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of: MSI: Simplify irqdomain lookup
[linux/fpc-iii.git] / drivers / media / radio / tea575x.c
blob43d1ea53cb666ea8d21e7defe739140359d93e7f
1 /*
2 * ALSA driver for TEA5757/5759 Philips AM/FM radio tuner chips
3 *
4 * Copyright (c) 2004 Jaroslav Kysela <perex@perex.cz>
5 *
6 *
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License as published by
9 * the Free Software Foundation; either version 2 of the License, or
10 * (at your option) any later version.
11 *
12 * This program is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * GNU General Public License for more details.
16 *
17 * You should have received a copy of the GNU General Public License
18 * along with this program; if not, write to the Free Software
19 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
20 *
21 */
22
23 #include <linux/delay.h>
24 #include <linux/module.h>
25 #include <linux/init.h>
26 #include <linux/slab.h>
27 #include <linux/sched.h>
28 #include <asm/io.h>
29 #include <media/v4l2-device.h>
30 #include <media/v4l2-dev.h>
31 #include <media/v4l2-fh.h>
32 #include <media/v4l2-ioctl.h>
33 #include <media/v4l2-event.h>
34 #include <media/tea575x.h>
35
36 MODULE_AUTHOR("Jaroslav Kysela <perex@perex.cz>");
37 MODULE_DESCRIPTION("Routines for control of TEA5757/5759 Philips AM/FM radio tuner chips");
38 MODULE_LICENSE("GPL");
39
40 /*
41 * definitions
42 */
43
44 #define TEA575X_BIT_SEARCH (1<<24) /* 1 = search action, 0 = tuned */
45 #define TEA575X_BIT_UPDOWN (1<<23) /* 0 = search down, 1 = search up */
46 #define TEA575X_BIT_MONO (1<<22) /* 0 = stereo, 1 = mono */
47 #define TEA575X_BIT_BAND_MASK (3<<20)
48 #define TEA575X_BIT_BAND_FM (0<<20)
49 #define TEA575X_BIT_BAND_MW (1<<20)
50 #define TEA575X_BIT_BAND_LW (2<<20)
51 #define TEA575X_BIT_BAND_SW (3<<20)
52 #define TEA575X_BIT_PORT_0 (1<<19) /* user bit */
53 #define TEA575X_BIT_PORT_1 (1<<18) /* user bit */
54 #define TEA575X_BIT_SEARCH_MASK (3<<16) /* search level */
55 #define TEA575X_BIT_SEARCH_5_28 (0<<16) /* FM >5uV, AM >28uV */
56 #define TEA575X_BIT_SEARCH_10_40 (1<<16) /* FM >10uV, AM > 40uV */
57 #define TEA575X_BIT_SEARCH_30_63 (2<<16) /* FM >30uV, AM > 63uV */
58 #define TEA575X_BIT_SEARCH_150_1000 (3<<16) /* FM > 150uV, AM > 1000uV */
59 #define TEA575X_BIT_DUMMY (1<<15) /* buffer */
60 #define TEA575X_BIT_FREQ_MASK 0x7fff
61
62 enum { BAND_FM, BAND_FM_JAPAN, BAND_AM };
63
64 static const struct v4l2_frequency_band bands[] = {
65 {
66 .type = V4L2_TUNER_RADIO,
67 .index = 0,
68 .capability = V4L2_TUNER_CAP_LOW | V4L2_TUNER_CAP_STEREO |
69 V4L2_TUNER_CAP_FREQ_BANDS,
70 .rangelow = 87500 * 16,
71 .rangehigh = 108000 * 16,
72 .modulation = V4L2_BAND_MODULATION_FM,
73 },
74 {
75 .type = V4L2_TUNER_RADIO,
76 .index = 0,
77 .capability = V4L2_TUNER_CAP_LOW | V4L2_TUNER_CAP_STEREO |
78 V4L2_TUNER_CAP_FREQ_BANDS,
79 .rangelow = 76000 * 16,
80 .rangehigh = 91000 * 16,
81 .modulation = V4L2_BAND_MODULATION_FM,
82 },
83 {
84 .type = V4L2_TUNER_RADIO,
85 .index = 1,
86 .capability = V4L2_TUNER_CAP_LOW | V4L2_TUNER_CAP_FREQ_BANDS,
87 .rangelow = 530 * 16,
88 .rangehigh = 1710 * 16,
89 .modulation = V4L2_BAND_MODULATION_AM,
90 },
91 };
92
93 /*
94 * lowlevel part
95 */
96
97 static void snd_tea575x_write(struct snd_tea575x *tea, unsigned int val)
98 {
99 u16 l;
100 u8 data;
101
102 if (tea->ops->write_val)
103 return tea->ops->write_val(tea, val);
104
105 tea->ops->set_direction(tea, 1);
106 udelay(16);
107
108 for (l = 25; l > 0; l--) {
109 data = (val >> 24) & TEA575X_DATA;
110 val <<= 1; /* shift data */
111 tea->ops->set_pins(tea, data | TEA575X_WREN);
112 udelay(2);
113 tea->ops->set_pins(tea, data | TEA575X_WREN | TEA575X_CLK);
114 udelay(2);
115 tea->ops->set_pins(tea, data | TEA575X_WREN);
116 udelay(2);
117 }
118
119 if (!tea->mute)
120 tea->ops->set_pins(tea, 0);
121 }
122
123 static u32 snd_tea575x_read(struct snd_tea575x *tea)
124 {
125 u16 l, rdata;
126 u32 data = 0;
127
128 if (tea->ops->read_val)
129 return tea->ops->read_val(tea);
130
131 tea->ops->set_direction(tea, 0);
132 tea->ops->set_pins(tea, 0);
133 udelay(16);
134
135 for (l = 24; l--;) {
136 tea->ops->set_pins(tea, TEA575X_CLK);
137 udelay(2);
138 if (!l)
139 tea->tuned = tea->ops->get_pins(tea) & TEA575X_MOST ? 0 : 1;
140 tea->ops->set_pins(tea, 0);
141 udelay(2);
142 data <<= 1; /* shift data */
143 rdata = tea->ops->get_pins(tea);
144 if (!l)
145 tea->stereo = (rdata & TEA575X_MOST) ? 0 : 1;
146 if (rdata & TEA575X_DATA)
147 data++;
148 udelay(2);
149 }
150
151 if (tea->mute)
152 tea->ops->set_pins(tea, TEA575X_WREN);
153
154 return data;
155 }
156
157 static u32 snd_tea575x_val_to_freq(struct snd_tea575x *tea, u32 val)
158 {
159 u32 freq = val & TEA575X_BIT_FREQ_MASK;
160
161 if (freq == 0)
162 return freq;
163
164 switch (tea->band) {
165 case BAND_FM:
166 /* freq *= 12.5 */
167 freq *= 125;
168 freq /= 10;
169 /* crystal fixup */
170 freq -= TEA575X_FMIF;
171 break;
172 case BAND_FM_JAPAN:
173 /* freq *= 12.5 */
174 freq *= 125;
175 freq /= 10;
176 /* crystal fixup */
177 freq += TEA575X_FMIF;
178 break;
179 case BAND_AM:
180 /* crystal fixup */
181 freq -= TEA575X_AMIF;
182 break;
183 }
184
185 return clamp(freq * 16, bands[tea->band].rangelow,
186 bands[tea->band].rangehigh); /* from kHz */
187 }
188
189 static u32 snd_tea575x_get_freq(struct snd_tea575x *tea)
190 {
191 return snd_tea575x_val_to_freq(tea, snd_tea575x_read(tea));
192 }
193
194 void snd_tea575x_set_freq(struct snd_tea575x *tea)
195 {
196 u32 freq = tea->freq / 16; /* to kHz */
197 u32 band = 0;
198
199 switch (tea->band) {
200 case BAND_FM:
201 band = TEA575X_BIT_BAND_FM;
202 /* crystal fixup */
203 freq += TEA575X_FMIF;
204 /* freq /= 12.5 */
205 freq *= 10;
206 freq /= 125;
207 break;
208 case BAND_FM_JAPAN:
209 band = TEA575X_BIT_BAND_FM;
210 /* crystal fixup */
211 freq -= TEA575X_FMIF;
212 /* freq /= 12.5 */
213 freq *= 10;
214 freq /= 125;
215 break;
216 case BAND_AM:
217 band = TEA575X_BIT_BAND_MW;
218 /* crystal fixup */
219 freq += TEA575X_AMIF;
220 break;
221 }
222
223 tea->val &= ~(TEA575X_BIT_FREQ_MASK | TEA575X_BIT_BAND_MASK);
224 tea->val |= band;
225 tea->val |= freq & TEA575X_BIT_FREQ_MASK;
226 snd_tea575x_write(tea, tea->val);
227 tea->freq = snd_tea575x_val_to_freq(tea, tea->val);
228 }
229
230 /*
231 * Linux Video interface
232 */
233
234 static int vidioc_querycap(struct file *file, void *priv,
235 struct v4l2_capability *v)
236 {
237 struct snd_tea575x *tea = video_drvdata(file);
238
239 strlcpy(v->driver, tea->v4l2_dev->name, sizeof(v->driver));
240 strlcpy(v->card, tea->card, sizeof(v->card));
241 strlcat(v->card, tea->tea5759 ? " TEA5759" : " TEA5757", sizeof(v->card));
242 strlcpy(v->bus_info, tea->bus_info, sizeof(v->bus_info));
243 v->device_caps = V4L2_CAP_TUNER | V4L2_CAP_RADIO;
244 if (!tea->cannot_read_data)
245 v->device_caps |= V4L2_CAP_HW_FREQ_SEEK;
246 v->capabilities = v->device_caps | V4L2_CAP_DEVICE_CAPS;
247 return 0;
248 }
249
250 int snd_tea575x_enum_freq_bands(struct snd_tea575x *tea,
251 struct v4l2_frequency_band *band)
252 {
253 int index;
254
255 if (band->tuner != 0)
256 return -EINVAL;
257
258 switch (band->index) {
259 case 0:
260 if (tea->tea5759)
261 index = BAND_FM_JAPAN;
262 else
263 index = BAND_FM;
264 break;
265 case 1:
266 if (tea->has_am) {
267 index = BAND_AM;
268 break;
269 }
270 /* Fall through */
271 default:
272 return -EINVAL;
273 }
274
275 *band = bands[index];
276 if (!tea->cannot_read_data)
277 band->capability |= V4L2_TUNER_CAP_HWSEEK_BOUNDED;
278
279 return 0;
280 }
281 EXPORT_SYMBOL(snd_tea575x_enum_freq_bands);
282
283 static int vidioc_enum_freq_bands(struct file *file, void *priv,
284 struct v4l2_frequency_band *band)
285 {
286 struct snd_tea575x *tea = video_drvdata(file);
287
288 return snd_tea575x_enum_freq_bands(tea, band);
289 }
290
291 int snd_tea575x_g_tuner(struct snd_tea575x *tea, struct v4l2_tuner *v)
292 {
293 struct v4l2_frequency_band band_fm = { 0, };
294
295 if (v->index > 0)
296 return -EINVAL;
297
298 snd_tea575x_read(tea);
299 snd_tea575x_enum_freq_bands(tea, &band_fm);
300
301 memset(v, 0, sizeof(*v));
302 strlcpy(v->name, tea->has_am ? "FM/AM" : "FM", sizeof(v->name));
303 v->type = V4L2_TUNER_RADIO;
304 v->capability = band_fm.capability;
305 v->rangelow = tea->has_am ? bands[BAND_AM].rangelow : band_fm.rangelow;
306 v->rangehigh = band_fm.rangehigh;
307 v->rxsubchans = tea->stereo ? V4L2_TUNER_SUB_STEREO : V4L2_TUNER_SUB_MONO;
308 v->audmode = (tea->val & TEA575X_BIT_MONO) ?
309 V4L2_TUNER_MODE_MONO : V4L2_TUNER_MODE_STEREO;
310 v->signal = tea->tuned ? 0xffff : 0;
311 return 0;
312 }
313 EXPORT_SYMBOL(snd_tea575x_g_tuner);
314
315 static int vidioc_g_tuner(struct file *file, void *priv,
316 struct v4l2_tuner *v)
317 {
318 struct snd_tea575x *tea = video_drvdata(file);
319
320 return snd_tea575x_g_tuner(tea, v);
321 }
322
323 static int vidioc_s_tuner(struct file *file, void *priv,
324 const struct v4l2_tuner *v)
325 {
326 struct snd_tea575x *tea = video_drvdata(file);
327 u32 orig_val = tea->val;
328
329 if (v->index)
330 return -EINVAL;
331 tea->val &= ~TEA575X_BIT_MONO;
332 if (v->audmode == V4L2_TUNER_MODE_MONO)
333 tea->val |= TEA575X_BIT_MONO;
334 /* Only apply changes if currently tuning FM */
335 if (tea->band != BAND_AM && tea->val != orig_val)
336 snd_tea575x_set_freq(tea);
337
338 return 0;
339 }
340
341 static int vidioc_g_frequency(struct file *file, void *priv,
342 struct v4l2_frequency *f)
343 {
344 struct snd_tea575x *tea = video_drvdata(file);
345
346 if (f->tuner != 0)
347 return -EINVAL;
348 f->type = V4L2_TUNER_RADIO;
349 f->frequency = tea->freq;
350 return 0;
351 }
352
353 static int vidioc_s_frequency(struct file *file, void *priv,
354 const struct v4l2_frequency *f)
355 {
356 struct snd_tea575x *tea = video_drvdata(file);
357
358 if (f->tuner != 0 || f->type != V4L2_TUNER_RADIO)
359 return -EINVAL;
360
361 if (tea->has_am && f->frequency < (20000 * 16))
362 tea->band = BAND_AM;
363 else if (tea->tea5759)
364 tea->band = BAND_FM_JAPAN;
365 else
366 tea->band = BAND_FM;
367
368 tea->freq = clamp_t(u32, f->frequency, bands[tea->band].rangelow,
369 bands[tea->band].rangehigh);
370 snd_tea575x_set_freq(tea);
371 return 0;
372 }
373
374 int snd_tea575x_s_hw_freq_seek(struct file *file, struct snd_tea575x *tea,
375 const struct v4l2_hw_freq_seek *a)
376 {
377 unsigned long timeout;
378 int i, spacing;
379
380 if (tea->cannot_read_data)
381 return -ENOTTY;
382 if (a->tuner || a->wrap_around)
383 return -EINVAL;
384
385 if (file->f_flags & O_NONBLOCK)
386 return -EWOULDBLOCK;
387
388 if (a->rangelow || a->rangehigh) {
389 for (i = 0; i < ARRAY_SIZE(bands); i++) {
390 if ((i == BAND_FM && tea->tea5759) ||
391 (i == BAND_FM_JAPAN && !tea->tea5759) ||
392 (i == BAND_AM && !tea->has_am))
393 continue;
394 if (bands[i].rangelow == a->rangelow &&
395 bands[i].rangehigh == a->rangehigh)
396 break;
397 }
398 if (i == ARRAY_SIZE(bands))
399 return -EINVAL; /* No matching band found */
400 if (i != tea->band) {
401 tea->band = i;
402 tea->freq = clamp(tea->freq, bands[i].rangelow,
403 bands[i].rangehigh);
404 snd_tea575x_set_freq(tea);
405 }
406 }
407
408 spacing = (tea->band == BAND_AM) ? 5 : 50; /* kHz */
409
410 /* clear the frequency, HW will fill it in */
411 tea->val &= ~TEA575X_BIT_FREQ_MASK;
412 tea->val |= TEA575X_BIT_SEARCH;
413 if (a->seek_upward)
414 tea->val |= TEA575X_BIT_UPDOWN;
415 else
416 tea->val &= ~TEA575X_BIT_UPDOWN;
417 snd_tea575x_write(tea, tea->val);
418 timeout = jiffies + msecs_to_jiffies(10000);
419 for (;;) {
420 if (time_after(jiffies, timeout))
421 break;
422 if (schedule_timeout_interruptible(msecs_to_jiffies(10))) {
423 /* some signal arrived, stop search */
424 tea->val &= ~TEA575X_BIT_SEARCH;
425 snd_tea575x_set_freq(tea);
426 return -ERESTARTSYS;
427 }
428 if (!(snd_tea575x_read(tea) & TEA575X_BIT_SEARCH)) {
429 u32 freq;
430
431 /* Found a frequency, wait until it can be read */
432 for (i = 0; i < 100; i++) {
433 msleep(10);
434 freq = snd_tea575x_get_freq(tea);
435 if (freq) /* available */
436 break;
437 }
438 if (freq == 0) /* shouldn't happen */
439 break;
440 /*
441 * if we moved by less than the spacing, or in the
442 * wrong direction, continue seeking
443 */
444 if (abs(tea->freq - freq) < 16 * spacing ||
445 (a->seek_upward && freq < tea->freq) ||
446 (!a->seek_upward && freq > tea->freq)) {
447 snd_tea575x_write(tea, tea->val);
448 continue;
449 }
450 tea->freq = freq;
451 tea->val &= ~TEA575X_BIT_SEARCH;
452 return 0;
453 }
454 }
455 tea->val &= ~TEA575X_BIT_SEARCH;
456 snd_tea575x_set_freq(tea);
457 return -ENODATA;
458 }
459 EXPORT_SYMBOL(snd_tea575x_s_hw_freq_seek);
460
461 static int vidioc_s_hw_freq_seek(struct file *file, void *fh,
462 const struct v4l2_hw_freq_seek *a)
463 {
464 struct snd_tea575x *tea = video_drvdata(file);
465
466 return snd_tea575x_s_hw_freq_seek(file, tea, a);
467 }
468
469 static int tea575x_s_ctrl(struct v4l2_ctrl *ctrl)
470 {
471 struct snd_tea575x *tea = container_of(ctrl->handler, struct snd_tea575x, ctrl_handler);
472
473 switch (ctrl->id) {
474 case V4L2_CID_AUDIO_MUTE:
475 tea->mute = ctrl->val;
476 snd_tea575x_set_freq(tea);
477 return 0;
478 }
479
480 return -EINVAL;
481 }
482
483 static const struct v4l2_file_operations tea575x_fops = {
484 .unlocked_ioctl = video_ioctl2,
485 .open = v4l2_fh_open,
486 .release = v4l2_fh_release,
487 .poll = v4l2_ctrl_poll,
488 };
489
490 static const struct v4l2_ioctl_ops tea575x_ioctl_ops = {
491 .vidioc_querycap = vidioc_querycap,
492 .vidioc_g_tuner = vidioc_g_tuner,
493 .vidioc_s_tuner = vidioc_s_tuner,
494 .vidioc_g_frequency = vidioc_g_frequency,
495 .vidioc_s_frequency = vidioc_s_frequency,
496 .vidioc_s_hw_freq_seek = vidioc_s_hw_freq_seek,
497 .vidioc_enum_freq_bands = vidioc_enum_freq_bands,
498 .vidioc_log_status = v4l2_ctrl_log_status,
499 .vidioc_subscribe_event = v4l2_ctrl_subscribe_event,
500 .vidioc_unsubscribe_event = v4l2_event_unsubscribe,
501 };
502
503 static const struct video_device tea575x_radio = {
504 .ioctl_ops = &tea575x_ioctl_ops,
505 .release = video_device_release_empty,
506 };
507
508 static const struct v4l2_ctrl_ops tea575x_ctrl_ops = {
509 .s_ctrl = tea575x_s_ctrl,
510 };
511
512
513 int snd_tea575x_hw_init(struct snd_tea575x *tea)
514 {
515 tea->mute = true;
516
517 /* Not all devices can or know how to read the data back.
518 Such devices can set cannot_read_data to true. */
519 if (!tea->cannot_read_data) {
520 snd_tea575x_write(tea, 0x55AA);
521 if (snd_tea575x_read(tea) != 0x55AA)
522 return -ENODEV;
523 }
524
525 tea->val = TEA575X_BIT_BAND_FM | TEA575X_BIT_SEARCH_5_28;
526 tea->freq = 90500 * 16; /* 90.5Mhz default */
527 snd_tea575x_set_freq(tea);
528
529 return 0;
530 }
531 EXPORT_SYMBOL(snd_tea575x_hw_init);
532
533 int snd_tea575x_init(struct snd_tea575x *tea, struct module *owner)
534 {
535 int retval = snd_tea575x_hw_init(tea);
536
537 if (retval)
538 return retval;
539
540 tea->vd = tea575x_radio;
541 video_set_drvdata(&tea->vd, tea);
542 mutex_init(&tea->mutex);
543 strlcpy(tea->vd.name, tea->v4l2_dev->name, sizeof(tea->vd.name));
544 tea->vd.lock = &tea->mutex;
545 tea->vd.v4l2_dev = tea->v4l2_dev;
546 tea->fops = tea575x_fops;
547 tea->fops.owner = owner;
548 tea->vd.fops = &tea->fops;
549 /* disable hw_freq_seek if we can't use it */
550 if (tea->cannot_read_data)
551 v4l2_disable_ioctl(&tea->vd, VIDIOC_S_HW_FREQ_SEEK);
552
553 if (!tea->cannot_mute) {
554 tea->vd.ctrl_handler = &tea->ctrl_handler;
555 v4l2_ctrl_handler_init(&tea->ctrl_handler, 1);
556 v4l2_ctrl_new_std(&tea->ctrl_handler, &tea575x_ctrl_ops,
557 V4L2_CID_AUDIO_MUTE, 0, 1, 1, 1);
558 retval = tea->ctrl_handler.error;
559 if (retval) {
560 v4l2_err(tea->v4l2_dev, "can't initialize controls\n");
561 v4l2_ctrl_handler_free(&tea->ctrl_handler);
562 return retval;
563 }
564
565 if (tea->ext_init) {
566 retval = tea->ext_init(tea);
567 if (retval) {
568 v4l2_ctrl_handler_free(&tea->ctrl_handler);
569 return retval;
570 }
571 }
572
573 v4l2_ctrl_handler_setup(&tea->ctrl_handler);
574 }
575
576 retval = video_register_device(&tea->vd, VFL_TYPE_RADIO, tea->radio_nr);
577 if (retval) {
578 v4l2_err(tea->v4l2_dev, "can't register video device!\n");
579 v4l2_ctrl_handler_free(tea->vd.ctrl_handler);
580 return retval;
581 }
582
583 return 0;
584 }
585
586 void snd_tea575x_exit(struct snd_tea575x *tea)
587 {
588 video_unregister_device(&tea->vd);
589 v4l2_ctrl_handler_free(tea->vd.ctrl_handler);
590 }
591
592 static int __init alsa_tea575x_module_init(void)
593 {
594 return 0;
595 }
596
597 static void __exit alsa_tea575x_module_exit(void)
598 {
599 }
600
601 module_init(alsa_tea575x_module_init)
602 module_exit(alsa_tea575x_module_exit)
603
604 EXPORT_SYMBOL(snd_tea575x_init);
605 EXPORT_SYMBOL(snd_tea575x_exit);
606 EXPORT_SYMBOL(snd_tea575x_set_freq);
Linux with added FPC-III support