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/* SPDX-License-Identifier: GPL-2.0-only */
/* This file is part of the coreboot project. */
#include <stdint.h>
#include <arch/io.h>
#include <delay.h>
#include "chip.h"
#include "kempld.h"
#include "kempld_internal.h"
void kempld_write8(const uint8_t addr, const uint8_t data)
{
outb(addr, KEMPLD_IDX);
outb(data, KEMPLD_DAT);
}
uint8_t kempld_read8(const uint8_t addr)
{
outb(addr, KEMPLD_IDX);
return inb(KEMPLD_DAT);
}
int kempld_get_mutex(int timeout_ms)
{
while (inb(KEMPLD_IDX) & KEMPLD_MUTEX_KEY && timeout_ms--)
mdelay(1);
return timeout_ms;
}
void kempld_release_mutex(void)
{
outb(KEMPLD_MUTEX_KEY, KEMPLD_IDX);
}
void kempld_enable_uart_for_console(void)
{
if (!CONFIG(CONSOLE_SERIAL))
return;
if (kempld_get_mutex(100) < 0)
return;
switch (CONFIG_UART_FOR_CONSOLE) {
case 0:
kempld_write8(KEMPLD_UART_0,
KEMPLD_UART_ENABLE |
KEMPLD_UART_3F8 << KEMPLD_UART_IO_SHIFT);
break;
case 1:
kempld_write8(KEMPLD_UART_1,
KEMPLD_UART_ENABLE |
KEMPLD_UART_2F8 << KEMPLD_UART_IO_SHIFT);
break;
default:
break;
}
kempld_release_mutex();
}
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