111 lines
2.8 KiB
C
111 lines
2.8 KiB
C
/*-
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* Copyright (c) 2008 Sam Leffler. All rights reserved.
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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 ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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/*
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* Cambria Front Panel LED sitting on the I2C bus.
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*/
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/kernel.h>
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#include <sys/module.h>
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#include <sys/bus.h>
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#include <machine/bus.h>
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#include <dev/iicbus/iiconf.h>
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#include <dev/led/led.h>
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#include "iicbus_if.h"
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#define IIC_M_WR 0 /* write operation */
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#define LED_ADDR 0xae /* slave address */
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struct fled_softc {
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struct cdev *sc_led;
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};
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static int
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fled_probe(device_t dev)
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{
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device_set_desc(dev, "Gateworks Cambria Front Panel LED");
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return 0;
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}
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static void
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fled_cb(void *arg, int onoff)
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{
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uint8_t data[1];
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struct iic_msg msgs[1] = {
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{ LED_ADDR, IIC_M_WR, 1, data },
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};
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device_t dev = arg;
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data[0] = (onoff == 0); /* NB: low true */
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(void) iicbus_transfer(dev, msgs, 1);
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}
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static int
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fled_attach(device_t dev)
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{
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struct fled_softc *sc = device_get_softc(dev);
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sc->sc_led = led_create(fled_cb, dev, "front");
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fled_cb(dev, 1); /* Turn on LED */
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return 0;
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}
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static int
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fled_detach(device_t dev)
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{
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struct fled_softc *sc = device_get_softc(dev);
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if (sc->sc_led != NULL)
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led_destroy(sc->sc_led);
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return 0;
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}
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static device_method_t fled_methods[] = {
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DEVMETHOD(device_probe, fled_probe),
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DEVMETHOD(device_attach, fled_attach),
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DEVMETHOD(device_detach, fled_detach),
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{0, 0},
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};
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static driver_t fled_driver = {
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"fled",
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fled_methods,
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sizeof(struct fled_softc),
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};
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static devclass_t fled_devclass;
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DRIVER_MODULE(fled, iicbus, fled_driver, fled_devclass, 0, 0);
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MODULE_VERSION(fled, 1);
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MODULE_DEPEND(fled, iicbus, 1, 1, 1);
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