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
194
|
/* $OpenBSD: bmc150.c,v 1.2 2022/04/06 18:59:28 naddy Exp $ */
/*
* Copyright (c) 2017 Mark Kettenis
*
* 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/sensors.h>
#include <dev/i2c/i2cvar.h>
#define BGW_CHIPID 0x00
#define BGW_CHIPID_BMA222E 0xf8
#define BGW_CHIPID_BMA250E 0xf9
#define BGW_CHIPID_BMC150 0xfa
#define BGW_CHIPID_BMI055 0xfa
#define BGW_CHIPID_BMA255 0xfa
#define BGW_CHIPID_BMA280 0xfb
#define ACCD_X_LSB 0x02
#define ACCD_X_MSB 0x03
#define ACCD_Y_LSB 0x04
#define ACCD_Y_MSB 0x05
#define ACCD_Z_LSB 0x06
#define ACCD_Z_MSB 0x07
#define ACCD_TEMP 0x08
#define BGW_NUM_SENSORS 4
#define BGW_SENSOR_XACCEL 0
#define BGW_SENSOR_YACCEL 1
#define BGW_SENSOR_ZACCEL 2
#define BGW_SENSOR_TEMP 3
struct bgw_softc {
struct device sc_dev;
i2c_tag_t sc_tag;
i2c_addr_t sc_addr;
uint8_t sc_temp0;
struct ksensor sc_sensor[BGW_NUM_SENSORS];
struct ksensordev sc_sensordev;
};
int bgw_match(struct device *, void *, void *);
void bgw_attach(struct device *, struct device *, void *);
const struct cfattach bgw_ca = {
sizeof(struct bgw_softc), bgw_match, bgw_attach
};
struct cfdriver bgw_cd = {
NULL, "bgw", DV_DULL
};
void bgw_refresh(void *);
int
bgw_match(struct device *parent, void *match, void *aux)
{
struct i2c_attach_args *ia = aux;
if (strcmp(ia->ia_name, "BSBA0150") == 0 ||
strcmp(ia->ia_name, "BMC150A") == 0 ||
strcmp(ia->ia_name, "BMI055A") == 0 ||
strcmp(ia->ia_name, "BMA0255") == 0 ||
strcmp(ia->ia_name, "BMA250E") == 0 ||
strcmp(ia->ia_name, "BMA222E") == 0 ||
strcmp(ia->ia_name, "BMA0280") == 0 ||
strcmp(ia->ia_name, "BOSC0200") == 0)
return 1;
return 0;
}
void
bgw_attach(struct device *parent, struct device *self, void *aux)
{
struct bgw_softc *sc = (struct bgw_softc *)self;
struct i2c_attach_args *ia = aux;
uint8_t cmd, data;
int i;
sc->sc_tag = ia->ia_tag;
sc->sc_addr = ia->ia_addr;
iic_acquire_bus(sc->sc_tag, 0);
cmd = BGW_CHIPID;
if (iic_exec(sc->sc_tag, I2C_OP_READ_WITH_STOP,
sc->sc_addr, &cmd, sizeof cmd, &data, sizeof data, 0)) {
iic_release_bus(sc->sc_tag, 0);
printf(": can't read chip ID\n");
return;
}
iic_release_bus(sc->sc_tag, 0);
switch (data) {
case BGW_CHIPID_BMA222E:
sc->sc_temp0 = 23;
printf(": BMA222E");
break;
case BGW_CHIPID_BMA250E:
sc->sc_temp0 = 23;
printf(": BMA250E");
break;
case BGW_CHIPID_BMC150:
sc->sc_temp0 = 24;
printf(": BMC150");
break;
case BGW_CHIPID_BMA280:
sc->sc_temp0 = 23;
printf(": BMA280");
break;
}
sc->sc_sensor[BGW_SENSOR_XACCEL].type = SENSOR_INTEGER;
strlcpy(sc->sc_sensor[BGW_SENSOR_XACCEL].desc, "X_ACCEL",
sizeof(sc->sc_sensor[BGW_SENSOR_XACCEL].desc));
sc->sc_sensor[BGW_SENSOR_YACCEL].type = SENSOR_INTEGER;
strlcpy(sc->sc_sensor[BGW_SENSOR_YACCEL].desc, "Y_ACCEL",
sizeof(sc->sc_sensor[BGW_SENSOR_YACCEL].desc));
sc->sc_sensor[BGW_SENSOR_ZACCEL].type = SENSOR_INTEGER;
strlcpy(sc->sc_sensor[BGW_SENSOR_ZACCEL].desc, "Z_ACCEL",
sizeof(sc->sc_sensor[BGW_SENSOR_ZACCEL].desc));
sc->sc_sensor[BGW_SENSOR_TEMP].type = SENSOR_TEMP;
strlcpy(sc->sc_sensordev.xname, sc->sc_dev.dv_xname,
sizeof(sc->sc_sensordev.xname));
for (i = 0; i < BGW_NUM_SENSORS; i++)
sensor_attach(&sc->sc_sensordev, &sc->sc_sensor[i]);
sensordev_install(&sc->sc_sensordev);
if (sensor_task_register(sc, bgw_refresh, 5) == NULL) {
printf(", unable to register update task\n");
return;
}
printf("\n");
}
void
bgw_refresh(void *arg)
{
struct bgw_softc *sc = arg;
uint8_t cmd, data[7];
uint8_t lsb;
int8_t msb;
int8_t temp;
int i;
iic_acquire_bus(sc->sc_tag, 0);
cmd = ACCD_X_LSB;
if (iic_exec(sc->sc_tag, I2C_OP_READ_WITH_STOP,
sc->sc_addr, &cmd, sizeof cmd, &data, sizeof data, 0)) {
iic_release_bus(sc->sc_tag, 0);
for (i = 0; i < BGW_NUM_SENSORS; i++)
sc->sc_sensor[i].flags |= SENSOR_FINVALID;
return;
}
iic_release_bus(sc->sc_tag, 0);
lsb = data[ACCD_X_LSB - ACCD_X_LSB];
msb = data[ACCD_X_MSB - ACCD_X_LSB];
sc->sc_sensor[BGW_SENSOR_XACCEL].value = (msb << 4) | (lsb >> 4);
sc->sc_sensor[BGW_SENSOR_XACCEL].flags &= ~SENSOR_FINVALID;
lsb = data[ACCD_Y_LSB - ACCD_X_LSB];
msb = data[ACCD_Y_MSB - ACCD_X_LSB];
sc->sc_sensor[BGW_SENSOR_YACCEL].value = (msb << 4) | (lsb >> 4);
sc->sc_sensor[BGW_SENSOR_YACCEL].flags &= ~SENSOR_FINVALID;
lsb = data[ACCD_Z_LSB - ACCD_X_LSB];
msb = data[ACCD_Z_MSB - ACCD_X_LSB];
sc->sc_sensor[BGW_SENSOR_ZACCEL].value = (msb << 4) | (lsb >> 4);
sc->sc_sensor[BGW_SENSOR_ZACCEL].flags &= ~SENSOR_FINVALID;
temp = data[ACCD_TEMP - ACCD_X_LSB];
sc->sc_sensor[BGW_SENSOR_TEMP].value =
273150000 + (sc->sc_temp0 + temp) * 1000000;
sc->sc_sensor[BGW_SENSOR_TEMP].flags &= ~SENSOR_FINVALID;
}
|
