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[ALSA] emu10k1: add details for the audigy player box version
[GitHub/mt8127/android_kernel_alcatel_ttab.git] / sound / core / oss / pcm_oss.c
CommitLineData
1da177e4
LT		 1/*
2 * Digital Audio (PCM) abstract layer / OSS compatible
3 * Copyright (c) by Jaroslav Kysela <perex@suse.cz>
4 *
5 *
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.
10 *
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.
15 *
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
19 *
20 */
21
22#if 0
23#define PLUGIN_DEBUG
24#endif
25#if 0
26#define OSS_DEBUG
27#endif
28
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 <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
45#define OSS_ALSAEMULVER _SIOR ('M', 249, int)
46
47static int dsp_map[SNDRV_CARDS] = {[0 ... (SNDRV_CARDS-1)] = 0};
48static int adsp_map[SNDRV_CARDS] = {[0 ... (SNDRV_CARDS-1)] = 1};
49static int nonblock_open = 1;
50
51MODULE_AUTHOR("Jaroslav Kysela <perex@suse.cz>, Abramo Bagnara <abramo@alsa-project.org>");
52MODULE_DESCRIPTION("PCM OSS emulation for ALSA.");
53MODULE_LICENSE("GPL");
54module_param_array(dsp_map, int, NULL, 0444);
55MODULE_PARM_DESC(dsp_map, "PCM device number assigned to 1st OSS device.");
56module_param_array(adsp_map, int, NULL, 0444);
57MODULE_PARM_DESC(adsp_map, "PCM device number assigned to 2nd OSS device.");
58module_param(nonblock_open, bool, 0644);
59MODULE_PARM_DESC(nonblock_open, "Don't block opening busy PCM devices.");
60MODULE_ALIAS_SNDRV_MINOR(SNDRV_MINOR_OSS_PCM);
61MODULE_ALIAS_SNDRV_MINOR(SNDRV_MINOR_OSS_PCM1);
62
63extern int snd_mixer_oss_ioctl_card(snd_card_t *card, unsigned int cmd, unsigned long arg);
64static int snd_pcm_oss_get_rate(snd_pcm_oss_file_t *pcm_oss_file);
65static int snd_pcm_oss_get_channels(snd_pcm_oss_file_t *pcm_oss_file);
66static int snd_pcm_oss_get_format(snd_pcm_oss_file_t *pcm_oss_file);
67
68static inline mm_segment_t snd_enter_user(void)
69{
70 mm_segment_t fs = get_fs();
71 set_fs(get_ds());
72 return fs;
73}
74
75static inline void snd_leave_user(mm_segment_t fs)
76{
77 set_fs(fs);
78}
79
80static int snd_pcm_oss_plugin_clear(snd_pcm_substream_t *substream)
81{
82 snd_pcm_runtime_t *runtime = substream->runtime;
83 snd_pcm_plugin_t *plugin, *next;
84
85 plugin = runtime->oss.plugin_first;
86 while (plugin) {
87 next = plugin->next;
88 snd_pcm_plugin_free(plugin);
89 plugin = next;
90 }
91 runtime->oss.plugin_first = runtime->oss.plugin_last = NULL;
92 return 0;
93}
94
95static int snd_pcm_plugin_insert(snd_pcm_plugin_t *plugin)
96{
97 snd_pcm_runtime_t *runtime = plugin->plug->runtime;
98 plugin->next = runtime->oss.plugin_first;
99 plugin->prev = NULL;
100 if (runtime->oss.plugin_first) {
101 runtime->oss.plugin_first->prev = plugin;
102 runtime->oss.plugin_first = plugin;
103 } else {
104 runtime->oss.plugin_last =
105 runtime->oss.plugin_first = plugin;
106 }
107 return 0;
108}
109
110int snd_pcm_plugin_append(snd_pcm_plugin_t *plugin)
111{
112 snd_pcm_runtime_t *runtime = plugin->plug->runtime;
113 plugin->next = NULL;
114 plugin->prev = runtime->oss.plugin_last;
115 if (runtime->oss.plugin_last) {
116 runtime->oss.plugin_last->next = plugin;
117 runtime->oss.plugin_last = plugin;
118 } else {
119 runtime->oss.plugin_last =
120 runtime->oss.plugin_first = plugin;
121 }
122 return 0;
123}
124
125static long snd_pcm_oss_bytes(snd_pcm_substream_t *substream, long frames)
126{
127 snd_pcm_runtime_t *runtime = substream->runtime;
af081613 128 long buffer_size = snd_pcm_lib_buffer_bytes(substream);
bfc5bddb 129 long bytes = frames_to_bytes(runtime, frames);
1da177e4 130 if (buffer_size == runtime->oss.buffer_bytes)
bfc5bddb
JK		 131 return bytes;
132 return (long)(((int64_t)runtime->oss.buffer_bytes * (int64_t)bytes) / (int64_t)buffer_size);
1da177e4
LT		 133}
134
135static long snd_pcm_alsa_frames(snd_pcm_substream_t *substream, long bytes)
136{
137 snd_pcm_runtime_t *runtime = substream->runtime;
af081613 138 long buffer_size = snd_pcm_lib_buffer_bytes(substream);
1da177e4
LT		 139 if (buffer_size == runtime->oss.buffer_bytes)
140 return bytes_to_frames(runtime, bytes);
141 return bytes_to_frames(runtime, (buffer_size * bytes) / runtime->oss.buffer_bytes);
142}
143
144static int snd_pcm_oss_format_from(int format)
145{
146 switch (format) {
147 case AFMT_MU_LAW: return SNDRV_PCM_FORMAT_MU_LAW;
148 case AFMT_A_LAW: return SNDRV_PCM_FORMAT_A_LAW;
149 case AFMT_IMA_ADPCM: return SNDRV_PCM_FORMAT_IMA_ADPCM;
150 case AFMT_U8: return SNDRV_PCM_FORMAT_U8;
151 case AFMT_S16_LE: return SNDRV_PCM_FORMAT_S16_LE;
152 case AFMT_S16_BE: return SNDRV_PCM_FORMAT_S16_BE;
153 case AFMT_S8: return SNDRV_PCM_FORMAT_S8;
154 case AFMT_U16_LE: return SNDRV_PCM_FORMAT_U16_LE;
155 case AFMT_U16_BE: return SNDRV_PCM_FORMAT_U16_BE;
156 case AFMT_MPEG: return SNDRV_PCM_FORMAT_MPEG;
157 default: return SNDRV_PCM_FORMAT_U8;
158 }
159}
160
161static int snd_pcm_oss_format_to(int format)
162{
163 switch (format) {
164 case SNDRV_PCM_FORMAT_MU_LAW: return AFMT_MU_LAW;
165 case SNDRV_PCM_FORMAT_A_LAW: return AFMT_A_LAW;
166 case SNDRV_PCM_FORMAT_IMA_ADPCM: return AFMT_IMA_ADPCM;
167 case SNDRV_PCM_FORMAT_U8: return AFMT_U8;
168 case SNDRV_PCM_FORMAT_S16_LE: return AFMT_S16_LE;
169 case SNDRV_PCM_FORMAT_S16_BE: return AFMT_S16_BE;
170 case SNDRV_PCM_FORMAT_S8: return AFMT_S8;
171 case SNDRV_PCM_FORMAT_U16_LE: return AFMT_U16_LE;
172 case SNDRV_PCM_FORMAT_U16_BE: return AFMT_U16_BE;
173 case SNDRV_PCM_FORMAT_MPEG: return AFMT_MPEG;
174 default: return -EINVAL;
175 }
176}
177
178static int snd_pcm_oss_period_size(snd_pcm_substream_t *substream,
179 snd_pcm_hw_params_t *oss_params,
180 snd_pcm_hw_params_t *slave_params)
181{
182 size_t s;
183 size_t oss_buffer_size, oss_period_size, oss_periods;
184 size_t min_period_size, max_period_size;
185 snd_pcm_runtime_t *runtime = substream->runtime;
186 size_t oss_frame_size;
187
188 oss_frame_size = snd_pcm_format_physical_width(params_format(oss_params)) *
189 params_channels(oss_params) / 8;
190
191 oss_buffer_size = snd_pcm_plug_client_size(substream,
192 snd_pcm_hw_param_value_max(slave_params, SNDRV_PCM_HW_PARAM_BUFFER_SIZE, NULL)) * oss_frame_size;
193 oss_buffer_size = 1 << ld2(oss_buffer_size);
194 if (atomic_read(&runtime->mmap_count)) {
195 if (oss_buffer_size > runtime->oss.mmap_bytes)
196 oss_buffer_size = runtime->oss.mmap_bytes;
197 }
198
199 if (substream->oss.setup &&
200 substream->oss.setup->period_size > 16)
201 oss_period_size = substream->oss.setup->period_size;
202 else if (runtime->oss.fragshift) {
203 oss_period_size = 1 << runtime->oss.fragshift;
204 if (oss_period_size > oss_buffer_size / 2)
205 oss_period_size = oss_buffer_size / 2;
206 } else {
207 int sd;
208 size_t bytes_per_sec = params_rate(oss_params) * snd_pcm_format_physical_width(params_format(oss_params)) * params_channels(oss_params) / 8;
209
210 oss_period_size = oss_buffer_size;
211 do {
212 oss_period_size /= 2;
213 } while (oss_period_size > bytes_per_sec);
214 if (runtime->oss.subdivision == 0) {
215 sd = 4;
216 if (oss_period_size / sd > 4096)
217 sd *= 2;
218 if (oss_period_size / sd < 4096)
219 sd = 1;
220 } else
221 sd = runtime->oss.subdivision;
222 oss_period_size /= sd;
223 if (oss_period_size < 16)
224 oss_period_size = 16;
225 }
226
227 min_period_size = snd_pcm_plug_client_size(substream,
228 snd_pcm_hw_param_value_min(slave_params, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, NULL));
229 min_period_size *= oss_frame_size;
230 min_period_size = 1 << (ld2(min_period_size - 1) + 1);
231 if (oss_period_size < min_period_size)
232 oss_period_size = min_period_size;
233
234 max_period_size = snd_pcm_plug_client_size(substream,
235 snd_pcm_hw_param_value_max(slave_params, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, NULL));
236 max_period_size *= oss_frame_size;
237 max_period_size = 1 << ld2(max_period_size);
238 if (oss_period_size > max_period_size)
239 oss_period_size = max_period_size;
240
241 oss_periods = oss_buffer_size / oss_period_size;
242
243 if (substream->oss.setup) {
244 if (substream->oss.setup->periods > 1)
245 oss_periods = substream->oss.setup->periods;
246 }
247
248 s = snd_pcm_hw_param_value_max(slave_params, SNDRV_PCM_HW_PARAM_PERIODS, NULL);
249 if (runtime->oss.maxfrags && s > runtime->oss.maxfrags)
250 s = runtime->oss.maxfrags;
251 if (oss_periods > s)
252 oss_periods = s;
253
254 s = snd_pcm_hw_param_value_min(slave_params, SNDRV_PCM_HW_PARAM_PERIODS, NULL);
255 if (s < 2)
256 s = 2;
257 if (oss_periods < s)
258 oss_periods = s;
259
260 while (oss_period_size * oss_periods > oss_buffer_size)
261 oss_period_size /= 2;
262
263 snd_assert(oss_period_size >= 16, return -EINVAL);
264 runtime->oss.period_bytes = oss_period_size;
265 runtime->oss.period_frames = 1;
266 runtime->oss.periods = oss_periods;
267 return 0;
268}
269
270static int choose_rate(snd_pcm_substream_t *substream,
271 snd_pcm_hw_params_t *params, unsigned int best_rate)
272{
273 snd_interval_t *it;
274 snd_pcm_hw_params_t *save;
275 unsigned int rate, prev;
276
277 save = kmalloc(sizeof(*save), GFP_KERNEL);
278 if (save == NULL)
279 return -ENOMEM;
280 *save = *params;
281 it = hw_param_interval(save, SNDRV_PCM_HW_PARAM_RATE);
282
283 /* try multiples of the best rate */
284 rate = best_rate;
285 for (;;) {
286 if (it->max < rate || (it->max == rate && it->openmax))
287 break;
288 if (it->min < rate || (it->min == rate && !it->openmin)) {
289 int ret;
290 ret = snd_pcm_hw_param_set(substream, params,
291 SNDRV_PCM_HW_PARAM_RATE,
292 rate, 0);
293 if (ret == (int)rate) {
294 kfree(save);
295 return rate;
296 }
297 *params = *save;
298 }
299 prev = rate;
300 rate += best_rate;
301 if (rate <= prev)
302 break;
303 }
304
305 /* not found, use the nearest rate */
306 kfree(save);
307 return snd_pcm_hw_param_near(substream, params, SNDRV_PCM_HW_PARAM_RATE, best_rate, NULL);
308}
309
310static int snd_pcm_oss_change_params(snd_pcm_substream_t *substream)
311{
312 snd_pcm_runtime_t *runtime = substream->runtime;
313 snd_pcm_hw_params_t *params, *sparams;
314 snd_pcm_sw_params_t *sw_params;
315 ssize_t oss_buffer_size, oss_period_size;
316 size_t oss_frame_size;
317 int err;
318 int direct;
319 int format, sformat, n;
320 snd_mask_t sformat_mask;
321 snd_mask_t mask;
322
323 sw_params = kmalloc(sizeof(*sw_params), GFP_KERNEL);
324 params = kmalloc(sizeof(*params), GFP_KERNEL);
325 sparams = kmalloc(sizeof(*sparams), GFP_KERNEL);
326 if (!sw_params || !params || !sparams) {
327 snd_printd("No memory\n");
328 err = -ENOMEM;
329 goto failure;
330 }
331
332 if (atomic_read(&runtime->mmap_count)) {
333 direct = 1;
334 } else {
335 snd_pcm_oss_setup_t *setup = substream->oss.setup;
336 direct = (setup != NULL && setup->direct);
337 }
338
339 _snd_pcm_hw_params_any(sparams);
340 _snd_pcm_hw_param_setinteger(sparams, SNDRV_PCM_HW_PARAM_PERIODS);
341 _snd_pcm_hw_param_min(sparams, SNDRV_PCM_HW_PARAM_PERIODS, 2, 0);
342 snd_mask_none(&mask);
343 if (atomic_read(&runtime->mmap_count))
344 snd_mask_set(&mask, SNDRV_PCM_ACCESS_MMAP_INTERLEAVED);
345 else {
346 snd_mask_set(&mask, SNDRV_PCM_ACCESS_RW_INTERLEAVED);
347 if (!direct)
348 snd_mask_set(&mask, SNDRV_PCM_ACCESS_RW_NONINTERLEAVED);
349 }
350 err = snd_pcm_hw_param_mask(substream, sparams, SNDRV_PCM_HW_PARAM_ACCESS, &mask);
351 if (err < 0) {
352 snd_printd("No usable accesses\n");
353 err = -EINVAL;
354 goto failure;
355 }
356 choose_rate(substream, sparams, runtime->oss.rate);
357 snd_pcm_hw_param_near(substream, sparams, SNDRV_PCM_HW_PARAM_CHANNELS, runtime->oss.channels, NULL);
358
359 format = snd_pcm_oss_format_from(runtime->oss.format);
360
361 sformat_mask = *hw_param_mask(sparams, SNDRV_PCM_HW_PARAM_FORMAT);
362 if (direct)
363 sformat = format;
364 else
365 sformat = snd_pcm_plug_slave_format(format, &sformat_mask);
366
367 if (sformat < 0 || !snd_mask_test(&sformat_mask, sformat)) {
368 for (sformat = 0; sformat <= SNDRV_PCM_FORMAT_LAST; sformat++) {
369 if (snd_mask_test(&sformat_mask, sformat) &&
370 snd_pcm_oss_format_to(sformat) >= 0)
371 break;
372 }
373 if (sformat > SNDRV_PCM_FORMAT_LAST) {
374 snd_printd("Cannot find a format!!!\n");
375 err = -EINVAL;
376 goto failure;
377 }
378 }
379 err = _snd_pcm_hw_param_set(sparams, SNDRV_PCM_HW_PARAM_FORMAT, sformat, 0);
380 snd_assert(err >= 0, goto failure);
381
382 if (direct) {
383 memcpy(params, sparams, sizeof(*params));
384 } else {
385 _snd_pcm_hw_params_any(params);
386 _snd_pcm_hw_param_set(params, SNDRV_PCM_HW_PARAM_ACCESS,
387 SNDRV_PCM_ACCESS_RW_INTERLEAVED, 0);
388 _snd_pcm_hw_param_set(params, SNDRV_PCM_HW_PARAM_FORMAT,
389 snd_pcm_oss_format_from(runtime->oss.format), 0);
390 _snd_pcm_hw_param_set(params, SNDRV_PCM_HW_PARAM_CHANNELS,
391 runtime->oss.channels, 0);
392 _snd_pcm_hw_param_set(params, SNDRV_PCM_HW_PARAM_RATE,
393 runtime->oss.rate, 0);
394 pdprintf("client: access = %i, format = %i, channels = %i, rate = %i\n",
395 params_access(params), params_format(params),
396 params_channels(params), params_rate(params));
397 }
398 pdprintf("slave: access = %i, format = %i, channels = %i, rate = %i\n",
399 params_access(sparams), params_format(sparams),
400 params_channels(sparams), params_rate(sparams));
401
402 oss_frame_size = snd_pcm_format_physical_width(params_format(params)) *
403 params_channels(params) / 8;
404
405 snd_pcm_oss_plugin_clear(substream);
406 if (!direct) {
407 /* add necessary plugins */
408 snd_pcm_oss_plugin_clear(substream);
409 if ((err = snd_pcm_plug_format_plugins(substream,
410 params,
411 sparams)) < 0) {
412 snd_printd("snd_pcm_plug_format_plugins failed: %i\n", err);
413 snd_pcm_oss_plugin_clear(substream);
414 goto failure;
415 }
416 if (runtime->oss.plugin_first) {
417 snd_pcm_plugin_t *plugin;
418 if ((err = snd_pcm_plugin_build_io(substream, sparams, &plugin)) < 0) {
419 snd_printd("snd_pcm_plugin_build_io failed: %i\n", err);
420 snd_pcm_oss_plugin_clear(substream);
421 goto failure;
422 }
423 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
424 err = snd_pcm_plugin_append(plugin);
425 } else {
426 err = snd_pcm_plugin_insert(plugin);
427 }
428 if (err < 0) {
429 snd_pcm_oss_plugin_clear(substream);
430 goto failure;
431 }
432 }
433 }
434
435 err = snd_pcm_oss_period_size(substream, params, sparams);
436 if (err < 0)
437 goto failure;
438
439 n = snd_pcm_plug_slave_size(substream, runtime->oss.period_bytes / oss_frame_size);
440 err = snd_pcm_hw_param_near(substream, sparams, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, n, NULL);
441 snd_assert(err >= 0, goto failure);
442
443 err = snd_pcm_hw_param_near(substream, sparams, SNDRV_PCM_HW_PARAM_PERIODS,
444 runtime->oss.periods, NULL);
445 snd_assert(err >= 0, goto failure);
446
447 snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DROP, NULL);
448
449 if ((err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_HW_PARAMS, sparams)) < 0) {
450 snd_printd("HW_PARAMS failed: %i\n", err);
451 goto failure;
452 }
453
454 memset(sw_params, 0, sizeof(*sw_params));
455 if (runtime->oss.trigger) {
456 sw_params->start_threshold = 1;
457 } else {
458 sw_params->start_threshold = runtime->boundary;
459 }
460 if (atomic_read(&runtime->mmap_count) || substream->stream == SNDRV_PCM_STREAM_CAPTURE)
461 sw_params->stop_threshold = runtime->boundary;
462 else
463 sw_params->stop_threshold = runtime->buffer_size;
464 sw_params->tstamp_mode = SNDRV_PCM_TSTAMP_NONE;
465 sw_params->period_step = 1;
466 sw_params->sleep_min = 0;
004e6538
TI		 467 sw_params->avail_min = substream->stream == SNDRV_PCM_STREAM_PLAYBACK ?
468 1 : runtime->period_size;
1da177e4
LT		 469 sw_params->xfer_align = 1;
470 if (atomic_read(&runtime->mmap_count) ||
471 (substream->oss.setup && substream->oss.setup->nosilence)) {
472 sw_params->silence_threshold = 0;
473 sw_params->silence_size = 0;
474 } else {
475 snd_pcm_uframes_t frames;
476 frames = runtime->period_size + 16;
477 if (frames > runtime->buffer_size)
478 frames = runtime->buffer_size;
479 sw_params->silence_threshold = frames;
480 sw_params->silence_size = frames;
481 }
482
483 if ((err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_SW_PARAMS, sw_params)) < 0) {
484 snd_printd("SW_PARAMS failed: %i\n", err);
485 goto failure;
486 }
487
488 runtime->oss.periods = params_periods(sparams);
489 oss_period_size = snd_pcm_plug_client_size(substream, params_period_size(sparams));
490 snd_assert(oss_period_size >= 0, err = -EINVAL; goto failure);
491 if (runtime->oss.plugin_first) {
492 err = snd_pcm_plug_alloc(substream, oss_period_size);
493 if (err < 0)
494 goto failure;
495 }
496 oss_period_size *= oss_frame_size;
497
498 oss_buffer_size = oss_period_size * runtime->oss.periods;
499 snd_assert(oss_buffer_size >= 0, err = -EINVAL; goto failure);
500
501 runtime->oss.period_bytes = oss_period_size;
502 runtime->oss.buffer_bytes = oss_buffer_size;
503
504 pdprintf("oss: period bytes = %i, buffer bytes = %i\n",
505 runtime->oss.period_bytes,
506 runtime->oss.buffer_bytes);
507 pdprintf("slave: period_size = %i, buffer_size = %i\n",
508 params_period_size(sparams),
509 params_buffer_size(sparams));
510
511 runtime->oss.format = snd_pcm_oss_format_to(params_format(params));
512 runtime->oss.channels = params_channels(params);
513 runtime->oss.rate = params_rate(params);
514
515 runtime->oss.params = 0;
516 runtime->oss.prepare = 1;
517 vfree(runtime->oss.buffer);
518 runtime->oss.buffer = vmalloc(runtime->oss.period_bytes);
519 runtime->oss.buffer_used = 0;
520 if (runtime->dma_area)
521 snd_pcm_format_set_silence(runtime->format, runtime->dma_area, bytes_to_samples(runtime, runtime->dma_bytes));
522
523 runtime->oss.period_frames = snd_pcm_alsa_frames(substream, oss_period_size);
524
525 err = 0;
526failure:
527 kfree(sw_params);
528 kfree(params);
529 kfree(sparams);
530 return err;
531}
532
533static int snd_pcm_oss_get_active_substream(snd_pcm_oss_file_t *pcm_oss_file, snd_pcm_substream_t **r_substream)
534{
535 int idx, err;
536 snd_pcm_substream_t *asubstream = NULL, *substream;
537
538 for (idx = 0; idx < 2; idx++) {
539 substream = pcm_oss_file->streams[idx];
540 if (substream == NULL)
541 continue;
542 if (asubstream == NULL)
543 asubstream = substream;
544 if (substream->runtime->oss.params) {
545 err = snd_pcm_oss_change_params(substream);
546 if (err < 0)
547 return err;
548 }
549 }
550 snd_assert(asubstream != NULL, return -EIO);
551 if (r_substream)
552 *r_substream = asubstream;
553 return 0;
554}
555
556static int snd_pcm_oss_prepare(snd_pcm_substream_t *substream)
557{
558 int err;
559 snd_pcm_runtime_t *runtime = substream->runtime;
560
561 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_PREPARE, NULL);
562 if (err < 0) {
563 snd_printd("snd_pcm_oss_prepare: SNDRV_PCM_IOCTL_PREPARE failed\n");
564 return err;
565 }
566 runtime->oss.prepare = 0;
567 runtime->oss.prev_hw_ptr_interrupt = 0;
568 runtime->oss.period_ptr = 0;
569 runtime->oss.buffer_used = 0;
570
571 return 0;
572}
573
574static int snd_pcm_oss_make_ready(snd_pcm_substream_t *substream)
575{
576 snd_pcm_runtime_t *runtime;
577 int err;
578
579 if (substream == NULL)
580 return 0;
581 runtime = substream->runtime;
582 if (runtime->oss.params) {
583 err = snd_pcm_oss_change_params(substream);
584 if (err < 0)
585 return err;
586 }
587 if (runtime->oss.prepare) {
588 err = snd_pcm_oss_prepare(substream);
589 if (err < 0)
590 return err;
591 }
592 return 0;
593}
594
595static int snd_pcm_oss_capture_position_fixup(snd_pcm_substream_t *substream, snd_pcm_sframes_t *delay)
596{
597 snd_pcm_runtime_t *runtime;
598 snd_pcm_uframes_t frames;
599 int err = 0;
600
601 while (1) {
602 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DELAY, delay);
603 if (err < 0)
604 break;
605 runtime = substream->runtime;
606 if (*delay <= (snd_pcm_sframes_t)runtime->buffer_size)
607 break;
608 /* in case of overrun, skip whole periods like OSS/Linux driver does */
609 /* until avail(delay) <= buffer_size */
610 frames = (*delay - runtime->buffer_size) + runtime->period_size - 1;
611 frames /= runtime->period_size;
612 frames *= runtime->period_size;
613 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_FORWARD, &frames);
614 if (err < 0)
615 break;
616 }
617 return err;
618}
619
620snd_pcm_sframes_t snd_pcm_oss_write3(snd_pcm_substream_t *substream, const char *ptr, snd_pcm_uframes_t frames, int in_kernel)
621{
622 snd_pcm_runtime_t *runtime = substream->runtime;
623 int ret;
624 while (1) {
625 if (runtime->status->state == SNDRV_PCM_STATE_XRUN ||
626 runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) {
627#ifdef OSS_DEBUG
628 if (runtime->status->state == SNDRV_PCM_STATE_XRUN)
629 printk("pcm_oss: write: recovering from XRUN\n");
630 else
631 printk("pcm_oss: write: recovering from SUSPEND\n");
632#endif
633 ret = snd_pcm_oss_prepare(substream);
634 if (ret < 0)
635 break;
636 }
637 if (in_kernel) {
638 mm_segment_t fs;
639 fs = snd_enter_user();
640 ret = snd_pcm_lib_write(substream, (void __user *)ptr, frames);
641 snd_leave_user(fs);
642 } else {
643 ret = snd_pcm_lib_write(substream, (void __user *)ptr, frames);
644 }
645 if (ret != -EPIPE && ret != -ESTRPIPE)
646 break;
647 /* test, if we can't store new data, because the stream */
648 /* has not been started */
649 if (runtime->status->state == SNDRV_PCM_STATE_PREPARED)
650 return -EAGAIN;
651 }
652 return ret;
653}
654
655snd_pcm_sframes_t snd_pcm_oss_read3(snd_pcm_substream_t *substream, char *ptr, snd_pcm_uframes_t frames, int in_kernel)
656{
657 snd_pcm_runtime_t *runtime = substream->runtime;
658 snd_pcm_sframes_t delay;
659 int ret;
660 while (1) {
661 if (runtime->status->state == SNDRV_PCM_STATE_XRUN ||
662 runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) {
663#ifdef OSS_DEBUG
664 if (runtime->status->state == SNDRV_PCM_STATE_XRUN)
665 printk("pcm_oss: read: recovering from XRUN\n");
666 else
667 printk("pcm_oss: read: recovering from SUSPEND\n");
668#endif
669 ret = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DRAIN, NULL);
670 if (ret < 0)
671 break;
672 } else if (runtime->status->state == SNDRV_PCM_STATE_SETUP) {
673 ret = snd_pcm_oss_prepare(substream);
674 if (ret < 0)
675 break;
676 }
677 ret = snd_pcm_oss_capture_position_fixup(substream, &delay);
678 if (ret < 0)
679 break;
680 if (in_kernel) {
681 mm_segment_t fs;
682 fs = snd_enter_user();
683 ret = snd_pcm_lib_read(substream, (void __user *)ptr, frames);
684 snd_leave_user(fs);
685 } else {
686 ret = snd_pcm_lib_read(substream, (void __user *)ptr, frames);
687 }
688 if (ret == -EPIPE) {
689 if (runtime->status->state == SNDRV_PCM_STATE_DRAINING) {
690 ret = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DROP, NULL);
691 if (ret < 0)
692 break;
693 }
694 continue;
695 }
696 if (ret != -ESTRPIPE)
697 break;
698 }
699 return ret;
700}
701
702snd_pcm_sframes_t snd_pcm_oss_writev3(snd_pcm_substream_t *substream, void **bufs, snd_pcm_uframes_t frames, int in_kernel)
703{
704 snd_pcm_runtime_t *runtime = substream->runtime;
705 int ret;
706 while (1) {
707 if (runtime->status->state == SNDRV_PCM_STATE_XRUN ||
708 runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) {
709#ifdef OSS_DEBUG
710 if (runtime->status->state == SNDRV_PCM_STATE_XRUN)
711 printk("pcm_oss: writev: recovering from XRUN\n");
712 else
713 printk("pcm_oss: writev: recovering from SUSPEND\n");
714#endif
715 ret = snd_pcm_oss_prepare(substream);
716 if (ret < 0)
717 break;
718 }
719 if (in_kernel) {
720 mm_segment_t fs;
721 fs = snd_enter_user();
722 ret = snd_pcm_lib_writev(substream, (void __user **)bufs, frames);
723 snd_leave_user(fs);
724 } else {
725 ret = snd_pcm_lib_writev(substream, (void __user **)bufs, frames);
726 }
727 if (ret != -EPIPE && ret != -ESTRPIPE)
728 break;
729
730 /* test, if we can't store new data, because the stream */
731 /* has not been started */
732 if (runtime->status->state == SNDRV_PCM_STATE_PREPARED)
733 return -EAGAIN;
734 }
735 return ret;
736}
737
738snd_pcm_sframes_t snd_pcm_oss_readv3(snd_pcm_substream_t *substream, void **bufs, snd_pcm_uframes_t frames, int in_kernel)
739{
740 snd_pcm_runtime_t *runtime = substream->runtime;
741 int ret;
742 while (1) {
743 if (runtime->status->state == SNDRV_PCM_STATE_XRUN ||
744 runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) {
745#ifdef OSS_DEBUG
746 if (runtime->status->state == SNDRV_PCM_STATE_XRUN)
747 printk("pcm_oss: readv: recovering from XRUN\n");
748 else
749 printk("pcm_oss: readv: recovering from SUSPEND\n");
750#endif
751 ret = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DRAIN, NULL);
752 if (ret < 0)
753 break;
754 } else if (runtime->status->state == SNDRV_PCM_STATE_SETUP) {
755 ret = snd_pcm_oss_prepare(substream);
756 if (ret < 0)
757 break;
758 }
759 if (in_kernel) {
760 mm_segment_t fs;
761 fs = snd_enter_user();
762 ret = snd_pcm_lib_readv(substream, (void __user **)bufs, frames);
763 snd_leave_user(fs);
764 } else {
765 ret = snd_pcm_lib_readv(substream, (void __user **)bufs, frames);
766 }
767 if (ret != -EPIPE && ret != -ESTRPIPE)
768 break;
769 }
770 return ret;
771}
772
773static ssize_t snd_pcm_oss_write2(snd_pcm_substream_t *substream, const char *buf, size_t bytes, int in_kernel)
774{
775 snd_pcm_runtime_t *runtime = substream->runtime;
776 snd_pcm_sframes_t frames, frames1;
777 if (runtime->oss.plugin_first) {
778 snd_pcm_plugin_channel_t *channels;
779 size_t oss_frame_bytes = (runtime->oss.plugin_first->src_width * runtime->oss.plugin_first->src_format.channels) / 8;
780 if (!in_kernel) {
781 if (copy_from_user(runtime->oss.buffer, (const char __user *)buf, bytes))
782 return -EFAULT;
783 buf = runtime->oss.buffer;
784 }
785 frames = bytes / oss_frame_bytes;
786 frames1 = snd_pcm_plug_client_channels_buf(substream, (char *)buf, frames, &channels);
787 if (frames1 < 0)
788 return frames1;
789 frames1 = snd_pcm_plug_write_transfer(substream, channels, frames1);
790 if (frames1 <= 0)
791 return frames1;
792 bytes = frames1 * oss_frame_bytes;
793 } else {
794 frames = bytes_to_frames(runtime, bytes);
795 frames1 = snd_pcm_oss_write3(substream, buf, frames, in_kernel);
796 if (frames1 <= 0)
797 return frames1;
798 bytes = frames_to_bytes(runtime, frames1);
799 }
800 return bytes;
801}
802
803static ssize_t snd_pcm_oss_write1(snd_pcm_substream_t *substream, const char __user *buf, size_t bytes)
804{
805 size_t xfer = 0;
806 ssize_t tmp;
807 snd_pcm_runtime_t *runtime = substream->runtime;
808
809 if (atomic_read(&runtime->mmap_count))
810 return -ENXIO;
811
812 if ((tmp = snd_pcm_oss_make_ready(substream)) < 0)
813 return tmp;
814 while (bytes > 0) {
815 if (bytes < runtime->oss.period_bytes || runtime->oss.buffer_used > 0) {
816 tmp = bytes;
817 if (tmp + runtime->oss.buffer_used > runtime->oss.period_bytes)
818 tmp = runtime->oss.period_bytes - runtime->oss.buffer_used;
819 if (tmp > 0) {
820 if (copy_from_user(runtime->oss.buffer + runtime->oss.buffer_used, buf, tmp))
821 return xfer > 0 ? (snd_pcm_sframes_t)xfer : -EFAULT;
822 }
823 runtime->oss.buffer_used += tmp;
824 buf += tmp;
825 bytes -= tmp;
826 xfer += tmp;
827 if ((substream->oss.setup != NULL && substream->oss.setup->partialfrag) ||
828 runtime->oss.buffer_used == runtime->oss.period_bytes) {
829 tmp = snd_pcm_oss_write2(substream, runtime->oss.buffer + runtime->oss.period_ptr,
830 runtime->oss.buffer_used - runtime->oss.period_ptr, 1);
831 if (tmp <= 0)
832 return xfer > 0 ? (snd_pcm_sframes_t)xfer : tmp;
833 runtime->oss.bytes += tmp;
834 runtime->oss.period_ptr += tmp;
835 runtime->oss.period_ptr %= runtime->oss.period_bytes;
836 if (runtime->oss.period_ptr == 0 ||
837 runtime->oss.period_ptr == runtime->oss.buffer_used)
838 runtime->oss.buffer_used = 0;
839 else if ((substream->ffile->f_flags & O_NONBLOCK) != 0)
840 return xfer > 0 ? xfer : -EAGAIN;
841 }
842 } else {
843 tmp = snd_pcm_oss_write2(substream, (const char *)buf, runtime->oss.period_bytes, 0);
844 if (tmp <= 0)
845 return xfer > 0 ? (snd_pcm_sframes_t)xfer : tmp;
846 runtime->oss.bytes += tmp;
847 buf += tmp;
848 bytes -= tmp;
849 xfer += tmp;
850 if ((substream->ffile->f_flags & O_NONBLOCK) != 0 &&
851 tmp != runtime->oss.period_bytes)
852 break;
853 }
854 }
855 return xfer;
856}
857
858static ssize_t snd_pcm_oss_read2(snd_pcm_substream_t *substream, char *buf, size_t bytes, int in_kernel)
859{
860 snd_pcm_runtime_t *runtime = substream->runtime;
861 snd_pcm_sframes_t frames, frames1;
862 char __user *final_dst = (char __user *)buf;
863 if (runtime->oss.plugin_first) {
864 snd_pcm_plugin_channel_t *channels;
865 size_t oss_frame_bytes = (runtime->oss.plugin_last->dst_width * runtime->oss.plugin_last->dst_format.channels) / 8;
866 if (!in_kernel)
867 buf = runtime->oss.buffer;
868 frames = bytes / oss_frame_bytes;
869 frames1 = snd_pcm_plug_client_channels_buf(substream, buf, frames, &channels);
870 if (frames1 < 0)
871 return frames1;
872 frames1 = snd_pcm_plug_read_transfer(substream, channels, frames1);
873 if (frames1 <= 0)
874 return frames1;
875 bytes = frames1 * oss_frame_bytes;
876 if (!in_kernel && copy_to_user(final_dst, buf, bytes))
877 return -EFAULT;
878 } else {
879 frames = bytes_to_frames(runtime, bytes);
880 frames1 = snd_pcm_oss_read3(substream, buf, frames, in_kernel);
881 if (frames1 <= 0)
882 return frames1;
883 bytes = frames_to_bytes(runtime, frames1);
884 }
885 return bytes;
886}
887
888static ssize_t snd_pcm_oss_read1(snd_pcm_substream_t *substream, char __user *buf, size_t bytes)
889{
890 size_t xfer = 0;
891 ssize_t tmp;
892 snd_pcm_runtime_t *runtime = substream->runtime;
893
894 if (atomic_read(&runtime->mmap_count))
895 return -ENXIO;
896
897 if ((tmp = snd_pcm_oss_make_ready(substream)) < 0)
898 return tmp;
899 while (bytes > 0) {
900 if (bytes < runtime->oss.period_bytes || runtime->oss.buffer_used > 0) {
901 if (runtime->oss.buffer_used == 0) {
902 tmp = snd_pcm_oss_read2(substream, runtime->oss.buffer, runtime->oss.period_bytes, 1);
903 if (tmp <= 0)
904 return xfer > 0 ? (snd_pcm_sframes_t)xfer : tmp;
905 runtime->oss.bytes += tmp;
906 runtime->oss.period_ptr = tmp;
907 runtime->oss.buffer_used = tmp;
908 }
909 tmp = bytes;
910 if ((size_t) tmp > runtime->oss.buffer_used)
911 tmp = runtime->oss.buffer_used;
912 if (copy_to_user(buf, runtime->oss.buffer + (runtime->oss.period_ptr - runtime->oss.buffer_used), tmp))
913 return xfer > 0 ? (snd_pcm_sframes_t)xfer : -EFAULT;
914 buf += tmp;
915 bytes -= tmp;
916 xfer += tmp;
917 runtime->oss.buffer_used -= tmp;
918 } else {
919 tmp = snd_pcm_oss_read2(substream, (char *)buf, runtime->oss.period_bytes, 0);
920 if (tmp <= 0)
921 return xfer > 0 ? (snd_pcm_sframes_t)xfer : tmp;
922 runtime->oss.bytes += tmp;
923 buf += tmp;
924 bytes -= tmp;
925 xfer += tmp;
926 }
927 }
928 return xfer;
929}
930
931static int snd_pcm_oss_reset(snd_pcm_oss_file_t *pcm_oss_file)
932{
933 snd_pcm_substream_t *substream;
934
935 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
936 if (substream != NULL) {
937 snd_pcm_kernel_playback_ioctl(substream, SNDRV_PCM_IOCTL_DROP, NULL);
938 substream->runtime->oss.prepare = 1;
939 }
940 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
941 if (substream != NULL) {
942 snd_pcm_kernel_capture_ioctl(substream, SNDRV_PCM_IOCTL_DROP, NULL);
943 substream->runtime->oss.prepare = 1;
944 }
945 return 0;
946}
947
948static int snd_pcm_oss_post(snd_pcm_oss_file_t *pcm_oss_file)
949{
950 snd_pcm_substream_t *substream;
951 int err;
952
953 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
954 if (substream != NULL) {
955 if ((err = snd_pcm_oss_make_ready(substream)) < 0)
956 return err;
957 snd_pcm_kernel_playback_ioctl(substream, SNDRV_PCM_IOCTL_START, NULL);
958 }
959 /* note: all errors from the start action are ignored */
960 /* OSS apps do not know, how to handle them */
961 return 0;
962}
963
964static int snd_pcm_oss_sync1(snd_pcm_substream_t *substream, size_t size)
965{
966 snd_pcm_runtime_t *runtime;
967 ssize_t result = 0;
968 long res;
969 wait_queue_t wait;
970
971 runtime = substream->runtime;
972 init_waitqueue_entry(&wait, current);
973 add_wait_queue(&runtime->sleep, &wait);
974#ifdef OSS_DEBUG
975 printk("sync1: size = %li\n", size);
976#endif
977 while (1) {
978 result = snd_pcm_oss_write2(substream, runtime->oss.buffer, size, 1);
979 if (result > 0) {
980 runtime->oss.buffer_used = 0;
981 result = 0;
982 break;
983 }
984 if (result != 0 && result != -EAGAIN)
985 break;
986 result = 0;
987 set_current_state(TASK_INTERRUPTIBLE);
988 snd_pcm_stream_lock_irq(substream);
989 res = runtime->status->state;
990 snd_pcm_stream_unlock_irq(substream);
991 if (res != SNDRV_PCM_STATE_RUNNING) {
992 set_current_state(TASK_RUNNING);
993 break;
994 }
995 res = schedule_timeout(10 * HZ);
996 if (signal_pending(current)) {
997 result = -ERESTARTSYS;
998 break;
999 }
1000 if (res == 0) {
1001 snd_printk(KERN_ERR "OSS sync error - DMA timeout\n");
1002 result = -EIO;
1003 break;
1004 }
1005 }
1006 remove_wait_queue(&runtime->sleep, &wait);
1007 return result;
1008}
1009
1010static int snd_pcm_oss_sync(snd_pcm_oss_file_t *pcm_oss_file)
1011{
1012 int err = 0;
1013 unsigned int saved_f_flags;
1014 snd_pcm_substream_t *substream;
1015 snd_pcm_runtime_t *runtime;
1016 snd_pcm_format_t format;
1017 unsigned long width;
1018 size_t size;
1019
1020 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
1021 if (substream != NULL) {
1022 runtime = substream->runtime;
1023 if (atomic_read(&runtime->mmap_count))
1024 goto __direct;
1025 if ((err = snd_pcm_oss_make_ready(substream)) < 0)
1026 return err;
1027 format = snd_pcm_oss_format_from(runtime->oss.format);
1028 width = snd_pcm_format_physical_width(format);
1029 if (runtime->oss.buffer_used > 0) {
1030#ifdef OSS_DEBUG
1031 printk("sync: buffer_used\n");
1032#endif
1033 size = (8 * (runtime->oss.period_bytes - runtime->oss.buffer_used) + 7) / width;
1034 snd_pcm_format_set_silence(format,
1035 runtime->oss.buffer + runtime->oss.buffer_used,
1036 size);
1037 err = snd_pcm_oss_sync1(substream, runtime->oss.period_bytes);
1038 if (err < 0)
1039 return err;
1040 } else if (runtime->oss.period_ptr > 0) {
1041#ifdef OSS_DEBUG
1042 printk("sync: period_ptr\n");
1043#endif
1044 size = runtime->oss.period_bytes - runtime->oss.period_ptr;
1045 snd_pcm_format_set_silence(format,
1046 runtime->oss.buffer,
1047 size * 8 / width);
1048 err = snd_pcm_oss_sync1(substream, size);
1049 if (err < 0)
1050 return err;
1051 }
1052 /*
1053 * The ALSA's period might be a bit large than OSS one.
1054 * Fill the remain portion of ALSA period with zeros.
1055 */
1056 size = runtime->control->appl_ptr % runtime->period_size;
1057 if (size > 0) {
1058 size = runtime->period_size - size;
1059 if (runtime->access == SNDRV_PCM_ACCESS_RW_INTERLEAVED) {
1060 size = (runtime->frame_bits * size) / 8;
1061 while (size > 0) {
1062 mm_segment_t fs;
1063 size_t size1 = size < runtime->oss.period_bytes ? size : runtime->oss.period_bytes;
1064 size -= size1;
1065 size1 *= 8;
1066 size1 /= runtime->sample_bits;
1067 snd_pcm_format_set_silence(runtime->format,
1068 runtime->oss.buffer,
1069 size1);
1070 fs = snd_enter_user();
1071 snd_pcm_lib_write(substream, (void __user *)runtime->oss.buffer, size1);
1072 snd_leave_user(fs);
1073 }
1074 } else if (runtime->access == SNDRV_PCM_ACCESS_RW_NONINTERLEAVED) {
1075 void __user *buffers[runtime->channels];
1076 memset(buffers, 0, runtime->channels * sizeof(void *));
1077 snd_pcm_lib_writev(substream, buffers, size);
1078 }
1079 }
1080 /*
1081 * finish sync: drain the buffer
1082 */
1083 __direct:
1084 saved_f_flags = substream->ffile->f_flags;
1085 substream->ffile->f_flags &= ~O_NONBLOCK;
1086 err = snd_pcm_kernel_playback_ioctl(substream, SNDRV_PCM_IOCTL_DRAIN, NULL);
1087 substream->ffile->f_flags = saved_f_flags;
1088 if (err < 0)
1089 return err;
1090 runtime->oss.prepare = 1;
1091 }
1092
1093 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
1094 if (substream != NULL) {
1095 if ((err = snd_pcm_oss_make_ready(substream)) < 0)
1096 return err;
1097 runtime = substream->runtime;
1098 err = snd_pcm_kernel_capture_ioctl(substream, SNDRV_PCM_IOCTL_DROP, NULL);
1099 if (err < 0)
1100 return err;
1101 runtime->oss.buffer_used = 0;
1102 runtime->oss.prepare = 1;
1103 }
1104 return 0;
1105}
1106
1107static int snd_pcm_oss_set_rate(snd_pcm_oss_file_t *pcm_oss_file, int rate)
1108{
1109 int idx;
1110
1111 for (idx = 1; idx >= 0; --idx) {
1112 snd_pcm_substream_t *substream = pcm_oss_file->streams[idx];
1113 snd_pcm_runtime_t *runtime;
1114 if (substream == NULL)
1115 continue;
1116 runtime = substream->runtime;
1117 if (rate < 1000)
1118 rate = 1000;
1119 else if (rate > 192000)
1120 rate = 192000;
1121 if (runtime->oss.rate != rate) {
1122 runtime->oss.params = 1;
1123 runtime->oss.rate = rate;
1124 }
1125 }
1126 return snd_pcm_oss_get_rate(pcm_oss_file);
1127}
1128
1129static int snd_pcm_oss_get_rate(snd_pcm_oss_file_t *pcm_oss_file)
1130{
1131 snd_pcm_substream_t *substream;
1132 int err;
1133
1134 if ((err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream)) < 0)
1135 return err;
1136 return substream->runtime->oss.rate;
1137}
1138
1139static int snd_pcm_oss_set_channels(snd_pcm_oss_file_t *pcm_oss_file, unsigned int channels)
1140{
1141 int idx;
1142 if (channels < 1)
1143 channels = 1;
1144 if (channels > 128)
1145 return -EINVAL;
1146 for (idx = 1; idx >= 0; --idx) {
1147 snd_pcm_substream_t *substream = pcm_oss_file->streams[idx];
1148 snd_pcm_runtime_t *runtime;
1149 if (substream == NULL)
1150 continue;
1151 runtime = substream->runtime;
1152 if (runtime->oss.channels != channels) {
1153 runtime->oss.params = 1;
1154 runtime->oss.channels = channels;
1155 }
1156 }
1157 return snd_pcm_oss_get_channels(pcm_oss_file);
1158}
1159
1160static int snd_pcm_oss_get_channels(snd_pcm_oss_file_t *pcm_oss_file)
1161{
1162 snd_pcm_substream_t *substream;
1163 int err;
1164
1165 if ((err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream)) < 0)
1166 return err;
1167 return substream->runtime->oss.channels;
1168}
1169
1170static int snd_pcm_oss_get_block_size(snd_pcm_oss_file_t *pcm_oss_file)
1171{
1172 snd_pcm_substream_t *substream;
1173 int err;
1174
1175 if ((err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream)) < 0)
1176 return err;
1177 return substream->runtime->oss.period_bytes;
1178}
1179
1180static int snd_pcm_oss_get_formats(snd_pcm_oss_file_t *pcm_oss_file)
1181{
1182 snd_pcm_substream_t *substream;
1183 int err;
1184 int direct;
1185 snd_pcm_hw_params_t *params;
1186 unsigned int formats = 0;
1187 snd_mask_t format_mask;
1188 int fmt;
1189
1190 if ((err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream)) < 0)
1191 return err;
1192 if (atomic_read(&substream->runtime->mmap_count)) {
1193 direct = 1;
1194 } else {
1195 snd_pcm_oss_setup_t *setup = substream->oss.setup;
1196 direct = (setup != NULL && setup->direct);
1197 }
1198 if (!direct)
1199 return AFMT_MU_LAW | AFMT_U8 |
1200 AFMT_S16_LE | AFMT_S16_BE |
1201 AFMT_S8 | AFMT_U16_LE |
1202 AFMT_U16_BE;
1203 params = kmalloc(sizeof(*params), GFP_KERNEL);
1204 if (!params)
1205 return -ENOMEM;
1206 _snd_pcm_hw_params_any(params);
1207 err = snd_pcm_hw_refine(substream, params);
1208 format_mask = *hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT);
1209 kfree(params);
1210 snd_assert(err >= 0, return err);
1211 for (fmt = 0; fmt < 32; ++fmt) {
1212 if (snd_mask_test(&format_mask, fmt)) {
1213 int f = snd_pcm_oss_format_to(fmt);
1214 if (f >= 0)
1215 formats |= f;
1216 }
1217 }
1218 return formats;
1219}
1220
1221static int snd_pcm_oss_set_format(snd_pcm_oss_file_t *pcm_oss_file, int format)
1222{
1223 int formats, idx;
1224
1225 if (format != AFMT_QUERY) {
1226 formats = snd_pcm_oss_get_formats(pcm_oss_file);
1227 if (!(formats & format))
1228 format = AFMT_U8;
1229 for (idx = 1; idx >= 0; --idx) {
1230 snd_pcm_substream_t *substream = pcm_oss_file->streams[idx];
1231 snd_pcm_runtime_t *runtime;
1232 if (substream == NULL)
1233 continue;
1234 runtime = substream->runtime;
1235 if (runtime->oss.format != format) {
1236 runtime->oss.params = 1;
1237 runtime->oss.format = format;
1238 }
1239 }
1240 }
1241 return snd_pcm_oss_get_format(pcm_oss_file);
1242}
1243
1244static int snd_pcm_oss_get_format(snd_pcm_oss_file_t *pcm_oss_file)
1245{
1246 snd_pcm_substream_t *substream;
1247 int err;
1248
1249 if ((err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream)) < 0)
1250 return err;
1251 return substream->runtime->oss.format;
1252}
1253
1254static int snd_pcm_oss_set_subdivide1(snd_pcm_substream_t *substream, int subdivide)
1255{
1256 snd_pcm_runtime_t *runtime;
1257
1258 if (substream == NULL)
1259 return 0;
1260 runtime = substream->runtime;
1261 if (subdivide == 0) {
1262 subdivide = runtime->oss.subdivision;
1263 if (subdivide == 0)
1264 subdivide = 1;
1265 return subdivide;
1266 }
1267 if (runtime->oss.subdivision || runtime->oss.fragshift)
1268 return -EINVAL;
1269 if (subdivide != 1 && subdivide != 2 && subdivide != 4 &&
1270 subdivide != 8 && subdivide != 16)
1271 return -EINVAL;
1272 runtime->oss.subdivision = subdivide;
1273 runtime->oss.params = 1;
1274 return subdivide;
1275}
1276
1277static int snd_pcm_oss_set_subdivide(snd_pcm_oss_file_t *pcm_oss_file, int subdivide)
1278{
1279 int err = -EINVAL, idx;
1280
1281 for (idx = 1; idx >= 0; --idx) {
1282 snd_pcm_substream_t *substream = pcm_oss_file->streams[idx];
1283 if (substream == NULL)
1284 continue;
1285 if ((err = snd_pcm_oss_set_subdivide1(substream, subdivide)) < 0)
1286 return err;
1287 }
1288 return err;
1289}
1290
1291static int snd_pcm_oss_set_fragment1(snd_pcm_substream_t *substream, unsigned int val)
1292{
1293 snd_pcm_runtime_t *runtime;
1294
1295 if (substream == NULL)
1296 return 0;
1297 runtime = substream->runtime;
1298 if (runtime->oss.subdivision || runtime->oss.fragshift)
1299 return -EINVAL;
1300 runtime->oss.fragshift = val & 0xffff;
1301 runtime->oss.maxfrags = (val >> 16) & 0xffff;
1302 if (runtime->oss.fragshift < 4) /* < 16 */
1303 runtime->oss.fragshift = 4;
1304 if (runtime->oss.maxfrags < 2)
1305 runtime->oss.maxfrags = 2;
1306 runtime->oss.params = 1;
1307 return 0;
1308}
1309
1310static int snd_pcm_oss_set_fragment(snd_pcm_oss_file_t *pcm_oss_file, unsigned int val)
1311{
1312 int err = -EINVAL, idx;
1313
1314 for (idx = 1; idx >= 0; --idx) {
1315 snd_pcm_substream_t *substream = pcm_oss_file->streams[idx];
1316 if (substream == NULL)
1317 continue;
1318 if ((err = snd_pcm_oss_set_fragment1(substream, val)) < 0)
1319 return err;
1320 }
1321 return err;
1322}
1323
1324static int snd_pcm_oss_nonblock(struct file * file)
1325{
1326 file->f_flags |= O_NONBLOCK;
1327 return 0;
1328}
1329
1330static int snd_pcm_oss_get_caps1(snd_pcm_substream_t *substream, int res)
1331{
1332
1333 if (substream == NULL) {
1334 res &= ~DSP_CAP_DUPLEX;
1335 return res;
1336 }
1337#ifdef DSP_CAP_MULTI
1338 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
1339 if (substream->pstr->substream_count > 1)
1340 res |= DSP_CAP_MULTI;
1341#endif
1342 /* DSP_CAP_REALTIME is set all times: */
1343 /* all ALSA drivers can return actual pointer in ring buffer */
1344#if defined(DSP_CAP_REALTIME) && 0
1345 {
1346 snd_pcm_runtime_t *runtime = substream->runtime;
1347 if (runtime->info & (SNDRV_PCM_INFO_BLOCK_TRANSFER|SNDRV_PCM_INFO_BATCH))
1348 res &= ~DSP_CAP_REALTIME;
1349 }
1350#endif
1351 return res;
1352}
1353
1354static int snd_pcm_oss_get_caps(snd_pcm_oss_file_t *pcm_oss_file)
1355{
1356 int result, idx;
1357
1358 result = DSP_CAP_TRIGGER | DSP_CAP_MMAP | DSP_CAP_DUPLEX | DSP_CAP_REALTIME;
1359 for (idx = 0; idx < 2; idx++) {
1360 snd_pcm_substream_t *substream = pcm_oss_file->streams[idx];
1361 result = snd_pcm_oss_get_caps1(substream, result);
1362 }
1363 result |= 0x0001; /* revision - same as SB AWE 64 */
1364 return result;
1365}
1366
1367static void snd_pcm_oss_simulate_fill(snd_pcm_substream_t *substream, snd_pcm_uframes_t hw_ptr)
1368{
1369 snd_pcm_runtime_t *runtime = substream->runtime;
1370 snd_pcm_uframes_t appl_ptr;
1371 appl_ptr = hw_ptr + runtime->buffer_size;
1372 appl_ptr %= runtime->boundary;
1373 runtime->control->appl_ptr = appl_ptr;
1374}
1375
1376static int snd_pcm_oss_set_trigger(snd_pcm_oss_file_t *pcm_oss_file, int trigger)
1377{
1378 snd_pcm_runtime_t *runtime;
1379 snd_pcm_substream_t *psubstream = NULL, *csubstream = NULL;
1380 int err, cmd;
1381
1382#ifdef OSS_DEBUG
1383 printk("pcm_oss: trigger = 0x%x\n", trigger);
1384#endif
1385
1386 psubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
1387 csubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
1388
1389 if (psubstream) {
1390 if ((err = snd_pcm_oss_make_ready(psubstream)) < 0)
1391 return err;
1392 }
1393 if (csubstream) {
1394 if ((err = snd_pcm_oss_make_ready(csubstream)) < 0)
1395 return err;
1396 }
1397 if (psubstream) {
1398 runtime = psubstream->runtime;
1399 if (trigger & PCM_ENABLE_OUTPUT) {
1400 if (runtime->oss.trigger)
1401 goto _skip1;
1402 if (atomic_read(&psubstream->runtime->mmap_count))
1403 snd_pcm_oss_simulate_fill(psubstream, runtime->hw_ptr_interrupt);
1404 runtime->oss.trigger = 1;
1405 runtime->start_threshold = 1;
1406 cmd = SNDRV_PCM_IOCTL_START;
1407 } else {
1408 if (!runtime->oss.trigger)
1409 goto _skip1;
1410 runtime->oss.trigger = 0;
1411 runtime->start_threshold = runtime->boundary;
1412 cmd = SNDRV_PCM_IOCTL_DROP;
1413 runtime->oss.prepare = 1;
1414 }
1415 err = snd_pcm_kernel_playback_ioctl(psubstream, cmd, NULL);
1416 if (err < 0)
1417 return err;
1418 }
1419 _skip1:
1420 if (csubstream) {
1421 runtime = csubstream->runtime;
1422 if (trigger & PCM_ENABLE_INPUT) {
1423 if (runtime->oss.trigger)
1424 goto _skip2;
1425 runtime->oss.trigger = 1;
1426 runtime->start_threshold = 1;
1427 cmd = SNDRV_PCM_IOCTL_START;
1428 } else {
1429 if (!runtime->oss.trigger)
1430 goto _skip2;
1431 runtime->oss.trigger = 0;
1432 runtime->start_threshold = runtime->boundary;
1433 cmd = SNDRV_PCM_IOCTL_DROP;
1434 runtime->oss.prepare = 1;
1435 }
1436 err = snd_pcm_kernel_capture_ioctl(csubstream, cmd, NULL);
1437 if (err < 0)
1438 return err;
1439 }
1440 _skip2:
1441 return 0;
1442}
1443
1444static int snd_pcm_oss_get_trigger(snd_pcm_oss_file_t *pcm_oss_file)
1445{
1446 snd_pcm_substream_t *psubstream = NULL, *csubstream = NULL;
1447 int result = 0;
1448
1449 psubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
1450 csubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
1451 if (psubstream && psubstream->runtime && psubstream->runtime->oss.trigger)
1452 result |= PCM_ENABLE_OUTPUT;
1453 if (csubstream && csubstream->runtime && csubstream->runtime->oss.trigger)
1454 result |= PCM_ENABLE_INPUT;
1455 return result;
1456}
1457
1458static int snd_pcm_oss_get_odelay(snd_pcm_oss_file_t *pcm_oss_file)
1459{
1460 snd_pcm_substream_t *substream;
1461 snd_pcm_runtime_t *runtime;
1462 snd_pcm_sframes_t delay;
1463 int err;
1464
1465 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
1466 if (substream == NULL)
1467 return -EINVAL;
1468 if ((err = snd_pcm_oss_make_ready(substream)) < 0)
1469 return err;
1470 runtime = substream->runtime;
1471 if (runtime->oss.params || runtime->oss.prepare)
1472 return 0;
1473 err = snd_pcm_kernel_playback_ioctl(substream, SNDRV_PCM_IOCTL_DELAY, &delay);
1474 if (err == -EPIPE)
1475 delay = 0; /* hack for broken OSS applications */
1476 else if (err < 0)
1477 return err;
1478 return snd_pcm_oss_bytes(substream, delay);
1479}
1480
1481static int snd_pcm_oss_get_ptr(snd_pcm_oss_file_t *pcm_oss_file, int stream, struct count_info __user * _info)
1482{
1483 snd_pcm_substream_t *substream;
1484 snd_pcm_runtime_t *runtime;
1485 snd_pcm_sframes_t delay;
1486 int fixup;
1487 struct count_info info;
1488 int err;
1489
1490 if (_info == NULL)
1491 return -EFAULT;
1492 substream = pcm_oss_file->streams[stream];
1493 if (substream == NULL)
1494 return -EINVAL;
1495 if ((err = snd_pcm_oss_make_ready(substream)) < 0)
1496 return err;
1497 runtime = substream->runtime;
1498 if (runtime->oss.params || runtime->oss.prepare) {
1499 memset(&info, 0, sizeof(info));
1500 if (copy_to_user(_info, &info, sizeof(info)))
1501 return -EFAULT;
1502 return 0;
1503 }
1504 if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
1505 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DELAY, &delay);
1506 if (err == -EPIPE || err == -ESTRPIPE || (! err && delay < 0)) {
1507 err = 0;
1508 delay = 0;
1509 fixup = 0;
1510 } else {
1511 fixup = runtime->oss.buffer_used;
1512 }
1513 } else {
1514 err = snd_pcm_oss_capture_position_fixup(substream, &delay);
1515 fixup = -runtime->oss.buffer_used;
1516 }
1517 if (err < 0)
1518 return err;
1519 info.ptr = snd_pcm_oss_bytes(substream, runtime->status->hw_ptr % runtime->buffer_size);
1520 if (atomic_read(&runtime->mmap_count)) {
1521 snd_pcm_sframes_t n;
1522 n = (delay = runtime->hw_ptr_interrupt) - runtime->oss.prev_hw_ptr_interrupt;
1523 if (n < 0)
1524 n += runtime->boundary;
1525 info.blocks = n / runtime->period_size;
1526 runtime->oss.prev_hw_ptr_interrupt = delay;
1527 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
1528 snd_pcm_oss_simulate_fill(substream, delay);
1529 info.bytes = snd_pcm_oss_bytes(substream, runtime->status->hw_ptr) & INT_MAX;
1530 } else {
1531 delay = snd_pcm_oss_bytes(substream, delay) + fixup;
1532 info.blocks = delay / runtime->oss.period_bytes;
1533 if (stream == SNDRV_PCM_STREAM_PLAYBACK)
1534 info.bytes = (runtime->oss.bytes - delay) & INT_MAX;
1535 else
1536 info.bytes = (runtime->oss.bytes + delay) & INT_MAX;
1537 }
1538 if (copy_to_user(_info, &info, sizeof(info)))
1539 return -EFAULT;
1540 return 0;
1541}
1542
1543static int snd_pcm_oss_get_space(snd_pcm_oss_file_t *pcm_oss_file, int stream, struct audio_buf_info __user *_info)
1544{
1545 snd_pcm_substream_t *substream;
1546 snd_pcm_runtime_t *runtime;
1547 snd_pcm_sframes_t avail;
1548 int fixup;
1549 struct audio_buf_info info;
1550 int err;
1551
1552 if (_info == NULL)
1553 return -EFAULT;
1554 substream = pcm_oss_file->streams[stream];
1555 if (substream == NULL)
1556 return -EINVAL;
1557 runtime = substream->runtime;
1558
1559 if (runtime->oss.params &&
1560 (err = snd_pcm_oss_change_params(substream)) < 0)
1561 return err;
1562
1563 info.fragsize = runtime->oss.period_bytes;
1564 info.fragstotal = runtime->periods;
1565 if (runtime->oss.prepare) {
1566 if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
1567 info.bytes = runtime->oss.period_bytes * runtime->oss.periods;
1568 info.fragments = runtime->oss.periods;
1569 } else {
1570 info.bytes = 0;
1571 info.fragments = 0;
1572 }
1573 } else {
1574 if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
1575 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DELAY, &avail);
1576 if (err == -EPIPE || err == -ESTRPIPE || (! err && avail < 0)) {
1577 avail = runtime->buffer_size;
1578 err = 0;
1579 fixup = 0;
1580 } else {
1581 avail = runtime->buffer_size - avail;
1582 fixup = -runtime->oss.buffer_used;
1583 }
1584 } else {
1585 err = snd_pcm_oss_capture_position_fixup(substream, &avail);
1586 fixup = runtime->oss.buffer_used;
1587 }
1588 if (err < 0)
1589 return err;
1590 info.bytes = snd_pcm_oss_bytes(substream, avail) + fixup;
1591 info.fragments = info.bytes / runtime->oss.period_bytes;
1592 }
1593
1594#ifdef OSS_DEBUG
1595 printk("pcm_oss: space: bytes = %i, fragments = %i, fragstotal = %i, fragsize = %i\n", info.bytes, info.fragments, info.fragstotal, info.fragsize);
1596#endif
1597 if (copy_to_user(_info, &info, sizeof(info)))
1598 return -EFAULT;
1599 return 0;
1600}
1601
1602static int snd_pcm_oss_get_mapbuf(snd_pcm_oss_file_t *pcm_oss_file, int stream, struct buffmem_desc __user * _info)
1603{
1604 // it won't be probably implemented
1605 // snd_printd("TODO: snd_pcm_oss_get_mapbuf\n");
1606 return -EINVAL;
1607}
1608
1609static snd_pcm_oss_setup_t *snd_pcm_oss_look_for_setup(snd_pcm_t *pcm, int stream, const char *task_name)
1610{
1611 const char *ptr, *ptrl;
1612 snd_pcm_oss_setup_t *setup;
1613
1614 down(&pcm->streams[stream].oss.setup_mutex);
1615 for (setup = pcm->streams[stream].oss.setup_list; setup; setup = setup->next) {
1616 if (!strcmp(setup->task_name, task_name)) {
1617 up(&pcm->streams[stream].oss.setup_mutex);
1618 return setup;
1619 }
1620 }
1621 ptr = ptrl = task_name;
1622 while (*ptr) {
1623 if (*ptr == '/')
1624 ptrl = ptr + 1;
1625 ptr++;
1626 }
1627 if (ptrl == task_name) {
1628 goto __not_found;
1629 return NULL;
1630 }
1631 for (setup = pcm->streams[stream].oss.setup_list; setup; setup = setup->next) {
1632 if (!strcmp(setup->task_name, ptrl)) {
1633 up(&pcm->streams[stream].oss.setup_mutex);
1634 return setup;
1635 }
1636 }
1637 __not_found:
1638 up(&pcm->streams[stream].oss.setup_mutex);
1639 return NULL;
1640}
1641
1642static void snd_pcm_oss_init_substream(snd_pcm_substream_t *substream,
1643 snd_pcm_oss_setup_t *setup,
1644 int minor)
1645{
1646 snd_pcm_runtime_t *runtime;
1647
1648 substream->oss.oss = 1;
1649 substream->oss.setup = setup;
1650 runtime = substream->runtime;
1651 runtime->oss.params = 1;
1652 runtime->oss.trigger = 1;
1653 runtime->oss.rate = 8000;
1654 switch (SNDRV_MINOR_OSS_DEVICE(minor)) {
1655 case SNDRV_MINOR_OSS_PCM_8:
1656 runtime->oss.format = AFMT_U8;
1657 break;
1658 case SNDRV_MINOR_OSS_PCM_16:
1659 runtime->oss.format = AFMT_S16_LE;
1660 break;
1661 default:
1662 runtime->oss.format = AFMT_MU_LAW;
1663 }
1664 runtime->oss.channels = 1;
1665 runtime->oss.fragshift = 0;
1666 runtime->oss.maxfrags = 0;
1667 runtime->oss.subdivision = 0;
1668}
1669
1670static void snd_pcm_oss_release_substream(snd_pcm_substream_t *substream)
1671{
1672 snd_pcm_runtime_t *runtime;
1673 runtime = substream->runtime;
1674 vfree(runtime->oss.buffer);
1675 snd_pcm_oss_plugin_clear(substream);
1676 substream->oss.file = NULL;
1677 substream->oss.oss = 0;
1678}
1679
1680static int snd_pcm_oss_release_file(snd_pcm_oss_file_t *pcm_oss_file)
1681{
1682 int cidx;
1683 snd_assert(pcm_oss_file != NULL, return -ENXIO);
1684 for (cidx = 0; cidx < 2; ++cidx) {
1685 snd_pcm_substream_t *substream = pcm_oss_file->streams[cidx];
1686 snd_pcm_runtime_t *runtime;
1687 if (substream == NULL)
1688 continue;
1689 runtime = substream->runtime;
1690
1691 snd_pcm_stream_lock_irq(substream);
1692 if (snd_pcm_running(substream))
1693 snd_pcm_stop(substream, SNDRV_PCM_STATE_SETUP);
1694 snd_pcm_stream_unlock_irq(substream);
1695 if (substream->open_flag) {
1696 if (substream->ops->hw_free != NULL)
1697 substream->ops->hw_free(substream);
1698 substream->ops->close(substream);
1699 substream->open_flag = 0;
1700 }
1701 substream->ffile = NULL;
1702 snd_pcm_oss_release_substream(substream);
1703 snd_pcm_release_substream(substream);
1704 }
1705 kfree(pcm_oss_file);
1706 return 0;
1707}
1708
1709static int snd_pcm_oss_open_file(struct file *file,
1710 snd_pcm_t *pcm,
1711 snd_pcm_oss_file_t **rpcm_oss_file,
1712 int minor,
1713 snd_pcm_oss_setup_t *psetup,
1714 snd_pcm_oss_setup_t *csetup)
1715{
1716 int err = 0;
1717 snd_pcm_oss_file_t *pcm_oss_file;
1718 snd_pcm_substream_t *psubstream = NULL, *csubstream = NULL;
1719 unsigned int f_mode = file->f_mode;
1720
1721 snd_assert(rpcm_oss_file != NULL, return -EINVAL);
1722 *rpcm_oss_file = NULL;
1723
1724 pcm_oss_file = kcalloc(1, sizeof(*pcm_oss_file), GFP_KERNEL);
1725 if (pcm_oss_file == NULL)
1726 return -ENOMEM;
1727
1728 if ((f_mode & (FMODE_WRITE|FMODE_READ)) == (FMODE_WRITE|FMODE_READ) &&
1729 (pcm->info_flags & SNDRV_PCM_INFO_HALF_DUPLEX))
1730 f_mode = FMODE_WRITE;
1731 if ((f_mode & FMODE_WRITE) && !(psetup && psetup->disable)) {
1732 if ((err = snd_pcm_open_substream(pcm, SNDRV_PCM_STREAM_PLAYBACK,
1733 &psubstream)) < 0) {
1734 snd_pcm_oss_release_file(pcm_oss_file);
1735 return err;
1736 }
1737 pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK] = psubstream;
1738 }
1739 if ((f_mode & FMODE_READ) && !(csetup && csetup->disable)) {
1740 if ((err = snd_pcm_open_substream(pcm, SNDRV_PCM_STREAM_CAPTURE,
1741 &csubstream)) < 0) {
1742 if (!(f_mode & FMODE_WRITE) || err != -ENODEV) {
1743 snd_pcm_oss_release_file(pcm_oss_file);
1744 return err;
1745 } else {
1746 csubstream = NULL;
1747 }
1748 }
1749 pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE] = csubstream;
1750 }
1751
1752 if (psubstream == NULL && csubstream == NULL) {
1753 snd_pcm_oss_release_file(pcm_oss_file);
1754 return -EINVAL;
1755 }
1756 if (psubstream != NULL) {
1757 psubstream->oss.file = pcm_oss_file;
1758 err = snd_pcm_hw_constraints_init(psubstream);
1759 if (err < 0) {
1760 snd_printd("snd_pcm_hw_constraint_init failed\n");
1761 snd_pcm_oss_release_file(pcm_oss_file);
1762 return err;
1763 }
1764 if ((err = psubstream->ops->open(psubstream)) < 0) {
1765 snd_pcm_oss_release_file(pcm_oss_file);
1766 return err;
1767 }
1768 psubstream->open_flag = 1;
1769 err = snd_pcm_hw_constraints_complete(psubstream);
1770 if (err < 0) {
1771 snd_printd("snd_pcm_hw_constraint_complete failed\n");
1772 snd_pcm_oss_release_file(pcm_oss_file);
1773 return err;
1774 }
1775 psubstream->ffile = file;
1776 snd_pcm_oss_init_substream(psubstream, psetup, minor);
1777 }
1778 if (csubstream != NULL) {
1779 csubstream->oss.file = pcm_oss_file;
1780 err = snd_pcm_hw_constraints_init(csubstream);
1781 if (err < 0) {
1782 snd_printd("snd_pcm_hw_constraint_init failed\n");
1783 snd_pcm_oss_release_file(pcm_oss_file);
1784 return err;
1785 }
1786 if ((err = csubstream->ops->open(csubstream)) < 0) {
1787 snd_pcm_oss_release_file(pcm_oss_file);
1788 return err;
1789 }
1790 csubstream->open_flag = 1;
1791 err = snd_pcm_hw_constraints_complete(csubstream);
1792 if (err < 0) {
1793 snd_printd("snd_pcm_hw_constraint_complete failed\n");
1794 snd_pcm_oss_release_file(pcm_oss_file);
1795 return err;
1796 }
1797 csubstream->ffile = file;
1798 snd_pcm_oss_init_substream(csubstream, csetup, minor);
1799 }
1800
1801 file->private_data = pcm_oss_file;
1802 *rpcm_oss_file = pcm_oss_file;
1803 return 0;
1804}
1805
1806
1807static int snd_pcm_oss_open(struct inode *inode, struct file *file)
1808{
1809 int minor = iminor(inode);
1810 int cardnum = SNDRV_MINOR_OSS_CARD(minor);
1811 int device;
1812 int err;
1813 char task_name[32];
1814 snd_pcm_t *pcm;
1815 snd_pcm_oss_file_t *pcm_oss_file;
1816 snd_pcm_oss_setup_t *psetup = NULL, *csetup = NULL;
1817 int nonblock;
1818 wait_queue_t wait;
1819
1820 snd_assert(cardnum >= 0 && cardnum < SNDRV_CARDS, return -ENXIO);
1821 device = SNDRV_MINOR_OSS_DEVICE(minor) == SNDRV_MINOR_OSS_PCM1 ?
1822 adsp_map[cardnum] : dsp_map[cardnum];
1823
1824 pcm = snd_pcm_devices[(cardnum * SNDRV_PCM_DEVICES) + device];
1825 if (pcm == NULL) {
1826 err = -ENODEV;
1827 goto __error1;
1828 }
1829 err = snd_card_file_add(pcm->card, file);
1830 if (err < 0)
1831 goto __error1;
1832 if (!try_module_get(pcm->card->module)) {
1833 err = -EFAULT;
1834 goto __error2;
1835 }
1836 if (snd_task_name(current, task_name, sizeof(task_name)) < 0) {
1837 err = -EFAULT;
1838 goto __error;
1839 }
1840 if (file->f_mode & FMODE_WRITE)
1841 psetup = snd_pcm_oss_look_for_setup(pcm, SNDRV_PCM_STREAM_PLAYBACK, task_name);
1842 if (file->f_mode & FMODE_READ)
1843 csetup = snd_pcm_oss_look_for_setup(pcm, SNDRV_PCM_STREAM_CAPTURE, task_name);
1844
1845 nonblock = !!(file->f_flags & O_NONBLOCK);
1846 if (psetup && !psetup->disable) {
1847 if (psetup->nonblock)
1848 nonblock = 1;
1849 else if (psetup->block)
1850 nonblock = 0;
1851 } else if (csetup && !csetup->disable) {
1852 if (csetup->nonblock)
1853 nonblock = 1;
1854 else if (csetup->block)
1855 nonblock = 0;
1856 }
1857 if (!nonblock)
1858 nonblock = nonblock_open;
1859
1860 init_waitqueue_entry(&wait, current);
1861 add_wait_queue(&pcm->open_wait, &wait);
1862 down(&pcm->open_mutex);
1863 while (1) {
1864 err = snd_pcm_oss_open_file(file, pcm, &pcm_oss_file,
1865 minor, psetup, csetup);
1866 if (err >= 0)
1867 break;
1868 if (err == -EAGAIN) {
1869 if (nonblock) {
1870 err = -EBUSY;
1871 break;
1872 }
1873 } else
1874 break;
1875 set_current_state(TASK_INTERRUPTIBLE);
1876 up(&pcm->open_mutex);
1877 schedule();
1878 down(&pcm->open_mutex);
1879 if (signal_pending(current)) {
1880 err = -ERESTARTSYS;
1881 break;
1882 }
1883 }
1884 remove_wait_queue(&pcm->open_wait, &wait);
1885 up(&pcm->open_mutex);
1886 if (err < 0)
1887 goto __error;
1888 return err;
1889
1890 __error:
1891 module_put(pcm->card->module);
1892 __error2:
1893 snd_card_file_remove(pcm->card, file);
1894 __error1:
1895 return err;
1896}
1897
1898static int snd_pcm_oss_release(struct inode *inode, struct file *file)
1899{
1900 snd_pcm_t *pcm;
1901 snd_pcm_substream_t *substream;
1902 snd_pcm_oss_file_t *pcm_oss_file;
1903
1904 pcm_oss_file = file->private_data;
1905 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
1906 if (substream == NULL)
1907 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
1908 snd_assert(substream != NULL, return -ENXIO);
1909 pcm = substream->pcm;
1910 snd_pcm_oss_sync(pcm_oss_file);
1911 down(&pcm->open_mutex);
1912 snd_pcm_oss_release_file(pcm_oss_file);
1913 up(&pcm->open_mutex);
1914 wake_up(&pcm->open_wait);
1915 module_put(pcm->card->module);
1916 snd_card_file_remove(pcm->card, file);
1917 return 0;
1918}
1919
1920static long snd_pcm_oss_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
1921{
1922 snd_pcm_oss_file_t *pcm_oss_file;
1923 int __user *p = (int __user *)arg;
1924 int res;
1925
1926 pcm_oss_file = file->private_data;
1927 if (cmd == OSS_GETVERSION)
1928 return put_user(SNDRV_OSS_VERSION, p);
1929 if (cmd == OSS_ALSAEMULVER)
1930 return put_user(1, p);
1931#if defined(CONFIG_SND_MIXER_OSS) || (defined(MODULE) && defined(CONFIG_SND_MIXER_OSS_MODULE))
1932 if (((cmd >> 8) & 0xff) == 'M') { /* mixer ioctl - for OSS compatibility */
1933 snd_pcm_substream_t *substream;
1934 int idx;
1935 for (idx = 0; idx < 2; ++idx) {
1936 substream = pcm_oss_file->streams[idx];
1937 if (substream != NULL)
1938 break;
1939 }
1940 snd_assert(substream != NULL, return -ENXIO);
1941 return snd_mixer_oss_ioctl_card(substream->pcm->card, cmd, arg);
1942 }
1943#endif
1944 if (((cmd >> 8) & 0xff) != 'P')
1945 return -EINVAL;
1946#ifdef OSS_DEBUG
1947 printk("pcm_oss: ioctl = 0x%x\n", cmd);
1948#endif
1949 switch (cmd) {
1950 case SNDCTL_DSP_RESET:
1951 return snd_pcm_oss_reset(pcm_oss_file);
1952 case SNDCTL_DSP_SYNC:
1953 return snd_pcm_oss_sync(pcm_oss_file);
1954 case SNDCTL_DSP_SPEED:
1955 if (get_user(res, p))
1956 return -EFAULT;
1957 if ((res = snd_pcm_oss_set_rate(pcm_oss_file, res))<0)
1958 return res;
1959 return put_user(res, p);
1960 case SOUND_PCM_READ_RATE:
1961 res = snd_pcm_oss_get_rate(pcm_oss_file);
1962 if (res < 0)
1963 return res;
1964 return put_user(res, p);
1965 case SNDCTL_DSP_STEREO:
1966 if (get_user(res, p))
1967 return -EFAULT;
1968 res = res > 0 ? 2 : 1;
1969 if ((res = snd_pcm_oss_set_channels(pcm_oss_file, res)) < 0)
1970 return res;
1971 return put_user(--res, p);
1972 case SNDCTL_DSP_GETBLKSIZE:
1973 res = snd_pcm_oss_get_block_size(pcm_oss_file);
1974 if (res < 0)
1975 return res;
1976 return put_user(res, p);
1977 case SNDCTL_DSP_SETFMT:
1978 if (get_user(res, p))
1979 return -EFAULT;
1980 res = snd_pcm_oss_set_format(pcm_oss_file, res);
1981 if (res < 0)
1982 return res;
1983 return put_user(res, p);
1984 case SOUND_PCM_READ_BITS:
1985 res = snd_pcm_oss_get_format(pcm_oss_file);
1986 if (res < 0)
1987 return res;
1988 return put_user(res, p);
1989 case SNDCTL_DSP_CHANNELS:
1990 if (get_user(res, p))
1991 return -EFAULT;
1992 res = snd_pcm_oss_set_channels(pcm_oss_file, res);
1993 if (res < 0)
1994 return res;
1995 return put_user(res, p);
1996 case SOUND_PCM_READ_CHANNELS:
1997 res = snd_pcm_oss_get_channels(pcm_oss_file);
1998 if (res < 0)
1999 return res;
2000 return put_user(res, p);
2001 case SOUND_PCM_WRITE_FILTER:
2002 case SOUND_PCM_READ_FILTER:
2003 return -EIO;
2004 case SNDCTL_DSP_POST:
2005 return snd_pcm_oss_post(pcm_oss_file);
2006 case SNDCTL_DSP_SUBDIVIDE:
2007 if (get_user(res, p))
2008 return -EFAULT;
2009 res = snd_pcm_oss_set_subdivide(pcm_oss_file, res);
2010 if (res < 0)
2011 return res;
2012 return put_user(res, p);
2013 case SNDCTL_DSP_SETFRAGMENT:
2014 if (get_user(res, p))
2015 return -EFAULT;
2016 return snd_pcm_oss_set_fragment(pcm_oss_file, res);
2017 case SNDCTL_DSP_GETFMTS:
2018 res = snd_pcm_oss_get_formats(pcm_oss_file);
2019 if (res < 0)
2020 return res;
2021 return put_user(res, p);
2022 case SNDCTL_DSP_GETOSPACE:
2023 case SNDCTL_DSP_GETISPACE:
2024 return snd_pcm_oss_get_space(pcm_oss_file,
2025 cmd == SNDCTL_DSP_GETISPACE ?
2026 SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK,
2027 (struct audio_buf_info __user *) arg);
2028 case SNDCTL_DSP_NONBLOCK:
2029 return snd_pcm_oss_nonblock(file);
2030 case SNDCTL_DSP_GETCAPS:
2031 res = snd_pcm_oss_get_caps(pcm_oss_file);
2032 if (res < 0)
2033 return res;
2034 return put_user(res, p);
2035 case SNDCTL_DSP_GETTRIGGER:
2036 res = snd_pcm_oss_get_trigger(pcm_oss_file);
2037 if (res < 0)
2038 return res;
2039 return put_user(res, p);
2040 case SNDCTL_DSP_SETTRIGGER:
2041 if (get_user(res, p))
2042 return -EFAULT;
2043 return snd_pcm_oss_set_trigger(pcm_oss_file, res);
2044 case SNDCTL_DSP_GETIPTR:
2045 case SNDCTL_DSP_GETOPTR:
2046 return snd_pcm_oss_get_ptr(pcm_oss_file,
2047 cmd == SNDCTL_DSP_GETIPTR ?
2048 SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK,
2049 (struct count_info __user *) arg);
2050 case SNDCTL_DSP_MAPINBUF:
2051 case SNDCTL_DSP_MAPOUTBUF:
2052 return snd_pcm_oss_get_mapbuf(pcm_oss_file,
2053 cmd == SNDCTL_DSP_MAPINBUF ?
2054 SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK,
2055 (struct buffmem_desc __user *) arg);
2056 case SNDCTL_DSP_SETSYNCRO:
2057 /* stop DMA now.. */
2058 return 0;
2059 case SNDCTL_DSP_SETDUPLEX:
2060 if (snd_pcm_oss_get_caps(pcm_oss_file) & DSP_CAP_DUPLEX)
2061 return 0;
2062 return -EIO;
2063 case SNDCTL_DSP_GETODELAY:
2064 res = snd_pcm_oss_get_odelay(pcm_oss_file);
2065 if (res < 0) {
2066 /* it's for sure, some broken apps don't check for error codes */
2067 put_user(0, p);
2068 return res;
2069 }
2070 return put_user(res, p);
2071 case SNDCTL_DSP_PROFILE:
2072 return 0; /* silently ignore */
2073 default:
2074 snd_printd("pcm_oss: unknown command = 0x%x\n", cmd);
2075 }
2076 return -EINVAL;
2077}
2078
2079#ifdef CONFIG_COMPAT
2080/* all compatible */
2081#define snd_pcm_oss_ioctl_compat snd_pcm_oss_ioctl
2082#else
2083#define snd_pcm_oss_ioctl_compat NULL
2084#endif
2085
2086static ssize_t snd_pcm_oss_read(struct file *file, char __user *buf, size_t count, loff_t *offset)
2087{
2088 snd_pcm_oss_file_t *pcm_oss_file;
2089 snd_pcm_substream_t *substream;
2090
2091 pcm_oss_file = file->private_data;
2092 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
2093 if (substream == NULL)
2094 return -ENXIO;
2095#ifndef OSS_DEBUG
2096 return snd_pcm_oss_read1(substream, buf, count);
2097#else
2098 {
2099 ssize_t res = snd_pcm_oss_read1(substream, buf, count);
2100 printk("pcm_oss: read %li bytes (returned %li bytes)\n", (long)count, (long)res);
2101 return res;
2102 }
2103#endif
2104}
2105
2106static ssize_t snd_pcm_oss_write(struct file *file, const char __user *buf, size_t count, loff_t *offset)
2107{
2108 snd_pcm_oss_file_t *pcm_oss_file;
2109 snd_pcm_substream_t *substream;
2110 long result;
2111
2112 pcm_oss_file = file->private_data;
2113 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
2114 if (substream == NULL)
2115 return -ENXIO;
2116 up(&file->f_dentry->d_inode->i_sem);
2117 result = snd_pcm_oss_write1(substream, buf, count);
2118 down(&file->f_dentry->d_inode->i_sem);
2119#ifdef OSS_DEBUG
2120 printk("pcm_oss: write %li bytes (wrote %li bytes)\n", (long)count, (long)result);
2121#endif
2122 return result;
2123}
2124
2125static int snd_pcm_oss_playback_ready(snd_pcm_substream_t *substream)
2126{
2127 snd_pcm_runtime_t *runtime = substream->runtime;
2128 if (atomic_read(&runtime->mmap_count))
2129 return runtime->oss.prev_hw_ptr_interrupt != runtime->hw_ptr_interrupt;
2130 else
2131 return snd_pcm_playback_avail(runtime) >= runtime->oss.period_frames;
2132}
2133
2134static int snd_pcm_oss_capture_ready(snd_pcm_substream_t *substream)
2135{
2136 snd_pcm_runtime_t *runtime = substream->runtime;
2137 if (atomic_read(&runtime->mmap_count))
2138 return runtime->oss.prev_hw_ptr_interrupt != runtime->hw_ptr_interrupt;
2139 else
2140 return snd_pcm_capture_avail(runtime) >= runtime->oss.period_frames;
2141}
2142
2143static unsigned int snd_pcm_oss_poll(struct file *file, poll_table * wait)
2144{
2145 snd_pcm_oss_file_t *pcm_oss_file;
2146 unsigned int mask;
2147 snd_pcm_substream_t *psubstream = NULL, *csubstream = NULL;
2148
2149 pcm_oss_file = file->private_data;
2150
2151 psubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
2152 csubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
2153
2154 mask = 0;
2155 if (psubstream != NULL) {
2156 snd_pcm_runtime_t *runtime = psubstream->runtime;
2157 poll_wait(file, &runtime->sleep, wait);
2158 snd_pcm_stream_lock_irq(psubstream);
2159 if (runtime->status->state != SNDRV_PCM_STATE_DRAINING &&
2160 (runtime->status->state != SNDRV_PCM_STATE_RUNNING ||
2161 snd_pcm_oss_playback_ready(psubstream)))
2162 mask |= POLLOUT | POLLWRNORM;
2163 snd_pcm_stream_unlock_irq(psubstream);
2164 }
2165 if (csubstream != NULL) {
2166 snd_pcm_runtime_t *runtime = csubstream->runtime;
2167 enum sndrv_pcm_state ostate;
2168 poll_wait(file, &runtime->sleep, wait);
2169 snd_pcm_stream_lock_irq(csubstream);
2170 if ((ostate = runtime->status->state) != SNDRV_PCM_STATE_RUNNING ||
2171 snd_pcm_oss_capture_ready(csubstream))
2172 mask |= POLLIN | POLLRDNORM;
2173 snd_pcm_stream_unlock_irq(csubstream);
2174 if (ostate != SNDRV_PCM_STATE_RUNNING && runtime->oss.trigger) {
2175 snd_pcm_oss_file_t ofile;
2176 memset(&ofile, 0, sizeof(ofile));
2177 ofile.streams[SNDRV_PCM_STREAM_CAPTURE] = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
2178 runtime->oss.trigger = 0;
2179 snd_pcm_oss_set_trigger(&ofile, PCM_ENABLE_INPUT);
2180 }
2181 }
2182
2183 return mask;
2184}
2185
2186static int snd_pcm_oss_mmap(struct file *file, struct vm_area_struct *area)
2187{
2188 snd_pcm_oss_file_t *pcm_oss_file;
2189 snd_pcm_substream_t *substream = NULL;
2190 snd_pcm_runtime_t *runtime;
2191 int err;
2192
2193#ifdef OSS_DEBUG
2194 printk("pcm_oss: mmap begin\n");
2195#endif
2196 pcm_oss_file = file->private_data;
2197 switch ((area->vm_flags & (VM_READ | VM_WRITE))) {
2198 case VM_READ | VM_WRITE:
2199 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
2200 if (substream)
2201 break;
2202 /* Fall through */
2203 case VM_READ:
2204 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
2205 break;
2206 case VM_WRITE:
2207 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
2208 break;
2209 default:
2210 return -EINVAL;
2211 }
2212 /* set VM_READ access as well to fix memset() routines that do
2213 reads before writes (to improve performance) */
2214 area->vm_flags |= VM_READ;
2215 if (substream == NULL)
2216 return -ENXIO;
2217 runtime = substream->runtime;
2218 if (!(runtime->info & SNDRV_PCM_INFO_MMAP_VALID))
2219 return -EIO;
2220 if (runtime->info & SNDRV_PCM_INFO_INTERLEAVED)
2221 runtime->access = SNDRV_PCM_ACCESS_MMAP_INTERLEAVED;
2222 else
2223 return -EIO;
2224
2225 if (runtime->oss.params) {
2226 if ((err = snd_pcm_oss_change_params(substream)) < 0)
2227 return err;
2228 }
2229 if (runtime->oss.plugin_first != NULL)
2230 return -EIO;
2231
2232 if (area->vm_pgoff != 0)
2233 return -EINVAL;
2234
2235 err = snd_pcm_mmap_data(substream, file, area);
2236 if (err < 0)
2237 return err;
2238 runtime->oss.mmap_bytes = area->vm_end - area->vm_start;
2239 runtime->silence_threshold = 0;
2240 runtime->silence_size = 0;
2241#ifdef OSS_DEBUG
2242 printk("pcm_oss: mmap ok, bytes = 0x%x\n", runtime->oss.mmap_bytes);
2243#endif
2244 /* In mmap mode we never stop */
2245 runtime->stop_threshold = runtime->boundary;
2246
2247 return 0;
2248}
2249
2250/*
2251 * /proc interface
2252 */
2253
2254static void snd_pcm_oss_proc_read(snd_info_entry_t *entry,
2255 snd_info_buffer_t * buffer)
2256{
2257 snd_pcm_str_t *pstr = (snd_pcm_str_t *)entry->private_data;
2258 snd_pcm_oss_setup_t *setup = pstr->oss.setup_list;
2259 down(&pstr->oss.setup_mutex);
2260 while (setup) {
2261 snd_iprintf(buffer, "%s %u %u%s%s%s%s%s%s\n",
2262 setup->task_name,
2263 setup->periods,
2264 setup->period_size,
2265 setup->disable ? " disable" : "",
2266 setup->direct ? " direct" : "",
2267 setup->block ? " block" : "",
2268 setup->nonblock ? " non-block" : "",
2269 setup->partialfrag ? " partial-frag" : "",
2270 setup->nosilence ? " no-silence" : "");
2271 setup = setup->next;
2272 }
2273 up(&pstr->oss.setup_mutex);
2274}
2275
2276static void snd_pcm_oss_proc_free_setup_list(snd_pcm_str_t * pstr)
2277{
2278 unsigned int idx;
2279 snd_pcm_substream_t *substream;
2280 snd_pcm_oss_setup_t *setup, *setupn;
2281
2282 for (idx = 0, substream = pstr->substream;
2283 idx < pstr->substream_count; idx++, substream = substream->next)
2284 substream->oss.setup = NULL;
2285 for (setup = pstr->oss.setup_list, pstr->oss.setup_list = NULL;
2286 setup; setup = setupn) {
2287 setupn = setup->next;
2288 kfree(setup->task_name);
2289 kfree(setup);
2290 }
2291 pstr->oss.setup_list = NULL;
2292}
2293
2294static void snd_pcm_oss_proc_write(snd_info_entry_t *entry,
2295 snd_info_buffer_t * buffer)
2296{
2297 snd_pcm_str_t *pstr = (snd_pcm_str_t *)entry->private_data;
2298 char line[128], str[32], task_name[32], *ptr;
2299 int idx1;
2300 snd_pcm_oss_setup_t *setup, *setup1, template;
2301
2302 while (!snd_info_get_line(buffer, line, sizeof(line))) {
2303 down(&pstr->oss.setup_mutex);
2304 memset(&template, 0, sizeof(template));
2305 ptr = snd_info_get_str(task_name, line, sizeof(task_name));
2306 if (!strcmp(task_name, "clear") || !strcmp(task_name, "erase")) {
2307 snd_pcm_oss_proc_free_setup_list(pstr);
2308 up(&pstr->oss.setup_mutex);
2309 continue;
2310 }
2311 for (setup = pstr->oss.setup_list; setup; setup = setup->next) {
2312 if (!strcmp(setup->task_name, task_name)) {
2313 template = *setup;
2314 break;
2315 }
2316 }
2317 ptr = snd_info_get_str(str, ptr, sizeof(str));
2318 template.periods = simple_strtoul(str, NULL, 10);
2319 ptr = snd_info_get_str(str, ptr, sizeof(str));
2320 template.period_size = simple_strtoul(str, NULL, 10);
2321 for (idx1 = 31; idx1 >= 0; idx1--)
2322 if (template.period_size & (1 << idx1))
2323 break;
2324 for (idx1--; idx1 >= 0; idx1--)
2325 template.period_size &= ~(1 << idx1);
2326 do {
2327 ptr = snd_info_get_str(str, ptr, sizeof(str));
2328 if (!strcmp(str, "disable")) {
2329 template.disable = 1;
2330 } else if (!strcmp(str, "direct")) {
2331 template.direct = 1;
2332 } else if (!strcmp(str, "block")) {
2333 template.block = 1;
2334 } else if (!strcmp(str, "non-block")) {
2335 template.nonblock = 1;
2336 } else if (!strcmp(str, "partial-frag")) {
2337 template.partialfrag = 1;
2338 } else if (!strcmp(str, "no-silence")) {
2339 template.nosilence = 1;
2340 }
2341 } while (*str);
2342 if (setup == NULL) {
2343 setup = (snd_pcm_oss_setup_t *) kmalloc(sizeof(snd_pcm_oss_setup_t), GFP_KERNEL);
2344 if (setup) {
2345 if (pstr->oss.setup_list == NULL) {
2346 pstr->oss.setup_list = setup;
2347 } else {
2348 for (setup1 = pstr->oss.setup_list; setup1->next; setup1 = setup1->next);
2349 setup1->next = setup;
2350 }
2351 template.task_name = snd_kmalloc_strdup(task_name, GFP_KERNEL);
2352 } else {
2353 buffer->error = -ENOMEM;
2354 }
2355 }
2356 if (setup)
2357 *setup = template;
2358 up(&pstr->oss.setup_mutex);
2359 }
2360}
2361
2362static void snd_pcm_oss_proc_init(snd_pcm_t *pcm)
2363{
2364 int stream;
2365 for (stream = 0; stream < 2; ++stream) {
2366 snd_info_entry_t *entry;
2367 snd_pcm_str_t *pstr = &pcm->streams[stream];
2368 if (pstr->substream_count == 0)
2369 continue;
2370 if ((entry = snd_info_create_card_entry(pcm->card, "oss", pstr->proc_root)) != NULL) {
2371 entry->content = SNDRV_INFO_CONTENT_TEXT;
2372 entry->mode = S_IFREG | S_IRUGO | S_IWUSR;
2373 entry->c.text.read_size = 8192;
2374 entry->c.text.read = snd_pcm_oss_proc_read;
2375 entry->c.text.write_size = 8192;
2376 entry->c.text.write = snd_pcm_oss_proc_write;
2377 entry->private_data = pstr;
2378 if (snd_info_register(entry) < 0) {
2379 snd_info_free_entry(entry);
2380 entry = NULL;
2381 }
2382 }
2383 pstr->oss.proc_entry = entry;
2384 }
2385}
2386
2387static void snd_pcm_oss_proc_done(snd_pcm_t *pcm)
2388{
2389 int stream;
2390 for (stream = 0; stream < 2; ++stream) {
2391 snd_pcm_str_t *pstr = &pcm->streams[stream];
2392 if (pstr->oss.proc_entry) {
2393 snd_info_unregister(pstr->oss.proc_entry);
2394 pstr->oss.proc_entry = NULL;
2395 snd_pcm_oss_proc_free_setup_list(pstr);
2396 }
2397 }
2398}
2399
2400/*
2401 * ENTRY functions
2402 */
2403
2404static struct file_operations snd_pcm_oss_f_reg =
2405{
2406 .owner = THIS_MODULE,
2407 .read = snd_pcm_oss_read,
2408 .write = snd_pcm_oss_write,
2409 .open = snd_pcm_oss_open,
2410 .release = snd_pcm_oss_release,
2411 .poll = snd_pcm_oss_poll,
2412 .unlocked_ioctl = snd_pcm_oss_ioctl,
2413 .compat_ioctl = snd_pcm_oss_ioctl_compat,
2414 .mmap = snd_pcm_oss_mmap,
2415};
2416
2417static snd_minor_t snd_pcm_oss_reg =
2418{
2419 .comment = "digital audio",
2420 .f_ops = &snd_pcm_oss_f_reg,
2421};
2422
2423static void register_oss_dsp(snd_pcm_t *pcm, int index)
2424{
2425 char name[128];
2426 sprintf(name, "dsp%i%i", pcm->card->number, pcm->device);
2427 if (snd_register_oss_device(SNDRV_OSS_DEVICE_TYPE_PCM,
2428 pcm->card, index, &snd_pcm_oss_reg,
2429 name) < 0) {
2430 snd_printk("unable to register OSS PCM device %i:%i\n", pcm->card->number, pcm->device);
2431 }
2432}
2433
2434static int snd_pcm_oss_register_minor(snd_pcm_t * pcm)
2435{
2436 pcm->oss.reg = 0;
2437 if (dsp_map[pcm->card->number] == (int)pcm->device) {
2438 char name[128];
2439 int duplex;
2440 register_oss_dsp(pcm, 0);
2441 duplex = (pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream_count > 0 &&
2442 pcm->streams[SNDRV_PCM_STREAM_CAPTURE].substream_count &&
2443 !(pcm->info_flags & SNDRV_PCM_INFO_HALF_DUPLEX));
2444 sprintf(name, "%s%s", pcm->name, duplex ? " (DUPLEX)" : "");
2445#ifdef SNDRV_OSS_INFO_DEV_AUDIO
2446 snd_oss_info_register(SNDRV_OSS_INFO_DEV_AUDIO,
2447 pcm->card->number,
2448 name);
2449#endif
2450 pcm->oss.reg++;
2451 pcm->oss.reg_mask |= 1;
2452 }
2453 if (adsp_map[pcm->card->number] == (int)pcm->device) {
2454 register_oss_dsp(pcm, 1);
2455 pcm->oss.reg++;
2456 pcm->oss.reg_mask |= 2;
2457 }
2458
2459 if (pcm->oss.reg)
2460 snd_pcm_oss_proc_init(pcm);
2461
2462 return 0;
2463}
2464
2465static int snd_pcm_oss_disconnect_minor(snd_pcm_t * pcm)
2466{
2467 if (pcm->oss.reg) {
2468 if (pcm->oss.reg_mask & 1) {
2469 pcm->oss.reg_mask &= ~1;
2470 snd_unregister_oss_device(SNDRV_OSS_DEVICE_TYPE_PCM,
2471 pcm->card, 0);
2472 }
2473 if (pcm->oss.reg_mask & 2) {
2474 pcm->oss.reg_mask &= ~2;
2475 snd_unregister_oss_device(SNDRV_OSS_DEVICE_TYPE_PCM,
2476 pcm->card, 1);
2477 }
2478 }
2479 return 0;
2480}
2481
2482static int snd_pcm_oss_unregister_minor(snd_pcm_t * pcm)
2483{
2484 snd_pcm_oss_disconnect_minor(pcm);
2485 if (pcm->oss.reg) {
2486 if (dsp_map[pcm->card->number] == (int)pcm->device) {
2487#ifdef SNDRV_OSS_INFO_DEV_AUDIO
2488 snd_oss_info_unregister(SNDRV_OSS_INFO_DEV_AUDIO, pcm->card->number);
2489#endif
2490 }
2491 pcm->oss.reg = 0;
2492 snd_pcm_oss_proc_done(pcm);
2493 }
2494 return 0;
2495}
2496
2497static snd_pcm_notify_t snd_pcm_oss_notify =
2498{
2499 .n_register = snd_pcm_oss_register_minor,
2500 .n_disconnect = snd_pcm_oss_disconnect_minor,
2501 .n_unregister = snd_pcm_oss_unregister_minor,
2502};
2503
2504static int __init alsa_pcm_oss_init(void)
2505{
2506 int i;
2507 int err;
2508
2509 /* check device map table */
2510 for (i = 0; i < SNDRV_CARDS; i++) {
2511 if (dsp_map[i] < 0 || dsp_map[i] >= SNDRV_PCM_DEVICES) {
2512 snd_printk("invalid dsp_map[%d] = %d\n", i, dsp_map[i]);
2513 dsp_map[i] = 0;
2514 }
2515 if (adsp_map[i] < 0 || adsp_map[i] >= SNDRV_PCM_DEVICES) {
2516 snd_printk("invalid adsp_map[%d] = %d\n", i, adsp_map[i]);
2517 adsp_map[i] = 1;
2518 }
2519 }
2520 if ((err = snd_pcm_notify(&snd_pcm_oss_notify, 0)) < 0)
2521 return err;
2522 return 0;
2523}
2524
2525static void __exit alsa_pcm_oss_exit(void)
2526{
2527 snd_pcm_notify(&snd_pcm_oss_notify, 1);
2528}
2529
2530module_init(alsa_pcm_oss_init)
2531module_exit(alsa_pcm_oss_exit)
kernel source for telekom puls (alcatel/mediatek)