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[PATCH] fix for prune_icache()/forced final iput() races
[deliverable/linux.git] / sound / core / oss / pcm_oss.c
CommitLineData
1da177e4
LT		 1/*
2 * Digital Audio (PCM) abstract layer / OSS compatible
3 * Copyright (c) by Jaroslav Kysela <perex@suse.cz>
4 *
5 *
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2 of the License, or
9 * (at your option) any later version.
10 *
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
15 *
16 * You should have received a copy of the GNU General Public License
17 * along with this program; if not, write to the Free Software
18 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
19 *
20 */
21
22#if 0
23#define PLUGIN_DEBUG
24#endif
25#if 0
26#define OSS_DEBUG
27#endif
28
29#include <sound/driver.h>
30#include <linux/init.h>
31#include <linux/smp_lock.h>
32#include <linux/slab.h>
33#include <linux/time.h>
34#include <linux/vmalloc.h>
35#include <linux/moduleparam.h>
36#include <sound/core.h>
37#include <sound/minors.h>
38#include <sound/pcm.h>
39#include <sound/pcm_params.h>
40#include "pcm_plugin.h"
41#include <sound/info.h>
42#include <linux/soundcard.h>
43#include <sound/initval.h>
44
45#define OSS_ALSAEMULVER _SIOR ('M', 249, int)
46
47static int dsp_map[SNDRV_CARDS] = {[0 ... (SNDRV_CARDS-1)] = 0};
48static int adsp_map[SNDRV_CARDS] = {[0 ... (SNDRV_CARDS-1)] = 1};
49static int nonblock_open = 1;
50
51MODULE_AUTHOR("Jaroslav Kysela <perex@suse.cz>, Abramo Bagnara <abramo@alsa-project.org>");
52MODULE_DESCRIPTION("PCM OSS emulation for ALSA.");
53MODULE_LICENSE("GPL");
54module_param_array(dsp_map, int, NULL, 0444);
55MODULE_PARM_DESC(dsp_map, "PCM device number assigned to 1st OSS device.");
56module_param_array(adsp_map, int, NULL, 0444);
57MODULE_PARM_DESC(adsp_map, "PCM device number assigned to 2nd OSS device.");
58module_param(nonblock_open, bool, 0644);
59MODULE_PARM_DESC(nonblock_open, "Don't block opening busy PCM devices.");
60MODULE_ALIAS_SNDRV_MINOR(SNDRV_MINOR_OSS_PCM);
61MODULE_ALIAS_SNDRV_MINOR(SNDRV_MINOR_OSS_PCM1);
62
63extern int snd_mixer_oss_ioctl_card(snd_card_t *card, unsigned int cmd, unsigned long arg);
64static int snd_pcm_oss_get_rate(snd_pcm_oss_file_t *pcm_oss_file);
65static int snd_pcm_oss_get_channels(snd_pcm_oss_file_t *pcm_oss_file);
66static int snd_pcm_oss_get_format(snd_pcm_oss_file_t *pcm_oss_file);
67
68static inline mm_segment_t snd_enter_user(void)
69{
70 mm_segment_t fs = get_fs();
71 set_fs(get_ds());
72 return fs;
73}
74
75static inline void snd_leave_user(mm_segment_t fs)
76{
77 set_fs(fs);
78}
79
80static int snd_pcm_oss_plugin_clear(snd_pcm_substream_t *substream)
81{
82 snd_pcm_runtime_t *runtime = substream->runtime;
83 snd_pcm_plugin_t *plugin, *next;
84
85 plugin = runtime->oss.plugin_first;
86 while (plugin) {
87 next = plugin->next;
88 snd_pcm_plugin_free(plugin);
89 plugin = next;
90 }
91 runtime->oss.plugin_first = runtime->oss.plugin_last = NULL;
92 return 0;
93}
94
95static int snd_pcm_plugin_insert(snd_pcm_plugin_t *plugin)
96{
97 snd_pcm_runtime_t *runtime = plugin->plug->runtime;
98 plugin->next = runtime->oss.plugin_first;
99 plugin->prev = NULL;
100 if (runtime->oss.plugin_first) {
101 runtime->oss.plugin_first->prev = plugin;
102 runtime->oss.plugin_first = plugin;
103 } else {
104 runtime->oss.plugin_last =
105 runtime->oss.plugin_first = plugin;
106 }
107 return 0;
108}
109
110int snd_pcm_plugin_append(snd_pcm_plugin_t *plugin)
111{
112 snd_pcm_runtime_t *runtime = plugin->plug->runtime;
113 plugin->next = NULL;
114 plugin->prev = runtime->oss.plugin_last;
115 if (runtime->oss.plugin_last) {
116 runtime->oss.plugin_last->next = plugin;
117 runtime->oss.plugin_last = plugin;
118 } else {
119 runtime->oss.plugin_last =
120 runtime->oss.plugin_first = plugin;
121 }
122 return 0;
123}
124
125static long snd_pcm_oss_bytes(snd_pcm_substream_t *substream, long frames)
126{
127 snd_pcm_runtime_t *runtime = substream->runtime;
af081613 128 long buffer_size = snd_pcm_lib_buffer_bytes(substream);
bfc5bddb 129 long bytes = frames_to_bytes(runtime, frames);
1da177e4 130 if (buffer_size == runtime->oss.buffer_bytes)
bfc5bddb 131 return bytes;
cdc5c53f
TI		 132#if BITS_PER_LONG >= 64
133 return runtime->oss.buffer_bytes * bytes / buffer_size;
134#else
135 {
136 u64 bsize = (u64)runtime->oss.buffer_bytes * (u64)bytes;
137 u32 rem;
138 div64_32(&bsize, buffer_size, &rem);
139 return (long)bsize;
140 }
141#endif
1da177e4
LT		 142}
143
144static long snd_pcm_alsa_frames(snd_pcm_substream_t *substream, long bytes)
145{
146 snd_pcm_runtime_t *runtime = substream->runtime;
af081613 147 long buffer_size = snd_pcm_lib_buffer_bytes(substream);
1da177e4
LT		 148 if (buffer_size == runtime->oss.buffer_bytes)
149 return bytes_to_frames(runtime, bytes);
150 return bytes_to_frames(runtime, (buffer_size * bytes) / runtime->oss.buffer_bytes);
151}
152
153static int snd_pcm_oss_format_from(int format)
154{
155 switch (format) {
156 case AFMT_MU_LAW: return SNDRV_PCM_FORMAT_MU_LAW;
157 case AFMT_A_LAW: return SNDRV_PCM_FORMAT_A_LAW;
158 case AFMT_IMA_ADPCM: return SNDRV_PCM_FORMAT_IMA_ADPCM;
159 case AFMT_U8: return SNDRV_PCM_FORMAT_U8;
160 case AFMT_S16_LE: return SNDRV_PCM_FORMAT_S16_LE;
161 case AFMT_S16_BE: return SNDRV_PCM_FORMAT_S16_BE;
162 case AFMT_S8: return SNDRV_PCM_FORMAT_S8;
163 case AFMT_U16_LE: return SNDRV_PCM_FORMAT_U16_LE;
164 case AFMT_U16_BE: return SNDRV_PCM_FORMAT_U16_BE;
165 case AFMT_MPEG: return SNDRV_PCM_FORMAT_MPEG;
166 default: return SNDRV_PCM_FORMAT_U8;
167 }
168}
169
170static int snd_pcm_oss_format_to(int format)
171{
172 switch (format) {
173 case SNDRV_PCM_FORMAT_MU_LAW: return AFMT_MU_LAW;
174 case SNDRV_PCM_FORMAT_A_LAW: return AFMT_A_LAW;
175 case SNDRV_PCM_FORMAT_IMA_ADPCM: return AFMT_IMA_ADPCM;
176 case SNDRV_PCM_FORMAT_U8: return AFMT_U8;
177 case SNDRV_PCM_FORMAT_S16_LE: return AFMT_S16_LE;
178 case SNDRV_PCM_FORMAT_S16_BE: return AFMT_S16_BE;
179 case SNDRV_PCM_FORMAT_S8: return AFMT_S8;
180 case SNDRV_PCM_FORMAT_U16_LE: return AFMT_U16_LE;
181 case SNDRV_PCM_FORMAT_U16_BE: return AFMT_U16_BE;
182 case SNDRV_PCM_FORMAT_MPEG: return AFMT_MPEG;
183 default: return -EINVAL;
184 }
185}
186
187static int snd_pcm_oss_period_size(snd_pcm_substream_t *substream,
188 snd_pcm_hw_params_t *oss_params,
189 snd_pcm_hw_params_t *slave_params)
190{
191 size_t s;
192 size_t oss_buffer_size, oss_period_size, oss_periods;
193 size_t min_period_size, max_period_size;
194 snd_pcm_runtime_t *runtime = substream->runtime;
195 size_t oss_frame_size;
196
197 oss_frame_size = snd_pcm_format_physical_width(params_format(oss_params)) *
198 params_channels(oss_params) / 8;
199
200 oss_buffer_size = snd_pcm_plug_client_size(substream,
201 snd_pcm_hw_param_value_max(slave_params, SNDRV_PCM_HW_PARAM_BUFFER_SIZE, NULL)) * oss_frame_size;
202 oss_buffer_size = 1 << ld2(oss_buffer_size);
203 if (atomic_read(&runtime->mmap_count)) {
204 if (oss_buffer_size > runtime->oss.mmap_bytes)
205 oss_buffer_size = runtime->oss.mmap_bytes;
206 }
207
208 if (substream->oss.setup &&
209 substream->oss.setup->period_size > 16)
210 oss_period_size = substream->oss.setup->period_size;
211 else if (runtime->oss.fragshift) {
212 oss_period_size = 1 << runtime->oss.fragshift;
213 if (oss_period_size > oss_buffer_size / 2)
214 oss_period_size = oss_buffer_size / 2;
215 } else {
216 int sd;
217 size_t bytes_per_sec = params_rate(oss_params) * snd_pcm_format_physical_width(params_format(oss_params)) * params_channels(oss_params) / 8;
218
219 oss_period_size = oss_buffer_size;
220 do {
221 oss_period_size /= 2;
222 } while (oss_period_size > bytes_per_sec);
223 if (runtime->oss.subdivision == 0) {
224 sd = 4;
225 if (oss_period_size / sd > 4096)
226 sd *= 2;
227 if (oss_period_size / sd < 4096)
228 sd = 1;
229 } else
230 sd = runtime->oss.subdivision;
231 oss_period_size /= sd;
232 if (oss_period_size < 16)
233 oss_period_size = 16;
234 }
235
236 min_period_size = snd_pcm_plug_client_size(substream,
237 snd_pcm_hw_param_value_min(slave_params, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, NULL));
238 min_period_size *= oss_frame_size;
239 min_period_size = 1 << (ld2(min_period_size - 1) + 1);
240 if (oss_period_size < min_period_size)
241 oss_period_size = min_period_size;
242
243 max_period_size = snd_pcm_plug_client_size(substream,
244 snd_pcm_hw_param_value_max(slave_params, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, NULL));
245 max_period_size *= oss_frame_size;
246 max_period_size = 1 << ld2(max_period_size);
247 if (oss_period_size > max_period_size)
248 oss_period_size = max_period_size;
249
250 oss_periods = oss_buffer_size / oss_period_size;
251
252 if (substream->oss.setup) {
253 if (substream->oss.setup->periods > 1)
254 oss_periods = substream->oss.setup->periods;
255 }
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
279static int choose_rate(snd_pcm_substream_t *substream,
280 snd_pcm_hw_params_t *params, unsigned int best_rate)
281{
282 snd_interval_t *it;
283 snd_pcm_hw_params_t *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
319static int snd_pcm_oss_change_params(snd_pcm_substream_t *substream)
320{
321 snd_pcm_runtime_t *runtime = substream->runtime;
322 snd_pcm_hw_params_t *params, *sparams;
323 snd_pcm_sw_params_t *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 snd_mask_t sformat_mask;
330 snd_mask_t 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 snd_pcm_oss_setup_t *setup = substream->oss.setup;
345 direct = (setup != NULL && setup->direct);
346 }
347
348 _snd_pcm_hw_params_any(sparams);
349 _snd_pcm_hw_param_setinteger(sparams, SNDRV_PCM_HW_PARAM_PERIODS);
350 _snd_pcm_hw_param_min(sparams, SNDRV_PCM_HW_PARAM_PERIODS, 2, 0);
351 snd_mask_none(&mask);
352 if (atomic_read(&runtime->mmap_count))
353 snd_mask_set(&mask, SNDRV_PCM_ACCESS_MMAP_INTERLEAVED);
354 else {
355 snd_mask_set(&mask, SNDRV_PCM_ACCESS_RW_INTERLEAVED);
356 if (!direct)
357 snd_mask_set(&mask, SNDRV_PCM_ACCESS_RW_NONINTERLEAVED);
358 }
359 err = snd_pcm_hw_param_mask(substream, sparams, SNDRV_PCM_HW_PARAM_ACCESS, &mask);
360 if (err < 0) {
361 snd_printd("No usable accesses\n");
362 err = -EINVAL;
363 goto failure;
364 }
365 choose_rate(substream, sparams, runtime->oss.rate);
366 snd_pcm_hw_param_near(substream, sparams, SNDRV_PCM_HW_PARAM_CHANNELS, runtime->oss.channels, NULL);
367
368 format = snd_pcm_oss_format_from(runtime->oss.format);
369
370 sformat_mask = *hw_param_mask(sparams, SNDRV_PCM_HW_PARAM_FORMAT);
371 if (direct)
372 sformat = format;
373 else
374 sformat = snd_pcm_plug_slave_format(format, &sformat_mask);
375
376 if (sformat < 0 || !snd_mask_test(&sformat_mask, sformat)) {
377 for (sformat = 0; sformat <= SNDRV_PCM_FORMAT_LAST; sformat++) {
378 if (snd_mask_test(&sformat_mask, sformat) &&
379 snd_pcm_oss_format_to(sformat) >= 0)
380 break;
381 }
382 if (sformat > SNDRV_PCM_FORMAT_LAST) {
383 snd_printd("Cannot find a format!!!\n");
384 err = -EINVAL;
385 goto failure;
386 }
387 }
388 err = _snd_pcm_hw_param_set(sparams, SNDRV_PCM_HW_PARAM_FORMAT, sformat, 0);
389 snd_assert(err >= 0, goto failure);
390
391 if (direct) {
392 memcpy(params, sparams, sizeof(*params));
393 } else {
394 _snd_pcm_hw_params_any(params);
395 _snd_pcm_hw_param_set(params, SNDRV_PCM_HW_PARAM_ACCESS,
396 SNDRV_PCM_ACCESS_RW_INTERLEAVED, 0);
397 _snd_pcm_hw_param_set(params, SNDRV_PCM_HW_PARAM_FORMAT,
398 snd_pcm_oss_format_from(runtime->oss.format), 0);
399 _snd_pcm_hw_param_set(params, SNDRV_PCM_HW_PARAM_CHANNELS,
400 runtime->oss.channels, 0);
401 _snd_pcm_hw_param_set(params, SNDRV_PCM_HW_PARAM_RATE,
402 runtime->oss.rate, 0);
403 pdprintf("client: access = %i, format = %i, channels = %i, rate = %i\n",
404 params_access(params), params_format(params),
405 params_channels(params), params_rate(params));
406 }
407 pdprintf("slave: access = %i, format = %i, channels = %i, rate = %i\n",
408 params_access(sparams), params_format(sparams),
409 params_channels(sparams), params_rate(sparams));
410
411 oss_frame_size = snd_pcm_format_physical_width(params_format(params)) *
412 params_channels(params) / 8;
413
414 snd_pcm_oss_plugin_clear(substream);
415 if (!direct) {
416 /* add necessary plugins */
417 snd_pcm_oss_plugin_clear(substream);
418 if ((err = snd_pcm_plug_format_plugins(substream,
419 params,
420 sparams)) < 0) {
421 snd_printd("snd_pcm_plug_format_plugins failed: %i\n", err);
422 snd_pcm_oss_plugin_clear(substream);
423 goto failure;
424 }
425 if (runtime->oss.plugin_first) {
426 snd_pcm_plugin_t *plugin;
427 if ((err = snd_pcm_plugin_build_io(substream, sparams, &plugin)) < 0) {
428 snd_printd("snd_pcm_plugin_build_io failed: %i\n", err);
429 snd_pcm_oss_plugin_clear(substream);
430 goto failure;
431 }
432 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
433 err = snd_pcm_plugin_append(plugin);
434 } else {
435 err = snd_pcm_plugin_insert(plugin);
436 }
437 if (err < 0) {
438 snd_pcm_oss_plugin_clear(substream);
439 goto failure;
440 }
441 }
442 }
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;
004e6538
TI		 476 sw_params->avail_min = substream->stream == SNDRV_PCM_STREAM_PLAYBACK ?
477 1 : runtime->period_size;
1da177e4
LT		 478 sw_params->xfer_align = 1;
479 if (atomic_read(&runtime->mmap_count) ||
480 (substream->oss.setup && 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 if (runtime->oss.plugin_first) {
501 err = snd_pcm_plug_alloc(substream, oss_period_size);
502 if (err < 0)
503 goto failure;
504 }
505 oss_period_size *= oss_frame_size;
506
507 oss_buffer_size = oss_period_size * runtime->oss.periods;
508 snd_assert(oss_buffer_size >= 0, err = -EINVAL; goto failure);
509
510 runtime->oss.period_bytes = oss_period_size;
511 runtime->oss.buffer_bytes = oss_buffer_size;
512
513 pdprintf("oss: period bytes = %i, buffer bytes = %i\n",
514 runtime->oss.period_bytes,
515 runtime->oss.buffer_bytes);
516 pdprintf("slave: period_size = %i, buffer_size = %i\n",
517 params_period_size(sparams),
518 params_buffer_size(sparams));
519
520 runtime->oss.format = snd_pcm_oss_format_to(params_format(params));
521 runtime->oss.channels = params_channels(params);
522 runtime->oss.rate = params_rate(params);
523
524 runtime->oss.params = 0;
525 runtime->oss.prepare = 1;
526 vfree(runtime->oss.buffer);
527 runtime->oss.buffer = vmalloc(runtime->oss.period_bytes);
528 runtime->oss.buffer_used = 0;
529 if (runtime->dma_area)
530 snd_pcm_format_set_silence(runtime->format, runtime->dma_area, bytes_to_samples(runtime, runtime->dma_bytes));
531
532 runtime->oss.period_frames = snd_pcm_alsa_frames(substream, oss_period_size);
533
534 err = 0;
535failure:
536 kfree(sw_params);
537 kfree(params);
538 kfree(sparams);
539 return err;
540}
541
542static int snd_pcm_oss_get_active_substream(snd_pcm_oss_file_t *pcm_oss_file, snd_pcm_substream_t **r_substream)
543{
544 int idx, err;
545 snd_pcm_substream_t *asubstream = NULL, *substream;
546
547 for (idx = 0; idx < 2; idx++) {
548 substream = pcm_oss_file->streams[idx];
549 if (substream == NULL)
550 continue;
551 if (asubstream == NULL)
552 asubstream = substream;
553 if (substream->runtime->oss.params) {
554 err = snd_pcm_oss_change_params(substream);
555 if (err < 0)
556 return err;
557 }
558 }
559 snd_assert(asubstream != NULL, return -EIO);
560 if (r_substream)
561 *r_substream = asubstream;
562 return 0;
563}
564
565static int snd_pcm_oss_prepare(snd_pcm_substream_t *substream)
566{
567 int err;
568 snd_pcm_runtime_t *runtime = substream->runtime;
569
570 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_PREPARE, NULL);
571 if (err < 0) {
572 snd_printd("snd_pcm_oss_prepare: SNDRV_PCM_IOCTL_PREPARE failed\n");
573 return err;
574 }
575 runtime->oss.prepare = 0;
576 runtime->oss.prev_hw_ptr_interrupt = 0;
577 runtime->oss.period_ptr = 0;
578 runtime->oss.buffer_used = 0;
579
580 return 0;
581}
582
583static int snd_pcm_oss_make_ready(snd_pcm_substream_t *substream)
584{
585 snd_pcm_runtime_t *runtime;
586 int err;
587
588 if (substream == NULL)
589 return 0;
590 runtime = substream->runtime;
591 if (runtime->oss.params) {
592 err = snd_pcm_oss_change_params(substream);
593 if (err < 0)
594 return err;
595 }
596 if (runtime->oss.prepare) {
597 err = snd_pcm_oss_prepare(substream);
598 if (err < 0)
599 return err;
600 }
601 return 0;
602}
603
604static int snd_pcm_oss_capture_position_fixup(snd_pcm_substream_t *substream, snd_pcm_sframes_t *delay)
605{
606 snd_pcm_runtime_t *runtime;
607 snd_pcm_uframes_t frames;
608 int err = 0;
609
610 while (1) {
611 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DELAY, delay);
612 if (err < 0)
613 break;
614 runtime = substream->runtime;
615 if (*delay <= (snd_pcm_sframes_t)runtime->buffer_size)
616 break;
617 /* in case of overrun, skip whole periods like OSS/Linux driver does */
618 /* until avail(delay) <= buffer_size */
619 frames = (*delay - runtime->buffer_size) + runtime->period_size - 1;
620 frames /= runtime->period_size;
621 frames *= runtime->period_size;
622 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_FORWARD, &frames);
623 if (err < 0)
624 break;
625 }
626 return err;
627}
628
629snd_pcm_sframes_t snd_pcm_oss_write3(snd_pcm_substream_t *substream, const char *ptr, snd_pcm_uframes_t frames, int in_kernel)
630{
631 snd_pcm_runtime_t *runtime = substream->runtime;
632 int ret;
633 while (1) {
634 if (runtime->status->state == SNDRV_PCM_STATE_XRUN ||
635 runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) {
636#ifdef OSS_DEBUG
637 if (runtime->status->state == SNDRV_PCM_STATE_XRUN)
638 printk("pcm_oss: write: recovering from XRUN\n");
639 else
640 printk("pcm_oss: write: recovering from SUSPEND\n");
641#endif
642 ret = snd_pcm_oss_prepare(substream);
643 if (ret < 0)
644 break;
645 }
646 if (in_kernel) {
647 mm_segment_t fs;
648 fs = snd_enter_user();
649 ret = snd_pcm_lib_write(substream, (void __user *)ptr, frames);
650 snd_leave_user(fs);
651 } else {
652 ret = snd_pcm_lib_write(substream, (void __user *)ptr, frames);
653 }
654 if (ret != -EPIPE && ret != -ESTRPIPE)
655 break;
656 /* test, if we can't store new data, because the stream */
657 /* has not been started */
658 if (runtime->status->state == SNDRV_PCM_STATE_PREPARED)
659 return -EAGAIN;
660 }
661 return ret;
662}
663
664snd_pcm_sframes_t snd_pcm_oss_read3(snd_pcm_substream_t *substream, char *ptr, snd_pcm_uframes_t frames, int in_kernel)
665{
666 snd_pcm_runtime_t *runtime = substream->runtime;
667 snd_pcm_sframes_t delay;
668 int ret;
669 while (1) {
670 if (runtime->status->state == SNDRV_PCM_STATE_XRUN ||
671 runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) {
672#ifdef OSS_DEBUG
673 if (runtime->status->state == SNDRV_PCM_STATE_XRUN)
674 printk("pcm_oss: read: recovering from XRUN\n");
675 else
676 printk("pcm_oss: read: recovering from SUSPEND\n");
677#endif
678 ret = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DRAIN, NULL);
679 if (ret < 0)
680 break;
681 } else if (runtime->status->state == SNDRV_PCM_STATE_SETUP) {
682 ret = snd_pcm_oss_prepare(substream);
683 if (ret < 0)
684 break;
685 }
686 ret = snd_pcm_oss_capture_position_fixup(substream, &delay);
687 if (ret < 0)
688 break;
689 if (in_kernel) {
690 mm_segment_t fs;
691 fs = snd_enter_user();
692 ret = snd_pcm_lib_read(substream, (void __user *)ptr, frames);
693 snd_leave_user(fs);
694 } else {
695 ret = snd_pcm_lib_read(substream, (void __user *)ptr, frames);
696 }
697 if (ret == -EPIPE) {
698 if (runtime->status->state == SNDRV_PCM_STATE_DRAINING) {
699 ret = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DROP, NULL);
700 if (ret < 0)
701 break;
702 }
703 continue;
704 }
705 if (ret != -ESTRPIPE)
706 break;
707 }
708 return ret;
709}
710
711snd_pcm_sframes_t snd_pcm_oss_writev3(snd_pcm_substream_t *substream, void **bufs, snd_pcm_uframes_t frames, int in_kernel)
712{
713 snd_pcm_runtime_t *runtime = substream->runtime;
714 int ret;
715 while (1) {
716 if (runtime->status->state == SNDRV_PCM_STATE_XRUN ||
717 runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) {
718#ifdef OSS_DEBUG
719 if (runtime->status->state == SNDRV_PCM_STATE_XRUN)
720 printk("pcm_oss: writev: recovering from XRUN\n");
721 else
722 printk("pcm_oss: writev: recovering from SUSPEND\n");
723#endif
724 ret = snd_pcm_oss_prepare(substream);
725 if (ret < 0)
726 break;
727 }
728 if (in_kernel) {
729 mm_segment_t fs;
730 fs = snd_enter_user();
731 ret = snd_pcm_lib_writev(substream, (void __user **)bufs, frames);
732 snd_leave_user(fs);
733 } else {
734 ret = snd_pcm_lib_writev(substream, (void __user **)bufs, frames);
735 }
736 if (ret != -EPIPE && ret != -ESTRPIPE)
737 break;
738
739 /* test, if we can't store new data, because the stream */
740 /* has not been started */
741 if (runtime->status->state == SNDRV_PCM_STATE_PREPARED)
742 return -EAGAIN;
743 }
744 return ret;
745}
746
747snd_pcm_sframes_t snd_pcm_oss_readv3(snd_pcm_substream_t *substream, void **bufs, snd_pcm_uframes_t frames, int in_kernel)
748{
749 snd_pcm_runtime_t *runtime = substream->runtime;
750 int ret;
751 while (1) {
752 if (runtime->status->state == SNDRV_PCM_STATE_XRUN ||
753 runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) {
754#ifdef OSS_DEBUG
755 if (runtime->status->state == SNDRV_PCM_STATE_XRUN)
756 printk("pcm_oss: readv: recovering from XRUN\n");
757 else
758 printk("pcm_oss: readv: recovering from SUSPEND\n");
759#endif
760 ret = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DRAIN, NULL);
761 if (ret < 0)
762 break;
763 } else if (runtime->status->state == SNDRV_PCM_STATE_SETUP) {
764 ret = snd_pcm_oss_prepare(substream);
765 if (ret < 0)
766 break;
767 }
768 if (in_kernel) {
769 mm_segment_t fs;
770 fs = snd_enter_user();
771 ret = snd_pcm_lib_readv(substream, (void __user **)bufs, frames);
772 snd_leave_user(fs);
773 } else {
774 ret = snd_pcm_lib_readv(substream, (void __user **)bufs, frames);
775 }
776 if (ret != -EPIPE && ret != -ESTRPIPE)
777 break;
778 }
779 return ret;
780}
781
782static ssize_t snd_pcm_oss_write2(snd_pcm_substream_t *substream, const char *buf, size_t bytes, int in_kernel)
783{
784 snd_pcm_runtime_t *runtime = substream->runtime;
785 snd_pcm_sframes_t frames, frames1;
786 if (runtime->oss.plugin_first) {
787 snd_pcm_plugin_channel_t *channels;
788 size_t oss_frame_bytes = (runtime->oss.plugin_first->src_width * runtime->oss.plugin_first->src_format.channels) / 8;
789 if (!in_kernel) {
790 if (copy_from_user(runtime->oss.buffer, (const char __user *)buf, bytes))
791 return -EFAULT;
792 buf = runtime->oss.buffer;
793 }
794 frames = bytes / oss_frame_bytes;
795 frames1 = snd_pcm_plug_client_channels_buf(substream, (char *)buf, frames, &channels);
796 if (frames1 < 0)
797 return frames1;
798 frames1 = snd_pcm_plug_write_transfer(substream, channels, frames1);
799 if (frames1 <= 0)
800 return frames1;
801 bytes = frames1 * oss_frame_bytes;
802 } else {
803 frames = bytes_to_frames(runtime, bytes);
804 frames1 = snd_pcm_oss_write3(substream, buf, frames, in_kernel);
805 if (frames1 <= 0)
806 return frames1;
807 bytes = frames_to_bytes(runtime, frames1);
808 }
809 return bytes;
810}
811
812static ssize_t snd_pcm_oss_write1(snd_pcm_substream_t *substream, const char __user *buf, size_t bytes)
813{
814 size_t xfer = 0;
815 ssize_t tmp;
816 snd_pcm_runtime_t *runtime = substream->runtime;
817
818 if (atomic_read(&runtime->mmap_count))
819 return -ENXIO;
820
821 if ((tmp = snd_pcm_oss_make_ready(substream)) < 0)
822 return tmp;
823 while (bytes > 0) {
824 if (bytes < runtime->oss.period_bytes || runtime->oss.buffer_used > 0) {
825 tmp = bytes;
826 if (tmp + runtime->oss.buffer_used > runtime->oss.period_bytes)
827 tmp = runtime->oss.period_bytes - runtime->oss.buffer_used;
828 if (tmp > 0) {
829 if (copy_from_user(runtime->oss.buffer + runtime->oss.buffer_used, buf, tmp))
830 return xfer > 0 ? (snd_pcm_sframes_t)xfer : -EFAULT;
831 }
832 runtime->oss.buffer_used += tmp;
833 buf += tmp;
834 bytes -= tmp;
835 xfer += tmp;
836 if ((substream->oss.setup != NULL && substream->oss.setup->partialfrag) ||
837 runtime->oss.buffer_used == runtime->oss.period_bytes) {
838 tmp = snd_pcm_oss_write2(substream, runtime->oss.buffer + runtime->oss.period_ptr,
839 runtime->oss.buffer_used - runtime->oss.period_ptr, 1);
840 if (tmp <= 0)
841 return xfer > 0 ? (snd_pcm_sframes_t)xfer : tmp;
842 runtime->oss.bytes += tmp;
843 runtime->oss.period_ptr += tmp;
844 runtime->oss.period_ptr %= runtime->oss.period_bytes;
845 if (runtime->oss.period_ptr == 0 ||
846 runtime->oss.period_ptr == runtime->oss.buffer_used)
847 runtime->oss.buffer_used = 0;
848 else if ((substream->ffile->f_flags & O_NONBLOCK) != 0)
849 return xfer > 0 ? xfer : -EAGAIN;
850 }
851 } else {
852 tmp = snd_pcm_oss_write2(substream, (const char *)buf, runtime->oss.period_bytes, 0);
853 if (tmp <= 0)
854 return xfer > 0 ? (snd_pcm_sframes_t)xfer : tmp;
855 runtime->oss.bytes += tmp;
856 buf += tmp;
857 bytes -= tmp;
858 xfer += tmp;
859 if ((substream->ffile->f_flags & O_NONBLOCK) != 0 &&
860 tmp != runtime->oss.period_bytes)
861 break;
862 }
863 }
864 return xfer;
865}
866
867static ssize_t snd_pcm_oss_read2(snd_pcm_substream_t *substream, char *buf, size_t bytes, int in_kernel)
868{
869 snd_pcm_runtime_t *runtime = substream->runtime;
870 snd_pcm_sframes_t frames, frames1;
871 char __user *final_dst = (char __user *)buf;
872 if (runtime->oss.plugin_first) {
873 snd_pcm_plugin_channel_t *channels;
874 size_t oss_frame_bytes = (runtime->oss.plugin_last->dst_width * runtime->oss.plugin_last->dst_format.channels) / 8;
875 if (!in_kernel)
876 buf = runtime->oss.buffer;
877 frames = bytes / oss_frame_bytes;
878 frames1 = snd_pcm_plug_client_channels_buf(substream, buf, frames, &channels);
879 if (frames1 < 0)
880 return frames1;
881 frames1 = snd_pcm_plug_read_transfer(substream, channels, frames1);
882 if (frames1 <= 0)
883 return frames1;
884 bytes = frames1 * oss_frame_bytes;
885 if (!in_kernel && copy_to_user(final_dst, buf, bytes))
886 return -EFAULT;
887 } else {
888 frames = bytes_to_frames(runtime, bytes);
889 frames1 = snd_pcm_oss_read3(substream, buf, frames, in_kernel);
890 if (frames1 <= 0)
891 return frames1;
892 bytes = frames_to_bytes(runtime, frames1);
893 }
894 return bytes;
895}
896
897static ssize_t snd_pcm_oss_read1(snd_pcm_substream_t *substream, char __user *buf, size_t bytes)
898{
899 size_t xfer = 0;
900 ssize_t tmp;
901 snd_pcm_runtime_t *runtime = substream->runtime;
902
903 if (atomic_read(&runtime->mmap_count))
904 return -ENXIO;
905
906 if ((tmp = snd_pcm_oss_make_ready(substream)) < 0)
907 return tmp;
908 while (bytes > 0) {
909 if (bytes < runtime->oss.period_bytes || runtime->oss.buffer_used > 0) {
910 if (runtime->oss.buffer_used == 0) {
911 tmp = snd_pcm_oss_read2(substream, runtime->oss.buffer, runtime->oss.period_bytes, 1);
912 if (tmp <= 0)
913 return xfer > 0 ? (snd_pcm_sframes_t)xfer : tmp;
914 runtime->oss.bytes += tmp;
915 runtime->oss.period_ptr = tmp;
916 runtime->oss.buffer_used = tmp;
917 }
918 tmp = bytes;
919 if ((size_t) tmp > runtime->oss.buffer_used)
920 tmp = runtime->oss.buffer_used;
921 if (copy_to_user(buf, runtime->oss.buffer + (runtime->oss.period_ptr - runtime->oss.buffer_used), tmp))
922 return xfer > 0 ? (snd_pcm_sframes_t)xfer : -EFAULT;
923 buf += tmp;
924 bytes -= tmp;
925 xfer += tmp;
926 runtime->oss.buffer_used -= tmp;
927 } else {
928 tmp = snd_pcm_oss_read2(substream, (char *)buf, runtime->oss.period_bytes, 0);
929 if (tmp <= 0)
930 return xfer > 0 ? (snd_pcm_sframes_t)xfer : tmp;
931 runtime->oss.bytes += tmp;
932 buf += tmp;
933 bytes -= tmp;
934 xfer += tmp;
935 }
936 }
937 return xfer;
938}
939
940static int snd_pcm_oss_reset(snd_pcm_oss_file_t *pcm_oss_file)
941{
942 snd_pcm_substream_t *substream;
943
944 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
945 if (substream != NULL) {
946 snd_pcm_kernel_playback_ioctl(substream, SNDRV_PCM_IOCTL_DROP, NULL);
947 substream->runtime->oss.prepare = 1;
948 }
949 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
950 if (substream != NULL) {
951 snd_pcm_kernel_capture_ioctl(substream, SNDRV_PCM_IOCTL_DROP, NULL);
952 substream->runtime->oss.prepare = 1;
953 }
954 return 0;
955}
956
957static int snd_pcm_oss_post(snd_pcm_oss_file_t *pcm_oss_file)
958{
959 snd_pcm_substream_t *substream;
960 int err;
961
962 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
963 if (substream != NULL) {
964 if ((err = snd_pcm_oss_make_ready(substream)) < 0)
965 return err;
966 snd_pcm_kernel_playback_ioctl(substream, SNDRV_PCM_IOCTL_START, NULL);
967 }
968 /* note: all errors from the start action are ignored */
969 /* OSS apps do not know, how to handle them */
970 return 0;
971}
972
973static int snd_pcm_oss_sync1(snd_pcm_substream_t *substream, size_t size)
974{
975 snd_pcm_runtime_t *runtime;
976 ssize_t result = 0;
977 long res;
978 wait_queue_t wait;
979
980 runtime = substream->runtime;
981 init_waitqueue_entry(&wait, current);
982 add_wait_queue(&runtime->sleep, &wait);
983#ifdef OSS_DEBUG
984 printk("sync1: size = %li\n", size);
985#endif
986 while (1) {
987 result = snd_pcm_oss_write2(substream, runtime->oss.buffer, size, 1);
988 if (result > 0) {
989 runtime->oss.buffer_used = 0;
990 result = 0;
991 break;
992 }
993 if (result != 0 && result != -EAGAIN)
994 break;
995 result = 0;
996 set_current_state(TASK_INTERRUPTIBLE);
997 snd_pcm_stream_lock_irq(substream);
998 res = runtime->status->state;
999 snd_pcm_stream_unlock_irq(substream);
1000 if (res != SNDRV_PCM_STATE_RUNNING) {
1001 set_current_state(TASK_RUNNING);
1002 break;
1003 }
1004 res = schedule_timeout(10 * HZ);
1005 if (signal_pending(current)) {
1006 result = -ERESTARTSYS;
1007 break;
1008 }
1009 if (res == 0) {
1010 snd_printk(KERN_ERR "OSS sync error - DMA timeout\n");
1011 result = -EIO;
1012 break;
1013 }
1014 }
1015 remove_wait_queue(&runtime->sleep, &wait);
1016 return result;
1017}
1018
1019static int snd_pcm_oss_sync(snd_pcm_oss_file_t *pcm_oss_file)
1020{
1021 int err = 0;
1022 unsigned int saved_f_flags;
1023 snd_pcm_substream_t *substream;
1024 snd_pcm_runtime_t *runtime;
1025 snd_pcm_format_t format;
1026 unsigned long width;
1027 size_t size;
1028
1029 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
1030 if (substream != NULL) {
1031 runtime = substream->runtime;
1032 if (atomic_read(&runtime->mmap_count))
1033 goto __direct;
1034 if ((err = snd_pcm_oss_make_ready(substream)) < 0)
1035 return err;
1036 format = snd_pcm_oss_format_from(runtime->oss.format);
1037 width = snd_pcm_format_physical_width(format);
1038 if (runtime->oss.buffer_used > 0) {
1039#ifdef OSS_DEBUG
1040 printk("sync: buffer_used\n");
1041#endif
1042 size = (8 * (runtime->oss.period_bytes - runtime->oss.buffer_used) + 7) / width;
1043 snd_pcm_format_set_silence(format,
1044 runtime->oss.buffer + runtime->oss.buffer_used,
1045 size);
1046 err = snd_pcm_oss_sync1(substream, runtime->oss.period_bytes);
1047 if (err < 0)
1048 return err;
1049 } else if (runtime->oss.period_ptr > 0) {
1050#ifdef OSS_DEBUG
1051 printk("sync: period_ptr\n");
1052#endif
1053 size = runtime->oss.period_bytes - runtime->oss.period_ptr;
1054 snd_pcm_format_set_silence(format,
1055 runtime->oss.buffer,
1056 size * 8 / width);
1057 err = snd_pcm_oss_sync1(substream, size);
1058 if (err < 0)
1059 return err;
1060 }
1061 /*
1062 * The ALSA's period might be a bit large than OSS one.
1063 * Fill the remain portion of ALSA period with zeros.
1064 */
1065 size = runtime->control->appl_ptr % runtime->period_size;
1066 if (size > 0) {
1067 size = runtime->period_size - size;
1068 if (runtime->access == SNDRV_PCM_ACCESS_RW_INTERLEAVED) {
1069 size = (runtime->frame_bits * size) / 8;
1070 while (size > 0) {
1071 mm_segment_t fs;
1072 size_t size1 = size < runtime->oss.period_bytes ? size : runtime->oss.period_bytes;
1073 size -= size1;
1074 size1 *= 8;
1075 size1 /= runtime->sample_bits;
1076 snd_pcm_format_set_silence(runtime->format,
1077 runtime->oss.buffer,
1078 size1);
1079 fs = snd_enter_user();
1080 snd_pcm_lib_write(substream, (void __user *)runtime->oss.buffer, size1);
1081 snd_leave_user(fs);
1082 }
1083 } else if (runtime->access == SNDRV_PCM_ACCESS_RW_NONINTERLEAVED) {
1084 void __user *buffers[runtime->channels];
1085 memset(buffers, 0, runtime->channels * sizeof(void *));
1086 snd_pcm_lib_writev(substream, buffers, size);
1087 }
1088 }
1089 /*
1090 * finish sync: drain the buffer
1091 */
1092 __direct:
1093 saved_f_flags = substream->ffile->f_flags;
1094 substream->ffile->f_flags &= ~O_NONBLOCK;
1095 err = snd_pcm_kernel_playback_ioctl(substream, SNDRV_PCM_IOCTL_DRAIN, NULL);
1096 substream->ffile->f_flags = saved_f_flags;
1097 if (err < 0)
1098 return err;
1099 runtime->oss.prepare = 1;
1100 }
1101
1102 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
1103 if (substream != NULL) {
1104 if ((err = snd_pcm_oss_make_ready(substream)) < 0)
1105 return err;
1106 runtime = substream->runtime;
1107 err = snd_pcm_kernel_capture_ioctl(substream, SNDRV_PCM_IOCTL_DROP, NULL);
1108 if (err < 0)
1109 return err;
1110 runtime->oss.buffer_used = 0;
1111 runtime->oss.prepare = 1;
1112 }
1113 return 0;
1114}
1115
1116static int snd_pcm_oss_set_rate(snd_pcm_oss_file_t *pcm_oss_file, int rate)
1117{
1118 int idx;
1119
1120 for (idx = 1; idx >= 0; --idx) {
1121 snd_pcm_substream_t *substream = pcm_oss_file->streams[idx];
1122 snd_pcm_runtime_t *runtime;
1123 if (substream == NULL)
1124 continue;
1125 runtime = substream->runtime;
1126 if (rate < 1000)
1127 rate = 1000;
1128 else if (rate > 192000)
1129 rate = 192000;
1130 if (runtime->oss.rate != rate) {
1131 runtime->oss.params = 1;
1132 runtime->oss.rate = rate;
1133 }
1134 }
1135 return snd_pcm_oss_get_rate(pcm_oss_file);
1136}
1137
1138static int snd_pcm_oss_get_rate(snd_pcm_oss_file_t *pcm_oss_file)
1139{
1140 snd_pcm_substream_t *substream;
1141 int err;
1142
1143 if ((err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream)) < 0)
1144 return err;
1145 return substream->runtime->oss.rate;
1146}
1147
1148static int snd_pcm_oss_set_channels(snd_pcm_oss_file_t *pcm_oss_file, unsigned int channels)
1149{
1150 int idx;
1151 if (channels < 1)
1152 channels = 1;
1153 if (channels > 128)
1154 return -EINVAL;
1155 for (idx = 1; idx >= 0; --idx) {
1156 snd_pcm_substream_t *substream = pcm_oss_file->streams[idx];
1157 snd_pcm_runtime_t *runtime;
1158 if (substream == NULL)
1159 continue;
1160 runtime = substream->runtime;
1161 if (runtime->oss.channels != channels) {
1162 runtime->oss.params = 1;
1163 runtime->oss.channels = channels;
1164 }
1165 }
1166 return snd_pcm_oss_get_channels(pcm_oss_file);
1167}
1168
1169static int snd_pcm_oss_get_channels(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.channels;
1177}
1178
1179static int snd_pcm_oss_get_block_size(snd_pcm_oss_file_t *pcm_oss_file)
1180{
1181 snd_pcm_substream_t *substream;
1182 int err;
1183
1184 if ((err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream)) < 0)
1185 return err;
1186 return substream->runtime->oss.period_bytes;
1187}
1188
1189static int snd_pcm_oss_get_formats(snd_pcm_oss_file_t *pcm_oss_file)
1190{
1191 snd_pcm_substream_t *substream;
1192 int err;
1193 int direct;
1194 snd_pcm_hw_params_t *params;
1195 unsigned int formats = 0;
1196 snd_mask_t format_mask;
1197 int fmt;
1198
1199 if ((err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream)) < 0)
1200 return err;
1201 if (atomic_read(&substream->runtime->mmap_count)) {
1202 direct = 1;
1203 } else {
1204 snd_pcm_oss_setup_t *setup = substream->oss.setup;
1205 direct = (setup != NULL && setup->direct);
1206 }
1207 if (!direct)
1208 return AFMT_MU_LAW | AFMT_U8 |
1209 AFMT_S16_LE | AFMT_S16_BE |
1210 AFMT_S8 | AFMT_U16_LE |
1211 AFMT_U16_BE;
1212 params = kmalloc(sizeof(*params), GFP_KERNEL);
1213 if (!params)
1214 return -ENOMEM;
1215 _snd_pcm_hw_params_any(params);
1216 err = snd_pcm_hw_refine(substream, params);
1217 format_mask = *hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT);
1218 kfree(params);
1219 snd_assert(err >= 0, return err);
1220 for (fmt = 0; fmt < 32; ++fmt) {
1221 if (snd_mask_test(&format_mask, fmt)) {
1222 int f = snd_pcm_oss_format_to(fmt);
1223 if (f >= 0)
1224 formats |= f;
1225 }
1226 }
1227 return formats;
1228}
1229
1230static int snd_pcm_oss_set_format(snd_pcm_oss_file_t *pcm_oss_file, int format)
1231{
1232 int formats, idx;
1233
1234 if (format != AFMT_QUERY) {
1235 formats = snd_pcm_oss_get_formats(pcm_oss_file);
1236 if (!(formats & format))
1237 format = AFMT_U8;
1238 for (idx = 1; idx >= 0; --idx) {
1239 snd_pcm_substream_t *substream = pcm_oss_file->streams[idx];
1240 snd_pcm_runtime_t *runtime;
1241 if (substream == NULL)
1242 continue;
1243 runtime = substream->runtime;
1244 if (runtime->oss.format != format) {
1245 runtime->oss.params = 1;
1246 runtime->oss.format = format;
1247 }
1248 }
1249 }
1250 return snd_pcm_oss_get_format(pcm_oss_file);
1251}
1252
1253static int snd_pcm_oss_get_format(snd_pcm_oss_file_t *pcm_oss_file)
1254{
1255 snd_pcm_substream_t *substream;
1256 int err;
1257
1258 if ((err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream)) < 0)
1259 return err;
1260 return substream->runtime->oss.format;
1261}
1262
1263static int snd_pcm_oss_set_subdivide1(snd_pcm_substream_t *substream, int subdivide)
1264{
1265 snd_pcm_runtime_t *runtime;
1266
1267 if (substream == NULL)
1268 return 0;
1269 runtime = substream->runtime;
1270 if (subdivide == 0) {
1271 subdivide = runtime->oss.subdivision;
1272 if (subdivide == 0)
1273 subdivide = 1;
1274 return subdivide;
1275 }
1276 if (runtime->oss.subdivision || runtime->oss.fragshift)
1277 return -EINVAL;
1278 if (subdivide != 1 && subdivide != 2 && subdivide != 4 &&
1279 subdivide != 8 && subdivide != 16)
1280 return -EINVAL;
1281 runtime->oss.subdivision = subdivide;
1282 runtime->oss.params = 1;
1283 return subdivide;
1284}
1285
1286static int snd_pcm_oss_set_subdivide(snd_pcm_oss_file_t *pcm_oss_file, int subdivide)
1287{
1288 int err = -EINVAL, idx;
1289
1290 for (idx = 1; idx >= 0; --idx) {
1291 snd_pcm_substream_t *substream = pcm_oss_file->streams[idx];
1292 if (substream == NULL)
1293 continue;
1294 if ((err = snd_pcm_oss_set_subdivide1(substream, subdivide)) < 0)
1295 return err;
1296 }
1297 return err;
1298}
1299
1300static int snd_pcm_oss_set_fragment1(snd_pcm_substream_t *substream, unsigned int val)
1301{
1302 snd_pcm_runtime_t *runtime;
1303
1304 if (substream == NULL)
1305 return 0;
1306 runtime = substream->runtime;
1307 if (runtime->oss.subdivision || runtime->oss.fragshift)
1308 return -EINVAL;
1309 runtime->oss.fragshift = val & 0xffff;
1310 runtime->oss.maxfrags = (val >> 16) & 0xffff;
1311 if (runtime->oss.fragshift < 4) /* < 16 */
1312 runtime->oss.fragshift = 4;
1313 if (runtime->oss.maxfrags < 2)
1314 runtime->oss.maxfrags = 2;
1315 runtime->oss.params = 1;
1316 return 0;
1317}
1318
1319static int snd_pcm_oss_set_fragment(snd_pcm_oss_file_t *pcm_oss_file, unsigned int val)
1320{
1321 int err = -EINVAL, idx;
1322
1323 for (idx = 1; idx >= 0; --idx) {
1324 snd_pcm_substream_t *substream = pcm_oss_file->streams[idx];
1325 if (substream == NULL)
1326 continue;
1327 if ((err = snd_pcm_oss_set_fragment1(substream, val)) < 0)
1328 return err;
1329 }
1330 return err;
1331}
1332
1333static int snd_pcm_oss_nonblock(struct file * file)
1334{
1335 file->f_flags |= O_NONBLOCK;
1336 return 0;
1337}
1338
1339static int snd_pcm_oss_get_caps1(snd_pcm_substream_t *substream, int res)
1340{
1341
1342 if (substream == NULL) {
1343 res &= ~DSP_CAP_DUPLEX;
1344 return res;
1345 }
1346#ifdef DSP_CAP_MULTI
1347 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
1348 if (substream->pstr->substream_count > 1)
1349 res |= DSP_CAP_MULTI;
1350#endif
1351 /* DSP_CAP_REALTIME is set all times: */
1352 /* all ALSA drivers can return actual pointer in ring buffer */
1353#if defined(DSP_CAP_REALTIME) && 0
1354 {
1355 snd_pcm_runtime_t *runtime = substream->runtime;
1356 if (runtime->info & (SNDRV_PCM_INFO_BLOCK_TRANSFER|SNDRV_PCM_INFO_BATCH))
1357 res &= ~DSP_CAP_REALTIME;
1358 }
1359#endif
1360 return res;
1361}
1362
1363static int snd_pcm_oss_get_caps(snd_pcm_oss_file_t *pcm_oss_file)
1364{
1365 int result, idx;
1366
1367 result = DSP_CAP_TRIGGER | DSP_CAP_MMAP | DSP_CAP_DUPLEX | DSP_CAP_REALTIME;
1368 for (idx = 0; idx < 2; idx++) {
1369 snd_pcm_substream_t *substream = pcm_oss_file->streams[idx];
1370 result = snd_pcm_oss_get_caps1(substream, result);
1371 }
1372 result |= 0x0001; /* revision - same as SB AWE 64 */
1373 return result;
1374}
1375
1376static void snd_pcm_oss_simulate_fill(snd_pcm_substream_t *substream, snd_pcm_uframes_t hw_ptr)
1377{
1378 snd_pcm_runtime_t *runtime = substream->runtime;
1379 snd_pcm_uframes_t appl_ptr;
1380 appl_ptr = hw_ptr + runtime->buffer_size;
1381 appl_ptr %= runtime->boundary;
1382 runtime->control->appl_ptr = appl_ptr;
1383}
1384
1385static int snd_pcm_oss_set_trigger(snd_pcm_oss_file_t *pcm_oss_file, int trigger)
1386{
1387 snd_pcm_runtime_t *runtime;
1388 snd_pcm_substream_t *psubstream = NULL, *csubstream = NULL;
1389 int err, cmd;
1390
1391#ifdef OSS_DEBUG
1392 printk("pcm_oss: trigger = 0x%x\n", trigger);
1393#endif
1394
1395 psubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
1396 csubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
1397
1398 if (psubstream) {
1399 if ((err = snd_pcm_oss_make_ready(psubstream)) < 0)
1400 return err;
1401 }
1402 if (csubstream) {
1403 if ((err = snd_pcm_oss_make_ready(csubstream)) < 0)
1404 return err;
1405 }
1406 if (psubstream) {
1407 runtime = psubstream->runtime;
1408 if (trigger & PCM_ENABLE_OUTPUT) {
1409 if (runtime->oss.trigger)
1410 goto _skip1;
1411 if (atomic_read(&psubstream->runtime->mmap_count))
1412 snd_pcm_oss_simulate_fill(psubstream, runtime->hw_ptr_interrupt);
1413 runtime->oss.trigger = 1;
1414 runtime->start_threshold = 1;
1415 cmd = SNDRV_PCM_IOCTL_START;
1416 } else {
1417 if (!runtime->oss.trigger)
1418 goto _skip1;
1419 runtime->oss.trigger = 0;
1420 runtime->start_threshold = runtime->boundary;
1421 cmd = SNDRV_PCM_IOCTL_DROP;
1422 runtime->oss.prepare = 1;
1423 }
1424 err = snd_pcm_kernel_playback_ioctl(psubstream, cmd, NULL);
1425 if (err < 0)
1426 return err;
1427 }
1428 _skip1:
1429 if (csubstream) {
1430 runtime = csubstream->runtime;
1431 if (trigger & PCM_ENABLE_INPUT) {
1432 if (runtime->oss.trigger)
1433 goto _skip2;
1434 runtime->oss.trigger = 1;
1435 runtime->start_threshold = 1;
1436 cmd = SNDRV_PCM_IOCTL_START;
1437 } else {
1438 if (!runtime->oss.trigger)
1439 goto _skip2;
1440 runtime->oss.trigger = 0;
1441 runtime->start_threshold = runtime->boundary;
1442 cmd = SNDRV_PCM_IOCTL_DROP;
1443 runtime->oss.prepare = 1;
1444 }
1445 err = snd_pcm_kernel_capture_ioctl(csubstream, cmd, NULL);
1446 if (err < 0)
1447 return err;
1448 }
1449 _skip2:
1450 return 0;
1451}
1452
1453static int snd_pcm_oss_get_trigger(snd_pcm_oss_file_t *pcm_oss_file)
1454{
1455 snd_pcm_substream_t *psubstream = NULL, *csubstream = NULL;
1456 int result = 0;
1457
1458 psubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
1459 csubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
1460 if (psubstream && psubstream->runtime && psubstream->runtime->oss.trigger)
1461 result |= PCM_ENABLE_OUTPUT;
1462 if (csubstream && csubstream->runtime && csubstream->runtime->oss.trigger)
1463 result |= PCM_ENABLE_INPUT;
1464 return result;
1465}
1466
1467static int snd_pcm_oss_get_odelay(snd_pcm_oss_file_t *pcm_oss_file)
1468{
1469 snd_pcm_substream_t *substream;
1470 snd_pcm_runtime_t *runtime;
1471 snd_pcm_sframes_t delay;
1472 int err;
1473
1474 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
1475 if (substream == NULL)
1476 return -EINVAL;
1477 if ((err = snd_pcm_oss_make_ready(substream)) < 0)
1478 return err;
1479 runtime = substream->runtime;
1480 if (runtime->oss.params || runtime->oss.prepare)
1481 return 0;
1482 err = snd_pcm_kernel_playback_ioctl(substream, SNDRV_PCM_IOCTL_DELAY, &delay);
1483 if (err == -EPIPE)
1484 delay = 0; /* hack for broken OSS applications */
1485 else if (err < 0)
1486 return err;
1487 return snd_pcm_oss_bytes(substream, delay);
1488}
1489
1490static int snd_pcm_oss_get_ptr(snd_pcm_oss_file_t *pcm_oss_file, int stream, struct count_info __user * _info)
1491{
1492 snd_pcm_substream_t *substream;
1493 snd_pcm_runtime_t *runtime;
1494 snd_pcm_sframes_t delay;
1495 int fixup;
1496 struct count_info info;
1497 int err;
1498
1499 if (_info == NULL)
1500 return -EFAULT;
1501 substream = pcm_oss_file->streams[stream];
1502 if (substream == NULL)
1503 return -EINVAL;
1504 if ((err = snd_pcm_oss_make_ready(substream)) < 0)
1505 return err;
1506 runtime = substream->runtime;
1507 if (runtime->oss.params || runtime->oss.prepare) {
1508 memset(&info, 0, sizeof(info));
1509 if (copy_to_user(_info, &info, sizeof(info)))
1510 return -EFAULT;
1511 return 0;
1512 }
1513 if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
1514 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DELAY, &delay);
1515 if (err == -EPIPE || err == -ESTRPIPE || (! err && delay < 0)) {
1516 err = 0;
1517 delay = 0;
1518 fixup = 0;
1519 } else {
1520 fixup = runtime->oss.buffer_used;
1521 }
1522 } else {
1523 err = snd_pcm_oss_capture_position_fixup(substream, &delay);
1524 fixup = -runtime->oss.buffer_used;
1525 }
1526 if (err < 0)
1527 return err;
1528 info.ptr = snd_pcm_oss_bytes(substream, runtime->status->hw_ptr % runtime->buffer_size);
1529 if (atomic_read(&runtime->mmap_count)) {
1530 snd_pcm_sframes_t n;
1531 n = (delay = runtime->hw_ptr_interrupt) - runtime->oss.prev_hw_ptr_interrupt;
1532 if (n < 0)
1533 n += runtime->boundary;
1534 info.blocks = n / runtime->period_size;
1535 runtime->oss.prev_hw_ptr_interrupt = delay;
1536 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
1537 snd_pcm_oss_simulate_fill(substream, delay);
1538 info.bytes = snd_pcm_oss_bytes(substream, runtime->status->hw_ptr) & INT_MAX;
1539 } else {
5ac0fab9 1540 delay = snd_pcm_oss_bytes(substream, delay);
fb4bd0ad 1541 if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
5ac0fab9 1542 info.blocks = (runtime->oss.buffer_bytes - delay - fixup) / runtime->oss.period_bytes;
1da177e4 1543 info.bytes = (runtime->oss.bytes - delay) & INT_MAX;
fb4bd0ad 1544 } else {
5ac0fab9
JK		 1545 delay += fixup;
1546 info.blocks = delay / runtime->oss.period_bytes;
1da177e4 1547 info.bytes = (runtime->oss.bytes + delay) & INT_MAX;
fb4bd0ad 1548 }
1da177e4
LT		 1549 }
1550 if (copy_to_user(_info, &info, sizeof(info)))
1551 return -EFAULT;
1552 return 0;
1553}
1554
1555static int snd_pcm_oss_get_space(snd_pcm_oss_file_t *pcm_oss_file, int stream, struct audio_buf_info __user *_info)
1556{
1557 snd_pcm_substream_t *substream;
1558 snd_pcm_runtime_t *runtime;
1559 snd_pcm_sframes_t avail;
1560 int fixup;
1561 struct audio_buf_info info;
1562 int err;
1563
1564 if (_info == NULL)
1565 return -EFAULT;
1566 substream = pcm_oss_file->streams[stream];
1567 if (substream == NULL)
1568 return -EINVAL;
1569 runtime = substream->runtime;
1570
1571 if (runtime->oss.params &&
1572 (err = snd_pcm_oss_change_params(substream)) < 0)
1573 return err;
1574
1575 info.fragsize = runtime->oss.period_bytes;
1576 info.fragstotal = runtime->periods;
1577 if (runtime->oss.prepare) {
1578 if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
1579 info.bytes = runtime->oss.period_bytes * runtime->oss.periods;
1580 info.fragments = runtime->oss.periods;
1581 } else {
1582 info.bytes = 0;
1583 info.fragments = 0;
1584 }
1585 } else {
1586 if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
1587 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DELAY, &avail);
1588 if (err == -EPIPE || err == -ESTRPIPE || (! err && avail < 0)) {
1589 avail = runtime->buffer_size;
1590 err = 0;
1591 fixup = 0;
1592 } else {
1593 avail = runtime->buffer_size - avail;
1594 fixup = -runtime->oss.buffer_used;
1595 }
1596 } else {
1597 err = snd_pcm_oss_capture_position_fixup(substream, &avail);
1598 fixup = runtime->oss.buffer_used;
1599 }
1600 if (err < 0)
1601 return err;
1602 info.bytes = snd_pcm_oss_bytes(substream, avail) + fixup;
1603 info.fragments = info.bytes / runtime->oss.period_bytes;
1604 }
1605
1606#ifdef OSS_DEBUG
1607 printk("pcm_oss: space: bytes = %i, fragments = %i, fragstotal = %i, fragsize = %i\n", info.bytes, info.fragments, info.fragstotal, info.fragsize);
1608#endif
1609 if (copy_to_user(_info, &info, sizeof(info)))
1610 return -EFAULT;
1611 return 0;
1612}
1613
1614static int snd_pcm_oss_get_mapbuf(snd_pcm_oss_file_t *pcm_oss_file, int stream, struct buffmem_desc __user * _info)
1615{
1616 // it won't be probably implemented
1617 // snd_printd("TODO: snd_pcm_oss_get_mapbuf\n");
1618 return -EINVAL;
1619}
1620
1621static snd_pcm_oss_setup_t *snd_pcm_oss_look_for_setup(snd_pcm_t *pcm, int stream, const char *task_name)
1622{
1623 const char *ptr, *ptrl;
1624 snd_pcm_oss_setup_t *setup;
1625
1626 down(&pcm->streams[stream].oss.setup_mutex);
1627 for (setup = pcm->streams[stream].oss.setup_list; setup; setup = setup->next) {
1628 if (!strcmp(setup->task_name, task_name)) {
1629 up(&pcm->streams[stream].oss.setup_mutex);
1630 return setup;
1631 }
1632 }
1633 ptr = ptrl = task_name;
1634 while (*ptr) {
1635 if (*ptr == '/')
1636 ptrl = ptr + 1;
1637 ptr++;
1638 }
1639 if (ptrl == task_name) {
1640 goto __not_found;
1641 return NULL;
1642 }
1643 for (setup = pcm->streams[stream].oss.setup_list; setup; setup = setup->next) {
1644 if (!strcmp(setup->task_name, ptrl)) {
1645 up(&pcm->streams[stream].oss.setup_mutex);
1646 return setup;
1647 }
1648 }
1649 __not_found:
1650 up(&pcm->streams[stream].oss.setup_mutex);
1651 return NULL;
1652}
1653
1654static void snd_pcm_oss_init_substream(snd_pcm_substream_t *substream,
1655 snd_pcm_oss_setup_t *setup,
1656 int minor)
1657{
1658 snd_pcm_runtime_t *runtime;
1659
1660 substream->oss.oss = 1;
1661 substream->oss.setup = setup;
1662 runtime = substream->runtime;
1663 runtime->oss.params = 1;
1664 runtime->oss.trigger = 1;
1665 runtime->oss.rate = 8000;
1666 switch (SNDRV_MINOR_OSS_DEVICE(minor)) {
1667 case SNDRV_MINOR_OSS_PCM_8:
1668 runtime->oss.format = AFMT_U8;
1669 break;
1670 case SNDRV_MINOR_OSS_PCM_16:
1671 runtime->oss.format = AFMT_S16_LE;
1672 break;
1673 default:
1674 runtime->oss.format = AFMT_MU_LAW;
1675 }
1676 runtime->oss.channels = 1;
1677 runtime->oss.fragshift = 0;
1678 runtime->oss.maxfrags = 0;
1679 runtime->oss.subdivision = 0;
1680}
1681
1682static void snd_pcm_oss_release_substream(snd_pcm_substream_t *substream)
1683{
1684 snd_pcm_runtime_t *runtime;
1685 runtime = substream->runtime;
1686 vfree(runtime->oss.buffer);
1687 snd_pcm_oss_plugin_clear(substream);
1688 substream->oss.file = NULL;
1689 substream->oss.oss = 0;
1690}
1691
1692static int snd_pcm_oss_release_file(snd_pcm_oss_file_t *pcm_oss_file)
1693{
1694 int cidx;
1695 snd_assert(pcm_oss_file != NULL, return -ENXIO);
1696 for (cidx = 0; cidx < 2; ++cidx) {
1697 snd_pcm_substream_t *substream = pcm_oss_file->streams[cidx];
1698 snd_pcm_runtime_t *runtime;
1699 if (substream == NULL)
1700 continue;
1701 runtime = substream->runtime;
1702
1703 snd_pcm_stream_lock_irq(substream);
1704 if (snd_pcm_running(substream))
1705 snd_pcm_stop(substream, SNDRV_PCM_STATE_SETUP);
1706 snd_pcm_stream_unlock_irq(substream);
1707 if (substream->open_flag) {
1708 if (substream->ops->hw_free != NULL)
1709 substream->ops->hw_free(substream);
1710 substream->ops->close(substream);
1711 substream->open_flag = 0;
1712 }
1713 substream->ffile = NULL;
1714 snd_pcm_oss_release_substream(substream);
1715 snd_pcm_release_substream(substream);
1716 }
1717 kfree(pcm_oss_file);
1718 return 0;
1719}
1720
1721static int snd_pcm_oss_open_file(struct file *file,
1722 snd_pcm_t *pcm,
1723 snd_pcm_oss_file_t **rpcm_oss_file,
1724 int minor,
1725 snd_pcm_oss_setup_t *psetup,
1726 snd_pcm_oss_setup_t *csetup)
1727{
1728 int err = 0;
1729 snd_pcm_oss_file_t *pcm_oss_file;
1730 snd_pcm_substream_t *psubstream = NULL, *csubstream = NULL;
1731 unsigned int f_mode = file->f_mode;
1732
1733 snd_assert(rpcm_oss_file != NULL, return -EINVAL);
1734 *rpcm_oss_file = NULL;
1735
1736 pcm_oss_file = kcalloc(1, sizeof(*pcm_oss_file), GFP_KERNEL);
1737 if (pcm_oss_file == NULL)
1738 return -ENOMEM;
1739
1740 if ((f_mode & (FMODE_WRITE|FMODE_READ)) == (FMODE_WRITE|FMODE_READ) &&
1741 (pcm->info_flags & SNDRV_PCM_INFO_HALF_DUPLEX))
1742 f_mode = FMODE_WRITE;
1743 if ((f_mode & FMODE_WRITE) && !(psetup && psetup->disable)) {
1744 if ((err = snd_pcm_open_substream(pcm, SNDRV_PCM_STREAM_PLAYBACK,
1745 &psubstream)) < 0) {
1746 snd_pcm_oss_release_file(pcm_oss_file);
1747 return err;
1748 }
1749 pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK] = psubstream;
1750 }
1751 if ((f_mode & FMODE_READ) && !(csetup && csetup->disable)) {
1752 if ((err = snd_pcm_open_substream(pcm, SNDRV_PCM_STREAM_CAPTURE,
1753 &csubstream)) < 0) {
1754 if (!(f_mode & FMODE_WRITE) || err != -ENODEV) {
1755 snd_pcm_oss_release_file(pcm_oss_file);
1756 return err;
1757 } else {
1758 csubstream = NULL;
1759 }
1760 }
1761 pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE] = csubstream;
1762 }
1763
1764 if (psubstream == NULL && csubstream == NULL) {
1765 snd_pcm_oss_release_file(pcm_oss_file);
1766 return -EINVAL;
1767 }
1768 if (psubstream != NULL) {
1769 psubstream->oss.file = pcm_oss_file;
1770 err = snd_pcm_hw_constraints_init(psubstream);
1771 if (err < 0) {
1772 snd_printd("snd_pcm_hw_constraint_init failed\n");
1773 snd_pcm_oss_release_file(pcm_oss_file);
1774 return err;
1775 }
1776 if ((err = psubstream->ops->open(psubstream)) < 0) {
1777 snd_pcm_oss_release_file(pcm_oss_file);
1778 return err;
1779 }
1780 psubstream->open_flag = 1;
1781 err = snd_pcm_hw_constraints_complete(psubstream);
1782 if (err < 0) {
1783 snd_printd("snd_pcm_hw_constraint_complete failed\n");
1784 snd_pcm_oss_release_file(pcm_oss_file);
1785 return err;
1786 }
1787 psubstream->ffile = file;
1788 snd_pcm_oss_init_substream(psubstream, psetup, minor);
1789 }
1790 if (csubstream != NULL) {
1791 csubstream->oss.file = pcm_oss_file;
1792 err = snd_pcm_hw_constraints_init(csubstream);
1793 if (err < 0) {
1794 snd_printd("snd_pcm_hw_constraint_init failed\n");
1795 snd_pcm_oss_release_file(pcm_oss_file);
1796 return err;
1797 }
1798 if ((err = csubstream->ops->open(csubstream)) < 0) {
1799 snd_pcm_oss_release_file(pcm_oss_file);
1800 return err;
1801 }
1802 csubstream->open_flag = 1;
1803 err = snd_pcm_hw_constraints_complete(csubstream);
1804 if (err < 0) {
1805 snd_printd("snd_pcm_hw_constraint_complete failed\n");
1806 snd_pcm_oss_release_file(pcm_oss_file);
1807 return err;
1808 }
1809 csubstream->ffile = file;
1810 snd_pcm_oss_init_substream(csubstream, csetup, minor);
1811 }
1812
1813 file->private_data = pcm_oss_file;
1814 *rpcm_oss_file = pcm_oss_file;
1815 return 0;
1816}
1817
1818
1819static int snd_pcm_oss_open(struct inode *inode, struct file *file)
1820{
1821 int minor = iminor(inode);
1822 int cardnum = SNDRV_MINOR_OSS_CARD(minor);
1823 int device;
1824 int err;
1825 char task_name[32];
1826 snd_pcm_t *pcm;
1827 snd_pcm_oss_file_t *pcm_oss_file;
1828 snd_pcm_oss_setup_t *psetup = NULL, *csetup = NULL;
1829 int nonblock;
1830 wait_queue_t wait;
1831
1832 snd_assert(cardnum >= 0 && cardnum < SNDRV_CARDS, return -ENXIO);
1833 device = SNDRV_MINOR_OSS_DEVICE(minor) == SNDRV_MINOR_OSS_PCM1 ?
1834 adsp_map[cardnum] : dsp_map[cardnum];
1835
1836 pcm = snd_pcm_devices[(cardnum * SNDRV_PCM_DEVICES) + device];
1837 if (pcm == NULL) {
1838 err = -ENODEV;
1839 goto __error1;
1840 }
1841 err = snd_card_file_add(pcm->card, file);
1842 if (err < 0)
1843 goto __error1;
1844 if (!try_module_get(pcm->card->module)) {
1845 err = -EFAULT;
1846 goto __error2;
1847 }
1848 if (snd_task_name(current, task_name, sizeof(task_name)) < 0) {
1849 err = -EFAULT;
1850 goto __error;
1851 }
1852 if (file->f_mode & FMODE_WRITE)
1853 psetup = snd_pcm_oss_look_for_setup(pcm, SNDRV_PCM_STREAM_PLAYBACK, task_name);
1854 if (file->f_mode & FMODE_READ)
1855 csetup = snd_pcm_oss_look_for_setup(pcm, SNDRV_PCM_STREAM_CAPTURE, task_name);
1856
1857 nonblock = !!(file->f_flags & O_NONBLOCK);
1858 if (psetup && !psetup->disable) {
1859 if (psetup->nonblock)
1860 nonblock = 1;
1861 else if (psetup->block)
1862 nonblock = 0;
1863 } else if (csetup && !csetup->disable) {
1864 if (csetup->nonblock)
1865 nonblock = 1;
1866 else if (csetup->block)
1867 nonblock = 0;
1868 }
1869 if (!nonblock)
1870 nonblock = nonblock_open;
1871
1872 init_waitqueue_entry(&wait, current);
1873 add_wait_queue(&pcm->open_wait, &wait);
1874 down(&pcm->open_mutex);
1875 while (1) {
1876 err = snd_pcm_oss_open_file(file, pcm, &pcm_oss_file,
1877 minor, psetup, csetup);
1878 if (err >= 0)
1879 break;
1880 if (err == -EAGAIN) {
1881 if (nonblock) {
1882 err = -EBUSY;
1883 break;
1884 }
1885 } else
1886 break;
1887 set_current_state(TASK_INTERRUPTIBLE);
1888 up(&pcm->open_mutex);
1889 schedule();
1890 down(&pcm->open_mutex);
1891 if (signal_pending(current)) {
1892 err = -ERESTARTSYS;
1893 break;
1894 }
1895 }
1896 remove_wait_queue(&pcm->open_wait, &wait);
1897 up(&pcm->open_mutex);
1898 if (err < 0)
1899 goto __error;
1900 return err;
1901
1902 __error:
1903 module_put(pcm->card->module);
1904 __error2:
1905 snd_card_file_remove(pcm->card, file);
1906 __error1:
1907 return err;
1908}
1909
1910static int snd_pcm_oss_release(struct inode *inode, struct file *file)
1911{
1912 snd_pcm_t *pcm;
1913 snd_pcm_substream_t *substream;
1914 snd_pcm_oss_file_t *pcm_oss_file;
1915
1916 pcm_oss_file = file->private_data;
1917 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
1918 if (substream == NULL)
1919 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
1920 snd_assert(substream != NULL, return -ENXIO);
1921 pcm = substream->pcm;
1922 snd_pcm_oss_sync(pcm_oss_file);
1923 down(&pcm->open_mutex);
1924 snd_pcm_oss_release_file(pcm_oss_file);
1925 up(&pcm->open_mutex);
1926 wake_up(&pcm->open_wait);
1927 module_put(pcm->card->module);
1928 snd_card_file_remove(pcm->card, file);
1929 return 0;
1930}
1931
1932static long snd_pcm_oss_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
1933{
1934 snd_pcm_oss_file_t *pcm_oss_file;
1935 int __user *p = (int __user *)arg;
1936 int res;
1937
1938 pcm_oss_file = file->private_data;
1939 if (cmd == OSS_GETVERSION)
1940 return put_user(SNDRV_OSS_VERSION, p);
1941 if (cmd == OSS_ALSAEMULVER)
1942 return put_user(1, p);
1943#if defined(CONFIG_SND_MIXER_OSS) || (defined(MODULE) && defined(CONFIG_SND_MIXER_OSS_MODULE))
1944 if (((cmd >> 8) & 0xff) == 'M') { /* mixer ioctl - for OSS compatibility */
1945 snd_pcm_substream_t *substream;
1946 int idx;
1947 for (idx = 0; idx < 2; ++idx) {
1948 substream = pcm_oss_file->streams[idx];
1949 if (substream != NULL)
1950 break;
1951 }
1952 snd_assert(substream != NULL, return -ENXIO);
1953 return snd_mixer_oss_ioctl_card(substream->pcm->card, cmd, arg);
1954 }
1955#endif
1956 if (((cmd >> 8) & 0xff) != 'P')
1957 return -EINVAL;
1958#ifdef OSS_DEBUG
1959 printk("pcm_oss: ioctl = 0x%x\n", cmd);
1960#endif
1961 switch (cmd) {
1962 case SNDCTL_DSP_RESET:
1963 return snd_pcm_oss_reset(pcm_oss_file);
1964 case SNDCTL_DSP_SYNC:
1965 return snd_pcm_oss_sync(pcm_oss_file);
1966 case SNDCTL_DSP_SPEED:
1967 if (get_user(res, p))
1968 return -EFAULT;
1969 if ((res = snd_pcm_oss_set_rate(pcm_oss_file, res))<0)
1970 return res;
1971 return put_user(res, p);
1972 case SOUND_PCM_READ_RATE:
1973 res = snd_pcm_oss_get_rate(pcm_oss_file);
1974 if (res < 0)
1975 return res;
1976 return put_user(res, p);
1977 case SNDCTL_DSP_STEREO:
1978 if (get_user(res, p))
1979 return -EFAULT;
1980 res = res > 0 ? 2 : 1;
1981 if ((res = snd_pcm_oss_set_channels(pcm_oss_file, res)) < 0)
1982 return res;
1983 return put_user(--res, p);
1984 case SNDCTL_DSP_GETBLKSIZE:
1985 res = snd_pcm_oss_get_block_size(pcm_oss_file);
1986 if (res < 0)
1987 return res;
1988 return put_user(res, p);
1989 case SNDCTL_DSP_SETFMT:
1990 if (get_user(res, p))
1991 return -EFAULT;
1992 res = snd_pcm_oss_set_format(pcm_oss_file, res);
1993 if (res < 0)
1994 return res;
1995 return put_user(res, p);
1996 case SOUND_PCM_READ_BITS:
1997 res = snd_pcm_oss_get_format(pcm_oss_file);
1998 if (res < 0)
1999 return res;
2000 return put_user(res, p);
2001 case SNDCTL_DSP_CHANNELS:
2002 if (get_user(res, p))
2003 return -EFAULT;
2004 res = snd_pcm_oss_set_channels(pcm_oss_file, res);
2005 if (res < 0)
2006 return res;
2007 return put_user(res, p);
2008 case SOUND_PCM_READ_CHANNELS:
2009 res = snd_pcm_oss_get_channels(pcm_oss_file);
2010 if (res < 0)
2011 return res;
2012 return put_user(res, p);
2013 case SOUND_PCM_WRITE_FILTER:
2014 case SOUND_PCM_READ_FILTER:
2015 return -EIO;
2016 case SNDCTL_DSP_POST:
2017 return snd_pcm_oss_post(pcm_oss_file);
2018 case SNDCTL_DSP_SUBDIVIDE:
2019 if (get_user(res, p))
2020 return -EFAULT;
2021 res = snd_pcm_oss_set_subdivide(pcm_oss_file, res);
2022 if (res < 0)
2023 return res;
2024 return put_user(res, p);
2025 case SNDCTL_DSP_SETFRAGMENT:
2026 if (get_user(res, p))
2027 return -EFAULT;
2028 return snd_pcm_oss_set_fragment(pcm_oss_file, res);
2029 case SNDCTL_DSP_GETFMTS:
2030 res = snd_pcm_oss_get_formats(pcm_oss_file);
2031 if (res < 0)
2032 return res;
2033 return put_user(res, p);
2034 case SNDCTL_DSP_GETOSPACE:
2035 case SNDCTL_DSP_GETISPACE:
2036 return snd_pcm_oss_get_space(pcm_oss_file,
2037 cmd == SNDCTL_DSP_GETISPACE ?
2038 SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK,
2039 (struct audio_buf_info __user *) arg);
2040 case SNDCTL_DSP_NONBLOCK:
2041 return snd_pcm_oss_nonblock(file);
2042 case SNDCTL_DSP_GETCAPS:
2043 res = snd_pcm_oss_get_caps(pcm_oss_file);
2044 if (res < 0)
2045 return res;
2046 return put_user(res, p);
2047 case SNDCTL_DSP_GETTRIGGER:
2048 res = snd_pcm_oss_get_trigger(pcm_oss_file);
2049 if (res < 0)
2050 return res;
2051 return put_user(res, p);
2052 case SNDCTL_DSP_SETTRIGGER:
2053 if (get_user(res, p))
2054 return -EFAULT;
2055 return snd_pcm_oss_set_trigger(pcm_oss_file, res);
2056 case SNDCTL_DSP_GETIPTR:
2057 case SNDCTL_DSP_GETOPTR:
2058 return snd_pcm_oss_get_ptr(pcm_oss_file,
2059 cmd == SNDCTL_DSP_GETIPTR ?
2060 SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK,
2061 (struct count_info __user *) arg);
2062 case SNDCTL_DSP_MAPINBUF:
2063 case SNDCTL_DSP_MAPOUTBUF:
2064 return snd_pcm_oss_get_mapbuf(pcm_oss_file,
2065 cmd == SNDCTL_DSP_MAPINBUF ?
2066 SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK,
2067 (struct buffmem_desc __user *) arg);
2068 case SNDCTL_DSP_SETSYNCRO:
2069 /* stop DMA now.. */
2070 return 0;
2071 case SNDCTL_DSP_SETDUPLEX:
2072 if (snd_pcm_oss_get_caps(pcm_oss_file) & DSP_CAP_DUPLEX)
2073 return 0;
2074 return -EIO;
2075 case SNDCTL_DSP_GETODELAY:
2076 res = snd_pcm_oss_get_odelay(pcm_oss_file);
2077 if (res < 0) {
2078 /* it's for sure, some broken apps don't check for error codes */
2079 put_user(0, p);
2080 return res;
2081 }
2082 return put_user(res, p);
2083 case SNDCTL_DSP_PROFILE:
2084 return 0; /* silently ignore */
2085 default:
2086 snd_printd("pcm_oss: unknown command = 0x%x\n", cmd);
2087 }
2088 return -EINVAL;
2089}
2090
2091#ifdef CONFIG_COMPAT
2092/* all compatible */
2093#define snd_pcm_oss_ioctl_compat snd_pcm_oss_ioctl
2094#else
2095#define snd_pcm_oss_ioctl_compat NULL
2096#endif
2097
2098static ssize_t snd_pcm_oss_read(struct file *file, char __user *buf, size_t count, loff_t *offset)
2099{
2100 snd_pcm_oss_file_t *pcm_oss_file;
2101 snd_pcm_substream_t *substream;
2102
2103 pcm_oss_file = file->private_data;
2104 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
2105 if (substream == NULL)
2106 return -ENXIO;
2107#ifndef OSS_DEBUG
2108 return snd_pcm_oss_read1(substream, buf, count);
2109#else
2110 {
2111 ssize_t res = snd_pcm_oss_read1(substream, buf, count);
2112 printk("pcm_oss: read %li bytes (returned %li bytes)\n", (long)count, (long)res);
2113 return res;
2114 }
2115#endif
2116}
2117
2118static ssize_t snd_pcm_oss_write(struct file *file, const char __user *buf, size_t count, loff_t *offset)
2119{
2120 snd_pcm_oss_file_t *pcm_oss_file;
2121 snd_pcm_substream_t *substream;
2122 long result;
2123
2124 pcm_oss_file = file->private_data;
2125 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
2126 if (substream == NULL)
2127 return -ENXIO;
2128 up(&file->f_dentry->d_inode->i_sem);
2129 result = snd_pcm_oss_write1(substream, buf, count);
2130 down(&file->f_dentry->d_inode->i_sem);
2131#ifdef OSS_DEBUG
2132 printk("pcm_oss: write %li bytes (wrote %li bytes)\n", (long)count, (long)result);
2133#endif
2134 return result;
2135}
2136
2137static int snd_pcm_oss_playback_ready(snd_pcm_substream_t *substream)
2138{
2139 snd_pcm_runtime_t *runtime = substream->runtime;
2140 if (atomic_read(&runtime->mmap_count))
2141 return runtime->oss.prev_hw_ptr_interrupt != runtime->hw_ptr_interrupt;
2142 else
2143 return snd_pcm_playback_avail(runtime) >= runtime->oss.period_frames;
2144}
2145
2146static int snd_pcm_oss_capture_ready(snd_pcm_substream_t *substream)
2147{
2148 snd_pcm_runtime_t *runtime = substream->runtime;
2149 if (atomic_read(&runtime->mmap_count))
2150 return runtime->oss.prev_hw_ptr_interrupt != runtime->hw_ptr_interrupt;
2151 else
2152 return snd_pcm_capture_avail(runtime) >= runtime->oss.period_frames;
2153}
2154
2155static unsigned int snd_pcm_oss_poll(struct file *file, poll_table * wait)
2156{
2157 snd_pcm_oss_file_t *pcm_oss_file;
2158 unsigned int mask;
2159 snd_pcm_substream_t *psubstream = NULL, *csubstream = NULL;
2160
2161 pcm_oss_file = file->private_data;
2162
2163 psubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
2164 csubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
2165
2166 mask = 0;
2167 if (psubstream != NULL) {
2168 snd_pcm_runtime_t *runtime = psubstream->runtime;
2169 poll_wait(file, &runtime->sleep, wait);
2170 snd_pcm_stream_lock_irq(psubstream);
2171 if (runtime->status->state != SNDRV_PCM_STATE_DRAINING &&
2172 (runtime->status->state != SNDRV_PCM_STATE_RUNNING ||
2173 snd_pcm_oss_playback_ready(psubstream)))
2174 mask |= POLLOUT | POLLWRNORM;
2175 snd_pcm_stream_unlock_irq(psubstream);
2176 }
2177 if (csubstream != NULL) {
2178 snd_pcm_runtime_t *runtime = csubstream->runtime;
2179 enum sndrv_pcm_state ostate;
2180 poll_wait(file, &runtime->sleep, wait);
2181 snd_pcm_stream_lock_irq(csubstream);
2182 if ((ostate = runtime->status->state) != SNDRV_PCM_STATE_RUNNING ||
2183 snd_pcm_oss_capture_ready(csubstream))
2184 mask |= POLLIN | POLLRDNORM;
2185 snd_pcm_stream_unlock_irq(csubstream);
2186 if (ostate != SNDRV_PCM_STATE_RUNNING && runtime->oss.trigger) {
2187 snd_pcm_oss_file_t ofile;
2188 memset(&ofile, 0, sizeof(ofile));
2189 ofile.streams[SNDRV_PCM_STREAM_CAPTURE] = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
2190 runtime->oss.trigger = 0;
2191 snd_pcm_oss_set_trigger(&ofile, PCM_ENABLE_INPUT);
2192 }
2193 }
2194
2195 return mask;
2196}
2197
2198static int snd_pcm_oss_mmap(struct file *file, struct vm_area_struct *area)
2199{
2200 snd_pcm_oss_file_t *pcm_oss_file;
2201 snd_pcm_substream_t *substream = NULL;
2202 snd_pcm_runtime_t *runtime;
2203 int err;
2204
2205#ifdef OSS_DEBUG
2206 printk("pcm_oss: mmap begin\n");
2207#endif
2208 pcm_oss_file = file->private_data;
2209 switch ((area->vm_flags & (VM_READ | VM_WRITE))) {
2210 case VM_READ | VM_WRITE:
2211 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
2212 if (substream)
2213 break;
2214 /* Fall through */
2215 case VM_READ:
2216 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
2217 break;
2218 case VM_WRITE:
2219 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
2220 break;
2221 default:
2222 return -EINVAL;
2223 }
2224 /* set VM_READ access as well to fix memset() routines that do
2225 reads before writes (to improve performance) */
2226 area->vm_flags |= VM_READ;
2227 if (substream == NULL)
2228 return -ENXIO;
2229 runtime = substream->runtime;
2230 if (!(runtime->info & SNDRV_PCM_INFO_MMAP_VALID))
2231 return -EIO;
2232 if (runtime->info & SNDRV_PCM_INFO_INTERLEAVED)
2233 runtime->access = SNDRV_PCM_ACCESS_MMAP_INTERLEAVED;
2234 else
2235 return -EIO;
2236
2237 if (runtime->oss.params) {
2238 if ((err = snd_pcm_oss_change_params(substream)) < 0)
2239 return err;
2240 }
2241 if (runtime->oss.plugin_first != NULL)
2242 return -EIO;
2243
2244 if (area->vm_pgoff != 0)
2245 return -EINVAL;
2246
2247 err = snd_pcm_mmap_data(substream, file, area);
2248 if (err < 0)
2249 return err;
2250 runtime->oss.mmap_bytes = area->vm_end - area->vm_start;
2251 runtime->silence_threshold = 0;
2252 runtime->silence_size = 0;
2253#ifdef OSS_DEBUG
2254 printk("pcm_oss: mmap ok, bytes = 0x%x\n", runtime->oss.mmap_bytes);
2255#endif
2256 /* In mmap mode we never stop */
2257 runtime->stop_threshold = runtime->boundary;
2258
2259 return 0;
2260}
2261
2262/*
2263 * /proc interface
2264 */
2265
2266static void snd_pcm_oss_proc_read(snd_info_entry_t *entry,
2267 snd_info_buffer_t * buffer)
2268{
2269 snd_pcm_str_t *pstr = (snd_pcm_str_t *)entry->private_data;
2270 snd_pcm_oss_setup_t *setup = pstr->oss.setup_list;
2271 down(&pstr->oss.setup_mutex);
2272 while (setup) {
2273 snd_iprintf(buffer, "%s %u %u%s%s%s%s%s%s\n",
2274 setup->task_name,
2275 setup->periods,
2276 setup->period_size,
2277 setup->disable ? " disable" : "",
2278 setup->direct ? " direct" : "",
2279 setup->block ? " block" : "",
2280 setup->nonblock ? " non-block" : "",
2281 setup->partialfrag ? " partial-frag" : "",
2282 setup->nosilence ? " no-silence" : "");
2283 setup = setup->next;
2284 }
2285 up(&pstr->oss.setup_mutex);
2286}
2287
2288static void snd_pcm_oss_proc_free_setup_list(snd_pcm_str_t * pstr)
2289{
2290 unsigned int idx;
2291 snd_pcm_substream_t *substream;
2292 snd_pcm_oss_setup_t *setup, *setupn;
2293
2294 for (idx = 0, substream = pstr->substream;
2295 idx < pstr->substream_count; idx++, substream = substream->next)
2296 substream->oss.setup = NULL;
2297 for (setup = pstr->oss.setup_list, pstr->oss.setup_list = NULL;
2298 setup; setup = setupn) {
2299 setupn = setup->next;
2300 kfree(setup->task_name);
2301 kfree(setup);
2302 }
2303 pstr->oss.setup_list = NULL;
2304}
2305
2306static void snd_pcm_oss_proc_write(snd_info_entry_t *entry,
2307 snd_info_buffer_t * buffer)
2308{
2309 snd_pcm_str_t *pstr = (snd_pcm_str_t *)entry->private_data;
2310 char line[128], str[32], task_name[32], *ptr;
2311 int idx1;
2312 snd_pcm_oss_setup_t *setup, *setup1, template;
2313
2314 while (!snd_info_get_line(buffer, line, sizeof(line))) {
2315 down(&pstr->oss.setup_mutex);
2316 memset(&template, 0, sizeof(template));
2317 ptr = snd_info_get_str(task_name, line, sizeof(task_name));
2318 if (!strcmp(task_name, "clear") || !strcmp(task_name, "erase")) {
2319 snd_pcm_oss_proc_free_setup_list(pstr);
2320 up(&pstr->oss.setup_mutex);
2321 continue;
2322 }
2323 for (setup = pstr->oss.setup_list; setup; setup = setup->next) {
2324 if (!strcmp(setup->task_name, task_name)) {
2325 template = *setup;
2326 break;
2327 }
2328 }
2329 ptr = snd_info_get_str(str, ptr, sizeof(str));
2330 template.periods = simple_strtoul(str, NULL, 10);
2331 ptr = snd_info_get_str(str, ptr, sizeof(str));
2332 template.period_size = simple_strtoul(str, NULL, 10);
2333 for (idx1 = 31; idx1 >= 0; idx1--)
2334 if (template.period_size & (1 << idx1))
2335 break;
2336 for (idx1--; idx1 >= 0; idx1--)
2337 template.period_size &= ~(1 << idx1);
2338 do {
2339 ptr = snd_info_get_str(str, ptr, sizeof(str));
2340 if (!strcmp(str, "disable")) {
2341 template.disable = 1;
2342 } else if (!strcmp(str, "direct")) {
2343 template.direct = 1;
2344 } else if (!strcmp(str, "block")) {
2345 template.block = 1;
2346 } else if (!strcmp(str, "non-block")) {
2347 template.nonblock = 1;
2348 } else if (!strcmp(str, "partial-frag")) {
2349 template.partialfrag = 1;
2350 } else if (!strcmp(str, "no-silence")) {
2351 template.nosilence = 1;
2352 }
2353 } while (*str);
2354 if (setup == NULL) {
2355 setup = (snd_pcm_oss_setup_t *) kmalloc(sizeof(snd_pcm_oss_setup_t), GFP_KERNEL);
2356 if (setup) {
2357 if (pstr->oss.setup_list == NULL) {
2358 pstr->oss.setup_list = setup;
2359 } else {
2360 for (setup1 = pstr->oss.setup_list; setup1->next; setup1 = setup1->next);
2361 setup1->next = setup;
2362 }
2363 template.task_name = snd_kmalloc_strdup(task_name, GFP_KERNEL);
2364 } else {
2365 buffer->error = -ENOMEM;
2366 }
2367 }
2368 if (setup)
2369 *setup = template;
2370 up(&pstr->oss.setup_mutex);
2371 }
2372}
2373
2374static void snd_pcm_oss_proc_init(snd_pcm_t *pcm)
2375{
2376 int stream;
2377 for (stream = 0; stream < 2; ++stream) {
2378 snd_info_entry_t *entry;
2379 snd_pcm_str_t *pstr = &pcm->streams[stream];
2380 if (pstr->substream_count == 0)
2381 continue;
2382 if ((entry = snd_info_create_card_entry(pcm->card, "oss", pstr->proc_root)) != NULL) {
2383 entry->content = SNDRV_INFO_CONTENT_TEXT;
2384 entry->mode = S_IFREG | S_IRUGO | S_IWUSR;
2385 entry->c.text.read_size = 8192;
2386 entry->c.text.read = snd_pcm_oss_proc_read;
2387 entry->c.text.write_size = 8192;
2388 entry->c.text.write = snd_pcm_oss_proc_write;
2389 entry->private_data = pstr;
2390 if (snd_info_register(entry) < 0) {
2391 snd_info_free_entry(entry);
2392 entry = NULL;
2393 }
2394 }
2395 pstr->oss.proc_entry = entry;
2396 }
2397}
2398
2399static void snd_pcm_oss_proc_done(snd_pcm_t *pcm)
2400{
2401 int stream;
2402 for (stream = 0; stream < 2; ++stream) {
2403 snd_pcm_str_t *pstr = &pcm->streams[stream];
2404 if (pstr->oss.proc_entry) {
2405 snd_info_unregister(pstr->oss.proc_entry);
2406 pstr->oss.proc_entry = NULL;
2407 snd_pcm_oss_proc_free_setup_list(pstr);
2408 }
2409 }
2410}
2411
2412/*
2413 * ENTRY functions
2414 */
2415
2416static struct file_operations snd_pcm_oss_f_reg =
2417{
2418 .owner = THIS_MODULE,
2419 .read = snd_pcm_oss_read,
2420 .write = snd_pcm_oss_write,
2421 .open = snd_pcm_oss_open,
2422 .release = snd_pcm_oss_release,
2423 .poll = snd_pcm_oss_poll,
2424 .unlocked_ioctl = snd_pcm_oss_ioctl,
2425 .compat_ioctl = snd_pcm_oss_ioctl_compat,
2426 .mmap = snd_pcm_oss_mmap,
2427};
2428
2429static snd_minor_t snd_pcm_oss_reg =
2430{
2431 .comment = "digital audio",
2432 .f_ops = &snd_pcm_oss_f_reg,
2433};
2434
2435static void register_oss_dsp(snd_pcm_t *pcm, int index)
2436{
2437 char name[128];
2438 sprintf(name, "dsp%i%i", pcm->card->number, pcm->device);
2439 if (snd_register_oss_device(SNDRV_OSS_DEVICE_TYPE_PCM,
2440 pcm->card, index, &snd_pcm_oss_reg,
2441 name) < 0) {
2442 snd_printk("unable to register OSS PCM device %i:%i\n", pcm->card->number, pcm->device);
2443 }
2444}
2445
2446static int snd_pcm_oss_register_minor(snd_pcm_t * pcm)
2447{
2448 pcm->oss.reg = 0;
2449 if (dsp_map[pcm->card->number] == (int)pcm->device) {
2450 char name[128];
2451 int duplex;
2452 register_oss_dsp(pcm, 0);
2453 duplex = (pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream_count > 0 &&
2454 pcm->streams[SNDRV_PCM_STREAM_CAPTURE].substream_count &&
2455 !(pcm->info_flags & SNDRV_PCM_INFO_HALF_DUPLEX));
2456 sprintf(name, "%s%s", pcm->name, duplex ? " (DUPLEX)" : "");
2457#ifdef SNDRV_OSS_INFO_DEV_AUDIO
2458 snd_oss_info_register(SNDRV_OSS_INFO_DEV_AUDIO,
2459 pcm->card->number,
2460 name);
2461#endif
2462 pcm->oss.reg++;
2463 pcm->oss.reg_mask |= 1;
2464 }
2465 if (adsp_map[pcm->card->number] == (int)pcm->device) {
2466 register_oss_dsp(pcm, 1);
2467 pcm->oss.reg++;
2468 pcm->oss.reg_mask |= 2;
2469 }
2470
2471 if (pcm->oss.reg)
2472 snd_pcm_oss_proc_init(pcm);
2473
2474 return 0;
2475}
2476
2477static int snd_pcm_oss_disconnect_minor(snd_pcm_t * pcm)
2478{
2479 if (pcm->oss.reg) {
2480 if (pcm->oss.reg_mask & 1) {
2481 pcm->oss.reg_mask &= ~1;
2482 snd_unregister_oss_device(SNDRV_OSS_DEVICE_TYPE_PCM,
2483 pcm->card, 0);
2484 }
2485 if (pcm->oss.reg_mask & 2) {
2486 pcm->oss.reg_mask &= ~2;
2487 snd_unregister_oss_device(SNDRV_OSS_DEVICE_TYPE_PCM,
2488 pcm->card, 1);
2489 }
2490 }
2491 return 0;
2492}
2493
2494static int snd_pcm_oss_unregister_minor(snd_pcm_t * pcm)
2495{
2496 snd_pcm_oss_disconnect_minor(pcm);
2497 if (pcm->oss.reg) {
2498 if (dsp_map[pcm->card->number] == (int)pcm->device) {
2499#ifdef SNDRV_OSS_INFO_DEV_AUDIO
2500 snd_oss_info_unregister(SNDRV_OSS_INFO_DEV_AUDIO, pcm->card->number);
2501#endif
2502 }
2503 pcm->oss.reg = 0;
2504 snd_pcm_oss_proc_done(pcm);
2505 }
2506 return 0;
2507}
2508
2509static snd_pcm_notify_t snd_pcm_oss_notify =
2510{
2511 .n_register = snd_pcm_oss_register_minor,
2512 .n_disconnect = snd_pcm_oss_disconnect_minor,
2513 .n_unregister = snd_pcm_oss_unregister_minor,
2514};
2515
2516static int __init alsa_pcm_oss_init(void)
2517{
2518 int i;
2519 int err;
2520
2521 /* check device map table */
2522 for (i = 0; i < SNDRV_CARDS; i++) {
2523 if (dsp_map[i] < 0 || dsp_map[i] >= SNDRV_PCM_DEVICES) {
2524 snd_printk("invalid dsp_map[%d] = %d\n", i, dsp_map[i]);
2525 dsp_map[i] = 0;
2526 }
2527 if (adsp_map[i] < 0 || adsp_map[i] >= SNDRV_PCM_DEVICES) {
2528 snd_printk("invalid adsp_map[%d] = %d\n", i, adsp_map[i]);
2529 adsp_map[i] = 1;
2530 }
2531 }
2532 if ((err = snd_pcm_notify(&snd_pcm_oss_notify, 0)) < 0)
2533 return err;
2534 return 0;
2535}
2536
2537static void __exit alsa_pcm_oss_exit(void)
2538{
2539 snd_pcm_notify(&snd_pcm_oss_notify, 1);
2540}
2541
2542module_init(alsa_pcm_oss_init)
2543module_exit(alsa_pcm_oss_exit)
Linux kernel - Deliverables
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