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// SPDX-License-Identifier: GPL-2.0+
/*
* Copyright (c) 2020 Linaro Limited
*/
#include <dfu.h>
#include <env.h>
#include <memalign.h>
#include <mtd.h>
#define DFU_ALT_BUF_LEN SZ_1K
static void board_get_alt_info(struct mtd_info *mtd, char *buf)
{
struct mtd_info *part;
bool first = true;
const char *name;
int len, partnum = 0;
name = mtd->name;
len = strlen(buf);
if (buf[0] != '\0')
len += snprintf(buf + len, DFU_ALT_BUF_LEN - len, "&");
len += snprintf(buf + len, DFU_ALT_BUF_LEN - len,
"mtd %s=", name);
list_for_each_entry(part, &mtd->partitions, node) {
partnum++;
if (!first)
len += snprintf(buf + len, DFU_ALT_BUF_LEN - len, ";");
first = false;
len += snprintf(buf + len, DFU_ALT_BUF_LEN - len,
"%s part %d",
part->name, partnum);
}
}
void set_dfu_alt_info(char *interface, char *devstr)
{
struct mtd_info *mtd;
ALLOC_CACHE_ALIGN_BUFFER(char, buf, DFU_ALT_BUF_LEN);
if (!IS_ENABLED(CONFIG_EFI_HAVE_CAPSULE_SUPPORT) &&
env_get("dfu_alt_info"))
return;
memset(buf, 0, DFU_ALT_BUF_LEN);
/*
* Currently dfu_alt_info is needed on Qemu ARM64 for
* capsule updates
*/
if (IS_ENABLED(CONFIG_EFI_CAPSULE_FIRMWARE_MANAGEMENT) &&
IS_ENABLED(CONFIG_TARGET_QEMU_ARM_64BIT)) {
/* probe all MTD devices */
mtd_probe_devices();
mtd = get_mtd_device_nm("nor0");
if (!IS_ERR_OR_NULL(mtd))
board_get_alt_info(mtd, buf);
}
env_set("dfu_alt_info", buf);
printf("dfu_alt_info set\n");
}
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