/*      $OpenBSD: sdtemp.c,v 1.16 2022/04/06 18:59:28 naddy 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>

/* JEDEC JC-42.4 registers */
#define JC_TEMP                 0x05

/* Sensors */
#define JCTEMP_TEMP             0
#define JCTEMP_NUM_SENSORS      1

struct sdtemp_softc {
        struct device   sc_dev;
        i2c_tag_t       sc_tag;
        i2c_addr_t      sc_addr;

        struct ksensor  sc_sensor[JCTEMP_NUM_SENSORS];
        struct ksensordev sc_sensordev;
};

int     sdtemp_match(struct device *, void *, void *);
void    sdtemp_attach(struct device *, struct device *, void *);
void    sdtemp_refresh(void *);

const struct cfattach sdtemp_ca = {
        sizeof(struct sdtemp_softc), sdtemp_match, sdtemp_attach
};

struct cfdriver sdtemp_cd = {
        NULL, "sdtemp", DV_DULL
};

int
sdtemp_match(struct device *parent, void *match, void *aux)
{
        struct i2c_attach_args *ia = aux;

        if (strcmp(ia->ia_name, "se97") == 0 ||
            strcmp(ia->ia_name, "se98") == 0 ||
            strcmp(ia->ia_name, "max6604") == 0 ||
            strcmp(ia->ia_name, "mcp9804") == 0 ||
            strcmp(ia->ia_name, "mcp9805") == 0 ||
            strcmp(ia->ia_name, "mcp98242") == 0 ||
            strcmp(ia->ia_name, "mcp98243") == 0 ||
            strcmp(ia->ia_name, "mcp98244") == 0 ||
            strcmp(ia->ia_name, "adt7408") == 0 ||
            strcmp(ia->ia_name, "stts424e02") == 0 ||
            strcmp(ia->ia_name, "stts424") == 0 ||
            strcmp(ia->ia_name, "stts2002") == 0 ||
            strcmp(ia->ia_name, "stts2004") == 0 ||
            strcmp(ia->ia_name, "stts3000") == 0 ||
            strcmp(ia->ia_name, "ts3000b3") == 0 ||
            strcmp(ia->ia_name, "ts3000gb0") == 0 ||
            strcmp(ia->ia_name, "ts3000gb2") == 0 ||
            strcmp(ia->ia_name, "ts3001gb2") == 0 ||
            strcmp(ia->ia_name, "tse2004gb2") == 0 ||
            strcmp(ia->ia_name, "at30ts00") == 0 ||
            strcmp(ia->ia_name, "at30tse004") == 0 ||
            strcmp(ia->ia_name, "cat34ts02") == 0 ||
            strcmp(ia->ia_name, "cat34ts02c") == 0 ||
            strcmp(ia->ia_name, "cat34ts04") == 0 ||
            strcmp(ia->ia_name, "gt30ts00") == 0 ||
            strcmp(ia->ia_name, "gt34ts02") == 0)
                return (1);
        return (0);
}

void
sdtemp_attach(struct device *parent, struct device *self, void *aux)
{
        struct sdtemp_softc *sc = (struct sdtemp_softc *)self;
        struct i2c_attach_args *ia = aux;

        sc->sc_tag = ia->ia_tag;
        sc->sc_addr = ia->ia_addr;

        printf(": %s", ia->ia_name);

        /* Initialize sensor data. */
        strlcpy(sc->sc_sensordev.xname, sc->sc_dev.dv_xname,
            sizeof(sc->sc_sensordev.xname));

        sc->sc_sensor[JCTEMP_TEMP].type = SENSOR_TEMP;

        if (sensor_task_register(sc, sdtemp_refresh, 5) == NULL) {
                printf(", unable to register update task\n");
                return;
        }

        sensor_attach(&sc->sc_sensordev, &sc->sc_sensor[0]);
        sensordev_install(&sc->sc_sensordev);

        printf("\n");
}

void
sdtemp_refresh(void *arg)
{
        struct sdtemp_softc *sc = arg;
        u_int8_t cmd;
        int16_t data, sdata;

        iic_acquire_bus(sc->sc_tag, 0);

        cmd = JC_TEMP;
        if (iic_exec(sc->sc_tag, I2C_OP_READ_WITH_STOP, sc->sc_addr,
            &cmd, sizeof cmd, &data, sizeof data, 0) == 0) {
                sdata = betoh16(data) & 0x1fff;
                if (sdata & 0x1000)
                        sdata -= 0x2000;
                sc->sc_sensor[JCTEMP_TEMP].value =
                    273150000 + 62500 * sdata;
                sc->sc_sensor[JCTEMP_TEMP].flags &= ~SENSOR_FINVALID;
#if 0
                printf("sdtemp %04x %04x %d\n", data & 0xffff,
                    (u_int)sdata & 0xffff,
                    sc->sc_sensor[JCTEMP_TEMP].value);
#endif
        }

        iic_release_bus(sc->sc_tag, 0);
}