superio: add a simple ioctl interface

MFC after:	1 week
This commit is contained in:
Andriy Gapon 2019-10-25 16:07:24 +00:00
parent dbb15ea500
commit 0aee3bdc56
2 changed files with 85 additions and 0 deletions
sys/dev/superio

@ -50,6 +50,7 @@ __FBSDID("$FreeBSD$");
#include <isa/isavar.h>
#include <dev/superio/superio.h>
#include <dev/superio/superio_io.h>
#include "isa_if.h"
@ -84,6 +85,7 @@ struct siosc {
struct mtx conf_lock;
STAILQ_HEAD(, superio_devinfo) devlist;
struct resource* io_res;
struct cdev *chardev;
int io_rid;
uint16_t io_port;
const struct sio_conf_methods *methods;
@ -96,6 +98,14 @@ struct siosc {
uint8_t enable_reg;
};
static d_ioctl_t superio_ioctl;
static struct cdevsw superio_cdevsw = {
.d_version = D_VERSION,
.d_ioctl = superio_ioctl,
.d_name = "superio",
};
#define NUMPORTS 2
static uint8_t
@ -621,6 +631,12 @@ superio_attach(device_t dev)
bus_generic_probe(dev);
bus_generic_attach(dev);
sc->chardev = make_dev(&superio_cdevsw, device_get_unit(dev),
UID_ROOT, GID_WHEEL, 0600, "superio%d", device_get_unit(dev));
if (sc->chardev == NULL)
device_printf(dev, "failed to create character device\n");
sc->chardev->si_drv1 = sc;
return (0);
}
@ -633,6 +649,8 @@ superio_detach(device_t dev)
error = bus_generic_detach(dev);
if (error != 0)
return (error);
if (sc->chardev != NULL)
destroy_dev(sc->chardev);
device_delete_children(dev);
bus_release_resource(dev, SYS_RES_IOPORT, sc->io_rid, sc->io_res);
mtx_destroy(&sc->conf_lock);
@ -915,6 +933,31 @@ superio_find_dev(device_t superio, superio_dev_type_t type, int ldn)
return (NULL);
}
static int
superio_ioctl(struct cdev *dev, u_long cmd, caddr_t data, int flags,
struct thread *td)
{
struct siosc *sc;
struct superiocmd *s;
sc = dev->si_drv1;
s = (struct superiocmd *)data;
switch (cmd) {
case SUPERIO_CR_READ:
sio_conf_enter(sc);
s->val = sio_ldn_read(sc, s->ldn, s->cr);
sio_conf_exit(sc);
return (0);
case SUPERIO_CR_WRITE:
sio_conf_enter(sc);
sio_ldn_write(sc, s->ldn, s->cr, s->val);
sio_conf_exit(sc);
return (0);
default:
return (ENOTTY);
}
}
static devclass_t superio_devclass;
static device_method_t superio_methods[] = {

@ -0,0 +1,42 @@
/*
* Copyright (c) 2019 Andriy Gapon
*
* 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.
*
* $FreeBSD$
*/
#ifndef SUPERIO_IO_H
#define SUPERIO_IO_H
#include <sys/types.h>
struct superiocmd {
uint8_t ldn;
uint8_t cr;
uint8_t val;
};
#define SUPERIO_CR_READ _IOWR('s', 0, struct superiocmd)
#define SUPERIO_CR_WRITE _IOW('s', 1, struct superiocmd)
#endif /*SUPERIO_IO_H*/