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c7cef0a849
Add match() method to struct console which allows the console to perform console command line matching instead of (or in addition to) default console matching (ie., by fixed name and index). The match() method returns 0 to indicate a successful match; normal console matching occurs if no match() method is defined or the match() method returns non-zero. The match() method is expected to set the console index if required. Re-implement earlycon-to-console-handoff with direct matching of "console=uart|uart8250,..." to the 8250 ttyS console. Acked-by: Rob Herring <robh@kernel.org> Signed-off-by: Peter Hurley <peter@hurleysoftware.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
195 lines
6.0 KiB
C
195 lines
6.0 KiB
C
/*
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* linux/include/linux/console.h
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*
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* Copyright (C) 1993 Hamish Macdonald
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*
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* This file is subject to the terms and conditions of the GNU General Public
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* License. See the file COPYING in the main directory of this archive
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* for more details.
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*
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* Changed:
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* 10-Mar-94: Arno Griffioen: Conversion for vt100 emulator port from PC LINUX
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*/
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#ifndef _LINUX_CONSOLE_H_
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#define _LINUX_CONSOLE_H_ 1
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#include <linux/types.h>
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struct vc_data;
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struct console_font_op;
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struct console_font;
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struct module;
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struct tty_struct;
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/*
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* this is what the terminal answers to a ESC-Z or csi0c query.
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*/
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#define VT100ID "\033[?1;2c"
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#define VT102ID "\033[?6c"
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struct consw {
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struct module *owner;
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const char *(*con_startup)(void);
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void (*con_init)(struct vc_data *, int);
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void (*con_deinit)(struct vc_data *);
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void (*con_clear)(struct vc_data *, int, int, int, int);
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void (*con_putc)(struct vc_data *, int, int, int);
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void (*con_putcs)(struct vc_data *, const unsigned short *, int, int, int);
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void (*con_cursor)(struct vc_data *, int);
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int (*con_scroll)(struct vc_data *, int, int, int, int);
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void (*con_bmove)(struct vc_data *, int, int, int, int, int, int);
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int (*con_switch)(struct vc_data *);
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int (*con_blank)(struct vc_data *, int, int);
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int (*con_font_set)(struct vc_data *, struct console_font *, unsigned);
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int (*con_font_get)(struct vc_data *, struct console_font *);
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int (*con_font_default)(struct vc_data *, struct console_font *, char *);
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int (*con_font_copy)(struct vc_data *, int);
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int (*con_resize)(struct vc_data *, unsigned int, unsigned int,
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unsigned int);
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int (*con_set_palette)(struct vc_data *, unsigned char *);
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int (*con_scrolldelta)(struct vc_data *, int);
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int (*con_set_origin)(struct vc_data *);
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void (*con_save_screen)(struct vc_data *);
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u8 (*con_build_attr)(struct vc_data *, u8, u8, u8, u8, u8, u8);
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void (*con_invert_region)(struct vc_data *, u16 *, int);
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u16 *(*con_screen_pos)(struct vc_data *, int);
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unsigned long (*con_getxy)(struct vc_data *, unsigned long, int *, int *);
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/*
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* Prepare the console for the debugger. This includes, but is not
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* limited to, unblanking the console, loading an appropriate
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* palette, and allowing debugger generated output.
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*/
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int (*con_debug_enter)(struct vc_data *);
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/*
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* Restore the console to its pre-debug state as closely as possible.
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*/
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int (*con_debug_leave)(struct vc_data *);
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};
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extern const struct consw *conswitchp;
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extern const struct consw dummy_con; /* dummy console buffer */
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extern const struct consw vga_con; /* VGA text console */
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extern const struct consw newport_con; /* SGI Newport console */
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extern const struct consw prom_con; /* SPARC PROM console */
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int con_is_bound(const struct consw *csw);
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int do_unregister_con_driver(const struct consw *csw);
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int do_take_over_console(const struct consw *sw, int first, int last, int deflt);
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void give_up_console(const struct consw *sw);
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#ifdef CONFIG_HW_CONSOLE
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int con_debug_enter(struct vc_data *vc);
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int con_debug_leave(void);
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#else
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static inline int con_debug_enter(struct vc_data *vc)
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{
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return 0;
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}
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static inline int con_debug_leave(void)
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{
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return 0;
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}
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#endif
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/* scroll */
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#define SM_UP (1)
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#define SM_DOWN (2)
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/* cursor */
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#define CM_DRAW (1)
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#define CM_ERASE (2)
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#define CM_MOVE (3)
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/*
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* The interface for a console, or any other device that wants to capture
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* console messages (printer driver?)
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*
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* If a console driver is marked CON_BOOT then it will be auto-unregistered
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* when the first real console is registered. This is for early-printk drivers.
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*/
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#define CON_PRINTBUFFER (1)
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#define CON_CONSDEV (2) /* Last on the command line */
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#define CON_ENABLED (4)
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#define CON_BOOT (8)
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#define CON_ANYTIME (16) /* Safe to call when cpu is offline */
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#define CON_BRL (32) /* Used for a braille device */
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struct console {
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char name[16];
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void (*write)(struct console *, const char *, unsigned);
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int (*read)(struct console *, char *, unsigned);
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struct tty_driver *(*device)(struct console *, int *);
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void (*unblank)(void);
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int (*setup)(struct console *, char *);
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int (*match)(struct console *, char *name, int idx, char *options);
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short flags;
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short index;
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int cflag;
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void *data;
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struct console *next;
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};
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/*
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* for_each_console() allows you to iterate on each console
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*/
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#define for_each_console(con) \
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for (con = console_drivers; con != NULL; con = con->next)
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extern int console_set_on_cmdline;
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extern struct console *early_console;
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extern int add_preferred_console(char *name, int idx, char *options);
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extern void register_console(struct console *);
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extern int unregister_console(struct console *);
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extern struct console *console_drivers;
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extern void console_lock(void);
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extern int console_trylock(void);
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extern void console_unlock(void);
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extern void console_conditional_schedule(void);
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extern void console_unblank(void);
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extern struct tty_driver *console_device(int *);
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extern void console_stop(struct console *);
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extern void console_start(struct console *);
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extern int is_console_locked(void);
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extern int braille_register_console(struct console *, int index,
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char *console_options, char *braille_options);
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extern int braille_unregister_console(struct console *);
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#ifdef CONFIG_TTY
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extern void console_sysfs_notify(void);
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#else
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static inline void console_sysfs_notify(void)
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{ }
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#endif
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extern bool console_suspend_enabled;
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/* Suspend and resume console messages over PM events */
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extern void suspend_console(void);
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extern void resume_console(void);
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int mda_console_init(void);
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void prom_con_init(void);
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void vcs_make_sysfs(int index);
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void vcs_remove_sysfs(int index);
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/* Some debug stub to catch some of the obvious races in the VT code */
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#if 1
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#define WARN_CONSOLE_UNLOCKED() WARN_ON(!is_console_locked() && !oops_in_progress)
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#else
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#define WARN_CONSOLE_UNLOCKED()
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#endif
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/* VESA Blanking Levels */
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#define VESA_NO_BLANKING 0
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#define VESA_VSYNC_SUSPEND 1
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#define VESA_HSYNC_SUSPEND 2
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#define VESA_POWERDOWN 3
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#ifdef CONFIG_VGA_CONSOLE
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extern bool vgacon_text_force(void);
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#endif
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#endif /* _LINUX_CONSOLE_H */
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