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
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
|
/* $OpenBSD: acpials.c,v 1.3 2017/03/13 14:44:37 jcs Exp $ */
/*
* Ambient Light Sensor device driver
* ACPI 5.0 spec section 9.2
*
* Copyright (c) 2016 joshua stein <jcs@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 <dev/acpi/acpireg.h>
#include <dev/acpi/acpivar.h>
#include <dev/acpi/acpidev.h>
#include <dev/acpi/amltypes.h>
#include <dev/acpi/dsdt.h>
#include <sys/sensors.h>
/* #define ACPIALS_DEBUG */
#ifdef ACPIALS_DEBUG
#define DPRINTF(x) printf x
#else
#define DPRINTF(x)
#endif
struct acpials_softc {
struct device sc_dev;
bus_space_tag_t sc_iot;
bus_space_handle_t sc_ioh;
struct acpi_softc *sc_acpi;
struct aml_node *sc_devnode;
struct ksensor sc_sensor;
struct ksensordev sc_sensordev;
struct sensor_task *sc_sensor_task;
};
int acpials_match(struct device *, void *, void *);
void acpials_attach(struct device *, struct device *, void *);
int acpials_read(struct acpials_softc *);
int acpials_notify(struct aml_node *, int, void *);
void acpials_addtask(void *);
void acpials_update(void *, int);
const struct cfattach acpials_ca = {
sizeof(struct acpials_softc),
acpials_match,
acpials_attach,
};
struct cfdriver acpials_cd = {
NULL, "acpials", DV_DULL
};
const char *acpials_hids[] = {
"ACPI0008",
NULL
};
extern char *hw_vendor;
int
acpials_match(struct device *parent, void *match, void *aux)
{
struct acpi_attach_args *aa = aux;
struct cfdata *cf = match;
/*
* Apple hardware will most likely have asmc(4) which also provides an
* illuminance sensor.
*/
if (hw_vendor != NULL && strncmp(hw_vendor, "Apple", 5) == 0)
return 0;
return (acpi_matchhids(aa, acpials_hids, cf->cf_driver->cd_name));
}
void
acpials_attach(struct device *parent, struct device *self, void *aux)
{
struct acpials_softc *sc = (struct acpials_softc *)self;
struct acpi_attach_args *aa = aux;
int64_t st;
sc->sc_acpi = (struct acpi_softc *)parent;
sc->sc_devnode = aa->aaa_node;
printf(": %s\n", sc->sc_devnode->name);
if (aml_evalinteger(sc->sc_acpi, sc->sc_devnode, "_STA", 0, NULL, &st))
st = STA_PRESENT | STA_ENABLED | STA_DEV_OK;
if ((st & (STA_PRESENT | STA_ENABLED | STA_DEV_OK)) !=
(STA_PRESENT | STA_ENABLED | STA_DEV_OK))
return;
if (acpials_read(sc))
return;
strlcpy(sc->sc_sensordev.xname, DEVNAME(sc),
sizeof(sc->sc_sensordev.xname));
strlcpy(sc->sc_sensor.desc, "ambient light sensor",
sizeof(sc->sc_sensor.desc));
sc->sc_sensor.type = SENSOR_LUX;
sensor_attach(&sc->sc_sensordev, &sc->sc_sensor);
/*
* aml_register_notify with ACPIDEV_POLL is too slow (10 second
* intervals), so register the task with sensors so we can specify the
* interval, which will then just inject an acpi task and tell it to
* wakeup to handle the task.
*/
if (!(sc->sc_sensor_task = sensor_task_register(sc, acpials_addtask,
1))) {
printf("%s: unable to register task\n", sc->sc_dev.dv_xname);
return;
}
/*
* But also install an event handler in case AML Notify()s us of any
* large changes - 9.2.7
*/
aml_register_notify(sc->sc_devnode, aa->aaa_dev, acpials_notify,
sc, ACPIDEV_NOPOLL);
sensordev_install(&sc->sc_sensordev);
}
int
acpials_read(struct acpials_softc *sc)
{
int64_t ali = 0;
/* 9.2.2 - "Current ambient light illuminance reading in lux" */
if (aml_evalinteger(sc->sc_acpi, sc->sc_devnode, "_ALI", 0, NULL,
&ali))
return 1;
sc->sc_sensor.value = (ali * 1000000);
return 0;
}
int
acpials_notify(struct aml_node *node, int notify_type, void *arg)
{
struct acpials_softc *sc = arg;
DPRINTF(("%s: %s: %d\n", sc->sc_dev.dv_xname, __func__, notify_type));
if (notify_type == 0x80)
acpials_read(sc);
return 0;
}
void
acpials_addtask(void *arg)
{
struct acpials_softc *sc = arg;
acpi_addtask(sc->sc_acpi, acpials_update, sc, 0);
acpi_wakeup(sc->sc_acpi);
}
void
acpials_update(void *arg0, int arg1)
{
struct acpials_softc *sc = arg0;
if (acpials_read(sc) == 0) {
DPRINTF(("%s: %s: %lld\n", sc->sc_dev.dv_xname, __func__,
sc->sc_sensor.value));
sc->sc_sensor.flags &= ~SENSOR_FINVALID;
} else
sc->sc_sensor.flags |= SENSOR_FINVALID;
}
|
