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 chip_id; 88 89 dev_dbg(&client->dev, "\n"); 90 91 if (dev->fw_loaded) 92 goto warm; 93 94 /* power up */ 95 if (dev->chiptype == SI2157_CHIPTYPE_SI2146) { 96 memcpy(cmd.args, "\xc0\x05\x01\x00\x00\x0b\x00\x00\x01", 9); 97 cmd.wlen = 9; 98 } else { 99 memcpy(cmd.args, "\xc0\x00\x0c\x00\x00\x01\x01\x01\x01\x01\x01\x02\x00\x00\x01", 15); 100 cmd.wlen = 15; 101 } 102 cmd.rlen = 1; 103 ret = si2157_cmd_execute(client, &cmd); 104 if (ret) 105 goto err; 106 107 /* query chip revision */ 108 memcpy(cmd.args, "\x02", 1); 109 cmd.wlen = 1; 110 cmd.rlen = 13; 111 ret = si2157_cmd_execute(client, &cmd); 112 if (ret) 113 goto err; 114 115 chip_id = cmd.args[1] << 24 | cmd.args[2] << 16 | cmd.args[3] << 8 | 116 cmd.args[4] << 0; 117 118 #define SI2158_A20 ('A' << 24 | 58 << 16 | '2' << 8 | '0' << 0) 119 #define SI2148_A20 ('A' << 24 | 48 << 16 | '2' << 8 | '0' << 0) 120 #define SI2157_A30 ('A' << 24 | 57 << 16 | '3' << 8 | '0' << 0) 121 #define SI2147_A30 ('A' << 24 | 47 << 16 | '3' << 8 | '0' << 0) 122 #define SI2146_A10 ('A' << 24 | 46 << 16 | '1' << 8 | '0' << 0) 123 124 switch (chip_id) { 125 case SI2158_A20: 126 case SI2148_A20: 127 fw_name = SI2158_A20_FIRMWARE; 128 break; 129 case SI2157_A30: 130 case SI2147_A30: 131 case SI2146_A10: 132 fw_name = NULL; 133 break; 134 default: 135 dev_err(&client->dev, "unknown chip version Si21%d-%c%c%c\n", 136 cmd.args[2], cmd.args[1], 137 cmd.args[3], cmd.args[4]); 138 ret = -EINVAL; 139 goto err; 140 } 141 142 dev_info(&client->dev, "found a 'Silicon Labs Si21%d-%c%c%c'\n", 143 cmd.args[2], cmd.args[1], cmd.args[3], cmd.args[4]); 144 145 if (fw_name == NULL) 146 goto skip_fw_download; 147 148 /* request the firmware, this will block and timeout */ 149 ret = request_firmware(&fw, fw_name, &client->dev); 150 if (ret) { 151 dev_err(&client->dev, "firmware file '%s' not found\n", 152 fw_name); 153 goto err; 154 } 155 156 /* firmware should be n chunks of 17 bytes */ 157 if (fw->size % 17 != 0) { 158 dev_err(&client->dev, "firmware file '%s' is invalid\n", 159 fw_name); 160 ret = -EINVAL; 161 goto err_release_firmware; 162 } 163 164 dev_info(&client->dev, "downloading firmware from file '%s'\n", 165 fw_name); 166 167 for (remaining = fw->size; remaining > 0; remaining -= 17) { 168 len = fw->data[fw->size - remaining]; 169 if (len > SI2157_ARGLEN) { 170 dev_err(&client->dev, "Bad firmware length\n"); 171 ret = -EINVAL; 172 goto err_release_firmware; 173 } 174 memcpy(cmd.args, &fw->data[(fw->size - remaining) + 1], len); 175 cmd.wlen = len; 176 cmd.rlen = 1; 177 ret = si2157_cmd_execute(client, &cmd); 178 if (ret) { 179 dev_err(&client->dev, "firmware download failed %d\n", 180 ret); 181 goto err_release_firmware; 182 } 183 } 184 185 release_firmware(fw); 186 187 skip_fw_download: 188 /* reboot the tuner with new firmware? */ 189 memcpy(cmd.args, "\x01\x01", 2); 190 cmd.wlen = 2; 191 cmd.rlen = 1; 192 ret = si2157_cmd_execute(client, &cmd); 193 if (ret) 194 goto err; 195 196 /* query firmware version */ 197 memcpy(cmd.args, "\x11", 1); 198 cmd.wlen = 1; 199 cmd.rlen = 10; 200 ret = si2157_cmd_execute(client, &cmd); 201 if (ret) 202 goto err; 203 204 dev_info(&client->dev, "firmware version: %c.%c.%d\n", 205 cmd.args[6], cmd.args[7], cmd.args[8]); 206 207 dev->fw_loaded = true; 208 209 warm: 210 /* init statistics in order signal app which are supported */ 211 c->strength.len = 1; 212 c->strength.stat[0].scale = FE_SCALE_NOT_AVAILABLE; 213 /* start statistics polling */ 214 schedule_delayed_work(&dev->stat_work, msecs_to_jiffies(1000)); 215 216 dev->active = true; 217 return 0; 218 err_release_firmware: 219 release_firmware(fw); 220 err: 221 dev_dbg(&client->dev, "failed=%d\n", ret); 222 return ret; 223 } 224 225 static int si2157_sleep(struct dvb_frontend *fe) 226 { 227 struct i2c_client *client = fe->tuner_priv; 228 struct si2157_dev *dev = i2c_get_clientdata(client); 229 int ret; 230 struct si2157_cmd cmd; 231 232 dev_dbg(&client->dev, "\n"); 233 234 dev->active = false; 235 236 /* stop statistics polling */ 237 cancel_delayed_work_sync(&dev->stat_work); 238 239 /* standby */ 240 memcpy(cmd.args, "\x16\x00", 2); 241 cmd.wlen = 2; 242 cmd.rlen = 1; 243 ret = si2157_cmd_execute(client, &cmd); 244 if (ret) 245 goto err; 246 247 return 0; 248 err: 249 dev_dbg(&client->dev, "failed=%d\n", ret); 250 return ret; 251 } 252 253 static int si2157_set_params(struct dvb_frontend *fe) 254 { 255 struct i2c_client *client = fe->tuner_priv; 256 struct si2157_dev *dev = i2c_get_clientdata(client); 257 struct dtv_frontend_properties *c = &fe->dtv_property_cache; 258 int ret; 259 struct si2157_cmd cmd; 260 u8 bandwidth, delivery_system; 261 u32 if_frequency = 5000000; 262 263 dev_dbg(&client->dev, 264 "delivery_system=%d frequency=%u bandwidth_hz=%u\n", 265 c->delivery_system, c->frequency, c->bandwidth_hz); 266 267 if (!dev->active) { 268 ret = -EAGAIN; 269 goto err; 270 } 271 272 if (c->bandwidth_hz <= 6000000) 273 bandwidth = 0x06; 274 else if (c->bandwidth_hz <= 7000000) 275 bandwidth = 0x07; 276 else if (c->bandwidth_hz <= 8000000) 277 bandwidth = 0x08; 278 else 279 bandwidth = 0x0f; 280 281 switch (c->delivery_system) { 282 case SYS_ATSC: 283 delivery_system = 0x00; 284 if_frequency = 3250000; 285 break; 286 case SYS_DVBC_ANNEX_B: 287 delivery_system = 0x10; 288 if_frequency = 4000000; 289 break; 290 case SYS_DVBT: 291 case SYS_DVBT2: /* it seems DVB-T and DVB-T2 both are 0x20 here */ 292 delivery_system = 0x20; 293 break; 294 case SYS_DVBC_ANNEX_A: 295 delivery_system = 0x30; 296 break; 297 default: 298 ret = -EINVAL; 299 goto err; 300 } 301 302 memcpy(cmd.args, "\x14\x00\x03\x07\x00\x00", 6); 303 cmd.args[4] = delivery_system | bandwidth; 304 if (dev->inversion) 305 cmd.args[5] = 0x01; 306 cmd.wlen = 6; 307 cmd.rlen = 4; 308 ret = si2157_cmd_execute(client, &cmd); 309 if (ret) 310 goto err; 311 312 if (dev->chiptype == SI2157_CHIPTYPE_SI2146) 313 memcpy(cmd.args, "\x14\x00\x02\x07\x00\x01", 6); 314 else 315 memcpy(cmd.args, "\x14\x00\x02\x07\x00\x00", 6); 316 cmd.args[4] = dev->if_port; 317 cmd.wlen = 6; 318 cmd.rlen = 4; 319 ret = si2157_cmd_execute(client, &cmd); 320 if (ret) 321 goto err; 322 323 /* set if frequency if needed */ 324 if (if_frequency != dev->if_frequency) { 325 memcpy(cmd.args, "\x14\x00\x06\x07", 4); 326 cmd.args[4] = (if_frequency / 1000) & 0xff; 327 cmd.args[5] = ((if_frequency / 1000) >> 8) & 0xff; 328 cmd.wlen = 6; 329 cmd.rlen = 4; 330 ret = si2157_cmd_execute(client, &cmd); 331 if (ret) 332 goto err; 333 334 dev->if_frequency = if_frequency; 335 } 336 337 /* set frequency */ 338 memcpy(cmd.args, "\x41\x00\x00\x00\x00\x00\x00\x00", 8); 339 cmd.args[4] = (c->frequency >> 0) & 0xff; 340 cmd.args[5] = (c->frequency >> 8) & 0xff; 341 cmd.args[6] = (c->frequency >> 16) & 0xff; 342 cmd.args[7] = (c->frequency >> 24) & 0xff; 343 cmd.wlen = 8; 344 cmd.rlen = 1; 345 ret = si2157_cmd_execute(client, &cmd); 346 if (ret) 347 goto err; 348 349 return 0; 350 err: 351 dev_dbg(&client->dev, "failed=%d\n", ret); 352 return ret; 353 } 354 355 static int si2157_get_if_frequency(struct dvb_frontend *fe, u32 *frequency) 356 { 357 struct i2c_client *client = fe->tuner_priv; 358 struct si2157_dev *dev = i2c_get_clientdata(client); 359 360 *frequency = dev->if_frequency; 361 return 0; 362 } 363 364 static const struct dvb_tuner_ops si2157_ops = { 365 .info = { 366 .name = "Silicon Labs Si2146/2147/2148/2157/2158", 367 .frequency_min = 55000000, 368 .frequency_max = 862000000, 369 }, 370 371 .init = si2157_init, 372 .sleep = si2157_sleep, 373 .set_params = si2157_set_params, 374 .get_if_frequency = si2157_get_if_frequency, 375 }; 376 377 static void si2157_stat_work(struct work_struct *work) 378 { 379 struct si2157_dev *dev = container_of(work, struct si2157_dev, stat_work.work); 380 struct dvb_frontend *fe = dev->fe; 381 struct i2c_client *client = fe->tuner_priv; 382 struct dtv_frontend_properties *c = &fe->dtv_property_cache; 383 struct si2157_cmd cmd; 384 int ret; 385 386 dev_dbg(&client->dev, "\n"); 387 388 memcpy(cmd.args, "\x42\x00", 2); 389 cmd.wlen = 2; 390 cmd.rlen = 12; 391 ret = si2157_cmd_execute(client, &cmd); 392 if (ret) 393 goto err; 394 395 c->strength.stat[0].scale = FE_SCALE_DECIBEL; 396 c->strength.stat[0].svalue = (s8) cmd.args[3] * 1000; 397 398 schedule_delayed_work(&dev->stat_work, msecs_to_jiffies(2000)); 399 return; 400 err: 401 c->strength.stat[0].scale = FE_SCALE_NOT_AVAILABLE; 402 dev_dbg(&client->dev, "failed=%d\n", ret); 403 } 404 405 static int si2157_probe(struct i2c_client *client, 406 const struct i2c_device_id *id) 407 { 408 struct si2157_config *cfg = client->dev.platform_data; 409 struct dvb_frontend *fe = cfg->fe; 410 struct si2157_dev *dev; 411 struct si2157_cmd cmd; 412 int ret; 413 414 dev = kzalloc(sizeof(*dev), GFP_KERNEL); 415 if (!dev) { 416 ret = -ENOMEM; 417 dev_err(&client->dev, "kzalloc() failed\n"); 418 goto err; 419 } 420 421 i2c_set_clientdata(client, dev); 422 dev->fe = cfg->fe; 423 dev->inversion = cfg->inversion; 424 dev->if_port = cfg->if_port; 425 dev->fw_loaded = false; 426 dev->chiptype = (u8)id->driver_data; 427 dev->if_frequency = 5000000; /* default value of property 0x0706 */ 428 mutex_init(&dev->i2c_mutex); 429 INIT_DELAYED_WORK(&dev->stat_work, si2157_stat_work); 430 431 /* check if the tuner is there */ 432 cmd.wlen = 0; 433 cmd.rlen = 1; 434 ret = si2157_cmd_execute(client, &cmd); 435 if (ret) 436 goto err_kfree; 437 438 memcpy(&fe->ops.tuner_ops, &si2157_ops, sizeof(struct dvb_tuner_ops)); 439 fe->tuner_priv = client; 440 441 dev_info(&client->dev, "Silicon Labs %s successfully attached\n", 442 dev->chiptype == SI2157_CHIPTYPE_SI2146 ? 443 "Si2146" : "Si2147/2148/2157/2158"); 444 445 return 0; 446 447 err_kfree: 448 kfree(dev); 449 err: 450 dev_dbg(&client->dev, "failed=%d\n", ret); 451 return ret; 452 } 453 454 static int si2157_remove(struct i2c_client *client) 455 { 456 struct si2157_dev *dev = i2c_get_clientdata(client); 457 struct dvb_frontend *fe = dev->fe; 458 459 dev_dbg(&client->dev, "\n"); 460 461 memset(&fe->ops.tuner_ops, 0, sizeof(struct dvb_tuner_ops)); 462 fe->tuner_priv = NULL; 463 kfree(dev); 464 465 return 0; 466 } 467 468 static const struct i2c_device_id si2157_id_table[] = { 469 {"si2157", SI2157_CHIPTYPE_SI2157}, 470 {"si2146", SI2157_CHIPTYPE_SI2146}, 471 {} 472 }; 473 MODULE_DEVICE_TABLE(i2c, si2157_id_table); 474 475 static struct i2c_driver si2157_driver = { 476 .driver = { 477 .name = "si2157", 478 }, 479 .probe = si2157_probe, 480 .remove = si2157_remove, 481 .id_table = si2157_id_table, 482 }; 483 484 module_i2c_driver(si2157_driver); 485 486 MODULE_DESCRIPTION("Silicon Labs Si2146/2147/2148/2157/2158 silicon tuner driver"); 487 MODULE_AUTHOR("Antti Palosaari <crope@iki.fi>"); 488 MODULE_LICENSE("GPL"); 489 MODULE_FIRMWARE(SI2158_A20_FIRMWARE); 490