Annotation of sys/dev/i2c/adm1021.c, Revision 1.1
1.1 ! nbrk 1: /* $OpenBSD: adm1021.c,v 1.27 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 1021 registers */
! 27: #define ADM1021_INT_TEMP 0x00
! 28: #define ADM1021_EXT_TEMP 0x01
! 29: #define ADM1021_STATUS 0x02
! 30: #define ADM1021_STATUS_INVAL 0x7f
! 31: #define ADM1021_STATUS_NOEXT 0x40
! 32: #define ADM1021_CONFIG_READ 0x03
! 33: #define ADM1021_CONFIG_WRITE 0x09
! 34: #define ADM1021_CONFIG_RUN 0x40
! 35: #define ADM1021_COMPANY 0xfe /* contains 0x41 */
! 36: #define ADM1021_STEPPING 0xff /* contains 0x3? */
! 37:
! 38: /* Sensors */
! 39: #define ADMTEMP_EXT 0
! 40: #define ADMTEMP_INT 1
! 41: #define ADMTEMP_NUM_SENSORS 2
! 42:
! 43: struct admtemp_softc {
! 44: struct device sc_dev;
! 45: i2c_tag_t sc_tag;
! 46: i2c_addr_t sc_addr;
! 47:
! 48: struct ksensor sc_sensor[ADMTEMP_NUM_SENSORS];
! 49: struct ksensordev sc_sensordev;
! 50: int sc_noexternal;
! 51: };
! 52:
! 53: int admtemp_match(struct device *, void *, void *);
! 54: void admtemp_attach(struct device *, struct device *, void *);
! 55: void admtemp_refresh(void *);
! 56:
! 57: struct cfattach admtemp_ca = {
! 58: sizeof(struct admtemp_softc), admtemp_match, admtemp_attach
! 59: };
! 60:
! 61: struct cfdriver admtemp_cd = {
! 62: NULL, "admtemp", DV_DULL
! 63: };
! 64:
! 65: int
! 66: admtemp_match(struct device *parent, void *match, void *aux)
! 67: {
! 68: struct i2c_attach_args *ia = aux;
! 69:
! 70: if (strcmp(ia->ia_name, "adm1021") == 0 ||
! 71: strcmp(ia->ia_name, "adm1023") == 0 ||
! 72: strcmp(ia->ia_name, "adm1032") == 0 ||
! 73: strcmp(ia->ia_name, "g781") == 0 ||
! 74: strcmp(ia->ia_name, "g781-1") == 0 ||
! 75: strcmp(ia->ia_name, "gl523sm") == 0 ||
! 76: strcmp(ia->ia_name, "max1617") == 0 ||
! 77: strcmp(ia->ia_name, "xeontemp") == 0)
! 78: return (1);
! 79: return (0);
! 80: }
! 81:
! 82: void
! 83: admtemp_attach(struct device *parent, struct device *self, void *aux)
! 84: {
! 85: struct admtemp_softc *sc = (struct admtemp_softc *)self;
! 86: struct i2c_attach_args *ia = aux;
! 87: u_int8_t cmd, data, stat;
! 88: int xeon = 0, i;
! 89:
! 90: sc->sc_tag = ia->ia_tag;
! 91: sc->sc_addr = ia->ia_addr;
! 92:
! 93: if (strcmp(ia->ia_name, "xeontemp") == 0) {
! 94: printf(": Xeon");
! 95: xeon = 1;
! 96: } else
! 97: printf(": %s", ia->ia_name);
! 98:
! 99: iic_acquire_bus(sc->sc_tag, 0);
! 100: cmd = ADM1021_CONFIG_READ;
! 101: if (iic_exec(sc->sc_tag, I2C_OP_READ_WITH_STOP,
! 102: sc->sc_addr, &cmd, sizeof cmd, &data, sizeof data, 0)) {
! 103: iic_release_bus(sc->sc_tag, 0);
! 104: printf(", cannot get control register\n");
! 105: return;
! 106: }
! 107: if (data & ADM1021_CONFIG_RUN) {
! 108: cmd = ADM1021_STATUS;
! 109: if (iic_exec(sc->sc_tag, I2C_OP_READ_WITH_STOP,
! 110: sc->sc_addr, &cmd, sizeof cmd, &stat, sizeof stat, 0)) {
! 111: iic_release_bus(sc->sc_tag, 0);
! 112: printf(", cannot read status register\n");
! 113: return;
! 114: }
! 115: if ((stat & ADM1021_STATUS_INVAL) == ADM1021_STATUS_INVAL) {
! 116: if (iic_exec(sc->sc_tag, I2C_OP_READ_WITH_STOP,
! 117: sc->sc_addr, &cmd, sizeof cmd, &stat, sizeof stat, 0)) {
! 118: iic_release_bus(sc->sc_tag, 0);
! 119: printf(", cannot read status register\n");
! 120: return;
! 121: }
! 122: }
! 123:
! 124: /* means external is dead */
! 125: if ((stat & ADM1021_STATUS_INVAL) != ADM1021_STATUS_INVAL &&
! 126: (stat & ADM1021_STATUS_NOEXT))
! 127: sc->sc_noexternal = 1;
! 128:
! 129: data &= ~ADM1021_CONFIG_RUN;
! 130: cmd = ADM1021_CONFIG_WRITE;
! 131: if (iic_exec(sc->sc_tag, I2C_OP_WRITE_WITH_STOP,
! 132: sc->sc_addr, &cmd, sizeof cmd, &data, sizeof data, 0)) {
! 133: iic_release_bus(sc->sc_tag, 0);
! 134: printf(", cannot set control register\n");
! 135: return;
! 136: }
! 137: }
! 138: iic_release_bus(sc->sc_tag, 0);
! 139:
! 140: /* Initialize sensor data. */
! 141: strlcpy(sc->sc_sensordev.xname, sc->sc_dev.dv_xname,
! 142: sizeof(sc->sc_sensordev.xname));
! 143:
! 144: sc->sc_sensor[ADMTEMP_EXT].type = SENSOR_TEMP;
! 145: strlcpy(sc->sc_sensor[ADMTEMP_EXT].desc,
! 146: xeon ? "Xeon" : "External",
! 147: sizeof(sc->sc_sensor[ADMTEMP_EXT].desc));
! 148:
! 149: sc->sc_sensor[ADMTEMP_INT].type = SENSOR_TEMP;
! 150: strlcpy(sc->sc_sensor[ADMTEMP_INT].desc,
! 151: xeon ? "Xeon" : "Internal",
! 152: sizeof(sc->sc_sensor[ADMTEMP_INT].desc));
! 153:
! 154: if (sensor_task_register(sc, admtemp_refresh, 5) == NULL) {
! 155: printf(", unable to register update task\n");
! 156: return;
! 157: }
! 158:
! 159: for (i = 0; i < (sc->sc_noexternal ? 1 : ADMTEMP_NUM_SENSORS); i++)
! 160: sensor_attach(&sc->sc_sensordev, &sc->sc_sensor[i]);
! 161: sensordev_install(&sc->sc_sensordev);
! 162:
! 163: printf("\n");
! 164: }
! 165:
! 166: void
! 167: admtemp_refresh(void *arg)
! 168: {
! 169: struct admtemp_softc *sc = arg;
! 170: u_int8_t cmd;
! 171: int8_t sdata;
! 172:
! 173: iic_acquire_bus(sc->sc_tag, 0);
! 174:
! 175: if (sc->sc_noexternal == 0) {
! 176: cmd = ADM1021_EXT_TEMP;
! 177: if (iic_exec(sc->sc_tag, I2C_OP_READ_WITH_STOP, sc->sc_addr,
! 178: &cmd, sizeof cmd, &sdata, sizeof sdata, 0) == 0) {
! 179: if (sdata == 0x7f) {
! 180: sc->sc_sensor[ADMTEMP_EXT].flags |= SENSOR_FINVALID;
! 181: } else {
! 182: sc->sc_sensor[ADMTEMP_EXT].value =
! 183: 273150000 + 1000000 * sdata;
! 184: sc->sc_sensor[ADMTEMP_EXT].flags &= ~SENSOR_FINVALID;
! 185: }
! 186: }
! 187: } else
! 188: sc->sc_sensor[ADMTEMP_EXT].flags |= SENSOR_FINVALID;
! 189:
! 190:
! 191: cmd = ADM1021_INT_TEMP;
! 192: if (iic_exec(sc->sc_tag, I2C_OP_READ_WITH_STOP, sc->sc_addr,
! 193: &cmd, sizeof cmd, &sdata, sizeof sdata, 0) == 0) {
! 194: if (sdata == 0x7f) {
! 195: sc->sc_sensor[ADMTEMP_INT].flags |= SENSOR_FINVALID;
! 196: } else {
! 197: sc->sc_sensor[ADMTEMP_INT].value =
! 198: 273150000 + 1000000 * sdata;
! 199: sc->sc_sensor[ADMTEMP_INT].flags &= ~SENSOR_FINVALID;
! 200: }
! 201: }
! 202:
! 203: iic_release_bus(sc->sc_tag, 0);
! 204: }
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