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/*-
* Copyright (c) 2008 Sam Leffler. 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 ``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 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.
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
/*
* Cambria Front Panel LED sitting on the I2C bus.
*/
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/kernel.h>
#include <sys/module.h>
#include <sys/bus.h>
#include <machine/bus.h>
#include <dev/iicbus/iiconf.h>
#include <dev/led/led.h>
#include "iicbus_if.h"
#define IIC_M_WR 0 /* write operation */
#define LED_ADDR 0xae /* slave address */
struct fled_softc {
struct cdev *sc_led;
};
static int
fled_probe(device_t dev)
{
device_set_desc(dev, "Gateworks Cambria Front Panel LED");
return 0;
}
static void
fled_cb(void *arg, int onoff)
{
uint8_t data[1];
struct iic_msg msgs[1] = {
{ LED_ADDR, IIC_M_WR, 1, data },
};
device_t dev = arg;
data[0] = (onoff == 0); /* NB: low true */
(void) iicbus_transfer(dev, msgs, 1);
}
static int
fled_attach(device_t dev)
{
struct fled_softc *sc = device_get_softc(dev);
sc->sc_led = led_create(fled_cb, dev, "front");
fled_cb(sc, 1); /* Turn on LED */
return 0;
}
static int
fled_detach(device_t dev)
{
struct fled_softc *sc = device_get_softc(dev);
if (sc->sc_led != NULL)
led_destroy(sc->sc_led);
return 0;
}
static device_method_t fled_methods[] = {
DEVMETHOD(device_probe, fled_probe),
DEVMETHOD(device_attach, fled_attach),
DEVMETHOD(device_detach, fled_detach),
{0, 0},
};
static driver_t fled_driver = {
"fled",
fled_methods,
sizeof(struct fled_softc),
};
static devclass_t fled_devclass;
DRIVER_MODULE(fled, iicbus, fled_driver, fled_devclass, 0, 0);
MODULE_VERSION(fled, 1);
MODULE_DEPEND(fled, iicbus, 1, 1, 1);
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