include/sound/core.h

   1 #ifndef __SOUND_CORE_H
   2 #define __SOUND_CORE_H
   3
   4 /*
   5  *  Main header file for the ALSA driver
   6  *  Copyright (c) 1994-2001 by Jaroslav Kysela <perex@perex.cz>
   7  *
   8  *
   9  *   This program is free software; you can redistribute it and/or modify
  10  *   it under the terms of the GNU General Public License as published by
  11  *   the Free Software Foundation; either version 2 of the License, or
  12  *   (at your option) any later version.
  13  *
  14  *   This program is distributed in the hope that it will be useful,
  15  *   but WITHOUT ANY WARRANTY; without even the implied warranty of
  16  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17  *   GNU General Public License for more details.
  18  *
  19  *   You should have received a copy of the GNU General Public License
  20  *   along with this program; if not, write to the Free Software
  21  *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
  22  *
  23  */
  24
  25 #include <linux/sched.h>                /* wake_up() */
  26 #include <linux/mutex.h>                /* struct mutex */
  27 #include <linux/rwsem.h>                /* struct rw_semaphore */
  28 #include <linux/pm.h>                   /* pm_message_t */
  29 #include <linux/device.h>
  30
  31 /* forward declarations */
  32 #ifdef CONFIG_PCI
  33 struct pci_dev;
  34 #endif
  35 #ifdef CONFIG_SBUS
  36 struct sbus_dev;
  37 #endif
  38
  39 /* device allocation stuff */
  40
  41 #define SNDRV_DEV_TYPE_RANGE_SIZE               0x1000
  42
  43 typedef int __bitwise snd_device_type_t;
  44 #define SNDRV_DEV_TOPLEVEL      ((__force snd_device_type_t) 0)
  45 #define SNDRV_DEV_CONTROL       ((__force snd_device_type_t) 1)
  46 #define SNDRV_DEV_LOWLEVEL_PRE  ((__force snd_device_type_t) 2)
  47 #define SNDRV_DEV_LOWLEVEL_NORMAL ((__force snd_device_type_t) 0x1000)
  48 #define SNDRV_DEV_PCM           ((__force snd_device_type_t) 0x1001)
  49 #define SNDRV_DEV_RAWMIDI       ((__force snd_device_type_t) 0x1002)
  50 #define SNDRV_DEV_TIMER         ((__force snd_device_type_t) 0x1003)
  51 #define SNDRV_DEV_SEQUENCER     ((__force snd_device_type_t) 0x1004)
  52 #define SNDRV_DEV_HWDEP         ((__force snd_device_type_t) 0x1005)
  53 #define SNDRV_DEV_INFO          ((__force snd_device_type_t) 0x1006)
  54 #define SNDRV_DEV_BUS           ((__force snd_device_type_t) 0x1007)
  55 #define SNDRV_DEV_CODEC         ((__force snd_device_type_t) 0x1008)
  56 #define SNDRV_DEV_LOWLEVEL      ((__force snd_device_type_t) 0x2000)
  57
  58 typedef int __bitwise snd_device_state_t;
  59 #define SNDRV_DEV_BUILD         ((__force snd_device_state_t) 0)
  60 #define SNDRV_DEV_REGISTERED    ((__force snd_device_state_t) 1)
  61 #define SNDRV_DEV_DISCONNECTED  ((__force snd_device_state_t) 2)
  62
  63 typedef int __bitwise snd_device_cmd_t;
  64 #define SNDRV_DEV_CMD_PRE       ((__force snd_device_cmd_t) 0)
  65 #define SNDRV_DEV_CMD_NORMAL    ((__force snd_device_cmd_t) 1)
  66 #define SNDRV_DEV_CMD_POST      ((__force snd_device_cmd_t) 2)
  67
  68 struct snd_device;
  69
  70 struct snd_device_ops {
  71         int (*dev_free)(struct snd_device *dev);
  72         int (*dev_register)(struct snd_device *dev);
  73         int (*dev_disconnect)(struct snd_device *dev);
  74 };
  75
  76 struct snd_device {
  77         struct list_head list;          /* list of registered devices */
  78         struct snd_card *card;          /* card which holds this device */
  79         snd_device_state_t state;       /* state of the device */
  80         snd_device_type_t type;         /* device type */
  81         void *device_data;              /* device structure */
  82         struct snd_device_ops *ops;     /* operations */
  83 };
  84
  85 #define snd_device(n) list_entry(n, struct snd_device, list)
  86
  87 /* monitor files for graceful shutdown (hotplug) */
  88
  89 struct snd_monitor_file {
  90         struct file *file;
  91         struct snd_monitor_file *next;
  92         const struct file_operations *disconnected_f_op;
  93         struct list_head shutdown_list;
  94 };
  95
  96 /* main structure for soundcard */
  97
  98 struct snd_card {
  99         int number;                     /* number of soundcard (index to
 100                                                                 snd_cards) */
 101
 102         char id[16];                    /* id string of this card */
 103         char driver[16];                /* driver name */
 104         char shortname[32];             /* short name of this soundcard */
 105         char longname[80];              /* name of this soundcard */
 106         char mixername[80];             /* mixer name */
 107         char components[80];            /* card components delimited with
 108                                                                 space */
 109         struct module *module;          /* top-level module */
 110
 111         void *private_data;             /* private data for soundcard */
 112         void (*private_free) (struct snd_card *card); /* callback for freeing of
 113                                                                 private data */
 114         struct list_head devices;       /* devices */
 115
 116         unsigned int last_numid;        /* last used numeric ID */
 117         struct rw_semaphore controls_rwsem;     /* controls list lock */
 118         rwlock_t ctl_files_rwlock;      /* ctl_files list lock */
 119         int controls_count;             /* count of all controls */
 120         int user_ctl_count;             /* count of all user controls */
 121         struct list_head controls;      /* all controls for this card */
 122         struct list_head ctl_files;     /* active control files */
 123
 124         struct snd_info_entry *proc_root;       /* root for soundcard specific files */
 125         struct snd_info_entry *proc_id; /* the card id */
 126         struct proc_dir_entry *proc_root_link;  /* number link to real id */
 127
 128         struct snd_monitor_file *files; /* all files associated to this card */
 129         struct snd_shutdown_f_ops *s_f_ops; /* file operations in the shutdown
 130                                                                 state */
 131         spinlock_t files_lock;          /* lock the files for this card */
 132         int shutdown;                   /* this card is going down */
 133         int free_on_last_close;         /* free in context of file_release */
 134         wait_queue_head_t shutdown_sleep;
 135         struct device *dev;             /* device assigned to this card */
 136 #ifndef CONFIG_SYSFS_DEPRECATED
 137         struct device *card_dev;        /* cardX object for sysfs */
 138 #endif
 139
 140 #ifdef CONFIG_PM
 141         unsigned int power_state;       /* power state */
 142         struct mutex power_lock;        /* power lock */
 143         wait_queue_head_t power_sleep;
 144 #endif
 145
 146 #if defined(CONFIG_SND_MIXER_OSS) || defined(CONFIG_SND_MIXER_OSS_MODULE)
 147         struct snd_mixer_oss *mixer_oss;
 148         int mixer_oss_change_count;
 149 #endif
 150 };
 151
 152 #ifdef CONFIG_PM
 153 static inline void snd_power_lock(struct snd_card *card)
 154 {
 155         mutex_lock(&card->power_lock);
 156 }
 157
 158 static inline void snd_power_unlock(struct snd_card *card)
 159 {
 160         mutex_unlock(&card->power_lock);
 161 }
 162
 163 static inline unsigned int snd_power_get_state(struct snd_card *card)
 164 {
 165         return card->power_state;
 166 }
 167
 168 static inline void snd_power_change_state(struct snd_card *card, unsigned int state)
 169 {
 170         card->power_state = state;
 171         wake_up(&card->power_sleep);
 172 }
 173
 174 /* init.c */
 175 int snd_power_wait(struct snd_card *card, unsigned int power_state);
 176
 177 #else /* ! CONFIG_PM */
 178
 179 #define snd_power_lock(card)            do { (void)(card); } while (0)
 180 #define snd_power_unlock(card)          do { (void)(card); } while (0)
 181 static inline int snd_power_wait(struct snd_card *card, unsigned int state) { return 0; }
 182 #define snd_power_get_state(card)       SNDRV_CTL_POWER_D0
 183 #define snd_power_change_state(card, state)     do { (void)(card); } while (0)
 184
 185 #endif /* CONFIG_PM */
 186
 187 struct snd_minor {
 188         int type;                       /* SNDRV_DEVICE_TYPE_XXX */
 189         int card;                       /* card number */
 190         int device;                     /* device number */
 191         const struct file_operations *f_ops;    /* file operations */
 192         void *private_data;             /* private data for f_ops->open */
 193         struct device *dev;             /* device for sysfs */
 194 };
 195
 196 /* return a device pointer linked to each sound device as a parent */
 197 static inline struct device *snd_card_get_device_link(struct snd_card *card)
 198 {
 199 #ifdef CONFIG_SYSFS_DEPRECATED
 200         return card ? card->dev : NULL;
 201 #else
 202         return card ? card->card_dev : NULL;
 203 #endif
 204 }
 205
 206 /* sound.c */
 207
 208 extern int snd_major;
 209 extern int snd_ecards_limit;
 210 extern struct class *sound_class;
 211
 212 void snd_request_card(int card);
 213
 214 int snd_register_device_for_dev(int type, struct snd_card *card,
 215                                 int dev,
 216                                 const struct file_operations *f_ops,
 217                                 void *private_data,
 218                                 const char *name,
 219                                 struct device *device);
 220
 221 /**
 222  * snd_register_device - Register the ALSA device file for the card
 223  * @type: the device type, SNDRV_DEVICE_TYPE_XXX
 224  * @card: the card instance
 225  * @dev: the device index
 226  * @f_ops: the file operations
 227  * @private_data: user pointer for f_ops->open()
 228  * @name: the device file name
 229  *
 230  * Registers an ALSA device file for the given card.
 231  * The operators have to be set in reg parameter.
 232  *
 233  * This function uses the card's device pointer to link to the
 234  * correct &struct device.
 235  *
 236  * Returns zero if successful, or a negative error code on failure.
 237  */
 238 static inline int snd_register_device(int type, struct snd_card *card, int dev,
 239                                       const struct file_operations *f_ops,
 240                                       void *private_data,
 241                                       const char *name)
 242 {
 243         return snd_register_device_for_dev(type, card, dev, f_ops,
 244                                            private_data, name,
 245                                            snd_card_get_device_link(card));
 246 }
 247
 248 int snd_unregister_device(int type, struct snd_card *card, int dev);
 249 void *snd_lookup_minor_data(unsigned int minor, int type);
 250 int snd_add_device_sysfs_file(int type, struct snd_card *card, int dev,
 251                               struct device_attribute *attr);
 252
 253 #ifdef CONFIG_SND_OSSEMUL
 254 int snd_register_oss_device(int type, struct snd_card *card, int dev,
 255                             const struct file_operations *f_ops, void *private_data,
 256                             const char *name);
 257 int snd_unregister_oss_device(int type, struct snd_card *card, int dev);
 258 void *snd_lookup_oss_minor_data(unsigned int minor, int type);
 259 #endif
 260
 261 int snd_minor_info_init(void);
 262 int snd_minor_info_done(void);
 263
 264 /* sound_oss.c */
 265
 266 #ifdef CONFIG_SND_OSSEMUL
 267 int snd_minor_info_oss_init(void);
 268 int snd_minor_info_oss_done(void);
 269 #else
 270 #define snd_minor_info_oss_init() /*NOP*/
 271 #define snd_minor_info_oss_done() /*NOP*/
 272 #endif
 273
 274 /* memory.c */
 275
 276 int copy_to_user_fromio(void __user *dst, const volatile void __iomem *src, size_t count);
 277 int copy_from_user_toio(volatile void __iomem *dst, const void __user *src, size_t count);
 278
 279 /* init.c */
 280
 281 extern struct snd_card *snd_cards[SNDRV_CARDS];
 282 int snd_card_locked(int card);
 283 #if defined(CONFIG_SND_MIXER_OSS) || defined(CONFIG_SND_MIXER_OSS_MODULE)
 284 #define SND_MIXER_OSS_NOTIFY_REGISTER   0
 285 #define SND_MIXER_OSS_NOTIFY_DISCONNECT 1
 286 #define SND_MIXER_OSS_NOTIFY_FREE       2
 287 extern int (*snd_mixer_oss_notify_callback)(struct snd_card *card, int cmd);
 288 #endif
 289
 290 struct snd_card *snd_card_new(int idx, const char *id,
 291                          struct module *module, int extra_size);
 292 int snd_card_disconnect(struct snd_card *card);
 293 int snd_card_free(struct snd_card *card);
 294 int snd_card_free_when_closed(struct snd_card *card);
 295 int snd_card_register(struct snd_card *card);
 296 int snd_card_info_init(void);
 297 int snd_card_info_done(void);
 298 int snd_component_add(struct snd_card *card, const char *component);
 299 int snd_card_file_add(struct snd_card *card, struct file *file);
 300 int snd_card_file_remove(struct snd_card *card, struct file *file);
 301
 302 #ifndef snd_card_set_dev
 303 #define snd_card_set_dev(card,devptr) ((card)->dev = (devptr))
 304 #endif
 305
 306 /* device.c */
 307
 308 int snd_device_new(struct snd_card *card, snd_device_type_t type,
 309                    void *device_data, struct snd_device_ops *ops);
 310 int snd_device_register(struct snd_card *card, void *device_data);
 311 int snd_device_register_all(struct snd_card *card);
 312 int snd_device_disconnect(struct snd_card *card, void *device_data);
 313 int snd_device_disconnect_all(struct snd_card *card);
 314 int snd_device_free(struct snd_card *card, void *device_data);
 315 int snd_device_free_all(struct snd_card *card, snd_device_cmd_t cmd);
 316
 317 /* isadma.c */
 318
 319 #ifdef CONFIG_ISA_DMA_API
 320 #define DMA_MODE_NO_ENABLE      0x0100
 321
 322 void snd_dma_program(unsigned long dma, unsigned long addr, unsigned int size, unsigned short mode);
 323 void snd_dma_disable(unsigned long dma);
 324 unsigned int snd_dma_pointer(unsigned long dma, unsigned int size);
 325 #endif
 326
 327 /* misc.c */
 328 struct resource;
 329 void release_and_free_resource(struct resource *res);
 330
 331 #ifdef CONFIG_SND_VERBOSE_PRINTK
 332 void snd_verbose_printk(const char *file, int line, const char *format, ...)
 333      __attribute__ ((format (printf, 3, 4)));
 334 #endif
 335 #if defined(CONFIG_SND_DEBUG) && defined(CONFIG_SND_VERBOSE_PRINTK)
 336 void snd_verbose_printd(const char *file, int line, const char *format, ...)
 337      __attribute__ ((format (printf, 3, 4)));
 338 #endif
 339
 340 /* --- */
 341
 342 #ifdef CONFIG_SND_VERBOSE_PRINTK
 343 /**
 344  * snd_printk - printk wrapper
 345  * @fmt: format string
 346  *
 347  * Works like print() but prints the file and the line of the caller
 348  * when configured with CONFIG_SND_VERBOSE_PRINTK.
 349  */
 350 #define snd_printk(fmt, args...) \
 351         snd_verbose_printk(__FILE__, __LINE__, fmt ,##args)
 352 #else
 353 #define snd_printk(fmt, args...) \
 354         printk(fmt ,##args)
 355 #endif
 356
 357 #ifdef CONFIG_SND_DEBUG
 358
 359 #define __ASTRING__(x) #x
 360
 361 #ifdef CONFIG_SND_VERBOSE_PRINTK
 362 /**
 363  * snd_printd - debug printk
 364  * @fmt: format string
 365  *
 366  * Compiled only when Works like snd_printk() for debugging purpose.
 367  * Ignored when CONFIG_SND_DEBUG is not set.
 368  */
 369 #define snd_printd(fmt, args...) \
 370         snd_verbose_printd(__FILE__, __LINE__, fmt ,##args)
 371 #else
 372 #define snd_printd(fmt, args...) \
 373         printk(fmt ,##args)
 374 #endif
 375 /**
 376  * snd_assert - run-time assertion macro
 377  * @expr: expression
 378  *
 379  * This macro checks the expression in run-time and invokes the commands
 380  * given in the rest arguments if the assertion is failed.
 381  * When CONFIG_SND_DEBUG is not set, the expression is executed but
 382  * not checked.
 383  */
 384 #define snd_assert(expr, args...) do {                                  \
 385         if (unlikely(!(expr))) {                                        \
 386                 snd_printk(KERN_ERR "BUG? (%s)\n", __ASTRING__(expr));  \
 387                 dump_stack();                                           \
 388                 args;                                                   \
 389         }                                                               \
 390 } while (0)
 391
 392 #define snd_BUG() do {                          \
 393         snd_printk(KERN_ERR "BUG?\n");          \
 394         dump_stack();                           \
 395 } while (0)
 396
 397 #else /* !CONFIG_SND_DEBUG */
 398
 399 #define snd_printd(fmt, args...)        /* nothing */
 400 #define snd_assert(expr, args...)       (void)(expr)
 401 #define snd_BUG()                       /* nothing */
 402
 403 #endif /* CONFIG_SND_DEBUG */
 404
 405 #ifdef CONFIG_SND_DEBUG_DETECT
 406 /**
 407  * snd_printdd - debug printk
 408  * @format: format string
 409  *
 410  * Compiled only when Works like snd_printk() for debugging purpose.
 411  * Ignored when CONFIG_SND_DEBUG_DETECT is not set.
 412  */
 413 #define snd_printdd(format, args...) snd_printk(format, ##args)
 414 #else
 415 #define snd_printdd(format, args...) /* nothing */
 416 #endif
 417
 418
 419 #define SNDRV_OSS_VERSION         ((3<<16)|(8<<8)|(1<<4)|(0))   /* 3.8.1a */
 420
 421 /* for easier backward-porting */
 422 #if defined(CONFIG_GAMEPORT) || defined(CONFIG_GAMEPORT_MODULE)
 423 #ifndef gameport_set_dev_parent
 424 #define gameport_set_dev_parent(gp,xdev) ((gp)->dev.parent = (xdev))
 425 #define gameport_set_port_data(gp,r) ((gp)->port_data = (r))
 426 #define gameport_get_port_data(gp) (gp)->port_data
 427 #endif
 428 #endif
 429
 430 /* PCI quirk list helper */
 431 struct snd_pci_quirk {
 432         unsigned short subvendor;       /* PCI subvendor ID */
 433         unsigned short subdevice;       /* PCI subdevice ID */
 434         int value;                      /* value */
 435 #ifdef CONFIG_SND_DEBUG_DETECT
 436         const char *name;               /* name of the device (optional) */
 437 #endif
 438 };
 439
 440 #define _SND_PCI_QUIRK_ID(vend,dev) \
 441         .subvendor = (vend), .subdevice = (dev)
 442 #define SND_PCI_QUIRK_ID(vend,dev) {_SND_PCI_QUIRK_ID(vend, dev)}
 443 #ifdef CONFIG_SND_DEBUG_DETECT
 444 #define SND_PCI_QUIRK(vend,dev,xname,val) \
 445         {_SND_PCI_QUIRK_ID(vend, dev), .value = (val), .name = (xname)}
 446 #else
 447 #define SND_PCI_QUIRK(vend,dev,xname,val) \
 448         {_SND_PCI_QUIRK_ID(vend, dev), .value = (val)}
 449 #endif
 450
 451 const struct snd_pci_quirk *
 452 snd_pci_quirk_lookup(struct pci_dev *pci, const struct snd_pci_quirk *list);
 453
 454
 455 #endif /* __SOUND_CORE_H */