1 // SPDX-License-Identifier: GPL-2.0-or-later
3 * Digital Audio (PCM) abstract layer / OSS compatible
4 * Copyright (c) by Jaroslav Kysela <perex@perex.cz>
14 #include <linux/init.h>
15 #include <linux/slab.h>
16 #include <linux/sched/signal.h>
17 #include <linux/time.h>
18 #include <linux/vmalloc.h>
19 #include <linux/module.h>
20 #include <linux/math64.h>
21 #include <linux/string.h>
22 #include <linux/compat.h>
23 #include <sound/core.h>
24 #include <sound/minors.h>
25 #include <sound/pcm.h>
26 #include <sound/pcm_params.h>
27 #include "pcm_plugin.h"
28 #include <sound/info.h>
29 #include <linux/soundcard.h>
30 #include <sound/initval.h>
31 #include <sound/mixer_oss.h>
33 #define OSS_ALSAEMULVER _SIOR ('M', 249, int)
35 static int dsp_map[SNDRV_CARDS];
36 static int adsp_map[SNDRV_CARDS] = {[0 ... (SNDRV_CARDS-1)] = 1};
37 static bool nonblock_open = 1;
39 MODULE_AUTHOR("Jaroslav Kysela <perex@perex.cz>, Abramo Bagnara <abramo@alsa-project.org>");
40 MODULE_DESCRIPTION("PCM OSS emulation for ALSA.");
41 MODULE_LICENSE("GPL");
42 module_param_array(dsp_map, int, NULL, 0444);
43 MODULE_PARM_DESC(dsp_map, "PCM device number assigned to 1st OSS device.");
44 module_param_array(adsp_map, int, NULL, 0444);
45 MODULE_PARM_DESC(adsp_map, "PCM device number assigned to 2nd OSS device.");
46 module_param(nonblock_open, bool, 0644);
47 MODULE_PARM_DESC(nonblock_open, "Don't block opening busy PCM devices.");
48 MODULE_ALIAS_SNDRV_MINOR(SNDRV_MINOR_OSS_PCM);
49 MODULE_ALIAS_SNDRV_MINOR(SNDRV_MINOR_OSS_PCM1);
51 static int snd_pcm_oss_get_rate(struct snd_pcm_oss_file *pcm_oss_file);
52 static int snd_pcm_oss_get_channels(struct snd_pcm_oss_file *pcm_oss_file);
53 static int snd_pcm_oss_get_format(struct snd_pcm_oss_file *pcm_oss_file);
56 * helper functions to process hw_params
58 static int snd_interval_refine_min(struct snd_interval *i, unsigned int min, int openmin)
65 } else if (i->min == min && !i->openmin && openmin) {
75 if (snd_interval_checkempty(i)) {
82 static int snd_interval_refine_max(struct snd_interval *i, unsigned int max, int openmax)
89 } else if (i->max == max && !i->openmax && openmax) {
99 if (snd_interval_checkempty(i)) {
100 snd_interval_none(i);
106 static int snd_interval_refine_set(struct snd_interval *i, unsigned int val)
108 struct snd_interval t;
111 t.openmin = t.openmax = 0;
113 return snd_interval_refine(i, &t);
117 * snd_pcm_hw_param_value_min
118 * @params: the hw_params instance
119 * @var: parameter to retrieve
120 * @dir: pointer to the direction (-1,0,1) or NULL
122 * Return the minimum value for field PAR.
125 snd_pcm_hw_param_value_min(const struct snd_pcm_hw_params *params,
126 snd_pcm_hw_param_t var, int *dir)
128 if (hw_is_mask(var)) {
131 return snd_mask_min(hw_param_mask_c(params, var));
133 if (hw_is_interval(var)) {
134 const struct snd_interval *i = hw_param_interval_c(params, var);
137 return snd_interval_min(i);
143 * snd_pcm_hw_param_value_max
144 * @params: the hw_params instance
145 * @var: parameter to retrieve
146 * @dir: pointer to the direction (-1,0,1) or NULL
148 * Return the maximum value for field PAR.
151 snd_pcm_hw_param_value_max(const struct snd_pcm_hw_params *params,
152 snd_pcm_hw_param_t var, int *dir)
154 if (hw_is_mask(var)) {
157 return snd_mask_max(hw_param_mask_c(params, var));
159 if (hw_is_interval(var)) {
160 const struct snd_interval *i = hw_param_interval_c(params, var);
162 *dir = - (int) i->openmax;
163 return snd_interval_max(i);
168 static int _snd_pcm_hw_param_mask(struct snd_pcm_hw_params *params,
169 snd_pcm_hw_param_t var,
170 const struct snd_mask *val)
173 changed = snd_mask_refine(hw_param_mask(params, var), val);
175 params->cmask |= 1 << var;
176 params->rmask |= 1 << var;
181 static int snd_pcm_hw_param_mask(struct snd_pcm_substream *pcm,
182 struct snd_pcm_hw_params *params,
183 snd_pcm_hw_param_t var,
184 const struct snd_mask *val)
186 int changed = _snd_pcm_hw_param_mask(params, var, val);
190 int err = snd_pcm_hw_refine(pcm, params);
197 static int _snd_pcm_hw_param_min(struct snd_pcm_hw_params *params,
198 snd_pcm_hw_param_t var, unsigned int val,
206 } else if (dir < 0) {
214 changed = snd_mask_refine_min(hw_param_mask(params, var),
216 else if (hw_is_interval(var))
217 changed = snd_interval_refine_min(hw_param_interval(params, var),
222 params->cmask |= 1 << var;
223 params->rmask |= 1 << var;
229 * snd_pcm_hw_param_min
231 * @params: the hw_params instance
232 * @var: parameter to retrieve
233 * @val: minimal value
234 * @dir: pointer to the direction (-1,0,1) or NULL
236 * Inside configuration space defined by PARAMS remove from PAR all
237 * values < VAL. Reduce configuration space accordingly.
238 * Return new minimum or -EINVAL if the configuration space is empty
240 static int snd_pcm_hw_param_min(struct snd_pcm_substream *pcm,
241 struct snd_pcm_hw_params *params,
242 snd_pcm_hw_param_t var, unsigned int val,
245 int changed = _snd_pcm_hw_param_min(params, var, val, dir ? *dir : 0);
249 int err = snd_pcm_hw_refine(pcm, params);
253 return snd_pcm_hw_param_value_min(params, var, dir);
256 static int _snd_pcm_hw_param_max(struct snd_pcm_hw_params *params,
257 snd_pcm_hw_param_t var, unsigned int val,
265 } else if (dir > 0) {
270 if (hw_is_mask(var)) {
271 if (val == 0 && open) {
272 snd_mask_none(hw_param_mask(params, var));
275 changed = snd_mask_refine_max(hw_param_mask(params, var),
277 } else if (hw_is_interval(var))
278 changed = snd_interval_refine_max(hw_param_interval(params, var),
283 params->cmask |= 1 << var;
284 params->rmask |= 1 << var;
290 * snd_pcm_hw_param_max
292 * @params: the hw_params instance
293 * @var: parameter to retrieve
294 * @val: maximal value
295 * @dir: pointer to the direction (-1,0,1) or NULL
297 * Inside configuration space defined by PARAMS remove from PAR all
298 * values >= VAL + 1. Reduce configuration space accordingly.
299 * Return new maximum or -EINVAL if the configuration space is empty
301 static int snd_pcm_hw_param_max(struct snd_pcm_substream *pcm,
302 struct snd_pcm_hw_params *params,
303 snd_pcm_hw_param_t var, unsigned int val,
306 int changed = _snd_pcm_hw_param_max(params, var, val, dir ? *dir : 0);
310 int err = snd_pcm_hw_refine(pcm, params);
314 return snd_pcm_hw_param_value_max(params, var, dir);
317 static int boundary_sub(int a, int adir,
321 adir = adir < 0 ? -1 : (adir > 0 ? 1 : 0);
322 bdir = bdir < 0 ? -1 : (bdir > 0 ? 1 : 0);
327 } else if (*cdir == 2) {
333 static int boundary_lt(unsigned int a, int adir,
334 unsigned int b, int bdir)
346 return a < b || (a == b && adir < bdir);
349 /* Return 1 if min is nearer to best than max */
350 static int boundary_nearer(int min, int mindir,
351 int best, int bestdir,
356 boundary_sub(best, bestdir, min, mindir, &dmin, &dmindir);
357 boundary_sub(max, maxdir, best, bestdir, &dmax, &dmaxdir);
358 return boundary_lt(dmin, dmindir, dmax, dmaxdir);
362 * snd_pcm_hw_param_near
364 * @params: the hw_params instance
365 * @var: parameter to retrieve
366 * @best: value to set
367 * @dir: pointer to the direction (-1,0,1) or NULL
369 * Inside configuration space defined by PARAMS set PAR to the available value
370 * nearest to VAL. Reduce configuration space accordingly.
371 * This function cannot be called for SNDRV_PCM_HW_PARAM_ACCESS,
372 * SNDRV_PCM_HW_PARAM_FORMAT, SNDRV_PCM_HW_PARAM_SUBFORMAT.
373 * Return the value found.
375 static int snd_pcm_hw_param_near(struct snd_pcm_substream *pcm,
376 struct snd_pcm_hw_params *params,
377 snd_pcm_hw_param_t var, unsigned int best,
380 struct snd_pcm_hw_params *save = NULL;
382 unsigned int saved_min;
386 int valdir = dir ? *dir : 0;
391 mindir = maxdir = valdir;
394 else if (maxdir == 0)
400 save = kmalloc(sizeof(*save), GFP_KERNEL);
405 min = snd_pcm_hw_param_min(pcm, params, var, min, &mindir);
407 struct snd_pcm_hw_params *params1;
410 if ((unsigned int)min == saved_min && mindir == valdir)
412 params1 = kmalloc(sizeof(*params1), GFP_KERNEL);
413 if (params1 == NULL) {
418 max = snd_pcm_hw_param_max(pcm, params1, var, max, &maxdir);
423 if (boundary_nearer(max, maxdir, best, valdir, min, mindir)) {
430 max = snd_pcm_hw_param_max(pcm, params, var, max, &maxdir);
440 v = snd_pcm_hw_param_last(pcm, params, var, dir);
442 v = snd_pcm_hw_param_first(pcm, params, var, dir);
446 static int _snd_pcm_hw_param_set(struct snd_pcm_hw_params *params,
447 snd_pcm_hw_param_t var, unsigned int val,
451 if (hw_is_mask(var)) {
452 struct snd_mask *m = hw_param_mask(params, var);
453 if (val == 0 && dir < 0) {
461 changed = snd_mask_refine_set(hw_param_mask(params, var), val);
463 } else if (hw_is_interval(var)) {
464 struct snd_interval *i = hw_param_interval(params, var);
465 if (val == 0 && dir < 0) {
467 snd_interval_none(i);
469 changed = snd_interval_refine_set(i, val);
471 struct snd_interval t;
483 changed = snd_interval_refine(i, &t);
488 params->cmask |= 1 << var;
489 params->rmask |= 1 << var;
495 * snd_pcm_hw_param_set
497 * @params: the hw_params instance
498 * @var: parameter to retrieve
500 * @dir: pointer to the direction (-1,0,1) or NULL
502 * Inside configuration space defined by PARAMS remove from PAR all
503 * values != VAL. Reduce configuration space accordingly.
504 * Return VAL or -EINVAL if the configuration space is empty
506 static int snd_pcm_hw_param_set(struct snd_pcm_substream *pcm,
507 struct snd_pcm_hw_params *params,
508 snd_pcm_hw_param_t var, unsigned int val,
511 int changed = _snd_pcm_hw_param_set(params, var, val, dir);
515 int err = snd_pcm_hw_refine(pcm, params);
519 return snd_pcm_hw_param_value(params, var, NULL);
522 static int _snd_pcm_hw_param_setinteger(struct snd_pcm_hw_params *params,
523 snd_pcm_hw_param_t var)
526 changed = snd_interval_setinteger(hw_param_interval(params, var));
528 params->cmask |= 1 << var;
529 params->rmask |= 1 << var;
538 #ifdef CONFIG_SND_PCM_OSS_PLUGINS
539 static int snd_pcm_oss_plugin_clear(struct snd_pcm_substream *substream)
541 struct snd_pcm_runtime *runtime = substream->runtime;
542 struct snd_pcm_plugin *plugin, *next;
544 plugin = runtime->oss.plugin_first;
547 snd_pcm_plugin_free(plugin);
550 runtime->oss.plugin_first = runtime->oss.plugin_last = NULL;
554 static int snd_pcm_plugin_insert(struct snd_pcm_plugin *plugin)
556 struct snd_pcm_runtime *runtime = plugin->plug->runtime;
557 plugin->next = runtime->oss.plugin_first;
559 if (runtime->oss.plugin_first) {
560 runtime->oss.plugin_first->prev = plugin;
561 runtime->oss.plugin_first = plugin;
563 runtime->oss.plugin_last =
564 runtime->oss.plugin_first = plugin;
569 int snd_pcm_plugin_append(struct snd_pcm_plugin *plugin)
571 struct snd_pcm_runtime *runtime = plugin->plug->runtime;
573 plugin->prev = runtime->oss.plugin_last;
574 if (runtime->oss.plugin_last) {
575 runtime->oss.plugin_last->next = plugin;
576 runtime->oss.plugin_last = plugin;
578 runtime->oss.plugin_last =
579 runtime->oss.plugin_first = plugin;
583 #endif /* CONFIG_SND_PCM_OSS_PLUGINS */
585 static long snd_pcm_oss_bytes(struct snd_pcm_substream *substream, long frames)
587 struct snd_pcm_runtime *runtime = substream->runtime;
588 long buffer_size = snd_pcm_lib_buffer_bytes(substream);
589 long bytes = frames_to_bytes(runtime, frames);
590 if (buffer_size == runtime->oss.buffer_bytes)
592 #if BITS_PER_LONG >= 64
593 return runtime->oss.buffer_bytes * bytes / buffer_size;
596 u64 bsize = (u64)runtime->oss.buffer_bytes * (u64)bytes;
597 return div_u64(bsize, buffer_size);
602 static long snd_pcm_alsa_frames(struct snd_pcm_substream *substream, long bytes)
604 struct snd_pcm_runtime *runtime = substream->runtime;
605 long buffer_size = snd_pcm_lib_buffer_bytes(substream);
606 if (buffer_size == runtime->oss.buffer_bytes)
607 return bytes_to_frames(runtime, bytes);
608 return bytes_to_frames(runtime, (buffer_size * bytes) / runtime->oss.buffer_bytes);
612 snd_pcm_uframes_t get_hw_ptr_period(struct snd_pcm_runtime *runtime)
614 return runtime->hw_ptr_interrupt;
617 /* define extended formats in the recent OSS versions (if any) */
619 #define AFMT_S32_LE 0x00001000
620 #define AFMT_S32_BE 0x00002000
621 #define AFMT_S24_LE 0x00008000
622 #define AFMT_S24_BE 0x00010000
623 #define AFMT_S24_PACKED 0x00040000
625 /* other supported formats */
626 #define AFMT_FLOAT 0x00004000
627 #define AFMT_SPDIF_RAW 0x00020000
629 /* unsupported formats */
630 #define AFMT_AC3 0x00000400
631 #define AFMT_VORBIS 0x00000800
633 static snd_pcm_format_t snd_pcm_oss_format_from(int format)
636 case AFMT_MU_LAW: return SNDRV_PCM_FORMAT_MU_LAW;
637 case AFMT_A_LAW: return SNDRV_PCM_FORMAT_A_LAW;
638 case AFMT_IMA_ADPCM: return SNDRV_PCM_FORMAT_IMA_ADPCM;
639 case AFMT_U8: return SNDRV_PCM_FORMAT_U8;
640 case AFMT_S16_LE: return SNDRV_PCM_FORMAT_S16_LE;
641 case AFMT_S16_BE: return SNDRV_PCM_FORMAT_S16_BE;
642 case AFMT_S8: return SNDRV_PCM_FORMAT_S8;
643 case AFMT_U16_LE: return SNDRV_PCM_FORMAT_U16_LE;
644 case AFMT_U16_BE: return SNDRV_PCM_FORMAT_U16_BE;
645 case AFMT_MPEG: return SNDRV_PCM_FORMAT_MPEG;
646 case AFMT_S32_LE: return SNDRV_PCM_FORMAT_S32_LE;
647 case AFMT_S32_BE: return SNDRV_PCM_FORMAT_S32_BE;
648 case AFMT_S24_LE: return SNDRV_PCM_FORMAT_S24_LE;
649 case AFMT_S24_BE: return SNDRV_PCM_FORMAT_S24_BE;
650 case AFMT_S24_PACKED: return SNDRV_PCM_FORMAT_S24_3LE;
651 case AFMT_FLOAT: return SNDRV_PCM_FORMAT_FLOAT;
652 case AFMT_SPDIF_RAW: return SNDRV_PCM_FORMAT_IEC958_SUBFRAME;
653 default: return SNDRV_PCM_FORMAT_U8;
657 static int snd_pcm_oss_format_to(snd_pcm_format_t format)
660 case SNDRV_PCM_FORMAT_MU_LAW: return AFMT_MU_LAW;
661 case SNDRV_PCM_FORMAT_A_LAW: return AFMT_A_LAW;
662 case SNDRV_PCM_FORMAT_IMA_ADPCM: return AFMT_IMA_ADPCM;
663 case SNDRV_PCM_FORMAT_U8: return AFMT_U8;
664 case SNDRV_PCM_FORMAT_S16_LE: return AFMT_S16_LE;
665 case SNDRV_PCM_FORMAT_S16_BE: return AFMT_S16_BE;
666 case SNDRV_PCM_FORMAT_S8: return AFMT_S8;
667 case SNDRV_PCM_FORMAT_U16_LE: return AFMT_U16_LE;
668 case SNDRV_PCM_FORMAT_U16_BE: return AFMT_U16_BE;
669 case SNDRV_PCM_FORMAT_MPEG: return AFMT_MPEG;
670 case SNDRV_PCM_FORMAT_S32_LE: return AFMT_S32_LE;
671 case SNDRV_PCM_FORMAT_S32_BE: return AFMT_S32_BE;
672 case SNDRV_PCM_FORMAT_S24_LE: return AFMT_S24_LE;
673 case SNDRV_PCM_FORMAT_S24_BE: return AFMT_S24_BE;
674 case SNDRV_PCM_FORMAT_S24_3LE: return AFMT_S24_PACKED;
675 case SNDRV_PCM_FORMAT_FLOAT: return AFMT_FLOAT;
676 case SNDRV_PCM_FORMAT_IEC958_SUBFRAME: return AFMT_SPDIF_RAW;
677 default: return -EINVAL;
681 static int snd_pcm_oss_period_size(struct snd_pcm_substream *substream,
682 struct snd_pcm_hw_params *oss_params,
683 struct snd_pcm_hw_params *slave_params)
686 ssize_t oss_buffer_size;
687 ssize_t oss_period_size, oss_periods;
688 ssize_t min_period_size, max_period_size;
689 struct snd_pcm_runtime *runtime = substream->runtime;
690 size_t oss_frame_size;
692 oss_frame_size = snd_pcm_format_physical_width(params_format(oss_params)) *
693 params_channels(oss_params) / 8;
695 oss_buffer_size = snd_pcm_hw_param_value_max(slave_params,
696 SNDRV_PCM_HW_PARAM_BUFFER_SIZE,
698 if (oss_buffer_size <= 0)
700 oss_buffer_size = snd_pcm_plug_client_size(substream,
701 oss_buffer_size * oss_frame_size);
702 if (oss_buffer_size <= 0)
704 oss_buffer_size = rounddown_pow_of_two(oss_buffer_size);
705 if (atomic_read(&substream->mmap_count)) {
706 if (oss_buffer_size > runtime->oss.mmap_bytes)
707 oss_buffer_size = runtime->oss.mmap_bytes;
710 if (substream->oss.setup.period_size > 16)
711 oss_period_size = substream->oss.setup.period_size;
712 else if (runtime->oss.fragshift) {
713 oss_period_size = 1 << runtime->oss.fragshift;
714 if (oss_period_size > oss_buffer_size / 2)
715 oss_period_size = oss_buffer_size / 2;
718 size_t bytes_per_sec = params_rate(oss_params) * snd_pcm_format_physical_width(params_format(oss_params)) * params_channels(oss_params) / 8;
720 oss_period_size = oss_buffer_size;
722 oss_period_size /= 2;
723 } while (oss_period_size > bytes_per_sec);
724 if (runtime->oss.subdivision == 0) {
726 if (oss_period_size / sd > 4096)
728 if (oss_period_size / sd < 4096)
731 sd = runtime->oss.subdivision;
732 oss_period_size /= sd;
733 if (oss_period_size < 16)
734 oss_period_size = 16;
737 min_period_size = snd_pcm_plug_client_size(substream,
738 snd_pcm_hw_param_value_min(slave_params, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, NULL));
739 if (min_period_size > 0) {
740 min_period_size *= oss_frame_size;
741 min_period_size = roundup_pow_of_two(min_period_size);
742 if (oss_period_size < min_period_size)
743 oss_period_size = min_period_size;
746 max_period_size = snd_pcm_plug_client_size(substream,
747 snd_pcm_hw_param_value_max(slave_params, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, NULL));
748 if (max_period_size > 0) {
749 max_period_size *= oss_frame_size;
750 max_period_size = rounddown_pow_of_two(max_period_size);
751 if (oss_period_size > max_period_size)
752 oss_period_size = max_period_size;
755 oss_periods = oss_buffer_size / oss_period_size;
757 if (substream->oss.setup.periods > 1)
758 oss_periods = substream->oss.setup.periods;
760 s = snd_pcm_hw_param_value_max(slave_params, SNDRV_PCM_HW_PARAM_PERIODS, NULL);
761 if (s > 0 && runtime->oss.maxfrags && s > runtime->oss.maxfrags)
762 s = runtime->oss.maxfrags;
766 s = snd_pcm_hw_param_value_min(slave_params, SNDRV_PCM_HW_PARAM_PERIODS, NULL);
772 while (oss_period_size * oss_periods > oss_buffer_size)
773 oss_period_size /= 2;
775 if (oss_period_size < 16)
778 /* don't allocate too large period; 1MB period must be enough */
779 if (oss_period_size > 1024 * 1024)
782 runtime->oss.period_bytes = oss_period_size;
783 runtime->oss.period_frames = 1;
784 runtime->oss.periods = oss_periods;
788 static int choose_rate(struct snd_pcm_substream *substream,
789 struct snd_pcm_hw_params *params, unsigned int best_rate)
791 const struct snd_interval *it;
792 struct snd_pcm_hw_params *save;
793 unsigned int rate, prev;
795 save = kmalloc(sizeof(*save), GFP_KERNEL);
799 it = hw_param_interval_c(save, SNDRV_PCM_HW_PARAM_RATE);
801 /* try multiples of the best rate */
804 if (it->max < rate || (it->max == rate && it->openmax))
806 if (it->min < rate || (it->min == rate && !it->openmin)) {
808 ret = snd_pcm_hw_param_set(substream, params,
809 SNDRV_PCM_HW_PARAM_RATE,
811 if (ret == (int)rate) {
823 /* not found, use the nearest rate */
825 return snd_pcm_hw_param_near(substream, params, SNDRV_PCM_HW_PARAM_RATE, best_rate, NULL);
828 /* parameter locking: returns immediately if tried during streaming */
829 static int lock_params(struct snd_pcm_runtime *runtime)
831 if (mutex_lock_interruptible(&runtime->oss.params_lock))
833 if (atomic_read(&runtime->oss.rw_ref)) {
834 mutex_unlock(&runtime->oss.params_lock);
840 static void unlock_params(struct snd_pcm_runtime *runtime)
842 mutex_unlock(&runtime->oss.params_lock);
845 /* call with params_lock held */
846 static int snd_pcm_oss_change_params_locked(struct snd_pcm_substream *substream)
848 struct snd_pcm_runtime *runtime = substream->runtime;
849 struct snd_pcm_hw_params *params, *sparams;
850 struct snd_pcm_sw_params *sw_params;
851 ssize_t oss_buffer_size, oss_period_size;
852 size_t oss_frame_size;
855 snd_pcm_format_t format, sformat;
857 const struct snd_mask *sformat_mask;
858 struct snd_mask mask;
860 if (!runtime->oss.params)
862 sw_params = kzalloc(sizeof(*sw_params), GFP_KERNEL);
863 params = kmalloc(sizeof(*params), GFP_KERNEL);
864 sparams = kmalloc(sizeof(*sparams), GFP_KERNEL);
865 if (!sw_params || !params || !sparams) {
870 if (atomic_read(&substream->mmap_count))
873 direct = substream->oss.setup.direct;
875 _snd_pcm_hw_params_any(sparams);
876 _snd_pcm_hw_param_setinteger(sparams, SNDRV_PCM_HW_PARAM_PERIODS);
877 _snd_pcm_hw_param_min(sparams, SNDRV_PCM_HW_PARAM_PERIODS, 2, 0);
878 snd_mask_none(&mask);
879 if (atomic_read(&substream->mmap_count))
880 snd_mask_set(&mask, (__force int)SNDRV_PCM_ACCESS_MMAP_INTERLEAVED);
882 snd_mask_set(&mask, (__force int)SNDRV_PCM_ACCESS_RW_INTERLEAVED);
884 snd_mask_set(&mask, (__force int)SNDRV_PCM_ACCESS_RW_NONINTERLEAVED);
886 err = snd_pcm_hw_param_mask(substream, sparams, SNDRV_PCM_HW_PARAM_ACCESS, &mask);
888 pcm_dbg(substream->pcm, "No usable accesses\n");
893 err = choose_rate(substream, sparams, runtime->oss.rate);
896 err = snd_pcm_hw_param_near(substream, sparams,
897 SNDRV_PCM_HW_PARAM_CHANNELS,
898 runtime->oss.channels, NULL);
902 format = snd_pcm_oss_format_from(runtime->oss.format);
904 sformat_mask = hw_param_mask_c(sparams, SNDRV_PCM_HW_PARAM_FORMAT);
908 sformat = snd_pcm_plug_slave_format(format, sformat_mask);
910 if ((__force int)sformat < 0 ||
911 !snd_mask_test_format(sformat_mask, sformat)) {
912 pcm_for_each_format(sformat) {
913 if (snd_mask_test_format(sformat_mask, sformat) &&
914 snd_pcm_oss_format_to(sformat) >= 0)
917 pcm_dbg(substream->pcm, "Cannot find a format!!!\n");
922 err = _snd_pcm_hw_param_set(sparams, SNDRV_PCM_HW_PARAM_FORMAT, (__force int)sformat, 0);
927 memcpy(params, sparams, sizeof(*params));
929 _snd_pcm_hw_params_any(params);
930 _snd_pcm_hw_param_set(params, SNDRV_PCM_HW_PARAM_ACCESS,
931 (__force int)SNDRV_PCM_ACCESS_RW_INTERLEAVED, 0);
932 _snd_pcm_hw_param_set(params, SNDRV_PCM_HW_PARAM_FORMAT,
933 (__force int)snd_pcm_oss_format_from(runtime->oss.format), 0);
934 _snd_pcm_hw_param_set(params, SNDRV_PCM_HW_PARAM_CHANNELS,
935 runtime->oss.channels, 0);
936 _snd_pcm_hw_param_set(params, SNDRV_PCM_HW_PARAM_RATE,
937 runtime->oss.rate, 0);
938 pdprintf("client: access = %i, format = %i, channels = %i, rate = %i\n",
939 params_access(params), params_format(params),
940 params_channels(params), params_rate(params));
942 pdprintf("slave: access = %i, format = %i, channels = %i, rate = %i\n",
943 params_access(sparams), params_format(sparams),
944 params_channels(sparams), params_rate(sparams));
946 oss_frame_size = snd_pcm_format_physical_width(params_format(params)) *
947 params_channels(params) / 8;
949 err = snd_pcm_oss_period_size(substream, params, sparams);
953 n = snd_pcm_plug_slave_size(substream, runtime->oss.period_bytes / oss_frame_size);
954 err = snd_pcm_hw_param_near(substream, sparams, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, n, NULL);
958 err = snd_pcm_hw_param_near(substream, sparams, SNDRV_PCM_HW_PARAM_PERIODS,
959 runtime->oss.periods, NULL);
963 snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DROP, NULL);
965 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_HW_PARAMS, sparams);
967 pcm_dbg(substream->pcm, "HW_PARAMS failed: %i\n", err);
971 #ifdef CONFIG_SND_PCM_OSS_PLUGINS
972 snd_pcm_oss_plugin_clear(substream);
974 /* add necessary plugins */
975 snd_pcm_oss_plugin_clear(substream);
976 err = snd_pcm_plug_format_plugins(substream, params, sparams);
978 pcm_dbg(substream->pcm,
979 "snd_pcm_plug_format_plugins failed: %i\n", err);
980 snd_pcm_oss_plugin_clear(substream);
983 if (runtime->oss.plugin_first) {
984 struct snd_pcm_plugin *plugin;
985 err = snd_pcm_plugin_build_io(substream, sparams, &plugin);
987 pcm_dbg(substream->pcm,
988 "snd_pcm_plugin_build_io failed: %i\n", err);
989 snd_pcm_oss_plugin_clear(substream);
992 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
993 err = snd_pcm_plugin_append(plugin);
995 err = snd_pcm_plugin_insert(plugin);
998 snd_pcm_oss_plugin_clear(substream);
1005 if (runtime->oss.trigger) {
1006 sw_params->start_threshold = 1;
1008 sw_params->start_threshold = runtime->boundary;
1010 if (atomic_read(&substream->mmap_count) ||
1011 substream->stream == SNDRV_PCM_STREAM_CAPTURE)
1012 sw_params->stop_threshold = runtime->boundary;
1014 sw_params->stop_threshold = runtime->buffer_size;
1015 sw_params->tstamp_mode = SNDRV_PCM_TSTAMP_NONE;
1016 sw_params->period_step = 1;
1017 sw_params->avail_min = substream->stream == SNDRV_PCM_STREAM_PLAYBACK ?
1018 1 : runtime->period_size;
1019 if (atomic_read(&substream->mmap_count) ||
1020 substream->oss.setup.nosilence) {
1021 sw_params->silence_threshold = 0;
1022 sw_params->silence_size = 0;
1024 snd_pcm_uframes_t frames;
1025 frames = runtime->period_size + 16;
1026 if (frames > runtime->buffer_size)
1027 frames = runtime->buffer_size;
1028 sw_params->silence_threshold = frames;
1029 sw_params->silence_size = frames;
1032 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_SW_PARAMS, sw_params);
1034 pcm_dbg(substream->pcm, "SW_PARAMS failed: %i\n", err);
1038 runtime->oss.periods = params_periods(sparams);
1039 oss_period_size = snd_pcm_plug_client_size(substream, params_period_size(sparams));
1040 if (oss_period_size < 0) {
1044 #ifdef CONFIG_SND_PCM_OSS_PLUGINS
1045 if (runtime->oss.plugin_first) {
1046 err = snd_pcm_plug_alloc(substream, oss_period_size);
1051 oss_period_size = array_size(oss_period_size, oss_frame_size);
1052 oss_buffer_size = array_size(oss_period_size, runtime->oss.periods);
1053 if (oss_buffer_size <= 0) {
1058 runtime->oss.period_bytes = oss_period_size;
1059 runtime->oss.buffer_bytes = oss_buffer_size;
1061 pdprintf("oss: period bytes = %i, buffer bytes = %i\n",
1062 runtime->oss.period_bytes,
1063 runtime->oss.buffer_bytes);
1064 pdprintf("slave: period_size = %i, buffer_size = %i\n",
1065 params_period_size(sparams),
1066 params_buffer_size(sparams));
1068 runtime->oss.format = snd_pcm_oss_format_to(params_format(params));
1069 runtime->oss.channels = params_channels(params);
1070 runtime->oss.rate = params_rate(params);
1072 kvfree(runtime->oss.buffer);
1073 runtime->oss.buffer = kvzalloc(runtime->oss.period_bytes, GFP_KERNEL);
1074 if (!runtime->oss.buffer) {
1079 runtime->oss.params = 0;
1080 runtime->oss.prepare = 1;
1081 runtime->oss.buffer_used = 0;
1082 if (runtime->dma_area)
1083 snd_pcm_format_set_silence(runtime->format, runtime->dma_area, bytes_to_samples(runtime, runtime->dma_bytes));
1085 runtime->oss.period_frames = snd_pcm_alsa_frames(substream, oss_period_size);
1095 /* this one takes the lock by itself */
1096 static int snd_pcm_oss_change_params(struct snd_pcm_substream *substream,
1099 struct snd_pcm_runtime *runtime = substream->runtime;
1103 if (!(mutex_trylock(&runtime->oss.params_lock)))
1105 } else if (mutex_lock_interruptible(&runtime->oss.params_lock))
1106 return -ERESTARTSYS;
1108 err = snd_pcm_oss_change_params_locked(substream);
1109 mutex_unlock(&runtime->oss.params_lock);
1113 static int snd_pcm_oss_get_active_substream(struct snd_pcm_oss_file *pcm_oss_file, struct snd_pcm_substream **r_substream)
1116 struct snd_pcm_substream *asubstream = NULL, *substream;
1118 for (idx = 0; idx < 2; idx++) {
1119 substream = pcm_oss_file->streams[idx];
1120 if (substream == NULL)
1122 if (asubstream == NULL)
1123 asubstream = substream;
1124 if (substream->runtime->oss.params) {
1125 err = snd_pcm_oss_change_params(substream, false);
1133 *r_substream = asubstream;
1137 /* call with params_lock held */
1138 /* NOTE: this always call PREPARE unconditionally no matter whether
1139 * runtime->oss.prepare is set or not
1141 static int snd_pcm_oss_prepare(struct snd_pcm_substream *substream)
1144 struct snd_pcm_runtime *runtime = substream->runtime;
1146 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_PREPARE, NULL);
1148 pcm_dbg(substream->pcm,
1149 "snd_pcm_oss_prepare: SNDRV_PCM_IOCTL_PREPARE failed\n");
1152 runtime->oss.prepare = 0;
1153 runtime->oss.prev_hw_ptr_period = 0;
1154 runtime->oss.period_ptr = 0;
1155 runtime->oss.buffer_used = 0;
1160 static int snd_pcm_oss_make_ready(struct snd_pcm_substream *substream)
1162 struct snd_pcm_runtime *runtime;
1165 runtime = substream->runtime;
1166 if (runtime->oss.params) {
1167 err = snd_pcm_oss_change_params(substream, false);
1171 if (runtime->oss.prepare) {
1172 if (mutex_lock_interruptible(&runtime->oss.params_lock))
1173 return -ERESTARTSYS;
1174 err = snd_pcm_oss_prepare(substream);
1175 mutex_unlock(&runtime->oss.params_lock);
1182 /* call with params_lock held */
1183 static int snd_pcm_oss_make_ready_locked(struct snd_pcm_substream *substream)
1185 struct snd_pcm_runtime *runtime;
1188 runtime = substream->runtime;
1189 if (runtime->oss.params) {
1190 err = snd_pcm_oss_change_params_locked(substream);
1194 if (runtime->oss.prepare) {
1195 err = snd_pcm_oss_prepare(substream);
1202 static int snd_pcm_oss_capture_position_fixup(struct snd_pcm_substream *substream, snd_pcm_sframes_t *delay)
1204 struct snd_pcm_runtime *runtime;
1205 snd_pcm_uframes_t frames;
1209 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DELAY, delay);
1212 runtime = substream->runtime;
1213 if (*delay <= (snd_pcm_sframes_t)runtime->buffer_size)
1215 /* in case of overrun, skip whole periods like OSS/Linux driver does */
1216 /* until avail(delay) <= buffer_size */
1217 frames = (*delay - runtime->buffer_size) + runtime->period_size - 1;
1218 frames /= runtime->period_size;
1219 frames *= runtime->period_size;
1220 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_FORWARD, &frames);
1227 snd_pcm_sframes_t snd_pcm_oss_write3(struct snd_pcm_substream *substream, const char *ptr, snd_pcm_uframes_t frames, int in_kernel)
1229 struct snd_pcm_runtime *runtime = substream->runtime;
1232 if (runtime->status->state == SNDRV_PCM_STATE_XRUN ||
1233 runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) {
1235 pcm_dbg(substream->pcm,
1236 "pcm_oss: write: recovering from %s\n",
1237 runtime->status->state == SNDRV_PCM_STATE_XRUN ?
1238 "XRUN" : "SUSPEND");
1240 ret = snd_pcm_oss_prepare(substream);
1244 mutex_unlock(&runtime->oss.params_lock);
1245 ret = __snd_pcm_lib_xfer(substream, (void *)ptr, true,
1247 mutex_lock(&runtime->oss.params_lock);
1248 if (ret != -EPIPE && ret != -ESTRPIPE)
1250 /* test, if we can't store new data, because the stream */
1251 /* has not been started */
1252 if (runtime->status->state == SNDRV_PCM_STATE_PREPARED)
1258 snd_pcm_sframes_t snd_pcm_oss_read3(struct snd_pcm_substream *substream, char *ptr, snd_pcm_uframes_t frames, int in_kernel)
1260 struct snd_pcm_runtime *runtime = substream->runtime;
1261 snd_pcm_sframes_t delay;
1264 if (runtime->status->state == SNDRV_PCM_STATE_XRUN ||
1265 runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) {
1267 pcm_dbg(substream->pcm,
1268 "pcm_oss: read: recovering from %s\n",
1269 runtime->status->state == SNDRV_PCM_STATE_XRUN ?
1270 "XRUN" : "SUSPEND");
1272 ret = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DRAIN, NULL);
1275 } else if (runtime->status->state == SNDRV_PCM_STATE_SETUP) {
1276 ret = snd_pcm_oss_prepare(substream);
1280 ret = snd_pcm_oss_capture_position_fixup(substream, &delay);
1283 mutex_unlock(&runtime->oss.params_lock);
1284 ret = __snd_pcm_lib_xfer(substream, (void *)ptr, true,
1286 mutex_lock(&runtime->oss.params_lock);
1287 if (ret == -EPIPE) {
1288 if (runtime->status->state == SNDRV_PCM_STATE_DRAINING) {
1289 ret = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DROP, NULL);
1295 if (ret != -ESTRPIPE)
1301 #ifdef CONFIG_SND_PCM_OSS_PLUGINS
1302 snd_pcm_sframes_t snd_pcm_oss_writev3(struct snd_pcm_substream *substream, void **bufs, snd_pcm_uframes_t frames)
1304 struct snd_pcm_runtime *runtime = substream->runtime;
1307 if (runtime->status->state == SNDRV_PCM_STATE_XRUN ||
1308 runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) {
1310 pcm_dbg(substream->pcm,
1311 "pcm_oss: writev: recovering from %s\n",
1312 runtime->status->state == SNDRV_PCM_STATE_XRUN ?
1313 "XRUN" : "SUSPEND");
1315 ret = snd_pcm_oss_prepare(substream);
1319 ret = snd_pcm_kernel_writev(substream, bufs, frames);
1320 if (ret != -EPIPE && ret != -ESTRPIPE)
1323 /* test, if we can't store new data, because the stream */
1324 /* has not been started */
1325 if (runtime->status->state == SNDRV_PCM_STATE_PREPARED)
1331 snd_pcm_sframes_t snd_pcm_oss_readv3(struct snd_pcm_substream *substream, void **bufs, snd_pcm_uframes_t frames)
1333 struct snd_pcm_runtime *runtime = substream->runtime;
1336 if (runtime->status->state == SNDRV_PCM_STATE_XRUN ||
1337 runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) {
1339 pcm_dbg(substream->pcm,
1340 "pcm_oss: readv: recovering from %s\n",
1341 runtime->status->state == SNDRV_PCM_STATE_XRUN ?
1342 "XRUN" : "SUSPEND");
1344 ret = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DRAIN, NULL);
1347 } else if (runtime->status->state == SNDRV_PCM_STATE_SETUP) {
1348 ret = snd_pcm_oss_prepare(substream);
1352 ret = snd_pcm_kernel_readv(substream, bufs, frames);
1353 if (ret != -EPIPE && ret != -ESTRPIPE)
1358 #endif /* CONFIG_SND_PCM_OSS_PLUGINS */
1360 static ssize_t snd_pcm_oss_write2(struct snd_pcm_substream *substream, const char *buf, size_t bytes, int in_kernel)
1362 struct snd_pcm_runtime *runtime = substream->runtime;
1363 snd_pcm_sframes_t frames, frames1;
1364 #ifdef CONFIG_SND_PCM_OSS_PLUGINS
1365 if (runtime->oss.plugin_first) {
1366 struct snd_pcm_plugin_channel *channels;
1367 size_t oss_frame_bytes = (runtime->oss.plugin_first->src_width * runtime->oss.plugin_first->src_format.channels) / 8;
1369 if (copy_from_user(runtime->oss.buffer, (const char __force __user *)buf, bytes))
1371 buf = runtime->oss.buffer;
1373 frames = bytes / oss_frame_bytes;
1374 frames1 = snd_pcm_plug_client_channels_buf(substream, (char *)buf, frames, &channels);
1377 frames1 = snd_pcm_plug_write_transfer(substream, channels, frames1);
1380 bytes = frames1 * oss_frame_bytes;
1384 frames = bytes_to_frames(runtime, bytes);
1385 frames1 = snd_pcm_oss_write3(substream, buf, frames, in_kernel);
1388 bytes = frames_to_bytes(runtime, frames1);
1393 static ssize_t snd_pcm_oss_write1(struct snd_pcm_substream *substream, const char __user *buf, size_t bytes)
1397 struct snd_pcm_runtime *runtime = substream->runtime;
1399 if (atomic_read(&substream->mmap_count))
1402 atomic_inc(&runtime->oss.rw_ref);
1404 if (mutex_lock_interruptible(&runtime->oss.params_lock)) {
1408 tmp = snd_pcm_oss_make_ready_locked(substream);
1411 if (bytes < runtime->oss.period_bytes || runtime->oss.buffer_used > 0) {
1413 if (tmp + runtime->oss.buffer_used > runtime->oss.period_bytes)
1414 tmp = runtime->oss.period_bytes - runtime->oss.buffer_used;
1416 if (copy_from_user(runtime->oss.buffer + runtime->oss.buffer_used, buf, tmp)) {
1421 runtime->oss.buffer_used += tmp;
1425 if (substream->oss.setup.partialfrag ||
1426 runtime->oss.buffer_used == runtime->oss.period_bytes) {
1427 tmp = snd_pcm_oss_write2(substream, runtime->oss.buffer + runtime->oss.period_ptr,
1428 runtime->oss.buffer_used - runtime->oss.period_ptr, 1);
1431 runtime->oss.bytes += tmp;
1432 runtime->oss.period_ptr += tmp;
1433 runtime->oss.period_ptr %= runtime->oss.period_bytes;
1434 if (runtime->oss.period_ptr == 0 ||
1435 runtime->oss.period_ptr == runtime->oss.buffer_used)
1436 runtime->oss.buffer_used = 0;
1437 else if ((substream->f_flags & O_NONBLOCK) != 0) {
1443 tmp = snd_pcm_oss_write2(substream,
1444 (const char __force *)buf,
1445 runtime->oss.period_bytes, 0);
1448 runtime->oss.bytes += tmp;
1452 if ((substream->f_flags & O_NONBLOCK) != 0 &&
1453 tmp != runtime->oss.period_bytes)
1457 mutex_unlock(&runtime->oss.params_lock);
1460 if (signal_pending(current)) {
1466 atomic_dec(&runtime->oss.rw_ref);
1467 return xfer > 0 ? (snd_pcm_sframes_t)xfer : tmp;
1470 static ssize_t snd_pcm_oss_read2(struct snd_pcm_substream *substream, char *buf, size_t bytes, int in_kernel)
1472 struct snd_pcm_runtime *runtime = substream->runtime;
1473 snd_pcm_sframes_t frames, frames1;
1474 #ifdef CONFIG_SND_PCM_OSS_PLUGINS
1475 char __user *final_dst = (char __force __user *)buf;
1476 if (runtime->oss.plugin_first) {
1477 struct snd_pcm_plugin_channel *channels;
1478 size_t oss_frame_bytes = (runtime->oss.plugin_last->dst_width * runtime->oss.plugin_last->dst_format.channels) / 8;
1480 buf = runtime->oss.buffer;
1481 frames = bytes / oss_frame_bytes;
1482 frames1 = snd_pcm_plug_client_channels_buf(substream, buf, frames, &channels);
1485 frames1 = snd_pcm_plug_read_transfer(substream, channels, frames1);
1488 bytes = frames1 * oss_frame_bytes;
1489 if (!in_kernel && copy_to_user(final_dst, buf, bytes))
1494 frames = bytes_to_frames(runtime, bytes);
1495 frames1 = snd_pcm_oss_read3(substream, buf, frames, in_kernel);
1498 bytes = frames_to_bytes(runtime, frames1);
1503 static ssize_t snd_pcm_oss_read1(struct snd_pcm_substream *substream, char __user *buf, size_t bytes)
1507 struct snd_pcm_runtime *runtime = substream->runtime;
1509 if (atomic_read(&substream->mmap_count))
1512 atomic_inc(&runtime->oss.rw_ref);
1514 if (mutex_lock_interruptible(&runtime->oss.params_lock)) {
1518 tmp = snd_pcm_oss_make_ready_locked(substream);
1521 if (bytes < runtime->oss.period_bytes || runtime->oss.buffer_used > 0) {
1522 if (runtime->oss.buffer_used == 0) {
1523 tmp = snd_pcm_oss_read2(substream, runtime->oss.buffer, runtime->oss.period_bytes, 1);
1526 runtime->oss.bytes += tmp;
1527 runtime->oss.period_ptr = tmp;
1528 runtime->oss.buffer_used = tmp;
1531 if ((size_t) tmp > runtime->oss.buffer_used)
1532 tmp = runtime->oss.buffer_used;
1533 if (copy_to_user(buf, runtime->oss.buffer + (runtime->oss.period_ptr - runtime->oss.buffer_used), tmp)) {
1540 runtime->oss.buffer_used -= tmp;
1542 tmp = snd_pcm_oss_read2(substream, (char __force *)buf,
1543 runtime->oss.period_bytes, 0);
1546 runtime->oss.bytes += tmp;
1552 mutex_unlock(&runtime->oss.params_lock);
1555 if (signal_pending(current)) {
1561 atomic_dec(&runtime->oss.rw_ref);
1562 return xfer > 0 ? (snd_pcm_sframes_t)xfer : tmp;
1565 static int snd_pcm_oss_reset(struct snd_pcm_oss_file *pcm_oss_file)
1567 struct snd_pcm_substream *substream;
1568 struct snd_pcm_runtime *runtime;
1571 for (i = 0; i < 2; i++) {
1572 substream = pcm_oss_file->streams[i];
1575 runtime = substream->runtime;
1576 snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DROP, NULL);
1577 mutex_lock(&runtime->oss.params_lock);
1578 runtime->oss.prepare = 1;
1579 runtime->oss.buffer_used = 0;
1580 runtime->oss.prev_hw_ptr_period = 0;
1581 runtime->oss.period_ptr = 0;
1582 mutex_unlock(&runtime->oss.params_lock);
1587 static int snd_pcm_oss_post(struct snd_pcm_oss_file *pcm_oss_file)
1589 struct snd_pcm_substream *substream;
1592 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
1593 if (substream != NULL) {
1594 err = snd_pcm_oss_make_ready(substream);
1597 snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_START, NULL);
1599 /* note: all errors from the start action are ignored */
1600 /* OSS apps do not know, how to handle them */
1604 static int snd_pcm_oss_sync1(struct snd_pcm_substream *substream, size_t size)
1606 struct snd_pcm_runtime *runtime;
1608 snd_pcm_state_t state;
1610 wait_queue_entry_t wait;
1612 runtime = substream->runtime;
1613 init_waitqueue_entry(&wait, current);
1614 add_wait_queue(&runtime->sleep, &wait);
1616 pcm_dbg(substream->pcm, "sync1: size = %li\n", size);
1619 result = snd_pcm_oss_write2(substream, runtime->oss.buffer, size, 1);
1621 runtime->oss.buffer_used = 0;
1625 if (result != 0 && result != -EAGAIN)
1628 set_current_state(TASK_INTERRUPTIBLE);
1629 snd_pcm_stream_lock_irq(substream);
1630 state = runtime->status->state;
1631 snd_pcm_stream_unlock_irq(substream);
1632 if (state != SNDRV_PCM_STATE_RUNNING) {
1633 set_current_state(TASK_RUNNING);
1636 res = schedule_timeout(10 * HZ);
1637 if (signal_pending(current)) {
1638 result = -ERESTARTSYS;
1642 pcm_err(substream->pcm,
1643 "OSS sync error - DMA timeout\n");
1648 remove_wait_queue(&runtime->sleep, &wait);
1652 static int snd_pcm_oss_sync(struct snd_pcm_oss_file *pcm_oss_file)
1655 unsigned int saved_f_flags;
1656 struct snd_pcm_substream *substream;
1657 struct snd_pcm_runtime *runtime;
1658 snd_pcm_format_t format;
1659 unsigned long width;
1662 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
1663 if (substream != NULL) {
1664 runtime = substream->runtime;
1665 if (atomic_read(&substream->mmap_count))
1667 atomic_inc(&runtime->oss.rw_ref);
1668 if (mutex_lock_interruptible(&runtime->oss.params_lock)) {
1669 atomic_dec(&runtime->oss.rw_ref);
1670 return -ERESTARTSYS;
1672 err = snd_pcm_oss_make_ready_locked(substream);
1675 format = snd_pcm_oss_format_from(runtime->oss.format);
1676 width = snd_pcm_format_physical_width(format);
1677 if (runtime->oss.buffer_used > 0) {
1679 pcm_dbg(substream->pcm, "sync: buffer_used\n");
1681 size = (8 * (runtime->oss.period_bytes - runtime->oss.buffer_used) + 7) / width;
1682 snd_pcm_format_set_silence(format,
1683 runtime->oss.buffer + runtime->oss.buffer_used,
1685 err = snd_pcm_oss_sync1(substream, runtime->oss.period_bytes);
1688 } else if (runtime->oss.period_ptr > 0) {
1690 pcm_dbg(substream->pcm, "sync: period_ptr\n");
1692 size = runtime->oss.period_bytes - runtime->oss.period_ptr;
1693 snd_pcm_format_set_silence(format,
1694 runtime->oss.buffer,
1696 err = snd_pcm_oss_sync1(substream, size);
1701 * The ALSA's period might be a bit large than OSS one.
1702 * Fill the remain portion of ALSA period with zeros.
1704 size = runtime->control->appl_ptr % runtime->period_size;
1706 size = runtime->period_size - size;
1707 if (runtime->access == SNDRV_PCM_ACCESS_RW_INTERLEAVED)
1708 snd_pcm_lib_write(substream, NULL, size);
1709 else if (runtime->access == SNDRV_PCM_ACCESS_RW_NONINTERLEAVED)
1710 snd_pcm_lib_writev(substream, NULL, size);
1713 mutex_unlock(&runtime->oss.params_lock);
1714 atomic_dec(&runtime->oss.rw_ref);
1718 * finish sync: drain the buffer
1721 saved_f_flags = substream->f_flags;
1722 substream->f_flags &= ~O_NONBLOCK;
1723 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DRAIN, NULL);
1724 substream->f_flags = saved_f_flags;
1727 mutex_lock(&runtime->oss.params_lock);
1728 runtime->oss.prepare = 1;
1729 mutex_unlock(&runtime->oss.params_lock);
1732 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
1733 if (substream != NULL) {
1734 err = snd_pcm_oss_make_ready(substream);
1737 runtime = substream->runtime;
1738 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DROP, NULL);
1741 mutex_lock(&runtime->oss.params_lock);
1742 runtime->oss.buffer_used = 0;
1743 runtime->oss.prepare = 1;
1744 mutex_unlock(&runtime->oss.params_lock);
1749 static int snd_pcm_oss_set_rate(struct snd_pcm_oss_file *pcm_oss_file, int rate)
1753 for (idx = 1; idx >= 0; --idx) {
1754 struct snd_pcm_substream *substream = pcm_oss_file->streams[idx];
1755 struct snd_pcm_runtime *runtime;
1758 if (substream == NULL)
1760 runtime = substream->runtime;
1763 else if (rate > 192000)
1765 err = lock_params(runtime);
1768 if (runtime->oss.rate != rate) {
1769 runtime->oss.params = 1;
1770 runtime->oss.rate = rate;
1772 unlock_params(runtime);
1774 return snd_pcm_oss_get_rate(pcm_oss_file);
1777 static int snd_pcm_oss_get_rate(struct snd_pcm_oss_file *pcm_oss_file)
1779 struct snd_pcm_substream *substream;
1782 err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream);
1785 return substream->runtime->oss.rate;
1788 static int snd_pcm_oss_set_channels(struct snd_pcm_oss_file *pcm_oss_file, unsigned int channels)
1795 for (idx = 1; idx >= 0; --idx) {
1796 struct snd_pcm_substream *substream = pcm_oss_file->streams[idx];
1797 struct snd_pcm_runtime *runtime;
1800 if (substream == NULL)
1802 runtime = substream->runtime;
1803 err = lock_params(runtime);
1806 if (runtime->oss.channels != channels) {
1807 runtime->oss.params = 1;
1808 runtime->oss.channels = channels;
1810 unlock_params(runtime);
1812 return snd_pcm_oss_get_channels(pcm_oss_file);
1815 static int snd_pcm_oss_get_channels(struct snd_pcm_oss_file *pcm_oss_file)
1817 struct snd_pcm_substream *substream;
1820 err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream);
1823 return substream->runtime->oss.channels;
1826 static int snd_pcm_oss_get_block_size(struct snd_pcm_oss_file *pcm_oss_file)
1828 struct snd_pcm_substream *substream;
1831 err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream);
1834 return substream->runtime->oss.period_bytes;
1837 static int snd_pcm_oss_get_formats(struct snd_pcm_oss_file *pcm_oss_file)
1839 struct snd_pcm_substream *substream;
1842 struct snd_pcm_hw_params *params;
1843 unsigned int formats = 0;
1844 const struct snd_mask *format_mask;
1847 err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream);
1850 if (atomic_read(&substream->mmap_count))
1853 direct = substream->oss.setup.direct;
1855 return AFMT_MU_LAW | AFMT_U8 |
1856 AFMT_S16_LE | AFMT_S16_BE |
1857 AFMT_S8 | AFMT_U16_LE |
1859 AFMT_S32_LE | AFMT_S32_BE |
1860 AFMT_S24_LE | AFMT_S24_BE |
1862 params = kmalloc(sizeof(*params), GFP_KERNEL);
1865 _snd_pcm_hw_params_any(params);
1866 err = snd_pcm_hw_refine(substream, params);
1869 format_mask = hw_param_mask_c(params, SNDRV_PCM_HW_PARAM_FORMAT);
1870 for (fmt = 0; fmt < 32; ++fmt) {
1871 if (snd_mask_test(format_mask, fmt)) {
1872 int f = snd_pcm_oss_format_to((__force snd_pcm_format_t)fmt);
1880 return err < 0 ? err : formats;
1883 static int snd_pcm_oss_set_format(struct snd_pcm_oss_file *pcm_oss_file, int format)
1888 if (format != AFMT_QUERY) {
1889 formats = snd_pcm_oss_get_formats(pcm_oss_file);
1892 if (!(formats & format))
1894 for (idx = 1; idx >= 0; --idx) {
1895 struct snd_pcm_substream *substream = pcm_oss_file->streams[idx];
1896 struct snd_pcm_runtime *runtime;
1897 if (substream == NULL)
1899 runtime = substream->runtime;
1900 err = lock_params(runtime);
1903 if (runtime->oss.format != format) {
1904 runtime->oss.params = 1;
1905 runtime->oss.format = format;
1907 unlock_params(runtime);
1910 return snd_pcm_oss_get_format(pcm_oss_file);
1913 static int snd_pcm_oss_get_format(struct snd_pcm_oss_file *pcm_oss_file)
1915 struct snd_pcm_substream *substream;
1918 err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream);
1921 return substream->runtime->oss.format;
1924 static int snd_pcm_oss_set_subdivide1(struct snd_pcm_substream *substream, int subdivide)
1926 struct snd_pcm_runtime *runtime;
1928 runtime = substream->runtime;
1929 if (subdivide == 0) {
1930 subdivide = runtime->oss.subdivision;
1935 if (runtime->oss.subdivision || runtime->oss.fragshift)
1937 if (subdivide != 1 && subdivide != 2 && subdivide != 4 &&
1938 subdivide != 8 && subdivide != 16)
1940 runtime->oss.subdivision = subdivide;
1941 runtime->oss.params = 1;
1945 static int snd_pcm_oss_set_subdivide(struct snd_pcm_oss_file *pcm_oss_file, int subdivide)
1947 int err = -EINVAL, idx;
1949 for (idx = 1; idx >= 0; --idx) {
1950 struct snd_pcm_substream *substream = pcm_oss_file->streams[idx];
1951 struct snd_pcm_runtime *runtime;
1953 if (substream == NULL)
1955 runtime = substream->runtime;
1956 err = lock_params(runtime);
1959 err = snd_pcm_oss_set_subdivide1(substream, subdivide);
1960 unlock_params(runtime);
1967 static int snd_pcm_oss_set_fragment1(struct snd_pcm_substream *substream, unsigned int val)
1969 struct snd_pcm_runtime *runtime;
1972 runtime = substream->runtime;
1973 if (runtime->oss.subdivision || runtime->oss.fragshift)
1975 fragshift = val & 0xffff;
1976 if (fragshift >= 25) /* should be large enough */
1978 runtime->oss.fragshift = fragshift;
1979 runtime->oss.maxfrags = (val >> 16) & 0xffff;
1980 if (runtime->oss.fragshift < 4) /* < 16 */
1981 runtime->oss.fragshift = 4;
1982 if (runtime->oss.maxfrags < 2)
1983 runtime->oss.maxfrags = 2;
1984 runtime->oss.params = 1;
1988 static int snd_pcm_oss_set_fragment(struct snd_pcm_oss_file *pcm_oss_file, unsigned int val)
1990 int err = -EINVAL, idx;
1992 for (idx = 1; idx >= 0; --idx) {
1993 struct snd_pcm_substream *substream = pcm_oss_file->streams[idx];
1994 struct snd_pcm_runtime *runtime;
1996 if (substream == NULL)
1998 runtime = substream->runtime;
1999 err = lock_params(runtime);
2002 err = snd_pcm_oss_set_fragment1(substream, val);
2003 unlock_params(runtime);
2010 static int snd_pcm_oss_nonblock(struct file * file)
2012 spin_lock(&file->f_lock);
2013 file->f_flags |= O_NONBLOCK;
2014 spin_unlock(&file->f_lock);
2018 static int snd_pcm_oss_get_caps1(struct snd_pcm_substream *substream, int res)
2021 if (substream == NULL) {
2022 res &= ~DSP_CAP_DUPLEX;
2025 #ifdef DSP_CAP_MULTI
2026 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
2027 if (substream->pstr->substream_count > 1)
2028 res |= DSP_CAP_MULTI;
2030 /* DSP_CAP_REALTIME is set all times: */
2031 /* all ALSA drivers can return actual pointer in ring buffer */
2032 #if defined(DSP_CAP_REALTIME) && 0
2034 struct snd_pcm_runtime *runtime = substream->runtime;
2035 if (runtime->info & (SNDRV_PCM_INFO_BLOCK_TRANSFER|SNDRV_PCM_INFO_BATCH))
2036 res &= ~DSP_CAP_REALTIME;
2042 static int snd_pcm_oss_get_caps(struct snd_pcm_oss_file *pcm_oss_file)
2046 result = DSP_CAP_TRIGGER | DSP_CAP_MMAP | DSP_CAP_DUPLEX | DSP_CAP_REALTIME;
2047 for (idx = 0; idx < 2; idx++) {
2048 struct snd_pcm_substream *substream = pcm_oss_file->streams[idx];
2049 result = snd_pcm_oss_get_caps1(substream, result);
2051 result |= 0x0001; /* revision - same as SB AWE 64 */
2055 static void snd_pcm_oss_simulate_fill(struct snd_pcm_substream *substream,
2056 snd_pcm_uframes_t hw_ptr)
2058 struct snd_pcm_runtime *runtime = substream->runtime;
2059 snd_pcm_uframes_t appl_ptr;
2060 appl_ptr = hw_ptr + runtime->buffer_size;
2061 appl_ptr %= runtime->boundary;
2062 runtime->control->appl_ptr = appl_ptr;
2065 static int snd_pcm_oss_set_trigger(struct snd_pcm_oss_file *pcm_oss_file, int trigger)
2067 struct snd_pcm_runtime *runtime;
2068 struct snd_pcm_substream *psubstream = NULL, *csubstream = NULL;
2072 pr_debug("pcm_oss: trigger = 0x%x\n", trigger);
2075 psubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
2076 csubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
2079 err = snd_pcm_oss_make_ready(psubstream);
2084 err = snd_pcm_oss_make_ready(csubstream);
2089 runtime = psubstream->runtime;
2091 if (mutex_lock_interruptible(&runtime->oss.params_lock))
2092 return -ERESTARTSYS;
2093 if (trigger & PCM_ENABLE_OUTPUT) {
2094 if (runtime->oss.trigger)
2096 if (atomic_read(&psubstream->mmap_count))
2097 snd_pcm_oss_simulate_fill(psubstream,
2098 get_hw_ptr_period(runtime));
2099 runtime->oss.trigger = 1;
2100 runtime->start_threshold = 1;
2101 cmd = SNDRV_PCM_IOCTL_START;
2103 if (!runtime->oss.trigger)
2105 runtime->oss.trigger = 0;
2106 runtime->start_threshold = runtime->boundary;
2107 cmd = SNDRV_PCM_IOCTL_DROP;
2108 runtime->oss.prepare = 1;
2111 mutex_unlock(&runtime->oss.params_lock);
2113 err = snd_pcm_kernel_ioctl(psubstream, cmd, NULL);
2119 runtime = csubstream->runtime;
2121 if (mutex_lock_interruptible(&runtime->oss.params_lock))
2122 return -ERESTARTSYS;
2123 if (trigger & PCM_ENABLE_INPUT) {
2124 if (runtime->oss.trigger)
2126 runtime->oss.trigger = 1;
2127 runtime->start_threshold = 1;
2128 cmd = SNDRV_PCM_IOCTL_START;
2130 if (!runtime->oss.trigger)
2132 runtime->oss.trigger = 0;
2133 runtime->start_threshold = runtime->boundary;
2134 cmd = SNDRV_PCM_IOCTL_DROP;
2135 runtime->oss.prepare = 1;
2138 mutex_unlock(&runtime->oss.params_lock);
2140 err = snd_pcm_kernel_ioctl(csubstream, cmd, NULL);
2148 static int snd_pcm_oss_get_trigger(struct snd_pcm_oss_file *pcm_oss_file)
2150 struct snd_pcm_substream *psubstream = NULL, *csubstream = NULL;
2153 psubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
2154 csubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
2155 if (psubstream && psubstream->runtime && psubstream->runtime->oss.trigger)
2156 result |= PCM_ENABLE_OUTPUT;
2157 if (csubstream && csubstream->runtime && csubstream->runtime->oss.trigger)
2158 result |= PCM_ENABLE_INPUT;
2162 static int snd_pcm_oss_get_odelay(struct snd_pcm_oss_file *pcm_oss_file)
2164 struct snd_pcm_substream *substream;
2165 struct snd_pcm_runtime *runtime;
2166 snd_pcm_sframes_t delay;
2169 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
2170 if (substream == NULL)
2172 err = snd_pcm_oss_make_ready(substream);
2175 runtime = substream->runtime;
2176 if (runtime->oss.params || runtime->oss.prepare)
2178 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DELAY, &delay);
2180 delay = 0; /* hack for broken OSS applications */
2183 return snd_pcm_oss_bytes(substream, delay);
2186 static int snd_pcm_oss_get_ptr(struct snd_pcm_oss_file *pcm_oss_file, int stream, struct count_info __user * _info)
2188 struct snd_pcm_substream *substream;
2189 struct snd_pcm_runtime *runtime;
2190 snd_pcm_sframes_t delay;
2192 struct count_info info;
2197 substream = pcm_oss_file->streams[stream];
2198 if (substream == NULL)
2200 err = snd_pcm_oss_make_ready(substream);
2203 runtime = substream->runtime;
2204 if (runtime->oss.params || runtime->oss.prepare) {
2205 memset(&info, 0, sizeof(info));
2206 if (copy_to_user(_info, &info, sizeof(info)))
2210 if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
2211 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DELAY, &delay);
2212 if (err == -EPIPE || err == -ESTRPIPE || (! err && delay < 0)) {
2217 fixup = runtime->oss.buffer_used;
2220 err = snd_pcm_oss_capture_position_fixup(substream, &delay);
2221 fixup = -runtime->oss.buffer_used;
2225 info.ptr = snd_pcm_oss_bytes(substream, runtime->status->hw_ptr % runtime->buffer_size);
2226 if (atomic_read(&substream->mmap_count)) {
2227 snd_pcm_sframes_t n;
2228 delay = get_hw_ptr_period(runtime);
2229 n = delay - runtime->oss.prev_hw_ptr_period;
2231 n += runtime->boundary;
2232 info.blocks = n / runtime->period_size;
2233 runtime->oss.prev_hw_ptr_period = delay;
2234 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
2235 snd_pcm_oss_simulate_fill(substream, delay);
2236 info.bytes = snd_pcm_oss_bytes(substream, runtime->status->hw_ptr) & INT_MAX;
2238 delay = snd_pcm_oss_bytes(substream, delay);
2239 if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
2240 if (substream->oss.setup.buggyptr)
2241 info.blocks = (runtime->oss.buffer_bytes - delay - fixup) / runtime->oss.period_bytes;
2243 info.blocks = (delay + fixup) / runtime->oss.period_bytes;
2244 info.bytes = (runtime->oss.bytes - delay) & INT_MAX;
2247 info.blocks = delay / runtime->oss.period_bytes;
2248 info.bytes = (runtime->oss.bytes + delay) & INT_MAX;
2251 if (copy_to_user(_info, &info, sizeof(info)))
2256 static int snd_pcm_oss_get_space(struct snd_pcm_oss_file *pcm_oss_file, int stream, struct audio_buf_info __user *_info)
2258 struct snd_pcm_substream *substream;
2259 struct snd_pcm_runtime *runtime;
2260 snd_pcm_sframes_t avail;
2262 struct audio_buf_info info;
2267 substream = pcm_oss_file->streams[stream];
2268 if (substream == NULL)
2270 runtime = substream->runtime;
2272 if (runtime->oss.params) {
2273 err = snd_pcm_oss_change_params(substream, false);
2278 info.fragsize = runtime->oss.period_bytes;
2279 info.fragstotal = runtime->periods;
2280 if (runtime->oss.prepare) {
2281 if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
2282 info.bytes = runtime->oss.period_bytes * runtime->oss.periods;
2283 info.fragments = runtime->oss.periods;
2289 if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
2290 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DELAY, &avail);
2291 if (err == -EPIPE || err == -ESTRPIPE || (! err && avail < 0)) {
2292 avail = runtime->buffer_size;
2296 avail = runtime->buffer_size - avail;
2297 fixup = -runtime->oss.buffer_used;
2300 err = snd_pcm_oss_capture_position_fixup(substream, &avail);
2301 fixup = runtime->oss.buffer_used;
2305 info.bytes = snd_pcm_oss_bytes(substream, avail) + fixup;
2306 info.fragments = info.bytes / runtime->oss.period_bytes;
2310 pcm_dbg(substream->pcm,
2311 "pcm_oss: space: bytes = %i, fragments = %i, fragstotal = %i, fragsize = %i\n",
2312 info.bytes, info.fragments, info.fragstotal, info.fragsize);
2314 if (copy_to_user(_info, &info, sizeof(info)))
2319 static int snd_pcm_oss_get_mapbuf(struct snd_pcm_oss_file *pcm_oss_file, int stream, struct buffmem_desc __user * _info)
2321 // it won't be probably implemented
2322 // pr_debug("TODO: snd_pcm_oss_get_mapbuf\n");
2326 static const char *strip_task_path(const char *path)
2328 const char *ptr, *ptrl = NULL;
2329 for (ptr = path; *ptr; ptr++) {
2336 static void snd_pcm_oss_look_for_setup(struct snd_pcm *pcm, int stream,
2337 const char *task_name,
2338 struct snd_pcm_oss_setup *rsetup)
2340 struct snd_pcm_oss_setup *setup;
2342 mutex_lock(&pcm->streams[stream].oss.setup_mutex);
2344 for (setup = pcm->streams[stream].oss.setup_list; setup;
2345 setup = setup->next) {
2346 if (!strcmp(setup->task_name, task_name))
2349 } while ((task_name = strip_task_path(task_name)) != NULL);
2353 mutex_unlock(&pcm->streams[stream].oss.setup_mutex);
2356 static void snd_pcm_oss_release_substream(struct snd_pcm_substream *substream)
2358 struct snd_pcm_runtime *runtime;
2359 runtime = substream->runtime;
2360 kvfree(runtime->oss.buffer);
2361 runtime->oss.buffer = NULL;
2362 #ifdef CONFIG_SND_PCM_OSS_PLUGINS
2363 snd_pcm_oss_plugin_clear(substream);
2365 substream->oss.oss = 0;
2368 static void snd_pcm_oss_init_substream(struct snd_pcm_substream *substream,
2369 struct snd_pcm_oss_setup *setup,
2372 struct snd_pcm_runtime *runtime;
2374 substream->oss.oss = 1;
2375 substream->oss.setup = *setup;
2376 if (setup->nonblock)
2377 substream->f_flags |= O_NONBLOCK;
2378 else if (setup->block)
2379 substream->f_flags &= ~O_NONBLOCK;
2380 runtime = substream->runtime;
2381 runtime->oss.params = 1;
2382 runtime->oss.trigger = 1;
2383 runtime->oss.rate = 8000;
2384 mutex_init(&runtime->oss.params_lock);
2385 switch (SNDRV_MINOR_OSS_DEVICE(minor)) {
2386 case SNDRV_MINOR_OSS_PCM_8:
2387 runtime->oss.format = AFMT_U8;
2389 case SNDRV_MINOR_OSS_PCM_16:
2390 runtime->oss.format = AFMT_S16_LE;
2393 runtime->oss.format = AFMT_MU_LAW;
2395 runtime->oss.channels = 1;
2396 runtime->oss.fragshift = 0;
2397 runtime->oss.maxfrags = 0;
2398 runtime->oss.subdivision = 0;
2399 substream->pcm_release = snd_pcm_oss_release_substream;
2400 atomic_set(&runtime->oss.rw_ref, 0);
2403 static int snd_pcm_oss_release_file(struct snd_pcm_oss_file *pcm_oss_file)
2408 for (cidx = 0; cidx < 2; ++cidx) {
2409 struct snd_pcm_substream *substream = pcm_oss_file->streams[cidx];
2411 snd_pcm_release_substream(substream);
2413 kfree(pcm_oss_file);
2417 static int snd_pcm_oss_open_file(struct file *file,
2418 struct snd_pcm *pcm,
2419 struct snd_pcm_oss_file **rpcm_oss_file,
2421 struct snd_pcm_oss_setup *setup)
2424 struct snd_pcm_oss_file *pcm_oss_file;
2425 struct snd_pcm_substream *substream;
2426 fmode_t f_mode = file->f_mode;
2429 *rpcm_oss_file = NULL;
2431 pcm_oss_file = kzalloc(sizeof(*pcm_oss_file), GFP_KERNEL);
2432 if (pcm_oss_file == NULL)
2435 if ((f_mode & (FMODE_WRITE|FMODE_READ)) == (FMODE_WRITE|FMODE_READ) &&
2436 (pcm->info_flags & SNDRV_PCM_INFO_HALF_DUPLEX))
2437 f_mode = FMODE_WRITE;
2439 file->f_flags &= ~O_APPEND;
2440 for (idx = 0; idx < 2; idx++) {
2441 if (setup[idx].disable)
2443 if (! pcm->streams[idx].substream_count)
2444 continue; /* no matching substream */
2445 if (idx == SNDRV_PCM_STREAM_PLAYBACK) {
2446 if (! (f_mode & FMODE_WRITE))
2449 if (! (f_mode & FMODE_READ))
2452 err = snd_pcm_open_substream(pcm, idx, file, &substream);
2454 snd_pcm_oss_release_file(pcm_oss_file);
2458 pcm_oss_file->streams[idx] = substream;
2459 snd_pcm_oss_init_substream(substream, &setup[idx], minor);
2462 if (!pcm_oss_file->streams[0] && !pcm_oss_file->streams[1]) {
2463 snd_pcm_oss_release_file(pcm_oss_file);
2467 file->private_data = pcm_oss_file;
2469 *rpcm_oss_file = pcm_oss_file;
2474 static int snd_task_name(struct task_struct *task, char *name, size_t size)
2478 if (snd_BUG_ON(!task || !name || size < 2))
2480 for (idx = 0; idx < sizeof(task->comm) && idx + 1 < size; idx++)
2481 name[idx] = task->comm[idx];
2486 static int snd_pcm_oss_open(struct inode *inode, struct file *file)
2490 struct snd_pcm *pcm;
2491 struct snd_pcm_oss_file *pcm_oss_file;
2492 struct snd_pcm_oss_setup setup[2];
2494 wait_queue_entry_t wait;
2496 err = nonseekable_open(inode, file);
2500 pcm = snd_lookup_oss_minor_data(iminor(inode),
2501 SNDRV_OSS_DEVICE_TYPE_PCM);
2506 err = snd_card_file_add(pcm->card, file);
2509 if (!try_module_get(pcm->card->module)) {
2513 if (snd_task_name(current, task_name, sizeof(task_name)) < 0) {
2517 memset(setup, 0, sizeof(setup));
2518 if (file->f_mode & FMODE_WRITE)
2519 snd_pcm_oss_look_for_setup(pcm, SNDRV_PCM_STREAM_PLAYBACK,
2520 task_name, &setup[0]);
2521 if (file->f_mode & FMODE_READ)
2522 snd_pcm_oss_look_for_setup(pcm, SNDRV_PCM_STREAM_CAPTURE,
2523 task_name, &setup[1]);
2525 nonblock = !!(file->f_flags & O_NONBLOCK);
2527 nonblock = nonblock_open;
2529 init_waitqueue_entry(&wait, current);
2530 add_wait_queue(&pcm->open_wait, &wait);
2531 mutex_lock(&pcm->open_mutex);
2533 err = snd_pcm_oss_open_file(file, pcm, &pcm_oss_file,
2534 iminor(inode), setup);
2537 if (err == -EAGAIN) {
2544 set_current_state(TASK_INTERRUPTIBLE);
2545 mutex_unlock(&pcm->open_mutex);
2547 mutex_lock(&pcm->open_mutex);
2548 if (pcm->card->shutdown) {
2552 if (signal_pending(current)) {
2557 remove_wait_queue(&pcm->open_wait, &wait);
2558 mutex_unlock(&pcm->open_mutex);
2561 snd_card_unref(pcm->card);
2565 module_put(pcm->card->module);
2567 snd_card_file_remove(pcm->card, file);
2570 snd_card_unref(pcm->card);
2574 static int snd_pcm_oss_release(struct inode *inode, struct file *file)
2576 struct snd_pcm *pcm;
2577 struct snd_pcm_substream *substream;
2578 struct snd_pcm_oss_file *pcm_oss_file;
2580 pcm_oss_file = file->private_data;
2581 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
2582 if (substream == NULL)
2583 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
2584 if (snd_BUG_ON(!substream))
2586 pcm = substream->pcm;
2587 if (!pcm->card->shutdown)
2588 snd_pcm_oss_sync(pcm_oss_file);
2589 mutex_lock(&pcm->open_mutex);
2590 snd_pcm_oss_release_file(pcm_oss_file);
2591 mutex_unlock(&pcm->open_mutex);
2592 wake_up(&pcm->open_wait);
2593 module_put(pcm->card->module);
2594 snd_card_file_remove(pcm->card, file);
2598 static long snd_pcm_oss_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
2600 struct snd_pcm_oss_file *pcm_oss_file;
2601 int __user *p = (int __user *)arg;
2604 pcm_oss_file = file->private_data;
2605 if (cmd == OSS_GETVERSION)
2606 return put_user(SNDRV_OSS_VERSION, p);
2607 if (cmd == OSS_ALSAEMULVER)
2608 return put_user(1, p);
2609 #if IS_REACHABLE(CONFIG_SND_MIXER_OSS)
2610 if (((cmd >> 8) & 0xff) == 'M') { /* mixer ioctl - for OSS compatibility */
2611 struct snd_pcm_substream *substream;
2613 for (idx = 0; idx < 2; ++idx) {
2614 substream = pcm_oss_file->streams[idx];
2615 if (substream != NULL)
2618 if (snd_BUG_ON(idx >= 2))
2620 return snd_mixer_oss_ioctl_card(substream->pcm->card, cmd, arg);
2623 if (((cmd >> 8) & 0xff) != 'P')
2626 pr_debug("pcm_oss: ioctl = 0x%x\n", cmd);
2629 case SNDCTL_DSP_RESET:
2630 return snd_pcm_oss_reset(pcm_oss_file);
2631 case SNDCTL_DSP_SYNC:
2632 return snd_pcm_oss_sync(pcm_oss_file);
2633 case SNDCTL_DSP_SPEED:
2634 if (get_user(res, p))
2636 res = snd_pcm_oss_set_rate(pcm_oss_file, res);
2639 return put_user(res, p);
2640 case SOUND_PCM_READ_RATE:
2641 res = snd_pcm_oss_get_rate(pcm_oss_file);
2644 return put_user(res, p);
2645 case SNDCTL_DSP_STEREO:
2646 if (get_user(res, p))
2648 res = res > 0 ? 2 : 1;
2649 res = snd_pcm_oss_set_channels(pcm_oss_file, res);
2652 return put_user(--res, p);
2653 case SNDCTL_DSP_GETBLKSIZE:
2654 res = snd_pcm_oss_get_block_size(pcm_oss_file);
2657 return put_user(res, p);
2658 case SNDCTL_DSP_SETFMT:
2659 if (get_user(res, p))
2661 res = snd_pcm_oss_set_format(pcm_oss_file, res);
2664 return put_user(res, p);
2665 case SOUND_PCM_READ_BITS:
2666 res = snd_pcm_oss_get_format(pcm_oss_file);
2669 return put_user(res, p);
2670 case SNDCTL_DSP_CHANNELS:
2671 if (get_user(res, p))
2673 res = snd_pcm_oss_set_channels(pcm_oss_file, res);
2676 return put_user(res, p);
2677 case SOUND_PCM_READ_CHANNELS:
2678 res = snd_pcm_oss_get_channels(pcm_oss_file);
2681 return put_user(res, p);
2682 case SOUND_PCM_WRITE_FILTER:
2683 case SOUND_PCM_READ_FILTER:
2685 case SNDCTL_DSP_POST:
2686 return snd_pcm_oss_post(pcm_oss_file);
2687 case SNDCTL_DSP_SUBDIVIDE:
2688 if (get_user(res, p))
2690 res = snd_pcm_oss_set_subdivide(pcm_oss_file, res);
2693 return put_user(res, p);
2694 case SNDCTL_DSP_SETFRAGMENT:
2695 if (get_user(res, p))
2697 return snd_pcm_oss_set_fragment(pcm_oss_file, res);
2698 case SNDCTL_DSP_GETFMTS:
2699 res = snd_pcm_oss_get_formats(pcm_oss_file);
2702 return put_user(res, p);
2703 case SNDCTL_DSP_GETOSPACE:
2704 case SNDCTL_DSP_GETISPACE:
2705 return snd_pcm_oss_get_space(pcm_oss_file,
2706 cmd == SNDCTL_DSP_GETISPACE ?
2707 SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK,
2708 (struct audio_buf_info __user *) arg);
2709 case SNDCTL_DSP_NONBLOCK:
2710 return snd_pcm_oss_nonblock(file);
2711 case SNDCTL_DSP_GETCAPS:
2712 res = snd_pcm_oss_get_caps(pcm_oss_file);
2715 return put_user(res, p);
2716 case SNDCTL_DSP_GETTRIGGER:
2717 res = snd_pcm_oss_get_trigger(pcm_oss_file);
2720 return put_user(res, p);
2721 case SNDCTL_DSP_SETTRIGGER:
2722 if (get_user(res, p))
2724 return snd_pcm_oss_set_trigger(pcm_oss_file, res);
2725 case SNDCTL_DSP_GETIPTR:
2726 case SNDCTL_DSP_GETOPTR:
2727 return snd_pcm_oss_get_ptr(pcm_oss_file,
2728 cmd == SNDCTL_DSP_GETIPTR ?
2729 SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK,
2730 (struct count_info __user *) arg);
2731 case SNDCTL_DSP_MAPINBUF:
2732 case SNDCTL_DSP_MAPOUTBUF:
2733 return snd_pcm_oss_get_mapbuf(pcm_oss_file,
2734 cmd == SNDCTL_DSP_MAPINBUF ?
2735 SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK,
2736 (struct buffmem_desc __user *) arg);
2737 case SNDCTL_DSP_SETSYNCRO:
2738 /* stop DMA now.. */
2740 case SNDCTL_DSP_SETDUPLEX:
2741 if (snd_pcm_oss_get_caps(pcm_oss_file) & DSP_CAP_DUPLEX)
2744 case SNDCTL_DSP_GETODELAY:
2745 res = snd_pcm_oss_get_odelay(pcm_oss_file);
2747 /* it's for sure, some broken apps don't check for error codes */
2751 return put_user(res, p);
2752 case SNDCTL_DSP_PROFILE:
2753 return 0; /* silently ignore */
2755 pr_debug("pcm_oss: unknown command = 0x%x\n", cmd);
2760 #ifdef CONFIG_COMPAT
2761 /* all compatible */
2762 static long snd_pcm_oss_ioctl_compat(struct file *file, unsigned int cmd,
2766 * Everything is compatbile except SNDCTL_DSP_MAPINBUF/SNDCTL_DSP_MAPOUTBUF,
2767 * which are not implemented for the native case either
2769 return snd_pcm_oss_ioctl(file, cmd, (unsigned long)compat_ptr(arg));
2772 #define snd_pcm_oss_ioctl_compat NULL
2775 static ssize_t snd_pcm_oss_read(struct file *file, char __user *buf, size_t count, loff_t *offset)
2777 struct snd_pcm_oss_file *pcm_oss_file;
2778 struct snd_pcm_substream *substream;
2780 pcm_oss_file = file->private_data;
2781 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
2782 if (substream == NULL)
2784 substream->f_flags = file->f_flags & O_NONBLOCK;
2786 return snd_pcm_oss_read1(substream, buf, count);
2789 ssize_t res = snd_pcm_oss_read1(substream, buf, count);
2790 pcm_dbg(substream->pcm,
2791 "pcm_oss: read %li bytes (returned %li bytes)\n",
2792 (long)count, (long)res);
2798 static ssize_t snd_pcm_oss_write(struct file *file, const char __user *buf, size_t count, loff_t *offset)
2800 struct snd_pcm_oss_file *pcm_oss_file;
2801 struct snd_pcm_substream *substream;
2804 pcm_oss_file = file->private_data;
2805 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
2806 if (substream == NULL)
2808 substream->f_flags = file->f_flags & O_NONBLOCK;
2809 result = snd_pcm_oss_write1(substream, buf, count);
2811 pcm_dbg(substream->pcm, "pcm_oss: write %li bytes (wrote %li bytes)\n",
2812 (long)count, (long)result);
2817 static int snd_pcm_oss_playback_ready(struct snd_pcm_substream *substream)
2819 struct snd_pcm_runtime *runtime = substream->runtime;
2820 if (atomic_read(&substream->mmap_count))
2821 return runtime->oss.prev_hw_ptr_period !=
2822 get_hw_ptr_period(runtime);
2824 return snd_pcm_playback_avail(runtime) >=
2825 runtime->oss.period_frames;
2828 static int snd_pcm_oss_capture_ready(struct snd_pcm_substream *substream)
2830 struct snd_pcm_runtime *runtime = substream->runtime;
2831 if (atomic_read(&substream->mmap_count))
2832 return runtime->oss.prev_hw_ptr_period !=
2833 get_hw_ptr_period(runtime);
2835 return snd_pcm_capture_avail(runtime) >=
2836 runtime->oss.period_frames;
2839 static __poll_t snd_pcm_oss_poll(struct file *file, poll_table * wait)
2841 struct snd_pcm_oss_file *pcm_oss_file;
2843 struct snd_pcm_substream *psubstream = NULL, *csubstream = NULL;
2845 pcm_oss_file = file->private_data;
2847 psubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
2848 csubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
2851 if (psubstream != NULL) {
2852 struct snd_pcm_runtime *runtime = psubstream->runtime;
2853 poll_wait(file, &runtime->sleep, wait);
2854 snd_pcm_stream_lock_irq(psubstream);
2855 if (runtime->status->state != SNDRV_PCM_STATE_DRAINING &&
2856 (runtime->status->state != SNDRV_PCM_STATE_RUNNING ||
2857 snd_pcm_oss_playback_ready(psubstream)))
2858 mask |= EPOLLOUT | EPOLLWRNORM;
2859 snd_pcm_stream_unlock_irq(psubstream);
2861 if (csubstream != NULL) {
2862 struct snd_pcm_runtime *runtime = csubstream->runtime;
2863 snd_pcm_state_t ostate;
2864 poll_wait(file, &runtime->sleep, wait);
2865 snd_pcm_stream_lock_irq(csubstream);
2866 ostate = runtime->status->state;
2867 if (ostate != SNDRV_PCM_STATE_RUNNING ||
2868 snd_pcm_oss_capture_ready(csubstream))
2869 mask |= EPOLLIN | EPOLLRDNORM;
2870 snd_pcm_stream_unlock_irq(csubstream);
2871 if (ostate != SNDRV_PCM_STATE_RUNNING && runtime->oss.trigger) {
2872 struct snd_pcm_oss_file ofile;
2873 memset(&ofile, 0, sizeof(ofile));
2874 ofile.streams[SNDRV_PCM_STREAM_CAPTURE] = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
2875 runtime->oss.trigger = 0;
2876 snd_pcm_oss_set_trigger(&ofile, PCM_ENABLE_INPUT);
2883 static int snd_pcm_oss_mmap(struct file *file, struct vm_area_struct *area)
2885 struct snd_pcm_oss_file *pcm_oss_file;
2886 struct snd_pcm_substream *substream = NULL;
2887 struct snd_pcm_runtime *runtime;
2891 pr_debug("pcm_oss: mmap begin\n");
2893 pcm_oss_file = file->private_data;
2894 switch ((area->vm_flags & (VM_READ | VM_WRITE))) {
2895 case VM_READ | VM_WRITE:
2896 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
2901 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
2904 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
2909 /* set VM_READ access as well to fix memset() routines that do
2910 reads before writes (to improve performance) */
2911 area->vm_flags |= VM_READ;
2912 if (substream == NULL)
2914 runtime = substream->runtime;
2915 if (!(runtime->info & SNDRV_PCM_INFO_MMAP_VALID))
2917 if (runtime->info & SNDRV_PCM_INFO_INTERLEAVED)
2918 runtime->access = SNDRV_PCM_ACCESS_MMAP_INTERLEAVED;
2922 if (runtime->oss.params) {
2923 /* use mutex_trylock() for params_lock for avoiding a deadlock
2924 * between mmap_lock and params_lock taken by
2925 * copy_from/to_user() in snd_pcm_oss_write/read()
2927 err = snd_pcm_oss_change_params(substream, true);
2931 #ifdef CONFIG_SND_PCM_OSS_PLUGINS
2932 if (runtime->oss.plugin_first != NULL)
2936 if (area->vm_pgoff != 0)
2939 err = snd_pcm_mmap_data(substream, file, area);
2942 runtime->oss.mmap_bytes = area->vm_end - area->vm_start;
2943 runtime->silence_threshold = 0;
2944 runtime->silence_size = 0;
2946 pr_debug("pcm_oss: mmap ok, bytes = 0x%x\n",
2947 runtime->oss.mmap_bytes);
2949 /* In mmap mode we never stop */
2950 runtime->stop_threshold = runtime->boundary;
2955 #ifdef CONFIG_SND_VERBOSE_PROCFS
2960 static void snd_pcm_oss_proc_read(struct snd_info_entry *entry,
2961 struct snd_info_buffer *buffer)
2963 struct snd_pcm_str *pstr = entry->private_data;
2964 struct snd_pcm_oss_setup *setup = pstr->oss.setup_list;
2965 mutex_lock(&pstr->oss.setup_mutex);
2967 snd_iprintf(buffer, "%s %u %u%s%s%s%s%s%s\n",
2971 setup->disable ? " disable" : "",
2972 setup->direct ? " direct" : "",
2973 setup->block ? " block" : "",
2974 setup->nonblock ? " non-block" : "",
2975 setup->partialfrag ? " partial-frag" : "",
2976 setup->nosilence ? " no-silence" : "");
2977 setup = setup->next;
2979 mutex_unlock(&pstr->oss.setup_mutex);
2982 static void snd_pcm_oss_proc_free_setup_list(struct snd_pcm_str * pstr)
2984 struct snd_pcm_oss_setup *setup, *setupn;
2986 for (setup = pstr->oss.setup_list, pstr->oss.setup_list = NULL;
2987 setup; setup = setupn) {
2988 setupn = setup->next;
2989 kfree(setup->task_name);
2992 pstr->oss.setup_list = NULL;
2995 static void snd_pcm_oss_proc_write(struct snd_info_entry *entry,
2996 struct snd_info_buffer *buffer)
2998 struct snd_pcm_str *pstr = entry->private_data;
2999 char line[128], str[32], task_name[32];
3002 struct snd_pcm_oss_setup *setup, *setup1, template;
3004 while (!snd_info_get_line(buffer, line, sizeof(line))) {
3005 mutex_lock(&pstr->oss.setup_mutex);
3006 memset(&template, 0, sizeof(template));
3007 ptr = snd_info_get_str(task_name, line, sizeof(task_name));
3008 if (!strcmp(task_name, "clear") || !strcmp(task_name, "erase")) {
3009 snd_pcm_oss_proc_free_setup_list(pstr);
3010 mutex_unlock(&pstr->oss.setup_mutex);
3013 for (setup = pstr->oss.setup_list; setup; setup = setup->next) {
3014 if (!strcmp(setup->task_name, task_name)) {
3019 ptr = snd_info_get_str(str, ptr, sizeof(str));
3020 template.periods = simple_strtoul(str, NULL, 10);
3021 ptr = snd_info_get_str(str, ptr, sizeof(str));
3022 template.period_size = simple_strtoul(str, NULL, 10);
3023 for (idx1 = 31; idx1 >= 0; idx1--)
3024 if (template.period_size & (1 << idx1))
3026 for (idx1--; idx1 >= 0; idx1--)
3027 template.period_size &= ~(1 << idx1);
3029 ptr = snd_info_get_str(str, ptr, sizeof(str));
3030 if (!strcmp(str, "disable")) {
3031 template.disable = 1;
3032 } else if (!strcmp(str, "direct")) {
3033 template.direct = 1;
3034 } else if (!strcmp(str, "block")) {
3036 } else if (!strcmp(str, "non-block")) {
3037 template.nonblock = 1;
3038 } else if (!strcmp(str, "partial-frag")) {
3039 template.partialfrag = 1;
3040 } else if (!strcmp(str, "no-silence")) {
3041 template.nosilence = 1;
3042 } else if (!strcmp(str, "buggy-ptr")) {
3043 template.buggyptr = 1;
3046 if (setup == NULL) {
3047 setup = kmalloc(sizeof(*setup), GFP_KERNEL);
3049 buffer->error = -ENOMEM;
3050 mutex_unlock(&pstr->oss.setup_mutex);
3053 if (pstr->oss.setup_list == NULL)
3054 pstr->oss.setup_list = setup;
3056 for (setup1 = pstr->oss.setup_list;
3057 setup1->next; setup1 = setup1->next);
3058 setup1->next = setup;
3060 template.task_name = kstrdup(task_name, GFP_KERNEL);
3061 if (! template.task_name) {
3063 buffer->error = -ENOMEM;
3064 mutex_unlock(&pstr->oss.setup_mutex);
3069 mutex_unlock(&pstr->oss.setup_mutex);
3073 static void snd_pcm_oss_proc_init(struct snd_pcm *pcm)
3076 for (stream = 0; stream < 2; ++stream) {
3077 struct snd_info_entry *entry;
3078 struct snd_pcm_str *pstr = &pcm->streams[stream];
3079 if (pstr->substream_count == 0)
3081 entry = snd_info_create_card_entry(pcm->card, "oss", pstr->proc_root);
3083 entry->content = SNDRV_INFO_CONTENT_TEXT;
3084 entry->mode = S_IFREG | 0644;
3085 entry->c.text.read = snd_pcm_oss_proc_read;
3086 entry->c.text.write = snd_pcm_oss_proc_write;
3087 entry->private_data = pstr;
3088 if (snd_info_register(entry) < 0) {
3089 snd_info_free_entry(entry);
3093 pstr->oss.proc_entry = entry;
3097 static void snd_pcm_oss_proc_done(struct snd_pcm *pcm)
3100 for (stream = 0; stream < 2; ++stream) {
3101 struct snd_pcm_str *pstr = &pcm->streams[stream];
3102 snd_info_free_entry(pstr->oss.proc_entry);
3103 pstr->oss.proc_entry = NULL;
3104 snd_pcm_oss_proc_free_setup_list(pstr);
3107 #else /* !CONFIG_SND_VERBOSE_PROCFS */
3108 static inline void snd_pcm_oss_proc_init(struct snd_pcm *pcm)
3111 static inline void snd_pcm_oss_proc_done(struct snd_pcm *pcm)
3114 #endif /* CONFIG_SND_VERBOSE_PROCFS */
3120 static const struct file_operations snd_pcm_oss_f_reg =
3122 .owner = THIS_MODULE,
3123 .read = snd_pcm_oss_read,
3124 .write = snd_pcm_oss_write,
3125 .open = snd_pcm_oss_open,
3126 .release = snd_pcm_oss_release,
3127 .llseek = no_llseek,
3128 .poll = snd_pcm_oss_poll,
3129 .unlocked_ioctl = snd_pcm_oss_ioctl,
3130 .compat_ioctl = snd_pcm_oss_ioctl_compat,
3131 .mmap = snd_pcm_oss_mmap,
3134 static void register_oss_dsp(struct snd_pcm *pcm, int index)
3136 if (snd_register_oss_device(SNDRV_OSS_DEVICE_TYPE_PCM,
3137 pcm->card, index, &snd_pcm_oss_f_reg,
3139 pcm_err(pcm, "unable to register OSS PCM device %i:%i\n",
3140 pcm->card->number, pcm->device);
3144 static int snd_pcm_oss_register_minor(struct snd_pcm *pcm)
3147 if (dsp_map[pcm->card->number] == (int)pcm->device) {
3150 register_oss_dsp(pcm, 0);
3151 duplex = (pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream_count > 0 &&
3152 pcm->streams[SNDRV_PCM_STREAM_CAPTURE].substream_count &&
3153 !(pcm->info_flags & SNDRV_PCM_INFO_HALF_DUPLEX));
3154 sprintf(name, "%s%s", pcm->name, duplex ? " (DUPLEX)" : "");
3155 #ifdef SNDRV_OSS_INFO_DEV_AUDIO
3156 snd_oss_info_register(SNDRV_OSS_INFO_DEV_AUDIO,
3161 pcm->oss.reg_mask |= 1;
3163 if (adsp_map[pcm->card->number] == (int)pcm->device) {
3164 register_oss_dsp(pcm, 1);
3166 pcm->oss.reg_mask |= 2;
3170 snd_pcm_oss_proc_init(pcm);
3175 static int snd_pcm_oss_disconnect_minor(struct snd_pcm *pcm)
3178 if (pcm->oss.reg_mask & 1) {
3179 pcm->oss.reg_mask &= ~1;
3180 snd_unregister_oss_device(SNDRV_OSS_DEVICE_TYPE_PCM,
3183 if (pcm->oss.reg_mask & 2) {
3184 pcm->oss.reg_mask &= ~2;
3185 snd_unregister_oss_device(SNDRV_OSS_DEVICE_TYPE_PCM,
3188 if (dsp_map[pcm->card->number] == (int)pcm->device) {
3189 #ifdef SNDRV_OSS_INFO_DEV_AUDIO
3190 snd_oss_info_unregister(SNDRV_OSS_INFO_DEV_AUDIO, pcm->card->number);
3198 static int snd_pcm_oss_unregister_minor(struct snd_pcm *pcm)
3200 snd_pcm_oss_disconnect_minor(pcm);
3201 snd_pcm_oss_proc_done(pcm);
3205 static struct snd_pcm_notify snd_pcm_oss_notify =
3207 .n_register = snd_pcm_oss_register_minor,
3208 .n_disconnect = snd_pcm_oss_disconnect_minor,
3209 .n_unregister = snd_pcm_oss_unregister_minor,
3212 static int __init alsa_pcm_oss_init(void)
3217 /* check device map table */
3218 for (i = 0; i < SNDRV_CARDS; i++) {
3219 if (dsp_map[i] < 0 || dsp_map[i] >= SNDRV_PCM_DEVICES) {
3220 pr_err("ALSA: pcm_oss: invalid dsp_map[%d] = %d\n",
3224 if (adsp_map[i] < 0 || adsp_map[i] >= SNDRV_PCM_DEVICES) {
3225 pr_err("ALSA: pcm_oss: invalid adsp_map[%d] = %d\n",
3230 err = snd_pcm_notify(&snd_pcm_oss_notify, 0);
3236 static void __exit alsa_pcm_oss_exit(void)
3238 snd_pcm_notify(&snd_pcm_oss_notify, 1);
3241 module_init(alsa_pcm_oss_init)
3242 module_exit(alsa_pcm_oss_exit)