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/module.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/device.h>
  31 #include <linux/stringify.h>
  32
  33 /* number of supported soundcards */
  34 #ifdef CONFIG_SND_DYNAMIC_MINORS
  35 #define SNDRV_CARDS 32
  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 #ifdef CONFIG_PCI
  44 struct pci_dev;
  45 #endif
  46
  47 /* device allocation stuff */
  48
  49 #define SNDRV_DEV_TYPE_RANGE_SIZE               0x1000
  50
  51 typedef int __bitwise snd_device_type_t;
  52 #define SNDRV_DEV_TOPLEVEL      ((__force snd_device_type_t) 0)
  53 #define SNDRV_DEV_CONTROL       ((__force snd_device_type_t) 1)
  54 #define SNDRV_DEV_LOWLEVEL_PRE  ((__force snd_device_type_t) 2)
  55 #define SNDRV_DEV_LOWLEVEL_NORMAL ((__force snd_device_type_t) 0x1000)
  56 #define SNDRV_DEV_PCM           ((__force snd_device_type_t) 0x1001)
  57 #define SNDRV_DEV_RAWMIDI       ((__force snd_device_type_t) 0x1002)
  58 #define SNDRV_DEV_TIMER         ((__force snd_device_type_t) 0x1003)
  59 #define SNDRV_DEV_SEQUENCER     ((__force snd_device_type_t) 0x1004)
  60 #define SNDRV_DEV_HWDEP         ((__force snd_device_type_t) 0x1005)
  61 #define SNDRV_DEV_INFO          ((__force snd_device_type_t) 0x1006)
  62 #define SNDRV_DEV_BUS           ((__force snd_device_type_t) 0x1007)
  63 #define SNDRV_DEV_CODEC         ((__force snd_device_type_t) 0x1008)
  64 #define SNDRV_DEV_JACK          ((__force snd_device_type_t) 0x1009)
  65 #define SNDRV_DEV_LOWLEVEL      ((__force snd_device_type_t) 0x2000)
  66
  67 typedef int __bitwise snd_device_state_t;
  68 #define SNDRV_DEV_BUILD         ((__force snd_device_state_t) 0)
  69 #define SNDRV_DEV_REGISTERED    ((__force snd_device_state_t) 1)
  70 #define SNDRV_DEV_DISCONNECTED  ((__force snd_device_state_t) 2)
  71
  72 typedef int __bitwise snd_device_cmd_t;
  73 #define SNDRV_DEV_CMD_PRE       ((__force snd_device_cmd_t) 0)
  74 #define SNDRV_DEV_CMD_NORMAL    ((__force snd_device_cmd_t) 1)
  75 #define SNDRV_DEV_CMD_POST      ((__force snd_device_cmd_t) 2)
  76
  77 struct snd_device;
  78
  79 struct snd_device_ops {
  80         int (*dev_free)(struct snd_device *dev);
  81         int (*dev_register)(struct snd_device *dev);
  82         int (*dev_disconnect)(struct snd_device *dev);
  83 };
  84
  85 struct snd_device {
  86         struct list_head list;          /* list of registered devices */
  87         struct snd_card *card;          /* card which holds this device */
  88         snd_device_state_t state;       /* state of the device */
  89         snd_device_type_t type;         /* device type */
  90         void *device_data;              /* device structure */
  91         struct snd_device_ops *ops;     /* operations */
  92 };
  93
  94 #define snd_device(n) list_entry(n, struct snd_device, list)
  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[128];           /* 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 list_head files_list;    /* 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 static inline int snd_minor_info_oss_init(void) { return 0; }
 271 static inline int snd_minor_info_oss_done(void) { return 0; }
 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 int snd_card_create(int idx, const char *id,
 291                     struct module *module, int extra_size,
 292                     struct snd_card **card_ret);
 293
 294 int snd_card_disconnect(struct snd_card *card);
 295 int snd_card_free(struct snd_card *card);
 296 int snd_card_free_when_closed(struct snd_card *card);
 297 void snd_card_set_id(struct snd_card *card, const char *id);
 298 int snd_card_register(struct snd_card *card);
 299 int snd_card_info_init(void);
 300 int snd_card_info_done(void);
 301 int snd_component_add(struct snd_card *card, const char *component);
 302 int snd_card_file_add(struct snd_card *card, struct file *file);
 303 int snd_card_file_remove(struct snd_card *card, struct file *file);
 304
 305 #define snd_card_set_dev(card, devptr) ((card)->dev = (devptr))
 306
 307 /* device.c */
 308
 309 int snd_device_new(struct snd_card *card, snd_device_type_t type,
 310                    void *device_data, struct snd_device_ops *ops);
 311 int snd_device_register(struct snd_card *card, void *device_data);
 312 int snd_device_register_all(struct snd_card *card);
 313 int snd_device_disconnect(struct snd_card *card, void *device_data);
 314 int snd_device_disconnect_all(struct snd_card *card);
 315 int snd_device_free(struct snd_card *card, void *device_data);
 316 int snd_device_free_all(struct snd_card *card, snd_device_cmd_t cmd);
 317
 318 /* isadma.c */
 319
 320 #ifdef CONFIG_ISA_DMA_API
 321 #define DMA_MODE_NO_ENABLE      0x0100
 322
 323 void snd_dma_program(unsigned long dma, unsigned long addr, unsigned int size, unsigned short mode);
 324 void snd_dma_disable(unsigned long dma);
 325 unsigned int snd_dma_pointer(unsigned long dma, unsigned int size);
 326 #endif
 327
 328 /* misc.c */
 329 struct resource;
 330 void release_and_free_resource(struct resource *res);
 331
 332 /* --- */
 333
 334 #if defined(CONFIG_SND_DEBUG) || defined(CONFIG_SND_VERBOSE_PRINTK)
 335 void __snd_printk(unsigned int level, const char *file, int line,
 336                   const char *format, ...)
 337      __attribute__ ((format (printf, 4, 5)));
 338 #else
 339 #define __snd_printk(level, file, line, format, args...) \
 340         printk(format, ##args)
 341 #endif
 342
 343 /**
 344  * snd_printk - printk wrapper
 345  * @fmt: format string
 346  *
 347  * Works like printk() 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_printk(0, __FILE__, __LINE__, fmt, ##args)
 352
 353 #ifdef CONFIG_SND_DEBUG
 354 /**
 355  * snd_printd - debug printk
 356  * @fmt: format string
 357  *
 358  * Works like snd_printk() for debugging purposes.
 359  * Ignored when CONFIG_SND_DEBUG is not set.
 360  */
 361 #define snd_printd(fmt, args...) \
 362         __snd_printk(1, __FILE__, __LINE__, fmt, ##args)
 363
 364 /**
 365  * snd_BUG - give a BUG warning message and stack trace
 366  *
 367  * Calls WARN() if CONFIG_SND_DEBUG is set.
 368  * Ignored when CONFIG_SND_DEBUG is not set.
 369  */
 370 #define snd_BUG()               WARN(1, "BUG?\n")
 371
 372 /**
 373  * snd_BUG_ON - debugging check macro
 374  * @cond: condition to evaluate
 375  *
 376  * When CONFIG_SND_DEBUG is set, this macro evaluates the given condition,
 377  * and call WARN() and returns the value if it's non-zero.
 378  *
 379  * When CONFIG_SND_DEBUG is not set, this just returns zero, and the given
 380  * condition is ignored.
 381  *
 382  * NOTE: the argument won't be evaluated at all when CONFIG_SND_DEBUG=n.
 383  * Thus, don't put any statement that influences on the code behavior,
 384  * such as pre/post increment, to the argument of this macro.
 385  * If you want to evaluate and give a warning, use standard WARN_ON().
 386  */
 387 #define snd_BUG_ON(cond)        WARN((cond), "BUG? (%s)\n", __stringify(cond))
 388
 389 #else /* !CONFIG_SND_DEBUG */
 390
 391 #define snd_printd(fmt, args...)        do { } while (0)
 392 #define snd_BUG()                       do { } while (0)
 393 static inline int __snd_bug_on(int cond)
 394 {
 395         return 0;
 396 }
 397 #define snd_BUG_ON(cond)        __snd_bug_on(0 && (cond))  /* always false */
 398
 399 #endif /* CONFIG_SND_DEBUG */
 400
 401 #ifdef CONFIG_SND_DEBUG_VERBOSE
 402 /**
 403  * snd_printdd - debug printk
 404  * @format: format string
 405  *
 406  * Works like snd_printk() for debugging purposes.
 407  * Ignored when CONFIG_SND_DEBUG_VERBOSE is not set.
 408  */
 409 #define snd_printdd(format, args...) \
 410         __snd_printk(2, __FILE__, __LINE__, format, ##args)
 411 #else
 412 #define snd_printdd(format, args...)    do { } while (0)
 413 #endif
 414
 415
 416 #define SNDRV_OSS_VERSION         ((3<<16)|(8<<8)|(1<<4)|(0))   /* 3.8.1a */
 417
 418 /* for easier backward-porting */
 419 #if defined(CONFIG_GAMEPORT) || defined(CONFIG_GAMEPORT_MODULE)
 420 #define gameport_set_dev_parent(gp,xdev) ((gp)->dev.parent = (xdev))
 421 #define gameport_set_port_data(gp,r) ((gp)->port_data = (r))
 422 #define gameport_get_port_data(gp) (gp)->port_data
 423 #endif
 424
 425 /* PCI quirk list helper */
 426 struct snd_pci_quirk {
 427         unsigned short subvendor;       /* PCI subvendor ID */
 428         unsigned short subdevice;       /* PCI subdevice ID */
 429         unsigned short subdevice_mask;  /* bitmask to match */
 430         int value;                      /* value */
 431 #ifdef CONFIG_SND_DEBUG_VERBOSE
 432         const char *name;               /* name of the device (optional) */
 433 #endif
 434 };
 435
 436 #define _SND_PCI_QUIRK_ID_MASK(vend, mask, dev) \
 437         .subvendor = (vend), .subdevice = (dev), .subdevice_mask = (mask)
 438 #define _SND_PCI_QUIRK_ID(vend, dev) \
 439         _SND_PCI_QUIRK_ID_MASK(vend, 0xffff, dev)
 440 #define SND_PCI_QUIRK_ID(vend,dev) {_SND_PCI_QUIRK_ID(vend, dev)}
 441 #ifdef CONFIG_SND_DEBUG_VERBOSE
 442 #define SND_PCI_QUIRK(vend,dev,xname,val) \
 443         {_SND_PCI_QUIRK_ID(vend, dev), .value = (val), .name = (xname)}
 444 #define SND_PCI_QUIRK_VENDOR(vend, xname, val)                  \
 445         {_SND_PCI_QUIRK_ID_MASK(vend, 0, 0), .value = (val), .name = (xname)}
 446 #define SND_PCI_QUIRK_MASK(vend, mask, dev, xname, val)                 \
 447         {_SND_PCI_QUIRK_ID_MASK(vend, mask, dev),                       \
 448                         .value = (val), .name = (xname)}
 449 #else
 450 #define SND_PCI_QUIRK(vend,dev,xname,val) \
 451         {_SND_PCI_QUIRK_ID(vend, dev), .value = (val)}
 452 #define SND_PCI_QUIRK_MASK(vend, mask, dev, xname, val)                 \
 453         {_SND_PCI_QUIRK_ID_MASK(vend, mask, dev), .value = (val)}
 454 #define SND_PCI_QUIRK_VENDOR(vend, xname, val)                  \
 455         {_SND_PCI_QUIRK_ID_MASK(vend, 0, 0), .value = (val)}
 456 #endif
 457
 458 const struct snd_pci_quirk *
 459 snd_pci_quirk_lookup(struct pci_dev *pci, const struct snd_pci_quirk *list);
 460
 461
 462 #endif /* __SOUND_CORE_H */