57 lines
1.5 KiB
C
57 lines
1.5 KiB
C
/*
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* This file is subject to the terms and conditions of the GNU General Public
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* License. See the file "COPYING" in the main directory of this archive
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* for more details.
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*
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* Display routines for display messages in MIPS boards ascii display.
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*
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* Copyright (C) 1999,2000,2012 MIPS Technologies, Inc.
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* All rights reserved.
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* Authors: Carsten Langgaard <carstenl@mips.com>
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* Steven J. Hill <sjhill@mips.com>
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*/
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#include <linux/compiler.h>
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#include <linux/timer.h>
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#include <linux/io.h>
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#include <asm/mips-boards/generic.h>
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extern const char display_string[];
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static unsigned int display_count;
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static unsigned int max_display_count;
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void mips_display_message(const char *str)
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{
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static unsigned int __iomem *display = NULL;
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int i;
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if (unlikely(display == NULL))
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display = ioremap(ASCII_DISPLAY_POS_BASE, 16*sizeof(int));
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for (i = 0; i <= 14; i += 2) {
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if (*str)
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__raw_writel(*str++, display + i);
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else
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__raw_writel(' ', display + i);
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}
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}
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static void scroll_display_message(struct timer_list *unused);
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static DEFINE_TIMER(mips_scroll_timer, scroll_display_message);
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static void scroll_display_message(struct timer_list *unused)
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{
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mips_display_message(&display_string[display_count++]);
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if (display_count == max_display_count)
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display_count = 0;
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mod_timer(&mips_scroll_timer, jiffies + HZ);
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}
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void mips_scroll_message(void)
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{
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del_timer_sync(&mips_scroll_timer);
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max_display_count = strlen(display_string) + 1 - 8;
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mod_timer(&mips_scroll_timer, jiffies + 1);
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}
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