Root/sound/core/oss/pcm_oss.c

1/*
2 * Digital Audio (PCM) abstract layer / OSS compatible
3 * Copyright (c) by Jaroslav Kysela <perex@perex.cz>
4 *
5 *
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2 of the License, or
9 * (at your option) any later version.
10 *
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
15 *
16 * You should have received a copy of the GNU General Public License
17 * along with this program; if not, write to the Free Software
18 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
19 *
20 */
21
22#if 0
23#define PLUGIN_DEBUG
24#endif
25#if 0
26#define OSS_DEBUG
27#endif
28
29#include <linux/init.h>
30#include <linux/slab.h>
31#include <linux/time.h>
32#include <linux/vmalloc.h>
33#include <linux/moduleparam.h>
34#include <linux/math64.h>
35#include <linux/string.h>
36#include <sound/core.h>
37#include <sound/minors.h>
38#include <sound/pcm.h>
39#include <sound/pcm_params.h>
40#include "pcm_plugin.h"
41#include <sound/info.h>
42#include <linux/soundcard.h>
43#include <sound/initval.h>
44#include <sound/mixer_oss.h>
45
46#define OSS_ALSAEMULVER _SIOR ('M', 249, int)
47
48static int dsp_map[SNDRV_CARDS];
49static int adsp_map[SNDRV_CARDS] = {[0 ... (SNDRV_CARDS-1)] = 1};
50static int nonblock_open = 1;
51
52MODULE_AUTHOR("Jaroslav Kysela <perex@perex.cz>, Abramo Bagnara <abramo@alsa-project.org>");
53MODULE_DESCRIPTION("PCM OSS emulation for ALSA.");
54MODULE_LICENSE("GPL");
55module_param_array(dsp_map, int, NULL, 0444);
56MODULE_PARM_DESC(dsp_map, "PCM device number assigned to 1st OSS device.");
57module_param_array(adsp_map, int, NULL, 0444);
58MODULE_PARM_DESC(adsp_map, "PCM device number assigned to 2nd OSS device.");
59module_param(nonblock_open, bool, 0644);
60MODULE_PARM_DESC(nonblock_open, "Don't block opening busy PCM devices.");
61MODULE_ALIAS_SNDRV_MINOR(SNDRV_MINOR_OSS_PCM);
62MODULE_ALIAS_SNDRV_MINOR(SNDRV_MINOR_OSS_PCM1);
63
64static int snd_pcm_oss_get_rate(struct snd_pcm_oss_file *pcm_oss_file);
65static int snd_pcm_oss_get_channels(struct snd_pcm_oss_file *pcm_oss_file);
66static int snd_pcm_oss_get_format(struct snd_pcm_oss_file *pcm_oss_file);
67
68static 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
75static 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 */
83static 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
107static 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
131static int snd_interval_refine_set(struct snd_interval *i, unsigned int val)
132{
133    struct snd_interval t;
134    t.empty = 0;
135    t.min = t.max = val;
136    t.openmin = t.openmax = 0;
137    t.integer = 1;
138    return snd_interval_refine(i, &t);
139}
140
141/**
142 * snd_pcm_hw_param_value_min
143 * @params: the hw_params instance
144 * @var: parameter to retrieve
145 * @dir: pointer to the direction (-1,0,1) or NULL
146 *
147 * Return the minimum value for field PAR.
148 */
149static unsigned int
150snd_pcm_hw_param_value_min(const struct snd_pcm_hw_params *params,
151               snd_pcm_hw_param_t var, int *dir)
152{
153    if (hw_is_mask(var)) {
154        if (dir)
155            *dir = 0;
156        return snd_mask_min(hw_param_mask_c(params, var));
157    }
158    if (hw_is_interval(var)) {
159        const struct snd_interval *i = hw_param_interval_c(params, var);
160        if (dir)
161            *dir = i->openmin;
162        return snd_interval_min(i);
163    }
164    return -EINVAL;
165}
166
167/**
168 * snd_pcm_hw_param_value_max
169 * @params: the hw_params instance
170 * @var: parameter to retrieve
171 * @dir: pointer to the direction (-1,0,1) or NULL
172 *
173 * Return the maximum value for field PAR.
174 */
175static unsigned int
176snd_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
193static 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
206static 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
222static int _snd_pcm_hw_param_min(struct snd_pcm_hw_params *params,
223                 snd_pcm_hw_param_t var, unsigned int val,
224                 int dir)
225{
226    int changed;
227    int open = 0;
228    if (dir) {
229        if (dir > 0) {
230            open = 1;
231        } else if (dir < 0) {
232            if (val > 0) {
233                open = 1;
234                val--;
235            }
236        }
237    }
238    if (hw_is_mask(var))
239        changed = snd_mask_refine_min(hw_param_mask(params, var),
240                          val + !!open);
241    else if (hw_is_interval(var))
242        changed = snd_interval_refine_min(hw_param_interval(params, var),
243                          val, open);
244    else
245        return -EINVAL;
246    if (changed) {
247        params->cmask |= 1 << var;
248        params->rmask |= 1 << var;
249    }
250    return changed;
251}
252
253/**
254 * snd_pcm_hw_param_min
255 * @pcm: PCM instance
256 * @params: the hw_params instance
257 * @var: parameter to retrieve
258 * @val: minimal value
259 * @dir: pointer to the direction (-1,0,1) or NULL
260 *
261 * Inside configuration space defined by PARAMS remove from PAR all
262 * values < VAL. Reduce configuration space accordingly.
263 * Return new minimum or -EINVAL if the configuration space is empty
264 */
265static 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
281static int _snd_pcm_hw_param_max(struct snd_pcm_hw_params *params,
282                 snd_pcm_hw_param_t var, unsigned int val,
283                 int dir)
284{
285    int changed;
286    int open = 0;
287    if (dir) {
288        if (dir < 0) {
289            open = 1;
290        } else if (dir > 0) {
291            open = 1;
292            val++;
293        }
294    }
295    if (hw_is_mask(var)) {
296        if (val == 0 && open) {
297            snd_mask_none(hw_param_mask(params, var));
298            changed = -EINVAL;
299        } else
300            changed = snd_mask_refine_max(hw_param_mask(params, var),
301                              val - !!open);
302    } else if (hw_is_interval(var))
303        changed = snd_interval_refine_max(hw_param_interval(params, var),
304                          val, open);
305    else
306        return -EINVAL;
307    if (changed) {
308        params->cmask |= 1 << var;
309        params->rmask |= 1 << var;
310    }
311    return changed;
312}
313
314/**
315 * snd_pcm_hw_param_max
316 * @pcm: PCM instance
317 * @params: the hw_params instance
318 * @var: parameter to retrieve
319 * @val: maximal value
320 * @dir: pointer to the direction (-1,0,1) or NULL
321 *
322 * Inside configuration space defined by PARAMS remove from PAR all
323 * values >= VAL + 1. Reduce configuration space accordingly.
324 * Return new maximum or -EINVAL if the configuration space is empty
325 */
326static 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
342static 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
358static 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 */
375static int boundary_nearer(int min, int mindir,
376               int best, int bestdir,
377               int max, int maxdir)
378{
379    int dmin, dmindir;
380    int dmax, dmaxdir;
381    boundary_sub(best, bestdir, min, mindir, &dmin, &dmindir);
382    boundary_sub(max, maxdir, best, bestdir, &dmax, &dmaxdir);
383    return boundary_lt(dmin, dmindir, dmax, dmaxdir);
384}
385
386/**
387 * snd_pcm_hw_param_near
388 * @pcm: PCM instance
389 * @params: the hw_params instance
390 * @var: parameter to retrieve
391 * @best: value to set
392 * @dir: pointer to the direction (-1,0,1) or NULL
393 *
394 * Inside configuration space defined by PARAMS set PAR to the available value
395 * nearest to VAL. Reduce configuration space accordingly.
396 * This function cannot be called for SNDRV_PCM_HW_PARAM_ACCESS,
397 * SNDRV_PCM_HW_PARAM_FORMAT, SNDRV_PCM_HW_PARAM_SUBFORMAT.
398 * Return the value found.
399  */
400static 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
472static int _snd_pcm_hw_param_set(struct snd_pcm_hw_params *params,
473                 snd_pcm_hw_param_t var, unsigned int val,
474                 int dir)
475{
476    int changed;
477    if (hw_is_mask(var)) {
478        struct snd_mask *m = hw_param_mask(params, var);
479        if (val == 0 && dir < 0) {
480            changed = -EINVAL;
481            snd_mask_none(m);
482        } else {
483            if (dir > 0)
484                val++;
485            else if (dir < 0)
486                val--;
487            changed = snd_mask_refine_set(hw_param_mask(params, var), val);
488        }
489    } else if (hw_is_interval(var)) {
490        struct snd_interval *i = hw_param_interval(params, var);
491        if (val == 0 && dir < 0) {
492            changed = -EINVAL;
493            snd_interval_none(i);
494        } else if (dir == 0)
495            changed = snd_interval_refine_set(i, val);
496        else {
497            struct snd_interval t;
498            t.openmin = 1;
499            t.openmax = 1;
500            t.empty = 0;
501            t.integer = 0;
502            if (dir < 0) {
503                t.min = val - 1;
504                t.max = val;
505            } else {
506                t.min = val;
507                t.max = val+1;
508            }
509            changed = snd_interval_refine(i, &t);
510        }
511    } else
512        return -EINVAL;
513    if (changed) {
514        params->cmask |= 1 << var;
515        params->rmask |= 1 << var;
516    }
517    return changed;
518}
519
520/**
521 * snd_pcm_hw_param_set
522 * @pcm: PCM instance
523 * @params: the hw_params instance
524 * @var: parameter to retrieve
525 * @val: value to set
526 * @dir: pointer to the direction (-1,0,1) or NULL
527 *
528 * Inside configuration space defined by PARAMS remove from PAR all
529 * values != VAL. Reduce configuration space accordingly.
530 * Return VAL or -EINVAL if the configuration space is empty
531 */
532static 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
548static 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
565static 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
580static 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
595int 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
611static 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
628static 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
637static inline
638snd_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
659static 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
683static 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
707static 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
797static 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
837static 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;
1074failure:
1075    kfree(sw_params);
1076    kfree(params);
1077    kfree(sparams);
1078    mutex_unlock(&runtime->oss.params_lock);
1079    return err;
1080}
1081
1082static 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
1106static 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
1124static 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
1145static 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
1170snd_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
1207snd_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
1256snd_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    
1294snd_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
1331static 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
1364static 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
1431static 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
1464static 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
1516static 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
1536static 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
1552static 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
1599static 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
1703static 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
1725static 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
1735static 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
1756static 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
1766static 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
1776static 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
1819static 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
1844static 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
1854static 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
1877static 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
1891static 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
1910static 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
1924static 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
1932static 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
1956static 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
1969static 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
1979static 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
2048static 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
2062static 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
2085static 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
2154static 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
2215static 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
2222static 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
2232static 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
2252static 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
2264static 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
2298static 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
2312static 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
2370static 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
2382static int snd_pcm_oss_open(struct inode *inode, struct file *file)
2383{
2384    int err;
2385    char task_name[32];
2386    struct snd_pcm *pcm;
2387    struct snd_pcm_oss_file *pcm_oss_file;
2388    struct snd_pcm_oss_setup setup[2];
2389    int nonblock;
2390    wait_queue_t wait;
2391
2392    err = nonseekable_open(inode, file);
2393    if (err < 0)
2394        return err;
2395
2396    pcm = snd_lookup_oss_minor_data(iminor(inode),
2397                    SNDRV_OSS_DEVICE_TYPE_PCM);
2398    if (pcm == NULL) {
2399        err = -ENODEV;
2400        goto __error1;
2401    }
2402    err = snd_card_file_add(pcm->card, file);
2403    if (err < 0)
2404        goto __error1;
2405    if (!try_module_get(pcm->card->module)) {
2406        err = -EFAULT;
2407        goto __error2;
2408    }
2409    if (snd_task_name(current, task_name, sizeof(task_name)) < 0) {
2410        err = -EFAULT;
2411        goto __error;
2412    }
2413    memset(setup, 0, sizeof(setup));
2414    if (file->f_mode & FMODE_WRITE)
2415        snd_pcm_oss_look_for_setup(pcm, SNDRV_PCM_STREAM_PLAYBACK,
2416                       task_name, &setup[0]);
2417    if (file->f_mode & FMODE_READ)
2418        snd_pcm_oss_look_for_setup(pcm, SNDRV_PCM_STREAM_CAPTURE,
2419                       task_name, &setup[1]);
2420
2421    nonblock = !!(file->f_flags & O_NONBLOCK);
2422    if (!nonblock)
2423        nonblock = nonblock_open;
2424
2425    init_waitqueue_entry(&wait, current);
2426    add_wait_queue(&pcm->open_wait, &wait);
2427    mutex_lock(&pcm->open_mutex);
2428    while (1) {
2429        err = snd_pcm_oss_open_file(file, pcm, &pcm_oss_file,
2430                        iminor(inode), setup);
2431        if (err >= 0)
2432            break;
2433        if (err == -EAGAIN) {
2434            if (nonblock) {
2435                err = -EBUSY;
2436                break;
2437            }
2438        } else
2439            break;
2440        set_current_state(TASK_INTERRUPTIBLE);
2441        mutex_unlock(&pcm->open_mutex);
2442        schedule();
2443        mutex_lock(&pcm->open_mutex);
2444        if (signal_pending(current)) {
2445            err = -ERESTARTSYS;
2446            break;
2447        }
2448    }
2449    remove_wait_queue(&pcm->open_wait, &wait);
2450    mutex_unlock(&pcm->open_mutex);
2451    if (err < 0)
2452        goto __error;
2453    return err;
2454
2455      __error:
2456         module_put(pcm->card->module);
2457      __error2:
2458          snd_card_file_remove(pcm->card, file);
2459      __error1:
2460    return err;
2461}
2462
2463static int snd_pcm_oss_release(struct inode *inode, struct file *file)
2464{
2465    struct snd_pcm *pcm;
2466    struct snd_pcm_substream *substream;
2467    struct snd_pcm_oss_file *pcm_oss_file;
2468
2469    pcm_oss_file = file->private_data;
2470    substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
2471    if (substream == NULL)
2472        substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
2473    if (snd_BUG_ON(!substream))
2474        return -ENXIO;
2475    pcm = substream->pcm;
2476    if (!pcm->card->shutdown)
2477        snd_pcm_oss_sync(pcm_oss_file);
2478    mutex_lock(&pcm->open_mutex);
2479    snd_pcm_oss_release_file(pcm_oss_file);
2480    mutex_unlock(&pcm->open_mutex);
2481    wake_up(&pcm->open_wait);
2482    module_put(pcm->card->module);
2483    snd_card_file_remove(pcm->card, file);
2484    return 0;
2485}
2486
2487static long snd_pcm_oss_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
2488{
2489    struct snd_pcm_oss_file *pcm_oss_file;
2490    int __user *p = (int __user *)arg;
2491    int res;
2492
2493    pcm_oss_file = file->private_data;
2494    if (cmd == OSS_GETVERSION)
2495        return put_user(SNDRV_OSS_VERSION, p);
2496    if (cmd == OSS_ALSAEMULVER)
2497        return put_user(1, p);
2498#if defined(CONFIG_SND_MIXER_OSS) || (defined(MODULE) && defined(CONFIG_SND_MIXER_OSS_MODULE))
2499    if (((cmd >> 8) & 0xff) == 'M') { /* mixer ioctl - for OSS compatibility */
2500        struct snd_pcm_substream *substream;
2501        int idx;
2502        for (idx = 0; idx < 2; ++idx) {
2503            substream = pcm_oss_file->streams[idx];
2504            if (substream != NULL)
2505                break;
2506        }
2507        if (snd_BUG_ON(idx >= 2))
2508            return -ENXIO;
2509        return snd_mixer_oss_ioctl_card(substream->pcm->card, cmd, arg);
2510    }
2511#endif
2512    if (((cmd >> 8) & 0xff) != 'P')
2513        return -EINVAL;
2514#ifdef OSS_DEBUG
2515    printk(KERN_DEBUG "pcm_oss: ioctl = 0x%x\n", cmd);
2516#endif
2517    switch (cmd) {
2518    case SNDCTL_DSP_RESET:
2519        return snd_pcm_oss_reset(pcm_oss_file);
2520    case SNDCTL_DSP_SYNC:
2521        return snd_pcm_oss_sync(pcm_oss_file);
2522    case SNDCTL_DSP_SPEED:
2523        if (get_user(res, p))
2524            return -EFAULT;
2525        if ((res = snd_pcm_oss_set_rate(pcm_oss_file, res))<0)
2526            return res;
2527        return put_user(res, p);
2528    case SOUND_PCM_READ_RATE:
2529        res = snd_pcm_oss_get_rate(pcm_oss_file);
2530        if (res < 0)
2531            return res;
2532        return put_user(res, p);
2533    case SNDCTL_DSP_STEREO:
2534        if (get_user(res, p))
2535            return -EFAULT;
2536        res = res > 0 ? 2 : 1;
2537        if ((res = snd_pcm_oss_set_channels(pcm_oss_file, res)) < 0)
2538            return res;
2539        return put_user(--res, p);
2540    case SNDCTL_DSP_GETBLKSIZE:
2541        res = snd_pcm_oss_get_block_size(pcm_oss_file);
2542        if (res < 0)
2543            return res;
2544        return put_user(res, p);
2545    case SNDCTL_DSP_SETFMT:
2546        if (get_user(res, p))
2547            return -EFAULT;
2548        res = snd_pcm_oss_set_format(pcm_oss_file, res);
2549        if (res < 0)
2550            return res;
2551        return put_user(res, p);
2552    case SOUND_PCM_READ_BITS:
2553        res = snd_pcm_oss_get_format(pcm_oss_file);
2554        if (res < 0)
2555            return res;
2556        return put_user(res, p);
2557    case SNDCTL_DSP_CHANNELS:
2558        if (get_user(res, p))
2559            return -EFAULT;
2560        res = snd_pcm_oss_set_channels(pcm_oss_file, res);
2561        if (res < 0)
2562            return res;
2563        return put_user(res, p);
2564    case SOUND_PCM_READ_CHANNELS:
2565        res = snd_pcm_oss_get_channels(pcm_oss_file);
2566        if (res < 0)
2567            return res;
2568        return put_user(res, p);
2569    case SOUND_PCM_WRITE_FILTER:
2570    case SOUND_PCM_READ_FILTER:
2571        return -EIO;
2572    case SNDCTL_DSP_POST:
2573        return snd_pcm_oss_post(pcm_oss_file);
2574    case SNDCTL_DSP_SUBDIVIDE:
2575        if (get_user(res, p))
2576            return -EFAULT;
2577        res = snd_pcm_oss_set_subdivide(pcm_oss_file, res);
2578        if (res < 0)
2579            return res;
2580        return put_user(res, p);
2581    case SNDCTL_DSP_SETFRAGMENT:
2582        if (get_user(res, p))
2583            return -EFAULT;
2584        return snd_pcm_oss_set_fragment(pcm_oss_file, res);
2585    case SNDCTL_DSP_GETFMTS:
2586        res = snd_pcm_oss_get_formats(pcm_oss_file);
2587        if (res < 0)
2588            return res;
2589        return put_user(res, p);
2590    case SNDCTL_DSP_GETOSPACE:
2591    case SNDCTL_DSP_GETISPACE:
2592        return snd_pcm_oss_get_space(pcm_oss_file,
2593            cmd == SNDCTL_DSP_GETISPACE ?
2594                SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK,
2595            (struct audio_buf_info __user *) arg);
2596    case SNDCTL_DSP_NONBLOCK:
2597        return snd_pcm_oss_nonblock(file);
2598    case SNDCTL_DSP_GETCAPS:
2599        res = snd_pcm_oss_get_caps(pcm_oss_file);
2600        if (res < 0)
2601            return res;
2602        return put_user(res, p);
2603    case SNDCTL_DSP_GETTRIGGER:
2604        res = snd_pcm_oss_get_trigger(pcm_oss_file);
2605        if (res < 0)
2606            return res;
2607        return put_user(res, p);
2608    case SNDCTL_DSP_SETTRIGGER:
2609        if (get_user(res, p))
2610            return -EFAULT;
2611        return snd_pcm_oss_set_trigger(pcm_oss_file, res);
2612    case SNDCTL_DSP_GETIPTR:
2613    case SNDCTL_DSP_GETOPTR:
2614        return snd_pcm_oss_get_ptr(pcm_oss_file,
2615            cmd == SNDCTL_DSP_GETIPTR ?
2616                SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK,
2617            (struct count_info __user *) arg);
2618    case SNDCTL_DSP_MAPINBUF:
2619    case SNDCTL_DSP_MAPOUTBUF:
2620        return snd_pcm_oss_get_mapbuf(pcm_oss_file,
2621            cmd == SNDCTL_DSP_MAPINBUF ?
2622                SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK,
2623            (struct buffmem_desc __user *) arg);
2624    case SNDCTL_DSP_SETSYNCRO:
2625        /* stop DMA now.. */
2626        return 0;
2627    case SNDCTL_DSP_SETDUPLEX:
2628        if (snd_pcm_oss_get_caps(pcm_oss_file) & DSP_CAP_DUPLEX)
2629            return 0;
2630        return -EIO;
2631    case SNDCTL_DSP_GETODELAY:
2632        res = snd_pcm_oss_get_odelay(pcm_oss_file);
2633        if (res < 0) {
2634            /* it's for sure, some broken apps don't check for error codes */
2635            put_user(0, p);
2636            return res;
2637        }
2638        return put_user(res, p);
2639    case SNDCTL_DSP_PROFILE:
2640        return 0; /* silently ignore */
2641    default:
2642        snd_printd("pcm_oss: unknown command = 0x%x\n", cmd);
2643    }
2644    return -EINVAL;
2645}
2646
2647#ifdef CONFIG_COMPAT
2648/* all compatible */
2649#define snd_pcm_oss_ioctl_compat snd_pcm_oss_ioctl
2650#else
2651#define snd_pcm_oss_ioctl_compat NULL
2652#endif
2653
2654static ssize_t snd_pcm_oss_read(struct file *file, char __user *buf, size_t count, loff_t *offset)
2655{
2656    struct snd_pcm_oss_file *pcm_oss_file;
2657    struct snd_pcm_substream *substream;
2658
2659    pcm_oss_file = file->private_data;
2660    substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
2661    if (substream == NULL)
2662        return -ENXIO;
2663    substream->f_flags = file->f_flags & O_NONBLOCK;
2664#ifndef OSS_DEBUG
2665    return snd_pcm_oss_read1(substream, buf, count);
2666#else
2667    {
2668        ssize_t res = snd_pcm_oss_read1(substream, buf, count);
2669        printk(KERN_DEBUG "pcm_oss: read %li bytes "
2670               "(returned %li bytes)\n", (long)count, (long)res);
2671        return res;
2672    }
2673#endif
2674}
2675
2676static ssize_t snd_pcm_oss_write(struct file *file, const char __user *buf, size_t count, loff_t *offset)
2677{
2678    struct snd_pcm_oss_file *pcm_oss_file;
2679    struct snd_pcm_substream *substream;
2680    long result;
2681
2682    pcm_oss_file = file->private_data;
2683    substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
2684    if (substream == NULL)
2685        return -ENXIO;
2686    substream->f_flags = file->f_flags & O_NONBLOCK;
2687    result = snd_pcm_oss_write1(substream, buf, count);
2688#ifdef OSS_DEBUG
2689    printk(KERN_DEBUG "pcm_oss: write %li bytes (wrote %li bytes)\n",
2690           (long)count, (long)result);
2691#endif
2692    return result;
2693}
2694
2695static int snd_pcm_oss_playback_ready(struct snd_pcm_substream *substream)
2696{
2697    struct snd_pcm_runtime *runtime = substream->runtime;
2698    if (atomic_read(&substream->mmap_count))
2699        return runtime->oss.prev_hw_ptr_period !=
2700                        get_hw_ptr_period(runtime);
2701    else
2702        return snd_pcm_playback_avail(runtime) >=
2703                        runtime->oss.period_frames;
2704}
2705
2706static int snd_pcm_oss_capture_ready(struct snd_pcm_substream *substream)
2707{
2708    struct snd_pcm_runtime *runtime = substream->runtime;
2709    if (atomic_read(&substream->mmap_count))
2710        return runtime->oss.prev_hw_ptr_period !=
2711                        get_hw_ptr_period(runtime);
2712    else
2713        return snd_pcm_capture_avail(runtime) >=
2714                        runtime->oss.period_frames;
2715}
2716
2717static unsigned int snd_pcm_oss_poll(struct file *file, poll_table * wait)
2718{
2719    struct snd_pcm_oss_file *pcm_oss_file;
2720    unsigned int mask;
2721    struct snd_pcm_substream *psubstream = NULL, *csubstream = NULL;
2722    
2723    pcm_oss_file = file->private_data;
2724
2725    psubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
2726    csubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
2727
2728    mask = 0;
2729    if (psubstream != NULL) {
2730        struct snd_pcm_runtime *runtime = psubstream->runtime;
2731        poll_wait(file, &runtime->sleep, wait);
2732        snd_pcm_stream_lock_irq(psubstream);
2733        if (runtime->status->state != SNDRV_PCM_STATE_DRAINING &&
2734            (runtime->status->state != SNDRV_PCM_STATE_RUNNING ||
2735             snd_pcm_oss_playback_ready(psubstream)))
2736            mask |= POLLOUT | POLLWRNORM;
2737        snd_pcm_stream_unlock_irq(psubstream);
2738    }
2739    if (csubstream != NULL) {
2740        struct snd_pcm_runtime *runtime = csubstream->runtime;
2741        snd_pcm_state_t ostate;
2742        poll_wait(file, &runtime->sleep, wait);
2743        snd_pcm_stream_lock_irq(csubstream);
2744        if ((ostate = runtime->status->state) != SNDRV_PCM_STATE_RUNNING ||
2745            snd_pcm_oss_capture_ready(csubstream))
2746            mask |= POLLIN | POLLRDNORM;
2747        snd_pcm_stream_unlock_irq(csubstream);
2748        if (ostate != SNDRV_PCM_STATE_RUNNING && runtime->oss.trigger) {
2749            struct snd_pcm_oss_file ofile;
2750            memset(&ofile, 0, sizeof(ofile));
2751            ofile.streams[SNDRV_PCM_STREAM_CAPTURE] = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
2752            runtime->oss.trigger = 0;
2753            snd_pcm_oss_set_trigger(&ofile, PCM_ENABLE_INPUT);
2754        }
2755    }
2756
2757    return mask;
2758}
2759
2760static int snd_pcm_oss_mmap(struct file *file, struct vm_area_struct *area)
2761{
2762    struct snd_pcm_oss_file *pcm_oss_file;
2763    struct snd_pcm_substream *substream = NULL;
2764    struct snd_pcm_runtime *runtime;
2765    int err;
2766
2767#ifdef OSS_DEBUG
2768    printk(KERN_DEBUG "pcm_oss: mmap begin\n");
2769#endif
2770    pcm_oss_file = file->private_data;
2771    switch ((area->vm_flags & (VM_READ | VM_WRITE))) {
2772    case VM_READ | VM_WRITE:
2773        substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
2774        if (substream)
2775            break;
2776        /* Fall through */
2777    case VM_READ:
2778        substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
2779        break;
2780    case VM_WRITE:
2781        substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
2782        break;
2783    default:
2784        return -EINVAL;
2785    }
2786    /* set VM_READ access as well to fix memset() routines that do
2787       reads before writes (to improve performance) */
2788    area->vm_flags |= VM_READ;
2789    if (substream == NULL)
2790        return -ENXIO;
2791    runtime = substream->runtime;
2792    if (!(runtime->info & SNDRV_PCM_INFO_MMAP_VALID))
2793        return -EIO;
2794    if (runtime->info & SNDRV_PCM_INFO_INTERLEAVED)
2795        runtime->access = SNDRV_PCM_ACCESS_MMAP_INTERLEAVED;
2796    else
2797        return -EIO;
2798    
2799    if (runtime->oss.params) {
2800        if ((err = snd_pcm_oss_change_params(substream)) < 0)
2801            return err;
2802    }
2803#ifdef CONFIG_SND_PCM_OSS_PLUGINS
2804    if (runtime->oss.plugin_first != NULL)
2805        return -EIO;
2806#endif
2807
2808    if (area->vm_pgoff != 0)
2809        return -EINVAL;
2810
2811    err = snd_pcm_mmap_data(substream, file, area);
2812    if (err < 0)
2813        return err;
2814    runtime->oss.mmap_bytes = area->vm_end - area->vm_start;
2815    runtime->silence_threshold = 0;
2816    runtime->silence_size = 0;
2817#ifdef OSS_DEBUG
2818    printk(KERN_DEBUG "pcm_oss: mmap ok, bytes = 0x%x\n",
2819           runtime->oss.mmap_bytes);
2820#endif
2821    /* In mmap mode we never stop */
2822    runtime->stop_threshold = runtime->boundary;
2823
2824    return 0;
2825}
2826
2827#ifdef CONFIG_SND_VERBOSE_PROCFS
2828/*
2829 * /proc interface
2830 */
2831
2832static void snd_pcm_oss_proc_read(struct snd_info_entry *entry,
2833                  struct snd_info_buffer *buffer)
2834{
2835    struct snd_pcm_str *pstr = entry->private_data;
2836    struct snd_pcm_oss_setup *setup = pstr->oss.setup_list;
2837    mutex_lock(&pstr->oss.setup_mutex);
2838    while (setup) {
2839        snd_iprintf(buffer, "%s %u %u%s%s%s%s%s%s\n",
2840                setup->task_name,
2841                setup->periods,
2842                setup->period_size,
2843                setup->disable ? " disable" : "",
2844                setup->direct ? " direct" : "",
2845                setup->block ? " block" : "",
2846                setup->nonblock ? " non-block" : "",
2847                setup->partialfrag ? " partial-frag" : "",
2848                setup->nosilence ? " no-silence" : "");
2849        setup = setup->next;
2850    }
2851    mutex_unlock(&pstr->oss.setup_mutex);
2852}
2853
2854static void snd_pcm_oss_proc_free_setup_list(struct snd_pcm_str * pstr)
2855{
2856    struct snd_pcm_oss_setup *setup, *setupn;
2857
2858    for (setup = pstr->oss.setup_list, pstr->oss.setup_list = NULL;
2859         setup; setup = setupn) {
2860        setupn = setup->next;
2861        kfree(setup->task_name);
2862        kfree(setup);
2863    }
2864    pstr->oss.setup_list = NULL;
2865}
2866
2867static void snd_pcm_oss_proc_write(struct snd_info_entry *entry,
2868                   struct snd_info_buffer *buffer)
2869{
2870    struct snd_pcm_str *pstr = entry->private_data;
2871    char line[128], str[32], task_name[32];
2872    const char *ptr;
2873    int idx1;
2874    struct snd_pcm_oss_setup *setup, *setup1, template;
2875
2876    while (!snd_info_get_line(buffer, line, sizeof(line))) {
2877        mutex_lock(&pstr->oss.setup_mutex);
2878        memset(&template, 0, sizeof(template));
2879        ptr = snd_info_get_str(task_name, line, sizeof(task_name));
2880        if (!strcmp(task_name, "clear") || !strcmp(task_name, "erase")) {
2881            snd_pcm_oss_proc_free_setup_list(pstr);
2882            mutex_unlock(&pstr->oss.setup_mutex);
2883            continue;
2884        }
2885        for (setup = pstr->oss.setup_list; setup; setup = setup->next) {
2886            if (!strcmp(setup->task_name, task_name)) {
2887                template = *setup;
2888                break;
2889            }
2890        }
2891        ptr = snd_info_get_str(str, ptr, sizeof(str));
2892        template.periods = simple_strtoul(str, NULL, 10);
2893        ptr = snd_info_get_str(str, ptr, sizeof(str));
2894        template.period_size = simple_strtoul(str, NULL, 10);
2895        for (idx1 = 31; idx1 >= 0; idx1--)
2896            if (template.period_size & (1 << idx1))
2897                break;
2898        for (idx1--; idx1 >= 0; idx1--)
2899            template.period_size &= ~(1 << idx1);
2900        do {
2901            ptr = snd_info_get_str(str, ptr, sizeof(str));
2902            if (!strcmp(str, "disable")) {
2903                template.disable = 1;
2904            } else if (!strcmp(str, "direct")) {
2905                template.direct = 1;
2906            } else if (!strcmp(str, "block")) {
2907                template.block = 1;
2908            } else if (!strcmp(str, "non-block")) {
2909                template.nonblock = 1;
2910            } else if (!strcmp(str, "partial-frag")) {
2911                template.partialfrag = 1;
2912            } else if (!strcmp(str, "no-silence")) {
2913                template.nosilence = 1;
2914            } else if (!strcmp(str, "buggy-ptr")) {
2915                template.buggyptr = 1;
2916            }
2917        } while (*str);
2918        if (setup == NULL) {
2919            setup = kmalloc(sizeof(*setup), GFP_KERNEL);
2920            if (! setup) {
2921                buffer->error = -ENOMEM;
2922                mutex_unlock(&pstr->oss.setup_mutex);
2923                return;
2924            }
2925            if (pstr->oss.setup_list == NULL)
2926                pstr->oss.setup_list = setup;
2927            else {
2928                for (setup1 = pstr->oss.setup_list;
2929                     setup1->next; setup1 = setup1->next);
2930                setup1->next = setup;
2931            }
2932            template.task_name = kstrdup(task_name, GFP_KERNEL);
2933            if (! template.task_name) {
2934                kfree(setup);
2935                buffer->error = -ENOMEM;
2936                mutex_unlock(&pstr->oss.setup_mutex);
2937                return;
2938            }
2939        }
2940        *setup = template;
2941        mutex_unlock(&pstr->oss.setup_mutex);
2942    }
2943}
2944
2945static void snd_pcm_oss_proc_init(struct snd_pcm *pcm)
2946{
2947    int stream;
2948    for (stream = 0; stream < 2; ++stream) {
2949        struct snd_info_entry *entry;
2950        struct snd_pcm_str *pstr = &pcm->streams[stream];
2951        if (pstr->substream_count == 0)
2952            continue;
2953        if ((entry = snd_info_create_card_entry(pcm->card, "oss", pstr->proc_root)) != NULL) {
2954            entry->content = SNDRV_INFO_CONTENT_TEXT;
2955            entry->mode = S_IFREG | S_IRUGO | S_IWUSR;
2956            entry->c.text.read = snd_pcm_oss_proc_read;
2957            entry->c.text.write = snd_pcm_oss_proc_write;
2958            entry->private_data = pstr;
2959            if (snd_info_register(entry) < 0) {
2960                snd_info_free_entry(entry);
2961                entry = NULL;
2962            }
2963        }
2964        pstr->oss.proc_entry = entry;
2965    }
2966}
2967
2968static void snd_pcm_oss_proc_done(struct snd_pcm *pcm)
2969{
2970    int stream;
2971    for (stream = 0; stream < 2; ++stream) {
2972        struct snd_pcm_str *pstr = &pcm->streams[stream];
2973        snd_info_free_entry(pstr->oss.proc_entry);
2974        pstr->oss.proc_entry = NULL;
2975        snd_pcm_oss_proc_free_setup_list(pstr);
2976    }
2977}
2978#else /* !CONFIG_SND_VERBOSE_PROCFS */
2979#define snd_pcm_oss_proc_init(pcm)
2980#define snd_pcm_oss_proc_done(pcm)
2981#endif /* CONFIG_SND_VERBOSE_PROCFS */
2982
2983/*
2984 * ENTRY functions
2985 */
2986
2987static const struct file_operations snd_pcm_oss_f_reg =
2988{
2989    .owner = THIS_MODULE,
2990    .read = snd_pcm_oss_read,
2991    .write = snd_pcm_oss_write,
2992    .open = snd_pcm_oss_open,
2993    .release = snd_pcm_oss_release,
2994    .llseek = no_llseek,
2995    .poll = snd_pcm_oss_poll,
2996    .unlocked_ioctl = snd_pcm_oss_ioctl,
2997    .compat_ioctl = snd_pcm_oss_ioctl_compat,
2998    .mmap = snd_pcm_oss_mmap,
2999};
3000
3001static void register_oss_dsp(struct snd_pcm *pcm, int index)
3002{
3003    char name[128];
3004    sprintf(name, "dsp%i%i", pcm->card->number, pcm->device);
3005    if (snd_register_oss_device(SNDRV_OSS_DEVICE_TYPE_PCM,
3006                    pcm->card, index, &snd_pcm_oss_f_reg,
3007                    pcm, name) < 0) {
3008        snd_printk(KERN_ERR "unable to register OSS PCM device %i:%i\n",
3009               pcm->card->number, pcm->device);
3010    }
3011}
3012
3013static int snd_pcm_oss_register_minor(struct snd_pcm *pcm)
3014{
3015    pcm->oss.reg = 0;
3016    if (dsp_map[pcm->card->number] == (int)pcm->device) {
3017        char name[128];
3018        int duplex;
3019        register_oss_dsp(pcm, 0);
3020        duplex = (pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream_count > 0 &&
3021                  pcm->streams[SNDRV_PCM_STREAM_CAPTURE].substream_count &&
3022                  !(pcm->info_flags & SNDRV_PCM_INFO_HALF_DUPLEX));
3023        sprintf(name, "%s%s", pcm->name, duplex ? " (DUPLEX)" : "");
3024#ifdef SNDRV_OSS_INFO_DEV_AUDIO
3025        snd_oss_info_register(SNDRV_OSS_INFO_DEV_AUDIO,
3026                      pcm->card->number,
3027                      name);
3028#endif
3029        pcm->oss.reg++;
3030        pcm->oss.reg_mask |= 1;
3031    }
3032    if (adsp_map[pcm->card->number] == (int)pcm->device) {
3033        register_oss_dsp(pcm, 1);
3034        pcm->oss.reg++;
3035        pcm->oss.reg_mask |= 2;
3036    }
3037
3038    if (pcm->oss.reg)
3039        snd_pcm_oss_proc_init(pcm);
3040
3041    return 0;
3042}
3043
3044static int snd_pcm_oss_disconnect_minor(struct snd_pcm *pcm)
3045{
3046    if (pcm->oss.reg) {
3047        if (pcm->oss.reg_mask & 1) {
3048            pcm->oss.reg_mask &= ~1;
3049            snd_unregister_oss_device(SNDRV_OSS_DEVICE_TYPE_PCM,
3050                          pcm->card, 0);
3051        }
3052        if (pcm->oss.reg_mask & 2) {
3053            pcm->oss.reg_mask &= ~2;
3054            snd_unregister_oss_device(SNDRV_OSS_DEVICE_TYPE_PCM,
3055                          pcm->card, 1);
3056        }
3057        if (dsp_map[pcm->card->number] == (int)pcm->device) {
3058#ifdef SNDRV_OSS_INFO_DEV_AUDIO
3059            snd_oss_info_unregister(SNDRV_OSS_INFO_DEV_AUDIO, pcm->card->number);
3060#endif
3061        }
3062        pcm->oss.reg = 0;
3063    }
3064    return 0;
3065}
3066
3067static int snd_pcm_oss_unregister_minor(struct snd_pcm *pcm)
3068{
3069    snd_pcm_oss_disconnect_minor(pcm);
3070    snd_pcm_oss_proc_done(pcm);
3071    return 0;
3072}
3073
3074static struct snd_pcm_notify snd_pcm_oss_notify =
3075{
3076    .n_register = snd_pcm_oss_register_minor,
3077    .n_disconnect = snd_pcm_oss_disconnect_minor,
3078    .n_unregister = snd_pcm_oss_unregister_minor,
3079};
3080
3081static int __init alsa_pcm_oss_init(void)
3082{
3083    int i;
3084    int err;
3085
3086    /* check device map table */
3087    for (i = 0; i < SNDRV_CARDS; i++) {
3088        if (dsp_map[i] < 0 || dsp_map[i] >= SNDRV_PCM_DEVICES) {
3089            snd_printk(KERN_ERR "invalid dsp_map[%d] = %d\n",
3090                   i, dsp_map[i]);
3091            dsp_map[i] = 0;
3092        }
3093        if (adsp_map[i] < 0 || adsp_map[i] >= SNDRV_PCM_DEVICES) {
3094            snd_printk(KERN_ERR "invalid adsp_map[%d] = %d\n",
3095                   i, adsp_map[i]);
3096            adsp_map[i] = 1;
3097        }
3098    }
3099    if ((err = snd_pcm_notify(&snd_pcm_oss_notify, 0)) < 0)
3100        return err;
3101    return 0;
3102}
3103
3104static void __exit alsa_pcm_oss_exit(void)
3105{
3106    snd_pcm_notify(&snd_pcm_oss_notify, 1);
3107}
3108
3109module_init(alsa_pcm_oss_init)
3110module_exit(alsa_pcm_oss_exit)
3111

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