summaryrefslogtreecommitdiffstats
path: root/sound/pci/ctxfi/ctpcm.c
blob: 52ddf19d83bb43b53e7ff1d242f76835de5372d3 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
/**
 * Copyright (C) 2008, Creative Technology Ltd. All Rights Reserved.
 *
 * This source file is released under GPL v2 license (no other versions).
 * See the COPYING file included in the main directory of this source
 * distribution for the license terms and conditions.
 *
 * @File	ctpcm.c
 *
 * @Brief
 * This file contains the definition of the pcm device functions.
 *
 * @Author	Liu Chun
 * @Date 	Apr 2 2008
 *
 */

#include "ctpcm.h"
#include <sound/pcm.h>

/* Hardware descriptions for playback */
static struct snd_pcm_hardware ct_pcm_playback_hw = {
	.info			= (SNDRV_PCM_INFO_MMAP |
				   SNDRV_PCM_INFO_INTERLEAVED |
				   SNDRV_PCM_INFO_BLOCK_TRANSFER |
				   SNDRV_PCM_INFO_MMAP_VALID |
				   SNDRV_PCM_INFO_PAUSE),
	.formats		= (SNDRV_PCM_FMTBIT_U8 |
				   SNDRV_PCM_FMTBIT_S16_LE |
				   SNDRV_PCM_FMTBIT_S24_3LE |
				   SNDRV_PCM_FMTBIT_S32_LE |
				   SNDRV_PCM_FMTBIT_FLOAT_LE),
	.rates			= (SNDRV_PCM_RATE_CONTINUOUS |
				   SNDRV_PCM_RATE_8000_192000),
	.rate_min		= 8000,
	.rate_max		= 192000,
	.channels_min		= 1,
	.channels_max		= 2,
	.buffer_bytes_max	= (128*1024),
	.period_bytes_min	= (64),
	.period_bytes_max	= (128*1024),
	.periods_min		= 1,
	.periods_max		= 1024,
	.fifo_size		= 0,
};

static struct snd_pcm_hardware ct_spdif_passthru_playback_hw = {
	.info			= (SNDRV_PCM_INFO_MMAP |
				   SNDRV_PCM_INFO_INTERLEAVED |
				   SNDRV_PCM_INFO_BLOCK_TRANSFER |
				   SNDRV_PCM_INFO_MMAP_VALID |
				   SNDRV_PCM_INFO_PAUSE),
	.formats		= SNDRV_PCM_FMTBIT_S16_LE,
	.rates			= (SNDRV_PCM_RATE_48000 |
				   SNDRV_PCM_RATE_44100 |
				   SNDRV_PCM_RATE_32000),
	.rate_min		= 32000,
	.rate_max		= 48000,
	.channels_min		= 2,
	.channels_max		= 2,
	.buffer_bytes_max	= (128*1024),
	.period_bytes_min	= (64),
	.period_bytes_max	= (128*1024),
	.periods_min		= 1,
	.periods_max		= 1024,
	.fifo_size		= 0,
};

/* Hardware descriptions for capture */
static struct snd_pcm_hardware ct_pcm_capture_hw = {
	.info			= (SNDRV_PCM_INFO_MMAP |
				   SNDRV_PCM_INFO_INTERLEAVED |
				   SNDRV_PCM_INFO_BLOCK_TRANSFER |
				   SNDRV_PCM_INFO_PAUSE |
				   SNDRV_PCM_INFO_MMAP_VALID),
	.formats		= (SNDRV_PCM_FMTBIT_U8 |
				   SNDRV_PCM_FMTBIT_S16_LE |
				   SNDRV_PCM_FMTBIT_S24_3LE |
				   SNDRV_PCM_FMTBIT_S32_LE |
				   SNDRV_PCM_FMTBIT_FLOAT_LE),
	.rates			= (SNDRV_PCM_RATE_CONTINUOUS |
				   SNDRV_PCM_RATE_8000_96000),
	.rate_min		= 8000,
	.rate_max		= 96000,
	.channels_min		= 1,
	.channels_max		= 2,
	.buffer_bytes_max	= (128*1024),
	.period_bytes_min	= (384),
	.period_bytes_max	= (64*1024),
	.periods_min		= 2,
	.periods_max		= 1024,
	.fifo_size		= 0,
};

static void ct_atc_pcm_interrupt(struct ct_atc_pcm *atc_pcm)
{
	struct ct_atc_pcm *apcm = atc_pcm;

	if (NULL == apcm->substream)
		return;

	snd_pcm_period_elapsed(apcm->substream);
}

static void ct_atc_pcm_free_substream(struct snd_pcm_runtime *runtime)
{
	struct ct_atc_pcm *apcm = runtime->private_data;
	struct ct_atc *atc = snd_pcm_substream_chip(apcm->substream);

	atc->pcm_release_resources(atc, apcm);
	kfree(apcm);
	runtime->private_data = NULL;
}

/* pcm playback operations */
static int ct_pcm_playback_open(struct snd_pcm_substream *substream)
{
	struct ct_atc *atc = snd_pcm_substream_chip(substream);
	struct snd_pcm_runtime *runtime = substream->runtime;
	struct ct_atc_pcm *apcm;
	int err;

	apcm = kzalloc(sizeof(*apcm), GFP_KERNEL);
	if (NULL == apcm)
		return -ENOMEM;

	spin_lock_init(&apcm->timer_lock);
	apcm->stop_timer = 0;
	apcm->substream = substream;
	apcm->interrupt = ct_atc_pcm_interrupt;
	runtime->private_data = apcm;
	runtime->private_free = ct_atc_pcm_free_substream;
	if (IEC958 == substream->pcm->device) {
		runtime->hw = ct_spdif_passthru_playback_hw;
		atc->spdif_out_passthru(atc, 1);
	} else {
		runtime->hw = ct_pcm_playback_hw;
		if (FRONT == substream->pcm->device)
			runtime->hw.channels_max = 8;
	}

	err = snd_pcm_hw_constraint_integer(runtime,
					    SNDRV_PCM_HW_PARAM_PERIODS);
	if (err < 0) {
		kfree(apcm);
		return err;
	}
	err = snd_pcm_hw_constraint_minmax(runtime,
					   SNDRV_PCM_HW_PARAM_BUFFER_BYTES,
					   1024, UINT_MAX);
	if (err < 0) {
		kfree(apcm);
		return err;
	}

	return 0;
}

static int ct_pcm_playback_close(struct snd_pcm_substream *substream)
{
	struct ct_atc *atc = snd_pcm_substream_chip(substream);

	/* TODO: Notify mixer inactive. */
	if (IEC958 == substream->pcm->device)
		atc->spdif_out_passthru(atc, 0);

	/* The ct_atc_pcm object will be freed by runtime->private_free */

	return 0;
}

static int ct_pcm_hw_params(struct snd_pcm_substream *substream,
				     struct snd_pcm_hw_params *hw_params)
{
	return snd_pcm_lib_malloc_pages(substream,
					params_buffer_bytes(hw_params));
}

static int ct_pcm_hw_free(struct snd_pcm_substream *substream)
{
	/* Free snd-allocated pages */
	return snd_pcm_lib_free_pages(substream);
}

static void ct_pcm_timer_callback(unsigned long data)
{
	struct ct_atc_pcm *apcm = (struct ct_atc_pcm *)data;
	struct snd_pcm_substream *substream = apcm->substream;
	struct snd_pcm_runtime *runtime = substream->runtime;
	unsigned int period_size = runtime->period_size;
	unsigned int buffer_size = runtime->buffer_size;
	unsigned long flags;
	unsigned int position = 0, dist = 0, interval = 0;

	position = substream->ops->pointer(substream);
	dist = (position + buffer_size - apcm->position) % buffer_size;
	if ((dist >= period_size) ||
		(position/period_size != apcm->position/period_size)) {
		apcm->interrupt(apcm);
		apcm->position = position;
	}
	/* Add extra HZ*5/1000 to avoid overrun issue when recording
	 * at 8kHz in 8-bit format or at 88kHz in 24-bit format. */
	interval = ((period_size - (position % period_size))
		   * HZ + (runtime->rate - 1)) / runtime->rate + HZ * 5 / 1000;
	spin_lock_irqsave(&apcm->timer_lock, flags);
	apcm->timer.expires = jiffies + interval;
	if (!apcm->stop_timer)
		add_timer(&apcm->timer);

	spin_unlock_irqrestore(&apcm->timer_lock, flags);
}

static int ct_pcm_timer_prepare(struct ct_atc_pcm *apcm)
{
	unsigned long flags;

	spin_lock_irqsave(&apcm->timer_lock, flags);
	if (timer_pending(&apcm->timer)) {
		/* The timer has already been started. */
		spin_unlock_irqrestore(&apcm->timer_lock, flags);
		return 0;
	}

	init_timer(&apcm->timer);
	apcm->timer.data = (unsigned long)apcm;
	apcm->timer.function = ct_pcm_timer_callback;
	spin_unlock_irqrestore(&apcm->timer_lock, flags);
	apcm->position = 0;

	return 0;
}

static int ct_pcm_timer_start(struct ct_atc_pcm *apcm)
{
	struct snd_pcm_runtime *runtime = apcm->substream->runtime;
	unsigned long flags;

	spin_lock_irqsave(&apcm->timer_lock, flags);
	if (timer_pending(&apcm->timer)) {
		/* The timer has already been started. */
		spin_unlock_irqrestore(&apcm->timer_lock, flags);
		return 0;
	}

	apcm->timer.expires = jiffies + (runtime->period_size * HZ +
				(runtime->rate - 1)) / runtime->rate;
	apcm->stop_timer = 0;
	add_timer(&apcm->timer);
	spin_unlock_irqrestore(&apcm->timer_lock, flags);

	return 0;
}

static int ct_pcm_timer_stop(struct ct_atc_pcm *apcm)
{
	unsigned long flags;

	spin_lock_irqsave(&apcm->timer_lock, flags);
	apcm->stop_timer = 1;
	del_timer(&apcm->timer);
	spin_unlock_irqrestore(&apcm->timer_lock, flags);

	try_to_del_timer_sync(&apcm->timer);

	return 0;
}

static int ct_pcm_playback_prepare(struct snd_pcm_substream *substream)
{
	int err;
	struct ct_atc *atc = snd_pcm_substream_chip(substream);
	struct snd_pcm_runtime *runtime = substream->runtime;
	struct ct_atc_pcm *apcm = runtime->private_data;

	if (IEC958 == substream->pcm->device)
		err = atc->spdif_passthru_playback_prepare(atc, apcm);
	else
		err = atc->pcm_playback_prepare(atc, apcm);

	if (err < 0) {
		printk(KERN_ERR "ctxfi: Preparing pcm playback failed!!!\n");
		return err;
	}

	ct_pcm_timer_prepare(apcm);

	return 0;
}

static int
ct_pcm_playback_trigger(struct snd_pcm_substream *substream, int cmd)
{
	struct ct_atc *atc = snd_pcm_substream_chip(substream);
	struct snd_pcm_runtime *runtime = substream->runtime;
	struct ct_atc_pcm *apcm = runtime->private_data;

	switch (cmd) {
	case SNDRV_PCM_TRIGGER_START:
	case SNDRV_PCM_TRIGGER_RESUME:
	case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
		atc->pcm_playback_start(atc, apcm);
		ct_pcm_timer_start(apcm);
		break;
	case SNDRV_PCM_TRIGGER_STOP:
	case SNDRV_PCM_TRIGGER_SUSPEND:
	case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
		ct_pcm_timer_stop(apcm);
		atc->pcm_playback_stop(atc, apcm);
		break;
	default:
		break;
	}

	return 0;
}

static snd_pcm_uframes_t
ct_pcm_playback_pointer(struct snd_pcm_substream *substream)
{
	unsigned long position;
	struct ct_atc *atc = snd_pcm_substream_chip(substream);
	struct snd_pcm_runtime *runtime = substream->runtime;
	struct ct_atc_pcm *apcm = runtime->private_data;

	/* Read out playback position */
	position = atc->pcm_playback_position(atc, apcm);
	position = bytes_to_frames(runtime, position);
	return position;
}

/* pcm capture operations */
static int ct_pcm_capture_open(struct snd_pcm_substream *substream)
{
	struct ct_atc *atc = snd_pcm_substream_chip(substream);
	struct snd_pcm_runtime *runtime = substream->runtime;
	struct ct_atc_pcm *apcm;
	int err;

	apcm = kzalloc(sizeof(*apcm), GFP_KERNEL);
	if (NULL == apcm)
		return -ENOMEM;

	spin_lock_init(&apcm->timer_lock);
	apcm->started = 0;
	apcm->stop_timer = 0;
	apcm->substream = substream;
	apcm->interrupt = ct_atc_pcm_interrupt;
	runtime->private_data = apcm;
	runtime->private_free = ct_atc_pcm_free_substream;
	runtime->hw = ct_pcm_capture_hw;
	runtime->hw.rate_max = atc->rsr * atc->msr;

	err = snd_pcm_hw_constraint_integer(runtime,
					    SNDRV_PCM_HW_PARAM_PERIODS);
	if (err < 0) {
		kfree(apcm);
		return err;
	}
	err = snd_pcm_hw_constraint_minmax(runtime,
					   SNDRV_PCM_HW_PARAM_BUFFER_BYTES,
					   1024, UINT_MAX);
	if (err < 0) {
		kfree(apcm);
		return err;
	}

	return 0;
}

static int ct_pcm_capture_close(struct snd_pcm_substream *substream)
{
	/* The ct_atc_pcm object will be freed by runtime->private_free */
	/* TODO: Notify mixer inactive. */
	return 0;
}

static int ct_pcm_capture_prepare(struct snd_pcm_substream *substream)
{
	int err;
	struct ct_atc *atc = snd_pcm_substream_chip(substream);
	struct snd_pcm_runtime *runtime = substream->runtime;
	struct ct_atc_pcm *apcm = runtime->private_data;

	err = atc->pcm_capture_prepare(atc, apcm);
	if (err < 0) {
		printk(KERN_ERR "ctxfi: Preparing pcm capture failed!!!\n");
		return err;
	}

	ct_pcm_timer_prepare(apcm);

	return 0;
}

static int
ct_pcm_capture_trigger(struct snd_pcm_substream *substream, int cmd)
{
	struct ct_atc *atc = snd_pcm_substream_chip(substream);
	struct snd_pcm_runtime *runtime = substream->runtime;
	struct ct_atc_pcm *apcm = runtime->private_data;

	switch (cmd) {
	case SNDRV_PCM_TRIGGER_START:
		atc->pcm_capture_start(atc, apcm);
		ct_pcm_timer_start(apcm);
		break;
	case SNDRV_PCM_TRIGGER_STOP:
		ct_pcm_timer_stop(apcm);
		atc->pcm_capture_stop(atc, apcm);
		break;
	default:
		ct_pcm_timer_stop(apcm);
		atc->pcm_capture_stop(atc, apcm);
		break;
	}

	return 0;
}

static snd_pcm_uframes_t
ct_pcm_capture_pointer(struct snd_pcm_substream *substream)
{
	unsigned long position;
	struct ct_atc *atc = snd_pcm_substream_chip(substream);
	struct snd_pcm_runtime *runtime = substream->runtime;
	struct ct_atc_pcm *apcm = runtime->private_data;

	/* Read out playback position */
	position = atc->pcm_capture_position(atc, apcm);
	position = bytes_to_frames(runtime, position);
	return position;
}

/* PCM operators for playback */
static struct snd_pcm_ops ct_pcm_playback_ops = {
	.open	 	= ct_pcm_playback_open,
	.close		= ct_pcm_playback_close,
	.ioctl		= snd_pcm_lib_ioctl,
	.hw_params	= ct_pcm_hw_params,
	.hw_free	= ct_pcm_hw_free,
	.prepare	= ct_pcm_playback_prepare,
	.trigger	= ct_pcm_playback_trigger,
	.pointer	= ct_pcm_playback_pointer,
	.page		= snd_pcm_sgbuf_ops_page,
};

/* PCM operators for capture */
static struct snd_pcm_ops ct_pcm_capture_ops = {
	.open	 	= ct_pcm_capture_open,
	.close		= ct_pcm_capture_close,
	.ioctl		= snd_pcm_lib_ioctl,
	.hw_params	= ct_pcm_hw_params,
	.hw_free	= ct_pcm_hw_free,
	.prepare	= ct_pcm_capture_prepare,
	.trigger	= ct_pcm_capture_trigger,
	.pointer	= ct_pcm_capture_pointer,
	.page		= snd_pcm_sgbuf_ops_page,
};

/* Create ALSA pcm device */
int ct_alsa_pcm_create(struct ct_atc *atc,
		       enum CTALSADEVS device,
		       const char *device_name)
{
	struct snd_pcm *pcm;
	int err;
	int playback_count, capture_count;

	playback_count = (IEC958 == device) ? 1 : 8;
	capture_count = (FRONT == device) ? 1 : 0;
	err = snd_pcm_new(atc->card, "ctxfi", device,
			  playback_count, capture_count, &pcm);
	if (err < 0) {
		printk(KERN_ERR "ctxfi: snd_pcm_new failed!! Err=%d\n", err);
		return err;
	}

	pcm->private_data = atc;
	pcm->info_flags = 0;
	pcm->dev_subclass = SNDRV_PCM_SUBCLASS_GENERIC_MIX;
	strlcpy(pcm->name, device_name, sizeof(pcm->name));

	snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &ct_pcm_playback_ops);

	if (FRONT == device)
		snd_pcm_set_ops(pcm,
				SNDRV_PCM_STREAM_CAPTURE, &ct_pcm_capture_ops);

	snd_pcm_lib_preallocate_pages_for_all(pcm, SNDRV_DMA_TYPE_DEV_SG,
			snd_dma_pci_data(atc->pci), 128*1024, 128*1024);

	return 0;
}