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/*
* Copyright (C) 2018 Hardkernel Co,. Ltd
* Dongjin Kim <tobetter@gmail.com>
* Sangchul Go <sangch.go@gmail.com>
*
* SPDX-License-Identifier: GPL-2.0+
*/
#include <common.h>
#include <asm/errno.h>
#include <asm/reboot.h>
#include <mmc.h>
/* Bootloader Message
*
* This structure describes the content of a block in flash
* that is used for recovery and the bootloader to talk to
* each other.
*
* The command field is updated by linux when it wants to
* reboot into recovery or to update radio or bootloader firmware.
* It is also updated by the bootloader when firmware update
* is complete (to boot into recovery for any final cleanup)
*
* The status field is written by the bootloader after the
* completion of an "update-radio" or "update-hboot" command.
*
* The recovery field is only written by linux and used
* for the system to send a message to recovery or the
* other way around.
*/
#define MISC_OFFSET ((CONFIG_BOOTAREA_SIZE + CONFIG_PTABLE_SIZE) / 512)
struct bootloader_message {
char command[32];
char status[32];
char recovery[1024];
};
static const char *misc_magic = "recovery";
static struct bootloader_message message;
int board_get_recovery_message(void)
{
block_dev_desc_t *dev_desc;
unsigned int offset;
disk_partition_t info;
int ret;
dev_desc = mmc_get_dev(board_current_mmc());
if (NULL == dev_desc)
return AMLOGIC_REBOOT_UNKNOWN;
ret = get_partition_info_mpt_by_name(dev_desc, "misc", &info);
if (ret < 0) {
offset = MISC_OFFSET;
} else {
offset = info.start;
}
dev_desc->block_read(dev_desc->dev, offset,
(sizeof(struct bootloader_message)
+ (dev_desc->blksz -1)) / dev_desc->blksz, &message);
message.recovery[strlen(misc_magic)] = 0;
if (0 == strncmp(message.recovery, misc_magic, strlen(misc_magic))) {
return AMLOGIC_SELFINSTALL;
}
return AMLOGIC_REBOOT_UNKNOWN;
}
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