summaryrefslogtreecommitdiff
path: root/sound/pci/lola/lola_pcm.c
blob: 6be6b7e8f5676a1a37867ed4c8aa7920f6b0f0e4 (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
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
/*
 *  Support for Digigram Lola PCI-e boards
 *
 *  Copyright (c) 2011 Takashi Iwai <tiwai@suse.de>
 *
 *  This program is free software; you can redistribute it and/or modify it
 *  under the terms of the GNU General Public License as published by the Free
 *  Software Foundation; either version 2 of the License, or (at your option)
 *  any later version.
 *
 *  This program is distributed in the hope that it will be useful, but WITHOUT
 *  ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 *  FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
 *  more details.
 *
 *  You should have received a copy of the GNU General Public License along with
 *  this program; if not, write to the Free Software Foundation, Inc., 59
 *  Temple Place - Suite 330, Boston, MA  02111-1307, USA.
 */

#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/dma-mapping.h>
#include <linux/pci.h>
#include <sound/core.h>
#include <sound/pcm.h>
#include "lola.h"

#define LOLA_MAX_BDL_ENTRIES	8
#define LOLA_MAX_BUF_SIZE	(1024*1024*1024)
#define LOLA_BDL_ENTRY_SIZE	(16 * 16)

static struct lola_pcm *lola_get_pcm(struct snd_pcm_substream *substream)
{
	struct lola *chip = snd_pcm_substream_chip(substream);
	return &chip->pcm[substream->stream];
}

static struct lola_stream *lola_get_stream(struct snd_pcm_substream *substream)
{
	struct lola_pcm *pcm = lola_get_pcm(substream);
	unsigned int idx = substream->number;
	return &pcm->streams[idx];
}

static unsigned int lola_get_lrc(struct lola *chip)
{
	return lola_readl(chip, BAR1, LRC);
}

static unsigned int lola_get_tstamp(struct lola *chip, bool quick_no_sync)
{
	unsigned int tstamp = lola_get_lrc(chip) >> 8;
	if (chip->granularity) {
		unsigned int wait_banks = quick_no_sync ? 0 : 8;
		tstamp += (wait_banks + 1) * chip->granularity - 1;
		tstamp -= tstamp % chip->granularity;
	}
	return tstamp << 8;
}

/* clear any pending interrupt status */
static void lola_stream_clear_pending_irq(struct lola *chip,
					  struct lola_stream *str)
{
	unsigned int val = lola_dsd_read(chip, str->dsd, STS);
	val &= LOLA_DSD_STS_DESE | LOLA_DSD_STS_BCIS;
	if (val)
		lola_dsd_write(chip, str->dsd, STS, val);
}

static void lola_stream_start(struct lola *chip, struct lola_stream *str,
			      unsigned int tstamp)
{
	lola_stream_clear_pending_irq(chip, str);
	lola_dsd_write(chip, str->dsd, CTL,
		       LOLA_DSD_CTL_SRUN |
		       LOLA_DSD_CTL_IOCE |
		       LOLA_DSD_CTL_DEIE |
		       LOLA_DSD_CTL_VLRCV |
		       tstamp);
}

static void lola_stream_stop(struct lola *chip, struct lola_stream *str,
			     unsigned int tstamp)
{
	lola_dsd_write(chip, str->dsd, CTL,
		       LOLA_DSD_CTL_IOCE |
		       LOLA_DSD_CTL_DEIE |
		       LOLA_DSD_CTL_VLRCV |
		       tstamp);
	lola_stream_clear_pending_irq(chip, str);
}

static void wait_for_srst_clear(struct lola *chip, struct lola_stream *str)
{
	unsigned long end_time = jiffies + msecs_to_jiffies(200);
	while (time_before(jiffies, end_time)) {
		unsigned int val;
		val = lola_dsd_read(chip, str->dsd, CTL);
		if (!(val & LOLA_DSD_CTL_SRST))
			return;
		msleep(1);
	}
	printk(KERN_WARNING SFX "SRST not clear (stream %d)\n", str->dsd);
}

static int lola_stream_wait_for_fifo(struct lola *chip,
				     struct lola_stream *str,
				     bool ready)
{
	unsigned int val = ready ? LOLA_DSD_STS_FIFORDY : 0;
	unsigned long end_time = jiffies + msecs_to_jiffies(200);
	while (time_before(jiffies, end_time)) {
		unsigned int reg = lola_dsd_read(chip, str->dsd, STS);
		if ((reg & LOLA_DSD_STS_FIFORDY) == val)
			return 0;
		msleep(1);
	}
	printk(KERN_WARNING SFX "FIFO not ready (stream %d)\n", str->dsd);
	return -EIO;
}

static void lola_stream_reset(struct lola *chip, struct lola_stream *str)
{
	if (str->prepared) {
		str->prepared = 0;

		if (str->paused) {
			/* finish pause - prepare for a new resume
			 * move this code later to trigger function,
			 * as this is also needed when resuming from pause
			 */
			str->paused = 0;
			/* implement later loop for all streams */
			lola_stream_wait_for_fifo(chip, str, false);
			lola_dsd_write(chip, str->dsd, CTL, LOLA_DSD_CTL_SRUN |
				       LOLA_DSD_CTL_IOCE | LOLA_DSD_CTL_DEIE);
			/* end loop */
			/* implement later once more loop for all streams */
			lola_stream_wait_for_fifo(chip, str, true);
			/* end loop */
			/* end finish pause */
		}
		lola_dsd_write(chip, str->dsd, CTL,
			       LOLA_DSD_CTL_IOCE | LOLA_DSD_CTL_DEIE);
		lola_stream_wait_for_fifo(chip, str, false);
		lola_stream_clear_pending_irq(chip, str);
		lola_dsd_write(chip, str->dsd, CTL, LOLA_DSD_CTL_SRST);
		lola_dsd_write(chip, str->dsd, LVI, 0);
		lola_dsd_write(chip, str->dsd, BDPU, 0);
		lola_dsd_write(chip, str->dsd, BDPL, 0);
		wait_for_srst_clear(chip, str);
	}
}

static struct snd_pcm_hardware lola_pcm_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 |
				 SNDRV_PCM_FMTBIT_S24_LE |
				 SNDRV_PCM_FMTBIT_S32_LE |
				 SNDRV_PCM_FMTBIT_FLOAT_LE),
	.rates =		SNDRV_PCM_RATE_8000_192000,
	.rate_min =		8000,
	.rate_max =		192000,
	.channels_min =		1,
	.channels_max =		2,
	.buffer_bytes_max =	LOLA_MAX_BUF_SIZE,
	.period_bytes_min =	128,
	.period_bytes_max =	LOLA_MAX_BUF_SIZE / 2,
	.periods_min =		2,
	.periods_max =		LOLA_MAX_BDL_ENTRIES,
	.fifo_size =		0,
};

static int lola_pcm_open(struct snd_pcm_substream *substream)
{
	struct lola *chip = snd_pcm_substream_chip(substream);
	struct lola_pcm *pcm = lola_get_pcm(substream);
	struct lola_stream *str = lola_get_stream(substream);
	struct snd_pcm_runtime *runtime = substream->runtime;

	mutex_lock(&chip->open_mutex);
	if (str->opened) {
		mutex_unlock(&chip->open_mutex);
		return -EBUSY;
	}
	str->substream = substream;
	str->master = NULL;
	str->opened = 1;
	runtime->hw = lola_pcm_hw;
	runtime->hw.channels_max = pcm->num_streams - str->index;
	if (chip->sample_rate) {
		/* sample rate is locked */
		runtime->hw.rate_min = chip->sample_rate;
		runtime->hw.rate_max = chip->sample_rate;
	} else {
		runtime->hw.rate_min = chip->sample_rate_min;
		runtime->hw.rate_max = chip->sample_rate_max;
	}
	chip->ref_count_rate++;
	snd_pcm_hw_constraint_integer(runtime, SNDRV_PCM_HW_PARAM_PERIODS);
	/* period size = multiple of chip->granularity (8, 16 or 32 frames)*/
	snd_pcm_hw_constraint_step(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_SIZE,
				   chip->granularity);
	snd_pcm_hw_constraint_step(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_SIZE,
				   chip->granularity);
	mutex_unlock(&chip->open_mutex);
	return 0;
}

static void lola_cleanup_slave_streams(struct lola_pcm *pcm,
				       struct lola_stream *str)
{
	int i;
	for (i = str->index + 1; i < pcm->num_streams; i++) {
		struct lola_stream *s = &pcm->streams[i];
		if (s->master != str)
			break;
		s->master = NULL;
		s->opened = 0;
	}
}

static int lola_pcm_close(struct snd_pcm_substream *substream)
{
	struct lola *chip = snd_pcm_substream_chip(substream);
	struct lola_stream *str = lola_get_stream(substream);

	mutex_lock(&chip->open_mutex);
	if (str->substream == substream) {
		str->substream = NULL;
		str->opened = 0;
	}
	if (--chip->ref_count_rate == 0) {
		/* release sample rate */
		chip->sample_rate = 0;
	}
	mutex_unlock(&chip->open_mutex);
	return 0;
}

static int lola_pcm_hw_params(struct snd_pcm_substream *substream,
			      struct snd_pcm_hw_params *hw_params)
{
	struct lola_stream *str = lola_get_stream(substream);

	str->bufsize = 0;
	str->period_bytes = 0;
	str->format_verb = 0;
	return snd_pcm_lib_malloc_pages(substream,
					params_buffer_bytes(hw_params));
}

static int lola_pcm_hw_free(struct snd_pcm_substream *substream)
{
	struct lola *chip = snd_pcm_substream_chip(substream);
	struct lola_pcm *pcm = lola_get_pcm(substream);
	struct lola_stream *str = lola_get_stream(substream);

	mutex_lock(&chip->open_mutex);
	lola_stream_reset(chip, str);
	lola_cleanup_slave_streams(pcm, str);
	mutex_unlock(&chip->open_mutex);
	return snd_pcm_lib_free_pages(substream);
}

/*
 * set up a BDL entry
 */
static int setup_bdle(struct snd_pcm_substream *substream,
		      struct lola_stream *str, u32 **bdlp,
		      int ofs, int size)
{
	u32 *bdl = *bdlp;

	while (size > 0) {
		dma_addr_t addr;
		int chunk;

		if (str->frags >= LOLA_MAX_BDL_ENTRIES)
			return -EINVAL;

		addr = snd_pcm_sgbuf_get_addr(substream, ofs);
		/* program the address field of the BDL entry */
		bdl[0] = cpu_to_le32((u32)addr);
		bdl[1] = cpu_to_le32(upper_32_bits(addr));
		/* program the size field of the BDL entry */
		chunk = snd_pcm_sgbuf_get_chunk_size(substream, ofs, size);
		bdl[2] = cpu_to_le32(chunk);
		/* program the IOC to enable interrupt
		 * only when the whole fragment is processed
		 */
		size -= chunk;
		bdl[3] = size ? 0 : cpu_to_le32(0x01);
		bdl += 4;
		str->frags++;
		ofs += chunk;
	}
	*bdlp = bdl;
	return ofs;
}

/*
 * set up BDL entries
 */
static int lola_setup_periods(struct lola *chip, struct lola_pcm *pcm,
			      struct snd_pcm_substream *substream,
			      struct lola_stream *str)
{
	u32 *bdl;
	int i, ofs, periods, period_bytes;

	period_bytes = str->period_bytes;
	periods = str->bufsize / period_bytes;

	/* program the initial BDL entries */
	bdl = (u32 *)(pcm->bdl.area + LOLA_BDL_ENTRY_SIZE * str->index);
	ofs = 0;
	str->frags = 0;
	for (i = 0; i < periods; i++) {
		ofs = setup_bdle(substream, str, &bdl, ofs, period_bytes);
		if (ofs < 0)
			goto error;
	}
	return 0;

 error:
	snd_printk(KERN_ERR SFX "Too many BDL entries: buffer=%d, period=%d\n",
		   str->bufsize, period_bytes);
	return -EINVAL;
}

static unsigned int lola_get_format_verb(struct snd_pcm_substream *substream)
{
	unsigned int verb;

	switch (substream->runtime->format) {
	case SNDRV_PCM_FORMAT_S16_LE:
		verb = 0x00000000;
		break;
	case SNDRV_PCM_FORMAT_S24_LE:
		verb = 0x00000200;
		break;
	case SNDRV_PCM_FORMAT_S32_LE:
		verb = 0x00000300;
		break;
	case SNDRV_PCM_FORMAT_FLOAT_LE:
		verb = 0x00001300;
		break;
	default:
		return 0;
	}
	verb |= substream->runtime->channels;
	return verb;
}

static int lola_set_stream_config(struct lola *chip,
				  struct lola_stream *str,
				  int channels)
{
	int i, err;
	unsigned int verb, val;

	/* set format info for all channels
	 * (with only one command for the first channel)
	 */
	err = lola_codec_read(chip, str->nid, LOLA_VERB_SET_STREAM_FORMAT,
			      str->format_verb, 0, &val, NULL);
	if (err < 0) {
		printk(KERN_ERR SFX "Cannot set stream format 0x%x\n",
		       str->format_verb);
		return err;
	}

	/* update stream - channel config */
	for (i = 0; i < channels; i++) {
		verb = (str->index << 6) | i;
		err = lola_codec_read(chip, str[i].nid,
				      LOLA_VERB_SET_CHANNEL_STREAMID, 0, verb,
				      &val, NULL);
		if (err < 0) {
			printk(KERN_ERR SFX "Cannot set stream channel %d\n", i);
			return err;
		}
	}
	return 0;
}

/*
 * set up the SD for streaming
 */
static int lola_setup_controller(struct lola *chip, struct lola_pcm *pcm,
				 struct lola_stream *str)
{
	dma_addr_t bdl;

	if (str->prepared)
		return -EINVAL;

	/* set up BDL */
	bdl = pcm->bdl.addr + LOLA_BDL_ENTRY_SIZE * str->index;
	lola_dsd_write(chip, str->dsd, BDPL, (u32)bdl);
	lola_dsd_write(chip, str->dsd, BDPU, upper_32_bits(bdl));
	/* program the stream LVI (last valid index) of the BDL */
	lola_dsd_write(chip, str->dsd, LVI, str->frags - 1);
	lola_stream_clear_pending_irq(chip, str);

 	lola_dsd_write(chip, str->dsd, CTL,
		       LOLA_DSD_CTL_IOCE | LOLA_DSD_CTL_DEIE | LOLA_DSD_CTL_SRUN);

	str->prepared = 1;

	return lola_stream_wait_for_fifo(chip, str, true);
}

static int lola_pcm_prepare(struct snd_pcm_substream *substream)
{
	struct lola *chip = snd_pcm_substream_chip(substream);
	struct lola_pcm *pcm = lola_get_pcm(substream);
	struct lola_stream *str = lola_get_stream(substream);
	struct snd_pcm_runtime *runtime = substream->runtime;
	unsigned int bufsize, period_bytes, format_verb;
	int i, err;

	mutex_lock(&chip->open_mutex);
	lola_stream_reset(chip, str);
	lola_cleanup_slave_streams(pcm, str);
	if (str->index + runtime->channels >= pcm->num_streams) {
		mutex_unlock(&chip->open_mutex);
		return -EINVAL;
	}
	for (i = 1; i < runtime->channels; i++) {
		str[i].master = str;
		str[i].opened = 1;
	}
	mutex_unlock(&chip->open_mutex);

	bufsize = snd_pcm_lib_buffer_bytes(substream);
	period_bytes = snd_pcm_lib_period_bytes(substream);
	format_verb = lola_get_format_verb(substream);

	str->bufsize = bufsize;
	str->period_bytes = period_bytes;
	str->format_verb = format_verb;

	err = lola_setup_periods(chip, pcm, substream, str);
	if (err < 0)
		return err;

	err = lola_set_sample_rate(chip, runtime->rate);
	if (err < 0)
		return err;
	chip->sample_rate = runtime->rate;	/* sample rate gets locked */

	err = lola_set_stream_config(chip, str, runtime->channels);
	if (err < 0)
		return err;

	err = lola_setup_controller(chip, pcm, str);
	if (err < 0) {
		lola_stream_reset(chip, str);
		return err;
	}

	return 0;
}

static int lola_pcm_trigger(struct snd_pcm_substream *substream, int cmd)
{
	struct lola *chip = snd_pcm_substream_chip(substream);
	struct lola_stream *str;
	struct snd_pcm_substream *s;
	unsigned int start;
	unsigned int tstamp;
	bool sync_streams;

	switch (cmd) {
	case SNDRV_PCM_TRIGGER_START:
	case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
	case SNDRV_PCM_TRIGGER_RESUME:
		start = 1;
		break;
	case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
	case SNDRV_PCM_TRIGGER_SUSPEND:
	case SNDRV_PCM_TRIGGER_STOP:
		start = 0;
		break;
	default:
		return -EINVAL;
	}

	/*
	 * sample correct synchronization is only needed starting several
	 * streams on stop or if only one stream do as quick as possible
	 */
	sync_streams = (start && snd_pcm_stream_linked(substream));
	tstamp = lola_get_tstamp(chip, !sync_streams);
	spin_lock(&chip->reg_lock);
	snd_pcm_group_for_each_entry(s, substream) {
		if (s->pcm->card != substream->pcm->card)
			continue;
		str = lola_get_stream(s);
		if (start)
			lola_stream_start(chip, str, tstamp);
		else
			lola_stream_stop(chip, str, tstamp);
		str->running = start;
		str->paused = !start;
		snd_pcm_trigger_done(s, substream);
	}
	spin_unlock(&chip->reg_lock);
	return 0;
}

static snd_pcm_uframes_t lola_pcm_pointer(struct snd_pcm_substream *substream)
{
	struct lola *chip = snd_pcm_substream_chip(substream);
	struct lola_stream *str = lola_get_stream(substream);
	unsigned int pos = lola_dsd_read(chip, str->dsd, LPIB);

	if (pos >= str->bufsize)
		pos = 0;
	return bytes_to_frames(substream->runtime, pos);
}

void lola_pcm_update(struct lola *chip, struct lola_pcm *pcm, unsigned int bits)
{
	int i;

	for (i = 0; bits && i < pcm->num_streams; i++) {
		if (bits & (1 << i)) {
			struct lola_stream *str = &pcm->streams[i];
			if (str->substream && str->running)
				snd_pcm_period_elapsed(str->substream);
			bits &= ~(1 << i);
		}
	}
}

static struct snd_pcm_ops lola_pcm_ops = {
	.open = lola_pcm_open,
	.close = lola_pcm_close,
	.ioctl = snd_pcm_lib_ioctl,
	.hw_params = lola_pcm_hw_params,
	.hw_free = lola_pcm_hw_free,
	.prepare = lola_pcm_prepare,
	.trigger = lola_pcm_trigger,
	.pointer = lola_pcm_pointer,
	.page = snd_pcm_sgbuf_ops_page,
};

int __devinit lola_create_pcm(struct lola *chip)
{
	struct snd_pcm *pcm;
	int i, err;

	for (i = 0; i < 2; i++) {
		err = snd_dma_alloc_pages(SNDRV_DMA_TYPE_DEV,
					  snd_dma_pci_data(chip->pci),
					  PAGE_SIZE, &chip->pcm[i].bdl);
		if (err < 0)
			return err;
	}

	err = snd_pcm_new(chip->card, "Digigram Lola", 0,
			  chip->pcm[SNDRV_PCM_STREAM_PLAYBACK].num_streams,
			  chip->pcm[SNDRV_PCM_STREAM_CAPTURE].num_streams,
			  &pcm);
	if (err < 0)
		return err;
	strlcpy(pcm->name, "Digigram Lola", sizeof(pcm->name));
	pcm->private_data = chip;
	for (i = 0; i < 2; i++) {
		if (chip->pcm[i].num_streams)
			snd_pcm_set_ops(pcm, i, &lola_pcm_ops);
	}
	/* buffer pre-allocation */
	snd_pcm_lib_preallocate_pages_for_all(pcm, SNDRV_DMA_TYPE_DEV_SG,
					      snd_dma_pci_data(chip->pci),
					      1024 * 64, 32 * 1024 * 1024);
	return 0;
}

void lola_free_pcm(struct lola *chip)
{
	snd_dma_free_pages(&chip->pcm[0].bdl);
	snd_dma_free_pages(&chip->pcm[1].bdl);
}

/*
 */

static int lola_init_stream(struct lola *chip, struct lola_stream *str,
			    int idx, int nid, int dir)
{
	unsigned int val;
	int err;

	str->nid = nid;
	str->index = idx;
	str->dsd = idx;
	if (dir == PLAY)
		str->dsd += MAX_STREAM_IN_COUNT;
	err = lola_read_param(chip, nid, LOLA_PAR_AUDIO_WIDGET_CAP, &val);
	if (err < 0) {
		printk(KERN_ERR SFX "Can't read wcaps for 0x%x\n", nid);
		return err;
	}
	if (dir == PLAY) {
		/* test TYPE and bits 0..11 (no test bit9 : Digital = 0/1) */
		if ((val & 0x00f00dff) != 0x00000010) {
			printk(KERN_ERR SFX "Invalid wcaps 0x%x for 0x%x\n",
			       val, nid);
			return -EINVAL;
		}
	} else {
		/* test TYPE and bits 0..11 (no test bit9 : Digital = 0/1)
		 * (bug : ignore bit8: Conn list = 0/1)
		 */
		if ((val & 0x00f00cff) != 0x00100010) {
			printk(KERN_ERR SFX "Invalid wcaps 0x%x for 0x%x\n",
			       val, nid);
			return -EINVAL;
		}
		/* test bit9:DIGITAL and bit12:SRC_PRESENT*/
		if ((val & 0x00001200) == 0x00001200)
			chip->input_src_caps_mask |= (1 << idx);
	}

	err = lola_read_param(chip, nid, LOLA_PAR_STREAM_FORMATS, &val);
	if (err < 0) {
		printk(KERN_ERR SFX "Can't read FORMATS 0x%x\n", nid);
		return err;
	}
	val &= 3;
	if (val == 3)
		str->can_float = true;
	if (!(val & 1)) {
		printk(KERN_ERR SFX "Invalid formats 0x%x for 0x%x", val, nid);
		return -EINVAL;
	}
	return 0;
}

int __devinit lola_init_pcm(struct lola *chip, int dir, int *nidp)
{
	struct lola_pcm *pcm = &chip->pcm[dir];
	int i, nid, err;

	nid = *nidp;
	for (i = 0; i < pcm->num_streams; i++, nid++) {
		err = lola_init_stream(chip, &pcm->streams[i], i, nid, dir);
		if (err < 0)
			return err;
	}
	*nidp = nid;
	return 0;
}