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/*
* This file is part of the coreboot project.
*
* Copyright (C) 2000 AG Electronics Ltd.
*
* 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.
*
* 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.
*/
#include <arch/io.h>
#include <device/pnp.h>
#include <stdint.h>
#include "pc97317.h"
#define PM_DEV PNP_DEV(0x2e, PC97317_PM)
#define PM_BASE 0xe8
/* The PC97317 needs clocks to be set up before the serial port will operate. */
void pc97317_enable_serial(pnp_devfn_t dev, u16 iobase)
{
/* Set base address of power management unit. */
pnp_set_logical_device(PM_DEV);
pnp_set_enable(dev, 0);
pnp_set_iobase(dev, PNP_IDX_IO0, PM_BASE);
pnp_set_enable(dev, 1);
/* Use on-chip clock multiplier. */
outb(0x03, PM_BASE);
outb(inb(PM_BASE + 1) | 0x07, PM_BASE + 1);
/* Wait for the clock to stabilise. */
while(!(inb(PM_BASE + 1) & 0x80))
;
/* Set the base address of the port. */
pnp_set_logical_device(dev);
pnp_set_enable(dev, 0);
pnp_set_iobase(dev, PNP_IDX_IO0, iobase);
pnp_set_enable(dev, 1);
}
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