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/*
* linux/drivers/char/console.c
*
* Copyright (C) 1991, 1992 Linus Torvalds
*/
/*
* Hopefully this will be a rather complete VT102 implementation.
*
* Beeping thanks to John T Kohl.
*
* Virtual Consoles, Screen Blanking, Screen Dumping, Color, Graphics
* Chars, and VT100 enhancements by Peter MacDonald.
*
* Copy and paste function by Andrew Haylett,
* some enhancements by Alessandro Rubini.
*
* Code to check for different video-cards mostly by Galen Hunt,
* <g-hunt@ee.utah.edu>
*
* Rudimentary ISO 10646/Unicode/UTF-8 character set support by
* Markus Kuhn, <mskuhn@immd4.informatik.uni-erlangen.de>.
*
* Dynamic allocation of consoles, aeb@cwi.nl, May 1994
* Resizing of consoles, aeb, 940926
*
* Code for xterm like mouse click reporting by Peter Orbaek 20-Jul-94
* <poe@daimi.aau.dk>
*
* User-defined bell sound, new setterm control sequences and printk
* redirection by Martin Mares <mj@k332.feld.cvut.cz> 19-Nov-95
*
* APM screenblank bug fixed Takashi Manabe <manabe@roy.dsl.tutics.tut.jp>
*
* Merge with the abstract console driver by Geert Uytterhoeven
* <geert@linux-m68k.org>, Jan 1997.
*
* Original m68k console driver modifications by
*
* - Arno Griffioen <arno@usn.nl>
* - David Carter <carter@cs.bris.ac.uk>
*
* Note that the abstract console driver allows all consoles to be of
* potentially different sizes, so the following variables depend on the
* current console (currcons):
*
* - video_num_columns
* - video_num_lines
* - video_size_row
* - can_do_color
*
* The abstract console driver provides a generic interface for a text
* console. It supports VGA text mode, frame buffer based graphical consoles
* and special graphics processors that are only accessible through some
* registers (e.g. a TMS340x0 GSP).
*
* The interface to the hardware is specified using a special structure
* (struct consw) which contains function pointers to console operations
* (see <linux/console.h> for more information).
*
* Support for changeable cursor shape
* by Pavel Machek <pavel@atrey.karlin.mff.cuni.cz>, August 1997
*
* Ported to i386 and con_scrolldelta fixed
* by Emmanuel Marty <core@ggi-project.org>, April 1998
*
* Resurrected character buffers in videoram plus lots of other trickery
* by Martin Mares <mj@atrey.karlin.mff.cuni.cz>, July 1998
*
* Removed old-style timers, introduced console_timer, made timer
* deletion SMP-safe. 17Jun00, Andrew Morton <andrewm@uow.edu.au>
*
* Removed console_lock, enabled interrupts across all console operations
* 13 March 2001, Andrew Morton
*/
#include <linux/module.h>
#include <linux/sched.h>
#include <linux/tty.h>
#include <linux/tty_flip.h>
#include <linux/kernel.h>
#include <linux/string.h>
#include <linux/errno.h>
#include <linux/kd.h>
#include <linux/slab.h>
#include <linux/major.h>
#include <linux/mm.h>
#include <linux/console.h>
#include <linux/init.h>
#include <linux/devfs_fs_kernel.h>
#include <linux/vt_kern.h>
#include <linux/selection.h>
#include <linux/console_struct.h>
#include <linux/kbd_kern.h>
#include <linux/consolemap.h>
#include <linux/timer.h>
#include <linux/interrupt.h>
#include <linux/config.h>
#include <linux/version.h>
#include <linux/tqueue.h>
#include <linux/bootmem.h>
#include <linux/pm.h>
#include <linux/smp_lock.h>
#include <asm/io.h>
#include <asm/system.h>
#include <asm/uaccess.h>
#include <asm/bitops.h>
#include "console_macros.h"
const struct consw *conswitchp;
/* A bitmap for codes <32. A bit of 1 indicates that the code
* corresponding to that bit number invokes some special action
* (such as cursor movement) and should not be displayed as a
* glyph unless the disp_ctrl mode is explicitly enabled.
*/
#define CTRL_ACTION 0x0d00ff81
#define CTRL_ALWAYS 0x0800f501 /* Cannot be overridden by disp_ctrl */
/*
* Here is the default bell parameters: 750HZ, 1/8th of a second
*/
#define DEFAULT_BELL_PITCH 750
#define DEFAULT_BELL_DURATION (HZ/8)
extern void vcs_make_devfs (unsigned int index, int unregister);
#ifndef MIN
#define MIN(a,b) ((a) < (b) ? (a) : (b))
#endif
static struct tty_struct *console_table[MAX_NR_CONSOLES];
static struct termios *console_termios[MAX_NR_CONSOLES];
static struct termios *console_termios_locked[MAX_NR_CONSOLES];
struct vc vc_cons [MAX_NR_CONSOLES];
#ifndef VT_SINGLE_DRIVER
static const struct consw *con_driver_map[MAX_NR_CONSOLES];
#endif
static int con_open(struct tty_struct *, struct file *);
static void vc_init(unsigned int console, unsigned int rows,
unsigned int cols, int do_clear);
static void blank_screen(unsigned long dummy);
static void gotoxy(int currcons, int new_x, int new_y);
static void save_cur(int currcons);
static void reset_terminal(int currcons, int do_clear);
static void con_flush_chars(struct tty_struct *tty);
static void set_vesa_blanking(unsigned long arg);
static void set_cursor(int currcons);
static void hide_cursor(int currcons);
static void unblank_screen_t(unsigned long dummy);
static void console_callback(void *ignored);
static int printable; /* Is console ready for printing? */
int do_poke_blanked_console;
int console_blanked;
static int vesa_blank_mode; /* 0:none 1:suspendV 2:suspendH 3:powerdown */
static int blankinterval = 10*60*HZ;
static int vesa_off_interval;
static struct tq_struct console_callback_tq = {
routine: console_callback,
};
/*
* fg_console is the current virtual console,
* last_console is the last used one,
* want_console is the console we want to switch to,
* kmsg_redirect is the console for kernel messages,
*/
int fg_console;
int last_console;
int want_console = -1;
int kmsg_redirect;
/*
* For each existing display, we have a pointer to console currently visible
* on that display, allowing consoles other than fg_console to be refreshed
* appropriately. Unless the low-level driver supplies its own display_fg
* variable, we use this one for the "master display".
*/
static struct vc_data *master_display_fg;
/*
* Unfortunately, we need to delay tty echo when we're currently writing to the
* console since the code is (and always was) not re-entrant, so we schedule
* all flip requests to process context with schedule-task() and run it from
* console_callback().
*/
/*
* For the same reason, we defer scrollback to the console callback.
*/
static int scrollback_delta;
/*
* Hook so that the power management routines can (un)blank
* the console on our behalf.
*/
int (*console_blank_hook)(int);
static struct timer_list console_timer;
/*
* Low-Level Functions
*/
#define IS_FG (currcons == fg_console)
#define IS_VISIBLE CON_IS_VISIBLE(vc_cons[currcons].d)
#ifdef VT_BUF_VRAM_ONLY
#define DO_UPDATE 0
#else
#define DO_UPDATE IS_VISIBLE
#endif
static int pm_con_request(struct pm_dev *dev, pm_request_t rqst, void *data);
static struct pm_dev *pm_con;
static inline unsigned short *screenpos(int currcons, int offset, int viewed)
{
unsigned short *p;
if (!viewed)
p = (unsigned short *)(origin + offset);
else if (!sw->con_screen_pos)
p = (unsigned short *)(visible_origin + offset);
else
p = sw->con_screen_pos(vc_cons[currcons].d, offset);
return p;
}
static inline void scrolldelta(int lines)
{
scrollback_delta += lines;
schedule_console_callback();
}
void schedule_console_callback(void)
{
schedule_task(&console_callback_tq);
}
static void scrup(int currcons, unsigned int t, unsigned int b, int nr)
{
unsigned short *d, *s;
if (t+nr >= b)
nr = b - t - 1;
if (b > video_num_lines || t >= b || nr < 1)
return;
if (IS_VISIBLE && sw->con_scroll(vc_cons[currcons].d, t, b, SM_UP, nr))
return;
d = (unsigned short *) (origin+video_size_row*t);
s = (unsigned short *) (origin+video_size_row*(t+nr));
scr_memcpyw(d, s, (b-t-nr) * video_size_row);
scr_memsetw(d + (b-t-nr) * video_num_columns, video_erase_char, video_size_row*nr);
}
static void
scrdown(int currcons, unsigned int t, unsigned int b, int nr)
{
unsigned short *s;
unsigned int step;
if (t+nr >= b)
nr = b - t - 1;
if (b > video_num_lines || t >= b || nr < 1)
return;
if (IS_VISIBLE && sw->con_scroll(vc_cons[currcons].d, t, b, SM_DOWN, nr))
return;
s = (unsigned short *) (origin+video_size_row*t);
step = video_num_columns * nr;
scr_memmovew(s + step, s, (b-t-nr)*video_size_row);
scr_memsetw(s, video_erase_char, 2*step);
}
static void do_update_region(int currcons, unsigned long start, int count)
{
#ifndef VT_BUF_VRAM_ONLY
unsigned int xx, yy, offset;
u16 *p;
p = (u16 *) start;
if (!sw->con_getxy) {
offset = (start - origin) / 2;
xx = offset % video_num_columns;
yy = offset / video_num_columns;
} else {
int nxx, nyy;
start = sw->con_getxy(vc_cons[currcons].d, start, &nxx, &nyy);
xx = nxx; yy = nyy;
}
for(;;) {
u16 attrib = scr_readw(p) & 0xff00;
int startx = xx;
u16 *q = p;
while (xx < video_num_columns && count) {
if (attrib != (scr_readw(p) & 0xff00)) {
if (p > q)
sw->con_putcs(vc_cons[currcons].d, q, p-q, yy, startx);
startx = xx;
q = p;
attrib = scr_readw(p) & 0xff00;
}
p++;
xx++;
count--;
}
if (p > q)
sw->con_putcs(vc_cons[currcons].d, q, p-q, yy, startx);
if (!count)
break;
xx = 0;
yy++;
if (sw->con_getxy) {
p = (u16 *)start;
start = sw->con_getxy(vc_cons[currcons].d, start, NULL, NULL);
}
}
#endif
}
void update_region(int currcons, unsigned long start, int count)
{
if (DO_UPDATE) {
hide_cursor(currcons);
do_update_region(currcons, start, count);
set_cursor(currcons);
}
}
/* Structure of attributes is hardware-dependent */
static u8 build_attr(int currcons, u8 _color, u8 _intensity, u8 _blink, u8 _underline, u8 _reverse)
{
if (sw->con_build_attr)
return sw->con_build_attr(vc_cons[currcons].d, _color, _intensity, _blink, _underline, _reverse);
#ifndef VT_BUF_VRAM_ONLY
/*
* ++roman: I completely changed the attribute format for monochrome
* mode (!can_do_color). The formerly used MDA (monochrome display
* adapter) format didn't allow the combination of certain effects.
* Now the attribute is just a bit vector:
* Bit 0..1: intensity (0..2)
* Bit 2 : underline
* Bit 3 : reverse
* Bit 7 : blink
*/
{
u8 a = color;
if (!can_do_color)
return _intensity |
(_underline ? 4 : 0) |
(_reverse ? 8 : 0) |
(_blink ? 0x80 : 0);
if (_underline)
a = (a & 0xf0) | ulcolor;
else if (_intensity == 0)
a = (a & 0xf0) | halfcolor;
if (_reverse)
a = ((a) & 0x88) | ((((a) >> 4) | ((a) << 4)) & 0x77);
if (_blink)
a ^= 0x80;
if (_intensity == 2)
a ^= 0x08;
if (hi_font_mask == 0x100)
a <<= 1;
return a;
}
#else
return 0;
#endif
}
static void update_attr(int currcons)
{
attr = build_attr(currcons, color, intensity, blink, underline, reverse ^ decscnm);
video_erase_char = (build_attr(currcons, color, 1, blink, 0, decscnm) << 8) | ' ';
}
/* Note: inverting the screen twice should revert to the original state */
void invert_screen(int currcons, int offset, int count, int viewed)
{
unsigned short *p;
count /= 2;
p = screenpos(currcons, offset, viewed);
if (sw->con_invert_region)
sw->con_invert_region(vc_cons[currcons].d, p, count);
#ifndef VT_BUF_VRAM_ONLY
else {
u16 *q = p;
int cnt = count;
u16 a;
if (!can_do_color) {
while (cnt--) {
a = scr_readw(q);
a ^= 0x0800;
scr_writew(a, q);
q++;
}
} else if (hi_font_mask == 0x100) {
while (cnt--) {
a = scr_readw(q);
a = ((a) & 0x11ff) | (((a) & 0xe000) >> 4) | (((a) & 0x0e00) << 4);
scr_writew(a, q);
q++;
}
} else {
while (cnt--) {
a = scr_readw(q);
a = ((a) & 0x88ff) | (((a) & 0x7000) >> 4) | (((a) & 0x0700) << 4);
scr_writew(a, q);
q++;
}
}
}
#endif
if (DO_UPDATE)
do_update_region(currcons, (unsigned long) p, count);
}
/* used by selection: complement pointer position */
void complement_pos(int currcons, int offset)
{
static unsigned short *p;
static unsigned short old;
static unsigned short oldx, oldy;
if (p) {
scr_writew(old, p);
if (DO_UPDATE)
sw->con_putc(vc_cons[currcons].d, old, oldy, oldx);
}
if (offset == -1)
p = NULL;
else {
unsigned short new;
p = screenpos(currcons, offset, 1);
old = scr_readw(p);
new = old ^ complement_mask;
scr_writew(new, p);
if (DO_UPDATE) {
oldx = (offset >> 1) % video_num_columns;
oldy = (offset >> 1) / video_num_columns;
sw->con_putc(vc_cons[currcons].d, new, oldy, oldx);
}
}
}
static void insert_char(int currcons, unsigned int nr)
{
unsigned short *p, *q = (unsigned short *) pos;
p = q + video_num_columns - nr - x;
while (--p >= q)
scr_writew(scr_readw(p), p + nr);
scr_memsetw(q, video_erase_char, nr*2);
need_wrap = 0;
if (DO_UPDATE) {
unsigned short oldattr = attr;
sw->con_bmove(vc_cons[currcons].d,y,x,y,x+nr,1,
video_num_columns-x-nr);
attr = video_erase_char >> 8;
while (nr--)
sw->con_putc(vc_cons[currcons].d,
video_erase_char,y,x+nr);
attr = oldattr;
}
}
static void delete_char(int currcons, unsigned int nr)
{
unsigned int i = x;
unsigned short *p = (unsigned short *) pos;
while (++i <= video_num_columns - nr) {
scr_writew(scr_readw(p+nr), p);
p++;
}
scr_memsetw(p, video_erase_char, nr*2);
need_wrap = 0;
if (DO_UPDATE) {
unsigned short oldattr = attr;
sw->con_bmove(vc_cons[currcons].d, y, x+nr, y, x, 1,
video_num_columns-x-nr);
attr = video_erase_char >> 8;
while (nr--)
sw->con_putc(vc_cons[currcons].d,
video_erase_char, y,
video_num_columns-1-nr);
attr = oldattr;
}
}
static int softcursor_original;
static void add_softcursor(int currcons)
{
int i = scr_readw((u16 *) pos);
u32 type = 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 *) pos);
if (DO_UPDATE)
sw->con_putc(vc_cons[currcons].d, i, y, x);
}
static void hide_cursor(int currcons)
{
if (currcons == sel_cons)
clear_selection();
if (softcursor_original != -1) {
scr_writew(softcursor_original,(u16 *) pos);
if (DO_UPDATE)
sw->con_putc(vc_cons[currcons].d, softcursor_original, y, x);
softcursor_original = -1;
}
sw->con_cursor(vc_cons[currcons].d,CM_ERASE);
}
static void set_cursor(int currcons)
{
if (!IS_FG || console_blanked || vcmode == KD_GRAPHICS)
return;
if (deccm) {
if (currcons == sel_cons)
clear_selection();
add_softcursor(currcons);
if ((cursor_type & 0x0f) != 1)
sw->con_cursor(vc_cons[currcons].d,CM_DRAW);
} else
hide_cursor(currcons);
}
static void set_origin(int currcons)
{
if (!IS_VISIBLE ||
!sw->con_set_origin ||
!sw->con_set_origin(vc_cons[currcons].d))
origin = (unsigned long) screenbuf;
visible_origin = origin;
scr_end = origin + screenbuf_size;
pos = origin + video_size_row*y + 2*x;
}
static inline void save_screen(int currcons)
{
if (sw->con_save_screen)
sw->con_save_screen(vc_cons[currcons].d);
}
/*
* Redrawing of screen
*/
void redraw_screen(int new_console, int is_switch)
{
int redraw = 1;
int currcons, old_console;
if (!vc_cons_allocated(new_console)) {
/* strange ... */
/* printk("redraw_screen: tty %d not allocated ??\n", new_console+1); */
return;
}
if (is_switch) {
currcons = fg_console;
hide_cursor(currcons);
if (fg_console != new_console) {
struct vc_data **display = vc_cons[new_console].d->vc_display_fg;
old_console = (*display) ? (*display)->vc_num : fg_console;
*display = vc_cons[new_console].d;
fg_console = new_console;
currcons = old_console;
if (!IS_VISIBLE) {
save_screen(currcons);
set_origin(currcons);
}
currcons = new_console;
if (old_console == new_console)
redraw = 0;
}
} else {
currcons = new_console;
hide_cursor(currcons);
}
if (redraw) {
int update;
set_origin(currcons);
update = sw->con_switch(vc_cons[currcons].d);
set_palette(currcons);
if (update && vcmode != KD_GRAPHICS)
do_update_region(currcons, origin, screenbuf_size/2);
}
set_cursor(currcons);
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(int currcons, int init)
{
/* ++Geert: sw->con_init determines console size */
sw = conswitchp;
#ifndef VT_SINGLE_DRIVER
if (con_driver_map[currcons])
sw = con_driver_map[currcons];
#endif
cons_num = currcons;
display_fg = &master_display_fg;
vc_cons[currcons].d->vc_uni_pagedir_loc = &vc_cons[currcons].d->vc_uni_pagedir;
vc_cons[currcons].d->vc_uni_pagedir = 0;
hi_font_mask = 0;
complement_mask = 0;
can_do_color = 0;
sw->con_init(vc_cons[currcons].d, init);
if (!complement_mask)
complement_mask = can_do_color ? 0x7700 : 0x0800;
s_complement_mask = complement_mask;
video_size_row = video_num_columns<<1;
screenbuf_size = video_num_lines*video_size_row;
}
int vc_allocate(unsigned int currcons) /* return 0 on success */
{
if (currcons >= MAX_NR_CONSOLES)
return -ENXIO;
if (!vc_cons[currcons].d) {
long p, q;
/* 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 */
p = (long) kmalloc(structsize, GFP_KERNEL);
if (!p)
return -ENOMEM;
memset((void *)p, 0, structsize);
vc_cons[currcons].d = (struct vc_data *)p;
vt_cons[currcons] = (struct vt_struct *)(p+sizeof(struct vc_data));
visual_init(currcons, 1);
if (!*vc_cons[currcons].d->vc_uni_pagedir_loc)
con_set_default_unimap(currcons);
q = (long)kmalloc(screenbuf_size, GFP_KERNEL);
if (!q) {
kfree((char *) p);
vc_cons[currcons].d = NULL;
vt_cons[currcons] = NULL;
return -ENOMEM;
}
screenbuf = (unsigned short *) q;
kmalloced = 1;
vc_init(currcons, video_num_lines, video_num_columns, 1);
if (!pm_con) {
pm_con = pm_register(PM_SYS_DEV,
PM_SYS_VGA,
pm_con_request);
}
}
return 0;
}
/*
* 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]
*/
int vc_resize(unsigned int lines, unsigned int cols,
unsigned int first, unsigned int last)
{
unsigned int cc, ll, ss, sr, todo = 0;
unsigned int currcons = fg_console, i;
unsigned short *newscreens[MAX_NR_CONSOLES];
cc = (cols ? cols : video_num_columns);
ll = (lines ? lines : video_num_lines);
sr = cc << 1;
ss = sr * ll;
for (currcons = first; currcons <= last; currcons++) {
if (!vc_cons_allocated(currcons) ||
(cc == video_num_columns && ll == video_num_lines))
newscreens[currcons] = NULL;
else {
unsigned short *p = (unsigned short *) kmalloc(ss, GFP_USER);
if (!p) {
for (i = first; i < currcons; i++)
if (newscreens[i])
kfree(newscreens[i]);
return -ENOMEM;
}
newscreens[currcons] = p;
todo++;
}
}
if (!todo)
return 0;
for (currcons = first; currcons <= last; currcons++) {
unsigned int occ, oll, oss, osr;
unsigned long ol, nl, nlend, rlth, rrem;
if (!newscreens[currcons] || !vc_cons_allocated(currcons))
continue;
oll = video_num_lines;
occ = video_num_columns;
osr = video_size_row;
oss = screenbuf_size;
video_num_lines = ll;
video_num_columns = cc;
video_size_row = sr;
screenbuf_size = ss;
rlth = MIN(osr, sr);
rrem = sr - rlth;
ol = origin;
nl = (long) newscreens[currcons];
nlend = nl + ss;
if (ll < oll)
ol += (oll - ll) * osr;
update_attr(currcons);
while (ol < scr_end) {
scr_memcpyw((unsigned short *) nl, (unsigned short *) ol, rlth);
if (rrem)
scr_memsetw((void *)(nl + rlth), video_erase_char, rrem);
ol += osr;
nl += sr;
}
if (nlend > nl)
scr_memsetw((void *) nl, video_erase_char, nlend - nl);
if (kmalloced)
kfree(screenbuf);
screenbuf = newscreens[currcons];
kmalloced = 1;
screenbuf_size = ss;
set_origin(currcons);
/* do part of a reset_terminal() */
top = 0;
bottom = video_num_lines;
gotoxy(currcons, x, y);
save_cur(currcons);
if (console_table[currcons]) {
struct winsize ws, *cws = &console_table[currcons]->winsize;
memset(&ws, 0, sizeof(ws));
ws.ws_row = video_num_lines;
ws.ws_col = video_num_columns;
if ((ws.ws_row != cws->ws_row || ws.ws_col != cws->ws_col) &&
console_table[currcons]->pgrp > 0)
kill_pg(console_table[currcons]->pgrp, SIGWINCH, 1);
*cws = ws;
}
if (IS_VISIBLE)
update_screen(currcons);
}
return 0;
}
void vc_disallocate(unsigned int currcons)
{
acquire_console_sem();
if (vc_cons_allocated(currcons)) {
sw->con_deinit(vc_cons[currcons].d);
if (kmalloced)
kfree(screenbuf);
if (currcons >= MIN_NR_CONSOLES)
kfree(vc_cons[currcons].d);
vc_cons[currcons].d = NULL;
}
release_console_sem();
}
/*
* VT102 emulator
*/
#define set_kbd(x) set_vc_kbd_mode(kbd_table+currcons,x)
#define clr_kbd(x) clr_vc_kbd_mode(kbd_table+currcons,x)
#define is_kbd(x) vc_kbd_mode(kbd_table+currcons,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};
/*
* 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(int currcons, int new_x, int new_y)
{
int min_y, max_y;
if (new_x < 0)
x = 0;
else
if (new_x >= video_num_columns)
x = video_num_columns - 1;
else
x = new_x;
if (decom) {
min_y = top;
max_y = bottom;
} else {
min_y = 0;
max_y = video_num_lines;
}
if (new_y < min_y)
y = min_y;
else if (new_y >= max_y)
y = max_y - 1;
else
y = new_y;
pos = origin + y*video_size_row + (x<<1);
need_wrap = 0;
}
/* for absolute user moves, when decom is set */
static void gotoxay(int currcons, int new_x, int new_y)
{
gotoxy(currcons, new_x, decom ? (top+new_y) : new_y);
}
void scrollback(int lines)
{
int currcons = fg_console;
if (!lines)
lines = video_num_lines/2;
scrolldelta(-lines);
}
void scrollfront(int lines)
{
int currcons = fg_console;
if (!lines)
lines = video_num_lines/2;
scrolldelta(lines);
}
static void lf(int currcons)
{
/* don't scroll if above bottom of scrolling region, or
* if below scrolling region
*/
if (y+1 == bottom)
scrup(currcons,top,bottom,1);
else if (y < video_num_lines-1) {
y++;
pos += video_size_row;
}
need_wrap = 0;
}
static void ri(int currcons)
{
/* don't scroll if below top of scrolling region, or
* if above scrolling region
*/
if (y == top)
scrdown(currcons,top,bottom,1);
else if (y > 0) {
y--;
pos -= video_size_row;
}
need_wrap = 0;
}
static inline void cr(int currcons)
{
pos -= x<<1;
need_wrap = x = 0;
}
static inline void bs(int currcons)
{
if (x) {
pos -= 2;
x--;
need_wrap = 0;
}
}
static inline void del(int currcons)
{
/* ignored */
}
static void csi_J(int currcons, int vpar)
{
unsigned int count;
unsigned short * start;
switch (vpar) {
case 0: /* erase from cursor to end of display */
count = (scr_end-pos)>>1;
start = (unsigned short *) pos;
if (DO_UPDATE) {
/* do in two stages */
sw->con_clear(vc_cons[currcons].d, y, x, 1,
video_num_columns-x);
sw->con_clear(vc_cons[currcons].d, y+1, 0,
video_num_lines-y-1,
video_num_columns);
}
break;
case 1: /* erase from start to cursor */
count = ((pos-origin)>>1)+1;
start = (unsigned short *) origin;
if (DO_UPDATE) {
/* do in two stages */
sw->con_clear(vc_cons[currcons].d, 0, 0, y,
video_num_columns);
sw->con_clear(vc_cons[currcons].d, y, 0, 1,
x + 1);
}
break;
case 2: /* erase whole display */
count = video_num_columns * video_num_lines;
start = (unsigned short *) origin;
if (DO_UPDATE)
sw->con_clear(vc_cons[currcons].d, 0, 0,
video_num_lines,
video_num_columns);
break;
default:
return;
}
scr_memsetw(start, video_erase_char, 2*count);
need_wrap = 0;
}
static void csi_K(int currcons, int vpar)
{
unsigned int count;
unsigned short * start;
switch (vpar) {
case 0: /* erase from cursor to end of line */
count = video_num_columns-x;
start = (unsigned short *) pos;
if (DO_UPDATE)
sw->con_clear(vc_cons[currcons].d, y, x, 1,
video_num_columns-x);
break;
case 1: /* erase from start of line to cursor */
start = (unsigned short *) (pos - (x<<1));
count = x+1;
if (DO_UPDATE)
sw->con_clear(vc_cons[currcons].d, y, 0, 1,
x + 1);
break;
case 2: /* erase whole line */
start = (unsigned short *) (pos - (x<<1));
count = video_num_columns;
if (DO_UPDATE)
sw->con_clear(vc_cons[currcons].d, y, 0, 1,
video_num_columns);
break;
default:
return;
}
scr_memsetw(start, video_erase_char, 2 * count);
need_wrap = 0;
}
static void csi_X(int currcons, int vpar) /* erase the following vpar positions */
{ /* not vt100? */
int count;
if (!vpar)
vpar++;
count = (vpar > video_num_columns-x) ? (video_num_columns-x) : vpar;
scr_memsetw((unsigned short *) pos, video_erase_char, 2 * count);
if (DO_UPDATE)
sw->con_clear(vc_cons[currcons].d, y, x, 1, count);
need_wrap = 0;
}
static void default_attr(int currcons)
{
intensity = 1;
underline = 0;
reverse = 0;
blink = 0;
color = def_color;
}
/* console_sem is held */
static void csi_m(int currcons)
{
int i;
for (i=0;i<=npar;i++)
switch (par[i]) {
case 0: /* all attributes off */
default_attr(currcons);
break;
case 1:
intensity = 2;
break;
case 2:
intensity = 0;
break;
case 4:
underline = 1;
break;
case 5:
blink = 1;
break;
case 7:
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.
*/
translate = set_translate(charset == 0
? G0_charset
: G1_charset,currcons);
disp_ctrl = 0;
toggle_meta = 0;
break;
case 11: /* ANSI X3.64-1979 (SCO-ish?)
* Select first alternate font, lets
* chars < 32 be displayed as ROM chars.
*/
translate = set_translate(IBMPC_MAP,currcons);
disp_ctrl = 1;
toggle_meta = 0;
break;
case 12: /* ANSI X3.64-1979 (SCO-ish?)
* Select second alternate font, toggle
* high bit before displaying as ROM char.
*/
translate = set_translate(IBMPC_MAP,currcons);
disp_ctrl = 1;
toggle_meta = 1;
break;
case 21:
case 22:
intensity = 1;
break;
case 24:
underline = 0;
break;
case 25:
blink = 0;
break;
case 27:
reverse = 0;
break;
case 38: /* ANSI X3.64-1979 (SCO-ish?)
* Enables underscore, white foreground
* with white underscore (Linux - use
* default foreground).
*/
color = (def_color & 0x0f) | background;
underline = 1;
break;
case 39: /* ANSI X3.64-1979 (SCO-ish?)
* Disable underline option.
* Reset colour to default? It did this
* before...
*/
color = (def_color & 0x0f) | background;
underline = 0;
break;
case 49:
color = (def_color & 0xf0) | foreground;
break;
default:
if (par[i] >= 30 && par[i] <= 37)
color = color_table[par[i]-30]
| background;
else if (par[i] >= 40 && par[i] <= 47)
color = (color_table[par[i]-40]<<4)
| foreground;
break;
}
update_attr(currcons);
}
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(int currcons, struct tty_struct * tty)
{
char buf[40];
sprintf(buf, "\033[%d;%dR", y + (decom ? top+1 : 1), 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)
{
int currcons = fg_console;
return report_mouse;
}
/* console_sem is held */
static void set_mode(int currcons, int on_off)
{
int i;
for (i=0; i<=npar; i++)
if (ques) switch(par[i]) { /* DEC private modes set/reset */
case 1: /* Cursor keys send ^[Ox/^[[x */
if (on_off)
set_kbd(decckm);
else
clr_kbd(decckm);
break;
case 3: /* 80/132 mode switch unimplemented */
deccolm = on_off;
#if 0
(void) vc_resize(video_num_lines, deccolm ? 132 : 80);
/* this alone does not suffice; some user mode
utility has to change the hardware regs */
#endif
break;
case 5: /* Inverted screen on/off */
if (decscnm != on_off) {
decscnm = on_off;
invert_screen(currcons, 0, screenbuf_size, 0);
update_attr(currcons);
}
break;
case 6: /* Origin relative/absolute */
decom = on_off;
gotoxay(currcons,0,0);
break;
case 7: /* Autowrap on/off */
decawm = on_off;
break;
case 8: /* Autorepeat on/off */
if (on_off)
set_kbd(decarm);
else
clr_kbd(decarm);
break;
case 9:
report_mouse = on_off ? 1 : 0;
break;
case 25: /* Cursor on/off */
deccm = on_off;
break;
case 1000:
report_mouse = on_off ? 2 : 0;
break;
} else switch(par[i]) { /* ANSI modes set/reset */
case 3: /* Monitor (display ctrls) */
disp_ctrl = on_off;
break;
case 4: /* Insert Mode on/off */
decim = on_off;
break;
case 20: /* Lf, Enter == CrLf/Lf */
if (on_off)
set_kbd(lnm);
else
clr_kbd(lnm);
break;
}
}
/* console_sem is held */
static void setterm_command(int currcons)
{
switch(par[0]) {
case 1: /* set color for underline mode */
if (can_do_color && par[1] < 16) {
ulcolor = color_table[par[1]];
if (underline)
update_attr(currcons);
}
break;
case 2: /* set color for half intensity mode */
if (can_do_color && par[1] < 16) {
halfcolor = color_table[par[1]];
if (intensity == 0)
update_attr(currcons);
}
break;
case 8: /* store colors as defaults */
def_color = attr;
if (hi_font_mask == 0x100)
def_color >>= 1;
default_attr(currcons);
update_attr(currcons);
break;
case 9: /* set blanking interval */
blankinterval = ((par[1] < 60) ? par[1] : 60) * 60 * HZ;
poke_blanked_console();
break;
case 10: /* set bell frequency in Hz */
if (npar >= 1)
bell_pitch = par[1];
else
bell_pitch = DEFAULT_BELL_PITCH;
break;
case 11: /* set bell duration in msec */
if (npar >= 1)
bell_duration = (par[1] < 2000) ?
par[1]*HZ/1000 : 0;
else
bell_duration = DEFAULT_BELL_DURATION;
break;
case 12: /* bring specified console to the front */
if (par[1] >= 1 && vc_cons_allocated(par[1]-1))
set_console(par[1] - 1);
break;
case 13: /* unblank the screen */
poke_blanked_console();
break;
case 14: /* set vesa powerdown interval */
vesa_off_interval = ((par[1] < 60) ? par[1] : 60) * 60 * HZ;
break;
}
}
/* console_sem is held */
static void csi_at(int currcons, unsigned int nr)
{
if (nr > video_num_columns - x)
nr = video_num_columns - x;
else if (!nr)
nr = 1;
insert_char(currcons, nr);
}
/* console_sem is held */
static void csi_L(int currcons, unsigned int nr)
{
if (nr > video_num_lines - y)
nr = video_num_lines - y;
else if (!nr)
nr = 1;
scrdown(currcons,y,bottom,nr);
need_wrap = 0;
}
/* console_sem is held */
static void csi_P(int currcons, unsigned int nr)
{
if (nr > video_num_columns - x)
nr = video_num_columns - x;
else if (!nr)
nr = 1;
delete_char(currcons, nr);
}
/* console_sem is held */
static void csi_M(int currcons, unsigned int nr)
{
if (nr > video_num_lines - y)
nr = video_num_lines - y;
else if (!nr)
nr=1;
scrup(currcons,y,bottom,nr);
need_wrap = 0;
}
/* console_sem is held (except via vc_init->reset_terminal */
static void save_cur(int currcons)
{
saved_x = x;
saved_y = y;
s_intensity = intensity;
s_underline = underline;
s_blink = blink;
s_reverse = reverse;
s_charset = charset;
s_color = color;
saved_G0 = G0_charset;
saved_G1 = G1_charset;
}
/* console_sem is held */
static void restore_cur(int currcons)
{
gotoxy(currcons,saved_x,saved_y);
intensity = s_intensity;
underline = s_underline;
blink = s_blink;
reverse = s_reverse;
charset = s_charset;
color = s_color;
G0_charset = saved_G0;
G1_charset = saved_G1;
translate = set_translate(charset ? G1_charset : G0_charset,currcons);
update_attr(currcons);
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(int currcons, int do_clear)
{
top = 0;
bottom = video_num_lines;
vc_state = ESnormal;
ques = 0;
translate = set_translate(LAT1_MAP,currcons);
G0_charset = LAT1_MAP;
G1_charset = GRAF_MAP;
charset = 0;
need_wrap = 0;
report_mouse = 0;
utf = 0;
utf_count = 0;
disp_ctrl = 0;
toggle_meta = 0;
decscnm = 0;
decom = 0;
decawm = 1;
deccm = 1;
decim = 0;
set_kbd(decarm);
clr_kbd(decckm);
clr_kbd(kbdapplic);
clr_kbd(lnm);
kbd_table[currcons].lockstate = 0;
kbd_table[currcons].slockstate = 0;
kbd_table[currcons].ledmode = LED_SHOW_FLAGS;
kbd_table[currcons].ledflagstate = kbd_table[currcons].default_ledflagstate;
set_leds();
cursor_type = CUR_DEFAULT;
complement_mask = s_complement_mask;
default_attr(currcons);
update_attr(currcons);
tab_stop[0] = 0x01010100;
tab_stop[1] =
tab_stop[2] =
tab_stop[3] =
tab_stop[4] = 0x01010101;
bell_pitch = DEFAULT_BELL_PITCH;
bell_duration = DEFAULT_BELL_DURATION;
gotoxy(currcons,0,0);
save_cur(currcons);
if (do_clear)
csi_J(currcons,2);
}
/* console_sem is held */
static void do_con_trol(struct tty_struct *tty, unsigned int currcons, int c)
{
/*
* Control characters can be used in the _middle_
* of an escape sequence.
*/
switch (c) {
case 0:
return;
case 7:
if (bell_duration)
kd_mksound(bell_pitch, bell_duration);
return;
case 8:
bs(currcons);
return;
case 9:
pos -= (x << 1);
while (x < video_num_columns - 1) {
x++;
if (tab_stop[x >> 5] & (1 << (x & 31)))
break;
}
pos += (x << 1);
return;
case 10: case 11: case 12:
lf(currcons);
if (!is_kbd(lnm))
return;
case 13:
cr(currcons);
return;
case 14:
charset = 1;
translate = set_translate(G1_charset,currcons);
disp_ctrl = 1;
return;
case 15:
charset = 0;
translate = set_translate(G0_charset,currcons);
disp_ctrl = 0;
return;
case 24: case 26:
vc_state = ESnormal;
return;
case 27:
vc_state = ESesc;
return;
case 127:
del(currcons);
return;
case 128+27:
vc_state = ESsquare;
return;
}
switch(vc_state) {
case ESesc:
vc_state = ESnormal;
switch (c) {
case '[':
vc_state = ESsquare;
return;
case ']':
vc_state = ESnonstd;
return;
case '%':
vc_state = ESpercent;
return;
case 'E':
cr(currcons);
lf(currcons);
return;
case 'M':
ri(currcons);
return;
case 'D':
lf(currcons);
return;
case 'H':
tab_stop[x >> 5] |= (1 << (x & 31));
return;
case 'Z':
respond_ID(tty);
return;
case '7':
save_cur(currcons);
return;
case '8':
restore_cur(currcons);
return;
case '(':
vc_state = ESsetG0;
return;
case ')':
vc_state = ESsetG1;
return;
case '#':
vc_state = EShash;
return;
case 'c':
reset_terminal(currcons,1);
return;
case '>': /* Numeric keypad */
clr_kbd(kbdapplic);
return;
case '=': /* Appl. keypad */
set_kbd(kbdapplic);
return;
}
return;
case ESnonstd:
if (c=='P') { /* palette escape sequence */
for (npar=0; npar<NPAR; npar++)
par[npar] = 0 ;
npar = 0 ;
vc_state = ESpalette;
return;
} else if (c=='R') { /* reset palette */
reset_palette(currcons);
vc_state = ESnormal;
} else
vc_state = ESnormal;
return;
case ESpalette:
if ( (c>='0'&&c<='9') || (c>='A'&&c<='F') || (c>='a'&&c<='f') ) {
par[npar++] = (c>'9' ? (c&0xDF)-'A'+10 : c-'0') ;
if (npar==7) {
int i = par[0]*3, j = 1;
palette[i] = 16*par[j++];
palette[i++] += par[j++];
palette[i] = 16*par[j++];
palette[i++] += par[j++];
palette[i] = 16*par[j++];
palette[i] += par[j];
set_palette(currcons);
vc_state = ESnormal;
}
} else
vc_state = ESnormal;
return;
case ESsquare:
for(npar = 0 ; npar < NPAR ; npar++)
par[npar] = 0;
npar = 0;
vc_state = ESgetpars;
if (c == '[') { /* Function key */
vc_state=ESfunckey;
return;
}
ques = (c=='?');
if (ques)
return;
case ESgetpars:
if (c==';' && npar<NPAR-1) {
npar++;
return;
} else if (c>='0' && c<='9') {
par[npar] *= 10;
par[npar] += c-'0';
return;
} else vc_state=ESgotpars;
case ESgotpars:
vc_state = ESnormal;
switch(c) {
case 'h':
set_mode(currcons,1);
return;
case 'l':
set_mode(currcons,0);
return;
case 'c':
if (ques) {
if (par[0])
cursor_type = par[0] | (par[1]<<8) | (par[2]<<16);
else
cursor_type = CUR_DEFAULT;
return;
}
break;
case 'm':
if (ques) {
clear_selection();
if (par[0])
complement_mask = par[0]<<8 | par[1];
else
complement_mask = s_complement_mask;
return;
}
break;
case 'n':
if (!ques) {
if (par[0] == 5)
status_report(tty);
else if (par[0] == 6)
cursor_report(currcons,tty);
}
return;
}
if (ques) {
ques = 0;
return;
}
switch(c) {
case 'G': case '`':
if (par[0]) par[0]--;
gotoxy(currcons,par[0],y);
return;
case 'A':
if (!par[0]) par[0]++;
gotoxy(currcons,x,y-par[0]);
return;
case 'B': case 'e':
if (!par[0]) par[0]++;
gotoxy(currcons,x,y+par[0]);
return;
case 'C': case 'a':
if (!par[0]) par[0]++;
gotoxy(currcons,x+par[0],y);
return;
case 'D':
if (!par[0]) par[0]++;
gotoxy(currcons,x-par[0],y);
return;
case 'E':
if (!par[0]) par[0]++;
gotoxy(currcons,0,y+par[0]);
return;
case 'F':
if (!par[0]) par[0]++;
gotoxy(currcons,0,y-par[0]);
return;
case 'd':
if (par[0]) par[0]--;
gotoxay(currcons,x,par[0]);
return;
case 'H': case 'f':
if (par[0]) par[0]--;
if (par[1]) par[1]--;
gotoxay(currcons,par[1],par[0]);
return;
case 'J':
csi_J(currcons,par[0]);
return;
case 'K':
csi_K(currcons,par[0]);
return;
case 'L':
csi_L(currcons,par[0]);
return;
case 'M':
csi_M(currcons,par[0]);
return;
case 'P':
csi_P(currcons,par[0]);
return;
case 'c':
if (!par[0])
respond_ID(tty);
return;
case 'g':
if (!par[0])
tab_stop[x >> 5] &= ~(1 << (x & 31));
else if (par[0] == 3) {
tab_stop[0] =
tab_stop[1] =
tab_stop[2] =
tab_stop[3] =
tab_stop[4] = 0;
}
return;
case 'm':
csi_m(currcons);
return;
case 'q': /* DECLL - but only 3 leds */
/* map 0,1,2,3 to 0,1,2,4 */
if (par[0] < 4)
setledstate(kbd_table + currcons,
(par[0] < 3) ? par[0] : 4);
return;
case 'r':
if (!par[0])
par[0]++;
if (!par[1])
par[1] = video_num_lines;
/* Minimum allowed region is 2 lines */
if (par[0] < par[1] &&
par[1] <= video_num_lines) {
top=par[0]-1;
bottom=par[1];
gotoxay(currcons,0,0);
}
return;
case 's':
save_cur(currcons);
return;
case 'u':
restore_cur(currcons);
return;
case 'X':
csi_X(currcons, par[0]);
return;
case '@':
csi_at(currcons,par[0]);
return;
case ']': /* setterm functions */
setterm_command(currcons);
return;
}
return;
case ESpercent:
vc_state = ESnormal;
switch (c) {
case '@': /* defined in ISO 2022 */
utf = 0;
return;
case 'G': /* prelim official escape code */
case '8': /* retained for compatibility */
utf = 1;
return;
}
return;
case ESfunckey:
vc_state = ESnormal;
return;
case EShash:
vc_state = ESnormal;
if (c == '8') {
/* DEC screen alignment test. kludge :-) */
video_erase_char =
(video_erase_char & 0xff00) | 'E';
csi_J(currcons, 2);
video_erase_char =
(video_erase_char & 0xff00) | ' ';
do_update_region(currcons, origin, screenbuf_size/2);
}
return;
case ESsetG0:
if (c == '0')
G0_charset = GRAF_MAP;
else if (c == 'B')
G0_charset = LAT1_MAP;
else if (c == 'U')
G0_charset = IBMPC_MAP;
else if (c == 'K')
G0_charset = USER_MAP;
if (charset == 0)
translate = set_translate(G0_charset,currcons);
vc_state = ESnormal;
return;
case ESsetG1:
if (c == '0')
G1_charset = GRAF_MAP;
else if (c == 'B')
G1_charset = LAT1_MAP;
else if (c == 'U')
G1_charset = IBMPC_MAP;
else if (c == 'K')
G1_charset = USER_MAP;
if (charset == 1)
translate = set_translate(G1_charset,currcons);
vc_state = ESnormal;
return;
default:
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[PAGE_SIZE];
#define CON_BUF_SIZE PAGE_SIZE
DECLARE_MUTEX(con_buf_sem);
/* acquires console_sem */
static int do_con_write(struct tty_struct * tty, int from_user,
const unsigned char *buf, int count)
{
#ifdef VT_BUF_VRAM_ONLY
#define FLUSH do { } while(0);
#else
#define FLUSH if (draw_x >= 0) { \
sw->con_putcs(vc_cons[currcons].d, (u16 *)draw_from, (u16 *)draw_to-(u16 *)draw_from, 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 vt_struct *vt = (struct vt_struct *)tty->driver_data;
u16 himask, charmask;
const unsigned char *orig_buf = NULL;
int orig_count;
if (in_interrupt())
return count;
currcons = vt->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);
}
return 0;
}
orig_buf = buf;
orig_count = count;
if (from_user) {
down(&con_buf_sem);
again:
if (count > CON_BUF_SIZE)
count = CON_BUF_SIZE;
console_conditional_schedule();
if (copy_from_user(con_buf, buf, count)) {
n = 0; /* ?? are error codes legal here ?? */
goto out;
}
buf = con_buf;
}
/* At this point 'buf' is guarenteed to be a kernel buffer
* and therefore no access to userspace (and therefore sleeping)
* will be needed. The con_buf_sem serializes all tty based
* console rendering and vcs write/read operations. We hold
* the console spinlock during the entire write.
*/
acquire_console_sem();
himask = hi_font_mask;
charmask = himask ? 0x1ff : 0xff;
/* undraw cursor first */
if (IS_FG)
hide_cursor(currcons);
while (!tty->stopped && count) {
c = *buf;
buf++;
n++;
count--;
if (utf) {
/* Combine UTF-8 into Unicode */
/* Incomplete characters silently ignored */
if(c > 0x7f) {
if (utf_count > 0 && (c & 0xc0) == 0x80) {
utf_char = (utf_char << 6) | (c & 0x3f);
utf_count--;
if (utf_count == 0)
tc = c = utf_char;
else continue;
} else {
if ((c & 0xe0) == 0xc0) {
utf_count = 1;
utf_char = (c & 0x1f);
} else if ((c & 0xf0) == 0xe0) {
utf_count = 2;
utf_char = (c & 0x0f);
} else if ((c & 0xf8) == 0xf0) {
utf_count = 3;
utf_char = (c & 0x07);
} else if ((c & 0xfc) == 0xf8) {
utf_count = 4;
utf_char = (c & 0x03);
} else if ((c & 0xfe) == 0xfc) {
utf_count = 5;
utf_char = (c & 0x01);
} else
utf_count = 0;
continue;
}
} else {
tc = c;
utf_count = 0;
}
} else { /* no utf */
tc = translate[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 ||
(!utf && !(((disp_ctrl ? CTRL_ALWAYS
: CTRL_ACTION) >> c) & 1)))
&& (c != 127 || disp_ctrl)
&& (c != 128+27);
if (vc_state == ESnormal && ok) {
/* Now try to find out how to display it */
tc = conv_uni_to_pc(vc_cons[currcons].d, tc);
if ( tc == -4 ) {
/* If we got -4 (not found) then see if we have
defined a replacement character (U+FFFD) */
tc = conv_uni_to_pc(vc_cons[currcons].d, 0xfffd);
/* One reason for the -4 can be that we just
did a clear_unimap();
try at least to show something. */
if (tc == -4)
tc = c;
} else if ( tc == -3 ) {
/* Bad hash table -- hope for the best */
tc = c;
}
if (tc & ~charmask)
continue; /* Conversion failed */
if (need_wrap || decim)
FLUSH
if (need_wrap) {
cr(currcons);
lf(currcons);
}
if (decim)
insert_char(currcons, 1);
scr_writew(himask ?
((attr << 8) & ~himask) + ((tc & 0x100) ? himask : 0) + (tc & 0xff) :
(attr << 8) + tc,
(u16 *) pos);
if (DO_UPDATE && draw_x < 0) {
draw_x = x;
draw_from = pos;
}
if (x == video_num_columns - 1) {
need_wrap = decawm;
draw_to = pos+2;
} else {
x++;
draw_to = (pos+=2);
}
continue;
}
FLUSH
do_con_trol(tty, currcons, c);
}
FLUSH
console_conditional_schedule();
release_console_sem();
out:
if (from_user) {
/* If the user requested something larger than
* the CON_BUF_SIZE, and the tty is not stopped,
* keep going.
*/
if ((orig_count > CON_BUF_SIZE) && !tty->stopped) {
orig_count -= CON_BUF_SIZE;
orig_buf += CON_BUF_SIZE;
count = orig_count;
buf = orig_buf;
goto again;
}
up(&con_buf_sem);
}
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(void *ignored)
{
acquire_console_sem();
if (want_console >= 0) {
if (want_console != fg_console && vc_cons_allocated(want_console)) {
hide_cursor(fg_console);
change_console(want_console);
/* 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) {
int currcons = fg_console;
clear_selection();
if (vcmode == KD_TEXT)
sw->con_scrolldelta(vc_cons[currcons].d, scrollback_delta);
scrollback_delta = 0;
}
release_console_sem();
}
void set_console(int nr)
{
want_console = nr;
schedule_console_callback();
}
#ifdef CONFIG_VT_CONSOLE
/*
* Console on virtual terminal
*
* The console must be locked when we get here.
*/
void vt_console_print(struct console *co, const char * b, unsigned count)
{
int currcons = fg_console;
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;
pm_access(pm_con);
if (kmsg_redirect && vc_cons_allocated(kmsg_redirect - 1))
currcons = kmsg_redirect - 1;
/* read `x' only after setting currecons properly (otherwise
the `x' macro will read the x of the foreground console). */
myx = x;
if (!vc_cons_allocated(currcons)) {
/* impossible */
/* printk("vt_console_print: tty %d not allocated ??\n", currcons+1); */
goto quit;
}
if (vcmode != KD_TEXT)
goto quit;
/* undraw cursor first */
if (IS_FG)
hide_cursor(currcons);
start = (ushort *)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 || need_wrap) {
if (cnt > 0) {
if (IS_VISIBLE)
sw->con_putcs(vc_cons[currcons].d, start, cnt, y, x);
x += cnt;
if (need_wrap)
x--;
cnt = 0;
}
if (c == 8) { /* backspace */
bs(currcons);
start = (ushort *)pos;
myx = x;
continue;
}
if (c != 13)
lf(currcons);
cr(currcons);
start = (ushort *)pos;
myx = x;
if (c == 10 || c == 13)
continue;
}
scr_writew((attr << 8) + c, (unsigned short *) pos);
cnt++;
if (myx == video_num_columns - 1) {
need_wrap = 1;
continue;
}
pos+=2;
myx++;
}
if (cnt > 0) {
if (IS_VISIBLE)
sw->con_putcs(vc_cons[currcons].d, start, cnt, y, x);
x += cnt;
if (x == video_num_columns) {
x--;
need_wrap = 1;
}
}
set_cursor(currcons);
if (!oops_in_progress)
poke_blanked_console();
quit:
clear_bit(0, &printing);
}
static kdev_t vt_console_device(struct console *c)
{
return MKDEV(TTY_MAJOR, c->index ? c->index : fg_console + 1);
}
struct console vt_console_driver = {
name: "tty",
write: vt_console_print,
device: vt_console_device,
wait_key: keyboard_wait_for_keypress,
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;
int ret;
if (tty->driver.type != TTY_DRIVER_TYPE_CONSOLE)
return -EINVAL;
if (current->tty != tty && !capable(CAP_SYS_ADMIN))
return -EPERM;
if (get_user(type, (char *)arg))
return -EFAULT;
ret = 0;
switch (type)
{
case 2:
acquire_console_sem();
ret = set_selection(arg, tty, 1);
release_console_sem();
break;
case 3:
ret = paste_selection(tty);
break;
case 4:
unblank_screen();
break;
case 5:
ret = sel_loadlut(arg);
break;
case 6:
/*
* 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, (char *) arg);
break;
case 7:
data = mouse_reporting();
ret = __put_user(data, (char *) arg);
break;
case 10:
set_vesa_blanking(arg);
break;;
case 11: /* set kmsg redirect */
if (!capable(CAP_SYS_ADMIN)) {
ret = -EPERM;
} else {
if (get_user(data, (char *)arg+1))
ret = -EFAULT;
else
kmsg_redirect = data;
}
break;
case 12: /* get fg_console */
ret = fg_console;
break;
default:
ret = -EINVAL;
break;
}
return ret;
}
/*
* /dev/ttyN handling
*/
static int con_write(struct tty_struct * tty, int from_user,
const unsigned char *buf, int count)
{
int retval;
pm_access(pm_con);
retval = do_con_write(tty, from_user, 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 */
pm_access(pm_con);
do_con_write(tty, 0, &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 vt_struct *vt = (struct vt_struct *) tty->driver_data;
wake_up_interruptible(&vt->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 = MINOR(tty->device) - (tty->driver.minor_start);
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 = MINOR(tty->device) - (tty->driver.minor_start);
if (!vc_cons_allocated(console_num))
return;
clr_vc_kbd_led(kbd_table + console_num, VC_SCROLLOCK);
set_leds();
}
/*
* we can race here against con_close, so we grab the bkl
* and check the pointer before calling set_cursor
*/
static void con_flush_chars(struct tty_struct *tty)
{
struct vt_struct *vt;
if (in_interrupt()) /* from flush_to_ldisc */
return;
pm_access(pm_con);
lock_kernel();
acquire_console_sem();
vt = (struct vt_struct *)tty->driver_data;
if (vt)
set_cursor(vt->vc_num);
release_console_sem();
unlock_kernel();
}
/*
* Allocate the console screen memory.
*/
static int con_open(struct tty_struct *tty, struct file * filp)
{
unsigned int currcons;
int i;
currcons = MINOR(tty->device) - tty->driver.minor_start;
i = vc_allocate(currcons);
if (i)
return i;
vt_cons[currcons]->vc_num = currcons;
tty->driver_data = vt_cons[currcons];
if (!tty->winsize.ws_row && !tty->winsize.ws_col) {
tty->winsize.ws_row = video_num_lines;
tty->winsize.ws_col = video_num_columns;
}
if (tty->count == 1)
vcs_make_devfs (currcons, 0);
return 0;
}
static void con_close(struct tty_struct *tty, struct file * filp)
{
if (!tty)
return;
if (tty->count != 1) return;
vcs_make_devfs (MINOR (tty->device) - tty->driver.minor_start, 1);
tty->driver_data = 0;
}
static void vc_init(unsigned int currcons, unsigned int rows, unsigned int cols, int do_clear)
{
int j, k ;
video_num_columns = cols;
video_num_lines = rows;
video_size_row = cols<<1;
screenbuf_size = video_num_lines * video_size_row;
set_origin(currcons);
pos = origin;
reset_vc(currcons);
for (j=k=0; j<16; j++) {
vc_cons[currcons].d->vc_palette[k++] = default_red[j] ;
vc_cons[currcons].d->vc_palette[k++] = default_grn[j] ;
vc_cons[currcons].d->vc_palette[k++] = default_blu[j] ;
}
def_color = 0x07; /* white */
ulcolor = 0x0f; /* bold white */
halfcolor = 0x08; /* grey */
init_waitqueue_head(&vt_cons[currcons]->paste_wait);
reset_terminal(currcons, 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.
*/
struct tty_driver console_driver;
static int console_refcount;
void __init con_init(void)
{
const char *display_desc = NULL;
unsigned int currcons = 0;
if (conswitchp)
display_desc = conswitchp->con_startup();
if (!display_desc) {
fg_console = 0;
return;
}
memset(&console_driver, 0, sizeof(struct tty_driver));
console_driver.magic = TTY_DRIVER_MAGIC;
console_driver.name = "vc/%d";
console_driver.name_base = 1;
console_driver.major = TTY_MAJOR;
console_driver.minor_start = 1;
console_driver.num = MAX_NR_CONSOLES;
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;
/* Tell tty_register_driver() to skip consoles because they are
* registered before kmalloc() is ready. We'll patch them in later.
* See comments at console_init(); see also con_init_devfs().
*/
console_driver.flags |= TTY_DRIVER_NO_DEVFS;
console_driver.refcount = &console_refcount;
console_driver.table = console_table;
console_driver.termios = console_termios;
console_driver.termios_locked = console_termios_locked;
console_driver.open = con_open;
console_driver.close = con_close;
console_driver.write = con_write;
console_driver.write_room = con_write_room;
console_driver.put_char = con_put_char;
console_driver.flush_chars = con_flush_chars;
console_driver.chars_in_buffer = con_chars_in_buffer;
console_driver.ioctl = vt_ioctl;
console_driver.stop = con_stop;
console_driver.start = con_start;
console_driver.throttle = con_throttle;
console_driver.unthrottle = con_unthrottle;
if (tty_register_driver(&console_driver))
panic("Couldn't register console driver\n");
init_timer(&console_timer);
console_timer.function = blank_screen;
if (blankinterval) {
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 = (struct vc_data *)
alloc_bootmem(sizeof(struct vc_data));
vt_cons[currcons] = (struct vt_struct *)
alloc_bootmem(sizeof(struct vt_struct));
visual_init(currcons, 1);
screenbuf = (unsigned short *) alloc_bootmem(screenbuf_size);
kmalloced = 0;
vc_init(currcons, video_num_lines, video_num_columns,
currcons || !sw->con_save_screen);
}
currcons = fg_console = 0;
master_display_fg = vc_cons[currcons].d;
set_origin(currcons);
save_screen(currcons);
gotoxy(currcons,x,y);
csi_J(currcons, 0);
update_screen(fg_console);
printk("Console: %s %s %dx%d",
can_do_color ? "colour" : "mono",
display_desc, video_num_columns, video_num_lines);
printable = 1;
printk("\n");
#ifdef CONFIG_VT_CONSOLE
register_console(&vt_console_driver);
#endif
}
#ifndef VT_SINGLE_DRIVER
static void clear_buffer_attributes(int currcons)
{
unsigned short *p = (unsigned short *) origin;
int count = screenbuf_size/2;
int mask = hi_font_mask | 0xff;
for (; count > 0; count--, p++) {
scr_writew((scr_readw(p)&mask) | (video_erase_char&~mask), p);
}
}
/*
* 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.
*/
void take_over_console(const struct consw *csw, int first, int last, int deflt)
{
int i, j = -1;
const char *desc;
desc = csw->con_startup();
if (!desc) return;
if (deflt)
conswitchp = csw;
for (i = first; i <= last; i++) {
int old_was_color;
int currcons = i;
con_driver_map[i] = csw;
if (!vc_cons[i].d || !vc_cons[i].d->vc_sw)
continue;
j = i;
if (IS_VISIBLE)
save_screen(i);
old_was_color = vc_cons[i].d->vc_can_do_color;
vc_cons[i].d->vc_sw->con_deinit(vc_cons[i].d);
visual_init(i, 0);
update_attr(i);
/* 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_cons[i].d->vc_can_do_color)
clear_buffer_attributes(i);
if (IS_VISIBLE)
update_screen(i);
}
printk("Console: switching ");
if (!deflt)
printk("consoles %d-%d ", first+1, last+1);
if (j >= 0)
printk("to %s %s %dx%d\n",
vc_cons[j].d->vc_can_do_color ? "colour" : "mono",
desc, vc_cons[j].d->vc_cols, vc_cons[j].d->vc_rows);
else
printk("to %s\n", desc);
}
void give_up_console(const struct consw *csw)
{
int i;
for(i = 0; i < MAX_NR_CONSOLES; i++)
if (con_driver_map[i] == csw)
con_driver_map[i] = NULL;
}
#endif
/*
* Screen blanking
*/
static void set_vesa_blanking(unsigned long arg)
{
char *argp = (char *)arg + 1;
unsigned int mode;
if (get_user(mode, argp) == 0)
vesa_blank_mode = (mode < 4) ? mode : 0;
}
/* We can't register the console with devfs during con_init(), because it
* is called before kmalloc() works. This function is called later to
* do the registration.
*/
void __init con_init_devfs (void)
{
int i;
for (i = 0; i < console_driver.num; i++)
tty_register_devfs (&console_driver, DEVFS_FL_AOPEN_NOTIFY,
console_driver.minor_start + i);
}
/*
* This is called by a timer handler
*/
static void vesa_powerdown(void)
{
struct vc_data *c = vc_cons[fg_console].d;
/*
* Power down if currently suspended (1 or 2),
* suspend if currently blanked (0),
* else do nothing (i.e. already powered down (3)).
* Called only if powerdown features are allowed.
*/
switch (vesa_blank_mode) {
case VESA_NO_BLANKING:
c->vc_sw->con_blank(c, VESA_VSYNC_SUSPEND+1);
break;
case VESA_VSYNC_SUSPEND:
case VESA_HSYNC_SUSPEND:
c->vc_sw->con_blank(c, VESA_POWERDOWN+1);
break;
}
}
/*
* This is a timer handler
*/
static void vesa_powerdown_screen(unsigned long dummy)
{
console_timer.function = unblank_screen_t;
vesa_powerdown();
}
static void timer_do_blank_screen(int entering_gfx, int from_timer_handler)
{
int currcons = fg_console;
int i;
if (console_blanked)
return;
/* entering graphics mode? */
if (entering_gfx) {
hide_cursor(currcons);
save_screen(currcons);
sw->con_blank(vc_cons[currcons].d, -1);
console_blanked = fg_console + 1;
set_origin(currcons);
return;
}
/* don't blank graphics */
if (vcmode != KD_TEXT) {
console_blanked = fg_console + 1;
return;
}
hide_cursor(currcons);
if (!from_timer_handler)
del_timer_sync(&console_timer);
if (vesa_off_interval) {
console_timer.function = vesa_powerdown_screen;
mod_timer(&console_timer, jiffies + vesa_off_interval);
} else {
if (!from_timer_handler)
del_timer_sync(&console_timer);
console_timer.function = unblank_screen_t;
}
save_screen(currcons);
/* In case we need to reset origin, blanking hook returns 1 */
i = sw->con_blank(vc_cons[currcons].d, 1);
console_blanked = fg_console + 1;
if (i)
set_origin(currcons);
if (console_blank_hook && console_blank_hook(1))
return;
if (vesa_blank_mode)
sw->con_blank(vc_cons[currcons].d, vesa_blank_mode + 1);
}
void do_blank_screen(int entering_gfx)
{
timer_do_blank_screen(entering_gfx, 0);
}
/*
* This is a timer handler
*/
static void unblank_screen_t(unsigned long dummy)
{
unblank_screen();
}
/*
* Called by timer as well as from vt_console_driver
*/
void unblank_screen(void)
{
int currcons;
if (!console_blanked)
return;
if (!vc_cons_allocated(fg_console)) {
/* impossible */
printk("unblank_screen: tty %d not allocated ??\n", fg_console+1);
return;
}
currcons = fg_console;
if (vcmode != KD_TEXT)
return; /* but leave console_blanked != 0 */
console_timer.function = blank_screen;
if (blankinterval) {
mod_timer(&console_timer, jiffies + blankinterval);
}
console_blanked = 0;
if (console_blank_hook)
console_blank_hook(0);
set_palette(currcons);
if (sw->con_blank(vc_cons[currcons].d, 0))
/* Low-level driver cannot restore -> do it ourselves */
update_screen(fg_console);
set_cursor(fg_console);
}
/*
* This is both a user-level callable and a timer handler
*/
static void blank_screen(unsigned long dummy)
{
timer_do_blank_screen(0, 1);
}
void poke_blanked_console(void)
{
del_timer(&console_timer);
if (!vt_cons[fg_console] || vt_cons[fg_console]->vc_mode == KD_GRAPHICS)
return;
if (console_blanked) {
console_timer.function = unblank_screen_t;
mod_timer(&console_timer, jiffies); /* Now */
} else if (blankinterval) {
mod_timer(&console_timer, jiffies + blankinterval);
}
}
/*
* Palettes
*/
void set_palette(int currcons)
{
if (vcmode != KD_GRAPHICS)
sw->con_set_palette(vc_cons[currcons].d, color_table);
}
static int set_get_cmap(unsigned char *arg, int set)
{
int i, j, k;
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(i);
}
}
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 *arg)
{
return set_get_cmap (arg,1);
}
int con_get_cmap(unsigned char *arg)
{
return set_get_cmap (arg,0);
}
void reset_palette(int currcons)
{
int j, k;
for (j=k=0; j<16; j++) {
palette[k++] = default_red[j];
palette[k++] = default_grn[j];
palette[k++] = default_blu[j];
}
set_palette(currcons);
}
/*
* 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 wont have to convert the fontdata all the time.
* /Jes
*/
#define max_font_size 65536
int con_font_op(int currcons, struct console_font_op *op)
{
int rc = -EINVAL;
int size = max_font_size, set;
u8 *temp = NULL;
struct console_font_op old_op;
if (vt_cons[currcons]->vc_mode != KD_TEXT)
goto quit;
memcpy(&old_op, op, sizeof(old_op));
if (op->op == KD_FONT_OP_SET) {
if (!op->data)
return -EINVAL;
if (op->charcount > 512)
goto quit;
if (!op->height) { /* Need to guess font height [compat] */
int h, i;
u8 *charmap = op->data, 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))
goto quit;
rc = -EFAULT;
for (h = 32; h > 0; h--)
for (i = 0; i < op->charcount; i++) {
if (get_user(tmp, &charmap[32*i+h-1]))
goto quit;
if (tmp)
goto nonzero;
}
rc = -EINVAL;
goto quit;
nonzero:
rc = -EINVAL;
op->height = h;
}
if (op->width > 32 || op->height > 32)
goto quit;
size = (op->width+7)/8 * 32 * op->charcount;
if (size > max_font_size)
return -ENOSPC;
set = 1;
} else if (op->op == KD_FONT_OP_GET)
set = 0;
else
return sw->con_font_op(vc_cons[currcons].d, op);
if (op->data) {
temp = kmalloc(size, GFP_KERNEL);
if (!temp)
return -ENOMEM;
if (set && copy_from_user(temp, op->data, size)) {
rc = -EFAULT;
goto quit;
}
op->data = temp;
}
acquire_console_sem();
rc = sw->con_font_op(vc_cons[currcons].d, op);
release_console_sem();
op->data = old_op.data;
if (!rc && !set) {
int c = (op->width+7)/8 * 32 * op->charcount;
if (op->data && op->charcount > old_op.charcount)
rc = -ENOSPC;
if (!(op->flags & KD_FONT_FLAG_OLD)) {
if (op->width > old_op.width ||
op->height > old_op.height)
rc = -ENOSPC;
} else {
if (op->width != 8)
rc = -EIO;
else if ((old_op.height && op->height > old_op.height) ||
op->height > 32)
rc = -ENOSPC;
}
if (!rc && op->data && copy_to_user(op->data, temp, c))
rc = -EFAULT;
}
quit: if (temp)
kfree(temp);
return rc;
}
/*
* Interface exported to selection and vcs.
*/
/* used by selection */
u16 screen_glyph(int currcons, int offset)
{
u16 w = scr_readw(screenpos(currcons, offset, 1));
u16 c = w & 0xff;
if (w & hi_font_mask)
c |= 0x100;
return c;
}
/* used by vcs - note the word offset */
unsigned short *screen_pos(int currcons, int w_offset, int viewed)
{
return screenpos(currcons, 2 * w_offset, viewed);
}
void getconsxy(int currcons, char *p)
{
p[0] = x;
p[1] = y;
}
void putconsxy(int currcons, char *p)
{
gotoxy(currcons, p[0], p[1]);
set_cursor(currcons);
}
u16 vcs_scr_readw(int currcons, const u16 *org)
{
if ((unsigned long)org == pos && softcursor_original != -1)
return softcursor_original;
return scr_readw(org);
}
void vcs_scr_writew(int currcons, u16 val, u16 *org)
{
scr_writew(val, org);
if ((unsigned long)org == pos) {
softcursor_original = -1;
add_softcursor(currcons);
}
}
static int pm_con_request(struct pm_dev *dev, pm_request_t rqst, void *data)
{
switch (rqst)
{
case PM_RESUME:
unblank_screen();
break;
case PM_SUSPEND:
do_blank_screen(0);
break;
}
return 0;
}
/*
* Visible symbols for modules
*/
EXPORT_SYMBOL(color_table);
EXPORT_SYMBOL(default_red);
EXPORT_SYMBOL(default_grn);
EXPORT_SYMBOL(default_blu);
EXPORT_SYMBOL(video_font_height);
EXPORT_SYMBOL(video_scan_lines);
EXPORT_SYMBOL(vc_resize);
EXPORT_SYMBOL(fg_console);
EXPORT_SYMBOL(console_blank_hook);
#ifdef CONFIG_VT
EXPORT_SYMBOL(vt_cons);
#endif
#ifndef VT_SINGLE_DRIVER
EXPORT_SYMBOL(take_over_console);
EXPORT_SYMBOL(give_up_console);
#endif
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