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/*
* lpc47m10x_early_serial.c: Pre-RAM driver for SMSC LPC47M10X2 Super I/O chip
* derived from lpc47n217
*
* 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
*/
#include <arch/romcc_io.h>
#include "lpc47m10x.h"
/** Enable access to the LPC47M10X2's configuration registers. */
static inline void pnp_enter_conf_state(device_t dev)
{
unsigned port = dev>>8;
outb(0x55, port);
}
/** Disable access to the LPC47M10X2's configuration registers. */
static void pnp_exit_conf_state(device_t dev)
{
unsigned port = dev>>8;
outb(0xaa, port);
}
/**
* Configure the base I/O port of the specified serial device and enable the
* serial device.
*
* @param dev High 8 bits = Super I/O port, low 8 bits = logical device number.
* @param iobase Processor I/O port address to assign to this serial device.
*/
static void lpc47m10x_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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