fs: use kmem_cache_zalloc instead
[pv_ops_mirror.git] / include / sound / core.h
blob6954836487ed3407e217a3d005057ee77a8ad7c1
1 #ifndef __SOUND_CORE_H
2 #define __SOUND_CORE_H
4 /*
5 * Main header file for the ALSA driver
6 * Copyright (c) 1994-2001 by Jaroslav Kysela <perex@perex.cz>
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.
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.
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
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>
31 /* forward declarations */
32 #ifdef CONFIG_PCI
33 struct pci_dev;
34 #endif
35 #ifdef CONFIG_SBUS
36 struct sbus_dev;
37 #endif
39 /* device allocation stuff */
41 #define SNDRV_DEV_TYPE_RANGE_SIZE 0x1000
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)
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)
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)
68 struct snd_device;
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);
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 */
85 #define snd_device(n) list_entry(n, struct snd_device, list)
87 /* monitor files for graceful shutdown (hotplug) */
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;
96 /* main structure for soundcard */
98 struct snd_card {
99 int number; /* number of soundcard (index to
100 snd_cards) */
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 */
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 */
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 */
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 */
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
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
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
152 #ifdef CONFIG_PM
153 static inline void snd_power_lock(struct snd_card *card)
155 mutex_lock(&card->power_lock);
158 static inline void snd_power_unlock(struct snd_card *card)
160 mutex_unlock(&card->power_lock);
163 static inline unsigned int snd_power_get_state(struct snd_card *card)
165 return card->power_state;
168 static inline void snd_power_change_state(struct snd_card *card, unsigned int state)
170 card->power_state = state;
171 wake_up(&card->power_sleep);
174 /* init.c */
175 int snd_power_wait(struct snd_card *card, unsigned int power_state);
177 #else /* ! CONFIG_PM */
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)
185 #endif /* CONFIG_PM */
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 */
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)
199 #ifdef CONFIG_SYSFS_DEPRECATED
200 return card ? card->dev : NULL;
201 #else
202 return card ? card->card_dev : NULL;
203 #endif
206 /* sound.c */
208 extern int snd_major;
209 extern int snd_ecards_limit;
210 extern struct class *sound_class;
212 void snd_request_card(int card);
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);
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
230 * Registers an ALSA device file for the given card.
231 * The operators have to be set in reg parameter.
233 * This function uses the card's device pointer to link to the
234 * correct &struct device.
236 * Returns zero if successful, or a negative error code on failure.
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)
243 return snd_register_device_for_dev(type, card, dev, f_ops,
244 private_data, name,
245 snd_card_get_device_link(card));
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);
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
261 int snd_minor_info_init(void);
262 int snd_minor_info_done(void);
264 /* sound_oss.c */
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
274 /* memory.c */
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);
279 /* init.c */
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
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);
302 #ifndef snd_card_set_dev
303 #define snd_card_set_dev(card,devptr) ((card)->dev = (devptr))
304 #endif
306 /* device.c */
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);
317 /* isadma.c */
319 #ifdef CONFIG_ISA_DMA_API
320 #define DMA_MODE_NO_ENABLE 0x0100
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
327 /* misc.c */
328 struct resource;
329 void release_and_free_resource(struct resource *res);
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
340 /* --- */
342 #ifdef CONFIG_SND_VERBOSE_PRINTK
344 * snd_printk - printk wrapper
345 * @fmt: format string
347 * Works like print() but prints the file and the line of the caller
348 * when configured with CONFIG_SND_VERBOSE_PRINTK.
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
357 #ifdef CONFIG_SND_DEBUG
359 #define __ASTRING__(x) #x
361 #ifdef CONFIG_SND_VERBOSE_PRINTK
363 * snd_printd - debug printk
364 * @fmt: format string
366 * Compiled only when Works like snd_printk() for debugging purpose.
367 * Ignored when CONFIG_SND_DEBUG is not set.
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
376 * snd_assert - run-time assertion macro
377 * @expr: expression
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.
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; \
390 } while (0)
392 #define snd_BUG() do { \
393 snd_printk(KERN_ERR "BUG?\n"); \
394 dump_stack(); \
395 } while (0)
397 #else /* !CONFIG_SND_DEBUG */
399 #define snd_printd(fmt, args...) /* nothing */
400 #define snd_assert(expr, args...) (void)(expr)
401 #define snd_BUG() /* nothing */
403 #endif /* CONFIG_SND_DEBUG */
405 #ifdef CONFIG_SND_DEBUG_DETECT
407 * snd_printdd - debug printk
408 * @format: format string
410 * Compiled only when Works like snd_printk() for debugging purpose.
411 * Ignored when CONFIG_SND_DEBUG_DETECT is not set.
413 #define snd_printdd(format, args...) snd_printk(format, ##args)
414 #else
415 #define snd_printdd(format, args...) /* nothing */
416 #endif
419 #define SNDRV_OSS_VERSION ((3<<16)|(8<<8)|(1<<4)|(0)) /* 3.8.1a */
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
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
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
451 const struct snd_pci_quirk *
452 snd_pci_quirk_lookup(struct pci_dev *pci, const struct snd_pci_quirk *list);
455 #endif /* __SOUND_CORE_H */