src/soc/amd/common/block/psp/psp_efs.c

   1 /* SPDX-License-Identifier: GPL-2.0-only */
   2
   3 #include <amdblocks/psp_efs.h>
   4 #include <boot_device.h>
   5 #include <commonlib/region.h>
   6 #include <device/mmio.h>
   7 #include <types.h>
   8
   9 bool read_efs_spi_settings(uint8_t *mode, uint8_t *speed)
  10 {
  11         bool ret = false;
  12         struct embedded_firmware *efs;
  13
  14         efs = rdev_mmap(boot_device_ro(), EFS_OFFSET, sizeof(*efs));
  15         if (!efs)
  16                 return false;
  17
  18         if (efs->signature == EMBEDDED_FW_SIGNATURE) {
  19 #ifndef SPI_MODE_FIELD
  20                 printk(BIOS_ERR, "Unknown cpu in psp_efs.h\n");
  21                 printk(BIOS_ERR, "SPI speed/mode not set.\n");
  22 #else
  23                 *mode = efs->SPI_MODE_FIELD;
  24                 *speed = efs->SPI_SPEED_FIELD;
  25                 ret = true;
  26 #endif
  27         }
  28         rdev_munmap(boot_device_ro(), efs);
  29         return ret;
  30 }