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/* SPDX-License-Identifier: GPL-2.0-only */
/* This file is part of the coreboot project. */
#include <arch/io.h>
#include <endian.h>
#include <device/pnp_ops.h>
#include <device/pnp_def.h>
#include "bootblock.h"
#define PNP_CFG_IDX 0x2e
#define PNP_LDN_SERIAL 0x0d
static void pnp_enter_conf_state(pnp_devfn_t dev)
{
outb(0x55, PNP_CFG_IDX);
outb(0x55, PNP_CFG_IDX);
}
static void pnp_exit_conf_state(pnp_devfn_t dev)
{
outb(0xaa, PNP_CFG_IDX);
}
static void wilco_ec_serial_init(void)
{
pnp_devfn_t dev = PNP_DEV(PNP_CFG_IDX, PNP_LDN_SERIAL);
pnp_enter_conf_state(dev);
pnp_set_logical_device(dev);
pnp_set_enable(dev, 1);
pnp_set_iobase(dev, PNP_IDX_IO1, cpu_to_be16(CONFIG_TTYS0_BASE));
pnp_write_config(dev, PNP_IDX_IO0, 1);
pnp_exit_conf_state(dev);
}
void wilco_ec_early_init(void)
{
if (CONFIG(DRIVERS_UART_8250IO))
wilco_ec_serial_init();
}
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