1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
|
/*-
* Copyright (c) 2008 Sam Leffler. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
/*
* Gateworks Cambria Octal LED Latch driver.
*/
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/kernel.h>
#include <sys/module.h>
#include <sys/bus.h>
#include <machine/armreg.h>
#include <arm/xscale/ixp425/ixp425reg.h>
#include <arm/xscale/ixp425/ixp425var.h>
#include <dev/led/led.h>
struct led_softc {
device_t sc_dev;
bus_space_tag_t sc_iot;
bus_space_handle_t sc_ioh;
struct cdev *sc_leds[8];
uint8_t sc_latch;
};
static void
update_latch(struct led_softc *sc, int bit, int onoff)
{
if (onoff)
sc->sc_latch &= ~bit;
else
sc->sc_latch |= bit;
bus_space_write_1(sc->sc_iot, sc->sc_ioh, 0, sc->sc_latch);
}
static void led_A(void *arg, int onoff) { update_latch(arg, 1<<0, onoff); }
static void led_B(void *arg, int onoff) { update_latch(arg, 1<<1, onoff); }
static void led_C(void *arg, int onoff) { update_latch(arg, 1<<2, onoff); }
static void led_D(void *arg, int onoff) { update_latch(arg, 1<<3, onoff); }
static void led_E(void *arg, int onoff) { update_latch(arg, 1<<4, onoff); }
static void led_F(void *arg, int onoff) { update_latch(arg, 1<<5, onoff); }
static void led_G(void *arg, int onoff) { update_latch(arg, 1<<6, onoff); }
static void led_H(void *arg, int onoff) { update_latch(arg, 1<<7, onoff); }
static int
led_probe(device_t dev)
{
device_set_desc(dev, "Gateworks Octal LED Latch");
return (0);
}
static int
led_attach(device_t dev)
{
struct led_softc *sc = device_get_softc(dev);
struct ixp425_softc *sa = device_get_softc(device_get_parent(dev));
sc->sc_dev = dev;
sc->sc_iot = sa->sc_iot;
/* NB: write anywhere works, use first location */
if (bus_space_map(sc->sc_iot, CAMBRIA_OCTAL_LED_HWBASE, sizeof(uint8_t),
0, &sc->sc_ioh)) {
device_printf(dev, "cannot map LED latch (0x%lx)",
CAMBRIA_OCTAL_LED_HWBASE);
return ENXIO;
}
sc->sc_leds[0] = led_create(led_A, sc, "A");
sc->sc_leds[1] = led_create(led_B, sc, "B");
sc->sc_leds[2] = led_create(led_C, sc, "C");
sc->sc_leds[3] = led_create(led_D, sc, "D");
sc->sc_leds[4] = led_create(led_E, sc, "E");
sc->sc_leds[5] = led_create(led_F, sc, "F");
sc->sc_leds[6] = led_create(led_G, sc, "G");
sc->sc_leds[7] = led_create(led_H, sc, "H");
return 0;
}
static void
led_detach(device_t dev)
{
struct led_softc *sc = device_get_softc(dev);
int i;
for (i = 0; i < 8; i++) {
struct cdev *led = sc->sc_leds[i];
if (led != NULL)
led_destroy(led);
}
}
static device_method_t led_methods[] = {
DEVMETHOD(device_probe, led_probe),
DEVMETHOD(device_attach, led_attach),
DEVMETHOD(device_attach, led_detach),
{0, 0},
};
static driver_t led_driver = {
"led_cambria",
led_methods,
sizeof(struct led_softc),
};
static devclass_t led_devclass;
DRIVER_MODULE(led_cambria, ixp, led_driver, led_devclass, 0, 0);
|
