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)
792 runtime->oss.period_bytes = oss_period_size;
793 runtime->oss.period_frames = 1;
794 runtime->oss.periods = oss_periods;
798 static int choose_rate(struct snd_pcm_substream *substream,
799 struct snd_pcm_hw_params *params, unsigned int best_rate)
801 const struct snd_interval *it;
802 struct snd_pcm_hw_params *save;
803 unsigned int rate, prev;
805 save = kmalloc(sizeof(*save), GFP_KERNEL);
809 it = hw_param_interval_c(save, SNDRV_PCM_HW_PARAM_RATE);
811 /* try multiples of the best rate */
814 if (it->max < rate || (it->max == rate && it->openmax))
816 if (it->min < rate || (it->min == rate && !it->openmin)) {
818 ret = snd_pcm_hw_param_set(substream, params,
819 SNDRV_PCM_HW_PARAM_RATE,
821 if (ret == (int)rate) {
833 /* not found, use the nearest rate */
835 return snd_pcm_hw_param_near(substream, params, SNDRV_PCM_HW_PARAM_RATE, best_rate, NULL);
838 /* parameter locking: returns immediately if tried during streaming */
839 static int lock_params(struct snd_pcm_runtime *runtime)
841 if (mutex_lock_interruptible(&runtime->oss.params_lock))
843 if (atomic_read(&runtime->oss.rw_ref)) {
844 mutex_unlock(&runtime->oss.params_lock);
850 static void unlock_params(struct snd_pcm_runtime *runtime)
852 mutex_unlock(&runtime->oss.params_lock);
855 /* call with params_lock held */
856 static int snd_pcm_oss_change_params_locked(struct snd_pcm_substream *substream)
858 struct snd_pcm_runtime *runtime = substream->runtime;
859 struct snd_pcm_hw_params *params, *sparams;
860 struct snd_pcm_sw_params *sw_params;
861 ssize_t oss_buffer_size, oss_period_size;
862 size_t oss_frame_size;
865 snd_pcm_format_t format, sformat;
867 const struct snd_mask *sformat_mask;
868 struct snd_mask mask;
870 if (!runtime->oss.params)
872 sw_params = kzalloc(sizeof(*sw_params), GFP_KERNEL);
873 params = kmalloc(sizeof(*params), GFP_KERNEL);
874 sparams = kmalloc(sizeof(*sparams), GFP_KERNEL);
875 if (!sw_params || !params || !sparams) {
880 if (atomic_read(&substream->mmap_count))
883 direct = substream->oss.setup.direct;
885 _snd_pcm_hw_params_any(sparams);
886 _snd_pcm_hw_param_setinteger(sparams, SNDRV_PCM_HW_PARAM_PERIODS);
887 _snd_pcm_hw_param_min(sparams, SNDRV_PCM_HW_PARAM_PERIODS, 2, 0);
888 snd_mask_none(&mask);
889 if (atomic_read(&substream->mmap_count))
890 snd_mask_set(&mask, (__force int)SNDRV_PCM_ACCESS_MMAP_INTERLEAVED);
892 snd_mask_set(&mask, (__force int)SNDRV_PCM_ACCESS_RW_INTERLEAVED);
894 snd_mask_set(&mask, (__force int)SNDRV_PCM_ACCESS_RW_NONINTERLEAVED);
896 err = snd_pcm_hw_param_mask(substream, sparams, SNDRV_PCM_HW_PARAM_ACCESS, &mask);
898 pcm_dbg(substream->pcm, "No usable accesses\n");
903 err = choose_rate(substream, sparams, runtime->oss.rate);
906 err = snd_pcm_hw_param_near(substream, sparams,
907 SNDRV_PCM_HW_PARAM_CHANNELS,
908 runtime->oss.channels, NULL);
912 format = snd_pcm_oss_format_from(runtime->oss.format);
914 sformat_mask = hw_param_mask_c(sparams, SNDRV_PCM_HW_PARAM_FORMAT);
918 sformat = snd_pcm_plug_slave_format(format, sformat_mask);
920 if ((__force int)sformat < 0 ||
921 !snd_mask_test(sformat_mask, (__force int)sformat)) {
922 for (sformat = (__force snd_pcm_format_t)0;
923 (__force int)sformat <= (__force int)SNDRV_PCM_FORMAT_LAST;
924 sformat = (__force snd_pcm_format_t)((__force int)sformat + 1)) {
925 if (snd_mask_test(sformat_mask, (__force int)sformat) &&
926 snd_pcm_oss_format_to(sformat) >= 0)
929 if ((__force int)sformat > (__force int)SNDRV_PCM_FORMAT_LAST) {
930 pcm_dbg(substream->pcm, "Cannot find a format!!!\n");
935 err = _snd_pcm_hw_param_set(sparams, SNDRV_PCM_HW_PARAM_FORMAT, (__force int)sformat, 0);
940 memcpy(params, sparams, sizeof(*params));
942 _snd_pcm_hw_params_any(params);
943 _snd_pcm_hw_param_set(params, SNDRV_PCM_HW_PARAM_ACCESS,
944 (__force int)SNDRV_PCM_ACCESS_RW_INTERLEAVED, 0);
945 _snd_pcm_hw_param_set(params, SNDRV_PCM_HW_PARAM_FORMAT,
946 (__force int)snd_pcm_oss_format_from(runtime->oss.format), 0);
947 _snd_pcm_hw_param_set(params, SNDRV_PCM_HW_PARAM_CHANNELS,
948 runtime->oss.channels, 0);
949 _snd_pcm_hw_param_set(params, SNDRV_PCM_HW_PARAM_RATE,
950 runtime->oss.rate, 0);
951 pdprintf("client: access = %i, format = %i, channels = %i, rate = %i\n",
952 params_access(params), params_format(params),
953 params_channels(params), params_rate(params));
955 pdprintf("slave: access = %i, format = %i, channels = %i, rate = %i\n",
956 params_access(sparams), params_format(sparams),
957 params_channels(sparams), params_rate(sparams));
959 oss_frame_size = snd_pcm_format_physical_width(params_format(params)) *
960 params_channels(params) / 8;
962 err = snd_pcm_oss_period_size(substream, params, sparams);
966 n = snd_pcm_plug_slave_size(substream, runtime->oss.period_bytes / oss_frame_size);
967 err = snd_pcm_hw_param_near(substream, sparams, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, n, NULL);
971 err = snd_pcm_hw_param_near(substream, sparams, SNDRV_PCM_HW_PARAM_PERIODS,
972 runtime->oss.periods, NULL);
976 snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DROP, NULL);
978 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_HW_PARAMS, sparams);
980 pcm_dbg(substream->pcm, "HW_PARAMS failed: %i\n", err);
984 #ifdef CONFIG_SND_PCM_OSS_PLUGINS
985 snd_pcm_oss_plugin_clear(substream);
987 /* add necessary plugins */
988 snd_pcm_oss_plugin_clear(substream);
989 if ((err = snd_pcm_plug_format_plugins(substream,
992 pcm_dbg(substream->pcm,
993 "snd_pcm_plug_format_plugins failed: %i\n", err);
994 snd_pcm_oss_plugin_clear(substream);
997 if (runtime->oss.plugin_first) {
998 struct snd_pcm_plugin *plugin;
999 if ((err = snd_pcm_plugin_build_io(substream, sparams, &plugin)) < 0) {
1000 pcm_dbg(substream->pcm,
1001 "snd_pcm_plugin_build_io failed: %i\n", err);
1002 snd_pcm_oss_plugin_clear(substream);
1005 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
1006 err = snd_pcm_plugin_append(plugin);
1008 err = snd_pcm_plugin_insert(plugin);
1011 snd_pcm_oss_plugin_clear(substream);
1018 if (runtime->oss.trigger) {
1019 sw_params->start_threshold = 1;
1021 sw_params->start_threshold = runtime->boundary;
1023 if (atomic_read(&substream->mmap_count) ||
1024 substream->stream == SNDRV_PCM_STREAM_CAPTURE)
1025 sw_params->stop_threshold = runtime->boundary;
1027 sw_params->stop_threshold = runtime->buffer_size;
1028 sw_params->tstamp_mode = SNDRV_PCM_TSTAMP_NONE;
1029 sw_params->period_step = 1;
1030 sw_params->avail_min = substream->stream == SNDRV_PCM_STREAM_PLAYBACK ?
1031 1 : runtime->period_size;
1032 if (atomic_read(&substream->mmap_count) ||
1033 substream->oss.setup.nosilence) {
1034 sw_params->silence_threshold = 0;
1035 sw_params->silence_size = 0;
1037 snd_pcm_uframes_t frames;
1038 frames = runtime->period_size + 16;
1039 if (frames > runtime->buffer_size)
1040 frames = runtime->buffer_size;
1041 sw_params->silence_threshold = frames;
1042 sw_params->silence_size = frames;
1045 if ((err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_SW_PARAMS, sw_params)) < 0) {
1046 pcm_dbg(substream->pcm, "SW_PARAMS failed: %i\n", err);
1050 runtime->oss.periods = params_periods(sparams);
1051 oss_period_size = snd_pcm_plug_client_size(substream, params_period_size(sparams));
1052 if (oss_period_size < 0) {
1056 #ifdef CONFIG_SND_PCM_OSS_PLUGINS
1057 if (runtime->oss.plugin_first) {
1058 err = snd_pcm_plug_alloc(substream, oss_period_size);
1063 oss_period_size *= oss_frame_size;
1065 oss_buffer_size = oss_period_size * runtime->oss.periods;
1066 if (oss_buffer_size < 0) {
1071 runtime->oss.period_bytes = oss_period_size;
1072 runtime->oss.buffer_bytes = oss_buffer_size;
1074 pdprintf("oss: period bytes = %i, buffer bytes = %i\n",
1075 runtime->oss.period_bytes,
1076 runtime->oss.buffer_bytes);
1077 pdprintf("slave: period_size = %i, buffer_size = %i\n",
1078 params_period_size(sparams),
1079 params_buffer_size(sparams));
1081 runtime->oss.format = snd_pcm_oss_format_to(params_format(params));
1082 runtime->oss.channels = params_channels(params);
1083 runtime->oss.rate = params_rate(params);
1085 kvfree(runtime->oss.buffer);
1086 runtime->oss.buffer = kvzalloc(runtime->oss.period_bytes, GFP_KERNEL);
1087 if (!runtime->oss.buffer) {
1092 runtime->oss.params = 0;
1093 runtime->oss.prepare = 1;
1094 runtime->oss.buffer_used = 0;
1095 if (runtime->dma_area)
1096 snd_pcm_format_set_silence(runtime->format, runtime->dma_area, bytes_to_samples(runtime, runtime->dma_bytes));
1098 runtime->oss.period_frames = snd_pcm_alsa_frames(substream, oss_period_size);
1108 /* this one takes the lock by itself */
1109 static int snd_pcm_oss_change_params(struct snd_pcm_substream *substream,
1112 struct snd_pcm_runtime *runtime = substream->runtime;
1116 if (!(mutex_trylock(&runtime->oss.params_lock)))
1118 } else if (mutex_lock_interruptible(&runtime->oss.params_lock))
1119 return -ERESTARTSYS;
1121 err = snd_pcm_oss_change_params_locked(substream);
1122 mutex_unlock(&runtime->oss.params_lock);
1126 static int snd_pcm_oss_get_active_substream(struct snd_pcm_oss_file *pcm_oss_file, struct snd_pcm_substream **r_substream)
1129 struct snd_pcm_substream *asubstream = NULL, *substream;
1131 for (idx = 0; idx < 2; idx++) {
1132 substream = pcm_oss_file->streams[idx];
1133 if (substream == NULL)
1135 if (asubstream == NULL)
1136 asubstream = substream;
1137 if (substream->runtime->oss.params) {
1138 err = snd_pcm_oss_change_params(substream, false);
1146 *r_substream = asubstream;
1150 /* call with params_lock held */
1151 /* NOTE: this always call PREPARE unconditionally no matter whether
1152 * runtime->oss.prepare is set or not
1154 static int snd_pcm_oss_prepare(struct snd_pcm_substream *substream)
1157 struct snd_pcm_runtime *runtime = substream->runtime;
1159 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_PREPARE, NULL);
1161 pcm_dbg(substream->pcm,
1162 "snd_pcm_oss_prepare: SNDRV_PCM_IOCTL_PREPARE failed\n");
1165 runtime->oss.prepare = 0;
1166 runtime->oss.prev_hw_ptr_period = 0;
1167 runtime->oss.period_ptr = 0;
1168 runtime->oss.buffer_used = 0;
1173 static int snd_pcm_oss_make_ready(struct snd_pcm_substream *substream)
1175 struct snd_pcm_runtime *runtime;
1178 runtime = substream->runtime;
1179 if (runtime->oss.params) {
1180 err = snd_pcm_oss_change_params(substream, false);
1184 if (runtime->oss.prepare) {
1185 if (mutex_lock_interruptible(&runtime->oss.params_lock))
1186 return -ERESTARTSYS;
1187 err = snd_pcm_oss_prepare(substream);
1188 mutex_unlock(&runtime->oss.params_lock);
1195 /* call with params_lock held */
1196 static int snd_pcm_oss_make_ready_locked(struct snd_pcm_substream *substream)
1198 struct snd_pcm_runtime *runtime;
1201 runtime = substream->runtime;
1202 if (runtime->oss.params) {
1203 err = snd_pcm_oss_change_params_locked(substream);
1207 if (runtime->oss.prepare) {
1208 err = snd_pcm_oss_prepare(substream);
1215 static int snd_pcm_oss_capture_position_fixup(struct snd_pcm_substream *substream, snd_pcm_sframes_t *delay)
1217 struct snd_pcm_runtime *runtime;
1218 snd_pcm_uframes_t frames;
1222 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DELAY, delay);
1225 runtime = substream->runtime;
1226 if (*delay <= (snd_pcm_sframes_t)runtime->buffer_size)
1228 /* in case of overrun, skip whole periods like OSS/Linux driver does */
1229 /* until avail(delay) <= buffer_size */
1230 frames = (*delay - runtime->buffer_size) + runtime->period_size - 1;
1231 frames /= runtime->period_size;
1232 frames *= runtime->period_size;
1233 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_FORWARD, &frames);
1240 snd_pcm_sframes_t snd_pcm_oss_write3(struct snd_pcm_substream *substream, const char *ptr, snd_pcm_uframes_t frames, int in_kernel)
1242 struct snd_pcm_runtime *runtime = substream->runtime;
1245 if (runtime->status->state == SNDRV_PCM_STATE_XRUN ||
1246 runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) {
1248 pcm_dbg(substream->pcm,
1249 "pcm_oss: write: recovering from %s\n",
1250 runtime->status->state == SNDRV_PCM_STATE_XRUN ?
1251 "XRUN" : "SUSPEND");
1253 ret = snd_pcm_oss_prepare(substream);
1257 ret = __snd_pcm_lib_xfer(substream, (void *)ptr, true,
1259 if (ret != -EPIPE && ret != -ESTRPIPE)
1261 /* test, if we can't store new data, because the stream */
1262 /* has not been started */
1263 if (runtime->status->state == SNDRV_PCM_STATE_PREPARED)
1269 snd_pcm_sframes_t snd_pcm_oss_read3(struct snd_pcm_substream *substream, char *ptr, snd_pcm_uframes_t frames, int in_kernel)
1271 struct snd_pcm_runtime *runtime = substream->runtime;
1272 snd_pcm_sframes_t delay;
1275 if (runtime->status->state == SNDRV_PCM_STATE_XRUN ||
1276 runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) {
1278 pcm_dbg(substream->pcm,
1279 "pcm_oss: read: recovering from %s\n",
1280 runtime->status->state == SNDRV_PCM_STATE_XRUN ?
1281 "XRUN" : "SUSPEND");
1283 ret = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DRAIN, NULL);
1286 } else if (runtime->status->state == SNDRV_PCM_STATE_SETUP) {
1287 ret = snd_pcm_oss_prepare(substream);
1291 ret = snd_pcm_oss_capture_position_fixup(substream, &delay);
1294 ret = __snd_pcm_lib_xfer(substream, (void *)ptr, true,
1296 if (ret == -EPIPE) {
1297 if (runtime->status->state == SNDRV_PCM_STATE_DRAINING) {
1298 ret = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DROP, NULL);
1304 if (ret != -ESTRPIPE)
1310 #ifdef CONFIG_SND_PCM_OSS_PLUGINS
1311 snd_pcm_sframes_t snd_pcm_oss_writev3(struct snd_pcm_substream *substream, void **bufs, snd_pcm_uframes_t frames)
1313 struct snd_pcm_runtime *runtime = substream->runtime;
1316 if (runtime->status->state == SNDRV_PCM_STATE_XRUN ||
1317 runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) {
1319 pcm_dbg(substream->pcm,
1320 "pcm_oss: writev: recovering from %s\n",
1321 runtime->status->state == SNDRV_PCM_STATE_XRUN ?
1322 "XRUN" : "SUSPEND");
1324 ret = snd_pcm_oss_prepare(substream);
1328 ret = snd_pcm_kernel_writev(substream, bufs, frames);
1329 if (ret != -EPIPE && ret != -ESTRPIPE)
1332 /* test, if we can't store new data, because the stream */
1333 /* has not been started */
1334 if (runtime->status->state == SNDRV_PCM_STATE_PREPARED)
1340 snd_pcm_sframes_t snd_pcm_oss_readv3(struct snd_pcm_substream *substream, void **bufs, snd_pcm_uframes_t frames)
1342 struct snd_pcm_runtime *runtime = substream->runtime;
1345 if (runtime->status->state == SNDRV_PCM_STATE_XRUN ||
1346 runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) {
1348 pcm_dbg(substream->pcm,
1349 "pcm_oss: readv: recovering from %s\n",
1350 runtime->status->state == SNDRV_PCM_STATE_XRUN ?
1351 "XRUN" : "SUSPEND");
1353 ret = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DRAIN, NULL);
1356 } else if (runtime->status->state == SNDRV_PCM_STATE_SETUP) {
1357 ret = snd_pcm_oss_prepare(substream);
1361 ret = snd_pcm_kernel_readv(substream, bufs, frames);
1362 if (ret != -EPIPE && ret != -ESTRPIPE)
1367 #endif /* CONFIG_SND_PCM_OSS_PLUGINS */
1369 static ssize_t snd_pcm_oss_write2(struct snd_pcm_substream *substream, const char *buf, size_t bytes, int in_kernel)
1371 struct snd_pcm_runtime *runtime = substream->runtime;
1372 snd_pcm_sframes_t frames, frames1;
1373 #ifdef CONFIG_SND_PCM_OSS_PLUGINS
1374 if (runtime->oss.plugin_first) {
1375 struct snd_pcm_plugin_channel *channels;
1376 size_t oss_frame_bytes = (runtime->oss.plugin_first->src_width * runtime->oss.plugin_first->src_format.channels) / 8;
1378 if (copy_from_user(runtime->oss.buffer, (const char __force __user *)buf, bytes))
1380 buf = runtime->oss.buffer;
1382 frames = bytes / oss_frame_bytes;
1383 frames1 = snd_pcm_plug_client_channels_buf(substream, (char *)buf, frames, &channels);
1386 frames1 = snd_pcm_plug_write_transfer(substream, channels, frames1);
1389 bytes = frames1 * oss_frame_bytes;
1393 frames = bytes_to_frames(runtime, bytes);
1394 frames1 = snd_pcm_oss_write3(substream, buf, frames, in_kernel);
1397 bytes = frames_to_bytes(runtime, frames1);
1402 static ssize_t snd_pcm_oss_write1(struct snd_pcm_substream *substream, const char __user *buf, size_t bytes)
1406 struct snd_pcm_runtime *runtime = substream->runtime;
1408 if (atomic_read(&substream->mmap_count))
1411 atomic_inc(&runtime->oss.rw_ref);
1413 if (mutex_lock_interruptible(&runtime->oss.params_lock)) {
1417 tmp = snd_pcm_oss_make_ready_locked(substream);
1420 if (bytes < runtime->oss.period_bytes || runtime->oss.buffer_used > 0) {
1422 if (tmp + runtime->oss.buffer_used > runtime->oss.period_bytes)
1423 tmp = runtime->oss.period_bytes - runtime->oss.buffer_used;
1425 if (copy_from_user(runtime->oss.buffer + runtime->oss.buffer_used, buf, tmp)) {
1430 runtime->oss.buffer_used += tmp;
1434 if (substream->oss.setup.partialfrag ||
1435 runtime->oss.buffer_used == runtime->oss.period_bytes) {
1436 tmp = snd_pcm_oss_write2(substream, runtime->oss.buffer + runtime->oss.period_ptr,
1437 runtime->oss.buffer_used - runtime->oss.period_ptr, 1);
1440 runtime->oss.bytes += tmp;
1441 runtime->oss.period_ptr += tmp;
1442 runtime->oss.period_ptr %= runtime->oss.period_bytes;
1443 if (runtime->oss.period_ptr == 0 ||
1444 runtime->oss.period_ptr == runtime->oss.buffer_used)
1445 runtime->oss.buffer_used = 0;
1446 else if ((substream->f_flags & O_NONBLOCK) != 0) {
1452 tmp = snd_pcm_oss_write2(substream,
1453 (const char __force *)buf,
1454 runtime->oss.period_bytes, 0);
1457 runtime->oss.bytes += tmp;
1461 if ((substream->f_flags & O_NONBLOCK) != 0 &&
1462 tmp != runtime->oss.period_bytes)
1466 mutex_unlock(&runtime->oss.params_lock);
1469 if (signal_pending(current)) {
1475 atomic_dec(&runtime->oss.rw_ref);
1476 return xfer > 0 ? (snd_pcm_sframes_t)xfer : tmp;
1479 static ssize_t snd_pcm_oss_read2(struct snd_pcm_substream *substream, char *buf, size_t bytes, int in_kernel)
1481 struct snd_pcm_runtime *runtime = substream->runtime;
1482 snd_pcm_sframes_t frames, frames1;
1483 #ifdef CONFIG_SND_PCM_OSS_PLUGINS
1484 char __user *final_dst = (char __force __user *)buf;
1485 if (runtime->oss.plugin_first) {
1486 struct snd_pcm_plugin_channel *channels;
1487 size_t oss_frame_bytes = (runtime->oss.plugin_last->dst_width * runtime->oss.plugin_last->dst_format.channels) / 8;
1489 buf = runtime->oss.buffer;
1490 frames = bytes / oss_frame_bytes;
1491 frames1 = snd_pcm_plug_client_channels_buf(substream, buf, frames, &channels);
1494 frames1 = snd_pcm_plug_read_transfer(substream, channels, frames1);
1497 bytes = frames1 * oss_frame_bytes;
1498 if (!in_kernel && copy_to_user(final_dst, buf, bytes))
1503 frames = bytes_to_frames(runtime, bytes);
1504 frames1 = snd_pcm_oss_read3(substream, buf, frames, in_kernel);
1507 bytes = frames_to_bytes(runtime, frames1);
1512 static ssize_t snd_pcm_oss_read1(struct snd_pcm_substream *substream, char __user *buf, size_t bytes)
1516 struct snd_pcm_runtime *runtime = substream->runtime;
1518 if (atomic_read(&substream->mmap_count))
1521 atomic_inc(&runtime->oss.rw_ref);
1523 if (mutex_lock_interruptible(&runtime->oss.params_lock)) {
1527 tmp = snd_pcm_oss_make_ready_locked(substream);
1530 if (bytes < runtime->oss.period_bytes || runtime->oss.buffer_used > 0) {
1531 if (runtime->oss.buffer_used == 0) {
1532 tmp = snd_pcm_oss_read2(substream, runtime->oss.buffer, runtime->oss.period_bytes, 1);
1535 runtime->oss.bytes += tmp;
1536 runtime->oss.period_ptr = tmp;
1537 runtime->oss.buffer_used = tmp;
1540 if ((size_t) tmp > runtime->oss.buffer_used)
1541 tmp = runtime->oss.buffer_used;
1542 if (copy_to_user(buf, runtime->oss.buffer + (runtime->oss.period_ptr - runtime->oss.buffer_used), tmp)) {
1549 runtime->oss.buffer_used -= tmp;
1551 tmp = snd_pcm_oss_read2(substream, (char __force *)buf,
1552 runtime->oss.period_bytes, 0);
1555 runtime->oss.bytes += tmp;
1561 mutex_unlock(&runtime->oss.params_lock);
1564 if (signal_pending(current)) {
1570 atomic_dec(&runtime->oss.rw_ref);
1571 return xfer > 0 ? (snd_pcm_sframes_t)xfer : tmp;
1574 static int snd_pcm_oss_reset(struct snd_pcm_oss_file *pcm_oss_file)
1576 struct snd_pcm_substream *substream;
1577 struct snd_pcm_runtime *runtime;
1580 for (i = 0; i < 2; i++) {
1581 substream = pcm_oss_file->streams[i];
1584 runtime = substream->runtime;
1585 snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DROP, NULL);
1586 mutex_lock(&runtime->oss.params_lock);
1587 runtime->oss.prepare = 1;
1588 runtime->oss.buffer_used = 0;
1589 runtime->oss.prev_hw_ptr_period = 0;
1590 runtime->oss.period_ptr = 0;
1591 mutex_unlock(&runtime->oss.params_lock);
1596 static int snd_pcm_oss_post(struct snd_pcm_oss_file *pcm_oss_file)
1598 struct snd_pcm_substream *substream;
1601 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
1602 if (substream != NULL) {
1603 if ((err = snd_pcm_oss_make_ready(substream)) < 0)
1605 snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_START, NULL);
1607 /* note: all errors from the start action are ignored */
1608 /* OSS apps do not know, how to handle them */
1612 static int snd_pcm_oss_sync1(struct snd_pcm_substream *substream, size_t size)
1614 struct snd_pcm_runtime *runtime;
1616 snd_pcm_state_t state;
1618 wait_queue_entry_t wait;
1620 runtime = substream->runtime;
1621 init_waitqueue_entry(&wait, current);
1622 add_wait_queue(&runtime->sleep, &wait);
1624 pcm_dbg(substream->pcm, "sync1: size = %li\n", size);
1627 result = snd_pcm_oss_write2(substream, runtime->oss.buffer, size, 1);
1629 runtime->oss.buffer_used = 0;
1633 if (result != 0 && result != -EAGAIN)
1636 set_current_state(TASK_INTERRUPTIBLE);
1637 snd_pcm_stream_lock_irq(substream);
1638 state = runtime->status->state;
1639 snd_pcm_stream_unlock_irq(substream);
1640 if (state != SNDRV_PCM_STATE_RUNNING) {
1641 set_current_state(TASK_RUNNING);
1644 res = schedule_timeout(10 * HZ);
1645 if (signal_pending(current)) {
1646 result = -ERESTARTSYS;
1650 pcm_err(substream->pcm,
1651 "OSS sync error - DMA timeout\n");
1656 remove_wait_queue(&runtime->sleep, &wait);
1660 static int snd_pcm_oss_sync(struct snd_pcm_oss_file *pcm_oss_file)
1663 unsigned int saved_f_flags;
1664 struct snd_pcm_substream *substream;
1665 struct snd_pcm_runtime *runtime;
1666 snd_pcm_format_t format;
1667 unsigned long width;
1670 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
1671 if (substream != NULL) {
1672 runtime = substream->runtime;
1673 if (atomic_read(&substream->mmap_count))
1675 if ((err = snd_pcm_oss_make_ready(substream)) < 0)
1677 atomic_inc(&runtime->oss.rw_ref);
1678 if (mutex_lock_interruptible(&runtime->oss.params_lock)) {
1679 atomic_dec(&runtime->oss.rw_ref);
1680 return -ERESTARTSYS;
1682 format = snd_pcm_oss_format_from(runtime->oss.format);
1683 width = snd_pcm_format_physical_width(format);
1684 if (runtime->oss.buffer_used > 0) {
1686 pcm_dbg(substream->pcm, "sync: buffer_used\n");
1688 size = (8 * (runtime->oss.period_bytes - runtime->oss.buffer_used) + 7) / width;
1689 snd_pcm_format_set_silence(format,
1690 runtime->oss.buffer + runtime->oss.buffer_used,
1692 err = snd_pcm_oss_sync1(substream, runtime->oss.period_bytes);
1695 } else if (runtime->oss.period_ptr > 0) {
1697 pcm_dbg(substream->pcm, "sync: period_ptr\n");
1699 size = runtime->oss.period_bytes - runtime->oss.period_ptr;
1700 snd_pcm_format_set_silence(format,
1701 runtime->oss.buffer,
1703 err = snd_pcm_oss_sync1(substream, size);
1708 * The ALSA's period might be a bit large than OSS one.
1709 * Fill the remain portion of ALSA period with zeros.
1711 size = runtime->control->appl_ptr % runtime->period_size;
1713 size = runtime->period_size - size;
1714 if (runtime->access == SNDRV_PCM_ACCESS_RW_INTERLEAVED)
1715 snd_pcm_lib_write(substream, NULL, size);
1716 else if (runtime->access == SNDRV_PCM_ACCESS_RW_NONINTERLEAVED)
1717 snd_pcm_lib_writev(substream, NULL, size);
1720 mutex_unlock(&runtime->oss.params_lock);
1721 atomic_dec(&runtime->oss.rw_ref);
1725 * finish sync: drain the buffer
1728 saved_f_flags = substream->f_flags;
1729 substream->f_flags &= ~O_NONBLOCK;
1730 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DRAIN, NULL);
1731 substream->f_flags = saved_f_flags;
1734 mutex_lock(&runtime->oss.params_lock);
1735 runtime->oss.prepare = 1;
1736 mutex_unlock(&runtime->oss.params_lock);
1739 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
1740 if (substream != NULL) {
1741 if ((err = snd_pcm_oss_make_ready(substream)) < 0)
1743 runtime = substream->runtime;
1744 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DROP, NULL);
1747 mutex_lock(&runtime->oss.params_lock);
1748 runtime->oss.buffer_used = 0;
1749 runtime->oss.prepare = 1;
1750 mutex_unlock(&runtime->oss.params_lock);
1755 static int snd_pcm_oss_set_rate(struct snd_pcm_oss_file *pcm_oss_file, int rate)
1759 for (idx = 1; idx >= 0; --idx) {
1760 struct snd_pcm_substream *substream = pcm_oss_file->streams[idx];
1761 struct snd_pcm_runtime *runtime;
1764 if (substream == NULL)
1766 runtime = substream->runtime;
1769 else if (rate > 192000)
1771 err = lock_params(runtime);
1774 if (runtime->oss.rate != rate) {
1775 runtime->oss.params = 1;
1776 runtime->oss.rate = rate;
1778 unlock_params(runtime);
1780 return snd_pcm_oss_get_rate(pcm_oss_file);
1783 static int snd_pcm_oss_get_rate(struct snd_pcm_oss_file *pcm_oss_file)
1785 struct snd_pcm_substream *substream;
1788 if ((err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream)) < 0)
1790 return substream->runtime->oss.rate;
1793 static int snd_pcm_oss_set_channels(struct snd_pcm_oss_file *pcm_oss_file, unsigned int channels)
1800 for (idx = 1; idx >= 0; --idx) {
1801 struct snd_pcm_substream *substream = pcm_oss_file->streams[idx];
1802 struct snd_pcm_runtime *runtime;
1805 if (substream == NULL)
1807 runtime = substream->runtime;
1808 err = lock_params(runtime);
1811 if (runtime->oss.channels != channels) {
1812 runtime->oss.params = 1;
1813 runtime->oss.channels = channels;
1815 unlock_params(runtime);
1817 return snd_pcm_oss_get_channels(pcm_oss_file);
1820 static int snd_pcm_oss_get_channels(struct snd_pcm_oss_file *pcm_oss_file)
1822 struct snd_pcm_substream *substream;
1825 if ((err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream)) < 0)
1827 return substream->runtime->oss.channels;
1830 static int snd_pcm_oss_get_block_size(struct snd_pcm_oss_file *pcm_oss_file)
1832 struct snd_pcm_substream *substream;
1835 if ((err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream)) < 0)
1837 return substream->runtime->oss.period_bytes;
1840 static int snd_pcm_oss_get_formats(struct snd_pcm_oss_file *pcm_oss_file)
1842 struct snd_pcm_substream *substream;
1845 struct snd_pcm_hw_params *params;
1846 unsigned int formats = 0;
1847 const struct snd_mask *format_mask;
1850 if ((err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream)) < 0)
1852 if (atomic_read(&substream->mmap_count))
1855 direct = substream->oss.setup.direct;
1857 return AFMT_MU_LAW | AFMT_U8 |
1858 AFMT_S16_LE | AFMT_S16_BE |
1859 AFMT_S8 | AFMT_U16_LE |
1861 AFMT_S32_LE | AFMT_S32_BE |
1862 AFMT_S24_LE | AFMT_S24_BE |
1864 params = kmalloc(sizeof(*params), GFP_KERNEL);
1867 _snd_pcm_hw_params_any(params);
1868 err = snd_pcm_hw_refine(substream, params);
1871 format_mask = hw_param_mask_c(params, SNDRV_PCM_HW_PARAM_FORMAT);
1872 for (fmt = 0; fmt < 32; ++fmt) {
1873 if (snd_mask_test(format_mask, fmt)) {
1874 int f = snd_pcm_oss_format_to(fmt);
1882 return err < 0 ? err : formats;
1885 static int snd_pcm_oss_set_format(struct snd_pcm_oss_file *pcm_oss_file, int format)
1890 if (format != AFMT_QUERY) {
1891 formats = snd_pcm_oss_get_formats(pcm_oss_file);
1894 if (!(formats & format))
1896 for (idx = 1; idx >= 0; --idx) {
1897 struct snd_pcm_substream *substream = pcm_oss_file->streams[idx];
1898 struct snd_pcm_runtime *runtime;
1899 if (substream == NULL)
1901 runtime = substream->runtime;
1902 err = lock_params(runtime);
1905 if (runtime->oss.format != format) {
1906 runtime->oss.params = 1;
1907 runtime->oss.format = format;
1909 unlock_params(runtime);
1912 return snd_pcm_oss_get_format(pcm_oss_file);
1915 static int snd_pcm_oss_get_format(struct snd_pcm_oss_file *pcm_oss_file)
1917 struct snd_pcm_substream *substream;
1920 if ((err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream)) < 0)
1922 return substream->runtime->oss.format;
1925 static int snd_pcm_oss_set_subdivide1(struct snd_pcm_substream *substream, int subdivide)
1927 struct snd_pcm_runtime *runtime;
1929 runtime = substream->runtime;
1930 if (subdivide == 0) {
1931 subdivide = runtime->oss.subdivision;
1936 if (runtime->oss.subdivision || runtime->oss.fragshift)
1938 if (subdivide != 1 && subdivide != 2 && subdivide != 4 &&
1939 subdivide != 8 && subdivide != 16)
1941 runtime->oss.subdivision = subdivide;
1942 runtime->oss.params = 1;
1946 static int snd_pcm_oss_set_subdivide(struct snd_pcm_oss_file *pcm_oss_file, int subdivide)
1948 int err = -EINVAL, idx;
1950 for (idx = 1; idx >= 0; --idx) {
1951 struct snd_pcm_substream *substream = pcm_oss_file->streams[idx];
1952 struct snd_pcm_runtime *runtime;
1954 if (substream == NULL)
1956 runtime = substream->runtime;
1957 err = lock_params(runtime);
1960 err = snd_pcm_oss_set_subdivide1(substream, subdivide);
1961 unlock_params(runtime);
1968 static int snd_pcm_oss_set_fragment1(struct snd_pcm_substream *substream, unsigned int val)
1970 struct snd_pcm_runtime *runtime;
1973 runtime = substream->runtime;
1974 if (runtime->oss.subdivision || runtime->oss.fragshift)
1976 fragshift = val & 0xffff;
1977 if (fragshift >= 25) /* should be large enough */
1979 runtime->oss.fragshift = fragshift;
1980 runtime->oss.maxfrags = (val >> 16) & 0xffff;
1981 if (runtime->oss.fragshift < 4) /* < 16 */
1982 runtime->oss.fragshift = 4;
1983 if (runtime->oss.maxfrags < 2)
1984 runtime->oss.maxfrags = 2;
1985 runtime->oss.params = 1;
1989 static int snd_pcm_oss_set_fragment(struct snd_pcm_oss_file *pcm_oss_file, unsigned int val)
1991 int err = -EINVAL, idx;
1993 for (idx = 1; idx >= 0; --idx) {
1994 struct snd_pcm_substream *substream = pcm_oss_file->streams[idx];
1995 struct snd_pcm_runtime *runtime;
1997 if (substream == NULL)
1999 runtime = substream->runtime;
2000 err = lock_params(runtime);
2003 err = snd_pcm_oss_set_fragment1(substream, val);
2004 unlock_params(runtime);
2011 static int snd_pcm_oss_nonblock(struct file * file)
2013 spin_lock(&file->f_lock);
2014 file->f_flags |= O_NONBLOCK;
2015 spin_unlock(&file->f_lock);
2019 static int snd_pcm_oss_get_caps1(struct snd_pcm_substream *substream, int res)
2022 if (substream == NULL) {
2023 res &= ~DSP_CAP_DUPLEX;
2026 #ifdef DSP_CAP_MULTI
2027 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
2028 if (substream->pstr->substream_count > 1)
2029 res |= DSP_CAP_MULTI;
2031 /* DSP_CAP_REALTIME is set all times: */
2032 /* all ALSA drivers can return actual pointer in ring buffer */
2033 #if defined(DSP_CAP_REALTIME) && 0
2035 struct snd_pcm_runtime *runtime = substream->runtime;
2036 if (runtime->info & (SNDRV_PCM_INFO_BLOCK_TRANSFER|SNDRV_PCM_INFO_BATCH))
2037 res &= ~DSP_CAP_REALTIME;
2043 static int snd_pcm_oss_get_caps(struct snd_pcm_oss_file *pcm_oss_file)
2047 result = DSP_CAP_TRIGGER | DSP_CAP_MMAP | DSP_CAP_DUPLEX | DSP_CAP_REALTIME;
2048 for (idx = 0; idx < 2; idx++) {
2049 struct snd_pcm_substream *substream = pcm_oss_file->streams[idx];
2050 result = snd_pcm_oss_get_caps1(substream, result);
2052 result |= 0x0001; /* revision - same as SB AWE 64 */
2056 static void snd_pcm_oss_simulate_fill(struct snd_pcm_substream *substream,
2057 snd_pcm_uframes_t hw_ptr)
2059 struct snd_pcm_runtime *runtime = substream->runtime;
2060 snd_pcm_uframes_t appl_ptr;
2061 appl_ptr = hw_ptr + runtime->buffer_size;
2062 appl_ptr %= runtime->boundary;
2063 runtime->control->appl_ptr = appl_ptr;
2066 static int snd_pcm_oss_set_trigger(struct snd_pcm_oss_file *pcm_oss_file, int trigger)
2068 struct snd_pcm_runtime *runtime;
2069 struct snd_pcm_substream *psubstream = NULL, *csubstream = NULL;
2073 pr_debug("pcm_oss: trigger = 0x%x\n", trigger);
2076 psubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
2077 csubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
2080 if ((err = snd_pcm_oss_make_ready(psubstream)) < 0)
2084 if ((err = snd_pcm_oss_make_ready(csubstream)) < 0)
2088 runtime = psubstream->runtime;
2090 if (mutex_lock_interruptible(&runtime->oss.params_lock))
2091 return -ERESTARTSYS;
2092 if (trigger & PCM_ENABLE_OUTPUT) {
2093 if (runtime->oss.trigger)
2095 if (atomic_read(&psubstream->mmap_count))
2096 snd_pcm_oss_simulate_fill(psubstream,
2097 get_hw_ptr_period(runtime));
2098 runtime->oss.trigger = 1;
2099 runtime->start_threshold = 1;
2100 cmd = SNDRV_PCM_IOCTL_START;
2102 if (!runtime->oss.trigger)
2104 runtime->oss.trigger = 0;
2105 runtime->start_threshold = runtime->boundary;
2106 cmd = SNDRV_PCM_IOCTL_DROP;
2107 runtime->oss.prepare = 1;
2110 mutex_unlock(&runtime->oss.params_lock);
2112 err = snd_pcm_kernel_ioctl(psubstream, cmd, NULL);
2118 runtime = csubstream->runtime;
2120 if (mutex_lock_interruptible(&runtime->oss.params_lock))
2121 return -ERESTARTSYS;
2122 if (trigger & PCM_ENABLE_INPUT) {
2123 if (runtime->oss.trigger)
2125 runtime->oss.trigger = 1;
2126 runtime->start_threshold = 1;
2127 cmd = SNDRV_PCM_IOCTL_START;
2129 if (!runtime->oss.trigger)
2131 runtime->oss.trigger = 0;
2132 runtime->start_threshold = runtime->boundary;
2133 cmd = SNDRV_PCM_IOCTL_DROP;
2134 runtime->oss.prepare = 1;
2137 mutex_unlock(&runtime->oss.params_lock);
2139 err = snd_pcm_kernel_ioctl(csubstream, cmd, NULL);
2147 static int snd_pcm_oss_get_trigger(struct snd_pcm_oss_file *pcm_oss_file)
2149 struct snd_pcm_substream *psubstream = NULL, *csubstream = NULL;
2152 psubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
2153 csubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
2154 if (psubstream && psubstream->runtime && psubstream->runtime->oss.trigger)
2155 result |= PCM_ENABLE_OUTPUT;
2156 if (csubstream && csubstream->runtime && csubstream->runtime->oss.trigger)
2157 result |= PCM_ENABLE_INPUT;
2161 static int snd_pcm_oss_get_odelay(struct snd_pcm_oss_file *pcm_oss_file)
2163 struct snd_pcm_substream *substream;
2164 struct snd_pcm_runtime *runtime;
2165 snd_pcm_sframes_t delay;
2168 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
2169 if (substream == NULL)
2171 if ((err = snd_pcm_oss_make_ready(substream)) < 0)
2173 runtime = substream->runtime;
2174 if (runtime->oss.params || runtime->oss.prepare)
2176 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DELAY, &delay);
2178 delay = 0; /* hack for broken OSS applications */
2181 return snd_pcm_oss_bytes(substream, delay);
2184 static int snd_pcm_oss_get_ptr(struct snd_pcm_oss_file *pcm_oss_file, int stream, struct count_info __user * _info)
2186 struct snd_pcm_substream *substream;
2187 struct snd_pcm_runtime *runtime;
2188 snd_pcm_sframes_t delay;
2190 struct count_info info;
2195 substream = pcm_oss_file->streams[stream];
2196 if (substream == NULL)
2198 if ((err = snd_pcm_oss_make_ready(substream)) < 0)
2200 runtime = substream->runtime;
2201 if (runtime->oss.params || runtime->oss.prepare) {
2202 memset(&info, 0, sizeof(info));
2203 if (copy_to_user(_info, &info, sizeof(info)))
2207 if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
2208 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DELAY, &delay);
2209 if (err == -EPIPE || err == -ESTRPIPE || (! err && delay < 0)) {
2214 fixup = runtime->oss.buffer_used;
2217 err = snd_pcm_oss_capture_position_fixup(substream, &delay);
2218 fixup = -runtime->oss.buffer_used;
2222 info.ptr = snd_pcm_oss_bytes(substream, runtime->status->hw_ptr % runtime->buffer_size);
2223 if (atomic_read(&substream->mmap_count)) {
2224 snd_pcm_sframes_t n;
2225 delay = get_hw_ptr_period(runtime);
2226 n = delay - runtime->oss.prev_hw_ptr_period;
2228 n += runtime->boundary;
2229 info.blocks = n / runtime->period_size;
2230 runtime->oss.prev_hw_ptr_period = delay;
2231 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
2232 snd_pcm_oss_simulate_fill(substream, delay);
2233 info.bytes = snd_pcm_oss_bytes(substream, runtime->status->hw_ptr) & INT_MAX;
2235 delay = snd_pcm_oss_bytes(substream, delay);
2236 if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
2237 if (substream->oss.setup.buggyptr)
2238 info.blocks = (runtime->oss.buffer_bytes - delay - fixup) / runtime->oss.period_bytes;
2240 info.blocks = (delay + fixup) / runtime->oss.period_bytes;
2241 info.bytes = (runtime->oss.bytes - delay) & INT_MAX;
2244 info.blocks = delay / runtime->oss.period_bytes;
2245 info.bytes = (runtime->oss.bytes + delay) & INT_MAX;
2248 if (copy_to_user(_info, &info, sizeof(info)))
2253 static int snd_pcm_oss_get_space(struct snd_pcm_oss_file *pcm_oss_file, int stream, struct audio_buf_info __user *_info)
2255 struct snd_pcm_substream *substream;
2256 struct snd_pcm_runtime *runtime;
2257 snd_pcm_sframes_t avail;
2259 struct audio_buf_info info;
2264 substream = pcm_oss_file->streams[stream];
2265 if (substream == NULL)
2267 runtime = substream->runtime;
2269 if (runtime->oss.params &&
2270 (err = snd_pcm_oss_change_params(substream, false)) < 0)
2273 info.fragsize = runtime->oss.period_bytes;
2274 info.fragstotal = runtime->periods;
2275 if (runtime->oss.prepare) {
2276 if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
2277 info.bytes = runtime->oss.period_bytes * runtime->oss.periods;
2278 info.fragments = runtime->oss.periods;
2284 if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
2285 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DELAY, &avail);
2286 if (err == -EPIPE || err == -ESTRPIPE || (! err && avail < 0)) {
2287 avail = runtime->buffer_size;
2291 avail = runtime->buffer_size - avail;
2292 fixup = -runtime->oss.buffer_used;
2295 err = snd_pcm_oss_capture_position_fixup(substream, &avail);
2296 fixup = runtime->oss.buffer_used;
2300 info.bytes = snd_pcm_oss_bytes(substream, avail) + fixup;
2301 info.fragments = info.bytes / runtime->oss.period_bytes;
2305 pcm_dbg(substream->pcm,
2306 "pcm_oss: space: bytes = %i, fragments = %i, fragstotal = %i, fragsize = %i\n",
2307 info.bytes, info.fragments, info.fragstotal, info.fragsize);
2309 if (copy_to_user(_info, &info, sizeof(info)))
2314 static int snd_pcm_oss_get_mapbuf(struct snd_pcm_oss_file *pcm_oss_file, int stream, struct buffmem_desc __user * _info)
2316 // it won't be probably implemented
2317 // pr_debug("TODO: snd_pcm_oss_get_mapbuf\n");
2321 static const char *strip_task_path(const char *path)
2323 const char *ptr, *ptrl = NULL;
2324 for (ptr = path; *ptr; ptr++) {
2331 static void snd_pcm_oss_look_for_setup(struct snd_pcm *pcm, int stream,
2332 const char *task_name,
2333 struct snd_pcm_oss_setup *rsetup)
2335 struct snd_pcm_oss_setup *setup;
2337 mutex_lock(&pcm->streams[stream].oss.setup_mutex);
2339 for (setup = pcm->streams[stream].oss.setup_list; setup;
2340 setup = setup->next) {
2341 if (!strcmp(setup->task_name, task_name))
2344 } while ((task_name = strip_task_path(task_name)) != NULL);
2348 mutex_unlock(&pcm->streams[stream].oss.setup_mutex);
2351 static void snd_pcm_oss_release_substream(struct snd_pcm_substream *substream)
2353 struct snd_pcm_runtime *runtime;
2354 runtime = substream->runtime;
2355 kvfree(runtime->oss.buffer);
2356 runtime->oss.buffer = NULL;
2357 #ifdef CONFIG_SND_PCM_OSS_PLUGINS
2358 snd_pcm_oss_plugin_clear(substream);
2360 substream->oss.oss = 0;
2363 static void snd_pcm_oss_init_substream(struct snd_pcm_substream *substream,
2364 struct snd_pcm_oss_setup *setup,
2367 struct snd_pcm_runtime *runtime;
2369 substream->oss.oss = 1;
2370 substream->oss.setup = *setup;
2371 if (setup->nonblock)
2372 substream->f_flags |= O_NONBLOCK;
2373 else if (setup->block)
2374 substream->f_flags &= ~O_NONBLOCK;
2375 runtime = substream->runtime;
2376 runtime->oss.params = 1;
2377 runtime->oss.trigger = 1;
2378 runtime->oss.rate = 8000;
2379 mutex_init(&runtime->oss.params_lock);
2380 switch (SNDRV_MINOR_OSS_DEVICE(minor)) {
2381 case SNDRV_MINOR_OSS_PCM_8:
2382 runtime->oss.format = AFMT_U8;
2384 case SNDRV_MINOR_OSS_PCM_16:
2385 runtime->oss.format = AFMT_S16_LE;
2388 runtime->oss.format = AFMT_MU_LAW;
2390 runtime->oss.channels = 1;
2391 runtime->oss.fragshift = 0;
2392 runtime->oss.maxfrags = 0;
2393 runtime->oss.subdivision = 0;
2394 substream->pcm_release = snd_pcm_oss_release_substream;
2395 atomic_set(&runtime->oss.rw_ref, 0);
2398 static int snd_pcm_oss_release_file(struct snd_pcm_oss_file *pcm_oss_file)
2403 for (cidx = 0; cidx < 2; ++cidx) {
2404 struct snd_pcm_substream *substream = pcm_oss_file->streams[cidx];
2406 snd_pcm_release_substream(substream);
2408 kfree(pcm_oss_file);
2412 static int snd_pcm_oss_open_file(struct file *file,
2413 struct snd_pcm *pcm,
2414 struct snd_pcm_oss_file **rpcm_oss_file,
2416 struct snd_pcm_oss_setup *setup)
2419 struct snd_pcm_oss_file *pcm_oss_file;
2420 struct snd_pcm_substream *substream;
2421 fmode_t f_mode = file->f_mode;
2424 *rpcm_oss_file = NULL;
2426 pcm_oss_file = kzalloc(sizeof(*pcm_oss_file), GFP_KERNEL);
2427 if (pcm_oss_file == NULL)
2430 if ((f_mode & (FMODE_WRITE|FMODE_READ)) == (FMODE_WRITE|FMODE_READ) &&
2431 (pcm->info_flags & SNDRV_PCM_INFO_HALF_DUPLEX))
2432 f_mode = FMODE_WRITE;
2434 file->f_flags &= ~O_APPEND;
2435 for (idx = 0; idx < 2; idx++) {
2436 if (setup[idx].disable)
2438 if (! pcm->streams[idx].substream_count)
2439 continue; /* no matching substream */
2440 if (idx == SNDRV_PCM_STREAM_PLAYBACK) {
2441 if (! (f_mode & FMODE_WRITE))
2444 if (! (f_mode & FMODE_READ))
2447 err = snd_pcm_open_substream(pcm, idx, file, &substream);
2449 snd_pcm_oss_release_file(pcm_oss_file);
2453 pcm_oss_file->streams[idx] = substream;
2454 substream->file = pcm_oss_file;
2455 snd_pcm_oss_init_substream(substream, &setup[idx], minor);
2458 if (!pcm_oss_file->streams[0] && !pcm_oss_file->streams[1]) {
2459 snd_pcm_oss_release_file(pcm_oss_file);
2463 file->private_data = pcm_oss_file;
2465 *rpcm_oss_file = pcm_oss_file;
2470 static int snd_task_name(struct task_struct *task, char *name, size_t size)
2474 if (snd_BUG_ON(!task || !name || size < 2))
2476 for (idx = 0; idx < sizeof(task->comm) && idx + 1 < size; idx++)
2477 name[idx] = task->comm[idx];
2482 static int snd_pcm_oss_open(struct inode *inode, struct file *file)
2486 struct snd_pcm *pcm;
2487 struct snd_pcm_oss_file *pcm_oss_file;
2488 struct snd_pcm_oss_setup setup[2];
2490 wait_queue_entry_t wait;
2492 err = nonseekable_open(inode, file);
2496 pcm = snd_lookup_oss_minor_data(iminor(inode),
2497 SNDRV_OSS_DEVICE_TYPE_PCM);
2502 err = snd_card_file_add(pcm->card, file);
2505 if (!try_module_get(pcm->card->module)) {
2509 if (snd_task_name(current, task_name, sizeof(task_name)) < 0) {
2513 memset(setup, 0, sizeof(setup));
2514 if (file->f_mode & FMODE_WRITE)
2515 snd_pcm_oss_look_for_setup(pcm, SNDRV_PCM_STREAM_PLAYBACK,
2516 task_name, &setup[0]);
2517 if (file->f_mode & FMODE_READ)
2518 snd_pcm_oss_look_for_setup(pcm, SNDRV_PCM_STREAM_CAPTURE,
2519 task_name, &setup[1]);
2521 nonblock = !!(file->f_flags & O_NONBLOCK);
2523 nonblock = nonblock_open;
2525 init_waitqueue_entry(&wait, current);
2526 add_wait_queue(&pcm->open_wait, &wait);
2527 mutex_lock(&pcm->open_mutex);
2529 err = snd_pcm_oss_open_file(file, pcm, &pcm_oss_file,
2530 iminor(inode), setup);
2533 if (err == -EAGAIN) {
2540 set_current_state(TASK_INTERRUPTIBLE);
2541 mutex_unlock(&pcm->open_mutex);
2543 mutex_lock(&pcm->open_mutex);
2544 if (pcm->card->shutdown) {
2548 if (signal_pending(current)) {
2553 remove_wait_queue(&pcm->open_wait, &wait);
2554 mutex_unlock(&pcm->open_mutex);
2557 snd_card_unref(pcm->card);
2561 module_put(pcm->card->module);
2563 snd_card_file_remove(pcm->card, file);
2566 snd_card_unref(pcm->card);
2570 static int snd_pcm_oss_release(struct inode *inode, struct file *file)
2572 struct snd_pcm *pcm;
2573 struct snd_pcm_substream *substream;
2574 struct snd_pcm_oss_file *pcm_oss_file;
2576 pcm_oss_file = file->private_data;
2577 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
2578 if (substream == NULL)
2579 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
2580 if (snd_BUG_ON(!substream))
2582 pcm = substream->pcm;
2583 if (!pcm->card->shutdown)
2584 snd_pcm_oss_sync(pcm_oss_file);
2585 mutex_lock(&pcm->open_mutex);
2586 snd_pcm_oss_release_file(pcm_oss_file);
2587 mutex_unlock(&pcm->open_mutex);
2588 wake_up(&pcm->open_wait);
2589 module_put(pcm->card->module);
2590 snd_card_file_remove(pcm->card, file);
2594 static long snd_pcm_oss_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
2596 struct snd_pcm_oss_file *pcm_oss_file;
2597 int __user *p = (int __user *)arg;
2600 pcm_oss_file = file->private_data;
2601 if (cmd == OSS_GETVERSION)
2602 return put_user(SNDRV_OSS_VERSION, p);
2603 if (cmd == OSS_ALSAEMULVER)
2604 return put_user(1, p);
2605 #if IS_REACHABLE(CONFIG_SND_MIXER_OSS)
2606 if (((cmd >> 8) & 0xff) == 'M') { /* mixer ioctl - for OSS compatibility */
2607 struct snd_pcm_substream *substream;
2609 for (idx = 0; idx < 2; ++idx) {
2610 substream = pcm_oss_file->streams[idx];
2611 if (substream != NULL)
2614 if (snd_BUG_ON(idx >= 2))
2616 return snd_mixer_oss_ioctl_card(substream->pcm->card, cmd, arg);
2619 if (((cmd >> 8) & 0xff) != 'P')
2622 pr_debug("pcm_oss: ioctl = 0x%x\n", cmd);
2625 case SNDCTL_DSP_RESET:
2626 return snd_pcm_oss_reset(pcm_oss_file);
2627 case SNDCTL_DSP_SYNC:
2628 return snd_pcm_oss_sync(pcm_oss_file);
2629 case SNDCTL_DSP_SPEED:
2630 if (get_user(res, p))
2632 if ((res = snd_pcm_oss_set_rate(pcm_oss_file, res))<0)
2634 return put_user(res, p);
2635 case SOUND_PCM_READ_RATE:
2636 res = snd_pcm_oss_get_rate(pcm_oss_file);
2639 return put_user(res, p);
2640 case SNDCTL_DSP_STEREO:
2641 if (get_user(res, p))
2643 res = res > 0 ? 2 : 1;
2644 if ((res = snd_pcm_oss_set_channels(pcm_oss_file, res)) < 0)
2646 return put_user(--res, p);
2647 case SNDCTL_DSP_GETBLKSIZE:
2648 res = snd_pcm_oss_get_block_size(pcm_oss_file);
2651 return put_user(res, p);
2652 case SNDCTL_DSP_SETFMT:
2653 if (get_user(res, p))
2655 res = snd_pcm_oss_set_format(pcm_oss_file, res);
2658 return put_user(res, p);
2659 case SOUND_PCM_READ_BITS:
2660 res = snd_pcm_oss_get_format(pcm_oss_file);
2663 return put_user(res, p);
2664 case SNDCTL_DSP_CHANNELS:
2665 if (get_user(res, p))
2667 res = snd_pcm_oss_set_channels(pcm_oss_file, res);
2670 return put_user(res, p);
2671 case SOUND_PCM_READ_CHANNELS:
2672 res = snd_pcm_oss_get_channels(pcm_oss_file);
2675 return put_user(res, p);
2676 case SOUND_PCM_WRITE_FILTER:
2677 case SOUND_PCM_READ_FILTER:
2679 case SNDCTL_DSP_POST:
2680 return snd_pcm_oss_post(pcm_oss_file);
2681 case SNDCTL_DSP_SUBDIVIDE:
2682 if (get_user(res, p))
2684 res = snd_pcm_oss_set_subdivide(pcm_oss_file, res);
2687 return put_user(res, p);
2688 case SNDCTL_DSP_SETFRAGMENT:
2689 if (get_user(res, p))
2691 return snd_pcm_oss_set_fragment(pcm_oss_file, res);
2692 case SNDCTL_DSP_GETFMTS:
2693 res = snd_pcm_oss_get_formats(pcm_oss_file);
2696 return put_user(res, p);
2697 case SNDCTL_DSP_GETOSPACE:
2698 case SNDCTL_DSP_GETISPACE:
2699 return snd_pcm_oss_get_space(pcm_oss_file,
2700 cmd == SNDCTL_DSP_GETISPACE ?
2701 SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK,
2702 (struct audio_buf_info __user *) arg);
2703 case SNDCTL_DSP_NONBLOCK:
2704 return snd_pcm_oss_nonblock(file);
2705 case SNDCTL_DSP_GETCAPS:
2706 res = snd_pcm_oss_get_caps(pcm_oss_file);
2709 return put_user(res, p);
2710 case SNDCTL_DSP_GETTRIGGER:
2711 res = snd_pcm_oss_get_trigger(pcm_oss_file);
2714 return put_user(res, p);
2715 case SNDCTL_DSP_SETTRIGGER:
2716 if (get_user(res, p))
2718 return snd_pcm_oss_set_trigger(pcm_oss_file, res);
2719 case SNDCTL_DSP_GETIPTR:
2720 case SNDCTL_DSP_GETOPTR:
2721 return snd_pcm_oss_get_ptr(pcm_oss_file,
2722 cmd == SNDCTL_DSP_GETIPTR ?
2723 SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK,
2724 (struct count_info __user *) arg);
2725 case SNDCTL_DSP_MAPINBUF:
2726 case SNDCTL_DSP_MAPOUTBUF:
2727 return snd_pcm_oss_get_mapbuf(pcm_oss_file,
2728 cmd == SNDCTL_DSP_MAPINBUF ?
2729 SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK,
2730 (struct buffmem_desc __user *) arg);
2731 case SNDCTL_DSP_SETSYNCRO:
2732 /* stop DMA now.. */
2734 case SNDCTL_DSP_SETDUPLEX:
2735 if (snd_pcm_oss_get_caps(pcm_oss_file) & DSP_CAP_DUPLEX)
2738 case SNDCTL_DSP_GETODELAY:
2739 res = snd_pcm_oss_get_odelay(pcm_oss_file);
2741 /* it's for sure, some broken apps don't check for error codes */
2745 return put_user(res, p);
2746 case SNDCTL_DSP_PROFILE:
2747 return 0; /* silently ignore */
2749 pr_debug("pcm_oss: unknown command = 0x%x\n", cmd);
2754 #ifdef CONFIG_COMPAT
2755 /* all compatible */
2756 static long snd_pcm_oss_ioctl_compat(struct file *file, unsigned int cmd,
2759 return snd_pcm_oss_ioctl(file, cmd, (unsigned long)compat_ptr(arg));
2762 #define snd_pcm_oss_ioctl_compat NULL
2765 static ssize_t snd_pcm_oss_read(struct file *file, char __user *buf, size_t count, loff_t *offset)
2767 struct snd_pcm_oss_file *pcm_oss_file;
2768 struct snd_pcm_substream *substream;
2770 pcm_oss_file = file->private_data;
2771 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
2772 if (substream == NULL)
2774 substream->f_flags = file->f_flags & O_NONBLOCK;
2776 return snd_pcm_oss_read1(substream, buf, count);
2779 ssize_t res = snd_pcm_oss_read1(substream, buf, count);
2780 pcm_dbg(substream->pcm,
2781 "pcm_oss: read %li bytes (returned %li bytes)\n",
2782 (long)count, (long)res);
2788 static ssize_t snd_pcm_oss_write(struct file *file, const char __user *buf, size_t count, loff_t *offset)
2790 struct snd_pcm_oss_file *pcm_oss_file;
2791 struct snd_pcm_substream *substream;
2794 pcm_oss_file = file->private_data;
2795 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
2796 if (substream == NULL)
2798 substream->f_flags = file->f_flags & O_NONBLOCK;
2799 result = snd_pcm_oss_write1(substream, buf, count);
2801 pcm_dbg(substream->pcm, "pcm_oss: write %li bytes (wrote %li bytes)\n",
2802 (long)count, (long)result);
2807 static int snd_pcm_oss_playback_ready(struct snd_pcm_substream *substream)
2809 struct snd_pcm_runtime *runtime = substream->runtime;
2810 if (atomic_read(&substream->mmap_count))
2811 return runtime->oss.prev_hw_ptr_period !=
2812 get_hw_ptr_period(runtime);
2814 return snd_pcm_playback_avail(runtime) >=
2815 runtime->oss.period_frames;
2818 static int snd_pcm_oss_capture_ready(struct snd_pcm_substream *substream)
2820 struct snd_pcm_runtime *runtime = substream->runtime;
2821 if (atomic_read(&substream->mmap_count))
2822 return runtime->oss.prev_hw_ptr_period !=
2823 get_hw_ptr_period(runtime);
2825 return snd_pcm_capture_avail(runtime) >=
2826 runtime->oss.period_frames;
2829 static unsigned int snd_pcm_oss_poll(struct file *file, poll_table * wait)
2831 struct snd_pcm_oss_file *pcm_oss_file;
2833 struct snd_pcm_substream *psubstream = NULL, *csubstream = NULL;
2835 pcm_oss_file = file->private_data;
2837 psubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
2838 csubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
2841 if (psubstream != NULL) {
2842 struct snd_pcm_runtime *runtime = psubstream->runtime;
2843 poll_wait(file, &runtime->sleep, wait);
2844 snd_pcm_stream_lock_irq(psubstream);
2845 if (runtime->status->state != SNDRV_PCM_STATE_DRAINING &&
2846 (runtime->status->state != SNDRV_PCM_STATE_RUNNING ||
2847 snd_pcm_oss_playback_ready(psubstream)))
2848 mask |= POLLOUT | POLLWRNORM;
2849 snd_pcm_stream_unlock_irq(psubstream);
2851 if (csubstream != NULL) {
2852 struct snd_pcm_runtime *runtime = csubstream->runtime;
2853 snd_pcm_state_t ostate;
2854 poll_wait(file, &runtime->sleep, wait);
2855 snd_pcm_stream_lock_irq(csubstream);
2856 if ((ostate = runtime->status->state) != SNDRV_PCM_STATE_RUNNING ||
2857 snd_pcm_oss_capture_ready(csubstream))
2858 mask |= POLLIN | POLLRDNORM;
2859 snd_pcm_stream_unlock_irq(csubstream);
2860 if (ostate != SNDRV_PCM_STATE_RUNNING && runtime->oss.trigger) {
2861 struct snd_pcm_oss_file ofile;
2862 memset(&ofile, 0, sizeof(ofile));
2863 ofile.streams[SNDRV_PCM_STREAM_CAPTURE] = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
2864 runtime->oss.trigger = 0;
2865 snd_pcm_oss_set_trigger(&ofile, PCM_ENABLE_INPUT);
2872 static int snd_pcm_oss_mmap(struct file *file, struct vm_area_struct *area)
2874 struct snd_pcm_oss_file *pcm_oss_file;
2875 struct snd_pcm_substream *substream = NULL;
2876 struct snd_pcm_runtime *runtime;
2880 pr_debug("pcm_oss: mmap begin\n");
2882 pcm_oss_file = file->private_data;
2883 switch ((area->vm_flags & (VM_READ | VM_WRITE))) {
2884 case VM_READ | VM_WRITE:
2885 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
2890 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
2893 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
2898 /* set VM_READ access as well to fix memset() routines that do
2899 reads before writes (to improve performance) */
2900 area->vm_flags |= VM_READ;
2901 if (substream == NULL)
2903 runtime = substream->runtime;
2904 if (!(runtime->info & SNDRV_PCM_INFO_MMAP_VALID))
2906 if (runtime->info & SNDRV_PCM_INFO_INTERLEAVED)
2907 runtime->access = SNDRV_PCM_ACCESS_MMAP_INTERLEAVED;
2911 if (runtime->oss.params) {
2912 /* use mutex_trylock() for params_lock for avoiding a deadlock
2913 * between mmap_sem and params_lock taken by
2914 * copy_from/to_user() in snd_pcm_oss_write/read()
2916 err = snd_pcm_oss_change_params(substream, true);
2920 #ifdef CONFIG_SND_PCM_OSS_PLUGINS
2921 if (runtime->oss.plugin_first != NULL)
2925 if (area->vm_pgoff != 0)
2928 err = snd_pcm_mmap_data(substream, file, area);
2931 runtime->oss.mmap_bytes = area->vm_end - area->vm_start;
2932 runtime->silence_threshold = 0;
2933 runtime->silence_size = 0;
2935 pr_debug("pcm_oss: mmap ok, bytes = 0x%x\n",
2936 runtime->oss.mmap_bytes);
2938 /* In mmap mode we never stop */
2939 runtime->stop_threshold = runtime->boundary;
2944 #ifdef CONFIG_SND_VERBOSE_PROCFS
2949 static void snd_pcm_oss_proc_read(struct snd_info_entry *entry,
2950 struct snd_info_buffer *buffer)
2952 struct snd_pcm_str *pstr = entry->private_data;
2953 struct snd_pcm_oss_setup *setup = pstr->oss.setup_list;
2954 mutex_lock(&pstr->oss.setup_mutex);
2956 snd_iprintf(buffer, "%s %u %u%s%s%s%s%s%s\n",
2960 setup->disable ? " disable" : "",
2961 setup->direct ? " direct" : "",
2962 setup->block ? " block" : "",
2963 setup->nonblock ? " non-block" : "",
2964 setup->partialfrag ? " partial-frag" : "",
2965 setup->nosilence ? " no-silence" : "");
2966 setup = setup->next;
2968 mutex_unlock(&pstr->oss.setup_mutex);
2971 static void snd_pcm_oss_proc_free_setup_list(struct snd_pcm_str * pstr)
2973 struct snd_pcm_oss_setup *setup, *setupn;
2975 for (setup = pstr->oss.setup_list, pstr->oss.setup_list = NULL;
2976 setup; setup = setupn) {
2977 setupn = setup->next;
2978 kfree(setup->task_name);
2981 pstr->oss.setup_list = NULL;
2984 static void snd_pcm_oss_proc_write(struct snd_info_entry *entry,
2985 struct snd_info_buffer *buffer)
2987 struct snd_pcm_str *pstr = entry->private_data;
2988 char line[128], str[32], task_name[32];
2991 struct snd_pcm_oss_setup *setup, *setup1, template;
2993 while (!snd_info_get_line(buffer, line, sizeof(line))) {
2994 mutex_lock(&pstr->oss.setup_mutex);
2995 memset(&template, 0, sizeof(template));
2996 ptr = snd_info_get_str(task_name, line, sizeof(task_name));
2997 if (!strcmp(task_name, "clear") || !strcmp(task_name, "erase")) {
2998 snd_pcm_oss_proc_free_setup_list(pstr);
2999 mutex_unlock(&pstr->oss.setup_mutex);
3002 for (setup = pstr->oss.setup_list; setup; setup = setup->next) {
3003 if (!strcmp(setup->task_name, task_name)) {
3008 ptr = snd_info_get_str(str, ptr, sizeof(str));
3009 template.periods = simple_strtoul(str, NULL, 10);
3010 ptr = snd_info_get_str(str, ptr, sizeof(str));
3011 template.period_size = simple_strtoul(str, NULL, 10);
3012 for (idx1 = 31; idx1 >= 0; idx1--)
3013 if (template.period_size & (1 << idx1))
3015 for (idx1--; idx1 >= 0; idx1--)
3016 template.period_size &= ~(1 << idx1);
3018 ptr = snd_info_get_str(str, ptr, sizeof(str));
3019 if (!strcmp(str, "disable")) {
3020 template.disable = 1;
3021 } else if (!strcmp(str, "direct")) {
3022 template.direct = 1;
3023 } else if (!strcmp(str, "block")) {
3025 } else if (!strcmp(str, "non-block")) {
3026 template.nonblock = 1;
3027 } else if (!strcmp(str, "partial-frag")) {
3028 template.partialfrag = 1;
3029 } else if (!strcmp(str, "no-silence")) {
3030 template.nosilence = 1;
3031 } else if (!strcmp(str, "buggy-ptr")) {
3032 template.buggyptr = 1;
3035 if (setup == NULL) {
3036 setup = kmalloc(sizeof(*setup), GFP_KERNEL);
3038 buffer->error = -ENOMEM;
3039 mutex_unlock(&pstr->oss.setup_mutex);
3042 if (pstr->oss.setup_list == NULL)
3043 pstr->oss.setup_list = setup;
3045 for (setup1 = pstr->oss.setup_list;
3046 setup1->next; setup1 = setup1->next);
3047 setup1->next = setup;
3049 template.task_name = kstrdup(task_name, GFP_KERNEL);
3050 if (! template.task_name) {
3052 buffer->error = -ENOMEM;
3053 mutex_unlock(&pstr->oss.setup_mutex);
3058 mutex_unlock(&pstr->oss.setup_mutex);
3062 static void snd_pcm_oss_proc_init(struct snd_pcm *pcm)
3065 for (stream = 0; stream < 2; ++stream) {
3066 struct snd_info_entry *entry;
3067 struct snd_pcm_str *pstr = &pcm->streams[stream];
3068 if (pstr->substream_count == 0)
3070 if ((entry = snd_info_create_card_entry(pcm->card, "oss", pstr->proc_root)) != NULL) {
3071 entry->content = SNDRV_INFO_CONTENT_TEXT;
3072 entry->mode = S_IFREG | S_IRUGO | S_IWUSR;
3073 entry->c.text.read = snd_pcm_oss_proc_read;
3074 entry->c.text.write = snd_pcm_oss_proc_write;
3075 entry->private_data = pstr;
3076 if (snd_info_register(entry) < 0) {
3077 snd_info_free_entry(entry);
3081 pstr->oss.proc_entry = entry;
3085 static void snd_pcm_oss_proc_done(struct snd_pcm *pcm)
3088 for (stream = 0; stream < 2; ++stream) {
3089 struct snd_pcm_str *pstr = &pcm->streams[stream];
3090 snd_info_free_entry(pstr->oss.proc_entry);
3091 pstr->oss.proc_entry = NULL;
3092 snd_pcm_oss_proc_free_setup_list(pstr);
3095 #else /* !CONFIG_SND_VERBOSE_PROCFS */
3096 #define snd_pcm_oss_proc_init(pcm)
3097 #define snd_pcm_oss_proc_done(pcm)
3098 #endif /* CONFIG_SND_VERBOSE_PROCFS */
3104 static const struct file_operations snd_pcm_oss_f_reg =
3106 .owner = THIS_MODULE,
3107 .read = snd_pcm_oss_read,
3108 .write = snd_pcm_oss_write,
3109 .open = snd_pcm_oss_open,
3110 .release = snd_pcm_oss_release,
3111 .llseek = no_llseek,
3112 .poll = snd_pcm_oss_poll,
3113 .unlocked_ioctl = snd_pcm_oss_ioctl,
3114 .compat_ioctl = snd_pcm_oss_ioctl_compat,
3115 .mmap = snd_pcm_oss_mmap,
3118 static void register_oss_dsp(struct snd_pcm *pcm, int index)
3120 if (snd_register_oss_device(SNDRV_OSS_DEVICE_TYPE_PCM,
3121 pcm->card, index, &snd_pcm_oss_f_reg,
3123 pcm_err(pcm, "unable to register OSS PCM device %i:%i\n",
3124 pcm->card->number, pcm->device);
3128 static int snd_pcm_oss_register_minor(struct snd_pcm *pcm)
3131 if (dsp_map[pcm->card->number] == (int)pcm->device) {
3134 register_oss_dsp(pcm, 0);
3135 duplex = (pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream_count > 0 &&
3136 pcm->streams[SNDRV_PCM_STREAM_CAPTURE].substream_count &&
3137 !(pcm->info_flags & SNDRV_PCM_INFO_HALF_DUPLEX));
3138 sprintf(name, "%s%s", pcm->name, duplex ? " (DUPLEX)" : "");
3139 #ifdef SNDRV_OSS_INFO_DEV_AUDIO
3140 snd_oss_info_register(SNDRV_OSS_INFO_DEV_AUDIO,
3145 pcm->oss.reg_mask |= 1;
3147 if (adsp_map[pcm->card->number] == (int)pcm->device) {
3148 register_oss_dsp(pcm, 1);
3150 pcm->oss.reg_mask |= 2;
3154 snd_pcm_oss_proc_init(pcm);
3159 static int snd_pcm_oss_disconnect_minor(struct snd_pcm *pcm)
3162 if (pcm->oss.reg_mask & 1) {
3163 pcm->oss.reg_mask &= ~1;
3164 snd_unregister_oss_device(SNDRV_OSS_DEVICE_TYPE_PCM,
3167 if (pcm->oss.reg_mask & 2) {
3168 pcm->oss.reg_mask &= ~2;
3169 snd_unregister_oss_device(SNDRV_OSS_DEVICE_TYPE_PCM,
3172 if (dsp_map[pcm->card->number] == (int)pcm->device) {
3173 #ifdef SNDRV_OSS_INFO_DEV_AUDIO
3174 snd_oss_info_unregister(SNDRV_OSS_INFO_DEV_AUDIO, pcm->card->number);
3182 static int snd_pcm_oss_unregister_minor(struct snd_pcm *pcm)
3184 snd_pcm_oss_disconnect_minor(pcm);
3185 snd_pcm_oss_proc_done(pcm);
3189 static struct snd_pcm_notify snd_pcm_oss_notify =
3191 .n_register = snd_pcm_oss_register_minor,
3192 .n_disconnect = snd_pcm_oss_disconnect_minor,
3193 .n_unregister = snd_pcm_oss_unregister_minor,
3196 static int __init alsa_pcm_oss_init(void)
3201 /* check device map table */
3202 for (i = 0; i < SNDRV_CARDS; i++) {
3203 if (dsp_map[i] < 0 || dsp_map[i] >= SNDRV_PCM_DEVICES) {
3204 pr_err("ALSA: pcm_oss: invalid dsp_map[%d] = %d\n",
3208 if (adsp_map[i] < 0 || adsp_map[i] >= SNDRV_PCM_DEVICES) {
3209 pr_err("ALSA: pcm_oss: invalid adsp_map[%d] = %d\n",
3214 if ((err = snd_pcm_notify(&snd_pcm_oss_notify, 0)) < 0)
3219 static void __exit alsa_pcm_oss_exit(void)
3221 snd_pcm_notify(&snd_pcm_oss_notify, 1);
3224 module_init(alsa_pcm_oss_init)
3225 module_exit(alsa_pcm_oss_exit)