avila_led.c revision 164508 
1/*-
2 * Copyright (c) 2006 Kevin Lo.  All rights reserved.
3 *
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions
6 * are met:
7 * 1. Redistributions of source code must retain the above copyright
8 *    notice, this list of conditions and the following disclaimer.
9 * 2. Redistributions in binary form must reproduce the above copyright
10 *    notice, this list of conditions and the following disclaimer in the
11 *    documentation and/or other materials provided with the distribution.
12 *
13 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
14 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
15 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
16 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
17 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
18 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
19 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
20 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
21 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
22 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
23 */
24
25#include <sys/cdefs.h>
26__FBSDID("$FreeBSD: head/sys/arm/xscale/ixp425/avila_led.c 164508 2006-11-22 12:57:17Z kevlo $");
27
28#include <sys/param.h>
29#include <sys/systm.h>
30#include <sys/kernel.h>
31#include <sys/module.h>
32#include <sys/bus.h>
33
34#include <arm/xscale/ixp425/ixp425reg.h>
35#include <arm/xscale/ixp425/ixp425var.h>
36
37#include <dev/led/led.h>
38
39#define	GPIO_LED_STATUS	3
40#define	  GPIO_LED_STATUS_BIT	(1U << GPIO_LED_STATUS)
41
42static struct cdev *gpioled;
43
44struct led_avila_softc {
45	device_t		sc_dev;
46	bus_space_tag_t		sc_iot;
47	bus_space_handle_t	sc_gpio_ioh;
48};
49
50static struct led_avila_softc *led_avila_sc = NULL;
51
52static void
53led_func(void *unused, int onoff)
54{
55	struct led_avila_softc *sc = led_avila_sc;
56	uint32_t reg;
57
58	reg = GPIO_CONF_READ_4(sc, IXP425_GPIO_GPOUTR);
59	if (onoff)
60		reg &= ~GPIO_LED_STATUS_BIT;
61	else
62		reg |= GPIO_LED_STATUS_BIT;
63	GPIO_CONF_WRITE_4(sc, IXP425_GPIO_GPOUTR, reg);
64}
65
66static int
67led_avila_probe(device_t dev)
68{
69	device_set_desc(dev, "Gateworks Avila GPIO connected LED");
70	return (0);
71}
72
73static int
74led_avila_attach(device_t dev)
75{
76	struct led_avila_softc *sc = device_get_softc(dev);
77	struct ixp425_softc *sa = device_get_softc(device_get_parent(dev));
78	void *led = NULL;
79	uint32_t reg;
80
81	led_avila_sc = sc;
82
83	sc->sc_dev = dev;
84	sc->sc_iot = sa->sc_iot;
85	sc->sc_gpio_ioh = sa->sc_gpio_ioh;
86
87	/* Configure LED GPIO pin as output */
88	reg = GPIO_CONF_READ_4(sc, IXP425_GPIO_GPOER);
89	reg &= ~GPIO_LED_STATUS_BIT;
90	GPIO_CONF_WRITE_4(sc, IXP425_GPIO_GPOER, reg);
91
92	gpioled = led_create(led_func, led, "gpioled");
93
94	/* Turn on LED */
95	led_func(led, 1);
96
97	return (0);
98}
99
100static device_method_t led_avila_methods[] = {
101	DEVMETHOD(device_probe,		led_avila_probe),
102	DEVMETHOD(device_attach,	led_avila_attach),
103
104	{0, 0},
105};
106
107static driver_t led_avila_driver = {
108	"led_avila",
109	led_avila_methods,
110	sizeof(struct led_avila_softc),
111};
112static devclass_t led_avila_devclass;
113
114DRIVER_MODULE(led_avila, ixp, led_avila_driver, led_avila_devclass, 0, 0);
115