projects/linux·blob v3.16 · refs

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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 * Prepare the console for the debugger. This includes, but is not
60 * limited to, unblanking the console, loading an appropriate
61 * palette, and allowing debugger generated output.
62 */
63 int (*con_debug_enter)(struct vc_data *);
64 /*
65 * Restore the console to its pre-debug state as closely as possible.
66 */
67 int (*con_debug_leave)(struct vc_data *);
68};
69
70extern const struct consw *conswitchp;
71
72extern const struct consw dummy_con; /* dummy console buffer */
73extern const struct consw vga_con; /* VGA text console */
74extern const struct consw newport_con; /* SGI Newport console */
75extern const struct consw prom_con; /* SPARC PROM console */
76
77int con_is_bound(const struct consw *csw);
78int do_unregister_con_driver(const struct consw *csw);
79int do_take_over_console(const struct consw *sw, int first, int last, int deflt);
80void give_up_console(const struct consw *sw);
81#ifdef CONFIG_HW_CONSOLE
82int con_debug_enter(struct vc_data *vc);
83int con_debug_leave(void);
84#else
85static inline int con_debug_enter(struct vc_data *vc)
86{
87 return 0;
88}
89static inline int con_debug_leave(void)
90{
91 return 0;
92}
93#endif
94
95/* scroll */
96#define SM_UP (1)
97#define SM_DOWN (2)
98
99/* cursor */
100#define CM_DRAW (1)
101#define CM_ERASE (2)
102#define CM_MOVE (3)
103
104/*
105 * The interface for a console, or any other device that wants to capture
106 * console messages (printer driver?)
107 *
108 * If a console driver is marked CON_BOOT then it will be auto-unregistered
109 * when the first real console is registered. This is for early-printk drivers.
110 */
111
112#define CON_PRINTBUFFER (1)
113#define CON_CONSDEV (2) /* Last on the command line */
114#define CON_ENABLED (4)
115#define CON_BOOT (8)
116#define CON_ANYTIME (16) /* Safe to call when cpu is offline */
117#define CON_BRL (32) /* Used for a braille device */
118
119struct console {
120 char name[16];
121 void (*write)(struct console *, const char *, unsigned);
122 int (*read)(struct console *, char *, unsigned);
123 struct tty_driver *(*device)(struct console *, int *);
124 void (*unblank)(void);
125 int (*setup)(struct console *, char *);
126 int (*early_setup)(void);
127 short flags;
128 short index;
129 int cflag;
130 void *data;
131 struct console *next;
132};
133
134/*
135 * for_each_console() allows you to iterate on each console
136 */
137#define for_each_console(con) \
138 for (con = console_drivers; con != NULL; con = con->next)
139
140extern int console_set_on_cmdline;
141extern struct console *early_console;
142
143extern int add_preferred_console(char *name, int idx, char *options);
144extern int update_console_cmdline(char *name, int idx, char *name_new, int idx_new, char *options);
145extern void register_console(struct console *);
146extern int unregister_console(struct console *);
147extern struct console *console_drivers;
148extern void console_lock(void);
149extern int console_trylock(void);
150extern void console_unlock(void);
151extern void console_conditional_schedule(void);
152extern void console_unblank(void);
153extern struct tty_driver *console_device(int *);
154extern void console_stop(struct console *);
155extern void console_start(struct console *);
156extern int is_console_locked(void);
157extern int braille_register_console(struct console *, int index,
158 char *console_options, char *braille_options);
159extern int braille_unregister_console(struct console *);
160#ifdef CONFIG_TTY
161extern void console_sysfs_notify(void);
162#else
163static inline void console_sysfs_notify(void)
164{ }
165#endif
166extern bool console_suspend_enabled;
167
168/* Suspend and resume console messages over PM events */
169extern void suspend_console(void);
170extern void resume_console(void);
171
172int mda_console_init(void);
173void prom_con_init(void);
174
175void vcs_make_sysfs(int index);
176void vcs_remove_sysfs(int index);
177
178/* Some debug stub to catch some of the obvious races in the VT code */
179#if 1
180#define WARN_CONSOLE_UNLOCKED() WARN_ON(!is_console_locked() && !oops_in_progress)
181#else
182#define WARN_CONSOLE_UNLOCKED()
183#endif
184
185/* VESA Blanking Levels */
186#define VESA_NO_BLANKING 0
187#define VESA_VSYNC_SUSPEND 1
188#define VESA_HSYNC_SUSPEND 2
189#define VESA_POWERDOWN 3
190
191#ifdef CONFIG_VGA_CONSOLE
192extern bool vgacon_text_force(void);
193#endif
194
195#endif /* _LINUX_CONSOLE_H */