1 /* 2 * drivers/media/radio/si470x/radio-si470x-common.c 3 * 4 * Driver for radios with Silicon Labs Si470x FM Radio Receivers 5 * 6 * Copyright (c) 2009 Tobias Lorenz <tobias.lorenz@gmx.net> 7 * 8 * This program is free software; you can redistribute it and/or modify 9 * it under the terms of the GNU General Public License as published by 10 * the Free Software Foundation; either version 2 of the License, or 11 * (at your option) any later version. 12 * 13 * This program is distributed in the hope that it will be useful, 14 * but WITHOUT ANY WARRANTY; without even the implied warranty of 15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 16 * GNU General Public License for more details. 17 * 18 * You should have received a copy of the GNU General Public License 19 * along with this program; if not, write to the Free Software 20 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA 21 */ 22 23 24 /* 25 * History: 26 * 2008-01-12 Tobias Lorenz <tobias.lorenz@gmx.net> 27 * Version 1.0.0 28 * - First working version 29 * 2008-01-13 Tobias Lorenz <tobias.lorenz@gmx.net> 30 * Version 1.0.1 31 * - Improved error handling, every function now returns errno 32 * - Improved multi user access (start/mute/stop) 33 * - Channel doesn't get lost anymore after start/mute/stop 34 * - RDS support added (polling mode via interrupt EP 1) 35 * - marked default module parameters with *value* 36 * - switched from bit structs to bit masks 37 * - header file cleaned and integrated 38 * 2008-01-14 Tobias Lorenz <tobias.lorenz@gmx.net> 39 * Version 1.0.2 40 * - hex values are now lower case 41 * - commented USB ID for ADS/Tech moved on todo list 42 * - blacklisted si470x in hid-quirks.c 43 * - rds buffer handling functions integrated into *_work, *_read 44 * - rds_command in si470x_poll exchanged against simple retval 45 * - check for firmware version 15 46 * - code order and prototypes still remain the same 47 * - spacing and bottom of band codes remain the same 48 * 2008-01-16 Tobias Lorenz <tobias.lorenz@gmx.net> 49 * Version 1.0.3 50 * - code reordered to avoid function prototypes 51 * - switch/case defaults are now more user-friendly 52 * - unified comment style 53 * - applied all checkpatch.pl v1.12 suggestions 54 * except the warning about the too long lines with bit comments 55 * - renamed FMRADIO to RADIO to cut line length (checkpatch.pl) 56 * 2008-01-22 Tobias Lorenz <tobias.lorenz@gmx.net> 57 * Version 1.0.4 58 * - avoid poss. locking when doing copy_to_user which may sleep 59 * - RDS is automatically activated on read now 60 * - code cleaned of unnecessary rds_commands 61 * - USB Vendor/Product ID for ADS/Tech FM Radio Receiver verified 62 * (thanks to Guillaume RAMOUSSE) 63 * 2008-01-27 Tobias Lorenz <tobias.lorenz@gmx.net> 64 * Version 1.0.5 65 * - number of seek_retries changed to tune_timeout 66 * - fixed problem with incomplete tune operations by own buffers 67 * - optimization of variables and printf types 68 * - improved error logging 69 * 2008-01-31 Tobias Lorenz <tobias.lorenz@gmx.net> 70 * Oliver Neukum <oliver@neukum.org> 71 * Version 1.0.6 72 * - fixed coverity checker warnings in *_usb_driver_disconnect 73 * - probe()/open() race by correct ordering in probe() 74 * - DMA coherency rules by separate allocation of all buffers 75 * - use of endianness macros 76 * - abuse of spinlock, replaced by mutex 77 * - racy handling of timer in disconnect, 78 * replaced by delayed_work 79 * - racy interruptible_sleep_on(), 80 * replaced with wait_event_interruptible() 81 * - handle signals in read() 82 * 2008-02-08 Tobias Lorenz <tobias.lorenz@gmx.net> 83 * Oliver Neukum <oliver@neukum.org> 84 * Version 1.0.7 85 * - usb autosuspend support 86 * - unplugging fixed 87 * 2008-05-07 Tobias Lorenz <tobias.lorenz@gmx.net> 88 * Version 1.0.8 89 * - hardware frequency seek support 90 * - afc indication 91 * - more safety checks, let si470x_get_freq return errno 92 * - vidioc behavior corrected according to v4l2 spec 93 * 2008-10-20 Alexey Klimov <klimov.linux@gmail.com> 94 * - add support for KWorld USB FM Radio FM700 95 * - blacklisted KWorld radio in hid-core.c and hid-ids.h 96 * 2008-12-03 Mark Lord <mlord@pobox.com> 97 * - add support for DealExtreme USB Radio 98 * 2009-01-31 Bob Ross <pigiron@gmx.com> 99 * - correction of stereo detection/setting 100 * - correction of signal strength indicator scaling 101 * 2009-01-31 Rick Bronson <rick@efn.org> 102 * Tobias Lorenz <tobias.lorenz@gmx.net> 103 * - add LED status output 104 * - get HW/SW version from scratchpad 105 * 2009-06-16 Edouard Lafargue <edouard@lafargue.name> 106 * Version 1.0.10 107 * - add support for interrupt mode for RDS endpoint, 108 * instead of polling. 109 * Improves RDS reception significantly 110 */ 111 112 113 /* kernel includes */ 114 #include "radio-si470x.h" 115 116 117 118 /************************************************************************** 119 * Module Parameters 120 **************************************************************************/ 121 122 /* Spacing (kHz) */ 123 /* 0: 200 kHz (USA, Australia) */ 124 /* 1: 100 kHz (Europe, Japan) */ 125 /* 2: 50 kHz */ 126 static unsigned short space = 2; 127 module_param(space, ushort, 0444); 128 MODULE_PARM_DESC(space, "Spacing: 0=200kHz 1=100kHz *2=50kHz*"); 129 130 /* Bottom of Band (MHz) */ 131 /* 0: 87.5 - 108 MHz (USA, Europe)*/ 132 /* 1: 76 - 108 MHz (Japan wide band) */ 133 /* 2: 76 - 90 MHz (Japan) */ 134 static unsigned short band = 1; 135 module_param(band, ushort, 0444); 136 MODULE_PARM_DESC(band, "Band: 0=87.5..108MHz *1=76..108MHz* 2=76..90MHz"); 137 138 /* De-emphasis */ 139 /* 0: 75 us (USA) */ 140 /* 1: 50 us (Europe, Australia, Japan) */ 141 static unsigned short de = 1; 142 module_param(de, ushort, 0444); 143 MODULE_PARM_DESC(de, "De-emphasis: 0=75us *1=50us*"); 144 145 /* Tune timeout */ 146 static unsigned int tune_timeout = 3000; 147 module_param(tune_timeout, uint, 0644); 148 MODULE_PARM_DESC(tune_timeout, "Tune timeout: *3000*"); 149 150 /* Seek timeout */ 151 static unsigned int seek_timeout = 5000; 152 module_param(seek_timeout, uint, 0644); 153 MODULE_PARM_DESC(seek_timeout, "Seek timeout: *5000*"); 154 155 156 157 /************************************************************************** 158 * Generic Functions 159 **************************************************************************/ 160 161 /* 162 * si470x_set_chan - set the channel 163 */ 164 static int si470x_set_chan(struct si470x_device *radio, unsigned short chan) 165 { 166 int retval; 167 unsigned long timeout; 168 bool timed_out = 0; 169 170 /* start tuning */ 171 radio->registers[CHANNEL] &= ~CHANNEL_CHAN; 172 radio->registers[CHANNEL] |= CHANNEL_TUNE | chan; 173 retval = si470x_set_register(radio, CHANNEL); 174 if (retval < 0) 175 goto done; 176 177 /* wait till tune operation has completed */ 178 timeout = jiffies + msecs_to_jiffies(tune_timeout); 179 do { 180 retval = si470x_get_register(radio, STATUSRSSI); 181 if (retval < 0) 182 goto stop; 183 timed_out = time_after(jiffies, timeout); 184 } while (((radio->registers[STATUSRSSI] & STATUSRSSI_STC) == 0) && 185 (!timed_out)); 186 if ((radio->registers[STATUSRSSI] & STATUSRSSI_STC) == 0) 187 dev_warn(&radio->videodev->dev, "tune does not complete\n"); 188 if (timed_out) 189 dev_warn(&radio->videodev->dev, 190 "tune timed out after %u ms\n", tune_timeout); 191 192 stop: 193 /* stop tuning */ 194 radio->registers[CHANNEL] &= ~CHANNEL_TUNE; 195 retval = si470x_set_register(radio, CHANNEL); 196 197 done: 198 return retval; 199 } 200 201 202 /* 203 * si470x_get_freq - get the frequency 204 */ 205 static int si470x_get_freq(struct si470x_device *radio, unsigned int *freq) 206 { 207 unsigned int spacing, band_bottom; 208 unsigned short chan; 209 int retval; 210 211 /* Spacing (kHz) */ 212 switch ((radio->registers[SYSCONFIG2] & SYSCONFIG2_SPACE) >> 4) { 213 /* 0: 200 kHz (USA, Australia) */ 214 case 0: 215 spacing = 0.200 * FREQ_MUL; break; 216 /* 1: 100 kHz (Europe, Japan) */ 217 case 1: 218 spacing = 0.100 * FREQ_MUL; break; 219 /* 2: 50 kHz */ 220 default: 221 spacing = 0.050 * FREQ_MUL; break; 222 }; 223 224 /* Bottom of Band (MHz) */ 225 switch ((radio->registers[SYSCONFIG2] & SYSCONFIG2_BAND) >> 6) { 226 /* 0: 87.5 - 108 MHz (USA, Europe) */ 227 case 0: 228 band_bottom = 87.5 * FREQ_MUL; break; 229 /* 1: 76 - 108 MHz (Japan wide band) */ 230 default: 231 band_bottom = 76 * FREQ_MUL; break; 232 /* 2: 76 - 90 MHz (Japan) */ 233 case 2: 234 band_bottom = 76 * FREQ_MUL; break; 235 }; 236 237 /* read channel */ 238 retval = si470x_get_register(radio, READCHAN); 239 chan = radio->registers[READCHAN] & READCHAN_READCHAN; 240 241 /* Frequency (MHz) = Spacing (kHz) x Channel + Bottom of Band (MHz) */ 242 *freq = chan * spacing + band_bottom; 243 244 return retval; 245 } 246 247 248 /* 249 * si470x_set_freq - set the frequency 250 */ 251 int si470x_set_freq(struct si470x_device *radio, unsigned int freq) 252 { 253 unsigned int spacing, band_bottom; 254 unsigned short chan; 255 256 /* Spacing (kHz) */ 257 switch ((radio->registers[SYSCONFIG2] & SYSCONFIG2_SPACE) >> 4) { 258 /* 0: 200 kHz (USA, Australia) */ 259 case 0: 260 spacing = 0.200 * FREQ_MUL; break; 261 /* 1: 100 kHz (Europe, Japan) */ 262 case 1: 263 spacing = 0.100 * FREQ_MUL; break; 264 /* 2: 50 kHz */ 265 default: 266 spacing = 0.050 * FREQ_MUL; break; 267 }; 268 269 /* Bottom of Band (MHz) */ 270 switch ((radio->registers[SYSCONFIG2] & SYSCONFIG2_BAND) >> 6) { 271 /* 0: 87.5 - 108 MHz (USA, Europe) */ 272 case 0: 273 band_bottom = 87.5 * FREQ_MUL; break; 274 /* 1: 76 - 108 MHz (Japan wide band) */ 275 default: 276 band_bottom = 76 * FREQ_MUL; break; 277 /* 2: 76 - 90 MHz (Japan) */ 278 case 2: 279 band_bottom = 76 * FREQ_MUL; break; 280 }; 281 282 /* Chan = [ Freq (Mhz) - Bottom of Band (MHz) ] / Spacing (kHz) */ 283 chan = (freq - band_bottom) / spacing; 284 285 return si470x_set_chan(radio, chan); 286 } 287 288 289 /* 290 * si470x_set_seek - set seek 291 */ 292 static int si470x_set_seek(struct si470x_device *radio, 293 unsigned int wrap_around, unsigned int seek_upward) 294 { 295 int retval = 0; 296 unsigned long timeout; 297 bool timed_out = 0; 298 299 /* start seeking */ 300 radio->registers[POWERCFG] |= POWERCFG_SEEK; 301 if (wrap_around == 1) 302 radio->registers[POWERCFG] &= ~POWERCFG_SKMODE; 303 else 304 radio->registers[POWERCFG] |= POWERCFG_SKMODE; 305 if (seek_upward == 1) 306 radio->registers[POWERCFG] |= POWERCFG_SEEKUP; 307 else 308 radio->registers[POWERCFG] &= ~POWERCFG_SEEKUP; 309 retval = si470x_set_register(radio, POWERCFG); 310 if (retval < 0) 311 goto done; 312 313 /* wait till seek operation has completed */ 314 timeout = jiffies + msecs_to_jiffies(seek_timeout); 315 do { 316 retval = si470x_get_register(radio, STATUSRSSI); 317 if (retval < 0) 318 goto stop; 319 timed_out = time_after(jiffies, timeout); 320 } while (((radio->registers[STATUSRSSI] & STATUSRSSI_STC) == 0) && 321 (!timed_out)); 322 if ((radio->registers[STATUSRSSI] & STATUSRSSI_STC) == 0) 323 dev_warn(&radio->videodev->dev, "seek does not complete\n"); 324 if (radio->registers[STATUSRSSI] & STATUSRSSI_SF) 325 dev_warn(&radio->videodev->dev, 326 "seek failed / band limit reached\n"); 327 if (timed_out) 328 dev_warn(&radio->videodev->dev, 329 "seek timed out after %u ms\n", seek_timeout); 330 331 stop: 332 /* stop seeking */ 333 radio->registers[POWERCFG] &= ~POWERCFG_SEEK; 334 retval = si470x_set_register(radio, POWERCFG); 335 336 done: 337 /* try again, if timed out */ 338 if ((retval == 0) && timed_out) 339 retval = -EAGAIN; 340 341 return retval; 342 } 343 344 345 /* 346 * si470x_start - switch on radio 347 */ 348 int si470x_start(struct si470x_device *radio) 349 { 350 int retval; 351 352 /* powercfg */ 353 radio->registers[POWERCFG] = 354 POWERCFG_DMUTE | POWERCFG_ENABLE | POWERCFG_RDSM; 355 retval = si470x_set_register(radio, POWERCFG); 356 if (retval < 0) 357 goto done; 358 359 /* sysconfig 1 */ 360 radio->registers[SYSCONFIG1] = SYSCONFIG1_DE; 361 retval = si470x_set_register(radio, SYSCONFIG1); 362 if (retval < 0) 363 goto done; 364 365 /* sysconfig 2 */ 366 radio->registers[SYSCONFIG2] = 367 (0x3f << 8) | /* SEEKTH */ 368 ((band << 6) & SYSCONFIG2_BAND) | /* BAND */ 369 ((space << 4) & SYSCONFIG2_SPACE) | /* SPACE */ 370 15; /* VOLUME (max) */ 371 retval = si470x_set_register(radio, SYSCONFIG2); 372 if (retval < 0) 373 goto done; 374 375 /* reset last channel */ 376 retval = si470x_set_chan(radio, 377 radio->registers[CHANNEL] & CHANNEL_CHAN); 378 379 done: 380 return retval; 381 } 382 383 384 /* 385 * si470x_stop - switch off radio 386 */ 387 int si470x_stop(struct si470x_device *radio) 388 { 389 int retval; 390 391 /* sysconfig 1 */ 392 radio->registers[SYSCONFIG1] &= ~SYSCONFIG1_RDS; 393 retval = si470x_set_register(radio, SYSCONFIG1); 394 if (retval < 0) 395 goto done; 396 397 /* powercfg */ 398 radio->registers[POWERCFG] &= ~POWERCFG_DMUTE; 399 /* POWERCFG_ENABLE has to automatically go low */ 400 radio->registers[POWERCFG] |= POWERCFG_ENABLE | POWERCFG_DISABLE; 401 retval = si470x_set_register(radio, POWERCFG); 402 403 done: 404 return retval; 405 } 406 407 408 /* 409 * si470x_rds_on - switch on rds reception 410 */ 411 int si470x_rds_on(struct si470x_device *radio) 412 { 413 int retval; 414 415 /* sysconfig 1 */ 416 mutex_lock(&radio->lock); 417 radio->registers[SYSCONFIG1] |= SYSCONFIG1_RDS; 418 retval = si470x_set_register(radio, SYSCONFIG1); 419 if (retval < 0) 420 radio->registers[SYSCONFIG1] &= ~SYSCONFIG1_RDS; 421 mutex_unlock(&radio->lock); 422 423 return retval; 424 } 425 426 427 428 /************************************************************************** 429 * Video4Linux Interface 430 **************************************************************************/ 431 432 /* 433 * si470x_vidioc_queryctrl - enumerate control items 434 */ 435 static int si470x_vidioc_queryctrl(struct file *file, void *priv, 436 struct v4l2_queryctrl *qc) 437 { 438 struct si470x_device *radio = video_drvdata(file); 439 int retval = -EINVAL; 440 441 /* abort if qc->id is below V4L2_CID_BASE */ 442 if (qc->id < V4L2_CID_BASE) 443 goto done; 444 445 /* search video control */ 446 switch (qc->id) { 447 case V4L2_CID_AUDIO_VOLUME: 448 return v4l2_ctrl_query_fill(qc, 0, 15, 1, 15); 449 case V4L2_CID_AUDIO_MUTE: 450 return v4l2_ctrl_query_fill(qc, 0, 1, 1, 1); 451 } 452 453 /* disable unsupported base controls */ 454 /* to satisfy kradio and such apps */ 455 if ((retval == -EINVAL) && (qc->id < V4L2_CID_LASTP1)) { 456 qc->flags = V4L2_CTRL_FLAG_DISABLED; 457 retval = 0; 458 } 459 460 done: 461 if (retval < 0) 462 dev_warn(&radio->videodev->dev, 463 "query controls failed with %d\n", retval); 464 return retval; 465 } 466 467 468 /* 469 * si470x_vidioc_g_ctrl - get the value of a control 470 */ 471 static int si470x_vidioc_g_ctrl(struct file *file, void *priv, 472 struct v4l2_control *ctrl) 473 { 474 struct si470x_device *radio = video_drvdata(file); 475 int retval = 0; 476 477 /* safety checks */ 478 retval = si470x_disconnect_check(radio); 479 if (retval) 480 goto done; 481 482 switch (ctrl->id) { 483 case V4L2_CID_AUDIO_VOLUME: 484 ctrl->value = radio->registers[SYSCONFIG2] & 485 SYSCONFIG2_VOLUME; 486 break; 487 case V4L2_CID_AUDIO_MUTE: 488 ctrl->value = ((radio->registers[POWERCFG] & 489 POWERCFG_DMUTE) == 0) ? 1 : 0; 490 break; 491 default: 492 retval = -EINVAL; 493 } 494 495 done: 496 if (retval < 0) 497 dev_warn(&radio->videodev->dev, 498 "get control failed with %d\n", retval); 499 return retval; 500 } 501 502 503 /* 504 * si470x_vidioc_s_ctrl - set the value of a control 505 */ 506 static int si470x_vidioc_s_ctrl(struct file *file, void *priv, 507 struct v4l2_control *ctrl) 508 { 509 struct si470x_device *radio = video_drvdata(file); 510 int retval = 0; 511 512 /* safety checks */ 513 retval = si470x_disconnect_check(radio); 514 if (retval) 515 goto done; 516 517 switch (ctrl->id) { 518 case V4L2_CID_AUDIO_VOLUME: 519 radio->registers[SYSCONFIG2] &= ~SYSCONFIG2_VOLUME; 520 radio->registers[SYSCONFIG2] |= ctrl->value; 521 retval = si470x_set_register(radio, SYSCONFIG2); 522 break; 523 case V4L2_CID_AUDIO_MUTE: 524 if (ctrl->value == 1) 525 radio->registers[POWERCFG] &= ~POWERCFG_DMUTE; 526 else 527 radio->registers[POWERCFG] |= POWERCFG_DMUTE; 528 retval = si470x_set_register(radio, POWERCFG); 529 break; 530 default: 531 retval = -EINVAL; 532 } 533 534 done: 535 if (retval < 0) 536 dev_warn(&radio->videodev->dev, 537 "set control failed with %d\n", retval); 538 return retval; 539 } 540 541 542 /* 543 * si470x_vidioc_g_audio - get audio attributes 544 */ 545 static int si470x_vidioc_g_audio(struct file *file, void *priv, 546 struct v4l2_audio *audio) 547 { 548 /* driver constants */ 549 audio->index = 0; 550 strcpy(audio->name, "Radio"); 551 audio->capability = V4L2_AUDCAP_STEREO; 552 audio->mode = 0; 553 554 return 0; 555 } 556 557 558 /* 559 * si470x_vidioc_g_tuner - get tuner attributes 560 */ 561 static int si470x_vidioc_g_tuner(struct file *file, void *priv, 562 struct v4l2_tuner *tuner) 563 { 564 struct si470x_device *radio = video_drvdata(file); 565 int retval = 0; 566 567 /* safety checks */ 568 retval = si470x_disconnect_check(radio); 569 if (retval) 570 goto done; 571 572 if (tuner->index != 0) { 573 retval = -EINVAL; 574 goto done; 575 } 576 577 retval = si470x_get_register(radio, STATUSRSSI); 578 if (retval < 0) 579 goto done; 580 581 /* driver constants */ 582 strcpy(tuner->name, "FM"); 583 tuner->type = V4L2_TUNER_RADIO; 584 #if defined(CONFIG_USB_SI470X) || defined(CONFIG_USB_SI470X_MODULE) 585 tuner->capability = V4L2_TUNER_CAP_LOW | V4L2_TUNER_CAP_STEREO | 586 V4L2_TUNER_CAP_RDS; 587 #else 588 tuner->capability = V4L2_TUNER_CAP_LOW | V4L2_TUNER_CAP_STEREO; 589 #endif 590 591 /* range limits */ 592 switch ((radio->registers[SYSCONFIG2] & SYSCONFIG2_BAND) >> 6) { 593 /* 0: 87.5 - 108 MHz (USA, Europe, default) */ 594 default: 595 tuner->rangelow = 87.5 * FREQ_MUL; 596 tuner->rangehigh = 108 * FREQ_MUL; 597 break; 598 /* 1: 76 - 108 MHz (Japan wide band) */ 599 case 1: 600 tuner->rangelow = 76 * FREQ_MUL; 601 tuner->rangehigh = 108 * FREQ_MUL; 602 break; 603 /* 2: 76 - 90 MHz (Japan) */ 604 case 2: 605 tuner->rangelow = 76 * FREQ_MUL; 606 tuner->rangehigh = 90 * FREQ_MUL; 607 break; 608 }; 609 610 /* stereo indicator == stereo (instead of mono) */ 611 if ((radio->registers[STATUSRSSI] & STATUSRSSI_ST) == 0) 612 tuner->rxsubchans = V4L2_TUNER_SUB_MONO; 613 else 614 tuner->rxsubchans = V4L2_TUNER_SUB_MONO | V4L2_TUNER_SUB_STEREO; 615 #if defined(CONFIG_USB_SI470X) || defined(CONFIG_USB_SI470X_MODULE) 616 /* If there is a reliable method of detecting an RDS channel, 617 then this code should check for that before setting this 618 RDS subchannel. */ 619 tuner->rxsubchans |= V4L2_TUNER_SUB_RDS; 620 #endif 621 622 /* mono/stereo selector */ 623 if ((radio->registers[POWERCFG] & POWERCFG_MONO) == 0) 624 tuner->audmode = V4L2_TUNER_MODE_STEREO; 625 else 626 tuner->audmode = V4L2_TUNER_MODE_MONO; 627 628 /* min is worst, max is best; signal:0..0xffff; rssi: 0..0xff */ 629 /* measured in units of db쨉V in 1 db increments (max at ~75 db쨉V) */ 630 tuner->signal = (radio->registers[STATUSRSSI] & STATUSRSSI_RSSI); 631 /* the ideal factor is 0xffff/75 = 873,8 */ 632 tuner->signal = (tuner->signal * 873) + (8 * tuner->signal / 10); 633 634 /* automatic frequency control: -1: freq to low, 1 freq to high */ 635 /* AFCRL does only indicate that freq. differs, not if too low/high */ 636 tuner->afc = (radio->registers[STATUSRSSI] & STATUSRSSI_AFCRL) ? 1 : 0; 637 638 done: 639 if (retval < 0) 640 dev_warn(&radio->videodev->dev, 641 "get tuner failed with %d\n", retval); 642 return retval; 643 } 644 645 646 /* 647 * si470x_vidioc_s_tuner - set tuner attributes 648 */ 649 static int si470x_vidioc_s_tuner(struct file *file, void *priv, 650 struct v4l2_tuner *tuner) 651 { 652 struct si470x_device *radio = video_drvdata(file); 653 int retval = -EINVAL; 654 655 /* safety checks */ 656 retval = si470x_disconnect_check(radio); 657 if (retval) 658 goto done; 659 660 if (tuner->index != 0) 661 goto done; 662 663 /* mono/stereo selector */ 664 switch (tuner->audmode) { 665 case V4L2_TUNER_MODE_MONO: 666 radio->registers[POWERCFG] |= POWERCFG_MONO; /* force mono */ 667 break; 668 case V4L2_TUNER_MODE_STEREO: 669 radio->registers[POWERCFG] &= ~POWERCFG_MONO; /* try stereo */ 670 break; 671 default: 672 goto done; 673 } 674 675 retval = si470x_set_register(radio, POWERCFG); 676 677 done: 678 if (retval < 0) 679 dev_warn(&radio->videodev->dev, 680 "set tuner failed with %d\n", retval); 681 return retval; 682 } 683 684 685 /* 686 * si470x_vidioc_g_frequency - get tuner or modulator radio frequency 687 */ 688 static int si470x_vidioc_g_frequency(struct file *file, void *priv, 689 struct v4l2_frequency *freq) 690 { 691 struct si470x_device *radio = video_drvdata(file); 692 int retval = 0; 693 694 /* safety checks */ 695 retval = si470x_disconnect_check(radio); 696 if (retval) 697 goto done; 698 699 if (freq->tuner != 0) { 700 retval = -EINVAL; 701 goto done; 702 } 703 704 freq->type = V4L2_TUNER_RADIO; 705 retval = si470x_get_freq(radio, &freq->frequency); 706 707 done: 708 if (retval < 0) 709 dev_warn(&radio->videodev->dev, 710 "get frequency failed with %d\n", retval); 711 return retval; 712 } 713 714 715 /* 716 * si470x_vidioc_s_frequency - set tuner or modulator radio frequency 717 */ 718 static int si470x_vidioc_s_frequency(struct file *file, void *priv, 719 struct v4l2_frequency *freq) 720 { 721 struct si470x_device *radio = video_drvdata(file); 722 int retval = 0; 723 724 /* safety checks */ 725 retval = si470x_disconnect_check(radio); 726 if (retval) 727 goto done; 728 729 if (freq->tuner != 0) { 730 retval = -EINVAL; 731 goto done; 732 } 733 734 retval = si470x_set_freq(radio, freq->frequency); 735 736 done: 737 if (retval < 0) 738 dev_warn(&radio->videodev->dev, 739 "set frequency failed with %d\n", retval); 740 return retval; 741 } 742 743 744 /* 745 * si470x_vidioc_s_hw_freq_seek - set hardware frequency seek 746 */ 747 static int si470x_vidioc_s_hw_freq_seek(struct file *file, void *priv, 748 struct v4l2_hw_freq_seek *seek) 749 { 750 struct si470x_device *radio = video_drvdata(file); 751 int retval = 0; 752 753 /* safety checks */ 754 retval = si470x_disconnect_check(radio); 755 if (retval) 756 goto done; 757 758 if (seek->tuner != 0) { 759 retval = -EINVAL; 760 goto done; 761 } 762 763 retval = si470x_set_seek(radio, seek->wrap_around, seek->seek_upward); 764 765 done: 766 if (retval < 0) 767 dev_warn(&radio->videodev->dev, 768 "set hardware frequency seek failed with %d\n", retval); 769 return retval; 770 } 771 772 773 /* 774 * si470x_ioctl_ops - video device ioctl operations 775 */ 776 static const struct v4l2_ioctl_ops si470x_ioctl_ops = { 777 .vidioc_querycap = si470x_vidioc_querycap, 778 .vidioc_queryctrl = si470x_vidioc_queryctrl, 779 .vidioc_g_ctrl = si470x_vidioc_g_ctrl, 780 .vidioc_s_ctrl = si470x_vidioc_s_ctrl, 781 .vidioc_g_audio = si470x_vidioc_g_audio, 782 .vidioc_g_tuner = si470x_vidioc_g_tuner, 783 .vidioc_s_tuner = si470x_vidioc_s_tuner, 784 .vidioc_g_frequency = si470x_vidioc_g_frequency, 785 .vidioc_s_frequency = si470x_vidioc_s_frequency, 786 .vidioc_s_hw_freq_seek = si470x_vidioc_s_hw_freq_seek, 787 }; 788 789 790 /* 791 * si470x_viddev_template - video device interface 792 */ 793 struct video_device si470x_viddev_template = { 794 .fops = &si470x_fops, 795 .name = DRIVER_NAME, 796 .release = video_device_release, 797 .ioctl_ops = &si470x_ioctl_ops, 798 }; 799