3070033a16
More information about the SEAD-3 platform can be found at <http://www.mips.com/products/development-kits/mips-sead-3/> on MTI's site. Currently, the M14K family of cores is what the SEAD-3 is utilised with. Signed-off-by: Douglas Leung <douglas@mips.com> Signed-off-by: Chris Dearman <chris@mips.com> Signed-off-by: Steven J. Hill <sjhill@mips.com>
78 lines
2.1 KiB
C
78 lines
2.1 KiB
C
/*
|
|
* 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.
|
|
*
|
|
* Copyright (C) 2012 MIPS Technologies, Inc. All rights reserved.
|
|
*/
|
|
#include <linux/timer.h>
|
|
#include <linux/io.h>
|
|
#include <asm/mips-boards/generic.h>
|
|
#include <asm/mips-boards/prom.h>
|
|
|
|
static unsigned int display_count;
|
|
static unsigned int max_display_count;
|
|
|
|
#define LCD_DISPLAY_POS_BASE 0x1f000400
|
|
#define DISPLAY_LCDINSTRUCTION (0*2)
|
|
#define DISPLAY_LCDDATA (1*2)
|
|
#define DISPLAY_CPLDSTATUS (2*2)
|
|
#define DISPLAY_CPLDDATA (3*2)
|
|
#define LCD_SETDDRAM 0x80
|
|
#define LCD_IR_BF 0x80
|
|
|
|
const char display_string[] = " LINUX ON SEAD3 ";
|
|
|
|
static void scroll_display_message(unsigned long data);
|
|
static DEFINE_TIMER(mips_scroll_timer, scroll_display_message, HZ, 0);
|
|
|
|
static void lcd_wait(unsigned int __iomem *display)
|
|
{
|
|
/* Wait for CPLD state machine to become idle. */
|
|
do { } while (__raw_readl(display + DISPLAY_CPLDSTATUS) & 1);
|
|
|
|
do {
|
|
__raw_readl(display + DISPLAY_LCDINSTRUCTION);
|
|
|
|
/* Wait for CPLD state machine to become idle. */
|
|
do { } while (__raw_readl(display + DISPLAY_CPLDSTATUS) & 1);
|
|
} while (__raw_readl(display + DISPLAY_CPLDDATA) & LCD_IR_BF);
|
|
}
|
|
|
|
void mips_display_message(const char *str)
|
|
{
|
|
static unsigned int __iomem *display;
|
|
char ch;
|
|
int i;
|
|
|
|
if (unlikely(display == NULL))
|
|
display = ioremap_nocache(LCD_DISPLAY_POS_BASE,
|
|
(8 * sizeof(int)));
|
|
|
|
for (i = 0; i < 16; i++) {
|
|
if (*str)
|
|
ch = *str++;
|
|
else
|
|
ch = ' ';
|
|
lcd_wait(display);
|
|
__raw_writel((LCD_SETDDRAM | i),
|
|
(display + DISPLAY_LCDINSTRUCTION));
|
|
lcd_wait(display);
|
|
__raw_writel(ch, display + DISPLAY_LCDDATA);
|
|
}
|
|
}
|
|
|
|
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 - 16;
|
|
mod_timer(&mips_scroll_timer, jiffies + 1);
|
|
}
|