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/*
* Carsten Langgaard, carstenl@mips.com
* Copyright (C) 1999,2000 MIPS Technologies, Inc. All rights reserved.
*
* This program is free software; you can distribute it and/or modify it
* under the terms of the GNU General Public License (Version 2) as
* published by the Free Software Foundation.
*
* This program is distributed in the hope it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 59 Temple Place - Suite 330, Boston MA 02111-1307, USA.
*
* Putting things on the screen/serial line using YAMONs facilities.
*/
#include <linux/init.h>
#include <linux/kernel.h>
#include <linux/serial_reg.h>
#include <linux/spinlock.h>
#include <asm/io.h>
#ifdef CONFIG_MIPS_ATLAS
#include <asm/mips-boards/atlas.h>
#ifdef CONFIG_CPU_LITTLE_ENDIAN
#define PORT(offset) (ATLAS_UART_REGS_BASE + ((offset)<<3))
#else
#define PORT(offset) (ATLAS_UART_REGS_BASE + 3 + ((offset)<<3))
#endif
#elif defined(CONFIG_MIPS_SEAD)
#include <asm/mips-boards/sead.h>
#ifdef CONFIG_CPU_LITTLE_ENDIAN
#define PORT(offset) (SEAD_UART0_REGS_BASE + ((offset)<<3))
#else
#define PORT(offset) (SEAD_UART0_REGS_BASE + 3 + ((offset)<<3))
#endif
#else
#define PORT(offset) (0x3f8 + (offset))
#endif
static inline unsigned int serial_in(int offset)
{
return inb(PORT(offset));
}
static inline void serial_out(int offset, int value)
{
outb(value, PORT(offset));
}
int prom_putchar(char c)
{
while ((serial_in(UART_LSR) & UART_LSR_THRE) == 0)
;
serial_out(UART_TX, c);
return 1;
}
char prom_getchar(void)
{
while (!(serial_in(UART_LSR) & UART_LSR_DR))
;
return serial_in(UART_RX);
}
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