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1da177e4 LT |
1 | /* |
2 | * linux/include/linux/console.h | |
3 | * | |
4 | * Copyright (C) 1993 Hamish Macdonald | |
5 | * | |
6 | * This file is subject to the terms and conditions of the GNU General Public | |
7 | * License. See the file COPYING in the main directory of this archive | |
8 | * for more details. | |
9 | * | |
10 | * Changed: | |
11 | * 10-Mar-94: Arno Griffioen: Conversion for vt100 emulator port from PC LINUX | |
12 | */ | |
13 | ||
14 | #ifndef _LINUX_CONSOLE_H_ | |
15 | #define _LINUX_CONSOLE_H_ 1 | |
16 | ||
17 | #include <linux/types.h> | |
18 | #include <linux/spinlock.h> | |
19 | ||
20 | struct vc_data; | |
21 | struct console_font_op; | |
22 | struct console_font; | |
23 | struct module; | |
24 | ||
25 | /* | |
26 | * this is what the terminal answers to a ESC-Z or csi0c query. | |
27 | */ | |
28 | #define VT100ID "\033[?1;2c" | |
29 | #define VT102ID "\033[?6c" | |
30 | ||
31 | struct consw { | |
32 | struct module *owner; | |
33 | const char *(*con_startup)(void); | |
34 | void (*con_init)(struct vc_data *, int); | |
35 | void (*con_deinit)(struct vc_data *); | |
36 | void (*con_clear)(struct vc_data *, int, int, int, int); | |
37 | void (*con_putc)(struct vc_data *, int, int, int); | |
38 | void (*con_putcs)(struct vc_data *, const unsigned short *, int, int, int); | |
39 | void (*con_cursor)(struct vc_data *, int); | |
40 | int (*con_scroll)(struct vc_data *, int, int, int, int); | |
41 | void (*con_bmove)(struct vc_data *, int, int, int, int, int, int); | |
42 | int (*con_switch)(struct vc_data *); | |
43 | int (*con_blank)(struct vc_data *, int, int); | |
44 | int (*con_font_set)(struct vc_data *, struct console_font *, unsigned); | |
45 | int (*con_font_get)(struct vc_data *, struct console_font *); | |
46 | int (*con_font_default)(struct vc_data *, struct console_font *, char *); | |
47 | int (*con_font_copy)(struct vc_data *, int); | |
48 | int (*con_resize)(struct vc_data *, unsigned int, unsigned int); | |
49 | int (*con_set_palette)(struct vc_data *, unsigned char *); | |
50 | int (*con_scrolldelta)(struct vc_data *, int); | |
51 | int (*con_set_origin)(struct vc_data *); | |
52 | void (*con_save_screen)(struct vc_data *); | |
53 | u8 (*con_build_attr)(struct vc_data *, u8, u8, u8, u8, u8); | |
54 | void (*con_invert_region)(struct vc_data *, u16 *, int); | |
55 | u16 *(*con_screen_pos)(struct vc_data *, int); | |
56 | unsigned long (*con_getxy)(struct vc_data *, unsigned long, int *, int *); | |
57 | }; | |
58 | ||
59 | extern const struct consw *conswitchp; | |
60 | ||
61 | extern const struct consw dummy_con; /* dummy console buffer */ | |
62 | extern const struct consw vga_con; /* VGA text console */ | |
63 | extern const struct consw newport_con; /* SGI Newport console */ | |
64 | extern const struct consw prom_con; /* SPARC PROM console */ | |
65 | ||
3e795de7 AD |
66 | int con_is_bound(const struct consw *csw); |
67 | int register_con_driver(const struct consw *csw, int first, int last); | |
68 | int unregister_con_driver(const struct consw *csw); | |
1da177e4 LT |
69 | int take_over_console(const struct consw *sw, int first, int last, int deflt); |
70 | void give_up_console(const struct consw *sw); | |
1da177e4 LT |
71 | /* scroll */ |
72 | #define SM_UP (1) | |
73 | #define SM_DOWN (2) | |
74 | ||
75 | /* cursor */ | |
76 | #define CM_DRAW (1) | |
77 | #define CM_ERASE (2) | |
78 | #define CM_MOVE (3) | |
79 | ||
80 | /* | |
81 | * The interface for a console, or any other device that wants to capture | |
82 | * console messages (printer driver?) | |
83 | * | |
84 | * If a console driver is marked CON_BOOT then it will be auto-unregistered | |
85 | * when the first real console is registered. This is for early-printk drivers. | |
86 | */ | |
87 | ||
88 | #define CON_PRINTBUFFER (1) | |
89 | #define CON_CONSDEV (2) /* Last on the command line */ | |
90 | #define CON_ENABLED (4) | |
91 | #define CON_BOOT (8) | |
76a8ad29 | 92 | #define CON_ANYTIME (16) /* Safe to call when cpu is offline */ |
1da177e4 LT |
93 | |
94 | struct console | |
95 | { | |
96 | char name[8]; | |
97 | void (*write)(struct console *, const char *, unsigned); | |
98 | int (*read)(struct console *, char *, unsigned); | |
99 | struct tty_driver *(*device)(struct console *, int *); | |
100 | void (*unblank)(void); | |
101 | int (*setup)(struct console *, char *); | |
102 | short flags; | |
103 | short index; | |
104 | int cflag; | |
105 | void *data; | |
106 | struct console *next; | |
107 | }; | |
108 | ||
109 | extern int add_preferred_console(char *name, int idx, char *options); | |
110 | extern void register_console(struct console *); | |
111 | extern int unregister_console(struct console *); | |
112 | extern struct console *console_drivers; | |
113 | extern void acquire_console_sem(void); | |
114 | extern int try_acquire_console_sem(void); | |
115 | extern void release_console_sem(void); | |
116 | extern void console_conditional_schedule(void); | |
117 | extern void console_unblank(void); | |
118 | extern struct tty_driver *console_device(int *); | |
119 | extern void console_stop(struct console *); | |
120 | extern void console_start(struct console *); | |
121 | extern int is_console_locked(void); | |
122 | ||
c8eb8b40 | 123 | #ifndef CONFIG_DISABLE_CONSOLE_SUSPEND |
557240b4 LT |
124 | /* Suspend and resume console messages over PM events */ |
125 | extern void suspend_console(void); | |
126 | extern void resume_console(void); | |
c8eb8b40 RW |
127 | #else |
128 | static inline void suspend_console(void) {} | |
129 | static inline void resume_console(void) {} | |
130 | #endif /* CONFIG_DISABLE_CONSOLE_SUSPEND */ | |
557240b4 | 131 | |
1da177e4 LT |
132 | /* Some debug stub to catch some of the obvious races in the VT code */ |
133 | #if 1 | |
134 | #define WARN_CONSOLE_UNLOCKED() WARN_ON(!is_console_locked() && !oops_in_progress) | |
135 | #else | |
136 | #define WARN_CONSOLE_UNLOCKED() | |
137 | #endif | |
138 | ||
139 | /* VESA Blanking Levels */ | |
140 | #define VESA_NO_BLANKING 0 | |
141 | #define VESA_VSYNC_SUSPEND 1 | |
142 | #define VESA_HSYNC_SUSPEND 2 | |
143 | #define VESA_POWERDOWN 3 | |
144 | ||
145 | #endif /* _LINUX_CONSOLE_H */ |