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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/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 *);

};

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 register_con_driver(const struct consw *csw, int first, int last);

int unregister_con_driver(const struct consw *csw);

int take_over_console(const struct consw *sw, int first, int last, int deflt);

void give_up_console(const struct consw *sw);

/* 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 */

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     (*early_setup)(void);

        short   flags;

        short   index;

        int     cflag;

        void    *data;

        struct   console *next;

};

extern int add_preferred_console(char *name, int idx, char *options);

extern int update_console_cmdline(char *name, int idx, char *name_new, int idx_new, char *options);

extern void register_console(struct console *);

extern int unregister_console(struct console *);

extern struct console *console_drivers;

extern void acquire_console_sem(void);

extern int try_acquire_console_sem(void);

extern void release_console_sem(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 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(struct tty_struct *tty);

void vcs_remove_sysfs(struct tty_struct *tty);

/* 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

#endif /* _LINUX_CONSOLE_H */