include/sound/info.h

   1 #ifndef __SOUND_INFO_H
   2 #define __SOUND_INFO_H
   3
   4 /*
   5  *  Header file for info interface
   6  *  Copyright (c) by Jaroslav Kysela <perex@suse.cz>
   7  *
   8  *
   9  *   This program is free software; you can redistribute it and/or modify
  10  *   it under the terms of the GNU General Public License as published by
  11  *   the Free Software Foundation; either version 2 of the License, or
  12  *   (at your option) any later version.
  13  *
  14  *   This program is distributed in the hope that it will be useful,
  15  *   but WITHOUT ANY WARRANTY; without even the implied warranty of
  16  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17  *   GNU General Public License for more details.
  18  *
  19  *   You should have received a copy of the GNU General Public License
  20  *   along with this program; if not, write to the Free Software
  21  *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
  22  *
  23  */
  24
  25 #include <linux/poll.h>
  26
  27 /* buffer for information */
  28 struct snd_info_buffer {
  29         char *buffer;           /* pointer to begin of buffer */
  30         unsigned int curr;      /* current position in buffer */
  31         unsigned int size;      /* current size */
  32         unsigned int len;       /* total length of buffer */
  33         int stop;               /* stop flag */
  34         int error;              /* error code */
  35 };
  36
  37 #define SNDRV_INFO_CONTENT_TEXT         0
  38 #define SNDRV_INFO_CONTENT_DATA         1
  39
  40 struct snd_info_entry;
  41
  42 struct snd_info_entry_text {
  43         void (*read) (struct snd_info_entry *entry, struct snd_info_buffer *buffer);
  44         void (*write) (struct snd_info_entry *entry, struct snd_info_buffer *buffer);
  45 };
  46
  47 struct snd_info_entry_ops {
  48         int (*open) (struct snd_info_entry *entry,
  49                      unsigned short mode, void **file_private_data);
  50         int (*release) (struct snd_info_entry * entry,
  51                         unsigned short mode, void *file_private_data);
  52         long (*read) (struct snd_info_entry *entry, void *file_private_data,
  53                       struct file * file, char __user *buf,
  54                       unsigned long count, unsigned long pos);
  55         long (*write) (struct snd_info_entry *entry, void *file_private_data,
  56                        struct file * file, const char __user *buf,
  57                        unsigned long count, unsigned long pos);
  58         long long (*llseek) (struct snd_info_entry *entry, void *file_private_data,
  59                             struct file * file, long long offset, int orig);
  60         unsigned int (*poll) (struct snd_info_entry *entry, void *file_private_data,
  61                               struct file * file, poll_table * wait);
  62         int (*ioctl) (struct snd_info_entry *entry, void *file_private_data,
  63                       struct file * file, unsigned int cmd, unsigned long arg);
  64         int (*mmap) (struct snd_info_entry *entry, void *file_private_data,
  65                      struct inode * inode, struct file * file,
  66                      struct vm_area_struct * vma);
  67 };
  68
  69 struct snd_info_entry {
  70         const char *name;
  71         mode_t mode;
  72         long size;
  73         unsigned short content;
  74         union {
  75                 struct snd_info_entry_text text;
  76                 struct snd_info_entry_ops *ops;
  77         } c;
  78         struct snd_info_entry *parent;
  79         struct snd_card *card;
  80         struct module *module;
  81         void *private_data;
  82         void (*private_free)(struct snd_info_entry *entry);
  83         struct proc_dir_entry *p;
  84         struct mutex access;
  85         struct list_head children;
  86         struct list_head list;
  87 };
  88
  89 #if defined(CONFIG_SND_OSSEMUL) && defined(CONFIG_PROC_FS)
  90 int snd_info_minor_register(void);
  91 int snd_info_minor_unregister(void);
  92 #else
  93 #define snd_info_minor_register() /* NOP */
  94 #define snd_info_minor_unregister() /* NOP */
  95 #endif
  96
  97
  98 #ifdef CONFIG_PROC_FS
  99
 100 extern struct snd_info_entry *snd_seq_root;
 101 #ifdef CONFIG_SND_OSSEMUL
 102 extern struct snd_info_entry *snd_oss_root;
 103 #else
 104 #define snd_oss_root NULL
 105 #endif
 106
 107 int snd_iprintf(struct snd_info_buffer * buffer, char *fmt,...) __attribute__ ((format (printf, 2, 3)));
 108 int snd_info_init(void);
 109 int snd_info_done(void);
 110
 111 int snd_info_get_line(struct snd_info_buffer * buffer, char *line, int len);
 112 char *snd_info_get_str(char *dest, char *src, int len);
 113 struct snd_info_entry *snd_info_create_module_entry(struct module * module,
 114                                                const char *name,
 115                                                struct snd_info_entry * parent);
 116 struct snd_info_entry *snd_info_create_card_entry(struct snd_card * card,
 117                                              const char *name,
 118                                              struct snd_info_entry * parent);
 119 void snd_info_free_entry(struct snd_info_entry * entry);
 120 int snd_info_store_text(struct snd_info_entry * entry);
 121 int snd_info_restore_text(struct snd_info_entry * entry);
 122
 123 int snd_info_card_create(struct snd_card * card);
 124 int snd_info_card_register(struct snd_card * card);
 125 int snd_info_card_free(struct snd_card * card);
 126 void snd_info_card_disconnect(struct snd_card * card);
 127 int snd_info_register(struct snd_info_entry * entry);
 128
 129 /* for card drivers */
 130 int snd_card_proc_new(struct snd_card *card, const char *name, struct snd_info_entry **entryp);
 131
 132 static inline void snd_info_set_text_ops(struct snd_info_entry *entry,
 133                                          void *private_data,
 134                                          void (*read)(struct snd_info_entry *, struct snd_info_buffer *))
 135 {
 136         entry->private_data = private_data;
 137         entry->c.text.read = read;
 138 }
 139
 140 int snd_info_check_reserved_words(const char *str);
 141
 142 #else
 143
 144 #define snd_seq_root NULL
 145 #define snd_oss_root NULL
 146
 147 static inline int snd_iprintf(struct snd_info_buffer * buffer, char *fmt,...) { return 0; }
 148 static inline int snd_info_init(void) { return 0; }
 149 static inline int snd_info_done(void) { return 0; }
 150
 151 static inline int snd_info_get_line(struct snd_info_buffer * buffer, char *line, int len) { return 0; }
 152 static inline char *snd_info_get_str(char *dest, char *src, int len) { return NULL; }
 153 static inline struct snd_info_entry *snd_info_create_module_entry(struct module * module, const char *name, struct snd_info_entry * parent) { return NULL; }
 154 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; }
 155 static inline void snd_info_free_entry(struct snd_info_entry * entry) { ; }
 156
 157 static inline int snd_info_card_create(struct snd_card * card) { return 0; }
 158 static inline int snd_info_card_register(struct snd_card * card) { return 0; }
 159 static inline int snd_info_card_free(struct snd_card * card) { return 0; }
 160 static inline void snd_info_card_disconnect(struct snd_card * card) { }
 161 static inline int snd_info_register(struct snd_info_entry * entry) { return 0; }
 162
 163 static inline int snd_card_proc_new(struct snd_card *card, const char *name,
 164                                     struct snd_info_entry **entryp) { return -EINVAL; }
 165 static inline void snd_info_set_text_ops(struct snd_info_entry *entry __attribute__((unused)),
 166                                          void *private_data,
 167                                          void (*read)(struct snd_info_entry *, struct snd_info_buffer *)) {}
 168
 169 static inline int snd_info_check_reserved_words(const char *str) { return 1; }
 170
 171 #endif
 172
 173 /*
 174  * OSS info part
 175  */
 176
 177 #if defined(CONFIG_SND_OSSEMUL) && defined(CONFIG_PROC_FS)
 178
 179 #define SNDRV_OSS_INFO_DEV_AUDIO        0
 180 #define SNDRV_OSS_INFO_DEV_SYNTH        1
 181 #define SNDRV_OSS_INFO_DEV_MIDI         2
 182 #define SNDRV_OSS_INFO_DEV_TIMERS       4
 183 #define SNDRV_OSS_INFO_DEV_MIXERS       5
 184
 185 #define SNDRV_OSS_INFO_DEV_COUNT        6
 186
 187 int snd_oss_info_register(int dev, int num, char *string);
 188 #define snd_oss_info_unregister(dev, num) snd_oss_info_register(dev, num, NULL)
 189
 190 #endif /* CONFIG_SND_OSSEMUL && CONFIG_PROC_FS */
 191
 192 #endif /* __SOUND_INFO_H */