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/* SPDX-License-Identifier: GPL-2.0-only */
#include <bootblock_common.h>
#include <superio/nuvoton/common/nuvoton.h>
#include <superio/nuvoton/nct6791d/nct6791d.h>
#include <superio/aspeed/common/aspeed.h>
#include <superio/aspeed/ast2400/ast2400.h>
#include <console/uart.h>
#include <console/console.h>
#include <device/pnp_ops.h>
#include <delay.h>
#include "gpio.h"
#include <gpio.h>
#include <timer.h>
static int64_t bmc_ready_elapsed = 0;
void bootblock_mainboard_early_init(void)
{
gpio_configure_pads(early_gpio_table, ARRAY_SIZE(early_gpio_table));
/*
* We must wait for the BMC firmware to be ready before proceeding past
* early init:
* - The BMC UART (the physical serial port) won't work until the BMC is
* configured
* - The BMC will reset the TPM configuration during startup,
* coreboot must not configure or communicate with the TPM before then
*
* This usually takes about 30 seconds for a boot right after power on.
*/
struct stopwatch sw;
stopwatch_init_msecs_expire(&sw, 120 * 1000);
while (!stopwatch_expired(&sw)) {
/* Wait for J2 to go low - BMC ready signal from BMC firmware */
if (!gpio_get(GPP_J2))
break;
mdelay(1000);
}
/* Trace the time spent later once the console is up */
if (stopwatch_expired(&sw))
bmc_ready_elapsed = -1;
else
bmc_ready_elapsed = stopwatch_duration_msecs(&sw);
/*
* Disable the Nuvoton NCT6791D SuperIO UART1. It is enabled by
* default, but the AST2500's is connected to the serial port.
*/
const pnp_devfn_t nvt_serial_dev = PNP_DEV(0x2E, NCT6791D_SP1);
nuvoton_pnp_enter_conf_state(nvt_serial_dev);
pnp_set_logical_device(nvt_serial_dev);
pnp_set_enable(nvt_serial_dev, 0);
nuvoton_pnp_exit_conf_state(nvt_serial_dev);
/* Enable AST2500 SuperIO UART1 */
const pnp_devfn_t ast_serial_dev = PNP_DEV(0x4E, AST2400_SUART1);
aspeed_enable_serial(ast_serial_dev, CONFIG_TTYS0_BASE);
}
void bootblock_mainboard_init(void)
{
if (bmc_ready_elapsed >= 0) {
printk(BIOS_INFO, "BMC became ready in early init after %lld ms\n",
bmc_ready_elapsed);
} else {
/* Better to boot than to render the system unusable, but some
peripherals may not work */
printk(BIOS_ERR, "BMC was not ready within timeout, booting anyway\n");
}
}
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