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board: samsung: e850-96: Enable EFI Capsule Update mechanism

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Make it possible to update E850-96 firmware binaries using EFI Capsule
Update mechanism. For example, to update the U-Boot binary, the capsule
file can be generated like this:

    $ ./tools/mkeficapsule --index 4 \
      --guid 629578c3-ffb3-4a89-ac0c-611840727779 \
      u-boot.bin capsule4.bin

The resulting 'capsule4.bin' should be copied to ESP partition (in
/boot/efi/EFI/UpdateCapsule/ directory). Then after reboot U-Boot will
update the 'bootloader' area in eMMC Boot Partition A (boot0) and remove
the capsule file, by EFI boot manager executed as a part of Standard
Boot:

    Applying capsule capsule4.bin succeeded.
    Reboot after firmware update.

The kernel will also expose the ESRT table information via SysFS in
/sys/firmware/efi/esrt/entries.

Signed-off-by: Sam Protsenko <semen.protsenko@linaro.org>
Signed-off-by: Minkyu Kang <mk7.kang@samsung.com>
This commit is contained in:
Sam Protsenko 2025-07-09 17:29:25 -05:00 committed by Minkyu Kang
parent 9472bc2b50
commit fd76fdc34e
3 changed files with 64 additions and 0 deletions
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40
board/samsung/e850-96/e850-96.c
View File

@ -4,6 +4,7 @@
* Author: Sam Protsenko <semen.protsenko@linaro.org>
*/
#include <efi_loader.h>
#include <env.h>
#include <init.h>
#include <mapmem.h>
@ -15,6 +16,45 @@
#define OTP_CHIPID0 0x4
#define OTP_CHIPID1 0x8
struct efi_fw_image fw_images[] = {
{
.image_type_id = E850_96_FWBL1_IMAGE_GUID,
.fw_name = u"E850-96-FWBL1",
.image_index = 1,
},
{
.image_type_id = E850_96_EPBL_IMAGE_GUID,
.fw_name = u"E850-96-EPBL",
.image_index = 2,
},
{
.image_type_id = E850_96_BL2_IMAGE_GUID,
.fw_name = u"E850-96-BL2",
.image_index = 3,
},
{
.image_type_id = E850_96_BOOTLOADER_IMAGE_GUID,
.fw_name = u"E850-96-BOOTLOADER",
.image_index = 4,
},
{
.image_type_id = E850_96_EL3_MON_IMAGE_GUID,
.fw_name = u"E850-96-EL3-MON",
.image_index = 5,
},
};
struct efi_capsule_update_info update_info = {
.dfu_string = "mmc 0="
"fwbl1.img raw 0x0 0x18 mmcpart 1;"
"epbl.img raw 0x18 0x98 mmcpart 1;"
"bl2.img raw 0xb0 0x200 mmcpart 1;"
"bootloader.img raw 0x438 0x1000 mmcpart 1;"
"el3_mon.img raw 0x1438 0x200 mmcpart 1",
.num_images = ARRAY_SIZE(fw_images),
.images = fw_images,
};
int dram_init(void)
{
return fdtdec_setup_mem_size_base();

3
configs/e850-96_defconfig
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@ -15,6 +15,9 @@ CONFIG_SYS_LOAD_ADDR=0x80000000
CONFIG_ENV_OFFSET_REDUND=0x10000
# CONFIG_PSCI_RESET is not set
CONFIG_EFI_SET_TIME=y
CONFIG_EFI_RUNTIME_UPDATE_CAPSULE=y
CONFIG_EFI_CAPSULE_ON_DISK=y
CONFIG_EFI_CAPSULE_FIRMWARE_RAW=y
CONFIG_BOOTSTD_FULL=y
CONFIG_DEFAULT_FDT_FILE="exynos850-e850-96.dtb"
# CONFIG_DISPLAY_CPUINFO is not set

21
include/configs/e850-96.h
View File

@ -9,4 +9,25 @@
#ifndef __E850_96_H
#define __E850_96_H
/* GUIDs for capsule updatable firmware images */
#define E850_96_FWBL1_IMAGE_GUID \
EFI_GUID(0x181cd3f2, 0xe375, 0x44d2, 0x80, 0x78, \
0x32, 0x21, 0xe1, 0xdf, 0xb9, 0x5e)
#define E850_96_EPBL_IMAGE_GUID \
EFI_GUID(0x66c1a54d, 0xd149, 0x415d, 0xaa, 0xda, \
0xb8, 0xae, 0xe4, 0x99, 0xb3, 0x70)
#define E850_96_BL2_IMAGE_GUID \
EFI_GUID(0x89471c2a, 0x6c8d, 0x4158, 0xac, 0xad, \
0x23, 0xd3, 0xb2, 0x87, 0x3d, 0x35)
#define E850_96_BOOTLOADER_IMAGE_GUID \
EFI_GUID(0x629578c3, 0xffb3, 0x4a89, 0xac, 0x0c, \
0x61, 0x18, 0x40, 0x72, 0x77, 0x79)
#define E850_96_EL3_MON_IMAGE_GUID \
EFI_GUID(0xdf5718a2, 0x930a, 0x4916, 0xbb, 0x19, \
0x32, 0x13, 0x21, 0x4d, 0x84, 0x86)
#endif /* __E850_96_H */