2 * Digital Audio (PCM) abstract layer / OSS compatible
3 * Copyright (c) by Jaroslav Kysela <perex@perex.cz>
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2 of the License, or
9 * (at your option) any later version.
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
16 * You should have received a copy of the GNU General Public License
17 * along with this program; if not, write to the Free Software
18 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
29 #include <linux/init.h>
30 #include <linux/slab.h>
31 #include <linux/time.h>
32 #include <linux/vmalloc.h>
33 #include <linux/module.h>
34 #include <linux/math64.h>
35 #include <linux/string.h>
36 #include <sound/core.h>
37 #include <sound/minors.h>
38 #include <sound/pcm.h>
39 #include <sound/pcm_params.h>
40 #include "pcm_plugin.h"
41 #include <sound/info.h>
42 #include <linux/soundcard.h>
43 #include <sound/initval.h>
44 #include <sound/mixer_oss.h>
46 #define OSS_ALSAEMULVER _SIOR ('M', 249, int)
48 static int dsp_map[SNDRV_CARDS];
49 static int adsp_map[SNDRV_CARDS] = {[0 ... (SNDRV_CARDS-1)] = 1};
50 static bool nonblock_open = 1;
52 MODULE_AUTHOR("Jaroslav Kysela <perex@perex.cz>, Abramo Bagnara <abramo@alsa-project.org>");
53 MODULE_DESCRIPTION("PCM OSS emulation for ALSA.");
54 MODULE_LICENSE("GPL");
55 module_param_array(dsp_map, int, NULL, 0444);
56 MODULE_PARM_DESC(dsp_map, "PCM device number assigned to 1st OSS device.");
57 module_param_array(adsp_map, int, NULL, 0444);
58 MODULE_PARM_DESC(adsp_map, "PCM device number assigned to 2nd OSS device.");
59 module_param(nonblock_open, bool, 0644);
60 MODULE_PARM_DESC(nonblock_open, "Don't block opening busy PCM devices.");
61 MODULE_ALIAS_SNDRV_MINOR(SNDRV_MINOR_OSS_PCM);
62 MODULE_ALIAS_SNDRV_MINOR(SNDRV_MINOR_OSS_PCM1);
64 static int snd_pcm_oss_get_rate(struct snd_pcm_oss_file *pcm_oss_file);
65 static int snd_pcm_oss_get_channels(struct snd_pcm_oss_file *pcm_oss_file);
66 static int snd_pcm_oss_get_format(struct snd_pcm_oss_file *pcm_oss_file);
68 static inline mm_segment_t snd_enter_user(void)
70 mm_segment_t fs = get_fs();
75 static inline void snd_leave_user(mm_segment_t fs)
81 * helper functions to process hw_params
83 static int snd_interval_refine_min(struct snd_interval *i, unsigned int min, int openmin)
90 } else if (i->min == min && !i->openmin && openmin) {
100 if (snd_interval_checkempty(i)) {
101 snd_interval_none(i);
107 static int snd_interval_refine_max(struct snd_interval *i, unsigned int max, int openmax)
112 i->openmax = openmax;
114 } else if (i->max == max && !i->openmax && openmax) {
124 if (snd_interval_checkempty(i)) {
125 snd_interval_none(i);
131 static int snd_interval_refine_set(struct snd_interval *i, unsigned int val)
133 struct snd_interval t;
136 t.openmin = t.openmax = 0;
138 return snd_interval_refine(i, &t);
142 * snd_pcm_hw_param_value_min
143 * @params: the hw_params instance
144 * @var: parameter to retrieve
145 * @dir: pointer to the direction (-1,0,1) or NULL
147 * Return the minimum value for field PAR.
150 snd_pcm_hw_param_value_min(const struct snd_pcm_hw_params *params,
151 snd_pcm_hw_param_t var, int *dir)
153 if (hw_is_mask(var)) {
156 return snd_mask_min(hw_param_mask_c(params, var));
158 if (hw_is_interval(var)) {
159 const struct snd_interval *i = hw_param_interval_c(params, var);
162 return snd_interval_min(i);
168 * snd_pcm_hw_param_value_max
169 * @params: the hw_params instance
170 * @var: parameter to retrieve
171 * @dir: pointer to the direction (-1,0,1) or NULL
173 * Return the maximum value for field PAR.
176 snd_pcm_hw_param_value_max(const struct snd_pcm_hw_params *params,
177 snd_pcm_hw_param_t var, int *dir)
179 if (hw_is_mask(var)) {
182 return snd_mask_max(hw_param_mask_c(params, var));
184 if (hw_is_interval(var)) {
185 const struct snd_interval *i = hw_param_interval_c(params, var);
187 *dir = - (int) i->openmax;
188 return snd_interval_max(i);
193 static int _snd_pcm_hw_param_mask(struct snd_pcm_hw_params *params,
194 snd_pcm_hw_param_t var,
195 const struct snd_mask *val)
198 changed = snd_mask_refine(hw_param_mask(params, var), val);
200 params->cmask |= 1 << var;
201 params->rmask |= 1 << var;
206 static int snd_pcm_hw_param_mask(struct snd_pcm_substream *pcm,
207 struct snd_pcm_hw_params *params,
208 snd_pcm_hw_param_t var,
209 const struct snd_mask *val)
211 int changed = _snd_pcm_hw_param_mask(params, var, val);
215 int err = snd_pcm_hw_refine(pcm, params);
222 static int _snd_pcm_hw_param_min(struct snd_pcm_hw_params *params,
223 snd_pcm_hw_param_t var, unsigned int val,
231 } else if (dir < 0) {
239 changed = snd_mask_refine_min(hw_param_mask(params, var),
241 else if (hw_is_interval(var))
242 changed = snd_interval_refine_min(hw_param_interval(params, var),
247 params->cmask |= 1 << var;
248 params->rmask |= 1 << var;
254 * snd_pcm_hw_param_min
256 * @params: the hw_params instance
257 * @var: parameter to retrieve
258 * @val: minimal value
259 * @dir: pointer to the direction (-1,0,1) or NULL
261 * Inside configuration space defined by PARAMS remove from PAR all
262 * values < VAL. Reduce configuration space accordingly.
263 * Return new minimum or -EINVAL if the configuration space is empty
265 static int snd_pcm_hw_param_min(struct snd_pcm_substream *pcm,
266 struct snd_pcm_hw_params *params,
267 snd_pcm_hw_param_t var, unsigned int val,
270 int changed = _snd_pcm_hw_param_min(params, var, val, dir ? *dir : 0);
274 int err = snd_pcm_hw_refine(pcm, params);
278 return snd_pcm_hw_param_value_min(params, var, dir);
281 static int _snd_pcm_hw_param_max(struct snd_pcm_hw_params *params,
282 snd_pcm_hw_param_t var, unsigned int val,
290 } else if (dir > 0) {
295 if (hw_is_mask(var)) {
296 if (val == 0 && open) {
297 snd_mask_none(hw_param_mask(params, var));
300 changed = snd_mask_refine_max(hw_param_mask(params, var),
302 } else if (hw_is_interval(var))
303 changed = snd_interval_refine_max(hw_param_interval(params, var),
308 params->cmask |= 1 << var;
309 params->rmask |= 1 << var;
315 * snd_pcm_hw_param_max
317 * @params: the hw_params instance
318 * @var: parameter to retrieve
319 * @val: maximal value
320 * @dir: pointer to the direction (-1,0,1) or NULL
322 * Inside configuration space defined by PARAMS remove from PAR all
323 * values >= VAL + 1. Reduce configuration space accordingly.
324 * Return new maximum or -EINVAL if the configuration space is empty
326 static int snd_pcm_hw_param_max(struct snd_pcm_substream *pcm,
327 struct snd_pcm_hw_params *params,
328 snd_pcm_hw_param_t var, unsigned int val,
331 int changed = _snd_pcm_hw_param_max(params, var, val, dir ? *dir : 0);
335 int err = snd_pcm_hw_refine(pcm, params);
339 return snd_pcm_hw_param_value_max(params, var, dir);
342 static int boundary_sub(int a, int adir,
346 adir = adir < 0 ? -1 : (adir > 0 ? 1 : 0);
347 bdir = bdir < 0 ? -1 : (bdir > 0 ? 1 : 0);
352 } else if (*cdir == 2) {
358 static int boundary_lt(unsigned int a, int adir,
359 unsigned int b, int bdir)
371 return a < b || (a == b && adir < bdir);
374 /* Return 1 if min is nearer to best than max */
375 static int boundary_nearer(int min, int mindir,
376 int best, int bestdir,
381 boundary_sub(best, bestdir, min, mindir, &dmin, &dmindir);
382 boundary_sub(max, maxdir, best, bestdir, &dmax, &dmaxdir);
383 return boundary_lt(dmin, dmindir, dmax, dmaxdir);
387 * snd_pcm_hw_param_near
389 * @params: the hw_params instance
390 * @var: parameter to retrieve
391 * @best: value to set
392 * @dir: pointer to the direction (-1,0,1) or NULL
394 * Inside configuration space defined by PARAMS set PAR to the available value
395 * nearest to VAL. Reduce configuration space accordingly.
396 * This function cannot be called for SNDRV_PCM_HW_PARAM_ACCESS,
397 * SNDRV_PCM_HW_PARAM_FORMAT, SNDRV_PCM_HW_PARAM_SUBFORMAT.
398 * Return the value found.
400 static int snd_pcm_hw_param_near(struct snd_pcm_substream *pcm,
401 struct snd_pcm_hw_params *params,
402 snd_pcm_hw_param_t var, unsigned int best,
405 struct snd_pcm_hw_params *save = NULL;
407 unsigned int saved_min;
411 int valdir = dir ? *dir : 0;
416 mindir = maxdir = valdir;
419 else if (maxdir == 0)
425 save = kmalloc(sizeof(*save), GFP_KERNEL);
430 min = snd_pcm_hw_param_min(pcm, params, var, min, &mindir);
432 struct snd_pcm_hw_params *params1;
435 if ((unsigned int)min == saved_min && mindir == valdir)
437 params1 = kmalloc(sizeof(*params1), GFP_KERNEL);
438 if (params1 == NULL) {
443 max = snd_pcm_hw_param_max(pcm, params1, var, max, &maxdir);
448 if (boundary_nearer(max, maxdir, best, valdir, min, mindir)) {
455 max = snd_pcm_hw_param_max(pcm, params, var, max, &maxdir);
465 v = snd_pcm_hw_param_last(pcm, params, var, dir);
467 v = snd_pcm_hw_param_first(pcm, params, var, dir);
472 static int _snd_pcm_hw_param_set(struct snd_pcm_hw_params *params,
473 snd_pcm_hw_param_t var, unsigned int val,
477 if (hw_is_mask(var)) {
478 struct snd_mask *m = hw_param_mask(params, var);
479 if (val == 0 && dir < 0) {
487 changed = snd_mask_refine_set(hw_param_mask(params, var), val);
489 } else if (hw_is_interval(var)) {
490 struct snd_interval *i = hw_param_interval(params, var);
491 if (val == 0 && dir < 0) {
493 snd_interval_none(i);
495 changed = snd_interval_refine_set(i, val);
497 struct snd_interval t;
509 changed = snd_interval_refine(i, &t);
514 params->cmask |= 1 << var;
515 params->rmask |= 1 << var;
521 * snd_pcm_hw_param_set
523 * @params: the hw_params instance
524 * @var: parameter to retrieve
526 * @dir: pointer to the direction (-1,0,1) or NULL
528 * Inside configuration space defined by PARAMS remove from PAR all
529 * values != VAL. Reduce configuration space accordingly.
530 * Return VAL or -EINVAL if the configuration space is empty
532 static int snd_pcm_hw_param_set(struct snd_pcm_substream *pcm,
533 struct snd_pcm_hw_params *params,
534 snd_pcm_hw_param_t var, unsigned int val,
537 int changed = _snd_pcm_hw_param_set(params, var, val, dir);
541 int err = snd_pcm_hw_refine(pcm, params);
545 return snd_pcm_hw_param_value(params, var, NULL);
548 static int _snd_pcm_hw_param_setinteger(struct snd_pcm_hw_params *params,
549 snd_pcm_hw_param_t var)
552 changed = snd_interval_setinteger(hw_param_interval(params, var));
554 params->cmask |= 1 << var;
555 params->rmask |= 1 << var;
564 #ifdef CONFIG_SND_PCM_OSS_PLUGINS
565 static int snd_pcm_oss_plugin_clear(struct snd_pcm_substream *substream)
567 struct snd_pcm_runtime *runtime = substream->runtime;
568 struct snd_pcm_plugin *plugin, *next;
570 plugin = runtime->oss.plugin_first;
573 snd_pcm_plugin_free(plugin);
576 runtime->oss.plugin_first = runtime->oss.plugin_last = NULL;
580 static int snd_pcm_plugin_insert(struct snd_pcm_plugin *plugin)
582 struct snd_pcm_runtime *runtime = plugin->plug->runtime;
583 plugin->next = runtime->oss.plugin_first;
585 if (runtime->oss.plugin_first) {
586 runtime->oss.plugin_first->prev = plugin;
587 runtime->oss.plugin_first = plugin;
589 runtime->oss.plugin_last =
590 runtime->oss.plugin_first = plugin;
595 int snd_pcm_plugin_append(struct snd_pcm_plugin *plugin)
597 struct snd_pcm_runtime *runtime = plugin->plug->runtime;
599 plugin->prev = runtime->oss.plugin_last;
600 if (runtime->oss.plugin_last) {
601 runtime->oss.plugin_last->next = plugin;
602 runtime->oss.plugin_last = plugin;
604 runtime->oss.plugin_last =
605 runtime->oss.plugin_first = plugin;
609 #endif /* CONFIG_SND_PCM_OSS_PLUGINS */
611 static long snd_pcm_oss_bytes(struct snd_pcm_substream *substream, long frames)
613 struct snd_pcm_runtime *runtime = substream->runtime;
614 long buffer_size = snd_pcm_lib_buffer_bytes(substream);
615 long bytes = frames_to_bytes(runtime, frames);
616 if (buffer_size == runtime->oss.buffer_bytes)
618 #if BITS_PER_LONG >= 64
619 return runtime->oss.buffer_bytes * bytes / buffer_size;
622 u64 bsize = (u64)runtime->oss.buffer_bytes * (u64)bytes;
623 return div_u64(bsize, buffer_size);
628 static long snd_pcm_alsa_frames(struct snd_pcm_substream *substream, long bytes)
630 struct snd_pcm_runtime *runtime = substream->runtime;
631 long buffer_size = snd_pcm_lib_buffer_bytes(substream);
632 if (buffer_size == runtime->oss.buffer_bytes)
633 return bytes_to_frames(runtime, bytes);
634 return bytes_to_frames(runtime, (buffer_size * bytes) / runtime->oss.buffer_bytes);
638 snd_pcm_uframes_t get_hw_ptr_period(struct snd_pcm_runtime *runtime)
640 return runtime->hw_ptr_interrupt;
643 /* define extended formats in the recent OSS versions (if any) */
645 #define AFMT_S32_LE 0x00001000
646 #define AFMT_S32_BE 0x00002000
647 #define AFMT_S24_LE 0x00008000
648 #define AFMT_S24_BE 0x00010000
649 #define AFMT_S24_PACKED 0x00040000
651 /* other supported formats */
652 #define AFMT_FLOAT 0x00004000
653 #define AFMT_SPDIF_RAW 0x00020000
655 /* unsupported formats */
656 #define AFMT_AC3 0x00000400
657 #define AFMT_VORBIS 0x00000800
659 static snd_pcm_format_t snd_pcm_oss_format_from(int format)
662 case AFMT_MU_LAW: return SNDRV_PCM_FORMAT_MU_LAW;
663 case AFMT_A_LAW: return SNDRV_PCM_FORMAT_A_LAW;
664 case AFMT_IMA_ADPCM: return SNDRV_PCM_FORMAT_IMA_ADPCM;
665 case AFMT_U8: return SNDRV_PCM_FORMAT_U8;
666 case AFMT_S16_LE: return SNDRV_PCM_FORMAT_S16_LE;
667 case AFMT_S16_BE: return SNDRV_PCM_FORMAT_S16_BE;
668 case AFMT_S8: return SNDRV_PCM_FORMAT_S8;
669 case AFMT_U16_LE: return SNDRV_PCM_FORMAT_U16_LE;
670 case AFMT_U16_BE: return SNDRV_PCM_FORMAT_U16_BE;
671 case AFMT_MPEG: return SNDRV_PCM_FORMAT_MPEG;
672 case AFMT_S32_LE: return SNDRV_PCM_FORMAT_S32_LE;
673 case AFMT_S32_BE: return SNDRV_PCM_FORMAT_S32_BE;
674 case AFMT_S24_LE: return SNDRV_PCM_FORMAT_S24_LE;
675 case AFMT_S24_BE: return SNDRV_PCM_FORMAT_S24_BE;
676 case AFMT_S24_PACKED: return SNDRV_PCM_FORMAT_S24_3LE;
677 case AFMT_FLOAT: return SNDRV_PCM_FORMAT_FLOAT;
678 case AFMT_SPDIF_RAW: return SNDRV_PCM_FORMAT_IEC958_SUBFRAME;
679 default: return SNDRV_PCM_FORMAT_U8;
683 static int snd_pcm_oss_format_to(snd_pcm_format_t format)
686 case SNDRV_PCM_FORMAT_MU_LAW: return AFMT_MU_LAW;
687 case SNDRV_PCM_FORMAT_A_LAW: return AFMT_A_LAW;
688 case SNDRV_PCM_FORMAT_IMA_ADPCM: return AFMT_IMA_ADPCM;
689 case SNDRV_PCM_FORMAT_U8: return AFMT_U8;
690 case SNDRV_PCM_FORMAT_S16_LE: return AFMT_S16_LE;
691 case SNDRV_PCM_FORMAT_S16_BE: return AFMT_S16_BE;
692 case SNDRV_PCM_FORMAT_S8: return AFMT_S8;
693 case SNDRV_PCM_FORMAT_U16_LE: return AFMT_U16_LE;
694 case SNDRV_PCM_FORMAT_U16_BE: return AFMT_U16_BE;
695 case SNDRV_PCM_FORMAT_MPEG: return AFMT_MPEG;
696 case SNDRV_PCM_FORMAT_S32_LE: return AFMT_S32_LE;
697 case SNDRV_PCM_FORMAT_S32_BE: return AFMT_S32_BE;
698 case SNDRV_PCM_FORMAT_S24_LE: return AFMT_S24_LE;
699 case SNDRV_PCM_FORMAT_S24_BE: return AFMT_S24_BE;
700 case SNDRV_PCM_FORMAT_S24_3LE: return AFMT_S24_PACKED;
701 case SNDRV_PCM_FORMAT_FLOAT: return AFMT_FLOAT;
702 case SNDRV_PCM_FORMAT_IEC958_SUBFRAME: return AFMT_SPDIF_RAW;
703 default: return -EINVAL;
707 static int snd_pcm_oss_period_size(struct snd_pcm_substream *substream,
708 struct snd_pcm_hw_params *oss_params,
709 struct snd_pcm_hw_params *slave_params)
712 size_t oss_buffer_size, oss_period_size, oss_periods;
713 size_t min_period_size, max_period_size;
714 struct snd_pcm_runtime *runtime = substream->runtime;
715 size_t oss_frame_size;
717 oss_frame_size = snd_pcm_format_physical_width(params_format(oss_params)) *
718 params_channels(oss_params) / 8;
720 oss_buffer_size = snd_pcm_plug_client_size(substream,
721 snd_pcm_hw_param_value_max(slave_params, SNDRV_PCM_HW_PARAM_BUFFER_SIZE, NULL)) * oss_frame_size;
722 oss_buffer_size = rounddown_pow_of_two(oss_buffer_size);
723 if (atomic_read(&substream->mmap_count)) {
724 if (oss_buffer_size > runtime->oss.mmap_bytes)
725 oss_buffer_size = runtime->oss.mmap_bytes;
728 if (substream->oss.setup.period_size > 16)
729 oss_period_size = substream->oss.setup.period_size;
730 else if (runtime->oss.fragshift) {
731 oss_period_size = 1 << runtime->oss.fragshift;
732 if (oss_period_size > oss_buffer_size / 2)
733 oss_period_size = oss_buffer_size / 2;
736 size_t bytes_per_sec = params_rate(oss_params) * snd_pcm_format_physical_width(params_format(oss_params)) * params_channels(oss_params) / 8;
738 oss_period_size = oss_buffer_size;
740 oss_period_size /= 2;
741 } while (oss_period_size > bytes_per_sec);
742 if (runtime->oss.subdivision == 0) {
744 if (oss_period_size / sd > 4096)
746 if (oss_period_size / sd < 4096)
749 sd = runtime->oss.subdivision;
750 oss_period_size /= sd;
751 if (oss_period_size < 16)
752 oss_period_size = 16;
755 min_period_size = snd_pcm_plug_client_size(substream,
756 snd_pcm_hw_param_value_min(slave_params, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, NULL));
757 min_period_size *= oss_frame_size;
758 min_period_size = roundup_pow_of_two(min_period_size);
759 if (oss_period_size < min_period_size)
760 oss_period_size = min_period_size;
762 max_period_size = snd_pcm_plug_client_size(substream,
763 snd_pcm_hw_param_value_max(slave_params, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, NULL));
764 max_period_size *= oss_frame_size;
765 max_period_size = rounddown_pow_of_two(max_period_size);
766 if (oss_period_size > max_period_size)
767 oss_period_size = max_period_size;
769 oss_periods = oss_buffer_size / oss_period_size;
771 if (substream->oss.setup.periods > 1)
772 oss_periods = substream->oss.setup.periods;
774 s = snd_pcm_hw_param_value_max(slave_params, SNDRV_PCM_HW_PARAM_PERIODS, NULL);
775 if (runtime->oss.maxfrags && s > runtime->oss.maxfrags)
776 s = runtime->oss.maxfrags;
780 s = snd_pcm_hw_param_value_min(slave_params, SNDRV_PCM_HW_PARAM_PERIODS, NULL);
786 while (oss_period_size * oss_periods > oss_buffer_size)
787 oss_period_size /= 2;
789 if (oss_period_size < 16)
791 runtime->oss.period_bytes = oss_period_size;
792 runtime->oss.period_frames = 1;
793 runtime->oss.periods = oss_periods;
797 static int choose_rate(struct snd_pcm_substream *substream,
798 struct snd_pcm_hw_params *params, unsigned int best_rate)
800 struct snd_interval *it;
801 struct snd_pcm_hw_params *save;
802 unsigned int rate, prev;
804 save = kmalloc(sizeof(*save), GFP_KERNEL);
808 it = hw_param_interval(save, SNDRV_PCM_HW_PARAM_RATE);
810 /* try multiples of the best rate */
813 if (it->max < rate || (it->max == rate && it->openmax))
815 if (it->min < rate || (it->min == rate && !it->openmin)) {
817 ret = snd_pcm_hw_param_set(substream, params,
818 SNDRV_PCM_HW_PARAM_RATE,
820 if (ret == (int)rate) {
832 /* not found, use the nearest rate */
834 return snd_pcm_hw_param_near(substream, params, SNDRV_PCM_HW_PARAM_RATE, best_rate, NULL);
837 static int snd_pcm_oss_change_params(struct snd_pcm_substream *substream)
839 struct snd_pcm_runtime *runtime = substream->runtime;
840 struct snd_pcm_hw_params *params, *sparams;
841 struct snd_pcm_sw_params *sw_params;
842 ssize_t oss_buffer_size, oss_period_size;
843 size_t oss_frame_size;
846 snd_pcm_format_t format, sformat;
848 struct snd_mask sformat_mask;
849 struct snd_mask mask;
851 if (mutex_lock_interruptible(&runtime->oss.params_lock))
853 sw_params = kmalloc(sizeof(*sw_params), GFP_KERNEL);
854 params = kmalloc(sizeof(*params), GFP_KERNEL);
855 sparams = kmalloc(sizeof(*sparams), GFP_KERNEL);
856 if (!sw_params || !params || !sparams) {
861 if (atomic_read(&substream->mmap_count))
864 direct = substream->oss.setup.direct;
866 _snd_pcm_hw_params_any(sparams);
867 _snd_pcm_hw_param_setinteger(sparams, SNDRV_PCM_HW_PARAM_PERIODS);
868 _snd_pcm_hw_param_min(sparams, SNDRV_PCM_HW_PARAM_PERIODS, 2, 0);
869 snd_mask_none(&mask);
870 if (atomic_read(&substream->mmap_count))
871 snd_mask_set(&mask, (__force int)SNDRV_PCM_ACCESS_MMAP_INTERLEAVED);
873 snd_mask_set(&mask, (__force int)SNDRV_PCM_ACCESS_RW_INTERLEAVED);
875 snd_mask_set(&mask, (__force int)SNDRV_PCM_ACCESS_RW_NONINTERLEAVED);
877 err = snd_pcm_hw_param_mask(substream, sparams, SNDRV_PCM_HW_PARAM_ACCESS, &mask);
879 pcm_dbg(substream->pcm, "No usable accesses\n");
883 choose_rate(substream, sparams, runtime->oss.rate);
884 snd_pcm_hw_param_near(substream, sparams, SNDRV_PCM_HW_PARAM_CHANNELS, runtime->oss.channels, NULL);
886 format = snd_pcm_oss_format_from(runtime->oss.format);
888 sformat_mask = *hw_param_mask(sparams, SNDRV_PCM_HW_PARAM_FORMAT);
892 sformat = snd_pcm_plug_slave_format(format, &sformat_mask);
894 if ((__force int)sformat < 0 ||
895 !snd_mask_test(&sformat_mask, (__force int)sformat)) {
896 for (sformat = (__force snd_pcm_format_t)0;
897 (__force int)sformat <= (__force int)SNDRV_PCM_FORMAT_LAST;
898 sformat = (__force snd_pcm_format_t)((__force int)sformat + 1)) {
899 if (snd_mask_test(&sformat_mask, (__force int)sformat) &&
900 snd_pcm_oss_format_to(sformat) >= 0)
903 if ((__force int)sformat > (__force int)SNDRV_PCM_FORMAT_LAST) {
904 pcm_dbg(substream->pcm, "Cannot find a format!!!\n");
909 err = _snd_pcm_hw_param_set(sparams, SNDRV_PCM_HW_PARAM_FORMAT, (__force int)sformat, 0);
914 memcpy(params, sparams, sizeof(*params));
916 _snd_pcm_hw_params_any(params);
917 _snd_pcm_hw_param_set(params, SNDRV_PCM_HW_PARAM_ACCESS,
918 (__force int)SNDRV_PCM_ACCESS_RW_INTERLEAVED, 0);
919 _snd_pcm_hw_param_set(params, SNDRV_PCM_HW_PARAM_FORMAT,
920 (__force int)snd_pcm_oss_format_from(runtime->oss.format), 0);
921 _snd_pcm_hw_param_set(params, SNDRV_PCM_HW_PARAM_CHANNELS,
922 runtime->oss.channels, 0);
923 _snd_pcm_hw_param_set(params, SNDRV_PCM_HW_PARAM_RATE,
924 runtime->oss.rate, 0);
925 pdprintf("client: access = %i, format = %i, channels = %i, rate = %i\n",
926 params_access(params), params_format(params),
927 params_channels(params), params_rate(params));
929 pdprintf("slave: access = %i, format = %i, channels = %i, rate = %i\n",
930 params_access(sparams), params_format(sparams),
931 params_channels(sparams), params_rate(sparams));
933 oss_frame_size = snd_pcm_format_physical_width(params_format(params)) *
934 params_channels(params) / 8;
936 #ifdef CONFIG_SND_PCM_OSS_PLUGINS
937 snd_pcm_oss_plugin_clear(substream);
939 /* add necessary plugins */
940 snd_pcm_oss_plugin_clear(substream);
941 if ((err = snd_pcm_plug_format_plugins(substream,
944 pcm_dbg(substream->pcm,
945 "snd_pcm_plug_format_plugins failed: %i\n", err);
946 snd_pcm_oss_plugin_clear(substream);
949 if (runtime->oss.plugin_first) {
950 struct snd_pcm_plugin *plugin;
951 if ((err = snd_pcm_plugin_build_io(substream, sparams, &plugin)) < 0) {
952 pcm_dbg(substream->pcm,
953 "snd_pcm_plugin_build_io failed: %i\n", err);
954 snd_pcm_oss_plugin_clear(substream);
957 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
958 err = snd_pcm_plugin_append(plugin);
960 err = snd_pcm_plugin_insert(plugin);
963 snd_pcm_oss_plugin_clear(substream);
970 err = snd_pcm_oss_period_size(substream, params, sparams);
974 n = snd_pcm_plug_slave_size(substream, runtime->oss.period_bytes / oss_frame_size);
975 err = snd_pcm_hw_param_near(substream, sparams, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, n, NULL);
979 err = snd_pcm_hw_param_near(substream, sparams, SNDRV_PCM_HW_PARAM_PERIODS,
980 runtime->oss.periods, NULL);
984 snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DROP, NULL);
986 if ((err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_HW_PARAMS, sparams)) < 0) {
987 pcm_dbg(substream->pcm, "HW_PARAMS failed: %i\n", err);
991 memset(sw_params, 0, sizeof(*sw_params));
992 if (runtime->oss.trigger) {
993 sw_params->start_threshold = 1;
995 sw_params->start_threshold = runtime->boundary;
997 if (atomic_read(&substream->mmap_count) ||
998 substream->stream == SNDRV_PCM_STREAM_CAPTURE)
999 sw_params->stop_threshold = runtime->boundary;
1001 sw_params->stop_threshold = runtime->buffer_size;
1002 sw_params->tstamp_mode = SNDRV_PCM_TSTAMP_NONE;
1003 sw_params->period_step = 1;
1004 sw_params->avail_min = substream->stream == SNDRV_PCM_STREAM_PLAYBACK ?
1005 1 : runtime->period_size;
1006 if (atomic_read(&substream->mmap_count) ||
1007 substream->oss.setup.nosilence) {
1008 sw_params->silence_threshold = 0;
1009 sw_params->silence_size = 0;
1011 snd_pcm_uframes_t frames;
1012 frames = runtime->period_size + 16;
1013 if (frames > runtime->buffer_size)
1014 frames = runtime->buffer_size;
1015 sw_params->silence_threshold = frames;
1016 sw_params->silence_size = frames;
1019 if ((err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_SW_PARAMS, sw_params)) < 0) {
1020 pcm_dbg(substream->pcm, "SW_PARAMS failed: %i\n", err);
1024 runtime->oss.periods = params_periods(sparams);
1025 oss_period_size = snd_pcm_plug_client_size(substream, params_period_size(sparams));
1026 if (oss_period_size < 0) {
1030 #ifdef CONFIG_SND_PCM_OSS_PLUGINS
1031 if (runtime->oss.plugin_first) {
1032 err = snd_pcm_plug_alloc(substream, oss_period_size);
1037 oss_period_size *= oss_frame_size;
1039 oss_buffer_size = oss_period_size * runtime->oss.periods;
1040 if (oss_buffer_size < 0) {
1045 runtime->oss.period_bytes = oss_period_size;
1046 runtime->oss.buffer_bytes = oss_buffer_size;
1048 pdprintf("oss: period bytes = %i, buffer bytes = %i\n",
1049 runtime->oss.period_bytes,
1050 runtime->oss.buffer_bytes);
1051 pdprintf("slave: period_size = %i, buffer_size = %i\n",
1052 params_period_size(sparams),
1053 params_buffer_size(sparams));
1055 runtime->oss.format = snd_pcm_oss_format_to(params_format(params));
1056 runtime->oss.channels = params_channels(params);
1057 runtime->oss.rate = params_rate(params);
1059 vfree(runtime->oss.buffer);
1060 runtime->oss.buffer = vmalloc(runtime->oss.period_bytes);
1061 if (!runtime->oss.buffer) {
1066 runtime->oss.params = 0;
1067 runtime->oss.prepare = 1;
1068 runtime->oss.buffer_used = 0;
1069 if (runtime->dma_area)
1070 snd_pcm_format_set_silence(runtime->format, runtime->dma_area, bytes_to_samples(runtime, runtime->dma_bytes));
1072 runtime->oss.period_frames = snd_pcm_alsa_frames(substream, oss_period_size);
1079 mutex_unlock(&runtime->oss.params_lock);
1083 static int snd_pcm_oss_get_active_substream(struct snd_pcm_oss_file *pcm_oss_file, struct snd_pcm_substream **r_substream)
1086 struct snd_pcm_substream *asubstream = NULL, *substream;
1088 for (idx = 0; idx < 2; idx++) {
1089 substream = pcm_oss_file->streams[idx];
1090 if (substream == NULL)
1092 if (asubstream == NULL)
1093 asubstream = substream;
1094 if (substream->runtime->oss.params) {
1095 err = snd_pcm_oss_change_params(substream);
1103 *r_substream = asubstream;
1107 static int snd_pcm_oss_prepare(struct snd_pcm_substream *substream)
1110 struct snd_pcm_runtime *runtime = substream->runtime;
1112 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_PREPARE, NULL);
1114 pcm_dbg(substream->pcm,
1115 "snd_pcm_oss_prepare: SNDRV_PCM_IOCTL_PREPARE failed\n");
1118 runtime->oss.prepare = 0;
1119 runtime->oss.prev_hw_ptr_period = 0;
1120 runtime->oss.period_ptr = 0;
1121 runtime->oss.buffer_used = 0;
1126 static int snd_pcm_oss_make_ready(struct snd_pcm_substream *substream)
1128 struct snd_pcm_runtime *runtime;
1131 if (substream == NULL)
1133 runtime = substream->runtime;
1134 if (runtime->oss.params) {
1135 err = snd_pcm_oss_change_params(substream);
1139 if (runtime->oss.prepare) {
1140 err = snd_pcm_oss_prepare(substream);
1147 static int snd_pcm_oss_capture_position_fixup(struct snd_pcm_substream *substream, snd_pcm_sframes_t *delay)
1149 struct snd_pcm_runtime *runtime;
1150 snd_pcm_uframes_t frames;
1154 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DELAY, delay);
1157 runtime = substream->runtime;
1158 if (*delay <= (snd_pcm_sframes_t)runtime->buffer_size)
1160 /* in case of overrun, skip whole periods like OSS/Linux driver does */
1161 /* until avail(delay) <= buffer_size */
1162 frames = (*delay - runtime->buffer_size) + runtime->period_size - 1;
1163 frames /= runtime->period_size;
1164 frames *= runtime->period_size;
1165 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_FORWARD, &frames);
1172 snd_pcm_sframes_t snd_pcm_oss_write3(struct snd_pcm_substream *substream, const char *ptr, snd_pcm_uframes_t frames, int in_kernel)
1174 struct snd_pcm_runtime *runtime = substream->runtime;
1177 if (runtime->status->state == SNDRV_PCM_STATE_XRUN ||
1178 runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) {
1180 pcm_dbg(substream->pcm,
1181 "pcm_oss: write: recovering from %s\n",
1182 runtime->status->state == SNDRV_PCM_STATE_XRUN ?
1183 "XRUN" : "SUSPEND");
1185 ret = snd_pcm_oss_prepare(substream);
1191 fs = snd_enter_user();
1192 ret = snd_pcm_lib_write(substream, (void __force __user *)ptr, frames);
1195 ret = snd_pcm_lib_write(substream, (void __force __user *)ptr, frames);
1197 if (ret != -EPIPE && ret != -ESTRPIPE)
1199 /* test, if we can't store new data, because the stream */
1200 /* has not been started */
1201 if (runtime->status->state == SNDRV_PCM_STATE_PREPARED)
1207 snd_pcm_sframes_t snd_pcm_oss_read3(struct snd_pcm_substream *substream, char *ptr, snd_pcm_uframes_t frames, int in_kernel)
1209 struct snd_pcm_runtime *runtime = substream->runtime;
1210 snd_pcm_sframes_t delay;
1213 if (runtime->status->state == SNDRV_PCM_STATE_XRUN ||
1214 runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) {
1216 pcm_dbg(substream->pcm,
1217 "pcm_oss: read: recovering from %s\n",
1218 runtime->status->state == SNDRV_PCM_STATE_XRUN ?
1219 "XRUN" : "SUSPEND");
1221 ret = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DRAIN, NULL);
1224 } else if (runtime->status->state == SNDRV_PCM_STATE_SETUP) {
1225 ret = snd_pcm_oss_prepare(substream);
1229 ret = snd_pcm_oss_capture_position_fixup(substream, &delay);
1234 fs = snd_enter_user();
1235 ret = snd_pcm_lib_read(substream, (void __force __user *)ptr, frames);
1238 ret = snd_pcm_lib_read(substream, (void __force __user *)ptr, frames);
1240 if (ret == -EPIPE) {
1241 if (runtime->status->state == SNDRV_PCM_STATE_DRAINING) {
1242 ret = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DROP, NULL);
1248 if (ret != -ESTRPIPE)
1254 snd_pcm_sframes_t snd_pcm_oss_writev3(struct snd_pcm_substream *substream, void **bufs, snd_pcm_uframes_t frames, int in_kernel)
1256 struct snd_pcm_runtime *runtime = substream->runtime;
1259 if (runtime->status->state == SNDRV_PCM_STATE_XRUN ||
1260 runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) {
1262 pcm_dbg(substream->pcm,
1263 "pcm_oss: writev: recovering from %s\n",
1264 runtime->status->state == SNDRV_PCM_STATE_XRUN ?
1265 "XRUN" : "SUSPEND");
1267 ret = snd_pcm_oss_prepare(substream);
1273 fs = snd_enter_user();
1274 ret = snd_pcm_lib_writev(substream, (void __user **)bufs, frames);
1277 ret = snd_pcm_lib_writev(substream, (void __user **)bufs, frames);
1279 if (ret != -EPIPE && ret != -ESTRPIPE)
1282 /* test, if we can't store new data, because the stream */
1283 /* has not been started */
1284 if (runtime->status->state == SNDRV_PCM_STATE_PREPARED)
1290 snd_pcm_sframes_t snd_pcm_oss_readv3(struct snd_pcm_substream *substream, void **bufs, snd_pcm_uframes_t frames, int in_kernel)
1292 struct snd_pcm_runtime *runtime = substream->runtime;
1295 if (runtime->status->state == SNDRV_PCM_STATE_XRUN ||
1296 runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) {
1298 pcm_dbg(substream->pcm,
1299 "pcm_oss: readv: recovering from %s\n",
1300 runtime->status->state == SNDRV_PCM_STATE_XRUN ?
1301 "XRUN" : "SUSPEND");
1303 ret = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DRAIN, NULL);
1306 } else if (runtime->status->state == SNDRV_PCM_STATE_SETUP) {
1307 ret = snd_pcm_oss_prepare(substream);
1313 fs = snd_enter_user();
1314 ret = snd_pcm_lib_readv(substream, (void __user **)bufs, frames);
1317 ret = snd_pcm_lib_readv(substream, (void __user **)bufs, frames);
1319 if (ret != -EPIPE && ret != -ESTRPIPE)
1325 static ssize_t snd_pcm_oss_write2(struct snd_pcm_substream *substream, const char *buf, size_t bytes, int in_kernel)
1327 struct snd_pcm_runtime *runtime = substream->runtime;
1328 snd_pcm_sframes_t frames, frames1;
1329 #ifdef CONFIG_SND_PCM_OSS_PLUGINS
1330 if (runtime->oss.plugin_first) {
1331 struct snd_pcm_plugin_channel *channels;
1332 size_t oss_frame_bytes = (runtime->oss.plugin_first->src_width * runtime->oss.plugin_first->src_format.channels) / 8;
1334 if (copy_from_user(runtime->oss.buffer, (const char __force __user *)buf, bytes))
1336 buf = runtime->oss.buffer;
1338 frames = bytes / oss_frame_bytes;
1339 frames1 = snd_pcm_plug_client_channels_buf(substream, (char *)buf, frames, &channels);
1342 frames1 = snd_pcm_plug_write_transfer(substream, channels, frames1);
1345 bytes = frames1 * oss_frame_bytes;
1349 frames = bytes_to_frames(runtime, bytes);
1350 frames1 = snd_pcm_oss_write3(substream, buf, frames, in_kernel);
1353 bytes = frames_to_bytes(runtime, frames1);
1358 static ssize_t snd_pcm_oss_write1(struct snd_pcm_substream *substream, const char __user *buf, size_t bytes)
1362 struct snd_pcm_runtime *runtime = substream->runtime;
1364 if (atomic_read(&substream->mmap_count))
1367 if ((tmp = snd_pcm_oss_make_ready(substream)) < 0)
1369 mutex_lock(&runtime->oss.params_lock);
1371 if (bytes < runtime->oss.period_bytes || runtime->oss.buffer_used > 0) {
1373 if (tmp + runtime->oss.buffer_used > runtime->oss.period_bytes)
1374 tmp = runtime->oss.period_bytes - runtime->oss.buffer_used;
1376 if (copy_from_user(runtime->oss.buffer + runtime->oss.buffer_used, buf, tmp)) {
1381 runtime->oss.buffer_used += tmp;
1385 if (substream->oss.setup.partialfrag ||
1386 runtime->oss.buffer_used == runtime->oss.period_bytes) {
1387 tmp = snd_pcm_oss_write2(substream, runtime->oss.buffer + runtime->oss.period_ptr,
1388 runtime->oss.buffer_used - runtime->oss.period_ptr, 1);
1391 runtime->oss.bytes += tmp;
1392 runtime->oss.period_ptr += tmp;
1393 runtime->oss.period_ptr %= runtime->oss.period_bytes;
1394 if (runtime->oss.period_ptr == 0 ||
1395 runtime->oss.period_ptr == runtime->oss.buffer_used)
1396 runtime->oss.buffer_used = 0;
1397 else if ((substream->f_flags & O_NONBLOCK) != 0) {
1403 tmp = snd_pcm_oss_write2(substream,
1404 (const char __force *)buf,
1405 runtime->oss.period_bytes, 0);
1408 runtime->oss.bytes += tmp;
1412 if ((substream->f_flags & O_NONBLOCK) != 0 &&
1413 tmp != runtime->oss.period_bytes)
1417 mutex_unlock(&runtime->oss.params_lock);
1421 mutex_unlock(&runtime->oss.params_lock);
1422 return xfer > 0 ? (snd_pcm_sframes_t)xfer : tmp;
1425 static ssize_t snd_pcm_oss_read2(struct snd_pcm_substream *substream, char *buf, size_t bytes, int in_kernel)
1427 struct snd_pcm_runtime *runtime = substream->runtime;
1428 snd_pcm_sframes_t frames, frames1;
1429 #ifdef CONFIG_SND_PCM_OSS_PLUGINS
1430 char __user *final_dst = (char __force __user *)buf;
1431 if (runtime->oss.plugin_first) {
1432 struct snd_pcm_plugin_channel *channels;
1433 size_t oss_frame_bytes = (runtime->oss.plugin_last->dst_width * runtime->oss.plugin_last->dst_format.channels) / 8;
1435 buf = runtime->oss.buffer;
1436 frames = bytes / oss_frame_bytes;
1437 frames1 = snd_pcm_plug_client_channels_buf(substream, buf, frames, &channels);
1440 frames1 = snd_pcm_plug_read_transfer(substream, channels, frames1);
1443 bytes = frames1 * oss_frame_bytes;
1444 if (!in_kernel && copy_to_user(final_dst, buf, bytes))
1449 frames = bytes_to_frames(runtime, bytes);
1450 frames1 = snd_pcm_oss_read3(substream, buf, frames, in_kernel);
1453 bytes = frames_to_bytes(runtime, frames1);
1458 static ssize_t snd_pcm_oss_read1(struct snd_pcm_substream *substream, char __user *buf, size_t bytes)
1462 struct snd_pcm_runtime *runtime = substream->runtime;
1464 if (atomic_read(&substream->mmap_count))
1467 if ((tmp = snd_pcm_oss_make_ready(substream)) < 0)
1469 mutex_lock(&runtime->oss.params_lock);
1471 if (bytes < runtime->oss.period_bytes || runtime->oss.buffer_used > 0) {
1472 if (runtime->oss.buffer_used == 0) {
1473 tmp = snd_pcm_oss_read2(substream, runtime->oss.buffer, runtime->oss.period_bytes, 1);
1476 runtime->oss.bytes += tmp;
1477 runtime->oss.period_ptr = tmp;
1478 runtime->oss.buffer_used = tmp;
1481 if ((size_t) tmp > runtime->oss.buffer_used)
1482 tmp = runtime->oss.buffer_used;
1483 if (copy_to_user(buf, runtime->oss.buffer + (runtime->oss.period_ptr - runtime->oss.buffer_used), tmp)) {
1490 runtime->oss.buffer_used -= tmp;
1492 tmp = snd_pcm_oss_read2(substream, (char __force *)buf,
1493 runtime->oss.period_bytes, 0);
1496 runtime->oss.bytes += tmp;
1502 mutex_unlock(&runtime->oss.params_lock);
1506 mutex_unlock(&runtime->oss.params_lock);
1507 return xfer > 0 ? (snd_pcm_sframes_t)xfer : tmp;
1510 static int snd_pcm_oss_reset(struct snd_pcm_oss_file *pcm_oss_file)
1512 struct snd_pcm_substream *substream;
1513 struct snd_pcm_runtime *runtime;
1516 for (i = 0; i < 2; i++) {
1517 substream = pcm_oss_file->streams[i];
1520 runtime = substream->runtime;
1521 snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DROP, NULL);
1522 runtime->oss.prepare = 1;
1523 runtime->oss.buffer_used = 0;
1524 runtime->oss.prev_hw_ptr_period = 0;
1525 runtime->oss.period_ptr = 0;
1530 static int snd_pcm_oss_post(struct snd_pcm_oss_file *pcm_oss_file)
1532 struct snd_pcm_substream *substream;
1535 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
1536 if (substream != NULL) {
1537 if ((err = snd_pcm_oss_make_ready(substream)) < 0)
1539 snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_START, NULL);
1541 /* note: all errors from the start action are ignored */
1542 /* OSS apps do not know, how to handle them */
1546 static int snd_pcm_oss_sync1(struct snd_pcm_substream *substream, size_t size)
1548 struct snd_pcm_runtime *runtime;
1550 snd_pcm_state_t state;
1554 runtime = substream->runtime;
1555 init_waitqueue_entry(&wait, current);
1556 add_wait_queue(&runtime->sleep, &wait);
1558 pcm_dbg(substream->pcm, "sync1: size = %li\n", size);
1561 result = snd_pcm_oss_write2(substream, runtime->oss.buffer, size, 1);
1563 runtime->oss.buffer_used = 0;
1567 if (result != 0 && result != -EAGAIN)
1570 set_current_state(TASK_INTERRUPTIBLE);
1571 snd_pcm_stream_lock_irq(substream);
1572 state = runtime->status->state;
1573 snd_pcm_stream_unlock_irq(substream);
1574 if (state != SNDRV_PCM_STATE_RUNNING) {
1575 set_current_state(TASK_RUNNING);
1578 res = schedule_timeout(10 * HZ);
1579 if (signal_pending(current)) {
1580 result = -ERESTARTSYS;
1584 pcm_err(substream->pcm,
1585 "OSS sync error - DMA timeout\n");
1590 remove_wait_queue(&runtime->sleep, &wait);
1594 static int snd_pcm_oss_sync(struct snd_pcm_oss_file *pcm_oss_file)
1597 unsigned int saved_f_flags;
1598 struct snd_pcm_substream *substream;
1599 struct snd_pcm_runtime *runtime;
1600 snd_pcm_format_t format;
1601 unsigned long width;
1604 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
1605 if (substream != NULL) {
1606 runtime = substream->runtime;
1607 if (atomic_read(&substream->mmap_count))
1609 if ((err = snd_pcm_oss_make_ready(substream)) < 0)
1611 format = snd_pcm_oss_format_from(runtime->oss.format);
1612 width = snd_pcm_format_physical_width(format);
1613 mutex_lock(&runtime->oss.params_lock);
1614 if (runtime->oss.buffer_used > 0) {
1616 pcm_dbg(substream->pcm, "sync: buffer_used\n");
1618 size = (8 * (runtime->oss.period_bytes - runtime->oss.buffer_used) + 7) / width;
1619 snd_pcm_format_set_silence(format,
1620 runtime->oss.buffer + runtime->oss.buffer_used,
1622 err = snd_pcm_oss_sync1(substream, runtime->oss.period_bytes);
1624 mutex_unlock(&runtime->oss.params_lock);
1627 } else if (runtime->oss.period_ptr > 0) {
1629 pcm_dbg(substream->pcm, "sync: period_ptr\n");
1631 size = runtime->oss.period_bytes - runtime->oss.period_ptr;
1632 snd_pcm_format_set_silence(format,
1633 runtime->oss.buffer,
1635 err = snd_pcm_oss_sync1(substream, size);
1637 mutex_unlock(&runtime->oss.params_lock);
1642 * The ALSA's period might be a bit large than OSS one.
1643 * Fill the remain portion of ALSA period with zeros.
1645 size = runtime->control->appl_ptr % runtime->period_size;
1647 size = runtime->period_size - size;
1648 if (runtime->access == SNDRV_PCM_ACCESS_RW_INTERLEAVED) {
1649 size = (runtime->frame_bits * size) / 8;
1652 size_t size1 = size < runtime->oss.period_bytes ? size : runtime->oss.period_bytes;
1655 size1 /= runtime->sample_bits;
1656 snd_pcm_format_set_silence(runtime->format,
1657 runtime->oss.buffer,
1659 size1 /= runtime->channels; /* frames */
1660 fs = snd_enter_user();
1661 snd_pcm_lib_write(substream, (void __force __user *)runtime->oss.buffer, size1);
1664 } else if (runtime->access == SNDRV_PCM_ACCESS_RW_NONINTERLEAVED) {
1665 void __user *buffers[runtime->channels];
1666 memset(buffers, 0, runtime->channels * sizeof(void *));
1667 snd_pcm_lib_writev(substream, buffers, size);
1670 mutex_unlock(&runtime->oss.params_lock);
1672 * finish sync: drain the buffer
1675 saved_f_flags = substream->f_flags;
1676 substream->f_flags &= ~O_NONBLOCK;
1677 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DRAIN, NULL);
1678 substream->f_flags = saved_f_flags;
1681 runtime->oss.prepare = 1;
1684 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
1685 if (substream != NULL) {
1686 if ((err = snd_pcm_oss_make_ready(substream)) < 0)
1688 runtime = substream->runtime;
1689 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DROP, NULL);
1692 runtime->oss.buffer_used = 0;
1693 runtime->oss.prepare = 1;
1698 static int snd_pcm_oss_set_rate(struct snd_pcm_oss_file *pcm_oss_file, int rate)
1702 for (idx = 1; idx >= 0; --idx) {
1703 struct snd_pcm_substream *substream = pcm_oss_file->streams[idx];
1704 struct snd_pcm_runtime *runtime;
1705 if (substream == NULL)
1707 runtime = substream->runtime;
1710 else if (rate > 192000)
1712 if (runtime->oss.rate != rate) {
1713 runtime->oss.params = 1;
1714 runtime->oss.rate = rate;
1717 return snd_pcm_oss_get_rate(pcm_oss_file);
1720 static int snd_pcm_oss_get_rate(struct snd_pcm_oss_file *pcm_oss_file)
1722 struct snd_pcm_substream *substream;
1725 if ((err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream)) < 0)
1727 return substream->runtime->oss.rate;
1730 static int snd_pcm_oss_set_channels(struct snd_pcm_oss_file *pcm_oss_file, unsigned int channels)
1737 for (idx = 1; idx >= 0; --idx) {
1738 struct snd_pcm_substream *substream = pcm_oss_file->streams[idx];
1739 struct snd_pcm_runtime *runtime;
1740 if (substream == NULL)
1742 runtime = substream->runtime;
1743 if (runtime->oss.channels != channels) {
1744 runtime->oss.params = 1;
1745 runtime->oss.channels = channels;
1748 return snd_pcm_oss_get_channels(pcm_oss_file);
1751 static int snd_pcm_oss_get_channels(struct snd_pcm_oss_file *pcm_oss_file)
1753 struct snd_pcm_substream *substream;
1756 if ((err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream)) < 0)
1758 return substream->runtime->oss.channels;
1761 static int snd_pcm_oss_get_block_size(struct snd_pcm_oss_file *pcm_oss_file)
1763 struct snd_pcm_substream *substream;
1766 if ((err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream)) < 0)
1768 return substream->runtime->oss.period_bytes;
1771 static int snd_pcm_oss_get_formats(struct snd_pcm_oss_file *pcm_oss_file)
1773 struct snd_pcm_substream *substream;
1776 struct snd_pcm_hw_params *params;
1777 unsigned int formats = 0;
1778 struct snd_mask format_mask;
1781 if ((err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream)) < 0)
1783 if (atomic_read(&substream->mmap_count))
1786 direct = substream->oss.setup.direct;
1788 return AFMT_MU_LAW | AFMT_U8 |
1789 AFMT_S16_LE | AFMT_S16_BE |
1790 AFMT_S8 | AFMT_U16_LE |
1792 AFMT_S32_LE | AFMT_S32_BE |
1793 AFMT_S24_LE | AFMT_S24_BE |
1795 params = kmalloc(sizeof(*params), GFP_KERNEL);
1798 _snd_pcm_hw_params_any(params);
1799 err = snd_pcm_hw_refine(substream, params);
1800 format_mask = *hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT);
1804 for (fmt = 0; fmt < 32; ++fmt) {
1805 if (snd_mask_test(&format_mask, fmt)) {
1806 int f = snd_pcm_oss_format_to(fmt);
1814 static int snd_pcm_oss_set_format(struct snd_pcm_oss_file *pcm_oss_file, int format)
1818 if (format != AFMT_QUERY) {
1819 formats = snd_pcm_oss_get_formats(pcm_oss_file);
1822 if (!(formats & format))
1824 for (idx = 1; idx >= 0; --idx) {
1825 struct snd_pcm_substream *substream = pcm_oss_file->streams[idx];
1826 struct snd_pcm_runtime *runtime;
1827 if (substream == NULL)
1829 runtime = substream->runtime;
1830 if (runtime->oss.format != format) {
1831 runtime->oss.params = 1;
1832 runtime->oss.format = format;
1836 return snd_pcm_oss_get_format(pcm_oss_file);
1839 static int snd_pcm_oss_get_format(struct snd_pcm_oss_file *pcm_oss_file)
1841 struct snd_pcm_substream *substream;
1844 if ((err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream)) < 0)
1846 return substream->runtime->oss.format;
1849 static int snd_pcm_oss_set_subdivide1(struct snd_pcm_substream *substream, int subdivide)
1851 struct snd_pcm_runtime *runtime;
1853 if (substream == NULL)
1855 runtime = substream->runtime;
1856 if (subdivide == 0) {
1857 subdivide = runtime->oss.subdivision;
1862 if (runtime->oss.subdivision || runtime->oss.fragshift)
1864 if (subdivide != 1 && subdivide != 2 && subdivide != 4 &&
1865 subdivide != 8 && subdivide != 16)
1867 runtime->oss.subdivision = subdivide;
1868 runtime->oss.params = 1;
1872 static int snd_pcm_oss_set_subdivide(struct snd_pcm_oss_file *pcm_oss_file, int subdivide)
1874 int err = -EINVAL, idx;
1876 for (idx = 1; idx >= 0; --idx) {
1877 struct snd_pcm_substream *substream = pcm_oss_file->streams[idx];
1878 if (substream == NULL)
1880 if ((err = snd_pcm_oss_set_subdivide1(substream, subdivide)) < 0)
1886 static int snd_pcm_oss_set_fragment1(struct snd_pcm_substream *substream, unsigned int val)
1888 struct snd_pcm_runtime *runtime;
1890 if (substream == NULL)
1892 runtime = substream->runtime;
1893 if (runtime->oss.subdivision || runtime->oss.fragshift)
1895 runtime->oss.fragshift = val & 0xffff;
1896 runtime->oss.maxfrags = (val >> 16) & 0xffff;
1897 if (runtime->oss.fragshift < 4) /* < 16 */
1898 runtime->oss.fragshift = 4;
1899 if (runtime->oss.maxfrags < 2)
1900 runtime->oss.maxfrags = 2;
1901 runtime->oss.params = 1;
1905 static int snd_pcm_oss_set_fragment(struct snd_pcm_oss_file *pcm_oss_file, unsigned int val)
1907 int err = -EINVAL, idx;
1909 for (idx = 1; idx >= 0; --idx) {
1910 struct snd_pcm_substream *substream = pcm_oss_file->streams[idx];
1911 if (substream == NULL)
1913 if ((err = snd_pcm_oss_set_fragment1(substream, val)) < 0)
1919 static int snd_pcm_oss_nonblock(struct file * file)
1921 spin_lock(&file->f_lock);
1922 file->f_flags |= O_NONBLOCK;
1923 spin_unlock(&file->f_lock);
1927 static int snd_pcm_oss_get_caps1(struct snd_pcm_substream *substream, int res)
1930 if (substream == NULL) {
1931 res &= ~DSP_CAP_DUPLEX;
1934 #ifdef DSP_CAP_MULTI
1935 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
1936 if (substream->pstr->substream_count > 1)
1937 res |= DSP_CAP_MULTI;
1939 /* DSP_CAP_REALTIME is set all times: */
1940 /* all ALSA drivers can return actual pointer in ring buffer */
1941 #if defined(DSP_CAP_REALTIME) && 0
1943 struct snd_pcm_runtime *runtime = substream->runtime;
1944 if (runtime->info & (SNDRV_PCM_INFO_BLOCK_TRANSFER|SNDRV_PCM_INFO_BATCH))
1945 res &= ~DSP_CAP_REALTIME;
1951 static int snd_pcm_oss_get_caps(struct snd_pcm_oss_file *pcm_oss_file)
1955 result = DSP_CAP_TRIGGER | DSP_CAP_MMAP | DSP_CAP_DUPLEX | DSP_CAP_REALTIME;
1956 for (idx = 0; idx < 2; idx++) {
1957 struct snd_pcm_substream *substream = pcm_oss_file->streams[idx];
1958 result = snd_pcm_oss_get_caps1(substream, result);
1960 result |= 0x0001; /* revision - same as SB AWE 64 */
1964 static void snd_pcm_oss_simulate_fill(struct snd_pcm_substream *substream,
1965 snd_pcm_uframes_t hw_ptr)
1967 struct snd_pcm_runtime *runtime = substream->runtime;
1968 snd_pcm_uframes_t appl_ptr;
1969 appl_ptr = hw_ptr + runtime->buffer_size;
1970 appl_ptr %= runtime->boundary;
1971 runtime->control->appl_ptr = appl_ptr;
1974 static int snd_pcm_oss_set_trigger(struct snd_pcm_oss_file *pcm_oss_file, int trigger)
1976 struct snd_pcm_runtime *runtime;
1977 struct snd_pcm_substream *psubstream = NULL, *csubstream = NULL;
1981 pcm_dbg(substream->pcm, "pcm_oss: trigger = 0x%x\n", trigger);
1984 psubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
1985 csubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
1988 if ((err = snd_pcm_oss_make_ready(psubstream)) < 0)
1992 if ((err = snd_pcm_oss_make_ready(csubstream)) < 0)
1996 runtime = psubstream->runtime;
1997 if (trigger & PCM_ENABLE_OUTPUT) {
1998 if (runtime->oss.trigger)
2000 if (atomic_read(&psubstream->mmap_count))
2001 snd_pcm_oss_simulate_fill(psubstream,
2002 get_hw_ptr_period(runtime));
2003 runtime->oss.trigger = 1;
2004 runtime->start_threshold = 1;
2005 cmd = SNDRV_PCM_IOCTL_START;
2007 if (!runtime->oss.trigger)
2009 runtime->oss.trigger = 0;
2010 runtime->start_threshold = runtime->boundary;
2011 cmd = SNDRV_PCM_IOCTL_DROP;
2012 runtime->oss.prepare = 1;
2014 err = snd_pcm_kernel_ioctl(psubstream, cmd, NULL);
2020 runtime = csubstream->runtime;
2021 if (trigger & PCM_ENABLE_INPUT) {
2022 if (runtime->oss.trigger)
2024 runtime->oss.trigger = 1;
2025 runtime->start_threshold = 1;
2026 cmd = SNDRV_PCM_IOCTL_START;
2028 if (!runtime->oss.trigger)
2030 runtime->oss.trigger = 0;
2031 runtime->start_threshold = runtime->boundary;
2032 cmd = SNDRV_PCM_IOCTL_DROP;
2033 runtime->oss.prepare = 1;
2035 err = snd_pcm_kernel_ioctl(csubstream, cmd, NULL);
2043 static int snd_pcm_oss_get_trigger(struct snd_pcm_oss_file *pcm_oss_file)
2045 struct snd_pcm_substream *psubstream = NULL, *csubstream = NULL;
2048 psubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
2049 csubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
2050 if (psubstream && psubstream->runtime && psubstream->runtime->oss.trigger)
2051 result |= PCM_ENABLE_OUTPUT;
2052 if (csubstream && csubstream->runtime && csubstream->runtime->oss.trigger)
2053 result |= PCM_ENABLE_INPUT;
2057 static int snd_pcm_oss_get_odelay(struct snd_pcm_oss_file *pcm_oss_file)
2059 struct snd_pcm_substream *substream;
2060 struct snd_pcm_runtime *runtime;
2061 snd_pcm_sframes_t delay;
2064 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
2065 if (substream == NULL)
2067 if ((err = snd_pcm_oss_make_ready(substream)) < 0)
2069 runtime = substream->runtime;
2070 if (runtime->oss.params || runtime->oss.prepare)
2072 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DELAY, &delay);
2074 delay = 0; /* hack for broken OSS applications */
2077 return snd_pcm_oss_bytes(substream, delay);
2080 static int snd_pcm_oss_get_ptr(struct snd_pcm_oss_file *pcm_oss_file, int stream, struct count_info __user * _info)
2082 struct snd_pcm_substream *substream;
2083 struct snd_pcm_runtime *runtime;
2084 snd_pcm_sframes_t delay;
2086 struct count_info info;
2091 substream = pcm_oss_file->streams[stream];
2092 if (substream == NULL)
2094 if ((err = snd_pcm_oss_make_ready(substream)) < 0)
2096 runtime = substream->runtime;
2097 if (runtime->oss.params || runtime->oss.prepare) {
2098 memset(&info, 0, sizeof(info));
2099 if (copy_to_user(_info, &info, sizeof(info)))
2103 if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
2104 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DELAY, &delay);
2105 if (err == -EPIPE || err == -ESTRPIPE || (! err && delay < 0)) {
2110 fixup = runtime->oss.buffer_used;
2113 err = snd_pcm_oss_capture_position_fixup(substream, &delay);
2114 fixup = -runtime->oss.buffer_used;
2118 info.ptr = snd_pcm_oss_bytes(substream, runtime->status->hw_ptr % runtime->buffer_size);
2119 if (atomic_read(&substream->mmap_count)) {
2120 snd_pcm_sframes_t n;
2121 delay = get_hw_ptr_period(runtime);
2122 n = delay - runtime->oss.prev_hw_ptr_period;
2124 n += runtime->boundary;
2125 info.blocks = n / runtime->period_size;
2126 runtime->oss.prev_hw_ptr_period = delay;
2127 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
2128 snd_pcm_oss_simulate_fill(substream, delay);
2129 info.bytes = snd_pcm_oss_bytes(substream, runtime->status->hw_ptr) & INT_MAX;
2131 delay = snd_pcm_oss_bytes(substream, delay);
2132 if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
2133 if (substream->oss.setup.buggyptr)
2134 info.blocks = (runtime->oss.buffer_bytes - delay - fixup) / runtime->oss.period_bytes;
2136 info.blocks = (delay + fixup) / runtime->oss.period_bytes;
2137 info.bytes = (runtime->oss.bytes - delay) & INT_MAX;
2140 info.blocks = delay / runtime->oss.period_bytes;
2141 info.bytes = (runtime->oss.bytes + delay) & INT_MAX;
2144 if (copy_to_user(_info, &info, sizeof(info)))
2149 static int snd_pcm_oss_get_space(struct snd_pcm_oss_file *pcm_oss_file, int stream, struct audio_buf_info __user *_info)
2151 struct snd_pcm_substream *substream;
2152 struct snd_pcm_runtime *runtime;
2153 snd_pcm_sframes_t avail;
2155 struct audio_buf_info info;
2160 substream = pcm_oss_file->streams[stream];
2161 if (substream == NULL)
2163 runtime = substream->runtime;
2165 if (runtime->oss.params &&
2166 (err = snd_pcm_oss_change_params(substream)) < 0)
2169 info.fragsize = runtime->oss.period_bytes;
2170 info.fragstotal = runtime->periods;
2171 if (runtime->oss.prepare) {
2172 if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
2173 info.bytes = runtime->oss.period_bytes * runtime->oss.periods;
2174 info.fragments = runtime->oss.periods;
2180 if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
2181 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DELAY, &avail);
2182 if (err == -EPIPE || err == -ESTRPIPE || (! err && avail < 0)) {
2183 avail = runtime->buffer_size;
2187 avail = runtime->buffer_size - avail;
2188 fixup = -runtime->oss.buffer_used;
2191 err = snd_pcm_oss_capture_position_fixup(substream, &avail);
2192 fixup = runtime->oss.buffer_used;
2196 info.bytes = snd_pcm_oss_bytes(substream, avail) + fixup;
2197 info.fragments = info.bytes / runtime->oss.period_bytes;
2201 pcm_dbg(substream->pcm,
2202 "pcm_oss: space: bytes = %i, fragments = %i, fragstotal = %i, fragsize = %i\n",
2203 info.bytes, info.fragments, info.fragstotal, info.fragsize);
2205 if (copy_to_user(_info, &info, sizeof(info)))
2210 static int snd_pcm_oss_get_mapbuf(struct snd_pcm_oss_file *pcm_oss_file, int stream, struct buffmem_desc __user * _info)
2212 // it won't be probably implemented
2213 // pr_debug("TODO: snd_pcm_oss_get_mapbuf\n");
2217 static const char *strip_task_path(const char *path)
2219 const char *ptr, *ptrl = NULL;
2220 for (ptr = path; *ptr; ptr++) {
2227 static void snd_pcm_oss_look_for_setup(struct snd_pcm *pcm, int stream,
2228 const char *task_name,
2229 struct snd_pcm_oss_setup *rsetup)
2231 struct snd_pcm_oss_setup *setup;
2233 mutex_lock(&pcm->streams[stream].oss.setup_mutex);
2235 for (setup = pcm->streams[stream].oss.setup_list; setup;
2236 setup = setup->next) {
2237 if (!strcmp(setup->task_name, task_name))
2240 } while ((task_name = strip_task_path(task_name)) != NULL);
2244 mutex_unlock(&pcm->streams[stream].oss.setup_mutex);
2247 static void snd_pcm_oss_release_substream(struct snd_pcm_substream *substream)
2249 struct snd_pcm_runtime *runtime;
2250 runtime = substream->runtime;
2251 vfree(runtime->oss.buffer);
2252 runtime->oss.buffer = NULL;
2253 #ifdef CONFIG_SND_PCM_OSS_PLUGINS
2254 snd_pcm_oss_plugin_clear(substream);
2256 substream->oss.oss = 0;
2259 static void snd_pcm_oss_init_substream(struct snd_pcm_substream *substream,
2260 struct snd_pcm_oss_setup *setup,
2263 struct snd_pcm_runtime *runtime;
2265 substream->oss.oss = 1;
2266 substream->oss.setup = *setup;
2267 if (setup->nonblock)
2268 substream->f_flags |= O_NONBLOCK;
2269 else if (setup->block)
2270 substream->f_flags &= ~O_NONBLOCK;
2271 runtime = substream->runtime;
2272 runtime->oss.params = 1;
2273 runtime->oss.trigger = 1;
2274 runtime->oss.rate = 8000;
2275 mutex_init(&runtime->oss.params_lock);
2276 switch (SNDRV_MINOR_OSS_DEVICE(minor)) {
2277 case SNDRV_MINOR_OSS_PCM_8:
2278 runtime->oss.format = AFMT_U8;
2280 case SNDRV_MINOR_OSS_PCM_16:
2281 runtime->oss.format = AFMT_S16_LE;
2284 runtime->oss.format = AFMT_MU_LAW;
2286 runtime->oss.channels = 1;
2287 runtime->oss.fragshift = 0;
2288 runtime->oss.maxfrags = 0;
2289 runtime->oss.subdivision = 0;
2290 substream->pcm_release = snd_pcm_oss_release_substream;
2293 static int snd_pcm_oss_release_file(struct snd_pcm_oss_file *pcm_oss_file)
2298 for (cidx = 0; cidx < 2; ++cidx) {
2299 struct snd_pcm_substream *substream = pcm_oss_file->streams[cidx];
2301 snd_pcm_release_substream(substream);
2303 kfree(pcm_oss_file);
2307 static int snd_pcm_oss_open_file(struct file *file,
2308 struct snd_pcm *pcm,
2309 struct snd_pcm_oss_file **rpcm_oss_file,
2311 struct snd_pcm_oss_setup *setup)
2314 struct snd_pcm_oss_file *pcm_oss_file;
2315 struct snd_pcm_substream *substream;
2316 fmode_t f_mode = file->f_mode;
2319 *rpcm_oss_file = NULL;
2321 pcm_oss_file = kzalloc(sizeof(*pcm_oss_file), GFP_KERNEL);
2322 if (pcm_oss_file == NULL)
2325 if ((f_mode & (FMODE_WRITE|FMODE_READ)) == (FMODE_WRITE|FMODE_READ) &&
2326 (pcm->info_flags & SNDRV_PCM_INFO_HALF_DUPLEX))
2327 f_mode = FMODE_WRITE;
2329 file->f_flags &= ~O_APPEND;
2330 for (idx = 0; idx < 2; idx++) {
2331 if (setup[idx].disable)
2333 if (! pcm->streams[idx].substream_count)
2334 continue; /* no matching substream */
2335 if (idx == SNDRV_PCM_STREAM_PLAYBACK) {
2336 if (! (f_mode & FMODE_WRITE))
2339 if (! (f_mode & FMODE_READ))
2342 err = snd_pcm_open_substream(pcm, idx, file, &substream);
2344 snd_pcm_oss_release_file(pcm_oss_file);
2348 pcm_oss_file->streams[idx] = substream;
2349 substream->file = pcm_oss_file;
2350 snd_pcm_oss_init_substream(substream, &setup[idx], minor);
2353 if (!pcm_oss_file->streams[0] && !pcm_oss_file->streams[1]) {
2354 snd_pcm_oss_release_file(pcm_oss_file);
2358 file->private_data = pcm_oss_file;
2360 *rpcm_oss_file = pcm_oss_file;
2365 static int snd_task_name(struct task_struct *task, char *name, size_t size)
2369 if (snd_BUG_ON(!task || !name || size < 2))
2371 for (idx = 0; idx < sizeof(task->comm) && idx + 1 < size; idx++)
2372 name[idx] = task->comm[idx];
2377 static int snd_pcm_oss_open(struct inode *inode, struct file *file)
2381 struct snd_pcm *pcm;
2382 struct snd_pcm_oss_file *pcm_oss_file;
2383 struct snd_pcm_oss_setup setup[2];
2387 err = nonseekable_open(inode, file);
2391 pcm = snd_lookup_oss_minor_data(iminor(inode),
2392 SNDRV_OSS_DEVICE_TYPE_PCM);
2397 err = snd_card_file_add(pcm->card, file);
2400 if (!try_module_get(pcm->card->module)) {
2404 if (snd_task_name(current, task_name, sizeof(task_name)) < 0) {
2408 memset(setup, 0, sizeof(setup));
2409 if (file->f_mode & FMODE_WRITE)
2410 snd_pcm_oss_look_for_setup(pcm, SNDRV_PCM_STREAM_PLAYBACK,
2411 task_name, &setup[0]);
2412 if (file->f_mode & FMODE_READ)
2413 snd_pcm_oss_look_for_setup(pcm, SNDRV_PCM_STREAM_CAPTURE,
2414 task_name, &setup[1]);
2416 nonblock = !!(file->f_flags & O_NONBLOCK);
2418 nonblock = nonblock_open;
2420 init_waitqueue_entry(&wait, current);
2421 add_wait_queue(&pcm->open_wait, &wait);
2422 mutex_lock(&pcm->open_mutex);
2424 err = snd_pcm_oss_open_file(file, pcm, &pcm_oss_file,
2425 iminor(inode), setup);
2428 if (err == -EAGAIN) {
2435 set_current_state(TASK_INTERRUPTIBLE);
2436 mutex_unlock(&pcm->open_mutex);
2438 mutex_lock(&pcm->open_mutex);
2439 if (pcm->card->shutdown) {
2443 if (signal_pending(current)) {
2448 remove_wait_queue(&pcm->open_wait, &wait);
2449 mutex_unlock(&pcm->open_mutex);
2452 snd_card_unref(pcm->card);
2456 module_put(pcm->card->module);
2458 snd_card_file_remove(pcm->card, file);
2461 snd_card_unref(pcm->card);
2465 static int snd_pcm_oss_release(struct inode *inode, struct file *file)
2467 struct snd_pcm *pcm;
2468 struct snd_pcm_substream *substream;
2469 struct snd_pcm_oss_file *pcm_oss_file;
2471 pcm_oss_file = file->private_data;
2472 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
2473 if (substream == NULL)
2474 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
2475 if (snd_BUG_ON(!substream))
2477 pcm = substream->pcm;
2478 if (!pcm->card->shutdown)
2479 snd_pcm_oss_sync(pcm_oss_file);
2480 mutex_lock(&pcm->open_mutex);
2481 snd_pcm_oss_release_file(pcm_oss_file);
2482 mutex_unlock(&pcm->open_mutex);
2483 wake_up(&pcm->open_wait);
2484 module_put(pcm->card->module);
2485 snd_card_file_remove(pcm->card, file);
2489 static long snd_pcm_oss_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
2491 struct snd_pcm_oss_file *pcm_oss_file;
2492 int __user *p = (int __user *)arg;
2495 pcm_oss_file = file->private_data;
2496 if (cmd == OSS_GETVERSION)
2497 return put_user(SNDRV_OSS_VERSION, p);
2498 if (cmd == OSS_ALSAEMULVER)
2499 return put_user(1, p);
2500 #if defined(CONFIG_SND_MIXER_OSS) || (defined(MODULE) && defined(CONFIG_SND_MIXER_OSS_MODULE))
2501 if (((cmd >> 8) & 0xff) == 'M') { /* mixer ioctl - for OSS compatibility */
2502 struct snd_pcm_substream *substream;
2504 for (idx = 0; idx < 2; ++idx) {
2505 substream = pcm_oss_file->streams[idx];
2506 if (substream != NULL)
2509 if (snd_BUG_ON(idx >= 2))
2511 return snd_mixer_oss_ioctl_card(substream->pcm->card, cmd, arg);
2514 if (((cmd >> 8) & 0xff) != 'P')
2517 pr_debug("pcm_oss: ioctl = 0x%x\n", cmd);
2520 case SNDCTL_DSP_RESET:
2521 return snd_pcm_oss_reset(pcm_oss_file);
2522 case SNDCTL_DSP_SYNC:
2523 return snd_pcm_oss_sync(pcm_oss_file);
2524 case SNDCTL_DSP_SPEED:
2525 if (get_user(res, p))
2527 if ((res = snd_pcm_oss_set_rate(pcm_oss_file, res))<0)
2529 return put_user(res, p);
2530 case SOUND_PCM_READ_RATE:
2531 res = snd_pcm_oss_get_rate(pcm_oss_file);
2534 return put_user(res, p);
2535 case SNDCTL_DSP_STEREO:
2536 if (get_user(res, p))
2538 res = res > 0 ? 2 : 1;
2539 if ((res = snd_pcm_oss_set_channels(pcm_oss_file, res)) < 0)
2541 return put_user(--res, p);
2542 case SNDCTL_DSP_GETBLKSIZE:
2543 res = snd_pcm_oss_get_block_size(pcm_oss_file);
2546 return put_user(res, p);
2547 case SNDCTL_DSP_SETFMT:
2548 if (get_user(res, p))
2550 res = snd_pcm_oss_set_format(pcm_oss_file, res);
2553 return put_user(res, p);
2554 case SOUND_PCM_READ_BITS:
2555 res = snd_pcm_oss_get_format(pcm_oss_file);
2558 return put_user(res, p);
2559 case SNDCTL_DSP_CHANNELS:
2560 if (get_user(res, p))
2562 res = snd_pcm_oss_set_channels(pcm_oss_file, res);
2565 return put_user(res, p);
2566 case SOUND_PCM_READ_CHANNELS:
2567 res = snd_pcm_oss_get_channels(pcm_oss_file);
2570 return put_user(res, p);
2571 case SOUND_PCM_WRITE_FILTER:
2572 case SOUND_PCM_READ_FILTER:
2574 case SNDCTL_DSP_POST:
2575 return snd_pcm_oss_post(pcm_oss_file);
2576 case SNDCTL_DSP_SUBDIVIDE:
2577 if (get_user(res, p))
2579 res = snd_pcm_oss_set_subdivide(pcm_oss_file, res);
2582 return put_user(res, p);
2583 case SNDCTL_DSP_SETFRAGMENT:
2584 if (get_user(res, p))
2586 return snd_pcm_oss_set_fragment(pcm_oss_file, res);
2587 case SNDCTL_DSP_GETFMTS:
2588 res = snd_pcm_oss_get_formats(pcm_oss_file);
2591 return put_user(res, p);
2592 case SNDCTL_DSP_GETOSPACE:
2593 case SNDCTL_DSP_GETISPACE:
2594 return snd_pcm_oss_get_space(pcm_oss_file,
2595 cmd == SNDCTL_DSP_GETISPACE ?
2596 SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK,
2597 (struct audio_buf_info __user *) arg);
2598 case SNDCTL_DSP_NONBLOCK:
2599 return snd_pcm_oss_nonblock(file);
2600 case SNDCTL_DSP_GETCAPS:
2601 res = snd_pcm_oss_get_caps(pcm_oss_file);
2604 return put_user(res, p);
2605 case SNDCTL_DSP_GETTRIGGER:
2606 res = snd_pcm_oss_get_trigger(pcm_oss_file);
2609 return put_user(res, p);
2610 case SNDCTL_DSP_SETTRIGGER:
2611 if (get_user(res, p))
2613 return snd_pcm_oss_set_trigger(pcm_oss_file, res);
2614 case SNDCTL_DSP_GETIPTR:
2615 case SNDCTL_DSP_GETOPTR:
2616 return snd_pcm_oss_get_ptr(pcm_oss_file,
2617 cmd == SNDCTL_DSP_GETIPTR ?
2618 SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK,
2619 (struct count_info __user *) arg);
2620 case SNDCTL_DSP_MAPINBUF:
2621 case SNDCTL_DSP_MAPOUTBUF:
2622 return snd_pcm_oss_get_mapbuf(pcm_oss_file,
2623 cmd == SNDCTL_DSP_MAPINBUF ?
2624 SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK,
2625 (struct buffmem_desc __user *) arg);
2626 case SNDCTL_DSP_SETSYNCRO:
2627 /* stop DMA now.. */
2629 case SNDCTL_DSP_SETDUPLEX:
2630 if (snd_pcm_oss_get_caps(pcm_oss_file) & DSP_CAP_DUPLEX)
2633 case SNDCTL_DSP_GETODELAY:
2634 res = snd_pcm_oss_get_odelay(pcm_oss_file);
2636 /* it's for sure, some broken apps don't check for error codes */
2640 return put_user(res, p);
2641 case SNDCTL_DSP_PROFILE:
2642 return 0; /* silently ignore */
2644 pr_debug("pcm_oss: unknown command = 0x%x\n", cmd);
2649 #ifdef CONFIG_COMPAT
2650 /* all compatible */
2651 #define snd_pcm_oss_ioctl_compat snd_pcm_oss_ioctl
2653 #define snd_pcm_oss_ioctl_compat NULL
2656 static ssize_t snd_pcm_oss_read(struct file *file, char __user *buf, size_t count, loff_t *offset)
2658 struct snd_pcm_oss_file *pcm_oss_file;
2659 struct snd_pcm_substream *substream;
2661 pcm_oss_file = file->private_data;
2662 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
2663 if (substream == NULL)
2665 substream->f_flags = file->f_flags & O_NONBLOCK;
2667 return snd_pcm_oss_read1(substream, buf, count);
2670 ssize_t res = snd_pcm_oss_read1(substream, buf, count);
2671 pcm_dbg(substream->pcm,
2672 "pcm_oss: read %li bytes (returned %li bytes)\n",
2673 (long)count, (long)res);
2679 static ssize_t snd_pcm_oss_write(struct file *file, const char __user *buf, size_t count, loff_t *offset)
2681 struct snd_pcm_oss_file *pcm_oss_file;
2682 struct snd_pcm_substream *substream;
2685 pcm_oss_file = file->private_data;
2686 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
2687 if (substream == NULL)
2689 substream->f_flags = file->f_flags & O_NONBLOCK;
2690 result = snd_pcm_oss_write1(substream, buf, count);
2692 pcm_dbg(substream->pcm, "pcm_oss: write %li bytes (wrote %li bytes)\n",
2693 (long)count, (long)result);
2698 static int snd_pcm_oss_playback_ready(struct snd_pcm_substream *substream)
2700 struct snd_pcm_runtime *runtime = substream->runtime;
2701 if (atomic_read(&substream->mmap_count))
2702 return runtime->oss.prev_hw_ptr_period !=
2703 get_hw_ptr_period(runtime);
2705 return snd_pcm_playback_avail(runtime) >=
2706 runtime->oss.period_frames;
2709 static int snd_pcm_oss_capture_ready(struct snd_pcm_substream *substream)
2711 struct snd_pcm_runtime *runtime = substream->runtime;
2712 if (atomic_read(&substream->mmap_count))
2713 return runtime->oss.prev_hw_ptr_period !=
2714 get_hw_ptr_period(runtime);
2716 return snd_pcm_capture_avail(runtime) >=
2717 runtime->oss.period_frames;
2720 static unsigned int snd_pcm_oss_poll(struct file *file, poll_table * wait)
2722 struct snd_pcm_oss_file *pcm_oss_file;
2724 struct snd_pcm_substream *psubstream = NULL, *csubstream = NULL;
2726 pcm_oss_file = file->private_data;
2728 psubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
2729 csubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
2732 if (psubstream != NULL) {
2733 struct snd_pcm_runtime *runtime = psubstream->runtime;
2734 poll_wait(file, &runtime->sleep, wait);
2735 snd_pcm_stream_lock_irq(psubstream);
2736 if (runtime->status->state != SNDRV_PCM_STATE_DRAINING &&
2737 (runtime->status->state != SNDRV_PCM_STATE_RUNNING ||
2738 snd_pcm_oss_playback_ready(psubstream)))
2739 mask |= POLLOUT | POLLWRNORM;
2740 snd_pcm_stream_unlock_irq(psubstream);
2742 if (csubstream != NULL) {
2743 struct snd_pcm_runtime *runtime = csubstream->runtime;
2744 snd_pcm_state_t ostate;
2745 poll_wait(file, &runtime->sleep, wait);
2746 snd_pcm_stream_lock_irq(csubstream);
2747 if ((ostate = runtime->status->state) != SNDRV_PCM_STATE_RUNNING ||
2748 snd_pcm_oss_capture_ready(csubstream))
2749 mask |= POLLIN | POLLRDNORM;
2750 snd_pcm_stream_unlock_irq(csubstream);
2751 if (ostate != SNDRV_PCM_STATE_RUNNING && runtime->oss.trigger) {
2752 struct snd_pcm_oss_file ofile;
2753 memset(&ofile, 0, sizeof(ofile));
2754 ofile.streams[SNDRV_PCM_STREAM_CAPTURE] = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
2755 runtime->oss.trigger = 0;
2756 snd_pcm_oss_set_trigger(&ofile, PCM_ENABLE_INPUT);
2763 static int snd_pcm_oss_mmap(struct file *file, struct vm_area_struct *area)
2765 struct snd_pcm_oss_file *pcm_oss_file;
2766 struct snd_pcm_substream *substream = NULL;
2767 struct snd_pcm_runtime *runtime;
2771 pr_debug("pcm_oss: mmap begin\n");
2773 pcm_oss_file = file->private_data;
2774 switch ((area->vm_flags & (VM_READ | VM_WRITE))) {
2775 case VM_READ | VM_WRITE:
2776 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
2781 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
2784 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
2789 /* set VM_READ access as well to fix memset() routines that do
2790 reads before writes (to improve performance) */
2791 area->vm_flags |= VM_READ;
2792 if (substream == NULL)
2794 runtime = substream->runtime;
2795 if (!(runtime->info & SNDRV_PCM_INFO_MMAP_VALID))
2797 if (runtime->info & SNDRV_PCM_INFO_INTERLEAVED)
2798 runtime->access = SNDRV_PCM_ACCESS_MMAP_INTERLEAVED;
2802 if (runtime->oss.params) {
2803 if ((err = snd_pcm_oss_change_params(substream)) < 0)
2806 #ifdef CONFIG_SND_PCM_OSS_PLUGINS
2807 if (runtime->oss.plugin_first != NULL)
2811 if (area->vm_pgoff != 0)
2814 err = snd_pcm_mmap_data(substream, file, area);
2817 runtime->oss.mmap_bytes = area->vm_end - area->vm_start;
2818 runtime->silence_threshold = 0;
2819 runtime->silence_size = 0;
2821 pr_debug("pcm_oss: mmap ok, bytes = 0x%x\n",
2822 runtime->oss.mmap_bytes);
2824 /* In mmap mode we never stop */
2825 runtime->stop_threshold = runtime->boundary;
2830 #ifdef CONFIG_SND_VERBOSE_PROCFS
2835 static void snd_pcm_oss_proc_read(struct snd_info_entry *entry,
2836 struct snd_info_buffer *buffer)
2838 struct snd_pcm_str *pstr = entry->private_data;
2839 struct snd_pcm_oss_setup *setup = pstr->oss.setup_list;
2840 mutex_lock(&pstr->oss.setup_mutex);
2842 snd_iprintf(buffer, "%s %u %u%s%s%s%s%s%s\n",
2846 setup->disable ? " disable" : "",
2847 setup->direct ? " direct" : "",
2848 setup->block ? " block" : "",
2849 setup->nonblock ? " non-block" : "",
2850 setup->partialfrag ? " partial-frag" : "",
2851 setup->nosilence ? " no-silence" : "");
2852 setup = setup->next;
2854 mutex_unlock(&pstr->oss.setup_mutex);
2857 static void snd_pcm_oss_proc_free_setup_list(struct snd_pcm_str * pstr)
2859 struct snd_pcm_oss_setup *setup, *setupn;
2861 for (setup = pstr->oss.setup_list, pstr->oss.setup_list = NULL;
2862 setup; setup = setupn) {
2863 setupn = setup->next;
2864 kfree(setup->task_name);
2867 pstr->oss.setup_list = NULL;
2870 static void snd_pcm_oss_proc_write(struct snd_info_entry *entry,
2871 struct snd_info_buffer *buffer)
2873 struct snd_pcm_str *pstr = entry->private_data;
2874 char line[128], str[32], task_name[32];
2877 struct snd_pcm_oss_setup *setup, *setup1, template;
2879 while (!snd_info_get_line(buffer, line, sizeof(line))) {
2880 mutex_lock(&pstr->oss.setup_mutex);
2881 memset(&template, 0, sizeof(template));
2882 ptr = snd_info_get_str(task_name, line, sizeof(task_name));
2883 if (!strcmp(task_name, "clear") || !strcmp(task_name, "erase")) {
2884 snd_pcm_oss_proc_free_setup_list(pstr);
2885 mutex_unlock(&pstr->oss.setup_mutex);
2888 for (setup = pstr->oss.setup_list; setup; setup = setup->next) {
2889 if (!strcmp(setup->task_name, task_name)) {
2894 ptr = snd_info_get_str(str, ptr, sizeof(str));
2895 template.periods = simple_strtoul(str, NULL, 10);
2896 ptr = snd_info_get_str(str, ptr, sizeof(str));
2897 template.period_size = simple_strtoul(str, NULL, 10);
2898 for (idx1 = 31; idx1 >= 0; idx1--)
2899 if (template.period_size & (1 << idx1))
2901 for (idx1--; idx1 >= 0; idx1--)
2902 template.period_size &= ~(1 << idx1);
2904 ptr = snd_info_get_str(str, ptr, sizeof(str));
2905 if (!strcmp(str, "disable")) {
2906 template.disable = 1;
2907 } else if (!strcmp(str, "direct")) {
2908 template.direct = 1;
2909 } else if (!strcmp(str, "block")) {
2911 } else if (!strcmp(str, "non-block")) {
2912 template.nonblock = 1;
2913 } else if (!strcmp(str, "partial-frag")) {
2914 template.partialfrag = 1;
2915 } else if (!strcmp(str, "no-silence")) {
2916 template.nosilence = 1;
2917 } else if (!strcmp(str, "buggy-ptr")) {
2918 template.buggyptr = 1;
2921 if (setup == NULL) {
2922 setup = kmalloc(sizeof(*setup), GFP_KERNEL);
2924 buffer->error = -ENOMEM;
2925 mutex_unlock(&pstr->oss.setup_mutex);
2928 if (pstr->oss.setup_list == NULL)
2929 pstr->oss.setup_list = setup;
2931 for (setup1 = pstr->oss.setup_list;
2932 setup1->next; setup1 = setup1->next);
2933 setup1->next = setup;
2935 template.task_name = kstrdup(task_name, GFP_KERNEL);
2936 if (! template.task_name) {
2938 buffer->error = -ENOMEM;
2939 mutex_unlock(&pstr->oss.setup_mutex);
2944 mutex_unlock(&pstr->oss.setup_mutex);
2948 static void snd_pcm_oss_proc_init(struct snd_pcm *pcm)
2951 for (stream = 0; stream < 2; ++stream) {
2952 struct snd_info_entry *entry;
2953 struct snd_pcm_str *pstr = &pcm->streams[stream];
2954 if (pstr->substream_count == 0)
2956 if ((entry = snd_info_create_card_entry(pcm->card, "oss", pstr->proc_root)) != NULL) {
2957 entry->content = SNDRV_INFO_CONTENT_TEXT;
2958 entry->mode = S_IFREG | S_IRUGO | S_IWUSR;
2959 entry->c.text.read = snd_pcm_oss_proc_read;
2960 entry->c.text.write = snd_pcm_oss_proc_write;
2961 entry->private_data = pstr;
2962 if (snd_info_register(entry) < 0) {
2963 snd_info_free_entry(entry);
2967 pstr->oss.proc_entry = entry;
2971 static void snd_pcm_oss_proc_done(struct snd_pcm *pcm)
2974 for (stream = 0; stream < 2; ++stream) {
2975 struct snd_pcm_str *pstr = &pcm->streams[stream];
2976 snd_info_free_entry(pstr->oss.proc_entry);
2977 pstr->oss.proc_entry = NULL;
2978 snd_pcm_oss_proc_free_setup_list(pstr);
2981 #else /* !CONFIG_SND_VERBOSE_PROCFS */
2982 #define snd_pcm_oss_proc_init(pcm)
2983 #define snd_pcm_oss_proc_done(pcm)
2984 #endif /* CONFIG_SND_VERBOSE_PROCFS */
2990 static const struct file_operations snd_pcm_oss_f_reg =
2992 .owner = THIS_MODULE,
2993 .read = snd_pcm_oss_read,
2994 .write = snd_pcm_oss_write,
2995 .open = snd_pcm_oss_open,
2996 .release = snd_pcm_oss_release,
2997 .llseek = no_llseek,
2998 .poll = snd_pcm_oss_poll,
2999 .unlocked_ioctl = snd_pcm_oss_ioctl,
3000 .compat_ioctl = snd_pcm_oss_ioctl_compat,
3001 .mmap = snd_pcm_oss_mmap,
3004 static void register_oss_dsp(struct snd_pcm *pcm, int index)
3006 if (snd_register_oss_device(SNDRV_OSS_DEVICE_TYPE_PCM,
3007 pcm->card, index, &snd_pcm_oss_f_reg,
3009 pcm_err(pcm, "unable to register OSS PCM device %i:%i\n",
3010 pcm->card->number, pcm->device);
3014 static int snd_pcm_oss_register_minor(struct snd_pcm *pcm)
3017 if (dsp_map[pcm->card->number] == (int)pcm->device) {
3020 register_oss_dsp(pcm, 0);
3021 duplex = (pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream_count > 0 &&
3022 pcm->streams[SNDRV_PCM_STREAM_CAPTURE].substream_count &&
3023 !(pcm->info_flags & SNDRV_PCM_INFO_HALF_DUPLEX));
3024 sprintf(name, "%s%s", pcm->name, duplex ? " (DUPLEX)" : "");
3025 #ifdef SNDRV_OSS_INFO_DEV_AUDIO
3026 snd_oss_info_register(SNDRV_OSS_INFO_DEV_AUDIO,
3031 pcm->oss.reg_mask |= 1;
3033 if (adsp_map[pcm->card->number] == (int)pcm->device) {
3034 register_oss_dsp(pcm, 1);
3036 pcm->oss.reg_mask |= 2;
3040 snd_pcm_oss_proc_init(pcm);
3045 static int snd_pcm_oss_disconnect_minor(struct snd_pcm *pcm)
3048 if (pcm->oss.reg_mask & 1) {
3049 pcm->oss.reg_mask &= ~1;
3050 snd_unregister_oss_device(SNDRV_OSS_DEVICE_TYPE_PCM,
3053 if (pcm->oss.reg_mask & 2) {
3054 pcm->oss.reg_mask &= ~2;
3055 snd_unregister_oss_device(SNDRV_OSS_DEVICE_TYPE_PCM,
3058 if (dsp_map[pcm->card->number] == (int)pcm->device) {
3059 #ifdef SNDRV_OSS_INFO_DEV_AUDIO
3060 snd_oss_info_unregister(SNDRV_OSS_INFO_DEV_AUDIO, pcm->card->number);
3068 static int snd_pcm_oss_unregister_minor(struct snd_pcm *pcm)
3070 snd_pcm_oss_disconnect_minor(pcm);
3071 snd_pcm_oss_proc_done(pcm);
3075 static struct snd_pcm_notify snd_pcm_oss_notify =
3077 .n_register = snd_pcm_oss_register_minor,
3078 .n_disconnect = snd_pcm_oss_disconnect_minor,
3079 .n_unregister = snd_pcm_oss_unregister_minor,
3082 static int __init alsa_pcm_oss_init(void)
3087 /* check device map table */
3088 for (i = 0; i < SNDRV_CARDS; i++) {
3089 if (dsp_map[i] < 0 || dsp_map[i] >= SNDRV_PCM_DEVICES) {
3090 pr_err("ALSA: pcm_oss: invalid dsp_map[%d] = %d\n",
3094 if (adsp_map[i] < 0 || adsp_map[i] >= SNDRV_PCM_DEVICES) {
3095 pr_err("ALSA: pcm_oss: invalid adsp_map[%d] = %d\n",
3100 if ((err = snd_pcm_notify(&snd_pcm_oss_notify, 0)) < 0)
3105 static void __exit alsa_pcm_oss_exit(void)
3107 snd_pcm_notify(&snd_pcm_oss_notify, 1);
3110 module_init(alsa_pcm_oss_init)
3111 module_exit(alsa_pcm_oss_exit)