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134 lines
4.0 KiB
C
134 lines
4.0 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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* Gateworks Cambria Octal LED Latch driver.
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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/armreg.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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struct led_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_ioh;
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struct cdev *sc_leds[8];
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uint8_t sc_latch;
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};
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static void
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update_latch(struct led_softc *sc, int bit, int onoff)
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{
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if (onoff)
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sc->sc_latch &= ~bit;
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else
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sc->sc_latch |= bit;
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bus_space_write_1(sc->sc_iot, sc->sc_ioh, 0, sc->sc_latch);
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}
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static void led_A(void *arg, int onoff) { update_latch(arg, 1<<0, onoff); }
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static void led_B(void *arg, int onoff) { update_latch(arg, 1<<1, onoff); }
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static void led_C(void *arg, int onoff) { update_latch(arg, 1<<2, onoff); }
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static void led_D(void *arg, int onoff) { update_latch(arg, 1<<3, onoff); }
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static void led_E(void *arg, int onoff) { update_latch(arg, 1<<4, onoff); }
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static void led_F(void *arg, int onoff) { update_latch(arg, 1<<5, onoff); }
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static void led_G(void *arg, int onoff) { update_latch(arg, 1<<6, onoff); }
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static void led_H(void *arg, int onoff) { update_latch(arg, 1<<7, onoff); }
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static int
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led_probe(device_t dev)
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{
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device_set_desc(dev, "Gateworks Octal LED Latch");
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return (0);
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}
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static int
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led_attach(device_t dev)
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{
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struct led_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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/* NB: write anywhere works, use first location */
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if (bus_space_map(sc->sc_iot, CAMBRIA_OCTAL_LED_HWBASE, sizeof(uint8_t),
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0, &sc->sc_ioh)) {
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device_printf(dev, "cannot map LED latch (0x%lx)",
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CAMBRIA_OCTAL_LED_HWBASE);
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return ENXIO;
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}
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sc->sc_leds[0] = led_create(led_A, sc, "A");
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sc->sc_leds[1] = led_create(led_B, sc, "B");
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sc->sc_leds[2] = led_create(led_C, sc, "C");
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sc->sc_leds[3] = led_create(led_D, sc, "D");
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sc->sc_leds[4] = led_create(led_E, sc, "E");
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sc->sc_leds[5] = led_create(led_F, sc, "F");
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sc->sc_leds[6] = led_create(led_G, sc, "G");
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sc->sc_leds[7] = led_create(led_H, sc, "H");
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return 0;
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}
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static int
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led_detach(device_t dev)
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{
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struct led_softc *sc = device_get_softc(dev);
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int i;
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for (i = 0; i < 8; i++) {
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struct cdev *led = sc->sc_leds[i];
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if (led != NULL)
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led_destroy(led);
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}
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return (0);
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}
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static device_method_t led_methods[] = {
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DEVMETHOD(device_probe, led_probe),
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DEVMETHOD(device_attach, led_attach),
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DEVMETHOD(device_detach, led_detach),
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{0, 0},
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};
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static driver_t led_driver = {
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"led_cambria",
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led_methods,
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sizeof(struct led_softc),
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};
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static devclass_t led_devclass;
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DRIVER_MODULE(led_cambria, ixp, led_driver, led_devclass, 0, 0);
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