CoCalc -- pcm

GitHub Repository: awilliam/linux-vfio
Path: blob/master/sound/core/oss/pcm_oss.c
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1
/*
2
 *  Digital Audio (PCM) abstract layer / OSS compatible
3
 *  Copyright (c) by Jaroslav Kysela <[email protected]>
4
 *
5
 *
6
 *   This program is free software; you can redistribute it and/or modify
7
 *   it under the terms of the GNU General Public License as published by
8
 *   the Free Software Foundation; either version 2 of the License, or
9
 *   (at your option) any later version.
10
 *
11
 *   This program is distributed in the hope that it will be useful,
12
 *   but WITHOUT ANY WARRANTY; without even the implied warranty of
13
 *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
14
 *   GNU General Public License for more details.
15
 *
16
 *   You should have received a copy of the GNU General Public License
17
 *   along with this program; if not, write to the Free Software
18
 *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
19
 *
20
 */
21

22
#if 0
23
#define PLUGIN_DEBUG
24
#endif
25
#if 0
26
#define OSS_DEBUG
27
#endif
28

29
#include <linux/init.h>
30
#include <linux/slab.h>
31
#include <linux/time.h>
32
#include <linux/vmalloc.h>
33
#include <linux/moduleparam.h>
34
#include <linux/math64.h>
35
#include <linux/string.h>
36
#include <sound/core.h>
37
#include <sound/minors.h>
38
#include <sound/pcm.h>
39
#include <sound/pcm_params.h>
40
#include "pcm_plugin.h"
41
#include <sound/info.h>
42
#include <linux/soundcard.h>
43
#include <sound/initval.h>
44
#include <sound/mixer_oss.h>
45

46
#define OSS_ALSAEMULVER		_SIOR ('M', 249, int)
47

48
static int dsp_map[SNDRV_CARDS];
49
static int adsp_map[SNDRV_CARDS] = {[0 ... (SNDRV_CARDS-1)] = 1};
50
static int nonblock_open = 1;
51

52
MODULE_AUTHOR("Jaroslav Kysela <[email protected]>, Abramo Bagnara <[email protected]>");
53
MODULE_DESCRIPTION("PCM OSS emulation for ALSA.");
54
MODULE_LICENSE("GPL");
55
module_param_array(dsp_map, int, NULL, 0444);
56
MODULE_PARM_DESC(dsp_map, "PCM device number assigned to 1st OSS device.");
57
module_param_array(adsp_map, int, NULL, 0444);
58
MODULE_PARM_DESC(adsp_map, "PCM device number assigned to 2nd OSS device.");
59
module_param(nonblock_open, bool, 0644);
60
MODULE_PARM_DESC(nonblock_open, "Don't block opening busy PCM devices.");
61
MODULE_ALIAS_SNDRV_MINOR(SNDRV_MINOR_OSS_PCM);
62
MODULE_ALIAS_SNDRV_MINOR(SNDRV_MINOR_OSS_PCM1);
63

64
static int snd_pcm_oss_get_rate(struct snd_pcm_oss_file *pcm_oss_file);
65
static int snd_pcm_oss_get_channels(struct snd_pcm_oss_file *pcm_oss_file);
66
static int snd_pcm_oss_get_format(struct snd_pcm_oss_file *pcm_oss_file);
67

68
static inline mm_segment_t snd_enter_user(void)
69
{
70
	mm_segment_t fs = get_fs();
71
	set_fs(get_ds());
72
	return fs;
73
}
74

75
static inline void snd_leave_user(mm_segment_t fs)
76
{
77
	set_fs(fs);
78
}
79

80
/*
81
 * helper functions to process hw_params
82
 */
83
static int snd_interval_refine_min(struct snd_interval *i, unsigned int min, int openmin)
84
{
85
	int changed = 0;
86
	if (i->min < min) {
87
		i->min = min;
88
		i->openmin = openmin;
89
		changed = 1;
90
	} else if (i->min == min && !i->openmin && openmin) {
91
		i->openmin = 1;
92
		changed = 1;
93
	}
94
	if (i->integer) {
95
		if (i->openmin) {
96
			i->min++;
97
			i->openmin = 0;
98
		}
99
	}
100
	if (snd_interval_checkempty(i)) {
101
		snd_interval_none(i);
102
		return -EINVAL;
103
	}
104
	return changed;
105
}
106

107
static int snd_interval_refine_max(struct snd_interval *i, unsigned int max, int openmax)
108
{
109
	int changed = 0;
110
	if (i->max > max) {
111
		i->max = max;
112
		i->openmax = openmax;
113
		changed = 1;
114
	} else if (i->max == max && !i->openmax && openmax) {
115
		i->openmax = 1;
116
		changed = 1;
117
	}
118
	if (i->integer) {
119
		if (i->openmax) {
120
			i->max--;
121
			i->openmax = 0;
122
		}
123
	}
124
	if (snd_interval_checkempty(i)) {
125
		snd_interval_none(i);
126
		return -EINVAL;
127
	}
128
	return changed;
129
}
130

131
static int snd_interval_refine_set(struct snd_interval *i, unsigned int val)
132
{
133
	struct snd_interval t;
134
	t.empty = 0;
135
	t.min = t.max = val;
136
	t.openmin = t.openmax = 0;
137
	t.integer = 1;
138
	return snd_interval_refine(i, &t);
139
}
140

141
/**
142
 * snd_pcm_hw_param_value_min
143
 * @params: the hw_params instance
144
 * @var: parameter to retrieve
145
 * @dir: pointer to the direction (-1,0,1) or NULL
146
 *
147
 * Return the minimum value for field PAR.
148
 */
149
static unsigned int
150
snd_pcm_hw_param_value_min(const struct snd_pcm_hw_params *params,
151
			   snd_pcm_hw_param_t var, int *dir)
152
{
153
	if (hw_is_mask(var)) {
154
		if (dir)
155
			*dir = 0;
156
		return snd_mask_min(hw_param_mask_c(params, var));
157
	}
158
	if (hw_is_interval(var)) {
159
		const struct snd_interval *i = hw_param_interval_c(params, var);
160
		if (dir)
161
			*dir = i->openmin;
162
		return snd_interval_min(i);
163
	}
164
	return -EINVAL;
165
}
166

167
/**
168
 * snd_pcm_hw_param_value_max
169
 * @params: the hw_params instance
170
 * @var: parameter to retrieve
171
 * @dir: pointer to the direction (-1,0,1) or NULL
172
 *
173
 * Return the maximum value for field PAR.
174
 */
175
static unsigned int
176
snd_pcm_hw_param_value_max(const struct snd_pcm_hw_params *params,
177
			   snd_pcm_hw_param_t var, int *dir)
178
{
179
	if (hw_is_mask(var)) {
180
		if (dir)
181
			*dir = 0;
182
		return snd_mask_max(hw_param_mask_c(params, var));
183
	}
184
	if (hw_is_interval(var)) {
185
		const struct snd_interval *i = hw_param_interval_c(params, var);
186
		if (dir)
187
			*dir = - (int) i->openmax;
188
		return snd_interval_max(i);
189
	}
190
	return -EINVAL;
191
}
192

193
static int _snd_pcm_hw_param_mask(struct snd_pcm_hw_params *params,
194
				  snd_pcm_hw_param_t var,
195
				  const struct snd_mask *val)
196
{
197
	int changed;
198
	changed = snd_mask_refine(hw_param_mask(params, var), val);
199
	if (changed) {
200
		params->cmask |= 1 << var;
201
		params->rmask |= 1 << var;
202
	}
203
	return changed;
204
}
205

206
static int snd_pcm_hw_param_mask(struct snd_pcm_substream *pcm,
207
				 struct snd_pcm_hw_params *params,
208
				 snd_pcm_hw_param_t var,
209
				 const struct snd_mask *val)
210
{
211
	int changed = _snd_pcm_hw_param_mask(params, var, val);
212
	if (changed < 0)
213
		return changed;
214
	if (params->rmask) {
215
		int err = snd_pcm_hw_refine(pcm, params);
216
		if (err < 0)
217
			return err;
218
	}
219
	return 0;
220
}
221

222
static int _snd_pcm_hw_param_min(struct snd_pcm_hw_params *params,
223
				 snd_pcm_hw_param_t var, unsigned int val,
224
				 int dir)
225
{
226
	int changed;
227
	int open = 0;
228
	if (dir) {
229
		if (dir > 0) {
230
			open = 1;
231
		} else if (dir < 0) {
232
			if (val > 0) {
233
				open = 1;
234
				val--;
235
			}
236
		}
237
	}
238
	if (hw_is_mask(var))
239
		changed = snd_mask_refine_min(hw_param_mask(params, var),
240
					      val + !!open);
241
	else if (hw_is_interval(var))
242
		changed = snd_interval_refine_min(hw_param_interval(params, var),
243
						  val, open);
244
	else
245
		return -EINVAL;
246
	if (changed) {
247
		params->cmask |= 1 << var;
248
		params->rmask |= 1 << var;
249
	}
250
	return changed;
251
}
252

253
/**
254
 * snd_pcm_hw_param_min
255
 * @pcm: PCM instance
256
 * @params: the hw_params instance
257
 * @var: parameter to retrieve
258
 * @val: minimal value
259
 * @dir: pointer to the direction (-1,0,1) or NULL
260
 *
261
 * Inside configuration space defined by PARAMS remove from PAR all 
262
 * values < VAL. Reduce configuration space accordingly.
263
 * Return new minimum or -EINVAL if the configuration space is empty
264
 */
265
static int snd_pcm_hw_param_min(struct snd_pcm_substream *pcm,
266
				struct snd_pcm_hw_params *params,
267
				snd_pcm_hw_param_t var, unsigned int val,
268
				int *dir)
269
{
270
	int changed = _snd_pcm_hw_param_min(params, var, val, dir ? *dir : 0);
271
	if (changed < 0)
272
		return changed;
273
	if (params->rmask) {
274
		int err = snd_pcm_hw_refine(pcm, params);
275
		if (err < 0)
276
			return err;
277
	}
278
	return snd_pcm_hw_param_value_min(params, var, dir);
279
}
280

281
static int _snd_pcm_hw_param_max(struct snd_pcm_hw_params *params,
282
				 snd_pcm_hw_param_t var, unsigned int val,
283
				 int dir)
284
{
285
	int changed;
286
	int open = 0;
287
	if (dir) {
288
		if (dir < 0) {
289
			open = 1;
290
		} else if (dir > 0) {
291
			open = 1;
292
			val++;
293
		}
294
	}
295
	if (hw_is_mask(var)) {
296
		if (val == 0 && open) {
297
			snd_mask_none(hw_param_mask(params, var));
298
			changed = -EINVAL;
299
		} else
300
			changed = snd_mask_refine_max(hw_param_mask(params, var),
301
						      val - !!open);
302
	} else if (hw_is_interval(var))
303
		changed = snd_interval_refine_max(hw_param_interval(params, var),
304
						  val, open);
305
	else
306
		return -EINVAL;
307
	if (changed) {
308
		params->cmask |= 1 << var;
309
		params->rmask |= 1 << var;
310
	}
311
	return changed;
312
}
313

314
/**
315
 * snd_pcm_hw_param_max
316
 * @pcm: PCM instance
317
 * @params: the hw_params instance
318
 * @var: parameter to retrieve
319
 * @val: maximal value
320
 * @dir: pointer to the direction (-1,0,1) or NULL
321
 *
322
 * Inside configuration space defined by PARAMS remove from PAR all 
323
 *  values >= VAL + 1. Reduce configuration space accordingly.
324
 *  Return new maximum or -EINVAL if the configuration space is empty
325
 */
326
static int snd_pcm_hw_param_max(struct snd_pcm_substream *pcm,
327
				struct snd_pcm_hw_params *params,
328
				snd_pcm_hw_param_t var, unsigned int val,
329
				int *dir)
330
{
331
	int changed = _snd_pcm_hw_param_max(params, var, val, dir ? *dir : 0);
332
	if (changed < 0)
333
		return changed;
334
	if (params->rmask) {
335
		int err = snd_pcm_hw_refine(pcm, params);
336
		if (err < 0)
337
			return err;
338
	}
339
	return snd_pcm_hw_param_value_max(params, var, dir);
340
}
341

342
static int boundary_sub(int a, int adir,
343
			int b, int bdir,
344
			int *c, int *cdir)
345
{
346
	adir = adir < 0 ? -1 : (adir > 0 ? 1 : 0);
347
	bdir = bdir < 0 ? -1 : (bdir > 0 ? 1 : 0);
348
	*c = a - b;
349
	*cdir = adir - bdir;
350
	if (*cdir == -2) {
351
		(*c)--;
352
	} else if (*cdir == 2) {
353
		(*c)++;
354
	}
355
	return 0;
356
}
357

358
static int boundary_lt(unsigned int a, int adir,
359
		       unsigned int b, int bdir)
360
{
361
	if (adir < 0) {
362
		a--;
363
		adir = 1;
364
	} else if (adir > 0)
365
		adir = 1;
366
	if (bdir < 0) {
367
		b--;
368
		bdir = 1;
369
	} else if (bdir > 0)
370
		bdir = 1;
371
	return a < b || (a == b && adir < bdir);
372
}
373

374
/* Return 1 if min is nearer to best than max */
375
static int boundary_nearer(int min, int mindir,
376
			   int best, int bestdir,
377
			   int max, int maxdir)
378
{
379
	int dmin, dmindir;
380
	int dmax, dmaxdir;
381
	boundary_sub(best, bestdir, min, mindir, &dmin, &dmindir);
382
	boundary_sub(max, maxdir, best, bestdir, &dmax, &dmaxdir);
383
	return boundary_lt(dmin, dmindir, dmax, dmaxdir);
384
}
385

386
/**
387
 * snd_pcm_hw_param_near
388
 * @pcm: PCM instance
389
 * @params: the hw_params instance
390
 * @var: parameter to retrieve
391
 * @best: value to set
392
 * @dir: pointer to the direction (-1,0,1) or NULL
393
 *
394
 * Inside configuration space defined by PARAMS set PAR to the available value
395
 * nearest to VAL. Reduce configuration space accordingly.
396
 * This function cannot be called for SNDRV_PCM_HW_PARAM_ACCESS,
397
 * SNDRV_PCM_HW_PARAM_FORMAT, SNDRV_PCM_HW_PARAM_SUBFORMAT.
398
 * Return the value found.
399
  */
400
static int snd_pcm_hw_param_near(struct snd_pcm_substream *pcm,
401
				 struct snd_pcm_hw_params *params,
402
				 snd_pcm_hw_param_t var, unsigned int best,
403
				 int *dir)
404
{
405
	struct snd_pcm_hw_params *save = NULL;
406
	int v;
407
	unsigned int saved_min;
408
	int last = 0;
409
	int min, max;
410
	int mindir, maxdir;
411
	int valdir = dir ? *dir : 0;
412
	/* FIXME */
413
	if (best > INT_MAX)
414
		best = INT_MAX;
415
	min = max = best;
416
	mindir = maxdir = valdir;
417
	if (maxdir > 0)
418
		maxdir = 0;
419
	else if (maxdir == 0)
420
		maxdir = -1;
421
	else {
422
		maxdir = 1;
423
		max--;
424
	}
425
	save = kmalloc(sizeof(*save), GFP_KERNEL);
426
	if (save == NULL)
427
		return -ENOMEM;
428
	*save = *params;
429
	saved_min = min;
430
	min = snd_pcm_hw_param_min(pcm, params, var, min, &mindir);
431
	if (min >= 0) {
432
		struct snd_pcm_hw_params *params1;
433
		if (max < 0)
434
			goto _end;
435
		if ((unsigned int)min == saved_min && mindir == valdir)
436
			goto _end;
437
		params1 = kmalloc(sizeof(*params1), GFP_KERNEL);
438
		if (params1 == NULL) {
439
			kfree(save);
440
			return -ENOMEM;
441
		}
442
		*params1 = *save;
443
		max = snd_pcm_hw_param_max(pcm, params1, var, max, &maxdir);
444
		if (max < 0) {
445
			kfree(params1);
446
			goto _end;
447
		}
448
		if (boundary_nearer(max, maxdir, best, valdir, min, mindir)) {
449
			*params = *params1;
450
			last = 1;
451
		}
452
		kfree(params1);
453
	} else {
454
		*params = *save;
455
		max = snd_pcm_hw_param_max(pcm, params, var, max, &maxdir);
456
		if (max < 0) {
457
			kfree(save);
458
			return max;
459
		}
460
		last = 1;
461
	}
462
 _end:
463
 	kfree(save);
464
	if (last)
465
		v = snd_pcm_hw_param_last(pcm, params, var, dir);
466
	else
467
		v = snd_pcm_hw_param_first(pcm, params, var, dir);
468
	snd_BUG_ON(v < 0);
469
	return v;
470
}
471

472
static int _snd_pcm_hw_param_set(struct snd_pcm_hw_params *params,
473
				 snd_pcm_hw_param_t var, unsigned int val,
474
				 int dir)
475
{
476
	int changed;
477
	if (hw_is_mask(var)) {
478
		struct snd_mask *m = hw_param_mask(params, var);
479
		if (val == 0 && dir < 0) {
480
			changed = -EINVAL;
481
			snd_mask_none(m);
482
		} else {
483
			if (dir > 0)
484
				val++;
485
			else if (dir < 0)
486
				val--;
487
			changed = snd_mask_refine_set(hw_param_mask(params, var), val);
488
		}
489
	} else if (hw_is_interval(var)) {
490
		struct snd_interval *i = hw_param_interval(params, var);
491
		if (val == 0 && dir < 0) {
492
			changed = -EINVAL;
493
			snd_interval_none(i);
494
		} else if (dir == 0)
495
			changed = snd_interval_refine_set(i, val);
496
		else {
497
			struct snd_interval t;
498
			t.openmin = 1;
499
			t.openmax = 1;
500
			t.empty = 0;
501
			t.integer = 0;
502
			if (dir < 0) {
503
				t.min = val - 1;
504
				t.max = val;
505
			} else {
506
				t.min = val;
507
				t.max = val+1;
508
			}
509
			changed = snd_interval_refine(i, &t);
510
		}
511
	} else
512
		return -EINVAL;
513
	if (changed) {
514
		params->cmask |= 1 << var;
515
		params->rmask |= 1 << var;
516
	}
517
	return changed;
518
}
519

520
/**
521
 * snd_pcm_hw_param_set
522
 * @pcm: PCM instance
523
 * @params: the hw_params instance
524
 * @var: parameter to retrieve
525
 * @val: value to set
526
 * @dir: pointer to the direction (-1,0,1) or NULL
527
 *
528
 * Inside configuration space defined by PARAMS remove from PAR all 
529
 * values != VAL. Reduce configuration space accordingly.
530
 *  Return VAL or -EINVAL if the configuration space is empty
531
 */
532
static int snd_pcm_hw_param_set(struct snd_pcm_substream *pcm,
533
				struct snd_pcm_hw_params *params,
534
				snd_pcm_hw_param_t var, unsigned int val,
535
				int dir)
536
{
537
	int changed = _snd_pcm_hw_param_set(params, var, val, dir);
538
	if (changed < 0)
539
		return changed;
540
	if (params->rmask) {
541
		int err = snd_pcm_hw_refine(pcm, params);
542
		if (err < 0)
543
			return err;
544
	}
545
	return snd_pcm_hw_param_value(params, var, NULL);
546
}
547

548
static int _snd_pcm_hw_param_setinteger(struct snd_pcm_hw_params *params,
549
					snd_pcm_hw_param_t var)
550
{
551
	int changed;
552
	changed = snd_interval_setinteger(hw_param_interval(params, var));
553
	if (changed) {
554
		params->cmask |= 1 << var;
555
		params->rmask |= 1 << var;
556
	}
557
	return changed;
558
}
559
	
560
/*
561
 * plugin
562
 */
563

564
#ifdef CONFIG_SND_PCM_OSS_PLUGINS
565
static int snd_pcm_oss_plugin_clear(struct snd_pcm_substream *substream)
566
{
567
	struct snd_pcm_runtime *runtime = substream->runtime;
568
	struct snd_pcm_plugin *plugin, *next;
569
	
570
	plugin = runtime->oss.plugin_first;
571
	while (plugin) {
572
		next = plugin->next;
573
		snd_pcm_plugin_free(plugin);
574
		plugin = next;
575
	}
576
	runtime->oss.plugin_first = runtime->oss.plugin_last = NULL;
577
	return 0;
578
}
579

580
static int snd_pcm_plugin_insert(struct snd_pcm_plugin *plugin)
581
{
582
	struct snd_pcm_runtime *runtime = plugin->plug->runtime;
583
	plugin->next = runtime->oss.plugin_first;
584
	plugin->prev = NULL;
585
	if (runtime->oss.plugin_first) {
586
		runtime->oss.plugin_first->prev = plugin;
587
		runtime->oss.plugin_first = plugin;
588
	} else {
589
		runtime->oss.plugin_last =
590
		runtime->oss.plugin_first = plugin;
591
	}
592
	return 0;
593
}
594

595
int snd_pcm_plugin_append(struct snd_pcm_plugin *plugin)
596
{
597
	struct snd_pcm_runtime *runtime = plugin->plug->runtime;
598
	plugin->next = NULL;
599
	plugin->prev = runtime->oss.plugin_last;
600
	if (runtime->oss.plugin_last) {
601
		runtime->oss.plugin_last->next = plugin;
602
		runtime->oss.plugin_last = plugin;
603
	} else {
604
		runtime->oss.plugin_last =
605
		runtime->oss.plugin_first = plugin;
606
	}
607
	return 0;
608
}
609
#endif /* CONFIG_SND_PCM_OSS_PLUGINS */
610

611
static long snd_pcm_oss_bytes(struct snd_pcm_substream *substream, long frames)
612
{
613
	struct snd_pcm_runtime *runtime = substream->runtime;
614
	long buffer_size = snd_pcm_lib_buffer_bytes(substream);
615
	long bytes = frames_to_bytes(runtime, frames);
616
	if (buffer_size == runtime->oss.buffer_bytes)
617
		return bytes;
618
#if BITS_PER_LONG >= 64
619
	return runtime->oss.buffer_bytes * bytes / buffer_size;
620
#else
621
	{
622
		u64 bsize = (u64)runtime->oss.buffer_bytes * (u64)bytes;
623
		return div_u64(bsize, buffer_size);
624
	}
625
#endif
626
}
627

628
static long snd_pcm_alsa_frames(struct snd_pcm_substream *substream, long bytes)
629
{
630
	struct snd_pcm_runtime *runtime = substream->runtime;
631
	long buffer_size = snd_pcm_lib_buffer_bytes(substream);
632
	if (buffer_size == runtime->oss.buffer_bytes)
633
		return bytes_to_frames(runtime, bytes);
634
	return bytes_to_frames(runtime, (buffer_size * bytes) / runtime->oss.buffer_bytes);
635
}
636

637
static inline
638
snd_pcm_uframes_t get_hw_ptr_period(struct snd_pcm_runtime *runtime)
639
{
640
	return runtime->hw_ptr_interrupt;
641
}
642

643
/* define extended formats in the recent OSS versions (if any) */
644
/* linear formats */
645
#define AFMT_S32_LE      0x00001000
646
#define AFMT_S32_BE      0x00002000
647
#define AFMT_S24_LE      0x00008000
648
#define AFMT_S24_BE      0x00010000
649
#define AFMT_S24_PACKED  0x00040000
650

651
/* other supported formats */
652
#define AFMT_FLOAT       0x00004000
653
#define AFMT_SPDIF_RAW   0x00020000
654

655
/* unsupported formats */
656
#define AFMT_AC3         0x00000400
657
#define AFMT_VORBIS      0x00000800
658

659
static snd_pcm_format_t snd_pcm_oss_format_from(int format)
660
{
661
	switch (format) {
662
	case AFMT_MU_LAW:	return SNDRV_PCM_FORMAT_MU_LAW;
663
	case AFMT_A_LAW:	return SNDRV_PCM_FORMAT_A_LAW;
664
	case AFMT_IMA_ADPCM:	return SNDRV_PCM_FORMAT_IMA_ADPCM;
665
	case AFMT_U8:		return SNDRV_PCM_FORMAT_U8;
666
	case AFMT_S16_LE:	return SNDRV_PCM_FORMAT_S16_LE;
667
	case AFMT_S16_BE:	return SNDRV_PCM_FORMAT_S16_BE;
668
	case AFMT_S8:		return SNDRV_PCM_FORMAT_S8;
669
	case AFMT_U16_LE:	return SNDRV_PCM_FORMAT_U16_LE;
670
	case AFMT_U16_BE:	return SNDRV_PCM_FORMAT_U16_BE;
671
	case AFMT_MPEG:		return SNDRV_PCM_FORMAT_MPEG;
672
	case AFMT_S32_LE:	return SNDRV_PCM_FORMAT_S32_LE;
673
	case AFMT_S32_BE:	return SNDRV_PCM_FORMAT_S32_BE;
674
	case AFMT_S24_LE:	return SNDRV_PCM_FORMAT_S24_LE;
675
	case AFMT_S24_BE:	return SNDRV_PCM_FORMAT_S24_BE;
676
	case AFMT_S24_PACKED:	return SNDRV_PCM_FORMAT_S24_3LE;
677
	case AFMT_FLOAT:	return SNDRV_PCM_FORMAT_FLOAT;
678
	case AFMT_SPDIF_RAW:	return SNDRV_PCM_FORMAT_IEC958_SUBFRAME;
679
	default:		return SNDRV_PCM_FORMAT_U8;
680
	}
681
}
682

683
static int snd_pcm_oss_format_to(snd_pcm_format_t format)
684
{
685
	switch (format) {
686
	case SNDRV_PCM_FORMAT_MU_LAW:	return AFMT_MU_LAW;
687
	case SNDRV_PCM_FORMAT_A_LAW:	return AFMT_A_LAW;
688
	case SNDRV_PCM_FORMAT_IMA_ADPCM:	return AFMT_IMA_ADPCM;
689
	case SNDRV_PCM_FORMAT_U8:		return AFMT_U8;
690
	case SNDRV_PCM_FORMAT_S16_LE:	return AFMT_S16_LE;
691
	case SNDRV_PCM_FORMAT_S16_BE:	return AFMT_S16_BE;
692
	case SNDRV_PCM_FORMAT_S8:		return AFMT_S8;
693
	case SNDRV_PCM_FORMAT_U16_LE:	return AFMT_U16_LE;
694
	case SNDRV_PCM_FORMAT_U16_BE:	return AFMT_U16_BE;
695
	case SNDRV_PCM_FORMAT_MPEG:		return AFMT_MPEG;
696
	case SNDRV_PCM_FORMAT_S32_LE:	return AFMT_S32_LE;
697
	case SNDRV_PCM_FORMAT_S32_BE:	return AFMT_S32_BE;
698
	case SNDRV_PCM_FORMAT_S24_LE:	return AFMT_S24_LE;
699
	case SNDRV_PCM_FORMAT_S24_BE:	return AFMT_S24_BE;
700
	case SNDRV_PCM_FORMAT_S24_3LE:	return AFMT_S24_PACKED;
701
	case SNDRV_PCM_FORMAT_FLOAT:	return AFMT_FLOAT;
702
	case SNDRV_PCM_FORMAT_IEC958_SUBFRAME: return AFMT_SPDIF_RAW;
703
	default:			return -EINVAL;
704
	}
705
}
706

707
static int snd_pcm_oss_period_size(struct snd_pcm_substream *substream, 
708
				   struct snd_pcm_hw_params *oss_params,
709
				   struct snd_pcm_hw_params *slave_params)
710
{
711
	size_t s;
712
	size_t oss_buffer_size, oss_period_size, oss_periods;
713
	size_t min_period_size, max_period_size;
714
	struct snd_pcm_runtime *runtime = substream->runtime;
715
	size_t oss_frame_size;
716

717
	oss_frame_size = snd_pcm_format_physical_width(params_format(oss_params)) *
718
			 params_channels(oss_params) / 8;
719

720
	oss_buffer_size = snd_pcm_plug_client_size(substream,
721
						   snd_pcm_hw_param_value_max(slave_params, SNDRV_PCM_HW_PARAM_BUFFER_SIZE, NULL)) * oss_frame_size;
722
	oss_buffer_size = 1 << ld2(oss_buffer_size);
723
	if (atomic_read(&substream->mmap_count)) {
724
		if (oss_buffer_size > runtime->oss.mmap_bytes)
725
			oss_buffer_size = runtime->oss.mmap_bytes;
726
	}
727

728
	if (substream->oss.setup.period_size > 16)
729
		oss_period_size = substream->oss.setup.period_size;
730
	else if (runtime->oss.fragshift) {
731
		oss_period_size = 1 << runtime->oss.fragshift;
732
		if (oss_period_size > oss_buffer_size / 2)
733
			oss_period_size = oss_buffer_size / 2;
734
	} else {
735
		int sd;
736
		size_t bytes_per_sec = params_rate(oss_params) * snd_pcm_format_physical_width(params_format(oss_params)) * params_channels(oss_params) / 8;
737

738
		oss_period_size = oss_buffer_size;
739
		do {
740
			oss_period_size /= 2;
741
		} while (oss_period_size > bytes_per_sec);
742
		if (runtime->oss.subdivision == 0) {
743
			sd = 4;
744
			if (oss_period_size / sd > 4096)
745
				sd *= 2;
746
			if (oss_period_size / sd < 4096)
747
				sd = 1;
748
		} else
749
			sd = runtime->oss.subdivision;
750
		oss_period_size /= sd;
751
		if (oss_period_size < 16)
752
			oss_period_size = 16;
753
	}
754

755
	min_period_size = snd_pcm_plug_client_size(substream,
756
						   snd_pcm_hw_param_value_min(slave_params, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, NULL));
757
	min_period_size *= oss_frame_size;
758
	min_period_size = 1 << (ld2(min_period_size - 1) + 1);
759
	if (oss_period_size < min_period_size)
760
		oss_period_size = min_period_size;
761

762
	max_period_size = snd_pcm_plug_client_size(substream,
763
						   snd_pcm_hw_param_value_max(slave_params, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, NULL));
764
	max_period_size *= oss_frame_size;
765
	max_period_size = 1 << ld2(max_period_size);
766
	if (oss_period_size > max_period_size)
767
		oss_period_size = max_period_size;
768

769
	oss_periods = oss_buffer_size / oss_period_size;
770

771
	if (substream->oss.setup.periods > 1)
772
		oss_periods = substream->oss.setup.periods;
773

774
	s = snd_pcm_hw_param_value_max(slave_params, SNDRV_PCM_HW_PARAM_PERIODS, NULL);
775
	if (runtime->oss.maxfrags && s > runtime->oss.maxfrags)
776
		s = runtime->oss.maxfrags;
777
	if (oss_periods > s)
778
		oss_periods = s;
779

780
	s = snd_pcm_hw_param_value_min(slave_params, SNDRV_PCM_HW_PARAM_PERIODS, NULL);
781
	if (s < 2)
782
		s = 2;
783
	if (oss_periods < s)
784
		oss_periods = s;
785

786
	while (oss_period_size * oss_periods > oss_buffer_size)
787
		oss_period_size /= 2;
788

789
	if (oss_period_size < 16)
790
		return -EINVAL;
791
	runtime->oss.period_bytes = oss_period_size;
792
	runtime->oss.period_frames = 1;
793
	runtime->oss.periods = oss_periods;
794
	return 0;
795
}
796

797
static int choose_rate(struct snd_pcm_substream *substream,
798
		       struct snd_pcm_hw_params *params, unsigned int best_rate)
799
{
800
	struct snd_interval *it;
801
	struct snd_pcm_hw_params *save;
802
	unsigned int rate, prev;
803

804
	save = kmalloc(sizeof(*save), GFP_KERNEL);
805
	if (save == NULL)
806
		return -ENOMEM;
807
	*save = *params;
808
	it = hw_param_interval(save, SNDRV_PCM_HW_PARAM_RATE);
809

810
	/* try multiples of the best rate */
811
	rate = best_rate;
812
	for (;;) {
813
		if (it->max < rate || (it->max == rate && it->openmax))
814
			break;
815
		if (it->min < rate || (it->min == rate && !it->openmin)) {
816
			int ret;
817
			ret = snd_pcm_hw_param_set(substream, params,
818
						   SNDRV_PCM_HW_PARAM_RATE,
819
						   rate, 0);
820
			if (ret == (int)rate) {
821
				kfree(save);
822
				return rate;
823
			}
824
			*params = *save;
825
		}
826
		prev = rate;
827
		rate += best_rate;
828
		if (rate <= prev)
829
			break;
830
	}
831

832
	/* not found, use the nearest rate */
833
	kfree(save);
834
	return snd_pcm_hw_param_near(substream, params, SNDRV_PCM_HW_PARAM_RATE, best_rate, NULL);
835
}
836

837
static int snd_pcm_oss_change_params(struct snd_pcm_substream *substream)
838
{
839
	struct snd_pcm_runtime *runtime = substream->runtime;
840
	struct snd_pcm_hw_params *params, *sparams;
841
	struct snd_pcm_sw_params *sw_params;
842
	ssize_t oss_buffer_size, oss_period_size;
843
	size_t oss_frame_size;
844
	int err;
845
	int direct;
846
	snd_pcm_format_t format, sformat;
847
	int n;
848
	struct snd_mask sformat_mask;
849
	struct snd_mask mask;
850

851
	if (mutex_lock_interruptible(&runtime->oss.params_lock))
852
		return -EINTR;
853
	sw_params = kmalloc(sizeof(*sw_params), GFP_KERNEL);
854
	params = kmalloc(sizeof(*params), GFP_KERNEL);
855
	sparams = kmalloc(sizeof(*sparams), GFP_KERNEL);
856
	if (!sw_params || !params || !sparams) {
857
		snd_printd("No memory\n");
858
		err = -ENOMEM;
859
		goto failure;
860
	}
861

862
	if (atomic_read(&substream->mmap_count))
863
		direct = 1;
864
	else
865
		direct = substream->oss.setup.direct;
866

867
	_snd_pcm_hw_params_any(sparams);
868
	_snd_pcm_hw_param_setinteger(sparams, SNDRV_PCM_HW_PARAM_PERIODS);
869
	_snd_pcm_hw_param_min(sparams, SNDRV_PCM_HW_PARAM_PERIODS, 2, 0);
870
	snd_mask_none(&mask);
871
	if (atomic_read(&substream->mmap_count))
872
		snd_mask_set(&mask, (__force int)SNDRV_PCM_ACCESS_MMAP_INTERLEAVED);
873
	else {
874
		snd_mask_set(&mask, (__force int)SNDRV_PCM_ACCESS_RW_INTERLEAVED);
875
		if (!direct)
876
			snd_mask_set(&mask, (__force int)SNDRV_PCM_ACCESS_RW_NONINTERLEAVED);
877
	}
878
	err = snd_pcm_hw_param_mask(substream, sparams, SNDRV_PCM_HW_PARAM_ACCESS, &mask);
879
	if (err < 0) {
880
		snd_printd("No usable accesses\n");
881
		err = -EINVAL;
882
		goto failure;
883
	}
884
	choose_rate(substream, sparams, runtime->oss.rate);
885
	snd_pcm_hw_param_near(substream, sparams, SNDRV_PCM_HW_PARAM_CHANNELS, runtime->oss.channels, NULL);
886

887
	format = snd_pcm_oss_format_from(runtime->oss.format);
888

889
	sformat_mask = *hw_param_mask(sparams, SNDRV_PCM_HW_PARAM_FORMAT);
890
	if (direct)
891
		sformat = format;
892
	else
893
		sformat = snd_pcm_plug_slave_format(format, &sformat_mask);
894

895
	if ((__force int)sformat < 0 ||
896
	    !snd_mask_test(&sformat_mask, (__force int)sformat)) {
897
		for (sformat = (__force snd_pcm_format_t)0;
898
		     (__force int)sformat <= (__force int)SNDRV_PCM_FORMAT_LAST;
899
		     sformat = (__force snd_pcm_format_t)((__force int)sformat + 1)) {
900
			if (snd_mask_test(&sformat_mask, (__force int)sformat) &&
901
			    snd_pcm_oss_format_to(sformat) >= 0)
902
				break;
903
		}
904
		if ((__force int)sformat > (__force int)SNDRV_PCM_FORMAT_LAST) {
905
			snd_printd("Cannot find a format!!!\n");
906
			err = -EINVAL;
907
			goto failure;
908
		}
909
	}
910
	err = _snd_pcm_hw_param_set(sparams, SNDRV_PCM_HW_PARAM_FORMAT, (__force int)sformat, 0);
911
	if (err < 0)
912
		goto failure;
913

914
	if (direct) {
915
		memcpy(params, sparams, sizeof(*params));
916
	} else {
917
		_snd_pcm_hw_params_any(params);
918
		_snd_pcm_hw_param_set(params, SNDRV_PCM_HW_PARAM_ACCESS,
919
				      (__force int)SNDRV_PCM_ACCESS_RW_INTERLEAVED, 0);
920
		_snd_pcm_hw_param_set(params, SNDRV_PCM_HW_PARAM_FORMAT,
921
				      (__force int)snd_pcm_oss_format_from(runtime->oss.format), 0);
922
		_snd_pcm_hw_param_set(params, SNDRV_PCM_HW_PARAM_CHANNELS,
923
				      runtime->oss.channels, 0);
924
		_snd_pcm_hw_param_set(params, SNDRV_PCM_HW_PARAM_RATE,
925
				      runtime->oss.rate, 0);
926
		pdprintf("client: access = %i, format = %i, channels = %i, rate = %i\n",
927
			 params_access(params), params_format(params),
928
			 params_channels(params), params_rate(params));
929
	}
930
	pdprintf("slave: access = %i, format = %i, channels = %i, rate = %i\n",
931
		 params_access(sparams), params_format(sparams),
932
		 params_channels(sparams), params_rate(sparams));
933

934
	oss_frame_size = snd_pcm_format_physical_width(params_format(params)) *
935
			 params_channels(params) / 8;
936

937
#ifdef CONFIG_SND_PCM_OSS_PLUGINS
938
	snd_pcm_oss_plugin_clear(substream);
939
	if (!direct) {
940
		/* add necessary plugins */
941
		snd_pcm_oss_plugin_clear(substream);
942
		if ((err = snd_pcm_plug_format_plugins(substream,
943
						       params, 
944
						       sparams)) < 0) {
945
			snd_printd("snd_pcm_plug_format_plugins failed: %i\n", err);
946
			snd_pcm_oss_plugin_clear(substream);
947
			goto failure;
948
		}
949
		if (runtime->oss.plugin_first) {
950
			struct snd_pcm_plugin *plugin;
951
			if ((err = snd_pcm_plugin_build_io(substream, sparams, &plugin)) < 0) {
952
				snd_printd("snd_pcm_plugin_build_io failed: %i\n", err);
953
				snd_pcm_oss_plugin_clear(substream);
954
				goto failure;
955
			}
956
			if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
957
				err = snd_pcm_plugin_append(plugin);
958
			} else {
959
				err = snd_pcm_plugin_insert(plugin);
960
			}
961
			if (err < 0) {
962
				snd_pcm_oss_plugin_clear(substream);
963
				goto failure;
964
			}
965
		}
966
	}
967
#endif
968

969
	err = snd_pcm_oss_period_size(substream, params, sparams);
970
	if (err < 0)
971
		goto failure;
972

973
	n = snd_pcm_plug_slave_size(substream, runtime->oss.period_bytes / oss_frame_size);
974
	err = snd_pcm_hw_param_near(substream, sparams, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, n, NULL);
975
	if (err < 0)
976
		goto failure;
977

978
	err = snd_pcm_hw_param_near(substream, sparams, SNDRV_PCM_HW_PARAM_PERIODS,
979
				     runtime->oss.periods, NULL);
980
	if (err < 0)
981
		goto failure;
982

983
	snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DROP, NULL);
984

985
	if ((err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_HW_PARAMS, sparams)) < 0) {
986
		snd_printd("HW_PARAMS failed: %i\n", err);
987
		goto failure;
988
	}
989

990
	memset(sw_params, 0, sizeof(*sw_params));
991
	if (runtime->oss.trigger) {
992
		sw_params->start_threshold = 1;
993
	} else {
994
		sw_params->start_threshold = runtime->boundary;
995
	}
996
	if (atomic_read(&substream->mmap_count) ||
997
	    substream->stream == SNDRV_PCM_STREAM_CAPTURE)
998
		sw_params->stop_threshold = runtime->boundary;
999
	else
1000
		sw_params->stop_threshold = runtime->buffer_size;
1001
	sw_params->tstamp_mode = SNDRV_PCM_TSTAMP_NONE;
1002
	sw_params->period_step = 1;
1003
	sw_params->avail_min = substream->stream == SNDRV_PCM_STREAM_PLAYBACK ?
1004
		1 : runtime->period_size;
1005
	if (atomic_read(&substream->mmap_count) ||
1006
	    substream->oss.setup.nosilence) {
1007
		sw_params->silence_threshold = 0;
1008
		sw_params->silence_size = 0;
1009
	} else {
1010
		snd_pcm_uframes_t frames;
1011
		frames = runtime->period_size + 16;
1012
		if (frames > runtime->buffer_size)
1013
			frames = runtime->buffer_size;
1014
		sw_params->silence_threshold = frames;
1015
		sw_params->silence_size = frames;
1016
	}
1017

1018
	if ((err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_SW_PARAMS, sw_params)) < 0) {
1019
		snd_printd("SW_PARAMS failed: %i\n", err);
1020
		goto failure;
1021
	}
1022

1023
	runtime->oss.periods = params_periods(sparams);
1024
	oss_period_size = snd_pcm_plug_client_size(substream, params_period_size(sparams));
1025
	if (oss_period_size < 0) {
1026
		err = -EINVAL;
1027
		goto failure;
1028
	}
1029
#ifdef CONFIG_SND_PCM_OSS_PLUGINS
1030
	if (runtime->oss.plugin_first) {
1031
		err = snd_pcm_plug_alloc(substream, oss_period_size);
1032
		if (err < 0)
1033
			goto failure;
1034
	}
1035
#endif
1036
	oss_period_size *= oss_frame_size;
1037

1038
	oss_buffer_size = oss_period_size * runtime->oss.periods;
1039
	if (oss_buffer_size < 0) {
1040
		err = -EINVAL;
1041
		goto failure;
1042
	}
1043

1044
	runtime->oss.period_bytes = oss_period_size;
1045
	runtime->oss.buffer_bytes = oss_buffer_size;
1046

1047
	pdprintf("oss: period bytes = %i, buffer bytes = %i\n",
1048
		 runtime->oss.period_bytes,
1049
		 runtime->oss.buffer_bytes);
1050
	pdprintf("slave: period_size = %i, buffer_size = %i\n",
1051
		 params_period_size(sparams),
1052
		 params_buffer_size(sparams));
1053

1054
	runtime->oss.format = snd_pcm_oss_format_to(params_format(params));
1055
	runtime->oss.channels = params_channels(params);
1056
	runtime->oss.rate = params_rate(params);
1057

1058
	vfree(runtime->oss.buffer);
1059
	runtime->oss.buffer = vmalloc(runtime->oss.period_bytes);
1060
	if (!runtime->oss.buffer) {
1061
		err = -ENOMEM;
1062
		goto failure;
1063
	}
1064

1065
	runtime->oss.params = 0;
1066
	runtime->oss.prepare = 1;
1067
	runtime->oss.buffer_used = 0;
1068
	if (runtime->dma_area)
1069
		snd_pcm_format_set_silence(runtime->format, runtime->dma_area, bytes_to_samples(runtime, runtime->dma_bytes));
1070

1071
	runtime->oss.period_frames = snd_pcm_alsa_frames(substream, oss_period_size);
1072

1073
	err = 0;
1074
failure:
1075
	kfree(sw_params);
1076
	kfree(params);
1077
	kfree(sparams);
1078
	mutex_unlock(&runtime->oss.params_lock);
1079
	return err;
1080
}
1081

1082
static int snd_pcm_oss_get_active_substream(struct snd_pcm_oss_file *pcm_oss_file, struct snd_pcm_substream **r_substream)
1083
{
1084
	int idx, err;
1085
	struct snd_pcm_substream *asubstream = NULL, *substream;
1086

1087
	for (idx = 0; idx < 2; idx++) {
1088
		substream = pcm_oss_file->streams[idx];
1089
		if (substream == NULL)
1090
			continue;
1091
		if (asubstream == NULL)
1092
			asubstream = substream;
1093
		if (substream->runtime->oss.params) {
1094
			err = snd_pcm_oss_change_params(substream);
1095
			if (err < 0)
1096
				return err;
1097
		}
1098
	}
1099
	if (!asubstream)
1100
		return -EIO;
1101
	if (r_substream)
1102
		*r_substream = asubstream;
1103
	return 0;
1104
}
1105

1106
static int snd_pcm_oss_prepare(struct snd_pcm_substream *substream)
1107
{
1108
	int err;
1109
	struct snd_pcm_runtime *runtime = substream->runtime;
1110

1111
	err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_PREPARE, NULL);
1112
	if (err < 0) {
1113
		snd_printd("snd_pcm_oss_prepare: SNDRV_PCM_IOCTL_PREPARE failed\n");
1114
		return err;
1115
	}
1116
	runtime->oss.prepare = 0;
1117
	runtime->oss.prev_hw_ptr_period = 0;
1118
	runtime->oss.period_ptr = 0;
1119
	runtime->oss.buffer_used = 0;
1120

1121
	return 0;
1122
}
1123

1124
static int snd_pcm_oss_make_ready(struct snd_pcm_substream *substream)
1125
{
1126
	struct snd_pcm_runtime *runtime;
1127
	int err;
1128

1129
	if (substream == NULL)
1130
		return 0;
1131
	runtime = substream->runtime;
1132
	if (runtime->oss.params) {
1133
		err = snd_pcm_oss_change_params(substream);
1134
		if (err < 0)
1135
			return err;
1136
	}
1137
	if (runtime->oss.prepare) {
1138
		err = snd_pcm_oss_prepare(substream);
1139
		if (err < 0)
1140
			return err;
1141
	}
1142
	return 0;
1143
}
1144

1145
static int snd_pcm_oss_capture_position_fixup(struct snd_pcm_substream *substream, snd_pcm_sframes_t *delay)
1146
{
1147
	struct snd_pcm_runtime *runtime;
1148
	snd_pcm_uframes_t frames;
1149
	int err = 0;
1150

1151
	while (1) {
1152
		err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DELAY, delay);
1153
		if (err < 0)
1154
			break;
1155
		runtime = substream->runtime;
1156
		if (*delay <= (snd_pcm_sframes_t)runtime->buffer_size)
1157
			break;
1158
		/* in case of overrun, skip whole periods like OSS/Linux driver does */
1159
		/* until avail(delay) <= buffer_size */
1160
		frames = (*delay - runtime->buffer_size) + runtime->period_size - 1;
1161
		frames /= runtime->period_size;
1162
		frames *= runtime->period_size;
1163
		err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_FORWARD, &frames);
1164
		if (err < 0)
1165
			break;
1166
	}
1167
	return err;
1168
}
1169

1170
snd_pcm_sframes_t snd_pcm_oss_write3(struct snd_pcm_substream *substream, const char *ptr, snd_pcm_uframes_t frames, int in_kernel)
1171
{
1172
	struct snd_pcm_runtime *runtime = substream->runtime;
1173
	int ret;
1174
	while (1) {
1175
		if (runtime->status->state == SNDRV_PCM_STATE_XRUN ||
1176
		    runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) {
1177
#ifdef OSS_DEBUG
1178
			if (runtime->status->state == SNDRV_PCM_STATE_XRUN)
1179
				printk(KERN_DEBUG "pcm_oss: write: "
1180
				       "recovering from XRUN\n");
1181
			else
1182
				printk(KERN_DEBUG "pcm_oss: write: "
1183
				       "recovering from SUSPEND\n");
1184
#endif
1185
			ret = snd_pcm_oss_prepare(substream);
1186
			if (ret < 0)
1187
				break;
1188
		}
1189
		if (in_kernel) {
1190
			mm_segment_t fs;
1191
			fs = snd_enter_user();
1192
			ret = snd_pcm_lib_write(substream, (void __force __user *)ptr, frames);
1193
			snd_leave_user(fs);
1194
		} else {
1195
			ret = snd_pcm_lib_write(substream, (void __force __user *)ptr, frames);
1196
		}
1197
		if (ret != -EPIPE && ret != -ESTRPIPE)
1198
			break;
1199
		/* test, if we can't store new data, because the stream */
1200
		/* has not been started */
1201
		if (runtime->status->state == SNDRV_PCM_STATE_PREPARED)
1202
			return -EAGAIN;
1203
	}
1204
	return ret;
1205
}
1206

1207
snd_pcm_sframes_t snd_pcm_oss_read3(struct snd_pcm_substream *substream, char *ptr, snd_pcm_uframes_t frames, int in_kernel)
1208
{
1209
	struct snd_pcm_runtime *runtime = substream->runtime;
1210
	snd_pcm_sframes_t delay;
1211
	int ret;
1212
	while (1) {
1213
		if (runtime->status->state == SNDRV_PCM_STATE_XRUN ||
1214
		    runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) {
1215
#ifdef OSS_DEBUG
1216
			if (runtime->status->state == SNDRV_PCM_STATE_XRUN)
1217
				printk(KERN_DEBUG "pcm_oss: read: "
1218
				       "recovering from XRUN\n");
1219
			else
1220
				printk(KERN_DEBUG "pcm_oss: read: "
1221
				       "recovering from SUSPEND\n");
1222
#endif
1223
			ret = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DRAIN, NULL);
1224
			if (ret < 0)
1225
				break;
1226
		} else if (runtime->status->state == SNDRV_PCM_STATE_SETUP) {
1227
			ret = snd_pcm_oss_prepare(substream);
1228
			if (ret < 0)
1229
				break;
1230
		}
1231
		ret = snd_pcm_oss_capture_position_fixup(substream, &delay);
1232
		if (ret < 0)
1233
			break;
1234
		if (in_kernel) {
1235
			mm_segment_t fs;
1236
			fs = snd_enter_user();
1237
			ret = snd_pcm_lib_read(substream, (void __force __user *)ptr, frames);
1238
			snd_leave_user(fs);
1239
		} else {
1240
			ret = snd_pcm_lib_read(substream, (void __force __user *)ptr, frames);
1241
		}
1242
		if (ret == -EPIPE) {
1243
			if (runtime->status->state == SNDRV_PCM_STATE_DRAINING) {
1244
				ret = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DROP, NULL);
1245
				if (ret < 0)
1246
					break;
1247
			}
1248
			continue;
1249
		}
1250
		if (ret != -ESTRPIPE)
1251
			break;
1252
	}
1253
	return ret;
1254
}
1255

1256
snd_pcm_sframes_t snd_pcm_oss_writev3(struct snd_pcm_substream *substream, void **bufs, snd_pcm_uframes_t frames, int in_kernel)
1257
{
1258
	struct snd_pcm_runtime *runtime = substream->runtime;
1259
	int ret;
1260
	while (1) {
1261
		if (runtime->status->state == SNDRV_PCM_STATE_XRUN ||
1262
		    runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) {
1263
#ifdef OSS_DEBUG
1264
			if (runtime->status->state == SNDRV_PCM_STATE_XRUN)
1265
				printk(KERN_DEBUG "pcm_oss: writev: "
1266
				       "recovering from XRUN\n");
1267
			else
1268
				printk(KERN_DEBUG "pcm_oss: writev: "
1269
				       "recovering from SUSPEND\n");
1270
#endif
1271
			ret = snd_pcm_oss_prepare(substream);
1272
			if (ret < 0)
1273
				break;
1274
		}
1275
		if (in_kernel) {
1276
			mm_segment_t fs;
1277
			fs = snd_enter_user();
1278
			ret = snd_pcm_lib_writev(substream, (void __user **)bufs, frames);
1279
			snd_leave_user(fs);
1280
		} else {
1281
			ret = snd_pcm_lib_writev(substream, (void __user **)bufs, frames);
1282
		}
1283
		if (ret != -EPIPE && ret != -ESTRPIPE)
1284
			break;
1285

1286
		/* test, if we can't store new data, because the stream */
1287
		/* has not been started */
1288
		if (runtime->status->state == SNDRV_PCM_STATE_PREPARED)
1289
			return -EAGAIN;
1290
	}
1291
	return ret;
1292
}
1293
	
1294
snd_pcm_sframes_t snd_pcm_oss_readv3(struct snd_pcm_substream *substream, void **bufs, snd_pcm_uframes_t frames, int in_kernel)
1295
{
1296
	struct snd_pcm_runtime *runtime = substream->runtime;
1297
	int ret;
1298
	while (1) {
1299
		if (runtime->status->state == SNDRV_PCM_STATE_XRUN ||
1300
		    runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) {
1301
#ifdef OSS_DEBUG
1302
			if (runtime->status->state == SNDRV_PCM_STATE_XRUN)
1303
				printk(KERN_DEBUG "pcm_oss: readv: "
1304
				       "recovering from XRUN\n");
1305
			else
1306
				printk(KERN_DEBUG "pcm_oss: readv: "
1307
				       "recovering from SUSPEND\n");
1308
#endif
1309
			ret = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DRAIN, NULL);
1310
			if (ret < 0)
1311
				break;
1312
		} else if (runtime->status->state == SNDRV_PCM_STATE_SETUP) {
1313
			ret = snd_pcm_oss_prepare(substream);
1314
			if (ret < 0)
1315
				break;
1316
		}
1317
		if (in_kernel) {
1318
			mm_segment_t fs;
1319
			fs = snd_enter_user();
1320
			ret = snd_pcm_lib_readv(substream, (void __user **)bufs, frames);
1321
			snd_leave_user(fs);
1322
		} else {
1323
			ret = snd_pcm_lib_readv(substream, (void __user **)bufs, frames);
1324
		}
1325
		if (ret != -EPIPE && ret != -ESTRPIPE)
1326
			break;
1327
	}
1328
	return ret;
1329
}
1330

1331
static ssize_t snd_pcm_oss_write2(struct snd_pcm_substream *substream, const char *buf, size_t bytes, int in_kernel)
1332
{
1333
	struct snd_pcm_runtime *runtime = substream->runtime;
1334
	snd_pcm_sframes_t frames, frames1;
1335
#ifdef CONFIG_SND_PCM_OSS_PLUGINS
1336
	if (runtime->oss.plugin_first) {
1337
		struct snd_pcm_plugin_channel *channels;
1338
		size_t oss_frame_bytes = (runtime->oss.plugin_first->src_width * runtime->oss.plugin_first->src_format.channels) / 8;
1339
		if (!in_kernel) {
1340
			if (copy_from_user(runtime->oss.buffer, (const char __force __user *)buf, bytes))
1341
				return -EFAULT;
1342
			buf = runtime->oss.buffer;
1343
		}
1344
		frames = bytes / oss_frame_bytes;
1345
		frames1 = snd_pcm_plug_client_channels_buf(substream, (char *)buf, frames, &channels);
1346
		if (frames1 < 0)
1347
			return frames1;
1348
		frames1 = snd_pcm_plug_write_transfer(substream, channels, frames1);
1349
		if (frames1 <= 0)
1350
			return frames1;
1351
		bytes = frames1 * oss_frame_bytes;
1352
	} else
1353
#endif
1354
	{
1355
		frames = bytes_to_frames(runtime, bytes);
1356
		frames1 = snd_pcm_oss_write3(substream, buf, frames, in_kernel);
1357
		if (frames1 <= 0)
1358
			return frames1;
1359
		bytes = frames_to_bytes(runtime, frames1);
1360
	}
1361
	return bytes;
1362
}
1363

1364
static ssize_t snd_pcm_oss_write1(struct snd_pcm_substream *substream, const char __user *buf, size_t bytes)
1365
{
1366
	size_t xfer = 0;
1367
	ssize_t tmp;
1368
	struct snd_pcm_runtime *runtime = substream->runtime;
1369

1370
	if (atomic_read(&substream->mmap_count))
1371
		return -ENXIO;
1372

1373
	if ((tmp = snd_pcm_oss_make_ready(substream)) < 0)
1374
		return tmp;
1375
	mutex_lock(&runtime->oss.params_lock);
1376
	while (bytes > 0) {
1377
		if (bytes < runtime->oss.period_bytes || runtime->oss.buffer_used > 0) {
1378
			tmp = bytes;
1379
			if (tmp + runtime->oss.buffer_used > runtime->oss.period_bytes)
1380
				tmp = runtime->oss.period_bytes - runtime->oss.buffer_used;
1381
			if (tmp > 0) {
1382
				if (copy_from_user(runtime->oss.buffer + runtime->oss.buffer_used, buf, tmp)) {
1383
					tmp = -EFAULT;
1384
					goto err;
1385
				}
1386
			}
1387
			runtime->oss.buffer_used += tmp;
1388
			buf += tmp;
1389
			bytes -= tmp;
1390
			xfer += tmp;
1391
			if (substream->oss.setup.partialfrag ||
1392
			    runtime->oss.buffer_used == runtime->oss.period_bytes) {
1393
				tmp = snd_pcm_oss_write2(substream, runtime->oss.buffer + runtime->oss.period_ptr, 
1394
							 runtime->oss.buffer_used - runtime->oss.period_ptr, 1);
1395
				if (tmp <= 0)
1396
					goto err;
1397
				runtime->oss.bytes += tmp;
1398
				runtime->oss.period_ptr += tmp;
1399
				runtime->oss.period_ptr %= runtime->oss.period_bytes;
1400
				if (runtime->oss.period_ptr == 0 ||
1401
				    runtime->oss.period_ptr == runtime->oss.buffer_used)
1402
					runtime->oss.buffer_used = 0;
1403
				else if ((substream->f_flags & O_NONBLOCK) != 0) {
1404
					tmp = -EAGAIN;
1405
					goto err;
1406
				}
1407
			}
1408
		} else {
1409
			tmp = snd_pcm_oss_write2(substream,
1410
						 (const char __force *)buf,
1411
						 runtime->oss.period_bytes, 0);
1412
			if (tmp <= 0)
1413
				goto err;
1414
			runtime->oss.bytes += tmp;
1415
			buf += tmp;
1416
			bytes -= tmp;
1417
			xfer += tmp;
1418
			if ((substream->f_flags & O_NONBLOCK) != 0 &&
1419
			    tmp != runtime->oss.period_bytes)
1420
				break;
1421
		}
1422
	}
1423
	mutex_unlock(&runtime->oss.params_lock);
1424
	return xfer;
1425

1426
 err:
1427
	mutex_unlock(&runtime->oss.params_lock);
1428
	return xfer > 0 ? (snd_pcm_sframes_t)xfer : tmp;
1429
}
1430

1431
static ssize_t snd_pcm_oss_read2(struct snd_pcm_substream *substream, char *buf, size_t bytes, int in_kernel)
1432
{
1433
	struct snd_pcm_runtime *runtime = substream->runtime;
1434
	snd_pcm_sframes_t frames, frames1;
1435
#ifdef CONFIG_SND_PCM_OSS_PLUGINS
1436
	char __user *final_dst = (char __force __user *)buf;
1437
	if (runtime->oss.plugin_first) {
1438
		struct snd_pcm_plugin_channel *channels;
1439
		size_t oss_frame_bytes = (runtime->oss.plugin_last->dst_width * runtime->oss.plugin_last->dst_format.channels) / 8;
1440
		if (!in_kernel)
1441
			buf = runtime->oss.buffer;
1442
		frames = bytes / oss_frame_bytes;
1443
		frames1 = snd_pcm_plug_client_channels_buf(substream, buf, frames, &channels);
1444
		if (frames1 < 0)
1445
			return frames1;
1446
		frames1 = snd_pcm_plug_read_transfer(substream, channels, frames1);
1447
		if (frames1 <= 0)
1448
			return frames1;
1449
		bytes = frames1 * oss_frame_bytes;
1450
		if (!in_kernel && copy_to_user(final_dst, buf, bytes))
1451
			return -EFAULT;
1452
	} else
1453
#endif
1454
	{
1455
		frames = bytes_to_frames(runtime, bytes);
1456
		frames1 = snd_pcm_oss_read3(substream, buf, frames, in_kernel);
1457
		if (frames1 <= 0)
1458
			return frames1;
1459
		bytes = frames_to_bytes(runtime, frames1);
1460
	}
1461
	return bytes;
1462
}
1463

1464
static ssize_t snd_pcm_oss_read1(struct snd_pcm_substream *substream, char __user *buf, size_t bytes)
1465
{
1466
	size_t xfer = 0;
1467
	ssize_t tmp;
1468
	struct snd_pcm_runtime *runtime = substream->runtime;
1469

1470
	if (atomic_read(&substream->mmap_count))
1471
		return -ENXIO;
1472

1473
	if ((tmp = snd_pcm_oss_make_ready(substream)) < 0)
1474
		return tmp;
1475
	mutex_lock(&runtime->oss.params_lock);
1476
	while (bytes > 0) {
1477
		if (bytes < runtime->oss.period_bytes || runtime->oss.buffer_used > 0) {
1478
			if (runtime->oss.buffer_used == 0) {
1479
				tmp = snd_pcm_oss_read2(substream, runtime->oss.buffer, runtime->oss.period_bytes, 1);
1480
				if (tmp <= 0)
1481
					goto err;
1482
				runtime->oss.bytes += tmp;
1483
				runtime->oss.period_ptr = tmp;
1484
				runtime->oss.buffer_used = tmp;
1485
			}
1486
			tmp = bytes;
1487
			if ((size_t) tmp > runtime->oss.buffer_used)
1488
				tmp = runtime->oss.buffer_used;
1489
			if (copy_to_user(buf, runtime->oss.buffer + (runtime->oss.period_ptr - runtime->oss.buffer_used), tmp)) {
1490
				tmp = -EFAULT;
1491
				goto err;
1492
			}
1493
			buf += tmp;
1494
			bytes -= tmp;
1495
			xfer += tmp;
1496
			runtime->oss.buffer_used -= tmp;
1497
		} else {
1498
			tmp = snd_pcm_oss_read2(substream, (char __force *)buf,
1499
						runtime->oss.period_bytes, 0);
1500
			if (tmp <= 0)
1501
				goto err;
1502
			runtime->oss.bytes += tmp;
1503
			buf += tmp;
1504
			bytes -= tmp;
1505
			xfer += tmp;
1506
		}
1507
	}
1508
	mutex_unlock(&runtime->oss.params_lock);
1509
	return xfer;
1510

1511
 err:
1512
	mutex_unlock(&runtime->oss.params_lock);
1513
	return xfer > 0 ? (snd_pcm_sframes_t)xfer : tmp;
1514
}
1515

1516
static int snd_pcm_oss_reset(struct snd_pcm_oss_file *pcm_oss_file)
1517
{
1518
	struct snd_pcm_substream *substream;
1519
	struct snd_pcm_runtime *runtime;
1520
	int i;
1521

1522
	for (i = 0; i < 2; i++) { 
1523
		substream = pcm_oss_file->streams[i];
1524
		if (!substream)
1525
			continue;
1526
		runtime = substream->runtime;
1527
		snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DROP, NULL);
1528
		runtime->oss.prepare = 1;
1529
		runtime->oss.buffer_used = 0;
1530
		runtime->oss.prev_hw_ptr_period = 0;
1531
		runtime->oss.period_ptr = 0;
1532
	}
1533
	return 0;
1534
}
1535

1536
static int snd_pcm_oss_post(struct snd_pcm_oss_file *pcm_oss_file)
1537
{
1538
	struct snd_pcm_substream *substream;
1539
	int err;
1540

1541
	substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
1542
	if (substream != NULL) {
1543
		if ((err = snd_pcm_oss_make_ready(substream)) < 0)
1544
			return err;
1545
		snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_START, NULL);
1546
	}
1547
	/* note: all errors from the start action are ignored */
1548
	/* OSS apps do not know, how to handle them */
1549
	return 0;
1550
}
1551

1552
static int snd_pcm_oss_sync1(struct snd_pcm_substream *substream, size_t size)
1553
{
1554
	struct snd_pcm_runtime *runtime;
1555
	ssize_t result = 0;
1556
	snd_pcm_state_t state;
1557
	long res;
1558
	wait_queue_t wait;
1559

1560
	runtime = substream->runtime;
1561
	init_waitqueue_entry(&wait, current);
1562
	add_wait_queue(&runtime->sleep, &wait);
1563
#ifdef OSS_DEBUG
1564
	printk(KERN_DEBUG "sync1: size = %li\n", size);
1565
#endif
1566
	while (1) {
1567
		result = snd_pcm_oss_write2(substream, runtime->oss.buffer, size, 1);
1568
		if (result > 0) {
1569
			runtime->oss.buffer_used = 0;
1570
			result = 0;
1571
			break;
1572
		}
1573
		if (result != 0 && result != -EAGAIN)
1574
			break;
1575
		result = 0;
1576
		set_current_state(TASK_INTERRUPTIBLE);
1577
		snd_pcm_stream_lock_irq(substream);
1578
		state = runtime->status->state;
1579
		snd_pcm_stream_unlock_irq(substream);
1580
		if (state != SNDRV_PCM_STATE_RUNNING) {
1581
			set_current_state(TASK_RUNNING);
1582
			break;
1583
		}
1584
		res = schedule_timeout(10 * HZ);
1585
		if (signal_pending(current)) {
1586
			result = -ERESTARTSYS;
1587
			break;
1588
		}
1589
		if (res == 0) {
1590
			snd_printk(KERN_ERR "OSS sync error - DMA timeout\n");
1591
			result = -EIO;
1592
			break;
1593
		}
1594
	}
1595
	remove_wait_queue(&runtime->sleep, &wait);
1596
	return result;
1597
}
1598

1599
static int snd_pcm_oss_sync(struct snd_pcm_oss_file *pcm_oss_file)
1600
{
1601
	int err = 0;
1602
	unsigned int saved_f_flags;
1603
	struct snd_pcm_substream *substream;
1604
	struct snd_pcm_runtime *runtime;
1605
	snd_pcm_format_t format;
1606
	unsigned long width;
1607
	size_t size;
1608

1609
	substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
1610
	if (substream != NULL) {
1611
		runtime = substream->runtime;
1612
		if (atomic_read(&substream->mmap_count))
1613
			goto __direct;
1614
		if ((err = snd_pcm_oss_make_ready(substream)) < 0)
1615
			return err;
1616
		format = snd_pcm_oss_format_from(runtime->oss.format);
1617
		width = snd_pcm_format_physical_width(format);
1618
		mutex_lock(&runtime->oss.params_lock);
1619
		if (runtime->oss.buffer_used > 0) {
1620
#ifdef OSS_DEBUG
1621
			printk(KERN_DEBUG "sync: buffer_used\n");
1622
#endif
1623
			size = (8 * (runtime->oss.period_bytes - runtime->oss.buffer_used) + 7) / width;
1624
			snd_pcm_format_set_silence(format,
1625
						   runtime->oss.buffer + runtime->oss.buffer_used,
1626
						   size);
1627
			err = snd_pcm_oss_sync1(substream, runtime->oss.period_bytes);
1628
			if (err < 0) {
1629
				mutex_unlock(&runtime->oss.params_lock);
1630
				return err;
1631
			}
1632
		} else if (runtime->oss.period_ptr > 0) {
1633
#ifdef OSS_DEBUG
1634
			printk(KERN_DEBUG "sync: period_ptr\n");
1635
#endif
1636
			size = runtime->oss.period_bytes - runtime->oss.period_ptr;
1637
			snd_pcm_format_set_silence(format,
1638
						   runtime->oss.buffer,
1639
						   size * 8 / width);
1640
			err = snd_pcm_oss_sync1(substream, size);
1641
			if (err < 0) {
1642
				mutex_unlock(&runtime->oss.params_lock);
1643
				return err;
1644
			}
1645
		}
1646
		/*
1647
		 * The ALSA's period might be a bit large than OSS one.
1648
		 * Fill the remain portion of ALSA period with zeros.
1649
		 */
1650
		size = runtime->control->appl_ptr % runtime->period_size;
1651
		if (size > 0) {
1652
			size = runtime->period_size - size;
1653
			if (runtime->access == SNDRV_PCM_ACCESS_RW_INTERLEAVED) {
1654
				size = (runtime->frame_bits * size) / 8;
1655
				while (size > 0) {
1656
					mm_segment_t fs;
1657
					size_t size1 = size < runtime->oss.period_bytes ? size : runtime->oss.period_bytes;
1658
					size -= size1;
1659
					size1 *= 8;
1660
					size1 /= runtime->sample_bits;
1661
					snd_pcm_format_set_silence(runtime->format,
1662
								   runtime->oss.buffer,
1663
								   size1);
1664
					size1 /= runtime->channels; /* frames */
1665
					fs = snd_enter_user();
1666
					snd_pcm_lib_write(substream, (void __force __user *)runtime->oss.buffer, size1);
1667
					snd_leave_user(fs);
1668
				}
1669
			} else if (runtime->access == SNDRV_PCM_ACCESS_RW_NONINTERLEAVED) {
1670
				void __user *buffers[runtime->channels];
1671
				memset(buffers, 0, runtime->channels * sizeof(void *));
1672
				snd_pcm_lib_writev(substream, buffers, size);
1673
			}
1674
		}
1675
		mutex_unlock(&runtime->oss.params_lock);
1676
		/*
1677
		 * finish sync: drain the buffer
1678
		 */
1679
	      __direct:
1680
		saved_f_flags = substream->f_flags;
1681
		substream->f_flags &= ~O_NONBLOCK;
1682
		err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DRAIN, NULL);
1683
		substream->f_flags = saved_f_flags;
1684
		if (err < 0)
1685
			return err;
1686
		runtime->oss.prepare = 1;
1687
	}
1688

1689
	substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
1690
	if (substream != NULL) {
1691
		if ((err = snd_pcm_oss_make_ready(substream)) < 0)
1692
			return err;
1693
		runtime = substream->runtime;
1694
		err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DROP, NULL);
1695
		if (err < 0)
1696
			return err;
1697
		runtime->oss.buffer_used = 0;
1698
		runtime->oss.prepare = 1;
1699
	}
1700
	return 0;
1701
}
1702

1703
static int snd_pcm_oss_set_rate(struct snd_pcm_oss_file *pcm_oss_file, int rate)
1704
{
1705
	int idx;
1706

1707
	for (idx = 1; idx >= 0; --idx) {
1708
		struct snd_pcm_substream *substream = pcm_oss_file->streams[idx];
1709
		struct snd_pcm_runtime *runtime;
1710
		if (substream == NULL)
1711
			continue;
1712
		runtime = substream->runtime;
1713
		if (rate < 1000)
1714
			rate = 1000;
1715
		else if (rate > 192000)
1716
			rate = 192000;
1717
		if (runtime->oss.rate != rate) {
1718
			runtime->oss.params = 1;
1719
			runtime->oss.rate = rate;
1720
		}
1721
	}
1722
	return snd_pcm_oss_get_rate(pcm_oss_file);
1723
}
1724

1725
static int snd_pcm_oss_get_rate(struct snd_pcm_oss_file *pcm_oss_file)
1726
{
1727
	struct snd_pcm_substream *substream;
1728
	int err;
1729
	
1730
	if ((err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream)) < 0)
1731
		return err;
1732
	return substream->runtime->oss.rate;
1733
}
1734

1735
static int snd_pcm_oss_set_channels(struct snd_pcm_oss_file *pcm_oss_file, unsigned int channels)
1736
{
1737
	int idx;
1738
	if (channels < 1)
1739
		channels = 1;
1740
	if (channels > 128)
1741
		return -EINVAL;
1742
	for (idx = 1; idx >= 0; --idx) {
1743
		struct snd_pcm_substream *substream = pcm_oss_file->streams[idx];
1744
		struct snd_pcm_runtime *runtime;
1745
		if (substream == NULL)
1746
			continue;
1747
		runtime = substream->runtime;
1748
		if (runtime->oss.channels != channels) {
1749
			runtime->oss.params = 1;
1750
			runtime->oss.channels = channels;
1751
		}
1752
	}
1753
	return snd_pcm_oss_get_channels(pcm_oss_file);
1754
}
1755

1756
static int snd_pcm_oss_get_channels(struct snd_pcm_oss_file *pcm_oss_file)
1757
{
1758
	struct snd_pcm_substream *substream;
1759
	int err;
1760
	
1761
	if ((err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream)) < 0)
1762
		return err;
1763
	return substream->runtime->oss.channels;
1764
}
1765

1766
static int snd_pcm_oss_get_block_size(struct snd_pcm_oss_file *pcm_oss_file)
1767
{
1768
	struct snd_pcm_substream *substream;
1769
	int err;
1770
	
1771
	if ((err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream)) < 0)
1772
		return err;
1773
	return substream->runtime->oss.period_bytes;
1774
}
1775

1776
static int snd_pcm_oss_get_formats(struct snd_pcm_oss_file *pcm_oss_file)
1777
{
1778
	struct snd_pcm_substream *substream;
1779
	int err;
1780
	int direct;
1781
	struct snd_pcm_hw_params *params;
1782
	unsigned int formats = 0;
1783
	struct snd_mask format_mask;
1784
	int fmt;
1785

1786
	if ((err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream)) < 0)
1787
		return err;
1788
	if (atomic_read(&substream->mmap_count))
1789
		direct = 1;
1790
	else
1791
		direct = substream->oss.setup.direct;
1792
	if (!direct)
1793
		return AFMT_MU_LAW | AFMT_U8 |
1794
		       AFMT_S16_LE | AFMT_S16_BE |
1795
		       AFMT_S8 | AFMT_U16_LE |
1796
		       AFMT_U16_BE |
1797
			AFMT_S32_LE | AFMT_S32_BE |
1798
			AFMT_S24_LE | AFMT_S24_BE |
1799
			AFMT_S24_PACKED;
1800
	params = kmalloc(sizeof(*params), GFP_KERNEL);
1801
	if (!params)
1802
		return -ENOMEM;
1803
	_snd_pcm_hw_params_any(params);
1804
	err = snd_pcm_hw_refine(substream, params);
1805
	format_mask = *hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT); 
1806
	kfree(params);
1807
	if (err < 0)
1808
		return err;
1809
	for (fmt = 0; fmt < 32; ++fmt) {
1810
		if (snd_mask_test(&format_mask, fmt)) {
1811
			int f = snd_pcm_oss_format_to(fmt);
1812
			if (f >= 0)
1813
				formats |= f;
1814
		}
1815
	}
1816
	return formats;
1817
}
1818

1819
static int snd_pcm_oss_set_format(struct snd_pcm_oss_file *pcm_oss_file, int format)
1820
{
1821
	int formats, idx;
1822
	
1823
	if (format != AFMT_QUERY) {
1824
		formats = snd_pcm_oss_get_formats(pcm_oss_file);
1825
		if (formats < 0)
1826
			return formats;
1827
		if (!(formats & format))
1828
			format = AFMT_U8;
1829
		for (idx = 1; idx >= 0; --idx) {
1830
			struct snd_pcm_substream *substream = pcm_oss_file->streams[idx];
1831
			struct snd_pcm_runtime *runtime;
1832
			if (substream == NULL)
1833
				continue;
1834
			runtime = substream->runtime;
1835
			if (runtime->oss.format != format) {
1836
				runtime->oss.params = 1;
1837
				runtime->oss.format = format;
1838
			}
1839
		}
1840
	}
1841
	return snd_pcm_oss_get_format(pcm_oss_file);
1842
}
1843

1844
static int snd_pcm_oss_get_format(struct snd_pcm_oss_file *pcm_oss_file)
1845
{
1846
	struct snd_pcm_substream *substream;
1847
	int err;
1848
	
1849
	if ((err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream)) < 0)
1850
		return err;
1851
	return substream->runtime->oss.format;
1852
}
1853

1854
static int snd_pcm_oss_set_subdivide1(struct snd_pcm_substream *substream, int subdivide)
1855
{
1856
	struct snd_pcm_runtime *runtime;
1857

1858
	if (substream == NULL)
1859
		return 0;
1860
	runtime = substream->runtime;
1861
	if (subdivide == 0) {
1862
		subdivide = runtime->oss.subdivision;
1863
		if (subdivide == 0)
1864
			subdivide = 1;
1865
		return subdivide;
1866
	}
1867
	if (runtime->oss.subdivision || runtime->oss.fragshift)
1868
		return -EINVAL;
1869
	if (subdivide != 1 && subdivide != 2 && subdivide != 4 &&
1870
	    subdivide != 8 && subdivide != 16)
1871
		return -EINVAL;
1872
	runtime->oss.subdivision = subdivide;
1873
	runtime->oss.params = 1;
1874
	return subdivide;
1875
}
1876

1877
static int snd_pcm_oss_set_subdivide(struct snd_pcm_oss_file *pcm_oss_file, int subdivide)
1878
{
1879
	int err = -EINVAL, idx;
1880

1881
	for (idx = 1; idx >= 0; --idx) {
1882
		struct snd_pcm_substream *substream = pcm_oss_file->streams[idx];
1883
		if (substream == NULL)
1884
			continue;
1885
		if ((err = snd_pcm_oss_set_subdivide1(substream, subdivide)) < 0)
1886
			return err;
1887
	}
1888
	return err;
1889
}
1890

1891
static int snd_pcm_oss_set_fragment1(struct snd_pcm_substream *substream, unsigned int val)
1892
{
1893
	struct snd_pcm_runtime *runtime;
1894

1895
	if (substream == NULL)
1896
		return 0;
1897
	runtime = substream->runtime;
1898
	if (runtime->oss.subdivision || runtime->oss.fragshift)
1899
		return -EINVAL;
1900
	runtime->oss.fragshift = val & 0xffff;
1901
	runtime->oss.maxfrags = (val >> 16) & 0xffff;
1902
	if (runtime->oss.fragshift < 4)		/* < 16 */
1903
		runtime->oss.fragshift = 4;
1904
	if (runtime->oss.maxfrags < 2)
1905
		runtime->oss.maxfrags = 2;
1906
	runtime->oss.params = 1;
1907
	return 0;
1908
}
1909

1910
static int snd_pcm_oss_set_fragment(struct snd_pcm_oss_file *pcm_oss_file, unsigned int val)
1911
{
1912
	int err = -EINVAL, idx;
1913

1914
	for (idx = 1; idx >= 0; --idx) {
1915
		struct snd_pcm_substream *substream = pcm_oss_file->streams[idx];
1916
		if (substream == NULL)
1917
			continue;
1918
		if ((err = snd_pcm_oss_set_fragment1(substream, val)) < 0)
1919
			return err;
1920
	}
1921
	return err;
1922
}
1923

1924
static int snd_pcm_oss_nonblock(struct file * file)
1925
{
1926
	spin_lock(&file->f_lock);
1927
	file->f_flags |= O_NONBLOCK;
1928
	spin_unlock(&file->f_lock);
1929
	return 0;
1930
}
1931

1932
static int snd_pcm_oss_get_caps1(struct snd_pcm_substream *substream, int res)
1933
{
1934

1935
	if (substream == NULL) {
1936
		res &= ~DSP_CAP_DUPLEX;
1937
		return res;
1938
	}
1939
#ifdef DSP_CAP_MULTI
1940
	if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
1941
		if (substream->pstr->substream_count > 1)
1942
			res |= DSP_CAP_MULTI;
1943
#endif
1944
	/* DSP_CAP_REALTIME is set all times: */
1945
	/* all ALSA drivers can return actual pointer in ring buffer */
1946
#if defined(DSP_CAP_REALTIME) && 0
1947
	{
1948
		struct snd_pcm_runtime *runtime = substream->runtime;
1949
		if (runtime->info & (SNDRV_PCM_INFO_BLOCK_TRANSFER|SNDRV_PCM_INFO_BATCH))
1950
			res &= ~DSP_CAP_REALTIME;
1951
	}
1952
#endif
1953
	return res;
1954
}
1955

1956
static int snd_pcm_oss_get_caps(struct snd_pcm_oss_file *pcm_oss_file)
1957
{
1958
	int result, idx;
1959
	
1960
	result = DSP_CAP_TRIGGER | DSP_CAP_MMAP	| DSP_CAP_DUPLEX | DSP_CAP_REALTIME;
1961
	for (idx = 0; idx < 2; idx++) {
1962
		struct snd_pcm_substream *substream = pcm_oss_file->streams[idx];
1963
		result = snd_pcm_oss_get_caps1(substream, result);
1964
	}
1965
	result |= 0x0001;	/* revision - same as SB AWE 64 */
1966
	return result;
1967
}
1968

1969
static void snd_pcm_oss_simulate_fill(struct snd_pcm_substream *substream,
1970
				      snd_pcm_uframes_t hw_ptr)
1971
{
1972
	struct snd_pcm_runtime *runtime = substream->runtime;
1973
	snd_pcm_uframes_t appl_ptr;
1974
	appl_ptr = hw_ptr + runtime->buffer_size;
1975
	appl_ptr %= runtime->boundary;
1976
	runtime->control->appl_ptr = appl_ptr;
1977
}
1978

1979
static int snd_pcm_oss_set_trigger(struct snd_pcm_oss_file *pcm_oss_file, int trigger)
1980
{
1981
	struct snd_pcm_runtime *runtime;
1982
	struct snd_pcm_substream *psubstream = NULL, *csubstream = NULL;
1983
	int err, cmd;
1984

1985
#ifdef OSS_DEBUG
1986
	printk(KERN_DEBUG "pcm_oss: trigger = 0x%x\n", trigger);
1987
#endif
1988
	
1989
	psubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
1990
	csubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
1991

1992
	if (psubstream) {
1993
		if ((err = snd_pcm_oss_make_ready(psubstream)) < 0)
1994
			return err;
1995
	}
1996
	if (csubstream) {
1997
		if ((err = snd_pcm_oss_make_ready(csubstream)) < 0)
1998
			return err;
1999
	}
2000
      	if (psubstream) {
2001
      		runtime = psubstream->runtime;
2002
		if (trigger & PCM_ENABLE_OUTPUT) {
2003
			if (runtime->oss.trigger)
2004
				goto _skip1;
2005
			if (atomic_read(&psubstream->mmap_count))
2006
				snd_pcm_oss_simulate_fill(psubstream,
2007
						get_hw_ptr_period(runtime));
2008
			runtime->oss.trigger = 1;
2009
			runtime->start_threshold = 1;
2010
			cmd = SNDRV_PCM_IOCTL_START;
2011
		} else {
2012
			if (!runtime->oss.trigger)
2013
				goto _skip1;
2014
			runtime->oss.trigger = 0;
2015
			runtime->start_threshold = runtime->boundary;
2016
			cmd = SNDRV_PCM_IOCTL_DROP;
2017
			runtime->oss.prepare = 1;
2018
		}
2019
		err = snd_pcm_kernel_ioctl(psubstream, cmd, NULL);
2020
		if (err < 0)
2021
			return err;
2022
	}
2023
 _skip1:
2024
	if (csubstream) {
2025
      		runtime = csubstream->runtime;
2026
		if (trigger & PCM_ENABLE_INPUT) {
2027
			if (runtime->oss.trigger)
2028
				goto _skip2;
2029
			runtime->oss.trigger = 1;
2030
			runtime->start_threshold = 1;
2031
			cmd = SNDRV_PCM_IOCTL_START;
2032
		} else {
2033
			if (!runtime->oss.trigger)
2034
				goto _skip2;
2035
			runtime->oss.trigger = 0;
2036
			runtime->start_threshold = runtime->boundary;
2037
			cmd = SNDRV_PCM_IOCTL_DROP;
2038
			runtime->oss.prepare = 1;
2039
		}
2040
		err = snd_pcm_kernel_ioctl(csubstream, cmd, NULL);
2041
		if (err < 0)
2042
			return err;
2043
	}
2044
 _skip2:
2045
	return 0;
2046
}
2047

2048
static int snd_pcm_oss_get_trigger(struct snd_pcm_oss_file *pcm_oss_file)
2049
{
2050
	struct snd_pcm_substream *psubstream = NULL, *csubstream = NULL;
2051
	int result = 0;
2052

2053
	psubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
2054
	csubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
2055
	if (psubstream && psubstream->runtime && psubstream->runtime->oss.trigger)
2056
		result |= PCM_ENABLE_OUTPUT;
2057
	if (csubstream && csubstream->runtime && csubstream->runtime->oss.trigger)
2058
		result |= PCM_ENABLE_INPUT;
2059
	return result;
2060
}
2061

2062
static int snd_pcm_oss_get_odelay(struct snd_pcm_oss_file *pcm_oss_file)
2063
{
2064
	struct snd_pcm_substream *substream;
2065
	struct snd_pcm_runtime *runtime;
2066
	snd_pcm_sframes_t delay;
2067
	int err;
2068

2069
	substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
2070
	if (substream == NULL)
2071
		return -EINVAL;
2072
	if ((err = snd_pcm_oss_make_ready(substream)) < 0)
2073
		return err;
2074
	runtime = substream->runtime;
2075
	if (runtime->oss.params || runtime->oss.prepare)
2076
		return 0;
2077
	err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DELAY, &delay);
2078
	if (err == -EPIPE)
2079
		delay = 0;	/* hack for broken OSS applications */
2080
	else if (err < 0)
2081
		return err;
2082
	return snd_pcm_oss_bytes(substream, delay);
2083
}
2084

2085
static int snd_pcm_oss_get_ptr(struct snd_pcm_oss_file *pcm_oss_file, int stream, struct count_info __user * _info)
2086
{	
2087
	struct snd_pcm_substream *substream;
2088
	struct snd_pcm_runtime *runtime;
2089
	snd_pcm_sframes_t delay;
2090
	int fixup;
2091
	struct count_info info;
2092
	int err;
2093

2094
	if (_info == NULL)
2095
		return -EFAULT;
2096
	substream = pcm_oss_file->streams[stream];
2097
	if (substream == NULL)
2098
		return -EINVAL;
2099
	if ((err = snd_pcm_oss_make_ready(substream)) < 0)
2100
		return err;
2101
	runtime = substream->runtime;
2102
	if (runtime->oss.params || runtime->oss.prepare) {
2103
		memset(&info, 0, sizeof(info));
2104
		if (copy_to_user(_info, &info, sizeof(info)))
2105
			return -EFAULT;
2106
		return 0;
2107
	}
2108
	if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
2109
		err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DELAY, &delay);
2110
		if (err == -EPIPE || err == -ESTRPIPE || (! err && delay < 0)) {
2111
			err = 0;
2112
			delay = 0;
2113
			fixup = 0;
2114
		} else {
2115
			fixup = runtime->oss.buffer_used;
2116
		}
2117
	} else {
2118
		err = snd_pcm_oss_capture_position_fixup(substream, &delay);
2119
		fixup = -runtime->oss.buffer_used;
2120
	}
2121
	if (err < 0)
2122
		return err;
2123
	info.ptr = snd_pcm_oss_bytes(substream, runtime->status->hw_ptr % runtime->buffer_size);
2124
	if (atomic_read(&substream->mmap_count)) {
2125
		snd_pcm_sframes_t n;
2126
		delay = get_hw_ptr_period(runtime);
2127
		n = delay - runtime->oss.prev_hw_ptr_period;
2128
		if (n < 0)
2129
			n += runtime->boundary;
2130
		info.blocks = n / runtime->period_size;
2131
		runtime->oss.prev_hw_ptr_period = delay;
2132
		if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
2133
			snd_pcm_oss_simulate_fill(substream, delay);
2134
		info.bytes = snd_pcm_oss_bytes(substream, runtime->status->hw_ptr) & INT_MAX;
2135
	} else {
2136
		delay = snd_pcm_oss_bytes(substream, delay);
2137
		if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
2138
			if (substream->oss.setup.buggyptr)
2139
				info.blocks = (runtime->oss.buffer_bytes - delay - fixup) / runtime->oss.period_bytes;
2140
			else
2141
				info.blocks = (delay + fixup) / runtime->oss.period_bytes;
2142
			info.bytes = (runtime->oss.bytes - delay) & INT_MAX;
2143
		} else {
2144
			delay += fixup;
2145
			info.blocks = delay / runtime->oss.period_bytes;
2146
			info.bytes = (runtime->oss.bytes + delay) & INT_MAX;
2147
		}
2148
	}
2149
	if (copy_to_user(_info, &info, sizeof(info)))
2150
		return -EFAULT;
2151
	return 0;
2152
}
2153

2154
static int snd_pcm_oss_get_space(struct snd_pcm_oss_file *pcm_oss_file, int stream, struct audio_buf_info __user *_info)
2155
{
2156
	struct snd_pcm_substream *substream;
2157
	struct snd_pcm_runtime *runtime;
2158
	snd_pcm_sframes_t avail;
2159
	int fixup;
2160
	struct audio_buf_info info;
2161
	int err;
2162

2163
	if (_info == NULL)
2164
		return -EFAULT;
2165
	substream = pcm_oss_file->streams[stream];
2166
	if (substream == NULL)
2167
		return -EINVAL;
2168
	runtime = substream->runtime;
2169

2170
	if (runtime->oss.params &&
2171
	    (err = snd_pcm_oss_change_params(substream)) < 0)
2172
		return err;
2173

2174
	info.fragsize = runtime->oss.period_bytes;
2175
	info.fragstotal = runtime->periods;
2176
	if (runtime->oss.prepare) {
2177
		if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
2178
			info.bytes = runtime->oss.period_bytes * runtime->oss.periods;
2179
			info.fragments = runtime->oss.periods;
2180
		} else {
2181
			info.bytes = 0;
2182
			info.fragments = 0;
2183
		}
2184
	} else {
2185
		if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
2186
			err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DELAY, &avail);
2187
			if (err == -EPIPE || err == -ESTRPIPE || (! err && avail < 0)) {
2188
				avail = runtime->buffer_size;
2189
				err = 0;
2190
				fixup = 0;
2191
			} else {
2192
				avail = runtime->buffer_size - avail;
2193
				fixup = -runtime->oss.buffer_used;
2194
			}
2195
		} else {
2196
			err = snd_pcm_oss_capture_position_fixup(substream, &avail);
2197
			fixup = runtime->oss.buffer_used;
2198
		}
2199
		if (err < 0)
2200
			return err;
2201
		info.bytes = snd_pcm_oss_bytes(substream, avail) + fixup;
2202
		info.fragments = info.bytes / runtime->oss.period_bytes;
2203
	}
2204

2205
#ifdef OSS_DEBUG
2206
	printk(KERN_DEBUG "pcm_oss: space: bytes = %i, fragments = %i, "
2207
	       "fragstotal = %i, fragsize = %i\n",
2208
	       info.bytes, info.fragments, info.fragstotal, info.fragsize);
2209
#endif
2210
	if (copy_to_user(_info, &info, sizeof(info)))
2211
		return -EFAULT;
2212
	return 0;
2213
}
2214

2215
static int snd_pcm_oss_get_mapbuf(struct snd_pcm_oss_file *pcm_oss_file, int stream, struct buffmem_desc __user * _info)
2216
{
2217
	// it won't be probably implemented
2218
	// snd_printd("TODO: snd_pcm_oss_get_mapbuf\n");
2219
	return -EINVAL;
2220
}
2221

2222
static const char *strip_task_path(const char *path)
2223
{
2224
	const char *ptr, *ptrl = NULL;
2225
	for (ptr = path; *ptr; ptr++) {
2226
		if (*ptr == '/')
2227
			ptrl = ptr + 1;
2228
	}
2229
	return ptrl;
2230
}
2231

2232
static void snd_pcm_oss_look_for_setup(struct snd_pcm *pcm, int stream,
2233
				      const char *task_name,
2234
				      struct snd_pcm_oss_setup *rsetup)
2235
{
2236
	struct snd_pcm_oss_setup *setup;
2237

2238
	mutex_lock(&pcm->streams[stream].oss.setup_mutex);
2239
	do {
2240
		for (setup = pcm->streams[stream].oss.setup_list; setup;
2241
		     setup = setup->next) {
2242
			if (!strcmp(setup->task_name, task_name))
2243
				goto out;
2244
		}
2245
	} while ((task_name = strip_task_path(task_name)) != NULL);
2246
 out:
2247
	if (setup)
2248
		*rsetup = *setup;
2249
	mutex_unlock(&pcm->streams[stream].oss.setup_mutex);
2250
}
2251

2252
static void snd_pcm_oss_release_substream(struct snd_pcm_substream *substream)
2253
{
2254
	struct snd_pcm_runtime *runtime;
2255
	runtime = substream->runtime;
2256
	vfree(runtime->oss.buffer);
2257
	runtime->oss.buffer = NULL;
2258
#ifdef CONFIG_SND_PCM_OSS_PLUGINS
2259
	snd_pcm_oss_plugin_clear(substream);
2260
#endif
2261
	substream->oss.oss = 0;
2262
}
2263

2264
static void snd_pcm_oss_init_substream(struct snd_pcm_substream *substream,
2265
				       struct snd_pcm_oss_setup *setup,
2266
				       int minor)
2267
{
2268
	struct snd_pcm_runtime *runtime;
2269

2270
	substream->oss.oss = 1;
2271
	substream->oss.setup = *setup;
2272
	if (setup->nonblock)
2273
		substream->f_flags |= O_NONBLOCK;
2274
	else if (setup->block)
2275
		substream->f_flags &= ~O_NONBLOCK;
2276
	runtime = substream->runtime;
2277
	runtime->oss.params = 1;
2278
	runtime->oss.trigger = 1;
2279
	runtime->oss.rate = 8000;
2280
	mutex_init(&runtime->oss.params_lock);
2281
	switch (SNDRV_MINOR_OSS_DEVICE(minor)) {
2282
	case SNDRV_MINOR_OSS_PCM_8:
2283
		runtime->oss.format = AFMT_U8;
2284
		break;
2285
	case SNDRV_MINOR_OSS_PCM_16:
2286
		runtime->oss.format = AFMT_S16_LE;
2287
		break;
2288
	default:
2289
		runtime->oss.format = AFMT_MU_LAW;
2290
	}
2291
	runtime->oss.channels = 1;
2292
	runtime->oss.fragshift = 0;
2293
	runtime->oss.maxfrags = 0;
2294
	runtime->oss.subdivision = 0;
2295
	substream->pcm_release = snd_pcm_oss_release_substream;
2296
}
2297

2298
static int snd_pcm_oss_release_file(struct snd_pcm_oss_file *pcm_oss_file)
2299
{
2300
	int cidx;
2301
	if (!pcm_oss_file)
2302
		return 0;
2303
	for (cidx = 0; cidx < 2; ++cidx) {
2304
		struct snd_pcm_substream *substream = pcm_oss_file->streams[cidx];
2305
		if (substream)
2306
			snd_pcm_release_substream(substream);
2307
	}
2308
	kfree(pcm_oss_file);
2309
	return 0;
2310
}
2311

2312
static int snd_pcm_oss_open_file(struct file *file,
2313
				 struct snd_pcm *pcm,
2314
				 struct snd_pcm_oss_file **rpcm_oss_file,
2315
				 int minor,
2316
				 struct snd_pcm_oss_setup *setup)
2317
{
2318
	int idx, err;
2319
	struct snd_pcm_oss_file *pcm_oss_file;
2320
	struct snd_pcm_substream *substream;
2321
	fmode_t f_mode = file->f_mode;
2322

2323
	if (rpcm_oss_file)
2324
		*rpcm_oss_file = NULL;
2325

2326
	pcm_oss_file = kzalloc(sizeof(*pcm_oss_file), GFP_KERNEL);
2327
	if (pcm_oss_file == NULL)
2328
		return -ENOMEM;
2329

2330
	if ((f_mode & (FMODE_WRITE|FMODE_READ)) == (FMODE_WRITE|FMODE_READ) &&
2331
	    (pcm->info_flags & SNDRV_PCM_INFO_HALF_DUPLEX))
2332
		f_mode = FMODE_WRITE;
2333

2334
	file->f_flags &= ~O_APPEND;
2335
	for (idx = 0; idx < 2; idx++) {
2336
		if (setup[idx].disable)
2337
			continue;
2338
		if (! pcm->streams[idx].substream_count)
2339
			continue; /* no matching substream */
2340
		if (idx == SNDRV_PCM_STREAM_PLAYBACK) {
2341
			if (! (f_mode & FMODE_WRITE))
2342
				continue;
2343
		} else {
2344
			if (! (f_mode & FMODE_READ))
2345
				continue;
2346
		}
2347
		err = snd_pcm_open_substream(pcm, idx, file, &substream);
2348
		if (err < 0) {
2349
			snd_pcm_oss_release_file(pcm_oss_file);
2350
			return err;
2351
		}
2352

2353
		pcm_oss_file->streams[idx] = substream;
2354
		substream->file = pcm_oss_file;
2355
		snd_pcm_oss_init_substream(substream, &setup[idx], minor);
2356
	}
2357
	
2358
	if (!pcm_oss_file->streams[0] && !pcm_oss_file->streams[1]) {
2359
		snd_pcm_oss_release_file(pcm_oss_file);
2360
		return -EINVAL;
2361
	}
2362

2363
	file->private_data = pcm_oss_file;
2364
	if (rpcm_oss_file)
2365
		*rpcm_oss_file = pcm_oss_file;
2366
	return 0;
2367
}
2368

2369

2370
static int snd_task_name(struct task_struct *task, char *name, size_t size)
2371
{
2372
	unsigned int idx;
2373

2374
	if (snd_BUG_ON(!task || !name || size < 2))
2375
		return -EINVAL;
2376
	for (idx = 0; idx < sizeof(task->comm) && idx + 1 < size; idx++)
2377
		name[idx] = task->comm[idx];
2378
	name[idx] = '\0';
2379
	return 0;
2380
}
2381

2382
static int snd_pcm_oss_open(struct inode *inode, struct file *file)
2383
{
2384
	int err;
2385
	char task_name[32];
2386
	struct snd_pcm *pcm;
2387
	struct snd_pcm_oss_file *pcm_oss_file;
2388
	struct snd_pcm_oss_setup setup[2];
2389
	int nonblock;
2390
	wait_queue_t wait;
2391

2392
	err = nonseekable_open(inode, file);
2393
	if (err < 0)
2394
		return err;
2395

2396
	pcm = snd_lookup_oss_minor_data(iminor(inode),
2397
					SNDRV_OSS_DEVICE_TYPE_PCM);
2398
	if (pcm == NULL) {
2399
		err = -ENODEV;
2400
		goto __error1;
2401
	}
2402
	err = snd_card_file_add(pcm->card, file);
2403
	if (err < 0)
2404
		goto __error1;
2405
	if (!try_module_get(pcm->card->module)) {
2406
		err = -EFAULT;
2407
		goto __error2;
2408
	}
2409
	if (snd_task_name(current, task_name, sizeof(task_name)) < 0) {
2410
		err = -EFAULT;
2411
		goto __error;
2412
	}
2413
	memset(setup, 0, sizeof(setup));
2414
	if (file->f_mode & FMODE_WRITE)
2415
		snd_pcm_oss_look_for_setup(pcm, SNDRV_PCM_STREAM_PLAYBACK,
2416
					   task_name, &setup[0]);
2417
	if (file->f_mode & FMODE_READ)
2418
		snd_pcm_oss_look_for_setup(pcm, SNDRV_PCM_STREAM_CAPTURE,
2419
					   task_name, &setup[1]);
2420

2421
	nonblock = !!(file->f_flags & O_NONBLOCK);
2422
	if (!nonblock)
2423
		nonblock = nonblock_open;
2424

2425
	init_waitqueue_entry(&wait, current);
2426
	add_wait_queue(&pcm->open_wait, &wait);
2427
	mutex_lock(&pcm->open_mutex);
2428
	while (1) {
2429
		err = snd_pcm_oss_open_file(file, pcm, &pcm_oss_file,
2430
					    iminor(inode), setup);
2431
		if (err >= 0)
2432
			break;
2433
		if (err == -EAGAIN) {
2434
			if (nonblock) {
2435
				err = -EBUSY;
2436
				break;
2437
			}
2438
		} else
2439
			break;
2440
		set_current_state(TASK_INTERRUPTIBLE);
2441
		mutex_unlock(&pcm->open_mutex);
2442
		schedule();
2443
		mutex_lock(&pcm->open_mutex);
2444
		if (signal_pending(current)) {
2445
			err = -ERESTARTSYS;
2446
			break;
2447
		}
2448
	}
2449
	remove_wait_queue(&pcm->open_wait, &wait);
2450
	mutex_unlock(&pcm->open_mutex);
2451
	if (err < 0)
2452
		goto __error;
2453
	return err;
2454

2455
      __error:
2456
     	module_put(pcm->card->module);
2457
      __error2:
2458
      	snd_card_file_remove(pcm->card, file);
2459
      __error1:
2460
	return err;
2461
}
2462

2463
static int snd_pcm_oss_release(struct inode *inode, struct file *file)
2464
{
2465
	struct snd_pcm *pcm;
2466
	struct snd_pcm_substream *substream;
2467
	struct snd_pcm_oss_file *pcm_oss_file;
2468

2469
	pcm_oss_file = file->private_data;
2470
	substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
2471
	if (substream == NULL)
2472
		substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
2473
	if (snd_BUG_ON(!substream))
2474
		return -ENXIO;
2475
	pcm = substream->pcm;
2476
	if (!pcm->card->shutdown)
2477
		snd_pcm_oss_sync(pcm_oss_file);
2478
	mutex_lock(&pcm->open_mutex);
2479
	snd_pcm_oss_release_file(pcm_oss_file);
2480
	mutex_unlock(&pcm->open_mutex);
2481
	wake_up(&pcm->open_wait);
2482
	module_put(pcm->card->module);
2483
	snd_card_file_remove(pcm->card, file);
2484
	return 0;
2485
}
2486

2487
static long snd_pcm_oss_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
2488
{
2489
	struct snd_pcm_oss_file *pcm_oss_file;
2490
	int __user *p = (int __user *)arg;
2491
	int res;
2492

2493
	pcm_oss_file = file->private_data;
2494
	if (cmd == OSS_GETVERSION)
2495
		return put_user(SNDRV_OSS_VERSION, p);
2496
	if (cmd == OSS_ALSAEMULVER)
2497
		return put_user(1, p);
2498
#if defined(CONFIG_SND_MIXER_OSS) || (defined(MODULE) && defined(CONFIG_SND_MIXER_OSS_MODULE))
2499
	if (((cmd >> 8) & 0xff) == 'M')	{	/* mixer ioctl - for OSS compatibility */
2500
		struct snd_pcm_substream *substream;
2501
		int idx;
2502
		for (idx = 0; idx < 2; ++idx) {
2503
			substream = pcm_oss_file->streams[idx];
2504
			if (substream != NULL)
2505
				break;
2506
		}
2507
		if (snd_BUG_ON(idx >= 2))
2508
			return -ENXIO;
2509
		return snd_mixer_oss_ioctl_card(substream->pcm->card, cmd, arg);
2510
	}
2511
#endif
2512
	if (((cmd >> 8) & 0xff) != 'P')
2513
		return -EINVAL;
2514
#ifdef OSS_DEBUG
2515
	printk(KERN_DEBUG "pcm_oss: ioctl = 0x%x\n", cmd);
2516
#endif
2517
	switch (cmd) {
2518
	case SNDCTL_DSP_RESET:
2519
		return snd_pcm_oss_reset(pcm_oss_file);
2520
	case SNDCTL_DSP_SYNC:
2521
		return snd_pcm_oss_sync(pcm_oss_file);
2522
	case SNDCTL_DSP_SPEED:
2523
		if (get_user(res, p))
2524
			return -EFAULT;
2525
		if ((res = snd_pcm_oss_set_rate(pcm_oss_file, res))<0)
2526
			return res;
2527
		return put_user(res, p);
2528
	case SOUND_PCM_READ_RATE:
2529
		res = snd_pcm_oss_get_rate(pcm_oss_file);
2530
		if (res < 0)
2531
			return res;
2532
		return put_user(res, p);
2533
	case SNDCTL_DSP_STEREO:
2534
		if (get_user(res, p))
2535
			return -EFAULT;
2536
		res = res > 0 ? 2 : 1;
2537
		if ((res = snd_pcm_oss_set_channels(pcm_oss_file, res)) < 0)
2538
			return res;
2539
		return put_user(--res, p);
2540
	case SNDCTL_DSP_GETBLKSIZE:
2541
		res = snd_pcm_oss_get_block_size(pcm_oss_file);
2542
		if (res < 0)
2543
			return res;
2544
		return put_user(res, p);
2545
	case SNDCTL_DSP_SETFMT:
2546
		if (get_user(res, p))
2547
			return -EFAULT;
2548
		res = snd_pcm_oss_set_format(pcm_oss_file, res);
2549
		if (res < 0)
2550
			return res;
2551
		return put_user(res, p);
2552
	case SOUND_PCM_READ_BITS:
2553
		res = snd_pcm_oss_get_format(pcm_oss_file);
2554
		if (res < 0)
2555
			return res;
2556
		return put_user(res, p);
2557
	case SNDCTL_DSP_CHANNELS:
2558
		if (get_user(res, p))
2559
			return -EFAULT;
2560
		res = snd_pcm_oss_set_channels(pcm_oss_file, res);
2561
		if (res < 0)
2562
			return res;
2563
		return put_user(res, p);
2564
	case SOUND_PCM_READ_CHANNELS:
2565
		res = snd_pcm_oss_get_channels(pcm_oss_file);
2566
		if (res < 0)
2567
			return res;
2568
		return put_user(res, p);
2569
	case SOUND_PCM_WRITE_FILTER:
2570
	case SOUND_PCM_READ_FILTER:
2571
		return -EIO;
2572
	case SNDCTL_DSP_POST:
2573
		return snd_pcm_oss_post(pcm_oss_file);
2574
	case SNDCTL_DSP_SUBDIVIDE:
2575
		if (get_user(res, p))
2576
			return -EFAULT;
2577
		res = snd_pcm_oss_set_subdivide(pcm_oss_file, res);
2578
		if (res < 0)
2579
			return res;
2580
		return put_user(res, p);
2581
	case SNDCTL_DSP_SETFRAGMENT:
2582
		if (get_user(res, p))
2583
			return -EFAULT;
2584
		return snd_pcm_oss_set_fragment(pcm_oss_file, res);
2585
	case SNDCTL_DSP_GETFMTS:
2586
		res = snd_pcm_oss_get_formats(pcm_oss_file);
2587
		if (res < 0)
2588
			return res;
2589
		return put_user(res, p);
2590
	case SNDCTL_DSP_GETOSPACE:
2591
	case SNDCTL_DSP_GETISPACE:
2592
		return snd_pcm_oss_get_space(pcm_oss_file,
2593
			cmd == SNDCTL_DSP_GETISPACE ?
2594
				SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK,
2595
			(struct audio_buf_info __user *) arg);
2596
	case SNDCTL_DSP_NONBLOCK:
2597
		return snd_pcm_oss_nonblock(file);
2598
	case SNDCTL_DSP_GETCAPS:
2599
		res = snd_pcm_oss_get_caps(pcm_oss_file);
2600
		if (res < 0)
2601
			return res;
2602
		return put_user(res, p);
2603
	case SNDCTL_DSP_GETTRIGGER:
2604
		res = snd_pcm_oss_get_trigger(pcm_oss_file);
2605
		if (res < 0)
2606
			return res;
2607
		return put_user(res, p);
2608
	case SNDCTL_DSP_SETTRIGGER:
2609
		if (get_user(res, p))
2610
			return -EFAULT;
2611
		return snd_pcm_oss_set_trigger(pcm_oss_file, res);
2612
	case SNDCTL_DSP_GETIPTR:
2613
	case SNDCTL_DSP_GETOPTR:
2614
		return snd_pcm_oss_get_ptr(pcm_oss_file,
2615
			cmd == SNDCTL_DSP_GETIPTR ?
2616
				SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK,
2617
			(struct count_info __user *) arg);
2618
	case SNDCTL_DSP_MAPINBUF:
2619
	case SNDCTL_DSP_MAPOUTBUF:
2620
		return snd_pcm_oss_get_mapbuf(pcm_oss_file,
2621
			cmd == SNDCTL_DSP_MAPINBUF ?
2622
				SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK,
2623
			(struct buffmem_desc __user *) arg);
2624
	case SNDCTL_DSP_SETSYNCRO:
2625
		/* stop DMA now.. */
2626
		return 0;
2627
	case SNDCTL_DSP_SETDUPLEX:
2628
		if (snd_pcm_oss_get_caps(pcm_oss_file) & DSP_CAP_DUPLEX)
2629
			return 0;
2630
		return -EIO;
2631
	case SNDCTL_DSP_GETODELAY:
2632
		res = snd_pcm_oss_get_odelay(pcm_oss_file);
2633
		if (res < 0) {
2634
			/* it's for sure, some broken apps don't check for error codes */
2635
			put_user(0, p);
2636
			return res;
2637
		}
2638
		return put_user(res, p);
2639
	case SNDCTL_DSP_PROFILE:
2640
		return 0;	/* silently ignore */
2641
	default:
2642
		snd_printd("pcm_oss: unknown command = 0x%x\n", cmd);
2643
	}
2644
	return -EINVAL;
2645
}
2646

2647
#ifdef CONFIG_COMPAT
2648
/* all compatible */
2649
#define snd_pcm_oss_ioctl_compat	snd_pcm_oss_ioctl
2650
#else
2651
#define snd_pcm_oss_ioctl_compat	NULL
2652
#endif
2653

2654
static ssize_t snd_pcm_oss_read(struct file *file, char __user *buf, size_t count, loff_t *offset)
2655
{
2656
	struct snd_pcm_oss_file *pcm_oss_file;
2657
	struct snd_pcm_substream *substream;
2658

2659
	pcm_oss_file = file->private_data;
2660
	substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
2661
	if (substream == NULL)
2662
		return -ENXIO;
2663
	substream->f_flags = file->f_flags & O_NONBLOCK;
2664
#ifndef OSS_DEBUG
2665
	return snd_pcm_oss_read1(substream, buf, count);
2666
#else
2667
	{
2668
		ssize_t res = snd_pcm_oss_read1(substream, buf, count);
2669
		printk(KERN_DEBUG "pcm_oss: read %li bytes "
2670
		       "(returned %li bytes)\n", (long)count, (long)res);
2671
		return res;
2672
	}
2673
#endif
2674
}
2675

2676
static ssize_t snd_pcm_oss_write(struct file *file, const char __user *buf, size_t count, loff_t *offset)
2677
{
2678
	struct snd_pcm_oss_file *pcm_oss_file;
2679
	struct snd_pcm_substream *substream;
2680
	long result;
2681

2682
	pcm_oss_file = file->private_data;
2683
	substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
2684
	if (substream == NULL)
2685
		return -ENXIO;
2686
	substream->f_flags = file->f_flags & O_NONBLOCK;
2687
	result = snd_pcm_oss_write1(substream, buf, count);
2688
#ifdef OSS_DEBUG
2689
	printk(KERN_DEBUG "pcm_oss: write %li bytes (wrote %li bytes)\n",
2690
	       (long)count, (long)result);
2691
#endif
2692
	return result;
2693
}
2694

2695
static int snd_pcm_oss_playback_ready(struct snd_pcm_substream *substream)
2696
{
2697
	struct snd_pcm_runtime *runtime = substream->runtime;
2698
	if (atomic_read(&substream->mmap_count))
2699
		return runtime->oss.prev_hw_ptr_period !=
2700
						get_hw_ptr_period(runtime);
2701
	else
2702
		return snd_pcm_playback_avail(runtime) >=
2703
						runtime->oss.period_frames;
2704
}
2705

2706
static int snd_pcm_oss_capture_ready(struct snd_pcm_substream *substream)
2707
{
2708
	struct snd_pcm_runtime *runtime = substream->runtime;
2709
	if (atomic_read(&substream->mmap_count))
2710
		return runtime->oss.prev_hw_ptr_period !=
2711
						get_hw_ptr_period(runtime);
2712
	else
2713
		return snd_pcm_capture_avail(runtime) >=
2714
						runtime->oss.period_frames;
2715
}
2716

2717
static unsigned int snd_pcm_oss_poll(struct file *file, poll_table * wait)
2718
{
2719
	struct snd_pcm_oss_file *pcm_oss_file;
2720
	unsigned int mask;
2721
	struct snd_pcm_substream *psubstream = NULL, *csubstream = NULL;
2722
	
2723
	pcm_oss_file = file->private_data;
2724

2725
	psubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
2726
	csubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
2727

2728
	mask = 0;
2729
	if (psubstream != NULL) {
2730
		struct snd_pcm_runtime *runtime = psubstream->runtime;
2731
		poll_wait(file, &runtime->sleep, wait);
2732
		snd_pcm_stream_lock_irq(psubstream);
2733
		if (runtime->status->state != SNDRV_PCM_STATE_DRAINING &&
2734
		    (runtime->status->state != SNDRV_PCM_STATE_RUNNING ||
2735
		     snd_pcm_oss_playback_ready(psubstream)))
2736
			mask |= POLLOUT | POLLWRNORM;
2737
		snd_pcm_stream_unlock_irq(psubstream);
2738
	}
2739
	if (csubstream != NULL) {
2740
		struct snd_pcm_runtime *runtime = csubstream->runtime;
2741
		snd_pcm_state_t ostate;
2742
		poll_wait(file, &runtime->sleep, wait);
2743
		snd_pcm_stream_lock_irq(csubstream);
2744
		if ((ostate = runtime->status->state) != SNDRV_PCM_STATE_RUNNING ||
2745
		    snd_pcm_oss_capture_ready(csubstream))
2746
			mask |= POLLIN | POLLRDNORM;
2747
		snd_pcm_stream_unlock_irq(csubstream);
2748
		if (ostate != SNDRV_PCM_STATE_RUNNING && runtime->oss.trigger) {
2749
			struct snd_pcm_oss_file ofile;
2750
			memset(&ofile, 0, sizeof(ofile));
2751
			ofile.streams[SNDRV_PCM_STREAM_CAPTURE] = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
2752
			runtime->oss.trigger = 0;
2753
			snd_pcm_oss_set_trigger(&ofile, PCM_ENABLE_INPUT);
2754
		}
2755
	}
2756

2757
	return mask;
2758
}
2759

2760
static int snd_pcm_oss_mmap(struct file *file, struct vm_area_struct *area)
2761
{
2762
	struct snd_pcm_oss_file *pcm_oss_file;
2763
	struct snd_pcm_substream *substream = NULL;
2764
	struct snd_pcm_runtime *runtime;
2765
	int err;
2766

2767
#ifdef OSS_DEBUG
2768
	printk(KERN_DEBUG "pcm_oss: mmap begin\n");
2769
#endif
2770
	pcm_oss_file = file->private_data;
2771
	switch ((area->vm_flags & (VM_READ | VM_WRITE))) {
2772
	case VM_READ | VM_WRITE:
2773
		substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
2774
		if (substream)
2775
			break;
2776
		/* Fall through */
2777
	case VM_READ:
2778
		substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
2779
		break;
2780
	case VM_WRITE:
2781
		substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
2782
		break;
2783
	default:
2784
		return -EINVAL;
2785
	}
2786
	/* set VM_READ access as well to fix memset() routines that do
2787
	   reads before writes (to improve performance) */
2788
	area->vm_flags |= VM_READ;
2789
	if (substream == NULL)
2790
		return -ENXIO;
2791
	runtime = substream->runtime;
2792
	if (!(runtime->info & SNDRV_PCM_INFO_MMAP_VALID))
2793
		return -EIO;
2794
	if (runtime->info & SNDRV_PCM_INFO_INTERLEAVED)
2795
		runtime->access = SNDRV_PCM_ACCESS_MMAP_INTERLEAVED;
2796
	else
2797
		return -EIO;
2798
	
2799
	if (runtime->oss.params) {
2800
		if ((err = snd_pcm_oss_change_params(substream)) < 0)
2801
			return err;
2802
	}
2803
#ifdef CONFIG_SND_PCM_OSS_PLUGINS
2804
	if (runtime->oss.plugin_first != NULL)
2805
		return -EIO;
2806
#endif
2807

2808
	if (area->vm_pgoff != 0)
2809
		return -EINVAL;
2810

2811
	err = snd_pcm_mmap_data(substream, file, area);
2812
	if (err < 0)
2813
		return err;
2814
	runtime->oss.mmap_bytes = area->vm_end - area->vm_start;
2815
	runtime->silence_threshold = 0;
2816
	runtime->silence_size = 0;
2817
#ifdef OSS_DEBUG
2818
	printk(KERN_DEBUG "pcm_oss: mmap ok, bytes = 0x%x\n",
2819
	       runtime->oss.mmap_bytes);
2820
#endif
2821
	/* In mmap mode we never stop */
2822
	runtime->stop_threshold = runtime->boundary;
2823

2824
	return 0;
2825
}
2826

2827
#ifdef CONFIG_SND_VERBOSE_PROCFS
2828
/*
2829
 *  /proc interface
2830
 */
2831

2832
static void snd_pcm_oss_proc_read(struct snd_info_entry *entry,
2833
				  struct snd_info_buffer *buffer)
2834
{
2835
	struct snd_pcm_str *pstr = entry->private_data;
2836
	struct snd_pcm_oss_setup *setup = pstr->oss.setup_list;
2837
	mutex_lock(&pstr->oss.setup_mutex);
2838
	while (setup) {
2839
		snd_iprintf(buffer, "%s %u %u%s%s%s%s%s%s\n",
2840
			    setup->task_name,
2841
			    setup->periods,
2842
			    setup->period_size,
2843
			    setup->disable ? " disable" : "",
2844
			    setup->direct ? " direct" : "",
2845
			    setup->block ? " block" : "",
2846
			    setup->nonblock ? " non-block" : "",
2847
			    setup->partialfrag ? " partial-frag" : "",
2848
			    setup->nosilence ? " no-silence" : "");
2849
		setup = setup->next;
2850
	}
2851
	mutex_unlock(&pstr->oss.setup_mutex);
2852
}
2853

2854
static void snd_pcm_oss_proc_free_setup_list(struct snd_pcm_str * pstr)
2855
{
2856
	struct snd_pcm_oss_setup *setup, *setupn;
2857

2858
	for (setup = pstr->oss.setup_list, pstr->oss.setup_list = NULL;
2859
	     setup; setup = setupn) {
2860
		setupn = setup->next;
2861
		kfree(setup->task_name);
2862
		kfree(setup);
2863
	}
2864
	pstr->oss.setup_list = NULL;
2865
}
2866

2867
static void snd_pcm_oss_proc_write(struct snd_info_entry *entry,
2868
				   struct snd_info_buffer *buffer)
2869
{
2870
	struct snd_pcm_str *pstr = entry->private_data;
2871
	char line[128], str[32], task_name[32];
2872
	const char *ptr;
2873
	int idx1;
2874
	struct snd_pcm_oss_setup *setup, *setup1, template;
2875

2876
	while (!snd_info_get_line(buffer, line, sizeof(line))) {
2877
		mutex_lock(&pstr->oss.setup_mutex);
2878
		memset(&template, 0, sizeof(template));
2879
		ptr = snd_info_get_str(task_name, line, sizeof(task_name));
2880
		if (!strcmp(task_name, "clear") || !strcmp(task_name, "erase")) {
2881
			snd_pcm_oss_proc_free_setup_list(pstr);
2882
			mutex_unlock(&pstr->oss.setup_mutex);
2883
			continue;
2884
		}
2885
		for (setup = pstr->oss.setup_list; setup; setup = setup->next) {
2886
			if (!strcmp(setup->task_name, task_name)) {
2887
				template = *setup;
2888
				break;
2889
			}
2890
		}
2891
		ptr = snd_info_get_str(str, ptr, sizeof(str));
2892
		template.periods = simple_strtoul(str, NULL, 10);
2893
		ptr = snd_info_get_str(str, ptr, sizeof(str));
2894
		template.period_size = simple_strtoul(str, NULL, 10);
2895
		for (idx1 = 31; idx1 >= 0; idx1--)
2896
			if (template.period_size & (1 << idx1))
2897
				break;
2898
		for (idx1--; idx1 >= 0; idx1--)
2899
			template.period_size &= ~(1 << idx1);
2900
		do {
2901
			ptr = snd_info_get_str(str, ptr, sizeof(str));
2902
			if (!strcmp(str, "disable")) {
2903
				template.disable = 1;
2904
			} else if (!strcmp(str, "direct")) {
2905
				template.direct = 1;
2906
			} else if (!strcmp(str, "block")) {
2907
				template.block = 1;
2908
			} else if (!strcmp(str, "non-block")) {
2909
				template.nonblock = 1;
2910
			} else if (!strcmp(str, "partial-frag")) {
2911
				template.partialfrag = 1;
2912
			} else if (!strcmp(str, "no-silence")) {
2913
				template.nosilence = 1;
2914
			} else if (!strcmp(str, "buggy-ptr")) {
2915
				template.buggyptr = 1;
2916
			}
2917
		} while (*str);
2918
		if (setup == NULL) {
2919
			setup = kmalloc(sizeof(*setup), GFP_KERNEL);
2920
			if (! setup) {
2921
				buffer->error = -ENOMEM;
2922
				mutex_unlock(&pstr->oss.setup_mutex);
2923
				return;
2924
			}
2925
			if (pstr->oss.setup_list == NULL)
2926
				pstr->oss.setup_list = setup;
2927
			else {
2928
				for (setup1 = pstr->oss.setup_list;
2929
				     setup1->next; setup1 = setup1->next);
2930
				setup1->next = setup;
2931
			}
2932
			template.task_name = kstrdup(task_name, GFP_KERNEL);
2933
			if (! template.task_name) {
2934
				kfree(setup);
2935
				buffer->error = -ENOMEM;
2936
				mutex_unlock(&pstr->oss.setup_mutex);
2937
				return;
2938
			}
2939
		}
2940
		*setup = template;
2941
		mutex_unlock(&pstr->oss.setup_mutex);
2942
	}
2943
}
2944

2945
static void snd_pcm_oss_proc_init(struct snd_pcm *pcm)
2946
{
2947
	int stream;
2948
	for (stream = 0; stream < 2; ++stream) {
2949
		struct snd_info_entry *entry;
2950
		struct snd_pcm_str *pstr = &pcm->streams[stream];
2951
		if (pstr->substream_count == 0)
2952
			continue;
2953
		if ((entry = snd_info_create_card_entry(pcm->card, "oss", pstr->proc_root)) != NULL) {
2954
			entry->content = SNDRV_INFO_CONTENT_TEXT;
2955
			entry->mode = S_IFREG | S_IRUGO | S_IWUSR;
2956
			entry->c.text.read = snd_pcm_oss_proc_read;
2957
			entry->c.text.write = snd_pcm_oss_proc_write;
2958
			entry->private_data = pstr;
2959
			if (snd_info_register(entry) < 0) {
2960
				snd_info_free_entry(entry);
2961
				entry = NULL;
2962
			}
2963
		}
2964
		pstr->oss.proc_entry = entry;
2965
	}
2966
}
2967

2968
static void snd_pcm_oss_proc_done(struct snd_pcm *pcm)
2969
{
2970
	int stream;
2971
	for (stream = 0; stream < 2; ++stream) {
2972
		struct snd_pcm_str *pstr = &pcm->streams[stream];
2973
		snd_info_free_entry(pstr->oss.proc_entry);
2974
		pstr->oss.proc_entry = NULL;
2975
		snd_pcm_oss_proc_free_setup_list(pstr);
2976
	}
2977
}
2978
#else /* !CONFIG_SND_VERBOSE_PROCFS */
2979
#define snd_pcm_oss_proc_init(pcm)
2980
#define snd_pcm_oss_proc_done(pcm)
2981
#endif /* CONFIG_SND_VERBOSE_PROCFS */
2982

2983
/*
2984
 *  ENTRY functions
2985
 */
2986

2987
static const struct file_operations snd_pcm_oss_f_reg =
2988
{
2989
	.owner =	THIS_MODULE,
2990
	.read =		snd_pcm_oss_read,
2991
	.write =	snd_pcm_oss_write,
2992
	.open =		snd_pcm_oss_open,
2993
	.release =	snd_pcm_oss_release,
2994
	.llseek =	no_llseek,
2995
	.poll =		snd_pcm_oss_poll,
2996
	.unlocked_ioctl =	snd_pcm_oss_ioctl,
2997
	.compat_ioctl =	snd_pcm_oss_ioctl_compat,
2998
	.mmap =		snd_pcm_oss_mmap,
2999
};
3000

3001
static void register_oss_dsp(struct snd_pcm *pcm, int index)
3002
{
3003
	char name[128];
3004
	sprintf(name, "dsp%i%i", pcm->card->number, pcm->device);
3005
	if (snd_register_oss_device(SNDRV_OSS_DEVICE_TYPE_PCM,
3006
				    pcm->card, index, &snd_pcm_oss_f_reg,
3007
				    pcm, name) < 0) {
3008
		snd_printk(KERN_ERR "unable to register OSS PCM device %i:%i\n",
3009
			   pcm->card->number, pcm->device);
3010
	}
3011
}
3012

3013
static int snd_pcm_oss_register_minor(struct snd_pcm *pcm)
3014
{
3015
	pcm->oss.reg = 0;
3016
	if (dsp_map[pcm->card->number] == (int)pcm->device) {
3017
		char name[128];
3018
		int duplex;
3019
		register_oss_dsp(pcm, 0);
3020
		duplex = (pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream_count > 0 && 
3021
			      pcm->streams[SNDRV_PCM_STREAM_CAPTURE].substream_count && 
3022
			      !(pcm->info_flags & SNDRV_PCM_INFO_HALF_DUPLEX));
3023
		sprintf(name, "%s%s", pcm->name, duplex ? " (DUPLEX)" : "");
3024
#ifdef SNDRV_OSS_INFO_DEV_AUDIO
3025
		snd_oss_info_register(SNDRV_OSS_INFO_DEV_AUDIO,
3026
				      pcm->card->number,
3027
				      name);
3028
#endif
3029
		pcm->oss.reg++;
3030
		pcm->oss.reg_mask |= 1;
3031
	}
3032
	if (adsp_map[pcm->card->number] == (int)pcm->device) {
3033
		register_oss_dsp(pcm, 1);
3034
		pcm->oss.reg++;
3035
		pcm->oss.reg_mask |= 2;
3036
	}
3037

3038
	if (pcm->oss.reg)
3039
		snd_pcm_oss_proc_init(pcm);
3040

3041
	return 0;
3042
}
3043

3044
static int snd_pcm_oss_disconnect_minor(struct snd_pcm *pcm)
3045
{
3046
	if (pcm->oss.reg) {
3047
		if (pcm->oss.reg_mask & 1) {
3048
			pcm->oss.reg_mask &= ~1;
3049
			snd_unregister_oss_device(SNDRV_OSS_DEVICE_TYPE_PCM,
3050
						  pcm->card, 0);
3051
		}
3052
		if (pcm->oss.reg_mask & 2) {
3053
			pcm->oss.reg_mask &= ~2;
3054
			snd_unregister_oss_device(SNDRV_OSS_DEVICE_TYPE_PCM,
3055
						  pcm->card, 1);
3056
		}
3057
		if (dsp_map[pcm->card->number] == (int)pcm->device) {
3058
#ifdef SNDRV_OSS_INFO_DEV_AUDIO
3059
			snd_oss_info_unregister(SNDRV_OSS_INFO_DEV_AUDIO, pcm->card->number);
3060
#endif
3061
		}
3062
		pcm->oss.reg = 0;
3063
	}
3064
	return 0;
3065
}
3066

3067
static int snd_pcm_oss_unregister_minor(struct snd_pcm *pcm)
3068
{
3069
	snd_pcm_oss_disconnect_minor(pcm);
3070
	snd_pcm_oss_proc_done(pcm);
3071
	return 0;
3072
}
3073

3074
static struct snd_pcm_notify snd_pcm_oss_notify =
3075
{
3076
	.n_register =	snd_pcm_oss_register_minor,
3077
	.n_disconnect = snd_pcm_oss_disconnect_minor,
3078
	.n_unregister =	snd_pcm_oss_unregister_minor,
3079
};
3080

3081
static int __init alsa_pcm_oss_init(void)
3082
{
3083
	int i;
3084
	int err;
3085

3086
	/* check device map table */
3087
	for (i = 0; i < SNDRV_CARDS; i++) {
3088
		if (dsp_map[i] < 0 || dsp_map[i] >= SNDRV_PCM_DEVICES) {
3089
			snd_printk(KERN_ERR "invalid dsp_map[%d] = %d\n",
3090
				   i, dsp_map[i]);
3091
			dsp_map[i] = 0;
3092
		}
3093
		if (adsp_map[i] < 0 || adsp_map[i] >= SNDRV_PCM_DEVICES) {
3094
			snd_printk(KERN_ERR "invalid adsp_map[%d] = %d\n",
3095
				   i, adsp_map[i]);
3096
			adsp_map[i] = 1;
3097
		}
3098
	}
3099
	if ((err = snd_pcm_notify(&snd_pcm_oss_notify, 0)) < 0)
3100
		return err;
3101
	return 0;
3102
}
3103

3104
static void __exit alsa_pcm_oss_exit(void)
3105
{
3106
	snd_pcm_notify(&snd_pcm_oss_notify, 1);
3107
}
3108

3109
module_init(alsa_pcm_oss_init)
3110
module_exit(alsa_pcm_oss_exit)
3111

3112
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