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 manual value */
  86         if (dev->ts_mode & SI2168_TS_CLK_MANUAL) {
  87                 memcpy(cmd.args, "\x14\x00\x0d\x10\xe8\x03", 6);
  88                 cmd.wlen = 6;
  89                 cmd.rlen = 4;
  90                 ret = si2168_cmd_execute(client, &cmd);
  91                 if (ret)
  92                         return ret;
  93         }
  94         /* set TS_MODE property */
  95         memcpy(cmd.args, "\x14\x00\x01\x10\x10\x00", 6);
  96         if (dev->ts_mode & SI2168_TS_CLK_MANUAL)
  97                 cmd.args[4] = SI2168_TS_CLK_MANUAL;
  98         if (acquire)
  99                 cmd.args[4] |= dev->ts_mode;
 100         else
 101                 cmd.args[4] |= SI2168_TS_TRISTATE;
 102         if (dev->ts_clock_gapped)
 103                 cmd.args[4] |= 0x40;
 104         cmd.wlen = 6;
 105         cmd.rlen = 4;
 106         ret = si2168_cmd_execute(client, &cmd);
 107
 108         return ret;
 109 }
 110
 111 static int si2168_read_status(struct dvb_frontend *fe, enum fe_status *status)
 112 {
 113         struct i2c_client *client = fe->demodulator_priv;
 114         struct si2168_dev *dev = i2c_get_clientdata(client);
 115         struct dtv_frontend_properties *c = &fe->dtv_property_cache;
 116         int ret, i;
 117         unsigned int utmp, utmp1, utmp2;
 118         struct si2168_cmd cmd;
 119
 120         *status = 0;
 121
 122         if (!dev->active) {
 123                 ret = -EAGAIN;
 124                 goto err;
 125         }
 126
 127         switch (c->delivery_system) {
 128         case SYS_DVBT:
 129                 memcpy(cmd.args, "\xa0\x01", 2);
 130                 cmd.wlen = 2;
 131                 cmd.rlen = 13;
 132                 break;
 133         case SYS_DVBC_ANNEX_A:
 134                 memcpy(cmd.args, "\x90\x01", 2);
 135                 cmd.wlen = 2;
 136                 cmd.rlen = 9;
 137                 break;
 138         case SYS_DVBT2:
 139                 memcpy(cmd.args, "\x50\x01", 2);
 140                 cmd.wlen = 2;
 141                 cmd.rlen = 14;
 142                 break;
 143         default:
 144                 ret = -EINVAL;
 145                 goto err;
 146         }
 147
 148         ret = si2168_cmd_execute(client, &cmd);
 149         if (ret)
 150                 goto err;
 151
 152         switch ((cmd.args[2] >> 1) & 0x03) {
 153         case 0x01:
 154                 *status = FE_HAS_SIGNAL | FE_HAS_CARRIER;
 155                 break;
 156         case 0x03:
 157                 *status = FE_HAS_SIGNAL | FE_HAS_CARRIER | FE_HAS_VITERBI |
 158                                 FE_HAS_SYNC | FE_HAS_LOCK;
 159                 break;
 160         }
 161
 162         dev->fe_status = *status;
 163
 164         if (*status & FE_HAS_LOCK) {
 165                 c->cnr.len = 1;
 166                 c->cnr.stat[0].scale = FE_SCALE_DECIBEL;
 167                 c->cnr.stat[0].svalue = cmd.args[3] * 1000 / 4;
 168         } else {
 169                 c->cnr.len = 1;
 170                 c->cnr.stat[0].scale = FE_SCALE_NOT_AVAILABLE;
 171         }
 172
 173         dev_dbg(&client->dev, "status=%02x args=%*ph\n",
 174                         *status, cmd.rlen, cmd.args);
 175
 176         /* BER */
 177         if (*status & FE_HAS_VITERBI) {
 178                 memcpy(cmd.args, "\x82\x00", 2);
 179                 cmd.wlen = 2;
 180                 cmd.rlen = 3;
 181                 ret = si2168_cmd_execute(client, &cmd);
 182                 if (ret)
 183                         goto err;
 184
 185                 /*
 186                  * Firmware returns [0, 255] mantissa and [0, 8] exponent.
 187                  * Convert to DVB API: mantissa * 10^(8 - exponent) / 10^8
 188                  */
 189                 utmp = clamp(8 - cmd.args[1], 0, 8);
 190                 for (i = 0, utmp1 = 1; i < utmp; i++)
 191                         utmp1 = utmp1 * 10;
 192
 193                 utmp1 = cmd.args[2] * utmp1;
 194                 utmp2 = 100000000; /* 10^8 */
 195
 196                 dev_dbg(&client->dev,
 197                         "post_bit_error=%u post_bit_count=%u ber=%u*10^-%u\n",
 198                         utmp1, utmp2, cmd.args[2], cmd.args[1]);
 199
 200                 c->post_bit_error.stat[0].scale = FE_SCALE_COUNTER;
 201                 c->post_bit_error.stat[0].uvalue += utmp1;
 202                 c->post_bit_count.stat[0].scale = FE_SCALE_COUNTER;
 203                 c->post_bit_count.stat[0].uvalue += utmp2;
 204         } else {
 205                 c->post_bit_error.stat[0].scale = FE_SCALE_NOT_AVAILABLE;
 206                 c->post_bit_count.stat[0].scale = FE_SCALE_NOT_AVAILABLE;
 207         }
 208
 209         /* UCB */
 210         if (*status & FE_HAS_SYNC) {
 211                 memcpy(cmd.args, "\x84\x01", 2);
 212                 cmd.wlen = 2;
 213                 cmd.rlen = 3;
 214                 ret = si2168_cmd_execute(client, &cmd);
 215                 if (ret)
 216                         goto err;
 217
 218                 utmp1 = cmd.args[2] << 8 | cmd.args[1] << 0;
 219                 dev_dbg(&client->dev, "block_error=%u\n", utmp1);
 220
 221                 /* Sometimes firmware returns bogus value */
 222                 if (utmp1 == 0xffff)
 223                         utmp1 = 0;
 224
 225                 c->block_error.stat[0].scale = FE_SCALE_COUNTER;
 226                 c->block_error.stat[0].uvalue += utmp1;
 227         } else {
 228                 c->block_error.stat[0].scale = FE_SCALE_NOT_AVAILABLE;
 229         }
 230
 231         return 0;
 232 err:
 233         dev_dbg(&client->dev, "failed=%d\n", ret);
 234         return ret;
 235 }
 236
 237 static int si2168_set_frontend(struct dvb_frontend *fe)
 238 {
 239         struct i2c_client *client = fe->demodulator_priv;
 240         struct si2168_dev *dev = i2c_get_clientdata(client);
 241         struct dtv_frontend_properties *c = &fe->dtv_property_cache;
 242         int ret;
 243         struct si2168_cmd cmd;
 244         u8 bandwidth, delivery_system;
 245
 246         dev_dbg(&client->dev,
 247                         "delivery_system=%u modulation=%u frequency=%u bandwidth_hz=%u symbol_rate=%u inversion=%u stream_id=%u\n",
 248                         c->delivery_system, c->modulation, c->frequency,
 249                         c->bandwidth_hz, c->symbol_rate, c->inversion,
 250                         c->stream_id);
 251
 252         if (!dev->active) {
 253                 ret = -EAGAIN;
 254                 goto err;
 255         }
 256
 257         switch (c->delivery_system) {
 258         case SYS_DVBT:
 259                 delivery_system = 0x20;
 260                 break;
 261         case SYS_DVBC_ANNEX_A:
 262                 delivery_system = 0x30;
 263                 break;
 264         case SYS_DVBT2:
 265                 delivery_system = 0x70;
 266                 break;
 267         default:
 268                 ret = -EINVAL;
 269                 goto err;
 270         }
 271
 272         if (c->bandwidth_hz == 0) {
 273                 ret = -EINVAL;
 274                 goto err;
 275         } else if (c->bandwidth_hz <= 2000000)
 276                 bandwidth = 0x02;
 277         else if (c->bandwidth_hz <= 5000000)
 278                 bandwidth = 0x05;
 279         else if (c->bandwidth_hz <= 6000000)
 280                 bandwidth = 0x06;
 281         else if (c->bandwidth_hz <= 7000000)
 282                 bandwidth = 0x07;
 283         else if (c->bandwidth_hz <= 8000000)
 284                 bandwidth = 0x08;
 285         else if (c->bandwidth_hz <= 9000000)
 286                 bandwidth = 0x09;
 287         else if (c->bandwidth_hz <= 10000000)
 288                 bandwidth = 0x0a;
 289         else
 290                 bandwidth = 0x0f;
 291
 292         /* program tuner */
 293         if (fe->ops.tuner_ops.set_params) {
 294                 ret = fe->ops.tuner_ops.set_params(fe);
 295                 if (ret)
 296                         goto err;
 297         }
 298
 299         memcpy(cmd.args, "\x88\x02\x02\x02\x02", 5);
 300         cmd.wlen = 5;
 301         cmd.rlen = 5;
 302         ret = si2168_cmd_execute(client, &cmd);
 303         if (ret)
 304                 goto err;
 305
 306         /* that has no big effect */
 307         if (c->delivery_system == SYS_DVBT)
 308                 memcpy(cmd.args, "\x89\x21\x06\x11\xff\x98", 6);
 309         else if (c->delivery_system == SYS_DVBC_ANNEX_A)
 310                 memcpy(cmd.args, "\x89\x21\x06\x11\x89\xf0", 6);
 311         else if (c->delivery_system == SYS_DVBT2)
 312                 memcpy(cmd.args, "\x89\x21\x06\x11\x89\x20", 6);
 313         cmd.wlen = 6;
 314         cmd.rlen = 3;
 315         ret = si2168_cmd_execute(client, &cmd);
 316         if (ret)
 317                 goto err;
 318
 319         if (c->delivery_system == SYS_DVBT2) {
 320                 /* select PLP */
 321                 cmd.args[0] = 0x52;
 322                 cmd.args[1] = c->stream_id & 0xff;
 323                 cmd.args[2] = c->stream_id == NO_STREAM_ID_FILTER ? 0 : 1;
 324                 cmd.wlen = 3;
 325                 cmd.rlen = 1;
 326                 ret = si2168_cmd_execute(client, &cmd);
 327                 if (ret)
 328                         goto err;
 329         }
 330
 331         memcpy(cmd.args, "\x51\x03", 2);
 332         cmd.wlen = 2;
 333         cmd.rlen = 12;
 334         ret = si2168_cmd_execute(client, &cmd);
 335         if (ret)
 336                 goto err;
 337
 338         memcpy(cmd.args, "\x12\x08\x04", 3);
 339         cmd.wlen = 3;
 340         cmd.rlen = 3;
 341         ret = si2168_cmd_execute(client, &cmd);
 342         if (ret)
 343                 goto err;
 344
 345         memcpy(cmd.args, "\x14\x00\x0c\x10\x12\x00", 6);
 346         cmd.wlen = 6;
 347         cmd.rlen = 4;
 348         ret = si2168_cmd_execute(client, &cmd);
 349         if (ret)
 350                 goto err;
 351
 352         memcpy(cmd.args, "\x14\x00\x06\x10\x24\x00", 6);
 353         cmd.wlen = 6;
 354         cmd.rlen = 4;
 355         ret = si2168_cmd_execute(client, &cmd);
 356         if (ret)
 357                 goto err;
 358
 359         memcpy(cmd.args, "\x14\x00\x07\x10\x00\x24", 6);
 360         cmd.wlen = 6;
 361         cmd.rlen = 4;
 362         ret = si2168_cmd_execute(client, &cmd);
 363         if (ret)
 364                 goto err;
 365
 366         memcpy(cmd.args, "\x14\x00\x0a\x10\x00\x00", 6);
 367         cmd.args[4] = delivery_system | bandwidth;
 368         if (dev->spectral_inversion)
 369                 cmd.args[5] |= 1;
 370         cmd.wlen = 6;
 371         cmd.rlen = 4;
 372         ret = si2168_cmd_execute(client, &cmd);
 373         if (ret)
 374                 goto err;
 375
 376         /* set DVB-C symbol rate */
 377         if (c->delivery_system == SYS_DVBC_ANNEX_A) {
 378                 memcpy(cmd.args, "\x14\x00\x02\x11", 4);
 379                 cmd.args[4] = ((c->symbol_rate / 1000) >> 0) & 0xff;
 380                 cmd.args[5] = ((c->symbol_rate / 1000) >> 8) & 0xff;
 381                 cmd.wlen = 6;
 382                 cmd.rlen = 4;
 383                 ret = si2168_cmd_execute(client, &cmd);
 384                 if (ret)
 385                         goto err;
 386         }
 387
 388         memcpy(cmd.args, "\x14\x00\x0f\x10\x10\x00", 6);
 389         cmd.wlen = 6;
 390         cmd.rlen = 4;
 391         ret = si2168_cmd_execute(client, &cmd);
 392         if (ret)
 393                 goto err;
 394
 395         memcpy(cmd.args, "\x14\x00\x09\x10\xe3\x08", 6);
 396         cmd.args[5] |= dev->ts_clock_inv ? 0x00 : 0x10;
 397         cmd.wlen = 6;
 398         cmd.rlen = 4;
 399         ret = si2168_cmd_execute(client, &cmd);
 400         if (ret)
 401                 goto err;
 402
 403         memcpy(cmd.args, "\x14\x00\x08\x10\xd7\x05", 6);
 404         cmd.args[5] |= dev->ts_clock_inv ? 0x00 : 0x10;
 405         cmd.wlen = 6;
 406         cmd.rlen = 4;
 407         ret = si2168_cmd_execute(client, &cmd);
 408         if (ret)
 409                 goto err;
 410
 411         memcpy(cmd.args, "\x14\x00\x01\x12\x00\x00", 6);
 412         cmd.wlen = 6;
 413         cmd.rlen = 4;
 414         ret = si2168_cmd_execute(client, &cmd);
 415         if (ret)
 416                 goto err;
 417
 418         memcpy(cmd.args, "\x14\x00\x01\x03\x0c\x00", 6);
 419         cmd.wlen = 6;
 420         cmd.rlen = 4;
 421         ret = si2168_cmd_execute(client, &cmd);
 422         if (ret)
 423                 goto err;
 424
 425         memcpy(cmd.args, "\x85", 1);
 426         cmd.wlen = 1;
 427         cmd.rlen = 1;
 428         ret = si2168_cmd_execute(client, &cmd);
 429         if (ret)
 430                 goto err;
 431
 432         dev->delivery_system = c->delivery_system;
 433
 434         /* enable ts bus */
 435         ret = si2168_ts_bus_ctrl(fe, 1);
 436         if (ret)
 437                 goto err;
 438
 439         return 0;
 440 err:
 441         dev_dbg(&client->dev, "failed=%d\n", ret);
 442         return ret;
 443 }
 444
 445 static int si2168_init(struct dvb_frontend *fe)
 446 {
 447         struct i2c_client *client = fe->demodulator_priv;
 448         struct si2168_dev *dev = i2c_get_clientdata(client);
 449         struct dtv_frontend_properties *c = &fe->dtv_property_cache;
 450         int ret, len, remaining;
 451         const struct firmware *fw;
 452         struct si2168_cmd cmd;
 453
 454         dev_dbg(&client->dev, "\n");
 455
 456         /* initialize */
 457         memcpy(cmd.args, "\xc0\x12\x00\x0c\x00\x0d\x16\x00\x00\x00\x00\x00\x00", 13);
 458         cmd.wlen = 13;
 459         cmd.rlen = 0;
 460         ret = si2168_cmd_execute(client, &cmd);
 461         if (ret)
 462                 goto err;
 463
 464         if (dev->warm) {
 465                 /* resume */
 466                 memcpy(cmd.args, "\xc0\x06\x08\x0f\x00\x20\x21\x01", 8);
 467                 cmd.wlen = 8;
 468                 cmd.rlen = 1;
 469                 ret = si2168_cmd_execute(client, &cmd);
 470                 if (ret)
 471                         goto err;
 472
 473                 udelay(100);
 474                 memcpy(cmd.args, "\x85", 1);
 475                 cmd.wlen = 1;
 476                 cmd.rlen = 1;
 477                 ret = si2168_cmd_execute(client, &cmd);
 478                 if (ret)
 479                         goto err;
 480
 481                 goto warm;
 482         }
 483
 484         /* power up */
 485         memcpy(cmd.args, "\xc0\x06\x01\x0f\x00\x20\x20\x01", 8);
 486         cmd.wlen = 8;
 487         cmd.rlen = 1;
 488         ret = si2168_cmd_execute(client, &cmd);
 489         if (ret)
 490                 goto err;
 491
 492         /* request the firmware, this will block and timeout */
 493         ret = request_firmware(&fw, dev->firmware_name, &client->dev);
 494         if (ret) {
 495                 /* fallback mechanism to handle old name for Si2168 B40 fw */
 496                 if (dev->chip_id == SI2168_CHIP_ID_B40) {
 497                         dev->firmware_name = SI2168_B40_FIRMWARE_FALLBACK;
 498                         ret = request_firmware(&fw, dev->firmware_name,
 499                                                &client->dev);
 500                 }
 501
 502                 if (ret == 0) {
 503                         dev_notice(&client->dev,
 504                                         "please install firmware file '%s'\n",
 505                                         SI2168_B40_FIRMWARE);
 506                 } else {
 507                         dev_err(&client->dev,
 508                                         "firmware file '%s' not found\n",
 509                                         dev->firmware_name);
 510                         goto err_release_firmware;
 511                 }
 512         }
 513
 514         dev_info(&client->dev, "downloading firmware from file '%s'\n",
 515                         dev->firmware_name);
 516
 517         if ((fw->size % 17 == 0) && (fw->data[0] > 5)) {
 518                 /* firmware is in the new format */
 519                 for (remaining = fw->size; remaining > 0; remaining -= 17) {
 520                         len = fw->data[fw->size - remaining];
 521                         if (len > SI2168_ARGLEN) {
 522                                 ret = -EINVAL;
 523                                 break;
 524                         }
 525                         memcpy(cmd.args, &fw->data[(fw->size - remaining) + 1], len);
 526                         cmd.wlen = len;
 527                         cmd.rlen = 1;
 528                         ret = si2168_cmd_execute(client, &cmd);
 529                         if (ret)
 530                                 break;
 531                 }
 532         } else if (fw->size % 8 == 0) {
 533                 /* firmware is in the old format */
 534                 for (remaining = fw->size; remaining > 0; remaining -= 8) {
 535                         len = 8;
 536                         memcpy(cmd.args, &fw->data[fw->size - remaining], len);
 537                         cmd.wlen = len;
 538                         cmd.rlen = 1;
 539                         ret = si2168_cmd_execute(client, &cmd);
 540                         if (ret)
 541                                 break;
 542                 }
 543         } else {
 544                 /* bad or unknown firmware format */
 545                 ret = -EINVAL;
 546         }
 547
 548         if (ret) {
 549                 dev_err(&client->dev, "firmware download failed %d\n", ret);
 550                 goto err_release_firmware;
 551         }
 552
 553         release_firmware(fw);
 554
 555         memcpy(cmd.args, "\x01\x01", 2);
 556         cmd.wlen = 2;
 557         cmd.rlen = 1;
 558         ret = si2168_cmd_execute(client, &cmd);
 559         if (ret)
 560                 goto err;
 561
 562         /* query firmware version */
 563         memcpy(cmd.args, "\x11", 1);
 564         cmd.wlen = 1;
 565         cmd.rlen = 10;
 566         ret = si2168_cmd_execute(client, &cmd);
 567         if (ret)
 568                 goto err;
 569
 570         dev->version = (cmd.args[9] + '@') << 24 | (cmd.args[6] - '0') << 16 |
 571                        (cmd.args[7] - '0') << 8 | (cmd.args[8]) << 0;
 572         dev_info(&client->dev, "firmware version: %c %d.%d.%d\n",
 573                  dev->version >> 24 & 0xff, dev->version >> 16 & 0xff,
 574                  dev->version >> 8 & 0xff, dev->version >> 0 & 0xff);
 575
 576         /* set ts mode */
 577         ret = si2168_ts_bus_ctrl(fe, 1);
 578         if (ret)
 579                 goto err;
 580
 581         dev->warm = true;
 582 warm:
 583         /* Init stats here to indicate which stats are supported */
 584         c->cnr.len = 1;
 585         c->cnr.stat[0].scale = FE_SCALE_NOT_AVAILABLE;
 586         c->post_bit_error.len = 1;
 587         c->post_bit_error.stat[0].scale = FE_SCALE_NOT_AVAILABLE;
 588         c->post_bit_count.len = 1;
 589         c->post_bit_count.stat[0].scale = FE_SCALE_NOT_AVAILABLE;
 590         c->block_error.len = 1;
 591         c->block_error.stat[0].scale = FE_SCALE_NOT_AVAILABLE;
 592
 593         dev->active = true;
 594
 595         return 0;
 596 err_release_firmware:
 597         release_firmware(fw);
 598 err:
 599         dev_dbg(&client->dev, "failed=%d\n", ret);
 600         return ret;
 601 }
 602
 603 static int si2168_sleep(struct dvb_frontend *fe)
 604 {
 605         struct i2c_client *client = fe->demodulator_priv;
 606         struct si2168_dev *dev = i2c_get_clientdata(client);
 607         int ret;
 608         struct si2168_cmd cmd;
 609
 610         dev_dbg(&client->dev, "\n");
 611
 612         dev->active = false;
 613
 614         /* tri-state data bus */
 615         ret = si2168_ts_bus_ctrl(fe, 0);
 616         if (ret)
 617                 goto err;
 618
 619         /* Firmware later than B 4.0-11 loses warm state during sleep */
 620         if (dev->version > ('B' << 24 | 4 << 16 | 0 << 8 | 11 << 0))
 621                 dev->warm = false;
 622
 623         memcpy(cmd.args, "\x13", 1);
 624         cmd.wlen = 1;
 625         cmd.rlen = 0;
 626         ret = si2168_cmd_execute(client, &cmd);
 627         if (ret)
 628                 goto err;
 629
 630         return 0;
 631 err:
 632         dev_dbg(&client->dev, "failed=%d\n", ret);
 633         return ret;
 634 }
 635
 636 static int si2168_get_tune_settings(struct dvb_frontend *fe,
 637         struct dvb_frontend_tune_settings *s)
 638 {
 639         s->min_delay_ms = 900;
 640
 641         return 0;
 642 }
 643
 644 static int si2168_select(struct i2c_mux_core *muxc, u32 chan)
 645 {
 646         struct i2c_client *client = i2c_mux_priv(muxc);
 647         int ret;
 648         struct si2168_cmd cmd;
 649
 650         /* open I2C gate */
 651         memcpy(cmd.args, "\xc0\x0d\x01", 3);
 652         cmd.wlen = 3;
 653         cmd.rlen = 0;
 654         ret = si2168_cmd_execute(client, &cmd);
 655         if (ret)
 656                 goto err;
 657
 658         return 0;
 659 err:
 660         dev_dbg(&client->dev, "failed=%d\n", ret);
 661         return ret;
 662 }
 663
 664 static int si2168_deselect(struct i2c_mux_core *muxc, u32 chan)
 665 {
 666         struct i2c_client *client = i2c_mux_priv(muxc);
 667         int ret;
 668         struct si2168_cmd cmd;
 669
 670         /* close I2C gate */
 671         memcpy(cmd.args, "\xc0\x0d\x00", 3);
 672         cmd.wlen = 3;
 673         cmd.rlen = 0;
 674         ret = si2168_cmd_execute(client, &cmd);
 675         if (ret)
 676                 goto err;
 677
 678         return 0;
 679 err:
 680         dev_dbg(&client->dev, "failed=%d\n", ret);
 681         return ret;
 682 }
 683
 684 static const struct dvb_frontend_ops si2168_ops = {
 685         .delsys = {SYS_DVBT, SYS_DVBT2, SYS_DVBC_ANNEX_A},
 686         .info = {
 687                 .name = "Silicon Labs Si2168",
 688                 .frequency_min_hz      =  48 * MHz,
 689                 .frequency_max_hz      = 870 * MHz,
 690                 .frequency_stepsize_hz = 62500,
 691                 .symbol_rate_min       = 1000000,
 692                 .symbol_rate_max       = 7200000,
 693                 .caps = FE_CAN_FEC_1_2 |
 694                         FE_CAN_FEC_2_3 |
 695                         FE_CAN_FEC_3_4 |
 696                         FE_CAN_FEC_5_6 |
 697                         FE_CAN_FEC_7_8 |
 698                         FE_CAN_FEC_AUTO |
 699                         FE_CAN_QPSK |
 700                         FE_CAN_QAM_16 |
 701                         FE_CAN_QAM_32 |
 702                         FE_CAN_QAM_64 |
 703                         FE_CAN_QAM_128 |
 704                         FE_CAN_QAM_256 |
 705                         FE_CAN_QAM_AUTO |
 706                         FE_CAN_TRANSMISSION_MODE_AUTO |
 707                         FE_CAN_GUARD_INTERVAL_AUTO |
 708                         FE_CAN_HIERARCHY_AUTO |
 709                         FE_CAN_MUTE_TS |
 710                         FE_CAN_2G_MODULATION |
 711                         FE_CAN_MULTISTREAM
 712         },
 713
 714         .get_tune_settings = si2168_get_tune_settings,
 715
 716         .init = si2168_init,
 717         .sleep = si2168_sleep,
 718
 719         .set_frontend = si2168_set_frontend,
 720
 721         .read_status = si2168_read_status,
 722 };
 723
 724 static int si2168_probe(struct i2c_client *client,
 725                 const struct i2c_device_id *id)
 726 {
 727         struct si2168_config *config = client->dev.platform_data;
 728         struct si2168_dev *dev;
 729         int ret;
 730         struct si2168_cmd cmd;
 731
 732         dev_dbg(&client->dev, "\n");
 733
 734         dev = kzalloc(sizeof(*dev), GFP_KERNEL);
 735         if (!dev) {
 736                 ret = -ENOMEM;
 737                 goto err;
 738         }
 739
 740         i2c_set_clientdata(client, dev);
 741         mutex_init(&dev->i2c_mutex);
 742
 743         /* Initialize */
 744         memcpy(cmd.args, "\xc0\x12\x00\x0c\x00\x0d\x16\x00\x00\x00\x00\x00\x00", 13);
 745         cmd.wlen = 13;
 746         cmd.rlen = 0;
 747         ret = si2168_cmd_execute(client, &cmd);
 748         if (ret)
 749                 goto err_kfree;
 750
 751         /* Power up */
 752         memcpy(cmd.args, "\xc0\x06\x01\x0f\x00\x20\x20\x01", 8);
 753         cmd.wlen = 8;
 754         cmd.rlen = 1;
 755         ret = si2168_cmd_execute(client, &cmd);
 756         if (ret)
 757                 goto err_kfree;
 758
 759         /* Query chip revision */
 760         memcpy(cmd.args, "\x02", 1);
 761         cmd.wlen = 1;
 762         cmd.rlen = 13;
 763         ret = si2168_cmd_execute(client, &cmd);
 764         if (ret)
 765                 goto err_kfree;
 766
 767         dev->chip_id = cmd.args[1] << 24 | cmd.args[2] << 16 |
 768                        cmd.args[3] << 8 | cmd.args[4] << 0;
 769
 770         switch (dev->chip_id) {
 771         case SI2168_CHIP_ID_A20:
 772                 dev->firmware_name = SI2168_A20_FIRMWARE;
 773                 break;
 774         case SI2168_CHIP_ID_A30:
 775                 dev->firmware_name = SI2168_A30_FIRMWARE;
 776                 break;
 777         case SI2168_CHIP_ID_B40:
 778                 dev->firmware_name = SI2168_B40_FIRMWARE;
 779                 break;
 780         case SI2168_CHIP_ID_D60:
 781                 dev->firmware_name = SI2168_D60_FIRMWARE;
 782                 break;
 783         default:
 784                 dev_dbg(&client->dev, "unknown chip version Si21%d-%c%c%c\n",
 785                         cmd.args[2], cmd.args[1], cmd.args[3], cmd.args[4]);
 786                 ret = -ENODEV;
 787                 goto err_kfree;
 788         }
 789
 790         dev->version = (cmd.args[1]) << 24 | (cmd.args[3] - '0') << 16 |
 791                        (cmd.args[4] - '0') << 8 | (cmd.args[5]) << 0;
 792
 793         /* create mux i2c adapter for tuner */
 794         dev->muxc = i2c_mux_alloc(client->adapter, &client->dev,
 795                                   1, 0, I2C_MUX_LOCKED,
 796                                   si2168_select, si2168_deselect);
 797         if (!dev->muxc) {
 798                 ret = -ENOMEM;
 799                 goto err_kfree;
 800         }
 801         dev->muxc->priv = client;
 802         ret = i2c_mux_add_adapter(dev->muxc, 0, 0, 0);
 803         if (ret)
 804                 goto err_kfree;
 805
 806         /* create dvb_frontend */
 807         memcpy(&dev->fe.ops, &si2168_ops, sizeof(struct dvb_frontend_ops));
 808         dev->fe.demodulator_priv = client;
 809         *config->i2c_adapter = dev->muxc->adapter[0];
 810         *config->fe = &dev->fe;
 811         dev->ts_mode = config->ts_mode;
 812         dev->ts_clock_inv = config->ts_clock_inv;
 813         dev->ts_clock_gapped = config->ts_clock_gapped;
 814         dev->spectral_inversion = config->spectral_inversion;
 815
 816         dev_info(&client->dev, "Silicon Labs Si2168-%c%d%d successfully identified\n",
 817                  dev->version >> 24 & 0xff, dev->version >> 16 & 0xff,
 818                  dev->version >> 8 & 0xff);
 819         dev_info(&client->dev, "firmware version: %c %d.%d.%d\n",
 820                  dev->version >> 24 & 0xff, dev->version >> 16 & 0xff,
 821                  dev->version >> 8 & 0xff, dev->version >> 0 & 0xff);
 822
 823         return 0;
 824 err_kfree:
 825         kfree(dev);
 826 err:
 827         dev_warn(&client->dev, "probe failed = %d\n", ret);
 828         return ret;
 829 }
 830
 831 static int si2168_remove(struct i2c_client *client)
 832 {
 833         struct si2168_dev *dev = i2c_get_clientdata(client);
 834
 835         dev_dbg(&client->dev, "\n");
 836
 837         i2c_mux_del_adapters(dev->muxc);
 838
 839         dev->fe.ops.release = NULL;
 840         dev->fe.demodulator_priv = NULL;
 841
 842         kfree(dev);
 843
 844         return 0;
 845 }
 846
 847 static const struct i2c_device_id si2168_id_table[] = {
 848         {"si2168", 0},
 849         {}
 850 };
 851 MODULE_DEVICE_TABLE(i2c, si2168_id_table);
 852
 853 static struct i2c_driver si2168_driver = {
 854         .driver = {
 855                 .name                = "si2168",
 856                 .suppress_bind_attrs = true,
 857         },
 858         .probe          = si2168_probe,
 859         .remove         = si2168_remove,
 860         .id_table       = si2168_id_table,
 861 };
 862
 863 module_i2c_driver(si2168_driver);
 864
 865 MODULE_AUTHOR("Antti Palosaari <crope@iki.fi>");
 866 MODULE_DESCRIPTION("Silicon Labs Si2168 DVB-T/T2/C demodulator driver");
 867 MODULE_LICENSE("GPL");
 868 MODULE_FIRMWARE(SI2168_A20_FIRMWARE);
 869 MODULE_FIRMWARE(SI2168_A30_FIRMWARE);
 870 MODULE_FIRMWARE(SI2168_B40_FIRMWARE);
 871 MODULE_FIRMWARE(SI2168_D60_FIRMWARE);