143 lines
4.1 KiB
C
143 lines
4.1 KiB
C
/* $OpenBSD: sdtemp.c,v 1.16 2022/04/06 18:59:28 naddy Exp $ */
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/*
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* Copyright (c) 2008 Theo de Raadt
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*
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* Permission to use, copy, modify, and distribute this software for any
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* purpose with or without fee is hereby granted, provided that the above
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* copyright notice and this permission notice appear in all copies.
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*
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* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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*/
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/device.h>
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#include <sys/sensors.h>
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#include <dev/i2c/i2cvar.h>
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/* JEDEC JC-42.4 registers */
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#define JC_TEMP 0x05
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/* Sensors */
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#define JCTEMP_TEMP 0
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#define JCTEMP_NUM_SENSORS 1
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struct sdtemp_softc {
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struct device sc_dev;
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i2c_tag_t sc_tag;
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i2c_addr_t sc_addr;
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struct ksensor sc_sensor[JCTEMP_NUM_SENSORS];
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struct ksensordev sc_sensordev;
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};
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int sdtemp_match(struct device *, void *, void *);
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void sdtemp_attach(struct device *, struct device *, void *);
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void sdtemp_refresh(void *);
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const struct cfattach sdtemp_ca = {
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sizeof(struct sdtemp_softc), sdtemp_match, sdtemp_attach
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};
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struct cfdriver sdtemp_cd = {
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NULL, "sdtemp", DV_DULL
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};
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int
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sdtemp_match(struct device *parent, void *match, void *aux)
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{
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struct i2c_attach_args *ia = aux;
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if (strcmp(ia->ia_name, "se97") == 0 ||
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strcmp(ia->ia_name, "se98") == 0 ||
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strcmp(ia->ia_name, "max6604") == 0 ||
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strcmp(ia->ia_name, "mcp9804") == 0 ||
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strcmp(ia->ia_name, "mcp9805") == 0 ||
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strcmp(ia->ia_name, "mcp98242") == 0 ||
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strcmp(ia->ia_name, "mcp98243") == 0 ||
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strcmp(ia->ia_name, "mcp98244") == 0 ||
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strcmp(ia->ia_name, "adt7408") == 0 ||
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strcmp(ia->ia_name, "stts424e02") == 0 ||
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strcmp(ia->ia_name, "stts424") == 0 ||
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strcmp(ia->ia_name, "stts2002") == 0 ||
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strcmp(ia->ia_name, "stts2004") == 0 ||
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strcmp(ia->ia_name, "stts3000") == 0 ||
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strcmp(ia->ia_name, "ts3000b3") == 0 ||
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strcmp(ia->ia_name, "ts3000gb0") == 0 ||
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strcmp(ia->ia_name, "ts3000gb2") == 0 ||
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strcmp(ia->ia_name, "ts3001gb2") == 0 ||
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strcmp(ia->ia_name, "tse2004gb2") == 0 ||
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strcmp(ia->ia_name, "at30ts00") == 0 ||
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strcmp(ia->ia_name, "at30tse004") == 0 ||
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strcmp(ia->ia_name, "cat34ts02") == 0 ||
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strcmp(ia->ia_name, "cat34ts02c") == 0 ||
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strcmp(ia->ia_name, "cat34ts04") == 0 ||
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strcmp(ia->ia_name, "gt30ts00") == 0 ||
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strcmp(ia->ia_name, "gt34ts02") == 0)
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return (1);
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return (0);
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}
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void
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sdtemp_attach(struct device *parent, struct device *self, void *aux)
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{
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struct sdtemp_softc *sc = (struct sdtemp_softc *)self;
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struct i2c_attach_args *ia = aux;
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sc->sc_tag = ia->ia_tag;
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sc->sc_addr = ia->ia_addr;
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printf(": %s", ia->ia_name);
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/* Initialize sensor data. */
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strlcpy(sc->sc_sensordev.xname, sc->sc_dev.dv_xname,
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sizeof(sc->sc_sensordev.xname));
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sc->sc_sensor[JCTEMP_TEMP].type = SENSOR_TEMP;
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if (sensor_task_register(sc, sdtemp_refresh, 5) == NULL) {
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printf(", unable to register update task\n");
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return;
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}
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sensor_attach(&sc->sc_sensordev, &sc->sc_sensor[0]);
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sensordev_install(&sc->sc_sensordev);
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printf("\n");
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}
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void
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sdtemp_refresh(void *arg)
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{
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struct sdtemp_softc *sc = arg;
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u_int8_t cmd;
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int16_t data, sdata;
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iic_acquire_bus(sc->sc_tag, 0);
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cmd = JC_TEMP;
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if (iic_exec(sc->sc_tag, I2C_OP_READ_WITH_STOP, sc->sc_addr,
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&cmd, sizeof cmd, &data, sizeof data, 0) == 0) {
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sdata = betoh16(data) & 0x1fff;
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if (sdata & 0x1000)
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sdata -= 0x2000;
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sc->sc_sensor[JCTEMP_TEMP].value =
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273150000 + 62500 * sdata;
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sc->sc_sensor[JCTEMP_TEMP].flags &= ~SENSOR_FINVALID;
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#if 0
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printf("sdtemp %04x %04x %d\n", data & 0xffff,
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(u_int)sdata & 0xffff,
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sc->sc_sensor[JCTEMP_TEMP].value);
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#endif
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}
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iic_release_bus(sc->sc_tag, 0);
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}
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