119 lines
3.2 KiB
C
119 lines
3.2 KiB
C
/*-
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* Copyright (c) 2006 Kevin Lo. 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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#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 <arm/xscale/ixp425/ixp425reg.h>
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#include <arm/xscale/ixp425/ixp425var.h>
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#include <dev/led/led.h>
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#define GPIO_LED_STATUS 3
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#define GPIO_LED_STATUS_BIT (1U << GPIO_LED_STATUS)
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struct led_avila_softc {
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device_t sc_dev;
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bus_space_tag_t sc_iot;
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bus_space_handle_t sc_gpio_ioh;
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struct cdev *sc_led;
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};
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static void
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led_func(void *arg, int onoff)
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{
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struct led_avila_softc *sc = arg;
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uint32_t reg;
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IXP4XX_GPIO_LOCK();
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reg = GPIO_CONF_READ_4(sc, IXP425_GPIO_GPOUTR);
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if (onoff)
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reg &= ~GPIO_LED_STATUS_BIT;
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else
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reg |= GPIO_LED_STATUS_BIT;
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GPIO_CONF_WRITE_4(sc, IXP425_GPIO_GPOUTR, reg);
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IXP4XX_GPIO_UNLOCK();
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}
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static int
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led_avila_probe(device_t dev)
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{
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device_set_desc(dev, "Gateworks Avila Front Panel LED");
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return (0);
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}
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static int
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led_avila_attach(device_t dev)
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{
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struct led_avila_softc *sc = device_get_softc(dev);
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struct ixp425_softc *sa = device_get_softc(device_get_parent(dev));
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sc->sc_dev = dev;
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sc->sc_iot = sa->sc_iot;
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sc->sc_gpio_ioh = sa->sc_gpio_ioh;
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/* Configure LED GPIO pin as output */
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GPIO_CONF_WRITE_4(sc, IXP425_GPIO_GPOER,
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GPIO_CONF_READ_4(sc, IXP425_GPIO_GPOER) &~ GPIO_LED_STATUS_BIT);
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sc->sc_led = led_create(led_func, sc, "gpioled");
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led_func(sc, 1); /* Turn on LED */
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return (0);
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}
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static int
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led_avila_detach(device_t dev)
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{
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struct led_avila_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 led_avila_methods[] = {
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DEVMETHOD(device_probe, led_avila_probe),
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DEVMETHOD(device_attach, led_avila_attach),
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DEVMETHOD(device_detach, led_avila_detach),
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{0, 0},
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};
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static driver_t led_avila_driver = {
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"led_avila",
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led_avila_methods,
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sizeof(struct led_avila_softc),
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};
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static devclass_t led_avila_devclass;
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DRIVER_MODULE(led_avila, ixp, led_avila_driver, led_avila_devclass, 0, 0);
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