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/*
* This file is part of the coreboot project.
*
* Copyright (C) 2008 Arastra, Inc.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that 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.
*/
#ifndef SUPERIO_INTEL_I8900_I8900_H
#define SUPERIO_INTEL_I8900_I8900_H
#include <device/pnp_type.h>
/*
* The SIW ("Serial I/O and Watchdog Timer") integrated into the i8900 is
* very similar to a Super I/O, both in functionality and config mechanism.
*
* The SIW contains:
* - UART(s)
* - Serial interrupt controller
* - Watchdog timer (WDT)
* - LPC interface
*/
/* Logical device numbers (LDNs). */
#define I8900_SP1 0x04 /* Com1 */
#define I8900_SP2 0x05 /* Com2 */
#define I8900_WDT 0x06 /* Watchdog timer */
/* Registers and bit definitions: */
#define I8900_SIW_CONFIGURATION 0x29
/*
* SIW_CONFIGURATION[3:2] = UART_CLK predivide
* 00: divide by 1
* 01: divide by 8
* 10: divide by 26
* 11: reserved
*/
#define I8900_UART_CLK_PREDIVIDE_1 0x00
#define I8900_UART_CLK_PREDIVIDE_8 0x01
#define I8900_UART_CLK_PREDIVIDE_26 0x02
#define I8900_ENABLE_SIRQ 0x01
void i8900_configure_uart_clk(pnp_devfn_t dev, u8 predivide);
void i8900_enable_serial(pnp_devfn_t dev, u16 iobase);
void i8900_enable_wdt(pnp_devfn_t dev, u16 iobase);
#endif
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