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// SPDX-License-Identifier: GPL-2.0
/*
* Copyright (C) 2025 Lucien Jheng <lucienzx159@gmail.com>
*/
#include <command.h>
#include <env.h>
#include <errno.h>
#include <linux/types.h>
#include <log.h>
int request_firmware_into_buf_via_script(void *buf, size_t max_size,
const char *script_name,
size_t *retsize)
{
char env_addr[CONFIG_SYS_CBSIZE] = { 0 };
char env_size[CONFIG_SYS_CBSIZE] = { 0 };
char *args[2] = { "run", (char *)script_name };
int ret, repeatable;
ulong addr, size;
if (!buf || !script_name || !max_size)
return -EINVAL;
/* Run the firmware loading script */
ret = cmd_process(0, 2, args, &repeatable, NULL);
if (ret) {
log_err("Firmware loading script '%s' not defined or failed.\n",
script_name);
return -EINVAL;
}
/* Prefix the FW loader variables with the script prefix */
snprintf(env_addr, sizeof(env_addr), "%s_addr", script_name);
snprintf(env_size, sizeof(env_size), "%s_size", script_name);
/* Find out where the firmware got loaded and how long it is */
addr = env_get_hex(env_addr, 0);
size = env_get_hex(env_size, 0);
/* Clear the variables set by the firmware loading script */
env_set(env_addr, NULL);
env_set(env_size, NULL);
if (!addr || !size) {
log_err("Firmware address (0x%lx) or size (0x%lx) are invalid.\n",
addr, size);
return -EINVAL;
}
if (size > max_size) {
log_err("Loaded firmware size 0x%lx exceeded maximum allowed size 0x%zx.\n",
size, max_size);
return -E2BIG;
}
if (retsize)
*retsize = size;
memcpy(buf, (void *)addr, size);
return 0;
}
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