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@suse.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 <asm/semaphore.h>              /* struct semaphore */
  27 #include <linux/rwsem.h>                /* struct rw_semaphore */
  28 #include <linux/workqueue.h>            /* struct workqueue_struct */
  29 #include <linux/pm.h>                   /* pm_message_t */
  30
  31 /* Typedef's */
  32 typedef struct sndrv_interval snd_interval_t;
  33 typedef enum sndrv_card_type snd_card_type;
  34 typedef struct sndrv_xferi snd_xferi_t;
  35 typedef struct sndrv_xfern snd_xfern_t;
  36 typedef struct sndrv_xferv snd_xferv_t;
  37
  38 /* forward declarations */
  39 #ifdef CONFIG_PCI
  40 struct pci_dev;
  41 #endif
  42 #ifdef CONFIG_SBUS
  43 struct sbus_dev;
  44 #endif
  45
  46 /* device allocation stuff */
  47
  48 #define SNDRV_DEV_TYPE_RANGE_SIZE               0x1000
  49
  50 typedef enum {
  51         SNDRV_DEV_TOPLEVEL =            (0*SNDRV_DEV_TYPE_RANGE_SIZE),
  52         SNDRV_DEV_CONTROL,
  53         SNDRV_DEV_LOWLEVEL_PRE,
  54         SNDRV_DEV_LOWLEVEL_NORMAL =     (1*SNDRV_DEV_TYPE_RANGE_SIZE),
  55         SNDRV_DEV_PCM,
  56         SNDRV_DEV_RAWMIDI,
  57         SNDRV_DEV_TIMER,
  58         SNDRV_DEV_SEQUENCER,
  59         SNDRV_DEV_HWDEP,
  60         SNDRV_DEV_INFO,
  61         SNDRV_DEV_BUS,
  62         SNDRV_DEV_CODEC,
  63         SNDRV_DEV_LOWLEVEL =            (2*SNDRV_DEV_TYPE_RANGE_SIZE)
  64 } snd_device_type_t;
  65
  66 typedef enum {
  67         SNDRV_DEV_BUILD,
  68         SNDRV_DEV_REGISTERED,
  69         SNDRV_DEV_DISCONNECTED
  70 } snd_device_state_t;
  71
  72 typedef enum {
  73         SNDRV_DEV_CMD_PRE = 0,
  74         SNDRV_DEV_CMD_NORMAL = 1,
  75         SNDRV_DEV_CMD_POST = 2
  76 } snd_device_cmd_t;
  77
  78 typedef struct _snd_card snd_card_t;
  79 typedef struct _snd_device snd_device_t;
  80
  81 typedef int (snd_dev_free_t)(snd_device_t *device);
  82 typedef int (snd_dev_register_t)(snd_device_t *device);
  83 typedef int (snd_dev_disconnect_t)(snd_device_t *device);
  84 typedef int (snd_dev_unregister_t)(snd_device_t *device);
  85
  86 typedef struct {
  87         snd_dev_free_t *dev_free;
  88         snd_dev_register_t *dev_register;
  89         snd_dev_disconnect_t *dev_disconnect;
  90         snd_dev_unregister_t *dev_unregister;
  91 } snd_device_ops_t;
  92
  93 struct _snd_device {
  94         struct list_head list;          /* list of registered devices */
  95         snd_card_t *card;               /* card which holds this device */
  96         snd_device_state_t state;       /* state of the device */
  97         snd_device_type_t type;         /* device type */
  98         void *device_data;              /* device structure */
  99         snd_device_ops_t *ops;          /* operations */
 100 };
 101
 102 #define snd_device(n) list_entry(n, snd_device_t, list)
 103
 104 /* various typedefs */
 105
 106 typedef struct snd_info_entry snd_info_entry_t;
 107 typedef struct _snd_pcm snd_pcm_t;
 108 typedef struct _snd_pcm_str snd_pcm_str_t;
 109 typedef struct _snd_pcm_substream snd_pcm_substream_t;
 110 typedef struct _snd_mixer snd_kmixer_t;
 111 typedef struct _snd_rawmidi snd_rawmidi_t;
 112 typedef struct _snd_ctl_file snd_ctl_file_t;
 113 typedef struct _snd_kcontrol snd_kcontrol_t;
 114 typedef struct _snd_timer snd_timer_t;
 115 typedef struct _snd_timer_instance snd_timer_instance_t;
 116 typedef struct _snd_hwdep snd_hwdep_t;
 117 #if defined(CONFIG_SND_MIXER_OSS) || defined(CONFIG_SND_MIXER_OSS_MODULE)
 118 typedef struct _snd_oss_mixer snd_mixer_oss_t;
 119 #endif
 120
 121 /* monitor files for graceful shutdown (hotplug) */
 122
 123 struct snd_monitor_file {
 124         struct file *file;
 125         struct snd_monitor_file *next;
 126 };
 127
 128 struct snd_shutdown_f_ops;      /* define it later in init.c */
 129
 130 /* main structure for soundcard */
 131
 132 struct _snd_card {
 133         int number;                     /* number of soundcard (index to
 134                                                                 snd_cards) */
 135
 136         char id[16];                    /* id string of this card */
 137         char driver[16];                /* driver name */
 138         char shortname[32];             /* short name of this soundcard */
 139         char longname[80];              /* name of this soundcard */
 140         char mixername[80];             /* mixer name */
 141         char components[80];            /* card components delimited with
 142                                                                 space */
 143         struct module *module;          /* top-level module */
 144
 145         void *private_data;             /* private data for soundcard */
 146         void (*private_free) (snd_card_t *card); /* callback for freeing of
 147                                                                 private data */
 148         struct list_head devices;       /* devices */
 149
 150         unsigned int last_numid;        /* last used numeric ID */
 151         struct rw_semaphore controls_rwsem;     /* controls list lock */
 152         rwlock_t ctl_files_rwlock;      /* ctl_files list lock */
 153         int controls_count;             /* count of all controls */
 154         int user_ctl_count;             /* count of all user controls */
 155         struct list_head controls;      /* all controls for this card */
 156         struct list_head ctl_files;     /* active control files */
 157
 158         snd_info_entry_t *proc_root;    /* root for soundcard specific files */
 159         snd_info_entry_t *proc_id;      /* the card id */
 160         struct proc_dir_entry *proc_root_link;  /* number link to real id */
 161
 162         struct snd_monitor_file *files; /* all files associated to this card */
 163         struct snd_shutdown_f_ops *s_f_ops; /* file operations in the shutdown
 164                                                                 state */
 165         spinlock_t files_lock;          /* lock the files for this card */
 166         int shutdown;                   /* this card is going down */
 167         wait_queue_head_t shutdown_sleep;
 168         struct work_struct free_workq;  /* for free in workqueue */
 169         struct device *dev;
 170 #ifdef CONFIG_SND_GENERIC_DRIVER
 171         struct snd_generic_device *generic_dev;
 172 #endif
 173
 174 #ifdef CONFIG_PM
 175         int (*pm_suspend)(snd_card_t *card, pm_message_t state);
 176         int (*pm_resume)(snd_card_t *card);
 177         void *pm_private_data;
 178         unsigned int power_state;       /* power state */
 179         struct semaphore power_lock;    /* power lock */
 180         wait_queue_head_t power_sleep;
 181 #endif
 182
 183 #if defined(CONFIG_SND_MIXER_OSS) || defined(CONFIG_SND_MIXER_OSS_MODULE)
 184         snd_mixer_oss_t *mixer_oss;
 185         int mixer_oss_change_count;
 186 #endif
 187 };
 188
 189 #ifdef CONFIG_PM
 190 static inline void snd_power_lock(snd_card_t *card)
 191 {
 192         down(&card->power_lock);
 193 }
 194
 195 static inline void snd_power_unlock(snd_card_t *card)
 196 {
 197         up(&card->power_lock);
 198 }
 199
 200 static inline unsigned int snd_power_get_state(snd_card_t *card)
 201 {
 202         return card->power_state;
 203 }
 204
 205 static inline void snd_power_change_state(snd_card_t *card, unsigned int state)
 206 {
 207         card->power_state = state;
 208         wake_up(&card->power_sleep);
 209 }
 210
 211 /* init.c */
 212 int snd_power_wait(snd_card_t *card, unsigned int power_state, struct file *file);
 213
 214 int snd_card_set_pm_callback(snd_card_t *card,
 215                              int (*suspend)(snd_card_t *, pm_message_t),
 216                              int (*resume)(snd_card_t *),
 217                              void *private_data);
 218 int snd_card_set_generic_pm_callback(snd_card_t *card,
 219                                      int (*suspend)(snd_card_t *, pm_message_t),
 220                                      int (*resume)(snd_card_t *),
 221                                      void *private_data);
 222 #define snd_card_set_isa_pm_callback(card,suspend,resume,data) \
 223         snd_card_set_generic_pm_callback(card, suspend, resume, data)
 224 struct pci_dev;
 225 int snd_card_pci_suspend(struct pci_dev *dev, pm_message_t state);
 226 int snd_card_pci_resume(struct pci_dev *dev);
 227 #define SND_PCI_PM_CALLBACKS \
 228         .suspend = snd_card_pci_suspend,  .resume = snd_card_pci_resume
 229
 230 #else /* ! CONFIG_PM */
 231
 232 #define snd_power_lock(card)            do { (void)(card); } while (0)
 233 #define snd_power_unlock(card)          do { (void)(card); } while (0)
 234 static inline int snd_power_wait(snd_card_t *card, unsigned int state, struct file *file) { return 0; }
 235 #define snd_power_get_state(card)       SNDRV_CTL_POWER_D0
 236 #define snd_power_change_state(card, state)     do { (void)(card); } while (0)
 237 #define snd_card_set_pm_callback(card,suspend,resume,data)
 238 #define snd_card_set_generic_pm_callback(card,suspend,resume,data)
 239 #define snd_card_set_isa_pm_callback(card,suspend,resume,data)
 240 #define SND_PCI_PM_CALLBACKS
 241
 242 #endif /* CONFIG_PM */
 243
 244 struct _snd_minor {
 245         struct list_head list;          /* list of all minors per card */
 246         int number;                     /* minor number */
 247         int device;                     /* device number */
 248         const char *comment;            /* for /proc/asound/devices */
 249         struct file_operations *f_ops;  /* file operations */
 250         char name[0];                   /* device name (keep at the end of
 251                                                                 structure) */
 252 };
 253
 254 typedef struct _snd_minor snd_minor_t;
 255
 256 /* sound.c */
 257
 258 extern int snd_major;
 259 extern int snd_ecards_limit;
 260
 261 void snd_request_card(int card);
 262
 263 int snd_register_device(int type, snd_card_t *card, int dev, snd_minor_t *reg, const char *name);
 264 int snd_unregister_device(int type, snd_card_t *card, int dev);
 265
 266 #ifdef CONFIG_SND_OSSEMUL
 267 int snd_register_oss_device(int type, snd_card_t *card, int dev, snd_minor_t *reg, const char *name);
 268 int snd_unregister_oss_device(int type, snd_card_t *card, int dev);
 269 #endif
 270
 271 int snd_minor_info_init(void);
 272 int snd_minor_info_done(void);
 273
 274 /* sound_oss.c */
 275
 276 #ifdef CONFIG_SND_OSSEMUL
 277 int snd_minor_info_oss_init(void);
 278 int snd_minor_info_oss_done(void);
 279 int snd_oss_init_module(void);
 280 #else
 281 #define snd_minor_info_oss_init() /*NOP*/
 282 #define snd_minor_info_oss_done() /*NOP*/
 283 #define snd_oss_init_module() 0
 284 #endif
 285
 286 /* memory.c */
 287
 288 int copy_to_user_fromio(void __user *dst, const volatile void __iomem *src, size_t count);
 289 int copy_from_user_toio(volatile void __iomem *dst, const void __user *src, size_t count);
 290
 291 /* init.c */
 292
 293 extern unsigned int snd_cards_lock;
 294 extern snd_card_t *snd_cards[SNDRV_CARDS];
 295 extern rwlock_t snd_card_rwlock;
 296 #if defined(CONFIG_SND_MIXER_OSS) || defined(CONFIG_SND_MIXER_OSS_MODULE)
 297 #define SND_MIXER_OSS_NOTIFY_REGISTER   0
 298 #define SND_MIXER_OSS_NOTIFY_DISCONNECT 1
 299 #define SND_MIXER_OSS_NOTIFY_FREE       2
 300 extern int (*snd_mixer_oss_notify_callback)(snd_card_t *card, int cmd);
 301 #endif
 302
 303 snd_card_t *snd_card_new(int idx, const char *id,
 304                          struct module *module, int extra_size);
 305 int snd_card_disconnect(snd_card_t *card);
 306 int snd_card_free(snd_card_t *card);
 307 int snd_card_free_in_thread(snd_card_t *card);
 308 int snd_card_register(snd_card_t *card);
 309 int snd_card_info_init(void);
 310 int snd_card_info_done(void);
 311 int snd_component_add(snd_card_t *card, const char *component);
 312 int snd_card_file_add(snd_card_t *card, struct file *file);
 313 int snd_card_file_remove(snd_card_t *card, struct file *file);
 314
 315 #ifndef snd_card_set_dev
 316 #define snd_card_set_dev(card,devptr) ((card)->dev = (devptr))
 317 #endif
 318 /* register a generic device (for ISA, etc) */
 319 int snd_card_set_generic_dev(snd_card_t *card);
 320
 321 /* device.c */
 322
 323 int snd_device_new(snd_card_t *card, snd_device_type_t type,
 324                    void *device_data, snd_device_ops_t *ops);
 325 int snd_device_register(snd_card_t *card, void *device_data);
 326 int snd_device_register_all(snd_card_t *card);
 327 int snd_device_disconnect(snd_card_t *card, void *device_data);
 328 int snd_device_disconnect_all(snd_card_t *card);
 329 int snd_device_free(snd_card_t *card, void *device_data);
 330 int snd_device_free_all(snd_card_t *card, snd_device_cmd_t cmd);
 331
 332 /* isadma.c */
 333
 334 #ifdef CONFIG_ISA_DMA_API
 335 #define DMA_MODE_NO_ENABLE      0x0100
 336
 337 void snd_dma_program(unsigned long dma, unsigned long addr, unsigned int size, unsigned short mode);
 338 void snd_dma_disable(unsigned long dma);
 339 unsigned int snd_dma_pointer(unsigned long dma, unsigned int size);
 340 #endif
 341
 342 /* misc.c */
 343 struct resource;
 344 void release_and_free_resource(struct resource *res);
 345
 346 #ifdef CONFIG_SND_VERBOSE_PRINTK
 347 void snd_verbose_printk(const char *file, int line, const char *format, ...)
 348      __attribute__ ((format (printf, 3, 4)));
 349 #endif
 350 #if defined(CONFIG_SND_DEBUG) && defined(CONFIG_SND_VERBOSE_PRINTK)
 351 void snd_verbose_printd(const char *file, int line, const char *format, ...)
 352      __attribute__ ((format (printf, 3, 4)));
 353 #endif
 354
 355 /* --- */
 356
 357 #ifdef CONFIG_SND_VERBOSE_PRINTK
 358 /**
 359  * snd_printk - printk wrapper
 360  * @fmt: format string
 361  *
 362  * Works like print() but prints the file and the line of the caller
 363  * when configured with CONFIG_SND_VERBOSE_PRINTK.
 364  */
 365 #define snd_printk(fmt, args...) \
 366         snd_verbose_printk(__FILE__, __LINE__, fmt ,##args)
 367 #else
 368 #define snd_printk(fmt, args...) \
 369         printk(fmt ,##args)
 370 #endif
 371
 372 #ifdef CONFIG_SND_DEBUG
 373
 374 #define __ASTRING__(x) #x
 375
 376 #ifdef CONFIG_SND_VERBOSE_PRINTK
 377 /**
 378  * snd_printd - debug printk
 379  * @format: format string
 380  *
 381  * Compiled only when Works like snd_printk() for debugging purpose.
 382  * Ignored when CONFIG_SND_DEBUG is not set.
 383  */
 384 #define snd_printd(fmt, args...) \
 385         snd_verbose_printd(__FILE__, __LINE__, fmt ,##args)
 386 #else
 387 #define snd_printd(fmt, args...) \
 388         printk(fmt ,##args)
 389 #endif
 390 /**
 391  * snd_assert - run-time assertion macro
 392  * @expr: expression
 393  * @args...: the action
 394  *
 395  * This macro checks the expression in run-time and invokes the commands
 396  * given in the rest arguments if the assertion is failed.
 397  * When CONFIG_SND_DEBUG is not set, the expression is executed but
 398  * not checked.
 399  */
 400 #define snd_assert(expr, args...) do {                                  \
 401         if (unlikely(!(expr))) {                                        \
 402                 snd_printk(KERN_ERR "BUG? (%s)\n", __ASTRING__(expr));  \
 403                 dump_stack();                                           \
 404                 args;                                                   \
 405         }                                                               \
 406 } while (0)
 407
 408 #define snd_BUG() do {                          \
 409         snd_printk(KERN_ERR "BUG?\n");          \
 410         dump_stack();                           \
 411 } while (0)
 412
 413 #else /* !CONFIG_SND_DEBUG */
 414
 415 #define snd_printd(fmt, args...)        /* nothing */
 416 #define snd_assert(expr, args...)       (void)(expr)
 417 #define snd_BUG()                       /* nothing */
 418
 419 #endif /* CONFIG_SND_DEBUG */
 420
 421 #ifdef CONFIG_SND_DEBUG_DETECT
 422 /**
 423  * snd_printdd - debug printk
 424  * @format: format string
 425  *
 426  * Compiled only when Works like snd_printk() for debugging purpose.
 427  * Ignored when CONFIG_SND_DEBUG_DETECT is not set.
 428  */
 429 #define snd_printdd(format, args...) snd_printk(format, ##args)
 430 #else
 431 #define snd_printdd(format, args...) /* nothing */
 432 #endif
 433
 434
 435 #define SNDRV_OSS_VERSION         ((3<<16)|(8<<8)|(1<<4)|(0))   /* 3.8.1a */
 436
 437 /* for easier backward-porting */
 438 #if defined(CONFIG_GAMEPORT) || defined(CONFIG_GAMEPORT_MODULE)
 439 #ifndef gameport_set_dev_parent
 440 #define gameport_set_dev_parent(gp,xdev) ((gp)->dev.parent = (xdev))
 441 #define gameport_set_port_data(gp,r) ((gp)->port_data = (r))
 442 #define gameport_get_port_data(gp) (gp)->port_data
 443 #endif
 444 #endif
 445
 446 #endif /* __SOUND_CORE_H */