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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>
#include <linux/spinlock.h>

struct vc_data;
struct console_font_op;

/*
 * this is what the terminal answers to a ESC-Z or csi0c query.
 */
#define VT100ID "\033[?1;2c"
#define VT102ID "\033[?6c"

struct consw {
        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     (*con_font_op)(struct vc_data *, struct console_font_op *);
        int     (*con_resize)(struct vc_data *, 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);
        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 fb_con;       /* frame buffer based console */
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 */

void 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)

/*
 *      Array of consoles built from command line options (console=)
 */
struct console_cmdline
{
        char    name[8];                        /* Name of the driver       */
        int     index;                          /* Minor dev. to use        */
        char    *options;                       /* Options for the driver   */
};
#define MAX_CMDLINECONSOLES 8
extern struct console_cmdline console_list[MAX_CMDLINECONSOLES];

/*
 *      The interface for a console, or any other device that
 *      wants to capture console messages (printer driver?)
 */

#define CON_PRINTBUFFER (1)
#define CON_CONSDEV     (2) /* Last on the command line */
#define CON_ENABLED     (4)

struct console
{
        char    name[8];
        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 *);
        short   flags;
        short   index;
        int     cflag;
        void    *data;
        struct   console *next;
};

extern void register_console(struct console *);
extern int unregister_console(struct console *);
extern struct console *console_drivers;
extern void acquire_console_sem(void);
extern void release_console_sem(void);
extern void console_conditional_schedule(void);
extern void console_unblank(void);

/* 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 */