Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
tjh.dev
kernel
os
linux
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
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
66int take_over_console(const struct consw *sw, int first, int last, int deflt);
67void give_up_console(const struct consw *sw);
68
69/* scroll */
70#define SM_UP (1)
71#define SM_DOWN (2)
72
73/* cursor */
74#define CM_DRAW (1)
75#define CM_ERASE (2)
76#define CM_MOVE (3)
77
78/*
79 * The interface for a console, or any other device that wants to capture
80 * console messages (printer driver?)
81 *
82 * If a console driver is marked CON_BOOT then it will be auto-unregistered
83 * when the first real console is registered. This is for early-printk drivers.
84 */
85
86#define CON_PRINTBUFFER (1)
87#define CON_CONSDEV (2) /* Last on the command line */
88#define CON_ENABLED (4)
89#define CON_BOOT (8)
90
91struct console
92{
93 char name[8];
94 void (*write)(struct console *, const char *, unsigned);
95 int (*read)(struct console *, char *, unsigned);
96 struct tty_driver *(*device)(struct console *, int *);
97 void (*unblank)(void);
98 int (*setup)(struct console *, char *);
99 short flags;
100 short index;
101 int cflag;
102 void *data;
103 struct console *next;
104};
105
106extern int add_preferred_console(char *name, int idx, char *options);
107extern void register_console(struct console *);
108extern int unregister_console(struct console *);
109extern struct console *console_drivers;
110extern void acquire_console_sem(void);
111extern int try_acquire_console_sem(void);
112extern void release_console_sem(void);
113extern void console_conditional_schedule(void);
114extern void console_unblank(void);
115extern struct tty_driver *console_device(int *);
116extern void console_stop(struct console *);
117extern void console_start(struct console *);
118extern int is_console_locked(void);
119
120/* Some debug stub to catch some of the obvious races in the VT code */
121#if 1
122#define WARN_CONSOLE_UNLOCKED() WARN_ON(!is_console_locked() && !oops_in_progress)
123#else
124#define WARN_CONSOLE_UNLOCKED()
125#endif
126
127/* VESA Blanking Levels */
128#define VESA_NO_BLANKING 0
129#define VESA_VSYNC_SUSPEND 1
130#define VESA_HSYNC_SUSPEND 2
131#define VESA_POWERDOWN 3
132
133#endif /* _LINUX_CONSOLE_H */