1 /* $OpenBSD: adm1030.c,v 1.10 2022/04/06 18:59:28 naddy Exp $ */
2
3 /*
4 * Copyright (c) 2005 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 /* adm 1030 registers */
27 #define ADM1030_INT_TEMP 0x0a
28 #define ADM1030_EXT_TEMP 0x0b
29 #define ADM1030_FAN 0x08
30 #define ADM1030_FANC 0x20
31 #define ADM1024_FANC_VAL(x) (x >> 6)
32
33 /* Sensors */
34 #define ADMTMP_INT 0
35 #define ADMTMP_EXT 1
36 #define ADMTMP_FAN 2
37 #define ADMTMP_NUM_SENSORS 3
38
39 struct admtmp_softc {
40 struct device sc_dev;
41 i2c_tag_t sc_tag;
42 i2c_addr_t sc_addr;
43 int sc_fanmul;
44
45 struct ksensor sc_sensor[ADMTMP_NUM_SENSORS];
46 struct ksensordev sc_sensordev;
47 };
48
49 int admtmp_match(struct device *, void *, void *);
50 void admtmp_attach(struct device *, struct device *, void *);
51 void admtmp_refresh(void *);
52
53 const struct cfattach admtmp_ca = {
54 sizeof(struct admtmp_softc), admtmp_match, admtmp_attach
55 };
56
57 struct cfdriver admtmp_cd = {
58 NULL, "admtmp", DV_DULL
59 };
60
61 int
admtmp_match(struct device * parent,void * match,void * aux)62 admtmp_match(struct device *parent, void *match, void *aux)
63 {
64 struct i2c_attach_args *ia = aux;
65
66 if (strcmp(ia->ia_name, "adm1030") == 0)
67 return (1);
68 return (0);
69 }
70
71 void
admtmp_attach(struct device * parent,struct device * self,void * aux)72 admtmp_attach(struct device *parent, struct device *self, void *aux)
73 {
74 struct admtmp_softc *sc = (struct admtmp_softc *)self;
75 struct i2c_attach_args *ia = aux;
76 u_int8_t cmd, data;
77 int i;
78
79 sc->sc_tag = ia->ia_tag;
80 sc->sc_addr = ia->ia_addr;
81
82 cmd = ADM1030_FANC;
83 if (iic_exec(sc->sc_tag, I2C_OP_READ_WITH_STOP,
84 sc->sc_addr, &cmd, sizeof cmd, &data, sizeof data, 0)) {
85 printf(": unable to read fan setting\n");
86 return;
87 }
88
89 sc->sc_fanmul = 11250/8 * (1 << ADM1024_FANC_VAL(data)) * 60;
90
91 /* Initialize sensor data. */
92 strlcpy(sc->sc_sensordev.xname, sc->sc_dev.dv_xname,
93 sizeof(sc->sc_sensordev.xname));
94
95 sc->sc_sensor[ADMTMP_INT].type = SENSOR_TEMP;
96 strlcpy(sc->sc_sensor[ADMTMP_INT].desc, "Internal",
97 sizeof(sc->sc_sensor[ADMTMP_INT].desc));
98
99 sc->sc_sensor[ADMTMP_EXT].type = SENSOR_TEMP;
100 strlcpy(sc->sc_sensor[ADMTMP_EXT].desc, "External",
101 sizeof(sc->sc_sensor[ADMTMP_EXT].desc));
102
103 sc->sc_sensor[ADMTMP_FAN].type = SENSOR_FANRPM;
104
105 if (sensor_task_register(sc, admtmp_refresh, 5) == NULL) {
106 printf(": unable to register update task\n");
107 return;
108 }
109
110 for (i = 0; i < ADMTMP_NUM_SENSORS; 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
admtmp_refresh(void * arg)118 admtmp_refresh(void *arg)
119 {
120 struct admtmp_softc *sc = arg;
121 u_int8_t cmd, data;
122
123 iic_acquire_bus(sc->sc_tag, 0);
124
125 cmd = ADM1030_INT_TEMP;
126 if (iic_exec(sc->sc_tag, I2C_OP_READ_WITH_STOP,
127 sc->sc_addr, &cmd, sizeof cmd, &data, sizeof data, 0) == 0)
128 sc->sc_sensor[ADMTMP_INT].value = 273150000 + 1000000 * data;
129
130 cmd = ADM1030_EXT_TEMP;
131 if (iic_exec(sc->sc_tag, I2C_OP_READ_WITH_STOP,
132 sc->sc_addr, &cmd, sizeof cmd, &data, sizeof data, 0) == 0)
133 sc->sc_sensor[ADMTMP_EXT].value = 273150000 + 1000000 * data;
134
135 cmd = ADM1030_FAN;
136 if (iic_exec(sc->sc_tag, I2C_OP_READ_WITH_STOP,
137 sc->sc_addr, &cmd, sizeof cmd, &data, sizeof data, 0) == 0) {
138 if (data == 0)
139 sc->sc_sensor[ADMTMP_FAN].flags |= SENSOR_FINVALID;
140 else {
141 sc->sc_sensor[ADMTMP_FAN].value =
142 sc->sc_fanmul / (2 * (int)data);
143 sc->sc_sensor[ADMTMP_FAN].flags &= ~SENSOR_FINVALID;
144 }
145 }
146
147 iic_release_bus(sc->sc_tag, 0);
148 }
149