linux/drivers/net/wireless/broadcom/b43/lo.c
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   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 <m@bues.ch>
  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
  40static 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. */
  58static 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
  78static 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->dev->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 */
 141static 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
 175static 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
 272static 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 */
 293static 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_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                        }
 311                } else
 312                        trsw_rx_gain = max_rx_gain;
 313                if (trsw_rx_gain < 9) {
 314                        gphy->lna_lod_gain = 0;
 315                } else {
 316                        gphy->lna_lod_gain = 1;
 317                        trsw_rx_gain -= 8;
 318                }
 319                trsw_rx_gain = clamp_val(trsw_rx_gain, 0, 0x2D);
 320                gphy->pga_gain = trsw_rx_gain / 3;
 321                if (gphy->pga_gain >= 5) {
 322                        gphy->pga_gain -= 5;
 323                        gphy->lna_gain = 2;
 324                } else
 325                        gphy->lna_gain = 0;
 326        } else {
 327                gphy->lna_gain = 0;
 328                gphy->trsw_rx_gain = 0x20;
 329                if (max_rx_gain >= 0x14) {
 330                        gphy->lna_lod_gain = 1;
 331                        gphy->pga_gain = 2;
 332                } else if (max_rx_gain >= 0x12) {
 333                        gphy->lna_lod_gain = 1;
 334                        gphy->pga_gain = 1;
 335                } else if (max_rx_gain >= 0xF) {
 336                        gphy->lna_lod_gain = 1;
 337                        gphy->pga_gain = 0;
 338                } else {
 339                        gphy->lna_lod_gain = 0;
 340                        gphy->pga_gain = 0;
 341                }
 342        }
 343
 344        tmp = b43_radio_read16(dev, 0x7A);
 345        if (gphy->lna_lod_gain == 0)
 346                tmp &= ~0x0008;
 347        else
 348                tmp |= 0x0008;
 349        b43_radio_write16(dev, 0x7A, tmp);
 350}
 351
 352struct lo_g_saved_values {
 353        u8 old_channel;
 354
 355        /* Core registers */
 356        u16 reg_3F4;
 357        u16 reg_3E2;
 358
 359        /* PHY registers */
 360        u16 phy_lo_mask;
 361        u16 phy_extg_01;
 362        u16 phy_dacctl_hwpctl;
 363        u16 phy_dacctl;
 364        u16 phy_cck_14;
 365        u16 phy_hpwr_tssictl;
 366        u16 phy_analogover;
 367        u16 phy_analogoverval;
 368        u16 phy_rfover;
 369        u16 phy_rfoverval;
 370        u16 phy_classctl;
 371        u16 phy_cck_3E;
 372        u16 phy_crs0;
 373        u16 phy_pgactl;
 374        u16 phy_cck_2A;
 375        u16 phy_syncctl;
 376        u16 phy_cck_30;
 377        u16 phy_cck_06;
 378
 379        /* Radio registers */
 380        u16 radio_43;
 381        u16 radio_7A;
 382        u16 radio_52;
 383};
 384
 385static void lo_measure_setup(struct b43_wldev *dev,
 386                             struct lo_g_saved_values *sav)
 387{
 388        struct ssb_sprom *sprom = dev->dev->bus_sprom;
 389        struct b43_phy *phy = &dev->phy;
 390        struct b43_phy_g *gphy = phy->g;
 391        struct b43_txpower_lo_control *lo = gphy->lo_control;
 392        u16 tmp;
 393
 394        if (b43_has_hardware_pctl(dev)) {
 395                sav->phy_lo_mask = b43_phy_read(dev, B43_PHY_LO_MASK);
 396                sav->phy_extg_01 = b43_phy_read(dev, B43_PHY_EXTG(0x01));
 397                sav->phy_dacctl_hwpctl = b43_phy_read(dev, B43_PHY_DACCTL);
 398                sav->phy_cck_14 = b43_phy_read(dev, B43_PHY_CCK(0x14));
 399                sav->phy_hpwr_tssictl = b43_phy_read(dev, B43_PHY_HPWR_TSSICTL);
 400
 401                b43_phy_set(dev, B43_PHY_HPWR_TSSICTL, 0x100);
 402                b43_phy_set(dev, B43_PHY_EXTG(0x01), 0x40);
 403                b43_phy_set(dev, B43_PHY_DACCTL, 0x40);
 404                b43_phy_set(dev, B43_PHY_CCK(0x14), 0x200);
 405        }
 406        if (phy->type == B43_PHYTYPE_B &&
 407            phy->radio_ver == 0x2050 && phy->radio_rev < 6) {
 408                b43_phy_write(dev, B43_PHY_CCK(0x16), 0x410);
 409                b43_phy_write(dev, B43_PHY_CCK(0x17), 0x820);
 410        }
 411        if (phy->rev >= 2) {
 412                sav->phy_analogover = b43_phy_read(dev, B43_PHY_ANALOGOVER);
 413                sav->phy_analogoverval =
 414                    b43_phy_read(dev, B43_PHY_ANALOGOVERVAL);
 415                sav->phy_rfover = b43_phy_read(dev, B43_PHY_RFOVER);
 416                sav->phy_rfoverval = b43_phy_read(dev, B43_PHY_RFOVERVAL);
 417                sav->phy_classctl = b43_phy_read(dev, B43_PHY_CLASSCTL);
 418                sav->phy_cck_3E = b43_phy_read(dev, B43_PHY_CCK(0x3E));
 419                sav->phy_crs0 = b43_phy_read(dev, B43_PHY_CRS0);
 420
 421                b43_phy_mask(dev, B43_PHY_CLASSCTL, 0xFFFC);
 422                b43_phy_mask(dev, B43_PHY_CRS0, 0x7FFF);
 423                b43_phy_set(dev, B43_PHY_ANALOGOVER, 0x0003);
 424                b43_phy_mask(dev, B43_PHY_ANALOGOVERVAL, 0xFFFC);
 425                if (phy->type == B43_PHYTYPE_G) {
 426                        if ((phy->rev >= 7) &&
 427                            (sprom->boardflags_lo & B43_BFL_EXTLNA)) {
 428                                b43_phy_write(dev, B43_PHY_RFOVER, 0x933);
 429                        } else {
 430                                b43_phy_write(dev, B43_PHY_RFOVER, 0x133);
 431                        }
 432                } else {
 433                        b43_phy_write(dev, B43_PHY_RFOVER, 0);
 434                }
 435                b43_phy_write(dev, B43_PHY_CCK(0x3E), 0);
 436        }
 437        sav->reg_3F4 = b43_read16(dev, 0x3F4);
 438        sav->reg_3E2 = b43_read16(dev, 0x3E2);
 439        sav->radio_43 = b43_radio_read16(dev, 0x43);
 440        sav->radio_7A = b43_radio_read16(dev, 0x7A);
 441        sav->phy_pgactl = b43_phy_read(dev, B43_PHY_PGACTL);
 442        sav->phy_cck_2A = b43_phy_read(dev, B43_PHY_CCK(0x2A));
 443        sav->phy_syncctl = b43_phy_read(dev, B43_PHY_SYNCCTL);
 444        sav->phy_dacctl = b43_phy_read(dev, B43_PHY_DACCTL);
 445
 446        if (!has_tx_magnification(phy)) {
 447                sav->radio_52 = b43_radio_read16(dev, 0x52);
 448                sav->radio_52 &= 0x00F0;
 449        }
 450        if (phy->type == B43_PHYTYPE_B) {
 451                sav->phy_cck_30 = b43_phy_read(dev, B43_PHY_CCK(0x30));
 452                sav->phy_cck_06 = b43_phy_read(dev, B43_PHY_CCK(0x06));
 453                b43_phy_write(dev, B43_PHY_CCK(0x30), 0x00FF);
 454                b43_phy_write(dev, B43_PHY_CCK(0x06), 0x3F3F);
 455        } else {
 456                b43_write16(dev, 0x3E2, b43_read16(dev, 0x3E2)
 457                            | 0x8000);
 458        }
 459        b43_write16(dev, 0x3F4, b43_read16(dev, 0x3F4)
 460                    & 0xF000);
 461
 462        tmp =
 463            (phy->type == B43_PHYTYPE_G) ? B43_PHY_LO_MASK : B43_PHY_CCK(0x2E);
 464        b43_phy_write(dev, tmp, 0x007F);
 465
 466        tmp = sav->phy_syncctl;
 467        b43_phy_write(dev, B43_PHY_SYNCCTL, tmp & 0xFF7F);
 468        tmp = sav->radio_7A;
 469        b43_radio_write16(dev, 0x007A, tmp & 0xFFF0);
 470
 471        b43_phy_write(dev, B43_PHY_CCK(0x2A), 0x8A3);
 472        if (phy->type == B43_PHYTYPE_G ||
 473            (phy->type == B43_PHYTYPE_B &&
 474             phy->radio_ver == 0x2050 && phy->radio_rev >= 6)) {
 475                b43_phy_write(dev, B43_PHY_CCK(0x2B), 0x1003);
 476        } else
 477                b43_phy_write(dev, B43_PHY_CCK(0x2B), 0x0802);
 478        if (phy->rev >= 2)
 479                b43_dummy_transmission(dev, false, true);
 480        b43_gphy_channel_switch(dev, 6, 0);
 481        b43_radio_read16(dev, 0x51);    /* dummy read */
 482        if (phy->type == B43_PHYTYPE_G)
 483                b43_phy_write(dev, B43_PHY_CCK(0x2F), 0);
 484
 485        /* Re-measure the txctl values, if needed. */
 486        if (time_before(lo->txctl_measured_time,
 487                        jiffies - B43_LO_TXCTL_EXPIRE))
 488                lo_measure_txctl_values(dev);
 489
 490        if (phy->type == B43_PHYTYPE_G && phy->rev >= 3) {
 491                b43_phy_write(dev, B43_PHY_LO_MASK, 0xC078);
 492        } else {
 493                if (phy->type == B43_PHYTYPE_B)
 494                        b43_phy_write(dev, B43_PHY_CCK(0x2E), 0x8078);
 495                else
 496                        b43_phy_write(dev, B43_PHY_LO_MASK, 0x8078);
 497        }
 498}
 499
 500static void lo_measure_restore(struct b43_wldev *dev,
 501                               struct lo_g_saved_values *sav)
 502{
 503        struct b43_phy *phy = &dev->phy;
 504        struct b43_phy_g *gphy = phy->g;
 505        u16 tmp;
 506
 507        if (phy->rev >= 2) {
 508                b43_phy_write(dev, B43_PHY_PGACTL, 0xE300);
 509                tmp = (gphy->pga_gain << 8);
 510                b43_phy_write(dev, B43_PHY_RFOVERVAL, tmp | 0xA0);
 511                udelay(5);
 512                b43_phy_write(dev, B43_PHY_RFOVERVAL, tmp | 0xA2);
 513                udelay(2);
 514                b43_phy_write(dev, B43_PHY_RFOVERVAL, tmp | 0xA3);
 515        } else {
 516                tmp = (gphy->pga_gain | 0xEFA0);
 517                b43_phy_write(dev, B43_PHY_PGACTL, tmp);
 518        }
 519        if (phy->type == B43_PHYTYPE_G) {
 520                if (phy->rev >= 3)
 521                        b43_phy_write(dev, B43_PHY_CCK(0x2E), 0xC078);
 522                else
 523                        b43_phy_write(dev, B43_PHY_CCK(0x2E), 0x8078);
 524                if (phy->rev >= 2)
 525                        b43_phy_write(dev, B43_PHY_CCK(0x2F), 0x0202);
 526                else
 527                        b43_phy_write(dev, B43_PHY_CCK(0x2F), 0x0101);
 528        }
 529        b43_write16(dev, 0x3F4, sav->reg_3F4);
 530        b43_phy_write(dev, B43_PHY_PGACTL, sav->phy_pgactl);
 531        b43_phy_write(dev, B43_PHY_CCK(0x2A), sav->phy_cck_2A);
 532        b43_phy_write(dev, B43_PHY_SYNCCTL, sav->phy_syncctl);
 533        b43_phy_write(dev, B43_PHY_DACCTL, sav->phy_dacctl);
 534        b43_radio_write16(dev, 0x43, sav->radio_43);
 535        b43_radio_write16(dev, 0x7A, sav->radio_7A);
 536        if (!has_tx_magnification(phy)) {
 537                tmp = sav->radio_52;
 538                b43_radio_maskset(dev, 0x52, 0xFF0F, tmp);
 539        }
 540        b43_write16(dev, 0x3E2, sav->reg_3E2);
 541        if (phy->type == B43_PHYTYPE_B &&
 542            phy->radio_ver == 0x2050 && phy->radio_rev <= 5) {
 543                b43_phy_write(dev, B43_PHY_CCK(0x30), sav->phy_cck_30);
 544                b43_phy_write(dev, B43_PHY_CCK(0x06), sav->phy_cck_06);
 545        }
 546        if (phy->rev >= 2) {
 547                b43_phy_write(dev, B43_PHY_ANALOGOVER, sav->phy_analogover);
 548                b43_phy_write(dev, B43_PHY_ANALOGOVERVAL,
 549                              sav->phy_analogoverval);
 550                b43_phy_write(dev, B43_PHY_CLASSCTL, sav->phy_classctl);
 551                b43_phy_write(dev, B43_PHY_RFOVER, sav->phy_rfover);
 552                b43_phy_write(dev, B43_PHY_RFOVERVAL, sav->phy_rfoverval);
 553                b43_phy_write(dev, B43_PHY_CCK(0x3E), sav->phy_cck_3E);
 554                b43_phy_write(dev, B43_PHY_CRS0, sav->phy_crs0);
 555        }
 556        if (b43_has_hardware_pctl(dev)) {
 557                tmp = (sav->phy_lo_mask & 0xBFFF);
 558                b43_phy_write(dev, B43_PHY_LO_MASK, tmp);
 559                b43_phy_write(dev, B43_PHY_EXTG(0x01), sav->phy_extg_01);
 560                b43_phy_write(dev, B43_PHY_DACCTL, sav->phy_dacctl_hwpctl);
 561                b43_phy_write(dev, B43_PHY_CCK(0x14), sav->phy_cck_14);
 562                b43_phy_write(dev, B43_PHY_HPWR_TSSICTL, sav->phy_hpwr_tssictl);
 563        }
 564        b43_gphy_channel_switch(dev, sav->old_channel, 1);
 565}
 566
 567struct b43_lo_g_statemachine {
 568        int current_state;
 569        int nr_measured;
 570        int state_val_multiplier;
 571        u16 lowest_feedth;
 572        struct b43_loctl min_loctl;
 573};
 574
 575/* Loop over each possible value in this state. */
 576static int lo_probe_possible_loctls(struct b43_wldev *dev,
 577                                    struct b43_loctl *probe_loctl,
 578                                    struct b43_lo_g_statemachine *d)
 579{
 580        struct b43_phy *phy = &dev->phy;
 581        struct b43_phy_g *gphy = phy->g;
 582        struct b43_loctl test_loctl;
 583        struct b43_loctl orig_loctl;
 584        struct b43_loctl prev_loctl = {
 585                .i = -100,
 586                .q = -100,
 587        };
 588        int i;
 589        int begin, end;
 590        int found_lower = 0;
 591        u16 feedth;
 592
 593        static const struct b43_loctl modifiers[] = {
 594                {.i = 1,.q = 1,},
 595                {.i = 1,.q = 0,},
 596                {.i = 1,.q = -1,},
 597                {.i = 0,.q = -1,},
 598                {.i = -1,.q = -1,},
 599                {.i = -1,.q = 0,},
 600                {.i = -1,.q = 1,},
 601                {.i = 0,.q = 1,},
 602        };
 603
 604        if (d->current_state == 0) {
 605                begin = 1;
 606                end = 8;
 607        } else if (d->current_state % 2 == 0) {
 608                begin = d->current_state - 1;
 609                end = d->current_state + 1;
 610        } else {
 611                begin = d->current_state - 2;
 612                end = d->current_state + 2;
 613        }
 614        if (begin < 1)
 615                begin += 8;
 616        if (end > 8)
 617                end -= 8;
 618
 619        memcpy(&orig_loctl, probe_loctl, sizeof(struct b43_loctl));
 620        i = begin;
 621        d->current_state = i;
 622        while (1) {
 623                B43_WARN_ON(!(i >= 1 && i <= 8));
 624                memcpy(&test_loctl, &orig_loctl, sizeof(struct b43_loctl));
 625                test_loctl.i += modifiers[i - 1].i * d->state_val_multiplier;
 626                test_loctl.q += modifiers[i - 1].q * d->state_val_multiplier;
 627                if ((test_loctl.i != prev_loctl.i ||
 628                     test_loctl.q != prev_loctl.q) &&
 629                    (abs(test_loctl.i) <= 16 && abs(test_loctl.q) <= 16)) {
 630                        b43_lo_write(dev, &test_loctl);
 631                        feedth = lo_measure_feedthrough(dev, gphy->lna_gain,
 632                                                        gphy->pga_gain,
 633                                                        gphy->trsw_rx_gain);
 634                        if (feedth < d->lowest_feedth) {
 635                                memcpy(probe_loctl, &test_loctl,
 636                                       sizeof(struct b43_loctl));
 637                                found_lower = 1;
 638                                d->lowest_feedth = feedth;
 639                                if ((d->nr_measured < 2) &&
 640                                    !has_loopback_gain(phy))
 641                                        break;
 642                        }
 643                }
 644                memcpy(&prev_loctl, &test_loctl, sizeof(prev_loctl));
 645                if (i == end)
 646                        break;
 647                if (i == 8)
 648                        i = 1;
 649                else
 650                        i++;
 651                d->current_state = i;
 652        }
 653
 654        return found_lower;
 655}
 656
 657static void lo_probe_loctls_statemachine(struct b43_wldev *dev,
 658                                         struct b43_loctl *loctl,
 659                                         int *max_rx_gain)
 660{
 661        struct b43_phy *phy = &dev->phy;
 662        struct b43_phy_g *gphy = phy->g;
 663        struct b43_lo_g_statemachine d;
 664        u16 feedth;
 665        int found_lower;
 666        struct b43_loctl probe_loctl;
 667        int max_repeat = 1, repeat_cnt = 0;
 668
 669        d.nr_measured = 0;
 670        d.state_val_multiplier = 1;
 671        if (has_loopback_gain(phy))
 672                d.state_val_multiplier = 3;
 673
 674        memcpy(&d.min_loctl, loctl, sizeof(struct b43_loctl));
 675        if (has_loopback_gain(phy))
 676                max_repeat = 4;
 677        do {
 678                b43_lo_write(dev, &d.min_loctl);
 679                feedth = lo_measure_feedthrough(dev, gphy->lna_gain,
 680                                                gphy->pga_gain,
 681                                                gphy->trsw_rx_gain);
 682                if (feedth < 0x258) {
 683                        if (feedth >= 0x12C)
 684                                *max_rx_gain += 6;
 685                        else
 686                                *max_rx_gain += 3;
 687                        feedth = lo_measure_feedthrough(dev, gphy->lna_gain,
 688                                                        gphy->pga_gain,
 689                                                        gphy->trsw_rx_gain);
 690                }
 691                d.lowest_feedth = feedth;
 692
 693                d.current_state = 0;
 694                do {
 695                        B43_WARN_ON(!
 696                                    (d.current_state >= 0
 697                                     && d.current_state <= 8));
 698                        memcpy(&probe_loctl, &d.min_loctl,
 699                               sizeof(struct b43_loctl));
 700                        found_lower =
 701                            lo_probe_possible_loctls(dev, &probe_loctl, &d);
 702                        if (!found_lower)
 703                                break;
 704                        if ((probe_loctl.i == d.min_loctl.i) &&
 705                            (probe_loctl.q == d.min_loctl.q))
 706                                break;
 707                        memcpy(&d.min_loctl, &probe_loctl,
 708                               sizeof(struct b43_loctl));
 709                        d.nr_measured++;
 710                } while (d.nr_measured < 24);
 711                memcpy(loctl, &d.min_loctl, sizeof(struct b43_loctl));
 712
 713                if (has_loopback_gain(phy)) {
 714                        if (d.lowest_feedth > 0x1194)
 715                                *max_rx_gain -= 6;
 716                        else if (d.lowest_feedth < 0x5DC)
 717                                *max_rx_gain += 3;
 718                        if (repeat_cnt == 0) {
 719                                if (d.lowest_feedth <= 0x5DC) {
 720                                        d.state_val_multiplier = 1;
 721                                        repeat_cnt++;
 722                                } else
 723                                        d.state_val_multiplier = 2;
 724                        } else if (repeat_cnt == 2)
 725                                d.state_val_multiplier = 1;
 726                }
 727                lo_measure_gain_values(dev, *max_rx_gain,
 728                                       has_loopback_gain(phy));
 729        } while (++repeat_cnt < max_repeat);
 730}
 731
 732static
 733struct b43_lo_calib *b43_calibrate_lo_setting(struct b43_wldev *dev,
 734                                              const struct b43_bbatt *bbatt,
 735                                              const struct b43_rfatt *rfatt)
 736{
 737        struct b43_phy *phy = &dev->phy;
 738        struct b43_phy_g *gphy = phy->g;
 739        struct b43_loctl loctl = {
 740                .i = 0,
 741                .q = 0,
 742        };
 743        int max_rx_gain;
 744        struct b43_lo_calib *cal;
 745        struct lo_g_saved_values uninitialized_var(saved_regs);
 746        /* Values from the "TXCTL Register and Value Table" */
 747        u16 txctl_reg;
 748        u16 txctl_value;
 749        u16 pad_mix_gain;
 750
 751        saved_regs.old_channel = phy->channel;
 752        b43_mac_suspend(dev);
 753        lo_measure_setup(dev, &saved_regs);
 754
 755        txctl_reg = lo_txctl_register_table(dev, &txctl_value, &pad_mix_gain);
 756
 757        b43_radio_maskset(dev, 0x43, 0xFFF0, rfatt->att);
 758        b43_radio_maskset(dev, txctl_reg, ~txctl_value, (rfatt->with_padmix ? txctl_value :0));
 759
 760        max_rx_gain = rfatt->att * 2;
 761        max_rx_gain += bbatt->att / 2;
 762        if (rfatt->with_padmix)
 763                max_rx_gain -= pad_mix_gain;
 764        if (has_loopback_gain(phy))
 765                max_rx_gain += gphy->max_lb_gain;
 766        lo_measure_gain_values(dev, max_rx_gain,
 767                               has_loopback_gain(phy));
 768
 769        b43_gphy_set_baseband_attenuation(dev, bbatt->att);
 770        lo_probe_loctls_statemachine(dev, &loctl, &max_rx_gain);
 771
 772        lo_measure_restore(dev, &saved_regs);
 773        b43_mac_enable(dev);
 774
 775        if (b43_debug(dev, B43_DBG_LO)) {
 776                b43dbg(dev->wl, "LO: Calibrated for BB(%u), RF(%u,%u) "
 777                       "=> I=%d Q=%d\n",
 778                       bbatt->att, rfatt->att, rfatt->with_padmix,
 779                       loctl.i, loctl.q);
 780        }
 781
 782        cal = kmalloc(sizeof(*cal), GFP_KERNEL);
 783        if (!cal) {
 784                b43warn(dev->wl, "LO calib: out of memory\n");
 785                return NULL;
 786        }
 787        memcpy(&cal->bbatt, bbatt, sizeof(*bbatt));
 788        memcpy(&cal->rfatt, rfatt, sizeof(*rfatt));
 789        memcpy(&cal->ctl, &loctl, sizeof(loctl));
 790        cal->calib_time = jiffies;
 791        INIT_LIST_HEAD(&cal->list);
 792
 793        return cal;
 794}
 795
 796/* Get a calibrated LO setting for the given attenuation values.
 797 * Might return a NULL pointer under OOM! */
 798static
 799struct b43_lo_calib *b43_get_calib_lo_settings(struct b43_wldev *dev,
 800                                               const struct b43_bbatt *bbatt,
 801                                               const struct b43_rfatt *rfatt)
 802{
 803        struct b43_txpower_lo_control *lo = dev->phy.g->lo_control;
 804        struct b43_lo_calib *c;
 805
 806        c = b43_find_lo_calib(lo, bbatt, rfatt);
 807        if (c)
 808                return c;
 809        /* Not in the list of calibrated LO settings.
 810         * Calibrate it now. */
 811        c = b43_calibrate_lo_setting(dev, bbatt, rfatt);
 812        if (!c)
 813                return NULL;
 814        list_add(&c->list, &lo->calib_list);
 815
 816        return c;
 817}
 818
 819void b43_gphy_dc_lt_init(struct b43_wldev *dev, bool update_all)
 820{
 821        struct b43_phy *phy = &dev->phy;
 822        struct b43_phy_g *gphy = phy->g;
 823        struct b43_txpower_lo_control *lo = gphy->lo_control;
 824        int i;
 825        int rf_offset, bb_offset;
 826        const struct b43_rfatt *rfatt;
 827        const struct b43_bbatt *bbatt;
 828        u64 power_vector;
 829        bool table_changed = false;
 830
 831        BUILD_BUG_ON(B43_DC_LT_SIZE != 32);
 832        B43_WARN_ON(lo->rfatt_list.len * lo->bbatt_list.len > 64);
 833
 834        power_vector = lo->power_vector;
 835        if (!update_all && !power_vector)
 836                return; /* Nothing to do. */
 837
 838        /* Suspend the MAC now to avoid continuous suspend/enable
 839         * cycles in the loop. */
 840        b43_mac_suspend(dev);
 841
 842        for (i = 0; i < B43_DC_LT_SIZE * 2; i++) {
 843                struct b43_lo_calib *cal;
 844                int idx;
 845                u16 val;
 846
 847                if (!update_all && !(power_vector & (((u64)1ULL) << i)))
 848                        continue;
 849                /* Update the table entry for this power_vector bit.
 850                 * The table rows are RFatt entries and columns are BBatt. */
 851                bb_offset = i / lo->rfatt_list.len;
 852                rf_offset = i % lo->rfatt_list.len;
 853                bbatt = &(lo->bbatt_list.list[bb_offset]);
 854                rfatt = &(lo->rfatt_list.list[rf_offset]);
 855
 856                cal = b43_calibrate_lo_setting(dev, bbatt, rfatt);
 857                if (!cal) {
 858                        b43warn(dev->wl, "LO: Could not "
 859                                "calibrate DC table entry\n");
 860                        continue;
 861                }
 862                /*FIXME: Is Q really in the low nibble? */
 863                val = (u8)(cal->ctl.q);
 864                val |= ((u8)(cal->ctl.i)) << 4;
 865                kfree(cal);
 866
 867                /* Get the index into the hardware DC LT. */
 868                idx = i / 2;
 869                /* Change the table in memory. */
 870                if (i % 2) {
 871                        /* Change the high byte. */
 872                        lo->dc_lt[idx] = (lo->dc_lt[idx] & 0x00FF)
 873                                         | ((val & 0x00FF) << 8);
 874                } else {
 875                        /* Change the low byte. */
 876                        lo->dc_lt[idx] = (lo->dc_lt[idx] & 0xFF00)
 877                                         | (val & 0x00FF);
 878                }
 879                table_changed = true;
 880        }
 881        if (table_changed) {
 882                /* The table changed in memory. Update the hardware table. */
 883                for (i = 0; i < B43_DC_LT_SIZE; i++)
 884                        b43_phy_write(dev, 0x3A0 + i, lo->dc_lt[i]);
 885        }
 886        b43_mac_enable(dev);
 887}
 888
 889/* Fixup the RF attenuation value for the case where we are
 890 * using the PAD mixer. */
 891static inline void b43_lo_fixup_rfatt(struct b43_rfatt *rf)
 892{
 893        if (!rf->with_padmix)
 894                return;
 895        if ((rf->att != 1) && (rf->att != 2) && (rf->att != 3))
 896                rf->att = 4;
 897}
 898
 899void b43_lo_g_adjust(struct b43_wldev *dev)
 900{
 901        struct b43_phy_g *gphy = dev->phy.g;
 902        struct b43_lo_calib *cal;
 903        struct b43_rfatt rf;
 904
 905        memcpy(&rf, &gphy->rfatt, sizeof(rf));
 906        b43_lo_fixup_rfatt(&rf);
 907
 908        cal = b43_get_calib_lo_settings(dev, &gphy->bbatt, &rf);
 909        if (!cal)
 910                return;
 911        b43_lo_write(dev, &cal->ctl);
 912}
 913
 914void b43_lo_g_adjust_to(struct b43_wldev *dev,
 915                        u16 rfatt, u16 bbatt, u16 tx_control)
 916{
 917        struct b43_rfatt rf;
 918        struct b43_bbatt bb;
 919        struct b43_lo_calib *cal;
 920
 921        memset(&rf, 0, sizeof(rf));
 922        memset(&bb, 0, sizeof(bb));
 923        rf.att = rfatt;
 924        bb.att = bbatt;
 925        b43_lo_fixup_rfatt(&rf);
 926        cal = b43_get_calib_lo_settings(dev, &bb, &rf);
 927        if (!cal)
 928                return;
 929        b43_lo_write(dev, &cal->ctl);
 930}
 931
 932/* Periodic LO maintenance work */
 933void b43_lo_g_maintenance_work(struct b43_wldev *dev)
 934{
 935        struct b43_phy *phy = &dev->phy;
 936        struct b43_phy_g *gphy = phy->g;
 937        struct b43_txpower_lo_control *lo = gphy->lo_control;
 938        unsigned long now;
 939        unsigned long expire;
 940        struct b43_lo_calib *cal, *tmp;
 941        bool current_item_expired = false;
 942        bool hwpctl;
 943
 944        if (!lo)
 945                return;
 946        now = jiffies;
 947        hwpctl = b43_has_hardware_pctl(dev);
 948
 949        if (hwpctl) {
 950                /* Read the power vector and update it, if needed. */
 951                expire = now - B43_LO_PWRVEC_EXPIRE;
 952                if (time_before(lo->pwr_vec_read_time, expire)) {
 953                        lo_read_power_vector(dev);
 954                        b43_gphy_dc_lt_init(dev, 0);
 955                }
 956                //FIXME Recalc the whole DC table from time to time?
 957        }
 958
 959        if (hwpctl)
 960                return;
 961        /* Search for expired LO settings. Remove them.
 962         * Recalibrate the current setting, if expired. */
 963        expire = now - B43_LO_CALIB_EXPIRE;
 964        list_for_each_entry_safe(cal, tmp, &lo->calib_list, list) {
 965                if (!time_before(cal->calib_time, expire))
 966                        continue;
 967                /* This item expired. */
 968                if (b43_compare_bbatt(&cal->bbatt, &gphy->bbatt) &&
 969                    b43_compare_rfatt(&cal->rfatt, &gphy->rfatt)) {
 970                        B43_WARN_ON(current_item_expired);
 971                        current_item_expired = true;
 972                }
 973                if (b43_debug(dev, B43_DBG_LO)) {
 974                        b43dbg(dev->wl, "LO: Item BB(%u), RF(%u,%u), "
 975                               "I=%d, Q=%d expired\n",
 976                               cal->bbatt.att, cal->rfatt.att,
 977                               cal->rfatt.with_padmix,
 978                               cal->ctl.i, cal->ctl.q);
 979                }
 980                list_del(&cal->list);
 981                kfree(cal);
 982        }
 983        if (current_item_expired || unlikely(list_empty(&lo->calib_list))) {
 984                /* Recalibrate currently used LO setting. */
 985                if (b43_debug(dev, B43_DBG_LO))
 986                        b43dbg(dev->wl, "LO: Recalibrating current LO setting\n");
 987                cal = b43_calibrate_lo_setting(dev, &gphy->bbatt, &gphy->rfatt);
 988                if (cal) {
 989                        list_add(&cal->list, &lo->calib_list);
 990                        b43_lo_write(dev, &cal->ctl);
 991                } else
 992                        b43warn(dev->wl, "Failed to recalibrate current LO setting\n");
 993        }
 994}
 995
 996void b43_lo_g_cleanup(struct b43_wldev *dev)
 997{
 998        struct b43_txpower_lo_control *lo = dev->phy.g->lo_control;
 999        struct b43_lo_calib *cal, *tmp;
1000
1001        if (!lo)
1002                return;
1003        list_for_each_entry_safe(cal, tmp, &lo->calib_list, list) {
1004                list_del(&cal->list);
1005                kfree(cal);
1006        }
1007}
1008
1009/* LO Initialization */
1010void b43_lo_g_init(struct b43_wldev *dev)
1011{
1012        if (b43_has_hardware_pctl(dev)) {
1013                lo_read_power_vector(dev);
1014                b43_gphy_dc_lt_init(dev, 1);
1015        }
1016}
1017