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/*
* Ralink RT288x SoC early printk support
*
* Copyright (C) 2009 Gabor Juhos <juhosg@openwrt.org>
* Copyright (C) 2008 Imre Kaloz <kaloz@openwrt.org>
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 as published
* by the Free Software Foundation.
*/
#include <linux/io.h>
#include <linux/serial_reg.h>
#include <asm/addrspace.h>
#include <asm/mach-ralink/rt288x_regs.h>
#define UART_READ(r) \
__raw_readl((void __iomem *)(KSEG1ADDR(RT2880_UART1_BASE) + 4 * (r)))
#define UART_WRITE(r, v) \
__raw_writel((v), (void __iomem *)(KSEG1ADDR(RT2880_UART1_BASE) + 4 * (r)))
void prom_putchar(unsigned char ch)
{
while (((UART_READ(UART_REG_LSR)) & UART_LSR_THRE) == 0);
UART_WRITE(UART_REG_TX, ch);
while (((UART_READ(UART_REG_LSR)) & UART_LSR_THRE) == 0);
}
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