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         char *curr;             /* current position in buffer */
  31         unsigned long size;     /* current size */
  32         unsigned long len;      /* total length of buffer */
  33         int stop;               /* stop flag */
  34         int error;              /* error code */
  35 };
  36
  37 typedef struct snd_info_buffer snd_info_buffer_t;
  38
  39 #define SNDRV_INFO_CONTENT_TEXT         0
  40 #define SNDRV_INFO_CONTENT_DATA         1
  41
  42 struct snd_info_entry;
  43
  44 struct snd_info_entry_text {
  45         unsigned long read_size;
  46         unsigned long write_size;
  47         void (*read) (snd_info_entry_t *entry, snd_info_buffer_t * buffer);
  48         void (*write) (snd_info_entry_t *entry, snd_info_buffer_t * buffer);
  49 };
  50
  51 struct snd_info_entry_ops {
  52         int (*open) (snd_info_entry_t *entry,
  53                      unsigned short mode, void **file_private_data);
  54         int (*release) (snd_info_entry_t * entry,
  55                         unsigned short mode, void *file_private_data);
  56         long (*read) (snd_info_entry_t *entry, void *file_private_data,
  57                       struct file * file, char __user *buf,
  58                       unsigned long count, unsigned long pos);
  59         long (*write) (snd_info_entry_t *entry, void *file_private_data,
  60                        struct file * file, const char __user *buf,
  61                        unsigned long count, unsigned long pos);
  62         long long (*llseek) (snd_info_entry_t *entry, void *file_private_data,
  63                             struct file * file, long long offset, int orig);
  64         unsigned int (*poll) (snd_info_entry_t *entry, void *file_private_data,
  65                               struct file * file, poll_table * wait);
  66         int (*ioctl) (snd_info_entry_t *entry, void *file_private_data,
  67                       struct file * file, unsigned int cmd, unsigned long arg);
  68         int (*mmap) (snd_info_entry_t *entry, void *file_private_data,
  69                      struct inode * inode, struct file * file,
  70                      struct vm_area_struct * vma);
  71 };
  72
  73 struct snd_info_entry {
  74         const char *name;
  75         mode_t mode;
  76         long size;
  77         unsigned short content;
  78         unsigned short disconnected: 1;
  79         union {
  80                 struct snd_info_entry_text text;
  81                 struct snd_info_entry_ops *ops;
  82         } c;
  83         snd_info_entry_t *parent;
  84         snd_card_t *card;
  85         struct module *module;
  86         void *private_data;
  87         void (*private_free)(snd_info_entry_t *entry);
  88         struct proc_dir_entry *p;
  89         struct semaphore access;
  90 };
  91
  92 extern int snd_info_check_reserved_words(const char *str);
  93
  94 #if defined(CONFIG_SND_OSSEMUL) && defined(CONFIG_PROC_FS)
  95 extern int snd_info_minor_register(void);
  96 extern int snd_info_minor_unregister(void);
  97 #else
  98 #define snd_info_minor_register() /* NOP */
  99 #define snd_info_minor_unregister() /* NOP */
 100 #endif
 101
 102
 103 #ifdef CONFIG_PROC_FS
 104
 105 extern snd_info_entry_t *snd_seq_root;
 106 #ifdef CONFIG_SND_OSSEMUL
 107 extern snd_info_entry_t *snd_oss_root;
 108 #else
 109 #define snd_oss_root NULL
 110 #endif
 111
 112 int snd_iprintf(snd_info_buffer_t * buffer, char *fmt,...) __attribute__ ((format (printf, 2, 3)));
 113 int snd_info_init(void);
 114 int snd_info_done(void);
 115
 116 int snd_info_get_line(snd_info_buffer_t * buffer, char *line, int len);
 117 char *snd_info_get_str(char *dest, char *src, int len);
 118 snd_info_entry_t *snd_info_create_module_entry(struct module * module,
 119                                                const char *name,
 120                                                snd_info_entry_t * parent);
 121 snd_info_entry_t *snd_info_create_card_entry(snd_card_t * card,
 122                                              const char *name,
 123                                              snd_info_entry_t * parent);
 124 void snd_info_free_entry(snd_info_entry_t * entry);
 125 int snd_info_store_text(snd_info_entry_t * entry);
 126 int snd_info_restore_text(snd_info_entry_t * entry);
 127
 128 int snd_info_card_create(snd_card_t * card);
 129 int snd_info_card_register(snd_card_t * card);
 130 int snd_info_card_free(snd_card_t * card);
 131 int snd_info_register(snd_info_entry_t * entry);
 132 int snd_info_unregister(snd_info_entry_t * entry);
 133
 134 /* for card drivers */
 135 int snd_card_proc_new(snd_card_t *card, const char *name, snd_info_entry_t **entryp);
 136
 137 static inline void snd_info_set_text_ops(snd_info_entry_t *entry,
 138                                          void *private_data,
 139                                          long read_size,
 140                                          void (*read)(snd_info_entry_t *, snd_info_buffer_t *))
 141 {
 142         entry->private_data = private_data;
 143         entry->c.text.read_size = read_size;
 144         entry->c.text.read = read;
 145 }
 146
 147
 148 #else
 149
 150 #define snd_seq_root NULL
 151 #define snd_oss_root NULL
 152
 153 static inline int snd_iprintf(snd_info_buffer_t * buffer, char *fmt,...) { return 0; }
 154 static inline int snd_info_init(void) { return 0; }
 155 static inline int snd_info_done(void) { return 0; }
 156
 157 static inline int snd_info_get_line(snd_info_buffer_t * buffer, char *line, int len) { return 0; }
 158 static inline char *snd_info_get_str(char *dest, char *src, int len) { return NULL; }
 159 static inline snd_info_entry_t *snd_info_create_module_entry(struct module * module, const char *name, snd_info_entry_t * parent) { return NULL; }
 160 static inline snd_info_entry_t *snd_info_create_card_entry(snd_card_t * card, const char *name, snd_info_entry_t * parent) { return NULL; }
 161 static inline void snd_info_free_entry(snd_info_entry_t * entry) { ; }
 162
 163 static inline int snd_info_card_create(snd_card_t * card) { return 0; }
 164 static inline int snd_info_card_register(snd_card_t * card) { return 0; }
 165 static inline int snd_info_card_free(snd_card_t * card) { return 0; }
 166 static inline int snd_info_register(snd_info_entry_t * entry) { return 0; }
 167 static inline int snd_info_unregister(snd_info_entry_t * entry) { return 0; }
 168
 169 #define snd_card_proc_new(card,name,entryp)  0 /* always success */
 170 #define snd_info_set_text_ops(entry,private_data,read_size,read) /*NOP*/
 171
 172 #endif
 173
 174 /*
 175  * OSS info part
 176  */
 177
 178 #if defined(CONFIG_SND_OSSEMUL) && defined(CONFIG_PROC_FS)
 179
 180 #define SNDRV_OSS_INFO_DEV_AUDIO        0
 181 #define SNDRV_OSS_INFO_DEV_SYNTH        1
 182 #define SNDRV_OSS_INFO_DEV_MIDI         2
 183 #define SNDRV_OSS_INFO_DEV_TIMERS       4
 184 #define SNDRV_OSS_INFO_DEV_MIXERS       5
 185
 186 #define SNDRV_OSS_INFO_DEV_COUNT        6
 187
 188 extern int snd_oss_info_register(int dev, int num, char *string);
 189 #define snd_oss_info_unregister(dev, num) snd_oss_info_register(dev, num, NULL)
 190
 191 #endif /* CONFIG_SND_OSSEMUL && CONFIG_PROC_FS */
 192
 193 #endif /* __SOUND_INFO_H */