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23#include <linux/init.h>
24#include <linux/pci.h>
25#include <linux/dma-mapping.h>
26#include <linux/slab.h>
27#include <linux/interrupt.h>
28#include <linux/delay.h>
29#include <linux/io.h>
30#include <linux/module.h>
31#include <sound/core.h>
32#include <sound/initval.h>
33#include <sound/pcm.h>
34#include <sound/pcm_params.h>
35#include <sound/control.h>
36
37#include "saa7146.h"
38#include "aw2-saa7146.h"
39
40MODULE_AUTHOR("Cedric Bregardis <cedric.bregardis@free.fr>, "
41 "Jean-Christian Hassler <jhassler@free.fr>");
42MODULE_DESCRIPTION("Emagic Audiowerk 2 sound driver");
43MODULE_LICENSE("GPL");
44
45
46
47
48#define CTL_ROUTE_ANALOG 0
49#define CTL_ROUTE_DIGITAL 1
50
51
52
53
54
55static struct snd_pcm_hardware snd_aw2_playback_hw = {
56 .info = (SNDRV_PCM_INFO_MMAP |
57 SNDRV_PCM_INFO_INTERLEAVED |
58 SNDRV_PCM_INFO_BLOCK_TRANSFER | SNDRV_PCM_INFO_MMAP_VALID),
59 .formats = SNDRV_PCM_FMTBIT_S16_LE,
60 .rates = SNDRV_PCM_RATE_44100,
61 .rate_min = 44100,
62 .rate_max = 44100,
63 .channels_min = 2,
64 .channels_max = 4,
65 .buffer_bytes_max = 32768,
66 .period_bytes_min = 4096,
67 .period_bytes_max = 32768,
68 .periods_min = 1,
69 .periods_max = 1024,
70};
71
72static struct snd_pcm_hardware snd_aw2_capture_hw = {
73 .info = (SNDRV_PCM_INFO_MMAP |
74 SNDRV_PCM_INFO_INTERLEAVED |
75 SNDRV_PCM_INFO_BLOCK_TRANSFER | SNDRV_PCM_INFO_MMAP_VALID),
76 .formats = SNDRV_PCM_FMTBIT_S16_LE,
77 .rates = SNDRV_PCM_RATE_44100,
78 .rate_min = 44100,
79 .rate_max = 44100,
80 .channels_min = 2,
81 .channels_max = 2,
82 .buffer_bytes_max = 32768,
83 .period_bytes_min = 4096,
84 .period_bytes_max = 32768,
85 .periods_min = 1,
86 .periods_max = 1024,
87};
88
89struct aw2_pcm_device {
90 struct snd_pcm *pcm;
91 unsigned int stream_number;
92 struct aw2 *chip;
93};
94
95struct aw2 {
96 struct snd_aw2_saa7146 saa7146;
97
98 struct pci_dev *pci;
99 int irq;
100 spinlock_t reg_lock;
101 struct mutex mtx;
102
103 unsigned long iobase_phys;
104 void __iomem *iobase_virt;
105
106 struct snd_card *card;
107
108 struct aw2_pcm_device device_playback[NB_STREAM_PLAYBACK];
109 struct aw2_pcm_device device_capture[NB_STREAM_CAPTURE];
110};
111
112
113
114
115static int snd_aw2_dev_free(struct snd_device *device);
116static int snd_aw2_create(struct snd_card *card,
117 struct pci_dev *pci, struct aw2 **rchip);
118static int snd_aw2_probe(struct pci_dev *pci,
119 const struct pci_device_id *pci_id);
120static void snd_aw2_remove(struct pci_dev *pci);
121static int snd_aw2_pcm_playback_open(struct snd_pcm_substream *substream);
122static int snd_aw2_pcm_playback_close(struct snd_pcm_substream *substream);
123static int snd_aw2_pcm_capture_open(struct snd_pcm_substream *substream);
124static int snd_aw2_pcm_capture_close(struct snd_pcm_substream *substream);
125static int snd_aw2_pcm_hw_params(struct snd_pcm_substream *substream,
126 struct snd_pcm_hw_params *hw_params);
127static int snd_aw2_pcm_hw_free(struct snd_pcm_substream *substream);
128static int snd_aw2_pcm_prepare_playback(struct snd_pcm_substream *substream);
129static int snd_aw2_pcm_prepare_capture(struct snd_pcm_substream *substream);
130static int snd_aw2_pcm_trigger_playback(struct snd_pcm_substream *substream,
131 int cmd);
132static int snd_aw2_pcm_trigger_capture(struct snd_pcm_substream *substream,
133 int cmd);
134static snd_pcm_uframes_t snd_aw2_pcm_pointer_playback(struct snd_pcm_substream
135 *substream);
136static snd_pcm_uframes_t snd_aw2_pcm_pointer_capture(struct snd_pcm_substream
137 *substream);
138static int snd_aw2_new_pcm(struct aw2 *chip);
139
140static int snd_aw2_control_switch_capture_info(struct snd_kcontrol *kcontrol,
141 struct snd_ctl_elem_info *uinfo);
142static int snd_aw2_control_switch_capture_get(struct snd_kcontrol *kcontrol,
143 struct snd_ctl_elem_value
144 *ucontrol);
145static int snd_aw2_control_switch_capture_put(struct snd_kcontrol *kcontrol,
146 struct snd_ctl_elem_value
147 *ucontrol);
148
149
150
151
152static int index[SNDRV_CARDS] = SNDRV_DEFAULT_IDX;
153static char *id[SNDRV_CARDS] = SNDRV_DEFAULT_STR;
154static bool enable[SNDRV_CARDS] = SNDRV_DEFAULT_ENABLE_PNP;
155
156module_param_array(index, int, NULL, 0444);
157MODULE_PARM_DESC(index, "Index value for Audiowerk2 soundcard.");
158module_param_array(id, charp, NULL, 0444);
159MODULE_PARM_DESC(id, "ID string for the Audiowerk2 soundcard.");
160module_param_array(enable, bool, NULL, 0444);
161MODULE_PARM_DESC(enable, "Enable Audiowerk2 soundcard.");
162
163static const struct pci_device_id snd_aw2_ids[] = {
164 {PCI_VENDOR_ID_PHILIPS, PCI_DEVICE_ID_PHILIPS_SAA7146, 0, 0,
165 0, 0, 0},
166 {0}
167};
168
169MODULE_DEVICE_TABLE(pci, snd_aw2_ids);
170
171
172static struct pci_driver aw2_driver = {
173 .name = KBUILD_MODNAME,
174 .id_table = snd_aw2_ids,
175 .probe = snd_aw2_probe,
176 .remove = snd_aw2_remove,
177};
178
179module_pci_driver(aw2_driver);
180
181
182static struct snd_pcm_ops snd_aw2_playback_ops = {
183 .open = snd_aw2_pcm_playback_open,
184 .close = snd_aw2_pcm_playback_close,
185 .ioctl = snd_pcm_lib_ioctl,
186 .hw_params = snd_aw2_pcm_hw_params,
187 .hw_free = snd_aw2_pcm_hw_free,
188 .prepare = snd_aw2_pcm_prepare_playback,
189 .trigger = snd_aw2_pcm_trigger_playback,
190 .pointer = snd_aw2_pcm_pointer_playback,
191};
192
193
194static struct snd_pcm_ops snd_aw2_capture_ops = {
195 .open = snd_aw2_pcm_capture_open,
196 .close = snd_aw2_pcm_capture_close,
197 .ioctl = snd_pcm_lib_ioctl,
198 .hw_params = snd_aw2_pcm_hw_params,
199 .hw_free = snd_aw2_pcm_hw_free,
200 .prepare = snd_aw2_pcm_prepare_capture,
201 .trigger = snd_aw2_pcm_trigger_capture,
202 .pointer = snd_aw2_pcm_pointer_capture,
203};
204
205static struct snd_kcontrol_new aw2_control = {
206 .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
207 .name = "PCM Capture Route",
208 .index = 0,
209 .access = SNDRV_CTL_ELEM_ACCESS_READWRITE,
210 .private_value = 0xffff,
211 .info = snd_aw2_control_switch_capture_info,
212 .get = snd_aw2_control_switch_capture_get,
213 .put = snd_aw2_control_switch_capture_put
214};
215
216
217
218
219
220
221static int snd_aw2_dev_free(struct snd_device *device)
222{
223 struct aw2 *chip = device->device_data;
224
225
226 snd_aw2_saa7146_free(&chip->saa7146);
227
228
229 if (chip->irq >= 0)
230 free_irq(chip->irq, (void *)chip);
231
232 iounmap(chip->iobase_virt);
233 pci_release_regions(chip->pci);
234
235 pci_disable_device(chip->pci);
236
237 kfree(chip);
238
239 return 0;
240}
241
242
243static int snd_aw2_create(struct snd_card *card,
244 struct pci_dev *pci, struct aw2 **rchip)
245{
246 struct aw2 *chip;
247 int err;
248 static struct snd_device_ops ops = {
249 .dev_free = snd_aw2_dev_free,
250 };
251
252 *rchip = NULL;
253
254
255 err = pci_enable_device(pci);
256 if (err < 0)
257 return err;
258 pci_set_master(pci);
259
260
261 if ((dma_set_mask(&pci->dev, DMA_BIT_MASK(32)) < 0) ||
262 (dma_set_coherent_mask(&pci->dev, DMA_BIT_MASK(32)) < 0)) {
263 dev_err(card->dev, "Impossible to set 32bit mask DMA\n");
264 pci_disable_device(pci);
265 return -ENXIO;
266 }
267 chip = kzalloc(sizeof(*chip), GFP_KERNEL);
268 if (chip == NULL) {
269 pci_disable_device(pci);
270 return -ENOMEM;
271 }
272
273
274 chip->card = card;
275 chip->pci = pci;
276 chip->irq = -1;
277
278
279 err = pci_request_regions(pci, "Audiowerk2");
280 if (err < 0) {
281 pci_disable_device(pci);
282 kfree(chip);
283 return err;
284 }
285 chip->iobase_phys = pci_resource_start(pci, 0);
286 chip->iobase_virt =
287 ioremap_nocache(chip->iobase_phys,
288 pci_resource_len(pci, 0));
289
290 if (chip->iobase_virt == NULL) {
291 dev_err(card->dev, "unable to remap memory region");
292 pci_release_regions(pci);
293 pci_disable_device(pci);
294 kfree(chip);
295 return -ENOMEM;
296 }
297
298
299 snd_aw2_saa7146_setup(&chip->saa7146, chip->iobase_virt);
300
301 if (request_irq(pci->irq, snd_aw2_saa7146_interrupt,
302 IRQF_SHARED, KBUILD_MODNAME, chip)) {
303 dev_err(card->dev, "Cannot grab irq %d\n", pci->irq);
304
305 iounmap(chip->iobase_virt);
306 pci_release_regions(chip->pci);
307 pci_disable_device(chip->pci);
308 kfree(chip);
309 return -EBUSY;
310 }
311 chip->irq = pci->irq;
312
313 err = snd_device_new(card, SNDRV_DEV_LOWLEVEL, chip, &ops);
314 if (err < 0) {
315 free_irq(chip->irq, (void *)chip);
316 iounmap(chip->iobase_virt);
317 pci_release_regions(chip->pci);
318 pci_disable_device(chip->pci);
319 kfree(chip);
320 return err;
321 }
322
323 *rchip = chip;
324
325 dev_info(card->dev,
326 "Audiowerk 2 sound card (saa7146 chipset) detected and managed\n");
327 return 0;
328}
329
330
331static int snd_aw2_probe(struct pci_dev *pci,
332 const struct pci_device_id *pci_id)
333{
334 static int dev;
335 struct snd_card *card;
336 struct aw2 *chip;
337 int err;
338
339
340 if (dev >= SNDRV_CARDS)
341 return -ENODEV;
342 if (!enable[dev]) {
343 dev++;
344 return -ENOENT;
345 }
346
347
348 err = snd_card_new(&pci->dev, index[dev], id[dev], THIS_MODULE,
349 0, &card);
350 if (err < 0)
351 return err;
352
353
354 err = snd_aw2_create(card, pci, &chip);
355 if (err < 0) {
356 snd_card_free(card);
357 return err;
358 }
359
360
361 mutex_init(&chip->mtx);
362
363 spin_lock_init(&chip->reg_lock);
364
365 strcpy(card->driver, "aw2");
366 strcpy(card->shortname, "Audiowerk2");
367
368 sprintf(card->longname, "%s with SAA7146 irq %i",
369 card->shortname, chip->irq);
370
371
372 snd_aw2_new_pcm(chip);
373
374
375 err = snd_card_register(card);
376 if (err < 0) {
377 snd_card_free(card);
378 return err;
379 }
380
381
382 pci_set_drvdata(pci, card);
383
384 dev++;
385 return 0;
386}
387
388
389static void snd_aw2_remove(struct pci_dev *pci)
390{
391 snd_card_free(pci_get_drvdata(pci));
392}
393
394
395static int snd_aw2_pcm_playback_open(struct snd_pcm_substream *substream)
396{
397 struct snd_pcm_runtime *runtime = substream->runtime;
398
399 dev_dbg(substream->pcm->card->dev, "Playback_open\n");
400 runtime->hw = snd_aw2_playback_hw;
401 return 0;
402}
403
404
405static int snd_aw2_pcm_playback_close(struct snd_pcm_substream *substream)
406{
407 return 0;
408
409}
410
411static int snd_aw2_pcm_capture_open(struct snd_pcm_substream *substream)
412{
413 struct snd_pcm_runtime *runtime = substream->runtime;
414
415 dev_dbg(substream->pcm->card->dev, "Capture_open\n");
416 runtime->hw = snd_aw2_capture_hw;
417 return 0;
418}
419
420
421static int snd_aw2_pcm_capture_close(struct snd_pcm_substream *substream)
422{
423
424 return 0;
425}
426
427
428static int snd_aw2_pcm_hw_params(struct snd_pcm_substream *substream,
429 struct snd_pcm_hw_params *hw_params)
430{
431 return snd_pcm_lib_malloc_pages(substream,
432 params_buffer_bytes(hw_params));
433}
434
435
436static int snd_aw2_pcm_hw_free(struct snd_pcm_substream *substream)
437{
438 return snd_pcm_lib_free_pages(substream);
439}
440
441
442static int snd_aw2_pcm_prepare_playback(struct snd_pcm_substream *substream)
443{
444 struct aw2_pcm_device *pcm_device = snd_pcm_substream_chip(substream);
445 struct aw2 *chip = pcm_device->chip;
446 struct snd_pcm_runtime *runtime = substream->runtime;
447 unsigned long period_size, buffer_size;
448
449 mutex_lock(&chip->mtx);
450
451 period_size = snd_pcm_lib_period_bytes(substream);
452 buffer_size = snd_pcm_lib_buffer_bytes(substream);
453
454 snd_aw2_saa7146_pcm_init_playback(&chip->saa7146,
455 pcm_device->stream_number,
456 runtime->dma_addr, period_size,
457 buffer_size);
458
459
460 snd_aw2_saa7146_define_it_playback_callback(pcm_device->stream_number,
461 (snd_aw2_saa7146_it_cb)
462 snd_pcm_period_elapsed,
463 (void *)substream);
464
465 mutex_unlock(&chip->mtx);
466
467 return 0;
468}
469
470
471static int snd_aw2_pcm_prepare_capture(struct snd_pcm_substream *substream)
472{
473 struct aw2_pcm_device *pcm_device = snd_pcm_substream_chip(substream);
474 struct aw2 *chip = pcm_device->chip;
475 struct snd_pcm_runtime *runtime = substream->runtime;
476 unsigned long period_size, buffer_size;
477
478 mutex_lock(&chip->mtx);
479
480 period_size = snd_pcm_lib_period_bytes(substream);
481 buffer_size = snd_pcm_lib_buffer_bytes(substream);
482
483 snd_aw2_saa7146_pcm_init_capture(&chip->saa7146,
484 pcm_device->stream_number,
485 runtime->dma_addr, period_size,
486 buffer_size);
487
488
489 snd_aw2_saa7146_define_it_capture_callback(pcm_device->stream_number,
490 (snd_aw2_saa7146_it_cb)
491 snd_pcm_period_elapsed,
492 (void *)substream);
493
494 mutex_unlock(&chip->mtx);
495
496 return 0;
497}
498
499
500static int snd_aw2_pcm_trigger_playback(struct snd_pcm_substream *substream,
501 int cmd)
502{
503 int status = 0;
504 struct aw2_pcm_device *pcm_device = snd_pcm_substream_chip(substream);
505 struct aw2 *chip = pcm_device->chip;
506 spin_lock(&chip->reg_lock);
507 switch (cmd) {
508 case SNDRV_PCM_TRIGGER_START:
509 snd_aw2_saa7146_pcm_trigger_start_playback(&chip->saa7146,
510 pcm_device->
511 stream_number);
512 break;
513 case SNDRV_PCM_TRIGGER_STOP:
514 snd_aw2_saa7146_pcm_trigger_stop_playback(&chip->saa7146,
515 pcm_device->
516 stream_number);
517 break;
518 default:
519 status = -EINVAL;
520 }
521 spin_unlock(&chip->reg_lock);
522 return status;
523}
524
525
526static int snd_aw2_pcm_trigger_capture(struct snd_pcm_substream *substream,
527 int cmd)
528{
529 int status = 0;
530 struct aw2_pcm_device *pcm_device = snd_pcm_substream_chip(substream);
531 struct aw2 *chip = pcm_device->chip;
532 spin_lock(&chip->reg_lock);
533 switch (cmd) {
534 case SNDRV_PCM_TRIGGER_START:
535 snd_aw2_saa7146_pcm_trigger_start_capture(&chip->saa7146,
536 pcm_device->
537 stream_number);
538 break;
539 case SNDRV_PCM_TRIGGER_STOP:
540 snd_aw2_saa7146_pcm_trigger_stop_capture(&chip->saa7146,
541 pcm_device->
542 stream_number);
543 break;
544 default:
545 status = -EINVAL;
546 }
547 spin_unlock(&chip->reg_lock);
548 return status;
549}
550
551
552static snd_pcm_uframes_t snd_aw2_pcm_pointer_playback(struct snd_pcm_substream
553 *substream)
554{
555 struct aw2_pcm_device *pcm_device = snd_pcm_substream_chip(substream);
556 struct aw2 *chip = pcm_device->chip;
557 unsigned int current_ptr;
558
559
560 struct snd_pcm_runtime *runtime = substream->runtime;
561 current_ptr =
562 snd_aw2_saa7146_get_hw_ptr_playback(&chip->saa7146,
563 pcm_device->stream_number,
564 runtime->dma_area,
565 runtime->buffer_size);
566
567 return bytes_to_frames(substream->runtime, current_ptr);
568}
569
570
571static snd_pcm_uframes_t snd_aw2_pcm_pointer_capture(struct snd_pcm_substream
572 *substream)
573{
574 struct aw2_pcm_device *pcm_device = snd_pcm_substream_chip(substream);
575 struct aw2 *chip = pcm_device->chip;
576 unsigned int current_ptr;
577
578
579 struct snd_pcm_runtime *runtime = substream->runtime;
580 current_ptr =
581 snd_aw2_saa7146_get_hw_ptr_capture(&chip->saa7146,
582 pcm_device->stream_number,
583 runtime->dma_area,
584 runtime->buffer_size);
585
586 return bytes_to_frames(substream->runtime, current_ptr);
587}
588
589
590static int snd_aw2_new_pcm(struct aw2 *chip)
591{
592 struct snd_pcm *pcm_playback_ana;
593 struct snd_pcm *pcm_playback_num;
594 struct snd_pcm *pcm_capture;
595 struct aw2_pcm_device *pcm_device;
596 int err = 0;
597
598
599
600 err = snd_pcm_new(chip->card, "Audiowerk2 analog playback", 0, 1, 0,
601 &pcm_playback_ana);
602 if (err < 0) {
603 dev_err(chip->card->dev, "snd_pcm_new error (0x%X)\n", err);
604 return err;
605 }
606
607
608 pcm_device = &chip->device_playback[NUM_STREAM_PLAYBACK_ANA];
609
610
611 strcpy(pcm_playback_ana->name, "Analog playback");
612
613 pcm_playback_ana->private_data = pcm_device;
614
615 snd_pcm_set_ops(pcm_playback_ana, SNDRV_PCM_STREAM_PLAYBACK,
616 &snd_aw2_playback_ops);
617
618 pcm_device->pcm = pcm_playback_ana;
619
620
621 pcm_device->chip = chip;
622
623 pcm_device->stream_number = NUM_STREAM_PLAYBACK_ANA;
624
625
626
627 err = snd_pcm_lib_preallocate_pages_for_all(pcm_playback_ana,
628 SNDRV_DMA_TYPE_DEV,
629 snd_dma_pci_data
630 (chip->pci),
631 64 * 1024, 64 * 1024);
632 if (err)
633 dev_err(chip->card->dev,
634 "snd_pcm_lib_preallocate_pages_for_all error (0x%X)\n",
635 err);
636
637 err = snd_pcm_new(chip->card, "Audiowerk2 digital playback", 1, 1, 0,
638 &pcm_playback_num);
639
640 if (err < 0) {
641 dev_err(chip->card->dev, "snd_pcm_new error (0x%X)\n", err);
642 return err;
643 }
644
645 pcm_device = &chip->device_playback[NUM_STREAM_PLAYBACK_DIG];
646
647
648 strcpy(pcm_playback_num->name, "Digital playback");
649
650 pcm_playback_num->private_data = pcm_device;
651
652 snd_pcm_set_ops(pcm_playback_num, SNDRV_PCM_STREAM_PLAYBACK,
653 &snd_aw2_playback_ops);
654
655 pcm_device->pcm = pcm_playback_num;
656
657
658 pcm_device->chip = chip;
659
660 pcm_device->stream_number = NUM_STREAM_PLAYBACK_DIG;
661
662
663
664 err = snd_pcm_lib_preallocate_pages_for_all(pcm_playback_num,
665 SNDRV_DMA_TYPE_DEV,
666 snd_dma_pci_data
667 (chip->pci),
668 64 * 1024, 64 * 1024);
669 if (err)
670 dev_err(chip->card->dev,
671 "snd_pcm_lib_preallocate_pages_for_all error (0x%X)\n",
672 err);
673
674 err = snd_pcm_new(chip->card, "Audiowerk2 capture", 2, 0, 1,
675 &pcm_capture);
676
677 if (err < 0) {
678 dev_err(chip->card->dev, "snd_pcm_new error (0x%X)\n", err);
679 return err;
680 }
681
682
683 pcm_device = &chip->device_capture[NUM_STREAM_CAPTURE_ANA];
684
685
686 strcpy(pcm_capture->name, "Capture");
687
688 pcm_capture->private_data = pcm_device;
689
690 snd_pcm_set_ops(pcm_capture, SNDRV_PCM_STREAM_CAPTURE,
691 &snd_aw2_capture_ops);
692
693 pcm_device->pcm = pcm_capture;
694
695
696 pcm_device->chip = chip;
697
698 pcm_device->stream_number = NUM_STREAM_CAPTURE_ANA;
699
700
701
702 err = snd_pcm_lib_preallocate_pages_for_all(pcm_capture,
703 SNDRV_DMA_TYPE_DEV,
704 snd_dma_pci_data
705 (chip->pci),
706 64 * 1024, 64 * 1024);
707 if (err)
708 dev_err(chip->card->dev,
709 "snd_pcm_lib_preallocate_pages_for_all error (0x%X)\n",
710 err);
711
712
713
714 err = snd_ctl_add(chip->card, snd_ctl_new1(&aw2_control, chip));
715 if (err < 0) {
716 dev_err(chip->card->dev, "snd_ctl_add error (0x%X)\n", err);
717 return err;
718 }
719
720 return 0;
721}
722
723static int snd_aw2_control_switch_capture_info(struct snd_kcontrol *kcontrol,
724 struct snd_ctl_elem_info *uinfo)
725{
726 static const char * const texts[2] = {
727 "Analog", "Digital"
728 };
729 return snd_ctl_enum_info(uinfo, 1, 2, texts);
730}
731
732static int snd_aw2_control_switch_capture_get(struct snd_kcontrol *kcontrol,
733 struct snd_ctl_elem_value
734 *ucontrol)
735{
736 struct aw2 *chip = snd_kcontrol_chip(kcontrol);
737 if (snd_aw2_saa7146_is_using_digital_input(&chip->saa7146))
738 ucontrol->value.enumerated.item[0] = CTL_ROUTE_DIGITAL;
739 else
740 ucontrol->value.enumerated.item[0] = CTL_ROUTE_ANALOG;
741 return 0;
742}
743
744static int snd_aw2_control_switch_capture_put(struct snd_kcontrol *kcontrol,
745 struct snd_ctl_elem_value
746 *ucontrol)
747{
748 struct aw2 *chip = snd_kcontrol_chip(kcontrol);
749 int changed = 0;
750 int is_disgital =
751 snd_aw2_saa7146_is_using_digital_input(&chip->saa7146);
752
753 if (((ucontrol->value.integer.value[0] == CTL_ROUTE_DIGITAL)
754 && !is_disgital)
755 || ((ucontrol->value.integer.value[0] == CTL_ROUTE_ANALOG)
756 && is_disgital)) {
757 snd_aw2_saa7146_use_digital_input(&chip->saa7146, !is_disgital);
758 changed = 1;
759 }
760 return changed;
761}
762
