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- /*
- * 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/atomic.h>
- #include <linux/types.h>
- struct vc_data;
- struct console_font_op;
- struct console_font;
- struct module;
- struct tty_struct;
- struct notifier_block;
- enum con_scroll {
- SM_UP,
- SM_DOWN,
- };
- enum vc_intensity;
- /**
- * struct consw - callbacks for consoles
- *
- * @con_scroll: move lines from @top to @bottom in direction @dir by @lines.
- * Return true if no generic handling should be done.
- * Invoked by csi_M and printing to the console.
- * @con_set_palette: sets the palette of the console to @table (optional)
- * @con_scrolldelta: the contents of the console should be scrolled by @lines.
- * Invoked by user. (optional)
- */
- struct consw {
- struct module *owner;
- const char *(*con_startup)(void);
- void (*con_init)(struct vc_data *vc, int init);
- void (*con_deinit)(struct vc_data *vc);
- void (*con_clear)(struct vc_data *vc, int sy, int sx, int height,
- int width);
- void (*con_putc)(struct vc_data *vc, int c, int ypos, int xpos);
- void (*con_putcs)(struct vc_data *vc, const unsigned short *s,
- int count, int ypos, int xpos);
- void (*con_cursor)(struct vc_data *vc, int mode);
- bool (*con_scroll)(struct vc_data *vc, unsigned int top,
- unsigned int bottom, enum con_scroll dir,
- unsigned int lines);
- int (*con_switch)(struct vc_data *vc);
- int (*con_blank)(struct vc_data *vc, int blank, int mode_switch);
- int (*con_font_set)(struct vc_data *vc, struct console_font *font,
- unsigned int flags);
- int (*con_font_get)(struct vc_data *vc, struct console_font *font);
- int (*con_font_default)(struct vc_data *vc,
- struct console_font *font, char *name);
- int (*con_resize)(struct vc_data *vc, unsigned int width,
- unsigned int height, unsigned int user);
- void (*con_set_palette)(struct vc_data *vc,
- const unsigned char *table);
- void (*con_scrolldelta)(struct vc_data *vc, int lines);
- int (*con_set_origin)(struct vc_data *vc);
- void (*con_save_screen)(struct vc_data *vc);
- u8 (*con_build_attr)(struct vc_data *vc, u8 color,
- enum vc_intensity intensity,
- bool blink, bool underline, bool reverse, bool italic);
- void (*con_invert_region)(struct vc_data *vc, u16 *p, int count);
- u16 *(*con_screen_pos)(const struct vc_data *vc, int offset);
- unsigned long (*con_getxy)(struct vc_data *vc, unsigned long position,
- int *px, int *py);
- /*
- * Flush the video console driver's scrollback buffer
- */
- void (*con_flush_scrollback)(struct vc_data *vc);
- /*
- * 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 *vc);
- /*
- * Restore the console to its pre-debug state as closely as possible.
- */
- int (*con_debug_leave)(struct vc_data *vc);
- };
- 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 */
- 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
- /* 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) /* Preferred console, /dev/console */
- #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 */
- #define CON_EXTENDED (64) /* Use the extended output format a la /dev/kmsg */
- 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 (*exit)(struct console *);
- int (*match)(struct console *, char *name, int idx, char *options);
- short flags;
- short index;
- int cflag;
- uint ispeed;
- uint ospeed;
- u64 seq;
- unsigned long dropped;
- 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;
- enum con_flush_mode {
- CONSOLE_FLUSH_PENDING,
- CONSOLE_REPLAY_ALL,
- };
- 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 void console_flush_on_panic(enum con_flush_mode mode);
- 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 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 */
- #define WARN_CONSOLE_UNLOCKED() \
- WARN_ON(!atomic_read(&ignore_console_lock_warning) && \
- !is_console_locked() && !oops_in_progress)
- /*
- * Increment ignore_console_lock_warning if you need to quiet
- * WARN_CONSOLE_UNLOCKED() for debugging purposes.
- */
- extern atomic_t ignore_console_lock_warning;
- /* VESA Blanking Levels */
- #define VESA_NO_BLANKING 0
- #define VESA_VSYNC_SUSPEND 1
- #define VESA_HSYNC_SUSPEND 2
- #define VESA_POWERDOWN 3
- extern void console_init(void);
- /* For deferred console takeover */
- void dummycon_register_output_notifier(struct notifier_block *nb);
- void dummycon_unregister_output_notifier(struct notifier_block *nb);
- #endif /* _LINUX_CONSOLE_H */
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