drivers/media/dvb-frontends/si2168.c

   1 // SPDX-License-Identifier: GPL-2.0-or-later
   2 /*
   3  * Silicon Labs Si2168 DVB-T/T2/C demodulator driver
   4  *
   5  * Copyright (C) 2014 Antti Palosaari <crope@iki.fi>
   6  */
   7
   8 #include <linux/delay.h>
   9
  10 #include "si2168_priv.h"
  11
  12 static const struct dvb_frontend_ops si2168_ops;
  13
  14 /* execute firmware command */
  15 static int si2168_cmd_execute(struct i2c_client *client, struct si2168_cmd *cmd)
  16 {
  17         struct si2168_dev *dev = i2c_get_clientdata(client);
  18         int ret;
  19         unsigned long timeout;
  20
  21         mutex_lock(&dev->i2c_mutex);
  22
  23         if (cmd->wlen) {
  24                 /* write cmd and args for firmware */
  25                 ret = i2c_master_send(client, cmd->args, cmd->wlen);
  26                 if (ret < 0) {
  27                         goto err_mutex_unlock;
  28                 } else if (ret != cmd->wlen) {
  29                         ret = -EREMOTEIO;
  30                         goto err_mutex_unlock;
  31                 }
  32         }
  33
  34         if (cmd->rlen) {
  35                 /* wait cmd execution terminate */
  36                 #define TIMEOUT 70
  37                 timeout = jiffies + msecs_to_jiffies(TIMEOUT);
  38                 while (!time_after(jiffies, timeout)) {
  39                         ret = i2c_master_recv(client, cmd->args, cmd->rlen);
  40                         if (ret < 0) {
  41                                 goto err_mutex_unlock;
  42                         } else if (ret != cmd->rlen) {
  43                                 ret = -EREMOTEIO;
  44                                 goto err_mutex_unlock;
  45                         }
  46
  47                         /* firmware ready? */
  48                         if ((cmd->args[0] >> 7) & 0x01)
  49                                 break;
  50                 }
  51
  52                 dev_dbg(&client->dev, "cmd execution took %d ms\n",
  53                                 jiffies_to_msecs(jiffies) -
  54                                 (jiffies_to_msecs(timeout) - TIMEOUT));
  55
  56                 /* error bit set? */
  57                 if ((cmd->args[0] >> 6) & 0x01) {
  58                         ret = -EREMOTEIO;
  59                         goto err_mutex_unlock;
  60                 }
  61
  62                 if (!((cmd->args[0] >> 7) & 0x01)) {
  63                         ret = -ETIMEDOUT;
  64                         goto err_mutex_unlock;
  65                 }
  66         }
  67
  68         mutex_unlock(&dev->i2c_mutex);
  69         return 0;
  70 err_mutex_unlock:
  71         mutex_unlock(&dev->i2c_mutex);
  72         dev_dbg(&client->dev, "failed=%d\n", ret);
  73         return ret;
  74 }
  75
  76 static int si2168_ts_bus_ctrl(struct dvb_frontend *fe, int acquire)
  77 {
  78         struct i2c_client *client = fe->demodulator_priv;
  79         struct si2168_dev *dev = i2c_get_clientdata(client);
  80         struct si2168_cmd cmd;
  81         int ret = 0;
  82
  83         dev_dbg(&client->dev, "%s acquire: %d\n", __func__, acquire);
  84
  85         /* set TS_MODE property */
  86         memcpy(cmd.args, "\x14\x00\x01\x10\x10\x00", 6);
  87         if (acquire)
  88                 cmd.args[4] |= dev->ts_mode;
  89         else
  90                 cmd.args[4] |= SI2168_TS_TRISTATE;
  91         if (dev->ts_clock_gapped)
  92                 cmd.args[4] |= 0x40;
  93         cmd.wlen = 6;
  94         cmd.rlen = 4;
  95         ret = si2168_cmd_execute(client, &cmd);
  96
  97         return ret;
  98 }
  99
 100 static int si2168_read_status(struct dvb_frontend *fe, enum fe_status *status)
 101 {
 102         struct i2c_client *client = fe->demodulator_priv;
 103         struct si2168_dev *dev = i2c_get_clientdata(client);
 104         struct dtv_frontend_properties *c = &fe->dtv_property_cache;
 105         int ret, i;
 106         unsigned int utmp, utmp1, utmp2;
 107         struct si2168_cmd cmd;
 108
 109         *status = 0;
 110
 111         if (!dev->active) {
 112                 ret = -EAGAIN;
 113                 goto err;
 114         }
 115
 116         switch (c->delivery_system) {
 117         case SYS_DVBT:
 118                 memcpy(cmd.args, "\xa0\x01", 2);
 119                 cmd.wlen = 2;
 120                 cmd.rlen = 13;
 121                 break;
 122         case SYS_DVBC_ANNEX_A:
 123                 memcpy(cmd.args, "\x90\x01", 2);
 124                 cmd.wlen = 2;
 125                 cmd.rlen = 9;
 126                 break;
 127         case SYS_DVBT2:
 128                 memcpy(cmd.args, "\x50\x01", 2);
 129                 cmd.wlen = 2;
 130                 cmd.rlen = 14;
 131                 break;
 132         default:
 133                 ret = -EINVAL;
 134                 goto err;
 135         }
 136
 137         ret = si2168_cmd_execute(client, &cmd);
 138         if (ret)
 139                 goto err;
 140
 141         switch ((cmd.args[2] >> 1) & 0x03) {
 142         case 0x01:
 143                 *status = FE_HAS_SIGNAL | FE_HAS_CARRIER;
 144                 break;
 145         case 0x03:
 146                 *status = FE_HAS_SIGNAL | FE_HAS_CARRIER | FE_HAS_VITERBI |
 147                                 FE_HAS_SYNC | FE_HAS_LOCK;
 148                 break;
 149         }
 150
 151         dev->fe_status = *status;
 152
 153         if (*status & FE_HAS_LOCK) {
 154                 c->cnr.len = 1;
 155                 c->cnr.stat[0].scale = FE_SCALE_DECIBEL;
 156                 c->cnr.stat[0].svalue = cmd.args[3] * 1000 / 4;
 157         } else {
 158                 c->cnr.len = 1;
 159                 c->cnr.stat[0].scale = FE_SCALE_NOT_AVAILABLE;
 160         }
 161
 162         dev_dbg(&client->dev, "status=%02x args=%*ph\n",
 163                         *status, cmd.rlen, cmd.args);
 164
 165         /* BER */
 166         if (*status & FE_HAS_VITERBI) {
 167                 memcpy(cmd.args, "\x82\x00", 2);
 168                 cmd.wlen = 2;
 169                 cmd.rlen = 3;
 170                 ret = si2168_cmd_execute(client, &cmd);
 171                 if (ret)
 172                         goto err;
 173
 174                 /*
 175                  * Firmware returns [0, 255] mantissa and [0, 8] exponent.
 176                  * Convert to DVB API: mantissa * 10^(8 - exponent) / 10^8
 177                  */
 178                 utmp = clamp(8 - cmd.args[1], 0, 8);
 179                 for (i = 0, utmp1 = 1; i < utmp; i++)
 180                         utmp1 = utmp1 * 10;
 181
 182                 utmp1 = cmd.args[2] * utmp1;
 183                 utmp2 = 100000000; /* 10^8 */
 184
 185                 dev_dbg(&client->dev,
 186                         "post_bit_error=%u post_bit_count=%u ber=%u*10^-%u\n",
 187                         utmp1, utmp2, cmd.args[2], cmd.args[1]);
 188
 189                 c->post_bit_error.stat[0].scale = FE_SCALE_COUNTER;
 190                 c->post_bit_error.stat[0].uvalue += utmp1;
 191                 c->post_bit_count.stat[0].scale = FE_SCALE_COUNTER;
 192                 c->post_bit_count.stat[0].uvalue += utmp2;
 193         } else {
 194                 c->post_bit_error.stat[0].scale = FE_SCALE_NOT_AVAILABLE;
 195                 c->post_bit_count.stat[0].scale = FE_SCALE_NOT_AVAILABLE;
 196         }
 197
 198         /* UCB */
 199         if (*status & FE_HAS_SYNC) {
 200                 memcpy(cmd.args, "\x84\x01", 2);
 201                 cmd.wlen = 2;
 202                 cmd.rlen = 3;
 203                 ret = si2168_cmd_execute(client, &cmd);
 204                 if (ret)
 205                         goto err;
 206
 207                 utmp1 = cmd.args[2] << 8 | cmd.args[1] << 0;
 208                 dev_dbg(&client->dev, "block_error=%u\n", utmp1);
 209
 210                 /* Sometimes firmware returns bogus value */
 211                 if (utmp1 == 0xffff)
 212                         utmp1 = 0;
 213
 214                 c->block_error.stat[0].scale = FE_SCALE_COUNTER;
 215                 c->block_error.stat[0].uvalue += utmp1;
 216         } else {
 217                 c->block_error.stat[0].scale = FE_SCALE_NOT_AVAILABLE;
 218         }
 219
 220         return 0;
 221 err:
 222         dev_dbg(&client->dev, "failed=%d\n", ret);
 223         return ret;
 224 }
 225
 226 static int si2168_set_frontend(struct dvb_frontend *fe)
 227 {
 228         struct i2c_client *client = fe->demodulator_priv;
 229         struct si2168_dev *dev = i2c_get_clientdata(client);
 230         struct dtv_frontend_properties *c = &fe->dtv_property_cache;
 231         int ret;
 232         struct si2168_cmd cmd;
 233         u8 bandwidth, delivery_system;
 234
 235         dev_dbg(&client->dev,
 236                         "delivery_system=%u modulation=%u frequency=%u bandwidth_hz=%u symbol_rate=%u inversion=%u stream_id=%u\n",
 237                         c->delivery_system, c->modulation, c->frequency,
 238                         c->bandwidth_hz, c->symbol_rate, c->inversion,
 239                         c->stream_id);
 240
 241         if (!dev->active) {
 242                 ret = -EAGAIN;
 243                 goto err;
 244         }
 245
 246         switch (c->delivery_system) {
 247         case SYS_DVBT:
 248                 delivery_system = 0x20;
 249                 break;
 250         case SYS_DVBC_ANNEX_A:
 251                 delivery_system = 0x30;
 252                 break;
 253         case SYS_DVBT2:
 254                 delivery_system = 0x70;
 255                 break;
 256         default:
 257                 ret = -EINVAL;
 258                 goto err;
 259         }
 260
 261         if (c->bandwidth_hz == 0) {
 262                 ret = -EINVAL;
 263                 goto err;
 264         } else if (c->bandwidth_hz <= 2000000)
 265                 bandwidth = 0x02;
 266         else if (c->bandwidth_hz <= 5000000)
 267                 bandwidth = 0x05;
 268         else if (c->bandwidth_hz <= 6000000)
 269                 bandwidth = 0x06;
 270         else if (c->bandwidth_hz <= 7000000)
 271                 bandwidth = 0x07;
 272         else if (c->bandwidth_hz <= 8000000)
 273                 bandwidth = 0x08;
 274         else if (c->bandwidth_hz <= 9000000)
 275                 bandwidth = 0x09;
 276         else if (c->bandwidth_hz <= 10000000)
 277                 bandwidth = 0x0a;
 278         else
 279                 bandwidth = 0x0f;
 280
 281         /* program tuner */
 282         if (fe->ops.tuner_ops.set_params) {
 283                 ret = fe->ops.tuner_ops.set_params(fe);
 284                 if (ret)
 285                         goto err;
 286         }
 287
 288         memcpy(cmd.args, "\x88\x02\x02\x02\x02", 5);
 289         cmd.wlen = 5;
 290         cmd.rlen = 5;
 291         ret = si2168_cmd_execute(client, &cmd);
 292         if (ret)
 293                 goto err;
 294
 295         /* that has no big effect */
 296         if (c->delivery_system == SYS_DVBT)
 297                 memcpy(cmd.args, "\x89\x21\x06\x11\xff\x98", 6);
 298         else if (c->delivery_system == SYS_DVBC_ANNEX_A)
 299                 memcpy(cmd.args, "\x89\x21\x06\x11\x89\xf0", 6);
 300         else if (c->delivery_system == SYS_DVBT2)
 301                 memcpy(cmd.args, "\x89\x21\x06\x11\x89\x20", 6);
 302         cmd.wlen = 6;
 303         cmd.rlen = 3;
 304         ret = si2168_cmd_execute(client, &cmd);
 305         if (ret)
 306                 goto err;
 307
 308         if (c->delivery_system == SYS_DVBT2) {
 309                 /* select PLP */
 310                 cmd.args[0] = 0x52;
 311                 cmd.args[1] = c->stream_id & 0xff;
 312                 cmd.args[2] = c->stream_id == NO_STREAM_ID_FILTER ? 0 : 1;
 313                 cmd.wlen = 3;
 314                 cmd.rlen = 1;
 315                 ret = si2168_cmd_execute(client, &cmd);
 316                 if (ret)
 317                         goto err;
 318         }
 319
 320         memcpy(cmd.args, "\x51\x03", 2);
 321         cmd.wlen = 2;
 322         cmd.rlen = 12;
 323         ret = si2168_cmd_execute(client, &cmd);
 324         if (ret)
 325                 goto err;
 326
 327         memcpy(cmd.args, "\x12\x08\x04", 3);
 328         cmd.wlen = 3;
 329         cmd.rlen = 3;
 330         ret = si2168_cmd_execute(client, &cmd);
 331         if (ret)
 332                 goto err;
 333
 334         memcpy(cmd.args, "\x14\x00\x0c\x10\x12\x00", 6);
 335         cmd.wlen = 6;
 336         cmd.rlen = 4;
 337         ret = si2168_cmd_execute(client, &cmd);
 338         if (ret)
 339                 goto err;
 340
 341         memcpy(cmd.args, "\x14\x00\x06\x10\x24\x00", 6);
 342         cmd.wlen = 6;
 343         cmd.rlen = 4;
 344         ret = si2168_cmd_execute(client, &cmd);
 345         if (ret)
 346                 goto err;
 347
 348         memcpy(cmd.args, "\x14\x00\x07\x10\x00\x24", 6);
 349         cmd.wlen = 6;
 350         cmd.rlen = 4;
 351         ret = si2168_cmd_execute(client, &cmd);
 352         if (ret)
 353                 goto err;
 354
 355         memcpy(cmd.args, "\x14\x00\x0a\x10\x00\x00", 6);
 356         cmd.args[4] = delivery_system | bandwidth;
 357         if (dev->spectral_inversion)
 358                 cmd.args[5] |= 1;
 359         cmd.wlen = 6;
 360         cmd.rlen = 4;
 361         ret = si2168_cmd_execute(client, &cmd);
 362         if (ret)
 363                 goto err;
 364
 365         /* set DVB-C symbol rate */
 366         if (c->delivery_system == SYS_DVBC_ANNEX_A) {
 367                 memcpy(cmd.args, "\x14\x00\x02\x11", 4);
 368                 cmd.args[4] = ((c->symbol_rate / 1000) >> 0) & 0xff;
 369                 cmd.args[5] = ((c->symbol_rate / 1000) >> 8) & 0xff;
 370                 cmd.wlen = 6;
 371                 cmd.rlen = 4;
 372                 ret = si2168_cmd_execute(client, &cmd);
 373                 if (ret)
 374                         goto err;
 375         }
 376
 377         memcpy(cmd.args, "\x14\x00\x0f\x10\x10\x00", 6);
 378         cmd.wlen = 6;
 379         cmd.rlen = 4;
 380         ret = si2168_cmd_execute(client, &cmd);
 381         if (ret)
 382                 goto err;
 383
 384         memcpy(cmd.args, "\x14\x00\x09\x10\xe3\x08", 6);
 385         cmd.args[5] |= dev->ts_clock_inv ? 0x00 : 0x10;
 386         cmd.wlen = 6;
 387         cmd.rlen = 4;
 388         ret = si2168_cmd_execute(client, &cmd);
 389         if (ret)
 390                 goto err;
 391
 392         memcpy(cmd.args, "\x14\x00\x08\x10\xd7\x05", 6);
 393         cmd.args[5] |= dev->ts_clock_inv ? 0x00 : 0x10;
 394         cmd.wlen = 6;
 395         cmd.rlen = 4;
 396         ret = si2168_cmd_execute(client, &cmd);
 397         if (ret)
 398                 goto err;
 399
 400         memcpy(cmd.args, "\x14\x00\x01\x12\x00\x00", 6);
 401         cmd.wlen = 6;
 402         cmd.rlen = 4;
 403         ret = si2168_cmd_execute(client, &cmd);
 404         if (ret)
 405                 goto err;
 406
 407         memcpy(cmd.args, "\x14\x00\x01\x03\x0c\x00", 6);
 408         cmd.wlen = 6;
 409         cmd.rlen = 4;
 410         ret = si2168_cmd_execute(client, &cmd);
 411         if (ret)
 412                 goto err;
 413
 414         memcpy(cmd.args, "\x85", 1);
 415         cmd.wlen = 1;
 416         cmd.rlen = 1;
 417         ret = si2168_cmd_execute(client, &cmd);
 418         if (ret)
 419                 goto err;
 420
 421         dev->delivery_system = c->delivery_system;
 422
 423         /* enable ts bus */
 424         ret = si2168_ts_bus_ctrl(fe, 1);
 425         if (ret)
 426                 goto err;
 427
 428         return 0;
 429 err:
 430         dev_dbg(&client->dev, "failed=%d\n", ret);
 431         return ret;
 432 }
 433
 434 static int si2168_init(struct dvb_frontend *fe)
 435 {
 436         struct i2c_client *client = fe->demodulator_priv;
 437         struct si2168_dev *dev = i2c_get_clientdata(client);
 438         struct dtv_frontend_properties *c = &fe->dtv_property_cache;
 439         int ret, len, remaining;
 440         const struct firmware *fw;
 441         struct si2168_cmd cmd;
 442
 443         dev_dbg(&client->dev, "\n");
 444
 445         /* initialize */
 446         memcpy(cmd.args, "\xc0\x12\x00\x0c\x00\x0d\x16\x00\x00\x00\x00\x00\x00", 13);
 447         cmd.wlen = 13;
 448         cmd.rlen = 0;
 449         ret = si2168_cmd_execute(client, &cmd);
 450         if (ret)
 451                 goto err;
 452
 453         if (dev->warm) {
 454                 /* resume */
 455                 memcpy(cmd.args, "\xc0\x06\x08\x0f\x00\x20\x21\x01", 8);
 456                 cmd.wlen = 8;
 457                 cmd.rlen = 1;
 458                 ret = si2168_cmd_execute(client, &cmd);
 459                 if (ret)
 460                         goto err;
 461
 462                 udelay(100);
 463                 memcpy(cmd.args, "\x85", 1);
 464                 cmd.wlen = 1;
 465                 cmd.rlen = 1;
 466                 ret = si2168_cmd_execute(client, &cmd);
 467                 if (ret)
 468                         goto err;
 469
 470                 goto warm;
 471         }
 472
 473         /* power up */
 474         memcpy(cmd.args, "\xc0\x06\x01\x0f\x00\x20\x20\x01", 8);
 475         cmd.wlen = 8;
 476         cmd.rlen = 1;
 477         ret = si2168_cmd_execute(client, &cmd);
 478         if (ret)
 479                 goto err;
 480
 481         /* request the firmware, this will block and timeout */
 482         ret = request_firmware(&fw, dev->firmware_name, &client->dev);
 483         if (ret) {
 484                 /* fallback mechanism to handle old name for Si2168 B40 fw */
 485                 if (dev->chip_id == SI2168_CHIP_ID_B40) {
 486                         dev->firmware_name = SI2168_B40_FIRMWARE_FALLBACK;
 487                         ret = request_firmware(&fw, dev->firmware_name,
 488                                                &client->dev);
 489                 }
 490
 491                 if (ret == 0) {
 492                         dev_notice(&client->dev,
 493                                         "please install firmware file '%s'\n",
 494                                         SI2168_B40_FIRMWARE);
 495                 } else {
 496                         dev_err(&client->dev,
 497                                         "firmware file '%s' not found\n",
 498                                         dev->firmware_name);
 499                         goto err_release_firmware;
 500                 }
 501         }
 502
 503         dev_info(&client->dev, "downloading firmware from file '%s'\n",
 504                         dev->firmware_name);
 505
 506         if ((fw->size % 17 == 0) && (fw->data[0] > 5)) {
 507                 /* firmware is in the new format */
 508                 for (remaining = fw->size; remaining > 0; remaining -= 17) {
 509                         len = fw->data[fw->size - remaining];
 510                         if (len > SI2168_ARGLEN) {
 511                                 ret = -EINVAL;
 512                                 break;
 513                         }
 514                         memcpy(cmd.args, &fw->data[(fw->size - remaining) + 1], len);
 515                         cmd.wlen = len;
 516                         cmd.rlen = 1;
 517                         ret = si2168_cmd_execute(client, &cmd);
 518                         if (ret)
 519                                 break;
 520                 }
 521         } else if (fw->size % 8 == 0) {
 522                 /* firmware is in the old format */
 523                 for (remaining = fw->size; remaining > 0; remaining -= 8) {
 524                         len = 8;
 525                         memcpy(cmd.args, &fw->data[fw->size - remaining], len);
 526                         cmd.wlen = len;
 527                         cmd.rlen = 1;
 528                         ret = si2168_cmd_execute(client, &cmd);
 529                         if (ret)
 530                                 break;
 531                 }
 532         } else {
 533                 /* bad or unknown firmware format */
 534                 ret = -EINVAL;
 535         }
 536
 537         if (ret) {
 538                 dev_err(&client->dev, "firmware download failed %d\n", ret);
 539                 goto err_release_firmware;
 540         }
 541
 542         release_firmware(fw);
 543
 544         memcpy(cmd.args, "\x01\x01", 2);
 545         cmd.wlen = 2;
 546         cmd.rlen = 1;
 547         ret = si2168_cmd_execute(client, &cmd);
 548         if (ret)
 549                 goto err;
 550
 551         /* query firmware version */
 552         memcpy(cmd.args, "\x11", 1);
 553         cmd.wlen = 1;
 554         cmd.rlen = 10;
 555         ret = si2168_cmd_execute(client, &cmd);
 556         if (ret)
 557                 goto err;
 558
 559         dev->version = (cmd.args[9] + '@') << 24 | (cmd.args[6] - '0') << 16 |
 560                        (cmd.args[7] - '0') << 8 | (cmd.args[8]) << 0;
 561         dev_info(&client->dev, "firmware version: %c %d.%d.%d\n",
 562                  dev->version >> 24 & 0xff, dev->version >> 16 & 0xff,
 563                  dev->version >> 8 & 0xff, dev->version >> 0 & 0xff);
 564
 565         /* set ts mode */
 566         ret = si2168_ts_bus_ctrl(fe, 1);
 567         if (ret)
 568                 goto err;
 569
 570         dev->warm = true;
 571 warm:
 572         /* Init stats here to indicate which stats are supported */
 573         c->cnr.len = 1;
 574         c->cnr.stat[0].scale = FE_SCALE_NOT_AVAILABLE;
 575         c->post_bit_error.len = 1;
 576         c->post_bit_error.stat[0].scale = FE_SCALE_NOT_AVAILABLE;
 577         c->post_bit_count.len = 1;
 578         c->post_bit_count.stat[0].scale = FE_SCALE_NOT_AVAILABLE;
 579         c->block_error.len = 1;
 580         c->block_error.stat[0].scale = FE_SCALE_NOT_AVAILABLE;
 581
 582         dev->active = true;
 583
 584         return 0;
 585 err_release_firmware:
 586         release_firmware(fw);
 587 err:
 588         dev_dbg(&client->dev, "failed=%d\n", ret);
 589         return ret;
 590 }
 591
 592 static int si2168_sleep(struct dvb_frontend *fe)
 593 {
 594         struct i2c_client *client = fe->demodulator_priv;
 595         struct si2168_dev *dev = i2c_get_clientdata(client);
 596         int ret;
 597         struct si2168_cmd cmd;
 598
 599         dev_dbg(&client->dev, "\n");
 600
 601         dev->active = false;
 602
 603         /* tri-state data bus */
 604         ret = si2168_ts_bus_ctrl(fe, 0);
 605         if (ret)
 606                 goto err;
 607
 608         /* Firmware later than B 4.0-11 loses warm state during sleep */
 609         if (dev->version > ('B' << 24 | 4 << 16 | 0 << 8 | 11 << 0))
 610                 dev->warm = false;
 611
 612         memcpy(cmd.args, "\x13", 1);
 613         cmd.wlen = 1;
 614         cmd.rlen = 0;
 615         ret = si2168_cmd_execute(client, &cmd);
 616         if (ret)
 617                 goto err;
 618
 619         return 0;
 620 err:
 621         dev_dbg(&client->dev, "failed=%d\n", ret);
 622         return ret;
 623 }
 624
 625 static int si2168_get_tune_settings(struct dvb_frontend *fe,
 626         struct dvb_frontend_tune_settings *s)
 627 {
 628         s->min_delay_ms = 900;
 629
 630         return 0;
 631 }
 632
 633 static int si2168_select(struct i2c_mux_core *muxc, u32 chan)
 634 {
 635         struct i2c_client *client = i2c_mux_priv(muxc);
 636         int ret;
 637         struct si2168_cmd cmd;
 638
 639         /* open I2C gate */
 640         memcpy(cmd.args, "\xc0\x0d\x01", 3);
 641         cmd.wlen = 3;
 642         cmd.rlen = 0;
 643         ret = si2168_cmd_execute(client, &cmd);
 644         if (ret)
 645                 goto err;
 646
 647         return 0;
 648 err:
 649         dev_dbg(&client->dev, "failed=%d\n", ret);
 650         return ret;
 651 }
 652
 653 static int si2168_deselect(struct i2c_mux_core *muxc, u32 chan)
 654 {
 655         struct i2c_client *client = i2c_mux_priv(muxc);
 656         int ret;
 657         struct si2168_cmd cmd;
 658
 659         /* close I2C gate */
 660         memcpy(cmd.args, "\xc0\x0d\x00", 3);
 661         cmd.wlen = 3;
 662         cmd.rlen = 0;
 663         ret = si2168_cmd_execute(client, &cmd);
 664         if (ret)
 665                 goto err;
 666
 667         return 0;
 668 err:
 669         dev_dbg(&client->dev, "failed=%d\n", ret);
 670         return ret;
 671 }
 672
 673 static const struct dvb_frontend_ops si2168_ops = {
 674         .delsys = {SYS_DVBT, SYS_DVBT2, SYS_DVBC_ANNEX_A},
 675         .info = {
 676                 .name = "Silicon Labs Si2168",
 677                 .frequency_min_hz      =  48 * MHz,
 678                 .frequency_max_hz      = 870 * MHz,
 679                 .frequency_stepsize_hz = 62500,
 680                 .symbol_rate_min       = 1000000,
 681                 .symbol_rate_max       = 7200000,
 682                 .caps = FE_CAN_FEC_1_2 |
 683                         FE_CAN_FEC_2_3 |
 684                         FE_CAN_FEC_3_4 |
 685                         FE_CAN_FEC_5_6 |
 686                         FE_CAN_FEC_7_8 |
 687                         FE_CAN_FEC_AUTO |
 688                         FE_CAN_QPSK |
 689                         FE_CAN_QAM_16 |
 690                         FE_CAN_QAM_32 |
 691                         FE_CAN_QAM_64 |
 692                         FE_CAN_QAM_128 |
 693                         FE_CAN_QAM_256 |
 694                         FE_CAN_QAM_AUTO |
 695                         FE_CAN_TRANSMISSION_MODE_AUTO |
 696                         FE_CAN_GUARD_INTERVAL_AUTO |
 697                         FE_CAN_HIERARCHY_AUTO |
 698                         FE_CAN_MUTE_TS |
 699                         FE_CAN_2G_MODULATION |
 700                         FE_CAN_MULTISTREAM
 701         },
 702
 703         .get_tune_settings = si2168_get_tune_settings,
 704
 705         .init = si2168_init,
 706         .sleep = si2168_sleep,
 707
 708         .set_frontend = si2168_set_frontend,
 709
 710         .read_status = si2168_read_status,
 711 };
 712
 713 static int si2168_probe(struct i2c_client *client,
 714                 const struct i2c_device_id *id)
 715 {
 716         struct si2168_config *config = client->dev.platform_data;
 717         struct si2168_dev *dev;
 718         int ret;
 719         struct si2168_cmd cmd;
 720
 721         dev_dbg(&client->dev, "\n");
 722
 723         dev = kzalloc(sizeof(*dev), GFP_KERNEL);
 724         if (!dev) {
 725                 ret = -ENOMEM;
 726                 goto err;
 727         }
 728
 729         i2c_set_clientdata(client, dev);
 730         mutex_init(&dev->i2c_mutex);
 731
 732         /* Initialize */
 733         memcpy(cmd.args, "\xc0\x12\x00\x0c\x00\x0d\x16\x00\x00\x00\x00\x00\x00", 13);
 734         cmd.wlen = 13;
 735         cmd.rlen = 0;
 736         ret = si2168_cmd_execute(client, &cmd);
 737         if (ret)
 738                 goto err_kfree;
 739
 740         /* Power up */
 741         memcpy(cmd.args, "\xc0\x06\x01\x0f\x00\x20\x20\x01", 8);
 742         cmd.wlen = 8;
 743         cmd.rlen = 1;
 744         ret = si2168_cmd_execute(client, &cmd);
 745         if (ret)
 746                 goto err_kfree;
 747
 748         /* Query chip revision */
 749         memcpy(cmd.args, "\x02", 1);
 750         cmd.wlen = 1;
 751         cmd.rlen = 13;
 752         ret = si2168_cmd_execute(client, &cmd);
 753         if (ret)
 754                 goto err_kfree;
 755
 756         dev->chip_id = cmd.args[1] << 24 | cmd.args[2] << 16 |
 757                        cmd.args[3] << 8 | cmd.args[4] << 0;
 758
 759         switch (dev->chip_id) {
 760         case SI2168_CHIP_ID_A20:
 761                 dev->firmware_name = SI2168_A20_FIRMWARE;
 762                 break;
 763         case SI2168_CHIP_ID_A30:
 764                 dev->firmware_name = SI2168_A30_FIRMWARE;
 765                 break;
 766         case SI2168_CHIP_ID_B40:
 767                 dev->firmware_name = SI2168_B40_FIRMWARE;
 768                 break;
 769         case SI2168_CHIP_ID_D60:
 770                 dev->firmware_name = SI2168_D60_FIRMWARE;
 771                 break;
 772         default:
 773                 dev_dbg(&client->dev, "unknown chip version Si21%d-%c%c%c\n",
 774                         cmd.args[2], cmd.args[1], cmd.args[3], cmd.args[4]);
 775                 ret = -ENODEV;
 776                 goto err_kfree;
 777         }
 778
 779         dev->version = (cmd.args[1]) << 24 | (cmd.args[3] - '0') << 16 |
 780                        (cmd.args[4] - '0') << 8 | (cmd.args[5]) << 0;
 781
 782         /* create mux i2c adapter for tuner */
 783         dev->muxc = i2c_mux_alloc(client->adapter, &client->dev,
 784                                   1, 0, I2C_MUX_LOCKED,
 785                                   si2168_select, si2168_deselect);
 786         if (!dev->muxc) {
 787                 ret = -ENOMEM;
 788                 goto err_kfree;
 789         }
 790         dev->muxc->priv = client;
 791         ret = i2c_mux_add_adapter(dev->muxc, 0, 0, 0);
 792         if (ret)
 793                 goto err_kfree;
 794
 795         /* create dvb_frontend */
 796         memcpy(&dev->fe.ops, &si2168_ops, sizeof(struct dvb_frontend_ops));
 797         dev->fe.demodulator_priv = client;
 798         *config->i2c_adapter = dev->muxc->adapter[0];
 799         *config->fe = &dev->fe;
 800         dev->ts_mode = config->ts_mode;
 801         dev->ts_clock_inv = config->ts_clock_inv;
 802         dev->ts_clock_gapped = config->ts_clock_gapped;
 803         dev->spectral_inversion = config->spectral_inversion;
 804
 805         dev_info(&client->dev, "Silicon Labs Si2168-%c%d%d successfully identified\n",
 806                  dev->version >> 24 & 0xff, dev->version >> 16 & 0xff,
 807                  dev->version >> 8 & 0xff);
 808         dev_info(&client->dev, "firmware version: %c %d.%d.%d\n",
 809                  dev->version >> 24 & 0xff, dev->version >> 16 & 0xff,
 810                  dev->version >> 8 & 0xff, dev->version >> 0 & 0xff);
 811
 812         return 0;
 813 err_kfree:
 814         kfree(dev);
 815 err:
 816         dev_warn(&client->dev, "probe failed = %d\n", ret);
 817         return ret;
 818 }
 819
 820 static int si2168_remove(struct i2c_client *client)
 821 {
 822         struct si2168_dev *dev = i2c_get_clientdata(client);
 823
 824         dev_dbg(&client->dev, "\n");
 825
 826         i2c_mux_del_adapters(dev->muxc);
 827
 828         dev->fe.ops.release = NULL;
 829         dev->fe.demodulator_priv = NULL;
 830
 831         kfree(dev);
 832
 833         return 0;
 834 }
 835
 836 static const struct i2c_device_id si2168_id_table[] = {
 837         {"si2168", 0},
 838         {}
 839 };
 840 MODULE_DEVICE_TABLE(i2c, si2168_id_table);
 841
 842 static struct i2c_driver si2168_driver = {
 843         .driver = {
 844                 .name                = "si2168",
 845                 .suppress_bind_attrs = true,
 846         },
 847         .probe          = si2168_probe,
 848         .remove         = si2168_remove,
 849         .id_table       = si2168_id_table,
 850 };
 851
 852 module_i2c_driver(si2168_driver);
 853
 854 MODULE_AUTHOR("Antti Palosaari <crope@iki.fi>");
 855 MODULE_DESCRIPTION("Silicon Labs Si2168 DVB-T/T2/C demodulator driver");
 856 MODULE_LICENSE("GPL");
 857 MODULE_FIRMWARE(SI2168_A20_FIRMWARE);
 858 MODULE_FIRMWARE(SI2168_A30_FIRMWARE);
 859 MODULE_FIRMWARE(SI2168_B40_FIRMWARE);
 860 MODULE_FIRMWARE(SI2168_D60_FIRMWARE);