123 lines
3.1 KiB
C
123 lines
3.1 KiB
C
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/*-
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* Copyright (c) 2015 Oleksandr Tymoshenko <gonzo@freebsd.org>
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/kernel.h>
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#include <sys/malloc.h>
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#include <sys/module.h>
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#include <sys/ioccom.h>
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#include <sys/conf.h>
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#include <sys/proc.h>
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#include <arm/broadcom/bcm2835/bcm2835_mbox_prop.h>
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MALLOC_DECLARE(M_VCIO);
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MALLOC_DEFINE(M_VCIO, "vcio", "VCIO temporary buffers");
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static struct cdev *sdev;
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static d_ioctl_t vcio_ioctl;
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static struct cdevsw vcio_devsw = {
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/* version */ .d_version = D_VERSION,
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/* ioctl */ .d_ioctl = vcio_ioctl,
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};
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#define VCIO_IOC_MAGIC 100
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#define IOCTL_MBOX_PROPERTY _IOWR(VCIO_IOC_MAGIC, 0, char *)
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int
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vcio_ioctl(struct cdev *dev, u_long cmd, caddr_t arg, int mode,
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struct thread *td)
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{
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int error;
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void *ptr;
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uint32_t size;
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uint8_t *property;
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error = 0;
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switch(cmd) {
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case IOCTL_MBOX_PROPERTY:
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memcpy (&ptr, arg, sizeof(ptr));
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error = copyin(ptr, &size, sizeof(size));
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if (error != 0)
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break;
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property = malloc(size, M_VCIO, M_WAITOK);
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if (property == NULL) {
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error = ENOMEM;
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break;
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}
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error = copyin(ptr, property, size);
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if (error) {
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free(property, M_VCIO);
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break;
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}
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error = bcm2835_mbox_property(property, size);
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if (error) {
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free(property, M_VCIO);
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break;
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}
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error = copyout(property, ptr, size);
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free(property, M_VCIO);
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break;
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default:
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error = EINVAL;
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break;
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}
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return (error);
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}
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static int
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vcio_load(module_t mod, int cmd, void *arg)
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{
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int err = 0;
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switch (cmd) {
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case MOD_LOAD:
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sdev = make_dev(&vcio_devsw, 0, UID_ROOT, GID_WHEEL, 0600, "vcio");
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break;
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case MOD_UNLOAD:
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destroy_dev(sdev);
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break;
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default:
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err = EOPNOTSUPP;
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break;
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}
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return(err);
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}
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DEV_MODULE(vcio, vcio_load, NULL);
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MODULE_DEPEND(vcio, mbox, 1, 1, 1);
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