1 /*-
2 * Copyright (c) 2008 Sam Leffler. 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/8.4/sys/arm/xscale/ixp425/cambria_fled.c 186352 2008-12-20 03:26:09Z sam $");
27 /*
28 * Cambria Front Panel LED sitting on the I2C bus.
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 <machine/bus.h>
37
38 #include <dev/iicbus/iiconf.h>
39 #include <dev/led/led.h>
40
41 #include "iicbus_if.h"
42
43 #define IIC_M_WR 0 /* write operation */
44 #define LED_ADDR 0xae /* slave address */
45
46 struct fled_softc {
47 struct cdev *sc_led;
48 };
49
50 static int
51 fled_probe(device_t dev)
52 {
53 device_set_desc(dev, "Gateworks Cambria Front Panel LED");
54 return 0;
55 }
56
57 static void
58 fled_cb(void *arg, int onoff)
59 {
60 uint8_t data[1];
61 struct iic_msg msgs[1] = {
62 { LED_ADDR, IIC_M_WR, 1, data },
63 };
64 device_t dev = arg;
65
66 data[0] = (onoff == 0); /* NB: low true */
67 (void) iicbus_transfer(dev, msgs, 1);
68 }
69
70 static int
71 fled_attach(device_t dev)
72 {
73 struct fled_softc *sc = device_get_softc(dev);
74
75 sc->sc_led = led_create(fled_cb, dev, "front");
76
77 return 0;
78 }
79
80 static int
81 fled_detach(device_t dev)
82 {
83 struct fled_softc *sc = device_get_softc(dev);
84
85 if (sc->sc_led != NULL)
86 led_destroy(sc->sc_led);
87
88 return 0;
89 }
90
91 static device_method_t fled_methods[] = {
92 DEVMETHOD(device_probe, fled_probe),
93 DEVMETHOD(device_attach, fled_attach),
94 DEVMETHOD(device_detach, fled_detach),
95
96 {0, 0},
97 };
98
99 static driver_t fled_driver = {
100 "fled",
101 fled_methods,
102 sizeof(struct fled_softc),
103 };
104 static devclass_t fled_devclass;
105
106 DRIVER_MODULE(fled, iicbus, fled_driver, fled_devclass, 0, 0);
107 MODULE_VERSION(fled, 1);
108 MODULE_DEPEND(fled, iicbus, 1, 1, 1);
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