1 /* 2 * Silicon Labs Si2146/2147/2148/2157/2158 silicon tuner 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 "si2157_priv.h" 18 19 static const struct dvb_tuner_ops si2157_ops; 20 21 /* execute firmware command */ 22 static int si2157_cmd_execute(struct i2c_client *client, struct si2157_cmd *cmd) 23 { 24 struct si2157_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 80 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 si2157_init(struct dvb_frontend *fe) 79 { 80 struct i2c_client *client = fe->tuner_priv; 81 struct si2157_dev *dev = i2c_get_clientdata(client); 82 struct dtv_frontend_properties *c = &fe->dtv_property_cache; 83 int ret, len, remaining; 84 struct si2157_cmd cmd; 85 const struct firmware *fw; 86 const char *fw_name; 87 unsigned int uitmp, chip_id; 88 89 dev_dbg(&client->dev, "\n"); 90 91 /* Returned IF frequency is garbage when firmware is not running */ 92 memcpy(cmd.args, "\x15\x00\x06\x07", 4); 93 cmd.wlen = 4; 94 cmd.rlen = 4; 95 ret = si2157_cmd_execute(client, &cmd); 96 if (ret) 97 goto err; 98 99 uitmp = cmd.args[2] << 0 | cmd.args[3] << 8; 100 dev_dbg(&client->dev, "if_frequency kHz=%u\n", uitmp); 101 102 if (uitmp == dev->if_frequency / 1000) 103 goto warm; 104 105 /* power up */ 106 if (dev->chiptype == SI2157_CHIPTYPE_SI2146) { 107 memcpy(cmd.args, "\xc0\x05\x01\x00\x00\x0b\x00\x00\x01", 9); 108 cmd.wlen = 9; 109 } else { 110 memcpy(cmd.args, "\xc0\x00\x0c\x00\x00\x01\x01\x01\x01\x01\x01\x02\x00\x00\x01", 15); 111 cmd.wlen = 15; 112 } 113 cmd.rlen = 1; 114 ret = si2157_cmd_execute(client, &cmd); 115 if (ret) 116 goto err; 117 118 /* query chip revision */ 119 memcpy(cmd.args, "\x02", 1); 120 cmd.wlen = 1; 121 cmd.rlen = 13; 122 ret = si2157_cmd_execute(client, &cmd); 123 if (ret) 124 goto err; 125 126 chip_id = cmd.args[1] << 24 | cmd.args[2] << 16 | cmd.args[3] << 8 | 127 cmd.args[4] << 0; 128 129 #define SI2158_A20 ('A' << 24 | 58 << 16 | '2' << 8 | '0' << 0) 130 #define SI2148_A20 ('A' << 24 | 48 << 16 | '2' << 8 | '0' << 0) 131 #define SI2157_A30 ('A' << 24 | 57 << 16 | '3' << 8 | '0' << 0) 132 #define SI2147_A30 ('A' << 24 | 47 << 16 | '3' << 8 | '0' << 0) 133 #define SI2146_A10 ('A' << 24 | 46 << 16 | '1' << 8 | '0' << 0) 134 135 switch (chip_id) { 136 case SI2158_A20: 137 case SI2148_A20: 138 fw_name = SI2158_A20_FIRMWARE; 139 break; 140 case SI2157_A30: 141 case SI2147_A30: 142 case SI2146_A10: 143 fw_name = NULL; 144 break; 145 default: 146 dev_err(&client->dev, "unknown chip version Si21%d-%c%c%c\n", 147 cmd.args[2], cmd.args[1], 148 cmd.args[3], cmd.args[4]); 149 ret = -EINVAL; 150 goto err; 151 } 152 153 dev_info(&client->dev, "found a 'Silicon Labs Si21%d-%c%c%c'\n", 154 cmd.args[2], cmd.args[1], cmd.args[3], cmd.args[4]); 155 156 if (fw_name == NULL) 157 goto skip_fw_download; 158 159 /* request the firmware, this will block and timeout */ 160 ret = request_firmware(&fw, fw_name, &client->dev); 161 if (ret) { 162 dev_err(&client->dev, "firmware file '%s' not found\n", 163 fw_name); 164 goto err; 165 } 166 167 /* firmware should be n chunks of 17 bytes */ 168 if (fw->size % 17 != 0) { 169 dev_err(&client->dev, "firmware file '%s' is invalid\n", 170 fw_name); 171 ret = -EINVAL; 172 goto err_release_firmware; 173 } 174 175 dev_info(&client->dev, "downloading firmware from file '%s'\n", 176 fw_name); 177 178 for (remaining = fw->size; remaining > 0; remaining -= 17) { 179 len = fw->data[fw->size - remaining]; 180 if (len > SI2157_ARGLEN) { 181 dev_err(&client->dev, "Bad firmware length\n"); 182 ret = -EINVAL; 183 goto err_release_firmware; 184 } 185 memcpy(cmd.args, &fw->data[(fw->size - remaining) + 1], len); 186 cmd.wlen = len; 187 cmd.rlen = 1; 188 ret = si2157_cmd_execute(client, &cmd); 189 if (ret) { 190 dev_err(&client->dev, "firmware download failed %d\n", 191 ret); 192 goto err_release_firmware; 193 } 194 } 195 196 release_firmware(fw); 197 198 skip_fw_download: 199 /* reboot the tuner with new firmware? */ 200 memcpy(cmd.args, "\x01\x01", 2); 201 cmd.wlen = 2; 202 cmd.rlen = 1; 203 ret = si2157_cmd_execute(client, &cmd); 204 if (ret) 205 goto err; 206 207 /* query firmware version */ 208 memcpy(cmd.args, "\x11", 1); 209 cmd.wlen = 1; 210 cmd.rlen = 10; 211 ret = si2157_cmd_execute(client, &cmd); 212 if (ret) 213 goto err; 214 215 dev_info(&client->dev, "firmware version: %c.%c.%d\n", 216 cmd.args[6], cmd.args[7], cmd.args[8]); 217 warm: 218 /* init statistics in order signal app which are supported */ 219 c->strength.len = 1; 220 c->strength.stat[0].scale = FE_SCALE_NOT_AVAILABLE; 221 /* start statistics polling */ 222 schedule_delayed_work(&dev->stat_work, msecs_to_jiffies(1000)); 223 224 dev->active = true; 225 return 0; 226 err_release_firmware: 227 release_firmware(fw); 228 err: 229 dev_dbg(&client->dev, "failed=%d\n", ret); 230 return ret; 231 } 232 233 static int si2157_sleep(struct dvb_frontend *fe) 234 { 235 struct i2c_client *client = fe->tuner_priv; 236 struct si2157_dev *dev = i2c_get_clientdata(client); 237 int ret; 238 struct si2157_cmd cmd; 239 240 dev_dbg(&client->dev, "\n"); 241 242 dev->active = false; 243 244 /* stop statistics polling */ 245 cancel_delayed_work_sync(&dev->stat_work); 246 247 /* standby */ 248 memcpy(cmd.args, "\x16\x00", 2); 249 cmd.wlen = 2; 250 cmd.rlen = 1; 251 ret = si2157_cmd_execute(client, &cmd); 252 if (ret) 253 goto err; 254 255 return 0; 256 err: 257 dev_dbg(&client->dev, "failed=%d\n", ret); 258 return ret; 259 } 260 261 static int si2157_set_params(struct dvb_frontend *fe) 262 { 263 struct i2c_client *client = fe->tuner_priv; 264 struct si2157_dev *dev = i2c_get_clientdata(client); 265 struct dtv_frontend_properties *c = &fe->dtv_property_cache; 266 int ret; 267 struct si2157_cmd cmd; 268 u8 bandwidth, delivery_system; 269 u32 if_frequency = 5000000; 270 271 dev_dbg(&client->dev, 272 "delivery_system=%d frequency=%u bandwidth_hz=%u\n", 273 c->delivery_system, c->frequency, c->bandwidth_hz); 274 275 if (!dev->active) { 276 ret = -EAGAIN; 277 goto err; 278 } 279 280 if (c->bandwidth_hz <= 6000000) 281 bandwidth = 0x06; 282 else if (c->bandwidth_hz <= 7000000) 283 bandwidth = 0x07; 284 else if (c->bandwidth_hz <= 8000000) 285 bandwidth = 0x08; 286 else 287 bandwidth = 0x0f; 288 289 switch (c->delivery_system) { 290 case SYS_ATSC: 291 delivery_system = 0x00; 292 if_frequency = 3250000; 293 break; 294 case SYS_DVBC_ANNEX_B: 295 delivery_system = 0x10; 296 if_frequency = 4000000; 297 break; 298 case SYS_DVBT: 299 case SYS_DVBT2: /* it seems DVB-T and DVB-T2 both are 0x20 here */ 300 delivery_system = 0x20; 301 break; 302 case SYS_DVBC_ANNEX_A: 303 delivery_system = 0x30; 304 break; 305 default: 306 ret = -EINVAL; 307 goto err; 308 } 309 310 memcpy(cmd.args, "\x14\x00\x03\x07\x00\x00", 6); 311 cmd.args[4] = delivery_system | bandwidth; 312 if (dev->inversion) 313 cmd.args[5] = 0x01; 314 cmd.wlen = 6; 315 cmd.rlen = 4; 316 ret = si2157_cmd_execute(client, &cmd); 317 if (ret) 318 goto err; 319 320 if (dev->chiptype == SI2157_CHIPTYPE_SI2146) 321 memcpy(cmd.args, "\x14\x00\x02\x07\x00\x01", 6); 322 else 323 memcpy(cmd.args, "\x14\x00\x02\x07\x00\x00", 6); 324 cmd.args[4] = dev->if_port; 325 cmd.wlen = 6; 326 cmd.rlen = 4; 327 ret = si2157_cmd_execute(client, &cmd); 328 if (ret) 329 goto err; 330 331 /* set if frequency if needed */ 332 if (if_frequency != dev->if_frequency) { 333 memcpy(cmd.args, "\x14\x00\x06\x07", 4); 334 cmd.args[4] = (if_frequency / 1000) & 0xff; 335 cmd.args[5] = ((if_frequency / 1000) >> 8) & 0xff; 336 cmd.wlen = 6; 337 cmd.rlen = 4; 338 ret = si2157_cmd_execute(client, &cmd); 339 if (ret) 340 goto err; 341 342 dev->if_frequency = if_frequency; 343 } 344 345 /* set frequency */ 346 memcpy(cmd.args, "\x41\x00\x00\x00\x00\x00\x00\x00", 8); 347 cmd.args[4] = (c->frequency >> 0) & 0xff; 348 cmd.args[5] = (c->frequency >> 8) & 0xff; 349 cmd.args[6] = (c->frequency >> 16) & 0xff; 350 cmd.args[7] = (c->frequency >> 24) & 0xff; 351 cmd.wlen = 8; 352 cmd.rlen = 1; 353 ret = si2157_cmd_execute(client, &cmd); 354 if (ret) 355 goto err; 356 357 return 0; 358 err: 359 dev_dbg(&client->dev, "failed=%d\n", ret); 360 return ret; 361 } 362 363 static int si2157_get_if_frequency(struct dvb_frontend *fe, u32 *frequency) 364 { 365 struct i2c_client *client = fe->tuner_priv; 366 struct si2157_dev *dev = i2c_get_clientdata(client); 367 368 *frequency = dev->if_frequency; 369 return 0; 370 } 371 372 static const struct dvb_tuner_ops si2157_ops = { 373 .info = { 374 .name = "Silicon Labs Si2146/2147/2148/2157/2158", 375 .frequency_min = 42000000, 376 .frequency_max = 870000000, 377 }, 378 379 .init = si2157_init, 380 .sleep = si2157_sleep, 381 .set_params = si2157_set_params, 382 .get_if_frequency = si2157_get_if_frequency, 383 }; 384 385 static void si2157_stat_work(struct work_struct *work) 386 { 387 struct si2157_dev *dev = container_of(work, struct si2157_dev, stat_work.work); 388 struct dvb_frontend *fe = dev->fe; 389 struct i2c_client *client = fe->tuner_priv; 390 struct dtv_frontend_properties *c = &fe->dtv_property_cache; 391 struct si2157_cmd cmd; 392 int ret; 393 394 dev_dbg(&client->dev, "\n"); 395 396 memcpy(cmd.args, "\x42\x00", 2); 397 cmd.wlen = 2; 398 cmd.rlen = 12; 399 ret = si2157_cmd_execute(client, &cmd); 400 if (ret) 401 goto err; 402 403 c->strength.stat[0].scale = FE_SCALE_DECIBEL; 404 c->strength.stat[0].svalue = (s8) cmd.args[3] * 1000; 405 406 schedule_delayed_work(&dev->stat_work, msecs_to_jiffies(2000)); 407 return; 408 err: 409 c->strength.stat[0].scale = FE_SCALE_NOT_AVAILABLE; 410 dev_dbg(&client->dev, "failed=%d\n", ret); 411 } 412 413 static int si2157_probe(struct i2c_client *client, 414 const struct i2c_device_id *id) 415 { 416 struct si2157_config *cfg = client->dev.platform_data; 417 struct dvb_frontend *fe = cfg->fe; 418 struct si2157_dev *dev; 419 struct si2157_cmd cmd; 420 int ret; 421 422 dev = kzalloc(sizeof(*dev), GFP_KERNEL); 423 if (!dev) { 424 ret = -ENOMEM; 425 dev_err(&client->dev, "kzalloc() failed\n"); 426 goto err; 427 } 428 429 i2c_set_clientdata(client, dev); 430 dev->fe = cfg->fe; 431 dev->inversion = cfg->inversion; 432 dev->if_port = cfg->if_port; 433 dev->chiptype = (u8)id->driver_data; 434 dev->if_frequency = 5000000; /* default value of property 0x0706 */ 435 mutex_init(&dev->i2c_mutex); 436 INIT_DELAYED_WORK(&dev->stat_work, si2157_stat_work); 437 438 /* check if the tuner is there */ 439 cmd.wlen = 0; 440 cmd.rlen = 1; 441 ret = si2157_cmd_execute(client, &cmd); 442 if (ret) 443 goto err_kfree; 444 445 memcpy(&fe->ops.tuner_ops, &si2157_ops, sizeof(struct dvb_tuner_ops)); 446 fe->tuner_priv = client; 447 448 #ifdef CONFIG_MEDIA_CONTROLLER 449 if (cfg->mdev) { 450 dev->mdev = cfg->mdev; 451 452 dev->ent.name = KBUILD_MODNAME; 453 dev->ent.function = MEDIA_ENT_F_TUNER; 454 455 dev->pad[TUNER_PAD_RF_INPUT].flags = MEDIA_PAD_FL_SINK; 456 dev->pad[TUNER_PAD_OUTPUT].flags = MEDIA_PAD_FL_SOURCE; 457 dev->pad[TUNER_PAD_AUD_OUT].flags = MEDIA_PAD_FL_SOURCE; 458 459 ret = media_entity_pads_init(&dev->ent, TUNER_NUM_PADS, 460 &dev->pad[0]); 461 462 if (ret) 463 goto err_kfree; 464 465 ret = media_device_register_entity(cfg->mdev, &dev->ent); 466 if (ret) { 467 media_entity_cleanup(&dev->ent); 468 goto err_kfree; 469 } 470 } 471 #endif 472 473 dev_info(&client->dev, "Silicon Labs %s successfully attached\n", 474 dev->chiptype == SI2157_CHIPTYPE_SI2146 ? 475 "Si2146" : "Si2147/2148/2157/2158"); 476 477 return 0; 478 479 err_kfree: 480 kfree(dev); 481 err: 482 dev_dbg(&client->dev, "failed=%d\n", ret); 483 return ret; 484 } 485 486 static int si2157_remove(struct i2c_client *client) 487 { 488 struct si2157_dev *dev = i2c_get_clientdata(client); 489 struct dvb_frontend *fe = dev->fe; 490 491 dev_dbg(&client->dev, "\n"); 492 493 /* stop statistics polling */ 494 cancel_delayed_work_sync(&dev->stat_work); 495 496 #ifdef CONFIG_MEDIA_CONTROLLER_DVB 497 if (dev->mdev) 498 media_device_unregister_entity(&dev->ent); 499 #endif 500 501 memset(&fe->ops.tuner_ops, 0, sizeof(struct dvb_tuner_ops)); 502 fe->tuner_priv = NULL; 503 kfree(dev); 504 505 return 0; 506 } 507 508 static const struct i2c_device_id si2157_id_table[] = { 509 {"si2157", SI2157_CHIPTYPE_SI2157}, 510 {"si2146", SI2157_CHIPTYPE_SI2146}, 511 {} 512 }; 513 MODULE_DEVICE_TABLE(i2c, si2157_id_table); 514 515 static struct i2c_driver si2157_driver = { 516 .driver = { 517 .name = "si2157", 518 }, 519 .probe = si2157_probe, 520 .remove = si2157_remove, 521 .id_table = si2157_id_table, 522 }; 523 524 module_i2c_driver(si2157_driver); 525 526 MODULE_DESCRIPTION("Silicon Labs Si2146/2147/2148/2157/2158 silicon tuner driver"); 527 MODULE_AUTHOR("Antti Palosaari <crope@iki.fi>"); 528 MODULE_LICENSE("GPL"); 529 MODULE_FIRMWARE(SI2158_A20_FIRMWARE); 530