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/* $OpenBSD: pchtemp.c,v 1.4 2016/05/24 07:59:24 reyk Exp $ */
/*
* Copyright (c) 2015 Mark Kettenis
*
* 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.
*/
/*
* Intel X99, C610, 9 Series and 100 Series PCH thermal sensor
* controller driver
*/
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/device.h>
#include <sys/sensors.h>
#include <dev/pci/pcireg.h>
#include <dev/pci/pcivar.h>
#include <dev/pci/pcidevs.h>
#define PCHTEMP_PCI_TBAR 0x10
#define PCHTEMP_TEMP 0x00
#define PCHTEMP_TSEL 0x08
#define PCHTEMP_TSEL_ETS 0x01
struct pchtemp_softc {
struct device sc_dev;
bus_space_tag_t sc_memt;
bus_space_handle_t sc_memh;
bus_size_t sc_mems;
struct ksensor sc_sensor;
struct ksensordev sc_sensordev;
};
int pchtemp_match(struct device *, void *, void *);
void pchtemp_attach(struct device *, struct device *, void *);
void pchtemp_refresh(void *);
struct cfdriver pchtemp_cd = {
NULL, "pchtemp", DV_DULL
};
struct cfattach pchtemp_ca = {
sizeof(struct pchtemp_softc), pchtemp_match, pchtemp_attach
};
const struct pci_matchid pchtemp_devices[] = {
{ PCI_VENDOR_INTEL, PCI_PRODUCT_INTEL_C610_THERM },
{ PCI_VENDOR_INTEL, PCI_PRODUCT_INTEL_9SERIES_LP_THERM },
{ PCI_VENDOR_INTEL, PCI_PRODUCT_INTEL_100SERIES_THERM },
{ PCI_VENDOR_INTEL, PCI_PRODUCT_INTEL_100SERIES_LP_THERM },
};
int
pchtemp_match(struct device *parent, void *match, void *aux)
{
return (pci_matchbyid(aux, pchtemp_devices, nitems(pchtemp_devices)));
}
void
pchtemp_attach(struct device *parent, struct device *self, void *aux)
{
struct pchtemp_softc *sc = (struct pchtemp_softc *)self;
struct pci_attach_args *pa = aux;
pcireg_t memtype;
uint8_t tsel;
memtype = PCI_MAPREG_TYPE_MEM | PCI_MAPREG_MEM_TYPE_64BIT;
if (pci_mapreg_map(pa, PCHTEMP_PCI_TBAR, memtype, 0,
&sc->sc_memt, &sc->sc_memh, NULL, &sc->sc_mems, 0)) {
printf(": can't map registers\n");
return;
}
tsel = bus_space_read_1(sc->sc_memt, sc->sc_memh, PCHTEMP_TSEL);
if ((tsel & PCHTEMP_TSEL_ETS) == 0) {
printf(": disabled\n");
goto unmap;
}
pchtemp_refresh(sc);
strlcpy(sc->sc_sensordev.xname, sc->sc_dev.dv_xname,
sizeof(sc->sc_sensordev.xname));
sc->sc_sensor.type = SENSOR_TEMP;
sensor_attach(&sc->sc_sensordev, &sc->sc_sensor);
if (sensor_task_register(sc, pchtemp_refresh, 5) == NULL) {
printf(": can't register update task\n");
goto unmap;
}
sensordev_install(&sc->sc_sensordev);
printf("\n");
return;
unmap:
bus_space_unmap(sc->sc_memt, sc->sc_memh, sc->sc_mems);
}
void
pchtemp_refresh(void *arg)
{
struct pchtemp_softc *sc = arg;
uint16_t temp;
temp = bus_space_read_2(sc->sc_memt, sc->sc_memh, PCHTEMP_TEMP);
sc->sc_sensor.value = (temp * 500000 - 50000000) + 273150000;
}
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