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Differential D39970 Diff 122845 sys/dev/it8613hwm/it8613hwm.c

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sys/dev/it8613hwm/it8613hwm.c

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/*-
* SPDX-License-Identifier: BSD-2-Clause
*
* Copyright (c) 2022 Johannes Totz
*
* 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 AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED 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.
*/
#include <sys/param.h>
#include <sys/bus.h>
#include <sys/kernel.h>
#include <sys/module.h>
#include <sys/mutex.h>
#include <sys/rman.h>
#include <sys/sysctl.h>
#include <dev/superio/superio.h>
#include <machine/bus.h>
#include <machine/resource.h>
struct it8613hwm_softc {
struct resource *ioport_res;
int ioport_rid;
struct mtx lock;
};
static int
it8613hwm_get_temp_sysctl(SYSCTL_HANDLER_ARGS)
{
device_t dev = (device_t) arg1;
struct it8613hwm_softc *sc = device_get_softc(dev);
int tempindex = arg2;
int tempkelvin = 0;
uint8_t tempcelsius;
int8_t tempoffset;
if (tempindex >= 0 && tempindex < 3) {
mtx_lock(&sc->lock);
bus_write_1(sc->ioport_res, 0, 0x29 + tempindex);
tempcelsius = bus_read_1(sc->ioport_res, 1);
/*
* The offset registers are: 0x56, 0x57, 0x59.
* (Register 0x58 is the vendor id for the chip.)
*/
bus_write_1(sc->ioport_res, 0, 0x56 +
(tempindex < 2 ? tempindex : 3));
tempoffset = bus_read_1(sc->ioport_res, 1);
tempkelvin = tempcelsius - tempoffset + 273;
mtx_unlock(&sc->lock);
}
return (sysctl_handle_int(oidp, &tempkelvin, 0, req));
}
static int
it8613hwm_get_fan_sysctl(SYSCTL_HANDLER_ARGS)
{
device_t dev = (device_t) arg1;
struct it8613hwm_softc *sc = device_get_softc(dev);
int fanindex = arg2;
unsigned int fanspeedrpm = 0;
if (fanindex >= 0 && fanindex < 3) {
mtx_lock(&sc->lock);
/* High bits of fan tachometer. */
bus_write_1(sc->ioport_res, 0, 0x18 + fanindex);
fanspeedrpm = bus_read_1(sc->ioport_res, 1) << 8;
/* Low bits of fan tachometer. */
bus_write_1(sc->ioport_res, 0, 0x0D + fanindex);
fanspeedrpm |= bus_read_1(sc->ioport_res, 1);
/*
* The fan tacho has a 22.5 kHz clock and produces 2 pulses per
* revolution.
*/
if (fanspeedrpm > 0)
fanspeedrpm = (22500 * 60) / (fanspeedrpm * 2);
mtx_unlock(&sc->lock);
}
return (sysctl_handle_int(oidp, &fanspeedrpm, 0, req));
}
static int
it8613hwm_probe(device_t dev)
{
if (superio_vendor(dev) != SUPERIO_VENDOR_ITE)
return (ENXIO);
if (superio_get_type(dev) != SUPERIO_DEV_HWM)
return (ENXIO);
if (superio_devid(dev) != 0x8613)
return (ENXIO);
device_set_desc(dev, "Hardware monitor on ITE SuperIO");
return (BUS_PROBE_DEFAULT);
}
static int
it8613hwm_attach(device_t dev)
{
struct it8613hwm_softc *sc = device_get_softc(dev);
struct sysctl_ctx_list *ctx;
int error;
uint16_t iobase;
uint8_t chipid;
/*
* The hardware monitor sits at offset 5 in the chip's io address space.
* We'll claim two ports: first (iobase + 5 + 0) is the chip's register
* selector; the second (iobase + 5 + 1) is the data register.
*/
iobase = superio_get_iobase(dev);
error = bus_set_resource(dev, SYS_RES_IOPORT, sc->ioport_rid,
iobase + 5, 2);
if (error != 0) {
device_printf(dev, "bus_set_resource failed\n");
return (ENXIO);
}
sc->ioport_res = bus_alloc_resource_any(dev, SYS_RES_IOPORT,
&sc->ioport_rid, RF_ACTIVE);
if (sc->ioport_res == NULL) {
device_printf(dev, "bus_alloc_resource_any failed\n");
return (ENXIO);
}
/*
* Check hardware monitor vendor id.
* This should be 0x90 for the it8613.
*/
bus_write_1(sc->ioport_res, 0, 0x58);
chipid = bus_read_1(sc->ioport_res, 1);
if (chipid != 0x90) {
device_printf(dev, "unexpected chip id: "
"actual %i != expected %i\n", chipid, 0x90);
bus_release_resource(dev, SYS_RES_IOPORT, sc->ioport_rid,
sc->ioport_res);
return (ENXIO);
}
mtx_init(&sc->lock, device_get_nameunit(dev), "it8613hwm", MTX_DEF);
ctx = device_get_sysctl_ctx(dev);
/* Gets us "dev.it8613hwm.0.temperature0" etc */
SYSCTL_ADD_PROC(ctx, SYSCTL_CHILDREN(device_get_sysctl_tree(dev)),
OID_AUTO, "temperature0", CTLTYPE_INT | CTLFLAG_RD | CTLFLAG_MPSAFE,
dev, 0, it8613hwm_get_temp_sysctl, "IK0", "Temperature sensor 0");
SYSCTL_ADD_PROC(ctx, SYSCTL_CHILDREN(device_get_sysctl_tree(dev)),
OID_AUTO, "temperature1", CTLTYPE_INT | CTLFLAG_RD | CTLFLAG_MPSAFE,
dev, 1, it8613hwm_get_temp_sysctl, "IK0", "Temperature sensor 1");
SYSCTL_ADD_PROC(ctx, SYSCTL_CHILDREN(device_get_sysctl_tree(dev)),
OID_AUTO, "temperature2", CTLTYPE_INT | CTLFLAG_RD | CTLFLAG_MPSAFE,
dev, 2, it8613hwm_get_temp_sysctl, "IK0", "Temperature sensor 2");
/* Gets us "dev.it8613hwm.0.fan0" etc */
SYSCTL_ADD_PROC(ctx, SYSCTL_CHILDREN(device_get_sysctl_tree(dev)),
OID_AUTO, "fan0", CTLTYPE_INT | CTLFLAG_RD | CTLFLAG_MPSAFE,
dev, 0, it8613hwm_get_fan_sysctl, "I", "RPM of fan 0");
SYSCTL_ADD_PROC(ctx, SYSCTL_CHILDREN(device_get_sysctl_tree(dev)),
OID_AUTO, "fan1", CTLTYPE_INT | CTLFLAG_RD | CTLFLAG_MPSAFE,
dev, 1, it8613hwm_get_fan_sysctl, "I", "RPM of fan 1");
SYSCTL_ADD_PROC(ctx, SYSCTL_CHILDREN(device_get_sysctl_tree(dev)),
OID_AUTO, "fan2", CTLTYPE_INT | CTLFLAG_RD | CTLFLAG_MPSAFE,
dev, 2, it8613hwm_get_fan_sysctl, "I", "RPM of fan 2");
return (0);
}
static int
it8613hwm_detach(device_t dev)
{
struct it8613hwm_softc *sc = device_get_softc(dev);
bus_release_resource(dev, SYS_RES_IOPORT, sc->ioport_rid,
sc->ioport_res);
mtx_destroy(&sc->lock);
return (0);
}
static device_method_t it8613hwm_methods[] = {
/* Methods from the device interface */
DEVMETHOD(device_probe, it8613hwm_probe),
DEVMETHOD(device_attach, it8613hwm_attach),
DEVMETHOD(device_detach, it8613hwm_detach),
/* Terminate method list */
{ 0, 0 }
};
static driver_t it8613hwm_driver = {
"it8613hwm",
it8613hwm_methods,
sizeof(struct it8613hwm_softc)
};
DRIVER_MODULE(it8613hwm, superio, it8613hwm_driver, NULL, NULL);
MODULE_DEPEND(it8613hwm, superio, 1, 1, 1);
MODULE_VERSION(it8613hwm, 1);