3968 lines
94 KiB
C
3968 lines
94 KiB
C
/*
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* linux/drivers/char/vt.c
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*
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* Copyright (C) 1991, 1992 Linus Torvalds
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*/
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/*
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* Hopefully this will be a rather complete VT102 implementation.
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*
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* Beeping thanks to John T Kohl.
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*
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* Virtual Consoles, Screen Blanking, Screen Dumping, Color, Graphics
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* Chars, and VT100 enhancements by Peter MacDonald.
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*
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* Copy and paste function by Andrew Haylett,
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* some enhancements by Alessandro Rubini.
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*
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* Code to check for different video-cards mostly by Galen Hunt,
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* <g-hunt@ee.utah.edu>
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*
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* Rudimentary ISO 10646/Unicode/UTF-8 character set support by
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* Markus Kuhn, <mskuhn@immd4.informatik.uni-erlangen.de>.
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*
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* Dynamic allocation of consoles, aeb@cwi.nl, May 1994
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* Resizing of consoles, aeb, 940926
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*
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* Code for xterm like mouse click reporting by Peter Orbaek 20-Jul-94
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* <poe@daimi.aau.dk>
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*
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* User-defined bell sound, new setterm control sequences and printk
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* redirection by Martin Mares <mj@k332.feld.cvut.cz> 19-Nov-95
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*
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* APM screenblank bug fixed Takashi Manabe <manabe@roy.dsl.tutics.tut.jp>
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*
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* Merge with the abstract console driver by Geert Uytterhoeven
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* <geert@linux-m68k.org>, Jan 1997.
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*
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* Original m68k console driver modifications by
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*
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* - Arno Griffioen <arno@usn.nl>
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* - David Carter <carter@cs.bris.ac.uk>
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*
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* The abstract console driver provides a generic interface for a text
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* console. It supports VGA text mode, frame buffer based graphical consoles
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* and special graphics processors that are only accessible through some
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* registers (e.g. a TMS340x0 GSP).
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*
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* The interface to the hardware is specified using a special structure
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* (struct consw) which contains function pointers to console operations
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* (see <linux/console.h> for more information).
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*
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* Support for changeable cursor shape
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* by Pavel Machek <pavel@atrey.karlin.mff.cuni.cz>, August 1997
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*
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* Ported to i386 and con_scrolldelta fixed
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* by Emmanuel Marty <core@ggi-project.org>, April 1998
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*
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* Resurrected character buffers in videoram plus lots of other trickery
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* by Martin Mares <mj@atrey.karlin.mff.cuni.cz>, July 1998
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*
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* Removed old-style timers, introduced console_timer, made timer
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* deletion SMP-safe. 17Jun00, Andrew Morton <andrewm@uow.edu.au>
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*
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* Removed console_lock, enabled interrupts across all console operations
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* 13 March 2001, Andrew Morton
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*
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* Fixed UTF-8 mode so alternate charset modes always work according
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* to control sequences interpreted in do_con_trol function
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* preserving backward VT100 semigraphics compatibility,
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* malformed UTF sequences represented as sequences of replacement glyphs,
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* original codes or '?' as a last resort if replacement glyph is undefined
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* by Adam Tla/lka <atlka@pg.gda.pl>, Aug 2006
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*/
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#include <linux/module.h>
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#include <linux/types.h>
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#include <linux/sched.h>
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#include <linux/tty.h>
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#include <linux/tty_flip.h>
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#include <linux/kernel.h>
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#include <linux/string.h>
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#include <linux/errno.h>
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#include <linux/kd.h>
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#include <linux/slab.h>
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#include <linux/major.h>
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#include <linux/mm.h>
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#include <linux/console.h>
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#include <linux/init.h>
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#include <linux/mutex.h>
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#include <linux/vt_kern.h>
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#include <linux/selection.h>
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#include <linux/tiocl.h>
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#include <linux/kbd_kern.h>
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#include <linux/consolemap.h>
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#include <linux/timer.h>
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#include <linux/interrupt.h>
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#include <linux/workqueue.h>
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#include <linux/bootmem.h>
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#include <linux/pm.h>
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#include <linux/font.h>
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#include <linux/bitops.h>
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#include <asm/io.h>
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#include <asm/system.h>
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#include <asm/uaccess.h>
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#define MAX_NR_CON_DRIVER 16
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#define CON_DRIVER_FLAG_MODULE 1
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#define CON_DRIVER_FLAG_INIT 2
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#define CON_DRIVER_FLAG_ATTR 4
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struct con_driver {
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const struct consw *con;
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const char *desc;
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struct device *dev;
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int node;
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int first;
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int last;
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int flag;
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};
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static struct con_driver registered_con_driver[MAX_NR_CON_DRIVER];
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const struct consw *conswitchp;
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/* A bitmap for codes <32. A bit of 1 indicates that the code
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* corresponding to that bit number invokes some special action
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* (such as cursor movement) and should not be displayed as a
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* glyph unless the disp_ctrl mode is explicitly enabled.
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*/
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#define CTRL_ACTION 0x0d00ff81
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#define CTRL_ALWAYS 0x0800f501 /* Cannot be overridden by disp_ctrl */
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/*
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* Here is the default bell parameters: 750HZ, 1/8th of a second
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*/
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#define DEFAULT_BELL_PITCH 750
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#define DEFAULT_BELL_DURATION (HZ/8)
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struct vc vc_cons [MAX_NR_CONSOLES];
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#ifndef VT_SINGLE_DRIVER
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static const struct consw *con_driver_map[MAX_NR_CONSOLES];
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#endif
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static int con_open(struct tty_struct *, struct file *);
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static void vc_init(struct vc_data *vc, unsigned int rows,
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unsigned int cols, int do_clear);
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static void gotoxy(struct vc_data *vc, int new_x, int new_y);
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static void save_cur(struct vc_data *vc);
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static void reset_terminal(struct vc_data *vc, int do_clear);
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static void con_flush_chars(struct tty_struct *tty);
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static int set_vesa_blanking(char __user *p);
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static void set_cursor(struct vc_data *vc);
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static void hide_cursor(struct vc_data *vc);
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static void console_callback(struct work_struct *ignored);
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static void blank_screen_t(unsigned long dummy);
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static void set_palette(struct vc_data *vc);
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static int printable; /* Is console ready for printing? */
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static int default_utf8;
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module_param(default_utf8, int, S_IRUGO | S_IWUSR);
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/*
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* ignore_poke: don't unblank the screen when things are typed. This is
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* mainly for the privacy of braille terminal users.
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*/
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static int ignore_poke;
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int do_poke_blanked_console;
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int console_blanked;
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static int vesa_blank_mode; /* 0:none 1:suspendV 2:suspendH 3:powerdown */
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static int blankinterval = 10*60*HZ;
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static int vesa_off_interval;
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static DECLARE_WORK(console_work, console_callback);
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/*
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* fg_console is the current virtual console,
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* last_console is the last used one,
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* want_console is the console we want to switch to,
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* kmsg_redirect is the console for kernel messages,
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*/
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int fg_console;
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int last_console;
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int want_console = -1;
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int kmsg_redirect;
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/*
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* For each existing display, we have a pointer to console currently visible
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* on that display, allowing consoles other than fg_console to be refreshed
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* appropriately. Unless the low-level driver supplies its own display_fg
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* variable, we use this one for the "master display".
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*/
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static struct vc_data *master_display_fg;
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/*
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* Unfortunately, we need to delay tty echo when we're currently writing to the
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* console since the code is (and always was) not re-entrant, so we schedule
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* all flip requests to process context with schedule-task() and run it from
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* console_callback().
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*/
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/*
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* For the same reason, we defer scrollback to the console callback.
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*/
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static int scrollback_delta;
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/*
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* Hook so that the power management routines can (un)blank
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* the console on our behalf.
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*/
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int (*console_blank_hook)(int);
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static DEFINE_TIMER(console_timer, blank_screen_t, 0, 0);
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static int blank_state;
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static int blank_timer_expired;
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enum {
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blank_off = 0,
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blank_normal_wait,
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blank_vesa_wait,
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};
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/*
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* Low-Level Functions
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*/
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#define IS_FG(vc) ((vc)->vc_num == fg_console)
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#ifdef VT_BUF_VRAM_ONLY
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#define DO_UPDATE(vc) 0
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#else
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#define DO_UPDATE(vc) CON_IS_VISIBLE(vc)
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#endif
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static inline unsigned short *screenpos(struct vc_data *vc, int offset, int viewed)
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{
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unsigned short *p;
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if (!viewed)
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p = (unsigned short *)(vc->vc_origin + offset);
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else if (!vc->vc_sw->con_screen_pos)
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p = (unsigned short *)(vc->vc_visible_origin + offset);
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else
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p = vc->vc_sw->con_screen_pos(vc, offset);
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return p;
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}
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static inline void scrolldelta(int lines)
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{
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scrollback_delta += lines;
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schedule_console_callback();
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}
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void schedule_console_callback(void)
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{
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schedule_work(&console_work);
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}
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static void scrup(struct vc_data *vc, unsigned int t, unsigned int b, int nr)
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{
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unsigned short *d, *s;
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if (t+nr >= b)
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nr = b - t - 1;
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if (b > vc->vc_rows || t >= b || nr < 1)
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return;
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if (CON_IS_VISIBLE(vc) && vc->vc_sw->con_scroll(vc, t, b, SM_UP, nr))
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return;
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d = (unsigned short *)(vc->vc_origin + vc->vc_size_row * t);
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s = (unsigned short *)(vc->vc_origin + vc->vc_size_row * (t + nr));
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scr_memmovew(d, s, (b - t - nr) * vc->vc_size_row);
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scr_memsetw(d + (b - t - nr) * vc->vc_cols, vc->vc_video_erase_char,
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vc->vc_size_row * nr);
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}
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static void scrdown(struct vc_data *vc, unsigned int t, unsigned int b, int nr)
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{
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unsigned short *s;
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unsigned int step;
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if (t+nr >= b)
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nr = b - t - 1;
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if (b > vc->vc_rows || t >= b || nr < 1)
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return;
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if (CON_IS_VISIBLE(vc) && vc->vc_sw->con_scroll(vc, t, b, SM_DOWN, nr))
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return;
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s = (unsigned short *)(vc->vc_origin + vc->vc_size_row * t);
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step = vc->vc_cols * nr;
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scr_memmovew(s + step, s, (b - t - nr) * vc->vc_size_row);
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scr_memsetw(s, vc->vc_video_erase_char, 2 * step);
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}
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static void do_update_region(struct vc_data *vc, unsigned long start, int count)
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{
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#ifndef VT_BUF_VRAM_ONLY
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unsigned int xx, yy, offset;
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u16 *p;
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p = (u16 *) start;
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if (!vc->vc_sw->con_getxy) {
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offset = (start - vc->vc_origin) / 2;
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xx = offset % vc->vc_cols;
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yy = offset / vc->vc_cols;
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} else {
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int nxx, nyy;
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start = vc->vc_sw->con_getxy(vc, start, &nxx, &nyy);
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xx = nxx; yy = nyy;
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}
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for(;;) {
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u16 attrib = scr_readw(p) & 0xff00;
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int startx = xx;
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u16 *q = p;
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while (xx < vc->vc_cols && count) {
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if (attrib != (scr_readw(p) & 0xff00)) {
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if (p > q)
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vc->vc_sw->con_putcs(vc, q, p-q, yy, startx);
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startx = xx;
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q = p;
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attrib = scr_readw(p) & 0xff00;
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}
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p++;
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xx++;
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count--;
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}
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if (p > q)
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vc->vc_sw->con_putcs(vc, q, p-q, yy, startx);
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if (!count)
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break;
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xx = 0;
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yy++;
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if (vc->vc_sw->con_getxy) {
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p = (u16 *)start;
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start = vc->vc_sw->con_getxy(vc, start, NULL, NULL);
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}
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}
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#endif
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}
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void update_region(struct vc_data *vc, unsigned long start, int count)
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{
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WARN_CONSOLE_UNLOCKED();
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if (DO_UPDATE(vc)) {
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hide_cursor(vc);
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do_update_region(vc, start, count);
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set_cursor(vc);
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}
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}
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/* Structure of attributes is hardware-dependent */
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static u8 build_attr(struct vc_data *vc, u8 _color, u8 _intensity, u8 _blink,
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u8 _underline, u8 _reverse, u8 _italic)
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{
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if (vc->vc_sw->con_build_attr)
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return vc->vc_sw->con_build_attr(vc, _color, _intensity,
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_blink, _underline, _reverse, _italic);
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#ifndef VT_BUF_VRAM_ONLY
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/*
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* ++roman: I completely changed the attribute format for monochrome
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* mode (!can_do_color). The formerly used MDA (monochrome display
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* adapter) format didn't allow the combination of certain effects.
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* Now the attribute is just a bit vector:
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* Bit 0..1: intensity (0..2)
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* Bit 2 : underline
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* Bit 3 : reverse
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* Bit 7 : blink
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*/
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{
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u8 a = vc->vc_color;
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if (!vc->vc_can_do_color)
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return _intensity |
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(_italic ? 2 : 0) |
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(_underline ? 4 : 0) |
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(_reverse ? 8 : 0) |
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(_blink ? 0x80 : 0);
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if (_italic)
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a = (a & 0xF0) | vc->vc_itcolor;
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else if (_underline)
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a = (a & 0xf0) | vc->vc_ulcolor;
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else if (_intensity == 0)
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a = (a & 0xf0) | vc->vc_ulcolor;
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if (_reverse)
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a = ((a) & 0x88) | ((((a) >> 4) | ((a) << 4)) & 0x77);
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if (_blink)
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a ^= 0x80;
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if (_intensity == 2)
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a ^= 0x08;
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if (vc->vc_hi_font_mask == 0x100)
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a <<= 1;
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return a;
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}
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#else
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return 0;
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#endif
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}
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static void update_attr(struct vc_data *vc)
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{
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vc->vc_attr = build_attr(vc, vc->vc_color, vc->vc_intensity,
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vc->vc_blink, vc->vc_underline,
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vc->vc_reverse ^ vc->vc_decscnm, vc->vc_italic);
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vc->vc_video_erase_char = (build_attr(vc, vc->vc_color, 1, vc->vc_blink, 0, vc->vc_decscnm, 0) << 8) | ' ';
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}
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/* Note: inverting the screen twice should revert to the original state */
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void invert_screen(struct vc_data *vc, int offset, int count, int viewed)
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{
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unsigned short *p;
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WARN_CONSOLE_UNLOCKED();
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count /= 2;
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p = screenpos(vc, offset, viewed);
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if (vc->vc_sw->con_invert_region)
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vc->vc_sw->con_invert_region(vc, p, count);
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#ifndef VT_BUF_VRAM_ONLY
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else {
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u16 *q = p;
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int cnt = count;
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u16 a;
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if (!vc->vc_can_do_color) {
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while (cnt--) {
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a = scr_readw(q);
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a ^= 0x0800;
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scr_writew(a, q);
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q++;
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}
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} else if (vc->vc_hi_font_mask == 0x100) {
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while (cnt--) {
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a = scr_readw(q);
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a = ((a) & 0x11ff) | (((a) & 0xe000) >> 4) | (((a) & 0x0e00) << 4);
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scr_writew(a, q);
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q++;
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}
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} else {
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while (cnt--) {
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a = scr_readw(q);
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a = ((a) & 0x88ff) | (((a) & 0x7000) >> 4) | (((a) & 0x0700) << 4);
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scr_writew(a, q);
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q++;
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}
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}
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}
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#endif
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if (DO_UPDATE(vc))
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do_update_region(vc, (unsigned long) p, count);
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}
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|
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/* used by selection: complement pointer position */
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void complement_pos(struct vc_data *vc, int offset)
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{
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static int old_offset = -1;
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static unsigned short old;
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static unsigned short oldx, oldy;
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WARN_CONSOLE_UNLOCKED();
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if (old_offset != -1 && old_offset >= 0 &&
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old_offset < vc->vc_screenbuf_size) {
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scr_writew(old, screenpos(vc, old_offset, 1));
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if (DO_UPDATE(vc))
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vc->vc_sw->con_putc(vc, old, oldy, oldx);
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}
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old_offset = offset;
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|
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if (offset != -1 && offset >= 0 &&
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offset < vc->vc_screenbuf_size) {
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unsigned short new;
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unsigned short *p;
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p = screenpos(vc, offset, 1);
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old = scr_readw(p);
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new = old ^ vc->vc_complement_mask;
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scr_writew(new, p);
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if (DO_UPDATE(vc)) {
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oldx = (offset >> 1) % vc->vc_cols;
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oldy = (offset >> 1) / vc->vc_cols;
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vc->vc_sw->con_putc(vc, new, oldy, oldx);
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}
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}
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}
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static void insert_char(struct vc_data *vc, unsigned int nr)
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{
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unsigned short *p, *q = (unsigned short *)vc->vc_pos;
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|
|
|
p = q + vc->vc_cols - nr - vc->vc_x;
|
|
while (--p >= q)
|
|
scr_writew(scr_readw(p), p + nr);
|
|
scr_memsetw(q, vc->vc_video_erase_char, nr * 2);
|
|
vc->vc_need_wrap = 0;
|
|
if (DO_UPDATE(vc)) {
|
|
unsigned short oldattr = vc->vc_attr;
|
|
vc->vc_sw->con_bmove(vc, vc->vc_y, vc->vc_x, vc->vc_y, vc->vc_x + nr, 1,
|
|
vc->vc_cols - vc->vc_x - nr);
|
|
vc->vc_attr = vc->vc_video_erase_char >> 8;
|
|
while (nr--)
|
|
vc->vc_sw->con_putc(vc, vc->vc_video_erase_char, vc->vc_y, vc->vc_x + nr);
|
|
vc->vc_attr = oldattr;
|
|
}
|
|
}
|
|
|
|
static void delete_char(struct vc_data *vc, unsigned int nr)
|
|
{
|
|
unsigned int i = vc->vc_x;
|
|
unsigned short *p = (unsigned short *)vc->vc_pos;
|
|
|
|
while (++i <= vc->vc_cols - nr) {
|
|
scr_writew(scr_readw(p+nr), p);
|
|
p++;
|
|
}
|
|
scr_memsetw(p, vc->vc_video_erase_char, nr * 2);
|
|
vc->vc_need_wrap = 0;
|
|
if (DO_UPDATE(vc)) {
|
|
unsigned short oldattr = vc->vc_attr;
|
|
vc->vc_sw->con_bmove(vc, vc->vc_y, vc->vc_x + nr, vc->vc_y, vc->vc_x, 1,
|
|
vc->vc_cols - vc->vc_x - nr);
|
|
vc->vc_attr = vc->vc_video_erase_char >> 8;
|
|
while (nr--)
|
|
vc->vc_sw->con_putc(vc, vc->vc_video_erase_char, vc->vc_y,
|
|
vc->vc_cols - 1 - nr);
|
|
vc->vc_attr = oldattr;
|
|
}
|
|
}
|
|
|
|
static int softcursor_original;
|
|
|
|
static void add_softcursor(struct vc_data *vc)
|
|
{
|
|
int i = scr_readw((u16 *) vc->vc_pos);
|
|
u32 type = vc->vc_cursor_type;
|
|
|
|
if (! (type & 0x10)) return;
|
|
if (softcursor_original != -1) return;
|
|
softcursor_original = i;
|
|
i |= ((type >> 8) & 0xff00 );
|
|
i ^= ((type) & 0xff00 );
|
|
if ((type & 0x20) && ((softcursor_original & 0x7000) == (i & 0x7000))) i ^= 0x7000;
|
|
if ((type & 0x40) && ((i & 0x700) == ((i & 0x7000) >> 4))) i ^= 0x0700;
|
|
scr_writew(i, (u16 *) vc->vc_pos);
|
|
if (DO_UPDATE(vc))
|
|
vc->vc_sw->con_putc(vc, i, vc->vc_y, vc->vc_x);
|
|
}
|
|
|
|
static void hide_softcursor(struct vc_data *vc)
|
|
{
|
|
if (softcursor_original != -1) {
|
|
scr_writew(softcursor_original, (u16 *)vc->vc_pos);
|
|
if (DO_UPDATE(vc))
|
|
vc->vc_sw->con_putc(vc, softcursor_original,
|
|
vc->vc_y, vc->vc_x);
|
|
softcursor_original = -1;
|
|
}
|
|
}
|
|
|
|
static void hide_cursor(struct vc_data *vc)
|
|
{
|
|
if (vc == sel_cons)
|
|
clear_selection();
|
|
vc->vc_sw->con_cursor(vc, CM_ERASE);
|
|
hide_softcursor(vc);
|
|
}
|
|
|
|
static void set_cursor(struct vc_data *vc)
|
|
{
|
|
if (!IS_FG(vc) || console_blanked ||
|
|
vc->vc_mode == KD_GRAPHICS)
|
|
return;
|
|
if (vc->vc_deccm) {
|
|
if (vc == sel_cons)
|
|
clear_selection();
|
|
add_softcursor(vc);
|
|
if ((vc->vc_cursor_type & 0x0f) != 1)
|
|
vc->vc_sw->con_cursor(vc, CM_DRAW);
|
|
} else
|
|
hide_cursor(vc);
|
|
}
|
|
|
|
static void set_origin(struct vc_data *vc)
|
|
{
|
|
WARN_CONSOLE_UNLOCKED();
|
|
|
|
if (!CON_IS_VISIBLE(vc) ||
|
|
!vc->vc_sw->con_set_origin ||
|
|
!vc->vc_sw->con_set_origin(vc))
|
|
vc->vc_origin = (unsigned long)vc->vc_screenbuf;
|
|
vc->vc_visible_origin = vc->vc_origin;
|
|
vc->vc_scr_end = vc->vc_origin + vc->vc_screenbuf_size;
|
|
vc->vc_pos = vc->vc_origin + vc->vc_size_row * vc->vc_y + 2 * vc->vc_x;
|
|
}
|
|
|
|
static inline void save_screen(struct vc_data *vc)
|
|
{
|
|
WARN_CONSOLE_UNLOCKED();
|
|
|
|
if (vc->vc_sw->con_save_screen)
|
|
vc->vc_sw->con_save_screen(vc);
|
|
}
|
|
|
|
/*
|
|
* Redrawing of screen
|
|
*/
|
|
|
|
static void clear_buffer_attributes(struct vc_data *vc)
|
|
{
|
|
unsigned short *p = (unsigned short *)vc->vc_origin;
|
|
int count = vc->vc_screenbuf_size / 2;
|
|
int mask = vc->vc_hi_font_mask | 0xff;
|
|
|
|
for (; count > 0; count--, p++) {
|
|
scr_writew((scr_readw(p)&mask) | (vc->vc_video_erase_char & ~mask), p);
|
|
}
|
|
}
|
|
|
|
void redraw_screen(struct vc_data *vc, int is_switch)
|
|
{
|
|
int redraw = 0;
|
|
|
|
WARN_CONSOLE_UNLOCKED();
|
|
|
|
if (!vc) {
|
|
/* strange ... */
|
|
/* printk("redraw_screen: tty %d not allocated ??\n", new_console+1); */
|
|
return;
|
|
}
|
|
|
|
if (is_switch) {
|
|
struct vc_data *old_vc = vc_cons[fg_console].d;
|
|
if (old_vc == vc)
|
|
return;
|
|
if (!CON_IS_VISIBLE(vc))
|
|
redraw = 1;
|
|
*vc->vc_display_fg = vc;
|
|
fg_console = vc->vc_num;
|
|
hide_cursor(old_vc);
|
|
if (!CON_IS_VISIBLE(old_vc)) {
|
|
save_screen(old_vc);
|
|
set_origin(old_vc);
|
|
}
|
|
} else {
|
|
hide_cursor(vc);
|
|
redraw = 1;
|
|
}
|
|
|
|
if (redraw) {
|
|
int update;
|
|
int old_was_color = vc->vc_can_do_color;
|
|
|
|
set_origin(vc);
|
|
update = vc->vc_sw->con_switch(vc);
|
|
set_palette(vc);
|
|
/*
|
|
* If console changed from mono<->color, the best we can do
|
|
* is to clear the buffer attributes. As it currently stands,
|
|
* rebuilding new attributes from the old buffer is not doable
|
|
* without overly complex code.
|
|
*/
|
|
if (old_was_color != vc->vc_can_do_color) {
|
|
update_attr(vc);
|
|
clear_buffer_attributes(vc);
|
|
}
|
|
if (update && vc->vc_mode != KD_GRAPHICS)
|
|
do_update_region(vc, vc->vc_origin, vc->vc_screenbuf_size / 2);
|
|
}
|
|
set_cursor(vc);
|
|
if (is_switch) {
|
|
set_leds();
|
|
compute_shiftstate();
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Allocation, freeing and resizing of VTs.
|
|
*/
|
|
|
|
int vc_cons_allocated(unsigned int i)
|
|
{
|
|
return (i < MAX_NR_CONSOLES && vc_cons[i].d);
|
|
}
|
|
|
|
static void visual_init(struct vc_data *vc, int num, int init)
|
|
{
|
|
/* ++Geert: vc->vc_sw->con_init determines console size */
|
|
if (vc->vc_sw)
|
|
module_put(vc->vc_sw->owner);
|
|
vc->vc_sw = conswitchp;
|
|
#ifndef VT_SINGLE_DRIVER
|
|
if (con_driver_map[num])
|
|
vc->vc_sw = con_driver_map[num];
|
|
#endif
|
|
__module_get(vc->vc_sw->owner);
|
|
vc->vc_num = num;
|
|
vc->vc_display_fg = &master_display_fg;
|
|
vc->vc_uni_pagedir_loc = &vc->vc_uni_pagedir;
|
|
vc->vc_uni_pagedir = 0;
|
|
vc->vc_hi_font_mask = 0;
|
|
vc->vc_complement_mask = 0;
|
|
vc->vc_can_do_color = 0;
|
|
vc->vc_sw->con_init(vc, init);
|
|
if (!vc->vc_complement_mask)
|
|
vc->vc_complement_mask = vc->vc_can_do_color ? 0x7700 : 0x0800;
|
|
vc->vc_s_complement_mask = vc->vc_complement_mask;
|
|
vc->vc_size_row = vc->vc_cols << 1;
|
|
vc->vc_screenbuf_size = vc->vc_rows * vc->vc_size_row;
|
|
}
|
|
|
|
int vc_allocate(unsigned int currcons) /* return 0 on success */
|
|
{
|
|
WARN_CONSOLE_UNLOCKED();
|
|
|
|
if (currcons >= MAX_NR_CONSOLES)
|
|
return -ENXIO;
|
|
if (!vc_cons[currcons].d) {
|
|
struct vc_data *vc;
|
|
|
|
/* prevent users from taking too much memory */
|
|
if (currcons >= MAX_NR_USER_CONSOLES && !capable(CAP_SYS_RESOURCE))
|
|
return -EPERM;
|
|
|
|
/* due to the granularity of kmalloc, we waste some memory here */
|
|
/* the alloc is done in two steps, to optimize the common situation
|
|
of a 25x80 console (structsize=216, screenbuf_size=4000) */
|
|
/* although the numbers above are not valid since long ago, the
|
|
point is still up-to-date and the comment still has its value
|
|
even if only as a historical artifact. --mj, July 1998 */
|
|
vc = kmalloc(sizeof(struct vc_data), GFP_KERNEL);
|
|
if (!vc)
|
|
return -ENOMEM;
|
|
memset(vc, 0, sizeof(*vc));
|
|
vc_cons[currcons].d = vc;
|
|
INIT_WORK(&vc_cons[currcons].SAK_work, vc_SAK);
|
|
visual_init(vc, currcons, 1);
|
|
if (!*vc->vc_uni_pagedir_loc)
|
|
con_set_default_unimap(vc);
|
|
if (!vc->vc_kmalloced)
|
|
vc->vc_screenbuf = kmalloc(vc->vc_screenbuf_size, GFP_KERNEL);
|
|
if (!vc->vc_screenbuf) {
|
|
kfree(vc);
|
|
vc_cons[currcons].d = NULL;
|
|
return -ENOMEM;
|
|
}
|
|
vc->vc_kmalloced = 1;
|
|
vc_init(vc, vc->vc_rows, vc->vc_cols, 1);
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static inline int resize_screen(struct vc_data *vc, int width, int height)
|
|
{
|
|
/* Resizes the resolution of the display adapater */
|
|
int err = 0;
|
|
|
|
if (vc->vc_mode != KD_GRAPHICS && vc->vc_sw->con_resize)
|
|
err = vc->vc_sw->con_resize(vc, width, height);
|
|
return err;
|
|
}
|
|
|
|
/*
|
|
* Change # of rows and columns (0 means unchanged/the size of fg_console)
|
|
* [this is to be used together with some user program
|
|
* like resize that changes the hardware videomode]
|
|
*/
|
|
#define VC_RESIZE_MAXCOL (32767)
|
|
#define VC_RESIZE_MAXROW (32767)
|
|
int vc_resize(struct vc_data *vc, unsigned int cols, unsigned int lines)
|
|
{
|
|
unsigned long old_origin, new_origin, new_scr_end, rlth, rrem, err = 0;
|
|
unsigned int old_cols, old_rows, old_row_size, old_screen_size;
|
|
unsigned int new_cols, new_rows, new_row_size, new_screen_size;
|
|
unsigned int end;
|
|
unsigned short *newscreen;
|
|
|
|
WARN_CONSOLE_UNLOCKED();
|
|
|
|
if (!vc)
|
|
return -ENXIO;
|
|
|
|
if (cols > VC_RESIZE_MAXCOL || lines > VC_RESIZE_MAXROW)
|
|
return -EINVAL;
|
|
|
|
new_cols = (cols ? cols : vc->vc_cols);
|
|
new_rows = (lines ? lines : vc->vc_rows);
|
|
new_row_size = new_cols << 1;
|
|
new_screen_size = new_row_size * new_rows;
|
|
|
|
if (new_cols == vc->vc_cols && new_rows == vc->vc_rows)
|
|
return 0;
|
|
|
|
newscreen = kmalloc(new_screen_size, GFP_USER);
|
|
if (!newscreen)
|
|
return -ENOMEM;
|
|
|
|
old_rows = vc->vc_rows;
|
|
old_cols = vc->vc_cols;
|
|
old_row_size = vc->vc_size_row;
|
|
old_screen_size = vc->vc_screenbuf_size;
|
|
|
|
err = resize_screen(vc, new_cols, new_rows);
|
|
if (err) {
|
|
kfree(newscreen);
|
|
return err;
|
|
}
|
|
|
|
vc->vc_rows = new_rows;
|
|
vc->vc_cols = new_cols;
|
|
vc->vc_size_row = new_row_size;
|
|
vc->vc_screenbuf_size = new_screen_size;
|
|
|
|
rlth = min(old_row_size, new_row_size);
|
|
rrem = new_row_size - rlth;
|
|
old_origin = vc->vc_origin;
|
|
new_origin = (long) newscreen;
|
|
new_scr_end = new_origin + new_screen_size;
|
|
|
|
if (vc->vc_y > new_rows) {
|
|
if (old_rows - vc->vc_y < new_rows) {
|
|
/*
|
|
* Cursor near the bottom, copy contents from the
|
|
* bottom of buffer
|
|
*/
|
|
old_origin += (old_rows - new_rows) * old_row_size;
|
|
end = vc->vc_scr_end;
|
|
} else {
|
|
/*
|
|
* Cursor is in no man's land, copy 1/2 screenful
|
|
* from the top and bottom of cursor position
|
|
*/
|
|
old_origin += (vc->vc_y - new_rows/2) * old_row_size;
|
|
end = old_origin + (old_row_size * new_rows);
|
|
}
|
|
} else
|
|
/*
|
|
* Cursor near the top, copy contents from the top of buffer
|
|
*/
|
|
end = (old_rows > new_rows) ? old_origin +
|
|
(old_row_size * new_rows) :
|
|
vc->vc_scr_end;
|
|
|
|
update_attr(vc);
|
|
|
|
while (old_origin < end) {
|
|
scr_memcpyw((unsigned short *) new_origin,
|
|
(unsigned short *) old_origin, rlth);
|
|
if (rrem)
|
|
scr_memsetw((void *)(new_origin + rlth),
|
|
vc->vc_video_erase_char, rrem);
|
|
old_origin += old_row_size;
|
|
new_origin += new_row_size;
|
|
}
|
|
if (new_scr_end > new_origin)
|
|
scr_memsetw((void *)new_origin, vc->vc_video_erase_char,
|
|
new_scr_end - new_origin);
|
|
if (vc->vc_kmalloced)
|
|
kfree(vc->vc_screenbuf);
|
|
vc->vc_screenbuf = newscreen;
|
|
vc->vc_kmalloced = 1;
|
|
vc->vc_screenbuf_size = new_screen_size;
|
|
set_origin(vc);
|
|
|
|
/* do part of a reset_terminal() */
|
|
vc->vc_top = 0;
|
|
vc->vc_bottom = vc->vc_rows;
|
|
gotoxy(vc, vc->vc_x, vc->vc_y);
|
|
save_cur(vc);
|
|
|
|
if (vc->vc_tty) {
|
|
struct winsize ws, *cws = &vc->vc_tty->winsize;
|
|
|
|
memset(&ws, 0, sizeof(ws));
|
|
ws.ws_row = vc->vc_rows;
|
|
ws.ws_col = vc->vc_cols;
|
|
ws.ws_ypixel = vc->vc_scan_lines;
|
|
if ((ws.ws_row != cws->ws_row || ws.ws_col != cws->ws_col) &&
|
|
vc->vc_tty->pgrp)
|
|
kill_pgrp(vc->vc_tty->pgrp, SIGWINCH, 1);
|
|
*cws = ws;
|
|
}
|
|
|
|
if (CON_IS_VISIBLE(vc))
|
|
update_screen(vc);
|
|
return err;
|
|
}
|
|
|
|
int vc_lock_resize(struct vc_data *vc, unsigned int cols, unsigned int lines)
|
|
{
|
|
int rc;
|
|
|
|
acquire_console_sem();
|
|
rc = vc_resize(vc, cols, lines);
|
|
release_console_sem();
|
|
return rc;
|
|
}
|
|
|
|
void vc_deallocate(unsigned int currcons)
|
|
{
|
|
WARN_CONSOLE_UNLOCKED();
|
|
|
|
if (vc_cons_allocated(currcons)) {
|
|
struct vc_data *vc = vc_cons[currcons].d;
|
|
vc->vc_sw->con_deinit(vc);
|
|
put_pid(vc->vt_pid);
|
|
module_put(vc->vc_sw->owner);
|
|
if (vc->vc_kmalloced)
|
|
kfree(vc->vc_screenbuf);
|
|
if (currcons >= MIN_NR_CONSOLES)
|
|
kfree(vc);
|
|
vc_cons[currcons].d = NULL;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* VT102 emulator
|
|
*/
|
|
|
|
#define set_kbd(vc, x) set_vc_kbd_mode(kbd_table + (vc)->vc_num, (x))
|
|
#define clr_kbd(vc, x) clr_vc_kbd_mode(kbd_table + (vc)->vc_num, (x))
|
|
#define is_kbd(vc, x) vc_kbd_mode(kbd_table + (vc)->vc_num, (x))
|
|
|
|
#define decarm VC_REPEAT
|
|
#define decckm VC_CKMODE
|
|
#define kbdapplic VC_APPLIC
|
|
#define lnm VC_CRLF
|
|
|
|
/*
|
|
* this is what the terminal answers to a ESC-Z or csi0c query.
|
|
*/
|
|
#define VT100ID "\033[?1;2c"
|
|
#define VT102ID "\033[?6c"
|
|
|
|
unsigned char color_table[] = { 0, 4, 2, 6, 1, 5, 3, 7,
|
|
8,12,10,14, 9,13,11,15 };
|
|
|
|
/* the default colour table, for VGA+ colour systems */
|
|
int default_red[] = {0x00,0xaa,0x00,0xaa,0x00,0xaa,0x00,0xaa,
|
|
0x55,0xff,0x55,0xff,0x55,0xff,0x55,0xff};
|
|
int default_grn[] = {0x00,0x00,0xaa,0x55,0x00,0x00,0xaa,0xaa,
|
|
0x55,0x55,0xff,0xff,0x55,0x55,0xff,0xff};
|
|
int default_blu[] = {0x00,0x00,0x00,0x00,0xaa,0xaa,0xaa,0xaa,
|
|
0x55,0x55,0x55,0x55,0xff,0xff,0xff,0xff};
|
|
|
|
module_param_array(default_red, int, NULL, S_IRUGO | S_IWUSR);
|
|
module_param_array(default_grn, int, NULL, S_IRUGO | S_IWUSR);
|
|
module_param_array(default_blu, int, NULL, S_IRUGO | S_IWUSR);
|
|
|
|
/*
|
|
* gotoxy() must verify all boundaries, because the arguments
|
|
* might also be negative. If the given position is out of
|
|
* bounds, the cursor is placed at the nearest margin.
|
|
*/
|
|
static void gotoxy(struct vc_data *vc, int new_x, int new_y)
|
|
{
|
|
int min_y, max_y;
|
|
|
|
if (new_x < 0)
|
|
vc->vc_x = 0;
|
|
else {
|
|
if (new_x >= vc->vc_cols)
|
|
vc->vc_x = vc->vc_cols - 1;
|
|
else
|
|
vc->vc_x = new_x;
|
|
}
|
|
|
|
if (vc->vc_decom) {
|
|
min_y = vc->vc_top;
|
|
max_y = vc->vc_bottom;
|
|
} else {
|
|
min_y = 0;
|
|
max_y = vc->vc_rows;
|
|
}
|
|
if (new_y < min_y)
|
|
vc->vc_y = min_y;
|
|
else if (new_y >= max_y)
|
|
vc->vc_y = max_y - 1;
|
|
else
|
|
vc->vc_y = new_y;
|
|
vc->vc_pos = vc->vc_origin + vc->vc_y * vc->vc_size_row + (vc->vc_x<<1);
|
|
vc->vc_need_wrap = 0;
|
|
}
|
|
|
|
/* for absolute user moves, when decom is set */
|
|
static void gotoxay(struct vc_data *vc, int new_x, int new_y)
|
|
{
|
|
gotoxy(vc, new_x, vc->vc_decom ? (vc->vc_top + new_y) : new_y);
|
|
}
|
|
|
|
void scrollback(struct vc_data *vc, int lines)
|
|
{
|
|
if (!lines)
|
|
lines = vc->vc_rows / 2;
|
|
scrolldelta(-lines);
|
|
}
|
|
|
|
void scrollfront(struct vc_data *vc, int lines)
|
|
{
|
|
if (!lines)
|
|
lines = vc->vc_rows / 2;
|
|
scrolldelta(lines);
|
|
}
|
|
|
|
static void lf(struct vc_data *vc)
|
|
{
|
|
/* don't scroll if above bottom of scrolling region, or
|
|
* if below scrolling region
|
|
*/
|
|
if (vc->vc_y + 1 == vc->vc_bottom)
|
|
scrup(vc, vc->vc_top, vc->vc_bottom, 1);
|
|
else if (vc->vc_y < vc->vc_rows - 1) {
|
|
vc->vc_y++;
|
|
vc->vc_pos += vc->vc_size_row;
|
|
}
|
|
vc->vc_need_wrap = 0;
|
|
}
|
|
|
|
static void ri(struct vc_data *vc)
|
|
{
|
|
/* don't scroll if below top of scrolling region, or
|
|
* if above scrolling region
|
|
*/
|
|
if (vc->vc_y == vc->vc_top)
|
|
scrdown(vc, vc->vc_top, vc->vc_bottom, 1);
|
|
else if (vc->vc_y > 0) {
|
|
vc->vc_y--;
|
|
vc->vc_pos -= vc->vc_size_row;
|
|
}
|
|
vc->vc_need_wrap = 0;
|
|
}
|
|
|
|
static inline void cr(struct vc_data *vc)
|
|
{
|
|
vc->vc_pos -= vc->vc_x << 1;
|
|
vc->vc_need_wrap = vc->vc_x = 0;
|
|
}
|
|
|
|
static inline void bs(struct vc_data *vc)
|
|
{
|
|
if (vc->vc_x) {
|
|
vc->vc_pos -= 2;
|
|
vc->vc_x--;
|
|
vc->vc_need_wrap = 0;
|
|
}
|
|
}
|
|
|
|
static inline void del(struct vc_data *vc)
|
|
{
|
|
/* ignored */
|
|
}
|
|
|
|
static void csi_J(struct vc_data *vc, int vpar)
|
|
{
|
|
unsigned int count;
|
|
unsigned short * start;
|
|
|
|
switch (vpar) {
|
|
case 0: /* erase from cursor to end of display */
|
|
count = (vc->vc_scr_end - vc->vc_pos) >> 1;
|
|
start = (unsigned short *)vc->vc_pos;
|
|
if (DO_UPDATE(vc)) {
|
|
/* do in two stages */
|
|
vc->vc_sw->con_clear(vc, vc->vc_y, vc->vc_x, 1,
|
|
vc->vc_cols - vc->vc_x);
|
|
vc->vc_sw->con_clear(vc, vc->vc_y + 1, 0,
|
|
vc->vc_rows - vc->vc_y - 1,
|
|
vc->vc_cols);
|
|
}
|
|
break;
|
|
case 1: /* erase from start to cursor */
|
|
count = ((vc->vc_pos - vc->vc_origin) >> 1) + 1;
|
|
start = (unsigned short *)vc->vc_origin;
|
|
if (DO_UPDATE(vc)) {
|
|
/* do in two stages */
|
|
vc->vc_sw->con_clear(vc, 0, 0, vc->vc_y,
|
|
vc->vc_cols);
|
|
vc->vc_sw->con_clear(vc, vc->vc_y, 0, 1,
|
|
vc->vc_x + 1);
|
|
}
|
|
break;
|
|
case 2: /* erase whole display */
|
|
count = vc->vc_cols * vc->vc_rows;
|
|
start = (unsigned short *)vc->vc_origin;
|
|
if (DO_UPDATE(vc))
|
|
vc->vc_sw->con_clear(vc, 0, 0,
|
|
vc->vc_rows,
|
|
vc->vc_cols);
|
|
break;
|
|
default:
|
|
return;
|
|
}
|
|
scr_memsetw(start, vc->vc_video_erase_char, 2 * count);
|
|
vc->vc_need_wrap = 0;
|
|
}
|
|
|
|
static void csi_K(struct vc_data *vc, int vpar)
|
|
{
|
|
unsigned int count;
|
|
unsigned short * start;
|
|
|
|
switch (vpar) {
|
|
case 0: /* erase from cursor to end of line */
|
|
count = vc->vc_cols - vc->vc_x;
|
|
start = (unsigned short *)vc->vc_pos;
|
|
if (DO_UPDATE(vc))
|
|
vc->vc_sw->con_clear(vc, vc->vc_y, vc->vc_x, 1,
|
|
vc->vc_cols - vc->vc_x);
|
|
break;
|
|
case 1: /* erase from start of line to cursor */
|
|
start = (unsigned short *)(vc->vc_pos - (vc->vc_x << 1));
|
|
count = vc->vc_x + 1;
|
|
if (DO_UPDATE(vc))
|
|
vc->vc_sw->con_clear(vc, vc->vc_y, 0, 1,
|
|
vc->vc_x + 1);
|
|
break;
|
|
case 2: /* erase whole line */
|
|
start = (unsigned short *)(vc->vc_pos - (vc->vc_x << 1));
|
|
count = vc->vc_cols;
|
|
if (DO_UPDATE(vc))
|
|
vc->vc_sw->con_clear(vc, vc->vc_y, 0, 1,
|
|
vc->vc_cols);
|
|
break;
|
|
default:
|
|
return;
|
|
}
|
|
scr_memsetw(start, vc->vc_video_erase_char, 2 * count);
|
|
vc->vc_need_wrap = 0;
|
|
}
|
|
|
|
static void csi_X(struct vc_data *vc, int vpar) /* erase the following vpar positions */
|
|
{ /* not vt100? */
|
|
int count;
|
|
|
|
if (!vpar)
|
|
vpar++;
|
|
count = (vpar > vc->vc_cols - vc->vc_x) ? (vc->vc_cols - vc->vc_x) : vpar;
|
|
|
|
scr_memsetw((unsigned short *)vc->vc_pos, vc->vc_video_erase_char, 2 * count);
|
|
if (DO_UPDATE(vc))
|
|
vc->vc_sw->con_clear(vc, vc->vc_y, vc->vc_x, 1, count);
|
|
vc->vc_need_wrap = 0;
|
|
}
|
|
|
|
static void default_attr(struct vc_data *vc)
|
|
{
|
|
vc->vc_intensity = 1;
|
|
vc->vc_italic = 0;
|
|
vc->vc_underline = 0;
|
|
vc->vc_reverse = 0;
|
|
vc->vc_blink = 0;
|
|
vc->vc_color = vc->vc_def_color;
|
|
}
|
|
|
|
/* console_sem is held */
|
|
static void csi_m(struct vc_data *vc)
|
|
{
|
|
int i;
|
|
|
|
for (i = 0; i <= vc->vc_npar; i++)
|
|
switch (vc->vc_par[i]) {
|
|
case 0: /* all attributes off */
|
|
default_attr(vc);
|
|
break;
|
|
case 1:
|
|
vc->vc_intensity = 2;
|
|
break;
|
|
case 2:
|
|
vc->vc_intensity = 0;
|
|
break;
|
|
case 3:
|
|
vc->vc_italic = 1;
|
|
break;
|
|
case 4:
|
|
vc->vc_underline = 1;
|
|
break;
|
|
case 5:
|
|
vc->vc_blink = 1;
|
|
break;
|
|
case 7:
|
|
vc->vc_reverse = 1;
|
|
break;
|
|
case 10: /* ANSI X3.64-1979 (SCO-ish?)
|
|
* Select primary font, don't display
|
|
* control chars if defined, don't set
|
|
* bit 8 on output.
|
|
*/
|
|
vc->vc_translate = set_translate(vc->vc_charset == 0
|
|
? vc->vc_G0_charset
|
|
: vc->vc_G1_charset, vc);
|
|
vc->vc_disp_ctrl = 0;
|
|
vc->vc_toggle_meta = 0;
|
|
break;
|
|
case 11: /* ANSI X3.64-1979 (SCO-ish?)
|
|
* Select first alternate font, lets
|
|
* chars < 32 be displayed as ROM chars.
|
|
*/
|
|
vc->vc_translate = set_translate(IBMPC_MAP, vc);
|
|
vc->vc_disp_ctrl = 1;
|
|
vc->vc_toggle_meta = 0;
|
|
break;
|
|
case 12: /* ANSI X3.64-1979 (SCO-ish?)
|
|
* Select second alternate font, toggle
|
|
* high bit before displaying as ROM char.
|
|
*/
|
|
vc->vc_translate = set_translate(IBMPC_MAP, vc);
|
|
vc->vc_disp_ctrl = 1;
|
|
vc->vc_toggle_meta = 1;
|
|
break;
|
|
case 21:
|
|
case 22:
|
|
vc->vc_intensity = 1;
|
|
break;
|
|
case 23:
|
|
vc->vc_italic = 0;
|
|
break;
|
|
case 24:
|
|
vc->vc_underline = 0;
|
|
break;
|
|
case 25:
|
|
vc->vc_blink = 0;
|
|
break;
|
|
case 27:
|
|
vc->vc_reverse = 0;
|
|
break;
|
|
case 38: /* ANSI X3.64-1979 (SCO-ish?)
|
|
* Enables underscore, white foreground
|
|
* with white underscore (Linux - use
|
|
* default foreground).
|
|
*/
|
|
vc->vc_color = (vc->vc_def_color & 0x0f) | (vc->vc_color & 0xf0);
|
|
vc->vc_underline = 1;
|
|
break;
|
|
case 39: /* ANSI X3.64-1979 (SCO-ish?)
|
|
* Disable underline option.
|
|
* Reset colour to default? It did this
|
|
* before...
|
|
*/
|
|
vc->vc_color = (vc->vc_def_color & 0x0f) | (vc->vc_color & 0xf0);
|
|
vc->vc_underline = 0;
|
|
break;
|
|
case 49:
|
|
vc->vc_color = (vc->vc_def_color & 0xf0) | (vc->vc_color & 0x0f);
|
|
break;
|
|
default:
|
|
if (vc->vc_par[i] >= 30 && vc->vc_par[i] <= 37)
|
|
vc->vc_color = color_table[vc->vc_par[i] - 30]
|
|
| (vc->vc_color & 0xf0);
|
|
else if (vc->vc_par[i] >= 40 && vc->vc_par[i] <= 47)
|
|
vc->vc_color = (color_table[vc->vc_par[i] - 40] << 4)
|
|
| (vc->vc_color & 0x0f);
|
|
break;
|
|
}
|
|
update_attr(vc);
|
|
}
|
|
|
|
static void respond_string(const char *p, struct tty_struct *tty)
|
|
{
|
|
while (*p) {
|
|
tty_insert_flip_char(tty, *p, 0);
|
|
p++;
|
|
}
|
|
con_schedule_flip(tty);
|
|
}
|
|
|
|
static void cursor_report(struct vc_data *vc, struct tty_struct *tty)
|
|
{
|
|
char buf[40];
|
|
|
|
sprintf(buf, "\033[%d;%dR", vc->vc_y + (vc->vc_decom ? vc->vc_top + 1 : 1), vc->vc_x + 1);
|
|
respond_string(buf, tty);
|
|
}
|
|
|
|
static inline void status_report(struct tty_struct *tty)
|
|
{
|
|
respond_string("\033[0n", tty); /* Terminal ok */
|
|
}
|
|
|
|
static inline void respond_ID(struct tty_struct * tty)
|
|
{
|
|
respond_string(VT102ID, tty);
|
|
}
|
|
|
|
void mouse_report(struct tty_struct *tty, int butt, int mrx, int mry)
|
|
{
|
|
char buf[8];
|
|
|
|
sprintf(buf, "\033[M%c%c%c", (char)(' ' + butt), (char)('!' + mrx),
|
|
(char)('!' + mry));
|
|
respond_string(buf, tty);
|
|
}
|
|
|
|
/* invoked via ioctl(TIOCLINUX) and through set_selection */
|
|
int mouse_reporting(void)
|
|
{
|
|
return vc_cons[fg_console].d->vc_report_mouse;
|
|
}
|
|
|
|
/* console_sem is held */
|
|
static void set_mode(struct vc_data *vc, int on_off)
|
|
{
|
|
int i;
|
|
|
|
for (i = 0; i <= vc->vc_npar; i++)
|
|
if (vc->vc_ques) {
|
|
switch(vc->vc_par[i]) { /* DEC private modes set/reset */
|
|
case 1: /* Cursor keys send ^[Ox/^[[x */
|
|
if (on_off)
|
|
set_kbd(vc, decckm);
|
|
else
|
|
clr_kbd(vc, decckm);
|
|
break;
|
|
case 3: /* 80/132 mode switch unimplemented */
|
|
vc->vc_deccolm = on_off;
|
|
#if 0
|
|
vc_resize(deccolm ? 132 : 80, vc->vc_rows);
|
|
/* this alone does not suffice; some user mode
|
|
utility has to change the hardware regs */
|
|
#endif
|
|
break;
|
|
case 5: /* Inverted screen on/off */
|
|
if (vc->vc_decscnm != on_off) {
|
|
vc->vc_decscnm = on_off;
|
|
invert_screen(vc, 0, vc->vc_screenbuf_size, 0);
|
|
update_attr(vc);
|
|
}
|
|
break;
|
|
case 6: /* Origin relative/absolute */
|
|
vc->vc_decom = on_off;
|
|
gotoxay(vc, 0, 0);
|
|
break;
|
|
case 7: /* Autowrap on/off */
|
|
vc->vc_decawm = on_off;
|
|
break;
|
|
case 8: /* Autorepeat on/off */
|
|
if (on_off)
|
|
set_kbd(vc, decarm);
|
|
else
|
|
clr_kbd(vc, decarm);
|
|
break;
|
|
case 9:
|
|
vc->vc_report_mouse = on_off ? 1 : 0;
|
|
break;
|
|
case 25: /* Cursor on/off */
|
|
vc->vc_deccm = on_off;
|
|
break;
|
|
case 1000:
|
|
vc->vc_report_mouse = on_off ? 2 : 0;
|
|
break;
|
|
}
|
|
} else {
|
|
switch(vc->vc_par[i]) { /* ANSI modes set/reset */
|
|
case 3: /* Monitor (display ctrls) */
|
|
vc->vc_disp_ctrl = on_off;
|
|
break;
|
|
case 4: /* Insert Mode on/off */
|
|
vc->vc_decim = on_off;
|
|
break;
|
|
case 20: /* Lf, Enter == CrLf/Lf */
|
|
if (on_off)
|
|
set_kbd(vc, lnm);
|
|
else
|
|
clr_kbd(vc, lnm);
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
/* console_sem is held */
|
|
static void setterm_command(struct vc_data *vc)
|
|
{
|
|
switch(vc->vc_par[0]) {
|
|
case 1: /* set color for underline mode */
|
|
if (vc->vc_can_do_color &&
|
|
vc->vc_par[1] < 16) {
|
|
vc->vc_ulcolor = color_table[vc->vc_par[1]];
|
|
if (vc->vc_underline)
|
|
update_attr(vc);
|
|
}
|
|
break;
|
|
case 2: /* set color for half intensity mode */
|
|
if (vc->vc_can_do_color &&
|
|
vc->vc_par[1] < 16) {
|
|
vc->vc_halfcolor = color_table[vc->vc_par[1]];
|
|
if (vc->vc_intensity == 0)
|
|
update_attr(vc);
|
|
}
|
|
break;
|
|
case 8: /* store colors as defaults */
|
|
vc->vc_def_color = vc->vc_attr;
|
|
if (vc->vc_hi_font_mask == 0x100)
|
|
vc->vc_def_color >>= 1;
|
|
default_attr(vc);
|
|
update_attr(vc);
|
|
break;
|
|
case 9: /* set blanking interval */
|
|
blankinterval = ((vc->vc_par[1] < 60) ? vc->vc_par[1] : 60) * 60 * HZ;
|
|
poke_blanked_console();
|
|
break;
|
|
case 10: /* set bell frequency in Hz */
|
|
if (vc->vc_npar >= 1)
|
|
vc->vc_bell_pitch = vc->vc_par[1];
|
|
else
|
|
vc->vc_bell_pitch = DEFAULT_BELL_PITCH;
|
|
break;
|
|
case 11: /* set bell duration in msec */
|
|
if (vc->vc_npar >= 1)
|
|
vc->vc_bell_duration = (vc->vc_par[1] < 2000) ?
|
|
vc->vc_par[1] * HZ / 1000 : 0;
|
|
else
|
|
vc->vc_bell_duration = DEFAULT_BELL_DURATION;
|
|
break;
|
|
case 12: /* bring specified console to the front */
|
|
if (vc->vc_par[1] >= 1 && vc_cons_allocated(vc->vc_par[1] - 1))
|
|
set_console(vc->vc_par[1] - 1);
|
|
break;
|
|
case 13: /* unblank the screen */
|
|
poke_blanked_console();
|
|
break;
|
|
case 14: /* set vesa powerdown interval */
|
|
vesa_off_interval = ((vc->vc_par[1] < 60) ? vc->vc_par[1] : 60) * 60 * HZ;
|
|
break;
|
|
case 15: /* activate the previous console */
|
|
set_console(last_console);
|
|
break;
|
|
}
|
|
}
|
|
|
|
/* console_sem is held */
|
|
static void csi_at(struct vc_data *vc, unsigned int nr)
|
|
{
|
|
if (nr > vc->vc_cols - vc->vc_x)
|
|
nr = vc->vc_cols - vc->vc_x;
|
|
else if (!nr)
|
|
nr = 1;
|
|
insert_char(vc, nr);
|
|
}
|
|
|
|
/* console_sem is held */
|
|
static void csi_L(struct vc_data *vc, unsigned int nr)
|
|
{
|
|
if (nr > vc->vc_rows - vc->vc_y)
|
|
nr = vc->vc_rows - vc->vc_y;
|
|
else if (!nr)
|
|
nr = 1;
|
|
scrdown(vc, vc->vc_y, vc->vc_bottom, nr);
|
|
vc->vc_need_wrap = 0;
|
|
}
|
|
|
|
/* console_sem is held */
|
|
static void csi_P(struct vc_data *vc, unsigned int nr)
|
|
{
|
|
if (nr > vc->vc_cols - vc->vc_x)
|
|
nr = vc->vc_cols - vc->vc_x;
|
|
else if (!nr)
|
|
nr = 1;
|
|
delete_char(vc, nr);
|
|
}
|
|
|
|
/* console_sem is held */
|
|
static void csi_M(struct vc_data *vc, unsigned int nr)
|
|
{
|
|
if (nr > vc->vc_rows - vc->vc_y)
|
|
nr = vc->vc_rows - vc->vc_y;
|
|
else if (!nr)
|
|
nr=1;
|
|
scrup(vc, vc->vc_y, vc->vc_bottom, nr);
|
|
vc->vc_need_wrap = 0;
|
|
}
|
|
|
|
/* console_sem is held (except via vc_init->reset_terminal */
|
|
static void save_cur(struct vc_data *vc)
|
|
{
|
|
vc->vc_saved_x = vc->vc_x;
|
|
vc->vc_saved_y = vc->vc_y;
|
|
vc->vc_s_intensity = vc->vc_intensity;
|
|
vc->vc_s_italic = vc->vc_italic;
|
|
vc->vc_s_underline = vc->vc_underline;
|
|
vc->vc_s_blink = vc->vc_blink;
|
|
vc->vc_s_reverse = vc->vc_reverse;
|
|
vc->vc_s_charset = vc->vc_charset;
|
|
vc->vc_s_color = vc->vc_color;
|
|
vc->vc_saved_G0 = vc->vc_G0_charset;
|
|
vc->vc_saved_G1 = vc->vc_G1_charset;
|
|
}
|
|
|
|
/* console_sem is held */
|
|
static void restore_cur(struct vc_data *vc)
|
|
{
|
|
gotoxy(vc, vc->vc_saved_x, vc->vc_saved_y);
|
|
vc->vc_intensity = vc->vc_s_intensity;
|
|
vc->vc_italic = vc->vc_s_italic;
|
|
vc->vc_underline = vc->vc_s_underline;
|
|
vc->vc_blink = vc->vc_s_blink;
|
|
vc->vc_reverse = vc->vc_s_reverse;
|
|
vc->vc_charset = vc->vc_s_charset;
|
|
vc->vc_color = vc->vc_s_color;
|
|
vc->vc_G0_charset = vc->vc_saved_G0;
|
|
vc->vc_G1_charset = vc->vc_saved_G1;
|
|
vc->vc_translate = set_translate(vc->vc_charset ? vc->vc_G1_charset : vc->vc_G0_charset, vc);
|
|
update_attr(vc);
|
|
vc->vc_need_wrap = 0;
|
|
}
|
|
|
|
enum { ESnormal, ESesc, ESsquare, ESgetpars, ESgotpars, ESfunckey,
|
|
EShash, ESsetG0, ESsetG1, ESpercent, ESignore, ESnonstd,
|
|
ESpalette };
|
|
|
|
/* console_sem is held (except via vc_init()) */
|
|
static void reset_terminal(struct vc_data *vc, int do_clear)
|
|
{
|
|
vc->vc_top = 0;
|
|
vc->vc_bottom = vc->vc_rows;
|
|
vc->vc_state = ESnormal;
|
|
vc->vc_ques = 0;
|
|
vc->vc_translate = set_translate(LAT1_MAP, vc);
|
|
vc->vc_G0_charset = LAT1_MAP;
|
|
vc->vc_G1_charset = GRAF_MAP;
|
|
vc->vc_charset = 0;
|
|
vc->vc_need_wrap = 0;
|
|
vc->vc_report_mouse = 0;
|
|
vc->vc_utf = default_utf8;
|
|
vc->vc_utf_count = 0;
|
|
|
|
vc->vc_disp_ctrl = 0;
|
|
vc->vc_toggle_meta = 0;
|
|
|
|
vc->vc_decscnm = 0;
|
|
vc->vc_decom = 0;
|
|
vc->vc_decawm = 1;
|
|
vc->vc_deccm = 1;
|
|
vc->vc_decim = 0;
|
|
|
|
set_kbd(vc, decarm);
|
|
clr_kbd(vc, decckm);
|
|
clr_kbd(vc, kbdapplic);
|
|
clr_kbd(vc, lnm);
|
|
kbd_table[vc->vc_num].lockstate = 0;
|
|
kbd_table[vc->vc_num].slockstate = 0;
|
|
kbd_table[vc->vc_num].ledmode = LED_SHOW_FLAGS;
|
|
kbd_table[vc->vc_num].ledflagstate = kbd_table[vc->vc_num].default_ledflagstate;
|
|
/* do not do set_leds here because this causes an endless tasklet loop
|
|
when the keyboard hasn't been initialized yet */
|
|
|
|
vc->vc_cursor_type = CUR_DEFAULT;
|
|
vc->vc_complement_mask = vc->vc_s_complement_mask;
|
|
|
|
default_attr(vc);
|
|
update_attr(vc);
|
|
|
|
vc->vc_tab_stop[0] = 0x01010100;
|
|
vc->vc_tab_stop[1] =
|
|
vc->vc_tab_stop[2] =
|
|
vc->vc_tab_stop[3] =
|
|
vc->vc_tab_stop[4] = 0x01010101;
|
|
|
|
vc->vc_bell_pitch = DEFAULT_BELL_PITCH;
|
|
vc->vc_bell_duration = DEFAULT_BELL_DURATION;
|
|
|
|
gotoxy(vc, 0, 0);
|
|
save_cur(vc);
|
|
if (do_clear)
|
|
csi_J(vc, 2);
|
|
}
|
|
|
|
/* console_sem is held */
|
|
static void do_con_trol(struct tty_struct *tty, struct vc_data *vc, int c)
|
|
{
|
|
/*
|
|
* Control characters can be used in the _middle_
|
|
* of an escape sequence.
|
|
*/
|
|
switch (c) {
|
|
case 0:
|
|
return;
|
|
case 7:
|
|
if (vc->vc_bell_duration)
|
|
kd_mksound(vc->vc_bell_pitch, vc->vc_bell_duration);
|
|
return;
|
|
case 8:
|
|
bs(vc);
|
|
return;
|
|
case 9:
|
|
vc->vc_pos -= (vc->vc_x << 1);
|
|
while (vc->vc_x < vc->vc_cols - 1) {
|
|
vc->vc_x++;
|
|
if (vc->vc_tab_stop[vc->vc_x >> 5] & (1 << (vc->vc_x & 31)))
|
|
break;
|
|
}
|
|
vc->vc_pos += (vc->vc_x << 1);
|
|
return;
|
|
case 10: case 11: case 12:
|
|
lf(vc);
|
|
if (!is_kbd(vc, lnm))
|
|
return;
|
|
case 13:
|
|
cr(vc);
|
|
return;
|
|
case 14:
|
|
vc->vc_charset = 1;
|
|
vc->vc_translate = set_translate(vc->vc_G1_charset, vc);
|
|
vc->vc_disp_ctrl = 1;
|
|
return;
|
|
case 15:
|
|
vc->vc_charset = 0;
|
|
vc->vc_translate = set_translate(vc->vc_G0_charset, vc);
|
|
vc->vc_disp_ctrl = 0;
|
|
return;
|
|
case 24: case 26:
|
|
vc->vc_state = ESnormal;
|
|
return;
|
|
case 27:
|
|
vc->vc_state = ESesc;
|
|
return;
|
|
case 127:
|
|
del(vc);
|
|
return;
|
|
case 128+27:
|
|
vc->vc_state = ESsquare;
|
|
return;
|
|
}
|
|
switch(vc->vc_state) {
|
|
case ESesc:
|
|
vc->vc_state = ESnormal;
|
|
switch (c) {
|
|
case '[':
|
|
vc->vc_state = ESsquare;
|
|
return;
|
|
case ']':
|
|
vc->vc_state = ESnonstd;
|
|
return;
|
|
case '%':
|
|
vc->vc_state = ESpercent;
|
|
return;
|
|
case 'E':
|
|
cr(vc);
|
|
lf(vc);
|
|
return;
|
|
case 'M':
|
|
ri(vc);
|
|
return;
|
|
case 'D':
|
|
lf(vc);
|
|
return;
|
|
case 'H':
|
|
vc->vc_tab_stop[vc->vc_x >> 5] |= (1 << (vc->vc_x & 31));
|
|
return;
|
|
case 'Z':
|
|
respond_ID(tty);
|
|
return;
|
|
case '7':
|
|
save_cur(vc);
|
|
return;
|
|
case '8':
|
|
restore_cur(vc);
|
|
return;
|
|
case '(':
|
|
vc->vc_state = ESsetG0;
|
|
return;
|
|
case ')':
|
|
vc->vc_state = ESsetG1;
|
|
return;
|
|
case '#':
|
|
vc->vc_state = EShash;
|
|
return;
|
|
case 'c':
|
|
reset_terminal(vc, 1);
|
|
return;
|
|
case '>': /* Numeric keypad */
|
|
clr_kbd(vc, kbdapplic);
|
|
return;
|
|
case '=': /* Appl. keypad */
|
|
set_kbd(vc, kbdapplic);
|
|
return;
|
|
}
|
|
return;
|
|
case ESnonstd:
|
|
if (c=='P') { /* palette escape sequence */
|
|
for (vc->vc_npar = 0; vc->vc_npar < NPAR; vc->vc_npar++)
|
|
vc->vc_par[vc->vc_npar] = 0;
|
|
vc->vc_npar = 0;
|
|
vc->vc_state = ESpalette;
|
|
return;
|
|
} else if (c=='R') { /* reset palette */
|
|
reset_palette(vc);
|
|
vc->vc_state = ESnormal;
|
|
} else
|
|
vc->vc_state = ESnormal;
|
|
return;
|
|
case ESpalette:
|
|
if ( (c>='0'&&c<='9') || (c>='A'&&c<='F') || (c>='a'&&c<='f') ) {
|
|
vc->vc_par[vc->vc_npar++] = (c > '9' ? (c & 0xDF) - 'A' + 10 : c - '0');
|
|
if (vc->vc_npar == 7) {
|
|
int i = vc->vc_par[0] * 3, j = 1;
|
|
vc->vc_palette[i] = 16 * vc->vc_par[j++];
|
|
vc->vc_palette[i++] += vc->vc_par[j++];
|
|
vc->vc_palette[i] = 16 * vc->vc_par[j++];
|
|
vc->vc_palette[i++] += vc->vc_par[j++];
|
|
vc->vc_palette[i] = 16 * vc->vc_par[j++];
|
|
vc->vc_palette[i] += vc->vc_par[j];
|
|
set_palette(vc);
|
|
vc->vc_state = ESnormal;
|
|
}
|
|
} else
|
|
vc->vc_state = ESnormal;
|
|
return;
|
|
case ESsquare:
|
|
for (vc->vc_npar = 0; vc->vc_npar < NPAR; vc->vc_npar++)
|
|
vc->vc_par[vc->vc_npar] = 0;
|
|
vc->vc_npar = 0;
|
|
vc->vc_state = ESgetpars;
|
|
if (c == '[') { /* Function key */
|
|
vc->vc_state=ESfunckey;
|
|
return;
|
|
}
|
|
vc->vc_ques = (c == '?');
|
|
if (vc->vc_ques)
|
|
return;
|
|
case ESgetpars:
|
|
if (c == ';' && vc->vc_npar < NPAR - 1) {
|
|
vc->vc_npar++;
|
|
return;
|
|
} else if (c>='0' && c<='9') {
|
|
vc->vc_par[vc->vc_npar] *= 10;
|
|
vc->vc_par[vc->vc_npar] += c - '0';
|
|
return;
|
|
} else
|
|
vc->vc_state = ESgotpars;
|
|
case ESgotpars:
|
|
vc->vc_state = ESnormal;
|
|
switch(c) {
|
|
case 'h':
|
|
set_mode(vc, 1);
|
|
return;
|
|
case 'l':
|
|
set_mode(vc, 0);
|
|
return;
|
|
case 'c':
|
|
if (vc->vc_ques) {
|
|
if (vc->vc_par[0])
|
|
vc->vc_cursor_type = vc->vc_par[0] | (vc->vc_par[1] << 8) | (vc->vc_par[2] << 16);
|
|
else
|
|
vc->vc_cursor_type = CUR_DEFAULT;
|
|
return;
|
|
}
|
|
break;
|
|
case 'm':
|
|
if (vc->vc_ques) {
|
|
clear_selection();
|
|
if (vc->vc_par[0])
|
|
vc->vc_complement_mask = vc->vc_par[0] << 8 | vc->vc_par[1];
|
|
else
|
|
vc->vc_complement_mask = vc->vc_s_complement_mask;
|
|
return;
|
|
}
|
|
break;
|
|
case 'n':
|
|
if (!vc->vc_ques) {
|
|
if (vc->vc_par[0] == 5)
|
|
status_report(tty);
|
|
else if (vc->vc_par[0] == 6)
|
|
cursor_report(vc, tty);
|
|
}
|
|
return;
|
|
}
|
|
if (vc->vc_ques) {
|
|
vc->vc_ques = 0;
|
|
return;
|
|
}
|
|
switch(c) {
|
|
case 'G': case '`':
|
|
if (vc->vc_par[0])
|
|
vc->vc_par[0]--;
|
|
gotoxy(vc, vc->vc_par[0], vc->vc_y);
|
|
return;
|
|
case 'A':
|
|
if (!vc->vc_par[0])
|
|
vc->vc_par[0]++;
|
|
gotoxy(vc, vc->vc_x, vc->vc_y - vc->vc_par[0]);
|
|
return;
|
|
case 'B': case 'e':
|
|
if (!vc->vc_par[0])
|
|
vc->vc_par[0]++;
|
|
gotoxy(vc, vc->vc_x, vc->vc_y + vc->vc_par[0]);
|
|
return;
|
|
case 'C': case 'a':
|
|
if (!vc->vc_par[0])
|
|
vc->vc_par[0]++;
|
|
gotoxy(vc, vc->vc_x + vc->vc_par[0], vc->vc_y);
|
|
return;
|
|
case 'D':
|
|
if (!vc->vc_par[0])
|
|
vc->vc_par[0]++;
|
|
gotoxy(vc, vc->vc_x - vc->vc_par[0], vc->vc_y);
|
|
return;
|
|
case 'E':
|
|
if (!vc->vc_par[0])
|
|
vc->vc_par[0]++;
|
|
gotoxy(vc, 0, vc->vc_y + vc->vc_par[0]);
|
|
return;
|
|
case 'F':
|
|
if (!vc->vc_par[0])
|
|
vc->vc_par[0]++;
|
|
gotoxy(vc, 0, vc->vc_y - vc->vc_par[0]);
|
|
return;
|
|
case 'd':
|
|
if (vc->vc_par[0])
|
|
vc->vc_par[0]--;
|
|
gotoxay(vc, vc->vc_x ,vc->vc_par[0]);
|
|
return;
|
|
case 'H': case 'f':
|
|
if (vc->vc_par[0])
|
|
vc->vc_par[0]--;
|
|
if (vc->vc_par[1])
|
|
vc->vc_par[1]--;
|
|
gotoxay(vc, vc->vc_par[1], vc->vc_par[0]);
|
|
return;
|
|
case 'J':
|
|
csi_J(vc, vc->vc_par[0]);
|
|
return;
|
|
case 'K':
|
|
csi_K(vc, vc->vc_par[0]);
|
|
return;
|
|
case 'L':
|
|
csi_L(vc, vc->vc_par[0]);
|
|
return;
|
|
case 'M':
|
|
csi_M(vc, vc->vc_par[0]);
|
|
return;
|
|
case 'P':
|
|
csi_P(vc, vc->vc_par[0]);
|
|
return;
|
|
case 'c':
|
|
if (!vc->vc_par[0])
|
|
respond_ID(tty);
|
|
return;
|
|
case 'g':
|
|
if (!vc->vc_par[0])
|
|
vc->vc_tab_stop[vc->vc_x >> 5] &= ~(1 << (vc->vc_x & 31));
|
|
else if (vc->vc_par[0] == 3) {
|
|
vc->vc_tab_stop[0] =
|
|
vc->vc_tab_stop[1] =
|
|
vc->vc_tab_stop[2] =
|
|
vc->vc_tab_stop[3] =
|
|
vc->vc_tab_stop[4] = 0;
|
|
}
|
|
return;
|
|
case 'm':
|
|
csi_m(vc);
|
|
return;
|
|
case 'q': /* DECLL - but only 3 leds */
|
|
/* map 0,1,2,3 to 0,1,2,4 */
|
|
if (vc->vc_par[0] < 4)
|
|
setledstate(kbd_table + vc->vc_num,
|
|
(vc->vc_par[0] < 3) ? vc->vc_par[0] : 4);
|
|
return;
|
|
case 'r':
|
|
if (!vc->vc_par[0])
|
|
vc->vc_par[0]++;
|
|
if (!vc->vc_par[1])
|
|
vc->vc_par[1] = vc->vc_rows;
|
|
/* Minimum allowed region is 2 lines */
|
|
if (vc->vc_par[0] < vc->vc_par[1] &&
|
|
vc->vc_par[1] <= vc->vc_rows) {
|
|
vc->vc_top = vc->vc_par[0] - 1;
|
|
vc->vc_bottom = vc->vc_par[1];
|
|
gotoxay(vc, 0, 0);
|
|
}
|
|
return;
|
|
case 's':
|
|
save_cur(vc);
|
|
return;
|
|
case 'u':
|
|
restore_cur(vc);
|
|
return;
|
|
case 'X':
|
|
csi_X(vc, vc->vc_par[0]);
|
|
return;
|
|
case '@':
|
|
csi_at(vc, vc->vc_par[0]);
|
|
return;
|
|
case ']': /* setterm functions */
|
|
setterm_command(vc);
|
|
return;
|
|
}
|
|
return;
|
|
case ESpercent:
|
|
vc->vc_state = ESnormal;
|
|
switch (c) {
|
|
case '@': /* defined in ISO 2022 */
|
|
vc->vc_utf = 0;
|
|
return;
|
|
case 'G': /* prelim official escape code */
|
|
case '8': /* retained for compatibility */
|
|
vc->vc_utf = 1;
|
|
return;
|
|
}
|
|
return;
|
|
case ESfunckey:
|
|
vc->vc_state = ESnormal;
|
|
return;
|
|
case EShash:
|
|
vc->vc_state = ESnormal;
|
|
if (c == '8') {
|
|
/* DEC screen alignment test. kludge :-) */
|
|
vc->vc_video_erase_char =
|
|
(vc->vc_video_erase_char & 0xff00) | 'E';
|
|
csi_J(vc, 2);
|
|
vc->vc_video_erase_char =
|
|
(vc->vc_video_erase_char & 0xff00) | ' ';
|
|
do_update_region(vc, vc->vc_origin, vc->vc_screenbuf_size / 2);
|
|
}
|
|
return;
|
|
case ESsetG0:
|
|
if (c == '0')
|
|
vc->vc_G0_charset = GRAF_MAP;
|
|
else if (c == 'B')
|
|
vc->vc_G0_charset = LAT1_MAP;
|
|
else if (c == 'U')
|
|
vc->vc_G0_charset = IBMPC_MAP;
|
|
else if (c == 'K')
|
|
vc->vc_G0_charset = USER_MAP;
|
|
if (vc->vc_charset == 0)
|
|
vc->vc_translate = set_translate(vc->vc_G0_charset, vc);
|
|
vc->vc_state = ESnormal;
|
|
return;
|
|
case ESsetG1:
|
|
if (c == '0')
|
|
vc->vc_G1_charset = GRAF_MAP;
|
|
else if (c == 'B')
|
|
vc->vc_G1_charset = LAT1_MAP;
|
|
else if (c == 'U')
|
|
vc->vc_G1_charset = IBMPC_MAP;
|
|
else if (c == 'K')
|
|
vc->vc_G1_charset = USER_MAP;
|
|
if (vc->vc_charset == 1)
|
|
vc->vc_translate = set_translate(vc->vc_G1_charset, vc);
|
|
vc->vc_state = ESnormal;
|
|
return;
|
|
default:
|
|
vc->vc_state = ESnormal;
|
|
}
|
|
}
|
|
|
|
/* This is a temporary buffer used to prepare a tty console write
|
|
* so that we can easily avoid touching user space while holding the
|
|
* console spinlock. It is allocated in con_init and is shared by
|
|
* this code and the vc_screen read/write tty calls.
|
|
*
|
|
* We have to allocate this statically in the kernel data section
|
|
* since console_init (and thus con_init) are called before any
|
|
* kernel memory allocation is available.
|
|
*/
|
|
char con_buf[CON_BUF_SIZE];
|
|
DEFINE_MUTEX(con_buf_mtx);
|
|
|
|
/* is_double_width() is based on the wcwidth() implementation by
|
|
* Markus Kuhn -- 2003-05-20 (Unicode 4.0)
|
|
* Latest version: http://www.cl.cam.ac.uk/~mgk25/ucs/wcwidth.c
|
|
*/
|
|
struct interval {
|
|
uint32_t first;
|
|
uint32_t last;
|
|
};
|
|
|
|
static int bisearch(uint32_t ucs, const struct interval *table, int max)
|
|
{
|
|
int min = 0;
|
|
int mid;
|
|
|
|
if (ucs < table[0].first || ucs > table[max].last)
|
|
return 0;
|
|
while (max >= min) {
|
|
mid = (min + max) / 2;
|
|
if (ucs > table[mid].last)
|
|
min = mid + 1;
|
|
else if (ucs < table[mid].first)
|
|
max = mid - 1;
|
|
else
|
|
return 1;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static int is_double_width(uint32_t ucs)
|
|
{
|
|
static const struct interval double_width[] = {
|
|
{ 0x1100, 0x115F }, { 0x2329, 0x232A }, { 0x2E80, 0x303E },
|
|
{ 0x3040, 0xA4CF }, { 0xAC00, 0xD7A3 }, { 0xF900, 0xFAFF },
|
|
{ 0xFE30, 0xFE6F }, { 0xFF00, 0xFF60 }, { 0xFFE0, 0xFFE6 },
|
|
{ 0x20000, 0x2FFFD }, { 0x30000, 0x3FFFD }
|
|
};
|
|
return bisearch(ucs, double_width,
|
|
sizeof(double_width) / sizeof(*double_width) - 1);
|
|
}
|
|
|
|
/* acquires console_sem */
|
|
static int do_con_write(struct tty_struct *tty, const unsigned char *buf, int count)
|
|
{
|
|
#ifdef VT_BUF_VRAM_ONLY
|
|
#define FLUSH do { } while(0);
|
|
#else
|
|
#define FLUSH if (draw_x >= 0) { \
|
|
vc->vc_sw->con_putcs(vc, (u16 *)draw_from, (u16 *)draw_to - (u16 *)draw_from, vc->vc_y, draw_x); \
|
|
draw_x = -1; \
|
|
}
|
|
#endif
|
|
|
|
int c, tc, ok, n = 0, draw_x = -1;
|
|
unsigned int currcons;
|
|
unsigned long draw_from = 0, draw_to = 0;
|
|
struct vc_data *vc;
|
|
unsigned char vc_attr;
|
|
uint8_t rescan;
|
|
uint8_t inverse;
|
|
uint8_t width;
|
|
u16 himask, charmask;
|
|
const unsigned char *orig_buf = NULL;
|
|
int orig_count;
|
|
|
|
if (in_interrupt())
|
|
return count;
|
|
|
|
might_sleep();
|
|
|
|
acquire_console_sem();
|
|
vc = tty->driver_data;
|
|
if (vc == NULL) {
|
|
printk(KERN_ERR "vt: argh, driver_data is NULL !\n");
|
|
release_console_sem();
|
|
return 0;
|
|
}
|
|
|
|
currcons = vc->vc_num;
|
|
if (!vc_cons_allocated(currcons)) {
|
|
/* could this happen? */
|
|
static int error = 0;
|
|
if (!error) {
|
|
error = 1;
|
|
printk("con_write: tty %d not allocated\n", currcons+1);
|
|
}
|
|
release_console_sem();
|
|
return 0;
|
|
}
|
|
release_console_sem();
|
|
|
|
orig_buf = buf;
|
|
orig_count = count;
|
|
|
|
/* At this point 'buf' is guaranteed to be a kernel buffer
|
|
* and therefore no access to userspace (and therefore sleeping)
|
|
* will be needed. The con_buf_mtx serializes all tty based
|
|
* console rendering and vcs write/read operations. We hold
|
|
* the console spinlock during the entire write.
|
|
*/
|
|
|
|
acquire_console_sem();
|
|
|
|
vc = tty->driver_data;
|
|
if (vc == NULL) {
|
|
printk(KERN_ERR "vt: argh, driver_data _became_ NULL !\n");
|
|
release_console_sem();
|
|
goto out;
|
|
}
|
|
|
|
himask = vc->vc_hi_font_mask;
|
|
charmask = himask ? 0x1ff : 0xff;
|
|
|
|
/* undraw cursor first */
|
|
if (IS_FG(vc))
|
|
hide_cursor(vc);
|
|
|
|
while (!tty->stopped && count) {
|
|
int orig = *buf;
|
|
c = orig;
|
|
buf++;
|
|
n++;
|
|
count--;
|
|
rescan = 0;
|
|
inverse = 0;
|
|
width = 1;
|
|
|
|
/* Do no translation at all in control states */
|
|
if (vc->vc_state != ESnormal) {
|
|
tc = c;
|
|
} else if (vc->vc_utf && !vc->vc_disp_ctrl) {
|
|
/* Combine UTF-8 into Unicode in vc_utf_char.
|
|
* vc_utf_count is the number of continuation bytes still
|
|
* expected to arrive.
|
|
* vc_npar is the number of continuation bytes arrived so
|
|
* far
|
|
*/
|
|
rescan_last_byte:
|
|
if ((c & 0xc0) == 0x80) {
|
|
/* Continuation byte received */
|
|
static const uint32_t utf8_length_changes[] = { 0x0000007f, 0x000007ff, 0x0000ffff, 0x001fffff, 0x03ffffff, 0x7fffffff };
|
|
if (vc->vc_utf_count) {
|
|
vc->vc_utf_char = (vc->vc_utf_char << 6) | (c & 0x3f);
|
|
vc->vc_npar++;
|
|
if (--vc->vc_utf_count) {
|
|
/* Still need some bytes */
|
|
continue;
|
|
}
|
|
/* Got a whole character */
|
|
c = vc->vc_utf_char;
|
|
/* Reject overlong sequences */
|
|
if (c <= utf8_length_changes[vc->vc_npar - 1] ||
|
|
c > utf8_length_changes[vc->vc_npar])
|
|
c = 0xfffd;
|
|
} else {
|
|
/* Unexpected continuation byte */
|
|
vc->vc_utf_count = 0;
|
|
c = 0xfffd;
|
|
}
|
|
} else {
|
|
/* Single ASCII byte or first byte of a sequence received */
|
|
if (vc->vc_utf_count) {
|
|
/* Continuation byte expected */
|
|
rescan = 1;
|
|
vc->vc_utf_count = 0;
|
|
c = 0xfffd;
|
|
} else if (c > 0x7f) {
|
|
/* First byte of a multibyte sequence received */
|
|
vc->vc_npar = 0;
|
|
if ((c & 0xe0) == 0xc0) {
|
|
vc->vc_utf_count = 1;
|
|
vc->vc_utf_char = (c & 0x1f);
|
|
} else if ((c & 0xf0) == 0xe0) {
|
|
vc->vc_utf_count = 2;
|
|
vc->vc_utf_char = (c & 0x0f);
|
|
} else if ((c & 0xf8) == 0xf0) {
|
|
vc->vc_utf_count = 3;
|
|
vc->vc_utf_char = (c & 0x07);
|
|
} else if ((c & 0xfc) == 0xf8) {
|
|
vc->vc_utf_count = 4;
|
|
vc->vc_utf_char = (c & 0x03);
|
|
} else if ((c & 0xfe) == 0xfc) {
|
|
vc->vc_utf_count = 5;
|
|
vc->vc_utf_char = (c & 0x01);
|
|
} else {
|
|
/* 254 and 255 are invalid */
|
|
c = 0xfffd;
|
|
}
|
|
if (vc->vc_utf_count) {
|
|
/* Still need some bytes */
|
|
continue;
|
|
}
|
|
}
|
|
/* Nothing to do if an ASCII byte was received */
|
|
}
|
|
/* End of UTF-8 decoding. */
|
|
/* c is the received character, or U+FFFD for invalid sequences. */
|
|
/* Replace invalid Unicode code points with U+FFFD too */
|
|
if ((c >= 0xd800 && c <= 0xdfff) || c == 0xfffe || c == 0xffff)
|
|
c = 0xfffd;
|
|
tc = c;
|
|
} else { /* no utf or alternate charset mode */
|
|
tc = vc->vc_translate[vc->vc_toggle_meta ? (c | 0x80) : c];
|
|
}
|
|
|
|
/* If the original code was a control character we
|
|
* only allow a glyph to be displayed if the code is
|
|
* not normally used (such as for cursor movement) or
|
|
* if the disp_ctrl mode has been explicitly enabled.
|
|
* Certain characters (as given by the CTRL_ALWAYS
|
|
* bitmap) are always displayed as control characters,
|
|
* as the console would be pretty useless without
|
|
* them; to display an arbitrary font position use the
|
|
* direct-to-font zone in UTF-8 mode.
|
|
*/
|
|
ok = tc && (c >= 32 ||
|
|
!(vc->vc_disp_ctrl ? (CTRL_ALWAYS >> c) & 1 :
|
|
vc->vc_utf || ((CTRL_ACTION >> c) & 1)))
|
|
&& (c != 127 || vc->vc_disp_ctrl)
|
|
&& (c != 128+27);
|
|
|
|
if (vc->vc_state == ESnormal && ok) {
|
|
if (vc->vc_utf && !vc->vc_disp_ctrl) {
|
|
if (is_double_width(c))
|
|
width = 2;
|
|
}
|
|
/* Now try to find out how to display it */
|
|
tc = conv_uni_to_pc(vc, tc);
|
|
if (tc & ~charmask) {
|
|
if (tc == -1 || tc == -2) {
|
|
continue; /* nothing to display */
|
|
}
|
|
/* Glyph not found */
|
|
if (!(vc->vc_utf && !vc->vc_disp_ctrl) && !(c & ~charmask)) {
|
|
/* In legacy mode use the glyph we get by a 1:1 mapping.
|
|
This would make absolutely no sense with Unicode in mind. */
|
|
tc = c;
|
|
} else {
|
|
/* Display U+FFFD. If it's not found, display an inverse question mark. */
|
|
tc = conv_uni_to_pc(vc, 0xfffd);
|
|
if (tc < 0) {
|
|
inverse = 1;
|
|
tc = conv_uni_to_pc(vc, '?');
|
|
if (tc < 0) tc = '?';
|
|
}
|
|
}
|
|
}
|
|
|
|
if (!inverse) {
|
|
vc_attr = vc->vc_attr;
|
|
} else {
|
|
/* invert vc_attr */
|
|
if (!vc->vc_can_do_color) {
|
|
vc_attr = (vc->vc_attr) ^ 0x08;
|
|
} else if (vc->vc_hi_font_mask == 0x100) {
|
|
vc_attr = ((vc->vc_attr) & 0x11) | (((vc->vc_attr) & 0xe0) >> 4) | (((vc->vc_attr) & 0x0e) << 4);
|
|
} else {
|
|
vc_attr = ((vc->vc_attr) & 0x88) | (((vc->vc_attr) & 0x70) >> 4) | (((vc->vc_attr) & 0x07) << 4);
|
|
}
|
|
}
|
|
|
|
while (1) {
|
|
if (vc->vc_need_wrap || vc->vc_decim)
|
|
FLUSH
|
|
if (vc->vc_need_wrap) {
|
|
cr(vc);
|
|
lf(vc);
|
|
}
|
|
if (vc->vc_decim)
|
|
insert_char(vc, 1);
|
|
scr_writew(himask ?
|
|
((vc_attr << 8) & ~himask) + ((tc & 0x100) ? himask : 0) + (tc & 0xff) :
|
|
(vc_attr << 8) + tc,
|
|
(u16 *) vc->vc_pos);
|
|
if (DO_UPDATE(vc) && draw_x < 0) {
|
|
draw_x = vc->vc_x;
|
|
draw_from = vc->vc_pos;
|
|
}
|
|
if (vc->vc_x == vc->vc_cols - 1) {
|
|
vc->vc_need_wrap = vc->vc_decawm;
|
|
draw_to = vc->vc_pos + 2;
|
|
} else {
|
|
vc->vc_x++;
|
|
draw_to = (vc->vc_pos += 2);
|
|
}
|
|
|
|
if (!--width) break;
|
|
|
|
tc = conv_uni_to_pc(vc, ' '); /* A space is printed in the second column */
|
|
if (tc < 0) tc = ' ';
|
|
}
|
|
|
|
if (rescan) {
|
|
rescan = 0;
|
|
inverse = 0;
|
|
width = 1;
|
|
c = orig;
|
|
goto rescan_last_byte;
|
|
}
|
|
continue;
|
|
}
|
|
FLUSH
|
|
do_con_trol(tty, vc, orig);
|
|
}
|
|
FLUSH
|
|
console_conditional_schedule();
|
|
release_console_sem();
|
|
|
|
out:
|
|
return n;
|
|
#undef FLUSH
|
|
}
|
|
|
|
/*
|
|
* This is the console switching callback.
|
|
*
|
|
* Doing console switching in a process context allows
|
|
* us to do the switches asynchronously (needed when we want
|
|
* to switch due to a keyboard interrupt). Synchronization
|
|
* with other console code and prevention of re-entrancy is
|
|
* ensured with console_sem.
|
|
*/
|
|
static void console_callback(struct work_struct *ignored)
|
|
{
|
|
acquire_console_sem();
|
|
|
|
if (want_console >= 0) {
|
|
if (want_console != fg_console &&
|
|
vc_cons_allocated(want_console)) {
|
|
hide_cursor(vc_cons[fg_console].d);
|
|
change_console(vc_cons[want_console].d);
|
|
/* we only changed when the console had already
|
|
been allocated - a new console is not created
|
|
in an interrupt routine */
|
|
}
|
|
want_console = -1;
|
|
}
|
|
if (do_poke_blanked_console) { /* do not unblank for a LED change */
|
|
do_poke_blanked_console = 0;
|
|
poke_blanked_console();
|
|
}
|
|
if (scrollback_delta) {
|
|
struct vc_data *vc = vc_cons[fg_console].d;
|
|
clear_selection();
|
|
if (vc->vc_mode == KD_TEXT)
|
|
vc->vc_sw->con_scrolldelta(vc, scrollback_delta);
|
|
scrollback_delta = 0;
|
|
}
|
|
if (blank_timer_expired) {
|
|
do_blank_screen(0);
|
|
blank_timer_expired = 0;
|
|
}
|
|
|
|
release_console_sem();
|
|
}
|
|
|
|
int set_console(int nr)
|
|
{
|
|
struct vc_data *vc = vc_cons[fg_console].d;
|
|
|
|
if (!vc_cons_allocated(nr) || vt_dont_switch ||
|
|
(vc->vt_mode.mode == VT_AUTO && vc->vc_mode == KD_GRAPHICS)) {
|
|
|
|
/*
|
|
* Console switch will fail in console_callback() or
|
|
* change_console() so there is no point scheduling
|
|
* the callback
|
|
*
|
|
* Existing set_console() users don't check the return
|
|
* value so this shouldn't break anything
|
|
*/
|
|
return -EINVAL;
|
|
}
|
|
|
|
want_console = nr;
|
|
schedule_console_callback();
|
|
|
|
return 0;
|
|
}
|
|
|
|
struct tty_driver *console_driver;
|
|
|
|
#ifdef CONFIG_VT_CONSOLE
|
|
|
|
/*
|
|
* Console on virtual terminal
|
|
*
|
|
* The console must be locked when we get here.
|
|
*/
|
|
|
|
static void vt_console_print(struct console *co, const char *b, unsigned count)
|
|
{
|
|
struct vc_data *vc = vc_cons[fg_console].d;
|
|
unsigned char c;
|
|
static unsigned long printing;
|
|
const ushort *start;
|
|
ushort cnt = 0;
|
|
ushort myx;
|
|
|
|
/* console busy or not yet initialized */
|
|
if (!printable || test_and_set_bit(0, &printing))
|
|
return;
|
|
|
|
if (kmsg_redirect && vc_cons_allocated(kmsg_redirect - 1))
|
|
vc = vc_cons[kmsg_redirect - 1].d;
|
|
|
|
/* read `x' only after setting currcons properly (otherwise
|
|
the `x' macro will read the x of the foreground console). */
|
|
myx = vc->vc_x;
|
|
|
|
if (!vc_cons_allocated(fg_console)) {
|
|
/* impossible */
|
|
/* printk("vt_console_print: tty %d not allocated ??\n", currcons+1); */
|
|
goto quit;
|
|
}
|
|
|
|
if (vc->vc_mode != KD_TEXT)
|
|
goto quit;
|
|
|
|
/* undraw cursor first */
|
|
if (IS_FG(vc))
|
|
hide_cursor(vc);
|
|
|
|
start = (ushort *)vc->vc_pos;
|
|
|
|
/* Contrived structure to try to emulate original need_wrap behaviour
|
|
* Problems caused when we have need_wrap set on '\n' character */
|
|
while (count--) {
|
|
c = *b++;
|
|
if (c == 10 || c == 13 || c == 8 || vc->vc_need_wrap) {
|
|
if (cnt > 0) {
|
|
if (CON_IS_VISIBLE(vc))
|
|
vc->vc_sw->con_putcs(vc, start, cnt, vc->vc_y, vc->vc_x);
|
|
vc->vc_x += cnt;
|
|
if (vc->vc_need_wrap)
|
|
vc->vc_x--;
|
|
cnt = 0;
|
|
}
|
|
if (c == 8) { /* backspace */
|
|
bs(vc);
|
|
start = (ushort *)vc->vc_pos;
|
|
myx = vc->vc_x;
|
|
continue;
|
|
}
|
|
if (c != 13)
|
|
lf(vc);
|
|
cr(vc);
|
|
start = (ushort *)vc->vc_pos;
|
|
myx = vc->vc_x;
|
|
if (c == 10 || c == 13)
|
|
continue;
|
|
}
|
|
scr_writew((vc->vc_attr << 8) + c, (unsigned short *)vc->vc_pos);
|
|
cnt++;
|
|
if (myx == vc->vc_cols - 1) {
|
|
vc->vc_need_wrap = 1;
|
|
continue;
|
|
}
|
|
vc->vc_pos += 2;
|
|
myx++;
|
|
}
|
|
if (cnt > 0) {
|
|
if (CON_IS_VISIBLE(vc))
|
|
vc->vc_sw->con_putcs(vc, start, cnt, vc->vc_y, vc->vc_x);
|
|
vc->vc_x += cnt;
|
|
if (vc->vc_x == vc->vc_cols) {
|
|
vc->vc_x--;
|
|
vc->vc_need_wrap = 1;
|
|
}
|
|
}
|
|
set_cursor(vc);
|
|
|
|
quit:
|
|
clear_bit(0, &printing);
|
|
}
|
|
|
|
static struct tty_driver *vt_console_device(struct console *c, int *index)
|
|
{
|
|
*index = c->index ? c->index-1 : fg_console;
|
|
return console_driver;
|
|
}
|
|
|
|
static struct console vt_console_driver = {
|
|
.name = "tty",
|
|
.write = vt_console_print,
|
|
.device = vt_console_device,
|
|
.unblank = unblank_screen,
|
|
.flags = CON_PRINTBUFFER,
|
|
.index = -1,
|
|
};
|
|
#endif
|
|
|
|
/*
|
|
* Handling of Linux-specific VC ioctls
|
|
*/
|
|
|
|
/*
|
|
* Generally a bit racy with respect to console_sem().
|
|
*
|
|
* There are some functions which don't need it.
|
|
*
|
|
* There are some functions which can sleep for arbitrary periods
|
|
* (paste_selection) but we don't need the lock there anyway.
|
|
*
|
|
* set_selection has locking, and definitely needs it
|
|
*/
|
|
|
|
int tioclinux(struct tty_struct *tty, unsigned long arg)
|
|
{
|
|
char type, data;
|
|
char __user *p = (char __user *)arg;
|
|
int lines;
|
|
int ret;
|
|
|
|
if (tty->driver->type != TTY_DRIVER_TYPE_CONSOLE)
|
|
return -EINVAL;
|
|
if (current->signal->tty != tty && !capable(CAP_SYS_ADMIN))
|
|
return -EPERM;
|
|
if (get_user(type, p))
|
|
return -EFAULT;
|
|
ret = 0;
|
|
switch (type)
|
|
{
|
|
case TIOCL_SETSEL:
|
|
acquire_console_sem();
|
|
ret = set_selection((struct tiocl_selection __user *)(p+1), tty);
|
|
release_console_sem();
|
|
break;
|
|
case TIOCL_PASTESEL:
|
|
ret = paste_selection(tty);
|
|
break;
|
|
case TIOCL_UNBLANKSCREEN:
|
|
acquire_console_sem();
|
|
unblank_screen();
|
|
release_console_sem();
|
|
break;
|
|
case TIOCL_SELLOADLUT:
|
|
ret = sel_loadlut(p);
|
|
break;
|
|
case TIOCL_GETSHIFTSTATE:
|
|
|
|
/*
|
|
* Make it possible to react to Shift+Mousebutton.
|
|
* Note that 'shift_state' is an undocumented
|
|
* kernel-internal variable; programs not closely
|
|
* related to the kernel should not use this.
|
|
*/
|
|
data = shift_state;
|
|
ret = __put_user(data, p);
|
|
break;
|
|
case TIOCL_GETMOUSEREPORTING:
|
|
data = mouse_reporting();
|
|
ret = __put_user(data, p);
|
|
break;
|
|
case TIOCL_SETVESABLANK:
|
|
ret = set_vesa_blanking(p);
|
|
break;
|
|
case TIOCL_GETKMSGREDIRECT:
|
|
data = kmsg_redirect;
|
|
ret = __put_user(data, p);
|
|
break;
|
|
case TIOCL_SETKMSGREDIRECT:
|
|
if (!capable(CAP_SYS_ADMIN)) {
|
|
ret = -EPERM;
|
|
} else {
|
|
if (get_user(data, p+1))
|
|
ret = -EFAULT;
|
|
else
|
|
kmsg_redirect = data;
|
|
}
|
|
break;
|
|
case TIOCL_GETFGCONSOLE:
|
|
ret = fg_console;
|
|
break;
|
|
case TIOCL_SCROLLCONSOLE:
|
|
if (get_user(lines, (s32 __user *)(p+4))) {
|
|
ret = -EFAULT;
|
|
} else {
|
|
scrollfront(vc_cons[fg_console].d, lines);
|
|
ret = 0;
|
|
}
|
|
break;
|
|
case TIOCL_BLANKSCREEN: /* until explicitly unblanked, not only poked */
|
|
acquire_console_sem();
|
|
ignore_poke = 1;
|
|
do_blank_screen(0);
|
|
release_console_sem();
|
|
break;
|
|
case TIOCL_BLANKEDSCREEN:
|
|
ret = console_blanked;
|
|
break;
|
|
default:
|
|
ret = -EINVAL;
|
|
break;
|
|
}
|
|
return ret;
|
|
}
|
|
|
|
/*
|
|
* /dev/ttyN handling
|
|
*/
|
|
|
|
static int con_write(struct tty_struct *tty, const unsigned char *buf, int count)
|
|
{
|
|
int retval;
|
|
|
|
retval = do_con_write(tty, buf, count);
|
|
con_flush_chars(tty);
|
|
|
|
return retval;
|
|
}
|
|
|
|
static void con_put_char(struct tty_struct *tty, unsigned char ch)
|
|
{
|
|
if (in_interrupt())
|
|
return; /* n_r3964 calls put_char() from interrupt context */
|
|
do_con_write(tty, &ch, 1);
|
|
}
|
|
|
|
static int con_write_room(struct tty_struct *tty)
|
|
{
|
|
if (tty->stopped)
|
|
return 0;
|
|
return 4096; /* No limit, really; we're not buffering */
|
|
}
|
|
|
|
static int con_chars_in_buffer(struct tty_struct *tty)
|
|
{
|
|
return 0; /* we're not buffering */
|
|
}
|
|
|
|
/*
|
|
* con_throttle and con_unthrottle are only used for
|
|
* paste_selection(), which has to stuff in a large number of
|
|
* characters...
|
|
*/
|
|
static void con_throttle(struct tty_struct *tty)
|
|
{
|
|
}
|
|
|
|
static void con_unthrottle(struct tty_struct *tty)
|
|
{
|
|
struct vc_data *vc = tty->driver_data;
|
|
|
|
wake_up_interruptible(&vc->paste_wait);
|
|
}
|
|
|
|
/*
|
|
* Turn the Scroll-Lock LED on when the tty is stopped
|
|
*/
|
|
static void con_stop(struct tty_struct *tty)
|
|
{
|
|
int console_num;
|
|
if (!tty)
|
|
return;
|
|
console_num = tty->index;
|
|
if (!vc_cons_allocated(console_num))
|
|
return;
|
|
set_vc_kbd_led(kbd_table + console_num, VC_SCROLLOCK);
|
|
set_leds();
|
|
}
|
|
|
|
/*
|
|
* Turn the Scroll-Lock LED off when the console is started
|
|
*/
|
|
static void con_start(struct tty_struct *tty)
|
|
{
|
|
int console_num;
|
|
if (!tty)
|
|
return;
|
|
console_num = tty->index;
|
|
if (!vc_cons_allocated(console_num))
|
|
return;
|
|
clr_vc_kbd_led(kbd_table + console_num, VC_SCROLLOCK);
|
|
set_leds();
|
|
}
|
|
|
|
static void con_flush_chars(struct tty_struct *tty)
|
|
{
|
|
struct vc_data *vc;
|
|
|
|
if (in_interrupt()) /* from flush_to_ldisc */
|
|
return;
|
|
|
|
/* if we race with con_close(), vt may be null */
|
|
acquire_console_sem();
|
|
vc = tty->driver_data;
|
|
if (vc)
|
|
set_cursor(vc);
|
|
release_console_sem();
|
|
}
|
|
|
|
/*
|
|
* Allocate the console screen memory.
|
|
*/
|
|
static int con_open(struct tty_struct *tty, struct file *filp)
|
|
{
|
|
unsigned int currcons = tty->index;
|
|
int ret = 0;
|
|
|
|
acquire_console_sem();
|
|
if (tty->driver_data == NULL) {
|
|
ret = vc_allocate(currcons);
|
|
if (ret == 0) {
|
|
struct vc_data *vc = vc_cons[currcons].d;
|
|
tty->driver_data = vc;
|
|
vc->vc_tty = tty;
|
|
|
|
if (!tty->winsize.ws_row && !tty->winsize.ws_col) {
|
|
tty->winsize.ws_row = vc_cons[currcons].d->vc_rows;
|
|
tty->winsize.ws_col = vc_cons[currcons].d->vc_cols;
|
|
}
|
|
release_console_sem();
|
|
vcs_make_sysfs(tty);
|
|
return ret;
|
|
}
|
|
}
|
|
release_console_sem();
|
|
return ret;
|
|
}
|
|
|
|
/*
|
|
* We take tty_mutex in here to prevent another thread from coming in via init_dev
|
|
* and taking a ref against the tty while we're in the process of forgetting
|
|
* about it and cleaning things up.
|
|
*
|
|
* This is because vcs_remove_sysfs() can sleep and will drop the BKL.
|
|
*/
|
|
static void con_close(struct tty_struct *tty, struct file *filp)
|
|
{
|
|
mutex_lock(&tty_mutex);
|
|
acquire_console_sem();
|
|
if (tty && tty->count == 1) {
|
|
struct vc_data *vc = tty->driver_data;
|
|
|
|
if (vc)
|
|
vc->vc_tty = NULL;
|
|
tty->driver_data = NULL;
|
|
release_console_sem();
|
|
vcs_remove_sysfs(tty);
|
|
mutex_unlock(&tty_mutex);
|
|
/*
|
|
* tty_mutex is released, but we still hold BKL, so there is
|
|
* still exclusion against init_dev()
|
|
*/
|
|
return;
|
|
}
|
|
release_console_sem();
|
|
mutex_unlock(&tty_mutex);
|
|
}
|
|
|
|
static int default_italic_color = 2; // green (ASCII)
|
|
static int default_underline_color = 3; // cyan (ASCII)
|
|
module_param_named(italic, default_italic_color, int, S_IRUGO | S_IWUSR);
|
|
module_param_named(underline, default_underline_color, int, S_IRUGO | S_IWUSR);
|
|
|
|
static void vc_init(struct vc_data *vc, unsigned int rows,
|
|
unsigned int cols, int do_clear)
|
|
{
|
|
int j, k ;
|
|
|
|
vc->vc_cols = cols;
|
|
vc->vc_rows = rows;
|
|
vc->vc_size_row = cols << 1;
|
|
vc->vc_screenbuf_size = vc->vc_rows * vc->vc_size_row;
|
|
|
|
set_origin(vc);
|
|
vc->vc_pos = vc->vc_origin;
|
|
reset_vc(vc);
|
|
for (j=k=0; j<16; j++) {
|
|
vc->vc_palette[k++] = default_red[j] ;
|
|
vc->vc_palette[k++] = default_grn[j] ;
|
|
vc->vc_palette[k++] = default_blu[j] ;
|
|
}
|
|
vc->vc_def_color = 0x07; /* white */
|
|
vc->vc_ulcolor = default_underline_color;
|
|
vc->vc_itcolor = default_italic_color;
|
|
vc->vc_halfcolor = 0x08; /* grey */
|
|
init_waitqueue_head(&vc->paste_wait);
|
|
reset_terminal(vc, do_clear);
|
|
}
|
|
|
|
/*
|
|
* This routine initializes console interrupts, and does nothing
|
|
* else. If you want the screen to clear, call tty_write with
|
|
* the appropriate escape-sequence.
|
|
*/
|
|
|
|
static int __init con_init(void)
|
|
{
|
|
const char *display_desc = NULL;
|
|
struct vc_data *vc;
|
|
unsigned int currcons = 0, i;
|
|
|
|
acquire_console_sem();
|
|
|
|
if (conswitchp)
|
|
display_desc = conswitchp->con_startup();
|
|
if (!display_desc) {
|
|
fg_console = 0;
|
|
release_console_sem();
|
|
return 0;
|
|
}
|
|
|
|
for (i = 0; i < MAX_NR_CON_DRIVER; i++) {
|
|
struct con_driver *con_driver = ®istered_con_driver[i];
|
|
|
|
if (con_driver->con == NULL) {
|
|
con_driver->con = conswitchp;
|
|
con_driver->desc = display_desc;
|
|
con_driver->flag = CON_DRIVER_FLAG_INIT;
|
|
con_driver->first = 0;
|
|
con_driver->last = MAX_NR_CONSOLES - 1;
|
|
break;
|
|
}
|
|
}
|
|
|
|
for (i = 0; i < MAX_NR_CONSOLES; i++)
|
|
con_driver_map[i] = conswitchp;
|
|
|
|
if (blankinterval) {
|
|
blank_state = blank_normal_wait;
|
|
mod_timer(&console_timer, jiffies + blankinterval);
|
|
}
|
|
|
|
/*
|
|
* kmalloc is not running yet - we use the bootmem allocator.
|
|
*/
|
|
for (currcons = 0; currcons < MIN_NR_CONSOLES; currcons++) {
|
|
vc_cons[currcons].d = vc = alloc_bootmem(sizeof(struct vc_data));
|
|
INIT_WORK(&vc_cons[currcons].SAK_work, vc_SAK);
|
|
visual_init(vc, currcons, 1);
|
|
vc->vc_screenbuf = (unsigned short *)alloc_bootmem(vc->vc_screenbuf_size);
|
|
vc->vc_kmalloced = 0;
|
|
vc_init(vc, vc->vc_rows, vc->vc_cols,
|
|
currcons || !vc->vc_sw->con_save_screen);
|
|
}
|
|
currcons = fg_console = 0;
|
|
master_display_fg = vc = vc_cons[currcons].d;
|
|
set_origin(vc);
|
|
save_screen(vc);
|
|
gotoxy(vc, vc->vc_x, vc->vc_y);
|
|
csi_J(vc, 0);
|
|
update_screen(vc);
|
|
printk("Console: %s %s %dx%d",
|
|
vc->vc_can_do_color ? "colour" : "mono",
|
|
display_desc, vc->vc_cols, vc->vc_rows);
|
|
printable = 1;
|
|
printk("\n");
|
|
|
|
release_console_sem();
|
|
|
|
#ifdef CONFIG_VT_CONSOLE
|
|
register_console(&vt_console_driver);
|
|
#endif
|
|
return 0;
|
|
}
|
|
console_initcall(con_init);
|
|
|
|
static const struct tty_operations con_ops = {
|
|
.open = con_open,
|
|
.close = con_close,
|
|
.write = con_write,
|
|
.write_room = con_write_room,
|
|
.put_char = con_put_char,
|
|
.flush_chars = con_flush_chars,
|
|
.chars_in_buffer = con_chars_in_buffer,
|
|
.ioctl = vt_ioctl,
|
|
.stop = con_stop,
|
|
.start = con_start,
|
|
.throttle = con_throttle,
|
|
.unthrottle = con_unthrottle,
|
|
};
|
|
|
|
int __init vty_init(void)
|
|
{
|
|
vcs_init();
|
|
|
|
console_driver = alloc_tty_driver(MAX_NR_CONSOLES);
|
|
if (!console_driver)
|
|
panic("Couldn't allocate console driver\n");
|
|
console_driver->owner = THIS_MODULE;
|
|
console_driver->name = "tty";
|
|
console_driver->name_base = 1;
|
|
console_driver->major = TTY_MAJOR;
|
|
console_driver->minor_start = 1;
|
|
console_driver->type = TTY_DRIVER_TYPE_CONSOLE;
|
|
console_driver->init_termios = tty_std_termios;
|
|
console_driver->flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_RESET_TERMIOS;
|
|
tty_set_operations(console_driver, &con_ops);
|
|
if (tty_register_driver(console_driver))
|
|
panic("Couldn't register console driver\n");
|
|
|
|
kbd_init();
|
|
console_map_init();
|
|
#ifdef CONFIG_PROM_CONSOLE
|
|
prom_con_init();
|
|
#endif
|
|
#ifdef CONFIG_MDA_CONSOLE
|
|
mda_console_init();
|
|
#endif
|
|
return 0;
|
|
}
|
|
|
|
#ifndef VT_SINGLE_DRIVER
|
|
#include <linux/device.h>
|
|
|
|
static struct class *vtconsole_class;
|
|
|
|
static int bind_con_driver(const struct consw *csw, int first, int last,
|
|
int deflt)
|
|
{
|
|
struct module *owner = csw->owner;
|
|
const char *desc = NULL;
|
|
struct con_driver *con_driver;
|
|
int i, j = -1, k = -1, retval = -ENODEV;
|
|
|
|
if (!try_module_get(owner))
|
|
return -ENODEV;
|
|
|
|
acquire_console_sem();
|
|
|
|
/* check if driver is registered */
|
|
for (i = 0; i < MAX_NR_CON_DRIVER; i++) {
|
|
con_driver = ®istered_con_driver[i];
|
|
|
|
if (con_driver->con == csw) {
|
|
desc = con_driver->desc;
|
|
retval = 0;
|
|
break;
|
|
}
|
|
}
|
|
|
|
if (retval)
|
|
goto err;
|
|
|
|
if (!(con_driver->flag & CON_DRIVER_FLAG_INIT)) {
|
|
csw->con_startup();
|
|
con_driver->flag |= CON_DRIVER_FLAG_INIT;
|
|
}
|
|
|
|
if (deflt) {
|
|
if (conswitchp)
|
|
module_put(conswitchp->owner);
|
|
|
|
__module_get(owner);
|
|
conswitchp = csw;
|
|
}
|
|
|
|
first = max(first, con_driver->first);
|
|
last = min(last, con_driver->last);
|
|
|
|
for (i = first; i <= last; i++) {
|
|
int old_was_color;
|
|
struct vc_data *vc = vc_cons[i].d;
|
|
|
|
if (con_driver_map[i])
|
|
module_put(con_driver_map[i]->owner);
|
|
__module_get(owner);
|
|
con_driver_map[i] = csw;
|
|
|
|
if (!vc || !vc->vc_sw)
|
|
continue;
|
|
|
|
j = i;
|
|
|
|
if (CON_IS_VISIBLE(vc)) {
|
|
k = i;
|
|
save_screen(vc);
|
|
}
|
|
|
|
old_was_color = vc->vc_can_do_color;
|
|
vc->vc_sw->con_deinit(vc);
|
|
vc->vc_origin = (unsigned long)vc->vc_screenbuf;
|
|
visual_init(vc, i, 0);
|
|
set_origin(vc);
|
|
update_attr(vc);
|
|
|
|
/* If the console changed between mono <-> color, then
|
|
* the attributes in the screenbuf will be wrong. The
|
|
* following resets all attributes to something sane.
|
|
*/
|
|
if (old_was_color != vc->vc_can_do_color)
|
|
clear_buffer_attributes(vc);
|
|
}
|
|
|
|
printk("Console: switching ");
|
|
if (!deflt)
|
|
printk("consoles %d-%d ", first+1, last+1);
|
|
if (j >= 0) {
|
|
struct vc_data *vc = vc_cons[j].d;
|
|
|
|
printk("to %s %s %dx%d\n",
|
|
vc->vc_can_do_color ? "colour" : "mono",
|
|
desc, vc->vc_cols, vc->vc_rows);
|
|
|
|
if (k >= 0) {
|
|
vc = vc_cons[k].d;
|
|
update_screen(vc);
|
|
}
|
|
} else
|
|
printk("to %s\n", desc);
|
|
|
|
retval = 0;
|
|
err:
|
|
release_console_sem();
|
|
module_put(owner);
|
|
return retval;
|
|
};
|
|
|
|
#ifdef CONFIG_VT_HW_CONSOLE_BINDING
|
|
static int con_is_graphics(const struct consw *csw, int first, int last)
|
|
{
|
|
int i, retval = 0;
|
|
|
|
for (i = first; i <= last; i++) {
|
|
struct vc_data *vc = vc_cons[i].d;
|
|
|
|
if (vc && vc->vc_mode == KD_GRAPHICS) {
|
|
retval = 1;
|
|
break;
|
|
}
|
|
}
|
|
|
|
return retval;
|
|
}
|
|
|
|
static int unbind_con_driver(const struct consw *csw, int first, int last,
|
|
int deflt)
|
|
{
|
|
struct module *owner = csw->owner;
|
|
const struct consw *defcsw = NULL;
|
|
struct con_driver *con_driver = NULL, *con_back = NULL;
|
|
int i, retval = -ENODEV;
|
|
|
|
if (!try_module_get(owner))
|
|
return -ENODEV;
|
|
|
|
acquire_console_sem();
|
|
|
|
/* check if driver is registered and if it is unbindable */
|
|
for (i = 0; i < MAX_NR_CON_DRIVER; i++) {
|
|
con_driver = ®istered_con_driver[i];
|
|
|
|
if (con_driver->con == csw &&
|
|
con_driver->flag & CON_DRIVER_FLAG_MODULE) {
|
|
retval = 0;
|
|
break;
|
|
}
|
|
}
|
|
|
|
if (retval) {
|
|
release_console_sem();
|
|
goto err;
|
|
}
|
|
|
|
retval = -ENODEV;
|
|
|
|
/* check if backup driver exists */
|
|
for (i = 0; i < MAX_NR_CON_DRIVER; i++) {
|
|
con_back = ®istered_con_driver[i];
|
|
|
|
if (con_back->con &&
|
|
!(con_back->flag & CON_DRIVER_FLAG_MODULE)) {
|
|
defcsw = con_back->con;
|
|
retval = 0;
|
|
break;
|
|
}
|
|
}
|
|
|
|
if (retval) {
|
|
release_console_sem();
|
|
goto err;
|
|
}
|
|
|
|
if (!con_is_bound(csw)) {
|
|
release_console_sem();
|
|
goto err;
|
|
}
|
|
|
|
first = max(first, con_driver->first);
|
|
last = min(last, con_driver->last);
|
|
|
|
for (i = first; i <= last; i++) {
|
|
if (con_driver_map[i] == csw) {
|
|
module_put(csw->owner);
|
|
con_driver_map[i] = NULL;
|
|
}
|
|
}
|
|
|
|
if (!con_is_bound(defcsw)) {
|
|
const struct consw *defconsw = conswitchp;
|
|
|
|
defcsw->con_startup();
|
|
con_back->flag |= CON_DRIVER_FLAG_INIT;
|
|
/*
|
|
* vgacon may change the default driver to point
|
|
* to dummycon, we restore it here...
|
|
*/
|
|
conswitchp = defconsw;
|
|
}
|
|
|
|
if (!con_is_bound(csw))
|
|
con_driver->flag &= ~CON_DRIVER_FLAG_INIT;
|
|
|
|
release_console_sem();
|
|
/* ignore return value, binding should not fail */
|
|
bind_con_driver(defcsw, first, last, deflt);
|
|
err:
|
|
module_put(owner);
|
|
return retval;
|
|
|
|
}
|
|
|
|
static int vt_bind(struct con_driver *con)
|
|
{
|
|
const struct consw *defcsw = NULL, *csw = NULL;
|
|
int i, more = 1, first = -1, last = -1, deflt = 0;
|
|
|
|
if (!con->con || !(con->flag & CON_DRIVER_FLAG_MODULE) ||
|
|
con_is_graphics(con->con, con->first, con->last))
|
|
goto err;
|
|
|
|
csw = con->con;
|
|
|
|
for (i = 0; i < MAX_NR_CON_DRIVER; i++) {
|
|
struct con_driver *con = ®istered_con_driver[i];
|
|
|
|
if (con->con && !(con->flag & CON_DRIVER_FLAG_MODULE)) {
|
|
defcsw = con->con;
|
|
break;
|
|
}
|
|
}
|
|
|
|
if (!defcsw)
|
|
goto err;
|
|
|
|
while (more) {
|
|
more = 0;
|
|
|
|
for (i = con->first; i <= con->last; i++) {
|
|
if (con_driver_map[i] == defcsw) {
|
|
if (first == -1)
|
|
first = i;
|
|
last = i;
|
|
more = 1;
|
|
} else if (first != -1)
|
|
break;
|
|
}
|
|
|
|
if (first == 0 && last == MAX_NR_CONSOLES -1)
|
|
deflt = 1;
|
|
|
|
if (first != -1)
|
|
bind_con_driver(csw, first, last, deflt);
|
|
|
|
first = -1;
|
|
last = -1;
|
|
deflt = 0;
|
|
}
|
|
|
|
err:
|
|
return 0;
|
|
}
|
|
|
|
static int vt_unbind(struct con_driver *con)
|
|
{
|
|
const struct consw *csw = NULL;
|
|
int i, more = 1, first = -1, last = -1, deflt = 0;
|
|
|
|
if (!con->con || !(con->flag & CON_DRIVER_FLAG_MODULE) ||
|
|
con_is_graphics(con->con, con->first, con->last))
|
|
goto err;
|
|
|
|
csw = con->con;
|
|
|
|
while (more) {
|
|
more = 0;
|
|
|
|
for (i = con->first; i <= con->last; i++) {
|
|
if (con_driver_map[i] == csw) {
|
|
if (first == -1)
|
|
first = i;
|
|
last = i;
|
|
more = 1;
|
|
} else if (first != -1)
|
|
break;
|
|
}
|
|
|
|
if (first == 0 && last == MAX_NR_CONSOLES -1)
|
|
deflt = 1;
|
|
|
|
if (first != -1)
|
|
unbind_con_driver(csw, first, last, deflt);
|
|
|
|
first = -1;
|
|
last = -1;
|
|
deflt = 0;
|
|
}
|
|
|
|
err:
|
|
return 0;
|
|
}
|
|
#else
|
|
static inline int vt_bind(struct con_driver *con)
|
|
{
|
|
return 0;
|
|
}
|
|
static inline int vt_unbind(struct con_driver *con)
|
|
{
|
|
return 0;
|
|
}
|
|
#endif /* CONFIG_VT_HW_CONSOLE_BINDING */
|
|
|
|
static ssize_t store_bind(struct device *dev, struct device_attribute *attr,
|
|
const char *buf, size_t count)
|
|
{
|
|
struct con_driver *con = dev_get_drvdata(dev);
|
|
int bind = simple_strtoul(buf, NULL, 0);
|
|
|
|
if (bind)
|
|
vt_bind(con);
|
|
else
|
|
vt_unbind(con);
|
|
|
|
return count;
|
|
}
|
|
|
|
static ssize_t show_bind(struct device *dev, struct device_attribute *attr,
|
|
char *buf)
|
|
{
|
|
struct con_driver *con = dev_get_drvdata(dev);
|
|
int bind = con_is_bound(con->con);
|
|
|
|
return snprintf(buf, PAGE_SIZE, "%i\n", bind);
|
|
}
|
|
|
|
static ssize_t show_name(struct device *dev, struct device_attribute *attr,
|
|
char *buf)
|
|
{
|
|
struct con_driver *con = dev_get_drvdata(dev);
|
|
|
|
return snprintf(buf, PAGE_SIZE, "%s %s\n",
|
|
(con->flag & CON_DRIVER_FLAG_MODULE) ? "(M)" : "(S)",
|
|
con->desc);
|
|
|
|
}
|
|
|
|
static struct device_attribute device_attrs[] = {
|
|
__ATTR(bind, S_IRUGO|S_IWUSR, show_bind, store_bind),
|
|
__ATTR(name, S_IRUGO, show_name, NULL),
|
|
};
|
|
|
|
static int vtconsole_init_device(struct con_driver *con)
|
|
{
|
|
int i;
|
|
int error = 0;
|
|
|
|
con->flag |= CON_DRIVER_FLAG_ATTR;
|
|
dev_set_drvdata(con->dev, con);
|
|
for (i = 0; i < ARRAY_SIZE(device_attrs); i++) {
|
|
error = device_create_file(con->dev, &device_attrs[i]);
|
|
if (error)
|
|
break;
|
|
}
|
|
|
|
if (error) {
|
|
while (--i >= 0)
|
|
device_remove_file(con->dev, &device_attrs[i]);
|
|
con->flag &= ~CON_DRIVER_FLAG_ATTR;
|
|
}
|
|
|
|
return error;
|
|
}
|
|
|
|
static void vtconsole_deinit_device(struct con_driver *con)
|
|
{
|
|
int i;
|
|
|
|
if (con->flag & CON_DRIVER_FLAG_ATTR) {
|
|
for (i = 0; i < ARRAY_SIZE(device_attrs); i++)
|
|
device_remove_file(con->dev, &device_attrs[i]);
|
|
con->flag &= ~CON_DRIVER_FLAG_ATTR;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* con_is_bound - checks if driver is bound to the console
|
|
* @csw: console driver
|
|
*
|
|
* RETURNS: zero if unbound, nonzero if bound
|
|
*
|
|
* Drivers can call this and if zero, they should release
|
|
* all resources allocated on con_startup()
|
|
*/
|
|
int con_is_bound(const struct consw *csw)
|
|
{
|
|
int i, bound = 0;
|
|
|
|
for (i = 0; i < MAX_NR_CONSOLES; i++) {
|
|
if (con_driver_map[i] == csw) {
|
|
bound = 1;
|
|
break;
|
|
}
|
|
}
|
|
|
|
return bound;
|
|
}
|
|
EXPORT_SYMBOL(con_is_bound);
|
|
|
|
/**
|
|
* register_con_driver - register console driver to console layer
|
|
* @csw: console driver
|
|
* @first: the first console to take over, minimum value is 0
|
|
* @last: the last console to take over, maximum value is MAX_NR_CONSOLES -1
|
|
*
|
|
* DESCRIPTION: This function registers a console driver which can later
|
|
* bind to a range of consoles specified by @first and @last. It will
|
|
* also initialize the console driver by calling con_startup().
|
|
*/
|
|
int register_con_driver(const struct consw *csw, int first, int last)
|
|
{
|
|
struct module *owner = csw->owner;
|
|
struct con_driver *con_driver;
|
|
const char *desc;
|
|
int i, retval = 0;
|
|
|
|
if (!try_module_get(owner))
|
|
return -ENODEV;
|
|
|
|
acquire_console_sem();
|
|
|
|
for (i = 0; i < MAX_NR_CON_DRIVER; i++) {
|
|
con_driver = ®istered_con_driver[i];
|
|
|
|
/* already registered */
|
|
if (con_driver->con == csw)
|
|
retval = -EINVAL;
|
|
}
|
|
|
|
if (retval)
|
|
goto err;
|
|
|
|
desc = csw->con_startup();
|
|
|
|
if (!desc)
|
|
goto err;
|
|
|
|
retval = -EINVAL;
|
|
|
|
for (i = 0; i < MAX_NR_CON_DRIVER; i++) {
|
|
con_driver = ®istered_con_driver[i];
|
|
|
|
if (con_driver->con == NULL) {
|
|
con_driver->con = csw;
|
|
con_driver->desc = desc;
|
|
con_driver->node = i;
|
|
con_driver->flag = CON_DRIVER_FLAG_MODULE |
|
|
CON_DRIVER_FLAG_INIT;
|
|
con_driver->first = first;
|
|
con_driver->last = last;
|
|
retval = 0;
|
|
break;
|
|
}
|
|
}
|
|
|
|
if (retval)
|
|
goto err;
|
|
|
|
con_driver->dev = device_create(vtconsole_class, NULL,
|
|
MKDEV(0, con_driver->node),
|
|
"vtcon%i", con_driver->node);
|
|
|
|
if (IS_ERR(con_driver->dev)) {
|
|
printk(KERN_WARNING "Unable to create device for %s; "
|
|
"errno = %ld\n", con_driver->desc,
|
|
PTR_ERR(con_driver->dev));
|
|
con_driver->dev = NULL;
|
|
} else {
|
|
vtconsole_init_device(con_driver);
|
|
}
|
|
|
|
err:
|
|
release_console_sem();
|
|
module_put(owner);
|
|
return retval;
|
|
}
|
|
EXPORT_SYMBOL(register_con_driver);
|
|
|
|
/**
|
|
* unregister_con_driver - unregister console driver from console layer
|
|
* @csw: console driver
|
|
*
|
|
* DESCRIPTION: All drivers that registers to the console layer must
|
|
* call this function upon exit, or if the console driver is in a state
|
|
* where it won't be able to handle console services, such as the
|
|
* framebuffer console without loaded framebuffer drivers.
|
|
*
|
|
* The driver must unbind first prior to unregistration.
|
|
*/
|
|
int unregister_con_driver(const struct consw *csw)
|
|
{
|
|
int i, retval = -ENODEV;
|
|
|
|
acquire_console_sem();
|
|
|
|
/* cannot unregister a bound driver */
|
|
if (con_is_bound(csw))
|
|
goto err;
|
|
|
|
for (i = 0; i < MAX_NR_CON_DRIVER; i++) {
|
|
struct con_driver *con_driver = ®istered_con_driver[i];
|
|
|
|
if (con_driver->con == csw &&
|
|
con_driver->flag & CON_DRIVER_FLAG_MODULE) {
|
|
vtconsole_deinit_device(con_driver);
|
|
device_destroy(vtconsole_class,
|
|
MKDEV(0, con_driver->node));
|
|
con_driver->con = NULL;
|
|
con_driver->desc = NULL;
|
|
con_driver->dev = NULL;
|
|
con_driver->node = 0;
|
|
con_driver->flag = 0;
|
|
con_driver->first = 0;
|
|
con_driver->last = 0;
|
|
retval = 0;
|
|
break;
|
|
}
|
|
}
|
|
err:
|
|
release_console_sem();
|
|
return retval;
|
|
}
|
|
EXPORT_SYMBOL(unregister_con_driver);
|
|
|
|
/*
|
|
* If we support more console drivers, this function is used
|
|
* when a driver wants to take over some existing consoles
|
|
* and become default driver for newly opened ones.
|
|
*
|
|
* take_over_console is basically a register followed by unbind
|
|
*/
|
|
int take_over_console(const struct consw *csw, int first, int last, int deflt)
|
|
{
|
|
int err;
|
|
|
|
err = register_con_driver(csw, first, last);
|
|
|
|
if (!err)
|
|
bind_con_driver(csw, first, last, deflt);
|
|
|
|
return err;
|
|
}
|
|
|
|
/*
|
|
* give_up_console is a wrapper to unregister_con_driver. It will only
|
|
* work if driver is fully unbound.
|
|
*/
|
|
void give_up_console(const struct consw *csw)
|
|
{
|
|
unregister_con_driver(csw);
|
|
}
|
|
|
|
static int __init vtconsole_class_init(void)
|
|
{
|
|
int i;
|
|
|
|
vtconsole_class = class_create(THIS_MODULE, "vtconsole");
|
|
if (IS_ERR(vtconsole_class)) {
|
|
printk(KERN_WARNING "Unable to create vt console class; "
|
|
"errno = %ld\n", PTR_ERR(vtconsole_class));
|
|
vtconsole_class = NULL;
|
|
}
|
|
|
|
/* Add system drivers to sysfs */
|
|
for (i = 0; i < MAX_NR_CON_DRIVER; i++) {
|
|
struct con_driver *con = ®istered_con_driver[i];
|
|
|
|
if (con->con && !con->dev) {
|
|
con->dev = device_create(vtconsole_class, NULL,
|
|
MKDEV(0, con->node),
|
|
"vtcon%i", con->node);
|
|
|
|
if (IS_ERR(con->dev)) {
|
|
printk(KERN_WARNING "Unable to create "
|
|
"device for %s; errno = %ld\n",
|
|
con->desc, PTR_ERR(con->dev));
|
|
con->dev = NULL;
|
|
} else {
|
|
vtconsole_init_device(con);
|
|
}
|
|
}
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
postcore_initcall(vtconsole_class_init);
|
|
|
|
#endif
|
|
|
|
/*
|
|
* Screen blanking
|
|
*/
|
|
|
|
static int set_vesa_blanking(char __user *p)
|
|
{
|
|
unsigned int mode;
|
|
|
|
if (get_user(mode, p + 1))
|
|
return -EFAULT;
|
|
|
|
vesa_blank_mode = (mode < 4) ? mode : 0;
|
|
return 0;
|
|
}
|
|
|
|
void do_blank_screen(int entering_gfx)
|
|
{
|
|
struct vc_data *vc = vc_cons[fg_console].d;
|
|
int i;
|
|
|
|
WARN_CONSOLE_UNLOCKED();
|
|
|
|
if (console_blanked) {
|
|
if (blank_state == blank_vesa_wait) {
|
|
blank_state = blank_off;
|
|
vc->vc_sw->con_blank(vc, vesa_blank_mode + 1, 0);
|
|
}
|
|
return;
|
|
}
|
|
if (blank_state != blank_normal_wait)
|
|
return;
|
|
blank_state = blank_off;
|
|
|
|
/* entering graphics mode? */
|
|
if (entering_gfx) {
|
|
hide_cursor(vc);
|
|
save_screen(vc);
|
|
vc->vc_sw->con_blank(vc, -1, 1);
|
|
console_blanked = fg_console + 1;
|
|
set_origin(vc);
|
|
return;
|
|
}
|
|
|
|
/* don't blank graphics */
|
|
if (vc->vc_mode != KD_TEXT) {
|
|
console_blanked = fg_console + 1;
|
|
return;
|
|
}
|
|
|
|
hide_cursor(vc);
|
|
del_timer_sync(&console_timer);
|
|
blank_timer_expired = 0;
|
|
|
|
save_screen(vc);
|
|
/* In case we need to reset origin, blanking hook returns 1 */
|
|
i = vc->vc_sw->con_blank(vc, vesa_off_interval ? 1 : (vesa_blank_mode + 1), 0);
|
|
console_blanked = fg_console + 1;
|
|
if (i)
|
|
set_origin(vc);
|
|
|
|
if (console_blank_hook && console_blank_hook(1))
|
|
return;
|
|
|
|
if (vesa_off_interval && vesa_blank_mode) {
|
|
blank_state = blank_vesa_wait;
|
|
mod_timer(&console_timer, jiffies + vesa_off_interval);
|
|
}
|
|
}
|
|
EXPORT_SYMBOL(do_blank_screen);
|
|
|
|
/*
|
|
* Called by timer as well as from vt_console_driver
|
|
*/
|
|
void do_unblank_screen(int leaving_gfx)
|
|
{
|
|
struct vc_data *vc;
|
|
|
|
/* This should now always be called from a "sane" (read: can schedule)
|
|
* context for the sake of the low level drivers, except in the special
|
|
* case of oops_in_progress
|
|
*/
|
|
if (!oops_in_progress)
|
|
might_sleep();
|
|
|
|
WARN_CONSOLE_UNLOCKED();
|
|
|
|
ignore_poke = 0;
|
|
if (!console_blanked)
|
|
return;
|
|
if (!vc_cons_allocated(fg_console)) {
|
|
/* impossible */
|
|
printk("unblank_screen: tty %d not allocated ??\n", fg_console+1);
|
|
return;
|
|
}
|
|
vc = vc_cons[fg_console].d;
|
|
if (vc->vc_mode != KD_TEXT)
|
|
return; /* but leave console_blanked != 0 */
|
|
|
|
if (blankinterval) {
|
|
mod_timer(&console_timer, jiffies + blankinterval);
|
|
blank_state = blank_normal_wait;
|
|
}
|
|
|
|
console_blanked = 0;
|
|
if (vc->vc_sw->con_blank(vc, 0, leaving_gfx))
|
|
/* Low-level driver cannot restore -> do it ourselves */
|
|
update_screen(vc);
|
|
if (console_blank_hook)
|
|
console_blank_hook(0);
|
|
set_palette(vc);
|
|
set_cursor(vc);
|
|
}
|
|
EXPORT_SYMBOL(do_unblank_screen);
|
|
|
|
/*
|
|
* This is called by the outside world to cause a forced unblank, mostly for
|
|
* oopses. Currently, I just call do_unblank_screen(0), but we could eventually
|
|
* call it with 1 as an argument and so force a mode restore... that may kill
|
|
* X or at least garbage the screen but would also make the Oops visible...
|
|
*/
|
|
void unblank_screen(void)
|
|
{
|
|
do_unblank_screen(0);
|
|
}
|
|
|
|
/*
|
|
* We defer the timer blanking to work queue so it can take the console mutex
|
|
* (console operations can still happen at irq time, but only from printk which
|
|
* has the console mutex. Not perfect yet, but better than no locking
|
|
*/
|
|
static void blank_screen_t(unsigned long dummy)
|
|
{
|
|
if (unlikely(!keventd_up())) {
|
|
mod_timer(&console_timer, jiffies + blankinterval);
|
|
return;
|
|
}
|
|
blank_timer_expired = 1;
|
|
schedule_work(&console_work);
|
|
}
|
|
|
|
void poke_blanked_console(void)
|
|
{
|
|
WARN_CONSOLE_UNLOCKED();
|
|
|
|
/* Add this so we quickly catch whoever might call us in a non
|
|
* safe context. Nowadays, unblank_screen() isn't to be called in
|
|
* atomic contexts and is allowed to schedule (with the special case
|
|
* of oops_in_progress, but that isn't of any concern for this
|
|
* function. --BenH.
|
|
*/
|
|
might_sleep();
|
|
|
|
/* This isn't perfectly race free, but a race here would be mostly harmless,
|
|
* at worse, we'll do a spurrious blank and it's unlikely
|
|
*/
|
|
del_timer(&console_timer);
|
|
blank_timer_expired = 0;
|
|
|
|
if (ignore_poke || !vc_cons[fg_console].d || vc_cons[fg_console].d->vc_mode == KD_GRAPHICS)
|
|
return;
|
|
if (console_blanked)
|
|
unblank_screen();
|
|
else if (blankinterval) {
|
|
mod_timer(&console_timer, jiffies + blankinterval);
|
|
blank_state = blank_normal_wait;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Palettes
|
|
*/
|
|
|
|
static void set_palette(struct vc_data *vc)
|
|
{
|
|
WARN_CONSOLE_UNLOCKED();
|
|
|
|
if (vc->vc_mode != KD_GRAPHICS)
|
|
vc->vc_sw->con_set_palette(vc, color_table);
|
|
}
|
|
|
|
static int set_get_cmap(unsigned char __user *arg, int set)
|
|
{
|
|
int i, j, k;
|
|
|
|
WARN_CONSOLE_UNLOCKED();
|
|
|
|
for (i = 0; i < 16; i++)
|
|
if (set) {
|
|
get_user(default_red[i], arg++);
|
|
get_user(default_grn[i], arg++);
|
|
get_user(default_blu[i], arg++);
|
|
} else {
|
|
put_user(default_red[i], arg++);
|
|
put_user(default_grn[i], arg++);
|
|
put_user(default_blu[i], arg++);
|
|
}
|
|
if (set) {
|
|
for (i = 0; i < MAX_NR_CONSOLES; i++)
|
|
if (vc_cons_allocated(i)) {
|
|
for (j = k = 0; j < 16; j++) {
|
|
vc_cons[i].d->vc_palette[k++] = default_red[j];
|
|
vc_cons[i].d->vc_palette[k++] = default_grn[j];
|
|
vc_cons[i].d->vc_palette[k++] = default_blu[j];
|
|
}
|
|
set_palette(vc_cons[i].d);
|
|
}
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* Load palette into the DAC registers. arg points to a colour
|
|
* map, 3 bytes per colour, 16 colours, range from 0 to 255.
|
|
*/
|
|
|
|
int con_set_cmap(unsigned char __user *arg)
|
|
{
|
|
int rc;
|
|
|
|
acquire_console_sem();
|
|
rc = set_get_cmap (arg,1);
|
|
release_console_sem();
|
|
|
|
return rc;
|
|
}
|
|
|
|
int con_get_cmap(unsigned char __user *arg)
|
|
{
|
|
int rc;
|
|
|
|
acquire_console_sem();
|
|
rc = set_get_cmap (arg,0);
|
|
release_console_sem();
|
|
|
|
return rc;
|
|
}
|
|
|
|
void reset_palette(struct vc_data *vc)
|
|
{
|
|
int j, k;
|
|
for (j=k=0; j<16; j++) {
|
|
vc->vc_palette[k++] = default_red[j];
|
|
vc->vc_palette[k++] = default_grn[j];
|
|
vc->vc_palette[k++] = default_blu[j];
|
|
}
|
|
set_palette(vc);
|
|
}
|
|
|
|
/*
|
|
* Font switching
|
|
*
|
|
* Currently we only support fonts up to 32 pixels wide, at a maximum height
|
|
* of 32 pixels. Userspace fontdata is stored with 32 bytes (shorts/ints,
|
|
* depending on width) reserved for each character which is kinda wasty, but
|
|
* this is done in order to maintain compatibility with the EGA/VGA fonts. It
|
|
* is upto the actual low-level console-driver convert data into its favorite
|
|
* format (maybe we should add a `fontoffset' field to the `display'
|
|
* structure so we won't have to convert the fontdata all the time.
|
|
* /Jes
|
|
*/
|
|
|
|
#define max_font_size 65536
|
|
|
|
static int con_font_get(struct vc_data *vc, struct console_font_op *op)
|
|
{
|
|
struct console_font font;
|
|
int rc = -EINVAL;
|
|
int c;
|
|
|
|
if (vc->vc_mode != KD_TEXT)
|
|
return -EINVAL;
|
|
|
|
if (op->data) {
|
|
font.data = kmalloc(max_font_size, GFP_KERNEL);
|
|
if (!font.data)
|
|
return -ENOMEM;
|
|
} else
|
|
font.data = NULL;
|
|
|
|
acquire_console_sem();
|
|
if (vc->vc_sw->con_font_get)
|
|
rc = vc->vc_sw->con_font_get(vc, &font);
|
|
else
|
|
rc = -ENOSYS;
|
|
release_console_sem();
|
|
|
|
if (rc)
|
|
goto out;
|
|
|
|
c = (font.width+7)/8 * 32 * font.charcount;
|
|
|
|
if (op->data && font.charcount > op->charcount)
|
|
rc = -ENOSPC;
|
|
if (!(op->flags & KD_FONT_FLAG_OLD)) {
|
|
if (font.width > op->width || font.height > op->height)
|
|
rc = -ENOSPC;
|
|
} else {
|
|
if (font.width != 8)
|
|
rc = -EIO;
|
|
else if ((op->height && font.height > op->height) ||
|
|
font.height > 32)
|
|
rc = -ENOSPC;
|
|
}
|
|
if (rc)
|
|
goto out;
|
|
|
|
op->height = font.height;
|
|
op->width = font.width;
|
|
op->charcount = font.charcount;
|
|
|
|
if (op->data && copy_to_user(op->data, font.data, c))
|
|
rc = -EFAULT;
|
|
|
|
out:
|
|
kfree(font.data);
|
|
return rc;
|
|
}
|
|
|
|
static int con_font_set(struct vc_data *vc, struct console_font_op *op)
|
|
{
|
|
struct console_font font;
|
|
int rc = -EINVAL;
|
|
int size;
|
|
|
|
if (vc->vc_mode != KD_TEXT)
|
|
return -EINVAL;
|
|
if (!op->data)
|
|
return -EINVAL;
|
|
if (op->charcount > 512)
|
|
return -EINVAL;
|
|
if (!op->height) { /* Need to guess font height [compat] */
|
|
int h, i;
|
|
u8 __user *charmap = op->data;
|
|
u8 tmp;
|
|
|
|
/* If from KDFONTOP ioctl, don't allow things which can be done in userland,
|
|
so that we can get rid of this soon */
|
|
if (!(op->flags & KD_FONT_FLAG_OLD))
|
|
return -EINVAL;
|
|
for (h = 32; h > 0; h--)
|
|
for (i = 0; i < op->charcount; i++) {
|
|
if (get_user(tmp, &charmap[32*i+h-1]))
|
|
return -EFAULT;
|
|
if (tmp)
|
|
goto nonzero;
|
|
}
|
|
return -EINVAL;
|
|
nonzero:
|
|
op->height = h;
|
|
}
|
|
if (op->width <= 0 || op->width > 32 || op->height > 32)
|
|
return -EINVAL;
|
|
size = (op->width+7)/8 * 32 * op->charcount;
|
|
if (size > max_font_size)
|
|
return -ENOSPC;
|
|
font.charcount = op->charcount;
|
|
font.height = op->height;
|
|
font.width = op->width;
|
|
font.data = kmalloc(size, GFP_KERNEL);
|
|
if (!font.data)
|
|
return -ENOMEM;
|
|
if (copy_from_user(font.data, op->data, size)) {
|
|
kfree(font.data);
|
|
return -EFAULT;
|
|
}
|
|
acquire_console_sem();
|
|
if (vc->vc_sw->con_font_set)
|
|
rc = vc->vc_sw->con_font_set(vc, &font, op->flags);
|
|
else
|
|
rc = -ENOSYS;
|
|
release_console_sem();
|
|
kfree(font.data);
|
|
return rc;
|
|
}
|
|
|
|
static int con_font_default(struct vc_data *vc, struct console_font_op *op)
|
|
{
|
|
struct console_font font = {.width = op->width, .height = op->height};
|
|
char name[MAX_FONT_NAME];
|
|
char *s = name;
|
|
int rc;
|
|
|
|
if (vc->vc_mode != KD_TEXT)
|
|
return -EINVAL;
|
|
|
|
if (!op->data)
|
|
s = NULL;
|
|
else if (strncpy_from_user(name, op->data, MAX_FONT_NAME - 1) < 0)
|
|
return -EFAULT;
|
|
else
|
|
name[MAX_FONT_NAME - 1] = 0;
|
|
|
|
acquire_console_sem();
|
|
if (vc->vc_sw->con_font_default)
|
|
rc = vc->vc_sw->con_font_default(vc, &font, s);
|
|
else
|
|
rc = -ENOSYS;
|
|
release_console_sem();
|
|
if (!rc) {
|
|
op->width = font.width;
|
|
op->height = font.height;
|
|
}
|
|
return rc;
|
|
}
|
|
|
|
static int con_font_copy(struct vc_data *vc, struct console_font_op *op)
|
|
{
|
|
int con = op->height;
|
|
int rc;
|
|
|
|
if (vc->vc_mode != KD_TEXT)
|
|
return -EINVAL;
|
|
|
|
acquire_console_sem();
|
|
if (!vc->vc_sw->con_font_copy)
|
|
rc = -ENOSYS;
|
|
else if (con < 0 || !vc_cons_allocated(con))
|
|
rc = -ENOTTY;
|
|
else if (con == vc->vc_num) /* nothing to do */
|
|
rc = 0;
|
|
else
|
|
rc = vc->vc_sw->con_font_copy(vc, con);
|
|
release_console_sem();
|
|
return rc;
|
|
}
|
|
|
|
int con_font_op(struct vc_data *vc, struct console_font_op *op)
|
|
{
|
|
switch (op->op) {
|
|
case KD_FONT_OP_SET:
|
|
return con_font_set(vc, op);
|
|
case KD_FONT_OP_GET:
|
|
return con_font_get(vc, op);
|
|
case KD_FONT_OP_SET_DEFAULT:
|
|
return con_font_default(vc, op);
|
|
case KD_FONT_OP_COPY:
|
|
return con_font_copy(vc, op);
|
|
}
|
|
return -ENOSYS;
|
|
}
|
|
|
|
/*
|
|
* Interface exported to selection and vcs.
|
|
*/
|
|
|
|
/* used by selection */
|
|
u16 screen_glyph(struct vc_data *vc, int offset)
|
|
{
|
|
u16 w = scr_readw(screenpos(vc, offset, 1));
|
|
u16 c = w & 0xff;
|
|
|
|
if (w & vc->vc_hi_font_mask)
|
|
c |= 0x100;
|
|
return c;
|
|
}
|
|
|
|
/* used by vcs - note the word offset */
|
|
unsigned short *screen_pos(struct vc_data *vc, int w_offset, int viewed)
|
|
{
|
|
return screenpos(vc, 2 * w_offset, viewed);
|
|
}
|
|
|
|
void getconsxy(struct vc_data *vc, unsigned char *p)
|
|
{
|
|
p[0] = vc->vc_x;
|
|
p[1] = vc->vc_y;
|
|
}
|
|
|
|
void putconsxy(struct vc_data *vc, unsigned char *p)
|
|
{
|
|
hide_cursor(vc);
|
|
gotoxy(vc, p[0], p[1]);
|
|
set_cursor(vc);
|
|
}
|
|
|
|
u16 vcs_scr_readw(struct vc_data *vc, const u16 *org)
|
|
{
|
|
if ((unsigned long)org == vc->vc_pos && softcursor_original != -1)
|
|
return softcursor_original;
|
|
return scr_readw(org);
|
|
}
|
|
|
|
void vcs_scr_writew(struct vc_data *vc, u16 val, u16 *org)
|
|
{
|
|
scr_writew(val, org);
|
|
if ((unsigned long)org == vc->vc_pos) {
|
|
softcursor_original = -1;
|
|
add_softcursor(vc);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Visible symbols for modules
|
|
*/
|
|
|
|
EXPORT_SYMBOL(color_table);
|
|
EXPORT_SYMBOL(default_red);
|
|
EXPORT_SYMBOL(default_grn);
|
|
EXPORT_SYMBOL(default_blu);
|
|
EXPORT_SYMBOL(update_region);
|
|
EXPORT_SYMBOL(redraw_screen);
|
|
EXPORT_SYMBOL(vc_resize);
|
|
EXPORT_SYMBOL(vc_lock_resize);
|
|
EXPORT_SYMBOL(fg_console);
|
|
EXPORT_SYMBOL(console_blank_hook);
|
|
EXPORT_SYMBOL(console_blanked);
|
|
EXPORT_SYMBOL(vc_cons);
|
|
#ifndef VT_SINGLE_DRIVER
|
|
EXPORT_SYMBOL(take_over_console);
|
|
EXPORT_SYMBOL(give_up_console);
|
|
#endif
|