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/* SPDX-License-Identifier: GPL-2.0-or-later */
/* This file is part of the coreboot project. */
#include <arch/io.h>
#include <device/pnp_type.h>
#include <device/pnp.h>
#include <stdint.h>
#include "nct5104d.h"
#define NUVOTON_ENTRY_KEY 0x87
#define NUVOTON_EXIT_KEY 0xAA
/* Enable configuration: pass entry key '0x87' into index port dev
* two times. */
static void pnp_enter_conf_state(pnp_devfn_t dev)
{
u16 port = dev >> 8;
outb(NUVOTON_ENTRY_KEY, port);
outb(NUVOTON_ENTRY_KEY, port);
}
/* Disable configuration: pass exit key '0xAA' into index port dev. */
static void pnp_exit_conf_state(pnp_devfn_t dev)
{
u16 port = dev >> 8;
outb(NUVOTON_EXIT_KEY, port);
}
/* Route UARTD to pins 41-48 */
void nct5104d_enable_uartd(pnp_devfn_t dev)
{
u8 tmp;
u16 port = dev >> 8;
pnp_enter_conf_state(dev);
outb(0x1c, port);
tmp = inb(port + 1);
tmp |= 0x04;
outb(tmp, port + 1);
pnp_exit_conf_state(dev);
}
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