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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/module.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 bool 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 
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 
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 
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 
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 
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 
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 (pcm->card->shutdown) {
2445  err = -ENODEV;
2446  break;
2447  }
2448  if (signal_pending(current)) {
2449  err = -ERESTARTSYS;
2450  break;
2451  }
2452  }
2453  remove_wait_queue(&pcm->open_wait, &wait);
2454  mutex_unlock(&pcm->open_mutex);
2455  if (err < 0)
2456  goto __error;
2457  snd_card_unref(pcm->card);
2458  return err;
2459 
2460  __error:
2461  module_put(pcm->card->module);
2462  __error2:
2463  snd_card_file_remove(pcm->card, file);
2464  __error1:
2465  if (pcm)
2466  snd_card_unref(pcm->card);
2467  return err;
2468 }
2469 
2470 static int snd_pcm_oss_release(struct inode *inode, struct file *file)
2471 {
2472  struct snd_pcm *pcm;
2473  struct snd_pcm_substream *substream;
2474  struct snd_pcm_oss_file *pcm_oss_file;
2475 
2476  pcm_oss_file = file->private_data;
2477  substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
2478  if (substream == NULL)
2479  substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
2480  if (snd_BUG_ON(!substream))
2481  return -ENXIO;
2482  pcm = substream->pcm;
2483  if (!pcm->card->shutdown)
2484  snd_pcm_oss_sync(pcm_oss_file);
2485  mutex_lock(&pcm->open_mutex);
2486  snd_pcm_oss_release_file(pcm_oss_file);
2487  mutex_unlock(&pcm->open_mutex);
2488  wake_up(&pcm->open_wait);
2489  module_put(pcm->card->module);
2490  snd_card_file_remove(pcm->card, file);
2491  return 0;
2492 }
2493 
2494 static long snd_pcm_oss_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
2495 {
2496  struct snd_pcm_oss_file *pcm_oss_file;
2497  int __user *p = (int __user *)arg;
2498  int res;
2499 
2500  pcm_oss_file = file->private_data;
2501  if (cmd == OSS_GETVERSION)
2502  return put_user(SNDRV_OSS_VERSION, p);
2503  if (cmd == OSS_ALSAEMULVER)
2504  return put_user(1, p);
2505 #if defined(CONFIG_SND_MIXER_OSS) || (defined(MODULE) && defined(CONFIG_SND_MIXER_OSS_MODULE))
2506  if (((cmd >> 8) & 0xff) == 'M') { /* mixer ioctl - for OSS compatibility */
2507  struct snd_pcm_substream *substream;
2508  int idx;
2509  for (idx = 0; idx < 2; ++idx) {
2510  substream = pcm_oss_file->streams[idx];
2511  if (substream != NULL)
2512  break;
2513  }
2514  if (snd_BUG_ON(idx >= 2))
2515  return -ENXIO;
2516  return snd_mixer_oss_ioctl_card(substream->pcm->card, cmd, arg);
2517  }
2518 #endif
2519  if (((cmd >> 8) & 0xff) != 'P')
2520  return -EINVAL;
2521 #ifdef OSS_DEBUG
2522  printk(KERN_DEBUG "pcm_oss: ioctl = 0x%x\n", cmd);
2523 #endif
2524  switch (cmd) {
2525  case SNDCTL_DSP_RESET:
2526  return snd_pcm_oss_reset(pcm_oss_file);
2527  case SNDCTL_DSP_SYNC:
2528  return snd_pcm_oss_sync(pcm_oss_file);
2529  case SNDCTL_DSP_SPEED:
2530  if (get_user(res, p))
2531  return -EFAULT;
2532  if ((res = snd_pcm_oss_set_rate(pcm_oss_file, res))<0)
2533  return res;
2534  return put_user(res, p);
2535  case SOUND_PCM_READ_RATE:
2536  res = snd_pcm_oss_get_rate(pcm_oss_file);
2537  if (res < 0)
2538  return res;
2539  return put_user(res, p);
2540  case SNDCTL_DSP_STEREO:
2541  if (get_user(res, p))
2542  return -EFAULT;
2543  res = res > 0 ? 2 : 1;
2544  if ((res = snd_pcm_oss_set_channels(pcm_oss_file, res)) < 0)
2545  return res;
2546  return put_user(--res, p);
2547  case SNDCTL_DSP_GETBLKSIZE:
2548  res = snd_pcm_oss_get_block_size(pcm_oss_file);
2549  if (res < 0)
2550  return res;
2551  return put_user(res, p);
2552  case SNDCTL_DSP_SETFMT:
2553  if (get_user(res, p))
2554  return -EFAULT;
2555  res = snd_pcm_oss_set_format(pcm_oss_file, res);
2556  if (res < 0)
2557  return res;
2558  return put_user(res, p);
2559  case SOUND_PCM_READ_BITS:
2560  res = snd_pcm_oss_get_format(pcm_oss_file);
2561  if (res < 0)
2562  return res;
2563  return put_user(res, p);
2564  case SNDCTL_DSP_CHANNELS:
2565  if (get_user(res, p))
2566  return -EFAULT;
2567  res = snd_pcm_oss_set_channels(pcm_oss_file, res);
2568  if (res < 0)
2569  return res;
2570  return put_user(res, p);
2571  case SOUND_PCM_READ_CHANNELS:
2572  res = snd_pcm_oss_get_channels(pcm_oss_file);
2573  if (res < 0)
2574  return res;
2575  return put_user(res, p);
2576  case SOUND_PCM_WRITE_FILTER:
2577  case SOUND_PCM_READ_FILTER:
2578  return -EIO;
2579  case SNDCTL_DSP_POST:
2580  return snd_pcm_oss_post(pcm_oss_file);
2581  case SNDCTL_DSP_SUBDIVIDE:
2582  if (get_user(res, p))
2583  return -EFAULT;
2584  res = snd_pcm_oss_set_subdivide(pcm_oss_file, res);
2585  if (res < 0)
2586  return res;
2587  return put_user(res, p);
2588  case SNDCTL_DSP_SETFRAGMENT:
2589  if (get_user(res, p))
2590  return -EFAULT;
2591  return snd_pcm_oss_set_fragment(pcm_oss_file, res);
2592  case SNDCTL_DSP_GETFMTS:
2593  res = snd_pcm_oss_get_formats(pcm_oss_file);
2594  if (res < 0)
2595  return res;
2596  return put_user(res, p);
2597  case SNDCTL_DSP_GETOSPACE:
2598  case SNDCTL_DSP_GETISPACE:
2599  return snd_pcm_oss_get_space(pcm_oss_file,
2600  cmd == SNDCTL_DSP_GETISPACE ?
2601  SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK,
2602  (struct audio_buf_info __user *) arg);
2603  case SNDCTL_DSP_NONBLOCK:
2604  return snd_pcm_oss_nonblock(file);
2605  case SNDCTL_DSP_GETCAPS:
2606  res = snd_pcm_oss_get_caps(pcm_oss_file);
2607  if (res < 0)
2608  return res;
2609  return put_user(res, p);
2610  case SNDCTL_DSP_GETTRIGGER:
2611  res = snd_pcm_oss_get_trigger(pcm_oss_file);
2612  if (res < 0)
2613  return res;
2614  return put_user(res, p);
2615  case SNDCTL_DSP_SETTRIGGER:
2616  if (get_user(res, p))
2617  return -EFAULT;
2618  return snd_pcm_oss_set_trigger(pcm_oss_file, res);
2619  case SNDCTL_DSP_GETIPTR:
2620  case SNDCTL_DSP_GETOPTR:
2621  return snd_pcm_oss_get_ptr(pcm_oss_file,
2622  cmd == SNDCTL_DSP_GETIPTR ?
2623  SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK,
2624  (struct count_info __user *) arg);
2625  case SNDCTL_DSP_MAPINBUF:
2626  case SNDCTL_DSP_MAPOUTBUF:
2627  return snd_pcm_oss_get_mapbuf(pcm_oss_file,
2628  cmd == SNDCTL_DSP_MAPINBUF ?
2629  SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK,
2630  (struct buffmem_desc __user *) arg);
2631  case SNDCTL_DSP_SETSYNCRO:
2632  /* stop DMA now.. */
2633  return 0;
2634  case SNDCTL_DSP_SETDUPLEX:
2635  if (snd_pcm_oss_get_caps(pcm_oss_file) & DSP_CAP_DUPLEX)
2636  return 0;
2637  return -EIO;
2638  case SNDCTL_DSP_GETODELAY:
2639  res = snd_pcm_oss_get_odelay(pcm_oss_file);
2640  if (res < 0) {
2641  /* it's for sure, some broken apps don't check for error codes */
2642  put_user(0, p);
2643  return res;
2644  }
2645  return put_user(res, p);
2646  case SNDCTL_DSP_PROFILE:
2647  return 0; /* silently ignore */
2648  default:
2649  snd_printd("pcm_oss: unknown command = 0x%x\n", cmd);
2650  }
2651  return -EINVAL;
2652 }
2653 
2654 #ifdef CONFIG_COMPAT
2655 /* all compatible */
2656 #define snd_pcm_oss_ioctl_compat snd_pcm_oss_ioctl
2657 #else
2658 #define snd_pcm_oss_ioctl_compat NULL
2659 #endif
2660 
2661 static ssize_t snd_pcm_oss_read(struct file *file, char __user *buf, size_t count, loff_t *offset)
2662 {
2663  struct snd_pcm_oss_file *pcm_oss_file;
2664  struct snd_pcm_substream *substream;
2665 
2666  pcm_oss_file = file->private_data;
2667  substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
2668  if (substream == NULL)
2669  return -ENXIO;
2670  substream->f_flags = file->f_flags & O_NONBLOCK;
2671 #ifndef OSS_DEBUG
2672  return snd_pcm_oss_read1(substream, buf, count);
2673 #else
2674  {
2675  ssize_t res = snd_pcm_oss_read1(substream, buf, count);
2676  printk(KERN_DEBUG "pcm_oss: read %li bytes "
2677  "(returned %li bytes)\n", (long)count, (long)res);
2678  return res;
2679  }
2680 #endif
2681 }
2682 
2683 static ssize_t snd_pcm_oss_write(struct file *file, const char __user *buf, size_t count, loff_t *offset)
2684 {
2685  struct snd_pcm_oss_file *pcm_oss_file;
2686  struct snd_pcm_substream *substream;
2687  long result;
2688 
2689  pcm_oss_file = file->private_data;
2690  substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
2691  if (substream == NULL)
2692  return -ENXIO;
2693  substream->f_flags = file->f_flags & O_NONBLOCK;
2694  result = snd_pcm_oss_write1(substream, buf, count);
2695 #ifdef OSS_DEBUG
2696  printk(KERN_DEBUG "pcm_oss: write %li bytes (wrote %li bytes)\n",
2697  (long)count, (long)result);
2698 #endif
2699  return result;
2700 }
2701 
2702 static int snd_pcm_oss_playback_ready(struct snd_pcm_substream *substream)
2703 {
2704  struct snd_pcm_runtime *runtime = substream->runtime;
2705  if (atomic_read(&substream->mmap_count))
2706  return runtime->oss.prev_hw_ptr_period !=
2707  get_hw_ptr_period(runtime);
2708  else
2709  return snd_pcm_playback_avail(runtime) >=
2710  runtime->oss.period_frames;
2711 }
2712 
2713 static int snd_pcm_oss_capture_ready(struct snd_pcm_substream *substream)
2714 {
2715  struct snd_pcm_runtime *runtime = substream->runtime;
2716  if (atomic_read(&substream->mmap_count))
2717  return runtime->oss.prev_hw_ptr_period !=
2718  get_hw_ptr_period(runtime);
2719  else
2720  return snd_pcm_capture_avail(runtime) >=
2721  runtime->oss.period_frames;
2722 }
2723 
2724 static unsigned int snd_pcm_oss_poll(struct file *file, poll_table * wait)
2725 {
2726  struct snd_pcm_oss_file *pcm_oss_file;
2727  unsigned int mask;
2728  struct snd_pcm_substream *psubstream = NULL, *csubstream = NULL;
2729 
2730  pcm_oss_file = file->private_data;
2731 
2732  psubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
2733  csubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
2734 
2735  mask = 0;
2736  if (psubstream != NULL) {
2737  struct snd_pcm_runtime *runtime = psubstream->runtime;
2738  poll_wait(file, &runtime->sleep, wait);
2739  snd_pcm_stream_lock_irq(psubstream);
2740  if (runtime->status->state != SNDRV_PCM_STATE_DRAINING &&
2741  (runtime->status->state != SNDRV_PCM_STATE_RUNNING ||
2742  snd_pcm_oss_playback_ready(psubstream)))
2743  mask |= POLLOUT | POLLWRNORM;
2744  snd_pcm_stream_unlock_irq(psubstream);
2745  }
2746  if (csubstream != NULL) {
2747  struct snd_pcm_runtime *runtime = csubstream->runtime;
2748  snd_pcm_state_t ostate;
2749  poll_wait(file, &runtime->sleep, wait);
2750  snd_pcm_stream_lock_irq(csubstream);
2751  if ((ostate = runtime->status->state) != SNDRV_PCM_STATE_RUNNING ||
2752  snd_pcm_oss_capture_ready(csubstream))
2753  mask |= POLLIN | POLLRDNORM;
2754  snd_pcm_stream_unlock_irq(csubstream);
2755  if (ostate != SNDRV_PCM_STATE_RUNNING && runtime->oss.trigger) {
2756  struct snd_pcm_oss_file ofile;
2757  memset(&ofile, 0, sizeof(ofile));
2758  ofile.streams[SNDRV_PCM_STREAM_CAPTURE] = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
2759  runtime->oss.trigger = 0;
2760  snd_pcm_oss_set_trigger(&ofile, PCM_ENABLE_INPUT);
2761  }
2762  }
2763 
2764  return mask;
2765 }
2766 
2767 static int snd_pcm_oss_mmap(struct file *file, struct vm_area_struct *area)
2768 {
2769  struct snd_pcm_oss_file *pcm_oss_file;
2770  struct snd_pcm_substream *substream = NULL;
2771  struct snd_pcm_runtime *runtime;
2772  int err;
2773 
2774 #ifdef OSS_DEBUG
2775  printk(KERN_DEBUG "pcm_oss: mmap begin\n");
2776 #endif
2777  pcm_oss_file = file->private_data;
2778  switch ((area->vm_flags & (VM_READ | VM_WRITE))) {
2779  case VM_READ | VM_WRITE:
2780  substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
2781  if (substream)
2782  break;
2783  /* Fall through */
2784  case VM_READ:
2785  substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
2786  break;
2787  case VM_WRITE:
2788  substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
2789  break;
2790  default:
2791  return -EINVAL;
2792  }
2793  /* set VM_READ access as well to fix memset() routines that do
2794  reads before writes (to improve performance) */
2795  area->vm_flags |= VM_READ;
2796  if (substream == NULL)
2797  return -ENXIO;
2798  runtime = substream->runtime;
2799  if (!(runtime->info & SNDRV_PCM_INFO_MMAP_VALID))
2800  return -EIO;
2801  if (runtime->info & SNDRV_PCM_INFO_INTERLEAVED)
2802  runtime->access = SNDRV_PCM_ACCESS_MMAP_INTERLEAVED;
2803  else
2804  return -EIO;
2805 
2806  if (runtime->oss.params) {
2807  if ((err = snd_pcm_oss_change_params(substream)) < 0)
2808  return err;
2809  }
2810 #ifdef CONFIG_SND_PCM_OSS_PLUGINS
2811  if (runtime->oss.plugin_first != NULL)
2812  return -EIO;
2813 #endif
2814 
2815  if (area->vm_pgoff != 0)
2816  return -EINVAL;
2817 
2818  err = snd_pcm_mmap_data(substream, file, area);
2819  if (err < 0)
2820  return err;
2821  runtime->oss.mmap_bytes = area->vm_end - area->vm_start;
2822  runtime->silence_threshold = 0;
2823  runtime->silence_size = 0;
2824 #ifdef OSS_DEBUG
2825  printk(KERN_DEBUG "pcm_oss: mmap ok, bytes = 0x%x\n",
2826  runtime->oss.mmap_bytes);
2827 #endif
2828  /* In mmap mode we never stop */
2829  runtime->stop_threshold = runtime->boundary;
2830 
2831  return 0;
2832 }
2833 
2834 #ifdef CONFIG_SND_VERBOSE_PROCFS
2835 /*
2836  * /proc interface
2837  */
2838 
2839 static void snd_pcm_oss_proc_read(struct snd_info_entry *entry,
2840  struct snd_info_buffer *buffer)
2841 {
2842  struct snd_pcm_str *pstr = entry->private_data;
2843  struct snd_pcm_oss_setup *setup = pstr->oss.setup_list;
2844  mutex_lock(&pstr->oss.setup_mutex);
2845  while (setup) {
2846  snd_iprintf(buffer, "%s %u %u%s%s%s%s%s%s\n",
2847  setup->task_name,
2848  setup->periods,
2849  setup->period_size,
2850  setup->disable ? " disable" : "",
2851  setup->direct ? " direct" : "",
2852  setup->block ? " block" : "",
2853  setup->nonblock ? " non-block" : "",
2854  setup->partialfrag ? " partial-frag" : "",
2855  setup->nosilence ? " no-silence" : "");
2856  setup = setup->next;
2857  }
2858  mutex_unlock(&pstr->oss.setup_mutex);
2859 }
2860 
2861 static void snd_pcm_oss_proc_free_setup_list(struct snd_pcm_str * pstr)
2862 {
2863  struct snd_pcm_oss_setup *setup, *setupn;
2864 
2865  for (setup = pstr->oss.setup_list, pstr->oss.setup_list = NULL;
2866  setup; setup = setupn) {
2867  setupn = setup->next;
2868  kfree(setup->task_name);
2869  kfree(setup);
2870  }
2871  pstr->oss.setup_list = NULL;
2872 }
2873 
2874 static void snd_pcm_oss_proc_write(struct snd_info_entry *entry,
2875  struct snd_info_buffer *buffer)
2876 {
2877  struct snd_pcm_str *pstr = entry->private_data;
2878  char line[128], str[32], task_name[32];
2879  const char *ptr;
2880  int idx1;
2881  struct snd_pcm_oss_setup *setup, *setup1, template;
2882 
2883  while (!snd_info_get_line(buffer, line, sizeof(line))) {
2884  mutex_lock(&pstr->oss.setup_mutex);
2885  memset(&template, 0, sizeof(template));
2886  ptr = snd_info_get_str(task_name, line, sizeof(task_name));
2887  if (!strcmp(task_name, "clear") || !strcmp(task_name, "erase")) {
2888  snd_pcm_oss_proc_free_setup_list(pstr);
2889  mutex_unlock(&pstr->oss.setup_mutex);
2890  continue;
2891  }
2892  for (setup = pstr->oss.setup_list; setup; setup = setup->next) {
2893  if (!strcmp(setup->task_name, task_name)) {
2894  template = *setup;
2895  break;
2896  }
2897  }
2898  ptr = snd_info_get_str(str, ptr, sizeof(str));
2899  template.periods = simple_strtoul(str, NULL, 10);
2900  ptr = snd_info_get_str(str, ptr, sizeof(str));
2901  template.period_size = simple_strtoul(str, NULL, 10);
2902  for (idx1 = 31; idx1 >= 0; idx1--)
2903  if (template.period_size & (1 << idx1))
2904  break;
2905  for (idx1--; idx1 >= 0; idx1--)
2906  template.period_size &= ~(1 << idx1);
2907  do {
2908  ptr = snd_info_get_str(str, ptr, sizeof(str));
2909  if (!strcmp(str, "disable")) {
2910  template.disable = 1;
2911  } else if (!strcmp(str, "direct")) {
2912  template.direct = 1;
2913  } else if (!strcmp(str, "block")) {
2914  template.block = 1;
2915  } else if (!strcmp(str, "non-block")) {
2916  template.nonblock = 1;
2917  } else if (!strcmp(str, "partial-frag")) {
2918  template.partialfrag = 1;
2919  } else if (!strcmp(str, "no-silence")) {
2920  template.nosilence = 1;
2921  } else if (!strcmp(str, "buggy-ptr")) {
2922  template.buggyptr = 1;
2923  }
2924  } while (*str);
2925  if (setup == NULL) {
2926  setup = kmalloc(sizeof(*setup), GFP_KERNEL);
2927  if (! setup) {
2928  buffer->error = -ENOMEM;
2929  mutex_unlock(&pstr->oss.setup_mutex);
2930  return;
2931  }
2932  if (pstr->oss.setup_list == NULL)
2933  pstr->oss.setup_list = setup;
2934  else {
2935  for (setup1 = pstr->oss.setup_list;
2936  setup1->next; setup1 = setup1->next);
2937  setup1->next = setup;
2938  }
2939  template.task_name = kstrdup(task_name, GFP_KERNEL);
2940  if (! template.task_name) {
2941  kfree(setup);
2942  buffer->error = -ENOMEM;
2943  mutex_unlock(&pstr->oss.setup_mutex);
2944  return;
2945  }
2946  }
2947  *setup = template;
2948  mutex_unlock(&pstr->oss.setup_mutex);
2949  }
2950 }
2951 
2952 static void snd_pcm_oss_proc_init(struct snd_pcm *pcm)
2953 {
2954  int stream;
2955  for (stream = 0; stream < 2; ++stream) {
2956  struct snd_info_entry *entry;
2957  struct snd_pcm_str *pstr = &pcm->streams[stream];
2958  if (pstr->substream_count == 0)
2959  continue;
2960  if ((entry = snd_info_create_card_entry(pcm->card, "oss", pstr->proc_root)) != NULL) {
2961  entry->content = SNDRV_INFO_CONTENT_TEXT;
2962  entry->mode = S_IFREG | S_IRUGO | S_IWUSR;
2963  entry->c.text.read = snd_pcm_oss_proc_read;
2964  entry->c.text.write = snd_pcm_oss_proc_write;
2965  entry->private_data = pstr;
2966  if (snd_info_register(entry) < 0) {
2967  snd_info_free_entry(entry);
2968  entry = NULL;
2969  }
2970  }
2971  pstr->oss.proc_entry = entry;
2972  }
2973 }
2974 
2975 static void snd_pcm_oss_proc_done(struct snd_pcm *pcm)
2976 {
2977  int stream;
2978  for (stream = 0; stream < 2; ++stream) {
2979  struct snd_pcm_str *pstr = &pcm->streams[stream];
2980  snd_info_free_entry(pstr->oss.proc_entry);
2981  pstr->oss.proc_entry = NULL;
2982  snd_pcm_oss_proc_free_setup_list(pstr);
2983  }
2984 }
2985 #else /* !CONFIG_SND_VERBOSE_PROCFS */
2986 #define snd_pcm_oss_proc_init(pcm)
2987 #define snd_pcm_oss_proc_done(pcm)
2988 #endif /* CONFIG_SND_VERBOSE_PROCFS */
2989 
2990 /*
2991  * ENTRY functions
2992  */
2993 
2994 static const struct file_operations snd_pcm_oss_f_reg =
2995 {
2996  .owner = THIS_MODULE,
2997  .read = snd_pcm_oss_read,
2998  .write = snd_pcm_oss_write,
2999  .open = snd_pcm_oss_open,
3000  .release = snd_pcm_oss_release,
3001  .llseek = no_llseek,
3002  .poll = snd_pcm_oss_poll,
3003  .unlocked_ioctl = snd_pcm_oss_ioctl,
3004  .compat_ioctl = snd_pcm_oss_ioctl_compat,
3005  .mmap = snd_pcm_oss_mmap,
3006 };
3007 
3008 static void register_oss_dsp(struct snd_pcm *pcm, int index)
3009 {
3010  char name[128];
3011  sprintf(name, "dsp%i%i", pcm->card->number, pcm->device);
3012  if (snd_register_oss_device(SNDRV_OSS_DEVICE_TYPE_PCM,
3013  pcm->card, index, &snd_pcm_oss_f_reg,
3014  pcm, name) < 0) {
3015  snd_printk(KERN_ERR "unable to register OSS PCM device %i:%i\n",
3016  pcm->card->number, pcm->device);
3017  }
3018 }
3019 
3020 static int snd_pcm_oss_register_minor(struct snd_pcm *pcm)
3021 {
3022  pcm->oss.reg = 0;
3023  if (dsp_map[pcm->card->number] == (int)pcm->device) {
3024  char name[128];
3025  int duplex;
3026  register_oss_dsp(pcm, 0);
3027  duplex = (pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream_count > 0 &&
3028  pcm->streams[SNDRV_PCM_STREAM_CAPTURE].substream_count &&
3029  !(pcm->info_flags & SNDRV_PCM_INFO_HALF_DUPLEX));
3030  sprintf(name, "%s%s", pcm->name, duplex ? " (DUPLEX)" : "");
3031 #ifdef SNDRV_OSS_INFO_DEV_AUDIO
3032  snd_oss_info_register(SNDRV_OSS_INFO_DEV_AUDIO,
3033  pcm->card->number,
3034  name);
3035 #endif
3036  pcm->oss.reg++;
3037  pcm->oss.reg_mask |= 1;
3038  }
3039  if (adsp_map[pcm->card->number] == (int)pcm->device) {
3040  register_oss_dsp(pcm, 1);
3041  pcm->oss.reg++;
3042  pcm->oss.reg_mask |= 2;
3043  }
3044 
3045  if (pcm->oss.reg)
3046  snd_pcm_oss_proc_init(pcm);
3047 
3048  return 0;
3049 }
3050 
3051 static int snd_pcm_oss_disconnect_minor(struct snd_pcm *pcm)
3052 {
3053  if (pcm->oss.reg) {
3054  if (pcm->oss.reg_mask & 1) {
3055  pcm->oss.reg_mask &= ~1;
3056  snd_unregister_oss_device(SNDRV_OSS_DEVICE_TYPE_PCM,
3057  pcm->card, 0);
3058  }
3059  if (pcm->oss.reg_mask & 2) {
3060  pcm->oss.reg_mask &= ~2;
3061  snd_unregister_oss_device(SNDRV_OSS_DEVICE_TYPE_PCM,
3062  pcm->card, 1);
3063  }
3064  if (dsp_map[pcm->card->number] == (int)pcm->device) {
3065 #ifdef SNDRV_OSS_INFO_DEV_AUDIO
3066  snd_oss_info_unregister(SNDRV_OSS_INFO_DEV_AUDIO, pcm->card->number);
3067 #endif
3068  }
3069  pcm->oss.reg = 0;
3070  }
3071  return 0;
3072 }
3073 
3074 static int snd_pcm_oss_unregister_minor(struct snd_pcm *pcm)
3075 {
3076  snd_pcm_oss_disconnect_minor(pcm);
3077  snd_pcm_oss_proc_done(pcm);
3078  return 0;
3079 }
3080 
3081 static struct snd_pcm_notify snd_pcm_oss_notify =
3082 {
3083  .n_register = snd_pcm_oss_register_minor,
3084  .n_disconnect = snd_pcm_oss_disconnect_minor,
3085  .n_unregister = snd_pcm_oss_unregister_minor,
3086 };
3087 
3088 static int __init alsa_pcm_oss_init(void)
3089 {
3090  int i;
3091  int err;
3092 
3093  /* check device map table */
3094  for (i = 0; i < SNDRV_CARDS; i++) {
3095  if (dsp_map[i] < 0 || dsp_map[i] >= SNDRV_PCM_DEVICES) {
3096  snd_printk(KERN_ERR "invalid dsp_map[%d] = %d\n",
3097  i, dsp_map[i]);
3098  dsp_map[i] = 0;
3099  }
3100  if (adsp_map[i] < 0 || adsp_map[i] >= SNDRV_PCM_DEVICES) {
3101  snd_printk(KERN_ERR "invalid adsp_map[%d] = %d\n",
3102  i, adsp_map[i]);
3103  adsp_map[i] = 1;
3104  }
3105  }
3106  if ((err = snd_pcm_notify(&snd_pcm_oss_notify, 0)) < 0)
3107  return err;
3108  return 0;
3109 }
3110 
3111 static void __exit alsa_pcm_oss_exit(void)
3112 {
3113  snd_pcm_notify(&snd_pcm_oss_notify, 1);
3114 }
3115 
3116 module_init(alsa_pcm_oss_init)
3117 module_exit(alsa_pcm_oss_exit)
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