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 size_t oss_buffer_size, oss_period_size, oss_periods;
702 size_t min_period_size, max_period_size;
703 struct snd_pcm_runtime *runtime = substream->runtime;
704 size_t oss_frame_size;
706 oss_frame_size = snd_pcm_format_physical_width(params_format(oss_params)) *
707 params_channels(oss_params) / 8;
709 oss_buffer_size = snd_pcm_plug_client_size(substream,
710 snd_pcm_hw_param_value_max(slave_params, SNDRV_PCM_HW_PARAM_BUFFER_SIZE, NULL)) * oss_frame_size;
711 oss_buffer_size = rounddown_pow_of_two(oss_buffer_size);
712 if (atomic_read(&substream->mmap_count)) {
713 if (oss_buffer_size > runtime->oss.mmap_bytes)
714 oss_buffer_size = runtime->oss.mmap_bytes;
717 if (substream->oss.setup.period_size > 16)
718 oss_period_size = substream->oss.setup.period_size;
719 else if (runtime->oss.fragshift) {
720 oss_period_size = 1 << runtime->oss.fragshift;
721 if (oss_period_size > oss_buffer_size / 2)
722 oss_period_size = oss_buffer_size / 2;
725 size_t bytes_per_sec = params_rate(oss_params) * snd_pcm_format_physical_width(params_format(oss_params)) * params_channels(oss_params) / 8;
727 oss_period_size = oss_buffer_size;
729 oss_period_size /= 2;
730 } while (oss_period_size > bytes_per_sec);
731 if (runtime->oss.subdivision == 0) {
733 if (oss_period_size / sd > 4096)
735 if (oss_period_size / sd < 4096)
738 sd = runtime->oss.subdivision;
739 oss_period_size /= sd;
740 if (oss_period_size < 16)
741 oss_period_size = 16;
744 min_period_size = snd_pcm_plug_client_size(substream,
745 snd_pcm_hw_param_value_min(slave_params, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, NULL));
746 min_period_size *= oss_frame_size;
747 min_period_size = roundup_pow_of_two(min_period_size);
748 if (oss_period_size < min_period_size)
749 oss_period_size = min_period_size;
751 max_period_size = snd_pcm_plug_client_size(substream,
752 snd_pcm_hw_param_value_max(slave_params, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, NULL));
753 max_period_size *= oss_frame_size;
754 max_period_size = rounddown_pow_of_two(max_period_size);
755 if (oss_period_size > max_period_size)
756 oss_period_size = max_period_size;
758 oss_periods = oss_buffer_size / oss_period_size;
760 if (substream->oss.setup.periods > 1)
761 oss_periods = substream->oss.setup.periods;
763 s = snd_pcm_hw_param_value_max(slave_params, SNDRV_PCM_HW_PARAM_PERIODS, NULL);
764 if (runtime->oss.maxfrags && s > runtime->oss.maxfrags)
765 s = runtime->oss.maxfrags;
769 s = snd_pcm_hw_param_value_min(slave_params, SNDRV_PCM_HW_PARAM_PERIODS, NULL);
775 while (oss_period_size * oss_periods > oss_buffer_size)
776 oss_period_size /= 2;
778 if (oss_period_size < 16)
780 runtime->oss.period_bytes = oss_period_size;
781 runtime->oss.period_frames = 1;
782 runtime->oss.periods = oss_periods;
786 static int choose_rate(struct snd_pcm_substream *substream,
787 struct snd_pcm_hw_params *params, unsigned int best_rate)
789 const struct snd_interval *it;
790 struct snd_pcm_hw_params *save;
791 unsigned int rate, prev;
793 save = kmalloc(sizeof(*save), GFP_KERNEL);
797 it = hw_param_interval_c(save, SNDRV_PCM_HW_PARAM_RATE);
799 /* try multiples of the best rate */
802 if (it->max < rate || (it->max == rate && it->openmax))
804 if (it->min < rate || (it->min == rate && !it->openmin)) {
806 ret = snd_pcm_hw_param_set(substream, params,
807 SNDRV_PCM_HW_PARAM_RATE,
809 if (ret == (int)rate) {
821 /* not found, use the nearest rate */
823 return snd_pcm_hw_param_near(substream, params, SNDRV_PCM_HW_PARAM_RATE, best_rate, NULL);
826 /* parameter locking: returns immediately if tried during streaming */
827 static int lock_params(struct snd_pcm_runtime *runtime)
829 if (mutex_lock_interruptible(&runtime->oss.params_lock))
831 if (atomic_read(&runtime->oss.rw_ref)) {
832 mutex_unlock(&runtime->oss.params_lock);
838 static void unlock_params(struct snd_pcm_runtime *runtime)
840 mutex_unlock(&runtime->oss.params_lock);
843 /* call with params_lock held */
844 static int snd_pcm_oss_change_params_locked(struct snd_pcm_substream *substream)
846 struct snd_pcm_runtime *runtime = substream->runtime;
847 struct snd_pcm_hw_params *params, *sparams;
848 struct snd_pcm_sw_params *sw_params;
849 ssize_t oss_buffer_size, oss_period_size;
850 size_t oss_frame_size;
853 snd_pcm_format_t format, sformat;
855 const struct snd_mask *sformat_mask;
856 struct snd_mask mask;
858 if (!runtime->oss.params)
860 sw_params = kzalloc(sizeof(*sw_params), GFP_KERNEL);
861 params = kmalloc(sizeof(*params), GFP_KERNEL);
862 sparams = kmalloc(sizeof(*sparams), GFP_KERNEL);
863 if (!sw_params || !params || !sparams) {
868 if (atomic_read(&substream->mmap_count))
871 direct = substream->oss.setup.direct;
873 _snd_pcm_hw_params_any(sparams);
874 _snd_pcm_hw_param_setinteger(sparams, SNDRV_PCM_HW_PARAM_PERIODS);
875 _snd_pcm_hw_param_min(sparams, SNDRV_PCM_HW_PARAM_PERIODS, 2, 0);
876 snd_mask_none(&mask);
877 if (atomic_read(&substream->mmap_count))
878 snd_mask_set(&mask, (__force int)SNDRV_PCM_ACCESS_MMAP_INTERLEAVED);
880 snd_mask_set(&mask, (__force int)SNDRV_PCM_ACCESS_RW_INTERLEAVED);
882 snd_mask_set(&mask, (__force int)SNDRV_PCM_ACCESS_RW_NONINTERLEAVED);
884 err = snd_pcm_hw_param_mask(substream, sparams, SNDRV_PCM_HW_PARAM_ACCESS, &mask);
886 pcm_dbg(substream->pcm, "No usable accesses\n");
890 choose_rate(substream, sparams, runtime->oss.rate);
891 snd_pcm_hw_param_near(substream, sparams, SNDRV_PCM_HW_PARAM_CHANNELS, runtime->oss.channels, NULL);
893 format = snd_pcm_oss_format_from(runtime->oss.format);
895 sformat_mask = hw_param_mask_c(sparams, SNDRV_PCM_HW_PARAM_FORMAT);
899 sformat = snd_pcm_plug_slave_format(format, sformat_mask);
901 if ((__force int)sformat < 0 ||
902 !snd_mask_test(sformat_mask, (__force int)sformat)) {
903 for (sformat = (__force snd_pcm_format_t)0;
904 (__force int)sformat <= (__force int)SNDRV_PCM_FORMAT_LAST;
905 sformat = (__force snd_pcm_format_t)((__force int)sformat + 1)) {
906 if (snd_mask_test(sformat_mask, (__force int)sformat) &&
907 snd_pcm_oss_format_to(sformat) >= 0)
910 if ((__force int)sformat > (__force int)SNDRV_PCM_FORMAT_LAST) {
911 pcm_dbg(substream->pcm, "Cannot find a format!!!\n");
916 err = _snd_pcm_hw_param_set(sparams, SNDRV_PCM_HW_PARAM_FORMAT, (__force int)sformat, 0);
921 memcpy(params, sparams, sizeof(*params));
923 _snd_pcm_hw_params_any(params);
924 _snd_pcm_hw_param_set(params, SNDRV_PCM_HW_PARAM_ACCESS,
925 (__force int)SNDRV_PCM_ACCESS_RW_INTERLEAVED, 0);
926 _snd_pcm_hw_param_set(params, SNDRV_PCM_HW_PARAM_FORMAT,
927 (__force int)snd_pcm_oss_format_from(runtime->oss.format), 0);
928 _snd_pcm_hw_param_set(params, SNDRV_PCM_HW_PARAM_CHANNELS,
929 runtime->oss.channels, 0);
930 _snd_pcm_hw_param_set(params, SNDRV_PCM_HW_PARAM_RATE,
931 runtime->oss.rate, 0);
932 pdprintf("client: access = %i, format = %i, channels = %i, rate = %i\n",
933 params_access(params), params_format(params),
934 params_channels(params), params_rate(params));
936 pdprintf("slave: access = %i, format = %i, channels = %i, rate = %i\n",
937 params_access(sparams), params_format(sparams),
938 params_channels(sparams), params_rate(sparams));
940 oss_frame_size = snd_pcm_format_physical_width(params_format(params)) *
941 params_channels(params) / 8;
943 #ifdef CONFIG_SND_PCM_OSS_PLUGINS
944 snd_pcm_oss_plugin_clear(substream);
946 /* add necessary plugins */
947 snd_pcm_oss_plugin_clear(substream);
948 if ((err = snd_pcm_plug_format_plugins(substream,
951 pcm_dbg(substream->pcm,
952 "snd_pcm_plug_format_plugins failed: %i\n", err);
953 snd_pcm_oss_plugin_clear(substream);
956 if (runtime->oss.plugin_first) {
957 struct snd_pcm_plugin *plugin;
958 if ((err = snd_pcm_plugin_build_io(substream, sparams, &plugin)) < 0) {
959 pcm_dbg(substream->pcm,
960 "snd_pcm_plugin_build_io failed: %i\n", err);
961 snd_pcm_oss_plugin_clear(substream);
964 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
965 err = snd_pcm_plugin_append(plugin);
967 err = snd_pcm_plugin_insert(plugin);
970 snd_pcm_oss_plugin_clear(substream);
977 err = snd_pcm_oss_period_size(substream, params, sparams);
981 n = snd_pcm_plug_slave_size(substream, runtime->oss.period_bytes / oss_frame_size);
982 err = snd_pcm_hw_param_near(substream, sparams, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, n, NULL);
986 err = snd_pcm_hw_param_near(substream, sparams, SNDRV_PCM_HW_PARAM_PERIODS,
987 runtime->oss.periods, NULL);
991 snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DROP, NULL);
993 if ((err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_HW_PARAMS, sparams)) < 0) {
994 pcm_dbg(substream->pcm, "HW_PARAMS failed: %i\n", err);
998 if (runtime->oss.trigger) {
999 sw_params->start_threshold = 1;
1001 sw_params->start_threshold = runtime->boundary;
1003 if (atomic_read(&substream->mmap_count) ||
1004 substream->stream == SNDRV_PCM_STREAM_CAPTURE)
1005 sw_params->stop_threshold = runtime->boundary;
1007 sw_params->stop_threshold = runtime->buffer_size;
1008 sw_params->tstamp_mode = SNDRV_PCM_TSTAMP_NONE;
1009 sw_params->period_step = 1;
1010 sw_params->avail_min = substream->stream == SNDRV_PCM_STREAM_PLAYBACK ?
1011 1 : runtime->period_size;
1012 if (atomic_read(&substream->mmap_count) ||
1013 substream->oss.setup.nosilence) {
1014 sw_params->silence_threshold = 0;
1015 sw_params->silence_size = 0;
1017 snd_pcm_uframes_t frames;
1018 frames = runtime->period_size + 16;
1019 if (frames > runtime->buffer_size)
1020 frames = runtime->buffer_size;
1021 sw_params->silence_threshold = frames;
1022 sw_params->silence_size = frames;
1025 if ((err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_SW_PARAMS, sw_params)) < 0) {
1026 pcm_dbg(substream->pcm, "SW_PARAMS failed: %i\n", err);
1030 runtime->oss.periods = params_periods(sparams);
1031 oss_period_size = snd_pcm_plug_client_size(substream, params_period_size(sparams));
1032 if (oss_period_size < 0) {
1036 #ifdef CONFIG_SND_PCM_OSS_PLUGINS
1037 if (runtime->oss.plugin_first) {
1038 err = snd_pcm_plug_alloc(substream, oss_period_size);
1043 oss_period_size *= oss_frame_size;
1045 oss_buffer_size = oss_period_size * runtime->oss.periods;
1046 if (oss_buffer_size < 0) {
1051 runtime->oss.period_bytes = oss_period_size;
1052 runtime->oss.buffer_bytes = oss_buffer_size;
1054 pdprintf("oss: period bytes = %i, buffer bytes = %i\n",
1055 runtime->oss.period_bytes,
1056 runtime->oss.buffer_bytes);
1057 pdprintf("slave: period_size = %i, buffer_size = %i\n",
1058 params_period_size(sparams),
1059 params_buffer_size(sparams));
1061 runtime->oss.format = snd_pcm_oss_format_to(params_format(params));
1062 runtime->oss.channels = params_channels(params);
1063 runtime->oss.rate = params_rate(params);
1065 kvfree(runtime->oss.buffer);
1066 runtime->oss.buffer = kvzalloc(runtime->oss.period_bytes, GFP_KERNEL);
1067 if (!runtime->oss.buffer) {
1072 runtime->oss.params = 0;
1073 runtime->oss.prepare = 1;
1074 runtime->oss.buffer_used = 0;
1075 if (runtime->dma_area)
1076 snd_pcm_format_set_silence(runtime->format, runtime->dma_area, bytes_to_samples(runtime, runtime->dma_bytes));
1078 runtime->oss.period_frames = snd_pcm_alsa_frames(substream, oss_period_size);
1088 /* this one takes the lock by itself */
1089 static int snd_pcm_oss_change_params(struct snd_pcm_substream *substream,
1092 struct snd_pcm_runtime *runtime = substream->runtime;
1096 if (!(mutex_trylock(&runtime->oss.params_lock)))
1098 } else if (mutex_lock_interruptible(&runtime->oss.params_lock))
1099 return -ERESTARTSYS;
1101 err = snd_pcm_oss_change_params_locked(substream);
1102 mutex_unlock(&runtime->oss.params_lock);
1106 static int snd_pcm_oss_get_active_substream(struct snd_pcm_oss_file *pcm_oss_file, struct snd_pcm_substream **r_substream)
1109 struct snd_pcm_substream *asubstream = NULL, *substream;
1111 for (idx = 0; idx < 2; idx++) {
1112 substream = pcm_oss_file->streams[idx];
1113 if (substream == NULL)
1115 if (asubstream == NULL)
1116 asubstream = substream;
1117 if (substream->runtime->oss.params) {
1118 err = snd_pcm_oss_change_params(substream, false);
1126 *r_substream = asubstream;
1130 /* call with params_lock held */
1131 /* NOTE: this always call PREPARE unconditionally no matter whether
1132 * runtime->oss.prepare is set or not
1134 static int snd_pcm_oss_prepare(struct snd_pcm_substream *substream)
1137 struct snd_pcm_runtime *runtime = substream->runtime;
1139 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_PREPARE, NULL);
1141 pcm_dbg(substream->pcm,
1142 "snd_pcm_oss_prepare: SNDRV_PCM_IOCTL_PREPARE failed\n");
1145 runtime->oss.prepare = 0;
1146 runtime->oss.prev_hw_ptr_period = 0;
1147 runtime->oss.period_ptr = 0;
1148 runtime->oss.buffer_used = 0;
1153 static int snd_pcm_oss_make_ready(struct snd_pcm_substream *substream)
1155 struct snd_pcm_runtime *runtime;
1158 runtime = substream->runtime;
1159 if (runtime->oss.params) {
1160 err = snd_pcm_oss_change_params(substream, false);
1164 if (runtime->oss.prepare) {
1165 if (mutex_lock_interruptible(&runtime->oss.params_lock))
1166 return -ERESTARTSYS;
1167 err = snd_pcm_oss_prepare(substream);
1168 mutex_unlock(&runtime->oss.params_lock);
1175 /* call with params_lock held */
1176 static int snd_pcm_oss_make_ready_locked(struct snd_pcm_substream *substream)
1178 struct snd_pcm_runtime *runtime;
1181 runtime = substream->runtime;
1182 if (runtime->oss.params) {
1183 err = snd_pcm_oss_change_params_locked(substream);
1187 if (runtime->oss.prepare) {
1188 err = snd_pcm_oss_prepare(substream);
1195 static int snd_pcm_oss_capture_position_fixup(struct snd_pcm_substream *substream, snd_pcm_sframes_t *delay)
1197 struct snd_pcm_runtime *runtime;
1198 snd_pcm_uframes_t frames;
1202 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DELAY, delay);
1205 runtime = substream->runtime;
1206 if (*delay <= (snd_pcm_sframes_t)runtime->buffer_size)
1208 /* in case of overrun, skip whole periods like OSS/Linux driver does */
1209 /* until avail(delay) <= buffer_size */
1210 frames = (*delay - runtime->buffer_size) + runtime->period_size - 1;
1211 frames /= runtime->period_size;
1212 frames *= runtime->period_size;
1213 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_FORWARD, &frames);
1220 snd_pcm_sframes_t snd_pcm_oss_write3(struct snd_pcm_substream *substream, const char *ptr, snd_pcm_uframes_t frames, int in_kernel)
1222 struct snd_pcm_runtime *runtime = substream->runtime;
1225 if (runtime->status->state == SNDRV_PCM_STATE_XRUN ||
1226 runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) {
1228 pcm_dbg(substream->pcm,
1229 "pcm_oss: write: recovering from %s\n",
1230 runtime->status->state == SNDRV_PCM_STATE_XRUN ?
1231 "XRUN" : "SUSPEND");
1233 ret = snd_pcm_oss_prepare(substream);
1237 ret = __snd_pcm_lib_xfer(substream, (void *)ptr, true,
1239 if (ret != -EPIPE && ret != -ESTRPIPE)
1241 /* test, if we can't store new data, because the stream */
1242 /* has not been started */
1243 if (runtime->status->state == SNDRV_PCM_STATE_PREPARED)
1249 snd_pcm_sframes_t snd_pcm_oss_read3(struct snd_pcm_substream *substream, char *ptr, snd_pcm_uframes_t frames, int in_kernel)
1251 struct snd_pcm_runtime *runtime = substream->runtime;
1252 snd_pcm_sframes_t delay;
1255 if (runtime->status->state == SNDRV_PCM_STATE_XRUN ||
1256 runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) {
1258 pcm_dbg(substream->pcm,
1259 "pcm_oss: read: recovering from %s\n",
1260 runtime->status->state == SNDRV_PCM_STATE_XRUN ?
1261 "XRUN" : "SUSPEND");
1263 ret = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DRAIN, NULL);
1266 } else if (runtime->status->state == SNDRV_PCM_STATE_SETUP) {
1267 ret = snd_pcm_oss_prepare(substream);
1271 ret = snd_pcm_oss_capture_position_fixup(substream, &delay);
1274 ret = __snd_pcm_lib_xfer(substream, (void *)ptr, true,
1276 if (ret == -EPIPE) {
1277 if (runtime->status->state == SNDRV_PCM_STATE_DRAINING) {
1278 ret = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DROP, NULL);
1284 if (ret != -ESTRPIPE)
1290 #ifdef CONFIG_SND_PCM_OSS_PLUGINS
1291 snd_pcm_sframes_t snd_pcm_oss_writev3(struct snd_pcm_substream *substream, void **bufs, snd_pcm_uframes_t frames)
1293 struct snd_pcm_runtime *runtime = substream->runtime;
1296 if (runtime->status->state == SNDRV_PCM_STATE_XRUN ||
1297 runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) {
1299 pcm_dbg(substream->pcm,
1300 "pcm_oss: writev: recovering from %s\n",
1301 runtime->status->state == SNDRV_PCM_STATE_XRUN ?
1302 "XRUN" : "SUSPEND");
1304 ret = snd_pcm_oss_prepare(substream);
1308 ret = snd_pcm_kernel_writev(substream, bufs, frames);
1309 if (ret != -EPIPE && ret != -ESTRPIPE)
1312 /* test, if we can't store new data, because the stream */
1313 /* has not been started */
1314 if (runtime->status->state == SNDRV_PCM_STATE_PREPARED)
1320 snd_pcm_sframes_t snd_pcm_oss_readv3(struct snd_pcm_substream *substream, void **bufs, snd_pcm_uframes_t frames)
1322 struct snd_pcm_runtime *runtime = substream->runtime;
1325 if (runtime->status->state == SNDRV_PCM_STATE_XRUN ||
1326 runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) {
1328 pcm_dbg(substream->pcm,
1329 "pcm_oss: readv: recovering from %s\n",
1330 runtime->status->state == SNDRV_PCM_STATE_XRUN ?
1331 "XRUN" : "SUSPEND");
1333 ret = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DRAIN, NULL);
1336 } else if (runtime->status->state == SNDRV_PCM_STATE_SETUP) {
1337 ret = snd_pcm_oss_prepare(substream);
1341 ret = snd_pcm_kernel_readv(substream, bufs, frames);
1342 if (ret != -EPIPE && ret != -ESTRPIPE)
1347 #endif /* CONFIG_SND_PCM_OSS_PLUGINS */
1349 static ssize_t snd_pcm_oss_write2(struct snd_pcm_substream *substream, const char *buf, size_t bytes, int in_kernel)
1351 struct snd_pcm_runtime *runtime = substream->runtime;
1352 snd_pcm_sframes_t frames, frames1;
1353 #ifdef CONFIG_SND_PCM_OSS_PLUGINS
1354 if (runtime->oss.plugin_first) {
1355 struct snd_pcm_plugin_channel *channels;
1356 size_t oss_frame_bytes = (runtime->oss.plugin_first->src_width * runtime->oss.plugin_first->src_format.channels) / 8;
1358 if (copy_from_user(runtime->oss.buffer, (const char __force __user *)buf, bytes))
1360 buf = runtime->oss.buffer;
1362 frames = bytes / oss_frame_bytes;
1363 frames1 = snd_pcm_plug_client_channels_buf(substream, (char *)buf, frames, &channels);
1366 frames1 = snd_pcm_plug_write_transfer(substream, channels, frames1);
1369 bytes = frames1 * oss_frame_bytes;
1373 frames = bytes_to_frames(runtime, bytes);
1374 frames1 = snd_pcm_oss_write3(substream, buf, frames, in_kernel);
1377 bytes = frames_to_bytes(runtime, frames1);
1382 static ssize_t snd_pcm_oss_write1(struct snd_pcm_substream *substream, const char __user *buf, size_t bytes)
1386 struct snd_pcm_runtime *runtime = substream->runtime;
1388 if (atomic_read(&substream->mmap_count))
1391 atomic_inc(&runtime->oss.rw_ref);
1393 if (mutex_lock_interruptible(&runtime->oss.params_lock)) {
1397 tmp = snd_pcm_oss_make_ready_locked(substream);
1400 if (bytes < runtime->oss.period_bytes || runtime->oss.buffer_used > 0) {
1402 if (tmp + runtime->oss.buffer_used > runtime->oss.period_bytes)
1403 tmp = runtime->oss.period_bytes - runtime->oss.buffer_used;
1405 if (copy_from_user(runtime->oss.buffer + runtime->oss.buffer_used, buf, tmp)) {
1410 runtime->oss.buffer_used += tmp;
1414 if (substream->oss.setup.partialfrag ||
1415 runtime->oss.buffer_used == runtime->oss.period_bytes) {
1416 tmp = snd_pcm_oss_write2(substream, runtime->oss.buffer + runtime->oss.period_ptr,
1417 runtime->oss.buffer_used - runtime->oss.period_ptr, 1);
1420 runtime->oss.bytes += tmp;
1421 runtime->oss.period_ptr += tmp;
1422 runtime->oss.period_ptr %= runtime->oss.period_bytes;
1423 if (runtime->oss.period_ptr == 0 ||
1424 runtime->oss.period_ptr == runtime->oss.buffer_used)
1425 runtime->oss.buffer_used = 0;
1426 else if ((substream->f_flags & O_NONBLOCK) != 0) {
1432 tmp = snd_pcm_oss_write2(substream,
1433 (const char __force *)buf,
1434 runtime->oss.period_bytes, 0);
1437 runtime->oss.bytes += tmp;
1441 if ((substream->f_flags & O_NONBLOCK) != 0 &&
1442 tmp != runtime->oss.period_bytes)
1446 mutex_unlock(&runtime->oss.params_lock);
1449 if (signal_pending(current)) {
1455 atomic_dec(&runtime->oss.rw_ref);
1456 return xfer > 0 ? (snd_pcm_sframes_t)xfer : tmp;
1459 static ssize_t snd_pcm_oss_read2(struct snd_pcm_substream *substream, char *buf, size_t bytes, int in_kernel)
1461 struct snd_pcm_runtime *runtime = substream->runtime;
1462 snd_pcm_sframes_t frames, frames1;
1463 #ifdef CONFIG_SND_PCM_OSS_PLUGINS
1464 char __user *final_dst = (char __force __user *)buf;
1465 if (runtime->oss.plugin_first) {
1466 struct snd_pcm_plugin_channel *channels;
1467 size_t oss_frame_bytes = (runtime->oss.plugin_last->dst_width * runtime->oss.plugin_last->dst_format.channels) / 8;
1469 buf = runtime->oss.buffer;
1470 frames = bytes / oss_frame_bytes;
1471 frames1 = snd_pcm_plug_client_channels_buf(substream, buf, frames, &channels);
1474 frames1 = snd_pcm_plug_read_transfer(substream, channels, frames1);
1477 bytes = frames1 * oss_frame_bytes;
1478 if (!in_kernel && copy_to_user(final_dst, buf, bytes))
1483 frames = bytes_to_frames(runtime, bytes);
1484 frames1 = snd_pcm_oss_read3(substream, buf, frames, in_kernel);
1487 bytes = frames_to_bytes(runtime, frames1);
1492 static ssize_t snd_pcm_oss_read1(struct snd_pcm_substream *substream, char __user *buf, size_t bytes)
1496 struct snd_pcm_runtime *runtime = substream->runtime;
1498 if (atomic_read(&substream->mmap_count))
1501 atomic_inc(&runtime->oss.rw_ref);
1503 if (mutex_lock_interruptible(&runtime->oss.params_lock)) {
1507 tmp = snd_pcm_oss_make_ready_locked(substream);
1510 if (bytes < runtime->oss.period_bytes || runtime->oss.buffer_used > 0) {
1511 if (runtime->oss.buffer_used == 0) {
1512 tmp = snd_pcm_oss_read2(substream, runtime->oss.buffer, runtime->oss.period_bytes, 1);
1515 runtime->oss.bytes += tmp;
1516 runtime->oss.period_ptr = tmp;
1517 runtime->oss.buffer_used = tmp;
1520 if ((size_t) tmp > runtime->oss.buffer_used)
1521 tmp = runtime->oss.buffer_used;
1522 if (copy_to_user(buf, runtime->oss.buffer + (runtime->oss.period_ptr - runtime->oss.buffer_used), tmp)) {
1529 runtime->oss.buffer_used -= tmp;
1531 tmp = snd_pcm_oss_read2(substream, (char __force *)buf,
1532 runtime->oss.period_bytes, 0);
1535 runtime->oss.bytes += tmp;
1541 mutex_unlock(&runtime->oss.params_lock);
1544 if (signal_pending(current)) {
1550 atomic_dec(&runtime->oss.rw_ref);
1551 return xfer > 0 ? (snd_pcm_sframes_t)xfer : tmp;
1554 static int snd_pcm_oss_reset(struct snd_pcm_oss_file *pcm_oss_file)
1556 struct snd_pcm_substream *substream;
1557 struct snd_pcm_runtime *runtime;
1560 for (i = 0; i < 2; i++) {
1561 substream = pcm_oss_file->streams[i];
1564 runtime = substream->runtime;
1565 snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DROP, NULL);
1566 mutex_lock(&runtime->oss.params_lock);
1567 runtime->oss.prepare = 1;
1568 runtime->oss.buffer_used = 0;
1569 runtime->oss.prev_hw_ptr_period = 0;
1570 runtime->oss.period_ptr = 0;
1571 mutex_unlock(&runtime->oss.params_lock);
1576 static int snd_pcm_oss_post(struct snd_pcm_oss_file *pcm_oss_file)
1578 struct snd_pcm_substream *substream;
1581 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
1582 if (substream != NULL) {
1583 if ((err = snd_pcm_oss_make_ready(substream)) < 0)
1585 snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_START, NULL);
1587 /* note: all errors from the start action are ignored */
1588 /* OSS apps do not know, how to handle them */
1592 static int snd_pcm_oss_sync1(struct snd_pcm_substream *substream, size_t size)
1594 struct snd_pcm_runtime *runtime;
1596 snd_pcm_state_t state;
1598 wait_queue_entry_t wait;
1600 runtime = substream->runtime;
1601 init_waitqueue_entry(&wait, current);
1602 add_wait_queue(&runtime->sleep, &wait);
1604 pcm_dbg(substream->pcm, "sync1: size = %li\n", size);
1607 result = snd_pcm_oss_write2(substream, runtime->oss.buffer, size, 1);
1609 runtime->oss.buffer_used = 0;
1613 if (result != 0 && result != -EAGAIN)
1616 set_current_state(TASK_INTERRUPTIBLE);
1617 snd_pcm_stream_lock_irq(substream);
1618 state = runtime->status->state;
1619 snd_pcm_stream_unlock_irq(substream);
1620 if (state != SNDRV_PCM_STATE_RUNNING) {
1621 set_current_state(TASK_RUNNING);
1624 res = schedule_timeout(10 * HZ);
1625 if (signal_pending(current)) {
1626 result = -ERESTARTSYS;
1630 pcm_err(substream->pcm,
1631 "OSS sync error - DMA timeout\n");
1636 remove_wait_queue(&runtime->sleep, &wait);
1640 static int snd_pcm_oss_sync(struct snd_pcm_oss_file *pcm_oss_file)
1643 unsigned int saved_f_flags;
1644 struct snd_pcm_substream *substream;
1645 struct snd_pcm_runtime *runtime;
1646 snd_pcm_format_t format;
1647 unsigned long width;
1650 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
1651 if (substream != NULL) {
1652 runtime = substream->runtime;
1653 if (atomic_read(&substream->mmap_count))
1655 if ((err = snd_pcm_oss_make_ready(substream)) < 0)
1657 atomic_inc(&runtime->oss.rw_ref);
1658 if (mutex_lock_interruptible(&runtime->oss.params_lock)) {
1659 atomic_dec(&runtime->oss.rw_ref);
1660 return -ERESTARTSYS;
1662 format = snd_pcm_oss_format_from(runtime->oss.format);
1663 width = snd_pcm_format_physical_width(format);
1664 if (runtime->oss.buffer_used > 0) {
1666 pcm_dbg(substream->pcm, "sync: buffer_used\n");
1668 size = (8 * (runtime->oss.period_bytes - runtime->oss.buffer_used) + 7) / width;
1669 snd_pcm_format_set_silence(format,
1670 runtime->oss.buffer + runtime->oss.buffer_used,
1672 err = snd_pcm_oss_sync1(substream, runtime->oss.period_bytes);
1675 } else if (runtime->oss.period_ptr > 0) {
1677 pcm_dbg(substream->pcm, "sync: period_ptr\n");
1679 size = runtime->oss.period_bytes - runtime->oss.period_ptr;
1680 snd_pcm_format_set_silence(format,
1681 runtime->oss.buffer,
1683 err = snd_pcm_oss_sync1(substream, size);
1688 * The ALSA's period might be a bit large than OSS one.
1689 * Fill the remain portion of ALSA period with zeros.
1691 size = runtime->control->appl_ptr % runtime->period_size;
1693 size = runtime->period_size - size;
1694 if (runtime->access == SNDRV_PCM_ACCESS_RW_INTERLEAVED)
1695 snd_pcm_lib_write(substream, NULL, size);
1696 else if (runtime->access == SNDRV_PCM_ACCESS_RW_NONINTERLEAVED)
1697 snd_pcm_lib_writev(substream, NULL, size);
1700 mutex_unlock(&runtime->oss.params_lock);
1701 atomic_dec(&runtime->oss.rw_ref);
1705 * finish sync: drain the buffer
1708 saved_f_flags = substream->f_flags;
1709 substream->f_flags &= ~O_NONBLOCK;
1710 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DRAIN, NULL);
1711 substream->f_flags = saved_f_flags;
1714 mutex_lock(&runtime->oss.params_lock);
1715 runtime->oss.prepare = 1;
1716 mutex_unlock(&runtime->oss.params_lock);
1719 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
1720 if (substream != NULL) {
1721 if ((err = snd_pcm_oss_make_ready(substream)) < 0)
1723 runtime = substream->runtime;
1724 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DROP, NULL);
1727 mutex_lock(&runtime->oss.params_lock);
1728 runtime->oss.buffer_used = 0;
1729 runtime->oss.prepare = 1;
1730 mutex_unlock(&runtime->oss.params_lock);
1735 static int snd_pcm_oss_set_rate(struct snd_pcm_oss_file *pcm_oss_file, int rate)
1739 for (idx = 1; idx >= 0; --idx) {
1740 struct snd_pcm_substream *substream = pcm_oss_file->streams[idx];
1741 struct snd_pcm_runtime *runtime;
1744 if (substream == NULL)
1746 runtime = substream->runtime;
1749 else if (rate > 192000)
1751 err = lock_params(runtime);
1754 if (runtime->oss.rate != rate) {
1755 runtime->oss.params = 1;
1756 runtime->oss.rate = rate;
1758 unlock_params(runtime);
1760 return snd_pcm_oss_get_rate(pcm_oss_file);
1763 static int snd_pcm_oss_get_rate(struct snd_pcm_oss_file *pcm_oss_file)
1765 struct snd_pcm_substream *substream;
1768 if ((err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream)) < 0)
1770 return substream->runtime->oss.rate;
1773 static int snd_pcm_oss_set_channels(struct snd_pcm_oss_file *pcm_oss_file, unsigned int channels)
1780 for (idx = 1; idx >= 0; --idx) {
1781 struct snd_pcm_substream *substream = pcm_oss_file->streams[idx];
1782 struct snd_pcm_runtime *runtime;
1785 if (substream == NULL)
1787 runtime = substream->runtime;
1788 err = lock_params(runtime);
1791 if (runtime->oss.channels != channels) {
1792 runtime->oss.params = 1;
1793 runtime->oss.channels = channels;
1795 unlock_params(runtime);
1797 return snd_pcm_oss_get_channels(pcm_oss_file);
1800 static int snd_pcm_oss_get_channels(struct snd_pcm_oss_file *pcm_oss_file)
1802 struct snd_pcm_substream *substream;
1805 if ((err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream)) < 0)
1807 return substream->runtime->oss.channels;
1810 static int snd_pcm_oss_get_block_size(struct snd_pcm_oss_file *pcm_oss_file)
1812 struct snd_pcm_substream *substream;
1815 if ((err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream)) < 0)
1817 return substream->runtime->oss.period_bytes;
1820 static int snd_pcm_oss_get_formats(struct snd_pcm_oss_file *pcm_oss_file)
1822 struct snd_pcm_substream *substream;
1825 struct snd_pcm_hw_params *params;
1826 unsigned int formats = 0;
1827 const struct snd_mask *format_mask;
1830 if ((err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream)) < 0)
1832 if (atomic_read(&substream->mmap_count))
1835 direct = substream->oss.setup.direct;
1837 return AFMT_MU_LAW | AFMT_U8 |
1838 AFMT_S16_LE | AFMT_S16_BE |
1839 AFMT_S8 | AFMT_U16_LE |
1841 AFMT_S32_LE | AFMT_S32_BE |
1842 AFMT_S24_LE | AFMT_S24_BE |
1844 params = kmalloc(sizeof(*params), GFP_KERNEL);
1847 _snd_pcm_hw_params_any(params);
1848 err = snd_pcm_hw_refine(substream, params);
1851 format_mask = hw_param_mask_c(params, SNDRV_PCM_HW_PARAM_FORMAT);
1852 for (fmt = 0; fmt < 32; ++fmt) {
1853 if (snd_mask_test(format_mask, fmt)) {
1854 int f = snd_pcm_oss_format_to((__force snd_pcm_format_t)fmt);
1862 return err < 0 ? err : formats;
1865 static int snd_pcm_oss_set_format(struct snd_pcm_oss_file *pcm_oss_file, int format)
1870 if (format != AFMT_QUERY) {
1871 formats = snd_pcm_oss_get_formats(pcm_oss_file);
1874 if (!(formats & format))
1876 for (idx = 1; idx >= 0; --idx) {
1877 struct snd_pcm_substream *substream = pcm_oss_file->streams[idx];
1878 struct snd_pcm_runtime *runtime;
1879 if (substream == NULL)
1881 runtime = substream->runtime;
1882 err = lock_params(runtime);
1885 if (runtime->oss.format != format) {
1886 runtime->oss.params = 1;
1887 runtime->oss.format = format;
1889 unlock_params(runtime);
1892 return snd_pcm_oss_get_format(pcm_oss_file);
1895 static int snd_pcm_oss_get_format(struct snd_pcm_oss_file *pcm_oss_file)
1897 struct snd_pcm_substream *substream;
1900 if ((err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream)) < 0)
1902 return substream->runtime->oss.format;
1905 static int snd_pcm_oss_set_subdivide1(struct snd_pcm_substream *substream, int subdivide)
1907 struct snd_pcm_runtime *runtime;
1909 runtime = substream->runtime;
1910 if (subdivide == 0) {
1911 subdivide = runtime->oss.subdivision;
1916 if (runtime->oss.subdivision || runtime->oss.fragshift)
1918 if (subdivide != 1 && subdivide != 2 && subdivide != 4 &&
1919 subdivide != 8 && subdivide != 16)
1921 runtime->oss.subdivision = subdivide;
1922 runtime->oss.params = 1;
1926 static int snd_pcm_oss_set_subdivide(struct snd_pcm_oss_file *pcm_oss_file, int subdivide)
1928 int err = -EINVAL, idx;
1930 for (idx = 1; idx >= 0; --idx) {
1931 struct snd_pcm_substream *substream = pcm_oss_file->streams[idx];
1932 struct snd_pcm_runtime *runtime;
1934 if (substream == NULL)
1936 runtime = substream->runtime;
1937 err = lock_params(runtime);
1940 err = snd_pcm_oss_set_subdivide1(substream, subdivide);
1941 unlock_params(runtime);
1948 static int snd_pcm_oss_set_fragment1(struct snd_pcm_substream *substream, unsigned int val)
1950 struct snd_pcm_runtime *runtime;
1952 runtime = substream->runtime;
1953 if (runtime->oss.subdivision || runtime->oss.fragshift)
1955 runtime->oss.fragshift = val & 0xffff;
1956 runtime->oss.maxfrags = (val >> 16) & 0xffff;
1957 if (runtime->oss.fragshift < 4) /* < 16 */
1958 runtime->oss.fragshift = 4;
1959 if (runtime->oss.maxfrags < 2)
1960 runtime->oss.maxfrags = 2;
1961 runtime->oss.params = 1;
1965 static int snd_pcm_oss_set_fragment(struct snd_pcm_oss_file *pcm_oss_file, unsigned int val)
1967 int err = -EINVAL, idx;
1969 for (idx = 1; idx >= 0; --idx) {
1970 struct snd_pcm_substream *substream = pcm_oss_file->streams[idx];
1971 struct snd_pcm_runtime *runtime;
1973 if (substream == NULL)
1975 runtime = substream->runtime;
1976 err = lock_params(runtime);
1979 err = snd_pcm_oss_set_fragment1(substream, val);
1980 unlock_params(runtime);
1987 static int snd_pcm_oss_nonblock(struct file * file)
1989 spin_lock(&file->f_lock);
1990 file->f_flags |= O_NONBLOCK;
1991 spin_unlock(&file->f_lock);
1995 static int snd_pcm_oss_get_caps1(struct snd_pcm_substream *substream, int res)
1998 if (substream == NULL) {
1999 res &= ~DSP_CAP_DUPLEX;
2002 #ifdef DSP_CAP_MULTI
2003 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
2004 if (substream->pstr->substream_count > 1)
2005 res |= DSP_CAP_MULTI;
2007 /* DSP_CAP_REALTIME is set all times: */
2008 /* all ALSA drivers can return actual pointer in ring buffer */
2009 #if defined(DSP_CAP_REALTIME) && 0
2011 struct snd_pcm_runtime *runtime = substream->runtime;
2012 if (runtime->info & (SNDRV_PCM_INFO_BLOCK_TRANSFER|SNDRV_PCM_INFO_BATCH))
2013 res &= ~DSP_CAP_REALTIME;
2019 static int snd_pcm_oss_get_caps(struct snd_pcm_oss_file *pcm_oss_file)
2023 result = DSP_CAP_TRIGGER | DSP_CAP_MMAP | DSP_CAP_DUPLEX | DSP_CAP_REALTIME;
2024 for (idx = 0; idx < 2; idx++) {
2025 struct snd_pcm_substream *substream = pcm_oss_file->streams[idx];
2026 result = snd_pcm_oss_get_caps1(substream, result);
2028 result |= 0x0001; /* revision - same as SB AWE 64 */
2032 static void snd_pcm_oss_simulate_fill(struct snd_pcm_substream *substream,
2033 snd_pcm_uframes_t hw_ptr)
2035 struct snd_pcm_runtime *runtime = substream->runtime;
2036 snd_pcm_uframes_t appl_ptr;
2037 appl_ptr = hw_ptr + runtime->buffer_size;
2038 appl_ptr %= runtime->boundary;
2039 runtime->control->appl_ptr = appl_ptr;
2042 static int snd_pcm_oss_set_trigger(struct snd_pcm_oss_file *pcm_oss_file, int trigger)
2044 struct snd_pcm_runtime *runtime;
2045 struct snd_pcm_substream *psubstream = NULL, *csubstream = NULL;
2049 pcm_dbg(substream->pcm, "pcm_oss: trigger = 0x%x\n", trigger);
2052 psubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
2053 csubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
2056 if ((err = snd_pcm_oss_make_ready(psubstream)) < 0)
2060 if ((err = snd_pcm_oss_make_ready(csubstream)) < 0)
2064 runtime = psubstream->runtime;
2066 if (mutex_lock_interruptible(&runtime->oss.params_lock))
2067 return -ERESTARTSYS;
2068 if (trigger & PCM_ENABLE_OUTPUT) {
2069 if (runtime->oss.trigger)
2071 if (atomic_read(&psubstream->mmap_count))
2072 snd_pcm_oss_simulate_fill(psubstream,
2073 get_hw_ptr_period(runtime));
2074 runtime->oss.trigger = 1;
2075 runtime->start_threshold = 1;
2076 cmd = SNDRV_PCM_IOCTL_START;
2078 if (!runtime->oss.trigger)
2080 runtime->oss.trigger = 0;
2081 runtime->start_threshold = runtime->boundary;
2082 cmd = SNDRV_PCM_IOCTL_DROP;
2083 runtime->oss.prepare = 1;
2086 mutex_unlock(&runtime->oss.params_lock);
2088 err = snd_pcm_kernel_ioctl(psubstream, cmd, NULL);
2094 runtime = csubstream->runtime;
2096 if (mutex_lock_interruptible(&runtime->oss.params_lock))
2097 return -ERESTARTSYS;
2098 if (trigger & PCM_ENABLE_INPUT) {
2099 if (runtime->oss.trigger)
2101 runtime->oss.trigger = 1;
2102 runtime->start_threshold = 1;
2103 cmd = SNDRV_PCM_IOCTL_START;
2105 if (!runtime->oss.trigger)
2107 runtime->oss.trigger = 0;
2108 runtime->start_threshold = runtime->boundary;
2109 cmd = SNDRV_PCM_IOCTL_DROP;
2110 runtime->oss.prepare = 1;
2113 mutex_unlock(&runtime->oss.params_lock);
2115 err = snd_pcm_kernel_ioctl(csubstream, cmd, NULL);
2123 static int snd_pcm_oss_get_trigger(struct snd_pcm_oss_file *pcm_oss_file)
2125 struct snd_pcm_substream *psubstream = NULL, *csubstream = NULL;
2128 psubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
2129 csubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
2130 if (psubstream && psubstream->runtime && psubstream->runtime->oss.trigger)
2131 result |= PCM_ENABLE_OUTPUT;
2132 if (csubstream && csubstream->runtime && csubstream->runtime->oss.trigger)
2133 result |= PCM_ENABLE_INPUT;
2137 static int snd_pcm_oss_get_odelay(struct snd_pcm_oss_file *pcm_oss_file)
2139 struct snd_pcm_substream *substream;
2140 struct snd_pcm_runtime *runtime;
2141 snd_pcm_sframes_t delay;
2144 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
2145 if (substream == NULL)
2147 if ((err = snd_pcm_oss_make_ready(substream)) < 0)
2149 runtime = substream->runtime;
2150 if (runtime->oss.params || runtime->oss.prepare)
2152 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DELAY, &delay);
2154 delay = 0; /* hack for broken OSS applications */
2157 return snd_pcm_oss_bytes(substream, delay);
2160 static int snd_pcm_oss_get_ptr(struct snd_pcm_oss_file *pcm_oss_file, int stream, struct count_info __user * _info)
2162 struct snd_pcm_substream *substream;
2163 struct snd_pcm_runtime *runtime;
2164 snd_pcm_sframes_t delay;
2166 struct count_info info;
2171 substream = pcm_oss_file->streams[stream];
2172 if (substream == NULL)
2174 if ((err = snd_pcm_oss_make_ready(substream)) < 0)
2176 runtime = substream->runtime;
2177 if (runtime->oss.params || runtime->oss.prepare) {
2178 memset(&info, 0, sizeof(info));
2179 if (copy_to_user(_info, &info, sizeof(info)))
2183 if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
2184 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DELAY, &delay);
2185 if (err == -EPIPE || err == -ESTRPIPE || (! err && delay < 0)) {
2190 fixup = runtime->oss.buffer_used;
2193 err = snd_pcm_oss_capture_position_fixup(substream, &delay);
2194 fixup = -runtime->oss.buffer_used;
2198 info.ptr = snd_pcm_oss_bytes(substream, runtime->status->hw_ptr % runtime->buffer_size);
2199 if (atomic_read(&substream->mmap_count)) {
2200 snd_pcm_sframes_t n;
2201 delay = get_hw_ptr_period(runtime);
2202 n = delay - runtime->oss.prev_hw_ptr_period;
2204 n += runtime->boundary;
2205 info.blocks = n / runtime->period_size;
2206 runtime->oss.prev_hw_ptr_period = delay;
2207 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
2208 snd_pcm_oss_simulate_fill(substream, delay);
2209 info.bytes = snd_pcm_oss_bytes(substream, runtime->status->hw_ptr) & INT_MAX;
2211 delay = snd_pcm_oss_bytes(substream, delay);
2212 if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
2213 if (substream->oss.setup.buggyptr)
2214 info.blocks = (runtime->oss.buffer_bytes - delay - fixup) / runtime->oss.period_bytes;
2216 info.blocks = (delay + fixup) / runtime->oss.period_bytes;
2217 info.bytes = (runtime->oss.bytes - delay) & INT_MAX;
2220 info.blocks = delay / runtime->oss.period_bytes;
2221 info.bytes = (runtime->oss.bytes + delay) & INT_MAX;
2224 if (copy_to_user(_info, &info, sizeof(info)))
2229 static int snd_pcm_oss_get_space(struct snd_pcm_oss_file *pcm_oss_file, int stream, struct audio_buf_info __user *_info)
2231 struct snd_pcm_substream *substream;
2232 struct snd_pcm_runtime *runtime;
2233 snd_pcm_sframes_t avail;
2235 struct audio_buf_info info;
2240 substream = pcm_oss_file->streams[stream];
2241 if (substream == NULL)
2243 runtime = substream->runtime;
2245 if (runtime->oss.params &&
2246 (err = snd_pcm_oss_change_params(substream, false)) < 0)
2249 info.fragsize = runtime->oss.period_bytes;
2250 info.fragstotal = runtime->periods;
2251 if (runtime->oss.prepare) {
2252 if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
2253 info.bytes = runtime->oss.period_bytes * runtime->oss.periods;
2254 info.fragments = runtime->oss.periods;
2260 if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
2261 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DELAY, &avail);
2262 if (err == -EPIPE || err == -ESTRPIPE || (! err && avail < 0)) {
2263 avail = runtime->buffer_size;
2267 avail = runtime->buffer_size - avail;
2268 fixup = -runtime->oss.buffer_used;
2271 err = snd_pcm_oss_capture_position_fixup(substream, &avail);
2272 fixup = runtime->oss.buffer_used;
2276 info.bytes = snd_pcm_oss_bytes(substream, avail) + fixup;
2277 info.fragments = info.bytes / runtime->oss.period_bytes;
2281 pcm_dbg(substream->pcm,
2282 "pcm_oss: space: bytes = %i, fragments = %i, fragstotal = %i, fragsize = %i\n",
2283 info.bytes, info.fragments, info.fragstotal, info.fragsize);
2285 if (copy_to_user(_info, &info, sizeof(info)))
2290 static int snd_pcm_oss_get_mapbuf(struct snd_pcm_oss_file *pcm_oss_file, int stream, struct buffmem_desc __user * _info)
2292 // it won't be probably implemented
2293 // pr_debug("TODO: snd_pcm_oss_get_mapbuf\n");
2297 static const char *strip_task_path(const char *path)
2299 const char *ptr, *ptrl = NULL;
2300 for (ptr = path; *ptr; ptr++) {
2307 static void snd_pcm_oss_look_for_setup(struct snd_pcm *pcm, int stream,
2308 const char *task_name,
2309 struct snd_pcm_oss_setup *rsetup)
2311 struct snd_pcm_oss_setup *setup;
2313 mutex_lock(&pcm->streams[stream].oss.setup_mutex);
2315 for (setup = pcm->streams[stream].oss.setup_list; setup;
2316 setup = setup->next) {
2317 if (!strcmp(setup->task_name, task_name))
2320 } while ((task_name = strip_task_path(task_name)) != NULL);
2324 mutex_unlock(&pcm->streams[stream].oss.setup_mutex);
2327 static void snd_pcm_oss_release_substream(struct snd_pcm_substream *substream)
2329 struct snd_pcm_runtime *runtime;
2330 runtime = substream->runtime;
2331 kvfree(runtime->oss.buffer);
2332 runtime->oss.buffer = NULL;
2333 #ifdef CONFIG_SND_PCM_OSS_PLUGINS
2334 snd_pcm_oss_plugin_clear(substream);
2336 substream->oss.oss = 0;
2339 static void snd_pcm_oss_init_substream(struct snd_pcm_substream *substream,
2340 struct snd_pcm_oss_setup *setup,
2343 struct snd_pcm_runtime *runtime;
2345 substream->oss.oss = 1;
2346 substream->oss.setup = *setup;
2347 if (setup->nonblock)
2348 substream->f_flags |= O_NONBLOCK;
2349 else if (setup->block)
2350 substream->f_flags &= ~O_NONBLOCK;
2351 runtime = substream->runtime;
2352 runtime->oss.params = 1;
2353 runtime->oss.trigger = 1;
2354 runtime->oss.rate = 8000;
2355 mutex_init(&runtime->oss.params_lock);
2356 switch (SNDRV_MINOR_OSS_DEVICE(minor)) {
2357 case SNDRV_MINOR_OSS_PCM_8:
2358 runtime->oss.format = AFMT_U8;
2360 case SNDRV_MINOR_OSS_PCM_16:
2361 runtime->oss.format = AFMT_S16_LE;
2364 runtime->oss.format = AFMT_MU_LAW;
2366 runtime->oss.channels = 1;
2367 runtime->oss.fragshift = 0;
2368 runtime->oss.maxfrags = 0;
2369 runtime->oss.subdivision = 0;
2370 substream->pcm_release = snd_pcm_oss_release_substream;
2371 atomic_set(&runtime->oss.rw_ref, 0);
2374 static int snd_pcm_oss_release_file(struct snd_pcm_oss_file *pcm_oss_file)
2379 for (cidx = 0; cidx < 2; ++cidx) {
2380 struct snd_pcm_substream *substream = pcm_oss_file->streams[cidx];
2382 snd_pcm_release_substream(substream);
2384 kfree(pcm_oss_file);
2388 static int snd_pcm_oss_open_file(struct file *file,
2389 struct snd_pcm *pcm,
2390 struct snd_pcm_oss_file **rpcm_oss_file,
2392 struct snd_pcm_oss_setup *setup)
2395 struct snd_pcm_oss_file *pcm_oss_file;
2396 struct snd_pcm_substream *substream;
2397 fmode_t f_mode = file->f_mode;
2400 *rpcm_oss_file = NULL;
2402 pcm_oss_file = kzalloc(sizeof(*pcm_oss_file), GFP_KERNEL);
2403 if (pcm_oss_file == NULL)
2406 if ((f_mode & (FMODE_WRITE|FMODE_READ)) == (FMODE_WRITE|FMODE_READ) &&
2407 (pcm->info_flags & SNDRV_PCM_INFO_HALF_DUPLEX))
2408 f_mode = FMODE_WRITE;
2410 file->f_flags &= ~O_APPEND;
2411 for (idx = 0; idx < 2; idx++) {
2412 if (setup[idx].disable)
2414 if (! pcm->streams[idx].substream_count)
2415 continue; /* no matching substream */
2416 if (idx == SNDRV_PCM_STREAM_PLAYBACK) {
2417 if (! (f_mode & FMODE_WRITE))
2420 if (! (f_mode & FMODE_READ))
2423 err = snd_pcm_open_substream(pcm, idx, file, &substream);
2425 snd_pcm_oss_release_file(pcm_oss_file);
2429 pcm_oss_file->streams[idx] = substream;
2430 snd_pcm_oss_init_substream(substream, &setup[idx], minor);
2433 if (!pcm_oss_file->streams[0] && !pcm_oss_file->streams[1]) {
2434 snd_pcm_oss_release_file(pcm_oss_file);
2438 file->private_data = pcm_oss_file;
2440 *rpcm_oss_file = pcm_oss_file;
2445 static int snd_task_name(struct task_struct *task, char *name, size_t size)
2449 if (snd_BUG_ON(!task || !name || size < 2))
2451 for (idx = 0; idx < sizeof(task->comm) && idx + 1 < size; idx++)
2452 name[idx] = task->comm[idx];
2457 static int snd_pcm_oss_open(struct inode *inode, struct file *file)
2461 struct snd_pcm *pcm;
2462 struct snd_pcm_oss_file *pcm_oss_file;
2463 struct snd_pcm_oss_setup setup[2];
2465 wait_queue_entry_t wait;
2467 err = nonseekable_open(inode, file);
2471 pcm = snd_lookup_oss_minor_data(iminor(inode),
2472 SNDRV_OSS_DEVICE_TYPE_PCM);
2477 err = snd_card_file_add(pcm->card, file);
2480 if (!try_module_get(pcm->card->module)) {
2484 if (snd_task_name(current, task_name, sizeof(task_name)) < 0) {
2488 memset(setup, 0, sizeof(setup));
2489 if (file->f_mode & FMODE_WRITE)
2490 snd_pcm_oss_look_for_setup(pcm, SNDRV_PCM_STREAM_PLAYBACK,
2491 task_name, &setup[0]);
2492 if (file->f_mode & FMODE_READ)
2493 snd_pcm_oss_look_for_setup(pcm, SNDRV_PCM_STREAM_CAPTURE,
2494 task_name, &setup[1]);
2496 nonblock = !!(file->f_flags & O_NONBLOCK);
2498 nonblock = nonblock_open;
2500 init_waitqueue_entry(&wait, current);
2501 add_wait_queue(&pcm->open_wait, &wait);
2502 mutex_lock(&pcm->open_mutex);
2504 err = snd_pcm_oss_open_file(file, pcm, &pcm_oss_file,
2505 iminor(inode), setup);
2508 if (err == -EAGAIN) {
2515 set_current_state(TASK_INTERRUPTIBLE);
2516 mutex_unlock(&pcm->open_mutex);
2518 mutex_lock(&pcm->open_mutex);
2519 if (pcm->card->shutdown) {
2523 if (signal_pending(current)) {
2528 remove_wait_queue(&pcm->open_wait, &wait);
2529 mutex_unlock(&pcm->open_mutex);
2532 snd_card_unref(pcm->card);
2536 module_put(pcm->card->module);
2538 snd_card_file_remove(pcm->card, file);
2541 snd_card_unref(pcm->card);
2545 static int snd_pcm_oss_release(struct inode *inode, struct file *file)
2547 struct snd_pcm *pcm;
2548 struct snd_pcm_substream *substream;
2549 struct snd_pcm_oss_file *pcm_oss_file;
2551 pcm_oss_file = file->private_data;
2552 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
2553 if (substream == NULL)
2554 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
2555 if (snd_BUG_ON(!substream))
2557 pcm = substream->pcm;
2558 if (!pcm->card->shutdown)
2559 snd_pcm_oss_sync(pcm_oss_file);
2560 mutex_lock(&pcm->open_mutex);
2561 snd_pcm_oss_release_file(pcm_oss_file);
2562 mutex_unlock(&pcm->open_mutex);
2563 wake_up(&pcm->open_wait);
2564 module_put(pcm->card->module);
2565 snd_card_file_remove(pcm->card, file);
2569 static long snd_pcm_oss_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
2571 struct snd_pcm_oss_file *pcm_oss_file;
2572 int __user *p = (int __user *)arg;
2575 pcm_oss_file = file->private_data;
2576 if (cmd == OSS_GETVERSION)
2577 return put_user(SNDRV_OSS_VERSION, p);
2578 if (cmd == OSS_ALSAEMULVER)
2579 return put_user(1, p);
2580 #if IS_REACHABLE(CONFIG_SND_MIXER_OSS)
2581 if (((cmd >> 8) & 0xff) == 'M') { /* mixer ioctl - for OSS compatibility */
2582 struct snd_pcm_substream *substream;
2584 for (idx = 0; idx < 2; ++idx) {
2585 substream = pcm_oss_file->streams[idx];
2586 if (substream != NULL)
2589 if (snd_BUG_ON(idx >= 2))
2591 return snd_mixer_oss_ioctl_card(substream->pcm->card, cmd, arg);
2594 if (((cmd >> 8) & 0xff) != 'P')
2597 pr_debug("pcm_oss: ioctl = 0x%x\n", cmd);
2600 case SNDCTL_DSP_RESET:
2601 return snd_pcm_oss_reset(pcm_oss_file);
2602 case SNDCTL_DSP_SYNC:
2603 return snd_pcm_oss_sync(pcm_oss_file);
2604 case SNDCTL_DSP_SPEED:
2605 if (get_user(res, p))
2607 if ((res = snd_pcm_oss_set_rate(pcm_oss_file, res))<0)
2609 return put_user(res, p);
2610 case SOUND_PCM_READ_RATE:
2611 res = snd_pcm_oss_get_rate(pcm_oss_file);
2614 return put_user(res, p);
2615 case SNDCTL_DSP_STEREO:
2616 if (get_user(res, p))
2618 res = res > 0 ? 2 : 1;
2619 if ((res = snd_pcm_oss_set_channels(pcm_oss_file, res)) < 0)
2621 return put_user(--res, p);
2622 case SNDCTL_DSP_GETBLKSIZE:
2623 res = snd_pcm_oss_get_block_size(pcm_oss_file);
2626 return put_user(res, p);
2627 case SNDCTL_DSP_SETFMT:
2628 if (get_user(res, p))
2630 res = snd_pcm_oss_set_format(pcm_oss_file, res);
2633 return put_user(res, p);
2634 case SOUND_PCM_READ_BITS:
2635 res = snd_pcm_oss_get_format(pcm_oss_file);
2638 return put_user(res, p);
2639 case SNDCTL_DSP_CHANNELS:
2640 if (get_user(res, p))
2642 res = snd_pcm_oss_set_channels(pcm_oss_file, res);
2645 return put_user(res, p);
2646 case SOUND_PCM_READ_CHANNELS:
2647 res = snd_pcm_oss_get_channels(pcm_oss_file);
2650 return put_user(res, p);
2651 case SOUND_PCM_WRITE_FILTER:
2652 case SOUND_PCM_READ_FILTER:
2654 case SNDCTL_DSP_POST:
2655 return snd_pcm_oss_post(pcm_oss_file);
2656 case SNDCTL_DSP_SUBDIVIDE:
2657 if (get_user(res, p))
2659 res = snd_pcm_oss_set_subdivide(pcm_oss_file, res);
2662 return put_user(res, p);
2663 case SNDCTL_DSP_SETFRAGMENT:
2664 if (get_user(res, p))
2666 return snd_pcm_oss_set_fragment(pcm_oss_file, res);
2667 case SNDCTL_DSP_GETFMTS:
2668 res = snd_pcm_oss_get_formats(pcm_oss_file);
2671 return put_user(res, p);
2672 case SNDCTL_DSP_GETOSPACE:
2673 case SNDCTL_DSP_GETISPACE:
2674 return snd_pcm_oss_get_space(pcm_oss_file,
2675 cmd == SNDCTL_DSP_GETISPACE ?
2676 SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK,
2677 (struct audio_buf_info __user *) arg);
2678 case SNDCTL_DSP_NONBLOCK:
2679 return snd_pcm_oss_nonblock(file);
2680 case SNDCTL_DSP_GETCAPS:
2681 res = snd_pcm_oss_get_caps(pcm_oss_file);
2684 return put_user(res, p);
2685 case SNDCTL_DSP_GETTRIGGER:
2686 res = snd_pcm_oss_get_trigger(pcm_oss_file);
2689 return put_user(res, p);
2690 case SNDCTL_DSP_SETTRIGGER:
2691 if (get_user(res, p))
2693 return snd_pcm_oss_set_trigger(pcm_oss_file, res);
2694 case SNDCTL_DSP_GETIPTR:
2695 case SNDCTL_DSP_GETOPTR:
2696 return snd_pcm_oss_get_ptr(pcm_oss_file,
2697 cmd == SNDCTL_DSP_GETIPTR ?
2698 SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK,
2699 (struct count_info __user *) arg);
2700 case SNDCTL_DSP_MAPINBUF:
2701 case SNDCTL_DSP_MAPOUTBUF:
2702 return snd_pcm_oss_get_mapbuf(pcm_oss_file,
2703 cmd == SNDCTL_DSP_MAPINBUF ?
2704 SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK,
2705 (struct buffmem_desc __user *) arg);
2706 case SNDCTL_DSP_SETSYNCRO:
2707 /* stop DMA now.. */
2709 case SNDCTL_DSP_SETDUPLEX:
2710 if (snd_pcm_oss_get_caps(pcm_oss_file) & DSP_CAP_DUPLEX)
2713 case SNDCTL_DSP_GETODELAY:
2714 res = snd_pcm_oss_get_odelay(pcm_oss_file);
2716 /* it's for sure, some broken apps don't check for error codes */
2720 return put_user(res, p);
2721 case SNDCTL_DSP_PROFILE:
2722 return 0; /* silently ignore */
2724 pr_debug("pcm_oss: unknown command = 0x%x\n", cmd);
2729 #ifdef CONFIG_COMPAT
2730 /* all compatible */
2731 static long snd_pcm_oss_ioctl_compat(struct file *file, unsigned int cmd,
2734 return snd_pcm_oss_ioctl(file, cmd, (unsigned long)compat_ptr(arg));
2737 #define snd_pcm_oss_ioctl_compat NULL
2740 static ssize_t snd_pcm_oss_read(struct file *file, char __user *buf, size_t count, loff_t *offset)
2742 struct snd_pcm_oss_file *pcm_oss_file;
2743 struct snd_pcm_substream *substream;
2745 pcm_oss_file = file->private_data;
2746 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
2747 if (substream == NULL)
2749 substream->f_flags = file->f_flags & O_NONBLOCK;
2751 return snd_pcm_oss_read1(substream, buf, count);
2754 ssize_t res = snd_pcm_oss_read1(substream, buf, count);
2755 pcm_dbg(substream->pcm,
2756 "pcm_oss: read %li bytes (returned %li bytes)\n",
2757 (long)count, (long)res);
2763 static ssize_t snd_pcm_oss_write(struct file *file, const char __user *buf, size_t count, loff_t *offset)
2765 struct snd_pcm_oss_file *pcm_oss_file;
2766 struct snd_pcm_substream *substream;
2769 pcm_oss_file = file->private_data;
2770 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
2771 if (substream == NULL)
2773 substream->f_flags = file->f_flags & O_NONBLOCK;
2774 result = snd_pcm_oss_write1(substream, buf, count);
2776 pcm_dbg(substream->pcm, "pcm_oss: write %li bytes (wrote %li bytes)\n",
2777 (long)count, (long)result);
2782 static int snd_pcm_oss_playback_ready(struct snd_pcm_substream *substream)
2784 struct snd_pcm_runtime *runtime = substream->runtime;
2785 if (atomic_read(&substream->mmap_count))
2786 return runtime->oss.prev_hw_ptr_period !=
2787 get_hw_ptr_period(runtime);
2789 return snd_pcm_playback_avail(runtime) >=
2790 runtime->oss.period_frames;
2793 static int snd_pcm_oss_capture_ready(struct snd_pcm_substream *substream)
2795 struct snd_pcm_runtime *runtime = substream->runtime;
2796 if (atomic_read(&substream->mmap_count))
2797 return runtime->oss.prev_hw_ptr_period !=
2798 get_hw_ptr_period(runtime);
2800 return snd_pcm_capture_avail(runtime) >=
2801 runtime->oss.period_frames;
2804 static __poll_t snd_pcm_oss_poll(struct file *file, poll_table * wait)
2806 struct snd_pcm_oss_file *pcm_oss_file;
2808 struct snd_pcm_substream *psubstream = NULL, *csubstream = NULL;
2810 pcm_oss_file = file->private_data;
2812 psubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
2813 csubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
2816 if (psubstream != NULL) {
2817 struct snd_pcm_runtime *runtime = psubstream->runtime;
2818 poll_wait(file, &runtime->sleep, wait);
2819 snd_pcm_stream_lock_irq(psubstream);
2820 if (runtime->status->state != SNDRV_PCM_STATE_DRAINING &&
2821 (runtime->status->state != SNDRV_PCM_STATE_RUNNING ||
2822 snd_pcm_oss_playback_ready(psubstream)))
2823 mask |= EPOLLOUT | EPOLLWRNORM;
2824 snd_pcm_stream_unlock_irq(psubstream);
2826 if (csubstream != NULL) {
2827 struct snd_pcm_runtime *runtime = csubstream->runtime;
2828 snd_pcm_state_t ostate;
2829 poll_wait(file, &runtime->sleep, wait);
2830 snd_pcm_stream_lock_irq(csubstream);
2831 if ((ostate = runtime->status->state) != SNDRV_PCM_STATE_RUNNING ||
2832 snd_pcm_oss_capture_ready(csubstream))
2833 mask |= EPOLLIN | EPOLLRDNORM;
2834 snd_pcm_stream_unlock_irq(csubstream);
2835 if (ostate != SNDRV_PCM_STATE_RUNNING && runtime->oss.trigger) {
2836 struct snd_pcm_oss_file ofile;
2837 memset(&ofile, 0, sizeof(ofile));
2838 ofile.streams[SNDRV_PCM_STREAM_CAPTURE] = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
2839 runtime->oss.trigger = 0;
2840 snd_pcm_oss_set_trigger(&ofile, PCM_ENABLE_INPUT);
2847 static int snd_pcm_oss_mmap(struct file *file, struct vm_area_struct *area)
2849 struct snd_pcm_oss_file *pcm_oss_file;
2850 struct snd_pcm_substream *substream = NULL;
2851 struct snd_pcm_runtime *runtime;
2855 pr_debug("pcm_oss: mmap begin\n");
2857 pcm_oss_file = file->private_data;
2858 switch ((area->vm_flags & (VM_READ | VM_WRITE))) {
2859 case VM_READ | VM_WRITE:
2860 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
2865 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
2868 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
2873 /* set VM_READ access as well to fix memset() routines that do
2874 reads before writes (to improve performance) */
2875 area->vm_flags |= VM_READ;
2876 if (substream == NULL)
2878 runtime = substream->runtime;
2879 if (!(runtime->info & SNDRV_PCM_INFO_MMAP_VALID))
2881 if (runtime->info & SNDRV_PCM_INFO_INTERLEAVED)
2882 runtime->access = SNDRV_PCM_ACCESS_MMAP_INTERLEAVED;
2886 if (runtime->oss.params) {
2887 /* use mutex_trylock() for params_lock for avoiding a deadlock
2888 * between mmap_sem and params_lock taken by
2889 * copy_from/to_user() in snd_pcm_oss_write/read()
2891 err = snd_pcm_oss_change_params(substream, true);
2895 #ifdef CONFIG_SND_PCM_OSS_PLUGINS
2896 if (runtime->oss.plugin_first != NULL)
2900 if (area->vm_pgoff != 0)
2903 err = snd_pcm_mmap_data(substream, file, area);
2906 runtime->oss.mmap_bytes = area->vm_end - area->vm_start;
2907 runtime->silence_threshold = 0;
2908 runtime->silence_size = 0;
2910 pr_debug("pcm_oss: mmap ok, bytes = 0x%x\n",
2911 runtime->oss.mmap_bytes);
2913 /* In mmap mode we never stop */
2914 runtime->stop_threshold = runtime->boundary;
2919 #ifdef CONFIG_SND_VERBOSE_PROCFS
2924 static void snd_pcm_oss_proc_read(struct snd_info_entry *entry,
2925 struct snd_info_buffer *buffer)
2927 struct snd_pcm_str *pstr = entry->private_data;
2928 struct snd_pcm_oss_setup *setup = pstr->oss.setup_list;
2929 mutex_lock(&pstr->oss.setup_mutex);
2931 snd_iprintf(buffer, "%s %u %u%s%s%s%s%s%s\n",
2935 setup->disable ? " disable" : "",
2936 setup->direct ? " direct" : "",
2937 setup->block ? " block" : "",
2938 setup->nonblock ? " non-block" : "",
2939 setup->partialfrag ? " partial-frag" : "",
2940 setup->nosilence ? " no-silence" : "");
2941 setup = setup->next;
2943 mutex_unlock(&pstr->oss.setup_mutex);
2946 static void snd_pcm_oss_proc_free_setup_list(struct snd_pcm_str * pstr)
2948 struct snd_pcm_oss_setup *setup, *setupn;
2950 for (setup = pstr->oss.setup_list, pstr->oss.setup_list = NULL;
2951 setup; setup = setupn) {
2952 setupn = setup->next;
2953 kfree(setup->task_name);
2956 pstr->oss.setup_list = NULL;
2959 static void snd_pcm_oss_proc_write(struct snd_info_entry *entry,
2960 struct snd_info_buffer *buffer)
2962 struct snd_pcm_str *pstr = entry->private_data;
2963 char line[128], str[32], task_name[32];
2966 struct snd_pcm_oss_setup *setup, *setup1, template;
2968 while (!snd_info_get_line(buffer, line, sizeof(line))) {
2969 mutex_lock(&pstr->oss.setup_mutex);
2970 memset(&template, 0, sizeof(template));
2971 ptr = snd_info_get_str(task_name, line, sizeof(task_name));
2972 if (!strcmp(task_name, "clear") || !strcmp(task_name, "erase")) {
2973 snd_pcm_oss_proc_free_setup_list(pstr);
2974 mutex_unlock(&pstr->oss.setup_mutex);
2977 for (setup = pstr->oss.setup_list; setup; setup = setup->next) {
2978 if (!strcmp(setup->task_name, task_name)) {
2983 ptr = snd_info_get_str(str, ptr, sizeof(str));
2984 template.periods = simple_strtoul(str, NULL, 10);
2985 ptr = snd_info_get_str(str, ptr, sizeof(str));
2986 template.period_size = simple_strtoul(str, NULL, 10);
2987 for (idx1 = 31; idx1 >= 0; idx1--)
2988 if (template.period_size & (1 << idx1))
2990 for (idx1--; idx1 >= 0; idx1--)
2991 template.period_size &= ~(1 << idx1);
2993 ptr = snd_info_get_str(str, ptr, sizeof(str));
2994 if (!strcmp(str, "disable")) {
2995 template.disable = 1;
2996 } else if (!strcmp(str, "direct")) {
2997 template.direct = 1;
2998 } else if (!strcmp(str, "block")) {
3000 } else if (!strcmp(str, "non-block")) {
3001 template.nonblock = 1;
3002 } else if (!strcmp(str, "partial-frag")) {
3003 template.partialfrag = 1;
3004 } else if (!strcmp(str, "no-silence")) {
3005 template.nosilence = 1;
3006 } else if (!strcmp(str, "buggy-ptr")) {
3007 template.buggyptr = 1;
3010 if (setup == NULL) {
3011 setup = kmalloc(sizeof(*setup), GFP_KERNEL);
3013 buffer->error = -ENOMEM;
3014 mutex_unlock(&pstr->oss.setup_mutex);
3017 if (pstr->oss.setup_list == NULL)
3018 pstr->oss.setup_list = setup;
3020 for (setup1 = pstr->oss.setup_list;
3021 setup1->next; setup1 = setup1->next);
3022 setup1->next = setup;
3024 template.task_name = kstrdup(task_name, GFP_KERNEL);
3025 if (! template.task_name) {
3027 buffer->error = -ENOMEM;
3028 mutex_unlock(&pstr->oss.setup_mutex);
3033 mutex_unlock(&pstr->oss.setup_mutex);
3037 static void snd_pcm_oss_proc_init(struct snd_pcm *pcm)
3040 for (stream = 0; stream < 2; ++stream) {
3041 struct snd_info_entry *entry;
3042 struct snd_pcm_str *pstr = &pcm->streams[stream];
3043 if (pstr->substream_count == 0)
3045 if ((entry = snd_info_create_card_entry(pcm->card, "oss", pstr->proc_root)) != NULL) {
3046 entry->content = SNDRV_INFO_CONTENT_TEXT;
3047 entry->mode = S_IFREG | 0644;
3048 entry->c.text.read = snd_pcm_oss_proc_read;
3049 entry->c.text.write = snd_pcm_oss_proc_write;
3050 entry->private_data = pstr;
3051 if (snd_info_register(entry) < 0) {
3052 snd_info_free_entry(entry);
3056 pstr->oss.proc_entry = entry;
3060 static void snd_pcm_oss_proc_done(struct snd_pcm *pcm)
3063 for (stream = 0; stream < 2; ++stream) {
3064 struct snd_pcm_str *pstr = &pcm->streams[stream];
3065 snd_info_free_entry(pstr->oss.proc_entry);
3066 pstr->oss.proc_entry = NULL;
3067 snd_pcm_oss_proc_free_setup_list(pstr);
3070 #else /* !CONFIG_SND_VERBOSE_PROCFS */
3071 #define snd_pcm_oss_proc_init(pcm)
3072 #define snd_pcm_oss_proc_done(pcm)
3073 #endif /* CONFIG_SND_VERBOSE_PROCFS */
3079 static const struct file_operations snd_pcm_oss_f_reg =
3081 .owner = THIS_MODULE,
3082 .read = snd_pcm_oss_read,
3083 .write = snd_pcm_oss_write,
3084 .open = snd_pcm_oss_open,
3085 .release = snd_pcm_oss_release,
3086 .llseek = no_llseek,
3087 .poll = snd_pcm_oss_poll,
3088 .unlocked_ioctl = snd_pcm_oss_ioctl,
3089 .compat_ioctl = snd_pcm_oss_ioctl_compat,
3090 .mmap = snd_pcm_oss_mmap,
3093 static void register_oss_dsp(struct snd_pcm *pcm, int index)
3095 if (snd_register_oss_device(SNDRV_OSS_DEVICE_TYPE_PCM,
3096 pcm->card, index, &snd_pcm_oss_f_reg,
3098 pcm_err(pcm, "unable to register OSS PCM device %i:%i\n",
3099 pcm->card->number, pcm->device);
3103 static int snd_pcm_oss_register_minor(struct snd_pcm *pcm)
3106 if (dsp_map[pcm->card->number] == (int)pcm->device) {
3109 register_oss_dsp(pcm, 0);
3110 duplex = (pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream_count > 0 &&
3111 pcm->streams[SNDRV_PCM_STREAM_CAPTURE].substream_count &&
3112 !(pcm->info_flags & SNDRV_PCM_INFO_HALF_DUPLEX));
3113 sprintf(name, "%s%s", pcm->name, duplex ? " (DUPLEX)" : "");
3114 #ifdef SNDRV_OSS_INFO_DEV_AUDIO
3115 snd_oss_info_register(SNDRV_OSS_INFO_DEV_AUDIO,
3120 pcm->oss.reg_mask |= 1;
3122 if (adsp_map[pcm->card->number] == (int)pcm->device) {
3123 register_oss_dsp(pcm, 1);
3125 pcm->oss.reg_mask |= 2;
3129 snd_pcm_oss_proc_init(pcm);
3134 static int snd_pcm_oss_disconnect_minor(struct snd_pcm *pcm)
3137 if (pcm->oss.reg_mask & 1) {
3138 pcm->oss.reg_mask &= ~1;
3139 snd_unregister_oss_device(SNDRV_OSS_DEVICE_TYPE_PCM,
3142 if (pcm->oss.reg_mask & 2) {
3143 pcm->oss.reg_mask &= ~2;
3144 snd_unregister_oss_device(SNDRV_OSS_DEVICE_TYPE_PCM,
3147 if (dsp_map[pcm->card->number] == (int)pcm->device) {
3148 #ifdef SNDRV_OSS_INFO_DEV_AUDIO
3149 snd_oss_info_unregister(SNDRV_OSS_INFO_DEV_AUDIO, pcm->card->number);
3157 static int snd_pcm_oss_unregister_minor(struct snd_pcm *pcm)
3159 snd_pcm_oss_disconnect_minor(pcm);
3160 snd_pcm_oss_proc_done(pcm);
3164 static struct snd_pcm_notify snd_pcm_oss_notify =
3166 .n_register = snd_pcm_oss_register_minor,
3167 .n_disconnect = snd_pcm_oss_disconnect_minor,
3168 .n_unregister = snd_pcm_oss_unregister_minor,
3171 static int __init alsa_pcm_oss_init(void)
3176 /* check device map table */
3177 for (i = 0; i < SNDRV_CARDS; i++) {
3178 if (dsp_map[i] < 0 || dsp_map[i] >= SNDRV_PCM_DEVICES) {
3179 pr_err("ALSA: pcm_oss: invalid dsp_map[%d] = %d\n",
3183 if (adsp_map[i] < 0 || adsp_map[i] >= SNDRV_PCM_DEVICES) {
3184 pr_err("ALSA: pcm_oss: invalid adsp_map[%d] = %d\n",
3189 if ((err = snd_pcm_notify(&snd_pcm_oss_notify, 0)) < 0)
3194 static void __exit alsa_pcm_oss_exit(void)
3196 snd_pcm_notify(&snd_pcm_oss_notify, 1);
3199 module_init(alsa_pcm_oss_init)
3200 module_exit(alsa_pcm_oss_exit)