Annotation of sys/dev/i2c/gl518sm.c, Revision 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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