Line data Source code
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 :
19 : struct vc_data;
20 : struct console_font_op;
21 : struct console_font;
22 : struct module;
23 : struct tty_struct;
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 : unsigned int);
50 : int (*con_set_palette)(struct vc_data *, unsigned char *);
51 : int (*con_scrolldelta)(struct vc_data *, int);
52 : int (*con_set_origin)(struct vc_data *);
53 : void (*con_save_screen)(struct vc_data *);
54 : u8 (*con_build_attr)(struct vc_data *, u8, u8, u8, u8, u8, u8);
55 : void (*con_invert_region)(struct vc_data *, u16 *, int);
56 : u16 *(*con_screen_pos)(struct vc_data *, int);
57 : unsigned long (*con_getxy)(struct vc_data *, unsigned long, int *, int *);
58 : };
59 :
60 : extern const struct consw *conswitchp;
61 :
62 : extern const struct consw dummy_con; /* dummy console buffer */
63 : extern const struct consw vga_con; /* VGA text console */
64 : extern const struct consw newport_con; /* SGI Newport console */
65 : extern const struct consw prom_con; /* SPARC PROM console */
66 :
67 : int con_is_bound(const struct consw *csw);
68 : int register_con_driver(const struct consw *csw, int first, int last);
69 : int unregister_con_driver(const struct consw *csw);
70 : int take_over_console(const struct consw *sw, int first, int last, int deflt);
71 : void give_up_console(const struct consw *sw);
72 1 : /* scroll */
73 : #define SM_UP (1)
74 : #define SM_DOWN (2)
75 :
76 : /* cursor */
77 : #define CM_DRAW (1)
78 : #define CM_ERASE (2)
79 : #define CM_MOVE (3)
80 :
81 : /*
82 : * The interface for a console, or any other device that wants to capture
83 : * console messages (printer driver?)
84 : *
85 : * If a console driver is marked CON_BOOT then it will be auto-unregistered
86 : * when the first real console is registered. This is for early-printk drivers.
87 : */
88 :
89 : #define CON_PRINTBUFFER (1)
90 : #define CON_CONSDEV (2) /* Last on the command line */
91 : #define CON_ENABLED (4)
92 : #define CON_BOOT (8)
93 : #define CON_ANYTIME (16) /* Safe to call when cpu is offline */
94 : #define CON_BRL (32) /* Used for a braille device */
95 :
96 : struct console {
97 : char name[16];
98 : void (*write)(struct console *, const char *, unsigned);
99 : int (*read)(struct console *, char *, unsigned);
100 : struct tty_driver *(*device)(struct console *, int *);
101 : void (*unblank)(void);
102 : int (*setup)(struct console *, char *);
103 : int (*early_setup)(void);
104 : short flags;
105 : short index;
106 : int cflag;
107 : void *data;
108 : struct console *next;
109 : };
110 :
111 : extern int console_set_on_cmdline;
112 :
113 : extern int add_preferred_console(char *name, int idx, char *options);
114 : extern int update_console_cmdline(char *name, int idx, char *name_new, int idx_new, char *options);
115 : extern void register_console(struct console *);
116 : extern int unregister_console(struct console *);
117 : extern struct console *console_drivers;
118 : extern void acquire_console_sem(void);
119 : extern int try_acquire_console_sem(void);
120 : extern void release_console_sem(void);
121 : extern void console_conditional_schedule(void);
122 : extern void console_unblank(void);
123 : extern struct tty_driver *console_device(int *);
124 : extern void console_stop(struct console *);
125 : extern void console_start(struct console *);
126 : extern int is_console_locked(void);
127 : extern int braille_register_console(struct console *, int index,
128 : char *console_options, char *braille_options);
129 : extern int braille_unregister_console(struct console *);
130 :
131 : extern int console_suspend_enabled;
132 :
133 : /* Suspend and resume console messages over PM events */
134 : extern void suspend_console(void);
135 : extern void resume_console(void);
136 :
137 : int mda_console_init(void);
138 : void prom_con_init(void);
139 :
140 : void vcs_make_sysfs(int index);
141 : void vcs_remove_sysfs(int index);
142 :
143 : /* Some debug stub to catch some of the obvious races in the VT code */
144 : #if 1
145 : #define WARN_CONSOLE_UNLOCKED() WARN_ON(!is_console_locked() && !oops_in_progress)
146 : #else
147 : #define WARN_CONSOLE_UNLOCKED()
148 : #endif
149 :
150 : /* VESA Blanking Levels */
151 : #define VESA_NO_BLANKING 0
152 : #define VESA_VSYNC_SUSPEND 1
153 : #define VESA_HSYNC_SUSPEND 2
154 : #define VESA_POWERDOWN 3
155 :
156 : #ifdef CONFIG_VGA_CONSOLE
157 : extern bool vgacon_text_force(void);
158 : #endif
159 :
160 : #endif /* _LINUX_CONSOLE_H */
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