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_format(sformat_mask, sformat)) {
888 pcm_for_each_format(sformat) {
889 if (snd_mask_test_format(sformat_mask, sformat) &&
890 snd_pcm_oss_format_to(sformat) >= 0)
893 pcm_dbg(substream->pcm, "Cannot find a format!!!\n");
898 err = _snd_pcm_hw_param_set(sparams, SNDRV_PCM_HW_PARAM_FORMAT, (__force int)sformat, 0);
903 memcpy(params, sparams, sizeof(*params));
905 _snd_pcm_hw_params_any(params);
906 _snd_pcm_hw_param_set(params, SNDRV_PCM_HW_PARAM_ACCESS,
907 (__force int)SNDRV_PCM_ACCESS_RW_INTERLEAVED, 0);
908 _snd_pcm_hw_param_set(params, SNDRV_PCM_HW_PARAM_FORMAT,
909 (__force int)snd_pcm_oss_format_from(runtime->oss.format), 0);
910 _snd_pcm_hw_param_set(params, SNDRV_PCM_HW_PARAM_CHANNELS,
911 runtime->oss.channels, 0);
912 _snd_pcm_hw_param_set(params, SNDRV_PCM_HW_PARAM_RATE,
913 runtime->oss.rate, 0);
914 pdprintf("client: access = %i, format = %i, channels = %i, rate = %i\n",
915 params_access(params), params_format(params),
916 params_channels(params), params_rate(params));
918 pdprintf("slave: access = %i, format = %i, channels = %i, rate = %i\n",
919 params_access(sparams), params_format(sparams),
920 params_channels(sparams), params_rate(sparams));
922 oss_frame_size = snd_pcm_format_physical_width(params_format(params)) *
923 params_channels(params) / 8;
925 err = snd_pcm_oss_period_size(substream, params, sparams);
929 n = snd_pcm_plug_slave_size(substream, runtime->oss.period_bytes / oss_frame_size);
930 err = snd_pcm_hw_param_near(substream, sparams, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, n, NULL);
934 err = snd_pcm_hw_param_near(substream, sparams, SNDRV_PCM_HW_PARAM_PERIODS,
935 runtime->oss.periods, NULL);
939 snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DROP, NULL);
941 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_HW_PARAMS, sparams);
943 pcm_dbg(substream->pcm, "HW_PARAMS failed: %i\n", err);
947 #ifdef CONFIG_SND_PCM_OSS_PLUGINS
948 snd_pcm_oss_plugin_clear(substream);
950 /* add necessary plugins */
951 snd_pcm_oss_plugin_clear(substream);
952 if ((err = snd_pcm_plug_format_plugins(substream,
955 pcm_dbg(substream->pcm,
956 "snd_pcm_plug_format_plugins failed: %i\n", err);
957 snd_pcm_oss_plugin_clear(substream);
960 if (runtime->oss.plugin_first) {
961 struct snd_pcm_plugin *plugin;
962 if ((err = snd_pcm_plugin_build_io(substream, sparams, &plugin)) < 0) {
963 pcm_dbg(substream->pcm,
964 "snd_pcm_plugin_build_io failed: %i\n", err);
965 snd_pcm_oss_plugin_clear(substream);
968 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
969 err = snd_pcm_plugin_append(plugin);
971 err = snd_pcm_plugin_insert(plugin);
974 snd_pcm_oss_plugin_clear(substream);
981 if (runtime->oss.trigger) {
982 sw_params->start_threshold = 1;
984 sw_params->start_threshold = runtime->boundary;
986 if (atomic_read(&substream->mmap_count) ||
987 substream->stream == SNDRV_PCM_STREAM_CAPTURE)
988 sw_params->stop_threshold = runtime->boundary;
990 sw_params->stop_threshold = runtime->buffer_size;
991 sw_params->tstamp_mode = SNDRV_PCM_TSTAMP_NONE;
992 sw_params->period_step = 1;
993 sw_params->avail_min = substream->stream == SNDRV_PCM_STREAM_PLAYBACK ?
994 1 : runtime->period_size;
995 if (atomic_read(&substream->mmap_count) ||
996 substream->oss.setup.nosilence) {
997 sw_params->silence_threshold = 0;
998 sw_params->silence_size = 0;
1000 snd_pcm_uframes_t frames;
1001 frames = runtime->period_size + 16;
1002 if (frames > runtime->buffer_size)
1003 frames = runtime->buffer_size;
1004 sw_params->silence_threshold = frames;
1005 sw_params->silence_size = frames;
1008 if ((err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_SW_PARAMS, sw_params)) < 0) {
1009 pcm_dbg(substream->pcm, "SW_PARAMS failed: %i\n", err);
1013 runtime->oss.periods = params_periods(sparams);
1014 oss_period_size = snd_pcm_plug_client_size(substream, params_period_size(sparams));
1015 if (oss_period_size < 0) {
1019 #ifdef CONFIG_SND_PCM_OSS_PLUGINS
1020 if (runtime->oss.plugin_first) {
1021 err = snd_pcm_plug_alloc(substream, oss_period_size);
1026 oss_period_size *= oss_frame_size;
1028 oss_buffer_size = oss_period_size * runtime->oss.periods;
1029 if (oss_buffer_size < 0) {
1034 runtime->oss.period_bytes = oss_period_size;
1035 runtime->oss.buffer_bytes = oss_buffer_size;
1037 pdprintf("oss: period bytes = %i, buffer bytes = %i\n",
1038 runtime->oss.period_bytes,
1039 runtime->oss.buffer_bytes);
1040 pdprintf("slave: period_size = %i, buffer_size = %i\n",
1041 params_period_size(sparams),
1042 params_buffer_size(sparams));
1044 runtime->oss.format = snd_pcm_oss_format_to(params_format(params));
1045 runtime->oss.channels = params_channels(params);
1046 runtime->oss.rate = params_rate(params);
1048 kvfree(runtime->oss.buffer);
1049 runtime->oss.buffer = kvzalloc(runtime->oss.period_bytes, GFP_KERNEL);
1050 if (!runtime->oss.buffer) {
1055 runtime->oss.params = 0;
1056 runtime->oss.prepare = 1;
1057 runtime->oss.buffer_used = 0;
1058 if (runtime->dma_area)
1059 snd_pcm_format_set_silence(runtime->format, runtime->dma_area, bytes_to_samples(runtime, runtime->dma_bytes));
1061 runtime->oss.period_frames = snd_pcm_alsa_frames(substream, oss_period_size);
1071 /* this one takes the lock by itself */
1072 static int snd_pcm_oss_change_params(struct snd_pcm_substream *substream,
1075 struct snd_pcm_runtime *runtime = substream->runtime;
1079 if (!(mutex_trylock(&runtime->oss.params_lock)))
1081 } else if (mutex_lock_interruptible(&runtime->oss.params_lock))
1082 return -ERESTARTSYS;
1084 err = snd_pcm_oss_change_params_locked(substream);
1085 mutex_unlock(&runtime->oss.params_lock);
1089 static int snd_pcm_oss_get_active_substream(struct snd_pcm_oss_file *pcm_oss_file, struct snd_pcm_substream **r_substream)
1092 struct snd_pcm_substream *asubstream = NULL, *substream;
1094 for (idx = 0; idx < 2; idx++) {
1095 substream = pcm_oss_file->streams[idx];
1096 if (substream == NULL)
1098 if (asubstream == NULL)
1099 asubstream = substream;
1100 if (substream->runtime->oss.params) {
1101 err = snd_pcm_oss_change_params(substream, false);
1109 *r_substream = asubstream;
1113 /* call with params_lock held */
1114 /* NOTE: this always call PREPARE unconditionally no matter whether
1115 * runtime->oss.prepare is set or not
1117 static int snd_pcm_oss_prepare(struct snd_pcm_substream *substream)
1120 struct snd_pcm_runtime *runtime = substream->runtime;
1122 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_PREPARE, NULL);
1124 pcm_dbg(substream->pcm,
1125 "snd_pcm_oss_prepare: SNDRV_PCM_IOCTL_PREPARE failed\n");
1128 runtime->oss.prepare = 0;
1129 runtime->oss.prev_hw_ptr_period = 0;
1130 runtime->oss.period_ptr = 0;
1131 runtime->oss.buffer_used = 0;
1136 static int snd_pcm_oss_make_ready(struct snd_pcm_substream *substream)
1138 struct snd_pcm_runtime *runtime;
1141 runtime = substream->runtime;
1142 if (runtime->oss.params) {
1143 err = snd_pcm_oss_change_params(substream, false);
1147 if (runtime->oss.prepare) {
1148 if (mutex_lock_interruptible(&runtime->oss.params_lock))
1149 return -ERESTARTSYS;
1150 err = snd_pcm_oss_prepare(substream);
1151 mutex_unlock(&runtime->oss.params_lock);
1158 /* call with params_lock held */
1159 static int snd_pcm_oss_make_ready_locked(struct snd_pcm_substream *substream)
1161 struct snd_pcm_runtime *runtime;
1164 runtime = substream->runtime;
1165 if (runtime->oss.params) {
1166 err = snd_pcm_oss_change_params_locked(substream);
1170 if (runtime->oss.prepare) {
1171 err = snd_pcm_oss_prepare(substream);
1178 static int snd_pcm_oss_capture_position_fixup(struct snd_pcm_substream *substream, snd_pcm_sframes_t *delay)
1180 struct snd_pcm_runtime *runtime;
1181 snd_pcm_uframes_t frames;
1185 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DELAY, delay);
1188 runtime = substream->runtime;
1189 if (*delay <= (snd_pcm_sframes_t)runtime->buffer_size)
1191 /* in case of overrun, skip whole periods like OSS/Linux driver does */
1192 /* until avail(delay) <= buffer_size */
1193 frames = (*delay - runtime->buffer_size) + runtime->period_size - 1;
1194 frames /= runtime->period_size;
1195 frames *= runtime->period_size;
1196 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_FORWARD, &frames);
1203 snd_pcm_sframes_t snd_pcm_oss_write3(struct snd_pcm_substream *substream, const char *ptr, snd_pcm_uframes_t frames, int in_kernel)
1205 struct snd_pcm_runtime *runtime = substream->runtime;
1208 if (runtime->status->state == SNDRV_PCM_STATE_XRUN ||
1209 runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) {
1211 pcm_dbg(substream->pcm,
1212 "pcm_oss: write: recovering from %s\n",
1213 runtime->status->state == SNDRV_PCM_STATE_XRUN ?
1214 "XRUN" : "SUSPEND");
1216 ret = snd_pcm_oss_prepare(substream);
1220 mutex_unlock(&runtime->oss.params_lock);
1221 ret = __snd_pcm_lib_xfer(substream, (void *)ptr, true,
1223 mutex_lock(&runtime->oss.params_lock);
1224 if (ret != -EPIPE && ret != -ESTRPIPE)
1226 /* test, if we can't store new data, because the stream */
1227 /* has not been started */
1228 if (runtime->status->state == SNDRV_PCM_STATE_PREPARED)
1234 snd_pcm_sframes_t snd_pcm_oss_read3(struct snd_pcm_substream *substream, char *ptr, snd_pcm_uframes_t frames, int in_kernel)
1236 struct snd_pcm_runtime *runtime = substream->runtime;
1237 snd_pcm_sframes_t delay;
1240 if (runtime->status->state == SNDRV_PCM_STATE_XRUN ||
1241 runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) {
1243 pcm_dbg(substream->pcm,
1244 "pcm_oss: read: recovering from %s\n",
1245 runtime->status->state == SNDRV_PCM_STATE_XRUN ?
1246 "XRUN" : "SUSPEND");
1248 ret = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DRAIN, NULL);
1251 } else if (runtime->status->state == SNDRV_PCM_STATE_SETUP) {
1252 ret = snd_pcm_oss_prepare(substream);
1256 ret = snd_pcm_oss_capture_position_fixup(substream, &delay);
1259 mutex_unlock(&runtime->oss.params_lock);
1260 ret = __snd_pcm_lib_xfer(substream, (void *)ptr, true,
1262 mutex_lock(&runtime->oss.params_lock);
1263 if (ret == -EPIPE) {
1264 if (runtime->status->state == SNDRV_PCM_STATE_DRAINING) {
1265 ret = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DROP, NULL);
1271 if (ret != -ESTRPIPE)
1277 #ifdef CONFIG_SND_PCM_OSS_PLUGINS
1278 snd_pcm_sframes_t snd_pcm_oss_writev3(struct snd_pcm_substream *substream, void **bufs, snd_pcm_uframes_t frames)
1280 struct snd_pcm_runtime *runtime = substream->runtime;
1283 if (runtime->status->state == SNDRV_PCM_STATE_XRUN ||
1284 runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) {
1286 pcm_dbg(substream->pcm,
1287 "pcm_oss: writev: recovering from %s\n",
1288 runtime->status->state == SNDRV_PCM_STATE_XRUN ?
1289 "XRUN" : "SUSPEND");
1291 ret = snd_pcm_oss_prepare(substream);
1295 ret = snd_pcm_kernel_writev(substream, bufs, frames);
1296 if (ret != -EPIPE && ret != -ESTRPIPE)
1299 /* test, if we can't store new data, because the stream */
1300 /* has not been started */
1301 if (runtime->status->state == SNDRV_PCM_STATE_PREPARED)
1307 snd_pcm_sframes_t snd_pcm_oss_readv3(struct snd_pcm_substream *substream, void **bufs, snd_pcm_uframes_t frames)
1309 struct snd_pcm_runtime *runtime = substream->runtime;
1312 if (runtime->status->state == SNDRV_PCM_STATE_XRUN ||
1313 runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) {
1315 pcm_dbg(substream->pcm,
1316 "pcm_oss: readv: recovering from %s\n",
1317 runtime->status->state == SNDRV_PCM_STATE_XRUN ?
1318 "XRUN" : "SUSPEND");
1320 ret = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DRAIN, NULL);
1323 } else if (runtime->status->state == SNDRV_PCM_STATE_SETUP) {
1324 ret = snd_pcm_oss_prepare(substream);
1328 ret = snd_pcm_kernel_readv(substream, bufs, frames);
1329 if (ret != -EPIPE && ret != -ESTRPIPE)
1334 #endif /* CONFIG_SND_PCM_OSS_PLUGINS */
1336 static ssize_t snd_pcm_oss_write2(struct snd_pcm_substream *substream, const char *buf, size_t bytes, int in_kernel)
1338 struct snd_pcm_runtime *runtime = substream->runtime;
1339 snd_pcm_sframes_t frames, frames1;
1340 #ifdef CONFIG_SND_PCM_OSS_PLUGINS
1341 if (runtime->oss.plugin_first) {
1342 struct snd_pcm_plugin_channel *channels;
1343 size_t oss_frame_bytes = (runtime->oss.plugin_first->src_width * runtime->oss.plugin_first->src_format.channels) / 8;
1345 if (copy_from_user(runtime->oss.buffer, (const char __force __user *)buf, bytes))
1347 buf = runtime->oss.buffer;
1349 frames = bytes / oss_frame_bytes;
1350 frames1 = snd_pcm_plug_client_channels_buf(substream, (char *)buf, frames, &channels);
1353 frames1 = snd_pcm_plug_write_transfer(substream, channels, frames1);
1356 bytes = frames1 * oss_frame_bytes;
1360 frames = bytes_to_frames(runtime, bytes);
1361 frames1 = snd_pcm_oss_write3(substream, buf, frames, in_kernel);
1364 bytes = frames_to_bytes(runtime, frames1);
1369 static ssize_t snd_pcm_oss_write1(struct snd_pcm_substream *substream, const char __user *buf, size_t bytes)
1373 struct snd_pcm_runtime *runtime = substream->runtime;
1375 if (atomic_read(&substream->mmap_count))
1378 atomic_inc(&runtime->oss.rw_ref);
1380 if (mutex_lock_interruptible(&runtime->oss.params_lock)) {
1384 tmp = snd_pcm_oss_make_ready_locked(substream);
1387 if (bytes < runtime->oss.period_bytes || runtime->oss.buffer_used > 0) {
1389 if (tmp + runtime->oss.buffer_used > runtime->oss.period_bytes)
1390 tmp = runtime->oss.period_bytes - runtime->oss.buffer_used;
1392 if (copy_from_user(runtime->oss.buffer + runtime->oss.buffer_used, buf, tmp)) {
1397 runtime->oss.buffer_used += tmp;
1401 if (substream->oss.setup.partialfrag ||
1402 runtime->oss.buffer_used == runtime->oss.period_bytes) {
1403 tmp = snd_pcm_oss_write2(substream, runtime->oss.buffer + runtime->oss.period_ptr,
1404 runtime->oss.buffer_used - runtime->oss.period_ptr, 1);
1407 runtime->oss.bytes += tmp;
1408 runtime->oss.period_ptr += tmp;
1409 runtime->oss.period_ptr %= runtime->oss.period_bytes;
1410 if (runtime->oss.period_ptr == 0 ||
1411 runtime->oss.period_ptr == runtime->oss.buffer_used)
1412 runtime->oss.buffer_used = 0;
1413 else if ((substream->f_flags & O_NONBLOCK) != 0) {
1419 tmp = snd_pcm_oss_write2(substream,
1420 (const char __force *)buf,
1421 runtime->oss.period_bytes, 0);
1424 runtime->oss.bytes += tmp;
1428 if ((substream->f_flags & O_NONBLOCK) != 0 &&
1429 tmp != runtime->oss.period_bytes)
1433 mutex_unlock(&runtime->oss.params_lock);
1436 if (signal_pending(current)) {
1442 atomic_dec(&runtime->oss.rw_ref);
1443 return xfer > 0 ? (snd_pcm_sframes_t)xfer : tmp;
1446 static ssize_t snd_pcm_oss_read2(struct snd_pcm_substream *substream, char *buf, size_t bytes, int in_kernel)
1448 struct snd_pcm_runtime *runtime = substream->runtime;
1449 snd_pcm_sframes_t frames, frames1;
1450 #ifdef CONFIG_SND_PCM_OSS_PLUGINS
1451 char __user *final_dst = (char __force __user *)buf;
1452 if (runtime->oss.plugin_first) {
1453 struct snd_pcm_plugin_channel *channels;
1454 size_t oss_frame_bytes = (runtime->oss.plugin_last->dst_width * runtime->oss.plugin_last->dst_format.channels) / 8;
1456 buf = runtime->oss.buffer;
1457 frames = bytes / oss_frame_bytes;
1458 frames1 = snd_pcm_plug_client_channels_buf(substream, buf, frames, &channels);
1461 frames1 = snd_pcm_plug_read_transfer(substream, channels, frames1);
1464 bytes = frames1 * oss_frame_bytes;
1465 if (!in_kernel && copy_to_user(final_dst, buf, bytes))
1470 frames = bytes_to_frames(runtime, bytes);
1471 frames1 = snd_pcm_oss_read3(substream, buf, frames, in_kernel);
1474 bytes = frames_to_bytes(runtime, frames1);
1479 static ssize_t snd_pcm_oss_read1(struct snd_pcm_substream *substream, char __user *buf, size_t bytes)
1483 struct snd_pcm_runtime *runtime = substream->runtime;
1485 if (atomic_read(&substream->mmap_count))
1488 atomic_inc(&runtime->oss.rw_ref);
1490 if (mutex_lock_interruptible(&runtime->oss.params_lock)) {
1494 tmp = snd_pcm_oss_make_ready_locked(substream);
1497 if (bytes < runtime->oss.period_bytes || runtime->oss.buffer_used > 0) {
1498 if (runtime->oss.buffer_used == 0) {
1499 tmp = snd_pcm_oss_read2(substream, runtime->oss.buffer, runtime->oss.period_bytes, 1);
1502 runtime->oss.bytes += tmp;
1503 runtime->oss.period_ptr = tmp;
1504 runtime->oss.buffer_used = tmp;
1507 if ((size_t) tmp > runtime->oss.buffer_used)
1508 tmp = runtime->oss.buffer_used;
1509 if (copy_to_user(buf, runtime->oss.buffer + (runtime->oss.period_ptr - runtime->oss.buffer_used), tmp)) {
1516 runtime->oss.buffer_used -= tmp;
1518 tmp = snd_pcm_oss_read2(substream, (char __force *)buf,
1519 runtime->oss.period_bytes, 0);
1522 runtime->oss.bytes += tmp;
1528 mutex_unlock(&runtime->oss.params_lock);
1531 if (signal_pending(current)) {
1537 atomic_dec(&runtime->oss.rw_ref);
1538 return xfer > 0 ? (snd_pcm_sframes_t)xfer : tmp;
1541 static int snd_pcm_oss_reset(struct snd_pcm_oss_file *pcm_oss_file)
1543 struct snd_pcm_substream *substream;
1544 struct snd_pcm_runtime *runtime;
1547 for (i = 0; i < 2; i++) {
1548 substream = pcm_oss_file->streams[i];
1551 runtime = substream->runtime;
1552 snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DROP, NULL);
1553 mutex_lock(&runtime->oss.params_lock);
1554 runtime->oss.prepare = 1;
1555 runtime->oss.buffer_used = 0;
1556 runtime->oss.prev_hw_ptr_period = 0;
1557 runtime->oss.period_ptr = 0;
1558 mutex_unlock(&runtime->oss.params_lock);
1563 static int snd_pcm_oss_post(struct snd_pcm_oss_file *pcm_oss_file)
1565 struct snd_pcm_substream *substream;
1568 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
1569 if (substream != NULL) {
1570 if ((err = snd_pcm_oss_make_ready(substream)) < 0)
1572 snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_START, NULL);
1574 /* note: all errors from the start action are ignored */
1575 /* OSS apps do not know, how to handle them */
1579 static int snd_pcm_oss_sync1(struct snd_pcm_substream *substream, size_t size)
1581 struct snd_pcm_runtime *runtime;
1583 snd_pcm_state_t state;
1585 wait_queue_entry_t wait;
1587 runtime = substream->runtime;
1588 init_waitqueue_entry(&wait, current);
1589 add_wait_queue(&runtime->sleep, &wait);
1591 pcm_dbg(substream->pcm, "sync1: size = %li\n", size);
1594 result = snd_pcm_oss_write2(substream, runtime->oss.buffer, size, 1);
1596 runtime->oss.buffer_used = 0;
1600 if (result != 0 && result != -EAGAIN)
1603 set_current_state(TASK_INTERRUPTIBLE);
1604 snd_pcm_stream_lock_irq(substream);
1605 state = runtime->status->state;
1606 snd_pcm_stream_unlock_irq(substream);
1607 if (state != SNDRV_PCM_STATE_RUNNING) {
1608 set_current_state(TASK_RUNNING);
1611 res = schedule_timeout(10 * HZ);
1612 if (signal_pending(current)) {
1613 result = -ERESTARTSYS;
1617 pcm_err(substream->pcm,
1618 "OSS sync error - DMA timeout\n");
1623 remove_wait_queue(&runtime->sleep, &wait);
1627 static int snd_pcm_oss_sync(struct snd_pcm_oss_file *pcm_oss_file)
1630 unsigned int saved_f_flags;
1631 struct snd_pcm_substream *substream;
1632 struct snd_pcm_runtime *runtime;
1633 snd_pcm_format_t format;
1634 unsigned long width;
1637 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
1638 if (substream != NULL) {
1639 runtime = substream->runtime;
1640 if (atomic_read(&substream->mmap_count))
1642 if ((err = snd_pcm_oss_make_ready(substream)) < 0)
1644 atomic_inc(&runtime->oss.rw_ref);
1645 if (mutex_lock_interruptible(&runtime->oss.params_lock)) {
1646 atomic_dec(&runtime->oss.rw_ref);
1647 return -ERESTARTSYS;
1649 format = snd_pcm_oss_format_from(runtime->oss.format);
1650 width = snd_pcm_format_physical_width(format);
1651 if (runtime->oss.buffer_used > 0) {
1653 pcm_dbg(substream->pcm, "sync: buffer_used\n");
1655 size = (8 * (runtime->oss.period_bytes - runtime->oss.buffer_used) + 7) / width;
1656 snd_pcm_format_set_silence(format,
1657 runtime->oss.buffer + runtime->oss.buffer_used,
1659 err = snd_pcm_oss_sync1(substream, runtime->oss.period_bytes);
1662 } else if (runtime->oss.period_ptr > 0) {
1664 pcm_dbg(substream->pcm, "sync: period_ptr\n");
1666 size = runtime->oss.period_bytes - runtime->oss.period_ptr;
1667 snd_pcm_format_set_silence(format,
1668 runtime->oss.buffer,
1670 err = snd_pcm_oss_sync1(substream, size);
1675 * The ALSA's period might be a bit large than OSS one.
1676 * Fill the remain portion of ALSA period with zeros.
1678 size = runtime->control->appl_ptr % runtime->period_size;
1680 size = runtime->period_size - size;
1681 if (runtime->access == SNDRV_PCM_ACCESS_RW_INTERLEAVED)
1682 snd_pcm_lib_write(substream, NULL, size);
1683 else if (runtime->access == SNDRV_PCM_ACCESS_RW_NONINTERLEAVED)
1684 snd_pcm_lib_writev(substream, NULL, size);
1687 mutex_unlock(&runtime->oss.params_lock);
1688 atomic_dec(&runtime->oss.rw_ref);
1692 * finish sync: drain the buffer
1695 saved_f_flags = substream->f_flags;
1696 substream->f_flags &= ~O_NONBLOCK;
1697 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DRAIN, NULL);
1698 substream->f_flags = saved_f_flags;
1701 mutex_lock(&runtime->oss.params_lock);
1702 runtime->oss.prepare = 1;
1703 mutex_unlock(&runtime->oss.params_lock);
1706 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
1707 if (substream != NULL) {
1708 if ((err = snd_pcm_oss_make_ready(substream)) < 0)
1710 runtime = substream->runtime;
1711 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DROP, NULL);
1714 mutex_lock(&runtime->oss.params_lock);
1715 runtime->oss.buffer_used = 0;
1716 runtime->oss.prepare = 1;
1717 mutex_unlock(&runtime->oss.params_lock);
1722 static int snd_pcm_oss_set_rate(struct snd_pcm_oss_file *pcm_oss_file, int rate)
1726 for (idx = 1; idx >= 0; --idx) {
1727 struct snd_pcm_substream *substream = pcm_oss_file->streams[idx];
1728 struct snd_pcm_runtime *runtime;
1731 if (substream == NULL)
1733 runtime = substream->runtime;
1736 else if (rate > 192000)
1738 err = lock_params(runtime);
1741 if (runtime->oss.rate != rate) {
1742 runtime->oss.params = 1;
1743 runtime->oss.rate = rate;
1745 unlock_params(runtime);
1747 return snd_pcm_oss_get_rate(pcm_oss_file);
1750 static int snd_pcm_oss_get_rate(struct snd_pcm_oss_file *pcm_oss_file)
1752 struct snd_pcm_substream *substream;
1755 if ((err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream)) < 0)
1757 return substream->runtime->oss.rate;
1760 static int snd_pcm_oss_set_channels(struct snd_pcm_oss_file *pcm_oss_file, unsigned int channels)
1767 for (idx = 1; idx >= 0; --idx) {
1768 struct snd_pcm_substream *substream = pcm_oss_file->streams[idx];
1769 struct snd_pcm_runtime *runtime;
1772 if (substream == NULL)
1774 runtime = substream->runtime;
1775 err = lock_params(runtime);
1778 if (runtime->oss.channels != channels) {
1779 runtime->oss.params = 1;
1780 runtime->oss.channels = channels;
1782 unlock_params(runtime);
1784 return snd_pcm_oss_get_channels(pcm_oss_file);
1787 static int snd_pcm_oss_get_channels(struct snd_pcm_oss_file *pcm_oss_file)
1789 struct snd_pcm_substream *substream;
1792 if ((err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream)) < 0)
1794 return substream->runtime->oss.channels;
1797 static int snd_pcm_oss_get_block_size(struct snd_pcm_oss_file *pcm_oss_file)
1799 struct snd_pcm_substream *substream;
1802 if ((err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream)) < 0)
1804 return substream->runtime->oss.period_bytes;
1807 static int snd_pcm_oss_get_formats(struct snd_pcm_oss_file *pcm_oss_file)
1809 struct snd_pcm_substream *substream;
1812 struct snd_pcm_hw_params *params;
1813 unsigned int formats = 0;
1814 const struct snd_mask *format_mask;
1817 if ((err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream)) < 0)
1819 if (atomic_read(&substream->mmap_count))
1822 direct = substream->oss.setup.direct;
1824 return AFMT_MU_LAW | AFMT_U8 |
1825 AFMT_S16_LE | AFMT_S16_BE |
1826 AFMT_S8 | AFMT_U16_LE |
1828 AFMT_S32_LE | AFMT_S32_BE |
1829 AFMT_S24_LE | AFMT_S24_BE |
1831 params = kmalloc(sizeof(*params), GFP_KERNEL);
1834 _snd_pcm_hw_params_any(params);
1835 err = snd_pcm_hw_refine(substream, params);
1838 format_mask = hw_param_mask_c(params, SNDRV_PCM_HW_PARAM_FORMAT);
1839 for (fmt = 0; fmt < 32; ++fmt) {
1840 if (snd_mask_test(format_mask, fmt)) {
1841 int f = snd_pcm_oss_format_to((__force snd_pcm_format_t)fmt);
1849 return err < 0 ? err : formats;
1852 static int snd_pcm_oss_set_format(struct snd_pcm_oss_file *pcm_oss_file, int format)
1857 if (format != AFMT_QUERY) {
1858 formats = snd_pcm_oss_get_formats(pcm_oss_file);
1861 if (!(formats & format))
1863 for (idx = 1; idx >= 0; --idx) {
1864 struct snd_pcm_substream *substream = pcm_oss_file->streams[idx];
1865 struct snd_pcm_runtime *runtime;
1866 if (substream == NULL)
1868 runtime = substream->runtime;
1869 err = lock_params(runtime);
1872 if (runtime->oss.format != format) {
1873 runtime->oss.params = 1;
1874 runtime->oss.format = format;
1876 unlock_params(runtime);
1879 return snd_pcm_oss_get_format(pcm_oss_file);
1882 static int snd_pcm_oss_get_format(struct snd_pcm_oss_file *pcm_oss_file)
1884 struct snd_pcm_substream *substream;
1887 if ((err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream)) < 0)
1889 return substream->runtime->oss.format;
1892 static int snd_pcm_oss_set_subdivide1(struct snd_pcm_substream *substream, int subdivide)
1894 struct snd_pcm_runtime *runtime;
1896 runtime = substream->runtime;
1897 if (subdivide == 0) {
1898 subdivide = runtime->oss.subdivision;
1903 if (runtime->oss.subdivision || runtime->oss.fragshift)
1905 if (subdivide != 1 && subdivide != 2 && subdivide != 4 &&
1906 subdivide != 8 && subdivide != 16)
1908 runtime->oss.subdivision = subdivide;
1909 runtime->oss.params = 1;
1913 static int snd_pcm_oss_set_subdivide(struct snd_pcm_oss_file *pcm_oss_file, int subdivide)
1915 int err = -EINVAL, idx;
1917 for (idx = 1; idx >= 0; --idx) {
1918 struct snd_pcm_substream *substream = pcm_oss_file->streams[idx];
1919 struct snd_pcm_runtime *runtime;
1921 if (substream == NULL)
1923 runtime = substream->runtime;
1924 err = lock_params(runtime);
1927 err = snd_pcm_oss_set_subdivide1(substream, subdivide);
1928 unlock_params(runtime);
1935 static int snd_pcm_oss_set_fragment1(struct snd_pcm_substream *substream, unsigned int val)
1937 struct snd_pcm_runtime *runtime;
1940 runtime = substream->runtime;
1941 if (runtime->oss.subdivision || runtime->oss.fragshift)
1943 fragshift = val & 0xffff;
1944 if (fragshift >= 31)
1946 runtime->oss.fragshift = fragshift;
1947 runtime->oss.maxfrags = (val >> 16) & 0xffff;
1948 if (runtime->oss.fragshift < 4) /* < 16 */
1949 runtime->oss.fragshift = 4;
1950 if (runtime->oss.maxfrags < 2)
1951 runtime->oss.maxfrags = 2;
1952 runtime->oss.params = 1;
1956 static int snd_pcm_oss_set_fragment(struct snd_pcm_oss_file *pcm_oss_file, unsigned int val)
1958 int err = -EINVAL, idx;
1960 for (idx = 1; idx >= 0; --idx) {
1961 struct snd_pcm_substream *substream = pcm_oss_file->streams[idx];
1962 struct snd_pcm_runtime *runtime;
1964 if (substream == NULL)
1966 runtime = substream->runtime;
1967 err = lock_params(runtime);
1970 err = snd_pcm_oss_set_fragment1(substream, val);
1971 unlock_params(runtime);
1978 static int snd_pcm_oss_nonblock(struct file * file)
1980 spin_lock(&file->f_lock);
1981 file->f_flags |= O_NONBLOCK;
1982 spin_unlock(&file->f_lock);
1986 static int snd_pcm_oss_get_caps1(struct snd_pcm_substream *substream, int res)
1989 if (substream == NULL) {
1990 res &= ~DSP_CAP_DUPLEX;
1993 #ifdef DSP_CAP_MULTI
1994 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
1995 if (substream->pstr->substream_count > 1)
1996 res |= DSP_CAP_MULTI;
1998 /* DSP_CAP_REALTIME is set all times: */
1999 /* all ALSA drivers can return actual pointer in ring buffer */
2000 #if defined(DSP_CAP_REALTIME) && 0
2002 struct snd_pcm_runtime *runtime = substream->runtime;
2003 if (runtime->info & (SNDRV_PCM_INFO_BLOCK_TRANSFER|SNDRV_PCM_INFO_BATCH))
2004 res &= ~DSP_CAP_REALTIME;
2010 static int snd_pcm_oss_get_caps(struct snd_pcm_oss_file *pcm_oss_file)
2014 result = DSP_CAP_TRIGGER | DSP_CAP_MMAP | DSP_CAP_DUPLEX | DSP_CAP_REALTIME;
2015 for (idx = 0; idx < 2; idx++) {
2016 struct snd_pcm_substream *substream = pcm_oss_file->streams[idx];
2017 result = snd_pcm_oss_get_caps1(substream, result);
2019 result |= 0x0001; /* revision - same as SB AWE 64 */
2023 static void snd_pcm_oss_simulate_fill(struct snd_pcm_substream *substream,
2024 snd_pcm_uframes_t hw_ptr)
2026 struct snd_pcm_runtime *runtime = substream->runtime;
2027 snd_pcm_uframes_t appl_ptr;
2028 appl_ptr = hw_ptr + runtime->buffer_size;
2029 appl_ptr %= runtime->boundary;
2030 runtime->control->appl_ptr = appl_ptr;
2033 static int snd_pcm_oss_set_trigger(struct snd_pcm_oss_file *pcm_oss_file, int trigger)
2035 struct snd_pcm_runtime *runtime;
2036 struct snd_pcm_substream *psubstream = NULL, *csubstream = NULL;
2040 pcm_dbg(substream->pcm, "pcm_oss: trigger = 0x%x\n", trigger);
2043 psubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
2044 csubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
2047 if ((err = snd_pcm_oss_make_ready(psubstream)) < 0)
2051 if ((err = snd_pcm_oss_make_ready(csubstream)) < 0)
2055 runtime = psubstream->runtime;
2057 if (mutex_lock_interruptible(&runtime->oss.params_lock))
2058 return -ERESTARTSYS;
2059 if (trigger & PCM_ENABLE_OUTPUT) {
2060 if (runtime->oss.trigger)
2062 if (atomic_read(&psubstream->mmap_count))
2063 snd_pcm_oss_simulate_fill(psubstream,
2064 get_hw_ptr_period(runtime));
2065 runtime->oss.trigger = 1;
2066 runtime->start_threshold = 1;
2067 cmd = SNDRV_PCM_IOCTL_START;
2069 if (!runtime->oss.trigger)
2071 runtime->oss.trigger = 0;
2072 runtime->start_threshold = runtime->boundary;
2073 cmd = SNDRV_PCM_IOCTL_DROP;
2074 runtime->oss.prepare = 1;
2077 mutex_unlock(&runtime->oss.params_lock);
2079 err = snd_pcm_kernel_ioctl(psubstream, cmd, NULL);
2085 runtime = csubstream->runtime;
2087 if (mutex_lock_interruptible(&runtime->oss.params_lock))
2088 return -ERESTARTSYS;
2089 if (trigger & PCM_ENABLE_INPUT) {
2090 if (runtime->oss.trigger)
2092 runtime->oss.trigger = 1;
2093 runtime->start_threshold = 1;
2094 cmd = SNDRV_PCM_IOCTL_START;
2096 if (!runtime->oss.trigger)
2098 runtime->oss.trigger = 0;
2099 runtime->start_threshold = runtime->boundary;
2100 cmd = SNDRV_PCM_IOCTL_DROP;
2101 runtime->oss.prepare = 1;
2104 mutex_unlock(&runtime->oss.params_lock);
2106 err = snd_pcm_kernel_ioctl(csubstream, cmd, NULL);
2114 static int snd_pcm_oss_get_trigger(struct snd_pcm_oss_file *pcm_oss_file)
2116 struct snd_pcm_substream *psubstream = NULL, *csubstream = NULL;
2119 psubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
2120 csubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
2121 if (psubstream && psubstream->runtime && psubstream->runtime->oss.trigger)
2122 result |= PCM_ENABLE_OUTPUT;
2123 if (csubstream && csubstream->runtime && csubstream->runtime->oss.trigger)
2124 result |= PCM_ENABLE_INPUT;
2128 static int snd_pcm_oss_get_odelay(struct snd_pcm_oss_file *pcm_oss_file)
2130 struct snd_pcm_substream *substream;
2131 struct snd_pcm_runtime *runtime;
2132 snd_pcm_sframes_t delay;
2135 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
2136 if (substream == NULL)
2138 if ((err = snd_pcm_oss_make_ready(substream)) < 0)
2140 runtime = substream->runtime;
2141 if (runtime->oss.params || runtime->oss.prepare)
2143 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DELAY, &delay);
2145 delay = 0; /* hack for broken OSS applications */
2148 return snd_pcm_oss_bytes(substream, delay);
2151 static int snd_pcm_oss_get_ptr(struct snd_pcm_oss_file *pcm_oss_file, int stream, struct count_info __user * _info)
2153 struct snd_pcm_substream *substream;
2154 struct snd_pcm_runtime *runtime;
2155 snd_pcm_sframes_t delay;
2157 struct count_info info;
2162 substream = pcm_oss_file->streams[stream];
2163 if (substream == NULL)
2165 if ((err = snd_pcm_oss_make_ready(substream)) < 0)
2167 runtime = substream->runtime;
2168 if (runtime->oss.params || runtime->oss.prepare) {
2169 memset(&info, 0, sizeof(info));
2170 if (copy_to_user(_info, &info, sizeof(info)))
2174 if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
2175 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DELAY, &delay);
2176 if (err == -EPIPE || err == -ESTRPIPE || (! err && delay < 0)) {
2181 fixup = runtime->oss.buffer_used;
2184 err = snd_pcm_oss_capture_position_fixup(substream, &delay);
2185 fixup = -runtime->oss.buffer_used;
2189 info.ptr = snd_pcm_oss_bytes(substream, runtime->status->hw_ptr % runtime->buffer_size);
2190 if (atomic_read(&substream->mmap_count)) {
2191 snd_pcm_sframes_t n;
2192 delay = get_hw_ptr_period(runtime);
2193 n = delay - runtime->oss.prev_hw_ptr_period;
2195 n += runtime->boundary;
2196 info.blocks = n / runtime->period_size;
2197 runtime->oss.prev_hw_ptr_period = delay;
2198 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
2199 snd_pcm_oss_simulate_fill(substream, delay);
2200 info.bytes = snd_pcm_oss_bytes(substream, runtime->status->hw_ptr) & INT_MAX;
2202 delay = snd_pcm_oss_bytes(substream, delay);
2203 if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
2204 if (substream->oss.setup.buggyptr)
2205 info.blocks = (runtime->oss.buffer_bytes - delay - fixup) / runtime->oss.period_bytes;
2207 info.blocks = (delay + fixup) / runtime->oss.period_bytes;
2208 info.bytes = (runtime->oss.bytes - delay) & INT_MAX;
2211 info.blocks = delay / runtime->oss.period_bytes;
2212 info.bytes = (runtime->oss.bytes + delay) & INT_MAX;
2215 if (copy_to_user(_info, &info, sizeof(info)))
2220 static int snd_pcm_oss_get_space(struct snd_pcm_oss_file *pcm_oss_file, int stream, struct audio_buf_info __user *_info)
2222 struct snd_pcm_substream *substream;
2223 struct snd_pcm_runtime *runtime;
2224 snd_pcm_sframes_t avail;
2226 struct audio_buf_info info;
2231 substream = pcm_oss_file->streams[stream];
2232 if (substream == NULL)
2234 runtime = substream->runtime;
2236 if (runtime->oss.params &&
2237 (err = snd_pcm_oss_change_params(substream, false)) < 0)
2240 info.fragsize = runtime->oss.period_bytes;
2241 info.fragstotal = runtime->periods;
2242 if (runtime->oss.prepare) {
2243 if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
2244 info.bytes = runtime->oss.period_bytes * runtime->oss.periods;
2245 info.fragments = runtime->oss.periods;
2251 if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
2252 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DELAY, &avail);
2253 if (err == -EPIPE || err == -ESTRPIPE || (! err && avail < 0)) {
2254 avail = runtime->buffer_size;
2258 avail = runtime->buffer_size - avail;
2259 fixup = -runtime->oss.buffer_used;
2262 err = snd_pcm_oss_capture_position_fixup(substream, &avail);
2263 fixup = runtime->oss.buffer_used;
2267 info.bytes = snd_pcm_oss_bytes(substream, avail) + fixup;
2268 info.fragments = info.bytes / runtime->oss.period_bytes;
2272 pcm_dbg(substream->pcm,
2273 "pcm_oss: space: bytes = %i, fragments = %i, fragstotal = %i, fragsize = %i\n",
2274 info.bytes, info.fragments, info.fragstotal, info.fragsize);
2276 if (copy_to_user(_info, &info, sizeof(info)))
2281 static int snd_pcm_oss_get_mapbuf(struct snd_pcm_oss_file *pcm_oss_file, int stream, struct buffmem_desc __user * _info)
2283 // it won't be probably implemented
2284 // pr_debug("TODO: snd_pcm_oss_get_mapbuf\n");
2288 static const char *strip_task_path(const char *path)
2290 const char *ptr, *ptrl = NULL;
2291 for (ptr = path; *ptr; ptr++) {
2298 static void snd_pcm_oss_look_for_setup(struct snd_pcm *pcm, int stream,
2299 const char *task_name,
2300 struct snd_pcm_oss_setup *rsetup)
2302 struct snd_pcm_oss_setup *setup;
2304 mutex_lock(&pcm->streams[stream].oss.setup_mutex);
2306 for (setup = pcm->streams[stream].oss.setup_list; setup;
2307 setup = setup->next) {
2308 if (!strcmp(setup->task_name, task_name))
2311 } while ((task_name = strip_task_path(task_name)) != NULL);
2315 mutex_unlock(&pcm->streams[stream].oss.setup_mutex);
2318 static void snd_pcm_oss_release_substream(struct snd_pcm_substream *substream)
2320 struct snd_pcm_runtime *runtime;
2321 runtime = substream->runtime;
2322 kvfree(runtime->oss.buffer);
2323 runtime->oss.buffer = NULL;
2324 #ifdef CONFIG_SND_PCM_OSS_PLUGINS
2325 snd_pcm_oss_plugin_clear(substream);
2327 substream->oss.oss = 0;
2330 static void snd_pcm_oss_init_substream(struct snd_pcm_substream *substream,
2331 struct snd_pcm_oss_setup *setup,
2334 struct snd_pcm_runtime *runtime;
2336 substream->oss.oss = 1;
2337 substream->oss.setup = *setup;
2338 if (setup->nonblock)
2339 substream->f_flags |= O_NONBLOCK;
2340 else if (setup->block)
2341 substream->f_flags &= ~O_NONBLOCK;
2342 runtime = substream->runtime;
2343 runtime->oss.params = 1;
2344 runtime->oss.trigger = 1;
2345 runtime->oss.rate = 8000;
2346 mutex_init(&runtime->oss.params_lock);
2347 switch (SNDRV_MINOR_OSS_DEVICE(minor)) {
2348 case SNDRV_MINOR_OSS_PCM_8:
2349 runtime->oss.format = AFMT_U8;
2351 case SNDRV_MINOR_OSS_PCM_16:
2352 runtime->oss.format = AFMT_S16_LE;
2355 runtime->oss.format = AFMT_MU_LAW;
2357 runtime->oss.channels = 1;
2358 runtime->oss.fragshift = 0;
2359 runtime->oss.maxfrags = 0;
2360 runtime->oss.subdivision = 0;
2361 substream->pcm_release = snd_pcm_oss_release_substream;
2362 atomic_set(&runtime->oss.rw_ref, 0);
2365 static int snd_pcm_oss_release_file(struct snd_pcm_oss_file *pcm_oss_file)
2370 for (cidx = 0; cidx < 2; ++cidx) {
2371 struct snd_pcm_substream *substream = pcm_oss_file->streams[cidx];
2373 snd_pcm_release_substream(substream);
2375 kfree(pcm_oss_file);
2379 static int snd_pcm_oss_open_file(struct file *file,
2380 struct snd_pcm *pcm,
2381 struct snd_pcm_oss_file **rpcm_oss_file,
2383 struct snd_pcm_oss_setup *setup)
2386 struct snd_pcm_oss_file *pcm_oss_file;
2387 struct snd_pcm_substream *substream;
2388 fmode_t f_mode = file->f_mode;
2391 *rpcm_oss_file = NULL;
2393 pcm_oss_file = kzalloc(sizeof(*pcm_oss_file), GFP_KERNEL);
2394 if (pcm_oss_file == NULL)
2397 if ((f_mode & (FMODE_WRITE|FMODE_READ)) == (FMODE_WRITE|FMODE_READ) &&
2398 (pcm->info_flags & SNDRV_PCM_INFO_HALF_DUPLEX))
2399 f_mode = FMODE_WRITE;
2401 file->f_flags &= ~O_APPEND;
2402 for (idx = 0; idx < 2; idx++) {
2403 if (setup[idx].disable)
2405 if (! pcm->streams[idx].substream_count)
2406 continue; /* no matching substream */
2407 if (idx == SNDRV_PCM_STREAM_PLAYBACK) {
2408 if (! (f_mode & FMODE_WRITE))
2411 if (! (f_mode & FMODE_READ))
2414 err = snd_pcm_open_substream(pcm, idx, file, &substream);
2416 snd_pcm_oss_release_file(pcm_oss_file);
2420 pcm_oss_file->streams[idx] = substream;
2421 snd_pcm_oss_init_substream(substream, &setup[idx], minor);
2424 if (!pcm_oss_file->streams[0] && !pcm_oss_file->streams[1]) {
2425 snd_pcm_oss_release_file(pcm_oss_file);
2429 file->private_data = pcm_oss_file;
2431 *rpcm_oss_file = pcm_oss_file;
2436 static int snd_task_name(struct task_struct *task, char *name, size_t size)
2440 if (snd_BUG_ON(!task || !name || size < 2))
2442 for (idx = 0; idx < sizeof(task->comm) && idx + 1 < size; idx++)
2443 name[idx] = task->comm[idx];
2448 static int snd_pcm_oss_open(struct inode *inode, struct file *file)
2452 struct snd_pcm *pcm;
2453 struct snd_pcm_oss_file *pcm_oss_file;
2454 struct snd_pcm_oss_setup setup[2];
2456 wait_queue_entry_t wait;
2458 err = nonseekable_open(inode, file);
2462 pcm = snd_lookup_oss_minor_data(iminor(inode),
2463 SNDRV_OSS_DEVICE_TYPE_PCM);
2468 err = snd_card_file_add(pcm->card, file);
2471 if (!try_module_get(pcm->card->module)) {
2475 if (snd_task_name(current, task_name, sizeof(task_name)) < 0) {
2479 memset(setup, 0, sizeof(setup));
2480 if (file->f_mode & FMODE_WRITE)
2481 snd_pcm_oss_look_for_setup(pcm, SNDRV_PCM_STREAM_PLAYBACK,
2482 task_name, &setup[0]);
2483 if (file->f_mode & FMODE_READ)
2484 snd_pcm_oss_look_for_setup(pcm, SNDRV_PCM_STREAM_CAPTURE,
2485 task_name, &setup[1]);
2487 nonblock = !!(file->f_flags & O_NONBLOCK);
2489 nonblock = nonblock_open;
2491 init_waitqueue_entry(&wait, current);
2492 add_wait_queue(&pcm->open_wait, &wait);
2493 mutex_lock(&pcm->open_mutex);
2495 err = snd_pcm_oss_open_file(file, pcm, &pcm_oss_file,
2496 iminor(inode), setup);
2499 if (err == -EAGAIN) {
2506 set_current_state(TASK_INTERRUPTIBLE);
2507 mutex_unlock(&pcm->open_mutex);
2509 mutex_lock(&pcm->open_mutex);
2510 if (pcm->card->shutdown) {
2514 if (signal_pending(current)) {
2519 remove_wait_queue(&pcm->open_wait, &wait);
2520 mutex_unlock(&pcm->open_mutex);
2523 snd_card_unref(pcm->card);
2527 module_put(pcm->card->module);
2529 snd_card_file_remove(pcm->card, file);
2532 snd_card_unref(pcm->card);
2536 static int snd_pcm_oss_release(struct inode *inode, struct file *file)
2538 struct snd_pcm *pcm;
2539 struct snd_pcm_substream *substream;
2540 struct snd_pcm_oss_file *pcm_oss_file;
2542 pcm_oss_file = file->private_data;
2543 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
2544 if (substream == NULL)
2545 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
2546 if (snd_BUG_ON(!substream))
2548 pcm = substream->pcm;
2549 if (!pcm->card->shutdown)
2550 snd_pcm_oss_sync(pcm_oss_file);
2551 mutex_lock(&pcm->open_mutex);
2552 snd_pcm_oss_release_file(pcm_oss_file);
2553 mutex_unlock(&pcm->open_mutex);
2554 wake_up(&pcm->open_wait);
2555 module_put(pcm->card->module);
2556 snd_card_file_remove(pcm->card, file);
2560 static long snd_pcm_oss_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
2562 struct snd_pcm_oss_file *pcm_oss_file;
2563 int __user *p = (int __user *)arg;
2566 pcm_oss_file = file->private_data;
2567 if (cmd == OSS_GETVERSION)
2568 return put_user(SNDRV_OSS_VERSION, p);
2569 if (cmd == OSS_ALSAEMULVER)
2570 return put_user(1, p);
2571 #if IS_REACHABLE(CONFIG_SND_MIXER_OSS)
2572 if (((cmd >> 8) & 0xff) == 'M') { /* mixer ioctl - for OSS compatibility */
2573 struct snd_pcm_substream *substream;
2575 for (idx = 0; idx < 2; ++idx) {
2576 substream = pcm_oss_file->streams[idx];
2577 if (substream != NULL)
2580 if (snd_BUG_ON(idx >= 2))
2582 return snd_mixer_oss_ioctl_card(substream->pcm->card, cmd, arg);
2585 if (((cmd >> 8) & 0xff) != 'P')
2588 pr_debug("pcm_oss: ioctl = 0x%x\n", cmd);
2591 case SNDCTL_DSP_RESET:
2592 return snd_pcm_oss_reset(pcm_oss_file);
2593 case SNDCTL_DSP_SYNC:
2594 return snd_pcm_oss_sync(pcm_oss_file);
2595 case SNDCTL_DSP_SPEED:
2596 if (get_user(res, p))
2598 if ((res = snd_pcm_oss_set_rate(pcm_oss_file, res))<0)
2600 return put_user(res, p);
2601 case SOUND_PCM_READ_RATE:
2602 res = snd_pcm_oss_get_rate(pcm_oss_file);
2605 return put_user(res, p);
2606 case SNDCTL_DSP_STEREO:
2607 if (get_user(res, p))
2609 res = res > 0 ? 2 : 1;
2610 if ((res = snd_pcm_oss_set_channels(pcm_oss_file, res)) < 0)
2612 return put_user(--res, p);
2613 case SNDCTL_DSP_GETBLKSIZE:
2614 res = snd_pcm_oss_get_block_size(pcm_oss_file);
2617 return put_user(res, p);
2618 case SNDCTL_DSP_SETFMT:
2619 if (get_user(res, p))
2621 res = snd_pcm_oss_set_format(pcm_oss_file, res);
2624 return put_user(res, p);
2625 case SOUND_PCM_READ_BITS:
2626 res = snd_pcm_oss_get_format(pcm_oss_file);
2629 return put_user(res, p);
2630 case SNDCTL_DSP_CHANNELS:
2631 if (get_user(res, p))
2633 res = snd_pcm_oss_set_channels(pcm_oss_file, res);
2636 return put_user(res, p);
2637 case SOUND_PCM_READ_CHANNELS:
2638 res = snd_pcm_oss_get_channels(pcm_oss_file);
2641 return put_user(res, p);
2642 case SOUND_PCM_WRITE_FILTER:
2643 case SOUND_PCM_READ_FILTER:
2645 case SNDCTL_DSP_POST:
2646 return snd_pcm_oss_post(pcm_oss_file);
2647 case SNDCTL_DSP_SUBDIVIDE:
2648 if (get_user(res, p))
2650 res = snd_pcm_oss_set_subdivide(pcm_oss_file, res);
2653 return put_user(res, p);
2654 case SNDCTL_DSP_SETFRAGMENT:
2655 if (get_user(res, p))
2657 return snd_pcm_oss_set_fragment(pcm_oss_file, res);
2658 case SNDCTL_DSP_GETFMTS:
2659 res = snd_pcm_oss_get_formats(pcm_oss_file);
2662 return put_user(res, p);
2663 case SNDCTL_DSP_GETOSPACE:
2664 case SNDCTL_DSP_GETISPACE:
2665 return snd_pcm_oss_get_space(pcm_oss_file,
2666 cmd == SNDCTL_DSP_GETISPACE ?
2667 SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK,
2668 (struct audio_buf_info __user *) arg);
2669 case SNDCTL_DSP_NONBLOCK:
2670 return snd_pcm_oss_nonblock(file);
2671 case SNDCTL_DSP_GETCAPS:
2672 res = snd_pcm_oss_get_caps(pcm_oss_file);
2675 return put_user(res, p);
2676 case SNDCTL_DSP_GETTRIGGER:
2677 res = snd_pcm_oss_get_trigger(pcm_oss_file);
2680 return put_user(res, p);
2681 case SNDCTL_DSP_SETTRIGGER:
2682 if (get_user(res, p))
2684 return snd_pcm_oss_set_trigger(pcm_oss_file, res);
2685 case SNDCTL_DSP_GETIPTR:
2686 case SNDCTL_DSP_GETOPTR:
2687 return snd_pcm_oss_get_ptr(pcm_oss_file,
2688 cmd == SNDCTL_DSP_GETIPTR ?
2689 SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK,
2690 (struct count_info __user *) arg);
2691 case SNDCTL_DSP_MAPINBUF:
2692 case SNDCTL_DSP_MAPOUTBUF:
2693 return snd_pcm_oss_get_mapbuf(pcm_oss_file,
2694 cmd == SNDCTL_DSP_MAPINBUF ?
2695 SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK,
2696 (struct buffmem_desc __user *) arg);
2697 case SNDCTL_DSP_SETSYNCRO:
2698 /* stop DMA now.. */
2700 case SNDCTL_DSP_SETDUPLEX:
2701 if (snd_pcm_oss_get_caps(pcm_oss_file) & DSP_CAP_DUPLEX)
2704 case SNDCTL_DSP_GETODELAY:
2705 res = snd_pcm_oss_get_odelay(pcm_oss_file);
2707 /* it's for sure, some broken apps don't check for error codes */
2711 return put_user(res, p);
2712 case SNDCTL_DSP_PROFILE:
2713 return 0; /* silently ignore */
2715 pr_debug("pcm_oss: unknown command = 0x%x\n", cmd);
2720 #ifdef CONFIG_COMPAT
2721 /* all compatible */
2722 static long snd_pcm_oss_ioctl_compat(struct file *file, unsigned int cmd,
2726 * Everything is compatbile except SNDCTL_DSP_MAPINBUF/SNDCTL_DSP_MAPOUTBUF,
2727 * which are not implemented for the native case either
2729 return snd_pcm_oss_ioctl(file, cmd, (unsigned long)compat_ptr(arg));
2732 #define snd_pcm_oss_ioctl_compat NULL
2735 static ssize_t snd_pcm_oss_read(struct file *file, char __user *buf, size_t count, loff_t *offset)
2737 struct snd_pcm_oss_file *pcm_oss_file;
2738 struct snd_pcm_substream *substream;
2740 pcm_oss_file = file->private_data;
2741 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
2742 if (substream == NULL)
2744 substream->f_flags = file->f_flags & O_NONBLOCK;
2746 return snd_pcm_oss_read1(substream, buf, count);
2749 ssize_t res = snd_pcm_oss_read1(substream, buf, count);
2750 pcm_dbg(substream->pcm,
2751 "pcm_oss: read %li bytes (returned %li bytes)\n",
2752 (long)count, (long)res);
2758 static ssize_t snd_pcm_oss_write(struct file *file, const char __user *buf, size_t count, loff_t *offset)
2760 struct snd_pcm_oss_file *pcm_oss_file;
2761 struct snd_pcm_substream *substream;
2764 pcm_oss_file = file->private_data;
2765 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
2766 if (substream == NULL)
2768 substream->f_flags = file->f_flags & O_NONBLOCK;
2769 result = snd_pcm_oss_write1(substream, buf, count);
2771 pcm_dbg(substream->pcm, "pcm_oss: write %li bytes (wrote %li bytes)\n",
2772 (long)count, (long)result);
2777 static int snd_pcm_oss_playback_ready(struct snd_pcm_substream *substream)
2779 struct snd_pcm_runtime *runtime = substream->runtime;
2780 if (atomic_read(&substream->mmap_count))
2781 return runtime->oss.prev_hw_ptr_period !=
2782 get_hw_ptr_period(runtime);
2784 return snd_pcm_playback_avail(runtime) >=
2785 runtime->oss.period_frames;
2788 static int snd_pcm_oss_capture_ready(struct snd_pcm_substream *substream)
2790 struct snd_pcm_runtime *runtime = substream->runtime;
2791 if (atomic_read(&substream->mmap_count))
2792 return runtime->oss.prev_hw_ptr_period !=
2793 get_hw_ptr_period(runtime);
2795 return snd_pcm_capture_avail(runtime) >=
2796 runtime->oss.period_frames;
2799 static __poll_t snd_pcm_oss_poll(struct file *file, poll_table * wait)
2801 struct snd_pcm_oss_file *pcm_oss_file;
2803 struct snd_pcm_substream *psubstream = NULL, *csubstream = NULL;
2805 pcm_oss_file = file->private_data;
2807 psubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
2808 csubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
2811 if (psubstream != NULL) {
2812 struct snd_pcm_runtime *runtime = psubstream->runtime;
2813 poll_wait(file, &runtime->sleep, wait);
2814 snd_pcm_stream_lock_irq(psubstream);
2815 if (runtime->status->state != SNDRV_PCM_STATE_DRAINING &&
2816 (runtime->status->state != SNDRV_PCM_STATE_RUNNING ||
2817 snd_pcm_oss_playback_ready(psubstream)))
2818 mask |= EPOLLOUT | EPOLLWRNORM;
2819 snd_pcm_stream_unlock_irq(psubstream);
2821 if (csubstream != NULL) {
2822 struct snd_pcm_runtime *runtime = csubstream->runtime;
2823 snd_pcm_state_t ostate;
2824 poll_wait(file, &runtime->sleep, wait);
2825 snd_pcm_stream_lock_irq(csubstream);
2826 if ((ostate = runtime->status->state) != SNDRV_PCM_STATE_RUNNING ||
2827 snd_pcm_oss_capture_ready(csubstream))
2828 mask |= EPOLLIN | EPOLLRDNORM;
2829 snd_pcm_stream_unlock_irq(csubstream);
2830 if (ostate != SNDRV_PCM_STATE_RUNNING && runtime->oss.trigger) {
2831 struct snd_pcm_oss_file ofile;
2832 memset(&ofile, 0, sizeof(ofile));
2833 ofile.streams[SNDRV_PCM_STREAM_CAPTURE] = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
2834 runtime->oss.trigger = 0;
2835 snd_pcm_oss_set_trigger(&ofile, PCM_ENABLE_INPUT);
2842 static int snd_pcm_oss_mmap(struct file *file, struct vm_area_struct *area)
2844 struct snd_pcm_oss_file *pcm_oss_file;
2845 struct snd_pcm_substream *substream = NULL;
2846 struct snd_pcm_runtime *runtime;
2850 pr_debug("pcm_oss: mmap begin\n");
2852 pcm_oss_file = file->private_data;
2853 switch ((area->vm_flags & (VM_READ | VM_WRITE))) {
2854 case VM_READ | VM_WRITE:
2855 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
2860 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
2863 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
2868 /* set VM_READ access as well to fix memset() routines that do
2869 reads before writes (to improve performance) */
2870 area->vm_flags |= VM_READ;
2871 if (substream == NULL)
2873 runtime = substream->runtime;
2874 if (!(runtime->info & SNDRV_PCM_INFO_MMAP_VALID))
2876 if (runtime->info & SNDRV_PCM_INFO_INTERLEAVED)
2877 runtime->access = SNDRV_PCM_ACCESS_MMAP_INTERLEAVED;
2881 if (runtime->oss.params) {
2882 /* use mutex_trylock() for params_lock for avoiding a deadlock
2883 * between mmap_lock and params_lock taken by
2884 * copy_from/to_user() in snd_pcm_oss_write/read()
2886 err = snd_pcm_oss_change_params(substream, true);
2890 #ifdef CONFIG_SND_PCM_OSS_PLUGINS
2891 if (runtime->oss.plugin_first != NULL)
2895 if (area->vm_pgoff != 0)
2898 err = snd_pcm_mmap_data(substream, file, area);
2901 runtime->oss.mmap_bytes = area->vm_end - area->vm_start;
2902 runtime->silence_threshold = 0;
2903 runtime->silence_size = 0;
2905 pr_debug("pcm_oss: mmap ok, bytes = 0x%x\n",
2906 runtime->oss.mmap_bytes);
2908 /* In mmap mode we never stop */
2909 runtime->stop_threshold = runtime->boundary;
2914 #ifdef CONFIG_SND_VERBOSE_PROCFS
2919 static void snd_pcm_oss_proc_read(struct snd_info_entry *entry,
2920 struct snd_info_buffer *buffer)
2922 struct snd_pcm_str *pstr = entry->private_data;
2923 struct snd_pcm_oss_setup *setup = pstr->oss.setup_list;
2924 mutex_lock(&pstr->oss.setup_mutex);
2926 snd_iprintf(buffer, "%s %u %u%s%s%s%s%s%s\n",
2930 setup->disable ? " disable" : "",
2931 setup->direct ? " direct" : "",
2932 setup->block ? " block" : "",
2933 setup->nonblock ? " non-block" : "",
2934 setup->partialfrag ? " partial-frag" : "",
2935 setup->nosilence ? " no-silence" : "");
2936 setup = setup->next;
2938 mutex_unlock(&pstr->oss.setup_mutex);
2941 static void snd_pcm_oss_proc_free_setup_list(struct snd_pcm_str * pstr)
2943 struct snd_pcm_oss_setup *setup, *setupn;
2945 for (setup = pstr->oss.setup_list, pstr->oss.setup_list = NULL;
2946 setup; setup = setupn) {
2947 setupn = setup->next;
2948 kfree(setup->task_name);
2951 pstr->oss.setup_list = NULL;
2954 static void snd_pcm_oss_proc_write(struct snd_info_entry *entry,
2955 struct snd_info_buffer *buffer)
2957 struct snd_pcm_str *pstr = entry->private_data;
2958 char line[128], str[32], task_name[32];
2961 struct snd_pcm_oss_setup *setup, *setup1, template;
2963 while (!snd_info_get_line(buffer, line, sizeof(line))) {
2964 mutex_lock(&pstr->oss.setup_mutex);
2965 memset(&template, 0, sizeof(template));
2966 ptr = snd_info_get_str(task_name, line, sizeof(task_name));
2967 if (!strcmp(task_name, "clear") || !strcmp(task_name, "erase")) {
2968 snd_pcm_oss_proc_free_setup_list(pstr);
2969 mutex_unlock(&pstr->oss.setup_mutex);
2972 for (setup = pstr->oss.setup_list; setup; setup = setup->next) {
2973 if (!strcmp(setup->task_name, task_name)) {
2978 ptr = snd_info_get_str(str, ptr, sizeof(str));
2979 template.periods = simple_strtoul(str, NULL, 10);
2980 ptr = snd_info_get_str(str, ptr, sizeof(str));
2981 template.period_size = simple_strtoul(str, NULL, 10);
2982 for (idx1 = 31; idx1 >= 0; idx1--)
2983 if (template.period_size & (1 << idx1))
2985 for (idx1--; idx1 >= 0; idx1--)
2986 template.period_size &= ~(1 << idx1);
2988 ptr = snd_info_get_str(str, ptr, sizeof(str));
2989 if (!strcmp(str, "disable")) {
2990 template.disable = 1;
2991 } else if (!strcmp(str, "direct")) {
2992 template.direct = 1;
2993 } else if (!strcmp(str, "block")) {
2995 } else if (!strcmp(str, "non-block")) {
2996 template.nonblock = 1;
2997 } else if (!strcmp(str, "partial-frag")) {
2998 template.partialfrag = 1;
2999 } else if (!strcmp(str, "no-silence")) {
3000 template.nosilence = 1;
3001 } else if (!strcmp(str, "buggy-ptr")) {
3002 template.buggyptr = 1;
3005 if (setup == NULL) {
3006 setup = kmalloc(sizeof(*setup), GFP_KERNEL);
3008 buffer->error = -ENOMEM;
3009 mutex_unlock(&pstr->oss.setup_mutex);
3012 if (pstr->oss.setup_list == NULL)
3013 pstr->oss.setup_list = setup;
3015 for (setup1 = pstr->oss.setup_list;
3016 setup1->next; setup1 = setup1->next);
3017 setup1->next = setup;
3019 template.task_name = kstrdup(task_name, GFP_KERNEL);
3020 if (! template.task_name) {
3022 buffer->error = -ENOMEM;
3023 mutex_unlock(&pstr->oss.setup_mutex);
3028 mutex_unlock(&pstr->oss.setup_mutex);
3032 static void snd_pcm_oss_proc_init(struct snd_pcm *pcm)
3035 for (stream = 0; stream < 2; ++stream) {
3036 struct snd_info_entry *entry;
3037 struct snd_pcm_str *pstr = &pcm->streams[stream];
3038 if (pstr->substream_count == 0)
3040 if ((entry = snd_info_create_card_entry(pcm->card, "oss", pstr->proc_root)) != NULL) {
3041 entry->content = SNDRV_INFO_CONTENT_TEXT;
3042 entry->mode = S_IFREG | 0644;
3043 entry->c.text.read = snd_pcm_oss_proc_read;
3044 entry->c.text.write = snd_pcm_oss_proc_write;
3045 entry->private_data = pstr;
3046 if (snd_info_register(entry) < 0) {
3047 snd_info_free_entry(entry);
3051 pstr->oss.proc_entry = entry;
3055 static void snd_pcm_oss_proc_done(struct snd_pcm *pcm)
3058 for (stream = 0; stream < 2; ++stream) {
3059 struct snd_pcm_str *pstr = &pcm->streams[stream];
3060 snd_info_free_entry(pstr->oss.proc_entry);
3061 pstr->oss.proc_entry = NULL;
3062 snd_pcm_oss_proc_free_setup_list(pstr);
3065 #else /* !CONFIG_SND_VERBOSE_PROCFS */
3066 #define snd_pcm_oss_proc_init(pcm)
3067 #define snd_pcm_oss_proc_done(pcm)
3068 #endif /* CONFIG_SND_VERBOSE_PROCFS */
3074 static const struct file_operations snd_pcm_oss_f_reg =
3076 .owner = THIS_MODULE,
3077 .read = snd_pcm_oss_read,
3078 .write = snd_pcm_oss_write,
3079 .open = snd_pcm_oss_open,
3080 .release = snd_pcm_oss_release,
3081 .llseek = no_llseek,
3082 .poll = snd_pcm_oss_poll,
3083 .unlocked_ioctl = snd_pcm_oss_ioctl,
3084 .compat_ioctl = snd_pcm_oss_ioctl_compat,
3085 .mmap = snd_pcm_oss_mmap,
3088 static void register_oss_dsp(struct snd_pcm *pcm, int index)
3090 if (snd_register_oss_device(SNDRV_OSS_DEVICE_TYPE_PCM,
3091 pcm->card, index, &snd_pcm_oss_f_reg,
3093 pcm_err(pcm, "unable to register OSS PCM device %i:%i\n",
3094 pcm->card->number, pcm->device);
3098 static int snd_pcm_oss_register_minor(struct snd_pcm *pcm)
3101 if (dsp_map[pcm->card->number] == (int)pcm->device) {
3104 register_oss_dsp(pcm, 0);
3105 duplex = (pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream_count > 0 &&
3106 pcm->streams[SNDRV_PCM_STREAM_CAPTURE].substream_count &&
3107 !(pcm->info_flags & SNDRV_PCM_INFO_HALF_DUPLEX));
3108 sprintf(name, "%s%s", pcm->name, duplex ? " (DUPLEX)" : "");
3109 #ifdef SNDRV_OSS_INFO_DEV_AUDIO
3110 snd_oss_info_register(SNDRV_OSS_INFO_DEV_AUDIO,
3115 pcm->oss.reg_mask |= 1;
3117 if (adsp_map[pcm->card->number] == (int)pcm->device) {
3118 register_oss_dsp(pcm, 1);
3120 pcm->oss.reg_mask |= 2;
3124 snd_pcm_oss_proc_init(pcm);
3129 static int snd_pcm_oss_disconnect_minor(struct snd_pcm *pcm)
3132 if (pcm->oss.reg_mask & 1) {
3133 pcm->oss.reg_mask &= ~1;
3134 snd_unregister_oss_device(SNDRV_OSS_DEVICE_TYPE_PCM,
3137 if (pcm->oss.reg_mask & 2) {
3138 pcm->oss.reg_mask &= ~2;
3139 snd_unregister_oss_device(SNDRV_OSS_DEVICE_TYPE_PCM,
3142 if (dsp_map[pcm->card->number] == (int)pcm->device) {
3143 #ifdef SNDRV_OSS_INFO_DEV_AUDIO
3144 snd_oss_info_unregister(SNDRV_OSS_INFO_DEV_AUDIO, pcm->card->number);
3152 static int snd_pcm_oss_unregister_minor(struct snd_pcm *pcm)
3154 snd_pcm_oss_disconnect_minor(pcm);
3155 snd_pcm_oss_proc_done(pcm);
3159 static struct snd_pcm_notify snd_pcm_oss_notify =
3161 .n_register = snd_pcm_oss_register_minor,
3162 .n_disconnect = snd_pcm_oss_disconnect_minor,
3163 .n_unregister = snd_pcm_oss_unregister_minor,
3166 static int __init alsa_pcm_oss_init(void)
3171 /* check device map table */
3172 for (i = 0; i < SNDRV_CARDS; i++) {
3173 if (dsp_map[i] < 0 || dsp_map[i] >= SNDRV_PCM_DEVICES) {
3174 pr_err("ALSA: pcm_oss: invalid dsp_map[%d] = %d\n",
3178 if (adsp_map[i] < 0 || adsp_map[i] >= SNDRV_PCM_DEVICES) {
3179 pr_err("ALSA: pcm_oss: invalid adsp_map[%d] = %d\n",
3184 if ((err = snd_pcm_notify(&snd_pcm_oss_notify, 0)) < 0)
3189 static void __exit alsa_pcm_oss_exit(void)
3191 snd_pcm_notify(&snd_pcm_oss_notify, 1);
3194 module_init(alsa_pcm_oss_init)
3195 module_exit(alsa_pcm_oss_exit)