mcu.c

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/* SPDX-License-Identifier: GPL-2.0-only */
 
#include <arch/barrier.h>
#include <cbfs.h>
#include <console/console.h>
#include <soc/mcu_common.h>
#include <soc/symbols.h>
#include <timer.h>
 
int mtk_init_mcu(struct mtk_mcu *mcu)
{
        struct stopwatch sw;
 
        if (!mcu)
                return CB_ERR_ARG;
 
        stopwatch_init(&sw);
 
        mcu->run_size = cbfs_load(mcu->firmware_name, mcu->load_buffer, mcu->buffer_size);
        if (mcu->run_size == 0) {
                printk(BIOS_ERR, "%s: Failed to load %s\n", __func__, mcu->firmware_name);
                return CB_ERR;
        }
 
        if (mcu->run_address) {
                memcpy(mcu->run_address, mcu->load_buffer, mcu->run_size);
                /* Memory barrier to ensure data is flushed before resetting MCU. */
                mb();
        }
 
        if (mcu->reset)
                mcu->reset(mcu);
 
        printk(BIOS_DEBUG, "%s: Loaded (and reset) %s in %ld msecs (%zd bytes)\n",
               __func__, mcu->firmware_name, stopwatch_duration_msecs(&sw), mcu->run_size);
 
        return CB_SUCCESS;
}