Annotation of sys/dev/i2c/lm87.c, Revision 1.1.1.1
1.1 nbrk 1: /* $OpenBSD: lm87.c,v 1.19 2007/06/24 05:34:35 dlg Exp $ */
2:
3: /*
4: * Copyright (c) 2005 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: /* LM87 registers */
27: #define LM87_2_5V 0x20
28: #define LM87_VCCP1 0x21
29: #define LM87_VCC 0x22
30: #define LM87_5V 0x23
31: #define LM87_12V 0x24
32: #define LM87_VCCP2 0x25
33: #define LM87_EXT_TEMP 0x26
34: #define LM87_INT_TEMP 0x27
35: #define LM87_FAN1 0x28
36: #define LM87_FAN2 0x29
37: #define LM87_REVISION 0x3f
38: #define LM87_CONFIG1 0x40
39: #define LM87_CONFIG1_START 0x01
40: #define LM87_CONFIG1_INTCLR 0x08
41: #define LM87_CHANNEL 0x16
42: #define LM87_CHANNEL_AIN1 0x01
43: #define LM87_CHANNEL_AIN2 0x02
44: #define LM87_FANDIV 0x47
45:
46: /* Sensors */
47: #define LMENV_2_5V 0
48: #define LMENV_VCCP1 1
49: #define LMENV_VCC 2
50: #define LMENV_5V 3
51: #define LMENV_12V 4
52: #define LMENV_VCCP2 5
53: #define LMENV_EXT_TEMP 6
54: #define LMENV_INT_TEMP 7
55: #define LMENV_FAN1 8
56: #define LMENV_FAN2 9
57: #define LMENV_NUM_SENSORS 10
58:
59: struct lmenv_softc {
60: struct device sc_dev;
61: i2c_tag_t sc_tag;
62: i2c_addr_t sc_addr;
63:
64: struct ksensor sc_sensor[LMENV_NUM_SENSORS];
65: struct ksensordev sc_sensordev;
66: int sc_fan1_div, sc_fan2_div;
67: int sc_family;
68: };
69:
70: int lmenv_match(struct device *, void *, void *);
71: void lmenv_attach(struct device *, struct device *, void *);
72:
73: void lmenv_refresh(void *);
74:
75: struct cfattach lmenv_ca = {
76: sizeof(struct lmenv_softc), lmenv_match, lmenv_attach
77: };
78:
79: struct cfdriver lmenv_cd = {
80: NULL, "lmenv", DV_DULL
81: };
82:
83: int
84: lmenv_match(struct device *parent, void *match, void *aux)
85: {
86: struct i2c_attach_args *ia = aux;
87:
88: if (strcmp(ia->ia_name, "lm87") == 0 ||
89: strcmp(ia->ia_name, "lm87cimt") == 0 ||
90: strcmp(ia->ia_name, "adm9240") == 0 ||
91: strcmp(ia->ia_name, "lm81") == 0 ||
92: strcmp(ia->ia_name, "ds1780") == 0)
93: return (1);
94: return (0);
95: }
96:
97: void
98: lmenv_attach(struct device *parent, struct device *self, void *aux)
99: {
100: struct lmenv_softc *sc = (struct lmenv_softc *)self;
101: struct i2c_attach_args *ia = aux;
102: u_int8_t cmd, data, data2, channel;
103: int i;
104:
105: sc->sc_tag = ia->ia_tag;
106: sc->sc_addr = ia->ia_addr;
107:
108: sc->sc_family = 87;
109: if (strcmp(ia->ia_name, "lm81") == 0 ||
110: strcmp(ia->ia_name, "adm9240") == 0 ||
111: strcmp(ia->ia_name, "ds1780") == 0)
112: sc->sc_family = 81;
113:
114: iic_acquire_bus(sc->sc_tag, 0);
115:
116: cmd = LM87_REVISION;
117: if (iic_exec(sc->sc_tag, I2C_OP_READ_WITH_STOP,
118: sc->sc_addr, &cmd, sizeof cmd, &data, sizeof data, 0)) {
119: iic_release_bus(sc->sc_tag, 0);
120: printf(": cannot read ID register\n");
121: return;
122: }
123: printf(": %s rev %x", ia->ia_name, data);
124:
125: cmd = LM87_FANDIV;
126: if (iic_exec(sc->sc_tag, I2C_OP_READ_WITH_STOP,
127: sc->sc_addr, &cmd, sizeof cmd, &data, sizeof data, 0)) {
128: iic_release_bus(sc->sc_tag, 0);
129: printf(", cannot read Fan Divisor register\n");
130: return;
131: }
132: sc->sc_fan1_div = 1 << ((data >> 4) & 0x03);
133: sc->sc_fan2_div = 1 << ((data >> 6) & 0x03);
134:
135: if (sc->sc_family == 87) {
136: cmd = LM87_CHANNEL;
137: if (iic_exec(sc->sc_tag, I2C_OP_READ_WITH_STOP,
138: sc->sc_addr, &cmd, sizeof cmd, &channel,
139: sizeof channel, 0)) {
140: iic_release_bus(sc->sc_tag, 0);
141: printf(", cannot read Channel register\n");
142: return;
143: }
144: }
145:
146: cmd = LM87_CONFIG1;
147: if (iic_exec(sc->sc_tag, I2C_OP_READ_WITH_STOP,
148: sc->sc_addr, &cmd, sizeof cmd, &data, sizeof data, 0)) {
149: iic_release_bus(sc->sc_tag, 0);
150: printf(", cannot read Configuration Register 1\n");
151: return;
152: }
153:
154: /*
155: * if chip is not running, try to start it.
156: * if it is stalled doing an interrupt, unstall it
157: */
158: data2 = (data | LM87_CONFIG1_START);
159: data2 = data2 & ~LM87_CONFIG1_INTCLR;
160:
161: if (data != data2) {
162: if (iic_exec(sc->sc_tag, I2C_OP_WRITE_WITH_STOP,
163: sc->sc_addr, &cmd, sizeof cmd, &data2, sizeof data2, 0)) {
164: iic_release_bus(sc->sc_tag, 0);
165: printf(", cannot write Configuration Register 1\n");
166: return;
167: }
168: printf(", starting scan");
169: }
170: iic_release_bus(sc->sc_tag, 0);
171:
172: /* Initialize sensor data. */
173: strlcpy(sc->sc_sensordev.xname, sc->sc_dev.dv_xname,
174: sizeof(sc->sc_sensordev.xname));
175:
176: sc->sc_sensor[LMENV_2_5V].type = SENSOR_VOLTS_DC;
177: strlcpy(sc->sc_sensor[LMENV_2_5V].desc, "+2.5Vin",
178: sizeof(sc->sc_sensor[LMENV_2_5V].desc));
179:
180: sc->sc_sensor[LMENV_VCCP1].type = SENSOR_VOLTS_DC;
181: strlcpy(sc->sc_sensor[LMENV_VCCP1].desc, "Vccp",
182: sizeof(sc->sc_sensor[LMENV_VCCP1].desc));
183:
184: sc->sc_sensor[LMENV_VCC].type = SENSOR_VOLTS_DC;
185: strlcpy(sc->sc_sensor[LMENV_VCC].desc, "+Vcc",
186: sizeof(sc->sc_sensor[LMENV_VCC].desc));
187:
188: sc->sc_sensor[LMENV_5V].type = SENSOR_VOLTS_DC;
189: strlcpy(sc->sc_sensor[LMENV_5V].desc, "+5Vin/Vcc",
190: sizeof(sc->sc_sensor[LMENV_5V].desc));
191:
192: sc->sc_sensor[LMENV_12V].type = SENSOR_VOLTS_DC;
193: strlcpy(sc->sc_sensor[LMENV_12V].desc, "+12Vin",
194: sizeof(sc->sc_sensor[LMENV_12V].desc));
195:
196: sc->sc_sensor[LMENV_VCCP2].type = SENSOR_VOLTS_DC;
197: strlcpy(sc->sc_sensor[LMENV_VCCP2].desc, "Vccp",
198: sizeof(sc->sc_sensor[LMENV_VCCP2].desc));
199:
200: sc->sc_sensor[LMENV_EXT_TEMP].type = SENSOR_TEMP;
201: strlcpy(sc->sc_sensor[LMENV_EXT_TEMP].desc, "External",
202: sizeof(sc->sc_sensor[LMENV_EXT_TEMP].desc));
203: if (sc->sc_family == 81)
204: sc->sc_sensor[LMENV_EXT_TEMP].flags |= SENSOR_FINVALID;
205:
206: sc->sc_sensor[LMENV_INT_TEMP].type = SENSOR_TEMP;
207: strlcpy(sc->sc_sensor[LMENV_INT_TEMP].desc, "Internal",
208: sizeof(sc->sc_sensor[LMENV_INT_TEMP].desc));
209:
210: if (channel & LM87_CHANNEL_AIN1) {
211: sc->sc_sensor[LMENV_FAN1].type = SENSOR_VOLTS_DC;
212: strlcpy(sc->sc_sensor[LMENV_FAN1].desc, "AIN1",
213: sizeof(sc->sc_sensor[LMENV_FAN1].desc));
214: } else {
215: sc->sc_sensor[LMENV_FAN1].type = SENSOR_FANRPM;
216: }
217:
218: if (channel & LM87_CHANNEL_AIN2) {
219: sc->sc_sensor[LMENV_FAN2].type = SENSOR_VOLTS_DC;
220: strlcpy(sc->sc_sensor[LMENV_FAN2].desc, "AIN2",
221: sizeof(sc->sc_sensor[LMENV_FAN2].desc));
222: } else {
223: sc->sc_sensor[LMENV_FAN2].type = SENSOR_FANRPM;
224: }
225:
226: if (sensor_task_register(sc, lmenv_refresh, 5) == NULL) {
227: printf(", unable to register update task\n");
228: return;
229: }
230:
231: for (i = 0; i < LMENV_NUM_SENSORS; i++)
232: sensor_attach(&sc->sc_sensordev, &sc->sc_sensor[i]);
233: sensordev_install(&sc->sc_sensordev);
234:
235: printf("\n");
236: }
237:
238: void
239: lmenv_refresh(void *arg)
240: {
241: struct lmenv_softc *sc = arg;
242: u_int8_t cmd, data;
243: u_int tmp;
244: int sensor;
245:
246: iic_acquire_bus(sc->sc_tag, 0);
247:
248: for (sensor = 0; sensor < LMENV_NUM_SENSORS; sensor++) {
249: cmd = LM87_2_5V + sensor;
250: if (iic_exec(sc->sc_tag, I2C_OP_READ_WITH_STOP,
251: sc->sc_addr, &cmd, sizeof cmd, &data, sizeof data, 0)) {
252: sc->sc_sensor[sensor].flags |= SENSOR_FINVALID;
253: continue;
254: }
255:
256: sc->sc_sensor[sensor].flags &= ~SENSOR_FINVALID;
257: switch (sensor) {
258: case LMENV_2_5V:
259: sc->sc_sensor[sensor].value = 2500000 * data / 192;
260: break;
261: case LMENV_5V:
262: sc->sc_sensor[sensor].value = 5000000 * data / 192;
263: break;
264: case LMENV_12V:
265: sc->sc_sensor[sensor].value = 12000000 * data / 192;
266: break;
267: case LMENV_VCCP1:
268: case LMENV_VCCP2:
269: sc->sc_sensor[sensor].value = 2700000 * data / 192;
270: break;
271: case LMENV_VCC:
272: sc->sc_sensor[sensor].value = 3300000 * data / 192;
273: break;
274: case LMENV_EXT_TEMP:
275: if (sc->sc_family == 81) {
276: sc->sc_sensor[sensor].flags |= SENSOR_FINVALID;
277: break; /* missing on LM81 */
278: }
279: /* FALLTHROUGH */
280: case LMENV_INT_TEMP:
281: if (data == 0x80)
282: sc->sc_sensor[sensor].flags |= SENSOR_FINVALID;
283: else
284: sc->sc_sensor[sensor].value =
285: (int8_t)data * 1000000 + 273150000;
286: break;
287: case LMENV_FAN1:
288: if (sc->sc_sensor[sensor].type == SENSOR_VOLTS_DC) {
289: sc->sc_sensor[sensor].value =
290: 1870000 * data / 192;
291: break;
292: }
293: tmp = data * sc->sc_fan1_div;
294: if (tmp == 0)
295: sc->sc_sensor[sensor].flags |= SENSOR_FINVALID;
296: else
297: sc->sc_sensor[sensor].value = 1350000 / tmp;
298: break;
299: case LMENV_FAN2:
300: if (sc->sc_sensor[sensor].type == SENSOR_VOLTS_DC) {
301: sc->sc_sensor[sensor].value =
302: 1870000 * data / 192;
303: break;
304: }
305: tmp = data * sc->sc_fan2_div;
306: if (tmp == 0)
307: sc->sc_sensor[sensor].flags |= SENSOR_FINVALID;
308: else
309: sc->sc_sensor[sensor].value = 1350000 / tmp;
310: break;
311: default:
312: sc->sc_sensor[sensor].flags |= SENSOR_FINVALID;
313: break;
314: }
315: }
316:
317: iic_release_bus(sc->sc_tag, 0);
318: }
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