xref: /src/sys/dev/isa/itesio_isa.c

/*	$NetBSD: itesio_isa.c,v 1.30 2022/06/29 15:56:58 mlelstv Exp $ */
/*	Derived from $OpenBSD: it.c,v 1.19 2006/04/10 00:57:54 deraadt Exp $	*/

/*
 * Copyright (c) 2006-2007 Juan Romero Pardines <xtraeme (at) netbsd.org>
 * Copyright (c) 2003 Julien Bordet <zejames (at) greyhats.org>
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITD TO, THE IMPLIED WARRANTIES
 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
 * NOT LIMITD TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

/*
 * Driver for the iTE IT87xxF Super I/O. Currently supporting
 * the Environmental Controller to monitor the sensors and the
 * Watchdog Timer.
 */

#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: itesio_isa.c,v 1.30 2022/06/29 15:56:58 mlelstv Exp $");

#include <sys/param.h>
#include <sys/kernel.h>
#include <sys/device.h>
#include <sys/module.h>
#include <sys/bus.h>
#include <sys/kmem.h>

#include <dev/isa/isareg.h>
#include <dev/isa/isavar.h>

#include <dev/sysmon/sysmonvar.h>

#include <dev/isa/itesio_isavar.h>

#define IT_VOLTSTART_IDX 	3 	/* voltage start index */
#define IT_FANSTART_IDX 	12 	/* fan start index */

/* IT8625: 3 temps, 10 volts, 6 fans */
#define IT8625_NUM_SENSORS	19
#define IT8625_VOLTSTART_IDX 	3	/* voltage start index */
#define IT8625_FANSTART_IDX 	13	/* fan start index */

#if defined(ITESIO_DEBUG)
#define DPRINTF(x)		do { printf x; } while (0)
#else
#define DPRINTF(x)
#endif

/*
 * IT87-compatible chips can typically measure voltages up to 4.096 V.
 * To measure higher voltages the input is attenuated with (external)
 * resistors.  Negative voltages are measured using a reference
 * voltage.  So we have to convert the sensor values back to real
 * voltages by applying the appropriate resistor factor.
 */
#define RFACT_NONE	10000
#define RFACT(x, y)	(RFACT_NONE * ((x) + (y)) / (y))

/* autoconf(9) functions */
static int	itesio_isa_match(device_t, cfdata_t, void *);
static void	itesio_isa_attach(device_t, device_t, void *);
static int	itesio_isa_detach(device_t, int);

CFATTACH_DECL_NEW(itesio, sizeof(struct itesio_softc),
    itesio_isa_match, itesio_isa_attach, itesio_isa_detach, NULL);

/* driver functions */
static uint8_t	itesio_ecreadreg(struct itesio_softc *, int);
static void	itesio_ecwritereg(struct itesio_softc *, int, int);
static uint8_t	itesio_readreg(bus_space_tag_t, bus_space_handle_t, int);
static void	itesio_writereg(bus_space_tag_t, bus_space_handle_t, int, int);
static void	itesio_enter(bus_space_tag_t, bus_space_handle_t);
static void	itesio_exit(bus_space_tag_t, bus_space_handle_t);

/* sysmon_envsys(9) glue */
static void	itesio_setup_sensors(struct itesio_softc *);
static void	itesio_refresh_temp(struct itesio_softc *, envsys_data_t *);
static void	itesio_refresh_volts(struct itesio_softc *, envsys_data_t *);
static void	itesio_refresh_fans(struct itesio_softc *, envsys_data_t *);
static void	itesio_refresh(struct sysmon_envsys *, envsys_data_t *);
static void	itesio_refresh_it8705_fans(struct itesio_softc *,
		    envsys_data_t *);
static void	itesio_setup_it8625_sensors(struct itesio_softc *);
static void	itesio_refresh_it8625_volts(struct itesio_softc *,
		    envsys_data_t *);
static void	itesio_refresh_it8625_fans(struct itesio_softc *,
		    envsys_data_t *);

/* sysmon_wdog glue */
static bool	itesio_wdt_suspend(device_t, const pmf_qual_t *);
static int	itesio_wdt_setmode(struct sysmon_wdog *);
static int 	itesio_wdt_tickle(struct sysmon_wdog *);

/* rfact values for voltage sensors */
static const int itesio_vrfact[] = {
	RFACT_NONE,	/* VCORE_A	*/
	RFACT_NONE,	/* VCORE_B	*/
	RFACT_NONE,	/* +3.3V	*/
	RFACT(68, 100),	/* +5V 		*/
	RFACT(30, 10),	/* +12V 	*/
	RFACT(21, 10),	/* -5V 		*/
	RFACT(83, 20),	/* -12V 	*/
	RFACT(68, 100),	/* STANDBY	*/
	RFACT_NONE	/* VBAT		*/
};

static const struct itesio_config itesio_config[] = {
	{
		.chipid = ITESIO_ID8625,
		.no_wdt = true,
		.num_sensors = IT8625_NUM_SENSORS,
		.voltstart_idx = IT8625_VOLTSTART_IDX,
		.fanstart_idx = IT8625_FANSTART_IDX,
		.setup_sensors = itesio_setup_it8625_sensors,
		.refresh_volts = itesio_refresh_it8625_volts,
		.refresh_fans = itesio_refresh_it8625_fans,
	},
	{	.chipid = ITESIO_ID8628, },
	{	.chipid = ITESIO_ID8655, },
	{
		.chipid = ITESIO_ID8705,
		.no_wdt = true,
		.refresh_fans = itesio_refresh_it8705_fans,
	},
	{
		.chipid = ITESIO_ID8712,
		.refresh_fans = itesio_refresh_it8705_fans,
	},
	{	.chipid = ITESIO_ID8716, },
	{	.chipid = ITESIO_ID8718, },
	{	.chipid = ITESIO_ID8720, },
	{	.chipid = ITESIO_ID8721, },
	{	.chipid = ITESIO_ID8726, },
	{	.chipid = ITESIO_ID8728, },
	{	.chipid = ITESIO_ID8771, },
	{	.chipid = ITESIO_ID8772, },
};

static const struct itesio_config *
itesio_isa_find_config(uint16_t chipid)
{
	const struct itesio_config *ic;
	size_t i;

	for (i = 0; i < __arraycount(itesio_config); i++) {
		ic = &itesio_config[i];
		if (chipid == ic->chipid)
			return ic;
	}
	return NULL;
}

static int
itesio_isa_match(device_t parent, cfdata_t match, void *aux)
{
	struct isa_attach_args *ia = aux;
	bus_space_handle_t ioh;
	const struct itesio_config *ic;
	uint16_t cr;

	/* Must supply an address */
	if (ia->ia_nio < 1)
		return 0;

	if (ISA_DIRECT_CONFIG(ia))
		return 0;

	if (ia->ia_io[0].ir_addr == ISA_UNKNOWN_PORT)
		return 0;

	if (bus_space_map(ia->ia_iot, ia->ia_io[0].ir_addr, 2, 0, &ioh))
		return 0;

	itesio_enter(ia->ia_iot, ioh);
	cr = (itesio_readreg(ia->ia_iot, ioh, ITESIO_CHIPID1) << 8);
	cr |= itesio_readreg(ia->ia_iot, ioh, ITESIO_CHIPID2);
	itesio_exit(ia->ia_iot, ioh);
	bus_space_unmap(ia->ia_iot, ioh, 2);

	ic = itesio_isa_find_config(cr);
	if (ic == NULL)
		return 0;

	ia->ia_nio = 1;
	ia->ia_io[0].ir_size = 2;
	ia->ia_niomem = 0;
	ia->ia_nirq = 0;
	ia->ia_ndrq = 0;
	return 1;
}

static void
itesio_isa_attach(device_t parent, device_t self, void *aux)
{
	struct itesio_softc *sc = device_private(self);
	struct isa_attach_args *ia = aux;
	const struct itesio_config *ic;
	uint32_t i;
	int error;
	uint8_t cr;

	sc->sc_iot = ia->ia_iot;

	if (bus_space_map(sc->sc_iot, ia->ia_io[0].ir_addr, 2, 0,
			  &sc->sc_pnp_ioh)) {
		aprint_error(": can't map pnp i/o space\n");
		return;
	}

	aprint_naive("\n");

	/*
	 * Enter to the Super I/O MB PNP mode.
	 */
	itesio_enter(sc->sc_iot, sc->sc_pnp_ioh);
	/*
	 * Get info from the Super I/O Global Configuration Registers:
	 * Chip IDs and Device Revision.
	 */
	sc->sc_chipid = (itesio_readreg(sc->sc_iot, sc->sc_pnp_ioh,
	    ITESIO_CHIPID1) << 8);
	sc->sc_chipid |= itesio_readreg(sc->sc_iot, sc->sc_pnp_ioh,
	    ITESIO_CHIPID2);
	sc->sc_devrev = (itesio_readreg(sc->sc_iot, sc->sc_pnp_ioh,
	    ITESIO_DEVREV) & 0x0f);
	/*
	 * Select the EC LDN to get the Base Address.
	 */
	itesio_writereg(sc->sc_iot, sc->sc_pnp_ioh, ITESIO_LDNSEL,
	    ITESIO_EC_LDN);
	sc->sc_hwmon_baseaddr =
	    (itesio_readreg(sc->sc_iot, sc->sc_pnp_ioh, ITESIO_EC_MSB) << 8);
	sc->sc_hwmon_baseaddr |= itesio_readreg(sc->sc_iot, sc->sc_pnp_ioh,
	    ITESIO_EC_LSB);
	/*
	 * We are done, exit MB PNP mode.
	 */
	itesio_exit(sc->sc_iot, sc->sc_pnp_ioh);

	ic = itesio_isa_find_config(sc->sc_chipid);
	if (ic == NULL) {
		aprint_error(": unknown chipid: %04x", sc->sc_chipid);
		goto out2;
	}
	sc->sc_config = *ic;
	if (sc->sc_config.num_sensors == 0)
		sc->sc_config.num_sensors = IT_NUM_SENSORS;
	if (sc->sc_config.voltstart_idx == 0)
		sc->sc_config.voltstart_idx = IT_VOLTSTART_IDX;
	if (sc->sc_config.fanstart_idx == 0)
		sc->sc_config.fanstart_idx = IT_FANSTART_IDX;
	if (sc->sc_config.setup_sensors == NULL)
		sc->sc_config.setup_sensors = itesio_setup_sensors;
	if (sc->sc_config.refresh_temp == NULL)
		sc->sc_config.refresh_temp = itesio_refresh_temp;
	if (sc->sc_config.refresh_volts == NULL)
		sc->sc_config.refresh_volts = itesio_refresh_volts;
	if (sc->sc_config.refresh_fans == NULL)
		sc->sc_config.refresh_fans = itesio_refresh_fans;

	aprint_normal(": iTE IT%4xF Super I/O (rev %d)\n",
	    sc->sc_chipid, sc->sc_devrev);
	aprint_normal_dev(self, "Hardware Monitor registers at 0x%x\n",
	    sc->sc_hwmon_baseaddr);

	if (bus_space_map(sc->sc_iot, sc->sc_hwmon_baseaddr, 8, 0,
	    &sc->sc_ec_ioh)) {
		aprint_error_dev(self, "cannot map hwmon i/o space\n");
		goto out2;
	}

	sc->sc_hwmon_mapped = true;

	/* Activate monitoring */
	cr = itesio_ecreadreg(sc, ITESIO_EC_CONFIG);
	SET(cr, 0x01);
	itesio_ecwritereg(sc, ITESIO_EC_CONFIG, cr);

#ifdef notyet
	/* Enable beep alarms */
	cr = itesio_ecreadreg(sc, ITESIO_EC_BEEPEER);
	SET(cr, 0x02);	/* Voltage exceeds limit */
	SET(cr, 0x04);	/* Temperature exceeds limit */
	itesio_ecwritereg(sc, ITESIO_EC_BEEPEER, cr);
#endif

	/*
	 * Initialize and attach sensors.
	 */
	(*sc->sc_config.setup_sensors)(sc);
	sc->sc_sme = sysmon_envsys_create();
	for (i = 0; i < sc->sc_config.num_sensors; i++) {
		if (sysmon_envsys_sensor_attach(sc->sc_sme,
						&sc->sc_sensor[i])) {
			sysmon_envsys_destroy(sc->sc_sme);
			sc->sc_sme = NULL;
			goto out;
		}
	}
	/*
	 * Hook into the system monitor.
	 */
	sc->sc_sme->sme_name = device_xname(self);
	sc->sc_sme->sme_cookie = sc;
	sc->sc_sme->sme_refresh = itesio_refresh;

	if ((error = sysmon_envsys_register(sc->sc_sme))) {
		aprint_error_dev(self,
		    "unable to register with sysmon (%d)\n", error);
		sysmon_envsys_destroy(sc->sc_sme);
		sc->sc_sme = NULL;
		goto out;
	}
	sc->sc_hwmon_enabled = true;

	if (!pmf_device_register(self, NULL, NULL))
		aprint_error_dev(self, "couldn't establish power handler\n");

	/* Some chips don't support the WDT */
	if (sc->sc_config.no_wdt)
		goto out2;

	/*
	 * Initialize the watchdog timer.
	 */
	sc->sc_smw.smw_name = device_xname(self);
	sc->sc_smw.smw_cookie = sc;
	sc->sc_smw.smw_setmode = itesio_wdt_setmode;
	sc->sc_smw.smw_tickle = itesio_wdt_tickle;
	sc->sc_smw.smw_period = 60;

	if (sysmon_wdog_register(&sc->sc_smw)) {
		aprint_error_dev(self, "unable to register watchdog timer\n");
		goto out2;
	}
	sc->sc_wdt_enabled = true;
	aprint_normal_dev(self, "Watchdog Timer present\n");

	pmf_device_deregister(self);
	if (!pmf_device_register(self, itesio_wdt_suspend, NULL))
		aprint_error_dev(self, "couldn't establish power handler\n");

	return;

out:
	bus_space_unmap(sc->sc_iot, sc->sc_ec_ioh, 8);
out2:
	bus_space_unmap(sc->sc_iot, sc->sc_pnp_ioh, 2);
}

static int
itesio_isa_detach(device_t self, int flags)
{
	struct itesio_softc *sc = device_private(self);

	if (sc->sc_hwmon_enabled)
		sysmon_envsys_unregister(sc->sc_sme);
	if (sc->sc_hwmon_mapped)
		bus_space_unmap(sc->sc_iot, sc->sc_ec_ioh, 8);
	if (sc->sc_wdt_enabled) {
		sysmon_wdog_unregister(&sc->sc_smw);
		bus_space_unmap(sc->sc_iot, sc->sc_pnp_ioh, 2);
	}

	if (sc->sc_sensor != NULL) {
		kmem_free(sc->sc_sensor,
		    sizeof(sc->sc_sensor[0]) * sc->sc_config.num_sensors);
	}

	return 0;
}

static bool
itesio_wdt_suspend(device_t dev, const pmf_qual_t *qual)
{
	struct itesio_softc *sc = device_private(dev);

	/* Don't allow suspend if watchdog is armed */
	if ((sc->sc_smw.smw_mode & WDOG_MODE_MASK) != WDOG_MODE_DISARMED)
		return false;
	return true;
}

/*
 * Functions to read/write to the Environmental Controller.
 */
static uint8_t
itesio_ecreadreg(struct itesio_softc *sc, int reg)
{
	bus_space_write_1(sc->sc_iot, sc->sc_ec_ioh, ITESIO_EC_ADDR, reg);
	return bus_space_read_1(sc->sc_iot, sc->sc_ec_ioh, ITESIO_EC_DATA);
}

static void
itesio_ecwritereg(struct itesio_softc *sc, int reg, int val)
{
	bus_space_write_1(sc->sc_iot, sc->sc_ec_ioh, ITESIO_EC_ADDR, reg);
	bus_space_write_1(sc->sc_iot, sc->sc_ec_ioh, ITESIO_EC_DATA, val);
}

/*
 * Functions to enter/exit/read/write to the Super I/O.
 */
static uint8_t
itesio_readreg(bus_space_tag_t iot, bus_space_handle_t ioh, int reg)
{
	bus_space_write_1(iot, ioh, ITESIO_ADDR, reg);
	return bus_space_read_1(iot, ioh, ITESIO_DATA);
}

static void
itesio_writereg(bus_space_tag_t iot, bus_space_handle_t ioh, int reg, int val)
{
	bus_space_write_1(iot, ioh, ITESIO_ADDR, reg);
	bus_space_write_1(iot, ioh, ITESIO_DATA, val);
}

static void
itesio_enter(bus_space_tag_t iot, bus_space_handle_t ioh)
{
	bus_space_write_1(iot, ioh, ITESIO_ADDR, 0x87);
	bus_space_write_1(iot, ioh, ITESIO_ADDR, 0x01);
	bus_space_write_1(iot, ioh, ITESIO_ADDR, 0x55);
	bus_space_write_1(iot, ioh, ITESIO_ADDR, 0x55);
}

static void
itesio_exit(bus_space_tag_t iot, bus_space_handle_t ioh)
{
	bus_space_write_1(iot, ioh, ITESIO_ADDR, 0x02);
	bus_space_write_1(iot, ioh, ITESIO_DATA, 0x02);
}


#define COPYDESCR(x, y)				\
	do {					\
		strlcpy((x), (y), sizeof(x));	\
	} while (0)
/*
 * sysmon_envsys(9) glue.
 */
static void
itesio_setup_sensors_common(struct itesio_softc *sc)
{
	const struct itesio_config *ic = &sc->sc_config;
	size_t allocsz;
	uint32_t i;

	allocsz = sizeof(sc->sc_sensor[0]) * ic->num_sensors;
	sc->sc_sensor = kmem_zalloc(allocsz, KM_SLEEP);

	/* temperatures */
	for (i = 0; i < ic->voltstart_idx; i++)
		sc->sc_sensor[i].units = ENVSYS_STEMP;

	/* voltages */
	for (i = ic->voltstart_idx; i < ic->fanstart_idx; i++) {
		sc->sc_sensor[i].units = ENVSYS_SVOLTS_DC;
		sc->sc_sensor[i].flags = ENVSYS_FCHANGERFACT;
	}

	/* fans */
	for (i = ic->fanstart_idx; i < ic->num_sensors; i++)
		sc->sc_sensor[i].units = ENVSYS_SFANRPM;

	/* all */
	for (i = 0; i < ic->num_sensors; i++)
		sc->sc_sensor[i].state = ENVSYS_SINVALID;
}

static void
itesio_setup_sensors(struct itesio_softc *sc)
{

	itesio_setup_sensors_common(sc);

	/* temperatures */
	COPYDESCR(sc->sc_sensor[0].desc, "CPU Temp");
	COPYDESCR(sc->sc_sensor[1].desc, "System Temp");
	COPYDESCR(sc->sc_sensor[2].desc, "Aux Temp");

	/* voltages */
	COPYDESCR(sc->sc_sensor[3].desc, "VCORE_A");
	COPYDESCR(sc->sc_sensor[4].desc, "VCORE_B");
	COPYDESCR(sc->sc_sensor[5].desc, "+3.3V");
	COPYDESCR(sc->sc_sensor[6].desc, "+5V");
	COPYDESCR(sc->sc_sensor[7].desc, "+12V");
	COPYDESCR(sc->sc_sensor[8].desc, "-5V");
	COPYDESCR(sc->sc_sensor[9].desc, "-12V");
	COPYDESCR(sc->sc_sensor[10].desc, "STANDBY");
	COPYDESCR(sc->sc_sensor[11].desc, "VBAT");

	/* fans */
	COPYDESCR(sc->sc_sensor[12].desc, "CPU Fan");
	COPYDESCR(sc->sc_sensor[13].desc, "System Fan");
	COPYDESCR(sc->sc_sensor[14].desc, "Aux Fan");
}

static void
itesio_setup_it8625_sensors(struct itesio_softc *sc)
{

	itesio_setup_sensors_common(sc);

	/* temperatures */
	COPYDESCR(sc->sc_sensor[0].desc, "Temp0");
	COPYDESCR(sc->sc_sensor[1].desc, "Temp1");
	COPYDESCR(sc->sc_sensor[2].desc, "Temp2");

	/* voltages */
	COPYDESCR(sc->sc_sensor[3].desc, "VIN0");
	COPYDESCR(sc->sc_sensor[4].desc, "VIN1");
	COPYDESCR(sc->sc_sensor[5].desc, "VIN2");
	COPYDESCR(sc->sc_sensor[6].desc, "VIN3");
	COPYDESCR(sc->sc_sensor[7].desc, "VIN4");
	COPYDESCR(sc->sc_sensor[8].desc, "VIN5");
	COPYDESCR(sc->sc_sensor[9].desc, "VIN6");
	COPYDESCR(sc->sc_sensor[10].desc, "Internal 3VSB");
	COPYDESCR(sc->sc_sensor[11].desc, "VBAT");
	COPYDESCR(sc->sc_sensor[12].desc, "Internal AVCC3");

	/* fans */
	COPYDESCR(sc->sc_sensor[13].desc, "Fan0");
	COPYDESCR(sc->sc_sensor[14].desc, "Fan1");
	COPYDESCR(sc->sc_sensor[15].desc, "Fan2");
	COPYDESCR(sc->sc_sensor[16].desc, "Fan3");
	COPYDESCR(sc->sc_sensor[17].desc, "Fan4");
	COPYDESCR(sc->sc_sensor[18].desc, "Fan5");
}
#undef COPYDESCR

static void
itesio_refresh_temp(struct itesio_softc *sc, envsys_data_t *edata)
{
	int sdata;

	sdata = itesio_ecreadreg(sc, ITESIO_EC_SENSORTEMPBASE + edata->sensor);
	/* sensor is not connected or reporting invalid data */
	if (sdata == 0 || sdata >= 0xfa) {
		edata->state = ENVSYS_SINVALID;
		return;
	}

	DPRINTF(("%s: sdata[temp%d] 0x%x\n", __func__, edata->sensor, sdata));
	/* Convert temperature to uK */
	edata->value_cur = sdata * 1000000 + 273150000;
	edata->state = ENVSYS_SVALID;
}

static void
itesio_refresh_volts(struct itesio_softc *sc, envsys_data_t *edata)
{
	uint8_t vbatcr = 0;
	int i, sdata;

	i = edata->sensor - sc->sc_config.voltstart_idx;

	sdata = itesio_ecreadreg(sc, ITESIO_EC_SENSORVOLTBASE + i);
	/* not connected */
	if (sdata == 0 || sdata == 0xff) {
		edata->state = ENVSYS_SINVALID;
		return;
	}

	/*
	 * update VBAT voltage reading every time we read it, to get
	 * latest value.
	 */
	if (i == 8) {
		vbatcr = itesio_ecreadreg(sc, ITESIO_EC_CONFIG);
		SET(vbatcr, ITESIO_EC_UPDATEVBAT);
		itesio_ecwritereg(sc, ITESIO_EC_CONFIG, vbatcr);
	}

	DPRINTF(("%s: sdata[volt%d] 0x%x\n", __func__, i, sdata));

	/* voltage returned as (mV << 4) */
	edata->value_cur = (sdata << 4);
	/* negative values */
	if (i == 5 || i == 6)
		edata->value_cur -= ITESIO_EC_VREF;
	/* rfact is (factor * 10^4) */
	if (edata->rfact)
		edata->value_cur *= edata->rfact;
	else
		edata->value_cur *= itesio_vrfact[i];
	/* division by 10 gets us back to uVDC */
	edata->value_cur /= 10;
	if (i == 5 || i == 6)
		edata->value_cur += ITESIO_EC_VREF * 1000;

	edata->state = ENVSYS_SVALID;
}

static void
itesio_refresh_it8625_volts(struct itesio_softc *sc, envsys_data_t *edata)
{
	int i, sdata;

	i = edata->sensor - sc->sc_config.voltstart_idx;

	if (i < 9)
		sdata = itesio_ecreadreg(sc, ITESIO_EC_SENSORVOLTBASE + i);
	else
		sdata = itesio_ecreadreg(sc,
		    ITESIO_EC_SENSORVOLTEXTBASE + i - 9);
	/* not connected */
	if (sdata == 0 || sdata == 0xff) {
		edata->state = ENVSYS_SINVALID;
		return;
	}

	DPRINTF(("%s: sdata[volt%d] 0x%x\n", __func__, i, sdata));

	if (i == 7) {
		/* Internal 3VSB: reading value * 2 * 10.9mV */
		edata->value_cur = sdata * 2 * 109;
	} else {
		/* other: reading value * 10.9mV */
		edata->value_cur = sdata * 109;
	}
	/* rfact is (factor * 10^4) */
	if (edata->rfact)
		edata->value_cur *= edata->rfact;
	else
		edata->value_cur *= RFACT_NONE;
	/* division by 100 gets us back to uVDC */
	edata->value_cur /= 100;
	edata->state = ENVSYS_SVALID;
}

static void
itesio_refresh_fans(struct itesio_softc *sc, envsys_data_t *edata)
{
	uint8_t mode;
	uint16_t sdata;
	int i;

	i = edata->sensor - sc->sc_config.fanstart_idx;

	mode = itesio_ecreadreg(sc, ITESIO_EC_FAN16_CER);
	sdata = itesio_ecreadreg(sc, ITESIO_EC_SENSORFANBASE + i);
	if (mode & (1 << i))
		sdata += (itesio_ecreadreg(sc,
		    ITESIO_EC_SENSORFANEXTBASE + i) << 8);
	edata->state = ENVSYS_SVALID;
	if (sdata == 0 ||
	    sdata == ((mode & (1 << i)) ? 0xffff : 0xff))
		edata->state = ENVSYS_SINVALID;
	else {
		edata->value_cur = 1350000 / 2 / sdata;
		edata->state = ENVSYS_SVALID;
	}
	DPRINTF(("%s: 16bit sdata[fan%d] 0x%x\n", __func__, i, sdata));
}

static void
itesio_refresh_it8705_fans(struct itesio_softc *sc, envsys_data_t *edata)
{
	uint16_t sdata;
	int i, divisor, odivisor, ndivisor;

	i = edata->sensor - sc->sc_config.fanstart_idx;

	/*
	 * Use the Fan Tachometer Divisor Register for
	 * IT8705F and IT8712F.
	 */
	divisor = odivisor = ndivisor =
	    itesio_ecreadreg(sc, ITESIO_EC_FAN_TDR);
	sdata = itesio_ecreadreg(sc, ITESIO_EC_SENSORFANBASE + i);
	if (sdata == 0xff) {
		edata->state = ENVSYS_SINVALID;
		if (i == 2)
			ndivisor |= 0x40;
		else {
			ndivisor &= ~(7 << (i * 3));
			ndivisor |= ((divisor + 1) & 7) << (i * 3);
		}
	} else {
		if (i == 2)
			divisor = divisor & 1 ? 3 : 1;

		if ((sdata << (divisor & 7)) == 0)
			edata->state = ENVSYS_SINVALID;
		else {
			edata->value_cur =
			    1350000 / (sdata << (divisor & 7));
			edata->state = ENVSYS_SVALID;
		}
	}
	DPRINTF(("%s: 8bit sdata[fan%d] 0x%x div: 0x%x\n", __func__,
	    i, sdata, divisor));
	if (ndivisor != odivisor)
		itesio_ecwritereg(sc, ITESIO_EC_FAN_TDR, ndivisor);
}

static void
itesio_refresh_it8625_fans(struct itesio_softc *sc, envsys_data_t *edata)
{
	uint16_t sdata;
	int i;

	i = edata->sensor - sc->sc_config.fanstart_idx;

	switch (i) {
	case 0:
	case 1:
	case 2:
		sdata = itesio_ecreadreg(sc, ITESIO_EC_SENSORFANBASE + i);
		sdata += (itesio_ecreadreg(sc,
		    ITESIO_EC_SENSORFANEXTBASE + i) << 8);
		break;
	case 3:
		sdata = itesio_ecreadreg(sc, IT8625_EC_SENSORFAN4_LSB);
		sdata += itesio_ecreadreg(sc, IT8625_EC_SENSORFAN4_MSB) << 8;
		break;
	case 4:
		sdata = itesio_ecreadreg(sc, IT8625_EC_SENSORFAN5_LSB);
		sdata += itesio_ecreadreg(sc, IT8625_EC_SENSORFAN5_MSB) << 8;
		break;
	case 5:
		sdata = itesio_ecreadreg(sc, IT8625_EC_SENSORFAN6_LSB);
		sdata += itesio_ecreadreg(sc, IT8625_EC_SENSORFAN6_MSB) << 8;
		break;
	default:
		edata->state = ENVSYS_SINVALID;
		return;
	}
	edata->state = ENVSYS_SVALID;
	if (sdata == 0 || sdata == 0xffff)
		edata->state = ENVSYS_SINVALID;
	else {
		edata->value_cur = 1350000 / 2 / sdata;
		edata->state = ENVSYS_SVALID;
	}
	DPRINTF(("%s: 16bit sdata[fan%d] 0x%x\n", __func__, i, sdata));
}

static void
itesio_refresh(struct sysmon_envsys *sme, struct envsys_data *edata)
{
	struct itesio_softc *sc = sme->sme_cookie;

	if (edata->sensor < sc->sc_config.voltstart_idx)
		(*sc->sc_config.refresh_temp)(sc, edata);
	else if (edata->sensor >= sc->sc_config.voltstart_idx &&
	    edata->sensor < sc->sc_config.fanstart_idx)
		(*sc->sc_config.refresh_volts)(sc, edata);
	else
		(*sc->sc_config.refresh_fans)(sc, edata);
}

static int
itesio_wdt_setmode(struct sysmon_wdog *smw)
{
	struct itesio_softc *sc = smw->smw_cookie;
	int period = smw->smw_period;

	/* Enter MB PNP mode and select the WDT LDN */
	itesio_enter(sc->sc_iot, sc->sc_pnp_ioh);
	itesio_writereg(sc->sc_iot, sc->sc_pnp_ioh, ITESIO_LDNSEL,
	    ITESIO_WDT_LDN);

	if ((smw->smw_mode & WDOG_MODE_MASK) == WDOG_MODE_DISARMED) {
		/* Disable the watchdog */
		itesio_writereg(sc->sc_iot, sc->sc_pnp_ioh, ITESIO_WDT_CTL, 0);
		itesio_writereg(sc->sc_iot, sc->sc_pnp_ioh, ITESIO_WDT_CNF, 0);
		itesio_writereg(sc->sc_iot, sc->sc_pnp_ioh, ITESIO_WDT_TMO_MSB, 0);
		itesio_writereg(sc->sc_iot, sc->sc_pnp_ioh, ITESIO_WDT_TMO_LSB, 0);
	} else {
		/* Enable the watchdog */
		if (period > ITESIO_WDT_MAXTIMO || period < 1)
			period = smw->smw_period = ITESIO_WDT_MAXTIMO;

		period *= 2;

		/* set the timeout and start the watchdog */
		itesio_writereg(sc->sc_iot, sc->sc_pnp_ioh, ITESIO_WDT_TMO_MSB,
		    period >> 8);
		itesio_writereg(sc->sc_iot, sc->sc_pnp_ioh, ITESIO_WDT_TMO_LSB,
		    period & 0xff);
		itesio_writereg(sc->sc_iot, sc->sc_pnp_ioh, ITESIO_WDT_CNF,
		    ITESIO_WDT_CNF_SECS | ITESIO_WDT_CNF_KRST |
		    ITESIO_WDT_CNF_PWROK);
	}
	/* we are done, exit MB PNP mode */
	itesio_exit(sc->sc_iot, sc->sc_pnp_ioh);

	return 0;
}

static int
itesio_wdt_tickle(struct sysmon_wdog *smw)
{
	struct itesio_softc *sc = smw->smw_cookie;
	int period = smw->smw_period * 2;

	/* refresh timeout value and exit */
	itesio_enter(sc->sc_iot, sc->sc_pnp_ioh);
	itesio_writereg(sc->sc_iot, sc->sc_pnp_ioh, ITESIO_LDNSEL,
	    ITESIO_WDT_LDN);
	itesio_writereg(sc->sc_iot, sc->sc_pnp_ioh, ITESIO_WDT_TMO_MSB,
	    period >> 8);
	itesio_writereg(sc->sc_iot, sc->sc_pnp_ioh, ITESIO_WDT_TMO_LSB,
	    period & 0xff);
	itesio_exit(sc->sc_iot, sc->sc_pnp_ioh);

	return 0;
}

MODULE(MODULE_CLASS_DRIVER, itesio, "sysmon_envsys,sysmon_wdog");

#ifdef _MODULE
#include "ioconf.c"
#endif

static int
itesio_modcmd(modcmd_t cmd, void *opaque)
{
	switch (cmd) {
	case MODULE_CMD_INIT:
#ifdef _MODULE
		return config_init_component(cfdriver_ioconf_itesio,
		    cfattach_ioconf_itesio, cfdata_ioconf_itesio);
#else
		return 0;
#endif
	case MODULE_CMD_FINI:
#ifdef _MODULE
		return config_fini_component(cfdriver_ioconf_itesio,
		    cfattach_ioconf_itesio, cfdata_ioconf_itesio);
#else
		return 0;
#endif
	default:
		return ENOTTY;
	}
}