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/*-
* Copyright (c) 2015 Oleksandr Tymoshenko <gonzo@freebsd.org>
*
* 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.
* 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 AND CONTRIBUTORS ``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 OR CONTRIBUTORS 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.
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/kernel.h>
#include <sys/malloc.h>
#include <sys/module.h>
#include <sys/ioccom.h>
#include <sys/conf.h>
#include <sys/proc.h>
#include <arm/broadcom/bcm2835/bcm2835_mbox_prop.h>
MALLOC_DECLARE(M_VCIO);
MALLOC_DEFINE(M_VCIO, "vcio", "VCIO temporary buffers");
static struct cdev *sdev;
static d_ioctl_t vcio_ioctl;
static struct cdevsw vcio_devsw = {
/* version */ .d_version = D_VERSION,
/* ioctl */ .d_ioctl = vcio_ioctl,
};
#define VCIO_IOC_MAGIC 100
#define IOCTL_MBOX_PROPERTY _IOWR(VCIO_IOC_MAGIC, 0, char *)
int
vcio_ioctl(struct cdev *dev, u_long cmd, caddr_t arg, int mode,
struct thread *td)
{
int error;
void *ptr;
uint32_t size;
uint8_t *property;
error = 0;
switch(cmd) {
case IOCTL_MBOX_PROPERTY:
memcpy (&ptr, arg, sizeof(ptr));
error = copyin(ptr, &size, sizeof(size));
if (error != 0)
break;
property = malloc(size, M_VCIO, M_WAITOK);
error = copyin(ptr, property, size);
if (error) {
free(property, M_VCIO);
break;
}
error = bcm2835_mbox_property(property, size);
if (error) {
free(property, M_VCIO);
break;
}
error = copyout(property, ptr, size);
free(property, M_VCIO);
break;
default:
error = EINVAL;
break;
}
return (error);
}
static int
vcio_load(module_t mod, int cmd, void *arg)
{
int err = 0;
switch (cmd) {
case MOD_LOAD:
sdev = make_dev(&vcio_devsw, 0, UID_ROOT, GID_WHEEL, 0600, "vcio");
break;
case MOD_UNLOAD:
destroy_dev(sdev);
break;
default:
err = EOPNOTSUPP;
break;
}
return(err);
}
DEV_MODULE(vcio, vcio_load, NULL);
MODULE_DEPEND(vcio, mbox, 1, 1, 1);
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