Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * Advanced Linux Sound Architecture |
| 3 | * Copyright (c) by Jaroslav Kysela <perex@suse.cz> |
| 4 | * |
| 5 | * |
| 6 | * This program is free software; you can redistribute it and/or modify |
| 7 | * it under the terms of the GNU General Public License as published by |
| 8 | * the Free Software Foundation; either version 2 of the License, or |
| 9 | * (at your option) any later version. |
| 10 | * |
| 11 | * This program is distributed in the hope that it will be useful, |
| 12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 14 | * GNU General Public License for more details. |
| 15 | * |
| 16 | * You should have received a copy of the GNU General Public License |
| 17 | * along with this program; if not, write to the Free Software |
| 18 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
| 19 | * |
| 20 | */ |
| 21 | |
| 22 | #include <sound/driver.h> |
| 23 | #include <linux/init.h> |
| 24 | #include <linux/slab.h> |
| 25 | #include <linux/time.h> |
Takashi Iwai | 9a1a2a1 | 2005-11-22 15:46:41 +0100 | [diff] [blame] | 26 | #include <linux/device.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 27 | #include <linux/moduleparam.h> |
| 28 | #include <sound/core.h> |
| 29 | #include <sound/minors.h> |
| 30 | #include <sound/info.h> |
| 31 | #include <sound/version.h> |
| 32 | #include <sound/control.h> |
| 33 | #include <sound/initval.h> |
| 34 | #include <linux/kmod.h> |
Ingo Molnar | 1a60d4c | 2006-01-16 16:29:08 +0100 | [diff] [blame] | 35 | #include <linux/mutex.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 36 | |
| 37 | #define SNDRV_OS_MINORS 256 |
| 38 | |
| 39 | static int major = CONFIG_SND_MAJOR; |
| 40 | int snd_major; |
Takashi Iwai | c0d3fb3 | 2006-04-28 15:13:39 +0200 | [diff] [blame] | 41 | EXPORT_SYMBOL(snd_major); |
| 42 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 43 | static int cards_limit = 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 44 | |
| 45 | MODULE_AUTHOR("Jaroslav Kysela <perex@suse.cz>"); |
| 46 | MODULE_DESCRIPTION("Advanced Linux Sound Architecture driver for soundcards."); |
| 47 | MODULE_LICENSE("GPL"); |
| 48 | module_param(major, int, 0444); |
| 49 | MODULE_PARM_DESC(major, "Major # for sound driver."); |
| 50 | module_param(cards_limit, int, 0444); |
| 51 | MODULE_PARM_DESC(cards_limit, "Count of auto-loadable soundcards."); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 52 | MODULE_ALIAS_CHARDEV_MAJOR(CONFIG_SND_MAJOR); |
| 53 | |
| 54 | /* this one holds the actual max. card number currently available. |
| 55 | * as default, it's identical with cards_limit option. when more |
| 56 | * modules are loaded manually, this limit number increases, too. |
| 57 | */ |
| 58 | int snd_ecards_limit; |
Takashi Iwai | c0d3fb3 | 2006-04-28 15:13:39 +0200 | [diff] [blame] | 59 | EXPORT_SYMBOL(snd_ecards_limit); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 60 | |
Clemens Ladisch | 6983b72 | 2005-11-20 14:05:49 +0100 | [diff] [blame] | 61 | static struct snd_minor *snd_minors[SNDRV_OS_MINORS]; |
Ingo Molnar | 1a60d4c | 2006-01-16 16:29:08 +0100 | [diff] [blame] | 62 | static DEFINE_MUTEX(sound_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 63 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 64 | #ifdef CONFIG_KMOD |
| 65 | |
| 66 | /** |
| 67 | * snd_request_card - try to load the card module |
| 68 | * @card: the card number |
| 69 | * |
| 70 | * Tries to load the module "snd-card-X" for the given card number |
| 71 | * via KMOD. Returns immediately if already loaded. |
| 72 | */ |
| 73 | void snd_request_card(int card) |
| 74 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 75 | if (! current->fs->root) |
| 76 | return; |
Takashi Iwai | 746df94 | 2006-05-15 19:49:05 +0200 | [diff] [blame] | 77 | if (snd_card_locked(card)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 78 | return; |
| 79 | if (card < 0 || card >= cards_limit) |
| 80 | return; |
| 81 | request_module("snd-card-%i", card); |
| 82 | } |
| 83 | |
Takashi Iwai | c0d3fb3 | 2006-04-28 15:13:39 +0200 | [diff] [blame] | 84 | EXPORT_SYMBOL(snd_request_card); |
| 85 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 86 | static void snd_request_other(int minor) |
| 87 | { |
| 88 | char *str; |
| 89 | |
| 90 | if (! current->fs->root) |
| 91 | return; |
| 92 | switch (minor) { |
| 93 | case SNDRV_MINOR_SEQUENCER: str = "snd-seq"; break; |
| 94 | case SNDRV_MINOR_TIMER: str = "snd-timer"; break; |
| 95 | default: return; |
| 96 | } |
| 97 | request_module(str); |
| 98 | } |
| 99 | |
| 100 | #endif /* request_module support */ |
| 101 | |
Clemens Ladisch | f87135f | 2005-11-20 14:06:59 +0100 | [diff] [blame] | 102 | /** |
| 103 | * snd_lookup_minor_data - get user data of a registered device |
| 104 | * @minor: the minor number |
| 105 | * @type: device type (SNDRV_DEVICE_TYPE_XXX) |
| 106 | * |
| 107 | * Checks that a minor device with the specified type is registered, and returns |
| 108 | * its user data pointer. |
| 109 | */ |
| 110 | void *snd_lookup_minor_data(unsigned int minor, int type) |
| 111 | { |
| 112 | struct snd_minor *mreg; |
| 113 | void *private_data; |
| 114 | |
Adrian Bunk | 3a63e444 | 2006-03-13 14:14:10 +0100 | [diff] [blame] | 115 | if (minor >= ARRAY_SIZE(snd_minors)) |
Clemens Ladisch | f87135f | 2005-11-20 14:06:59 +0100 | [diff] [blame] | 116 | return NULL; |
Ingo Molnar | 1a60d4c | 2006-01-16 16:29:08 +0100 | [diff] [blame] | 117 | mutex_lock(&sound_mutex); |
Clemens Ladisch | f87135f | 2005-11-20 14:06:59 +0100 | [diff] [blame] | 118 | mreg = snd_minors[minor]; |
| 119 | if (mreg && mreg->type == type) |
| 120 | private_data = mreg->private_data; |
| 121 | else |
| 122 | private_data = NULL; |
Ingo Molnar | 1a60d4c | 2006-01-16 16:29:08 +0100 | [diff] [blame] | 123 | mutex_unlock(&sound_mutex); |
Clemens Ladisch | f87135f | 2005-11-20 14:06:59 +0100 | [diff] [blame] | 124 | return private_data; |
| 125 | } |
| 126 | |
Takashi Iwai | c0d3fb3 | 2006-04-28 15:13:39 +0200 | [diff] [blame] | 127 | EXPORT_SYMBOL(snd_lookup_minor_data); |
| 128 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 129 | static int snd_open(struct inode *inode, struct file *file) |
| 130 | { |
Clemens Ladisch | 332682b | 2005-11-20 14:07:47 +0100 | [diff] [blame] | 131 | unsigned int minor = iminor(inode); |
Takashi Iwai | 512bbd6 | 2005-11-17 13:51:18 +0100 | [diff] [blame] | 132 | struct snd_minor *mptr = NULL; |
Arjan van de Ven | 99ac48f | 2006-03-28 01:56:41 -0800 | [diff] [blame] | 133 | const struct file_operations *old_fops; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 134 | int err = 0; |
| 135 | |
Adrian Bunk | 3a63e444 | 2006-03-13 14:14:10 +0100 | [diff] [blame] | 136 | if (minor >= ARRAY_SIZE(snd_minors)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 137 | return -ENODEV; |
Clemens Ladisch | 332682b | 2005-11-20 14:07:47 +0100 | [diff] [blame] | 138 | mptr = snd_minors[minor]; |
| 139 | if (mptr == NULL) { |
| 140 | #ifdef CONFIG_KMOD |
| 141 | int dev = SNDRV_MINOR_DEVICE(minor); |
| 142 | if (dev == SNDRV_MINOR_CONTROL) { |
| 143 | /* /dev/aloadC? */ |
| 144 | int card = SNDRV_MINOR_CARD(minor); |
| 145 | if (snd_cards[card] == NULL) |
| 146 | snd_request_card(card); |
| 147 | } else if (dev == SNDRV_MINOR_GLOBAL) { |
| 148 | /* /dev/aloadSEQ */ |
| 149 | snd_request_other(minor); |
| 150 | } |
| 151 | #ifndef CONFIG_SND_DYNAMIC_MINORS |
| 152 | /* /dev/snd/{controlC?,seq} */ |
| 153 | mptr = snd_minors[minor]; |
| 154 | if (mptr == NULL) |
| 155 | #endif |
| 156 | #endif |
| 157 | return -ENODEV; |
| 158 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 159 | old_fops = file->f_op; |
| 160 | file->f_op = fops_get(mptr->f_ops); |
| 161 | if (file->f_op->open) |
| 162 | err = file->f_op->open(inode, file); |
| 163 | if (err) { |
| 164 | fops_put(file->f_op); |
| 165 | file->f_op = fops_get(old_fops); |
| 166 | } |
| 167 | fops_put(old_fops); |
| 168 | return err; |
| 169 | } |
| 170 | |
| 171 | static struct file_operations snd_fops = |
| 172 | { |
| 173 | .owner = THIS_MODULE, |
| 174 | .open = snd_open |
| 175 | }; |
| 176 | |
Clemens Ladisch | 332682b | 2005-11-20 14:07:47 +0100 | [diff] [blame] | 177 | #ifdef CONFIG_SND_DYNAMIC_MINORS |
| 178 | static int snd_find_free_minor(void) |
| 179 | { |
| 180 | int minor; |
| 181 | |
| 182 | for (minor = 0; minor < ARRAY_SIZE(snd_minors); ++minor) { |
| 183 | /* skip minors still used statically for autoloading devices */ |
| 184 | if (SNDRV_MINOR_DEVICE(minor) == SNDRV_MINOR_CONTROL || |
| 185 | minor == SNDRV_MINOR_SEQUENCER) |
| 186 | continue; |
| 187 | if (!snd_minors[minor]) |
| 188 | return minor; |
| 189 | } |
| 190 | return -EBUSY; |
| 191 | } |
| 192 | #else |
Takashi Iwai | 512bbd6 | 2005-11-17 13:51:18 +0100 | [diff] [blame] | 193 | static int snd_kernel_minor(int type, struct snd_card *card, int dev) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 194 | { |
| 195 | int minor; |
| 196 | |
| 197 | switch (type) { |
| 198 | case SNDRV_DEVICE_TYPE_SEQUENCER: |
| 199 | case SNDRV_DEVICE_TYPE_TIMER: |
| 200 | minor = type; |
| 201 | break; |
| 202 | case SNDRV_DEVICE_TYPE_CONTROL: |
| 203 | snd_assert(card != NULL, return -EINVAL); |
| 204 | minor = SNDRV_MINOR(card->number, type); |
| 205 | break; |
| 206 | case SNDRV_DEVICE_TYPE_HWDEP: |
| 207 | case SNDRV_DEVICE_TYPE_RAWMIDI: |
| 208 | case SNDRV_DEVICE_TYPE_PCM_PLAYBACK: |
| 209 | case SNDRV_DEVICE_TYPE_PCM_CAPTURE: |
| 210 | snd_assert(card != NULL, return -EINVAL); |
| 211 | minor = SNDRV_MINOR(card->number, type + dev); |
| 212 | break; |
| 213 | default: |
| 214 | return -EINVAL; |
| 215 | } |
| 216 | snd_assert(minor >= 0 && minor < SNDRV_OS_MINORS, return -EINVAL); |
| 217 | return minor; |
| 218 | } |
Clemens Ladisch | 332682b | 2005-11-20 14:07:47 +0100 | [diff] [blame] | 219 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 220 | |
| 221 | /** |
Johannes Berg | 12b131c | 2006-10-05 15:05:34 +0200 | [diff] [blame] | 222 | * snd_register_device_for_dev - Register the ALSA device file for the card |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 223 | * @type: the device type, SNDRV_DEVICE_TYPE_XXX |
| 224 | * @card: the card instance |
| 225 | * @dev: the device index |
Clemens Ladisch | 2af677f | 2005-11-20 14:03:48 +0100 | [diff] [blame] | 226 | * @f_ops: the file operations |
Clemens Ladisch | f87135f | 2005-11-20 14:06:59 +0100 | [diff] [blame] | 227 | * @private_data: user pointer for f_ops->open() |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 228 | * @name: the device file name |
Johannes Berg | 12b131c | 2006-10-05 15:05:34 +0200 | [diff] [blame] | 229 | * @device: the &struct device to link this new device to |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 230 | * |
| 231 | * Registers an ALSA device file for the given card. |
| 232 | * The operators have to be set in reg parameter. |
| 233 | * |
Johannes Berg | 12b131c | 2006-10-05 15:05:34 +0200 | [diff] [blame] | 234 | * Returns zero if successful, or a negative error code on failure. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 235 | */ |
Johannes Berg | 12b131c | 2006-10-05 15:05:34 +0200 | [diff] [blame] | 236 | int snd_register_device_for_dev(int type, struct snd_card *card, int dev, |
| 237 | const struct file_operations *f_ops, |
| 238 | void *private_data, |
| 239 | const char *name, struct device *device) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 240 | { |
Clemens Ladisch | 332682b | 2005-11-20 14:07:47 +0100 | [diff] [blame] | 241 | int minor; |
Takashi Iwai | 512bbd6 | 2005-11-17 13:51:18 +0100 | [diff] [blame] | 242 | struct snd_minor *preg; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 243 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 244 | snd_assert(name, return -EINVAL); |
Clemens Ladisch | 562b590 | 2006-07-05 11:24:22 +0200 | [diff] [blame] | 245 | preg = kmalloc(sizeof *preg, GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 246 | if (preg == NULL) |
| 247 | return -ENOMEM; |
Clemens Ladisch | 2af677f | 2005-11-20 14:03:48 +0100 | [diff] [blame] | 248 | preg->type = type; |
Clemens Ladisch | 6983b72 | 2005-11-20 14:05:49 +0100 | [diff] [blame] | 249 | preg->card = card ? card->number : -1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 250 | preg->device = dev; |
Clemens Ladisch | 2af677f | 2005-11-20 14:03:48 +0100 | [diff] [blame] | 251 | preg->f_ops = f_ops; |
Clemens Ladisch | f87135f | 2005-11-20 14:06:59 +0100 | [diff] [blame] | 252 | preg->private_data = private_data; |
Ingo Molnar | 1a60d4c | 2006-01-16 16:29:08 +0100 | [diff] [blame] | 253 | mutex_lock(&sound_mutex); |
Clemens Ladisch | 332682b | 2005-11-20 14:07:47 +0100 | [diff] [blame] | 254 | #ifdef CONFIG_SND_DYNAMIC_MINORS |
| 255 | minor = snd_find_free_minor(); |
| 256 | #else |
| 257 | minor = snd_kernel_minor(type, card, dev); |
| 258 | if (minor >= 0 && snd_minors[minor]) |
| 259 | minor = -EBUSY; |
| 260 | #endif |
| 261 | if (minor < 0) { |
Ingo Molnar | 1a60d4c | 2006-01-16 16:29:08 +0100 | [diff] [blame] | 262 | mutex_unlock(&sound_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 263 | kfree(preg); |
Clemens Ladisch | 332682b | 2005-11-20 14:07:47 +0100 | [diff] [blame] | 264 | return minor; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 265 | } |
Clemens Ladisch | 6983b72 | 2005-11-20 14:05:49 +0100 | [diff] [blame] | 266 | snd_minors[minor] = preg; |
Greg Kroah-Hartman | d80f19f | 2006-08-07 22:19:37 -0700 | [diff] [blame] | 267 | preg->dev = device_create(sound_class, device, MKDEV(major, minor), |
| 268 | "%s", name); |
| 269 | if (preg->dev) |
| 270 | dev_set_drvdata(preg->dev, private_data); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 271 | |
Ingo Molnar | 1a60d4c | 2006-01-16 16:29:08 +0100 | [diff] [blame] | 272 | mutex_unlock(&sound_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 273 | return 0; |
| 274 | } |
| 275 | |
Johannes Berg | 12b131c | 2006-10-05 15:05:34 +0200 | [diff] [blame] | 276 | EXPORT_SYMBOL(snd_register_device_for_dev); |
Takashi Iwai | c0d3fb3 | 2006-04-28 15:13:39 +0200 | [diff] [blame] | 277 | |
Takashi Iwai | 9d19f48 | 2006-09-06 14:27:46 +0200 | [diff] [blame] | 278 | /* find the matching minor record |
| 279 | * return the index of snd_minor, or -1 if not found |
| 280 | */ |
| 281 | static int find_snd_minor(int type, struct snd_card *card, int dev) |
| 282 | { |
| 283 | int cardnum, minor; |
| 284 | struct snd_minor *mptr; |
| 285 | |
| 286 | cardnum = card ? card->number : -1; |
| 287 | for (minor = 0; minor < ARRAY_SIZE(snd_minors); ++minor) |
| 288 | if ((mptr = snd_minors[minor]) != NULL && |
| 289 | mptr->type == type && |
| 290 | mptr->card == cardnum && |
| 291 | mptr->device == dev) |
| 292 | return minor; |
| 293 | return -1; |
| 294 | } |
| 295 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 296 | /** |
| 297 | * snd_unregister_device - unregister the device on the given card |
| 298 | * @type: the device type, SNDRV_DEVICE_TYPE_XXX |
| 299 | * @card: the card instance |
| 300 | * @dev: the device index |
| 301 | * |
| 302 | * Unregisters the device file already registered via |
| 303 | * snd_register_device(). |
| 304 | * |
| 305 | * Returns zero if sucecessful, or a negative error code on failure |
| 306 | */ |
Takashi Iwai | 512bbd6 | 2005-11-17 13:51:18 +0100 | [diff] [blame] | 307 | int snd_unregister_device(int type, struct snd_card *card, int dev) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 308 | { |
Takashi Iwai | 9d19f48 | 2006-09-06 14:27:46 +0200 | [diff] [blame] | 309 | int minor; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 310 | |
Ingo Molnar | 1a60d4c | 2006-01-16 16:29:08 +0100 | [diff] [blame] | 311 | mutex_lock(&sound_mutex); |
Takashi Iwai | 9d19f48 | 2006-09-06 14:27:46 +0200 | [diff] [blame] | 312 | minor = find_snd_minor(type, card, dev); |
| 313 | if (minor < 0) { |
Ingo Molnar | 1a60d4c | 2006-01-16 16:29:08 +0100 | [diff] [blame] | 314 | mutex_unlock(&sound_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 315 | return -EINVAL; |
| 316 | } |
| 317 | |
Greg Kroah-Hartman | d80f19f | 2006-08-07 22:19:37 -0700 | [diff] [blame] | 318 | device_destroy(sound_class, MKDEV(major, minor)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 319 | |
Takashi Iwai | 9d19f48 | 2006-09-06 14:27:46 +0200 | [diff] [blame] | 320 | kfree(snd_minors[minor]); |
Clemens Ladisch | 6983b72 | 2005-11-20 14:05:49 +0100 | [diff] [blame] | 321 | snd_minors[minor] = NULL; |
Ingo Molnar | 1a60d4c | 2006-01-16 16:29:08 +0100 | [diff] [blame] | 322 | mutex_unlock(&sound_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 323 | return 0; |
| 324 | } |
| 325 | |
Takashi Iwai | c0d3fb3 | 2006-04-28 15:13:39 +0200 | [diff] [blame] | 326 | EXPORT_SYMBOL(snd_unregister_device); |
| 327 | |
Takashi Iwai | 9d19f48 | 2006-09-06 14:27:46 +0200 | [diff] [blame] | 328 | int snd_add_device_sysfs_file(int type, struct snd_card *card, int dev, |
Greg Kroah-Hartman | d80f19f | 2006-08-07 22:19:37 -0700 | [diff] [blame] | 329 | struct device_attribute *attr) |
Takashi Iwai | 9d19f48 | 2006-09-06 14:27:46 +0200 | [diff] [blame] | 330 | { |
| 331 | int minor, ret = -EINVAL; |
Greg Kroah-Hartman | d80f19f | 2006-08-07 22:19:37 -0700 | [diff] [blame] | 332 | struct device *d; |
Takashi Iwai | 9d19f48 | 2006-09-06 14:27:46 +0200 | [diff] [blame] | 333 | |
| 334 | mutex_lock(&sound_mutex); |
| 335 | minor = find_snd_minor(type, card, dev); |
Greg Kroah-Hartman | d80f19f | 2006-08-07 22:19:37 -0700 | [diff] [blame] | 336 | if (minor >= 0 && (d = snd_minors[minor]->dev) != NULL) |
| 337 | ret = device_create_file(d, attr); |
Takashi Iwai | 9d19f48 | 2006-09-06 14:27:46 +0200 | [diff] [blame] | 338 | mutex_unlock(&sound_mutex); |
| 339 | return ret; |
| 340 | |
| 341 | } |
| 342 | |
| 343 | EXPORT_SYMBOL(snd_add_device_sysfs_file); |
| 344 | |
Takashi Iwai | e28563c | 2005-12-01 10:42:42 +0100 | [diff] [blame] | 345 | #ifdef CONFIG_PROC_FS |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 346 | /* |
| 347 | * INFO PART |
| 348 | */ |
| 349 | |
Takashi Iwai | 6581f4e | 2006-05-17 17:14:51 +0200 | [diff] [blame] | 350 | static struct snd_info_entry *snd_minor_info_entry; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 351 | |
Clemens Ladisch | 2af677f | 2005-11-20 14:03:48 +0100 | [diff] [blame] | 352 | static const char *snd_device_type_name(int type) |
| 353 | { |
| 354 | switch (type) { |
| 355 | case SNDRV_DEVICE_TYPE_CONTROL: |
| 356 | return "control"; |
| 357 | case SNDRV_DEVICE_TYPE_HWDEP: |
| 358 | return "hardware dependent"; |
| 359 | case SNDRV_DEVICE_TYPE_RAWMIDI: |
| 360 | return "raw midi"; |
| 361 | case SNDRV_DEVICE_TYPE_PCM_PLAYBACK: |
| 362 | return "digital audio playback"; |
| 363 | case SNDRV_DEVICE_TYPE_PCM_CAPTURE: |
| 364 | return "digital audio capture"; |
| 365 | case SNDRV_DEVICE_TYPE_SEQUENCER: |
| 366 | return "sequencer"; |
| 367 | case SNDRV_DEVICE_TYPE_TIMER: |
| 368 | return "timer"; |
| 369 | default: |
| 370 | return "?"; |
| 371 | } |
| 372 | } |
| 373 | |
Takashi Iwai | 512bbd6 | 2005-11-17 13:51:18 +0100 | [diff] [blame] | 374 | static void snd_minor_info_read(struct snd_info_entry *entry, struct snd_info_buffer *buffer) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 375 | { |
Clemens Ladisch | 6983b72 | 2005-11-20 14:05:49 +0100 | [diff] [blame] | 376 | int minor; |
Takashi Iwai | 512bbd6 | 2005-11-17 13:51:18 +0100 | [diff] [blame] | 377 | struct snd_minor *mptr; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 378 | |
Ingo Molnar | 1a60d4c | 2006-01-16 16:29:08 +0100 | [diff] [blame] | 379 | mutex_lock(&sound_mutex); |
Clemens Ladisch | 6983b72 | 2005-11-20 14:05:49 +0100 | [diff] [blame] | 380 | for (minor = 0; minor < SNDRV_OS_MINORS; ++minor) { |
| 381 | if (!(mptr = snd_minors[minor])) |
| 382 | continue; |
| 383 | if (mptr->card >= 0) { |
| 384 | if (mptr->device >= 0) |
Clemens Ladisch | d001544 | 2005-11-20 14:09:05 +0100 | [diff] [blame] | 385 | snd_iprintf(buffer, "%3i: [%2i-%2i]: %s\n", |
Clemens Ladisch | 6983b72 | 2005-11-20 14:05:49 +0100 | [diff] [blame] | 386 | minor, mptr->card, mptr->device, |
| 387 | snd_device_type_name(mptr->type)); |
| 388 | else |
Clemens Ladisch | d001544 | 2005-11-20 14:09:05 +0100 | [diff] [blame] | 389 | snd_iprintf(buffer, "%3i: [%2i] : %s\n", |
Clemens Ladisch | 6983b72 | 2005-11-20 14:05:49 +0100 | [diff] [blame] | 390 | minor, mptr->card, |
| 391 | snd_device_type_name(mptr->type)); |
| 392 | } else |
Clemens Ladisch | d001544 | 2005-11-20 14:09:05 +0100 | [diff] [blame] | 393 | snd_iprintf(buffer, "%3i: : %s\n", minor, |
Clemens Ladisch | 6983b72 | 2005-11-20 14:05:49 +0100 | [diff] [blame] | 394 | snd_device_type_name(mptr->type)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 395 | } |
Ingo Molnar | 1a60d4c | 2006-01-16 16:29:08 +0100 | [diff] [blame] | 396 | mutex_unlock(&sound_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 397 | } |
| 398 | |
| 399 | int __init snd_minor_info_init(void) |
| 400 | { |
Takashi Iwai | 512bbd6 | 2005-11-17 13:51:18 +0100 | [diff] [blame] | 401 | struct snd_info_entry *entry; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 402 | |
| 403 | entry = snd_info_create_module_entry(THIS_MODULE, "devices", NULL); |
| 404 | if (entry) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 405 | entry->c.text.read = snd_minor_info_read; |
| 406 | if (snd_info_register(entry) < 0) { |
| 407 | snd_info_free_entry(entry); |
| 408 | entry = NULL; |
| 409 | } |
| 410 | } |
| 411 | snd_minor_info_entry = entry; |
| 412 | return 0; |
| 413 | } |
| 414 | |
| 415 | int __exit snd_minor_info_done(void) |
| 416 | { |
Takashi Iwai | 746d4a0 | 2006-06-23 14:37:59 +0200 | [diff] [blame] | 417 | snd_info_free_entry(snd_minor_info_entry); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 418 | return 0; |
| 419 | } |
Takashi Iwai | e28563c | 2005-12-01 10:42:42 +0100 | [diff] [blame] | 420 | #endif /* CONFIG_PROC_FS */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 421 | |
| 422 | /* |
| 423 | * INIT PART |
| 424 | */ |
| 425 | |
| 426 | static int __init alsa_sound_init(void) |
| 427 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 428 | snd_major = major; |
| 429 | snd_ecards_limit = cards_limit; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 430 | if (register_chrdev(major, "alsa", &snd_fops)) { |
| 431 | snd_printk(KERN_ERR "unable to register native major device number %d\n", major); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 432 | return -EIO; |
| 433 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 434 | if (snd_info_init() < 0) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 435 | unregister_chrdev(major, "alsa"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 436 | return -ENOMEM; |
| 437 | } |
| 438 | snd_info_minor_register(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 439 | #ifndef MODULE |
| 440 | printk(KERN_INFO "Advanced Linux Sound Architecture Driver Version " CONFIG_SND_VERSION CONFIG_SND_DATE ".\n"); |
| 441 | #endif |
| 442 | return 0; |
| 443 | } |
| 444 | |
| 445 | static void __exit alsa_sound_exit(void) |
| 446 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 447 | snd_info_minor_unregister(); |
| 448 | snd_info_done(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 449 | if (unregister_chrdev(major, "alsa") != 0) |
| 450 | snd_printk(KERN_ERR "unable to unregister major device number %d\n", major); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 451 | } |
| 452 | |
| 453 | module_init(alsa_sound_init) |
| 454 | module_exit(alsa_sound_exit) |