/*      $OpenBSD: adm1026.c,v 1.12 2022/04/06 18:59:28 naddy Exp $      */

/*
 * Copyright (c) 2005 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 1026 registers */
#define ADM1026_TEMP            0x1f
#define ADM1026_STATUS          0x20
#define ADM1026_Vbat            0x26
#define ADM1026_Ain8            0x27
#define ADM1026_EXT1            0x28
#define ADM1026_EXT2            0x29
#define ADM1026_V3_3stby        0x2a
#define ADM1026_V3_3main        0x2b
#define ADM1026_V5              0x2c
#define ADM1026_Vccp            0x2d
#define ADM1026_V12             0x2e
#define ADM1026_Vminus12        0x2f
#define ADM1026_FAN0            0x38
#define ADM1026_FAN1            0x39
#define ADM1026_FAN2            0x3a
#define ADM1026_FAN3            0x3b
#define ADM1026_FAN4            0x3c
#define ADM1026_FAN5            0x3d
#define ADM1026_FAN6            0x3e
#define ADM1026_FAN7            0x3f
#define ADM1026_EXT1_OFF        0x6e
#define ADM1026_EXT2_OFF        0x6f
#define ADM1026_FAN0123DIV      0x02
#define ADM1026_FAN4567DIV      0x03
#define ADM1026_CONTROL         0x00
#define  ADM1026_CONTROL_START  0x01
#define  ADM1026_CONTROL_INTCLR 0x04

/* Sensors */
#define ADMCTS_TEMP             0
#define ADMCTS_EXT1             1
#define ADMCTS_EXT2             2
#define ADMCTS_Vbat             3
#define ADMCTS_V3_3stby         4
#define ADMCTS_V3_3main         5
#define ADMCTS_V5               6
#define ADMCTS_Vccp             7
#define ADMCTS_V12              8
#define ADMCTS_Vminus12         9
#define ADMCTS_FAN0             10
#define ADMCTS_FAN1             11
#define ADMCTS_FAN2             12
#define ADMCTS_FAN3             13
#define ADMCTS_FAN4             14
#define ADMCTS_FAN5             15
#define ADMCTS_FAN6             16
#define ADMCTS_FAN7             17
#define ADMCTS_NUM_SENSORS      18

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

        struct ksensor  sc_sensor[ADMCTS_NUM_SENSORS];
        struct ksensordev sc_sensordev;
        int             sc_fanmul[8];
};

int     admcts_match(struct device *, void *, void *);
void    admcts_attach(struct device *, struct device *, void *);
void    admcts_refresh(void *);

const struct cfattach admcts_ca = {
        sizeof(struct admcts_softc), admcts_match, admcts_attach
};

struct cfdriver admcts_cd = {
        NULL, "admcts", DV_DULL
};

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

        if (strcmp(ia->ia_name, "adm1026") == 0)
                return (1);
        return (0);
}

void
admcts_attach(struct device *parent, struct device *self, void *aux)
{
        struct admcts_softc *sc = (struct admcts_softc *)self;
        struct i2c_attach_args *ia = aux;
        u_int8_t cmd, data, data2;
        int i;

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

        iic_acquire_bus(sc->sc_tag, 0);
        cmd = ADM1026_CONTROL;
        if (iic_exec(sc->sc_tag, I2C_OP_READ_WITH_STOP,
            sc->sc_addr, &cmd, sizeof cmd, &data, sizeof data, 0)) {
                iic_release_bus(sc->sc_tag, 0);
                printf(": cannot get control register\n");
                return;
        }
        data2 = data | ADM1026_CONTROL_START;
        data2 = data2 & ~ADM1026_CONTROL_INTCLR;
        if (data != data2) {
                if (iic_exec(sc->sc_tag, I2C_OP_WRITE_WITH_STOP,
                    sc->sc_addr, &cmd, sizeof cmd, &data2, sizeof data2, 0)) {
                        iic_release_bus(sc->sc_tag, 0);
                        printf(": cannot set control register\n");
                        return;
                }
        }

        cmd = ADM1026_FAN0123DIV;
        if (iic_exec(sc->sc_tag, I2C_OP_READ_WITH_STOP,
            sc->sc_addr, &cmd, sizeof cmd, &data, sizeof data, 0)) {
                iic_release_bus(sc->sc_tag, 0);
                printf(": cannot get fan0123div register\n");
                return;
        }
        sc->sc_fanmul[0] = (1 << ((data >> 0) & 0x3));
        sc->sc_fanmul[1] = (1 << ((data >> 2) & 0x3));
        sc->sc_fanmul[2] = (1 << ((data >> 4) & 0x3));
        sc->sc_fanmul[3] = (1 << ((data >> 6) & 0x3));

        cmd = ADM1026_FAN4567DIV;
        if (iic_exec(sc->sc_tag, I2C_OP_READ_WITH_STOP,
            sc->sc_addr, &cmd, sizeof cmd, &data, sizeof data, 0)) {
                iic_release_bus(sc->sc_tag, 0);
                printf(": cannot get fan0123div register\n");
                return;
        }
        sc->sc_fanmul[4] = (1 << ((data >> 0) & 0x3));
        sc->sc_fanmul[5] = (1 << ((data >> 2) & 0x3));
        sc->sc_fanmul[6] = (1 << ((data >> 4) & 0x3));
        sc->sc_fanmul[7] = (1 << ((data >> 6) & 0x3));

        iic_release_bus(sc->sc_tag, 0);

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

        sc->sc_sensor[ADMCTS_TEMP].type = SENSOR_TEMP;
        strlcpy(sc->sc_sensor[ADMCTS_TEMP].desc, "Internal",
            sizeof(sc->sc_sensor[ADMCTS_TEMP].desc));

        sc->sc_sensor[ADMCTS_Vbat].type = SENSOR_VOLTS_DC;
        strlcpy(sc->sc_sensor[ADMCTS_Vbat].desc, "Vbat",
            sizeof(sc->sc_sensor[ADMCTS_Vbat].desc));

        sc->sc_sensor[ADMCTS_EXT1].type = SENSOR_TEMP;
        strlcpy(sc->sc_sensor[ADMCTS_EXT1].desc, "External",
            sizeof(sc->sc_sensor[ADMCTS_EXT1].desc));

        sc->sc_sensor[ADMCTS_EXT2].type = SENSOR_TEMP;
        strlcpy(sc->sc_sensor[ADMCTS_EXT2].desc, "External",
            sizeof(sc->sc_sensor[ADMCTS_EXT2].desc));

        sc->sc_sensor[ADMCTS_V3_3stby].type = SENSOR_VOLTS_DC;
        strlcpy(sc->sc_sensor[ADMCTS_V3_3stby].desc, "3.3 V standby",
            sizeof(sc->sc_sensor[ADMCTS_V3_3stby].desc));

        sc->sc_sensor[ADMCTS_V3_3main].type = SENSOR_VOLTS_DC;
        strlcpy(sc->sc_sensor[ADMCTS_V3_3main].desc, "3.3 V main",
            sizeof(sc->sc_sensor[ADMCTS_V3_3main].desc));

        sc->sc_sensor[ADMCTS_V5].type = SENSOR_VOLTS_DC;
        strlcpy(sc->sc_sensor[ADMCTS_V5].desc, "5 V",
            sizeof(sc->sc_sensor[ADMCTS_V5].desc));

        sc->sc_sensor[ADMCTS_Vccp].type = SENSOR_VOLTS_DC;
        strlcpy(sc->sc_sensor[ADMCTS_Vccp].desc, "Vccp",
            sizeof(sc->sc_sensor[ADMCTS_Vccp].desc));

        sc->sc_sensor[ADMCTS_V12].type = SENSOR_VOLTS_DC;
        strlcpy(sc->sc_sensor[ADMCTS_V12].desc, "12 V",
            sizeof(sc->sc_sensor[ADMCTS_V12].desc));

        sc->sc_sensor[ADMCTS_Vminus12].type = SENSOR_VOLTS_DC;
        strlcpy(sc->sc_sensor[ADMCTS_Vminus12].desc, "-12 V",
            sizeof(sc->sc_sensor[ADMCTS_Vminus12].desc));

        sc->sc_sensor[ADMCTS_FAN1].type = SENSOR_FANRPM;
        sc->sc_sensor[ADMCTS_FAN2].type = SENSOR_FANRPM;
        sc->sc_sensor[ADMCTS_FAN3].type = SENSOR_FANRPM;
        sc->sc_sensor[ADMCTS_FAN4].type = SENSOR_FANRPM;
        sc->sc_sensor[ADMCTS_FAN5].type = SENSOR_FANRPM;
        sc->sc_sensor[ADMCTS_FAN6].type = SENSOR_FANRPM;
        sc->sc_sensor[ADMCTS_FAN7].type = SENSOR_FANRPM;

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

        for (i = 0; i < ADMCTS_NUM_SENSORS; i++)
                sensor_attach(&sc->sc_sensordev, &sc->sc_sensor[i]);
        sensordev_install(&sc->sc_sensordev);

        printf("\n");
}

static void
fanval(struct ksensor *sens, int mul, u_int8_t data)
{
        int tmp = data * mul;

        if (tmp == 0)
                sens->flags |= SENSOR_FINVALID;
        else
                sens->value = 1630000 / tmp;
}

void
admcts_refresh(void *arg)
{
        struct admcts_softc *sc = arg;
        u_int8_t cmd, data;
        int8_t sdata;

        iic_acquire_bus(sc->sc_tag, 0);

        cmd = ADM1026_TEMP;
        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[ADMCTS_TEMP].value = 273150000 + 1000000 * sdata;

        cmd = ADM1026_EXT1;
        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[ADMCTS_EXT1].value = 273150000 + 1000000 * sdata;

        cmd = ADM1026_EXT2;
        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[ADMCTS_EXT2].value = 273150000 + 1000000 * sdata;

        cmd = ADM1026_Vbat;
        if (iic_exec(sc->sc_tag, I2C_OP_READ_WITH_STOP,
            sc->sc_addr, &cmd, sizeof cmd, &data, sizeof data, 0) == 0)
                sc->sc_sensor[ADMCTS_Vbat].value = 3000000 * data / 192;

        cmd = ADM1026_V3_3stby;
        if (iic_exec(sc->sc_tag, I2C_OP_READ_WITH_STOP,
            sc->sc_addr, &cmd, sizeof cmd, &data, sizeof data, 0) == 0)
                sc->sc_sensor[ADMCTS_V3_3stby].value = 3300000 * data / 192;

        cmd = ADM1026_V3_3main;
        if (iic_exec(sc->sc_tag, I2C_OP_READ_WITH_STOP,
            sc->sc_addr, &cmd, sizeof cmd, &data, sizeof data, 0) == 0)
                sc->sc_sensor[ADMCTS_V3_3main].value = 3300000 * data / 192;

        cmd = ADM1026_V5;
        if (iic_exec(sc->sc_tag, I2C_OP_READ_WITH_STOP,
            sc->sc_addr, &cmd, sizeof cmd, &data, sizeof data, 0) == 0)
                sc->sc_sensor[ADMCTS_V5].value = 5500000 * data / 192;

        cmd = ADM1026_Vccp;
        if (iic_exec(sc->sc_tag, I2C_OP_READ_WITH_STOP,
            sc->sc_addr, &cmd, sizeof cmd, &data, sizeof data, 0) == 0)
                sc->sc_sensor[ADMCTS_Vccp].value = 2250000 * data / 192;

        cmd = ADM1026_V12;
        if (iic_exec(sc->sc_tag, I2C_OP_READ_WITH_STOP,
            sc->sc_addr, &cmd, sizeof cmd, &data, sizeof data, 0) == 0)
                sc->sc_sensor[ADMCTS_V12].value = 12000000 * data / 192;

        cmd = ADM1026_Vminus12;
        if (iic_exec(sc->sc_tag, I2C_OP_READ_WITH_STOP,
            sc->sc_addr, &cmd, sizeof cmd, &data, sizeof data, 0) == 0)
                sc->sc_sensor[ADMCTS_Vminus12].value = -2125000 * data / 192;

        cmd = ADM1026_FAN0;
        if (iic_exec(sc->sc_tag, I2C_OP_READ_WITH_STOP,
            sc->sc_addr, &cmd, sizeof cmd, &data, sizeof data, 0) == 0)
                fanval(&sc->sc_sensor[ADMCTS_FAN0], sc->sc_fanmul[0], data);

        cmd = ADM1026_FAN1;
        if (iic_exec(sc->sc_tag, I2C_OP_READ_WITH_STOP,
            sc->sc_addr, &cmd, sizeof cmd, &data, sizeof data, 0) == 0)
                fanval(&sc->sc_sensor[ADMCTS_FAN1], sc->sc_fanmul[1], data);

        cmd = ADM1026_FAN2;
        if (iic_exec(sc->sc_tag, I2C_OP_READ_WITH_STOP,
            sc->sc_addr, &cmd, sizeof cmd, &data, sizeof data, 0) == 0)
                fanval(&sc->sc_sensor[ADMCTS_FAN2], sc->sc_fanmul[2], data);

        cmd = ADM1026_FAN3;
        if (iic_exec(sc->sc_tag, I2C_OP_READ_WITH_STOP,
            sc->sc_addr, &cmd, sizeof cmd, &data, sizeof data, 0) == 0)
                fanval(&sc->sc_sensor[ADMCTS_FAN3], sc->sc_fanmul[3], data);

        cmd = ADM1026_FAN4;
        if (iic_exec(sc->sc_tag, I2C_OP_READ_WITH_STOP,
            sc->sc_addr, &cmd, sizeof cmd, &data, sizeof data, 0) == 0)
                fanval(&sc->sc_sensor[ADMCTS_FAN4], sc->sc_fanmul[4], data);

        cmd = ADM1026_FAN5;
        if (iic_exec(sc->sc_tag, I2C_OP_READ_WITH_STOP,
            sc->sc_addr, &cmd, sizeof cmd, &data, sizeof data, 0) == 0)
                fanval(&sc->sc_sensor[ADMCTS_FAN5], sc->sc_fanmul[5], data);

        cmd = ADM1026_FAN6;
        if (iic_exec(sc->sc_tag, I2C_OP_READ_WITH_STOP,
            sc->sc_addr, &cmd, sizeof cmd, &data, sizeof data, 0) == 0)
                fanval(&sc->sc_sensor[ADMCTS_FAN6], sc->sc_fanmul[6], data);

        cmd = ADM1026_FAN7;
        if (iic_exec(sc->sc_tag, I2C_OP_READ_WITH_STOP,
            sc->sc_addr, &cmd, sizeof cmd, &data, sizeof data, 0) == 0)
                fanval(&sc->sc_sensor[ADMCTS_FAN7], sc->sc_fanmul[7], data);

        iic_release_bus(sc->sc_tag, 0);
}