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[ALSA] Fix / clean up PCM-OSS setup hooks
[linux-2.6/kvm.git] / sound / core / oss / pcm_oss.c
blob91114c7aeff5aa29c6c65375fda770f19425b381
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.period_size > 16)
212 oss_period_size = substream->oss.setup.period_size;
213 else if (runtime->oss.fragshift) {
214 oss_period_size = 1 << runtime->oss.fragshift;
215 if (oss_period_size > oss_buffer_size / 2)
216 oss_period_size = oss_buffer_size / 2;
217 } else {
218 int sd;
219 size_t bytes_per_sec = params_rate(oss_params) * snd_pcm_format_physical_width(params_format(oss_params)) * params_channels(oss_params) / 8;
220
221 oss_period_size = oss_buffer_size;
222 do {
223 oss_period_size /= 2;
224 } while (oss_period_size > bytes_per_sec);
225 if (runtime->oss.subdivision == 0) {
226 sd = 4;
227 if (oss_period_size / sd > 4096)
228 sd *= 2;
229 if (oss_period_size / sd < 4096)
230 sd = 1;
231 } else
232 sd = runtime->oss.subdivision;
233 oss_period_size /= sd;
234 if (oss_period_size < 16)
235 oss_period_size = 16;
236 }
237
238 min_period_size = snd_pcm_plug_client_size(substream,
239 snd_pcm_hw_param_value_min(slave_params, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, NULL));
240 min_period_size *= oss_frame_size;
241 min_period_size = 1 << (ld2(min_period_size - 1) + 1);
242 if (oss_period_size < min_period_size)
243 oss_period_size = min_period_size;
244
245 max_period_size = snd_pcm_plug_client_size(substream,
246 snd_pcm_hw_param_value_max(slave_params, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, NULL));
247 max_period_size *= oss_frame_size;
248 max_period_size = 1 << ld2(max_period_size);
249 if (oss_period_size > max_period_size)
250 oss_period_size = max_period_size;
251
252 oss_periods = oss_buffer_size / oss_period_size;
253
254 if (substream->oss.setup.periods > 1)
255 oss_periods = substream->oss.setup.periods;
256
257 s = snd_pcm_hw_param_value_max(slave_params, SNDRV_PCM_HW_PARAM_PERIODS, NULL);
258 if (runtime->oss.maxfrags && s > runtime->oss.maxfrags)
259 s = runtime->oss.maxfrags;
260 if (oss_periods > s)
261 oss_periods = s;
262
263 s = snd_pcm_hw_param_value_min(slave_params, SNDRV_PCM_HW_PARAM_PERIODS, NULL);
264 if (s < 2)
265 s = 2;
266 if (oss_periods < s)
267 oss_periods = s;
268
269 while (oss_period_size * oss_periods > oss_buffer_size)
270 oss_period_size /= 2;
271
272 snd_assert(oss_period_size >= 16, return -EINVAL);
273 runtime->oss.period_bytes = oss_period_size;
274 runtime->oss.period_frames = 1;
275 runtime->oss.periods = oss_periods;
276 return 0;
277 }
278
279 static int choose_rate(struct snd_pcm_substream *substream,
280 struct snd_pcm_hw_params *params, unsigned int best_rate)
281 {
282 struct snd_interval *it;
283 struct snd_pcm_hw_params *save;
284 unsigned int rate, prev;
285
286 save = kmalloc(sizeof(*save), GFP_KERNEL);
287 if (save == NULL)
288 return -ENOMEM;
289 *save = *params;
290 it = hw_param_interval(save, SNDRV_PCM_HW_PARAM_RATE);
291
292 /* try multiples of the best rate */
293 rate = best_rate;
294 for (;;) {
295 if (it->max < rate || (it->max == rate && it->openmax))
296 break;
297 if (it->min < rate || (it->min == rate && !it->openmin)) {
298 int ret;
299 ret = snd_pcm_hw_param_set(substream, params,
300 SNDRV_PCM_HW_PARAM_RATE,
301 rate, 0);
302 if (ret == (int)rate) {
303 kfree(save);
304 return rate;
305 }
306 *params = *save;
307 }
308 prev = rate;
309 rate += best_rate;
310 if (rate <= prev)
311 break;
312 }
313
314 /* not found, use the nearest rate */
315 kfree(save);
316 return snd_pcm_hw_param_near(substream, params, SNDRV_PCM_HW_PARAM_RATE, best_rate, NULL);
317 }
318
319 static int snd_pcm_oss_change_params(struct snd_pcm_substream *substream)
320 {
321 struct snd_pcm_runtime *runtime = substream->runtime;
322 struct snd_pcm_hw_params *params, *sparams;
323 struct snd_pcm_sw_params *sw_params;
324 ssize_t oss_buffer_size, oss_period_size;
325 size_t oss_frame_size;
326 int err;
327 int direct;
328 int format, sformat, n;
329 struct snd_mask sformat_mask;
330 struct snd_mask mask;
331
332 sw_params = kmalloc(sizeof(*sw_params), GFP_KERNEL);
333 params = kmalloc(sizeof(*params), GFP_KERNEL);
334 sparams = kmalloc(sizeof(*sparams), GFP_KERNEL);
335 if (!sw_params || !params || !sparams) {
336 snd_printd("No memory\n");
337 err = -ENOMEM;
338 goto failure;
339 }
340
341 if (atomic_read(&runtime->mmap_count))
342 direct = 1;
343 else
344 direct = substream->oss.setup.direct;
345
346 _snd_pcm_hw_params_any(sparams);
347 _snd_pcm_hw_param_setinteger(sparams, SNDRV_PCM_HW_PARAM_PERIODS);
348 _snd_pcm_hw_param_min(sparams, SNDRV_PCM_HW_PARAM_PERIODS, 2, 0);
349 snd_mask_none(&mask);
350 if (atomic_read(&runtime->mmap_count))
351 snd_mask_set(&mask, SNDRV_PCM_ACCESS_MMAP_INTERLEAVED);
352 else {
353 snd_mask_set(&mask, SNDRV_PCM_ACCESS_RW_INTERLEAVED);
354 if (!direct)
355 snd_mask_set(&mask, SNDRV_PCM_ACCESS_RW_NONINTERLEAVED);
356 }
357 err = snd_pcm_hw_param_mask(substream, sparams, SNDRV_PCM_HW_PARAM_ACCESS, &mask);
358 if (err < 0) {
359 snd_printd("No usable accesses\n");
360 err = -EINVAL;
361 goto failure;
362 }
363 choose_rate(substream, sparams, runtime->oss.rate);
364 snd_pcm_hw_param_near(substream, sparams, SNDRV_PCM_HW_PARAM_CHANNELS, runtime->oss.channels, NULL);
365
366 format = snd_pcm_oss_format_from(runtime->oss.format);
367
368 sformat_mask = *hw_param_mask(sparams, SNDRV_PCM_HW_PARAM_FORMAT);
369 if (direct)
370 sformat = format;
371 else
372 sformat = snd_pcm_plug_slave_format(format, &sformat_mask);
373
374 if (sformat < 0 || !snd_mask_test(&sformat_mask, sformat)) {
375 for (sformat = 0; sformat <= SNDRV_PCM_FORMAT_LAST; sformat++) {
376 if (snd_mask_test(&sformat_mask, sformat) &&
377 snd_pcm_oss_format_to(sformat) >= 0)
378 break;
379 }
380 if (sformat > SNDRV_PCM_FORMAT_LAST) {
381 snd_printd("Cannot find a format!!!\n");
382 err = -EINVAL;
383 goto failure;
384 }
385 }
386 err = _snd_pcm_hw_param_set(sparams, SNDRV_PCM_HW_PARAM_FORMAT, sformat, 0);
387 snd_assert(err >= 0, goto failure);
388
389 if (direct) {
390 memcpy(params, sparams, sizeof(*params));
391 } else {
392 _snd_pcm_hw_params_any(params);
393 _snd_pcm_hw_param_set(params, SNDRV_PCM_HW_PARAM_ACCESS,
394 SNDRV_PCM_ACCESS_RW_INTERLEAVED, 0);
395 _snd_pcm_hw_param_set(params, SNDRV_PCM_HW_PARAM_FORMAT,
396 snd_pcm_oss_format_from(runtime->oss.format), 0);
397 _snd_pcm_hw_param_set(params, SNDRV_PCM_HW_PARAM_CHANNELS,
398 runtime->oss.channels, 0);
399 _snd_pcm_hw_param_set(params, SNDRV_PCM_HW_PARAM_RATE,
400 runtime->oss.rate, 0);
401 pdprintf("client: access = %i, format = %i, channels = %i, rate = %i\n",
402 params_access(params), params_format(params),
403 params_channels(params), params_rate(params));
404 }
405 pdprintf("slave: access = %i, format = %i, channels = %i, rate = %i\n",
406 params_access(sparams), params_format(sparams),
407 params_channels(sparams), params_rate(sparams));
408
409 oss_frame_size = snd_pcm_format_physical_width(params_format(params)) *
410 params_channels(params) / 8;
411
412 #ifdef CONFIG_SND_PCM_OSS_PLUGINS
413 snd_pcm_oss_plugin_clear(substream);
414 if (!direct) {
415 /* add necessary plugins */
416 snd_pcm_oss_plugin_clear(substream);
417 if ((err = snd_pcm_plug_format_plugins(substream,
418 params,
419 sparams)) < 0) {
420 snd_printd("snd_pcm_plug_format_plugins failed: %i\n", err);
421 snd_pcm_oss_plugin_clear(substream);
422 goto failure;
423 }
424 if (runtime->oss.plugin_first) {
425 struct snd_pcm_plugin *plugin;
426 if ((err = snd_pcm_plugin_build_io(substream, sparams, &plugin)) < 0) {
427 snd_printd("snd_pcm_plugin_build_io failed: %i\n", err);
428 snd_pcm_oss_plugin_clear(substream);
429 goto failure;
430 }
431 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
432 err = snd_pcm_plugin_append(plugin);
433 } else {
434 err = snd_pcm_plugin_insert(plugin);
435 }
436 if (err < 0) {
437 snd_pcm_oss_plugin_clear(substream);
438 goto failure;
439 }
440 }
441 }
442 #endif
443
444 err = snd_pcm_oss_period_size(substream, params, sparams);
445 if (err < 0)
446 goto failure;
447
448 n = snd_pcm_plug_slave_size(substream, runtime->oss.period_bytes / oss_frame_size);
449 err = snd_pcm_hw_param_near(substream, sparams, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, n, NULL);
450 snd_assert(err >= 0, goto failure);
451
452 err = snd_pcm_hw_param_near(substream, sparams, SNDRV_PCM_HW_PARAM_PERIODS,
453 runtime->oss.periods, NULL);
454 snd_assert(err >= 0, goto failure);
455
456 snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DROP, NULL);
457
458 if ((err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_HW_PARAMS, sparams)) < 0) {
459 snd_printd("HW_PARAMS failed: %i\n", err);
460 goto failure;
461 }
462
463 memset(sw_params, 0, sizeof(*sw_params));
464 if (runtime->oss.trigger) {
465 sw_params->start_threshold = 1;
466 } else {
467 sw_params->start_threshold = runtime->boundary;
468 }
469 if (atomic_read(&runtime->mmap_count) || substream->stream == SNDRV_PCM_STREAM_CAPTURE)
470 sw_params->stop_threshold = runtime->boundary;
471 else
472 sw_params->stop_threshold = runtime->buffer_size;
473 sw_params->tstamp_mode = SNDRV_PCM_TSTAMP_NONE;
474 sw_params->period_step = 1;
475 sw_params->sleep_min = 0;
476 sw_params->avail_min = substream->stream == SNDRV_PCM_STREAM_PLAYBACK ?
477 1 : runtime->period_size;
478 sw_params->xfer_align = 1;
479 if (atomic_read(&runtime->mmap_count) ||
480 substream->oss.setup.nosilence) {
481 sw_params->silence_threshold = 0;
482 sw_params->silence_size = 0;
483 } else {
484 snd_pcm_uframes_t frames;
485 frames = runtime->period_size + 16;
486 if (frames > runtime->buffer_size)
487 frames = runtime->buffer_size;
488 sw_params->silence_threshold = frames;
489 sw_params->silence_size = frames;
490 }
491
492 if ((err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_SW_PARAMS, sw_params)) < 0) {
493 snd_printd("SW_PARAMS failed: %i\n", err);
494 goto failure;
495 }
496
497 runtime->oss.periods = params_periods(sparams);
498 oss_period_size = snd_pcm_plug_client_size(substream, params_period_size(sparams));
499 snd_assert(oss_period_size >= 0, err = -EINVAL; goto failure);
500 #ifdef CONFIG_SND_PCM_OSS_PLUGINS
501 if (runtime->oss.plugin_first) {
502 err = snd_pcm_plug_alloc(substream, oss_period_size);
503 if (err < 0)
504 goto failure;
505 }
506 #endif
507 oss_period_size *= oss_frame_size;
508
509 oss_buffer_size = oss_period_size * runtime->oss.periods;
510 snd_assert(oss_buffer_size >= 0, err = -EINVAL; goto failure);
511
512 runtime->oss.period_bytes = oss_period_size;
513 runtime->oss.buffer_bytes = oss_buffer_size;
514
515 pdprintf("oss: period bytes = %i, buffer bytes = %i\n",
516 runtime->oss.period_bytes,
517 runtime->oss.buffer_bytes);
518 pdprintf("slave: period_size = %i, buffer_size = %i\n",
519 params_period_size(sparams),
520 params_buffer_size(sparams));
521
522 runtime->oss.format = snd_pcm_oss_format_to(params_format(params));
523 runtime->oss.channels = params_channels(params);
524 runtime->oss.rate = params_rate(params);
525
526 runtime->oss.params = 0;
527 runtime->oss.prepare = 1;
528 vfree(runtime->oss.buffer);
529 runtime->oss.buffer = vmalloc(runtime->oss.period_bytes);
530 runtime->oss.buffer_used = 0;
531 if (runtime->dma_area)
532 snd_pcm_format_set_silence(runtime->format, runtime->dma_area, bytes_to_samples(runtime, runtime->dma_bytes));
533
534 runtime->oss.period_frames = snd_pcm_alsa_frames(substream, oss_period_size);
535
536 err = 0;
537 failure:
538 kfree(sw_params);
539 kfree(params);
540 kfree(sparams);
541 return err;
542 }
543
544 static int snd_pcm_oss_get_active_substream(struct snd_pcm_oss_file *pcm_oss_file, struct snd_pcm_substream **r_substream)
545 {
546 int idx, err;
547 struct snd_pcm_substream *asubstream = NULL, *substream;
548
549 for (idx = 0; idx < 2; idx++) {
550 substream = pcm_oss_file->streams[idx];
551 if (substream == NULL)
552 continue;
553 if (asubstream == NULL)
554 asubstream = substream;
555 if (substream->runtime->oss.params) {
556 err = snd_pcm_oss_change_params(substream);
557 if (err < 0)
558 return err;
559 }
560 }
561 snd_assert(asubstream != NULL, return -EIO);
562 if (r_substream)
563 *r_substream = asubstream;
564 return 0;
565 }
566
567 static int snd_pcm_oss_prepare(struct snd_pcm_substream *substream)
568 {
569 int err;
570 struct snd_pcm_runtime *runtime = substream->runtime;
571
572 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_PREPARE, NULL);
573 if (err < 0) {
574 snd_printd("snd_pcm_oss_prepare: SNDRV_PCM_IOCTL_PREPARE failed\n");
575 return err;
576 }
577 runtime->oss.prepare = 0;
578 runtime->oss.prev_hw_ptr_interrupt = 0;
579 runtime->oss.period_ptr = 0;
580 runtime->oss.buffer_used = 0;
581
582 return 0;
583 }
584
585 static int snd_pcm_oss_make_ready(struct snd_pcm_substream *substream)
586 {
587 struct snd_pcm_runtime *runtime;
588 int err;
589
590 if (substream == NULL)
591 return 0;
592 runtime = substream->runtime;
593 if (runtime->oss.params) {
594 err = snd_pcm_oss_change_params(substream);
595 if (err < 0)
596 return err;
597 }
598 if (runtime->oss.prepare) {
599 err = snd_pcm_oss_prepare(substream);
600 if (err < 0)
601 return err;
602 }
603 return 0;
604 }
605
606 static int snd_pcm_oss_capture_position_fixup(struct snd_pcm_substream *substream, snd_pcm_sframes_t *delay)
607 {
608 struct snd_pcm_runtime *runtime;
609 snd_pcm_uframes_t frames;
610 int err = 0;
611
612 while (1) {
613 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DELAY, delay);
614 if (err < 0)
615 break;
616 runtime = substream->runtime;
617 if (*delay <= (snd_pcm_sframes_t)runtime->buffer_size)
618 break;
619 /* in case of overrun, skip whole periods like OSS/Linux driver does */
620 /* until avail(delay) <= buffer_size */
621 frames = (*delay - runtime->buffer_size) + runtime->period_size - 1;
622 frames /= runtime->period_size;
623 frames *= runtime->period_size;
624 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_FORWARD, &frames);
625 if (err < 0)
626 break;
627 }
628 return err;
629 }
630
631 snd_pcm_sframes_t snd_pcm_oss_write3(struct snd_pcm_substream *substream, const char *ptr, snd_pcm_uframes_t frames, int in_kernel)
632 {
633 struct snd_pcm_runtime *runtime = substream->runtime;
634 int ret;
635 while (1) {
636 if (runtime->status->state == SNDRV_PCM_STATE_XRUN ||
637 runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) {
638 #ifdef OSS_DEBUG
639 if (runtime->status->state == SNDRV_PCM_STATE_XRUN)
640 printk("pcm_oss: write: recovering from XRUN\n");
641 else
642 printk("pcm_oss: write: recovering from SUSPEND\n");
643 #endif
644 ret = snd_pcm_oss_prepare(substream);
645 if (ret < 0)
646 break;
647 }
648 if (in_kernel) {
649 mm_segment_t fs;
650 fs = snd_enter_user();
651 ret = snd_pcm_lib_write(substream, (void __user *)ptr, frames);
652 snd_leave_user(fs);
653 } else {
654 ret = snd_pcm_lib_write(substream, (void __user *)ptr, frames);
655 }
656 if (ret != -EPIPE && ret != -ESTRPIPE)
657 break;
658 /* test, if we can't store new data, because the stream */
659 /* has not been started */
660 if (runtime->status->state == SNDRV_PCM_STATE_PREPARED)
661 return -EAGAIN;
662 }
663 return ret;
664 }
665
666 snd_pcm_sframes_t snd_pcm_oss_read3(struct snd_pcm_substream *substream, char *ptr, snd_pcm_uframes_t frames, int in_kernel)
667 {
668 struct snd_pcm_runtime *runtime = substream->runtime;
669 snd_pcm_sframes_t delay;
670 int ret;
671 while (1) {
672 if (runtime->status->state == SNDRV_PCM_STATE_XRUN ||
673 runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) {
674 #ifdef OSS_DEBUG
675 if (runtime->status->state == SNDRV_PCM_STATE_XRUN)
676 printk("pcm_oss: read: recovering from XRUN\n");
677 else
678 printk("pcm_oss: read: recovering from SUSPEND\n");
679 #endif
680 ret = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DRAIN, NULL);
681 if (ret < 0)
682 break;
683 } else if (runtime->status->state == SNDRV_PCM_STATE_SETUP) {
684 ret = snd_pcm_oss_prepare(substream);
685 if (ret < 0)
686 break;
687 }
688 ret = snd_pcm_oss_capture_position_fixup(substream, &delay);
689 if (ret < 0)
690 break;
691 if (in_kernel) {
692 mm_segment_t fs;
693 fs = snd_enter_user();
694 ret = snd_pcm_lib_read(substream, (void __user *)ptr, frames);
695 snd_leave_user(fs);
696 } else {
697 ret = snd_pcm_lib_read(substream, (void __user *)ptr, frames);
698 }
699 if (ret == -EPIPE) {
700 if (runtime->status->state == SNDRV_PCM_STATE_DRAINING) {
701 ret = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DROP, NULL);
702 if (ret < 0)
703 break;
704 }
705 continue;
706 }
707 if (ret != -ESTRPIPE)
708 break;
709 }
710 return ret;
711 }
712
713 snd_pcm_sframes_t snd_pcm_oss_writev3(struct snd_pcm_substream *substream, void **bufs, snd_pcm_uframes_t frames, int in_kernel)
714 {
715 struct snd_pcm_runtime *runtime = substream->runtime;
716 int ret;
717 while (1) {
718 if (runtime->status->state == SNDRV_PCM_STATE_XRUN ||
719 runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) {
720 #ifdef OSS_DEBUG
721 if (runtime->status->state == SNDRV_PCM_STATE_XRUN)
722 printk("pcm_oss: writev: recovering from XRUN\n");
723 else
724 printk("pcm_oss: writev: recovering from SUSPEND\n");
725 #endif
726 ret = snd_pcm_oss_prepare(substream);
727 if (ret < 0)
728 break;
729 }
730 if (in_kernel) {
731 mm_segment_t fs;
732 fs = snd_enter_user();
733 ret = snd_pcm_lib_writev(substream, (void __user **)bufs, frames);
734 snd_leave_user(fs);
735 } else {
736 ret = snd_pcm_lib_writev(substream, (void __user **)bufs, frames);
737 }
738 if (ret != -EPIPE && ret != -ESTRPIPE)
739 break;
740
741 /* test, if we can't store new data, because the stream */
742 /* has not been started */
743 if (runtime->status->state == SNDRV_PCM_STATE_PREPARED)
744 return -EAGAIN;
745 }
746 return ret;
747 }
748
749 snd_pcm_sframes_t snd_pcm_oss_readv3(struct snd_pcm_substream *substream, void **bufs, snd_pcm_uframes_t frames, int in_kernel)
750 {
751 struct snd_pcm_runtime *runtime = substream->runtime;
752 int ret;
753 while (1) {
754 if (runtime->status->state == SNDRV_PCM_STATE_XRUN ||
755 runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) {
756 #ifdef OSS_DEBUG
757 if (runtime->status->state == SNDRV_PCM_STATE_XRUN)
758 printk("pcm_oss: readv: recovering from XRUN\n");
759 else
760 printk("pcm_oss: readv: recovering from SUSPEND\n");
761 #endif
762 ret = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DRAIN, NULL);
763 if (ret < 0)
764 break;
765 } else if (runtime->status->state == SNDRV_PCM_STATE_SETUP) {
766 ret = snd_pcm_oss_prepare(substream);
767 if (ret < 0)
768 break;
769 }
770 if (in_kernel) {
771 mm_segment_t fs;
772 fs = snd_enter_user();
773 ret = snd_pcm_lib_readv(substream, (void __user **)bufs, frames);
774 snd_leave_user(fs);
775 } else {
776 ret = snd_pcm_lib_readv(substream, (void __user **)bufs, frames);
777 }
778 if (ret != -EPIPE && ret != -ESTRPIPE)
779 break;
780 }
781 return ret;
782 }
783
784 static ssize_t snd_pcm_oss_write2(struct snd_pcm_substream *substream, const char *buf, size_t bytes, int in_kernel)
785 {
786 struct snd_pcm_runtime *runtime = substream->runtime;
787 snd_pcm_sframes_t frames, frames1;
788 #ifdef CONFIG_SND_PCM_OSS_PLUGINS
789 if (runtime->oss.plugin_first) {
790 struct snd_pcm_plugin_channel *channels;
791 size_t oss_frame_bytes = (runtime->oss.plugin_first->src_width * runtime->oss.plugin_first->src_format.channels) / 8;
792 if (!in_kernel) {
793 if (copy_from_user(runtime->oss.buffer, (const char __user *)buf, bytes))
794 return -EFAULT;
795 buf = runtime->oss.buffer;
796 }
797 frames = bytes / oss_frame_bytes;
798 frames1 = snd_pcm_plug_client_channels_buf(substream, (char *)buf, frames, &channels);
799 if (frames1 < 0)
800 return frames1;
801 frames1 = snd_pcm_plug_write_transfer(substream, channels, frames1);
802 if (frames1 <= 0)
803 return frames1;
804 bytes = frames1 * oss_frame_bytes;
805 } else
806 #endif
807 {
808 frames = bytes_to_frames(runtime, bytes);
809 frames1 = snd_pcm_oss_write3(substream, buf, frames, in_kernel);
810 if (frames1 <= 0)
811 return frames1;
812 bytes = frames_to_bytes(runtime, frames1);
813 }
814 return bytes;
815 }
816
817 static ssize_t snd_pcm_oss_write1(struct snd_pcm_substream *substream, const char __user *buf, size_t bytes)
818 {
819 size_t xfer = 0;
820 ssize_t tmp;
821 struct snd_pcm_runtime *runtime = substream->runtime;
822
823 if (atomic_read(&runtime->mmap_count))
824 return -ENXIO;
825
826 if ((tmp = snd_pcm_oss_make_ready(substream)) < 0)
827 return tmp;
828 while (bytes > 0) {
829 if (bytes < runtime->oss.period_bytes || runtime->oss.buffer_used > 0) {
830 tmp = bytes;
831 if (tmp + runtime->oss.buffer_used > runtime->oss.period_bytes)
832 tmp = runtime->oss.period_bytes - runtime->oss.buffer_used;
833 if (tmp > 0) {
834 if (copy_from_user(runtime->oss.buffer + runtime->oss.buffer_used, buf, tmp))
835 return xfer > 0 ? (snd_pcm_sframes_t)xfer : -EFAULT;
836 }
837 runtime->oss.buffer_used += tmp;
838 buf += tmp;
839 bytes -= tmp;
840 xfer += tmp;
841 if (substream->oss.setup.partialfrag ||
842 runtime->oss.buffer_used == runtime->oss.period_bytes) {
843 tmp = snd_pcm_oss_write2(substream, runtime->oss.buffer + runtime->oss.period_ptr,
844 runtime->oss.buffer_used - runtime->oss.period_ptr, 1);
845 if (tmp <= 0)
846 return xfer > 0 ? (snd_pcm_sframes_t)xfer : tmp;
847 runtime->oss.bytes += tmp;
848 runtime->oss.period_ptr += tmp;
849 runtime->oss.period_ptr %= runtime->oss.period_bytes;
850 if (runtime->oss.period_ptr == 0 ||
851 runtime->oss.period_ptr == runtime->oss.buffer_used)
852 runtime->oss.buffer_used = 0;
853 else if ((substream->ffile->f_flags & O_NONBLOCK) != 0)
854 return xfer > 0 ? xfer : -EAGAIN;
855 }
856 } else {
857 tmp = snd_pcm_oss_write2(substream,
858 (const char __force *)buf,
859 runtime->oss.period_bytes, 0);
860 if (tmp <= 0)
861 return xfer > 0 ? (snd_pcm_sframes_t)xfer : tmp;
862 runtime->oss.bytes += tmp;
863 buf += tmp;
864 bytes -= tmp;
865 xfer += tmp;
866 if ((substream->ffile->f_flags & O_NONBLOCK) != 0 &&
867 tmp != runtime->oss.period_bytes)
868 break;
869 }
870 }
871 return xfer;
872 }
873
874 static ssize_t snd_pcm_oss_read2(struct snd_pcm_substream *substream, char *buf, size_t bytes, int in_kernel)
875 {
876 struct snd_pcm_runtime *runtime = substream->runtime;
877 snd_pcm_sframes_t frames, frames1;
878 #ifdef CONFIG_SND_PCM_OSS_PLUGINS
879 char __user *final_dst = (char __user *)buf;
880 if (runtime->oss.plugin_first) {
881 struct snd_pcm_plugin_channel *channels;
882 size_t oss_frame_bytes = (runtime->oss.plugin_last->dst_width * runtime->oss.plugin_last->dst_format.channels) / 8;
883 if (!in_kernel)
884 buf = runtime->oss.buffer;
885 frames = bytes / oss_frame_bytes;
886 frames1 = snd_pcm_plug_client_channels_buf(substream, buf, frames, &channels);
887 if (frames1 < 0)
888 return frames1;
889 frames1 = snd_pcm_plug_read_transfer(substream, channels, frames1);
890 if (frames1 <= 0)
891 return frames1;
892 bytes = frames1 * oss_frame_bytes;
893 if (!in_kernel && copy_to_user(final_dst, buf, bytes))
894 return -EFAULT;
895 } else
896 #endif
897 {
898 frames = bytes_to_frames(runtime, bytes);
899 frames1 = snd_pcm_oss_read3(substream, buf, frames, in_kernel);
900 if (frames1 <= 0)
901 return frames1;
902 bytes = frames_to_bytes(runtime, frames1);
903 }
904 return bytes;
905 }
906
907 static ssize_t snd_pcm_oss_read1(struct snd_pcm_substream *substream, char __user *buf, size_t bytes)
908 {
909 size_t xfer = 0;
910 ssize_t tmp;
911 struct snd_pcm_runtime *runtime = substream->runtime;
912
913 if (atomic_read(&runtime->mmap_count))
914 return -ENXIO;
915
916 if ((tmp = snd_pcm_oss_make_ready(substream)) < 0)
917 return tmp;
918 while (bytes > 0) {
919 if (bytes < runtime->oss.period_bytes || runtime->oss.buffer_used > 0) {
920 if (runtime->oss.buffer_used == 0) {
921 tmp = snd_pcm_oss_read2(substream, runtime->oss.buffer, runtime->oss.period_bytes, 1);
922 if (tmp <= 0)
923 return xfer > 0 ? (snd_pcm_sframes_t)xfer : tmp;
924 runtime->oss.bytes += tmp;
925 runtime->oss.period_ptr = tmp;
926 runtime->oss.buffer_used = tmp;
927 }
928 tmp = bytes;
929 if ((size_t) tmp > runtime->oss.buffer_used)
930 tmp = runtime->oss.buffer_used;
931 if (copy_to_user(buf, runtime->oss.buffer + (runtime->oss.period_ptr - runtime->oss.buffer_used), tmp))
932 return xfer > 0 ? (snd_pcm_sframes_t)xfer : -EFAULT;
933 buf += tmp;
934 bytes -= tmp;
935 xfer += tmp;
936 runtime->oss.buffer_used -= tmp;
937 } else {
938 tmp = snd_pcm_oss_read2(substream, (char __force *)buf,
939 runtime->oss.period_bytes, 0);
940 if (tmp <= 0)
941 return xfer > 0 ? (snd_pcm_sframes_t)xfer : tmp;
942 runtime->oss.bytes += tmp;
943 buf += tmp;
944 bytes -= tmp;
945 xfer += tmp;
946 }
947 }
948 return xfer;
949 }
950
951 static int snd_pcm_oss_reset(struct snd_pcm_oss_file *pcm_oss_file)
952 {
953 struct snd_pcm_substream *substream;
954
955 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
956 if (substream != NULL) {
957 snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DROP, NULL);
958 substream->runtime->oss.prepare = 1;
959 }
960 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
961 if (substream != NULL) {
962 snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DROP, NULL);
963 substream->runtime->oss.prepare = 1;
964 }
965 return 0;
966 }
967
968 static int snd_pcm_oss_post(struct snd_pcm_oss_file *pcm_oss_file)
969 {
970 struct snd_pcm_substream *substream;
971 int err;
972
973 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
974 if (substream != NULL) {
975 if ((err = snd_pcm_oss_make_ready(substream)) < 0)
976 return err;
977 snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_START, NULL);
978 }
979 /* note: all errors from the start action are ignored */
980 /* OSS apps do not know, how to handle them */
981 return 0;
982 }
983
984 static int snd_pcm_oss_sync1(struct snd_pcm_substream *substream, size_t size)
985 {
986 struct snd_pcm_runtime *runtime;
987 ssize_t result = 0;
988 long res;
989 wait_queue_t wait;
990
991 runtime = substream->runtime;
992 init_waitqueue_entry(&wait, current);
993 add_wait_queue(&runtime->sleep, &wait);
994 #ifdef OSS_DEBUG
995 printk("sync1: size = %li\n", size);
996 #endif
997 while (1) {
998 result = snd_pcm_oss_write2(substream, runtime->oss.buffer, size, 1);
999 if (result > 0) {
1000 runtime->oss.buffer_used = 0;
1001 result = 0;
1002 break;
1003 }
1004 if (result != 0 && result != -EAGAIN)
1005 break;
1006 result = 0;
1007 set_current_state(TASK_INTERRUPTIBLE);
1008 snd_pcm_stream_lock_irq(substream);
1009 res = runtime->status->state;
1010 snd_pcm_stream_unlock_irq(substream);
1011 if (res != SNDRV_PCM_STATE_RUNNING) {
1012 set_current_state(TASK_RUNNING);
1013 break;
1014 }
1015 res = schedule_timeout(10 * HZ);
1016 if (signal_pending(current)) {
1017 result = -ERESTARTSYS;
1018 break;
1019 }
1020 if (res == 0) {
1021 snd_printk(KERN_ERR "OSS sync error - DMA timeout\n");
1022 result = -EIO;
1023 break;
1024 }
1025 }
1026 remove_wait_queue(&runtime->sleep, &wait);
1027 return result;
1028 }
1029
1030 static int snd_pcm_oss_sync(struct snd_pcm_oss_file *pcm_oss_file)
1031 {
1032 int err = 0;
1033 unsigned int saved_f_flags;
1034 struct snd_pcm_substream *substream;
1035 struct snd_pcm_runtime *runtime;
1036 snd_pcm_format_t format;
1037 unsigned long width;
1038 size_t size;
1039
1040 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
1041 if (substream != NULL) {
1042 runtime = substream->runtime;
1043 if (atomic_read(&runtime->mmap_count))
1044 goto __direct;
1045 if ((err = snd_pcm_oss_make_ready(substream)) < 0)
1046 return err;
1047 format = snd_pcm_oss_format_from(runtime->oss.format);
1048 width = snd_pcm_format_physical_width(format);
1049 if (runtime->oss.buffer_used > 0) {
1050 #ifdef OSS_DEBUG
1051 printk("sync: buffer_used\n");
1052 #endif
1053 size = (8 * (runtime->oss.period_bytes - runtime->oss.buffer_used) + 7) / width;
1054 snd_pcm_format_set_silence(format,
1055 runtime->oss.buffer + runtime->oss.buffer_used,
1056 size);
1057 err = snd_pcm_oss_sync1(substream, runtime->oss.period_bytes);
1058 if (err < 0)
1059 return err;
1060 } else if (runtime->oss.period_ptr > 0) {
1061 #ifdef OSS_DEBUG
1062 printk("sync: period_ptr\n");
1063 #endif
1064 size = runtime->oss.period_bytes - runtime->oss.period_ptr;
1065 snd_pcm_format_set_silence(format,
1066 runtime->oss.buffer,
1067 size * 8 / width);
1068 err = snd_pcm_oss_sync1(substream, size);
1069 if (err < 0)
1070 return err;
1071 }
1072 /*
1073 * The ALSA's period might be a bit large than OSS one.
1074 * Fill the remain portion of ALSA period with zeros.
1075 */
1076 size = runtime->control->appl_ptr % runtime->period_size;
1077 if (size > 0) {
1078 size = runtime->period_size - size;
1079 if (runtime->access == SNDRV_PCM_ACCESS_RW_INTERLEAVED) {
1080 size = (runtime->frame_bits * size) / 8;
1081 while (size > 0) {
1082 mm_segment_t fs;
1083 size_t size1 = size < runtime->oss.period_bytes ? size : runtime->oss.period_bytes;
1084 size -= size1;
1085 size1 *= 8;
1086 size1 /= runtime->sample_bits;
1087 snd_pcm_format_set_silence(runtime->format,
1088 runtime->oss.buffer,
1089 size1);
1090 fs = snd_enter_user();
1091 snd_pcm_lib_write(substream, (void __user *)runtime->oss.buffer, size1);
1092 snd_leave_user(fs);
1093 }
1094 } else if (runtime->access == SNDRV_PCM_ACCESS_RW_NONINTERLEAVED) {
1095 void __user *buffers[runtime->channels];
1096 memset(buffers, 0, runtime->channels * sizeof(void *));
1097 snd_pcm_lib_writev(substream, buffers, size);
1098 }
1099 }
1100 /*
1101 * finish sync: drain the buffer
1102 */
1103 __direct:
1104 saved_f_flags = substream->ffile->f_flags;
1105 substream->ffile->f_flags &= ~O_NONBLOCK;
1106 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DRAIN, NULL);
1107 substream->ffile->f_flags = saved_f_flags;
1108 if (err < 0)
1109 return err;
1110 runtime->oss.prepare = 1;
1111 }
1112
1113 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
1114 if (substream != NULL) {
1115 if ((err = snd_pcm_oss_make_ready(substream)) < 0)
1116 return err;
1117 runtime = substream->runtime;
1118 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DROP, NULL);
1119 if (err < 0)
1120 return err;
1121 runtime->oss.buffer_used = 0;
1122 runtime->oss.prepare = 1;
1123 }
1124 return 0;
1125 }
1126
1127 static int snd_pcm_oss_set_rate(struct snd_pcm_oss_file *pcm_oss_file, int rate)
1128 {
1129 int idx;
1130
1131 for (idx = 1; idx >= 0; --idx) {
1132 struct snd_pcm_substream *substream = pcm_oss_file->streams[idx];
1133 struct snd_pcm_runtime *runtime;
1134 if (substream == NULL)
1135 continue;
1136 runtime = substream->runtime;
1137 if (rate < 1000)
1138 rate = 1000;
1139 else if (rate > 192000)
1140 rate = 192000;
1141 if (runtime->oss.rate != rate) {
1142 runtime->oss.params = 1;
1143 runtime->oss.rate = rate;
1144 }
1145 }
1146 return snd_pcm_oss_get_rate(pcm_oss_file);
1147 }
1148
1149 static int snd_pcm_oss_get_rate(struct snd_pcm_oss_file *pcm_oss_file)
1150 {
1151 struct snd_pcm_substream *substream;
1152 int err;
1153
1154 if ((err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream)) < 0)
1155 return err;
1156 return substream->runtime->oss.rate;
1157 }
1158
1159 static int snd_pcm_oss_set_channels(struct snd_pcm_oss_file *pcm_oss_file, unsigned int channels)
1160 {
1161 int idx;
1162 if (channels < 1)
1163 channels = 1;
1164 if (channels > 128)
1165 return -EINVAL;
1166 for (idx = 1; idx >= 0; --idx) {
1167 struct snd_pcm_substream *substream = pcm_oss_file->streams[idx];
1168 struct snd_pcm_runtime *runtime;
1169 if (substream == NULL)
1170 continue;
1171 runtime = substream->runtime;
1172 if (runtime->oss.channels != channels) {
1173 runtime->oss.params = 1;
1174 runtime->oss.channels = channels;
1175 }
1176 }
1177 return snd_pcm_oss_get_channels(pcm_oss_file);
1178 }
1179
1180 static int snd_pcm_oss_get_channels(struct snd_pcm_oss_file *pcm_oss_file)
1181 {
1182 struct snd_pcm_substream *substream;
1183 int err;
1184
1185 if ((err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream)) < 0)
1186 return err;
1187 return substream->runtime->oss.channels;
1188 }
1189
1190 static int snd_pcm_oss_get_block_size(struct snd_pcm_oss_file *pcm_oss_file)
1191 {
1192 struct snd_pcm_substream *substream;
1193 int err;
1194
1195 if ((err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream)) < 0)
1196 return err;
1197 return substream->runtime->oss.period_bytes;
1198 }
1199
1200 static int snd_pcm_oss_get_formats(struct snd_pcm_oss_file *pcm_oss_file)
1201 {
1202 struct snd_pcm_substream *substream;
1203 int err;
1204 int direct;
1205 struct snd_pcm_hw_params *params;
1206 unsigned int formats = 0;
1207 struct snd_mask format_mask;
1208 int fmt;
1209
1210 if ((err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream)) < 0)
1211 return err;
1212 if (atomic_read(&substream->runtime->mmap_count))
1213 direct = 1;
1214 else
1215 direct = substream->oss.setup.direct;
1216 if (!direct)
1217 return AFMT_MU_LAW | AFMT_U8 |
1218 AFMT_S16_LE | AFMT_S16_BE |
1219 AFMT_S8 | AFMT_U16_LE |
1220 AFMT_U16_BE;
1221 params = kmalloc(sizeof(*params), GFP_KERNEL);
1222 if (!params)
1223 return -ENOMEM;
1224 _snd_pcm_hw_params_any(params);
1225 err = snd_pcm_hw_refine(substream, params);
1226 format_mask = *hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT);
1227 kfree(params);
1228 snd_assert(err >= 0, return err);
1229 for (fmt = 0; fmt < 32; ++fmt) {
1230 if (snd_mask_test(&format_mask, fmt)) {
1231 int f = snd_pcm_oss_format_to(fmt);
1232 if (f >= 0)
1233 formats |= f;
1234 }
1235 }
1236 return formats;
1237 }
1238
1239 static int snd_pcm_oss_set_format(struct snd_pcm_oss_file *pcm_oss_file, int format)
1240 {
1241 int formats, idx;
1242
1243 if (format != AFMT_QUERY) {
1244 formats = snd_pcm_oss_get_formats(pcm_oss_file);
1245 if (!(formats & format))
1246 format = AFMT_U8;
1247 for (idx = 1; idx >= 0; --idx) {
1248 struct snd_pcm_substream *substream = pcm_oss_file->streams[idx];
1249 struct snd_pcm_runtime *runtime;
1250 if (substream == NULL)
1251 continue;
1252 runtime = substream->runtime;
1253 if (runtime->oss.format != format) {
1254 runtime->oss.params = 1;
1255 runtime->oss.format = format;
1256 }
1257 }
1258 }
1259 return snd_pcm_oss_get_format(pcm_oss_file);
1260 }
1261
1262 static int snd_pcm_oss_get_format(struct snd_pcm_oss_file *pcm_oss_file)
1263 {
1264 struct snd_pcm_substream *substream;
1265 int err;
1266
1267 if ((err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream)) < 0)
1268 return err;
1269 return substream->runtime->oss.format;
1270 }
1271
1272 static int snd_pcm_oss_set_subdivide1(struct snd_pcm_substream *substream, int subdivide)
1273 {
1274 struct snd_pcm_runtime *runtime;
1275
1276 if (substream == NULL)
1277 return 0;
1278 runtime = substream->runtime;
1279 if (subdivide == 0) {
1280 subdivide = runtime->oss.subdivision;
1281 if (subdivide == 0)
1282 subdivide = 1;
1283 return subdivide;
1284 }
1285 if (runtime->oss.subdivision || runtime->oss.fragshift)
1286 return -EINVAL;
1287 if (subdivide != 1 && subdivide != 2 && subdivide != 4 &&
1288 subdivide != 8 && subdivide != 16)
1289 return -EINVAL;
1290 runtime->oss.subdivision = subdivide;
1291 runtime->oss.params = 1;
1292 return subdivide;
1293 }
1294
1295 static int snd_pcm_oss_set_subdivide(struct snd_pcm_oss_file *pcm_oss_file, int subdivide)
1296 {
1297 int err = -EINVAL, idx;
1298
1299 for (idx = 1; idx >= 0; --idx) {
1300 struct snd_pcm_substream *substream = pcm_oss_file->streams[idx];
1301 if (substream == NULL)
1302 continue;
1303 if ((err = snd_pcm_oss_set_subdivide1(substream, subdivide)) < 0)
1304 return err;
1305 }
1306 return err;
1307 }
1308
1309 static int snd_pcm_oss_set_fragment1(struct snd_pcm_substream *substream, unsigned int val)
1310 {
1311 struct snd_pcm_runtime *runtime;
1312
1313 if (substream == NULL)
1314 return 0;
1315 runtime = substream->runtime;
1316 if (runtime->oss.subdivision || runtime->oss.fragshift)
1317 return -EINVAL;
1318 runtime->oss.fragshift = val & 0xffff;
1319 runtime->oss.maxfrags = (val >> 16) & 0xffff;
1320 if (runtime->oss.fragshift < 4) /* < 16 */
1321 runtime->oss.fragshift = 4;
1322 if (runtime->oss.maxfrags < 2)
1323 runtime->oss.maxfrags = 2;
1324 runtime->oss.params = 1;
1325 return 0;
1326 }
1327
1328 static int snd_pcm_oss_set_fragment(struct snd_pcm_oss_file *pcm_oss_file, unsigned int val)
1329 {
1330 int err = -EINVAL, idx;
1331
1332 for (idx = 1; idx >= 0; --idx) {
1333 struct snd_pcm_substream *substream = pcm_oss_file->streams[idx];
1334 if (substream == NULL)
1335 continue;
1336 if ((err = snd_pcm_oss_set_fragment1(substream, val)) < 0)
1337 return err;
1338 }
1339 return err;
1340 }
1341
1342 static int snd_pcm_oss_nonblock(struct file * file)
1343 {
1344 file->f_flags |= O_NONBLOCK;
1345 return 0;
1346 }
1347
1348 static int snd_pcm_oss_get_caps1(struct snd_pcm_substream *substream, int res)
1349 {
1350
1351 if (substream == NULL) {
1352 res &= ~DSP_CAP_DUPLEX;
1353 return res;
1354 }
1355 #ifdef DSP_CAP_MULTI
1356 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
1357 if (substream->pstr->substream_count > 1)
1358 res |= DSP_CAP_MULTI;
1359 #endif
1360 /* DSP_CAP_REALTIME is set all times: */
1361 /* all ALSA drivers can return actual pointer in ring buffer */
1362 #if defined(DSP_CAP_REALTIME) && 0
1363 {
1364 struct snd_pcm_runtime *runtime = substream->runtime;
1365 if (runtime->info & (SNDRV_PCM_INFO_BLOCK_TRANSFER|SNDRV_PCM_INFO_BATCH))
1366 res &= ~DSP_CAP_REALTIME;
1367 }
1368 #endif
1369 return res;
1370 }
1371
1372 static int snd_pcm_oss_get_caps(struct snd_pcm_oss_file *pcm_oss_file)
1373 {
1374 int result, idx;
1375
1376 result = DSP_CAP_TRIGGER | DSP_CAP_MMAP | DSP_CAP_DUPLEX | DSP_CAP_REALTIME;
1377 for (idx = 0; idx < 2; idx++) {
1378 struct snd_pcm_substream *substream = pcm_oss_file->streams[idx];
1379 result = snd_pcm_oss_get_caps1(substream, result);
1380 }
1381 result |= 0x0001; /* revision - same as SB AWE 64 */
1382 return result;
1383 }
1384
1385 static void snd_pcm_oss_simulate_fill(struct snd_pcm_substream *substream, snd_pcm_uframes_t hw_ptr)
1386 {
1387 struct snd_pcm_runtime *runtime = substream->runtime;
1388 snd_pcm_uframes_t appl_ptr;
1389 appl_ptr = hw_ptr + runtime->buffer_size;
1390 appl_ptr %= runtime->boundary;
1391 runtime->control->appl_ptr = appl_ptr;
1392 }
1393
1394 static int snd_pcm_oss_set_trigger(struct snd_pcm_oss_file *pcm_oss_file, int trigger)
1395 {
1396 struct snd_pcm_runtime *runtime;
1397 struct snd_pcm_substream *psubstream = NULL, *csubstream = NULL;
1398 int err, cmd;
1399
1400 #ifdef OSS_DEBUG
1401 printk("pcm_oss: trigger = 0x%x\n", trigger);
1402 #endif
1403
1404 psubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
1405 csubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
1406
1407 if (psubstream) {
1408 if ((err = snd_pcm_oss_make_ready(psubstream)) < 0)
1409 return err;
1410 }
1411 if (csubstream) {
1412 if ((err = snd_pcm_oss_make_ready(csubstream)) < 0)
1413 return err;
1414 }
1415 if (psubstream) {
1416 runtime = psubstream->runtime;
1417 if (trigger & PCM_ENABLE_OUTPUT) {
1418 if (runtime->oss.trigger)
1419 goto _skip1;
1420 if (atomic_read(&psubstream->runtime->mmap_count))
1421 snd_pcm_oss_simulate_fill(psubstream, runtime->hw_ptr_interrupt);
1422 runtime->oss.trigger = 1;
1423 runtime->start_threshold = 1;
1424 cmd = SNDRV_PCM_IOCTL_START;
1425 } else {
1426 if (!runtime->oss.trigger)
1427 goto _skip1;
1428 runtime->oss.trigger = 0;
1429 runtime->start_threshold = runtime->boundary;
1430 cmd = SNDRV_PCM_IOCTL_DROP;
1431 runtime->oss.prepare = 1;
1432 }
1433 err = snd_pcm_kernel_ioctl(psubstream, cmd, NULL);
1434 if (err < 0)
1435 return err;
1436 }
1437 _skip1:
1438 if (csubstream) {
1439 runtime = csubstream->runtime;
1440 if (trigger & PCM_ENABLE_INPUT) {
1441 if (runtime->oss.trigger)
1442 goto _skip2;
1443 runtime->oss.trigger = 1;
1444 runtime->start_threshold = 1;
1445 cmd = SNDRV_PCM_IOCTL_START;
1446 } else {
1447 if (!runtime->oss.trigger)
1448 goto _skip2;
1449 runtime->oss.trigger = 0;
1450 runtime->start_threshold = runtime->boundary;
1451 cmd = SNDRV_PCM_IOCTL_DROP;
1452 runtime->oss.prepare = 1;
1453 }
1454 err = snd_pcm_kernel_ioctl(csubstream, cmd, NULL);
1455 if (err < 0)
1456 return err;
1457 }
1458 _skip2:
1459 return 0;
1460 }
1461
1462 static int snd_pcm_oss_get_trigger(struct snd_pcm_oss_file *pcm_oss_file)
1463 {
1464 struct snd_pcm_substream *psubstream = NULL, *csubstream = NULL;
1465 int result = 0;
1466
1467 psubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
1468 csubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
1469 if (psubstream && psubstream->runtime && psubstream->runtime->oss.trigger)
1470 result |= PCM_ENABLE_OUTPUT;
1471 if (csubstream && csubstream->runtime && csubstream->runtime->oss.trigger)
1472 result |= PCM_ENABLE_INPUT;
1473 return result;
1474 }
1475
1476 static int snd_pcm_oss_get_odelay(struct snd_pcm_oss_file *pcm_oss_file)
1477 {
1478 struct snd_pcm_substream *substream;
1479 struct snd_pcm_runtime *runtime;
1480 snd_pcm_sframes_t delay;
1481 int err;
1482
1483 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
1484 if (substream == NULL)
1485 return -EINVAL;
1486 if ((err = snd_pcm_oss_make_ready(substream)) < 0)
1487 return err;
1488 runtime = substream->runtime;
1489 if (runtime->oss.params || runtime->oss.prepare)
1490 return 0;
1491 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DELAY, &delay);
1492 if (err == -EPIPE)
1493 delay = 0; /* hack for broken OSS applications */
1494 else if (err < 0)
1495 return err;
1496 return snd_pcm_oss_bytes(substream, delay);
1497 }
1498
1499 static int snd_pcm_oss_get_ptr(struct snd_pcm_oss_file *pcm_oss_file, int stream, struct count_info __user * _info)
1500 {
1501 struct snd_pcm_substream *substream;
1502 struct snd_pcm_runtime *runtime;
1503 snd_pcm_sframes_t delay;
1504 int fixup;
1505 struct count_info info;
1506 int err;
1507
1508 if (_info == NULL)
1509 return -EFAULT;
1510 substream = pcm_oss_file->streams[stream];
1511 if (substream == NULL)
1512 return -EINVAL;
1513 if ((err = snd_pcm_oss_make_ready(substream)) < 0)
1514 return err;
1515 runtime = substream->runtime;
1516 if (runtime->oss.params || runtime->oss.prepare) {
1517 memset(&info, 0, sizeof(info));
1518 if (copy_to_user(_info, &info, sizeof(info)))
1519 return -EFAULT;
1520 return 0;
1521 }
1522 if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
1523 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DELAY, &delay);
1524 if (err == -EPIPE || err == -ESTRPIPE || (! err && delay < 0)) {
1525 err = 0;
1526 delay = 0;
1527 fixup = 0;
1528 } else {
1529 fixup = runtime->oss.buffer_used;
1530 }
1531 } else {
1532 err = snd_pcm_oss_capture_position_fixup(substream, &delay);
1533 fixup = -runtime->oss.buffer_used;
1534 }
1535 if (err < 0)
1536 return err;
1537 info.ptr = snd_pcm_oss_bytes(substream, runtime->status->hw_ptr % runtime->buffer_size);
1538 if (atomic_read(&runtime->mmap_count)) {
1539 snd_pcm_sframes_t n;
1540 n = (delay = runtime->hw_ptr_interrupt) - runtime->oss.prev_hw_ptr_interrupt;
1541 if (n < 0)
1542 n += runtime->boundary;
1543 info.blocks = n / runtime->period_size;
1544 runtime->oss.prev_hw_ptr_interrupt = delay;
1545 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
1546 snd_pcm_oss_simulate_fill(substream, delay);
1547 info.bytes = snd_pcm_oss_bytes(substream, runtime->status->hw_ptr) & INT_MAX;
1548 } else {
1549 delay = snd_pcm_oss_bytes(substream, delay);
1550 if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
1551 if (substream->oss.setup.buggyptr)
1552 info.blocks = (runtime->oss.buffer_bytes - delay - fixup) / runtime->oss.period_bytes;
1553 else
1554 info.blocks = (delay + fixup) / runtime->oss.period_bytes;
1555 info.bytes = (runtime->oss.bytes - delay) & INT_MAX;
1556 } else {
1557 delay += fixup;
1558 info.blocks = delay / runtime->oss.period_bytes;
1559 info.bytes = (runtime->oss.bytes + delay) & INT_MAX;
1560 }
1561 }
1562 if (copy_to_user(_info, &info, sizeof(info)))
1563 return -EFAULT;
1564 return 0;
1565 }
1566
1567 static int snd_pcm_oss_get_space(struct snd_pcm_oss_file *pcm_oss_file, int stream, struct audio_buf_info __user *_info)
1568 {
1569 struct snd_pcm_substream *substream;
1570 struct snd_pcm_runtime *runtime;
1571 snd_pcm_sframes_t avail;
1572 int fixup;
1573 struct audio_buf_info info;
1574 int err;
1575
1576 if (_info == NULL)
1577 return -EFAULT;
1578 substream = pcm_oss_file->streams[stream];
1579 if (substream == NULL)
1580 return -EINVAL;
1581 runtime = substream->runtime;
1582
1583 if (runtime->oss.params &&
1584 (err = snd_pcm_oss_change_params(substream)) < 0)
1585 return err;
1586
1587 info.fragsize = runtime->oss.period_bytes;
1588 info.fragstotal = runtime->periods;
1589 if (runtime->oss.prepare) {
1590 if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
1591 info.bytes = runtime->oss.period_bytes * runtime->oss.periods;
1592 info.fragments = runtime->oss.periods;
1593 } else {
1594 info.bytes = 0;
1595 info.fragments = 0;
1596 }
1597 } else {
1598 if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
1599 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DELAY, &avail);
1600 if (err == -EPIPE || err == -ESTRPIPE || (! err && avail < 0)) {
1601 avail = runtime->buffer_size;
1602 err = 0;
1603 fixup = 0;
1604 } else {
1605 avail = runtime->buffer_size - avail;
1606 fixup = -runtime->oss.buffer_used;
1607 }
1608 } else {
1609 err = snd_pcm_oss_capture_position_fixup(substream, &avail);
1610 fixup = runtime->oss.buffer_used;
1611 }
1612 if (err < 0)
1613 return err;
1614 info.bytes = snd_pcm_oss_bytes(substream, avail) + fixup;
1615 info.fragments = info.bytes / runtime->oss.period_bytes;
1616 }
1617
1618 #ifdef OSS_DEBUG
1619 printk("pcm_oss: space: bytes = %i, fragments = %i, fragstotal = %i, fragsize = %i\n", info.bytes, info.fragments, info.fragstotal, info.fragsize);
1620 #endif
1621 if (copy_to_user(_info, &info, sizeof(info)))
1622 return -EFAULT;
1623 return 0;
1624 }
1625
1626 static int snd_pcm_oss_get_mapbuf(struct snd_pcm_oss_file *pcm_oss_file, int stream, struct buffmem_desc __user * _info)
1627 {
1628 // it won't be probably implemented
1629 // snd_printd("TODO: snd_pcm_oss_get_mapbuf\n");
1630 return -EINVAL;
1631 }
1632
1633 static const char *strip_task_path(const char *path)
1634 {
1635 const char *ptr, *ptrl = NULL;
1636 for (ptr = path; *ptr; ptr++) {
1637 if (*ptr == '/')
1638 ptrl = ptr + 1;
1639 }
1640 return ptrl;
1641 }
1642
1643 static void snd_pcm_oss_look_for_setup(struct snd_pcm *pcm, int stream,
1644 const char *task_name,
1645 struct snd_pcm_oss_setup *rsetup)
1646 {
1647 struct snd_pcm_oss_setup *setup;
1648
1649 mutex_lock(&pcm->streams[stream].oss.setup_mutex);
1650 do {
1651 for (setup = pcm->streams[stream].oss.setup_list; setup;
1652 setup = setup->next) {
1653 if (!strcmp(setup->task_name, task_name))
1654 goto out;
1655 }
1656 } while ((task_name = strip_task_path(task_name)) != NULL);
1657 out:
1658 if (setup)
1659 *rsetup = *setup;
1660 mutex_unlock(&pcm->streams[stream].oss.setup_mutex);
1661 }
1662
1663 static void snd_pcm_oss_release_substream(struct snd_pcm_substream *substream)
1664 {
1665 struct snd_pcm_runtime *runtime;
1666 runtime = substream->runtime;
1667 vfree(runtime->oss.buffer);
1668 runtime->oss.buffer = NULL;
1669 #ifdef CONFIG_SND_PCM_OSS_PLUGINS
1670 snd_pcm_oss_plugin_clear(substream);
1671 #endif
1672 substream->oss.oss = 0;
1673 }
1674
1675 static void snd_pcm_oss_init_substream(struct snd_pcm_substream *substream,
1676 struct snd_pcm_oss_setup *setup,
1677 int minor)
1678 {
1679 struct snd_pcm_runtime *runtime;
1680
1681 substream->oss.oss = 1;
1682 substream->oss.setup = *setup;
1683 if (setup->nonblock)
1684 substream->ffile->f_flags |= O_NONBLOCK;
1685 else
1686 substream->ffile->f_flags &= ~O_NONBLOCK;
1687 runtime = substream->runtime;
1688 runtime->oss.params = 1;
1689 runtime->oss.trigger = 1;
1690 runtime->oss.rate = 8000;
1691 switch (SNDRV_MINOR_OSS_DEVICE(minor)) {
1692 case SNDRV_MINOR_OSS_PCM_8:
1693 runtime->oss.format = AFMT_U8;
1694 break;
1695 case SNDRV_MINOR_OSS_PCM_16:
1696 runtime->oss.format = AFMT_S16_LE;
1697 break;
1698 default:
1699 runtime->oss.format = AFMT_MU_LAW;
1700 }
1701 runtime->oss.channels = 1;
1702 runtime->oss.fragshift = 0;
1703 runtime->oss.maxfrags = 0;
1704 runtime->oss.subdivision = 0;
1705 substream->pcm_release = snd_pcm_oss_release_substream;
1706 }
1707
1708 static int snd_pcm_oss_release_file(struct snd_pcm_oss_file *pcm_oss_file)
1709 {
1710 int cidx;
1711 snd_assert(pcm_oss_file != NULL, return -ENXIO);
1712 for (cidx = 0; cidx < 2; ++cidx) {
1713 struct snd_pcm_substream *substream = pcm_oss_file->streams[cidx];
1714 if (substream)
1715 snd_pcm_release_substream(substream);
1716 }
1717 kfree(pcm_oss_file);
1718 return 0;
1719 }
1720
1721 static int snd_pcm_oss_open_file(struct file *file,
1722 struct snd_pcm *pcm,
1723 struct snd_pcm_oss_file **rpcm_oss_file,
1724 int minor,
1725 struct snd_pcm_oss_setup *setup)
1726 {
1727 int idx, err;
1728 struct snd_pcm_oss_file *pcm_oss_file;
1729 struct snd_pcm_substream *substream;
1730 unsigned int f_mode = file->f_mode;
1731
1732 snd_assert(rpcm_oss_file != NULL, return -EINVAL);
1733 *rpcm_oss_file = NULL;
1734
1735 pcm_oss_file = kzalloc(sizeof(*pcm_oss_file), GFP_KERNEL);
1736 if (pcm_oss_file == NULL)
1737 return -ENOMEM;
1738
1739 if ((f_mode & (FMODE_WRITE|FMODE_READ)) == (FMODE_WRITE|FMODE_READ) &&
1740 (pcm->info_flags & SNDRV_PCM_INFO_HALF_DUPLEX))
1741 f_mode = FMODE_WRITE;
1742
1743 for (idx = 0; idx < 2; idx++) {
1744 if (setup[idx].disable)
1745 continue;
1746 if (idx == SNDRV_PCM_STREAM_PLAYBACK) {
1747 if (! (f_mode & FMODE_WRITE))
1748 continue;
1749 } else {
1750 if (! (f_mode & FMODE_READ))
1751 continue;
1752 }
1753 err = snd_pcm_open_substream(pcm, idx, file, &substream);
1754 if (err < 0) {
1755 snd_pcm_oss_release_file(pcm_oss_file);
1756 return err;
1757 }
1758
1759 pcm_oss_file->streams[idx] = substream;
1760 snd_pcm_oss_init_substream(substream, &setup[idx], minor);
1761 }
1762
1763 if (! pcm_oss_file->streams[0] && pcm_oss_file->streams[1]) {
1764 snd_pcm_oss_release_file(pcm_oss_file);
1765 return -EINVAL;
1766 }
1767
1768 file->private_data = pcm_oss_file;
1769 *rpcm_oss_file = pcm_oss_file;
1770 return 0;
1771 }
1772
1773
1774 static int snd_task_name(struct task_struct *task, char *name, size_t size)
1775 {
1776 unsigned int idx;
1777
1778 snd_assert(task != NULL && name != NULL && size >= 2, return -EINVAL);
1779 for (idx = 0; idx < sizeof(task->comm) && idx + 1 < size; idx++)
1780 name[idx] = task->comm[idx];
1781 name[idx] = '\0';
1782 return 0;
1783 }
1784
1785 static int snd_pcm_oss_open(struct inode *inode, struct file *file)
1786 {
1787 int err;
1788 char task_name[32];
1789 struct snd_pcm *pcm;
1790 struct snd_pcm_oss_file *pcm_oss_file;
1791 struct snd_pcm_oss_setup setup[2];
1792 int nonblock;
1793 wait_queue_t wait;
1794
1795 pcm = snd_lookup_oss_minor_data(iminor(inode),
1796 SNDRV_OSS_DEVICE_TYPE_PCM);
1797 if (pcm == NULL) {
1798 err = -ENODEV;
1799 goto __error1;
1800 }
1801 err = snd_card_file_add(pcm->card, file);
1802 if (err < 0)
1803 goto __error1;
1804 if (!try_module_get(pcm->card->module)) {
1805 err = -EFAULT;
1806 goto __error2;
1807 }
1808 if (snd_task_name(current, task_name, sizeof(task_name)) < 0) {
1809 err = -EFAULT;
1810 goto __error;
1811 }
1812 memset(setup, 0, sizeof(*setup));
1813 if (file->f_mode & FMODE_WRITE)
1814 snd_pcm_oss_look_for_setup(pcm, SNDRV_PCM_STREAM_PLAYBACK,
1815 task_name, &setup[0]);
1816 if (file->f_mode & FMODE_READ)
1817 snd_pcm_oss_look_for_setup(pcm, SNDRV_PCM_STREAM_CAPTURE,
1818 task_name, &setup[1]);
1819
1820 nonblock = !!(file->f_flags & O_NONBLOCK);
1821 if (!nonblock)
1822 nonblock = nonblock_open;
1823
1824 init_waitqueue_entry(&wait, current);
1825 add_wait_queue(&pcm->open_wait, &wait);
1826 mutex_lock(&pcm->open_mutex);
1827 while (1) {
1828 err = snd_pcm_oss_open_file(file, pcm, &pcm_oss_file,
1829 iminor(inode), setup);
1830 if (err >= 0)
1831 break;
1832 if (err == -EAGAIN) {
1833 if (nonblock) {
1834 err = -EBUSY;
1835 break;
1836 }
1837 } else
1838 break;
1839 set_current_state(TASK_INTERRUPTIBLE);
1840 mutex_unlock(&pcm->open_mutex);
1841 schedule();
1842 mutex_lock(&pcm->open_mutex);
1843 if (signal_pending(current)) {
1844 err = -ERESTARTSYS;
1845 break;
1846 }
1847 }
1848 remove_wait_queue(&pcm->open_wait, &wait);
1849 mutex_unlock(&pcm->open_mutex);
1850 if (err < 0)
1851 goto __error;
1852 return err;
1853
1854 __error:
1855 module_put(pcm->card->module);
1856 __error2:
1857 snd_card_file_remove(pcm->card, file);
1858 __error1:
1859 return err;
1860 }
1861
1862 static int snd_pcm_oss_release(struct inode *inode, struct file *file)
1863 {
1864 struct snd_pcm *pcm;
1865 struct snd_pcm_substream *substream;
1866 struct snd_pcm_oss_file *pcm_oss_file;
1867
1868 pcm_oss_file = file->private_data;
1869 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
1870 if (substream == NULL)
1871 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
1872 snd_assert(substream != NULL, return -ENXIO);
1873 pcm = substream->pcm;
1874 snd_pcm_oss_sync(pcm_oss_file);
1875 mutex_lock(&pcm->open_mutex);
1876 snd_pcm_oss_release_file(pcm_oss_file);
1877 mutex_unlock(&pcm->open_mutex);
1878 wake_up(&pcm->open_wait);
1879 module_put(pcm->card->module);
1880 snd_card_file_remove(pcm->card, file);
1881 return 0;
1882 }
1883
1884 static long snd_pcm_oss_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
1885 {
1886 struct snd_pcm_oss_file *pcm_oss_file;
1887 int __user *p = (int __user *)arg;
1888 int res;
1889
1890 pcm_oss_file = file->private_data;
1891 if (cmd == OSS_GETVERSION)
1892 return put_user(SNDRV_OSS_VERSION, p);
1893 if (cmd == OSS_ALSAEMULVER)
1894 return put_user(1, p);
1895 #if defined(CONFIG_SND_MIXER_OSS) || (defined(MODULE) && defined(CONFIG_SND_MIXER_OSS_MODULE))
1896 if (((cmd >> 8) & 0xff) == 'M') { /* mixer ioctl - for OSS compatibility */
1897 struct snd_pcm_substream *substream;
1898 int idx;
1899 for (idx = 0; idx < 2; ++idx) {
1900 substream = pcm_oss_file->streams[idx];
1901 if (substream != NULL)
1902 break;
1903 }
1904 snd_assert(substream != NULL, return -ENXIO);
1905 return snd_mixer_oss_ioctl_card(substream->pcm->card, cmd, arg);
1906 }
1907 #endif
1908 if (((cmd >> 8) & 0xff) != 'P')
1909 return -EINVAL;
1910 #ifdef OSS_DEBUG
1911 printk("pcm_oss: ioctl = 0x%x\n", cmd);
1912 #endif
1913 switch (cmd) {
1914 case SNDCTL_DSP_RESET:
1915 return snd_pcm_oss_reset(pcm_oss_file);
1916 case SNDCTL_DSP_SYNC:
1917 return snd_pcm_oss_sync(pcm_oss_file);
1918 case SNDCTL_DSP_SPEED:
1919 if (get_user(res, p))
1920 return -EFAULT;
1921 if ((res = snd_pcm_oss_set_rate(pcm_oss_file, res))<0)
1922 return res;
1923 return put_user(res, p);
1924 case SOUND_PCM_READ_RATE:
1925 res = snd_pcm_oss_get_rate(pcm_oss_file);
1926 if (res < 0)
1927 return res;
1928 return put_user(res, p);
1929 case SNDCTL_DSP_STEREO:
1930 if (get_user(res, p))
1931 return -EFAULT;
1932 res = res > 0 ? 2 : 1;
1933 if ((res = snd_pcm_oss_set_channels(pcm_oss_file, res)) < 0)
1934 return res;
1935 return put_user(--res, p);
1936 case SNDCTL_DSP_GETBLKSIZE:
1937 res = snd_pcm_oss_get_block_size(pcm_oss_file);
1938 if (res < 0)
1939 return res;
1940 return put_user(res, p);
1941 case SNDCTL_DSP_SETFMT:
1942 if (get_user(res, p))
1943 return -EFAULT;
1944 res = snd_pcm_oss_set_format(pcm_oss_file, res);
1945 if (res < 0)
1946 return res;
1947 return put_user(res, p);
1948 case SOUND_PCM_READ_BITS:
1949 res = snd_pcm_oss_get_format(pcm_oss_file);
1950 if (res < 0)
1951 return res;
1952 return put_user(res, p);
1953 case SNDCTL_DSP_CHANNELS:
1954 if (get_user(res, p))
1955 return -EFAULT;
1956 res = snd_pcm_oss_set_channels(pcm_oss_file, res);
1957 if (res < 0)
1958 return res;
1959 return put_user(res, p);
1960 case SOUND_PCM_READ_CHANNELS:
1961 res = snd_pcm_oss_get_channels(pcm_oss_file);
1962 if (res < 0)
1963 return res;
1964 return put_user(res, p);
1965 case SOUND_PCM_WRITE_FILTER:
1966 case SOUND_PCM_READ_FILTER:
1967 return -EIO;
1968 case SNDCTL_DSP_POST:
1969 return snd_pcm_oss_post(pcm_oss_file);
1970 case SNDCTL_DSP_SUBDIVIDE:
1971 if (get_user(res, p))
1972 return -EFAULT;
1973 res = snd_pcm_oss_set_subdivide(pcm_oss_file, res);
1974 if (res < 0)
1975 return res;
1976 return put_user(res, p);
1977 case SNDCTL_DSP_SETFRAGMENT:
1978 if (get_user(res, p))
1979 return -EFAULT;
1980 return snd_pcm_oss_set_fragment(pcm_oss_file, res);
1981 case SNDCTL_DSP_GETFMTS:
1982 res = snd_pcm_oss_get_formats(pcm_oss_file);
1983 if (res < 0)
1984 return res;
1985 return put_user(res, p);
1986 case SNDCTL_DSP_GETOSPACE:
1987 case SNDCTL_DSP_GETISPACE:
1988 return snd_pcm_oss_get_space(pcm_oss_file,
1989 cmd == SNDCTL_DSP_GETISPACE ?
1990 SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK,
1991 (struct audio_buf_info __user *) arg);
1992 case SNDCTL_DSP_NONBLOCK:
1993 return snd_pcm_oss_nonblock(file);
1994 case SNDCTL_DSP_GETCAPS:
1995 res = snd_pcm_oss_get_caps(pcm_oss_file);
1996 if (res < 0)
1997 return res;
1998 return put_user(res, p);
1999 case SNDCTL_DSP_GETTRIGGER:
2000 res = snd_pcm_oss_get_trigger(pcm_oss_file);
2001 if (res < 0)
2002 return res;
2003 return put_user(res, p);
2004 case SNDCTL_DSP_SETTRIGGER:
2005 if (get_user(res, p))
2006 return -EFAULT;
2007 return snd_pcm_oss_set_trigger(pcm_oss_file, res);
2008 case SNDCTL_DSP_GETIPTR:
2009 case SNDCTL_DSP_GETOPTR:
2010 return snd_pcm_oss_get_ptr(pcm_oss_file,
2011 cmd == SNDCTL_DSP_GETIPTR ?
2012 SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK,
2013 (struct count_info __user *) arg);
2014 case SNDCTL_DSP_MAPINBUF:
2015 case SNDCTL_DSP_MAPOUTBUF:
2016 return snd_pcm_oss_get_mapbuf(pcm_oss_file,
2017 cmd == SNDCTL_DSP_MAPINBUF ?
2018 SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK,
2019 (struct buffmem_desc __user *) arg);
2020 case SNDCTL_DSP_SETSYNCRO:
2021 /* stop DMA now.. */
2022 return 0;
2023 case SNDCTL_DSP_SETDUPLEX:
2024 if (snd_pcm_oss_get_caps(pcm_oss_file) & DSP_CAP_DUPLEX)
2025 return 0;
2026 return -EIO;
2027 case SNDCTL_DSP_GETODELAY:
2028 res = snd_pcm_oss_get_odelay(pcm_oss_file);
2029 if (res < 0) {
2030 /* it's for sure, some broken apps don't check for error codes */
2031 put_user(0, p);
2032 return res;
2033 }
2034 return put_user(res, p);
2035 case SNDCTL_DSP_PROFILE:
2036 return 0; /* silently ignore */
2037 default:
2038 snd_printd("pcm_oss: unknown command = 0x%x\n", cmd);
2039 }
2040 return -EINVAL;
2041 }
2042
2043 #ifdef CONFIG_COMPAT
2044 /* all compatible */
2045 #define snd_pcm_oss_ioctl_compat snd_pcm_oss_ioctl
2046 #else
2047 #define snd_pcm_oss_ioctl_compat NULL
2048 #endif
2049
2050 static ssize_t snd_pcm_oss_read(struct file *file, char __user *buf, size_t count, loff_t *offset)
2051 {
2052 struct snd_pcm_oss_file *pcm_oss_file;
2053 struct snd_pcm_substream *substream;
2054
2055 pcm_oss_file = file->private_data;
2056 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
2057 if (substream == NULL)
2058 return -ENXIO;
2059 #ifndef OSS_DEBUG
2060 return snd_pcm_oss_read1(substream, buf, count);
2061 #else
2062 {
2063 ssize_t res = snd_pcm_oss_read1(substream, buf, count);
2064 printk("pcm_oss: read %li bytes (returned %li bytes)\n", (long)count, (long)res);
2065 return res;
2066 }
2067 #endif
2068 }
2069
2070 static ssize_t snd_pcm_oss_write(struct file *file, const char __user *buf, size_t count, loff_t *offset)
2071 {
2072 struct snd_pcm_oss_file *pcm_oss_file;
2073 struct snd_pcm_substream *substream;
2074 long result;
2075
2076 pcm_oss_file = file->private_data;
2077 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
2078 if (substream == NULL)
2079 return -ENXIO;
2080 result = snd_pcm_oss_write1(substream, buf, count);
2081 #ifdef OSS_DEBUG
2082 printk("pcm_oss: write %li bytes (wrote %li bytes)\n", (long)count, (long)result);
2083 #endif
2084 return result;
2085 }
2086
2087 static int snd_pcm_oss_playback_ready(struct snd_pcm_substream *substream)
2088 {
2089 struct snd_pcm_runtime *runtime = substream->runtime;
2090 if (atomic_read(&runtime->mmap_count))
2091 return runtime->oss.prev_hw_ptr_interrupt != runtime->hw_ptr_interrupt;
2092 else
2093 return snd_pcm_playback_avail(runtime) >= runtime->oss.period_frames;
2094 }
2095
2096 static int snd_pcm_oss_capture_ready(struct snd_pcm_substream *substream)
2097 {
2098 struct snd_pcm_runtime *runtime = substream->runtime;
2099 if (atomic_read(&runtime->mmap_count))
2100 return runtime->oss.prev_hw_ptr_interrupt != runtime->hw_ptr_interrupt;
2101 else
2102 return snd_pcm_capture_avail(runtime) >= runtime->oss.period_frames;
2103 }
2104
2105 static unsigned int snd_pcm_oss_poll(struct file *file, poll_table * wait)
2106 {
2107 struct snd_pcm_oss_file *pcm_oss_file;
2108 unsigned int mask;
2109 struct snd_pcm_substream *psubstream = NULL, *csubstream = NULL;
2110
2111 pcm_oss_file = file->private_data;
2112
2113 psubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
2114 csubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
2115
2116 mask = 0;
2117 if (psubstream != NULL) {
2118 struct snd_pcm_runtime *runtime = psubstream->runtime;
2119 poll_wait(file, &runtime->sleep, wait);
2120 snd_pcm_stream_lock_irq(psubstream);
2121 if (runtime->status->state != SNDRV_PCM_STATE_DRAINING &&
2122 (runtime->status->state != SNDRV_PCM_STATE_RUNNING ||
2123 snd_pcm_oss_playback_ready(psubstream)))
2124 mask |= POLLOUT | POLLWRNORM;
2125 snd_pcm_stream_unlock_irq(psubstream);
2126 }
2127 if (csubstream != NULL) {
2128 struct snd_pcm_runtime *runtime = csubstream->runtime;
2129 snd_pcm_state_t ostate;
2130 poll_wait(file, &runtime->sleep, wait);
2131 snd_pcm_stream_lock_irq(csubstream);
2132 if ((ostate = runtime->status->state) != SNDRV_PCM_STATE_RUNNING ||
2133 snd_pcm_oss_capture_ready(csubstream))
2134 mask |= POLLIN | POLLRDNORM;
2135 snd_pcm_stream_unlock_irq(csubstream);
2136 if (ostate != SNDRV_PCM_STATE_RUNNING && runtime->oss.trigger) {
2137 struct snd_pcm_oss_file ofile;
2138 memset(&ofile, 0, sizeof(ofile));
2139 ofile.streams[SNDRV_PCM_STREAM_CAPTURE] = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
2140 runtime->oss.trigger = 0;
2141 snd_pcm_oss_set_trigger(&ofile, PCM_ENABLE_INPUT);
2142 }
2143 }
2144
2145 return mask;
2146 }
2147
2148 static int snd_pcm_oss_mmap(struct file *file, struct vm_area_struct *area)
2149 {
2150 struct snd_pcm_oss_file *pcm_oss_file;
2151 struct snd_pcm_substream *substream = NULL;
2152 struct snd_pcm_runtime *runtime;
2153 int err;
2154
2155 #ifdef OSS_DEBUG
2156 printk("pcm_oss: mmap begin\n");
2157 #endif
2158 pcm_oss_file = file->private_data;
2159 switch ((area->vm_flags & (VM_READ | VM_WRITE))) {
2160 case VM_READ | VM_WRITE:
2161 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
2162 if (substream)
2163 break;
2164 /* Fall through */
2165 case VM_READ:
2166 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
2167 break;
2168 case VM_WRITE:
2169 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
2170 break;
2171 default:
2172 return -EINVAL;
2173 }
2174 /* set VM_READ access as well to fix memset() routines that do
2175 reads before writes (to improve performance) */
2176 area->vm_flags |= VM_READ;
2177 if (substream == NULL)
2178 return -ENXIO;
2179 runtime = substream->runtime;
2180 if (!(runtime->info & SNDRV_PCM_INFO_MMAP_VALID))
2181 return -EIO;
2182 if (runtime->info & SNDRV_PCM_INFO_INTERLEAVED)
2183 runtime->access = SNDRV_PCM_ACCESS_MMAP_INTERLEAVED;
2184 else
2185 return -EIO;
2186
2187 if (runtime->oss.params) {
2188 if ((err = snd_pcm_oss_change_params(substream)) < 0)
2189 return err;
2190 }
2191 #ifdef CONFIG_SND_PCM_OSS_PLUGINS
2192 if (runtime->oss.plugin_first != NULL)
2193 return -EIO;
2194 #endif
2195
2196 if (area->vm_pgoff != 0)
2197 return -EINVAL;
2198
2199 err = snd_pcm_mmap_data(substream, file, area);
2200 if (err < 0)
2201 return err;
2202 runtime->oss.mmap_bytes = area->vm_end - area->vm_start;
2203 runtime->silence_threshold = 0;
2204 runtime->silence_size = 0;
2205 #ifdef OSS_DEBUG
2206 printk("pcm_oss: mmap ok, bytes = 0x%x\n", runtime->oss.mmap_bytes);
2207 #endif
2208 /* In mmap mode we never stop */
2209 runtime->stop_threshold = runtime->boundary;
2210
2211 return 0;
2212 }
2213
2214 #ifdef CONFIG_PROC_FS
2215 /*
2216 * /proc interface
2217 */
2218
2219 static void snd_pcm_oss_proc_read(struct snd_info_entry *entry,
2220 struct snd_info_buffer *buffer)
2221 {
2222 struct snd_pcm_str *pstr = entry->private_data;
2223 struct snd_pcm_oss_setup *setup = pstr->oss.setup_list;
2224 mutex_lock(&pstr->oss.setup_mutex);
2225 while (setup) {
2226 snd_iprintf(buffer, "%s %u %u%s%s%s%s%s%s\n",
2227 setup->task_name,
2228 setup->periods,
2229 setup->period_size,
2230 setup->disable ? " disable" : "",
2231 setup->direct ? " direct" : "",
2232 setup->block ? " block" : "",
2233 setup->nonblock ? " non-block" : "",
2234 setup->partialfrag ? " partial-frag" : "",
2235 setup->nosilence ? " no-silence" : "");
2236 setup = setup->next;
2237 }
2238 mutex_unlock(&pstr->oss.setup_mutex);
2239 }
2240
2241 static void snd_pcm_oss_proc_free_setup_list(struct snd_pcm_str * pstr)
2242 {
2243 struct snd_pcm_oss_setup *setup, *setupn;
2244
2245 for (setup = pstr->oss.setup_list, pstr->oss.setup_list = NULL;
2246 setup; setup = setupn) {
2247 setupn = setup->next;
2248 kfree(setup->task_name);
2249 kfree(setup);
2250 }
2251 pstr->oss.setup_list = NULL;
2252 }
2253
2254 static void snd_pcm_oss_proc_write(struct snd_info_entry *entry,
2255 struct snd_info_buffer *buffer)
2256 {
2257 struct snd_pcm_str *pstr = entry->private_data;
2258 char line[128], str[32], task_name[32], *ptr;
2259 int idx1;
2260 struct snd_pcm_oss_setup *setup, *setup1, template;
2261
2262 while (!snd_info_get_line(buffer, line, sizeof(line))) {
2263 mutex_lock(&pstr->oss.setup_mutex);
2264 memset(&template, 0, sizeof(template));
2265 ptr = snd_info_get_str(task_name, line, sizeof(task_name));
2266 if (!strcmp(task_name, "clear") || !strcmp(task_name, "erase")) {
2267 snd_pcm_oss_proc_free_setup_list(pstr);
2268 mutex_unlock(&pstr->oss.setup_mutex);
2269 continue;
2270 }
2271 for (setup = pstr->oss.setup_list; setup; setup = setup->next) {
2272 if (!strcmp(setup->task_name, task_name)) {
2273 template = *setup;
2274 break;
2275 }
2276 }
2277 ptr = snd_info_get_str(str, ptr, sizeof(str));
2278 template.periods = simple_strtoul(str, NULL, 10);
2279 ptr = snd_info_get_str(str, ptr, sizeof(str));
2280 template.period_size = simple_strtoul(str, NULL, 10);
2281 for (idx1 = 31; idx1 >= 0; idx1--)
2282 if (template.period_size & (1 << idx1))
2283 break;
2284 for (idx1--; idx1 >= 0; idx1--)
2285 template.period_size &= ~(1 << idx1);
2286 do {
2287 ptr = snd_info_get_str(str, ptr, sizeof(str));
2288 if (!strcmp(str, "disable")) {
2289 template.disable = 1;
2290 } else if (!strcmp(str, "direct")) {
2291 template.direct = 1;
2292 } else if (!strcmp(str, "block")) {
2293 template.block = 1;
2294 } else if (!strcmp(str, "non-block")) {
2295 template.nonblock = 1;
2296 } else if (!strcmp(str, "partial-frag")) {
2297 template.partialfrag = 1;
2298 } else if (!strcmp(str, "no-silence")) {
2299 template.nosilence = 1;
2300 } else if (!strcmp(str, "buggy-ptr")) {
2301 template.buggyptr = 1;
2302 }
2303 } while (*str);
2304 if (setup == NULL) {
2305 setup = kmalloc(sizeof(*setup), GFP_KERNEL);
2306 if (! setup) {
2307 buffer->error = -ENOMEM;
2308 mutex_lock(&pstr->oss.setup_mutex);
2309 return;
2310 }
2311 if (pstr->oss.setup_list == NULL)
2312 pstr->oss.setup_list = setup;
2313 else {
2314 for (setup1 = pstr->oss.setup_list;
2315 setup1->next; setup1 = setup1->next);
2316 setup1->next = setup;
2317 }
2318 template.task_name = kstrdup(task_name, GFP_KERNEL);
2319 if (! template.task_name) {
2320 kfree(setup);
2321 buffer->error = -ENOMEM;
2322 mutex_lock(&pstr->oss.setup_mutex);
2323 return;
2324 }
2325 }
2326 *setup = template;
2327 mutex_unlock(&pstr->oss.setup_mutex);
2328 }
2329 }
2330
2331 static void snd_pcm_oss_proc_init(struct snd_pcm *pcm)
2332 {
2333 int stream;
2334 for (stream = 0; stream < 2; ++stream) {
2335 struct snd_info_entry *entry;
2336 struct snd_pcm_str *pstr = &pcm->streams[stream];
2337 if (pstr->substream_count == 0)
2338 continue;
2339 if ((entry = snd_info_create_card_entry(pcm->card, "oss", pstr->proc_root)) != NULL) {
2340 entry->content = SNDRV_INFO_CONTENT_TEXT;
2341 entry->mode = S_IFREG | S_IRUGO | S_IWUSR;
2342 entry->c.text.read_size = 8192;
2343 entry->c.text.read = snd_pcm_oss_proc_read;
2344 entry->c.text.write_size = 8192;
2345 entry->c.text.write = snd_pcm_oss_proc_write;
2346 entry->private_data = pstr;
2347 if (snd_info_register(entry) < 0) {
2348 snd_info_free_entry(entry);
2349 entry = NULL;
2350 }
2351 }
2352 pstr->oss.proc_entry = entry;
2353 }
2354 }
2355
2356 static void snd_pcm_oss_proc_done(struct snd_pcm *pcm)
2357 {
2358 int stream;
2359 for (stream = 0; stream < 2; ++stream) {
2360 struct snd_pcm_str *pstr = &pcm->streams[stream];
2361 if (pstr->oss.proc_entry) {
2362 snd_info_unregister(pstr->oss.proc_entry);
2363 pstr->oss.proc_entry = NULL;
2364 snd_pcm_oss_proc_free_setup_list(pstr);
2365 }
2366 }
2367 }
2368 #else /* !CONFIG_PROC_FS */
2369 #define snd_pcm_oss_proc_init(pcm)
2370 #define snd_pcm_oss_proc_done(pcm)
2371 #endif /* CONFIG_PROC_FS */
2372
2373 /*
2374 * ENTRY functions
2375 */
2376
2377 static struct file_operations snd_pcm_oss_f_reg =
2378 {
2379 .owner = THIS_MODULE,
2380 .read = snd_pcm_oss_read,
2381 .write = snd_pcm_oss_write,
2382 .open = snd_pcm_oss_open,
2383 .release = snd_pcm_oss_release,
2384 .poll = snd_pcm_oss_poll,
2385 .unlocked_ioctl = snd_pcm_oss_ioctl,
2386 .compat_ioctl = snd_pcm_oss_ioctl_compat,
2387 .mmap = snd_pcm_oss_mmap,
2388 };
2389
2390 static void register_oss_dsp(struct snd_pcm *pcm, int index)
2391 {
2392 char name[128];
2393 sprintf(name, "dsp%i%i", pcm->card->number, pcm->device);
2394 if (snd_register_oss_device(SNDRV_OSS_DEVICE_TYPE_PCM,
2395 pcm->card, index, &snd_pcm_oss_f_reg,
2396 pcm, name) < 0) {
2397 snd_printk(KERN_ERR "unable to register OSS PCM device %i:%i\n",
2398 pcm->card->number, pcm->device);
2399 }
2400 }
2401
2402 static int snd_pcm_oss_register_minor(struct snd_pcm *pcm)
2403 {
2404 pcm->oss.reg = 0;
2405 if (dsp_map[pcm->card->number] == (int)pcm->device) {
2406 char name[128];
2407 int duplex;
2408 register_oss_dsp(pcm, 0);
2409 duplex = (pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream_count > 0 &&
2410 pcm->streams[SNDRV_PCM_STREAM_CAPTURE].substream_count &&
2411 !(pcm->info_flags & SNDRV_PCM_INFO_HALF_DUPLEX));
2412 sprintf(name, "%s%s", pcm->name, duplex ? " (DUPLEX)" : "");
2413 #ifdef SNDRV_OSS_INFO_DEV_AUDIO
2414 snd_oss_info_register(SNDRV_OSS_INFO_DEV_AUDIO,
2415 pcm->card->number,
2416 name);
2417 #endif
2418 pcm->oss.reg++;
2419 pcm->oss.reg_mask |= 1;
2420 }
2421 if (adsp_map[pcm->card->number] == (int)pcm->device) {
2422 register_oss_dsp(pcm, 1);
2423 pcm->oss.reg++;
2424 pcm->oss.reg_mask |= 2;
2425 }
2426
2427 if (pcm->oss.reg)
2428 snd_pcm_oss_proc_init(pcm);
2429
2430 return 0;
2431 }
2432
2433 static int snd_pcm_oss_disconnect_minor(struct snd_pcm *pcm)
2434 {
2435 if (pcm->oss.reg) {
2436 if (pcm->oss.reg_mask & 1) {
2437 pcm->oss.reg_mask &= ~1;
2438 snd_unregister_oss_device(SNDRV_OSS_DEVICE_TYPE_PCM,
2439 pcm->card, 0);
2440 }
2441 if (pcm->oss.reg_mask & 2) {
2442 pcm->oss.reg_mask &= ~2;
2443 snd_unregister_oss_device(SNDRV_OSS_DEVICE_TYPE_PCM,
2444 pcm->card, 1);
2445 }
2446 }
2447 return 0;
2448 }
2449
2450 static int snd_pcm_oss_unregister_minor(struct snd_pcm *pcm)
2451 {
2452 snd_pcm_oss_disconnect_minor(pcm);
2453 if (pcm->oss.reg) {
2454 if (dsp_map[pcm->card->number] == (int)pcm->device) {
2455 #ifdef SNDRV_OSS_INFO_DEV_AUDIO
2456 snd_oss_info_unregister(SNDRV_OSS_INFO_DEV_AUDIO, pcm->card->number);
2457 #endif
2458 }
2459 pcm->oss.reg = 0;
2460 snd_pcm_oss_proc_done(pcm);
2461 }
2462 return 0;
2463 }
2464
2465 static struct snd_pcm_notify snd_pcm_oss_notify =
2466 {
2467 .n_register = snd_pcm_oss_register_minor,
2468 .n_disconnect = snd_pcm_oss_disconnect_minor,
2469 .n_unregister = snd_pcm_oss_unregister_minor,
2470 };
2471
2472 static int __init alsa_pcm_oss_init(void)
2473 {
2474 int i;
2475 int err;
2476
2477 /* check device map table */
2478 for (i = 0; i < SNDRV_CARDS; i++) {
2479 if (dsp_map[i] < 0 || dsp_map[i] >= SNDRV_PCM_DEVICES) {
2480 snd_printk(KERN_ERR "invalid dsp_map[%d] = %d\n",
2481 i, dsp_map[i]);
2482 dsp_map[i] = 0;
2483 }
2484 if (adsp_map[i] < 0 || adsp_map[i] >= SNDRV_PCM_DEVICES) {
2485 snd_printk(KERN_ERR "invalid adsp_map[%d] = %d\n",
2486 i, adsp_map[i]);
2487 adsp_map[i] = 1;
2488 }
2489 }
2490 if ((err = snd_pcm_notify(&snd_pcm_oss_notify, 0)) < 0)
2491 return err;
2492 return 0;
2493 }
2494
2495 static void __exit alsa_pcm_oss_exit(void)
2496 {
2497 snd_pcm_notify(&snd_pcm_oss_notify, 1);
2498 }
2499
2500 module_init(alsa_pcm_oss_init)
2501 module_exit(alsa_pcm_oss_exit)
kernel-based virtual machine