Commit | Line | Data |
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1da177e4 | 1 | /* |
49bffbdc SH |
2 | * This file is subject to the terms and conditions of the GNU General Public |
3 | * License. See the file "COPYING" in the main directory of this archive | |
4 | * for more details. | |
1da177e4 LT |
5 | * |
6 | * Display routines for display messages in MIPS boards ascii display. | |
49bffbdc SH |
7 | * |
8 | * Copyright (C) 1999,2000,2012 MIPS Technologies, Inc. | |
9 | * All rights reserved. | |
10 | * Authors: Carsten Langgaard <carstenl@mips.com> | |
11 | * Steven J. Hill <sjhill@mips.com> | |
1da177e4 | 12 | */ |
1da177e4 | 13 | #include <linux/compiler.h> |
79894c7b | 14 | #include <linux/timer.h> |
49bffbdc SH |
15 | #include <linux/io.h> |
16 | ||
1da177e4 LT |
17 | #include <asm/mips-boards/generic.h> |
18 | ||
79894c7b RB |
19 | extern const char display_string[]; |
20 | static unsigned int display_count; | |
21 | static unsigned int max_display_count; | |
22 | ||
1da177e4 LT |
23 | void mips_display_message(const char *str) |
24 | { | |
f1974653 | 25 | static unsigned int __iomem *display = NULL; |
1da177e4 LT |
26 | int i; |
27 | ||
28 | if (unlikely(display == NULL)) | |
f1974653 | 29 | display = ioremap(ASCII_DISPLAY_POS_BASE, 16*sizeof(int)); |
1da177e4 | 30 | |
49bffbdc SH |
31 | for (i = 0; i <= 14; i += 2) { |
32 | if (*str) | |
33 | __raw_writel(*str++, display + i); | |
34 | else | |
35 | __raw_writel(' ', display + i); | |
1da177e4 LT |
36 | } |
37 | } | |
79894c7b RB |
38 | |
39 | static void scroll_display_message(unsigned long data); | |
40 | static DEFINE_TIMER(mips_scroll_timer, scroll_display_message, HZ, 0); | |
41 | ||
42 | static void scroll_display_message(unsigned long data) | |
43 | { | |
44 | mips_display_message(&display_string[display_count++]); | |
45 | if (display_count == max_display_count) | |
46 | display_count = 0; | |
47 | ||
48 | mod_timer(&mips_scroll_timer, jiffies + HZ); | |
49 | } | |
50 | ||
51 | void mips_scroll_message(void) | |
52 | { | |
53 | del_timer_sync(&mips_scroll_timer); | |
54 | max_display_count = strlen(display_string) + 1 - 8; | |
55 | mod_timer(&mips_scroll_timer, jiffies + 1); | |
56 | } |