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
snd_card_info_read_oss(struct snd_info_buffer * buffer)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 
snd_info_set_text_ops(struct snd_info_entry * entry,void * private_data,void (* read)(struct snd_info_entry *,struct snd_info_buffer *))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 
snd_iprintf(struct snd_info_buffer * buffer,char * fmt,...)156 static inline int snd_iprintf(struct snd_info_buffer *buffer, char *fmt, ...) { return 0; }
snd_info_init(void)157 static inline int snd_info_init(void) { return 0; }
snd_info_done(void)158 static inline int snd_info_done(void) { return 0; }
159 
snd_info_get_line(struct snd_info_buffer * buffer,char * line,int len)160 static inline int snd_info_get_line(struct snd_info_buffer *buffer, char *line, int len) { return 0; }
snd_info_get_str(char * dest,char * src,int len)161 static inline char *snd_info_get_str(char *dest, char *src, int len) { return NULL; }
snd_info_create_module_entry(struct module * module,const char * name,struct snd_info_entry * parent)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; }
snd_info_create_card_entry(struct snd_card * card,const char * name,struct snd_info_entry * parent)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; }
snd_info_free_entry(struct snd_info_entry * entry)164 static inline void snd_info_free_entry(struct snd_info_entry *entry) { ; }
165 
snd_info_card_create(struct snd_card * card)166 static inline int snd_info_card_create(struct snd_card *card) { return 0; }
snd_info_card_register(struct snd_card * card)167 static inline int snd_info_card_register(struct snd_card *card) { return 0; }
snd_info_card_free(struct snd_card * card)168 static inline int snd_info_card_free(struct snd_card *card) { return 0; }
snd_info_card_disconnect(struct snd_card * card)169 static inline void snd_info_card_disconnect(struct snd_card *card) { }
snd_info_card_id_change(struct snd_card * card)170 static inline void snd_info_card_id_change(struct snd_card *card) { }
snd_info_register(struct snd_info_entry * entry)171 static inline int snd_info_register(struct snd_info_entry *entry) { return 0; }
172 
snd_card_proc_new(struct snd_card * card,const char * name,struct snd_info_entry ** entryp)173 static inline int snd_card_proc_new(struct snd_card *card, const char *name,
174 				    struct snd_info_entry **entryp) { return -EINVAL; }
snd_info_set_text_ops(struct snd_info_entry * entry,void * private_data,void (* read)(struct snd_info_entry *,struct snd_info_buffer *))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 
snd_info_check_reserved_words(const char * str)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