diff options
| -rw-r--r-- | sys/dev/i2c/adt7462.c | 121 | ||||
| -rw-r--r-- | sys/dev/i2c/files.i2c | 6 |
2 files changed, 126 insertions, 1 deletions
diff --git a/sys/dev/i2c/adt7462.c b/sys/dev/i2c/adt7462.c new file mode 100644 index 00000000000..0b469aed525 --- /dev/null +++ b/sys/dev/i2c/adt7462.c @@ -0,0 +1,121 @@ +/* $OpenBSD: adt7462.c,v 1.1 2008/04/21 04:48:25 deraadt Exp $ */ + +/* + * Copyright (c) 2008 Theo de Raadt + * + * Permission to use, copy, modify, and distribute this software for any + * purpose with or without fee is hereby granted, provided that the above + * copyright notice and this permission notice appear in all copies. + * + * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES + * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR + * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES + * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN + * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF + * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. + */ + +#include <sys/param.h> +#include <sys/systm.h> +#include <sys/device.h> +#include <sys/sensors.h> + +#include <dev/i2c/i2cvar.h> + +#define ADT7462_INT_TEMPL 0x88 +#define ADT7462_INT_TEMPH 0x89 + +/* Sensors */ +#define ADTFSM_INT 0 +#define ADTFSM_NUM_SENSORS 1 + +struct adtfsm_softc { + struct device sc_dev; + i2c_tag_t sc_tag; + i2c_addr_t sc_addr; + int sc_fanmul; + + struct ksensor sc_sensor[ADTFSM_NUM_SENSORS]; + struct ksensordev sc_sensordev; +}; + +int adtfsm_match(struct device *, void *, void *); +void adtfsm_attach(struct device *, struct device *, void *); +void adtfsm_refresh(void *); + +struct cfattach adtfsm_ca = { + sizeof(struct adtfsm_softc), adtfsm_match, adtfsm_attach +}; + +struct cfdriver adtfsm_cd = { + NULL, "adtfsm", DV_DULL +}; + +int +adtfsm_match(struct device *parent, void *match, void *aux) +{ + struct i2c_attach_args *ia = aux; + + if (strcmp(ia->ia_name, "adt7462") == 0) + return (1); + return (0); +} + +void +adtfsm_attach(struct device *parent, struct device *self, void *aux) +{ + struct adtfsm_softc *sc = (struct adtfsm_softc *)self; + struct i2c_attach_args *ia = aux; + int i; + + sc->sc_tag = ia->ia_tag; + sc->sc_addr = ia->ia_addr; + + /* Initialize sensor data. */ + strlcpy(sc->sc_sensordev.xname, sc->sc_dev.dv_xname, + sizeof(sc->sc_sensordev.xname)); + + sc->sc_sensor[ADTFSM_INT].type = SENSOR_TEMP; + strlcpy(sc->sc_sensor[ADTFSM_INT].desc, "Internal", + sizeof(sc->sc_sensor[ADTFSM_INT].desc)); + + if (sensor_task_register(sc, adtfsm_refresh, 5) == NULL) { + printf(", unable to register update task\n"); + return; + } + + for (i = 0; i < ADTFSM_NUM_SENSORS; i++) + sensor_attach(&sc->sc_sensordev, &sc->sc_sensor[i]); + sensordev_install(&sc->sc_sensordev); + + printf("\n"); +} + +void +adtfsm_refresh(void *arg) +{ + struct adtfsm_softc *sc = arg; + u_int8_t cmdh, cmdl, datah = 0x01, datal = 0x02; + short t; + + iic_acquire_bus(sc->sc_tag, 0); + + cmdl = ADT7462_INT_TEMPL; + cmdh = ADT7462_INT_TEMPH; + if (iic_exec(sc->sc_tag, I2C_OP_READ_WITH_STOP, + sc->sc_addr, &cmdl, sizeof cmdl, &datal, sizeof datal, 0) == 0 && + iic_exec(sc->sc_tag, I2C_OP_READ_WITH_STOP, + sc->sc_addr, &cmdh, sizeof cmdh, &datah, sizeof datah, 0) == 0) { + t = datah << 2; + t += (datah < 64 ? -1 : 1) * (datal >> 6); + t -= (64 << 2); + sc->sc_sensor[ADTFSM_INT].value = 273150000 + t * 250000; + sc->sc_sensor[ADTFSM_INT].flags &= ~SENSOR_FINVALID; + } else + sc->sc_sensor[ADTFSM_INT].flags |= SENSOR_FINVALID; + + printf("val %02x %02x\n", datah, datal); + + iic_release_bus(sc->sc_tag, 0); +} diff --git a/sys/dev/i2c/files.i2c b/sys/dev/i2c/files.i2c index 205158cc824..79143eaebe1 100644 --- a/sys/dev/i2c/files.i2c +++ b/sys/dev/i2c/files.i2c @@ -1,4 +1,4 @@ -# $OpenBSD: files.i2c,v 1.45 2008/04/07 01:31:44 deraadt Exp $ +# $OpenBSD: files.i2c,v 1.46 2008/04/21 04:48:25 deraadt Exp $ # $NetBSD: files.i2c,v 1.3 2003/10/20 16:24:10 briggs Exp $ define i2c {[addr = -1], [size = -1]} @@ -157,3 +157,7 @@ file dev/i2c/spdmem.c spdmem device sdtemp attach sdtemp at i2c file dev/i2c/sdtemp.c sdtemp + +device adtfsm +attach adtfsm at i2c +file dev/i2c/adt7462.c adtfsm |