519 строки
16 KiB
C
519 строки
16 KiB
C
/* SPDX-License-Identifier: GPL-2.0-or-later */
|
|
#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>
|
|
*/
|
|
|
|
#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>
|
|
#include <linux/xarray.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_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,
|
|
SNDRV_DEV_CONTROL, /* NOTE: this must be the last one */
|
|
};
|
|
|
|
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 */
|
|
const 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 lock (list and values) */
|
|
rwlock_t ctl_files_rwlock; /* ctl_files list lock */
|
|
int controls_count; /* count of all controls */
|
|
size_t user_ctl_alloc_size; // current memory allocation by user controls.
|
|
struct list_head controls; /* all controls for this card */
|
|
struct list_head ctl_files; /* active control files */
|
|
#ifdef CONFIG_SND_CTL_FAST_LOOKUP
|
|
struct xarray ctl_numids; /* hash table for numids */
|
|
struct xarray ctl_hash; /* hash table for ctl id matching */
|
|
bool ctl_hash_collision; /* ctl_hash collision seen? */
|
|
#endif
|
|
|
|
struct snd_info_entry *proc_root; /* root for soundcard specific files */
|
|
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? */
|
|
bool managed; /* managed via devres */
|
|
bool releasing; /* during card free process */
|
|
int sync_irq; /* assigned irq, used for PCM sync */
|
|
wait_queue_head_t remove_sleep;
|
|
|
|
size_t total_pcm_alloc_bytes; /* total amount of allocated buffers */
|
|
struct mutex memory_mutex; /* protection for the above */
|
|
#ifdef CONFIG_SND_DEBUG
|
|
struct dentry *debugfs_root; /* debugfs root for card */
|
|
#endif
|
|
|
|
#ifdef CONFIG_PM
|
|
unsigned int power_state; /* power state */
|
|
atomic_t power_ref;
|
|
wait_queue_head_t power_sleep;
|
|
wait_queue_head_t power_ref_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 READ_ONCE(card->power_state);
|
|
}
|
|
|
|
static inline void snd_power_change_state(struct snd_card *card, unsigned int state)
|
|
{
|
|
WRITE_ONCE(card->power_state, state);
|
|
wake_up(&card->power_sleep);
|
|
}
|
|
|
|
/**
|
|
* snd_power_ref - Take the reference count for power control
|
|
* @card: sound card object
|
|
*
|
|
* The power_ref reference of the card is used for managing to block
|
|
* the snd_power_sync_ref() operation. This function increments the reference.
|
|
* The counterpart snd_power_unref() has to be called appropriately later.
|
|
*/
|
|
static inline void snd_power_ref(struct snd_card *card)
|
|
{
|
|
atomic_inc(&card->power_ref);
|
|
}
|
|
|
|
/**
|
|
* snd_power_unref - Release the reference count for power control
|
|
* @card: sound card object
|
|
*/
|
|
static inline void snd_power_unref(struct snd_card *card)
|
|
{
|
|
if (atomic_dec_and_test(&card->power_ref))
|
|
wake_up(&card->power_ref_sleep);
|
|
}
|
|
|
|
/**
|
|
* snd_power_sync_ref - wait until the card power_ref is freed
|
|
* @card: sound card object
|
|
*
|
|
* This function is used to synchronize with the pending power_ref being
|
|
* released.
|
|
*/
|
|
static inline void snd_power_sync_ref(struct snd_card *card)
|
|
{
|
|
wait_event(card->power_ref_sleep, !atomic_read(&card->power_ref));
|
|
}
|
|
|
|
/* init.c */
|
|
int snd_power_wait(struct snd_card *card);
|
|
int snd_power_ref_and_wait(struct snd_card *card);
|
|
|
|
#else /* ! CONFIG_PM */
|
|
|
|
static inline int snd_power_wait(struct snd_card *card) { return 0; }
|
|
static inline void snd_power_ref(struct snd_card *card) {}
|
|
static inline void snd_power_unref(struct snd_card *card) {}
|
|
static inline int snd_power_ref_and_wait(struct snd_card *card) { return 0; }
|
|
static inline void snd_power_sync_ref(struct snd_card *card) {}
|
|
#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;
|
|
}
|
|
|
|
/* sound.c */
|
|
|
|
extern int snd_major;
|
|
extern int snd_ecards_limit;
|
|
extern const struct class sound_class;
|
|
#ifdef CONFIG_SND_DEBUG
|
|
extern struct dentry *sound_debugfs_root;
|
|
#endif
|
|
|
|
void snd_request_card(int card);
|
|
|
|
int snd_device_alloc(struct device **dev_p, 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; }
|
|
#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 */
|
|
|
|
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_devm_card_new(struct device *parent, int idx, const char *xid,
|
|
struct module *module, size_t extra_size,
|
|
struct snd_card **card_ret);
|
|
|
|
void snd_card_disconnect(struct snd_card *card);
|
|
void snd_card_disconnect_sync(struct snd_card *card);
|
|
void snd_card_free(struct snd_card *card);
|
|
void snd_card_free_when_closed(struct snd_card *card);
|
|
int snd_card_free_on_error(struct device *dev, int ret);
|
|
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);
|
|
|
|
struct snd_card *snd_card_ref(int card);
|
|
|
|
/**
|
|
* snd_card_unref - Unreference the card object
|
|
* @card: the card object to unreference
|
|
*
|
|
* Call this function for the card object that was obtained via snd_card_ref()
|
|
* or snd_lookup_minor_data().
|
|
*/
|
|
static inline void snd_card_unref(struct snd_card *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, const 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);
|
|
int snd_device_get_state(struct snd_card *card, void *device_data);
|
|
|
|
/* 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);
|
|
int snd_devm_request_dma(struct device *dev, int dma, const char *name);
|
|
#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")
|
|
|
|
/**
|
|
* snd_printd_ratelimit - 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, ...) {}
|
|
__printf(2, 3)
|
|
static inline void _snd_printd(int level, const char *format, ...) {}
|
|
|
|
#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; }
|
|
|
|
#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, ...) {}
|
|
#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;
|
|
}
|
|
|
|
static inline const struct snd_pci_quirk *
|
|
snd_pci_quirk_lookup_id(u16 vendor, u16 device,
|
|
const struct snd_pci_quirk *list)
|
|
{
|
|
return NULL;
|
|
}
|
|
#endif
|
|
|
|
/* async signal helpers */
|
|
struct snd_fasync;
|
|
|
|
int snd_fasync_helper(int fd, struct file *file, int on,
|
|
struct snd_fasync **fasyncp);
|
|
void snd_kill_fasync(struct snd_fasync *fasync, int signal, int poll);
|
|
void snd_fasync_free(struct snd_fasync *fasync);
|
|
|
|
#endif /* __SOUND_CORE_H */
|