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 fb_con; /* frame buffer based console */
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 take_over_console(const struct consw *sw, int first, int last, int deflt);
68 void give_up_console(const struct consw *sw);
69
70 /* scroll */
71 #define SM_UP (1)
72 #define SM_DOWN (2)
73
74 /* cursor */
75 #define CM_DRAW (1)
76 #define CM_ERASE (2)
77 #define CM_MOVE (3)
78
79 /*
80 * The interface for a console, or any other device that
81 * wants to capture console messages (printer driver?)
82 */
83
84 #define CON_PRINTBUFFER (1)
85 #define CON_CONSDEV (2) /* Last on the command line */
86 #define CON_ENABLED (4)
87
88 struct console
89 {
90 char name[8];
91 void (*write)(struct console *, const char *, unsigned);
92 int (*read)(struct console *, char *, unsigned);
93 struct tty_driver *(*device)(struct console *, int *);
94 void (*unblank)(void);
95 int (*setup)(struct console *, char *);
96 short flags;
97 short index;
98 int cflag;
99 void *data;
100 struct console *next;
101 };
102
103 extern int add_preferred_console(char *name, int idx, char *options);
104 extern void register_console(struct console *);
105 extern int unregister_console(struct console *);
106 extern struct console *console_drivers;
107 extern void acquire_console_sem(void);
108 extern int try_acquire_console_sem(void);
109 extern void release_console_sem(void);
110 extern void console_conditional_schedule(void);
111 extern void console_unblank(void);
112 extern struct tty_driver *console_device(int *);
113 extern void console_stop(struct console *);
114 extern void console_start(struct console *);
115 extern int is_console_locked(void);
116
117 /* Some debug stub to catch some of the obvious races in the VT code */
118 #if 1
119 #define WARN_CONSOLE_UNLOCKED() WARN_ON(!is_console_locked() && !oops_in_progress)
120 #else
121 #define WARN_CONSOLE_UNLOCKED()
122 #endif
123
124 /* VESA Blanking Levels */
125 #define VESA_NO_BLANKING 0
126 #define VESA_VSYNC_SUSPEND 1
127 #define VESA_HSYNC_SUSPEND 2
128 #define VESA_POWERDOWN 3
129
130 #endif /* _LINUX_CONSOLE_H */
131
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