projects / deliverable / linux.git / blame
| Commit | Line | Data |
|---|---|---|
| 1da177e4 LT |
1 | /* |
| 2 | * Carsten Langgaard, carstenl@mips.com | |
| 3 | * Copyright (C) 1999,2000 MIPS Technologies, Inc. All rights reserved. | |
| 4 | * | |
| 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. | |
| 8 | * | |
| 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. | |
| 13 | * | |
| 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. | |
| 17 | * | |
| 18 | * Display routines for display messages in MIPS boards ascii display. | |
| 19 | */ | |
| 20 | ||
| 21 | #include <linux/compiler.h> | |
| 79894c7b | 22 | #include <linux/timer.h> |
| 1da177e4 LT |
23 | #include <asm/io.h> |
| 24 | #include <asm/mips-boards/generic.h> | |
| c3dd3de7 | 25 | #include <asm/mips-boards/prom.h> |
| 1da177e4 | 26 | |
| 79894c7b RB |
27 | extern const char display_string[]; |
| 28 | static unsigned int display_count; | |
| 29 | static unsigned int max_display_count; | |
| 30 | ||
| 1da177e4 LT |
31 | void mips_display_message(const char *str) |
| 32 | { | |
| f1974653 | 33 | static unsigned int __iomem *display = NULL; |
| 1da177e4 LT |
34 | int i; |
| 35 | ||
| 36 | if (unlikely(display == NULL)) | |
| f1974653 | 37 | display = ioremap(ASCII_DISPLAY_POS_BASE, 16*sizeof(int)); |
| 1da177e4 LT |
38 | |
| 39 | for (i = 0; i <= 14; i=i+2) { | |
| 40 | if (*str) | |
| 6d2d419f | 41 | __raw_writel(*str++, display + i); |
| 1da177e4 | 42 | else |
| 6d2d419f | 43 | __raw_writel(' ', display + i); |
| 1da177e4 LT |
44 | } |
| 45 | } | |
| 79894c7b RB |
46 | |
| 47 | static void scroll_display_message(unsigned long data); | |
| 48 | static DEFINE_TIMER(mips_scroll_timer, scroll_display_message, HZ, 0); | |
| 49 | ||
| 50 | static void scroll_display_message(unsigned long data) | |
| 51 | { | |
| 52 | mips_display_message(&display_string[display_count++]); | |
| 53 | if (display_count == max_display_count) | |
| 54 | display_count = 0; | |
| 55 | ||
| 56 | mod_timer(&mips_scroll_timer, jiffies + HZ); | |
| 57 | } | |
| 58 | ||
| 59 | void mips_scroll_message(void) | |
| 60 | { | |
| 61 | del_timer_sync(&mips_scroll_timer); | |
| 62 | max_display_count = strlen(display_string) + 1 - 8; | |
| 63 | mod_timer(&mips_scroll_timer, jiffies + 1); | |
| 64 | } |