Annotation of sys/dev/i2c/gl518sm.c, Revision 1.1.1.1
1.1 nbrk 1: /* $OpenBSD: gl518sm.c,v 1.6 2007/06/24 05:34:35 dlg Exp $ */
2:
3: /*
4: * Copyright (c) 2006 Mark Kettenis
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: /* GL518SM registers */
27: #define GL518SM_CHIPID 0x00
28: #define GL518SM_REVISION 0x01
29: #define GL518SM_VENDORID 0x02
30: #define GL518SM_CONFIG 0x03
31: #define GL518SM_CONFIG_START 0x40
32: #define GL518SM_CONFIG_CLEARST 0x20
33: #define GL518SM_CONFIG_NOFAN2 0x10
34: #define GL518SM_TEMP 0x04
35: #define GL518SM_TEMP_OVER 0x05
36: #define GL518SM_TEMP_HYST 0x06
37: #define GL518SM_FAN_COUNT 0x07
38: #define GL518SM_FAN_LIMIT 0x08
39: #define GL518SM_VIN1_LIMIT 0x09
40: #define GL518SM_VIN2_LIMIT 0x0a
41: #define GL518SM_VIN3_LIMIT 0x0b
42: #define GL518SM_VDD_LIMIT 0x0c
43: #define GL518SM_VOLTMETER 0x0d
44: #define GL518SM_MISC 0x0f
45: #define GL518SM_ALARM 0x10
46: #define GL518SM_MASK 0x11
47: #define GL518SM_INTSTAT 0x12
48:
49: /* Sensors */
50: #define GLENV_VIN3 0
51: #define GLENV_TEMP 1
52: #define GLENV_FAN1 2
53: #define GLENV_FAN2 3
54: #define GLENV_NUM_SENSORS 4
55:
56: struct glenv_softc {
57: struct device sc_dev;
58:
59: i2c_tag_t sc_tag;
60: i2c_addr_t sc_addr;
61:
62: struct ksensor sc_sensor[GLENV_NUM_SENSORS];
63: struct ksensordev sc_sensordev;
64: int sc_fan1_div, sc_fan2_div;
65: };
66:
67: int glenv_match(struct device *, void *, void *);
68: void glenv_attach(struct device *, struct device *, void *);
69:
70: void glenv_refresh(void *);
71:
72: struct cfattach glenv_ca = {
73: sizeof(struct glenv_softc), glenv_match, glenv_attach
74: };
75:
76: struct cfdriver glenv_cd = {
77: NULL, "glenv", DV_DULL
78: };
79:
80: int
81: glenv_match(struct device *parent, void *match, void *aux)
82: {
83: struct i2c_attach_args *ia = aux;
84:
85: if (strcmp(ia->ia_name, "gl518sm") == 0)
86: return (1);
87: return (0);
88: }
89:
90: void
91: glenv_attach(struct device *parent, struct device *self, void *aux)
92: {
93: struct glenv_softc *sc = (struct glenv_softc *)self;
94: struct i2c_attach_args *ia = aux;
95: u_int8_t cmd, data;
96: int i;
97:
98: sc->sc_tag = ia->ia_tag;
99: sc->sc_addr = ia->ia_addr;
100:
101: iic_acquire_bus(sc->sc_tag, 0);
102:
103: cmd = GL518SM_REVISION;
104: if (iic_exec(sc->sc_tag, I2C_OP_READ_WITH_STOP,
105: sc->sc_addr, &cmd, sizeof cmd, &data, sizeof data, 0)) {
106: iic_release_bus(sc->sc_tag, 0);
107: printf(": cannot read revision register\n");
108: return;
109: }
110:
111: printf(": GL518SM rev 0x%02x", data);
112:
113: cmd = GL518SM_MISC;
114: if (iic_exec(sc->sc_tag, I2C_OP_READ_WITH_STOP,
115: sc->sc_addr, &cmd, sizeof cmd, &data, sizeof data, 0)) {
116: iic_release_bus(sc->sc_tag, 0);
117: printf(", cannot read misc register\n");
118: return;
119: }
120: sc->sc_fan1_div = 1 << ((data >> 6) & 0x03);
121: sc->sc_fan2_div = 1 << ((data >> 4) & 0x03);
122:
123: cmd = GL518SM_CONFIG;
124: if (iic_exec(sc->sc_tag, I2C_OP_READ_WITH_STOP,
125: sc->sc_addr, &cmd, sizeof cmd, &data, sizeof data, 0)) {
126: iic_release_bus(sc->sc_tag, 0);
127: printf(", cannot read configuration register\n");
128: return;
129: }
130: if (data & GL518SM_CONFIG_NOFAN2)
131: sc->sc_fan2_div = 0;
132:
133: /* Start monitoring and clear interrupt status. */
134: data = (data | GL518SM_CONFIG_START | GL518SM_CONFIG_CLEARST);
135: if (iic_exec(sc->sc_tag, I2C_OP_WRITE_WITH_STOP,
136: sc->sc_addr, &cmd, sizeof cmd, &data, sizeof data, 0)) {
137: iic_release_bus(sc->sc_tag, 0);
138: printf(", cannot write configuration register\n");
139: return;
140: }
141:
142: iic_release_bus(sc->sc_tag, 0);
143:
144: /* Initialize sensor data. */
145: strlcpy(sc->sc_sensordev.xname, sc->sc_dev.dv_xname,
146: sizeof(sc->sc_sensordev.xname));
147:
148: sc->sc_sensor[GLENV_VIN3].type = SENSOR_VOLTS_DC;
149:
150: sc->sc_sensor[GLENV_TEMP].type = SENSOR_TEMP;
151:
152: sc->sc_sensor[GLENV_FAN1].type = SENSOR_FANRPM;
153:
154: sc->sc_sensor[GLENV_FAN2].type = SENSOR_FANRPM;
155: if (sc->sc_fan2_div == -1)
156: sc->sc_sensor[GLENV_FAN2].flags |= SENSOR_FINVALID;
157:
158: if (sensor_task_register(sc, glenv_refresh, 5) == NULL) {
159: printf(", unable to register update task\n");
160: return;
161: }
162:
163: for (i = 0; i < GLENV_NUM_SENSORS; i++)
164: sensor_attach(&sc->sc_sensordev, &sc->sc_sensor[i]);
165: sensordev_install(&sc->sc_sensordev);
166:
167: printf("\n");
168: }
169:
170: void
171: glenv_refresh(void *arg)
172: {
173: struct glenv_softc *sc = arg;
174: u_int8_t cmd, data, data2[2];
175: u_int tmp;
176:
177: iic_acquire_bus(sc->sc_tag, 0);
178:
179: cmd = GL518SM_VOLTMETER;
180: if (iic_exec(sc->sc_tag, I2C_OP_READ_WITH_STOP,
181: sc->sc_addr, &cmd, sizeof cmd, &data, sizeof data, 0)) {
182: sc->sc_sensor[GLENV_VIN3].flags |= SENSOR_FINVALID;
183: } else {
184: sc->sc_sensor[GLENV_VIN3].flags &= ~SENSOR_FINVALID;
185: sc->sc_sensor[GLENV_VIN3].value = data * 19000;
186: }
187:
188: cmd = GL518SM_TEMP;
189: if (iic_exec(sc->sc_tag, I2C_OP_READ_WITH_STOP,
190: sc->sc_addr, &cmd, sizeof cmd, &data, sizeof data, 0)) {
191: sc->sc_sensor[GLENV_TEMP].flags |= SENSOR_FINVALID;
192: } else {
193: sc->sc_sensor[GLENV_TEMP].flags &= ~SENSOR_FINVALID;
194: sc->sc_sensor[GLENV_TEMP].value =
195: (data - 119) * 1000000 + 273150000;
196: }
197:
198: cmd = GL518SM_FAN_COUNT;
199: if (iic_exec(sc->sc_tag, I2C_OP_READ_WITH_STOP,
200: sc->sc_addr, &cmd, sizeof cmd, &data2, sizeof data2, 0)) {
201: sc->sc_sensor[GLENV_FAN1].flags |= SENSOR_FINVALID;
202: sc->sc_sensor[GLENV_FAN2].flags |= SENSOR_FINVALID;
203: } else {
204: sc->sc_sensor[GLENV_FAN1].flags &= ~SENSOR_FINVALID;
205: tmp = data2[0] * sc->sc_fan1_div * 2;
206: if (tmp == 0)
207: sc->sc_sensor[GLENV_FAN1].flags |= SENSOR_FINVALID;
208: else
209: sc->sc_sensor[GLENV_FAN1].value = 960000 / tmp;
210:
211: sc->sc_sensor[GLENV_FAN2].flags &= ~SENSOR_FINVALID;
212: tmp = data2[1] * sc->sc_fan2_div * 2;
213: if (tmp == 0)
214: sc->sc_sensor[GLENV_FAN2].flags |= SENSOR_FINVALID;
215: else
216: sc->sc_sensor[GLENV_FAN2].value = 960000 / tmp;
217: }
218:
219: iic_release_bus(sc->sc_tag, 0);
220: }
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