drivers/media/dvb-frontends/mn88473.c

   1 // SPDX-License-Identifier: GPL-2.0-or-later
   2 /*
   3  * Panasonic MN88473 DVB-T/T2/C demodulator driver
   4  *
   5  * Copyright (C) 2014 Antti Palosaari <[email protected]>
   6  */
   7
   8 #include "mn88473_priv.h"
   9
  10 static int mn88473_get_tune_settings(struct dvb_frontend *fe,
  11                                      struct dvb_frontend_tune_settings *s)
  12 {
  13         s->min_delay_ms = 1000;
  14         return 0;
  15 }
  16
  17 static int mn88473_set_frontend(struct dvb_frontend *fe)
  18 {
  19         struct i2c_client *client = fe->demodulator_priv;
  20         struct mn88473_dev *dev = i2c_get_clientdata(client);
  21         struct dtv_frontend_properties *c = &fe->dtv_property_cache;
  22         int ret, i;
  23         unsigned int uitmp;
  24         u32 if_frequency;
  25         u8 delivery_system_val, if_val[3], *conf_val_ptr;
  26         u8 reg_bank2_2d_val, reg_bank0_d2_val;
  27
  28         dev_dbg(&client->dev,
  29                 "delivery_system=%u modulation=%u frequency=%u bandwidth_hz=%u symbol_rate=%u inversion=%d stream_id=%d\n",
  30                 c->delivery_system, c->modulation, c->frequency,
  31                 c->bandwidth_hz, c->symbol_rate, c->inversion, c->stream_id);
  32
  33         if (!dev->active) {
  34                 ret = -EAGAIN;
  35                 goto err;
  36         }
  37
  38         switch (c->delivery_system) {
  39         case SYS_DVBT:
  40                 delivery_system_val = 0x02;
  41                 reg_bank2_2d_val = 0x23;
  42                 reg_bank0_d2_val = 0x2a;
  43                 break;
  44         case SYS_DVBT2:
  45                 delivery_system_val = 0x03;
  46                 reg_bank2_2d_val = 0x3b;
  47                 reg_bank0_d2_val = 0x29;
  48                 break;
  49         case SYS_DVBC_ANNEX_A:
  50                 delivery_system_val = 0x04;
  51                 reg_bank2_2d_val = 0x3b;
  52                 reg_bank0_d2_val = 0x29;
  53                 break;
  54         default:
  55                 ret = -EINVAL;
  56                 goto err;
  57         }
  58
  59         switch (c->delivery_system) {
  60         case SYS_DVBT:
  61         case SYS_DVBT2:
  62                 switch (c->bandwidth_hz) {
  63                 case 6000000:
  64                         conf_val_ptr = "\xe9\x55\x55\x1c\x29\x1c\x29";
  65                         break;
  66                 case 7000000:
  67                         conf_val_ptr = "\xc8\x00\x00\x17\x0a\x17\x0a";
  68                         break;
  69                 case 8000000:
  70                         conf_val_ptr = "\xaf\x00\x00\x11\xec\x11\xec";
  71                         break;
  72                 default:
  73                         ret = -EINVAL;
  74                         goto err;
  75                 }
  76                 break;
  77         case SYS_DVBC_ANNEX_A:
  78                 conf_val_ptr = "\x10\xab\x0d\xae\x1d\x9d";
  79                 break;
  80         default:
  81                 break;
  82         }
  83
  84         /* Program tuner */
  85         if (fe->ops.tuner_ops.set_params) {
  86                 ret = fe->ops.tuner_ops.set_params(fe);
  87                 if (ret)
  88                         goto err;
  89         }
  90
  91         if (fe->ops.tuner_ops.get_if_frequency) {
  92                 ret = fe->ops.tuner_ops.get_if_frequency(fe, &if_frequency);
  93                 if (ret)
  94                         goto err;
  95
  96                 dev_dbg(&client->dev, "get_if_frequency=%u\n", if_frequency);
  97         } else {
  98                 ret = -EINVAL;
  99                 goto err;
 100         }
 101
 102         /* Calculate IF registers */
 103         uitmp = DIV_ROUND_CLOSEST_ULL((u64) if_frequency * 0x1000000, dev->clk);
 104         if_val[0] = (uitmp >> 16) & 0xff;
 105         if_val[1] = (uitmp >>  8) & 0xff;
 106         if_val[2] = (uitmp >>  0) & 0xff;
 107
 108         ret = regmap_write(dev->regmap[2], 0x05, 0x00);
 109         if (ret)
 110                 goto err;
 111         ret = regmap_write(dev->regmap[2], 0xfb, 0x13);
 112         if (ret)
 113                 goto err;
 114         ret = regmap_write(dev->regmap[2], 0xef, 0x13);
 115         if (ret)
 116                 goto err;
 117         ret = regmap_write(dev->regmap[2], 0xf9, 0x13);
 118         if (ret)
 119                 goto err;
 120         ret = regmap_write(dev->regmap[2], 0x00, 0x18);
 121         if (ret)
 122                 goto err;
 123         ret = regmap_write(dev->regmap[2], 0x01, 0x01);
 124         if (ret)
 125                 goto err;
 126         ret = regmap_write(dev->regmap[2], 0x02, 0x21);
 127         if (ret)
 128                 goto err;
 129         ret = regmap_write(dev->regmap[2], 0x03, delivery_system_val);
 130         if (ret)
 131                 goto err;
 132         ret = regmap_write(dev->regmap[2], 0x0b, 0x00);
 133         if (ret)
 134                 goto err;
 135
 136         for (i = 0; i < sizeof(if_val); i++) {
 137                 ret = regmap_write(dev->regmap[2], 0x10 + i, if_val[i]);
 138                 if (ret)
 139                         goto err;
 140         }
 141
 142         switch (c->delivery_system) {
 143         case SYS_DVBT:
 144         case SYS_DVBT2:
 145                 for (i = 0; i < 7; i++) {
 146                         ret = regmap_write(dev->regmap[2], 0x13 + i,
 147                                            conf_val_ptr[i]);
 148                         if (ret)
 149                                 goto err;
 150                 }
 151                 break;
 152         case SYS_DVBC_ANNEX_A:
 153                 ret = regmap_bulk_write(dev->regmap[1], 0x10, conf_val_ptr, 6);
 154                 if (ret)
 155                         goto err;
 156                 break;
 157         default:
 158                 break;
 159         }
 160
 161         ret = regmap_write(dev->regmap[2], 0x2d, reg_bank2_2d_val);
 162         if (ret)
 163                 goto err;
 164         ret = regmap_write(dev->regmap[2], 0x2e, 0x00);
 165         if (ret)
 166                 goto err;
 167         ret = regmap_write(dev->regmap[2], 0x56, 0x0d);
 168         if (ret)
 169                 goto err;
 170         ret = regmap_bulk_write(dev->regmap[0], 0x01,
 171                                 "\xba\x13\x80\xba\x91\xdd\xe7\x28", 8);
 172         if (ret)
 173                 goto err;
 174         ret = regmap_write(dev->regmap[0], 0x0a, 0x1a);
 175         if (ret)
 176                 goto err;
 177         ret = regmap_write(dev->regmap[0], 0x13, 0x1f);
 178         if (ret)
 179                 goto err;
 180         ret = regmap_write(dev->regmap[0], 0x19, 0x03);
 181         if (ret)
 182                 goto err;
 183         ret = regmap_write(dev->regmap[0], 0x1d, 0xb0);
 184         if (ret)
 185                 goto err;
 186         ret = regmap_write(dev->regmap[0], 0x2a, 0x72);
 187         if (ret)
 188                 goto err;
 189         ret = regmap_write(dev->regmap[0], 0x2d, 0x00);
 190         if (ret)
 191                 goto err;
 192         ret = regmap_write(dev->regmap[0], 0x3c, 0x00);
 193         if (ret)
 194                 goto err;
 195         ret = regmap_write(dev->regmap[0], 0x3f, 0xf8);
 196         if (ret)
 197                 goto err;
 198         ret = regmap_bulk_write(dev->regmap[0], 0x40, "\xf4\x08", 2);
 199         if (ret)
 200                 goto err;
 201         ret = regmap_write(dev->regmap[0], 0xd2, reg_bank0_d2_val);
 202         if (ret)
 203                 goto err;
 204         ret = regmap_write(dev->regmap[0], 0xd4, 0x55);
 205         if (ret)
 206                 goto err;
 207         ret = regmap_write(dev->regmap[1], 0xbe, 0x08);
 208         if (ret)
 209                 goto err;
 210         ret = regmap_write(dev->regmap[0], 0xb2, 0x37);
 211         if (ret)
 212                 goto err;
 213         ret = regmap_write(dev->regmap[0], 0xd7, 0x04);
 214         if (ret)
 215                 goto err;
 216
 217         /* PLP */
 218         if (c->delivery_system == SYS_DVBT2) {
 219                 ret = regmap_write(dev->regmap[2], 0x36,
 220                                 (c->stream_id == NO_STREAM_ID_FILTER) ? 0 :
 221                                 c->stream_id );
 222                 if (ret)
 223                         goto err;
 224         }
 225
 226         /* Reset FSM */
 227         ret = regmap_write(dev->regmap[2], 0xf8, 0x9f);
 228         if (ret)
 229                 goto err;
 230
 231         return 0;
 232 err:
 233         dev_dbg(&client->dev, "failed=%d\n", ret);
 234         return ret;
 235 }
 236
 237 static int mn88473_read_status(struct dvb_frontend *fe, enum fe_status *status)
 238 {
 239         struct i2c_client *client = fe->demodulator_priv;
 240         struct mn88473_dev *dev = i2c_get_clientdata(client);
 241         struct dtv_frontend_properties *c = &fe->dtv_property_cache;
 242         int ret, i, stmp;
 243         unsigned int utmp, utmp1, utmp2;
 244         u8 buf[5];
 245
 246         if (!dev->active) {
 247                 ret = -EAGAIN;
 248                 goto err;
 249         }
 250
 251         /* Lock detection */
 252         switch (c->delivery_system) {
 253         case SYS_DVBT:
 254                 ret = regmap_read(dev->regmap[0], 0x62, &utmp);
 255                 if (ret)
 256                         goto err;
 257
 258                 if (!(utmp & 0xa0)) {
 259                         if ((utmp & 0x0f) >= 0x09)
 260                                 *status = FE_HAS_SIGNAL | FE_HAS_CARRIER |
 261                                           FE_HAS_VITERBI | FE_HAS_SYNC |
 262                                           FE_HAS_LOCK;
 263                         else if ((utmp & 0x0f) >= 0x03)
 264                                 *status = FE_HAS_SIGNAL | FE_HAS_CARRIER;
 265                 } else {
 266                         *status = 0;
 267                 }
 268                 break;
 269         case SYS_DVBT2:
 270                 ret = regmap_read(dev->regmap[2], 0x8b, &utmp);
 271                 if (ret)
 272                         goto err;
 273
 274                 if (!(utmp & 0x40)) {
 275                         if ((utmp & 0x0f) >= 0x0d)
 276                                 *status = FE_HAS_SIGNAL | FE_HAS_CARRIER |
 277                                           FE_HAS_VITERBI | FE_HAS_SYNC |
 278                                           FE_HAS_LOCK;
 279                         else if ((utmp & 0x0f) >= 0x0a)
 280                                 *status = FE_HAS_SIGNAL | FE_HAS_CARRIER |
 281                                           FE_HAS_VITERBI;
 282                         else if ((utmp & 0x0f) >= 0x07)
 283                                 *status = FE_HAS_SIGNAL | FE_HAS_CARRIER;
 284                 } else {
 285                         *status = 0;
 286                 }
 287                 break;
 288         case SYS_DVBC_ANNEX_A:
 289                 ret = regmap_read(dev->regmap[1], 0x85, &utmp);
 290                 if (ret)
 291                         goto err;
 292
 293                 if (!(utmp & 0x40)) {
 294                         ret = regmap_read(dev->regmap[1], 0x89, &utmp);
 295                         if (ret)
 296                                 goto err;
 297
 298                         if (utmp & 0x01)
 299                                 *status = FE_HAS_SIGNAL | FE_HAS_CARRIER |
 300                                                 FE_HAS_VITERBI | FE_HAS_SYNC |
 301                                                 FE_HAS_LOCK;
 302                 } else {
 303                         *status = 0;
 304                 }
 305                 break;
 306         default:
 307                 ret = -EINVAL;
 308                 goto err;
 309         }
 310
 311         /* Signal strength */
 312         if (*status & FE_HAS_SIGNAL) {
 313                 for (i = 0; i < 2; i++) {
 314                         ret = regmap_bulk_read(dev->regmap[2], 0x86 + i,
 315                                                &buf[i], 1);
 316                         if (ret)
 317                                 goto err;
 318                 }
 319
 320                 /* AGCRD[15:6] gives us a 10bit value ([5:0] are always 0) */
 321                 utmp1 = buf[0] << 8 | buf[1] << 0 | buf[0] >> 2;
 322                 dev_dbg(&client->dev, "strength=%u\n", utmp1);
 323
 324                 c->strength.stat[0].scale = FE_SCALE_RELATIVE;
 325                 c->strength.stat[0].uvalue = utmp1;
 326         } else {
 327                 c->strength.stat[0].scale = FE_SCALE_NOT_AVAILABLE;
 328         }
 329
 330         /* CNR */
 331         if (*status & FE_HAS_VITERBI && c->delivery_system == SYS_DVBT) {
 332                 /* DVB-T CNR */
 333                 ret = regmap_bulk_read(dev->regmap[0], 0x8f, buf, 2);
 334                 if (ret)
 335                         goto err;
 336
 337                 utmp = buf[0] << 8 | buf[1] << 0;
 338                 if (utmp) {
 339                         /* CNR[dB]: 10 * (log10(65536 / value) + 0.2) */
 340                         /* log10(65536) = 80807124, 0.2 = 3355443 */
 341                         stmp = div_u64(((u64)80807124 - intlog10(utmp)
 342                                         + 3355443) * 10000, 1 << 24);
 343                         dev_dbg(&client->dev, "cnr=%d value=%u\n", stmp, utmp);
 344                 } else {
 345                         stmp = 0;
 346                 }
 347
 348                 c->cnr.stat[0].svalue = stmp;
 349                 c->cnr.stat[0].scale = FE_SCALE_DECIBEL;
 350         } else if (*status & FE_HAS_VITERBI &&
 351                    c->delivery_system == SYS_DVBT2) {
 352                 /* DVB-T2 CNR */
 353                 for (i = 0; i < 3; i++) {
 354                         ret = regmap_bulk_read(dev->regmap[2], 0xb7 + i,
 355                                                &buf[i], 1);
 356                         if (ret)
 357                                 goto err;
 358                 }
 359
 360                 utmp = buf[1] << 8 | buf[2] << 0;
 361                 utmp1 = (buf[0] >> 2) & 0x01; /* 0=SISO, 1=MISO */
 362                 if (utmp) {
 363                         if (utmp1) {
 364                                 /* CNR[dB]: 10 * (log10(16384 / value) - 0.6) */
 365                                 /* log10(16384) = 70706234, 0.6 = 10066330 */
 366                                 stmp = div_u64(((u64)70706234 - intlog10(utmp)
 367                                                 - 10066330) * 10000, 1 << 24);
 368                                 dev_dbg(&client->dev, "cnr=%d value=%u MISO\n",
 369                                         stmp, utmp);
 370                         } else {
 371                                 /* CNR[dB]: 10 * (log10(65536 / value) + 0.2) */
 372                                 /* log10(65536) = 80807124, 0.2 = 3355443 */
 373                                 stmp = div_u64(((u64)80807124 - intlog10(utmp)
 374                                                 + 3355443) * 10000, 1 << 24);
 375                                 dev_dbg(&client->dev, "cnr=%d value=%u SISO\n",
 376                                         stmp, utmp);
 377                         }
 378                 } else {
 379                         stmp = 0;
 380                 }
 381
 382                 c->cnr.stat[0].svalue = stmp;
 383                 c->cnr.stat[0].scale = FE_SCALE_DECIBEL;
 384         } else if (*status & FE_HAS_VITERBI &&
 385                    c->delivery_system == SYS_DVBC_ANNEX_A) {
 386                 /* DVB-C CNR */
 387                 ret = regmap_bulk_read(dev->regmap[1], 0xa1, buf, 4);
 388                 if (ret)
 389                         goto err;
 390
 391                 utmp1 = buf[0] << 8 | buf[1] << 0; /* signal */
 392                 utmp2 = buf[2] << 8 | buf[3] << 0; /* noise */
 393                 if (utmp1 && utmp2) {
 394                         /* CNR[dB]: 10 * log10(8 * (signal / noise)) */
 395                         /* log10(8) = 15151336 */
 396                         stmp = div_u64(((u64)15151336 + intlog10(utmp1)
 397                                         - intlog10(utmp2)) * 10000, 1 << 24);
 398                         dev_dbg(&client->dev, "cnr=%d signal=%u noise=%u\n",
 399                                 stmp, utmp1, utmp2);
 400                 } else {
 401                         stmp = 0;
 402                 }
 403
 404                 c->cnr.stat[0].svalue = stmp;
 405                 c->cnr.stat[0].scale = FE_SCALE_DECIBEL;
 406         } else {
 407                 c->cnr.stat[0].scale = FE_SCALE_NOT_AVAILABLE;
 408         }
 409
 410         /* BER */
 411         if (*status & FE_HAS_LOCK && (c->delivery_system == SYS_DVBT ||
 412                                       c->delivery_system == SYS_DVBC_ANNEX_A)) {
 413                 /* DVB-T & DVB-C BER */
 414                 ret = regmap_bulk_read(dev->regmap[0], 0x92, buf, 5);
 415                 if (ret)
 416                         goto err;
 417
 418                 utmp1 = buf[0] << 16 | buf[1] << 8 | buf[2] << 0;
 419                 utmp2 = buf[3] << 8 | buf[4] << 0;
 420                 utmp2 = utmp2 * 8 * 204;
 421                 dev_dbg(&client->dev, "post_bit_error=%u post_bit_count=%u\n",
 422                         utmp1, utmp2);
 423
 424                 c->post_bit_error.stat[0].scale = FE_SCALE_COUNTER;
 425                 c->post_bit_error.stat[0].uvalue += utmp1;
 426                 c->post_bit_count.stat[0].scale = FE_SCALE_COUNTER;
 427                 c->post_bit_count.stat[0].uvalue += utmp2;
 428         } else {
 429                 c->post_bit_error.stat[0].scale = FE_SCALE_NOT_AVAILABLE;
 430                 c->post_bit_count.stat[0].scale = FE_SCALE_NOT_AVAILABLE;
 431         }
 432
 433         /* PER */
 434         if (*status & FE_HAS_LOCK) {
 435                 ret = regmap_bulk_read(dev->regmap[0], 0xdd, buf, 4);
 436                 if (ret)
 437                         goto err;
 438
 439                 utmp1 = buf[0] << 8 | buf[1] << 0;
 440                 utmp2 = buf[2] << 8 | buf[3] << 0;
 441                 dev_dbg(&client->dev, "block_error=%u block_count=%u\n",
 442                         utmp1, utmp2);
 443
 444                 c->block_error.stat[0].scale = FE_SCALE_COUNTER;
 445                 c->block_error.stat[0].uvalue += utmp1;
 446                 c->block_count.stat[0].scale = FE_SCALE_COUNTER;
 447                 c->block_count.stat[0].uvalue += utmp2;
 448         } else {
 449                 c->block_error.stat[0].scale = FE_SCALE_NOT_AVAILABLE;
 450                 c->block_count.stat[0].scale = FE_SCALE_NOT_AVAILABLE;
 451         }
 452
 453         return 0;
 454 err:
 455         dev_dbg(&client->dev, "failed=%d\n", ret);
 456         return ret;
 457 }
 458
 459 static int mn88473_init(struct dvb_frontend *fe)
 460 {
 461         struct i2c_client *client = fe->demodulator_priv;
 462         struct mn88473_dev *dev = i2c_get_clientdata(client);
 463         struct dtv_frontend_properties *c = &fe->dtv_property_cache;
 464         int ret, len, remain;
 465         unsigned int uitmp;
 466         const struct firmware *fw;
 467         const char *name = MN88473_FIRMWARE;
 468
 469         dev_dbg(&client->dev, "\n");
 470
 471         /* Check if firmware is already running */
 472         ret = regmap_read(dev->regmap[0], 0xf5, &uitmp);
 473         if (ret)
 474                 goto err;
 475
 476         if (!(uitmp & 0x01))
 477                 goto warm;
 478
 479         /* Request the firmware, this will block and timeout */
 480         ret = request_firmware(&fw, name, &client->dev);
 481         if (ret) {
 482                 dev_err(&client->dev, "firmware file '%s' not found\n", name);
 483                 goto err;
 484         }
 485
 486         dev_info(&client->dev, "downloading firmware from file '%s'\n", name);
 487
 488         ret = regmap_write(dev->regmap[0], 0xf5, 0x03);
 489         if (ret)
 490                 goto err_release_firmware;
 491
 492         for (remain = fw->size; remain > 0; remain -= (dev->i2c_wr_max - 1)) {
 493                 len = min(dev->i2c_wr_max - 1, remain);
 494                 ret = regmap_bulk_write(dev->regmap[0], 0xf6,
 495                                         &fw->data[fw->size - remain], len);
 496                 if (ret) {
 497                         dev_err(&client->dev, "firmware download failed %d\n",
 498                                 ret);
 499                         goto err_release_firmware;
 500                 }
 501         }
 502
 503         release_firmware(fw);
 504
 505         /* Parity check of firmware */
 506         ret = regmap_read(dev->regmap[0], 0xf8, &uitmp);
 507         if (ret)
 508                 goto err;
 509
 510         if (uitmp & 0x10) {
 511                 dev_err(&client->dev, "firmware parity check failed\n");
 512                 ret = -EINVAL;
 513                 goto err;
 514         }
 515
 516         ret = regmap_write(dev->regmap[0], 0xf5, 0x00);
 517         if (ret)
 518                 goto err;
 519 warm:
 520         /* TS config */
 521         ret = regmap_write(dev->regmap[2], 0x09, 0x08);
 522         if (ret)
 523                 goto err;
 524         ret = regmap_write(dev->regmap[2], 0x08, 0x1d);
 525         if (ret)
 526                 goto err;
 527
 528         dev->active = true;
 529
 530         /* init stats here to indicate which stats are supported */
 531         c->strength.len = 1;
 532         c->strength.stat[0].scale = FE_SCALE_NOT_AVAILABLE;
 533         c->cnr.len = 1;
 534         c->cnr.stat[0].scale = FE_SCALE_NOT_AVAILABLE;
 535         c->post_bit_error.len = 1;
 536         c->post_bit_error.stat[0].scale = FE_SCALE_NOT_AVAILABLE;
 537         c->post_bit_count.len = 1;
 538         c->post_bit_count.stat[0].scale = FE_SCALE_NOT_AVAILABLE;
 539         c->block_error.len = 1;
 540         c->block_error.stat[0].scale = FE_SCALE_NOT_AVAILABLE;
 541         c->block_count.len = 1;
 542         c->block_count.stat[0].scale = FE_SCALE_NOT_AVAILABLE;
 543
 544         return 0;
 545 err_release_firmware:
 546         release_firmware(fw);
 547 err:
 548         dev_dbg(&client->dev, "failed=%d\n", ret);
 549         return ret;
 550 }
 551
 552 static int mn88473_sleep(struct dvb_frontend *fe)
 553 {
 554         struct i2c_client *client = fe->demodulator_priv;
 555         struct mn88473_dev *dev = i2c_get_clientdata(client);
 556         int ret;
 557
 558         dev_dbg(&client->dev, "\n");
 559
 560         dev->active = false;
 561
 562         ret = regmap_write(dev->regmap[2], 0x05, 0x3e);
 563         if (ret)
 564                 goto err;
 565
 566         return 0;
 567 err:
 568         dev_dbg(&client->dev, "failed=%d\n", ret);
 569         return ret;
 570 }
 571
 572 static const struct dvb_frontend_ops mn88473_ops = {
 573         .delsys = {SYS_DVBT, SYS_DVBT2, SYS_DVBC_ANNEX_A},
 574         .info = {
 575                 .name = "Panasonic MN88473",
 576                 .symbol_rate_min = 1000000,
 577                 .symbol_rate_max = 7200000,
 578                 .caps = FE_CAN_FEC_1_2                 |
 579                         FE_CAN_FEC_2_3                 |
 580                         FE_CAN_FEC_3_4                 |
 581                         FE_CAN_FEC_5_6                 |
 582                         FE_CAN_FEC_7_8                 |
 583                         FE_CAN_FEC_AUTO                |
 584                         FE_CAN_QPSK                    |
 585                         FE_CAN_QAM_16                  |
 586                         FE_CAN_QAM_32                  |
 587                         FE_CAN_QAM_64                  |
 588                         FE_CAN_QAM_128                 |
 589                         FE_CAN_QAM_256                 |
 590                         FE_CAN_QAM_AUTO                |
 591                         FE_CAN_TRANSMISSION_MODE_AUTO  |
 592                         FE_CAN_GUARD_INTERVAL_AUTO     |
 593                         FE_CAN_HIERARCHY_AUTO          |
 594                         FE_CAN_MUTE_TS                 |
 595                         FE_CAN_2G_MODULATION           |
 596                         FE_CAN_MULTISTREAM
 597         },
 598
 599         .get_tune_settings = mn88473_get_tune_settings,
 600
 601         .init = mn88473_init,
 602         .sleep = mn88473_sleep,
 603
 604         .set_frontend = mn88473_set_frontend,
 605
 606         .read_status = mn88473_read_status,
 607 };
 608
 609 static int mn88473_probe(struct i2c_client *client,
 610                          const struct i2c_device_id *id)
 611 {
 612         struct mn88473_config *config = client->dev.platform_data;
 613         struct mn88473_dev *dev;
 614         int ret;
 615         unsigned int uitmp;
 616         static const struct regmap_config regmap_config = {
 617                 .reg_bits = 8,
 618                 .val_bits = 8,
 619         };
 620
 621         dev_dbg(&client->dev, "\n");
 622
 623         /* Caller really need to provide pointer for frontend we create */
 624         if (config->fe == NULL) {
 625                 dev_err(&client->dev, "frontend pointer not defined\n");
 626                 ret = -EINVAL;
 627                 goto err;
 628         }
 629
 630         dev = kzalloc(sizeof(*dev), GFP_KERNEL);
 631         if (dev == NULL) {
 632                 ret = -ENOMEM;
 633                 goto err;
 634         }
 635
 636         if (config->i2c_wr_max)
 637                 dev->i2c_wr_max = config->i2c_wr_max;
 638         else
 639                 dev->i2c_wr_max = ~0;
 640
 641         if (config->xtal)
 642                 dev->clk = config->xtal;
 643         else
 644                 dev->clk = 25000000;
 645         dev->client[0] = client;
 646         dev->regmap[0] = regmap_init_i2c(dev->client[0], &regmap_config);
 647         if (IS_ERR(dev->regmap[0])) {
 648                 ret = PTR_ERR(dev->regmap[0]);
 649                 goto err_kfree;
 650         }
 651
 652         /*
 653          * Chip has three I2C addresses for different register banks. Used
 654          * addresses are 0x18, 0x1a and 0x1c. We register two dummy clients,
 655          * 0x1a and 0x1c, in order to get own I2C client for each register bank.
 656          *
 657          * Also, register bank 2 do not support sequential I/O. Only single
 658          * register write or read is allowed to that bank.
 659          */
 660         dev->client[1] = i2c_new_dummy_device(client->adapter, 0x1a);
 661         if (IS_ERR(dev->client[1])) {
 662                 ret = PTR_ERR(dev->client[1]);
 663                 dev_err(&client->dev, "I2C registration failed\n");
 664                 goto err_regmap_0_regmap_exit;
 665         }
 666         dev->regmap[1] = regmap_init_i2c(dev->client[1], &regmap_config);
 667         if (IS_ERR(dev->regmap[1])) {
 668                 ret = PTR_ERR(dev->regmap[1]);
 669                 goto err_client_1_i2c_unregister_device;
 670         }
 671         i2c_set_clientdata(dev->client[1], dev);
 672
 673         dev->client[2] = i2c_new_dummy_device(client->adapter, 0x1c);
 674         if (IS_ERR(dev->client[2])) {
 675                 ret = PTR_ERR(dev->client[2]);
 676                 dev_err(&client->dev, "2nd I2C registration failed\n");
 677                 goto err_regmap_1_regmap_exit;
 678         }
 679         dev->regmap[2] = regmap_init_i2c(dev->client[2], &regmap_config);
 680         if (IS_ERR(dev->regmap[2])) {
 681                 ret = PTR_ERR(dev->regmap[2]);
 682                 goto err_client_2_i2c_unregister_device;
 683         }
 684         i2c_set_clientdata(dev->client[2], dev);
 685
 686         /* Check demod answers with correct chip id */
 687         ret = regmap_read(dev->regmap[2], 0xff, &uitmp);
 688         if (ret)
 689                 goto err_regmap_2_regmap_exit;
 690
 691         dev_dbg(&client->dev, "chip id=%02x\n", uitmp);
 692
 693         if (uitmp != 0x03) {
 694                 ret = -ENODEV;
 695                 goto err_regmap_2_regmap_exit;
 696         }
 697
 698         /* Sleep because chip is active by default */
 699         ret = regmap_write(dev->regmap[2], 0x05, 0x3e);
 700         if (ret)
 701                 goto err_regmap_2_regmap_exit;
 702
 703         /* Create dvb frontend */
 704         memcpy(&dev->frontend.ops, &mn88473_ops, sizeof(dev->frontend.ops));
 705         dev->frontend.demodulator_priv = client;
 706         *config->fe = &dev->frontend;
 707         i2c_set_clientdata(client, dev);
 708
 709         dev_info(&client->dev, "Panasonic MN88473 successfully identified\n");
 710
 711         return 0;
 712 err_regmap_2_regmap_exit:
 713         regmap_exit(dev->regmap[2]);
 714 err_client_2_i2c_unregister_device:
 715         i2c_unregister_device(dev->client[2]);
 716 err_regmap_1_regmap_exit:
 717         regmap_exit(dev->regmap[1]);
 718 err_client_1_i2c_unregister_device:
 719         i2c_unregister_device(dev->client[1]);
 720 err_regmap_0_regmap_exit:
 721         regmap_exit(dev->regmap[0]);
 722 err_kfree:
 723         kfree(dev);
 724 err:
 725         dev_dbg(&client->dev, "failed=%d\n", ret);
 726         return ret;
 727 }
 728
 729 static int mn88473_remove(struct i2c_client *client)
 730 {
 731         struct mn88473_dev *dev = i2c_get_clientdata(client);
 732
 733         dev_dbg(&client->dev, "\n");
 734
 735         regmap_exit(dev->regmap[2]);
 736         i2c_unregister_device(dev->client[2]);
 737
 738         regmap_exit(dev->regmap[1]);
 739         i2c_unregister_device(dev->client[1]);
 740
 741         regmap_exit(dev->regmap[0]);
 742
 743         kfree(dev);
 744
 745         return 0;
 746 }
 747
 748 static const struct i2c_device_id mn88473_id_table[] = {
 749         {"mn88473", 0},
 750         {}
 751 };
 752 MODULE_DEVICE_TABLE(i2c, mn88473_id_table);
 753
 754 static struct i2c_driver mn88473_driver = {
 755         .driver = {
 756                 .name                = "mn88473",
 757                 .suppress_bind_attrs = true,
 758         },
 759         .probe          = mn88473_probe,
 760         .remove         = mn88473_remove,
 761         .id_table       = mn88473_id_table,
 762 };
 763
 764 module_i2c_driver(mn88473_driver);
 765
 766 MODULE_AUTHOR("Antti Palosaari <[email protected]>");
 767 MODULE_DESCRIPTION("Panasonic MN88473 DVB-T/T2/C demodulator driver");
 768 MODULE_LICENSE("GPL");
 769 MODULE_FIRMWARE(MN88473_FIRMWARE);