Annotation of sys/dev/i2c/adm1030.c, Revision 1.1.1.1
1.1 nbrk 1: /* $OpenBSD: adm1030.c,v 1.8 2007/06/24 05:34:35 dlg 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: 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
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
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
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: }
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