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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 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
60extern const struct consw *conswitchp;
61
62extern const struct consw dummy_con; /* dummy console buffer */
63extern const struct consw vga_con; /* VGA text console */
64extern const struct consw newport_con; /* SGI Newport console */
65extern const struct consw prom_con; /* SPARC PROM console */
66
67int con_is_bound(const struct consw *csw);
68int register_con_driver(const struct consw *csw, int first, int last);
69int unregister_con_driver(const struct consw *csw);
70int take_over_console(const struct consw *sw, int first, int last, int deflt);
71void give_up_console(const struct consw *sw);
72/* 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
96struct 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
111extern int console_set_on_cmdline;
112
113extern int add_preferred_console(char *name, int idx, char *options);
114extern int update_console_cmdline(char *name, int idx, char *name_new, int idx_new, char *options);
115extern void register_console(struct console *);
116extern int unregister_console(struct console *);
117extern struct console *console_drivers;
118extern void acquire_console_sem(void);
119extern int try_acquire_console_sem(void);
120extern void release_console_sem(void);
121extern void console_conditional_schedule(void);
122extern void console_unblank(void);
123extern struct tty_driver *console_device(int *);
124extern void console_stop(struct console *);
125extern void console_start(struct console *);
126extern int is_console_locked(void);
127extern int braille_register_console(struct console *, int index,
128 char *console_options, char *braille_options);
129extern int braille_unregister_console(struct console *);
130
131extern int console_suspend_enabled;
132
133/* Suspend and resume console messages over PM events */
134extern void suspend_console(void);
135extern void resume_console(void);
136
137int mda_console_init(void);
138void prom_con_init(void);
139
140void vcs_make_sysfs(struct tty_struct *tty);
141void vcs_remove_sysfs(struct tty_struct *tty);
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#endif /* _LINUX_CONSOLE_H */