source: GPL/alsa-kernel/include/sound/info.h@ 18

Last change on this file since 18 was 18, checked in by vladest, 20 years ago

initial import
File size: 6.9 KB
Line 
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 */
28struct 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#define SNDRV_INFO_CONTENT_TEXT 0
38#define SNDRV_INFO_CONTENT_DATA 1
39
40struct snd_info_entry;
41
42struct snd_info_entry_text {
43 unsigned long read_size;
44 unsigned long write_size;
45 void (*read) (struct snd_info_entry *entry, struct snd_info_buffer *buffer);
46 void (*write) (struct snd_info_entry *entry, struct snd_info_buffer *buffer);
47};
48
49struct 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 long (*read) (struct snd_info_entry *entry, void *file_private_data,
55 struct file * file, char __user *buf,
56 unsigned long count, unsigned long pos);
57 long (*write) (struct snd_info_entry *entry, void *file_private_data,
58 struct file * file, const char __user *buf,
59 unsigned long count, unsigned long pos);
60 long long (*llseek) (struct snd_info_entry *entry, void *file_private_data,
61 struct file * file, long long offset, int orig);
62 unsigned int (*poll) (struct snd_info_entry *entry, void *file_private_data,
63 struct file * file, poll_table * wait);
64 int (*ioctl) (struct snd_info_entry *entry, void *file_private_data,
65 struct file * file, unsigned int cmd, unsigned long arg);
66 int (*mmap) (struct snd_info_entry *entry, void *file_private_data,
67 struct inode * inode, struct file * file,
68 struct vm_area_struct * vma);
69};
70
71struct snd_info_entry {
72 const char *name;
73 mode_t mode;
74 long size;
75 unsigned short content;
76 unsigned short disconnected: 1;
77 union {
78 struct snd_info_entry_text text;
79 struct snd_info_entry_ops *ops;
80 } c;
81 struct snd_info_entry *parent;
82 struct snd_card *card;
83 struct module *module;
84 void *private_data;
85 void (*private_free)(struct snd_info_entry *entry);
86 struct proc_dir_entry *p;
87 struct semaphore access;
88};
89
90int snd_info_check_reserved_words(const char *str);
91
92#if defined(CONFIG_SND_OSSEMUL) && defined(CONFIG_PROC_FS)
93int snd_info_minor_register(void);
94int snd_info_minor_unregister(void);
95#else
96#define snd_info_minor_register() /* NOP */
97#define snd_info_minor_unregister() /* NOP */
98#endif
99
100
101#ifdef CONFIG_PROC_FS
102
103extern struct snd_info_entry *snd_seq_root;
104#ifdef CONFIG_SND_OSSEMUL
105extern struct snd_info_entry *snd_oss_root;
106#else
107#define snd_oss_root NULL
108#endif
109
110int snd_iprintf(struct snd_info_buffer * buffer, char *fmt,...);
111int snd_info_init(void);
112int snd_info_done(void);
113
114int snd_info_get_line(struct snd_info_buffer * buffer, char *line, int len);
115char *snd_info_get_str(char *dest, char *src, int len);
116struct snd_info_entry *snd_info_create_module_entry(struct module * module,
117 const char *name,
118 struct snd_info_entry * parent);
119struct snd_info_entry *snd_info_create_card_entry(struct snd_card * card,
120 const char *name,
121 struct snd_info_entry * parent);
122void snd_info_free_entry(struct snd_info_entry * entry);
123int snd_info_store_text(struct snd_info_entry * entry);
124int snd_info_restore_text(struct snd_info_entry * entry);
125
126int snd_info_card_create(struct snd_card * card);
127int snd_info_card_register(struct snd_card * card);
128int snd_info_card_free(struct snd_card * card);
129int snd_info_register(struct snd_info_entry * entry);
130int snd_info_unregister(struct snd_info_entry * entry);
131
132/* for card drivers */
133int snd_card_proc_new(struct snd_card *card, const char *name, struct snd_info_entry **entryp);
134
135static inline void snd_info_set_text_ops(struct snd_info_entry *entry,
136 void *private_data,
137 long read_size,
138 void (*read)(struct snd_info_entry *, struct snd_info_buffer *))
139{
140 entry->private_data = private_data;
141 entry->c.text.read_size = read_size;
142 entry->c.text.read = read;
143}
144
145
146#else
147
148#define snd_seq_root NULL
149#define snd_oss_root NULL
150
151static inline int snd_iprintf(struct snd_info_buffer * buffer, char *fmt,...) { return 0; }
152static inline int snd_info_init(void) { return 0; }
153static inline int snd_info_done(void) { return 0; }
154
155static inline int snd_info_get_line(struct snd_info_buffer * buffer, char *line, int len) { return 0; }
156static inline char *snd_info_get_str(char *dest, char *src, int len) { return NULL; }
157static inline struct snd_info_entry *snd_info_create_module_entry(struct module * module, const char *name, struct snd_info_entry * parent) { return NULL; }
158static inline struct snd_info_entry *snd_info_create_card_entry(struct snd_card * card, const char *name, struct snd_info_entry * parent) { return NULL; }
159static inline void snd_info_free_entry(struct snd_info_entry * entry) { ; }
160
161static inline int snd_info_card_create(struct snd_card * card) { return 0; }
162static inline int snd_info_card_register(struct snd_card * card) { return 0; }
163static inline int snd_info_card_free(struct snd_card * card) { return 0; }
164static inline int snd_info_register(struct snd_info_entry * entry) { return 0; }
165static inline int snd_info_unregister(struct snd_info_entry * entry) { return 0; }
166
167#define snd_card_proc_new(card,name,entryp) 0 /* always success */
168#define snd_info_set_text_ops(entry,private_data,read_size,read) /*NOP*/
169
170#endif
171
172/*
173 * OSS info part
174 */
175
176#if defined(CONFIG_SND_OSSEMUL) && defined(CONFIG_PROC_FS)
177
178#define SNDRV_OSS_INFO_DEV_AUDIO 0
179#define SNDRV_OSS_INFO_DEV_SYNTH 1
180#define SNDRV_OSS_INFO_DEV_MIDI 2
181#define SNDRV_OSS_INFO_DEV_TIMERS 4
182#define SNDRV_OSS_INFO_DEV_MIXERS 5
183
184#define SNDRV_OSS_INFO_DEV_COUNT 6
185
186int snd_oss_info_register(int dev, int num, char *string);
187#define snd_oss_info_unregister(dev, num) snd_oss_info_register(dev, num, NULL)
188
189#endif /* CONFIG_SND_OSSEMUL && CONFIG_PROC_FS */
190
191#endif /* __SOUND_INFO_H */
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