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sys/dev/bhnd/nvram/bhnd_nvram.c
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/*- | |||||
* Copyright (c) 2016 Landon Fuller <landonf@FreeBSD.org> | |||||
* 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, this list of conditions and the following disclaimer, | |||||
* without modification. | |||||
* 2. Redistributions in binary form must reproduce at minimum a disclaimer | |||||
* similar to the "NO WARRANTY" disclaimer below ("Disclaimer") and any | |||||
* redistribution must be conditioned upon including a substantially | |||||
* similar Disclaimer requirement for further binary redistribution. | |||||
* | |||||
* NO WARRANTY | |||||
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS | |||||
* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT | |||||
* LIMITED TO, THE IMPLIED WARRANTIES OF NONINFRINGEMENT, MERCHANTIBILITY | |||||
* AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL | |||||
* THE COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR 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 DAMAGES. | |||||
*/ | |||||
#include <sys/cdefs.h> | |||||
__FBSDID("$FreeBSD$"); | |||||
/* | |||||
* BHND CFE NVRAM driver. | |||||
* | |||||
* Provides access to device NVRAM via CFE. | |||||
*/ | |||||
#include <sys/param.h> | |||||
#include <sys/kernel.h> | |||||
#include <sys/bus.h> | |||||
#include <sys/limits.h> | |||||
#include <sys/malloc.h> | |||||
#include <sys/module.h> | |||||
#include <sys/systm.h> | |||||
#include <machine/bus.h> | |||||
#include <sys/rman.h> | |||||
#include <machine/resource.h> | |||||
#include <dev/bhnd/bhnd.h> | |||||
#include <dev/cfe/cfe_api.h> | |||||
#include <dev/cfe/cfe_error.h> | |||||
#include <dev/cfe/cfe_ioctl.h> | |||||
#include "bhnd_nvram_if.h" | |||||
#include "bhnd_nvramvar.h" | |||||
/** | |||||
* Default bhnd_nvram driver implementation of DEVICE_PROBE(). | |||||
*/ | |||||
int | |||||
bhnd_nvram_probe(device_t dev) | |||||
{ | |||||
device_set_desc(dev, "Broadcom NVRAM"); | |||||
/* Refuse wildcard attachments */ | |||||
return (BUS_PROBE_NOWILDCARD); | |||||
} | |||||
/** | |||||
* Call from subclass DEVICE_ATTACH() implementations to handle | |||||
* device attachment. | |||||
* | |||||
* @param dev BHND NVRAM device. | |||||
* @param data NVRAM data to be copied and parsed. No reference to data | |||||
* will be held after return. | |||||
* @param size Size of @p data, in bytes. | |||||
* @param fmt NVRAM format. | |||||
*/ | |||||
int | |||||
bhnd_nvram_attach(device_t dev, void *data, size_t size, bhnd_nvram_format fmt) | |||||
{ | |||||
struct bhnd_nvram_softc *sc; | |||||
int error; | |||||
sc = device_get_softc(dev); | |||||
sc->dev = dev; | |||||
/* Initialize NVRAM parser */ | |||||
error = bhnd_nvram_parser_init(&sc->nvram, dev, data, size, fmt); | |||||
if (error) | |||||
return (error); | |||||
/* Initialize mutex */ | |||||
BHND_NVRAM_LOCK_INIT(sc); | |||||
return (0); | |||||
} | |||||
/** | |||||
* Default bhnd_nvram driver implementation of DEVICE_RESUME(). | |||||
*/ | |||||
int | |||||
bhnd_nvram_resume(device_t dev) | |||||
{ | |||||
return (0); | |||||
} | |||||
/** | |||||
* Default bhnd_nvram driver implementation of DEVICE_SUSPEND(). | |||||
*/ | |||||
int | |||||
bhnd_nvram_suspend(device_t dev) | |||||
{ | |||||
return (0); | |||||
} | |||||
/** | |||||
* Default bhnd_nvram driver implementation of DEVICE_DETACH(). | |||||
*/ | |||||
int | |||||
bhnd_nvram_detach(device_t dev) | |||||
{ | |||||
struct bhnd_nvram_softc *sc; | |||||
sc = device_get_softc(dev); | |||||
bhnd_nvram_parser_fini(&sc->nvram); | |||||
BHND_NVRAM_LOCK_DESTROY(sc); | |||||
return (0); | |||||
} | |||||
/** | |||||
* Default bhnd_nvram driver implementation of BHND_NVRAM_GETVAR(). | |||||
*/ | |||||
static int | |||||
bhnd_nvram_getvar_method(device_t dev, const char *name, void *buf, size_t *len, | |||||
bhnd_nvram_type type) | |||||
{ | |||||
struct bhnd_nvram_softc *sc; | |||||
int error; | |||||
sc = device_get_softc(dev); | |||||
BHND_NVRAM_LOCK(sc); | |||||
error = bhnd_nvram_parser_getvar(&sc->nvram, name, buf, len, type); | |||||
BHND_NVRAM_UNLOCK(sc); | |||||
return (error); | |||||
} | |||||
/** | |||||
* Default bhnd_nvram driver implementation of BHND_NVRAM_SETVAR(). | |||||
*/ | |||||
static int | |||||
bhnd_nvram_setvar_method(device_t dev, const char *name, const void *buf, | |||||
size_t len, bhnd_nvram_type type) | |||||
{ | |||||
struct bhnd_nvram_softc *sc; | |||||
int error; | |||||
sc = device_get_softc(dev); | |||||
BHND_NVRAM_LOCK(sc); | |||||
error = bhnd_nvram_parser_setvar(&sc->nvram, name, buf, len, type); | |||||
BHND_NVRAM_UNLOCK(sc); | |||||
return (error); | |||||
} | |||||
static device_method_t bhnd_nvram_methods[] = { | |||||
/* Device interface */ | |||||
DEVMETHOD(device_probe, bhnd_nvram_probe), | |||||
DEVMETHOD(device_resume, bhnd_nvram_resume), | |||||
DEVMETHOD(device_suspend, bhnd_nvram_suspend), | |||||
DEVMETHOD(device_detach, bhnd_nvram_detach), | |||||
/* NVRAM interface */ | |||||
DEVMETHOD(bhnd_nvram_getvar, bhnd_nvram_getvar_method), | |||||
DEVMETHOD(bhnd_nvram_setvar, bhnd_nvram_setvar_method), | |||||
DEVMETHOD_END | |||||
}; | |||||
DEFINE_CLASS_0(bhnd_nvram, bhnd_nvram_driver, bhnd_nvram_methods, sizeof(struct bhnd_nvram_softc)); |