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