2 * linux/include/linux/console.h
4 * Copyright (C) 1993 Hamish Macdonald
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
11 * 10-Mar-94: Arno Griffioen: Conversion for vt100 emulator port from PC LINUX
14 #ifndef _LINUX_CONSOLE_H_
15 #define _LINUX_CONSOLE_H_ 1
17 #include <linux/types.h>
20 struct console_font_op;
26 * this is what the terminal answers to a ESC-Z or csi0c query.
28 #define VT100ID "\033[?1;2c"
29 #define VT102ID "\033[?6c"
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,
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 *);
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.
63 int (*con_debug_enter)(struct vc_data *);
65 * Restore the console to its pre-debug state as closely as possible.
67 int (*con_debug_leave)(struct vc_data *);
70 extern const struct consw *conswitchp;
72 extern const struct consw dummy_con; /* dummy console buffer */
73 extern const struct consw vga_con; /* VGA text console */
74 extern const struct consw newport_con; /* SGI Newport console */
75 extern const struct consw prom_con; /* SPARC PROM console */
77 int con_is_bound(const struct consw *csw);
78 int register_con_driver(const struct consw *csw, int first, int last);
79 int unregister_con_driver(const struct consw *csw);
80 int do_unregister_con_driver(const struct consw *csw);
81 int take_over_console(const struct consw *sw, int first, int last, int deflt);
82 int do_take_over_console(const struct consw *sw, int first, int last, int deflt);
83 void give_up_console(const struct consw *sw);
84 #ifdef CONFIG_HW_CONSOLE
85 int con_debug_enter(struct vc_data *vc);
86 int con_debug_leave(void);
88 static inline int con_debug_enter(struct vc_data *vc)
92 static inline int con_debug_leave(void)
108 * The interface for a console, or any other device that wants to capture
109 * console messages (printer driver?)
111 * If a console driver is marked CON_BOOT then it will be auto-unregistered
112 * when the first real console is registered. This is for early-printk drivers.
115 #define CON_PRINTBUFFER (1)
116 #define CON_CONSDEV (2) /* Last on the command line */
117 #define CON_ENABLED (4)
119 #define CON_ANYTIME (16) /* Safe to call when cpu is offline */
120 #define CON_BRL (32) /* Used for a braille device */
124 void (*write)(struct console *, const char *, unsigned);
125 int (*read)(struct console *, char *, unsigned);
126 struct tty_driver *(*device)(struct console *, int *);
127 void (*unblank)(void);
128 int (*setup)(struct console *, char *);
129 int (*early_setup)(void);
134 struct console *next;
138 * for_each_console() allows you to iterate on each console
140 #define for_each_console(con) \
141 for (con = console_drivers; con != NULL; con = con->next)
143 extern int console_set_on_cmdline;
144 extern struct console *early_console;
146 extern int add_preferred_console(char *name, int idx, char *options);
147 extern int update_console_cmdline(char *name, int idx, char *name_new, int idx_new, char *options);
148 extern void register_console(struct console *);
149 extern int unregister_console(struct console *);
150 extern struct console *console_drivers;
151 extern void console_lock(void);
152 extern int console_trylock(void);
153 extern void console_unlock(void);
154 extern void console_conditional_schedule(void);
155 extern void console_unblank(void);
156 extern struct tty_driver *console_device(int *);
157 extern void console_stop(struct console *);
158 extern void console_start(struct console *);
159 extern int is_console_locked(void);
160 extern int braille_register_console(struct console *, int index,
161 char *console_options, char *braille_options);
162 extern int braille_unregister_console(struct console *);
164 extern void console_sysfs_notify(void);
166 static inline void console_sysfs_notify(void)
169 extern bool console_suspend_enabled;
171 /* Suspend and resume console messages over PM events */
172 extern void suspend_console(void);
173 extern void resume_console(void);
175 int mda_console_init(void);
176 void prom_con_init(void);
178 void vcs_make_sysfs(int index);
179 void vcs_remove_sysfs(int index);
181 /* Some debug stub to catch some of the obvious races in the VT code */
183 #define WARN_CONSOLE_UNLOCKED() WARN_ON(!is_console_locked() && !oops_in_progress)
185 #define WARN_CONSOLE_UNLOCKED()
188 /* VESA Blanking Levels */
189 #define VESA_NO_BLANKING 0
190 #define VESA_VSYNC_SUSPEND 1
191 #define VESA_HSYNC_SUSPEND 2
192 #define VESA_POWERDOWN 3
194 #ifdef CONFIG_VGA_CONSOLE
195 extern bool vgacon_text_force(void);
198 #endif /* _LINUX_CONSOLE_H */