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(sformat_mask, (__force int)sformat)) {
912 for (sformat = (__force snd_pcm_format_t)0;
913 (__force int)sformat <= (__force int)SNDRV_PCM_FORMAT_LAST;
914 sformat = (__force snd_pcm_format_t)((__force int)sformat + 1)) {
915 if (snd_mask_test(sformat_mask, (__force int)sformat) &&
916 snd_pcm_oss_format_to(sformat) >= 0)
919 if ((__force int)sformat > (__force int)SNDRV_PCM_FORMAT_LAST) {
920 pcm_dbg(substream->pcm, "Cannot find a format!!!\n");
925 err = _snd_pcm_hw_param_set(sparams, SNDRV_PCM_HW_PARAM_FORMAT, (__force int)sformat, 0);
930 memcpy(params, sparams, sizeof(*params));
932 _snd_pcm_hw_params_any(params);
933 _snd_pcm_hw_param_set(params, SNDRV_PCM_HW_PARAM_ACCESS,
934 (__force int)SNDRV_PCM_ACCESS_RW_INTERLEAVED, 0);
935 _snd_pcm_hw_param_set(params, SNDRV_PCM_HW_PARAM_FORMAT,
936 (__force int)snd_pcm_oss_format_from(runtime->oss.format), 0);
937 _snd_pcm_hw_param_set(params, SNDRV_PCM_HW_PARAM_CHANNELS,
938 runtime->oss.channels, 0);
939 _snd_pcm_hw_param_set(params, SNDRV_PCM_HW_PARAM_RATE,
940 runtime->oss.rate, 0);
941 pdprintf("client: access = %i, format = %i, channels = %i, rate = %i\n",
942 params_access(params), params_format(params),
943 params_channels(params), params_rate(params));
945 pdprintf("slave: access = %i, format = %i, channels = %i, rate = %i\n",
946 params_access(sparams), params_format(sparams),
947 params_channels(sparams), params_rate(sparams));
949 oss_frame_size = snd_pcm_format_physical_width(params_format(params)) *
950 params_channels(params) / 8;
952 err = snd_pcm_oss_period_size(substream, params, sparams);
956 n = snd_pcm_plug_slave_size(substream, runtime->oss.period_bytes / oss_frame_size);
957 err = snd_pcm_hw_param_near(substream, sparams, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, n, NULL);
961 err = snd_pcm_hw_param_near(substream, sparams, SNDRV_PCM_HW_PARAM_PERIODS,
962 runtime->oss.periods, NULL);
966 snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DROP, NULL);
968 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_HW_PARAMS, sparams);
970 pcm_dbg(substream->pcm, "HW_PARAMS failed: %i\n", err);
974 #ifdef CONFIG_SND_PCM_OSS_PLUGINS
975 snd_pcm_oss_plugin_clear(substream);
977 /* add necessary plugins */
978 snd_pcm_oss_plugin_clear(substream);
979 if ((err = snd_pcm_plug_format_plugins(substream,
982 pcm_dbg(substream->pcm,
983 "snd_pcm_plug_format_plugins failed: %i\n", err);
984 snd_pcm_oss_plugin_clear(substream);
987 if (runtime->oss.plugin_first) {
988 struct snd_pcm_plugin *plugin;
989 if ((err = snd_pcm_plugin_build_io(substream, sparams, &plugin)) < 0) {
990 pcm_dbg(substream->pcm,
991 "snd_pcm_plugin_build_io failed: %i\n", err);
992 snd_pcm_oss_plugin_clear(substream);
995 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
996 err = snd_pcm_plugin_append(plugin);
998 err = snd_pcm_plugin_insert(plugin);
1001 snd_pcm_oss_plugin_clear(substream);
1008 if (runtime->oss.trigger) {
1009 sw_params->start_threshold = 1;
1011 sw_params->start_threshold = runtime->boundary;
1013 if (atomic_read(&substream->mmap_count) ||
1014 substream->stream == SNDRV_PCM_STREAM_CAPTURE)
1015 sw_params->stop_threshold = runtime->boundary;
1017 sw_params->stop_threshold = runtime->buffer_size;
1018 sw_params->tstamp_mode = SNDRV_PCM_TSTAMP_NONE;
1019 sw_params->period_step = 1;
1020 sw_params->avail_min = substream->stream == SNDRV_PCM_STREAM_PLAYBACK ?
1021 1 : runtime->period_size;
1022 if (atomic_read(&substream->mmap_count) ||
1023 substream->oss.setup.nosilence) {
1024 sw_params->silence_threshold = 0;
1025 sw_params->silence_size = 0;
1027 snd_pcm_uframes_t frames;
1028 frames = runtime->period_size + 16;
1029 if (frames > runtime->buffer_size)
1030 frames = runtime->buffer_size;
1031 sw_params->silence_threshold = frames;
1032 sw_params->silence_size = frames;
1035 if ((err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_SW_PARAMS, sw_params)) < 0) {
1036 pcm_dbg(substream->pcm, "SW_PARAMS failed: %i\n", err);
1040 runtime->oss.periods = params_periods(sparams);
1041 oss_period_size = snd_pcm_plug_client_size(substream, params_period_size(sparams));
1042 if (oss_period_size < 0) {
1046 #ifdef CONFIG_SND_PCM_OSS_PLUGINS
1047 if (runtime->oss.plugin_first) {
1048 err = snd_pcm_plug_alloc(substream, oss_period_size);
1053 oss_period_size = array_size(oss_period_size, oss_frame_size);
1054 oss_buffer_size = array_size(oss_period_size, runtime->oss.periods);
1055 if (oss_buffer_size <= 0) {
1060 runtime->oss.period_bytes = oss_period_size;
1061 runtime->oss.buffer_bytes = oss_buffer_size;
1063 pdprintf("oss: period bytes = %i, buffer bytes = %i\n",
1064 runtime->oss.period_bytes,
1065 runtime->oss.buffer_bytes);
1066 pdprintf("slave: period_size = %i, buffer_size = %i\n",
1067 params_period_size(sparams),
1068 params_buffer_size(sparams));
1070 runtime->oss.format = snd_pcm_oss_format_to(params_format(params));
1071 runtime->oss.channels = params_channels(params);
1072 runtime->oss.rate = params_rate(params);
1074 kvfree(runtime->oss.buffer);
1075 runtime->oss.buffer = kvzalloc(runtime->oss.period_bytes, GFP_KERNEL);
1076 if (!runtime->oss.buffer) {
1081 runtime->oss.params = 0;
1082 runtime->oss.prepare = 1;
1083 runtime->oss.buffer_used = 0;
1084 if (runtime->dma_area)
1085 snd_pcm_format_set_silence(runtime->format, runtime->dma_area, bytes_to_samples(runtime, runtime->dma_bytes));
1087 runtime->oss.period_frames = snd_pcm_alsa_frames(substream, oss_period_size);
1097 /* this one takes the lock by itself */
1098 static int snd_pcm_oss_change_params(struct snd_pcm_substream *substream,
1101 struct snd_pcm_runtime *runtime = substream->runtime;
1105 if (!(mutex_trylock(&runtime->oss.params_lock)))
1107 } else if (mutex_lock_interruptible(&runtime->oss.params_lock))
1108 return -ERESTARTSYS;
1110 err = snd_pcm_oss_change_params_locked(substream);
1111 mutex_unlock(&runtime->oss.params_lock);
1115 static int snd_pcm_oss_get_active_substream(struct snd_pcm_oss_file *pcm_oss_file, struct snd_pcm_substream **r_substream)
1118 struct snd_pcm_substream *asubstream = NULL, *substream;
1120 for (idx = 0; idx < 2; idx++) {
1121 substream = pcm_oss_file->streams[idx];
1122 if (substream == NULL)
1124 if (asubstream == NULL)
1125 asubstream = substream;
1126 if (substream->runtime->oss.params) {
1127 err = snd_pcm_oss_change_params(substream, false);
1135 *r_substream = asubstream;
1139 /* call with params_lock held */
1140 /* NOTE: this always call PREPARE unconditionally no matter whether
1141 * runtime->oss.prepare is set or not
1143 static int snd_pcm_oss_prepare(struct snd_pcm_substream *substream)
1146 struct snd_pcm_runtime *runtime = substream->runtime;
1148 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_PREPARE, NULL);
1150 pcm_dbg(substream->pcm,
1151 "snd_pcm_oss_prepare: SNDRV_PCM_IOCTL_PREPARE failed\n");
1154 runtime->oss.prepare = 0;
1155 runtime->oss.prev_hw_ptr_period = 0;
1156 runtime->oss.period_ptr = 0;
1157 runtime->oss.buffer_used = 0;
1162 static int snd_pcm_oss_make_ready(struct snd_pcm_substream *substream)
1164 struct snd_pcm_runtime *runtime;
1167 runtime = substream->runtime;
1168 if (runtime->oss.params) {
1169 err = snd_pcm_oss_change_params(substream, false);
1173 if (runtime->oss.prepare) {
1174 if (mutex_lock_interruptible(&runtime->oss.params_lock))
1175 return -ERESTARTSYS;
1176 err = snd_pcm_oss_prepare(substream);
1177 mutex_unlock(&runtime->oss.params_lock);
1184 /* call with params_lock held */
1185 static int snd_pcm_oss_make_ready_locked(struct snd_pcm_substream *substream)
1187 struct snd_pcm_runtime *runtime;
1190 runtime = substream->runtime;
1191 if (runtime->oss.params) {
1192 err = snd_pcm_oss_change_params_locked(substream);
1196 if (runtime->oss.prepare) {
1197 err = snd_pcm_oss_prepare(substream);
1204 static int snd_pcm_oss_capture_position_fixup(struct snd_pcm_substream *substream, snd_pcm_sframes_t *delay)
1206 struct snd_pcm_runtime *runtime;
1207 snd_pcm_uframes_t frames;
1211 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DELAY, delay);
1214 runtime = substream->runtime;
1215 if (*delay <= (snd_pcm_sframes_t)runtime->buffer_size)
1217 /* in case of overrun, skip whole periods like OSS/Linux driver does */
1218 /* until avail(delay) <= buffer_size */
1219 frames = (*delay - runtime->buffer_size) + runtime->period_size - 1;
1220 frames /= runtime->period_size;
1221 frames *= runtime->period_size;
1222 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_FORWARD, &frames);
1229 snd_pcm_sframes_t snd_pcm_oss_write3(struct snd_pcm_substream *substream, const char *ptr, snd_pcm_uframes_t frames, int in_kernel)
1231 struct snd_pcm_runtime *runtime = substream->runtime;
1234 if (runtime->status->state == SNDRV_PCM_STATE_XRUN ||
1235 runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) {
1237 pcm_dbg(substream->pcm,
1238 "pcm_oss: write: recovering from %s\n",
1239 runtime->status->state == SNDRV_PCM_STATE_XRUN ?
1240 "XRUN" : "SUSPEND");
1242 ret = snd_pcm_oss_prepare(substream);
1246 ret = __snd_pcm_lib_xfer(substream, (void *)ptr, true,
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 ret = __snd_pcm_lib_xfer(substream, (void *)ptr, true,
1285 if (ret == -EPIPE) {
1286 if (runtime->status->state == SNDRV_PCM_STATE_DRAINING) {
1287 ret = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DROP, NULL);
1293 if (ret != -ESTRPIPE)
1299 #ifdef CONFIG_SND_PCM_OSS_PLUGINS
1300 snd_pcm_sframes_t snd_pcm_oss_writev3(struct snd_pcm_substream *substream, void **bufs, snd_pcm_uframes_t frames)
1302 struct snd_pcm_runtime *runtime = substream->runtime;
1305 if (runtime->status->state == SNDRV_PCM_STATE_XRUN ||
1306 runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) {
1308 pcm_dbg(substream->pcm,
1309 "pcm_oss: writev: recovering from %s\n",
1310 runtime->status->state == SNDRV_PCM_STATE_XRUN ?
1311 "XRUN" : "SUSPEND");
1313 ret = snd_pcm_oss_prepare(substream);
1317 ret = snd_pcm_kernel_writev(substream, bufs, frames);
1318 if (ret != -EPIPE && ret != -ESTRPIPE)
1321 /* test, if we can't store new data, because the stream */
1322 /* has not been started */
1323 if (runtime->status->state == SNDRV_PCM_STATE_PREPARED)
1329 snd_pcm_sframes_t snd_pcm_oss_readv3(struct snd_pcm_substream *substream, void **bufs, snd_pcm_uframes_t frames)
1331 struct snd_pcm_runtime *runtime = substream->runtime;
1334 if (runtime->status->state == SNDRV_PCM_STATE_XRUN ||
1335 runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) {
1337 pcm_dbg(substream->pcm,
1338 "pcm_oss: readv: recovering from %s\n",
1339 runtime->status->state == SNDRV_PCM_STATE_XRUN ?
1340 "XRUN" : "SUSPEND");
1342 ret = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DRAIN, NULL);
1345 } else if (runtime->status->state == SNDRV_PCM_STATE_SETUP) {
1346 ret = snd_pcm_oss_prepare(substream);
1350 ret = snd_pcm_kernel_readv(substream, bufs, frames);
1351 if (ret != -EPIPE && ret != -ESTRPIPE)
1356 #endif /* CONFIG_SND_PCM_OSS_PLUGINS */
1358 static ssize_t snd_pcm_oss_write2(struct snd_pcm_substream *substream, const char *buf, size_t bytes, int in_kernel)
1360 struct snd_pcm_runtime *runtime = substream->runtime;
1361 snd_pcm_sframes_t frames, frames1;
1362 #ifdef CONFIG_SND_PCM_OSS_PLUGINS
1363 if (runtime->oss.plugin_first) {
1364 struct snd_pcm_plugin_channel *channels;
1365 size_t oss_frame_bytes = (runtime->oss.plugin_first->src_width * runtime->oss.plugin_first->src_format.channels) / 8;
1367 if (copy_from_user(runtime->oss.buffer, (const char __force __user *)buf, bytes))
1369 buf = runtime->oss.buffer;
1371 frames = bytes / oss_frame_bytes;
1372 frames1 = snd_pcm_plug_client_channels_buf(substream, (char *)buf, frames, &channels);
1375 frames1 = snd_pcm_plug_write_transfer(substream, channels, frames1);
1378 bytes = frames1 * oss_frame_bytes;
1382 frames = bytes_to_frames(runtime, bytes);
1383 frames1 = snd_pcm_oss_write3(substream, buf, frames, in_kernel);
1386 bytes = frames_to_bytes(runtime, frames1);
1391 static ssize_t snd_pcm_oss_write1(struct snd_pcm_substream *substream, const char __user *buf, size_t bytes)
1395 struct snd_pcm_runtime *runtime = substream->runtime;
1397 if (atomic_read(&substream->mmap_count))
1400 atomic_inc(&runtime->oss.rw_ref);
1402 if (mutex_lock_interruptible(&runtime->oss.params_lock)) {
1406 tmp = snd_pcm_oss_make_ready_locked(substream);
1409 if (bytes < runtime->oss.period_bytes || runtime->oss.buffer_used > 0) {
1411 if (tmp + runtime->oss.buffer_used > runtime->oss.period_bytes)
1412 tmp = runtime->oss.period_bytes - runtime->oss.buffer_used;
1414 if (copy_from_user(runtime->oss.buffer + runtime->oss.buffer_used, buf, tmp)) {
1419 runtime->oss.buffer_used += tmp;
1423 if (substream->oss.setup.partialfrag ||
1424 runtime->oss.buffer_used == runtime->oss.period_bytes) {
1425 tmp = snd_pcm_oss_write2(substream, runtime->oss.buffer + runtime->oss.period_ptr,
1426 runtime->oss.buffer_used - runtime->oss.period_ptr, 1);
1429 runtime->oss.bytes += tmp;
1430 runtime->oss.period_ptr += tmp;
1431 runtime->oss.period_ptr %= runtime->oss.period_bytes;
1432 if (runtime->oss.period_ptr == 0 ||
1433 runtime->oss.period_ptr == runtime->oss.buffer_used)
1434 runtime->oss.buffer_used = 0;
1435 else if ((substream->f_flags & O_NONBLOCK) != 0) {
1441 tmp = snd_pcm_oss_write2(substream,
1442 (const char __force *)buf,
1443 runtime->oss.period_bytes, 0);
1446 runtime->oss.bytes += tmp;
1450 if ((substream->f_flags & O_NONBLOCK) != 0 &&
1451 tmp != runtime->oss.period_bytes)
1455 mutex_unlock(&runtime->oss.params_lock);
1458 if (signal_pending(current)) {
1464 atomic_dec(&runtime->oss.rw_ref);
1465 return xfer > 0 ? (snd_pcm_sframes_t)xfer : tmp;
1468 static ssize_t snd_pcm_oss_read2(struct snd_pcm_substream *substream, char *buf, size_t bytes, int in_kernel)
1470 struct snd_pcm_runtime *runtime = substream->runtime;
1471 snd_pcm_sframes_t frames, frames1;
1472 #ifdef CONFIG_SND_PCM_OSS_PLUGINS
1473 char __user *final_dst = (char __force __user *)buf;
1474 if (runtime->oss.plugin_first) {
1475 struct snd_pcm_plugin_channel *channels;
1476 size_t oss_frame_bytes = (runtime->oss.plugin_last->dst_width * runtime->oss.plugin_last->dst_format.channels) / 8;
1478 buf = runtime->oss.buffer;
1479 frames = bytes / oss_frame_bytes;
1480 frames1 = snd_pcm_plug_client_channels_buf(substream, buf, frames, &channels);
1483 frames1 = snd_pcm_plug_read_transfer(substream, channels, frames1);
1486 bytes = frames1 * oss_frame_bytes;
1487 if (!in_kernel && copy_to_user(final_dst, buf, bytes))
1492 frames = bytes_to_frames(runtime, bytes);
1493 frames1 = snd_pcm_oss_read3(substream, buf, frames, in_kernel);
1496 bytes = frames_to_bytes(runtime, frames1);
1501 static ssize_t snd_pcm_oss_read1(struct snd_pcm_substream *substream, char __user *buf, size_t bytes)
1505 struct snd_pcm_runtime *runtime = substream->runtime;
1507 if (atomic_read(&substream->mmap_count))
1510 atomic_inc(&runtime->oss.rw_ref);
1512 if (mutex_lock_interruptible(&runtime->oss.params_lock)) {
1516 tmp = snd_pcm_oss_make_ready_locked(substream);
1519 if (bytes < runtime->oss.period_bytes || runtime->oss.buffer_used > 0) {
1520 if (runtime->oss.buffer_used == 0) {
1521 tmp = snd_pcm_oss_read2(substream, runtime->oss.buffer, runtime->oss.period_bytes, 1);
1524 runtime->oss.bytes += tmp;
1525 runtime->oss.period_ptr = tmp;
1526 runtime->oss.buffer_used = tmp;
1529 if ((size_t) tmp > runtime->oss.buffer_used)
1530 tmp = runtime->oss.buffer_used;
1531 if (copy_to_user(buf, runtime->oss.buffer + (runtime->oss.period_ptr - runtime->oss.buffer_used), tmp)) {
1538 runtime->oss.buffer_used -= tmp;
1540 tmp = snd_pcm_oss_read2(substream, (char __force *)buf,
1541 runtime->oss.period_bytes, 0);
1544 runtime->oss.bytes += tmp;
1550 mutex_unlock(&runtime->oss.params_lock);
1553 if (signal_pending(current)) {
1559 atomic_dec(&runtime->oss.rw_ref);
1560 return xfer > 0 ? (snd_pcm_sframes_t)xfer : tmp;
1563 static int snd_pcm_oss_reset(struct snd_pcm_oss_file *pcm_oss_file)
1565 struct snd_pcm_substream *substream;
1566 struct snd_pcm_runtime *runtime;
1569 for (i = 0; i < 2; i++) {
1570 substream = pcm_oss_file->streams[i];
1573 runtime = substream->runtime;
1574 snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DROP, NULL);
1575 mutex_lock(&runtime->oss.params_lock);
1576 runtime->oss.prepare = 1;
1577 runtime->oss.buffer_used = 0;
1578 runtime->oss.prev_hw_ptr_period = 0;
1579 runtime->oss.period_ptr = 0;
1580 mutex_unlock(&runtime->oss.params_lock);
1585 static int snd_pcm_oss_post(struct snd_pcm_oss_file *pcm_oss_file)
1587 struct snd_pcm_substream *substream;
1590 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
1591 if (substream != NULL) {
1592 if ((err = snd_pcm_oss_make_ready(substream)) < 0)
1594 snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_START, NULL);
1596 /* note: all errors from the start action are ignored */
1597 /* OSS apps do not know, how to handle them */
1601 static int snd_pcm_oss_sync1(struct snd_pcm_substream *substream, size_t size)
1603 struct snd_pcm_runtime *runtime;
1605 snd_pcm_state_t state;
1607 wait_queue_entry_t wait;
1609 runtime = substream->runtime;
1610 init_waitqueue_entry(&wait, current);
1611 add_wait_queue(&runtime->sleep, &wait);
1613 pcm_dbg(substream->pcm, "sync1: size = %li\n", size);
1616 result = snd_pcm_oss_write2(substream, runtime->oss.buffer, size, 1);
1618 runtime->oss.buffer_used = 0;
1622 if (result != 0 && result != -EAGAIN)
1625 set_current_state(TASK_INTERRUPTIBLE);
1626 snd_pcm_stream_lock_irq(substream);
1627 state = runtime->status->state;
1628 snd_pcm_stream_unlock_irq(substream);
1629 if (state != SNDRV_PCM_STATE_RUNNING) {
1630 set_current_state(TASK_RUNNING);
1633 res = schedule_timeout(10 * HZ);
1634 if (signal_pending(current)) {
1635 result = -ERESTARTSYS;
1639 pcm_err(substream->pcm,
1640 "OSS sync error - DMA timeout\n");
1645 remove_wait_queue(&runtime->sleep, &wait);
1649 static int snd_pcm_oss_sync(struct snd_pcm_oss_file *pcm_oss_file)
1652 unsigned int saved_f_flags;
1653 struct snd_pcm_substream *substream;
1654 struct snd_pcm_runtime *runtime;
1655 snd_pcm_format_t format;
1656 unsigned long width;
1659 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
1660 if (substream != NULL) {
1661 runtime = substream->runtime;
1662 if (atomic_read(&substream->mmap_count))
1664 atomic_inc(&runtime->oss.rw_ref);
1665 if (mutex_lock_interruptible(&runtime->oss.params_lock)) {
1666 atomic_dec(&runtime->oss.rw_ref);
1667 return -ERESTARTSYS;
1669 err = snd_pcm_oss_make_ready_locked(substream);
1672 format = snd_pcm_oss_format_from(runtime->oss.format);
1673 width = snd_pcm_format_physical_width(format);
1674 if (runtime->oss.buffer_used > 0) {
1676 pcm_dbg(substream->pcm, "sync: buffer_used\n");
1678 size = (8 * (runtime->oss.period_bytes - runtime->oss.buffer_used) + 7) / width;
1679 snd_pcm_format_set_silence(format,
1680 runtime->oss.buffer + runtime->oss.buffer_used,
1682 err = snd_pcm_oss_sync1(substream, runtime->oss.period_bytes);
1685 } else if (runtime->oss.period_ptr > 0) {
1687 pcm_dbg(substream->pcm, "sync: period_ptr\n");
1689 size = runtime->oss.period_bytes - runtime->oss.period_ptr;
1690 snd_pcm_format_set_silence(format,
1691 runtime->oss.buffer,
1693 err = snd_pcm_oss_sync1(substream, size);
1698 * The ALSA's period might be a bit large than OSS one.
1699 * Fill the remain portion of ALSA period with zeros.
1701 size = runtime->control->appl_ptr % runtime->period_size;
1703 size = runtime->period_size - size;
1704 if (runtime->access == SNDRV_PCM_ACCESS_RW_INTERLEAVED)
1705 snd_pcm_lib_write(substream, NULL, size);
1706 else if (runtime->access == SNDRV_PCM_ACCESS_RW_NONINTERLEAVED)
1707 snd_pcm_lib_writev(substream, NULL, size);
1710 mutex_unlock(&runtime->oss.params_lock);
1711 atomic_dec(&runtime->oss.rw_ref);
1715 * finish sync: drain the buffer
1718 saved_f_flags = substream->f_flags;
1719 substream->f_flags &= ~O_NONBLOCK;
1720 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DRAIN, NULL);
1721 substream->f_flags = saved_f_flags;
1724 mutex_lock(&runtime->oss.params_lock);
1725 runtime->oss.prepare = 1;
1726 mutex_unlock(&runtime->oss.params_lock);
1729 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
1730 if (substream != NULL) {
1731 if ((err = snd_pcm_oss_make_ready(substream)) < 0)
1733 runtime = substream->runtime;
1734 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DROP, NULL);
1737 mutex_lock(&runtime->oss.params_lock);
1738 runtime->oss.buffer_used = 0;
1739 runtime->oss.prepare = 1;
1740 mutex_unlock(&runtime->oss.params_lock);
1745 static int snd_pcm_oss_set_rate(struct snd_pcm_oss_file *pcm_oss_file, int rate)
1749 for (idx = 1; idx >= 0; --idx) {
1750 struct snd_pcm_substream *substream = pcm_oss_file->streams[idx];
1751 struct snd_pcm_runtime *runtime;
1754 if (substream == NULL)
1756 runtime = substream->runtime;
1759 else if (rate > 192000)
1761 err = lock_params(runtime);
1764 if (runtime->oss.rate != rate) {
1765 runtime->oss.params = 1;
1766 runtime->oss.rate = rate;
1768 unlock_params(runtime);
1770 return snd_pcm_oss_get_rate(pcm_oss_file);
1773 static int snd_pcm_oss_get_rate(struct snd_pcm_oss_file *pcm_oss_file)
1775 struct snd_pcm_substream *substream;
1778 if ((err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream)) < 0)
1780 return substream->runtime->oss.rate;
1783 static int snd_pcm_oss_set_channels(struct snd_pcm_oss_file *pcm_oss_file, unsigned int channels)
1790 for (idx = 1; idx >= 0; --idx) {
1791 struct snd_pcm_substream *substream = pcm_oss_file->streams[idx];
1792 struct snd_pcm_runtime *runtime;
1795 if (substream == NULL)
1797 runtime = substream->runtime;
1798 err = lock_params(runtime);
1801 if (runtime->oss.channels != channels) {
1802 runtime->oss.params = 1;
1803 runtime->oss.channels = channels;
1805 unlock_params(runtime);
1807 return snd_pcm_oss_get_channels(pcm_oss_file);
1810 static int snd_pcm_oss_get_channels(struct snd_pcm_oss_file *pcm_oss_file)
1812 struct snd_pcm_substream *substream;
1815 if ((err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream)) < 0)
1817 return substream->runtime->oss.channels;
1820 static int snd_pcm_oss_get_block_size(struct snd_pcm_oss_file *pcm_oss_file)
1822 struct snd_pcm_substream *substream;
1825 if ((err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream)) < 0)
1827 return substream->runtime->oss.period_bytes;
1830 static int snd_pcm_oss_get_formats(struct snd_pcm_oss_file *pcm_oss_file)
1832 struct snd_pcm_substream *substream;
1835 struct snd_pcm_hw_params *params;
1836 unsigned int formats = 0;
1837 const struct snd_mask *format_mask;
1840 if ((err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream)) < 0)
1842 if (atomic_read(&substream->mmap_count))
1845 direct = substream->oss.setup.direct;
1847 return AFMT_MU_LAW | AFMT_U8 |
1848 AFMT_S16_LE | AFMT_S16_BE |
1849 AFMT_S8 | AFMT_U16_LE |
1851 AFMT_S32_LE | AFMT_S32_BE |
1852 AFMT_S24_LE | AFMT_S24_BE |
1854 params = kmalloc(sizeof(*params), GFP_KERNEL);
1857 _snd_pcm_hw_params_any(params);
1858 err = snd_pcm_hw_refine(substream, params);
1861 format_mask = hw_param_mask_c(params, SNDRV_PCM_HW_PARAM_FORMAT);
1862 for (fmt = 0; fmt < 32; ++fmt) {
1863 if (snd_mask_test(format_mask, fmt)) {
1864 int f = snd_pcm_oss_format_to((__force snd_pcm_format_t)fmt);
1872 return err < 0 ? err : formats;
1875 static int snd_pcm_oss_set_format(struct snd_pcm_oss_file *pcm_oss_file, int format)
1880 if (format != AFMT_QUERY) {
1881 formats = snd_pcm_oss_get_formats(pcm_oss_file);
1884 if (!(formats & format))
1886 for (idx = 1; idx >= 0; --idx) {
1887 struct snd_pcm_substream *substream = pcm_oss_file->streams[idx];
1888 struct snd_pcm_runtime *runtime;
1889 if (substream == NULL)
1891 runtime = substream->runtime;
1892 err = lock_params(runtime);
1895 if (runtime->oss.format != format) {
1896 runtime->oss.params = 1;
1897 runtime->oss.format = format;
1899 unlock_params(runtime);
1902 return snd_pcm_oss_get_format(pcm_oss_file);
1905 static int snd_pcm_oss_get_format(struct snd_pcm_oss_file *pcm_oss_file)
1907 struct snd_pcm_substream *substream;
1910 if ((err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream)) < 0)
1912 return substream->runtime->oss.format;
1915 static int snd_pcm_oss_set_subdivide1(struct snd_pcm_substream *substream, int subdivide)
1917 struct snd_pcm_runtime *runtime;
1919 runtime = substream->runtime;
1920 if (subdivide == 0) {
1921 subdivide = runtime->oss.subdivision;
1926 if (runtime->oss.subdivision || runtime->oss.fragshift)
1928 if (subdivide != 1 && subdivide != 2 && subdivide != 4 &&
1929 subdivide != 8 && subdivide != 16)
1931 runtime->oss.subdivision = subdivide;
1932 runtime->oss.params = 1;
1936 static int snd_pcm_oss_set_subdivide(struct snd_pcm_oss_file *pcm_oss_file, int subdivide)
1938 int err = -EINVAL, idx;
1940 for (idx = 1; idx >= 0; --idx) {
1941 struct snd_pcm_substream *substream = pcm_oss_file->streams[idx];
1942 struct snd_pcm_runtime *runtime;
1944 if (substream == NULL)
1946 runtime = substream->runtime;
1947 err = lock_params(runtime);
1950 err = snd_pcm_oss_set_subdivide1(substream, subdivide);
1951 unlock_params(runtime);
1958 static int snd_pcm_oss_set_fragment1(struct snd_pcm_substream *substream, unsigned int val)
1960 struct snd_pcm_runtime *runtime;
1963 runtime = substream->runtime;
1964 if (runtime->oss.subdivision || runtime->oss.fragshift)
1966 fragshift = val & 0xffff;
1967 if (fragshift >= 25) /* should be large enough */
1969 runtime->oss.fragshift = fragshift;
1970 runtime->oss.maxfrags = (val >> 16) & 0xffff;
1971 if (runtime->oss.fragshift < 4) /* < 16 */
1972 runtime->oss.fragshift = 4;
1973 if (runtime->oss.maxfrags < 2)
1974 runtime->oss.maxfrags = 2;
1975 runtime->oss.params = 1;
1979 static int snd_pcm_oss_set_fragment(struct snd_pcm_oss_file *pcm_oss_file, unsigned int val)
1981 int err = -EINVAL, idx;
1983 for (idx = 1; idx >= 0; --idx) {
1984 struct snd_pcm_substream *substream = pcm_oss_file->streams[idx];
1985 struct snd_pcm_runtime *runtime;
1987 if (substream == NULL)
1989 runtime = substream->runtime;
1990 err = lock_params(runtime);
1993 err = snd_pcm_oss_set_fragment1(substream, val);
1994 unlock_params(runtime);
2001 static int snd_pcm_oss_nonblock(struct file * file)
2003 spin_lock(&file->f_lock);
2004 file->f_flags |= O_NONBLOCK;
2005 spin_unlock(&file->f_lock);
2009 static int snd_pcm_oss_get_caps1(struct snd_pcm_substream *substream, int res)
2012 if (substream == NULL) {
2013 res &= ~DSP_CAP_DUPLEX;
2016 #ifdef DSP_CAP_MULTI
2017 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
2018 if (substream->pstr->substream_count > 1)
2019 res |= DSP_CAP_MULTI;
2021 /* DSP_CAP_REALTIME is set all times: */
2022 /* all ALSA drivers can return actual pointer in ring buffer */
2023 #if defined(DSP_CAP_REALTIME) && 0
2025 struct snd_pcm_runtime *runtime = substream->runtime;
2026 if (runtime->info & (SNDRV_PCM_INFO_BLOCK_TRANSFER|SNDRV_PCM_INFO_BATCH))
2027 res &= ~DSP_CAP_REALTIME;
2033 static int snd_pcm_oss_get_caps(struct snd_pcm_oss_file *pcm_oss_file)
2037 result = DSP_CAP_TRIGGER | DSP_CAP_MMAP | DSP_CAP_DUPLEX | DSP_CAP_REALTIME;
2038 for (idx = 0; idx < 2; idx++) {
2039 struct snd_pcm_substream *substream = pcm_oss_file->streams[idx];
2040 result = snd_pcm_oss_get_caps1(substream, result);
2042 result |= 0x0001; /* revision - same as SB AWE 64 */
2046 static void snd_pcm_oss_simulate_fill(struct snd_pcm_substream *substream,
2047 snd_pcm_uframes_t hw_ptr)
2049 struct snd_pcm_runtime *runtime = substream->runtime;
2050 snd_pcm_uframes_t appl_ptr;
2051 appl_ptr = hw_ptr + runtime->buffer_size;
2052 appl_ptr %= runtime->boundary;
2053 runtime->control->appl_ptr = appl_ptr;
2056 static int snd_pcm_oss_set_trigger(struct snd_pcm_oss_file *pcm_oss_file, int trigger)
2058 struct snd_pcm_runtime *runtime;
2059 struct snd_pcm_substream *psubstream = NULL, *csubstream = NULL;
2063 pr_debug("pcm_oss: trigger = 0x%x\n", trigger);
2066 psubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
2067 csubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
2070 if ((err = snd_pcm_oss_make_ready(psubstream)) < 0)
2074 if ((err = snd_pcm_oss_make_ready(csubstream)) < 0)
2078 runtime = psubstream->runtime;
2080 if (mutex_lock_interruptible(&runtime->oss.params_lock))
2081 return -ERESTARTSYS;
2082 if (trigger & PCM_ENABLE_OUTPUT) {
2083 if (runtime->oss.trigger)
2085 if (atomic_read(&psubstream->mmap_count))
2086 snd_pcm_oss_simulate_fill(psubstream,
2087 get_hw_ptr_period(runtime));
2088 runtime->oss.trigger = 1;
2089 runtime->start_threshold = 1;
2090 cmd = SNDRV_PCM_IOCTL_START;
2092 if (!runtime->oss.trigger)
2094 runtime->oss.trigger = 0;
2095 runtime->start_threshold = runtime->boundary;
2096 cmd = SNDRV_PCM_IOCTL_DROP;
2097 runtime->oss.prepare = 1;
2100 mutex_unlock(&runtime->oss.params_lock);
2102 err = snd_pcm_kernel_ioctl(psubstream, cmd, NULL);
2108 runtime = csubstream->runtime;
2110 if (mutex_lock_interruptible(&runtime->oss.params_lock))
2111 return -ERESTARTSYS;
2112 if (trigger & PCM_ENABLE_INPUT) {
2113 if (runtime->oss.trigger)
2115 runtime->oss.trigger = 1;
2116 runtime->start_threshold = 1;
2117 cmd = SNDRV_PCM_IOCTL_START;
2119 if (!runtime->oss.trigger)
2121 runtime->oss.trigger = 0;
2122 runtime->start_threshold = runtime->boundary;
2123 cmd = SNDRV_PCM_IOCTL_DROP;
2124 runtime->oss.prepare = 1;
2127 mutex_unlock(&runtime->oss.params_lock);
2129 err = snd_pcm_kernel_ioctl(csubstream, cmd, NULL);
2137 static int snd_pcm_oss_get_trigger(struct snd_pcm_oss_file *pcm_oss_file)
2139 struct snd_pcm_substream *psubstream = NULL, *csubstream = NULL;
2142 psubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
2143 csubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
2144 if (psubstream && psubstream->runtime && psubstream->runtime->oss.trigger)
2145 result |= PCM_ENABLE_OUTPUT;
2146 if (csubstream && csubstream->runtime && csubstream->runtime->oss.trigger)
2147 result |= PCM_ENABLE_INPUT;
2151 static int snd_pcm_oss_get_odelay(struct snd_pcm_oss_file *pcm_oss_file)
2153 struct snd_pcm_substream *substream;
2154 struct snd_pcm_runtime *runtime;
2155 snd_pcm_sframes_t delay;
2158 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
2159 if (substream == NULL)
2161 if ((err = snd_pcm_oss_make_ready(substream)) < 0)
2163 runtime = substream->runtime;
2164 if (runtime->oss.params || runtime->oss.prepare)
2166 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DELAY, &delay);
2168 delay = 0; /* hack for broken OSS applications */
2171 return snd_pcm_oss_bytes(substream, delay);
2174 static int snd_pcm_oss_get_ptr(struct snd_pcm_oss_file *pcm_oss_file, int stream, struct count_info __user * _info)
2176 struct snd_pcm_substream *substream;
2177 struct snd_pcm_runtime *runtime;
2178 snd_pcm_sframes_t delay;
2180 struct count_info info;
2185 substream = pcm_oss_file->streams[stream];
2186 if (substream == NULL)
2188 if ((err = snd_pcm_oss_make_ready(substream)) < 0)
2190 runtime = substream->runtime;
2191 if (runtime->oss.params || runtime->oss.prepare) {
2192 memset(&info, 0, sizeof(info));
2193 if (copy_to_user(_info, &info, sizeof(info)))
2197 if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
2198 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DELAY, &delay);
2199 if (err == -EPIPE || err == -ESTRPIPE || (! err && delay < 0)) {
2204 fixup = runtime->oss.buffer_used;
2207 err = snd_pcm_oss_capture_position_fixup(substream, &delay);
2208 fixup = -runtime->oss.buffer_used;
2212 info.ptr = snd_pcm_oss_bytes(substream, runtime->status->hw_ptr % runtime->buffer_size);
2213 if (atomic_read(&substream->mmap_count)) {
2214 snd_pcm_sframes_t n;
2215 delay = get_hw_ptr_period(runtime);
2216 n = delay - runtime->oss.prev_hw_ptr_period;
2218 n += runtime->boundary;
2219 info.blocks = n / runtime->period_size;
2220 runtime->oss.prev_hw_ptr_period = delay;
2221 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
2222 snd_pcm_oss_simulate_fill(substream, delay);
2223 info.bytes = snd_pcm_oss_bytes(substream, runtime->status->hw_ptr) & INT_MAX;
2225 delay = snd_pcm_oss_bytes(substream, delay);
2226 if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
2227 if (substream->oss.setup.buggyptr)
2228 info.blocks = (runtime->oss.buffer_bytes - delay - fixup) / runtime->oss.period_bytes;
2230 info.blocks = (delay + fixup) / runtime->oss.period_bytes;
2231 info.bytes = (runtime->oss.bytes - delay) & INT_MAX;
2234 info.blocks = delay / runtime->oss.period_bytes;
2235 info.bytes = (runtime->oss.bytes + delay) & INT_MAX;
2238 if (copy_to_user(_info, &info, sizeof(info)))
2243 static int snd_pcm_oss_get_space(struct snd_pcm_oss_file *pcm_oss_file, int stream, struct audio_buf_info __user *_info)
2245 struct snd_pcm_substream *substream;
2246 struct snd_pcm_runtime *runtime;
2247 snd_pcm_sframes_t avail;
2249 struct audio_buf_info info;
2254 substream = pcm_oss_file->streams[stream];
2255 if (substream == NULL)
2257 runtime = substream->runtime;
2259 if (runtime->oss.params &&
2260 (err = snd_pcm_oss_change_params(substream, false)) < 0)
2263 info.fragsize = runtime->oss.period_bytes;
2264 info.fragstotal = runtime->periods;
2265 if (runtime->oss.prepare) {
2266 if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
2267 info.bytes = runtime->oss.period_bytes * runtime->oss.periods;
2268 info.fragments = runtime->oss.periods;
2274 if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
2275 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DELAY, &avail);
2276 if (err == -EPIPE || err == -ESTRPIPE || (! err && avail < 0)) {
2277 avail = runtime->buffer_size;
2281 avail = runtime->buffer_size - avail;
2282 fixup = -runtime->oss.buffer_used;
2285 err = snd_pcm_oss_capture_position_fixup(substream, &avail);
2286 fixup = runtime->oss.buffer_used;
2290 info.bytes = snd_pcm_oss_bytes(substream, avail) + fixup;
2291 info.fragments = info.bytes / runtime->oss.period_bytes;
2295 pcm_dbg(substream->pcm,
2296 "pcm_oss: space: bytes = %i, fragments = %i, fragstotal = %i, fragsize = %i\n",
2297 info.bytes, info.fragments, info.fragstotal, info.fragsize);
2299 if (copy_to_user(_info, &info, sizeof(info)))
2304 static int snd_pcm_oss_get_mapbuf(struct snd_pcm_oss_file *pcm_oss_file, int stream, struct buffmem_desc __user * _info)
2306 // it won't be probably implemented
2307 // pr_debug("TODO: snd_pcm_oss_get_mapbuf\n");
2311 static const char *strip_task_path(const char *path)
2313 const char *ptr, *ptrl = NULL;
2314 for (ptr = path; *ptr; ptr++) {
2321 static void snd_pcm_oss_look_for_setup(struct snd_pcm *pcm, int stream,
2322 const char *task_name,
2323 struct snd_pcm_oss_setup *rsetup)
2325 struct snd_pcm_oss_setup *setup;
2327 mutex_lock(&pcm->streams[stream].oss.setup_mutex);
2329 for (setup = pcm->streams[stream].oss.setup_list; setup;
2330 setup = setup->next) {
2331 if (!strcmp(setup->task_name, task_name))
2334 } while ((task_name = strip_task_path(task_name)) != NULL);
2338 mutex_unlock(&pcm->streams[stream].oss.setup_mutex);
2341 static void snd_pcm_oss_release_substream(struct snd_pcm_substream *substream)
2343 struct snd_pcm_runtime *runtime;
2344 runtime = substream->runtime;
2345 kvfree(runtime->oss.buffer);
2346 runtime->oss.buffer = NULL;
2347 #ifdef CONFIG_SND_PCM_OSS_PLUGINS
2348 snd_pcm_oss_plugin_clear(substream);
2350 substream->oss.oss = 0;
2353 static void snd_pcm_oss_init_substream(struct snd_pcm_substream *substream,
2354 struct snd_pcm_oss_setup *setup,
2357 struct snd_pcm_runtime *runtime;
2359 substream->oss.oss = 1;
2360 substream->oss.setup = *setup;
2361 if (setup->nonblock)
2362 substream->f_flags |= O_NONBLOCK;
2363 else if (setup->block)
2364 substream->f_flags &= ~O_NONBLOCK;
2365 runtime = substream->runtime;
2366 runtime->oss.params = 1;
2367 runtime->oss.trigger = 1;
2368 runtime->oss.rate = 8000;
2369 mutex_init(&runtime->oss.params_lock);
2370 switch (SNDRV_MINOR_OSS_DEVICE(minor)) {
2371 case SNDRV_MINOR_OSS_PCM_8:
2372 runtime->oss.format = AFMT_U8;
2374 case SNDRV_MINOR_OSS_PCM_16:
2375 runtime->oss.format = AFMT_S16_LE;
2378 runtime->oss.format = AFMT_MU_LAW;
2380 runtime->oss.channels = 1;
2381 runtime->oss.fragshift = 0;
2382 runtime->oss.maxfrags = 0;
2383 runtime->oss.subdivision = 0;
2384 substream->pcm_release = snd_pcm_oss_release_substream;
2385 atomic_set(&runtime->oss.rw_ref, 0);
2388 static int snd_pcm_oss_release_file(struct snd_pcm_oss_file *pcm_oss_file)
2393 for (cidx = 0; cidx < 2; ++cidx) {
2394 struct snd_pcm_substream *substream = pcm_oss_file->streams[cidx];
2396 snd_pcm_release_substream(substream);
2398 kfree(pcm_oss_file);
2402 static int snd_pcm_oss_open_file(struct file *file,
2403 struct snd_pcm *pcm,
2404 struct snd_pcm_oss_file **rpcm_oss_file,
2406 struct snd_pcm_oss_setup *setup)
2409 struct snd_pcm_oss_file *pcm_oss_file;
2410 struct snd_pcm_substream *substream;
2411 fmode_t f_mode = file->f_mode;
2414 *rpcm_oss_file = NULL;
2416 pcm_oss_file = kzalloc(sizeof(*pcm_oss_file), GFP_KERNEL);
2417 if (pcm_oss_file == NULL)
2420 if ((f_mode & (FMODE_WRITE|FMODE_READ)) == (FMODE_WRITE|FMODE_READ) &&
2421 (pcm->info_flags & SNDRV_PCM_INFO_HALF_DUPLEX))
2422 f_mode = FMODE_WRITE;
2424 file->f_flags &= ~O_APPEND;
2425 for (idx = 0; idx < 2; idx++) {
2426 if (setup[idx].disable)
2428 if (! pcm->streams[idx].substream_count)
2429 continue; /* no matching substream */
2430 if (idx == SNDRV_PCM_STREAM_PLAYBACK) {
2431 if (! (f_mode & FMODE_WRITE))
2434 if (! (f_mode & FMODE_READ))
2437 err = snd_pcm_open_substream(pcm, idx, file, &substream);
2439 snd_pcm_oss_release_file(pcm_oss_file);
2443 pcm_oss_file->streams[idx] = substream;
2444 snd_pcm_oss_init_substream(substream, &setup[idx], minor);
2447 if (!pcm_oss_file->streams[0] && !pcm_oss_file->streams[1]) {
2448 snd_pcm_oss_release_file(pcm_oss_file);
2452 file->private_data = pcm_oss_file;
2454 *rpcm_oss_file = pcm_oss_file;
2459 static int snd_task_name(struct task_struct *task, char *name, size_t size)
2463 if (snd_BUG_ON(!task || !name || size < 2))
2465 for (idx = 0; idx < sizeof(task->comm) && idx + 1 < size; idx++)
2466 name[idx] = task->comm[idx];
2471 static int snd_pcm_oss_open(struct inode *inode, struct file *file)
2475 struct snd_pcm *pcm;
2476 struct snd_pcm_oss_file *pcm_oss_file;
2477 struct snd_pcm_oss_setup setup[2];
2479 wait_queue_entry_t wait;
2481 err = nonseekable_open(inode, file);
2485 pcm = snd_lookup_oss_minor_data(iminor(inode),
2486 SNDRV_OSS_DEVICE_TYPE_PCM);
2491 err = snd_card_file_add(pcm->card, file);
2494 if (!try_module_get(pcm->card->module)) {
2498 if (snd_task_name(current, task_name, sizeof(task_name)) < 0) {
2502 memset(setup, 0, sizeof(setup));
2503 if (file->f_mode & FMODE_WRITE)
2504 snd_pcm_oss_look_for_setup(pcm, SNDRV_PCM_STREAM_PLAYBACK,
2505 task_name, &setup[0]);
2506 if (file->f_mode & FMODE_READ)
2507 snd_pcm_oss_look_for_setup(pcm, SNDRV_PCM_STREAM_CAPTURE,
2508 task_name, &setup[1]);
2510 nonblock = !!(file->f_flags & O_NONBLOCK);
2512 nonblock = nonblock_open;
2514 init_waitqueue_entry(&wait, current);
2515 add_wait_queue(&pcm->open_wait, &wait);
2516 mutex_lock(&pcm->open_mutex);
2518 err = snd_pcm_oss_open_file(file, pcm, &pcm_oss_file,
2519 iminor(inode), setup);
2522 if (err == -EAGAIN) {
2529 set_current_state(TASK_INTERRUPTIBLE);
2530 mutex_unlock(&pcm->open_mutex);
2532 mutex_lock(&pcm->open_mutex);
2533 if (pcm->card->shutdown) {
2537 if (signal_pending(current)) {
2542 remove_wait_queue(&pcm->open_wait, &wait);
2543 mutex_unlock(&pcm->open_mutex);
2546 snd_card_unref(pcm->card);
2550 module_put(pcm->card->module);
2552 snd_card_file_remove(pcm->card, file);
2555 snd_card_unref(pcm->card);
2559 static int snd_pcm_oss_release(struct inode *inode, struct file *file)
2561 struct snd_pcm *pcm;
2562 struct snd_pcm_substream *substream;
2563 struct snd_pcm_oss_file *pcm_oss_file;
2565 pcm_oss_file = file->private_data;
2566 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
2567 if (substream == NULL)
2568 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
2569 if (snd_BUG_ON(!substream))
2571 pcm = substream->pcm;
2572 if (!pcm->card->shutdown)
2573 snd_pcm_oss_sync(pcm_oss_file);
2574 mutex_lock(&pcm->open_mutex);
2575 snd_pcm_oss_release_file(pcm_oss_file);
2576 mutex_unlock(&pcm->open_mutex);
2577 wake_up(&pcm->open_wait);
2578 module_put(pcm->card->module);
2579 snd_card_file_remove(pcm->card, file);
2583 static long snd_pcm_oss_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
2585 struct snd_pcm_oss_file *pcm_oss_file;
2586 int __user *p = (int __user *)arg;
2589 pcm_oss_file = file->private_data;
2590 if (cmd == OSS_GETVERSION)
2591 return put_user(SNDRV_OSS_VERSION, p);
2592 if (cmd == OSS_ALSAEMULVER)
2593 return put_user(1, p);
2594 #if IS_REACHABLE(CONFIG_SND_MIXER_OSS)
2595 if (((cmd >> 8) & 0xff) == 'M') { /* mixer ioctl - for OSS compatibility */
2596 struct snd_pcm_substream *substream;
2598 for (idx = 0; idx < 2; ++idx) {
2599 substream = pcm_oss_file->streams[idx];
2600 if (substream != NULL)
2603 if (snd_BUG_ON(idx >= 2))
2605 return snd_mixer_oss_ioctl_card(substream->pcm->card, cmd, arg);
2608 if (((cmd >> 8) & 0xff) != 'P')
2611 pr_debug("pcm_oss: ioctl = 0x%x\n", cmd);
2614 case SNDCTL_DSP_RESET:
2615 return snd_pcm_oss_reset(pcm_oss_file);
2616 case SNDCTL_DSP_SYNC:
2617 return snd_pcm_oss_sync(pcm_oss_file);
2618 case SNDCTL_DSP_SPEED:
2619 if (get_user(res, p))
2621 if ((res = snd_pcm_oss_set_rate(pcm_oss_file, res))<0)
2623 return put_user(res, p);
2624 case SOUND_PCM_READ_RATE:
2625 res = snd_pcm_oss_get_rate(pcm_oss_file);
2628 return put_user(res, p);
2629 case SNDCTL_DSP_STEREO:
2630 if (get_user(res, p))
2632 res = res > 0 ? 2 : 1;
2633 if ((res = snd_pcm_oss_set_channels(pcm_oss_file, res)) < 0)
2635 return put_user(--res, p);
2636 case SNDCTL_DSP_GETBLKSIZE:
2637 res = snd_pcm_oss_get_block_size(pcm_oss_file);
2640 return put_user(res, p);
2641 case SNDCTL_DSP_SETFMT:
2642 if (get_user(res, p))
2644 res = snd_pcm_oss_set_format(pcm_oss_file, res);
2647 return put_user(res, p);
2648 case SOUND_PCM_READ_BITS:
2649 res = snd_pcm_oss_get_format(pcm_oss_file);
2652 return put_user(res, p);
2653 case SNDCTL_DSP_CHANNELS:
2654 if (get_user(res, p))
2656 res = snd_pcm_oss_set_channels(pcm_oss_file, res);
2659 return put_user(res, p);
2660 case SOUND_PCM_READ_CHANNELS:
2661 res = snd_pcm_oss_get_channels(pcm_oss_file);
2664 return put_user(res, p);
2665 case SOUND_PCM_WRITE_FILTER:
2666 case SOUND_PCM_READ_FILTER:
2668 case SNDCTL_DSP_POST:
2669 return snd_pcm_oss_post(pcm_oss_file);
2670 case SNDCTL_DSP_SUBDIVIDE:
2671 if (get_user(res, p))
2673 res = snd_pcm_oss_set_subdivide(pcm_oss_file, res);
2676 return put_user(res, p);
2677 case SNDCTL_DSP_SETFRAGMENT:
2678 if (get_user(res, p))
2680 return snd_pcm_oss_set_fragment(pcm_oss_file, res);
2681 case SNDCTL_DSP_GETFMTS:
2682 res = snd_pcm_oss_get_formats(pcm_oss_file);
2685 return put_user(res, p);
2686 case SNDCTL_DSP_GETOSPACE:
2687 case SNDCTL_DSP_GETISPACE:
2688 return snd_pcm_oss_get_space(pcm_oss_file,
2689 cmd == SNDCTL_DSP_GETISPACE ?
2690 SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK,
2691 (struct audio_buf_info __user *) arg);
2692 case SNDCTL_DSP_NONBLOCK:
2693 return snd_pcm_oss_nonblock(file);
2694 case SNDCTL_DSP_GETCAPS:
2695 res = snd_pcm_oss_get_caps(pcm_oss_file);
2698 return put_user(res, p);
2699 case SNDCTL_DSP_GETTRIGGER:
2700 res = snd_pcm_oss_get_trigger(pcm_oss_file);
2703 return put_user(res, p);
2704 case SNDCTL_DSP_SETTRIGGER:
2705 if (get_user(res, p))
2707 return snd_pcm_oss_set_trigger(pcm_oss_file, res);
2708 case SNDCTL_DSP_GETIPTR:
2709 case SNDCTL_DSP_GETOPTR:
2710 return snd_pcm_oss_get_ptr(pcm_oss_file,
2711 cmd == SNDCTL_DSP_GETIPTR ?
2712 SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK,
2713 (struct count_info __user *) arg);
2714 case SNDCTL_DSP_MAPINBUF:
2715 case SNDCTL_DSP_MAPOUTBUF:
2716 return snd_pcm_oss_get_mapbuf(pcm_oss_file,
2717 cmd == SNDCTL_DSP_MAPINBUF ?
2718 SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK,
2719 (struct buffmem_desc __user *) arg);
2720 case SNDCTL_DSP_SETSYNCRO:
2721 /* stop DMA now.. */
2723 case SNDCTL_DSP_SETDUPLEX:
2724 if (snd_pcm_oss_get_caps(pcm_oss_file) & DSP_CAP_DUPLEX)
2727 case SNDCTL_DSP_GETODELAY:
2728 res = snd_pcm_oss_get_odelay(pcm_oss_file);
2730 /* it's for sure, some broken apps don't check for error codes */
2734 return put_user(res, p);
2735 case SNDCTL_DSP_PROFILE:
2736 return 0; /* silently ignore */
2738 pr_debug("pcm_oss: unknown command = 0x%x\n", cmd);
2743 #ifdef CONFIG_COMPAT
2744 /* all compatible */
2745 static long snd_pcm_oss_ioctl_compat(struct file *file, unsigned int cmd,
2748 return snd_pcm_oss_ioctl(file, cmd, (unsigned long)compat_ptr(arg));
2751 #define snd_pcm_oss_ioctl_compat NULL
2754 static ssize_t snd_pcm_oss_read(struct file *file, char __user *buf, size_t count, loff_t *offset)
2756 struct snd_pcm_oss_file *pcm_oss_file;
2757 struct snd_pcm_substream *substream;
2759 pcm_oss_file = file->private_data;
2760 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
2761 if (substream == NULL)
2763 substream->f_flags = file->f_flags & O_NONBLOCK;
2765 return snd_pcm_oss_read1(substream, buf, count);
2768 ssize_t res = snd_pcm_oss_read1(substream, buf, count);
2769 pcm_dbg(substream->pcm,
2770 "pcm_oss: read %li bytes (returned %li bytes)\n",
2771 (long)count, (long)res);
2777 static ssize_t snd_pcm_oss_write(struct file *file, const char __user *buf, size_t count, loff_t *offset)
2779 struct snd_pcm_oss_file *pcm_oss_file;
2780 struct snd_pcm_substream *substream;
2783 pcm_oss_file = file->private_data;
2784 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
2785 if (substream == NULL)
2787 substream->f_flags = file->f_flags & O_NONBLOCK;
2788 result = snd_pcm_oss_write1(substream, buf, count);
2790 pcm_dbg(substream->pcm, "pcm_oss: write %li bytes (wrote %li bytes)\n",
2791 (long)count, (long)result);
2796 static int snd_pcm_oss_playback_ready(struct snd_pcm_substream *substream)
2798 struct snd_pcm_runtime *runtime = substream->runtime;
2799 if (atomic_read(&substream->mmap_count))
2800 return runtime->oss.prev_hw_ptr_period !=
2801 get_hw_ptr_period(runtime);
2803 return snd_pcm_playback_avail(runtime) >=
2804 runtime->oss.period_frames;
2807 static int snd_pcm_oss_capture_ready(struct snd_pcm_substream *substream)
2809 struct snd_pcm_runtime *runtime = substream->runtime;
2810 if (atomic_read(&substream->mmap_count))
2811 return runtime->oss.prev_hw_ptr_period !=
2812 get_hw_ptr_period(runtime);
2814 return snd_pcm_capture_avail(runtime) >=
2815 runtime->oss.period_frames;
2818 static __poll_t snd_pcm_oss_poll(struct file *file, poll_table * wait)
2820 struct snd_pcm_oss_file *pcm_oss_file;
2822 struct snd_pcm_substream *psubstream = NULL, *csubstream = NULL;
2824 pcm_oss_file = file->private_data;
2826 psubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
2827 csubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
2830 if (psubstream != NULL) {
2831 struct snd_pcm_runtime *runtime = psubstream->runtime;
2832 poll_wait(file, &runtime->sleep, wait);
2833 snd_pcm_stream_lock_irq(psubstream);
2834 if (runtime->status->state != SNDRV_PCM_STATE_DRAINING &&
2835 (runtime->status->state != SNDRV_PCM_STATE_RUNNING ||
2836 snd_pcm_oss_playback_ready(psubstream)))
2837 mask |= EPOLLOUT | EPOLLWRNORM;
2838 snd_pcm_stream_unlock_irq(psubstream);
2840 if (csubstream != NULL) {
2841 struct snd_pcm_runtime *runtime = csubstream->runtime;
2842 snd_pcm_state_t ostate;
2843 poll_wait(file, &runtime->sleep, wait);
2844 snd_pcm_stream_lock_irq(csubstream);
2845 if ((ostate = runtime->status->state) != SNDRV_PCM_STATE_RUNNING ||
2846 snd_pcm_oss_capture_ready(csubstream))
2847 mask |= EPOLLIN | EPOLLRDNORM;
2848 snd_pcm_stream_unlock_irq(csubstream);
2849 if (ostate != SNDRV_PCM_STATE_RUNNING && runtime->oss.trigger) {
2850 struct snd_pcm_oss_file ofile;
2851 memset(&ofile, 0, sizeof(ofile));
2852 ofile.streams[SNDRV_PCM_STREAM_CAPTURE] = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
2853 runtime->oss.trigger = 0;
2854 snd_pcm_oss_set_trigger(&ofile, PCM_ENABLE_INPUT);
2861 static int snd_pcm_oss_mmap(struct file *file, struct vm_area_struct *area)
2863 struct snd_pcm_oss_file *pcm_oss_file;
2864 struct snd_pcm_substream *substream = NULL;
2865 struct snd_pcm_runtime *runtime;
2869 pr_debug("pcm_oss: mmap begin\n");
2871 pcm_oss_file = file->private_data;
2872 switch ((area->vm_flags & (VM_READ | VM_WRITE))) {
2873 case VM_READ | VM_WRITE:
2874 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
2879 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
2882 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
2887 /* set VM_READ access as well to fix memset() routines that do
2888 reads before writes (to improve performance) */
2889 area->vm_flags |= VM_READ;
2890 if (substream == NULL)
2892 runtime = substream->runtime;
2893 if (!(runtime->info & SNDRV_PCM_INFO_MMAP_VALID))
2895 if (runtime->info & SNDRV_PCM_INFO_INTERLEAVED)
2896 runtime->access = SNDRV_PCM_ACCESS_MMAP_INTERLEAVED;
2900 if (runtime->oss.params) {
2901 /* use mutex_trylock() for params_lock for avoiding a deadlock
2902 * between mmap_sem and params_lock taken by
2903 * copy_from/to_user() in snd_pcm_oss_write/read()
2905 err = snd_pcm_oss_change_params(substream, true);
2909 #ifdef CONFIG_SND_PCM_OSS_PLUGINS
2910 if (runtime->oss.plugin_first != NULL)
2914 if (area->vm_pgoff != 0)
2917 err = snd_pcm_mmap_data(substream, file, area);
2920 runtime->oss.mmap_bytes = area->vm_end - area->vm_start;
2921 runtime->silence_threshold = 0;
2922 runtime->silence_size = 0;
2924 pr_debug("pcm_oss: mmap ok, bytes = 0x%x\n",
2925 runtime->oss.mmap_bytes);
2927 /* In mmap mode we never stop */
2928 runtime->stop_threshold = runtime->boundary;
2933 #ifdef CONFIG_SND_VERBOSE_PROCFS
2938 static void snd_pcm_oss_proc_read(struct snd_info_entry *entry,
2939 struct snd_info_buffer *buffer)
2941 struct snd_pcm_str *pstr = entry->private_data;
2942 struct snd_pcm_oss_setup *setup = pstr->oss.setup_list;
2943 mutex_lock(&pstr->oss.setup_mutex);
2945 snd_iprintf(buffer, "%s %u %u%s%s%s%s%s%s\n",
2949 setup->disable ? " disable" : "",
2950 setup->direct ? " direct" : "",
2951 setup->block ? " block" : "",
2952 setup->nonblock ? " non-block" : "",
2953 setup->partialfrag ? " partial-frag" : "",
2954 setup->nosilence ? " no-silence" : "");
2955 setup = setup->next;
2957 mutex_unlock(&pstr->oss.setup_mutex);
2960 static void snd_pcm_oss_proc_free_setup_list(struct snd_pcm_str * pstr)
2962 struct snd_pcm_oss_setup *setup, *setupn;
2964 for (setup = pstr->oss.setup_list, pstr->oss.setup_list = NULL;
2965 setup; setup = setupn) {
2966 setupn = setup->next;
2967 kfree(setup->task_name);
2970 pstr->oss.setup_list = NULL;
2973 static void snd_pcm_oss_proc_write(struct snd_info_entry *entry,
2974 struct snd_info_buffer *buffer)
2976 struct snd_pcm_str *pstr = entry->private_data;
2977 char line[128], str[32], task_name[32];
2980 struct snd_pcm_oss_setup *setup, *setup1, template;
2982 while (!snd_info_get_line(buffer, line, sizeof(line))) {
2983 mutex_lock(&pstr->oss.setup_mutex);
2984 memset(&template, 0, sizeof(template));
2985 ptr = snd_info_get_str(task_name, line, sizeof(task_name));
2986 if (!strcmp(task_name, "clear") || !strcmp(task_name, "erase")) {
2987 snd_pcm_oss_proc_free_setup_list(pstr);
2988 mutex_unlock(&pstr->oss.setup_mutex);
2991 for (setup = pstr->oss.setup_list; setup; setup = setup->next) {
2992 if (!strcmp(setup->task_name, task_name)) {
2997 ptr = snd_info_get_str(str, ptr, sizeof(str));
2998 template.periods = simple_strtoul(str, NULL, 10);
2999 ptr = snd_info_get_str(str, ptr, sizeof(str));
3000 template.period_size = simple_strtoul(str, NULL, 10);
3001 for (idx1 = 31; idx1 >= 0; idx1--)
3002 if (template.period_size & (1 << idx1))
3004 for (idx1--; idx1 >= 0; idx1--)
3005 template.period_size &= ~(1 << idx1);
3007 ptr = snd_info_get_str(str, ptr, sizeof(str));
3008 if (!strcmp(str, "disable")) {
3009 template.disable = 1;
3010 } else if (!strcmp(str, "direct")) {
3011 template.direct = 1;
3012 } else if (!strcmp(str, "block")) {
3014 } else if (!strcmp(str, "non-block")) {
3015 template.nonblock = 1;
3016 } else if (!strcmp(str, "partial-frag")) {
3017 template.partialfrag = 1;
3018 } else if (!strcmp(str, "no-silence")) {
3019 template.nosilence = 1;
3020 } else if (!strcmp(str, "buggy-ptr")) {
3021 template.buggyptr = 1;
3024 if (setup == NULL) {
3025 setup = kmalloc(sizeof(*setup), GFP_KERNEL);
3027 buffer->error = -ENOMEM;
3028 mutex_unlock(&pstr->oss.setup_mutex);
3031 if (pstr->oss.setup_list == NULL)
3032 pstr->oss.setup_list = setup;
3034 for (setup1 = pstr->oss.setup_list;
3035 setup1->next; setup1 = setup1->next);
3036 setup1->next = setup;
3038 template.task_name = kstrdup(task_name, GFP_KERNEL);
3039 if (! template.task_name) {
3041 buffer->error = -ENOMEM;
3042 mutex_unlock(&pstr->oss.setup_mutex);
3047 mutex_unlock(&pstr->oss.setup_mutex);
3051 static void snd_pcm_oss_proc_init(struct snd_pcm *pcm)
3054 for (stream = 0; stream < 2; ++stream) {
3055 struct snd_info_entry *entry;
3056 struct snd_pcm_str *pstr = &pcm->streams[stream];
3057 if (pstr->substream_count == 0)
3059 if ((entry = snd_info_create_card_entry(pcm->card, "oss", pstr->proc_root)) != NULL) {
3060 entry->content = SNDRV_INFO_CONTENT_TEXT;
3061 entry->mode = S_IFREG | 0644;
3062 entry->c.text.read = snd_pcm_oss_proc_read;
3063 entry->c.text.write = snd_pcm_oss_proc_write;
3064 entry->private_data = pstr;
3065 if (snd_info_register(entry) < 0) {
3066 snd_info_free_entry(entry);
3070 pstr->oss.proc_entry = entry;
3074 static void snd_pcm_oss_proc_done(struct snd_pcm *pcm)
3077 for (stream = 0; stream < 2; ++stream) {
3078 struct snd_pcm_str *pstr = &pcm->streams[stream];
3079 snd_info_free_entry(pstr->oss.proc_entry);
3080 pstr->oss.proc_entry = NULL;
3081 snd_pcm_oss_proc_free_setup_list(pstr);
3084 #else /* !CONFIG_SND_VERBOSE_PROCFS */
3085 #define snd_pcm_oss_proc_init(pcm)
3086 #define snd_pcm_oss_proc_done(pcm)
3087 #endif /* CONFIG_SND_VERBOSE_PROCFS */
3093 static const struct file_operations snd_pcm_oss_f_reg =
3095 .owner = THIS_MODULE,
3096 .read = snd_pcm_oss_read,
3097 .write = snd_pcm_oss_write,
3098 .open = snd_pcm_oss_open,
3099 .release = snd_pcm_oss_release,
3100 .llseek = no_llseek,
3101 .poll = snd_pcm_oss_poll,
3102 .unlocked_ioctl = snd_pcm_oss_ioctl,
3103 .compat_ioctl = snd_pcm_oss_ioctl_compat,
3104 .mmap = snd_pcm_oss_mmap,
3107 static void register_oss_dsp(struct snd_pcm *pcm, int index)
3109 if (snd_register_oss_device(SNDRV_OSS_DEVICE_TYPE_PCM,
3110 pcm->card, index, &snd_pcm_oss_f_reg,
3112 pcm_err(pcm, "unable to register OSS PCM device %i:%i\n",
3113 pcm->card->number, pcm->device);
3117 static int snd_pcm_oss_register_minor(struct snd_pcm *pcm)
3120 if (dsp_map[pcm->card->number] == (int)pcm->device) {
3123 register_oss_dsp(pcm, 0);
3124 duplex = (pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream_count > 0 &&
3125 pcm->streams[SNDRV_PCM_STREAM_CAPTURE].substream_count &&
3126 !(pcm->info_flags & SNDRV_PCM_INFO_HALF_DUPLEX));
3127 sprintf(name, "%s%s", pcm->name, duplex ? " (DUPLEX)" : "");
3128 #ifdef SNDRV_OSS_INFO_DEV_AUDIO
3129 snd_oss_info_register(SNDRV_OSS_INFO_DEV_AUDIO,
3134 pcm->oss.reg_mask |= 1;
3136 if (adsp_map[pcm->card->number] == (int)pcm->device) {
3137 register_oss_dsp(pcm, 1);
3139 pcm->oss.reg_mask |= 2;
3143 snd_pcm_oss_proc_init(pcm);
3148 static int snd_pcm_oss_disconnect_minor(struct snd_pcm *pcm)
3151 if (pcm->oss.reg_mask & 1) {
3152 pcm->oss.reg_mask &= ~1;
3153 snd_unregister_oss_device(SNDRV_OSS_DEVICE_TYPE_PCM,
3156 if (pcm->oss.reg_mask & 2) {
3157 pcm->oss.reg_mask &= ~2;
3158 snd_unregister_oss_device(SNDRV_OSS_DEVICE_TYPE_PCM,
3161 if (dsp_map[pcm->card->number] == (int)pcm->device) {
3162 #ifdef SNDRV_OSS_INFO_DEV_AUDIO
3163 snd_oss_info_unregister(SNDRV_OSS_INFO_DEV_AUDIO, pcm->card->number);
3171 static int snd_pcm_oss_unregister_minor(struct snd_pcm *pcm)
3173 snd_pcm_oss_disconnect_minor(pcm);
3174 snd_pcm_oss_proc_done(pcm);
3178 static struct snd_pcm_notify snd_pcm_oss_notify =
3180 .n_register = snd_pcm_oss_register_minor,
3181 .n_disconnect = snd_pcm_oss_disconnect_minor,
3182 .n_unregister = snd_pcm_oss_unregister_minor,
3185 static int __init alsa_pcm_oss_init(void)
3190 /* check device map table */
3191 for (i = 0; i < SNDRV_CARDS; i++) {
3192 if (dsp_map[i] < 0 || dsp_map[i] >= SNDRV_PCM_DEVICES) {
3193 pr_err("ALSA: pcm_oss: invalid dsp_map[%d] = %d\n",
3197 if (adsp_map[i] < 0 || adsp_map[i] >= SNDRV_PCM_DEVICES) {
3198 pr_err("ALSA: pcm_oss: invalid adsp_map[%d] = %d\n",
3203 if ((err = snd_pcm_notify(&snd_pcm_oss_notify, 0)) < 0)
3208 static void __exit alsa_pcm_oss_exit(void)
3210 snd_pcm_notify(&snd_pcm_oss_notify, 1);
3213 module_init(alsa_pcm_oss_init)
3214 module_exit(alsa_pcm_oss_exit)