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 /* monitor files for graceful shutdown (hotplug) */
97
98 struct snd_monitor_file {
99 struct file *file;
100 const struct file_operations *disconnected_f_op;
101 struct list_head shutdown_list; /* still need to shutdown */
102 struct list_head list; /* link of monitor files */
103 };
104
105 /* main structure for soundcard */
106
107 struct snd_card {
108 int number; /* number of soundcard (index to
109 snd_cards) */
110
111 char id[16]; /* id string of this card */
112 char driver[16]; /* driver name */
113 char shortname[32]; /* short name of this soundcard */
114 char longname[80]; /* name of this soundcard */
115 char mixername[80]; /* mixer name */
116 char components[128]; /* card components delimited with
117 space */
118 struct module *module; /* top-level module */
119
120 void *private_data; /* private data for soundcard */
121 void (*private_free) (struct snd_card *card); /* callback for freeing of
122 private data */
123 struct list_head devices; /* devices */
124
125 unsigned int last_numid; /* last used numeric ID */
126 struct rw_semaphore controls_rwsem; /* controls list lock */
127 rwlock_t ctl_files_rwlock; /* ctl_files list lock */
128 int controls_count; /* count of all controls */
129 int user_ctl_count; /* count of all user controls */
130 struct list_head controls; /* all controls for this card */
131 struct list_head ctl_files; /* active control files */
132
133 struct snd_info_entry *proc_root; /* root for soundcard specific files */
134 struct snd_info_entry *proc_id; /* the card id */
135 struct proc_dir_entry *proc_root_link; /* number link to real id */
136
137 struct list_head files_list; /* all files associated to this card */
138 struct snd_shutdown_f_ops *s_f_ops; /* file operations in the shutdown
139 state */
140 spinlock_t files_lock; /* lock the files for this card */
141 int shutdown; /* this card is going down */
142 int free_on_last_close; /* free in context of file_release */
143 wait_queue_head_t shutdown_sleep;
144 struct device *dev; /* device assigned to this card */
145 #ifndef CONFIG_SYSFS_DEPRECATED
146 struct device *card_dev; /* cardX object for sysfs */
147 #endif
148
149 #ifdef CONFIG_PM
150 unsigned int power_state; /* power state */
151 struct mutex power_lock; /* power lock */
152 wait_queue_head_t power_sleep;
153 #endif
154
155 #if defined(CONFIG_SND_MIXER_OSS) || defined(CONFIG_SND_MIXER_OSS_MODULE)
156 struct snd_mixer_oss *mixer_oss;
157 int mixer_oss_change_count;
158 #endif
159 };
160
161 #ifdef CONFIG_PM
162 static inline void snd_power_lock(struct snd_card *card)
163 {
164 mutex_lock(&card->power_lock);
165 }
166
167 static inline void snd_power_unlock(struct snd_card *card)
168 {
169 mutex_unlock(&card->power_lock);
170 }
171
172 static inline unsigned int snd_power_get_state(struct snd_card *card)
173 {
174 return card->power_state;
175 }
176
177 static inline void snd_power_change_state(struct snd_card *card, unsigned int state)
178 {
179 card->power_state = state;
180 wake_up(&card->power_sleep);
181 }
182
183 /* init.c */
184 int snd_power_wait(struct snd_card *card, unsigned int power_state);
185
186 #else /* ! CONFIG_PM */
187
188 #define snd_power_lock(card) do { (void)(card); } while (0)
189 #define snd_power_unlock(card) do { (void)(card); } while (0)
190 static inline int snd_power_wait(struct snd_card *card, unsigned int state) { return 0; }
191 #define snd_power_get_state(card) SNDRV_CTL_POWER_D0
192 #define snd_power_change_state(card, state) do { (void)(card); } while (0)
193
194 #endif /* CONFIG_PM */
195
196 struct snd_minor {
197 int type; /* SNDRV_DEVICE_TYPE_XXX */
198 int card; /* card number */
199 int device; /* device number */
200 const struct file_operations *f_ops; /* file operations */
201 void *private_data; /* private data for f_ops->open */
202 struct device *dev; /* device for sysfs */
203 };
204
205 /* return a device pointer linked to each sound device as a parent */
206 static inline struct device *snd_card_get_device_link(struct snd_card *card)
207 {
208 #ifdef CONFIG_SYSFS_DEPRECATED
209 return card ? card->dev : NULL;
210 #else
211 return card ? card->card_dev : NULL;
212 #endif
213 }
214
215 /* sound.c */
216
217 extern int snd_major;
218 extern int snd_ecards_limit;
219 extern struct class *sound_class;
220
221 void snd_request_card(int card);
222
223 int snd_register_device_for_dev(int type, struct snd_card *card,
224 int dev,
225 const struct file_operations *f_ops,
226 void *private_data,
227 const char *name,
228 struct device *device);
229
230 /**
231 * snd_register_device - Register the ALSA device file for the card
232 * @type: the device type, SNDRV_DEVICE_TYPE_XXX
233 * @card: the card instance
234 * @dev: the device index
235 * @f_ops: the file operations
236 * @private_data: user pointer for f_ops->open()
237 * @name: the device file name
238 *
239 * Registers an ALSA device file for the given card.
240 * The operators have to be set in reg parameter.
241 *
242 * This function uses the card's device pointer to link to the
243 * correct &struct device.
244 *
245 * Returns zero if successful, or a negative error code on failure.
246 */
247 static inline int snd_register_device(int type, struct snd_card *card, int dev,
248 const struct file_operations *f_ops,
249 void *private_data,
250 const char *name)
251 {
252 return snd_register_device_for_dev(type, card, dev, f_ops,
253 private_data, name,
254 snd_card_get_device_link(card));
255 }
256
257 int snd_unregister_device(int type, struct snd_card *card, int dev);
258 void *snd_lookup_minor_data(unsigned int minor, int type);
259 int snd_add_device_sysfs_file(int type, struct snd_card *card, int dev,
260 struct device_attribute *attr);
261
262 #ifdef CONFIG_SND_OSSEMUL
263 int snd_register_oss_device(int type, struct snd_card *card, int dev,
264 const struct file_operations *f_ops, void *private_data,
265 const char *name);
266 int snd_unregister_oss_device(int type, struct snd_card *card, int dev);
267 void *snd_lookup_oss_minor_data(unsigned int minor, int type);
268 #endif
269
270 int snd_minor_info_init(void);
271 int snd_minor_info_done(void);
272
273 /* sound_oss.c */
274
275 #ifdef CONFIG_SND_OSSEMUL
276 int snd_minor_info_oss_init(void);
277 int snd_minor_info_oss_done(void);
278 #else
279 static inline int snd_minor_info_oss_init(void) { return 0; }
280 static inline int snd_minor_info_oss_done(void) { return 0; }
281 #endif
282
283 /* memory.c */
284
285 int copy_to_user_fromio(void __user *dst, const volatile void __iomem *src, size_t count);
286 int copy_from_user_toio(volatile void __iomem *dst, const void __user *src, size_t count);
287
288 /* init.c */
289
290 extern struct snd_card *snd_cards[SNDRV_CARDS];
291 int snd_card_locked(int card);
292 #if defined(CONFIG_SND_MIXER_OSS) || defined(CONFIG_SND_MIXER_OSS_MODULE)
293 #define SND_MIXER_OSS_NOTIFY_REGISTER 0
294 #define SND_MIXER_OSS_NOTIFY_DISCONNECT 1
295 #define SND_MIXER_OSS_NOTIFY_FREE 2
296 extern int (*snd_mixer_oss_notify_callback)(struct snd_card *card, int cmd);
297 #endif
298
299 int snd_card_create(int idx, const char *id,
300 struct module *module, int extra_size,
301 struct snd_card **card_ret);
302
303 int snd_card_disconnect(struct snd_card *card);
304 int snd_card_free(struct snd_card *card);
305 int snd_card_free_when_closed(struct snd_card *card);
306 void snd_card_set_id(struct snd_card *card, const char *id);
307 int snd_card_register(struct snd_card *card);
308 int snd_card_info_init(void);
309 int snd_card_info_done(void);
310 int snd_component_add(struct snd_card *card, const char *component);
311 int snd_card_file_add(struct snd_card *card, struct file *file);
312 int snd_card_file_remove(struct snd_card *card, struct file *file);
313
314 #ifndef snd_card_set_dev
315 #define snd_card_set_dev(card, devptr) ((card)->dev = (devptr))
316 #endif
317
318 /* device.c */
319
320 int snd_device_new(struct snd_card *card, snd_device_type_t type,
321 void *device_data, struct snd_device_ops *ops);
322 int snd_device_register(struct snd_card *card, void *device_data);
323 int snd_device_register_all(struct snd_card *card);
324 int snd_device_disconnect(struct snd_card *card, void *device_data);
325 int snd_device_disconnect_all(struct snd_card *card);
326 int snd_device_free(struct snd_card *card, void *device_data);
327 int snd_device_free_all(struct snd_card *card, snd_device_cmd_t cmd);
328
329 /* isadma.c */
330
331 #ifdef CONFIG_ISA_DMA_API
332 #define DMA_MODE_NO_ENABLE 0x0100
333
334 void snd_dma_program(unsigned long dma, unsigned long addr, unsigned int size, unsigned short mode);
335 void snd_dma_disable(unsigned long dma);
336 unsigned int snd_dma_pointer(unsigned long dma, unsigned int size);
337 #endif
338
339 /* misc.c */
340 struct resource;
341 void release_and_free_resource(struct resource *res);
342
343 #ifdef CONFIG_SND_VERBOSE_PRINTK
344 void snd_verbose_printk(const char *file, int line, const char *format, ...)
345 __attribute__ ((format (printf, 3, 4)));
346 #endif
347 #if defined(CONFIG_SND_DEBUG) && defined(CONFIG_SND_VERBOSE_PRINTK)
348 void snd_verbose_printd(const char *file, int line, const char *format, ...)
349 __attribute__ ((format (printf, 3, 4)));
350 #endif
351
352 /* --- */
353
354 #ifdef CONFIG_SND_VERBOSE_PRINTK
355 /**
356 * snd_printk - printk wrapper
357 * @fmt: format string
358 *
359 * Works like printk() but prints the file and the line of the caller
360 * when configured with CONFIG_SND_VERBOSE_PRINTK.
361 */
362 #define snd_printk(fmt, args...) \
363 snd_verbose_printk(__FILE__, __LINE__, fmt ,##args)
364 #else
365 #define snd_printk(fmt, args...) \
366 printk(fmt ,##args)
367 #endif
368
369 #ifdef CONFIG_SND_DEBUG
370
371 #ifdef CONFIG_SND_VERBOSE_PRINTK
372 /**
373 * snd_printd - debug printk
374 * @fmt: format string
375 *
376 * Works like snd_printk() for debugging purposes.
377 * Ignored when CONFIG_SND_DEBUG is not set.
378 */
379 #define snd_printd(fmt, args...) \
380 snd_verbose_printd(__FILE__, __LINE__, fmt ,##args)
381 #else
382 #define snd_printd(fmt, args...) \
383 printk(fmt ,##args)
384 #endif
385
386 /**
387 * snd_BUG - give a BUG warning message and stack trace
388 *
389 * Calls WARN() if CONFIG_SND_DEBUG is set.
390 * Ignored when CONFIG_SND_DEBUG is not set.
391 */
392 #define snd_BUG() WARN(1, "BUG?\n")
393
394 /**
395 * snd_BUG_ON - debugging check macro
396 * @cond: condition to evaluate
397 *
398 * When CONFIG_SND_DEBUG is set, this macro evaluates the given condition,
399 * and call WARN() and returns the value if it's non-zero.
400 *
401 * When CONFIG_SND_DEBUG is not set, this just returns zero, and the given
402 * condition is ignored.
403 *
404 * NOTE: the argument won't be evaluated at all when CONFIG_SND_DEBUG=n.
405 * Thus, don't put any statement that influences on the code behavior,
406 * such as pre/post increment, to the argument of this macro.
407 * If you want to evaluate and give a warning, use standard WARN_ON().
408 */
409 #define snd_BUG_ON(cond) WARN((cond), "BUG? (%s)\n", __stringify(cond))
410
411 #else /* !CONFIG_SND_DEBUG */
412
413 #define snd_printd(fmt, args...) do { } while (0)
414 #define snd_BUG() do { } while (0)
415 static inline int __snd_bug_on(int cond)
416 {
417 return 0;
418 }
419 #define snd_BUG_ON(cond) __snd_bug_on(0 && (cond)) /* always false */
420
421 #endif /* CONFIG_SND_DEBUG */
422
423 #ifdef CONFIG_SND_DEBUG_VERBOSE
424 /**
425 * snd_printdd - debug printk
426 * @format: format string
427 *
428 * Works like snd_printk() for debugging purposes.
429 * Ignored when CONFIG_SND_DEBUG_VERBOSE is not set.
430 */
431 #define snd_printdd(format, args...) snd_printk(format, ##args)
432 #else
433 #define snd_printdd(format, args...) /* nothing */
434 #endif
435
436
437 #define SNDRV_OSS_VERSION ((3<<16)|(8<<8)|(1<<4)|(0)) /* 3.8.1a */
438
439 /* for easier backward-porting */
440 #if defined(CONFIG_GAMEPORT) || defined(CONFIG_GAMEPORT_MODULE)
441 #ifndef gameport_set_dev_parent
442 #define gameport_set_dev_parent(gp,xdev) ((gp)->dev.parent = (xdev))
443 #define gameport_set_port_data(gp,r) ((gp)->port_data = (r))
444 #define gameport_get_port_data(gp) (gp)->port_data
445 #endif
446 #endif
447
448 /* PCI quirk list helper */
449 struct snd_pci_quirk {
450 unsigned short subvendor; /* PCI subvendor ID */
451 unsigned short subdevice; /* PCI subdevice ID */
452 unsigned short subdevice_mask; /* bitmask to match */
453 int value; /* value */
454 #ifdef CONFIG_SND_DEBUG_VERBOSE
455 const char *name; /* name of the device (optional) */
456 #endif
457 };
458
459 #define _SND_PCI_QUIRK_ID_MASK(vend, mask, dev) \
460 .subvendor = (vend), .subdevice = (dev), .subdevice_mask = (mask)
461 #define _SND_PCI_QUIRK_ID(vend, dev) \
462 _SND_PCI_QUIRK_ID_MASK(vend, 0xffff, dev)
463 #define SND_PCI_QUIRK_ID(vend,dev) {_SND_PCI_QUIRK_ID(vend, dev)}
464 #ifdef CONFIG_SND_DEBUG_VERBOSE
465 #define SND_PCI_QUIRK(vend,dev,xname,val) \
466 {_SND_PCI_QUIRK_ID(vend, dev), .value = (val), .name = (xname)}
467 #define SND_PCI_QUIRK_VENDOR(vend, xname, val) \
468 {_SND_PCI_QUIRK_ID_MASK(vend, 0, 0), .value = (val), .name = (xname)}
469 #define SND_PCI_QUIRK_MASK(vend, mask, dev, xname, val) \
470 {_SND_PCI_QUIRK_ID_MASK(vend, mask, dev), \
471 .value = (val), .name = (xname)}
472 #else
473 #define SND_PCI_QUIRK(vend,dev,xname,val) \
474 {_SND_PCI_QUIRK_ID(vend, dev), .value = (val)}
475 #define SND_PCI_QUIRK_MASK(vend, mask, dev, xname, val) \
476 {_SND_PCI_QUIRK_ID_MASK(vend, mask, dev), .value = (val)}
477 #define SND_PCI_QUIRK_VENDOR(vend, xname, val) \
478 {_SND_PCI_QUIRK_ID_MASK(vend, 0, 0), .value = (val)}
479 #endif
480
481 const struct snd_pci_quirk *
482 snd_pci_quirk_lookup(struct pci_dev *pci, const struct snd_pci_quirk *list);
483
484
485 #endif /* __SOUND_CORE_H */
486
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