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
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
|
/* $NetBSD: gpiolock.c,v 1.5 2017/10/28 04:53:56 riastradh Exp $ */
/*
* Copyright (c) 2009 Marc Balmer <marc@msys.ch>
* 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.
*/
/*
* Driver for multi-position keylocks on GPIO pins
*/
#include "opt_keylock.h"
#include <sys/param.h>
#include <sys/device.h>
#include <sys/gpio.h>
#include <dev/gpio/gpiovar.h>
#include <dev/keylock.h>
#include "ioconf.h"
#define GPIOLOCK_MAXPINS 4
#define GPIOLOCK_MINPINS 2
struct gpiolock_softc {
void * sc_gpio;
struct gpio_pinmap sc_map;
int _map[GPIOLOCK_MAXPINS];
int sc_npins;
int sc_data;
int sc_dying;
};
int gpiolock_match(device_t, cfdata_t, void *);
void gpiolock_attach(device_t, device_t, void *);
int gpiolock_detach(device_t, int);
int gpiolock_activate(device_t, enum devact);
int gpiolock_position(void *);
CFATTACH_DECL_NEW(gpiolock, sizeof(struct gpiolock_softc),
gpiolock_match, gpiolock_attach, gpiolock_detach, gpiolock_activate);
int
gpiolock_match(device_t parent, cfdata_t cf,
void *aux)
{
struct gpio_attach_args *ga = aux;
int npins;
if (strcmp(ga->ga_dvname, cf->cf_name))
return 0;
if (ga->ga_offset == -1)
return 0;
/* Check number of pins */
npins = gpio_npins(ga->ga_mask);
if (npins < GPIOLOCK_MINPINS || npins > GPIOLOCK_MAXPINS) {
aprint_debug("%s: invalid pin mask 0x%02x\n", cf->cf_name,
ga->ga_mask);
return 0;
}
return 1;
}
void
gpiolock_attach(device_t parent, device_t self, void *aux)
{
struct gpiolock_softc *sc = device_private(self);
struct gpio_attach_args *ga = aux;
int pin, caps;
sc->sc_npins = gpio_npins(ga->ga_mask);
/* Map pins */
sc->sc_gpio = ga->ga_gpio;
sc->sc_map.pm_map = sc->_map;
if (gpio_pin_map(sc->sc_gpio, ga->ga_offset, ga->ga_mask,
&sc->sc_map)) {
aprint_error(": can't map pins\n");
return;
}
/* Configure data pins */
for (pin = 0; pin < sc->sc_npins; pin++) {
caps = gpio_pin_caps(sc->sc_gpio, &sc->sc_map, pin);
if (!(caps & GPIO_PIN_INPUT)) {
aprint_error(": data pin is unable to read input\n");
goto fail;
}
aprint_normal(" [%d]", sc->sc_map.pm_map[pin]);
sc->sc_data = GPIO_PIN_INPUT;
gpio_pin_ctl(sc->sc_gpio, &sc->sc_map, pin, sc->sc_data);
}
#ifdef KEYLOCK
/* Register keylock */
if (keylock_register(self, sc->sc_npins, gpiolock_position)) {
aprint_error(": can't register keylock\n");
goto fail;
}
#endif
if (!pmf_device_register(self, NULL, NULL))
aprint_error_dev(self, "couldn't establish power handler\n");
aprint_normal("\n");
return;
fail:
gpio_pin_unmap(sc->sc_gpio, &sc->sc_map);
}
int
gpiolock_detach(device_t self, int flags)
{
struct gpiolock_softc *sc = device_private(self);
pmf_device_deregister(self);
#ifdef KEYLOCK
keylock_unregister(self, gpiolock_position);
#endif
gpio_pin_unmap(sc->sc_gpio, &sc->sc_map);
return 0;
}
int
gpiolock_activate(device_t self, enum devact act)
{
struct gpiolock_softc *sc = device_private(self);
switch (act) {
case DVACT_DEACTIVATE:
sc->sc_dying = 1;
return 0;
default:
return EOPNOTSUPP;
}
}
int
gpiolock_position(void *arg)
{
struct gpiolock_softc *sc = device_private((device_t)arg);
int pos, pin;
for (pos = pin = 0; pin < sc->sc_npins; pin++) {
if (gpio_pin_read(sc->sc_gpio, &sc->sc_map, pin) ==
GPIO_PIN_HIGH)
pos = pin + 1;
}
return pos;
}
|