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 const 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 size_t user_ctl_alloc_size; // current memory allocation by 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 int sync_irq; /* assigned irq, used for PCM sync */ 121 wait_queue_head_t remove_sleep; 122 123 size_t total_pcm_alloc_bytes; /* total amount of allocated buffers */ 124 struct mutex memory_mutex; /* protection for the above */ 125 #ifdef CONFIG_SND_DEBUG 126 struct dentry *debugfs_root; /* debugfs root for card */ 127 #endif 128 129 #ifdef CONFIG_PM 130 unsigned int power_state; /* power state */ 131 wait_queue_head_t power_sleep; 132 #endif 133 134 #if IS_ENABLED(CONFIG_SND_MIXER_OSS) 135 struct snd_mixer_oss *mixer_oss; 136 int mixer_oss_change_count; 137 #endif 138 }; 139 140 #define dev_to_snd_card(p) container_of(p, struct snd_card, card_dev) 141 142 #ifdef CONFIG_PM 143 static inline unsigned int snd_power_get_state(struct snd_card *card) 144 { 145 return card->power_state; 146 } 147 148 static inline void snd_power_change_state(struct snd_card *card, unsigned int state) 149 { 150 card->power_state = state; 151 wake_up(&card->power_sleep); 152 } 153 154 /* init.c */ 155 int snd_power_wait(struct snd_card *card, unsigned int power_state); 156 157 #else /* ! CONFIG_PM */ 158 159 static inline int snd_power_wait(struct snd_card *card, unsigned int state) { return 0; } 160 #define snd_power_get_state(card) ({ (void)(card); SNDRV_CTL_POWER_D0; }) 161 #define snd_power_change_state(card, state) do { (void)(card); } while (0) 162 163 #endif /* CONFIG_PM */ 164 165 struct snd_minor { 166 int type; /* SNDRV_DEVICE_TYPE_XXX */ 167 int card; /* card number */ 168 int device; /* device number */ 169 const struct file_operations *f_ops; /* file operations */ 170 void *private_data; /* private data for f_ops->open */ 171 struct device *dev; /* device for sysfs */ 172 struct snd_card *card_ptr; /* assigned card instance */ 173 }; 174 175 /* return a device pointer linked to each sound device as a parent */ 176 static inline struct device *snd_card_get_device_link(struct snd_card *card) 177 { 178 return card ? &card->card_dev : NULL; 179 } 180 181 /* sound.c */ 182 183 extern int snd_major; 184 extern int snd_ecards_limit; 185 extern struct class *sound_class; 186 #ifdef CONFIG_SND_DEBUG 187 extern struct dentry *sound_debugfs_root; 188 #endif 189 190 void snd_request_card(int card); 191 192 void snd_device_initialize(struct device *dev, struct snd_card *card); 193 194 int snd_register_device(int type, struct snd_card *card, int dev, 195 const struct file_operations *f_ops, 196 void *private_data, struct device *device); 197 int snd_unregister_device(struct device *dev); 198 void *snd_lookup_minor_data(unsigned int minor, int type); 199 200 #ifdef CONFIG_SND_OSSEMUL 201 int snd_register_oss_device(int type, struct snd_card *card, int dev, 202 const struct file_operations *f_ops, void *private_data); 203 int snd_unregister_oss_device(int type, struct snd_card *card, int dev); 204 void *snd_lookup_oss_minor_data(unsigned int minor, int type); 205 #endif 206 207 int snd_minor_info_init(void); 208 209 /* sound_oss.c */ 210 211 #ifdef CONFIG_SND_OSSEMUL 212 int snd_minor_info_oss_init(void); 213 #else 214 static inline int snd_minor_info_oss_init(void) { return 0; } 215 #endif 216 217 /* memory.c */ 218 219 int copy_to_user_fromio(void __user *dst, const volatile void __iomem *src, size_t count); 220 int copy_from_user_toio(volatile void __iomem *dst, const void __user *src, size_t count); 221 222 /* init.c */ 223 224 int snd_card_locked(int card); 225 #if IS_ENABLED(CONFIG_SND_MIXER_OSS) 226 #define SND_MIXER_OSS_NOTIFY_REGISTER 0 227 #define SND_MIXER_OSS_NOTIFY_DISCONNECT 1 228 #define SND_MIXER_OSS_NOTIFY_FREE 2 229 extern int (*snd_mixer_oss_notify_callback)(struct snd_card *card, int cmd); 230 #endif 231 232 int snd_card_new(struct device *parent, int idx, const char *xid, 233 struct module *module, int extra_size, 234 struct snd_card **card_ret); 235 236 int snd_card_disconnect(struct snd_card *card); 237 void snd_card_disconnect_sync(struct snd_card *card); 238 int snd_card_free(struct snd_card *card); 239 int snd_card_free_when_closed(struct snd_card *card); 240 void snd_card_set_id(struct snd_card *card, const char *id); 241 int snd_card_register(struct snd_card *card); 242 int snd_card_info_init(void); 243 int snd_card_add_dev_attr(struct snd_card *card, 244 const struct attribute_group *group); 245 int snd_component_add(struct snd_card *card, const char *component); 246 int snd_card_file_add(struct snd_card *card, struct file *file); 247 int snd_card_file_remove(struct snd_card *card, struct file *file); 248 249 struct snd_card *snd_card_ref(int card); 250 251 /** 252 * snd_card_unref - Unreference the card object 253 * @card: the card object to unreference 254 * 255 * Call this function for the card object that was obtained via snd_card_ref() 256 * or snd_lookup_minor_data(). 257 */ 258 static inline void snd_card_unref(struct snd_card *card) 259 { 260 put_device(&card->card_dev); 261 } 262 263 #define snd_card_set_dev(card, devptr) ((card)->dev = (devptr)) 264 265 /* device.c */ 266 267 int snd_device_new(struct snd_card *card, enum snd_device_type type, 268 void *device_data, const struct snd_device_ops *ops); 269 int snd_device_register(struct snd_card *card, void *device_data); 270 int snd_device_register_all(struct snd_card *card); 271 void snd_device_disconnect(struct snd_card *card, void *device_data); 272 void snd_device_disconnect_all(struct snd_card *card); 273 void snd_device_free(struct snd_card *card, void *device_data); 274 void snd_device_free_all(struct snd_card *card); 275 int snd_device_get_state(struct snd_card *card, void *device_data); 276 277 /* isadma.c */ 278 279 #ifdef CONFIG_ISA_DMA_API 280 #define DMA_MODE_NO_ENABLE 0x0100 281 282 void snd_dma_program(unsigned long dma, unsigned long addr, unsigned int size, unsigned short mode); 283 void snd_dma_disable(unsigned long dma); 284 unsigned int snd_dma_pointer(unsigned long dma, unsigned int size); 285 #endif 286 287 /* misc.c */ 288 struct resource; 289 void release_and_free_resource(struct resource *res); 290 291 /* --- */ 292 293 /* sound printk debug levels */ 294 enum { 295 SND_PR_ALWAYS, 296 SND_PR_DEBUG, 297 SND_PR_VERBOSE, 298 }; 299 300 #if defined(CONFIG_SND_DEBUG) || defined(CONFIG_SND_VERBOSE_PRINTK) 301 __printf(4, 5) 302 void __snd_printk(unsigned int level, const char *file, int line, 303 const char *format, ...); 304 #else 305 #define __snd_printk(level, file, line, format, ...) \ 306 printk(format, ##__VA_ARGS__) 307 #endif 308 309 /** 310 * snd_printk - printk wrapper 311 * @fmt: format string 312 * 313 * Works like printk() but prints the file and the line of the caller 314 * when configured with CONFIG_SND_VERBOSE_PRINTK. 315 */ 316 #define snd_printk(fmt, ...) \ 317 __snd_printk(0, __FILE__, __LINE__, fmt, ##__VA_ARGS__) 318 319 #ifdef CONFIG_SND_DEBUG 320 /** 321 * snd_printd - debug printk 322 * @fmt: format string 323 * 324 * Works like snd_printk() for debugging purposes. 325 * Ignored when CONFIG_SND_DEBUG is not set. 326 */ 327 #define snd_printd(fmt, ...) \ 328 __snd_printk(1, __FILE__, __LINE__, fmt, ##__VA_ARGS__) 329 #define _snd_printd(level, fmt, ...) \ 330 __snd_printk(level, __FILE__, __LINE__, fmt, ##__VA_ARGS__) 331 332 /** 333 * snd_BUG - give a BUG warning message and stack trace 334 * 335 * Calls WARN() if CONFIG_SND_DEBUG is set. 336 * Ignored when CONFIG_SND_DEBUG is not set. 337 */ 338 #define snd_BUG() WARN(1, "BUG?\n") 339 340 /** 341 * snd_printd_ratelimit - Suppress high rates of output when 342 * CONFIG_SND_DEBUG is enabled. 343 */ 344 #define snd_printd_ratelimit() printk_ratelimit() 345 346 /** 347 * snd_BUG_ON - debugging check macro 348 * @cond: condition to evaluate 349 * 350 * Has the same behavior as WARN_ON when CONFIG_SND_DEBUG is set, 351 * otherwise just evaluates the conditional and returns the value. 352 */ 353 #define snd_BUG_ON(cond) WARN_ON((cond)) 354 355 #else /* !CONFIG_SND_DEBUG */ 356 357 __printf(1, 2) 358 static inline void snd_printd(const char *format, ...) {} 359 __printf(2, 3) 360 static inline void _snd_printd(int level, const char *format, ...) {} 361 362 #define snd_BUG() do { } while (0) 363 364 #define snd_BUG_ON(condition) ({ \ 365 int __ret_warn_on = !!(condition); \ 366 unlikely(__ret_warn_on); \ 367 }) 368 369 static inline bool snd_printd_ratelimit(void) { return false; } 370 371 #endif /* CONFIG_SND_DEBUG */ 372 373 #ifdef CONFIG_SND_DEBUG_VERBOSE 374 /** 375 * snd_printdd - debug printk 376 * @format: format string 377 * 378 * Works like snd_printk() for debugging purposes. 379 * Ignored when CONFIG_SND_DEBUG_VERBOSE is not set. 380 */ 381 #define snd_printdd(format, ...) \ 382 __snd_printk(2, __FILE__, __LINE__, format, ##__VA_ARGS__) 383 #else 384 __printf(1, 2) 385 static inline void snd_printdd(const char *format, ...) {} 386 #endif 387 388 389 #define SNDRV_OSS_VERSION ((3<<16)|(8<<8)|(1<<4)|(0)) /* 3.8.1a */ 390 391 /* for easier backward-porting */ 392 #if IS_ENABLED(CONFIG_GAMEPORT) 393 #define gameport_set_dev_parent(gp,xdev) ((gp)->dev.parent = (xdev)) 394 #define gameport_set_port_data(gp,r) ((gp)->port_data = (r)) 395 #define gameport_get_port_data(gp) (gp)->port_data 396 #endif 397 398 /* PCI quirk list helper */ 399 struct snd_pci_quirk { 400 unsigned short subvendor; /* PCI subvendor ID */ 401 unsigned short subdevice; /* PCI subdevice ID */ 402 unsigned short subdevice_mask; /* bitmask to match */ 403 int value; /* value */ 404 #ifdef CONFIG_SND_DEBUG_VERBOSE 405 const char *name; /* name of the device (optional) */ 406 #endif 407 }; 408 409 #define _SND_PCI_QUIRK_ID_MASK(vend, mask, dev) \ 410 .subvendor = (vend), .subdevice = (dev), .subdevice_mask = (mask) 411 #define _SND_PCI_QUIRK_ID(vend, dev) \ 412 _SND_PCI_QUIRK_ID_MASK(vend, 0xffff, dev) 413 #define SND_PCI_QUIRK_ID(vend,dev) {_SND_PCI_QUIRK_ID(vend, dev)} 414 #ifdef CONFIG_SND_DEBUG_VERBOSE 415 #define SND_PCI_QUIRK(vend,dev,xname,val) \ 416 {_SND_PCI_QUIRK_ID(vend, dev), .value = (val), .name = (xname)} 417 #define SND_PCI_QUIRK_VENDOR(vend, xname, val) \ 418 {_SND_PCI_QUIRK_ID_MASK(vend, 0, 0), .value = (val), .name = (xname)} 419 #define SND_PCI_QUIRK_MASK(vend, mask, dev, xname, val) \ 420 {_SND_PCI_QUIRK_ID_MASK(vend, mask, dev), \ 421 .value = (val), .name = (xname)} 422 #define snd_pci_quirk_name(q) ((q)->name) 423 #else 424 #define SND_PCI_QUIRK(vend,dev,xname,val) \ 425 {_SND_PCI_QUIRK_ID(vend, dev), .value = (val)} 426 #define SND_PCI_QUIRK_MASK(vend, mask, dev, xname, val) \ 427 {_SND_PCI_QUIRK_ID_MASK(vend, mask, dev), .value = (val)} 428 #define SND_PCI_QUIRK_VENDOR(vend, xname, val) \ 429 {_SND_PCI_QUIRK_ID_MASK(vend, 0, 0), .value = (val)} 430 #define snd_pci_quirk_name(q) "" 431 #endif 432 433 #ifdef CONFIG_PCI 434 const struct snd_pci_quirk * 435 snd_pci_quirk_lookup(struct pci_dev *pci, const struct snd_pci_quirk *list); 436 437 const struct snd_pci_quirk * 438 snd_pci_quirk_lookup_id(u16 vendor, u16 device, 439 const struct snd_pci_quirk *list); 440 #else 441 static inline const struct snd_pci_quirk * 442 snd_pci_quirk_lookup(struct pci_dev *pci, const struct snd_pci_quirk *list) 443 { 444 return NULL; 445 } 446 447 static inline const struct snd_pci_quirk * 448 snd_pci_quirk_lookup_id(u16 vendor, u16 device, 449 const struct snd_pci_quirk *list) 450 { 451 return NULL; 452 } 453 #endif 454 455 #endif /* __SOUND_CORE_H */ 456