Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * Initialization routines |
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/sched.h> |
| 24 | #include <linux/file.h> |
| 25 | #include <linux/slab.h> |
| 26 | #include <linux/time.h> |
| 27 | #include <linux/ctype.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 28 | #include <linux/pm.h> |
Russell King | d052d1b | 2005-10-29 19:07:23 +0100 | [diff] [blame] | 29 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 30 | #include <sound/core.h> |
| 31 | #include <sound/control.h> |
| 32 | #include <sound/info.h> |
| 33 | |
Karsten Wiese | a9edfc6 | 2006-10-06 16:08:27 +0200 | [diff] [blame] | 34 | static DEFINE_SPINLOCK(shutdown_lock); |
| 35 | static LIST_HEAD(shutdown_files); |
| 36 | |
Arjan van de Ven | 9c2e08c | 2007-02-12 00:55:37 -0800 | [diff] [blame] | 37 | static const struct file_operations snd_shutdown_f_ops; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 38 | |
Takashi Iwai | 6581f4e | 2006-05-17 17:14:51 +0200 | [diff] [blame] | 39 | static unsigned int snd_cards_lock; /* locked for registering/using */ |
| 40 | struct snd_card *snd_cards[SNDRV_CARDS]; |
Takashi Iwai | c0d3fb3 | 2006-04-28 15:13:39 +0200 | [diff] [blame] | 41 | EXPORT_SYMBOL(snd_cards); |
| 42 | |
Takashi Iwai | 746df94 | 2006-05-15 19:49:05 +0200 | [diff] [blame] | 43 | static DEFINE_MUTEX(snd_card_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 44 | |
Takashi Iwai | 304cd07 | 2007-10-26 15:10:15 +0200 | [diff] [blame] | 45 | static char *slots[SNDRV_CARDS]; |
| 46 | module_param_array(slots, charp, NULL, 0444); |
| 47 | MODULE_PARM_DESC(slots, "Module names assigned to the slots."); |
| 48 | |
Takashi Iwai | a93bbaa | 2008-05-27 17:59:24 +0200 | [diff] [blame] | 49 | /* return non-zero if the given index is reserved for the given |
Takashi Iwai | 304cd07 | 2007-10-26 15:10:15 +0200 | [diff] [blame] | 50 | * module via slots option |
| 51 | */ |
Takashi Iwai | a93bbaa | 2008-05-27 17:59:24 +0200 | [diff] [blame] | 52 | static int module_slot_match(struct module *module, int idx) |
Takashi Iwai | 304cd07 | 2007-10-26 15:10:15 +0200 | [diff] [blame] | 53 | { |
Takashi Iwai | a93bbaa | 2008-05-27 17:59:24 +0200 | [diff] [blame] | 54 | int match = 1; |
Takashi Iwai | 304cd07 | 2007-10-26 15:10:15 +0200 | [diff] [blame] | 55 | #ifdef MODULE |
Takashi Iwai | a93bbaa | 2008-05-27 17:59:24 +0200 | [diff] [blame] | 56 | const char *s1, *s2; |
| 57 | |
Takashi Iwai | 304cd07 | 2007-10-26 15:10:15 +0200 | [diff] [blame] | 58 | if (!module || !module->name || !slots[idx]) |
| 59 | return 0; |
Takashi Iwai | a93bbaa | 2008-05-27 17:59:24 +0200 | [diff] [blame] | 60 | |
| 61 | s1 = module->name; |
| 62 | s2 = slots[idx]; |
| 63 | if (*s2 == '!') { |
| 64 | match = 0; /* negative match */ |
| 65 | s2++; |
| 66 | } |
Takashi Iwai | 304cd07 | 2007-10-26 15:10:15 +0200 | [diff] [blame] | 67 | /* compare module name strings |
| 68 | * hyphens are handled as equivalent with underscore |
| 69 | */ |
| 70 | for (;;) { |
| 71 | char c1 = *s1++; |
| 72 | char c2 = *s2++; |
| 73 | if (c1 == '-') |
| 74 | c1 = '_'; |
| 75 | if (c2 == '-') |
| 76 | c2 = '_'; |
| 77 | if (c1 != c2) |
Takashi Iwai | a93bbaa | 2008-05-27 17:59:24 +0200 | [diff] [blame] | 78 | return !match; |
Takashi Iwai | 304cd07 | 2007-10-26 15:10:15 +0200 | [diff] [blame] | 79 | if (!c1) |
| 80 | break; |
| 81 | } |
Takashi Iwai | a93bbaa | 2008-05-27 17:59:24 +0200 | [diff] [blame] | 82 | #endif /* MODULE */ |
| 83 | return match; |
Takashi Iwai | 304cd07 | 2007-10-26 15:10:15 +0200 | [diff] [blame] | 84 | } |
| 85 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 86 | #if defined(CONFIG_SND_MIXER_OSS) || defined(CONFIG_SND_MIXER_OSS_MODULE) |
Takashi Iwai | 512bbd6 | 2005-11-17 13:51:18 +0100 | [diff] [blame] | 87 | int (*snd_mixer_oss_notify_callback)(struct snd_card *card, int free_flag); |
Takashi Iwai | c0d3fb3 | 2006-04-28 15:13:39 +0200 | [diff] [blame] | 88 | EXPORT_SYMBOL(snd_mixer_oss_notify_callback); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 89 | #endif |
| 90 | |
Takashi Iwai | e28563c | 2005-12-01 10:42:42 +0100 | [diff] [blame] | 91 | #ifdef CONFIG_PROC_FS |
Takashi Iwai | 512bbd6 | 2005-11-17 13:51:18 +0100 | [diff] [blame] | 92 | static void snd_card_id_read(struct snd_info_entry *entry, |
| 93 | struct snd_info_buffer *buffer) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 94 | { |
| 95 | snd_iprintf(buffer, "%s\n", entry->card->id); |
| 96 | } |
| 97 | |
Takashi Iwai | e28563c | 2005-12-01 10:42:42 +0100 | [diff] [blame] | 98 | static inline int init_info_for_card(struct snd_card *card) |
| 99 | { |
| 100 | int err; |
| 101 | struct snd_info_entry *entry; |
| 102 | |
| 103 | if ((err = snd_info_card_register(card)) < 0) { |
| 104 | snd_printd("unable to create card info\n"); |
| 105 | return err; |
| 106 | } |
| 107 | if ((entry = snd_info_create_card_entry(card, "id", card->proc_root)) == NULL) { |
| 108 | snd_printd("unable to create card entry\n"); |
| 109 | return err; |
| 110 | } |
Takashi Iwai | e28563c | 2005-12-01 10:42:42 +0100 | [diff] [blame] | 111 | entry->c.text.read = snd_card_id_read; |
| 112 | if (snd_info_register(entry) < 0) { |
| 113 | snd_info_free_entry(entry); |
| 114 | entry = NULL; |
| 115 | } |
| 116 | card->proc_id = entry; |
| 117 | return 0; |
| 118 | } |
| 119 | #else /* !CONFIG_PROC_FS */ |
| 120 | #define init_info_for_card(card) |
| 121 | #endif |
| 122 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 123 | /** |
Takashi Iwai | 53fb1e6 | 2008-12-28 16:32:08 +0100 | [diff] [blame] | 124 | * snd_card_create - create and initialize a soundcard structure |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 125 | * @idx: card index (address) [0 ... (SNDRV_CARDS-1)] |
| 126 | * @xid: card identification (ASCII string) |
| 127 | * @module: top level module for locking |
| 128 | * @extra_size: allocate this extra size after the main soundcard structure |
Takashi Iwai | 53fb1e6 | 2008-12-28 16:32:08 +0100 | [diff] [blame] | 129 | * @card_ret: the pointer to store the created card instance |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 130 | * |
| 131 | * Creates and initializes a soundcard structure. |
| 132 | * |
Takashi Iwai | 53fb1e6 | 2008-12-28 16:32:08 +0100 | [diff] [blame] | 133 | * The function allocates snd_card instance via kzalloc with the given |
| 134 | * space for the driver to use freely. The allocated struct is stored |
| 135 | * in the given card_ret pointer. |
| 136 | * |
| 137 | * Returns zero if successful or a negative error code. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 138 | */ |
Takashi Iwai | 53fb1e6 | 2008-12-28 16:32:08 +0100 | [diff] [blame] | 139 | int snd_card_create(int idx, const char *xid, |
| 140 | struct module *module, int extra_size, |
| 141 | struct snd_card **card_ret) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 142 | { |
Takashi Iwai | 512bbd6 | 2005-11-17 13:51:18 +0100 | [diff] [blame] | 143 | struct snd_card *card; |
Takashi Iwai | a93bbaa | 2008-05-27 17:59:24 +0200 | [diff] [blame] | 144 | int err, idx2; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 145 | |
Takashi Iwai | 53fb1e6 | 2008-12-28 16:32:08 +0100 | [diff] [blame] | 146 | if (snd_BUG_ON(!card_ret)) |
| 147 | return -EINVAL; |
| 148 | *card_ret = NULL; |
| 149 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 150 | if (extra_size < 0) |
| 151 | extra_size = 0; |
Takashi Iwai | ca2c096 | 2005-09-09 14:20:23 +0200 | [diff] [blame] | 152 | card = kzalloc(sizeof(*card) + extra_size, GFP_KERNEL); |
Takashi Iwai | 53fb1e6 | 2008-12-28 16:32:08 +0100 | [diff] [blame] | 153 | if (!card) |
| 154 | return -ENOMEM; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 155 | if (xid) { |
Takashi Iwai | 53fb1e6 | 2008-12-28 16:32:08 +0100 | [diff] [blame] | 156 | if (!snd_info_check_reserved_words(xid)) { |
| 157 | snd_printk(KERN_ERR |
| 158 | "given id string '%s' is reserved.\n", xid); |
| 159 | err = -EBUSY; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 160 | goto __error; |
Takashi Iwai | 53fb1e6 | 2008-12-28 16:32:08 +0100 | [diff] [blame] | 161 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 162 | strlcpy(card->id, xid, sizeof(card->id)); |
| 163 | } |
| 164 | err = 0; |
Takashi Iwai | 746df94 | 2006-05-15 19:49:05 +0200 | [diff] [blame] | 165 | mutex_lock(&snd_card_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 166 | if (idx < 0) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 167 | for (idx2 = 0; idx2 < SNDRV_CARDS; idx2++) |
Oliver Neukum | 5c33dd7 | 2007-01-16 17:49:21 +0100 | [diff] [blame] | 168 | /* idx == -1 == 0xffff means: take any free slot */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 169 | if (~snd_cards_lock & idx & 1<<idx2) { |
Takashi Iwai | a93bbaa | 2008-05-27 17:59:24 +0200 | [diff] [blame] | 170 | if (module_slot_match(module, idx2)) { |
| 171 | idx = idx2; |
| 172 | break; |
| 173 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 174 | } |
Oliver Neukum | 5c33dd7 | 2007-01-16 17:49:21 +0100 | [diff] [blame] | 175 | } |
Takashi Iwai | a93bbaa | 2008-05-27 17:59:24 +0200 | [diff] [blame] | 176 | if (idx < 0) { |
| 177 | for (idx2 = 0; idx2 < SNDRV_CARDS; idx2++) |
| 178 | /* idx == -1 == 0xffff means: take any free slot */ |
| 179 | if (~snd_cards_lock & idx & 1<<idx2) { |
| 180 | if (!slots[idx2] || !*slots[idx2]) { |
| 181 | idx = idx2; |
| 182 | break; |
| 183 | } |
| 184 | } |
| 185 | } |
| 186 | if (idx < 0) |
| 187 | err = -ENODEV; |
| 188 | else if (idx < snd_ecards_limit) { |
| 189 | if (snd_cards_lock & (1 << idx)) |
| 190 | err = -EBUSY; /* invalid */ |
| 191 | } else if (idx >= SNDRV_CARDS) |
| 192 | err = -ENODEV; |
| 193 | if (err < 0) { |
Takashi Iwai | 746df94 | 2006-05-15 19:49:05 +0200 | [diff] [blame] | 194 | mutex_unlock(&snd_card_mutex); |
Oliver Neukum | 5c33dd7 | 2007-01-16 17:49:21 +0100 | [diff] [blame] | 195 | snd_printk(KERN_ERR "cannot find the slot for index %d (range 0-%i), error: %d\n", |
| 196 | idx, snd_ecards_limit - 1, err); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 197 | goto __error; |
| 198 | } |
| 199 | snd_cards_lock |= 1 << idx; /* lock it */ |
Takashi Iwai | a93bbaa | 2008-05-27 17:59:24 +0200 | [diff] [blame] | 200 | if (idx >= snd_ecards_limit) |
| 201 | snd_ecards_limit = idx + 1; /* increase the limit */ |
Takashi Iwai | 746df94 | 2006-05-15 19:49:05 +0200 | [diff] [blame] | 202 | mutex_unlock(&snd_card_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 203 | card->number = idx; |
| 204 | card->module = module; |
| 205 | INIT_LIST_HEAD(&card->devices); |
| 206 | init_rwsem(&card->controls_rwsem); |
| 207 | rwlock_init(&card->ctl_files_rwlock); |
| 208 | INIT_LIST_HEAD(&card->controls); |
| 209 | INIT_LIST_HEAD(&card->ctl_files); |
| 210 | spin_lock_init(&card->files_lock); |
Takashi Iwai | 118dd6b | 2009-02-23 16:35:21 +0100 | [diff] [blame] | 211 | INIT_LIST_HEAD(&card->files_list); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 212 | init_waitqueue_head(&card->shutdown_sleep); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 213 | #ifdef CONFIG_PM |
Ingo Molnar | 1a60d4c | 2006-01-16 16:29:08 +0100 | [diff] [blame] | 214 | mutex_init(&card->power_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 215 | init_waitqueue_head(&card->power_sleep); |
| 216 | #endif |
| 217 | /* the control interface cannot be accessed from the user space until */ |
| 218 | /* snd_cards_bitmask and snd_cards are set with snd_card_register */ |
Takashi Iwai | 53fb1e6 | 2008-12-28 16:32:08 +0100 | [diff] [blame] | 219 | err = snd_ctl_create(card); |
| 220 | if (err < 0) { |
| 221 | snd_printk(KERN_ERR "unable to register control minors\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 222 | goto __error; |
| 223 | } |
Takashi Iwai | 53fb1e6 | 2008-12-28 16:32:08 +0100 | [diff] [blame] | 224 | err = snd_info_card_create(card); |
| 225 | if (err < 0) { |
| 226 | snd_printk(KERN_ERR "unable to create card info\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 227 | goto __error_ctl; |
| 228 | } |
| 229 | if (extra_size > 0) |
Takashi Iwai | 512bbd6 | 2005-11-17 13:51:18 +0100 | [diff] [blame] | 230 | card->private_data = (char *)card + sizeof(struct snd_card); |
Takashi Iwai | 53fb1e6 | 2008-12-28 16:32:08 +0100 | [diff] [blame] | 231 | *card_ret = card; |
| 232 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 233 | |
| 234 | __error_ctl: |
| 235 | snd_device_free_all(card, SNDRV_DEV_CMD_PRE); |
| 236 | __error: |
| 237 | kfree(card); |
Takashi Iwai | 53fb1e6 | 2008-12-28 16:32:08 +0100 | [diff] [blame] | 238 | return err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 239 | } |
Takashi Iwai | 53fb1e6 | 2008-12-28 16:32:08 +0100 | [diff] [blame] | 240 | EXPORT_SYMBOL(snd_card_create); |
Takashi Iwai | c0d3fb3 | 2006-04-28 15:13:39 +0200 | [diff] [blame] | 241 | |
Takashi Iwai | 746df94 | 2006-05-15 19:49:05 +0200 | [diff] [blame] | 242 | /* return non-zero if a card is already locked */ |
| 243 | int snd_card_locked(int card) |
| 244 | { |
| 245 | int locked; |
| 246 | |
| 247 | mutex_lock(&snd_card_mutex); |
| 248 | locked = snd_cards_lock & (1 << card); |
| 249 | mutex_unlock(&snd_card_mutex); |
| 250 | return locked; |
| 251 | } |
| 252 | |
Clemens Ladisch | b3b0abe | 2006-03-03 14:08:43 +0100 | [diff] [blame] | 253 | static loff_t snd_disconnect_llseek(struct file *file, loff_t offset, int orig) |
| 254 | { |
| 255 | return -ENODEV; |
| 256 | } |
| 257 | |
| 258 | static ssize_t snd_disconnect_read(struct file *file, char __user *buf, |
| 259 | size_t count, loff_t *offset) |
| 260 | { |
| 261 | return -ENODEV; |
| 262 | } |
| 263 | |
| 264 | static ssize_t snd_disconnect_write(struct file *file, const char __user *buf, |
| 265 | size_t count, loff_t *offset) |
| 266 | { |
| 267 | return -ENODEV; |
| 268 | } |
| 269 | |
Karsten Wiese | a9edfc6 | 2006-10-06 16:08:27 +0200 | [diff] [blame] | 270 | static int snd_disconnect_release(struct inode *inode, struct file *file) |
| 271 | { |
| 272 | struct snd_monitor_file *df = NULL, *_df; |
| 273 | |
| 274 | spin_lock(&shutdown_lock); |
| 275 | list_for_each_entry(_df, &shutdown_files, shutdown_list) { |
| 276 | if (_df->file == file) { |
| 277 | df = _df; |
Takashi Iwai | 118dd6b | 2009-02-23 16:35:21 +0100 | [diff] [blame] | 278 | list_del_init(&df->shutdown_list); |
Karsten Wiese | a9edfc6 | 2006-10-06 16:08:27 +0200 | [diff] [blame] | 279 | break; |
| 280 | } |
| 281 | } |
| 282 | spin_unlock(&shutdown_lock); |
| 283 | |
Al Viro | 233e70f | 2008-10-31 23:28:30 +0000 | [diff] [blame] | 284 | if (likely(df)) { |
| 285 | if ((file->f_flags & FASYNC) && df->disconnected_f_op->fasync) |
| 286 | df->disconnected_f_op->fasync(-1, file, 0); |
Karsten Wiese | a9edfc6 | 2006-10-06 16:08:27 +0200 | [diff] [blame] | 287 | return df->disconnected_f_op->release(inode, file); |
Al Viro | 233e70f | 2008-10-31 23:28:30 +0000 | [diff] [blame] | 288 | } |
Karsten Wiese | a9edfc6 | 2006-10-06 16:08:27 +0200 | [diff] [blame] | 289 | |
Harvey Harrison | 9bf8e7d | 2008-03-03 15:32:18 -0800 | [diff] [blame] | 290 | panic("%s(%p, %p) failed!", __func__, inode, file); |
Karsten Wiese | a9edfc6 | 2006-10-06 16:08:27 +0200 | [diff] [blame] | 291 | } |
| 292 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 293 | static unsigned int snd_disconnect_poll(struct file * file, poll_table * wait) |
| 294 | { |
| 295 | return POLLERR | POLLNVAL; |
| 296 | } |
| 297 | |
Clemens Ladisch | b3b0abe | 2006-03-03 14:08:43 +0100 | [diff] [blame] | 298 | static long snd_disconnect_ioctl(struct file *file, |
| 299 | unsigned int cmd, unsigned long arg) |
| 300 | { |
| 301 | return -ENODEV; |
| 302 | } |
| 303 | |
| 304 | static int snd_disconnect_mmap(struct file *file, struct vm_area_struct *vma) |
| 305 | { |
| 306 | return -ENODEV; |
| 307 | } |
| 308 | |
| 309 | static int snd_disconnect_fasync(int fd, struct file *file, int on) |
| 310 | { |
| 311 | return -ENODEV; |
| 312 | } |
| 313 | |
Arjan van de Ven | 9c2e08c | 2007-02-12 00:55:37 -0800 | [diff] [blame] | 314 | static const struct file_operations snd_shutdown_f_ops = |
Karsten Wiese | a9edfc6 | 2006-10-06 16:08:27 +0200 | [diff] [blame] | 315 | { |
| 316 | .owner = THIS_MODULE, |
| 317 | .llseek = snd_disconnect_llseek, |
| 318 | .read = snd_disconnect_read, |
| 319 | .write = snd_disconnect_write, |
| 320 | .release = snd_disconnect_release, |
| 321 | .poll = snd_disconnect_poll, |
| 322 | .unlocked_ioctl = snd_disconnect_ioctl, |
| 323 | #ifdef CONFIG_COMPAT |
| 324 | .compat_ioctl = snd_disconnect_ioctl, |
| 325 | #endif |
| 326 | .mmap = snd_disconnect_mmap, |
| 327 | .fasync = snd_disconnect_fasync |
| 328 | }; |
| 329 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 330 | /** |
| 331 | * snd_card_disconnect - disconnect all APIs from the file-operations (user space) |
| 332 | * @card: soundcard structure |
| 333 | * |
| 334 | * Disconnects all APIs from the file-operations (user space). |
| 335 | * |
| 336 | * Returns zero, otherwise a negative error code. |
| 337 | * |
| 338 | * Note: The current implementation replaces all active file->f_op with special |
| 339 | * dummy file operations (they do nothing except release). |
| 340 | */ |
Takashi Iwai | 512bbd6 | 2005-11-17 13:51:18 +0100 | [diff] [blame] | 341 | int snd_card_disconnect(struct snd_card *card) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 342 | { |
| 343 | struct snd_monitor_file *mfile; |
| 344 | struct file *file; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 345 | int err; |
| 346 | |
Takashi Iwai | f18638d | 2008-04-17 12:52:02 +0200 | [diff] [blame] | 347 | if (!card) |
| 348 | return -EINVAL; |
| 349 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 350 | spin_lock(&card->files_lock); |
| 351 | if (card->shutdown) { |
| 352 | spin_unlock(&card->files_lock); |
| 353 | return 0; |
| 354 | } |
| 355 | card->shutdown = 1; |
| 356 | spin_unlock(&card->files_lock); |
| 357 | |
| 358 | /* phase 1: disable fops (user space) operations for ALSA API */ |
Takashi Iwai | 746df94 | 2006-05-15 19:49:05 +0200 | [diff] [blame] | 359 | mutex_lock(&snd_card_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 360 | snd_cards[card->number] = NULL; |
Takashi Iwai | f18638d | 2008-04-17 12:52:02 +0200 | [diff] [blame] | 361 | snd_cards_lock &= ~(1 << card->number); |
Takashi Iwai | 746df94 | 2006-05-15 19:49:05 +0200 | [diff] [blame] | 362 | mutex_unlock(&snd_card_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 363 | |
| 364 | /* phase 2: replace file->f_op with special dummy operations */ |
| 365 | |
| 366 | spin_lock(&card->files_lock); |
Takashi Iwai | 118dd6b | 2009-02-23 16:35:21 +0100 | [diff] [blame] | 367 | list_for_each_entry(mfile, &card->files_list, list) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 368 | file = mfile->file; |
| 369 | |
| 370 | /* it's critical part, use endless loop */ |
| 371 | /* we have no room to fail */ |
Karsten Wiese | a9edfc6 | 2006-10-06 16:08:27 +0200 | [diff] [blame] | 372 | mfile->disconnected_f_op = mfile->file->f_op; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 373 | |
Karsten Wiese | a9edfc6 | 2006-10-06 16:08:27 +0200 | [diff] [blame] | 374 | spin_lock(&shutdown_lock); |
| 375 | list_add(&mfile->shutdown_list, &shutdown_files); |
| 376 | spin_unlock(&shutdown_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 377 | |
Karsten Wiese | a9edfc6 | 2006-10-06 16:08:27 +0200 | [diff] [blame] | 378 | mfile->file->f_op = &snd_shutdown_f_ops; |
Miguel Boton | bc9abce | 2008-01-13 12:03:53 +0100 | [diff] [blame] | 379 | fops_get(mfile->file->f_op); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 380 | } |
| 381 | spin_unlock(&card->files_lock); |
| 382 | |
| 383 | /* phase 3: notify all connected devices about disconnection */ |
| 384 | /* at this point, they cannot respond to any calls except release() */ |
| 385 | |
| 386 | #if defined(CONFIG_SND_MIXER_OSS) || defined(CONFIG_SND_MIXER_OSS_MODULE) |
| 387 | if (snd_mixer_oss_notify_callback) |
| 388 | snd_mixer_oss_notify_callback(card, SND_MIXER_OSS_NOTIFY_DISCONNECT); |
| 389 | #endif |
| 390 | |
| 391 | /* notify all devices that we are disconnected */ |
| 392 | err = snd_device_disconnect_all(card); |
| 393 | if (err < 0) |
| 394 | snd_printk(KERN_ERR "not all devices for card %i can be disconnected\n", card->number); |
| 395 | |
Takashi Iwai | 746d4a0 | 2006-06-23 14:37:59 +0200 | [diff] [blame] | 396 | snd_info_card_disconnect(card); |
Takashi Iwai | 73d38b1 | 2008-04-17 12:50:47 +0200 | [diff] [blame] | 397 | #ifndef CONFIG_SYSFS_DEPRECATED |
| 398 | if (card->card_dev) { |
| 399 | device_unregister(card->card_dev); |
| 400 | card->card_dev = NULL; |
| 401 | } |
| 402 | #endif |
Takashi Iwai | f18638d | 2008-04-17 12:52:02 +0200 | [diff] [blame] | 403 | #ifdef CONFIG_PM |
| 404 | wake_up(&card->power_sleep); |
| 405 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 406 | return 0; |
| 407 | } |
| 408 | |
Takashi Iwai | c0d3fb3 | 2006-04-28 15:13:39 +0200 | [diff] [blame] | 409 | EXPORT_SYMBOL(snd_card_disconnect); |
| 410 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 411 | /** |
| 412 | * snd_card_free - frees given soundcard structure |
| 413 | * @card: soundcard structure |
| 414 | * |
| 415 | * This function releases the soundcard structure and the all assigned |
| 416 | * devices automatically. That is, you don't have to release the devices |
| 417 | * by yourself. |
| 418 | * |
| 419 | * Returns zero. Frees all associated devices and frees the control |
| 420 | * interface associated to given soundcard. |
| 421 | */ |
Takashi Iwai | c461482 | 2006-06-23 14:38:23 +0200 | [diff] [blame] | 422 | static int snd_card_do_free(struct snd_card *card) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 423 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 424 | #if defined(CONFIG_SND_MIXER_OSS) || defined(CONFIG_SND_MIXER_OSS_MODULE) |
| 425 | if (snd_mixer_oss_notify_callback) |
| 426 | snd_mixer_oss_notify_callback(card, SND_MIXER_OSS_NOTIFY_FREE); |
| 427 | #endif |
| 428 | if (snd_device_free_all(card, SNDRV_DEV_CMD_PRE) < 0) { |
| 429 | snd_printk(KERN_ERR "unable to free all devices (pre)\n"); |
| 430 | /* Fatal, but this situation should never occur */ |
| 431 | } |
| 432 | if (snd_device_free_all(card, SNDRV_DEV_CMD_NORMAL) < 0) { |
| 433 | snd_printk(KERN_ERR "unable to free all devices (normal)\n"); |
| 434 | /* Fatal, but this situation should never occur */ |
| 435 | } |
| 436 | if (snd_device_free_all(card, SNDRV_DEV_CMD_POST) < 0) { |
| 437 | snd_printk(KERN_ERR "unable to free all devices (post)\n"); |
| 438 | /* Fatal, but this situation should never occur */ |
| 439 | } |
| 440 | if (card->private_free) |
| 441 | card->private_free(card); |
Takashi Iwai | 746d4a0 | 2006-06-23 14:37:59 +0200 | [diff] [blame] | 442 | snd_info_free_entry(card->proc_id); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 443 | if (snd_info_card_free(card) < 0) { |
| 444 | snd_printk(KERN_WARNING "unable to free card info\n"); |
| 445 | /* Not fatal error */ |
| 446 | } |
Takashi Iwai | c461482 | 2006-06-23 14:38:23 +0200 | [diff] [blame] | 447 | kfree(card); |
| 448 | return 0; |
| 449 | } |
| 450 | |
Takashi Iwai | c461482 | 2006-06-23 14:38:23 +0200 | [diff] [blame] | 451 | int snd_card_free_when_closed(struct snd_card *card) |
| 452 | { |
| 453 | int free_now = 0; |
Takashi Iwai | f18638d | 2008-04-17 12:52:02 +0200 | [diff] [blame] | 454 | int ret = snd_card_disconnect(card); |
Takashi Iwai | c461482 | 2006-06-23 14:38:23 +0200 | [diff] [blame] | 455 | if (ret) |
| 456 | return ret; |
| 457 | |
| 458 | spin_lock(&card->files_lock); |
Takashi Iwai | 118dd6b | 2009-02-23 16:35:21 +0100 | [diff] [blame] | 459 | if (list_empty(&card->files_list)) |
Takashi Iwai | c461482 | 2006-06-23 14:38:23 +0200 | [diff] [blame] | 460 | free_now = 1; |
| 461 | else |
| 462 | card->free_on_last_close = 1; |
| 463 | spin_unlock(&card->files_lock); |
| 464 | |
| 465 | if (free_now) |
| 466 | snd_card_do_free(card); |
| 467 | return 0; |
| 468 | } |
| 469 | |
| 470 | EXPORT_SYMBOL(snd_card_free_when_closed); |
| 471 | |
| 472 | int snd_card_free(struct snd_card *card) |
| 473 | { |
Takashi Iwai | f18638d | 2008-04-17 12:52:02 +0200 | [diff] [blame] | 474 | int ret = snd_card_disconnect(card); |
Takashi Iwai | c461482 | 2006-06-23 14:38:23 +0200 | [diff] [blame] | 475 | if (ret) |
| 476 | return ret; |
| 477 | |
| 478 | /* wait, until all devices are ready for the free operation */ |
Takashi Iwai | 118dd6b | 2009-02-23 16:35:21 +0100 | [diff] [blame] | 479 | wait_event(card->shutdown_sleep, list_empty(&card->files_list)); |
Takashi Iwai | c461482 | 2006-06-23 14:38:23 +0200 | [diff] [blame] | 480 | snd_card_do_free(card); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 481 | return 0; |
| 482 | } |
| 483 | |
Takashi Iwai | c0d3fb3 | 2006-04-28 15:13:39 +0200 | [diff] [blame] | 484 | EXPORT_SYMBOL(snd_card_free); |
| 485 | |
Takashi Iwai | 512bbd6 | 2005-11-17 13:51:18 +0100 | [diff] [blame] | 486 | static void choose_default_id(struct snd_card *card) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 487 | { |
Clemens Ladisch | d001544 | 2005-11-20 14:09:05 +0100 | [diff] [blame] | 488 | int i, len, idx_flag = 0, loops = SNDRV_CARDS; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 489 | char *id, *spos; |
| 490 | |
| 491 | id = spos = card->shortname; |
| 492 | while (*id != '\0') { |
| 493 | if (*id == ' ') |
| 494 | spos = id + 1; |
| 495 | id++; |
| 496 | } |
| 497 | id = card->id; |
| 498 | while (*spos != '\0' && !isalnum(*spos)) |
| 499 | spos++; |
| 500 | if (isdigit(*spos)) |
| 501 | *id++ = isalpha(card->shortname[0]) ? card->shortname[0] : 'D'; |
| 502 | while (*spos != '\0' && (size_t)(id - card->id) < sizeof(card->id) - 1) { |
| 503 | if (isalnum(*spos)) |
| 504 | *id++ = *spos; |
| 505 | spos++; |
| 506 | } |
| 507 | *id = '\0'; |
| 508 | |
| 509 | id = card->id; |
| 510 | |
| 511 | if (*id == '\0') |
| 512 | strcpy(id, "default"); |
| 513 | |
| 514 | while (1) { |
| 515 | if (loops-- == 0) { |
| 516 | snd_printk(KERN_ERR "unable to choose default card id (%s)\n", id); |
| 517 | strcpy(card->id, card->proc_root->name); |
| 518 | return; |
| 519 | } |
| 520 | if (!snd_info_check_reserved_words(id)) |
| 521 | goto __change; |
| 522 | for (i = 0; i < snd_ecards_limit; i++) { |
| 523 | if (snd_cards[i] && !strcmp(snd_cards[i]->id, id)) |
| 524 | goto __change; |
| 525 | } |
| 526 | break; |
| 527 | |
| 528 | __change: |
| 529 | len = strlen(id); |
Clemens Ladisch | d001544 | 2005-11-20 14:09:05 +0100 | [diff] [blame] | 530 | if (idx_flag) { |
| 531 | if (id[len-1] != '9') |
| 532 | id[len-1]++; |
| 533 | else |
| 534 | id[len-1] = 'A'; |
| 535 | } else if ((size_t)len <= sizeof(card->id) - 3) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 536 | strcat(id, "_1"); |
| 537 | idx_flag++; |
| 538 | } else { |
| 539 | spos = id + len - 2; |
| 540 | if ((size_t)len <= sizeof(card->id) - 2) |
| 541 | spos++; |
| 542 | *spos++ = '_'; |
| 543 | *spos++ = '1'; |
| 544 | *spos++ = '\0'; |
| 545 | idx_flag++; |
| 546 | } |
| 547 | } |
| 548 | } |
| 549 | |
Jaroslav Kysela | 9fb6198 | 2008-11-11 16:51:02 +0100 | [diff] [blame] | 550 | #ifndef CONFIG_SYSFS_DEPRECATED |
| 551 | static ssize_t |
| 552 | card_id_show_attr(struct device *dev, |
| 553 | struct device_attribute *attr, char *buf) |
| 554 | { |
| 555 | struct snd_card *card = dev_get_drvdata(dev); |
| 556 | return snprintf(buf, PAGE_SIZE, "%s\n", card ? card->id : "(null)"); |
| 557 | } |
| 558 | |
| 559 | static ssize_t |
| 560 | card_id_store_attr(struct device *dev, struct device_attribute *attr, |
| 561 | const char *buf, size_t count) |
| 562 | { |
| 563 | struct snd_card *card = dev_get_drvdata(dev); |
| 564 | char buf1[sizeof(card->id)]; |
| 565 | size_t copy = count > sizeof(card->id) - 1 ? |
| 566 | sizeof(card->id) - 1 : count; |
| 567 | size_t idx; |
| 568 | int c; |
| 569 | |
| 570 | for (idx = 0; idx < copy; idx++) { |
| 571 | c = buf[idx]; |
| 572 | if (!isalnum(c) && c != '_' && c != '-') |
| 573 | return -EINVAL; |
| 574 | } |
| 575 | memcpy(buf1, buf, copy); |
| 576 | buf1[copy] = '\0'; |
| 577 | mutex_lock(&snd_card_mutex); |
| 578 | if (!snd_info_check_reserved_words(buf1)) { |
| 579 | __exist: |
| 580 | mutex_unlock(&snd_card_mutex); |
| 581 | return -EEXIST; |
| 582 | } |
| 583 | for (idx = 0; idx < snd_ecards_limit; idx++) { |
| 584 | if (snd_cards[idx] && !strcmp(snd_cards[idx]->id, buf1)) |
| 585 | goto __exist; |
| 586 | } |
| 587 | strcpy(card->id, buf1); |
Jaroslav Kysela | c2eb9c4 | 2008-11-12 16:31:37 +0100 | [diff] [blame] | 588 | snd_info_card_id_change(card); |
Jaroslav Kysela | 9fb6198 | 2008-11-11 16:51:02 +0100 | [diff] [blame] | 589 | mutex_unlock(&snd_card_mutex); |
| 590 | |
| 591 | return count; |
| 592 | } |
| 593 | |
| 594 | static struct device_attribute card_id_attrs = |
| 595 | __ATTR(id, S_IRUGO | S_IWUSR, card_id_show_attr, card_id_store_attr); |
| 596 | |
| 597 | static ssize_t |
| 598 | card_number_show_attr(struct device *dev, |
| 599 | struct device_attribute *attr, char *buf) |
| 600 | { |
| 601 | struct snd_card *card = dev_get_drvdata(dev); |
| 602 | return snprintf(buf, PAGE_SIZE, "%i\n", card ? card->number : -1); |
| 603 | } |
| 604 | |
| 605 | static struct device_attribute card_number_attrs = |
| 606 | __ATTR(number, S_IRUGO, card_number_show_attr, NULL); |
| 607 | #endif /* CONFIG_SYSFS_DEPRECATED */ |
| 608 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 609 | /** |
| 610 | * snd_card_register - register the soundcard |
| 611 | * @card: soundcard structure |
| 612 | * |
| 613 | * This function registers all the devices assigned to the soundcard. |
| 614 | * Until calling this, the ALSA control interface is blocked from the |
| 615 | * external accesses. Thus, you should call this function at the end |
| 616 | * of the initialization of the card. |
| 617 | * |
| 618 | * Returns zero otherwise a negative error code if the registrain failed. |
| 619 | */ |
Takashi Iwai | 512bbd6 | 2005-11-17 13:51:18 +0100 | [diff] [blame] | 620 | int snd_card_register(struct snd_card *card) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 621 | { |
| 622 | int err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 623 | |
Takashi Iwai | 7eaa943 | 2008-08-08 17:09:09 +0200 | [diff] [blame] | 624 | if (snd_BUG_ON(!card)) |
| 625 | return -EINVAL; |
Takashi Iwai | 7d2aae1 | 2007-01-26 12:40:31 +0100 | [diff] [blame] | 626 | #ifndef CONFIG_SYSFS_DEPRECATED |
| 627 | if (!card->card_dev) { |
Greg Kroah-Hartman | abe9ab8 | 2008-07-21 20:03:34 -0700 | [diff] [blame] | 628 | card->card_dev = device_create(sound_class, card->dev, |
Jaroslav Kysela | 9fb6198 | 2008-11-11 16:51:02 +0100 | [diff] [blame] | 629 | MKDEV(0, 0), card, |
Greg Kroah-Hartman | abe9ab8 | 2008-07-21 20:03:34 -0700 | [diff] [blame] | 630 | "card%i", card->number); |
Takashi Iwai | 7d2aae1 | 2007-01-26 12:40:31 +0100 | [diff] [blame] | 631 | if (IS_ERR(card->card_dev)) |
| 632 | card->card_dev = NULL; |
Greg Kroah-Hartman | d80f19f | 2006-08-07 22:19:37 -0700 | [diff] [blame] | 633 | } |
Takashi Iwai | 7d2aae1 | 2007-01-26 12:40:31 +0100 | [diff] [blame] | 634 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 635 | if ((err = snd_device_register_all(card)) < 0) |
| 636 | return err; |
Takashi Iwai | 746df94 | 2006-05-15 19:49:05 +0200 | [diff] [blame] | 637 | mutex_lock(&snd_card_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 638 | if (snd_cards[card->number]) { |
| 639 | /* already registered */ |
Takashi Iwai | 746df94 | 2006-05-15 19:49:05 +0200 | [diff] [blame] | 640 | mutex_unlock(&snd_card_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 641 | return 0; |
| 642 | } |
| 643 | if (card->id[0] == '\0') |
| 644 | choose_default_id(card); |
| 645 | snd_cards[card->number] = card; |
Takashi Iwai | 746df94 | 2006-05-15 19:49:05 +0200 | [diff] [blame] | 646 | mutex_unlock(&snd_card_mutex); |
Takashi Iwai | e28563c | 2005-12-01 10:42:42 +0100 | [diff] [blame] | 647 | init_info_for_card(card); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 648 | #if defined(CONFIG_SND_MIXER_OSS) || defined(CONFIG_SND_MIXER_OSS_MODULE) |
| 649 | if (snd_mixer_oss_notify_callback) |
| 650 | snd_mixer_oss_notify_callback(card, SND_MIXER_OSS_NOTIFY_REGISTER); |
| 651 | #endif |
Jaroslav Kysela | 9fb6198 | 2008-11-11 16:51:02 +0100 | [diff] [blame] | 652 | #ifndef CONFIG_SYSFS_DEPRECATED |
| 653 | if (card->card_dev) { |
Hannes Eder | 2af7529 | 2008-11-18 12:25:06 -0500 | [diff] [blame] | 654 | err = device_create_file(card->card_dev, &card_id_attrs); |
| 655 | if (err < 0) |
| 656 | return err; |
| 657 | err = device_create_file(card->card_dev, &card_number_attrs); |
| 658 | if (err < 0) |
| 659 | return err; |
Jaroslav Kysela | 9fb6198 | 2008-11-11 16:51:02 +0100 | [diff] [blame] | 660 | } |
| 661 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 662 | return 0; |
| 663 | } |
| 664 | |
Takashi Iwai | c0d3fb3 | 2006-04-28 15:13:39 +0200 | [diff] [blame] | 665 | EXPORT_SYMBOL(snd_card_register); |
| 666 | |
Takashi Iwai | e28563c | 2005-12-01 10:42:42 +0100 | [diff] [blame] | 667 | #ifdef CONFIG_PROC_FS |
Takashi Iwai | 6581f4e | 2006-05-17 17:14:51 +0200 | [diff] [blame] | 668 | static struct snd_info_entry *snd_card_info_entry; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 669 | |
Takashi Iwai | a381a7a | 2005-11-17 15:55:49 +0100 | [diff] [blame] | 670 | static void snd_card_info_read(struct snd_info_entry *entry, |
| 671 | struct snd_info_buffer *buffer) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 672 | { |
| 673 | int idx, count; |
Takashi Iwai | 512bbd6 | 2005-11-17 13:51:18 +0100 | [diff] [blame] | 674 | struct snd_card *card; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 675 | |
| 676 | for (idx = count = 0; idx < SNDRV_CARDS; idx++) { |
Takashi Iwai | 746df94 | 2006-05-15 19:49:05 +0200 | [diff] [blame] | 677 | mutex_lock(&snd_card_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 678 | if ((card = snd_cards[idx]) != NULL) { |
| 679 | count++; |
Clemens Ladisch | d001544 | 2005-11-20 14:09:05 +0100 | [diff] [blame] | 680 | snd_iprintf(buffer, "%2i [%-15s]: %s - %s\n", |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 681 | idx, |
| 682 | card->id, |
| 683 | card->driver, |
| 684 | card->shortname); |
Clemens Ladisch | d001544 | 2005-11-20 14:09:05 +0100 | [diff] [blame] | 685 | snd_iprintf(buffer, " %s\n", |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 686 | card->longname); |
| 687 | } |
Takashi Iwai | 746df94 | 2006-05-15 19:49:05 +0200 | [diff] [blame] | 688 | mutex_unlock(&snd_card_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 689 | } |
| 690 | if (!count) |
| 691 | snd_iprintf(buffer, "--- no soundcards ---\n"); |
| 692 | } |
| 693 | |
Takashi Iwai | e28563c | 2005-12-01 10:42:42 +0100 | [diff] [blame] | 694 | #ifdef CONFIG_SND_OSSEMUL |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 695 | |
Takashi Iwai | 512bbd6 | 2005-11-17 13:51:18 +0100 | [diff] [blame] | 696 | void snd_card_info_read_oss(struct snd_info_buffer *buffer) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 697 | { |
| 698 | int idx, count; |
Takashi Iwai | 512bbd6 | 2005-11-17 13:51:18 +0100 | [diff] [blame] | 699 | struct snd_card *card; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 700 | |
| 701 | for (idx = count = 0; idx < SNDRV_CARDS; idx++) { |
Takashi Iwai | 746df94 | 2006-05-15 19:49:05 +0200 | [diff] [blame] | 702 | mutex_lock(&snd_card_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 703 | if ((card = snd_cards[idx]) != NULL) { |
| 704 | count++; |
| 705 | snd_iprintf(buffer, "%s\n", card->longname); |
| 706 | } |
Takashi Iwai | 746df94 | 2006-05-15 19:49:05 +0200 | [diff] [blame] | 707 | mutex_unlock(&snd_card_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 708 | } |
| 709 | if (!count) { |
| 710 | snd_iprintf(buffer, "--- no soundcards ---\n"); |
| 711 | } |
| 712 | } |
| 713 | |
| 714 | #endif |
| 715 | |
| 716 | #ifdef MODULE |
Takashi Iwai | 512bbd6 | 2005-11-17 13:51:18 +0100 | [diff] [blame] | 717 | static struct snd_info_entry *snd_card_module_info_entry; |
| 718 | static void snd_card_module_info_read(struct snd_info_entry *entry, |
| 719 | struct snd_info_buffer *buffer) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 720 | { |
| 721 | int idx; |
Takashi Iwai | 512bbd6 | 2005-11-17 13:51:18 +0100 | [diff] [blame] | 722 | struct snd_card *card; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 723 | |
| 724 | for (idx = 0; idx < SNDRV_CARDS; idx++) { |
Takashi Iwai | 746df94 | 2006-05-15 19:49:05 +0200 | [diff] [blame] | 725 | mutex_lock(&snd_card_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 726 | if ((card = snd_cards[idx]) != NULL) |
Clemens Ladisch | d001544 | 2005-11-20 14:09:05 +0100 | [diff] [blame] | 727 | snd_iprintf(buffer, "%2i %s\n", |
| 728 | idx, card->module->name); |
Takashi Iwai | 746df94 | 2006-05-15 19:49:05 +0200 | [diff] [blame] | 729 | mutex_unlock(&snd_card_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 730 | } |
| 731 | } |
| 732 | #endif |
| 733 | |
| 734 | int __init snd_card_info_init(void) |
| 735 | { |
Takashi Iwai | 512bbd6 | 2005-11-17 13:51:18 +0100 | [diff] [blame] | 736 | struct snd_info_entry *entry; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 737 | |
| 738 | entry = snd_info_create_module_entry(THIS_MODULE, "cards", NULL); |
Takashi Iwai | 7c22f1a | 2005-10-10 11:46:31 +0200 | [diff] [blame] | 739 | if (! entry) |
| 740 | return -ENOMEM; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 741 | entry->c.text.read = snd_card_info_read; |
| 742 | if (snd_info_register(entry) < 0) { |
| 743 | snd_info_free_entry(entry); |
| 744 | return -ENOMEM; |
| 745 | } |
| 746 | snd_card_info_entry = entry; |
| 747 | |
| 748 | #ifdef MODULE |
| 749 | entry = snd_info_create_module_entry(THIS_MODULE, "modules", NULL); |
| 750 | if (entry) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 751 | entry->c.text.read = snd_card_module_info_read; |
| 752 | if (snd_info_register(entry) < 0) |
| 753 | snd_info_free_entry(entry); |
| 754 | else |
| 755 | snd_card_module_info_entry = entry; |
| 756 | } |
| 757 | #endif |
| 758 | |
| 759 | return 0; |
| 760 | } |
| 761 | |
| 762 | int __exit snd_card_info_done(void) |
| 763 | { |
Takashi Iwai | 746d4a0 | 2006-06-23 14:37:59 +0200 | [diff] [blame] | 764 | snd_info_free_entry(snd_card_info_entry); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 765 | #ifdef MODULE |
Takashi Iwai | 746d4a0 | 2006-06-23 14:37:59 +0200 | [diff] [blame] | 766 | snd_info_free_entry(snd_card_module_info_entry); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 767 | #endif |
| 768 | return 0; |
| 769 | } |
| 770 | |
Takashi Iwai | e28563c | 2005-12-01 10:42:42 +0100 | [diff] [blame] | 771 | #endif /* CONFIG_PROC_FS */ |
| 772 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 773 | /** |
| 774 | * snd_component_add - add a component string |
| 775 | * @card: soundcard structure |
| 776 | * @component: the component id string |
| 777 | * |
| 778 | * This function adds the component id string to the supported list. |
| 779 | * The component can be referred from the alsa-lib. |
| 780 | * |
| 781 | * Returns zero otherwise a negative error code. |
| 782 | */ |
| 783 | |
Takashi Iwai | 512bbd6 | 2005-11-17 13:51:18 +0100 | [diff] [blame] | 784 | int snd_component_add(struct snd_card *card, const char *component) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 785 | { |
| 786 | char *ptr; |
| 787 | int len = strlen(component); |
| 788 | |
| 789 | ptr = strstr(card->components, component); |
| 790 | if (ptr != NULL) { |
| 791 | if (ptr[len] == '\0' || ptr[len] == ' ') /* already there */ |
| 792 | return 1; |
| 793 | } |
| 794 | if (strlen(card->components) + 1 + len + 1 > sizeof(card->components)) { |
| 795 | snd_BUG(); |
| 796 | return -ENOMEM; |
| 797 | } |
| 798 | if (card->components[0] != '\0') |
| 799 | strcat(card->components, " "); |
| 800 | strcat(card->components, component); |
| 801 | return 0; |
| 802 | } |
| 803 | |
Takashi Iwai | c0d3fb3 | 2006-04-28 15:13:39 +0200 | [diff] [blame] | 804 | EXPORT_SYMBOL(snd_component_add); |
| 805 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 806 | /** |
| 807 | * snd_card_file_add - add the file to the file list of the card |
| 808 | * @card: soundcard structure |
| 809 | * @file: file pointer |
| 810 | * |
| 811 | * This function adds the file to the file linked-list of the card. |
| 812 | * This linked-list is used to keep tracking the connection state, |
| 813 | * and to avoid the release of busy resources by hotplug. |
| 814 | * |
| 815 | * Returns zero or a negative error code. |
| 816 | */ |
Takashi Iwai | 512bbd6 | 2005-11-17 13:51:18 +0100 | [diff] [blame] | 817 | int snd_card_file_add(struct snd_card *card, struct file *file) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 818 | { |
| 819 | struct snd_monitor_file *mfile; |
| 820 | |
| 821 | mfile = kmalloc(sizeof(*mfile), GFP_KERNEL); |
| 822 | if (mfile == NULL) |
| 823 | return -ENOMEM; |
| 824 | mfile->file = file; |
Karsten Wiese | a9edfc6 | 2006-10-06 16:08:27 +0200 | [diff] [blame] | 825 | mfile->disconnected_f_op = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 826 | spin_lock(&card->files_lock); |
| 827 | if (card->shutdown) { |
| 828 | spin_unlock(&card->files_lock); |
| 829 | kfree(mfile); |
| 830 | return -ENODEV; |
| 831 | } |
Takashi Iwai | 118dd6b | 2009-02-23 16:35:21 +0100 | [diff] [blame] | 832 | list_add(&mfile->list, &card->files_list); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 833 | spin_unlock(&card->files_lock); |
| 834 | return 0; |
| 835 | } |
| 836 | |
Takashi Iwai | c0d3fb3 | 2006-04-28 15:13:39 +0200 | [diff] [blame] | 837 | EXPORT_SYMBOL(snd_card_file_add); |
| 838 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 839 | /** |
| 840 | * snd_card_file_remove - remove the file from the file list |
| 841 | * @card: soundcard structure |
| 842 | * @file: file pointer |
| 843 | * |
| 844 | * This function removes the file formerly added to the card via |
| 845 | * snd_card_file_add() function. |
Takashi Iwai | 2b29b13 | 2006-06-23 14:38:26 +0200 | [diff] [blame] | 846 | * If all files are removed and snd_card_free_when_closed() was |
| 847 | * called beforehand, it processes the pending release of |
| 848 | * resources. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 849 | * |
| 850 | * Returns zero or a negative error code. |
| 851 | */ |
Takashi Iwai | 512bbd6 | 2005-11-17 13:51:18 +0100 | [diff] [blame] | 852 | int snd_card_file_remove(struct snd_card *card, struct file *file) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 853 | { |
Takashi Iwai | 118dd6b | 2009-02-23 16:35:21 +0100 | [diff] [blame] | 854 | struct snd_monitor_file *mfile, *found = NULL; |
Takashi Iwai | c461482 | 2006-06-23 14:38:23 +0200 | [diff] [blame] | 855 | int last_close = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 856 | |
| 857 | spin_lock(&card->files_lock); |
Takashi Iwai | 118dd6b | 2009-02-23 16:35:21 +0100 | [diff] [blame] | 858 | list_for_each_entry(mfile, &card->files_list, list) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 859 | if (mfile->file == file) { |
Takashi Iwai | 118dd6b | 2009-02-23 16:35:21 +0100 | [diff] [blame] | 860 | list_del(&mfile->list); |
| 861 | if (mfile->disconnected_f_op) |
| 862 | fops_put(mfile->disconnected_f_op); |
| 863 | found = mfile; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 864 | break; |
| 865 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 866 | } |
Takashi Iwai | 118dd6b | 2009-02-23 16:35:21 +0100 | [diff] [blame] | 867 | if (list_empty(&card->files_list)) |
Takashi Iwai | c461482 | 2006-06-23 14:38:23 +0200 | [diff] [blame] | 868 | last_close = 1; |
| 869 | spin_unlock(&card->files_lock); |
| 870 | if (last_close) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 871 | wake_up(&card->shutdown_sleep); |
Takashi Iwai | c461482 | 2006-06-23 14:38:23 +0200 | [diff] [blame] | 872 | if (card->free_on_last_close) |
| 873 | snd_card_do_free(card); |
| 874 | } |
Takashi Iwai | 118dd6b | 2009-02-23 16:35:21 +0100 | [diff] [blame] | 875 | if (!found) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 876 | snd_printk(KERN_ERR "ALSA card file remove problem (%p)\n", file); |
| 877 | return -ENOENT; |
| 878 | } |
Takashi Iwai | 118dd6b | 2009-02-23 16:35:21 +0100 | [diff] [blame] | 879 | kfree(found); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 880 | return 0; |
| 881 | } |
| 882 | |
Takashi Iwai | c0d3fb3 | 2006-04-28 15:13:39 +0200 | [diff] [blame] | 883 | EXPORT_SYMBOL(snd_card_file_remove); |
| 884 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 885 | #ifdef CONFIG_PM |
| 886 | /** |
| 887 | * snd_power_wait - wait until the power-state is changed. |
| 888 | * @card: soundcard structure |
| 889 | * @power_state: expected power state |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 890 | * |
| 891 | * Waits until the power-state is changed. |
| 892 | * |
| 893 | * Note: the power lock must be active before call. |
| 894 | */ |
Takashi Iwai | cbac4b0 | 2006-03-27 12:38:07 +0200 | [diff] [blame] | 895 | int snd_power_wait(struct snd_card *card, unsigned int power_state) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 896 | { |
| 897 | wait_queue_t wait; |
| 898 | int result = 0; |
| 899 | |
| 900 | /* fastpath */ |
| 901 | if (snd_power_get_state(card) == power_state) |
| 902 | return 0; |
| 903 | init_waitqueue_entry(&wait, current); |
| 904 | add_wait_queue(&card->power_sleep, &wait); |
| 905 | while (1) { |
| 906 | if (card->shutdown) { |
| 907 | result = -ENODEV; |
| 908 | break; |
| 909 | } |
| 910 | if (snd_power_get_state(card) == power_state) |
| 911 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 912 | set_current_state(TASK_UNINTERRUPTIBLE); |
| 913 | snd_power_unlock(card); |
| 914 | schedule_timeout(30 * HZ); |
| 915 | snd_power_lock(card); |
| 916 | } |
| 917 | remove_wait_queue(&card->power_sleep, &wait); |
| 918 | return result; |
| 919 | } |
| 920 | |
Takashi Iwai | c0d3fb3 | 2006-04-28 15:13:39 +0200 | [diff] [blame] | 921 | EXPORT_SYMBOL(snd_power_wait); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 922 | #endif /* CONFIG_PM */ |