include/linux/console.h

   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 #include <linux/spinlock.h>
  19
  20 struct vc_data;
  21 struct console_font_op;
  22
  23 /*
  24  * this is what the terminal answers to a ESC-Z or csi0c query.
  25  */
  26 #define VT100ID "\033[?1;2c"
  27 #define VT102ID "\033[?6c"
  28
  29 struct consw {
  30         const char *(*con_startup)(void);
  31         void    (*con_init)(struct vc_data *, int);
  32         void    (*con_deinit)(struct vc_data *);
  33         void    (*con_clear)(struct vc_data *, int, int, int, int);
  34         void    (*con_putc)(struct vc_data *, int, int, int);
  35         void    (*con_putcs)(struct vc_data *, const unsigned short *, int, int, int);
  36         void    (*con_cursor)(struct vc_data *, int);
  37         int     (*con_scroll)(struct vc_data *, int, int, int, int);
  38         void    (*con_bmove)(struct vc_data *, int, int, int, int, int, int);
  39         int     (*con_switch)(struct vc_data *);
  40         int     (*con_blank)(struct vc_data *, int);
  41         int     (*con_font_op)(struct vc_data *, struct console_font_op *);
  42         int     (*con_resize)(struct vc_data *, unsigned int, unsigned int);
  43         int     (*con_set_palette)(struct vc_data *, unsigned char *);
  44         int     (*con_scrolldelta)(struct vc_data *, int);
  45         int     (*con_set_origin)(struct vc_data *);
  46         void    (*con_save_screen)(struct vc_data *);
  47         u8      (*con_build_attr)(struct vc_data *, u8, u8, u8, u8, u8);
  48         void    (*con_invert_region)(struct vc_data *, u16 *, int);
  49         u16    *(*con_screen_pos)(struct vc_data *, int);
  50         unsigned long (*con_getxy)(struct vc_data *, unsigned long, int *, int *);
  51 };
  52
  53 extern const struct consw *conswitchp;
  54
  55 extern const struct consw dummy_con;    /* dummy console buffer */
  56 extern const struct consw fb_con;       /* frame buffer based console */
  57 extern const struct consw vga_con;      /* VGA text console */
  58 extern const struct consw newport_con;  /* SGI Newport console  */
  59 extern const struct consw prom_con;     /* SPARC PROM console */
  60
  61 void take_over_console(const struct consw *sw, int first, int last, int deflt);
  62 void give_up_console(const struct consw *sw);
  63
  64 /* scroll */
  65 #define SM_UP       (1)
  66 #define SM_DOWN     (2)
  67
  68 /* cursor */
  69 #define CM_DRAW     (1)
  70 #define CM_ERASE    (2)
  71 #define CM_MOVE     (3)
  72
  73 /*
  74  *      Array of consoles built from command line options (console=)
  75  */
  76 struct console_cmdline
  77 {
  78         char    name[8];                        /* Name of the driver       */
  79         int     index;                          /* Minor dev. to use        */
  80         char    *options;                       /* Options for the driver   */
  81 };
  82 #define MAX_CMDLINECONSOLES 8
  83 extern struct console_cmdline console_list[MAX_CMDLINECONSOLES];
  84
  85 /*
  86  *      The interface for a console, or any other device that
  87  *      wants to capture console messages (printer driver?)
  88  */
  89
  90 #define CON_PRINTBUFFER (1)
  91 #define CON_CONSDEV     (2) /* Last on the command line */
  92 #define CON_ENABLED     (4)
  93
  94 struct console
  95 {
  96         char    name[8];
  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         short   flags;
 103         short   index;
 104         int     cflag;
 105         void    *data;
 106         struct   console *next;
 107 };
 108
 109 extern void register_console(struct console *);
 110 extern int unregister_console(struct console *);
 111 extern struct console *console_drivers;
 112 extern void acquire_console_sem(void);
 113 extern void release_console_sem(void);
 114 extern void console_conditional_schedule(void);
 115 extern void console_unblank(void);
 116
 117 /* VESA Blanking Levels */
 118 #define VESA_NO_BLANKING        0
 119 #define VESA_VSYNC_SUSPEND      1
 120 #define VESA_HSYNC_SUSPEND      2
 121 #define VESA_POWERDOWN          3
 122
 123 #endif /* _LINUX_CONSOLE_H */