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> |
Paul Gortmaker | da155d5 | 2011-07-15 12:38:28 -0400 | [diff] [blame] | 24 | #include <linux/module.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 25 | #include <linux/time.h> |
Ingo Molnar | 1a60d4c | 2006-01-16 16:29:08 +0100 | [diff] [blame] | 26 | #include <linux/mutex.h> |
Paul Gortmaker | 51990e8 | 2012-01-22 11:23:42 -0500 | [diff] [blame] | 27 | #include <linux/device.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 28 | #include <sound/core.h> |
| 29 | #include <sound/minors.h> |
| 30 | #include <sound/pcm.h> |
| 31 | #include <sound/control.h> |
| 32 | #include <sound/info.h> |
| 33 | |
Jaroslav Kysela | c1017a4 | 2007-10-15 09:50:19 +0200 | [diff] [blame] | 34 | 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] | 35 | MODULE_DESCRIPTION("Midlevel PCM code for ALSA."); |
| 36 | MODULE_LICENSE("GPL"); |
| 37 | |
Clemens Ladisch | f87135f | 2005-11-20 14:06:59 +0100 | [diff] [blame] | 38 | static LIST_HEAD(snd_pcm_devices); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 39 | static LIST_HEAD(snd_pcm_notify_list); |
Ingo Molnar | 1a60d4c | 2006-01-16 16:29:08 +0100 | [diff] [blame] | 40 | static DEFINE_MUTEX(register_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 41 | |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 42 | static int snd_pcm_free(struct snd_pcm *pcm); |
| 43 | static int snd_pcm_dev_free(struct snd_device *device); |
| 44 | static int snd_pcm_dev_register(struct snd_device *device); |
| 45 | static int snd_pcm_dev_disconnect(struct snd_device *device); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 46 | |
Pawel MOLL | f90c06a | 2008-07-30 12:46:40 +0100 | [diff] [blame] | 47 | 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] | 48 | { |
Clemens Ladisch | f87135f | 2005-11-20 14:06:59 +0100 | [diff] [blame] | 49 | struct snd_pcm *pcm; |
| 50 | |
Johannes Berg | 9244b2c | 2006-10-05 16:02:22 +0200 | [diff] [blame] | 51 | list_for_each_entry(pcm, &snd_pcm_devices, list) { |
Russell King | a4461f4 | 2013-10-31 15:01:37 +0000 | [diff] [blame] | 52 | if (pcm->internal) |
| 53 | continue; |
Clemens Ladisch | f87135f | 2005-11-20 14:06:59 +0100 | [diff] [blame] | 54 | if (pcm->card == card && pcm->device == device) |
| 55 | return pcm; |
| 56 | } |
| 57 | return NULL; |
| 58 | } |
| 59 | |
Pawel MOLL | f90c06a | 2008-07-30 12:46:40 +0100 | [diff] [blame] | 60 | static int snd_pcm_next(struct snd_card *card, int device) |
| 61 | { |
| 62 | struct snd_pcm *pcm; |
| 63 | |
| 64 | list_for_each_entry(pcm, &snd_pcm_devices, list) { |
Russell King | a4461f4 | 2013-10-31 15:01:37 +0000 | [diff] [blame] | 65 | if (pcm->internal) |
| 66 | continue; |
Pawel MOLL | f90c06a | 2008-07-30 12:46:40 +0100 | [diff] [blame] | 67 | if (pcm->card == card && pcm->device > device) |
| 68 | return pcm->device; |
| 69 | else if (pcm->card->number > card->number) |
| 70 | return -1; |
| 71 | } |
| 72 | return -1; |
| 73 | } |
| 74 | |
| 75 | static int snd_pcm_add(struct snd_pcm *newpcm) |
| 76 | { |
| 77 | struct snd_pcm *pcm; |
| 78 | |
| 79 | list_for_each_entry(pcm, &snd_pcm_devices, list) { |
| 80 | if (pcm->card == newpcm->card && pcm->device == newpcm->device) |
| 81 | return -EBUSY; |
| 82 | if (pcm->card->number > newpcm->card->number || |
| 83 | (pcm->card == newpcm->card && |
| 84 | pcm->device > newpcm->device)) { |
| 85 | list_add(&newpcm->list, pcm->list.prev); |
| 86 | return 0; |
| 87 | } |
| 88 | } |
| 89 | list_add_tail(&newpcm->list, &snd_pcm_devices); |
| 90 | return 0; |
| 91 | } |
| 92 | |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 93 | static int snd_pcm_control_ioctl(struct snd_card *card, |
| 94 | struct snd_ctl_file *control, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 95 | unsigned int cmd, unsigned long arg) |
| 96 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 97 | switch (cmd) { |
| 98 | case SNDRV_CTL_IOCTL_PCM_NEXT_DEVICE: |
| 99 | { |
| 100 | int device; |
| 101 | |
| 102 | if (get_user(device, (int __user *)arg)) |
| 103 | return -EFAULT; |
Ingo Molnar | 1a60d4c | 2006-01-16 16:29:08 +0100 | [diff] [blame] | 104 | mutex_lock(®ister_mutex); |
Pawel MOLL | f90c06a | 2008-07-30 12:46:40 +0100 | [diff] [blame] | 105 | device = snd_pcm_next(card, device); |
Ingo Molnar | 1a60d4c | 2006-01-16 16:29:08 +0100 | [diff] [blame] | 106 | mutex_unlock(®ister_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 107 | if (put_user(device, (int __user *)arg)) |
| 108 | return -EFAULT; |
| 109 | return 0; |
| 110 | } |
| 111 | case SNDRV_CTL_IOCTL_PCM_INFO: |
| 112 | { |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 113 | struct snd_pcm_info __user *info; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 114 | unsigned int device, subdevice; |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 115 | int stream; |
| 116 | struct snd_pcm *pcm; |
| 117 | struct snd_pcm_str *pstr; |
| 118 | struct snd_pcm_substream *substream; |
Clemens Ladisch | f87135f | 2005-11-20 14:06:59 +0100 | [diff] [blame] | 119 | int err; |
| 120 | |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 121 | info = (struct snd_pcm_info __user *)arg; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 122 | if (get_user(device, &info->device)) |
| 123 | return -EFAULT; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 124 | if (get_user(stream, &info->stream)) |
| 125 | return -EFAULT; |
| 126 | if (stream < 0 || stream > 1) |
| 127 | return -EINVAL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 128 | if (get_user(subdevice, &info->subdevice)) |
| 129 | return -EFAULT; |
Ingo Molnar | 1a60d4c | 2006-01-16 16:29:08 +0100 | [diff] [blame] | 130 | mutex_lock(®ister_mutex); |
Pawel MOLL | f90c06a | 2008-07-30 12:46:40 +0100 | [diff] [blame] | 131 | pcm = snd_pcm_get(card, device); |
Clemens Ladisch | f87135f | 2005-11-20 14:06:59 +0100 | [diff] [blame] | 132 | if (pcm == NULL) { |
| 133 | err = -ENXIO; |
| 134 | goto _error; |
| 135 | } |
| 136 | pstr = &pcm->streams[stream]; |
| 137 | if (pstr->substream_count == 0) { |
| 138 | err = -ENOENT; |
| 139 | goto _error; |
| 140 | } |
| 141 | if (subdevice >= pstr->substream_count) { |
| 142 | err = -ENXIO; |
| 143 | goto _error; |
| 144 | } |
| 145 | for (substream = pstr->substream; substream; |
| 146 | substream = substream->next) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 147 | if (substream->number == (int)subdevice) |
| 148 | break; |
Clemens Ladisch | f87135f | 2005-11-20 14:06:59 +0100 | [diff] [blame] | 149 | if (substream == NULL) { |
| 150 | err = -ENXIO; |
| 151 | goto _error; |
| 152 | } |
| 153 | err = snd_pcm_info_user(substream, info); |
| 154 | _error: |
Ingo Molnar | 1a60d4c | 2006-01-16 16:29:08 +0100 | [diff] [blame] | 155 | mutex_unlock(®ister_mutex); |
Clemens Ladisch | f87135f | 2005-11-20 14:06:59 +0100 | [diff] [blame] | 156 | return err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 157 | } |
| 158 | case SNDRV_CTL_IOCTL_PCM_PREFER_SUBDEVICE: |
| 159 | { |
| 160 | int val; |
| 161 | |
| 162 | if (get_user(val, (int __user *)arg)) |
| 163 | return -EFAULT; |
| 164 | control->prefer_pcm_subdevice = val; |
| 165 | return 0; |
| 166 | } |
| 167 | } |
| 168 | return -ENOIOCTLCMD; |
| 169 | } |
Jaroslav Kysela | 21a3479 | 2006-01-13 09:12:11 +0100 | [diff] [blame] | 170 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 171 | #define FORMAT(v) [SNDRV_PCM_FORMAT_##v] = #v |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 172 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 173 | static char *snd_pcm_format_names[] = { |
| 174 | FORMAT(S8), |
| 175 | FORMAT(U8), |
| 176 | FORMAT(S16_LE), |
| 177 | FORMAT(S16_BE), |
| 178 | FORMAT(U16_LE), |
| 179 | FORMAT(U16_BE), |
| 180 | FORMAT(S24_LE), |
| 181 | FORMAT(S24_BE), |
| 182 | FORMAT(U24_LE), |
| 183 | FORMAT(U24_BE), |
| 184 | FORMAT(S32_LE), |
| 185 | FORMAT(S32_BE), |
| 186 | FORMAT(U32_LE), |
| 187 | FORMAT(U32_BE), |
| 188 | FORMAT(FLOAT_LE), |
| 189 | FORMAT(FLOAT_BE), |
| 190 | FORMAT(FLOAT64_LE), |
| 191 | FORMAT(FLOAT64_BE), |
| 192 | FORMAT(IEC958_SUBFRAME_LE), |
| 193 | FORMAT(IEC958_SUBFRAME_BE), |
| 194 | FORMAT(MU_LAW), |
| 195 | FORMAT(A_LAW), |
| 196 | FORMAT(IMA_ADPCM), |
| 197 | FORMAT(MPEG), |
| 198 | FORMAT(GSM), |
| 199 | FORMAT(SPECIAL), |
| 200 | FORMAT(S24_3LE), |
| 201 | FORMAT(S24_3BE), |
| 202 | FORMAT(U24_3LE), |
| 203 | FORMAT(U24_3BE), |
| 204 | FORMAT(S20_3LE), |
| 205 | FORMAT(S20_3BE), |
| 206 | FORMAT(U20_3LE), |
| 207 | FORMAT(U20_3BE), |
| 208 | FORMAT(S18_3LE), |
| 209 | FORMAT(S18_3BE), |
| 210 | FORMAT(U18_3LE), |
| 211 | FORMAT(U18_3BE), |
Dan Carpenter | 7a28826 | 2010-08-27 22:02:15 +0200 | [diff] [blame] | 212 | FORMAT(G723_24), |
| 213 | FORMAT(G723_24_1B), |
| 214 | FORMAT(G723_40), |
| 215 | FORMAT(G723_40_1B), |
Daniel Mack | ef7a4f9 | 2013-04-17 00:01:36 +0800 | [diff] [blame] | 216 | FORMAT(DSD_U8), |
| 217 | FORMAT(DSD_U16_LE), |
Jurgen Kramer | d4288d3 | 2014-09-05 10:47:56 +0200 | [diff] [blame] | 218 | FORMAT(DSD_U32_LE), |
Jussi Laako | d42472e | 2014-11-21 16:04:46 +0200 | [diff] [blame^] | 219 | FORMAT(DSD_U16_BE), |
| 220 | FORMAT(DSD_U32_BE), |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 221 | }; |
| 222 | |
Takashi Iwai | 6e5265e | 2009-09-08 14:26:51 +0200 | [diff] [blame] | 223 | const char *snd_pcm_format_name(snd_pcm_format_t format) |
Takashi Iwai | e28563c | 2005-12-01 10:42:42 +0100 | [diff] [blame] | 224 | { |
Clemens Ladisch | fea952e | 2011-02-14 11:00:47 +0100 | [diff] [blame] | 225 | if ((__force unsigned int)format >= ARRAY_SIZE(snd_pcm_format_names)) |
Dan Carpenter | 7a28826 | 2010-08-27 22:02:15 +0200 | [diff] [blame] | 226 | return "Unknown"; |
Clemens Ladisch | fea952e | 2011-02-14 11:00:47 +0100 | [diff] [blame] | 227 | return snd_pcm_format_names[(__force unsigned int)format]; |
Takashi Iwai | e28563c | 2005-12-01 10:42:42 +0100 | [diff] [blame] | 228 | } |
Takashi Iwai | 6e5265e | 2009-09-08 14:26:51 +0200 | [diff] [blame] | 229 | EXPORT_SYMBOL_GPL(snd_pcm_format_name); |
| 230 | |
| 231 | #ifdef CONFIG_SND_VERBOSE_PROCFS |
| 232 | |
| 233 | #define STATE(v) [SNDRV_PCM_STATE_##v] = #v |
| 234 | #define STREAM(v) [SNDRV_PCM_STREAM_##v] = #v |
| 235 | #define READY(v) [SNDRV_PCM_READY_##v] = #v |
| 236 | #define XRUN(v) [SNDRV_PCM_XRUN_##v] = #v |
| 237 | #define SILENCE(v) [SNDRV_PCM_SILENCE_##v] = #v |
| 238 | #define TSTAMP(v) [SNDRV_PCM_TSTAMP_##v] = #v |
| 239 | #define ACCESS(v) [SNDRV_PCM_ACCESS_##v] = #v |
| 240 | #define START(v) [SNDRV_PCM_START_##v] = #v |
| 241 | #define SUBFORMAT(v) [SNDRV_PCM_SUBFORMAT_##v] = #v |
Takashi Iwai | e28563c | 2005-12-01 10:42:42 +0100 | [diff] [blame] | 242 | |
Takashi Iwai | e28563c | 2005-12-01 10:42:42 +0100 | [diff] [blame] | 243 | static char *snd_pcm_stream_names[] = { |
| 244 | STREAM(PLAYBACK), |
| 245 | STREAM(CAPTURE), |
| 246 | }; |
| 247 | |
| 248 | static char *snd_pcm_state_names[] = { |
| 249 | STATE(OPEN), |
| 250 | STATE(SETUP), |
| 251 | STATE(PREPARED), |
| 252 | STATE(RUNNING), |
| 253 | STATE(XRUN), |
| 254 | STATE(DRAINING), |
| 255 | STATE(PAUSED), |
| 256 | STATE(SUSPENDED), |
| 257 | }; |
| 258 | |
| 259 | static char *snd_pcm_access_names[] = { |
| 260 | ACCESS(MMAP_INTERLEAVED), |
| 261 | ACCESS(MMAP_NONINTERLEAVED), |
| 262 | ACCESS(MMAP_COMPLEX), |
| 263 | ACCESS(RW_INTERLEAVED), |
| 264 | ACCESS(RW_NONINTERLEAVED), |
| 265 | }; |
| 266 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 267 | static char *snd_pcm_subformat_names[] = { |
| 268 | SUBFORMAT(STD), |
| 269 | }; |
| 270 | |
| 271 | static char *snd_pcm_tstamp_mode_names[] = { |
| 272 | TSTAMP(NONE), |
Jaroslav Kysela | 8c12158 | 2008-01-11 08:45:08 +0100 | [diff] [blame] | 273 | TSTAMP(ENABLE), |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 274 | }; |
| 275 | |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 276 | static const char *snd_pcm_stream_name(int stream) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 277 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 278 | return snd_pcm_stream_names[stream]; |
| 279 | } |
| 280 | |
| 281 | static const char *snd_pcm_access_name(snd_pcm_access_t access) |
| 282 | { |
Clemens Ladisch | fea952e | 2011-02-14 11:00:47 +0100 | [diff] [blame] | 283 | return snd_pcm_access_names[(__force int)access]; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 284 | } |
| 285 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 286 | static const char *snd_pcm_subformat_name(snd_pcm_subformat_t subformat) |
| 287 | { |
Clemens Ladisch | fea952e | 2011-02-14 11:00:47 +0100 | [diff] [blame] | 288 | return snd_pcm_subformat_names[(__force int)subformat]; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 289 | } |
| 290 | |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 291 | static const char *snd_pcm_tstamp_mode_name(int mode) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 292 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 293 | return snd_pcm_tstamp_mode_names[mode]; |
| 294 | } |
| 295 | |
| 296 | static const char *snd_pcm_state_name(snd_pcm_state_t state) |
| 297 | { |
Clemens Ladisch | fea952e | 2011-02-14 11:00:47 +0100 | [diff] [blame] | 298 | return snd_pcm_state_names[(__force int)state]; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 299 | } |
| 300 | |
Takashi Iwai | 8eeaa2f | 2014-02-10 09:48:47 +0100 | [diff] [blame] | 301 | #if IS_ENABLED(CONFIG_SND_PCM_OSS) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 302 | #include <linux/soundcard.h> |
Ingo Molnar | 1a60d4c | 2006-01-16 16:29:08 +0100 | [diff] [blame] | 303 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 304 | static const char *snd_pcm_oss_format_name(int format) |
| 305 | { |
| 306 | switch (format) { |
| 307 | case AFMT_MU_LAW: |
| 308 | return "MU_LAW"; |
| 309 | case AFMT_A_LAW: |
| 310 | return "A_LAW"; |
| 311 | case AFMT_IMA_ADPCM: |
| 312 | return "IMA_ADPCM"; |
| 313 | case AFMT_U8: |
| 314 | return "U8"; |
| 315 | case AFMT_S16_LE: |
| 316 | return "S16_LE"; |
| 317 | case AFMT_S16_BE: |
| 318 | return "S16_BE"; |
| 319 | case AFMT_S8: |
| 320 | return "S8"; |
| 321 | case AFMT_U16_LE: |
| 322 | return "U16_LE"; |
| 323 | case AFMT_U16_BE: |
| 324 | return "U16_BE"; |
| 325 | case AFMT_MPEG: |
| 326 | return "MPEG"; |
| 327 | default: |
| 328 | return "unknown"; |
| 329 | } |
| 330 | } |
| 331 | #endif |
| 332 | |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 333 | static void snd_pcm_proc_info_read(struct snd_pcm_substream *substream, |
| 334 | struct snd_info_buffer *buffer) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 335 | { |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 336 | struct snd_pcm_info *info; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 337 | int err; |
| 338 | |
Takashi Iwai | 7c22f1a | 2005-10-10 11:46:31 +0200 | [diff] [blame] | 339 | if (! substream) |
| 340 | return; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 341 | |
| 342 | info = kmalloc(sizeof(*info), GFP_KERNEL); |
| 343 | if (! info) { |
Takashi Iwai | 09e56df | 2014-02-04 18:19:48 +0100 | [diff] [blame] | 344 | pcm_dbg(substream->pcm, |
| 345 | "snd_pcm_proc_info_read: cannot malloc\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 346 | return; |
| 347 | } |
| 348 | |
| 349 | err = snd_pcm_info(substream, info); |
| 350 | if (err < 0) { |
| 351 | snd_iprintf(buffer, "error %d\n", err); |
| 352 | kfree(info); |
| 353 | return; |
| 354 | } |
| 355 | snd_iprintf(buffer, "card: %d\n", info->card); |
| 356 | snd_iprintf(buffer, "device: %d\n", info->device); |
| 357 | snd_iprintf(buffer, "subdevice: %d\n", info->subdevice); |
| 358 | snd_iprintf(buffer, "stream: %s\n", snd_pcm_stream_name(info->stream)); |
| 359 | snd_iprintf(buffer, "id: %s\n", info->id); |
| 360 | snd_iprintf(buffer, "name: %s\n", info->name); |
| 361 | snd_iprintf(buffer, "subname: %s\n", info->subname); |
| 362 | snd_iprintf(buffer, "class: %d\n", info->dev_class); |
| 363 | snd_iprintf(buffer, "subclass: %d\n", info->dev_subclass); |
| 364 | snd_iprintf(buffer, "subdevices_count: %d\n", info->subdevices_count); |
| 365 | snd_iprintf(buffer, "subdevices_avail: %d\n", info->subdevices_avail); |
| 366 | kfree(info); |
| 367 | } |
| 368 | |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 369 | static void snd_pcm_stream_proc_info_read(struct snd_info_entry *entry, |
| 370 | struct snd_info_buffer *buffer) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 371 | { |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 372 | snd_pcm_proc_info_read(((struct snd_pcm_str *)entry->private_data)->substream, |
| 373 | buffer); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 374 | } |
| 375 | |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 376 | static void snd_pcm_substream_proc_info_read(struct snd_info_entry *entry, |
| 377 | struct snd_info_buffer *buffer) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 378 | { |
Joe Perches | 9fe856e | 2010-09-04 18:52:54 -0700 | [diff] [blame] | 379 | snd_pcm_proc_info_read(entry->private_data, buffer); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 380 | } |
| 381 | |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 382 | static void snd_pcm_substream_proc_hw_params_read(struct snd_info_entry *entry, |
| 383 | struct snd_info_buffer *buffer) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 384 | { |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 385 | struct snd_pcm_substream *substream = entry->private_data; |
Takashi Iwai | 901d46d | 2010-09-16 23:06:50 +0200 | [diff] [blame] | 386 | struct snd_pcm_runtime *runtime; |
| 387 | |
| 388 | mutex_lock(&substream->pcm->open_mutex); |
| 389 | runtime = substream->runtime; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 390 | if (!runtime) { |
| 391 | snd_iprintf(buffer, "closed\n"); |
Takashi Iwai | 901d46d | 2010-09-16 23:06:50 +0200 | [diff] [blame] | 392 | goto unlock; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 393 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 394 | if (runtime->status->state == SNDRV_PCM_STATE_OPEN) { |
| 395 | snd_iprintf(buffer, "no setup\n"); |
Takashi Iwai | 901d46d | 2010-09-16 23:06:50 +0200 | [diff] [blame] | 396 | goto unlock; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 397 | } |
| 398 | snd_iprintf(buffer, "access: %s\n", snd_pcm_access_name(runtime->access)); |
| 399 | snd_iprintf(buffer, "format: %s\n", snd_pcm_format_name(runtime->format)); |
| 400 | snd_iprintf(buffer, "subformat: %s\n", snd_pcm_subformat_name(runtime->subformat)); |
| 401 | snd_iprintf(buffer, "channels: %u\n", runtime->channels); |
| 402 | snd_iprintf(buffer, "rate: %u (%u/%u)\n", runtime->rate, runtime->rate_num, runtime->rate_den); |
| 403 | snd_iprintf(buffer, "period_size: %lu\n", runtime->period_size); |
| 404 | snd_iprintf(buffer, "buffer_size: %lu\n", runtime->buffer_size); |
Takashi Iwai | 8eeaa2f | 2014-02-10 09:48:47 +0100 | [diff] [blame] | 405 | #if IS_ENABLED(CONFIG_SND_PCM_OSS) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 406 | if (substream->oss.oss) { |
| 407 | snd_iprintf(buffer, "OSS format: %s\n", snd_pcm_oss_format_name(runtime->oss.format)); |
| 408 | snd_iprintf(buffer, "OSS channels: %u\n", runtime->oss.channels); |
| 409 | snd_iprintf(buffer, "OSS rate: %u\n", runtime->oss.rate); |
| 410 | snd_iprintf(buffer, "OSS period bytes: %lu\n", (unsigned long)runtime->oss.period_bytes); |
| 411 | snd_iprintf(buffer, "OSS periods: %u\n", runtime->oss.periods); |
| 412 | snd_iprintf(buffer, "OSS period frames: %lu\n", (unsigned long)runtime->oss.period_frames); |
| 413 | } |
| 414 | #endif |
Takashi Iwai | 901d46d | 2010-09-16 23:06:50 +0200 | [diff] [blame] | 415 | unlock: |
| 416 | mutex_unlock(&substream->pcm->open_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 417 | } |
| 418 | |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 419 | static void snd_pcm_substream_proc_sw_params_read(struct snd_info_entry *entry, |
| 420 | struct snd_info_buffer *buffer) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 421 | { |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 422 | struct snd_pcm_substream *substream = entry->private_data; |
Takashi Iwai | 901d46d | 2010-09-16 23:06:50 +0200 | [diff] [blame] | 423 | struct snd_pcm_runtime *runtime; |
| 424 | |
| 425 | mutex_lock(&substream->pcm->open_mutex); |
| 426 | runtime = substream->runtime; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 427 | if (!runtime) { |
| 428 | snd_iprintf(buffer, "closed\n"); |
Takashi Iwai | 901d46d | 2010-09-16 23:06:50 +0200 | [diff] [blame] | 429 | goto unlock; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 430 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 431 | if (runtime->status->state == SNDRV_PCM_STATE_OPEN) { |
| 432 | snd_iprintf(buffer, "no setup\n"); |
Takashi Iwai | 901d46d | 2010-09-16 23:06:50 +0200 | [diff] [blame] | 433 | goto unlock; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 434 | } |
| 435 | snd_iprintf(buffer, "tstamp_mode: %s\n", snd_pcm_tstamp_mode_name(runtime->tstamp_mode)); |
| 436 | snd_iprintf(buffer, "period_step: %u\n", runtime->period_step); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 437 | snd_iprintf(buffer, "avail_min: %lu\n", runtime->control->avail_min); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 438 | snd_iprintf(buffer, "start_threshold: %lu\n", runtime->start_threshold); |
| 439 | snd_iprintf(buffer, "stop_threshold: %lu\n", runtime->stop_threshold); |
| 440 | snd_iprintf(buffer, "silence_threshold: %lu\n", runtime->silence_threshold); |
| 441 | snd_iprintf(buffer, "silence_size: %lu\n", runtime->silence_size); |
| 442 | snd_iprintf(buffer, "boundary: %lu\n", runtime->boundary); |
Takashi Iwai | 901d46d | 2010-09-16 23:06:50 +0200 | [diff] [blame] | 443 | unlock: |
| 444 | mutex_unlock(&substream->pcm->open_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 445 | } |
| 446 | |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 447 | static void snd_pcm_substream_proc_status_read(struct snd_info_entry *entry, |
| 448 | struct snd_info_buffer *buffer) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 449 | { |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 450 | struct snd_pcm_substream *substream = entry->private_data; |
Takashi Iwai | 901d46d | 2010-09-16 23:06:50 +0200 | [diff] [blame] | 451 | struct snd_pcm_runtime *runtime; |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 452 | struct snd_pcm_status status; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 453 | int err; |
Takashi Iwai | 901d46d | 2010-09-16 23:06:50 +0200 | [diff] [blame] | 454 | |
| 455 | mutex_lock(&substream->pcm->open_mutex); |
| 456 | runtime = substream->runtime; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 457 | if (!runtime) { |
| 458 | snd_iprintf(buffer, "closed\n"); |
Takashi Iwai | 901d46d | 2010-09-16 23:06:50 +0200 | [diff] [blame] | 459 | goto unlock; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 460 | } |
| 461 | memset(&status, 0, sizeof(status)); |
| 462 | err = snd_pcm_status(substream, &status); |
| 463 | if (err < 0) { |
| 464 | snd_iprintf(buffer, "error %d\n", err); |
Takashi Iwai | 901d46d | 2010-09-16 23:06:50 +0200 | [diff] [blame] | 465 | goto unlock; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 466 | } |
| 467 | snd_iprintf(buffer, "state: %s\n", snd_pcm_state_name(status.state)); |
Clemens Ladisch | e7373b7 | 2009-11-10 10:13:30 +0100 | [diff] [blame] | 468 | snd_iprintf(buffer, "owner_pid : %d\n", pid_vnr(substream->pid)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 469 | snd_iprintf(buffer, "trigger_time: %ld.%09ld\n", |
| 470 | status.trigger_tstamp.tv_sec, status.trigger_tstamp.tv_nsec); |
| 471 | snd_iprintf(buffer, "tstamp : %ld.%09ld\n", |
| 472 | status.tstamp.tv_sec, status.tstamp.tv_nsec); |
| 473 | snd_iprintf(buffer, "delay : %ld\n", status.delay); |
| 474 | snd_iprintf(buffer, "avail : %ld\n", status.avail); |
| 475 | snd_iprintf(buffer, "avail_max : %ld\n", status.avail_max); |
| 476 | snd_iprintf(buffer, "-----\n"); |
| 477 | snd_iprintf(buffer, "hw_ptr : %ld\n", runtime->status->hw_ptr); |
| 478 | snd_iprintf(buffer, "appl_ptr : %ld\n", runtime->control->appl_ptr); |
Takashi Iwai | 901d46d | 2010-09-16 23:06:50 +0200 | [diff] [blame] | 479 | unlock: |
| 480 | mutex_unlock(&substream->pcm->open_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 481 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 482 | |
Jaroslav Kysela | 61fb63c | 2006-04-24 21:57:16 +0200 | [diff] [blame] | 483 | #ifdef CONFIG_SND_PCM_XRUN_DEBUG |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 484 | static void snd_pcm_xrun_debug_read(struct snd_info_entry *entry, |
| 485 | struct snd_info_buffer *buffer) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 486 | { |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 487 | struct snd_pcm_str *pstr = entry->private_data; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 488 | snd_iprintf(buffer, "%d\n", pstr->xrun_debug); |
| 489 | } |
| 490 | |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 491 | static void snd_pcm_xrun_debug_write(struct snd_info_entry *entry, |
| 492 | struct snd_info_buffer *buffer) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 493 | { |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 494 | struct snd_pcm_str *pstr = entry->private_data; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 495 | char line[64]; |
| 496 | if (!snd_info_get_line(buffer, line, sizeof(line))) |
| 497 | pstr->xrun_debug = simple_strtoul(line, NULL, 10); |
| 498 | } |
| 499 | #endif |
| 500 | |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 501 | static int snd_pcm_stream_proc_init(struct snd_pcm_str *pstr) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 502 | { |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 503 | struct snd_pcm *pcm = pstr->pcm; |
| 504 | struct snd_info_entry *entry; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 505 | char name[16]; |
| 506 | |
| 507 | sprintf(name, "pcm%i%c", pcm->device, |
| 508 | pstr->stream == SNDRV_PCM_STREAM_PLAYBACK ? 'p' : 'c'); |
| 509 | if ((entry = snd_info_create_card_entry(pcm->card, name, pcm->card->proc_root)) == NULL) |
| 510 | return -ENOMEM; |
| 511 | entry->mode = S_IFDIR | S_IRUGO | S_IXUGO; |
| 512 | if (snd_info_register(entry) < 0) { |
| 513 | snd_info_free_entry(entry); |
| 514 | return -ENOMEM; |
| 515 | } |
| 516 | pstr->proc_root = entry; |
| 517 | |
| 518 | 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] | 519 | 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] | 520 | if (snd_info_register(entry) < 0) { |
| 521 | snd_info_free_entry(entry); |
| 522 | entry = NULL; |
| 523 | } |
| 524 | } |
| 525 | pstr->proc_info_entry = entry; |
| 526 | |
Jaroslav Kysela | 61fb63c | 2006-04-24 21:57:16 +0200 | [diff] [blame] | 527 | #ifdef CONFIG_SND_PCM_XRUN_DEBUG |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 528 | if ((entry = snd_info_create_card_entry(pcm->card, "xrun_debug", |
| 529 | pstr->proc_root)) != NULL) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 530 | entry->c.text.read = snd_pcm_xrun_debug_read; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 531 | entry->c.text.write = snd_pcm_xrun_debug_write; |
Takashi Iwai | bd7bf04 | 2005-04-12 16:27:28 +0200 | [diff] [blame] | 532 | entry->mode |= S_IWUSR; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 533 | entry->private_data = pstr; |
| 534 | if (snd_info_register(entry) < 0) { |
| 535 | snd_info_free_entry(entry); |
| 536 | entry = NULL; |
| 537 | } |
| 538 | } |
| 539 | pstr->proc_xrun_debug_entry = entry; |
| 540 | #endif |
| 541 | return 0; |
| 542 | } |
| 543 | |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 544 | static int snd_pcm_stream_proc_done(struct snd_pcm_str *pstr) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 545 | { |
Jaroslav Kysela | 61fb63c | 2006-04-24 21:57:16 +0200 | [diff] [blame] | 546 | #ifdef CONFIG_SND_PCM_XRUN_DEBUG |
Takashi Iwai | 746d4a0 | 2006-06-23 14:37:59 +0200 | [diff] [blame] | 547 | snd_info_free_entry(pstr->proc_xrun_debug_entry); |
| 548 | pstr->proc_xrun_debug_entry = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 549 | #endif |
Takashi Iwai | 746d4a0 | 2006-06-23 14:37:59 +0200 | [diff] [blame] | 550 | snd_info_free_entry(pstr->proc_info_entry); |
| 551 | pstr->proc_info_entry = NULL; |
| 552 | snd_info_free_entry(pstr->proc_root); |
| 553 | pstr->proc_root = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 554 | return 0; |
| 555 | } |
| 556 | |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 557 | static int snd_pcm_substream_proc_init(struct snd_pcm_substream *substream) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 558 | { |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 559 | struct snd_info_entry *entry; |
| 560 | struct snd_card *card; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 561 | char name[16]; |
| 562 | |
| 563 | card = substream->pcm->card; |
| 564 | |
| 565 | sprintf(name, "sub%i", substream->number); |
| 566 | if ((entry = snd_info_create_card_entry(card, name, substream->pstr->proc_root)) == NULL) |
| 567 | return -ENOMEM; |
| 568 | entry->mode = S_IFDIR | S_IRUGO | S_IXUGO; |
| 569 | if (snd_info_register(entry) < 0) { |
| 570 | snd_info_free_entry(entry); |
| 571 | return -ENOMEM; |
| 572 | } |
| 573 | substream->proc_root = entry; |
| 574 | |
| 575 | 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] | 576 | snd_info_set_text_ops(entry, substream, |
| 577 | snd_pcm_substream_proc_info_read); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 578 | if (snd_info_register(entry) < 0) { |
| 579 | snd_info_free_entry(entry); |
| 580 | entry = NULL; |
| 581 | } |
| 582 | } |
| 583 | substream->proc_info_entry = entry; |
| 584 | |
| 585 | 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] | 586 | snd_info_set_text_ops(entry, substream, |
| 587 | snd_pcm_substream_proc_hw_params_read); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 588 | if (snd_info_register(entry) < 0) { |
| 589 | snd_info_free_entry(entry); |
| 590 | entry = NULL; |
| 591 | } |
| 592 | } |
| 593 | substream->proc_hw_params_entry = entry; |
| 594 | |
| 595 | 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] | 596 | snd_info_set_text_ops(entry, substream, |
| 597 | snd_pcm_substream_proc_sw_params_read); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 598 | if (snd_info_register(entry) < 0) { |
| 599 | snd_info_free_entry(entry); |
| 600 | entry = NULL; |
| 601 | } |
| 602 | } |
| 603 | substream->proc_sw_params_entry = entry; |
| 604 | |
| 605 | 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] | 606 | snd_info_set_text_ops(entry, substream, |
| 607 | snd_pcm_substream_proc_status_read); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 608 | if (snd_info_register(entry) < 0) { |
| 609 | snd_info_free_entry(entry); |
| 610 | entry = NULL; |
| 611 | } |
| 612 | } |
| 613 | substream->proc_status_entry = entry; |
| 614 | |
| 615 | return 0; |
| 616 | } |
Takashi Iwai | 746d4a0 | 2006-06-23 14:37:59 +0200 | [diff] [blame] | 617 | |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 618 | static int snd_pcm_substream_proc_done(struct snd_pcm_substream *substream) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 619 | { |
Takashi Iwai | 746d4a0 | 2006-06-23 14:37:59 +0200 | [diff] [blame] | 620 | snd_info_free_entry(substream->proc_info_entry); |
| 621 | substream->proc_info_entry = NULL; |
| 622 | snd_info_free_entry(substream->proc_hw_params_entry); |
| 623 | substream->proc_hw_params_entry = NULL; |
| 624 | snd_info_free_entry(substream->proc_sw_params_entry); |
| 625 | substream->proc_sw_params_entry = NULL; |
| 626 | snd_info_free_entry(substream->proc_status_entry); |
| 627 | substream->proc_status_entry = NULL; |
| 628 | snd_info_free_entry(substream->proc_root); |
| 629 | substream->proc_root = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 630 | return 0; |
| 631 | } |
Takashi Iwai | b7d90a3 | 2006-04-25 12:56:04 +0200 | [diff] [blame] | 632 | #else /* !CONFIG_SND_VERBOSE_PROCFS */ |
Takashi Iwai | e28563c | 2005-12-01 10:42:42 +0100 | [diff] [blame] | 633 | static inline int snd_pcm_stream_proc_init(struct snd_pcm_str *pstr) { return 0; } |
| 634 | static inline int snd_pcm_stream_proc_done(struct snd_pcm_str *pstr) { return 0; } |
| 635 | static inline int snd_pcm_substream_proc_init(struct snd_pcm_substream *substream) { return 0; } |
| 636 | 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] | 637 | #endif /* CONFIG_SND_VERBOSE_PROCFS */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 638 | |
| 639 | /** |
| 640 | * snd_pcm_new_stream - create a new PCM stream |
| 641 | * @pcm: the pcm instance |
| 642 | * @stream: the stream direction, SNDRV_PCM_STREAM_XXX |
| 643 | * @substream_count: the number of substreams |
| 644 | * |
| 645 | * Creates a new stream for the pcm. |
| 646 | * The corresponding stream on the pcm must have been empty before |
| 647 | * calling this, i.e. zero must be given to the argument of |
| 648 | * snd_pcm_new(). |
| 649 | * |
Yacine Belkadi | eb7c06e | 2013-03-11 22:05:14 +0100 | [diff] [blame] | 650 | * Return: Zero if successful, or a negative error code on failure. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 651 | */ |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 652 | 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] | 653 | { |
| 654 | int idx, err; |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 655 | struct snd_pcm_str *pstr = &pcm->streams[stream]; |
| 656 | struct snd_pcm_substream *substream, *prev; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 657 | |
Takashi Iwai | 8eeaa2f | 2014-02-10 09:48:47 +0100 | [diff] [blame] | 658 | #if IS_ENABLED(CONFIG_SND_PCM_OSS) |
Ingo Molnar | 1a60d4c | 2006-01-16 16:29:08 +0100 | [diff] [blame] | 659 | mutex_init(&pstr->oss.setup_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 660 | #endif |
| 661 | pstr->stream = stream; |
| 662 | pstr->pcm = pcm; |
| 663 | pstr->substream_count = substream_count; |
Liam Girdwood | 945e503 | 2012-02-08 20:33:31 +0000 | [diff] [blame] | 664 | if (substream_count > 0 && !pcm->internal) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 665 | err = snd_pcm_stream_proc_init(pstr); |
Takashi Iwai | 73e77ba | 2005-11-17 17:44:01 +0100 | [diff] [blame] | 666 | if (err < 0) { |
Takashi Iwai | 09e56df | 2014-02-04 18:19:48 +0100 | [diff] [blame] | 667 | pcm_err(pcm, "Error in snd_pcm_stream_proc_init\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 668 | return err; |
Takashi Iwai | 73e77ba | 2005-11-17 17:44:01 +0100 | [diff] [blame] | 669 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 670 | } |
| 671 | prev = NULL; |
| 672 | for (idx = 0, prev = NULL; idx < substream_count; idx++) { |
Takashi Iwai | ca2c096 | 2005-09-09 14:20:23 +0200 | [diff] [blame] | 673 | substream = kzalloc(sizeof(*substream), GFP_KERNEL); |
Takashi Iwai | 73e77ba | 2005-11-17 17:44:01 +0100 | [diff] [blame] | 674 | if (substream == NULL) { |
Takashi Iwai | 09e56df | 2014-02-04 18:19:48 +0100 | [diff] [blame] | 675 | pcm_err(pcm, "Cannot allocate PCM substream\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 676 | return -ENOMEM; |
Takashi Iwai | 73e77ba | 2005-11-17 17:44:01 +0100 | [diff] [blame] | 677 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 678 | substream->pcm = pcm; |
| 679 | substream->pstr = pstr; |
| 680 | substream->number = idx; |
| 681 | substream->stream = stream; |
| 682 | sprintf(substream->name, "subdevice #%i", idx); |
| 683 | substream->buffer_bytes_max = UINT_MAX; |
| 684 | if (prev == NULL) |
| 685 | pstr->substream = substream; |
| 686 | else |
| 687 | prev->next = substream; |
Liam Girdwood | 945e503 | 2012-02-08 20:33:31 +0000 | [diff] [blame] | 688 | |
| 689 | if (!pcm->internal) { |
| 690 | err = snd_pcm_substream_proc_init(substream); |
| 691 | if (err < 0) { |
Takashi Iwai | 09e56df | 2014-02-04 18:19:48 +0100 | [diff] [blame] | 692 | pcm_err(pcm, |
| 693 | "Error in snd_pcm_stream_proc_init\n"); |
Liam Girdwood | 945e503 | 2012-02-08 20:33:31 +0000 | [diff] [blame] | 694 | if (prev == NULL) |
| 695 | pstr->substream = NULL; |
| 696 | else |
| 697 | prev->next = NULL; |
| 698 | kfree(substream); |
| 699 | return err; |
| 700 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 701 | } |
| 702 | substream->group = &substream->self_group; |
| 703 | spin_lock_init(&substream->self_group.lock); |
Takashi Iwai | 257f8cc | 2014-08-29 15:32:29 +0200 | [diff] [blame] | 704 | mutex_init(&substream->self_group.mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 705 | INIT_LIST_HEAD(&substream->self_group.substreams); |
| 706 | list_add_tail(&substream->link_list, &substream->self_group.substreams); |
Takashi Iwai | 9c323fc | 2006-04-28 15:13:41 +0200 | [diff] [blame] | 707 | atomic_set(&substream->mmap_count, 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 708 | prev = substream; |
| 709 | } |
| 710 | return 0; |
| 711 | } |
| 712 | |
Takashi Iwai | e88e8ae6 | 2006-04-28 15:13:40 +0200 | [diff] [blame] | 713 | EXPORT_SYMBOL(snd_pcm_new_stream); |
| 714 | |
Liam Girdwood | 945e503 | 2012-02-08 20:33:31 +0000 | [diff] [blame] | 715 | static int _snd_pcm_new(struct snd_card *card, const char *id, int device, |
| 716 | int playback_count, int capture_count, bool internal, |
| 717 | struct snd_pcm **rpcm) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 718 | { |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 719 | struct snd_pcm *pcm; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 720 | int err; |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 721 | static struct snd_device_ops ops = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 722 | .dev_free = snd_pcm_dev_free, |
| 723 | .dev_register = snd_pcm_dev_register, |
| 724 | .dev_disconnect = snd_pcm_dev_disconnect, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 725 | }; |
| 726 | |
Takashi Iwai | 7eaa943 | 2008-08-08 17:09:09 +0200 | [diff] [blame] | 727 | if (snd_BUG_ON(!card)) |
| 728 | return -ENXIO; |
| 729 | if (rpcm) |
| 730 | *rpcm = NULL; |
Takashi Iwai | ca2c096 | 2005-09-09 14:20:23 +0200 | [diff] [blame] | 731 | pcm = kzalloc(sizeof(*pcm), GFP_KERNEL); |
Takashi Iwai | 73e77ba | 2005-11-17 17:44:01 +0100 | [diff] [blame] | 732 | if (pcm == NULL) { |
Takashi Iwai | 09e56df | 2014-02-04 18:19:48 +0100 | [diff] [blame] | 733 | dev_err(card->dev, "Cannot allocate PCM\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 734 | return -ENOMEM; |
Takashi Iwai | 73e77ba | 2005-11-17 17:44:01 +0100 | [diff] [blame] | 735 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 736 | pcm->card = card; |
| 737 | pcm->device = device; |
Liam Girdwood | 945e503 | 2012-02-08 20:33:31 +0000 | [diff] [blame] | 738 | pcm->internal = internal; |
Takashi Iwai | 73e77ba | 2005-11-17 17:44:01 +0100 | [diff] [blame] | 739 | if (id) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 740 | strlcpy(pcm->id, id, sizeof(pcm->id)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 741 | if ((err = snd_pcm_new_stream(pcm, SNDRV_PCM_STREAM_PLAYBACK, playback_count)) < 0) { |
| 742 | snd_pcm_free(pcm); |
| 743 | return err; |
| 744 | } |
| 745 | if ((err = snd_pcm_new_stream(pcm, SNDRV_PCM_STREAM_CAPTURE, capture_count)) < 0) { |
| 746 | snd_pcm_free(pcm); |
| 747 | return err; |
| 748 | } |
Ingo Molnar | 1a60d4c | 2006-01-16 16:29:08 +0100 | [diff] [blame] | 749 | mutex_init(&pcm->open_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 750 | init_waitqueue_head(&pcm->open_wait); |
| 751 | if ((err = snd_device_new(card, SNDRV_DEV_PCM, pcm, &ops)) < 0) { |
| 752 | snd_pcm_free(pcm); |
| 753 | return err; |
| 754 | } |
Takashi Iwai | 7eaa943 | 2008-08-08 17:09:09 +0200 | [diff] [blame] | 755 | if (rpcm) |
| 756 | *rpcm = pcm; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 757 | return 0; |
| 758 | } |
| 759 | |
Liam Girdwood | 945e503 | 2012-02-08 20:33:31 +0000 | [diff] [blame] | 760 | /** |
| 761 | * snd_pcm_new - create a new PCM instance |
| 762 | * @card: the card instance |
| 763 | * @id: the id string |
| 764 | * @device: the device index (zero based) |
| 765 | * @playback_count: the number of substreams for playback |
| 766 | * @capture_count: the number of substreams for capture |
| 767 | * @rpcm: the pointer to store the new pcm instance |
| 768 | * |
| 769 | * Creates a new PCM instance. |
| 770 | * |
| 771 | * The pcm operators have to be set afterwards to the new instance |
| 772 | * via snd_pcm_set_ops(). |
| 773 | * |
Yacine Belkadi | eb7c06e | 2013-03-11 22:05:14 +0100 | [diff] [blame] | 774 | * Return: Zero if successful, or a negative error code on failure. |
Liam Girdwood | 945e503 | 2012-02-08 20:33:31 +0000 | [diff] [blame] | 775 | */ |
| 776 | int snd_pcm_new(struct snd_card *card, const char *id, int device, |
| 777 | int playback_count, int capture_count, struct snd_pcm **rpcm) |
| 778 | { |
| 779 | return _snd_pcm_new(card, id, device, playback_count, capture_count, |
| 780 | false, rpcm); |
| 781 | } |
Takashi Iwai | e88e8ae6 | 2006-04-28 15:13:40 +0200 | [diff] [blame] | 782 | EXPORT_SYMBOL(snd_pcm_new); |
| 783 | |
Liam Girdwood | 945e503 | 2012-02-08 20:33:31 +0000 | [diff] [blame] | 784 | /** |
| 785 | * snd_pcm_new_internal - create a new internal PCM instance |
| 786 | * @card: the card instance |
| 787 | * @id: the id string |
| 788 | * @device: the device index (zero based - shared with normal PCMs) |
| 789 | * @playback_count: the number of substreams for playback |
| 790 | * @capture_count: the number of substreams for capture |
| 791 | * @rpcm: the pointer to store the new pcm instance |
| 792 | * |
| 793 | * Creates a new internal PCM instance with no userspace device or procfs |
| 794 | * entries. This is used by ASoC Back End PCMs in order to create a PCM that |
| 795 | * will only be used internally by kernel drivers. i.e. it cannot be opened |
| 796 | * by userspace. It provides existing ASoC components drivers with a substream |
| 797 | * and access to any private data. |
| 798 | * |
| 799 | * The pcm operators have to be set afterwards to the new instance |
| 800 | * via snd_pcm_set_ops(). |
| 801 | * |
Yacine Belkadi | eb7c06e | 2013-03-11 22:05:14 +0100 | [diff] [blame] | 802 | * Return: Zero if successful, or a negative error code on failure. |
Liam Girdwood | 945e503 | 2012-02-08 20:33:31 +0000 | [diff] [blame] | 803 | */ |
| 804 | int snd_pcm_new_internal(struct snd_card *card, const char *id, int device, |
| 805 | int playback_count, int capture_count, |
| 806 | struct snd_pcm **rpcm) |
| 807 | { |
| 808 | return _snd_pcm_new(card, id, device, playback_count, capture_count, |
| 809 | true, rpcm); |
| 810 | } |
| 811 | EXPORT_SYMBOL(snd_pcm_new_internal); |
| 812 | |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 813 | static void snd_pcm_free_stream(struct snd_pcm_str * pstr) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 814 | { |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 815 | struct snd_pcm_substream *substream, *substream_next; |
Takashi Iwai | 8eeaa2f | 2014-02-10 09:48:47 +0100 | [diff] [blame] | 816 | #if IS_ENABLED(CONFIG_SND_PCM_OSS) |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 817 | struct snd_pcm_oss_setup *setup, *setupn; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 818 | #endif |
| 819 | substream = pstr->substream; |
| 820 | while (substream) { |
| 821 | substream_next = substream->next; |
Takashi Iwai | c461482 | 2006-06-23 14:38:23 +0200 | [diff] [blame] | 822 | snd_pcm_timer_done(substream); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 823 | snd_pcm_substream_proc_done(substream); |
| 824 | kfree(substream); |
| 825 | substream = substream_next; |
| 826 | } |
| 827 | snd_pcm_stream_proc_done(pstr); |
Takashi Iwai | 8eeaa2f | 2014-02-10 09:48:47 +0100 | [diff] [blame] | 828 | #if IS_ENABLED(CONFIG_SND_PCM_OSS) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 829 | for (setup = pstr->oss.setup_list; setup; setup = setupn) { |
| 830 | setupn = setup->next; |
| 831 | kfree(setup->task_name); |
| 832 | kfree(setup); |
| 833 | } |
| 834 | #endif |
| 835 | } |
| 836 | |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 837 | static int snd_pcm_free(struct snd_pcm *pcm) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 838 | { |
Takashi Iwai | c461482 | 2006-06-23 14:38:23 +0200 | [diff] [blame] | 839 | struct snd_pcm_notify *notify; |
| 840 | |
Takashi Iwai | 7eaa943 | 2008-08-08 17:09:09 +0200 | [diff] [blame] | 841 | if (!pcm) |
| 842 | return 0; |
Takashi Iwai | c461482 | 2006-06-23 14:38:23 +0200 | [diff] [blame] | 843 | list_for_each_entry(notify, &snd_pcm_notify_list, list) { |
| 844 | notify->n_unregister(pcm); |
| 845 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 846 | if (pcm->private_free) |
| 847 | pcm->private_free(pcm); |
| 848 | snd_pcm_lib_preallocate_free_for_all(pcm); |
| 849 | snd_pcm_free_stream(&pcm->streams[SNDRV_PCM_STREAM_PLAYBACK]); |
| 850 | snd_pcm_free_stream(&pcm->streams[SNDRV_PCM_STREAM_CAPTURE]); |
| 851 | kfree(pcm); |
| 852 | return 0; |
| 853 | } |
| 854 | |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 855 | static int snd_pcm_dev_free(struct snd_device *device) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 856 | { |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 857 | struct snd_pcm *pcm = device->device_data; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 858 | return snd_pcm_free(pcm); |
| 859 | } |
| 860 | |
Takashi Iwai | 3bf75f9 | 2006-03-27 16:40:49 +0200 | [diff] [blame] | 861 | int snd_pcm_attach_substream(struct snd_pcm *pcm, int stream, |
| 862 | struct file *file, |
| 863 | struct snd_pcm_substream **rsubstream) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 864 | { |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 865 | struct snd_pcm_str * pstr; |
| 866 | struct snd_pcm_substream *substream; |
| 867 | struct snd_pcm_runtime *runtime; |
| 868 | struct snd_ctl_file *kctl; |
| 869 | struct snd_card *card; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 870 | int prefer_subdevice = -1; |
| 871 | size_t size; |
| 872 | |
Takashi Iwai | 7eaa943 | 2008-08-08 17:09:09 +0200 | [diff] [blame] | 873 | if (snd_BUG_ON(!pcm || !rsubstream)) |
| 874 | return -ENXIO; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 875 | *rsubstream = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 876 | pstr = &pcm->streams[stream]; |
Takashi Iwai | 3bf75f9 | 2006-03-27 16:40:49 +0200 | [diff] [blame] | 877 | if (pstr->substream == NULL || pstr->substream_count == 0) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 878 | return -ENODEV; |
| 879 | |
| 880 | card = pcm->card; |
Takashi Iwai | 399ccdc | 2008-09-25 14:51:03 +0200 | [diff] [blame] | 881 | read_lock(&card->ctl_files_rwlock); |
Johannes Berg | 9244b2c | 2006-10-05 16:02:22 +0200 | [diff] [blame] | 882 | list_for_each_entry(kctl, &card->ctl_files, list) { |
Clemens Ladisch | 25d27ed | 2009-11-02 09:35:44 +0100 | [diff] [blame] | 883 | if (kctl->pid == task_pid(current)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 884 | prefer_subdevice = kctl->prefer_pcm_subdevice; |
Takashi Iwai | 2529bba | 2006-08-04 12:57:19 +0200 | [diff] [blame] | 885 | if (prefer_subdevice != -1) |
| 886 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 887 | } |
| 888 | } |
Takashi Iwai | 399ccdc | 2008-09-25 14:51:03 +0200 | [diff] [blame] | 889 | read_unlock(&card->ctl_files_rwlock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 890 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 891 | switch (stream) { |
| 892 | case SNDRV_PCM_STREAM_PLAYBACK: |
| 893 | if (pcm->info_flags & SNDRV_PCM_INFO_HALF_DUPLEX) { |
| 894 | for (substream = pcm->streams[SNDRV_PCM_STREAM_CAPTURE].substream; substream; substream = substream->next) { |
| 895 | if (SUBSTREAM_BUSY(substream)) |
| 896 | return -EAGAIN; |
| 897 | } |
| 898 | } |
| 899 | break; |
| 900 | case SNDRV_PCM_STREAM_CAPTURE: |
| 901 | if (pcm->info_flags & SNDRV_PCM_INFO_HALF_DUPLEX) { |
| 902 | for (substream = pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream; substream; substream = substream->next) { |
| 903 | if (SUBSTREAM_BUSY(substream)) |
| 904 | return -EAGAIN; |
| 905 | } |
| 906 | } |
| 907 | break; |
| 908 | default: |
| 909 | return -EINVAL; |
| 910 | } |
| 911 | |
Takashi Iwai | 0df63e4 | 2006-04-28 15:13:41 +0200 | [diff] [blame] | 912 | if (file->f_flags & O_APPEND) { |
| 913 | if (prefer_subdevice < 0) { |
| 914 | if (pstr->substream_count > 1) |
| 915 | return -EINVAL; /* must be unique */ |
| 916 | substream = pstr->substream; |
| 917 | } else { |
| 918 | for (substream = pstr->substream; substream; |
| 919 | substream = substream->next) |
| 920 | if (substream->number == prefer_subdevice) |
| 921 | break; |
| 922 | } |
| 923 | if (! substream) |
| 924 | return -ENODEV; |
| 925 | if (! SUBSTREAM_BUSY(substream)) |
| 926 | return -EBADFD; |
| 927 | substream->ref_count++; |
| 928 | *rsubstream = substream; |
| 929 | return 0; |
| 930 | } |
| 931 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 932 | if (prefer_subdevice >= 0) { |
| 933 | for (substream = pstr->substream; substream; substream = substream->next) |
| 934 | if (!SUBSTREAM_BUSY(substream) && substream->number == prefer_subdevice) |
| 935 | goto __ok; |
| 936 | } |
| 937 | for (substream = pstr->substream; substream; substream = substream->next) |
| 938 | if (!SUBSTREAM_BUSY(substream)) |
| 939 | break; |
| 940 | __ok: |
| 941 | if (substream == NULL) |
| 942 | return -EAGAIN; |
| 943 | |
Takashi Iwai | ca2c096 | 2005-09-09 14:20:23 +0200 | [diff] [blame] | 944 | runtime = kzalloc(sizeof(*runtime), GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 945 | if (runtime == NULL) |
| 946 | return -ENOMEM; |
| 947 | |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 948 | size = PAGE_ALIGN(sizeof(struct snd_pcm_mmap_status)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 949 | runtime->status = snd_malloc_pages(size, GFP_KERNEL); |
| 950 | if (runtime->status == NULL) { |
| 951 | kfree(runtime); |
| 952 | return -ENOMEM; |
| 953 | } |
| 954 | memset((void*)runtime->status, 0, size); |
| 955 | |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 956 | size = PAGE_ALIGN(sizeof(struct snd_pcm_mmap_control)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 957 | runtime->control = snd_malloc_pages(size, GFP_KERNEL); |
| 958 | if (runtime->control == NULL) { |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 959 | snd_free_pages((void*)runtime->status, |
| 960 | PAGE_ALIGN(sizeof(struct snd_pcm_mmap_status))); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 961 | kfree(runtime); |
| 962 | return -ENOMEM; |
| 963 | } |
| 964 | memset((void*)runtime->control, 0, size); |
| 965 | |
| 966 | init_waitqueue_head(&runtime->sleep); |
Jaroslav Kysela | c91a988 | 2010-01-21 10:32:15 +0100 | [diff] [blame] | 967 | init_waitqueue_head(&runtime->tsleep); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 968 | |
| 969 | runtime->status->state = SNDRV_PCM_STATE_OPEN; |
| 970 | |
| 971 | substream->runtime = runtime; |
| 972 | substream->private_data = pcm->private_data; |
Takashi Iwai | 0df63e4 | 2006-04-28 15:13:41 +0200 | [diff] [blame] | 973 | substream->ref_count = 1; |
| 974 | substream->f_flags = file->f_flags; |
Clemens Ladisch | e7373b7 | 2009-11-10 10:13:30 +0100 | [diff] [blame] | 975 | substream->pid = get_pid(task_pid(current)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 976 | pstr->substream_opened++; |
| 977 | *rsubstream = substream; |
| 978 | return 0; |
| 979 | } |
| 980 | |
Takashi Iwai | 3bf75f9 | 2006-03-27 16:40:49 +0200 | [diff] [blame] | 981 | void snd_pcm_detach_substream(struct snd_pcm_substream *substream) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 982 | { |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 983 | struct snd_pcm_runtime *runtime; |
Takashi Iwai | 0df63e4 | 2006-04-28 15:13:41 +0200 | [diff] [blame] | 984 | |
Takashi Iwai | 7eaa943 | 2008-08-08 17:09:09 +0200 | [diff] [blame] | 985 | if (PCM_RUNTIME_CHECK(substream)) |
| 986 | return; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 987 | runtime = substream->runtime; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 988 | if (runtime->private_free != NULL) |
| 989 | runtime->private_free(runtime); |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 990 | snd_free_pages((void*)runtime->status, |
| 991 | PAGE_ALIGN(sizeof(struct snd_pcm_mmap_status))); |
| 992 | snd_free_pages((void*)runtime->control, |
| 993 | PAGE_ALIGN(sizeof(struct snd_pcm_mmap_control))); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 994 | kfree(runtime->hw_constraints.rules); |
Jaroslav Kysela | 4d96eb2 | 2009-12-20 11:47:57 +0100 | [diff] [blame] | 995 | #ifdef CONFIG_SND_PCM_XRUN_DEBUG |
Sachin Kamat | 51d503d | 2012-11-21 14:36:54 +0530 | [diff] [blame] | 996 | kfree(runtime->hwptr_log); |
Jaroslav Kysela | 4d96eb2 | 2009-12-20 11:47:57 +0100 | [diff] [blame] | 997 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 998 | kfree(runtime); |
| 999 | substream->runtime = NULL; |
Clemens Ladisch | e7373b7 | 2009-11-10 10:13:30 +0100 | [diff] [blame] | 1000 | put_pid(substream->pid); |
| 1001 | substream->pid = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1002 | substream->pstr->substream_opened--; |
| 1003 | } |
| 1004 | |
Greg Kroah-Hartman | d80f19f | 2006-08-07 22:19:37 -0700 | [diff] [blame] | 1005 | static ssize_t show_pcm_class(struct device *dev, |
| 1006 | struct device_attribute *attr, char *buf) |
Takashi Iwai | 9d19f48 | 2006-09-06 14:27:46 +0200 | [diff] [blame] | 1007 | { |
| 1008 | struct snd_pcm *pcm; |
| 1009 | const char *str; |
| 1010 | static const char *strs[SNDRV_PCM_CLASS_LAST + 1] = { |
| 1011 | [SNDRV_PCM_CLASS_GENERIC] = "generic", |
| 1012 | [SNDRV_PCM_CLASS_MULTI] = "multi", |
| 1013 | [SNDRV_PCM_CLASS_MODEM] = "modem", |
| 1014 | [SNDRV_PCM_CLASS_DIGITIZER] = "digitizer", |
| 1015 | }; |
| 1016 | |
Greg Kroah-Hartman | d80f19f | 2006-08-07 22:19:37 -0700 | [diff] [blame] | 1017 | if (! (pcm = dev_get_drvdata(dev)) || |
Takashi Iwai | 9d19f48 | 2006-09-06 14:27:46 +0200 | [diff] [blame] | 1018 | pcm->dev_class > SNDRV_PCM_CLASS_LAST) |
| 1019 | str = "none"; |
| 1020 | else |
| 1021 | str = strs[pcm->dev_class]; |
| 1022 | return snprintf(buf, PAGE_SIZE, "%s\n", str); |
| 1023 | } |
| 1024 | |
Takashi Iwai | caa751b | 2014-02-25 08:30:50 +0100 | [diff] [blame] | 1025 | static DEVICE_ATTR(pcm_class, S_IRUGO, show_pcm_class, NULL); |
| 1026 | static struct attribute *pcm_dev_attrs[] = { |
| 1027 | &dev_attr_pcm_class.attr, |
| 1028 | NULL |
| 1029 | }; |
| 1030 | |
| 1031 | static struct attribute_group pcm_dev_attr_group = { |
| 1032 | .attrs = pcm_dev_attrs, |
| 1033 | }; |
| 1034 | |
| 1035 | static const struct attribute_group *pcm_dev_attr_groups[] = { |
| 1036 | &pcm_dev_attr_group, |
| 1037 | NULL |
| 1038 | }; |
Takashi Iwai | 9d19f48 | 2006-09-06 14:27:46 +0200 | [diff] [blame] | 1039 | |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 1040 | static int snd_pcm_dev_register(struct snd_device *device) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1041 | { |
Clemens Ladisch | f87135f | 2005-11-20 14:06:59 +0100 | [diff] [blame] | 1042 | int cidx, err; |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 1043 | struct snd_pcm_substream *substream; |
Johannes Berg | 9244b2c | 2006-10-05 16:02:22 +0200 | [diff] [blame] | 1044 | struct snd_pcm_notify *notify; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1045 | char str[16]; |
Julia Lawall | 4b3be6a | 2009-10-17 08:33:22 +0200 | [diff] [blame] | 1046 | struct snd_pcm *pcm; |
Johannes Berg | c78085f | 2006-10-05 15:06:34 +0200 | [diff] [blame] | 1047 | struct device *dev; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1048 | |
Julia Lawall | 4b3be6a | 2009-10-17 08:33:22 +0200 | [diff] [blame] | 1049 | if (snd_BUG_ON(!device || !device->device_data)) |
Takashi Iwai | 7eaa943 | 2008-08-08 17:09:09 +0200 | [diff] [blame] | 1050 | return -ENXIO; |
Julia Lawall | 4b3be6a | 2009-10-17 08:33:22 +0200 | [diff] [blame] | 1051 | pcm = device->device_data; |
Ingo Molnar | 1a60d4c | 2006-01-16 16:29:08 +0100 | [diff] [blame] | 1052 | mutex_lock(®ister_mutex); |
Pawel MOLL | f90c06a | 2008-07-30 12:46:40 +0100 | [diff] [blame] | 1053 | err = snd_pcm_add(pcm); |
| 1054 | if (err) { |
Ingo Molnar | 1a60d4c | 2006-01-16 16:29:08 +0100 | [diff] [blame] | 1055 | mutex_unlock(®ister_mutex); |
Pawel MOLL | f90c06a | 2008-07-30 12:46:40 +0100 | [diff] [blame] | 1056 | return err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1057 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1058 | for (cidx = 0; cidx < 2; cidx++) { |
| 1059 | int devtype = -1; |
Liam Girdwood | 945e503 | 2012-02-08 20:33:31 +0000 | [diff] [blame] | 1060 | if (pcm->streams[cidx].substream == NULL || pcm->internal) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1061 | continue; |
| 1062 | switch (cidx) { |
| 1063 | case SNDRV_PCM_STREAM_PLAYBACK: |
| 1064 | sprintf(str, "pcmC%iD%ip", pcm->card->number, pcm->device); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1065 | devtype = SNDRV_DEVICE_TYPE_PCM_PLAYBACK; |
| 1066 | break; |
| 1067 | case SNDRV_PCM_STREAM_CAPTURE: |
| 1068 | sprintf(str, "pcmC%iD%ic", pcm->card->number, pcm->device); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1069 | devtype = SNDRV_DEVICE_TYPE_PCM_CAPTURE; |
| 1070 | break; |
| 1071 | } |
Johannes Berg | c78085f | 2006-10-05 15:06:34 +0200 | [diff] [blame] | 1072 | /* device pointer to use, pcm->dev takes precedence if |
| 1073 | * it is assigned, otherwise fall back to card's device |
| 1074 | * if possible */ |
| 1075 | dev = pcm->dev; |
| 1076 | if (!dev) |
Takashi Iwai | c2902c8 | 2007-02-09 16:25:48 +0100 | [diff] [blame] | 1077 | dev = snd_card_get_device_link(pcm->card); |
Johannes Berg | c78085f | 2006-10-05 15:06:34 +0200 | [diff] [blame] | 1078 | /* register pcm */ |
| 1079 | err = snd_register_device_for_dev(devtype, pcm->card, |
| 1080 | pcm->device, |
| 1081 | &snd_pcm_f_ops[cidx], |
| 1082 | pcm, str, dev); |
| 1083 | if (err < 0) { |
Clemens Ladisch | f87135f | 2005-11-20 14:06:59 +0100 | [diff] [blame] | 1084 | list_del(&pcm->list); |
Ingo Molnar | 1a60d4c | 2006-01-16 16:29:08 +0100 | [diff] [blame] | 1085 | mutex_unlock(®ister_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1086 | return err; |
| 1087 | } |
Takashi Iwai | caa751b | 2014-02-25 08:30:50 +0100 | [diff] [blame] | 1088 | |
| 1089 | dev = snd_get_device(devtype, pcm->card, pcm->device); |
| 1090 | if (dev) { |
| 1091 | err = sysfs_create_groups(&dev->kobj, |
| 1092 | pcm_dev_attr_groups); |
| 1093 | if (err < 0) |
| 1094 | dev_warn(dev, |
| 1095 | "pcm %d:%d: cannot create sysfs groups\n", |
| 1096 | pcm->card->number, pcm->device); |
| 1097 | put_device(dev); |
| 1098 | } |
| 1099 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1100 | for (substream = pcm->streams[cidx].substream; substream; substream = substream->next) |
| 1101 | snd_pcm_timer_init(substream); |
| 1102 | } |
Johannes Berg | 9244b2c | 2006-10-05 16:02:22 +0200 | [diff] [blame] | 1103 | |
| 1104 | list_for_each_entry(notify, &snd_pcm_notify_list, list) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1105 | notify->n_register(pcm); |
Johannes Berg | 9244b2c | 2006-10-05 16:02:22 +0200 | [diff] [blame] | 1106 | |
Ingo Molnar | 1a60d4c | 2006-01-16 16:29:08 +0100 | [diff] [blame] | 1107 | mutex_unlock(®ister_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1108 | return 0; |
| 1109 | } |
| 1110 | |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 1111 | static int snd_pcm_dev_disconnect(struct snd_device *device) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1112 | { |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 1113 | struct snd_pcm *pcm = device->device_data; |
Takashi Iwai | c461482 | 2006-06-23 14:38:23 +0200 | [diff] [blame] | 1114 | struct snd_pcm_notify *notify; |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 1115 | struct snd_pcm_substream *substream; |
Takashi Iwai | c461482 | 2006-06-23 14:38:23 +0200 | [diff] [blame] | 1116 | int cidx, devtype; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1117 | |
Ingo Molnar | 1a60d4c | 2006-01-16 16:29:08 +0100 | [diff] [blame] | 1118 | mutex_lock(®ister_mutex); |
Takashi Iwai | c461482 | 2006-06-23 14:38:23 +0200 | [diff] [blame] | 1119 | if (list_empty(&pcm->list)) |
| 1120 | goto unlock; |
| 1121 | |
Takashi Iwai | 9b0573c0 | 2012-10-12 15:07:34 +0200 | [diff] [blame] | 1122 | mutex_lock(&pcm->open_mutex); |
Takashi Iwai | 0914f79 | 2012-10-16 16:43:39 +0200 | [diff] [blame] | 1123 | wake_up(&pcm->open_wait); |
Clemens Ladisch | f87135f | 2005-11-20 14:06:59 +0100 | [diff] [blame] | 1124 | list_del_init(&pcm->list); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1125 | for (cidx = 0; cidx < 2; cidx++) |
Takashi Iwai | 9b0573c0 | 2012-10-12 15:07:34 +0200 | [diff] [blame] | 1126 | for (substream = pcm->streams[cidx].substream; substream; substream = substream->next) { |
| 1127 | snd_pcm_stream_lock_irq(substream); |
Takashi Iwai | 0914f79 | 2012-10-16 16:43:39 +0200 | [diff] [blame] | 1128 | if (substream->runtime) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1129 | substream->runtime->status->state = SNDRV_PCM_STATE_DISCONNECTED; |
Takashi Iwai | 0914f79 | 2012-10-16 16:43:39 +0200 | [diff] [blame] | 1130 | wake_up(&substream->runtime->sleep); |
| 1131 | wake_up(&substream->runtime->tsleep); |
| 1132 | } |
Takashi Iwai | 9b0573c0 | 2012-10-12 15:07:34 +0200 | [diff] [blame] | 1133 | snd_pcm_stream_unlock_irq(substream); |
| 1134 | } |
Takashi Iwai | c461482 | 2006-06-23 14:38:23 +0200 | [diff] [blame] | 1135 | list_for_each_entry(notify, &snd_pcm_notify_list, list) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1136 | notify->n_disconnect(pcm); |
| 1137 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1138 | for (cidx = 0; cidx < 2; cidx++) { |
| 1139 | devtype = -1; |
| 1140 | switch (cidx) { |
| 1141 | case SNDRV_PCM_STREAM_PLAYBACK: |
| 1142 | devtype = SNDRV_DEVICE_TYPE_PCM_PLAYBACK; |
| 1143 | break; |
| 1144 | case SNDRV_PCM_STREAM_CAPTURE: |
| 1145 | devtype = SNDRV_DEVICE_TYPE_PCM_CAPTURE; |
| 1146 | break; |
| 1147 | } |
| 1148 | snd_unregister_device(devtype, pcm->card, pcm->device); |
Takashi Iwai | 2d3391e | 2012-07-27 18:27:00 +0200 | [diff] [blame] | 1149 | if (pcm->streams[cidx].chmap_kctl) { |
| 1150 | snd_ctl_remove(pcm->card, pcm->streams[cidx].chmap_kctl); |
| 1151 | pcm->streams[cidx].chmap_kctl = NULL; |
| 1152 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1153 | } |
Takashi Iwai | 9b0573c0 | 2012-10-12 15:07:34 +0200 | [diff] [blame] | 1154 | mutex_unlock(&pcm->open_mutex); |
Takashi Iwai | c461482 | 2006-06-23 14:38:23 +0200 | [diff] [blame] | 1155 | unlock: |
Ingo Molnar | 1a60d4c | 2006-01-16 16:29:08 +0100 | [diff] [blame] | 1156 | mutex_unlock(®ister_mutex); |
Takashi Iwai | c461482 | 2006-06-23 14:38:23 +0200 | [diff] [blame] | 1157 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1158 | } |
| 1159 | |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 1160 | int snd_pcm_notify(struct snd_pcm_notify *notify, int nfree) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1161 | { |
Johannes Berg | 9244b2c | 2006-10-05 16:02:22 +0200 | [diff] [blame] | 1162 | struct snd_pcm *pcm; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1163 | |
Takashi Iwai | 7eaa943 | 2008-08-08 17:09:09 +0200 | [diff] [blame] | 1164 | if (snd_BUG_ON(!notify || |
| 1165 | !notify->n_register || |
| 1166 | !notify->n_unregister || |
| 1167 | !notify->n_disconnect)) |
| 1168 | return -EINVAL; |
Ingo Molnar | 1a60d4c | 2006-01-16 16:29:08 +0100 | [diff] [blame] | 1169 | mutex_lock(®ister_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1170 | if (nfree) { |
| 1171 | list_del(¬ify->list); |
Johannes Berg | 9244b2c | 2006-10-05 16:02:22 +0200 | [diff] [blame] | 1172 | list_for_each_entry(pcm, &snd_pcm_devices, list) |
| 1173 | notify->n_unregister(pcm); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1174 | } else { |
| 1175 | list_add_tail(¬ify->list, &snd_pcm_notify_list); |
Johannes Berg | 9244b2c | 2006-10-05 16:02:22 +0200 | [diff] [blame] | 1176 | list_for_each_entry(pcm, &snd_pcm_devices, list) |
| 1177 | notify->n_register(pcm); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1178 | } |
Ingo Molnar | 1a60d4c | 2006-01-16 16:29:08 +0100 | [diff] [blame] | 1179 | mutex_unlock(®ister_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1180 | return 0; |
| 1181 | } |
| 1182 | |
Takashi Iwai | e88e8ae6 | 2006-04-28 15:13:40 +0200 | [diff] [blame] | 1183 | EXPORT_SYMBOL(snd_pcm_notify); |
| 1184 | |
Takashi Iwai | e28563c | 2005-12-01 10:42:42 +0100 | [diff] [blame] | 1185 | #ifdef CONFIG_PROC_FS |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1186 | /* |
| 1187 | * Info interface |
| 1188 | */ |
| 1189 | |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 1190 | static void snd_pcm_proc_read(struct snd_info_entry *entry, |
| 1191 | struct snd_info_buffer *buffer) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1192 | { |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 1193 | struct snd_pcm *pcm; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1194 | |
Ingo Molnar | 1a60d4c | 2006-01-16 16:29:08 +0100 | [diff] [blame] | 1195 | mutex_lock(®ister_mutex); |
Johannes Berg | 9244b2c | 2006-10-05 16:02:22 +0200 | [diff] [blame] | 1196 | list_for_each_entry(pcm, &snd_pcm_devices, list) { |
Clemens Ladisch | f87135f | 2005-11-20 14:06:59 +0100 | [diff] [blame] | 1197 | snd_iprintf(buffer, "%02i-%02i: %s : %s", |
| 1198 | pcm->card->number, pcm->device, pcm->id, pcm->name); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1199 | if (pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream) |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 1200 | snd_iprintf(buffer, " : playback %i", |
| 1201 | pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream_count); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1202 | if (pcm->streams[SNDRV_PCM_STREAM_CAPTURE].substream) |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 1203 | snd_iprintf(buffer, " : capture %i", |
| 1204 | pcm->streams[SNDRV_PCM_STREAM_CAPTURE].substream_count); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1205 | snd_iprintf(buffer, "\n"); |
| 1206 | } |
Ingo Molnar | 1a60d4c | 2006-01-16 16:29:08 +0100 | [diff] [blame] | 1207 | mutex_unlock(®ister_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1208 | } |
| 1209 | |
Takashi Iwai | 6581f4e | 2006-05-17 17:14:51 +0200 | [diff] [blame] | 1210 | static struct snd_info_entry *snd_pcm_proc_entry; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1211 | |
Takashi Iwai | e28563c | 2005-12-01 10:42:42 +0100 | [diff] [blame] | 1212 | static void snd_pcm_proc_init(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1213 | { |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 1214 | struct snd_info_entry *entry; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1215 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1216 | if ((entry = snd_info_create_module_entry(THIS_MODULE, "pcm", NULL)) != NULL) { |
Takashi Iwai | bf85020 | 2006-04-28 15:13:41 +0200 | [diff] [blame] | 1217 | snd_info_set_text_ops(entry, NULL, snd_pcm_proc_read); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1218 | if (snd_info_register(entry) < 0) { |
| 1219 | snd_info_free_entry(entry); |
| 1220 | entry = NULL; |
| 1221 | } |
| 1222 | } |
| 1223 | snd_pcm_proc_entry = entry; |
Takashi Iwai | e28563c | 2005-12-01 10:42:42 +0100 | [diff] [blame] | 1224 | } |
| 1225 | |
| 1226 | static void snd_pcm_proc_done(void) |
| 1227 | { |
Takashi Iwai | 746d4a0 | 2006-06-23 14:37:59 +0200 | [diff] [blame] | 1228 | snd_info_free_entry(snd_pcm_proc_entry); |
Takashi Iwai | e28563c | 2005-12-01 10:42:42 +0100 | [diff] [blame] | 1229 | } |
| 1230 | |
| 1231 | #else /* !CONFIG_PROC_FS */ |
| 1232 | #define snd_pcm_proc_init() |
| 1233 | #define snd_pcm_proc_done() |
| 1234 | #endif /* CONFIG_PROC_FS */ |
| 1235 | |
| 1236 | |
| 1237 | /* |
| 1238 | * ENTRY functions |
| 1239 | */ |
| 1240 | |
| 1241 | static int __init alsa_pcm_init(void) |
| 1242 | { |
| 1243 | snd_ctl_register_ioctl(snd_pcm_control_ioctl); |
| 1244 | snd_ctl_register_ioctl_compat(snd_pcm_control_ioctl); |
| 1245 | snd_pcm_proc_init(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1246 | return 0; |
| 1247 | } |
| 1248 | |
| 1249 | static void __exit alsa_pcm_exit(void) |
| 1250 | { |
| 1251 | snd_ctl_unregister_ioctl(snd_pcm_control_ioctl); |
| 1252 | snd_ctl_unregister_ioctl_compat(snd_pcm_control_ioctl); |
Takashi Iwai | e28563c | 2005-12-01 10:42:42 +0100 | [diff] [blame] | 1253 | snd_pcm_proc_done(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1254 | } |
| 1255 | |
| 1256 | module_init(alsa_pcm_init) |
| 1257 | module_exit(alsa_pcm_exit) |