superio: add a simple ioctl interface
MFC after: 1 week
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parent
dbb15ea500
commit
0aee3bdc56
sys/dev/superio
@ -50,6 +50,7 @@ __FBSDID("$FreeBSD$");
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#include <isa/isavar.h>
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#include <dev/superio/superio.h>
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#include <dev/superio/superio_io.h>
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#include "isa_if.h"
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@ -84,6 +85,7 @@ struct siosc {
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struct mtx conf_lock;
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STAILQ_HEAD(, superio_devinfo) devlist;
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struct resource* io_res;
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struct cdev *chardev;
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int io_rid;
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uint16_t io_port;
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const struct sio_conf_methods *methods;
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@ -96,6 +98,14 @@ struct siosc {
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uint8_t enable_reg;
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};
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static d_ioctl_t superio_ioctl;
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static struct cdevsw superio_cdevsw = {
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.d_version = D_VERSION,
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.d_ioctl = superio_ioctl,
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.d_name = "superio",
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};
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#define NUMPORTS 2
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static uint8_t
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@ -621,6 +631,12 @@ superio_attach(device_t dev)
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bus_generic_probe(dev);
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bus_generic_attach(dev);
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sc->chardev = make_dev(&superio_cdevsw, device_get_unit(dev),
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UID_ROOT, GID_WHEEL, 0600, "superio%d", device_get_unit(dev));
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if (sc->chardev == NULL)
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device_printf(dev, "failed to create character device\n");
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sc->chardev->si_drv1 = sc;
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return (0);
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}
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@ -633,6 +649,8 @@ superio_detach(device_t dev)
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error = bus_generic_detach(dev);
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if (error != 0)
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return (error);
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if (sc->chardev != NULL)
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destroy_dev(sc->chardev);
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device_delete_children(dev);
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bus_release_resource(dev, SYS_RES_IOPORT, sc->io_rid, sc->io_res);
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mtx_destroy(&sc->conf_lock);
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@ -915,6 +933,31 @@ superio_find_dev(device_t superio, superio_dev_type_t type, int ldn)
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return (NULL);
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}
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static int
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superio_ioctl(struct cdev *dev, u_long cmd, caddr_t data, int flags,
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struct thread *td)
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{
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struct siosc *sc;
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struct superiocmd *s;
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sc = dev->si_drv1;
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s = (struct superiocmd *)data;
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switch (cmd) {
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case SUPERIO_CR_READ:
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sio_conf_enter(sc);
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s->val = sio_ldn_read(sc, s->ldn, s->cr);
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sio_conf_exit(sc);
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return (0);
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case SUPERIO_CR_WRITE:
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sio_conf_enter(sc);
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sio_ldn_write(sc, s->ldn, s->cr, s->val);
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sio_conf_exit(sc);
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return (0);
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default:
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return (ENOTTY);
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}
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}
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static devclass_t superio_devclass;
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static device_method_t superio_methods[] = {
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42
sys/dev/superio/superio_io.h
Normal file
42
sys/dev/superio/superio_io.h
Normal file
@ -0,0 +1,42 @@
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/*
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* Copyright (c) 2019 Andriy Gapon
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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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* $FreeBSD$
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*/
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#ifndef SUPERIO_IO_H
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#define SUPERIO_IO_H
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#include <sys/types.h>
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struct superiocmd {
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uint8_t ldn;
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uint8_t cr;
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uint8_t val;
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};
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#define SUPERIO_CR_READ _IOWR('s', 0, struct superiocmd)
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#define SUPERIO_CR_WRITE _IOW('s', 1, struct superiocmd)
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#endif /*SUPERIO_IO_H*/
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