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 19 struct vc_data; 20 struct console_font_op; 21 struct console_font; 22 struct module; 23 struct tty_struct; 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 enum con_scroll { 32 SM_UP, 33 SM_DOWN, 34 }; 35 36 /** 37 * struct consw - callbacks for consoles 38 * 39 * @con_scroll: move lines from @top to @bottom in direction @dir by @lines. 40 * Return true if no generic handling should be done. 41 * Invoked by csi_M and printing to the console. 42 * @con_set_palette: sets the palette of the console to @table (optional) 43 * @con_scrolldelta: the contents of the console should be scrolled by @lines. 44 * Invoked by user. (optional) 45 */ 46 struct consw { 47 struct module *owner; 48 const char *(*con_startup)(void); 49 void (*con_init)(struct vc_data *, int); 50 void (*con_deinit)(struct vc_data *); 51 void (*con_clear)(struct vc_data *, int, int, int, int); 52 void (*con_putc)(struct vc_data *, int, int, int); 53 void (*con_putcs)(struct vc_data *, const unsigned short *, int, int, int); 54 void (*con_cursor)(struct vc_data *, int); 55 bool (*con_scroll)(struct vc_data *, unsigned int top, 56 unsigned int bottom, enum con_scroll dir, 57 unsigned int lines); 58 int (*con_switch)(struct vc_data *); 59 int (*con_blank)(struct vc_data *, int, int); 60 int (*con_font_set)(struct vc_data *, struct console_font *, unsigned); 61 int (*con_font_get)(struct vc_data *, struct console_font *); 62 int (*con_font_default)(struct vc_data *, struct console_font *, char *); 63 int (*con_font_copy)(struct vc_data *, int); 64 int (*con_resize)(struct vc_data *, unsigned int, unsigned int, 65 unsigned int); 66 void (*con_set_palette)(struct vc_data *, 67 const unsigned char *table); 68 void (*con_scrolldelta)(struct vc_data *, int lines); 69 int (*con_set_origin)(struct vc_data *); 70 void (*con_save_screen)(struct vc_data *); 71 u8 (*con_build_attr)(struct vc_data *, u8, u8, u8, u8, u8, u8); 72 void (*con_invert_region)(struct vc_data *, u16 *, int); 73 u16 *(*con_screen_pos)(struct vc_data *, int); 74 unsigned long (*con_getxy)(struct vc_data *, unsigned long, int *, int *); 75 /* 76 * Flush the video console driver's scrollback buffer 77 */ 78 void (*con_flush_scrollback)(struct vc_data *); 79 /* 80 * Prepare the console for the debugger. This includes, but is not 81 * limited to, unblanking the console, loading an appropriate 82 * palette, and allowing debugger generated output. 83 */ 84 int (*con_debug_enter)(struct vc_data *); 85 /* 86 * Restore the console to its pre-debug state as closely as possible. 87 */ 88 int (*con_debug_leave)(struct vc_data *); 89 }; 90 91 extern const struct consw *conswitchp; 92 93 extern const struct consw dummy_con; /* dummy console buffer */ 94 extern const struct consw vga_con; /* VGA text console */ 95 extern const struct consw newport_con; /* SGI Newport console */ 96 extern const struct consw prom_con; /* SPARC PROM console */ 97 98 int con_is_bound(const struct consw *csw); 99 int do_unregister_con_driver(const struct consw *csw); 100 int do_take_over_console(const struct consw *sw, int first, int last, int deflt); 101 void give_up_console(const struct consw *sw); 102 #ifdef CONFIG_HW_CONSOLE 103 int con_debug_enter(struct vc_data *vc); 104 int con_debug_leave(void); 105 #else 106 static inline int con_debug_enter(struct vc_data *vc) 107 { 108 return 0; 109 } 110 static inline int con_debug_leave(void) 111 { 112 return 0; 113 } 114 #endif 115 116 /* cursor */ 117 #define CM_DRAW (1) 118 #define CM_ERASE (2) 119 #define CM_MOVE (3) 120 121 /* 122 * The interface for a console, or any other device that wants to capture 123 * console messages (printer driver?) 124 * 125 * If a console driver is marked CON_BOOT then it will be auto-unregistered 126 * when the first real console is registered. This is for early-printk drivers. 127 */ 128 129 #define CON_PRINTBUFFER (1) 130 #define CON_CONSDEV (2) /* Last on the command line */ 131 #define CON_ENABLED (4) 132 #define CON_BOOT (8) 133 #define CON_ANYTIME (16) /* Safe to call when cpu is offline */ 134 #define CON_BRL (32) /* Used for a braille device */ 135 #define CON_EXTENDED (64) /* Use the extended output format a la /dev/kmsg */ 136 137 struct console { 138 char name[16]; 139 void (*write)(struct console *, const char *, unsigned); 140 int (*read)(struct console *, char *, unsigned); 141 struct tty_driver *(*device)(struct console *, int *); 142 void (*unblank)(void); 143 int (*setup)(struct console *, char *); 144 int (*match)(struct console *, char *name, int idx, char *options); 145 short flags; 146 short index; 147 int cflag; 148 void *data; 149 struct console *next; 150 }; 151 152 /* 153 * for_each_console() allows you to iterate on each console 154 */ 155 #define for_each_console(con) \ 156 for (con = console_drivers; con != NULL; con = con->next) 157 158 extern int console_set_on_cmdline; 159 extern struct console *early_console; 160 161 extern int add_preferred_console(char *name, int idx, char *options); 162 extern void register_console(struct console *); 163 extern int unregister_console(struct console *); 164 extern struct console *console_drivers; 165 extern void console_lock(void); 166 extern int console_trylock(void); 167 extern void console_unlock(void); 168 extern void console_conditional_schedule(void); 169 extern void console_unblank(void); 170 extern void console_flush_on_panic(void); 171 extern struct tty_driver *console_device(int *); 172 extern void console_stop(struct console *); 173 extern void console_start(struct console *); 174 extern int is_console_locked(void); 175 extern int braille_register_console(struct console *, int index, 176 char *console_options, char *braille_options); 177 extern int braille_unregister_console(struct console *); 178 #ifdef CONFIG_TTY 179 extern void console_sysfs_notify(void); 180 #else 181 static inline void console_sysfs_notify(void) 182 { } 183 #endif 184 extern bool console_suspend_enabled; 185 186 /* Suspend and resume console messages over PM events */ 187 extern void suspend_console(void); 188 extern void resume_console(void); 189 190 int mda_console_init(void); 191 void prom_con_init(void); 192 193 void vcs_make_sysfs(int index); 194 void vcs_remove_sysfs(int index); 195 196 /* Some debug stub to catch some of the obvious races in the VT code */ 197 #if 1 198 #define WARN_CONSOLE_UNLOCKED() WARN_ON(!is_console_locked() && !oops_in_progress) 199 #else 200 #define WARN_CONSOLE_UNLOCKED() 201 #endif 202 203 /* VESA Blanking Levels */ 204 #define VESA_NO_BLANKING 0 205 #define VESA_VSYNC_SUSPEND 1 206 #define VESA_HSYNC_SUSPEND 2 207 #define VESA_POWERDOWN 3 208 209 #ifdef CONFIG_VGA_CONSOLE 210 extern bool vgacon_text_force(void); 211 #else 212 static inline bool vgacon_text_force(void) { return false; } 213 #endif 214 215 extern void console_init(void); 216 217 #endif /* _LINUX_CONSOLE_H */ 218