1 /* 2 * Silicon Labs Si2168 DVB-T/T2/C demodulator driver 3 * 4 * Copyright (C) 2014 Antti Palosaari <crope@iki.fi> 5 * 6 * This program is free software; you can redistribute it and/or modify 7 * it under the terms of the GNU General Public License as published by 8 * the Free Software Foundation; either version 2 of the License, or 9 * (at your option) any later version. 10 * 11 * This program is distributed in the hope that it will be useful, 12 * but WITHOUT ANY WARRANTY; without even the implied warranty of 13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 14 * GNU General Public License for more details. 15 */ 16 17 #include "si2168_priv.h" 18 19 static const struct dvb_frontend_ops si2168_ops; 20 21 /* execute firmware command */ 22 static int si2168_cmd_execute(struct i2c_client *client, struct si2168_cmd *cmd) 23 { 24 struct si2168_dev *dev = i2c_get_clientdata(client); 25 int ret; 26 unsigned long timeout; 27 28 mutex_lock(&dev->i2c_mutex); 29 30 if (cmd->wlen) { 31 /* write cmd and args for firmware */ 32 ret = i2c_master_send(client, cmd->args, cmd->wlen); 33 if (ret < 0) { 34 goto err_mutex_unlock; 35 } else if (ret != cmd->wlen) { 36 ret = -EREMOTEIO; 37 goto err_mutex_unlock; 38 } 39 } 40 41 if (cmd->rlen) { 42 /* wait cmd execution terminate */ 43 #define TIMEOUT 70 44 timeout = jiffies + msecs_to_jiffies(TIMEOUT); 45 while (!time_after(jiffies, timeout)) { 46 ret = i2c_master_recv(client, cmd->args, cmd->rlen); 47 if (ret < 0) { 48 goto err_mutex_unlock; 49 } else if (ret != cmd->rlen) { 50 ret = -EREMOTEIO; 51 goto err_mutex_unlock; 52 } 53 54 /* firmware ready? */ 55 if ((cmd->args[0] >> 7) & 0x01) 56 break; 57 } 58 59 dev_dbg(&client->dev, "cmd execution took %d ms\n", 60 jiffies_to_msecs(jiffies) - 61 (jiffies_to_msecs(timeout) - TIMEOUT)); 62 63 if (!((cmd->args[0] >> 7) & 0x01)) { 64 ret = -ETIMEDOUT; 65 goto err_mutex_unlock; 66 } 67 } 68 69 mutex_unlock(&dev->i2c_mutex); 70 return 0; 71 72 err_mutex_unlock: 73 mutex_unlock(&dev->i2c_mutex); 74 dev_dbg(&client->dev, "failed=%d\n", ret); 75 return ret; 76 } 77 78 static int si2168_read_status(struct dvb_frontend *fe, fe_status_t *status) 79 { 80 struct i2c_client *client = fe->demodulator_priv; 81 struct si2168_dev *dev = i2c_get_clientdata(client); 82 struct dtv_frontend_properties *c = &fe->dtv_property_cache; 83 int ret; 84 struct si2168_cmd cmd; 85 86 *status = 0; 87 88 if (!dev->active) { 89 ret = -EAGAIN; 90 goto err; 91 } 92 93 switch (c->delivery_system) { 94 case SYS_DVBT: 95 memcpy(cmd.args, "\xa0\x01", 2); 96 cmd.wlen = 2; 97 cmd.rlen = 13; 98 break; 99 case SYS_DVBC_ANNEX_A: 100 memcpy(cmd.args, "\x90\x01", 2); 101 cmd.wlen = 2; 102 cmd.rlen = 9; 103 break; 104 case SYS_DVBT2: 105 memcpy(cmd.args, "\x50\x01", 2); 106 cmd.wlen = 2; 107 cmd.rlen = 14; 108 break; 109 default: 110 ret = -EINVAL; 111 goto err; 112 } 113 114 ret = si2168_cmd_execute(client, &cmd); 115 if (ret) 116 goto err; 117 118 switch ((cmd.args[2] >> 1) & 0x03) { 119 case 0x01: 120 *status = FE_HAS_SIGNAL | FE_HAS_CARRIER; 121 break; 122 case 0x03: 123 *status = FE_HAS_SIGNAL | FE_HAS_CARRIER | FE_HAS_VITERBI | 124 FE_HAS_SYNC | FE_HAS_LOCK; 125 break; 126 } 127 128 dev->fe_status = *status; 129 130 if (*status & FE_HAS_LOCK) { 131 c->cnr.len = 1; 132 c->cnr.stat[0].scale = FE_SCALE_DECIBEL; 133 c->cnr.stat[0].svalue = cmd.args[3] * 1000 / 4; 134 } else { 135 c->cnr.len = 1; 136 c->cnr.stat[0].scale = FE_SCALE_NOT_AVAILABLE; 137 } 138 139 dev_dbg(&client->dev, "status=%02x args=%*ph\n", 140 *status, cmd.rlen, cmd.args); 141 142 return 0; 143 err: 144 dev_dbg(&client->dev, "failed=%d\n", ret); 145 return ret; 146 } 147 148 static int si2168_set_frontend(struct dvb_frontend *fe) 149 { 150 struct i2c_client *client = fe->demodulator_priv; 151 struct si2168_dev *dev = i2c_get_clientdata(client); 152 struct dtv_frontend_properties *c = &fe->dtv_property_cache; 153 int ret; 154 struct si2168_cmd cmd; 155 u8 bandwidth, delivery_system; 156 157 dev_dbg(&client->dev, 158 "delivery_system=%u modulation=%u frequency=%u bandwidth_hz=%u symbol_rate=%u inversion=%u stream_id=%u\n", 159 c->delivery_system, c->modulation, c->frequency, 160 c->bandwidth_hz, c->symbol_rate, c->inversion, 161 c->stream_id); 162 163 if (!dev->active) { 164 ret = -EAGAIN; 165 goto err; 166 } 167 168 switch (c->delivery_system) { 169 case SYS_DVBT: 170 delivery_system = 0x20; 171 break; 172 case SYS_DVBC_ANNEX_A: 173 delivery_system = 0x30; 174 break; 175 case SYS_DVBT2: 176 delivery_system = 0x70; 177 break; 178 default: 179 ret = -EINVAL; 180 goto err; 181 } 182 183 if (c->bandwidth_hz == 0) { 184 ret = -EINVAL; 185 goto err; 186 } else if (c->bandwidth_hz <= 2000000) 187 bandwidth = 0x02; 188 else if (c->bandwidth_hz <= 5000000) 189 bandwidth = 0x05; 190 else if (c->bandwidth_hz <= 6000000) 191 bandwidth = 0x06; 192 else if (c->bandwidth_hz <= 7000000) 193 bandwidth = 0x07; 194 else if (c->bandwidth_hz <= 8000000) 195 bandwidth = 0x08; 196 else if (c->bandwidth_hz <= 9000000) 197 bandwidth = 0x09; 198 else if (c->bandwidth_hz <= 10000000) 199 bandwidth = 0x0a; 200 else 201 bandwidth = 0x0f; 202 203 /* program tuner */ 204 if (fe->ops.tuner_ops.set_params) { 205 ret = fe->ops.tuner_ops.set_params(fe); 206 if (ret) 207 goto err; 208 } 209 210 memcpy(cmd.args, "\x88\x02\x02\x02\x02", 5); 211 cmd.wlen = 5; 212 cmd.rlen = 5; 213 ret = si2168_cmd_execute(client, &cmd); 214 if (ret) 215 goto err; 216 217 /* that has no big effect */ 218 if (c->delivery_system == SYS_DVBT) 219 memcpy(cmd.args, "\x89\x21\x06\x11\xff\x98", 6); 220 else if (c->delivery_system == SYS_DVBC_ANNEX_A) 221 memcpy(cmd.args, "\x89\x21\x06\x11\x89\xf0", 6); 222 else if (c->delivery_system == SYS_DVBT2) 223 memcpy(cmd.args, "\x89\x21\x06\x11\x89\x20", 6); 224 cmd.wlen = 6; 225 cmd.rlen = 3; 226 ret = si2168_cmd_execute(client, &cmd); 227 if (ret) 228 goto err; 229 230 if (c->delivery_system == SYS_DVBT2) { 231 /* select PLP */ 232 cmd.args[0] = 0x52; 233 cmd.args[1] = c->stream_id & 0xff; 234 cmd.args[2] = c->stream_id == NO_STREAM_ID_FILTER ? 0 : 1; 235 cmd.wlen = 3; 236 cmd.rlen = 1; 237 ret = si2168_cmd_execute(client, &cmd); 238 if (ret) 239 goto err; 240 } 241 242 memcpy(cmd.args, "\x51\x03", 2); 243 cmd.wlen = 2; 244 cmd.rlen = 12; 245 ret = si2168_cmd_execute(client, &cmd); 246 if (ret) 247 goto err; 248 249 memcpy(cmd.args, "\x12\x08\x04", 3); 250 cmd.wlen = 3; 251 cmd.rlen = 3; 252 ret = si2168_cmd_execute(client, &cmd); 253 if (ret) 254 goto err; 255 256 memcpy(cmd.args, "\x14\x00\x0c\x10\x12\x00", 6); 257 cmd.wlen = 6; 258 cmd.rlen = 4; 259 ret = si2168_cmd_execute(client, &cmd); 260 if (ret) 261 goto err; 262 263 memcpy(cmd.args, "\x14\x00\x06\x10\x24\x00", 6); 264 cmd.wlen = 6; 265 cmd.rlen = 4; 266 ret = si2168_cmd_execute(client, &cmd); 267 if (ret) 268 goto err; 269 270 memcpy(cmd.args, "\x14\x00\x07\x10\x00\x24", 6); 271 cmd.wlen = 6; 272 cmd.rlen = 4; 273 ret = si2168_cmd_execute(client, &cmd); 274 if (ret) 275 goto err; 276 277 memcpy(cmd.args, "\x14\x00\x0a\x10\x00\x00", 6); 278 cmd.args[4] = delivery_system | bandwidth; 279 cmd.wlen = 6; 280 cmd.rlen = 4; 281 ret = si2168_cmd_execute(client, &cmd); 282 if (ret) 283 goto err; 284 285 /* set DVB-C symbol rate */ 286 if (c->delivery_system == SYS_DVBC_ANNEX_A) { 287 memcpy(cmd.args, "\x14\x00\x02\x11", 4); 288 cmd.args[4] = ((c->symbol_rate / 1000) >> 0) & 0xff; 289 cmd.args[5] = ((c->symbol_rate / 1000) >> 8) & 0xff; 290 cmd.wlen = 6; 291 cmd.rlen = 4; 292 ret = si2168_cmd_execute(client, &cmd); 293 if (ret) 294 goto err; 295 } 296 297 memcpy(cmd.args, "\x14\x00\x0f\x10\x10\x00", 6); 298 cmd.wlen = 6; 299 cmd.rlen = 4; 300 ret = si2168_cmd_execute(client, &cmd); 301 if (ret) 302 goto err; 303 304 memcpy(cmd.args, "\x14\x00\x09\x10\xe3\x08", 6); 305 cmd.args[5] |= dev->ts_clock_inv ? 0x00 : 0x10; 306 cmd.wlen = 6; 307 cmd.rlen = 4; 308 ret = si2168_cmd_execute(client, &cmd); 309 if (ret) 310 goto err; 311 312 memcpy(cmd.args, "\x14\x00\x08\x10\xd7\x05", 6); 313 cmd.args[5] |= dev->ts_clock_inv ? 0x00 : 0x10; 314 cmd.wlen = 6; 315 cmd.rlen = 4; 316 ret = si2168_cmd_execute(client, &cmd); 317 if (ret) 318 goto err; 319 320 memcpy(cmd.args, "\x14\x00\x01\x12\x00\x00", 6); 321 cmd.wlen = 6; 322 cmd.rlen = 4; 323 ret = si2168_cmd_execute(client, &cmd); 324 if (ret) 325 goto err; 326 327 memcpy(cmd.args, "\x14\x00\x01\x03\x0c\x00", 6); 328 cmd.wlen = 6; 329 cmd.rlen = 4; 330 ret = si2168_cmd_execute(client, &cmd); 331 if (ret) 332 goto err; 333 334 memcpy(cmd.args, "\x85", 1); 335 cmd.wlen = 1; 336 cmd.rlen = 1; 337 ret = si2168_cmd_execute(client, &cmd); 338 if (ret) 339 goto err; 340 341 dev->delivery_system = c->delivery_system; 342 343 return 0; 344 err: 345 dev_dbg(&client->dev, "failed=%d\n", ret); 346 return ret; 347 } 348 349 static int si2168_init(struct dvb_frontend *fe) 350 { 351 struct i2c_client *client = fe->demodulator_priv; 352 struct si2168_dev *dev = i2c_get_clientdata(client); 353 int ret, len, remaining; 354 const struct firmware *fw; 355 const char *fw_name; 356 struct si2168_cmd cmd; 357 unsigned int chip_id; 358 359 dev_dbg(&client->dev, "\n"); 360 361 /* initialize */ 362 memcpy(cmd.args, "\xc0\x12\x00\x0c\x00\x0d\x16\x00\x00\x00\x00\x00\x00", 13); 363 cmd.wlen = 13; 364 cmd.rlen = 0; 365 ret = si2168_cmd_execute(client, &cmd); 366 if (ret) 367 goto err; 368 369 if (dev->fw_loaded) { 370 /* resume */ 371 memcpy(cmd.args, "\xc0\x06\x08\x0f\x00\x20\x21\x01", 8); 372 cmd.wlen = 8; 373 cmd.rlen = 1; 374 ret = si2168_cmd_execute(client, &cmd); 375 if (ret) 376 goto err; 377 378 memcpy(cmd.args, "\x85", 1); 379 cmd.wlen = 1; 380 cmd.rlen = 1; 381 ret = si2168_cmd_execute(client, &cmd); 382 if (ret) 383 goto err; 384 385 goto warm; 386 } 387 388 /* power up */ 389 memcpy(cmd.args, "\xc0\x06\x01\x0f\x00\x20\x20\x01", 8); 390 cmd.wlen = 8; 391 cmd.rlen = 1; 392 ret = si2168_cmd_execute(client, &cmd); 393 if (ret) 394 goto err; 395 396 /* query chip revision */ 397 memcpy(cmd.args, "\x02", 1); 398 cmd.wlen = 1; 399 cmd.rlen = 13; 400 ret = si2168_cmd_execute(client, &cmd); 401 if (ret) 402 goto err; 403 404 chip_id = cmd.args[1] << 24 | cmd.args[2] << 16 | cmd.args[3] << 8 | 405 cmd.args[4] << 0; 406 407 #define SI2168_A20 ('A' << 24 | 68 << 16 | '2' << 8 | '0' << 0) 408 #define SI2168_A30 ('A' << 24 | 68 << 16 | '3' << 8 | '0' << 0) 409 #define SI2168_B40 ('B' << 24 | 68 << 16 | '4' << 8 | '0' << 0) 410 411 switch (chip_id) { 412 case SI2168_A20: 413 fw_name = SI2168_A20_FIRMWARE; 414 break; 415 case SI2168_A30: 416 fw_name = SI2168_A30_FIRMWARE; 417 break; 418 case SI2168_B40: 419 fw_name = SI2168_B40_FIRMWARE; 420 break; 421 default: 422 dev_err(&client->dev, "unknown chip version Si21%d-%c%c%c\n", 423 cmd.args[2], cmd.args[1], 424 cmd.args[3], cmd.args[4]); 425 ret = -EINVAL; 426 goto err; 427 } 428 429 dev_info(&client->dev, "found a 'Silicon Labs Si21%d-%c%c%c'\n", 430 cmd.args[2], cmd.args[1], cmd.args[3], cmd.args[4]); 431 432 /* request the firmware, this will block and timeout */ 433 ret = request_firmware(&fw, fw_name, &client->dev); 434 if (ret) { 435 /* fallback mechanism to handle old name for Si2168 B40 fw */ 436 if (chip_id == SI2168_B40) { 437 fw_name = SI2168_B40_FIRMWARE_FALLBACK; 438 ret = request_firmware(&fw, fw_name, &client->dev); 439 } 440 441 if (ret == 0) { 442 dev_notice(&client->dev, 443 "please install firmware file '%s'\n", 444 SI2168_B40_FIRMWARE); 445 } else { 446 dev_err(&client->dev, 447 "firmware file '%s' not found\n", 448 fw_name); 449 goto err_release_firmware; 450 } 451 } 452 453 dev_info(&client->dev, "downloading firmware from file '%s'\n", 454 fw_name); 455 456 if ((fw->size % 17 == 0) && (fw->data[0] > 5)) { 457 /* firmware is in the new format */ 458 for (remaining = fw->size; remaining > 0; remaining -= 17) { 459 len = fw->data[fw->size - remaining]; 460 memcpy(cmd.args, &fw->data[(fw->size - remaining) + 1], len); 461 cmd.wlen = len; 462 cmd.rlen = 1; 463 ret = si2168_cmd_execute(client, &cmd); 464 if (ret) 465 break; 466 } 467 } else if (fw->size % 8 == 0) { 468 /* firmware is in the old format */ 469 for (remaining = fw->size; remaining > 0; remaining -= 8) { 470 len = 8; 471 memcpy(cmd.args, &fw->data[fw->size - remaining], len); 472 cmd.wlen = len; 473 cmd.rlen = 1; 474 ret = si2168_cmd_execute(client, &cmd); 475 if (ret) 476 break; 477 } 478 } else { 479 /* bad or unknown firmware format */ 480 ret = -EINVAL; 481 } 482 483 if (ret) { 484 dev_err(&client->dev, "firmware download failed %d\n", ret); 485 goto err_release_firmware; 486 } 487 488 release_firmware(fw); 489 490 memcpy(cmd.args, "\x01\x01", 2); 491 cmd.wlen = 2; 492 cmd.rlen = 1; 493 ret = si2168_cmd_execute(client, &cmd); 494 if (ret) 495 goto err; 496 497 /* query firmware version */ 498 memcpy(cmd.args, "\x11", 1); 499 cmd.wlen = 1; 500 cmd.rlen = 10; 501 ret = si2168_cmd_execute(client, &cmd); 502 if (ret) 503 goto err; 504 505 dev_info(&client->dev, "firmware version: %c.%c.%d\n", 506 cmd.args[6], cmd.args[7], cmd.args[8]); 507 508 /* set ts mode */ 509 memcpy(cmd.args, "\x14\x00\x01\x10\x10\x00", 6); 510 cmd.args[4] |= dev->ts_mode; 511 cmd.wlen = 6; 512 cmd.rlen = 4; 513 ret = si2168_cmd_execute(client, &cmd); 514 if (ret) 515 goto err; 516 517 dev->fw_loaded = true; 518 warm: 519 dev->active = true; 520 521 return 0; 522 523 err_release_firmware: 524 release_firmware(fw); 525 err: 526 dev_dbg(&client->dev, "failed=%d\n", ret); 527 return ret; 528 } 529 530 static int si2168_sleep(struct dvb_frontend *fe) 531 { 532 struct i2c_client *client = fe->demodulator_priv; 533 struct si2168_dev *dev = i2c_get_clientdata(client); 534 int ret; 535 struct si2168_cmd cmd; 536 537 dev_dbg(&client->dev, "\n"); 538 539 dev->active = false; 540 541 memcpy(cmd.args, "\x13", 1); 542 cmd.wlen = 1; 543 cmd.rlen = 0; 544 ret = si2168_cmd_execute(client, &cmd); 545 if (ret) 546 goto err; 547 548 return 0; 549 err: 550 dev_dbg(&client->dev, "failed=%d\n", ret); 551 return ret; 552 } 553 554 static int si2168_get_tune_settings(struct dvb_frontend *fe, 555 struct dvb_frontend_tune_settings *s) 556 { 557 s->min_delay_ms = 900; 558 559 return 0; 560 } 561 562 /* 563 * I2C gate logic 564 * We must use unlocked i2c_transfer() here because I2C lock is already taken 565 * by tuner driver. 566 */ 567 static int si2168_select(struct i2c_adapter *adap, void *mux_priv, u32 chan) 568 { 569 struct i2c_client *client = mux_priv; 570 struct si2168_dev *dev = i2c_get_clientdata(client); 571 int ret; 572 struct i2c_msg gate_open_msg = { 573 .addr = client->addr, 574 .flags = 0, 575 .len = 3, 576 .buf = "\xc0\x0d\x01", 577 }; 578 579 mutex_lock(&dev->i2c_mutex); 580 581 /* open tuner I2C gate */ 582 ret = __i2c_transfer(client->adapter, &gate_open_msg, 1); 583 if (ret != 1) { 584 dev_warn(&client->dev, "i2c write failed=%d\n", ret); 585 if (ret >= 0) 586 ret = -EREMOTEIO; 587 } else { 588 ret = 0; 589 } 590 591 return ret; 592 } 593 594 static int si2168_deselect(struct i2c_adapter *adap, void *mux_priv, u32 chan) 595 { 596 struct i2c_client *client = mux_priv; 597 struct si2168_dev *dev = i2c_get_clientdata(client); 598 int ret; 599 struct i2c_msg gate_close_msg = { 600 .addr = client->addr, 601 .flags = 0, 602 .len = 3, 603 .buf = "\xc0\x0d\x00", 604 }; 605 606 /* close tuner I2C gate */ 607 ret = __i2c_transfer(client->adapter, &gate_close_msg, 1); 608 if (ret != 1) { 609 dev_warn(&client->dev, "i2c write failed=%d\n", ret); 610 if (ret >= 0) 611 ret = -EREMOTEIO; 612 } else { 613 ret = 0; 614 } 615 616 mutex_unlock(&dev->i2c_mutex); 617 618 return ret; 619 } 620 621 static const struct dvb_frontend_ops si2168_ops = { 622 .delsys = {SYS_DVBT, SYS_DVBT2, SYS_DVBC_ANNEX_A}, 623 .info = { 624 .name = "Silicon Labs Si2168", 625 .symbol_rate_min = 1000000, 626 .symbol_rate_max = 7200000, 627 .caps = FE_CAN_FEC_1_2 | 628 FE_CAN_FEC_2_3 | 629 FE_CAN_FEC_3_4 | 630 FE_CAN_FEC_5_6 | 631 FE_CAN_FEC_7_8 | 632 FE_CAN_FEC_AUTO | 633 FE_CAN_QPSK | 634 FE_CAN_QAM_16 | 635 FE_CAN_QAM_32 | 636 FE_CAN_QAM_64 | 637 FE_CAN_QAM_128 | 638 FE_CAN_QAM_256 | 639 FE_CAN_QAM_AUTO | 640 FE_CAN_TRANSMISSION_MODE_AUTO | 641 FE_CAN_GUARD_INTERVAL_AUTO | 642 FE_CAN_HIERARCHY_AUTO | 643 FE_CAN_MUTE_TS | 644 FE_CAN_2G_MODULATION | 645 FE_CAN_MULTISTREAM 646 }, 647 648 .get_tune_settings = si2168_get_tune_settings, 649 650 .init = si2168_init, 651 .sleep = si2168_sleep, 652 653 .set_frontend = si2168_set_frontend, 654 655 .read_status = si2168_read_status, 656 }; 657 658 static int si2168_probe(struct i2c_client *client, 659 const struct i2c_device_id *id) 660 { 661 struct si2168_config *config = client->dev.platform_data; 662 struct si2168_dev *dev; 663 int ret; 664 665 dev_dbg(&client->dev, "\n"); 666 667 dev = kzalloc(sizeof(*dev), GFP_KERNEL); 668 if (!dev) { 669 ret = -ENOMEM; 670 dev_err(&client->dev, "kzalloc() failed\n"); 671 goto err; 672 } 673 674 mutex_init(&dev->i2c_mutex); 675 676 /* create mux i2c adapter for tuner */ 677 dev->adapter = i2c_add_mux_adapter(client->adapter, &client->dev, 678 client, 0, 0, 0, si2168_select, si2168_deselect); 679 if (dev->adapter == NULL) { 680 ret = -ENODEV; 681 goto err_kfree; 682 } 683 684 /* create dvb_frontend */ 685 memcpy(&dev->fe.ops, &si2168_ops, sizeof(struct dvb_frontend_ops)); 686 dev->fe.demodulator_priv = client; 687 *config->i2c_adapter = dev->adapter; 688 *config->fe = &dev->fe; 689 dev->ts_mode = config->ts_mode; 690 dev->ts_clock_inv = config->ts_clock_inv; 691 dev->fw_loaded = false; 692 693 i2c_set_clientdata(client, dev); 694 695 dev_info(&client->dev, "Silicon Labs Si2168 successfully attached\n"); 696 return 0; 697 err_kfree: 698 kfree(dev); 699 err: 700 dev_dbg(&client->dev, "failed=%d\n", ret); 701 return ret; 702 } 703 704 static int si2168_remove(struct i2c_client *client) 705 { 706 struct si2168_dev *dev = i2c_get_clientdata(client); 707 708 dev_dbg(&client->dev, "\n"); 709 710 i2c_del_mux_adapter(dev->adapter); 711 712 dev->fe.ops.release = NULL; 713 dev->fe.demodulator_priv = NULL; 714 715 kfree(dev); 716 717 return 0; 718 } 719 720 static const struct i2c_device_id si2168_id_table[] = { 721 {"si2168", 0}, 722 {} 723 }; 724 MODULE_DEVICE_TABLE(i2c, si2168_id_table); 725 726 static struct i2c_driver si2168_driver = { 727 .driver = { 728 .owner = THIS_MODULE, 729 .name = "si2168", 730 }, 731 .probe = si2168_probe, 732 .remove = si2168_remove, 733 .id_table = si2168_id_table, 734 }; 735 736 module_i2c_driver(si2168_driver); 737 738 MODULE_AUTHOR("Antti Palosaari <crope@iki.fi>"); 739 MODULE_DESCRIPTION("Silicon Labs Si2168 DVB-T/T2/C demodulator driver"); 740 MODULE_LICENSE("GPL"); 741 MODULE_FIRMWARE(SI2168_A20_FIRMWARE); 742 MODULE_FIRMWARE(SI2168_A30_FIRMWARE); 743 MODULE_FIRMWARE(SI2168_B40_FIRMWARE); 744