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 size_t oss_buffer_size, oss_period_size, oss_periods;
687 size_t min_period_size, max_period_size;
688 struct snd_pcm_runtime *runtime = substream->runtime;
689 size_t oss_frame_size;
691 oss_frame_size = snd_pcm_format_physical_width(params_format(oss_params)) *
692 params_channels(oss_params) / 8;
694 oss_buffer_size = snd_pcm_plug_client_size(substream,
695 snd_pcm_hw_param_value_max(slave_params, SNDRV_PCM_HW_PARAM_BUFFER_SIZE, NULL)) * oss_frame_size;
696 oss_buffer_size = rounddown_pow_of_two(oss_buffer_size);
697 if (atomic_read(&substream->mmap_count)) {
698 if (oss_buffer_size > runtime->oss.mmap_bytes)
699 oss_buffer_size = runtime->oss.mmap_bytes;
702 if (substream->oss.setup.period_size > 16)
703 oss_period_size = substream->oss.setup.period_size;
704 else if (runtime->oss.fragshift) {
705 oss_period_size = 1 << runtime->oss.fragshift;
706 if (oss_period_size > oss_buffer_size / 2)
707 oss_period_size = oss_buffer_size / 2;
710 size_t bytes_per_sec = params_rate(oss_params) * snd_pcm_format_physical_width(params_format(oss_params)) * params_channels(oss_params) / 8;
712 oss_period_size = oss_buffer_size;
714 oss_period_size /= 2;
715 } while (oss_period_size > bytes_per_sec);
716 if (runtime->oss.subdivision == 0) {
718 if (oss_period_size / sd > 4096)
720 if (oss_period_size / sd < 4096)
723 sd = runtime->oss.subdivision;
724 oss_period_size /= sd;
725 if (oss_period_size < 16)
726 oss_period_size = 16;
729 min_period_size = snd_pcm_plug_client_size(substream,
730 snd_pcm_hw_param_value_min(slave_params, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, NULL));
731 min_period_size *= oss_frame_size;
732 min_period_size = roundup_pow_of_two(min_period_size);
733 if (oss_period_size < min_period_size)
734 oss_period_size = min_period_size;
736 max_period_size = snd_pcm_plug_client_size(substream,
737 snd_pcm_hw_param_value_max(slave_params, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, NULL));
738 max_period_size *= oss_frame_size;
739 max_period_size = rounddown_pow_of_two(max_period_size);
740 if (oss_period_size > max_period_size)
741 oss_period_size = max_period_size;
743 oss_periods = oss_buffer_size / oss_period_size;
745 if (substream->oss.setup.periods > 1)
746 oss_periods = substream->oss.setup.periods;
748 s = snd_pcm_hw_param_value_max(slave_params, SNDRV_PCM_HW_PARAM_PERIODS, NULL);
749 if (runtime->oss.maxfrags && s > runtime->oss.maxfrags)
750 s = runtime->oss.maxfrags;
754 s = snd_pcm_hw_param_value_min(slave_params, SNDRV_PCM_HW_PARAM_PERIODS, NULL);
760 while (oss_period_size * oss_periods > oss_buffer_size)
761 oss_period_size /= 2;
763 if (oss_period_size < 16)
765 runtime->oss.period_bytes = oss_period_size;
766 runtime->oss.period_frames = 1;
767 runtime->oss.periods = oss_periods;
771 static int choose_rate(struct snd_pcm_substream *substream,
772 struct snd_pcm_hw_params *params, unsigned int best_rate)
774 const struct snd_interval *it;
775 struct snd_pcm_hw_params *save;
776 unsigned int rate, prev;
778 save = kmalloc(sizeof(*save), GFP_KERNEL);
782 it = hw_param_interval_c(save, SNDRV_PCM_HW_PARAM_RATE);
784 /* try multiples of the best rate */
787 if (it->max < rate || (it->max == rate && it->openmax))
789 if (it->min < rate || (it->min == rate && !it->openmin)) {
791 ret = snd_pcm_hw_param_set(substream, params,
792 SNDRV_PCM_HW_PARAM_RATE,
794 if (ret == (int)rate) {
806 /* not found, use the nearest rate */
808 return snd_pcm_hw_param_near(substream, params, SNDRV_PCM_HW_PARAM_RATE, best_rate, NULL);
811 /* parameter locking: returns immediately if tried during streaming */
812 static int lock_params(struct snd_pcm_runtime *runtime)
814 if (mutex_lock_interruptible(&runtime->oss.params_lock))
816 if (atomic_read(&runtime->oss.rw_ref)) {
817 mutex_unlock(&runtime->oss.params_lock);
823 static void unlock_params(struct snd_pcm_runtime *runtime)
825 mutex_unlock(&runtime->oss.params_lock);
828 /* call with params_lock held */
829 static int snd_pcm_oss_change_params_locked(struct snd_pcm_substream *substream)
831 struct snd_pcm_runtime *runtime = substream->runtime;
832 struct snd_pcm_hw_params *params, *sparams;
833 struct snd_pcm_sw_params *sw_params;
834 ssize_t oss_buffer_size, oss_period_size;
835 size_t oss_frame_size;
838 snd_pcm_format_t format, sformat;
840 const struct snd_mask *sformat_mask;
841 struct snd_mask mask;
843 if (!runtime->oss.params)
845 sw_params = kzalloc(sizeof(*sw_params), GFP_KERNEL);
846 params = kmalloc(sizeof(*params), GFP_KERNEL);
847 sparams = kmalloc(sizeof(*sparams), GFP_KERNEL);
848 if (!sw_params || !params || !sparams) {
853 if (atomic_read(&substream->mmap_count))
856 direct = substream->oss.setup.direct;
858 _snd_pcm_hw_params_any(sparams);
859 _snd_pcm_hw_param_setinteger(sparams, SNDRV_PCM_HW_PARAM_PERIODS);
860 _snd_pcm_hw_param_min(sparams, SNDRV_PCM_HW_PARAM_PERIODS, 2, 0);
861 snd_mask_none(&mask);
862 if (atomic_read(&substream->mmap_count))
863 snd_mask_set(&mask, (__force int)SNDRV_PCM_ACCESS_MMAP_INTERLEAVED);
865 snd_mask_set(&mask, (__force int)SNDRV_PCM_ACCESS_RW_INTERLEAVED);
867 snd_mask_set(&mask, (__force int)SNDRV_PCM_ACCESS_RW_NONINTERLEAVED);
869 err = snd_pcm_hw_param_mask(substream, sparams, SNDRV_PCM_HW_PARAM_ACCESS, &mask);
871 pcm_dbg(substream->pcm, "No usable accesses\n");
875 choose_rate(substream, sparams, runtime->oss.rate);
876 snd_pcm_hw_param_near(substream, sparams, SNDRV_PCM_HW_PARAM_CHANNELS, runtime->oss.channels, NULL);
878 format = snd_pcm_oss_format_from(runtime->oss.format);
880 sformat_mask = hw_param_mask_c(sparams, SNDRV_PCM_HW_PARAM_FORMAT);
884 sformat = snd_pcm_plug_slave_format(format, sformat_mask);
886 if ((__force int)sformat < 0 ||
887 !snd_mask_test(sformat_mask, (__force int)sformat)) {
888 for (sformat = (__force snd_pcm_format_t)0;
889 (__force int)sformat <= (__force int)SNDRV_PCM_FORMAT_LAST;
890 sformat = (__force snd_pcm_format_t)((__force int)sformat + 1)) {
891 if (snd_mask_test(sformat_mask, (__force int)sformat) &&
892 snd_pcm_oss_format_to(sformat) >= 0)
895 if ((__force int)sformat > (__force int)SNDRV_PCM_FORMAT_LAST) {
896 pcm_dbg(substream->pcm, "Cannot find a format!!!\n");
901 err = _snd_pcm_hw_param_set(sparams, SNDRV_PCM_HW_PARAM_FORMAT, (__force int)sformat, 0);
906 memcpy(params, sparams, sizeof(*params));
908 _snd_pcm_hw_params_any(params);
909 _snd_pcm_hw_param_set(params, SNDRV_PCM_HW_PARAM_ACCESS,
910 (__force int)SNDRV_PCM_ACCESS_RW_INTERLEAVED, 0);
911 _snd_pcm_hw_param_set(params, SNDRV_PCM_HW_PARAM_FORMAT,
912 (__force int)snd_pcm_oss_format_from(runtime->oss.format), 0);
913 _snd_pcm_hw_param_set(params, SNDRV_PCM_HW_PARAM_CHANNELS,
914 runtime->oss.channels, 0);
915 _snd_pcm_hw_param_set(params, SNDRV_PCM_HW_PARAM_RATE,
916 runtime->oss.rate, 0);
917 pdprintf("client: access = %i, format = %i, channels = %i, rate = %i\n",
918 params_access(params), params_format(params),
919 params_channels(params), params_rate(params));
921 pdprintf("slave: access = %i, format = %i, channels = %i, rate = %i\n",
922 params_access(sparams), params_format(sparams),
923 params_channels(sparams), params_rate(sparams));
925 oss_frame_size = snd_pcm_format_physical_width(params_format(params)) *
926 params_channels(params) / 8;
928 err = snd_pcm_oss_period_size(substream, params, sparams);
932 n = snd_pcm_plug_slave_size(substream, runtime->oss.period_bytes / oss_frame_size);
933 err = snd_pcm_hw_param_near(substream, sparams, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, n, NULL);
937 err = snd_pcm_hw_param_near(substream, sparams, SNDRV_PCM_HW_PARAM_PERIODS,
938 runtime->oss.periods, NULL);
942 snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DROP, NULL);
944 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_HW_PARAMS, sparams);
946 pcm_dbg(substream->pcm, "HW_PARAMS failed: %i\n", err);
950 #ifdef CONFIG_SND_PCM_OSS_PLUGINS
951 snd_pcm_oss_plugin_clear(substream);
953 /* add necessary plugins */
954 snd_pcm_oss_plugin_clear(substream);
955 if ((err = snd_pcm_plug_format_plugins(substream,
958 pcm_dbg(substream->pcm,
959 "snd_pcm_plug_format_plugins failed: %i\n", err);
960 snd_pcm_oss_plugin_clear(substream);
963 if (runtime->oss.plugin_first) {
964 struct snd_pcm_plugin *plugin;
965 if ((err = snd_pcm_plugin_build_io(substream, sparams, &plugin)) < 0) {
966 pcm_dbg(substream->pcm,
967 "snd_pcm_plugin_build_io failed: %i\n", err);
968 snd_pcm_oss_plugin_clear(substream);
971 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
972 err = snd_pcm_plugin_append(plugin);
974 err = snd_pcm_plugin_insert(plugin);
977 snd_pcm_oss_plugin_clear(substream);
984 if (runtime->oss.trigger) {
985 sw_params->start_threshold = 1;
987 sw_params->start_threshold = runtime->boundary;
989 if (atomic_read(&substream->mmap_count) ||
990 substream->stream == SNDRV_PCM_STREAM_CAPTURE)
991 sw_params->stop_threshold = runtime->boundary;
993 sw_params->stop_threshold = runtime->buffer_size;
994 sw_params->tstamp_mode = SNDRV_PCM_TSTAMP_NONE;
995 sw_params->period_step = 1;
996 sw_params->avail_min = substream->stream == SNDRV_PCM_STREAM_PLAYBACK ?
997 1 : runtime->period_size;
998 if (atomic_read(&substream->mmap_count) ||
999 substream->oss.setup.nosilence) {
1000 sw_params->silence_threshold = 0;
1001 sw_params->silence_size = 0;
1003 snd_pcm_uframes_t frames;
1004 frames = runtime->period_size + 16;
1005 if (frames > runtime->buffer_size)
1006 frames = runtime->buffer_size;
1007 sw_params->silence_threshold = frames;
1008 sw_params->silence_size = frames;
1011 if ((err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_SW_PARAMS, sw_params)) < 0) {
1012 pcm_dbg(substream->pcm, "SW_PARAMS failed: %i\n", err);
1016 runtime->oss.periods = params_periods(sparams);
1017 oss_period_size = snd_pcm_plug_client_size(substream, params_period_size(sparams));
1018 if (oss_period_size < 0) {
1022 #ifdef CONFIG_SND_PCM_OSS_PLUGINS
1023 if (runtime->oss.plugin_first) {
1024 err = snd_pcm_plug_alloc(substream, oss_period_size);
1029 oss_period_size *= oss_frame_size;
1031 oss_buffer_size = oss_period_size * runtime->oss.periods;
1032 if (oss_buffer_size < 0) {
1037 runtime->oss.period_bytes = oss_period_size;
1038 runtime->oss.buffer_bytes = oss_buffer_size;
1040 pdprintf("oss: period bytes = %i, buffer bytes = %i\n",
1041 runtime->oss.period_bytes,
1042 runtime->oss.buffer_bytes);
1043 pdprintf("slave: period_size = %i, buffer_size = %i\n",
1044 params_period_size(sparams),
1045 params_buffer_size(sparams));
1047 runtime->oss.format = snd_pcm_oss_format_to(params_format(params));
1048 runtime->oss.channels = params_channels(params);
1049 runtime->oss.rate = params_rate(params);
1051 kvfree(runtime->oss.buffer);
1052 runtime->oss.buffer = kvzalloc(runtime->oss.period_bytes, GFP_KERNEL);
1053 if (!runtime->oss.buffer) {
1058 runtime->oss.params = 0;
1059 runtime->oss.prepare = 1;
1060 runtime->oss.buffer_used = 0;
1061 if (runtime->dma_area)
1062 snd_pcm_format_set_silence(runtime->format, runtime->dma_area, bytes_to_samples(runtime, runtime->dma_bytes));
1064 runtime->oss.period_frames = snd_pcm_alsa_frames(substream, oss_period_size);
1074 /* this one takes the lock by itself */
1075 static int snd_pcm_oss_change_params(struct snd_pcm_substream *substream,
1078 struct snd_pcm_runtime *runtime = substream->runtime;
1082 if (!(mutex_trylock(&runtime->oss.params_lock)))
1084 } else if (mutex_lock_interruptible(&runtime->oss.params_lock))
1085 return -ERESTARTSYS;
1087 err = snd_pcm_oss_change_params_locked(substream);
1088 mutex_unlock(&runtime->oss.params_lock);
1092 static int snd_pcm_oss_get_active_substream(struct snd_pcm_oss_file *pcm_oss_file, struct snd_pcm_substream **r_substream)
1095 struct snd_pcm_substream *asubstream = NULL, *substream;
1097 for (idx = 0; idx < 2; idx++) {
1098 substream = pcm_oss_file->streams[idx];
1099 if (substream == NULL)
1101 if (asubstream == NULL)
1102 asubstream = substream;
1103 if (substream->runtime->oss.params) {
1104 err = snd_pcm_oss_change_params(substream, false);
1112 *r_substream = asubstream;
1116 /* call with params_lock held */
1117 /* NOTE: this always call PREPARE unconditionally no matter whether
1118 * runtime->oss.prepare is set or not
1120 static int snd_pcm_oss_prepare(struct snd_pcm_substream *substream)
1123 struct snd_pcm_runtime *runtime = substream->runtime;
1125 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_PREPARE, NULL);
1127 pcm_dbg(substream->pcm,
1128 "snd_pcm_oss_prepare: SNDRV_PCM_IOCTL_PREPARE failed\n");
1131 runtime->oss.prepare = 0;
1132 runtime->oss.prev_hw_ptr_period = 0;
1133 runtime->oss.period_ptr = 0;
1134 runtime->oss.buffer_used = 0;
1139 static int snd_pcm_oss_make_ready(struct snd_pcm_substream *substream)
1141 struct snd_pcm_runtime *runtime;
1144 runtime = substream->runtime;
1145 if (runtime->oss.params) {
1146 err = snd_pcm_oss_change_params(substream, false);
1150 if (runtime->oss.prepare) {
1151 if (mutex_lock_interruptible(&runtime->oss.params_lock))
1152 return -ERESTARTSYS;
1153 err = snd_pcm_oss_prepare(substream);
1154 mutex_unlock(&runtime->oss.params_lock);
1161 /* call with params_lock held */
1162 static int snd_pcm_oss_make_ready_locked(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_locked(substream);
1173 if (runtime->oss.prepare) {
1174 err = snd_pcm_oss_prepare(substream);
1181 static int snd_pcm_oss_capture_position_fixup(struct snd_pcm_substream *substream, snd_pcm_sframes_t *delay)
1183 struct snd_pcm_runtime *runtime;
1184 snd_pcm_uframes_t frames;
1188 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DELAY, delay);
1191 runtime = substream->runtime;
1192 if (*delay <= (snd_pcm_sframes_t)runtime->buffer_size)
1194 /* in case of overrun, skip whole periods like OSS/Linux driver does */
1195 /* until avail(delay) <= buffer_size */
1196 frames = (*delay - runtime->buffer_size) + runtime->period_size - 1;
1197 frames /= runtime->period_size;
1198 frames *= runtime->period_size;
1199 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_FORWARD, &frames);
1206 snd_pcm_sframes_t snd_pcm_oss_write3(struct snd_pcm_substream *substream, const char *ptr, snd_pcm_uframes_t frames, int in_kernel)
1208 struct snd_pcm_runtime *runtime = substream->runtime;
1211 if (runtime->status->state == SNDRV_PCM_STATE_XRUN ||
1212 runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) {
1214 pcm_dbg(substream->pcm,
1215 "pcm_oss: write: recovering from %s\n",
1216 runtime->status->state == SNDRV_PCM_STATE_XRUN ?
1217 "XRUN" : "SUSPEND");
1219 ret = snd_pcm_oss_prepare(substream);
1223 ret = __snd_pcm_lib_xfer(substream, (void *)ptr, true,
1225 if (ret != -EPIPE && ret != -ESTRPIPE)
1227 /* test, if we can't store new data, because the stream */
1228 /* has not been started */
1229 if (runtime->status->state == SNDRV_PCM_STATE_PREPARED)
1235 snd_pcm_sframes_t snd_pcm_oss_read3(struct snd_pcm_substream *substream, char *ptr, snd_pcm_uframes_t frames, int in_kernel)
1237 struct snd_pcm_runtime *runtime = substream->runtime;
1238 snd_pcm_sframes_t delay;
1241 if (runtime->status->state == SNDRV_PCM_STATE_XRUN ||
1242 runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) {
1244 pcm_dbg(substream->pcm,
1245 "pcm_oss: read: recovering from %s\n",
1246 runtime->status->state == SNDRV_PCM_STATE_XRUN ?
1247 "XRUN" : "SUSPEND");
1249 ret = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DRAIN, NULL);
1252 } else if (runtime->status->state == SNDRV_PCM_STATE_SETUP) {
1253 ret = snd_pcm_oss_prepare(substream);
1257 ret = snd_pcm_oss_capture_position_fixup(substream, &delay);
1260 ret = __snd_pcm_lib_xfer(substream, (void *)ptr, true,
1262 if (ret == -EPIPE) {
1263 if (runtime->status->state == SNDRV_PCM_STATE_DRAINING) {
1264 ret = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DROP, NULL);
1270 if (ret != -ESTRPIPE)
1276 #ifdef CONFIG_SND_PCM_OSS_PLUGINS
1277 snd_pcm_sframes_t snd_pcm_oss_writev3(struct snd_pcm_substream *substream, void **bufs, snd_pcm_uframes_t frames)
1279 struct snd_pcm_runtime *runtime = substream->runtime;
1282 if (runtime->status->state == SNDRV_PCM_STATE_XRUN ||
1283 runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) {
1285 pcm_dbg(substream->pcm,
1286 "pcm_oss: writev: recovering from %s\n",
1287 runtime->status->state == SNDRV_PCM_STATE_XRUN ?
1288 "XRUN" : "SUSPEND");
1290 ret = snd_pcm_oss_prepare(substream);
1294 ret = snd_pcm_kernel_writev(substream, bufs, frames);
1295 if (ret != -EPIPE && ret != -ESTRPIPE)
1298 /* test, if we can't store new data, because the stream */
1299 /* has not been started */
1300 if (runtime->status->state == SNDRV_PCM_STATE_PREPARED)
1306 snd_pcm_sframes_t snd_pcm_oss_readv3(struct snd_pcm_substream *substream, void **bufs, snd_pcm_uframes_t frames)
1308 struct snd_pcm_runtime *runtime = substream->runtime;
1311 if (runtime->status->state == SNDRV_PCM_STATE_XRUN ||
1312 runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) {
1314 pcm_dbg(substream->pcm,
1315 "pcm_oss: readv: recovering from %s\n",
1316 runtime->status->state == SNDRV_PCM_STATE_XRUN ?
1317 "XRUN" : "SUSPEND");
1319 ret = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DRAIN, NULL);
1322 } else if (runtime->status->state == SNDRV_PCM_STATE_SETUP) {
1323 ret = snd_pcm_oss_prepare(substream);
1327 ret = snd_pcm_kernel_readv(substream, bufs, frames);
1328 if (ret != -EPIPE && ret != -ESTRPIPE)
1333 #endif /* CONFIG_SND_PCM_OSS_PLUGINS */
1335 static ssize_t snd_pcm_oss_write2(struct snd_pcm_substream *substream, const char *buf, size_t bytes, int in_kernel)
1337 struct snd_pcm_runtime *runtime = substream->runtime;
1338 snd_pcm_sframes_t frames, frames1;
1339 #ifdef CONFIG_SND_PCM_OSS_PLUGINS
1340 if (runtime->oss.plugin_first) {
1341 struct snd_pcm_plugin_channel *channels;
1342 size_t oss_frame_bytes = (runtime->oss.plugin_first->src_width * runtime->oss.plugin_first->src_format.channels) / 8;
1344 if (copy_from_user(runtime->oss.buffer, (const char __force __user *)buf, bytes))
1346 buf = runtime->oss.buffer;
1348 frames = bytes / oss_frame_bytes;
1349 frames1 = snd_pcm_plug_client_channels_buf(substream, (char *)buf, frames, &channels);
1352 frames1 = snd_pcm_plug_write_transfer(substream, channels, frames1);
1355 bytes = frames1 * oss_frame_bytes;
1359 frames = bytes_to_frames(runtime, bytes);
1360 frames1 = snd_pcm_oss_write3(substream, buf, frames, in_kernel);
1363 bytes = frames_to_bytes(runtime, frames1);
1368 static ssize_t snd_pcm_oss_write1(struct snd_pcm_substream *substream, const char __user *buf, size_t bytes)
1372 struct snd_pcm_runtime *runtime = substream->runtime;
1374 if (atomic_read(&substream->mmap_count))
1377 atomic_inc(&runtime->oss.rw_ref);
1379 if (mutex_lock_interruptible(&runtime->oss.params_lock)) {
1383 tmp = snd_pcm_oss_make_ready_locked(substream);
1386 if (bytes < runtime->oss.period_bytes || runtime->oss.buffer_used > 0) {
1388 if (tmp + runtime->oss.buffer_used > runtime->oss.period_bytes)
1389 tmp = runtime->oss.period_bytes - runtime->oss.buffer_used;
1391 if (copy_from_user(runtime->oss.buffer + runtime->oss.buffer_used, buf, tmp)) {
1396 runtime->oss.buffer_used += tmp;
1400 if (substream->oss.setup.partialfrag ||
1401 runtime->oss.buffer_used == runtime->oss.period_bytes) {
1402 tmp = snd_pcm_oss_write2(substream, runtime->oss.buffer + runtime->oss.period_ptr,
1403 runtime->oss.buffer_used - runtime->oss.period_ptr, 1);
1406 runtime->oss.bytes += tmp;
1407 runtime->oss.period_ptr += tmp;
1408 runtime->oss.period_ptr %= runtime->oss.period_bytes;
1409 if (runtime->oss.period_ptr == 0 ||
1410 runtime->oss.period_ptr == runtime->oss.buffer_used)
1411 runtime->oss.buffer_used = 0;
1412 else if ((substream->f_flags & O_NONBLOCK) != 0) {
1418 tmp = snd_pcm_oss_write2(substream,
1419 (const char __force *)buf,
1420 runtime->oss.period_bytes, 0);
1423 runtime->oss.bytes += tmp;
1427 if ((substream->f_flags & O_NONBLOCK) != 0 &&
1428 tmp != runtime->oss.period_bytes)
1432 mutex_unlock(&runtime->oss.params_lock);
1435 if (signal_pending(current)) {
1441 atomic_dec(&runtime->oss.rw_ref);
1442 return xfer > 0 ? (snd_pcm_sframes_t)xfer : tmp;
1445 static ssize_t snd_pcm_oss_read2(struct snd_pcm_substream *substream, char *buf, size_t bytes, int in_kernel)
1447 struct snd_pcm_runtime *runtime = substream->runtime;
1448 snd_pcm_sframes_t frames, frames1;
1449 #ifdef CONFIG_SND_PCM_OSS_PLUGINS
1450 char __user *final_dst = (char __force __user *)buf;
1451 if (runtime->oss.plugin_first) {
1452 struct snd_pcm_plugin_channel *channels;
1453 size_t oss_frame_bytes = (runtime->oss.plugin_last->dst_width * runtime->oss.plugin_last->dst_format.channels) / 8;
1455 buf = runtime->oss.buffer;
1456 frames = bytes / oss_frame_bytes;
1457 frames1 = snd_pcm_plug_client_channels_buf(substream, buf, frames, &channels);
1460 frames1 = snd_pcm_plug_read_transfer(substream, channels, frames1);
1463 bytes = frames1 * oss_frame_bytes;
1464 if (!in_kernel && copy_to_user(final_dst, buf, bytes))
1469 frames = bytes_to_frames(runtime, bytes);
1470 frames1 = snd_pcm_oss_read3(substream, buf, frames, in_kernel);
1473 bytes = frames_to_bytes(runtime, frames1);
1478 static ssize_t snd_pcm_oss_read1(struct snd_pcm_substream *substream, char __user *buf, size_t bytes)
1482 struct snd_pcm_runtime *runtime = substream->runtime;
1484 if (atomic_read(&substream->mmap_count))
1487 atomic_inc(&runtime->oss.rw_ref);
1489 if (mutex_lock_interruptible(&runtime->oss.params_lock)) {
1493 tmp = snd_pcm_oss_make_ready_locked(substream);
1496 if (bytes < runtime->oss.period_bytes || runtime->oss.buffer_used > 0) {
1497 if (runtime->oss.buffer_used == 0) {
1498 tmp = snd_pcm_oss_read2(substream, runtime->oss.buffer, runtime->oss.period_bytes, 1);
1501 runtime->oss.bytes += tmp;
1502 runtime->oss.period_ptr = tmp;
1503 runtime->oss.buffer_used = tmp;
1506 if ((size_t) tmp > runtime->oss.buffer_used)
1507 tmp = runtime->oss.buffer_used;
1508 if (copy_to_user(buf, runtime->oss.buffer + (runtime->oss.period_ptr - runtime->oss.buffer_used), tmp)) {
1515 runtime->oss.buffer_used -= tmp;
1517 tmp = snd_pcm_oss_read2(substream, (char __force *)buf,
1518 runtime->oss.period_bytes, 0);
1521 runtime->oss.bytes += tmp;
1527 mutex_unlock(&runtime->oss.params_lock);
1530 if (signal_pending(current)) {
1536 atomic_dec(&runtime->oss.rw_ref);
1537 return xfer > 0 ? (snd_pcm_sframes_t)xfer : tmp;
1540 static int snd_pcm_oss_reset(struct snd_pcm_oss_file *pcm_oss_file)
1542 struct snd_pcm_substream *substream;
1543 struct snd_pcm_runtime *runtime;
1546 for (i = 0; i < 2; i++) {
1547 substream = pcm_oss_file->streams[i];
1550 runtime = substream->runtime;
1551 snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DROP, NULL);
1552 mutex_lock(&runtime->oss.params_lock);
1553 runtime->oss.prepare = 1;
1554 runtime->oss.buffer_used = 0;
1555 runtime->oss.prev_hw_ptr_period = 0;
1556 runtime->oss.period_ptr = 0;
1557 mutex_unlock(&runtime->oss.params_lock);
1562 static int snd_pcm_oss_post(struct snd_pcm_oss_file *pcm_oss_file)
1564 struct snd_pcm_substream *substream;
1567 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
1568 if (substream != NULL) {
1569 if ((err = snd_pcm_oss_make_ready(substream)) < 0)
1571 snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_START, NULL);
1573 /* note: all errors from the start action are ignored */
1574 /* OSS apps do not know, how to handle them */
1578 static int snd_pcm_oss_sync1(struct snd_pcm_substream *substream, size_t size)
1580 struct snd_pcm_runtime *runtime;
1582 snd_pcm_state_t state;
1584 wait_queue_entry_t wait;
1586 runtime = substream->runtime;
1587 init_waitqueue_entry(&wait, current);
1588 add_wait_queue(&runtime->sleep, &wait);
1590 pcm_dbg(substream->pcm, "sync1: size = %li\n", size);
1593 result = snd_pcm_oss_write2(substream, runtime->oss.buffer, size, 1);
1595 runtime->oss.buffer_used = 0;
1599 if (result != 0 && result != -EAGAIN)
1602 set_current_state(TASK_INTERRUPTIBLE);
1603 snd_pcm_stream_lock_irq(substream);
1604 state = runtime->status->state;
1605 snd_pcm_stream_unlock_irq(substream);
1606 if (state != SNDRV_PCM_STATE_RUNNING) {
1607 set_current_state(TASK_RUNNING);
1610 res = schedule_timeout(10 * HZ);
1611 if (signal_pending(current)) {
1612 result = -ERESTARTSYS;
1616 pcm_err(substream->pcm,
1617 "OSS sync error - DMA timeout\n");
1622 remove_wait_queue(&runtime->sleep, &wait);
1626 static int snd_pcm_oss_sync(struct snd_pcm_oss_file *pcm_oss_file)
1629 unsigned int saved_f_flags;
1630 struct snd_pcm_substream *substream;
1631 struct snd_pcm_runtime *runtime;
1632 snd_pcm_format_t format;
1633 unsigned long width;
1636 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
1637 if (substream != NULL) {
1638 runtime = substream->runtime;
1639 if (atomic_read(&substream->mmap_count))
1641 if ((err = snd_pcm_oss_make_ready(substream)) < 0)
1643 atomic_inc(&runtime->oss.rw_ref);
1644 if (mutex_lock_interruptible(&runtime->oss.params_lock)) {
1645 atomic_dec(&runtime->oss.rw_ref);
1646 return -ERESTARTSYS;
1648 format = snd_pcm_oss_format_from(runtime->oss.format);
1649 width = snd_pcm_format_physical_width(format);
1650 if (runtime->oss.buffer_used > 0) {
1652 pcm_dbg(substream->pcm, "sync: buffer_used\n");
1654 size = (8 * (runtime->oss.period_bytes - runtime->oss.buffer_used) + 7) / width;
1655 snd_pcm_format_set_silence(format,
1656 runtime->oss.buffer + runtime->oss.buffer_used,
1658 err = snd_pcm_oss_sync1(substream, runtime->oss.period_bytes);
1661 } else if (runtime->oss.period_ptr > 0) {
1663 pcm_dbg(substream->pcm, "sync: period_ptr\n");
1665 size = runtime->oss.period_bytes - runtime->oss.period_ptr;
1666 snd_pcm_format_set_silence(format,
1667 runtime->oss.buffer,
1669 err = snd_pcm_oss_sync1(substream, size);
1674 * The ALSA's period might be a bit large than OSS one.
1675 * Fill the remain portion of ALSA period with zeros.
1677 size = runtime->control->appl_ptr % runtime->period_size;
1679 size = runtime->period_size - size;
1680 if (runtime->access == SNDRV_PCM_ACCESS_RW_INTERLEAVED)
1681 snd_pcm_lib_write(substream, NULL, size);
1682 else if (runtime->access == SNDRV_PCM_ACCESS_RW_NONINTERLEAVED)
1683 snd_pcm_lib_writev(substream, NULL, size);
1686 mutex_unlock(&runtime->oss.params_lock);
1687 atomic_dec(&runtime->oss.rw_ref);
1691 * finish sync: drain the buffer
1694 saved_f_flags = substream->f_flags;
1695 substream->f_flags &= ~O_NONBLOCK;
1696 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DRAIN, NULL);
1697 substream->f_flags = saved_f_flags;
1700 mutex_lock(&runtime->oss.params_lock);
1701 runtime->oss.prepare = 1;
1702 mutex_unlock(&runtime->oss.params_lock);
1705 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
1706 if (substream != NULL) {
1707 if ((err = snd_pcm_oss_make_ready(substream)) < 0)
1709 runtime = substream->runtime;
1710 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DROP, NULL);
1713 mutex_lock(&runtime->oss.params_lock);
1714 runtime->oss.buffer_used = 0;
1715 runtime->oss.prepare = 1;
1716 mutex_unlock(&runtime->oss.params_lock);
1721 static int snd_pcm_oss_set_rate(struct snd_pcm_oss_file *pcm_oss_file, int rate)
1725 for (idx = 1; idx >= 0; --idx) {
1726 struct snd_pcm_substream *substream = pcm_oss_file->streams[idx];
1727 struct snd_pcm_runtime *runtime;
1730 if (substream == NULL)
1732 runtime = substream->runtime;
1735 else if (rate > 192000)
1737 err = lock_params(runtime);
1740 if (runtime->oss.rate != rate) {
1741 runtime->oss.params = 1;
1742 runtime->oss.rate = rate;
1744 unlock_params(runtime);
1746 return snd_pcm_oss_get_rate(pcm_oss_file);
1749 static int snd_pcm_oss_get_rate(struct snd_pcm_oss_file *pcm_oss_file)
1751 struct snd_pcm_substream *substream;
1754 if ((err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream)) < 0)
1756 return substream->runtime->oss.rate;
1759 static int snd_pcm_oss_set_channels(struct snd_pcm_oss_file *pcm_oss_file, unsigned int channels)
1766 for (idx = 1; idx >= 0; --idx) {
1767 struct snd_pcm_substream *substream = pcm_oss_file->streams[idx];
1768 struct snd_pcm_runtime *runtime;
1771 if (substream == NULL)
1773 runtime = substream->runtime;
1774 err = lock_params(runtime);
1777 if (runtime->oss.channels != channels) {
1778 runtime->oss.params = 1;
1779 runtime->oss.channels = channels;
1781 unlock_params(runtime);
1783 return snd_pcm_oss_get_channels(pcm_oss_file);
1786 static int snd_pcm_oss_get_channels(struct snd_pcm_oss_file *pcm_oss_file)
1788 struct snd_pcm_substream *substream;
1791 if ((err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream)) < 0)
1793 return substream->runtime->oss.channels;
1796 static int snd_pcm_oss_get_block_size(struct snd_pcm_oss_file *pcm_oss_file)
1798 struct snd_pcm_substream *substream;
1801 if ((err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream)) < 0)
1803 return substream->runtime->oss.period_bytes;
1806 static int snd_pcm_oss_get_formats(struct snd_pcm_oss_file *pcm_oss_file)
1808 struct snd_pcm_substream *substream;
1811 struct snd_pcm_hw_params *params;
1812 unsigned int formats = 0;
1813 const struct snd_mask *format_mask;
1816 if ((err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream)) < 0)
1818 if (atomic_read(&substream->mmap_count))
1821 direct = substream->oss.setup.direct;
1823 return AFMT_MU_LAW | AFMT_U8 |
1824 AFMT_S16_LE | AFMT_S16_BE |
1825 AFMT_S8 | AFMT_U16_LE |
1827 AFMT_S32_LE | AFMT_S32_BE |
1828 AFMT_S24_LE | AFMT_S24_BE |
1830 params = kmalloc(sizeof(*params), GFP_KERNEL);
1833 _snd_pcm_hw_params_any(params);
1834 err = snd_pcm_hw_refine(substream, params);
1837 format_mask = hw_param_mask_c(params, SNDRV_PCM_HW_PARAM_FORMAT);
1838 for (fmt = 0; fmt < 32; ++fmt) {
1839 if (snd_mask_test(format_mask, fmt)) {
1840 int f = snd_pcm_oss_format_to((__force snd_pcm_format_t)fmt);
1848 return err < 0 ? err : formats;
1851 static int snd_pcm_oss_set_format(struct snd_pcm_oss_file *pcm_oss_file, int format)
1856 if (format != AFMT_QUERY) {
1857 formats = snd_pcm_oss_get_formats(pcm_oss_file);
1860 if (!(formats & format))
1862 for (idx = 1; idx >= 0; --idx) {
1863 struct snd_pcm_substream *substream = pcm_oss_file->streams[idx];
1864 struct snd_pcm_runtime *runtime;
1865 if (substream == NULL)
1867 runtime = substream->runtime;
1868 err = lock_params(runtime);
1871 if (runtime->oss.format != format) {
1872 runtime->oss.params = 1;
1873 runtime->oss.format = format;
1875 unlock_params(runtime);
1878 return snd_pcm_oss_get_format(pcm_oss_file);
1881 static int snd_pcm_oss_get_format(struct snd_pcm_oss_file *pcm_oss_file)
1883 struct snd_pcm_substream *substream;
1886 if ((err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream)) < 0)
1888 return substream->runtime->oss.format;
1891 static int snd_pcm_oss_set_subdivide1(struct snd_pcm_substream *substream, int subdivide)
1893 struct snd_pcm_runtime *runtime;
1895 runtime = substream->runtime;
1896 if (subdivide == 0) {
1897 subdivide = runtime->oss.subdivision;
1902 if (runtime->oss.subdivision || runtime->oss.fragshift)
1904 if (subdivide != 1 && subdivide != 2 && subdivide != 4 &&
1905 subdivide != 8 && subdivide != 16)
1907 runtime->oss.subdivision = subdivide;
1908 runtime->oss.params = 1;
1912 static int snd_pcm_oss_set_subdivide(struct snd_pcm_oss_file *pcm_oss_file, int subdivide)
1914 int err = -EINVAL, idx;
1916 for (idx = 1; idx >= 0; --idx) {
1917 struct snd_pcm_substream *substream = pcm_oss_file->streams[idx];
1918 struct snd_pcm_runtime *runtime;
1920 if (substream == NULL)
1922 runtime = substream->runtime;
1923 err = lock_params(runtime);
1926 err = snd_pcm_oss_set_subdivide1(substream, subdivide);
1927 unlock_params(runtime);
1934 static int snd_pcm_oss_set_fragment1(struct snd_pcm_substream *substream, unsigned int val)
1936 struct snd_pcm_runtime *runtime;
1938 runtime = substream->runtime;
1939 if (runtime->oss.subdivision || runtime->oss.fragshift)
1941 runtime->oss.fragshift = val & 0xffff;
1942 runtime->oss.maxfrags = (val >> 16) & 0xffff;
1943 if (runtime->oss.fragshift < 4) /* < 16 */
1944 runtime->oss.fragshift = 4;
1945 if (runtime->oss.maxfrags < 2)
1946 runtime->oss.maxfrags = 2;
1947 runtime->oss.params = 1;
1951 static int snd_pcm_oss_set_fragment(struct snd_pcm_oss_file *pcm_oss_file, unsigned int val)
1953 int err = -EINVAL, idx;
1955 for (idx = 1; idx >= 0; --idx) {
1956 struct snd_pcm_substream *substream = pcm_oss_file->streams[idx];
1957 struct snd_pcm_runtime *runtime;
1959 if (substream == NULL)
1961 runtime = substream->runtime;
1962 err = lock_params(runtime);
1965 err = snd_pcm_oss_set_fragment1(substream, val);
1966 unlock_params(runtime);
1973 static int snd_pcm_oss_nonblock(struct file * file)
1975 spin_lock(&file->f_lock);
1976 file->f_flags |= O_NONBLOCK;
1977 spin_unlock(&file->f_lock);
1981 static int snd_pcm_oss_get_caps1(struct snd_pcm_substream *substream, int res)
1984 if (substream == NULL) {
1985 res &= ~DSP_CAP_DUPLEX;
1988 #ifdef DSP_CAP_MULTI
1989 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
1990 if (substream->pstr->substream_count > 1)
1991 res |= DSP_CAP_MULTI;
1993 /* DSP_CAP_REALTIME is set all times: */
1994 /* all ALSA drivers can return actual pointer in ring buffer */
1995 #if defined(DSP_CAP_REALTIME) && 0
1997 struct snd_pcm_runtime *runtime = substream->runtime;
1998 if (runtime->info & (SNDRV_PCM_INFO_BLOCK_TRANSFER|SNDRV_PCM_INFO_BATCH))
1999 res &= ~DSP_CAP_REALTIME;
2005 static int snd_pcm_oss_get_caps(struct snd_pcm_oss_file *pcm_oss_file)
2009 result = DSP_CAP_TRIGGER | DSP_CAP_MMAP | DSP_CAP_DUPLEX | DSP_CAP_REALTIME;
2010 for (idx = 0; idx < 2; idx++) {
2011 struct snd_pcm_substream *substream = pcm_oss_file->streams[idx];
2012 result = snd_pcm_oss_get_caps1(substream, result);
2014 result |= 0x0001; /* revision - same as SB AWE 64 */
2018 static void snd_pcm_oss_simulate_fill(struct snd_pcm_substream *substream,
2019 snd_pcm_uframes_t hw_ptr)
2021 struct snd_pcm_runtime *runtime = substream->runtime;
2022 snd_pcm_uframes_t appl_ptr;
2023 appl_ptr = hw_ptr + runtime->buffer_size;
2024 appl_ptr %= runtime->boundary;
2025 runtime->control->appl_ptr = appl_ptr;
2028 static int snd_pcm_oss_set_trigger(struct snd_pcm_oss_file *pcm_oss_file, int trigger)
2030 struct snd_pcm_runtime *runtime;
2031 struct snd_pcm_substream *psubstream = NULL, *csubstream = NULL;
2035 pcm_dbg(substream->pcm, "pcm_oss: trigger = 0x%x\n", trigger);
2038 psubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
2039 csubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
2042 if ((err = snd_pcm_oss_make_ready(psubstream)) < 0)
2046 if ((err = snd_pcm_oss_make_ready(csubstream)) < 0)
2050 runtime = psubstream->runtime;
2052 if (mutex_lock_interruptible(&runtime->oss.params_lock))
2053 return -ERESTARTSYS;
2054 if (trigger & PCM_ENABLE_OUTPUT) {
2055 if (runtime->oss.trigger)
2057 if (atomic_read(&psubstream->mmap_count))
2058 snd_pcm_oss_simulate_fill(psubstream,
2059 get_hw_ptr_period(runtime));
2060 runtime->oss.trigger = 1;
2061 runtime->start_threshold = 1;
2062 cmd = SNDRV_PCM_IOCTL_START;
2064 if (!runtime->oss.trigger)
2066 runtime->oss.trigger = 0;
2067 runtime->start_threshold = runtime->boundary;
2068 cmd = SNDRV_PCM_IOCTL_DROP;
2069 runtime->oss.prepare = 1;
2072 mutex_unlock(&runtime->oss.params_lock);
2074 err = snd_pcm_kernel_ioctl(psubstream, cmd, NULL);
2080 runtime = csubstream->runtime;
2082 if (mutex_lock_interruptible(&runtime->oss.params_lock))
2083 return -ERESTARTSYS;
2084 if (trigger & PCM_ENABLE_INPUT) {
2085 if (runtime->oss.trigger)
2087 runtime->oss.trigger = 1;
2088 runtime->start_threshold = 1;
2089 cmd = SNDRV_PCM_IOCTL_START;
2091 if (!runtime->oss.trigger)
2093 runtime->oss.trigger = 0;
2094 runtime->start_threshold = runtime->boundary;
2095 cmd = SNDRV_PCM_IOCTL_DROP;
2096 runtime->oss.prepare = 1;
2099 mutex_unlock(&runtime->oss.params_lock);
2101 err = snd_pcm_kernel_ioctl(csubstream, cmd, NULL);
2109 static int snd_pcm_oss_get_trigger(struct snd_pcm_oss_file *pcm_oss_file)
2111 struct snd_pcm_substream *psubstream = NULL, *csubstream = NULL;
2114 psubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
2115 csubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
2116 if (psubstream && psubstream->runtime && psubstream->runtime->oss.trigger)
2117 result |= PCM_ENABLE_OUTPUT;
2118 if (csubstream && csubstream->runtime && csubstream->runtime->oss.trigger)
2119 result |= PCM_ENABLE_INPUT;
2123 static int snd_pcm_oss_get_odelay(struct snd_pcm_oss_file *pcm_oss_file)
2125 struct snd_pcm_substream *substream;
2126 struct snd_pcm_runtime *runtime;
2127 snd_pcm_sframes_t delay;
2130 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
2131 if (substream == NULL)
2133 if ((err = snd_pcm_oss_make_ready(substream)) < 0)
2135 runtime = substream->runtime;
2136 if (runtime->oss.params || runtime->oss.prepare)
2138 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DELAY, &delay);
2140 delay = 0; /* hack for broken OSS applications */
2143 return snd_pcm_oss_bytes(substream, delay);
2146 static int snd_pcm_oss_get_ptr(struct snd_pcm_oss_file *pcm_oss_file, int stream, struct count_info __user * _info)
2148 struct snd_pcm_substream *substream;
2149 struct snd_pcm_runtime *runtime;
2150 snd_pcm_sframes_t delay;
2152 struct count_info info;
2157 substream = pcm_oss_file->streams[stream];
2158 if (substream == NULL)
2160 if ((err = snd_pcm_oss_make_ready(substream)) < 0)
2162 runtime = substream->runtime;
2163 if (runtime->oss.params || runtime->oss.prepare) {
2164 memset(&info, 0, sizeof(info));
2165 if (copy_to_user(_info, &info, sizeof(info)))
2169 if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
2170 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DELAY, &delay);
2171 if (err == -EPIPE || err == -ESTRPIPE || (! err && delay < 0)) {
2176 fixup = runtime->oss.buffer_used;
2179 err = snd_pcm_oss_capture_position_fixup(substream, &delay);
2180 fixup = -runtime->oss.buffer_used;
2184 info.ptr = snd_pcm_oss_bytes(substream, runtime->status->hw_ptr % runtime->buffer_size);
2185 if (atomic_read(&substream->mmap_count)) {
2186 snd_pcm_sframes_t n;
2187 delay = get_hw_ptr_period(runtime);
2188 n = delay - runtime->oss.prev_hw_ptr_period;
2190 n += runtime->boundary;
2191 info.blocks = n / runtime->period_size;
2192 runtime->oss.prev_hw_ptr_period = delay;
2193 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
2194 snd_pcm_oss_simulate_fill(substream, delay);
2195 info.bytes = snd_pcm_oss_bytes(substream, runtime->status->hw_ptr) & INT_MAX;
2197 delay = snd_pcm_oss_bytes(substream, delay);
2198 if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
2199 if (substream->oss.setup.buggyptr)
2200 info.blocks = (runtime->oss.buffer_bytes - delay - fixup) / runtime->oss.period_bytes;
2202 info.blocks = (delay + fixup) / runtime->oss.period_bytes;
2203 info.bytes = (runtime->oss.bytes - delay) & INT_MAX;
2206 info.blocks = delay / runtime->oss.period_bytes;
2207 info.bytes = (runtime->oss.bytes + delay) & INT_MAX;
2210 if (copy_to_user(_info, &info, sizeof(info)))
2215 static int snd_pcm_oss_get_space(struct snd_pcm_oss_file *pcm_oss_file, int stream, struct audio_buf_info __user *_info)
2217 struct snd_pcm_substream *substream;
2218 struct snd_pcm_runtime *runtime;
2219 snd_pcm_sframes_t avail;
2221 struct audio_buf_info info;
2226 substream = pcm_oss_file->streams[stream];
2227 if (substream == NULL)
2229 runtime = substream->runtime;
2231 if (runtime->oss.params &&
2232 (err = snd_pcm_oss_change_params(substream, false)) < 0)
2235 info.fragsize = runtime->oss.period_bytes;
2236 info.fragstotal = runtime->periods;
2237 if (runtime->oss.prepare) {
2238 if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
2239 info.bytes = runtime->oss.period_bytes * runtime->oss.periods;
2240 info.fragments = runtime->oss.periods;
2246 if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
2247 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DELAY, &avail);
2248 if (err == -EPIPE || err == -ESTRPIPE || (! err && avail < 0)) {
2249 avail = runtime->buffer_size;
2253 avail = runtime->buffer_size - avail;
2254 fixup = -runtime->oss.buffer_used;
2257 err = snd_pcm_oss_capture_position_fixup(substream, &avail);
2258 fixup = runtime->oss.buffer_used;
2262 info.bytes = snd_pcm_oss_bytes(substream, avail) + fixup;
2263 info.fragments = info.bytes / runtime->oss.period_bytes;
2267 pcm_dbg(substream->pcm,
2268 "pcm_oss: space: bytes = %i, fragments = %i, fragstotal = %i, fragsize = %i\n",
2269 info.bytes, info.fragments, info.fragstotal, info.fragsize);
2271 if (copy_to_user(_info, &info, sizeof(info)))
2276 static int snd_pcm_oss_get_mapbuf(struct snd_pcm_oss_file *pcm_oss_file, int stream, struct buffmem_desc __user * _info)
2278 // it won't be probably implemented
2279 // pr_debug("TODO: snd_pcm_oss_get_mapbuf\n");
2283 static const char *strip_task_path(const char *path)
2285 const char *ptr, *ptrl = NULL;
2286 for (ptr = path; *ptr; ptr++) {
2293 static void snd_pcm_oss_look_for_setup(struct snd_pcm *pcm, int stream,
2294 const char *task_name,
2295 struct snd_pcm_oss_setup *rsetup)
2297 struct snd_pcm_oss_setup *setup;
2299 mutex_lock(&pcm->streams[stream].oss.setup_mutex);
2301 for (setup = pcm->streams[stream].oss.setup_list; setup;
2302 setup = setup->next) {
2303 if (!strcmp(setup->task_name, task_name))
2306 } while ((task_name = strip_task_path(task_name)) != NULL);
2310 mutex_unlock(&pcm->streams[stream].oss.setup_mutex);
2313 static void snd_pcm_oss_release_substream(struct snd_pcm_substream *substream)
2315 struct snd_pcm_runtime *runtime;
2316 runtime = substream->runtime;
2317 kvfree(runtime->oss.buffer);
2318 runtime->oss.buffer = NULL;
2319 #ifdef CONFIG_SND_PCM_OSS_PLUGINS
2320 snd_pcm_oss_plugin_clear(substream);
2322 substream->oss.oss = 0;
2325 static void snd_pcm_oss_init_substream(struct snd_pcm_substream *substream,
2326 struct snd_pcm_oss_setup *setup,
2329 struct snd_pcm_runtime *runtime;
2331 substream->oss.oss = 1;
2332 substream->oss.setup = *setup;
2333 if (setup->nonblock)
2334 substream->f_flags |= O_NONBLOCK;
2335 else if (setup->block)
2336 substream->f_flags &= ~O_NONBLOCK;
2337 runtime = substream->runtime;
2338 runtime->oss.params = 1;
2339 runtime->oss.trigger = 1;
2340 runtime->oss.rate = 8000;
2341 mutex_init(&runtime->oss.params_lock);
2342 switch (SNDRV_MINOR_OSS_DEVICE(minor)) {
2343 case SNDRV_MINOR_OSS_PCM_8:
2344 runtime->oss.format = AFMT_U8;
2346 case SNDRV_MINOR_OSS_PCM_16:
2347 runtime->oss.format = AFMT_S16_LE;
2350 runtime->oss.format = AFMT_MU_LAW;
2352 runtime->oss.channels = 1;
2353 runtime->oss.fragshift = 0;
2354 runtime->oss.maxfrags = 0;
2355 runtime->oss.subdivision = 0;
2356 substream->pcm_release = snd_pcm_oss_release_substream;
2357 atomic_set(&runtime->oss.rw_ref, 0);
2360 static int snd_pcm_oss_release_file(struct snd_pcm_oss_file *pcm_oss_file)
2365 for (cidx = 0; cidx < 2; ++cidx) {
2366 struct snd_pcm_substream *substream = pcm_oss_file->streams[cidx];
2368 snd_pcm_release_substream(substream);
2370 kfree(pcm_oss_file);
2374 static int snd_pcm_oss_open_file(struct file *file,
2375 struct snd_pcm *pcm,
2376 struct snd_pcm_oss_file **rpcm_oss_file,
2378 struct snd_pcm_oss_setup *setup)
2381 struct snd_pcm_oss_file *pcm_oss_file;
2382 struct snd_pcm_substream *substream;
2383 fmode_t f_mode = file->f_mode;
2386 *rpcm_oss_file = NULL;
2388 pcm_oss_file = kzalloc(sizeof(*pcm_oss_file), GFP_KERNEL);
2389 if (pcm_oss_file == NULL)
2392 if ((f_mode & (FMODE_WRITE|FMODE_READ)) == (FMODE_WRITE|FMODE_READ) &&
2393 (pcm->info_flags & SNDRV_PCM_INFO_HALF_DUPLEX))
2394 f_mode = FMODE_WRITE;
2396 file->f_flags &= ~O_APPEND;
2397 for (idx = 0; idx < 2; idx++) {
2398 if (setup[idx].disable)
2400 if (! pcm->streams[idx].substream_count)
2401 continue; /* no matching substream */
2402 if (idx == SNDRV_PCM_STREAM_PLAYBACK) {
2403 if (! (f_mode & FMODE_WRITE))
2406 if (! (f_mode & FMODE_READ))
2409 err = snd_pcm_open_substream(pcm, idx, file, &substream);
2411 snd_pcm_oss_release_file(pcm_oss_file);
2415 pcm_oss_file->streams[idx] = substream;
2416 snd_pcm_oss_init_substream(substream, &setup[idx], minor);
2419 if (!pcm_oss_file->streams[0] && !pcm_oss_file->streams[1]) {
2420 snd_pcm_oss_release_file(pcm_oss_file);
2424 file->private_data = pcm_oss_file;
2426 *rpcm_oss_file = pcm_oss_file;
2431 static int snd_task_name(struct task_struct *task, char *name, size_t size)
2435 if (snd_BUG_ON(!task || !name || size < 2))
2437 for (idx = 0; idx < sizeof(task->comm) && idx + 1 < size; idx++)
2438 name[idx] = task->comm[idx];
2443 static int snd_pcm_oss_open(struct inode *inode, struct file *file)
2447 struct snd_pcm *pcm;
2448 struct snd_pcm_oss_file *pcm_oss_file;
2449 struct snd_pcm_oss_setup setup[2];
2451 wait_queue_entry_t wait;
2453 err = nonseekable_open(inode, file);
2457 pcm = snd_lookup_oss_minor_data(iminor(inode),
2458 SNDRV_OSS_DEVICE_TYPE_PCM);
2463 err = snd_card_file_add(pcm->card, file);
2466 if (!try_module_get(pcm->card->module)) {
2470 if (snd_task_name(current, task_name, sizeof(task_name)) < 0) {
2474 memset(setup, 0, sizeof(setup));
2475 if (file->f_mode & FMODE_WRITE)
2476 snd_pcm_oss_look_for_setup(pcm, SNDRV_PCM_STREAM_PLAYBACK,
2477 task_name, &setup[0]);
2478 if (file->f_mode & FMODE_READ)
2479 snd_pcm_oss_look_for_setup(pcm, SNDRV_PCM_STREAM_CAPTURE,
2480 task_name, &setup[1]);
2482 nonblock = !!(file->f_flags & O_NONBLOCK);
2484 nonblock = nonblock_open;
2486 init_waitqueue_entry(&wait, current);
2487 add_wait_queue(&pcm->open_wait, &wait);
2488 mutex_lock(&pcm->open_mutex);
2490 err = snd_pcm_oss_open_file(file, pcm, &pcm_oss_file,
2491 iminor(inode), setup);
2494 if (err == -EAGAIN) {
2501 set_current_state(TASK_INTERRUPTIBLE);
2502 mutex_unlock(&pcm->open_mutex);
2504 mutex_lock(&pcm->open_mutex);
2505 if (pcm->card->shutdown) {
2509 if (signal_pending(current)) {
2514 remove_wait_queue(&pcm->open_wait, &wait);
2515 mutex_unlock(&pcm->open_mutex);
2518 snd_card_unref(pcm->card);
2522 module_put(pcm->card->module);
2524 snd_card_file_remove(pcm->card, file);
2527 snd_card_unref(pcm->card);
2531 static int snd_pcm_oss_release(struct inode *inode, struct file *file)
2533 struct snd_pcm *pcm;
2534 struct snd_pcm_substream *substream;
2535 struct snd_pcm_oss_file *pcm_oss_file;
2537 pcm_oss_file = file->private_data;
2538 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
2539 if (substream == NULL)
2540 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
2541 if (snd_BUG_ON(!substream))
2543 pcm = substream->pcm;
2544 if (!pcm->card->shutdown)
2545 snd_pcm_oss_sync(pcm_oss_file);
2546 mutex_lock(&pcm->open_mutex);
2547 snd_pcm_oss_release_file(pcm_oss_file);
2548 mutex_unlock(&pcm->open_mutex);
2549 wake_up(&pcm->open_wait);
2550 module_put(pcm->card->module);
2551 snd_card_file_remove(pcm->card, file);
2555 static long snd_pcm_oss_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
2557 struct snd_pcm_oss_file *pcm_oss_file;
2558 int __user *p = (int __user *)arg;
2561 pcm_oss_file = file->private_data;
2562 if (cmd == OSS_GETVERSION)
2563 return put_user(SNDRV_OSS_VERSION, p);
2564 if (cmd == OSS_ALSAEMULVER)
2565 return put_user(1, p);
2566 #if IS_REACHABLE(CONFIG_SND_MIXER_OSS)
2567 if (((cmd >> 8) & 0xff) == 'M') { /* mixer ioctl - for OSS compatibility */
2568 struct snd_pcm_substream *substream;
2570 for (idx = 0; idx < 2; ++idx) {
2571 substream = pcm_oss_file->streams[idx];
2572 if (substream != NULL)
2575 if (snd_BUG_ON(idx >= 2))
2577 return snd_mixer_oss_ioctl_card(substream->pcm->card, cmd, arg);
2580 if (((cmd >> 8) & 0xff) != 'P')
2583 pr_debug("pcm_oss: ioctl = 0x%x\n", cmd);
2586 case SNDCTL_DSP_RESET:
2587 return snd_pcm_oss_reset(pcm_oss_file);
2588 case SNDCTL_DSP_SYNC:
2589 return snd_pcm_oss_sync(pcm_oss_file);
2590 case SNDCTL_DSP_SPEED:
2591 if (get_user(res, p))
2593 if ((res = snd_pcm_oss_set_rate(pcm_oss_file, res))<0)
2595 return put_user(res, p);
2596 case SOUND_PCM_READ_RATE:
2597 res = snd_pcm_oss_get_rate(pcm_oss_file);
2600 return put_user(res, p);
2601 case SNDCTL_DSP_STEREO:
2602 if (get_user(res, p))
2604 res = res > 0 ? 2 : 1;
2605 if ((res = snd_pcm_oss_set_channels(pcm_oss_file, res)) < 0)
2607 return put_user(--res, p);
2608 case SNDCTL_DSP_GETBLKSIZE:
2609 res = snd_pcm_oss_get_block_size(pcm_oss_file);
2612 return put_user(res, p);
2613 case SNDCTL_DSP_SETFMT:
2614 if (get_user(res, p))
2616 res = snd_pcm_oss_set_format(pcm_oss_file, res);
2619 return put_user(res, p);
2620 case SOUND_PCM_READ_BITS:
2621 res = snd_pcm_oss_get_format(pcm_oss_file);
2624 return put_user(res, p);
2625 case SNDCTL_DSP_CHANNELS:
2626 if (get_user(res, p))
2628 res = snd_pcm_oss_set_channels(pcm_oss_file, res);
2631 return put_user(res, p);
2632 case SOUND_PCM_READ_CHANNELS:
2633 res = snd_pcm_oss_get_channels(pcm_oss_file);
2636 return put_user(res, p);
2637 case SOUND_PCM_WRITE_FILTER:
2638 case SOUND_PCM_READ_FILTER:
2640 case SNDCTL_DSP_POST:
2641 return snd_pcm_oss_post(pcm_oss_file);
2642 case SNDCTL_DSP_SUBDIVIDE:
2643 if (get_user(res, p))
2645 res = snd_pcm_oss_set_subdivide(pcm_oss_file, res);
2648 return put_user(res, p);
2649 case SNDCTL_DSP_SETFRAGMENT:
2650 if (get_user(res, p))
2652 return snd_pcm_oss_set_fragment(pcm_oss_file, res);
2653 case SNDCTL_DSP_GETFMTS:
2654 res = snd_pcm_oss_get_formats(pcm_oss_file);
2657 return put_user(res, p);
2658 case SNDCTL_DSP_GETOSPACE:
2659 case SNDCTL_DSP_GETISPACE:
2660 return snd_pcm_oss_get_space(pcm_oss_file,
2661 cmd == SNDCTL_DSP_GETISPACE ?
2662 SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK,
2663 (struct audio_buf_info __user *) arg);
2664 case SNDCTL_DSP_NONBLOCK:
2665 return snd_pcm_oss_nonblock(file);
2666 case SNDCTL_DSP_GETCAPS:
2667 res = snd_pcm_oss_get_caps(pcm_oss_file);
2670 return put_user(res, p);
2671 case SNDCTL_DSP_GETTRIGGER:
2672 res = snd_pcm_oss_get_trigger(pcm_oss_file);
2675 return put_user(res, p);
2676 case SNDCTL_DSP_SETTRIGGER:
2677 if (get_user(res, p))
2679 return snd_pcm_oss_set_trigger(pcm_oss_file, res);
2680 case SNDCTL_DSP_GETIPTR:
2681 case SNDCTL_DSP_GETOPTR:
2682 return snd_pcm_oss_get_ptr(pcm_oss_file,
2683 cmd == SNDCTL_DSP_GETIPTR ?
2684 SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK,
2685 (struct count_info __user *) arg);
2686 case SNDCTL_DSP_MAPINBUF:
2687 case SNDCTL_DSP_MAPOUTBUF:
2688 return snd_pcm_oss_get_mapbuf(pcm_oss_file,
2689 cmd == SNDCTL_DSP_MAPINBUF ?
2690 SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK,
2691 (struct buffmem_desc __user *) arg);
2692 case SNDCTL_DSP_SETSYNCRO:
2693 /* stop DMA now.. */
2695 case SNDCTL_DSP_SETDUPLEX:
2696 if (snd_pcm_oss_get_caps(pcm_oss_file) & DSP_CAP_DUPLEX)
2699 case SNDCTL_DSP_GETODELAY:
2700 res = snd_pcm_oss_get_odelay(pcm_oss_file);
2702 /* it's for sure, some broken apps don't check for error codes */
2706 return put_user(res, p);
2707 case SNDCTL_DSP_PROFILE:
2708 return 0; /* silently ignore */
2710 pr_debug("pcm_oss: unknown command = 0x%x\n", cmd);
2715 #ifdef CONFIG_COMPAT
2716 /* all compatible */
2717 static long snd_pcm_oss_ioctl_compat(struct file *file, unsigned int cmd,
2720 return snd_pcm_oss_ioctl(file, cmd, (unsigned long)compat_ptr(arg));
2723 #define snd_pcm_oss_ioctl_compat NULL
2726 static ssize_t snd_pcm_oss_read(struct file *file, char __user *buf, size_t count, loff_t *offset)
2728 struct snd_pcm_oss_file *pcm_oss_file;
2729 struct snd_pcm_substream *substream;
2731 pcm_oss_file = file->private_data;
2732 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
2733 if (substream == NULL)
2735 substream->f_flags = file->f_flags & O_NONBLOCK;
2737 return snd_pcm_oss_read1(substream, buf, count);
2740 ssize_t res = snd_pcm_oss_read1(substream, buf, count);
2741 pcm_dbg(substream->pcm,
2742 "pcm_oss: read %li bytes (returned %li bytes)\n",
2743 (long)count, (long)res);
2749 static ssize_t snd_pcm_oss_write(struct file *file, const char __user *buf, size_t count, loff_t *offset)
2751 struct snd_pcm_oss_file *pcm_oss_file;
2752 struct snd_pcm_substream *substream;
2755 pcm_oss_file = file->private_data;
2756 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
2757 if (substream == NULL)
2759 substream->f_flags = file->f_flags & O_NONBLOCK;
2760 result = snd_pcm_oss_write1(substream, buf, count);
2762 pcm_dbg(substream->pcm, "pcm_oss: write %li bytes (wrote %li bytes)\n",
2763 (long)count, (long)result);
2768 static int snd_pcm_oss_playback_ready(struct snd_pcm_substream *substream)
2770 struct snd_pcm_runtime *runtime = substream->runtime;
2771 if (atomic_read(&substream->mmap_count))
2772 return runtime->oss.prev_hw_ptr_period !=
2773 get_hw_ptr_period(runtime);
2775 return snd_pcm_playback_avail(runtime) >=
2776 runtime->oss.period_frames;
2779 static int snd_pcm_oss_capture_ready(struct snd_pcm_substream *substream)
2781 struct snd_pcm_runtime *runtime = substream->runtime;
2782 if (atomic_read(&substream->mmap_count))
2783 return runtime->oss.prev_hw_ptr_period !=
2784 get_hw_ptr_period(runtime);
2786 return snd_pcm_capture_avail(runtime) >=
2787 runtime->oss.period_frames;
2790 static __poll_t snd_pcm_oss_poll(struct file *file, poll_table * wait)
2792 struct snd_pcm_oss_file *pcm_oss_file;
2794 struct snd_pcm_substream *psubstream = NULL, *csubstream = NULL;
2796 pcm_oss_file = file->private_data;
2798 psubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
2799 csubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
2802 if (psubstream != NULL) {
2803 struct snd_pcm_runtime *runtime = psubstream->runtime;
2804 poll_wait(file, &runtime->sleep, wait);
2805 snd_pcm_stream_lock_irq(psubstream);
2806 if (runtime->status->state != SNDRV_PCM_STATE_DRAINING &&
2807 (runtime->status->state != SNDRV_PCM_STATE_RUNNING ||
2808 snd_pcm_oss_playback_ready(psubstream)))
2809 mask |= EPOLLOUT | EPOLLWRNORM;
2810 snd_pcm_stream_unlock_irq(psubstream);
2812 if (csubstream != NULL) {
2813 struct snd_pcm_runtime *runtime = csubstream->runtime;
2814 snd_pcm_state_t ostate;
2815 poll_wait(file, &runtime->sleep, wait);
2816 snd_pcm_stream_lock_irq(csubstream);
2817 if ((ostate = runtime->status->state) != SNDRV_PCM_STATE_RUNNING ||
2818 snd_pcm_oss_capture_ready(csubstream))
2819 mask |= EPOLLIN | EPOLLRDNORM;
2820 snd_pcm_stream_unlock_irq(csubstream);
2821 if (ostate != SNDRV_PCM_STATE_RUNNING && runtime->oss.trigger) {
2822 struct snd_pcm_oss_file ofile;
2823 memset(&ofile, 0, sizeof(ofile));
2824 ofile.streams[SNDRV_PCM_STREAM_CAPTURE] = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
2825 runtime->oss.trigger = 0;
2826 snd_pcm_oss_set_trigger(&ofile, PCM_ENABLE_INPUT);
2833 static int snd_pcm_oss_mmap(struct file *file, struct vm_area_struct *area)
2835 struct snd_pcm_oss_file *pcm_oss_file;
2836 struct snd_pcm_substream *substream = NULL;
2837 struct snd_pcm_runtime *runtime;
2841 pr_debug("pcm_oss: mmap begin\n");
2843 pcm_oss_file = file->private_data;
2844 switch ((area->vm_flags & (VM_READ | VM_WRITE))) {
2845 case VM_READ | VM_WRITE:
2846 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
2851 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
2854 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
2859 /* set VM_READ access as well to fix memset() routines that do
2860 reads before writes (to improve performance) */
2861 area->vm_flags |= VM_READ;
2862 if (substream == NULL)
2864 runtime = substream->runtime;
2865 if (!(runtime->info & SNDRV_PCM_INFO_MMAP_VALID))
2867 if (runtime->info & SNDRV_PCM_INFO_INTERLEAVED)
2868 runtime->access = SNDRV_PCM_ACCESS_MMAP_INTERLEAVED;
2872 if (runtime->oss.params) {
2873 /* use mutex_trylock() for params_lock for avoiding a deadlock
2874 * between mmap_sem and params_lock taken by
2875 * copy_from/to_user() in snd_pcm_oss_write/read()
2877 err = snd_pcm_oss_change_params(substream, true);
2881 #ifdef CONFIG_SND_PCM_OSS_PLUGINS
2882 if (runtime->oss.plugin_first != NULL)
2886 if (area->vm_pgoff != 0)
2889 err = snd_pcm_mmap_data(substream, file, area);
2892 runtime->oss.mmap_bytes = area->vm_end - area->vm_start;
2893 runtime->silence_threshold = 0;
2894 runtime->silence_size = 0;
2896 pr_debug("pcm_oss: mmap ok, bytes = 0x%x\n",
2897 runtime->oss.mmap_bytes);
2899 /* In mmap mode we never stop */
2900 runtime->stop_threshold = runtime->boundary;
2905 #ifdef CONFIG_SND_VERBOSE_PROCFS
2910 static void snd_pcm_oss_proc_read(struct snd_info_entry *entry,
2911 struct snd_info_buffer *buffer)
2913 struct snd_pcm_str *pstr = entry->private_data;
2914 struct snd_pcm_oss_setup *setup = pstr->oss.setup_list;
2915 mutex_lock(&pstr->oss.setup_mutex);
2917 snd_iprintf(buffer, "%s %u %u%s%s%s%s%s%s\n",
2921 setup->disable ? " disable" : "",
2922 setup->direct ? " direct" : "",
2923 setup->block ? " block" : "",
2924 setup->nonblock ? " non-block" : "",
2925 setup->partialfrag ? " partial-frag" : "",
2926 setup->nosilence ? " no-silence" : "");
2927 setup = setup->next;
2929 mutex_unlock(&pstr->oss.setup_mutex);
2932 static void snd_pcm_oss_proc_free_setup_list(struct snd_pcm_str * pstr)
2934 struct snd_pcm_oss_setup *setup, *setupn;
2936 for (setup = pstr->oss.setup_list, pstr->oss.setup_list = NULL;
2937 setup; setup = setupn) {
2938 setupn = setup->next;
2939 kfree(setup->task_name);
2942 pstr->oss.setup_list = NULL;
2945 static void snd_pcm_oss_proc_write(struct snd_info_entry *entry,
2946 struct snd_info_buffer *buffer)
2948 struct snd_pcm_str *pstr = entry->private_data;
2949 char line[128], str[32], task_name[32];
2952 struct snd_pcm_oss_setup *setup, *setup1, template;
2954 while (!snd_info_get_line(buffer, line, sizeof(line))) {
2955 mutex_lock(&pstr->oss.setup_mutex);
2956 memset(&template, 0, sizeof(template));
2957 ptr = snd_info_get_str(task_name, line, sizeof(task_name));
2958 if (!strcmp(task_name, "clear") || !strcmp(task_name, "erase")) {
2959 snd_pcm_oss_proc_free_setup_list(pstr);
2960 mutex_unlock(&pstr->oss.setup_mutex);
2963 for (setup = pstr->oss.setup_list; setup; setup = setup->next) {
2964 if (!strcmp(setup->task_name, task_name)) {
2969 ptr = snd_info_get_str(str, ptr, sizeof(str));
2970 template.periods = simple_strtoul(str, NULL, 10);
2971 ptr = snd_info_get_str(str, ptr, sizeof(str));
2972 template.period_size = simple_strtoul(str, NULL, 10);
2973 for (idx1 = 31; idx1 >= 0; idx1--)
2974 if (template.period_size & (1 << idx1))
2976 for (idx1--; idx1 >= 0; idx1--)
2977 template.period_size &= ~(1 << idx1);
2979 ptr = snd_info_get_str(str, ptr, sizeof(str));
2980 if (!strcmp(str, "disable")) {
2981 template.disable = 1;
2982 } else if (!strcmp(str, "direct")) {
2983 template.direct = 1;
2984 } else if (!strcmp(str, "block")) {
2986 } else if (!strcmp(str, "non-block")) {
2987 template.nonblock = 1;
2988 } else if (!strcmp(str, "partial-frag")) {
2989 template.partialfrag = 1;
2990 } else if (!strcmp(str, "no-silence")) {
2991 template.nosilence = 1;
2992 } else if (!strcmp(str, "buggy-ptr")) {
2993 template.buggyptr = 1;
2996 if (setup == NULL) {
2997 setup = kmalloc(sizeof(*setup), GFP_KERNEL);
2999 buffer->error = -ENOMEM;
3000 mutex_unlock(&pstr->oss.setup_mutex);
3003 if (pstr->oss.setup_list == NULL)
3004 pstr->oss.setup_list = setup;
3006 for (setup1 = pstr->oss.setup_list;
3007 setup1->next; setup1 = setup1->next);
3008 setup1->next = setup;
3010 template.task_name = kstrdup(task_name, GFP_KERNEL);
3011 if (! template.task_name) {
3013 buffer->error = -ENOMEM;
3014 mutex_unlock(&pstr->oss.setup_mutex);
3019 mutex_unlock(&pstr->oss.setup_mutex);
3023 static void snd_pcm_oss_proc_init(struct snd_pcm *pcm)
3026 for (stream = 0; stream < 2; ++stream) {
3027 struct snd_info_entry *entry;
3028 struct snd_pcm_str *pstr = &pcm->streams[stream];
3029 if (pstr->substream_count == 0)
3031 if ((entry = snd_info_create_card_entry(pcm->card, "oss", pstr->proc_root)) != NULL) {
3032 entry->content = SNDRV_INFO_CONTENT_TEXT;
3033 entry->mode = S_IFREG | 0644;
3034 entry->c.text.read = snd_pcm_oss_proc_read;
3035 entry->c.text.write = snd_pcm_oss_proc_write;
3036 entry->private_data = pstr;
3037 if (snd_info_register(entry) < 0) {
3038 snd_info_free_entry(entry);
3042 pstr->oss.proc_entry = entry;
3046 static void snd_pcm_oss_proc_done(struct snd_pcm *pcm)
3049 for (stream = 0; stream < 2; ++stream) {
3050 struct snd_pcm_str *pstr = &pcm->streams[stream];
3051 snd_info_free_entry(pstr->oss.proc_entry);
3052 pstr->oss.proc_entry = NULL;
3053 snd_pcm_oss_proc_free_setup_list(pstr);
3056 #else /* !CONFIG_SND_VERBOSE_PROCFS */
3057 #define snd_pcm_oss_proc_init(pcm)
3058 #define snd_pcm_oss_proc_done(pcm)
3059 #endif /* CONFIG_SND_VERBOSE_PROCFS */
3065 static const struct file_operations snd_pcm_oss_f_reg =
3067 .owner = THIS_MODULE,
3068 .read = snd_pcm_oss_read,
3069 .write = snd_pcm_oss_write,
3070 .open = snd_pcm_oss_open,
3071 .release = snd_pcm_oss_release,
3072 .llseek = no_llseek,
3073 .poll = snd_pcm_oss_poll,
3074 .unlocked_ioctl = snd_pcm_oss_ioctl,
3075 .compat_ioctl = snd_pcm_oss_ioctl_compat,
3076 .mmap = snd_pcm_oss_mmap,
3079 static void register_oss_dsp(struct snd_pcm *pcm, int index)
3081 if (snd_register_oss_device(SNDRV_OSS_DEVICE_TYPE_PCM,
3082 pcm->card, index, &snd_pcm_oss_f_reg,
3084 pcm_err(pcm, "unable to register OSS PCM device %i:%i\n",
3085 pcm->card->number, pcm->device);
3089 static int snd_pcm_oss_register_minor(struct snd_pcm *pcm)
3092 if (dsp_map[pcm->card->number] == (int)pcm->device) {
3095 register_oss_dsp(pcm, 0);
3096 duplex = (pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream_count > 0 &&
3097 pcm->streams[SNDRV_PCM_STREAM_CAPTURE].substream_count &&
3098 !(pcm->info_flags & SNDRV_PCM_INFO_HALF_DUPLEX));
3099 sprintf(name, "%s%s", pcm->name, duplex ? " (DUPLEX)" : "");
3100 #ifdef SNDRV_OSS_INFO_DEV_AUDIO
3101 snd_oss_info_register(SNDRV_OSS_INFO_DEV_AUDIO,
3106 pcm->oss.reg_mask |= 1;
3108 if (adsp_map[pcm->card->number] == (int)pcm->device) {
3109 register_oss_dsp(pcm, 1);
3111 pcm->oss.reg_mask |= 2;
3115 snd_pcm_oss_proc_init(pcm);
3120 static int snd_pcm_oss_disconnect_minor(struct snd_pcm *pcm)
3123 if (pcm->oss.reg_mask & 1) {
3124 pcm->oss.reg_mask &= ~1;
3125 snd_unregister_oss_device(SNDRV_OSS_DEVICE_TYPE_PCM,
3128 if (pcm->oss.reg_mask & 2) {
3129 pcm->oss.reg_mask &= ~2;
3130 snd_unregister_oss_device(SNDRV_OSS_DEVICE_TYPE_PCM,
3133 if (dsp_map[pcm->card->number] == (int)pcm->device) {
3134 #ifdef SNDRV_OSS_INFO_DEV_AUDIO
3135 snd_oss_info_unregister(SNDRV_OSS_INFO_DEV_AUDIO, pcm->card->number);
3143 static int snd_pcm_oss_unregister_minor(struct snd_pcm *pcm)
3145 snd_pcm_oss_disconnect_minor(pcm);
3146 snd_pcm_oss_proc_done(pcm);
3150 static struct snd_pcm_notify snd_pcm_oss_notify =
3152 .n_register = snd_pcm_oss_register_minor,
3153 .n_disconnect = snd_pcm_oss_disconnect_minor,
3154 .n_unregister = snd_pcm_oss_unregister_minor,
3157 static int __init alsa_pcm_oss_init(void)
3162 /* check device map table */
3163 for (i = 0; i < SNDRV_CARDS; i++) {
3164 if (dsp_map[i] < 0 || dsp_map[i] >= SNDRV_PCM_DEVICES) {
3165 pr_err("ALSA: pcm_oss: invalid dsp_map[%d] = %d\n",
3169 if (adsp_map[i] < 0 || adsp_map[i] >= SNDRV_PCM_DEVICES) {
3170 pr_err("ALSA: pcm_oss: invalid adsp_map[%d] = %d\n",
3175 if ((err = snd_pcm_notify(&snd_pcm_oss_notify, 0)) < 0)
3180 static void __exit alsa_pcm_oss_exit(void)
3182 snd_pcm_notify(&snd_pcm_oss_notify, 1);
3185 module_init(alsa_pcm_oss_init)
3186 module_exit(alsa_pcm_oss_exit)