1 /* SPDX-License-Identifier: GPL-2.0-or-later */ 2 #ifndef __SOUND_CORE_H 3 #define __SOUND_CORE_H 4 5 /* 6 * Main header file for the ALSA driver 7 * Copyright (c) 1994-2001 by Jaroslav Kysela <perex@perex.cz> 8 */ 9 10 #include <linux/device.h> 11 #include <linux/sched.h> /* wake_up() */ 12 #include <linux/mutex.h> /* struct mutex */ 13 #include <linux/rwsem.h> /* struct rw_semaphore */ 14 #include <linux/pm.h> /* pm_message_t */ 15 #include <linux/stringify.h> 16 #include <linux/printk.h> 17 18 /* number of supported soundcards */ 19 #ifdef CONFIG_SND_DYNAMIC_MINORS 20 #define SNDRV_CARDS CONFIG_SND_MAX_CARDS 21 #else 22 #define SNDRV_CARDS 8 /* don't change - minor numbers */ 23 #endif 24 25 #define CONFIG_SND_MAJOR 116 /* standard configuration */ 26 27 /* forward declarations */ 28 struct pci_dev; 29 struct module; 30 struct completion; 31 32 /* device allocation stuff */ 33 34 /* type of the object used in snd_device_*() 35 * this also defines the calling order 36 */ 37 enum snd_device_type { 38 SNDRV_DEV_LOWLEVEL, 39 SNDRV_DEV_INFO, 40 SNDRV_DEV_BUS, 41 SNDRV_DEV_CODEC, 42 SNDRV_DEV_PCM, 43 SNDRV_DEV_COMPRESS, 44 SNDRV_DEV_RAWMIDI, 45 SNDRV_DEV_TIMER, 46 SNDRV_DEV_SEQUENCER, 47 SNDRV_DEV_HWDEP, 48 SNDRV_DEV_JACK, 49 SNDRV_DEV_CONTROL, /* NOTE: this must be the last one */ 50 }; 51 52 enum snd_device_state { 53 SNDRV_DEV_BUILD, 54 SNDRV_DEV_REGISTERED, 55 SNDRV_DEV_DISCONNECTED, 56 }; 57 58 struct snd_device; 59 60 struct snd_device_ops { 61 int (*dev_free)(struct snd_device *dev); 62 int (*dev_register)(struct snd_device *dev); 63 int (*dev_disconnect)(struct snd_device *dev); 64 }; 65 66 struct snd_device { 67 struct list_head list; /* list of registered devices */ 68 struct snd_card *card; /* card which holds this device */ 69 enum snd_device_state state; /* state of the device */ 70 enum snd_device_type type; /* device type */ 71 void *device_data; /* device structure */ 72 struct snd_device_ops *ops; /* operations */ 73 }; 74 75 #define snd_device(n) list_entry(n, struct snd_device, list) 76 77 /* main structure for soundcard */ 78 79 struct snd_card { 80 int number; /* number of soundcard (index to 81 snd_cards) */ 82 83 char id[16]; /* id string of this card */ 84 char driver[16]; /* driver name */ 85 char shortname[32]; /* short name of this soundcard */ 86 char longname[80]; /* name of this soundcard */ 87 char irq_descr[32]; /* Interrupt description */ 88 char mixername[80]; /* mixer name */ 89 char components[128]; /* card components delimited with 90 space */ 91 struct module *module; /* top-level module */ 92 93 void *private_data; /* private data for soundcard */ 94 void (*private_free) (struct snd_card *card); /* callback for freeing of 95 private data */ 96 struct list_head devices; /* devices */ 97 98 struct device ctl_dev; /* control device */ 99 unsigned int last_numid; /* last used numeric ID */ 100 struct rw_semaphore controls_rwsem; /* controls list lock */ 101 rwlock_t ctl_files_rwlock; /* ctl_files list lock */ 102 int controls_count; /* count of all controls */ 103 int user_ctl_count; /* count of all user controls */ 104 struct list_head controls; /* all controls for this card */ 105 struct list_head ctl_files; /* active control files */ 106 107 struct snd_info_entry *proc_root; /* root for soundcard specific files */ 108 struct proc_dir_entry *proc_root_link; /* number link to real id */ 109 110 struct list_head files_list; /* all files associated to this card */ 111 struct snd_shutdown_f_ops *s_f_ops; /* file operations in the shutdown 112 state */ 113 spinlock_t files_lock; /* lock the files for this card */ 114 int shutdown; /* this card is going down */ 115 struct completion *release_completion; 116 struct device *dev; /* device assigned to this card */ 117 struct device card_dev; /* cardX object for sysfs */ 118 const struct attribute_group *dev_groups[4]; /* assigned sysfs attr */ 119 bool registered; /* card_dev is registered? */ 120 wait_queue_head_t remove_sleep; 121 122 #ifdef CONFIG_PM 123 unsigned int power_state; /* power state */ 124 wait_queue_head_t power_sleep; 125 #endif 126 127 #if IS_ENABLED(CONFIG_SND_MIXER_OSS) 128 struct snd_mixer_oss *mixer_oss; 129 int mixer_oss_change_count; 130 #endif 131 }; 132 133 #define dev_to_snd_card(p) container_of(p, struct snd_card, card_dev) 134 135 #ifdef CONFIG_PM 136 static inline unsigned int snd_power_get_state(struct snd_card *card) 137 { 138 return card->power_state; 139 } 140 141 static inline void snd_power_change_state(struct snd_card *card, unsigned int state) 142 { 143 card->power_state = state; 144 wake_up(&card->power_sleep); 145 } 146 147 /* init.c */ 148 int snd_power_wait(struct snd_card *card, unsigned int power_state); 149 150 #else /* ! CONFIG_PM */ 151 152 static inline int snd_power_wait(struct snd_card *card, unsigned int state) { return 0; } 153 #define snd_power_get_state(card) ({ (void)(card); SNDRV_CTL_POWER_D0; }) 154 #define snd_power_change_state(card, state) do { (void)(card); } while (0) 155 156 #endif /* CONFIG_PM */ 157 158 struct snd_minor { 159 int type; /* SNDRV_DEVICE_TYPE_XXX */ 160 int card; /* card number */ 161 int device; /* device number */ 162 const struct file_operations *f_ops; /* file operations */ 163 void *private_data; /* private data for f_ops->open */ 164 struct device *dev; /* device for sysfs */ 165 struct snd_card *card_ptr; /* assigned card instance */ 166 }; 167 168 /* return a device pointer linked to each sound device as a parent */ 169 static inline struct device *snd_card_get_device_link(struct snd_card *card) 170 { 171 return card ? &card->card_dev : NULL; 172 } 173 174 /* sound.c */ 175 176 extern int snd_major; 177 extern int snd_ecards_limit; 178 extern struct class *sound_class; 179 180 void snd_request_card(int card); 181 182 void snd_device_initialize(struct device *dev, struct snd_card *card); 183 184 int snd_register_device(int type, struct snd_card *card, int dev, 185 const struct file_operations *f_ops, 186 void *private_data, struct device *device); 187 int snd_unregister_device(struct device *dev); 188 void *snd_lookup_minor_data(unsigned int minor, int type); 189 190 #ifdef CONFIG_SND_OSSEMUL 191 int snd_register_oss_device(int type, struct snd_card *card, int dev, 192 const struct file_operations *f_ops, void *private_data); 193 int snd_unregister_oss_device(int type, struct snd_card *card, int dev); 194 void *snd_lookup_oss_minor_data(unsigned int minor, int type); 195 #endif 196 197 int snd_minor_info_init(void); 198 199 /* sound_oss.c */ 200 201 #ifdef CONFIG_SND_OSSEMUL 202 int snd_minor_info_oss_init(void); 203 #else 204 static inline int snd_minor_info_oss_init(void) { return 0; } 205 #endif 206 207 /* memory.c */ 208 209 int copy_to_user_fromio(void __user *dst, const volatile void __iomem *src, size_t count); 210 int copy_from_user_toio(volatile void __iomem *dst, const void __user *src, size_t count); 211 212 /* init.c */ 213 214 int snd_card_locked(int card); 215 #if IS_ENABLED(CONFIG_SND_MIXER_OSS) 216 #define SND_MIXER_OSS_NOTIFY_REGISTER 0 217 #define SND_MIXER_OSS_NOTIFY_DISCONNECT 1 218 #define SND_MIXER_OSS_NOTIFY_FREE 2 219 extern int (*snd_mixer_oss_notify_callback)(struct snd_card *card, int cmd); 220 #endif 221 222 int snd_card_new(struct device *parent, int idx, const char *xid, 223 struct module *module, int extra_size, 224 struct snd_card **card_ret); 225 226 int snd_card_disconnect(struct snd_card *card); 227 void snd_card_disconnect_sync(struct snd_card *card); 228 int snd_card_free(struct snd_card *card); 229 int snd_card_free_when_closed(struct snd_card *card); 230 void snd_card_set_id(struct snd_card *card, const char *id); 231 int snd_card_register(struct snd_card *card); 232 int snd_card_info_init(void); 233 int snd_card_add_dev_attr(struct snd_card *card, 234 const struct attribute_group *group); 235 int snd_component_add(struct snd_card *card, const char *component); 236 int snd_card_file_add(struct snd_card *card, struct file *file); 237 int snd_card_file_remove(struct snd_card *card, struct file *file); 238 239 struct snd_card *snd_card_ref(int card); 240 241 /** 242 * snd_card_unref - Unreference the card object 243 * @card: the card object to unreference 244 * 245 * Call this function for the card object that was obtained via snd_card_ref() 246 * or snd_lookup_minor_data(). 247 */ 248 static inline void snd_card_unref(struct snd_card *card) 249 { 250 put_device(&card->card_dev); 251 } 252 253 #define snd_card_set_dev(card, devptr) ((card)->dev = (devptr)) 254 255 /* device.c */ 256 257 int snd_device_new(struct snd_card *card, enum snd_device_type type, 258 void *device_data, struct snd_device_ops *ops); 259 int snd_device_register(struct snd_card *card, void *device_data); 260 int snd_device_register_all(struct snd_card *card); 261 void snd_device_disconnect(struct snd_card *card, void *device_data); 262 void snd_device_disconnect_all(struct snd_card *card); 263 void snd_device_free(struct snd_card *card, void *device_data); 264 void snd_device_free_all(struct snd_card *card); 265 266 /* isadma.c */ 267 268 #ifdef CONFIG_ISA_DMA_API 269 #define DMA_MODE_NO_ENABLE 0x0100 270 271 void snd_dma_program(unsigned long dma, unsigned long addr, unsigned int size, unsigned short mode); 272 void snd_dma_disable(unsigned long dma); 273 unsigned int snd_dma_pointer(unsigned long dma, unsigned int size); 274 #endif 275 276 /* misc.c */ 277 struct resource; 278 void release_and_free_resource(struct resource *res); 279 280 /* --- */ 281 282 /* sound printk debug levels */ 283 enum { 284 SND_PR_ALWAYS, 285 SND_PR_DEBUG, 286 SND_PR_VERBOSE, 287 }; 288 289 #if defined(CONFIG_SND_DEBUG) || defined(CONFIG_SND_VERBOSE_PRINTK) 290 __printf(4, 5) 291 void __snd_printk(unsigned int level, const char *file, int line, 292 const char *format, ...); 293 #else 294 #define __snd_printk(level, file, line, format, ...) \ 295 printk(format, ##__VA_ARGS__) 296 #endif 297 298 /** 299 * snd_printk - printk wrapper 300 * @fmt: format string 301 * 302 * Works like printk() but prints the file and the line of the caller 303 * when configured with CONFIG_SND_VERBOSE_PRINTK. 304 */ 305 #define snd_printk(fmt, ...) \ 306 __snd_printk(0, __FILE__, __LINE__, fmt, ##__VA_ARGS__) 307 308 #ifdef CONFIG_SND_DEBUG 309 /** 310 * snd_printd - debug printk 311 * @fmt: format string 312 * 313 * Works like snd_printk() for debugging purposes. 314 * Ignored when CONFIG_SND_DEBUG is not set. 315 */ 316 #define snd_printd(fmt, ...) \ 317 __snd_printk(1, __FILE__, __LINE__, fmt, ##__VA_ARGS__) 318 #define _snd_printd(level, fmt, ...) \ 319 __snd_printk(level, __FILE__, __LINE__, fmt, ##__VA_ARGS__) 320 321 /** 322 * snd_BUG - give a BUG warning message and stack trace 323 * 324 * Calls WARN() if CONFIG_SND_DEBUG is set. 325 * Ignored when CONFIG_SND_DEBUG is not set. 326 */ 327 #define snd_BUG() WARN(1, "BUG?\n") 328 329 /** 330 * Suppress high rates of output when CONFIG_SND_DEBUG is enabled. 331 */ 332 #define snd_printd_ratelimit() printk_ratelimit() 333 334 /** 335 * snd_BUG_ON - debugging check macro 336 * @cond: condition to evaluate 337 * 338 * Has the same behavior as WARN_ON when CONFIG_SND_DEBUG is set, 339 * otherwise just evaluates the conditional and returns the value. 340 */ 341 #define snd_BUG_ON(cond) WARN_ON((cond)) 342 343 #else /* !CONFIG_SND_DEBUG */ 344 345 __printf(1, 2) 346 static inline void snd_printd(const char *format, ...) {} 347 __printf(2, 3) 348 static inline void _snd_printd(int level, const char *format, ...) {} 349 350 #define snd_BUG() do { } while (0) 351 352 #define snd_BUG_ON(condition) ({ \ 353 int __ret_warn_on = !!(condition); \ 354 unlikely(__ret_warn_on); \ 355 }) 356 357 static inline bool snd_printd_ratelimit(void) { return false; } 358 359 #endif /* CONFIG_SND_DEBUG */ 360 361 #ifdef CONFIG_SND_DEBUG_VERBOSE 362 /** 363 * snd_printdd - debug printk 364 * @format: format string 365 * 366 * Works like snd_printk() for debugging purposes. 367 * Ignored when CONFIG_SND_DEBUG_VERBOSE is not set. 368 */ 369 #define snd_printdd(format, ...) \ 370 __snd_printk(2, __FILE__, __LINE__, format, ##__VA_ARGS__) 371 #else 372 __printf(1, 2) 373 static inline void snd_printdd(const char *format, ...) {} 374 #endif 375 376 377 #define SNDRV_OSS_VERSION ((3<<16)|(8<<8)|(1<<4)|(0)) /* 3.8.1a */ 378 379 /* for easier backward-porting */ 380 #if IS_ENABLED(CONFIG_GAMEPORT) 381 #define gameport_set_dev_parent(gp,xdev) ((gp)->dev.parent = (xdev)) 382 #define gameport_set_port_data(gp,r) ((gp)->port_data = (r)) 383 #define gameport_get_port_data(gp) (gp)->port_data 384 #endif 385 386 /* PCI quirk list helper */ 387 struct snd_pci_quirk { 388 unsigned short subvendor; /* PCI subvendor ID */ 389 unsigned short subdevice; /* PCI subdevice ID */ 390 unsigned short subdevice_mask; /* bitmask to match */ 391 int value; /* value */ 392 #ifdef CONFIG_SND_DEBUG_VERBOSE 393 const char *name; /* name of the device (optional) */ 394 #endif 395 }; 396 397 #define _SND_PCI_QUIRK_ID_MASK(vend, mask, dev) \ 398 .subvendor = (vend), .subdevice = (dev), .subdevice_mask = (mask) 399 #define _SND_PCI_QUIRK_ID(vend, dev) \ 400 _SND_PCI_QUIRK_ID_MASK(vend, 0xffff, dev) 401 #define SND_PCI_QUIRK_ID(vend,dev) {_SND_PCI_QUIRK_ID(vend, dev)} 402 #ifdef CONFIG_SND_DEBUG_VERBOSE 403 #define SND_PCI_QUIRK(vend,dev,xname,val) \ 404 {_SND_PCI_QUIRK_ID(vend, dev), .value = (val), .name = (xname)} 405 #define SND_PCI_QUIRK_VENDOR(vend, xname, val) \ 406 {_SND_PCI_QUIRK_ID_MASK(vend, 0, 0), .value = (val), .name = (xname)} 407 #define SND_PCI_QUIRK_MASK(vend, mask, dev, xname, val) \ 408 {_SND_PCI_QUIRK_ID_MASK(vend, mask, dev), \ 409 .value = (val), .name = (xname)} 410 #define snd_pci_quirk_name(q) ((q)->name) 411 #else 412 #define SND_PCI_QUIRK(vend,dev,xname,val) \ 413 {_SND_PCI_QUIRK_ID(vend, dev), .value = (val)} 414 #define SND_PCI_QUIRK_MASK(vend, mask, dev, xname, val) \ 415 {_SND_PCI_QUIRK_ID_MASK(vend, mask, dev), .value = (val)} 416 #define SND_PCI_QUIRK_VENDOR(vend, xname, val) \ 417 {_SND_PCI_QUIRK_ID_MASK(vend, 0, 0), .value = (val)} 418 #define snd_pci_quirk_name(q) "" 419 #endif 420 421 #ifdef CONFIG_PCI 422 const struct snd_pci_quirk * 423 snd_pci_quirk_lookup(struct pci_dev *pci, const struct snd_pci_quirk *list); 424 425 const struct snd_pci_quirk * 426 snd_pci_quirk_lookup_id(u16 vendor, u16 device, 427 const struct snd_pci_quirk *list); 428 #else 429 static inline const struct snd_pci_quirk * 430 snd_pci_quirk_lookup(struct pci_dev *pci, const struct snd_pci_quirk *list) 431 { 432 return NULL; 433 } 434 435 static inline const struct snd_pci_quirk * 436 snd_pci_quirk_lookup_id(u16 vendor, u16 device, 437 const struct snd_pci_quirk *list) 438 { 439 return NULL; 440 } 441 #endif 442 443 #endif /* __SOUND_CORE_H */ 444