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, i;
  89         unsigned int utmp, utmp1, utmp2;
  90         struct si2168_cmd cmd;
  91
  92         *status = 0;
  93
  94         if (!dev->active) {
  95                 ret = -EAGAIN;
  96                 goto err;
  97         }
  98
  99         switch (c->delivery_system) {
 100         case SYS_DVBT:
 101                 memcpy(cmd.args, "\xa0\x01", 2);
 102                 cmd.wlen = 2;
 103                 cmd.rlen = 13;
 104                 break;
 105         case SYS_DVBC_ANNEX_A:
 106                 memcpy(cmd.args, "\x90\x01", 2);
 107                 cmd.wlen = 2;
 108                 cmd.rlen = 9;
 109                 break;
 110         case SYS_DVBT2:
 111                 memcpy(cmd.args, "\x50\x01", 2);
 112                 cmd.wlen = 2;
 113                 cmd.rlen = 14;
 114                 break;
 115         default:
 116                 ret = -EINVAL;
 117                 goto err;
 118         }
 119
 120         ret = si2168_cmd_execute(client, &cmd);
 121         if (ret)
 122                 goto err;
 123
 124         switch ((cmd.args[2] >> 1) & 0x03) {
 125         case 0x01:
 126                 *status = FE_HAS_SIGNAL | FE_HAS_CARRIER;
 127                 break;
 128         case 0x03:
 129                 *status = FE_HAS_SIGNAL | FE_HAS_CARRIER | FE_HAS_VITERBI |
 130                                 FE_HAS_SYNC | FE_HAS_LOCK;
 131                 break;
 132         }
 133
 134         dev->fe_status = *status;
 135
 136         if (*status & FE_HAS_LOCK) {
 137                 c->cnr.len = 1;
 138                 c->cnr.stat[0].scale = FE_SCALE_DECIBEL;
 139                 c->cnr.stat[0].svalue = cmd.args[3] * 1000 / 4;
 140         } else {
 141                 c->cnr.len = 1;
 142                 c->cnr.stat[0].scale = FE_SCALE_NOT_AVAILABLE;
 143         }
 144
 145         dev_dbg(&client->dev, "status=%02x args=%*ph\n",
 146                         *status, cmd.rlen, cmd.args);
 147
 148         /* BER */
 149         if (*status & FE_HAS_VITERBI) {
 150                 memcpy(cmd.args, "\x82\x00", 2);
 151                 cmd.wlen = 2;
 152                 cmd.rlen = 3;
 153                 ret = si2168_cmd_execute(client, &cmd);
 154                 if (ret)
 155                         goto err;
 156
 157                 /*
 158                  * Firmware returns [0, 255] mantissa and [0, 8] exponent.
 159                  * Convert to DVB API: mantissa * 10^(8 - exponent) / 10^8
 160                  */
 161                 utmp = clamp(8 - cmd.args[1], 0, 8);
 162                 for (i = 0, utmp1 = 1; i < utmp; i++)
 163                         utmp1 = utmp1 * 10;
 164
 165                 utmp1 = cmd.args[2] * utmp1;
 166                 utmp2 = 100000000; /* 10^8 */
 167
 168                 dev_dbg(&client->dev,
 169                         "post_bit_error=%u post_bit_count=%u ber=%u*10^-%u\n",
 170                         utmp1, utmp2, cmd.args[2], cmd.args[1]);
 171
 172                 c->post_bit_error.stat[0].scale = FE_SCALE_COUNTER;
 173                 c->post_bit_error.stat[0].uvalue += utmp1;
 174                 c->post_bit_count.stat[0].scale = FE_SCALE_COUNTER;
 175                 c->post_bit_count.stat[0].uvalue += utmp2;
 176         } else {
 177                 c->post_bit_error.stat[0].scale = FE_SCALE_NOT_AVAILABLE;
 178                 c->post_bit_count.stat[0].scale = FE_SCALE_NOT_AVAILABLE;
 179         }
 180
 181         /* UCB */
 182         if (*status & FE_HAS_SYNC) {
 183                 memcpy(cmd.args, "\x84\x01", 2);
 184                 cmd.wlen = 2;
 185                 cmd.rlen = 3;
 186                 ret = si2168_cmd_execute(client, &cmd);
 187                 if (ret)
 188                         goto err;
 189
 190                 utmp1 = cmd.args[2] << 8 | cmd.args[1] << 0;
 191                 dev_dbg(&client->dev, "block_error=%u\n", utmp1);
 192
 193                 /* Sometimes firmware returns bogus value */
 194                 if (utmp1 == 0xffff)
 195                         utmp1 = 0;
 196
 197                 c->block_error.stat[0].scale = FE_SCALE_COUNTER;
 198                 c->block_error.stat[0].uvalue += utmp1;
 199         } else {
 200                 c->block_error.stat[0].scale = FE_SCALE_NOT_AVAILABLE;
 201         }
 202
 203         return 0;
 204 err:
 205         dev_dbg(&client->dev, "failed=%d\n", ret);
 206         return ret;
 207 }
 208
 209 static int si2168_set_frontend(struct dvb_frontend *fe)
 210 {
 211         struct i2c_client *client = fe->demodulator_priv;
 212         struct si2168_dev *dev = i2c_get_clientdata(client);
 213         struct dtv_frontend_properties *c = &fe->dtv_property_cache;
 214         int ret;
 215         struct si2168_cmd cmd;
 216         u8 bandwidth, delivery_system;
 217
 218         dev_dbg(&client->dev,
 219                         "delivery_system=%u modulation=%u frequency=%u bandwidth_hz=%u symbol_rate=%u inversion=%u stream_id=%u\n",
 220                         c->delivery_system, c->modulation, c->frequency,
 221                         c->bandwidth_hz, c->symbol_rate, c->inversion,
 222                         c->stream_id);
 223
 224         if (!dev->active) {
 225                 ret = -EAGAIN;
 226                 goto err;
 227         }
 228
 229         switch (c->delivery_system) {
 230         case SYS_DVBT:
 231                 delivery_system = 0x20;
 232                 break;
 233         case SYS_DVBC_ANNEX_A:
 234                 delivery_system = 0x30;
 235                 break;
 236         case SYS_DVBT2:
 237                 delivery_system = 0x70;
 238                 break;
 239         default:
 240                 ret = -EINVAL;
 241                 goto err;
 242         }
 243
 244         if (c->bandwidth_hz == 0) {
 245                 ret = -EINVAL;
 246                 goto err;
 247         } else if (c->bandwidth_hz <= 2000000)
 248                 bandwidth = 0x02;
 249         else if (c->bandwidth_hz <= 5000000)
 250                 bandwidth = 0x05;
 251         else if (c->bandwidth_hz <= 6000000)
 252                 bandwidth = 0x06;
 253         else if (c->bandwidth_hz <= 7000000)
 254                 bandwidth = 0x07;
 255         else if (c->bandwidth_hz <= 8000000)
 256                 bandwidth = 0x08;
 257         else if (c->bandwidth_hz <= 9000000)
 258                 bandwidth = 0x09;
 259         else if (c->bandwidth_hz <= 10000000)
 260                 bandwidth = 0x0a;
 261         else
 262                 bandwidth = 0x0f;
 263
 264         /* program tuner */
 265         if (fe->ops.tuner_ops.set_params) {
 266                 ret = fe->ops.tuner_ops.set_params(fe);
 267                 if (ret)
 268                         goto err;
 269         }
 270
 271         memcpy(cmd.args, "\x88\x02\x02\x02\x02", 5);
 272         cmd.wlen = 5;
 273         cmd.rlen = 5;
 274         ret = si2168_cmd_execute(client, &cmd);
 275         if (ret)
 276                 goto err;
 277
 278         /* that has no big effect */
 279         if (c->delivery_system == SYS_DVBT)
 280                 memcpy(cmd.args, "\x89\x21\x06\x11\xff\x98", 6);
 281         else if (c->delivery_system == SYS_DVBC_ANNEX_A)
 282                 memcpy(cmd.args, "\x89\x21\x06\x11\x89\xf0", 6);
 283         else if (c->delivery_system == SYS_DVBT2)
 284                 memcpy(cmd.args, "\x89\x21\x06\x11\x89\x20", 6);
 285         cmd.wlen = 6;
 286         cmd.rlen = 3;
 287         ret = si2168_cmd_execute(client, &cmd);
 288         if (ret)
 289                 goto err;
 290
 291         if (c->delivery_system == SYS_DVBT2) {
 292                 /* select PLP */
 293                 cmd.args[0] = 0x52;
 294                 cmd.args[1] = c->stream_id & 0xff;
 295                 cmd.args[2] = c->stream_id == NO_STREAM_ID_FILTER ? 0 : 1;
 296                 cmd.wlen = 3;
 297                 cmd.rlen = 1;
 298                 ret = si2168_cmd_execute(client, &cmd);
 299                 if (ret)
 300                         goto err;
 301         }
 302
 303         memcpy(cmd.args, "\x51\x03", 2);
 304         cmd.wlen = 2;
 305         cmd.rlen = 12;
 306         ret = si2168_cmd_execute(client, &cmd);
 307         if (ret)
 308                 goto err;
 309
 310         memcpy(cmd.args, "\x12\x08\x04", 3);
 311         cmd.wlen = 3;
 312         cmd.rlen = 3;
 313         ret = si2168_cmd_execute(client, &cmd);
 314         if (ret)
 315                 goto err;
 316
 317         memcpy(cmd.args, "\x14\x00\x0c\x10\x12\x00", 6);
 318         cmd.wlen = 6;
 319         cmd.rlen = 4;
 320         ret = si2168_cmd_execute(client, &cmd);
 321         if (ret)
 322                 goto err;
 323
 324         memcpy(cmd.args, "\x14\x00\x06\x10\x24\x00", 6);
 325         cmd.wlen = 6;
 326         cmd.rlen = 4;
 327         ret = si2168_cmd_execute(client, &cmd);
 328         if (ret)
 329                 goto err;
 330
 331         memcpy(cmd.args, "\x14\x00\x07\x10\x00\x24", 6);
 332         cmd.wlen = 6;
 333         cmd.rlen = 4;
 334         ret = si2168_cmd_execute(client, &cmd);
 335         if (ret)
 336                 goto err;
 337
 338         memcpy(cmd.args, "\x14\x00\x0a\x10\x00\x00", 6);
 339         cmd.args[4] = delivery_system | bandwidth;
 340         cmd.wlen = 6;
 341         cmd.rlen = 4;
 342         ret = si2168_cmd_execute(client, &cmd);
 343         if (ret)
 344                 goto err;
 345
 346         /* set DVB-C symbol rate */
 347         if (c->delivery_system == SYS_DVBC_ANNEX_A) {
 348                 memcpy(cmd.args, "\x14\x00\x02\x11", 4);
 349                 cmd.args[4] = ((c->symbol_rate / 1000) >> 0) & 0xff;
 350                 cmd.args[5] = ((c->symbol_rate / 1000) >> 8) & 0xff;
 351                 cmd.wlen = 6;
 352                 cmd.rlen = 4;
 353                 ret = si2168_cmd_execute(client, &cmd);
 354                 if (ret)
 355                         goto err;
 356         }
 357
 358         memcpy(cmd.args, "\x14\x00\x0f\x10\x10\x00", 6);
 359         cmd.wlen = 6;
 360         cmd.rlen = 4;
 361         ret = si2168_cmd_execute(client, &cmd);
 362         if (ret)
 363                 goto err;
 364
 365         memcpy(cmd.args, "\x14\x00\x09\x10\xe3\x08", 6);
 366         cmd.args[5] |= dev->ts_clock_inv ? 0x00 : 0x10;
 367         cmd.wlen = 6;
 368         cmd.rlen = 4;
 369         ret = si2168_cmd_execute(client, &cmd);
 370         if (ret)
 371                 goto err;
 372
 373         memcpy(cmd.args, "\x14\x00\x08\x10\xd7\x05", 6);
 374         cmd.args[5] |= dev->ts_clock_inv ? 0x00 : 0x10;
 375         cmd.wlen = 6;
 376         cmd.rlen = 4;
 377         ret = si2168_cmd_execute(client, &cmd);
 378         if (ret)
 379                 goto err;
 380
 381         memcpy(cmd.args, "\x14\x00\x01\x12\x00\x00", 6);
 382         cmd.wlen = 6;
 383         cmd.rlen = 4;
 384         ret = si2168_cmd_execute(client, &cmd);
 385         if (ret)
 386                 goto err;
 387
 388         memcpy(cmd.args, "\x14\x00\x01\x03\x0c\x00", 6);
 389         cmd.wlen = 6;
 390         cmd.rlen = 4;
 391         ret = si2168_cmd_execute(client, &cmd);
 392         if (ret)
 393                 goto err;
 394
 395         memcpy(cmd.args, "\x85", 1);
 396         cmd.wlen = 1;
 397         cmd.rlen = 1;
 398         ret = si2168_cmd_execute(client, &cmd);
 399         if (ret)
 400                 goto err;
 401
 402         dev->delivery_system = c->delivery_system;
 403
 404         return 0;
 405 err:
 406         dev_dbg(&client->dev, "failed=%d\n", ret);
 407         return ret;
 408 }
 409
 410 static int si2168_init(struct dvb_frontend *fe)
 411 {
 412         struct i2c_client *client = fe->demodulator_priv;
 413         struct si2168_dev *dev = i2c_get_clientdata(client);
 414         struct dtv_frontend_properties *c = &fe->dtv_property_cache;
 415         int ret, len, remaining;
 416         const struct firmware *fw;
 417         struct si2168_cmd cmd;
 418
 419         dev_dbg(&client->dev, "\n");
 420
 421         /* initialize */
 422         memcpy(cmd.args, "\xc0\x12\x00\x0c\x00\x0d\x16\x00\x00\x00\x00\x00\x00", 13);
 423         cmd.wlen = 13;
 424         cmd.rlen = 0;
 425         ret = si2168_cmd_execute(client, &cmd);
 426         if (ret)
 427                 goto err;
 428
 429         if (dev->warm) {
 430                 /* resume */
 431                 memcpy(cmd.args, "\xc0\x06\x08\x0f\x00\x20\x21\x01", 8);
 432                 cmd.wlen = 8;
 433                 cmd.rlen = 1;
 434                 ret = si2168_cmd_execute(client, &cmd);
 435                 if (ret)
 436                         goto err;
 437
 438                 memcpy(cmd.args, "\x85", 1);
 439                 cmd.wlen = 1;
 440                 cmd.rlen = 1;
 441                 ret = si2168_cmd_execute(client, &cmd);
 442                 if (ret)
 443                         goto err;
 444
 445                 goto warm;
 446         }
 447
 448         /* power up */
 449         memcpy(cmd.args, "\xc0\x06\x01\x0f\x00\x20\x20\x01", 8);
 450         cmd.wlen = 8;
 451         cmd.rlen = 1;
 452         ret = si2168_cmd_execute(client, &cmd);
 453         if (ret)
 454                 goto err;
 455
 456         /* request the firmware, this will block and timeout */
 457         ret = request_firmware(&fw, dev->firmware_name, &client->dev);
 458         if (ret) {
 459                 /* fallback mechanism to handle old name for Si2168 B40 fw */
 460                 if (dev->chip_id == SI2168_CHIP_ID_B40) {
 461                         dev->firmware_name = SI2168_B40_FIRMWARE_FALLBACK;
 462                         ret = request_firmware(&fw, dev->firmware_name,
 463                                                &client->dev);
 464                 }
 465
 466                 if (ret == 0) {
 467                         dev_notice(&client->dev,
 468                                         "please install firmware file '%s'\n",
 469                                         SI2168_B40_FIRMWARE);
 470                 } else {
 471                         dev_err(&client->dev,
 472                                         "firmware file '%s' not found\n",
 473                                         dev->firmware_name);
 474                         goto err_release_firmware;
 475                 }
 476         }
 477
 478         dev_info(&client->dev, "downloading firmware from file '%s'\n",
 479                         dev->firmware_name);
 480
 481         if ((fw->size % 17 == 0) && (fw->data[0] > 5)) {
 482                 /* firmware is in the new format */
 483                 for (remaining = fw->size; remaining > 0; remaining -= 17) {
 484                         len = fw->data[fw->size - remaining];
 485                         if (len > SI2168_ARGLEN) {
 486                                 ret = -EINVAL;
 487                                 break;
 488                         }
 489                         memcpy(cmd.args, &fw->data[(fw->size - remaining) + 1], len);
 490                         cmd.wlen = len;
 491                         cmd.rlen = 1;
 492                         ret = si2168_cmd_execute(client, &cmd);
 493                         if (ret)
 494                                 break;
 495                 }
 496         } else if (fw->size % 8 == 0) {
 497                 /* firmware is in the old format */
 498                 for (remaining = fw->size; remaining > 0; remaining -= 8) {
 499                         len = 8;
 500                         memcpy(cmd.args, &fw->data[fw->size - remaining], len);
 501                         cmd.wlen = len;
 502                         cmd.rlen = 1;
 503                         ret = si2168_cmd_execute(client, &cmd);
 504                         if (ret)
 505                                 break;
 506                 }
 507         } else {
 508                 /* bad or unknown firmware format */
 509                 ret = -EINVAL;
 510         }
 511
 512         if (ret) {
 513                 dev_err(&client->dev, "firmware download failed %d\n", ret);
 514                 goto err_release_firmware;
 515         }
 516
 517         release_firmware(fw);
 518
 519         memcpy(cmd.args, "\x01\x01", 2);
 520         cmd.wlen = 2;
 521         cmd.rlen = 1;
 522         ret = si2168_cmd_execute(client, &cmd);
 523         if (ret)
 524                 goto err;
 525
 526         /* query firmware version */
 527         memcpy(cmd.args, "\x11", 1);
 528         cmd.wlen = 1;
 529         cmd.rlen = 10;
 530         ret = si2168_cmd_execute(client, &cmd);
 531         if (ret)
 532                 goto err;
 533
 534         dev->version = (cmd.args[9] + '@') << 24 | (cmd.args[6] - '0') << 16 |
 535                        (cmd.args[7] - '0') << 8 | (cmd.args[8]) << 0;
 536         dev_info(&client->dev, "firmware version: %c %d.%d.%d\n",
 537                  dev->version >> 24 & 0xff, dev->version >> 16 & 0xff,
 538                  dev->version >> 8 & 0xff, dev->version >> 0 & 0xff);
 539
 540         /* set ts mode */
 541         memcpy(cmd.args, "\x14\x00\x01\x10\x10\x00", 6);
 542         cmd.args[4] |= dev->ts_mode;
 543         if (dev->ts_clock_gapped)
 544                 cmd.args[4] |= 0x40;
 545         cmd.wlen = 6;
 546         cmd.rlen = 4;
 547         ret = si2168_cmd_execute(client, &cmd);
 548         if (ret)
 549                 goto err;
 550
 551         dev->warm = true;
 552 warm:
 553         /* Init stats here to indicate which stats are supported */
 554         c->cnr.len = 1;
 555         c->cnr.stat[0].scale = FE_SCALE_NOT_AVAILABLE;
 556         c->post_bit_error.len = 1;
 557         c->post_bit_error.stat[0].scale = FE_SCALE_NOT_AVAILABLE;
 558         c->post_bit_count.len = 1;
 559         c->post_bit_count.stat[0].scale = FE_SCALE_NOT_AVAILABLE;
 560         c->block_error.len = 1;
 561         c->block_error.stat[0].scale = FE_SCALE_NOT_AVAILABLE;
 562
 563         dev->active = true;
 564
 565         return 0;
 566 err_release_firmware:
 567         release_firmware(fw);
 568 err:
 569         dev_dbg(&client->dev, "failed=%d\n", ret);
 570         return ret;
 571 }
 572
 573 static int si2168_sleep(struct dvb_frontend *fe)
 574 {
 575         struct i2c_client *client = fe->demodulator_priv;
 576         struct si2168_dev *dev = i2c_get_clientdata(client);
 577         int ret;
 578         struct si2168_cmd cmd;
 579
 580         dev_dbg(&client->dev, "\n");
 581
 582         dev->active = false;
 583
 584         /* Firmware B 4.0-11 or later loses warm state during sleep */
 585         if (dev->version > ('B' << 24 | 4 << 16 | 0 << 8 | 11 << 0))
 586                 dev->warm = false;
 587
 588         memcpy(cmd.args, "\x13", 1);
 589         cmd.wlen = 1;
 590         cmd.rlen = 0;
 591         ret = si2168_cmd_execute(client, &cmd);
 592         if (ret)
 593                 goto err;
 594
 595         return 0;
 596 err:
 597         dev_dbg(&client->dev, "failed=%d\n", ret);
 598         return ret;
 599 }
 600
 601 static int si2168_get_tune_settings(struct dvb_frontend *fe,
 602         struct dvb_frontend_tune_settings *s)
 603 {
 604         s->min_delay_ms = 900;
 605
 606         return 0;
 607 }
 608
 609 static int si2168_select(struct i2c_mux_core *muxc, u32 chan)
 610 {
 611         struct i2c_client *client = i2c_mux_priv(muxc);
 612         int ret;
 613         struct si2168_cmd cmd;
 614
 615         /* open I2C gate */
 616         memcpy(cmd.args, "\xc0\x0d\x01", 3);
 617         cmd.wlen = 3;
 618         cmd.rlen = 0;
 619         ret = si2168_cmd_execute(client, &cmd);
 620         if (ret)
 621                 goto err;
 622
 623         return 0;
 624 err:
 625         dev_dbg(&client->dev, "failed=%d\n", ret);
 626         return ret;
 627 }
 628
 629 static int si2168_deselect(struct i2c_mux_core *muxc, u32 chan)
 630 {
 631         struct i2c_client *client = i2c_mux_priv(muxc);
 632         int ret;
 633         struct si2168_cmd cmd;
 634
 635         /* close I2C gate */
 636         memcpy(cmd.args, "\xc0\x0d\x00", 3);
 637         cmd.wlen = 3;
 638         cmd.rlen = 0;
 639         ret = si2168_cmd_execute(client, &cmd);
 640         if (ret)
 641                 goto err;
 642
 643         return 0;
 644 err:
 645         dev_dbg(&client->dev, "failed=%d\n", ret);
 646         return ret;
 647 }
 648
 649 static const struct dvb_frontend_ops si2168_ops = {
 650         .delsys = {SYS_DVBT, SYS_DVBT2, SYS_DVBC_ANNEX_A},
 651         .info = {
 652                 .name = "Silicon Labs Si2168",
 653                 .symbol_rate_min = 1000000,
 654                 .symbol_rate_max = 7200000,
 655                 .caps = FE_CAN_FEC_1_2 |
 656                         FE_CAN_FEC_2_3 |
 657                         FE_CAN_FEC_3_4 |
 658                         FE_CAN_FEC_5_6 |
 659                         FE_CAN_FEC_7_8 |
 660                         FE_CAN_FEC_AUTO |
 661                         FE_CAN_QPSK |
 662                         FE_CAN_QAM_16 |
 663                         FE_CAN_QAM_32 |
 664                         FE_CAN_QAM_64 |
 665                         FE_CAN_QAM_128 |
 666                         FE_CAN_QAM_256 |
 667                         FE_CAN_QAM_AUTO |
 668                         FE_CAN_TRANSMISSION_MODE_AUTO |
 669                         FE_CAN_GUARD_INTERVAL_AUTO |
 670                         FE_CAN_HIERARCHY_AUTO |
 671                         FE_CAN_MUTE_TS |
 672                         FE_CAN_2G_MODULATION |
 673                         FE_CAN_MULTISTREAM
 674         },
 675
 676         .get_tune_settings = si2168_get_tune_settings,
 677
 678         .init = si2168_init,
 679         .sleep = si2168_sleep,
 680
 681         .set_frontend = si2168_set_frontend,
 682
 683         .read_status = si2168_read_status,
 684 };
 685
 686 static int si2168_probe(struct i2c_client *client,
 687                 const struct i2c_device_id *id)
 688 {
 689         struct si2168_config *config = client->dev.platform_data;
 690         struct si2168_dev *dev;
 691         int ret;
 692         struct si2168_cmd cmd;
 693
 694         dev_dbg(&client->dev, "\n");
 695
 696         dev = kzalloc(sizeof(*dev), GFP_KERNEL);
 697         if (!dev) {
 698                 ret = -ENOMEM;
 699                 dev_err(&client->dev, "kzalloc() failed\n");
 700                 goto err;
 701         }
 702
 703         i2c_set_clientdata(client, dev);
 704         mutex_init(&dev->i2c_mutex);
 705
 706         /* Initialize */
 707         memcpy(cmd.args, "\xc0\x12\x00\x0c\x00\x0d\x16\x00\x00\x00\x00\x00\x00", 13);
 708         cmd.wlen = 13;
 709         cmd.rlen = 0;
 710         ret = si2168_cmd_execute(client, &cmd);
 711         if (ret)
 712                 goto err_kfree;
 713
 714         /* Power up */
 715         memcpy(cmd.args, "\xc0\x06\x01\x0f\x00\x20\x20\x01", 8);
 716         cmd.wlen = 8;
 717         cmd.rlen = 1;
 718         ret = si2168_cmd_execute(client, &cmd);
 719         if (ret)
 720                 goto err_kfree;
 721
 722         /* Query chip revision */
 723         memcpy(cmd.args, "\x02", 1);
 724         cmd.wlen = 1;
 725         cmd.rlen = 13;
 726         ret = si2168_cmd_execute(client, &cmd);
 727         if (ret)
 728                 goto err_kfree;
 729
 730         dev->chip_id = cmd.args[1] << 24 | cmd.args[2] << 16 |
 731                        cmd.args[3] << 8 | cmd.args[4] << 0;
 732
 733         switch (dev->chip_id) {
 734         case SI2168_CHIP_ID_A20:
 735                 dev->firmware_name = SI2168_A20_FIRMWARE;
 736                 break;
 737         case SI2168_CHIP_ID_A30:
 738                 dev->firmware_name = SI2168_A30_FIRMWARE;
 739                 break;
 740         case SI2168_CHIP_ID_B40:
 741                 dev->firmware_name = SI2168_B40_FIRMWARE;
 742                 break;
 743         default:
 744                 dev_dbg(&client->dev, "unknown chip version Si21%d-%c%c%c\n",
 745                         cmd.args[2], cmd.args[1], cmd.args[3], cmd.args[4]);
 746                 ret = -ENODEV;
 747                 goto err_kfree;
 748         }
 749
 750         dev->version = (cmd.args[1]) << 24 | (cmd.args[3] - '0') << 16 |
 751                        (cmd.args[4] - '0') << 8 | (cmd.args[5]) << 0;
 752
 753         /* create mux i2c adapter for tuner */
 754         dev->muxc = i2c_mux_alloc(client->adapter, &client->dev,
 755                                   1, 0, I2C_MUX_LOCKED,
 756                                   si2168_select, si2168_deselect);
 757         if (!dev->muxc) {
 758                 ret = -ENOMEM;
 759                 goto err_kfree;
 760         }
 761         dev->muxc->priv = client;
 762         ret = i2c_mux_add_adapter(dev->muxc, 0, 0, 0);
 763         if (ret)
 764                 goto err_kfree;
 765
 766         /* create dvb_frontend */
 767         memcpy(&dev->fe.ops, &si2168_ops, sizeof(struct dvb_frontend_ops));
 768         dev->fe.demodulator_priv = client;
 769         *config->i2c_adapter = dev->muxc->adapter[0];
 770         *config->fe = &dev->fe;
 771         dev->ts_mode = config->ts_mode;
 772         dev->ts_clock_inv = config->ts_clock_inv;
 773         dev->ts_clock_gapped = config->ts_clock_gapped;
 774
 775         dev_info(&client->dev, "Silicon Labs Si2168-%c%d%d successfully identified\n",
 776                  dev->version >> 24 & 0xff, dev->version >> 16 & 0xff,
 777                  dev->version >> 8 & 0xff);
 778         dev_info(&client->dev, "firmware version: %c %d.%d.%d\n",
 779                  dev->version >> 24 & 0xff, dev->version >> 16 & 0xff,
 780                  dev->version >> 8 & 0xff, dev->version >> 0 & 0xff);
 781
 782         return 0;
 783 err_kfree:
 784         kfree(dev);
 785 err:
 786         dev_dbg(&client->dev, "failed=%d\n", ret);
 787         return ret;
 788 }
 789
 790 static int si2168_remove(struct i2c_client *client)
 791 {
 792         struct si2168_dev *dev = i2c_get_clientdata(client);
 793
 794         dev_dbg(&client->dev, "\n");
 795
 796         i2c_mux_del_adapters(dev->muxc);
 797
 798         dev->fe.ops.release = NULL;
 799         dev->fe.demodulator_priv = NULL;
 800
 801         kfree(dev);
 802
 803         return 0;
 804 }
 805
 806 static const struct i2c_device_id si2168_id_table[] = {
 807         {"si2168", 0},
 808         {}
 809 };
 810 MODULE_DEVICE_TABLE(i2c, si2168_id_table);
 811
 812 static struct i2c_driver si2168_driver = {
 813         .driver = {
 814                 .name                = "si2168",
 815                 .suppress_bind_attrs = true,
 816         },
 817         .probe          = si2168_probe,
 818         .remove         = si2168_remove,
 819         .id_table       = si2168_id_table,
 820 };
 821
 822 module_i2c_driver(si2168_driver);
 823
 824 MODULE_AUTHOR("Antti Palosaari <crope@iki.fi>");
 825 MODULE_DESCRIPTION("Silicon Labs Si2168 DVB-T/T2/C demodulator driver");
 826 MODULE_LICENSE("GPL");
 827 MODULE_FIRMWARE(SI2168_A20_FIRMWARE);
 828 MODULE_FIRMWARE(SI2168_A30_FIRMWARE);
 829 MODULE_FIRMWARE(SI2168_B40_FIRMWARE);