#ifndef __SOUND_INFO_H
#define __SOUND_INFO_H

/*
* Header file for info interface
* Copyright (c) by Jaroslav Kysela <[email protected]>
*
*
* 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/poll.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);
unsigned int (*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;
struct snd_info_entry_ops *ops;
} c;
struct snd_info_entry *parent;
struct snd_card *card;
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_PROC_FS)
int snd_info_minor_register(void);
int snd_info_minor_unregister(void);
#else
#define snd_info_minor_register() /* NOP */
#define snd_info_minor_unregister() /* NOP */
#endif


#ifdef CONFIG_PROC_FS

extern struct snd_info_entry *snd_seq_root;
#ifdef CONFIG_SND_OSSEMUL
extern struct snd_info_entry *snd_oss_root;
void snd_card_info_read_oss(struct snd_info_buffer *buffer);
#else
#define snd_oss_root NULL
static inline void snd_card_info_read_oss(struct snd_info_buffer *buffer) {}
#endif

__printf(2, 3)
int snd_iprintf(struct snd_info_buffer *buffer, const char *fmt, ...);
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_store_text(struct snd_info_entry *entry);
int snd_info_restore_text(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 */
int snd_card_proc_new(struct snd_card *card, const char *name,
struct snd_info_entry **entryp);

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_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_info_check_reserved_words(const char *str) { return 1; }

#endif

/*
* OSS info part
*/

#if defined(CONFIG_SND_OSSEMUL) && defined(CONFIG_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_PROC_FS */

#endif /* __SOUND_INFO_H */