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4bcca707cf
git-svn-id: svn://svn.openwrt.org/openwrt/trunk@19000 3c298f89-4303-0410-b956-a3cf2f4a3e73
30 lines
848 B
C
30 lines
848 B
C
/*
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* ADM5120 specific early printk support
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*
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* Copyright (C) 2007-2008 Gabor Juhos <juhosg@openwrt.org>
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 as published
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* by the Free Software Foundation.
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*
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*/
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#include <linux/init.h>
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#include <linux/io.h>
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#include <asm/addrspace.h>
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#include <asm/mach-adm5120/adm5120_defs.h>
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#include <asm/mach-adm5120/adm5120_uart.h>
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#define UART_READ(r) \
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__raw_readl((void __iomem *)(KSEG1ADDR(ADM5120_UART0_BASE)+(r)))
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#define UART_WRITE(r, v) \
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__raw_writel((v), (void __iomem *)(KSEG1ADDR(ADM5120_UART0_BASE)+(r)))
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void __init prom_putchar(char ch)
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{
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while ((UART_READ(UART_REG_FLAG) & UART_FLAG_TXFE) == 0);
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UART_WRITE(UART_REG_DATA, ch);
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while ((UART_READ(UART_REG_FLAG) & UART_FLAG_TXFE) == 0);
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}
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