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[ALSA] add another Phase 26 quirk
[linux-block.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>
543537bd 36#include <linux/string.h>
1da177e4
LT		 37#include <sound/core.h>
38#include <sound/minors.h>
39#include <sound/pcm.h>
40#include <sound/pcm_params.h>
41#include "pcm_plugin.h"
42#include <sound/info.h>
43#include <linux/soundcard.h>
44#include <sound/initval.h>
45
46#define OSS_ALSAEMULVER _SIOR ('M', 249, int)
47
48static int dsp_map[SNDRV_CARDS] = {[0 ... (SNDRV_CARDS-1)] = 0};
49static int adsp_map[SNDRV_CARDS] = {[0 ... (SNDRV_CARDS-1)] = 1};
50static int nonblock_open = 1;
51
52MODULE_AUTHOR("Jaroslav Kysela <perex@suse.cz>, Abramo Bagnara <abramo@alsa-project.org>");
53MODULE_DESCRIPTION("PCM OSS emulation for ALSA.");
54MODULE_LICENSE("GPL");
55module_param_array(dsp_map, int, NULL, 0444);
56MODULE_PARM_DESC(dsp_map, "PCM device number assigned to 1st OSS device.");
57module_param_array(adsp_map, int, NULL, 0444);
58MODULE_PARM_DESC(adsp_map, "PCM device number assigned to 2nd OSS device.");
59module_param(nonblock_open, bool, 0644);
60MODULE_PARM_DESC(nonblock_open, "Don't block opening busy PCM devices.");
61MODULE_ALIAS_SNDRV_MINOR(SNDRV_MINOR_OSS_PCM);
62MODULE_ALIAS_SNDRV_MINOR(SNDRV_MINOR_OSS_PCM1);
63
6ac77bc1
TI		 64extern int snd_mixer_oss_ioctl_card(struct snd_card *card, unsigned int cmd, unsigned long arg);
65static int snd_pcm_oss_get_rate(struct snd_pcm_oss_file *pcm_oss_file);
66static int snd_pcm_oss_get_channels(struct snd_pcm_oss_file *pcm_oss_file);
67static int snd_pcm_oss_get_format(struct snd_pcm_oss_file *pcm_oss_file);
1da177e4
LT		 68
69static inline mm_segment_t snd_enter_user(void)
70{
71 mm_segment_t fs = get_fs();
72 set_fs(get_ds());
73 return fs;
74}
75
76static inline void snd_leave_user(mm_segment_t fs)
77{
78 set_fs(fs);
79}
80
21a3479a 81#ifdef CONFIG_SND_PCM_OSS_PLUGINS
6ac77bc1 82static int snd_pcm_oss_plugin_clear(struct snd_pcm_substream *substream)
1da177e4 83{
6ac77bc1
TI		 84 struct snd_pcm_runtime *runtime = substream->runtime;
85 struct snd_pcm_plugin *plugin, *next;
1da177e4
LT		 86
87 plugin = runtime->oss.plugin_first;
88 while (plugin) {
89 next = plugin->next;
90 snd_pcm_plugin_free(plugin);
91 plugin = next;
92 }
93 runtime->oss.plugin_first = runtime->oss.plugin_last = NULL;
94 return 0;
95}
96
6ac77bc1 97static int snd_pcm_plugin_insert(struct snd_pcm_plugin *plugin)
1da177e4 98{
6ac77bc1 99 struct snd_pcm_runtime *runtime = plugin->plug->runtime;
1da177e4
LT		 100 plugin->next = runtime->oss.plugin_first;
101 plugin->prev = NULL;
102 if (runtime->oss.plugin_first) {
103 runtime->oss.plugin_first->prev = plugin;
104 runtime->oss.plugin_first = plugin;
105 } else {
106 runtime->oss.plugin_last =
107 runtime->oss.plugin_first = plugin;
108 }
109 return 0;
110}
111
6ac77bc1 112int snd_pcm_plugin_append(struct snd_pcm_plugin *plugin)
1da177e4 113{
6ac77bc1 114 struct snd_pcm_runtime *runtime = plugin->plug->runtime;
1da177e4
LT		 115 plugin->next = NULL;
116 plugin->prev = runtime->oss.plugin_last;
117 if (runtime->oss.plugin_last) {
118 runtime->oss.plugin_last->next = plugin;
119 runtime->oss.plugin_last = plugin;
120 } else {
121 runtime->oss.plugin_last =
122 runtime->oss.plugin_first = plugin;
123 }
124 return 0;
125}
21a3479a 126#endif /* CONFIG_SND_PCM_OSS_PLUGINS */
1da177e4 127
6ac77bc1 128static long snd_pcm_oss_bytes(struct snd_pcm_substream *substream, long frames)
1da177e4 129{
6ac77bc1 130 struct snd_pcm_runtime *runtime = substream->runtime;
af081613 131 long buffer_size = snd_pcm_lib_buffer_bytes(substream);
bfc5bddb 132 long bytes = frames_to_bytes(runtime, frames);
1da177e4 133 if (buffer_size == runtime->oss.buffer_bytes)
bfc5bddb 134 return bytes;
cdc5c53f
TI		 135#if BITS_PER_LONG >= 64
136 return runtime->oss.buffer_bytes * bytes / buffer_size;
137#else
138 {
139 u64 bsize = (u64)runtime->oss.buffer_bytes * (u64)bytes;
140 u32 rem;
141 div64_32(&bsize, buffer_size, &rem);
142 return (long)bsize;
143 }
144#endif
1da177e4
LT		 145}
146
6ac77bc1 147static long snd_pcm_alsa_frames(struct snd_pcm_substream *substream, long bytes)
1da177e4 148{
6ac77bc1 149 struct snd_pcm_runtime *runtime = substream->runtime;
af081613 150 long buffer_size = snd_pcm_lib_buffer_bytes(substream);
1da177e4
LT		 151 if (buffer_size == runtime->oss.buffer_bytes)
152 return bytes_to_frames(runtime, bytes);
153 return bytes_to_frames(runtime, (buffer_size * bytes) / runtime->oss.buffer_bytes);
154}
155
156static int snd_pcm_oss_format_from(int format)
157{
158 switch (format) {
159 case AFMT_MU_LAW: return SNDRV_PCM_FORMAT_MU_LAW;
160 case AFMT_A_LAW: return SNDRV_PCM_FORMAT_A_LAW;
161 case AFMT_IMA_ADPCM: return SNDRV_PCM_FORMAT_IMA_ADPCM;
162 case AFMT_U8: return SNDRV_PCM_FORMAT_U8;
163 case AFMT_S16_LE: return SNDRV_PCM_FORMAT_S16_LE;
164 case AFMT_S16_BE: return SNDRV_PCM_FORMAT_S16_BE;
165 case AFMT_S8: return SNDRV_PCM_FORMAT_S8;
166 case AFMT_U16_LE: return SNDRV_PCM_FORMAT_U16_LE;
167 case AFMT_U16_BE: return SNDRV_PCM_FORMAT_U16_BE;
168 case AFMT_MPEG: return SNDRV_PCM_FORMAT_MPEG;
169 default: return SNDRV_PCM_FORMAT_U8;
170 }
171}
172
173static int snd_pcm_oss_format_to(int format)
174{
175 switch (format) {
176 case SNDRV_PCM_FORMAT_MU_LAW: return AFMT_MU_LAW;
177 case SNDRV_PCM_FORMAT_A_LAW: return AFMT_A_LAW;
178 case SNDRV_PCM_FORMAT_IMA_ADPCM: return AFMT_IMA_ADPCM;
179 case SNDRV_PCM_FORMAT_U8: return AFMT_U8;
180 case SNDRV_PCM_FORMAT_S16_LE: return AFMT_S16_LE;
181 case SNDRV_PCM_FORMAT_S16_BE: return AFMT_S16_BE;
182 case SNDRV_PCM_FORMAT_S8: return AFMT_S8;
183 case SNDRV_PCM_FORMAT_U16_LE: return AFMT_U16_LE;
184 case SNDRV_PCM_FORMAT_U16_BE: return AFMT_U16_BE;
185 case SNDRV_PCM_FORMAT_MPEG: return AFMT_MPEG;
186 default: return -EINVAL;
187 }
188}
189
6ac77bc1
TI		 190static int snd_pcm_oss_period_size(struct snd_pcm_substream *substream,
191 struct snd_pcm_hw_params *oss_params,
192 struct snd_pcm_hw_params *slave_params)
1da177e4
LT		 193{
194 size_t s;
195 size_t oss_buffer_size, oss_period_size, oss_periods;
196 size_t min_period_size, max_period_size;
6ac77bc1 197 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 198 size_t oss_frame_size;
199
200 oss_frame_size = snd_pcm_format_physical_width(params_format(oss_params)) *
201 params_channels(oss_params) / 8;
202
203 oss_buffer_size = snd_pcm_plug_client_size(substream,
204 snd_pcm_hw_param_value_max(slave_params, SNDRV_PCM_HW_PARAM_BUFFER_SIZE, NULL)) * oss_frame_size;
205 oss_buffer_size = 1 << ld2(oss_buffer_size);
206 if (atomic_read(&runtime->mmap_count)) {
207 if (oss_buffer_size > runtime->oss.mmap_bytes)
208 oss_buffer_size = runtime->oss.mmap_bytes;
209 }
210
060d77b9
TI		 211 if (substream->oss.setup.period_size > 16)
212 oss_period_size = substream->oss.setup.period_size;
1da177e4
LT		 213 else if (runtime->oss.fragshift) {
214 oss_period_size = 1 << runtime->oss.fragshift;
215 if (oss_period_size > oss_buffer_size / 2)
216 oss_period_size = oss_buffer_size / 2;
217 } else {
218 int sd;
219 size_t bytes_per_sec = params_rate(oss_params) * snd_pcm_format_physical_width(params_format(oss_params)) * params_channels(oss_params) / 8;
220
221 oss_period_size = oss_buffer_size;
222 do {
223 oss_period_size /= 2;
224 } while (oss_period_size > bytes_per_sec);
225 if (runtime->oss.subdivision == 0) {
226 sd = 4;
227 if (oss_period_size / sd > 4096)
228 sd *= 2;
229 if (oss_period_size / sd < 4096)
230 sd = 1;
231 } else
232 sd = runtime->oss.subdivision;
233 oss_period_size /= sd;
234 if (oss_period_size < 16)
235 oss_period_size = 16;
236 }
237
238 min_period_size = snd_pcm_plug_client_size(substream,
239 snd_pcm_hw_param_value_min(slave_params, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, NULL));
240 min_period_size *= oss_frame_size;
241 min_period_size = 1 << (ld2(min_period_size - 1) + 1);
242 if (oss_period_size < min_period_size)
243 oss_period_size = min_period_size;
244
245 max_period_size = snd_pcm_plug_client_size(substream,
246 snd_pcm_hw_param_value_max(slave_params, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, NULL));
247 max_period_size *= oss_frame_size;
248 max_period_size = 1 << ld2(max_period_size);
249 if (oss_period_size > max_period_size)
250 oss_period_size = max_period_size;
251
252 oss_periods = oss_buffer_size / oss_period_size;
253
060d77b9
TI		 254 if (substream->oss.setup.periods > 1)
255 oss_periods = substream->oss.setup.periods;
1da177e4
LT		 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
6ac77bc1
TI		 279static int choose_rate(struct snd_pcm_substream *substream,
280 struct snd_pcm_hw_params *params, unsigned int best_rate)
1da177e4 281{
6ac77bc1
TI		 282 struct snd_interval *it;
283 struct snd_pcm_hw_params *save;
1da177e4
LT		 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
6ac77bc1 319static int snd_pcm_oss_change_params(struct snd_pcm_substream *substream)
1da177e4 320{
6ac77bc1
TI		 321 struct snd_pcm_runtime *runtime = substream->runtime;
322 struct snd_pcm_hw_params *params, *sparams;
323 struct snd_pcm_sw_params *sw_params;
1da177e4
LT		 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;
6ac77bc1
TI		 329 struct snd_mask sformat_mask;
330 struct snd_mask mask;
1da177e4
LT		 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
060d77b9 341 if (atomic_read(&runtime->mmap_count))
1da177e4 342 direct = 1;
060d77b9
TI		 343 else
344 direct = substream->oss.setup.direct;
1da177e4
LT		 345
346 _snd_pcm_hw_params_any(sparams);
347 _snd_pcm_hw_param_setinteger(sparams, SNDRV_PCM_HW_PARAM_PERIODS);
348 _snd_pcm_hw_param_min(sparams, SNDRV_PCM_HW_PARAM_PERIODS, 2, 0);
349 snd_mask_none(&mask);
350 if (atomic_read(&runtime->mmap_count))
351 snd_mask_set(&mask, SNDRV_PCM_ACCESS_MMAP_INTERLEAVED);
352 else {
353 snd_mask_set(&mask, SNDRV_PCM_ACCESS_RW_INTERLEAVED);
354 if (!direct)
355 snd_mask_set(&mask, SNDRV_PCM_ACCESS_RW_NONINTERLEAVED);
356 }
357 err = snd_pcm_hw_param_mask(substream, sparams, SNDRV_PCM_HW_PARAM_ACCESS, &mask);
358 if (err < 0) {
359 snd_printd("No usable accesses\n");
360 err = -EINVAL;
361 goto failure;
362 }
363 choose_rate(substream, sparams, runtime->oss.rate);
364 snd_pcm_hw_param_near(substream, sparams, SNDRV_PCM_HW_PARAM_CHANNELS, runtime->oss.channels, NULL);
365
366 format = snd_pcm_oss_format_from(runtime->oss.format);
367
368 sformat_mask = *hw_param_mask(sparams, SNDRV_PCM_HW_PARAM_FORMAT);
369 if (direct)
370 sformat = format;
371 else
372 sformat = snd_pcm_plug_slave_format(format, &sformat_mask);
373
374 if (sformat < 0 || !snd_mask_test(&sformat_mask, sformat)) {
375 for (sformat = 0; sformat <= SNDRV_PCM_FORMAT_LAST; sformat++) {
376 if (snd_mask_test(&sformat_mask, sformat) &&
377 snd_pcm_oss_format_to(sformat) >= 0)
378 break;
379 }
380 if (sformat > SNDRV_PCM_FORMAT_LAST) {
381 snd_printd("Cannot find a format!!!\n");
382 err = -EINVAL;
383 goto failure;
384 }
385 }
386 err = _snd_pcm_hw_param_set(sparams, SNDRV_PCM_HW_PARAM_FORMAT, sformat, 0);
387 snd_assert(err >= 0, goto failure);
388
389 if (direct) {
390 memcpy(params, sparams, sizeof(*params));
391 } else {
392 _snd_pcm_hw_params_any(params);
393 _snd_pcm_hw_param_set(params, SNDRV_PCM_HW_PARAM_ACCESS,
394 SNDRV_PCM_ACCESS_RW_INTERLEAVED, 0);
395 _snd_pcm_hw_param_set(params, SNDRV_PCM_HW_PARAM_FORMAT,
396 snd_pcm_oss_format_from(runtime->oss.format), 0);
397 _snd_pcm_hw_param_set(params, SNDRV_PCM_HW_PARAM_CHANNELS,
398 runtime->oss.channels, 0);
399 _snd_pcm_hw_param_set(params, SNDRV_PCM_HW_PARAM_RATE,
400 runtime->oss.rate, 0);
401 pdprintf("client: access = %i, format = %i, channels = %i, rate = %i\n",
402 params_access(params), params_format(params),
403 params_channels(params), params_rate(params));
404 }
405 pdprintf("slave: access = %i, format = %i, channels = %i, rate = %i\n",
406 params_access(sparams), params_format(sparams),
407 params_channels(sparams), params_rate(sparams));
408
409 oss_frame_size = snd_pcm_format_physical_width(params_format(params)) *
410 params_channels(params) / 8;
411
21a3479a 412#ifdef CONFIG_SND_PCM_OSS_PLUGINS
1da177e4
LT		 413 snd_pcm_oss_plugin_clear(substream);
414 if (!direct) {
415 /* add necessary plugins */
416 snd_pcm_oss_plugin_clear(substream);
417 if ((err = snd_pcm_plug_format_plugins(substream,
418 params,
419 sparams)) < 0) {
420 snd_printd("snd_pcm_plug_format_plugins failed: %i\n", err);
421 snd_pcm_oss_plugin_clear(substream);
422 goto failure;
423 }
424 if (runtime->oss.plugin_first) {
6ac77bc1 425 struct snd_pcm_plugin *plugin;
1da177e4
LT		 426 if ((err = snd_pcm_plugin_build_io(substream, sparams, &plugin)) < 0) {
427 snd_printd("snd_pcm_plugin_build_io failed: %i\n", err);
428 snd_pcm_oss_plugin_clear(substream);
429 goto failure;
430 }
431 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
432 err = snd_pcm_plugin_append(plugin);
433 } else {
434 err = snd_pcm_plugin_insert(plugin);
435 }
436 if (err < 0) {
437 snd_pcm_oss_plugin_clear(substream);
438 goto failure;
439 }
440 }
441 }
21a3479a 442#endif
1da177e4
LT		 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) ||
060d77b9 480 substream->oss.setup.nosilence) {
1da177e4
LT		 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);
21a3479a 500#ifdef CONFIG_SND_PCM_OSS_PLUGINS
1da177e4
LT		 501 if (runtime->oss.plugin_first) {
502 err = snd_pcm_plug_alloc(substream, oss_period_size);
503 if (err < 0)
504 goto failure;
505 }
21a3479a 506#endif
1da177e4
LT		 507 oss_period_size *= oss_frame_size;
508
509 oss_buffer_size = oss_period_size * runtime->oss.periods;
510 snd_assert(oss_buffer_size >= 0, err = -EINVAL; goto failure);
511
512 runtime->oss.period_bytes = oss_period_size;
513 runtime->oss.buffer_bytes = oss_buffer_size;
514
515 pdprintf("oss: period bytes = %i, buffer bytes = %i\n",
516 runtime->oss.period_bytes,
517 runtime->oss.buffer_bytes);
518 pdprintf("slave: period_size = %i, buffer_size = %i\n",
519 params_period_size(sparams),
520 params_buffer_size(sparams));
521
522 runtime->oss.format = snd_pcm_oss_format_to(params_format(params));
523 runtime->oss.channels = params_channels(params);
524 runtime->oss.rate = params_rate(params);
525
526 runtime->oss.params = 0;
527 runtime->oss.prepare = 1;
528 vfree(runtime->oss.buffer);
529 runtime->oss.buffer = vmalloc(runtime->oss.period_bytes);
530 runtime->oss.buffer_used = 0;
531 if (runtime->dma_area)
532 snd_pcm_format_set_silence(runtime->format, runtime->dma_area, bytes_to_samples(runtime, runtime->dma_bytes));
533
534 runtime->oss.period_frames = snd_pcm_alsa_frames(substream, oss_period_size);
535
536 err = 0;
537failure:
538 kfree(sw_params);
539 kfree(params);
540 kfree(sparams);
541 return err;
542}
543
6ac77bc1 544static int snd_pcm_oss_get_active_substream(struct snd_pcm_oss_file *pcm_oss_file, struct snd_pcm_substream **r_substream)
1da177e4
LT		 545{
546 int idx, err;
6ac77bc1 547 struct snd_pcm_substream *asubstream = NULL, *substream;
1da177e4
LT		 548
549 for (idx = 0; idx < 2; idx++) {
550 substream = pcm_oss_file->streams[idx];
551 if (substream == NULL)
552 continue;
553 if (asubstream == NULL)
554 asubstream = substream;
555 if (substream->runtime->oss.params) {
556 err = snd_pcm_oss_change_params(substream);
557 if (err < 0)
558 return err;
559 }
560 }
561 snd_assert(asubstream != NULL, return -EIO);
562 if (r_substream)
563 *r_substream = asubstream;
564 return 0;
565}
566
6ac77bc1 567static int snd_pcm_oss_prepare(struct snd_pcm_substream *substream)
1da177e4
LT		 568{
569 int err;
6ac77bc1 570 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 571
572 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_PREPARE, NULL);
573 if (err < 0) {
574 snd_printd("snd_pcm_oss_prepare: SNDRV_PCM_IOCTL_PREPARE failed\n");
575 return err;
576 }
577 runtime->oss.prepare = 0;
578 runtime->oss.prev_hw_ptr_interrupt = 0;
579 runtime->oss.period_ptr = 0;
580 runtime->oss.buffer_used = 0;
581
582 return 0;
583}
584
6ac77bc1 585static int snd_pcm_oss_make_ready(struct snd_pcm_substream *substream)
1da177e4 586{
6ac77bc1 587 struct snd_pcm_runtime *runtime;
1da177e4
LT		 588 int err;
589
590 if (substream == NULL)
591 return 0;
592 runtime = substream->runtime;
593 if (runtime->oss.params) {
594 err = snd_pcm_oss_change_params(substream);
595 if (err < 0)
596 return err;
597 }
598 if (runtime->oss.prepare) {
599 err = snd_pcm_oss_prepare(substream);
600 if (err < 0)
601 return err;
602 }
603 return 0;
604}
605
6ac77bc1 606static int snd_pcm_oss_capture_position_fixup(struct snd_pcm_substream *substream, snd_pcm_sframes_t *delay)
1da177e4 607{
6ac77bc1 608 struct snd_pcm_runtime *runtime;
1da177e4
LT		 609 snd_pcm_uframes_t frames;
610 int err = 0;
611
612 while (1) {
613 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DELAY, delay);
614 if (err < 0)
615 break;
616 runtime = substream->runtime;
617 if (*delay <= (snd_pcm_sframes_t)runtime->buffer_size)
618 break;
619 /* in case of overrun, skip whole periods like OSS/Linux driver does */
620 /* until avail(delay) <= buffer_size */
621 frames = (*delay - runtime->buffer_size) + runtime->period_size - 1;
622 frames /= runtime->period_size;
623 frames *= runtime->period_size;
624 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_FORWARD, &frames);
625 if (err < 0)
626 break;
627 }
628 return err;
629}
630
6ac77bc1 631snd_pcm_sframes_t snd_pcm_oss_write3(struct snd_pcm_substream *substream, const char *ptr, snd_pcm_uframes_t frames, int in_kernel)
1da177e4 632{
6ac77bc1 633 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 634 int ret;
635 while (1) {
636 if (runtime->status->state == SNDRV_PCM_STATE_XRUN ||
637 runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) {
638#ifdef OSS_DEBUG
639 if (runtime->status->state == SNDRV_PCM_STATE_XRUN)
640 printk("pcm_oss: write: recovering from XRUN\n");
641 else
642 printk("pcm_oss: write: recovering from SUSPEND\n");
643#endif
644 ret = snd_pcm_oss_prepare(substream);
645 if (ret < 0)
646 break;
647 }
648 if (in_kernel) {
649 mm_segment_t fs;
650 fs = snd_enter_user();
651 ret = snd_pcm_lib_write(substream, (void __user *)ptr, frames);
652 snd_leave_user(fs);
653 } else {
654 ret = snd_pcm_lib_write(substream, (void __user *)ptr, frames);
655 }
656 if (ret != -EPIPE && ret != -ESTRPIPE)
657 break;
658 /* test, if we can't store new data, because the stream */
659 /* has not been started */
660 if (runtime->status->state == SNDRV_PCM_STATE_PREPARED)
661 return -EAGAIN;
662 }
663 return ret;
664}
665
6ac77bc1 666snd_pcm_sframes_t snd_pcm_oss_read3(struct snd_pcm_substream *substream, char *ptr, snd_pcm_uframes_t frames, int in_kernel)
1da177e4 667{
6ac77bc1 668 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 669 snd_pcm_sframes_t delay;
670 int ret;
671 while (1) {
672 if (runtime->status->state == SNDRV_PCM_STATE_XRUN ||
673 runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) {
674#ifdef OSS_DEBUG
675 if (runtime->status->state == SNDRV_PCM_STATE_XRUN)
676 printk("pcm_oss: read: recovering from XRUN\n");
677 else
678 printk("pcm_oss: read: recovering from SUSPEND\n");
679#endif
680 ret = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DRAIN, NULL);
681 if (ret < 0)
682 break;
683 } else if (runtime->status->state == SNDRV_PCM_STATE_SETUP) {
684 ret = snd_pcm_oss_prepare(substream);
685 if (ret < 0)
686 break;
687 }
688 ret = snd_pcm_oss_capture_position_fixup(substream, &delay);
689 if (ret < 0)
690 break;
691 if (in_kernel) {
692 mm_segment_t fs;
693 fs = snd_enter_user();
694 ret = snd_pcm_lib_read(substream, (void __user *)ptr, frames);
695 snd_leave_user(fs);
696 } else {
697 ret = snd_pcm_lib_read(substream, (void __user *)ptr, frames);
698 }
699 if (ret == -EPIPE) {
700 if (runtime->status->state == SNDRV_PCM_STATE_DRAINING) {
701 ret = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DROP, NULL);
702 if (ret < 0)
703 break;
704 }
705 continue;
706 }
707 if (ret != -ESTRPIPE)
708 break;
709 }
710 return ret;
711}
712
6ac77bc1 713snd_pcm_sframes_t snd_pcm_oss_writev3(struct snd_pcm_substream *substream, void **bufs, snd_pcm_uframes_t frames, int in_kernel)
1da177e4 714{
6ac77bc1 715 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 716 int ret;
717 while (1) {
718 if (runtime->status->state == SNDRV_PCM_STATE_XRUN ||
719 runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) {
720#ifdef OSS_DEBUG
721 if (runtime->status->state == SNDRV_PCM_STATE_XRUN)
722 printk("pcm_oss: writev: recovering from XRUN\n");
723 else
724 printk("pcm_oss: writev: recovering from SUSPEND\n");
725#endif
726 ret = snd_pcm_oss_prepare(substream);
727 if (ret < 0)
728 break;
729 }
730 if (in_kernel) {
731 mm_segment_t fs;
732 fs = snd_enter_user();
733 ret = snd_pcm_lib_writev(substream, (void __user **)bufs, frames);
734 snd_leave_user(fs);
735 } else {
736 ret = snd_pcm_lib_writev(substream, (void __user **)bufs, frames);
737 }
738 if (ret != -EPIPE && ret != -ESTRPIPE)
739 break;
740
741 /* test, if we can't store new data, because the stream */
742 /* has not been started */
743 if (runtime->status->state == SNDRV_PCM_STATE_PREPARED)
744 return -EAGAIN;
745 }
746 return ret;
747}
748
6ac77bc1 749snd_pcm_sframes_t snd_pcm_oss_readv3(struct snd_pcm_substream *substream, void **bufs, snd_pcm_uframes_t frames, int in_kernel)
1da177e4 750{
6ac77bc1 751 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 752 int ret;
753 while (1) {
754 if (runtime->status->state == SNDRV_PCM_STATE_XRUN ||
755 runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) {
756#ifdef OSS_DEBUG
757 if (runtime->status->state == SNDRV_PCM_STATE_XRUN)
758 printk("pcm_oss: readv: recovering from XRUN\n");
759 else
760 printk("pcm_oss: readv: recovering from SUSPEND\n");
761#endif
762 ret = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DRAIN, NULL);
763 if (ret < 0)
764 break;
765 } else if (runtime->status->state == SNDRV_PCM_STATE_SETUP) {
766 ret = snd_pcm_oss_prepare(substream);
767 if (ret < 0)
768 break;
769 }
770 if (in_kernel) {
771 mm_segment_t fs;
772 fs = snd_enter_user();
773 ret = snd_pcm_lib_readv(substream, (void __user **)bufs, frames);
774 snd_leave_user(fs);
775 } else {
776 ret = snd_pcm_lib_readv(substream, (void __user **)bufs, frames);
777 }
778 if (ret != -EPIPE && ret != -ESTRPIPE)
779 break;
780 }
781 return ret;
782}
783
6ac77bc1 784static ssize_t snd_pcm_oss_write2(struct snd_pcm_substream *substream, const char *buf, size_t bytes, int in_kernel)
1da177e4 785{
6ac77bc1 786 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4 787 snd_pcm_sframes_t frames, frames1;
21a3479a 788#ifdef CONFIG_SND_PCM_OSS_PLUGINS
1da177e4 789 if (runtime->oss.plugin_first) {
6ac77bc1 790 struct snd_pcm_plugin_channel *channels;
1da177e4
LT		 791 size_t oss_frame_bytes = (runtime->oss.plugin_first->src_width * runtime->oss.plugin_first->src_format.channels) / 8;
792 if (!in_kernel) {
793 if (copy_from_user(runtime->oss.buffer, (const char __user *)buf, bytes))
794 return -EFAULT;
795 buf = runtime->oss.buffer;
796 }
797 frames = bytes / oss_frame_bytes;
798 frames1 = snd_pcm_plug_client_channels_buf(substream, (char *)buf, frames, &channels);
799 if (frames1 < 0)
800 return frames1;
801 frames1 = snd_pcm_plug_write_transfer(substream, channels, frames1);
802 if (frames1 <= 0)
803 return frames1;
804 bytes = frames1 * oss_frame_bytes;
21a3479a
JK		 805 } else
806#endif
807 {
1da177e4
LT		 808 frames = bytes_to_frames(runtime, bytes);
809 frames1 = snd_pcm_oss_write3(substream, buf, frames, in_kernel);
810 if (frames1 <= 0)
811 return frames1;
812 bytes = frames_to_bytes(runtime, frames1);
813 }
814 return bytes;
815}
816
6ac77bc1 817static ssize_t snd_pcm_oss_write1(struct snd_pcm_substream *substream, const char __user *buf, size_t bytes)
1da177e4
LT		 818{
819 size_t xfer = 0;
820 ssize_t tmp;
6ac77bc1 821 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 822
823 if (atomic_read(&runtime->mmap_count))
824 return -ENXIO;
825
826 if ((tmp = snd_pcm_oss_make_ready(substream)) < 0)
827 return tmp;
828 while (bytes > 0) {
829 if (bytes < runtime->oss.period_bytes || runtime->oss.buffer_used > 0) {
830 tmp = bytes;
831 if (tmp + runtime->oss.buffer_used > runtime->oss.period_bytes)
832 tmp = runtime->oss.period_bytes - runtime->oss.buffer_used;
833 if (tmp > 0) {
834 if (copy_from_user(runtime->oss.buffer + runtime->oss.buffer_used, buf, tmp))
835 return xfer > 0 ? (snd_pcm_sframes_t)xfer : -EFAULT;
836 }
837 runtime->oss.buffer_used += tmp;
838 buf += tmp;
839 bytes -= tmp;
840 xfer += tmp;
060d77b9 841 if (substream->oss.setup.partialfrag ||
1da177e4
LT		 842 runtime->oss.buffer_used == runtime->oss.period_bytes) {
843 tmp = snd_pcm_oss_write2(substream, runtime->oss.buffer + runtime->oss.period_ptr,
844 runtime->oss.buffer_used - runtime->oss.period_ptr, 1);
845 if (tmp <= 0)
846 return xfer > 0 ? (snd_pcm_sframes_t)xfer : tmp;
847 runtime->oss.bytes += tmp;
848 runtime->oss.period_ptr += tmp;
849 runtime->oss.period_ptr %= runtime->oss.period_bytes;
850 if (runtime->oss.period_ptr == 0 ||
851 runtime->oss.period_ptr == runtime->oss.buffer_used)
852 runtime->oss.buffer_used = 0;
853 else if ((substream->ffile->f_flags & O_NONBLOCK) != 0)
854 return xfer > 0 ? xfer : -EAGAIN;
855 }
856 } else {
4d23359b
CL		 857 tmp = snd_pcm_oss_write2(substream,
858 (const char __force *)buf,
859 runtime->oss.period_bytes, 0);
1da177e4
LT		 860 if (tmp <= 0)
861 return xfer > 0 ? (snd_pcm_sframes_t)xfer : tmp;
862 runtime->oss.bytes += tmp;
863 buf += tmp;
864 bytes -= tmp;
865 xfer += tmp;
866 if ((substream->ffile->f_flags & O_NONBLOCK) != 0 &&
867 tmp != runtime->oss.period_bytes)
868 break;
869 }
870 }
871 return xfer;
872}
873
6ac77bc1 874static ssize_t snd_pcm_oss_read2(struct snd_pcm_substream *substream, char *buf, size_t bytes, int in_kernel)
1da177e4 875{
6ac77bc1 876 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4 877 snd_pcm_sframes_t frames, frames1;
21a3479a 878#ifdef CONFIG_SND_PCM_OSS_PLUGINS
1da177e4
LT		 879 char __user *final_dst = (char __user *)buf;
880 if (runtime->oss.plugin_first) {
6ac77bc1 881 struct snd_pcm_plugin_channel *channels;
1da177e4
LT		 882 size_t oss_frame_bytes = (runtime->oss.plugin_last->dst_width * runtime->oss.plugin_last->dst_format.channels) / 8;
883 if (!in_kernel)
884 buf = runtime->oss.buffer;
885 frames = bytes / oss_frame_bytes;
886 frames1 = snd_pcm_plug_client_channels_buf(substream, buf, frames, &channels);
887 if (frames1 < 0)
888 return frames1;
889 frames1 = snd_pcm_plug_read_transfer(substream, channels, frames1);
890 if (frames1 <= 0)
891 return frames1;
892 bytes = frames1 * oss_frame_bytes;
893 if (!in_kernel && copy_to_user(final_dst, buf, bytes))
894 return -EFAULT;
21a3479a
JK		 895 } else
896#endif
897 {
1da177e4
LT		 898 frames = bytes_to_frames(runtime, bytes);
899 frames1 = snd_pcm_oss_read3(substream, buf, frames, in_kernel);
900 if (frames1 <= 0)
901 return frames1;
902 bytes = frames_to_bytes(runtime, frames1);
903 }
904 return bytes;
905}
906
6ac77bc1 907static ssize_t snd_pcm_oss_read1(struct snd_pcm_substream *substream, char __user *buf, size_t bytes)
1da177e4
LT		 908{
909 size_t xfer = 0;
910 ssize_t tmp;
6ac77bc1 911 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 912
913 if (atomic_read(&runtime->mmap_count))
914 return -ENXIO;
915
916 if ((tmp = snd_pcm_oss_make_ready(substream)) < 0)
917 return tmp;
918 while (bytes > 0) {
919 if (bytes < runtime->oss.period_bytes || runtime->oss.buffer_used > 0) {
920 if (runtime->oss.buffer_used == 0) {
921 tmp = snd_pcm_oss_read2(substream, runtime->oss.buffer, runtime->oss.period_bytes, 1);
922 if (tmp <= 0)
923 return xfer > 0 ? (snd_pcm_sframes_t)xfer : tmp;
924 runtime->oss.bytes += tmp;
925 runtime->oss.period_ptr = tmp;
926 runtime->oss.buffer_used = tmp;
927 }
928 tmp = bytes;
929 if ((size_t) tmp > runtime->oss.buffer_used)
930 tmp = runtime->oss.buffer_used;
931 if (copy_to_user(buf, runtime->oss.buffer + (runtime->oss.period_ptr - runtime->oss.buffer_used), tmp))
932 return xfer > 0 ? (snd_pcm_sframes_t)xfer : -EFAULT;
933 buf += tmp;
934 bytes -= tmp;
935 xfer += tmp;
936 runtime->oss.buffer_used -= tmp;
937 } else {
4d23359b
CL		 938 tmp = snd_pcm_oss_read2(substream, (char __force *)buf,
939 runtime->oss.period_bytes, 0);
1da177e4
LT		 940 if (tmp <= 0)
941 return xfer > 0 ? (snd_pcm_sframes_t)xfer : tmp;
942 runtime->oss.bytes += tmp;
943 buf += tmp;
944 bytes -= tmp;
945 xfer += tmp;
946 }
947 }
948 return xfer;
949}
950
6ac77bc1 951static int snd_pcm_oss_reset(struct snd_pcm_oss_file *pcm_oss_file)
1da177e4 952{
6ac77bc1 953 struct snd_pcm_substream *substream;
1da177e4
LT		 954
955 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
956 if (substream != NULL) {
bf1bbb5a 957 snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DROP, NULL);
1da177e4
LT		 958 substream->runtime->oss.prepare = 1;
959 }
960 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
961 if (substream != NULL) {
bf1bbb5a 962 snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DROP, NULL);
1da177e4
LT		 963 substream->runtime->oss.prepare = 1;
964 }
965 return 0;
966}
967
6ac77bc1 968static int snd_pcm_oss_post(struct snd_pcm_oss_file *pcm_oss_file)
1da177e4 969{
6ac77bc1 970 struct snd_pcm_substream *substream;
1da177e4
LT		 971 int err;
972
973 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
974 if (substream != NULL) {
975 if ((err = snd_pcm_oss_make_ready(substream)) < 0)
976 return err;
bf1bbb5a 977 snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_START, NULL);
1da177e4
LT		 978 }
979 /* note: all errors from the start action are ignored */
980 /* OSS apps do not know, how to handle them */
981 return 0;
982}
983
6ac77bc1 984static int snd_pcm_oss_sync1(struct snd_pcm_substream *substream, size_t size)
1da177e4 985{
6ac77bc1 986 struct snd_pcm_runtime *runtime;
1da177e4
LT		 987 ssize_t result = 0;
988 long res;
989 wait_queue_t wait;
990
991 runtime = substream->runtime;
992 init_waitqueue_entry(&wait, current);
993 add_wait_queue(&runtime->sleep, &wait);
994#ifdef OSS_DEBUG
995 printk("sync1: size = %li\n", size);
996#endif
997 while (1) {
998 result = snd_pcm_oss_write2(substream, runtime->oss.buffer, size, 1);
999 if (result > 0) {
1000 runtime->oss.buffer_used = 0;
1001 result = 0;
1002 break;
1003 }
1004 if (result != 0 && result != -EAGAIN)
1005 break;
1006 result = 0;
1007 set_current_state(TASK_INTERRUPTIBLE);
1008 snd_pcm_stream_lock_irq(substream);
1009 res = runtime->status->state;
1010 snd_pcm_stream_unlock_irq(substream);
1011 if (res != SNDRV_PCM_STATE_RUNNING) {
1012 set_current_state(TASK_RUNNING);
1013 break;
1014 }
1015 res = schedule_timeout(10 * HZ);
1016 if (signal_pending(current)) {
1017 result = -ERESTARTSYS;
1018 break;
1019 }
1020 if (res == 0) {
1021 snd_printk(KERN_ERR "OSS sync error - DMA timeout\n");
1022 result = -EIO;
1023 break;
1024 }
1025 }
1026 remove_wait_queue(&runtime->sleep, &wait);
1027 return result;
1028}
1029
6ac77bc1 1030static int snd_pcm_oss_sync(struct snd_pcm_oss_file *pcm_oss_file)
1da177e4
LT		 1031{
1032 int err = 0;
1033 unsigned int saved_f_flags;
6ac77bc1
TI		 1034 struct snd_pcm_substream *substream;
1035 struct snd_pcm_runtime *runtime;
1da177e4
LT		 1036 snd_pcm_format_t format;
1037 unsigned long width;
1038 size_t size;
1039
1040 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
1041 if (substream != NULL) {
1042 runtime = substream->runtime;
1043 if (atomic_read(&runtime->mmap_count))
1044 goto __direct;
1045 if ((err = snd_pcm_oss_make_ready(substream)) < 0)
1046 return err;
1047 format = snd_pcm_oss_format_from(runtime->oss.format);
1048 width = snd_pcm_format_physical_width(format);
1049 if (runtime->oss.buffer_used > 0) {
1050#ifdef OSS_DEBUG
1051 printk("sync: buffer_used\n");
1052#endif
1053 size = (8 * (runtime->oss.period_bytes - runtime->oss.buffer_used) + 7) / width;
1054 snd_pcm_format_set_silence(format,
1055 runtime->oss.buffer + runtime->oss.buffer_used,
1056 size);
1057 err = snd_pcm_oss_sync1(substream, runtime->oss.period_bytes);
1058 if (err < 0)
1059 return err;
1060 } else if (runtime->oss.period_ptr > 0) {
1061#ifdef OSS_DEBUG
1062 printk("sync: period_ptr\n");
1063#endif
1064 size = runtime->oss.period_bytes - runtime->oss.period_ptr;
1065 snd_pcm_format_set_silence(format,
1066 runtime->oss.buffer,
1067 size * 8 / width);
1068 err = snd_pcm_oss_sync1(substream, size);
1069 if (err < 0)
1070 return err;
1071 }
1072 /*
1073 * The ALSA's period might be a bit large than OSS one.
1074 * Fill the remain portion of ALSA period with zeros.
1075 */
1076 size = runtime->control->appl_ptr % runtime->period_size;
1077 if (size > 0) {
1078 size = runtime->period_size - size;
1079 if (runtime->access == SNDRV_PCM_ACCESS_RW_INTERLEAVED) {
1080 size = (runtime->frame_bits * size) / 8;
1081 while (size > 0) {
1082 mm_segment_t fs;
1083 size_t size1 = size < runtime->oss.period_bytes ? size : runtime->oss.period_bytes;
1084 size -= size1;
1085 size1 *= 8;
1086 size1 /= runtime->sample_bits;
1087 snd_pcm_format_set_silence(runtime->format,
1088 runtime->oss.buffer,
1089 size1);
1090 fs = snd_enter_user();
1091 snd_pcm_lib_write(substream, (void __user *)runtime->oss.buffer, size1);
1092 snd_leave_user(fs);
1093 }
1094 } else if (runtime->access == SNDRV_PCM_ACCESS_RW_NONINTERLEAVED) {
1095 void __user *buffers[runtime->channels];
1096 memset(buffers, 0, runtime->channels * sizeof(void *));
1097 snd_pcm_lib_writev(substream, buffers, size);
1098 }
1099 }
1100 /*
1101 * finish sync: drain the buffer
1102 */
1103 __direct:
1104 saved_f_flags = substream->ffile->f_flags;
1105 substream->ffile->f_flags &= ~O_NONBLOCK;
bf1bbb5a 1106 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DRAIN, NULL);
1da177e4
LT		 1107 substream->ffile->f_flags = saved_f_flags;
1108 if (err < 0)
1109 return err;
1110 runtime->oss.prepare = 1;
1111 }
1112
1113 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
1114 if (substream != NULL) {
1115 if ((err = snd_pcm_oss_make_ready(substream)) < 0)
1116 return err;
1117 runtime = substream->runtime;
bf1bbb5a 1118 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DROP, NULL);
1da177e4
LT		 1119 if (err < 0)
1120 return err;
1121 runtime->oss.buffer_used = 0;
1122 runtime->oss.prepare = 1;
1123 }
1124 return 0;
1125}
1126
6ac77bc1 1127static int snd_pcm_oss_set_rate(struct snd_pcm_oss_file *pcm_oss_file, int rate)
1da177e4
LT		 1128{
1129 int idx;
1130
1131 for (idx = 1; idx >= 0; --idx) {
6ac77bc1
TI		 1132 struct snd_pcm_substream *substream = pcm_oss_file->streams[idx];
1133 struct snd_pcm_runtime *runtime;
1da177e4
LT		 1134 if (substream == NULL)
1135 continue;
1136 runtime = substream->runtime;
1137 if (rate < 1000)
1138 rate = 1000;
1139 else if (rate > 192000)
1140 rate = 192000;
1141 if (runtime->oss.rate != rate) {
1142 runtime->oss.params = 1;
1143 runtime->oss.rate = rate;
1144 }
1145 }
1146 return snd_pcm_oss_get_rate(pcm_oss_file);
1147}
1148
6ac77bc1 1149static int snd_pcm_oss_get_rate(struct snd_pcm_oss_file *pcm_oss_file)
1da177e4 1150{
6ac77bc1 1151 struct snd_pcm_substream *substream;
1da177e4
LT		 1152 int err;
1153
1154 if ((err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream)) < 0)
1155 return err;
1156 return substream->runtime->oss.rate;
1157}
1158
6ac77bc1 1159static int snd_pcm_oss_set_channels(struct snd_pcm_oss_file *pcm_oss_file, unsigned int channels)
1da177e4
LT		 1160{
1161 int idx;
1162 if (channels < 1)
1163 channels = 1;
1164 if (channels > 128)
1165 return -EINVAL;
1166 for (idx = 1; idx >= 0; --idx) {
6ac77bc1
TI		 1167 struct snd_pcm_substream *substream = pcm_oss_file->streams[idx];
1168 struct snd_pcm_runtime *runtime;
1da177e4
LT		 1169 if (substream == NULL)
1170 continue;
1171 runtime = substream->runtime;
1172 if (runtime->oss.channels != channels) {
1173 runtime->oss.params = 1;
1174 runtime->oss.channels = channels;
1175 }
1176 }
1177 return snd_pcm_oss_get_channels(pcm_oss_file);
1178}
1179
6ac77bc1 1180static int snd_pcm_oss_get_channels(struct snd_pcm_oss_file *pcm_oss_file)
1da177e4 1181{
6ac77bc1 1182 struct snd_pcm_substream *substream;
1da177e4
LT		 1183 int err;
1184
1185 if ((err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream)) < 0)
1186 return err;
1187 return substream->runtime->oss.channels;
1188}
1189
6ac77bc1 1190static int snd_pcm_oss_get_block_size(struct snd_pcm_oss_file *pcm_oss_file)
1da177e4 1191{
6ac77bc1 1192 struct snd_pcm_substream *substream;
1da177e4
LT		 1193 int err;
1194
1195 if ((err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream)) < 0)
1196 return err;
1197 return substream->runtime->oss.period_bytes;
1198}
1199
6ac77bc1 1200static int snd_pcm_oss_get_formats(struct snd_pcm_oss_file *pcm_oss_file)
1da177e4 1201{
6ac77bc1 1202 struct snd_pcm_substream *substream;
1da177e4
LT		 1203 int err;
1204 int direct;
6ac77bc1 1205 struct snd_pcm_hw_params *params;
1da177e4 1206 unsigned int formats = 0;
6ac77bc1 1207 struct snd_mask format_mask;
1da177e4
LT		 1208 int fmt;
1209
1210 if ((err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream)) < 0)
1211 return err;
060d77b9 1212 if (atomic_read(&substream->runtime->mmap_count))
1da177e4 1213 direct = 1;
060d77b9
TI		 1214 else
1215 direct = substream->oss.setup.direct;
1da177e4
LT		 1216 if (!direct)
1217 return AFMT_MU_LAW | AFMT_U8 |
1218 AFMT_S16_LE | AFMT_S16_BE |
1219 AFMT_S8 | AFMT_U16_LE |
1220 AFMT_U16_BE;
1221 params = kmalloc(sizeof(*params), GFP_KERNEL);
1222 if (!params)
1223 return -ENOMEM;
1224 _snd_pcm_hw_params_any(params);
1225 err = snd_pcm_hw_refine(substream, params);
1226 format_mask = *hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT);
1227 kfree(params);
1228 snd_assert(err >= 0, return err);
1229 for (fmt = 0; fmt < 32; ++fmt) {
1230 if (snd_mask_test(&format_mask, fmt)) {
1231 int f = snd_pcm_oss_format_to(fmt);
1232 if (f >= 0)
1233 formats |= f;
1234 }
1235 }
1236 return formats;
1237}
1238
6ac77bc1 1239static int snd_pcm_oss_set_format(struct snd_pcm_oss_file *pcm_oss_file, int format)
1da177e4
LT		 1240{
1241 int formats, idx;
1242
1243 if (format != AFMT_QUERY) {
1244 formats = snd_pcm_oss_get_formats(pcm_oss_file);
1245 if (!(formats & format))
1246 format = AFMT_U8;
1247 for (idx = 1; idx >= 0; --idx) {
6ac77bc1
TI		 1248 struct snd_pcm_substream *substream = pcm_oss_file->streams[idx];
1249 struct snd_pcm_runtime *runtime;
1da177e4
LT		 1250 if (substream == NULL)
1251 continue;
1252 runtime = substream->runtime;
1253 if (runtime->oss.format != format) {
1254 runtime->oss.params = 1;
1255 runtime->oss.format = format;
1256 }
1257 }
1258 }
1259 return snd_pcm_oss_get_format(pcm_oss_file);
1260}
1261
6ac77bc1 1262static int snd_pcm_oss_get_format(struct snd_pcm_oss_file *pcm_oss_file)
1da177e4 1263{
6ac77bc1 1264 struct snd_pcm_substream *substream;
1da177e4
LT		 1265 int err;
1266
1267 if ((err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream)) < 0)
1268 return err;
1269 return substream->runtime->oss.format;
1270}
1271
6ac77bc1 1272static int snd_pcm_oss_set_subdivide1(struct snd_pcm_substream *substream, int subdivide)
1da177e4 1273{
6ac77bc1 1274 struct snd_pcm_runtime *runtime;
1da177e4
LT		 1275
1276 if (substream == NULL)
1277 return 0;
1278 runtime = substream->runtime;
1279 if (subdivide == 0) {
1280 subdivide = runtime->oss.subdivision;
1281 if (subdivide == 0)
1282 subdivide = 1;
1283 return subdivide;
1284 }
1285 if (runtime->oss.subdivision || runtime->oss.fragshift)
1286 return -EINVAL;
1287 if (subdivide != 1 && subdivide != 2 && subdivide != 4 &&
1288 subdivide != 8 && subdivide != 16)
1289 return -EINVAL;
1290 runtime->oss.subdivision = subdivide;
1291 runtime->oss.params = 1;
1292 return subdivide;
1293}
1294
6ac77bc1 1295static int snd_pcm_oss_set_subdivide(struct snd_pcm_oss_file *pcm_oss_file, int subdivide)
1da177e4
LT		 1296{
1297 int err = -EINVAL, idx;
1298
1299 for (idx = 1; idx >= 0; --idx) {
6ac77bc1 1300 struct snd_pcm_substream *substream = pcm_oss_file->streams[idx];
1da177e4
LT		 1301 if (substream == NULL)
1302 continue;
1303 if ((err = snd_pcm_oss_set_subdivide1(substream, subdivide)) < 0)
1304 return err;
1305 }
1306 return err;
1307}
1308
6ac77bc1 1309static int snd_pcm_oss_set_fragment1(struct snd_pcm_substream *substream, unsigned int val)
1da177e4 1310{
6ac77bc1 1311 struct snd_pcm_runtime *runtime;
1da177e4
LT		 1312
1313 if (substream == NULL)
1314 return 0;
1315 runtime = substream->runtime;
1316 if (runtime->oss.subdivision || runtime->oss.fragshift)
1317 return -EINVAL;
1318 runtime->oss.fragshift = val & 0xffff;
1319 runtime->oss.maxfrags = (val >> 16) & 0xffff;
1320 if (runtime->oss.fragshift < 4) /* < 16 */
1321 runtime->oss.fragshift = 4;
1322 if (runtime->oss.maxfrags < 2)
1323 runtime->oss.maxfrags = 2;
1324 runtime->oss.params = 1;
1325 return 0;
1326}
1327
6ac77bc1 1328static int snd_pcm_oss_set_fragment(struct snd_pcm_oss_file *pcm_oss_file, unsigned int val)
1da177e4
LT		 1329{
1330 int err = -EINVAL, idx;
1331
1332 for (idx = 1; idx >= 0; --idx) {
6ac77bc1 1333 struct snd_pcm_substream *substream = pcm_oss_file->streams[idx];
1da177e4
LT		 1334 if (substream == NULL)
1335 continue;
1336 if ((err = snd_pcm_oss_set_fragment1(substream, val)) < 0)
1337 return err;
1338 }
1339 return err;
1340}
1341
1342static int snd_pcm_oss_nonblock(struct file * file)
1343{
1344 file->f_flags |= O_NONBLOCK;
1345 return 0;
1346}
1347
6ac77bc1 1348static int snd_pcm_oss_get_caps1(struct snd_pcm_substream *substream, int res)
1da177e4
LT		 1349{
1350
1351 if (substream == NULL) {
1352 res &= ~DSP_CAP_DUPLEX;
1353 return res;
1354 }
1355#ifdef DSP_CAP_MULTI
1356 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
1357 if (substream->pstr->substream_count > 1)
1358 res |= DSP_CAP_MULTI;
1359#endif
1360 /* DSP_CAP_REALTIME is set all times: */
1361 /* all ALSA drivers can return actual pointer in ring buffer */
1362#if defined(DSP_CAP_REALTIME) && 0
1363 {
6ac77bc1 1364 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 1365 if (runtime->info & (SNDRV_PCM_INFO_BLOCK_TRANSFER|SNDRV_PCM_INFO_BATCH))
1366 res &= ~DSP_CAP_REALTIME;
1367 }
1368#endif
1369 return res;
1370}
1371
6ac77bc1 1372static int snd_pcm_oss_get_caps(struct snd_pcm_oss_file *pcm_oss_file)
1da177e4
LT		 1373{
1374 int result, idx;
1375
1376 result = DSP_CAP_TRIGGER | DSP_CAP_MMAP | DSP_CAP_DUPLEX | DSP_CAP_REALTIME;
1377 for (idx = 0; idx < 2; idx++) {
6ac77bc1 1378 struct snd_pcm_substream *substream = pcm_oss_file->streams[idx];
1da177e4
LT		 1379 result = snd_pcm_oss_get_caps1(substream, result);
1380 }
1381 result |= 0x0001; /* revision - same as SB AWE 64 */
1382 return result;
1383}
1384
6ac77bc1 1385static void snd_pcm_oss_simulate_fill(struct snd_pcm_substream *substream, snd_pcm_uframes_t hw_ptr)
1da177e4 1386{
6ac77bc1 1387 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 1388 snd_pcm_uframes_t appl_ptr;
1389 appl_ptr = hw_ptr + runtime->buffer_size;
1390 appl_ptr %= runtime->boundary;
1391 runtime->control->appl_ptr = appl_ptr;
1392}
1393
6ac77bc1 1394static int snd_pcm_oss_set_trigger(struct snd_pcm_oss_file *pcm_oss_file, int trigger)
1da177e4 1395{
6ac77bc1
TI		 1396 struct snd_pcm_runtime *runtime;
1397 struct snd_pcm_substream *psubstream = NULL, *csubstream = NULL;
1da177e4
LT		 1398 int err, cmd;
1399
1400#ifdef OSS_DEBUG
1401 printk("pcm_oss: trigger = 0x%x\n", trigger);
1402#endif
1403
1404 psubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
1405 csubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
1406
1407 if (psubstream) {
1408 if ((err = snd_pcm_oss_make_ready(psubstream)) < 0)
1409 return err;
1410 }
1411 if (csubstream) {
1412 if ((err = snd_pcm_oss_make_ready(csubstream)) < 0)
1413 return err;
1414 }
1415 if (psubstream) {
1416 runtime = psubstream->runtime;
1417 if (trigger & PCM_ENABLE_OUTPUT) {
1418 if (runtime->oss.trigger)
1419 goto _skip1;
1420 if (atomic_read(&psubstream->runtime->mmap_count))
1421 snd_pcm_oss_simulate_fill(psubstream, runtime->hw_ptr_interrupt);
1422 runtime->oss.trigger = 1;
1423 runtime->start_threshold = 1;
1424 cmd = SNDRV_PCM_IOCTL_START;
1425 } else {
1426 if (!runtime->oss.trigger)
1427 goto _skip1;
1428 runtime->oss.trigger = 0;
1429 runtime->start_threshold = runtime->boundary;
1430 cmd = SNDRV_PCM_IOCTL_DROP;
1431 runtime->oss.prepare = 1;
1432 }
bf1bbb5a 1433 err = snd_pcm_kernel_ioctl(psubstream, cmd, NULL);
1da177e4
LT		 1434 if (err < 0)
1435 return err;
1436 }
1437 _skip1:
1438 if (csubstream) {
1439 runtime = csubstream->runtime;
1440 if (trigger & PCM_ENABLE_INPUT) {
1441 if (runtime->oss.trigger)
1442 goto _skip2;
1443 runtime->oss.trigger = 1;
1444 runtime->start_threshold = 1;
1445 cmd = SNDRV_PCM_IOCTL_START;
1446 } else {
1447 if (!runtime->oss.trigger)
1448 goto _skip2;
1449 runtime->oss.trigger = 0;
1450 runtime->start_threshold = runtime->boundary;
1451 cmd = SNDRV_PCM_IOCTL_DROP;
1452 runtime->oss.prepare = 1;
1453 }
bf1bbb5a 1454 err = snd_pcm_kernel_ioctl(csubstream, cmd, NULL);
1da177e4
LT		 1455 if (err < 0)
1456 return err;
1457 }
1458 _skip2:
1459 return 0;
1460}
1461
6ac77bc1 1462static int snd_pcm_oss_get_trigger(struct snd_pcm_oss_file *pcm_oss_file)
1da177e4 1463{
6ac77bc1 1464 struct snd_pcm_substream *psubstream = NULL, *csubstream = NULL;
1da177e4
LT		 1465 int result = 0;
1466
1467 psubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
1468 csubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
1469 if (psubstream && psubstream->runtime && psubstream->runtime->oss.trigger)
1470 result |= PCM_ENABLE_OUTPUT;
1471 if (csubstream && csubstream->runtime && csubstream->runtime->oss.trigger)
1472 result |= PCM_ENABLE_INPUT;
1473 return result;
1474}
1475
6ac77bc1 1476static int snd_pcm_oss_get_odelay(struct snd_pcm_oss_file *pcm_oss_file)
1da177e4 1477{
6ac77bc1
TI		 1478 struct snd_pcm_substream *substream;
1479 struct snd_pcm_runtime *runtime;
1da177e4
LT		 1480 snd_pcm_sframes_t delay;
1481 int err;
1482
1483 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
1484 if (substream == NULL)
1485 return -EINVAL;
1486 if ((err = snd_pcm_oss_make_ready(substream)) < 0)
1487 return err;
1488 runtime = substream->runtime;
1489 if (runtime->oss.params || runtime->oss.prepare)
1490 return 0;
bf1bbb5a 1491 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DELAY, &delay);
1da177e4
LT		 1492 if (err == -EPIPE)
1493 delay = 0; /* hack for broken OSS applications */
1494 else if (err < 0)
1495 return err;
1496 return snd_pcm_oss_bytes(substream, delay);
1497}
1498
6ac77bc1 1499static int snd_pcm_oss_get_ptr(struct snd_pcm_oss_file *pcm_oss_file, int stream, struct count_info __user * _info)
1da177e4 1500{
6ac77bc1
TI		 1501 struct snd_pcm_substream *substream;
1502 struct snd_pcm_runtime *runtime;
1da177e4
LT		 1503 snd_pcm_sframes_t delay;
1504 int fixup;
1505 struct count_info info;
1506 int err;
1507
1508 if (_info == NULL)
1509 return -EFAULT;
1510 substream = pcm_oss_file->streams[stream];
1511 if (substream == NULL)
1512 return -EINVAL;
1513 if ((err = snd_pcm_oss_make_ready(substream)) < 0)
1514 return err;
1515 runtime = substream->runtime;
1516 if (runtime->oss.params || runtime->oss.prepare) {
1517 memset(&info, 0, sizeof(info));
1518 if (copy_to_user(_info, &info, sizeof(info)))
1519 return -EFAULT;
1520 return 0;
1521 }
1522 if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
1523 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DELAY, &delay);
1524 if (err == -EPIPE || err == -ESTRPIPE || (! err && delay < 0)) {
1525 err = 0;
1526 delay = 0;
1527 fixup = 0;
1528 } else {
1529 fixup = runtime->oss.buffer_used;
1530 }
1531 } else {
1532 err = snd_pcm_oss_capture_position_fixup(substream, &delay);
1533 fixup = -runtime->oss.buffer_used;
1534 }
1535 if (err < 0)
1536 return err;
1537 info.ptr = snd_pcm_oss_bytes(substream, runtime->status->hw_ptr % runtime->buffer_size);
1538 if (atomic_read(&runtime->mmap_count)) {
1539 snd_pcm_sframes_t n;
1540 n = (delay = runtime->hw_ptr_interrupt) - runtime->oss.prev_hw_ptr_interrupt;
1541 if (n < 0)
1542 n += runtime->boundary;
1543 info.blocks = n / runtime->period_size;
1544 runtime->oss.prev_hw_ptr_interrupt = delay;
1545 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
1546 snd_pcm_oss_simulate_fill(substream, delay);
1547 info.bytes = snd_pcm_oss_bytes(substream, runtime->status->hw_ptr) & INT_MAX;
1548 } else {
5ac0fab9 1549 delay = snd_pcm_oss_bytes(substream, delay);
fb4bd0ad 1550 if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
060d77b9 1551 if (substream->oss.setup.buggyptr)
10f69f9e
TI		 1552 info.blocks = (runtime->oss.buffer_bytes - delay - fixup) / runtime->oss.period_bytes;
1553 else
1554 info.blocks = (delay + fixup) / runtime->oss.period_bytes;
1da177e4 1555 info.bytes = (runtime->oss.bytes - delay) & INT_MAX;
fb4bd0ad 1556 } else {
5ac0fab9
JK		 1557 delay += fixup;
1558 info.blocks = delay / runtime->oss.period_bytes;
1da177e4 1559 info.bytes = (runtime->oss.bytes + delay) & INT_MAX;
fb4bd0ad 1560 }
1da177e4
LT		 1561 }
1562 if (copy_to_user(_info, &info, sizeof(info)))
1563 return -EFAULT;
1564 return 0;
1565}
1566
6ac77bc1 1567static int snd_pcm_oss_get_space(struct snd_pcm_oss_file *pcm_oss_file, int stream, struct audio_buf_info __user *_info)
1da177e4 1568{
6ac77bc1
TI		 1569 struct snd_pcm_substream *substream;
1570 struct snd_pcm_runtime *runtime;
1da177e4
LT		 1571 snd_pcm_sframes_t avail;
1572 int fixup;
1573 struct audio_buf_info info;
1574 int err;
1575
1576 if (_info == NULL)
1577 return -EFAULT;
1578 substream = pcm_oss_file->streams[stream];
1579 if (substream == NULL)
1580 return -EINVAL;
1581 runtime = substream->runtime;
1582
1583 if (runtime->oss.params &&
1584 (err = snd_pcm_oss_change_params(substream)) < 0)
1585 return err;
1586
1587 info.fragsize = runtime->oss.period_bytes;
1588 info.fragstotal = runtime->periods;
1589 if (runtime->oss.prepare) {
1590 if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
1591 info.bytes = runtime->oss.period_bytes * runtime->oss.periods;
1592 info.fragments = runtime->oss.periods;
1593 } else {
1594 info.bytes = 0;
1595 info.fragments = 0;
1596 }
1597 } else {
1598 if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
1599 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DELAY, &avail);
1600 if (err == -EPIPE || err == -ESTRPIPE || (! err && avail < 0)) {
1601 avail = runtime->buffer_size;
1602 err = 0;
1603 fixup = 0;
1604 } else {
1605 avail = runtime->buffer_size - avail;
1606 fixup = -runtime->oss.buffer_used;
1607 }
1608 } else {
1609 err = snd_pcm_oss_capture_position_fixup(substream, &avail);
1610 fixup = runtime->oss.buffer_used;
1611 }
1612 if (err < 0)
1613 return err;
1614 info.bytes = snd_pcm_oss_bytes(substream, avail) + fixup;
1615 info.fragments = info.bytes / runtime->oss.period_bytes;
1616 }
1617
1618#ifdef OSS_DEBUG
1619 printk("pcm_oss: space: bytes = %i, fragments = %i, fragstotal = %i, fragsize = %i\n", info.bytes, info.fragments, info.fragstotal, info.fragsize);
1620#endif
1621 if (copy_to_user(_info, &info, sizeof(info)))
1622 return -EFAULT;
1623 return 0;
1624}
1625
6ac77bc1 1626static int snd_pcm_oss_get_mapbuf(struct snd_pcm_oss_file *pcm_oss_file, int stream, struct buffmem_desc __user * _info)
1da177e4
LT		 1627{
1628 // it won't be probably implemented
1629 // snd_printd("TODO: snd_pcm_oss_get_mapbuf\n");
1630 return -EINVAL;
1631}
1632
060d77b9 1633static const char *strip_task_path(const char *path)
1da177e4 1634{
060d77b9
TI		 1635 const char *ptr, *ptrl = NULL;
1636 for (ptr = path; *ptr; ptr++) {
1da177e4
LT		 1637 if (*ptr == '/')
1638 ptrl = ptr + 1;
1da177e4 1639 }
060d77b9
TI		 1640 return ptrl;
1641}
1642
1643static void snd_pcm_oss_look_for_setup(struct snd_pcm *pcm, int stream,
1644 const char *task_name,
1645 struct snd_pcm_oss_setup *rsetup)
1646{
1647 struct snd_pcm_oss_setup *setup;
1648
1649 mutex_lock(&pcm->streams[stream].oss.setup_mutex);
1650 do {
1651 for (setup = pcm->streams[stream].oss.setup_list; setup;
1652 setup = setup->next) {
1653 if (!strcmp(setup->task_name, task_name))
1654 goto out;
1da177e4 1655 }
060d77b9
TI		 1656 } while ((task_name = strip_task_path(task_name)) != NULL);
1657 out:
1658 if (setup)
1659 *rsetup = *setup;
1a60d4c5 1660 mutex_unlock(&pcm->streams[stream].oss.setup_mutex);
1da177e4
LT		 1661}
1662
3bf75f9b
TI		 1663static void snd_pcm_oss_release_substream(struct snd_pcm_substream *substream)
1664{
1665 struct snd_pcm_runtime *runtime;
1666 runtime = substream->runtime;
1667 vfree(runtime->oss.buffer);
1668 runtime->oss.buffer = NULL;
1669#ifdef CONFIG_SND_PCM_OSS_PLUGINS
1670 snd_pcm_oss_plugin_clear(substream);
1671#endif
1672 substream->oss.oss = 0;
1673}
1674
6ac77bc1
TI		 1675static void snd_pcm_oss_init_substream(struct snd_pcm_substream *substream,
1676 struct snd_pcm_oss_setup *setup,
1da177e4
LT		 1677 int minor)
1678{
6ac77bc1 1679 struct snd_pcm_runtime *runtime;
1da177e4
LT		 1680
1681 substream->oss.oss = 1;
060d77b9 1682 substream->oss.setup = *setup;
3bf75f9b
TI		 1683 if (setup->nonblock)
1684 substream->ffile->f_flags |= O_NONBLOCK;
1576274d 1685 else if (setup->block)
3bf75f9b 1686 substream->ffile->f_flags &= ~O_NONBLOCK;
1da177e4
LT		 1687 runtime = substream->runtime;
1688 runtime->oss.params = 1;
1689 runtime->oss.trigger = 1;
1690 runtime->oss.rate = 8000;
1691 switch (SNDRV_MINOR_OSS_DEVICE(minor)) {
1692 case SNDRV_MINOR_OSS_PCM_8:
1693 runtime->oss.format = AFMT_U8;
1694 break;
1695 case SNDRV_MINOR_OSS_PCM_16:
1696 runtime->oss.format = AFMT_S16_LE;
1697 break;
1698 default:
1699 runtime->oss.format = AFMT_MU_LAW;
1700 }
1701 runtime->oss.channels = 1;
1702 runtime->oss.fragshift = 0;
1703 runtime->oss.maxfrags = 0;
1704 runtime->oss.subdivision = 0;
3bf75f9b 1705 substream->pcm_release = snd_pcm_oss_release_substream;
1da177e4
LT		 1706}
1707
6ac77bc1 1708static int snd_pcm_oss_release_file(struct snd_pcm_oss_file *pcm_oss_file)
1da177e4
LT		 1709{
1710 int cidx;
1711 snd_assert(pcm_oss_file != NULL, return -ENXIO);
1712 for (cidx = 0; cidx < 2; ++cidx) {
6ac77bc1 1713 struct snd_pcm_substream *substream = pcm_oss_file->streams[cidx];
3bf75f9b
TI		 1714 if (substream)
1715 snd_pcm_release_substream(substream);
1da177e4
LT		 1716 }
1717 kfree(pcm_oss_file);
1718 return 0;
1719}
1720
1721static int snd_pcm_oss_open_file(struct file *file,
6ac77bc1
TI		 1722 struct snd_pcm *pcm,
1723 struct snd_pcm_oss_file **rpcm_oss_file,
1da177e4 1724 int minor,
060d77b9 1725 struct snd_pcm_oss_setup *setup)
1da177e4 1726{
3bf75f9b 1727 int idx, err;
6ac77bc1 1728 struct snd_pcm_oss_file *pcm_oss_file;
3bf75f9b 1729 struct snd_pcm_substream *substream;
1da177e4
LT		 1730 unsigned int f_mode = file->f_mode;
1731
1732 snd_assert(rpcm_oss_file != NULL, return -EINVAL);
1733 *rpcm_oss_file = NULL;
1734
ca2c0966 1735 pcm_oss_file = kzalloc(sizeof(*pcm_oss_file), GFP_KERNEL);
1da177e4
LT		 1736 if (pcm_oss_file == NULL)
1737 return -ENOMEM;
1738
1739 if ((f_mode & (FMODE_WRITE|FMODE_READ)) == (FMODE_WRITE|FMODE_READ) &&
1740 (pcm->info_flags & SNDRV_PCM_INFO_HALF_DUPLEX))
1741 f_mode = FMODE_WRITE;
3bf75f9b
TI		 1742
1743 for (idx = 0; idx < 2; idx++) {
060d77b9 1744 if (setup[idx].disable)
3bf75f9b
TI		 1745 continue;
1746 if (idx == SNDRV_PCM_STREAM_PLAYBACK) {
1747 if (! (f_mode & FMODE_WRITE))
1748 continue;
1749 } else {
1750 if (! (f_mode & FMODE_READ))
1751 continue;
1752 }
1753 err = snd_pcm_open_substream(pcm, idx, file, &substream);
1754 if (err < 0) {
1da177e4
LT		 1755 snd_pcm_oss_release_file(pcm_oss_file);
1756 return err;
1757 }
3bf75f9b
TI		 1758
1759 pcm_oss_file->streams[idx] = substream;
1576274d 1760 substream->file = pcm_oss_file;
060d77b9 1761 snd_pcm_oss_init_substream(substream, &setup[idx], minor);
1da177e4
LT		 1762 }
1763
bbdc1b7d 1764 if (!pcm_oss_file->streams[0] && !pcm_oss_file->streams[1]) {
1da177e4
LT		 1765 snd_pcm_oss_release_file(pcm_oss_file);
1766 return -EINVAL;
1767 }
1da177e4
LT		 1768
1769 file->private_data = pcm_oss_file;
1770 *rpcm_oss_file = pcm_oss_file;
1771 return 0;
1772}
1773
1774
93f2e378
TI		 1775static int snd_task_name(struct task_struct *task, char *name, size_t size)
1776{
1777 unsigned int idx;
1778
1779 snd_assert(task != NULL && name != NULL && size >= 2, return -EINVAL);
1780 for (idx = 0; idx < sizeof(task->comm) && idx + 1 < size; idx++)
1781 name[idx] = task->comm[idx];
1782 name[idx] = '\0';
1783 return 0;
1784}
1785
1da177e4
LT		 1786static int snd_pcm_oss_open(struct inode *inode, struct file *file)
1787{
1da177e4
LT		 1788 int err;
1789 char task_name[32];
6ac77bc1
TI		 1790 struct snd_pcm *pcm;
1791 struct snd_pcm_oss_file *pcm_oss_file;
060d77b9 1792 struct snd_pcm_oss_setup setup[2];
1da177e4
LT		 1793 int nonblock;
1794 wait_queue_t wait;
1795
f87135f5
CL		 1796 pcm = snd_lookup_oss_minor_data(iminor(inode),
1797 SNDRV_OSS_DEVICE_TYPE_PCM);
1da177e4
LT		 1798 if (pcm == NULL) {
1799 err = -ENODEV;
1800 goto __error1;
1801 }
1802 err = snd_card_file_add(pcm->card, file);
1803 if (err < 0)
1804 goto __error1;
1805 if (!try_module_get(pcm->card->module)) {
1806 err = -EFAULT;
1807 goto __error2;
1808 }
1809 if (snd_task_name(current, task_name, sizeof(task_name)) < 0) {
1810 err = -EFAULT;
1811 goto __error;
1812 }
1576274d 1813 memset(setup, 0, sizeof(setup));
1da177e4 1814 if (file->f_mode & FMODE_WRITE)
060d77b9
TI		 1815 snd_pcm_oss_look_for_setup(pcm, SNDRV_PCM_STREAM_PLAYBACK,
1816 task_name, &setup[0]);
1da177e4 1817 if (file->f_mode & FMODE_READ)
060d77b9
TI		 1818 snd_pcm_oss_look_for_setup(pcm, SNDRV_PCM_STREAM_CAPTURE,
1819 task_name, &setup[1]);
1da177e4
LT		 1820
1821 nonblock = !!(file->f_flags & O_NONBLOCK);
1da177e4
LT		 1822 if (!nonblock)
1823 nonblock = nonblock_open;
1824
1825 init_waitqueue_entry(&wait, current);
1826 add_wait_queue(&pcm->open_wait, &wait);
1a60d4c5 1827 mutex_lock(&pcm->open_mutex);
1da177e4
LT		 1828 while (1) {
1829 err = snd_pcm_oss_open_file(file, pcm, &pcm_oss_file,
3bf75f9b 1830 iminor(inode), setup);
1da177e4
LT		 1831 if (err >= 0)
1832 break;
1833 if (err == -EAGAIN) {
1834 if (nonblock) {
1835 err = -EBUSY;
1836 break;
1837 }
1838 } else
1839 break;
1840 set_current_state(TASK_INTERRUPTIBLE);
1a60d4c5 1841 mutex_unlock(&pcm->open_mutex);
1da177e4 1842 schedule();
1a60d4c5 1843 mutex_lock(&pcm->open_mutex);
1da177e4
LT		 1844 if (signal_pending(current)) {
1845 err = -ERESTARTSYS;
1846 break;
1847 }
1848 }
1849 remove_wait_queue(&pcm->open_wait, &wait);
1a60d4c5 1850 mutex_unlock(&pcm->open_mutex);
1da177e4
LT		 1851 if (err < 0)
1852 goto __error;
1853 return err;
1854
1855 __error:
1856 module_put(pcm->card->module);
1857 __error2:
1858 snd_card_file_remove(pcm->card, file);
1859 __error1:
1860 return err;
1861}
1862
1863static int snd_pcm_oss_release(struct inode *inode, struct file *file)
1864{
6ac77bc1
TI		 1865 struct snd_pcm *pcm;
1866 struct snd_pcm_substream *substream;
1867 struct snd_pcm_oss_file *pcm_oss_file;
1da177e4
LT		 1868
1869 pcm_oss_file = file->private_data;
1870 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
1871 if (substream == NULL)
1872 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
1873 snd_assert(substream != NULL, return -ENXIO);
1874 pcm = substream->pcm;
1875 snd_pcm_oss_sync(pcm_oss_file);
1a60d4c5 1876 mutex_lock(&pcm->open_mutex);
1da177e4 1877 snd_pcm_oss_release_file(pcm_oss_file);
1a60d4c5 1878 mutex_unlock(&pcm->open_mutex);
1da177e4
LT		 1879 wake_up(&pcm->open_wait);
1880 module_put(pcm->card->module);
1881 snd_card_file_remove(pcm->card, file);
1882 return 0;
1883}
1884
1885static long snd_pcm_oss_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
1886{
6ac77bc1 1887 struct snd_pcm_oss_file *pcm_oss_file;
1da177e4
LT		 1888 int __user *p = (int __user *)arg;
1889 int res;
1890
1891 pcm_oss_file = file->private_data;
1892 if (cmd == OSS_GETVERSION)
1893 return put_user(SNDRV_OSS_VERSION, p);
1894 if (cmd == OSS_ALSAEMULVER)
1895 return put_user(1, p);
1896#if defined(CONFIG_SND_MIXER_OSS) || (defined(MODULE) && defined(CONFIG_SND_MIXER_OSS_MODULE))
1897 if (((cmd >> 8) & 0xff) == 'M') { /* mixer ioctl - for OSS compatibility */
6ac77bc1 1898 struct snd_pcm_substream *substream;
1da177e4
LT		 1899 int idx;
1900 for (idx = 0; idx < 2; ++idx) {
1901 substream = pcm_oss_file->streams[idx];
1902 if (substream != NULL)
1903 break;
1904 }
1905 snd_assert(substream != NULL, return -ENXIO);
1906 return snd_mixer_oss_ioctl_card(substream->pcm->card, cmd, arg);
1907 }
1908#endif
1909 if (((cmd >> 8) & 0xff) != 'P')
1910 return -EINVAL;
1911#ifdef OSS_DEBUG
1912 printk("pcm_oss: ioctl = 0x%x\n", cmd);
1913#endif
1914 switch (cmd) {
1915 case SNDCTL_DSP_RESET:
1916 return snd_pcm_oss_reset(pcm_oss_file);
1917 case SNDCTL_DSP_SYNC:
1918 return snd_pcm_oss_sync(pcm_oss_file);
1919 case SNDCTL_DSP_SPEED:
1920 if (get_user(res, p))
1921 return -EFAULT;
1922 if ((res = snd_pcm_oss_set_rate(pcm_oss_file, res))<0)
1923 return res;
1924 return put_user(res, p);
1925 case SOUND_PCM_READ_RATE:
1926 res = snd_pcm_oss_get_rate(pcm_oss_file);
1927 if (res < 0)
1928 return res;
1929 return put_user(res, p);
1930 case SNDCTL_DSP_STEREO:
1931 if (get_user(res, p))
1932 return -EFAULT;
1933 res = res > 0 ? 2 : 1;
1934 if ((res = snd_pcm_oss_set_channels(pcm_oss_file, res)) < 0)
1935 return res;
1936 return put_user(--res, p);
1937 case SNDCTL_DSP_GETBLKSIZE:
1938 res = snd_pcm_oss_get_block_size(pcm_oss_file);
1939 if (res < 0)
1940 return res;
1941 return put_user(res, p);
1942 case SNDCTL_DSP_SETFMT:
1943 if (get_user(res, p))
1944 return -EFAULT;
1945 res = snd_pcm_oss_set_format(pcm_oss_file, res);
1946 if (res < 0)
1947 return res;
1948 return put_user(res, p);
1949 case SOUND_PCM_READ_BITS:
1950 res = snd_pcm_oss_get_format(pcm_oss_file);
1951 if (res < 0)
1952 return res;
1953 return put_user(res, p);
1954 case SNDCTL_DSP_CHANNELS:
1955 if (get_user(res, p))
1956 return -EFAULT;
1957 res = snd_pcm_oss_set_channels(pcm_oss_file, res);
1958 if (res < 0)
1959 return res;
1960 return put_user(res, p);
1961 case SOUND_PCM_READ_CHANNELS:
1962 res = snd_pcm_oss_get_channels(pcm_oss_file);
1963 if (res < 0)
1964 return res;
1965 return put_user(res, p);
1966 case SOUND_PCM_WRITE_FILTER:
1967 case SOUND_PCM_READ_FILTER:
1968 return -EIO;
1969 case SNDCTL_DSP_POST:
1970 return snd_pcm_oss_post(pcm_oss_file);
1971 case SNDCTL_DSP_SUBDIVIDE:
1972 if (get_user(res, p))
1973 return -EFAULT;
1974 res = snd_pcm_oss_set_subdivide(pcm_oss_file, res);
1975 if (res < 0)
1976 return res;
1977 return put_user(res, p);
1978 case SNDCTL_DSP_SETFRAGMENT:
1979 if (get_user(res, p))
1980 return -EFAULT;
1981 return snd_pcm_oss_set_fragment(pcm_oss_file, res);
1982 case SNDCTL_DSP_GETFMTS:
1983 res = snd_pcm_oss_get_formats(pcm_oss_file);
1984 if (res < 0)
1985 return res;
1986 return put_user(res, p);
1987 case SNDCTL_DSP_GETOSPACE:
1988 case SNDCTL_DSP_GETISPACE:
1989 return snd_pcm_oss_get_space(pcm_oss_file,
1990 cmd == SNDCTL_DSP_GETISPACE ?
1991 SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK,
1992 (struct audio_buf_info __user *) arg);
1993 case SNDCTL_DSP_NONBLOCK:
1994 return snd_pcm_oss_nonblock(file);
1995 case SNDCTL_DSP_GETCAPS:
1996 res = snd_pcm_oss_get_caps(pcm_oss_file);
1997 if (res < 0)
1998 return res;
1999 return put_user(res, p);
2000 case SNDCTL_DSP_GETTRIGGER:
2001 res = snd_pcm_oss_get_trigger(pcm_oss_file);
2002 if (res < 0)
2003 return res;
2004 return put_user(res, p);
2005 case SNDCTL_DSP_SETTRIGGER:
2006 if (get_user(res, p))
2007 return -EFAULT;
2008 return snd_pcm_oss_set_trigger(pcm_oss_file, res);
2009 case SNDCTL_DSP_GETIPTR:
2010 case SNDCTL_DSP_GETOPTR:
2011 return snd_pcm_oss_get_ptr(pcm_oss_file,
2012 cmd == SNDCTL_DSP_GETIPTR ?
2013 SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK,
2014 (struct count_info __user *) arg);
2015 case SNDCTL_DSP_MAPINBUF:
2016 case SNDCTL_DSP_MAPOUTBUF:
2017 return snd_pcm_oss_get_mapbuf(pcm_oss_file,
2018 cmd == SNDCTL_DSP_MAPINBUF ?
2019 SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK,
2020 (struct buffmem_desc __user *) arg);
2021 case SNDCTL_DSP_SETSYNCRO:
2022 /* stop DMA now.. */
2023 return 0;
2024 case SNDCTL_DSP_SETDUPLEX:
2025 if (snd_pcm_oss_get_caps(pcm_oss_file) & DSP_CAP_DUPLEX)
2026 return 0;
2027 return -EIO;
2028 case SNDCTL_DSP_GETODELAY:
2029 res = snd_pcm_oss_get_odelay(pcm_oss_file);
2030 if (res < 0) {
2031 /* it's for sure, some broken apps don't check for error codes */
2032 put_user(0, p);
2033 return res;
2034 }
2035 return put_user(res, p);
2036 case SNDCTL_DSP_PROFILE:
2037 return 0; /* silently ignore */
2038 default:
2039 snd_printd("pcm_oss: unknown command = 0x%x\n", cmd);
2040 }
2041 return -EINVAL;
2042}
2043
2044#ifdef CONFIG_COMPAT
2045/* all compatible */
2046#define snd_pcm_oss_ioctl_compat snd_pcm_oss_ioctl
2047#else
2048#define snd_pcm_oss_ioctl_compat NULL
2049#endif
2050
2051static ssize_t snd_pcm_oss_read(struct file *file, char __user *buf, size_t count, loff_t *offset)
2052{
6ac77bc1
TI		 2053 struct snd_pcm_oss_file *pcm_oss_file;
2054 struct snd_pcm_substream *substream;
1da177e4
LT		 2055
2056 pcm_oss_file = file->private_data;
2057 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
2058 if (substream == NULL)
2059 return -ENXIO;
2060#ifndef OSS_DEBUG
2061 return snd_pcm_oss_read1(substream, buf, count);
2062#else
2063 {
2064 ssize_t res = snd_pcm_oss_read1(substream, buf, count);
2065 printk("pcm_oss: read %li bytes (returned %li bytes)\n", (long)count, (long)res);
2066 return res;
2067 }
2068#endif
2069}
2070
2071static ssize_t snd_pcm_oss_write(struct file *file, const char __user *buf, size_t count, loff_t *offset)
2072{
6ac77bc1
TI		 2073 struct snd_pcm_oss_file *pcm_oss_file;
2074 struct snd_pcm_substream *substream;
1da177e4
LT		 2075 long result;
2076
2077 pcm_oss_file = file->private_data;
2078 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
2079 if (substream == NULL)
2080 return -ENXIO;
1da177e4 2081 result = snd_pcm_oss_write1(substream, buf, count);
1da177e4
LT		 2082#ifdef OSS_DEBUG
2083 printk("pcm_oss: write %li bytes (wrote %li bytes)\n", (long)count, (long)result);
2084#endif
2085 return result;
2086}
2087
6ac77bc1 2088static int snd_pcm_oss_playback_ready(struct snd_pcm_substream *substream)
1da177e4 2089{
6ac77bc1 2090 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 2091 if (atomic_read(&runtime->mmap_count))
2092 return runtime->oss.prev_hw_ptr_interrupt != runtime->hw_ptr_interrupt;
2093 else
2094 return snd_pcm_playback_avail(runtime) >= runtime->oss.period_frames;
2095}
2096
6ac77bc1 2097static int snd_pcm_oss_capture_ready(struct snd_pcm_substream *substream)
1da177e4 2098{
6ac77bc1 2099 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 2100 if (atomic_read(&runtime->mmap_count))
2101 return runtime->oss.prev_hw_ptr_interrupt != runtime->hw_ptr_interrupt;
2102 else
2103 return snd_pcm_capture_avail(runtime) >= runtime->oss.period_frames;
2104}
2105
2106static unsigned int snd_pcm_oss_poll(struct file *file, poll_table * wait)
2107{
6ac77bc1 2108 struct snd_pcm_oss_file *pcm_oss_file;
1da177e4 2109 unsigned int mask;
6ac77bc1 2110 struct snd_pcm_substream *psubstream = NULL, *csubstream = NULL;
1da177e4
LT		 2111
2112 pcm_oss_file = file->private_data;
2113
2114 psubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
2115 csubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
2116
2117 mask = 0;
2118 if (psubstream != NULL) {
6ac77bc1 2119 struct snd_pcm_runtime *runtime = psubstream->runtime;
1da177e4
LT		 2120 poll_wait(file, &runtime->sleep, wait);
2121 snd_pcm_stream_lock_irq(psubstream);
2122 if (runtime->status->state != SNDRV_PCM_STATE_DRAINING &&
2123 (runtime->status->state != SNDRV_PCM_STATE_RUNNING ||
2124 snd_pcm_oss_playback_ready(psubstream)))
2125 mask |= POLLOUT | POLLWRNORM;
2126 snd_pcm_stream_unlock_irq(psubstream);
2127 }
2128 if (csubstream != NULL) {
6ac77bc1
TI		 2129 struct snd_pcm_runtime *runtime = csubstream->runtime;
2130 snd_pcm_state_t ostate;
1da177e4
LT		 2131 poll_wait(file, &runtime->sleep, wait);
2132 snd_pcm_stream_lock_irq(csubstream);
2133 if ((ostate = runtime->status->state) != SNDRV_PCM_STATE_RUNNING ||
2134 snd_pcm_oss_capture_ready(csubstream))
2135 mask |= POLLIN | POLLRDNORM;
2136 snd_pcm_stream_unlock_irq(csubstream);
2137 if (ostate != SNDRV_PCM_STATE_RUNNING && runtime->oss.trigger) {
6ac77bc1 2138 struct snd_pcm_oss_file ofile;
1da177e4
LT		 2139 memset(&ofile, 0, sizeof(ofile));
2140 ofile.streams[SNDRV_PCM_STREAM_CAPTURE] = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
2141 runtime->oss.trigger = 0;
2142 snd_pcm_oss_set_trigger(&ofile, PCM_ENABLE_INPUT);
2143 }
2144 }
2145
2146 return mask;
2147}
2148
2149static int snd_pcm_oss_mmap(struct file *file, struct vm_area_struct *area)
2150{
6ac77bc1
TI		 2151 struct snd_pcm_oss_file *pcm_oss_file;
2152 struct snd_pcm_substream *substream = NULL;
2153 struct snd_pcm_runtime *runtime;
1da177e4
LT		 2154 int err;
2155
2156#ifdef OSS_DEBUG
2157 printk("pcm_oss: mmap begin\n");
2158#endif
2159 pcm_oss_file = file->private_data;
2160 switch ((area->vm_flags & (VM_READ | VM_WRITE))) {
2161 case VM_READ | VM_WRITE:
2162 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
2163 if (substream)
2164 break;
2165 /* Fall through */
2166 case VM_READ:
2167 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
2168 break;
2169 case VM_WRITE:
2170 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
2171 break;
2172 default:
2173 return -EINVAL;
2174 }
2175 /* set VM_READ access as well to fix memset() routines that do
2176 reads before writes (to improve performance) */
2177 area->vm_flags |= VM_READ;
2178 if (substream == NULL)
2179 return -ENXIO;
2180 runtime = substream->runtime;
2181 if (!(runtime->info & SNDRV_PCM_INFO_MMAP_VALID))
2182 return -EIO;
2183 if (runtime->info & SNDRV_PCM_INFO_INTERLEAVED)
2184 runtime->access = SNDRV_PCM_ACCESS_MMAP_INTERLEAVED;
2185 else
2186 return -EIO;
2187
2188 if (runtime->oss.params) {
2189 if ((err = snd_pcm_oss_change_params(substream)) < 0)
2190 return err;
2191 }
21a3479a 2192#ifdef CONFIG_SND_PCM_OSS_PLUGINS
1da177e4
LT		 2193 if (runtime->oss.plugin_first != NULL)
2194 return -EIO;
21a3479a 2195#endif
1da177e4
LT		 2196
2197 if (area->vm_pgoff != 0)
2198 return -EINVAL;
2199
2200 err = snd_pcm_mmap_data(substream, file, area);
2201 if (err < 0)
2202 return err;
2203 runtime->oss.mmap_bytes = area->vm_end - area->vm_start;
2204 runtime->silence_threshold = 0;
2205 runtime->silence_size = 0;
2206#ifdef OSS_DEBUG
2207 printk("pcm_oss: mmap ok, bytes = 0x%x\n", runtime->oss.mmap_bytes);
2208#endif
2209 /* In mmap mode we never stop */
2210 runtime->stop_threshold = runtime->boundary;
2211
2212 return 0;
2213}
2214
04f141a8 2215#ifdef CONFIG_PROC_FS
1da177e4
LT		 2216/*
2217 * /proc interface
2218 */
2219
6ac77bc1
TI		 2220static void snd_pcm_oss_proc_read(struct snd_info_entry *entry,
2221 struct snd_info_buffer *buffer)
1da177e4 2222{
6ac77bc1
TI		 2223 struct snd_pcm_str *pstr = entry->private_data;
2224 struct snd_pcm_oss_setup *setup = pstr->oss.setup_list;
1a60d4c5 2225 mutex_lock(&pstr->oss.setup_mutex);
1da177e4
LT		 2226 while (setup) {
2227 snd_iprintf(buffer, "%s %u %u%s%s%s%s%s%s\n",
2228 setup->task_name,
2229 setup->periods,
2230 setup->period_size,
2231 setup->disable ? " disable" : "",
2232 setup->direct ? " direct" : "",
2233 setup->block ? " block" : "",
2234 setup->nonblock ? " non-block" : "",
2235 setup->partialfrag ? " partial-frag" : "",
2236 setup->nosilence ? " no-silence" : "");
2237 setup = setup->next;
2238 }
1a60d4c5 2239 mutex_unlock(&pstr->oss.setup_mutex);
1da177e4
LT		 2240}
2241
6ac77bc1 2242static void snd_pcm_oss_proc_free_setup_list(struct snd_pcm_str * pstr)
1da177e4 2243{
6ac77bc1 2244 struct snd_pcm_oss_setup *setup, *setupn;
1da177e4 2245
1da177e4
LT		 2246 for (setup = pstr->oss.setup_list, pstr->oss.setup_list = NULL;
2247 setup; setup = setupn) {
2248 setupn = setup->next;
2249 kfree(setup->task_name);
2250 kfree(setup);
2251 }
2252 pstr->oss.setup_list = NULL;
2253}
2254
6ac77bc1
TI		 2255static void snd_pcm_oss_proc_write(struct snd_info_entry *entry,
2256 struct snd_info_buffer *buffer)
1da177e4 2257{
6ac77bc1 2258 struct snd_pcm_str *pstr = entry->private_data;
1da177e4
LT		 2259 char line[128], str[32], task_name[32], *ptr;
2260 int idx1;
6ac77bc1 2261 struct snd_pcm_oss_setup *setup, *setup1, template;
1da177e4
LT		 2262
2263 while (!snd_info_get_line(buffer, line, sizeof(line))) {
1a60d4c5 2264 mutex_lock(&pstr->oss.setup_mutex);
1da177e4
LT		 2265 memset(&template, 0, sizeof(template));
2266 ptr = snd_info_get_str(task_name, line, sizeof(task_name));
2267 if (!strcmp(task_name, "clear") || !strcmp(task_name, "erase")) {
2268 snd_pcm_oss_proc_free_setup_list(pstr);
1a60d4c5 2269 mutex_unlock(&pstr->oss.setup_mutex);
1da177e4
LT		 2270 continue;
2271 }
2272 for (setup = pstr->oss.setup_list; setup; setup = setup->next) {
2273 if (!strcmp(setup->task_name, task_name)) {
2274 template = *setup;
2275 break;
2276 }
2277 }
2278 ptr = snd_info_get_str(str, ptr, sizeof(str));
2279 template.periods = simple_strtoul(str, NULL, 10);
2280 ptr = snd_info_get_str(str, ptr, sizeof(str));
2281 template.period_size = simple_strtoul(str, NULL, 10);
2282 for (idx1 = 31; idx1 >= 0; idx1--)
2283 if (template.period_size & (1 << idx1))
2284 break;
2285 for (idx1--; idx1 >= 0; idx1--)
2286 template.period_size &= ~(1 << idx1);
2287 do {
2288 ptr = snd_info_get_str(str, ptr, sizeof(str));
2289 if (!strcmp(str, "disable")) {
2290 template.disable = 1;
2291 } else if (!strcmp(str, "direct")) {
2292 template.direct = 1;
2293 } else if (!strcmp(str, "block")) {
2294 template.block = 1;
2295 } else if (!strcmp(str, "non-block")) {
2296 template.nonblock = 1;
2297 } else if (!strcmp(str, "partial-frag")) {
2298 template.partialfrag = 1;
2299 } else if (!strcmp(str, "no-silence")) {
2300 template.nosilence = 1;
10f69f9e
TI		 2301 } else if (!strcmp(str, "buggy-ptr")) {
2302 template.buggyptr = 1;
1da177e4
LT		 2303 }
2304 } while (*str);
2305 if (setup == NULL) {
060d77b9
TI		 2306 setup = kmalloc(sizeof(*setup), GFP_KERNEL);
2307 if (! setup) {
2308 buffer->error = -ENOMEM;
2309 mutex_lock(&pstr->oss.setup_mutex);
2310 return;
2311 }
2312 if (pstr->oss.setup_list == NULL)
2313 pstr->oss.setup_list = setup;
2314 else {
2315 for (setup1 = pstr->oss.setup_list;
2316 setup1->next; setup1 = setup1->next);
2317 setup1->next = setup;
2318 }
2319 template.task_name = kstrdup(task_name, GFP_KERNEL);
2320 if (! template.task_name) {
2321 kfree(setup);
1da177e4 2322 buffer->error = -ENOMEM;
060d77b9
TI		 2323 mutex_lock(&pstr->oss.setup_mutex);
2324 return;
1da177e4
LT		 2325 }
2326 }
060d77b9 2327 *setup = template;
1a60d4c5 2328 mutex_unlock(&pstr->oss.setup_mutex);
1da177e4
LT		 2329 }
2330}
2331
6ac77bc1 2332static void snd_pcm_oss_proc_init(struct snd_pcm *pcm)
1da177e4
LT		 2333{
2334 int stream;
2335 for (stream = 0; stream < 2; ++stream) {
6ac77bc1
TI		 2336 struct snd_info_entry *entry;
2337 struct snd_pcm_str *pstr = &pcm->streams[stream];
1da177e4
LT		 2338 if (pstr->substream_count == 0)
2339 continue;
2340 if ((entry = snd_info_create_card_entry(pcm->card, "oss", pstr->proc_root)) != NULL) {
2341 entry->content = SNDRV_INFO_CONTENT_TEXT;
2342 entry->mode = S_IFREG | S_IRUGO | S_IWUSR;
2343 entry->c.text.read_size = 8192;
2344 entry->c.text.read = snd_pcm_oss_proc_read;
2345 entry->c.text.write_size = 8192;
2346 entry->c.text.write = snd_pcm_oss_proc_write;
2347 entry->private_data = pstr;
2348 if (snd_info_register(entry) < 0) {
2349 snd_info_free_entry(entry);
2350 entry = NULL;
2351 }
2352 }
2353 pstr->oss.proc_entry = entry;
2354 }
2355}
2356
6ac77bc1 2357static void snd_pcm_oss_proc_done(struct snd_pcm *pcm)
1da177e4
LT		 2358{
2359 int stream;
2360 for (stream = 0; stream < 2; ++stream) {
6ac77bc1 2361 struct snd_pcm_str *pstr = &pcm->streams[stream];
1da177e4
LT		 2362 if (pstr->oss.proc_entry) {
2363 snd_info_unregister(pstr->oss.proc_entry);
2364 pstr->oss.proc_entry = NULL;
2365 snd_pcm_oss_proc_free_setup_list(pstr);
2366 }
2367 }
2368}
04f141a8
TI		 2369#else /* !CONFIG_PROC_FS */
2370#define snd_pcm_oss_proc_init(pcm)
2371#define snd_pcm_oss_proc_done(pcm)
2372#endif /* CONFIG_PROC_FS */
1da177e4
LT		 2373
2374/*
2375 * ENTRY functions
2376 */
2377
2378static struct file_operations snd_pcm_oss_f_reg =
2379{
2380 .owner = THIS_MODULE,
2381 .read = snd_pcm_oss_read,
2382 .write = snd_pcm_oss_write,
2383 .open = snd_pcm_oss_open,
2384 .release = snd_pcm_oss_release,
2385 .poll = snd_pcm_oss_poll,
2386 .unlocked_ioctl = snd_pcm_oss_ioctl,
2387 .compat_ioctl = snd_pcm_oss_ioctl_compat,
2388 .mmap = snd_pcm_oss_mmap,
2389};
2390
6ac77bc1 2391static void register_oss_dsp(struct snd_pcm *pcm, int index)
1da177e4
LT		 2392{
2393 char name[128];
2394 sprintf(name, "dsp%i%i", pcm->card->number, pcm->device);
2395 if (snd_register_oss_device(SNDRV_OSS_DEVICE_TYPE_PCM,
2af677fc 2396 pcm->card, index, &snd_pcm_oss_f_reg,
f87135f5 2397 pcm, name) < 0) {
d3d579f8
TI		 2398 snd_printk(KERN_ERR "unable to register OSS PCM device %i:%i\n",
2399 pcm->card->number, pcm->device);
1da177e4
LT		 2400 }
2401}
2402
6ac77bc1 2403static int snd_pcm_oss_register_minor(struct snd_pcm *pcm)
1da177e4
LT		 2404{
2405 pcm->oss.reg = 0;
2406 if (dsp_map[pcm->card->number] == (int)pcm->device) {
2407 char name[128];
2408 int duplex;
2409 register_oss_dsp(pcm, 0);
2410 duplex = (pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream_count > 0 &&
2411 pcm->streams[SNDRV_PCM_STREAM_CAPTURE].substream_count &&
2412 !(pcm->info_flags & SNDRV_PCM_INFO_HALF_DUPLEX));
2413 sprintf(name, "%s%s", pcm->name, duplex ? " (DUPLEX)" : "");
2414#ifdef SNDRV_OSS_INFO_DEV_AUDIO
2415 snd_oss_info_register(SNDRV_OSS_INFO_DEV_AUDIO,
2416 pcm->card->number,
2417 name);
2418#endif
2419 pcm->oss.reg++;
2420 pcm->oss.reg_mask |= 1;
2421 }
2422 if (adsp_map[pcm->card->number] == (int)pcm->device) {
2423 register_oss_dsp(pcm, 1);
2424 pcm->oss.reg++;
2425 pcm->oss.reg_mask |= 2;
2426 }
2427
2428 if (pcm->oss.reg)
2429 snd_pcm_oss_proc_init(pcm);
2430
2431 return 0;
2432}
2433
6ac77bc1 2434static int snd_pcm_oss_disconnect_minor(struct snd_pcm *pcm)
1da177e4
LT		 2435{
2436 if (pcm->oss.reg) {
2437 if (pcm->oss.reg_mask & 1) {
2438 pcm->oss.reg_mask &= ~1;
2439 snd_unregister_oss_device(SNDRV_OSS_DEVICE_TYPE_PCM,
2440 pcm->card, 0);
2441 }
2442 if (pcm->oss.reg_mask & 2) {
2443 pcm->oss.reg_mask &= ~2;
2444 snd_unregister_oss_device(SNDRV_OSS_DEVICE_TYPE_PCM,
2445 pcm->card, 1);
2446 }
2447 }
2448 return 0;
2449}
2450
6ac77bc1 2451static int snd_pcm_oss_unregister_minor(struct snd_pcm *pcm)
1da177e4
LT		 2452{
2453 snd_pcm_oss_disconnect_minor(pcm);
2454 if (pcm->oss.reg) {
2455 if (dsp_map[pcm->card->number] == (int)pcm->device) {
2456#ifdef SNDRV_OSS_INFO_DEV_AUDIO
2457 snd_oss_info_unregister(SNDRV_OSS_INFO_DEV_AUDIO, pcm->card->number);
2458#endif
2459 }
2460 pcm->oss.reg = 0;
2461 snd_pcm_oss_proc_done(pcm);
2462 }
2463 return 0;
2464}
2465
6ac77bc1 2466static struct snd_pcm_notify snd_pcm_oss_notify =
1da177e4
LT		 2467{
2468 .n_register = snd_pcm_oss_register_minor,
2469 .n_disconnect = snd_pcm_oss_disconnect_minor,
2470 .n_unregister = snd_pcm_oss_unregister_minor,
2471};
2472
2473static int __init alsa_pcm_oss_init(void)
2474{
2475 int i;
2476 int err;
2477
2478 /* check device map table */
2479 for (i = 0; i < SNDRV_CARDS; i++) {
2480 if (dsp_map[i] < 0 || dsp_map[i] >= SNDRV_PCM_DEVICES) {
d3d579f8
TI		 2481 snd_printk(KERN_ERR "invalid dsp_map[%d] = %d\n",
2482 i, dsp_map[i]);
1da177e4
LT		 2483 dsp_map[i] = 0;
2484 }
2485 if (adsp_map[i] < 0 || adsp_map[i] >= SNDRV_PCM_DEVICES) {
d3d579f8
TI		 2486 snd_printk(KERN_ERR "invalid adsp_map[%d] = %d\n",
2487 i, adsp_map[i]);
1da177e4
LT		 2488 adsp_map[i] = 1;
2489 }
2490 }
2491 if ((err = snd_pcm_notify(&snd_pcm_oss_notify, 0)) < 0)
2492 return err;
2493 return 0;
2494}
2495
2496static void __exit alsa_pcm_oss_exit(void)
2497{
2498 snd_pcm_notify(&snd_pcm_oss_notify, 1);
2499}
2500
2501module_init(alsa_pcm_oss_init)
2502module_exit(alsa_pcm_oss_exit)
Linux 6.x block layer and io_uring tree(s)