2 * Digital Audio (PCM) abstract layer / OSS compatible
3 * Copyright (c) by Jaroslav Kysela <perex@suse.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 <sound/driver.h>
30 #include <linux/init.h>
31 #include <linux/smp_lock.h>
32 #include <linux/slab.h>
33 #include <linux/time.h>
34 #include <linux/vmalloc.h>
35 #include <linux/moduleparam.h>
36 #include <linux/string.h>
37 #include <sound/core.h>
38 #include <sound/minors.h>
39 #include <sound/pcm.h>
40 #include <sound/pcm_params.h>
41 #include "pcm_plugin.h"
42 #include <sound/info.h>
43 #include <linux/soundcard.h>
44 #include <sound/initval.h>
46 #define OSS_ALSAEMULVER _SIOR ('M', 249, int)
48 static int dsp_map[SNDRV_CARDS] = {[0 ... (SNDRV_CARDS-1)] = 0};
49 static int adsp_map[SNDRV_CARDS] = {[0 ... (SNDRV_CARDS-1)] = 1};
50 static int nonblock_open = 1;
52 MODULE_AUTHOR("Jaroslav Kysela <perex@suse.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 extern int snd_mixer_oss_ioctl_card(snd_card_t *card, unsigned int cmd, unsigned long arg);
65 static int snd_pcm_oss_get_rate(snd_pcm_oss_file_t *pcm_oss_file);
66 static int snd_pcm_oss_get_channels(snd_pcm_oss_file_t *pcm_oss_file);
67 static int snd_pcm_oss_get_format(snd_pcm_oss_file_t *pcm_oss_file);
69 static inline mm_segment_t snd_enter_user(void)
71 mm_segment_t fs = get_fs();
76 static inline void snd_leave_user(mm_segment_t fs)
81 static int snd_pcm_oss_plugin_clear(snd_pcm_substream_t *substream)
83 snd_pcm_runtime_t *runtime = substream->runtime;
84 snd_pcm_plugin_t *plugin, *next;
86 plugin = runtime->oss.plugin_first;
89 snd_pcm_plugin_free(plugin);
92 runtime->oss.plugin_first = runtime->oss.plugin_last = NULL;
96 static int snd_pcm_plugin_insert(snd_pcm_plugin_t *plugin)
98 snd_pcm_runtime_t *runtime = plugin->plug->runtime;
99 plugin->next = runtime->oss.plugin_first;
101 if (runtime->oss.plugin_first) {
102 runtime->oss.plugin_first->prev = plugin;
103 runtime->oss.plugin_first = plugin;
105 runtime->oss.plugin_last =
106 runtime->oss.plugin_first = plugin;
111 int snd_pcm_plugin_append(snd_pcm_plugin_t *plugin)
113 snd_pcm_runtime_t *runtime = plugin->plug->runtime;
115 plugin->prev = runtime->oss.plugin_last;
116 if (runtime->oss.plugin_last) {
117 runtime->oss.plugin_last->next = plugin;
118 runtime->oss.plugin_last = plugin;
120 runtime->oss.plugin_last =
121 runtime->oss.plugin_first = plugin;
126 static long snd_pcm_oss_bytes(snd_pcm_substream_t *substream, long frames)
128 snd_pcm_runtime_t *runtime = substream->runtime;
129 long buffer_size = snd_pcm_lib_buffer_bytes(substream);
130 long bytes = frames_to_bytes(runtime, frames);
131 if (buffer_size == runtime->oss.buffer_bytes)
133 #if BITS_PER_LONG >= 64
134 return runtime->oss.buffer_bytes * bytes / buffer_size;
137 u64 bsize = (u64)runtime->oss.buffer_bytes * (u64)bytes;
139 div64_32(&bsize, buffer_size, &rem);
145 static long snd_pcm_alsa_frames(snd_pcm_substream_t *substream, long bytes)
147 snd_pcm_runtime_t *runtime = substream->runtime;
148 long buffer_size = snd_pcm_lib_buffer_bytes(substream);
149 if (buffer_size == runtime->oss.buffer_bytes)
150 return bytes_to_frames(runtime, bytes);
151 return bytes_to_frames(runtime, (buffer_size * bytes) / runtime->oss.buffer_bytes);
154 static int snd_pcm_oss_format_from(int format)
157 case AFMT_MU_LAW: return SNDRV_PCM_FORMAT_MU_LAW;
158 case AFMT_A_LAW: return SNDRV_PCM_FORMAT_A_LAW;
159 case AFMT_IMA_ADPCM: return SNDRV_PCM_FORMAT_IMA_ADPCM;
160 case AFMT_U8: return SNDRV_PCM_FORMAT_U8;
161 case AFMT_S16_LE: return SNDRV_PCM_FORMAT_S16_LE;
162 case AFMT_S16_BE: return SNDRV_PCM_FORMAT_S16_BE;
163 case AFMT_S8: return SNDRV_PCM_FORMAT_S8;
164 case AFMT_U16_LE: return SNDRV_PCM_FORMAT_U16_LE;
165 case AFMT_U16_BE: return SNDRV_PCM_FORMAT_U16_BE;
166 case AFMT_MPEG: return SNDRV_PCM_FORMAT_MPEG;
167 default: return SNDRV_PCM_FORMAT_U8;
171 static int snd_pcm_oss_format_to(int format)
174 case SNDRV_PCM_FORMAT_MU_LAW: return AFMT_MU_LAW;
175 case SNDRV_PCM_FORMAT_A_LAW: return AFMT_A_LAW;
176 case SNDRV_PCM_FORMAT_IMA_ADPCM: return AFMT_IMA_ADPCM;
177 case SNDRV_PCM_FORMAT_U8: return AFMT_U8;
178 case SNDRV_PCM_FORMAT_S16_LE: return AFMT_S16_LE;
179 case SNDRV_PCM_FORMAT_S16_BE: return AFMT_S16_BE;
180 case SNDRV_PCM_FORMAT_S8: return AFMT_S8;
181 case SNDRV_PCM_FORMAT_U16_LE: return AFMT_U16_LE;
182 case SNDRV_PCM_FORMAT_U16_BE: return AFMT_U16_BE;
183 case SNDRV_PCM_FORMAT_MPEG: return AFMT_MPEG;
184 default: return -EINVAL;
188 static int snd_pcm_oss_period_size(snd_pcm_substream_t *substream,
189 snd_pcm_hw_params_t *oss_params,
190 snd_pcm_hw_params_t *slave_params)
193 size_t oss_buffer_size, oss_period_size, oss_periods;
194 size_t min_period_size, max_period_size;
195 snd_pcm_runtime_t *runtime = substream->runtime;
196 size_t oss_frame_size;
198 oss_frame_size = snd_pcm_format_physical_width(params_format(oss_params)) *
199 params_channels(oss_params) / 8;
201 oss_buffer_size = snd_pcm_plug_client_size(substream,
202 snd_pcm_hw_param_value_max(slave_params, SNDRV_PCM_HW_PARAM_BUFFER_SIZE, NULL)) * oss_frame_size;
203 oss_buffer_size = 1 << ld2(oss_buffer_size);
204 if (atomic_read(&runtime->mmap_count)) {
205 if (oss_buffer_size > runtime->oss.mmap_bytes)
206 oss_buffer_size = runtime->oss.mmap_bytes;
209 if (substream->oss.setup &&
210 substream->oss.setup->period_size > 16)
211 oss_period_size = substream->oss.setup->period_size;
212 else if (runtime->oss.fragshift) {
213 oss_period_size = 1 << runtime->oss.fragshift;
214 if (oss_period_size > oss_buffer_size / 2)
215 oss_period_size = oss_buffer_size / 2;
218 size_t bytes_per_sec = params_rate(oss_params) * snd_pcm_format_physical_width(params_format(oss_params)) * params_channels(oss_params) / 8;
220 oss_period_size = oss_buffer_size;
222 oss_period_size /= 2;
223 } while (oss_period_size > bytes_per_sec);
224 if (runtime->oss.subdivision == 0) {
226 if (oss_period_size / sd > 4096)
228 if (oss_period_size / sd < 4096)
231 sd = runtime->oss.subdivision;
232 oss_period_size /= sd;
233 if (oss_period_size < 16)
234 oss_period_size = 16;
237 min_period_size = snd_pcm_plug_client_size(substream,
238 snd_pcm_hw_param_value_min(slave_params, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, NULL));
239 min_period_size *= oss_frame_size;
240 min_period_size = 1 << (ld2(min_period_size - 1) + 1);
241 if (oss_period_size < min_period_size)
242 oss_period_size = min_period_size;
244 max_period_size = snd_pcm_plug_client_size(substream,
245 snd_pcm_hw_param_value_max(slave_params, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, NULL));
246 max_period_size *= oss_frame_size;
247 max_period_size = 1 << ld2(max_period_size);
248 if (oss_period_size > max_period_size)
249 oss_period_size = max_period_size;
251 oss_periods = oss_buffer_size / oss_period_size;
253 if (substream->oss.setup) {
254 if (substream->oss.setup->periods > 1)
255 oss_periods = substream->oss.setup->periods;
258 s = snd_pcm_hw_param_value_max(slave_params, SNDRV_PCM_HW_PARAM_PERIODS, NULL);
259 if (runtime->oss.maxfrags && s > runtime->oss.maxfrags)
260 s = runtime->oss.maxfrags;
264 s = snd_pcm_hw_param_value_min(slave_params, SNDRV_PCM_HW_PARAM_PERIODS, NULL);
270 while (oss_period_size * oss_periods > oss_buffer_size)
271 oss_period_size /= 2;
273 snd_assert(oss_period_size >= 16, return -EINVAL);
274 runtime->oss.period_bytes = oss_period_size;
275 runtime->oss.period_frames = 1;
276 runtime->oss.periods = oss_periods;
280 static int choose_rate(snd_pcm_substream_t *substream,
281 snd_pcm_hw_params_t *params, unsigned int best_rate)
284 snd_pcm_hw_params_t *save;
285 unsigned int rate, prev;
287 save = kmalloc(sizeof(*save), GFP_KERNEL);
291 it = hw_param_interval(save, SNDRV_PCM_HW_PARAM_RATE);
293 /* try multiples of the best rate */
296 if (it->max < rate || (it->max == rate && it->openmax))
298 if (it->min < rate || (it->min == rate && !it->openmin)) {
300 ret = snd_pcm_hw_param_set(substream, params,
301 SNDRV_PCM_HW_PARAM_RATE,
303 if (ret == (int)rate) {
315 /* not found, use the nearest rate */
317 return snd_pcm_hw_param_near(substream, params, SNDRV_PCM_HW_PARAM_RATE, best_rate, NULL);
320 static int snd_pcm_oss_change_params(snd_pcm_substream_t *substream)
322 snd_pcm_runtime_t *runtime = substream->runtime;
323 snd_pcm_hw_params_t *params, *sparams;
324 snd_pcm_sw_params_t *sw_params;
325 ssize_t oss_buffer_size, oss_period_size;
326 size_t oss_frame_size;
329 int format, sformat, n;
330 snd_mask_t sformat_mask;
333 sw_params = kmalloc(sizeof(*sw_params), GFP_KERNEL);
334 params = kmalloc(sizeof(*params), GFP_KERNEL);
335 sparams = kmalloc(sizeof(*sparams), GFP_KERNEL);
336 if (!sw_params || !params || !sparams) {
337 snd_printd("No memory\n");
342 if (atomic_read(&runtime->mmap_count)) {
345 snd_pcm_oss_setup_t *setup = substream->oss.setup;
346 direct = (setup != NULL && setup->direct);
349 _snd_pcm_hw_params_any(sparams);
350 _snd_pcm_hw_param_setinteger(sparams, SNDRV_PCM_HW_PARAM_PERIODS);
351 _snd_pcm_hw_param_min(sparams, SNDRV_PCM_HW_PARAM_PERIODS, 2, 0);
352 snd_mask_none(&mask);
353 if (atomic_read(&runtime->mmap_count))
354 snd_mask_set(&mask, SNDRV_PCM_ACCESS_MMAP_INTERLEAVED);
356 snd_mask_set(&mask, SNDRV_PCM_ACCESS_RW_INTERLEAVED);
358 snd_mask_set(&mask, SNDRV_PCM_ACCESS_RW_NONINTERLEAVED);
360 err = snd_pcm_hw_param_mask(substream, sparams, SNDRV_PCM_HW_PARAM_ACCESS, &mask);
362 snd_printd("No usable accesses\n");
366 choose_rate(substream, sparams, runtime->oss.rate);
367 snd_pcm_hw_param_near(substream, sparams, SNDRV_PCM_HW_PARAM_CHANNELS, runtime->oss.channels, NULL);
369 format = snd_pcm_oss_format_from(runtime->oss.format);
371 sformat_mask = *hw_param_mask(sparams, SNDRV_PCM_HW_PARAM_FORMAT);
375 sformat = snd_pcm_plug_slave_format(format, &sformat_mask);
377 if (sformat < 0 || !snd_mask_test(&sformat_mask, sformat)) {
378 for (sformat = 0; sformat <= SNDRV_PCM_FORMAT_LAST; sformat++) {
379 if (snd_mask_test(&sformat_mask, sformat) &&
380 snd_pcm_oss_format_to(sformat) >= 0)
383 if (sformat > SNDRV_PCM_FORMAT_LAST) {
384 snd_printd("Cannot find a format!!!\n");
389 err = _snd_pcm_hw_param_set(sparams, SNDRV_PCM_HW_PARAM_FORMAT, sformat, 0);
390 snd_assert(err >= 0, goto failure);
393 memcpy(params, sparams, sizeof(*params));
395 _snd_pcm_hw_params_any(params);
396 _snd_pcm_hw_param_set(params, SNDRV_PCM_HW_PARAM_ACCESS,
397 SNDRV_PCM_ACCESS_RW_INTERLEAVED, 0);
398 _snd_pcm_hw_param_set(params, SNDRV_PCM_HW_PARAM_FORMAT,
399 snd_pcm_oss_format_from(runtime->oss.format), 0);
400 _snd_pcm_hw_param_set(params, SNDRV_PCM_HW_PARAM_CHANNELS,
401 runtime->oss.channels, 0);
402 _snd_pcm_hw_param_set(params, SNDRV_PCM_HW_PARAM_RATE,
403 runtime->oss.rate, 0);
404 pdprintf("client: access = %i, format = %i, channels = %i, rate = %i\n",
405 params_access(params), params_format(params),
406 params_channels(params), params_rate(params));
408 pdprintf("slave: access = %i, format = %i, channels = %i, rate = %i\n",
409 params_access(sparams), params_format(sparams),
410 params_channels(sparams), params_rate(sparams));
412 oss_frame_size = snd_pcm_format_physical_width(params_format(params)) *
413 params_channels(params) / 8;
415 snd_pcm_oss_plugin_clear(substream);
417 /* add necessary plugins */
418 snd_pcm_oss_plugin_clear(substream);
419 if ((err = snd_pcm_plug_format_plugins(substream,
422 snd_printd("snd_pcm_plug_format_plugins failed: %i\n", err);
423 snd_pcm_oss_plugin_clear(substream);
426 if (runtime->oss.plugin_first) {
427 snd_pcm_plugin_t *plugin;
428 if ((err = snd_pcm_plugin_build_io(substream, sparams, &plugin)) < 0) {
429 snd_printd("snd_pcm_plugin_build_io failed: %i\n", err);
430 snd_pcm_oss_plugin_clear(substream);
433 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
434 err = snd_pcm_plugin_append(plugin);
436 err = snd_pcm_plugin_insert(plugin);
439 snd_pcm_oss_plugin_clear(substream);
445 err = snd_pcm_oss_period_size(substream, params, sparams);
449 n = snd_pcm_plug_slave_size(substream, runtime->oss.period_bytes / oss_frame_size);
450 err = snd_pcm_hw_param_near(substream, sparams, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, n, NULL);
451 snd_assert(err >= 0, goto failure);
453 err = snd_pcm_hw_param_near(substream, sparams, SNDRV_PCM_HW_PARAM_PERIODS,
454 runtime->oss.periods, NULL);
455 snd_assert(err >= 0, goto failure);
457 snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DROP, NULL);
459 if ((err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_HW_PARAMS, sparams)) < 0) {
460 snd_printd("HW_PARAMS failed: %i\n", err);
464 memset(sw_params, 0, sizeof(*sw_params));
465 if (runtime->oss.trigger) {
466 sw_params->start_threshold = 1;
468 sw_params->start_threshold = runtime->boundary;
470 if (atomic_read(&runtime->mmap_count) || substream->stream == SNDRV_PCM_STREAM_CAPTURE)
471 sw_params->stop_threshold = runtime->boundary;
473 sw_params->stop_threshold = runtime->buffer_size;
474 sw_params->tstamp_mode = SNDRV_PCM_TSTAMP_NONE;
475 sw_params->period_step = 1;
476 sw_params->sleep_min = 0;
477 sw_params->avail_min = substream->stream == SNDRV_PCM_STREAM_PLAYBACK ?
478 1 : runtime->period_size;
479 sw_params->xfer_align = 1;
480 if (atomic_read(&runtime->mmap_count) ||
481 (substream->oss.setup && substream->oss.setup->nosilence)) {
482 sw_params->silence_threshold = 0;
483 sw_params->silence_size = 0;
485 snd_pcm_uframes_t frames;
486 frames = runtime->period_size + 16;
487 if (frames > runtime->buffer_size)
488 frames = runtime->buffer_size;
489 sw_params->silence_threshold = frames;
490 sw_params->silence_size = frames;
493 if ((err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_SW_PARAMS, sw_params)) < 0) {
494 snd_printd("SW_PARAMS failed: %i\n", err);
498 runtime->oss.periods = params_periods(sparams);
499 oss_period_size = snd_pcm_plug_client_size(substream, params_period_size(sparams));
500 snd_assert(oss_period_size >= 0, err = -EINVAL; goto failure);
501 if (runtime->oss.plugin_first) {
502 err = snd_pcm_plug_alloc(substream, oss_period_size);
506 oss_period_size *= oss_frame_size;
508 oss_buffer_size = oss_period_size * runtime->oss.periods;
509 snd_assert(oss_buffer_size >= 0, err = -EINVAL; goto failure);
511 runtime->oss.period_bytes = oss_period_size;
512 runtime->oss.buffer_bytes = oss_buffer_size;
514 pdprintf("oss: period bytes = %i, buffer bytes = %i\n",
515 runtime->oss.period_bytes,
516 runtime->oss.buffer_bytes);
517 pdprintf("slave: period_size = %i, buffer_size = %i\n",
518 params_period_size(sparams),
519 params_buffer_size(sparams));
521 runtime->oss.format = snd_pcm_oss_format_to(params_format(params));
522 runtime->oss.channels = params_channels(params);
523 runtime->oss.rate = params_rate(params);
525 runtime->oss.params = 0;
526 runtime->oss.prepare = 1;
527 vfree(runtime->oss.buffer);
528 runtime->oss.buffer = vmalloc(runtime->oss.period_bytes);
529 runtime->oss.buffer_used = 0;
530 if (runtime->dma_area)
531 snd_pcm_format_set_silence(runtime->format, runtime->dma_area, bytes_to_samples(runtime, runtime->dma_bytes));
533 runtime->oss.period_frames = snd_pcm_alsa_frames(substream, oss_period_size);
543 static int snd_pcm_oss_get_active_substream(snd_pcm_oss_file_t *pcm_oss_file, snd_pcm_substream_t **r_substream)
546 snd_pcm_substream_t *asubstream = NULL, *substream;
548 for (idx = 0; idx < 2; idx++) {
549 substream = pcm_oss_file->streams[idx];
550 if (substream == NULL)
552 if (asubstream == NULL)
553 asubstream = substream;
554 if (substream->runtime->oss.params) {
555 err = snd_pcm_oss_change_params(substream);
560 snd_assert(asubstream != NULL, return -EIO);
562 *r_substream = asubstream;
566 static int snd_pcm_oss_prepare(snd_pcm_substream_t *substream)
569 snd_pcm_runtime_t *runtime = substream->runtime;
571 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_PREPARE, NULL);
573 snd_printd("snd_pcm_oss_prepare: SNDRV_PCM_IOCTL_PREPARE failed\n");
576 runtime->oss.prepare = 0;
577 runtime->oss.prev_hw_ptr_interrupt = 0;
578 runtime->oss.period_ptr = 0;
579 runtime->oss.buffer_used = 0;
584 static int snd_pcm_oss_make_ready(snd_pcm_substream_t *substream)
586 snd_pcm_runtime_t *runtime;
589 if (substream == NULL)
591 runtime = substream->runtime;
592 if (runtime->oss.params) {
593 err = snd_pcm_oss_change_params(substream);
597 if (runtime->oss.prepare) {
598 err = snd_pcm_oss_prepare(substream);
605 static int snd_pcm_oss_capture_position_fixup(snd_pcm_substream_t *substream, snd_pcm_sframes_t *delay)
607 snd_pcm_runtime_t *runtime;
608 snd_pcm_uframes_t frames;
612 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DELAY, delay);
615 runtime = substream->runtime;
616 if (*delay <= (snd_pcm_sframes_t)runtime->buffer_size)
618 /* in case of overrun, skip whole periods like OSS/Linux driver does */
619 /* until avail(delay) <= buffer_size */
620 frames = (*delay - runtime->buffer_size) + runtime->period_size - 1;
621 frames /= runtime->period_size;
622 frames *= runtime->period_size;
623 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_FORWARD, &frames);
630 snd_pcm_sframes_t snd_pcm_oss_write3(snd_pcm_substream_t *substream, const char *ptr, snd_pcm_uframes_t frames, int in_kernel)
632 snd_pcm_runtime_t *runtime = substream->runtime;
635 if (runtime->status->state == SNDRV_PCM_STATE_XRUN ||
636 runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) {
638 if (runtime->status->state == SNDRV_PCM_STATE_XRUN)
639 printk("pcm_oss: write: recovering from XRUN\n");
641 printk("pcm_oss: write: recovering from SUSPEND\n");
643 ret = snd_pcm_oss_prepare(substream);
649 fs = snd_enter_user();
650 ret = snd_pcm_lib_write(substream, (void __user *)ptr, frames);
653 ret = snd_pcm_lib_write(substream, (void __user *)ptr, frames);
655 if (ret != -EPIPE && ret != -ESTRPIPE)
657 /* test, if we can't store new data, because the stream */
658 /* has not been started */
659 if (runtime->status->state == SNDRV_PCM_STATE_PREPARED)
665 snd_pcm_sframes_t snd_pcm_oss_read3(snd_pcm_substream_t *substream, char *ptr, snd_pcm_uframes_t frames, int in_kernel)
667 snd_pcm_runtime_t *runtime = substream->runtime;
668 snd_pcm_sframes_t delay;
671 if (runtime->status->state == SNDRV_PCM_STATE_XRUN ||
672 runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) {
674 if (runtime->status->state == SNDRV_PCM_STATE_XRUN)
675 printk("pcm_oss: read: recovering from XRUN\n");
677 printk("pcm_oss: read: recovering from SUSPEND\n");
679 ret = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DRAIN, NULL);
682 } else if (runtime->status->state == SNDRV_PCM_STATE_SETUP) {
683 ret = snd_pcm_oss_prepare(substream);
687 ret = snd_pcm_oss_capture_position_fixup(substream, &delay);
692 fs = snd_enter_user();
693 ret = snd_pcm_lib_read(substream, (void __user *)ptr, frames);
696 ret = snd_pcm_lib_read(substream, (void __user *)ptr, frames);
699 if (runtime->status->state == SNDRV_PCM_STATE_DRAINING) {
700 ret = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DROP, NULL);
706 if (ret != -ESTRPIPE)
712 snd_pcm_sframes_t snd_pcm_oss_writev3(snd_pcm_substream_t *substream, void **bufs, snd_pcm_uframes_t frames, int in_kernel)
714 snd_pcm_runtime_t *runtime = substream->runtime;
717 if (runtime->status->state == SNDRV_PCM_STATE_XRUN ||
718 runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) {
720 if (runtime->status->state == SNDRV_PCM_STATE_XRUN)
721 printk("pcm_oss: writev: recovering from XRUN\n");
723 printk("pcm_oss: writev: recovering from SUSPEND\n");
725 ret = snd_pcm_oss_prepare(substream);
731 fs = snd_enter_user();
732 ret = snd_pcm_lib_writev(substream, (void __user **)bufs, frames);
735 ret = snd_pcm_lib_writev(substream, (void __user **)bufs, frames);
737 if (ret != -EPIPE && ret != -ESTRPIPE)
740 /* test, if we can't store new data, because the stream */
741 /* has not been started */
742 if (runtime->status->state == SNDRV_PCM_STATE_PREPARED)
748 snd_pcm_sframes_t snd_pcm_oss_readv3(snd_pcm_substream_t *substream, void **bufs, snd_pcm_uframes_t frames, int in_kernel)
750 snd_pcm_runtime_t *runtime = substream->runtime;
753 if (runtime->status->state == SNDRV_PCM_STATE_XRUN ||
754 runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) {
756 if (runtime->status->state == SNDRV_PCM_STATE_XRUN)
757 printk("pcm_oss: readv: recovering from XRUN\n");
759 printk("pcm_oss: readv: recovering from SUSPEND\n");
761 ret = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DRAIN, NULL);
764 } else if (runtime->status->state == SNDRV_PCM_STATE_SETUP) {
765 ret = snd_pcm_oss_prepare(substream);
771 fs = snd_enter_user();
772 ret = snd_pcm_lib_readv(substream, (void __user **)bufs, frames);
775 ret = snd_pcm_lib_readv(substream, (void __user **)bufs, frames);
777 if (ret != -EPIPE && ret != -ESTRPIPE)
783 static ssize_t snd_pcm_oss_write2(snd_pcm_substream_t *substream, const char *buf, size_t bytes, int in_kernel)
785 snd_pcm_runtime_t *runtime = substream->runtime;
786 snd_pcm_sframes_t frames, frames1;
787 if (runtime->oss.plugin_first) {
788 snd_pcm_plugin_channel_t *channels;
789 size_t oss_frame_bytes = (runtime->oss.plugin_first->src_width * runtime->oss.plugin_first->src_format.channels) / 8;
791 if (copy_from_user(runtime->oss.buffer, (const char __user *)buf, bytes))
793 buf = runtime->oss.buffer;
795 frames = bytes / oss_frame_bytes;
796 frames1 = snd_pcm_plug_client_channels_buf(substream, (char *)buf, frames, &channels);
799 frames1 = snd_pcm_plug_write_transfer(substream, channels, frames1);
802 bytes = frames1 * oss_frame_bytes;
804 frames = bytes_to_frames(runtime, bytes);
805 frames1 = snd_pcm_oss_write3(substream, buf, frames, in_kernel);
808 bytes = frames_to_bytes(runtime, frames1);
813 static ssize_t snd_pcm_oss_write1(snd_pcm_substream_t *substream, const char __user *buf, size_t bytes)
817 snd_pcm_runtime_t *runtime = substream->runtime;
819 if (atomic_read(&runtime->mmap_count))
822 if ((tmp = snd_pcm_oss_make_ready(substream)) < 0)
825 if (bytes < runtime->oss.period_bytes || runtime->oss.buffer_used > 0) {
827 if (tmp + runtime->oss.buffer_used > runtime->oss.period_bytes)
828 tmp = runtime->oss.period_bytes - runtime->oss.buffer_used;
830 if (copy_from_user(runtime->oss.buffer + runtime->oss.buffer_used, buf, tmp))
831 return xfer > 0 ? (snd_pcm_sframes_t)xfer : -EFAULT;
833 runtime->oss.buffer_used += tmp;
837 if ((substream->oss.setup != NULL && substream->oss.setup->partialfrag) ||
838 runtime->oss.buffer_used == runtime->oss.period_bytes) {
839 tmp = snd_pcm_oss_write2(substream, runtime->oss.buffer + runtime->oss.period_ptr,
840 runtime->oss.buffer_used - runtime->oss.period_ptr, 1);
842 return xfer > 0 ? (snd_pcm_sframes_t)xfer : tmp;
843 runtime->oss.bytes += tmp;
844 runtime->oss.period_ptr += tmp;
845 runtime->oss.period_ptr %= runtime->oss.period_bytes;
846 if (runtime->oss.period_ptr == 0 ||
847 runtime->oss.period_ptr == runtime->oss.buffer_used)
848 runtime->oss.buffer_used = 0;
849 else if ((substream->ffile->f_flags & O_NONBLOCK) != 0)
850 return xfer > 0 ? xfer : -EAGAIN;
853 tmp = snd_pcm_oss_write2(substream, (const char *)buf, runtime->oss.period_bytes, 0);
855 return xfer > 0 ? (snd_pcm_sframes_t)xfer : tmp;
856 runtime->oss.bytes += tmp;
860 if ((substream->ffile->f_flags & O_NONBLOCK) != 0 &&
861 tmp != runtime->oss.period_bytes)
868 static ssize_t snd_pcm_oss_read2(snd_pcm_substream_t *substream, char *buf, size_t bytes, int in_kernel)
870 snd_pcm_runtime_t *runtime = substream->runtime;
871 snd_pcm_sframes_t frames, frames1;
872 char __user *final_dst = (char __user *)buf;
873 if (runtime->oss.plugin_first) {
874 snd_pcm_plugin_channel_t *channels;
875 size_t oss_frame_bytes = (runtime->oss.plugin_last->dst_width * runtime->oss.plugin_last->dst_format.channels) / 8;
877 buf = runtime->oss.buffer;
878 frames = bytes / oss_frame_bytes;
879 frames1 = snd_pcm_plug_client_channels_buf(substream, buf, frames, &channels);
882 frames1 = snd_pcm_plug_read_transfer(substream, channels, frames1);
885 bytes = frames1 * oss_frame_bytes;
886 if (!in_kernel && copy_to_user(final_dst, buf, bytes))
889 frames = bytes_to_frames(runtime, bytes);
890 frames1 = snd_pcm_oss_read3(substream, buf, frames, in_kernel);
893 bytes = frames_to_bytes(runtime, frames1);
898 static ssize_t snd_pcm_oss_read1(snd_pcm_substream_t *substream, char __user *buf, size_t bytes)
902 snd_pcm_runtime_t *runtime = substream->runtime;
904 if (atomic_read(&runtime->mmap_count))
907 if ((tmp = snd_pcm_oss_make_ready(substream)) < 0)
910 if (bytes < runtime->oss.period_bytes || runtime->oss.buffer_used > 0) {
911 if (runtime->oss.buffer_used == 0) {
912 tmp = snd_pcm_oss_read2(substream, runtime->oss.buffer, runtime->oss.period_bytes, 1);
914 return xfer > 0 ? (snd_pcm_sframes_t)xfer : tmp;
915 runtime->oss.bytes += tmp;
916 runtime->oss.period_ptr = tmp;
917 runtime->oss.buffer_used = tmp;
920 if ((size_t) tmp > runtime->oss.buffer_used)
921 tmp = runtime->oss.buffer_used;
922 if (copy_to_user(buf, runtime->oss.buffer + (runtime->oss.period_ptr - runtime->oss.buffer_used), tmp))
923 return xfer > 0 ? (snd_pcm_sframes_t)xfer : -EFAULT;
927 runtime->oss.buffer_used -= tmp;
929 tmp = snd_pcm_oss_read2(substream, (char *)buf, runtime->oss.period_bytes, 0);
931 return xfer > 0 ? (snd_pcm_sframes_t)xfer : tmp;
932 runtime->oss.bytes += tmp;
941 static int snd_pcm_oss_reset(snd_pcm_oss_file_t *pcm_oss_file)
943 snd_pcm_substream_t *substream;
945 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
946 if (substream != NULL) {
947 snd_pcm_kernel_playback_ioctl(substream, SNDRV_PCM_IOCTL_DROP, NULL);
948 substream->runtime->oss.prepare = 1;
950 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
951 if (substream != NULL) {
952 snd_pcm_kernel_capture_ioctl(substream, SNDRV_PCM_IOCTL_DROP, NULL);
953 substream->runtime->oss.prepare = 1;
958 static int snd_pcm_oss_post(snd_pcm_oss_file_t *pcm_oss_file)
960 snd_pcm_substream_t *substream;
963 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
964 if (substream != NULL) {
965 if ((err = snd_pcm_oss_make_ready(substream)) < 0)
967 snd_pcm_kernel_playback_ioctl(substream, SNDRV_PCM_IOCTL_START, NULL);
969 /* note: all errors from the start action are ignored */
970 /* OSS apps do not know, how to handle them */
974 static int snd_pcm_oss_sync1(snd_pcm_substream_t *substream, size_t size)
976 snd_pcm_runtime_t *runtime;
981 runtime = substream->runtime;
982 init_waitqueue_entry(&wait, current);
983 add_wait_queue(&runtime->sleep, &wait);
985 printk("sync1: size = %li\n", size);
988 result = snd_pcm_oss_write2(substream, runtime->oss.buffer, size, 1);
990 runtime->oss.buffer_used = 0;
994 if (result != 0 && result != -EAGAIN)
997 set_current_state(TASK_INTERRUPTIBLE);
998 snd_pcm_stream_lock_irq(substream);
999 res = runtime->status->state;
1000 snd_pcm_stream_unlock_irq(substream);
1001 if (res != SNDRV_PCM_STATE_RUNNING) {
1002 set_current_state(TASK_RUNNING);
1005 res = schedule_timeout(10 * HZ);
1006 if (signal_pending(current)) {
1007 result = -ERESTARTSYS;
1011 snd_printk(KERN_ERR "OSS sync error - DMA timeout\n");
1016 remove_wait_queue(&runtime->sleep, &wait);
1020 static int snd_pcm_oss_sync(snd_pcm_oss_file_t *pcm_oss_file)
1023 unsigned int saved_f_flags;
1024 snd_pcm_substream_t *substream;
1025 snd_pcm_runtime_t *runtime;
1026 snd_pcm_format_t format;
1027 unsigned long width;
1030 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
1031 if (substream != NULL) {
1032 runtime = substream->runtime;
1033 if (atomic_read(&runtime->mmap_count))
1035 if ((err = snd_pcm_oss_make_ready(substream)) < 0)
1037 format = snd_pcm_oss_format_from(runtime->oss.format);
1038 width = snd_pcm_format_physical_width(format);
1039 if (runtime->oss.buffer_used > 0) {
1041 printk("sync: buffer_used\n");
1043 size = (8 * (runtime->oss.period_bytes - runtime->oss.buffer_used) + 7) / width;
1044 snd_pcm_format_set_silence(format,
1045 runtime->oss.buffer + runtime->oss.buffer_used,
1047 err = snd_pcm_oss_sync1(substream, runtime->oss.period_bytes);
1050 } else if (runtime->oss.period_ptr > 0) {
1052 printk("sync: period_ptr\n");
1054 size = runtime->oss.period_bytes - runtime->oss.period_ptr;
1055 snd_pcm_format_set_silence(format,
1056 runtime->oss.buffer,
1058 err = snd_pcm_oss_sync1(substream, size);
1063 * The ALSA's period might be a bit large than OSS one.
1064 * Fill the remain portion of ALSA period with zeros.
1066 size = runtime->control->appl_ptr % runtime->period_size;
1068 size = runtime->period_size - size;
1069 if (runtime->access == SNDRV_PCM_ACCESS_RW_INTERLEAVED) {
1070 size = (runtime->frame_bits * size) / 8;
1073 size_t size1 = size < runtime->oss.period_bytes ? size : runtime->oss.period_bytes;
1076 size1 /= runtime->sample_bits;
1077 snd_pcm_format_set_silence(runtime->format,
1078 runtime->oss.buffer,
1080 fs = snd_enter_user();
1081 snd_pcm_lib_write(substream, (void __user *)runtime->oss.buffer, size1);
1084 } else if (runtime->access == SNDRV_PCM_ACCESS_RW_NONINTERLEAVED) {
1085 void __user *buffers[runtime->channels];
1086 memset(buffers, 0, runtime->channels * sizeof(void *));
1087 snd_pcm_lib_writev(substream, buffers, size);
1091 * finish sync: drain the buffer
1094 saved_f_flags = substream->ffile->f_flags;
1095 substream->ffile->f_flags &= ~O_NONBLOCK;
1096 err = snd_pcm_kernel_playback_ioctl(substream, SNDRV_PCM_IOCTL_DRAIN, NULL);
1097 substream->ffile->f_flags = saved_f_flags;
1100 runtime->oss.prepare = 1;
1103 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
1104 if (substream != NULL) {
1105 if ((err = snd_pcm_oss_make_ready(substream)) < 0)
1107 runtime = substream->runtime;
1108 err = snd_pcm_kernel_capture_ioctl(substream, SNDRV_PCM_IOCTL_DROP, NULL);
1111 runtime->oss.buffer_used = 0;
1112 runtime->oss.prepare = 1;
1117 static int snd_pcm_oss_set_rate(snd_pcm_oss_file_t *pcm_oss_file, int rate)
1121 for (idx = 1; idx >= 0; --idx) {
1122 snd_pcm_substream_t *substream = pcm_oss_file->streams[idx];
1123 snd_pcm_runtime_t *runtime;
1124 if (substream == NULL)
1126 runtime = substream->runtime;
1129 else if (rate > 192000)
1131 if (runtime->oss.rate != rate) {
1132 runtime->oss.params = 1;
1133 runtime->oss.rate = rate;
1136 return snd_pcm_oss_get_rate(pcm_oss_file);
1139 static int snd_pcm_oss_get_rate(snd_pcm_oss_file_t *pcm_oss_file)
1141 snd_pcm_substream_t *substream;
1144 if ((err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream)) < 0)
1146 return substream->runtime->oss.rate;
1149 static int snd_pcm_oss_set_channels(snd_pcm_oss_file_t *pcm_oss_file, unsigned int channels)
1156 for (idx = 1; idx >= 0; --idx) {
1157 snd_pcm_substream_t *substream = pcm_oss_file->streams[idx];
1158 snd_pcm_runtime_t *runtime;
1159 if (substream == NULL)
1161 runtime = substream->runtime;
1162 if (runtime->oss.channels != channels) {
1163 runtime->oss.params = 1;
1164 runtime->oss.channels = channels;
1167 return snd_pcm_oss_get_channels(pcm_oss_file);
1170 static int snd_pcm_oss_get_channels(snd_pcm_oss_file_t *pcm_oss_file)
1172 snd_pcm_substream_t *substream;
1175 if ((err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream)) < 0)
1177 return substream->runtime->oss.channels;
1180 static int snd_pcm_oss_get_block_size(snd_pcm_oss_file_t *pcm_oss_file)
1182 snd_pcm_substream_t *substream;
1185 if ((err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream)) < 0)
1187 return substream->runtime->oss.period_bytes;
1190 static int snd_pcm_oss_get_formats(snd_pcm_oss_file_t *pcm_oss_file)
1192 snd_pcm_substream_t *substream;
1195 snd_pcm_hw_params_t *params;
1196 unsigned int formats = 0;
1197 snd_mask_t format_mask;
1200 if ((err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream)) < 0)
1202 if (atomic_read(&substream->runtime->mmap_count)) {
1205 snd_pcm_oss_setup_t *setup = substream->oss.setup;
1206 direct = (setup != NULL && setup->direct);
1209 return AFMT_MU_LAW | AFMT_U8 |
1210 AFMT_S16_LE | AFMT_S16_BE |
1211 AFMT_S8 | AFMT_U16_LE |
1213 params = kmalloc(sizeof(*params), GFP_KERNEL);
1216 _snd_pcm_hw_params_any(params);
1217 err = snd_pcm_hw_refine(substream, params);
1218 format_mask = *hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT);
1220 snd_assert(err >= 0, return err);
1221 for (fmt = 0; fmt < 32; ++fmt) {
1222 if (snd_mask_test(&format_mask, fmt)) {
1223 int f = snd_pcm_oss_format_to(fmt);
1231 static int snd_pcm_oss_set_format(snd_pcm_oss_file_t *pcm_oss_file, int format)
1235 if (format != AFMT_QUERY) {
1236 formats = snd_pcm_oss_get_formats(pcm_oss_file);
1237 if (!(formats & format))
1239 for (idx = 1; idx >= 0; --idx) {
1240 snd_pcm_substream_t *substream = pcm_oss_file->streams[idx];
1241 snd_pcm_runtime_t *runtime;
1242 if (substream == NULL)
1244 runtime = substream->runtime;
1245 if (runtime->oss.format != format) {
1246 runtime->oss.params = 1;
1247 runtime->oss.format = format;
1251 return snd_pcm_oss_get_format(pcm_oss_file);
1254 static int snd_pcm_oss_get_format(snd_pcm_oss_file_t *pcm_oss_file)
1256 snd_pcm_substream_t *substream;
1259 if ((err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream)) < 0)
1261 return substream->runtime->oss.format;
1264 static int snd_pcm_oss_set_subdivide1(snd_pcm_substream_t *substream, int subdivide)
1266 snd_pcm_runtime_t *runtime;
1268 if (substream == NULL)
1270 runtime = substream->runtime;
1271 if (subdivide == 0) {
1272 subdivide = runtime->oss.subdivision;
1277 if (runtime->oss.subdivision || runtime->oss.fragshift)
1279 if (subdivide != 1 && subdivide != 2 && subdivide != 4 &&
1280 subdivide != 8 && subdivide != 16)
1282 runtime->oss.subdivision = subdivide;
1283 runtime->oss.params = 1;
1287 static int snd_pcm_oss_set_subdivide(snd_pcm_oss_file_t *pcm_oss_file, int subdivide)
1289 int err = -EINVAL, idx;
1291 for (idx = 1; idx >= 0; --idx) {
1292 snd_pcm_substream_t *substream = pcm_oss_file->streams[idx];
1293 if (substream == NULL)
1295 if ((err = snd_pcm_oss_set_subdivide1(substream, subdivide)) < 0)
1301 static int snd_pcm_oss_set_fragment1(snd_pcm_substream_t *substream, unsigned int val)
1303 snd_pcm_runtime_t *runtime;
1305 if (substream == NULL)
1307 runtime = substream->runtime;
1308 if (runtime->oss.subdivision || runtime->oss.fragshift)
1310 runtime->oss.fragshift = val & 0xffff;
1311 runtime->oss.maxfrags = (val >> 16) & 0xffff;
1312 if (runtime->oss.fragshift < 4) /* < 16 */
1313 runtime->oss.fragshift = 4;
1314 if (runtime->oss.maxfrags < 2)
1315 runtime->oss.maxfrags = 2;
1316 runtime->oss.params = 1;
1320 static int snd_pcm_oss_set_fragment(snd_pcm_oss_file_t *pcm_oss_file, unsigned int val)
1322 int err = -EINVAL, idx;
1324 for (idx = 1; idx >= 0; --idx) {
1325 snd_pcm_substream_t *substream = pcm_oss_file->streams[idx];
1326 if (substream == NULL)
1328 if ((err = snd_pcm_oss_set_fragment1(substream, val)) < 0)
1334 static int snd_pcm_oss_nonblock(struct file * file)
1336 file->f_flags |= O_NONBLOCK;
1340 static int snd_pcm_oss_get_caps1(snd_pcm_substream_t *substream, int res)
1343 if (substream == NULL) {
1344 res &= ~DSP_CAP_DUPLEX;
1347 #ifdef DSP_CAP_MULTI
1348 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
1349 if (substream->pstr->substream_count > 1)
1350 res |= DSP_CAP_MULTI;
1352 /* DSP_CAP_REALTIME is set all times: */
1353 /* all ALSA drivers can return actual pointer in ring buffer */
1354 #if defined(DSP_CAP_REALTIME) && 0
1356 snd_pcm_runtime_t *runtime = substream->runtime;
1357 if (runtime->info & (SNDRV_PCM_INFO_BLOCK_TRANSFER|SNDRV_PCM_INFO_BATCH))
1358 res &= ~DSP_CAP_REALTIME;
1364 static int snd_pcm_oss_get_caps(snd_pcm_oss_file_t *pcm_oss_file)
1368 result = DSP_CAP_TRIGGER | DSP_CAP_MMAP | DSP_CAP_DUPLEX | DSP_CAP_REALTIME;
1369 for (idx = 0; idx < 2; idx++) {
1370 snd_pcm_substream_t *substream = pcm_oss_file->streams[idx];
1371 result = snd_pcm_oss_get_caps1(substream, result);
1373 result |= 0x0001; /* revision - same as SB AWE 64 */
1377 static void snd_pcm_oss_simulate_fill(snd_pcm_substream_t *substream, snd_pcm_uframes_t hw_ptr)
1379 snd_pcm_runtime_t *runtime = substream->runtime;
1380 snd_pcm_uframes_t appl_ptr;
1381 appl_ptr = hw_ptr + runtime->buffer_size;
1382 appl_ptr %= runtime->boundary;
1383 runtime->control->appl_ptr = appl_ptr;
1386 static int snd_pcm_oss_set_trigger(snd_pcm_oss_file_t *pcm_oss_file, int trigger)
1388 snd_pcm_runtime_t *runtime;
1389 snd_pcm_substream_t *psubstream = NULL, *csubstream = NULL;
1393 printk("pcm_oss: trigger = 0x%x\n", trigger);
1396 psubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
1397 csubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
1400 if ((err = snd_pcm_oss_make_ready(psubstream)) < 0)
1404 if ((err = snd_pcm_oss_make_ready(csubstream)) < 0)
1408 runtime = psubstream->runtime;
1409 if (trigger & PCM_ENABLE_OUTPUT) {
1410 if (runtime->oss.trigger)
1412 if (atomic_read(&psubstream->runtime->mmap_count))
1413 snd_pcm_oss_simulate_fill(psubstream, runtime->hw_ptr_interrupt);
1414 runtime->oss.trigger = 1;
1415 runtime->start_threshold = 1;
1416 cmd = SNDRV_PCM_IOCTL_START;
1418 if (!runtime->oss.trigger)
1420 runtime->oss.trigger = 0;
1421 runtime->start_threshold = runtime->boundary;
1422 cmd = SNDRV_PCM_IOCTL_DROP;
1423 runtime->oss.prepare = 1;
1425 err = snd_pcm_kernel_playback_ioctl(psubstream, cmd, NULL);
1431 runtime = csubstream->runtime;
1432 if (trigger & PCM_ENABLE_INPUT) {
1433 if (runtime->oss.trigger)
1435 runtime->oss.trigger = 1;
1436 runtime->start_threshold = 1;
1437 cmd = SNDRV_PCM_IOCTL_START;
1439 if (!runtime->oss.trigger)
1441 runtime->oss.trigger = 0;
1442 runtime->start_threshold = runtime->boundary;
1443 cmd = SNDRV_PCM_IOCTL_DROP;
1444 runtime->oss.prepare = 1;
1446 err = snd_pcm_kernel_capture_ioctl(csubstream, cmd, NULL);
1454 static int snd_pcm_oss_get_trigger(snd_pcm_oss_file_t *pcm_oss_file)
1456 snd_pcm_substream_t *psubstream = NULL, *csubstream = NULL;
1459 psubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
1460 csubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
1461 if (psubstream && psubstream->runtime && psubstream->runtime->oss.trigger)
1462 result |= PCM_ENABLE_OUTPUT;
1463 if (csubstream && csubstream->runtime && csubstream->runtime->oss.trigger)
1464 result |= PCM_ENABLE_INPUT;
1468 static int snd_pcm_oss_get_odelay(snd_pcm_oss_file_t *pcm_oss_file)
1470 snd_pcm_substream_t *substream;
1471 snd_pcm_runtime_t *runtime;
1472 snd_pcm_sframes_t delay;
1475 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
1476 if (substream == NULL)
1478 if ((err = snd_pcm_oss_make_ready(substream)) < 0)
1480 runtime = substream->runtime;
1481 if (runtime->oss.params || runtime->oss.prepare)
1483 err = snd_pcm_kernel_playback_ioctl(substream, SNDRV_PCM_IOCTL_DELAY, &delay);
1485 delay = 0; /* hack for broken OSS applications */
1488 return snd_pcm_oss_bytes(substream, delay);
1491 static int snd_pcm_oss_get_ptr(snd_pcm_oss_file_t *pcm_oss_file, int stream, struct count_info __user * _info)
1493 snd_pcm_substream_t *substream;
1494 snd_pcm_runtime_t *runtime;
1495 snd_pcm_sframes_t delay;
1497 struct count_info info;
1502 substream = pcm_oss_file->streams[stream];
1503 if (substream == NULL)
1505 if ((err = snd_pcm_oss_make_ready(substream)) < 0)
1507 runtime = substream->runtime;
1508 if (runtime->oss.params || runtime->oss.prepare) {
1509 memset(&info, 0, sizeof(info));
1510 if (copy_to_user(_info, &info, sizeof(info)))
1514 if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
1515 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DELAY, &delay);
1516 if (err == -EPIPE || err == -ESTRPIPE || (! err && delay < 0)) {
1521 fixup = runtime->oss.buffer_used;
1524 err = snd_pcm_oss_capture_position_fixup(substream, &delay);
1525 fixup = -runtime->oss.buffer_used;
1529 info.ptr = snd_pcm_oss_bytes(substream, runtime->status->hw_ptr % runtime->buffer_size);
1530 if (atomic_read(&runtime->mmap_count)) {
1531 snd_pcm_sframes_t n;
1532 n = (delay = runtime->hw_ptr_interrupt) - runtime->oss.prev_hw_ptr_interrupt;
1534 n += runtime->boundary;
1535 info.blocks = n / runtime->period_size;
1536 runtime->oss.prev_hw_ptr_interrupt = delay;
1537 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
1538 snd_pcm_oss_simulate_fill(substream, delay);
1539 info.bytes = snd_pcm_oss_bytes(substream, runtime->status->hw_ptr) & INT_MAX;
1541 delay = snd_pcm_oss_bytes(substream, delay);
1542 if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
1543 info.blocks = (runtime->oss.buffer_bytes - delay - fixup) / runtime->oss.period_bytes;
1544 info.bytes = (runtime->oss.bytes - delay) & INT_MAX;
1547 info.blocks = delay / runtime->oss.period_bytes;
1548 info.bytes = (runtime->oss.bytes + delay) & INT_MAX;
1551 if (copy_to_user(_info, &info, sizeof(info)))
1556 static int snd_pcm_oss_get_space(snd_pcm_oss_file_t *pcm_oss_file, int stream, struct audio_buf_info __user *_info)
1558 snd_pcm_substream_t *substream;
1559 snd_pcm_runtime_t *runtime;
1560 snd_pcm_sframes_t avail;
1562 struct audio_buf_info info;
1567 substream = pcm_oss_file->streams[stream];
1568 if (substream == NULL)
1570 runtime = substream->runtime;
1572 if (runtime->oss.params &&
1573 (err = snd_pcm_oss_change_params(substream)) < 0)
1576 info.fragsize = runtime->oss.period_bytes;
1577 info.fragstotal = runtime->periods;
1578 if (runtime->oss.prepare) {
1579 if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
1580 info.bytes = runtime->oss.period_bytes * runtime->oss.periods;
1581 info.fragments = runtime->oss.periods;
1587 if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
1588 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DELAY, &avail);
1589 if (err == -EPIPE || err == -ESTRPIPE || (! err && avail < 0)) {
1590 avail = runtime->buffer_size;
1594 avail = runtime->buffer_size - avail;
1595 fixup = -runtime->oss.buffer_used;
1598 err = snd_pcm_oss_capture_position_fixup(substream, &avail);
1599 fixup = runtime->oss.buffer_used;
1603 info.bytes = snd_pcm_oss_bytes(substream, avail) + fixup;
1604 info.fragments = info.bytes / runtime->oss.period_bytes;
1608 printk("pcm_oss: space: bytes = %i, fragments = %i, fragstotal = %i, fragsize = %i\n", info.bytes, info.fragments, info.fragstotal, info.fragsize);
1610 if (copy_to_user(_info, &info, sizeof(info)))
1615 static int snd_pcm_oss_get_mapbuf(snd_pcm_oss_file_t *pcm_oss_file, int stream, struct buffmem_desc __user * _info)
1617 // it won't be probably implemented
1618 // snd_printd("TODO: snd_pcm_oss_get_mapbuf\n");
1622 static snd_pcm_oss_setup_t *snd_pcm_oss_look_for_setup(snd_pcm_t *pcm, int stream, const char *task_name)
1624 const char *ptr, *ptrl;
1625 snd_pcm_oss_setup_t *setup;
1627 down(&pcm->streams[stream].oss.setup_mutex);
1628 for (setup = pcm->streams[stream].oss.setup_list; setup; setup = setup->next) {
1629 if (!strcmp(setup->task_name, task_name)) {
1630 up(&pcm->streams[stream].oss.setup_mutex);
1634 ptr = ptrl = task_name;
1640 if (ptrl == task_name) {
1644 for (setup = pcm->streams[stream].oss.setup_list; setup; setup = setup->next) {
1645 if (!strcmp(setup->task_name, ptrl)) {
1646 up(&pcm->streams[stream].oss.setup_mutex);
1651 up(&pcm->streams[stream].oss.setup_mutex);
1655 static void snd_pcm_oss_init_substream(snd_pcm_substream_t *substream,
1656 snd_pcm_oss_setup_t *setup,
1659 snd_pcm_runtime_t *runtime;
1661 substream->oss.oss = 1;
1662 substream->oss.setup = setup;
1663 runtime = substream->runtime;
1664 runtime->oss.params = 1;
1665 runtime->oss.trigger = 1;
1666 runtime->oss.rate = 8000;
1667 switch (SNDRV_MINOR_OSS_DEVICE(minor)) {
1668 case SNDRV_MINOR_OSS_PCM_8:
1669 runtime->oss.format = AFMT_U8;
1671 case SNDRV_MINOR_OSS_PCM_16:
1672 runtime->oss.format = AFMT_S16_LE;
1675 runtime->oss.format = AFMT_MU_LAW;
1677 runtime->oss.channels = 1;
1678 runtime->oss.fragshift = 0;
1679 runtime->oss.maxfrags = 0;
1680 runtime->oss.subdivision = 0;
1683 static void snd_pcm_oss_release_substream(snd_pcm_substream_t *substream)
1685 snd_pcm_runtime_t *runtime;
1686 runtime = substream->runtime;
1687 vfree(runtime->oss.buffer);
1688 snd_pcm_oss_plugin_clear(substream);
1689 substream->oss.file = NULL;
1690 substream->oss.oss = 0;
1693 static int snd_pcm_oss_release_file(snd_pcm_oss_file_t *pcm_oss_file)
1696 snd_assert(pcm_oss_file != NULL, return -ENXIO);
1697 for (cidx = 0; cidx < 2; ++cidx) {
1698 snd_pcm_substream_t *substream = pcm_oss_file->streams[cidx];
1699 snd_pcm_runtime_t *runtime;
1700 if (substream == NULL)
1702 runtime = substream->runtime;
1704 snd_pcm_stream_lock_irq(substream);
1705 if (snd_pcm_running(substream))
1706 snd_pcm_stop(substream, SNDRV_PCM_STATE_SETUP);
1707 snd_pcm_stream_unlock_irq(substream);
1708 if (substream->ffile != NULL) {
1709 if (substream->ops->hw_free != NULL)
1710 substream->ops->hw_free(substream);
1711 substream->ops->close(substream);
1712 substream->ffile = NULL;
1714 snd_pcm_oss_release_substream(substream);
1715 snd_pcm_release_substream(substream);
1717 kfree(pcm_oss_file);
1721 static int snd_pcm_oss_open_file(struct file *file,
1723 snd_pcm_oss_file_t **rpcm_oss_file,
1725 snd_pcm_oss_setup_t *psetup,
1726 snd_pcm_oss_setup_t *csetup)
1729 snd_pcm_oss_file_t *pcm_oss_file;
1730 snd_pcm_substream_t *psubstream = NULL, *csubstream = NULL;
1731 unsigned int f_mode = file->f_mode;
1733 snd_assert(rpcm_oss_file != NULL, return -EINVAL);
1734 *rpcm_oss_file = NULL;
1736 pcm_oss_file = kcalloc(1, sizeof(*pcm_oss_file), GFP_KERNEL);
1737 if (pcm_oss_file == NULL)
1740 if ((f_mode & (FMODE_WRITE|FMODE_READ)) == (FMODE_WRITE|FMODE_READ) &&
1741 (pcm->info_flags & SNDRV_PCM_INFO_HALF_DUPLEX))
1742 f_mode = FMODE_WRITE;
1743 if ((f_mode & FMODE_WRITE) && !(psetup && psetup->disable)) {
1744 if ((err = snd_pcm_open_substream(pcm, SNDRV_PCM_STREAM_PLAYBACK,
1745 &psubstream)) < 0) {
1746 snd_pcm_oss_release_file(pcm_oss_file);
1749 pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK] = psubstream;
1751 if ((f_mode & FMODE_READ) && !(csetup && csetup->disable)) {
1752 if ((err = snd_pcm_open_substream(pcm, SNDRV_PCM_STREAM_CAPTURE,
1753 &csubstream)) < 0) {
1754 if (!(f_mode & FMODE_WRITE) || err != -ENODEV) {
1755 snd_pcm_oss_release_file(pcm_oss_file);
1761 pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE] = csubstream;
1764 if (psubstream == NULL && csubstream == NULL) {
1765 snd_pcm_oss_release_file(pcm_oss_file);
1768 if (psubstream != NULL) {
1769 psubstream->oss.file = pcm_oss_file;
1770 err = snd_pcm_hw_constraints_init(psubstream);
1772 snd_printd("snd_pcm_hw_constraint_init failed\n");
1773 snd_pcm_oss_release_file(pcm_oss_file);
1776 if ((err = psubstream->ops->open(psubstream)) < 0) {
1777 snd_pcm_oss_release_file(pcm_oss_file);
1780 psubstream->ffile = file;
1781 err = snd_pcm_hw_constraints_complete(psubstream);
1783 snd_printd("snd_pcm_hw_constraint_complete failed\n");
1784 snd_pcm_oss_release_file(pcm_oss_file);
1787 snd_pcm_oss_init_substream(psubstream, psetup, minor);
1789 if (csubstream != NULL) {
1790 csubstream->oss.file = pcm_oss_file;
1791 err = snd_pcm_hw_constraints_init(csubstream);
1793 snd_printd("snd_pcm_hw_constraint_init failed\n");
1794 snd_pcm_oss_release_file(pcm_oss_file);
1797 if ((err = csubstream->ops->open(csubstream)) < 0) {
1798 snd_pcm_oss_release_file(pcm_oss_file);
1801 csubstream->ffile = file;
1802 err = snd_pcm_hw_constraints_complete(csubstream);
1804 snd_printd("snd_pcm_hw_constraint_complete failed\n");
1805 snd_pcm_oss_release_file(pcm_oss_file);
1808 snd_pcm_oss_init_substream(csubstream, csetup, minor);
1811 file->private_data = pcm_oss_file;
1812 *rpcm_oss_file = pcm_oss_file;
1817 static int snd_pcm_oss_open(struct inode *inode, struct file *file)
1819 int minor = iminor(inode);
1820 int cardnum = SNDRV_MINOR_OSS_CARD(minor);
1825 snd_pcm_oss_file_t *pcm_oss_file;
1826 snd_pcm_oss_setup_t *psetup = NULL, *csetup = NULL;
1830 snd_assert(cardnum >= 0 && cardnum < SNDRV_CARDS, return -ENXIO);
1831 device = SNDRV_MINOR_OSS_DEVICE(minor) == SNDRV_MINOR_OSS_PCM1 ?
1832 adsp_map[cardnum] : dsp_map[cardnum];
1834 pcm = snd_pcm_devices[(cardnum * SNDRV_PCM_DEVICES) + device];
1839 err = snd_card_file_add(pcm->card, file);
1842 if (!try_module_get(pcm->card->module)) {
1846 if (snd_task_name(current, task_name, sizeof(task_name)) < 0) {
1850 if (file->f_mode & FMODE_WRITE)
1851 psetup = snd_pcm_oss_look_for_setup(pcm, SNDRV_PCM_STREAM_PLAYBACK, task_name);
1852 if (file->f_mode & FMODE_READ)
1853 csetup = snd_pcm_oss_look_for_setup(pcm, SNDRV_PCM_STREAM_CAPTURE, task_name);
1855 nonblock = !!(file->f_flags & O_NONBLOCK);
1856 if (psetup && !psetup->disable) {
1857 if (psetup->nonblock)
1859 else if (psetup->block)
1861 } else if (csetup && !csetup->disable) {
1862 if (csetup->nonblock)
1864 else if (csetup->block)
1868 nonblock = nonblock_open;
1870 init_waitqueue_entry(&wait, current);
1871 add_wait_queue(&pcm->open_wait, &wait);
1872 down(&pcm->open_mutex);
1874 err = snd_pcm_oss_open_file(file, pcm, &pcm_oss_file,
1875 minor, psetup, csetup);
1878 if (err == -EAGAIN) {
1885 set_current_state(TASK_INTERRUPTIBLE);
1886 up(&pcm->open_mutex);
1888 down(&pcm->open_mutex);
1889 if (signal_pending(current)) {
1894 remove_wait_queue(&pcm->open_wait, &wait);
1895 up(&pcm->open_mutex);
1901 module_put(pcm->card->module);
1903 snd_card_file_remove(pcm->card, file);
1908 static int snd_pcm_oss_release(struct inode *inode, struct file *file)
1911 snd_pcm_substream_t *substream;
1912 snd_pcm_oss_file_t *pcm_oss_file;
1914 pcm_oss_file = file->private_data;
1915 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
1916 if (substream == NULL)
1917 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
1918 snd_assert(substream != NULL, return -ENXIO);
1919 pcm = substream->pcm;
1920 snd_pcm_oss_sync(pcm_oss_file);
1921 down(&pcm->open_mutex);
1922 snd_pcm_oss_release_file(pcm_oss_file);
1923 up(&pcm->open_mutex);
1924 wake_up(&pcm->open_wait);
1925 module_put(pcm->card->module);
1926 snd_card_file_remove(pcm->card, file);
1930 static long snd_pcm_oss_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
1932 snd_pcm_oss_file_t *pcm_oss_file;
1933 int __user *p = (int __user *)arg;
1936 pcm_oss_file = file->private_data;
1937 if (cmd == OSS_GETVERSION)
1938 return put_user(SNDRV_OSS_VERSION, p);
1939 if (cmd == OSS_ALSAEMULVER)
1940 return put_user(1, p);
1941 #if defined(CONFIG_SND_MIXER_OSS) || (defined(MODULE) && defined(CONFIG_SND_MIXER_OSS_MODULE))
1942 if (((cmd >> 8) & 0xff) == 'M') { /* mixer ioctl - for OSS compatibility */
1943 snd_pcm_substream_t *substream;
1945 for (idx = 0; idx < 2; ++idx) {
1946 substream = pcm_oss_file->streams[idx];
1947 if (substream != NULL)
1950 snd_assert(substream != NULL, return -ENXIO);
1951 return snd_mixer_oss_ioctl_card(substream->pcm->card, cmd, arg);
1954 if (((cmd >> 8) & 0xff) != 'P')
1957 printk("pcm_oss: ioctl = 0x%x\n", cmd);
1960 case SNDCTL_DSP_RESET:
1961 return snd_pcm_oss_reset(pcm_oss_file);
1962 case SNDCTL_DSP_SYNC:
1963 return snd_pcm_oss_sync(pcm_oss_file);
1964 case SNDCTL_DSP_SPEED:
1965 if (get_user(res, p))
1967 if ((res = snd_pcm_oss_set_rate(pcm_oss_file, res))<0)
1969 return put_user(res, p);
1970 case SOUND_PCM_READ_RATE:
1971 res = snd_pcm_oss_get_rate(pcm_oss_file);
1974 return put_user(res, p);
1975 case SNDCTL_DSP_STEREO:
1976 if (get_user(res, p))
1978 res = res > 0 ? 2 : 1;
1979 if ((res = snd_pcm_oss_set_channels(pcm_oss_file, res)) < 0)
1981 return put_user(--res, p);
1982 case SNDCTL_DSP_GETBLKSIZE:
1983 res = snd_pcm_oss_get_block_size(pcm_oss_file);
1986 return put_user(res, p);
1987 case SNDCTL_DSP_SETFMT:
1988 if (get_user(res, p))
1990 res = snd_pcm_oss_set_format(pcm_oss_file, res);
1993 return put_user(res, p);
1994 case SOUND_PCM_READ_BITS:
1995 res = snd_pcm_oss_get_format(pcm_oss_file);
1998 return put_user(res, p);
1999 case SNDCTL_DSP_CHANNELS:
2000 if (get_user(res, p))
2002 res = snd_pcm_oss_set_channels(pcm_oss_file, res);
2005 return put_user(res, p);
2006 case SOUND_PCM_READ_CHANNELS:
2007 res = snd_pcm_oss_get_channels(pcm_oss_file);
2010 return put_user(res, p);
2011 case SOUND_PCM_WRITE_FILTER:
2012 case SOUND_PCM_READ_FILTER:
2014 case SNDCTL_DSP_POST:
2015 return snd_pcm_oss_post(pcm_oss_file);
2016 case SNDCTL_DSP_SUBDIVIDE:
2017 if (get_user(res, p))
2019 res = snd_pcm_oss_set_subdivide(pcm_oss_file, res);
2022 return put_user(res, p);
2023 case SNDCTL_DSP_SETFRAGMENT:
2024 if (get_user(res, p))
2026 return snd_pcm_oss_set_fragment(pcm_oss_file, res);
2027 case SNDCTL_DSP_GETFMTS:
2028 res = snd_pcm_oss_get_formats(pcm_oss_file);
2031 return put_user(res, p);
2032 case SNDCTL_DSP_GETOSPACE:
2033 case SNDCTL_DSP_GETISPACE:
2034 return snd_pcm_oss_get_space(pcm_oss_file,
2035 cmd == SNDCTL_DSP_GETISPACE ?
2036 SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK,
2037 (struct audio_buf_info __user *) arg);
2038 case SNDCTL_DSP_NONBLOCK:
2039 return snd_pcm_oss_nonblock(file);
2040 case SNDCTL_DSP_GETCAPS:
2041 res = snd_pcm_oss_get_caps(pcm_oss_file);
2044 return put_user(res, p);
2045 case SNDCTL_DSP_GETTRIGGER:
2046 res = snd_pcm_oss_get_trigger(pcm_oss_file);
2049 return put_user(res, p);
2050 case SNDCTL_DSP_SETTRIGGER:
2051 if (get_user(res, p))
2053 return snd_pcm_oss_set_trigger(pcm_oss_file, res);
2054 case SNDCTL_DSP_GETIPTR:
2055 case SNDCTL_DSP_GETOPTR:
2056 return snd_pcm_oss_get_ptr(pcm_oss_file,
2057 cmd == SNDCTL_DSP_GETIPTR ?
2058 SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK,
2059 (struct count_info __user *) arg);
2060 case SNDCTL_DSP_MAPINBUF:
2061 case SNDCTL_DSP_MAPOUTBUF:
2062 return snd_pcm_oss_get_mapbuf(pcm_oss_file,
2063 cmd == SNDCTL_DSP_MAPINBUF ?
2064 SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK,
2065 (struct buffmem_desc __user *) arg);
2066 case SNDCTL_DSP_SETSYNCRO:
2067 /* stop DMA now.. */
2069 case SNDCTL_DSP_SETDUPLEX:
2070 if (snd_pcm_oss_get_caps(pcm_oss_file) & DSP_CAP_DUPLEX)
2073 case SNDCTL_DSP_GETODELAY:
2074 res = snd_pcm_oss_get_odelay(pcm_oss_file);
2076 /* it's for sure, some broken apps don't check for error codes */
2080 return put_user(res, p);
2081 case SNDCTL_DSP_PROFILE:
2082 return 0; /* silently ignore */
2084 snd_printd("pcm_oss: unknown command = 0x%x\n", cmd);
2089 #ifdef CONFIG_COMPAT
2090 /* all compatible */
2091 #define snd_pcm_oss_ioctl_compat snd_pcm_oss_ioctl
2093 #define snd_pcm_oss_ioctl_compat NULL
2096 static ssize_t snd_pcm_oss_read(struct file *file, char __user *buf, size_t count, loff_t *offset)
2098 snd_pcm_oss_file_t *pcm_oss_file;
2099 snd_pcm_substream_t *substream;
2101 pcm_oss_file = file->private_data;
2102 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
2103 if (substream == NULL)
2106 return snd_pcm_oss_read1(substream, buf, count);
2109 ssize_t res = snd_pcm_oss_read1(substream, buf, count);
2110 printk("pcm_oss: read %li bytes (returned %li bytes)\n", (long)count, (long)res);
2116 static ssize_t snd_pcm_oss_write(struct file *file, const char __user *buf, size_t count, loff_t *offset)
2118 snd_pcm_oss_file_t *pcm_oss_file;
2119 snd_pcm_substream_t *substream;
2122 pcm_oss_file = file->private_data;
2123 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
2124 if (substream == NULL)
2126 up(&file->f_dentry->d_inode->i_sem);
2127 result = snd_pcm_oss_write1(substream, buf, count);
2128 down(&file->f_dentry->d_inode->i_sem);
2130 printk("pcm_oss: write %li bytes (wrote %li bytes)\n", (long)count, (long)result);
2135 static int snd_pcm_oss_playback_ready(snd_pcm_substream_t *substream)
2137 snd_pcm_runtime_t *runtime = substream->runtime;
2138 if (atomic_read(&runtime->mmap_count))
2139 return runtime->oss.prev_hw_ptr_interrupt != runtime->hw_ptr_interrupt;
2141 return snd_pcm_playback_avail(runtime) >= runtime->oss.period_frames;
2144 static int snd_pcm_oss_capture_ready(snd_pcm_substream_t *substream)
2146 snd_pcm_runtime_t *runtime = substream->runtime;
2147 if (atomic_read(&runtime->mmap_count))
2148 return runtime->oss.prev_hw_ptr_interrupt != runtime->hw_ptr_interrupt;
2150 return snd_pcm_capture_avail(runtime) >= runtime->oss.period_frames;
2153 static unsigned int snd_pcm_oss_poll(struct file *file, poll_table * wait)
2155 snd_pcm_oss_file_t *pcm_oss_file;
2157 snd_pcm_substream_t *psubstream = NULL, *csubstream = NULL;
2159 pcm_oss_file = file->private_data;
2161 psubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
2162 csubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
2165 if (psubstream != NULL) {
2166 snd_pcm_runtime_t *runtime = psubstream->runtime;
2167 poll_wait(file, &runtime->sleep, wait);
2168 snd_pcm_stream_lock_irq(psubstream);
2169 if (runtime->status->state != SNDRV_PCM_STATE_DRAINING &&
2170 (runtime->status->state != SNDRV_PCM_STATE_RUNNING ||
2171 snd_pcm_oss_playback_ready(psubstream)))
2172 mask |= POLLOUT | POLLWRNORM;
2173 snd_pcm_stream_unlock_irq(psubstream);
2175 if (csubstream != NULL) {
2176 snd_pcm_runtime_t *runtime = csubstream->runtime;
2177 enum sndrv_pcm_state ostate;
2178 poll_wait(file, &runtime->sleep, wait);
2179 snd_pcm_stream_lock_irq(csubstream);
2180 if ((ostate = runtime->status->state) != SNDRV_PCM_STATE_RUNNING ||
2181 snd_pcm_oss_capture_ready(csubstream))
2182 mask |= POLLIN | POLLRDNORM;
2183 snd_pcm_stream_unlock_irq(csubstream);
2184 if (ostate != SNDRV_PCM_STATE_RUNNING && runtime->oss.trigger) {
2185 snd_pcm_oss_file_t ofile;
2186 memset(&ofile, 0, sizeof(ofile));
2187 ofile.streams[SNDRV_PCM_STREAM_CAPTURE] = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
2188 runtime->oss.trigger = 0;
2189 snd_pcm_oss_set_trigger(&ofile, PCM_ENABLE_INPUT);
2196 static int snd_pcm_oss_mmap(struct file *file, struct vm_area_struct *area)
2198 snd_pcm_oss_file_t *pcm_oss_file;
2199 snd_pcm_substream_t *substream = NULL;
2200 snd_pcm_runtime_t *runtime;
2204 printk("pcm_oss: mmap begin\n");
2206 pcm_oss_file = file->private_data;
2207 switch ((area->vm_flags & (VM_READ | VM_WRITE))) {
2208 case VM_READ | VM_WRITE:
2209 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
2214 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
2217 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
2222 /* set VM_READ access as well to fix memset() routines that do
2223 reads before writes (to improve performance) */
2224 area->vm_flags |= VM_READ;
2225 if (substream == NULL)
2227 runtime = substream->runtime;
2228 if (!(runtime->info & SNDRV_PCM_INFO_MMAP_VALID))
2230 if (runtime->info & SNDRV_PCM_INFO_INTERLEAVED)
2231 runtime->access = SNDRV_PCM_ACCESS_MMAP_INTERLEAVED;
2235 if (runtime->oss.params) {
2236 if ((err = snd_pcm_oss_change_params(substream)) < 0)
2239 if (runtime->oss.plugin_first != NULL)
2242 if (area->vm_pgoff != 0)
2245 err = snd_pcm_mmap_data(substream, file, area);
2248 runtime->oss.mmap_bytes = area->vm_end - area->vm_start;
2249 runtime->silence_threshold = 0;
2250 runtime->silence_size = 0;
2252 printk("pcm_oss: mmap ok, bytes = 0x%x\n", runtime->oss.mmap_bytes);
2254 /* In mmap mode we never stop */
2255 runtime->stop_threshold = runtime->boundary;
2264 static void snd_pcm_oss_proc_read(snd_info_entry_t *entry,
2265 snd_info_buffer_t * buffer)
2267 snd_pcm_str_t *pstr = (snd_pcm_str_t *)entry->private_data;
2268 snd_pcm_oss_setup_t *setup = pstr->oss.setup_list;
2269 down(&pstr->oss.setup_mutex);
2271 snd_iprintf(buffer, "%s %u %u%s%s%s%s%s%s\n",
2275 setup->disable ? " disable" : "",
2276 setup->direct ? " direct" : "",
2277 setup->block ? " block" : "",
2278 setup->nonblock ? " non-block" : "",
2279 setup->partialfrag ? " partial-frag" : "",
2280 setup->nosilence ? " no-silence" : "");
2281 setup = setup->next;
2283 up(&pstr->oss.setup_mutex);
2286 static void snd_pcm_oss_proc_free_setup_list(snd_pcm_str_t * pstr)
2289 snd_pcm_substream_t *substream;
2290 snd_pcm_oss_setup_t *setup, *setupn;
2292 for (idx = 0, substream = pstr->substream;
2293 idx < pstr->substream_count; idx++, substream = substream->next)
2294 substream->oss.setup = NULL;
2295 for (setup = pstr->oss.setup_list, pstr->oss.setup_list = NULL;
2296 setup; setup = setupn) {
2297 setupn = setup->next;
2298 kfree(setup->task_name);
2301 pstr->oss.setup_list = NULL;
2304 static void snd_pcm_oss_proc_write(snd_info_entry_t *entry,
2305 snd_info_buffer_t * buffer)
2307 snd_pcm_str_t *pstr = (snd_pcm_str_t *)entry->private_data;
2308 char line[128], str[32], task_name[32], *ptr;
2310 snd_pcm_oss_setup_t *setup, *setup1, template;
2312 while (!snd_info_get_line(buffer, line, sizeof(line))) {
2313 down(&pstr->oss.setup_mutex);
2314 memset(&template, 0, sizeof(template));
2315 ptr = snd_info_get_str(task_name, line, sizeof(task_name));
2316 if (!strcmp(task_name, "clear") || !strcmp(task_name, "erase")) {
2317 snd_pcm_oss_proc_free_setup_list(pstr);
2318 up(&pstr->oss.setup_mutex);
2321 for (setup = pstr->oss.setup_list; setup; setup = setup->next) {
2322 if (!strcmp(setup->task_name, task_name)) {
2327 ptr = snd_info_get_str(str, ptr, sizeof(str));
2328 template.periods = simple_strtoul(str, NULL, 10);
2329 ptr = snd_info_get_str(str, ptr, sizeof(str));
2330 template.period_size = simple_strtoul(str, NULL, 10);
2331 for (idx1 = 31; idx1 >= 0; idx1--)
2332 if (template.period_size & (1 << idx1))
2334 for (idx1--; idx1 >= 0; idx1--)
2335 template.period_size &= ~(1 << idx1);
2337 ptr = snd_info_get_str(str, ptr, sizeof(str));
2338 if (!strcmp(str, "disable")) {
2339 template.disable = 1;
2340 } else if (!strcmp(str, "direct")) {
2341 template.direct = 1;
2342 } else if (!strcmp(str, "block")) {
2344 } else if (!strcmp(str, "non-block")) {
2345 template.nonblock = 1;
2346 } else if (!strcmp(str, "partial-frag")) {
2347 template.partialfrag = 1;
2348 } else if (!strcmp(str, "no-silence")) {
2349 template.nosilence = 1;
2352 if (setup == NULL) {
2353 setup = (snd_pcm_oss_setup_t *) kmalloc(sizeof(snd_pcm_oss_setup_t), GFP_KERNEL);
2355 if (pstr->oss.setup_list == NULL) {
2356 pstr->oss.setup_list = setup;
2358 for (setup1 = pstr->oss.setup_list; setup1->next; setup1 = setup1->next);
2359 setup1->next = setup;
2361 template.task_name = kstrdup(task_name, GFP_KERNEL);
2363 buffer->error = -ENOMEM;
2368 up(&pstr->oss.setup_mutex);
2372 static void snd_pcm_oss_proc_init(snd_pcm_t *pcm)
2375 for (stream = 0; stream < 2; ++stream) {
2376 snd_info_entry_t *entry;
2377 snd_pcm_str_t *pstr = &pcm->streams[stream];
2378 if (pstr->substream_count == 0)
2380 if ((entry = snd_info_create_card_entry(pcm->card, "oss", pstr->proc_root)) != NULL) {
2381 entry->content = SNDRV_INFO_CONTENT_TEXT;
2382 entry->mode = S_IFREG | S_IRUGO | S_IWUSR;
2383 entry->c.text.read_size = 8192;
2384 entry->c.text.read = snd_pcm_oss_proc_read;
2385 entry->c.text.write_size = 8192;
2386 entry->c.text.write = snd_pcm_oss_proc_write;
2387 entry->private_data = pstr;
2388 if (snd_info_register(entry) < 0) {
2389 snd_info_free_entry(entry);
2393 pstr->oss.proc_entry = entry;
2397 static void snd_pcm_oss_proc_done(snd_pcm_t *pcm)
2400 for (stream = 0; stream < 2; ++stream) {
2401 snd_pcm_str_t *pstr = &pcm->streams[stream];
2402 if (pstr->oss.proc_entry) {
2403 snd_info_unregister(pstr->oss.proc_entry);
2404 pstr->oss.proc_entry = NULL;
2405 snd_pcm_oss_proc_free_setup_list(pstr);
2414 static struct file_operations snd_pcm_oss_f_reg =
2416 .owner = THIS_MODULE,
2417 .read = snd_pcm_oss_read,
2418 .write = snd_pcm_oss_write,
2419 .open = snd_pcm_oss_open,
2420 .release = snd_pcm_oss_release,
2421 .poll = snd_pcm_oss_poll,
2422 .unlocked_ioctl = snd_pcm_oss_ioctl,
2423 .compat_ioctl = snd_pcm_oss_ioctl_compat,
2424 .mmap = snd_pcm_oss_mmap,
2427 static snd_minor_t snd_pcm_oss_reg =
2429 .comment = "digital audio",
2430 .f_ops = &snd_pcm_oss_f_reg,
2433 static void register_oss_dsp(snd_pcm_t *pcm, int index)
2436 sprintf(name, "dsp%i%i", pcm->card->number, pcm->device);
2437 if (snd_register_oss_device(SNDRV_OSS_DEVICE_TYPE_PCM,
2438 pcm->card, index, &snd_pcm_oss_reg,
2440 snd_printk("unable to register OSS PCM device %i:%i\n", pcm->card->number, pcm->device);
2444 static int snd_pcm_oss_register_minor(snd_pcm_t * pcm)
2447 if (dsp_map[pcm->card->number] == (int)pcm->device) {
2450 register_oss_dsp(pcm, 0);
2451 duplex = (pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream_count > 0 &&
2452 pcm->streams[SNDRV_PCM_STREAM_CAPTURE].substream_count &&
2453 !(pcm->info_flags & SNDRV_PCM_INFO_HALF_DUPLEX));
2454 sprintf(name, "%s%s", pcm->name, duplex ? " (DUPLEX)" : "");
2455 #ifdef SNDRV_OSS_INFO_DEV_AUDIO
2456 snd_oss_info_register(SNDRV_OSS_INFO_DEV_AUDIO,
2461 pcm->oss.reg_mask |= 1;
2463 if (adsp_map[pcm->card->number] == (int)pcm->device) {
2464 register_oss_dsp(pcm, 1);
2466 pcm->oss.reg_mask |= 2;
2470 snd_pcm_oss_proc_init(pcm);
2475 static int snd_pcm_oss_disconnect_minor(snd_pcm_t * pcm)
2478 if (pcm->oss.reg_mask & 1) {
2479 pcm->oss.reg_mask &= ~1;
2480 snd_unregister_oss_device(SNDRV_OSS_DEVICE_TYPE_PCM,
2483 if (pcm->oss.reg_mask & 2) {
2484 pcm->oss.reg_mask &= ~2;
2485 snd_unregister_oss_device(SNDRV_OSS_DEVICE_TYPE_PCM,
2492 static int snd_pcm_oss_unregister_minor(snd_pcm_t * pcm)
2494 snd_pcm_oss_disconnect_minor(pcm);
2496 if (dsp_map[pcm->card->number] == (int)pcm->device) {
2497 #ifdef SNDRV_OSS_INFO_DEV_AUDIO
2498 snd_oss_info_unregister(SNDRV_OSS_INFO_DEV_AUDIO, pcm->card->number);
2502 snd_pcm_oss_proc_done(pcm);
2507 static snd_pcm_notify_t snd_pcm_oss_notify =
2509 .n_register = snd_pcm_oss_register_minor,
2510 .n_disconnect = snd_pcm_oss_disconnect_minor,
2511 .n_unregister = snd_pcm_oss_unregister_minor,
2514 static int __init alsa_pcm_oss_init(void)
2519 /* check device map table */
2520 for (i = 0; i < SNDRV_CARDS; i++) {
2521 if (dsp_map[i] < 0 || dsp_map[i] >= SNDRV_PCM_DEVICES) {
2522 snd_printk("invalid dsp_map[%d] = %d\n", i, dsp_map[i]);
2525 if (adsp_map[i] < 0 || adsp_map[i] >= SNDRV_PCM_DEVICES) {
2526 snd_printk("invalid adsp_map[%d] = %d\n", i, adsp_map[i]);
2530 if ((err = snd_pcm_notify(&snd_pcm_oss_notify, 0)) < 0)
2535 static void __exit alsa_pcm_oss_exit(void)
2537 snd_pcm_notify(&snd_pcm_oss_notify, 1);
2540 module_init(alsa_pcm_oss_init)
2541 module_exit(alsa_pcm_oss_exit)