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 <linux/mutex.h>                /* struct mutex */
  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 /* 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         int (*dev_unregister)(struct snd_device *dev);
  75 };
  76
  77 struct snd_device {
  78         struct list_head list;          /* list of registered devices */
  79         struct snd_card *card;          /* card which holds this device */
  80         snd_device_state_t state;       /* state of the device */
  81         snd_device_type_t type;         /* device type */
  82         void *device_data;              /* device structure */
  83         struct snd_device_ops *ops;     /* operations */
  84 };
  85
  86 #define snd_device(n) list_entry(n, struct snd_device, list)
  87
  88 /* monitor files for graceful shutdown (hotplug) */
  89
  90 struct snd_monitor_file {
  91         struct file *file;
  92         struct snd_monitor_file *next;
  93 };
  94
  95 struct snd_shutdown_f_ops;      /* define it later in init.c */
  96
  97 /* main structure for soundcard */
  98
  99 struct snd_card {
 100         int number;                     /* number of soundcard (index to
 101                                                                 snd_cards) */
 102
 103         char id[16];                    /* id string of this card */
 104         char driver[16];                /* driver name */
 105         char shortname[32];             /* short name of this soundcard */
 106         char longname[80];              /* name of this soundcard */
 107         char mixername[80];             /* mixer name */
 108         char components[80];            /* card components delimited with
 109                                                                 space */
 110         struct module *module;          /* top-level module */
 111
 112         void *private_data;             /* private data for soundcard */
 113         void (*private_free) (struct snd_card *card); /* callback for freeing of
 114                                                                 private data */
 115         struct list_head devices;       /* devices */
 116
 117         unsigned int last_numid;        /* last used numeric ID */
 118         struct rw_semaphore controls_rwsem;     /* controls list lock */
 119         rwlock_t ctl_files_rwlock;      /* ctl_files list lock */
 120         int controls_count;             /* count of all controls */
 121         int user_ctl_count;             /* count of all user controls */
 122         struct list_head controls;      /* all controls for this card */
 123         struct list_head ctl_files;     /* active control files */
 124
 125         struct snd_info_entry *proc_root;       /* root for soundcard specific files */
 126         struct snd_info_entry *proc_id; /* the card id */
 127         struct proc_dir_entry *proc_root_link;  /* number link to real id */
 128
 129         struct snd_monitor_file *files; /* all files associated to this card */
 130         struct snd_shutdown_f_ops *s_f_ops; /* file operations in the shutdown
 131                                                                 state */
 132         spinlock_t files_lock;          /* lock the files for this card */
 133         int shutdown;                   /* this card is going down */
 134         wait_queue_head_t shutdown_sleep;
 135         struct work_struct free_workq;  /* for free in workqueue */
 136         struct device *dev;
 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 #ifdef CONFIG_PM
 151 static inline void snd_power_lock(struct snd_card *card)
 152 {
 153         mutex_lock(&card->power_lock);
 154 }
 155
 156 static inline void snd_power_unlock(struct snd_card *card)
 157 {
 158         mutex_unlock(&card->power_lock);
 159 }
 160
 161 static inline unsigned int snd_power_get_state(struct snd_card *card)
 162 {
 163         return card->power_state;
 164 }
 165
 166 static inline void snd_power_change_state(struct snd_card *card, unsigned int state)
 167 {
 168         card->power_state = state;
 169         wake_up(&card->power_sleep);
 170 }
 171
 172 /* init.c */
 173 int snd_power_wait(struct snd_card *card, unsigned int power_state);
 174
 175 #else /* ! CONFIG_PM */
 176
 177 #define snd_power_lock(card)            do { (void)(card); } while (0)
 178 #define snd_power_unlock(card)          do { (void)(card); } while (0)
 179 static inline int snd_power_wait(struct snd_card *card, unsigned int state) { return 0; }
 180 #define snd_power_get_state(card)       SNDRV_CTL_POWER_D0
 181 #define snd_power_change_state(card, state)     do { (void)(card); } while (0)
 182
 183 #endif /* CONFIG_PM */
 184
 185 struct snd_minor {
 186         int type;                       /* SNDRV_DEVICE_TYPE_XXX */
 187         int card;                       /* card number */
 188         int device;                     /* device number */
 189         const struct file_operations *f_ops;    /* file operations */
 190         void *private_data;             /* private data for f_ops->open */
 191 };
 192
 193 /* sound.c */
 194
 195 extern int snd_major;
 196 extern int snd_ecards_limit;
 197
 198 void snd_request_card(int card);
 199
 200 int snd_register_device(int type, struct snd_card *card, int dev,
 201                         const struct file_operations *f_ops, void *private_data,
 202                         const char *name);
 203 int snd_unregister_device(int type, struct snd_card *card, int dev);
 204 void *snd_lookup_minor_data(unsigned int minor, int type);
 205
 206 #ifdef CONFIG_SND_OSSEMUL
 207 int snd_register_oss_device(int type, struct snd_card *card, int dev,
 208                             const struct file_operations *f_ops, void *private_data,
 209                             const char *name);
 210 int snd_unregister_oss_device(int type, struct snd_card *card, int dev);
 211 void *snd_lookup_oss_minor_data(unsigned int minor, int type);
 212 #endif
 213
 214 int snd_minor_info_init(void);
 215 int snd_minor_info_done(void);
 216
 217 /* sound_oss.c */
 218
 219 #ifdef CONFIG_SND_OSSEMUL
 220 int snd_minor_info_oss_init(void);
 221 int snd_minor_info_oss_done(void);
 222 #else
 223 #define snd_minor_info_oss_init() /*NOP*/
 224 #define snd_minor_info_oss_done() /*NOP*/
 225 #endif
 226
 227 /* memory.c */
 228
 229 int copy_to_user_fromio(void __user *dst, const volatile void __iomem *src, size_t count);
 230 int copy_from_user_toio(volatile void __iomem *dst, const void __user *src, size_t count);
 231
 232 /* init.c */
 233
 234 extern struct snd_card *snd_cards[SNDRV_CARDS];
 235 int snd_card_locked(int card);
 236 #if defined(CONFIG_SND_MIXER_OSS) || defined(CONFIG_SND_MIXER_OSS_MODULE)
 237 #define SND_MIXER_OSS_NOTIFY_REGISTER   0
 238 #define SND_MIXER_OSS_NOTIFY_DISCONNECT 1
 239 #define SND_MIXER_OSS_NOTIFY_FREE       2
 240 extern int (*snd_mixer_oss_notify_callback)(struct snd_card *card, int cmd);
 241 #endif
 242
 243 struct snd_card *snd_card_new(int idx, const char *id,
 244                          struct module *module, int extra_size);
 245 int snd_card_disconnect(struct snd_card *card);
 246 int snd_card_free(struct snd_card *card);
 247 int snd_card_free_in_thread(struct snd_card *card);
 248 int snd_card_register(struct snd_card *card);
 249 int snd_card_info_init(void);
 250 int snd_card_info_done(void);
 251 int snd_component_add(struct snd_card *card, const char *component);
 252 int snd_card_file_add(struct snd_card *card, struct file *file);
 253 int snd_card_file_remove(struct snd_card *card, struct file *file);
 254
 255 #ifndef snd_card_set_dev
 256 #define snd_card_set_dev(card,devptr) ((card)->dev = (devptr))
 257 #endif
 258
 259 /* device.c */
 260
 261 int snd_device_new(struct snd_card *card, snd_device_type_t type,
 262                    void *device_data, struct snd_device_ops *ops);
 263 int snd_device_register(struct snd_card *card, void *device_data);
 264 int snd_device_register_all(struct snd_card *card);
 265 int snd_device_disconnect(struct snd_card *card, void *device_data);
 266 int snd_device_disconnect_all(struct snd_card *card);
 267 int snd_device_free(struct snd_card *card, void *device_data);
 268 int snd_device_free_all(struct snd_card *card, snd_device_cmd_t cmd);
 269
 270 /* isadma.c */
 271
 272 #ifdef CONFIG_ISA_DMA_API
 273 #define DMA_MODE_NO_ENABLE      0x0100
 274
 275 void snd_dma_program(unsigned long dma, unsigned long addr, unsigned int size, unsigned short mode);
 276 void snd_dma_disable(unsigned long dma);
 277 unsigned int snd_dma_pointer(unsigned long dma, unsigned int size);
 278 #endif
 279
 280 /* misc.c */
 281 struct resource;
 282 void release_and_free_resource(struct resource *res);
 283
 284 #ifdef CONFIG_SND_VERBOSE_PRINTK
 285 void snd_verbose_printk(const char *file, int line, const char *format, ...)
 286      __attribute__ ((format (printf, 3, 4)));
 287 #endif
 288 #if defined(CONFIG_SND_DEBUG) && defined(CONFIG_SND_VERBOSE_PRINTK)
 289 void snd_verbose_printd(const char *file, int line, const char *format, ...)
 290      __attribute__ ((format (printf, 3, 4)));
 291 #endif
 292
 293 /* --- */
 294
 295 #ifdef CONFIG_SND_VERBOSE_PRINTK
 296 /**
 297  * snd_printk - printk wrapper
 298  * @fmt: format string
 299  *
 300  * Works like print() but prints the file and the line of the caller
 301  * when configured with CONFIG_SND_VERBOSE_PRINTK.
 302  */
 303 #define snd_printk(fmt, args...) \
 304         snd_verbose_printk(__FILE__, __LINE__, fmt ,##args)
 305 #else
 306 #define snd_printk(fmt, args...) \
 307         printk(fmt ,##args)
 308 #endif
 309
 310 #ifdef CONFIG_SND_DEBUG
 311
 312 #define __ASTRING__(x) #x
 313
 314 #ifdef CONFIG_SND_VERBOSE_PRINTK
 315 /**
 316  * snd_printd - debug printk
 317  * @fmt: format string
 318  *
 319  * Compiled only when Works like snd_printk() for debugging purpose.
 320  * Ignored when CONFIG_SND_DEBUG is not set.
 321  */
 322 #define snd_printd(fmt, args...) \
 323         snd_verbose_printd(__FILE__, __LINE__, fmt ,##args)
 324 #else
 325 #define snd_printd(fmt, args...) \
 326         printk(fmt ,##args)
 327 #endif
 328 /**
 329  * snd_assert - run-time assertion macro
 330  * @expr: expression
 331  *
 332  * This macro checks the expression in run-time and invokes the commands
 333  * given in the rest arguments if the assertion is failed.
 334  * When CONFIG_SND_DEBUG is not set, the expression is executed but
 335  * not checked.
 336  */
 337 #define snd_assert(expr, args...) do {                                  \
 338         if (unlikely(!(expr))) {                                        \
 339                 snd_printk(KERN_ERR "BUG? (%s)\n", __ASTRING__(expr));  \
 340                 dump_stack();                                           \
 341                 args;                                                   \
 342         }                                                               \
 343 } while (0)
 344
 345 #define snd_BUG() do {                          \
 346         snd_printk(KERN_ERR "BUG?\n");          \
 347         dump_stack();                           \
 348 } while (0)
 349
 350 #else /* !CONFIG_SND_DEBUG */
 351
 352 #define snd_printd(fmt, args...)        /* nothing */
 353 #define snd_assert(expr, args...)       (void)(expr)
 354 #define snd_BUG()                       /* nothing */
 355
 356 #endif /* CONFIG_SND_DEBUG */
 357
 358 #ifdef CONFIG_SND_DEBUG_DETECT
 359 /**
 360  * snd_printdd - debug printk
 361  * @format: format string
 362  *
 363  * Compiled only when Works like snd_printk() for debugging purpose.
 364  * Ignored when CONFIG_SND_DEBUG_DETECT is not set.
 365  */
 366 #define snd_printdd(format, args...) snd_printk(format, ##args)
 367 #else
 368 #define snd_printdd(format, args...) /* nothing */
 369 #endif
 370
 371
 372 #define SNDRV_OSS_VERSION         ((3<<16)|(8<<8)|(1<<4)|(0))   /* 3.8.1a */
 373
 374 /* for easier backward-porting */
 375 #if defined(CONFIG_GAMEPORT) || defined(CONFIG_GAMEPORT_MODULE)
 376 #ifndef gameport_set_dev_parent
 377 #define gameport_set_dev_parent(gp,xdev) ((gp)->dev.parent = (xdev))
 378 #define gameport_set_port_data(gp,r) ((gp)->port_data = (r))
 379 #define gameport_get_port_data(gp) (gp)->port_data
 380 #endif
 381 #endif
 382
 383 #include "typedefs.h"
 384
 385 #endif /* __SOUND_CORE_H */