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/* SPDX-License-Identifier: GPL-2.0-only */
#include <b64_decode.h>
#include <console/console.h>
#include <drivers/vpd/vpd.h>
#include <stdlib.h>
#define VPD_KEY_FEATURE_DEVICE_INFO "feature_device_info"
/*
* Extracts the "feature_level" from the "feature_device_info" VPD key.
* This key holds a base64-encoded protobuf where "feature_level" is the first entry.
*/
uint8_t vpd_get_feature_level(void)
{
const uint8_t *device_info;
int device_info_size, feature_level = 0;
uint8_t *decoded_device_info;
size_t decoded_size;
device_info = vpd_find(VPD_KEY_FEATURE_DEVICE_INFO, &device_info_size, VPD_RW);
if (!device_info)
return feature_level;
decoded_size = B64_DECODED_SIZE(device_info_size);
decoded_device_info = malloc(decoded_size);
if (!decoded_device_info) {
printk(BIOS_ERR, "%s: failed allocating %zd bytes\n", __func__, decoded_size);
return feature_level;
}
/* The index 1 of the decoded data is the "feature level" value */
if (b64_decode(device_info, device_info_size, decoded_device_info))
feature_level = decoded_device_info[1];
free(decoded_device_info);
return feature_level;
}
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