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/*
* Carsten Langgaard, carstenl@mips.com
* Copyright (C) 1999,2000 MIPS Technologies, Inc. All rights reserved.
*
* This program is free software; you can distribute it and/or modify it
* under the terms of the GNU General Public License (Version 2) as
* published by the Free Software Foundation.
*
* This program is distributed in the hope it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 59 Temple Place - Suite 330, Boston MA 02111-1307, USA.
*
* Display routines for display messages in MIPS boards ascii display.
*/
#include <linux/compiler.h>
#include <linux/timer.h>
#include <asm/io.h>
#include <asm/mips-boards/generic.h>
#include <asm/mips-boards/prom.h>
extern const char display_string[];
static unsigned int display_count;
static unsigned int max_display_count;
void mips_display_message(const char *str)
{
static unsigned int __iomem *display = NULL;
int i;
if (unlikely(display == NULL))
display = ioremap(ASCII_DISPLAY_POS_BASE, 16*sizeof(int));
for (i = 0; i <= 14; i=i+2) {
if (*str)
__raw_writel(*str++, display + i);
else
__raw_writel(' ', display + i);
}
}
static void scroll_display_message(unsigned long data);
static DEFINE_TIMER(mips_scroll_timer, scroll_display_message, HZ, 0);
static void scroll_display_message(unsigned long data)
{
mips_display_message(&display_string[display_count++]);
if (display_count == max_display_count)
display_count = 0;
mod_timer(&mips_scroll_timer, jiffies + HZ);
}
void mips_scroll_message(void)
{
del_timer_sync(&mips_scroll_timer);
max_display_count = strlen(display_string) + 1 - 8;
mod_timer(&mips_scroll_timer, jiffies + 1);
}
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