b43_phy_write(dev, B43_PHY_PGACTL, 0xF300);
 115         } else {
 116                 pga |= B43_PHY_PGACTL_UNKNOWN;
 117                 b43_phy_write(dev, B43_PHY_PGACTL, pga);
 118                 udelay(10);
 119                 pga |= B43_PHY_PGACTL_LOWBANDW;
 120                 b43_phy_write(dev, B43_PHY_PGACTL, pga);
 121                 udelay(10);
 122                 pga |= B43_PHY_PGACTL_LPF;
 123                 b43_phy_write(dev, B43_PHY_PGACTL, pga);
 124         }
 125         udelay(21);
 126         feedthrough = b43_phy_read(dev, B43_PHY_LO_LEAKAGE);
 127
 128         /* This is a good place to check if we need to relax a bit,
 129          * as this is the main function called regularly
 130          * in the LO calibration. */
 131         cond_resched();
 132
 133         return feedthrough;
 134 }
 135
 136 /* TXCTL Register and Value Table.
 137  * Returns the "TXCTL Register".
 138  * "value" is the "TXCTL Value".
 139  * "pad_mix_gain" is the PAD Mixer Gain.
 140  */
 141 static u16 lo_txctl_register_table(struct b43_wldev *dev,
 142                                    u16 *value, u16 *pad_mix_gain)
 143 {
 144         struct b43_phy *phy = &dev->phy;
 145         u16 reg, v, padmix;
 146
 147         if (phy->type == B43_PHYTYPE_B) {
 148                 v = 0x30;
 149                 if (phy->radio_rev <= 5) {
 150                         reg = 0x43;
 151                         padmix = 0;
 152                 } else {
 153                         reg = 0x52;
 154                         padmix = 5;
 155                 }
 156         } else {
 157                 if (phy->rev >= 2 && phy->radio_rev == 8) {
 158                         reg = 0x43;
 159                         v = 0x10;
 160                         padmix = 2;
 161                 } else {
 162                         reg = 0x52;
 163                         v = 0x30;
 164                         padmix = 5;
 165                 }
 166         }
 167         if (value)
 168                 *value = v;
 169         if (pad_mix_gain)
 170                 *pad_mix_gain = padmix;
 171
 172         return reg;
 173 }
 174
 175 static void lo_measure_txctl_values(struct b43_wldev *dev)
 176 {
 177         struct b43_phy *phy = &dev->phy;
 178         struct b43_phy_g *gphy = phy->g;
 179         struct b43_txpower_lo_control *lo = gphy->lo_control;
 180         u16 reg, mask;
 181         u16 trsw_rx, pga;
 182         u16 radio_pctl_reg;
 183
 184         static const u8 tx_bias_values[] = {
 185                 0x09, 0x08, 0x0A, 0x01, 0x00,
 186                 0x02, 0x05, 0x04, 0x06,
 187         };
 188         static const u8 tx_magn_values[] = {
 189                 0x70, 0x40,
 190         };
 191
 192         if (!has_loopback_gain(phy)) {
 193                 radio_pctl_reg = 6;
 194                 trsw_rx = 2;
 195                 pga = 0;
 196         } else {
 197                 int lb_gain;    /* Loopback gain (in dB) */
 198
 199                 trsw_rx = 0;
 200                 lb_gain = gphy->max_lb_gain / 2;
 201                 if (lb_gain > 10) {
 202                         radio_pctl_reg = 0;
 203                         pga = abs(10 - lb_gain) / 6;
 204                         pga = clamp_val(pga, 0, 15);
 205                 } else {
 206                         int cmp_val;
 207                         int tmp;
 208
 209                         pga = 0;
 210                         cmp_val = 0x24;
 211                         if ((phy->rev >= 2) &&
 212                             (phy->radio_ver == 0x2050) && (phy->radio_rev == 8))
 213                                 cmp_val = 0x3C;
 214                         tmp = lb_gain;
 215                         if ((10 - lb_gain) < cmp_val)
 216                                 tmp = (10 - lb_gain);
 217                         if (tmp < 0)
 218                                 tmp += 6;
 219                         else
 220                                 tmp += 3;
 221                         cmp_val /= 4;
 222                         tmp /= 4;
 223                         if (tmp >= cmp_val)
 224                                 radio_pctl_reg = cmp_val;
 225                         else
 226                                 radio_pctl_reg = tmp;
 227                 }
 228         }
 229         b43_radio_maskset(dev, 0x43, 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_maskset(dev, 0x52, 0xFF0F, tx_magn);
 245                         for (j = 0; j < ARRAY_SIZE(tx_bias_values); j++) {
 246                                 tx_bias = tx_bias_values[j];
 247                                 b43_radio_maskset(dev, 0x52, 0xFFF0, tx_bias);
 248                                 feedthrough =
 249                                     lo_measure_feedthrough(dev, 0, pga,
 250                                                            trsw_rx);
 251                                 if (feedthrough < min_feedth) {
 252                                         lo->tx_bias = tx_bias;
 253                                         lo->tx_magn = tx_magn;
 254                                         min_feedth = feedthrough;
 255                                 }
 256                                 if (lo->tx_bias == 0)
 257                                         break;
 258                         }
 259                         b43_radio_write16(dev, 0x52,
 260                                           (b43_radio_read16(dev, 0x52)
 261                                            & 0xFF00) | lo->tx_bias | lo->
 262                                           tx_magn);
 263                 }
 264         } else {
 265                 lo->tx_magn = 0;
 266                 lo->tx_bias = 0;
 267                 b43_radio_mask(dev, 0x52, 0xFFF0);      /* TX bias == 0 */
 268         }
 269         lo->txctl_measured_time = jiffies;
 270 }
 271
 272 static void lo_read_power_vector(struct b43_wldev *dev)
 273 {
 274         struct b43_phy *phy = &dev->phy;
 275         struct b43_phy_g *gphy = phy->g;
 276         struct b43_txpower_lo_control *lo = gphy->lo_control;
 277         int i;
 278         u64 tmp;
 279         u64 power_vector = 0;
 280
 281         for (i = 0; i < 8; i += 2) {
 282                 tmp = b43_shm_read16(dev, B43_SHM_SHARED, 0x310 + i);
 283                 power_vector |= (tmp << (i * 8));
 284                 /* Clear the vector on the device. */
 285                 b43_shm_write16(dev, B43_SHM_SHARED, 0x310 + i, 0);
 286         }
 287         if (power_vector)
 288                 lo->power_vector = power_vector;
 289         lo->pwr_vec_read_time = jiffies;
 290 }
 291
 292 /* 802.11/LO/GPHY/MeasuringGains */
 293 static void lo_measure_gain_values(struct b43_wldev *dev,
 294                                    s16 max_rx_gain, int use_trsw_rx)
 295 {
 296         struct b43_phy *phy = &dev->phy;
 297         struct b43_phy_g *gphy = phy->g;
 298         u16 tmp;
 299
 300         if (max_rx_gain < 0)
 301                 max_rx_gain = 0;
 302
 303         if (has_loopback_gain(phy)) {
 304                 int trsw_rx = 0;
 305                 int trsw_rx_gain;
 306
 307                 if (use_trsw_rx) {
 308                         trsw_rx_gain = gphy->trsw_rx_gain / 2;
 309                         if (max_rx_gain >= trsw_rx_gain) {
 310                                 trsw_rx_gain = max_rx_gain - trsw_rx_gain;
 311                                 trsw_rx = 0x20;
 312                         }
 313                 } else
 314                         trsw_rx_gain = max_rx_gain;
 315                 if (trsw_rx_gain < 9) {
 316                         gphy->lna_lod_gain = 0;
 317                 } else {
 318                         gphy->lna_lod_gain = 1;
 319                         trsw_rx_gain -= 8;
 320                 }
 321                 trsw_rx_gain = clamp_val(trsw_rx_gain, 0, 0x2D);
 322                 gphy->pga_gain = trsw_rx_gain / 3;
 323                 if (gphy->pga_gain >= 5) {
 324                         gphy->pga_gain -= 5;
 325                         gphy->lna_gain = 2;
 326                 } else
 327                         gphy->lna_gain = 0;
 328         } else {
 329                 gphy->lna_gain = 0;
 330                 gphy->trsw_rx_gain = 0x20;
 331                 if (max_rx_gain >= 0x14) {
 332                         gphy->lna_lod_gain = 1;
 333                         gphy->pga_gain = 2;
 334                 } else if (max_rx_gain >= 0x12) {
 335                         gphy->lna_lod_gain = 1;
 336                         gphy->pga_gain = 1;
 337                 } else if (max_rx_gain >= 0xF) {
 338                         gphy->lna_lod_gain = 1;
 339                         gphy->pga_gain = 0;
 340                 } else {
 341                         gphy->lna_lod_gain = 0;
 342                         gphy->pga_gain = 0;
 343                 }
 344         }
 345
 346         tmp = b43_radio_read16(dev, 0x7A);
 347         if (gphy->lna_lod_gain == 0)
 348                 tmp &= ~0x0008;
 349         else
 350                 tmp |= 0x0008;
 351         b43_radio_write16(dev, 0x7A, tmp);
 352 }
 353
 354 struct lo_g_saved_values {
 355         u8 old_channel;
 356
 357         /* Core registers */
 358         u16 reg_3F4;
 359         u16 reg_3E2;
 360
 361         /* PHY registers */
 362         u16 phy_lo_mask;
 363         u16 phy_extg_01;
 364         u16 phy_dacctl_hwpctl;
 365         u16 phy_dacctl;
 366         u16 phy_cck_14;
 367         u16 phy_hpwr_tssictl;
 368         u16 phy_analogover;
 369         u16 phy_analogoverval;
 370         u16 phy_rfover;
 371         u16 phy_rfoverval;
 372         u16 phy_classctl;
 373         u16 phy_cck_3E;
 374         u16 phy_crs0;
 375         u16 phy_pgactl;
 376         u16 phy_cck_2A;
 377         u16 phy_syncctl;
 378         u16 phy_cck_30;
 379         u16 phy_cck_06;
 380
 381         /* Radio registers */
 382         u16 radio_43;
 383         u16 radio_7A;
 384         u16 radio_52;
 385 };
 386
 387 static void lo_measure_setup(struct b43_wldev *dev,
 388                              struct lo_g_saved_values *sav)
 389 {
 390         struct ssb_sprom *sprom = &dev->sdev->bus->sprom;
 391         struct b43_phy *phy = &dev->phy;
 392         struct b43_phy_g *gphy = phy->g;
 393         struct b43_txpower_lo_control *lo = gphy->lo_control;
 394         u16 tmp;
 395
 396         if (b43_has_hardware_pctl(dev)) {
 397                 sav->phy_lo_mask = b43_phy_read(dev, B43_PHY_LO_MASK);
 398                 sav->phy_extg_01 = b43_phy_read(dev, B43_PHY_EXTG(0x01));
 399                 sav->phy_dacctl_hwpctl = b43_phy_read(dev, B43_PHY_DACCTL);
 400                 sav->phy_cck_14 = b43_phy_read(dev, B43_PHY_CCK(0x14));
 401                 sav->phy_hpwr_tssictl = b43_phy_read(dev, B43_PHY_HPWR_TSSICTL);
 402
 403                 b43_phy_set(dev, B43_PHY_HPWR_TSSICTL, 0x100);
 404                 b43_phy_set(dev, B43_PHY_EXTG(0x01), 0x40);
 405                 b43_phy_set(dev, B43_PHY_DACCTL, 0x40);
 406                 b43_phy_set(dev, B43_PHY_CCK(0x14), 0x200);
 407         }
 408         if (phy->type == B43_PHYTYPE_B &&
 409             phy->radio_ver == 0x2050 && phy->radio_rev < 6) {
 410                 b43_phy_write(dev, B43_PHY_CCK(0x16), 0x410);
 411                 b43_phy_write(dev, B43_PHY_CCK(0x17), 0x820);
 412         }
 413         if (phy->rev >= 2) {
 414                 sav->phy_analogover = b43_phy_read(dev, B43_PHY_ANALOGOVER);
 415                 sav->phy_analogoverval =
 416                     b43_phy_read(dev, B43_PHY_ANALOGOVERVAL);
 417                 sav->phy_rfover = b43_phy_read(dev, B43_PHY_RFOVER);
 418                 sav->phy_rfoverval = b43_phy_read(dev, B43_PHY_RFOVERVAL);
 419                 sav->phy_classctl = b43_phy_read(dev, B43_PHY_CLASSCTL);
 420                 sav->phy_cck_3E = b43_phy_read(dev, B43_PHY_CCK(0x3E));
 421                 sav->phy_crs0 = b43_phy_read(dev, B43_PHY_CRS0);
 422
 423                 b43_phy_mask(dev, B43_PHY_CLASSCTL, 0xFFFC);
 424                 b43_phy_mask(dev, B43_PHY_CRS0, 0x7FFF);
 425                 b43_phy_set(dev, B43_PHY_ANALOGOVER, 0x0003);
 426                 b43_phy_mask(dev, B43_PHY_ANALOGOVERVAL, 0xFFFC);
 427                 if (phy->type == B43_PHYTYPE_G) {
 428                         if ((phy->rev >= 7) &&
 429                             (sprom->boardflags_lo & B43_BFL_EXTLNA)) {
 430                                 b43_phy_write(dev, B43_PHY_RFOVER, 0x933);
 431                         } else {
 432                                 b43_phy_write(dev, B43_PHY_RFOVER, 0x133);
 433                         }
 434                 } else {
 435                         b43_phy_write(dev, B43_PHY_RFOVER, 0);
 436                 }
 437                 b43_phy_write(dev, B43_PHY_CCK(0x3E), 0);
 438         }
 439         sav->reg_3F4 = b43_read16(dev, 0x3F4);
 440         sav->reg_3E2 = b43_read16(dev, 0x3E2);
 441         sav->radio_43 = b43_radio_read16(dev, 0x43);
 442         sav->radio_7A = b43_radio_read16(dev, 0x7A);
 443         sav->phy_pgactl = b43_phy_read(dev, B43_PHY_PGACTL);
 444         sav->phy_cck_2A = b43_phy_read(dev, B43_PHY_CCK(0x2A));
 445         sav->phy_syncctl = b43_phy_read(dev, B43_PHY_SYNCCTL);
 446         sav->phy_dacctl = b43_phy_read(dev, B43_PHY_DACCTL);
 447
 448         if (!has_tx_magnification(phy)) {
 449                 sav->radio_52 = b43_radio_read16(dev, 0x52);
 450                 sav->radio_52 &= 0x00F0;
 451         }
 452         if (phy->type == B43_PHYTYPE_B) {
 453                 sav->phy_cck_30 = b43_phy_read(dev, B43_PHY_CCK(0x30));
 454                 sav->phy_cck_06 = b43_phy_read(dev, B43_PHY_CCK(0x06));
 455                 b43_phy_write(dev, B43_PHY_CCK(0x30), 0x00FF);
 456                 b43_phy_write(dev, B43_PHY_CCK(0x06), 0x3F3F);
 457         } else {
 458                 b43_write16(dev, 0x3E2, b43_read16(dev, 0x3E2)
 459                             | 0x8000);
 460         }
 461         b43_write16(dev, 0x3F4, b43_read16(dev, 0x3F4)
 462                     & 0xF000);
 463
 464         tmp =
 465             (phy->type == B43_PHYTYPE_G) ? B43_PHY_LO_MASK : B43_PHY_CCK(0x2E);
 466         b43_phy_write(dev, tmp, 0x007F);
 467
 468         tmp = sav->phy_syncctl;
 469         b43_phy_write(dev, B43_PHY_SYNCCTL, tmp & 0xFF7F);
 470         tmp = sav->radio_7A;
 471         b43_radio_write16(dev, 0x007A, tmp & 0xFFF0);
 472
 473         b43_phy_write(dev, B43_PHY_CCK(0x2A), 0x8A3);
 474         if (phy->type == B43_PHYTYPE_G ||
 475             (phy->type == B43_PHYTYPE_B &&
 476              phy->radio_ver == 0x2050 && phy->radio_rev >= 6)) {
 477                 b43_phy_write(dev, B43_PHY_CCK(0x2B), 0x1003);
 478         } else
 479                 b43_phy_write(dev, B43_PHY_CCK(0x2B), 0x0802);
 480         if (phy->rev >= 2)
 481                 b43_dummy_transmission(dev, false, true);
 482         b43_gphy_channel_switch(dev, 6, 0);
 483         b43_radio_read16(dev, 0x51);    /* dummy read */
 484         if (phy->type == B43_PHYTYPE_G)
 485                 b43_phy_write(dev, B43_PHY_CCK(0x2F), 0);
 486
 487         /* Re-measure the txctl values, if needed. */
 488         if (time_before(lo->txctl_measured_time,
 489                         jiffies - B43_LO_TXCTL_EXPIRE))
 490                 lo_measure_txctl_values(dev);
 491
 492         if (phy->type == B43_PHYTYPE_G && phy->rev >= 3) {
 493                 b43_phy_write(dev, B43_PHY_LO_MASK, 0xC078);
 494         } else {
 495                 if (phy->type == B43_PHYTYPE_B)
 496                         b43_phy_write(dev, B43_PHY_CCK(0x2E), 0x8078);
 497                 else
 498                         b43_phy_write(dev, B43_PHY_LO_MASK, 0x8078);
 499         }
 500 }
 501
 502 static void lo_measure_restore(struct b43_wldev *dev,
 503                                struct lo_g_saved_values *sav)
 504 {
 505         struct b43_phy *phy = &dev->phy;
 506         struct b43_phy_g *gphy = phy->g;
 507         u16 tmp;
 508
 509         if (phy->rev >= 2) {
 510                 b43_phy_write(dev, B43_PHY_PGACTL, 0xE300);
 511                 tmp = (gphy->pga_gain << 8);
 512                 b43_phy_write(dev, B43_PHY_RFOVERVAL, tmp | 0xA0);
 513                 udelay(5);
 514                 b43_phy_write(dev, B43_PHY_RFOVERVAL, tmp | 0xA2);
 515                 udelay(2);
 516                 b43_phy_write(dev, B43_PHY_RFOVERVAL, tmp | 0xA3);
 517         } else {
 518                 tmp = (gphy->pga_gain | 0xEFA0);
 519                 b43_phy_write(dev, B43_PHY_PGACTL, tmp);
 520         }
 521         if (phy->type == B43_PHYTYPE_G) {
 522                 if (phy->rev >= 3)
 523                         b43_phy_write(dev, B43_PHY_CCK(0x2E), 0xC078);
 524                 else
 525                         b43_phy_write(dev, B43_PHY_CCK(0x2E), 0x8078);
 526                 if (phy->rev >= 2)
 527                         b43_phy_write(dev, B43_PHY_CCK(0x2F), 0x0202);
 528                 else
 529                         b43_phy_write(dev, B43_PHY_CCK(0x2F), 0x0101);
 530         }
 531         b43_write16(dev, 0x3F4, sav->reg_3F4);
 532         b43_phy_write(dev, B43_PHY_PGACTL, sav->phy_pgactl);
 533         b43_phy_write(dev, B43_PHY_CCK(0x2A), sav->phy_cck_2A);
 534         b43_phy_write(dev, B43_PHY_SYNCCTL, sav->phy_syncctl);
 535         b43_phy_write(dev, B43_PHY_DACCTL, sav->phy_dacctl);
 536         b43_radio_write16(dev, 0x43, sav->radio_43);
 537         b43_radio_write16(dev, 0x7A, sav->radio_7A);
 538         if (!has_tx_magnification(phy)) {
 539                 tmp = sav->radio_52;
 540                 b43_radio_maskset(dev, 0x52, 0xFF0F, tmp);
 541         }
 542         b43_write16(dev, 0x3E2, sav->reg_3E2);
 543         if (phy->type == B43_PHYTYPE_B &&
 544             phy->radio_ver == 0x2050 && phy->radio_rev <= 5) {
 545                 b43_phy_write(dev, B43_PHY_CCK(0x30), sav->phy_cck_30);
 546                 b43_phy_write(dev, B43_PHY_CCK(0x06), sav->phy_cck_06);
 547         }
 548         if (phy->rev >= 2) {
 549                 b43_phy_write(dev, B43_PHY_ANALOGOVER, sav->phy_analogover);
 550                 b43_phy_write(dev, B43_PHY_ANALOGOVERVAL,
 551                               sav->phy_analogoverval);
 552                 b43_phy_write(dev, B43_PHY_CLASSCTL, sav->phy_classctl);
 553                 b43_phy_write(dev, B43_PHY_RFOVER, sav->phy_rfover);
 554                 b43_phy_write(dev, B43_PHY_RFOVERVAL, sav->phy_rfoverval);
 555                 b43_phy_write(dev, B43_PHY_CCK(0x3E), sav->phy_cck_3E);
 556                 b43_phy_write(dev, B43_PHY_CRS0, sav->phy_crs0);
 557         }
 558         if (b43_has_hardware_pctl(dev)) {
 559                 tmp = (sav->phy_lo_mask & 0xBFFF);
 560                 b43_phy_write(dev, B43_PHY_LO_MASK, tmp);
 561                 b43_phy_write(dev, B43_PHY_EXTG(0x01), sav->phy_extg_01);
 562                 b43_phy_write(dev, B43_PHY_DACCTL, sav->phy_dacctl_hwpctl);
 563                 b43_phy_write(dev, B43_PHY_CCK(0x14), sav->phy_cck_14);
 564                 b43_phy_write(dev, B43_PHY_HPWR_TSSICTL, sav->phy_hpwr_tssictl);
 565         }
 566         b43_gphy_channel_switch(dev, sav->old_channel, 1);
 567 }
 568
 569 struct b43_lo_g_statemachine {
 570         int current_state;
 571         int nr_measured;
 572         int state_val_multiplier;
 573         u16 lowest_feedth;
 574         struct b43_loctl min_loctl;
 575 };
 576
 577 /* Loop over each possible value in this state. */
 578 static int lo_probe_possible_loctls(struct b43_wldev *dev,
 579                                     struct b43_loctl *probe_loctl,
 580                                     struct b43_lo_g_statemachine *d)
 581 {
 582         struct b43_phy *phy = &dev->phy;
 583         struct b43_phy_g *gphy = phy->g;
 584         struct b43_loctl test_loctl;
 585         struct b43_loctl orig_loctl;
 586         struct b43_loctl prev_loctl = {
 587                 .i = -100,
 588                 .q = -100,
 589         };
 590         int i;
 591         int begin, end;
 592         int found_lower = 0;
 593         u16 feedth;
 594
 595         static const struct b43_loctl modifiers[] = {
 596                 {.i = 1,.q = 1,},
 597                 {.i = 1,.q = 0,},
 598                 {.i = 1,.q = -1,},
 599                 {.i = 0,.q = -1,},
 600                 {.i = -1,.q = -1,},
 601                 {.i = -1,.q = 0,},
 602                 {.i = -1,.q = 1,},
 603                 {.i = 0,.q = 1,},
 604         };
 605
 606         if (d->current_state == 0) {
 607                 begin = 1;
 608                 end = 8;
 609         } else if (d->current_state % 2 == 0) {
 610                 begin = d->current_state - 1;
 611                 end = d->current_state + 1;
 612         } else {
 613                 begin = d->current_state - 2;
 614                 end = d->current_state + 2;
 615         }
 616         if (begin < 1)
 617                 begin += 8;
 618         if (end > 8)
 619                 end -= 8;
 620
 621         memcpy(&orig_loctl, probe_loctl, sizeof(struct b43_loctl));
 622         i = begin;
 623         d->current_state = i;
 624         while (1) {
 625                 B43_WARN_ON(!(i >= 1 && i <= 8));
 626                 memcpy(&test_loctl, &orig_loctl, sizeof(struct b43_loctl));
 627                 test_loctl.i += modifiers[i - 1].i * d->state_val_multiplier;
 628                 test_loctl.q += modifiers[i - 1].q * d->state_val_multiplier;
 629                 if ((test_loctl.i != prev_loctl.i ||
 630                      test_loctl.q != prev_loctl.q) &&
 631                     (abs(test_loctl.i) <= 16 && abs(test_loctl.q) <= 16)) {
 632                         b43_lo_write(dev, &test_loctl);
 633                         feedth = lo_measure_feedthrough(dev, gphy->lna_gain,
 634                                                         gphy->pga_gain,
 635                                                         gphy->trsw_rx_gain);
 636                         if (feedth < d->lowest_feedth) {
 637                                 memcpy(probe_loctl, &test_loctl,
 638                                        sizeof(struct b43_loctl));
 639                                 found_lower = 1;
 640                                 d->lowest_feedth = feedth;
 641                                 if ((d->nr_measured < 2) &&
 642                                     !has_loopback_gain(phy))
 643                                         break;
 644                         }
 645                 }
 646                 memcpy(&prev_loctl, &test_loctl, sizeof(prev_loctl));
 647                 if (i == end)
 648                         break;
 649                 if (i == 8)
 650                         i = 1;
 651                 else
 652                         i++;
 653                 d->current_state = i;
 654         }
 655
 656         return found_lower;
 657 }
 658
 659 static void lo_probe_loctls_statemachine(struct b43_wldev *dev,
 660                                          struct b43_loctl *loctl,
 661                                          int *max_rx_gain)
 662 {
 663         struct b43_phy *phy = &dev->phy;
 664         struct b43_phy_g *gphy = phy->g;
 665         struct b43_lo_g_statemachine d;
 666         u16 feedth;
 667         int found_lower;
 668         struct b43_loctl probe_loctl;
 669         int max_repeat = 1, repeat_cnt = 0;
 670
 671         d.nr_measured = 0;
 672         d.state_val_multiplier = 1;
 673         if (has_loopback_gain(phy))
 674                 d.state_val_multiplier = 3;
 675
 676         memcpy(&d.min_loctl, loctl, sizeof(struct b43_loctl));
 677         if (has_loopback_gain(phy))
 678                 max_repeat = 4;
 679         do {
 680                 b43_lo_write(dev, &d.min_loctl);
 681                 feedth = lo_measure_feedthrough(dev, gphy->lna_gain,
 682                                                 gphy->pga_gain,
 683                                                 gphy->trsw_rx_gain);
 684                 if (feedth < 0x258) {
 685                         if (feedth >= 0x12C)
 686                                 *max_rx_gain += 6;
 687                         else
 688                                 *max_rx_gain += 3;
 689                         feedth = lo_measure_feedthrough(dev, gphy->lna_gain,
 690                                                         gphy->pga_gain,
 691                                                         gphy->trsw_rx_gain);
 692                 }
 693                 d.lowest_feedth = feedth;
 694
 695                 d.current_state = 0;
 696                 do {
 697                         B43_WARN_ON(!
 698                                     (d.current_state >= 0
 699                                      && d.current_state <= 8));
 700                         memcpy(&probe_loctl, &d.min_loctl,
 701                                sizeof(struct b43_loctl));
 702                         found_lower =
 703                             lo_probe_possible_loctls(dev, &probe_loctl, &d);
 704                         if (!found_lower)
 705                                 break;
 706                         if ((probe_loctl.i == d.min_loctl.i) &&
 707                             (probe_loctl.q == d.min_loctl.q))
 708                                 break;
 709                         memcpy(&d.min_loctl, &probe_loctl,
 710                                sizeof(struct b43_loctl));
 711                         d.nr_measured++;
 712                 } while (d.nr_measured < 24);
 713                 memcpy(loctl, &d.min_loctl, sizeof(struct b43_loctl));
 714
 715                 if (has_loopback_gain(phy)) {
 716                         if (d.lowest_feedth > 0x1194)
 717                                 *max_rx_gain -= 6;
 718                         else if (d.lowest_feedth < 0x5DC)
 719                                 *max_rx_gain += 3;
 720                         if (repeat_cnt == 0) {
 721                                 if (d.lowest_feedth <= 0x5DC) {
 722                                         d.state_val_multiplier = 1;
 723                                         repeat_cnt++;
 724                                 } else
 725                                         d.state_val_multiplier = 2;
 726                         } else if (repeat_cnt == 2)
 727                                 d.state_val_multiplier = 1;
 728                 }
 729                 lo_measure_gain_values(dev, *max_rx_gain,
 730                                        has_loopback_gain(phy));
 731         } while (++repeat_cnt < max_repeat);
 732 }
 733
 734 static
 735 struct b43_lo_calib *b43_calibrate_lo_setting(struct b43_wldev *dev,
 736                                               const struct b43_bbatt *bbatt,
 737                                               const struct b43_rfatt *rfatt)
 738 {
 739         struct b43_phy *phy = &dev->phy;
 740         struct b43_phy_g *gphy = phy->g;
 741         struct b43_loctl loctl = {
 742                 .i = 0,
 743                 .q = 0,
 744         };
 745         int max_rx_gain;
 746         struct b43_lo_calib *cal;
 747         struct lo_g_saved_values uninitialized_var(saved_regs);
 748         /* Values from the "TXCTL Register and Value Table" */
 749         u16 txctl_reg;
 750         u16 txctl_value;
 751         u16 pad_mix_gain;
 752
 753         saved_regs.old_channel = phy->channel;
 754         b43_mac_suspend(dev);
 755         lo_measure_setup(dev, &saved_regs);
 756
 757         txctl_reg = lo_txctl_register_table(dev, &txctl_value, &pad_mix_gain);
 758
 759         b43_radio_maskset(dev, 0x43, 0xFFF0, rfatt->att);
 760         b43_radio_maskset(dev, txctl_reg, ~txctl_value, (rfatt->with_padmix ? txctl_value :0));
 761
 762         max_rx_gain = rfatt->att * 2;
 763         max_rx_gain += bbatt->att / 2;
 764         if (rfatt->with_padmix)
 765                 max_rx_gain -= pad_mix_gain;
 766         if (has_loopback_gain(phy))
 767                 max_rx_gain += gphy->max_lb_gain;
 768         lo_measure_gain_values(dev, max_rx_gain,
 769                                has_loopback_gain(phy));
 770
 771         b43_gphy_set_baseband_attenuation(dev, bbatt->att);
 772         lo_probe_loctls_statemachine(dev, &loctl, &max_rx_gain);
 773
 774         lo_measure_restore(dev, &saved_regs);
 775         b43_mac_enable(dev);
 776
 777         if (b43_debug(dev, B43_DBG_LO)) {
 778                 b43dbg(dev->wl, "LO: Calibrated for BB(%u), RF(%u,%u) "
 779                        "=> I=%d Q=%d\n",
 780                        bbatt->att, rfatt->att, rfatt->with_padmix,
 781                        loctl.i, loctl.q);
 782         }
 783
 784         cal = kmalloc(sizeof(*cal), GFP_KERNEL);
 785         if (!cal) {
 786                 b43warn(dev->wl, "LO calib: out of memory\n");
 787                 return NULL;
 788         }
 789         memcpy(&cal->bbatt, bbatt, sizeof(*bbatt));
 790         memcpy(&cal->rfatt, rfatt, sizeof(*rfatt));
 791         memcpy(&cal->ctl, &loctl, sizeof(loctl));
 792         cal->calib_time = jiffies;
 793         INIT_LIST_HEAD(&cal->list);
 794
 795         return cal;
 796 }
 797
 798 /* Get a calibrated LO setting for the given attenuation values.
 799  * Might return a NULL pointer under OOM! */
 800 static
 801 struct b43_lo_calib *b43_get_calib_lo_settings(struct b43_wldev *dev,
 802                                                const struct b43_bbatt *bbatt,
 803                                                const struct b43_rfatt *rfatt)
 804 {
 805         struct b43_txpower_lo_control *lo = dev->phy.g->lo_control;
 806         struct b43_lo_calib *c;
 807
 808         c = b43_find_lo_calib(lo, bbatt, rfatt);
 809         if (c)
 810                 return c;
 811         /* Not in the list of calibrated LO settings.
 812          * Calibrate it now. */
 813         c = b43_calibrate_lo_setting(dev, bbatt, rfatt);
 814         if (!c)
 815                 return NULL;
 816         list_add(&c->list, &lo->calib_list);
 817
 818         return c;
 819 }
 820
 821 void b43_gphy_dc_lt_init(struct b43_wldev *dev, bool update_all)
 822 {
 823         struct b43_phy *phy = &dev->phy;
 824         struct b43_phy_g *gphy = phy->g;
 825         struct b43_txpower_lo_control *lo = gphy->lo_control;
 826         int i;
 827         int rf_offset, bb_offset;
 828         const struct b43_rfatt *rfatt;
 829         const struct b43_bbatt *bbatt;
 830         u64 power_vector;
 831         bool table_changed = 0;
 832
 833         BUILD_BUG_ON(B43_DC_LT_SIZE != 32);
 834         B43_WARN_ON(lo->rfatt_list.len * lo->bbatt_list.len > 64);
 835
 836         power_vector = lo->power_vector;
 837         if (!update_all && !power_vector)
 838                 return; /* Nothing to do. */
 839
 840         /* Suspend the MAC now to avoid continuous suspend/enable
 841          * cycles in the loop. */
 842         b43_mac_suspend(dev);
 843
 844         for (i = 0; i < B43_DC_LT_SIZE * 2; i++) {
 845                 struct b43_lo_calib *cal;
 846                 int idx;
 847                 u16 val;
 848
 849                 if (!update_all && !(power_vector & (((u64)1ULL) << i)))
 850                         continue;
 851                 /* Update the table entry for this power_vector bit.
 852                  * The table rows are RFatt entries and columns are BBatt. */
 853                 bb_offset = i / lo->rfatt_list.len;
 854                 rf_offset = i % lo->rfatt_list.len;
 855                 bbatt = &(lo->bbatt_list.list[bb_offset]);
 856                 rfatt = &(lo->rfatt_list.list[rf_offset]);
 857
 858                 cal = b43_calibrate_lo_setting(dev, bbatt, rfatt);
 859                 if (!cal) {
 860                         b43warn(dev->wl, "LO: Could not "
 861                                 "calibrate DC table entry\n");
 862                         continue;
 863                 }
 864                 /*FIXME: Is Q really in the low nibble? */
 865                 val = (u8)(cal->ctl.q);
 866                 val |= ((u8)(cal->ctl.i)) << 4;
 867                 kfree(cal);
 868
 869                 /* Get the index into the hardware DC LT. */
 870                 idx = i / 2;
 871                 /* Change the table in memory. */
 872                 if (i % 2) {
 873                         /* Change the high byte. */
 874                         lo->dc_lt[idx] = (lo->dc_lt[idx] & 0x00FF)
 875                                          | ((val & 0x00FF) << 8);
 876                 } else {
 877                         /* Change the low byte. */
 878                         lo->dc_lt[idx] = (lo->dc_lt[idx] & 0xFF00)
 879                                          | (val & 0x00FF);
 880                 }
 881                 table_changed = 1;
 882         }
 883         if (table_changed) {
 884                 /* The table changed in memory. Update the hardware table. */
 885                 for (i = 0; i < B43_DC_LT_SIZE; i++)
 886                         b43_phy_write(dev, 0x3A0 + i, lo->dc_lt[i]);
 887         }
 888         b43_mac_enable(dev);
 889 }
 890
 891 /* Fixup the RF attenuation value for the case where we are
 892  * using the PAD mixer. */
 893 static inline void b43_lo_fixup_rfatt(struct b43_rfatt *rf)
 894 {
 895         if (!rf->with_padmix)
 896                 return;
 897         if ((rf->att != 1) && (rf->att != 2) && (rf->att != 3))
 898                 rf->att = 4;
 899 }
 900
 901 void b43_lo_g_adjust(struct b43_wldev *dev)
 902 {
 903         struct b43_phy_g *gphy = dev->phy.g;
 904         struct b43_lo_calib *cal;
 905         struct b43_rfatt rf;
 906
 907         memcpy(&rf, &gphy->rfatt, sizeof(rf));
 908         b43_lo_fixup_rfatt(&rf);
 909
 910         cal = b43_get_calib_lo_settings(dev, &gphy->bbatt, &rf);
 911         if (!cal)
 912                 return;
 913         b43_lo_write(dev, &cal->ctl);
 914 }
 915
 916 void b43_lo_g_adjust_to(struct b43_wldev *dev,
 917                         u16 rfatt, u16 bbatt, u16 tx_control)
 918 {
 919         struct b43_rfatt rf;
 920         struct b43_bbatt bb;
 921         struct b43_lo_calib *cal;
 922
 923         memset(&rf, 0, sizeof(rf));
 924         memset(&bb, 0, sizeof(bb));
 925         rf.att = rfatt;
 926         bb.att = bbatt;
 927         b43_lo_fixup_rfatt(&rf);
 928         cal = b43_get_calib_lo_settings(dev, &bb, &rf);
 929         if (!cal)
 930                 return;
 931         b43_lo_write(dev, &cal->ctl);
 932 }
 933
 934 /* Periodic LO maintanance work */
 935 void b43_lo_g_maintanance_work(struct b43_wldev *dev)
 936 {
 937         struct b43_phy *phy = &dev->phy;
 938         struct b43_phy_g *gphy = phy->g;
 939         struct b43_txpower_lo_control *lo = gphy->lo_control;
 940         unsigned long now;
 941         unsigned long expire;
 942         struct b43_lo_calib *cal, *tmp;
 943         bool current_item_expired = 0;
 944         bool hwpctl;
 945
 946         if (!lo)
 947                 return;
 948         now = jiffies;
 949         hwpctl = b43_has_hardware_pctl(dev);
 950
 951         if (hwpctl) {
 952                 /* Read the power vector and update it, if needed. */
 953                 expire = now - B43_LO_PWRVEC_EXPIRE;
 954                 if (time_before(lo->pwr_vec_read_time, expire)) {
 955                         lo_read_power_vector(dev);
 956                         b43_gphy_dc_lt_init(dev, 0);
 957                 }
 958                 //FIXME Recalc the whole DC table from time to time?
 959         }
 960
 961         if (hwpctl)
 962                 return;
 963         /* Search for expired LO settings. Remove them.
 964          * Recalibrate the current setting, if expired. */
 965         expire = now - B43_LO_CALIB_EXPIRE;
 966         list_for_each_entry_safe(cal, tmp, &lo->calib_list, list) {
 967                 if (!time_before(cal->calib_time, expire))
 968                         continue;
 969                 /* This item expired. */
 970                 if (b43_compare_bbatt(&cal->bbatt, &gphy->bbatt) &&
 971                     b43_compare_rfatt(&cal->rfatt, &gphy->rfatt)) {
 972                         B43_WARN_ON(current_item_expired);
 973                         current_item_expired = 1;
 974                 }
 975                 if (b43_debug(dev, B43_DBG_LO)) {
 976                         b43dbg(dev->wl, "LO: Item BB(%u), RF(%u,%u), "
 977                                "I=%d, Q=%d expired\n",
 978                                cal->bbatt.att, cal->rfatt.att,
 979                                cal->rfatt.with_padmix,
 980                                cal->ctl.i, cal->ctl.q);
 981                 }
 982                 list_del(&cal->list);
 983                 kfree(cal);
 984         }
 985         if (current_item_expired || unlikely(list_empty(&lo->calib_list))) {
 986                 /* Recalibrate currently used LO setting. */
 987                 if (b43_debug(dev, B43_DBG_LO))
 988                         b43dbg(dev->wl, "LO: Recalibrating current LO setting\n");
 989                 cal = b43_calibrate_lo_setting(dev, &gphy->bbatt, &gphy->rfatt);
 990                 if (cal) {
 991                         list_add(&cal->list, &lo->calib_list);
 992                         b43_lo_write(dev, &cal->ctl);
 993                 } else
 994                         b43warn(dev->wl, "Failed to recalibrate current LO setting\n");
 995         }
 996 }
 997
 998 void b43_lo_g_cleanup(struct b43_wldev *dev)
 999 {
1000         struct b43_txpower_lo_control *lo = dev->phy.g->lo_control;
1001         struct b43_lo_calib *cal, *tmp;
1002
1003         if (!lo)
1004                 return;
1005         list_for_each_entry_safe(cal, tmp, &lo->calib_list, list) {
1006                 list_del(&cal->list);
1007                 kfree(cal);
1008         }
1009 }
1010
1011 /* LO Initialization */
1012 void b43_lo_g_init(struct b43_wldev *dev)
1013 {
1014         if (b43_has_hardware_pctl(dev)) {
1015                 lo_read_power_vector(dev);
1016                 b43_gphy_dc_lt_init(dev, 1);
1017         }
1018 }