root/drivers/media/dvb-frontends/af9013.c

DEFINITIONS

1. af9013_set_gpio
2. af9013_get_tune_settings
3. af9013_set_frontend
4. af9013_get_frontend
5. af9013_read_status
6. af9013_read_snr
7. af9013_read_signal_strength
8. af9013_read_ber
9. af9013_read_ucblocks
10. af9013_init
11. af9013_sleep
12. af9013_download_firmware
13. af9013_pid_filter_ctrl
14. af9013_pid_filter
15. af9013_get_dvb_frontend
16. af9013_get_i2c_adapter
17. af9013_select
18. af9013_deselect
19. af9013_wregs
20. af9013_rregs
21. af9013_regmap_write
22. af9013_regmap_read
23. af9013_probe
24. af9013_remove

   1 // SPDX-License-Identifier: GPL-2.0-or-later
   2 /*
   3  * Afatech AF9013 demodulator driver
   4  *
   5  * Copyright (C) 2007 Antti Palosaari <crope@iki.fi>
   6  * Copyright (C) 2011 Antti Palosaari <crope@iki.fi>
   7  *
   8  * Thanks to Afatech who kindly provided information.
   9  */
  10 
  11 #include "af9013_priv.h"
  12 
  13 struct af9013_state {
  14         struct i2c_client *client;
  15         struct regmap *regmap;
  16         struct i2c_mux_core *muxc;
  17         struct dvb_frontend fe;
  18         u32 clk;
  19         u8 tuner;
  20         u32 if_frequency;
  21         u8 ts_mode;
  22         u8 ts_output_pin;
  23         bool spec_inv;
  24         u8 api_version[4];
  25         u8 gpio[4];
  26 
  27         u32 bandwidth_hz;
  28         enum fe_status fe_status;
  29         /* RF and IF AGC limits used for signal strength calc */
  30         u8 strength_en, rf_agc_50, rf_agc_80, if_agc_50, if_agc_80;
  31         unsigned long set_frontend_jiffies;
  32         unsigned long read_status_jiffies;
  33         unsigned long strength_jiffies;
  34         unsigned long cnr_jiffies;
  35         unsigned long ber_ucb_jiffies;
  36         u16 dvbv3_snr;
  37         u16 dvbv3_strength;
  38         u32 dvbv3_ber;
  39         u32 dvbv3_ucblocks;
  40         bool first_tune;
  41 };
  42 
  43 static int af9013_set_gpio(struct af9013_state *state, u8 gpio, u8 gpioval)
  44 {
  45         struct i2c_client *client = state->client;
  46         int ret;
  47         u8 pos;
  48         u16 addr;
  49 
  50         dev_dbg(&client->dev, "gpio %u, gpioval %02x\n", gpio, gpioval);
  51 
  52         /*
  53          * GPIO0 & GPIO1 0xd735
  54          * GPIO2 & GPIO3 0xd736
  55          */
  56 
  57         switch (gpio) {
  58         case 0:
  59         case 1:
  60                 addr = 0xd735;
  61                 break;
  62         case 2:
  63         case 3:
  64                 addr = 0xd736;
  65                 break;
  66 
  67         default:
  68                 ret = -EINVAL;
  69                 goto err;
  70         }
  71 
  72         switch (gpio) {
  73         case 0:
  74         case 2:
  75                 pos = 0;
  76                 break;
  77         case 1:
  78         case 3:
  79         default:
  80                 pos = 4;
  81                 break;
  82         }
  83 
  84         ret = regmap_update_bits(state->regmap, addr, 0x0f << pos,
  85                                  gpioval << pos);
  86         if (ret)
  87                 goto err;
  88 
  89         return 0;
  90 err:
  91         dev_dbg(&client->dev, "failed %d\n", ret);
  92         return ret;
  93 }
  94 
  95 static int af9013_get_tune_settings(struct dvb_frontend *fe,
  96         struct dvb_frontend_tune_settings *fesettings)
  97 {
  98         fesettings->min_delay_ms = 800;
  99         fesettings->step_size = 0;
 100         fesettings->max_drift = 0;
 101 
 102         return 0;
 103 }
 104 
 105 static int af9013_set_frontend(struct dvb_frontend *fe)
 106 {
 107         struct af9013_state *state = fe->demodulator_priv;
 108         struct i2c_client *client = state->client;
 109         struct dtv_frontend_properties *c = &fe->dtv_property_cache;
 110         int ret, i, sampling_freq;
 111         bool auto_mode, spec_inv;
 112         u8 buf[6];
 113         u32 if_frequency, freq_cw;
 114 
 115         dev_dbg(&client->dev, "frequency %u, bandwidth_hz %u\n",
 116                 c->frequency, c->bandwidth_hz);
 117 
 118         /* program tuner */
 119         if (fe->ops.tuner_ops.set_params) {
 120                 ret = fe->ops.tuner_ops.set_params(fe);
 121                 if (ret)
 122                         goto err;
 123         }
 124 
 125         /* program CFOE coefficients */
 126         if (c->bandwidth_hz != state->bandwidth_hz) {
 127                 for (i = 0; i < ARRAY_SIZE(coeff_lut); i++) {
 128                         if (coeff_lut[i].clock == state->clk &&
 129                                 coeff_lut[i].bandwidth_hz == c->bandwidth_hz) {
 130                                 break;
 131                         }
 132                 }
 133 
 134                 /* Return an error if can't find bandwidth or the right clock */
 135                 if (i == ARRAY_SIZE(coeff_lut)) {
 136                         ret = -EINVAL;
 137                         goto err;
 138                 }
 139 
 140                 ret = regmap_bulk_write(state->regmap, 0xae00, coeff_lut[i].val,
 141                                         sizeof(coeff_lut[i].val));
 142                 if (ret)
 143                         goto err;
 144         }
 145 
 146         /* program frequency control */
 147         if (c->bandwidth_hz != state->bandwidth_hz || state->first_tune) {
 148                 /* get used IF frequency */
 149                 if (fe->ops.tuner_ops.get_if_frequency) {
 150                         ret = fe->ops.tuner_ops.get_if_frequency(fe,
 151                                                                  &if_frequency);
 152                         if (ret)
 153                                 goto err;
 154                 } else {
 155                         if_frequency = state->if_frequency;
 156                 }
 157 
 158                 dev_dbg(&client->dev, "if_frequency %u\n", if_frequency);
 159 
 160                 sampling_freq = if_frequency;
 161 
 162                 while (sampling_freq > (state->clk / 2))
 163                         sampling_freq -= state->clk;
 164 
 165                 if (sampling_freq < 0) {
 166                         sampling_freq *= -1;
 167                         spec_inv = state->spec_inv;
 168                 } else {
 169                         spec_inv = !state->spec_inv;
 170                 }
 171 
 172                 freq_cw = DIV_ROUND_CLOSEST_ULL((u64)sampling_freq * 0x800000,
 173                                                 state->clk);
 174 
 175                 if (spec_inv)
 176                         freq_cw = 0x800000 - freq_cw;
 177 
 178                 buf[0] = (freq_cw >>  0) & 0xff;
 179                 buf[1] = (freq_cw >>  8) & 0xff;
 180                 buf[2] = (freq_cw >> 16) & 0x7f;
 181 
 182                 freq_cw = 0x800000 - freq_cw;
 183 
 184                 buf[3] = (freq_cw >>  0) & 0xff;
 185                 buf[4] = (freq_cw >>  8) & 0xff;
 186                 buf[5] = (freq_cw >> 16) & 0x7f;
 187 
 188                 ret = regmap_bulk_write(state->regmap, 0xd140, buf, 3);
 189                 if (ret)
 190                         goto err;
 191 
 192                 ret = regmap_bulk_write(state->regmap, 0x9be7, buf, 6);
 193                 if (ret)
 194                         goto err;
 195         }
 196 
 197         /* clear TPS lock flag */
 198         ret = regmap_update_bits(state->regmap, 0xd330, 0x08, 0x08);
 199         if (ret)
 200                 goto err;
 201 
 202         /* clear MPEG2 lock flag */
 203         ret = regmap_update_bits(state->regmap, 0xd507, 0x40, 0x00);
 204         if (ret)
 205                 goto err;
 206 
 207         /* empty channel function */
 208         ret = regmap_update_bits(state->regmap, 0x9bfe, 0x01, 0x00);
 209         if (ret)
 210                 goto err;
 211 
 212         /* empty DVB-T channel function */
 213         ret = regmap_update_bits(state->regmap, 0x9bc2, 0x01, 0x00);
 214         if (ret)
 215                 goto err;
 216 
 217         /* transmission parameters */
 218         auto_mode = false;
 219         memset(buf, 0, 3);
 220 
 221         switch (c->transmission_mode) {
 222         case TRANSMISSION_MODE_AUTO:
 223                 auto_mode = true;
 224                 break;
 225         case TRANSMISSION_MODE_2K:
 226                 break;
 227         case TRANSMISSION_MODE_8K:
 228                 buf[0] |= (1 << 0);
 229                 break;
 230         default:
 231                 dev_dbg(&client->dev, "invalid transmission_mode\n");
 232                 auto_mode = true;
 233         }
 234 
 235         switch (c->guard_interval) {
 236         case GUARD_INTERVAL_AUTO:
 237                 auto_mode = true;
 238                 break;
 239         case GUARD_INTERVAL_1_32:
 240                 break;
 241         case GUARD_INTERVAL_1_16:
 242                 buf[0] |= (1 << 2);
 243                 break;
 244         case GUARD_INTERVAL_1_8:
 245                 buf[0] |= (2 << 2);
 246                 break;
 247         case GUARD_INTERVAL_1_4:
 248                 buf[0] |= (3 << 2);
 249                 break;
 250         default:
 251                 dev_dbg(&client->dev, "invalid guard_interval\n");
 252                 auto_mode = true;
 253         }
 254 
 255         switch (c->hierarchy) {
 256         case HIERARCHY_AUTO:
 257                 auto_mode = true;
 258                 break;
 259         case HIERARCHY_NONE:
 260                 break;
 261         case HIERARCHY_1:
 262                 buf[0] |= (1 << 4);
 263                 break;
 264         case HIERARCHY_2:
 265                 buf[0] |= (2 << 4);
 266                 break;
 267         case HIERARCHY_4:
 268                 buf[0] |= (3 << 4);
 269                 break;
 270         default:
 271                 dev_dbg(&client->dev, "invalid hierarchy\n");
 272                 auto_mode = true;
 273         }
 274 
 275         switch (c->modulation) {
 276         case QAM_AUTO:
 277                 auto_mode = true;
 278                 break;
 279         case QPSK:
 280                 break;
 281         case QAM_16:
 282                 buf[1] |= (1 << 6);
 283                 break;
 284         case QAM_64:
 285                 buf[1] |= (2 << 6);
 286                 break;
 287         default:
 288                 dev_dbg(&client->dev, "invalid modulation\n");
 289                 auto_mode = true;
 290         }
 291 
 292         /* Use HP. How and which case we can switch to LP? */
 293         buf[1] |= (1 << 4);
 294 
 295         switch (c->code_rate_HP) {
 296         case FEC_AUTO:
 297                 auto_mode = true;
 298                 break;
 299         case FEC_1_2:
 300                 break;
 301         case FEC_2_3:
 302                 buf[2] |= (1 << 0);
 303                 break;
 304         case FEC_3_4:
 305                 buf[2] |= (2 << 0);
 306                 break;
 307         case FEC_5_6:
 308                 buf[2] |= (3 << 0);
 309                 break;
 310         case FEC_7_8:
 311                 buf[2] |= (4 << 0);
 312                 break;
 313         default:
 314                 dev_dbg(&client->dev, "invalid code_rate_HP\n");
 315                 auto_mode = true;
 316         }
 317 
 318         switch (c->code_rate_LP) {
 319         case FEC_AUTO:
 320                 auto_mode = true;
 321                 break;
 322         case FEC_1_2:
 323                 break;
 324         case FEC_2_3:
 325                 buf[2] |= (1 << 3);
 326                 break;
 327         case FEC_3_4:
 328                 buf[2] |= (2 << 3);
 329                 break;
 330         case FEC_5_6:
 331                 buf[2] |= (3 << 3);
 332                 break;
 333         case FEC_7_8:
 334                 buf[2] |= (4 << 3);
 335                 break;
 336         case FEC_NONE:
 337                 break;
 338         default:
 339                 dev_dbg(&client->dev, "invalid code_rate_LP\n");
 340                 auto_mode = true;
 341         }
 342 
 343         switch (c->bandwidth_hz) {
 344         case 6000000:
 345                 break;
 346         case 7000000:
 347                 buf[1] |= (1 << 2);
 348                 break;
 349         case 8000000:
 350                 buf[1] |= (2 << 2);
 351                 break;
 352         default:
 353                 dev_dbg(&client->dev, "invalid bandwidth_hz\n");
 354                 ret = -EINVAL;
 355                 goto err;
 356         }
 357 
 358         ret = regmap_bulk_write(state->regmap, 0xd3c0, buf, 3);
 359         if (ret)
 360                 goto err;
 361 
 362         if (auto_mode) {
 363                 /* clear easy mode flag */
 364                 ret = regmap_write(state->regmap, 0xaefd, 0x00);
 365                 if (ret)
 366                         goto err;
 367 
 368                 dev_dbg(&client->dev, "auto params\n");
 369         } else {
 370                 /* set easy mode flag */
 371                 ret = regmap_write(state->regmap, 0xaefd, 0x01);
 372                 if (ret)
 373                         goto err;
 374 
 375                 ret = regmap_write(state->regmap, 0xaefe, 0x00);
 376                 if (ret)
 377                         goto err;
 378 
 379                 dev_dbg(&client->dev, "manual params\n");
 380         }
 381 
 382         /* Reset FSM */
 383         ret = regmap_write(state->regmap, 0xffff, 0x00);
 384         if (ret)
 385                 goto err;
 386 
 387         state->bandwidth_hz = c->bandwidth_hz;
 388         state->set_frontend_jiffies = jiffies;
 389         state->first_tune = false;
 390 
 391         return 0;
 392 err:
 393         dev_dbg(&client->dev, "failed %d\n", ret);
 394         return ret;
 395 }
 396 
 397 static int af9013_get_frontend(struct dvb_frontend *fe,
 398                                struct dtv_frontend_properties *c)
 399 {
 400         struct af9013_state *state = fe->demodulator_priv;
 401         struct i2c_client *client = state->client;
 402         int ret;
 403         u8 buf[3];
 404 
 405         dev_dbg(&client->dev, "\n");
 406 
 407         ret = regmap_bulk_read(state->regmap, 0xd3c0, buf, 3);
 408         if (ret)
 409                 goto err;
 410 
 411         switch ((buf[1] >> 6) & 3) {
 412         case 0:
 413                 c->modulation = QPSK;
 414                 break;
 415         case 1:
 416                 c->modulation = QAM_16;
 417                 break;
 418         case 2:
 419                 c->modulation = QAM_64;
 420                 break;
 421         }
 422 
 423         switch ((buf[0] >> 0) & 3) {
 424         case 0:
 425                 c->transmission_mode = TRANSMISSION_MODE_2K;
 426                 break;
 427         case 1:
 428                 c->transmission_mode = TRANSMISSION_MODE_8K;
 429         }
 430 
 431         switch ((buf[0] >> 2) & 3) {
 432         case 0:
 433                 c->guard_interval = GUARD_INTERVAL_1_32;
 434                 break;
 435         case 1:
 436                 c->guard_interval = GUARD_INTERVAL_1_16;
 437                 break;
 438         case 2:
 439                 c->guard_interval = GUARD_INTERVAL_1_8;
 440                 break;
 441         case 3:
 442                 c->guard_interval = GUARD_INTERVAL_1_4;
 443                 break;
 444         }
 445 
 446         switch ((buf[0] >> 4) & 7) {
 447         case 0:
 448                 c->hierarchy = HIERARCHY_NONE;
 449                 break;
 450         case 1:
 451                 c->hierarchy = HIERARCHY_1;
 452                 break;
 453         case 2:
 454                 c->hierarchy = HIERARCHY_2;
 455                 break;
 456         case 3:
 457                 c->hierarchy = HIERARCHY_4;
 458                 break;
 459         }
 460 
 461         switch ((buf[2] >> 0) & 7) {
 462         case 0:
 463                 c->code_rate_HP = FEC_1_2;
 464                 break;
 465         case 1:
 466                 c->code_rate_HP = FEC_2_3;
 467                 break;
 468         case 2:
 469                 c->code_rate_HP = FEC_3_4;
 470                 break;
 471         case 3:
 472                 c->code_rate_HP = FEC_5_6;
 473                 break;
 474         case 4:
 475                 c->code_rate_HP = FEC_7_8;
 476                 break;
 477         }
 478 
 479         switch ((buf[2] >> 3) & 7) {
 480         case 0:
 481                 c->code_rate_LP = FEC_1_2;
 482                 break;
 483         case 1:
 484                 c->code_rate_LP = FEC_2_3;
 485                 break;
 486         case 2:
 487                 c->code_rate_LP = FEC_3_4;
 488                 break;
 489         case 3:
 490                 c->code_rate_LP = FEC_5_6;
 491                 break;
 492         case 4:
 493                 c->code_rate_LP = FEC_7_8;
 494                 break;
 495         }
 496 
 497         switch ((buf[1] >> 2) & 3) {
 498         case 0:
 499                 c->bandwidth_hz = 6000000;
 500                 break;
 501         case 1:
 502                 c->bandwidth_hz = 7000000;
 503                 break;
 504         case 2:
 505                 c->bandwidth_hz = 8000000;
 506                 break;
 507         }
 508 
 509         return 0;
 510 err:
 511         dev_dbg(&client->dev, "failed %d\n", ret);
 512         return ret;
 513 }
 514 
 515 static int af9013_read_status(struct dvb_frontend *fe, enum fe_status *status)
 516 {
 517         struct af9013_state *state = fe->demodulator_priv;
 518         struct i2c_client *client = state->client;
 519         struct dtv_frontend_properties *c = &fe->dtv_property_cache;
 520         int ret, stmp1;
 521         unsigned int utmp, utmp1, utmp2, utmp3, utmp4;
 522         u8 buf[7];
 523 
 524         dev_dbg(&client->dev, "\n");
 525 
 526         /*
 527          * Return status from the cache if it is younger than 2000ms with the
 528          * exception of last tune is done during 4000ms.
 529          */
 530         if (time_is_after_jiffies(state->read_status_jiffies + msecs_to_jiffies(2000)) &&
 531             time_is_before_jiffies(state->set_frontend_jiffies + msecs_to_jiffies(4000))) {
 532                 *status = state->fe_status;
 533         } else {
 534                 /* MPEG2 lock */
 535                 ret = regmap_read(state->regmap, 0xd507, &utmp);
 536                 if (ret)
 537                         goto err;
 538 
 539                 if ((utmp >> 6) & 0x01) {
 540                         utmp1 = FE_HAS_SIGNAL | FE_HAS_CARRIER |
 541                                 FE_HAS_VITERBI | FE_HAS_SYNC | FE_HAS_LOCK;
 542                 } else {
 543                         /* TPS lock */
 544                         ret = regmap_read(state->regmap, 0xd330, &utmp);
 545                         if (ret)
 546                                 goto err;
 547 
 548                         if ((utmp >> 3) & 0x01)
 549                                 utmp1 = FE_HAS_SIGNAL | FE_HAS_CARRIER |
 550                                         FE_HAS_VITERBI;
 551                         else
 552                                 utmp1 = 0;
 553                 }
 554 
 555                 dev_dbg(&client->dev, "fe_status %02x\n", utmp1);
 556 
 557                 state->read_status_jiffies = jiffies;
 558 
 559                 state->fe_status = utmp1;
 560                 *status = utmp1;
 561         }
 562 
 563         /* Signal strength */
 564         switch (state->strength_en) {
 565         case 0:
 566                 /* Check if we support signal strength */
 567                 ret = regmap_read(state->regmap, 0x9bee, &utmp);
 568                 if (ret)
 569                         goto err;
 570 
 571                 if ((utmp >> 0) & 0x01) {
 572                         /* Read agc values for signal strength estimation */
 573                         ret = regmap_read(state->regmap, 0x9bbd, &utmp1);
 574                         if (ret)
 575                                 goto err;
 576                         ret = regmap_read(state->regmap, 0x9bd0, &utmp2);
 577                         if (ret)
 578                                 goto err;
 579                         ret = regmap_read(state->regmap, 0x9be2, &utmp3);
 580                         if (ret)
 581                                 goto err;
 582                         ret = regmap_read(state->regmap, 0x9be4, &utmp4);
 583                         if (ret)
 584                                 goto err;
 585 
 586                         state->rf_agc_50 = utmp1;
 587                         state->rf_agc_80 = utmp2;
 588                         state->if_agc_50 = utmp3;
 589                         state->if_agc_80 = utmp4;
 590                         dev_dbg(&client->dev,
 591                                 "rf_agc_50 %u, rf_agc_80 %u, if_agc_50 %u, if_agc_80 %u\n",
 592                                 utmp1, utmp2, utmp3, utmp4);
 593 
 594                         state->strength_en = 1;
 595                 } else {
 596                         /* Signal strength is not supported */
 597                         state->strength_en = 2;
 598                         break;
 599                 }
 600                 /* Fall through */
 601         case 1:
 602                 if (time_is_after_jiffies(state->strength_jiffies + msecs_to_jiffies(2000)))
 603                         break;
 604 
 605                 /* Read value */
 606                 ret = regmap_bulk_read(state->regmap, 0xd07c, buf, 2);
 607                 if (ret)
 608                         goto err;
 609 
 610                 /*
 611                  * Construct line equation from tuner dependent -80/-50 dBm agc
 612                  * limits and use it to map current agc value to dBm estimate
 613                  */
 614                 #define agc_gain (buf[0] + buf[1])
 615                 #define agc_gain_50dbm (state->rf_agc_50 + state->if_agc_50)
 616                 #define agc_gain_80dbm (state->rf_agc_80 + state->if_agc_80)
 617                 stmp1 = 30000 * (agc_gain - agc_gain_80dbm) /
 618                         (agc_gain_50dbm - agc_gain_80dbm) - 80000;
 619 
 620                 dev_dbg(&client->dev,
 621                         "strength %d, agc_gain %d, agc_gain_50dbm %d, agc_gain_80dbm %d\n",
 622                         stmp1, agc_gain, agc_gain_50dbm, agc_gain_80dbm);
 623 
 624                 state->strength_jiffies = jiffies;
 625                 /* Convert [-90, -30] dBm to [0x0000, 0xffff] for dvbv3 */
 626                 utmp1 = clamp(stmp1 + 90000, 0, 60000);
 627                 state->dvbv3_strength = div_u64((u64)utmp1 * 0xffff, 60000);
 628 
 629                 c->strength.stat[0].scale = FE_SCALE_DECIBEL;
 630                 c->strength.stat[0].svalue = stmp1;
 631                 break;
 632         default:
 633                 c->strength.stat[0].scale = FE_SCALE_NOT_AVAILABLE;
 634                 break;
 635         }
 636 
 637         /* CNR */
 638         switch (state->fe_status & FE_HAS_VITERBI) {
 639         case FE_HAS_VITERBI:
 640                 if (time_is_after_jiffies(state->cnr_jiffies + msecs_to_jiffies(2000)))
 641                         break;
 642 
 643                 /* Check if cnr ready */
 644                 ret = regmap_read(state->regmap, 0xd2e1, &utmp);
 645                 if (ret)
 646                         goto err;
 647 
 648                 if (!((utmp >> 3) & 0x01)) {
 649                         dev_dbg(&client->dev, "cnr not ready\n");
 650                         break;
 651                 }
 652 
 653                 /* Read value */
 654                 ret = regmap_bulk_read(state->regmap, 0xd2e3, buf, 3);
 655                 if (ret)
 656                         goto err;
 657 
 658                 utmp1 = buf[2] << 16 | buf[1] << 8 | buf[0] << 0;
 659 
 660                 /* Read current modulation */
 661                 ret = regmap_read(state->regmap, 0xd3c1, &utmp);
 662                 if (ret)
 663                         goto err;
 664 
 665                 switch ((utmp >> 6) & 3) {
 666                 case 0:
 667                         /*
 668                          * QPSK
 669                          * CNR[dB] 13 * -log10((1690000 - value) / value) + 2.6
 670                          * value [653799, 1689999], 2.6 / 13 = 3355443
 671                          */
 672                         utmp1 = clamp(utmp1, 653799U, 1689999U);
 673                         utmp1 = ((u64)(intlog10(utmp1)
 674                                 - intlog10(1690000 - utmp1)
 675                                 + 3355443) * 13 * 1000) >> 24;
 676                         break;
 677                 case 1:
 678                         /*
 679                          * QAM-16
 680                          * CNR[dB] 6 * log10((value - 370000) / (828000 - value)) + 15.7
 681                          * value [371105, 827999], 15.7 / 6 = 43900382
 682                          */
 683                         utmp1 = clamp(utmp1, 371105U, 827999U);
 684                         utmp1 = ((u64)(intlog10(utmp1 - 370000)
 685                                 - intlog10(828000 - utmp1)
 686                                 + 43900382) * 6 * 1000) >> 24;
 687                         break;
 688                 case 2:
 689                         /*
 690                          * QAM-64
 691                          * CNR[dB] 8 * log10((value - 193000) / (425000 - value)) + 23.8
 692                          * value [193246, 424999], 23.8 / 8 = 49912218
 693                          */
 694                         utmp1 = clamp(utmp1, 193246U, 424999U);
 695                         utmp1 = ((u64)(intlog10(utmp1 - 193000)
 696                                 - intlog10(425000 - utmp1)
 697                                 + 49912218) * 8 * 1000) >> 24;
 698                         break;
 699                 default:
 700                         dev_dbg(&client->dev, "invalid modulation %u\n",
 701                                 (utmp >> 6) & 3);
 702                         utmp1 = 0;
 703                         break;
 704                 }
 705 
 706                 dev_dbg(&client->dev, "cnr %u\n", utmp1);
 707 
 708                 state->cnr_jiffies = jiffies;
 709                 state->dvbv3_snr = utmp1 / 100;
 710 
 711                 c->cnr.stat[0].scale = FE_SCALE_DECIBEL;
 712                 c->cnr.stat[0].svalue = utmp1;
 713                 break;
 714         default:
 715                 c->cnr.stat[0].scale = FE_SCALE_NOT_AVAILABLE;
 716                 break;
 717         }
 718 
 719         /* BER / PER */
 720         switch (state->fe_status & FE_HAS_SYNC) {
 721         case FE_HAS_SYNC:
 722                 if (time_is_after_jiffies(state->ber_ucb_jiffies + msecs_to_jiffies(2000)))
 723                         break;
 724 
 725                 /* Check if ber / ucb is ready */
 726                 ret = regmap_read(state->regmap, 0xd391, &utmp);
 727                 if (ret)
 728                         goto err;
 729 
 730                 if (!((utmp >> 4) & 0x01)) {
 731                         dev_dbg(&client->dev, "ber not ready\n");
 732                         break;
 733                 }
 734 
 735                 /* Read value */
 736                 ret = regmap_bulk_read(state->regmap, 0xd385, buf, 7);
 737                 if (ret)
 738                         goto err;
 739 
 740                 utmp1 = buf[4] << 16 | buf[3] << 8 | buf[2] << 0;
 741                 utmp2 = (buf[1] << 8 | buf[0] << 0) * 204 * 8;
 742                 utmp3 = buf[6] << 8 | buf[5] << 0;
 743                 utmp4 = buf[1] << 8 | buf[0] << 0;
 744 
 745                 /* Use 10000 TS packets for measure */
 746                 if (utmp4 != 10000) {
 747                         buf[0] = (10000 >> 0) & 0xff;
 748                         buf[1] = (10000 >> 8) & 0xff;
 749                         ret = regmap_bulk_write(state->regmap, 0xd385, buf, 2);
 750                         if (ret)
 751                                 goto err;
 752                 }
 753 
 754                 /* Reset ber / ucb counter */
 755                 ret = regmap_update_bits(state->regmap, 0xd391, 0x20, 0x20);
 756                 if (ret)
 757                         goto err;
 758 
 759                 dev_dbg(&client->dev, "post_bit_error %u, post_bit_count %u\n",
 760                         utmp1, utmp2);
 761                 dev_dbg(&client->dev, "block_error %u, block_count %u\n",
 762                         utmp3, utmp4);
 763 
 764                 state->ber_ucb_jiffies = jiffies;
 765                 state->dvbv3_ber = utmp1;
 766                 state->dvbv3_ucblocks += utmp3;
 767 
 768                 c->post_bit_error.stat[0].scale = FE_SCALE_COUNTER;
 769                 c->post_bit_error.stat[0].uvalue += utmp1;
 770                 c->post_bit_count.stat[0].scale = FE_SCALE_COUNTER;
 771                 c->post_bit_count.stat[0].uvalue += utmp2;
 772 
 773                 c->block_error.stat[0].scale = FE_SCALE_COUNTER;
 774                 c->block_error.stat[0].uvalue += utmp3;
 775                 c->block_count.stat[0].scale = FE_SCALE_COUNTER;
 776                 c->block_count.stat[0].uvalue += utmp4;
 777                 break;
 778         default:
 779                 c->post_bit_error.stat[0].scale = FE_SCALE_NOT_AVAILABLE;
 780                 c->post_bit_count.stat[0].scale = FE_SCALE_NOT_AVAILABLE;
 781 
 782                 c->block_error.stat[0].scale = FE_SCALE_NOT_AVAILABLE;
 783                 c->block_count.stat[0].scale = FE_SCALE_NOT_AVAILABLE;
 784                 break;
 785         }
 786 
 787         return 0;
 788 err:
 789         dev_dbg(&client->dev, "failed %d\n", ret);
 790         return ret;
 791 }
 792 
 793 static int af9013_read_snr(struct dvb_frontend *fe, u16 *snr)
 794 {
 795         struct af9013_state *state = fe->demodulator_priv;
 796 
 797         *snr = state->dvbv3_snr;
 798 
 799         return 0;
 800 }
 801 
 802 static int af9013_read_signal_strength(struct dvb_frontend *fe, u16 *strength)
 803 {
 804         struct af9013_state *state = fe->demodulator_priv;
 805 
 806         *strength = state->dvbv3_strength;
 807 
 808         return 0;
 809 }
 810 
 811 static int af9013_read_ber(struct dvb_frontend *fe, u32 *ber)
 812 {
 813         struct af9013_state *state = fe->demodulator_priv;
 814 
 815         *ber = state->dvbv3_ber;
 816 
 817         return 0;
 818 }
 819 
 820 static int af9013_read_ucblocks(struct dvb_frontend *fe, u32 *ucblocks)
 821 {
 822         struct af9013_state *state = fe->demodulator_priv;
 823 
 824         *ucblocks = state->dvbv3_ucblocks;
 825 
 826         return 0;
 827 }
 828 
 829 static int af9013_init(struct dvb_frontend *fe)
 830 {
 831         struct af9013_state *state = fe->demodulator_priv;
 832         struct i2c_client *client = state->client;
 833         int ret, i, len;
 834         unsigned int utmp;
 835         u8 buf[3];
 836         const struct af9013_reg_mask_val *tab;
 837 
 838         dev_dbg(&client->dev, "\n");
 839 
 840         /* ADC on */
 841         ret = regmap_update_bits(state->regmap, 0xd73a, 0x08, 0x00);
 842         if (ret)
 843                 goto err;
 844 
 845         /* Clear reset */
 846         ret = regmap_update_bits(state->regmap, 0xd417, 0x02, 0x00);
 847         if (ret)
 848                 goto err;
 849 
 850         /* Disable reset */
 851         ret = regmap_update_bits(state->regmap, 0xd417, 0x10, 0x00);
 852         if (ret)
 853                 goto err;
 854 
 855         /* write API version to firmware */
 856         ret = regmap_bulk_write(state->regmap, 0x9bf2, state->api_version, 4);
 857         if (ret)
 858                 goto err;
 859 
 860         /* program ADC control */
 861         switch (state->clk) {
 862         case 28800000: /* 28.800 MHz */
 863                 utmp = 0;
 864                 break;
 865         case 20480000: /* 20.480 MHz */
 866                 utmp = 1;
 867                 break;
 868         case 28000000: /* 28.000 MHz */
 869                 utmp = 2;
 870                 break;
 871         case 25000000: /* 25.000 MHz */
 872                 utmp = 3;
 873                 break;
 874         default:
 875                 ret = -EINVAL;
 876                 goto err;
 877         }
 878 
 879         ret = regmap_update_bits(state->regmap, 0x9bd2, 0x0f, utmp);
 880         if (ret)
 881                 goto err;
 882 
 883         utmp = div_u64((u64)state->clk * 0x80000, 1000000);
 884         buf[0] = (utmp >>  0) & 0xff;
 885         buf[1] = (utmp >>  8) & 0xff;
 886         buf[2] = (utmp >> 16) & 0xff;
 887         ret = regmap_bulk_write(state->regmap, 0xd180, buf, 3);
 888         if (ret)
 889                 goto err;
 890 
 891         /* Demod core settings */
 892         dev_dbg(&client->dev, "load demod core settings\n");
 893         len = ARRAY_SIZE(demod_init_tab);
 894         tab = demod_init_tab;
 895         for (i = 0; i < len; i++) {
 896                 ret = regmap_update_bits(state->regmap, tab[i].reg, tab[i].mask,
 897                                          tab[i].val);
 898                 if (ret)
 899                         goto err;
 900         }
 901 
 902         /* Demod tuner specific settings */
 903         dev_dbg(&client->dev, "load tuner specific settings\n");
 904         switch (state->tuner) {
 905         case AF9013_TUNER_MXL5003D:
 906                 len = ARRAY_SIZE(tuner_init_tab_mxl5003d);
 907                 tab = tuner_init_tab_mxl5003d;
 908                 break;
 909         case AF9013_TUNER_MXL5005D:
 910         case AF9013_TUNER_MXL5005R:
 911         case AF9013_TUNER_MXL5007T:
 912                 len = ARRAY_SIZE(tuner_init_tab_mxl5005);
 913                 tab = tuner_init_tab_mxl5005;
 914                 break;
 915         case AF9013_TUNER_ENV77H11D5:
 916                 len = ARRAY_SIZE(tuner_init_tab_env77h11d5);
 917                 tab = tuner_init_tab_env77h11d5;
 918                 break;
 919         case AF9013_TUNER_MT2060:
 920                 len = ARRAY_SIZE(tuner_init_tab_mt2060);
 921                 tab = tuner_init_tab_mt2060;
 922                 break;
 923         case AF9013_TUNER_MC44S803:
 924                 len = ARRAY_SIZE(tuner_init_tab_mc44s803);
 925                 tab = tuner_init_tab_mc44s803;
 926                 break;
 927         case AF9013_TUNER_QT1010:
 928         case AF9013_TUNER_QT1010A:
 929                 len = ARRAY_SIZE(tuner_init_tab_qt1010);
 930                 tab = tuner_init_tab_qt1010;
 931                 break;
 932         case AF9013_TUNER_MT2060_2:
 933                 len = ARRAY_SIZE(tuner_init_tab_mt2060_2);
 934                 tab = tuner_init_tab_mt2060_2;
 935                 break;
 936         case AF9013_TUNER_TDA18271:
 937         case AF9013_TUNER_TDA18218:
 938                 len = ARRAY_SIZE(tuner_init_tab_tda18271);
 939                 tab = tuner_init_tab_tda18271;
 940                 break;
 941         case AF9013_TUNER_UNKNOWN:
 942         default:
 943                 len = ARRAY_SIZE(tuner_init_tab_unknown);
 944                 tab = tuner_init_tab_unknown;
 945                 break;
 946         }
 947 
 948         for (i = 0; i < len; i++) {
 949                 ret = regmap_update_bits(state->regmap, tab[i].reg, tab[i].mask,
 950                                          tab[i].val);
 951                 if (ret)
 952                         goto err;
 953         }
 954 
 955         /* TS interface */
 956         if (state->ts_output_pin == 7)
 957                 utmp = 1 << 3 | state->ts_mode << 1;
 958         else
 959                 utmp = 0 << 3 | state->ts_mode << 1;
 960         ret = regmap_update_bits(state->regmap, 0xd500, 0x0e, utmp);
 961         if (ret)
 962                 goto err;
 963 
 964         /* enable lock led */
 965         ret = regmap_update_bits(state->regmap, 0xd730, 0x01, 0x01);
 966         if (ret)
 967                 goto err;
 968 
 969         state->first_tune = true;
 970 
 971         return 0;
 972 err:
 973         dev_dbg(&client->dev, "failed %d\n", ret);
 974         return ret;
 975 }
 976 
 977 static int af9013_sleep(struct dvb_frontend *fe)
 978 {
 979         struct af9013_state *state = fe->demodulator_priv;
 980         struct i2c_client *client = state->client;
 981         int ret;
 982         unsigned int utmp;
 983 
 984         dev_dbg(&client->dev, "\n");
 985 
 986         /* disable lock led */
 987         ret = regmap_update_bits(state->regmap, 0xd730, 0x01, 0x00);
 988         if (ret)
 989                 goto err;
 990 
 991         /* Enable reset */
 992         ret = regmap_update_bits(state->regmap, 0xd417, 0x10, 0x10);
 993         if (ret)
 994                 goto err;
 995 
 996         /* Start reset execution */
 997         ret = regmap_write(state->regmap, 0xaeff, 0x01);
 998         if (ret)
 999                 goto err;
1000 
1001         /* Wait reset performs */
1002         ret = regmap_read_poll_timeout(state->regmap, 0xd417, utmp,
1003                                        (utmp >> 1) & 0x01, 5000, 1000000);
1004         if (ret)
1005                 goto err;
1006 
1007         if (!((utmp >> 1) & 0x01)) {
1008                 ret = -ETIMEDOUT;
1009                 goto err;
1010         }
1011 
1012         /* ADC off */
1013         ret = regmap_update_bits(state->regmap, 0xd73a, 0x08, 0x08);
1014         if (ret)
1015                 goto err;
1016 
1017         return 0;
1018 err:
1019         dev_dbg(&client->dev, "failed %d\n", ret);
1020         return ret;
1021 }
1022 
1023 static const struct dvb_frontend_ops af9013_ops;
1024 
1025 static int af9013_download_firmware(struct af9013_state *state)
1026 {
1027         struct i2c_client *client = state->client;
1028         int ret, i, len, rem;
1029         unsigned int utmp;
1030         u8 buf[4];
1031         u16 checksum = 0;
1032         const struct firmware *firmware;
1033         const char *name = AF9013_FIRMWARE;
1034 
1035         dev_dbg(&client->dev, "\n");
1036 
1037         /* Check whether firmware is already running */
1038         ret = regmap_read(state->regmap, 0x98be, &utmp);
1039         if (ret)
1040                 goto err;
1041 
1042         dev_dbg(&client->dev, "firmware status %02x\n", utmp);
1043 
1044         if (utmp == 0x0c)
1045                 return 0;
1046 
1047         dev_info(&client->dev, "found a '%s' in cold state, will try to load a firmware\n",
1048                  af9013_ops.info.name);
1049 
1050         /* Request the firmware, will block and timeout */
1051         ret = request_firmware(&firmware, name, &client->dev);
1052         if (ret) {
1053                 dev_info(&client->dev, "firmware file '%s' not found %d\n",
1054                          name, ret);
1055                 goto err;
1056         }
1057 
1058         dev_info(&client->dev, "downloading firmware from file '%s'\n",
1059                  name);
1060 
1061         /* Write firmware checksum & size */
1062         for (i = 0; i < firmware->size; i++)
1063                 checksum += firmware->data[i];
1064 
1065         buf[0] = (checksum >> 8) & 0xff;
1066         buf[1] = (checksum >> 0) & 0xff;
1067         buf[2] = (firmware->size >> 8) & 0xff;
1068         buf[3] = (firmware->size >> 0) & 0xff;
1069         ret = regmap_bulk_write(state->regmap, 0x50fc, buf, 4);
1070         if (ret)
1071                 goto err_release_firmware;
1072 
1073         /* Download firmware */
1074         #define LEN_MAX 16
1075         for (rem = firmware->size; rem > 0; rem -= LEN_MAX) {
1076                 len = min(LEN_MAX, rem);
1077                 ret = regmap_bulk_write(state->regmap,
1078                                         0x5100 + firmware->size - rem,
1079                                         &firmware->data[firmware->size - rem],
1080                                         len);
1081                 if (ret) {
1082                         dev_err(&client->dev, "firmware download failed %d\n",
1083                                 ret);
1084                         goto err_release_firmware;
1085                 }
1086         }
1087 
1088         release_firmware(firmware);
1089 
1090         /* Boot firmware */
1091         ret = regmap_write(state->regmap, 0xe205, 0x01);
1092         if (ret)
1093                 goto err;
1094 
1095         /* Check firmware status. 0c=OK, 04=fail */
1096         ret = regmap_read_poll_timeout(state->regmap, 0x98be, utmp,
1097                                        (utmp == 0x0c || utmp == 0x04),
1098                                        5000, 1000000);
1099         if (ret)
1100                 goto err;
1101 
1102         dev_dbg(&client->dev, "firmware status %02x\n", utmp);
1103 
1104         if (utmp == 0x04) {
1105                 ret = -ENODEV;
1106                 dev_err(&client->dev, "firmware did not run\n");
1107                 goto err;
1108         } else if (utmp != 0x0c) {
1109                 ret = -ENODEV;
1110                 dev_err(&client->dev, "firmware boot timeout\n");
1111                 goto err;
1112         }
1113 
1114         dev_info(&client->dev, "found a '%s' in warm state\n",
1115                  af9013_ops.info.name);
1116 
1117         return 0;
1118 err_release_firmware:
1119         release_firmware(firmware);
1120 err:
1121         dev_dbg(&client->dev, "failed %d\n", ret);
1122         return ret;
1123 }
1124 
1125 static const struct dvb_frontend_ops af9013_ops = {
1126         .delsys = { SYS_DVBT },
1127         .info = {
1128                 .name = "Afatech AF9013",
1129                 .frequency_min_hz = 174 * MHz,
1130                 .frequency_max_hz = 862 * MHz,
1131                 .frequency_stepsize_hz = 250 * kHz,
1132                 .caps = FE_CAN_FEC_1_2 |
1133                         FE_CAN_FEC_2_3 |
1134                         FE_CAN_FEC_3_4 |
1135                         FE_CAN_FEC_5_6 |
1136                         FE_CAN_FEC_7_8 |
1137                         FE_CAN_FEC_AUTO |
1138                         FE_CAN_QPSK |
1139                         FE_CAN_QAM_16 |
1140                         FE_CAN_QAM_64 |
1141                         FE_CAN_QAM_AUTO |
1142                         FE_CAN_TRANSMISSION_MODE_AUTO |
1143                         FE_CAN_GUARD_INTERVAL_AUTO |
1144                         FE_CAN_HIERARCHY_AUTO |
1145                         FE_CAN_RECOVER |
1146                         FE_CAN_MUTE_TS
1147         },
1148 
1149         .init = af9013_init,
1150         .sleep = af9013_sleep,
1151 
1152         .get_tune_settings = af9013_get_tune_settings,
1153         .set_frontend = af9013_set_frontend,
1154         .get_frontend = af9013_get_frontend,
1155 
1156         .read_status = af9013_read_status,
1157         .read_snr = af9013_read_snr,
1158         .read_signal_strength = af9013_read_signal_strength,
1159         .read_ber = af9013_read_ber,
1160         .read_ucblocks = af9013_read_ucblocks,
1161 };
1162 
1163 static int af9013_pid_filter_ctrl(struct dvb_frontend *fe, int onoff)
1164 {
1165         struct af9013_state *state = fe->demodulator_priv;
1166         struct i2c_client *client = state->client;
1167         int ret;
1168 
1169         dev_dbg(&client->dev, "onoff %d\n", onoff);
1170 
1171         ret = regmap_update_bits(state->regmap, 0xd503, 0x01, onoff);
1172         if (ret)
1173                 goto err;
1174 
1175         return 0;
1176 err:
1177         dev_dbg(&client->dev, "failed %d\n", ret);
1178         return ret;
1179 }
1180 
1181 static int af9013_pid_filter(struct dvb_frontend *fe, u8 index, u16 pid,
1182                              int onoff)
1183 {
1184         struct af9013_state *state = fe->demodulator_priv;
1185         struct i2c_client *client = state->client;
1186         int ret;
1187         u8 buf[2];
1188 
1189         dev_dbg(&client->dev, "index %d, pid %04x, onoff %d\n",
1190                 index, pid, onoff);
1191 
1192         if (pid > 0x1fff) {
1193                 /* 0x2000 is kernel virtual pid for whole ts (all pids) */
1194                 ret = 0;
1195                 goto err;
1196         }
1197 
1198         buf[0] = (pid >> 0) & 0xff;
1199         buf[1] = (pid >> 8) & 0xff;
1200         ret = regmap_bulk_write(state->regmap, 0xd505, buf, 2);
1201         if (ret)
1202                 goto err;
1203         ret = regmap_write(state->regmap, 0xd504, onoff << 5 | index << 0);
1204         if (ret)
1205                 goto err;
1206 
1207         return 0;
1208 err:
1209         dev_dbg(&client->dev, "failed %d\n", ret);
1210         return ret;
1211 }
1212 
1213 static struct dvb_frontend *af9013_get_dvb_frontend(struct i2c_client *client)
1214 {
1215         struct af9013_state *state = i2c_get_clientdata(client);
1216 
1217         dev_dbg(&client->dev, "\n");
1218 
1219         return &state->fe;
1220 }
1221 
1222 static struct i2c_adapter *af9013_get_i2c_adapter(struct i2c_client *client)
1223 {
1224         struct af9013_state *state = i2c_get_clientdata(client);
1225 
1226         dev_dbg(&client->dev, "\n");
1227 
1228         return state->muxc->adapter[0];
1229 }
1230 
1231 /*
1232  * XXX: Hackish solution. We use virtual register, reg bit 16, to carry info
1233  * about i2c adapter locking. Own locking is needed because i2c mux call has
1234  * already locked i2c adapter.
1235  */
1236 static int af9013_select(struct i2c_mux_core *muxc, u32 chan)
1237 {
1238         struct af9013_state *state = i2c_mux_priv(muxc);
1239         struct i2c_client *client = state->client;
1240         int ret;
1241 
1242         dev_dbg(&client->dev, "\n");
1243 
1244         if (state->ts_mode == AF9013_TS_MODE_USB)
1245                 ret = regmap_update_bits(state->regmap, 0x1d417, 0x08, 0x08);
1246         else
1247                 ret = regmap_update_bits(state->regmap, 0x1d607, 0x04, 0x04);
1248         if (ret)
1249                 goto err;
1250 
1251         return 0;
1252 err:
1253         dev_dbg(&client->dev, "failed %d\n", ret);
1254         return ret;
1255 }
1256 
1257 static int af9013_deselect(struct i2c_mux_core *muxc, u32 chan)
1258 {
1259         struct af9013_state *state = i2c_mux_priv(muxc);
1260         struct i2c_client *client = state->client;
1261         int ret;
1262 
1263         dev_dbg(&client->dev, "\n");
1264 
1265         if (state->ts_mode == AF9013_TS_MODE_USB)
1266                 ret = regmap_update_bits(state->regmap, 0x1d417, 0x08, 0x00);
1267         else
1268                 ret = regmap_update_bits(state->regmap, 0x1d607, 0x04, 0x00);
1269         if (ret)
1270                 goto err;
1271 
1272         return 0;
1273 err:
1274         dev_dbg(&client->dev, "failed %d\n", ret);
1275         return ret;
1276 }
1277 
1278 /* Own I2C access routines needed for regmap as chip uses extra command byte */
1279 static int af9013_wregs(struct i2c_client *client, u8 cmd, u16 reg,
1280                         const u8 *val, int len, u8 lock)
1281 {
1282         int ret;
1283         u8 buf[21];
1284         struct i2c_msg msg[1] = {
1285                 {
1286                         .addr = client->addr,
1287                         .flags = 0,
1288                         .len = 3 + len,
1289                         .buf = buf,
1290                 }
1291         };
1292 
1293         if (3 + len > sizeof(buf)) {
1294                 ret = -EINVAL;
1295                 goto err;
1296         }
1297 
1298         buf[0] = (reg >> 8) & 0xff;
1299         buf[1] = (reg >> 0) & 0xff;
1300         buf[2] = cmd;
1301         memcpy(&buf[3], val, len);
1302 
1303         if (lock)
1304                 i2c_lock_bus(client->adapter, I2C_LOCK_SEGMENT);
1305         ret = __i2c_transfer(client->adapter, msg, 1);
1306         if (lock)
1307                 i2c_unlock_bus(client->adapter, I2C_LOCK_SEGMENT);
1308         if (ret < 0) {
1309                 goto err;
1310         } else if (ret != 1) {
1311                 ret = -EREMOTEIO;
1312                 goto err;
1313         }
1314 
1315         return 0;
1316 err:
1317         dev_dbg(&client->dev, "failed %d\n", ret);
1318         return ret;
1319 }
1320 
1321 static int af9013_rregs(struct i2c_client *client, u8 cmd, u16 reg,
1322                         u8 *val, int len, u8 lock)
1323 {
1324         int ret;
1325         u8 buf[3];
1326         struct i2c_msg msg[2] = {
1327                 {
1328                         .addr = client->addr,
1329                         .flags = 0,
1330                         .len = 3,
1331                         .buf = buf,
1332                 }, {
1333                         .addr = client->addr,
1334                         .flags = I2C_M_RD,
1335                         .len = len,
1336                         .buf = val,
1337                 }
1338         };
1339 
1340         buf[0] = (reg >> 8) & 0xff;
1341         buf[1] = (reg >> 0) & 0xff;
1342         buf[2] = cmd;
1343 
1344         if (lock)
1345                 i2c_lock_bus(client->adapter, I2C_LOCK_SEGMENT);
1346         ret = __i2c_transfer(client->adapter, msg, 2);
1347         if (lock)
1348                 i2c_unlock_bus(client->adapter, I2C_LOCK_SEGMENT);
1349         if (ret < 0) {
1350                 goto err;
1351         } else if (ret != 2) {
1352                 ret = -EREMOTEIO;
1353                 goto err;
1354         }
1355 
1356         return 0;
1357 err:
1358         dev_dbg(&client->dev, "failed %d\n", ret);
1359         return ret;
1360 }
1361 
1362 static int af9013_regmap_write(void *context, const void *data, size_t count)
1363 {
1364         struct i2c_client *client = context;
1365         struct af9013_state *state = i2c_get_clientdata(client);
1366         int ret, i;
1367         u8 cmd;
1368         u8 lock = !((u8 *)data)[0];
1369         u16 reg = ((u8 *)data)[1] << 8 | ((u8 *)data)[2] << 0;
1370         u8 *val = &((u8 *)data)[3];
1371         const unsigned int len = count - 3;
1372 
1373         if (state->ts_mode == AF9013_TS_MODE_USB && (reg & 0xff00) != 0xae00) {
1374                 cmd = 0 << 7|0 << 6|(len - 1) << 2|1 << 1|1 << 0;
1375                 ret = af9013_wregs(client, cmd, reg, val, len, lock);
1376                 if (ret)
1377                         goto err;
1378         } else if (reg >= 0x5100 && reg < 0x8fff) {
1379                 /* Firmware download */
1380                 cmd = 1 << 7|1 << 6|(len - 1) << 2|1 << 1|1 << 0;
1381                 ret = af9013_wregs(client, cmd, reg, val, len, lock);
1382                 if (ret)
1383                         goto err;
1384         } else {
1385                 cmd = 0 << 7|0 << 6|(1 - 1) << 2|1 << 1|1 << 0;
1386                 for (i = 0; i < len; i++) {
1387                         ret = af9013_wregs(client, cmd, reg + i, val + i, 1,
1388                                            lock);
1389                         if (ret)
1390                                 goto err;
1391                 }
1392         }
1393 
1394         return 0;
1395 err:
1396         dev_dbg(&client->dev, "failed %d\n", ret);
1397         return ret;
1398 }
1399 
1400 static int af9013_regmap_read(void *context, const void *reg_buf,
1401                               size_t reg_size, void *val_buf, size_t val_size)
1402 {
1403         struct i2c_client *client = context;
1404         struct af9013_state *state = i2c_get_clientdata(client);
1405         int ret, i;
1406         u8 cmd;
1407         u8 lock = !((u8 *)reg_buf)[0];
1408         u16 reg = ((u8 *)reg_buf)[1] << 8 | ((u8 *)reg_buf)[2] << 0;
1409         u8 *val = &((u8 *)val_buf)[0];
1410         const unsigned int len = val_size;
1411 
1412         if (state->ts_mode == AF9013_TS_MODE_USB && (reg & 0xff00) != 0xae00) {
1413                 cmd = 0 << 7|0 << 6|(len - 1) << 2|1 << 1|0 << 0;
1414                 ret = af9013_rregs(client, cmd, reg, val_buf, len, lock);
1415                 if (ret)
1416                         goto err;
1417         } else {
1418                 cmd = 0 << 7|0 << 6|(1 - 1) << 2|1 << 1|0 << 0;
1419                 for (i = 0; i < len; i++) {
1420                         ret = af9013_rregs(client, cmd, reg + i, val + i, 1,
1421                                            lock);
1422                         if (ret)
1423                                 goto err;
1424                 }
1425         }
1426 
1427         return 0;
1428 err:
1429         dev_dbg(&client->dev, "failed %d\n", ret);
1430         return ret;
1431 }
1432 
1433 static int af9013_probe(struct i2c_client *client,
1434                         const struct i2c_device_id *id)
1435 {
1436         struct af9013_state *state;
1437         struct af9013_platform_data *pdata = client->dev.platform_data;
1438         struct dtv_frontend_properties *c;
1439         int ret, i;
1440         u8 firmware_version[4];
1441         static const struct regmap_bus regmap_bus = {
1442                 .read = af9013_regmap_read,
1443                 .write = af9013_regmap_write,
1444         };
1445         static const struct regmap_config regmap_config = {
1446                 /* Actual reg is 16 bits, see i2c adapter lock */
1447                 .reg_bits = 24,
1448                 .val_bits = 8,
1449         };
1450 
1451         state = kzalloc(sizeof(*state), GFP_KERNEL);
1452         if (!state) {
1453                 ret = -ENOMEM;
1454                 goto err;
1455         }
1456 
1457         dev_dbg(&client->dev, "\n");
1458 
1459         /* Setup the state */
1460         state->client = client;
1461         i2c_set_clientdata(client, state);
1462         state->clk = pdata->clk;
1463         state->tuner = pdata->tuner;
1464         state->if_frequency = pdata->if_frequency;
1465         state->ts_mode = pdata->ts_mode;
1466         state->ts_output_pin = pdata->ts_output_pin;
1467         state->spec_inv = pdata->spec_inv;
1468         memcpy(&state->api_version, pdata->api_version, sizeof(state->api_version));
1469         memcpy(&state->gpio, pdata->gpio, sizeof(state->gpio));
1470         state->regmap = regmap_init(&client->dev, &regmap_bus, client,
1471                                   &regmap_config);
1472         if (IS_ERR(state->regmap)) {
1473                 ret = PTR_ERR(state->regmap);
1474                 goto err_kfree;
1475         }
1476         /* Create mux i2c adapter */
1477         state->muxc = i2c_mux_alloc(client->adapter, &client->dev, 1, 0, 0,
1478                                     af9013_select, af9013_deselect);
1479         if (!state->muxc) {
1480                 ret = -ENOMEM;
1481                 goto err_regmap_exit;
1482         }
1483         state->muxc->priv = state;
1484         ret = i2c_mux_add_adapter(state->muxc, 0, 0, 0);
1485         if (ret)
1486                 goto err_regmap_exit;
1487 
1488         /* Download firmware */
1489         if (state->ts_mode != AF9013_TS_MODE_USB) {
1490                 ret = af9013_download_firmware(state);
1491                 if (ret)
1492                         goto err_i2c_mux_del_adapters;
1493         }
1494 
1495         /* Firmware version */
1496         ret = regmap_bulk_read(state->regmap, 0x5103, firmware_version,
1497                                sizeof(firmware_version));
1498         if (ret)
1499                 goto err_i2c_mux_del_adapters;
1500 
1501         /* Set GPIOs */
1502         for (i = 0; i < sizeof(state->gpio); i++) {
1503                 ret = af9013_set_gpio(state, i, state->gpio[i]);
1504                 if (ret)
1505                         goto err_i2c_mux_del_adapters;
1506         }
1507 
1508         /* Create dvb frontend */
1509         memcpy(&state->fe.ops, &af9013_ops, sizeof(state->fe.ops));
1510         state->fe.demodulator_priv = state;
1511 
1512         /* Setup callbacks */
1513         pdata->get_dvb_frontend = af9013_get_dvb_frontend;
1514         pdata->get_i2c_adapter = af9013_get_i2c_adapter;
1515         pdata->pid_filter = af9013_pid_filter;
1516         pdata->pid_filter_ctrl = af9013_pid_filter_ctrl;
1517 
1518         /* Init stats to indicate which stats are supported */
1519         c = &state->fe.dtv_property_cache;
1520         c->strength.len = 1;
1521         c->cnr.len = 1;
1522         c->post_bit_error.len = 1;
1523         c->post_bit_count.len = 1;
1524         c->block_error.len = 1;
1525         c->block_count.len = 1;
1526 
1527         dev_info(&client->dev, "Afatech AF9013 successfully attached\n");
1528         dev_info(&client->dev, "firmware version: %d.%d.%d.%d\n",
1529                  firmware_version[0], firmware_version[1],
1530                  firmware_version[2], firmware_version[3]);
1531         return 0;
1532 err_i2c_mux_del_adapters:
1533         i2c_mux_del_adapters(state->muxc);
1534 err_regmap_exit:
1535         regmap_exit(state->regmap);
1536 err_kfree:
1537         kfree(state);
1538 err:
1539         dev_dbg(&client->dev, "failed %d\n", ret);
1540         return ret;
1541 }
1542 
1543 static int af9013_remove(struct i2c_client *client)
1544 {
1545         struct af9013_state *state = i2c_get_clientdata(client);
1546 
1547         dev_dbg(&client->dev, "\n");
1548 
1549         i2c_mux_del_adapters(state->muxc);
1550 
1551         regmap_exit(state->regmap);
1552 
1553         kfree(state);
1554 
1555         return 0;
1556 }
1557 
1558 static const struct i2c_device_id af9013_id_table[] = {
1559         {"af9013", 0},
1560         {}
1561 };
1562 MODULE_DEVICE_TABLE(i2c, af9013_id_table);
1563 
1564 static struct i2c_driver af9013_driver = {
1565         .driver = {
1566                 .name   = "af9013",
1567                 .suppress_bind_attrs = true,
1568         },
1569         .probe          = af9013_probe,
1570         .remove         = af9013_remove,
1571         .id_table       = af9013_id_table,
1572 };
1573 
1574 module_i2c_driver(af9013_driver);
1575 
1576 MODULE_AUTHOR("Antti Palosaari <crope@iki.fi>");
1577 MODULE_DESCRIPTION("Afatech AF9013 DVB-T demodulator driver");
1578 MODULE_LICENSE("GPL");
1579 MODULE_FIRMWARE(AF9013_FIRMWARE);