drivers/media/dvb-frontends/mn88472.c

   1 /*
   2  * Panasonic MN88472 DVB-T/T2/C demodulator driver
   3  *
   4  * Copyright (C) 2013 Antti Palosaari <crope@iki.fi>
   5  *
   6  *    This program is free software; you can redistribute it and/or modify
   7  *    it under the terms of the GNU General Public License as published by
   8  *    the Free Software Foundation; either version 2 of the License, or
   9  *    (at your option) any later version.
  10  *
  11  *    This program is distributed in the hope that it will be useful,
  12  *    but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  *    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  *    GNU General Public License for more details.
  15  */
  16
  17 #include "mn88472_priv.h"
  18
  19 static int mn88472_get_tune_settings(struct dvb_frontend *fe,
  20                                      struct dvb_frontend_tune_settings *s)
  21 {
  22         s->min_delay_ms = 1000;
  23         return 0;
  24 }
  25
  26 static int mn88472_read_status(struct dvb_frontend *fe, enum fe_status *status)
  27 {
  28         struct i2c_client *client = fe->demodulator_priv;
  29         struct mn88472_dev *dev = i2c_get_clientdata(client);
  30         struct dtv_frontend_properties *c = &fe->dtv_property_cache;
  31         int ret, i;
  32         unsigned int utmp, utmp1;
  33         u8 buf[2];
  34
  35         if (!dev->active) {
  36                 ret = -EAGAIN;
  37                 goto err;
  38         }
  39
  40         switch (c->delivery_system) {
  41         case SYS_DVBT:
  42                 ret = regmap_read(dev->regmap[0], 0x7f, &utmp);
  43                 if (ret)
  44                         goto err;
  45                 if ((utmp & 0x0f) >= 0x09)
  46                         *status = FE_HAS_SIGNAL | FE_HAS_CARRIER |
  47                                   FE_HAS_VITERBI | FE_HAS_SYNC | FE_HAS_LOCK;
  48                 else
  49                         *status = 0;
  50                 break;
  51         case SYS_DVBT2:
  52                 ret = regmap_read(dev->regmap[2], 0x92, &utmp);
  53                 if (ret)
  54                         goto err;
  55                 if ((utmp & 0x0f) >= 0x0d)
  56                         *status = FE_HAS_SIGNAL | FE_HAS_CARRIER |
  57                                   FE_HAS_VITERBI | FE_HAS_SYNC | FE_HAS_LOCK;
  58                 else if ((utmp & 0x0f) >= 0x0a)
  59                         *status = FE_HAS_SIGNAL | FE_HAS_CARRIER |
  60                                   FE_HAS_VITERBI;
  61                 else if ((utmp & 0x0f) >= 0x07)
  62                         *status = FE_HAS_SIGNAL | FE_HAS_CARRIER;
  63                 else
  64                         *status = 0;
  65                 break;
  66         case SYS_DVBC_ANNEX_A:
  67                 ret = regmap_read(dev->regmap[1], 0x84, &utmp);
  68                 if (ret)
  69                         goto err;
  70                 if ((utmp & 0x0f) >= 0x08)
  71                         *status = FE_HAS_SIGNAL | FE_HAS_CARRIER |
  72                                   FE_HAS_VITERBI | FE_HAS_SYNC | FE_HAS_LOCK;
  73                 else
  74                         *status = 0;
  75                 break;
  76         default:
  77                 ret = -EINVAL;
  78                 goto err;
  79         }
  80
  81         /* Signal strength */
  82         if (*status & FE_HAS_SIGNAL) {
  83                 for (i = 0; i < 2; i++) {
  84                         ret = regmap_bulk_read(dev->regmap[2], 0x8e + i,
  85                                                &buf[i], 1);
  86                         if (ret)
  87                                 goto err;
  88                 }
  89
  90                 utmp1 = buf[0] << 8 | buf[1] << 0 | buf[0] >> 2;
  91                 dev_dbg(&client->dev, "strength=%u\n", utmp1);
  92
  93                 c->strength.stat[0].scale = FE_SCALE_RELATIVE;
  94                 c->strength.stat[0].uvalue = utmp1;
  95         } else {
  96                 c->strength.stat[0].scale = FE_SCALE_NOT_AVAILABLE;
  97         }
  98
  99         return 0;
 100 err:
 101         dev_dbg(&client->dev, "failed=%d\n", ret);
 102         return ret;
 103 }
 104
 105 static int mn88472_set_frontend(struct dvb_frontend *fe)
 106 {
 107         struct i2c_client *client = fe->demodulator_priv;
 108         struct mn88472_dev *dev = i2c_get_clientdata(client);
 109         struct dtv_frontend_properties *c = &fe->dtv_property_cache;
 110         int ret, i;
 111         unsigned int utmp;
 112         u32 if_frequency;
 113         u8 buf[3], delivery_system_val, bandwidth_val, *bandwidth_vals_ptr;
 114         u8 reg_bank0_b4_val, reg_bank0_cd_val, reg_bank0_d4_val;
 115         u8 reg_bank0_d6_val;
 116
 117         dev_dbg(&client->dev,
 118                 "delivery_system=%u modulation=%u frequency=%u bandwidth_hz=%u symbol_rate=%u inversion=%d stream_id=%d\n",
 119                 c->delivery_system, c->modulation, c->frequency,
 120                 c->bandwidth_hz, c->symbol_rate, c->inversion, c->stream_id);
 121
 122         if (!dev->active) {
 123                 ret = -EAGAIN;
 124                 goto err;
 125         }
 126
 127         switch (c->delivery_system) {
 128         case SYS_DVBT:
 129                 delivery_system_val = 0x02;
 130                 reg_bank0_b4_val = 0x00;
 131                 reg_bank0_cd_val = 0x1f;
 132                 reg_bank0_d4_val = 0x0a;
 133                 reg_bank0_d6_val = 0x48;
 134                 break;
 135         case SYS_DVBT2:
 136                 delivery_system_val = 0x03;
 137                 reg_bank0_b4_val = 0xf6;
 138                 reg_bank0_cd_val = 0x01;
 139                 reg_bank0_d4_val = 0x09;
 140                 reg_bank0_d6_val = 0x46;
 141                 break;
 142         case SYS_DVBC_ANNEX_A:
 143                 delivery_system_val = 0x04;
 144                 reg_bank0_b4_val = 0x00;
 145                 reg_bank0_cd_val = 0x17;
 146                 reg_bank0_d4_val = 0x09;
 147                 reg_bank0_d6_val = 0x48;
 148                 break;
 149         default:
 150                 ret = -EINVAL;
 151                 goto err;
 152         }
 153
 154         switch (c->delivery_system) {
 155         case SYS_DVBT:
 156         case SYS_DVBT2:
 157                 switch (c->bandwidth_hz) {
 158                 case 5000000:
 159                         bandwidth_vals_ptr = "\xe5\x99\x9a\x1b\xa9\x1b\xa9";
 160                         bandwidth_val = 0x03;
 161                         break;
 162                 case 6000000:
 163                         bandwidth_vals_ptr = "\xbf\x55\x55\x15\x6b\x15\x6b";
 164                         bandwidth_val = 0x02;
 165                         break;
 166                 case 7000000:
 167                         bandwidth_vals_ptr = "\xa4\x00\x00\x0f\x2c\x0f\x2c";
 168                         bandwidth_val = 0x01;
 169                         break;
 170                 case 8000000:
 171                         bandwidth_vals_ptr = "\x8f\x80\x00\x08\xee\x08\xee";
 172                         bandwidth_val = 0x00;
 173                         break;
 174                 default:
 175                         ret = -EINVAL;
 176                         goto err;
 177                 }
 178                 break;
 179         case SYS_DVBC_ANNEX_A:
 180                 bandwidth_vals_ptr = NULL;
 181                 bandwidth_val = 0x00;
 182                 break;
 183         default:
 184                 break;
 185         }
 186
 187         /* Program tuner */
 188         if (fe->ops.tuner_ops.set_params) {
 189                 ret = fe->ops.tuner_ops.set_params(fe);
 190                 if (ret)
 191                         goto err;
 192         }
 193
 194         if (fe->ops.tuner_ops.get_if_frequency) {
 195                 ret = fe->ops.tuner_ops.get_if_frequency(fe, &if_frequency);
 196                 if (ret)
 197                         goto err;
 198
 199                 dev_dbg(&client->dev, "get_if_frequency=%d\n", if_frequency);
 200         } else {
 201                 ret = -EINVAL;
 202                 goto err;
 203         }
 204
 205         ret = regmap_write(dev->regmap[2], 0x00, 0x66);
 206         if (ret)
 207                 goto err;
 208         ret = regmap_write(dev->regmap[2], 0x01, 0x00);
 209         if (ret)
 210                 goto err;
 211         ret = regmap_write(dev->regmap[2], 0x02, 0x01);
 212         if (ret)
 213                 goto err;
 214         ret = regmap_write(dev->regmap[2], 0x03, delivery_system_val);
 215         if (ret)
 216                 goto err;
 217         ret = regmap_write(dev->regmap[2], 0x04, bandwidth_val);
 218         if (ret)
 219                 goto err;
 220
 221         /* IF */
 222         utmp = DIV_ROUND_CLOSEST_ULL((u64)if_frequency * 0x1000000, dev->clk);
 223         buf[0] = (utmp >> 16) & 0xff;
 224         buf[1] = (utmp >>  8) & 0xff;
 225         buf[2] = (utmp >>  0) & 0xff;
 226         for (i = 0; i < 3; i++) {
 227                 ret = regmap_write(dev->regmap[2], 0x10 + i, buf[i]);
 228                 if (ret)
 229                         goto err;
 230         }
 231
 232         /* Bandwidth */
 233         if (bandwidth_vals_ptr) {
 234                 for (i = 0; i < 7; i++) {
 235                         ret = regmap_write(dev->regmap[2], 0x13 + i,
 236                                            bandwidth_vals_ptr[i]);
 237                         if (ret)
 238                                 goto err;
 239                 }
 240         }
 241
 242         ret = regmap_write(dev->regmap[0], 0xb4, reg_bank0_b4_val);
 243         if (ret)
 244                 goto err;
 245         ret = regmap_write(dev->regmap[0], 0xcd, reg_bank0_cd_val);
 246         if (ret)
 247                 goto err;
 248         ret = regmap_write(dev->regmap[0], 0xd4, reg_bank0_d4_val);
 249         if (ret)
 250                 goto err;
 251         ret = regmap_write(dev->regmap[0], 0xd6, reg_bank0_d6_val);
 252         if (ret)
 253                 goto err;
 254
 255         switch (c->delivery_system) {
 256         case SYS_DVBT:
 257                 ret = regmap_write(dev->regmap[0], 0x07, 0x26);
 258                 if (ret)
 259                         goto err;
 260                 ret = regmap_write(dev->regmap[0], 0x00, 0xba);
 261                 if (ret)
 262                         goto err;
 263                 ret = regmap_write(dev->regmap[0], 0x01, 0x13);
 264                 if (ret)
 265                         goto err;
 266                 break;
 267         case SYS_DVBT2:
 268                 ret = regmap_write(dev->regmap[2], 0x2b, 0x13);
 269                 if (ret)
 270                         goto err;
 271                 ret = regmap_write(dev->regmap[2], 0x4f, 0x05);
 272                 if (ret)
 273                         goto err;
 274                 ret = regmap_write(dev->regmap[1], 0xf6, 0x05);
 275                 if (ret)
 276                         goto err;
 277                 ret = regmap_write(dev->regmap[2], 0x32, c->stream_id);
 278                 if (ret)
 279                         goto err;
 280                 break;
 281         case SYS_DVBC_ANNEX_A:
 282                 break;
 283         default:
 284                 break;
 285         }
 286
 287         /* Reset FSM */
 288         ret = regmap_write(dev->regmap[2], 0xf8, 0x9f);
 289         if (ret)
 290                 goto err;
 291
 292         return 0;
 293 err:
 294         dev_dbg(&client->dev, "failed=%d\n", ret);
 295         return ret;
 296 }
 297
 298 static int mn88472_init(struct dvb_frontend *fe)
 299 {
 300         struct i2c_client *client = fe->demodulator_priv;
 301         struct mn88472_dev *dev = i2c_get_clientdata(client);
 302         int ret, len, rem;
 303         unsigned int utmp;
 304         const struct firmware *firmware;
 305         const char *name = MN88472_FIRMWARE;
 306
 307         dev_dbg(&client->dev, "\n");
 308
 309         /* Power up */
 310         ret = regmap_write(dev->regmap[2], 0x05, 0x00);
 311         if (ret)
 312                 goto err;
 313         ret = regmap_write(dev->regmap[2], 0x0b, 0x00);
 314         if (ret)
 315                 goto err;
 316         ret = regmap_write(dev->regmap[2], 0x0c, 0x00);
 317         if (ret)
 318                 goto err;
 319
 320         /* Check if firmware is already running */
 321         ret = regmap_read(dev->regmap[0], 0xf5, &utmp);
 322         if (ret)
 323                 goto err;
 324         if (!(utmp & 0x01))
 325                 goto warm;
 326
 327         ret = request_firmware(&firmware, name, &client->dev);
 328         if (ret) {
 329                 dev_err(&client->dev, "firmware file '%s' not found\n", name);
 330                 goto err;
 331         }
 332
 333         dev_info(&client->dev, "downloading firmware from file '%s'\n", name);
 334
 335         ret = regmap_write(dev->regmap[0], 0xf5, 0x03);
 336         if (ret)
 337                 goto err_release_firmware;
 338
 339         for (rem = firmware->size; rem > 0; rem -= (dev->i2c_write_max - 1)) {
 340                 len = min(dev->i2c_write_max - 1, rem);
 341                 ret = regmap_bulk_write(dev->regmap[0], 0xf6,
 342                                         &firmware->data[firmware->size - rem],
 343                                         len);
 344                 if (ret) {
 345                         dev_err(&client->dev, "firmware download failed %d\n",
 346                                 ret);
 347                         goto err_release_firmware;
 348                 }
 349         }
 350
 351         /* Parity check of firmware */
 352         ret = regmap_read(dev->regmap[0], 0xf8, &utmp);
 353         if (ret)
 354                 goto err_release_firmware;
 355         if (utmp & 0x10) {
 356                 ret = -EINVAL;
 357                 dev_err(&client->dev, "firmware did not run\n");
 358                 goto err_release_firmware;
 359         }
 360
 361         ret = regmap_write(dev->regmap[0], 0xf5, 0x00);
 362         if (ret)
 363                 goto err_release_firmware;
 364
 365         release_firmware(firmware);
 366 warm:
 367         /* TS config */
 368         switch (dev->ts_mode) {
 369         case SERIAL_TS_MODE:
 370                 utmp = 0x1d;
 371                 break;
 372         case PARALLEL_TS_MODE:
 373                 utmp = 0x00;
 374                 break;
 375         default:
 376                 ret = -EINVAL;
 377                 goto err;
 378         }
 379         ret = regmap_write(dev->regmap[2], 0x08, utmp);
 380         if (ret)
 381                 goto err;
 382
 383         switch (dev->ts_clk) {
 384         case VARIABLE_TS_CLOCK:
 385                 utmp = 0xe3;
 386                 break;
 387         case FIXED_TS_CLOCK:
 388                 utmp = 0xe1;
 389                 break;
 390         default:
 391                 ret = -EINVAL;
 392                 goto err;
 393         }
 394         ret = regmap_write(dev->regmap[0], 0xd9, utmp);
 395         if (ret)
 396                 goto err;
 397
 398         dev->active = true;
 399
 400         return 0;
 401 err_release_firmware:
 402         release_firmware(firmware);
 403 err:
 404         dev_dbg(&client->dev, "failed=%d\n", ret);
 405         return ret;
 406 }
 407
 408 static int mn88472_sleep(struct dvb_frontend *fe)
 409 {
 410         struct i2c_client *client = fe->demodulator_priv;
 411         struct mn88472_dev *dev = i2c_get_clientdata(client);
 412         int ret;
 413
 414         dev_dbg(&client->dev, "\n");
 415
 416         /* Power down */
 417         ret = regmap_write(dev->regmap[2], 0x0c, 0x30);
 418         if (ret)
 419                 goto err;
 420         ret = regmap_write(dev->regmap[2], 0x0b, 0x30);
 421         if (ret)
 422                 goto err;
 423         ret = regmap_write(dev->regmap[2], 0x05, 0x3e);
 424         if (ret)
 425                 goto err;
 426
 427         return 0;
 428 err:
 429         dev_dbg(&client->dev, "failed=%d\n", ret);
 430         return ret;
 431 }
 432
 433 static const struct dvb_frontend_ops mn88472_ops = {
 434         .delsys = {SYS_DVBT, SYS_DVBT2, SYS_DVBC_ANNEX_A},
 435         .info = {
 436                 .name = "Panasonic MN88472",
 437                 .symbol_rate_min = 1000000,
 438                 .symbol_rate_max = 7200000,
 439                 .caps = FE_CAN_FEC_1_2                 |
 440                         FE_CAN_FEC_2_3                 |
 441                         FE_CAN_FEC_3_4                 |
 442                         FE_CAN_FEC_5_6                 |
 443                         FE_CAN_FEC_7_8                 |
 444                         FE_CAN_FEC_AUTO                |
 445                         FE_CAN_QPSK                    |
 446                         FE_CAN_QAM_16                  |
 447                         FE_CAN_QAM_32                  |
 448                         FE_CAN_QAM_64                  |
 449                         FE_CAN_QAM_128                 |
 450                         FE_CAN_QAM_256                 |
 451                         FE_CAN_QAM_AUTO                |
 452                         FE_CAN_TRANSMISSION_MODE_AUTO  |
 453                         FE_CAN_GUARD_INTERVAL_AUTO     |
 454                         FE_CAN_HIERARCHY_AUTO          |
 455                         FE_CAN_MUTE_TS                 |
 456                         FE_CAN_2G_MODULATION           |
 457                         FE_CAN_MULTISTREAM
 458         },
 459
 460         .get_tune_settings = mn88472_get_tune_settings,
 461
 462         .init = mn88472_init,
 463         .sleep = mn88472_sleep,
 464
 465         .set_frontend = mn88472_set_frontend,
 466
 467         .read_status = mn88472_read_status,
 468 };
 469
 470 static struct dvb_frontend *mn88472_get_dvb_frontend(struct i2c_client *client)
 471 {
 472         struct mn88472_dev *dev = i2c_get_clientdata(client);
 473
 474         dev_dbg(&client->dev, "\n");
 475
 476         return &dev->fe;
 477 }
 478
 479 static int mn88472_probe(struct i2c_client *client,
 480                          const struct i2c_device_id *id)
 481 {
 482         struct mn88472_config *pdata = client->dev.platform_data;
 483         struct mn88472_dev *dev;
 484         struct dtv_frontend_properties *c;
 485         int ret;
 486         unsigned int utmp;
 487         static const struct regmap_config regmap_config = {
 488                 .reg_bits = 8,
 489                 .val_bits = 8,
 490         };
 491
 492         dev_dbg(&client->dev, "\n");
 493
 494         dev = kzalloc(sizeof(*dev), GFP_KERNEL);
 495         if (!dev) {
 496                 ret = -ENOMEM;
 497                 goto err;
 498         }
 499
 500         dev->i2c_write_max = pdata->i2c_wr_max ? pdata->i2c_wr_max : ~0;
 501         dev->clk = pdata->xtal;
 502         dev->ts_mode = pdata->ts_mode;
 503         dev->ts_clk = pdata->ts_clock;
 504         dev->client[0] = client;
 505         dev->regmap[0] = regmap_init_i2c(dev->client[0], &regmap_config);
 506         if (IS_ERR(dev->regmap[0])) {
 507                 ret = PTR_ERR(dev->regmap[0]);
 508                 goto err_kfree;
 509         }
 510
 511         /*
 512          * Chip has three I2C addresses for different register banks. Used
 513          * addresses are 0x18, 0x1a and 0x1c. We register two dummy clients,
 514          * 0x1a and 0x1c, in order to get own I2C client for each register bank.
 515          *
 516          * Also, register bank 2 do not support sequential I/O. Only single
 517          * register write or read is allowed to that bank.
 518          */
 519         dev->client[1] = i2c_new_dummy(client->adapter, 0x1a);
 520         if (!dev->client[1]) {
 521                 ret = -ENODEV;
 522                 dev_err(&client->dev, "I2C registration failed\n");
 523                 if (ret)
 524                         goto err_regmap_0_regmap_exit;
 525         }
 526         dev->regmap[1] = regmap_init_i2c(dev->client[1], &regmap_config);
 527         if (IS_ERR(dev->regmap[1])) {
 528                 ret = PTR_ERR(dev->regmap[1]);
 529                 goto err_client_1_i2c_unregister_device;
 530         }
 531         i2c_set_clientdata(dev->client[1], dev);
 532
 533         dev->client[2] = i2c_new_dummy(client->adapter, 0x1c);
 534         if (!dev->client[2]) {
 535                 ret = -ENODEV;
 536                 dev_err(&client->dev, "2nd I2C registration failed\n");
 537                 if (ret)
 538                         goto err_regmap_1_regmap_exit;
 539         }
 540         dev->regmap[2] = regmap_init_i2c(dev->client[2], &regmap_config);
 541         if (IS_ERR(dev->regmap[2])) {
 542                 ret = PTR_ERR(dev->regmap[2]);
 543                 goto err_client_2_i2c_unregister_device;
 544         }
 545         i2c_set_clientdata(dev->client[2], dev);
 546
 547         /* Check demod answers with correct chip id */
 548         ret = regmap_read(dev->regmap[2], 0xff, &utmp);
 549         if (ret)
 550                 goto err_regmap_2_regmap_exit;
 551
 552         dev_dbg(&client->dev, "chip id=%02x\n", utmp);
 553
 554         if (utmp != 0x02) {
 555                 ret = -ENODEV;
 556                 goto err_regmap_2_regmap_exit;
 557         }
 558
 559         /* Sleep because chip is active by default */
 560         ret = regmap_write(dev->regmap[2], 0x05, 0x3e);
 561         if (ret)
 562                 goto err_regmap_2_regmap_exit;
 563
 564         /* Create dvb frontend */
 565         memcpy(&dev->fe.ops, &mn88472_ops, sizeof(struct dvb_frontend_ops));
 566         dev->fe.demodulator_priv = client;
 567         *pdata->fe = &dev->fe;
 568         i2c_set_clientdata(client, dev);
 569
 570         /* Init stats to indicate which stats are supported */
 571         c = &dev->fe.dtv_property_cache;
 572         c->strength.len = 1;
 573
 574         /* Setup callbacks */
 575         pdata->get_dvb_frontend = mn88472_get_dvb_frontend;
 576
 577         dev_info(&client->dev, "Panasonic MN88472 successfully identified\n");
 578
 579         return 0;
 580 err_regmap_2_regmap_exit:
 581         regmap_exit(dev->regmap[2]);
 582 err_client_2_i2c_unregister_device:
 583         i2c_unregister_device(dev->client[2]);
 584 err_regmap_1_regmap_exit:
 585         regmap_exit(dev->regmap[1]);
 586 err_client_1_i2c_unregister_device:
 587         i2c_unregister_device(dev->client[1]);
 588 err_regmap_0_regmap_exit:
 589         regmap_exit(dev->regmap[0]);
 590 err_kfree:
 591         kfree(dev);
 592 err:
 593         dev_dbg(&client->dev, "failed=%d\n", ret);
 594         return ret;
 595 }
 596
 597 static int mn88472_remove(struct i2c_client *client)
 598 {
 599         struct mn88472_dev *dev = i2c_get_clientdata(client);
 600
 601         dev_dbg(&client->dev, "\n");
 602
 603         regmap_exit(dev->regmap[2]);
 604         i2c_unregister_device(dev->client[2]);
 605
 606         regmap_exit(dev->regmap[1]);
 607         i2c_unregister_device(dev->client[1]);
 608
 609         regmap_exit(dev->regmap[0]);
 610
 611         kfree(dev);
 612
 613         return 0;
 614 }
 615
 616 static const struct i2c_device_id mn88472_id_table[] = {
 617         {"mn88472", 0},
 618         {}
 619 };
 620 MODULE_DEVICE_TABLE(i2c, mn88472_id_table);
 621
 622 static struct i2c_driver mn88472_driver = {
 623         .driver = {
 624                 .name = "mn88472",
 625                 .suppress_bind_attrs = true,
 626         },
 627         .probe    = mn88472_probe,
 628         .remove   = mn88472_remove,
 629         .id_table = mn88472_id_table,
 630 };
 631
 632 module_i2c_driver(mn88472_driver);
 633
 634 MODULE_AUTHOR("Antti Palosaari <crope@iki.fi>");
 635 MODULE_DESCRIPTION("Panasonic MN88472 DVB-T/T2/C demodulator driver");
 636 MODULE_LICENSE("GPL");
 637 MODULE_FIRMWARE(MN88472_FIRMWARE);