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Switch to vc 0 and softscrolling when /dev/video is opened and switch back

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at the close. This should prevent problems with X on (emulated) Cirrus
cards.
This commit is contained in:
Philip Homburg 2006-07-19 11:50:18 +00:00
parent 0d9976ae9f
commit f6d1f6fdf6
1 changed files with 43 additions and 1 deletions
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44
drivers/tty/console.c
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@ -83,6 +83,13 @@ PRIVATE unsigned scr_width; /* # characters on a line */
PRIVATE unsigned scr_lines; /* # lines on the screen */
PRIVATE unsigned scr_size; /* # characters on the screen */
PRIVATE int disabled_vc = -1; /* Virtual console that was active when
* disable_console was called.
*/
PRIVATE int disabled_sm; /* Scroll mode to be restored when re-enabling
* console
*/
/* Per console data. */
typedef struct console {
tty_t *c_tty; /* associated TTY struct */
@ -133,9 +140,11 @@ FORWARD _PROTOTYPE( void set_6845, (int reg, unsigned val) );
FORWARD _PROTOTYPE( void get_6845, (int reg, unsigned *val) );
FORWARD _PROTOTYPE( void stop_beep, (timer_t *tmrp) );
FORWARD _PROTOTYPE( void cons_org0, (void) );
FORWARD _PROTOTYPE( void disable_console, (void) );
FORWARD _PROTOTYPE( void reenable_console, (void) );
FORWARD _PROTOTYPE( int ga_program, (struct sequence *seq) );
FORWARD _PROTOTYPE( int cons_ioctl, (tty_t *tp, int) );
PRIVATE _PROTOTYPE( void ser_putc, (char c) );
FORWARD _PROTOTYPE( void ser_putc, (char c) );
/*===========================================================================*
* cons_write *
@ -792,9 +801,11 @@ PUBLIC void do_video(message *m)
switch (m->m_type) {
case DEV_OPEN:
/* Should grant IOPL */
disable_console();
r= OK;
break;
case DEV_CLOSE:
reenable_console();
r= OK;
break;
case DEV_IOCTL_S:
@ -1214,6 +1225,37 @@ PRIVATE void cons_org0()
select_console(ccurrent);
}
/*===========================================================================*
* disable_console *
*===========================================================================*/
PRIVATE void disable_console()
{
if (disabled_vc != -1)
return;
disabled_vc = ccurrent;
disabled_sm = softscroll;
cons_org0();
softscroll = 1;
select_console(0);
/* Should also disable further output to virtual consoles */
}
/*===========================================================================*
* reenable_console *
*===========================================================================*/
PRIVATE void reenable_console()
{
if (disabled_vc == -1)
return;
softscroll = disabled_sm;
select_console(disabled_vc);
disabled_vc = -1;
}
/*===========================================================================*
* select_console *
*===========================================================================*/