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Release 4.14 include/sound/core.h

Directory: include/sound
#ifndef __SOUND_CORE_H

#define __SOUND_CORE_H

/*
 *  Main header file for the ALSA driver
 *  Copyright (c) 1994-2001 by Jaroslav Kysela <perex@perex.cz>
 *
 *
 *   This program is free software; you can redistribute it and/or modify
 *   it under the terms of the GNU General Public License as published by
 *   the Free Software Foundation; either version 2 of the License, or
 *   (at your option) any later version.
 *
 *   This program is distributed in the hope that it will be useful,
 *   but WITHOUT ANY WARRANTY; without even the implied warranty of
 *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *   GNU General Public License for more details.
 *
 *   You should have received a copy of the GNU General Public License
 *   along with this program; if not, write to the Free Software
 *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
 *
 */

#include <linux/device.h>
#include <linux/sched.h>		/* wake_up() */
#include <linux/mutex.h>		/* struct mutex */
#include <linux/rwsem.h>		/* struct rw_semaphore */
#include <linux/pm.h>			/* pm_message_t */
#include <linux/stringify.h>
#include <linux/printk.h>

/* number of supported soundcards */
#ifdef CONFIG_SND_DYNAMIC_MINORS

#define SNDRV_CARDS CONFIG_SND_MAX_CARDS
#else

#define SNDRV_CARDS 8		
/* don't change - minor numbers */
#endif


#define CONFIG_SND_MAJOR	116	
/* standard configuration */

/* forward declarations */
struct pci_dev;
struct module;
struct completion;

/* device allocation stuff */

/* type of the object used in snd_device_*()
 * this also defines the calling order
 */

enum snd_device_type {
	
SNDRV_DEV_LOWLEVEL,
	
SNDRV_DEV_CONTROL,
	
SNDRV_DEV_INFO,
	
SNDRV_DEV_BUS,
	
SNDRV_DEV_CODEC,
	
SNDRV_DEV_PCM,
	
SNDRV_DEV_COMPRESS,
	
SNDRV_DEV_RAWMIDI,
	
SNDRV_DEV_TIMER,
	
SNDRV_DEV_SEQUENCER,
	
SNDRV_DEV_HWDEP,
	
SNDRV_DEV_JACK,
};


enum snd_device_state {
	
SNDRV_DEV_BUILD,
	
SNDRV_DEV_REGISTERED,
	
SNDRV_DEV_DISCONNECTED,
};

struct snd_device;


struct snd_device_ops {
	
int (*dev_free)(struct snd_device *dev);
	
int (*dev_register)(struct snd_device *dev);
	
int (*dev_disconnect)(struct snd_device *dev);
};


struct snd_device {
	
struct list_head list;		/* list of registered devices */
	
struct snd_card *card;		/* card which holds this device */
	
enum snd_device_state state;	/* state of the device */
	
enum snd_device_type type;	/* device type */
	
void *device_data;		/* device structure */
	
struct snd_device_ops *ops;	/* operations */
};


#define snd_device(n) list_entry(n, struct snd_device, list)

/* main structure for soundcard */


struct snd_card {
	
int number;			/* number of soundcard (index to
                                                                snd_cards) */

	
char id[16];			/* id string of this card */
	
char driver[16];		/* driver name */
	
char shortname[32];		/* short name of this soundcard */
	
char longname[80];		/* name of this soundcard */
	
char irq_descr[32];		/* Interrupt description */
	
char mixername[80];		/* mixer name */
	
char components[128];		/* card components delimited with
                                                                space */
	
struct module *module;		/* top-level module */

	
void *private_data;		/* private data for soundcard */
	
void (*private_free) (struct snd_card *card); /* callback for freeing of
                                                                private data */
	
struct list_head devices;	/* devices */

	
struct device ctl_dev;		/* control device */
	
unsigned int last_numid;	/* last used numeric ID */
	
struct rw_semaphore controls_rwsem;	/* controls list lock */
	
rwlock_t ctl_files_rwlock;	/* ctl_files list lock */
	
int controls_count;		/* count of all controls */
	
int user_ctl_count;		/* count of all user controls */
	
struct list_head controls;	/* all controls for this card */
	
struct list_head ctl_files;	/* active control files */

	
struct snd_info_entry *proc_root;	/* root for soundcard specific files */
	
struct snd_info_entry *proc_id;	/* the card id */
	
struct proc_dir_entry *proc_root_link;	/* number link to real id */

	
struct list_head files_list;	/* all files associated to this card */
	
struct snd_shutdown_f_ops *s_f_ops; /* file operations in the shutdown
                                                                state */
	
spinlock_t files_lock;		/* lock the files for this card */
	
int shutdown;			/* this card is going down */
	
struct completion *release_completion;
	
struct device *dev;		/* device assigned to this card */
	
struct device card_dev;		/* cardX object for sysfs */
	
const struct attribute_group *dev_groups[4]; /* assigned sysfs attr */
	
bool registered;		/* card_dev is registered? */

#ifdef CONFIG_PM
	
unsigned int power_state;	/* power state */
	
wait_queue_head_t power_sleep;
#endif

#if IS_ENABLED(CONFIG_SND_MIXER_OSS)
	
struct snd_mixer_oss *mixer_oss;
	
int mixer_oss_change_count;
#endif
};


#define dev_to_snd_card(p)	container_of(p, struct snd_card, card_dev)

#ifdef CONFIG_PM

static inline unsigned int snd_power_get_state(struct snd_card *card) { return card->power_state; }

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static inline void snd_power_change_state(struct snd_card *card, unsigned int state) { card->power_state = state; wake_up(&card->power_sleep); }

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/* init.c */ int snd_power_wait(struct snd_card *card, unsigned int power_state); #else /* ! CONFIG_PM */
static inline int snd_power_wait(struct snd_card *card, unsigned int state) { return 0; }

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#define snd_power_get_state(card) ({ (void)(card); SNDRV_CTL_POWER_D0; }) #define snd_power_change_state(card, state) do { (void)(card); } while (0) #endif /* CONFIG_PM */ struct snd_minor { int type; /* SNDRV_DEVICE_TYPE_XXX */ int card; /* card number */ int device; /* device number */ const struct file_operations *f_ops; /* file operations */ void *private_data; /* private data for f_ops->open */ struct device *dev; /* device for sysfs */ struct snd_card *card_ptr; /* assigned card instance */ }; /* return a device pointer linked to each sound device as a parent */
static inline struct device *snd_card_get_device_link(struct snd_card *card) { return card ? &card->card_dev : NULL; }

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/* sound.c */ extern int snd_major; extern int snd_ecards_limit; extern struct class *sound_class; void snd_request_card(int card); void snd_device_initialize(struct device *dev, struct snd_card *card); int snd_register_device(int type, struct snd_card *card, int dev, const struct file_operations *f_ops, void *private_data, struct device *device); int snd_unregister_device(struct device *dev); void *snd_lookup_minor_data(unsigned int minor, int type); #ifdef CONFIG_SND_OSSEMUL int snd_register_oss_device(int type, struct snd_card *card, int dev, const struct file_operations *f_ops, void *private_data); int snd_unregister_oss_device(int type, struct snd_card *card, int dev); void *snd_lookup_oss_minor_data(unsigned int minor, int type); #endif int snd_minor_info_init(void); /* sound_oss.c */ #ifdef CONFIG_SND_OSSEMUL int snd_minor_info_oss_init(void); #else
static inline int snd_minor_info_oss_init(void) { return 0; }

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#endif /* memory.c */ int copy_to_user_fromio(void __user *dst, const volatile void __iomem *src, size_t count); int copy_from_user_toio(volatile void __iomem *dst, const void __user *src, size_t count); /* init.c */ extern struct snd_card *snd_cards[SNDRV_CARDS]; int snd_card_locked(int card); #if IS_ENABLED(CONFIG_SND_MIXER_OSS) #define SND_MIXER_OSS_NOTIFY_REGISTER 0 #define SND_MIXER_OSS_NOTIFY_DISCONNECT 1 #define SND_MIXER_OSS_NOTIFY_FREE 2 extern int (*snd_mixer_oss_notify_callback)(struct snd_card *card, int cmd); #endif int snd_card_new(struct device *parent, int idx, const char *xid, struct module *module, int extra_size, struct snd_card **card_ret); int snd_card_disconnect(struct snd_card *card); int snd_card_free(struct snd_card *card); int snd_card_free_when_closed(struct snd_card *card); void snd_card_set_id(struct snd_card *card, const char *id); int snd_card_register(struct snd_card *card); int snd_card_info_init(void); int snd_card_add_dev_attr(struct snd_card *card, const struct attribute_group *group); int snd_component_add(struct snd_card *card, const char *component); int snd_card_file_add(struct snd_card *card, struct file *file); int snd_card_file_remove(struct snd_card *card, struct file *file); #define snd_card_unref(card) put_device(&(card)->card_dev) #define snd_card_set_dev(card, devptr) ((card)->dev = (devptr)) /* device.c */ int snd_device_new(struct snd_card *card, enum snd_device_type type, void *device_data, struct snd_device_ops *ops); int snd_device_register(struct snd_card *card, void *device_data); int snd_device_register_all(struct snd_card *card); void snd_device_disconnect(struct snd_card *card, void *device_data); void snd_device_disconnect_all(struct snd_card *card); void snd_device_free(struct snd_card *card, void *device_data); void snd_device_free_all(struct snd_card *card); /* isadma.c */ #ifdef CONFIG_ISA_DMA_API #define DMA_MODE_NO_ENABLE 0x0100 void snd_dma_program(unsigned long dma, unsigned long addr, unsigned int size, unsigned short mode); void snd_dma_disable(unsigned long dma); unsigned int snd_dma_pointer(unsigned long dma, unsigned int size); #endif /* misc.c */ struct resource; void release_and_free_resource(struct resource *res); /* --- */ /* sound printk debug levels */ enum { SND_PR_ALWAYS, SND_PR_DEBUG, SND_PR_VERBOSE, }; #if defined(CONFIG_SND_DEBUG) || defined(CONFIG_SND_VERBOSE_PRINTK) __printf(4, 5) void __snd_printk(unsigned int level, const char *file, int line, const char *format, ...); #else #define __snd_printk(level, file, line, format, ...) \ printk(format, ##__VA_ARGS__) #endif /** * snd_printk - printk wrapper * @fmt: format string * * Works like printk() but prints the file and the line of the caller * when configured with CONFIG_SND_VERBOSE_PRINTK. */ #define snd_printk(fmt, ...) \ __snd_printk(0, __FILE__, __LINE__, fmt, ##__VA_ARGS__) #ifdef CONFIG_SND_DEBUG /** * snd_printd - debug printk * @fmt: format string * * Works like snd_printk() for debugging purposes. * Ignored when CONFIG_SND_DEBUG is not set. */ #define snd_printd(fmt, ...) \ __snd_printk(1, __FILE__, __LINE__, fmt, ##__VA_ARGS__) #define _snd_printd(level, fmt, ...) \ __snd_printk(level, __FILE__, __LINE__, fmt, ##__VA_ARGS__) /** * snd_BUG - give a BUG warning message and stack trace * * Calls WARN() if CONFIG_SND_DEBUG is set. * Ignored when CONFIG_SND_DEBUG is not set. */ #define snd_BUG() WARN(1, "BUG?\n") /** * Suppress high rates of output when CONFIG_SND_DEBUG is enabled. */ #define snd_printd_ratelimit() printk_ratelimit() /** * snd_BUG_ON - debugging check macro * @cond: condition to evaluate * * Has the same behavior as WARN_ON when CONFIG_SND_DEBUG is set, * otherwise just evaluates the conditional and returns the value. */ #define snd_BUG_ON(cond) WARN_ON((cond)) #else /* !CONFIG_SND_DEBUG */ __printf(1, 2)
static inline void snd_printd(const char *format, ...) {}

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__printf(2, 3)
static inline void _snd_printd(int level, const char *format, ...) {}

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#define snd_BUG() do { } while (0) #define snd_BUG_ON(condition) ({ \ int __ret_warn_on = !!(condition); \ unlikely(__ret_warn_on); \ })
static inline bool snd_printd_ratelimit(void) { return false; }

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#endif /* CONFIG_SND_DEBUG */ #ifdef CONFIG_SND_DEBUG_VERBOSE /** * snd_printdd - debug printk * @format: format string * * Works like snd_printk() for debugging purposes. * Ignored when CONFIG_SND_DEBUG_VERBOSE is not set. */ #define snd_printdd(format, ...) \ __snd_printk(2, __FILE__, __LINE__, format, ##__VA_ARGS__) #else __printf(1, 2)
static inline void snd_printdd(const char *format, ...) {}

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#endif #define SNDRV_OSS_VERSION ((3<<16)|(8<<8)|(1<<4)|(0)) /* 3.8.1a */ /* for easier backward-porting */ #if IS_ENABLED(CONFIG_GAMEPORT) #define gameport_set_dev_parent(gp,xdev) ((gp)->dev.parent = (xdev)) #define gameport_set_port_data(gp,r) ((gp)->port_data = (r)) #define gameport_get_port_data(gp) (gp)->port_data #endif /* PCI quirk list helper */ struct snd_pci_quirk { unsigned short subvendor; /* PCI subvendor ID */ unsigned short subdevice; /* PCI subdevice ID */ unsigned short subdevice_mask; /* bitmask to match */ int value; /* value */ #ifdef CONFIG_SND_DEBUG_VERBOSE const char *name; /* name of the device (optional) */ #endif }; #define _SND_PCI_QUIRK_ID_MASK(vend, mask, dev) \ .subvendor = (vend), .subdevice = (dev), .subdevice_mask = (mask) #define _SND_PCI_QUIRK_ID(vend, dev) \ _SND_PCI_QUIRK_ID_MASK(vend, 0xffff, dev) #define SND_PCI_QUIRK_ID(vend,dev) {_SND_PCI_QUIRK_ID(vend, dev)} #ifdef CONFIG_SND_DEBUG_VERBOSE #define SND_PCI_QUIRK(vend,dev,xname,val) \ {_SND_PCI_QUIRK_ID(vend, dev), .value = (val), .name = (xname)} #define SND_PCI_QUIRK_VENDOR(vend, xname, val) \ {_SND_PCI_QUIRK_ID_MASK(vend, 0, 0), .value = (val), .name = (xname)} #define SND_PCI_QUIRK_MASK(vend, mask, dev, xname, val) \ {_SND_PCI_QUIRK_ID_MASK(vend, mask, dev), \ .value = (val), .name = (xname)} #define snd_pci_quirk_name(q) ((q)->name) #else #define SND_PCI_QUIRK(vend,dev,xname,val) \ {_SND_PCI_QUIRK_ID(vend, dev), .value = (val)} #define SND_PCI_QUIRK_MASK(vend, mask, dev, xname, val) \ {_SND_PCI_QUIRK_ID_MASK(vend, mask, dev), .value = (val)} #define SND_PCI_QUIRK_VENDOR(vend, xname, val) \ {_SND_PCI_QUIRK_ID_MASK(vend, 0, 0), .value = (val)} #define snd_pci_quirk_name(q) "" #endif #ifdef CONFIG_PCI const struct snd_pci_quirk * snd_pci_quirk_lookup(struct pci_dev *pci, const struct snd_pci_quirk *list); const struct snd_pci_quirk * snd_pci_quirk_lookup_id(u16 vendor, u16 device, const struct snd_pci_quirk *list); #else
static inline const struct snd_pci_quirk * snd_pci_quirk_lookup(struct pci_dev *pci, const struct snd_pci_quirk *list) { return NULL; }

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static inline const struct snd_pci_quirk * snd_pci_quirk_lookup_id(u16 vendor, u16 device, const struct snd_pci_quirk *list) { return NULL; }

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#endif #endif /* __SOUND_CORE_H */

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Fengguang Wu281.63%11.15%
Tim Gardner211.22%11.15%
Greg Kroah-Hartman160.93%22.30%
Henrik Kretzschmar160.93%11.15%
Pavel Machek110.64%11.15%
Linus Torvalds80.47%11.15%
Heiner Kallweit70.41%11.15%
Al Viro70.41%22.30%
Joe Perches70.41%11.15%
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Arjan van de Ven30.17%11.15%
Paul Gortmaker30.17%11.15%
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Axel Lin20.12%11.15%
Mark Brown10.06%11.15%
Robert Love10.06%11.15%
Andrew Morton10.06%11.15%
Mike Frysinger10.06%11.15%
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Directory: include/sound
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