5d600054090a5c258a448a77340de12d205fd906
2 * Carsten Langgaard, carstenl@mips.com
3 * Copyright (C) 1999,2000 MIPS Technologies, Inc. All rights reserved.
5 * This program is free software; you can distribute it and/or modify it
6 * under the terms of the GNU General Public License (Version 2) as
7 * published by the Free Software Foundation.
9 * This program is distributed in the hope it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
14 * You should have received a copy of the GNU General Public License along
15 * with this program; if not, write to the Free Software Foundation, Inc.,
16 * 59 Temple Place - Suite 330, Boston MA 02111-1307, USA.
18 * Display routines for display messages in MIPS boards ascii display.
21 #include <linux/compiler.h>
22 #include <linux/timer.h>
24 #include <asm/mips-boards/generic.h>
26 extern const char display_string
[];
27 static unsigned int display_count
;
28 static unsigned int max_display_count
;
30 void mips_display_message(const char *str
)
32 static unsigned int __iomem
*display
= NULL
;
35 if (unlikely(display
== NULL
))
36 display
= ioremap(ASCII_DISPLAY_POS_BASE
, 16*sizeof(int));
38 for (i
= 0; i
<= 14; i
=i
+2) {
40 writel(*str
++, display
+ i
);
42 writel(' ', display
+ i
);
46 static void scroll_display_message(unsigned long data
);
47 static DEFINE_TIMER(mips_scroll_timer
, scroll_display_message
, HZ
, 0);
49 static void scroll_display_message(unsigned long data
)
51 mips_display_message(&display_string
[display_count
++]);
52 if (display_count
== max_display_count
)
55 mod_timer(&mips_scroll_timer
, jiffies
+ HZ
);
58 void mips_scroll_message(void)
60 del_timer_sync(&mips_scroll_timer
);
61 max_display_count
= strlen(display_string
) + 1 - 8;
62 mod_timer(&mips_scroll_timer
, jiffies
+ 1);