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TOMOYO Linux Cross Reference
Linux/include/sound/info.h

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  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@perex.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,
 44                      struct snd_info_buffer *buffer);
 45         void (*write)(struct snd_info_entry *entry,
 46                       struct snd_info_buffer *buffer);
 47 };
 48 
 49 struct snd_info_entry_ops {
 50         int (*open)(struct snd_info_entry *entry,
 51                     unsigned short mode, void **file_private_data);
 52         int (*release)(struct snd_info_entry *entry,
 53                        unsigned short mode, void *file_private_data);
 54         ssize_t (*read)(struct snd_info_entry *entry, void *file_private_data,
 55                         struct file *file, char __user *buf,
 56                         size_t count, loff_t pos);
 57         ssize_t (*write)(struct snd_info_entry *entry, void *file_private_data,
 58                          struct file *file, const char __user *buf,
 59                          size_t count, loff_t pos);
 60         loff_t (*llseek)(struct snd_info_entry *entry,
 61                          void *file_private_data, struct file *file,
 62                          loff_t offset, int orig);
 63         unsigned int (*poll)(struct snd_info_entry *entry,
 64                              void *file_private_data, struct file *file,
 65                              poll_table *wait);
 66         int (*ioctl)(struct snd_info_entry *entry, void *file_private_data,
 67                      struct file *file, unsigned int cmd, unsigned long arg);
 68         int (*mmap)(struct snd_info_entry *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         umode_t mode;
 76         long size;
 77         unsigned short content;
 78         union {
 79                 struct snd_info_entry_text text;
 80                 struct snd_info_entry_ops *ops;
 81         } c;
 82         struct snd_info_entry *parent;
 83         struct snd_card *card;
 84         struct module *module;
 85         void *private_data;
 86         void (*private_free)(struct snd_info_entry *entry);
 87         struct proc_dir_entry *p;
 88         struct mutex access;
 89         struct list_head children;
 90         struct list_head list;
 91 };
 92 
 93 #if defined(CONFIG_SND_OSSEMUL) && defined(CONFIG_PROC_FS)
 94 int snd_info_minor_register(void);
 95 int snd_info_minor_unregister(void);
 96 #else
 97 #define snd_info_minor_register() /* NOP */
 98 #define snd_info_minor_unregister() /* NOP */
 99 #endif
100 
101 
102 #ifdef CONFIG_PROC_FS
103 
104 extern struct snd_info_entry *snd_seq_root;
105 #ifdef CONFIG_SND_OSSEMUL
106 extern struct snd_info_entry *snd_oss_root;
107 void snd_card_info_read_oss(struct snd_info_buffer *buffer);
108 #else
109 #define snd_oss_root NULL
110 static inline void snd_card_info_read_oss(struct snd_info_buffer *buffer) {}
111 #endif
112 
113 __printf(2, 3)
114 int snd_iprintf(struct snd_info_buffer *buffer, const char *fmt, ...);
115 int snd_info_init(void);
116 int snd_info_done(void);
117 
118 int snd_info_get_line(struct snd_info_buffer *buffer, char *line, int len);
119 const char *snd_info_get_str(char *dest, const char *src, int len);
120 struct snd_info_entry *snd_info_create_module_entry(struct module *module,
121                                                const char *name,
122                                                struct snd_info_entry *parent);
123 struct snd_info_entry *snd_info_create_card_entry(struct snd_card *card,
124                                              const char *name,
125                                              struct snd_info_entry *parent);
126 void snd_info_free_entry(struct snd_info_entry *entry);
127 int snd_info_store_text(struct snd_info_entry *entry);
128 int snd_info_restore_text(struct snd_info_entry *entry);
129 
130 int snd_info_card_create(struct snd_card *card);
131 int snd_info_card_register(struct snd_card *card);
132 int snd_info_card_free(struct snd_card *card);
133 void snd_info_card_disconnect(struct snd_card *card);
134 void snd_info_card_id_change(struct snd_card *card);
135 int snd_info_register(struct snd_info_entry *entry);
136 
137 /* for card drivers */
138 int snd_card_proc_new(struct snd_card *card, const char *name,
139                       struct snd_info_entry **entryp);
140 
141 static inline void snd_info_set_text_ops(struct snd_info_entry *entry, 
142         void *private_data,
143         void (*read)(struct snd_info_entry *, struct snd_info_buffer *))
144 {
145         entry->private_data = private_data;
146         entry->c.text.read = read;
147 }
148 
149 int snd_info_check_reserved_words(const char *str);
150 
151 #else
152 
153 #define snd_seq_root NULL
154 #define snd_oss_root NULL
155 
156 static inline int snd_iprintf(struct snd_info_buffer *buffer, char *fmt, ...) { return 0; }
157 static inline int snd_info_init(void) { return 0; }
158 static inline int snd_info_done(void) { return 0; }
159 
160 static inline int snd_info_get_line(struct snd_info_buffer *buffer, char *line, int len) { return 0; }
161 static inline char *snd_info_get_str(char *dest, char *src, int len) { return NULL; }
162 static inline struct snd_info_entry *snd_info_create_module_entry(struct module *module, const char *name, struct snd_info_entry *parent) { return NULL; }
163 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; }
164 static inline void snd_info_free_entry(struct snd_info_entry *entry) { ; }
165 
166 static inline int snd_info_card_create(struct snd_card *card) { return 0; }
167 static inline int snd_info_card_register(struct snd_card *card) { return 0; }
168 static inline int snd_info_card_free(struct snd_card *card) { return 0; }
169 static inline void snd_info_card_disconnect(struct snd_card *card) { }
170 static inline void snd_info_card_id_change(struct snd_card *card) { }
171 static inline int snd_info_register(struct snd_info_entry *entry) { return 0; }
172 
173 static inline int snd_card_proc_new(struct snd_card *card, const char *name,
174                                     struct snd_info_entry **entryp) { return -EINVAL; }
175 static inline void snd_info_set_text_ops(struct snd_info_entry *entry __attribute__((unused)),
176                                          void *private_data,
177                                          void (*read)(struct snd_info_entry *, struct snd_info_buffer *)) {}
178 
179 static inline int snd_info_check_reserved_words(const char *str) { return 1; }
180 
181 #endif
182 
183 /*
184  * OSS info part
185  */
186 
187 #if defined(CONFIG_SND_OSSEMUL) && defined(CONFIG_PROC_FS)
188 
189 #define SNDRV_OSS_INFO_DEV_AUDIO        0
190 #define SNDRV_OSS_INFO_DEV_SYNTH        1
191 #define SNDRV_OSS_INFO_DEV_MIDI         2
192 #define SNDRV_OSS_INFO_DEV_TIMERS       4
193 #define SNDRV_OSS_INFO_DEV_MIXERS       5
194 
195 #define SNDRV_OSS_INFO_DEV_COUNT        6
196 
197 int snd_oss_info_register(int dev, int num, char *string);
198 #define snd_oss_info_unregister(dev, num) snd_oss_info_register(dev, num, NULL)
199 
200 #endif /* CONFIG_SND_OSSEMUL && CONFIG_PROC_FS */
201 
202 #endif /* __SOUND_INFO_H */
203 

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