psp_efs.c

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/* SPDX-License-Identifier: GPL-2.0-only */
 
#include <amdblocks/psp_efs.h>
#include <arch/mmio.h>
#include <boot_device.h>
#include <commonlib/region.h>
#include <types.h>
 
static struct embedded_firmware *efs;
 
bool efs_is_valid(void)
{
        if (!efs)
                efs = rdev_mmap(boot_device_ro(), EFS_OFFSET, sizeof(*efs));
 
        if (!efs || efs->signature != EMBEDDED_FW_SIGNATURE)
                return false;
 
        return true;
}
 
bool read_efs_spi_settings(uint8_t *mode, uint8_t *speed)
{
        if (!efs_is_valid())
                return false;
 
        *mode = efs->SPI_MODE_FIELD;
        *speed = efs->SPI_SPEED_FIELD;
        return true;
}