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[PATCH] fix semaphore handling in __unregister_chrdev_region
[linux/fpc-iii.git] / sound / core / oss / pcm_oss.c
blob1a805020f57a5f3f93293a925ae613a13510f8a9
1 /*
2 * Digital Audio (PCM) abstract layer / OSS compatible
3 * Copyright (c) by Jaroslav Kysela <perex@suse.cz>
4 *
5 *
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2 of the License, or
9 * (at your option) any later version.
10 *
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
15 *
16 * You should have received a copy of the GNU General Public License
17 * along with this program; if not, write to the Free Software
18 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
19 *
20 */
21
22 #if 0
23 #define PLUGIN_DEBUG
24 #endif
25 #if 0
26 #define OSS_DEBUG
27 #endif
28
29 #include <sound/driver.h>
30 #include <linux/init.h>
31 #include <linux/smp_lock.h>
32 #include <linux/slab.h>
33 #include <linux/time.h>
34 #include <linux/vmalloc.h>
35 #include <linux/moduleparam.h>
36 #include <sound/core.h>
37 #include <sound/minors.h>
38 #include <sound/pcm.h>
39 #include <sound/pcm_params.h>
40 #include "pcm_plugin.h"
41 #include <sound/info.h>
42 #include <linux/soundcard.h>
43 #include <sound/initval.h>
44
45 #define OSS_ALSAEMULVER _SIOR ('M', 249, int)
46
47 static int dsp_map[SNDRV_CARDS] = {[0 ... (SNDRV_CARDS-1)] = 0};
48 static int adsp_map[SNDRV_CARDS] = {[0 ... (SNDRV_CARDS-1)] = 1};
49 static int nonblock_open = 1;
50
51 MODULE_AUTHOR("Jaroslav Kysela <perex@suse.cz>, Abramo Bagnara <abramo@alsa-project.org>");
52 MODULE_DESCRIPTION("PCM OSS emulation for ALSA.");
53 MODULE_LICENSE("GPL");
54 module_param_array(dsp_map, int, NULL, 0444);
55 MODULE_PARM_DESC(dsp_map, "PCM device number assigned to 1st OSS device.");
56 module_param_array(adsp_map, int, NULL, 0444);
57 MODULE_PARM_DESC(adsp_map, "PCM device number assigned to 2nd OSS device.");
58 module_param(nonblock_open, bool, 0644);
59 MODULE_PARM_DESC(nonblock_open, "Don't block opening busy PCM devices.");
60 MODULE_ALIAS_SNDRV_MINOR(SNDRV_MINOR_OSS_PCM);
61 MODULE_ALIAS_SNDRV_MINOR(SNDRV_MINOR_OSS_PCM1);
62
63 extern int snd_mixer_oss_ioctl_card(snd_card_t *card, unsigned int cmd, unsigned long arg);
64 static int snd_pcm_oss_get_rate(snd_pcm_oss_file_t *pcm_oss_file);
65 static int snd_pcm_oss_get_channels(snd_pcm_oss_file_t *pcm_oss_file);
66 static int snd_pcm_oss_get_format(snd_pcm_oss_file_t *pcm_oss_file);
67
68 static inline mm_segment_t snd_enter_user(void)
69 {
70 mm_segment_t fs = get_fs();
71 set_fs(get_ds());
72 return fs;
73 }
74
75 static inline void snd_leave_user(mm_segment_t fs)
76 {
77 set_fs(fs);
78 }
79
80 static int snd_pcm_oss_plugin_clear(snd_pcm_substream_t *substream)
81 {
82 snd_pcm_runtime_t *runtime = substream->runtime;
83 snd_pcm_plugin_t *plugin, *next;
84
85 plugin = runtime->oss.plugin_first;
86 while (plugin) {
87 next = plugin->next;
88 snd_pcm_plugin_free(plugin);
89 plugin = next;
90 }
91 runtime->oss.plugin_first = runtime->oss.plugin_last = NULL;
92 return 0;
93 }
94
95 static int snd_pcm_plugin_insert(snd_pcm_plugin_t *plugin)
96 {
97 snd_pcm_runtime_t *runtime = plugin->plug->runtime;
98 plugin->next = runtime->oss.plugin_first;
99 plugin->prev = NULL;
100 if (runtime->oss.plugin_first) {
101 runtime->oss.plugin_first->prev = plugin;
102 runtime->oss.plugin_first = plugin;
103 } else {
104 runtime->oss.plugin_last =
105 runtime->oss.plugin_first = plugin;
106 }
107 return 0;
108 }
109
110 int snd_pcm_plugin_append(snd_pcm_plugin_t *plugin)
111 {
112 snd_pcm_runtime_t *runtime = plugin->plug->runtime;
113 plugin->next = NULL;
114 plugin->prev = runtime->oss.plugin_last;
115 if (runtime->oss.plugin_last) {
116 runtime->oss.plugin_last->next = plugin;
117 runtime->oss.plugin_last = plugin;
118 } else {
119 runtime->oss.plugin_last =
120 runtime->oss.plugin_first = plugin;
121 }
122 return 0;
123 }
124
125 static long snd_pcm_oss_bytes(snd_pcm_substream_t *substream, long frames)
126 {
127 snd_pcm_runtime_t *runtime = substream->runtime;
128 snd_pcm_uframes_t buffer_size = snd_pcm_lib_buffer_bytes(substream);
129 frames = frames_to_bytes(runtime, frames);
130 if (buffer_size == runtime->oss.buffer_bytes)
131 return frames;
132 return (runtime->oss.buffer_bytes * frames) / buffer_size;
133 }
134
135 static long snd_pcm_alsa_frames(snd_pcm_substream_t *substream, long bytes)
136 {
137 snd_pcm_runtime_t *runtime = substream->runtime;
138 snd_pcm_uframes_t buffer_size = snd_pcm_lib_buffer_bytes(substream);
139 if (buffer_size == runtime->oss.buffer_bytes)
140 return bytes_to_frames(runtime, bytes);
141 return bytes_to_frames(runtime, (buffer_size * bytes) / runtime->oss.buffer_bytes);
142 }
143
144 static int snd_pcm_oss_format_from(int format)
145 {
146 switch (format) {
147 case AFMT_MU_LAW: return SNDRV_PCM_FORMAT_MU_LAW;
148 case AFMT_A_LAW: return SNDRV_PCM_FORMAT_A_LAW;
149 case AFMT_IMA_ADPCM: return SNDRV_PCM_FORMAT_IMA_ADPCM;
150 case AFMT_U8: return SNDRV_PCM_FORMAT_U8;
151 case AFMT_S16_LE: return SNDRV_PCM_FORMAT_S16_LE;
152 case AFMT_S16_BE: return SNDRV_PCM_FORMAT_S16_BE;
153 case AFMT_S8: return SNDRV_PCM_FORMAT_S8;
154 case AFMT_U16_LE: return SNDRV_PCM_FORMAT_U16_LE;
155 case AFMT_U16_BE: return SNDRV_PCM_FORMAT_U16_BE;
156 case AFMT_MPEG: return SNDRV_PCM_FORMAT_MPEG;
157 default: return SNDRV_PCM_FORMAT_U8;
158 }
159 }
160
161 static int snd_pcm_oss_format_to(int format)
162 {
163 switch (format) {
164 case SNDRV_PCM_FORMAT_MU_LAW: return AFMT_MU_LAW;
165 case SNDRV_PCM_FORMAT_A_LAW: return AFMT_A_LAW;
166 case SNDRV_PCM_FORMAT_IMA_ADPCM: return AFMT_IMA_ADPCM;
167 case SNDRV_PCM_FORMAT_U8: return AFMT_U8;
168 case SNDRV_PCM_FORMAT_S16_LE: return AFMT_S16_LE;
169 case SNDRV_PCM_FORMAT_S16_BE: return AFMT_S16_BE;
170 case SNDRV_PCM_FORMAT_S8: return AFMT_S8;
171 case SNDRV_PCM_FORMAT_U16_LE: return AFMT_U16_LE;
172 case SNDRV_PCM_FORMAT_U16_BE: return AFMT_U16_BE;
173 case SNDRV_PCM_FORMAT_MPEG: return AFMT_MPEG;
174 default: return -EINVAL;
175 }
176 }
177
178 static int snd_pcm_oss_period_size(snd_pcm_substream_t *substream,
179 snd_pcm_hw_params_t *oss_params,
180 snd_pcm_hw_params_t *slave_params)
181 {
182 size_t s;
183 size_t oss_buffer_size, oss_period_size, oss_periods;
184 size_t min_period_size, max_period_size;
185 snd_pcm_runtime_t *runtime = substream->runtime;
186 size_t oss_frame_size;
187
188 oss_frame_size = snd_pcm_format_physical_width(params_format(oss_params)) *
189 params_channels(oss_params) / 8;
190
191 oss_buffer_size = snd_pcm_plug_client_size(substream,
192 snd_pcm_hw_param_value_max(slave_params, SNDRV_PCM_HW_PARAM_BUFFER_SIZE, NULL)) * oss_frame_size;
193 oss_buffer_size = 1 << ld2(oss_buffer_size);
194 if (atomic_read(&runtime->mmap_count)) {
195 if (oss_buffer_size > runtime->oss.mmap_bytes)
196 oss_buffer_size = runtime->oss.mmap_bytes;
197 }
198
199 if (substream->oss.setup &&
200 substream->oss.setup->period_size > 16)
201 oss_period_size = substream->oss.setup->period_size;
202 else if (runtime->oss.fragshift) {
203 oss_period_size = 1 << runtime->oss.fragshift;
204 if (oss_period_size > oss_buffer_size / 2)
205 oss_period_size = oss_buffer_size / 2;
206 } else {
207 int sd;
208 size_t bytes_per_sec = params_rate(oss_params) * snd_pcm_format_physical_width(params_format(oss_params)) * params_channels(oss_params) / 8;
209
210 oss_period_size = oss_buffer_size;
211 do {
212 oss_period_size /= 2;
213 } while (oss_period_size > bytes_per_sec);
214 if (runtime->oss.subdivision == 0) {
215 sd = 4;
216 if (oss_period_size / sd > 4096)
217 sd *= 2;
218 if (oss_period_size / sd < 4096)
219 sd = 1;
220 } else
221 sd = runtime->oss.subdivision;
222 oss_period_size /= sd;
223 if (oss_period_size < 16)
224 oss_period_size = 16;
225 }
226
227 min_period_size = snd_pcm_plug_client_size(substream,
228 snd_pcm_hw_param_value_min(slave_params, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, NULL));
229 min_period_size *= oss_frame_size;
230 min_period_size = 1 << (ld2(min_period_size - 1) + 1);
231 if (oss_period_size < min_period_size)
232 oss_period_size = min_period_size;
233
234 max_period_size = snd_pcm_plug_client_size(substream,
235 snd_pcm_hw_param_value_max(slave_params, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, NULL));
236 max_period_size *= oss_frame_size;
237 max_period_size = 1 << ld2(max_period_size);
238 if (oss_period_size > max_period_size)
239 oss_period_size = max_period_size;
240
241 oss_periods = oss_buffer_size / oss_period_size;
242
243 if (substream->oss.setup) {
244 if (substream->oss.setup->periods > 1)
245 oss_periods = substream->oss.setup->periods;
246 }
247
248 s = snd_pcm_hw_param_value_max(slave_params, SNDRV_PCM_HW_PARAM_PERIODS, NULL);
249 if (runtime->oss.maxfrags && s > runtime->oss.maxfrags)
250 s = runtime->oss.maxfrags;
251 if (oss_periods > s)
252 oss_periods = s;
253
254 s = snd_pcm_hw_param_value_min(slave_params, SNDRV_PCM_HW_PARAM_PERIODS, NULL);
255 if (s < 2)
256 s = 2;
257 if (oss_periods < s)
258 oss_periods = s;
259
260 while (oss_period_size * oss_periods > oss_buffer_size)
261 oss_period_size /= 2;
262
263 snd_assert(oss_period_size >= 16, return -EINVAL);
264 runtime->oss.period_bytes = oss_period_size;
265 runtime->oss.period_frames = 1;
266 runtime->oss.periods = oss_periods;
267 return 0;
268 }
269
270 static int choose_rate(snd_pcm_substream_t *substream,
271 snd_pcm_hw_params_t *params, unsigned int best_rate)
272 {
273 snd_interval_t *it;
274 snd_pcm_hw_params_t *save;
275 unsigned int rate, prev;
276
277 save = kmalloc(sizeof(*save), GFP_KERNEL);
278 if (save == NULL)
279 return -ENOMEM;
280 *save = *params;
281 it = hw_param_interval(save, SNDRV_PCM_HW_PARAM_RATE);
282
283 /* try multiples of the best rate */
284 rate = best_rate;
285 for (;;) {
286 if (it->max < rate || (it->max == rate && it->openmax))
287 break;
288 if (it->min < rate || (it->min == rate && !it->openmin)) {
289 int ret;
290 ret = snd_pcm_hw_param_set(substream, params,
291 SNDRV_PCM_HW_PARAM_RATE,
292 rate, 0);
293 if (ret == (int)rate) {
294 kfree(save);
295 return rate;
296 }
297 *params = *save;
298 }
299 prev = rate;
300 rate += best_rate;
301 if (rate <= prev)
302 break;
303 }
304
305 /* not found, use the nearest rate */
306 kfree(save);
307 return snd_pcm_hw_param_near(substream, params, SNDRV_PCM_HW_PARAM_RATE, best_rate, NULL);
308 }
309
310 static int snd_pcm_oss_change_params(snd_pcm_substream_t *substream)
311 {
312 snd_pcm_runtime_t *runtime = substream->runtime;
313 snd_pcm_hw_params_t *params, *sparams;
314 snd_pcm_sw_params_t *sw_params;
315 ssize_t oss_buffer_size, oss_period_size;
316 size_t oss_frame_size;
317 int err;
318 int direct;
319 int format, sformat, n;
320 snd_mask_t sformat_mask;
321 snd_mask_t mask;
322
323 sw_params = kmalloc(sizeof(*sw_params), GFP_KERNEL);
324 params = kmalloc(sizeof(*params), GFP_KERNEL);
325 sparams = kmalloc(sizeof(*sparams), GFP_KERNEL);
326 if (!sw_params || !params || !sparams) {
327 snd_printd("No memory\n");
328 err = -ENOMEM;
329 goto failure;
330 }
331
332 if (atomic_read(&runtime->mmap_count)) {
333 direct = 1;
334 } else {
335 snd_pcm_oss_setup_t *setup = substream->oss.setup;
336 direct = (setup != NULL && setup->direct);
337 }
338
339 _snd_pcm_hw_params_any(sparams);
340 _snd_pcm_hw_param_setinteger(sparams, SNDRV_PCM_HW_PARAM_PERIODS);
341 _snd_pcm_hw_param_min(sparams, SNDRV_PCM_HW_PARAM_PERIODS, 2, 0);
342 snd_mask_none(&mask);
343 if (atomic_read(&runtime->mmap_count))
344 snd_mask_set(&mask, SNDRV_PCM_ACCESS_MMAP_INTERLEAVED);
345 else {
346 snd_mask_set(&mask, SNDRV_PCM_ACCESS_RW_INTERLEAVED);
347 if (!direct)
348 snd_mask_set(&mask, SNDRV_PCM_ACCESS_RW_NONINTERLEAVED);
349 }
350 err = snd_pcm_hw_param_mask(substream, sparams, SNDRV_PCM_HW_PARAM_ACCESS, &mask);
351 if (err < 0) {
352 snd_printd("No usable accesses\n");
353 err = -EINVAL;
354 goto failure;
355 }
356 choose_rate(substream, sparams, runtime->oss.rate);
357 snd_pcm_hw_param_near(substream, sparams, SNDRV_PCM_HW_PARAM_CHANNELS, runtime->oss.channels, NULL);
358
359 format = snd_pcm_oss_format_from(runtime->oss.format);
360
361 sformat_mask = *hw_param_mask(sparams, SNDRV_PCM_HW_PARAM_FORMAT);
362 if (direct)
363 sformat = format;
364 else
365 sformat = snd_pcm_plug_slave_format(format, &sformat_mask);
366
367 if (sformat < 0 || !snd_mask_test(&sformat_mask, sformat)) {
368 for (sformat = 0; sformat <= SNDRV_PCM_FORMAT_LAST; sformat++) {
369 if (snd_mask_test(&sformat_mask, sformat) &&
370 snd_pcm_oss_format_to(sformat) >= 0)
371 break;
372 }
373 if (sformat > SNDRV_PCM_FORMAT_LAST) {
374 snd_printd("Cannot find a format!!!\n");
375 err = -EINVAL;
376 goto failure;
377 }
378 }
379 err = _snd_pcm_hw_param_set(sparams, SNDRV_PCM_HW_PARAM_FORMAT, sformat, 0);
380 snd_assert(err >= 0, goto failure);
381
382 if (direct) {
383 memcpy(params, sparams, sizeof(*params));
384 } else {
385 _snd_pcm_hw_params_any(params);
386 _snd_pcm_hw_param_set(params, SNDRV_PCM_HW_PARAM_ACCESS,
387 SNDRV_PCM_ACCESS_RW_INTERLEAVED, 0);
388 _snd_pcm_hw_param_set(params, SNDRV_PCM_HW_PARAM_FORMAT,
389 snd_pcm_oss_format_from(runtime->oss.format), 0);
390 _snd_pcm_hw_param_set(params, SNDRV_PCM_HW_PARAM_CHANNELS,
391 runtime->oss.channels, 0);
392 _snd_pcm_hw_param_set(params, SNDRV_PCM_HW_PARAM_RATE,
393 runtime->oss.rate, 0);
394 pdprintf("client: access = %i, format = %i, channels = %i, rate = %i\n",
395 params_access(params), params_format(params),
396 params_channels(params), params_rate(params));
397 }
398 pdprintf("slave: access = %i, format = %i, channels = %i, rate = %i\n",
399 params_access(sparams), params_format(sparams),
400 params_channels(sparams), params_rate(sparams));
401
402 oss_frame_size = snd_pcm_format_physical_width(params_format(params)) *
403 params_channels(params) / 8;
404
405 snd_pcm_oss_plugin_clear(substream);
406 if (!direct) {
407 /* add necessary plugins */
408 snd_pcm_oss_plugin_clear(substream);
409 if ((err = snd_pcm_plug_format_plugins(substream,
410 params,
411 sparams)) < 0) {
412 snd_printd("snd_pcm_plug_format_plugins failed: %i\n", err);
413 snd_pcm_oss_plugin_clear(substream);
414 goto failure;
415 }
416 if (runtime->oss.plugin_first) {
417 snd_pcm_plugin_t *plugin;
418 if ((err = snd_pcm_plugin_build_io(substream, sparams, &plugin)) < 0) {
419 snd_printd("snd_pcm_plugin_build_io failed: %i\n", err);
420 snd_pcm_oss_plugin_clear(substream);
421 goto failure;
422 }
423 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
424 err = snd_pcm_plugin_append(plugin);
425 } else {
426 err = snd_pcm_plugin_insert(plugin);
427 }
428 if (err < 0) {
429 snd_pcm_oss_plugin_clear(substream);
430 goto failure;
431 }
432 }
433 }
434
435 err = snd_pcm_oss_period_size(substream, params, sparams);
436 if (err < 0)
437 goto failure;
438
439 n = snd_pcm_plug_slave_size(substream, runtime->oss.period_bytes / oss_frame_size);
440 err = snd_pcm_hw_param_near(substream, sparams, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, n, NULL);
441 snd_assert(err >= 0, goto failure);
442
443 err = snd_pcm_hw_param_near(substream, sparams, SNDRV_PCM_HW_PARAM_PERIODS,
444 runtime->oss.periods, NULL);
445 snd_assert(err >= 0, goto failure);
446
447 snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DROP, NULL);
448
449 if ((err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_HW_PARAMS, sparams)) < 0) {
450 snd_printd("HW_PARAMS failed: %i\n", err);
451 goto failure;
452 }
453
454 memset(sw_params, 0, sizeof(*sw_params));
455 if (runtime->oss.trigger) {
456 sw_params->start_threshold = 1;
457 } else {
458 sw_params->start_threshold = runtime->boundary;
459 }
460 if (atomic_read(&runtime->mmap_count) || substream->stream == SNDRV_PCM_STREAM_CAPTURE)
461 sw_params->stop_threshold = runtime->boundary;
462 else
463 sw_params->stop_threshold = runtime->buffer_size;
464 sw_params->tstamp_mode = SNDRV_PCM_TSTAMP_NONE;
465 sw_params->period_step = 1;
466 sw_params->sleep_min = 0;
467 sw_params->avail_min = 1;
468 sw_params->xfer_align = 1;
469 if (atomic_read(&runtime->mmap_count) ||
470 (substream->oss.setup && substream->oss.setup->nosilence)) {
471 sw_params->silence_threshold = 0;
472 sw_params->silence_size = 0;
473 } else {
474 snd_pcm_uframes_t frames;
475 frames = runtime->period_size + 16;
476 if (frames > runtime->buffer_size)
477 frames = runtime->buffer_size;
478 sw_params->silence_threshold = frames;
479 sw_params->silence_size = frames;
480 }
481
482 if ((err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_SW_PARAMS, sw_params)) < 0) {
483 snd_printd("SW_PARAMS failed: %i\n", err);
484 goto failure;
485 }
486
487 runtime->oss.periods = params_periods(sparams);
488 oss_period_size = snd_pcm_plug_client_size(substream, params_period_size(sparams));
489 snd_assert(oss_period_size >= 0, err = -EINVAL; goto failure);
490 if (runtime->oss.plugin_first) {
491 err = snd_pcm_plug_alloc(substream, oss_period_size);
492 if (err < 0)
493 goto failure;
494 }
495 oss_period_size *= oss_frame_size;
496
497 oss_buffer_size = oss_period_size * runtime->oss.periods;
498 snd_assert(oss_buffer_size >= 0, err = -EINVAL; goto failure);
499
500 runtime->oss.period_bytes = oss_period_size;
501 runtime->oss.buffer_bytes = oss_buffer_size;
502
503 pdprintf("oss: period bytes = %i, buffer bytes = %i\n",
504 runtime->oss.period_bytes,
505 runtime->oss.buffer_bytes);
506 pdprintf("slave: period_size = %i, buffer_size = %i\n",
507 params_period_size(sparams),
508 params_buffer_size(sparams));
509
510 runtime->oss.format = snd_pcm_oss_format_to(params_format(params));
511 runtime->oss.channels = params_channels(params);
512 runtime->oss.rate = params_rate(params);
513
514 runtime->oss.params = 0;
515 runtime->oss.prepare = 1;
516 vfree(runtime->oss.buffer);
517 runtime->oss.buffer = vmalloc(runtime->oss.period_bytes);
518 runtime->oss.buffer_used = 0;
519 if (runtime->dma_area)
520 snd_pcm_format_set_silence(runtime->format, runtime->dma_area, bytes_to_samples(runtime, runtime->dma_bytes));
521
522 runtime->oss.period_frames = snd_pcm_alsa_frames(substream, oss_period_size);
523
524 err = 0;
525 failure:
526 kfree(sw_params);
527 kfree(params);
528 kfree(sparams);
529 return err;
530 }
531
532 static int snd_pcm_oss_get_active_substream(snd_pcm_oss_file_t *pcm_oss_file, snd_pcm_substream_t **r_substream)
533 {
534 int idx, err;
535 snd_pcm_substream_t *asubstream = NULL, *substream;
536
537 for (idx = 0; idx < 2; idx++) {
538 substream = pcm_oss_file->streams[idx];
539 if (substream == NULL)
540 continue;
541 if (asubstream == NULL)
542 asubstream = substream;
543 if (substream->runtime->oss.params) {
544 err = snd_pcm_oss_change_params(substream);
545 if (err < 0)
546 return err;
547 }
548 }
549 snd_assert(asubstream != NULL, return -EIO);
550 if (r_substream)
551 *r_substream = asubstream;
552 return 0;
553 }
554
555 static int snd_pcm_oss_prepare(snd_pcm_substream_t *substream)
556 {
557 int err;
558 snd_pcm_runtime_t *runtime = substream->runtime;
559
560 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_PREPARE, NULL);
561 if (err < 0) {
562 snd_printd("snd_pcm_oss_prepare: SNDRV_PCM_IOCTL_PREPARE failed\n");
563 return err;
564 }
565 runtime->oss.prepare = 0;
566 runtime->oss.prev_hw_ptr_interrupt = 0;
567 runtime->oss.period_ptr = 0;
568 runtime->oss.buffer_used = 0;
569
570 return 0;
571 }
572
573 static int snd_pcm_oss_make_ready(snd_pcm_substream_t *substream)
574 {
575 snd_pcm_runtime_t *runtime;
576 int err;
577
578 if (substream == NULL)
579 return 0;
580 runtime = substream->runtime;
581 if (runtime->oss.params) {
582 err = snd_pcm_oss_change_params(substream);
583 if (err < 0)
584 return err;
585 }
586 if (runtime->oss.prepare) {
587 err = snd_pcm_oss_prepare(substream);
588 if (err < 0)
589 return err;
590 }
591 return 0;
592 }
593
594 static int snd_pcm_oss_capture_position_fixup(snd_pcm_substream_t *substream, snd_pcm_sframes_t *delay)
595 {
596 snd_pcm_runtime_t *runtime;
597 snd_pcm_uframes_t frames;
598 int err = 0;
599
600 while (1) {
601 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DELAY, delay);
602 if (err < 0)
603 break;
604 runtime = substream->runtime;
605 if (*delay <= (snd_pcm_sframes_t)runtime->buffer_size)
606 break;
607 /* in case of overrun, skip whole periods like OSS/Linux driver does */
608 /* until avail(delay) <= buffer_size */
609 frames = (*delay - runtime->buffer_size) + runtime->period_size - 1;
610 frames /= runtime->period_size;
611 frames *= runtime->period_size;
612 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_FORWARD, &frames);
613 if (err < 0)
614 break;
615 }
616 return err;
617 }
618
619 snd_pcm_sframes_t snd_pcm_oss_write3(snd_pcm_substream_t *substream, const char *ptr, snd_pcm_uframes_t frames, int in_kernel)
620 {
621 snd_pcm_runtime_t *runtime = substream->runtime;
622 int ret;
623 while (1) {
624 if (runtime->status->state == SNDRV_PCM_STATE_XRUN ||
625 runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) {
626 #ifdef OSS_DEBUG
627 if (runtime->status->state == SNDRV_PCM_STATE_XRUN)
628 printk("pcm_oss: write: recovering from XRUN\n");
629 else
630 printk("pcm_oss: write: recovering from SUSPEND\n");
631 #endif
632 ret = snd_pcm_oss_prepare(substream);
633 if (ret < 0)
634 break;
635 }
636 if (in_kernel) {
637 mm_segment_t fs;
638 fs = snd_enter_user();
639 ret = snd_pcm_lib_write(substream, (void __user *)ptr, frames);
640 snd_leave_user(fs);
641 } else {
642 ret = snd_pcm_lib_write(substream, (void __user *)ptr, frames);
643 }
644 if (ret != -EPIPE && ret != -ESTRPIPE)
645 break;
646 /* test, if we can't store new data, because the stream */
647 /* has not been started */
648 if (runtime->status->state == SNDRV_PCM_STATE_PREPARED)
649 return -EAGAIN;
650 }
651 return ret;
652 }
653
654 snd_pcm_sframes_t snd_pcm_oss_read3(snd_pcm_substream_t *substream, char *ptr, snd_pcm_uframes_t frames, int in_kernel)
655 {
656 snd_pcm_runtime_t *runtime = substream->runtime;
657 snd_pcm_sframes_t delay;
658 int ret;
659 while (1) {
660 if (runtime->status->state == SNDRV_PCM_STATE_XRUN ||
661 runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) {
662 #ifdef OSS_DEBUG
663 if (runtime->status->state == SNDRV_PCM_STATE_XRUN)
664 printk("pcm_oss: read: recovering from XRUN\n");
665 else
666 printk("pcm_oss: read: recovering from SUSPEND\n");
667 #endif
668 ret = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DRAIN, NULL);
669 if (ret < 0)
670 break;
671 } else if (runtime->status->state == SNDRV_PCM_STATE_SETUP) {
672 ret = snd_pcm_oss_prepare(substream);
673 if (ret < 0)
674 break;
675 }
676 ret = snd_pcm_oss_capture_position_fixup(substream, &delay);
677 if (ret < 0)
678 break;
679 if (in_kernel) {
680 mm_segment_t fs;
681 fs = snd_enter_user();
682 ret = snd_pcm_lib_read(substream, (void __user *)ptr, frames);
683 snd_leave_user(fs);
684 } else {
685 ret = snd_pcm_lib_read(substream, (void __user *)ptr, frames);
686 }
687 if (ret == -EPIPE) {
688 if (runtime->status->state == SNDRV_PCM_STATE_DRAINING) {
689 ret = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DROP, NULL);
690 if (ret < 0)
691 break;
692 }
693 continue;
694 }
695 if (ret != -ESTRPIPE)
696 break;
697 }
698 return ret;
699 }
700
701 snd_pcm_sframes_t snd_pcm_oss_writev3(snd_pcm_substream_t *substream, void **bufs, snd_pcm_uframes_t frames, int in_kernel)
702 {
703 snd_pcm_runtime_t *runtime = substream->runtime;
704 int ret;
705 while (1) {
706 if (runtime->status->state == SNDRV_PCM_STATE_XRUN ||
707 runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) {
708 #ifdef OSS_DEBUG
709 if (runtime->status->state == SNDRV_PCM_STATE_XRUN)
710 printk("pcm_oss: writev: recovering from XRUN\n");
711 else
712 printk("pcm_oss: writev: recovering from SUSPEND\n");
713 #endif
714 ret = snd_pcm_oss_prepare(substream);
715 if (ret < 0)
716 break;
717 }
718 if (in_kernel) {
719 mm_segment_t fs;
720 fs = snd_enter_user();
721 ret = snd_pcm_lib_writev(substream, (void __user **)bufs, frames);
722 snd_leave_user(fs);
723 } else {
724 ret = snd_pcm_lib_writev(substream, (void __user **)bufs, frames);
725 }
726 if (ret != -EPIPE && ret != -ESTRPIPE)
727 break;
728
729 /* test, if we can't store new data, because the stream */
730 /* has not been started */
731 if (runtime->status->state == SNDRV_PCM_STATE_PREPARED)
732 return -EAGAIN;
733 }
734 return ret;
735 }
736
737 snd_pcm_sframes_t snd_pcm_oss_readv3(snd_pcm_substream_t *substream, void **bufs, snd_pcm_uframes_t frames, int in_kernel)
738 {
739 snd_pcm_runtime_t *runtime = substream->runtime;
740 int ret;
741 while (1) {
742 if (runtime->status->state == SNDRV_PCM_STATE_XRUN ||
743 runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) {
744 #ifdef OSS_DEBUG
745 if (runtime->status->state == SNDRV_PCM_STATE_XRUN)
746 printk("pcm_oss: readv: recovering from XRUN\n");
747 else
748 printk("pcm_oss: readv: recovering from SUSPEND\n");
749 #endif
750 ret = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DRAIN, NULL);
751 if (ret < 0)
752 break;
753 } else if (runtime->status->state == SNDRV_PCM_STATE_SETUP) {
754 ret = snd_pcm_oss_prepare(substream);
755 if (ret < 0)
756 break;
757 }
758 if (in_kernel) {
759 mm_segment_t fs;
760 fs = snd_enter_user();
761 ret = snd_pcm_lib_readv(substream, (void __user **)bufs, frames);
762 snd_leave_user(fs);
763 } else {
764 ret = snd_pcm_lib_readv(substream, (void __user **)bufs, frames);
765 }
766 if (ret != -EPIPE && ret != -ESTRPIPE)
767 break;
768 }
769 return ret;
770 }
771
772 static ssize_t snd_pcm_oss_write2(snd_pcm_substream_t *substream, const char *buf, size_t bytes, int in_kernel)
773 {
774 snd_pcm_runtime_t *runtime = substream->runtime;
775 snd_pcm_sframes_t frames, frames1;
776 if (runtime->oss.plugin_first) {
777 snd_pcm_plugin_channel_t *channels;
778 size_t oss_frame_bytes = (runtime->oss.plugin_first->src_width * runtime->oss.plugin_first->src_format.channels) / 8;
779 if (!in_kernel) {
780 if (copy_from_user(runtime->oss.buffer, (const char __user *)buf, bytes))
781 return -EFAULT;
782 buf = runtime->oss.buffer;
783 }
784 frames = bytes / oss_frame_bytes;
785 frames1 = snd_pcm_plug_client_channels_buf(substream, (char *)buf, frames, &channels);
786 if (frames1 < 0)
787 return frames1;
788 frames1 = snd_pcm_plug_write_transfer(substream, channels, frames1);
789 if (frames1 <= 0)
790 return frames1;
791 bytes = frames1 * oss_frame_bytes;
792 } else {
793 frames = bytes_to_frames(runtime, bytes);
794 frames1 = snd_pcm_oss_write3(substream, buf, frames, in_kernel);
795 if (frames1 <= 0)
796 return frames1;
797 bytes = frames_to_bytes(runtime, frames1);
798 }
799 return bytes;
800 }
801
802 static ssize_t snd_pcm_oss_write1(snd_pcm_substream_t *substream, const char __user *buf, size_t bytes)
803 {
804 size_t xfer = 0;
805 ssize_t tmp;
806 snd_pcm_runtime_t *runtime = substream->runtime;
807
808 if (atomic_read(&runtime->mmap_count))
809 return -ENXIO;
810
811 if ((tmp = snd_pcm_oss_make_ready(substream)) < 0)
812 return tmp;
813 while (bytes > 0) {
814 if (bytes < runtime->oss.period_bytes || runtime->oss.buffer_used > 0) {
815 tmp = bytes;
816 if (tmp + runtime->oss.buffer_used > runtime->oss.period_bytes)
817 tmp = runtime->oss.period_bytes - runtime->oss.buffer_used;
818 if (tmp > 0) {
819 if (copy_from_user(runtime->oss.buffer + runtime->oss.buffer_used, buf, tmp))
820 return xfer > 0 ? (snd_pcm_sframes_t)xfer : -EFAULT;
821 }
822 runtime->oss.buffer_used += tmp;
823 buf += tmp;
824 bytes -= tmp;
825 xfer += tmp;
826 if ((substream->oss.setup != NULL && substream->oss.setup->partialfrag) ||
827 runtime->oss.buffer_used == runtime->oss.period_bytes) {
828 tmp = snd_pcm_oss_write2(substream, runtime->oss.buffer + runtime->oss.period_ptr,
829 runtime->oss.buffer_used - runtime->oss.period_ptr, 1);
830 if (tmp <= 0)
831 return xfer > 0 ? (snd_pcm_sframes_t)xfer : tmp;
832 runtime->oss.bytes += tmp;
833 runtime->oss.period_ptr += tmp;
834 runtime->oss.period_ptr %= runtime->oss.period_bytes;
835 if (runtime->oss.period_ptr == 0 ||
836 runtime->oss.period_ptr == runtime->oss.buffer_used)
837 runtime->oss.buffer_used = 0;
838 else if ((substream->ffile->f_flags & O_NONBLOCK) != 0)
839 return xfer > 0 ? xfer : -EAGAIN;
840 }
841 } else {
842 tmp = snd_pcm_oss_write2(substream, (const char *)buf, runtime->oss.period_bytes, 0);
843 if (tmp <= 0)
844 return xfer > 0 ? (snd_pcm_sframes_t)xfer : tmp;
845 runtime->oss.bytes += tmp;
846 buf += tmp;
847 bytes -= tmp;
848 xfer += tmp;
849 if ((substream->ffile->f_flags & O_NONBLOCK) != 0 &&
850 tmp != runtime->oss.period_bytes)
851 break;
852 }
853 }
854 return xfer;
855 }
856
857 static ssize_t snd_pcm_oss_read2(snd_pcm_substream_t *substream, char *buf, size_t bytes, int in_kernel)
858 {
859 snd_pcm_runtime_t *runtime = substream->runtime;
860 snd_pcm_sframes_t frames, frames1;
861 char __user *final_dst = (char __user *)buf;
862 if (runtime->oss.plugin_first) {
863 snd_pcm_plugin_channel_t *channels;
864 size_t oss_frame_bytes = (runtime->oss.plugin_last->dst_width * runtime->oss.plugin_last->dst_format.channels) / 8;
865 if (!in_kernel)
866 buf = runtime->oss.buffer;
867 frames = bytes / oss_frame_bytes;
868 frames1 = snd_pcm_plug_client_channels_buf(substream, buf, frames, &channels);
869 if (frames1 < 0)
870 return frames1;
871 frames1 = snd_pcm_plug_read_transfer(substream, channels, frames1);
872 if (frames1 <= 0)
873 return frames1;
874 bytes = frames1 * oss_frame_bytes;
875 if (!in_kernel && copy_to_user(final_dst, buf, bytes))
876 return -EFAULT;
877 } else {
878 frames = bytes_to_frames(runtime, bytes);
879 frames1 = snd_pcm_oss_read3(substream, buf, frames, in_kernel);
880 if (frames1 <= 0)
881 return frames1;
882 bytes = frames_to_bytes(runtime, frames1);
883 }
884 return bytes;
885 }
886
887 static ssize_t snd_pcm_oss_read1(snd_pcm_substream_t *substream, char __user *buf, size_t bytes)
888 {
889 size_t xfer = 0;
890 ssize_t tmp;
891 snd_pcm_runtime_t *runtime = substream->runtime;
892
893 if (atomic_read(&runtime->mmap_count))
894 return -ENXIO;
895
896 if ((tmp = snd_pcm_oss_make_ready(substream)) < 0)
897 return tmp;
898 while (bytes > 0) {
899 if (bytes < runtime->oss.period_bytes || runtime->oss.buffer_used > 0) {
900 if (runtime->oss.buffer_used == 0) {
901 tmp = snd_pcm_oss_read2(substream, runtime->oss.buffer, runtime->oss.period_bytes, 1);
902 if (tmp <= 0)
903 return xfer > 0 ? (snd_pcm_sframes_t)xfer : tmp;
904 runtime->oss.bytes += tmp;
905 runtime->oss.period_ptr = tmp;
906 runtime->oss.buffer_used = tmp;
907 }
908 tmp = bytes;
909 if ((size_t) tmp > runtime->oss.buffer_used)
910 tmp = runtime->oss.buffer_used;
911 if (copy_to_user(buf, runtime->oss.buffer + (runtime->oss.period_ptr - runtime->oss.buffer_used), tmp))
912 return xfer > 0 ? (snd_pcm_sframes_t)xfer : -EFAULT;
913 buf += tmp;
914 bytes -= tmp;
915 xfer += tmp;
916 runtime->oss.buffer_used -= tmp;
917 } else {
918 tmp = snd_pcm_oss_read2(substream, (char *)buf, runtime->oss.period_bytes, 0);
919 if (tmp <= 0)
920 return xfer > 0 ? (snd_pcm_sframes_t)xfer : tmp;
921 runtime->oss.bytes += tmp;
922 buf += tmp;
923 bytes -= tmp;
924 xfer += tmp;
925 }
926 }
927 return xfer;
928 }
929
930 static int snd_pcm_oss_reset(snd_pcm_oss_file_t *pcm_oss_file)
931 {
932 snd_pcm_substream_t *substream;
933
934 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
935 if (substream != NULL) {
936 snd_pcm_kernel_playback_ioctl(substream, SNDRV_PCM_IOCTL_DROP, NULL);
937 substream->runtime->oss.prepare = 1;
938 }
939 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
940 if (substream != NULL) {
941 snd_pcm_kernel_capture_ioctl(substream, SNDRV_PCM_IOCTL_DROP, NULL);
942 substream->runtime->oss.prepare = 1;
943 }
944 return 0;
945 }
946
947 static int snd_pcm_oss_post(snd_pcm_oss_file_t *pcm_oss_file)
948 {
949 snd_pcm_substream_t *substream;
950 int err;
951
952 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
953 if (substream != NULL) {
954 if ((err = snd_pcm_oss_make_ready(substream)) < 0)
955 return err;
956 snd_pcm_kernel_playback_ioctl(substream, SNDRV_PCM_IOCTL_START, NULL);
957 }
958 /* note: all errors from the start action are ignored */
959 /* OSS apps do not know, how to handle them */
960 return 0;
961 }
962
963 static int snd_pcm_oss_sync1(snd_pcm_substream_t *substream, size_t size)
964 {
965 snd_pcm_runtime_t *runtime;
966 ssize_t result = 0;
967 long res;
968 wait_queue_t wait;
969
970 runtime = substream->runtime;
971 init_waitqueue_entry(&wait, current);
972 add_wait_queue(&runtime->sleep, &wait);
973 #ifdef OSS_DEBUG
974 printk("sync1: size = %li\n", size);
975 #endif
976 while (1) {
977 result = snd_pcm_oss_write2(substream, runtime->oss.buffer, size, 1);
978 if (result > 0) {
979 runtime->oss.buffer_used = 0;
980 result = 0;
981 break;
982 }
983 if (result != 0 && result != -EAGAIN)
984 break;
985 result = 0;
986 set_current_state(TASK_INTERRUPTIBLE);
987 snd_pcm_stream_lock_irq(substream);
988 res = runtime->status->state;
989 snd_pcm_stream_unlock_irq(substream);
990 if (res != SNDRV_PCM_STATE_RUNNING) {
991 set_current_state(TASK_RUNNING);
992 break;
993 }
994 res = schedule_timeout(10 * HZ);
995 if (signal_pending(current)) {
996 result = -ERESTARTSYS;
997 break;
998 }
999 if (res == 0) {
1000 snd_printk(KERN_ERR "OSS sync error - DMA timeout\n");
1001 result = -EIO;
1002 break;
1003 }
1004 }
1005 remove_wait_queue(&runtime->sleep, &wait);
1006 return result;
1007 }
1008
1009 static int snd_pcm_oss_sync(snd_pcm_oss_file_t *pcm_oss_file)
1010 {
1011 int err = 0;
1012 unsigned int saved_f_flags;
1013 snd_pcm_substream_t *substream;
1014 snd_pcm_runtime_t *runtime;
1015 snd_pcm_format_t format;
1016 unsigned long width;
1017 size_t size;
1018
1019 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
1020 if (substream != NULL) {
1021 runtime = substream->runtime;
1022 if (atomic_read(&runtime->mmap_count))
1023 goto __direct;
1024 if ((err = snd_pcm_oss_make_ready(substream)) < 0)
1025 return err;
1026 format = snd_pcm_oss_format_from(runtime->oss.format);
1027 width = snd_pcm_format_physical_width(format);
1028 if (runtime->oss.buffer_used > 0) {
1029 #ifdef OSS_DEBUG
1030 printk("sync: buffer_used\n");
1031 #endif
1032 size = (8 * (runtime->oss.period_bytes - runtime->oss.buffer_used) + 7) / width;
1033 snd_pcm_format_set_silence(format,
1034 runtime->oss.buffer + runtime->oss.buffer_used,
1035 size);
1036 err = snd_pcm_oss_sync1(substream, runtime->oss.period_bytes);
1037 if (err < 0)
1038 return err;
1039 } else if (runtime->oss.period_ptr > 0) {
1040 #ifdef OSS_DEBUG
1041 printk("sync: period_ptr\n");
1042 #endif
1043 size = runtime->oss.period_bytes - runtime->oss.period_ptr;
1044 snd_pcm_format_set_silence(format,
1045 runtime->oss.buffer,
1046 size * 8 / width);
1047 err = snd_pcm_oss_sync1(substream, size);
1048 if (err < 0)
1049 return err;
1050 }
1051 /*
1052 * The ALSA's period might be a bit large than OSS one.
1053 * Fill the remain portion of ALSA period with zeros.
1054 */
1055 size = runtime->control->appl_ptr % runtime->period_size;
1056 if (size > 0) {
1057 size = runtime->period_size - size;
1058 if (runtime->access == SNDRV_PCM_ACCESS_RW_INTERLEAVED) {
1059 size = (runtime->frame_bits * size) / 8;
1060 while (size > 0) {
1061 mm_segment_t fs;
1062 size_t size1 = size < runtime->oss.period_bytes ? size : runtime->oss.period_bytes;
1063 size -= size1;
1064 size1 *= 8;
1065 size1 /= runtime->sample_bits;
1066 snd_pcm_format_set_silence(runtime->format,
1067 runtime->oss.buffer,
1068 size1);
1069 fs = snd_enter_user();
1070 snd_pcm_lib_write(substream, (void __user *)runtime->oss.buffer, size1);
1071 snd_leave_user(fs);
1072 }
1073 } else if (runtime->access == SNDRV_PCM_ACCESS_RW_NONINTERLEAVED) {
1074 void __user *buffers[runtime->channels];
1075 memset(buffers, 0, runtime->channels * sizeof(void *));
1076 snd_pcm_lib_writev(substream, buffers, size);
1077 }
1078 }
1079 /*
1080 * finish sync: drain the buffer
1081 */
1082 __direct:
1083 saved_f_flags = substream->ffile->f_flags;
1084 substream->ffile->f_flags &= ~O_NONBLOCK;
1085 err = snd_pcm_kernel_playback_ioctl(substream, SNDRV_PCM_IOCTL_DRAIN, NULL);
1086 substream->ffile->f_flags = saved_f_flags;
1087 if (err < 0)
1088 return err;
1089 runtime->oss.prepare = 1;
1090 }
1091
1092 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
1093 if (substream != NULL) {
1094 if ((err = snd_pcm_oss_make_ready(substream)) < 0)
1095 return err;
1096 runtime = substream->runtime;
1097 err = snd_pcm_kernel_capture_ioctl(substream, SNDRV_PCM_IOCTL_DROP, NULL);
1098 if (err < 0)
1099 return err;
1100 runtime->oss.buffer_used = 0;
1101 runtime->oss.prepare = 1;
1102 }
1103 return 0;
1104 }
1105
1106 static int snd_pcm_oss_set_rate(snd_pcm_oss_file_t *pcm_oss_file, int rate)
1107 {
1108 int idx;
1109
1110 for (idx = 1; idx >= 0; --idx) {
1111 snd_pcm_substream_t *substream = pcm_oss_file->streams[idx];
1112 snd_pcm_runtime_t *runtime;
1113 if (substream == NULL)
1114 continue;
1115 runtime = substream->runtime;
1116 if (rate < 1000)
1117 rate = 1000;
1118 else if (rate > 192000)
1119 rate = 192000;
1120 if (runtime->oss.rate != rate) {
1121 runtime->oss.params = 1;
1122 runtime->oss.rate = rate;
1123 }
1124 }
1125 return snd_pcm_oss_get_rate(pcm_oss_file);
1126 }
1127
1128 static int snd_pcm_oss_get_rate(snd_pcm_oss_file_t *pcm_oss_file)
1129 {
1130 snd_pcm_substream_t *substream;
1131 int err;
1132
1133 if ((err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream)) < 0)
1134 return err;
1135 return substream->runtime->oss.rate;
1136 }
1137
1138 static int snd_pcm_oss_set_channels(snd_pcm_oss_file_t *pcm_oss_file, unsigned int channels)
1139 {
1140 int idx;
1141 if (channels < 1)
1142 channels = 1;
1143 if (channels > 128)
1144 return -EINVAL;
1145 for (idx = 1; idx >= 0; --idx) {
1146 snd_pcm_substream_t *substream = pcm_oss_file->streams[idx];
1147 snd_pcm_runtime_t *runtime;
1148 if (substream == NULL)
1149 continue;
1150 runtime = substream->runtime;
1151 if (runtime->oss.channels != channels) {
1152 runtime->oss.params = 1;
1153 runtime->oss.channels = channels;
1154 }
1155 }
1156 return snd_pcm_oss_get_channels(pcm_oss_file);
1157 }
1158
1159 static int snd_pcm_oss_get_channels(snd_pcm_oss_file_t *pcm_oss_file)
1160 {
1161 snd_pcm_substream_t *substream;
1162 int err;
1163
1164 if ((err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream)) < 0)
1165 return err;
1166 return substream->runtime->oss.channels;
1167 }
1168
1169 static int snd_pcm_oss_get_block_size(snd_pcm_oss_file_t *pcm_oss_file)
1170 {
1171 snd_pcm_substream_t *substream;
1172 int err;
1173
1174 if ((err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream)) < 0)
1175 return err;
1176 return substream->runtime->oss.period_bytes;
1177 }
1178
1179 static int snd_pcm_oss_get_formats(snd_pcm_oss_file_t *pcm_oss_file)
1180 {
1181 snd_pcm_substream_t *substream;
1182 int err;
1183 int direct;
1184 snd_pcm_hw_params_t *params;
1185 unsigned int formats = 0;
1186 snd_mask_t format_mask;
1187 int fmt;
1188
1189 if ((err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream)) < 0)
1190 return err;
1191 if (atomic_read(&substream->runtime->mmap_count)) {
1192 direct = 1;
1193 } else {
1194 snd_pcm_oss_setup_t *setup = substream->oss.setup;
1195 direct = (setup != NULL && setup->direct);
1196 }
1197 if (!direct)
1198 return AFMT_MU_LAW | AFMT_U8 |
1199 AFMT_S16_LE | AFMT_S16_BE |
1200 AFMT_S8 | AFMT_U16_LE |
1201 AFMT_U16_BE;
1202 params = kmalloc(sizeof(*params), GFP_KERNEL);
1203 if (!params)
1204 return -ENOMEM;
1205 _snd_pcm_hw_params_any(params);
1206 err = snd_pcm_hw_refine(substream, params);
1207 format_mask = *hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT);
1208 kfree(params);
1209 snd_assert(err >= 0, return err);
1210 for (fmt = 0; fmt < 32; ++fmt) {
1211 if (snd_mask_test(&format_mask, fmt)) {
1212 int f = snd_pcm_oss_format_to(fmt);
1213 if (f >= 0)
1214 formats |= f;
1215 }
1216 }
1217 return formats;
1218 }
1219
1220 static int snd_pcm_oss_set_format(snd_pcm_oss_file_t *pcm_oss_file, int format)
1221 {
1222 int formats, idx;
1223
1224 if (format != AFMT_QUERY) {
1225 formats = snd_pcm_oss_get_formats(pcm_oss_file);
1226 if (!(formats & format))
1227 format = AFMT_U8;
1228 for (idx = 1; idx >= 0; --idx) {
1229 snd_pcm_substream_t *substream = pcm_oss_file->streams[idx];
1230 snd_pcm_runtime_t *runtime;
1231 if (substream == NULL)
1232 continue;
1233 runtime = substream->runtime;
1234 if (runtime->oss.format != format) {
1235 runtime->oss.params = 1;
1236 runtime->oss.format = format;
1237 }
1238 }
1239 }
1240 return snd_pcm_oss_get_format(pcm_oss_file);
1241 }
1242
1243 static int snd_pcm_oss_get_format(snd_pcm_oss_file_t *pcm_oss_file)
1244 {
1245 snd_pcm_substream_t *substream;
1246 int err;
1247
1248 if ((err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream)) < 0)
1249 return err;
1250 return substream->runtime->oss.format;
1251 }
1252
1253 static int snd_pcm_oss_set_subdivide1(snd_pcm_substream_t *substream, int subdivide)
1254 {
1255 snd_pcm_runtime_t *runtime;
1256
1257 if (substream == NULL)
1258 return 0;
1259 runtime = substream->runtime;
1260 if (subdivide == 0) {
1261 subdivide = runtime->oss.subdivision;
1262 if (subdivide == 0)
1263 subdivide = 1;
1264 return subdivide;
1265 }
1266 if (runtime->oss.subdivision || runtime->oss.fragshift)
1267 return -EINVAL;
1268 if (subdivide != 1 && subdivide != 2 && subdivide != 4 &&
1269 subdivide != 8 && subdivide != 16)
1270 return -EINVAL;
1271 runtime->oss.subdivision = subdivide;
1272 runtime->oss.params = 1;
1273 return subdivide;
1274 }
1275
1276 static int snd_pcm_oss_set_subdivide(snd_pcm_oss_file_t *pcm_oss_file, int subdivide)
1277 {
1278 int err = -EINVAL, idx;
1279
1280 for (idx = 1; idx >= 0; --idx) {
1281 snd_pcm_substream_t *substream = pcm_oss_file->streams[idx];
1282 if (substream == NULL)
1283 continue;
1284 if ((err = snd_pcm_oss_set_subdivide1(substream, subdivide)) < 0)
1285 return err;
1286 }
1287 return err;
1288 }
1289
1290 static int snd_pcm_oss_set_fragment1(snd_pcm_substream_t *substream, unsigned int val)
1291 {
1292 snd_pcm_runtime_t *runtime;
1293
1294 if (substream == NULL)
1295 return 0;
1296 runtime = substream->runtime;
1297 if (runtime->oss.subdivision || runtime->oss.fragshift)
1298 return -EINVAL;
1299 runtime->oss.fragshift = val & 0xffff;
1300 runtime->oss.maxfrags = (val >> 16) & 0xffff;
1301 if (runtime->oss.fragshift < 4) /* < 16 */
1302 runtime->oss.fragshift = 4;
1303 if (runtime->oss.maxfrags < 2)
1304 runtime->oss.maxfrags = 2;
1305 runtime->oss.params = 1;
1306 return 0;
1307 }
1308
1309 static int snd_pcm_oss_set_fragment(snd_pcm_oss_file_t *pcm_oss_file, unsigned int val)
1310 {
1311 int err = -EINVAL, idx;
1312
1313 for (idx = 1; idx >= 0; --idx) {
1314 snd_pcm_substream_t *substream = pcm_oss_file->streams[idx];
1315 if (substream == NULL)
1316 continue;
1317 if ((err = snd_pcm_oss_set_fragment1(substream, val)) < 0)
1318 return err;
1319 }
1320 return err;
1321 }
1322
1323 static int snd_pcm_oss_nonblock(struct file * file)
1324 {
1325 file->f_flags |= O_NONBLOCK;
1326 return 0;
1327 }
1328
1329 static int snd_pcm_oss_get_caps1(snd_pcm_substream_t *substream, int res)
1330 {
1331
1332 if (substream == NULL) {
1333 res &= ~DSP_CAP_DUPLEX;
1334 return res;
1335 }
1336 #ifdef DSP_CAP_MULTI
1337 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
1338 if (substream->pstr->substream_count > 1)
1339 res |= DSP_CAP_MULTI;
1340 #endif
1341 /* DSP_CAP_REALTIME is set all times: */
1342 /* all ALSA drivers can return actual pointer in ring buffer */
1343 #if defined(DSP_CAP_REALTIME) && 0
1344 {
1345 snd_pcm_runtime_t *runtime = substream->runtime;
1346 if (runtime->info & (SNDRV_PCM_INFO_BLOCK_TRANSFER|SNDRV_PCM_INFO_BATCH))
1347 res &= ~DSP_CAP_REALTIME;
1348 }
1349 #endif
1350 return res;
1351 }
1352
1353 static int snd_pcm_oss_get_caps(snd_pcm_oss_file_t *pcm_oss_file)
1354 {
1355 int result, idx;
1356
1357 result = DSP_CAP_TRIGGER | DSP_CAP_MMAP | DSP_CAP_DUPLEX | DSP_CAP_REALTIME;
1358 for (idx = 0; idx < 2; idx++) {
1359 snd_pcm_substream_t *substream = pcm_oss_file->streams[idx];
1360 result = snd_pcm_oss_get_caps1(substream, result);
1361 }
1362 result |= 0x0001; /* revision - same as SB AWE 64 */
1363 return result;
1364 }
1365
1366 static void snd_pcm_oss_simulate_fill(snd_pcm_substream_t *substream, snd_pcm_uframes_t hw_ptr)
1367 {
1368 snd_pcm_runtime_t *runtime = substream->runtime;
1369 snd_pcm_uframes_t appl_ptr;
1370 appl_ptr = hw_ptr + runtime->buffer_size;
1371 appl_ptr %= runtime->boundary;
1372 runtime->control->appl_ptr = appl_ptr;
1373 }
1374
1375 static int snd_pcm_oss_set_trigger(snd_pcm_oss_file_t *pcm_oss_file, int trigger)
1376 {
1377 snd_pcm_runtime_t *runtime;
1378 snd_pcm_substream_t *psubstream = NULL, *csubstream = NULL;
1379 int err, cmd;
1380
1381 #ifdef OSS_DEBUG
1382 printk("pcm_oss: trigger = 0x%x\n", trigger);
1383 #endif
1384
1385 psubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
1386 csubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
1387
1388 if (psubstream) {
1389 if ((err = snd_pcm_oss_make_ready(psubstream)) < 0)
1390 return err;
1391 }
1392 if (csubstream) {
1393 if ((err = snd_pcm_oss_make_ready(csubstream)) < 0)
1394 return err;
1395 }
1396 if (psubstream) {
1397 runtime = psubstream->runtime;
1398 if (trigger & PCM_ENABLE_OUTPUT) {
1399 if (runtime->oss.trigger)
1400 goto _skip1;
1401 if (atomic_read(&psubstream->runtime->mmap_count))
1402 snd_pcm_oss_simulate_fill(psubstream, runtime->hw_ptr_interrupt);
1403 runtime->oss.trigger = 1;
1404 runtime->start_threshold = 1;
1405 cmd = SNDRV_PCM_IOCTL_START;
1406 } else {
1407 if (!runtime->oss.trigger)
1408 goto _skip1;
1409 runtime->oss.trigger = 0;
1410 runtime->start_threshold = runtime->boundary;
1411 cmd = SNDRV_PCM_IOCTL_DROP;
1412 runtime->oss.prepare = 1;
1413 }
1414 err = snd_pcm_kernel_playback_ioctl(psubstream, cmd, NULL);
1415 if (err < 0)
1416 return err;
1417 }
1418 _skip1:
1419 if (csubstream) {
1420 runtime = csubstream->runtime;
1421 if (trigger & PCM_ENABLE_INPUT) {
1422 if (runtime->oss.trigger)
1423 goto _skip2;
1424 runtime->oss.trigger = 1;
1425 runtime->start_threshold = 1;
1426 cmd = SNDRV_PCM_IOCTL_START;
1427 } else {
1428 if (!runtime->oss.trigger)
1429 goto _skip2;
1430 runtime->oss.trigger = 0;
1431 runtime->start_threshold = runtime->boundary;
1432 cmd = SNDRV_PCM_IOCTL_DROP;
1433 runtime->oss.prepare = 1;
1434 }
1435 err = snd_pcm_kernel_capture_ioctl(csubstream, cmd, NULL);
1436 if (err < 0)
1437 return err;
1438 }
1439 _skip2:
1440 return 0;
1441 }
1442
1443 static int snd_pcm_oss_get_trigger(snd_pcm_oss_file_t *pcm_oss_file)
1444 {
1445 snd_pcm_substream_t *psubstream = NULL, *csubstream = NULL;
1446 int result = 0;
1447
1448 psubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
1449 csubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
1450 if (psubstream && psubstream->runtime && psubstream->runtime->oss.trigger)
1451 result |= PCM_ENABLE_OUTPUT;
1452 if (csubstream && csubstream->runtime && csubstream->runtime->oss.trigger)
1453 result |= PCM_ENABLE_INPUT;
1454 return result;
1455 }
1456
1457 static int snd_pcm_oss_get_odelay(snd_pcm_oss_file_t *pcm_oss_file)
1458 {
1459 snd_pcm_substream_t *substream;
1460 snd_pcm_runtime_t *runtime;
1461 snd_pcm_sframes_t delay;
1462 int err;
1463
1464 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
1465 if (substream == NULL)
1466 return -EINVAL;
1467 if ((err = snd_pcm_oss_make_ready(substream)) < 0)
1468 return err;
1469 runtime = substream->runtime;
1470 if (runtime->oss.params || runtime->oss.prepare)
1471 return 0;
1472 err = snd_pcm_kernel_playback_ioctl(substream, SNDRV_PCM_IOCTL_DELAY, &delay);
1473 if (err == -EPIPE)
1474 delay = 0; /* hack for broken OSS applications */
1475 else if (err < 0)
1476 return err;
1477 return snd_pcm_oss_bytes(substream, delay);
1478 }
1479
1480 static int snd_pcm_oss_get_ptr(snd_pcm_oss_file_t *pcm_oss_file, int stream, struct count_info __user * _info)
1481 {
1482 snd_pcm_substream_t *substream;
1483 snd_pcm_runtime_t *runtime;
1484 snd_pcm_sframes_t delay;
1485 int fixup;
1486 struct count_info info;
1487 int err;
1488
1489 if (_info == NULL)
1490 return -EFAULT;
1491 substream = pcm_oss_file->streams[stream];
1492 if (substream == NULL)
1493 return -EINVAL;
1494 if ((err = snd_pcm_oss_make_ready(substream)) < 0)
1495 return err;
1496 runtime = substream->runtime;
1497 if (runtime->oss.params || runtime->oss.prepare) {
1498 memset(&info, 0, sizeof(info));
1499 if (copy_to_user(_info, &info, sizeof(info)))
1500 return -EFAULT;
1501 return 0;
1502 }
1503 if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
1504 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DELAY, &delay);
1505 if (err == -EPIPE || err == -ESTRPIPE || (! err && delay < 0)) {
1506 err = 0;
1507 delay = 0;
1508 fixup = 0;
1509 } else {
1510 fixup = runtime->oss.buffer_used;
1511 }
1512 } else {
1513 err = snd_pcm_oss_capture_position_fixup(substream, &delay);
1514 fixup = -runtime->oss.buffer_used;
1515 }
1516 if (err < 0)
1517 return err;
1518 info.ptr = snd_pcm_oss_bytes(substream, runtime->status->hw_ptr % runtime->buffer_size);
1519 if (atomic_read(&runtime->mmap_count)) {
1520 snd_pcm_sframes_t n;
1521 n = (delay = runtime->hw_ptr_interrupt) - runtime->oss.prev_hw_ptr_interrupt;
1522 if (n < 0)
1523 n += runtime->boundary;
1524 info.blocks = n / runtime->period_size;
1525 runtime->oss.prev_hw_ptr_interrupt = delay;
1526 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
1527 snd_pcm_oss_simulate_fill(substream, delay);
1528 info.bytes = snd_pcm_oss_bytes(substream, runtime->status->hw_ptr) & INT_MAX;
1529 } else {
1530 delay = snd_pcm_oss_bytes(substream, delay) + fixup;
1531 info.blocks = delay / runtime->oss.period_bytes;
1532 if (stream == SNDRV_PCM_STREAM_PLAYBACK)
1533 info.bytes = (runtime->oss.bytes - delay) & INT_MAX;
1534 else
1535 info.bytes = (runtime->oss.bytes + delay) & INT_MAX;
1536 }
1537 if (copy_to_user(_info, &info, sizeof(info)))
1538 return -EFAULT;
1539 return 0;
1540 }
1541
1542 static int snd_pcm_oss_get_space(snd_pcm_oss_file_t *pcm_oss_file, int stream, struct audio_buf_info __user *_info)
1543 {
1544 snd_pcm_substream_t *substream;
1545 snd_pcm_runtime_t *runtime;
1546 snd_pcm_sframes_t avail;
1547 int fixup;
1548 struct audio_buf_info info;
1549 int err;
1550
1551 if (_info == NULL)
1552 return -EFAULT;
1553 substream = pcm_oss_file->streams[stream];
1554 if (substream == NULL)
1555 return -EINVAL;
1556 runtime = substream->runtime;
1557
1558 if (runtime->oss.params &&
1559 (err = snd_pcm_oss_change_params(substream)) < 0)
1560 return err;
1561
1562 info.fragsize = runtime->oss.period_bytes;
1563 info.fragstotal = runtime->periods;
1564 if (runtime->oss.prepare) {
1565 if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
1566 info.bytes = runtime->oss.period_bytes * runtime->oss.periods;
1567 info.fragments = runtime->oss.periods;
1568 } else {
1569 info.bytes = 0;
1570 info.fragments = 0;
1571 }
1572 } else {
1573 if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
1574 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DELAY, &avail);
1575 if (err == -EPIPE || err == -ESTRPIPE || (! err && avail < 0)) {
1576 avail = runtime->buffer_size;
1577 err = 0;
1578 fixup = 0;
1579 } else {
1580 avail = runtime->buffer_size - avail;
1581 fixup = -runtime->oss.buffer_used;
1582 }
1583 } else {
1584 err = snd_pcm_oss_capture_position_fixup(substream, &avail);
1585 fixup = runtime->oss.buffer_used;
1586 }
1587 if (err < 0)
1588 return err;
1589 info.bytes = snd_pcm_oss_bytes(substream, avail) + fixup;
1590 info.fragments = info.bytes / runtime->oss.period_bytes;
1591 }
1592
1593 #ifdef OSS_DEBUG
1594 printk("pcm_oss: space: bytes = %i, fragments = %i, fragstotal = %i, fragsize = %i\n", info.bytes, info.fragments, info.fragstotal, info.fragsize);
1595 #endif
1596 if (copy_to_user(_info, &info, sizeof(info)))
1597 return -EFAULT;
1598 return 0;
1599 }
1600
1601 static int snd_pcm_oss_get_mapbuf(snd_pcm_oss_file_t *pcm_oss_file, int stream, struct buffmem_desc __user * _info)
1602 {
1603 // it won't be probably implemented
1604 // snd_printd("TODO: snd_pcm_oss_get_mapbuf\n");
1605 return -EINVAL;
1606 }
1607
1608 static snd_pcm_oss_setup_t *snd_pcm_oss_look_for_setup(snd_pcm_t *pcm, int stream, const char *task_name)
1609 {
1610 const char *ptr, *ptrl;
1611 snd_pcm_oss_setup_t *setup;
1612
1613 down(&pcm->streams[stream].oss.setup_mutex);
1614 for (setup = pcm->streams[stream].oss.setup_list; setup; setup = setup->next) {
1615 if (!strcmp(setup->task_name, task_name)) {
1616 up(&pcm->streams[stream].oss.setup_mutex);
1617 return setup;
1618 }
1619 }
1620 ptr = ptrl = task_name;
1621 while (*ptr) {
1622 if (*ptr == '/')
1623 ptrl = ptr + 1;
1624 ptr++;
1625 }
1626 if (ptrl == task_name) {
1627 goto __not_found;
1628 return NULL;
1629 }
1630 for (setup = pcm->streams[stream].oss.setup_list; setup; setup = setup->next) {
1631 if (!strcmp(setup->task_name, ptrl)) {
1632 up(&pcm->streams[stream].oss.setup_mutex);
1633 return setup;
1634 }
1635 }
1636 __not_found:
1637 up(&pcm->streams[stream].oss.setup_mutex);
1638 return NULL;
1639 }
1640
1641 static void snd_pcm_oss_init_substream(snd_pcm_substream_t *substream,
1642 snd_pcm_oss_setup_t *setup,
1643 int minor)
1644 {
1645 snd_pcm_runtime_t *runtime;
1646
1647 substream->oss.oss = 1;
1648 substream->oss.setup = setup;
1649 runtime = substream->runtime;
1650 runtime->oss.params = 1;
1651 runtime->oss.trigger = 1;
1652 runtime->oss.rate = 8000;
1653 switch (SNDRV_MINOR_OSS_DEVICE(minor)) {
1654 case SNDRV_MINOR_OSS_PCM_8:
1655 runtime->oss.format = AFMT_U8;
1656 break;
1657 case SNDRV_MINOR_OSS_PCM_16:
1658 runtime->oss.format = AFMT_S16_LE;
1659 break;
1660 default:
1661 runtime->oss.format = AFMT_MU_LAW;
1662 }
1663 runtime->oss.channels = 1;
1664 runtime->oss.fragshift = 0;
1665 runtime->oss.maxfrags = 0;
1666 runtime->oss.subdivision = 0;
1667 }
1668
1669 static void snd_pcm_oss_release_substream(snd_pcm_substream_t *substream)
1670 {
1671 snd_pcm_runtime_t *runtime;
1672 runtime = substream->runtime;
1673 vfree(runtime->oss.buffer);
1674 snd_pcm_oss_plugin_clear(substream);
1675 substream->oss.file = NULL;
1676 substream->oss.oss = 0;
1677 }
1678
1679 static int snd_pcm_oss_release_file(snd_pcm_oss_file_t *pcm_oss_file)
1680 {
1681 int cidx;
1682 snd_assert(pcm_oss_file != NULL, return -ENXIO);
1683 for (cidx = 0; cidx < 2; ++cidx) {
1684 snd_pcm_substream_t *substream = pcm_oss_file->streams[cidx];
1685 snd_pcm_runtime_t *runtime;
1686 if (substream == NULL)
1687 continue;
1688 runtime = substream->runtime;
1689
1690 snd_pcm_stream_lock_irq(substream);
1691 if (snd_pcm_running(substream))
1692 snd_pcm_stop(substream, SNDRV_PCM_STATE_SETUP);
1693 snd_pcm_stream_unlock_irq(substream);
1694 if (substream->open_flag) {
1695 if (substream->ops->hw_free != NULL)
1696 substream->ops->hw_free(substream);
1697 substream->ops->close(substream);
1698 substream->open_flag = 0;
1699 }
1700 substream->ffile = NULL;
1701 snd_pcm_oss_release_substream(substream);
1702 snd_pcm_release_substream(substream);
1703 }
1704 kfree(pcm_oss_file);
1705 return 0;
1706 }
1707
1708 static int snd_pcm_oss_open_file(struct file *file,
1709 snd_pcm_t *pcm,
1710 snd_pcm_oss_file_t **rpcm_oss_file,
1711 int minor,
1712 snd_pcm_oss_setup_t *psetup,
1713 snd_pcm_oss_setup_t *csetup)
1714 {
1715 int err = 0;
1716 snd_pcm_oss_file_t *pcm_oss_file;
1717 snd_pcm_substream_t *psubstream = NULL, *csubstream = NULL;
1718 unsigned int f_mode = file->f_mode;
1719
1720 snd_assert(rpcm_oss_file != NULL, return -EINVAL);
1721 *rpcm_oss_file = NULL;
1722
1723 pcm_oss_file = kcalloc(1, sizeof(*pcm_oss_file), GFP_KERNEL);
1724 if (pcm_oss_file == NULL)
1725 return -ENOMEM;
1726
1727 if ((f_mode & (FMODE_WRITE|FMODE_READ)) == (FMODE_WRITE|FMODE_READ) &&
1728 (pcm->info_flags & SNDRV_PCM_INFO_HALF_DUPLEX))
1729 f_mode = FMODE_WRITE;
1730 if ((f_mode & FMODE_WRITE) && !(psetup && psetup->disable)) {
1731 if ((err = snd_pcm_open_substream(pcm, SNDRV_PCM_STREAM_PLAYBACK,
1732 &psubstream)) < 0) {
1733 snd_pcm_oss_release_file(pcm_oss_file);
1734 return err;
1735 }
1736 pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK] = psubstream;
1737 }
1738 if ((f_mode & FMODE_READ) && !(csetup && csetup->disable)) {
1739 if ((err = snd_pcm_open_substream(pcm, SNDRV_PCM_STREAM_CAPTURE,
1740 &csubstream)) < 0) {
1741 if (!(f_mode & FMODE_WRITE) || err != -ENODEV) {
1742 snd_pcm_oss_release_file(pcm_oss_file);
1743 return err;
1744 } else {
1745 csubstream = NULL;
1746 }
1747 }
1748 pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE] = csubstream;
1749 }
1750
1751 if (psubstream == NULL && csubstream == NULL) {
1752 snd_pcm_oss_release_file(pcm_oss_file);
1753 return -EINVAL;
1754 }
1755 if (psubstream != NULL) {
1756 psubstream->oss.file = pcm_oss_file;
1757 err = snd_pcm_hw_constraints_init(psubstream);
1758 if (err < 0) {
1759 snd_printd("snd_pcm_hw_constraint_init failed\n");
1760 snd_pcm_oss_release_file(pcm_oss_file);
1761 return err;
1762 }
1763 if ((err = psubstream->ops->open(psubstream)) < 0) {
1764 snd_pcm_oss_release_file(pcm_oss_file);
1765 return err;
1766 }
1767 psubstream->open_flag = 1;
1768 err = snd_pcm_hw_constraints_complete(psubstream);
1769 if (err < 0) {
1770 snd_printd("snd_pcm_hw_constraint_complete failed\n");
1771 snd_pcm_oss_release_file(pcm_oss_file);
1772 return err;
1773 }
1774 psubstream->ffile = file;
1775 snd_pcm_oss_init_substream(psubstream, psetup, minor);
1776 }
1777 if (csubstream != NULL) {
1778 csubstream->oss.file = pcm_oss_file;
1779 err = snd_pcm_hw_constraints_init(csubstream);
1780 if (err < 0) {
1781 snd_printd("snd_pcm_hw_constraint_init failed\n");
1782 snd_pcm_oss_release_file(pcm_oss_file);
1783 return err;
1784 }
1785 if ((err = csubstream->ops->open(csubstream)) < 0) {
1786 snd_pcm_oss_release_file(pcm_oss_file);
1787 return err;
1788 }
1789 csubstream->open_flag = 1;
1790 err = snd_pcm_hw_constraints_complete(csubstream);
1791 if (err < 0) {
1792 snd_printd("snd_pcm_hw_constraint_complete failed\n");
1793 snd_pcm_oss_release_file(pcm_oss_file);
1794 return err;
1795 }
1796 csubstream->ffile = file;
1797 snd_pcm_oss_init_substream(csubstream, csetup, minor);
1798 }
1799
1800 file->private_data = pcm_oss_file;
1801 *rpcm_oss_file = pcm_oss_file;
1802 return 0;
1803 }
1804
1805
1806 static int snd_pcm_oss_open(struct inode *inode, struct file *file)
1807 {
1808 int minor = iminor(inode);
1809 int cardnum = SNDRV_MINOR_OSS_CARD(minor);
1810 int device;
1811 int err;
1812 char task_name[32];
1813 snd_pcm_t *pcm;
1814 snd_pcm_oss_file_t *pcm_oss_file;
1815 snd_pcm_oss_setup_t *psetup = NULL, *csetup = NULL;
1816 int nonblock;
1817 wait_queue_t wait;
1818
1819 snd_assert(cardnum >= 0 && cardnum < SNDRV_CARDS, return -ENXIO);
1820 device = SNDRV_MINOR_OSS_DEVICE(minor) == SNDRV_MINOR_OSS_PCM1 ?
1821 adsp_map[cardnum] : dsp_map[cardnum];
1822
1823 pcm = snd_pcm_devices[(cardnum * SNDRV_PCM_DEVICES) + device];
1824 if (pcm == NULL) {
1825 err = -ENODEV;
1826 goto __error1;
1827 }
1828 err = snd_card_file_add(pcm->card, file);
1829 if (err < 0)
1830 goto __error1;
1831 if (!try_module_get(pcm->card->module)) {
1832 err = -EFAULT;
1833 goto __error2;
1834 }
1835 if (snd_task_name(current, task_name, sizeof(task_name)) < 0) {
1836 err = -EFAULT;
1837 goto __error;
1838 }
1839 if (file->f_mode & FMODE_WRITE)
1840 psetup = snd_pcm_oss_look_for_setup(pcm, SNDRV_PCM_STREAM_PLAYBACK, task_name);
1841 if (file->f_mode & FMODE_READ)
1842 csetup = snd_pcm_oss_look_for_setup(pcm, SNDRV_PCM_STREAM_CAPTURE, task_name);
1843
1844 nonblock = !!(file->f_flags & O_NONBLOCK);
1845 if (psetup && !psetup->disable) {
1846 if (psetup->nonblock)
1847 nonblock = 1;
1848 else if (psetup->block)
1849 nonblock = 0;
1850 } else if (csetup && !csetup->disable) {
1851 if (csetup->nonblock)
1852 nonblock = 1;
1853 else if (csetup->block)
1854 nonblock = 0;
1855 }
1856 if (!nonblock)
1857 nonblock = nonblock_open;
1858
1859 init_waitqueue_entry(&wait, current);
1860 add_wait_queue(&pcm->open_wait, &wait);
1861 down(&pcm->open_mutex);
1862 while (1) {
1863 err = snd_pcm_oss_open_file(file, pcm, &pcm_oss_file,
1864 minor, psetup, csetup);
1865 if (err >= 0)
1866 break;
1867 if (err == -EAGAIN) {
1868 if (nonblock) {
1869 err = -EBUSY;
1870 break;
1871 }
1872 } else
1873 break;
1874 set_current_state(TASK_INTERRUPTIBLE);
1875 up(&pcm->open_mutex);
1876 schedule();
1877 down(&pcm->open_mutex);
1878 if (signal_pending(current)) {
1879 err = -ERESTARTSYS;
1880 break;
1881 }
1882 }
1883 remove_wait_queue(&pcm->open_wait, &wait);
1884 up(&pcm->open_mutex);
1885 if (err < 0)
1886 goto __error;
1887 return err;
1888
1889 __error:
1890 module_put(pcm->card->module);
1891 __error2:
1892 snd_card_file_remove(pcm->card, file);
1893 __error1:
1894 return err;
1895 }
1896
1897 static int snd_pcm_oss_release(struct inode *inode, struct file *file)
1898 {
1899 snd_pcm_t *pcm;
1900 snd_pcm_substream_t *substream;
1901 snd_pcm_oss_file_t *pcm_oss_file;
1902
1903 pcm_oss_file = file->private_data;
1904 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
1905 if (substream == NULL)
1906 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
1907 snd_assert(substream != NULL, return -ENXIO);
1908 pcm = substream->pcm;
1909 snd_pcm_oss_sync(pcm_oss_file);
1910 down(&pcm->open_mutex);
1911 snd_pcm_oss_release_file(pcm_oss_file);
1912 up(&pcm->open_mutex);
1913 wake_up(&pcm->open_wait);
1914 module_put(pcm->card->module);
1915 snd_card_file_remove(pcm->card, file);
1916 return 0;
1917 }
1918
1919 static long snd_pcm_oss_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
1920 {
1921 snd_pcm_oss_file_t *pcm_oss_file;
1922 int __user *p = (int __user *)arg;
1923 int res;
1924
1925 pcm_oss_file = file->private_data;
1926 if (cmd == OSS_GETVERSION)
1927 return put_user(SNDRV_OSS_VERSION, p);
1928 if (cmd == OSS_ALSAEMULVER)
1929 return put_user(1, p);
1930 #if defined(CONFIG_SND_MIXER_OSS) || (defined(MODULE) && defined(CONFIG_SND_MIXER_OSS_MODULE))
1931 if (((cmd >> 8) & 0xff) == 'M') { /* mixer ioctl - for OSS compatibility */
1932 snd_pcm_substream_t *substream;
1933 int idx;
1934 for (idx = 0; idx < 2; ++idx) {
1935 substream = pcm_oss_file->streams[idx];
1936 if (substream != NULL)
1937 break;
1938 }
1939 snd_assert(substream != NULL, return -ENXIO);
1940 return snd_mixer_oss_ioctl_card(substream->pcm->card, cmd, arg);
1941 }
1942 #endif
1943 if (((cmd >> 8) & 0xff) != 'P')
1944 return -EINVAL;
1945 #ifdef OSS_DEBUG
1946 printk("pcm_oss: ioctl = 0x%x\n", cmd);
1947 #endif
1948 switch (cmd) {
1949 case SNDCTL_DSP_RESET:
1950 return snd_pcm_oss_reset(pcm_oss_file);
1951 case SNDCTL_DSP_SYNC:
1952 return snd_pcm_oss_sync(pcm_oss_file);
1953 case SNDCTL_DSP_SPEED:
1954 if (get_user(res, p))
1955 return -EFAULT;
1956 if ((res = snd_pcm_oss_set_rate(pcm_oss_file, res))<0)
1957 return res;
1958 return put_user(res, p);
1959 case SOUND_PCM_READ_RATE:
1960 res = snd_pcm_oss_get_rate(pcm_oss_file);
1961 if (res < 0)
1962 return res;
1963 return put_user(res, p);
1964 case SNDCTL_DSP_STEREO:
1965 if (get_user(res, p))
1966 return -EFAULT;
1967 res = res > 0 ? 2 : 1;
1968 if ((res = snd_pcm_oss_set_channels(pcm_oss_file, res)) < 0)
1969 return res;
1970 return put_user(--res, p);
1971 case SNDCTL_DSP_GETBLKSIZE:
1972 res = snd_pcm_oss_get_block_size(pcm_oss_file);
1973 if (res < 0)
1974 return res;
1975 return put_user(res, p);
1976 case SNDCTL_DSP_SETFMT:
1977 if (get_user(res, p))
1978 return -EFAULT;
1979 res = snd_pcm_oss_set_format(pcm_oss_file, res);
1980 if (res < 0)
1981 return res;
1982 return put_user(res, p);
1983 case SOUND_PCM_READ_BITS:
1984 res = snd_pcm_oss_get_format(pcm_oss_file);
1985 if (res < 0)
1986 return res;
1987 return put_user(res, p);
1988 case SNDCTL_DSP_CHANNELS:
1989 if (get_user(res, p))
1990 return -EFAULT;
1991 res = snd_pcm_oss_set_channels(pcm_oss_file, res);
1992 if (res < 0)
1993 return res;
1994 return put_user(res, p);
1995 case SOUND_PCM_READ_CHANNELS:
1996 res = snd_pcm_oss_get_channels(pcm_oss_file);
1997 if (res < 0)
1998 return res;
1999 return put_user(res, p);
2000 case SOUND_PCM_WRITE_FILTER:
2001 case SOUND_PCM_READ_FILTER:
2002 return -EIO;
2003 case SNDCTL_DSP_POST:
2004 return snd_pcm_oss_post(pcm_oss_file);
2005 case SNDCTL_DSP_SUBDIVIDE:
2006 if (get_user(res, p))
2007 return -EFAULT;
2008 res = snd_pcm_oss_set_subdivide(pcm_oss_file, res);
2009 if (res < 0)
2010 return res;
2011 return put_user(res, p);
2012 case SNDCTL_DSP_SETFRAGMENT:
2013 if (get_user(res, p))
2014 return -EFAULT;
2015 return snd_pcm_oss_set_fragment(pcm_oss_file, res);
2016 case SNDCTL_DSP_GETFMTS:
2017 res = snd_pcm_oss_get_formats(pcm_oss_file);
2018 if (res < 0)
2019 return res;
2020 return put_user(res, p);
2021 case SNDCTL_DSP_GETOSPACE:
2022 case SNDCTL_DSP_GETISPACE:
2023 return snd_pcm_oss_get_space(pcm_oss_file,
2024 cmd == SNDCTL_DSP_GETISPACE ?
2025 SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK,
2026 (struct audio_buf_info __user *) arg);
2027 case SNDCTL_DSP_NONBLOCK:
2028 return snd_pcm_oss_nonblock(file);
2029 case SNDCTL_DSP_GETCAPS:
2030 res = snd_pcm_oss_get_caps(pcm_oss_file);
2031 if (res < 0)
2032 return res;
2033 return put_user(res, p);
2034 case SNDCTL_DSP_GETTRIGGER:
2035 res = snd_pcm_oss_get_trigger(pcm_oss_file);
2036 if (res < 0)
2037 return res;
2038 return put_user(res, p);
2039 case SNDCTL_DSP_SETTRIGGER:
2040 if (get_user(res, p))
2041 return -EFAULT;
2042 return snd_pcm_oss_set_trigger(pcm_oss_file, res);
2043 case SNDCTL_DSP_GETIPTR:
2044 case SNDCTL_DSP_GETOPTR:
2045 return snd_pcm_oss_get_ptr(pcm_oss_file,
2046 cmd == SNDCTL_DSP_GETIPTR ?
2047 SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK,
2048 (struct count_info __user *) arg);
2049 case SNDCTL_DSP_MAPINBUF:
2050 case SNDCTL_DSP_MAPOUTBUF:
2051 return snd_pcm_oss_get_mapbuf(pcm_oss_file,
2052 cmd == SNDCTL_DSP_MAPINBUF ?
2053 SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK,
2054 (struct buffmem_desc __user *) arg);
2055 case SNDCTL_DSP_SETSYNCRO:
2056 /* stop DMA now.. */
2057 return 0;
2058 case SNDCTL_DSP_SETDUPLEX:
2059 if (snd_pcm_oss_get_caps(pcm_oss_file) & DSP_CAP_DUPLEX)
2060 return 0;
2061 return -EIO;
2062 case SNDCTL_DSP_GETODELAY:
2063 res = snd_pcm_oss_get_odelay(pcm_oss_file);
2064 if (res < 0) {
2065 /* it's for sure, some broken apps don't check for error codes */
2066 put_user(0, p);
2067 return res;
2068 }
2069 return put_user(res, p);
2070 case SNDCTL_DSP_PROFILE:
2071 return 0; /* silently ignore */
2072 default:
2073 snd_printd("pcm_oss: unknown command = 0x%x\n", cmd);
2074 }
2075 return -EINVAL;
2076 }
2077
2078 #ifdef CONFIG_COMPAT
2079 /* all compatible */
2080 #define snd_pcm_oss_ioctl_compat snd_pcm_oss_ioctl
2081 #else
2082 #define snd_pcm_oss_ioctl_compat NULL
2083 #endif
2084
2085 static ssize_t snd_pcm_oss_read(struct file *file, char __user *buf, size_t count, loff_t *offset)
2086 {
2087 snd_pcm_oss_file_t *pcm_oss_file;
2088 snd_pcm_substream_t *substream;
2089
2090 pcm_oss_file = file->private_data;
2091 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
2092 if (substream == NULL)
2093 return -ENXIO;
2094 #ifndef OSS_DEBUG
2095 return snd_pcm_oss_read1(substream, buf, count);
2096 #else
2097 {
2098 ssize_t res = snd_pcm_oss_read1(substream, buf, count);
2099 printk("pcm_oss: read %li bytes (returned %li bytes)\n", (long)count, (long)res);
2100 return res;
2101 }
2102 #endif
2103 }
2104
2105 static ssize_t snd_pcm_oss_write(struct file *file, const char __user *buf, size_t count, loff_t *offset)
2106 {
2107 snd_pcm_oss_file_t *pcm_oss_file;
2108 snd_pcm_substream_t *substream;
2109 long result;
2110
2111 pcm_oss_file = file->private_data;
2112 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
2113 if (substream == NULL)
2114 return -ENXIO;
2115 up(&file->f_dentry->d_inode->i_sem);
2116 result = snd_pcm_oss_write1(substream, buf, count);
2117 down(&file->f_dentry->d_inode->i_sem);
2118 #ifdef OSS_DEBUG
2119 printk("pcm_oss: write %li bytes (wrote %li bytes)\n", (long)count, (long)result);
2120 #endif
2121 return result;
2122 }
2123
2124 static int snd_pcm_oss_playback_ready(snd_pcm_substream_t *substream)
2125 {
2126 snd_pcm_runtime_t *runtime = substream->runtime;
2127 if (atomic_read(&runtime->mmap_count))
2128 return runtime->oss.prev_hw_ptr_interrupt != runtime->hw_ptr_interrupt;
2129 else
2130 return snd_pcm_playback_avail(runtime) >= runtime->oss.period_frames;
2131 }
2132
2133 static int snd_pcm_oss_capture_ready(snd_pcm_substream_t *substream)
2134 {
2135 snd_pcm_runtime_t *runtime = substream->runtime;
2136 if (atomic_read(&runtime->mmap_count))
2137 return runtime->oss.prev_hw_ptr_interrupt != runtime->hw_ptr_interrupt;
2138 else
2139 return snd_pcm_capture_avail(runtime) >= runtime->oss.period_frames;
2140 }
2141
2142 static unsigned int snd_pcm_oss_poll(struct file *file, poll_table * wait)
2143 {
2144 snd_pcm_oss_file_t *pcm_oss_file;
2145 unsigned int mask;
2146 snd_pcm_substream_t *psubstream = NULL, *csubstream = NULL;
2147
2148 pcm_oss_file = file->private_data;
2149
2150 psubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
2151 csubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
2152
2153 mask = 0;
2154 if (psubstream != NULL) {
2155 snd_pcm_runtime_t *runtime = psubstream->runtime;
2156 poll_wait(file, &runtime->sleep, wait);
2157 snd_pcm_stream_lock_irq(psubstream);
2158 if (runtime->status->state != SNDRV_PCM_STATE_DRAINING &&
2159 (runtime->status->state != SNDRV_PCM_STATE_RUNNING ||
2160 snd_pcm_oss_playback_ready(psubstream)))
2161 mask |= POLLOUT | POLLWRNORM;
2162 snd_pcm_stream_unlock_irq(psubstream);
2163 }
2164 if (csubstream != NULL) {
2165 snd_pcm_runtime_t *runtime = csubstream->runtime;
2166 enum sndrv_pcm_state ostate;
2167 poll_wait(file, &runtime->sleep, wait);
2168 snd_pcm_stream_lock_irq(csubstream);
2169 if ((ostate = runtime->status->state) != SNDRV_PCM_STATE_RUNNING ||
2170 snd_pcm_oss_capture_ready(csubstream))
2171 mask |= POLLIN | POLLRDNORM;
2172 snd_pcm_stream_unlock_irq(csubstream);
2173 if (ostate != SNDRV_PCM_STATE_RUNNING && runtime->oss.trigger) {
2174 snd_pcm_oss_file_t ofile;
2175 memset(&ofile, 0, sizeof(ofile));
2176 ofile.streams[SNDRV_PCM_STREAM_CAPTURE] = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
2177 runtime->oss.trigger = 0;
2178 snd_pcm_oss_set_trigger(&ofile, PCM_ENABLE_INPUT);
2179 }
2180 }
2181
2182 return mask;
2183 }
2184
2185 static int snd_pcm_oss_mmap(struct file *file, struct vm_area_struct *area)
2186 {
2187 snd_pcm_oss_file_t *pcm_oss_file;
2188 snd_pcm_substream_t *substream = NULL;
2189 snd_pcm_runtime_t *runtime;
2190 int err;
2191
2192 #ifdef OSS_DEBUG
2193 printk("pcm_oss: mmap begin\n");
2194 #endif
2195 pcm_oss_file = file->private_data;
2196 switch ((area->vm_flags & (VM_READ | VM_WRITE))) {
2197 case VM_READ | VM_WRITE:
2198 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
2199 if (substream)
2200 break;
2201 /* Fall through */
2202 case VM_READ:
2203 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
2204 break;
2205 case VM_WRITE:
2206 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
2207 break;
2208 default:
2209 return -EINVAL;
2210 }
2211 /* set VM_READ access as well to fix memset() routines that do
2212 reads before writes (to improve performance) */
2213 area->vm_flags |= VM_READ;
2214 if (substream == NULL)
2215 return -ENXIO;
2216 runtime = substream->runtime;
2217 if (!(runtime->info & SNDRV_PCM_INFO_MMAP_VALID))
2218 return -EIO;
2219 if (runtime->info & SNDRV_PCM_INFO_INTERLEAVED)
2220 runtime->access = SNDRV_PCM_ACCESS_MMAP_INTERLEAVED;
2221 else
2222 return -EIO;
2223
2224 if (runtime->oss.params) {
2225 if ((err = snd_pcm_oss_change_params(substream)) < 0)
2226 return err;
2227 }
2228 if (runtime->oss.plugin_first != NULL)
2229 return -EIO;
2230
2231 if (area->vm_pgoff != 0)
2232 return -EINVAL;
2233
2234 err = snd_pcm_mmap_data(substream, file, area);
2235 if (err < 0)
2236 return err;
2237 runtime->oss.mmap_bytes = area->vm_end - area->vm_start;
2238 runtime->silence_threshold = 0;
2239 runtime->silence_size = 0;
2240 #ifdef OSS_DEBUG
2241 printk("pcm_oss: mmap ok, bytes = 0x%x\n", runtime->oss.mmap_bytes);
2242 #endif
2243 /* In mmap mode we never stop */
2244 runtime->stop_threshold = runtime->boundary;
2245
2246 return 0;
2247 }
2248
2249 /*
2250 * /proc interface
2251 */
2252
2253 static void snd_pcm_oss_proc_read(snd_info_entry_t *entry,
2254 snd_info_buffer_t * buffer)
2255 {
2256 snd_pcm_str_t *pstr = (snd_pcm_str_t *)entry->private_data;
2257 snd_pcm_oss_setup_t *setup = pstr->oss.setup_list;
2258 down(&pstr->oss.setup_mutex);
2259 while (setup) {
2260 snd_iprintf(buffer, "%s %u %u%s%s%s%s%s%s\n",
2261 setup->task_name,
2262 setup->periods,
2263 setup->period_size,
2264 setup->disable ? " disable" : "",
2265 setup->direct ? " direct" : "",
2266 setup->block ? " block" : "",
2267 setup->nonblock ? " non-block" : "",
2268 setup->partialfrag ? " partial-frag" : "",
2269 setup->nosilence ? " no-silence" : "");
2270 setup = setup->next;
2271 }
2272 up(&pstr->oss.setup_mutex);
2273 }
2274
2275 static void snd_pcm_oss_proc_free_setup_list(snd_pcm_str_t * pstr)
2276 {
2277 unsigned int idx;
2278 snd_pcm_substream_t *substream;
2279 snd_pcm_oss_setup_t *setup, *setupn;
2280
2281 for (idx = 0, substream = pstr->substream;
2282 idx < pstr->substream_count; idx++, substream = substream->next)
2283 substream->oss.setup = NULL;
2284 for (setup = pstr->oss.setup_list, pstr->oss.setup_list = NULL;
2285 setup; setup = setupn) {
2286 setupn = setup->next;
2287 kfree(setup->task_name);
2288 kfree(setup);
2289 }
2290 pstr->oss.setup_list = NULL;
2291 }
2292
2293 static void snd_pcm_oss_proc_write(snd_info_entry_t *entry,
2294 snd_info_buffer_t * buffer)
2295 {
2296 snd_pcm_str_t *pstr = (snd_pcm_str_t *)entry->private_data;
2297 char line[128], str[32], task_name[32], *ptr;
2298 int idx1;
2299 snd_pcm_oss_setup_t *setup, *setup1, template;
2300
2301 while (!snd_info_get_line(buffer, line, sizeof(line))) {
2302 down(&pstr->oss.setup_mutex);
2303 memset(&template, 0, sizeof(template));
2304 ptr = snd_info_get_str(task_name, line, sizeof(task_name));
2305 if (!strcmp(task_name, "clear") || !strcmp(task_name, "erase")) {
2306 snd_pcm_oss_proc_free_setup_list(pstr);
2307 up(&pstr->oss.setup_mutex);
2308 continue;
2309 }
2310 for (setup = pstr->oss.setup_list; setup; setup = setup->next) {
2311 if (!strcmp(setup->task_name, task_name)) {
2312 template = *setup;
2313 break;
2314 }
2315 }
2316 ptr = snd_info_get_str(str, ptr, sizeof(str));
2317 template.periods = simple_strtoul(str, NULL, 10);
2318 ptr = snd_info_get_str(str, ptr, sizeof(str));
2319 template.period_size = simple_strtoul(str, NULL, 10);
2320 for (idx1 = 31; idx1 >= 0; idx1--)
2321 if (template.period_size & (1 << idx1))
2322 break;
2323 for (idx1--; idx1 >= 0; idx1--)
2324 template.period_size &= ~(1 << idx1);
2325 do {
2326 ptr = snd_info_get_str(str, ptr, sizeof(str));
2327 if (!strcmp(str, "disable")) {
2328 template.disable = 1;
2329 } else if (!strcmp(str, "direct")) {
2330 template.direct = 1;
2331 } else if (!strcmp(str, "block")) {
2332 template.block = 1;
2333 } else if (!strcmp(str, "non-block")) {
2334 template.nonblock = 1;
2335 } else if (!strcmp(str, "partial-frag")) {
2336 template.partialfrag = 1;
2337 } else if (!strcmp(str, "no-silence")) {
2338 template.nosilence = 1;
2339 }
2340 } while (*str);
2341 if (setup == NULL) {
2342 setup = (snd_pcm_oss_setup_t *) kmalloc(sizeof(snd_pcm_oss_setup_t), GFP_KERNEL);
2343 if (setup) {
2344 if (pstr->oss.setup_list == NULL) {
2345 pstr->oss.setup_list = setup;
2346 } else {
2347 for (setup1 = pstr->oss.setup_list; setup1->next; setup1 = setup1->next);
2348 setup1->next = setup;
2349 }
2350 template.task_name = snd_kmalloc_strdup(task_name, GFP_KERNEL);
2351 } else {
2352 buffer->error = -ENOMEM;
2353 }
2354 }
2355 if (setup)
2356 *setup = template;
2357 up(&pstr->oss.setup_mutex);
2358 }
2359 }
2360
2361 static void snd_pcm_oss_proc_init(snd_pcm_t *pcm)
2362 {
2363 int stream;
2364 for (stream = 0; stream < 2; ++stream) {
2365 snd_info_entry_t *entry;
2366 snd_pcm_str_t *pstr = &pcm->streams[stream];
2367 if (pstr->substream_count == 0)
2368 continue;
2369 if ((entry = snd_info_create_card_entry(pcm->card, "oss", pstr->proc_root)) != NULL) {
2370 entry->content = SNDRV_INFO_CONTENT_TEXT;
2371 entry->mode = S_IFREG | S_IRUGO | S_IWUSR;
2372 entry->c.text.read_size = 8192;
2373 entry->c.text.read = snd_pcm_oss_proc_read;
2374 entry->c.text.write_size = 8192;
2375 entry->c.text.write = snd_pcm_oss_proc_write;
2376 entry->private_data = pstr;
2377 if (snd_info_register(entry) < 0) {
2378 snd_info_free_entry(entry);
2379 entry = NULL;
2380 }
2381 }
2382 pstr->oss.proc_entry = entry;
2383 }
2384 }
2385
2386 static void snd_pcm_oss_proc_done(snd_pcm_t *pcm)
2387 {
2388 int stream;
2389 for (stream = 0; stream < 2; ++stream) {
2390 snd_pcm_str_t *pstr = &pcm->streams[stream];
2391 if (pstr->oss.proc_entry) {
2392 snd_info_unregister(pstr->oss.proc_entry);
2393 pstr->oss.proc_entry = NULL;
2394 snd_pcm_oss_proc_free_setup_list(pstr);
2395 }
2396 }
2397 }
2398
2399 /*
2400 * ENTRY functions
2401 */
2402
2403 static struct file_operations snd_pcm_oss_f_reg =
2404 {
2405 .owner = THIS_MODULE,
2406 .read = snd_pcm_oss_read,
2407 .write = snd_pcm_oss_write,
2408 .open = snd_pcm_oss_open,
2409 .release = snd_pcm_oss_release,
2410 .poll = snd_pcm_oss_poll,
2411 .unlocked_ioctl = snd_pcm_oss_ioctl,
2412 .compat_ioctl = snd_pcm_oss_ioctl_compat,
2413 .mmap = snd_pcm_oss_mmap,
2414 };
2415
2416 static snd_minor_t snd_pcm_oss_reg =
2417 {
2418 .comment = "digital audio",
2419 .f_ops = &snd_pcm_oss_f_reg,
2420 };
2421
2422 static void register_oss_dsp(snd_pcm_t *pcm, int index)
2423 {
2424 char name[128];
2425 sprintf(name, "dsp%i%i", pcm->card->number, pcm->device);
2426 if (snd_register_oss_device(SNDRV_OSS_DEVICE_TYPE_PCM,
2427 pcm->card, index, &snd_pcm_oss_reg,
2428 name) < 0) {
2429 snd_printk("unable to register OSS PCM device %i:%i\n", pcm->card->number, pcm->device);
2430 }
2431 }
2432
2433 static int snd_pcm_oss_register_minor(snd_pcm_t * pcm)
2434 {
2435 pcm->oss.reg = 0;
2436 if (dsp_map[pcm->card->number] == (int)pcm->device) {
2437 char name[128];
2438 int duplex;
2439 register_oss_dsp(pcm, 0);
2440 duplex = (pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream_count > 0 &&
2441 pcm->streams[SNDRV_PCM_STREAM_CAPTURE].substream_count &&
2442 !(pcm->info_flags & SNDRV_PCM_INFO_HALF_DUPLEX));
2443 sprintf(name, "%s%s", pcm->name, duplex ? " (DUPLEX)" : "");
2444 #ifdef SNDRV_OSS_INFO_DEV_AUDIO
2445 snd_oss_info_register(SNDRV_OSS_INFO_DEV_AUDIO,
2446 pcm->card->number,
2447 name);
2448 #endif
2449 pcm->oss.reg++;
2450 pcm->oss.reg_mask |= 1;
2451 }
2452 if (adsp_map[pcm->card->number] == (int)pcm->device) {
2453 register_oss_dsp(pcm, 1);
2454 pcm->oss.reg++;
2455 pcm->oss.reg_mask |= 2;
2456 }
2457
2458 if (pcm->oss.reg)
2459 snd_pcm_oss_proc_init(pcm);
2460
2461 return 0;
2462 }
2463
2464 static int snd_pcm_oss_disconnect_minor(snd_pcm_t * pcm)
2465 {
2466 if (pcm->oss.reg) {
2467 if (pcm->oss.reg_mask & 1) {
2468 pcm->oss.reg_mask &= ~1;
2469 snd_unregister_oss_device(SNDRV_OSS_DEVICE_TYPE_PCM,
2470 pcm->card, 0);
2471 }
2472 if (pcm->oss.reg_mask & 2) {
2473 pcm->oss.reg_mask &= ~2;
2474 snd_unregister_oss_device(SNDRV_OSS_DEVICE_TYPE_PCM,
2475 pcm->card, 1);
2476 }
2477 }
2478 return 0;
2479 }
2480
2481 static int snd_pcm_oss_unregister_minor(snd_pcm_t * pcm)
2482 {
2483 snd_pcm_oss_disconnect_minor(pcm);
2484 if (pcm->oss.reg) {
2485 if (dsp_map[pcm->card->number] == (int)pcm->device) {
2486 #ifdef SNDRV_OSS_INFO_DEV_AUDIO
2487 snd_oss_info_unregister(SNDRV_OSS_INFO_DEV_AUDIO, pcm->card->number);
2488 #endif
2489 }
2490 pcm->oss.reg = 0;
2491 snd_pcm_oss_proc_done(pcm);
2492 }
2493 return 0;
2494 }
2495
2496 static snd_pcm_notify_t snd_pcm_oss_notify =
2497 {
2498 .n_register = snd_pcm_oss_register_minor,
2499 .n_disconnect = snd_pcm_oss_disconnect_minor,
2500 .n_unregister = snd_pcm_oss_unregister_minor,
2501 };
2502
2503 static int __init alsa_pcm_oss_init(void)
2504 {
2505 int i;
2506 int err;
2507
2508 /* check device map table */
2509 for (i = 0; i < SNDRV_CARDS; i++) {
2510 if (dsp_map[i] < 0 || dsp_map[i] >= SNDRV_PCM_DEVICES) {
2511 snd_printk("invalid dsp_map[%d] = %d\n", i, dsp_map[i]);
2512 dsp_map[i] = 0;
2513 }
2514 if (adsp_map[i] < 0 || adsp_map[i] >= SNDRV_PCM_DEVICES) {
2515 snd_printk("invalid adsp_map[%d] = %d\n", i, adsp_map[i]);
2516 adsp_map[i] = 1;
2517 }
2518 }
2519 if ((err = snd_pcm_notify(&snd_pcm_oss_notify, 0)) < 0)
2520 return err;
2521 return 0;
2522 }
2523
2524 static void __exit alsa_pcm_oss_exit(void)
2525 {
2526 snd_pcm_notify(&snd_pcm_oss_notify, 1);
2527 }
2528
2529 module_init(alsa_pcm_oss_init)
2530 module_exit(alsa_pcm_oss_exit)
Linux with added FPC-III support