Merge git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux-2.6
[wrt350n-kernel.git] / arch / mips / mips-boards / generic / display.c
blob2a0057cfc30de612d4b7359021a6d13b37b4c002
1 /*
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
12 * for more details.
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>
23 #include <asm/io.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;
33 int i;
35 if (unlikely(display == NULL))
36 display = ioremap(ASCII_DISPLAY_POS_BASE, 16*sizeof(int));
38 for (i = 0; i <= 14; i=i+2) {
39 if (*str)
40 __raw_writel(*str++, display + i);
41 else
42 __raw_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)
53 display_count = 0;
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);