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
19 struct vc_data;
20 struct console_font_op;
21 struct console_font;
22 struct module;
23 struct 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
31 struct 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
60 extern const struct consw *conswitchp;
61
62 extern const struct consw dummy_con; /* dummy console buffer */
63 extern const struct consw vga_con; /* VGA text console */
64 extern const struct consw newport_con; /* SGI Newport console */
65 extern const struct consw prom_con; /* SPARC PROM console */
66
67 int con_is_bound(const struct consw *csw);
68 int register_con_driver(const struct consw *csw, int first, int last);
69 int unregister_con_driver(const struct consw *csw);
70 int take_over_console(const struct consw *sw, int first, int last, int deflt);
71 void 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
95 struct console {
96 char name[16];
97 void (*write)(struct console *, const char *, unsigned);
98 int (*read)(struct console *, char *, unsigned);
99 struct tty_driver *(*device)(struct console *, int *);
100 void (*unblank)(void);
101 int (*setup)(struct console *, char *);
102 int (*early_setup)(void);
103 short flags;
104 short index;
105 int cflag;
106 void *data;
107 struct console *next;
108 };
109
110 extern int add_preferred_console(char *name, int idx, char *options);
111 extern int update_console_cmdline(char *name, int idx, char *name_new, int idx_new, char *options);
112 extern void register_console(struct console *);
113 extern int unregister_console(struct console *);
114 extern struct console *console_drivers;
115 extern void acquire_console_sem(void);
116 extern int try_acquire_console_sem(void);
117 extern void release_console_sem(void);
118 extern void console_conditional_schedule(void);
119 extern void console_unblank(void);
120 extern struct tty_driver *console_device(int *);
121 extern void console_stop(struct console *);
122 extern void console_start(struct console *);
123 extern int is_console_locked(void);
124
125 extern int console_suspend_enabled;
126
127 /* Suspend and resume console messages over PM events */
128 extern void suspend_console(void);
129 extern void resume_console(void);
130
131 int mda_console_init(void);
132 void prom_con_init(void);
133
134 void vcs_make_sysfs(struct tty_struct *tty);
135 void vcs_remove_sysfs(struct tty_struct *tty);
136
137 /* Some debug stub to catch some of the obvious races in the VT code */
138 #if 1
139 #define WARN_CONSOLE_UNLOCKED() WARN_ON(!is_console_locked() && !oops_in_progress)
140 #else
141 #define WARN_CONSOLE_UNLOCKED()
142 #endif
143
144 /* VESA Blanking Levels */
145 #define VESA_NO_BLANKING 0
146 #define VESA_VSYNC_SUSPEND 1
147 #define VESA_HSYNC_SUSPEND 2
148 #define VESA_POWERDOWN 3
149
150 #endif /* _LINUX_CONSOLE_H */
151
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