src/soc/mediatek/common/mcu.c

   1 /* SPDX-License-Identifier: GPL-2.0-only */
   2
   3 #include <arch/barrier.h>
   4 #include <cbfs.h>
   5 #include <console/console.h>
   6 #include <soc/mcu_common.h>
   7 #include <soc/symbols.h>
   8 #include <timer.h>
   9
  10 enum cb_err mtk_init_mcu(struct mtk_mcu *mcu)
  11 {
  12         struct stopwatch sw;
  13
  14         if (!mcu)
  15                 return CB_ERR_ARG;
  16
  17         stopwatch_init(&sw);
  18
  19         mcu->run_size = cbfs_load(mcu->firmware_name, mcu->load_buffer, mcu->buffer_size);
  20         if (mcu->run_size == 0) {
  21                 printk(BIOS_ERR, "%s: Failed to load %s\n", __func__, mcu->firmware_name);
  22                 return CB_ERR;
  23         }
  24
  25         if (mcu->run_address) {
  26                 memcpy(mcu->run_address, mcu->load_buffer, mcu->run_size);
  27                 /* Memory barrier to ensure data is flushed before resetting MCU. */
  28                 mb();
  29         }
  30
  31         if (mcu->reset)
  32                 mcu->reset(mcu);
  33
  34         printk(BIOS_DEBUG, "%s: Loaded (and reset) %s in %lld msecs (%zd bytes)\n",
  35                __func__, mcu->firmware_name, stopwatch_duration_msecs(&sw), mcu->run_size);
  36
  37         return CB_SUCCESS;
  38 }