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[ALSA] semaphore -> mutex (core part)
[GitHub/mt8127/android_kernel_alcatel_ttab.git] / sound / core / oss / pcm_oss.c
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 <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>
45
46 #define OSS_ALSAEMULVER _SIOR ('M', 249, int)
47
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;
51
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);
63
64 extern int snd_mixer_oss_ioctl_card(struct snd_card *card, unsigned int cmd, unsigned long arg);
65 static int snd_pcm_oss_get_rate(struct snd_pcm_oss_file *pcm_oss_file);
66 static int snd_pcm_oss_get_channels(struct snd_pcm_oss_file *pcm_oss_file);
67 static int snd_pcm_oss_get_format(struct snd_pcm_oss_file *pcm_oss_file);
68
69 static inline mm_segment_t snd_enter_user(void)
70 {
71 mm_segment_t fs = get_fs();
72 set_fs(get_ds());
73 return fs;
74 }
75
76 static inline void snd_leave_user(mm_segment_t fs)
77 {
78 set_fs(fs);
79 }
80
81 #ifdef CONFIG_SND_PCM_OSS_PLUGINS
82 static int snd_pcm_oss_plugin_clear(struct snd_pcm_substream *substream)
83 {
84 struct snd_pcm_runtime *runtime = substream->runtime;
85 struct snd_pcm_plugin *plugin, *next;
86
87 plugin = runtime->oss.plugin_first;
88 while (plugin) {
89 next = plugin->next;
90 snd_pcm_plugin_free(plugin);
91 plugin = next;
92 }
93 runtime->oss.plugin_first = runtime->oss.plugin_last = NULL;
94 return 0;
95 }
96
97 static int snd_pcm_plugin_insert(struct snd_pcm_plugin *plugin)
98 {
99 struct snd_pcm_runtime *runtime = plugin->plug->runtime;
100 plugin->next = runtime->oss.plugin_first;
101 plugin->prev = NULL;
102 if (runtime->oss.plugin_first) {
103 runtime->oss.plugin_first->prev = plugin;
104 runtime->oss.plugin_first = plugin;
105 } else {
106 runtime->oss.plugin_last =
107 runtime->oss.plugin_first = plugin;
108 }
109 return 0;
110 }
111
112 int snd_pcm_plugin_append(struct snd_pcm_plugin *plugin)
113 {
114 struct snd_pcm_runtime *runtime = plugin->plug->runtime;
115 plugin->next = NULL;
116 plugin->prev = runtime->oss.plugin_last;
117 if (runtime->oss.plugin_last) {
118 runtime->oss.plugin_last->next = plugin;
119 runtime->oss.plugin_last = plugin;
120 } else {
121 runtime->oss.plugin_last =
122 runtime->oss.plugin_first = plugin;
123 }
124 return 0;
125 }
126 #endif /* CONFIG_SND_PCM_OSS_PLUGINS */
127
128 static long snd_pcm_oss_bytes(struct snd_pcm_substream *substream, long frames)
129 {
130 struct snd_pcm_runtime *runtime = substream->runtime;
131 long buffer_size = snd_pcm_lib_buffer_bytes(substream);
132 long bytes = frames_to_bytes(runtime, frames);
133 if (buffer_size == runtime->oss.buffer_bytes)
134 return bytes;
135 #if BITS_PER_LONG >= 64
136 return runtime->oss.buffer_bytes * bytes / buffer_size;
137 #else
138 {
139 u64 bsize = (u64)runtime->oss.buffer_bytes * (u64)bytes;
140 u32 rem;
141 div64_32(&bsize, buffer_size, &rem);
142 return (long)bsize;
143 }
144 #endif
145 }
146
147 static long snd_pcm_alsa_frames(struct snd_pcm_substream *substream, long bytes)
148 {
149 struct snd_pcm_runtime *runtime = substream->runtime;
150 long buffer_size = snd_pcm_lib_buffer_bytes(substream);
151 if (buffer_size == runtime->oss.buffer_bytes)
152 return bytes_to_frames(runtime, bytes);
153 return bytes_to_frames(runtime, (buffer_size * bytes) / runtime->oss.buffer_bytes);
154 }
155
156 static int snd_pcm_oss_format_from(int format)
157 {
158 switch (format) {
159 case AFMT_MU_LAW: return SNDRV_PCM_FORMAT_MU_LAW;
160 case AFMT_A_LAW: return SNDRV_PCM_FORMAT_A_LAW;
161 case AFMT_IMA_ADPCM: return SNDRV_PCM_FORMAT_IMA_ADPCM;
162 case AFMT_U8: return SNDRV_PCM_FORMAT_U8;
163 case AFMT_S16_LE: return SNDRV_PCM_FORMAT_S16_LE;
164 case AFMT_S16_BE: return SNDRV_PCM_FORMAT_S16_BE;
165 case AFMT_S8: return SNDRV_PCM_FORMAT_S8;
166 case AFMT_U16_LE: return SNDRV_PCM_FORMAT_U16_LE;
167 case AFMT_U16_BE: return SNDRV_PCM_FORMAT_U16_BE;
168 case AFMT_MPEG: return SNDRV_PCM_FORMAT_MPEG;
169 default: return SNDRV_PCM_FORMAT_U8;
170 }
171 }
172
173 static int snd_pcm_oss_format_to(int format)
174 {
175 switch (format) {
176 case SNDRV_PCM_FORMAT_MU_LAW: return AFMT_MU_LAW;
177 case SNDRV_PCM_FORMAT_A_LAW: return AFMT_A_LAW;
178 case SNDRV_PCM_FORMAT_IMA_ADPCM: return AFMT_IMA_ADPCM;
179 case SNDRV_PCM_FORMAT_U8: return AFMT_U8;
180 case SNDRV_PCM_FORMAT_S16_LE: return AFMT_S16_LE;
181 case SNDRV_PCM_FORMAT_S16_BE: return AFMT_S16_BE;
182 case SNDRV_PCM_FORMAT_S8: return AFMT_S8;
183 case SNDRV_PCM_FORMAT_U16_LE: return AFMT_U16_LE;
184 case SNDRV_PCM_FORMAT_U16_BE: return AFMT_U16_BE;
185 case SNDRV_PCM_FORMAT_MPEG: return AFMT_MPEG;
186 default: return -EINVAL;
187 }
188 }
189
190 static int snd_pcm_oss_period_size(struct snd_pcm_substream *substream,
191 struct snd_pcm_hw_params *oss_params,
192 struct snd_pcm_hw_params *slave_params)
193 {
194 size_t s;
195 size_t oss_buffer_size, oss_period_size, oss_periods;
196 size_t min_period_size, max_period_size;
197 struct snd_pcm_runtime *runtime = substream->runtime;
198 size_t oss_frame_size;
199
200 oss_frame_size = snd_pcm_format_physical_width(params_format(oss_params)) *
201 params_channels(oss_params) / 8;
202
203 oss_buffer_size = snd_pcm_plug_client_size(substream,
204 snd_pcm_hw_param_value_max(slave_params, SNDRV_PCM_HW_PARAM_BUFFER_SIZE, NULL)) * oss_frame_size;
205 oss_buffer_size = 1 << ld2(oss_buffer_size);
206 if (atomic_read(&runtime->mmap_count)) {
207 if (oss_buffer_size > runtime->oss.mmap_bytes)
208 oss_buffer_size = runtime->oss.mmap_bytes;
209 }
210
211 if (substream->oss.setup &&
212 substream->oss.setup->period_size > 16)
213 oss_period_size = substream->oss.setup->period_size;
214 else if (runtime->oss.fragshift) {
215 oss_period_size = 1 << runtime->oss.fragshift;
216 if (oss_period_size > oss_buffer_size / 2)
217 oss_period_size = oss_buffer_size / 2;
218 } else {
219 int sd;
220 size_t bytes_per_sec = params_rate(oss_params) * snd_pcm_format_physical_width(params_format(oss_params)) * params_channels(oss_params) / 8;
221
222 oss_period_size = oss_buffer_size;
223 do {
224 oss_period_size /= 2;
225 } while (oss_period_size > bytes_per_sec);
226 if (runtime->oss.subdivision == 0) {
227 sd = 4;
228 if (oss_period_size / sd > 4096)
229 sd *= 2;
230 if (oss_period_size / sd < 4096)
231 sd = 1;
232 } else
233 sd = runtime->oss.subdivision;
234 oss_period_size /= sd;
235 if (oss_period_size < 16)
236 oss_period_size = 16;
237 }
238
239 min_period_size = snd_pcm_plug_client_size(substream,
240 snd_pcm_hw_param_value_min(slave_params, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, NULL));
241 min_period_size *= oss_frame_size;
242 min_period_size = 1 << (ld2(min_period_size - 1) + 1);
243 if (oss_period_size < min_period_size)
244 oss_period_size = min_period_size;
245
246 max_period_size = snd_pcm_plug_client_size(substream,
247 snd_pcm_hw_param_value_max(slave_params, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, NULL));
248 max_period_size *= oss_frame_size;
249 max_period_size = 1 << ld2(max_period_size);
250 if (oss_period_size > max_period_size)
251 oss_period_size = max_period_size;
252
253 oss_periods = oss_buffer_size / oss_period_size;
254
255 if (substream->oss.setup) {
256 if (substream->oss.setup->periods > 1)
257 oss_periods = substream->oss.setup->periods;
258 }
259
260 s = snd_pcm_hw_param_value_max(slave_params, SNDRV_PCM_HW_PARAM_PERIODS, NULL);
261 if (runtime->oss.maxfrags && s > runtime->oss.maxfrags)
262 s = runtime->oss.maxfrags;
263 if (oss_periods > s)
264 oss_periods = s;
265
266 s = snd_pcm_hw_param_value_min(slave_params, SNDRV_PCM_HW_PARAM_PERIODS, NULL);
267 if (s < 2)
268 s = 2;
269 if (oss_periods < s)
270 oss_periods = s;
271
272 while (oss_period_size * oss_periods > oss_buffer_size)
273 oss_period_size /= 2;
274
275 snd_assert(oss_period_size >= 16, return -EINVAL);
276 runtime->oss.period_bytes = oss_period_size;
277 runtime->oss.period_frames = 1;
278 runtime->oss.periods = oss_periods;
279 return 0;
280 }
281
282 static int choose_rate(struct snd_pcm_substream *substream,
283 struct snd_pcm_hw_params *params, unsigned int best_rate)
284 {
285 struct snd_interval *it;
286 struct snd_pcm_hw_params *save;
287 unsigned int rate, prev;
288
289 save = kmalloc(sizeof(*save), GFP_KERNEL);
290 if (save == NULL)
291 return -ENOMEM;
292 *save = *params;
293 it = hw_param_interval(save, SNDRV_PCM_HW_PARAM_RATE);
294
295 /* try multiples of the best rate */
296 rate = best_rate;
297 for (;;) {
298 if (it->max < rate || (it->max == rate && it->openmax))
299 break;
300 if (it->min < rate || (it->min == rate && !it->openmin)) {
301 int ret;
302 ret = snd_pcm_hw_param_set(substream, params,
303 SNDRV_PCM_HW_PARAM_RATE,
304 rate, 0);
305 if (ret == (int)rate) {
306 kfree(save);
307 return rate;
308 }
309 *params = *save;
310 }
311 prev = rate;
312 rate += best_rate;
313 if (rate <= prev)
314 break;
315 }
316
317 /* not found, use the nearest rate */
318 kfree(save);
319 return snd_pcm_hw_param_near(substream, params, SNDRV_PCM_HW_PARAM_RATE, best_rate, NULL);
320 }
321
322 static int snd_pcm_oss_change_params(struct snd_pcm_substream *substream)
323 {
324 struct snd_pcm_runtime *runtime = substream->runtime;
325 struct snd_pcm_hw_params *params, *sparams;
326 struct snd_pcm_sw_params *sw_params;
327 ssize_t oss_buffer_size, oss_period_size;
328 size_t oss_frame_size;
329 int err;
330 int direct;
331 int format, sformat, n;
332 struct snd_mask sformat_mask;
333 struct snd_mask mask;
334
335 sw_params = kmalloc(sizeof(*sw_params), GFP_KERNEL);
336 params = kmalloc(sizeof(*params), GFP_KERNEL);
337 sparams = kmalloc(sizeof(*sparams), GFP_KERNEL);
338 if (!sw_params || !params || !sparams) {
339 snd_printd("No memory\n");
340 err = -ENOMEM;
341 goto failure;
342 }
343
344 if (atomic_read(&runtime->mmap_count)) {
345 direct = 1;
346 } else {
347 struct snd_pcm_oss_setup *setup = substream->oss.setup;
348 direct = (setup != NULL && setup->direct);
349 }
350
351 _snd_pcm_hw_params_any(sparams);
352 _snd_pcm_hw_param_setinteger(sparams, SNDRV_PCM_HW_PARAM_PERIODS);
353 _snd_pcm_hw_param_min(sparams, SNDRV_PCM_HW_PARAM_PERIODS, 2, 0);
354 snd_mask_none(&mask);
355 if (atomic_read(&runtime->mmap_count))
356 snd_mask_set(&mask, SNDRV_PCM_ACCESS_MMAP_INTERLEAVED);
357 else {
358 snd_mask_set(&mask, SNDRV_PCM_ACCESS_RW_INTERLEAVED);
359 if (!direct)
360 snd_mask_set(&mask, SNDRV_PCM_ACCESS_RW_NONINTERLEAVED);
361 }
362 err = snd_pcm_hw_param_mask(substream, sparams, SNDRV_PCM_HW_PARAM_ACCESS, &mask);
363 if (err < 0) {
364 snd_printd("No usable accesses\n");
365 err = -EINVAL;
366 goto failure;
367 }
368 choose_rate(substream, sparams, runtime->oss.rate);
369 snd_pcm_hw_param_near(substream, sparams, SNDRV_PCM_HW_PARAM_CHANNELS, runtime->oss.channels, NULL);
370
371 format = snd_pcm_oss_format_from(runtime->oss.format);
372
373 sformat_mask = *hw_param_mask(sparams, SNDRV_PCM_HW_PARAM_FORMAT);
374 if (direct)
375 sformat = format;
376 else
377 sformat = snd_pcm_plug_slave_format(format, &sformat_mask);
378
379 if (sformat < 0 || !snd_mask_test(&sformat_mask, sformat)) {
380 for (sformat = 0; sformat <= SNDRV_PCM_FORMAT_LAST; sformat++) {
381 if (snd_mask_test(&sformat_mask, sformat) &&
382 snd_pcm_oss_format_to(sformat) >= 0)
383 break;
384 }
385 if (sformat > SNDRV_PCM_FORMAT_LAST) {
386 snd_printd("Cannot find a format!!!\n");
387 err = -EINVAL;
388 goto failure;
389 }
390 }
391 err = _snd_pcm_hw_param_set(sparams, SNDRV_PCM_HW_PARAM_FORMAT, sformat, 0);
392 snd_assert(err >= 0, goto failure);
393
394 if (direct) {
395 memcpy(params, sparams, sizeof(*params));
396 } else {
397 _snd_pcm_hw_params_any(params);
398 _snd_pcm_hw_param_set(params, SNDRV_PCM_HW_PARAM_ACCESS,
399 SNDRV_PCM_ACCESS_RW_INTERLEAVED, 0);
400 _snd_pcm_hw_param_set(params, SNDRV_PCM_HW_PARAM_FORMAT,
401 snd_pcm_oss_format_from(runtime->oss.format), 0);
402 _snd_pcm_hw_param_set(params, SNDRV_PCM_HW_PARAM_CHANNELS,
403 runtime->oss.channels, 0);
404 _snd_pcm_hw_param_set(params, SNDRV_PCM_HW_PARAM_RATE,
405 runtime->oss.rate, 0);
406 pdprintf("client: access = %i, format = %i, channels = %i, rate = %i\n",
407 params_access(params), params_format(params),
408 params_channels(params), params_rate(params));
409 }
410 pdprintf("slave: access = %i, format = %i, channels = %i, rate = %i\n",
411 params_access(sparams), params_format(sparams),
412 params_channels(sparams), params_rate(sparams));
413
414 oss_frame_size = snd_pcm_format_physical_width(params_format(params)) *
415 params_channels(params) / 8;
416
417 #ifdef CONFIG_SND_PCM_OSS_PLUGINS
418 snd_pcm_oss_plugin_clear(substream);
419 if (!direct) {
420 /* add necessary plugins */
421 snd_pcm_oss_plugin_clear(substream);
422 if ((err = snd_pcm_plug_format_plugins(substream,
423 params,
424 sparams)) < 0) {
425 snd_printd("snd_pcm_plug_format_plugins failed: %i\n", err);
426 snd_pcm_oss_plugin_clear(substream);
427 goto failure;
428 }
429 if (runtime->oss.plugin_first) {
430 struct snd_pcm_plugin *plugin;
431 if ((err = snd_pcm_plugin_build_io(substream, sparams, &plugin)) < 0) {
432 snd_printd("snd_pcm_plugin_build_io failed: %i\n", err);
433 snd_pcm_oss_plugin_clear(substream);
434 goto failure;
435 }
436 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
437 err = snd_pcm_plugin_append(plugin);
438 } else {
439 err = snd_pcm_plugin_insert(plugin);
440 }
441 if (err < 0) {
442 snd_pcm_oss_plugin_clear(substream);
443 goto failure;
444 }
445 }
446 }
447 #endif
448
449 err = snd_pcm_oss_period_size(substream, params, sparams);
450 if (err < 0)
451 goto failure;
452
453 n = snd_pcm_plug_slave_size(substream, runtime->oss.period_bytes / oss_frame_size);
454 err = snd_pcm_hw_param_near(substream, sparams, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, n, NULL);
455 snd_assert(err >= 0, goto failure);
456
457 err = snd_pcm_hw_param_near(substream, sparams, SNDRV_PCM_HW_PARAM_PERIODS,
458 runtime->oss.periods, NULL);
459 snd_assert(err >= 0, goto failure);
460
461 snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DROP, NULL);
462
463 if ((err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_HW_PARAMS, sparams)) < 0) {
464 snd_printd("HW_PARAMS failed: %i\n", err);
465 goto failure;
466 }
467
468 memset(sw_params, 0, sizeof(*sw_params));
469 if (runtime->oss.trigger) {
470 sw_params->start_threshold = 1;
471 } else {
472 sw_params->start_threshold = runtime->boundary;
473 }
474 if (atomic_read(&runtime->mmap_count) || substream->stream == SNDRV_PCM_STREAM_CAPTURE)
475 sw_params->stop_threshold = runtime->boundary;
476 else
477 sw_params->stop_threshold = runtime->buffer_size;
478 sw_params->tstamp_mode = SNDRV_PCM_TSTAMP_NONE;
479 sw_params->period_step = 1;
480 sw_params->sleep_min = 0;
481 sw_params->avail_min = substream->stream == SNDRV_PCM_STREAM_PLAYBACK ?
482 1 : runtime->period_size;
483 sw_params->xfer_align = 1;
484 if (atomic_read(&runtime->mmap_count) ||
485 (substream->oss.setup && substream->oss.setup->nosilence)) {
486 sw_params->silence_threshold = 0;
487 sw_params->silence_size = 0;
488 } else {
489 snd_pcm_uframes_t frames;
490 frames = runtime->period_size + 16;
491 if (frames > runtime->buffer_size)
492 frames = runtime->buffer_size;
493 sw_params->silence_threshold = frames;
494 sw_params->silence_size = frames;
495 }
496
497 if ((err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_SW_PARAMS, sw_params)) < 0) {
498 snd_printd("SW_PARAMS failed: %i\n", err);
499 goto failure;
500 }
501
502 runtime->oss.periods = params_periods(sparams);
503 oss_period_size = snd_pcm_plug_client_size(substream, params_period_size(sparams));
504 snd_assert(oss_period_size >= 0, err = -EINVAL; goto failure);
505 #ifdef CONFIG_SND_PCM_OSS_PLUGINS
506 if (runtime->oss.plugin_first) {
507 err = snd_pcm_plug_alloc(substream, oss_period_size);
508 if (err < 0)
509 goto failure;
510 }
511 #endif
512 oss_period_size *= oss_frame_size;
513
514 oss_buffer_size = oss_period_size * runtime->oss.periods;
515 snd_assert(oss_buffer_size >= 0, err = -EINVAL; goto failure);
516
517 runtime->oss.period_bytes = oss_period_size;
518 runtime->oss.buffer_bytes = oss_buffer_size;
519
520 pdprintf("oss: period bytes = %i, buffer bytes = %i\n",
521 runtime->oss.period_bytes,
522 runtime->oss.buffer_bytes);
523 pdprintf("slave: period_size = %i, buffer_size = %i\n",
524 params_period_size(sparams),
525 params_buffer_size(sparams));
526
527 runtime->oss.format = snd_pcm_oss_format_to(params_format(params));
528 runtime->oss.channels = params_channels(params);
529 runtime->oss.rate = params_rate(params);
530
531 runtime->oss.params = 0;
532 runtime->oss.prepare = 1;
533 vfree(runtime->oss.buffer);
534 runtime->oss.buffer = vmalloc(runtime->oss.period_bytes);
535 runtime->oss.buffer_used = 0;
536 if (runtime->dma_area)
537 snd_pcm_format_set_silence(runtime->format, runtime->dma_area, bytes_to_samples(runtime, runtime->dma_bytes));
538
539 runtime->oss.period_frames = snd_pcm_alsa_frames(substream, oss_period_size);
540
541 err = 0;
542 failure:
543 kfree(sw_params);
544 kfree(params);
545 kfree(sparams);
546 return err;
547 }
548
549 static int snd_pcm_oss_get_active_substream(struct snd_pcm_oss_file *pcm_oss_file, struct snd_pcm_substream **r_substream)
550 {
551 int idx, err;
552 struct snd_pcm_substream *asubstream = NULL, *substream;
553
554 for (idx = 0; idx < 2; idx++) {
555 substream = pcm_oss_file->streams[idx];
556 if (substream == NULL)
557 continue;
558 if (asubstream == NULL)
559 asubstream = substream;
560 if (substream->runtime->oss.params) {
561 err = snd_pcm_oss_change_params(substream);
562 if (err < 0)
563 return err;
564 }
565 }
566 snd_assert(asubstream != NULL, return -EIO);
567 if (r_substream)
568 *r_substream = asubstream;
569 return 0;
570 }
571
572 static int snd_pcm_oss_prepare(struct snd_pcm_substream *substream)
573 {
574 int err;
575 struct snd_pcm_runtime *runtime = substream->runtime;
576
577 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_PREPARE, NULL);
578 if (err < 0) {
579 snd_printd("snd_pcm_oss_prepare: SNDRV_PCM_IOCTL_PREPARE failed\n");
580 return err;
581 }
582 runtime->oss.prepare = 0;
583 runtime->oss.prev_hw_ptr_interrupt = 0;
584 runtime->oss.period_ptr = 0;
585 runtime->oss.buffer_used = 0;
586
587 return 0;
588 }
589
590 static int snd_pcm_oss_make_ready(struct snd_pcm_substream *substream)
591 {
592 struct snd_pcm_runtime *runtime;
593 int err;
594
595 if (substream == NULL)
596 return 0;
597 runtime = substream->runtime;
598 if (runtime->oss.params) {
599 err = snd_pcm_oss_change_params(substream);
600 if (err < 0)
601 return err;
602 }
603 if (runtime->oss.prepare) {
604 err = snd_pcm_oss_prepare(substream);
605 if (err < 0)
606 return err;
607 }
608 return 0;
609 }
610
611 static int snd_pcm_oss_capture_position_fixup(struct snd_pcm_substream *substream, snd_pcm_sframes_t *delay)
612 {
613 struct snd_pcm_runtime *runtime;
614 snd_pcm_uframes_t frames;
615 int err = 0;
616
617 while (1) {
618 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DELAY, delay);
619 if (err < 0)
620 break;
621 runtime = substream->runtime;
622 if (*delay <= (snd_pcm_sframes_t)runtime->buffer_size)
623 break;
624 /* in case of overrun, skip whole periods like OSS/Linux driver does */
625 /* until avail(delay) <= buffer_size */
626 frames = (*delay - runtime->buffer_size) + runtime->period_size - 1;
627 frames /= runtime->period_size;
628 frames *= runtime->period_size;
629 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_FORWARD, &frames);
630 if (err < 0)
631 break;
632 }
633 return err;
634 }
635
636 snd_pcm_sframes_t snd_pcm_oss_write3(struct snd_pcm_substream *substream, const char *ptr, snd_pcm_uframes_t frames, int in_kernel)
637 {
638 struct snd_pcm_runtime *runtime = substream->runtime;
639 int ret;
640 while (1) {
641 if (runtime->status->state == SNDRV_PCM_STATE_XRUN ||
642 runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) {
643 #ifdef OSS_DEBUG
644 if (runtime->status->state == SNDRV_PCM_STATE_XRUN)
645 printk("pcm_oss: write: recovering from XRUN\n");
646 else
647 printk("pcm_oss: write: recovering from SUSPEND\n");
648 #endif
649 ret = snd_pcm_oss_prepare(substream);
650 if (ret < 0)
651 break;
652 }
653 if (in_kernel) {
654 mm_segment_t fs;
655 fs = snd_enter_user();
656 ret = snd_pcm_lib_write(substream, (void __user *)ptr, frames);
657 snd_leave_user(fs);
658 } else {
659 ret = snd_pcm_lib_write(substream, (void __user *)ptr, frames);
660 }
661 if (ret != -EPIPE && ret != -ESTRPIPE)
662 break;
663 /* test, if we can't store new data, because the stream */
664 /* has not been started */
665 if (runtime->status->state == SNDRV_PCM_STATE_PREPARED)
666 return -EAGAIN;
667 }
668 return ret;
669 }
670
671 snd_pcm_sframes_t snd_pcm_oss_read3(struct snd_pcm_substream *substream, char *ptr, snd_pcm_uframes_t frames, int in_kernel)
672 {
673 struct snd_pcm_runtime *runtime = substream->runtime;
674 snd_pcm_sframes_t delay;
675 int ret;
676 while (1) {
677 if (runtime->status->state == SNDRV_PCM_STATE_XRUN ||
678 runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) {
679 #ifdef OSS_DEBUG
680 if (runtime->status->state == SNDRV_PCM_STATE_XRUN)
681 printk("pcm_oss: read: recovering from XRUN\n");
682 else
683 printk("pcm_oss: read: recovering from SUSPEND\n");
684 #endif
685 ret = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DRAIN, NULL);
686 if (ret < 0)
687 break;
688 } else if (runtime->status->state == SNDRV_PCM_STATE_SETUP) {
689 ret = snd_pcm_oss_prepare(substream);
690 if (ret < 0)
691 break;
692 }
693 ret = snd_pcm_oss_capture_position_fixup(substream, &delay);
694 if (ret < 0)
695 break;
696 if (in_kernel) {
697 mm_segment_t fs;
698 fs = snd_enter_user();
699 ret = snd_pcm_lib_read(substream, (void __user *)ptr, frames);
700 snd_leave_user(fs);
701 } else {
702 ret = snd_pcm_lib_read(substream, (void __user *)ptr, frames);
703 }
704 if (ret == -EPIPE) {
705 if (runtime->status->state == SNDRV_PCM_STATE_DRAINING) {
706 ret = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DROP, NULL);
707 if (ret < 0)
708 break;
709 }
710 continue;
711 }
712 if (ret != -ESTRPIPE)
713 break;
714 }
715 return ret;
716 }
717
718 snd_pcm_sframes_t snd_pcm_oss_writev3(struct snd_pcm_substream *substream, void **bufs, snd_pcm_uframes_t frames, int in_kernel)
719 {
720 struct snd_pcm_runtime *runtime = substream->runtime;
721 int ret;
722 while (1) {
723 if (runtime->status->state == SNDRV_PCM_STATE_XRUN ||
724 runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) {
725 #ifdef OSS_DEBUG
726 if (runtime->status->state == SNDRV_PCM_STATE_XRUN)
727 printk("pcm_oss: writev: recovering from XRUN\n");
728 else
729 printk("pcm_oss: writev: recovering from SUSPEND\n");
730 #endif
731 ret = snd_pcm_oss_prepare(substream);
732 if (ret < 0)
733 break;
734 }
735 if (in_kernel) {
736 mm_segment_t fs;
737 fs = snd_enter_user();
738 ret = snd_pcm_lib_writev(substream, (void __user **)bufs, frames);
739 snd_leave_user(fs);
740 } else {
741 ret = snd_pcm_lib_writev(substream, (void __user **)bufs, frames);
742 }
743 if (ret != -EPIPE && ret != -ESTRPIPE)
744 break;
745
746 /* test, if we can't store new data, because the stream */
747 /* has not been started */
748 if (runtime->status->state == SNDRV_PCM_STATE_PREPARED)
749 return -EAGAIN;
750 }
751 return ret;
752 }
753
754 snd_pcm_sframes_t snd_pcm_oss_readv3(struct snd_pcm_substream *substream, void **bufs, snd_pcm_uframes_t frames, int in_kernel)
755 {
756 struct snd_pcm_runtime *runtime = substream->runtime;
757 int ret;
758 while (1) {
759 if (runtime->status->state == SNDRV_PCM_STATE_XRUN ||
760 runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) {
761 #ifdef OSS_DEBUG
762 if (runtime->status->state == SNDRV_PCM_STATE_XRUN)
763 printk("pcm_oss: readv: recovering from XRUN\n");
764 else
765 printk("pcm_oss: readv: recovering from SUSPEND\n");
766 #endif
767 ret = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DRAIN, NULL);
768 if (ret < 0)
769 break;
770 } else if (runtime->status->state == SNDRV_PCM_STATE_SETUP) {
771 ret = snd_pcm_oss_prepare(substream);
772 if (ret < 0)
773 break;
774 }
775 if (in_kernel) {
776 mm_segment_t fs;
777 fs = snd_enter_user();
778 ret = snd_pcm_lib_readv(substream, (void __user **)bufs, frames);
779 snd_leave_user(fs);
780 } else {
781 ret = snd_pcm_lib_readv(substream, (void __user **)bufs, frames);
782 }
783 if (ret != -EPIPE && ret != -ESTRPIPE)
784 break;
785 }
786 return ret;
787 }
788
789 static ssize_t snd_pcm_oss_write2(struct snd_pcm_substream *substream, const char *buf, size_t bytes, int in_kernel)
790 {
791 struct snd_pcm_runtime *runtime = substream->runtime;
792 snd_pcm_sframes_t frames, frames1;
793 #ifdef CONFIG_SND_PCM_OSS_PLUGINS
794 if (runtime->oss.plugin_first) {
795 struct snd_pcm_plugin_channel *channels;
796 size_t oss_frame_bytes = (runtime->oss.plugin_first->src_width * runtime->oss.plugin_first->src_format.channels) / 8;
797 if (!in_kernel) {
798 if (copy_from_user(runtime->oss.buffer, (const char __user *)buf, bytes))
799 return -EFAULT;
800 buf = runtime->oss.buffer;
801 }
802 frames = bytes / oss_frame_bytes;
803 frames1 = snd_pcm_plug_client_channels_buf(substream, (char *)buf, frames, &channels);
804 if (frames1 < 0)
805 return frames1;
806 frames1 = snd_pcm_plug_write_transfer(substream, channels, frames1);
807 if (frames1 <= 0)
808 return frames1;
809 bytes = frames1 * oss_frame_bytes;
810 } else
811 #endif
812 {
813 frames = bytes_to_frames(runtime, bytes);
814 frames1 = snd_pcm_oss_write3(substream, buf, frames, in_kernel);
815 if (frames1 <= 0)
816 return frames1;
817 bytes = frames_to_bytes(runtime, frames1);
818 }
819 return bytes;
820 }
821
822 static ssize_t snd_pcm_oss_write1(struct snd_pcm_substream *substream, const char __user *buf, size_t bytes)
823 {
824 size_t xfer = 0;
825 ssize_t tmp;
826 struct snd_pcm_runtime *runtime = substream->runtime;
827
828 if (atomic_read(&runtime->mmap_count))
829 return -ENXIO;
830
831 if ((tmp = snd_pcm_oss_make_ready(substream)) < 0)
832 return tmp;
833 while (bytes > 0) {
834 if (bytes < runtime->oss.period_bytes || runtime->oss.buffer_used > 0) {
835 tmp = bytes;
836 if (tmp + runtime->oss.buffer_used > runtime->oss.period_bytes)
837 tmp = runtime->oss.period_bytes - runtime->oss.buffer_used;
838 if (tmp > 0) {
839 if (copy_from_user(runtime->oss.buffer + runtime->oss.buffer_used, buf, tmp))
840 return xfer > 0 ? (snd_pcm_sframes_t)xfer : -EFAULT;
841 }
842 runtime->oss.buffer_used += tmp;
843 buf += tmp;
844 bytes -= tmp;
845 xfer += tmp;
846 if ((substream->oss.setup != NULL && substream->oss.setup->partialfrag) ||
847 runtime->oss.buffer_used == runtime->oss.period_bytes) {
848 tmp = snd_pcm_oss_write2(substream, runtime->oss.buffer + runtime->oss.period_ptr,
849 runtime->oss.buffer_used - runtime->oss.period_ptr, 1);
850 if (tmp <= 0)
851 return xfer > 0 ? (snd_pcm_sframes_t)xfer : tmp;
852 runtime->oss.bytes += tmp;
853 runtime->oss.period_ptr += tmp;
854 runtime->oss.period_ptr %= runtime->oss.period_bytes;
855 if (runtime->oss.period_ptr == 0 ||
856 runtime->oss.period_ptr == runtime->oss.buffer_used)
857 runtime->oss.buffer_used = 0;
858 else if ((substream->ffile->f_flags & O_NONBLOCK) != 0)
859 return xfer > 0 ? xfer : -EAGAIN;
860 }
861 } else {
862 tmp = snd_pcm_oss_write2(substream,
863 (const char __force *)buf,
864 runtime->oss.period_bytes, 0);
865 if (tmp <= 0)
866 return xfer > 0 ? (snd_pcm_sframes_t)xfer : tmp;
867 runtime->oss.bytes += tmp;
868 buf += tmp;
869 bytes -= tmp;
870 xfer += tmp;
871 if ((substream->ffile->f_flags & O_NONBLOCK) != 0 &&
872 tmp != runtime->oss.period_bytes)
873 break;
874 }
875 }
876 return xfer;
877 }
878
879 static ssize_t snd_pcm_oss_read2(struct snd_pcm_substream *substream, char *buf, size_t bytes, int in_kernel)
880 {
881 struct snd_pcm_runtime *runtime = substream->runtime;
882 snd_pcm_sframes_t frames, frames1;
883 #ifdef CONFIG_SND_PCM_OSS_PLUGINS
884 char __user *final_dst = (char __user *)buf;
885 if (runtime->oss.plugin_first) {
886 struct snd_pcm_plugin_channel *channels;
887 size_t oss_frame_bytes = (runtime->oss.plugin_last->dst_width * runtime->oss.plugin_last->dst_format.channels) / 8;
888 if (!in_kernel)
889 buf = runtime->oss.buffer;
890 frames = bytes / oss_frame_bytes;
891 frames1 = snd_pcm_plug_client_channels_buf(substream, buf, frames, &channels);
892 if (frames1 < 0)
893 return frames1;
894 frames1 = snd_pcm_plug_read_transfer(substream, channels, frames1);
895 if (frames1 <= 0)
896 return frames1;
897 bytes = frames1 * oss_frame_bytes;
898 if (!in_kernel && copy_to_user(final_dst, buf, bytes))
899 return -EFAULT;
900 } else
901 #endif
902 {
903 frames = bytes_to_frames(runtime, bytes);
904 frames1 = snd_pcm_oss_read3(substream, buf, frames, in_kernel);
905 if (frames1 <= 0)
906 return frames1;
907 bytes = frames_to_bytes(runtime, frames1);
908 }
909 return bytes;
910 }
911
912 static ssize_t snd_pcm_oss_read1(struct snd_pcm_substream *substream, char __user *buf, size_t bytes)
913 {
914 size_t xfer = 0;
915 ssize_t tmp;
916 struct snd_pcm_runtime *runtime = substream->runtime;
917
918 if (atomic_read(&runtime->mmap_count))
919 return -ENXIO;
920
921 if ((tmp = snd_pcm_oss_make_ready(substream)) < 0)
922 return tmp;
923 while (bytes > 0) {
924 if (bytes < runtime->oss.period_bytes || runtime->oss.buffer_used > 0) {
925 if (runtime->oss.buffer_used == 0) {
926 tmp = snd_pcm_oss_read2(substream, runtime->oss.buffer, runtime->oss.period_bytes, 1);
927 if (tmp <= 0)
928 return xfer > 0 ? (snd_pcm_sframes_t)xfer : tmp;
929 runtime->oss.bytes += tmp;
930 runtime->oss.period_ptr = tmp;
931 runtime->oss.buffer_used = tmp;
932 }
933 tmp = bytes;
934 if ((size_t) tmp > runtime->oss.buffer_used)
935 tmp = runtime->oss.buffer_used;
936 if (copy_to_user(buf, runtime->oss.buffer + (runtime->oss.period_ptr - runtime->oss.buffer_used), tmp))
937 return xfer > 0 ? (snd_pcm_sframes_t)xfer : -EFAULT;
938 buf += tmp;
939 bytes -= tmp;
940 xfer += tmp;
941 runtime->oss.buffer_used -= tmp;
942 } else {
943 tmp = snd_pcm_oss_read2(substream, (char __force *)buf,
944 runtime->oss.period_bytes, 0);
945 if (tmp <= 0)
946 return xfer > 0 ? (snd_pcm_sframes_t)xfer : tmp;
947 runtime->oss.bytes += tmp;
948 buf += tmp;
949 bytes -= tmp;
950 xfer += tmp;
951 }
952 }
953 return xfer;
954 }
955
956 static int snd_pcm_oss_reset(struct snd_pcm_oss_file *pcm_oss_file)
957 {
958 struct snd_pcm_substream *substream;
959
960 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
961 if (substream != NULL) {
962 snd_pcm_kernel_playback_ioctl(substream, SNDRV_PCM_IOCTL_DROP, NULL);
963 substream->runtime->oss.prepare = 1;
964 }
965 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
966 if (substream != NULL) {
967 snd_pcm_kernel_capture_ioctl(substream, SNDRV_PCM_IOCTL_DROP, NULL);
968 substream->runtime->oss.prepare = 1;
969 }
970 return 0;
971 }
972
973 static int snd_pcm_oss_post(struct snd_pcm_oss_file *pcm_oss_file)
974 {
975 struct snd_pcm_substream *substream;
976 int err;
977
978 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
979 if (substream != NULL) {
980 if ((err = snd_pcm_oss_make_ready(substream)) < 0)
981 return err;
982 snd_pcm_kernel_playback_ioctl(substream, SNDRV_PCM_IOCTL_START, NULL);
983 }
984 /* note: all errors from the start action are ignored */
985 /* OSS apps do not know, how to handle them */
986 return 0;
987 }
988
989 static int snd_pcm_oss_sync1(struct snd_pcm_substream *substream, size_t size)
990 {
991 struct snd_pcm_runtime *runtime;
992 ssize_t result = 0;
993 long res;
994 wait_queue_t wait;
995
996 runtime = substream->runtime;
997 init_waitqueue_entry(&wait, current);
998 add_wait_queue(&runtime->sleep, &wait);
999 #ifdef OSS_DEBUG
1000 printk("sync1: size = %li\n", size);
1001 #endif
1002 while (1) {
1003 result = snd_pcm_oss_write2(substream, runtime->oss.buffer, size, 1);
1004 if (result > 0) {
1005 runtime->oss.buffer_used = 0;
1006 result = 0;
1007 break;
1008 }
1009 if (result != 0 && result != -EAGAIN)
1010 break;
1011 result = 0;
1012 set_current_state(TASK_INTERRUPTIBLE);
1013 snd_pcm_stream_lock_irq(substream);
1014 res = runtime->status->state;
1015 snd_pcm_stream_unlock_irq(substream);
1016 if (res != SNDRV_PCM_STATE_RUNNING) {
1017 set_current_state(TASK_RUNNING);
1018 break;
1019 }
1020 res = schedule_timeout(10 * HZ);
1021 if (signal_pending(current)) {
1022 result = -ERESTARTSYS;
1023 break;
1024 }
1025 if (res == 0) {
1026 snd_printk(KERN_ERR "OSS sync error - DMA timeout\n");
1027 result = -EIO;
1028 break;
1029 }
1030 }
1031 remove_wait_queue(&runtime->sleep, &wait);
1032 return result;
1033 }
1034
1035 static int snd_pcm_oss_sync(struct snd_pcm_oss_file *pcm_oss_file)
1036 {
1037 int err = 0;
1038 unsigned int saved_f_flags;
1039 struct snd_pcm_substream *substream;
1040 struct snd_pcm_runtime *runtime;
1041 snd_pcm_format_t format;
1042 unsigned long width;
1043 size_t size;
1044
1045 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
1046 if (substream != NULL) {
1047 runtime = substream->runtime;
1048 if (atomic_read(&runtime->mmap_count))
1049 goto __direct;
1050 if ((err = snd_pcm_oss_make_ready(substream)) < 0)
1051 return err;
1052 format = snd_pcm_oss_format_from(runtime->oss.format);
1053 width = snd_pcm_format_physical_width(format);
1054 if (runtime->oss.buffer_used > 0) {
1055 #ifdef OSS_DEBUG
1056 printk("sync: buffer_used\n");
1057 #endif
1058 size = (8 * (runtime->oss.period_bytes - runtime->oss.buffer_used) + 7) / width;
1059 snd_pcm_format_set_silence(format,
1060 runtime->oss.buffer + runtime->oss.buffer_used,
1061 size);
1062 err = snd_pcm_oss_sync1(substream, runtime->oss.period_bytes);
1063 if (err < 0)
1064 return err;
1065 } else if (runtime->oss.period_ptr > 0) {
1066 #ifdef OSS_DEBUG
1067 printk("sync: period_ptr\n");
1068 #endif
1069 size = runtime->oss.period_bytes - runtime->oss.period_ptr;
1070 snd_pcm_format_set_silence(format,
1071 runtime->oss.buffer,
1072 size * 8 / width);
1073 err = snd_pcm_oss_sync1(substream, size);
1074 if (err < 0)
1075 return err;
1076 }
1077 /*
1078 * The ALSA's period might be a bit large than OSS one.
1079 * Fill the remain portion of ALSA period with zeros.
1080 */
1081 size = runtime->control->appl_ptr % runtime->period_size;
1082 if (size > 0) {
1083 size = runtime->period_size - size;
1084 if (runtime->access == SNDRV_PCM_ACCESS_RW_INTERLEAVED) {
1085 size = (runtime->frame_bits * size) / 8;
1086 while (size > 0) {
1087 mm_segment_t fs;
1088 size_t size1 = size < runtime->oss.period_bytes ? size : runtime->oss.period_bytes;
1089 size -= size1;
1090 size1 *= 8;
1091 size1 /= runtime->sample_bits;
1092 snd_pcm_format_set_silence(runtime->format,
1093 runtime->oss.buffer,
1094 size1);
1095 fs = snd_enter_user();
1096 snd_pcm_lib_write(substream, (void __user *)runtime->oss.buffer, size1);
1097 snd_leave_user(fs);
1098 }
1099 } else if (runtime->access == SNDRV_PCM_ACCESS_RW_NONINTERLEAVED) {
1100 void __user *buffers[runtime->channels];
1101 memset(buffers, 0, runtime->channels * sizeof(void *));
1102 snd_pcm_lib_writev(substream, buffers, size);
1103 }
1104 }
1105 /*
1106 * finish sync: drain the buffer
1107 */
1108 __direct:
1109 saved_f_flags = substream->ffile->f_flags;
1110 substream->ffile->f_flags &= ~O_NONBLOCK;
1111 err = snd_pcm_kernel_playback_ioctl(substream, SNDRV_PCM_IOCTL_DRAIN, NULL);
1112 substream->ffile->f_flags = saved_f_flags;
1113 if (err < 0)
1114 return err;
1115 runtime->oss.prepare = 1;
1116 }
1117
1118 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
1119 if (substream != NULL) {
1120 if ((err = snd_pcm_oss_make_ready(substream)) < 0)
1121 return err;
1122 runtime = substream->runtime;
1123 err = snd_pcm_kernel_capture_ioctl(substream, SNDRV_PCM_IOCTL_DROP, NULL);
1124 if (err < 0)
1125 return err;
1126 runtime->oss.buffer_used = 0;
1127 runtime->oss.prepare = 1;
1128 }
1129 return 0;
1130 }
1131
1132 static int snd_pcm_oss_set_rate(struct snd_pcm_oss_file *pcm_oss_file, int rate)
1133 {
1134 int idx;
1135
1136 for (idx = 1; idx >= 0; --idx) {
1137 struct snd_pcm_substream *substream = pcm_oss_file->streams[idx];
1138 struct snd_pcm_runtime *runtime;
1139 if (substream == NULL)
1140 continue;
1141 runtime = substream->runtime;
1142 if (rate < 1000)
1143 rate = 1000;
1144 else if (rate > 192000)
1145 rate = 192000;
1146 if (runtime->oss.rate != rate) {
1147 runtime->oss.params = 1;
1148 runtime->oss.rate = rate;
1149 }
1150 }
1151 return snd_pcm_oss_get_rate(pcm_oss_file);
1152 }
1153
1154 static int snd_pcm_oss_get_rate(struct snd_pcm_oss_file *pcm_oss_file)
1155 {
1156 struct snd_pcm_substream *substream;
1157 int err;
1158
1159 if ((err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream)) < 0)
1160 return err;
1161 return substream->runtime->oss.rate;
1162 }
1163
1164 static int snd_pcm_oss_set_channels(struct snd_pcm_oss_file *pcm_oss_file, unsigned int channels)
1165 {
1166 int idx;
1167 if (channels < 1)
1168 channels = 1;
1169 if (channels > 128)
1170 return -EINVAL;
1171 for (idx = 1; idx >= 0; --idx) {
1172 struct snd_pcm_substream *substream = pcm_oss_file->streams[idx];
1173 struct snd_pcm_runtime *runtime;
1174 if (substream == NULL)
1175 continue;
1176 runtime = substream->runtime;
1177 if (runtime->oss.channels != channels) {
1178 runtime->oss.params = 1;
1179 runtime->oss.channels = channels;
1180 }
1181 }
1182 return snd_pcm_oss_get_channels(pcm_oss_file);
1183 }
1184
1185 static int snd_pcm_oss_get_channels(struct snd_pcm_oss_file *pcm_oss_file)
1186 {
1187 struct snd_pcm_substream *substream;
1188 int err;
1189
1190 if ((err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream)) < 0)
1191 return err;
1192 return substream->runtime->oss.channels;
1193 }
1194
1195 static int snd_pcm_oss_get_block_size(struct snd_pcm_oss_file *pcm_oss_file)
1196 {
1197 struct snd_pcm_substream *substream;
1198 int err;
1199
1200 if ((err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream)) < 0)
1201 return err;
1202 return substream->runtime->oss.period_bytes;
1203 }
1204
1205 static int snd_pcm_oss_get_formats(struct snd_pcm_oss_file *pcm_oss_file)
1206 {
1207 struct snd_pcm_substream *substream;
1208 int err;
1209 int direct;
1210 struct snd_pcm_hw_params *params;
1211 unsigned int formats = 0;
1212 struct snd_mask format_mask;
1213 int fmt;
1214
1215 if ((err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream)) < 0)
1216 return err;
1217 if (atomic_read(&substream->runtime->mmap_count)) {
1218 direct = 1;
1219 } else {
1220 struct snd_pcm_oss_setup *setup = substream->oss.setup;
1221 direct = (setup != NULL && setup->direct);
1222 }
1223 if (!direct)
1224 return AFMT_MU_LAW | AFMT_U8 |
1225 AFMT_S16_LE | AFMT_S16_BE |
1226 AFMT_S8 | AFMT_U16_LE |
1227 AFMT_U16_BE;
1228 params = kmalloc(sizeof(*params), GFP_KERNEL);
1229 if (!params)
1230 return -ENOMEM;
1231 _snd_pcm_hw_params_any(params);
1232 err = snd_pcm_hw_refine(substream, params);
1233 format_mask = *hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT);
1234 kfree(params);
1235 snd_assert(err >= 0, return err);
1236 for (fmt = 0; fmt < 32; ++fmt) {
1237 if (snd_mask_test(&format_mask, fmt)) {
1238 int f = snd_pcm_oss_format_to(fmt);
1239 if (f >= 0)
1240 formats |= f;
1241 }
1242 }
1243 return formats;
1244 }
1245
1246 static int snd_pcm_oss_set_format(struct snd_pcm_oss_file *pcm_oss_file, int format)
1247 {
1248 int formats, idx;
1249
1250 if (format != AFMT_QUERY) {
1251 formats = snd_pcm_oss_get_formats(pcm_oss_file);
1252 if (!(formats & format))
1253 format = AFMT_U8;
1254 for (idx = 1; idx >= 0; --idx) {
1255 struct snd_pcm_substream *substream = pcm_oss_file->streams[idx];
1256 struct snd_pcm_runtime *runtime;
1257 if (substream == NULL)
1258 continue;
1259 runtime = substream->runtime;
1260 if (runtime->oss.format != format) {
1261 runtime->oss.params = 1;
1262 runtime->oss.format = format;
1263 }
1264 }
1265 }
1266 return snd_pcm_oss_get_format(pcm_oss_file);
1267 }
1268
1269 static int snd_pcm_oss_get_format(struct snd_pcm_oss_file *pcm_oss_file)
1270 {
1271 struct snd_pcm_substream *substream;
1272 int err;
1273
1274 if ((err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream)) < 0)
1275 return err;
1276 return substream->runtime->oss.format;
1277 }
1278
1279 static int snd_pcm_oss_set_subdivide1(struct snd_pcm_substream *substream, int subdivide)
1280 {
1281 struct snd_pcm_runtime *runtime;
1282
1283 if (substream == NULL)
1284 return 0;
1285 runtime = substream->runtime;
1286 if (subdivide == 0) {
1287 subdivide = runtime->oss.subdivision;
1288 if (subdivide == 0)
1289 subdivide = 1;
1290 return subdivide;
1291 }
1292 if (runtime->oss.subdivision || runtime->oss.fragshift)
1293 return -EINVAL;
1294 if (subdivide != 1 && subdivide != 2 && subdivide != 4 &&
1295 subdivide != 8 && subdivide != 16)
1296 return -EINVAL;
1297 runtime->oss.subdivision = subdivide;
1298 runtime->oss.params = 1;
1299 return subdivide;
1300 }
1301
1302 static int snd_pcm_oss_set_subdivide(struct snd_pcm_oss_file *pcm_oss_file, int subdivide)
1303 {
1304 int err = -EINVAL, idx;
1305
1306 for (idx = 1; idx >= 0; --idx) {
1307 struct snd_pcm_substream *substream = pcm_oss_file->streams[idx];
1308 if (substream == NULL)
1309 continue;
1310 if ((err = snd_pcm_oss_set_subdivide1(substream, subdivide)) < 0)
1311 return err;
1312 }
1313 return err;
1314 }
1315
1316 static int snd_pcm_oss_set_fragment1(struct snd_pcm_substream *substream, unsigned int val)
1317 {
1318 struct snd_pcm_runtime *runtime;
1319
1320 if (substream == NULL)
1321 return 0;
1322 runtime = substream->runtime;
1323 if (runtime->oss.subdivision || runtime->oss.fragshift)
1324 return -EINVAL;
1325 runtime->oss.fragshift = val & 0xffff;
1326 runtime->oss.maxfrags = (val >> 16) & 0xffff;
1327 if (runtime->oss.fragshift < 4) /* < 16 */
1328 runtime->oss.fragshift = 4;
1329 if (runtime->oss.maxfrags < 2)
1330 runtime->oss.maxfrags = 2;
1331 runtime->oss.params = 1;
1332 return 0;
1333 }
1334
1335 static int snd_pcm_oss_set_fragment(struct snd_pcm_oss_file *pcm_oss_file, unsigned int val)
1336 {
1337 int err = -EINVAL, idx;
1338
1339 for (idx = 1; idx >= 0; --idx) {
1340 struct snd_pcm_substream *substream = pcm_oss_file->streams[idx];
1341 if (substream == NULL)
1342 continue;
1343 if ((err = snd_pcm_oss_set_fragment1(substream, val)) < 0)
1344 return err;
1345 }
1346 return err;
1347 }
1348
1349 static int snd_pcm_oss_nonblock(struct file * file)
1350 {
1351 file->f_flags |= O_NONBLOCK;
1352 return 0;
1353 }
1354
1355 static int snd_pcm_oss_get_caps1(struct snd_pcm_substream *substream, int res)
1356 {
1357
1358 if (substream == NULL) {
1359 res &= ~DSP_CAP_DUPLEX;
1360 return res;
1361 }
1362 #ifdef DSP_CAP_MULTI
1363 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
1364 if (substream->pstr->substream_count > 1)
1365 res |= DSP_CAP_MULTI;
1366 #endif
1367 /* DSP_CAP_REALTIME is set all times: */
1368 /* all ALSA drivers can return actual pointer in ring buffer */
1369 #if defined(DSP_CAP_REALTIME) && 0
1370 {
1371 struct snd_pcm_runtime *runtime = substream->runtime;
1372 if (runtime->info & (SNDRV_PCM_INFO_BLOCK_TRANSFER|SNDRV_PCM_INFO_BATCH))
1373 res &= ~DSP_CAP_REALTIME;
1374 }
1375 #endif
1376 return res;
1377 }
1378
1379 static int snd_pcm_oss_get_caps(struct snd_pcm_oss_file *pcm_oss_file)
1380 {
1381 int result, idx;
1382
1383 result = DSP_CAP_TRIGGER | DSP_CAP_MMAP | DSP_CAP_DUPLEX | DSP_CAP_REALTIME;
1384 for (idx = 0; idx < 2; idx++) {
1385 struct snd_pcm_substream *substream = pcm_oss_file->streams[idx];
1386 result = snd_pcm_oss_get_caps1(substream, result);
1387 }
1388 result |= 0x0001; /* revision - same as SB AWE 64 */
1389 return result;
1390 }
1391
1392 static void snd_pcm_oss_simulate_fill(struct snd_pcm_substream *substream, snd_pcm_uframes_t hw_ptr)
1393 {
1394 struct snd_pcm_runtime *runtime = substream->runtime;
1395 snd_pcm_uframes_t appl_ptr;
1396 appl_ptr = hw_ptr + runtime->buffer_size;
1397 appl_ptr %= runtime->boundary;
1398 runtime->control->appl_ptr = appl_ptr;
1399 }
1400
1401 static int snd_pcm_oss_set_trigger(struct snd_pcm_oss_file *pcm_oss_file, int trigger)
1402 {
1403 struct snd_pcm_runtime *runtime;
1404 struct snd_pcm_substream *psubstream = NULL, *csubstream = NULL;
1405 int err, cmd;
1406
1407 #ifdef OSS_DEBUG
1408 printk("pcm_oss: trigger = 0x%x\n", trigger);
1409 #endif
1410
1411 psubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
1412 csubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
1413
1414 if (psubstream) {
1415 if ((err = snd_pcm_oss_make_ready(psubstream)) < 0)
1416 return err;
1417 }
1418 if (csubstream) {
1419 if ((err = snd_pcm_oss_make_ready(csubstream)) < 0)
1420 return err;
1421 }
1422 if (psubstream) {
1423 runtime = psubstream->runtime;
1424 if (trigger & PCM_ENABLE_OUTPUT) {
1425 if (runtime->oss.trigger)
1426 goto _skip1;
1427 if (atomic_read(&psubstream->runtime->mmap_count))
1428 snd_pcm_oss_simulate_fill(psubstream, runtime->hw_ptr_interrupt);
1429 runtime->oss.trigger = 1;
1430 runtime->start_threshold = 1;
1431 cmd = SNDRV_PCM_IOCTL_START;
1432 } else {
1433 if (!runtime->oss.trigger)
1434 goto _skip1;
1435 runtime->oss.trigger = 0;
1436 runtime->start_threshold = runtime->boundary;
1437 cmd = SNDRV_PCM_IOCTL_DROP;
1438 runtime->oss.prepare = 1;
1439 }
1440 err = snd_pcm_kernel_playback_ioctl(psubstream, cmd, NULL);
1441 if (err < 0)
1442 return err;
1443 }
1444 _skip1:
1445 if (csubstream) {
1446 runtime = csubstream->runtime;
1447 if (trigger & PCM_ENABLE_INPUT) {
1448 if (runtime->oss.trigger)
1449 goto _skip2;
1450 runtime->oss.trigger = 1;
1451 runtime->start_threshold = 1;
1452 cmd = SNDRV_PCM_IOCTL_START;
1453 } else {
1454 if (!runtime->oss.trigger)
1455 goto _skip2;
1456 runtime->oss.trigger = 0;
1457 runtime->start_threshold = runtime->boundary;
1458 cmd = SNDRV_PCM_IOCTL_DROP;
1459 runtime->oss.prepare = 1;
1460 }
1461 err = snd_pcm_kernel_capture_ioctl(csubstream, cmd, NULL);
1462 if (err < 0)
1463 return err;
1464 }
1465 _skip2:
1466 return 0;
1467 }
1468
1469 static int snd_pcm_oss_get_trigger(struct snd_pcm_oss_file *pcm_oss_file)
1470 {
1471 struct snd_pcm_substream *psubstream = NULL, *csubstream = NULL;
1472 int result = 0;
1473
1474 psubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
1475 csubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
1476 if (psubstream && psubstream->runtime && psubstream->runtime->oss.trigger)
1477 result |= PCM_ENABLE_OUTPUT;
1478 if (csubstream && csubstream->runtime && csubstream->runtime->oss.trigger)
1479 result |= PCM_ENABLE_INPUT;
1480 return result;
1481 }
1482
1483 static int snd_pcm_oss_get_odelay(struct snd_pcm_oss_file *pcm_oss_file)
1484 {
1485 struct snd_pcm_substream *substream;
1486 struct snd_pcm_runtime *runtime;
1487 snd_pcm_sframes_t delay;
1488 int err;
1489
1490 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
1491 if (substream == NULL)
1492 return -EINVAL;
1493 if ((err = snd_pcm_oss_make_ready(substream)) < 0)
1494 return err;
1495 runtime = substream->runtime;
1496 if (runtime->oss.params || runtime->oss.prepare)
1497 return 0;
1498 err = snd_pcm_kernel_playback_ioctl(substream, SNDRV_PCM_IOCTL_DELAY, &delay);
1499 if (err == -EPIPE)
1500 delay = 0; /* hack for broken OSS applications */
1501 else if (err < 0)
1502 return err;
1503 return snd_pcm_oss_bytes(substream, delay);
1504 }
1505
1506 static int snd_pcm_oss_get_ptr(struct snd_pcm_oss_file *pcm_oss_file, int stream, struct count_info __user * _info)
1507 {
1508 struct snd_pcm_substream *substream;
1509 struct snd_pcm_runtime *runtime;
1510 snd_pcm_sframes_t delay;
1511 int fixup;
1512 struct count_info info;
1513 int err;
1514
1515 if (_info == NULL)
1516 return -EFAULT;
1517 substream = pcm_oss_file->streams[stream];
1518 if (substream == NULL)
1519 return -EINVAL;
1520 if ((err = snd_pcm_oss_make_ready(substream)) < 0)
1521 return err;
1522 runtime = substream->runtime;
1523 if (runtime->oss.params || runtime->oss.prepare) {
1524 memset(&info, 0, sizeof(info));
1525 if (copy_to_user(_info, &info, sizeof(info)))
1526 return -EFAULT;
1527 return 0;
1528 }
1529 if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
1530 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DELAY, &delay);
1531 if (err == -EPIPE || err == -ESTRPIPE || (! err && delay < 0)) {
1532 err = 0;
1533 delay = 0;
1534 fixup = 0;
1535 } else {
1536 fixup = runtime->oss.buffer_used;
1537 }
1538 } else {
1539 err = snd_pcm_oss_capture_position_fixup(substream, &delay);
1540 fixup = -runtime->oss.buffer_used;
1541 }
1542 if (err < 0)
1543 return err;
1544 info.ptr = snd_pcm_oss_bytes(substream, runtime->status->hw_ptr % runtime->buffer_size);
1545 if (atomic_read(&runtime->mmap_count)) {
1546 snd_pcm_sframes_t n;
1547 n = (delay = runtime->hw_ptr_interrupt) - runtime->oss.prev_hw_ptr_interrupt;
1548 if (n < 0)
1549 n += runtime->boundary;
1550 info.blocks = n / runtime->period_size;
1551 runtime->oss.prev_hw_ptr_interrupt = delay;
1552 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
1553 snd_pcm_oss_simulate_fill(substream, delay);
1554 info.bytes = snd_pcm_oss_bytes(substream, runtime->status->hw_ptr) & INT_MAX;
1555 } else {
1556 delay = snd_pcm_oss_bytes(substream, delay);
1557 if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
1558 struct snd_pcm_oss_setup *setup = substream->oss.setup;
1559 if (setup && setup->buggyptr)
1560 info.blocks = (runtime->oss.buffer_bytes - delay - fixup) / runtime->oss.period_bytes;
1561 else
1562 info.blocks = (delay + fixup) / runtime->oss.period_bytes;
1563 info.bytes = (runtime->oss.bytes - delay) & INT_MAX;
1564 } else {
1565 delay += fixup;
1566 info.blocks = delay / runtime->oss.period_bytes;
1567 info.bytes = (runtime->oss.bytes + delay) & INT_MAX;
1568 }
1569 }
1570 if (copy_to_user(_info, &info, sizeof(info)))
1571 return -EFAULT;
1572 return 0;
1573 }
1574
1575 static int snd_pcm_oss_get_space(struct snd_pcm_oss_file *pcm_oss_file, int stream, struct audio_buf_info __user *_info)
1576 {
1577 struct snd_pcm_substream *substream;
1578 struct snd_pcm_runtime *runtime;
1579 snd_pcm_sframes_t avail;
1580 int fixup;
1581 struct audio_buf_info info;
1582 int err;
1583
1584 if (_info == NULL)
1585 return -EFAULT;
1586 substream = pcm_oss_file->streams[stream];
1587 if (substream == NULL)
1588 return -EINVAL;
1589 runtime = substream->runtime;
1590
1591 if (runtime->oss.params &&
1592 (err = snd_pcm_oss_change_params(substream)) < 0)
1593 return err;
1594
1595 info.fragsize = runtime->oss.period_bytes;
1596 info.fragstotal = runtime->periods;
1597 if (runtime->oss.prepare) {
1598 if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
1599 info.bytes = runtime->oss.period_bytes * runtime->oss.periods;
1600 info.fragments = runtime->oss.periods;
1601 } else {
1602 info.bytes = 0;
1603 info.fragments = 0;
1604 }
1605 } else {
1606 if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
1607 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DELAY, &avail);
1608 if (err == -EPIPE || err == -ESTRPIPE || (! err && avail < 0)) {
1609 avail = runtime->buffer_size;
1610 err = 0;
1611 fixup = 0;
1612 } else {
1613 avail = runtime->buffer_size - avail;
1614 fixup = -runtime->oss.buffer_used;
1615 }
1616 } else {
1617 err = snd_pcm_oss_capture_position_fixup(substream, &avail);
1618 fixup = runtime->oss.buffer_used;
1619 }
1620 if (err < 0)
1621 return err;
1622 info.bytes = snd_pcm_oss_bytes(substream, avail) + fixup;
1623 info.fragments = info.bytes / runtime->oss.period_bytes;
1624 }
1625
1626 #ifdef OSS_DEBUG
1627 printk("pcm_oss: space: bytes = %i, fragments = %i, fragstotal = %i, fragsize = %i\n", info.bytes, info.fragments, info.fragstotal, info.fragsize);
1628 #endif
1629 if (copy_to_user(_info, &info, sizeof(info)))
1630 return -EFAULT;
1631 return 0;
1632 }
1633
1634 static int snd_pcm_oss_get_mapbuf(struct snd_pcm_oss_file *pcm_oss_file, int stream, struct buffmem_desc __user * _info)
1635 {
1636 // it won't be probably implemented
1637 // snd_printd("TODO: snd_pcm_oss_get_mapbuf\n");
1638 return -EINVAL;
1639 }
1640
1641 static struct snd_pcm_oss_setup *snd_pcm_oss_look_for_setup(struct snd_pcm *pcm, int stream, const char *task_name)
1642 {
1643 const char *ptr, *ptrl;
1644 struct snd_pcm_oss_setup *setup;
1645
1646 mutex_lock(&pcm->streams[stream].oss.setup_mutex);
1647 for (setup = pcm->streams[stream].oss.setup_list; setup; setup = setup->next) {
1648 if (!strcmp(setup->task_name, task_name)) {
1649 mutex_unlock(&pcm->streams[stream].oss.setup_mutex);
1650 return setup;
1651 }
1652 }
1653 ptr = ptrl = task_name;
1654 while (*ptr) {
1655 if (*ptr == '/')
1656 ptrl = ptr + 1;
1657 ptr++;
1658 }
1659 if (ptrl == task_name) {
1660 goto __not_found;
1661 return NULL;
1662 }
1663 for (setup = pcm->streams[stream].oss.setup_list; setup; setup = setup->next) {
1664 if (!strcmp(setup->task_name, ptrl)) {
1665 mutex_unlock(&pcm->streams[stream].oss.setup_mutex);
1666 return setup;
1667 }
1668 }
1669 __not_found:
1670 mutex_unlock(&pcm->streams[stream].oss.setup_mutex);
1671 return NULL;
1672 }
1673
1674 static void snd_pcm_oss_init_substream(struct snd_pcm_substream *substream,
1675 struct snd_pcm_oss_setup *setup,
1676 int minor)
1677 {
1678 struct snd_pcm_runtime *runtime;
1679
1680 substream->oss.oss = 1;
1681 substream->oss.setup = setup;
1682 runtime = substream->runtime;
1683 runtime->oss.params = 1;
1684 runtime->oss.trigger = 1;
1685 runtime->oss.rate = 8000;
1686 switch (SNDRV_MINOR_OSS_DEVICE(minor)) {
1687 case SNDRV_MINOR_OSS_PCM_8:
1688 runtime->oss.format = AFMT_U8;
1689 break;
1690 case SNDRV_MINOR_OSS_PCM_16:
1691 runtime->oss.format = AFMT_S16_LE;
1692 break;
1693 default:
1694 runtime->oss.format = AFMT_MU_LAW;
1695 }
1696 runtime->oss.channels = 1;
1697 runtime->oss.fragshift = 0;
1698 runtime->oss.maxfrags = 0;
1699 runtime->oss.subdivision = 0;
1700 }
1701
1702 static void snd_pcm_oss_release_substream(struct snd_pcm_substream *substream)
1703 {
1704 struct snd_pcm_runtime *runtime;
1705 runtime = substream->runtime;
1706 vfree(runtime->oss.buffer);
1707 #ifdef CONFIG_SND_PCM_OSS_PLUGINS
1708 snd_pcm_oss_plugin_clear(substream);
1709 #endif
1710 substream->oss.file = NULL;
1711 substream->oss.oss = 0;
1712 }
1713
1714 static int snd_pcm_oss_release_file(struct snd_pcm_oss_file *pcm_oss_file)
1715 {
1716 int cidx;
1717 snd_assert(pcm_oss_file != NULL, return -ENXIO);
1718 for (cidx = 0; cidx < 2; ++cidx) {
1719 struct snd_pcm_substream *substream = pcm_oss_file->streams[cidx];
1720 struct snd_pcm_runtime *runtime;
1721 if (substream == NULL)
1722 continue;
1723 runtime = substream->runtime;
1724
1725 snd_pcm_stream_lock_irq(substream);
1726 if (snd_pcm_running(substream))
1727 snd_pcm_stop(substream, SNDRV_PCM_STATE_SETUP);
1728 snd_pcm_stream_unlock_irq(substream);
1729 if (substream->ffile != NULL) {
1730 if (substream->ops->hw_free != NULL)
1731 substream->ops->hw_free(substream);
1732 substream->ops->close(substream);
1733 substream->ffile = NULL;
1734 }
1735 snd_pcm_oss_release_substream(substream);
1736 snd_pcm_release_substream(substream);
1737 }
1738 kfree(pcm_oss_file);
1739 return 0;
1740 }
1741
1742 static int snd_pcm_oss_open_file(struct file *file,
1743 struct snd_pcm *pcm,
1744 struct snd_pcm_oss_file **rpcm_oss_file,
1745 int minor,
1746 struct snd_pcm_oss_setup *psetup,
1747 struct snd_pcm_oss_setup *csetup)
1748 {
1749 int err = 0;
1750 struct snd_pcm_oss_file *pcm_oss_file;
1751 struct snd_pcm_substream *psubstream = NULL, *csubstream = NULL;
1752 unsigned int f_mode = file->f_mode;
1753
1754 snd_assert(rpcm_oss_file != NULL, return -EINVAL);
1755 *rpcm_oss_file = NULL;
1756
1757 pcm_oss_file = kzalloc(sizeof(*pcm_oss_file), GFP_KERNEL);
1758 if (pcm_oss_file == NULL)
1759 return -ENOMEM;
1760
1761 if ((f_mode & (FMODE_WRITE|FMODE_READ)) == (FMODE_WRITE|FMODE_READ) &&
1762 (pcm->info_flags & SNDRV_PCM_INFO_HALF_DUPLEX))
1763 f_mode = FMODE_WRITE;
1764 if ((f_mode & FMODE_WRITE) && !(psetup && psetup->disable)) {
1765 if ((err = snd_pcm_open_substream(pcm, SNDRV_PCM_STREAM_PLAYBACK,
1766 &psubstream)) < 0) {
1767 snd_pcm_oss_release_file(pcm_oss_file);
1768 return err;
1769 }
1770 pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK] = psubstream;
1771 }
1772 if ((f_mode & FMODE_READ) && !(csetup && csetup->disable)) {
1773 if ((err = snd_pcm_open_substream(pcm, SNDRV_PCM_STREAM_CAPTURE,
1774 &csubstream)) < 0) {
1775 if (!(f_mode & FMODE_WRITE) || err != -ENODEV) {
1776 snd_pcm_oss_release_file(pcm_oss_file);
1777 return err;
1778 } else {
1779 csubstream = NULL;
1780 }
1781 }
1782 pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE] = csubstream;
1783 }
1784
1785 if (psubstream == NULL && csubstream == NULL) {
1786 snd_pcm_oss_release_file(pcm_oss_file);
1787 return -EINVAL;
1788 }
1789 if (psubstream != NULL) {
1790 psubstream->oss.file = pcm_oss_file;
1791 err = snd_pcm_hw_constraints_init(psubstream);
1792 if (err < 0) {
1793 snd_printd("snd_pcm_hw_constraint_init failed\n");
1794 snd_pcm_oss_release_file(pcm_oss_file);
1795 return err;
1796 }
1797 if ((err = psubstream->ops->open(psubstream)) < 0) {
1798 snd_pcm_oss_release_file(pcm_oss_file);
1799 return err;
1800 }
1801 psubstream->ffile = file;
1802 err = snd_pcm_hw_constraints_complete(psubstream);
1803 if (err < 0) {
1804 snd_printd("snd_pcm_hw_constraint_complete failed\n");
1805 snd_pcm_oss_release_file(pcm_oss_file);
1806 return err;
1807 }
1808 snd_pcm_oss_init_substream(psubstream, psetup, minor);
1809 }
1810 if (csubstream != NULL) {
1811 csubstream->oss.file = pcm_oss_file;
1812 err = snd_pcm_hw_constraints_init(csubstream);
1813 if (err < 0) {
1814 snd_printd("snd_pcm_hw_constraint_init failed\n");
1815 snd_pcm_oss_release_file(pcm_oss_file);
1816 return err;
1817 }
1818 if ((err = csubstream->ops->open(csubstream)) < 0) {
1819 snd_pcm_oss_release_file(pcm_oss_file);
1820 return err;
1821 }
1822 csubstream->ffile = file;
1823 err = snd_pcm_hw_constraints_complete(csubstream);
1824 if (err < 0) {
1825 snd_printd("snd_pcm_hw_constraint_complete failed\n");
1826 snd_pcm_oss_release_file(pcm_oss_file);
1827 return err;
1828 }
1829 snd_pcm_oss_init_substream(csubstream, csetup, minor);
1830 }
1831
1832 file->private_data = pcm_oss_file;
1833 *rpcm_oss_file = pcm_oss_file;
1834 return 0;
1835 }
1836
1837
1838 static int snd_task_name(struct task_struct *task, char *name, size_t size)
1839 {
1840 unsigned int idx;
1841
1842 snd_assert(task != NULL && name != NULL && size >= 2, return -EINVAL);
1843 for (idx = 0; idx < sizeof(task->comm) && idx + 1 < size; idx++)
1844 name[idx] = task->comm[idx];
1845 name[idx] = '\0';
1846 return 0;
1847 }
1848
1849 static int snd_pcm_oss_open(struct inode *inode, struct file *file)
1850 {
1851 int err;
1852 char task_name[32];
1853 struct snd_pcm *pcm;
1854 struct snd_pcm_oss_file *pcm_oss_file;
1855 struct snd_pcm_oss_setup *psetup = NULL, *csetup = NULL;
1856 int nonblock;
1857 wait_queue_t wait;
1858
1859 pcm = snd_lookup_oss_minor_data(iminor(inode),
1860 SNDRV_OSS_DEVICE_TYPE_PCM);
1861 if (pcm == NULL) {
1862 err = -ENODEV;
1863 goto __error1;
1864 }
1865 err = snd_card_file_add(pcm->card, file);
1866 if (err < 0)
1867 goto __error1;
1868 if (!try_module_get(pcm->card->module)) {
1869 err = -EFAULT;
1870 goto __error2;
1871 }
1872 if (snd_task_name(current, task_name, sizeof(task_name)) < 0) {
1873 err = -EFAULT;
1874 goto __error;
1875 }
1876 if (file->f_mode & FMODE_WRITE)
1877 psetup = snd_pcm_oss_look_for_setup(pcm, SNDRV_PCM_STREAM_PLAYBACK, task_name);
1878 if (file->f_mode & FMODE_READ)
1879 csetup = snd_pcm_oss_look_for_setup(pcm, SNDRV_PCM_STREAM_CAPTURE, task_name);
1880
1881 nonblock = !!(file->f_flags & O_NONBLOCK);
1882 if (psetup && !psetup->disable) {
1883 if (psetup->nonblock)
1884 nonblock = 1;
1885 else if (psetup->block)
1886 nonblock = 0;
1887 } else if (csetup && !csetup->disable) {
1888 if (csetup->nonblock)
1889 nonblock = 1;
1890 else if (csetup->block)
1891 nonblock = 0;
1892 }
1893 if (!nonblock)
1894 nonblock = nonblock_open;
1895
1896 init_waitqueue_entry(&wait, current);
1897 add_wait_queue(&pcm->open_wait, &wait);
1898 mutex_lock(&pcm->open_mutex);
1899 while (1) {
1900 err = snd_pcm_oss_open_file(file, pcm, &pcm_oss_file,
1901 iminor(inode), psetup, csetup);
1902 if (err >= 0)
1903 break;
1904 if (err == -EAGAIN) {
1905 if (nonblock) {
1906 err = -EBUSY;
1907 break;
1908 }
1909 } else
1910 break;
1911 set_current_state(TASK_INTERRUPTIBLE);
1912 mutex_unlock(&pcm->open_mutex);
1913 schedule();
1914 mutex_lock(&pcm->open_mutex);
1915 if (signal_pending(current)) {
1916 err = -ERESTARTSYS;
1917 break;
1918 }
1919 }
1920 remove_wait_queue(&pcm->open_wait, &wait);
1921 mutex_unlock(&pcm->open_mutex);
1922 if (err < 0)
1923 goto __error;
1924 return err;
1925
1926 __error:
1927 module_put(pcm->card->module);
1928 __error2:
1929 snd_card_file_remove(pcm->card, file);
1930 __error1:
1931 return err;
1932 }
1933
1934 static int snd_pcm_oss_release(struct inode *inode, struct file *file)
1935 {
1936 struct snd_pcm *pcm;
1937 struct snd_pcm_substream *substream;
1938 struct snd_pcm_oss_file *pcm_oss_file;
1939
1940 pcm_oss_file = file->private_data;
1941 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
1942 if (substream == NULL)
1943 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
1944 snd_assert(substream != NULL, return -ENXIO);
1945 pcm = substream->pcm;
1946 snd_pcm_oss_sync(pcm_oss_file);
1947 mutex_lock(&pcm->open_mutex);
1948 snd_pcm_oss_release_file(pcm_oss_file);
1949 mutex_unlock(&pcm->open_mutex);
1950 wake_up(&pcm->open_wait);
1951 module_put(pcm->card->module);
1952 snd_card_file_remove(pcm->card, file);
1953 return 0;
1954 }
1955
1956 static long snd_pcm_oss_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
1957 {
1958 struct snd_pcm_oss_file *pcm_oss_file;
1959 int __user *p = (int __user *)arg;
1960 int res;
1961
1962 pcm_oss_file = file->private_data;
1963 if (cmd == OSS_GETVERSION)
1964 return put_user(SNDRV_OSS_VERSION, p);
1965 if (cmd == OSS_ALSAEMULVER)
1966 return put_user(1, p);
1967 #if defined(CONFIG_SND_MIXER_OSS) || (defined(MODULE) && defined(CONFIG_SND_MIXER_OSS_MODULE))
1968 if (((cmd >> 8) & 0xff) == 'M') { /* mixer ioctl - for OSS compatibility */
1969 struct snd_pcm_substream *substream;
1970 int idx;
1971 for (idx = 0; idx < 2; ++idx) {
1972 substream = pcm_oss_file->streams[idx];
1973 if (substream != NULL)
1974 break;
1975 }
1976 snd_assert(substream != NULL, return -ENXIO);
1977 return snd_mixer_oss_ioctl_card(substream->pcm->card, cmd, arg);
1978 }
1979 #endif
1980 if (((cmd >> 8) & 0xff) != 'P')
1981 return -EINVAL;
1982 #ifdef OSS_DEBUG
1983 printk("pcm_oss: ioctl = 0x%x\n", cmd);
1984 #endif
1985 switch (cmd) {
1986 case SNDCTL_DSP_RESET:
1987 return snd_pcm_oss_reset(pcm_oss_file);
1988 case SNDCTL_DSP_SYNC:
1989 return snd_pcm_oss_sync(pcm_oss_file);
1990 case SNDCTL_DSP_SPEED:
1991 if (get_user(res, p))
1992 return -EFAULT;
1993 if ((res = snd_pcm_oss_set_rate(pcm_oss_file, res))<0)
1994 return res;
1995 return put_user(res, p);
1996 case SOUND_PCM_READ_RATE:
1997 res = snd_pcm_oss_get_rate(pcm_oss_file);
1998 if (res < 0)
1999 return res;
2000 return put_user(res, p);
2001 case SNDCTL_DSP_STEREO:
2002 if (get_user(res, p))
2003 return -EFAULT;
2004 res = res > 0 ? 2 : 1;
2005 if ((res = snd_pcm_oss_set_channels(pcm_oss_file, res)) < 0)
2006 return res;
2007 return put_user(--res, p);
2008 case SNDCTL_DSP_GETBLKSIZE:
2009 res = snd_pcm_oss_get_block_size(pcm_oss_file);
2010 if (res < 0)
2011 return res;
2012 return put_user(res, p);
2013 case SNDCTL_DSP_SETFMT:
2014 if (get_user(res, p))
2015 return -EFAULT;
2016 res = snd_pcm_oss_set_format(pcm_oss_file, res);
2017 if (res < 0)
2018 return res;
2019 return put_user(res, p);
2020 case SOUND_PCM_READ_BITS:
2021 res = snd_pcm_oss_get_format(pcm_oss_file);
2022 if (res < 0)
2023 return res;
2024 return put_user(res, p);
2025 case SNDCTL_DSP_CHANNELS:
2026 if (get_user(res, p))
2027 return -EFAULT;
2028 res = snd_pcm_oss_set_channels(pcm_oss_file, res);
2029 if (res < 0)
2030 return res;
2031 return put_user(res, p);
2032 case SOUND_PCM_READ_CHANNELS:
2033 res = snd_pcm_oss_get_channels(pcm_oss_file);
2034 if (res < 0)
2035 return res;
2036 return put_user(res, p);
2037 case SOUND_PCM_WRITE_FILTER:
2038 case SOUND_PCM_READ_FILTER:
2039 return -EIO;
2040 case SNDCTL_DSP_POST:
2041 return snd_pcm_oss_post(pcm_oss_file);
2042 case SNDCTL_DSP_SUBDIVIDE:
2043 if (get_user(res, p))
2044 return -EFAULT;
2045 res = snd_pcm_oss_set_subdivide(pcm_oss_file, res);
2046 if (res < 0)
2047 return res;
2048 return put_user(res, p);
2049 case SNDCTL_DSP_SETFRAGMENT:
2050 if (get_user(res, p))
2051 return -EFAULT;
2052 return snd_pcm_oss_set_fragment(pcm_oss_file, res);
2053 case SNDCTL_DSP_GETFMTS:
2054 res = snd_pcm_oss_get_formats(pcm_oss_file);
2055 if (res < 0)
2056 return res;
2057 return put_user(res, p);
2058 case SNDCTL_DSP_GETOSPACE:
2059 case SNDCTL_DSP_GETISPACE:
2060 return snd_pcm_oss_get_space(pcm_oss_file,
2061 cmd == SNDCTL_DSP_GETISPACE ?
2062 SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK,
2063 (struct audio_buf_info __user *) arg);
2064 case SNDCTL_DSP_NONBLOCK:
2065 return snd_pcm_oss_nonblock(file);
2066 case SNDCTL_DSP_GETCAPS:
2067 res = snd_pcm_oss_get_caps(pcm_oss_file);
2068 if (res < 0)
2069 return res;
2070 return put_user(res, p);
2071 case SNDCTL_DSP_GETTRIGGER:
2072 res = snd_pcm_oss_get_trigger(pcm_oss_file);
2073 if (res < 0)
2074 return res;
2075 return put_user(res, p);
2076 case SNDCTL_DSP_SETTRIGGER:
2077 if (get_user(res, p))
2078 return -EFAULT;
2079 return snd_pcm_oss_set_trigger(pcm_oss_file, res);
2080 case SNDCTL_DSP_GETIPTR:
2081 case SNDCTL_DSP_GETOPTR:
2082 return snd_pcm_oss_get_ptr(pcm_oss_file,
2083 cmd == SNDCTL_DSP_GETIPTR ?
2084 SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK,
2085 (struct count_info __user *) arg);
2086 case SNDCTL_DSP_MAPINBUF:
2087 case SNDCTL_DSP_MAPOUTBUF:
2088 return snd_pcm_oss_get_mapbuf(pcm_oss_file,
2089 cmd == SNDCTL_DSP_MAPINBUF ?
2090 SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK,
2091 (struct buffmem_desc __user *) arg);
2092 case SNDCTL_DSP_SETSYNCRO:
2093 /* stop DMA now.. */
2094 return 0;
2095 case SNDCTL_DSP_SETDUPLEX:
2096 if (snd_pcm_oss_get_caps(pcm_oss_file) & DSP_CAP_DUPLEX)
2097 return 0;
2098 return -EIO;
2099 case SNDCTL_DSP_GETODELAY:
2100 res = snd_pcm_oss_get_odelay(pcm_oss_file);
2101 if (res < 0) {
2102 /* it's for sure, some broken apps don't check for error codes */
2103 put_user(0, p);
2104 return res;
2105 }
2106 return put_user(res, p);
2107 case SNDCTL_DSP_PROFILE:
2108 return 0; /* silently ignore */
2109 default:
2110 snd_printd("pcm_oss: unknown command = 0x%x\n", cmd);
2111 }
2112 return -EINVAL;
2113 }
2114
2115 #ifdef CONFIG_COMPAT
2116 /* all compatible */
2117 #define snd_pcm_oss_ioctl_compat snd_pcm_oss_ioctl
2118 #else
2119 #define snd_pcm_oss_ioctl_compat NULL
2120 #endif
2121
2122 static ssize_t snd_pcm_oss_read(struct file *file, char __user *buf, size_t count, loff_t *offset)
2123 {
2124 struct snd_pcm_oss_file *pcm_oss_file;
2125 struct snd_pcm_substream *substream;
2126
2127 pcm_oss_file = file->private_data;
2128 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
2129 if (substream == NULL)
2130 return -ENXIO;
2131 #ifndef OSS_DEBUG
2132 return snd_pcm_oss_read1(substream, buf, count);
2133 #else
2134 {
2135 ssize_t res = snd_pcm_oss_read1(substream, buf, count);
2136 printk("pcm_oss: read %li bytes (returned %li bytes)\n", (long)count, (long)res);
2137 return res;
2138 }
2139 #endif
2140 }
2141
2142 static ssize_t snd_pcm_oss_write(struct file *file, const char __user *buf, size_t count, loff_t *offset)
2143 {
2144 struct snd_pcm_oss_file *pcm_oss_file;
2145 struct snd_pcm_substream *substream;
2146 long result;
2147
2148 pcm_oss_file = file->private_data;
2149 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
2150 if (substream == NULL)
2151 return -ENXIO;
2152 result = snd_pcm_oss_write1(substream, buf, count);
2153 #ifdef OSS_DEBUG
2154 printk("pcm_oss: write %li bytes (wrote %li bytes)\n", (long)count, (long)result);
2155 #endif
2156 return result;
2157 }
2158
2159 static int snd_pcm_oss_playback_ready(struct snd_pcm_substream *substream)
2160 {
2161 struct snd_pcm_runtime *runtime = substream->runtime;
2162 if (atomic_read(&runtime->mmap_count))
2163 return runtime->oss.prev_hw_ptr_interrupt != runtime->hw_ptr_interrupt;
2164 else
2165 return snd_pcm_playback_avail(runtime) >= runtime->oss.period_frames;
2166 }
2167
2168 static int snd_pcm_oss_capture_ready(struct snd_pcm_substream *substream)
2169 {
2170 struct snd_pcm_runtime *runtime = substream->runtime;
2171 if (atomic_read(&runtime->mmap_count))
2172 return runtime->oss.prev_hw_ptr_interrupt != runtime->hw_ptr_interrupt;
2173 else
2174 return snd_pcm_capture_avail(runtime) >= runtime->oss.period_frames;
2175 }
2176
2177 static unsigned int snd_pcm_oss_poll(struct file *file, poll_table * wait)
2178 {
2179 struct snd_pcm_oss_file *pcm_oss_file;
2180 unsigned int mask;
2181 struct snd_pcm_substream *psubstream = NULL, *csubstream = NULL;
2182
2183 pcm_oss_file = file->private_data;
2184
2185 psubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
2186 csubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
2187
2188 mask = 0;
2189 if (psubstream != NULL) {
2190 struct snd_pcm_runtime *runtime = psubstream->runtime;
2191 poll_wait(file, &runtime->sleep, wait);
2192 snd_pcm_stream_lock_irq(psubstream);
2193 if (runtime->status->state != SNDRV_PCM_STATE_DRAINING &&
2194 (runtime->status->state != SNDRV_PCM_STATE_RUNNING ||
2195 snd_pcm_oss_playback_ready(psubstream)))
2196 mask |= POLLOUT | POLLWRNORM;
2197 snd_pcm_stream_unlock_irq(psubstream);
2198 }
2199 if (csubstream != NULL) {
2200 struct snd_pcm_runtime *runtime = csubstream->runtime;
2201 snd_pcm_state_t ostate;
2202 poll_wait(file, &runtime->sleep, wait);
2203 snd_pcm_stream_lock_irq(csubstream);
2204 if ((ostate = runtime->status->state) != SNDRV_PCM_STATE_RUNNING ||
2205 snd_pcm_oss_capture_ready(csubstream))
2206 mask |= POLLIN | POLLRDNORM;
2207 snd_pcm_stream_unlock_irq(csubstream);
2208 if (ostate != SNDRV_PCM_STATE_RUNNING && runtime->oss.trigger) {
2209 struct snd_pcm_oss_file ofile;
2210 memset(&ofile, 0, sizeof(ofile));
2211 ofile.streams[SNDRV_PCM_STREAM_CAPTURE] = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
2212 runtime->oss.trigger = 0;
2213 snd_pcm_oss_set_trigger(&ofile, PCM_ENABLE_INPUT);
2214 }
2215 }
2216
2217 return mask;
2218 }
2219
2220 static int snd_pcm_oss_mmap(struct file *file, struct vm_area_struct *area)
2221 {
2222 struct snd_pcm_oss_file *pcm_oss_file;
2223 struct snd_pcm_substream *substream = NULL;
2224 struct snd_pcm_runtime *runtime;
2225 int err;
2226
2227 #ifdef OSS_DEBUG
2228 printk("pcm_oss: mmap begin\n");
2229 #endif
2230 pcm_oss_file = file->private_data;
2231 switch ((area->vm_flags & (VM_READ | VM_WRITE))) {
2232 case VM_READ | VM_WRITE:
2233 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
2234 if (substream)
2235 break;
2236 /* Fall through */
2237 case VM_READ:
2238 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
2239 break;
2240 case VM_WRITE:
2241 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
2242 break;
2243 default:
2244 return -EINVAL;
2245 }
2246 /* set VM_READ access as well to fix memset() routines that do
2247 reads before writes (to improve performance) */
2248 area->vm_flags |= VM_READ;
2249 if (substream == NULL)
2250 return -ENXIO;
2251 runtime = substream->runtime;
2252 if (!(runtime->info & SNDRV_PCM_INFO_MMAP_VALID))
2253 return -EIO;
2254 if (runtime->info & SNDRV_PCM_INFO_INTERLEAVED)
2255 runtime->access = SNDRV_PCM_ACCESS_MMAP_INTERLEAVED;
2256 else
2257 return -EIO;
2258
2259 if (runtime->oss.params) {
2260 if ((err = snd_pcm_oss_change_params(substream)) < 0)
2261 return err;
2262 }
2263 #ifdef CONFIG_SND_PCM_OSS_PLUGINS
2264 if (runtime->oss.plugin_first != NULL)
2265 return -EIO;
2266 #endif
2267
2268 if (area->vm_pgoff != 0)
2269 return -EINVAL;
2270
2271 err = snd_pcm_mmap_data(substream, file, area);
2272 if (err < 0)
2273 return err;
2274 runtime->oss.mmap_bytes = area->vm_end - area->vm_start;
2275 runtime->silence_threshold = 0;
2276 runtime->silence_size = 0;
2277 #ifdef OSS_DEBUG
2278 printk("pcm_oss: mmap ok, bytes = 0x%x\n", runtime->oss.mmap_bytes);
2279 #endif
2280 /* In mmap mode we never stop */
2281 runtime->stop_threshold = runtime->boundary;
2282
2283 return 0;
2284 }
2285
2286 #ifdef CONFIG_PROC_FS
2287 /*
2288 * /proc interface
2289 */
2290
2291 static void snd_pcm_oss_proc_read(struct snd_info_entry *entry,
2292 struct snd_info_buffer *buffer)
2293 {
2294 struct snd_pcm_str *pstr = entry->private_data;
2295 struct snd_pcm_oss_setup *setup = pstr->oss.setup_list;
2296 mutex_lock(&pstr->oss.setup_mutex);
2297 while (setup) {
2298 snd_iprintf(buffer, "%s %u %u%s%s%s%s%s%s\n",
2299 setup->task_name,
2300 setup->periods,
2301 setup->period_size,
2302 setup->disable ? " disable" : "",
2303 setup->direct ? " direct" : "",
2304 setup->block ? " block" : "",
2305 setup->nonblock ? " non-block" : "",
2306 setup->partialfrag ? " partial-frag" : "",
2307 setup->nosilence ? " no-silence" : "");
2308 setup = setup->next;
2309 }
2310 mutex_unlock(&pstr->oss.setup_mutex);
2311 }
2312
2313 static void snd_pcm_oss_proc_free_setup_list(struct snd_pcm_str * pstr)
2314 {
2315 unsigned int idx;
2316 struct snd_pcm_substream *substream;
2317 struct snd_pcm_oss_setup *setup, *setupn;
2318
2319 for (idx = 0, substream = pstr->substream;
2320 idx < pstr->substream_count; idx++, substream = substream->next)
2321 substream->oss.setup = NULL;
2322 for (setup = pstr->oss.setup_list, pstr->oss.setup_list = NULL;
2323 setup; setup = setupn) {
2324 setupn = setup->next;
2325 kfree(setup->task_name);
2326 kfree(setup);
2327 }
2328 pstr->oss.setup_list = NULL;
2329 }
2330
2331 static void snd_pcm_oss_proc_write(struct snd_info_entry *entry,
2332 struct snd_info_buffer *buffer)
2333 {
2334 struct snd_pcm_str *pstr = entry->private_data;
2335 char line[128], str[32], task_name[32], *ptr;
2336 int idx1;
2337 struct snd_pcm_oss_setup *setup, *setup1, template;
2338
2339 while (!snd_info_get_line(buffer, line, sizeof(line))) {
2340 mutex_lock(&pstr->oss.setup_mutex);
2341 memset(&template, 0, sizeof(template));
2342 ptr = snd_info_get_str(task_name, line, sizeof(task_name));
2343 if (!strcmp(task_name, "clear") || !strcmp(task_name, "erase")) {
2344 snd_pcm_oss_proc_free_setup_list(pstr);
2345 mutex_unlock(&pstr->oss.setup_mutex);
2346 continue;
2347 }
2348 for (setup = pstr->oss.setup_list; setup; setup = setup->next) {
2349 if (!strcmp(setup->task_name, task_name)) {
2350 template = *setup;
2351 break;
2352 }
2353 }
2354 ptr = snd_info_get_str(str, ptr, sizeof(str));
2355 template.periods = simple_strtoul(str, NULL, 10);
2356 ptr = snd_info_get_str(str, ptr, sizeof(str));
2357 template.period_size = simple_strtoul(str, NULL, 10);
2358 for (idx1 = 31; idx1 >= 0; idx1--)
2359 if (template.period_size & (1 << idx1))
2360 break;
2361 for (idx1--; idx1 >= 0; idx1--)
2362 template.period_size &= ~(1 << idx1);
2363 do {
2364 ptr = snd_info_get_str(str, ptr, sizeof(str));
2365 if (!strcmp(str, "disable")) {
2366 template.disable = 1;
2367 } else if (!strcmp(str, "direct")) {
2368 template.direct = 1;
2369 } else if (!strcmp(str, "block")) {
2370 template.block = 1;
2371 } else if (!strcmp(str, "non-block")) {
2372 template.nonblock = 1;
2373 } else if (!strcmp(str, "partial-frag")) {
2374 template.partialfrag = 1;
2375 } else if (!strcmp(str, "no-silence")) {
2376 template.nosilence = 1;
2377 } else if (!strcmp(str, "buggy-ptr")) {
2378 template.buggyptr = 1;
2379 }
2380 } while (*str);
2381 if (setup == NULL) {
2382 setup = kmalloc(sizeof(struct snd_pcm_oss_setup), GFP_KERNEL);
2383 if (setup) {
2384 if (pstr->oss.setup_list == NULL) {
2385 pstr->oss.setup_list = setup;
2386 } else {
2387 for (setup1 = pstr->oss.setup_list; setup1->next; setup1 = setup1->next);
2388 setup1->next = setup;
2389 }
2390 template.task_name = kstrdup(task_name, GFP_KERNEL);
2391 } else {
2392 buffer->error = -ENOMEM;
2393 }
2394 }
2395 if (setup)
2396 *setup = template;
2397 mutex_unlock(&pstr->oss.setup_mutex);
2398 }
2399 }
2400
2401 static void snd_pcm_oss_proc_init(struct snd_pcm *pcm)
2402 {
2403 int stream;
2404 for (stream = 0; stream < 2; ++stream) {
2405 struct snd_info_entry *entry;
2406 struct snd_pcm_str *pstr = &pcm->streams[stream];
2407 if (pstr->substream_count == 0)
2408 continue;
2409 if ((entry = snd_info_create_card_entry(pcm->card, "oss", pstr->proc_root)) != NULL) {
2410 entry->content = SNDRV_INFO_CONTENT_TEXT;
2411 entry->mode = S_IFREG | S_IRUGO | S_IWUSR;
2412 entry->c.text.read_size = 8192;
2413 entry->c.text.read = snd_pcm_oss_proc_read;
2414 entry->c.text.write_size = 8192;
2415 entry->c.text.write = snd_pcm_oss_proc_write;
2416 entry->private_data = pstr;
2417 if (snd_info_register(entry) < 0) {
2418 snd_info_free_entry(entry);
2419 entry = NULL;
2420 }
2421 }
2422 pstr->oss.proc_entry = entry;
2423 }
2424 }
2425
2426 static void snd_pcm_oss_proc_done(struct snd_pcm *pcm)
2427 {
2428 int stream;
2429 for (stream = 0; stream < 2; ++stream) {
2430 struct snd_pcm_str *pstr = &pcm->streams[stream];
2431 if (pstr->oss.proc_entry) {
2432 snd_info_unregister(pstr->oss.proc_entry);
2433 pstr->oss.proc_entry = NULL;
2434 snd_pcm_oss_proc_free_setup_list(pstr);
2435 }
2436 }
2437 }
2438 #else /* !CONFIG_PROC_FS */
2439 #define snd_pcm_oss_proc_init(pcm)
2440 #define snd_pcm_oss_proc_done(pcm)
2441 #endif /* CONFIG_PROC_FS */
2442
2443 /*
2444 * ENTRY functions
2445 */
2446
2447 static struct file_operations snd_pcm_oss_f_reg =
2448 {
2449 .owner = THIS_MODULE,
2450 .read = snd_pcm_oss_read,
2451 .write = snd_pcm_oss_write,
2452 .open = snd_pcm_oss_open,
2453 .release = snd_pcm_oss_release,
2454 .poll = snd_pcm_oss_poll,
2455 .unlocked_ioctl = snd_pcm_oss_ioctl,
2456 .compat_ioctl = snd_pcm_oss_ioctl_compat,
2457 .mmap = snd_pcm_oss_mmap,
2458 };
2459
2460 static void register_oss_dsp(struct snd_pcm *pcm, int index)
2461 {
2462 char name[128];
2463 sprintf(name, "dsp%i%i", pcm->card->number, pcm->device);
2464 if (snd_register_oss_device(SNDRV_OSS_DEVICE_TYPE_PCM,
2465 pcm->card, index, &snd_pcm_oss_f_reg,
2466 pcm, name) < 0) {
2467 snd_printk(KERN_ERR "unable to register OSS PCM device %i:%i\n",
2468 pcm->card->number, pcm->device);
2469 }
2470 }
2471
2472 static int snd_pcm_oss_register_minor(struct snd_pcm *pcm)
2473 {
2474 pcm->oss.reg = 0;
2475 if (dsp_map[pcm->card->number] == (int)pcm->device) {
2476 char name[128];
2477 int duplex;
2478 register_oss_dsp(pcm, 0);
2479 duplex = (pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream_count > 0 &&
2480 pcm->streams[SNDRV_PCM_STREAM_CAPTURE].substream_count &&
2481 !(pcm->info_flags & SNDRV_PCM_INFO_HALF_DUPLEX));
2482 sprintf(name, "%s%s", pcm->name, duplex ? " (DUPLEX)" : "");
2483 #ifdef SNDRV_OSS_INFO_DEV_AUDIO
2484 snd_oss_info_register(SNDRV_OSS_INFO_DEV_AUDIO,
2485 pcm->card->number,
2486 name);
2487 #endif
2488 pcm->oss.reg++;
2489 pcm->oss.reg_mask |= 1;
2490 }
2491 if (adsp_map[pcm->card->number] == (int)pcm->device) {
2492 register_oss_dsp(pcm, 1);
2493 pcm->oss.reg++;
2494 pcm->oss.reg_mask |= 2;
2495 }
2496
2497 if (pcm->oss.reg)
2498 snd_pcm_oss_proc_init(pcm);
2499
2500 return 0;
2501 }
2502
2503 static int snd_pcm_oss_disconnect_minor(struct snd_pcm *pcm)
2504 {
2505 if (pcm->oss.reg) {
2506 if (pcm->oss.reg_mask & 1) {
2507 pcm->oss.reg_mask &= ~1;
2508 snd_unregister_oss_device(SNDRV_OSS_DEVICE_TYPE_PCM,
2509 pcm->card, 0);
2510 }
2511 if (pcm->oss.reg_mask & 2) {
2512 pcm->oss.reg_mask &= ~2;
2513 snd_unregister_oss_device(SNDRV_OSS_DEVICE_TYPE_PCM,
2514 pcm->card, 1);
2515 }
2516 }
2517 return 0;
2518 }
2519
2520 static int snd_pcm_oss_unregister_minor(struct snd_pcm *pcm)
2521 {
2522 snd_pcm_oss_disconnect_minor(pcm);
2523 if (pcm->oss.reg) {
2524 if (dsp_map[pcm->card->number] == (int)pcm->device) {
2525 #ifdef SNDRV_OSS_INFO_DEV_AUDIO
2526 snd_oss_info_unregister(SNDRV_OSS_INFO_DEV_AUDIO, pcm->card->number);
2527 #endif
2528 }
2529 pcm->oss.reg = 0;
2530 snd_pcm_oss_proc_done(pcm);
2531 }
2532 return 0;
2533 }
2534
2535 static struct snd_pcm_notify snd_pcm_oss_notify =
2536 {
2537 .n_register = snd_pcm_oss_register_minor,
2538 .n_disconnect = snd_pcm_oss_disconnect_minor,
2539 .n_unregister = snd_pcm_oss_unregister_minor,
2540 };
2541
2542 static int __init alsa_pcm_oss_init(void)
2543 {
2544 int i;
2545 int err;
2546
2547 /* check device map table */
2548 for (i = 0; i < SNDRV_CARDS; i++) {
2549 if (dsp_map[i] < 0 || dsp_map[i] >= SNDRV_PCM_DEVICES) {
2550 snd_printk(KERN_ERR "invalid dsp_map[%d] = %d\n",
2551 i, dsp_map[i]);
2552 dsp_map[i] = 0;
2553 }
2554 if (adsp_map[i] < 0 || adsp_map[i] >= SNDRV_PCM_DEVICES) {
2555 snd_printk(KERN_ERR "invalid adsp_map[%d] = %d\n",
2556 i, adsp_map[i]);
2557 adsp_map[i] = 1;
2558 }
2559 }
2560 if ((err = snd_pcm_notify(&snd_pcm_oss_notify, 0)) < 0)
2561 return err;
2562 return 0;
2563 }
2564
2565 static void __exit alsa_pcm_oss_exit(void)
2566 {
2567 snd_pcm_notify(&snd_pcm_oss_notify, 1);
2568 }
2569
2570 module_init(alsa_pcm_oss_init)
2571 module_exit(alsa_pcm_oss_exit)
kernel source for telekom puls (alcatel/mediatek)