bootblock.c

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/* SPDX-License-Identifier: GPL-2.0-only */
 
#include <bootblock_common.h>
#include <device/pnp_type.h>
#include <amdblocks/acpimmio.h>
#include <stdint.h>
#include <superio/ite/common/ite.h>
#include <superio/ite/it8728f/it8728f.h>
#include <superio/nuvoton/common/nuvoton.h>
#include <superio/nuvoton/nct6779d/nct6779d.h>
 
static void sbxxx_enable_48mhzout(void)
{
        /* most likely programming to 48MHz out signal */
        u32 reg32;
        reg32 = misc_read32(0x28);
        reg32 &= 0xffc7ffff;
        reg32 |= 0x00100000;
        misc_write32(0x28, reg32);
 
        misc_write32(0x40, misc_read32(0x40) & (~0x80u));
}
 
static void superio_init_m(void)
{
        const pnp_devfn_t uart = PNP_DEV(0x2e, IT8728F_SP1);
        const pnp_devfn_t gpio = PNP_DEV(0x2e, IT8728F_GPIO);
 
        ite_kill_watchdog(gpio);
        ite_enable_serial(uart, CONFIG_TTYS0_BASE);
        ite_enable_3vsbsw(gpio);
}
 
static void superio_init_m_pro(void)
{
        const pnp_devfn_t uart = PNP_DEV(0x2e, NCT6779D_SP1);
 
        nuvoton_enable_serial(uart, CONFIG_TTYS0_BASE);
}
 
void bootblock_mainboard_early_init(void)
{
        /* enable SIO clock */
        sbxxx_enable_48mhzout();
 
        if (CONFIG(BOARD_ASUS_F2A85_M_PRO))
                superio_init_m_pro();
        else
                superio_init_m();
}