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 struct console_font; 23 struct module; 24 25 /* 26 * this is what the terminal answers to a ESC-Z or csi0c query. 27 */ 28 #define VT100ID "\033[?1;2c" 29 #define VT102ID "\033[?6c" 30 31 struct consw { 32 struct module *owner; 33 const char *(*con_startup)(void); 34 void (*con_init)(struct vc_data *, int); 35 void (*con_deinit)(struct vc_data *); 36 void (*con_clear)(struct vc_data *, int, int, int, int); 37 void (*con_putc)(struct vc_data *, int, int, int); 38 void (*con_putcs)(struct vc_data *, const unsigned short *, int, int, int); 39 void (*con_cursor)(struct vc_data *, int); 40 int (*con_scroll)(struct vc_data *, int, int, int, int); 41 void (*con_bmove)(struct vc_data *, int, int, int, int, int, int); 42 int (*con_switch)(struct vc_data *); 43 int (*con_blank)(struct vc_data *, int, int); 44 int (*con_font_set)(struct vc_data *, struct console_font *, unsigned); 45 int (*con_font_get)(struct vc_data *, struct console_font *); 46 int (*con_font_default)(struct vc_data *, struct console_font *, char *); 47 int (*con_font_copy)(struct vc_data *, int); 48 int (*con_resize)(struct vc_data *, unsigned int, unsigned int); 49 int (*con_set_palette)(struct vc_data *, unsigned char *); 50 int (*con_scrolldelta)(struct vc_data *, int); 51 int (*con_set_origin)(struct vc_data *); 52 void (*con_save_screen)(struct vc_data *); 53 u8 (*con_build_attr)(struct vc_data *, u8, u8, u8, u8, u8); 54 void (*con_invert_region)(struct vc_data *, u16 *, int); 55 u16 *(*con_screen_pos)(struct vc_data *, int); 56 unsigned long (*con_getxy)(struct vc_data *, unsigned long, int *, int *); 57 }; 58 59 extern const struct consw *conswitchp; 60 61 extern const struct consw dummy_con; /* dummy console buffer */ 62 extern const struct consw vga_con; /* VGA text console */ 63 extern const struct consw newport_con; /* SGI Newport console */ 64 extern const struct consw prom_con; /* SPARC PROM console */ 65 66 int con_is_bound(const struct consw *csw); 67 int register_con_driver(const struct consw *csw, int first, int last); 68 int unregister_con_driver(const struct consw *csw); 69 int take_over_console(const struct consw *sw, int first, int last, int deflt); 70 void give_up_console(const struct consw *sw); 71 /* scroll */ 72 #define SM_UP (1) 73 #define SM_DOWN (2) 74 75 /* cursor */ 76 #define CM_DRAW (1) 77 #define CM_ERASE (2) 78 #define CM_MOVE (3) 79 80 /* 81 * The interface for a console, or any other device that wants to capture 82 * console messages (printer driver?) 83 * 84 * If a console driver is marked CON_BOOT then it will be auto-unregistered 85 * when the first real console is registered. This is for early-printk drivers. 86 */ 87 88 #define CON_PRINTBUFFER (1) 89 #define CON_CONSDEV (2) /* Last on the command line */ 90 #define CON_ENABLED (4) 91 #define CON_BOOT (8) 92 #define CON_ANYTIME (16) /* Safe to call when cpu is offline */ 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 int add_preferred_console(char *name, int idx, char *options); 110 extern void register_console(struct console *); 111 extern int unregister_console(struct console *); 112 extern struct console *console_drivers; 113 extern void acquire_console_sem(void); 114 extern int try_acquire_console_sem(void); 115 extern void release_console_sem(void); 116 extern void console_conditional_schedule(void); 117 extern void console_unblank(void); 118 extern struct tty_driver *console_device(int *); 119 extern void console_stop(struct console *); 120 extern void console_start(struct console *); 121 extern int is_console_locked(void); 122 123 /* Suspend and resume console messages over PM events */ 124 extern void suspend_console(void); 125 extern void resume_console(void); 126 127 /* Some debug stub to catch some of the obvious races in the VT code */ 128 #if 1 129 #define WARN_CONSOLE_UNLOCKED() WARN_ON(!is_console_locked() && !oops_in_progress) 130 #else 131 #define WARN_CONSOLE_UNLOCKED() 132 #endif 133 134 /* VESA Blanking Levels */ 135 #define VESA_NO_BLANKING 0 136 #define VESA_VSYNC_SUSPEND 1 137 #define VESA_HSYNC_SUSPEND 2 138 #define VESA_POWERDOWN 3 139 140 #endif /* _LINUX_CONSOLE_H */ 141