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
19struct vc_data;
20struct console_font_op;
21struct console_font;
22struct module;
23struct 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
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, 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 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);
69int take_over_console(const struct consw *sw, int first, int last, int deflt);
70void give_up_console(const struct consw *sw);
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)
92#define CON_ANYTIME (16) /* Safe to call when cpu is offline */
93
94struct console {
95 char name[16];
96 void (*write)(struct console *, const char *, unsigned);
97 int (*read)(struct console *, char *, unsigned);
98 struct tty_driver *(*device)(struct console *, int *);
99 void (*unblank)(void);
100 int (*setup)(struct console *, char *);
101 int (*early_setup)(void);
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 int update_console_cmdline(char *name, int idx, char *name_new, int idx_new, char *options);
111extern void register_console(struct console *);
112extern int unregister_console(struct console *);
113extern struct console *console_drivers;
114extern void acquire_console_sem(void);
115extern int try_acquire_console_sem(void);
116extern void release_console_sem(void);
117extern void console_conditional_schedule(void);
118extern void console_unblank(void);
119extern struct tty_driver *console_device(int *);
120extern void console_stop(struct console *);
121extern void console_start(struct console *);
122extern int is_console_locked(void);
123
124#ifndef CONFIG_DISABLE_CONSOLE_SUSPEND
125/* Suspend and resume console messages over PM events */
126extern void suspend_console(void);
127extern void resume_console(void);
128#else
129static inline void suspend_console(void) {}
130static inline void resume_console(void) {}
131#endif /* CONFIG_DISABLE_CONSOLE_SUSPEND */
132
133int mda_console_init(void);
134void prom_con_init(void);
135
136void vcs_make_sysfs(struct tty_struct *tty);
137void vcs_remove_sysfs(struct tty_struct *tty);
138
139/* Some debug stub to catch some of the obvious races in the VT code */
140#if 1
141#define WARN_CONSOLE_UNLOCKED() WARN_ON(!is_console_locked() && !oops_in_progress)
142#else
143#define WARN_CONSOLE_UNLOCKED()
144#endif
145
146/* VESA Blanking Levels */
147#define VESA_NO_BLANKING 0
148#define VESA_VSYNC_SUSPEND 1
149#define VESA_HSYNC_SUSPEND 2
150#define VESA_POWERDOWN 3
151
152#endif /* _LINUX_CONSOLE_H */