xref: /openbmc/linux/sound/pci/aw2/aw2-alsa.c (revision 3a943321)
1 // SPDX-License-Identifier: GPL-2.0-only
2 /*****************************************************************************
3  *
4  * Copyright (C) 2008 Cedric Bregardis <cedric.bregardis@free.fr> and
5  * Jean-Christian Hassler <jhassler@free.fr>
6  *
7  * This file is part of the Audiowerk2 ALSA driver
8  *
9  *****************************************************************************/
10 #include <linux/init.h>
11 #include <linux/pci.h>
12 #include <linux/dma-mapping.h>
13 #include <linux/slab.h>
14 #include <linux/interrupt.h>
15 #include <linux/delay.h>
16 #include <linux/io.h>
17 #include <linux/module.h>
18 #include <sound/core.h>
19 #include <sound/initval.h>
20 #include <sound/pcm.h>
21 #include <sound/pcm_params.h>
22 #include <sound/control.h>
23 
24 #include "saa7146.h"
25 #include "aw2-saa7146.h"
26 
27 MODULE_AUTHOR("Cedric Bregardis <cedric.bregardis@free.fr>, "
28 	      "Jean-Christian Hassler <jhassler@free.fr>");
29 MODULE_DESCRIPTION("Emagic Audiowerk 2 sound driver");
30 MODULE_LICENSE("GPL");
31 
32 /*********************************
33  * DEFINES
34  ********************************/
35 #define CTL_ROUTE_ANALOG 0
36 #define CTL_ROUTE_DIGITAL 1
37 
38 /*********************************
39  * TYPEDEFS
40  ********************************/
41   /* hardware definition */
42 static const struct snd_pcm_hardware snd_aw2_playback_hw = {
43 	.info = (SNDRV_PCM_INFO_MMAP |
44 		 SNDRV_PCM_INFO_INTERLEAVED |
45 		 SNDRV_PCM_INFO_BLOCK_TRANSFER | SNDRV_PCM_INFO_MMAP_VALID),
46 	.formats = SNDRV_PCM_FMTBIT_S16_LE,
47 	.rates = SNDRV_PCM_RATE_44100,
48 	.rate_min = 44100,
49 	.rate_max = 44100,
50 	.channels_min = 2,
51 	.channels_max = 4,
52 	.buffer_bytes_max = 32768,
53 	.period_bytes_min = 4096,
54 	.period_bytes_max = 32768,
55 	.periods_min = 1,
56 	.periods_max = 1024,
57 };
58 
59 static const struct snd_pcm_hardware snd_aw2_capture_hw = {
60 	.info = (SNDRV_PCM_INFO_MMAP |
61 		 SNDRV_PCM_INFO_INTERLEAVED |
62 		 SNDRV_PCM_INFO_BLOCK_TRANSFER | SNDRV_PCM_INFO_MMAP_VALID),
63 	.formats = SNDRV_PCM_FMTBIT_S16_LE,
64 	.rates = SNDRV_PCM_RATE_44100,
65 	.rate_min = 44100,
66 	.rate_max = 44100,
67 	.channels_min = 2,
68 	.channels_max = 2,
69 	.buffer_bytes_max = 32768,
70 	.period_bytes_min = 4096,
71 	.period_bytes_max = 32768,
72 	.periods_min = 1,
73 	.periods_max = 1024,
74 };
75 
76 struct aw2_pcm_device {
77 	struct snd_pcm *pcm;
78 	unsigned int stream_number;
79 	struct aw2 *chip;
80 };
81 
82 struct aw2 {
83 	struct snd_aw2_saa7146 saa7146;
84 
85 	struct pci_dev *pci;
86 	int irq;
87 	spinlock_t reg_lock;
88 	struct mutex mtx;
89 
90 	unsigned long iobase_phys;
91 	void __iomem *iobase_virt;
92 
93 	struct snd_card *card;
94 
95 	struct aw2_pcm_device device_playback[NB_STREAM_PLAYBACK];
96 	struct aw2_pcm_device device_capture[NB_STREAM_CAPTURE];
97 };
98 
99 /*********************************
100  * FUNCTION DECLARATIONS
101  ********************************/
102 static int snd_aw2_create(struct snd_card *card, struct pci_dev *pci);
103 static int snd_aw2_probe(struct pci_dev *pci,
104 			 const struct pci_device_id *pci_id);
105 static int snd_aw2_pcm_playback_open(struct snd_pcm_substream *substream);
106 static int snd_aw2_pcm_playback_close(struct snd_pcm_substream *substream);
107 static int snd_aw2_pcm_capture_open(struct snd_pcm_substream *substream);
108 static int snd_aw2_pcm_capture_close(struct snd_pcm_substream *substream);
109 static int snd_aw2_pcm_prepare_playback(struct snd_pcm_substream *substream);
110 static int snd_aw2_pcm_prepare_capture(struct snd_pcm_substream *substream);
111 static int snd_aw2_pcm_trigger_playback(struct snd_pcm_substream *substream,
112 					int cmd);
113 static int snd_aw2_pcm_trigger_capture(struct snd_pcm_substream *substream,
114 				       int cmd);
115 static snd_pcm_uframes_t snd_aw2_pcm_pointer_playback(struct snd_pcm_substream
116 						      *substream);
117 static snd_pcm_uframes_t snd_aw2_pcm_pointer_capture(struct snd_pcm_substream
118 						     *substream);
119 static int snd_aw2_new_pcm(struct aw2 *chip);
120 
121 static int snd_aw2_control_switch_capture_info(struct snd_kcontrol *kcontrol,
122 					       struct snd_ctl_elem_info *uinfo);
123 static int snd_aw2_control_switch_capture_get(struct snd_kcontrol *kcontrol,
124 					      struct snd_ctl_elem_value
125 					      *ucontrol);
126 static int snd_aw2_control_switch_capture_put(struct snd_kcontrol *kcontrol,
127 					      struct snd_ctl_elem_value
128 					      *ucontrol);
129 
130 /*********************************
131  * VARIABLES
132  ********************************/
133 static int index[SNDRV_CARDS] = SNDRV_DEFAULT_IDX;
134 static char *id[SNDRV_CARDS] = SNDRV_DEFAULT_STR;
135 static bool enable[SNDRV_CARDS] = SNDRV_DEFAULT_ENABLE_PNP;
136 
137 module_param_array(index, int, NULL, 0444);
138 MODULE_PARM_DESC(index, "Index value for Audiowerk2 soundcard.");
139 module_param_array(id, charp, NULL, 0444);
140 MODULE_PARM_DESC(id, "ID string for the Audiowerk2 soundcard.");
141 module_param_array(enable, bool, NULL, 0444);
142 MODULE_PARM_DESC(enable, "Enable Audiowerk2 soundcard.");
143 
144 static const struct pci_device_id snd_aw2_ids[] = {
145 	{PCI_VENDOR_ID_PHILIPS, PCI_DEVICE_ID_PHILIPS_SAA7146, 0, 0,
146 	 0, 0, 0},
147 	{0}
148 };
149 
150 MODULE_DEVICE_TABLE(pci, snd_aw2_ids);
151 
152 /* pci_driver definition */
153 static struct pci_driver aw2_driver = {
154 	.name = KBUILD_MODNAME,
155 	.id_table = snd_aw2_ids,
156 	.probe = snd_aw2_probe,
157 };
158 
159 module_pci_driver(aw2_driver);
160 
161 /* operators for playback PCM alsa interface */
162 static const struct snd_pcm_ops snd_aw2_playback_ops = {
163 	.open = snd_aw2_pcm_playback_open,
164 	.close = snd_aw2_pcm_playback_close,
165 	.prepare = snd_aw2_pcm_prepare_playback,
166 	.trigger = snd_aw2_pcm_trigger_playback,
167 	.pointer = snd_aw2_pcm_pointer_playback,
168 };
169 
170 /* operators for capture PCM alsa interface */
171 static const struct snd_pcm_ops snd_aw2_capture_ops = {
172 	.open = snd_aw2_pcm_capture_open,
173 	.close = snd_aw2_pcm_capture_close,
174 	.prepare = snd_aw2_pcm_prepare_capture,
175 	.trigger = snd_aw2_pcm_trigger_capture,
176 	.pointer = snd_aw2_pcm_pointer_capture,
177 };
178 
179 static const struct snd_kcontrol_new aw2_control = {
180 	.iface = SNDRV_CTL_ELEM_IFACE_MIXER,
181 	.name = "PCM Capture Route",
182 	.index = 0,
183 	.access = SNDRV_CTL_ELEM_ACCESS_READWRITE,
184 	.private_value = 0xffff,
185 	.info = snd_aw2_control_switch_capture_info,
186 	.get = snd_aw2_control_switch_capture_get,
187 	.put = snd_aw2_control_switch_capture_put
188 };
189 
190 /*********************************
191  * FUNCTION IMPLEMENTATIONS
192  ********************************/
193 
194 /* component-destructor */
snd_aw2_free(struct snd_card * card)195 static void snd_aw2_free(struct snd_card *card)
196 {
197 	struct aw2 *chip = card->private_data;
198 
199 	/* Free hardware */
200 	snd_aw2_saa7146_free(&chip->saa7146);
201 }
202 
203 /* chip-specific constructor */
snd_aw2_create(struct snd_card * card,struct pci_dev * pci)204 static int snd_aw2_create(struct snd_card *card,
205 			  struct pci_dev *pci)
206 {
207 	struct aw2 *chip = card->private_data;
208 	int err;
209 
210 	/* initialize the PCI entry */
211 	err = pcim_enable_device(pci);
212 	if (err < 0)
213 		return err;
214 	pci_set_master(pci);
215 
216 	/* check PCI availability (32bit DMA) */
217 	if (dma_set_mask_and_coherent(&pci->dev, DMA_BIT_MASK(32))) {
218 		dev_err(card->dev, "Impossible to set 32bit mask DMA\n");
219 		return -ENXIO;
220 	}
221 
222 	/* initialize the stuff */
223 	chip->card = card;
224 	chip->pci = pci;
225 	chip->irq = -1;
226 
227 	/* (1) PCI resource allocation */
228 	err = pcim_iomap_regions(pci, 1 << 0, "Audiowerk2");
229 	if (err < 0)
230 		return err;
231 	chip->iobase_phys = pci_resource_start(pci, 0);
232 	chip->iobase_virt = pcim_iomap_table(pci)[0];
233 
234 	/* (2) initialization of the chip hardware */
235 	snd_aw2_saa7146_setup(&chip->saa7146, chip->iobase_virt);
236 
237 	if (devm_request_irq(&pci->dev, pci->irq, snd_aw2_saa7146_interrupt,
238 			     IRQF_SHARED, KBUILD_MODNAME, chip)) {
239 		dev_err(card->dev, "Cannot grab irq %d\n", pci->irq);
240 		return -EBUSY;
241 	}
242 	chip->irq = pci->irq;
243 	card->sync_irq = chip->irq;
244 	card->private_free = snd_aw2_free;
245 
246 	dev_info(card->dev,
247 		 "Audiowerk 2 sound card (saa7146 chipset) detected and managed\n");
248 	return 0;
249 }
250 
251 /* constructor */
snd_aw2_probe(struct pci_dev * pci,const struct pci_device_id * pci_id)252 static int snd_aw2_probe(struct pci_dev *pci,
253 			 const struct pci_device_id *pci_id)
254 {
255 	static int dev;
256 	struct snd_card *card;
257 	struct aw2 *chip;
258 	int err;
259 
260 	/* (1) Continue if device is not enabled, else inc dev */
261 	if (dev >= SNDRV_CARDS)
262 		return -ENODEV;
263 	if (!enable[dev]) {
264 		dev++;
265 		return -ENOENT;
266 	}
267 
268 	/* (2) Create card instance */
269 	err = snd_devm_card_new(&pci->dev, index[dev], id[dev], THIS_MODULE,
270 				sizeof(*chip), &card);
271 	if (err < 0)
272 		return err;
273 	chip = card->private_data;
274 
275 	/* (3) Create main component */
276 	err = snd_aw2_create(card, pci);
277 	if (err < 0)
278 		goto error;
279 
280 	/* initialize mutex */
281 	mutex_init(&chip->mtx);
282 	/* init spinlock */
283 	spin_lock_init(&chip->reg_lock);
284 	/* (4) Define driver ID and name string */
285 	strcpy(card->driver, "aw2");
286 	strcpy(card->shortname, "Audiowerk2");
287 
288 	sprintf(card->longname, "%s with SAA7146 irq %i",
289 		card->shortname, chip->irq);
290 
291 	/* (5) Create other components */
292 	snd_aw2_new_pcm(chip);
293 
294 	/* (6) Register card instance */
295 	err = snd_card_register(card);
296 	if (err < 0)
297 		goto error;
298 
299 	/* (7) Set PCI driver data */
300 	pci_set_drvdata(pci, card);
301 
302 	dev++;
303 	return 0;
304 
305  error:
306 	snd_card_free(card);
307 	return err;
308 }
309 
310 /* open callback */
snd_aw2_pcm_playback_open(struct snd_pcm_substream * substream)311 static int snd_aw2_pcm_playback_open(struct snd_pcm_substream *substream)
312 {
313 	struct snd_pcm_runtime *runtime = substream->runtime;
314 
315 	dev_dbg(substream->pcm->card->dev, "Playback_open\n");
316 	runtime->hw = snd_aw2_playback_hw;
317 	return 0;
318 }
319 
320 /* close callback */
snd_aw2_pcm_playback_close(struct snd_pcm_substream * substream)321 static int snd_aw2_pcm_playback_close(struct snd_pcm_substream *substream)
322 {
323 	return 0;
324 
325 }
326 
snd_aw2_pcm_capture_open(struct snd_pcm_substream * substream)327 static int snd_aw2_pcm_capture_open(struct snd_pcm_substream *substream)
328 {
329 	struct snd_pcm_runtime *runtime = substream->runtime;
330 
331 	dev_dbg(substream->pcm->card->dev, "Capture_open\n");
332 	runtime->hw = snd_aw2_capture_hw;
333 	return 0;
334 }
335 
336 /* close callback */
snd_aw2_pcm_capture_close(struct snd_pcm_substream * substream)337 static int snd_aw2_pcm_capture_close(struct snd_pcm_substream *substream)
338 {
339 	/* TODO: something to do ? */
340 	return 0;
341 }
342 
343 /* prepare callback for playback */
snd_aw2_pcm_prepare_playback(struct snd_pcm_substream * substream)344 static int snd_aw2_pcm_prepare_playback(struct snd_pcm_substream *substream)
345 {
346 	struct aw2_pcm_device *pcm_device = snd_pcm_substream_chip(substream);
347 	struct aw2 *chip = pcm_device->chip;
348 	struct snd_pcm_runtime *runtime = substream->runtime;
349 	unsigned long period_size, buffer_size;
350 
351 	mutex_lock(&chip->mtx);
352 
353 	period_size = snd_pcm_lib_period_bytes(substream);
354 	buffer_size = snd_pcm_lib_buffer_bytes(substream);
355 
356 	snd_aw2_saa7146_pcm_init_playback(&chip->saa7146,
357 					  pcm_device->stream_number,
358 					  runtime->dma_addr, period_size,
359 					  buffer_size);
360 
361 	/* Define Interrupt callback */
362 	snd_aw2_saa7146_define_it_playback_callback(pcm_device->stream_number,
363 						    (snd_aw2_saa7146_it_cb)
364 						    snd_pcm_period_elapsed,
365 						    (void *)substream);
366 
367 	mutex_unlock(&chip->mtx);
368 
369 	return 0;
370 }
371 
372 /* prepare callback for capture */
snd_aw2_pcm_prepare_capture(struct snd_pcm_substream * substream)373 static int snd_aw2_pcm_prepare_capture(struct snd_pcm_substream *substream)
374 {
375 	struct aw2_pcm_device *pcm_device = snd_pcm_substream_chip(substream);
376 	struct aw2 *chip = pcm_device->chip;
377 	struct snd_pcm_runtime *runtime = substream->runtime;
378 	unsigned long period_size, buffer_size;
379 
380 	mutex_lock(&chip->mtx);
381 
382 	period_size = snd_pcm_lib_period_bytes(substream);
383 	buffer_size = snd_pcm_lib_buffer_bytes(substream);
384 
385 	snd_aw2_saa7146_pcm_init_capture(&chip->saa7146,
386 					 pcm_device->stream_number,
387 					 runtime->dma_addr, period_size,
388 					 buffer_size);
389 
390 	/* Define Interrupt callback */
391 	snd_aw2_saa7146_define_it_capture_callback(pcm_device->stream_number,
392 						   (snd_aw2_saa7146_it_cb)
393 						   snd_pcm_period_elapsed,
394 						   (void *)substream);
395 
396 	mutex_unlock(&chip->mtx);
397 
398 	return 0;
399 }
400 
401 /* playback trigger callback */
snd_aw2_pcm_trigger_playback(struct snd_pcm_substream * substream,int cmd)402 static int snd_aw2_pcm_trigger_playback(struct snd_pcm_substream *substream,
403 					int cmd)
404 {
405 	int status = 0;
406 	struct aw2_pcm_device *pcm_device = snd_pcm_substream_chip(substream);
407 	struct aw2 *chip = pcm_device->chip;
408 	spin_lock(&chip->reg_lock);
409 	switch (cmd) {
410 	case SNDRV_PCM_TRIGGER_START:
411 		snd_aw2_saa7146_pcm_trigger_start_playback(&chip->saa7146,
412 							   pcm_device->
413 							   stream_number);
414 		break;
415 	case SNDRV_PCM_TRIGGER_STOP:
416 		snd_aw2_saa7146_pcm_trigger_stop_playback(&chip->saa7146,
417 							  pcm_device->
418 							  stream_number);
419 		break;
420 	default:
421 		status = -EINVAL;
422 	}
423 	spin_unlock(&chip->reg_lock);
424 	return status;
425 }
426 
427 /* capture trigger callback */
snd_aw2_pcm_trigger_capture(struct snd_pcm_substream * substream,int cmd)428 static int snd_aw2_pcm_trigger_capture(struct snd_pcm_substream *substream,
429 				       int cmd)
430 {
431 	int status = 0;
432 	struct aw2_pcm_device *pcm_device = snd_pcm_substream_chip(substream);
433 	struct aw2 *chip = pcm_device->chip;
434 	spin_lock(&chip->reg_lock);
435 	switch (cmd) {
436 	case SNDRV_PCM_TRIGGER_START:
437 		snd_aw2_saa7146_pcm_trigger_start_capture(&chip->saa7146,
438 							  pcm_device->
439 							  stream_number);
440 		break;
441 	case SNDRV_PCM_TRIGGER_STOP:
442 		snd_aw2_saa7146_pcm_trigger_stop_capture(&chip->saa7146,
443 							 pcm_device->
444 							 stream_number);
445 		break;
446 	default:
447 		status = -EINVAL;
448 	}
449 	spin_unlock(&chip->reg_lock);
450 	return status;
451 }
452 
453 /* playback pointer callback */
snd_aw2_pcm_pointer_playback(struct snd_pcm_substream * substream)454 static snd_pcm_uframes_t snd_aw2_pcm_pointer_playback(struct snd_pcm_substream
455 						      *substream)
456 {
457 	struct aw2_pcm_device *pcm_device = snd_pcm_substream_chip(substream);
458 	struct aw2 *chip = pcm_device->chip;
459 	unsigned int current_ptr;
460 
461 	/* get the current hardware pointer */
462 	struct snd_pcm_runtime *runtime = substream->runtime;
463 	current_ptr =
464 		snd_aw2_saa7146_get_hw_ptr_playback(&chip->saa7146,
465 						    pcm_device->stream_number,
466 						    runtime->dma_area,
467 						    runtime->buffer_size);
468 
469 	return bytes_to_frames(substream->runtime, current_ptr);
470 }
471 
472 /* capture pointer callback */
snd_aw2_pcm_pointer_capture(struct snd_pcm_substream * substream)473 static snd_pcm_uframes_t snd_aw2_pcm_pointer_capture(struct snd_pcm_substream
474 						     *substream)
475 {
476 	struct aw2_pcm_device *pcm_device = snd_pcm_substream_chip(substream);
477 	struct aw2 *chip = pcm_device->chip;
478 	unsigned int current_ptr;
479 
480 	/* get the current hardware pointer */
481 	struct snd_pcm_runtime *runtime = substream->runtime;
482 	current_ptr =
483 		snd_aw2_saa7146_get_hw_ptr_capture(&chip->saa7146,
484 						   pcm_device->stream_number,
485 						   runtime->dma_area,
486 						   runtime->buffer_size);
487 
488 	return bytes_to_frames(substream->runtime, current_ptr);
489 }
490 
491 /* create a pcm device */
snd_aw2_new_pcm(struct aw2 * chip)492 static int snd_aw2_new_pcm(struct aw2 *chip)
493 {
494 	struct snd_pcm *pcm_playback_ana;
495 	struct snd_pcm *pcm_playback_num;
496 	struct snd_pcm *pcm_capture;
497 	struct aw2_pcm_device *pcm_device;
498 	int err = 0;
499 
500 	/* Create new Alsa PCM device */
501 
502 	err = snd_pcm_new(chip->card, "Audiowerk2 analog playback", 0, 1, 0,
503 			  &pcm_playback_ana);
504 	if (err < 0) {
505 		dev_err(chip->card->dev, "snd_pcm_new error (0x%X)\n", err);
506 		return err;
507 	}
508 
509 	/* Creation ok */
510 	pcm_device = &chip->device_playback[NUM_STREAM_PLAYBACK_ANA];
511 
512 	/* Set PCM device name */
513 	strcpy(pcm_playback_ana->name, "Analog playback");
514 	/* Associate private data to PCM device */
515 	pcm_playback_ana->private_data = pcm_device;
516 	/* set operators of PCM device */
517 	snd_pcm_set_ops(pcm_playback_ana, SNDRV_PCM_STREAM_PLAYBACK,
518 			&snd_aw2_playback_ops);
519 	/* store PCM device */
520 	pcm_device->pcm = pcm_playback_ana;
521 	/* give base chip pointer to our internal pcm device
522 	   structure */
523 	pcm_device->chip = chip;
524 	/* Give stream number to PCM device */
525 	pcm_device->stream_number = NUM_STREAM_PLAYBACK_ANA;
526 
527 	/* pre-allocation of buffers */
528 	/* Preallocate continuous pages. */
529 	snd_pcm_set_managed_buffer_all(pcm_playback_ana,
530 				       SNDRV_DMA_TYPE_DEV,
531 				       &chip->pci->dev,
532 				       64 * 1024, 64 * 1024);
533 
534 	err = snd_pcm_new(chip->card, "Audiowerk2 digital playback", 1, 1, 0,
535 			  &pcm_playback_num);
536 
537 	if (err < 0) {
538 		dev_err(chip->card->dev, "snd_pcm_new error (0x%X)\n", err);
539 		return err;
540 	}
541 	/* Creation ok */
542 	pcm_device = &chip->device_playback[NUM_STREAM_PLAYBACK_DIG];
543 
544 	/* Set PCM device name */
545 	strcpy(pcm_playback_num->name, "Digital playback");
546 	/* Associate private data to PCM device */
547 	pcm_playback_num->private_data = pcm_device;
548 	/* set operators of PCM device */
549 	snd_pcm_set_ops(pcm_playback_num, SNDRV_PCM_STREAM_PLAYBACK,
550 			&snd_aw2_playback_ops);
551 	/* store PCM device */
552 	pcm_device->pcm = pcm_playback_num;
553 	/* give base chip pointer to our internal pcm device
554 	   structure */
555 	pcm_device->chip = chip;
556 	/* Give stream number to PCM device */
557 	pcm_device->stream_number = NUM_STREAM_PLAYBACK_DIG;
558 
559 	/* pre-allocation of buffers */
560 	/* Preallocate continuous pages. */
561 	snd_pcm_set_managed_buffer_all(pcm_playback_num,
562 				       SNDRV_DMA_TYPE_DEV,
563 				       &chip->pci->dev,
564 				       64 * 1024, 64 * 1024);
565 
566 	err = snd_pcm_new(chip->card, "Audiowerk2 capture", 2, 0, 1,
567 			  &pcm_capture);
568 
569 	if (err < 0) {
570 		dev_err(chip->card->dev, "snd_pcm_new error (0x%X)\n", err);
571 		return err;
572 	}
573 
574 	/* Creation ok */
575 	pcm_device = &chip->device_capture[NUM_STREAM_CAPTURE_ANA];
576 
577 	/* Set PCM device name */
578 	strcpy(pcm_capture->name, "Capture");
579 	/* Associate private data to PCM device */
580 	pcm_capture->private_data = pcm_device;
581 	/* set operators of PCM device */
582 	snd_pcm_set_ops(pcm_capture, SNDRV_PCM_STREAM_CAPTURE,
583 			&snd_aw2_capture_ops);
584 	/* store PCM device */
585 	pcm_device->pcm = pcm_capture;
586 	/* give base chip pointer to our internal pcm device
587 	   structure */
588 	pcm_device->chip = chip;
589 	/* Give stream number to PCM device */
590 	pcm_device->stream_number = NUM_STREAM_CAPTURE_ANA;
591 
592 	/* pre-allocation of buffers */
593 	/* Preallocate continuous pages. */
594 	snd_pcm_set_managed_buffer_all(pcm_capture,
595 				       SNDRV_DMA_TYPE_DEV,
596 				       &chip->pci->dev,
597 				       64 * 1024, 64 * 1024);
598 
599 	/* Create control */
600 	err = snd_ctl_add(chip->card, snd_ctl_new1(&aw2_control, chip));
601 	if (err < 0) {
602 		dev_err(chip->card->dev, "snd_ctl_add error (0x%X)\n", err);
603 		return err;
604 	}
605 
606 	return 0;
607 }
608 
snd_aw2_control_switch_capture_info(struct snd_kcontrol * kcontrol,struct snd_ctl_elem_info * uinfo)609 static int snd_aw2_control_switch_capture_info(struct snd_kcontrol *kcontrol,
610 					       struct snd_ctl_elem_info *uinfo)
611 {
612 	static const char * const texts[2] = {
613 		"Analog", "Digital"
614 	};
615 	return snd_ctl_enum_info(uinfo, 1, 2, texts);
616 }
617 
snd_aw2_control_switch_capture_get(struct snd_kcontrol * kcontrol,struct snd_ctl_elem_value * ucontrol)618 static int snd_aw2_control_switch_capture_get(struct snd_kcontrol *kcontrol,
619 					      struct snd_ctl_elem_value
620 					      *ucontrol)
621 {
622 	struct aw2 *chip = snd_kcontrol_chip(kcontrol);
623 	if (snd_aw2_saa7146_is_using_digital_input(&chip->saa7146))
624 		ucontrol->value.enumerated.item[0] = CTL_ROUTE_DIGITAL;
625 	else
626 		ucontrol->value.enumerated.item[0] = CTL_ROUTE_ANALOG;
627 	return 0;
628 }
629 
snd_aw2_control_switch_capture_put(struct snd_kcontrol * kcontrol,struct snd_ctl_elem_value * ucontrol)630 static int snd_aw2_control_switch_capture_put(struct snd_kcontrol *kcontrol,
631 					      struct snd_ctl_elem_value
632 					      *ucontrol)
633 {
634 	struct aw2 *chip = snd_kcontrol_chip(kcontrol);
635 	int changed = 0;
636 	int is_disgital =
637 	    snd_aw2_saa7146_is_using_digital_input(&chip->saa7146);
638 
639 	if (((ucontrol->value.integer.value[0] == CTL_ROUTE_DIGITAL)
640 	     && !is_disgital)
641 	    || ((ucontrol->value.integer.value[0] == CTL_ROUTE_ANALOG)
642 		&& is_disgital)) {
643 		snd_aw2_saa7146_use_digital_input(&chip->saa7146, !is_disgital);
644 		changed = 1;
645 	}
646 	return changed;
647 }
648