v4.19.13 snapshot.
diff --git a/include/linux/console.h b/include/linux/console.h
new file mode 100644
index 0000000..ec9bdb3
--- /dev/null
+++ b/include/linux/console.h
@@ -0,0 +1,232 @@
+/*
+ * 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/atomic.h>
+#include <linux/types.h>
+
+struct vc_data;
+struct console_font_op;
+struct console_font;
+struct module;
+struct tty_struct;
+struct notifier_block;
+
+/*
+ * this is what the terminal answers to a ESC-Z or csi0c query.
+ */
+#define VT100ID "\033[?1;2c"
+#define VT102ID "\033[?6c"
+
+enum con_scroll {
+ SM_UP,
+ SM_DOWN,
+};
+
+/**
+ * struct consw - callbacks for consoles
+ *
+ * @con_scroll: move lines from @top to @bottom in direction @dir by @lines.
+ * Return true if no generic handling should be done.
+ * Invoked by csi_M and printing to the console.
+ * @con_set_palette: sets the palette of the console to @table (optional)
+ * @con_scrolldelta: the contents of the console should be scrolled by @lines.
+ * Invoked by user. (optional)
+ */
+struct consw {
+ struct module *owner;
+ const char *(*con_startup)(void);
+ void (*con_init)(struct vc_data *vc, int init);
+ void (*con_deinit)(struct vc_data *vc);
+ void (*con_clear)(struct vc_data *vc, int sy, int sx, int height,
+ int width);
+ void (*con_putc)(struct vc_data *vc, int c, int ypos, int xpos);
+ void (*con_putcs)(struct vc_data *vc, const unsigned short *s,
+ int count, int ypos, int xpos);
+ void (*con_cursor)(struct vc_data *vc, int mode);
+ bool (*con_scroll)(struct vc_data *vc, unsigned int top,
+ unsigned int bottom, enum con_scroll dir,
+ unsigned int lines);
+ int (*con_switch)(struct vc_data *vc);
+ int (*con_blank)(struct vc_data *vc, int blank, int mode_switch);
+ int (*con_font_set)(struct vc_data *vc, struct console_font *font,
+ unsigned int flags);
+ int (*con_font_get)(struct vc_data *vc, struct console_font *font);
+ int (*con_font_default)(struct vc_data *vc,
+ struct console_font *font, char *name);
+ int (*con_font_copy)(struct vc_data *vc, int con);
+ int (*con_resize)(struct vc_data *vc, unsigned int width,
+ unsigned int height, unsigned int user);
+ void (*con_set_palette)(struct vc_data *vc,
+ const unsigned char *table);
+ void (*con_scrolldelta)(struct vc_data *vc, int lines);
+ int (*con_set_origin)(struct vc_data *vc);
+ void (*con_save_screen)(struct vc_data *vc);
+ u8 (*con_build_attr)(struct vc_data *vc, u8 color, u8 intensity,
+ u8 blink, u8 underline, u8 reverse, u8 italic);
+ void (*con_invert_region)(struct vc_data *vc, u16 *p, int count);
+ u16 *(*con_screen_pos)(struct vc_data *vc, int offset);
+ unsigned long (*con_getxy)(struct vc_data *vc, unsigned long position,
+ int *px, int *py);
+ /*
+ * Flush the video console driver's scrollback buffer
+ */
+ void (*con_flush_scrollback)(struct vc_data *vc);
+ /*
+ * Prepare the console for the debugger. This includes, but is not
+ * limited to, unblanking the console, loading an appropriate
+ * palette, and allowing debugger generated output.
+ */
+ int (*con_debug_enter)(struct vc_data *vc);
+ /*
+ * Restore the console to its pre-debug state as closely as possible.
+ */
+ int (*con_debug_leave)(struct vc_data *vc);
+};
+
+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 do_unregister_con_driver(const struct consw *csw);
+int do_take_over_console(const struct consw *sw, int first, int last, int deflt);
+void give_up_console(const struct consw *sw);
+#ifdef CONFIG_HW_CONSOLE
+int con_debug_enter(struct vc_data *vc);
+int con_debug_leave(void);
+#else
+static inline int con_debug_enter(struct vc_data *vc)
+{
+ return 0;
+}
+static inline int con_debug_leave(void)
+{
+ return 0;
+}
+#endif
+
+/* 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 */
+#define CON_BRL (32) /* Used for a braille device */
+#define CON_EXTENDED (64) /* Use the extended output format a la /dev/kmsg */
+
+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 (*match)(struct console *, char *name, int idx, char *options);
+ short flags;
+ short index;
+ int cflag;
+ void *data;
+ struct console *next;
+};
+
+/*
+ * for_each_console() allows you to iterate on each console
+ */
+#define for_each_console(con) \
+ for (con = console_drivers; con != NULL; con = con->next)
+
+extern int console_set_on_cmdline;
+extern struct console *early_console;
+
+extern int add_preferred_console(char *name, int idx, char *options);
+extern void register_console(struct console *);
+extern int unregister_console(struct console *);
+extern struct console *console_drivers;
+extern void console_lock(void);
+extern int console_trylock(void);
+extern void console_unlock(void);
+extern void console_conditional_schedule(void);
+extern void console_unblank(void);
+extern void console_flush_on_panic(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 braille_register_console(struct console *, int index,
+ char *console_options, char *braille_options);
+extern int braille_unregister_console(struct console *);
+#ifdef CONFIG_TTY
+extern void console_sysfs_notify(void);
+#else
+static inline void console_sysfs_notify(void)
+{ }
+#endif
+extern bool 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(int index);
+void vcs_remove_sysfs(int index);
+
+/* Some debug stub to catch some of the obvious races in the VT code */
+#define WARN_CONSOLE_UNLOCKED() \
+ WARN_ON(!atomic_read(&ignore_console_lock_warning) && \
+ !is_console_locked() && !oops_in_progress)
+/*
+ * Increment ignore_console_lock_warning if you need to quiet
+ * WARN_CONSOLE_UNLOCKED() for debugging purposes.
+ */
+extern atomic_t ignore_console_lock_warning;
+
+/* VESA Blanking Levels */
+#define VESA_NO_BLANKING 0
+#define VESA_VSYNC_SUSPEND 1
+#define VESA_HSYNC_SUSPEND 2
+#define VESA_POWERDOWN 3
+
+#ifdef CONFIG_VGA_CONSOLE
+extern bool vgacon_text_force(void);
+#else
+static inline bool vgacon_text_force(void) { return false; }
+#endif
+
+extern void console_init(void);
+
+/* For deferred console takeover */
+void dummycon_register_output_notifier(struct notifier_block *nb);
+void dummycon_unregister_output_notifier(struct notifier_block *nb);
+
+#endif /* _LINUX_CONSOLE_H */