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/*
* This file is subject to the terms and conditions of the GNU General Public
* License. See the file "COPYING" in the main directory of this archive
* for more details.
*
* Display routines for display messages in MIPS boards ascii display.
*
* Copyright (C) 1999,2000,2012 MIPS Technologies, Inc.
* All rights reserved.
* Authors: Carsten Langgaard <carstenl@mips.com>
* Steven J. Hill <sjhill@mips.com>
*/
#include <linux/compiler.h>
#include <linux/timer.h>
#include <linux/io.h>
#include <asm/mips-boards/generic.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 += 2) {
if (*str)
__raw_writel(*str++, display + i);
else
__raw_writel(' ', display + i);
}
}
static void scroll_display_message(struct timer_list *unused);
static DEFINE_TIMER(mips_scroll_timer, scroll_display_message);
static void scroll_display_message(struct timer_list *unused)
{
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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