Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * Digital Audio (PCM) abstract layer |
| 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 | #include <sound/driver.h> |
| 23 | #include <linux/init.h> |
| 24 | #include <linux/slab.h> |
| 25 | #include <linux/time.h> |
| 26 | #include <sound/core.h> |
| 27 | #include <sound/minors.h> |
| 28 | #include <sound/pcm.h> |
| 29 | #include <sound/control.h> |
| 30 | #include <sound/info.h> |
| 31 | |
| 32 | MODULE_AUTHOR("Jaroslav Kysela <perex@suse.cz>, Abramo Bagnara <abramo@alsa-project.org>"); |
| 33 | MODULE_DESCRIPTION("Midlevel PCM code for ALSA."); |
| 34 | MODULE_LICENSE("GPL"); |
| 35 | |
| 36 | snd_pcm_t *snd_pcm_devices[SNDRV_CARDS * SNDRV_PCM_DEVICES]; |
| 37 | static LIST_HEAD(snd_pcm_notify_list); |
| 38 | static DECLARE_MUTEX(register_mutex); |
| 39 | |
| 40 | static int snd_pcm_free(snd_pcm_t *pcm); |
| 41 | static int snd_pcm_dev_free(snd_device_t *device); |
| 42 | static int snd_pcm_dev_register(snd_device_t *device); |
| 43 | static int snd_pcm_dev_disconnect(snd_device_t *device); |
| 44 | static int snd_pcm_dev_unregister(snd_device_t *device); |
| 45 | |
| 46 | static int snd_pcm_control_ioctl(snd_card_t * card, |
| 47 | snd_ctl_file_t * control, |
| 48 | unsigned int cmd, unsigned long arg) |
| 49 | { |
| 50 | unsigned int tmp; |
| 51 | |
| 52 | tmp = card->number * SNDRV_PCM_DEVICES; |
| 53 | switch (cmd) { |
| 54 | case SNDRV_CTL_IOCTL_PCM_NEXT_DEVICE: |
| 55 | { |
| 56 | int device; |
| 57 | |
| 58 | if (get_user(device, (int __user *)arg)) |
| 59 | return -EFAULT; |
| 60 | device = device < 0 ? 0 : device + 1; |
| 61 | while (device < SNDRV_PCM_DEVICES) { |
| 62 | if (snd_pcm_devices[tmp + device]) |
| 63 | break; |
| 64 | device++; |
| 65 | } |
| 66 | if (device == SNDRV_PCM_DEVICES) |
| 67 | device = -1; |
| 68 | if (put_user(device, (int __user *)arg)) |
| 69 | return -EFAULT; |
| 70 | return 0; |
| 71 | } |
| 72 | case SNDRV_CTL_IOCTL_PCM_INFO: |
| 73 | { |
| 74 | snd_pcm_info_t __user *info; |
| 75 | unsigned int device, subdevice; |
| 76 | snd_pcm_stream_t stream; |
| 77 | snd_pcm_t *pcm; |
| 78 | snd_pcm_str_t *pstr; |
| 79 | snd_pcm_substream_t *substream; |
| 80 | info = (snd_pcm_info_t __user *)arg; |
| 81 | if (get_user(device, &info->device)) |
| 82 | return -EFAULT; |
| 83 | if (device >= SNDRV_PCM_DEVICES) |
| 84 | return -ENXIO; |
| 85 | pcm = snd_pcm_devices[tmp + device]; |
| 86 | if (pcm == NULL) |
| 87 | return -ENXIO; |
| 88 | if (get_user(stream, &info->stream)) |
| 89 | return -EFAULT; |
| 90 | if (stream < 0 || stream > 1) |
| 91 | return -EINVAL; |
| 92 | pstr = &pcm->streams[stream]; |
| 93 | if (pstr->substream_count == 0) |
| 94 | return -ENOENT; |
| 95 | if (get_user(subdevice, &info->subdevice)) |
| 96 | return -EFAULT; |
| 97 | if (subdevice >= pstr->substream_count) |
| 98 | return -ENXIO; |
| 99 | for (substream = pstr->substream; substream; substream = substream->next) |
| 100 | if (substream->number == (int)subdevice) |
| 101 | break; |
| 102 | if (substream == NULL) |
| 103 | return -ENXIO; |
| 104 | return snd_pcm_info_user(substream, info); |
| 105 | } |
| 106 | case SNDRV_CTL_IOCTL_PCM_PREFER_SUBDEVICE: |
| 107 | { |
| 108 | int val; |
| 109 | |
| 110 | if (get_user(val, (int __user *)arg)) |
| 111 | return -EFAULT; |
| 112 | control->prefer_pcm_subdevice = val; |
| 113 | return 0; |
| 114 | } |
| 115 | } |
| 116 | return -ENOIOCTLCMD; |
| 117 | } |
| 118 | #define STATE(v) [SNDRV_PCM_STATE_##v] = #v |
| 119 | #define STREAM(v) [SNDRV_PCM_STREAM_##v] = #v |
| 120 | #define READY(v) [SNDRV_PCM_READY_##v] = #v |
| 121 | #define XRUN(v) [SNDRV_PCM_XRUN_##v] = #v |
| 122 | #define SILENCE(v) [SNDRV_PCM_SILENCE_##v] = #v |
| 123 | #define TSTAMP(v) [SNDRV_PCM_TSTAMP_##v] = #v |
| 124 | #define ACCESS(v) [SNDRV_PCM_ACCESS_##v] = #v |
| 125 | #define START(v) [SNDRV_PCM_START_##v] = #v |
| 126 | #define FORMAT(v) [SNDRV_PCM_FORMAT_##v] = #v |
| 127 | #define SUBFORMAT(v) [SNDRV_PCM_SUBFORMAT_##v] = #v |
| 128 | |
| 129 | static char *snd_pcm_stream_names[] = { |
| 130 | STREAM(PLAYBACK), |
| 131 | STREAM(CAPTURE), |
| 132 | }; |
| 133 | |
| 134 | static char *snd_pcm_state_names[] = { |
| 135 | STATE(OPEN), |
| 136 | STATE(SETUP), |
| 137 | STATE(PREPARED), |
| 138 | STATE(RUNNING), |
| 139 | STATE(XRUN), |
| 140 | STATE(DRAINING), |
| 141 | STATE(PAUSED), |
| 142 | STATE(SUSPENDED), |
| 143 | }; |
| 144 | |
| 145 | static char *snd_pcm_access_names[] = { |
| 146 | ACCESS(MMAP_INTERLEAVED), |
| 147 | ACCESS(MMAP_NONINTERLEAVED), |
| 148 | ACCESS(MMAP_COMPLEX), |
| 149 | ACCESS(RW_INTERLEAVED), |
| 150 | ACCESS(RW_NONINTERLEAVED), |
| 151 | }; |
| 152 | |
| 153 | static char *snd_pcm_format_names[] = { |
| 154 | FORMAT(S8), |
| 155 | FORMAT(U8), |
| 156 | FORMAT(S16_LE), |
| 157 | FORMAT(S16_BE), |
| 158 | FORMAT(U16_LE), |
| 159 | FORMAT(U16_BE), |
| 160 | FORMAT(S24_LE), |
| 161 | FORMAT(S24_BE), |
| 162 | FORMAT(U24_LE), |
| 163 | FORMAT(U24_BE), |
| 164 | FORMAT(S32_LE), |
| 165 | FORMAT(S32_BE), |
| 166 | FORMAT(U32_LE), |
| 167 | FORMAT(U32_BE), |
| 168 | FORMAT(FLOAT_LE), |
| 169 | FORMAT(FLOAT_BE), |
| 170 | FORMAT(FLOAT64_LE), |
| 171 | FORMAT(FLOAT64_BE), |
| 172 | FORMAT(IEC958_SUBFRAME_LE), |
| 173 | FORMAT(IEC958_SUBFRAME_BE), |
| 174 | FORMAT(MU_LAW), |
| 175 | FORMAT(A_LAW), |
| 176 | FORMAT(IMA_ADPCM), |
| 177 | FORMAT(MPEG), |
| 178 | FORMAT(GSM), |
| 179 | FORMAT(SPECIAL), |
| 180 | FORMAT(S24_3LE), |
| 181 | FORMAT(S24_3BE), |
| 182 | FORMAT(U24_3LE), |
| 183 | FORMAT(U24_3BE), |
| 184 | FORMAT(S20_3LE), |
| 185 | FORMAT(S20_3BE), |
| 186 | FORMAT(U20_3LE), |
| 187 | FORMAT(U20_3BE), |
| 188 | FORMAT(S18_3LE), |
| 189 | FORMAT(S18_3BE), |
| 190 | FORMAT(U18_3LE), |
| 191 | FORMAT(U18_3BE), |
| 192 | }; |
| 193 | |
| 194 | static char *snd_pcm_subformat_names[] = { |
| 195 | SUBFORMAT(STD), |
| 196 | }; |
| 197 | |
| 198 | static char *snd_pcm_tstamp_mode_names[] = { |
| 199 | TSTAMP(NONE), |
| 200 | TSTAMP(MMAP), |
| 201 | }; |
| 202 | |
| 203 | static const char *snd_pcm_stream_name(snd_pcm_stream_t stream) |
| 204 | { |
| 205 | snd_assert(stream <= SNDRV_PCM_STREAM_LAST, return NULL); |
| 206 | return snd_pcm_stream_names[stream]; |
| 207 | } |
| 208 | |
| 209 | static const char *snd_pcm_access_name(snd_pcm_access_t access) |
| 210 | { |
| 211 | snd_assert(access <= SNDRV_PCM_ACCESS_LAST, return NULL); |
| 212 | return snd_pcm_access_names[access]; |
| 213 | } |
| 214 | |
| 215 | const char *snd_pcm_format_name(snd_pcm_format_t format) |
| 216 | { |
| 217 | snd_assert(format <= SNDRV_PCM_FORMAT_LAST, return NULL); |
| 218 | return snd_pcm_format_names[format]; |
| 219 | } |
| 220 | |
| 221 | static const char *snd_pcm_subformat_name(snd_pcm_subformat_t subformat) |
| 222 | { |
| 223 | snd_assert(subformat <= SNDRV_PCM_SUBFORMAT_LAST, return NULL); |
| 224 | return snd_pcm_subformat_names[subformat]; |
| 225 | } |
| 226 | |
| 227 | static const char *snd_pcm_tstamp_mode_name(snd_pcm_tstamp_t mode) |
| 228 | { |
| 229 | snd_assert(mode <= SNDRV_PCM_TSTAMP_LAST, return NULL); |
| 230 | return snd_pcm_tstamp_mode_names[mode]; |
| 231 | } |
| 232 | |
| 233 | static const char *snd_pcm_state_name(snd_pcm_state_t state) |
| 234 | { |
| 235 | snd_assert(state <= SNDRV_PCM_STATE_LAST, return NULL); |
| 236 | return snd_pcm_state_names[state]; |
| 237 | } |
| 238 | |
| 239 | #if defined(CONFIG_SND_PCM_OSS) || defined(CONFIG_SND_PCM_OSS_MODULE) |
| 240 | #include <linux/soundcard.h> |
| 241 | static const char *snd_pcm_oss_format_name(int format) |
| 242 | { |
| 243 | switch (format) { |
| 244 | case AFMT_MU_LAW: |
| 245 | return "MU_LAW"; |
| 246 | case AFMT_A_LAW: |
| 247 | return "A_LAW"; |
| 248 | case AFMT_IMA_ADPCM: |
| 249 | return "IMA_ADPCM"; |
| 250 | case AFMT_U8: |
| 251 | return "U8"; |
| 252 | case AFMT_S16_LE: |
| 253 | return "S16_LE"; |
| 254 | case AFMT_S16_BE: |
| 255 | return "S16_BE"; |
| 256 | case AFMT_S8: |
| 257 | return "S8"; |
| 258 | case AFMT_U16_LE: |
| 259 | return "U16_LE"; |
| 260 | case AFMT_U16_BE: |
| 261 | return "U16_BE"; |
| 262 | case AFMT_MPEG: |
| 263 | return "MPEG"; |
| 264 | default: |
| 265 | return "unknown"; |
| 266 | } |
| 267 | } |
| 268 | #endif |
| 269 | |
| 270 | #ifdef CONFIG_PROC_FS |
| 271 | static void snd_pcm_proc_info_read(snd_pcm_substream_t *substream, snd_info_buffer_t *buffer) |
| 272 | { |
| 273 | snd_pcm_info_t *info; |
| 274 | int err; |
| 275 | |
| 276 | snd_runtime_check(substream, return); |
| 277 | |
| 278 | info = kmalloc(sizeof(*info), GFP_KERNEL); |
| 279 | if (! info) { |
| 280 | printk(KERN_DEBUG "snd_pcm_proc_info_read: cannot malloc\n"); |
| 281 | return; |
| 282 | } |
| 283 | |
| 284 | err = snd_pcm_info(substream, info); |
| 285 | if (err < 0) { |
| 286 | snd_iprintf(buffer, "error %d\n", err); |
| 287 | kfree(info); |
| 288 | return; |
| 289 | } |
| 290 | snd_iprintf(buffer, "card: %d\n", info->card); |
| 291 | snd_iprintf(buffer, "device: %d\n", info->device); |
| 292 | snd_iprintf(buffer, "subdevice: %d\n", info->subdevice); |
| 293 | snd_iprintf(buffer, "stream: %s\n", snd_pcm_stream_name(info->stream)); |
| 294 | snd_iprintf(buffer, "id: %s\n", info->id); |
| 295 | snd_iprintf(buffer, "name: %s\n", info->name); |
| 296 | snd_iprintf(buffer, "subname: %s\n", info->subname); |
| 297 | snd_iprintf(buffer, "class: %d\n", info->dev_class); |
| 298 | snd_iprintf(buffer, "subclass: %d\n", info->dev_subclass); |
| 299 | snd_iprintf(buffer, "subdevices_count: %d\n", info->subdevices_count); |
| 300 | snd_iprintf(buffer, "subdevices_avail: %d\n", info->subdevices_avail); |
| 301 | kfree(info); |
| 302 | } |
| 303 | |
| 304 | static void snd_pcm_stream_proc_info_read(snd_info_entry_t *entry, snd_info_buffer_t *buffer) |
| 305 | { |
| 306 | snd_pcm_proc_info_read(((snd_pcm_str_t *)entry->private_data)->substream, buffer); |
| 307 | } |
| 308 | |
| 309 | static void snd_pcm_substream_proc_info_read(snd_info_entry_t *entry, snd_info_buffer_t *buffer) |
| 310 | { |
| 311 | snd_pcm_proc_info_read((snd_pcm_substream_t *)entry->private_data, buffer); |
| 312 | } |
| 313 | |
| 314 | static void snd_pcm_substream_proc_hw_params_read(snd_info_entry_t *entry, snd_info_buffer_t *buffer) |
| 315 | { |
| 316 | snd_pcm_substream_t *substream = (snd_pcm_substream_t *)entry->private_data; |
| 317 | snd_pcm_runtime_t *runtime = substream->runtime; |
| 318 | if (!runtime) { |
| 319 | snd_iprintf(buffer, "closed\n"); |
| 320 | return; |
| 321 | } |
| 322 | snd_pcm_stream_lock_irq(substream); |
| 323 | if (runtime->status->state == SNDRV_PCM_STATE_OPEN) { |
| 324 | snd_iprintf(buffer, "no setup\n"); |
| 325 | snd_pcm_stream_unlock_irq(substream); |
| 326 | return; |
| 327 | } |
| 328 | snd_iprintf(buffer, "access: %s\n", snd_pcm_access_name(runtime->access)); |
| 329 | snd_iprintf(buffer, "format: %s\n", snd_pcm_format_name(runtime->format)); |
| 330 | snd_iprintf(buffer, "subformat: %s\n", snd_pcm_subformat_name(runtime->subformat)); |
| 331 | snd_iprintf(buffer, "channels: %u\n", runtime->channels); |
| 332 | snd_iprintf(buffer, "rate: %u (%u/%u)\n", runtime->rate, runtime->rate_num, runtime->rate_den); |
| 333 | snd_iprintf(buffer, "period_size: %lu\n", runtime->period_size); |
| 334 | snd_iprintf(buffer, "buffer_size: %lu\n", runtime->buffer_size); |
| 335 | snd_iprintf(buffer, "tick_time: %u\n", runtime->tick_time); |
| 336 | #if defined(CONFIG_SND_PCM_OSS) || defined(CONFIG_SND_PCM_OSS_MODULE) |
| 337 | if (substream->oss.oss) { |
| 338 | snd_iprintf(buffer, "OSS format: %s\n", snd_pcm_oss_format_name(runtime->oss.format)); |
| 339 | snd_iprintf(buffer, "OSS channels: %u\n", runtime->oss.channels); |
| 340 | snd_iprintf(buffer, "OSS rate: %u\n", runtime->oss.rate); |
| 341 | snd_iprintf(buffer, "OSS period bytes: %lu\n", (unsigned long)runtime->oss.period_bytes); |
| 342 | snd_iprintf(buffer, "OSS periods: %u\n", runtime->oss.periods); |
| 343 | snd_iprintf(buffer, "OSS period frames: %lu\n", (unsigned long)runtime->oss.period_frames); |
| 344 | } |
| 345 | #endif |
| 346 | snd_pcm_stream_unlock_irq(substream); |
| 347 | } |
| 348 | |
| 349 | static void snd_pcm_substream_proc_sw_params_read(snd_info_entry_t *entry, snd_info_buffer_t *buffer) |
| 350 | { |
| 351 | snd_pcm_substream_t *substream = (snd_pcm_substream_t *)entry->private_data; |
| 352 | snd_pcm_runtime_t *runtime = substream->runtime; |
| 353 | if (!runtime) { |
| 354 | snd_iprintf(buffer, "closed\n"); |
| 355 | return; |
| 356 | } |
| 357 | snd_pcm_stream_lock_irq(substream); |
| 358 | if (runtime->status->state == SNDRV_PCM_STATE_OPEN) { |
| 359 | snd_iprintf(buffer, "no setup\n"); |
| 360 | snd_pcm_stream_unlock_irq(substream); |
| 361 | return; |
| 362 | } |
| 363 | snd_iprintf(buffer, "tstamp_mode: %s\n", snd_pcm_tstamp_mode_name(runtime->tstamp_mode)); |
| 364 | snd_iprintf(buffer, "period_step: %u\n", runtime->period_step); |
| 365 | snd_iprintf(buffer, "sleep_min: %u\n", runtime->sleep_min); |
| 366 | snd_iprintf(buffer, "avail_min: %lu\n", runtime->control->avail_min); |
| 367 | snd_iprintf(buffer, "xfer_align: %lu\n", runtime->xfer_align); |
| 368 | snd_iprintf(buffer, "start_threshold: %lu\n", runtime->start_threshold); |
| 369 | snd_iprintf(buffer, "stop_threshold: %lu\n", runtime->stop_threshold); |
| 370 | snd_iprintf(buffer, "silence_threshold: %lu\n", runtime->silence_threshold); |
| 371 | snd_iprintf(buffer, "silence_size: %lu\n", runtime->silence_size); |
| 372 | snd_iprintf(buffer, "boundary: %lu\n", runtime->boundary); |
| 373 | snd_pcm_stream_unlock_irq(substream); |
| 374 | } |
| 375 | |
| 376 | static void snd_pcm_substream_proc_status_read(snd_info_entry_t *entry, snd_info_buffer_t *buffer) |
| 377 | { |
| 378 | snd_pcm_substream_t *substream = (snd_pcm_substream_t *)entry->private_data; |
| 379 | snd_pcm_runtime_t *runtime = substream->runtime; |
| 380 | snd_pcm_status_t status; |
| 381 | int err; |
| 382 | if (!runtime) { |
| 383 | snd_iprintf(buffer, "closed\n"); |
| 384 | return; |
| 385 | } |
| 386 | memset(&status, 0, sizeof(status)); |
| 387 | err = snd_pcm_status(substream, &status); |
| 388 | if (err < 0) { |
| 389 | snd_iprintf(buffer, "error %d\n", err); |
| 390 | return; |
| 391 | } |
| 392 | snd_iprintf(buffer, "state: %s\n", snd_pcm_state_name(status.state)); |
| 393 | snd_iprintf(buffer, "trigger_time: %ld.%09ld\n", |
| 394 | status.trigger_tstamp.tv_sec, status.trigger_tstamp.tv_nsec); |
| 395 | snd_iprintf(buffer, "tstamp : %ld.%09ld\n", |
| 396 | status.tstamp.tv_sec, status.tstamp.tv_nsec); |
| 397 | snd_iprintf(buffer, "delay : %ld\n", status.delay); |
| 398 | snd_iprintf(buffer, "avail : %ld\n", status.avail); |
| 399 | snd_iprintf(buffer, "avail_max : %ld\n", status.avail_max); |
| 400 | snd_iprintf(buffer, "-----\n"); |
| 401 | snd_iprintf(buffer, "hw_ptr : %ld\n", runtime->status->hw_ptr); |
| 402 | snd_iprintf(buffer, "appl_ptr : %ld\n", runtime->control->appl_ptr); |
| 403 | } |
| 404 | #endif |
| 405 | |
| 406 | #ifdef CONFIG_SND_DEBUG |
| 407 | static void snd_pcm_xrun_debug_read(snd_info_entry_t *entry, snd_info_buffer_t *buffer) |
| 408 | { |
| 409 | snd_pcm_str_t *pstr = (snd_pcm_str_t *)entry->private_data; |
| 410 | snd_iprintf(buffer, "%d\n", pstr->xrun_debug); |
| 411 | } |
| 412 | |
| 413 | static void snd_pcm_xrun_debug_write(snd_info_entry_t *entry, snd_info_buffer_t *buffer) |
| 414 | { |
| 415 | snd_pcm_str_t *pstr = (snd_pcm_str_t *)entry->private_data; |
| 416 | char line[64]; |
| 417 | if (!snd_info_get_line(buffer, line, sizeof(line))) |
| 418 | pstr->xrun_debug = simple_strtoul(line, NULL, 10); |
| 419 | } |
| 420 | #endif |
| 421 | |
| 422 | static int snd_pcm_stream_proc_init(snd_pcm_str_t *pstr) |
| 423 | { |
| 424 | snd_pcm_t *pcm = pstr->pcm; |
| 425 | snd_info_entry_t *entry; |
| 426 | char name[16]; |
| 427 | |
| 428 | sprintf(name, "pcm%i%c", pcm->device, |
| 429 | pstr->stream == SNDRV_PCM_STREAM_PLAYBACK ? 'p' : 'c'); |
| 430 | if ((entry = snd_info_create_card_entry(pcm->card, name, pcm->card->proc_root)) == NULL) |
| 431 | return -ENOMEM; |
| 432 | entry->mode = S_IFDIR | S_IRUGO | S_IXUGO; |
| 433 | if (snd_info_register(entry) < 0) { |
| 434 | snd_info_free_entry(entry); |
| 435 | return -ENOMEM; |
| 436 | } |
| 437 | pstr->proc_root = entry; |
| 438 | |
| 439 | if ((entry = snd_info_create_card_entry(pcm->card, "info", pstr->proc_root)) != NULL) { |
| 440 | snd_info_set_text_ops(entry, pstr, 256, snd_pcm_stream_proc_info_read); |
| 441 | if (snd_info_register(entry) < 0) { |
| 442 | snd_info_free_entry(entry); |
| 443 | entry = NULL; |
| 444 | } |
| 445 | } |
| 446 | pstr->proc_info_entry = entry; |
| 447 | |
| 448 | #ifdef CONFIG_SND_DEBUG |
| 449 | if ((entry = snd_info_create_card_entry(pcm->card, "xrun_debug", pstr->proc_root)) != NULL) { |
| 450 | entry->c.text.read_size = 64; |
| 451 | entry->c.text.read = snd_pcm_xrun_debug_read; |
| 452 | entry->c.text.write_size = 64; |
| 453 | entry->c.text.write = snd_pcm_xrun_debug_write; |
Takashi Iwai | bd7bf04 | 2005-04-12 16:27:28 +0200 | [diff] [blame] | 454 | entry->mode |= S_IWUSR; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 455 | entry->private_data = pstr; |
| 456 | if (snd_info_register(entry) < 0) { |
| 457 | snd_info_free_entry(entry); |
| 458 | entry = NULL; |
| 459 | } |
| 460 | } |
| 461 | pstr->proc_xrun_debug_entry = entry; |
| 462 | #endif |
| 463 | return 0; |
| 464 | } |
| 465 | |
| 466 | static int snd_pcm_stream_proc_done(snd_pcm_str_t *pstr) |
| 467 | { |
| 468 | #ifdef CONFIG_SND_DEBUG |
| 469 | if (pstr->proc_xrun_debug_entry) { |
| 470 | snd_info_unregister(pstr->proc_xrun_debug_entry); |
| 471 | pstr->proc_xrun_debug_entry = NULL; |
| 472 | } |
| 473 | #endif |
| 474 | if (pstr->proc_info_entry) { |
| 475 | snd_info_unregister(pstr->proc_info_entry); |
| 476 | pstr->proc_info_entry = NULL; |
| 477 | } |
| 478 | if (pstr->proc_root) { |
| 479 | snd_info_unregister(pstr->proc_root); |
| 480 | pstr->proc_root = NULL; |
| 481 | } |
| 482 | return 0; |
| 483 | } |
| 484 | |
| 485 | static int snd_pcm_substream_proc_init(snd_pcm_substream_t *substream) |
| 486 | { |
| 487 | snd_info_entry_t *entry; |
| 488 | snd_card_t *card; |
| 489 | char name[16]; |
| 490 | |
| 491 | card = substream->pcm->card; |
| 492 | |
| 493 | sprintf(name, "sub%i", substream->number); |
| 494 | if ((entry = snd_info_create_card_entry(card, name, substream->pstr->proc_root)) == NULL) |
| 495 | return -ENOMEM; |
| 496 | entry->mode = S_IFDIR | S_IRUGO | S_IXUGO; |
| 497 | if (snd_info_register(entry) < 0) { |
| 498 | snd_info_free_entry(entry); |
| 499 | return -ENOMEM; |
| 500 | } |
| 501 | substream->proc_root = entry; |
| 502 | |
| 503 | if ((entry = snd_info_create_card_entry(card, "info", substream->proc_root)) != NULL) { |
| 504 | snd_info_set_text_ops(entry, substream, 256, snd_pcm_substream_proc_info_read); |
| 505 | if (snd_info_register(entry) < 0) { |
| 506 | snd_info_free_entry(entry); |
| 507 | entry = NULL; |
| 508 | } |
| 509 | } |
| 510 | substream->proc_info_entry = entry; |
| 511 | |
| 512 | if ((entry = snd_info_create_card_entry(card, "hw_params", substream->proc_root)) != NULL) { |
| 513 | snd_info_set_text_ops(entry, substream, 256, snd_pcm_substream_proc_hw_params_read); |
| 514 | if (snd_info_register(entry) < 0) { |
| 515 | snd_info_free_entry(entry); |
| 516 | entry = NULL; |
| 517 | } |
| 518 | } |
| 519 | substream->proc_hw_params_entry = entry; |
| 520 | |
| 521 | if ((entry = snd_info_create_card_entry(card, "sw_params", substream->proc_root)) != NULL) { |
| 522 | snd_info_set_text_ops(entry, substream, 256, snd_pcm_substream_proc_sw_params_read); |
| 523 | if (snd_info_register(entry) < 0) { |
| 524 | snd_info_free_entry(entry); |
| 525 | entry = NULL; |
| 526 | } |
| 527 | } |
| 528 | substream->proc_sw_params_entry = entry; |
| 529 | |
| 530 | if ((entry = snd_info_create_card_entry(card, "status", substream->proc_root)) != NULL) { |
| 531 | snd_info_set_text_ops(entry, substream, 256, snd_pcm_substream_proc_status_read); |
| 532 | if (snd_info_register(entry) < 0) { |
| 533 | snd_info_free_entry(entry); |
| 534 | entry = NULL; |
| 535 | } |
| 536 | } |
| 537 | substream->proc_status_entry = entry; |
| 538 | |
| 539 | return 0; |
| 540 | } |
| 541 | |
| 542 | static int snd_pcm_substream_proc_done(snd_pcm_substream_t *substream) |
| 543 | { |
| 544 | if (substream->proc_info_entry) { |
| 545 | snd_info_unregister(substream->proc_info_entry); |
| 546 | substream->proc_info_entry = NULL; |
| 547 | } |
| 548 | if (substream->proc_hw_params_entry) { |
| 549 | snd_info_unregister(substream->proc_hw_params_entry); |
| 550 | substream->proc_hw_params_entry = NULL; |
| 551 | } |
| 552 | if (substream->proc_sw_params_entry) { |
| 553 | snd_info_unregister(substream->proc_sw_params_entry); |
| 554 | substream->proc_sw_params_entry = NULL; |
| 555 | } |
| 556 | if (substream->proc_status_entry) { |
| 557 | snd_info_unregister(substream->proc_status_entry); |
| 558 | substream->proc_status_entry = NULL; |
| 559 | } |
| 560 | if (substream->proc_root) { |
| 561 | snd_info_unregister(substream->proc_root); |
| 562 | substream->proc_root = NULL; |
| 563 | } |
| 564 | return 0; |
| 565 | } |
| 566 | |
| 567 | /** |
| 568 | * snd_pcm_new_stream - create a new PCM stream |
| 569 | * @pcm: the pcm instance |
| 570 | * @stream: the stream direction, SNDRV_PCM_STREAM_XXX |
| 571 | * @substream_count: the number of substreams |
| 572 | * |
| 573 | * Creates a new stream for the pcm. |
| 574 | * The corresponding stream on the pcm must have been empty before |
| 575 | * calling this, i.e. zero must be given to the argument of |
| 576 | * snd_pcm_new(). |
| 577 | * |
| 578 | * Returns zero if successful, or a negative error code on failure. |
| 579 | */ |
| 580 | int snd_pcm_new_stream(snd_pcm_t *pcm, int stream, int substream_count) |
| 581 | { |
| 582 | int idx, err; |
| 583 | snd_pcm_str_t *pstr = &pcm->streams[stream]; |
| 584 | snd_pcm_substream_t *substream, *prev; |
| 585 | |
| 586 | #if defined(CONFIG_SND_PCM_OSS) || defined(CONFIG_SND_PCM_OSS_MODULE) |
| 587 | init_MUTEX(&pstr->oss.setup_mutex); |
| 588 | #endif |
| 589 | pstr->stream = stream; |
| 590 | pstr->pcm = pcm; |
| 591 | pstr->substream_count = substream_count; |
| 592 | pstr->reg = &snd_pcm_reg[stream]; |
| 593 | if (substream_count > 0) { |
| 594 | err = snd_pcm_stream_proc_init(pstr); |
| 595 | if (err < 0) |
| 596 | return err; |
| 597 | } |
| 598 | prev = NULL; |
| 599 | for (idx = 0, prev = NULL; idx < substream_count; idx++) { |
Takashi Iwai | ca2c096 | 2005-09-09 14:20:23 +0200 | [diff] [blame^] | 600 | substream = kzalloc(sizeof(*substream), GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 601 | if (substream == NULL) |
| 602 | return -ENOMEM; |
| 603 | substream->pcm = pcm; |
| 604 | substream->pstr = pstr; |
| 605 | substream->number = idx; |
| 606 | substream->stream = stream; |
| 607 | sprintf(substream->name, "subdevice #%i", idx); |
| 608 | substream->buffer_bytes_max = UINT_MAX; |
| 609 | if (prev == NULL) |
| 610 | pstr->substream = substream; |
| 611 | else |
| 612 | prev->next = substream; |
| 613 | err = snd_pcm_substream_proc_init(substream); |
| 614 | if (err < 0) { |
| 615 | kfree(substream); |
| 616 | return err; |
| 617 | } |
| 618 | substream->group = &substream->self_group; |
| 619 | spin_lock_init(&substream->self_group.lock); |
| 620 | INIT_LIST_HEAD(&substream->self_group.substreams); |
| 621 | list_add_tail(&substream->link_list, &substream->self_group.substreams); |
| 622 | spin_lock_init(&substream->timer_lock); |
| 623 | prev = substream; |
| 624 | } |
| 625 | return 0; |
| 626 | } |
| 627 | |
| 628 | /** |
| 629 | * snd_pcm_new - create a new PCM instance |
| 630 | * @card: the card instance |
| 631 | * @id: the id string |
| 632 | * @device: the device index (zero based) |
| 633 | * @playback_count: the number of substreams for playback |
| 634 | * @capture_count: the number of substreams for capture |
| 635 | * @rpcm: the pointer to store the new pcm instance |
| 636 | * |
| 637 | * Creates a new PCM instance. |
| 638 | * |
| 639 | * The pcm operators have to be set afterwards to the new instance |
| 640 | * via snd_pcm_set_ops(). |
| 641 | * |
| 642 | * Returns zero if successful, or a negative error code on failure. |
| 643 | */ |
| 644 | int snd_pcm_new(snd_card_t * card, char *id, int device, |
| 645 | int playback_count, int capture_count, |
| 646 | snd_pcm_t ** rpcm) |
| 647 | { |
| 648 | snd_pcm_t *pcm; |
| 649 | int err; |
| 650 | static snd_device_ops_t ops = { |
| 651 | .dev_free = snd_pcm_dev_free, |
| 652 | .dev_register = snd_pcm_dev_register, |
| 653 | .dev_disconnect = snd_pcm_dev_disconnect, |
| 654 | .dev_unregister = snd_pcm_dev_unregister |
| 655 | }; |
| 656 | |
| 657 | snd_assert(rpcm != NULL, return -EINVAL); |
| 658 | *rpcm = NULL; |
| 659 | snd_assert(card != NULL, return -ENXIO); |
Takashi Iwai | ca2c096 | 2005-09-09 14:20:23 +0200 | [diff] [blame^] | 660 | pcm = kzalloc(sizeof(*pcm), GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 661 | if (pcm == NULL) |
| 662 | return -ENOMEM; |
| 663 | pcm->card = card; |
| 664 | pcm->device = device; |
| 665 | if (id) { |
| 666 | strlcpy(pcm->id, id, sizeof(pcm->id)); |
| 667 | } |
| 668 | if ((err = snd_pcm_new_stream(pcm, SNDRV_PCM_STREAM_PLAYBACK, playback_count)) < 0) { |
| 669 | snd_pcm_free(pcm); |
| 670 | return err; |
| 671 | } |
| 672 | if ((err = snd_pcm_new_stream(pcm, SNDRV_PCM_STREAM_CAPTURE, capture_count)) < 0) { |
| 673 | snd_pcm_free(pcm); |
| 674 | return err; |
| 675 | } |
| 676 | init_MUTEX(&pcm->open_mutex); |
| 677 | init_waitqueue_head(&pcm->open_wait); |
| 678 | if ((err = snd_device_new(card, SNDRV_DEV_PCM, pcm, &ops)) < 0) { |
| 679 | snd_pcm_free(pcm); |
| 680 | return err; |
| 681 | } |
| 682 | *rpcm = pcm; |
| 683 | return 0; |
| 684 | } |
| 685 | |
| 686 | static void snd_pcm_free_stream(snd_pcm_str_t * pstr) |
| 687 | { |
| 688 | snd_pcm_substream_t *substream, *substream_next; |
| 689 | #if defined(CONFIG_SND_PCM_OSS) || defined(CONFIG_SND_PCM_OSS_MODULE) |
| 690 | snd_pcm_oss_setup_t *setup, *setupn; |
| 691 | #endif |
| 692 | substream = pstr->substream; |
| 693 | while (substream) { |
| 694 | substream_next = substream->next; |
| 695 | snd_pcm_substream_proc_done(substream); |
| 696 | kfree(substream); |
| 697 | substream = substream_next; |
| 698 | } |
| 699 | snd_pcm_stream_proc_done(pstr); |
| 700 | #if defined(CONFIG_SND_PCM_OSS) || defined(CONFIG_SND_PCM_OSS_MODULE) |
| 701 | for (setup = pstr->oss.setup_list; setup; setup = setupn) { |
| 702 | setupn = setup->next; |
| 703 | kfree(setup->task_name); |
| 704 | kfree(setup); |
| 705 | } |
| 706 | #endif |
| 707 | } |
| 708 | |
| 709 | static int snd_pcm_free(snd_pcm_t *pcm) |
| 710 | { |
| 711 | snd_assert(pcm != NULL, return -ENXIO); |
| 712 | if (pcm->private_free) |
| 713 | pcm->private_free(pcm); |
| 714 | snd_pcm_lib_preallocate_free_for_all(pcm); |
| 715 | snd_pcm_free_stream(&pcm->streams[SNDRV_PCM_STREAM_PLAYBACK]); |
| 716 | snd_pcm_free_stream(&pcm->streams[SNDRV_PCM_STREAM_CAPTURE]); |
| 717 | kfree(pcm); |
| 718 | return 0; |
| 719 | } |
| 720 | |
| 721 | static int snd_pcm_dev_free(snd_device_t *device) |
| 722 | { |
| 723 | snd_pcm_t *pcm = device->device_data; |
| 724 | return snd_pcm_free(pcm); |
| 725 | } |
| 726 | |
| 727 | static void snd_pcm_tick_timer_func(unsigned long data) |
| 728 | { |
| 729 | snd_pcm_substream_t *substream = (snd_pcm_substream_t*) data; |
| 730 | snd_pcm_tick_elapsed(substream); |
| 731 | } |
| 732 | |
| 733 | int snd_pcm_open_substream(snd_pcm_t *pcm, int stream, |
| 734 | snd_pcm_substream_t **rsubstream) |
| 735 | { |
| 736 | snd_pcm_str_t * pstr; |
| 737 | snd_pcm_substream_t * substream; |
| 738 | snd_pcm_runtime_t * runtime; |
| 739 | snd_ctl_file_t *kctl; |
| 740 | snd_card_t *card; |
| 741 | struct list_head *list; |
| 742 | int prefer_subdevice = -1; |
| 743 | size_t size; |
| 744 | |
| 745 | snd_assert(rsubstream != NULL, return -EINVAL); |
| 746 | *rsubstream = NULL; |
| 747 | snd_assert(pcm != NULL, return -ENXIO); |
| 748 | pstr = &pcm->streams[stream]; |
| 749 | if (pstr->substream == NULL) |
| 750 | return -ENODEV; |
| 751 | |
| 752 | card = pcm->card; |
| 753 | down_read(&card->controls_rwsem); |
| 754 | list_for_each(list, &card->ctl_files) { |
| 755 | kctl = snd_ctl_file(list); |
| 756 | if (kctl->pid == current->pid) { |
| 757 | prefer_subdevice = kctl->prefer_pcm_subdevice; |
| 758 | break; |
| 759 | } |
| 760 | } |
| 761 | up_read(&card->controls_rwsem); |
| 762 | |
| 763 | if (pstr->substream_count == 0) |
| 764 | return -ENODEV; |
| 765 | switch (stream) { |
| 766 | case SNDRV_PCM_STREAM_PLAYBACK: |
| 767 | if (pcm->info_flags & SNDRV_PCM_INFO_HALF_DUPLEX) { |
| 768 | for (substream = pcm->streams[SNDRV_PCM_STREAM_CAPTURE].substream; substream; substream = substream->next) { |
| 769 | if (SUBSTREAM_BUSY(substream)) |
| 770 | return -EAGAIN; |
| 771 | } |
| 772 | } |
| 773 | break; |
| 774 | case SNDRV_PCM_STREAM_CAPTURE: |
| 775 | if (pcm->info_flags & SNDRV_PCM_INFO_HALF_DUPLEX) { |
| 776 | for (substream = pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream; substream; substream = substream->next) { |
| 777 | if (SUBSTREAM_BUSY(substream)) |
| 778 | return -EAGAIN; |
| 779 | } |
| 780 | } |
| 781 | break; |
| 782 | default: |
| 783 | return -EINVAL; |
| 784 | } |
| 785 | |
| 786 | if (prefer_subdevice >= 0) { |
| 787 | for (substream = pstr->substream; substream; substream = substream->next) |
| 788 | if (!SUBSTREAM_BUSY(substream) && substream->number == prefer_subdevice) |
| 789 | goto __ok; |
| 790 | } |
| 791 | for (substream = pstr->substream; substream; substream = substream->next) |
| 792 | if (!SUBSTREAM_BUSY(substream)) |
| 793 | break; |
| 794 | __ok: |
| 795 | if (substream == NULL) |
| 796 | return -EAGAIN; |
| 797 | |
Takashi Iwai | ca2c096 | 2005-09-09 14:20:23 +0200 | [diff] [blame^] | 798 | runtime = kzalloc(sizeof(*runtime), GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 799 | if (runtime == NULL) |
| 800 | return -ENOMEM; |
| 801 | |
| 802 | size = PAGE_ALIGN(sizeof(snd_pcm_mmap_status_t)); |
| 803 | runtime->status = snd_malloc_pages(size, GFP_KERNEL); |
| 804 | if (runtime->status == NULL) { |
| 805 | kfree(runtime); |
| 806 | return -ENOMEM; |
| 807 | } |
| 808 | memset((void*)runtime->status, 0, size); |
| 809 | |
| 810 | size = PAGE_ALIGN(sizeof(snd_pcm_mmap_control_t)); |
| 811 | runtime->control = snd_malloc_pages(size, GFP_KERNEL); |
| 812 | if (runtime->control == NULL) { |
| 813 | snd_free_pages((void*)runtime->status, PAGE_ALIGN(sizeof(snd_pcm_mmap_status_t))); |
| 814 | kfree(runtime); |
| 815 | return -ENOMEM; |
| 816 | } |
| 817 | memset((void*)runtime->control, 0, size); |
| 818 | |
| 819 | init_waitqueue_head(&runtime->sleep); |
| 820 | atomic_set(&runtime->mmap_count, 0); |
| 821 | init_timer(&runtime->tick_timer); |
| 822 | runtime->tick_timer.function = snd_pcm_tick_timer_func; |
| 823 | runtime->tick_timer.data = (unsigned long) substream; |
| 824 | |
| 825 | runtime->status->state = SNDRV_PCM_STATE_OPEN; |
| 826 | |
| 827 | substream->runtime = runtime; |
| 828 | substream->private_data = pcm->private_data; |
| 829 | pstr->substream_opened++; |
| 830 | *rsubstream = substream; |
| 831 | return 0; |
| 832 | } |
| 833 | |
| 834 | void snd_pcm_release_substream(snd_pcm_substream_t *substream) |
| 835 | { |
| 836 | snd_pcm_runtime_t * runtime; |
| 837 | substream->file = NULL; |
| 838 | runtime = substream->runtime; |
| 839 | snd_assert(runtime != NULL, return); |
| 840 | if (runtime->private_free != NULL) |
| 841 | runtime->private_free(runtime); |
| 842 | snd_free_pages((void*)runtime->status, PAGE_ALIGN(sizeof(snd_pcm_mmap_status_t))); |
| 843 | snd_free_pages((void*)runtime->control, PAGE_ALIGN(sizeof(snd_pcm_mmap_control_t))); |
| 844 | kfree(runtime->hw_constraints.rules); |
| 845 | kfree(runtime); |
| 846 | substream->runtime = NULL; |
| 847 | substream->pstr->substream_opened--; |
| 848 | } |
| 849 | |
| 850 | static int snd_pcm_dev_register(snd_device_t *device) |
| 851 | { |
| 852 | int idx, cidx, err; |
| 853 | unsigned short minor; |
| 854 | snd_pcm_substream_t *substream; |
| 855 | struct list_head *list; |
| 856 | char str[16]; |
| 857 | snd_pcm_t *pcm = device->device_data; |
| 858 | |
| 859 | snd_assert(pcm != NULL && device != NULL, return -ENXIO); |
| 860 | down(®ister_mutex); |
| 861 | idx = (pcm->card->number * SNDRV_PCM_DEVICES) + pcm->device; |
| 862 | if (snd_pcm_devices[idx]) { |
| 863 | up(®ister_mutex); |
| 864 | return -EBUSY; |
| 865 | } |
| 866 | snd_pcm_devices[idx] = pcm; |
| 867 | for (cidx = 0; cidx < 2; cidx++) { |
| 868 | int devtype = -1; |
| 869 | if (pcm->streams[cidx].substream == NULL) |
| 870 | continue; |
| 871 | switch (cidx) { |
| 872 | case SNDRV_PCM_STREAM_PLAYBACK: |
| 873 | sprintf(str, "pcmC%iD%ip", pcm->card->number, pcm->device); |
| 874 | minor = SNDRV_MINOR_PCM_PLAYBACK + idx; |
| 875 | devtype = SNDRV_DEVICE_TYPE_PCM_PLAYBACK; |
| 876 | break; |
| 877 | case SNDRV_PCM_STREAM_CAPTURE: |
| 878 | sprintf(str, "pcmC%iD%ic", pcm->card->number, pcm->device); |
| 879 | minor = SNDRV_MINOR_PCM_CAPTURE + idx; |
| 880 | devtype = SNDRV_DEVICE_TYPE_PCM_CAPTURE; |
| 881 | break; |
| 882 | } |
| 883 | if ((err = snd_register_device(devtype, pcm->card, pcm->device, pcm->streams[cidx].reg, str)) < 0) { |
| 884 | snd_pcm_devices[idx] = NULL; |
| 885 | up(®ister_mutex); |
| 886 | return err; |
| 887 | } |
| 888 | for (substream = pcm->streams[cidx].substream; substream; substream = substream->next) |
| 889 | snd_pcm_timer_init(substream); |
| 890 | } |
| 891 | list_for_each(list, &snd_pcm_notify_list) { |
| 892 | snd_pcm_notify_t *notify; |
| 893 | notify = list_entry(list, snd_pcm_notify_t, list); |
| 894 | notify->n_register(pcm); |
| 895 | } |
| 896 | up(®ister_mutex); |
| 897 | return 0; |
| 898 | } |
| 899 | |
| 900 | static int snd_pcm_dev_disconnect(snd_device_t *device) |
| 901 | { |
| 902 | snd_pcm_t *pcm = device->device_data; |
| 903 | struct list_head *list; |
| 904 | snd_pcm_substream_t *substream; |
| 905 | int idx, cidx; |
| 906 | |
| 907 | down(®ister_mutex); |
| 908 | idx = (pcm->card->number * SNDRV_PCM_DEVICES) + pcm->device; |
| 909 | snd_pcm_devices[idx] = NULL; |
| 910 | for (cidx = 0; cidx < 2; cidx++) |
| 911 | for (substream = pcm->streams[cidx].substream; substream; substream = substream->next) |
| 912 | if (substream->runtime) |
| 913 | substream->runtime->status->state = SNDRV_PCM_STATE_DISCONNECTED; |
| 914 | list_for_each(list, &snd_pcm_notify_list) { |
| 915 | snd_pcm_notify_t *notify; |
| 916 | notify = list_entry(list, snd_pcm_notify_t, list); |
| 917 | notify->n_disconnect(pcm); |
| 918 | } |
| 919 | up(®ister_mutex); |
| 920 | return 0; |
| 921 | } |
| 922 | |
| 923 | static int snd_pcm_dev_unregister(snd_device_t *device) |
| 924 | { |
| 925 | int idx, cidx, devtype; |
| 926 | snd_pcm_substream_t *substream; |
| 927 | struct list_head *list; |
| 928 | snd_pcm_t *pcm = device->device_data; |
| 929 | |
| 930 | snd_assert(pcm != NULL, return -ENXIO); |
| 931 | down(®ister_mutex); |
| 932 | idx = (pcm->card->number * SNDRV_PCM_DEVICES) + pcm->device; |
| 933 | snd_pcm_devices[idx] = NULL; |
| 934 | for (cidx = 0; cidx < 2; cidx++) { |
| 935 | devtype = -1; |
| 936 | switch (cidx) { |
| 937 | case SNDRV_PCM_STREAM_PLAYBACK: |
| 938 | devtype = SNDRV_DEVICE_TYPE_PCM_PLAYBACK; |
| 939 | break; |
| 940 | case SNDRV_PCM_STREAM_CAPTURE: |
| 941 | devtype = SNDRV_DEVICE_TYPE_PCM_CAPTURE; |
| 942 | break; |
| 943 | } |
| 944 | snd_unregister_device(devtype, pcm->card, pcm->device); |
| 945 | for (substream = pcm->streams[cidx].substream; substream; substream = substream->next) |
| 946 | snd_pcm_timer_done(substream); |
| 947 | } |
| 948 | list_for_each(list, &snd_pcm_notify_list) { |
| 949 | snd_pcm_notify_t *notify; |
| 950 | notify = list_entry(list, snd_pcm_notify_t, list); |
| 951 | notify->n_unregister(pcm); |
| 952 | } |
| 953 | up(®ister_mutex); |
| 954 | return snd_pcm_free(pcm); |
| 955 | } |
| 956 | |
| 957 | int snd_pcm_notify(snd_pcm_notify_t *notify, int nfree) |
| 958 | { |
| 959 | int idx; |
| 960 | |
| 961 | snd_assert(notify != NULL && notify->n_register != NULL && notify->n_unregister != NULL, return -EINVAL); |
| 962 | down(®ister_mutex); |
| 963 | if (nfree) { |
| 964 | list_del(¬ify->list); |
| 965 | for (idx = 0; idx < SNDRV_CARDS * SNDRV_PCM_DEVICES; idx++) { |
| 966 | if (snd_pcm_devices[idx] == NULL) |
| 967 | continue; |
| 968 | notify->n_unregister(snd_pcm_devices[idx]); |
| 969 | } |
| 970 | } else { |
| 971 | list_add_tail(¬ify->list, &snd_pcm_notify_list); |
| 972 | for (idx = 0; idx < SNDRV_CARDS * SNDRV_PCM_DEVICES; idx++) { |
| 973 | if (snd_pcm_devices[idx] == NULL) |
| 974 | continue; |
| 975 | notify->n_register(snd_pcm_devices[idx]); |
| 976 | } |
| 977 | } |
| 978 | up(®ister_mutex); |
| 979 | return 0; |
| 980 | } |
| 981 | |
| 982 | /* |
| 983 | * Info interface |
| 984 | */ |
| 985 | |
| 986 | static void snd_pcm_proc_read(snd_info_entry_t *entry, snd_info_buffer_t * buffer) |
| 987 | { |
| 988 | int idx; |
| 989 | snd_pcm_t *pcm; |
| 990 | |
| 991 | down(®ister_mutex); |
| 992 | for (idx = 0; idx < SNDRV_CARDS * SNDRV_PCM_DEVICES; idx++) { |
| 993 | pcm = snd_pcm_devices[idx]; |
| 994 | if (pcm == NULL) |
| 995 | continue; |
| 996 | snd_iprintf(buffer, "%02i-%02i: %s : %s", idx / SNDRV_PCM_DEVICES, |
| 997 | idx % SNDRV_PCM_DEVICES, pcm->id, pcm->name); |
| 998 | if (pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream) |
| 999 | snd_iprintf(buffer, " : playback %i", pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream_count); |
| 1000 | if (pcm->streams[SNDRV_PCM_STREAM_CAPTURE].substream) |
| 1001 | snd_iprintf(buffer, " : capture %i", pcm->streams[SNDRV_PCM_STREAM_CAPTURE].substream_count); |
| 1002 | snd_iprintf(buffer, "\n"); |
| 1003 | } |
| 1004 | up(®ister_mutex); |
| 1005 | } |
| 1006 | |
| 1007 | /* |
| 1008 | * ENTRY functions |
| 1009 | */ |
| 1010 | |
| 1011 | static snd_info_entry_t *snd_pcm_proc_entry = NULL; |
| 1012 | |
| 1013 | static int __init alsa_pcm_init(void) |
| 1014 | { |
| 1015 | snd_info_entry_t *entry; |
| 1016 | |
| 1017 | snd_ctl_register_ioctl(snd_pcm_control_ioctl); |
| 1018 | snd_ctl_register_ioctl_compat(snd_pcm_control_ioctl); |
| 1019 | if ((entry = snd_info_create_module_entry(THIS_MODULE, "pcm", NULL)) != NULL) { |
| 1020 | snd_info_set_text_ops(entry, NULL, SNDRV_CARDS * SNDRV_PCM_DEVICES * 128, snd_pcm_proc_read); |
| 1021 | if (snd_info_register(entry) < 0) { |
| 1022 | snd_info_free_entry(entry); |
| 1023 | entry = NULL; |
| 1024 | } |
| 1025 | } |
| 1026 | snd_pcm_proc_entry = entry; |
| 1027 | return 0; |
| 1028 | } |
| 1029 | |
| 1030 | static void __exit alsa_pcm_exit(void) |
| 1031 | { |
| 1032 | snd_ctl_unregister_ioctl(snd_pcm_control_ioctl); |
| 1033 | snd_ctl_unregister_ioctl_compat(snd_pcm_control_ioctl); |
| 1034 | if (snd_pcm_proc_entry) { |
| 1035 | snd_info_unregister(snd_pcm_proc_entry); |
| 1036 | snd_pcm_proc_entry = NULL; |
| 1037 | } |
| 1038 | } |
| 1039 | |
| 1040 | module_init(alsa_pcm_init) |
| 1041 | module_exit(alsa_pcm_exit) |
| 1042 | |
| 1043 | EXPORT_SYMBOL(snd_pcm_devices); |
| 1044 | EXPORT_SYMBOL(snd_pcm_new); |
| 1045 | EXPORT_SYMBOL(snd_pcm_new_stream); |
| 1046 | EXPORT_SYMBOL(snd_pcm_notify); |
| 1047 | EXPORT_SYMBOL(snd_pcm_open_substream); |
| 1048 | EXPORT_SYMBOL(snd_pcm_release_substream); |
| 1049 | EXPORT_SYMBOL(snd_pcm_format_name); |
| 1050 | /* pcm_native.c */ |
| 1051 | EXPORT_SYMBOL(snd_pcm_link_rwlock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1052 | #ifdef CONFIG_PM |
| 1053 | EXPORT_SYMBOL(snd_pcm_suspend); |
| 1054 | EXPORT_SYMBOL(snd_pcm_suspend_all); |
| 1055 | #endif |
| 1056 | EXPORT_SYMBOL(snd_pcm_kernel_playback_ioctl); |
| 1057 | EXPORT_SYMBOL(snd_pcm_kernel_capture_ioctl); |
| 1058 | EXPORT_SYMBOL(snd_pcm_kernel_ioctl); |
| 1059 | EXPORT_SYMBOL(snd_pcm_mmap_data); |
| 1060 | #if SNDRV_PCM_INFO_MMAP_IOMEM |
| 1061 | EXPORT_SYMBOL(snd_pcm_lib_mmap_iomem); |
| 1062 | #endif |
| 1063 | /* pcm_misc.c */ |
| 1064 | EXPORT_SYMBOL(snd_pcm_format_signed); |
| 1065 | EXPORT_SYMBOL(snd_pcm_format_unsigned); |
| 1066 | EXPORT_SYMBOL(snd_pcm_format_linear); |
| 1067 | EXPORT_SYMBOL(snd_pcm_format_little_endian); |
| 1068 | EXPORT_SYMBOL(snd_pcm_format_big_endian); |
| 1069 | EXPORT_SYMBOL(snd_pcm_format_width); |
| 1070 | EXPORT_SYMBOL(snd_pcm_format_physical_width); |
Takashi Iwai | 9502dca | 2005-05-18 16:25:46 +0200 | [diff] [blame] | 1071 | EXPORT_SYMBOL(snd_pcm_format_size); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1072 | EXPORT_SYMBOL(snd_pcm_format_silence_64); |
| 1073 | EXPORT_SYMBOL(snd_pcm_format_set_silence); |
| 1074 | EXPORT_SYMBOL(snd_pcm_build_linear_format); |
| 1075 | EXPORT_SYMBOL(snd_pcm_limit_hw_rates); |