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Linux kernel mirror (for testing) git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124125126127128129130131132133134135136137138139140141142143144145146147148149150151152153154155156157158159160161162163164165166167168169170171172173174175176177178179180181182183184185186187188189190191192193194195196197198199200201202203204205206207208209210211212213214215216217218219220221222223224225226227228229230231232233/* SPDX-License-Identifier: GPL-2.0-or-later */#ifndef __SOUND_INFO_H#define __SOUND_INFO_H
/* * Header file for info interface * Copyright (c) by Jaroslav Kysela <perex@perex.cz> */
#include <linux/poll.h>#include <linux/seq_file.h>#include <sound/core.h>
/* buffer for information */struct snd_info_buffer { char *buffer; /* pointer to begin of buffer */ unsigned int curr; /* current position in buffer */ unsigned int size; /* current size */ unsigned int len; /* total length of buffer */ int stop; /* stop flag */ int error; /* error code */};
#define SNDRV_INFO_CONTENT_TEXT 0#define SNDRV_INFO_CONTENT_DATA 1
struct snd_info_entry;
struct snd_info_entry_text { void (*read)(struct snd_info_entry *entry, struct snd_info_buffer *buffer); void (*write)(struct snd_info_entry *entry, struct snd_info_buffer *buffer);};
struct snd_info_entry_ops { int (*open)(struct snd_info_entry *entry, unsigned short mode, void **file_private_data); int (*release)(struct snd_info_entry *entry, unsigned short mode, void *file_private_data); ssize_t (*read)(struct snd_info_entry *entry, void *file_private_data, struct file *file, char __user *buf, size_t count, loff_t pos); ssize_t (*write)(struct snd_info_entry *entry, void *file_private_data, struct file *file, const char __user *buf, size_t count, loff_t pos); loff_t (*llseek)(struct snd_info_entry *entry, void *file_private_data, struct file *file, loff_t offset, int orig); __poll_t (*poll)(struct snd_info_entry *entry, void *file_private_data, struct file *file, poll_table *wait); int (*ioctl)(struct snd_info_entry *entry, void *file_private_data, struct file *file, unsigned int cmd, unsigned long arg); int (*mmap)(struct snd_info_entry *entry, void *file_private_data, struct inode *inode, struct file *file, struct vm_area_struct *vma);};
struct snd_info_entry { const char *name; umode_t mode; long size; unsigned short content; union { struct snd_info_entry_text text; const struct snd_info_entry_ops *ops; } c; struct snd_info_entry *parent; struct module *module; void *private_data; void (*private_free)(struct snd_info_entry *entry); struct proc_dir_entry *p; struct mutex access; struct list_head children; struct list_head list;};
#if defined(CONFIG_SND_OSSEMUL) && defined(CONFIG_SND_PROC_FS)int snd_info_minor_register(void);#else#define snd_info_minor_register() 0#endif
#ifdef CONFIG_SND_PROC_FS
extern struct snd_info_entry *snd_seq_root;#ifdef CONFIG_SND_OSSEMULextern struct snd_info_entry *snd_oss_root;void snd_card_info_read_oss(struct snd_info_buffer *buffer);#else#define snd_oss_root NULLstatic inline void snd_card_info_read_oss(struct snd_info_buffer *buffer) {}#endif
/** * snd_iprintf - printf on the procfs buffer * @buf: the procfs buffer * @fmt: the printf format * * Outputs the string on the procfs buffer just like printf(). * * Return: zero for success, or a negative error code. */#define snd_iprintf(buf, fmt, args...) \ seq_printf((struct seq_file *)(buf)->buffer, fmt, ##args)
int snd_info_init(void);int snd_info_done(void);
int snd_info_get_line(struct snd_info_buffer *buffer, char *line, int len);const char *snd_info_get_str(char *dest, const char *src, int len);struct snd_info_entry *snd_info_create_module_entry(struct module *module, const char *name, struct snd_info_entry *parent);struct snd_info_entry *snd_info_create_card_entry(struct snd_card *card, const char *name, struct snd_info_entry *parent);void snd_info_free_entry(struct snd_info_entry *entry);
int snd_info_card_create(struct snd_card *card);int snd_info_card_register(struct snd_card *card);int snd_info_card_free(struct snd_card *card);void snd_info_card_disconnect(struct snd_card *card);void snd_info_card_id_change(struct snd_card *card);int snd_info_register(struct snd_info_entry *entry);
/* for card drivers */static inline int snd_card_proc_new(struct snd_card *card, const char *name, struct snd_info_entry **entryp){ *entryp = snd_info_create_card_entry(card, name, card->proc_root); return *entryp ? 0 : -ENOMEM;}
static inline void snd_info_set_text_ops(struct snd_info_entry *entry, void *private_data, void (*read)(struct snd_info_entry *, struct snd_info_buffer *)){ entry->private_data = private_data; entry->c.text.read = read;}
int snd_card_rw_proc_new(struct snd_card *card, const char *name, void *private_data, void (*read)(struct snd_info_entry *, struct snd_info_buffer *), void (*write)(struct snd_info_entry *entry, struct snd_info_buffer *buffer));
int snd_info_check_reserved_words(const char *str);
#else
#define snd_seq_root NULL#define snd_oss_root NULL
static inline int snd_iprintf(struct snd_info_buffer *buffer, char *fmt, ...) { return 0; }static inline int snd_info_init(void) { return 0; }static inline int snd_info_done(void) { return 0; }
static inline int snd_info_get_line(struct snd_info_buffer *buffer, char *line, int len) { return 0; }static inline char *snd_info_get_str(char *dest, char *src, int len) { return NULL; }static inline struct snd_info_entry *snd_info_create_module_entry(struct module *module, const char *name, struct snd_info_entry *parent) { return NULL; }static inline struct snd_info_entry *snd_info_create_card_entry(struct snd_card *card, const char *name, struct snd_info_entry *parent) { return NULL; }static inline void snd_info_free_entry(struct snd_info_entry *entry) { ; }
static inline int snd_info_card_create(struct snd_card *card) { return 0; }static inline int snd_info_card_register(struct snd_card *card) { return 0; }static inline int snd_info_card_free(struct snd_card *card) { return 0; }static inline void snd_info_card_disconnect(struct snd_card *card) { }static inline void snd_info_card_id_change(struct snd_card *card) { }static inline int snd_info_register(struct snd_info_entry *entry) { return 0; }
static inline int snd_card_proc_new(struct snd_card *card, const char *name, struct snd_info_entry **entryp) { return -EINVAL; }static inline void snd_info_set_text_ops(struct snd_info_entry *entry __attribute__((unused)), void *private_data, void (*read)(struct snd_info_entry *, struct snd_info_buffer *)) {}static inline int snd_card_rw_proc_new(struct snd_card *card, const char *name, void *private_data, void (*read)(struct snd_info_entry *, struct snd_info_buffer *), void (*write)(struct snd_info_entry *entry, struct snd_info_buffer *buffer)){ return 0;}static inline int snd_info_check_reserved_words(const char *str) { return 1; }
#endif
/** * snd_card_ro_proc_new - Create a read-only text proc file entry for the card * @card: the card instance * @name: the file name * @private_data: the arbitrary private data * @read: the read callback * * This proc file entry will be registered via snd_card_register() call, and * it will be removed automatically at the card removal, too. */static inline intsnd_card_ro_proc_new(struct snd_card *card, const char *name, void *private_data, void (*read)(struct snd_info_entry *, struct snd_info_buffer *)){ return snd_card_rw_proc_new(card, name, private_data, read, NULL);}
/* * OSS info part */
#if defined(CONFIG_SND_OSSEMUL) && defined(CONFIG_SND_PROC_FS)
#define SNDRV_OSS_INFO_DEV_AUDIO 0#define SNDRV_OSS_INFO_DEV_SYNTH 1#define SNDRV_OSS_INFO_DEV_MIDI 2#define SNDRV_OSS_INFO_DEV_TIMERS 4#define SNDRV_OSS_INFO_DEV_MIXERS 5
#define SNDRV_OSS_INFO_DEV_COUNT 6
int snd_oss_info_register(int dev, int num, char *string);#define snd_oss_info_unregister(dev, num) snd_oss_info_register(dev, num, NULL)
#endif /* CONFIG_SND_OSSEMUL && CONFIG_SND_PROC_FS */
#endif /* __SOUND_INFO_H */