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/* $OpenBSD: km.c,v 1.3 2008/08/30 01:10:13 brad Exp $ */
/*
* Copyright (c) 2008 Constantine A. Murenin <cnst+openbsd@bugmail.mojo.ru>
*
* 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 <machine/bus.h>
#include <dev/pci/pcireg.h>
#include <dev/pci/pcivar.h>
#include <dev/pci/pcidevs.h>
/*
* AMD Family 10h/11h Processors, Function 3 -- Miscellaneous Control
*/
/* Function 3 Registers */
#define KM_REP_TEMP_CONTR_R 0xa4
#define KM_THERMTRIP_STAT_R 0xe4
#define KM_NORTHBRIDGE_CAP_R 0xe8
#define KM_CPUID_FAMILY_MODEL_R 0xfc
/* Operations on Reported Temperature Control Register */
#define KM_GET_CURTMP(r) (((r) >> 21) & 0x7ff)
/* Operations on Thermtrip Status Register */
#define KM_GET_DIODEOFFSET(r) (((r) >> 8) & 0x7f)
struct km_softc {
struct device sc_dev;
pci_chipset_tag_t sc_pc;
pcitag_t sc_pcitag;
struct ksensor sc_sensor;
struct ksensordev sc_sensordev;
};
int km_match(struct device *, void *, void *);
void km_attach(struct device *, struct device *, void *);
void km_refresh(void *);
struct cfattach km_ca = {
sizeof(struct km_softc), km_match, km_attach
};
struct cfdriver km_cd = {
NULL, "km", DV_DULL
};
static const struct pci_matchid km_devices[] = {
{ PCI_VENDOR_AMD, PCI_PRODUCT_AMD_AMD64_10_MISC },
{ PCI_VENDOR_AMD, PCI_PRODUCT_AMD_AMD64_11_MISC }
};
int
km_match(struct device *parent, void *match, void *aux)
{
/* successful match supersedes pchb(4) */
return pci_matchbyid((struct pci_attach_args *)aux, km_devices,
sizeof(km_devices) / sizeof(km_devices[0])) * 2;
}
void
km_attach(struct device *parent, struct device *self, void *aux)
{
struct km_softc *sc = (struct km_softc *)self;
struct pci_attach_args *pa = aux;
sc->sc_pc = pa->pa_pc;
sc->sc_pcitag = pa->pa_tag;
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, km_refresh, 5) == NULL) {
printf(": unable to register the update task\n");
return;
}
sensordev_install(&sc->sc_sensordev);
printf("\n");
}
void
km_refresh(void *arg)
{
struct km_softc *sc = arg;
struct ksensor *s = &sc->sc_sensor;
pcireg_t r;
int c;
r = pci_conf_read(sc->sc_pc, sc->sc_pcitag, KM_REP_TEMP_CONTR_R);
c = KM_GET_CURTMP(r);
s->value = c * 125000 + 273150000;
}
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