2 * Digital Audio (PCM) abstract layer / OSS compatible
3 * Copyright (c) by Jaroslav Kysela <perex@perex.cz>
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.
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.
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
29 #include <linux/init.h>
30 #include <linux/slab.h>
31 #include <linux/sched/signal.h>
32 #include <linux/time.h>
33 #include <linux/vmalloc.h>
34 #include <linux/module.h>
35 #include <linux/math64.h>
36 #include <linux/string.h>
37 #include <linux/compat.h>
38 #include <sound/core.h>
39 #include <sound/minors.h>
40 #include <sound/pcm.h>
41 #include <sound/pcm_params.h>
42 #include "pcm_plugin.h"
43 #include <sound/info.h>
44 #include <linux/soundcard.h>
45 #include <sound/initval.h>
46 #include <sound/mixer_oss.h>
48 #define OSS_ALSAEMULVER _SIOR ('M', 249, int)
50 static int dsp_map[SNDRV_CARDS];
51 static int adsp_map[SNDRV_CARDS] = {[0 ... (SNDRV_CARDS-1)] = 1};
52 static bool nonblock_open = 1;
54 MODULE_AUTHOR("Jaroslav Kysela <perex@perex.cz>, Abramo Bagnara <abramo@alsa-project.org>");
55 MODULE_DESCRIPTION("PCM OSS emulation for ALSA.");
56 MODULE_LICENSE("GPL");
57 module_param_array(dsp_map, int, NULL, 0444);
58 MODULE_PARM_DESC(dsp_map, "PCM device number assigned to 1st OSS device.");
59 module_param_array(adsp_map, int, NULL, 0444);
60 MODULE_PARM_DESC(adsp_map, "PCM device number assigned to 2nd OSS device.");
61 module_param(nonblock_open, bool, 0644);
62 MODULE_PARM_DESC(nonblock_open, "Don't block opening busy PCM devices.");
63 MODULE_ALIAS_SNDRV_MINOR(SNDRV_MINOR_OSS_PCM);
64 MODULE_ALIAS_SNDRV_MINOR(SNDRV_MINOR_OSS_PCM1);
66 static int snd_pcm_oss_get_rate(struct snd_pcm_oss_file *pcm_oss_file);
67 static int snd_pcm_oss_get_channels(struct snd_pcm_oss_file *pcm_oss_file);
68 static int snd_pcm_oss_get_format(struct snd_pcm_oss_file *pcm_oss_file);
71 * helper functions to process hw_params
73 static int snd_interval_refine_min(struct snd_interval *i, unsigned int min, int openmin)
80 } else if (i->min == min && !i->openmin && openmin) {
90 if (snd_interval_checkempty(i)) {
97 static int snd_interval_refine_max(struct snd_interval *i, unsigned int max, int openmax)
102 i->openmax = openmax;
104 } else if (i->max == max && !i->openmax && openmax) {
114 if (snd_interval_checkempty(i)) {
115 snd_interval_none(i);
121 static int snd_interval_refine_set(struct snd_interval *i, unsigned int val)
123 struct snd_interval t;
126 t.openmin = t.openmax = 0;
128 return snd_interval_refine(i, &t);
132 * snd_pcm_hw_param_value_min
133 * @params: the hw_params instance
134 * @var: parameter to retrieve
135 * @dir: pointer to the direction (-1,0,1) or NULL
137 * Return the minimum value for field PAR.
140 snd_pcm_hw_param_value_min(const struct snd_pcm_hw_params *params,
141 snd_pcm_hw_param_t var, int *dir)
143 if (hw_is_mask(var)) {
146 return snd_mask_min(hw_param_mask_c(params, var));
148 if (hw_is_interval(var)) {
149 const struct snd_interval *i = hw_param_interval_c(params, var);
152 return snd_interval_min(i);
158 * snd_pcm_hw_param_value_max
159 * @params: the hw_params instance
160 * @var: parameter to retrieve
161 * @dir: pointer to the direction (-1,0,1) or NULL
163 * Return the maximum value for field PAR.
166 snd_pcm_hw_param_value_max(const struct snd_pcm_hw_params *params,
167 snd_pcm_hw_param_t var, int *dir)
169 if (hw_is_mask(var)) {
172 return snd_mask_max(hw_param_mask_c(params, var));
174 if (hw_is_interval(var)) {
175 const struct snd_interval *i = hw_param_interval_c(params, var);
177 *dir = - (int) i->openmax;
178 return snd_interval_max(i);
183 static int _snd_pcm_hw_param_mask(struct snd_pcm_hw_params *params,
184 snd_pcm_hw_param_t var,
185 const struct snd_mask *val)
188 changed = snd_mask_refine(hw_param_mask(params, var), val);
190 params->cmask |= 1 << var;
191 params->rmask |= 1 << var;
196 static int snd_pcm_hw_param_mask(struct snd_pcm_substream *pcm,
197 struct snd_pcm_hw_params *params,
198 snd_pcm_hw_param_t var,
199 const struct snd_mask *val)
201 int changed = _snd_pcm_hw_param_mask(params, var, val);
205 int err = snd_pcm_hw_refine(pcm, params);
212 static int _snd_pcm_hw_param_min(struct snd_pcm_hw_params *params,
213 snd_pcm_hw_param_t var, unsigned int val,
221 } else if (dir < 0) {
229 changed = snd_mask_refine_min(hw_param_mask(params, var),
231 else if (hw_is_interval(var))
232 changed = snd_interval_refine_min(hw_param_interval(params, var),
237 params->cmask |= 1 << var;
238 params->rmask |= 1 << var;
244 * snd_pcm_hw_param_min
246 * @params: the hw_params instance
247 * @var: parameter to retrieve
248 * @val: minimal value
249 * @dir: pointer to the direction (-1,0,1) or NULL
251 * Inside configuration space defined by PARAMS remove from PAR all
252 * values < VAL. Reduce configuration space accordingly.
253 * Return new minimum or -EINVAL if the configuration space is empty
255 static int snd_pcm_hw_param_min(struct snd_pcm_substream *pcm,
256 struct snd_pcm_hw_params *params,
257 snd_pcm_hw_param_t var, unsigned int val,
260 int changed = _snd_pcm_hw_param_min(params, var, val, dir ? *dir : 0);
264 int err = snd_pcm_hw_refine(pcm, params);
268 return snd_pcm_hw_param_value_min(params, var, dir);
271 static int _snd_pcm_hw_param_max(struct snd_pcm_hw_params *params,
272 snd_pcm_hw_param_t var, unsigned int val,
280 } else if (dir > 0) {
285 if (hw_is_mask(var)) {
286 if (val == 0 && open) {
287 snd_mask_none(hw_param_mask(params, var));
290 changed = snd_mask_refine_max(hw_param_mask(params, var),
292 } else if (hw_is_interval(var))
293 changed = snd_interval_refine_max(hw_param_interval(params, var),
298 params->cmask |= 1 << var;
299 params->rmask |= 1 << var;
305 * snd_pcm_hw_param_max
307 * @params: the hw_params instance
308 * @var: parameter to retrieve
309 * @val: maximal value
310 * @dir: pointer to the direction (-1,0,1) or NULL
312 * Inside configuration space defined by PARAMS remove from PAR all
313 * values >= VAL + 1. Reduce configuration space accordingly.
314 * Return new maximum or -EINVAL if the configuration space is empty
316 static int snd_pcm_hw_param_max(struct snd_pcm_substream *pcm,
317 struct snd_pcm_hw_params *params,
318 snd_pcm_hw_param_t var, unsigned int val,
321 int changed = _snd_pcm_hw_param_max(params, var, val, dir ? *dir : 0);
325 int err = snd_pcm_hw_refine(pcm, params);
329 return snd_pcm_hw_param_value_max(params, var, dir);
332 static int boundary_sub(int a, int adir,
336 adir = adir < 0 ? -1 : (adir > 0 ? 1 : 0);
337 bdir = bdir < 0 ? -1 : (bdir > 0 ? 1 : 0);
342 } else if (*cdir == 2) {
348 static int boundary_lt(unsigned int a, int adir,
349 unsigned int b, int bdir)
361 return a < b || (a == b && adir < bdir);
364 /* Return 1 if min is nearer to best than max */
365 static int boundary_nearer(int min, int mindir,
366 int best, int bestdir,
371 boundary_sub(best, bestdir, min, mindir, &dmin, &dmindir);
372 boundary_sub(max, maxdir, best, bestdir, &dmax, &dmaxdir);
373 return boundary_lt(dmin, dmindir, dmax, dmaxdir);
377 * snd_pcm_hw_param_near
379 * @params: the hw_params instance
380 * @var: parameter to retrieve
381 * @best: value to set
382 * @dir: pointer to the direction (-1,0,1) or NULL
384 * Inside configuration space defined by PARAMS set PAR to the available value
385 * nearest to VAL. Reduce configuration space accordingly.
386 * This function cannot be called for SNDRV_PCM_HW_PARAM_ACCESS,
387 * SNDRV_PCM_HW_PARAM_FORMAT, SNDRV_PCM_HW_PARAM_SUBFORMAT.
388 * Return the value found.
390 static int snd_pcm_hw_param_near(struct snd_pcm_substream *pcm,
391 struct snd_pcm_hw_params *params,
392 snd_pcm_hw_param_t var, unsigned int best,
395 struct snd_pcm_hw_params *save = NULL;
397 unsigned int saved_min;
401 int valdir = dir ? *dir : 0;
406 mindir = maxdir = valdir;
409 else if (maxdir == 0)
415 save = kmalloc(sizeof(*save), GFP_KERNEL);
420 min = snd_pcm_hw_param_min(pcm, params, var, min, &mindir);
422 struct snd_pcm_hw_params *params1;
425 if ((unsigned int)min == saved_min && mindir == valdir)
427 params1 = kmalloc(sizeof(*params1), GFP_KERNEL);
428 if (params1 == NULL) {
433 max = snd_pcm_hw_param_max(pcm, params1, var, max, &maxdir);
438 if (boundary_nearer(max, maxdir, best, valdir, min, mindir)) {
445 max = snd_pcm_hw_param_max(pcm, params, var, max, &maxdir);
455 v = snd_pcm_hw_param_last(pcm, params, var, dir);
457 v = snd_pcm_hw_param_first(pcm, params, var, dir);
461 static int _snd_pcm_hw_param_set(struct snd_pcm_hw_params *params,
462 snd_pcm_hw_param_t var, unsigned int val,
466 if (hw_is_mask(var)) {
467 struct snd_mask *m = hw_param_mask(params, var);
468 if (val == 0 && dir < 0) {
476 changed = snd_mask_refine_set(hw_param_mask(params, var), val);
478 } else if (hw_is_interval(var)) {
479 struct snd_interval *i = hw_param_interval(params, var);
480 if (val == 0 && dir < 0) {
482 snd_interval_none(i);
484 changed = snd_interval_refine_set(i, val);
486 struct snd_interval t;
498 changed = snd_interval_refine(i, &t);
503 params->cmask |= 1 << var;
504 params->rmask |= 1 << var;
510 * snd_pcm_hw_param_set
512 * @params: the hw_params instance
513 * @var: parameter to retrieve
515 * @dir: pointer to the direction (-1,0,1) or NULL
517 * Inside configuration space defined by PARAMS remove from PAR all
518 * values != VAL. Reduce configuration space accordingly.
519 * Return VAL or -EINVAL if the configuration space is empty
521 static int snd_pcm_hw_param_set(struct snd_pcm_substream *pcm,
522 struct snd_pcm_hw_params *params,
523 snd_pcm_hw_param_t var, unsigned int val,
526 int changed = _snd_pcm_hw_param_set(params, var, val, dir);
530 int err = snd_pcm_hw_refine(pcm, params);
534 return snd_pcm_hw_param_value(params, var, NULL);
537 static int _snd_pcm_hw_param_setinteger(struct snd_pcm_hw_params *params,
538 snd_pcm_hw_param_t var)
541 changed = snd_interval_setinteger(hw_param_interval(params, var));
543 params->cmask |= 1 << var;
544 params->rmask |= 1 << var;
553 #ifdef CONFIG_SND_PCM_OSS_PLUGINS
554 static int snd_pcm_oss_plugin_clear(struct snd_pcm_substream *substream)
556 struct snd_pcm_runtime *runtime = substream->runtime;
557 struct snd_pcm_plugin *plugin, *next;
559 plugin = runtime->oss.plugin_first;
562 snd_pcm_plugin_free(plugin);
565 runtime->oss.plugin_first = runtime->oss.plugin_last = NULL;
569 static int snd_pcm_plugin_insert(struct snd_pcm_plugin *plugin)
571 struct snd_pcm_runtime *runtime = plugin->plug->runtime;
572 plugin->next = runtime->oss.plugin_first;
574 if (runtime->oss.plugin_first) {
575 runtime->oss.plugin_first->prev = plugin;
576 runtime->oss.plugin_first = plugin;
578 runtime->oss.plugin_last =
579 runtime->oss.plugin_first = plugin;
584 int snd_pcm_plugin_append(struct snd_pcm_plugin *plugin)
586 struct snd_pcm_runtime *runtime = plugin->plug->runtime;
588 plugin->prev = runtime->oss.plugin_last;
589 if (runtime->oss.plugin_last) {
590 runtime->oss.plugin_last->next = plugin;
591 runtime->oss.plugin_last = plugin;
593 runtime->oss.plugin_last =
594 runtime->oss.plugin_first = plugin;
598 #endif /* CONFIG_SND_PCM_OSS_PLUGINS */
600 static long snd_pcm_oss_bytes(struct snd_pcm_substream *substream, long frames)
602 struct snd_pcm_runtime *runtime = substream->runtime;
603 long buffer_size = snd_pcm_lib_buffer_bytes(substream);
604 long bytes = frames_to_bytes(runtime, frames);
605 if (buffer_size == runtime->oss.buffer_bytes)
607 #if BITS_PER_LONG >= 64
608 return runtime->oss.buffer_bytes * bytes / buffer_size;
611 u64 bsize = (u64)runtime->oss.buffer_bytes * (u64)bytes;
612 return div_u64(bsize, buffer_size);
617 static long snd_pcm_alsa_frames(struct snd_pcm_substream *substream, long bytes)
619 struct snd_pcm_runtime *runtime = substream->runtime;
620 long buffer_size = snd_pcm_lib_buffer_bytes(substream);
621 if (buffer_size == runtime->oss.buffer_bytes)
622 return bytes_to_frames(runtime, bytes);
623 return bytes_to_frames(runtime, (buffer_size * bytes) / runtime->oss.buffer_bytes);
627 snd_pcm_uframes_t get_hw_ptr_period(struct snd_pcm_runtime *runtime)
629 return runtime->hw_ptr_interrupt;
632 /* define extended formats in the recent OSS versions (if any) */
634 #define AFMT_S32_LE 0x00001000
635 #define AFMT_S32_BE 0x00002000
636 #define AFMT_S24_LE 0x00008000
637 #define AFMT_S24_BE 0x00010000
638 #define AFMT_S24_PACKED 0x00040000
640 /* other supported formats */
641 #define AFMT_FLOAT 0x00004000
642 #define AFMT_SPDIF_RAW 0x00020000
644 /* unsupported formats */
645 #define AFMT_AC3 0x00000400
646 #define AFMT_VORBIS 0x00000800
648 static snd_pcm_format_t snd_pcm_oss_format_from(int format)
651 case AFMT_MU_LAW: return SNDRV_PCM_FORMAT_MU_LAW;
652 case AFMT_A_LAW: return SNDRV_PCM_FORMAT_A_LAW;
653 case AFMT_IMA_ADPCM: return SNDRV_PCM_FORMAT_IMA_ADPCM;
654 case AFMT_U8: return SNDRV_PCM_FORMAT_U8;
655 case AFMT_S16_LE: return SNDRV_PCM_FORMAT_S16_LE;
656 case AFMT_S16_BE: return SNDRV_PCM_FORMAT_S16_BE;
657 case AFMT_S8: return SNDRV_PCM_FORMAT_S8;
658 case AFMT_U16_LE: return SNDRV_PCM_FORMAT_U16_LE;
659 case AFMT_U16_BE: return SNDRV_PCM_FORMAT_U16_BE;
660 case AFMT_MPEG: return SNDRV_PCM_FORMAT_MPEG;
661 case AFMT_S32_LE: return SNDRV_PCM_FORMAT_S32_LE;
662 case AFMT_S32_BE: return SNDRV_PCM_FORMAT_S32_BE;
663 case AFMT_S24_LE: return SNDRV_PCM_FORMAT_S24_LE;
664 case AFMT_S24_BE: return SNDRV_PCM_FORMAT_S24_BE;
665 case AFMT_S24_PACKED: return SNDRV_PCM_FORMAT_S24_3LE;
666 case AFMT_FLOAT: return SNDRV_PCM_FORMAT_FLOAT;
667 case AFMT_SPDIF_RAW: return SNDRV_PCM_FORMAT_IEC958_SUBFRAME;
668 default: return SNDRV_PCM_FORMAT_U8;
672 static int snd_pcm_oss_format_to(snd_pcm_format_t format)
675 case SNDRV_PCM_FORMAT_MU_LAW: return AFMT_MU_LAW;
676 case SNDRV_PCM_FORMAT_A_LAW: return AFMT_A_LAW;
677 case SNDRV_PCM_FORMAT_IMA_ADPCM: return AFMT_IMA_ADPCM;
678 case SNDRV_PCM_FORMAT_U8: return AFMT_U8;
679 case SNDRV_PCM_FORMAT_S16_LE: return AFMT_S16_LE;
680 case SNDRV_PCM_FORMAT_S16_BE: return AFMT_S16_BE;
681 case SNDRV_PCM_FORMAT_S8: return AFMT_S8;
682 case SNDRV_PCM_FORMAT_U16_LE: return AFMT_U16_LE;
683 case SNDRV_PCM_FORMAT_U16_BE: return AFMT_U16_BE;
684 case SNDRV_PCM_FORMAT_MPEG: return AFMT_MPEG;
685 case SNDRV_PCM_FORMAT_S32_LE: return AFMT_S32_LE;
686 case SNDRV_PCM_FORMAT_S32_BE: return AFMT_S32_BE;
687 case SNDRV_PCM_FORMAT_S24_LE: return AFMT_S24_LE;
688 case SNDRV_PCM_FORMAT_S24_BE: return AFMT_S24_BE;
689 case SNDRV_PCM_FORMAT_S24_3LE: return AFMT_S24_PACKED;
690 case SNDRV_PCM_FORMAT_FLOAT: return AFMT_FLOAT;
691 case SNDRV_PCM_FORMAT_IEC958_SUBFRAME: return AFMT_SPDIF_RAW;
692 default: return -EINVAL;
696 static int snd_pcm_oss_period_size(struct snd_pcm_substream *substream,
697 struct snd_pcm_hw_params *oss_params,
698 struct snd_pcm_hw_params *slave_params)
701 ssize_t oss_buffer_size;
702 ssize_t oss_period_size, oss_periods;
703 ssize_t min_period_size, max_period_size;
704 struct snd_pcm_runtime *runtime = substream->runtime;
705 size_t oss_frame_size;
707 oss_frame_size = snd_pcm_format_physical_width(params_format(oss_params)) *
708 params_channels(oss_params) / 8;
710 oss_buffer_size = snd_pcm_hw_param_value_max(slave_params,
711 SNDRV_PCM_HW_PARAM_BUFFER_SIZE,
713 if (oss_buffer_size <= 0)
715 oss_buffer_size = snd_pcm_plug_client_size(substream,
716 oss_buffer_size * oss_frame_size);
717 if (oss_buffer_size <= 0)
719 oss_buffer_size = rounddown_pow_of_two(oss_buffer_size);
720 if (atomic_read(&substream->mmap_count)) {
721 if (oss_buffer_size > runtime->oss.mmap_bytes)
722 oss_buffer_size = runtime->oss.mmap_bytes;
725 if (substream->oss.setup.period_size > 16)
726 oss_period_size = substream->oss.setup.period_size;
727 else if (runtime->oss.fragshift) {
728 oss_period_size = 1 << runtime->oss.fragshift;
729 if (oss_period_size > oss_buffer_size / 2)
730 oss_period_size = oss_buffer_size / 2;
733 size_t bytes_per_sec = params_rate(oss_params) * snd_pcm_format_physical_width(params_format(oss_params)) * params_channels(oss_params) / 8;
735 oss_period_size = oss_buffer_size;
737 oss_period_size /= 2;
738 } while (oss_period_size > bytes_per_sec);
739 if (runtime->oss.subdivision == 0) {
741 if (oss_period_size / sd > 4096)
743 if (oss_period_size / sd < 4096)
746 sd = runtime->oss.subdivision;
747 oss_period_size /= sd;
748 if (oss_period_size < 16)
749 oss_period_size = 16;
752 min_period_size = snd_pcm_plug_client_size(substream,
753 snd_pcm_hw_param_value_min(slave_params, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, NULL));
754 if (min_period_size > 0) {
755 min_period_size *= oss_frame_size;
756 min_period_size = roundup_pow_of_two(min_period_size);
757 if (oss_period_size < min_period_size)
758 oss_period_size = min_period_size;
761 max_period_size = snd_pcm_plug_client_size(substream,
762 snd_pcm_hw_param_value_max(slave_params, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, NULL));
763 if (max_period_size > 0) {
764 max_period_size *= oss_frame_size;
765 max_period_size = rounddown_pow_of_two(max_period_size);
766 if (oss_period_size > max_period_size)
767 oss_period_size = max_period_size;
770 oss_periods = oss_buffer_size / oss_period_size;
772 if (substream->oss.setup.periods > 1)
773 oss_periods = substream->oss.setup.periods;
775 s = snd_pcm_hw_param_value_max(slave_params, SNDRV_PCM_HW_PARAM_PERIODS, NULL);
776 if (s > 0 && runtime->oss.maxfrags && s > runtime->oss.maxfrags)
777 s = runtime->oss.maxfrags;
781 s = snd_pcm_hw_param_value_min(slave_params, SNDRV_PCM_HW_PARAM_PERIODS, NULL);
787 while (oss_period_size * oss_periods > oss_buffer_size)
788 oss_period_size /= 2;
790 if (oss_period_size < 16)
793 /* don't allocate too large period; 1MB period must be enough */
794 if (oss_period_size > 1024 * 1024)
797 runtime->oss.period_bytes = oss_period_size;
798 runtime->oss.period_frames = 1;
799 runtime->oss.periods = oss_periods;
803 static int choose_rate(struct snd_pcm_substream *substream,
804 struct snd_pcm_hw_params *params, unsigned int best_rate)
806 const struct snd_interval *it;
807 struct snd_pcm_hw_params *save;
808 unsigned int rate, prev;
810 save = kmalloc(sizeof(*save), GFP_KERNEL);
814 it = hw_param_interval_c(save, SNDRV_PCM_HW_PARAM_RATE);
816 /* try multiples of the best rate */
819 if (it->max < rate || (it->max == rate && it->openmax))
821 if (it->min < rate || (it->min == rate && !it->openmin)) {
823 ret = snd_pcm_hw_param_set(substream, params,
824 SNDRV_PCM_HW_PARAM_RATE,
826 if (ret == (int)rate) {
838 /* not found, use the nearest rate */
840 return snd_pcm_hw_param_near(substream, params, SNDRV_PCM_HW_PARAM_RATE, best_rate, NULL);
843 /* parameter locking: returns immediately if tried during streaming */
844 static int lock_params(struct snd_pcm_runtime *runtime)
846 if (mutex_lock_interruptible(&runtime->oss.params_lock))
848 if (atomic_read(&runtime->oss.rw_ref)) {
849 mutex_unlock(&runtime->oss.params_lock);
855 static void unlock_params(struct snd_pcm_runtime *runtime)
857 mutex_unlock(&runtime->oss.params_lock);
860 /* call with params_lock held */
861 static int snd_pcm_oss_change_params_locked(struct snd_pcm_substream *substream)
863 struct snd_pcm_runtime *runtime = substream->runtime;
864 struct snd_pcm_hw_params *params, *sparams;
865 struct snd_pcm_sw_params *sw_params;
866 ssize_t oss_buffer_size, oss_period_size;
867 size_t oss_frame_size;
870 snd_pcm_format_t format, sformat;
872 const struct snd_mask *sformat_mask;
873 struct snd_mask mask;
875 if (!runtime->oss.params)
877 sw_params = kzalloc(sizeof(*sw_params), GFP_KERNEL);
878 params = kmalloc(sizeof(*params), GFP_KERNEL);
879 sparams = kmalloc(sizeof(*sparams), GFP_KERNEL);
880 if (!sw_params || !params || !sparams) {
885 if (atomic_read(&substream->mmap_count))
888 direct = substream->oss.setup.direct;
890 _snd_pcm_hw_params_any(sparams);
891 _snd_pcm_hw_param_setinteger(sparams, SNDRV_PCM_HW_PARAM_PERIODS);
892 _snd_pcm_hw_param_min(sparams, SNDRV_PCM_HW_PARAM_PERIODS, 2, 0);
893 snd_mask_none(&mask);
894 if (atomic_read(&substream->mmap_count))
895 snd_mask_set(&mask, (__force int)SNDRV_PCM_ACCESS_MMAP_INTERLEAVED);
897 snd_mask_set(&mask, (__force int)SNDRV_PCM_ACCESS_RW_INTERLEAVED);
899 snd_mask_set(&mask, (__force int)SNDRV_PCM_ACCESS_RW_NONINTERLEAVED);
901 err = snd_pcm_hw_param_mask(substream, sparams, SNDRV_PCM_HW_PARAM_ACCESS, &mask);
903 pcm_dbg(substream->pcm, "No usable accesses\n");
908 err = choose_rate(substream, sparams, runtime->oss.rate);
911 err = snd_pcm_hw_param_near(substream, sparams,
912 SNDRV_PCM_HW_PARAM_CHANNELS,
913 runtime->oss.channels, NULL);
917 format = snd_pcm_oss_format_from(runtime->oss.format);
919 sformat_mask = hw_param_mask_c(sparams, SNDRV_PCM_HW_PARAM_FORMAT);
923 sformat = snd_pcm_plug_slave_format(format, sformat_mask);
925 if ((__force int)sformat < 0 ||
926 !snd_mask_test(sformat_mask, (__force int)sformat)) {
927 for (sformat = (__force snd_pcm_format_t)0;
928 (__force int)sformat <= (__force int)SNDRV_PCM_FORMAT_LAST;
929 sformat = (__force snd_pcm_format_t)((__force int)sformat + 1)) {
930 if (snd_mask_test(sformat_mask, (__force int)sformat) &&
931 snd_pcm_oss_format_to(sformat) >= 0)
934 if ((__force int)sformat > (__force int)SNDRV_PCM_FORMAT_LAST) {
935 pcm_dbg(substream->pcm, "Cannot find a format!!!\n");
940 err = _snd_pcm_hw_param_set(sparams, SNDRV_PCM_HW_PARAM_FORMAT, (__force int)sformat, 0);
945 memcpy(params, sparams, sizeof(*params));
947 _snd_pcm_hw_params_any(params);
948 _snd_pcm_hw_param_set(params, SNDRV_PCM_HW_PARAM_ACCESS,
949 (__force int)SNDRV_PCM_ACCESS_RW_INTERLEAVED, 0);
950 _snd_pcm_hw_param_set(params, SNDRV_PCM_HW_PARAM_FORMAT,
951 (__force int)snd_pcm_oss_format_from(runtime->oss.format), 0);
952 _snd_pcm_hw_param_set(params, SNDRV_PCM_HW_PARAM_CHANNELS,
953 runtime->oss.channels, 0);
954 _snd_pcm_hw_param_set(params, SNDRV_PCM_HW_PARAM_RATE,
955 runtime->oss.rate, 0);
956 pdprintf("client: access = %i, format = %i, channels = %i, rate = %i\n",
957 params_access(params), params_format(params),
958 params_channels(params), params_rate(params));
960 pdprintf("slave: access = %i, format = %i, channels = %i, rate = %i\n",
961 params_access(sparams), params_format(sparams),
962 params_channels(sparams), params_rate(sparams));
964 oss_frame_size = snd_pcm_format_physical_width(params_format(params)) *
965 params_channels(params) / 8;
967 err = snd_pcm_oss_period_size(substream, params, sparams);
971 n = snd_pcm_plug_slave_size(substream, runtime->oss.period_bytes / oss_frame_size);
972 err = snd_pcm_hw_param_near(substream, sparams, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, n, NULL);
976 err = snd_pcm_hw_param_near(substream, sparams, SNDRV_PCM_HW_PARAM_PERIODS,
977 runtime->oss.periods, NULL);
981 snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DROP, NULL);
983 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_HW_PARAMS, sparams);
985 pcm_dbg(substream->pcm, "HW_PARAMS failed: %i\n", err);
989 #ifdef CONFIG_SND_PCM_OSS_PLUGINS
990 snd_pcm_oss_plugin_clear(substream);
992 /* add necessary plugins */
993 snd_pcm_oss_plugin_clear(substream);
994 if ((err = snd_pcm_plug_format_plugins(substream,
997 pcm_dbg(substream->pcm,
998 "snd_pcm_plug_format_plugins failed: %i\n", err);
999 snd_pcm_oss_plugin_clear(substream);
1002 if (runtime->oss.plugin_first) {
1003 struct snd_pcm_plugin *plugin;
1004 if ((err = snd_pcm_plugin_build_io(substream, sparams, &plugin)) < 0) {
1005 pcm_dbg(substream->pcm,
1006 "snd_pcm_plugin_build_io failed: %i\n", err);
1007 snd_pcm_oss_plugin_clear(substream);
1010 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
1011 err = snd_pcm_plugin_append(plugin);
1013 err = snd_pcm_plugin_insert(plugin);
1016 snd_pcm_oss_plugin_clear(substream);
1023 if (runtime->oss.trigger) {
1024 sw_params->start_threshold = 1;
1026 sw_params->start_threshold = runtime->boundary;
1028 if (atomic_read(&substream->mmap_count) ||
1029 substream->stream == SNDRV_PCM_STREAM_CAPTURE)
1030 sw_params->stop_threshold = runtime->boundary;
1032 sw_params->stop_threshold = runtime->buffer_size;
1033 sw_params->tstamp_mode = SNDRV_PCM_TSTAMP_NONE;
1034 sw_params->period_step = 1;
1035 sw_params->avail_min = substream->stream == SNDRV_PCM_STREAM_PLAYBACK ?
1036 1 : runtime->period_size;
1037 if (atomic_read(&substream->mmap_count) ||
1038 substream->oss.setup.nosilence) {
1039 sw_params->silence_threshold = 0;
1040 sw_params->silence_size = 0;
1042 snd_pcm_uframes_t frames;
1043 frames = runtime->period_size + 16;
1044 if (frames > runtime->buffer_size)
1045 frames = runtime->buffer_size;
1046 sw_params->silence_threshold = frames;
1047 sw_params->silence_size = frames;
1050 if ((err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_SW_PARAMS, sw_params)) < 0) {
1051 pcm_dbg(substream->pcm, "SW_PARAMS failed: %i\n", err);
1055 runtime->oss.periods = params_periods(sparams);
1056 oss_period_size = snd_pcm_plug_client_size(substream, params_period_size(sparams));
1057 if (oss_period_size < 0) {
1061 #ifdef CONFIG_SND_PCM_OSS_PLUGINS
1062 if (runtime->oss.plugin_first) {
1063 err = snd_pcm_plug_alloc(substream, oss_period_size);
1068 oss_period_size = array_size(oss_period_size, oss_frame_size);
1069 oss_buffer_size = array_size(oss_period_size, runtime->oss.periods);
1070 if (oss_buffer_size <= 0) {
1075 runtime->oss.period_bytes = oss_period_size;
1076 runtime->oss.buffer_bytes = oss_buffer_size;
1078 pdprintf("oss: period bytes = %i, buffer bytes = %i\n",
1079 runtime->oss.period_bytes,
1080 runtime->oss.buffer_bytes);
1081 pdprintf("slave: period_size = %i, buffer_size = %i\n",
1082 params_period_size(sparams),
1083 params_buffer_size(sparams));
1085 runtime->oss.format = snd_pcm_oss_format_to(params_format(params));
1086 runtime->oss.channels = params_channels(params);
1087 runtime->oss.rate = params_rate(params);
1089 kvfree(runtime->oss.buffer);
1090 runtime->oss.buffer = kvzalloc(runtime->oss.period_bytes, GFP_KERNEL);
1091 if (!runtime->oss.buffer) {
1096 runtime->oss.params = 0;
1097 runtime->oss.prepare = 1;
1098 runtime->oss.buffer_used = 0;
1099 if (runtime->dma_area)
1100 snd_pcm_format_set_silence(runtime->format, runtime->dma_area, bytes_to_samples(runtime, runtime->dma_bytes));
1102 runtime->oss.period_frames = snd_pcm_alsa_frames(substream, oss_period_size);
1112 /* this one takes the lock by itself */
1113 static int snd_pcm_oss_change_params(struct snd_pcm_substream *substream,
1116 struct snd_pcm_runtime *runtime = substream->runtime;
1120 if (!(mutex_trylock(&runtime->oss.params_lock)))
1122 } else if (mutex_lock_interruptible(&runtime->oss.params_lock))
1123 return -ERESTARTSYS;
1125 err = snd_pcm_oss_change_params_locked(substream);
1126 mutex_unlock(&runtime->oss.params_lock);
1130 static int snd_pcm_oss_get_active_substream(struct snd_pcm_oss_file *pcm_oss_file, struct snd_pcm_substream **r_substream)
1133 struct snd_pcm_substream *asubstream = NULL, *substream;
1135 for (idx = 0; idx < 2; idx++) {
1136 substream = pcm_oss_file->streams[idx];
1137 if (substream == NULL)
1139 if (asubstream == NULL)
1140 asubstream = substream;
1141 if (substream->runtime->oss.params) {
1142 err = snd_pcm_oss_change_params(substream, false);
1150 *r_substream = asubstream;
1154 /* call with params_lock held */
1155 /* NOTE: this always call PREPARE unconditionally no matter whether
1156 * runtime->oss.prepare is set or not
1158 static int snd_pcm_oss_prepare(struct snd_pcm_substream *substream)
1161 struct snd_pcm_runtime *runtime = substream->runtime;
1163 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_PREPARE, NULL);
1165 pcm_dbg(substream->pcm,
1166 "snd_pcm_oss_prepare: SNDRV_PCM_IOCTL_PREPARE failed\n");
1169 runtime->oss.prepare = 0;
1170 runtime->oss.prev_hw_ptr_period = 0;
1171 runtime->oss.period_ptr = 0;
1172 runtime->oss.buffer_used = 0;
1177 static int snd_pcm_oss_make_ready(struct snd_pcm_substream *substream)
1179 struct snd_pcm_runtime *runtime;
1182 runtime = substream->runtime;
1183 if (runtime->oss.params) {
1184 err = snd_pcm_oss_change_params(substream, false);
1188 if (runtime->oss.prepare) {
1189 if (mutex_lock_interruptible(&runtime->oss.params_lock))
1190 return -ERESTARTSYS;
1191 err = snd_pcm_oss_prepare(substream);
1192 mutex_unlock(&runtime->oss.params_lock);
1199 /* call with params_lock held */
1200 static int snd_pcm_oss_make_ready_locked(struct snd_pcm_substream *substream)
1202 struct snd_pcm_runtime *runtime;
1205 runtime = substream->runtime;
1206 if (runtime->oss.params) {
1207 err = snd_pcm_oss_change_params_locked(substream);
1211 if (runtime->oss.prepare) {
1212 err = snd_pcm_oss_prepare(substream);
1219 static int snd_pcm_oss_capture_position_fixup(struct snd_pcm_substream *substream, snd_pcm_sframes_t *delay)
1221 struct snd_pcm_runtime *runtime;
1222 snd_pcm_uframes_t frames;
1226 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DELAY, delay);
1229 runtime = substream->runtime;
1230 if (*delay <= (snd_pcm_sframes_t)runtime->buffer_size)
1232 /* in case of overrun, skip whole periods like OSS/Linux driver does */
1233 /* until avail(delay) <= buffer_size */
1234 frames = (*delay - runtime->buffer_size) + runtime->period_size - 1;
1235 frames /= runtime->period_size;
1236 frames *= runtime->period_size;
1237 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_FORWARD, &frames);
1244 snd_pcm_sframes_t snd_pcm_oss_write3(struct snd_pcm_substream *substream, const char *ptr, snd_pcm_uframes_t frames, int in_kernel)
1246 struct snd_pcm_runtime *runtime = substream->runtime;
1249 if (runtime->status->state == SNDRV_PCM_STATE_XRUN ||
1250 runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) {
1252 pcm_dbg(substream->pcm,
1253 "pcm_oss: write: recovering from %s\n",
1254 runtime->status->state == SNDRV_PCM_STATE_XRUN ?
1255 "XRUN" : "SUSPEND");
1257 ret = snd_pcm_oss_prepare(substream);
1261 ret = __snd_pcm_lib_xfer(substream, (void *)ptr, true,
1263 if (ret != -EPIPE && ret != -ESTRPIPE)
1265 /* test, if we can't store new data, because the stream */
1266 /* has not been started */
1267 if (runtime->status->state == SNDRV_PCM_STATE_PREPARED)
1273 snd_pcm_sframes_t snd_pcm_oss_read3(struct snd_pcm_substream *substream, char *ptr, snd_pcm_uframes_t frames, int in_kernel)
1275 struct snd_pcm_runtime *runtime = substream->runtime;
1276 snd_pcm_sframes_t delay;
1279 if (runtime->status->state == SNDRV_PCM_STATE_XRUN ||
1280 runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) {
1282 pcm_dbg(substream->pcm,
1283 "pcm_oss: read: recovering from %s\n",
1284 runtime->status->state == SNDRV_PCM_STATE_XRUN ?
1285 "XRUN" : "SUSPEND");
1287 ret = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DRAIN, NULL);
1290 } else if (runtime->status->state == SNDRV_PCM_STATE_SETUP) {
1291 ret = snd_pcm_oss_prepare(substream);
1295 ret = snd_pcm_oss_capture_position_fixup(substream, &delay);
1298 ret = __snd_pcm_lib_xfer(substream, (void *)ptr, true,
1300 if (ret == -EPIPE) {
1301 if (runtime->status->state == SNDRV_PCM_STATE_DRAINING) {
1302 ret = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DROP, NULL);
1308 if (ret != -ESTRPIPE)
1314 #ifdef CONFIG_SND_PCM_OSS_PLUGINS
1315 snd_pcm_sframes_t snd_pcm_oss_writev3(struct snd_pcm_substream *substream, void **bufs, snd_pcm_uframes_t frames)
1317 struct snd_pcm_runtime *runtime = substream->runtime;
1320 if (runtime->status->state == SNDRV_PCM_STATE_XRUN ||
1321 runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) {
1323 pcm_dbg(substream->pcm,
1324 "pcm_oss: writev: recovering from %s\n",
1325 runtime->status->state == SNDRV_PCM_STATE_XRUN ?
1326 "XRUN" : "SUSPEND");
1328 ret = snd_pcm_oss_prepare(substream);
1332 ret = snd_pcm_kernel_writev(substream, bufs, frames);
1333 if (ret != -EPIPE && ret != -ESTRPIPE)
1336 /* test, if we can't store new data, because the stream */
1337 /* has not been started */
1338 if (runtime->status->state == SNDRV_PCM_STATE_PREPARED)
1344 snd_pcm_sframes_t snd_pcm_oss_readv3(struct snd_pcm_substream *substream, void **bufs, snd_pcm_uframes_t frames)
1346 struct snd_pcm_runtime *runtime = substream->runtime;
1349 if (runtime->status->state == SNDRV_PCM_STATE_XRUN ||
1350 runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) {
1352 pcm_dbg(substream->pcm,
1353 "pcm_oss: readv: recovering from %s\n",
1354 runtime->status->state == SNDRV_PCM_STATE_XRUN ?
1355 "XRUN" : "SUSPEND");
1357 ret = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DRAIN, NULL);
1360 } else if (runtime->status->state == SNDRV_PCM_STATE_SETUP) {
1361 ret = snd_pcm_oss_prepare(substream);
1365 ret = snd_pcm_kernel_readv(substream, bufs, frames);
1366 if (ret != -EPIPE && ret != -ESTRPIPE)
1371 #endif /* CONFIG_SND_PCM_OSS_PLUGINS */
1373 static ssize_t snd_pcm_oss_write2(struct snd_pcm_substream *substream, const char *buf, size_t bytes, int in_kernel)
1375 struct snd_pcm_runtime *runtime = substream->runtime;
1376 snd_pcm_sframes_t frames, frames1;
1377 #ifdef CONFIG_SND_PCM_OSS_PLUGINS
1378 if (runtime->oss.plugin_first) {
1379 struct snd_pcm_plugin_channel *channels;
1380 size_t oss_frame_bytes = (runtime->oss.plugin_first->src_width * runtime->oss.plugin_first->src_format.channels) / 8;
1382 if (copy_from_user(runtime->oss.buffer, (const char __force __user *)buf, bytes))
1384 buf = runtime->oss.buffer;
1386 frames = bytes / oss_frame_bytes;
1387 frames1 = snd_pcm_plug_client_channels_buf(substream, (char *)buf, frames, &channels);
1390 frames1 = snd_pcm_plug_write_transfer(substream, channels, frames1);
1393 bytes = frames1 * oss_frame_bytes;
1397 frames = bytes_to_frames(runtime, bytes);
1398 frames1 = snd_pcm_oss_write3(substream, buf, frames, in_kernel);
1401 bytes = frames_to_bytes(runtime, frames1);
1406 static ssize_t snd_pcm_oss_write1(struct snd_pcm_substream *substream, const char __user *buf, size_t bytes)
1410 struct snd_pcm_runtime *runtime = substream->runtime;
1412 if (atomic_read(&substream->mmap_count))
1415 atomic_inc(&runtime->oss.rw_ref);
1417 if (mutex_lock_interruptible(&runtime->oss.params_lock)) {
1421 tmp = snd_pcm_oss_make_ready_locked(substream);
1424 if (bytes < runtime->oss.period_bytes || runtime->oss.buffer_used > 0) {
1426 if (tmp + runtime->oss.buffer_used > runtime->oss.period_bytes)
1427 tmp = runtime->oss.period_bytes - runtime->oss.buffer_used;
1429 if (copy_from_user(runtime->oss.buffer + runtime->oss.buffer_used, buf, tmp)) {
1434 runtime->oss.buffer_used += tmp;
1438 if (substream->oss.setup.partialfrag ||
1439 runtime->oss.buffer_used == runtime->oss.period_bytes) {
1440 tmp = snd_pcm_oss_write2(substream, runtime->oss.buffer + runtime->oss.period_ptr,
1441 runtime->oss.buffer_used - runtime->oss.period_ptr, 1);
1444 runtime->oss.bytes += tmp;
1445 runtime->oss.period_ptr += tmp;
1446 runtime->oss.period_ptr %= runtime->oss.period_bytes;
1447 if (runtime->oss.period_ptr == 0 ||
1448 runtime->oss.period_ptr == runtime->oss.buffer_used)
1449 runtime->oss.buffer_used = 0;
1450 else if ((substream->f_flags & O_NONBLOCK) != 0) {
1456 tmp = snd_pcm_oss_write2(substream,
1457 (const char __force *)buf,
1458 runtime->oss.period_bytes, 0);
1461 runtime->oss.bytes += tmp;
1465 if ((substream->f_flags & O_NONBLOCK) != 0 &&
1466 tmp != runtime->oss.period_bytes)
1470 mutex_unlock(&runtime->oss.params_lock);
1473 if (signal_pending(current)) {
1479 atomic_dec(&runtime->oss.rw_ref);
1480 return xfer > 0 ? (snd_pcm_sframes_t)xfer : tmp;
1483 static ssize_t snd_pcm_oss_read2(struct snd_pcm_substream *substream, char *buf, size_t bytes, int in_kernel)
1485 struct snd_pcm_runtime *runtime = substream->runtime;
1486 snd_pcm_sframes_t frames, frames1;
1487 #ifdef CONFIG_SND_PCM_OSS_PLUGINS
1488 char __user *final_dst = (char __force __user *)buf;
1489 if (runtime->oss.plugin_first) {
1490 struct snd_pcm_plugin_channel *channels;
1491 size_t oss_frame_bytes = (runtime->oss.plugin_last->dst_width * runtime->oss.plugin_last->dst_format.channels) / 8;
1493 buf = runtime->oss.buffer;
1494 frames = bytes / oss_frame_bytes;
1495 frames1 = snd_pcm_plug_client_channels_buf(substream, buf, frames, &channels);
1498 frames1 = snd_pcm_plug_read_transfer(substream, channels, frames1);
1501 bytes = frames1 * oss_frame_bytes;
1502 if (!in_kernel && copy_to_user(final_dst, buf, bytes))
1507 frames = bytes_to_frames(runtime, bytes);
1508 frames1 = snd_pcm_oss_read3(substream, buf, frames, in_kernel);
1511 bytes = frames_to_bytes(runtime, frames1);
1516 static ssize_t snd_pcm_oss_read1(struct snd_pcm_substream *substream, char __user *buf, size_t bytes)
1520 struct snd_pcm_runtime *runtime = substream->runtime;
1522 if (atomic_read(&substream->mmap_count))
1525 atomic_inc(&runtime->oss.rw_ref);
1527 if (mutex_lock_interruptible(&runtime->oss.params_lock)) {
1531 tmp = snd_pcm_oss_make_ready_locked(substream);
1534 if (bytes < runtime->oss.period_bytes || runtime->oss.buffer_used > 0) {
1535 if (runtime->oss.buffer_used == 0) {
1536 tmp = snd_pcm_oss_read2(substream, runtime->oss.buffer, runtime->oss.period_bytes, 1);
1539 runtime->oss.bytes += tmp;
1540 runtime->oss.period_ptr = tmp;
1541 runtime->oss.buffer_used = tmp;
1544 if ((size_t) tmp > runtime->oss.buffer_used)
1545 tmp = runtime->oss.buffer_used;
1546 if (copy_to_user(buf, runtime->oss.buffer + (runtime->oss.period_ptr - runtime->oss.buffer_used), tmp)) {
1553 runtime->oss.buffer_used -= tmp;
1555 tmp = snd_pcm_oss_read2(substream, (char __force *)buf,
1556 runtime->oss.period_bytes, 0);
1559 runtime->oss.bytes += tmp;
1565 mutex_unlock(&runtime->oss.params_lock);
1568 if (signal_pending(current)) {
1574 atomic_dec(&runtime->oss.rw_ref);
1575 return xfer > 0 ? (snd_pcm_sframes_t)xfer : tmp;
1578 static int snd_pcm_oss_reset(struct snd_pcm_oss_file *pcm_oss_file)
1580 struct snd_pcm_substream *substream;
1581 struct snd_pcm_runtime *runtime;
1584 for (i = 0; i < 2; i++) {
1585 substream = pcm_oss_file->streams[i];
1588 runtime = substream->runtime;
1589 snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DROP, NULL);
1590 mutex_lock(&runtime->oss.params_lock);
1591 runtime->oss.prepare = 1;
1592 runtime->oss.buffer_used = 0;
1593 runtime->oss.prev_hw_ptr_period = 0;
1594 runtime->oss.period_ptr = 0;
1595 mutex_unlock(&runtime->oss.params_lock);
1600 static int snd_pcm_oss_post(struct snd_pcm_oss_file *pcm_oss_file)
1602 struct snd_pcm_substream *substream;
1605 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
1606 if (substream != NULL) {
1607 if ((err = snd_pcm_oss_make_ready(substream)) < 0)
1609 snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_START, NULL);
1611 /* note: all errors from the start action are ignored */
1612 /* OSS apps do not know, how to handle them */
1616 static int snd_pcm_oss_sync1(struct snd_pcm_substream *substream, size_t size)
1618 struct snd_pcm_runtime *runtime;
1620 snd_pcm_state_t state;
1622 wait_queue_entry_t wait;
1624 runtime = substream->runtime;
1625 init_waitqueue_entry(&wait, current);
1626 add_wait_queue(&runtime->sleep, &wait);
1628 pcm_dbg(substream->pcm, "sync1: size = %li\n", size);
1631 result = snd_pcm_oss_write2(substream, runtime->oss.buffer, size, 1);
1633 runtime->oss.buffer_used = 0;
1637 if (result != 0 && result != -EAGAIN)
1640 set_current_state(TASK_INTERRUPTIBLE);
1641 snd_pcm_stream_lock_irq(substream);
1642 state = runtime->status->state;
1643 snd_pcm_stream_unlock_irq(substream);
1644 if (state != SNDRV_PCM_STATE_RUNNING) {
1645 set_current_state(TASK_RUNNING);
1648 res = schedule_timeout(10 * HZ);
1649 if (signal_pending(current)) {
1650 result = -ERESTARTSYS;
1654 pcm_err(substream->pcm,
1655 "OSS sync error - DMA timeout\n");
1660 remove_wait_queue(&runtime->sleep, &wait);
1664 static int snd_pcm_oss_sync(struct snd_pcm_oss_file *pcm_oss_file)
1667 unsigned int saved_f_flags;
1668 struct snd_pcm_substream *substream;
1669 struct snd_pcm_runtime *runtime;
1670 snd_pcm_format_t format;
1671 unsigned long width;
1674 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
1675 if (substream != NULL) {
1676 runtime = substream->runtime;
1677 if (atomic_read(&substream->mmap_count))
1679 if ((err = snd_pcm_oss_make_ready(substream)) < 0)
1681 atomic_inc(&runtime->oss.rw_ref);
1682 if (mutex_lock_interruptible(&runtime->oss.params_lock)) {
1683 atomic_dec(&runtime->oss.rw_ref);
1684 return -ERESTARTSYS;
1686 format = snd_pcm_oss_format_from(runtime->oss.format);
1687 width = snd_pcm_format_physical_width(format);
1688 if (runtime->oss.buffer_used > 0) {
1690 pcm_dbg(substream->pcm, "sync: buffer_used\n");
1692 size = (8 * (runtime->oss.period_bytes - runtime->oss.buffer_used) + 7) / width;
1693 snd_pcm_format_set_silence(format,
1694 runtime->oss.buffer + runtime->oss.buffer_used,
1696 err = snd_pcm_oss_sync1(substream, runtime->oss.period_bytes);
1699 } else if (runtime->oss.period_ptr > 0) {
1701 pcm_dbg(substream->pcm, "sync: period_ptr\n");
1703 size = runtime->oss.period_bytes - runtime->oss.period_ptr;
1704 snd_pcm_format_set_silence(format,
1705 runtime->oss.buffer,
1707 err = snd_pcm_oss_sync1(substream, size);
1712 * The ALSA's period might be a bit large than OSS one.
1713 * Fill the remain portion of ALSA period with zeros.
1715 size = runtime->control->appl_ptr % runtime->period_size;
1717 size = runtime->period_size - size;
1718 if (runtime->access == SNDRV_PCM_ACCESS_RW_INTERLEAVED)
1719 snd_pcm_lib_write(substream, NULL, size);
1720 else if (runtime->access == SNDRV_PCM_ACCESS_RW_NONINTERLEAVED)
1721 snd_pcm_lib_writev(substream, NULL, size);
1724 mutex_unlock(&runtime->oss.params_lock);
1725 atomic_dec(&runtime->oss.rw_ref);
1729 * finish sync: drain the buffer
1732 saved_f_flags = substream->f_flags;
1733 substream->f_flags &= ~O_NONBLOCK;
1734 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DRAIN, NULL);
1735 substream->f_flags = saved_f_flags;
1738 mutex_lock(&runtime->oss.params_lock);
1739 runtime->oss.prepare = 1;
1740 mutex_unlock(&runtime->oss.params_lock);
1743 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
1744 if (substream != NULL) {
1745 if ((err = snd_pcm_oss_make_ready(substream)) < 0)
1747 runtime = substream->runtime;
1748 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DROP, NULL);
1751 mutex_lock(&runtime->oss.params_lock);
1752 runtime->oss.buffer_used = 0;
1753 runtime->oss.prepare = 1;
1754 mutex_unlock(&runtime->oss.params_lock);
1759 static int snd_pcm_oss_set_rate(struct snd_pcm_oss_file *pcm_oss_file, int rate)
1763 for (idx = 1; idx >= 0; --idx) {
1764 struct snd_pcm_substream *substream = pcm_oss_file->streams[idx];
1765 struct snd_pcm_runtime *runtime;
1768 if (substream == NULL)
1770 runtime = substream->runtime;
1773 else if (rate > 192000)
1775 err = lock_params(runtime);
1778 if (runtime->oss.rate != rate) {
1779 runtime->oss.params = 1;
1780 runtime->oss.rate = rate;
1782 unlock_params(runtime);
1784 return snd_pcm_oss_get_rate(pcm_oss_file);
1787 static int snd_pcm_oss_get_rate(struct snd_pcm_oss_file *pcm_oss_file)
1789 struct snd_pcm_substream *substream;
1792 if ((err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream)) < 0)
1794 return substream->runtime->oss.rate;
1797 static int snd_pcm_oss_set_channels(struct snd_pcm_oss_file *pcm_oss_file, unsigned int channels)
1804 for (idx = 1; idx >= 0; --idx) {
1805 struct snd_pcm_substream *substream = pcm_oss_file->streams[idx];
1806 struct snd_pcm_runtime *runtime;
1809 if (substream == NULL)
1811 runtime = substream->runtime;
1812 err = lock_params(runtime);
1815 if (runtime->oss.channels != channels) {
1816 runtime->oss.params = 1;
1817 runtime->oss.channels = channels;
1819 unlock_params(runtime);
1821 return snd_pcm_oss_get_channels(pcm_oss_file);
1824 static int snd_pcm_oss_get_channels(struct snd_pcm_oss_file *pcm_oss_file)
1826 struct snd_pcm_substream *substream;
1829 if ((err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream)) < 0)
1831 return substream->runtime->oss.channels;
1834 static int snd_pcm_oss_get_block_size(struct snd_pcm_oss_file *pcm_oss_file)
1836 struct snd_pcm_substream *substream;
1839 if ((err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream)) < 0)
1841 return substream->runtime->oss.period_bytes;
1844 static int snd_pcm_oss_get_formats(struct snd_pcm_oss_file *pcm_oss_file)
1846 struct snd_pcm_substream *substream;
1849 struct snd_pcm_hw_params *params;
1850 unsigned int formats = 0;
1851 const struct snd_mask *format_mask;
1854 if ((err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream)) < 0)
1856 if (atomic_read(&substream->mmap_count))
1859 direct = substream->oss.setup.direct;
1861 return AFMT_MU_LAW | AFMT_U8 |
1862 AFMT_S16_LE | AFMT_S16_BE |
1863 AFMT_S8 | AFMT_U16_LE |
1865 AFMT_S32_LE | AFMT_S32_BE |
1866 AFMT_S24_LE | AFMT_S24_BE |
1868 params = kmalloc(sizeof(*params), GFP_KERNEL);
1871 _snd_pcm_hw_params_any(params);
1872 err = snd_pcm_hw_refine(substream, params);
1875 format_mask = hw_param_mask_c(params, SNDRV_PCM_HW_PARAM_FORMAT);
1876 for (fmt = 0; fmt < 32; ++fmt) {
1877 if (snd_mask_test(format_mask, fmt)) {
1878 int f = snd_pcm_oss_format_to((__force snd_pcm_format_t)fmt);
1886 return err < 0 ? err : formats;
1889 static int snd_pcm_oss_set_format(struct snd_pcm_oss_file *pcm_oss_file, int format)
1894 if (format != AFMT_QUERY) {
1895 formats = snd_pcm_oss_get_formats(pcm_oss_file);
1898 if (!(formats & format))
1900 for (idx = 1; idx >= 0; --idx) {
1901 struct snd_pcm_substream *substream = pcm_oss_file->streams[idx];
1902 struct snd_pcm_runtime *runtime;
1903 if (substream == NULL)
1905 runtime = substream->runtime;
1906 err = lock_params(runtime);
1909 if (runtime->oss.format != format) {
1910 runtime->oss.params = 1;
1911 runtime->oss.format = format;
1913 unlock_params(runtime);
1916 return snd_pcm_oss_get_format(pcm_oss_file);
1919 static int snd_pcm_oss_get_format(struct snd_pcm_oss_file *pcm_oss_file)
1921 struct snd_pcm_substream *substream;
1924 if ((err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream)) < 0)
1926 return substream->runtime->oss.format;
1929 static int snd_pcm_oss_set_subdivide1(struct snd_pcm_substream *substream, int subdivide)
1931 struct snd_pcm_runtime *runtime;
1933 runtime = substream->runtime;
1934 if (subdivide == 0) {
1935 subdivide = runtime->oss.subdivision;
1940 if (runtime->oss.subdivision || runtime->oss.fragshift)
1942 if (subdivide != 1 && subdivide != 2 && subdivide != 4 &&
1943 subdivide != 8 && subdivide != 16)
1945 runtime->oss.subdivision = subdivide;
1946 runtime->oss.params = 1;
1950 static int snd_pcm_oss_set_subdivide(struct snd_pcm_oss_file *pcm_oss_file, int subdivide)
1952 int err = -EINVAL, idx;
1954 for (idx = 1; idx >= 0; --idx) {
1955 struct snd_pcm_substream *substream = pcm_oss_file->streams[idx];
1956 struct snd_pcm_runtime *runtime;
1958 if (substream == NULL)
1960 runtime = substream->runtime;
1961 err = lock_params(runtime);
1964 err = snd_pcm_oss_set_subdivide1(substream, subdivide);
1965 unlock_params(runtime);
1972 static int snd_pcm_oss_set_fragment1(struct snd_pcm_substream *substream, unsigned int val)
1974 struct snd_pcm_runtime *runtime;
1977 runtime = substream->runtime;
1978 if (runtime->oss.subdivision || runtime->oss.fragshift)
1980 fragshift = val & 0xffff;
1981 if (fragshift >= 25) /* should be large enough */
1983 runtime->oss.fragshift = fragshift;
1984 runtime->oss.maxfrags = (val >> 16) & 0xffff;
1985 if (runtime->oss.fragshift < 4) /* < 16 */
1986 runtime->oss.fragshift = 4;
1987 if (runtime->oss.maxfrags < 2)
1988 runtime->oss.maxfrags = 2;
1989 runtime->oss.params = 1;
1993 static int snd_pcm_oss_set_fragment(struct snd_pcm_oss_file *pcm_oss_file, unsigned int val)
1995 int err = -EINVAL, idx;
1997 for (idx = 1; idx >= 0; --idx) {
1998 struct snd_pcm_substream *substream = pcm_oss_file->streams[idx];
1999 struct snd_pcm_runtime *runtime;
2001 if (substream == NULL)
2003 runtime = substream->runtime;
2004 err = lock_params(runtime);
2007 err = snd_pcm_oss_set_fragment1(substream, val);
2008 unlock_params(runtime);
2015 static int snd_pcm_oss_nonblock(struct file * file)
2017 spin_lock(&file->f_lock);
2018 file->f_flags |= O_NONBLOCK;
2019 spin_unlock(&file->f_lock);
2023 static int snd_pcm_oss_get_caps1(struct snd_pcm_substream *substream, int res)
2026 if (substream == NULL) {
2027 res &= ~DSP_CAP_DUPLEX;
2030 #ifdef DSP_CAP_MULTI
2031 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
2032 if (substream->pstr->substream_count > 1)
2033 res |= DSP_CAP_MULTI;
2035 /* DSP_CAP_REALTIME is set all times: */
2036 /* all ALSA drivers can return actual pointer in ring buffer */
2037 #if defined(DSP_CAP_REALTIME) && 0
2039 struct snd_pcm_runtime *runtime = substream->runtime;
2040 if (runtime->info & (SNDRV_PCM_INFO_BLOCK_TRANSFER|SNDRV_PCM_INFO_BATCH))
2041 res &= ~DSP_CAP_REALTIME;
2047 static int snd_pcm_oss_get_caps(struct snd_pcm_oss_file *pcm_oss_file)
2051 result = DSP_CAP_TRIGGER | DSP_CAP_MMAP | DSP_CAP_DUPLEX | DSP_CAP_REALTIME;
2052 for (idx = 0; idx < 2; idx++) {
2053 struct snd_pcm_substream *substream = pcm_oss_file->streams[idx];
2054 result = snd_pcm_oss_get_caps1(substream, result);
2056 result |= 0x0001; /* revision - same as SB AWE 64 */
2060 static void snd_pcm_oss_simulate_fill(struct snd_pcm_substream *substream,
2061 snd_pcm_uframes_t hw_ptr)
2063 struct snd_pcm_runtime *runtime = substream->runtime;
2064 snd_pcm_uframes_t appl_ptr;
2065 appl_ptr = hw_ptr + runtime->buffer_size;
2066 appl_ptr %= runtime->boundary;
2067 runtime->control->appl_ptr = appl_ptr;
2070 static int snd_pcm_oss_set_trigger(struct snd_pcm_oss_file *pcm_oss_file, int trigger)
2072 struct snd_pcm_runtime *runtime;
2073 struct snd_pcm_substream *psubstream = NULL, *csubstream = NULL;
2077 pr_debug("pcm_oss: trigger = 0x%x\n", trigger);
2080 psubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
2081 csubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
2084 if ((err = snd_pcm_oss_make_ready(psubstream)) < 0)
2088 if ((err = snd_pcm_oss_make_ready(csubstream)) < 0)
2092 runtime = psubstream->runtime;
2094 if (mutex_lock_interruptible(&runtime->oss.params_lock))
2095 return -ERESTARTSYS;
2096 if (trigger & PCM_ENABLE_OUTPUT) {
2097 if (runtime->oss.trigger)
2099 if (atomic_read(&psubstream->mmap_count))
2100 snd_pcm_oss_simulate_fill(psubstream,
2101 get_hw_ptr_period(runtime));
2102 runtime->oss.trigger = 1;
2103 runtime->start_threshold = 1;
2104 cmd = SNDRV_PCM_IOCTL_START;
2106 if (!runtime->oss.trigger)
2108 runtime->oss.trigger = 0;
2109 runtime->start_threshold = runtime->boundary;
2110 cmd = SNDRV_PCM_IOCTL_DROP;
2111 runtime->oss.prepare = 1;
2114 mutex_unlock(&runtime->oss.params_lock);
2116 err = snd_pcm_kernel_ioctl(psubstream, cmd, NULL);
2122 runtime = csubstream->runtime;
2124 if (mutex_lock_interruptible(&runtime->oss.params_lock))
2125 return -ERESTARTSYS;
2126 if (trigger & PCM_ENABLE_INPUT) {
2127 if (runtime->oss.trigger)
2129 runtime->oss.trigger = 1;
2130 runtime->start_threshold = 1;
2131 cmd = SNDRV_PCM_IOCTL_START;
2133 if (!runtime->oss.trigger)
2135 runtime->oss.trigger = 0;
2136 runtime->start_threshold = runtime->boundary;
2137 cmd = SNDRV_PCM_IOCTL_DROP;
2138 runtime->oss.prepare = 1;
2141 mutex_unlock(&runtime->oss.params_lock);
2143 err = snd_pcm_kernel_ioctl(csubstream, cmd, NULL);
2151 static int snd_pcm_oss_get_trigger(struct snd_pcm_oss_file *pcm_oss_file)
2153 struct snd_pcm_substream *psubstream = NULL, *csubstream = NULL;
2156 psubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
2157 csubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
2158 if (psubstream && psubstream->runtime && psubstream->runtime->oss.trigger)
2159 result |= PCM_ENABLE_OUTPUT;
2160 if (csubstream && csubstream->runtime && csubstream->runtime->oss.trigger)
2161 result |= PCM_ENABLE_INPUT;
2165 static int snd_pcm_oss_get_odelay(struct snd_pcm_oss_file *pcm_oss_file)
2167 struct snd_pcm_substream *substream;
2168 struct snd_pcm_runtime *runtime;
2169 snd_pcm_sframes_t delay;
2172 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
2173 if (substream == NULL)
2175 if ((err = snd_pcm_oss_make_ready(substream)) < 0)
2177 runtime = substream->runtime;
2178 if (runtime->oss.params || runtime->oss.prepare)
2180 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DELAY, &delay);
2182 delay = 0; /* hack for broken OSS applications */
2185 return snd_pcm_oss_bytes(substream, delay);
2188 static int snd_pcm_oss_get_ptr(struct snd_pcm_oss_file *pcm_oss_file, int stream, struct count_info __user * _info)
2190 struct snd_pcm_substream *substream;
2191 struct snd_pcm_runtime *runtime;
2192 snd_pcm_sframes_t delay;
2194 struct count_info info;
2199 substream = pcm_oss_file->streams[stream];
2200 if (substream == NULL)
2202 if ((err = snd_pcm_oss_make_ready(substream)) < 0)
2204 runtime = substream->runtime;
2205 if (runtime->oss.params || runtime->oss.prepare) {
2206 memset(&info, 0, sizeof(info));
2207 if (copy_to_user(_info, &info, sizeof(info)))
2211 if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
2212 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DELAY, &delay);
2213 if (err == -EPIPE || err == -ESTRPIPE || (! err && delay < 0)) {
2218 fixup = runtime->oss.buffer_used;
2221 err = snd_pcm_oss_capture_position_fixup(substream, &delay);
2222 fixup = -runtime->oss.buffer_used;
2226 info.ptr = snd_pcm_oss_bytes(substream, runtime->status->hw_ptr % runtime->buffer_size);
2227 if (atomic_read(&substream->mmap_count)) {
2228 snd_pcm_sframes_t n;
2229 delay = get_hw_ptr_period(runtime);
2230 n = delay - runtime->oss.prev_hw_ptr_period;
2232 n += runtime->boundary;
2233 info.blocks = n / runtime->period_size;
2234 runtime->oss.prev_hw_ptr_period = delay;
2235 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
2236 snd_pcm_oss_simulate_fill(substream, delay);
2237 info.bytes = snd_pcm_oss_bytes(substream, runtime->status->hw_ptr) & INT_MAX;
2239 delay = snd_pcm_oss_bytes(substream, delay);
2240 if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
2241 if (substream->oss.setup.buggyptr)
2242 info.blocks = (runtime->oss.buffer_bytes - delay - fixup) / runtime->oss.period_bytes;
2244 info.blocks = (delay + fixup) / runtime->oss.period_bytes;
2245 info.bytes = (runtime->oss.bytes - delay) & INT_MAX;
2248 info.blocks = delay / runtime->oss.period_bytes;
2249 info.bytes = (runtime->oss.bytes + delay) & INT_MAX;
2252 if (copy_to_user(_info, &info, sizeof(info)))
2257 static int snd_pcm_oss_get_space(struct snd_pcm_oss_file *pcm_oss_file, int stream, struct audio_buf_info __user *_info)
2259 struct snd_pcm_substream *substream;
2260 struct snd_pcm_runtime *runtime;
2261 snd_pcm_sframes_t avail;
2263 struct audio_buf_info info;
2268 substream = pcm_oss_file->streams[stream];
2269 if (substream == NULL)
2271 runtime = substream->runtime;
2273 if (runtime->oss.params &&
2274 (err = snd_pcm_oss_change_params(substream, false)) < 0)
2277 info.fragsize = runtime->oss.period_bytes;
2278 info.fragstotal = runtime->periods;
2279 if (runtime->oss.prepare) {
2280 if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
2281 info.bytes = runtime->oss.period_bytes * runtime->oss.periods;
2282 info.fragments = runtime->oss.periods;
2288 if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
2289 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DELAY, &avail);
2290 if (err == -EPIPE || err == -ESTRPIPE || (! err && avail < 0)) {
2291 avail = runtime->buffer_size;
2295 avail = runtime->buffer_size - avail;
2296 fixup = -runtime->oss.buffer_used;
2299 err = snd_pcm_oss_capture_position_fixup(substream, &avail);
2300 fixup = runtime->oss.buffer_used;
2304 info.bytes = snd_pcm_oss_bytes(substream, avail) + fixup;
2305 info.fragments = info.bytes / runtime->oss.period_bytes;
2309 pcm_dbg(substream->pcm,
2310 "pcm_oss: space: bytes = %i, fragments = %i, fragstotal = %i, fragsize = %i\n",
2311 info.bytes, info.fragments, info.fragstotal, info.fragsize);
2313 if (copy_to_user(_info, &info, sizeof(info)))
2318 static int snd_pcm_oss_get_mapbuf(struct snd_pcm_oss_file *pcm_oss_file, int stream, struct buffmem_desc __user * _info)
2320 // it won't be probably implemented
2321 // pr_debug("TODO: snd_pcm_oss_get_mapbuf\n");
2325 static const char *strip_task_path(const char *path)
2327 const char *ptr, *ptrl = NULL;
2328 for (ptr = path; *ptr; ptr++) {
2335 static void snd_pcm_oss_look_for_setup(struct snd_pcm *pcm, int stream,
2336 const char *task_name,
2337 struct snd_pcm_oss_setup *rsetup)
2339 struct snd_pcm_oss_setup *setup;
2341 mutex_lock(&pcm->streams[stream].oss.setup_mutex);
2343 for (setup = pcm->streams[stream].oss.setup_list; setup;
2344 setup = setup->next) {
2345 if (!strcmp(setup->task_name, task_name))
2348 } while ((task_name = strip_task_path(task_name)) != NULL);
2352 mutex_unlock(&pcm->streams[stream].oss.setup_mutex);
2355 static void snd_pcm_oss_release_substream(struct snd_pcm_substream *substream)
2357 struct snd_pcm_runtime *runtime;
2358 runtime = substream->runtime;
2359 kvfree(runtime->oss.buffer);
2360 runtime->oss.buffer = NULL;
2361 #ifdef CONFIG_SND_PCM_OSS_PLUGINS
2362 snd_pcm_oss_plugin_clear(substream);
2364 substream->oss.oss = 0;
2367 static void snd_pcm_oss_init_substream(struct snd_pcm_substream *substream,
2368 struct snd_pcm_oss_setup *setup,
2371 struct snd_pcm_runtime *runtime;
2373 substream->oss.oss = 1;
2374 substream->oss.setup = *setup;
2375 if (setup->nonblock)
2376 substream->f_flags |= O_NONBLOCK;
2377 else if (setup->block)
2378 substream->f_flags &= ~O_NONBLOCK;
2379 runtime = substream->runtime;
2380 runtime->oss.params = 1;
2381 runtime->oss.trigger = 1;
2382 runtime->oss.rate = 8000;
2383 mutex_init(&runtime->oss.params_lock);
2384 switch (SNDRV_MINOR_OSS_DEVICE(minor)) {
2385 case SNDRV_MINOR_OSS_PCM_8:
2386 runtime->oss.format = AFMT_U8;
2388 case SNDRV_MINOR_OSS_PCM_16:
2389 runtime->oss.format = AFMT_S16_LE;
2392 runtime->oss.format = AFMT_MU_LAW;
2394 runtime->oss.channels = 1;
2395 runtime->oss.fragshift = 0;
2396 runtime->oss.maxfrags = 0;
2397 runtime->oss.subdivision = 0;
2398 substream->pcm_release = snd_pcm_oss_release_substream;
2399 atomic_set(&runtime->oss.rw_ref, 0);
2402 static int snd_pcm_oss_release_file(struct snd_pcm_oss_file *pcm_oss_file)
2407 for (cidx = 0; cidx < 2; ++cidx) {
2408 struct snd_pcm_substream *substream = pcm_oss_file->streams[cidx];
2410 snd_pcm_release_substream(substream);
2412 kfree(pcm_oss_file);
2416 static int snd_pcm_oss_open_file(struct file *file,
2417 struct snd_pcm *pcm,
2418 struct snd_pcm_oss_file **rpcm_oss_file,
2420 struct snd_pcm_oss_setup *setup)
2423 struct snd_pcm_oss_file *pcm_oss_file;
2424 struct snd_pcm_substream *substream;
2425 fmode_t f_mode = file->f_mode;
2428 *rpcm_oss_file = NULL;
2430 pcm_oss_file = kzalloc(sizeof(*pcm_oss_file), GFP_KERNEL);
2431 if (pcm_oss_file == NULL)
2434 if ((f_mode & (FMODE_WRITE|FMODE_READ)) == (FMODE_WRITE|FMODE_READ) &&
2435 (pcm->info_flags & SNDRV_PCM_INFO_HALF_DUPLEX))
2436 f_mode = FMODE_WRITE;
2438 file->f_flags &= ~O_APPEND;
2439 for (idx = 0; idx < 2; idx++) {
2440 if (setup[idx].disable)
2442 if (! pcm->streams[idx].substream_count)
2443 continue; /* no matching substream */
2444 if (idx == SNDRV_PCM_STREAM_PLAYBACK) {
2445 if (! (f_mode & FMODE_WRITE))
2448 if (! (f_mode & FMODE_READ))
2451 err = snd_pcm_open_substream(pcm, idx, file, &substream);
2453 snd_pcm_oss_release_file(pcm_oss_file);
2457 pcm_oss_file->streams[idx] = substream;
2458 substream->file = pcm_oss_file;
2459 snd_pcm_oss_init_substream(substream, &setup[idx], minor);
2462 if (!pcm_oss_file->streams[0] && !pcm_oss_file->streams[1]) {
2463 snd_pcm_oss_release_file(pcm_oss_file);
2467 file->private_data = pcm_oss_file;
2469 *rpcm_oss_file = pcm_oss_file;
2474 static int snd_task_name(struct task_struct *task, char *name, size_t size)
2478 if (snd_BUG_ON(!task || !name || size < 2))
2480 for (idx = 0; idx < sizeof(task->comm) && idx + 1 < size; idx++)
2481 name[idx] = task->comm[idx];
2486 static int snd_pcm_oss_open(struct inode *inode, struct file *file)
2490 struct snd_pcm *pcm;
2491 struct snd_pcm_oss_file *pcm_oss_file;
2492 struct snd_pcm_oss_setup setup[2];
2494 wait_queue_entry_t wait;
2496 err = nonseekable_open(inode, file);
2500 pcm = snd_lookup_oss_minor_data(iminor(inode),
2501 SNDRV_OSS_DEVICE_TYPE_PCM);
2506 err = snd_card_file_add(pcm->card, file);
2509 if (!try_module_get(pcm->card->module)) {
2513 if (snd_task_name(current, task_name, sizeof(task_name)) < 0) {
2517 memset(setup, 0, sizeof(setup));
2518 if (file->f_mode & FMODE_WRITE)
2519 snd_pcm_oss_look_for_setup(pcm, SNDRV_PCM_STREAM_PLAYBACK,
2520 task_name, &setup[0]);
2521 if (file->f_mode & FMODE_READ)
2522 snd_pcm_oss_look_for_setup(pcm, SNDRV_PCM_STREAM_CAPTURE,
2523 task_name, &setup[1]);
2525 nonblock = !!(file->f_flags & O_NONBLOCK);
2527 nonblock = nonblock_open;
2529 init_waitqueue_entry(&wait, current);
2530 add_wait_queue(&pcm->open_wait, &wait);
2531 mutex_lock(&pcm->open_mutex);
2533 err = snd_pcm_oss_open_file(file, pcm, &pcm_oss_file,
2534 iminor(inode), setup);
2537 if (err == -EAGAIN) {
2544 set_current_state(TASK_INTERRUPTIBLE);
2545 mutex_unlock(&pcm->open_mutex);
2547 mutex_lock(&pcm->open_mutex);
2548 if (pcm->card->shutdown) {
2552 if (signal_pending(current)) {
2557 remove_wait_queue(&pcm->open_wait, &wait);
2558 mutex_unlock(&pcm->open_mutex);
2561 snd_card_unref(pcm->card);
2565 module_put(pcm->card->module);
2567 snd_card_file_remove(pcm->card, file);
2570 snd_card_unref(pcm->card);
2574 static int snd_pcm_oss_release(struct inode *inode, struct file *file)
2576 struct snd_pcm *pcm;
2577 struct snd_pcm_substream *substream;
2578 struct snd_pcm_oss_file *pcm_oss_file;
2580 pcm_oss_file = file->private_data;
2581 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
2582 if (substream == NULL)
2583 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
2584 if (snd_BUG_ON(!substream))
2586 pcm = substream->pcm;
2587 if (!pcm->card->shutdown)
2588 snd_pcm_oss_sync(pcm_oss_file);
2589 mutex_lock(&pcm->open_mutex);
2590 snd_pcm_oss_release_file(pcm_oss_file);
2591 mutex_unlock(&pcm->open_mutex);
2592 wake_up(&pcm->open_wait);
2593 module_put(pcm->card->module);
2594 snd_card_file_remove(pcm->card, file);
2598 static long snd_pcm_oss_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
2600 struct snd_pcm_oss_file *pcm_oss_file;
2601 int __user *p = (int __user *)arg;
2604 pcm_oss_file = file->private_data;
2605 if (cmd == OSS_GETVERSION)
2606 return put_user(SNDRV_OSS_VERSION, p);
2607 if (cmd == OSS_ALSAEMULVER)
2608 return put_user(1, p);
2609 #if IS_REACHABLE(CONFIG_SND_MIXER_OSS)
2610 if (((cmd >> 8) & 0xff) == 'M') { /* mixer ioctl - for OSS compatibility */
2611 struct snd_pcm_substream *substream;
2613 for (idx = 0; idx < 2; ++idx) {
2614 substream = pcm_oss_file->streams[idx];
2615 if (substream != NULL)
2618 if (snd_BUG_ON(idx >= 2))
2620 return snd_mixer_oss_ioctl_card(substream->pcm->card, cmd, arg);
2623 if (((cmd >> 8) & 0xff) != 'P')
2626 pr_debug("pcm_oss: ioctl = 0x%x\n", cmd);
2629 case SNDCTL_DSP_RESET:
2630 return snd_pcm_oss_reset(pcm_oss_file);
2631 case SNDCTL_DSP_SYNC:
2632 return snd_pcm_oss_sync(pcm_oss_file);
2633 case SNDCTL_DSP_SPEED:
2634 if (get_user(res, p))
2636 if ((res = snd_pcm_oss_set_rate(pcm_oss_file, res))<0)
2638 return put_user(res, p);
2639 case SOUND_PCM_READ_RATE:
2640 res = snd_pcm_oss_get_rate(pcm_oss_file);
2643 return put_user(res, p);
2644 case SNDCTL_DSP_STEREO:
2645 if (get_user(res, p))
2647 res = res > 0 ? 2 : 1;
2648 if ((res = snd_pcm_oss_set_channels(pcm_oss_file, res)) < 0)
2650 return put_user(--res, p);
2651 case SNDCTL_DSP_GETBLKSIZE:
2652 res = snd_pcm_oss_get_block_size(pcm_oss_file);
2655 return put_user(res, p);
2656 case SNDCTL_DSP_SETFMT:
2657 if (get_user(res, p))
2659 res = snd_pcm_oss_set_format(pcm_oss_file, res);
2662 return put_user(res, p);
2663 case SOUND_PCM_READ_BITS:
2664 res = snd_pcm_oss_get_format(pcm_oss_file);
2667 return put_user(res, p);
2668 case SNDCTL_DSP_CHANNELS:
2669 if (get_user(res, p))
2671 res = snd_pcm_oss_set_channels(pcm_oss_file, res);
2674 return put_user(res, p);
2675 case SOUND_PCM_READ_CHANNELS:
2676 res = snd_pcm_oss_get_channels(pcm_oss_file);
2679 return put_user(res, p);
2680 case SOUND_PCM_WRITE_FILTER:
2681 case SOUND_PCM_READ_FILTER:
2683 case SNDCTL_DSP_POST:
2684 return snd_pcm_oss_post(pcm_oss_file);
2685 case SNDCTL_DSP_SUBDIVIDE:
2686 if (get_user(res, p))
2688 res = snd_pcm_oss_set_subdivide(pcm_oss_file, res);
2691 return put_user(res, p);
2692 case SNDCTL_DSP_SETFRAGMENT:
2693 if (get_user(res, p))
2695 return snd_pcm_oss_set_fragment(pcm_oss_file, res);
2696 case SNDCTL_DSP_GETFMTS:
2697 res = snd_pcm_oss_get_formats(pcm_oss_file);
2700 return put_user(res, p);
2701 case SNDCTL_DSP_GETOSPACE:
2702 case SNDCTL_DSP_GETISPACE:
2703 return snd_pcm_oss_get_space(pcm_oss_file,
2704 cmd == SNDCTL_DSP_GETISPACE ?
2705 SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK,
2706 (struct audio_buf_info __user *) arg);
2707 case SNDCTL_DSP_NONBLOCK:
2708 return snd_pcm_oss_nonblock(file);
2709 case SNDCTL_DSP_GETCAPS:
2710 res = snd_pcm_oss_get_caps(pcm_oss_file);
2713 return put_user(res, p);
2714 case SNDCTL_DSP_GETTRIGGER:
2715 res = snd_pcm_oss_get_trigger(pcm_oss_file);
2718 return put_user(res, p);
2719 case SNDCTL_DSP_SETTRIGGER:
2720 if (get_user(res, p))
2722 return snd_pcm_oss_set_trigger(pcm_oss_file, res);
2723 case SNDCTL_DSP_GETIPTR:
2724 case SNDCTL_DSP_GETOPTR:
2725 return snd_pcm_oss_get_ptr(pcm_oss_file,
2726 cmd == SNDCTL_DSP_GETIPTR ?
2727 SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK,
2728 (struct count_info __user *) arg);
2729 case SNDCTL_DSP_MAPINBUF:
2730 case SNDCTL_DSP_MAPOUTBUF:
2731 return snd_pcm_oss_get_mapbuf(pcm_oss_file,
2732 cmd == SNDCTL_DSP_MAPINBUF ?
2733 SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK,
2734 (struct buffmem_desc __user *) arg);
2735 case SNDCTL_DSP_SETSYNCRO:
2736 /* stop DMA now.. */
2738 case SNDCTL_DSP_SETDUPLEX:
2739 if (snd_pcm_oss_get_caps(pcm_oss_file) & DSP_CAP_DUPLEX)
2742 case SNDCTL_DSP_GETODELAY:
2743 res = snd_pcm_oss_get_odelay(pcm_oss_file);
2745 /* it's for sure, some broken apps don't check for error codes */
2749 return put_user(res, p);
2750 case SNDCTL_DSP_PROFILE:
2751 return 0; /* silently ignore */
2753 pr_debug("pcm_oss: unknown command = 0x%x\n", cmd);
2758 #ifdef CONFIG_COMPAT
2759 /* all compatible */
2760 static long snd_pcm_oss_ioctl_compat(struct file *file, unsigned int cmd,
2763 return snd_pcm_oss_ioctl(file, cmd, (unsigned long)compat_ptr(arg));
2766 #define snd_pcm_oss_ioctl_compat NULL
2769 static ssize_t snd_pcm_oss_read(struct file *file, char __user *buf, size_t count, loff_t *offset)
2771 struct snd_pcm_oss_file *pcm_oss_file;
2772 struct snd_pcm_substream *substream;
2774 pcm_oss_file = file->private_data;
2775 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
2776 if (substream == NULL)
2778 substream->f_flags = file->f_flags & O_NONBLOCK;
2780 return snd_pcm_oss_read1(substream, buf, count);
2783 ssize_t res = snd_pcm_oss_read1(substream, buf, count);
2784 pcm_dbg(substream->pcm,
2785 "pcm_oss: read %li bytes (returned %li bytes)\n",
2786 (long)count, (long)res);
2792 static ssize_t snd_pcm_oss_write(struct file *file, const char __user *buf, size_t count, loff_t *offset)
2794 struct snd_pcm_oss_file *pcm_oss_file;
2795 struct snd_pcm_substream *substream;
2798 pcm_oss_file = file->private_data;
2799 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
2800 if (substream == NULL)
2802 substream->f_flags = file->f_flags & O_NONBLOCK;
2803 result = snd_pcm_oss_write1(substream, buf, count);
2805 pcm_dbg(substream->pcm, "pcm_oss: write %li bytes (wrote %li bytes)\n",
2806 (long)count, (long)result);
2811 static int snd_pcm_oss_playback_ready(struct snd_pcm_substream *substream)
2813 struct snd_pcm_runtime *runtime = substream->runtime;
2814 if (atomic_read(&substream->mmap_count))
2815 return runtime->oss.prev_hw_ptr_period !=
2816 get_hw_ptr_period(runtime);
2818 return snd_pcm_playback_avail(runtime) >=
2819 runtime->oss.period_frames;
2822 static int snd_pcm_oss_capture_ready(struct snd_pcm_substream *substream)
2824 struct snd_pcm_runtime *runtime = substream->runtime;
2825 if (atomic_read(&substream->mmap_count))
2826 return runtime->oss.prev_hw_ptr_period !=
2827 get_hw_ptr_period(runtime);
2829 return snd_pcm_capture_avail(runtime) >=
2830 runtime->oss.period_frames;
2833 static __poll_t snd_pcm_oss_poll(struct file *file, poll_table * wait)
2835 struct snd_pcm_oss_file *pcm_oss_file;
2837 struct snd_pcm_substream *psubstream = NULL, *csubstream = NULL;
2839 pcm_oss_file = file->private_data;
2841 psubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
2842 csubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
2845 if (psubstream != NULL) {
2846 struct snd_pcm_runtime *runtime = psubstream->runtime;
2847 poll_wait(file, &runtime->sleep, wait);
2848 snd_pcm_stream_lock_irq(psubstream);
2849 if (runtime->status->state != SNDRV_PCM_STATE_DRAINING &&
2850 (runtime->status->state != SNDRV_PCM_STATE_RUNNING ||
2851 snd_pcm_oss_playback_ready(psubstream)))
2852 mask |= EPOLLOUT | EPOLLWRNORM;
2853 snd_pcm_stream_unlock_irq(psubstream);
2855 if (csubstream != NULL) {
2856 struct snd_pcm_runtime *runtime = csubstream->runtime;
2857 snd_pcm_state_t ostate;
2858 poll_wait(file, &runtime->sleep, wait);
2859 snd_pcm_stream_lock_irq(csubstream);
2860 if ((ostate = runtime->status->state) != SNDRV_PCM_STATE_RUNNING ||
2861 snd_pcm_oss_capture_ready(csubstream))
2862 mask |= EPOLLIN | EPOLLRDNORM;
2863 snd_pcm_stream_unlock_irq(csubstream);
2864 if (ostate != SNDRV_PCM_STATE_RUNNING && runtime->oss.trigger) {
2865 struct snd_pcm_oss_file ofile;
2866 memset(&ofile, 0, sizeof(ofile));
2867 ofile.streams[SNDRV_PCM_STREAM_CAPTURE] = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
2868 runtime->oss.trigger = 0;
2869 snd_pcm_oss_set_trigger(&ofile, PCM_ENABLE_INPUT);
2876 static int snd_pcm_oss_mmap(struct file *file, struct vm_area_struct *area)
2878 struct snd_pcm_oss_file *pcm_oss_file;
2879 struct snd_pcm_substream *substream = NULL;
2880 struct snd_pcm_runtime *runtime;
2884 pr_debug("pcm_oss: mmap begin\n");
2886 pcm_oss_file = file->private_data;
2887 switch ((area->vm_flags & (VM_READ | VM_WRITE))) {
2888 case VM_READ | VM_WRITE:
2889 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
2894 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
2897 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
2902 /* set VM_READ access as well to fix memset() routines that do
2903 reads before writes (to improve performance) */
2904 area->vm_flags |= VM_READ;
2905 if (substream == NULL)
2907 runtime = substream->runtime;
2908 if (!(runtime->info & SNDRV_PCM_INFO_MMAP_VALID))
2910 if (runtime->info & SNDRV_PCM_INFO_INTERLEAVED)
2911 runtime->access = SNDRV_PCM_ACCESS_MMAP_INTERLEAVED;
2915 if (runtime->oss.params) {
2916 /* use mutex_trylock() for params_lock for avoiding a deadlock
2917 * between mmap_sem and params_lock taken by
2918 * copy_from/to_user() in snd_pcm_oss_write/read()
2920 err = snd_pcm_oss_change_params(substream, true);
2924 #ifdef CONFIG_SND_PCM_OSS_PLUGINS
2925 if (runtime->oss.plugin_first != NULL)
2929 if (area->vm_pgoff != 0)
2932 err = snd_pcm_mmap_data(substream, file, area);
2935 runtime->oss.mmap_bytes = area->vm_end - area->vm_start;
2936 runtime->silence_threshold = 0;
2937 runtime->silence_size = 0;
2939 pr_debug("pcm_oss: mmap ok, bytes = 0x%x\n",
2940 runtime->oss.mmap_bytes);
2942 /* In mmap mode we never stop */
2943 runtime->stop_threshold = runtime->boundary;
2948 #ifdef CONFIG_SND_VERBOSE_PROCFS
2953 static void snd_pcm_oss_proc_read(struct snd_info_entry *entry,
2954 struct snd_info_buffer *buffer)
2956 struct snd_pcm_str *pstr = entry->private_data;
2957 struct snd_pcm_oss_setup *setup = pstr->oss.setup_list;
2958 mutex_lock(&pstr->oss.setup_mutex);
2960 snd_iprintf(buffer, "%s %u %u%s%s%s%s%s%s\n",
2964 setup->disable ? " disable" : "",
2965 setup->direct ? " direct" : "",
2966 setup->block ? " block" : "",
2967 setup->nonblock ? " non-block" : "",
2968 setup->partialfrag ? " partial-frag" : "",
2969 setup->nosilence ? " no-silence" : "");
2970 setup = setup->next;
2972 mutex_unlock(&pstr->oss.setup_mutex);
2975 static void snd_pcm_oss_proc_free_setup_list(struct snd_pcm_str * pstr)
2977 struct snd_pcm_oss_setup *setup, *setupn;
2979 for (setup = pstr->oss.setup_list, pstr->oss.setup_list = NULL;
2980 setup; setup = setupn) {
2981 setupn = setup->next;
2982 kfree(setup->task_name);
2985 pstr->oss.setup_list = NULL;
2988 static void snd_pcm_oss_proc_write(struct snd_info_entry *entry,
2989 struct snd_info_buffer *buffer)
2991 struct snd_pcm_str *pstr = entry->private_data;
2992 char line[128], str[32], task_name[32];
2995 struct snd_pcm_oss_setup *setup, *setup1, template;
2997 while (!snd_info_get_line(buffer, line, sizeof(line))) {
2998 mutex_lock(&pstr->oss.setup_mutex);
2999 memset(&template, 0, sizeof(template));
3000 ptr = snd_info_get_str(task_name, line, sizeof(task_name));
3001 if (!strcmp(task_name, "clear") || !strcmp(task_name, "erase")) {
3002 snd_pcm_oss_proc_free_setup_list(pstr);
3003 mutex_unlock(&pstr->oss.setup_mutex);
3006 for (setup = pstr->oss.setup_list; setup; setup = setup->next) {
3007 if (!strcmp(setup->task_name, task_name)) {
3012 ptr = snd_info_get_str(str, ptr, sizeof(str));
3013 template.periods = simple_strtoul(str, NULL, 10);
3014 ptr = snd_info_get_str(str, ptr, sizeof(str));
3015 template.period_size = simple_strtoul(str, NULL, 10);
3016 for (idx1 = 31; idx1 >= 0; idx1--)
3017 if (template.period_size & (1 << idx1))
3019 for (idx1--; idx1 >= 0; idx1--)
3020 template.period_size &= ~(1 << idx1);
3022 ptr = snd_info_get_str(str, ptr, sizeof(str));
3023 if (!strcmp(str, "disable")) {
3024 template.disable = 1;
3025 } else if (!strcmp(str, "direct")) {
3026 template.direct = 1;
3027 } else if (!strcmp(str, "block")) {
3029 } else if (!strcmp(str, "non-block")) {
3030 template.nonblock = 1;
3031 } else if (!strcmp(str, "partial-frag")) {
3032 template.partialfrag = 1;
3033 } else if (!strcmp(str, "no-silence")) {
3034 template.nosilence = 1;
3035 } else if (!strcmp(str, "buggy-ptr")) {
3036 template.buggyptr = 1;
3039 if (setup == NULL) {
3040 setup = kmalloc(sizeof(*setup), GFP_KERNEL);
3042 buffer->error = -ENOMEM;
3043 mutex_unlock(&pstr->oss.setup_mutex);
3046 if (pstr->oss.setup_list == NULL)
3047 pstr->oss.setup_list = setup;
3049 for (setup1 = pstr->oss.setup_list;
3050 setup1->next; setup1 = setup1->next);
3051 setup1->next = setup;
3053 template.task_name = kstrdup(task_name, GFP_KERNEL);
3054 if (! template.task_name) {
3056 buffer->error = -ENOMEM;
3057 mutex_unlock(&pstr->oss.setup_mutex);
3062 mutex_unlock(&pstr->oss.setup_mutex);
3066 static void snd_pcm_oss_proc_init(struct snd_pcm *pcm)
3069 for (stream = 0; stream < 2; ++stream) {
3070 struct snd_info_entry *entry;
3071 struct snd_pcm_str *pstr = &pcm->streams[stream];
3072 if (pstr->substream_count == 0)
3074 if ((entry = snd_info_create_card_entry(pcm->card, "oss", pstr->proc_root)) != NULL) {
3075 entry->content = SNDRV_INFO_CONTENT_TEXT;
3076 entry->mode = S_IFREG | 0644;
3077 entry->c.text.read = snd_pcm_oss_proc_read;
3078 entry->c.text.write = snd_pcm_oss_proc_write;
3079 entry->private_data = pstr;
3080 if (snd_info_register(entry) < 0) {
3081 snd_info_free_entry(entry);
3085 pstr->oss.proc_entry = entry;
3089 static void snd_pcm_oss_proc_done(struct snd_pcm *pcm)
3092 for (stream = 0; stream < 2; ++stream) {
3093 struct snd_pcm_str *pstr = &pcm->streams[stream];
3094 snd_info_free_entry(pstr->oss.proc_entry);
3095 pstr->oss.proc_entry = NULL;
3096 snd_pcm_oss_proc_free_setup_list(pstr);
3099 #else /* !CONFIG_SND_VERBOSE_PROCFS */
3100 #define snd_pcm_oss_proc_init(pcm)
3101 #define snd_pcm_oss_proc_done(pcm)
3102 #endif /* CONFIG_SND_VERBOSE_PROCFS */
3108 static const struct file_operations snd_pcm_oss_f_reg =
3110 .owner = THIS_MODULE,
3111 .read = snd_pcm_oss_read,
3112 .write = snd_pcm_oss_write,
3113 .open = snd_pcm_oss_open,
3114 .release = snd_pcm_oss_release,
3115 .llseek = no_llseek,
3116 .poll = snd_pcm_oss_poll,
3117 .unlocked_ioctl = snd_pcm_oss_ioctl,
3118 .compat_ioctl = snd_pcm_oss_ioctl_compat,
3119 .mmap = snd_pcm_oss_mmap,
3122 static void register_oss_dsp(struct snd_pcm *pcm, int index)
3124 if (snd_register_oss_device(SNDRV_OSS_DEVICE_TYPE_PCM,
3125 pcm->card, index, &snd_pcm_oss_f_reg,
3127 pcm_err(pcm, "unable to register OSS PCM device %i:%i\n",
3128 pcm->card->number, pcm->device);
3132 static int snd_pcm_oss_register_minor(struct snd_pcm *pcm)
3135 if (dsp_map[pcm->card->number] == (int)pcm->device) {
3138 register_oss_dsp(pcm, 0);
3139 duplex = (pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream_count > 0 &&
3140 pcm->streams[SNDRV_PCM_STREAM_CAPTURE].substream_count &&
3141 !(pcm->info_flags & SNDRV_PCM_INFO_HALF_DUPLEX));
3142 sprintf(name, "%s%s", pcm->name, duplex ? " (DUPLEX)" : "");
3143 #ifdef SNDRV_OSS_INFO_DEV_AUDIO
3144 snd_oss_info_register(SNDRV_OSS_INFO_DEV_AUDIO,
3149 pcm->oss.reg_mask |= 1;
3151 if (adsp_map[pcm->card->number] == (int)pcm->device) {
3152 register_oss_dsp(pcm, 1);
3154 pcm->oss.reg_mask |= 2;
3158 snd_pcm_oss_proc_init(pcm);
3163 static int snd_pcm_oss_disconnect_minor(struct snd_pcm *pcm)
3166 if (pcm->oss.reg_mask & 1) {
3167 pcm->oss.reg_mask &= ~1;
3168 snd_unregister_oss_device(SNDRV_OSS_DEVICE_TYPE_PCM,
3171 if (pcm->oss.reg_mask & 2) {
3172 pcm->oss.reg_mask &= ~2;
3173 snd_unregister_oss_device(SNDRV_OSS_DEVICE_TYPE_PCM,
3176 if (dsp_map[pcm->card->number] == (int)pcm->device) {
3177 #ifdef SNDRV_OSS_INFO_DEV_AUDIO
3178 snd_oss_info_unregister(SNDRV_OSS_INFO_DEV_AUDIO, pcm->card->number);
3186 static int snd_pcm_oss_unregister_minor(struct snd_pcm *pcm)
3188 snd_pcm_oss_disconnect_minor(pcm);
3189 snd_pcm_oss_proc_done(pcm);
3193 static struct snd_pcm_notify snd_pcm_oss_notify =
3195 .n_register = snd_pcm_oss_register_minor,
3196 .n_disconnect = snd_pcm_oss_disconnect_minor,
3197 .n_unregister = snd_pcm_oss_unregister_minor,
3200 static int __init alsa_pcm_oss_init(void)
3205 /* check device map table */
3206 for (i = 0; i < SNDRV_CARDS; i++) {
3207 if (dsp_map[i] < 0 || dsp_map[i] >= SNDRV_PCM_DEVICES) {
3208 pr_err("ALSA: pcm_oss: invalid dsp_map[%d] = %d\n",
3212 if (adsp_map[i] < 0 || adsp_map[i] >= SNDRV_PCM_DEVICES) {
3213 pr_err("ALSA: pcm_oss: invalid adsp_map[%d] = %d\n",
3218 if ((err = snd_pcm_notify(&snd_pcm_oss_notify, 0)) < 0)
3223 static void __exit alsa_pcm_oss_exit(void)
3225 snd_pcm_notify(&snd_pcm_oss_notify, 1);
3228 module_init(alsa_pcm_oss_init)
3229 module_exit(alsa_pcm_oss_exit)