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/* SPDX-License-Identifier: GPL-2.0-only */
/*
* Copyright (c) 2013 Juergen Beisert <kernel@pengutronix.de>, Pengutronix
*/
#ifndef FIRMWARE_H
#define FIRMWARE_H
#include <pbl.h>
#include <printk.h>
#include <types.h>
#include <driver.h>
#include <debug_ll.h>
#include <linux/kernel.h>
struct firmware {
size_t size;
const u8 *data;
};
struct firmware_handler {
char *id; /* unique identifier for this firmware device */
char *model; /* description for this device */
struct device *dev;
void *priv;
struct device_node *device_node;
/* called once to prepare the firmware's programming cycle */
int (*open)(struct firmware_handler*);
/* called multiple times to program the firmware with the given data */
int (*write)(struct firmware_handler*, const void*, size_t);
/* called once to finish programming cycle */
int (*close)(struct firmware_handler*);
};
struct firmware_mgr;
int firmwaremgr_register(struct firmware_handler *);
struct firmware_mgr *firmwaremgr_find(const char *);
#ifdef CONFIG_FIRMWARE
struct firmware_mgr *firmwaremgr_find_by_node(struct device_node *np);
int firmwaremgr_load_file(struct firmware_mgr *, const char *path);
char *firmware_get_searchpath(void);
void firmware_set_searchpath(const char *path);
int request_firmware(const struct firmware **fw, const char *fw_name, struct device *dev);
void release_firmware(const struct firmware *fw);
#else
static inline struct firmware_mgr *firmwaremgr_find_by_node(struct device_node *np)
{
return NULL;
}
static inline int firmwaremgr_load_file(struct firmware_mgr *mgr, const char *path)
{
return -ENOSYS;
}
static inline char *firmware_get_searchpath(void)
{
return NULL;
}
static inline void firmware_set_searchpath(const char *path)
{
}
static inline int request_firmware(const struct firmware **fw, const char *fw_name,
struct device *dev)
{
return -EINVAL;
}
static inline void release_firmware(const struct firmware *fw)
{
}
#endif
void firmwaremgr_list_handlers(void);
static inline void firmware_ext_verify(const void *data_start, size_t data_size,
const void *hash_start, size_t hash_size)
{
if (pbl_barebox_verify(data_start, data_size,
hash_start, hash_size) != 0) {
putc_ll('!');
panic("hash mismatch, refusing to decompress");
}
}
#define __get_builtin_firmware(name, offset, start, size) \
do { \
extern char _fw_##name##_start[]; \
extern char _fw_##name##_end[]; \
extern char _fw_##name##_sha_start[]; \
extern char _fw_##name##_sha_end[]; \
*start = (typeof(*start)) _fw_##name##_start; \
*size = _fw_##name##_end - _fw_##name##_start; \
if (!(offset)) \
break; \
*start += (offset); \
firmware_ext_verify( \
*start, *size, \
_fw_##name##_sha_start, \
_fw_##name##_sha_end - _fw_##name##_sha_start \
); \
} while (0)
#define get_builtin_firmware(name, start, size) \
__get_builtin_firmware(name, 0, start, size)
#define get_builtin_firmware_ext(name, base, start, size) \
__get_builtin_firmware(name, (long)base - (long)_text, start, size)
#endif /* FIRMWARE_H */
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