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/* $Id: serial.h,v 1.2 2000/01/17 23:32:47 ralf Exp $
*
* 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) 1999 by Ralf Baechle
* Copyright (C) 1999, 2000 Silicon Graphics, Inc.
*/
#ifndef _ASM_SERIAL_H
#define _ASM_SERIAL_H
#include <linux/config.h>
#include <asm/sn/sn0/ip27.h>
/*
* This assumes you have a 1.8432 MHz clock for your UART.
*
* It'd be nice if someone built a serial card with a 24.576 MHz
* clock, since the 16550A is capable of handling a top speed of 1.5
* megabits/second; but this requires the faster clock.
*/
#define BASE_BAUD (1843200 / 16)
/* Standard COM flags (except for COM4, because of the 8514 problem) */
#define STD_COM_FLAGS (ASYNC_BOOT_AUTOCONF | ASYNC_SKIP_TEST)
/*
* The IOC3 serials use a 22MHz clock rate with an additional divider by 3.
*/
#define IOC3_BAUD (22000000 / (3*16))
#define IOC3_COM_FLAGS (ASYNC_BOOT_AUTOCONF | ASYNC_SKIP_TEST | ASYNC_IOC3)
/* Let the compiler figure out the size. */
#define RS_TABLE_SIZE
#ifdef CONFIG_SGI_IP27
#define _ORIGIN_SERIAL_INIT(int, base) \
{ baud_base: IOC3_BAUD, irq: int, flags: IOC3_COM_FLAGS, \
iomem_base: (u8 *) base, iomem_reg_shift: 0, \
io_type: SERIAL_IO_MEM }
#define ORIGIN_SERIAL_PORT_DFNS \
_ORIGIN_SERIAL_INIT(0, 0x9200000008620178UL), \
_ORIGIN_SERIAL_INIT(0, 0x9200000008620170UL),
#else
#define ORIGIN_SERIAL_PORT_DFNS
#endif
#define SERIAL_PORT_DFNS \
ORIGIN_SERIAL_PORT_DFNS
#endif /* _ASM_SERIAL_H */
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