avila_led.c revision 330897 
1/*-
2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
3 *
4 * Copyright (c) 2006 Kevin Lo.  All rights reserved.
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
8 * are met:
9 * 1. Redistributions of source code must retain the above copyright
10 *    notice, this list of conditions and the following disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 *    notice, this list of conditions and the following disclaimer in the
13 *    documentation and/or other materials provided with the distribution.
14 *
15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
16 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
17 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
18 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
19 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
20 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
21 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
22 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
23 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
24 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
25 */
26
27#include <sys/cdefs.h>
28__FBSDID("$FreeBSD: stable/11/sys/arm/xscale/ixp425/avila_led.c 330897 2018-03-14 03:19:51Z eadler $");
29
30#include <sys/param.h>
31#include <sys/systm.h>
32#include <sys/kernel.h>
33#include <sys/module.h>
34#include <sys/bus.h>
35
36#include <arm/xscale/ixp425/ixp425reg.h>
37#include <arm/xscale/ixp425/ixp425var.h>
38
39#include <dev/led/led.h>
40
41#define	GPIO_LED_STATUS	3
42#define	GPIO_LED_STATUS_BIT	(1U << GPIO_LED_STATUS)
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	struct cdev		*sc_led;
49};
50
51static void
52led_func(void *arg, int onoff)
53{
54	struct led_avila_softc *sc = arg;
55	uint32_t reg;
56
57	IXP4XX_GPIO_LOCK();
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	IXP4XX_GPIO_UNLOCK();
65}
66
67static int
68led_avila_probe(device_t dev)
69{
70	device_set_desc(dev, "Gateworks Avila Front Panel LED");
71	return (0);
72}
73
74static int
75led_avila_attach(device_t dev)
76{
77	struct led_avila_softc *sc = device_get_softc(dev);
78	struct ixp425_softc *sa = device_get_softc(device_get_parent(dev));
79
80	sc->sc_dev = dev;
81	sc->sc_iot = sa->sc_iot;
82	sc->sc_gpio_ioh = sa->sc_gpio_ioh;
83
84	/* Configure LED GPIO pin as output */
85	GPIO_CONF_WRITE_4(sc, IXP425_GPIO_GPOER,
86	    GPIO_CONF_READ_4(sc, IXP425_GPIO_GPOER) &~ GPIO_LED_STATUS_BIT);
87
88	sc->sc_led = led_create(led_func, sc, "gpioled");
89
90	led_func(sc, 1);		/* Turn on LED */
91
92	return (0);
93}
94
95static int
96led_avila_detach(device_t dev)
97{
98	struct led_avila_softc *sc = device_get_softc(dev);
99
100	if (sc->sc_led != NULL)
101		led_destroy(sc->sc_led);
102	return (0);
103}
104
105static device_method_t led_avila_methods[] = {
106	DEVMETHOD(device_probe,		led_avila_probe),
107	DEVMETHOD(device_attach,	led_avila_attach),
108	DEVMETHOD(device_detach,	led_avila_detach),
109
110	{0, 0},
111};
112
113static driver_t led_avila_driver = {
114	"led_avila",
115	led_avila_methods,
116	sizeof(struct led_avila_softc),
117};
118static devclass_t led_avila_devclass;
119
120DRIVER_MODULE(led_avila, ixp, led_avila_driver, led_avila_devclass, 0, 0);
121