diff options
Diffstat (limited to 'kernel/include/linux/console.h')
| -rw-r--r-- | kernel/include/linux/console.h | 194 |
1 files changed, 194 insertions, 0 deletions
diff --git a/kernel/include/linux/console.h b/kernel/include/linux/console.h new file mode 100644 index 000000000..9f50fb413 --- /dev/null +++ b/kernel/include/linux/console.h @@ -0,0 +1,194 @@ +/* + * linux/include/linux/console.h + * + * Copyright (C) 1993 Hamish Macdonald + * + * This file is subject to the terms and conditions of the GNU General Public + * License. See the file COPYING in the main directory of this archive + * for more details. + * + * Changed: + * 10-Mar-94: Arno Griffioen: Conversion for vt100 emulator port from PC LINUX + */ + +#ifndef _LINUX_CONSOLE_H_ +#define _LINUX_CONSOLE_H_ 1 + +#include <linux/types.h> + +struct vc_data; +struct console_font_op; +struct console_font; +struct module; +struct tty_struct; + +/* + * this is what the terminal answers to a ESC-Z or csi0c query. + */ +#define VT100ID "\033[?1;2c" +#define VT102ID "\033[?6c" + +struct consw { + struct module *owner; + const char *(*con_startup)(void); + void (*con_init)(struct vc_data *, int); + void (*con_deinit)(struct vc_data *); + void (*con_clear)(struct vc_data *, int, int, int, int); + void (*con_putc)(struct vc_data *, int, int, int); + void (*con_putcs)(struct vc_data *, const unsigned short *, int, int, int); + void (*con_cursor)(struct vc_data *, int); + int (*con_scroll)(struct vc_data *, int, int, int, int); + void (*con_bmove)(struct vc_data *, int, int, int, int, int, int); + int (*con_switch)(struct vc_data *); + int (*con_blank)(struct vc_data *, int, int); + int (*con_font_set)(struct vc_data *, struct console_font *, unsigned); + int (*con_font_get)(struct vc_data *, struct console_font *); + int (*con_font_default)(struct vc_data *, struct console_font *, char *); + int (*con_font_copy)(struct vc_data *, int); + int (*con_resize)(struct vc_data *, unsigned int, unsigned int, + unsigned int); + int (*con_set_palette)(struct vc_data *, unsigned char *); + int (*con_scrolldelta)(struct vc_data *, int); + int (*con_set_origin)(struct vc_data *); + void (*con_save_screen)(struct vc_data *); + u8 (*con_build_attr)(struct vc_data *, u8, u8, u8, u8, u8, u8); + void (*con_invert_region)(struct vc_data *, u16 *, int); + u16 *(*con_screen_pos)(struct vc_data *, int); + unsigned long (*con_getxy)(struct vc_data *, unsigned long, int *, int *); + /* + * Prepare the console for the debugger. This includes, but is not + * limited to, unblanking the console, loading an appropriate + * palette, and allowing debugger generated output. + */ + int (*con_debug_enter)(struct vc_data *); + /* + * Restore the console to its pre-debug state as closely as possible. + */ + int (*con_debug_leave)(struct vc_data *); +}; + +extern const struct consw *conswitchp; + +extern const struct consw dummy_con; /* dummy console buffer */ +extern const struct consw vga_con; /* VGA text console */ +extern const struct consw newport_con; /* SGI Newport console */ +extern const struct consw prom_con; /* SPARC PROM console */ + +int con_is_bound(const struct consw *csw); +int do_unregister_con_driver(const struct consw *csw); +int do_take_over_console(const struct consw *sw, int first, int last, int deflt); +void give_up_console(const struct consw *sw); +#ifdef CONFIG_HW_CONSOLE +int con_debug_enter(struct vc_data *vc); +int con_debug_leave(void); +#else +static inline int con_debug_enter(struct vc_data *vc) +{ + return 0; +} +static inline int con_debug_leave(void) +{ + return 0; +} +#endif + +/* scroll */ +#define SM_UP (1) +#define SM_DOWN (2) + +/* cursor */ +#define CM_DRAW (1) +#define CM_ERASE (2) +#define CM_MOVE (3) + +/* + * The interface for a console, or any other device that wants to capture + * console messages (printer driver?) + * + * If a console driver is marked CON_BOOT then it will be auto-unregistered + * when the first real console is registered. This is for early-printk drivers. + */ + +#define CON_PRINTBUFFER (1) +#define CON_CONSDEV (2) /* Last on the command line */ +#define CON_ENABLED (4) +#define CON_BOOT (8) +#define CON_ANYTIME (16) /* Safe to call when cpu is offline */ +#define CON_BRL (32) /* Used for a braille device */ + +struct console { + char name[16]; + void (*write)(struct console *, const char *, unsigned); + int (*read)(struct console *, char *, unsigned); + struct tty_driver *(*device)(struct console *, int *); + void (*unblank)(void); + int (*setup)(struct console *, char *); + int (*match)(struct console *, char *name, int idx, char *options); + short flags; + short index; + int cflag; + void *data; + struct console *next; +}; + +/* + * for_each_console() allows you to iterate on each console + */ +#define for_each_console(con) \ + for (con = console_drivers; con != NULL; con = con->next) + +extern int console_set_on_cmdline; +extern struct console *early_console; + +extern int add_preferred_console(char *name, int idx, char *options); +extern void register_console(struct console *); +extern int unregister_console(struct console *); +extern struct console *console_drivers; +extern void console_lock(void); +extern int console_trylock(void); +extern void console_unlock(void); +extern void console_conditional_schedule(void); +extern void console_unblank(void); +extern struct tty_driver *console_device(int *); +extern void console_stop(struct console *); +extern void console_start(struct console *); +extern int is_console_locked(void); +extern int braille_register_console(struct console *, int index, + char *console_options, char *braille_options); +extern int braille_unregister_console(struct console *); +#ifdef CONFIG_TTY +extern void console_sysfs_notify(void); +#else +static inline void console_sysfs_notify(void) +{ } +#endif +extern bool console_suspend_enabled; + +/* Suspend and resume console messages over PM events */ +extern void suspend_console(void); +extern void resume_console(void); + +int mda_console_init(void); +void prom_con_init(void); + +void vcs_make_sysfs(int index); +void vcs_remove_sysfs(int index); + +/* Some debug stub to catch some of the obvious races in the VT code */ +#if 1 +#define WARN_CONSOLE_UNLOCKED() WARN_ON(!is_console_locked() && !oops_in_progress) +#else +#define WARN_CONSOLE_UNLOCKED() +#endif + +/* VESA Blanking Levels */ +#define VESA_NO_BLANKING 0 +#define VESA_VSYNC_SUSPEND 1 +#define VESA_HSYNC_SUSPEND 2 +#define VESA_POWERDOWN 3 + +#ifdef CONFIG_VGA_CONSOLE +extern bool vgacon_text_force(void); +#endif + +#endif /* _LINUX_CONSOLE_H */ |