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mvsocts.c revision 1.1
      1  1.1  kiyohara /*	$NetBSD: mvsocts.c,v 1.1 2012/08/01 10:34:42 kiyohara Exp $	*/
      2  1.1  kiyohara /*
      3  1.1  kiyohara  * Copyright (c) 2012 KIYOHARA Takashi
      4  1.1  kiyohara  * All rights reserved.
      5  1.1  kiyohara  *
      6  1.1  kiyohara  * Redistribution and use in source and binary forms, with or without
      7  1.1  kiyohara  * modification, are permitted provided that the following conditions
      8  1.1  kiyohara  * are met:
      9  1.1  kiyohara  * 1. Redistributions of source code must retain the above copyright
     10  1.1  kiyohara  *    notice, this list of conditions and the following disclaimer.
     11  1.1  kiyohara  * 2. Redistributions in binary form must reproduce the above copyright
     12  1.1  kiyohara  *    notice, this list of conditions and the following disclaimer in the
     13  1.1  kiyohara  *    documentation and/or other materials provided with the distribution.
     14  1.1  kiyohara  *
     15  1.1  kiyohara  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
     16  1.1  kiyohara  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
     17  1.1  kiyohara  * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
     18  1.1  kiyohara  * DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT,
     19  1.1  kiyohara  * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
     20  1.1  kiyohara  * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
     21  1.1  kiyohara  * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     22  1.1  kiyohara  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
     23  1.1  kiyohara  * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
     24  1.1  kiyohara  * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     25  1.1  kiyohara  * POSSIBILITY OF SUCH DAMAGE.
     26  1.1  kiyohara  */
     27  1.1  kiyohara #include <sys/cdefs.h>
     28  1.1  kiyohara __KERNEL_RCSID(0, "$NetBSD: mvsocts.c,v 1.1 2012/08/01 10:34:42 kiyohara Exp $");
     29  1.1  kiyohara 
     30  1.1  kiyohara #include <sys/param.h>
     31  1.1  kiyohara #include <sys/bus.h>
     32  1.1  kiyohara #include <sys/device.h>
     33  1.1  kiyohara #include <sys/errno.h>
     34  1.1  kiyohara 
     35  1.1  kiyohara #include <dev/sysmon/sysmonvar.h>
     36  1.1  kiyohara 
     37  1.1  kiyohara #include <dev/marvell/marvellvar.h>
     38  1.1  kiyohara 
     39  1.1  kiyohara #define TS_STATUS		0x0
     40  1.1  kiyohara #define   STATUS_VALID			(1 << 9)
     41  1.1  kiyohara #define   STATUS_VAL(v)			(((v) >> 10) & 0x1ff)
     42  1.1  kiyohara 
     43  1.1  kiyohara #define VAL2MCELSIUS(v)		(((322 - (v)) * 10000) / 13625)
     44  1.1  kiyohara 
     45  1.1  kiyohara struct mvsocts_softc {
     46  1.1  kiyohara 	device_t sc_dev;
     47  1.1  kiyohara 
     48  1.1  kiyohara 	struct sysmon_envsys *sc_sme;
     49  1.1  kiyohara 	envsys_data_t sc_sensor;
     50  1.1  kiyohara 
     51  1.1  kiyohara 	bus_space_tag_t sc_iot;
     52  1.1  kiyohara 	bus_space_handle_t sc_ioh;
     53  1.1  kiyohara };
     54  1.1  kiyohara 
     55  1.1  kiyohara 
     56  1.1  kiyohara static int mvsocts_match(device_t, struct cfdata *, void *);
     57  1.1  kiyohara static void mvsocts_attach(device_t, device_t, void *);
     58  1.1  kiyohara 
     59  1.1  kiyohara static void mvsocts_refresh(struct sysmon_envsys *, envsys_data_t *);
     60  1.1  kiyohara 
     61  1.1  kiyohara CFATTACH_DECL_NEW(mvsocts, sizeof(struct mvsocts_softc),
     62  1.1  kiyohara     mvsocts_match, mvsocts_attach, NULL, NULL);
     63  1.1  kiyohara 
     64  1.1  kiyohara 
     65  1.1  kiyohara /* ARGSUSED */
     66  1.1  kiyohara static int
     67  1.1  kiyohara mvsocts_match(device_t parent, struct cfdata *match, void *aux)
     68  1.1  kiyohara {
     69  1.1  kiyohara 	struct marvell_attach_args *mva = aux;
     70  1.1  kiyohara 
     71  1.1  kiyohara 	if (strcmp(mva->mva_name, match->cf_name) != 0)
     72  1.1  kiyohara 		return 0;
     73  1.1  kiyohara 	return 1;
     74  1.1  kiyohara }
     75  1.1  kiyohara 
     76  1.1  kiyohara /* ARGSUSED */
     77  1.1  kiyohara static void
     78  1.1  kiyohara mvsocts_attach(device_t parent, device_t self, void *aux)
     79  1.1  kiyohara {
     80  1.1  kiyohara         struct mvsocts_softc *sc = device_private(self);
     81  1.1  kiyohara 	struct marvell_attach_args *mva = aux;
     82  1.1  kiyohara 
     83  1.1  kiyohara 	aprint_naive("\n");
     84  1.1  kiyohara 	aprint_normal(": Marvell SoC Thermal Sensor\n");
     85  1.1  kiyohara 
     86  1.1  kiyohara 	sc->sc_dev = self;
     87  1.1  kiyohara 	sc->sc_iot = mva->mva_iot;
     88  1.1  kiyohara 	if (bus_space_subregion(mva->mva_iot, mva->mva_ioh,
     89  1.1  kiyohara 	    mva->mva_offset, sizeof(uint32_t), &sc->sc_ioh))
     90  1.1  kiyohara 		panic("%s: Cannot map registers", device_xname(self));
     91  1.1  kiyohara 
     92  1.1  kiyohara 	sc->sc_sme = sysmon_envsys_create();
     93  1.1  kiyohara 	/* Initialize sensor data. */
     94  1.1  kiyohara 	sc->sc_sensor.units =  ENVSYS_STEMP;
     95  1.1  kiyohara 	sc->sc_sensor.state =  ENVSYS_SINVALID;
     96  1.1  kiyohara 	strlcpy(sc->sc_sensor.desc, device_xname(self),
     97  1.1  kiyohara 	    sizeof(sc->sc_sensor.desc));
     98  1.1  kiyohara 	if (sysmon_envsys_sensor_attach(sc->sc_sme, &sc->sc_sensor)) {
     99  1.1  kiyohara 		aprint_error_dev(self, "Unable to attach sysmon\n");
    100  1.1  kiyohara 		sysmon_envsys_destroy(sc->sc_sme);
    101  1.1  kiyohara 		return;
    102  1.1  kiyohara 	}
    103  1.1  kiyohara 
    104  1.1  kiyohara 	/* Hook into system monitor. */
    105  1.1  kiyohara 	sc->sc_sme->sme_name = device_xname(self);
    106  1.1  kiyohara 	sc->sc_sme->sme_cookie = sc;
    107  1.1  kiyohara 	sc->sc_sme->sme_refresh = mvsocts_refresh;
    108  1.1  kiyohara 	if (sysmon_envsys_register(sc->sc_sme)) {
    109  1.1  kiyohara 		aprint_error_dev(self, "Unable to register with sysmon\n");
    110  1.1  kiyohara 		sysmon_envsys_destroy(sc->sc_sme);
    111  1.1  kiyohara 	}
    112  1.1  kiyohara }
    113  1.1  kiyohara 
    114  1.1  kiyohara static void
    115  1.1  kiyohara mvsocts_refresh(struct sysmon_envsys *sme, envsys_data_t *edata)
    116  1.1  kiyohara {
    117  1.1  kiyohara 	struct mvsocts_softc *sc = sme->sme_cookie;
    118  1.1  kiyohara 	uint32_t val, uc, uk;
    119  1.1  kiyohara 
    120  1.1  kiyohara 	val = bus_space_read_4(sc->sc_iot, sc->sc_ioh, TS_STATUS);
    121  1.1  kiyohara 	if (!(val & STATUS_VALID)) {
    122  1.1  kiyohara 		aprint_error_dev(sc->sc_dev, "status value is invalid\n");
    123  1.1  kiyohara 		return;
    124  1.1  kiyohara 	}
    125  1.1  kiyohara 	uc = VAL2MCELSIUS(STATUS_VAL(val)) * 1000000;	/* uC */
    126  1.1  kiyohara 	uk = uc + 273150000;				/* convert to uKelvin */
    127  1.1  kiyohara 	sc->sc_sensor.value_cur = uk;
    128  1.1  kiyohara 	sc->sc_sensor.state = ENVSYS_SVALID;
    129  1.1  kiyohara }
    130