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/*-
* Copyright (c) 2005, Sam Leffler <sam@errno.com>
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice unmodified, this list of conditions, and the following
* disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
* $FreeBSD: release/9.1.0/sys/sys/firmware.h 166756 2007-02-15 17:21:31Z luigi $
*/
#ifndef _SYS_FIRMWARE_H_
#define _SYS_FIRMWARE_H_
/*
* Loadable firmware support.
*
* The firmware abstraction provides an interface for loading firmware
* images into the kernel and making them available to clients.
*
* Firmware images are usually embedded in kernel loadable modules that can
* be loaded on-demand or pre-loaded as desired. Modules may contain
* one or more firmware images that are stored as opaque data arrays
* and registered with a unique string name. Clients request
* firmware by name, and are returned a struct firmware * below on success.
* The kernel keeps track of references to firmware images to allow/prevent
* module/data unload.
*
* When multiple images are stored in one module, the first image is
* treated as the master with the other images holding references
* to it. This means that to unload the module each dependent/subimage
* must first have its references removed.
* In order for automatic loading to work, the master image must have
* the same name as the module it is embedded into.
*/
struct firmware {
const char *name; /* system-wide name */
const void *data; /* location of image */
size_t datasize; /* size of image in bytes */
unsigned int version; /* version of the image */
};
const struct firmware *firmware_register(const char *,
const void *, size_t, unsigned int, const struct firmware *);
int firmware_unregister(const char *);
const struct firmware *firmware_get(const char *);
#define FIRMWARE_UNLOAD 0x0001 /* unload if unreferenced */
void firmware_put(const struct firmware *, int);
#endif /* _SYS_FIRMWARE_H_ */