drivers/media/dvb-frontends/si2168.c

   1 /*
   2  * Silicon Labs Si2168 DVB-T/T2/C demodulator driver
   3  *
   4  * Copyright (C) 2014 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 "si2168_priv.h"
  18
  19 static const struct dvb_frontend_ops si2168_ops;
  20
  21 /* execute firmware command */
  22 static int si2168_cmd_execute(struct i2c_client *client, struct si2168_cmd *cmd)
  23 {
  24         struct si2168_dev *dev = i2c_get_clientdata(client);
  25         int ret;
  26         unsigned long timeout;
  27
  28         mutex_lock(&dev->i2c_mutex);
  29
  30         if (cmd->wlen) {
  31                 /* write cmd and args for firmware */
  32                 ret = i2c_master_send(client, cmd->args, cmd->wlen);
  33                 if (ret < 0) {
  34                         goto err_mutex_unlock;
  35                 } else if (ret != cmd->wlen) {
  36                         ret = -EREMOTEIO;
  37                         goto err_mutex_unlock;
  38                 }
  39         }
  40
  41         if (cmd->rlen) {
  42                 /* wait cmd execution terminate */
  43                 #define TIMEOUT 70
  44                 timeout = jiffies + msecs_to_jiffies(TIMEOUT);
  45                 while (!time_after(jiffies, timeout)) {
  46                         ret = i2c_master_recv(client, cmd->args, cmd->rlen);
  47                         if (ret < 0) {
  48                                 goto err_mutex_unlock;
  49                         } else if (ret != cmd->rlen) {
  50                                 ret = -EREMOTEIO;
  51                                 goto err_mutex_unlock;
  52                         }
  53
  54                         /* firmware ready? */
  55                         if ((cmd->args[0] >> 7) & 0x01)
  56                                 break;
  57                 }
  58
  59                 dev_dbg(&client->dev, "cmd execution took %d ms\n",
  60                                 jiffies_to_msecs(jiffies) -
  61                                 (jiffies_to_msecs(timeout) - TIMEOUT));
  62
  63                 /* error bit set? */
  64                 if ((cmd->args[0] >> 6) & 0x01) {
  65                         ret = -EREMOTEIO;
  66                         goto err_mutex_unlock;
  67                 }
  68
  69                 if (!((cmd->args[0] >> 7) & 0x01)) {
  70                         ret = -ETIMEDOUT;
  71                         goto err_mutex_unlock;
  72                 }
  73         }
  74
  75         mutex_unlock(&dev->i2c_mutex);
  76         return 0;
  77 err_mutex_unlock:
  78         mutex_unlock(&dev->i2c_mutex);
  79         dev_dbg(&client->dev, "failed=%d\n", ret);
  80         return ret;
  81 }
  82
  83 static int si2168_read_status(struct dvb_frontend *fe, enum fe_status *status)
  84 {
  85         struct i2c_client *client = fe->demodulator_priv;
  86         struct si2168_dev *dev = i2c_get_clientdata(client);
  87         struct dtv_frontend_properties *c = &fe->dtv_property_cache;
  88         int ret;
  89         struct si2168_cmd cmd;
  90
  91         *status = 0;
  92
  93         if (!dev->active) {
  94                 ret = -EAGAIN;
  95                 goto err;
  96         }
  97
  98         switch (c->delivery_system) {
  99         case SYS_DVBT:
 100                 memcpy(cmd.args, "\xa0\x01", 2);
 101                 cmd.wlen = 2;
 102                 cmd.rlen = 13;
 103                 break;
 104         case SYS_DVBC_ANNEX_A:
 105                 memcpy(cmd.args, "\x90\x01", 2);
 106                 cmd.wlen = 2;
 107                 cmd.rlen = 9;
 108                 break;
 109         case SYS_DVBT2:
 110                 memcpy(cmd.args, "\x50\x01", 2);
 111                 cmd.wlen = 2;
 112                 cmd.rlen = 14;
 113                 break;
 114         default:
 115                 ret = -EINVAL;
 116                 goto err;
 117         }
 118
 119         ret = si2168_cmd_execute(client, &cmd);
 120         if (ret)
 121                 goto err;
 122
 123         switch ((cmd.args[2] >> 1) & 0x03) {
 124         case 0x01:
 125                 *status = FE_HAS_SIGNAL | FE_HAS_CARRIER;
 126                 break;
 127         case 0x03:
 128                 *status = FE_HAS_SIGNAL | FE_HAS_CARRIER | FE_HAS_VITERBI |
 129                                 FE_HAS_SYNC | FE_HAS_LOCK;
 130                 break;
 131         }
 132
 133         dev->fe_status = *status;
 134
 135         if (*status & FE_HAS_LOCK) {
 136                 c->cnr.len = 1;
 137                 c->cnr.stat[0].scale = FE_SCALE_DECIBEL;
 138                 c->cnr.stat[0].svalue = cmd.args[3] * 1000 / 4;
 139         } else {
 140                 c->cnr.len = 1;
 141                 c->cnr.stat[0].scale = FE_SCALE_NOT_AVAILABLE;
 142         }
 143
 144         dev_dbg(&client->dev, "status=%02x args=%*ph\n",
 145                         *status, cmd.rlen, cmd.args);
 146
 147         return 0;
 148 err:
 149         dev_dbg(&client->dev, "failed=%d\n", ret);
 150         return ret;
 151 }
 152
 153 static int si2168_set_frontend(struct dvb_frontend *fe)
 154 {
 155         struct i2c_client *client = fe->demodulator_priv;
 156         struct si2168_dev *dev = i2c_get_clientdata(client);
 157         struct dtv_frontend_properties *c = &fe->dtv_property_cache;
 158         int ret;
 159         struct si2168_cmd cmd;
 160         u8 bandwidth, delivery_system;
 161
 162         dev_dbg(&client->dev,
 163                         "delivery_system=%u modulation=%u frequency=%u bandwidth_hz=%u symbol_rate=%u inversion=%u stream_id=%u\n",
 164                         c->delivery_system, c->modulation, c->frequency,
 165                         c->bandwidth_hz, c->symbol_rate, c->inversion,
 166                         c->stream_id);
 167
 168         if (!dev->active) {
 169                 ret = -EAGAIN;
 170                 goto err;
 171         }
 172
 173         switch (c->delivery_system) {
 174         case SYS_DVBT:
 175                 delivery_system = 0x20;
 176                 break;
 177         case SYS_DVBC_ANNEX_A:
 178                 delivery_system = 0x30;
 179                 break;
 180         case SYS_DVBT2:
 181                 delivery_system = 0x70;
 182                 break;
 183         default:
 184                 ret = -EINVAL;
 185                 goto err;
 186         }
 187
 188         if (c->bandwidth_hz == 0) {
 189                 ret = -EINVAL;
 190                 goto err;
 191         } else if (c->bandwidth_hz <= 2000000)
 192                 bandwidth = 0x02;
 193         else if (c->bandwidth_hz <= 5000000)
 194                 bandwidth = 0x05;
 195         else if (c->bandwidth_hz <= 6000000)
 196                 bandwidth = 0x06;
 197         else if (c->bandwidth_hz <= 7000000)
 198                 bandwidth = 0x07;
 199         else if (c->bandwidth_hz <= 8000000)
 200                 bandwidth = 0x08;
 201         else if (c->bandwidth_hz <= 9000000)
 202                 bandwidth = 0x09;
 203         else if (c->bandwidth_hz <= 10000000)
 204                 bandwidth = 0x0a;
 205         else
 206                 bandwidth = 0x0f;
 207
 208         /* program tuner */
 209         if (fe->ops.tuner_ops.set_params) {
 210                 ret = fe->ops.tuner_ops.set_params(fe);
 211                 if (ret)
 212                         goto err;
 213         }
 214
 215         memcpy(cmd.args, "\x88\x02\x02\x02\x02", 5);
 216         cmd.wlen = 5;
 217         cmd.rlen = 5;
 218         ret = si2168_cmd_execute(client, &cmd);
 219         if (ret)
 220                 goto err;
 221
 222         /* that has no big effect */
 223         if (c->delivery_system == SYS_DVBT)
 224                 memcpy(cmd.args, "\x89\x21\x06\x11\xff\x98", 6);
 225         else if (c->delivery_system == SYS_DVBC_ANNEX_A)
 226                 memcpy(cmd.args, "\x89\x21\x06\x11\x89\xf0", 6);
 227         else if (c->delivery_system == SYS_DVBT2)
 228                 memcpy(cmd.args, "\x89\x21\x06\x11\x89\x20", 6);
 229         cmd.wlen = 6;
 230         cmd.rlen = 3;
 231         ret = si2168_cmd_execute(client, &cmd);
 232         if (ret)
 233                 goto err;
 234
 235         if (c->delivery_system == SYS_DVBT2) {
 236                 /* select PLP */
 237                 cmd.args[0] = 0x52;
 238                 cmd.args[1] = c->stream_id & 0xff;
 239                 cmd.args[2] = c->stream_id == NO_STREAM_ID_FILTER ? 0 : 1;
 240                 cmd.wlen = 3;
 241                 cmd.rlen = 1;
 242                 ret = si2168_cmd_execute(client, &cmd);
 243                 if (ret)
 244                         goto err;
 245         }
 246
 247         memcpy(cmd.args, "\x51\x03", 2);
 248         cmd.wlen = 2;
 249         cmd.rlen = 12;
 250         ret = si2168_cmd_execute(client, &cmd);
 251         if (ret)
 252                 goto err;
 253
 254         memcpy(cmd.args, "\x12\x08\x04", 3);
 255         cmd.wlen = 3;
 256         cmd.rlen = 3;
 257         ret = si2168_cmd_execute(client, &cmd);
 258         if (ret)
 259                 goto err;
 260
 261         memcpy(cmd.args, "\x14\x00\x0c\x10\x12\x00", 6);
 262         cmd.wlen = 6;
 263         cmd.rlen = 4;
 264         ret = si2168_cmd_execute(client, &cmd);
 265         if (ret)
 266                 goto err;
 267
 268         memcpy(cmd.args, "\x14\x00\x06\x10\x24\x00", 6);
 269         cmd.wlen = 6;
 270         cmd.rlen = 4;
 271         ret = si2168_cmd_execute(client, &cmd);
 272         if (ret)
 273                 goto err;
 274
 275         memcpy(cmd.args, "\x14\x00\x07\x10\x00\x24", 6);
 276         cmd.wlen = 6;
 277         cmd.rlen = 4;
 278         ret = si2168_cmd_execute(client, &cmd);
 279         if (ret)
 280                 goto err;
 281
 282         memcpy(cmd.args, "\x14\x00\x0a\x10\x00\x00", 6);
 283         cmd.args[4] = delivery_system | bandwidth;
 284         cmd.wlen = 6;
 285         cmd.rlen = 4;
 286         ret = si2168_cmd_execute(client, &cmd);
 287         if (ret)
 288                 goto err;
 289
 290         /* set DVB-C symbol rate */
 291         if (c->delivery_system == SYS_DVBC_ANNEX_A) {
 292                 memcpy(cmd.args, "\x14\x00\x02\x11", 4);
 293                 cmd.args[4] = ((c->symbol_rate / 1000) >> 0) & 0xff;
 294                 cmd.args[5] = ((c->symbol_rate / 1000) >> 8) & 0xff;
 295                 cmd.wlen = 6;
 296                 cmd.rlen = 4;
 297                 ret = si2168_cmd_execute(client, &cmd);
 298                 if (ret)
 299                         goto err;
 300         }
 301
 302         memcpy(cmd.args, "\x14\x00\x0f\x10\x10\x00", 6);
 303         cmd.wlen = 6;
 304         cmd.rlen = 4;
 305         ret = si2168_cmd_execute(client, &cmd);
 306         if (ret)
 307                 goto err;
 308
 309         memcpy(cmd.args, "\x14\x00\x09\x10\xe3\x08", 6);
 310         cmd.args[5] |= dev->ts_clock_inv ? 0x00 : 0x10;
 311         cmd.wlen = 6;
 312         cmd.rlen = 4;
 313         ret = si2168_cmd_execute(client, &cmd);
 314         if (ret)
 315                 goto err;
 316
 317         memcpy(cmd.args, "\x14\x00\x08\x10\xd7\x05", 6);
 318         cmd.args[5] |= dev->ts_clock_inv ? 0x00 : 0x10;
 319         cmd.wlen = 6;
 320         cmd.rlen = 4;
 321         ret = si2168_cmd_execute(client, &cmd);
 322         if (ret)
 323                 goto err;
 324
 325         memcpy(cmd.args, "\x14\x00\x01\x12\x00\x00", 6);
 326         cmd.wlen = 6;
 327         cmd.rlen = 4;
 328         ret = si2168_cmd_execute(client, &cmd);
 329         if (ret)
 330                 goto err;
 331
 332         memcpy(cmd.args, "\x14\x00\x01\x03\x0c\x00", 6);
 333         cmd.wlen = 6;
 334         cmd.rlen = 4;
 335         ret = si2168_cmd_execute(client, &cmd);
 336         if (ret)
 337                 goto err;
 338
 339         memcpy(cmd.args, "\x85", 1);
 340         cmd.wlen = 1;
 341         cmd.rlen = 1;
 342         ret = si2168_cmd_execute(client, &cmd);
 343         if (ret)
 344                 goto err;
 345
 346         dev->delivery_system = c->delivery_system;
 347
 348         return 0;
 349 err:
 350         dev_dbg(&client->dev, "failed=%d\n", ret);
 351         return ret;
 352 }
 353
 354 static int si2168_init(struct dvb_frontend *fe)
 355 {
 356         struct i2c_client *client = fe->demodulator_priv;
 357         struct si2168_dev *dev = i2c_get_clientdata(client);
 358         int ret, len, remaining;
 359         const struct firmware *fw;
 360         struct si2168_cmd cmd;
 361
 362         dev_dbg(&client->dev, "\n");
 363
 364         /* initialize */
 365         memcpy(cmd.args, "\xc0\x12\x00\x0c\x00\x0d\x16\x00\x00\x00\x00\x00\x00", 13);
 366         cmd.wlen = 13;
 367         cmd.rlen = 0;
 368         ret = si2168_cmd_execute(client, &cmd);
 369         if (ret)
 370                 goto err;
 371
 372         if (dev->warm) {
 373                 /* resume */
 374                 memcpy(cmd.args, "\xc0\x06\x08\x0f\x00\x20\x21\x01", 8);
 375                 cmd.wlen = 8;
 376                 cmd.rlen = 1;
 377                 ret = si2168_cmd_execute(client, &cmd);
 378                 if (ret)
 379                         goto err;
 380
 381                 memcpy(cmd.args, "\x85", 1);
 382                 cmd.wlen = 1;
 383                 cmd.rlen = 1;
 384                 ret = si2168_cmd_execute(client, &cmd);
 385                 if (ret)
 386                         goto err;
 387
 388                 goto warm;
 389         }
 390
 391         /* power up */
 392         memcpy(cmd.args, "\xc0\x06\x01\x0f\x00\x20\x20\x01", 8);
 393         cmd.wlen = 8;
 394         cmd.rlen = 1;
 395         ret = si2168_cmd_execute(client, &cmd);
 396         if (ret)
 397                 goto err;
 398
 399         /* request the firmware, this will block and timeout */
 400         ret = request_firmware(&fw, dev->firmware_name, &client->dev);
 401         if (ret) {
 402                 /* fallback mechanism to handle old name for Si2168 B40 fw */
 403                 if (dev->chip_id == SI2168_CHIP_ID_B40) {
 404                         dev->firmware_name = SI2168_B40_FIRMWARE_FALLBACK;
 405                         ret = request_firmware(&fw, dev->firmware_name,
 406                                                &client->dev);
 407                 }
 408
 409                 if (ret == 0) {
 410                         dev_notice(&client->dev,
 411                                         "please install firmware file '%s'\n",
 412                                         SI2168_B40_FIRMWARE);
 413                 } else {
 414                         dev_err(&client->dev,
 415                                         "firmware file '%s' not found\n",
 416                                         dev->firmware_name);
 417                         goto err_release_firmware;
 418                 }
 419         }
 420
 421         dev_info(&client->dev, "downloading firmware from file '%s'\n",
 422                         dev->firmware_name);
 423
 424         if ((fw->size % 17 == 0) && (fw->data[0] > 5)) {
 425                 /* firmware is in the new format */
 426                 for (remaining = fw->size; remaining > 0; remaining -= 17) {
 427                         len = fw->data[fw->size - remaining];
 428                         if (len > SI2168_ARGLEN) {
 429                                 ret = -EINVAL;
 430                                 break;
 431                         }
 432                         memcpy(cmd.args, &fw->data[(fw->size - remaining) + 1], len);
 433                         cmd.wlen = len;
 434                         cmd.rlen = 1;
 435                         ret = si2168_cmd_execute(client, &cmd);
 436                         if (ret)
 437                                 break;
 438                 }
 439         } else if (fw->size % 8 == 0) {
 440                 /* firmware is in the old format */
 441                 for (remaining = fw->size; remaining > 0; remaining -= 8) {
 442                         len = 8;
 443                         memcpy(cmd.args, &fw->data[fw->size - remaining], len);
 444                         cmd.wlen = len;
 445                         cmd.rlen = 1;
 446                         ret = si2168_cmd_execute(client, &cmd);
 447                         if (ret)
 448                                 break;
 449                 }
 450         } else {
 451                 /* bad or unknown firmware format */
 452                 ret = -EINVAL;
 453         }
 454
 455         if (ret) {
 456                 dev_err(&client->dev, "firmware download failed %d\n", ret);
 457                 goto err_release_firmware;
 458         }
 459
 460         release_firmware(fw);
 461
 462         memcpy(cmd.args, "\x01\x01", 2);
 463         cmd.wlen = 2;
 464         cmd.rlen = 1;
 465         ret = si2168_cmd_execute(client, &cmd);
 466         if (ret)
 467                 goto err;
 468
 469         /* query firmware version */
 470         memcpy(cmd.args, "\x11", 1);
 471         cmd.wlen = 1;
 472         cmd.rlen = 10;
 473         ret = si2168_cmd_execute(client, &cmd);
 474         if (ret)
 475                 goto err;
 476
 477         dev->version = (cmd.args[9] + '@') << 24 | (cmd.args[6] - '0') << 16 |
 478                        (cmd.args[7] - '0') << 8 | (cmd.args[8]) << 0;
 479         dev_info(&client->dev, "firmware version: %c %d.%d.%d\n",
 480                  dev->version >> 24 & 0xff, dev->version >> 16 & 0xff,
 481                  dev->version >> 8 & 0xff, dev->version >> 0 & 0xff);
 482
 483         /* set ts mode */
 484         memcpy(cmd.args, "\x14\x00\x01\x10\x10\x00", 6);
 485         cmd.args[4] |= dev->ts_mode;
 486         if (dev->ts_clock_gapped)
 487                 cmd.args[4] |= 0x40;
 488         cmd.wlen = 6;
 489         cmd.rlen = 4;
 490         ret = si2168_cmd_execute(client, &cmd);
 491         if (ret)
 492                 goto err;
 493
 494         dev->warm = true;
 495 warm:
 496         dev->active = true;
 497
 498         return 0;
 499
 500 err_release_firmware:
 501         release_firmware(fw);
 502 err:
 503         dev_dbg(&client->dev, "failed=%d\n", ret);
 504         return ret;
 505 }
 506
 507 static int si2168_sleep(struct dvb_frontend *fe)
 508 {
 509         struct i2c_client *client = fe->demodulator_priv;
 510         struct si2168_dev *dev = i2c_get_clientdata(client);
 511         int ret;
 512         struct si2168_cmd cmd;
 513
 514         dev_dbg(&client->dev, "\n");
 515
 516         dev->active = false;
 517
 518         /* Firmware B 4.0-11 or later loses warm state during sleep */
 519         if (dev->version > ('B' << 24 | 4 << 16 | 0 << 8 | 11 << 0))
 520                 dev->warm = false;
 521
 522         memcpy(cmd.args, "\x13", 1);
 523         cmd.wlen = 1;
 524         cmd.rlen = 0;
 525         ret = si2168_cmd_execute(client, &cmd);
 526         if (ret)
 527                 goto err;
 528
 529         return 0;
 530 err:
 531         dev_dbg(&client->dev, "failed=%d\n", ret);
 532         return ret;
 533 }
 534
 535 static int si2168_get_tune_settings(struct dvb_frontend *fe,
 536         struct dvb_frontend_tune_settings *s)
 537 {
 538         s->min_delay_ms = 900;
 539
 540         return 0;
 541 }
 542
 543 static int si2168_select(struct i2c_mux_core *muxc, u32 chan)
 544 {
 545         struct i2c_client *client = i2c_mux_priv(muxc);
 546         int ret;
 547         struct si2168_cmd cmd;
 548
 549         /* open I2C gate */
 550         memcpy(cmd.args, "\xc0\x0d\x01", 3);
 551         cmd.wlen = 3;
 552         cmd.rlen = 0;
 553         ret = si2168_cmd_execute(client, &cmd);
 554         if (ret)
 555                 goto err;
 556
 557         return 0;
 558 err:
 559         dev_dbg(&client->dev, "failed=%d\n", ret);
 560         return ret;
 561 }
 562
 563 static int si2168_deselect(struct i2c_mux_core *muxc, u32 chan)
 564 {
 565         struct i2c_client *client = i2c_mux_priv(muxc);
 566         int ret;
 567         struct si2168_cmd cmd;
 568
 569         /* close I2C gate */
 570         memcpy(cmd.args, "\xc0\x0d\x00", 3);
 571         cmd.wlen = 3;
 572         cmd.rlen = 0;
 573         ret = si2168_cmd_execute(client, &cmd);
 574         if (ret)
 575                 goto err;
 576
 577         return 0;
 578 err:
 579         dev_dbg(&client->dev, "failed=%d\n", ret);
 580         return ret;
 581 }
 582
 583 static const struct dvb_frontend_ops si2168_ops = {
 584         .delsys = {SYS_DVBT, SYS_DVBT2, SYS_DVBC_ANNEX_A},
 585         .info = {
 586                 .name = "Silicon Labs Si2168",
 587                 .symbol_rate_min = 1000000,
 588                 .symbol_rate_max = 7200000,
 589                 .caps = FE_CAN_FEC_1_2 |
 590                         FE_CAN_FEC_2_3 |
 591                         FE_CAN_FEC_3_4 |
 592                         FE_CAN_FEC_5_6 |
 593                         FE_CAN_FEC_7_8 |
 594                         FE_CAN_FEC_AUTO |
 595                         FE_CAN_QPSK |
 596                         FE_CAN_QAM_16 |
 597                         FE_CAN_QAM_32 |
 598                         FE_CAN_QAM_64 |
 599                         FE_CAN_QAM_128 |
 600                         FE_CAN_QAM_256 |
 601                         FE_CAN_QAM_AUTO |
 602                         FE_CAN_TRANSMISSION_MODE_AUTO |
 603                         FE_CAN_GUARD_INTERVAL_AUTO |
 604                         FE_CAN_HIERARCHY_AUTO |
 605                         FE_CAN_MUTE_TS |
 606                         FE_CAN_2G_MODULATION |
 607                         FE_CAN_MULTISTREAM
 608         },
 609
 610         .get_tune_settings = si2168_get_tune_settings,
 611
 612         .init = si2168_init,
 613         .sleep = si2168_sleep,
 614
 615         .set_frontend = si2168_set_frontend,
 616
 617         .read_status = si2168_read_status,
 618 };
 619
 620 static int si2168_probe(struct i2c_client *client,
 621                 const struct i2c_device_id *id)
 622 {
 623         struct si2168_config *config = client->dev.platform_data;
 624         struct si2168_dev *dev;
 625         int ret;
 626         struct si2168_cmd cmd;
 627
 628         dev_dbg(&client->dev, "\n");
 629
 630         dev = kzalloc(sizeof(*dev), GFP_KERNEL);
 631         if (!dev) {
 632                 ret = -ENOMEM;
 633                 dev_err(&client->dev, "kzalloc() failed\n");
 634                 goto err;
 635         }
 636
 637         i2c_set_clientdata(client, dev);
 638         mutex_init(&dev->i2c_mutex);
 639
 640         /* Initialize */
 641         memcpy(cmd.args, "\xc0\x12\x00\x0c\x00\x0d\x16\x00\x00\x00\x00\x00\x00", 13);
 642         cmd.wlen = 13;
 643         cmd.rlen = 0;
 644         ret = si2168_cmd_execute(client, &cmd);
 645         if (ret)
 646                 goto err_kfree;
 647
 648         /* Power up */
 649         memcpy(cmd.args, "\xc0\x06\x01\x0f\x00\x20\x20\x01", 8);
 650         cmd.wlen = 8;
 651         cmd.rlen = 1;
 652         ret = si2168_cmd_execute(client, &cmd);
 653         if (ret)
 654                 goto err_kfree;
 655
 656         /* Query chip revision */
 657         memcpy(cmd.args, "\x02", 1);
 658         cmd.wlen = 1;
 659         cmd.rlen = 13;
 660         ret = si2168_cmd_execute(client, &cmd);
 661         if (ret)
 662                 goto err_kfree;
 663
 664         dev->chip_id = cmd.args[1] << 24 | cmd.args[2] << 16 |
 665                        cmd.args[3] << 8 | cmd.args[4] << 0;
 666
 667         switch (dev->chip_id) {
 668         case SI2168_CHIP_ID_A20:
 669                 dev->firmware_name = SI2168_A20_FIRMWARE;
 670                 break;
 671         case SI2168_CHIP_ID_A30:
 672                 dev->firmware_name = SI2168_A30_FIRMWARE;
 673                 break;
 674         case SI2168_CHIP_ID_B40:
 675                 dev->firmware_name = SI2168_B40_FIRMWARE;
 676                 break;
 677         default:
 678                 dev_dbg(&client->dev, "unknown chip version Si21%d-%c%c%c\n",
 679                         cmd.args[2], cmd.args[1], cmd.args[3], cmd.args[4]);
 680                 ret = -ENODEV;
 681                 goto err_kfree;
 682         }
 683
 684         dev->version = (cmd.args[1]) << 24 | (cmd.args[3] - '0') << 16 |
 685                        (cmd.args[4] - '0') << 8 | (cmd.args[5]) << 0;
 686
 687         /* create mux i2c adapter for tuner */
 688         dev->muxc = i2c_mux_alloc(client->adapter, &client->dev,
 689                                   1, 0, I2C_MUX_LOCKED,
 690                                   si2168_select, si2168_deselect);
 691         if (!dev->muxc) {
 692                 ret = -ENOMEM;
 693                 goto err_kfree;
 694         }
 695         dev->muxc->priv = client;
 696         ret = i2c_mux_add_adapter(dev->muxc, 0, 0, 0);
 697         if (ret)
 698                 goto err_kfree;
 699
 700         /* create dvb_frontend */
 701         memcpy(&dev->fe.ops, &si2168_ops, sizeof(struct dvb_frontend_ops));
 702         dev->fe.demodulator_priv = client;
 703         *config->i2c_adapter = dev->muxc->adapter[0];
 704         *config->fe = &dev->fe;
 705         dev->ts_mode = config->ts_mode;
 706         dev->ts_clock_inv = config->ts_clock_inv;
 707         dev->ts_clock_gapped = config->ts_clock_gapped;
 708
 709         dev_info(&client->dev, "Silicon Labs Si2168-%c%d%d successfully identified\n",
 710                  dev->version >> 24 & 0xff, dev->version >> 16 & 0xff,
 711                  dev->version >> 8 & 0xff);
 712         dev_info(&client->dev, "firmware version: %c %d.%d.%d\n",
 713                  dev->version >> 24 & 0xff, dev->version >> 16 & 0xff,
 714                  dev->version >> 8 & 0xff, dev->version >> 0 & 0xff);
 715
 716         return 0;
 717 err_kfree:
 718         kfree(dev);
 719 err:
 720         dev_dbg(&client->dev, "failed=%d\n", ret);
 721         return ret;
 722 }
 723
 724 static int si2168_remove(struct i2c_client *client)
 725 {
 726         struct si2168_dev *dev = i2c_get_clientdata(client);
 727
 728         dev_dbg(&client->dev, "\n");
 729
 730         i2c_mux_del_adapters(dev->muxc);
 731
 732         dev->fe.ops.release = NULL;
 733         dev->fe.demodulator_priv = NULL;
 734
 735         kfree(dev);
 736
 737         return 0;
 738 }
 739
 740 static const struct i2c_device_id si2168_id_table[] = {
 741         {"si2168", 0},
 742         {}
 743 };
 744 MODULE_DEVICE_TABLE(i2c, si2168_id_table);
 745
 746 static struct i2c_driver si2168_driver = {
 747         .driver = {
 748                 .name                = "si2168",
 749                 .suppress_bind_attrs = true,
 750         },
 751         .probe          = si2168_probe,
 752         .remove         = si2168_remove,
 753         .id_table       = si2168_id_table,
 754 };
 755
 756 module_i2c_driver(si2168_driver);
 757
 758 MODULE_AUTHOR("Antti Palosaari <crope@iki.fi>");
 759 MODULE_DESCRIPTION("Silicon Labs Si2168 DVB-T/T2/C demodulator driver");
 760 MODULE_LICENSE("GPL");
 761 MODULE_FIRMWARE(SI2168_A20_FIRMWARE);
 762 MODULE_FIRMWARE(SI2168_A30_FIRMWARE);
 763 MODULE_FIRMWARE(SI2168_B40_FIRMWARE);