// SPDX-License-Identifier: GPL-2.0

#include <linux/module.h>

#include <avm/enh/fw_info.h>

/*
 * This file contains a fallback to the legacy avm_kernel_* api if available.
 *
 * To easy the migration to fw_info this can be used.
 */

/*
 * Declare the external symbols needed. Don't use a header here to avoid
 * introducing a dependency on the actual kernel.
 */
extern struct _avm_kernel_module_memory_config *avm_kernel_module_memory_config;
extern struct _avm_kernel_version_info *avm_kernel_version_info;
extern struct _avm_kernel_urlader_env *avm_kernel_urlader_env;

/*
 * Define these symbols as weak and initialize them with NULL.
 *
 * Some kernels did not support avm_kernel_* at all (like puma6) but won't use
 * the fw_info mechanism. So define weak symbols to provide an empty api.
 */
__weak struct _avm_kernel_module_memory_config *avm_kernel_module_memory_config;
__weak struct _avm_kernel_version_info *avm_kernel_version_info;
__weak struct _avm_kernel_urlader_env *avm_kernel_urlader_env;

__init void avm_fw_info_init(void)
{
}

const char *avm_fw_version(void)
{
	if (!avm_kernel_version_info)
		return NULL;

	return avm_kernel_version_info->firmwarestring;
}

bool avm_fw_is_internal(void)
{
	int len;

	if (!avm_kernel_version_info)
		return NULL;

	len = strlen(avm_kernel_version_info->svnversion);

	return len && avm_kernel_version_info->svnversion[len - 1] == 'M';
}

struct _avm_kernel_module_memory_config *avm_fw_module_sizes(void)
{
	return avm_kernel_module_memory_config;
}

struct _avm_kernel_urlader_env *avm_fw_urlader_env(void)
{
	return avm_kernel_urlader_env;
}

static __init int fw_info_print_banner(void)
{
	const char *version = avm_fw_version();

	if (!version)
		version = "unknown";

	if (avm_fw_is_internal())
		pr_err("Version %s (internal only)\n", version);
	else
		pr_err("Version %s\n", version);

	return 0;
}
postcore_initcall(fw_info_print_banner);