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freebsd/sys/arm/xscale/ixp425/cambria_led.c
Andriy Gapon 08d43f8e62 strict kobj signatures: number of fixes for arm architecture
no functional changes should result

Reviewed by:	imp, current@
Approved by:	jhb (mentor)
2009-06-11 17:05:13 +00:00

134 lines
4.0 KiB
C

/*-
* 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("$FreeBSD$");
/*
* Gateworks Cambria Octal LED Latch driver.
*/
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/kernel.h>
#include <sys/module.h>
#include <sys/bus.h>
#include <machine/armreg.h>
#include <arm/xscale/ixp425/ixp425reg.h>
#include <arm/xscale/ixp425/ixp425var.h>
#include <dev/led/led.h>
struct led_softc {
device_t sc_dev;
bus_space_tag_t sc_iot;
bus_space_handle_t sc_ioh;
struct cdev *sc_leds[8];
uint8_t sc_latch;
};
static void
update_latch(struct led_softc *sc, int bit, int onoff)
{
if (onoff)
sc->sc_latch &= ~bit;
else
sc->sc_latch |= bit;
bus_space_write_1(sc->sc_iot, sc->sc_ioh, 0, sc->sc_latch);
}
static void led_A(void *arg, int onoff) { update_latch(arg, 1<<0, onoff); }
static void led_B(void *arg, int onoff) { update_latch(arg, 1<<1, onoff); }
static void led_C(void *arg, int onoff) { update_latch(arg, 1<<2, onoff); }
static void led_D(void *arg, int onoff) { update_latch(arg, 1<<3, onoff); }
static void led_E(void *arg, int onoff) { update_latch(arg, 1<<4, onoff); }
static void led_F(void *arg, int onoff) { update_latch(arg, 1<<5, onoff); }
static void led_G(void *arg, int onoff) { update_latch(arg, 1<<6, onoff); }
static void led_H(void *arg, int onoff) { update_latch(arg, 1<<7, onoff); }
static int
led_probe(device_t dev)
{
device_set_desc(dev, "Gateworks Octal LED Latch");
return (0);
}
static int
led_attach(device_t dev)
{
struct led_softc *sc = device_get_softc(dev);
struct ixp425_softc *sa = device_get_softc(device_get_parent(dev));
sc->sc_dev = dev;
sc->sc_iot = sa->sc_iot;
/* NB: write anywhere works, use first location */
if (bus_space_map(sc->sc_iot, CAMBRIA_OCTAL_LED_HWBASE, sizeof(uint8_t),
0, &sc->sc_ioh)) {
device_printf(dev, "cannot map LED latch (0x%lx)",
CAMBRIA_OCTAL_LED_HWBASE);
return ENXIO;
}
sc->sc_leds[0] = led_create(led_A, sc, "A");
sc->sc_leds[1] = led_create(led_B, sc, "B");
sc->sc_leds[2] = led_create(led_C, sc, "C");
sc->sc_leds[3] = led_create(led_D, sc, "D");
sc->sc_leds[4] = led_create(led_E, sc, "E");
sc->sc_leds[5] = led_create(led_F, sc, "F");
sc->sc_leds[6] = led_create(led_G, sc, "G");
sc->sc_leds[7] = led_create(led_H, sc, "H");
return 0;
}
static int
led_detach(device_t dev)
{
struct led_softc *sc = device_get_softc(dev);
int i;
for (i = 0; i < 8; i++) {
struct cdev *led = sc->sc_leds[i];
if (led != NULL)
led_destroy(led);
}
return (0);
}
static device_method_t led_methods[] = {
DEVMETHOD(device_probe, led_probe),
DEVMETHOD(device_attach, led_attach),
DEVMETHOD(device_detach, led_detach),
{0, 0},
};
static driver_t led_driver = {
"led_cambria",
led_methods,
sizeof(struct led_softc),
};
static devclass_t led_devclass;
DRIVER_MODULE(led_cambria, ixp, led_driver, led_devclass, 0, 0);