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: releng/10.3/sys/arm/xscale/ixp425/avila_led.c 215319 2010-11-14 20:41:22Z thompsa $");
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
42struct led_avila_softc {
43	device_t		sc_dev;
44	bus_space_tag_t		sc_iot;
45	bus_space_handle_t	sc_gpio_ioh;
46	struct cdev		*sc_led;
47};
48
49static void
50led_func(void *arg, int onoff)
51{
52	struct led_avila_softc *sc = arg;
53	uint32_t reg;
54
55	IXP4XX_GPIO_LOCK();
56	reg = GPIO_CONF_READ_4(sc, IXP425_GPIO_GPOUTR);
57	if (onoff)
58		reg &= ~GPIO_LED_STATUS_BIT;
59	else
60		reg |= GPIO_LED_STATUS_BIT;
61	GPIO_CONF_WRITE_4(sc, IXP425_GPIO_GPOUTR, reg);
62	IXP4XX_GPIO_UNLOCK();
63}
64
65static int
66led_avila_probe(device_t dev)
67{
68	device_set_desc(dev, "Gateworks Avila Front Panel LED");
69	return (0);
70}
71
72static int
73led_avila_attach(device_t dev)
74{
75	struct led_avila_softc *sc = device_get_softc(dev);
76	struct ixp425_softc *sa = device_get_softc(device_get_parent(dev));
77
78	sc->sc_dev = dev;
79	sc->sc_iot = sa->sc_iot;
80	sc->sc_gpio_ioh = sa->sc_gpio_ioh;
81
82	/* Configure LED GPIO pin as output */
83	GPIO_CONF_WRITE_4(sc, IXP425_GPIO_GPOER,
84	    GPIO_CONF_READ_4(sc, IXP425_GPIO_GPOER) &~ GPIO_LED_STATUS_BIT);
85
86	sc->sc_led = led_create(led_func, sc, "gpioled");
87
88	led_func(sc, 1);		/* Turn on LED */
89
90	return (0);
91}
92
93static int
94led_avila_detach(device_t dev)
95{
96	struct led_avila_softc *sc = device_get_softc(dev);
97
98	if (sc->sc_led != NULL)
99		led_destroy(sc->sc_led);
100	return (0);
101}
102
103static device_method_t led_avila_methods[] = {
104	DEVMETHOD(device_probe,		led_avila_probe),
105	DEVMETHOD(device_attach,	led_avila_attach),
106	DEVMETHOD(device_detach,	led_avila_detach),
107
108	{0, 0},
109};
110
111static driver_t led_avila_driver = {
112	"led_avila",
113	led_avila_methods,
114	sizeof(struct led_avila_softc),
115};
116static devclass_t led_avila_devclass;
117
118DRIVER_MODULE(led_avila, ixp, led_avila_driver, led_avila_devclass, 0, 0);
119