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
|
/* $OpenBSD: gpiobl.c,v 1.3 2023/01/03 10:59:00 tobhe Exp $ */
/*
* Copyright (c) 2022 Tobias Heider <tobhe@openbsd.org>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/device.h>
#include <sys/malloc.h>
#include <sys/task.h>
#include <machine/fdt.h>
#include <machine/bus.h>
#include <dev/ofw/openfirm.h>
#include <dev/ofw/ofw_gpio.h>
#include <dev/ofw/ofw_misc.h>
#include <dev/wscons/wsconsio.h>
#include <dev/wscons/wsdisplayvar.h>
extern void (*simplefb_burn_hook)(u_int);
struct gpiobl_softc {
struct device sc_dev;
int sc_on;
uint32_t sc_gpio[3];
struct task sc_task;
};
struct gpiobl_softc *sc_gpiobl;
int gpiobl_match(struct device *, void *, void *);
void gpiobl_attach(struct device *, struct device *, void *);
int gpiobl_activate(struct device *, int);
const struct cfattach gpiobl_ca = {
sizeof(struct gpiobl_softc), gpiobl_match, gpiobl_attach, NULL,
gpiobl_activate
};
struct cfdriver gpiobl_cd = {
NULL, "gpiobl", DV_DULL
};
void gpiobl_set(u_int);
void gpiobl_task(void *);
int
gpiobl_match(struct device *parent, void *match, void *aux)
{
struct fdt_attach_args *faa = aux;
return OF_is_compatible(faa->fa_node, "gpio-backlight");
}
void
gpiobl_attach(struct device *parent, struct device *self, void *aux)
{
struct gpiobl_softc *sc = (struct gpiobl_softc *)self;
struct fdt_attach_args *faa = aux;
size_t len;
len = OF_getproplen(faa->fa_node, "gpios");
if (len <= 0)
return;
OF_getpropintarray(faa->fa_node, "gpios", sc->sc_gpio, len);
gpio_controller_config_pin(sc->sc_gpio, GPIO_CONFIG_OUTPUT);
sc->sc_on = OF_getpropbool(faa->fa_node, "default-on");
sc_gpiobl = sc;
task_set(&sc->sc_task, gpiobl_task, sc);
simplefb_burn_hook = gpiobl_set;
printf("\n");
}
int
gpiobl_activate(struct device *self, int act)
{
struct gpiobl_softc *sc = (struct gpiobl_softc *)self;
switch (act) {
case DVACT_QUIESCE:
gpio_controller_set_pin(&sc->sc_gpio[0], 0);
break;
case DVACT_WAKEUP:
gpio_controller_set_pin(&sc->sc_gpio[0], sc->sc_on);
break;
}
return 0;
}
void
gpiobl_set(u_int on)
{
struct gpiobl_softc *sc = (struct gpiobl_softc *)sc_gpiobl;
sc->sc_on = on;
task_add(systq, &sc->sc_task);
}
void
gpiobl_task(void *args)
{
struct gpiobl_softc *sc = args;
gpio_controller_set_pin(&sc->sc_gpio[0], sc->sc_on);
}
|
