diff options
Diffstat (limited to 'sys/dev/i2c/tmhc50.c')
| -rw-r--r-- | sys/dev/i2c/tmhc50.c | 151 |
1 files changed, 151 insertions, 0 deletions
diff --git a/sys/dev/i2c/tmhc50.c b/sys/dev/i2c/tmhc50.c new file mode 100644 index 00000000000..c23811a3419 --- /dev/null +++ b/sys/dev/i2c/tmhc50.c @@ -0,0 +1,151 @@ +/* $OpenBSD: tmhc50.c,v 1.1 2007/09/09 00:20:30 deraadt Exp $ */ + +/* + * Copyright (c) 2007 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> + +/* ADM 1022 registers */ +#define THMC50_TEMP0 0x27 +#define THMC50_TEMP1 0x26 +#define THMC50_TEMP2 0x20 + +/* Sensors */ +#define THMC_TEMP0 0 +#define THMC_TEMP1 1 +#define THMC_TEMP2 2 +#define THMC_NUM_SENSORS 3 + +struct thmc_softc { + struct device sc_dev; + i2c_tag_t sc_tag; + i2c_addr_t sc_addr; + + struct ksensor sc_sensor[THMC_NUM_SENSORS]; + struct ksensordev sc_sensordev; +}; + +int thmc_match(struct device *, void *, void *); +void thmc_attach(struct device *, struct device *, void *); +void thmc_refresh(void *); + +struct cfattach thmc_ca = { + sizeof(struct thmc_softc), thmc_match, thmc_attach +}; + +struct cfdriver thmc_cd = { + NULL, "thmc", DV_DULL +}; + +int +thmc_match(struct device *parent, void *match, void *aux) +{ + struct i2c_attach_args *ia = aux; + + if (strcmp(ia->ia_name, "thmc50") == 0 || + strcmp(ia->ia_name, "adm1022") == 0 || + strcmp(ia->ia_name, "adm1028") == 0) + return (1); + return (0); +} + +void +thmc_attach(struct device *parent, struct device *self, void *aux) +{ + struct thmc_softc *sc = (struct thmc_softc *)self; + struct i2c_attach_args *ia = aux; + int numsensors = THMC_NUM_SENSORS; + 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[THMC_TEMP0].type = SENSOR_TEMP; + strlcpy(sc->sc_sensor[THMC_TEMP0].desc, "Internal", + sizeof(sc->sc_sensor[THMC_TEMP0].desc)); + + sc->sc_sensor[THMC_TEMP1].type = SENSOR_TEMP; + strlcpy(sc->sc_sensor[THMC_TEMP1].desc, "External", + sizeof(sc->sc_sensor[THMC_TEMP1].desc)); + + if (strcmp(ia->ia_name, "adm1022") == 0) { + /* Only the adm1022 has a THMC50_TEMP2 sensor */ + sc->sc_sensor[THMC_TEMP2].type = SENSOR_TEMP; + strlcpy(sc->sc_sensor[THMC_TEMP2].desc, "External", + sizeof(sc->sc_sensor[THMC_TEMP2].desc)); + } else { + sc->sc_sensor[THMC_TEMP2].type = -1; + numsensors--; + } + + if (sensor_task_register(sc, thmc_refresh, 5) == NULL) { + printf(", unable to register update task\n"); + return; + } + + for (i = 0; i < numsensors; i++) + sensor_attach(&sc->sc_sensordev, &sc->sc_sensor[i]); + sensordev_install(&sc->sc_sensordev); + + printf("\n"); +} + +void +thmc_refresh(void *arg) +{ + struct thmc_softc *sc = arg; + u_int8_t cmd; + int8_t sdata; + + iic_acquire_bus(sc->sc_tag, 0); + + cmd = THMC50_TEMP0; + if (iic_exec(sc->sc_tag, I2C_OP_READ_WITH_STOP, + sc->sc_addr, &cmd, sizeof cmd, &sdata, sizeof sdata, 0) == 0) { + sc->sc_sensor[THMC_TEMP0].value = 273150000 + 1000000 * sdata; + sc->sc_sensor[THMC_TEMP0].flags &= ~SENSOR_FINVALID; + } else + sc->sc_sensor[THMC_TEMP0].flags &= ~SENSOR_FINVALID; + + cmd = THMC50_TEMP1; + if (iic_exec(sc->sc_tag, I2C_OP_READ_WITH_STOP, + sc->sc_addr, &cmd, sizeof cmd, &sdata, sizeof sdata, 0) == 0) { + sc->sc_sensor[THMC_TEMP1].value = 273150000 + 1000000 * sdata; + sc->sc_sensor[THMC_TEMP1].flags &= ~SENSOR_FINVALID; + } else + sc->sc_sensor[THMC_TEMP1].flags &= ~SENSOR_FINVALID; + + if (sc->sc_sensor[THMC_TEMP2].type > 0) { + cmd = THMC50_TEMP2; + if (iic_exec(sc->sc_tag, I2C_OP_READ_WITH_STOP, + sc->sc_addr, &cmd, sizeof cmd, &sdata, sizeof sdata, 0) == 0) { + sc->sc_sensor[THMC_TEMP2].value = 273150000 + 1000000 * sdata; + sc->sc_sensor[THMC_TEMP2].flags &= ~SENSOR_FINVALID; + } else + sc->sc_sensor[THMC_TEMP2].flags &= ~SENSOR_FINVALID; + } + + iic_release_bus(sc->sc_tag, 0); +} |