Author: avg
Date: Fri Oct 25 16:07:24 2019
New Revision: 354079
URL: https://svnweb.freebsd.org/changeset/base/354079
Log:
superio: add a simple ioctl interface
MFC after: 1 week
Added:
head/sys/dev/superio/superio_io.h (contents, props changed)
Modified:
head/sys/dev/superio/superio.c
Modified: head/sys/dev/superio/superio.c
==============================================================================
--- head/sys/dev/superio/superio.c Fri Oct 25 15:46:54 2019
(r354078)
+++ head/sys/dev/superio/superio.c Fri Oct 25 16:07:24 2019
(r354079)
@@ -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);
@@ -913,6 +931,31 @@ superio_find_dev(device_t superio, superio_dev_type_t
return (dinfo->dev);
}
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;
Added: head/sys/dev/superio/superio_io.h
==============================================================================
--- /dev/null 00:00:00 1970 (empty, because file is newly added)
+++ head/sys/dev/superio/superio_io.h Fri Oct 25 16:07:24 2019
(r354079)
@@ -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*/
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