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 static struct cdev *gpioled;
43
44 struct 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
50 static struct led_avila_softc *led_avila_sc = NULL;
51
52 static void
53 led_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
66 static int
67 led_avila_probe(device_t dev)
68 {
69 device_set_desc(dev, "Gateworks Avila GPIO connected LED");
70 return (0);
71 }
72
73 static int
74 led_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
100 static 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
107 static driver_t led_avila_driver = {
108 "led_avila",
109 led_avila_methods,
110 sizeof(struct led_avila_softc),
111 };
112 static devclass_t led_avila_devclass;
113
114 DRIVER_MODULE(led_avila, ixp, led_avila_driver, led_avila_devclass, 0, 0);
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