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/*
* $Header$
*
* lpc47b272_early_serial.c: Pre-RAM driver for SMSC LPC47B272 Super I/O chip
*
* Copyright (C) 2005 Digital Design Corporation
*
* 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., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*
* $Log$
*
*/
#include <arch/romcc_io.h>
#include "lpc47b272.h"
//----------------------------------------------------------------------------------
// Function: pnp_enter_conf_state
// Parameters: dev - high 8 bits = Super I/O port
// Return Value: None
// Description: Enable access to the LPC47B272's configuration registers.
//
static inline void pnp_enter_conf_state(device_t dev) {
unsigned port = dev>>8;
outb(0x55, port);
}
//----------------------------------------------------------------------------------
// Function: pnp_exit_conf_state
// Parameters: dev - high 8 bits = Super I/O port
// Return Value: None
// Description: Disable access to the LPC47B272's configuration registers.
//
static void pnp_exit_conf_state(device_t dev) {
unsigned port = dev>>8;
outb(0xaa, port);
}
//----------------------------------------------------------------------------------
// Function: lpc47b272_enable_serial
// Parameters: dev - high 8 bits = Super I/O port,
// low 8 bits = logical device number (per lpc47b272.h)
// iobase - processor I/O port address to assign to this serial device
// Return Value: bool
// Description: Configure the base I/O port of the specified serial device
// and enable the serial device.
//
static void lpc47b272_enable_serial(device_t dev, unsigned iobase)
{
pnp_enter_conf_state(dev);
pnp_set_logical_device(dev);
pnp_set_enable(dev, 0);
pnp_set_iobase(dev, PNP_IDX_IO0, iobase);
pnp_set_enable(dev, 1);
pnp_exit_conf_state(dev);
}
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