Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * Digital Audio (PCM) abstract layer |
Jaroslav Kysela | c1017a4 | 2007-10-15 09:50:19 +0200 | [diff] [blame] | 3 | * Copyright (c) by Jaroslav Kysela <perex@perex.cz> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 22 | #include <linux/init.h> |
| 23 | #include <linux/slab.h> |
| 24 | #include <linux/time.h> |
Ingo Molnar | 1a60d4c | 2006-01-16 16:29:08 +0100 | [diff] [blame] | 25 | #include <linux/mutex.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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 | |
Jaroslav Kysela | c1017a4 | 2007-10-15 09:50:19 +0200 | [diff] [blame] | 32 | MODULE_AUTHOR("Jaroslav Kysela <perex@perex.cz>, Abramo Bagnara <abramo@alsa-project.org>"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 33 | MODULE_DESCRIPTION("Midlevel PCM code for ALSA."); |
| 34 | MODULE_LICENSE("GPL"); |
| 35 | |
Clemens Ladisch | f87135f | 2005-11-20 14:06:59 +0100 | [diff] [blame] | 36 | static LIST_HEAD(snd_pcm_devices); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 37 | static LIST_HEAD(snd_pcm_notify_list); |
Ingo Molnar | 1a60d4c | 2006-01-16 16:29:08 +0100 | [diff] [blame] | 38 | static DEFINE_MUTEX(register_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 39 | |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 40 | static int snd_pcm_free(struct snd_pcm *pcm); |
| 41 | static int snd_pcm_dev_free(struct snd_device *device); |
| 42 | static int snd_pcm_dev_register(struct snd_device *device); |
| 43 | static int snd_pcm_dev_disconnect(struct snd_device *device); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 44 | |
Pawel MOLL | f90c06a | 2008-07-30 12:46:40 +0100 | [diff] [blame] | 45 | static struct snd_pcm *snd_pcm_get(struct snd_card *card, int device) |
Clemens Ladisch | f87135f | 2005-11-20 14:06:59 +0100 | [diff] [blame] | 46 | { |
Clemens Ladisch | f87135f | 2005-11-20 14:06:59 +0100 | [diff] [blame] | 47 | struct snd_pcm *pcm; |
| 48 | |
Johannes Berg | 9244b2c | 2006-10-05 16:02:22 +0200 | [diff] [blame] | 49 | list_for_each_entry(pcm, &snd_pcm_devices, list) { |
Clemens Ladisch | f87135f | 2005-11-20 14:06:59 +0100 | [diff] [blame] | 50 | if (pcm->card == card && pcm->device == device) |
| 51 | return pcm; |
| 52 | } |
| 53 | return NULL; |
| 54 | } |
| 55 | |
Pawel MOLL | f90c06a | 2008-07-30 12:46:40 +0100 | [diff] [blame] | 56 | static int snd_pcm_next(struct snd_card *card, int device) |
| 57 | { |
| 58 | struct snd_pcm *pcm; |
| 59 | |
| 60 | list_for_each_entry(pcm, &snd_pcm_devices, list) { |
| 61 | if (pcm->card == card && pcm->device > device) |
| 62 | return pcm->device; |
| 63 | else if (pcm->card->number > card->number) |
| 64 | return -1; |
| 65 | } |
| 66 | return -1; |
| 67 | } |
| 68 | |
| 69 | static int snd_pcm_add(struct snd_pcm *newpcm) |
| 70 | { |
| 71 | struct snd_pcm *pcm; |
| 72 | |
| 73 | list_for_each_entry(pcm, &snd_pcm_devices, list) { |
| 74 | if (pcm->card == newpcm->card && pcm->device == newpcm->device) |
| 75 | return -EBUSY; |
| 76 | if (pcm->card->number > newpcm->card->number || |
| 77 | (pcm->card == newpcm->card && |
| 78 | pcm->device > newpcm->device)) { |
| 79 | list_add(&newpcm->list, pcm->list.prev); |
| 80 | return 0; |
| 81 | } |
| 82 | } |
| 83 | list_add_tail(&newpcm->list, &snd_pcm_devices); |
| 84 | return 0; |
| 85 | } |
| 86 | |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 87 | static int snd_pcm_control_ioctl(struct snd_card *card, |
| 88 | struct snd_ctl_file *control, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 89 | unsigned int cmd, unsigned long arg) |
| 90 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 91 | switch (cmd) { |
| 92 | case SNDRV_CTL_IOCTL_PCM_NEXT_DEVICE: |
| 93 | { |
| 94 | int device; |
| 95 | |
| 96 | if (get_user(device, (int __user *)arg)) |
| 97 | return -EFAULT; |
Ingo Molnar | 1a60d4c | 2006-01-16 16:29:08 +0100 | [diff] [blame] | 98 | mutex_lock(®ister_mutex); |
Pawel MOLL | f90c06a | 2008-07-30 12:46:40 +0100 | [diff] [blame] | 99 | device = snd_pcm_next(card, device); |
Ingo Molnar | 1a60d4c | 2006-01-16 16:29:08 +0100 | [diff] [blame] | 100 | mutex_unlock(®ister_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 101 | if (put_user(device, (int __user *)arg)) |
| 102 | return -EFAULT; |
| 103 | return 0; |
| 104 | } |
| 105 | case SNDRV_CTL_IOCTL_PCM_INFO: |
| 106 | { |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 107 | struct snd_pcm_info __user *info; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 108 | unsigned int device, subdevice; |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 109 | int stream; |
| 110 | struct snd_pcm *pcm; |
| 111 | struct snd_pcm_str *pstr; |
| 112 | struct snd_pcm_substream *substream; |
Clemens Ladisch | f87135f | 2005-11-20 14:06:59 +0100 | [diff] [blame] | 113 | int err; |
| 114 | |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 115 | info = (struct snd_pcm_info __user *)arg; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 116 | if (get_user(device, &info->device)) |
| 117 | return -EFAULT; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 118 | if (get_user(stream, &info->stream)) |
| 119 | return -EFAULT; |
| 120 | if (stream < 0 || stream > 1) |
| 121 | return -EINVAL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 122 | if (get_user(subdevice, &info->subdevice)) |
| 123 | return -EFAULT; |
Ingo Molnar | 1a60d4c | 2006-01-16 16:29:08 +0100 | [diff] [blame] | 124 | mutex_lock(®ister_mutex); |
Pawel MOLL | f90c06a | 2008-07-30 12:46:40 +0100 | [diff] [blame] | 125 | pcm = snd_pcm_get(card, device); |
Clemens Ladisch | f87135f | 2005-11-20 14:06:59 +0100 | [diff] [blame] | 126 | if (pcm == NULL) { |
| 127 | err = -ENXIO; |
| 128 | goto _error; |
| 129 | } |
| 130 | pstr = &pcm->streams[stream]; |
| 131 | if (pstr->substream_count == 0) { |
| 132 | err = -ENOENT; |
| 133 | goto _error; |
| 134 | } |
| 135 | if (subdevice >= pstr->substream_count) { |
| 136 | err = -ENXIO; |
| 137 | goto _error; |
| 138 | } |
| 139 | for (substream = pstr->substream; substream; |
| 140 | substream = substream->next) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 141 | if (substream->number == (int)subdevice) |
| 142 | break; |
Clemens Ladisch | f87135f | 2005-11-20 14:06:59 +0100 | [diff] [blame] | 143 | if (substream == NULL) { |
| 144 | err = -ENXIO; |
| 145 | goto _error; |
| 146 | } |
| 147 | err = snd_pcm_info_user(substream, info); |
| 148 | _error: |
Ingo Molnar | 1a60d4c | 2006-01-16 16:29:08 +0100 | [diff] [blame] | 149 | mutex_unlock(®ister_mutex); |
Clemens Ladisch | f87135f | 2005-11-20 14:06:59 +0100 | [diff] [blame] | 150 | return err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 151 | } |
| 152 | case SNDRV_CTL_IOCTL_PCM_PREFER_SUBDEVICE: |
| 153 | { |
| 154 | int val; |
| 155 | |
| 156 | if (get_user(val, (int __user *)arg)) |
| 157 | return -EFAULT; |
| 158 | control->prefer_pcm_subdevice = val; |
| 159 | return 0; |
| 160 | } |
| 161 | } |
| 162 | return -ENOIOCTLCMD; |
| 163 | } |
Jaroslav Kysela | 21a3479 | 2006-01-13 09:12:11 +0100 | [diff] [blame] | 164 | |
Takashi Iwai | b7d90a3 | 2006-04-25 12:56:04 +0200 | [diff] [blame] | 165 | #ifdef CONFIG_SND_VERBOSE_PROCFS |
Jaroslav Kysela | 21a3479 | 2006-01-13 09:12:11 +0100 | [diff] [blame] | 166 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 167 | #define STATE(v) [SNDRV_PCM_STATE_##v] = #v |
| 168 | #define STREAM(v) [SNDRV_PCM_STREAM_##v] = #v |
| 169 | #define READY(v) [SNDRV_PCM_READY_##v] = #v |
| 170 | #define XRUN(v) [SNDRV_PCM_XRUN_##v] = #v |
| 171 | #define SILENCE(v) [SNDRV_PCM_SILENCE_##v] = #v |
| 172 | #define TSTAMP(v) [SNDRV_PCM_TSTAMP_##v] = #v |
| 173 | #define ACCESS(v) [SNDRV_PCM_ACCESS_##v] = #v |
| 174 | #define START(v) [SNDRV_PCM_START_##v] = #v |
| 175 | #define FORMAT(v) [SNDRV_PCM_FORMAT_##v] = #v |
| 176 | #define SUBFORMAT(v) [SNDRV_PCM_SUBFORMAT_##v] = #v |
| 177 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 178 | static char *snd_pcm_format_names[] = { |
| 179 | FORMAT(S8), |
| 180 | FORMAT(U8), |
| 181 | FORMAT(S16_LE), |
| 182 | FORMAT(S16_BE), |
| 183 | FORMAT(U16_LE), |
| 184 | FORMAT(U16_BE), |
| 185 | FORMAT(S24_LE), |
| 186 | FORMAT(S24_BE), |
| 187 | FORMAT(U24_LE), |
| 188 | FORMAT(U24_BE), |
| 189 | FORMAT(S32_LE), |
| 190 | FORMAT(S32_BE), |
| 191 | FORMAT(U32_LE), |
| 192 | FORMAT(U32_BE), |
| 193 | FORMAT(FLOAT_LE), |
| 194 | FORMAT(FLOAT_BE), |
| 195 | FORMAT(FLOAT64_LE), |
| 196 | FORMAT(FLOAT64_BE), |
| 197 | FORMAT(IEC958_SUBFRAME_LE), |
| 198 | FORMAT(IEC958_SUBFRAME_BE), |
| 199 | FORMAT(MU_LAW), |
| 200 | FORMAT(A_LAW), |
| 201 | FORMAT(IMA_ADPCM), |
| 202 | FORMAT(MPEG), |
| 203 | FORMAT(GSM), |
| 204 | FORMAT(SPECIAL), |
| 205 | FORMAT(S24_3LE), |
| 206 | FORMAT(S24_3BE), |
| 207 | FORMAT(U24_3LE), |
| 208 | FORMAT(U24_3BE), |
| 209 | FORMAT(S20_3LE), |
| 210 | FORMAT(S20_3BE), |
| 211 | FORMAT(U20_3LE), |
| 212 | FORMAT(U20_3BE), |
| 213 | FORMAT(S18_3LE), |
| 214 | FORMAT(S18_3BE), |
| 215 | FORMAT(U18_3LE), |
| 216 | FORMAT(U18_3BE), |
| 217 | }; |
| 218 | |
Adrian Bunk | 12831c1 | 2006-04-11 11:12:46 +0200 | [diff] [blame] | 219 | static const char *snd_pcm_format_name(snd_pcm_format_t format) |
Takashi Iwai | e28563c | 2005-12-01 10:42:42 +0100 | [diff] [blame] | 220 | { |
| 221 | return snd_pcm_format_names[format]; |
| 222 | } |
| 223 | |
Takashi Iwai | e28563c | 2005-12-01 10:42:42 +0100 | [diff] [blame] | 224 | static char *snd_pcm_stream_names[] = { |
| 225 | STREAM(PLAYBACK), |
| 226 | STREAM(CAPTURE), |
| 227 | }; |
| 228 | |
| 229 | static char *snd_pcm_state_names[] = { |
| 230 | STATE(OPEN), |
| 231 | STATE(SETUP), |
| 232 | STATE(PREPARED), |
| 233 | STATE(RUNNING), |
| 234 | STATE(XRUN), |
| 235 | STATE(DRAINING), |
| 236 | STATE(PAUSED), |
| 237 | STATE(SUSPENDED), |
| 238 | }; |
| 239 | |
| 240 | static char *snd_pcm_access_names[] = { |
| 241 | ACCESS(MMAP_INTERLEAVED), |
| 242 | ACCESS(MMAP_NONINTERLEAVED), |
| 243 | ACCESS(MMAP_COMPLEX), |
| 244 | ACCESS(RW_INTERLEAVED), |
| 245 | ACCESS(RW_NONINTERLEAVED), |
| 246 | }; |
| 247 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 248 | static char *snd_pcm_subformat_names[] = { |
| 249 | SUBFORMAT(STD), |
| 250 | }; |
| 251 | |
| 252 | static char *snd_pcm_tstamp_mode_names[] = { |
| 253 | TSTAMP(NONE), |
Jaroslav Kysela | 8c12158 | 2008-01-11 08:45:08 +0100 | [diff] [blame] | 254 | TSTAMP(ENABLE), |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 255 | }; |
| 256 | |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 257 | static const char *snd_pcm_stream_name(int stream) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 258 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 259 | return snd_pcm_stream_names[stream]; |
| 260 | } |
| 261 | |
| 262 | static const char *snd_pcm_access_name(snd_pcm_access_t access) |
| 263 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 264 | return snd_pcm_access_names[access]; |
| 265 | } |
| 266 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 267 | static const char *snd_pcm_subformat_name(snd_pcm_subformat_t subformat) |
| 268 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 269 | return snd_pcm_subformat_names[subformat]; |
| 270 | } |
| 271 | |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 272 | static const char *snd_pcm_tstamp_mode_name(int mode) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 273 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 274 | return snd_pcm_tstamp_mode_names[mode]; |
| 275 | } |
| 276 | |
| 277 | static const char *snd_pcm_state_name(snd_pcm_state_t state) |
| 278 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 279 | return snd_pcm_state_names[state]; |
| 280 | } |
| 281 | |
| 282 | #if defined(CONFIG_SND_PCM_OSS) || defined(CONFIG_SND_PCM_OSS_MODULE) |
| 283 | #include <linux/soundcard.h> |
Ingo Molnar | 1a60d4c | 2006-01-16 16:29:08 +0100 | [diff] [blame] | 284 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 285 | static const char *snd_pcm_oss_format_name(int format) |
| 286 | { |
| 287 | switch (format) { |
| 288 | case AFMT_MU_LAW: |
| 289 | return "MU_LAW"; |
| 290 | case AFMT_A_LAW: |
| 291 | return "A_LAW"; |
| 292 | case AFMT_IMA_ADPCM: |
| 293 | return "IMA_ADPCM"; |
| 294 | case AFMT_U8: |
| 295 | return "U8"; |
| 296 | case AFMT_S16_LE: |
| 297 | return "S16_LE"; |
| 298 | case AFMT_S16_BE: |
| 299 | return "S16_BE"; |
| 300 | case AFMT_S8: |
| 301 | return "S8"; |
| 302 | case AFMT_U16_LE: |
| 303 | return "U16_LE"; |
| 304 | case AFMT_U16_BE: |
| 305 | return "U16_BE"; |
| 306 | case AFMT_MPEG: |
| 307 | return "MPEG"; |
| 308 | default: |
| 309 | return "unknown"; |
| 310 | } |
| 311 | } |
| 312 | #endif |
| 313 | |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 314 | static void snd_pcm_proc_info_read(struct snd_pcm_substream *substream, |
| 315 | struct snd_info_buffer *buffer) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 316 | { |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 317 | struct snd_pcm_info *info; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 318 | int err; |
| 319 | |
Takashi Iwai | 7c22f1a | 2005-10-10 11:46:31 +0200 | [diff] [blame] | 320 | if (! substream) |
| 321 | return; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 322 | |
| 323 | info = kmalloc(sizeof(*info), GFP_KERNEL); |
| 324 | if (! info) { |
| 325 | printk(KERN_DEBUG "snd_pcm_proc_info_read: cannot malloc\n"); |
| 326 | return; |
| 327 | } |
| 328 | |
| 329 | err = snd_pcm_info(substream, info); |
| 330 | if (err < 0) { |
| 331 | snd_iprintf(buffer, "error %d\n", err); |
| 332 | kfree(info); |
| 333 | return; |
| 334 | } |
| 335 | snd_iprintf(buffer, "card: %d\n", info->card); |
| 336 | snd_iprintf(buffer, "device: %d\n", info->device); |
| 337 | snd_iprintf(buffer, "subdevice: %d\n", info->subdevice); |
| 338 | snd_iprintf(buffer, "stream: %s\n", snd_pcm_stream_name(info->stream)); |
| 339 | snd_iprintf(buffer, "id: %s\n", info->id); |
| 340 | snd_iprintf(buffer, "name: %s\n", info->name); |
| 341 | snd_iprintf(buffer, "subname: %s\n", info->subname); |
| 342 | snd_iprintf(buffer, "class: %d\n", info->dev_class); |
| 343 | snd_iprintf(buffer, "subclass: %d\n", info->dev_subclass); |
| 344 | snd_iprintf(buffer, "subdevices_count: %d\n", info->subdevices_count); |
| 345 | snd_iprintf(buffer, "subdevices_avail: %d\n", info->subdevices_avail); |
| 346 | kfree(info); |
| 347 | } |
| 348 | |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 349 | static void snd_pcm_stream_proc_info_read(struct snd_info_entry *entry, |
| 350 | struct snd_info_buffer *buffer) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 351 | { |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 352 | snd_pcm_proc_info_read(((struct snd_pcm_str *)entry->private_data)->substream, |
| 353 | buffer); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 354 | } |
| 355 | |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 356 | static void snd_pcm_substream_proc_info_read(struct snd_info_entry *entry, |
| 357 | struct snd_info_buffer *buffer) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 358 | { |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 359 | snd_pcm_proc_info_read((struct snd_pcm_substream *)entry->private_data, |
| 360 | buffer); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 361 | } |
| 362 | |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 363 | static void snd_pcm_substream_proc_hw_params_read(struct snd_info_entry *entry, |
| 364 | struct snd_info_buffer *buffer) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 365 | { |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 366 | struct snd_pcm_substream *substream = entry->private_data; |
| 367 | struct snd_pcm_runtime *runtime = substream->runtime; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 368 | if (!runtime) { |
| 369 | snd_iprintf(buffer, "closed\n"); |
| 370 | return; |
| 371 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 372 | if (runtime->status->state == SNDRV_PCM_STATE_OPEN) { |
| 373 | snd_iprintf(buffer, "no setup\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 374 | return; |
| 375 | } |
| 376 | snd_iprintf(buffer, "access: %s\n", snd_pcm_access_name(runtime->access)); |
| 377 | snd_iprintf(buffer, "format: %s\n", snd_pcm_format_name(runtime->format)); |
| 378 | snd_iprintf(buffer, "subformat: %s\n", snd_pcm_subformat_name(runtime->subformat)); |
| 379 | snd_iprintf(buffer, "channels: %u\n", runtime->channels); |
| 380 | snd_iprintf(buffer, "rate: %u (%u/%u)\n", runtime->rate, runtime->rate_num, runtime->rate_den); |
| 381 | snd_iprintf(buffer, "period_size: %lu\n", runtime->period_size); |
| 382 | snd_iprintf(buffer, "buffer_size: %lu\n", runtime->buffer_size); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 383 | #if defined(CONFIG_SND_PCM_OSS) || defined(CONFIG_SND_PCM_OSS_MODULE) |
| 384 | if (substream->oss.oss) { |
| 385 | snd_iprintf(buffer, "OSS format: %s\n", snd_pcm_oss_format_name(runtime->oss.format)); |
| 386 | snd_iprintf(buffer, "OSS channels: %u\n", runtime->oss.channels); |
| 387 | snd_iprintf(buffer, "OSS rate: %u\n", runtime->oss.rate); |
| 388 | snd_iprintf(buffer, "OSS period bytes: %lu\n", (unsigned long)runtime->oss.period_bytes); |
| 389 | snd_iprintf(buffer, "OSS periods: %u\n", runtime->oss.periods); |
| 390 | snd_iprintf(buffer, "OSS period frames: %lu\n", (unsigned long)runtime->oss.period_frames); |
| 391 | } |
| 392 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 393 | } |
| 394 | |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 395 | static void snd_pcm_substream_proc_sw_params_read(struct snd_info_entry *entry, |
| 396 | struct snd_info_buffer *buffer) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 397 | { |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 398 | struct snd_pcm_substream *substream = entry->private_data; |
| 399 | struct snd_pcm_runtime *runtime = substream->runtime; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 400 | if (!runtime) { |
| 401 | snd_iprintf(buffer, "closed\n"); |
| 402 | return; |
| 403 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 404 | if (runtime->status->state == SNDRV_PCM_STATE_OPEN) { |
| 405 | snd_iprintf(buffer, "no setup\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 406 | return; |
| 407 | } |
| 408 | snd_iprintf(buffer, "tstamp_mode: %s\n", snd_pcm_tstamp_mode_name(runtime->tstamp_mode)); |
| 409 | snd_iprintf(buffer, "period_step: %u\n", runtime->period_step); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 410 | snd_iprintf(buffer, "avail_min: %lu\n", runtime->control->avail_min); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 411 | snd_iprintf(buffer, "start_threshold: %lu\n", runtime->start_threshold); |
| 412 | snd_iprintf(buffer, "stop_threshold: %lu\n", runtime->stop_threshold); |
| 413 | snd_iprintf(buffer, "silence_threshold: %lu\n", runtime->silence_threshold); |
| 414 | snd_iprintf(buffer, "silence_size: %lu\n", runtime->silence_size); |
| 415 | snd_iprintf(buffer, "boundary: %lu\n", runtime->boundary); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 416 | } |
| 417 | |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 418 | static void snd_pcm_substream_proc_status_read(struct snd_info_entry *entry, |
| 419 | struct snd_info_buffer *buffer) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 420 | { |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 421 | struct snd_pcm_substream *substream = entry->private_data; |
| 422 | struct snd_pcm_runtime *runtime = substream->runtime; |
| 423 | struct snd_pcm_status status; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 424 | int err; |
| 425 | if (!runtime) { |
| 426 | snd_iprintf(buffer, "closed\n"); |
| 427 | return; |
| 428 | } |
| 429 | memset(&status, 0, sizeof(status)); |
| 430 | err = snd_pcm_status(substream, &status); |
| 431 | if (err < 0) { |
| 432 | snd_iprintf(buffer, "error %d\n", err); |
| 433 | return; |
| 434 | } |
| 435 | snd_iprintf(buffer, "state: %s\n", snd_pcm_state_name(status.state)); |
| 436 | snd_iprintf(buffer, "trigger_time: %ld.%09ld\n", |
| 437 | status.trigger_tstamp.tv_sec, status.trigger_tstamp.tv_nsec); |
| 438 | snd_iprintf(buffer, "tstamp : %ld.%09ld\n", |
| 439 | status.tstamp.tv_sec, status.tstamp.tv_nsec); |
| 440 | snd_iprintf(buffer, "delay : %ld\n", status.delay); |
| 441 | snd_iprintf(buffer, "avail : %ld\n", status.avail); |
| 442 | snd_iprintf(buffer, "avail_max : %ld\n", status.avail_max); |
| 443 | snd_iprintf(buffer, "-----\n"); |
| 444 | snd_iprintf(buffer, "hw_ptr : %ld\n", runtime->status->hw_ptr); |
| 445 | snd_iprintf(buffer, "appl_ptr : %ld\n", runtime->control->appl_ptr); |
| 446 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 447 | |
Jaroslav Kysela | 61fb63c | 2006-04-24 21:57:16 +0200 | [diff] [blame] | 448 | #ifdef CONFIG_SND_PCM_XRUN_DEBUG |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 449 | static void snd_pcm_xrun_debug_read(struct snd_info_entry *entry, |
| 450 | struct snd_info_buffer *buffer) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 451 | { |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 452 | struct snd_pcm_str *pstr = entry->private_data; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 453 | snd_iprintf(buffer, "%d\n", pstr->xrun_debug); |
| 454 | } |
| 455 | |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 456 | static void snd_pcm_xrun_debug_write(struct snd_info_entry *entry, |
| 457 | struct snd_info_buffer *buffer) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 458 | { |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 459 | struct snd_pcm_str *pstr = entry->private_data; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 460 | char line[64]; |
| 461 | if (!snd_info_get_line(buffer, line, sizeof(line))) |
| 462 | pstr->xrun_debug = simple_strtoul(line, NULL, 10); |
| 463 | } |
| 464 | #endif |
| 465 | |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 466 | static int snd_pcm_stream_proc_init(struct snd_pcm_str *pstr) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 467 | { |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 468 | struct snd_pcm *pcm = pstr->pcm; |
| 469 | struct snd_info_entry *entry; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 470 | char name[16]; |
| 471 | |
| 472 | sprintf(name, "pcm%i%c", pcm->device, |
| 473 | pstr->stream == SNDRV_PCM_STREAM_PLAYBACK ? 'p' : 'c'); |
| 474 | if ((entry = snd_info_create_card_entry(pcm->card, name, pcm->card->proc_root)) == NULL) |
| 475 | return -ENOMEM; |
| 476 | entry->mode = S_IFDIR | S_IRUGO | S_IXUGO; |
| 477 | if (snd_info_register(entry) < 0) { |
| 478 | snd_info_free_entry(entry); |
| 479 | return -ENOMEM; |
| 480 | } |
| 481 | pstr->proc_root = entry; |
| 482 | |
| 483 | if ((entry = snd_info_create_card_entry(pcm->card, "info", pstr->proc_root)) != NULL) { |
Takashi Iwai | bf85020 | 2006-04-28 15:13:41 +0200 | [diff] [blame] | 484 | snd_info_set_text_ops(entry, pstr, snd_pcm_stream_proc_info_read); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 485 | if (snd_info_register(entry) < 0) { |
| 486 | snd_info_free_entry(entry); |
| 487 | entry = NULL; |
| 488 | } |
| 489 | } |
| 490 | pstr->proc_info_entry = entry; |
| 491 | |
Jaroslav Kysela | 61fb63c | 2006-04-24 21:57:16 +0200 | [diff] [blame] | 492 | #ifdef CONFIG_SND_PCM_XRUN_DEBUG |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 493 | if ((entry = snd_info_create_card_entry(pcm->card, "xrun_debug", |
| 494 | pstr->proc_root)) != NULL) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 495 | entry->c.text.read = snd_pcm_xrun_debug_read; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 496 | entry->c.text.write = snd_pcm_xrun_debug_write; |
Takashi Iwai | bd7bf04 | 2005-04-12 16:27:28 +0200 | [diff] [blame] | 497 | entry->mode |= S_IWUSR; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 498 | entry->private_data = pstr; |
| 499 | if (snd_info_register(entry) < 0) { |
| 500 | snd_info_free_entry(entry); |
| 501 | entry = NULL; |
| 502 | } |
| 503 | } |
| 504 | pstr->proc_xrun_debug_entry = entry; |
| 505 | #endif |
| 506 | return 0; |
| 507 | } |
| 508 | |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 509 | static int snd_pcm_stream_proc_done(struct snd_pcm_str *pstr) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 510 | { |
Jaroslav Kysela | 61fb63c | 2006-04-24 21:57:16 +0200 | [diff] [blame] | 511 | #ifdef CONFIG_SND_PCM_XRUN_DEBUG |
Takashi Iwai | 746d4a0 | 2006-06-23 14:37:59 +0200 | [diff] [blame] | 512 | snd_info_free_entry(pstr->proc_xrun_debug_entry); |
| 513 | pstr->proc_xrun_debug_entry = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 514 | #endif |
Takashi Iwai | 746d4a0 | 2006-06-23 14:37:59 +0200 | [diff] [blame] | 515 | snd_info_free_entry(pstr->proc_info_entry); |
| 516 | pstr->proc_info_entry = NULL; |
| 517 | snd_info_free_entry(pstr->proc_root); |
| 518 | pstr->proc_root = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 519 | return 0; |
| 520 | } |
| 521 | |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 522 | static int snd_pcm_substream_proc_init(struct snd_pcm_substream *substream) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 523 | { |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 524 | struct snd_info_entry *entry; |
| 525 | struct snd_card *card; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 526 | char name[16]; |
| 527 | |
| 528 | card = substream->pcm->card; |
| 529 | |
| 530 | sprintf(name, "sub%i", substream->number); |
| 531 | if ((entry = snd_info_create_card_entry(card, name, substream->pstr->proc_root)) == NULL) |
| 532 | return -ENOMEM; |
| 533 | entry->mode = S_IFDIR | S_IRUGO | S_IXUGO; |
| 534 | if (snd_info_register(entry) < 0) { |
| 535 | snd_info_free_entry(entry); |
| 536 | return -ENOMEM; |
| 537 | } |
| 538 | substream->proc_root = entry; |
| 539 | |
| 540 | if ((entry = snd_info_create_card_entry(card, "info", substream->proc_root)) != NULL) { |
Takashi Iwai | bf85020 | 2006-04-28 15:13:41 +0200 | [diff] [blame] | 541 | snd_info_set_text_ops(entry, substream, |
| 542 | snd_pcm_substream_proc_info_read); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 543 | if (snd_info_register(entry) < 0) { |
| 544 | snd_info_free_entry(entry); |
| 545 | entry = NULL; |
| 546 | } |
| 547 | } |
| 548 | substream->proc_info_entry = entry; |
| 549 | |
| 550 | if ((entry = snd_info_create_card_entry(card, "hw_params", substream->proc_root)) != NULL) { |
Takashi Iwai | bf85020 | 2006-04-28 15:13:41 +0200 | [diff] [blame] | 551 | snd_info_set_text_ops(entry, substream, |
| 552 | snd_pcm_substream_proc_hw_params_read); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 553 | if (snd_info_register(entry) < 0) { |
| 554 | snd_info_free_entry(entry); |
| 555 | entry = NULL; |
| 556 | } |
| 557 | } |
| 558 | substream->proc_hw_params_entry = entry; |
| 559 | |
| 560 | if ((entry = snd_info_create_card_entry(card, "sw_params", substream->proc_root)) != NULL) { |
Takashi Iwai | bf85020 | 2006-04-28 15:13:41 +0200 | [diff] [blame] | 561 | snd_info_set_text_ops(entry, substream, |
| 562 | snd_pcm_substream_proc_sw_params_read); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 563 | if (snd_info_register(entry) < 0) { |
| 564 | snd_info_free_entry(entry); |
| 565 | entry = NULL; |
| 566 | } |
| 567 | } |
| 568 | substream->proc_sw_params_entry = entry; |
| 569 | |
| 570 | if ((entry = snd_info_create_card_entry(card, "status", substream->proc_root)) != NULL) { |
Takashi Iwai | bf85020 | 2006-04-28 15:13:41 +0200 | [diff] [blame] | 571 | snd_info_set_text_ops(entry, substream, |
| 572 | snd_pcm_substream_proc_status_read); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 573 | if (snd_info_register(entry) < 0) { |
| 574 | snd_info_free_entry(entry); |
| 575 | entry = NULL; |
| 576 | } |
| 577 | } |
| 578 | substream->proc_status_entry = entry; |
| 579 | |
| 580 | return 0; |
| 581 | } |
Takashi Iwai | 746d4a0 | 2006-06-23 14:37:59 +0200 | [diff] [blame] | 582 | |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 583 | static int snd_pcm_substream_proc_done(struct snd_pcm_substream *substream) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 584 | { |
Takashi Iwai | 746d4a0 | 2006-06-23 14:37:59 +0200 | [diff] [blame] | 585 | snd_info_free_entry(substream->proc_info_entry); |
| 586 | substream->proc_info_entry = NULL; |
| 587 | snd_info_free_entry(substream->proc_hw_params_entry); |
| 588 | substream->proc_hw_params_entry = NULL; |
| 589 | snd_info_free_entry(substream->proc_sw_params_entry); |
| 590 | substream->proc_sw_params_entry = NULL; |
| 591 | snd_info_free_entry(substream->proc_status_entry); |
| 592 | substream->proc_status_entry = NULL; |
| 593 | snd_info_free_entry(substream->proc_root); |
| 594 | substream->proc_root = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 595 | return 0; |
| 596 | } |
Takashi Iwai | b7d90a3 | 2006-04-25 12:56:04 +0200 | [diff] [blame] | 597 | #else /* !CONFIG_SND_VERBOSE_PROCFS */ |
Takashi Iwai | e28563c | 2005-12-01 10:42:42 +0100 | [diff] [blame] | 598 | static inline int snd_pcm_stream_proc_init(struct snd_pcm_str *pstr) { return 0; } |
| 599 | static inline int snd_pcm_stream_proc_done(struct snd_pcm_str *pstr) { return 0; } |
| 600 | static inline int snd_pcm_substream_proc_init(struct snd_pcm_substream *substream) { return 0; } |
| 601 | static inline int snd_pcm_substream_proc_done(struct snd_pcm_substream *substream) { return 0; } |
Takashi Iwai | b7d90a3 | 2006-04-25 12:56:04 +0200 | [diff] [blame] | 602 | #endif /* CONFIG_SND_VERBOSE_PROCFS */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 603 | |
| 604 | /** |
| 605 | * snd_pcm_new_stream - create a new PCM stream |
| 606 | * @pcm: the pcm instance |
| 607 | * @stream: the stream direction, SNDRV_PCM_STREAM_XXX |
| 608 | * @substream_count: the number of substreams |
| 609 | * |
| 610 | * Creates a new stream for the pcm. |
| 611 | * The corresponding stream on the pcm must have been empty before |
| 612 | * calling this, i.e. zero must be given to the argument of |
| 613 | * snd_pcm_new(). |
| 614 | * |
| 615 | * Returns zero if successful, or a negative error code on failure. |
| 616 | */ |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 617 | int snd_pcm_new_stream(struct snd_pcm *pcm, int stream, int substream_count) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 618 | { |
| 619 | int idx, err; |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 620 | struct snd_pcm_str *pstr = &pcm->streams[stream]; |
| 621 | struct snd_pcm_substream *substream, *prev; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 622 | |
| 623 | #if defined(CONFIG_SND_PCM_OSS) || defined(CONFIG_SND_PCM_OSS_MODULE) |
Ingo Molnar | 1a60d4c | 2006-01-16 16:29:08 +0100 | [diff] [blame] | 624 | mutex_init(&pstr->oss.setup_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 625 | #endif |
| 626 | pstr->stream = stream; |
| 627 | pstr->pcm = pcm; |
| 628 | pstr->substream_count = substream_count; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 629 | if (substream_count > 0) { |
| 630 | err = snd_pcm_stream_proc_init(pstr); |
Takashi Iwai | 73e77ba | 2005-11-17 17:44:01 +0100 | [diff] [blame] | 631 | if (err < 0) { |
| 632 | snd_printk(KERN_ERR "Error in snd_pcm_stream_proc_init\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 633 | return err; |
Takashi Iwai | 73e77ba | 2005-11-17 17:44:01 +0100 | [diff] [blame] | 634 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 635 | } |
| 636 | prev = NULL; |
| 637 | for (idx = 0, prev = NULL; idx < substream_count; idx++) { |
Takashi Iwai | ca2c096 | 2005-09-09 14:20:23 +0200 | [diff] [blame] | 638 | substream = kzalloc(sizeof(*substream), GFP_KERNEL); |
Takashi Iwai | 73e77ba | 2005-11-17 17:44:01 +0100 | [diff] [blame] | 639 | if (substream == NULL) { |
| 640 | snd_printk(KERN_ERR "Cannot allocate PCM substream\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 641 | return -ENOMEM; |
Takashi Iwai | 73e77ba | 2005-11-17 17:44:01 +0100 | [diff] [blame] | 642 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 643 | substream->pcm = pcm; |
| 644 | substream->pstr = pstr; |
| 645 | substream->number = idx; |
| 646 | substream->stream = stream; |
| 647 | sprintf(substream->name, "subdevice #%i", idx); |
Takashi Iwai | 9442e69 | 2006-09-30 23:27:19 -0700 | [diff] [blame] | 648 | snprintf(substream->latency_id, sizeof(substream->latency_id), |
| 649 | "ALSA-PCM%d-%d%c%d", pcm->card->number, pcm->device, |
| 650 | (stream ? 'c' : 'p'), idx); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 651 | substream->buffer_bytes_max = UINT_MAX; |
| 652 | if (prev == NULL) |
| 653 | pstr->substream = substream; |
| 654 | else |
| 655 | prev->next = substream; |
| 656 | err = snd_pcm_substream_proc_init(substream); |
| 657 | if (err < 0) { |
Takashi Iwai | 73e77ba | 2005-11-17 17:44:01 +0100 | [diff] [blame] | 658 | snd_printk(KERN_ERR "Error in snd_pcm_stream_proc_init\n"); |
Akinobu Mita | 4d36128 | 2006-11-23 12:03:24 +0100 | [diff] [blame] | 659 | if (prev == NULL) |
| 660 | pstr->substream = NULL; |
| 661 | else |
| 662 | prev->next = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 663 | kfree(substream); |
| 664 | return err; |
| 665 | } |
| 666 | substream->group = &substream->self_group; |
| 667 | spin_lock_init(&substream->self_group.lock); |
| 668 | INIT_LIST_HEAD(&substream->self_group.substreams); |
| 669 | list_add_tail(&substream->link_list, &substream->self_group.substreams); |
Takashi Iwai | 9c323fc | 2006-04-28 15:13:41 +0200 | [diff] [blame] | 670 | atomic_set(&substream->mmap_count, 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 671 | prev = substream; |
| 672 | } |
| 673 | return 0; |
| 674 | } |
| 675 | |
Takashi Iwai | e88e8ae6 | 2006-04-28 15:13:40 +0200 | [diff] [blame] | 676 | EXPORT_SYMBOL(snd_pcm_new_stream); |
| 677 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 678 | /** |
| 679 | * snd_pcm_new - create a new PCM instance |
| 680 | * @card: the card instance |
| 681 | * @id: the id string |
| 682 | * @device: the device index (zero based) |
| 683 | * @playback_count: the number of substreams for playback |
| 684 | * @capture_count: the number of substreams for capture |
| 685 | * @rpcm: the pointer to store the new pcm instance |
| 686 | * |
| 687 | * Creates a new PCM instance. |
| 688 | * |
| 689 | * The pcm operators have to be set afterwards to the new instance |
| 690 | * via snd_pcm_set_ops(). |
| 691 | * |
| 692 | * Returns zero if successful, or a negative error code on failure. |
| 693 | */ |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 694 | int snd_pcm_new(struct snd_card *card, char *id, int device, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 695 | int playback_count, int capture_count, |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 696 | struct snd_pcm ** rpcm) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 697 | { |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 698 | struct snd_pcm *pcm; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 699 | int err; |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 700 | static struct snd_device_ops ops = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 701 | .dev_free = snd_pcm_dev_free, |
| 702 | .dev_register = snd_pcm_dev_register, |
| 703 | .dev_disconnect = snd_pcm_dev_disconnect, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 704 | }; |
| 705 | |
Takashi Iwai | 7eaa943 | 2008-08-08 17:09:09 +0200 | [diff] [blame] | 706 | if (snd_BUG_ON(!card)) |
| 707 | return -ENXIO; |
| 708 | if (rpcm) |
| 709 | *rpcm = NULL; |
Takashi Iwai | ca2c096 | 2005-09-09 14:20:23 +0200 | [diff] [blame] | 710 | pcm = kzalloc(sizeof(*pcm), GFP_KERNEL); |
Takashi Iwai | 73e77ba | 2005-11-17 17:44:01 +0100 | [diff] [blame] | 711 | if (pcm == NULL) { |
| 712 | snd_printk(KERN_ERR "Cannot allocate PCM\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 713 | return -ENOMEM; |
Takashi Iwai | 73e77ba | 2005-11-17 17:44:01 +0100 | [diff] [blame] | 714 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 715 | pcm->card = card; |
| 716 | pcm->device = device; |
Takashi Iwai | 73e77ba | 2005-11-17 17:44:01 +0100 | [diff] [blame] | 717 | if (id) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 718 | strlcpy(pcm->id, id, sizeof(pcm->id)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 719 | if ((err = snd_pcm_new_stream(pcm, SNDRV_PCM_STREAM_PLAYBACK, playback_count)) < 0) { |
| 720 | snd_pcm_free(pcm); |
| 721 | return err; |
| 722 | } |
| 723 | if ((err = snd_pcm_new_stream(pcm, SNDRV_PCM_STREAM_CAPTURE, capture_count)) < 0) { |
| 724 | snd_pcm_free(pcm); |
| 725 | return err; |
| 726 | } |
Ingo Molnar | 1a60d4c | 2006-01-16 16:29:08 +0100 | [diff] [blame] | 727 | mutex_init(&pcm->open_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 728 | init_waitqueue_head(&pcm->open_wait); |
| 729 | if ((err = snd_device_new(card, SNDRV_DEV_PCM, pcm, &ops)) < 0) { |
| 730 | snd_pcm_free(pcm); |
| 731 | return err; |
| 732 | } |
Takashi Iwai | 7eaa943 | 2008-08-08 17:09:09 +0200 | [diff] [blame] | 733 | if (rpcm) |
| 734 | *rpcm = pcm; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 735 | return 0; |
| 736 | } |
| 737 | |
Takashi Iwai | e88e8ae6 | 2006-04-28 15:13:40 +0200 | [diff] [blame] | 738 | EXPORT_SYMBOL(snd_pcm_new); |
| 739 | |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 740 | static void snd_pcm_free_stream(struct snd_pcm_str * pstr) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 741 | { |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 742 | struct snd_pcm_substream *substream, *substream_next; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 743 | #if defined(CONFIG_SND_PCM_OSS) || defined(CONFIG_SND_PCM_OSS_MODULE) |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 744 | struct snd_pcm_oss_setup *setup, *setupn; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 745 | #endif |
| 746 | substream = pstr->substream; |
| 747 | while (substream) { |
| 748 | substream_next = substream->next; |
Takashi Iwai | c461482 | 2006-06-23 14:38:23 +0200 | [diff] [blame] | 749 | snd_pcm_timer_done(substream); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 750 | snd_pcm_substream_proc_done(substream); |
| 751 | kfree(substream); |
| 752 | substream = substream_next; |
| 753 | } |
| 754 | snd_pcm_stream_proc_done(pstr); |
| 755 | #if defined(CONFIG_SND_PCM_OSS) || defined(CONFIG_SND_PCM_OSS_MODULE) |
| 756 | for (setup = pstr->oss.setup_list; setup; setup = setupn) { |
| 757 | setupn = setup->next; |
| 758 | kfree(setup->task_name); |
| 759 | kfree(setup); |
| 760 | } |
| 761 | #endif |
| 762 | } |
| 763 | |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 764 | static int snd_pcm_free(struct snd_pcm *pcm) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 765 | { |
Takashi Iwai | c461482 | 2006-06-23 14:38:23 +0200 | [diff] [blame] | 766 | struct snd_pcm_notify *notify; |
| 767 | |
Takashi Iwai | 7eaa943 | 2008-08-08 17:09:09 +0200 | [diff] [blame] | 768 | if (!pcm) |
| 769 | return 0; |
Takashi Iwai | c461482 | 2006-06-23 14:38:23 +0200 | [diff] [blame] | 770 | list_for_each_entry(notify, &snd_pcm_notify_list, list) { |
| 771 | notify->n_unregister(pcm); |
| 772 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 773 | if (pcm->private_free) |
| 774 | pcm->private_free(pcm); |
| 775 | snd_pcm_lib_preallocate_free_for_all(pcm); |
| 776 | snd_pcm_free_stream(&pcm->streams[SNDRV_PCM_STREAM_PLAYBACK]); |
| 777 | snd_pcm_free_stream(&pcm->streams[SNDRV_PCM_STREAM_CAPTURE]); |
| 778 | kfree(pcm); |
| 779 | return 0; |
| 780 | } |
| 781 | |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 782 | static int snd_pcm_dev_free(struct snd_device *device) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 783 | { |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 784 | struct snd_pcm *pcm = device->device_data; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 785 | return snd_pcm_free(pcm); |
| 786 | } |
| 787 | |
Takashi Iwai | 3bf75f9 | 2006-03-27 16:40:49 +0200 | [diff] [blame] | 788 | int snd_pcm_attach_substream(struct snd_pcm *pcm, int stream, |
| 789 | struct file *file, |
| 790 | struct snd_pcm_substream **rsubstream) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 791 | { |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 792 | struct snd_pcm_str * pstr; |
| 793 | struct snd_pcm_substream *substream; |
| 794 | struct snd_pcm_runtime *runtime; |
| 795 | struct snd_ctl_file *kctl; |
| 796 | struct snd_card *card; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 797 | int prefer_subdevice = -1; |
| 798 | size_t size; |
| 799 | |
Takashi Iwai | 7eaa943 | 2008-08-08 17:09:09 +0200 | [diff] [blame] | 800 | if (snd_BUG_ON(!pcm || !rsubstream)) |
| 801 | return -ENXIO; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 802 | *rsubstream = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 803 | pstr = &pcm->streams[stream]; |
Takashi Iwai | 3bf75f9 | 2006-03-27 16:40:49 +0200 | [diff] [blame] | 804 | if (pstr->substream == NULL || pstr->substream_count == 0) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 805 | return -ENODEV; |
| 806 | |
| 807 | card = pcm->card; |
Takashi Iwai | 399ccdc | 2008-09-25 14:51:03 +0200 | [diff] [blame] | 808 | read_lock(&card->ctl_files_rwlock); |
Johannes Berg | 9244b2c | 2006-10-05 16:02:22 +0200 | [diff] [blame] | 809 | list_for_each_entry(kctl, &card->ctl_files, list) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 810 | if (kctl->pid == current->pid) { |
| 811 | prefer_subdevice = kctl->prefer_pcm_subdevice; |
Takashi Iwai | 2529bba | 2006-08-04 12:57:19 +0200 | [diff] [blame] | 812 | if (prefer_subdevice != -1) |
| 813 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 814 | } |
| 815 | } |
Takashi Iwai | 399ccdc | 2008-09-25 14:51:03 +0200 | [diff] [blame] | 816 | read_unlock(&card->ctl_files_rwlock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 817 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 818 | switch (stream) { |
| 819 | case SNDRV_PCM_STREAM_PLAYBACK: |
| 820 | if (pcm->info_flags & SNDRV_PCM_INFO_HALF_DUPLEX) { |
| 821 | for (substream = pcm->streams[SNDRV_PCM_STREAM_CAPTURE].substream; substream; substream = substream->next) { |
| 822 | if (SUBSTREAM_BUSY(substream)) |
| 823 | return -EAGAIN; |
| 824 | } |
| 825 | } |
| 826 | break; |
| 827 | case SNDRV_PCM_STREAM_CAPTURE: |
| 828 | if (pcm->info_flags & SNDRV_PCM_INFO_HALF_DUPLEX) { |
| 829 | for (substream = pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream; substream; substream = substream->next) { |
| 830 | if (SUBSTREAM_BUSY(substream)) |
| 831 | return -EAGAIN; |
| 832 | } |
| 833 | } |
| 834 | break; |
| 835 | default: |
| 836 | return -EINVAL; |
| 837 | } |
| 838 | |
Takashi Iwai | 0df63e4 | 2006-04-28 15:13:41 +0200 | [diff] [blame] | 839 | if (file->f_flags & O_APPEND) { |
| 840 | if (prefer_subdevice < 0) { |
| 841 | if (pstr->substream_count > 1) |
| 842 | return -EINVAL; /* must be unique */ |
| 843 | substream = pstr->substream; |
| 844 | } else { |
| 845 | for (substream = pstr->substream; substream; |
| 846 | substream = substream->next) |
| 847 | if (substream->number == prefer_subdevice) |
| 848 | break; |
| 849 | } |
| 850 | if (! substream) |
| 851 | return -ENODEV; |
| 852 | if (! SUBSTREAM_BUSY(substream)) |
| 853 | return -EBADFD; |
| 854 | substream->ref_count++; |
| 855 | *rsubstream = substream; |
| 856 | return 0; |
| 857 | } |
| 858 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 859 | if (prefer_subdevice >= 0) { |
| 860 | for (substream = pstr->substream; substream; substream = substream->next) |
| 861 | if (!SUBSTREAM_BUSY(substream) && substream->number == prefer_subdevice) |
| 862 | goto __ok; |
| 863 | } |
| 864 | for (substream = pstr->substream; substream; substream = substream->next) |
| 865 | if (!SUBSTREAM_BUSY(substream)) |
| 866 | break; |
| 867 | __ok: |
| 868 | if (substream == NULL) |
| 869 | return -EAGAIN; |
| 870 | |
Takashi Iwai | ca2c096 | 2005-09-09 14:20:23 +0200 | [diff] [blame] | 871 | runtime = kzalloc(sizeof(*runtime), GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 872 | if (runtime == NULL) |
| 873 | return -ENOMEM; |
| 874 | |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 875 | size = PAGE_ALIGN(sizeof(struct snd_pcm_mmap_status)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 876 | runtime->status = snd_malloc_pages(size, GFP_KERNEL); |
| 877 | if (runtime->status == NULL) { |
| 878 | kfree(runtime); |
| 879 | return -ENOMEM; |
| 880 | } |
| 881 | memset((void*)runtime->status, 0, size); |
| 882 | |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 883 | size = PAGE_ALIGN(sizeof(struct snd_pcm_mmap_control)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 884 | runtime->control = snd_malloc_pages(size, GFP_KERNEL); |
| 885 | if (runtime->control == NULL) { |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 886 | snd_free_pages((void*)runtime->status, |
| 887 | PAGE_ALIGN(sizeof(struct snd_pcm_mmap_status))); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 888 | kfree(runtime); |
| 889 | return -ENOMEM; |
| 890 | } |
| 891 | memset((void*)runtime->control, 0, size); |
| 892 | |
| 893 | init_waitqueue_head(&runtime->sleep); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 894 | |
| 895 | runtime->status->state = SNDRV_PCM_STATE_OPEN; |
| 896 | |
| 897 | substream->runtime = runtime; |
| 898 | substream->private_data = pcm->private_data; |
Takashi Iwai | 0df63e4 | 2006-04-28 15:13:41 +0200 | [diff] [blame] | 899 | substream->ref_count = 1; |
| 900 | substream->f_flags = file->f_flags; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 901 | pstr->substream_opened++; |
| 902 | *rsubstream = substream; |
| 903 | return 0; |
| 904 | } |
| 905 | |
Takashi Iwai | 3bf75f9 | 2006-03-27 16:40:49 +0200 | [diff] [blame] | 906 | void snd_pcm_detach_substream(struct snd_pcm_substream *substream) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 907 | { |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 908 | struct snd_pcm_runtime *runtime; |
Takashi Iwai | 0df63e4 | 2006-04-28 15:13:41 +0200 | [diff] [blame] | 909 | |
Takashi Iwai | 7eaa943 | 2008-08-08 17:09:09 +0200 | [diff] [blame] | 910 | if (PCM_RUNTIME_CHECK(substream)) |
| 911 | return; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 912 | runtime = substream->runtime; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 913 | if (runtime->private_free != NULL) |
| 914 | runtime->private_free(runtime); |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 915 | snd_free_pages((void*)runtime->status, |
| 916 | PAGE_ALIGN(sizeof(struct snd_pcm_mmap_status))); |
| 917 | snd_free_pages((void*)runtime->control, |
| 918 | PAGE_ALIGN(sizeof(struct snd_pcm_mmap_control))); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 919 | kfree(runtime->hw_constraints.rules); |
| 920 | kfree(runtime); |
| 921 | substream->runtime = NULL; |
| 922 | substream->pstr->substream_opened--; |
| 923 | } |
| 924 | |
Greg Kroah-Hartman | d80f19f | 2006-08-07 22:19:37 -0700 | [diff] [blame] | 925 | static ssize_t show_pcm_class(struct device *dev, |
| 926 | struct device_attribute *attr, char *buf) |
Takashi Iwai | 9d19f48 | 2006-09-06 14:27:46 +0200 | [diff] [blame] | 927 | { |
| 928 | struct snd_pcm *pcm; |
| 929 | const char *str; |
| 930 | static const char *strs[SNDRV_PCM_CLASS_LAST + 1] = { |
| 931 | [SNDRV_PCM_CLASS_GENERIC] = "generic", |
| 932 | [SNDRV_PCM_CLASS_MULTI] = "multi", |
| 933 | [SNDRV_PCM_CLASS_MODEM] = "modem", |
| 934 | [SNDRV_PCM_CLASS_DIGITIZER] = "digitizer", |
| 935 | }; |
| 936 | |
Greg Kroah-Hartman | d80f19f | 2006-08-07 22:19:37 -0700 | [diff] [blame] | 937 | if (! (pcm = dev_get_drvdata(dev)) || |
Takashi Iwai | 9d19f48 | 2006-09-06 14:27:46 +0200 | [diff] [blame] | 938 | pcm->dev_class > SNDRV_PCM_CLASS_LAST) |
| 939 | str = "none"; |
| 940 | else |
| 941 | str = strs[pcm->dev_class]; |
| 942 | return snprintf(buf, PAGE_SIZE, "%s\n", str); |
| 943 | } |
| 944 | |
Greg Kroah-Hartman | d80f19f | 2006-08-07 22:19:37 -0700 | [diff] [blame] | 945 | static struct device_attribute pcm_attrs = |
Takashi Iwai | 9d19f48 | 2006-09-06 14:27:46 +0200 | [diff] [blame] | 946 | __ATTR(pcm_class, S_IRUGO, show_pcm_class, NULL); |
| 947 | |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 948 | static int snd_pcm_dev_register(struct snd_device *device) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 949 | { |
Clemens Ladisch | f87135f | 2005-11-20 14:06:59 +0100 | [diff] [blame] | 950 | int cidx, err; |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 951 | struct snd_pcm_substream *substream; |
Johannes Berg | 9244b2c | 2006-10-05 16:02:22 +0200 | [diff] [blame] | 952 | struct snd_pcm_notify *notify; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 953 | char str[16]; |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 954 | struct snd_pcm *pcm = device->device_data; |
Johannes Berg | c78085f | 2006-10-05 15:06:34 +0200 | [diff] [blame] | 955 | struct device *dev; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 956 | |
Takashi Iwai | 7eaa943 | 2008-08-08 17:09:09 +0200 | [diff] [blame] | 957 | if (snd_BUG_ON(!pcm || !device)) |
| 958 | return -ENXIO; |
Ingo Molnar | 1a60d4c | 2006-01-16 16:29:08 +0100 | [diff] [blame] | 959 | mutex_lock(®ister_mutex); |
Pawel MOLL | f90c06a | 2008-07-30 12:46:40 +0100 | [diff] [blame] | 960 | err = snd_pcm_add(pcm); |
| 961 | if (err) { |
Ingo Molnar | 1a60d4c | 2006-01-16 16:29:08 +0100 | [diff] [blame] | 962 | mutex_unlock(®ister_mutex); |
Pawel MOLL | f90c06a | 2008-07-30 12:46:40 +0100 | [diff] [blame] | 963 | return err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 964 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 965 | for (cidx = 0; cidx < 2; cidx++) { |
| 966 | int devtype = -1; |
| 967 | if (pcm->streams[cidx].substream == NULL) |
| 968 | continue; |
| 969 | switch (cidx) { |
| 970 | case SNDRV_PCM_STREAM_PLAYBACK: |
| 971 | sprintf(str, "pcmC%iD%ip", pcm->card->number, pcm->device); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 972 | devtype = SNDRV_DEVICE_TYPE_PCM_PLAYBACK; |
| 973 | break; |
| 974 | case SNDRV_PCM_STREAM_CAPTURE: |
| 975 | sprintf(str, "pcmC%iD%ic", pcm->card->number, pcm->device); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 976 | devtype = SNDRV_DEVICE_TYPE_PCM_CAPTURE; |
| 977 | break; |
| 978 | } |
Johannes Berg | c78085f | 2006-10-05 15:06:34 +0200 | [diff] [blame] | 979 | /* device pointer to use, pcm->dev takes precedence if |
| 980 | * it is assigned, otherwise fall back to card's device |
| 981 | * if possible */ |
| 982 | dev = pcm->dev; |
| 983 | if (!dev) |
Takashi Iwai | c2902c8 | 2007-02-09 16:25:48 +0100 | [diff] [blame] | 984 | dev = snd_card_get_device_link(pcm->card); |
Johannes Berg | c78085f | 2006-10-05 15:06:34 +0200 | [diff] [blame] | 985 | /* register pcm */ |
| 986 | err = snd_register_device_for_dev(devtype, pcm->card, |
| 987 | pcm->device, |
| 988 | &snd_pcm_f_ops[cidx], |
| 989 | pcm, str, dev); |
| 990 | if (err < 0) { |
Clemens Ladisch | f87135f | 2005-11-20 14:06:59 +0100 | [diff] [blame] | 991 | list_del(&pcm->list); |
Ingo Molnar | 1a60d4c | 2006-01-16 16:29:08 +0100 | [diff] [blame] | 992 | mutex_unlock(®ister_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 993 | return err; |
| 994 | } |
Takashi Iwai | 9d19f48 | 2006-09-06 14:27:46 +0200 | [diff] [blame] | 995 | snd_add_device_sysfs_file(devtype, pcm->card, pcm->device, |
| 996 | &pcm_attrs); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 997 | for (substream = pcm->streams[cidx].substream; substream; substream = substream->next) |
| 998 | snd_pcm_timer_init(substream); |
| 999 | } |
Johannes Berg | 9244b2c | 2006-10-05 16:02:22 +0200 | [diff] [blame] | 1000 | |
| 1001 | list_for_each_entry(notify, &snd_pcm_notify_list, list) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1002 | notify->n_register(pcm); |
Johannes Berg | 9244b2c | 2006-10-05 16:02:22 +0200 | [diff] [blame] | 1003 | |
Ingo Molnar | 1a60d4c | 2006-01-16 16:29:08 +0100 | [diff] [blame] | 1004 | mutex_unlock(®ister_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1005 | return 0; |
| 1006 | } |
| 1007 | |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 1008 | static int snd_pcm_dev_disconnect(struct snd_device *device) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1009 | { |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 1010 | struct snd_pcm *pcm = device->device_data; |
Takashi Iwai | c461482 | 2006-06-23 14:38:23 +0200 | [diff] [blame] | 1011 | struct snd_pcm_notify *notify; |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 1012 | struct snd_pcm_substream *substream; |
Takashi Iwai | c461482 | 2006-06-23 14:38:23 +0200 | [diff] [blame] | 1013 | int cidx, devtype; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1014 | |
Ingo Molnar | 1a60d4c | 2006-01-16 16:29:08 +0100 | [diff] [blame] | 1015 | mutex_lock(®ister_mutex); |
Takashi Iwai | c461482 | 2006-06-23 14:38:23 +0200 | [diff] [blame] | 1016 | if (list_empty(&pcm->list)) |
| 1017 | goto unlock; |
| 1018 | |
Clemens Ladisch | f87135f | 2005-11-20 14:06:59 +0100 | [diff] [blame] | 1019 | list_del_init(&pcm->list); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1020 | for (cidx = 0; cidx < 2; cidx++) |
| 1021 | for (substream = pcm->streams[cidx].substream; substream; substream = substream->next) |
| 1022 | if (substream->runtime) |
| 1023 | substream->runtime->status->state = SNDRV_PCM_STATE_DISCONNECTED; |
Takashi Iwai | c461482 | 2006-06-23 14:38:23 +0200 | [diff] [blame] | 1024 | list_for_each_entry(notify, &snd_pcm_notify_list, list) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1025 | notify->n_disconnect(pcm); |
| 1026 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1027 | for (cidx = 0; cidx < 2; cidx++) { |
| 1028 | devtype = -1; |
| 1029 | switch (cidx) { |
| 1030 | case SNDRV_PCM_STREAM_PLAYBACK: |
| 1031 | devtype = SNDRV_DEVICE_TYPE_PCM_PLAYBACK; |
| 1032 | break; |
| 1033 | case SNDRV_PCM_STREAM_CAPTURE: |
| 1034 | devtype = SNDRV_DEVICE_TYPE_PCM_CAPTURE; |
| 1035 | break; |
| 1036 | } |
| 1037 | snd_unregister_device(devtype, pcm->card, pcm->device); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1038 | } |
Takashi Iwai | c461482 | 2006-06-23 14:38:23 +0200 | [diff] [blame] | 1039 | unlock: |
Ingo Molnar | 1a60d4c | 2006-01-16 16:29:08 +0100 | [diff] [blame] | 1040 | mutex_unlock(®ister_mutex); |
Takashi Iwai | c461482 | 2006-06-23 14:38:23 +0200 | [diff] [blame] | 1041 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1042 | } |
| 1043 | |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 1044 | int snd_pcm_notify(struct snd_pcm_notify *notify, int nfree) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1045 | { |
Johannes Berg | 9244b2c | 2006-10-05 16:02:22 +0200 | [diff] [blame] | 1046 | struct snd_pcm *pcm; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1047 | |
Takashi Iwai | 7eaa943 | 2008-08-08 17:09:09 +0200 | [diff] [blame] | 1048 | if (snd_BUG_ON(!notify || |
| 1049 | !notify->n_register || |
| 1050 | !notify->n_unregister || |
| 1051 | !notify->n_disconnect)) |
| 1052 | return -EINVAL; |
Ingo Molnar | 1a60d4c | 2006-01-16 16:29:08 +0100 | [diff] [blame] | 1053 | mutex_lock(®ister_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1054 | if (nfree) { |
| 1055 | list_del(¬ify->list); |
Johannes Berg | 9244b2c | 2006-10-05 16:02:22 +0200 | [diff] [blame] | 1056 | list_for_each_entry(pcm, &snd_pcm_devices, list) |
| 1057 | notify->n_unregister(pcm); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1058 | } else { |
| 1059 | list_add_tail(¬ify->list, &snd_pcm_notify_list); |
Johannes Berg | 9244b2c | 2006-10-05 16:02:22 +0200 | [diff] [blame] | 1060 | list_for_each_entry(pcm, &snd_pcm_devices, list) |
| 1061 | notify->n_register(pcm); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1062 | } |
Ingo Molnar | 1a60d4c | 2006-01-16 16:29:08 +0100 | [diff] [blame] | 1063 | mutex_unlock(®ister_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1064 | return 0; |
| 1065 | } |
| 1066 | |
Takashi Iwai | e88e8ae6 | 2006-04-28 15:13:40 +0200 | [diff] [blame] | 1067 | EXPORT_SYMBOL(snd_pcm_notify); |
| 1068 | |
Takashi Iwai | e28563c | 2005-12-01 10:42:42 +0100 | [diff] [blame] | 1069 | #ifdef CONFIG_PROC_FS |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1070 | /* |
| 1071 | * Info interface |
| 1072 | */ |
| 1073 | |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 1074 | static void snd_pcm_proc_read(struct snd_info_entry *entry, |
| 1075 | struct snd_info_buffer *buffer) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1076 | { |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 1077 | struct snd_pcm *pcm; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1078 | |
Ingo Molnar | 1a60d4c | 2006-01-16 16:29:08 +0100 | [diff] [blame] | 1079 | mutex_lock(®ister_mutex); |
Johannes Berg | 9244b2c | 2006-10-05 16:02:22 +0200 | [diff] [blame] | 1080 | list_for_each_entry(pcm, &snd_pcm_devices, list) { |
Clemens Ladisch | f87135f | 2005-11-20 14:06:59 +0100 | [diff] [blame] | 1081 | snd_iprintf(buffer, "%02i-%02i: %s : %s", |
| 1082 | pcm->card->number, pcm->device, pcm->id, pcm->name); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1083 | if (pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream) |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 1084 | snd_iprintf(buffer, " : playback %i", |
| 1085 | pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream_count); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1086 | if (pcm->streams[SNDRV_PCM_STREAM_CAPTURE].substream) |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 1087 | snd_iprintf(buffer, " : capture %i", |
| 1088 | pcm->streams[SNDRV_PCM_STREAM_CAPTURE].substream_count); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1089 | snd_iprintf(buffer, "\n"); |
| 1090 | } |
Ingo Molnar | 1a60d4c | 2006-01-16 16:29:08 +0100 | [diff] [blame] | 1091 | mutex_unlock(®ister_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1092 | } |
| 1093 | |
Takashi Iwai | 6581f4e | 2006-05-17 17:14:51 +0200 | [diff] [blame] | 1094 | static struct snd_info_entry *snd_pcm_proc_entry; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1095 | |
Takashi Iwai | e28563c | 2005-12-01 10:42:42 +0100 | [diff] [blame] | 1096 | static void snd_pcm_proc_init(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1097 | { |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 1098 | struct snd_info_entry *entry; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1099 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1100 | if ((entry = snd_info_create_module_entry(THIS_MODULE, "pcm", NULL)) != NULL) { |
Takashi Iwai | bf85020 | 2006-04-28 15:13:41 +0200 | [diff] [blame] | 1101 | snd_info_set_text_ops(entry, NULL, snd_pcm_proc_read); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1102 | if (snd_info_register(entry) < 0) { |
| 1103 | snd_info_free_entry(entry); |
| 1104 | entry = NULL; |
| 1105 | } |
| 1106 | } |
| 1107 | snd_pcm_proc_entry = entry; |
Takashi Iwai | e28563c | 2005-12-01 10:42:42 +0100 | [diff] [blame] | 1108 | } |
| 1109 | |
| 1110 | static void snd_pcm_proc_done(void) |
| 1111 | { |
Takashi Iwai | 746d4a0 | 2006-06-23 14:37:59 +0200 | [diff] [blame] | 1112 | snd_info_free_entry(snd_pcm_proc_entry); |
Takashi Iwai | e28563c | 2005-12-01 10:42:42 +0100 | [diff] [blame] | 1113 | } |
| 1114 | |
| 1115 | #else /* !CONFIG_PROC_FS */ |
| 1116 | #define snd_pcm_proc_init() |
| 1117 | #define snd_pcm_proc_done() |
| 1118 | #endif /* CONFIG_PROC_FS */ |
| 1119 | |
| 1120 | |
| 1121 | /* |
| 1122 | * ENTRY functions |
| 1123 | */ |
| 1124 | |
| 1125 | static int __init alsa_pcm_init(void) |
| 1126 | { |
| 1127 | snd_ctl_register_ioctl(snd_pcm_control_ioctl); |
| 1128 | snd_ctl_register_ioctl_compat(snd_pcm_control_ioctl); |
| 1129 | snd_pcm_proc_init(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1130 | return 0; |
| 1131 | } |
| 1132 | |
| 1133 | static void __exit alsa_pcm_exit(void) |
| 1134 | { |
| 1135 | snd_ctl_unregister_ioctl(snd_pcm_control_ioctl); |
| 1136 | snd_ctl_unregister_ioctl_compat(snd_pcm_control_ioctl); |
Takashi Iwai | e28563c | 2005-12-01 10:42:42 +0100 | [diff] [blame] | 1137 | snd_pcm_proc_done(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1138 | } |
| 1139 | |
| 1140 | module_init(alsa_pcm_init) |
| 1141 | module_exit(alsa_pcm_exit) |