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 <[email protected]>
   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 static void cmd_init(struct si2168_cmd *cmd, const u8 *buf, int wlen, int rlen)
  15 {
  16         memcpy(cmd->args, buf, wlen);
  17         cmd->wlen = wlen;
  18         cmd->rlen = rlen;
  19 }
  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_ts_bus_ctrl(struct dvb_frontend *fe, int acquire)
  84 {
  85         struct i2c_client *client = fe->demodulator_priv;
  86         struct si2168_dev *dev = i2c_get_clientdata(client);
  87         struct si2168_cmd cmd;
  88         int ret = 0;
  89
  90         dev_dbg(&client->dev, "%s acquire: %d\n", __func__, acquire);
  91
  92         /* set manual value */
  93         if (dev->ts_mode & SI2168_TS_CLK_MANUAL) {
  94                 cmd_init(&cmd, "\x14\x00\x0d\x10\xe8\x03", 6, 4);
  95                 ret = si2168_cmd_execute(client, &cmd);
  96                 if (ret)
  97                         return ret;
  98         }
  99         /* set TS_MODE property */
 100         cmd_init(&cmd, "\x14\x00\x01\x10\x10\x00", 6, 4);
 101         if (dev->ts_mode & SI2168_TS_CLK_MANUAL)
 102                 cmd.args[4] = SI2168_TS_CLK_MANUAL;
 103         if (acquire)
 104                 cmd.args[4] |= dev->ts_mode;
 105         else
 106                 cmd.args[4] |= SI2168_TS_TRISTATE;
 107         if (dev->ts_clock_gapped)
 108                 cmd.args[4] |= 0x40;
 109         ret = si2168_cmd_execute(client, &cmd);
 110
 111         return ret;
 112 }
 113
 114 static int si2168_read_status(struct dvb_frontend *fe, enum fe_status *status)
 115 {
 116         struct i2c_client *client = fe->demodulator_priv;
 117         struct si2168_dev *dev = i2c_get_clientdata(client);
 118         struct dtv_frontend_properties *c = &fe->dtv_property_cache;
 119         int ret, i;
 120         unsigned int utmp, utmp1, utmp2;
 121         struct si2168_cmd cmd;
 122
 123         *status = 0;
 124
 125         if (!dev->active) {
 126                 ret = -EAGAIN;
 127                 goto err;
 128         }
 129
 130         switch (c->delivery_system) {
 131         case SYS_DVBT:
 132                 cmd_init(&cmd, "\xa0\x01", 2, 13);
 133                 break;
 134         case SYS_DVBC_ANNEX_A:
 135                 cmd_init(&cmd, "\x90\x01", 2, 9);
 136                 break;
 137         case SYS_DVBT2:
 138                 cmd_init(&cmd, "\x50\x01", 2, 14);
 139                 break;
 140         default:
 141                 ret = -EINVAL;
 142                 goto err;
 143         }
 144
 145         ret = si2168_cmd_execute(client, &cmd);
 146         if (ret)
 147                 goto err;
 148
 149         switch ((cmd.args[2] >> 1) & 0x03) {
 150         case 0x01:
 151                 *status = FE_HAS_SIGNAL | FE_HAS_CARRIER;
 152                 break;
 153         case 0x03:
 154                 *status = FE_HAS_SIGNAL | FE_HAS_CARRIER | FE_HAS_VITERBI |
 155                                 FE_HAS_SYNC | FE_HAS_LOCK;
 156                 break;
 157         }
 158
 159         dev->fe_status = *status;
 160
 161         if (*status & FE_HAS_LOCK) {
 162                 c->cnr.len = 1;
 163                 c->cnr.stat[0].scale = FE_SCALE_DECIBEL;
 164                 c->cnr.stat[0].svalue = cmd.args[3] * 1000 / 4;
 165         } else {
 166                 c->cnr.len = 1;
 167                 c->cnr.stat[0].scale = FE_SCALE_NOT_AVAILABLE;
 168         }
 169
 170         dev_dbg(&client->dev, "status=%02x args=%*ph\n",
 171                         *status, cmd.rlen, cmd.args);
 172
 173         /* BER */
 174         if (*status & FE_HAS_VITERBI) {
 175                 cmd_init(&cmd, "\x82\x00", 2, 3);
 176                 ret = si2168_cmd_execute(client, &cmd);
 177                 if (ret)
 178                         goto err;
 179
 180                 /*
 181                  * Firmware returns [0, 255] mantissa and [0, 8] exponent.
 182                  * Convert to DVB API: mantissa * 10^(8 - exponent) / 10^8
 183                  */
 184                 utmp = clamp(8 - cmd.args[1], 0, 8);
 185                 for (i = 0, utmp1 = 1; i < utmp; i++)
 186                         utmp1 = utmp1 * 10;
 187
 188                 utmp1 = cmd.args[2] * utmp1;
 189                 utmp2 = 100000000; /* 10^8 */
 190
 191                 dev_dbg(&client->dev,
 192                         "post_bit_error=%u post_bit_count=%u ber=%u*10^-%u\n",
 193                         utmp1, utmp2, cmd.args[2], cmd.args[1]);
 194
 195                 c->post_bit_error.stat[0].scale = FE_SCALE_COUNTER;
 196                 c->post_bit_error.stat[0].uvalue += utmp1;
 197                 c->post_bit_count.stat[0].scale = FE_SCALE_COUNTER;
 198                 c->post_bit_count.stat[0].uvalue += utmp2;
 199         } else {
 200                 c->post_bit_error.stat[0].scale = FE_SCALE_NOT_AVAILABLE;
 201                 c->post_bit_count.stat[0].scale = FE_SCALE_NOT_AVAILABLE;
 202         }
 203
 204         /* UCB */
 205         if (*status & FE_HAS_SYNC) {
 206                 cmd_init(&cmd, "\x84\x01", 2, 3);
 207                 ret = si2168_cmd_execute(client, &cmd);
 208                 if (ret)
 209                         goto err;
 210
 211                 utmp1 = cmd.args[2] << 8 | cmd.args[1] << 0;
 212                 dev_dbg(&client->dev, "block_error=%u\n", utmp1);
 213
 214                 /* Sometimes firmware returns bogus value */
 215                 if (utmp1 == 0xffff)
 216                         utmp1 = 0;
 217
 218                 c->block_error.stat[0].scale = FE_SCALE_COUNTER;
 219                 c->block_error.stat[0].uvalue += utmp1;
 220         } else {
 221                 c->block_error.stat[0].scale = FE_SCALE_NOT_AVAILABLE;
 222         }
 223
 224         return 0;
 225 err:
 226         dev_dbg(&client->dev, "failed=%d\n", ret);
 227         return ret;
 228 }
 229
 230 static int si2168_set_frontend(struct dvb_frontend *fe)
 231 {
 232         struct i2c_client *client = fe->demodulator_priv;
 233         struct si2168_dev *dev = i2c_get_clientdata(client);
 234         struct dtv_frontend_properties *c = &fe->dtv_property_cache;
 235         int ret;
 236         struct si2168_cmd cmd;
 237         u8 bandwidth, delivery_system;
 238
 239         dev_dbg(&client->dev,
 240                         "delivery_system=%u modulation=%u frequency=%u bandwidth_hz=%u symbol_rate=%u inversion=%u stream_id=%u\n",
 241                         c->delivery_system, c->modulation, c->frequency,
 242                         c->bandwidth_hz, c->symbol_rate, c->inversion,
 243                         c->stream_id);
 244
 245         if (!dev->active) {
 246                 ret = -EAGAIN;
 247                 goto err;
 248         }
 249
 250         switch (c->delivery_system) {
 251         case SYS_DVBT:
 252                 delivery_system = 0x20;
 253                 break;
 254         case SYS_DVBC_ANNEX_A:
 255                 delivery_system = 0x30;
 256                 break;
 257         case SYS_DVBT2:
 258                 delivery_system = 0x70;
 259                 break;
 260         default:
 261                 ret = -EINVAL;
 262                 goto err;
 263         }
 264
 265         if (c->bandwidth_hz == 0) {
 266                 ret = -EINVAL;
 267                 goto err;
 268         } else if (c->bandwidth_hz <= 2000000)
 269                 bandwidth = 0x02;
 270         else if (c->bandwidth_hz <= 5000000)
 271                 bandwidth = 0x05;
 272         else if (c->bandwidth_hz <= 6000000)
 273                 bandwidth = 0x06;
 274         else if (c->bandwidth_hz <= 7000000)
 275                 bandwidth = 0x07;
 276         else if (c->bandwidth_hz <= 8000000)
 277                 bandwidth = 0x08;
 278         else if (c->bandwidth_hz <= 9000000)
 279                 bandwidth = 0x09;
 280         else if (c->bandwidth_hz <= 10000000)
 281                 bandwidth = 0x0a;
 282         else
 283                 bandwidth = 0x0f;
 284
 285         /* program tuner */
 286         if (fe->ops.tuner_ops.set_params) {
 287                 ret = fe->ops.tuner_ops.set_params(fe);
 288                 if (ret)
 289                         goto err;
 290         }
 291
 292         cmd_init(&cmd, "\x88\x02\x02\x02\x02", 5, 5);
 293         ret = si2168_cmd_execute(client, &cmd);
 294         if (ret)
 295                 goto err;
 296
 297         /* that has no big effect */
 298         if (c->delivery_system == SYS_DVBT)
 299                 cmd_init(&cmd, "\x89\x21\x06\x11\xff\x98", 6, 3);
 300         else if (c->delivery_system == SYS_DVBC_ANNEX_A)
 301                 cmd_init(&cmd, "\x89\x21\x06\x11\x89\xf0", 6, 3);
 302         else if (c->delivery_system == SYS_DVBT2)
 303                 cmd_init(&cmd, "\x89\x21\x06\x11\x89\x20", 6, 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         cmd_init(&cmd, "\x51\x03", 2, 12);
 321         ret = si2168_cmd_execute(client, &cmd);
 322         if (ret)
 323                 goto err;
 324
 325         cmd_init(&cmd, "\x12\x08\x04", 3, 3);
 326         ret = si2168_cmd_execute(client, &cmd);
 327         if (ret)
 328                 goto err;
 329
 330         cmd_init(&cmd, "\x14\x00\x0c\x10\x12\x00", 6, 4);
 331         ret = si2168_cmd_execute(client, &cmd);
 332         if (ret)
 333                 goto err;
 334
 335         cmd_init(&cmd, "\x14\x00\x06\x10\x24\x00", 6, 4);
 336         ret = si2168_cmd_execute(client, &cmd);
 337         if (ret)
 338                 goto err;
 339
 340         cmd_init(&cmd, "\x14\x00\x07\x10\x00\x24", 6, 4);
 341         ret = si2168_cmd_execute(client, &cmd);
 342         if (ret)
 343                 goto err;
 344
 345         cmd_init(&cmd, "\x14\x00\x0a\x10\x00\x00", 6, 4);
 346         cmd.args[4] = delivery_system | bandwidth;
 347         if (dev->spectral_inversion)
 348                 cmd.args[5] |= 1;
 349         ret = si2168_cmd_execute(client, &cmd);
 350         if (ret)
 351                 goto err;
 352
 353         /* set DVB-C symbol rate */
 354         if (c->delivery_system == SYS_DVBC_ANNEX_A) {
 355                 cmd_init(&cmd, "\x14\x00\x02\x11\x00\x00", 6, 4);
 356                 cmd.args[4] = ((c->symbol_rate / 1000) >> 0) & 0xff;
 357                 cmd.args[5] = ((c->symbol_rate / 1000) >> 8) & 0xff;
 358                 ret = si2168_cmd_execute(client, &cmd);
 359                 if (ret)
 360                         goto err;
 361         }
 362
 363         cmd_init(&cmd, "\x14\x00\x0f\x10\x10\x00", 6, 4);
 364         ret = si2168_cmd_execute(client, &cmd);
 365         if (ret)
 366                 goto err;
 367
 368         cmd_init(&cmd, "\x14\x00\x09\x10\xe3\x08", 6, 4);
 369         cmd.args[5] |= dev->ts_clock_inv ? 0x00 : 0x10;
 370         ret = si2168_cmd_execute(client, &cmd);
 371         if (ret)
 372                 goto err;
 373
 374         cmd_init(&cmd, "\x14\x00\x08\x10\xd7\x05", 6, 4);
 375         cmd.args[5] |= dev->ts_clock_inv ? 0x00 : 0x10;
 376         ret = si2168_cmd_execute(client, &cmd);
 377         if (ret)
 378                 goto err;
 379
 380         cmd_init(&cmd, "\x14\x00\x01\x12\x00\x00", 6, 4);
 381         ret = si2168_cmd_execute(client, &cmd);
 382         if (ret)
 383                 goto err;
 384
 385         cmd_init(&cmd, "\x14\x00\x01\x03\x0c\x00", 6, 4);
 386         ret = si2168_cmd_execute(client, &cmd);
 387         if (ret)
 388                 goto err;
 389
 390         cmd_init(&cmd, "\x85", 1, 1);
 391         ret = si2168_cmd_execute(client, &cmd);
 392         if (ret)
 393                 goto err;
 394
 395         dev->delivery_system = c->delivery_system;
 396
 397         /* enable ts bus */
 398         ret = si2168_ts_bus_ctrl(fe, 1);
 399         if (ret)
 400                 goto err;
 401
 402         return 0;
 403 err:
 404         dev_dbg(&client->dev, "failed=%d\n", ret);
 405         return ret;
 406 }
 407
 408 static int si2168_init(struct dvb_frontend *fe)
 409 {
 410         struct i2c_client *client = fe->demodulator_priv;
 411         struct si2168_dev *dev = i2c_get_clientdata(client);
 412         struct dtv_frontend_properties *c = &fe->dtv_property_cache;
 413         int ret, len, remaining;
 414         const struct firmware *fw;
 415         struct si2168_cmd cmd;
 416
 417         dev_dbg(&client->dev, "\n");
 418
 419         /* initialize */
 420         cmd_init(&cmd, "\xc0\x12\x00\x0c\x00\x0d\x16\x00\x00\x00\x00\x00\x00",
 421                  13, 0);
 422         ret = si2168_cmd_execute(client, &cmd);
 423         if (ret)
 424                 goto err;
 425
 426         if (dev->warm) {
 427                 /* resume */
 428                 cmd_init(&cmd, "\xc0\x06\x08\x0f\x00\x20\x21\x01", 8, 1);
 429                 ret = si2168_cmd_execute(client, &cmd);
 430                 if (ret)
 431                         goto err;
 432
 433                 udelay(100);
 434                 cmd_init(&cmd, "\x85", 1, 1);
 435                 ret = si2168_cmd_execute(client, &cmd);
 436                 if (ret)
 437                         goto err;
 438
 439                 goto warm;
 440         }
 441
 442         /* power up */
 443         cmd_init(&cmd, "\xc0\x06\x01\x0f\x00\x20\x20\x01", 8, 1);
 444         ret = si2168_cmd_execute(client, &cmd);
 445         if (ret)
 446                 goto err;
 447
 448         /* request the firmware, this will block and timeout */
 449         ret = request_firmware(&fw, dev->firmware_name, &client->dev);
 450         if (ret) {
 451                 dev_err(&client->dev,
 452                         "firmware file '%s' not found\n",
 453                         dev->firmware_name);
 454                 goto err_release_firmware;
 455         }
 456
 457         dev_info(&client->dev, "downloading firmware from file '%s'\n",
 458                         dev->firmware_name);
 459
 460         if ((fw->size % 17 == 0) && (fw->data[0] > 5)) {
 461                 /* firmware is in the new format */
 462                 for (remaining = fw->size; remaining > 0; remaining -= 17) {
 463                         len = fw->data[fw->size - remaining];
 464                         if (len > SI2168_ARGLEN) {
 465                                 ret = -EINVAL;
 466                                 break;
 467                         }
 468                         cmd_init(&cmd, &fw->data[(fw->size - remaining) + 1],
 469                                  len, 1);
 470                         ret = si2168_cmd_execute(client, &cmd);
 471                         if (ret)
 472                                 break;
 473                 }
 474         } else if (fw->size % 8 == 0) {
 475                 /* firmware is in the old format */
 476                 for (remaining = fw->size; remaining > 0; remaining -= 8) {
 477                         cmd_init(&cmd, &fw->data[fw->size - remaining], 8, 1);
 478                         ret = si2168_cmd_execute(client, &cmd);
 479                         if (ret)
 480                                 break;
 481                 }
 482         } else {
 483                 /* bad or unknown firmware format */
 484                 ret = -EINVAL;
 485         }
 486
 487         if (ret) {
 488                 dev_err(&client->dev, "firmware download failed %d\n", ret);
 489                 goto err_release_firmware;
 490         }
 491
 492         release_firmware(fw);
 493
 494         cmd_init(&cmd, "\x01\x01", 2, 1);
 495         ret = si2168_cmd_execute(client, &cmd);
 496         if (ret)
 497                 goto err;
 498
 499         /* query firmware version */
 500         cmd_init(&cmd, "\x11", 1, 10);
 501         ret = si2168_cmd_execute(client, &cmd);
 502         if (ret)
 503                 goto err;
 504
 505         dev->version = (cmd.args[9] + '@') << 24 | (cmd.args[6] - '0') << 16 |
 506                        (cmd.args[7] - '0') << 8 | (cmd.args[8]) << 0;
 507         dev_info(&client->dev, "firmware version: %c %d.%d.%d\n",
 508                  dev->version >> 24 & 0xff, dev->version >> 16 & 0xff,
 509                  dev->version >> 8 & 0xff, dev->version >> 0 & 0xff);
 510
 511         /* set ts mode */
 512         ret = si2168_ts_bus_ctrl(fe, 1);
 513         if (ret)
 514                 goto err;
 515
 516         dev->warm = true;
 517         dev->initialized = true;
 518 warm:
 519         /* Init stats here to indicate which stats are supported */
 520         c->cnr.len = 1;
 521         c->cnr.stat[0].scale = FE_SCALE_NOT_AVAILABLE;
 522         c->post_bit_error.len = 1;
 523         c->post_bit_error.stat[0].scale = FE_SCALE_NOT_AVAILABLE;
 524         c->post_bit_count.len = 1;
 525         c->post_bit_count.stat[0].scale = FE_SCALE_NOT_AVAILABLE;
 526         c->block_error.len = 1;
 527         c->block_error.stat[0].scale = FE_SCALE_NOT_AVAILABLE;
 528
 529         dev->active = true;
 530
 531         return 0;
 532 err_release_firmware:
 533         release_firmware(fw);
 534 err:
 535         dev_dbg(&client->dev, "failed=%d\n", ret);
 536         return ret;
 537 }
 538
 539 static int si2168_resume(struct dvb_frontend *fe)
 540 {
 541         struct i2c_client *client = fe->demodulator_priv;
 542         struct si2168_dev *dev = i2c_get_clientdata(client);
 543
 544         /*
 545          * check whether si2168_init() has been called successfully
 546          * outside of a resume cycle. Only call it (and load firmware)
 547          * in this case. si2168_init() is only called during resume
 548          * once the device has actually been used. Otherwise, leave the
 549          * device untouched.
 550          */
 551         if (dev->initialized) {
 552                 dev_dbg(&client->dev, "previously initialized, call si2168_init()\n");
 553                 return si2168_init(fe);
 554         }
 555         dev_dbg(&client->dev, "not initialized yet, skipping init on resume\n");
 556         return 0;
 557 }
 558
 559 static int si2168_sleep(struct dvb_frontend *fe)
 560 {
 561         struct i2c_client *client = fe->demodulator_priv;
 562         struct si2168_dev *dev = i2c_get_clientdata(client);
 563         int ret;
 564         struct si2168_cmd cmd;
 565
 566         dev_dbg(&client->dev, "\n");
 567
 568         dev->active = false;
 569
 570         /* tri-state data bus */
 571         ret = si2168_ts_bus_ctrl(fe, 0);
 572         if (ret)
 573                 goto err;
 574
 575         /* Firmware later than B 4.0-11 loses warm state during sleep */
 576         if (dev->version > ('B' << 24 | 4 << 16 | 0 << 8 | 11 << 0))
 577                 dev->warm = false;
 578
 579         cmd_init(&cmd, "\x13", 1, 0);
 580         ret = si2168_cmd_execute(client, &cmd);
 581         if (ret)
 582                 goto err;
 583
 584         return 0;
 585 err:
 586         dev_dbg(&client->dev, "failed=%d\n", ret);
 587         return ret;
 588 }
 589
 590 static int si2168_get_tune_settings(struct dvb_frontend *fe,
 591         struct dvb_frontend_tune_settings *s)
 592 {
 593         s->min_delay_ms = 900;
 594
 595         return 0;
 596 }
 597
 598 static int si2168_select(struct i2c_mux_core *muxc, u32 chan)
 599 {
 600         struct i2c_client *client = i2c_mux_priv(muxc);
 601         int ret;
 602         struct si2168_cmd cmd;
 603
 604         /* open I2C gate */
 605         cmd_init(&cmd, "\xc0\x0d\x01", 3, 0);
 606         ret = si2168_cmd_execute(client, &cmd);
 607         if (ret)
 608                 goto err;
 609
 610         return 0;
 611 err:
 612         dev_dbg(&client->dev, "failed=%d\n", ret);
 613         return ret;
 614 }
 615
 616 static int si2168_deselect(struct i2c_mux_core *muxc, u32 chan)
 617 {
 618         struct i2c_client *client = i2c_mux_priv(muxc);
 619         int ret;
 620         struct si2168_cmd cmd;
 621
 622         /* close I2C gate */
 623         cmd_init(&cmd, "\xc0\x0d\x00", 3, 0);
 624         ret = si2168_cmd_execute(client, &cmd);
 625         if (ret)
 626                 goto err;
 627
 628         return 0;
 629 err:
 630         dev_dbg(&client->dev, "failed=%d\n", ret);
 631         return ret;
 632 }
 633
 634 static const struct dvb_frontend_ops si2168_ops = {
 635         .delsys = {SYS_DVBT, SYS_DVBT2, SYS_DVBC_ANNEX_A},
 636         .info = {
 637                 .name = "Silicon Labs Si2168",
 638                 .frequency_min_hz      =  48 * MHz,
 639                 .frequency_max_hz      = 870 * MHz,
 640                 .frequency_stepsize_hz = 62500,
 641                 .symbol_rate_min       = 1000000,
 642                 .symbol_rate_max       = 7200000,
 643                 .caps = FE_CAN_FEC_1_2 |
 644                         FE_CAN_FEC_2_3 |
 645                         FE_CAN_FEC_3_4 |
 646                         FE_CAN_FEC_5_6 |
 647                         FE_CAN_FEC_7_8 |
 648                         FE_CAN_FEC_AUTO |
 649                         FE_CAN_QPSK |
 650                         FE_CAN_QAM_16 |
 651                         FE_CAN_QAM_32 |
 652                         FE_CAN_QAM_64 |
 653                         FE_CAN_QAM_128 |
 654                         FE_CAN_QAM_256 |
 655                         FE_CAN_QAM_AUTO |
 656                         FE_CAN_TRANSMISSION_MODE_AUTO |
 657                         FE_CAN_GUARD_INTERVAL_AUTO |
 658                         FE_CAN_HIERARCHY_AUTO |
 659                         FE_CAN_MUTE_TS |
 660                         FE_CAN_2G_MODULATION |
 661                         FE_CAN_MULTISTREAM
 662         },
 663
 664         .get_tune_settings = si2168_get_tune_settings,
 665
 666         .init = si2168_init,
 667         .sleep = si2168_sleep,
 668         .resume = si2168_resume,
 669
 670         .set_frontend = si2168_set_frontend,
 671
 672         .read_status = si2168_read_status,
 673 };
 674
 675 static int si2168_probe(struct i2c_client *client)
 676 {
 677         struct si2168_config *config = client->dev.platform_data;
 678         struct si2168_dev *dev;
 679         int ret;
 680         struct si2168_cmd cmd;
 681
 682         dev_dbg(&client->dev, "\n");
 683
 684         dev = kzalloc(sizeof(*dev), GFP_KERNEL);
 685         if (!dev) {
 686                 ret = -ENOMEM;
 687                 goto err;
 688         }
 689
 690         i2c_set_clientdata(client, dev);
 691         mutex_init(&dev->i2c_mutex);
 692
 693         /* Initialize */
 694         cmd_init(&cmd, "\xc0\x12\x00\x0c\x00\x0d\x16\x00\x00\x00\x00\x00\x00",
 695                  13, 0);
 696         ret = si2168_cmd_execute(client, &cmd);
 697         if (ret)
 698                 goto err_kfree;
 699
 700         /* Power up */
 701         cmd_init(&cmd, "\xc0\x06\x01\x0f\x00\x20\x20\x01", 8, 1);
 702         ret = si2168_cmd_execute(client, &cmd);
 703         if (ret)
 704                 goto err_kfree;
 705
 706         /* Query chip revision */
 707         cmd_init(&cmd, "\x02", 1, 13);
 708         ret = si2168_cmd_execute(client, &cmd);
 709         if (ret)
 710                 goto err_kfree;
 711
 712         dev->chip_id = cmd.args[1] << 24 | cmd.args[2] << 16 |
 713                        cmd.args[3] << 8 | cmd.args[4] << 0;
 714
 715         switch (dev->chip_id) {
 716         case SI2168_CHIP_ID_A20:
 717                 dev->firmware_name = SI2168_A20_FIRMWARE;
 718                 break;
 719         case SI2168_CHIP_ID_A30:
 720                 dev->firmware_name = SI2168_A30_FIRMWARE;
 721                 break;
 722         case SI2168_CHIP_ID_B40:
 723                 dev->firmware_name = SI2168_B40_FIRMWARE;
 724                 break;
 725         case SI2168_CHIP_ID_D60:
 726                 dev->firmware_name = SI2168_D60_FIRMWARE;
 727                 break;
 728         default:
 729                 dev_dbg(&client->dev, "unknown chip version Si21%d-%c%c%c\n",
 730                         cmd.args[2], cmd.args[1], cmd.args[3], cmd.args[4]);
 731                 ret = -ENODEV;
 732                 goto err_kfree;
 733         }
 734
 735         dev->version = (cmd.args[1]) << 24 | (cmd.args[3] - '0') << 16 |
 736                        (cmd.args[4] - '0') << 8 | (cmd.args[5]) << 0;
 737
 738         /* create mux i2c adapter for tuner */
 739         dev->muxc = i2c_mux_alloc(client->adapter, &client->dev,
 740                                   1, 0, I2C_MUX_LOCKED,
 741                                   si2168_select, si2168_deselect);
 742         if (!dev->muxc) {
 743                 ret = -ENOMEM;
 744                 goto err_kfree;
 745         }
 746         dev->muxc->priv = client;
 747         ret = i2c_mux_add_adapter(dev->muxc, 0, 0, 0);
 748         if (ret)
 749                 goto err_kfree;
 750
 751         /* create dvb_frontend */
 752         memcpy(&dev->fe.ops, &si2168_ops, sizeof(struct dvb_frontend_ops));
 753         dev->fe.demodulator_priv = client;
 754         *config->i2c_adapter = dev->muxc->adapter[0];
 755         *config->fe = &dev->fe;
 756         dev->ts_mode = config->ts_mode;
 757         dev->ts_clock_inv = config->ts_clock_inv;
 758         dev->ts_clock_gapped = config->ts_clock_gapped;
 759         dev->spectral_inversion = config->spectral_inversion;
 760
 761         dev_info(&client->dev, "Silicon Labs Si2168-%c%d%d successfully identified\n",
 762                  dev->version >> 24 & 0xff, dev->version >> 16 & 0xff,
 763                  dev->version >> 8 & 0xff);
 764         dev_info(&client->dev, "firmware version: %c %d.%d.%d\n",
 765                  dev->version >> 24 & 0xff, dev->version >> 16 & 0xff,
 766                  dev->version >> 8 & 0xff, dev->version >> 0 & 0xff);
 767
 768         return 0;
 769 err_kfree:
 770         kfree(dev);
 771 err:
 772         dev_warn(&client->dev, "probe failed = %d\n", ret);
 773         return ret;
 774 }
 775
 776 static void si2168_remove(struct i2c_client *client)
 777 {
 778         struct si2168_dev *dev = i2c_get_clientdata(client);
 779
 780         dev_dbg(&client->dev, "\n");
 781
 782         i2c_mux_del_adapters(dev->muxc);
 783
 784         dev->fe.ops.release = NULL;
 785         dev->fe.demodulator_priv = NULL;
 786
 787         kfree(dev);
 788 }
 789
 790 static const struct i2c_device_id si2168_id_table[] = {
 791         {"si2168", 0},
 792         {}
 793 };
 794 MODULE_DEVICE_TABLE(i2c, si2168_id_table);
 795
 796 static struct i2c_driver si2168_driver = {
 797         .driver = {
 798                 .name                = "si2168",
 799                 .suppress_bind_attrs = true,
 800         },
 801         .probe          = si2168_probe,
 802         .remove         = si2168_remove,
 803         .id_table       = si2168_id_table,
 804 };
 805
 806 module_i2c_driver(si2168_driver);
 807
 808 MODULE_AUTHOR("Antti Palosaari <[email protected]>");
 809 MODULE_DESCRIPTION("Silicon Labs Si2168 DVB-T/T2/C demodulator driver");
 810 MODULE_LICENSE("GPL");
 811 MODULE_FIRMWARE(SI2168_A20_FIRMWARE);
 812 MODULE_FIRMWARE(SI2168_A30_FIRMWARE);
 813 MODULE_FIRMWARE(SI2168_B40_FIRMWARE);
 814 MODULE_FIRMWARE(SI2168_D60_FIRMWARE);