blob: 7d0420274de00d26b86d6d986631860bb158d5d3 [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
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
20struct vc_data;
21struct console_font_op;
22struct console_font;
23struct 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
31struct 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
59extern const struct consw *conswitchp;
60
61extern const struct consw dummy_con; /* dummy console buffer */
62extern const struct consw vga_con; /* VGA text console */
63extern const struct consw newport_con; /* SGI Newport console */
64extern const struct consw prom_con; /* SPARC PROM console */
65
Antonino A. Daplas3e795de2006-06-26 00:27:08 -070066int con_is_bound(const struct consw *csw);
67int register_con_driver(const struct consw *csw, int first, int last);
68int unregister_con_driver(const struct consw *csw);
Linus Torvalds1da177e2005-04-16 15:20:36 -070069int take_over_console(const struct consw *sw, int first, int last, int deflt);
70void give_up_console(const struct consw *sw);
Linus Torvalds1da177e2005-04-16 15:20:36 -070071/* 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)
Michael Ellerman76a8ad22006-06-25 05:47:40 -070092#define CON_ANYTIME (16) /* Safe to call when cpu is offline */
Linus Torvalds1da177e2005-04-16 15:20:36 -070093
94struct 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
109extern int add_preferred_console(char *name, int idx, char *options);
110extern void register_console(struct console *);
111extern int unregister_console(struct console *);
112extern struct console *console_drivers;
113extern void acquire_console_sem(void);
114extern int try_acquire_console_sem(void);
115extern void release_console_sem(void);
116extern void console_conditional_schedule(void);
117extern void console_unblank(void);
118extern struct tty_driver *console_device(int *);
119extern void console_stop(struct console *);
120extern void console_start(struct console *);
121extern int is_console_locked(void);
122
Rafael J. Wysockic8eb8b42006-09-25 23:32:56 -0700123#ifndef CONFIG_DISABLE_CONSOLE_SUSPEND
Linus Torvalds557240b2006-06-19 18:16:01 -0700124/* Suspend and resume console messages over PM events */
125extern void suspend_console(void);
126extern void resume_console(void);
Rafael J. Wysockic8eb8b42006-09-25 23:32:56 -0700127#else
128static inline void suspend_console(void) {}
129static inline void resume_console(void) {}
130#endif /* CONFIG_DISABLE_CONSOLE_SUSPEND */
Linus Torvalds557240b2006-06-19 18:16:01 -0700131
Adrian Bunk3cb340e2006-10-03 01:15:06 -0700132int mda_console_init(void);
133void prom_con_init(void);
134
Linus Torvalds1da177e2005-04-16 15:20:36 -0700135/* Some debug stub to catch some of the obvious races in the VT code */
136#if 1
137#define WARN_CONSOLE_UNLOCKED() WARN_ON(!is_console_locked() && !oops_in_progress)
138#else
139#define WARN_CONSOLE_UNLOCKED()
140#endif
141
142/* VESA Blanking Levels */
143#define VESA_NO_BLANKING 0
144#define VESA_VSYNC_SUSPEND 1
145#define VESA_HSYNC_SUSPEND 2
146#define VESA_POWERDOWN 3
147
148#endif /* _LINUX_CONSOLE_H */