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/device.h>
  26 #include <linux/sched.h>                /* wake_up() */
  27 #include <linux/mutex.h>                /* struct mutex */
  28 #include <linux/rwsem.h>                /* struct rw_semaphore */
  29 #include <linux/pm.h>                   /* pm_message_t */
  30 #include <linux/stringify.h>
  31 #include <linux/printk.h>
  32
  33 /* number of supported soundcards */
  34 #ifdef CONFIG_SND_DYNAMIC_MINORS
  35 #define SNDRV_CARDS CONFIG_SND_MAX_CARDS
  36 #else
  37 #define SNDRV_CARDS 8           /* don't change - minor numbers */
  38 #endif
  39
  40 #define CONFIG_SND_MAJOR        116     /* standard configuration */
  41
  42 /* forward declarations */
  43 struct pci_dev;
  44 struct module;
  45 struct completion;
  46
  47 /* device allocation stuff */
  48
  49 /* type of the object used in snd_device_*()
  50  * this also defines the calling order
  51  */
  52 enum snd_device_type {
  53         SNDRV_DEV_LOWLEVEL,
  54         SNDRV_DEV_CONTROL,
  55         SNDRV_DEV_INFO,
  56         SNDRV_DEV_BUS,
  57         SNDRV_DEV_CODEC,
  58         SNDRV_DEV_PCM,
  59         SNDRV_DEV_COMPRESS,
  60         SNDRV_DEV_RAWMIDI,
  61         SNDRV_DEV_TIMER,
  62         SNDRV_DEV_SEQUENCER,
  63         SNDRV_DEV_HWDEP,
  64         SNDRV_DEV_JACK,
  65 };
  66
  67 enum snd_device_state {
  68         SNDRV_DEV_BUILD,
  69         SNDRV_DEV_REGISTERED,
  70         SNDRV_DEV_DISCONNECTED,
  71 };
  72
  73 struct snd_device;
  74
  75 struct snd_device_ops {
  76         int (*dev_free)(struct snd_device *dev);
  77         int (*dev_register)(struct snd_device *dev);
  78         int (*dev_disconnect)(struct snd_device *dev);
  79 };
  80
  81 struct snd_device {
  82         struct list_head list;          /* list of registered devices */
  83         struct snd_card *card;          /* card which holds this device */
  84         enum snd_device_state state;    /* state of the device */
  85         enum snd_device_type type;      /* device type */
  86         void *device_data;              /* device structure */
  87         struct snd_device_ops *ops;     /* operations */
  88 };
  89
  90 #define snd_device(n) list_entry(n, struct snd_device, list)
  91
  92 /* main structure for soundcard */
  93
  94 struct snd_card {
  95         int number;                     /* number of soundcard (index to
  96                                                                 snd_cards) */
  97
  98         char id[16];                    /* id string of this card */
  99         char driver[16];                /* driver name */
 100         char shortname[32];             /* short name of this soundcard */
 101         char longname[80];              /* name of this soundcard */
 102         char mixername[80];             /* mixer name */
 103         char components[128];           /* card components delimited with
 104                                                                 space */
 105         struct module *module;          /* top-level module */
 106
 107         void *private_data;             /* private data for soundcard */
 108         void (*private_free) (struct snd_card *card); /* callback for freeing of
 109                                                                 private data */
 110         struct list_head devices;       /* devices */
 111
 112         struct device ctl_dev;          /* control device */
 113         unsigned int last_numid;        /* last used numeric ID */
 114         struct rw_semaphore controls_rwsem;     /* controls list lock */
 115         rwlock_t ctl_files_rwlock;      /* ctl_files list lock */
 116         int controls_count;             /* count of all controls */
 117         int user_ctl_count;             /* count of all user controls */
 118         struct list_head controls;      /* all controls for this card */
 119         struct list_head ctl_files;     /* active control files */
 120         struct mutex user_ctl_lock;     /* protects user controls against
 121                                            concurrent access */
 122
 123         struct snd_info_entry *proc_root;       /* root for soundcard specific files */
 124         struct snd_info_entry *proc_id; /* the card id */
 125         struct proc_dir_entry *proc_root_link;  /* number link to real id */
 126
 127         struct list_head files_list;    /* all files associated to this card */
 128         struct snd_shutdown_f_ops *s_f_ops; /* file operations in the shutdown
 129                                                                 state */
 130         spinlock_t files_lock;          /* lock the files for this card */
 131         int shutdown;                   /* this card is going down */
 132         struct completion *release_completion;
 133         struct device *dev;             /* device assigned to this card */
 134         struct device card_dev;         /* cardX object for sysfs */
 135         const struct attribute_group *dev_groups[4]; /* assigned sysfs attr */
 136         bool registered;                /* card_dev is registered? */
 137
 138 #ifdef CONFIG_PM
 139         unsigned int power_state;       /* power state */
 140         struct mutex power_lock;        /* power lock */
 141         wait_queue_head_t power_sleep;
 142 #endif
 143
 144 #if defined(CONFIG_SND_MIXER_OSS) || defined(CONFIG_SND_MIXER_OSS_MODULE)
 145         struct snd_mixer_oss *mixer_oss;
 146         int mixer_oss_change_count;
 147 #endif
 148 };
 149
 150 #define dev_to_snd_card(p)      container_of(p, struct snd_card, card_dev)
 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)       ({ (void)(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         struct snd_card *card_ptr;      /* assigned card instance */
 195 };
 196
 197 /* return a device pointer linked to each sound device as a parent */
 198 static inline struct device *snd_card_get_device_link(struct snd_card *card)
 199 {
 200         return card ? &card->card_dev : NULL;
 201 }
 202
 203 /* sound.c */
 204
 205 extern int snd_major;
 206 extern int snd_ecards_limit;
 207 extern struct class *sound_class;
 208
 209 void snd_request_card(int card);
 210
 211 void snd_device_initialize(struct device *dev, struct snd_card *card);
 212
 213 int snd_register_device(int type, struct snd_card *card, int dev,
 214                         const struct file_operations *f_ops,
 215                         void *private_data, struct device *device);
 216 int snd_unregister_device(struct device *dev);
 217 void *snd_lookup_minor_data(unsigned int minor, int type);
 218
 219 #ifdef CONFIG_SND_OSSEMUL
 220 int snd_register_oss_device(int type, struct snd_card *card, int dev,
 221                             const struct file_operations *f_ops, void *private_data);
 222 int snd_unregister_oss_device(int type, struct snd_card *card, int dev);
 223 void *snd_lookup_oss_minor_data(unsigned int minor, int type);
 224 #endif
 225
 226 int snd_minor_info_init(void);
 227
 228 /* sound_oss.c */
 229
 230 #ifdef CONFIG_SND_OSSEMUL
 231 int snd_minor_info_oss_init(void);
 232 #else
 233 static inline int snd_minor_info_oss_init(void) { return 0; }
 234 #endif
 235
 236 /* memory.c */
 237
 238 int copy_to_user_fromio(void __user *dst, const volatile void __iomem *src, size_t count);
 239 int copy_from_user_toio(volatile void __iomem *dst, const void __user *src, size_t count);
 240
 241 /* init.c */
 242
 243 extern struct snd_card *snd_cards[SNDRV_CARDS];
 244 int snd_card_locked(int card);
 245 #if defined(CONFIG_SND_MIXER_OSS) || defined(CONFIG_SND_MIXER_OSS_MODULE)
 246 #define SND_MIXER_OSS_NOTIFY_REGISTER   0
 247 #define SND_MIXER_OSS_NOTIFY_DISCONNECT 1
 248 #define SND_MIXER_OSS_NOTIFY_FREE       2
 249 extern int (*snd_mixer_oss_notify_callback)(struct snd_card *card, int cmd);
 250 #endif
 251
 252 int snd_card_new(struct device *parent, int idx, const char *xid,
 253                  struct module *module, int extra_size,
 254                  struct snd_card **card_ret);
 255
 256 int snd_card_disconnect(struct snd_card *card);
 257 int snd_card_free(struct snd_card *card);
 258 int snd_card_free_when_closed(struct snd_card *card);
 259 void snd_card_set_id(struct snd_card *card, const char *id);
 260 int snd_card_register(struct snd_card *card);
 261 int snd_card_info_init(void);
 262 int snd_card_add_dev_attr(struct snd_card *card,
 263                           const struct attribute_group *group);
 264 int snd_component_add(struct snd_card *card, const char *component);
 265 int snd_card_file_add(struct snd_card *card, struct file *file);
 266 int snd_card_file_remove(struct snd_card *card, struct file *file);
 267 #define snd_card_unref(card)    put_device(&(card)->card_dev)
 268
 269 #define snd_card_set_dev(card, devptr) ((card)->dev = (devptr))
 270
 271 /* device.c */
 272
 273 int snd_device_new(struct snd_card *card, enum snd_device_type type,
 274                    void *device_data, struct snd_device_ops *ops);
 275 int snd_device_register(struct snd_card *card, void *device_data);
 276 int snd_device_register_all(struct snd_card *card);
 277 void snd_device_disconnect(struct snd_card *card, void *device_data);
 278 void snd_device_disconnect_all(struct snd_card *card);
 279 void snd_device_free(struct snd_card *card, void *device_data);
 280 void snd_device_free_all(struct snd_card *card);
 281
 282 /* isadma.c */
 283
 284 #ifdef CONFIG_ISA_DMA_API
 285 #define DMA_MODE_NO_ENABLE      0x0100
 286
 287 void snd_dma_program(unsigned long dma, unsigned long addr, unsigned int size, unsigned short mode);
 288 void snd_dma_disable(unsigned long dma);
 289 unsigned int snd_dma_pointer(unsigned long dma, unsigned int size);
 290 #endif
 291
 292 /* misc.c */
 293 struct resource;
 294 void release_and_free_resource(struct resource *res);
 295
 296 /* --- */
 297
 298 /* sound printk debug levels */
 299 enum {
 300         SND_PR_ALWAYS,
 301         SND_PR_DEBUG,
 302         SND_PR_VERBOSE,
 303 };
 304
 305 #if defined(CONFIG_SND_DEBUG) || defined(CONFIG_SND_VERBOSE_PRINTK)
 306 __printf(4, 5)
 307 void __snd_printk(unsigned int level, const char *file, int line,
 308                   const char *format, ...);
 309 #else
 310 #define __snd_printk(level, file, line, format, args...) \
 311         printk(format, ##args)
 312 #endif
 313
 314 /**
 315  * snd_printk - printk wrapper
 316  * @fmt: format string
 317  *
 318  * Works like printk() but prints the file and the line of the caller
 319  * when configured with CONFIG_SND_VERBOSE_PRINTK.
 320  */
 321 #define snd_printk(fmt, args...) \
 322         __snd_printk(0, __FILE__, __LINE__, fmt, ##args)
 323
 324 #ifdef CONFIG_SND_DEBUG
 325 /**
 326  * snd_printd - debug printk
 327  * @fmt: format string
 328  *
 329  * Works like snd_printk() for debugging purposes.
 330  * Ignored when CONFIG_SND_DEBUG is not set.
 331  */
 332 #define snd_printd(fmt, args...) \
 333         __snd_printk(1, __FILE__, __LINE__, fmt, ##args)
 334 #define _snd_printd(level, fmt, args...) \
 335         __snd_printk(level, __FILE__, __LINE__, fmt, ##args)
 336
 337 /**
 338  * snd_BUG - give a BUG warning message and stack trace
 339  *
 340  * Calls WARN() if CONFIG_SND_DEBUG is set.
 341  * Ignored when CONFIG_SND_DEBUG is not set.
 342  */
 343 #define snd_BUG()               WARN(1, "BUG?\n")
 344
 345 /**
 346  * Suppress high rates of output when CONFIG_SND_DEBUG is enabled.
 347  */
 348 #define snd_printd_ratelimit() printk_ratelimit()
 349
 350 /**
 351  * snd_BUG_ON - debugging check macro
 352  * @cond: condition to evaluate
 353  *
 354  * Has the same behavior as WARN_ON when CONFIG_SND_DEBUG is set,
 355  * otherwise just evaluates the conditional and returns the value.
 356  */
 357 #define snd_BUG_ON(cond)        WARN_ON((cond))
 358
 359 #else /* !CONFIG_SND_DEBUG */
 360
 361 __printf(1, 2)
 362 static inline void snd_printd(const char *format, ...) {}
 363 __printf(2, 3)
 364 static inline void _snd_printd(int level, const char *format, ...) {}
 365
 366 #define snd_BUG()                       do { } while (0)
 367
 368 #define snd_BUG_ON(condition) ({ \
 369         int __ret_warn_on = !!(condition); \
 370         unlikely(__ret_warn_on); \
 371 })
 372
 373 static inline bool snd_printd_ratelimit(void) { return false; }
 374
 375 #endif /* CONFIG_SND_DEBUG */
 376
 377 #ifdef CONFIG_SND_DEBUG_VERBOSE
 378 /**
 379  * snd_printdd - debug printk
 380  * @format: format string
 381  *
 382  * Works like snd_printk() for debugging purposes.
 383  * Ignored when CONFIG_SND_DEBUG_VERBOSE is not set.
 384  */
 385 #define snd_printdd(format, args...) \
 386         __snd_printk(2, __FILE__, __LINE__, format, ##args)
 387 #else
 388 __printf(1, 2)
 389 static inline void snd_printdd(const char *format, ...) {}
 390 #endif
 391
 392
 393 #define SNDRV_OSS_VERSION         ((3<<16)|(8<<8)|(1<<4)|(0))   /* 3.8.1a */
 394
 395 /* for easier backward-porting */
 396 #if defined(CONFIG_GAMEPORT) || defined(CONFIG_GAMEPORT_MODULE)
 397 #define gameport_set_dev_parent(gp,xdev) ((gp)->dev.parent = (xdev))
 398 #define gameport_set_port_data(gp,r) ((gp)->port_data = (r))
 399 #define gameport_get_port_data(gp) (gp)->port_data
 400 #endif
 401
 402 /* PCI quirk list helper */
 403 struct snd_pci_quirk {
 404         unsigned short subvendor;       /* PCI subvendor ID */
 405         unsigned short subdevice;       /* PCI subdevice ID */
 406         unsigned short subdevice_mask;  /* bitmask to match */
 407         int value;                      /* value */
 408 #ifdef CONFIG_SND_DEBUG_VERBOSE
 409         const char *name;               /* name of the device (optional) */
 410 #endif
 411 };
 412
 413 #define _SND_PCI_QUIRK_ID_MASK(vend, mask, dev) \
 414         .subvendor = (vend), .subdevice = (dev), .subdevice_mask = (mask)
 415 #define _SND_PCI_QUIRK_ID(vend, dev) \
 416         _SND_PCI_QUIRK_ID_MASK(vend, 0xffff, dev)
 417 #define SND_PCI_QUIRK_ID(vend,dev) {_SND_PCI_QUIRK_ID(vend, dev)}
 418 #ifdef CONFIG_SND_DEBUG_VERBOSE
 419 #define SND_PCI_QUIRK(vend,dev,xname,val) \
 420         {_SND_PCI_QUIRK_ID(vend, dev), .value = (val), .name = (xname)}
 421 #define SND_PCI_QUIRK_VENDOR(vend, xname, val)                  \
 422         {_SND_PCI_QUIRK_ID_MASK(vend, 0, 0), .value = (val), .name = (xname)}
 423 #define SND_PCI_QUIRK_MASK(vend, mask, dev, xname, val)                 \
 424         {_SND_PCI_QUIRK_ID_MASK(vend, mask, dev),                       \
 425                         .value = (val), .name = (xname)}
 426 #define snd_pci_quirk_name(q)   ((q)->name)
 427 #else
 428 #define SND_PCI_QUIRK(vend,dev,xname,val) \
 429         {_SND_PCI_QUIRK_ID(vend, dev), .value = (val)}
 430 #define SND_PCI_QUIRK_MASK(vend, mask, dev, xname, val)                 \
 431         {_SND_PCI_QUIRK_ID_MASK(vend, mask, dev), .value = (val)}
 432 #define SND_PCI_QUIRK_VENDOR(vend, xname, val)                  \
 433         {_SND_PCI_QUIRK_ID_MASK(vend, 0, 0), .value = (val)}
 434 #define snd_pci_quirk_name(q)   ""
 435 #endif
 436
 437 #ifdef CONFIG_PCI
 438 const struct snd_pci_quirk *
 439 snd_pci_quirk_lookup(struct pci_dev *pci, const struct snd_pci_quirk *list);
 440
 441 const struct snd_pci_quirk *
 442 snd_pci_quirk_lookup_id(u16 vendor, u16 device,
 443                         const struct snd_pci_quirk *list);
 444 #else
 445 static inline const struct snd_pci_quirk *
 446 snd_pci_quirk_lookup(struct pci_dev *pci, const struct snd_pci_quirk *list)
 447 {
 448         return NULL;
 449 }
 450
 451 static inline const struct snd_pci_quirk *
 452 snd_pci_quirk_lookup_id(u16 vendor, u16 device,
 453                         const struct snd_pci_quirk *list)
 454 {
 455         return NULL;
 456 }
 457 #endif
 458
 459 #endif /* __SOUND_CORE_H */