Commit | Line | Data |
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b09cd163 JS |
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 | ||
0830be3f JS |
177 | /* currently I2C driver only uses interrupt way to tune */ |
178 | if (radio->stci_enabled) { | |
179 | INIT_COMPLETION(radio->completion); | |
180 | ||
181 | /* wait till tune operation has completed */ | |
182 | retval = wait_for_completion_timeout(&radio->completion, | |
183 | msecs_to_jiffies(tune_timeout)); | |
184 | if (!retval) | |
185 | timed_out = true; | |
186 | } else { | |
187 | /* wait till tune operation has completed */ | |
188 | timeout = jiffies + msecs_to_jiffies(tune_timeout); | |
189 | do { | |
190 | retval = si470x_get_register(radio, STATUSRSSI); | |
191 | if (retval < 0) | |
192 | goto stop; | |
193 | timed_out = time_after(jiffies, timeout); | |
194 | } while (((radio->registers[STATUSRSSI] & STATUSRSSI_STC) == 0) | |
195 | && (!timed_out)); | |
196 | } | |
197 | ||
b09cd163 | 198 | if ((radio->registers[STATUSRSSI] & STATUSRSSI_STC) == 0) |
a9d6fd5e | 199 | dev_warn(&radio->videodev->dev, "tune does not complete\n"); |
b09cd163 | 200 | if (timed_out) |
a9d6fd5e JS |
201 | dev_warn(&radio->videodev->dev, |
202 | "tune timed out after %u ms\n", tune_timeout); | |
b09cd163 JS |
203 | |
204 | stop: | |
205 | /* stop tuning */ | |
206 | radio->registers[CHANNEL] &= ~CHANNEL_TUNE; | |
207 | retval = si470x_set_register(radio, CHANNEL); | |
208 | ||
209 | done: | |
210 | return retval; | |
211 | } | |
212 | ||
213 | ||
214 | /* | |
215 | * si470x_get_freq - get the frequency | |
216 | */ | |
217 | static int si470x_get_freq(struct si470x_device *radio, unsigned int *freq) | |
218 | { | |
219 | unsigned int spacing, band_bottom; | |
220 | unsigned short chan; | |
221 | int retval; | |
222 | ||
223 | /* Spacing (kHz) */ | |
224 | switch ((radio->registers[SYSCONFIG2] & SYSCONFIG2_SPACE) >> 4) { | |
225 | /* 0: 200 kHz (USA, Australia) */ | |
226 | case 0: | |
227 | spacing = 0.200 * FREQ_MUL; break; | |
228 | /* 1: 100 kHz (Europe, Japan) */ | |
229 | case 1: | |
230 | spacing = 0.100 * FREQ_MUL; break; | |
231 | /* 2: 50 kHz */ | |
232 | default: | |
233 | spacing = 0.050 * FREQ_MUL; break; | |
234 | }; | |
235 | ||
236 | /* Bottom of Band (MHz) */ | |
237 | switch ((radio->registers[SYSCONFIG2] & SYSCONFIG2_BAND) >> 6) { | |
238 | /* 0: 87.5 - 108 MHz (USA, Europe) */ | |
239 | case 0: | |
240 | band_bottom = 87.5 * FREQ_MUL; break; | |
241 | /* 1: 76 - 108 MHz (Japan wide band) */ | |
242 | default: | |
243 | band_bottom = 76 * FREQ_MUL; break; | |
244 | /* 2: 76 - 90 MHz (Japan) */ | |
245 | case 2: | |
246 | band_bottom = 76 * FREQ_MUL; break; | |
247 | }; | |
248 | ||
249 | /* read channel */ | |
250 | retval = si470x_get_register(radio, READCHAN); | |
251 | chan = radio->registers[READCHAN] & READCHAN_READCHAN; | |
252 | ||
253 | /* Frequency (MHz) = Spacing (kHz) x Channel + Bottom of Band (MHz) */ | |
254 | *freq = chan * spacing + band_bottom; | |
255 | ||
256 | return retval; | |
257 | } | |
258 | ||
259 | ||
260 | /* | |
261 | * si470x_set_freq - set the frequency | |
262 | */ | |
263 | int si470x_set_freq(struct si470x_device *radio, unsigned int freq) | |
264 | { | |
265 | unsigned int spacing, band_bottom; | |
266 | unsigned short chan; | |
267 | ||
268 | /* Spacing (kHz) */ | |
269 | switch ((radio->registers[SYSCONFIG2] & SYSCONFIG2_SPACE) >> 4) { | |
270 | /* 0: 200 kHz (USA, Australia) */ | |
271 | case 0: | |
272 | spacing = 0.200 * FREQ_MUL; break; | |
273 | /* 1: 100 kHz (Europe, Japan) */ | |
274 | case 1: | |
275 | spacing = 0.100 * FREQ_MUL; break; | |
276 | /* 2: 50 kHz */ | |
277 | default: | |
278 | spacing = 0.050 * FREQ_MUL; break; | |
279 | }; | |
280 | ||
281 | /* Bottom of Band (MHz) */ | |
282 | switch ((radio->registers[SYSCONFIG2] & SYSCONFIG2_BAND) >> 6) { | |
283 | /* 0: 87.5 - 108 MHz (USA, Europe) */ | |
284 | case 0: | |
285 | band_bottom = 87.5 * FREQ_MUL; break; | |
286 | /* 1: 76 - 108 MHz (Japan wide band) */ | |
287 | default: | |
288 | band_bottom = 76 * FREQ_MUL; break; | |
289 | /* 2: 76 - 90 MHz (Japan) */ | |
290 | case 2: | |
291 | band_bottom = 76 * FREQ_MUL; break; | |
292 | }; | |
293 | ||
294 | /* Chan = [ Freq (Mhz) - Bottom of Band (MHz) ] / Spacing (kHz) */ | |
295 | chan = (freq - band_bottom) / spacing; | |
296 | ||
297 | return si470x_set_chan(radio, chan); | |
298 | } | |
299 | ||
300 | ||
301 | /* | |
302 | * si470x_set_seek - set seek | |
303 | */ | |
304 | static int si470x_set_seek(struct si470x_device *radio, | |
305 | unsigned int wrap_around, unsigned int seek_upward) | |
306 | { | |
307 | int retval = 0; | |
308 | unsigned long timeout; | |
309 | bool timed_out = 0; | |
310 | ||
311 | /* start seeking */ | |
312 | radio->registers[POWERCFG] |= POWERCFG_SEEK; | |
313 | if (wrap_around == 1) | |
314 | radio->registers[POWERCFG] &= ~POWERCFG_SKMODE; | |
315 | else | |
316 | radio->registers[POWERCFG] |= POWERCFG_SKMODE; | |
317 | if (seek_upward == 1) | |
318 | radio->registers[POWERCFG] |= POWERCFG_SEEKUP; | |
319 | else | |
320 | radio->registers[POWERCFG] &= ~POWERCFG_SEEKUP; | |
321 | retval = si470x_set_register(radio, POWERCFG); | |
322 | if (retval < 0) | |
323 | goto done; | |
324 | ||
0830be3f JS |
325 | /* currently I2C driver only uses interrupt way to seek */ |
326 | if (radio->stci_enabled) { | |
327 | INIT_COMPLETION(radio->completion); | |
328 | ||
329 | /* wait till seek operation has completed */ | |
330 | retval = wait_for_completion_timeout(&radio->completion, | |
331 | msecs_to_jiffies(seek_timeout)); | |
332 | if (!retval) | |
333 | timed_out = true; | |
334 | } else { | |
335 | /* wait till seek operation has completed */ | |
336 | timeout = jiffies + msecs_to_jiffies(seek_timeout); | |
337 | do { | |
338 | retval = si470x_get_register(radio, STATUSRSSI); | |
339 | if (retval < 0) | |
340 | goto stop; | |
341 | timed_out = time_after(jiffies, timeout); | |
342 | } while (((radio->registers[STATUSRSSI] & STATUSRSSI_STC) == 0) | |
343 | && (!timed_out)); | |
344 | } | |
345 | ||
b09cd163 | 346 | if ((radio->registers[STATUSRSSI] & STATUSRSSI_STC) == 0) |
a9d6fd5e | 347 | dev_warn(&radio->videodev->dev, "seek does not complete\n"); |
b09cd163 | 348 | if (radio->registers[STATUSRSSI] & STATUSRSSI_SF) |
a9d6fd5e JS |
349 | dev_warn(&radio->videodev->dev, |
350 | "seek failed / band limit reached\n"); | |
b09cd163 | 351 | if (timed_out) |
a9d6fd5e JS |
352 | dev_warn(&radio->videodev->dev, |
353 | "seek timed out after %u ms\n", seek_timeout); | |
b09cd163 JS |
354 | |
355 | stop: | |
356 | /* stop seeking */ | |
357 | radio->registers[POWERCFG] &= ~POWERCFG_SEEK; | |
358 | retval = si470x_set_register(radio, POWERCFG); | |
359 | ||
360 | done: | |
361 | /* try again, if timed out */ | |
362 | if ((retval == 0) && timed_out) | |
363 | retval = -EAGAIN; | |
364 | ||
365 | return retval; | |
366 | } | |
367 | ||
368 | ||
369 | /* | |
370 | * si470x_start - switch on radio | |
371 | */ | |
372 | int si470x_start(struct si470x_device *radio) | |
373 | { | |
374 | int retval; | |
375 | ||
376 | /* powercfg */ | |
377 | radio->registers[POWERCFG] = | |
378 | POWERCFG_DMUTE | POWERCFG_ENABLE | POWERCFG_RDSM; | |
379 | retval = si470x_set_register(radio, POWERCFG); | |
380 | if (retval < 0) | |
381 | goto done; | |
382 | ||
383 | /* sysconfig 1 */ | |
131ddd1a TL |
384 | radio->registers[SYSCONFIG1] = |
385 | (de << 11) & SYSCONFIG1_DE; /* DE*/ | |
b09cd163 JS |
386 | retval = si470x_set_register(radio, SYSCONFIG1); |
387 | if (retval < 0) | |
388 | goto done; | |
389 | ||
390 | /* sysconfig 2 */ | |
391 | radio->registers[SYSCONFIG2] = | |
392 | (0x3f << 8) | /* SEEKTH */ | |
393 | ((band << 6) & SYSCONFIG2_BAND) | /* BAND */ | |
394 | ((space << 4) & SYSCONFIG2_SPACE) | /* SPACE */ | |
395 | 15; /* VOLUME (max) */ | |
396 | retval = si470x_set_register(radio, SYSCONFIG2); | |
397 | if (retval < 0) | |
398 | goto done; | |
399 | ||
400 | /* reset last channel */ | |
401 | retval = si470x_set_chan(radio, | |
402 | radio->registers[CHANNEL] & CHANNEL_CHAN); | |
403 | ||
404 | done: | |
405 | return retval; | |
406 | } | |
407 | ||
408 | ||
409 | /* | |
410 | * si470x_stop - switch off radio | |
411 | */ | |
412 | int si470x_stop(struct si470x_device *radio) | |
413 | { | |
414 | int retval; | |
415 | ||
416 | /* sysconfig 1 */ | |
417 | radio->registers[SYSCONFIG1] &= ~SYSCONFIG1_RDS; | |
418 | retval = si470x_set_register(radio, SYSCONFIG1); | |
419 | if (retval < 0) | |
420 | goto done; | |
421 | ||
422 | /* powercfg */ | |
423 | radio->registers[POWERCFG] &= ~POWERCFG_DMUTE; | |
424 | /* POWERCFG_ENABLE has to automatically go low */ | |
425 | radio->registers[POWERCFG] |= POWERCFG_ENABLE | POWERCFG_DISABLE; | |
426 | retval = si470x_set_register(radio, POWERCFG); | |
427 | ||
428 | done: | |
429 | return retval; | |
430 | } | |
431 | ||
432 | ||
433 | /* | |
434 | * si470x_rds_on - switch on rds reception | |
435 | */ | |
f2f8e850 | 436 | static int si470x_rds_on(struct si470x_device *radio) |
b09cd163 JS |
437 | { |
438 | int retval; | |
439 | ||
440 | /* sysconfig 1 */ | |
b09cd163 JS |
441 | radio->registers[SYSCONFIG1] |= SYSCONFIG1_RDS; |
442 | retval = si470x_set_register(radio, SYSCONFIG1); | |
443 | if (retval < 0) | |
444 | radio->registers[SYSCONFIG1] &= ~SYSCONFIG1_RDS; | |
b09cd163 JS |
445 | |
446 | return retval; | |
447 | } | |
448 | ||
449 | ||
450 | ||
1aa925c9 JS |
451 | /************************************************************************** |
452 | * File Operations Interface | |
453 | **************************************************************************/ | |
454 | ||
455 | /* | |
456 | * si470x_fops_read - read RDS data | |
457 | */ | |
458 | static ssize_t si470x_fops_read(struct file *file, char __user *buf, | |
459 | size_t count, loff_t *ppos) | |
460 | { | |
461 | struct si470x_device *radio = video_drvdata(file); | |
462 | int retval = 0; | |
463 | unsigned int block_count = 0; | |
464 | ||
465 | /* switch on rds reception */ | |
f2f8e850 | 466 | mutex_lock(&radio->lock); |
1aa925c9 JS |
467 | if ((radio->registers[SYSCONFIG1] & SYSCONFIG1_RDS) == 0) |
468 | si470x_rds_on(radio); | |
469 | ||
470 | /* block if no new data available */ | |
471 | while (radio->wr_index == radio->rd_index) { | |
472 | if (file->f_flags & O_NONBLOCK) { | |
473 | retval = -EWOULDBLOCK; | |
474 | goto done; | |
475 | } | |
476 | if (wait_event_interruptible(radio->read_queue, | |
477 | radio->wr_index != radio->rd_index) < 0) { | |
478 | retval = -EINTR; | |
479 | goto done; | |
480 | } | |
481 | } | |
482 | ||
483 | /* calculate block count from byte count */ | |
484 | count /= 3; | |
485 | ||
486 | /* copy RDS block out of internal buffer and to user buffer */ | |
1aa925c9 JS |
487 | while (block_count < count) { |
488 | if (radio->rd_index == radio->wr_index) | |
489 | break; | |
490 | ||
491 | /* always transfer rds complete blocks */ | |
492 | if (copy_to_user(buf, &radio->buffer[radio->rd_index], 3)) | |
493 | /* retval = -EFAULT; */ | |
494 | break; | |
495 | ||
496 | /* increment and wrap read pointer */ | |
497 | radio->rd_index += 3; | |
498 | if (radio->rd_index >= radio->buf_size) | |
499 | radio->rd_index = 0; | |
500 | ||
501 | /* increment counters */ | |
502 | block_count++; | |
503 | buf += 3; | |
504 | retval += 3; | |
505 | } | |
1aa925c9 JS |
506 | |
507 | done: | |
f2f8e850 | 508 | mutex_unlock(&radio->lock); |
1aa925c9 JS |
509 | return retval; |
510 | } | |
511 | ||
512 | ||
513 | /* | |
514 | * si470x_fops_poll - poll RDS data | |
515 | */ | |
516 | static unsigned int si470x_fops_poll(struct file *file, | |
517 | struct poll_table_struct *pts) | |
518 | { | |
519 | struct si470x_device *radio = video_drvdata(file); | |
520 | int retval = 0; | |
521 | ||
522 | /* switch on rds reception */ | |
f2f8e850 MCC |
523 | |
524 | mutex_lock(&radio->lock); | |
1aa925c9 JS |
525 | if ((radio->registers[SYSCONFIG1] & SYSCONFIG1_RDS) == 0) |
526 | si470x_rds_on(radio); | |
f2f8e850 | 527 | mutex_unlock(&radio->lock); |
1aa925c9 JS |
528 | |
529 | poll_wait(file, &radio->read_queue, pts); | |
530 | ||
531 | if (radio->rd_index != radio->wr_index) | |
532 | retval = POLLIN | POLLRDNORM; | |
533 | ||
534 | return retval; | |
535 | } | |
536 | ||
537 | ||
538 | /* | |
539 | * si470x_fops - file operations interface | |
540 | */ | |
541 | static const struct v4l2_file_operations si470x_fops = { | |
542 | .owner = THIS_MODULE, | |
543 | .read = si470x_fops_read, | |
544 | .poll = si470x_fops_poll, | |
f2f8e850 | 545 | .unlocked_ioctl = video_ioctl2, |
1aa925c9 JS |
546 | .open = si470x_fops_open, |
547 | .release = si470x_fops_release, | |
548 | }; | |
549 | ||
550 | ||
551 | ||
b09cd163 JS |
552 | /************************************************************************** |
553 | * Video4Linux Interface | |
554 | **************************************************************************/ | |
555 | ||
556 | /* | |
557 | * si470x_vidioc_queryctrl - enumerate control items | |
558 | */ | |
559 | static int si470x_vidioc_queryctrl(struct file *file, void *priv, | |
560 | struct v4l2_queryctrl *qc) | |
561 | { | |
a9d6fd5e | 562 | struct si470x_device *radio = video_drvdata(file); |
b09cd163 JS |
563 | int retval = -EINVAL; |
564 | ||
565 | /* abort if qc->id is below V4L2_CID_BASE */ | |
566 | if (qc->id < V4L2_CID_BASE) | |
567 | goto done; | |
568 | ||
569 | /* search video control */ | |
570 | switch (qc->id) { | |
571 | case V4L2_CID_AUDIO_VOLUME: | |
572 | return v4l2_ctrl_query_fill(qc, 0, 15, 1, 15); | |
573 | case V4L2_CID_AUDIO_MUTE: | |
574 | return v4l2_ctrl_query_fill(qc, 0, 1, 1, 1); | |
575 | } | |
576 | ||
577 | /* disable unsupported base controls */ | |
578 | /* to satisfy kradio and such apps */ | |
579 | if ((retval == -EINVAL) && (qc->id < V4L2_CID_LASTP1)) { | |
580 | qc->flags = V4L2_CTRL_FLAG_DISABLED; | |
581 | retval = 0; | |
582 | } | |
583 | ||
584 | done: | |
585 | if (retval < 0) | |
a9d6fd5e JS |
586 | dev_warn(&radio->videodev->dev, |
587 | "query controls failed with %d\n", retval); | |
b09cd163 JS |
588 | return retval; |
589 | } | |
590 | ||
591 | ||
592 | /* | |
593 | * si470x_vidioc_g_ctrl - get the value of a control | |
594 | */ | |
595 | static int si470x_vidioc_g_ctrl(struct file *file, void *priv, | |
596 | struct v4l2_control *ctrl) | |
597 | { | |
598 | struct si470x_device *radio = video_drvdata(file); | |
599 | int retval = 0; | |
600 | ||
f2f8e850 | 601 | mutex_lock(&radio->lock); |
b09cd163 | 602 | /* safety checks */ |
3c7cc8d5 JS |
603 | retval = si470x_disconnect_check(radio); |
604 | if (retval) | |
b09cd163 | 605 | goto done; |
b09cd163 JS |
606 | |
607 | switch (ctrl->id) { | |
608 | case V4L2_CID_AUDIO_VOLUME: | |
609 | ctrl->value = radio->registers[SYSCONFIG2] & | |
610 | SYSCONFIG2_VOLUME; | |
611 | break; | |
612 | case V4L2_CID_AUDIO_MUTE: | |
613 | ctrl->value = ((radio->registers[POWERCFG] & | |
614 | POWERCFG_DMUTE) == 0) ? 1 : 0; | |
615 | break; | |
616 | default: | |
617 | retval = -EINVAL; | |
618 | } | |
619 | ||
620 | done: | |
621 | if (retval < 0) | |
a9d6fd5e JS |
622 | dev_warn(&radio->videodev->dev, |
623 | "get control failed with %d\n", retval); | |
f2f8e850 MCC |
624 | |
625 | mutex_unlock(&radio->lock); | |
b09cd163 JS |
626 | return retval; |
627 | } | |
628 | ||
629 | ||
630 | /* | |
631 | * si470x_vidioc_s_ctrl - set the value of a control | |
632 | */ | |
633 | static int si470x_vidioc_s_ctrl(struct file *file, void *priv, | |
634 | struct v4l2_control *ctrl) | |
635 | { | |
636 | struct si470x_device *radio = video_drvdata(file); | |
637 | int retval = 0; | |
638 | ||
f2f8e850 | 639 | mutex_lock(&radio->lock); |
b09cd163 | 640 | /* safety checks */ |
3c7cc8d5 JS |
641 | retval = si470x_disconnect_check(radio); |
642 | if (retval) | |
b09cd163 | 643 | goto done; |
b09cd163 JS |
644 | |
645 | switch (ctrl->id) { | |
646 | case V4L2_CID_AUDIO_VOLUME: | |
647 | radio->registers[SYSCONFIG2] &= ~SYSCONFIG2_VOLUME; | |
648 | radio->registers[SYSCONFIG2] |= ctrl->value; | |
649 | retval = si470x_set_register(radio, SYSCONFIG2); | |
650 | break; | |
651 | case V4L2_CID_AUDIO_MUTE: | |
652 | if (ctrl->value == 1) | |
653 | radio->registers[POWERCFG] &= ~POWERCFG_DMUTE; | |
654 | else | |
655 | radio->registers[POWERCFG] |= POWERCFG_DMUTE; | |
656 | retval = si470x_set_register(radio, POWERCFG); | |
657 | break; | |
658 | default: | |
659 | retval = -EINVAL; | |
660 | } | |
661 | ||
662 | done: | |
663 | if (retval < 0) | |
a9d6fd5e JS |
664 | dev_warn(&radio->videodev->dev, |
665 | "set control failed with %d\n", retval); | |
f2f8e850 | 666 | mutex_unlock(&radio->lock); |
b09cd163 JS |
667 | return retval; |
668 | } | |
669 | ||
670 | ||
671 | /* | |
672 | * si470x_vidioc_g_audio - get audio attributes | |
673 | */ | |
674 | static int si470x_vidioc_g_audio(struct file *file, void *priv, | |
675 | struct v4l2_audio *audio) | |
676 | { | |
677 | /* driver constants */ | |
678 | audio->index = 0; | |
679 | strcpy(audio->name, "Radio"); | |
680 | audio->capability = V4L2_AUDCAP_STEREO; | |
681 | audio->mode = 0; | |
682 | ||
683 | return 0; | |
684 | } | |
685 | ||
686 | ||
687 | /* | |
688 | * si470x_vidioc_g_tuner - get tuner attributes | |
689 | */ | |
690 | static int si470x_vidioc_g_tuner(struct file *file, void *priv, | |
691 | struct v4l2_tuner *tuner) | |
692 | { | |
693 | struct si470x_device *radio = video_drvdata(file); | |
694 | int retval = 0; | |
695 | ||
f2f8e850 | 696 | mutex_lock(&radio->lock); |
b09cd163 | 697 | /* safety checks */ |
3c7cc8d5 JS |
698 | retval = si470x_disconnect_check(radio); |
699 | if (retval) | |
b09cd163 | 700 | goto done; |
3c7cc8d5 | 701 | |
b09cd163 JS |
702 | if (tuner->index != 0) { |
703 | retval = -EINVAL; | |
704 | goto done; | |
705 | } | |
706 | ||
707 | retval = si470x_get_register(radio, STATUSRSSI); | |
708 | if (retval < 0) | |
709 | goto done; | |
710 | ||
711 | /* driver constants */ | |
712 | strcpy(tuner->name, "FM"); | |
713 | tuner->type = V4L2_TUNER_RADIO; | |
714 | tuner->capability = V4L2_TUNER_CAP_LOW | V4L2_TUNER_CAP_STEREO | | |
cb0ed222 | 715 | V4L2_TUNER_CAP_RDS | V4L2_TUNER_CAP_RDS_BLOCK_IO; |
b09cd163 JS |
716 | |
717 | /* range limits */ | |
718 | switch ((radio->registers[SYSCONFIG2] & SYSCONFIG2_BAND) >> 6) { | |
719 | /* 0: 87.5 - 108 MHz (USA, Europe, default) */ | |
720 | default: | |
721 | tuner->rangelow = 87.5 * FREQ_MUL; | |
722 | tuner->rangehigh = 108 * FREQ_MUL; | |
723 | break; | |
724 | /* 1: 76 - 108 MHz (Japan wide band) */ | |
725 | case 1: | |
726 | tuner->rangelow = 76 * FREQ_MUL; | |
727 | tuner->rangehigh = 108 * FREQ_MUL; | |
728 | break; | |
729 | /* 2: 76 - 90 MHz (Japan) */ | |
730 | case 2: | |
731 | tuner->rangelow = 76 * FREQ_MUL; | |
732 | tuner->rangehigh = 90 * FREQ_MUL; | |
733 | break; | |
734 | }; | |
735 | ||
736 | /* stereo indicator == stereo (instead of mono) */ | |
737 | if ((radio->registers[STATUSRSSI] & STATUSRSSI_ST) == 0) | |
738 | tuner->rxsubchans = V4L2_TUNER_SUB_MONO; | |
739 | else | |
740 | tuner->rxsubchans = V4L2_TUNER_SUB_MONO | V4L2_TUNER_SUB_STEREO; | |
741 | /* If there is a reliable method of detecting an RDS channel, | |
742 | then this code should check for that before setting this | |
743 | RDS subchannel. */ | |
744 | tuner->rxsubchans |= V4L2_TUNER_SUB_RDS; | |
745 | ||
746 | /* mono/stereo selector */ | |
747 | if ((radio->registers[POWERCFG] & POWERCFG_MONO) == 0) | |
748 | tuner->audmode = V4L2_TUNER_MODE_STEREO; | |
749 | else | |
750 | tuner->audmode = V4L2_TUNER_MODE_MONO; | |
751 | ||
752 | /* min is worst, max is best; signal:0..0xffff; rssi: 0..0xff */ | |
144dcdce | 753 | /* measured in units of dbµV in 1 db increments (max at ~75 dbµV) */ |
b09cd163 JS |
754 | tuner->signal = (radio->registers[STATUSRSSI] & STATUSRSSI_RSSI); |
755 | /* the ideal factor is 0xffff/75 = 873,8 */ | |
756 | tuner->signal = (tuner->signal * 873) + (8 * tuner->signal / 10); | |
757 | ||
758 | /* automatic frequency control: -1: freq to low, 1 freq to high */ | |
759 | /* AFCRL does only indicate that freq. differs, not if too low/high */ | |
760 | tuner->afc = (radio->registers[STATUSRSSI] & STATUSRSSI_AFCRL) ? 1 : 0; | |
761 | ||
762 | done: | |
763 | if (retval < 0) | |
a9d6fd5e JS |
764 | dev_warn(&radio->videodev->dev, |
765 | "get tuner failed with %d\n", retval); | |
f2f8e850 | 766 | mutex_unlock(&radio->lock); |
b09cd163 JS |
767 | return retval; |
768 | } | |
769 | ||
770 | ||
771 | /* | |
772 | * si470x_vidioc_s_tuner - set tuner attributes | |
773 | */ | |
774 | static int si470x_vidioc_s_tuner(struct file *file, void *priv, | |
775 | struct v4l2_tuner *tuner) | |
776 | { | |
777 | struct si470x_device *radio = video_drvdata(file); | |
73c994e4 | 778 | int retval = 0; |
b09cd163 | 779 | |
f2f8e850 | 780 | mutex_lock(&radio->lock); |
b09cd163 | 781 | /* safety checks */ |
3c7cc8d5 JS |
782 | retval = si470x_disconnect_check(radio); |
783 | if (retval) | |
b09cd163 | 784 | goto done; |
3c7cc8d5 | 785 | |
b09cd163 JS |
786 | if (tuner->index != 0) |
787 | goto done; | |
788 | ||
789 | /* mono/stereo selector */ | |
790 | switch (tuner->audmode) { | |
791 | case V4L2_TUNER_MODE_MONO: | |
792 | radio->registers[POWERCFG] |= POWERCFG_MONO; /* force mono */ | |
793 | break; | |
794 | case V4L2_TUNER_MODE_STEREO: | |
795 | radio->registers[POWERCFG] &= ~POWERCFG_MONO; /* try stereo */ | |
796 | break; | |
797 | default: | |
798 | goto done; | |
799 | } | |
800 | ||
801 | retval = si470x_set_register(radio, POWERCFG); | |
802 | ||
803 | done: | |
804 | if (retval < 0) | |
a9d6fd5e JS |
805 | dev_warn(&radio->videodev->dev, |
806 | "set tuner failed with %d\n", retval); | |
f2f8e850 | 807 | mutex_unlock(&radio->lock); |
b09cd163 JS |
808 | return retval; |
809 | } | |
810 | ||
811 | ||
812 | /* | |
813 | * si470x_vidioc_g_frequency - get tuner or modulator radio frequency | |
814 | */ | |
815 | static int si470x_vidioc_g_frequency(struct file *file, void *priv, | |
816 | struct v4l2_frequency *freq) | |
817 | { | |
818 | struct si470x_device *radio = video_drvdata(file); | |
819 | int retval = 0; | |
820 | ||
821 | /* safety checks */ | |
f2f8e850 | 822 | mutex_lock(&radio->lock); |
3c7cc8d5 JS |
823 | retval = si470x_disconnect_check(radio); |
824 | if (retval) | |
b09cd163 | 825 | goto done; |
3c7cc8d5 | 826 | |
b09cd163 JS |
827 | if (freq->tuner != 0) { |
828 | retval = -EINVAL; | |
829 | goto done; | |
830 | } | |
831 | ||
832 | freq->type = V4L2_TUNER_RADIO; | |
833 | retval = si470x_get_freq(radio, &freq->frequency); | |
834 | ||
835 | done: | |
836 | if (retval < 0) | |
a9d6fd5e JS |
837 | dev_warn(&radio->videodev->dev, |
838 | "get frequency failed with %d\n", retval); | |
f2f8e850 | 839 | mutex_unlock(&radio->lock); |
b09cd163 JS |
840 | return retval; |
841 | } | |
842 | ||
843 | ||
844 | /* | |
845 | * si470x_vidioc_s_frequency - set tuner or modulator radio frequency | |
846 | */ | |
847 | static int si470x_vidioc_s_frequency(struct file *file, void *priv, | |
848 | struct v4l2_frequency *freq) | |
849 | { | |
850 | struct si470x_device *radio = video_drvdata(file); | |
851 | int retval = 0; | |
852 | ||
f2f8e850 | 853 | mutex_lock(&radio->lock); |
b09cd163 | 854 | /* safety checks */ |
3c7cc8d5 JS |
855 | retval = si470x_disconnect_check(radio); |
856 | if (retval) | |
b09cd163 | 857 | goto done; |
3c7cc8d5 | 858 | |
b09cd163 JS |
859 | if (freq->tuner != 0) { |
860 | retval = -EINVAL; | |
861 | goto done; | |
862 | } | |
863 | ||
864 | retval = si470x_set_freq(radio, freq->frequency); | |
865 | ||
866 | done: | |
867 | if (retval < 0) | |
a9d6fd5e JS |
868 | dev_warn(&radio->videodev->dev, |
869 | "set frequency failed with %d\n", retval); | |
f2f8e850 | 870 | mutex_unlock(&radio->lock); |
b09cd163 JS |
871 | return retval; |
872 | } | |
873 | ||
874 | ||
875 | /* | |
876 | * si470x_vidioc_s_hw_freq_seek - set hardware frequency seek | |
877 | */ | |
878 | static int si470x_vidioc_s_hw_freq_seek(struct file *file, void *priv, | |
879 | struct v4l2_hw_freq_seek *seek) | |
880 | { | |
881 | struct si470x_device *radio = video_drvdata(file); | |
882 | int retval = 0; | |
883 | ||
f2f8e850 | 884 | mutex_lock(&radio->lock); |
b09cd163 | 885 | /* safety checks */ |
3c7cc8d5 JS |
886 | retval = si470x_disconnect_check(radio); |
887 | if (retval) | |
b09cd163 | 888 | goto done; |
3c7cc8d5 | 889 | |
b09cd163 JS |
890 | if (seek->tuner != 0) { |
891 | retval = -EINVAL; | |
892 | goto done; | |
893 | } | |
894 | ||
895 | retval = si470x_set_seek(radio, seek->wrap_around, seek->seek_upward); | |
896 | ||
897 | done: | |
898 | if (retval < 0) | |
a9d6fd5e JS |
899 | dev_warn(&radio->videodev->dev, |
900 | "set hardware frequency seek failed with %d\n", retval); | |
f2f8e850 | 901 | mutex_unlock(&radio->lock); |
b09cd163 JS |
902 | return retval; |
903 | } | |
904 | ||
905 | ||
906 | /* | |
907 | * si470x_ioctl_ops - video device ioctl operations | |
908 | */ | |
909 | static const struct v4l2_ioctl_ops si470x_ioctl_ops = { | |
910 | .vidioc_querycap = si470x_vidioc_querycap, | |
911 | .vidioc_queryctrl = si470x_vidioc_queryctrl, | |
912 | .vidioc_g_ctrl = si470x_vidioc_g_ctrl, | |
913 | .vidioc_s_ctrl = si470x_vidioc_s_ctrl, | |
914 | .vidioc_g_audio = si470x_vidioc_g_audio, | |
915 | .vidioc_g_tuner = si470x_vidioc_g_tuner, | |
916 | .vidioc_s_tuner = si470x_vidioc_s_tuner, | |
917 | .vidioc_g_frequency = si470x_vidioc_g_frequency, | |
918 | .vidioc_s_frequency = si470x_vidioc_s_frequency, | |
919 | .vidioc_s_hw_freq_seek = si470x_vidioc_s_hw_freq_seek, | |
920 | }; | |
921 | ||
922 | ||
923 | /* | |
924 | * si470x_viddev_template - video device interface | |
925 | */ | |
926 | struct video_device si470x_viddev_template = { | |
927 | .fops = &si470x_fops, | |
928 | .name = DRIVER_NAME, | |
929 | .release = video_device_release, | |
930 | .ioctl_ops = &si470x_ioctl_ops, | |
931 | }; |