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 */ 460