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("$FreeBSD$");
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
42 struct 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
49 static void
led_func(void * arg,int onoff)50 led_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
65 static int
led_avila_probe(device_t dev)66 led_avila_probe(device_t dev)
67 {
68 device_set_desc(dev, "Gateworks Avila Front Panel LED");
69 return (0);
70 }
71
72 static int
led_avila_attach(device_t dev)73 led_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
93 static int
led_avila_detach(device_t dev)94 led_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
103 static 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
111 static driver_t led_avila_driver = {
112 "led_avila",
113 led_avila_methods,
114 sizeof(struct led_avila_softc),
115 };
116 static devclass_t led_avila_devclass;
117
118 DRIVER_MODULE(led_avila, ixp, led_avila_driver, led_avila_devclass, 0, 0);
119