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130 lines
4.0 KiB
C
130 lines
4.0 KiB
C
/* $NetBSD: mvsocts.c,v 1.1 2012/08/01 10:34:42 kiyohara Exp $ */
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/*
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* Copyright (c) 2012 KIYOHARA Takashi
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT,
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* INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
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* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
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* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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__KERNEL_RCSID(0, "$NetBSD: mvsocts.c,v 1.1 2012/08/01 10:34:42 kiyohara Exp $");
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#include <sys/param.h>
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#include <sys/bus.h>
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#include <sys/device.h>
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#include <sys/errno.h>
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#include <dev/sysmon/sysmonvar.h>
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#include <dev/marvell/marvellvar.h>
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#define TS_STATUS 0x0
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#define STATUS_VALID (1 << 9)
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#define STATUS_VAL(v) (((v) >> 10) & 0x1ff)
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#define VAL2MCELSIUS(v) (((322 - (v)) * 10000) / 13625)
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struct mvsocts_softc {
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device_t sc_dev;
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struct sysmon_envsys *sc_sme;
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envsys_data_t sc_sensor;
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bus_space_tag_t sc_iot;
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bus_space_handle_t sc_ioh;
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};
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static int mvsocts_match(device_t, struct cfdata *, void *);
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static void mvsocts_attach(device_t, device_t, void *);
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static void mvsocts_refresh(struct sysmon_envsys *, envsys_data_t *);
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CFATTACH_DECL_NEW(mvsocts, sizeof(struct mvsocts_softc),
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mvsocts_match, mvsocts_attach, NULL, NULL);
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/* ARGSUSED */
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static int
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mvsocts_match(device_t parent, struct cfdata *match, void *aux)
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{
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struct marvell_attach_args *mva = aux;
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if (strcmp(mva->mva_name, match->cf_name) != 0)
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return 0;
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return 1;
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}
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/* ARGSUSED */
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static void
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mvsocts_attach(device_t parent, device_t self, void *aux)
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{
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struct mvsocts_softc *sc = device_private(self);
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struct marvell_attach_args *mva = aux;
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aprint_naive("\n");
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aprint_normal(": Marvell SoC Thermal Sensor\n");
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sc->sc_dev = self;
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sc->sc_iot = mva->mva_iot;
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if (bus_space_subregion(mva->mva_iot, mva->mva_ioh,
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mva->mva_offset, sizeof(uint32_t), &sc->sc_ioh))
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panic("%s: Cannot map registers", device_xname(self));
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sc->sc_sme = sysmon_envsys_create();
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/* Initialize sensor data. */
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sc->sc_sensor.units = ENVSYS_STEMP;
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sc->sc_sensor.state = ENVSYS_SINVALID;
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strlcpy(sc->sc_sensor.desc, device_xname(self),
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sizeof(sc->sc_sensor.desc));
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if (sysmon_envsys_sensor_attach(sc->sc_sme, &sc->sc_sensor)) {
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aprint_error_dev(self, "Unable to attach sysmon\n");
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sysmon_envsys_destroy(sc->sc_sme);
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return;
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}
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/* Hook into system monitor. */
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sc->sc_sme->sme_name = device_xname(self);
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sc->sc_sme->sme_cookie = sc;
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sc->sc_sme->sme_refresh = mvsocts_refresh;
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if (sysmon_envsys_register(sc->sc_sme)) {
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aprint_error_dev(self, "Unable to register with sysmon\n");
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sysmon_envsys_destroy(sc->sc_sme);
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}
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}
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static void
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mvsocts_refresh(struct sysmon_envsys *sme, envsys_data_t *edata)
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{
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struct mvsocts_softc *sc = sme->sme_cookie;
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uint32_t val, uc, uk;
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val = bus_space_read_4(sc->sc_iot, sc->sc_ioh, TS_STATUS);
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if (!(val & STATUS_VALID)) {
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aprint_error_dev(sc->sc_dev, "status value is invalid\n");
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return;
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}
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uc = VAL2MCELSIUS(STATUS_VAL(val)) * 1000000; /* uC */
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uk = uc + 273150000; /* convert to uKelvin */
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sc->sc_sensor.value_cur = uk;
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sc->sc_sensor.state = ENVSYS_SVALID;
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}
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