1 /* $OpenBSD: thmc50.c,v 1.5 2022/04/06 18:59:28 naddy Exp $ */
2
3 /*
4 * Copyright (c) 2007 Theo de Raadt
5 *
6 * Permission to use, copy, modify, and distribute this software for any
7 * purpose with or without fee is hereby granted, provided that the above
8 * copyright notice and this permission notice appear in all copies.
9 *
10 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
11 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
12 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
13 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
14 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
15 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
16 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
17 */
18
19 #include <sys/param.h>
20 #include <sys/systm.h>
21 #include <sys/device.h>
22 #include <sys/sensors.h>
23
24 #include <dev/i2c/i2cvar.h>
25
26 /* THMC50 registers */
27 #define THMC50_TEMP0 0x27
28 #define THMC50_TEMP1 0x26
29 #define THMC50_TEMP2 0x20
30
31 /* Sensors */
32 #define THMC_TEMP0 0
33 #define THMC_TEMP1 1
34 #define THMC_TEMP2 2
35 #define THMC_NUM_SENSORS 3
36
37 struct thmc_softc {
38 struct device sc_dev;
39 i2c_tag_t sc_tag;
40 i2c_addr_t sc_addr;
41
42 struct ksensor sc_sensor[THMC_NUM_SENSORS];
43 struct ksensordev sc_sensordev;
44 };
45
46 int thmc_match(struct device *, void *, void *);
47 void thmc_attach(struct device *, struct device *, void *);
48 void thmc_refresh(void *);
49
50 const struct cfattach thmc_ca = {
51 sizeof(struct thmc_softc), thmc_match, thmc_attach
52 };
53
54 struct cfdriver thmc_cd = {
55 NULL, "thmc", DV_DULL
56 };
57
58 int
thmc_match(struct device * parent,void * match,void * aux)59 thmc_match(struct device *parent, void *match, void *aux)
60 {
61 struct i2c_attach_args *ia = aux;
62
63 if (strcmp(ia->ia_name, "thmc50") == 0 ||
64 strcmp(ia->ia_name, "adm1022") == 0 ||
65 strcmp(ia->ia_name, "adm1028") == 0)
66 return (1);
67 return (0);
68 }
69
70 void
thmc_attach(struct device * parent,struct device * self,void * aux)71 thmc_attach(struct device *parent, struct device *self, void *aux)
72 {
73 struct thmc_softc *sc = (struct thmc_softc *)self;
74 struct i2c_attach_args *ia = aux;
75 int numsensors = THMC_NUM_SENSORS;
76 int i;
77
78 sc->sc_tag = ia->ia_tag;
79 sc->sc_addr = ia->ia_addr;
80
81 printf(": %s", ia->ia_name);
82
83 /* Initialize sensor data. */
84 strlcpy(sc->sc_sensordev.xname, sc->sc_dev.dv_xname,
85 sizeof(sc->sc_sensordev.xname));
86
87 sc->sc_sensor[THMC_TEMP0].type = SENSOR_TEMP;
88 strlcpy(sc->sc_sensor[THMC_TEMP0].desc, "Internal",
89 sizeof(sc->sc_sensor[THMC_TEMP0].desc));
90
91 sc->sc_sensor[THMC_TEMP1].type = SENSOR_TEMP;
92 strlcpy(sc->sc_sensor[THMC_TEMP1].desc, "External",
93 sizeof(sc->sc_sensor[THMC_TEMP1].desc));
94
95 if (strcmp(ia->ia_name, "adm1022") == 0) {
96 /* Only the adm1022 has a THMC50_TEMP2 sensor */
97 sc->sc_sensor[THMC_TEMP2].type = SENSOR_TEMP;
98 strlcpy(sc->sc_sensor[THMC_TEMP2].desc, "External",
99 sizeof(sc->sc_sensor[THMC_TEMP2].desc));
100 } else {
101 sc->sc_sensor[THMC_TEMP2].type = -1;
102 numsensors--;
103 }
104
105 if (sensor_task_register(sc, thmc_refresh, 5) == NULL) {
106 printf(", unable to register update task\n");
107 return;
108 }
109
110 for (i = 0; i < numsensors; i++)
111 sensor_attach(&sc->sc_sensordev, &sc->sc_sensor[i]);
112 sensordev_install(&sc->sc_sensordev);
113
114 printf("\n");
115 }
116
117 void
thmc_refresh(void * arg)118 thmc_refresh(void *arg)
119 {
120 struct thmc_softc *sc = arg;
121 u_int8_t cmd;
122 int8_t sdata;
123
124 iic_acquire_bus(sc->sc_tag, 0);
125
126 cmd = THMC50_TEMP0;
127 if (iic_exec(sc->sc_tag, I2C_OP_READ_WITH_STOP,
128 sc->sc_addr, &cmd, sizeof cmd, &sdata, sizeof sdata, 0) == 0) {
129 sc->sc_sensor[THMC_TEMP0].value = 273150000 + 1000000 * sdata;
130 sc->sc_sensor[THMC_TEMP0].flags &= ~SENSOR_FINVALID;
131 } else
132 sc->sc_sensor[THMC_TEMP0].flags |= SENSOR_FINVALID;
133
134 cmd = THMC50_TEMP1;
135 if (iic_exec(sc->sc_tag, I2C_OP_READ_WITH_STOP,
136 sc->sc_addr, &cmd, sizeof cmd, &sdata, sizeof sdata, 0) == 0) {
137 sc->sc_sensor[THMC_TEMP1].value = 273150000 + 1000000 * sdata;
138 sc->sc_sensor[THMC_TEMP1].flags &= ~SENSOR_FINVALID;
139 } else
140 sc->sc_sensor[THMC_TEMP1].flags |= SENSOR_FINVALID;
141
142 if (sc->sc_sensor[THMC_TEMP2].type > 0) {
143 cmd = THMC50_TEMP2;
144 if (iic_exec(sc->sc_tag, I2C_OP_READ_WITH_STOP,
145 sc->sc_addr, &cmd, sizeof cmd, &sdata, sizeof sdata, 0) == 0) {
146 sc->sc_sensor[THMC_TEMP2].value = 273150000 + 1000000 * sdata;
147 sc->sc_sensor[THMC_TEMP2].flags &= ~SENSOR_FINVALID;
148 } else
149 sc->sc_sensor[THMC_TEMP2].flags |= SENSOR_FINVALID;
150 }
151
152 iic_release_bus(sc->sc_tag, 0);
153 }
154