Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * Information interface for ALSA driver |
| 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/vmalloc.h> |
| 25 | #include <linux/time.h> |
| 26 | #include <linux/smp_lock.h> |
Paulo Marques | 543537b | 2005-06-23 00:09:02 -0700 | [diff] [blame] | 27 | #include <linux/string.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/info.h> |
| 31 | #include <sound/version.h> |
| 32 | #include <linux/proc_fs.h> |
| 33 | #include <linux/devfs_fs_kernel.h> |
Ingo Molnar | 1a60d4c | 2006-01-16 16:29:08 +0100 | [diff] [blame] | 34 | #include <linux/mutex.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 35 | #include <stdarg.h> |
| 36 | |
| 37 | /* |
| 38 | * |
| 39 | */ |
| 40 | |
Takashi Iwai | e28563c | 2005-12-01 10:42:42 +0100 | [diff] [blame] | 41 | #ifdef CONFIG_PROC_FS |
| 42 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 43 | int snd_info_check_reserved_words(const char *str) |
| 44 | { |
| 45 | static char *reserved[] = |
| 46 | { |
| 47 | "version", |
| 48 | "meminfo", |
| 49 | "memdebug", |
| 50 | "detect", |
| 51 | "devices", |
| 52 | "oss", |
| 53 | "cards", |
| 54 | "timers", |
| 55 | "synth", |
| 56 | "pcm", |
| 57 | "seq", |
| 58 | NULL |
| 59 | }; |
| 60 | char **xstr = reserved; |
| 61 | |
| 62 | while (*xstr) { |
| 63 | if (!strcmp(*xstr, str)) |
| 64 | return 0; |
| 65 | xstr++; |
| 66 | } |
| 67 | if (!strncmp(str, "card", 4)) |
| 68 | return 0; |
| 69 | return 1; |
| 70 | } |
| 71 | |
Ingo Molnar | 1a60d4c | 2006-01-16 16:29:08 +0100 | [diff] [blame] | 72 | static DEFINE_MUTEX(info_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 73 | |
Takashi Iwai | 24c1f93 | 2005-11-17 13:58:48 +0100 | [diff] [blame] | 74 | struct snd_info_private_data { |
| 75 | struct snd_info_buffer *rbuffer; |
| 76 | struct snd_info_buffer *wbuffer; |
| 77 | struct snd_info_entry *entry; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 78 | void *file_private_data; |
Takashi Iwai | 24c1f93 | 2005-11-17 13:58:48 +0100 | [diff] [blame] | 79 | }; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 80 | |
| 81 | static int snd_info_version_init(void); |
| 82 | static int snd_info_version_done(void); |
| 83 | |
| 84 | |
| 85 | /** |
| 86 | * snd_iprintf - printf on the procfs buffer |
| 87 | * @buffer: the procfs buffer |
| 88 | * @fmt: the printf format |
| 89 | * |
| 90 | * Outputs the string on the procfs buffer just like printf(). |
| 91 | * |
| 92 | * Returns the size of output string. |
| 93 | */ |
Takashi Iwai | 24c1f93 | 2005-11-17 13:58:48 +0100 | [diff] [blame] | 94 | int snd_iprintf(struct snd_info_buffer *buffer, char *fmt,...) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 95 | { |
| 96 | va_list args; |
| 97 | int len, res; |
| 98 | |
| 99 | if (buffer->stop || buffer->error) |
| 100 | return 0; |
| 101 | len = buffer->len - buffer->size; |
| 102 | va_start(args, fmt); |
| 103 | res = vsnprintf(buffer->curr, len, fmt, args); |
| 104 | va_end(args); |
| 105 | if (res >= len) { |
| 106 | buffer->stop = 1; |
| 107 | return 0; |
| 108 | } |
| 109 | buffer->curr += res; |
| 110 | buffer->size += res; |
| 111 | return res; |
| 112 | } |
| 113 | |
| 114 | /* |
| 115 | |
| 116 | */ |
| 117 | |
| 118 | static struct proc_dir_entry *snd_proc_root = NULL; |
Takashi Iwai | 24c1f93 | 2005-11-17 13:58:48 +0100 | [diff] [blame] | 119 | struct snd_info_entry *snd_seq_root = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 120 | #ifdef CONFIG_SND_OSSEMUL |
Takashi Iwai | 24c1f93 | 2005-11-17 13:58:48 +0100 | [diff] [blame] | 121 | struct snd_info_entry *snd_oss_root = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 122 | #endif |
| 123 | |
| 124 | static inline void snd_info_entry_prepare(struct proc_dir_entry *de) |
| 125 | { |
| 126 | de->owner = THIS_MODULE; |
| 127 | } |
| 128 | |
| 129 | static void snd_remove_proc_entry(struct proc_dir_entry *parent, |
| 130 | struct proc_dir_entry *de) |
| 131 | { |
| 132 | if (de) |
| 133 | remove_proc_entry(de->name, parent); |
| 134 | } |
| 135 | |
| 136 | static loff_t snd_info_entry_llseek(struct file *file, loff_t offset, int orig) |
| 137 | { |
Takashi Iwai | 24c1f93 | 2005-11-17 13:58:48 +0100 | [diff] [blame] | 138 | struct snd_info_private_data *data; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 139 | struct snd_info_entry *entry; |
| 140 | loff_t ret; |
| 141 | |
| 142 | data = file->private_data; |
| 143 | entry = data->entry; |
| 144 | lock_kernel(); |
| 145 | switch (entry->content) { |
| 146 | case SNDRV_INFO_CONTENT_TEXT: |
| 147 | switch (orig) { |
| 148 | case 0: /* SEEK_SET */ |
| 149 | file->f_pos = offset; |
| 150 | ret = file->f_pos; |
| 151 | goto out; |
| 152 | case 1: /* SEEK_CUR */ |
| 153 | file->f_pos += offset; |
| 154 | ret = file->f_pos; |
| 155 | goto out; |
| 156 | case 2: /* SEEK_END */ |
| 157 | default: |
| 158 | ret = -EINVAL; |
| 159 | goto out; |
| 160 | } |
| 161 | break; |
| 162 | case SNDRV_INFO_CONTENT_DATA: |
| 163 | if (entry->c.ops->llseek) { |
| 164 | ret = entry->c.ops->llseek(entry, |
| 165 | data->file_private_data, |
| 166 | file, offset, orig); |
| 167 | goto out; |
| 168 | } |
| 169 | break; |
| 170 | } |
| 171 | ret = -ENXIO; |
| 172 | out: |
| 173 | unlock_kernel(); |
| 174 | return ret; |
| 175 | } |
| 176 | |
| 177 | static ssize_t snd_info_entry_read(struct file *file, char __user *buffer, |
| 178 | size_t count, loff_t * offset) |
| 179 | { |
Takashi Iwai | 24c1f93 | 2005-11-17 13:58:48 +0100 | [diff] [blame] | 180 | struct snd_info_private_data *data; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 181 | struct snd_info_entry *entry; |
Takashi Iwai | 24c1f93 | 2005-11-17 13:58:48 +0100 | [diff] [blame] | 182 | struct snd_info_buffer *buf; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 183 | size_t size = 0; |
| 184 | loff_t pos; |
| 185 | |
| 186 | data = file->private_data; |
| 187 | snd_assert(data != NULL, return -ENXIO); |
| 188 | pos = *offset; |
| 189 | if (pos < 0 || (long) pos != pos || (ssize_t) count < 0) |
| 190 | return -EIO; |
| 191 | if ((unsigned long) pos + (unsigned long) count < (unsigned long) pos) |
| 192 | return -EIO; |
| 193 | entry = data->entry; |
| 194 | switch (entry->content) { |
| 195 | case SNDRV_INFO_CONTENT_TEXT: |
| 196 | buf = data->rbuffer; |
| 197 | if (buf == NULL) |
| 198 | return -EIO; |
| 199 | if (pos >= buf->size) |
| 200 | return 0; |
| 201 | size = buf->size - pos; |
| 202 | size = min(count, size); |
| 203 | if (copy_to_user(buffer, buf->buffer + pos, size)) |
| 204 | return -EFAULT; |
| 205 | break; |
| 206 | case SNDRV_INFO_CONTENT_DATA: |
| 207 | if (entry->c.ops->read) |
| 208 | size = entry->c.ops->read(entry, |
| 209 | data->file_private_data, |
| 210 | file, buffer, count, pos); |
| 211 | break; |
| 212 | } |
| 213 | if ((ssize_t) size > 0) |
| 214 | *offset = pos + size; |
| 215 | return size; |
| 216 | } |
| 217 | |
| 218 | static ssize_t snd_info_entry_write(struct file *file, const char __user *buffer, |
| 219 | size_t count, loff_t * offset) |
| 220 | { |
Takashi Iwai | 24c1f93 | 2005-11-17 13:58:48 +0100 | [diff] [blame] | 221 | struct snd_info_private_data *data; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 222 | struct snd_info_entry *entry; |
Takashi Iwai | 24c1f93 | 2005-11-17 13:58:48 +0100 | [diff] [blame] | 223 | struct snd_info_buffer *buf; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 224 | size_t size = 0; |
| 225 | loff_t pos; |
| 226 | |
| 227 | data = file->private_data; |
| 228 | snd_assert(data != NULL, return -ENXIO); |
| 229 | entry = data->entry; |
| 230 | pos = *offset; |
| 231 | if (pos < 0 || (long) pos != pos || (ssize_t) count < 0) |
| 232 | return -EIO; |
| 233 | if ((unsigned long) pos + (unsigned long) count < (unsigned long) pos) |
| 234 | return -EIO; |
| 235 | switch (entry->content) { |
| 236 | case SNDRV_INFO_CONTENT_TEXT: |
| 237 | buf = data->wbuffer; |
| 238 | if (buf == NULL) |
| 239 | return -EIO; |
| 240 | if (pos >= buf->len) |
| 241 | return -ENOMEM; |
| 242 | size = buf->len - pos; |
| 243 | size = min(count, size); |
| 244 | if (copy_from_user(buf->buffer + pos, buffer, size)) |
| 245 | return -EFAULT; |
| 246 | if ((long)buf->size < pos + size) |
| 247 | buf->size = pos + size; |
| 248 | break; |
| 249 | case SNDRV_INFO_CONTENT_DATA: |
| 250 | if (entry->c.ops->write) |
| 251 | size = entry->c.ops->write(entry, |
| 252 | data->file_private_data, |
| 253 | file, buffer, count, pos); |
| 254 | break; |
| 255 | } |
| 256 | if ((ssize_t) size > 0) |
| 257 | *offset = pos + size; |
| 258 | return size; |
| 259 | } |
| 260 | |
| 261 | static int snd_info_entry_open(struct inode *inode, struct file *file) |
| 262 | { |
Takashi Iwai | 24c1f93 | 2005-11-17 13:58:48 +0100 | [diff] [blame] | 263 | struct snd_info_entry *entry; |
| 264 | struct snd_info_private_data *data; |
| 265 | struct snd_info_buffer *buffer; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 266 | struct proc_dir_entry *p; |
| 267 | int mode, err; |
| 268 | |
Ingo Molnar | 1a60d4c | 2006-01-16 16:29:08 +0100 | [diff] [blame] | 269 | mutex_lock(&info_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 270 | p = PDE(inode); |
Takashi Iwai | 24c1f93 | 2005-11-17 13:58:48 +0100 | [diff] [blame] | 271 | entry = p == NULL ? NULL : (struct snd_info_entry *)p->data; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 272 | if (entry == NULL || entry->disconnected) { |
Ingo Molnar | 1a60d4c | 2006-01-16 16:29:08 +0100 | [diff] [blame] | 273 | mutex_unlock(&info_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 274 | return -ENODEV; |
| 275 | } |
| 276 | if (!try_module_get(entry->module)) { |
| 277 | err = -EFAULT; |
| 278 | goto __error1; |
| 279 | } |
| 280 | mode = file->f_flags & O_ACCMODE; |
| 281 | if (mode == O_RDONLY || mode == O_RDWR) { |
| 282 | if ((entry->content == SNDRV_INFO_CONTENT_TEXT && |
| 283 | !entry->c.text.read_size) || |
| 284 | (entry->content == SNDRV_INFO_CONTENT_DATA && |
| 285 | entry->c.ops->read == NULL)) { |
| 286 | err = -ENODEV; |
| 287 | goto __error; |
| 288 | } |
| 289 | } |
| 290 | if (mode == O_WRONLY || mode == O_RDWR) { |
| 291 | if ((entry->content == SNDRV_INFO_CONTENT_TEXT && |
| 292 | !entry->c.text.write_size) || |
| 293 | (entry->content == SNDRV_INFO_CONTENT_DATA && |
| 294 | entry->c.ops->write == NULL)) { |
| 295 | err = -ENODEV; |
| 296 | goto __error; |
| 297 | } |
| 298 | } |
Takashi Iwai | ca2c096 | 2005-09-09 14:20:23 +0200 | [diff] [blame] | 299 | data = kzalloc(sizeof(*data), GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 300 | if (data == NULL) { |
| 301 | err = -ENOMEM; |
| 302 | goto __error; |
| 303 | } |
| 304 | data->entry = entry; |
| 305 | switch (entry->content) { |
| 306 | case SNDRV_INFO_CONTENT_TEXT: |
| 307 | if (mode == O_RDONLY || mode == O_RDWR) { |
Takashi Iwai | ca2c096 | 2005-09-09 14:20:23 +0200 | [diff] [blame] | 308 | buffer = kzalloc(sizeof(*buffer), GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 309 | if (buffer == NULL) { |
| 310 | kfree(data); |
| 311 | err = -ENOMEM; |
| 312 | goto __error; |
| 313 | } |
| 314 | buffer->len = (entry->c.text.read_size + |
| 315 | (PAGE_SIZE - 1)) & ~(PAGE_SIZE - 1); |
| 316 | buffer->buffer = vmalloc(buffer->len); |
| 317 | if (buffer->buffer == NULL) { |
| 318 | kfree(buffer); |
| 319 | kfree(data); |
| 320 | err = -ENOMEM; |
| 321 | goto __error; |
| 322 | } |
| 323 | buffer->curr = buffer->buffer; |
| 324 | data->rbuffer = buffer; |
| 325 | } |
| 326 | if (mode == O_WRONLY || mode == O_RDWR) { |
Takashi Iwai | ca2c096 | 2005-09-09 14:20:23 +0200 | [diff] [blame] | 327 | buffer = kzalloc(sizeof(*buffer), GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 328 | if (buffer == NULL) { |
| 329 | if (mode == O_RDWR) { |
| 330 | vfree(data->rbuffer->buffer); |
| 331 | kfree(data->rbuffer); |
| 332 | } |
| 333 | kfree(data); |
| 334 | err = -ENOMEM; |
| 335 | goto __error; |
| 336 | } |
| 337 | buffer->len = (entry->c.text.write_size + |
| 338 | (PAGE_SIZE - 1)) & ~(PAGE_SIZE - 1); |
| 339 | buffer->buffer = vmalloc(buffer->len); |
| 340 | if (buffer->buffer == NULL) { |
| 341 | if (mode == O_RDWR) { |
| 342 | vfree(data->rbuffer->buffer); |
| 343 | kfree(data->rbuffer); |
| 344 | } |
| 345 | kfree(buffer); |
| 346 | kfree(data); |
| 347 | err = -ENOMEM; |
| 348 | goto __error; |
| 349 | } |
| 350 | buffer->curr = buffer->buffer; |
| 351 | data->wbuffer = buffer; |
| 352 | } |
| 353 | break; |
| 354 | case SNDRV_INFO_CONTENT_DATA: /* data */ |
| 355 | if (entry->c.ops->open) { |
| 356 | if ((err = entry->c.ops->open(entry, mode, |
| 357 | &data->file_private_data)) < 0) { |
| 358 | kfree(data); |
| 359 | goto __error; |
| 360 | } |
| 361 | } |
| 362 | break; |
| 363 | } |
| 364 | file->private_data = data; |
Ingo Molnar | 1a60d4c | 2006-01-16 16:29:08 +0100 | [diff] [blame] | 365 | mutex_unlock(&info_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 366 | if (entry->content == SNDRV_INFO_CONTENT_TEXT && |
| 367 | (mode == O_RDONLY || mode == O_RDWR)) { |
| 368 | if (entry->c.text.read) { |
Ingo Molnar | 1a60d4c | 2006-01-16 16:29:08 +0100 | [diff] [blame] | 369 | mutex_lock(&entry->access); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 370 | entry->c.text.read(entry, data->rbuffer); |
Ingo Molnar | 1a60d4c | 2006-01-16 16:29:08 +0100 | [diff] [blame] | 371 | mutex_unlock(&entry->access); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 372 | } |
| 373 | } |
| 374 | return 0; |
| 375 | |
| 376 | __error: |
| 377 | module_put(entry->module); |
| 378 | __error1: |
Ingo Molnar | 1a60d4c | 2006-01-16 16:29:08 +0100 | [diff] [blame] | 379 | mutex_unlock(&info_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 380 | return err; |
| 381 | } |
| 382 | |
| 383 | static int snd_info_entry_release(struct inode *inode, struct file *file) |
| 384 | { |
Takashi Iwai | 24c1f93 | 2005-11-17 13:58:48 +0100 | [diff] [blame] | 385 | struct snd_info_entry *entry; |
| 386 | struct snd_info_private_data *data; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 387 | int mode; |
| 388 | |
| 389 | mode = file->f_flags & O_ACCMODE; |
| 390 | data = file->private_data; |
| 391 | entry = data->entry; |
| 392 | switch (entry->content) { |
| 393 | case SNDRV_INFO_CONTENT_TEXT: |
| 394 | if (mode == O_RDONLY || mode == O_RDWR) { |
| 395 | vfree(data->rbuffer->buffer); |
| 396 | kfree(data->rbuffer); |
| 397 | } |
| 398 | if (mode == O_WRONLY || mode == O_RDWR) { |
| 399 | if (entry->c.text.write) { |
| 400 | entry->c.text.write(entry, data->wbuffer); |
| 401 | if (data->wbuffer->error) { |
| 402 | snd_printk(KERN_WARNING "data write error to %s (%i)\n", |
| 403 | entry->name, |
| 404 | data->wbuffer->error); |
| 405 | } |
| 406 | } |
| 407 | vfree(data->wbuffer->buffer); |
| 408 | kfree(data->wbuffer); |
| 409 | } |
| 410 | break; |
| 411 | case SNDRV_INFO_CONTENT_DATA: |
| 412 | if (entry->c.ops->release) |
| 413 | entry->c.ops->release(entry, mode, |
| 414 | data->file_private_data); |
| 415 | break; |
| 416 | } |
| 417 | module_put(entry->module); |
| 418 | kfree(data); |
| 419 | return 0; |
| 420 | } |
| 421 | |
| 422 | static unsigned int snd_info_entry_poll(struct file *file, poll_table * wait) |
| 423 | { |
Takashi Iwai | 24c1f93 | 2005-11-17 13:58:48 +0100 | [diff] [blame] | 424 | struct snd_info_private_data *data; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 425 | struct snd_info_entry *entry; |
| 426 | unsigned int mask; |
| 427 | |
| 428 | data = file->private_data; |
| 429 | if (data == NULL) |
| 430 | return 0; |
| 431 | entry = data->entry; |
| 432 | mask = 0; |
| 433 | switch (entry->content) { |
| 434 | case SNDRV_INFO_CONTENT_DATA: |
| 435 | if (entry->c.ops->poll) |
| 436 | return entry->c.ops->poll(entry, |
| 437 | data->file_private_data, |
| 438 | file, wait); |
| 439 | if (entry->c.ops->read) |
| 440 | mask |= POLLIN | POLLRDNORM; |
| 441 | if (entry->c.ops->write) |
| 442 | mask |= POLLOUT | POLLWRNORM; |
| 443 | break; |
| 444 | } |
| 445 | return mask; |
| 446 | } |
| 447 | |
Ingo Molnar | d99e988 | 2006-01-09 16:44:46 +0100 | [diff] [blame] | 448 | static long snd_info_entry_ioctl(struct file *file, unsigned int cmd, |
| 449 | unsigned long arg) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 450 | { |
Takashi Iwai | 24c1f93 | 2005-11-17 13:58:48 +0100 | [diff] [blame] | 451 | struct snd_info_private_data *data; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 452 | struct snd_info_entry *entry; |
| 453 | |
| 454 | data = file->private_data; |
| 455 | if (data == NULL) |
| 456 | return 0; |
| 457 | entry = data->entry; |
| 458 | switch (entry->content) { |
| 459 | case SNDRV_INFO_CONTENT_DATA: |
| 460 | if (entry->c.ops->ioctl) |
| 461 | return entry->c.ops->ioctl(entry, |
| 462 | data->file_private_data, |
| 463 | file, cmd, arg); |
| 464 | break; |
| 465 | } |
| 466 | return -ENOTTY; |
| 467 | } |
| 468 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 469 | static int snd_info_entry_mmap(struct file *file, struct vm_area_struct *vma) |
| 470 | { |
| 471 | struct inode *inode = file->f_dentry->d_inode; |
Takashi Iwai | 24c1f93 | 2005-11-17 13:58:48 +0100 | [diff] [blame] | 472 | struct snd_info_private_data *data; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 473 | struct snd_info_entry *entry; |
| 474 | |
| 475 | data = file->private_data; |
| 476 | if (data == NULL) |
| 477 | return 0; |
| 478 | entry = data->entry; |
| 479 | switch (entry->content) { |
| 480 | case SNDRV_INFO_CONTENT_DATA: |
| 481 | if (entry->c.ops->mmap) |
| 482 | return entry->c.ops->mmap(entry, |
| 483 | data->file_private_data, |
| 484 | inode, file, vma); |
| 485 | break; |
| 486 | } |
| 487 | return -ENXIO; |
| 488 | } |
| 489 | |
| 490 | static struct file_operations snd_info_entry_operations = |
| 491 | { |
Ingo Molnar | d99e988 | 2006-01-09 16:44:46 +0100 | [diff] [blame] | 492 | .owner = THIS_MODULE, |
| 493 | .llseek = snd_info_entry_llseek, |
| 494 | .read = snd_info_entry_read, |
| 495 | .write = snd_info_entry_write, |
| 496 | .poll = snd_info_entry_poll, |
| 497 | .unlocked_ioctl = snd_info_entry_ioctl, |
| 498 | .mmap = snd_info_entry_mmap, |
| 499 | .open = snd_info_entry_open, |
| 500 | .release = snd_info_entry_release, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 501 | }; |
| 502 | |
| 503 | /** |
| 504 | * snd_create_proc_entry - create a procfs entry |
| 505 | * @name: the name of the proc file |
| 506 | * @mode: the file permission bits, S_Ixxx |
| 507 | * @parent: the parent proc-directory entry |
| 508 | * |
| 509 | * Creates a new proc file entry with the given name and permission |
| 510 | * on the given directory. |
| 511 | * |
| 512 | * Returns the pointer of new instance or NULL on failure. |
| 513 | */ |
| 514 | static struct proc_dir_entry *snd_create_proc_entry(const char *name, mode_t mode, |
| 515 | struct proc_dir_entry *parent) |
| 516 | { |
| 517 | struct proc_dir_entry *p; |
| 518 | p = create_proc_entry(name, mode, parent); |
| 519 | if (p) |
| 520 | snd_info_entry_prepare(p); |
| 521 | return p; |
| 522 | } |
| 523 | |
| 524 | int __init snd_info_init(void) |
| 525 | { |
| 526 | struct proc_dir_entry *p; |
| 527 | |
| 528 | p = snd_create_proc_entry("asound", S_IFDIR | S_IRUGO | S_IXUGO, &proc_root); |
| 529 | if (p == NULL) |
| 530 | return -ENOMEM; |
| 531 | snd_proc_root = p; |
| 532 | #ifdef CONFIG_SND_OSSEMUL |
| 533 | { |
Takashi Iwai | 24c1f93 | 2005-11-17 13:58:48 +0100 | [diff] [blame] | 534 | struct snd_info_entry *entry; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 535 | if ((entry = snd_info_create_module_entry(THIS_MODULE, "oss", NULL)) == NULL) |
| 536 | return -ENOMEM; |
| 537 | entry->mode = S_IFDIR | S_IRUGO | S_IXUGO; |
| 538 | if (snd_info_register(entry) < 0) { |
| 539 | snd_info_free_entry(entry); |
| 540 | return -ENOMEM; |
| 541 | } |
| 542 | snd_oss_root = entry; |
| 543 | } |
| 544 | #endif |
| 545 | #if defined(CONFIG_SND_SEQUENCER) || defined(CONFIG_SND_SEQUENCER_MODULE) |
| 546 | { |
Takashi Iwai | 24c1f93 | 2005-11-17 13:58:48 +0100 | [diff] [blame] | 547 | struct snd_info_entry *entry; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 548 | if ((entry = snd_info_create_module_entry(THIS_MODULE, "seq", NULL)) == NULL) |
| 549 | return -ENOMEM; |
| 550 | entry->mode = S_IFDIR | S_IRUGO | S_IXUGO; |
| 551 | if (snd_info_register(entry) < 0) { |
| 552 | snd_info_free_entry(entry); |
| 553 | return -ENOMEM; |
| 554 | } |
| 555 | snd_seq_root = entry; |
| 556 | } |
| 557 | #endif |
| 558 | snd_info_version_init(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 559 | snd_minor_info_init(); |
| 560 | snd_minor_info_oss_init(); |
| 561 | snd_card_info_init(); |
| 562 | return 0; |
| 563 | } |
| 564 | |
| 565 | int __exit snd_info_done(void) |
| 566 | { |
| 567 | snd_card_info_done(); |
| 568 | snd_minor_info_oss_done(); |
| 569 | snd_minor_info_done(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 570 | snd_info_version_done(); |
| 571 | if (snd_proc_root) { |
| 572 | #if defined(CONFIG_SND_SEQUENCER) || defined(CONFIG_SND_SEQUENCER_MODULE) |
Takashi Iwai | e28563c | 2005-12-01 10:42:42 +0100 | [diff] [blame] | 573 | snd_info_unregister(snd_seq_root); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 574 | #endif |
| 575 | #ifdef CONFIG_SND_OSSEMUL |
Takashi Iwai | e28563c | 2005-12-01 10:42:42 +0100 | [diff] [blame] | 576 | snd_info_unregister(snd_oss_root); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 577 | #endif |
| 578 | snd_remove_proc_entry(&proc_root, snd_proc_root); |
| 579 | } |
| 580 | return 0; |
| 581 | } |
| 582 | |
| 583 | /* |
| 584 | |
| 585 | */ |
| 586 | |
| 587 | |
| 588 | /* |
| 589 | * create a card proc file |
| 590 | * called from init.c |
| 591 | */ |
Takashi Iwai | 24c1f93 | 2005-11-17 13:58:48 +0100 | [diff] [blame] | 592 | int snd_info_card_create(struct snd_card *card) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 593 | { |
| 594 | char str[8]; |
Takashi Iwai | 24c1f93 | 2005-11-17 13:58:48 +0100 | [diff] [blame] | 595 | struct snd_info_entry *entry; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 596 | |
| 597 | snd_assert(card != NULL, return -ENXIO); |
| 598 | |
| 599 | sprintf(str, "card%i", card->number); |
| 600 | if ((entry = snd_info_create_module_entry(card->module, str, NULL)) == NULL) |
| 601 | return -ENOMEM; |
| 602 | entry->mode = S_IFDIR | S_IRUGO | S_IXUGO; |
| 603 | if (snd_info_register(entry) < 0) { |
| 604 | snd_info_free_entry(entry); |
| 605 | return -ENOMEM; |
| 606 | } |
| 607 | card->proc_root = entry; |
| 608 | return 0; |
| 609 | } |
| 610 | |
| 611 | /* |
| 612 | * register the card proc file |
| 613 | * called from init.c |
| 614 | */ |
Takashi Iwai | 24c1f93 | 2005-11-17 13:58:48 +0100 | [diff] [blame] | 615 | int snd_info_card_register(struct snd_card *card) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 616 | { |
| 617 | struct proc_dir_entry *p; |
| 618 | |
| 619 | snd_assert(card != NULL, return -ENXIO); |
| 620 | |
| 621 | if (!strcmp(card->id, card->proc_root->name)) |
| 622 | return 0; |
| 623 | |
| 624 | p = proc_symlink(card->id, snd_proc_root, card->proc_root->name); |
| 625 | if (p == NULL) |
| 626 | return -ENOMEM; |
| 627 | card->proc_root_link = p; |
| 628 | return 0; |
| 629 | } |
| 630 | |
| 631 | /* |
| 632 | * de-register the card proc file |
| 633 | * called from init.c |
| 634 | */ |
Takashi Iwai | 24c1f93 | 2005-11-17 13:58:48 +0100 | [diff] [blame] | 635 | int snd_info_card_free(struct snd_card *card) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 636 | { |
| 637 | snd_assert(card != NULL, return -ENXIO); |
| 638 | if (card->proc_root_link) { |
| 639 | snd_remove_proc_entry(snd_proc_root, card->proc_root_link); |
| 640 | card->proc_root_link = NULL; |
| 641 | } |
| 642 | if (card->proc_root) { |
| 643 | snd_info_unregister(card->proc_root); |
| 644 | card->proc_root = NULL; |
| 645 | } |
| 646 | return 0; |
| 647 | } |
| 648 | |
| 649 | |
| 650 | /** |
| 651 | * snd_info_get_line - read one line from the procfs buffer |
| 652 | * @buffer: the procfs buffer |
| 653 | * @line: the buffer to store |
| 654 | * @len: the max. buffer size - 1 |
| 655 | * |
| 656 | * Reads one line from the buffer and stores the string. |
| 657 | * |
| 658 | * Returns zero if successful, or 1 if error or EOF. |
| 659 | */ |
Takashi Iwai | 24c1f93 | 2005-11-17 13:58:48 +0100 | [diff] [blame] | 660 | int snd_info_get_line(struct snd_info_buffer *buffer, char *line, int len) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 661 | { |
| 662 | int c = -1; |
| 663 | |
| 664 | if (len <= 0 || buffer->stop || buffer->error) |
| 665 | return 1; |
| 666 | while (--len > 0) { |
| 667 | c = *buffer->curr++; |
| 668 | if (c == '\n') { |
| 669 | if ((buffer->curr - buffer->buffer) >= (long)buffer->size) { |
| 670 | buffer->stop = 1; |
| 671 | } |
| 672 | break; |
| 673 | } |
| 674 | *line++ = c; |
| 675 | if ((buffer->curr - buffer->buffer) >= (long)buffer->size) { |
| 676 | buffer->stop = 1; |
| 677 | break; |
| 678 | } |
| 679 | } |
| 680 | while (c != '\n' && !buffer->stop) { |
| 681 | c = *buffer->curr++; |
| 682 | if ((buffer->curr - buffer->buffer) >= (long)buffer->size) { |
| 683 | buffer->stop = 1; |
| 684 | } |
| 685 | } |
| 686 | *line = '\0'; |
| 687 | return 0; |
| 688 | } |
| 689 | |
| 690 | /** |
Henrik Kretzschmar | 856def8 | 2005-07-08 13:53:42 +0200 | [diff] [blame] | 691 | * snd_info_get_str - parse a string token |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 692 | * @dest: the buffer to store the string token |
| 693 | * @src: the original string |
| 694 | * @len: the max. length of token - 1 |
| 695 | * |
| 696 | * Parses the original string and copy a token to the given |
| 697 | * string buffer. |
| 698 | * |
| 699 | * Returns the updated pointer of the original string so that |
| 700 | * it can be used for the next call. |
| 701 | */ |
| 702 | char *snd_info_get_str(char *dest, char *src, int len) |
| 703 | { |
| 704 | int c; |
| 705 | |
| 706 | while (*src == ' ' || *src == '\t') |
| 707 | src++; |
| 708 | if (*src == '"' || *src == '\'') { |
| 709 | c = *src++; |
| 710 | while (--len > 0 && *src && *src != c) { |
| 711 | *dest++ = *src++; |
| 712 | } |
| 713 | if (*src == c) |
| 714 | src++; |
| 715 | } else { |
| 716 | while (--len > 0 && *src && *src != ' ' && *src != '\t') { |
| 717 | *dest++ = *src++; |
| 718 | } |
| 719 | } |
| 720 | *dest = 0; |
| 721 | while (*src == ' ' || *src == '\t') |
| 722 | src++; |
| 723 | return src; |
| 724 | } |
| 725 | |
| 726 | /** |
| 727 | * snd_info_create_entry - create an info entry |
| 728 | * @name: the proc file name |
| 729 | * |
| 730 | * Creates an info entry with the given file name and initializes as |
| 731 | * the default state. |
| 732 | * |
| 733 | * Usually called from other functions such as |
| 734 | * snd_info_create_card_entry(). |
| 735 | * |
| 736 | * Returns the pointer of the new instance, or NULL on failure. |
| 737 | */ |
Takashi Iwai | 24c1f93 | 2005-11-17 13:58:48 +0100 | [diff] [blame] | 738 | static struct snd_info_entry *snd_info_create_entry(const char *name) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 739 | { |
Takashi Iwai | 24c1f93 | 2005-11-17 13:58:48 +0100 | [diff] [blame] | 740 | struct snd_info_entry *entry; |
Takashi Iwai | ca2c096 | 2005-09-09 14:20:23 +0200 | [diff] [blame] | 741 | entry = kzalloc(sizeof(*entry), GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 742 | if (entry == NULL) |
| 743 | return NULL; |
Paulo Marques | 543537b | 2005-06-23 00:09:02 -0700 | [diff] [blame] | 744 | entry->name = kstrdup(name, GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 745 | if (entry->name == NULL) { |
| 746 | kfree(entry); |
| 747 | return NULL; |
| 748 | } |
| 749 | entry->mode = S_IFREG | S_IRUGO; |
| 750 | entry->content = SNDRV_INFO_CONTENT_TEXT; |
Ingo Molnar | 1a60d4c | 2006-01-16 16:29:08 +0100 | [diff] [blame] | 751 | mutex_init(&entry->access); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 752 | return entry; |
| 753 | } |
| 754 | |
| 755 | /** |
| 756 | * snd_info_create_module_entry - create an info entry for the given module |
| 757 | * @module: the module pointer |
| 758 | * @name: the file name |
| 759 | * @parent: the parent directory |
| 760 | * |
| 761 | * Creates a new info entry and assigns it to the given module. |
| 762 | * |
| 763 | * Returns the pointer of the new instance, or NULL on failure. |
| 764 | */ |
Takashi Iwai | 24c1f93 | 2005-11-17 13:58:48 +0100 | [diff] [blame] | 765 | struct snd_info_entry *snd_info_create_module_entry(struct module * module, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 766 | const char *name, |
Takashi Iwai | 24c1f93 | 2005-11-17 13:58:48 +0100 | [diff] [blame] | 767 | struct snd_info_entry *parent) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 768 | { |
Takashi Iwai | 24c1f93 | 2005-11-17 13:58:48 +0100 | [diff] [blame] | 769 | struct snd_info_entry *entry = snd_info_create_entry(name); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 770 | if (entry) { |
| 771 | entry->module = module; |
| 772 | entry->parent = parent; |
| 773 | } |
| 774 | return entry; |
| 775 | } |
| 776 | |
| 777 | /** |
| 778 | * snd_info_create_card_entry - create an info entry for the given card |
| 779 | * @card: the card instance |
| 780 | * @name: the file name |
| 781 | * @parent: the parent directory |
| 782 | * |
| 783 | * Creates a new info entry and assigns it to the given card. |
| 784 | * |
| 785 | * Returns the pointer of the new instance, or NULL on failure. |
| 786 | */ |
Takashi Iwai | 24c1f93 | 2005-11-17 13:58:48 +0100 | [diff] [blame] | 787 | struct snd_info_entry *snd_info_create_card_entry(struct snd_card *card, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 788 | const char *name, |
Takashi Iwai | 24c1f93 | 2005-11-17 13:58:48 +0100 | [diff] [blame] | 789 | struct snd_info_entry * parent) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 790 | { |
Takashi Iwai | 24c1f93 | 2005-11-17 13:58:48 +0100 | [diff] [blame] | 791 | struct snd_info_entry *entry = snd_info_create_entry(name); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 792 | if (entry) { |
| 793 | entry->module = card->module; |
| 794 | entry->card = card; |
| 795 | entry->parent = parent; |
| 796 | } |
| 797 | return entry; |
| 798 | } |
| 799 | |
Takashi Iwai | 24c1f93 | 2005-11-17 13:58:48 +0100 | [diff] [blame] | 800 | static int snd_info_dev_free_entry(struct snd_device *device) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 801 | { |
Takashi Iwai | 24c1f93 | 2005-11-17 13:58:48 +0100 | [diff] [blame] | 802 | struct snd_info_entry *entry = device->device_data; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 803 | snd_info_free_entry(entry); |
| 804 | return 0; |
| 805 | } |
| 806 | |
Takashi Iwai | 24c1f93 | 2005-11-17 13:58:48 +0100 | [diff] [blame] | 807 | static int snd_info_dev_register_entry(struct snd_device *device) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 808 | { |
Takashi Iwai | 24c1f93 | 2005-11-17 13:58:48 +0100 | [diff] [blame] | 809 | struct snd_info_entry *entry = device->device_data; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 810 | return snd_info_register(entry); |
| 811 | } |
| 812 | |
Takashi Iwai | 24c1f93 | 2005-11-17 13:58:48 +0100 | [diff] [blame] | 813 | static int snd_info_dev_disconnect_entry(struct snd_device *device) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 814 | { |
Takashi Iwai | 24c1f93 | 2005-11-17 13:58:48 +0100 | [diff] [blame] | 815 | struct snd_info_entry *entry = device->device_data; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 816 | entry->disconnected = 1; |
| 817 | return 0; |
| 818 | } |
| 819 | |
Takashi Iwai | 24c1f93 | 2005-11-17 13:58:48 +0100 | [diff] [blame] | 820 | static int snd_info_dev_unregister_entry(struct snd_device *device) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 821 | { |
Takashi Iwai | 24c1f93 | 2005-11-17 13:58:48 +0100 | [diff] [blame] | 822 | struct snd_info_entry *entry = device->device_data; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 823 | return snd_info_unregister(entry); |
| 824 | } |
| 825 | |
| 826 | /** |
| 827 | * snd_card_proc_new - create an info entry for the given card |
| 828 | * @card: the card instance |
| 829 | * @name: the file name |
| 830 | * @entryp: the pointer to store the new info entry |
| 831 | * |
| 832 | * Creates a new info entry and assigns it to the given card. |
| 833 | * Unlike snd_info_create_card_entry(), this function registers the |
| 834 | * info entry as an ALSA device component, so that it can be |
| 835 | * unregistered/released without explicit call. |
| 836 | * Also, you don't have to register this entry via snd_info_register(), |
| 837 | * since this will be registered by snd_card_register() automatically. |
| 838 | * |
| 839 | * The parent is assumed as card->proc_root. |
| 840 | * |
| 841 | * For releasing this entry, use snd_device_free() instead of |
| 842 | * snd_info_free_entry(). |
| 843 | * |
| 844 | * Returns zero if successful, or a negative error code on failure. |
| 845 | */ |
Takashi Iwai | 24c1f93 | 2005-11-17 13:58:48 +0100 | [diff] [blame] | 846 | int snd_card_proc_new(struct snd_card *card, const char *name, |
| 847 | struct snd_info_entry **entryp) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 848 | { |
Takashi Iwai | 24c1f93 | 2005-11-17 13:58:48 +0100 | [diff] [blame] | 849 | static struct snd_device_ops ops = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 850 | .dev_free = snd_info_dev_free_entry, |
| 851 | .dev_register = snd_info_dev_register_entry, |
| 852 | .dev_disconnect = snd_info_dev_disconnect_entry, |
| 853 | .dev_unregister = snd_info_dev_unregister_entry |
| 854 | }; |
Takashi Iwai | 24c1f93 | 2005-11-17 13:58:48 +0100 | [diff] [blame] | 855 | struct snd_info_entry *entry; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 856 | int err; |
| 857 | |
| 858 | entry = snd_info_create_card_entry(card, name, card->proc_root); |
| 859 | if (! entry) |
| 860 | return -ENOMEM; |
| 861 | if ((err = snd_device_new(card, SNDRV_DEV_INFO, entry, &ops)) < 0) { |
| 862 | snd_info_free_entry(entry); |
| 863 | return err; |
| 864 | } |
| 865 | if (entryp) |
| 866 | *entryp = entry; |
| 867 | return 0; |
| 868 | } |
| 869 | |
| 870 | /** |
| 871 | * snd_info_free_entry - release the info entry |
| 872 | * @entry: the info entry |
| 873 | * |
| 874 | * Releases the info entry. Don't call this after registered. |
| 875 | */ |
Takashi Iwai | 24c1f93 | 2005-11-17 13:58:48 +0100 | [diff] [blame] | 876 | void snd_info_free_entry(struct snd_info_entry * entry) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 877 | { |
| 878 | if (entry == NULL) |
| 879 | return; |
| 880 | kfree(entry->name); |
| 881 | if (entry->private_free) |
| 882 | entry->private_free(entry); |
| 883 | kfree(entry); |
| 884 | } |
| 885 | |
| 886 | /** |
| 887 | * snd_info_register - register the info entry |
| 888 | * @entry: the info entry |
| 889 | * |
| 890 | * Registers the proc info entry. |
| 891 | * |
| 892 | * Returns zero if successful, or a negative error code on failure. |
| 893 | */ |
Takashi Iwai | 24c1f93 | 2005-11-17 13:58:48 +0100 | [diff] [blame] | 894 | int snd_info_register(struct snd_info_entry * entry) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 895 | { |
| 896 | struct proc_dir_entry *root, *p = NULL; |
| 897 | |
| 898 | snd_assert(entry != NULL, return -ENXIO); |
| 899 | root = entry->parent == NULL ? snd_proc_root : entry->parent->p; |
Ingo Molnar | 1a60d4c | 2006-01-16 16:29:08 +0100 | [diff] [blame] | 900 | mutex_lock(&info_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 901 | p = snd_create_proc_entry(entry->name, entry->mode, root); |
| 902 | if (!p) { |
Ingo Molnar | 1a60d4c | 2006-01-16 16:29:08 +0100 | [diff] [blame] | 903 | mutex_unlock(&info_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 904 | return -ENOMEM; |
| 905 | } |
| 906 | p->owner = entry->module; |
| 907 | if (!S_ISDIR(entry->mode)) |
| 908 | p->proc_fops = &snd_info_entry_operations; |
| 909 | p->size = entry->size; |
| 910 | p->data = entry; |
| 911 | entry->p = p; |
Ingo Molnar | 1a60d4c | 2006-01-16 16:29:08 +0100 | [diff] [blame] | 912 | mutex_unlock(&info_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 913 | return 0; |
| 914 | } |
| 915 | |
| 916 | /** |
| 917 | * snd_info_unregister - de-register the info entry |
| 918 | * @entry: the info entry |
| 919 | * |
| 920 | * De-registers the info entry and releases the instance. |
| 921 | * |
| 922 | * Returns zero if successful, or a negative error code on failure. |
| 923 | */ |
Takashi Iwai | 24c1f93 | 2005-11-17 13:58:48 +0100 | [diff] [blame] | 924 | int snd_info_unregister(struct snd_info_entry * entry) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 925 | { |
| 926 | struct proc_dir_entry *root; |
| 927 | |
Takashi Iwai | e28563c | 2005-12-01 10:42:42 +0100 | [diff] [blame] | 928 | if (! entry) |
| 929 | return 0; |
Henrik Kretzschmar | 856def8 | 2005-07-08 13:53:42 +0200 | [diff] [blame] | 930 | snd_assert(entry->p != NULL, return -ENXIO); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 931 | root = entry->parent == NULL ? snd_proc_root : entry->parent->p; |
| 932 | snd_assert(root, return -ENXIO); |
Ingo Molnar | 1a60d4c | 2006-01-16 16:29:08 +0100 | [diff] [blame] | 933 | mutex_lock(&info_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 934 | snd_remove_proc_entry(root, entry->p); |
Ingo Molnar | 1a60d4c | 2006-01-16 16:29:08 +0100 | [diff] [blame] | 935 | mutex_unlock(&info_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 936 | snd_info_free_entry(entry); |
| 937 | return 0; |
| 938 | } |
| 939 | |
| 940 | /* |
| 941 | |
| 942 | */ |
| 943 | |
Takashi Iwai | 24c1f93 | 2005-11-17 13:58:48 +0100 | [diff] [blame] | 944 | static struct snd_info_entry *snd_info_version_entry = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 945 | |
Takashi Iwai | 24c1f93 | 2005-11-17 13:58:48 +0100 | [diff] [blame] | 946 | static void snd_info_version_read(struct snd_info_entry *entry, struct snd_info_buffer *buffer) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 947 | { |
| 948 | snd_iprintf(buffer, |
| 949 | "Advanced Linux Sound Architecture Driver Version " |
| 950 | CONFIG_SND_VERSION CONFIG_SND_DATE ".\n" |
| 951 | ); |
| 952 | } |
| 953 | |
| 954 | static int __init snd_info_version_init(void) |
| 955 | { |
Takashi Iwai | 24c1f93 | 2005-11-17 13:58:48 +0100 | [diff] [blame] | 956 | struct snd_info_entry *entry; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 957 | |
| 958 | entry = snd_info_create_module_entry(THIS_MODULE, "version", NULL); |
| 959 | if (entry == NULL) |
| 960 | return -ENOMEM; |
| 961 | entry->c.text.read_size = 256; |
| 962 | entry->c.text.read = snd_info_version_read; |
| 963 | if (snd_info_register(entry) < 0) { |
| 964 | snd_info_free_entry(entry); |
| 965 | return -ENOMEM; |
| 966 | } |
| 967 | snd_info_version_entry = entry; |
| 968 | return 0; |
| 969 | } |
| 970 | |
| 971 | static int __exit snd_info_version_done(void) |
| 972 | { |
| 973 | if (snd_info_version_entry) |
| 974 | snd_info_unregister(snd_info_version_entry); |
| 975 | return 0; |
| 976 | } |
| 977 | |
| 978 | #endif /* CONFIG_PROC_FS */ |