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