Release 4.7 arch/mips/mti-sead3/sead3-console.c

/*
 * This file is subject to the terms and conditions of the GNU General Public
 * License.  See the file "COPYING" in the main directory of this archive
 * for more details.
 *
 * Copyright (C) 2012 MIPS Technologies, Inc.  All rights reserved.
 */
#include <linux/init.h>
#include <linux/console.h>
#include <linux/serial_reg.h>
#include <linux/io.h>


#define SEAD_UART1_REGS_BASE	0xbf000800   
/* ttyS1 = DB9 port */

#define SEAD_UART0_REGS_BASE	0xbf000900   
/* ttyS0 = USB port   */

#define PORT(base_addr, offset) ((unsigned int __iomem *)(base_addr+(offset)*4))


static char console_port = 1;



static inline unsigned int serial_in(int offset, unsigned int base_addr)
{
	return __raw_readl(PORT(base_addr, offset)) & 0xff;
}

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static inline void serial_out(int offset, int value, unsigned int base_addr)
{
	__raw_writel(value, PORT(base_addr, offset));
}

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void __init fw_init_early_console(char port)
{
	console_port = port;
}

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int prom_putchar(char c)
{
	unsigned int base_addr;

	base_addr = console_port ? SEAD_UART1_REGS_BASE : SEAD_UART0_REGS_BASE;

	while ((serial_in(UART_LSR, base_addr) & UART_LSR_THRE) == 0)
		;

	serial_out(UART_TX, c, base_addr);

	return 1;
}
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Directory: arch/mips/mti-sead3

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