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info.h

#ifndef __SOUND_INFO_H
#define __SOUND_INFO_H

/*
 *  Header file for info interface
 *  Copyright (c) by Jaroslav Kysela <perex@suse.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/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);
      long (*read) (struct snd_info_entry *entry, void *file_private_data,
                  struct file * file, char __user *buf,
                  unsigned long count, unsigned long pos);
      long (*write) (struct snd_info_entry *entry, void *file_private_data,
                   struct file * file, const char __user *buf,
                   unsigned long count, unsigned long pos);
      long long (*llseek) (struct snd_info_entry *entry, void *file_private_data,
                      struct file * file, long long 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;
      mode_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;
#else
#define snd_oss_root NULL
#endif

int snd_iprintf(struct snd_info_buffer * buffer, char *fmt,...) __attribute__ ((format (printf, 2, 3)));
int snd_info_init(void);
int snd_info_done(void);

int snd_info_get_line(struct snd_info_buffer * buffer, char *line, int len);
char *snd_info_get_str(char *dest, 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);
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 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 */

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