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 static int snd_pcm_oss_change_params(struct snd_pcm_substream *substream,
829 struct snd_pcm_runtime *runtime = substream->runtime;
830 struct snd_pcm_hw_params *params, *sparams;
831 struct snd_pcm_sw_params *sw_params;
832 ssize_t oss_buffer_size, oss_period_size;
833 size_t oss_frame_size;
836 snd_pcm_format_t format, sformat;
838 const struct snd_mask *sformat_mask;
839 struct snd_mask mask;
842 if (!(mutex_trylock(&runtime->oss.params_lock)))
844 } else if (mutex_lock_interruptible(&runtime->oss.params_lock))
846 sw_params = kzalloc(sizeof(*sw_params), GFP_KERNEL);
847 params = kmalloc(sizeof(*params), GFP_KERNEL);
848 sparams = kmalloc(sizeof(*sparams), GFP_KERNEL);
849 if (!sw_params || !params || !sparams) {
854 if (atomic_read(&substream->mmap_count))
857 direct = substream->oss.setup.direct;
859 _snd_pcm_hw_params_any(sparams);
860 _snd_pcm_hw_param_setinteger(sparams, SNDRV_PCM_HW_PARAM_PERIODS);
861 _snd_pcm_hw_param_min(sparams, SNDRV_PCM_HW_PARAM_PERIODS, 2, 0);
862 snd_mask_none(&mask);
863 if (atomic_read(&substream->mmap_count))
864 snd_mask_set(&mask, (__force int)SNDRV_PCM_ACCESS_MMAP_INTERLEAVED);
866 snd_mask_set(&mask, (__force int)SNDRV_PCM_ACCESS_RW_INTERLEAVED);
868 snd_mask_set(&mask, (__force int)SNDRV_PCM_ACCESS_RW_NONINTERLEAVED);
870 err = snd_pcm_hw_param_mask(substream, sparams, SNDRV_PCM_HW_PARAM_ACCESS, &mask);
872 pcm_dbg(substream->pcm, "No usable accesses\n");
876 choose_rate(substream, sparams, runtime->oss.rate);
877 snd_pcm_hw_param_near(substream, sparams, SNDRV_PCM_HW_PARAM_CHANNELS, runtime->oss.channels, NULL);
879 format = snd_pcm_oss_format_from(runtime->oss.format);
881 sformat_mask = hw_param_mask_c(sparams, SNDRV_PCM_HW_PARAM_FORMAT);
885 sformat = snd_pcm_plug_slave_format(format, sformat_mask);
887 if ((__force int)sformat < 0 ||
888 !snd_mask_test(sformat_mask, (__force int)sformat)) {
889 for (sformat = (__force snd_pcm_format_t)0;
890 (__force int)sformat <= (__force int)SNDRV_PCM_FORMAT_LAST;
891 sformat = (__force snd_pcm_format_t)((__force int)sformat + 1)) {
892 if (snd_mask_test(sformat_mask, (__force int)sformat) &&
893 snd_pcm_oss_format_to(sformat) >= 0)
896 if ((__force int)sformat > (__force int)SNDRV_PCM_FORMAT_LAST) {
897 pcm_dbg(substream->pcm, "Cannot find a format!!!\n");
902 err = _snd_pcm_hw_param_set(sparams, SNDRV_PCM_HW_PARAM_FORMAT, (__force int)sformat, 0);
907 memcpy(params, sparams, sizeof(*params));
909 _snd_pcm_hw_params_any(params);
910 _snd_pcm_hw_param_set(params, SNDRV_PCM_HW_PARAM_ACCESS,
911 (__force int)SNDRV_PCM_ACCESS_RW_INTERLEAVED, 0);
912 _snd_pcm_hw_param_set(params, SNDRV_PCM_HW_PARAM_FORMAT,
913 (__force int)snd_pcm_oss_format_from(runtime->oss.format), 0);
914 _snd_pcm_hw_param_set(params, SNDRV_PCM_HW_PARAM_CHANNELS,
915 runtime->oss.channels, 0);
916 _snd_pcm_hw_param_set(params, SNDRV_PCM_HW_PARAM_RATE,
917 runtime->oss.rate, 0);
918 pdprintf("client: access = %i, format = %i, channels = %i, rate = %i\n",
919 params_access(params), params_format(params),
920 params_channels(params), params_rate(params));
922 pdprintf("slave: access = %i, format = %i, channels = %i, rate = %i\n",
923 params_access(sparams), params_format(sparams),
924 params_channels(sparams), params_rate(sparams));
926 oss_frame_size = snd_pcm_format_physical_width(params_format(params)) *
927 params_channels(params) / 8;
929 #ifdef CONFIG_SND_PCM_OSS_PLUGINS
930 snd_pcm_oss_plugin_clear(substream);
932 /* add necessary plugins */
933 snd_pcm_oss_plugin_clear(substream);
934 if ((err = snd_pcm_plug_format_plugins(substream,
937 pcm_dbg(substream->pcm,
938 "snd_pcm_plug_format_plugins failed: %i\n", err);
939 snd_pcm_oss_plugin_clear(substream);
942 if (runtime->oss.plugin_first) {
943 struct snd_pcm_plugin *plugin;
944 if ((err = snd_pcm_plugin_build_io(substream, sparams, &plugin)) < 0) {
945 pcm_dbg(substream->pcm,
946 "snd_pcm_plugin_build_io failed: %i\n", err);
947 snd_pcm_oss_plugin_clear(substream);
950 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
951 err = snd_pcm_plugin_append(plugin);
953 err = snd_pcm_plugin_insert(plugin);
956 snd_pcm_oss_plugin_clear(substream);
963 err = snd_pcm_oss_period_size(substream, params, sparams);
967 n = snd_pcm_plug_slave_size(substream, runtime->oss.period_bytes / oss_frame_size);
968 err = snd_pcm_hw_param_near(substream, sparams, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, n, NULL);
972 err = snd_pcm_hw_param_near(substream, sparams, SNDRV_PCM_HW_PARAM_PERIODS,
973 runtime->oss.periods, NULL);
977 snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DROP, NULL);
979 if ((err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_HW_PARAMS, sparams)) < 0) {
980 pcm_dbg(substream->pcm, "HW_PARAMS failed: %i\n", err);
984 if (runtime->oss.trigger) {
985 sw_params->start_threshold = 1;
987 sw_params->start_threshold = runtime->boundary;
989 if (atomic_read(&substream->mmap_count) ||
990 substream->stream == SNDRV_PCM_STREAM_CAPTURE)
991 sw_params->stop_threshold = runtime->boundary;
993 sw_params->stop_threshold = runtime->buffer_size;
994 sw_params->tstamp_mode = SNDRV_PCM_TSTAMP_NONE;
995 sw_params->period_step = 1;
996 sw_params->avail_min = substream->stream == SNDRV_PCM_STREAM_PLAYBACK ?
997 1 : runtime->period_size;
998 if (atomic_read(&substream->mmap_count) ||
999 substream->oss.setup.nosilence) {
1000 sw_params->silence_threshold = 0;
1001 sw_params->silence_size = 0;
1003 snd_pcm_uframes_t frames;
1004 frames = runtime->period_size + 16;
1005 if (frames > runtime->buffer_size)
1006 frames = runtime->buffer_size;
1007 sw_params->silence_threshold = frames;
1008 sw_params->silence_size = frames;
1011 if ((err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_SW_PARAMS, sw_params)) < 0) {
1012 pcm_dbg(substream->pcm, "SW_PARAMS failed: %i\n", err);
1016 runtime->oss.periods = params_periods(sparams);
1017 oss_period_size = snd_pcm_plug_client_size(substream, params_period_size(sparams));
1018 if (oss_period_size < 0) {
1022 #ifdef CONFIG_SND_PCM_OSS_PLUGINS
1023 if (runtime->oss.plugin_first) {
1024 err = snd_pcm_plug_alloc(substream, oss_period_size);
1029 oss_period_size *= oss_frame_size;
1031 oss_buffer_size = oss_period_size * runtime->oss.periods;
1032 if (oss_buffer_size < 0) {
1037 runtime->oss.period_bytes = oss_period_size;
1038 runtime->oss.buffer_bytes = oss_buffer_size;
1040 pdprintf("oss: period bytes = %i, buffer bytes = %i\n",
1041 runtime->oss.period_bytes,
1042 runtime->oss.buffer_bytes);
1043 pdprintf("slave: period_size = %i, buffer_size = %i\n",
1044 params_period_size(sparams),
1045 params_buffer_size(sparams));
1047 runtime->oss.format = snd_pcm_oss_format_to(params_format(params));
1048 runtime->oss.channels = params_channels(params);
1049 runtime->oss.rate = params_rate(params);
1051 vfree(runtime->oss.buffer);
1052 runtime->oss.buffer = vmalloc(runtime->oss.period_bytes);
1053 if (!runtime->oss.buffer) {
1058 runtime->oss.params = 0;
1059 runtime->oss.prepare = 1;
1060 runtime->oss.buffer_used = 0;
1061 if (runtime->dma_area)
1062 snd_pcm_format_set_silence(runtime->format, runtime->dma_area, bytes_to_samples(runtime, runtime->dma_bytes));
1064 runtime->oss.period_frames = snd_pcm_alsa_frames(substream, oss_period_size);
1071 mutex_unlock(&runtime->oss.params_lock);
1075 static int snd_pcm_oss_get_active_substream(struct snd_pcm_oss_file *pcm_oss_file, struct snd_pcm_substream **r_substream)
1078 struct snd_pcm_substream *asubstream = NULL, *substream;
1080 for (idx = 0; idx < 2; idx++) {
1081 substream = pcm_oss_file->streams[idx];
1082 if (substream == NULL)
1084 if (asubstream == NULL)
1085 asubstream = substream;
1086 if (substream->runtime->oss.params) {
1087 err = snd_pcm_oss_change_params(substream, false);
1095 *r_substream = asubstream;
1099 static int snd_pcm_oss_prepare(struct snd_pcm_substream *substream)
1102 struct snd_pcm_runtime *runtime = substream->runtime;
1104 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_PREPARE, NULL);
1106 pcm_dbg(substream->pcm,
1107 "snd_pcm_oss_prepare: SNDRV_PCM_IOCTL_PREPARE failed\n");
1110 runtime->oss.prepare = 0;
1111 runtime->oss.prev_hw_ptr_period = 0;
1112 runtime->oss.period_ptr = 0;
1113 runtime->oss.buffer_used = 0;
1118 static int snd_pcm_oss_make_ready(struct snd_pcm_substream *substream)
1120 struct snd_pcm_runtime *runtime;
1123 if (substream == NULL)
1125 runtime = substream->runtime;
1126 if (runtime->oss.params) {
1127 err = snd_pcm_oss_change_params(substream, false);
1131 if (runtime->oss.prepare) {
1132 err = snd_pcm_oss_prepare(substream);
1139 static int snd_pcm_oss_capture_position_fixup(struct snd_pcm_substream *substream, snd_pcm_sframes_t *delay)
1141 struct snd_pcm_runtime *runtime;
1142 snd_pcm_uframes_t frames;
1146 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DELAY, delay);
1149 runtime = substream->runtime;
1150 if (*delay <= (snd_pcm_sframes_t)runtime->buffer_size)
1152 /* in case of overrun, skip whole periods like OSS/Linux driver does */
1153 /* until avail(delay) <= buffer_size */
1154 frames = (*delay - runtime->buffer_size) + runtime->period_size - 1;
1155 frames /= runtime->period_size;
1156 frames *= runtime->period_size;
1157 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_FORWARD, &frames);
1164 snd_pcm_sframes_t snd_pcm_oss_write3(struct snd_pcm_substream *substream, const char *ptr, snd_pcm_uframes_t frames, int in_kernel)
1166 struct snd_pcm_runtime *runtime = substream->runtime;
1169 if (runtime->status->state == SNDRV_PCM_STATE_XRUN ||
1170 runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) {
1172 pcm_dbg(substream->pcm,
1173 "pcm_oss: write: recovering from %s\n",
1174 runtime->status->state == SNDRV_PCM_STATE_XRUN ?
1175 "XRUN" : "SUSPEND");
1177 ret = snd_pcm_oss_prepare(substream);
1181 ret = __snd_pcm_lib_xfer(substream, (void *)ptr, true,
1183 if (ret != -EPIPE && ret != -ESTRPIPE)
1185 /* test, if we can't store new data, because the stream */
1186 /* has not been started */
1187 if (runtime->status->state == SNDRV_PCM_STATE_PREPARED)
1193 snd_pcm_sframes_t snd_pcm_oss_read3(struct snd_pcm_substream *substream, char *ptr, snd_pcm_uframes_t frames, int in_kernel)
1195 struct snd_pcm_runtime *runtime = substream->runtime;
1196 snd_pcm_sframes_t delay;
1199 if (runtime->status->state == SNDRV_PCM_STATE_XRUN ||
1200 runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) {
1202 pcm_dbg(substream->pcm,
1203 "pcm_oss: read: recovering from %s\n",
1204 runtime->status->state == SNDRV_PCM_STATE_XRUN ?
1205 "XRUN" : "SUSPEND");
1207 ret = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DRAIN, NULL);
1210 } else if (runtime->status->state == SNDRV_PCM_STATE_SETUP) {
1211 ret = snd_pcm_oss_prepare(substream);
1215 ret = snd_pcm_oss_capture_position_fixup(substream, &delay);
1218 ret = __snd_pcm_lib_xfer(substream, (void *)ptr, true,
1220 if (ret == -EPIPE) {
1221 if (runtime->status->state == SNDRV_PCM_STATE_DRAINING) {
1222 ret = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DROP, NULL);
1228 if (ret != -ESTRPIPE)
1234 #ifdef CONFIG_SND_PCM_OSS_PLUGINS
1235 snd_pcm_sframes_t snd_pcm_oss_writev3(struct snd_pcm_substream *substream, void **bufs, snd_pcm_uframes_t frames)
1237 struct snd_pcm_runtime *runtime = substream->runtime;
1240 if (runtime->status->state == SNDRV_PCM_STATE_XRUN ||
1241 runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) {
1243 pcm_dbg(substream->pcm,
1244 "pcm_oss: writev: recovering from %s\n",
1245 runtime->status->state == SNDRV_PCM_STATE_XRUN ?
1246 "XRUN" : "SUSPEND");
1248 ret = snd_pcm_oss_prepare(substream);
1252 ret = snd_pcm_kernel_writev(substream, bufs, frames);
1253 if (ret != -EPIPE && ret != -ESTRPIPE)
1256 /* test, if we can't store new data, because the stream */
1257 /* has not been started */
1258 if (runtime->status->state == SNDRV_PCM_STATE_PREPARED)
1264 snd_pcm_sframes_t snd_pcm_oss_readv3(struct snd_pcm_substream *substream, void **bufs, snd_pcm_uframes_t frames)
1266 struct snd_pcm_runtime *runtime = substream->runtime;
1269 if (runtime->status->state == SNDRV_PCM_STATE_XRUN ||
1270 runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) {
1272 pcm_dbg(substream->pcm,
1273 "pcm_oss: readv: recovering from %s\n",
1274 runtime->status->state == SNDRV_PCM_STATE_XRUN ?
1275 "XRUN" : "SUSPEND");
1277 ret = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DRAIN, NULL);
1280 } else if (runtime->status->state == SNDRV_PCM_STATE_SETUP) {
1281 ret = snd_pcm_oss_prepare(substream);
1285 ret = snd_pcm_kernel_readv(substream, bufs, frames);
1286 if (ret != -EPIPE && ret != -ESTRPIPE)
1291 #endif /* CONFIG_SND_PCM_OSS_PLUGINS */
1293 static ssize_t snd_pcm_oss_write2(struct snd_pcm_substream *substream, const char *buf, size_t bytes, int in_kernel)
1295 struct snd_pcm_runtime *runtime = substream->runtime;
1296 snd_pcm_sframes_t frames, frames1;
1297 #ifdef CONFIG_SND_PCM_OSS_PLUGINS
1298 if (runtime->oss.plugin_first) {
1299 struct snd_pcm_plugin_channel *channels;
1300 size_t oss_frame_bytes = (runtime->oss.plugin_first->src_width * runtime->oss.plugin_first->src_format.channels) / 8;
1302 if (copy_from_user(runtime->oss.buffer, (const char __force __user *)buf, bytes))
1304 buf = runtime->oss.buffer;
1306 frames = bytes / oss_frame_bytes;
1307 frames1 = snd_pcm_plug_client_channels_buf(substream, (char *)buf, frames, &channels);
1310 frames1 = snd_pcm_plug_write_transfer(substream, channels, frames1);
1313 bytes = frames1 * oss_frame_bytes;
1317 frames = bytes_to_frames(runtime, bytes);
1318 frames1 = snd_pcm_oss_write3(substream, buf, frames, in_kernel);
1321 bytes = frames_to_bytes(runtime, frames1);
1326 static ssize_t snd_pcm_oss_write1(struct snd_pcm_substream *substream, const char __user *buf, size_t bytes)
1330 struct snd_pcm_runtime *runtime = substream->runtime;
1332 if (atomic_read(&substream->mmap_count))
1335 if ((tmp = snd_pcm_oss_make_ready(substream)) < 0)
1338 if (mutex_lock_interruptible(&runtime->oss.params_lock)) {
1342 if (bytes < runtime->oss.period_bytes || runtime->oss.buffer_used > 0) {
1344 if (tmp + runtime->oss.buffer_used > runtime->oss.period_bytes)
1345 tmp = runtime->oss.period_bytes - runtime->oss.buffer_used;
1347 if (copy_from_user(runtime->oss.buffer + runtime->oss.buffer_used, buf, tmp)) {
1352 runtime->oss.buffer_used += tmp;
1356 if (substream->oss.setup.partialfrag ||
1357 runtime->oss.buffer_used == runtime->oss.period_bytes) {
1358 tmp = snd_pcm_oss_write2(substream, runtime->oss.buffer + runtime->oss.period_ptr,
1359 runtime->oss.buffer_used - runtime->oss.period_ptr, 1);
1362 runtime->oss.bytes += tmp;
1363 runtime->oss.period_ptr += tmp;
1364 runtime->oss.period_ptr %= runtime->oss.period_bytes;
1365 if (runtime->oss.period_ptr == 0 ||
1366 runtime->oss.period_ptr == runtime->oss.buffer_used)
1367 runtime->oss.buffer_used = 0;
1368 else if ((substream->f_flags & O_NONBLOCK) != 0) {
1374 tmp = snd_pcm_oss_write2(substream,
1375 (const char __force *)buf,
1376 runtime->oss.period_bytes, 0);
1379 runtime->oss.bytes += tmp;
1383 if ((substream->f_flags & O_NONBLOCK) != 0 &&
1384 tmp != runtime->oss.period_bytes)
1388 mutex_unlock(&runtime->oss.params_lock);
1391 if (signal_pending(current)) {
1397 return xfer > 0 ? (snd_pcm_sframes_t)xfer : tmp;
1400 static ssize_t snd_pcm_oss_read2(struct snd_pcm_substream *substream, char *buf, size_t bytes, int in_kernel)
1402 struct snd_pcm_runtime *runtime = substream->runtime;
1403 snd_pcm_sframes_t frames, frames1;
1404 #ifdef CONFIG_SND_PCM_OSS_PLUGINS
1405 char __user *final_dst = (char __force __user *)buf;
1406 if (runtime->oss.plugin_first) {
1407 struct snd_pcm_plugin_channel *channels;
1408 size_t oss_frame_bytes = (runtime->oss.plugin_last->dst_width * runtime->oss.plugin_last->dst_format.channels) / 8;
1410 buf = runtime->oss.buffer;
1411 frames = bytes / oss_frame_bytes;
1412 frames1 = snd_pcm_plug_client_channels_buf(substream, buf, frames, &channels);
1415 frames1 = snd_pcm_plug_read_transfer(substream, channels, frames1);
1418 bytes = frames1 * oss_frame_bytes;
1419 if (!in_kernel && copy_to_user(final_dst, buf, bytes))
1424 frames = bytes_to_frames(runtime, bytes);
1425 frames1 = snd_pcm_oss_read3(substream, buf, frames, in_kernel);
1428 bytes = frames_to_bytes(runtime, frames1);
1433 static ssize_t snd_pcm_oss_read1(struct snd_pcm_substream *substream, char __user *buf, size_t bytes)
1437 struct snd_pcm_runtime *runtime = substream->runtime;
1439 if (atomic_read(&substream->mmap_count))
1442 if ((tmp = snd_pcm_oss_make_ready(substream)) < 0)
1445 if (mutex_lock_interruptible(&runtime->oss.params_lock)) {
1449 if (bytes < runtime->oss.period_bytes || runtime->oss.buffer_used > 0) {
1450 if (runtime->oss.buffer_used == 0) {
1451 tmp = snd_pcm_oss_read2(substream, runtime->oss.buffer, runtime->oss.period_bytes, 1);
1454 runtime->oss.bytes += tmp;
1455 runtime->oss.period_ptr = tmp;
1456 runtime->oss.buffer_used = tmp;
1459 if ((size_t) tmp > runtime->oss.buffer_used)
1460 tmp = runtime->oss.buffer_used;
1461 if (copy_to_user(buf, runtime->oss.buffer + (runtime->oss.period_ptr - runtime->oss.buffer_used), tmp)) {
1468 runtime->oss.buffer_used -= tmp;
1470 tmp = snd_pcm_oss_read2(substream, (char __force *)buf,
1471 runtime->oss.period_bytes, 0);
1474 runtime->oss.bytes += tmp;
1480 mutex_unlock(&runtime->oss.params_lock);
1483 if (signal_pending(current)) {
1489 return xfer > 0 ? (snd_pcm_sframes_t)xfer : tmp;
1492 static int snd_pcm_oss_reset(struct snd_pcm_oss_file *pcm_oss_file)
1494 struct snd_pcm_substream *substream;
1495 struct snd_pcm_runtime *runtime;
1498 for (i = 0; i < 2; i++) {
1499 substream = pcm_oss_file->streams[i];
1502 runtime = substream->runtime;
1503 snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DROP, NULL);
1504 runtime->oss.prepare = 1;
1505 runtime->oss.buffer_used = 0;
1506 runtime->oss.prev_hw_ptr_period = 0;
1507 runtime->oss.period_ptr = 0;
1512 static int snd_pcm_oss_post(struct snd_pcm_oss_file *pcm_oss_file)
1514 struct snd_pcm_substream *substream;
1517 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
1518 if (substream != NULL) {
1519 if ((err = snd_pcm_oss_make_ready(substream)) < 0)
1521 snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_START, NULL);
1523 /* note: all errors from the start action are ignored */
1524 /* OSS apps do not know, how to handle them */
1528 static int snd_pcm_oss_sync1(struct snd_pcm_substream *substream, size_t size)
1530 struct snd_pcm_runtime *runtime;
1532 snd_pcm_state_t state;
1534 wait_queue_entry_t wait;
1536 runtime = substream->runtime;
1537 init_waitqueue_entry(&wait, current);
1538 add_wait_queue(&runtime->sleep, &wait);
1540 pcm_dbg(substream->pcm, "sync1: size = %li\n", size);
1543 result = snd_pcm_oss_write2(substream, runtime->oss.buffer, size, 1);
1545 runtime->oss.buffer_used = 0;
1549 if (result != 0 && result != -EAGAIN)
1552 set_current_state(TASK_INTERRUPTIBLE);
1553 snd_pcm_stream_lock_irq(substream);
1554 state = runtime->status->state;
1555 snd_pcm_stream_unlock_irq(substream);
1556 if (state != SNDRV_PCM_STATE_RUNNING) {
1557 set_current_state(TASK_RUNNING);
1560 res = schedule_timeout(10 * HZ);
1561 if (signal_pending(current)) {
1562 result = -ERESTARTSYS;
1566 pcm_err(substream->pcm,
1567 "OSS sync error - DMA timeout\n");
1572 remove_wait_queue(&runtime->sleep, &wait);
1576 static int snd_pcm_oss_sync(struct snd_pcm_oss_file *pcm_oss_file)
1579 unsigned int saved_f_flags;
1580 struct snd_pcm_substream *substream;
1581 struct snd_pcm_runtime *runtime;
1582 snd_pcm_format_t format;
1583 unsigned long width;
1586 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
1587 if (substream != NULL) {
1588 runtime = substream->runtime;
1589 if (atomic_read(&substream->mmap_count))
1591 if ((err = snd_pcm_oss_make_ready(substream)) < 0)
1593 format = snd_pcm_oss_format_from(runtime->oss.format);
1594 width = snd_pcm_format_physical_width(format);
1595 mutex_lock(&runtime->oss.params_lock);
1596 if (runtime->oss.buffer_used > 0) {
1598 pcm_dbg(substream->pcm, "sync: buffer_used\n");
1600 size = (8 * (runtime->oss.period_bytes - runtime->oss.buffer_used) + 7) / width;
1601 snd_pcm_format_set_silence(format,
1602 runtime->oss.buffer + runtime->oss.buffer_used,
1604 err = snd_pcm_oss_sync1(substream, runtime->oss.period_bytes);
1606 mutex_unlock(&runtime->oss.params_lock);
1609 } else if (runtime->oss.period_ptr > 0) {
1611 pcm_dbg(substream->pcm, "sync: period_ptr\n");
1613 size = runtime->oss.period_bytes - runtime->oss.period_ptr;
1614 snd_pcm_format_set_silence(format,
1615 runtime->oss.buffer,
1617 err = snd_pcm_oss_sync1(substream, size);
1619 mutex_unlock(&runtime->oss.params_lock);
1624 * The ALSA's period might be a bit large than OSS one.
1625 * Fill the remain portion of ALSA period with zeros.
1627 size = runtime->control->appl_ptr % runtime->period_size;
1629 size = runtime->period_size - size;
1630 if (runtime->access == SNDRV_PCM_ACCESS_RW_INTERLEAVED)
1631 snd_pcm_lib_write(substream, NULL, size);
1632 else if (runtime->access == SNDRV_PCM_ACCESS_RW_NONINTERLEAVED)
1633 snd_pcm_lib_writev(substream, NULL, size);
1635 mutex_unlock(&runtime->oss.params_lock);
1637 * finish sync: drain the buffer
1640 saved_f_flags = substream->f_flags;
1641 substream->f_flags &= ~O_NONBLOCK;
1642 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DRAIN, NULL);
1643 substream->f_flags = saved_f_flags;
1646 runtime->oss.prepare = 1;
1649 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
1650 if (substream != NULL) {
1651 if ((err = snd_pcm_oss_make_ready(substream)) < 0)
1653 runtime = substream->runtime;
1654 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DROP, NULL);
1657 runtime->oss.buffer_used = 0;
1658 runtime->oss.prepare = 1;
1663 static int snd_pcm_oss_set_rate(struct snd_pcm_oss_file *pcm_oss_file, int rate)
1667 for (idx = 1; idx >= 0; --idx) {
1668 struct snd_pcm_substream *substream = pcm_oss_file->streams[idx];
1669 struct snd_pcm_runtime *runtime;
1670 if (substream == NULL)
1672 runtime = substream->runtime;
1675 else if (rate > 192000)
1677 if (runtime->oss.rate != rate) {
1678 runtime->oss.params = 1;
1679 runtime->oss.rate = rate;
1682 return snd_pcm_oss_get_rate(pcm_oss_file);
1685 static int snd_pcm_oss_get_rate(struct snd_pcm_oss_file *pcm_oss_file)
1687 struct snd_pcm_substream *substream;
1690 if ((err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream)) < 0)
1692 return substream->runtime->oss.rate;
1695 static int snd_pcm_oss_set_channels(struct snd_pcm_oss_file *pcm_oss_file, unsigned int channels)
1702 for (idx = 1; idx >= 0; --idx) {
1703 struct snd_pcm_substream *substream = pcm_oss_file->streams[idx];
1704 struct snd_pcm_runtime *runtime;
1705 if (substream == NULL)
1707 runtime = substream->runtime;
1708 if (runtime->oss.channels != channels) {
1709 runtime->oss.params = 1;
1710 runtime->oss.channels = channels;
1713 return snd_pcm_oss_get_channels(pcm_oss_file);
1716 static int snd_pcm_oss_get_channels(struct snd_pcm_oss_file *pcm_oss_file)
1718 struct snd_pcm_substream *substream;
1721 if ((err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream)) < 0)
1723 return substream->runtime->oss.channels;
1726 static int snd_pcm_oss_get_block_size(struct snd_pcm_oss_file *pcm_oss_file)
1728 struct snd_pcm_substream *substream;
1731 if ((err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream)) < 0)
1733 return substream->runtime->oss.period_bytes;
1736 static int snd_pcm_oss_get_formats(struct snd_pcm_oss_file *pcm_oss_file)
1738 struct snd_pcm_substream *substream;
1741 struct snd_pcm_hw_params *params;
1742 unsigned int formats = 0;
1743 const struct snd_mask *format_mask;
1746 if ((err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream)) < 0)
1748 if (atomic_read(&substream->mmap_count))
1751 direct = substream->oss.setup.direct;
1753 return AFMT_MU_LAW | AFMT_U8 |
1754 AFMT_S16_LE | AFMT_S16_BE |
1755 AFMT_S8 | AFMT_U16_LE |
1757 AFMT_S32_LE | AFMT_S32_BE |
1758 AFMT_S24_LE | AFMT_S24_BE |
1760 params = kmalloc(sizeof(*params), GFP_KERNEL);
1763 _snd_pcm_hw_params_any(params);
1764 err = snd_pcm_hw_refine(substream, params);
1765 format_mask = hw_param_mask_c(params, SNDRV_PCM_HW_PARAM_FORMAT);
1769 for (fmt = 0; fmt < 32; ++fmt) {
1770 if (snd_mask_test(format_mask, fmt)) {
1771 int f = snd_pcm_oss_format_to(fmt);
1779 static int snd_pcm_oss_set_format(struct snd_pcm_oss_file *pcm_oss_file, int format)
1783 if (format != AFMT_QUERY) {
1784 formats = snd_pcm_oss_get_formats(pcm_oss_file);
1787 if (!(formats & format))
1789 for (idx = 1; idx >= 0; --idx) {
1790 struct snd_pcm_substream *substream = pcm_oss_file->streams[idx];
1791 struct snd_pcm_runtime *runtime;
1792 if (substream == NULL)
1794 runtime = substream->runtime;
1795 if (runtime->oss.format != format) {
1796 runtime->oss.params = 1;
1797 runtime->oss.format = format;
1801 return snd_pcm_oss_get_format(pcm_oss_file);
1804 static int snd_pcm_oss_get_format(struct snd_pcm_oss_file *pcm_oss_file)
1806 struct snd_pcm_substream *substream;
1809 if ((err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream)) < 0)
1811 return substream->runtime->oss.format;
1814 static int snd_pcm_oss_set_subdivide1(struct snd_pcm_substream *substream, int subdivide)
1816 struct snd_pcm_runtime *runtime;
1818 if (substream == NULL)
1820 runtime = substream->runtime;
1821 if (subdivide == 0) {
1822 subdivide = runtime->oss.subdivision;
1827 if (runtime->oss.subdivision || runtime->oss.fragshift)
1829 if (subdivide != 1 && subdivide != 2 && subdivide != 4 &&
1830 subdivide != 8 && subdivide != 16)
1832 runtime->oss.subdivision = subdivide;
1833 runtime->oss.params = 1;
1837 static int snd_pcm_oss_set_subdivide(struct snd_pcm_oss_file *pcm_oss_file, int subdivide)
1839 int err = -EINVAL, idx;
1841 for (idx = 1; idx >= 0; --idx) {
1842 struct snd_pcm_substream *substream = pcm_oss_file->streams[idx];
1843 if (substream == NULL)
1845 if ((err = snd_pcm_oss_set_subdivide1(substream, subdivide)) < 0)
1851 static int snd_pcm_oss_set_fragment1(struct snd_pcm_substream *substream, unsigned int val)
1853 struct snd_pcm_runtime *runtime;
1855 if (substream == NULL)
1857 runtime = substream->runtime;
1858 if (runtime->oss.subdivision || runtime->oss.fragshift)
1860 runtime->oss.fragshift = val & 0xffff;
1861 runtime->oss.maxfrags = (val >> 16) & 0xffff;
1862 if (runtime->oss.fragshift < 4) /* < 16 */
1863 runtime->oss.fragshift = 4;
1864 if (runtime->oss.maxfrags < 2)
1865 runtime->oss.maxfrags = 2;
1866 runtime->oss.params = 1;
1870 static int snd_pcm_oss_set_fragment(struct snd_pcm_oss_file *pcm_oss_file, unsigned int val)
1872 int err = -EINVAL, idx;
1874 for (idx = 1; idx >= 0; --idx) {
1875 struct snd_pcm_substream *substream = pcm_oss_file->streams[idx];
1876 if (substream == NULL)
1878 if ((err = snd_pcm_oss_set_fragment1(substream, val)) < 0)
1884 static int snd_pcm_oss_nonblock(struct file * file)
1886 spin_lock(&file->f_lock);
1887 file->f_flags |= O_NONBLOCK;
1888 spin_unlock(&file->f_lock);
1892 static int snd_pcm_oss_get_caps1(struct snd_pcm_substream *substream, int res)
1895 if (substream == NULL) {
1896 res &= ~DSP_CAP_DUPLEX;
1899 #ifdef DSP_CAP_MULTI
1900 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
1901 if (substream->pstr->substream_count > 1)
1902 res |= DSP_CAP_MULTI;
1904 /* DSP_CAP_REALTIME is set all times: */
1905 /* all ALSA drivers can return actual pointer in ring buffer */
1906 #if defined(DSP_CAP_REALTIME) && 0
1908 struct snd_pcm_runtime *runtime = substream->runtime;
1909 if (runtime->info & (SNDRV_PCM_INFO_BLOCK_TRANSFER|SNDRV_PCM_INFO_BATCH))
1910 res &= ~DSP_CAP_REALTIME;
1916 static int snd_pcm_oss_get_caps(struct snd_pcm_oss_file *pcm_oss_file)
1920 result = DSP_CAP_TRIGGER | DSP_CAP_MMAP | DSP_CAP_DUPLEX | DSP_CAP_REALTIME;
1921 for (idx = 0; idx < 2; idx++) {
1922 struct snd_pcm_substream *substream = pcm_oss_file->streams[idx];
1923 result = snd_pcm_oss_get_caps1(substream, result);
1925 result |= 0x0001; /* revision - same as SB AWE 64 */
1929 static void snd_pcm_oss_simulate_fill(struct snd_pcm_substream *substream,
1930 snd_pcm_uframes_t hw_ptr)
1932 struct snd_pcm_runtime *runtime = substream->runtime;
1933 snd_pcm_uframes_t appl_ptr;
1934 appl_ptr = hw_ptr + runtime->buffer_size;
1935 appl_ptr %= runtime->boundary;
1936 runtime->control->appl_ptr = appl_ptr;
1939 static int snd_pcm_oss_set_trigger(struct snd_pcm_oss_file *pcm_oss_file, int trigger)
1941 struct snd_pcm_runtime *runtime;
1942 struct snd_pcm_substream *psubstream = NULL, *csubstream = NULL;
1946 pcm_dbg(substream->pcm, "pcm_oss: trigger = 0x%x\n", trigger);
1949 psubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
1950 csubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
1953 if ((err = snd_pcm_oss_make_ready(psubstream)) < 0)
1957 if ((err = snd_pcm_oss_make_ready(csubstream)) < 0)
1961 runtime = psubstream->runtime;
1962 if (trigger & PCM_ENABLE_OUTPUT) {
1963 if (runtime->oss.trigger)
1965 if (atomic_read(&psubstream->mmap_count))
1966 snd_pcm_oss_simulate_fill(psubstream,
1967 get_hw_ptr_period(runtime));
1968 runtime->oss.trigger = 1;
1969 runtime->start_threshold = 1;
1970 cmd = SNDRV_PCM_IOCTL_START;
1972 if (!runtime->oss.trigger)
1974 runtime->oss.trigger = 0;
1975 runtime->start_threshold = runtime->boundary;
1976 cmd = SNDRV_PCM_IOCTL_DROP;
1977 runtime->oss.prepare = 1;
1979 err = snd_pcm_kernel_ioctl(psubstream, cmd, NULL);
1985 runtime = csubstream->runtime;
1986 if (trigger & PCM_ENABLE_INPUT) {
1987 if (runtime->oss.trigger)
1989 runtime->oss.trigger = 1;
1990 runtime->start_threshold = 1;
1991 cmd = SNDRV_PCM_IOCTL_START;
1993 if (!runtime->oss.trigger)
1995 runtime->oss.trigger = 0;
1996 runtime->start_threshold = runtime->boundary;
1997 cmd = SNDRV_PCM_IOCTL_DROP;
1998 runtime->oss.prepare = 1;
2000 err = snd_pcm_kernel_ioctl(csubstream, cmd, NULL);
2008 static int snd_pcm_oss_get_trigger(struct snd_pcm_oss_file *pcm_oss_file)
2010 struct snd_pcm_substream *psubstream = NULL, *csubstream = NULL;
2013 psubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
2014 csubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
2015 if (psubstream && psubstream->runtime && psubstream->runtime->oss.trigger)
2016 result |= PCM_ENABLE_OUTPUT;
2017 if (csubstream && csubstream->runtime && csubstream->runtime->oss.trigger)
2018 result |= PCM_ENABLE_INPUT;
2022 static int snd_pcm_oss_get_odelay(struct snd_pcm_oss_file *pcm_oss_file)
2024 struct snd_pcm_substream *substream;
2025 struct snd_pcm_runtime *runtime;
2026 snd_pcm_sframes_t delay;
2029 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
2030 if (substream == NULL)
2032 if ((err = snd_pcm_oss_make_ready(substream)) < 0)
2034 runtime = substream->runtime;
2035 if (runtime->oss.params || runtime->oss.prepare)
2037 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DELAY, &delay);
2039 delay = 0; /* hack for broken OSS applications */
2042 return snd_pcm_oss_bytes(substream, delay);
2045 static int snd_pcm_oss_get_ptr(struct snd_pcm_oss_file *pcm_oss_file, int stream, struct count_info __user * _info)
2047 struct snd_pcm_substream *substream;
2048 struct snd_pcm_runtime *runtime;
2049 snd_pcm_sframes_t delay;
2051 struct count_info info;
2056 substream = pcm_oss_file->streams[stream];
2057 if (substream == NULL)
2059 if ((err = snd_pcm_oss_make_ready(substream)) < 0)
2061 runtime = substream->runtime;
2062 if (runtime->oss.params || runtime->oss.prepare) {
2063 memset(&info, 0, sizeof(info));
2064 if (copy_to_user(_info, &info, sizeof(info)))
2068 if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
2069 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DELAY, &delay);
2070 if (err == -EPIPE || err == -ESTRPIPE || (! err && delay < 0)) {
2075 fixup = runtime->oss.buffer_used;
2078 err = snd_pcm_oss_capture_position_fixup(substream, &delay);
2079 fixup = -runtime->oss.buffer_used;
2083 info.ptr = snd_pcm_oss_bytes(substream, runtime->status->hw_ptr % runtime->buffer_size);
2084 if (atomic_read(&substream->mmap_count)) {
2085 snd_pcm_sframes_t n;
2086 delay = get_hw_ptr_period(runtime);
2087 n = delay - runtime->oss.prev_hw_ptr_period;
2089 n += runtime->boundary;
2090 info.blocks = n / runtime->period_size;
2091 runtime->oss.prev_hw_ptr_period = delay;
2092 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
2093 snd_pcm_oss_simulate_fill(substream, delay);
2094 info.bytes = snd_pcm_oss_bytes(substream, runtime->status->hw_ptr) & INT_MAX;
2096 delay = snd_pcm_oss_bytes(substream, delay);
2097 if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
2098 if (substream->oss.setup.buggyptr)
2099 info.blocks = (runtime->oss.buffer_bytes - delay - fixup) / runtime->oss.period_bytes;
2101 info.blocks = (delay + fixup) / runtime->oss.period_bytes;
2102 info.bytes = (runtime->oss.bytes - delay) & INT_MAX;
2105 info.blocks = delay / runtime->oss.period_bytes;
2106 info.bytes = (runtime->oss.bytes + delay) & INT_MAX;
2109 if (copy_to_user(_info, &info, sizeof(info)))
2114 static int snd_pcm_oss_get_space(struct snd_pcm_oss_file *pcm_oss_file, int stream, struct audio_buf_info __user *_info)
2116 struct snd_pcm_substream *substream;
2117 struct snd_pcm_runtime *runtime;
2118 snd_pcm_sframes_t avail;
2120 struct audio_buf_info info;
2125 substream = pcm_oss_file->streams[stream];
2126 if (substream == NULL)
2128 runtime = substream->runtime;
2130 if (runtime->oss.params &&
2131 (err = snd_pcm_oss_change_params(substream, false)) < 0)
2134 info.fragsize = runtime->oss.period_bytes;
2135 info.fragstotal = runtime->periods;
2136 if (runtime->oss.prepare) {
2137 if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
2138 info.bytes = runtime->oss.period_bytes * runtime->oss.periods;
2139 info.fragments = runtime->oss.periods;
2145 if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
2146 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DELAY, &avail);
2147 if (err == -EPIPE || err == -ESTRPIPE || (! err && avail < 0)) {
2148 avail = runtime->buffer_size;
2152 avail = runtime->buffer_size - avail;
2153 fixup = -runtime->oss.buffer_used;
2156 err = snd_pcm_oss_capture_position_fixup(substream, &avail);
2157 fixup = runtime->oss.buffer_used;
2161 info.bytes = snd_pcm_oss_bytes(substream, avail) + fixup;
2162 info.fragments = info.bytes / runtime->oss.period_bytes;
2166 pcm_dbg(substream->pcm,
2167 "pcm_oss: space: bytes = %i, fragments = %i, fragstotal = %i, fragsize = %i\n",
2168 info.bytes, info.fragments, info.fragstotal, info.fragsize);
2170 if (copy_to_user(_info, &info, sizeof(info)))
2175 static int snd_pcm_oss_get_mapbuf(struct snd_pcm_oss_file *pcm_oss_file, int stream, struct buffmem_desc __user * _info)
2177 // it won't be probably implemented
2178 // pr_debug("TODO: snd_pcm_oss_get_mapbuf\n");
2182 static const char *strip_task_path(const char *path)
2184 const char *ptr, *ptrl = NULL;
2185 for (ptr = path; *ptr; ptr++) {
2192 static void snd_pcm_oss_look_for_setup(struct snd_pcm *pcm, int stream,
2193 const char *task_name,
2194 struct snd_pcm_oss_setup *rsetup)
2196 struct snd_pcm_oss_setup *setup;
2198 mutex_lock(&pcm->streams[stream].oss.setup_mutex);
2200 for (setup = pcm->streams[stream].oss.setup_list; setup;
2201 setup = setup->next) {
2202 if (!strcmp(setup->task_name, task_name))
2205 } while ((task_name = strip_task_path(task_name)) != NULL);
2209 mutex_unlock(&pcm->streams[stream].oss.setup_mutex);
2212 static void snd_pcm_oss_release_substream(struct snd_pcm_substream *substream)
2214 struct snd_pcm_runtime *runtime;
2215 runtime = substream->runtime;
2216 vfree(runtime->oss.buffer);
2217 runtime->oss.buffer = NULL;
2218 #ifdef CONFIG_SND_PCM_OSS_PLUGINS
2219 snd_pcm_oss_plugin_clear(substream);
2221 substream->oss.oss = 0;
2224 static void snd_pcm_oss_init_substream(struct snd_pcm_substream *substream,
2225 struct snd_pcm_oss_setup *setup,
2228 struct snd_pcm_runtime *runtime;
2230 substream->oss.oss = 1;
2231 substream->oss.setup = *setup;
2232 if (setup->nonblock)
2233 substream->f_flags |= O_NONBLOCK;
2234 else if (setup->block)
2235 substream->f_flags &= ~O_NONBLOCK;
2236 runtime = substream->runtime;
2237 runtime->oss.params = 1;
2238 runtime->oss.trigger = 1;
2239 runtime->oss.rate = 8000;
2240 mutex_init(&runtime->oss.params_lock);
2241 switch (SNDRV_MINOR_OSS_DEVICE(minor)) {
2242 case SNDRV_MINOR_OSS_PCM_8:
2243 runtime->oss.format = AFMT_U8;
2245 case SNDRV_MINOR_OSS_PCM_16:
2246 runtime->oss.format = AFMT_S16_LE;
2249 runtime->oss.format = AFMT_MU_LAW;
2251 runtime->oss.channels = 1;
2252 runtime->oss.fragshift = 0;
2253 runtime->oss.maxfrags = 0;
2254 runtime->oss.subdivision = 0;
2255 substream->pcm_release = snd_pcm_oss_release_substream;
2258 static int snd_pcm_oss_release_file(struct snd_pcm_oss_file *pcm_oss_file)
2263 for (cidx = 0; cidx < 2; ++cidx) {
2264 struct snd_pcm_substream *substream = pcm_oss_file->streams[cidx];
2266 snd_pcm_release_substream(substream);
2268 kfree(pcm_oss_file);
2272 static int snd_pcm_oss_open_file(struct file *file,
2273 struct snd_pcm *pcm,
2274 struct snd_pcm_oss_file **rpcm_oss_file,
2276 struct snd_pcm_oss_setup *setup)
2279 struct snd_pcm_oss_file *pcm_oss_file;
2280 struct snd_pcm_substream *substream;
2281 fmode_t f_mode = file->f_mode;
2284 *rpcm_oss_file = NULL;
2286 pcm_oss_file = kzalloc(sizeof(*pcm_oss_file), GFP_KERNEL);
2287 if (pcm_oss_file == NULL)
2290 if ((f_mode & (FMODE_WRITE|FMODE_READ)) == (FMODE_WRITE|FMODE_READ) &&
2291 (pcm->info_flags & SNDRV_PCM_INFO_HALF_DUPLEX))
2292 f_mode = FMODE_WRITE;
2294 file->f_flags &= ~O_APPEND;
2295 for (idx = 0; idx < 2; idx++) {
2296 if (setup[idx].disable)
2298 if (! pcm->streams[idx].substream_count)
2299 continue; /* no matching substream */
2300 if (idx == SNDRV_PCM_STREAM_PLAYBACK) {
2301 if (! (f_mode & FMODE_WRITE))
2304 if (! (f_mode & FMODE_READ))
2307 err = snd_pcm_open_substream(pcm, idx, file, &substream);
2309 snd_pcm_oss_release_file(pcm_oss_file);
2313 pcm_oss_file->streams[idx] = substream;
2314 substream->file = pcm_oss_file;
2315 snd_pcm_oss_init_substream(substream, &setup[idx], minor);
2318 if (!pcm_oss_file->streams[0] && !pcm_oss_file->streams[1]) {
2319 snd_pcm_oss_release_file(pcm_oss_file);
2323 file->private_data = pcm_oss_file;
2325 *rpcm_oss_file = pcm_oss_file;
2330 static int snd_task_name(struct task_struct *task, char *name, size_t size)
2334 if (snd_BUG_ON(!task || !name || size < 2))
2336 for (idx = 0; idx < sizeof(task->comm) && idx + 1 < size; idx++)
2337 name[idx] = task->comm[idx];
2342 static int snd_pcm_oss_open(struct inode *inode, struct file *file)
2346 struct snd_pcm *pcm;
2347 struct snd_pcm_oss_file *pcm_oss_file;
2348 struct snd_pcm_oss_setup setup[2];
2350 wait_queue_entry_t wait;
2352 err = nonseekable_open(inode, file);
2356 pcm = snd_lookup_oss_minor_data(iminor(inode),
2357 SNDRV_OSS_DEVICE_TYPE_PCM);
2362 err = snd_card_file_add(pcm->card, file);
2365 if (!try_module_get(pcm->card->module)) {
2369 if (snd_task_name(current, task_name, sizeof(task_name)) < 0) {
2373 memset(setup, 0, sizeof(setup));
2374 if (file->f_mode & FMODE_WRITE)
2375 snd_pcm_oss_look_for_setup(pcm, SNDRV_PCM_STREAM_PLAYBACK,
2376 task_name, &setup[0]);
2377 if (file->f_mode & FMODE_READ)
2378 snd_pcm_oss_look_for_setup(pcm, SNDRV_PCM_STREAM_CAPTURE,
2379 task_name, &setup[1]);
2381 nonblock = !!(file->f_flags & O_NONBLOCK);
2383 nonblock = nonblock_open;
2385 init_waitqueue_entry(&wait, current);
2386 add_wait_queue(&pcm->open_wait, &wait);
2387 mutex_lock(&pcm->open_mutex);
2389 err = snd_pcm_oss_open_file(file, pcm, &pcm_oss_file,
2390 iminor(inode), setup);
2393 if (err == -EAGAIN) {
2400 set_current_state(TASK_INTERRUPTIBLE);
2401 mutex_unlock(&pcm->open_mutex);
2403 mutex_lock(&pcm->open_mutex);
2404 if (pcm->card->shutdown) {
2408 if (signal_pending(current)) {
2413 remove_wait_queue(&pcm->open_wait, &wait);
2414 mutex_unlock(&pcm->open_mutex);
2417 snd_card_unref(pcm->card);
2421 module_put(pcm->card->module);
2423 snd_card_file_remove(pcm->card, file);
2426 snd_card_unref(pcm->card);
2430 static int snd_pcm_oss_release(struct inode *inode, struct file *file)
2432 struct snd_pcm *pcm;
2433 struct snd_pcm_substream *substream;
2434 struct snd_pcm_oss_file *pcm_oss_file;
2436 pcm_oss_file = file->private_data;
2437 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
2438 if (substream == NULL)
2439 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
2440 if (snd_BUG_ON(!substream))
2442 pcm = substream->pcm;
2443 if (!pcm->card->shutdown)
2444 snd_pcm_oss_sync(pcm_oss_file);
2445 mutex_lock(&pcm->open_mutex);
2446 snd_pcm_oss_release_file(pcm_oss_file);
2447 mutex_unlock(&pcm->open_mutex);
2448 wake_up(&pcm->open_wait);
2449 module_put(pcm->card->module);
2450 snd_card_file_remove(pcm->card, file);
2454 static long snd_pcm_oss_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
2456 struct snd_pcm_oss_file *pcm_oss_file;
2457 int __user *p = (int __user *)arg;
2460 pcm_oss_file = file->private_data;
2461 if (cmd == OSS_GETVERSION)
2462 return put_user(SNDRV_OSS_VERSION, p);
2463 if (cmd == OSS_ALSAEMULVER)
2464 return put_user(1, p);
2465 #if IS_REACHABLE(CONFIG_SND_MIXER_OSS)
2466 if (((cmd >> 8) & 0xff) == 'M') { /* mixer ioctl - for OSS compatibility */
2467 struct snd_pcm_substream *substream;
2469 for (idx = 0; idx < 2; ++idx) {
2470 substream = pcm_oss_file->streams[idx];
2471 if (substream != NULL)
2474 if (snd_BUG_ON(idx >= 2))
2476 return snd_mixer_oss_ioctl_card(substream->pcm->card, cmd, arg);
2479 if (((cmd >> 8) & 0xff) != 'P')
2482 pr_debug("pcm_oss: ioctl = 0x%x\n", cmd);
2485 case SNDCTL_DSP_RESET:
2486 return snd_pcm_oss_reset(pcm_oss_file);
2487 case SNDCTL_DSP_SYNC:
2488 return snd_pcm_oss_sync(pcm_oss_file);
2489 case SNDCTL_DSP_SPEED:
2490 if (get_user(res, p))
2492 if ((res = snd_pcm_oss_set_rate(pcm_oss_file, res))<0)
2494 return put_user(res, p);
2495 case SOUND_PCM_READ_RATE:
2496 res = snd_pcm_oss_get_rate(pcm_oss_file);
2499 return put_user(res, p);
2500 case SNDCTL_DSP_STEREO:
2501 if (get_user(res, p))
2503 res = res > 0 ? 2 : 1;
2504 if ((res = snd_pcm_oss_set_channels(pcm_oss_file, res)) < 0)
2506 return put_user(--res, p);
2507 case SNDCTL_DSP_GETBLKSIZE:
2508 res = snd_pcm_oss_get_block_size(pcm_oss_file);
2511 return put_user(res, p);
2512 case SNDCTL_DSP_SETFMT:
2513 if (get_user(res, p))
2515 res = snd_pcm_oss_set_format(pcm_oss_file, res);
2518 return put_user(res, p);
2519 case SOUND_PCM_READ_BITS:
2520 res = snd_pcm_oss_get_format(pcm_oss_file);
2523 return put_user(res, p);
2524 case SNDCTL_DSP_CHANNELS:
2525 if (get_user(res, p))
2527 res = snd_pcm_oss_set_channels(pcm_oss_file, res);
2530 return put_user(res, p);
2531 case SOUND_PCM_READ_CHANNELS:
2532 res = snd_pcm_oss_get_channels(pcm_oss_file);
2535 return put_user(res, p);
2536 case SOUND_PCM_WRITE_FILTER:
2537 case SOUND_PCM_READ_FILTER:
2539 case SNDCTL_DSP_POST:
2540 return snd_pcm_oss_post(pcm_oss_file);
2541 case SNDCTL_DSP_SUBDIVIDE:
2542 if (get_user(res, p))
2544 res = snd_pcm_oss_set_subdivide(pcm_oss_file, res);
2547 return put_user(res, p);
2548 case SNDCTL_DSP_SETFRAGMENT:
2549 if (get_user(res, p))
2551 return snd_pcm_oss_set_fragment(pcm_oss_file, res);
2552 case SNDCTL_DSP_GETFMTS:
2553 res = snd_pcm_oss_get_formats(pcm_oss_file);
2556 return put_user(res, p);
2557 case SNDCTL_DSP_GETOSPACE:
2558 case SNDCTL_DSP_GETISPACE:
2559 return snd_pcm_oss_get_space(pcm_oss_file,
2560 cmd == SNDCTL_DSP_GETISPACE ?
2561 SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK,
2562 (struct audio_buf_info __user *) arg);
2563 case SNDCTL_DSP_NONBLOCK:
2564 return snd_pcm_oss_nonblock(file);
2565 case SNDCTL_DSP_GETCAPS:
2566 res = snd_pcm_oss_get_caps(pcm_oss_file);
2569 return put_user(res, p);
2570 case SNDCTL_DSP_GETTRIGGER:
2571 res = snd_pcm_oss_get_trigger(pcm_oss_file);
2574 return put_user(res, p);
2575 case SNDCTL_DSP_SETTRIGGER:
2576 if (get_user(res, p))
2578 return snd_pcm_oss_set_trigger(pcm_oss_file, res);
2579 case SNDCTL_DSP_GETIPTR:
2580 case SNDCTL_DSP_GETOPTR:
2581 return snd_pcm_oss_get_ptr(pcm_oss_file,
2582 cmd == SNDCTL_DSP_GETIPTR ?
2583 SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK,
2584 (struct count_info __user *) arg);
2585 case SNDCTL_DSP_MAPINBUF:
2586 case SNDCTL_DSP_MAPOUTBUF:
2587 return snd_pcm_oss_get_mapbuf(pcm_oss_file,
2588 cmd == SNDCTL_DSP_MAPINBUF ?
2589 SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK,
2590 (struct buffmem_desc __user *) arg);
2591 case SNDCTL_DSP_SETSYNCRO:
2592 /* stop DMA now.. */
2594 case SNDCTL_DSP_SETDUPLEX:
2595 if (snd_pcm_oss_get_caps(pcm_oss_file) & DSP_CAP_DUPLEX)
2598 case SNDCTL_DSP_GETODELAY:
2599 res = snd_pcm_oss_get_odelay(pcm_oss_file);
2601 /* it's for sure, some broken apps don't check for error codes */
2605 return put_user(res, p);
2606 case SNDCTL_DSP_PROFILE:
2607 return 0; /* silently ignore */
2609 pr_debug("pcm_oss: unknown command = 0x%x\n", cmd);
2614 #ifdef CONFIG_COMPAT
2615 /* all compatible */
2616 static long snd_pcm_oss_ioctl_compat(struct file *file, unsigned int cmd,
2619 return snd_pcm_oss_ioctl(file, cmd, (unsigned long)compat_ptr(arg));
2622 #define snd_pcm_oss_ioctl_compat NULL
2625 static ssize_t snd_pcm_oss_read(struct file *file, char __user *buf, size_t count, loff_t *offset)
2627 struct snd_pcm_oss_file *pcm_oss_file;
2628 struct snd_pcm_substream *substream;
2630 pcm_oss_file = file->private_data;
2631 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
2632 if (substream == NULL)
2634 substream->f_flags = file->f_flags & O_NONBLOCK;
2636 return snd_pcm_oss_read1(substream, buf, count);
2639 ssize_t res = snd_pcm_oss_read1(substream, buf, count);
2640 pcm_dbg(substream->pcm,
2641 "pcm_oss: read %li bytes (returned %li bytes)\n",
2642 (long)count, (long)res);
2648 static ssize_t snd_pcm_oss_write(struct file *file, const char __user *buf, size_t count, loff_t *offset)
2650 struct snd_pcm_oss_file *pcm_oss_file;
2651 struct snd_pcm_substream *substream;
2654 pcm_oss_file = file->private_data;
2655 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
2656 if (substream == NULL)
2658 substream->f_flags = file->f_flags & O_NONBLOCK;
2659 result = snd_pcm_oss_write1(substream, buf, count);
2661 pcm_dbg(substream->pcm, "pcm_oss: write %li bytes (wrote %li bytes)\n",
2662 (long)count, (long)result);
2667 static int snd_pcm_oss_playback_ready(struct snd_pcm_substream *substream)
2669 struct snd_pcm_runtime *runtime = substream->runtime;
2670 if (atomic_read(&substream->mmap_count))
2671 return runtime->oss.prev_hw_ptr_period !=
2672 get_hw_ptr_period(runtime);
2674 return snd_pcm_playback_avail(runtime) >=
2675 runtime->oss.period_frames;
2678 static int snd_pcm_oss_capture_ready(struct snd_pcm_substream *substream)
2680 struct snd_pcm_runtime *runtime = substream->runtime;
2681 if (atomic_read(&substream->mmap_count))
2682 return runtime->oss.prev_hw_ptr_period !=
2683 get_hw_ptr_period(runtime);
2685 return snd_pcm_capture_avail(runtime) >=
2686 runtime->oss.period_frames;
2689 static __poll_t snd_pcm_oss_poll(struct file *file, poll_table * wait)
2691 struct snd_pcm_oss_file *pcm_oss_file;
2693 struct snd_pcm_substream *psubstream = NULL, *csubstream = NULL;
2695 pcm_oss_file = file->private_data;
2697 psubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
2698 csubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
2701 if (psubstream != NULL) {
2702 struct snd_pcm_runtime *runtime = psubstream->runtime;
2703 poll_wait(file, &runtime->sleep, wait);
2704 snd_pcm_stream_lock_irq(psubstream);
2705 if (runtime->status->state != SNDRV_PCM_STATE_DRAINING &&
2706 (runtime->status->state != SNDRV_PCM_STATE_RUNNING ||
2707 snd_pcm_oss_playback_ready(psubstream)))
2708 mask |= POLLOUT | POLLWRNORM;
2709 snd_pcm_stream_unlock_irq(psubstream);
2711 if (csubstream != NULL) {
2712 struct snd_pcm_runtime *runtime = csubstream->runtime;
2713 snd_pcm_state_t ostate;
2714 poll_wait(file, &runtime->sleep, wait);
2715 snd_pcm_stream_lock_irq(csubstream);
2716 if ((ostate = runtime->status->state) != SNDRV_PCM_STATE_RUNNING ||
2717 snd_pcm_oss_capture_ready(csubstream))
2718 mask |= POLLIN | POLLRDNORM;
2719 snd_pcm_stream_unlock_irq(csubstream);
2720 if (ostate != SNDRV_PCM_STATE_RUNNING && runtime->oss.trigger) {
2721 struct snd_pcm_oss_file ofile;
2722 memset(&ofile, 0, sizeof(ofile));
2723 ofile.streams[SNDRV_PCM_STREAM_CAPTURE] = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
2724 runtime->oss.trigger = 0;
2725 snd_pcm_oss_set_trigger(&ofile, PCM_ENABLE_INPUT);
2732 static int snd_pcm_oss_mmap(struct file *file, struct vm_area_struct *area)
2734 struct snd_pcm_oss_file *pcm_oss_file;
2735 struct snd_pcm_substream *substream = NULL;
2736 struct snd_pcm_runtime *runtime;
2740 pr_debug("pcm_oss: mmap begin\n");
2742 pcm_oss_file = file->private_data;
2743 switch ((area->vm_flags & (VM_READ | VM_WRITE))) {
2744 case VM_READ | VM_WRITE:
2745 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
2750 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
2753 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
2758 /* set VM_READ access as well to fix memset() routines that do
2759 reads before writes (to improve performance) */
2760 area->vm_flags |= VM_READ;
2761 if (substream == NULL)
2763 runtime = substream->runtime;
2764 if (!(runtime->info & SNDRV_PCM_INFO_MMAP_VALID))
2766 if (runtime->info & SNDRV_PCM_INFO_INTERLEAVED)
2767 runtime->access = SNDRV_PCM_ACCESS_MMAP_INTERLEAVED;
2771 if (runtime->oss.params) {
2772 /* use mutex_trylock() for params_lock for avoiding a deadlock
2773 * between mmap_sem and params_lock taken by
2774 * copy_from/to_user() in snd_pcm_oss_write/read()
2776 err = snd_pcm_oss_change_params(substream, true);
2780 #ifdef CONFIG_SND_PCM_OSS_PLUGINS
2781 if (runtime->oss.plugin_first != NULL)
2785 if (area->vm_pgoff != 0)
2788 err = snd_pcm_mmap_data(substream, file, area);
2791 runtime->oss.mmap_bytes = area->vm_end - area->vm_start;
2792 runtime->silence_threshold = 0;
2793 runtime->silence_size = 0;
2795 pr_debug("pcm_oss: mmap ok, bytes = 0x%x\n",
2796 runtime->oss.mmap_bytes);
2798 /* In mmap mode we never stop */
2799 runtime->stop_threshold = runtime->boundary;
2804 #ifdef CONFIG_SND_VERBOSE_PROCFS
2809 static void snd_pcm_oss_proc_read(struct snd_info_entry *entry,
2810 struct snd_info_buffer *buffer)
2812 struct snd_pcm_str *pstr = entry->private_data;
2813 struct snd_pcm_oss_setup *setup = pstr->oss.setup_list;
2814 mutex_lock(&pstr->oss.setup_mutex);
2816 snd_iprintf(buffer, "%s %u %u%s%s%s%s%s%s\n",
2820 setup->disable ? " disable" : "",
2821 setup->direct ? " direct" : "",
2822 setup->block ? " block" : "",
2823 setup->nonblock ? " non-block" : "",
2824 setup->partialfrag ? " partial-frag" : "",
2825 setup->nosilence ? " no-silence" : "");
2826 setup = setup->next;
2828 mutex_unlock(&pstr->oss.setup_mutex);
2831 static void snd_pcm_oss_proc_free_setup_list(struct snd_pcm_str * pstr)
2833 struct snd_pcm_oss_setup *setup, *setupn;
2835 for (setup = pstr->oss.setup_list, pstr->oss.setup_list = NULL;
2836 setup; setup = setupn) {
2837 setupn = setup->next;
2838 kfree(setup->task_name);
2841 pstr->oss.setup_list = NULL;
2844 static void snd_pcm_oss_proc_write(struct snd_info_entry *entry,
2845 struct snd_info_buffer *buffer)
2847 struct snd_pcm_str *pstr = entry->private_data;
2848 char line[128], str[32], task_name[32];
2851 struct snd_pcm_oss_setup *setup, *setup1, template;
2853 while (!snd_info_get_line(buffer, line, sizeof(line))) {
2854 mutex_lock(&pstr->oss.setup_mutex);
2855 memset(&template, 0, sizeof(template));
2856 ptr = snd_info_get_str(task_name, line, sizeof(task_name));
2857 if (!strcmp(task_name, "clear") || !strcmp(task_name, "erase")) {
2858 snd_pcm_oss_proc_free_setup_list(pstr);
2859 mutex_unlock(&pstr->oss.setup_mutex);
2862 for (setup = pstr->oss.setup_list; setup; setup = setup->next) {
2863 if (!strcmp(setup->task_name, task_name)) {
2868 ptr = snd_info_get_str(str, ptr, sizeof(str));
2869 template.periods = simple_strtoul(str, NULL, 10);
2870 ptr = snd_info_get_str(str, ptr, sizeof(str));
2871 template.period_size = simple_strtoul(str, NULL, 10);
2872 for (idx1 = 31; idx1 >= 0; idx1--)
2873 if (template.period_size & (1 << idx1))
2875 for (idx1--; idx1 >= 0; idx1--)
2876 template.period_size &= ~(1 << idx1);
2878 ptr = snd_info_get_str(str, ptr, sizeof(str));
2879 if (!strcmp(str, "disable")) {
2880 template.disable = 1;
2881 } else if (!strcmp(str, "direct")) {
2882 template.direct = 1;
2883 } else if (!strcmp(str, "block")) {
2885 } else if (!strcmp(str, "non-block")) {
2886 template.nonblock = 1;
2887 } else if (!strcmp(str, "partial-frag")) {
2888 template.partialfrag = 1;
2889 } else if (!strcmp(str, "no-silence")) {
2890 template.nosilence = 1;
2891 } else if (!strcmp(str, "buggy-ptr")) {
2892 template.buggyptr = 1;
2895 if (setup == NULL) {
2896 setup = kmalloc(sizeof(*setup), GFP_KERNEL);
2898 buffer->error = -ENOMEM;
2899 mutex_unlock(&pstr->oss.setup_mutex);
2902 if (pstr->oss.setup_list == NULL)
2903 pstr->oss.setup_list = setup;
2905 for (setup1 = pstr->oss.setup_list;
2906 setup1->next; setup1 = setup1->next);
2907 setup1->next = setup;
2909 template.task_name = kstrdup(task_name, GFP_KERNEL);
2910 if (! template.task_name) {
2912 buffer->error = -ENOMEM;
2913 mutex_unlock(&pstr->oss.setup_mutex);
2918 mutex_unlock(&pstr->oss.setup_mutex);
2922 static void snd_pcm_oss_proc_init(struct snd_pcm *pcm)
2925 for (stream = 0; stream < 2; ++stream) {
2926 struct snd_info_entry *entry;
2927 struct snd_pcm_str *pstr = &pcm->streams[stream];
2928 if (pstr->substream_count == 0)
2930 if ((entry = snd_info_create_card_entry(pcm->card, "oss", pstr->proc_root)) != NULL) {
2931 entry->content = SNDRV_INFO_CONTENT_TEXT;
2932 entry->mode = S_IFREG | S_IRUGO | S_IWUSR;
2933 entry->c.text.read = snd_pcm_oss_proc_read;
2934 entry->c.text.write = snd_pcm_oss_proc_write;
2935 entry->private_data = pstr;
2936 if (snd_info_register(entry) < 0) {
2937 snd_info_free_entry(entry);
2941 pstr->oss.proc_entry = entry;
2945 static void snd_pcm_oss_proc_done(struct snd_pcm *pcm)
2948 for (stream = 0; stream < 2; ++stream) {
2949 struct snd_pcm_str *pstr = &pcm->streams[stream];
2950 snd_info_free_entry(pstr->oss.proc_entry);
2951 pstr->oss.proc_entry = NULL;
2952 snd_pcm_oss_proc_free_setup_list(pstr);
2955 #else /* !CONFIG_SND_VERBOSE_PROCFS */
2956 #define snd_pcm_oss_proc_init(pcm)
2957 #define snd_pcm_oss_proc_done(pcm)
2958 #endif /* CONFIG_SND_VERBOSE_PROCFS */
2964 static const struct file_operations snd_pcm_oss_f_reg =
2966 .owner = THIS_MODULE,
2967 .read = snd_pcm_oss_read,
2968 .write = snd_pcm_oss_write,
2969 .open = snd_pcm_oss_open,
2970 .release = snd_pcm_oss_release,
2971 .llseek = no_llseek,
2972 .poll = snd_pcm_oss_poll,
2973 .unlocked_ioctl = snd_pcm_oss_ioctl,
2974 .compat_ioctl = snd_pcm_oss_ioctl_compat,
2975 .mmap = snd_pcm_oss_mmap,
2978 static void register_oss_dsp(struct snd_pcm *pcm, int index)
2980 if (snd_register_oss_device(SNDRV_OSS_DEVICE_TYPE_PCM,
2981 pcm->card, index, &snd_pcm_oss_f_reg,
2983 pcm_err(pcm, "unable to register OSS PCM device %i:%i\n",
2984 pcm->card->number, pcm->device);
2988 static int snd_pcm_oss_register_minor(struct snd_pcm *pcm)
2991 if (dsp_map[pcm->card->number] == (int)pcm->device) {
2994 register_oss_dsp(pcm, 0);
2995 duplex = (pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream_count > 0 &&
2996 pcm->streams[SNDRV_PCM_STREAM_CAPTURE].substream_count &&
2997 !(pcm->info_flags & SNDRV_PCM_INFO_HALF_DUPLEX));
2998 sprintf(name, "%s%s", pcm->name, duplex ? " (DUPLEX)" : "");
2999 #ifdef SNDRV_OSS_INFO_DEV_AUDIO
3000 snd_oss_info_register(SNDRV_OSS_INFO_DEV_AUDIO,
3005 pcm->oss.reg_mask |= 1;
3007 if (adsp_map[pcm->card->number] == (int)pcm->device) {
3008 register_oss_dsp(pcm, 1);
3010 pcm->oss.reg_mask |= 2;
3014 snd_pcm_oss_proc_init(pcm);
3019 static int snd_pcm_oss_disconnect_minor(struct snd_pcm *pcm)
3022 if (pcm->oss.reg_mask & 1) {
3023 pcm->oss.reg_mask &= ~1;
3024 snd_unregister_oss_device(SNDRV_OSS_DEVICE_TYPE_PCM,
3027 if (pcm->oss.reg_mask & 2) {
3028 pcm->oss.reg_mask &= ~2;
3029 snd_unregister_oss_device(SNDRV_OSS_DEVICE_TYPE_PCM,
3032 if (dsp_map[pcm->card->number] == (int)pcm->device) {
3033 #ifdef SNDRV_OSS_INFO_DEV_AUDIO
3034 snd_oss_info_unregister(SNDRV_OSS_INFO_DEV_AUDIO, pcm->card->number);
3042 static int snd_pcm_oss_unregister_minor(struct snd_pcm *pcm)
3044 snd_pcm_oss_disconnect_minor(pcm);
3045 snd_pcm_oss_proc_done(pcm);
3049 static struct snd_pcm_notify snd_pcm_oss_notify =
3051 .n_register = snd_pcm_oss_register_minor,
3052 .n_disconnect = snd_pcm_oss_disconnect_minor,
3053 .n_unregister = snd_pcm_oss_unregister_minor,
3056 static int __init alsa_pcm_oss_init(void)
3061 /* check device map table */
3062 for (i = 0; i < SNDRV_CARDS; i++) {
3063 if (dsp_map[i] < 0 || dsp_map[i] >= SNDRV_PCM_DEVICES) {
3064 pr_err("ALSA: pcm_oss: invalid dsp_map[%d] = %d\n",
3068 if (adsp_map[i] < 0 || adsp_map[i] >= SNDRV_PCM_DEVICES) {
3069 pr_err("ALSA: pcm_oss: invalid adsp_map[%d] = %d\n",
3074 if ((err = snd_pcm_notify(&snd_pcm_oss_notify, 0)) < 0)
3079 static void __exit alsa_pcm_oss_exit(void)
3081 snd_pcm_notify(&snd_pcm_oss_notify, 1);
3084 module_init(alsa_pcm_oss_init)
3085 module_exit(alsa_pcm_oss_exit)