freebsd-skq/sys/dev/etherswitch/etherswitch.c

/*-
 * Copyright (c) 2011-2012 Stefan Bethke.
 * All rights reserved.
 *
 * 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.
 *
 * $FreeBSD$
 */

#include <sys/param.h>
#include <sys/bus.h>
#include <sys/conf.h>
#include <sys/fcntl.h>
#include <sys/kernel.h>
#include <sys/malloc.h>
#include <sys/module.h>
#include <sys/socket.h>
#include <sys/sx.h>
#include <sys/systm.h>
#include <sys/uio.h>

#include <net/if.h>

#include <dev/etherswitch/etherswitch.h>

#include "etherswitch_if.h"

struct etherswitch_softc {
	device_t sc_dev;
	struct cdev *sc_devnode;
};

static int etherswitch_probe(device_t);
static int etherswitch_attach(device_t);
static int etherswitch_detach(device_t);
static void etherswitch_identify(driver_t *driver, device_t parent);

devclass_t etherswitch_devclass;

static device_method_t etherswitch_methods[] = {
	/* device interface */
	DEVMETHOD(device_identify,	etherswitch_identify),
	DEVMETHOD(device_probe,		etherswitch_probe),
	DEVMETHOD(device_attach,	etherswitch_attach),
	DEVMETHOD(device_detach,	etherswitch_detach),

	DEVMETHOD_END
};

driver_t etherswitch_driver = {
	"etherswitch",
	etherswitch_methods,
	sizeof(struct etherswitch_softc),
};

static	d_ioctl_t	etherswitchioctl;

static struct cdevsw etherswitch_cdevsw = {
	.d_version =	D_VERSION,
	.d_flags =	D_TRACKCLOSE,
	.d_ioctl =	etherswitchioctl,
	.d_name =	"etherswitch",
};

static void
etherswitch_identify(driver_t *driver, device_t parent)
{
	if (device_find_child(parent, "etherswitch", -1) == NULL)
		BUS_ADD_CHILD(parent, 0, "etherswitch", -1);
}

static int
etherswitch_probe(device_t dev)
{
	device_set_desc(dev, "Switch controller");

	return (0);
}
	
static int
etherswitch_attach(device_t dev)
{
	int err;
	struct etherswitch_softc *sc;
	struct make_dev_args devargs;

	sc = device_get_softc(dev);
	sc->sc_dev = dev;
	make_dev_args_init(&devargs);
	devargs.mda_devsw = &etherswitch_cdevsw;
	devargs.mda_uid = UID_ROOT;
	devargs.mda_gid = GID_WHEEL;
	devargs.mda_mode = 0600;
	devargs.mda_si_drv1 = sc;
	err = make_dev_s(&devargs, &sc->sc_devnode, "etherswitch%d",
	    device_get_unit(dev));
	if (err != 0) {
		device_printf(dev, "failed to create character device\n");
		return (ENXIO);
	}

	return (0);
}

static int
etherswitch_detach(device_t dev)
{
	struct etherswitch_softc *sc = (struct etherswitch_softc *)device_get_softc(dev);

	if (sc->sc_devnode)
		destroy_dev(sc->sc_devnode);

	return (0);
}

static int
etherswitchioctl(struct cdev *cdev, u_long cmd, caddr_t data, int flags, struct thread *td)
{
	struct etherswitch_softc *sc = cdev->si_drv1;
	device_t dev = sc->sc_dev;
	device_t etherswitch = device_get_parent(dev);
	etherswitch_conf_t conf;
	etherswitch_info_t *info;
	etherswitch_reg_t *reg;
	etherswitch_phyreg_t *phyreg;
	int error = 0;

	switch (cmd) {
	case IOETHERSWITCHGETINFO:
		info = ETHERSWITCH_GETINFO(etherswitch);
		bcopy(info, data, sizeof(etherswitch_info_t));
		break;
		
	case IOETHERSWITCHGETREG:
		reg = (etherswitch_reg_t *)data;
		ETHERSWITCH_LOCK(etherswitch);
		reg->val = ETHERSWITCH_READREG(etherswitch, reg->reg);
		ETHERSWITCH_UNLOCK(etherswitch);
		break;
	
	case IOETHERSWITCHSETREG:
		reg = (etherswitch_reg_t *)data;
		ETHERSWITCH_LOCK(etherswitch);
		error = ETHERSWITCH_WRITEREG(etherswitch, reg->reg, reg->val);
		ETHERSWITCH_UNLOCK(etherswitch);
		break;

	case IOETHERSWITCHGETPORT:
		error = ETHERSWITCH_GETPORT(etherswitch, (etherswitch_port_t *)data);
		break;

	case IOETHERSWITCHSETPORT:
		error = ETHERSWITCH_SETPORT(etherswitch, (etherswitch_port_t *)data);
		break;

	case IOETHERSWITCHGETVLANGROUP:
		error = ETHERSWITCH_GETVGROUP(etherswitch, (etherswitch_vlangroup_t *)data);
		break;

	case IOETHERSWITCHSETVLANGROUP:
		error = ETHERSWITCH_SETVGROUP(etherswitch, (etherswitch_vlangroup_t *)data);
		break;

	case IOETHERSWITCHGETPHYREG:
		phyreg = (etherswitch_phyreg_t *)data;
		phyreg->val = ETHERSWITCH_READPHYREG(etherswitch, phyreg->phy, phyreg->reg);
		break;
	
	case IOETHERSWITCHSETPHYREG:
		phyreg = (etherswitch_phyreg_t *)data;
		error = ETHERSWITCH_WRITEPHYREG(etherswitch, phyreg->phy, phyreg->reg, phyreg->val);
		break;

	case IOETHERSWITCHGETCONF:
		bzero(&conf, sizeof(etherswitch_conf_t));
		error = ETHERSWITCH_GETCONF(etherswitch, &conf);
		bcopy(&conf, data, sizeof(etherswitch_conf_t));
		break;

	case IOETHERSWITCHSETCONF:
		error = ETHERSWITCH_SETCONF(etherswitch, (etherswitch_conf_t *)data);
		break;

	default:
		error = ENOTTY;
	}

	return (error);
}

MODULE_VERSION(etherswitch, 1);