da3f163bd2
(Part 2: drivers) * Support for detachable sensors. * Cleaned up the API for simplicity and efficiency. * Ability to send capacity/critical/warning events to powerd(8). * Adapted all the code to the new locking order. * Compatibility with the old envsys API: the ENVSYS_GTREINFO and ENVSYS_GTREDATA ioctl(2)s are supported. * Added support for a 'dictionary based communication channel' between sysmon_power(9) and powerd(8), that means there is no 32 bytes event size restriction anymore. * Binary compatibility with old envstat(8) and powerd(8) via COMPAT_40. * All drivers with the n^2 gtredata bug were fixed, PR kern/36226. Tested by: blymn: smsc(4). bouyer: ipmi(4), mfi(4). kefren: ug(4). njoly: viaenv(4), adt7463.c. riz: owtemp(4). xtraeme: acpiacad(4), acpibat(4), acpitz(4), aiboost(4), it(4), lm(4).
166 lines
5.0 KiB
C
166 lines
5.0 KiB
C
/* $NetBSD: tmp121.c,v 1.2 2007/07/01 07:37:21 xtraeme Exp $ */
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/*-
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* Copyright (c) 2006 Urbana-Champaign Independent Media Center.
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* Copyright (c) 2006 Garrett D'Amore.
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* All rights reserved.
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*
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* Portions of this code were written by Garrett D'Amore for the
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* Champaign-Urbana Community Wireless Network Project.
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*
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* Redistribution and use in source and binary forms, with or
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* without modification, are permitted provided that the following
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* conditions 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
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* copyright notice, this list of conditions and the following
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* disclaimer in the documentation and/or other materials provided
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* with the distribution.
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* 3. All advertising materials mentioning features or use of this
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* software must display the following acknowledgements:
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* This product includes software developed by the Urbana-Champaign
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* Independent Media Center.
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* This product includes software developed by Garrett D'Amore.
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* 4. Urbana-Champaign Independent Media Center's name and Garrett
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* D'Amore's name may not be used to endorse or promote products
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* derived from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE URBANA-CHAMPAIGN INDEPENDENT
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* MEDIA CENTER AND GARRETT D'AMORE ``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
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* ARE DISCLAIMED. IN NO EVENT SHALL THE URBANA-CHAMPAIGN INDEPENDENT
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* MEDIA CENTER OR GARRETT D'AMORE BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
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* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
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* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
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* ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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__KERNEL_RCSID(0, "$NetBSD: tmp121.c,v 1.2 2007/07/01 07:37:21 xtraeme Exp $");
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/device.h>
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#include <sys/kernel.h>
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#include <dev/sysmon/sysmonvar.h>
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#include <dev/spi/spivar.h>
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struct tmp121temp_softc {
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struct device sc_dev;
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struct spi_handle *sc_sh;
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struct envsys_data sc_sensor[1];
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struct sysmon_envsys sc_sysmon;
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};
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static int tmp121temp_match(struct device *, struct cfdata *, void *);
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static void tmp121temp_attach(struct device *, struct device *, void *);
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static int tmp121temp_gtredata(struct sysmon_envsys *, envsys_data_t *);
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CFATTACH_DECL(tmp121temp, sizeof(struct tmp121temp_softc),
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tmp121temp_match, tmp121temp_attach, NULL, NULL);
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static int
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tmp121temp_match(struct device *parent, struct cfdata *cf, void *aux)
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{
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struct spi_attach_args *sa = aux;
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/* configure for 10MHz */
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if (spi_configure(sa->sa_handle, SPI_MODE_0, 1000000))
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return 0;
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return 1;
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}
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static void
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tmp121temp_attach(struct device *parent, struct device *self, void *aux)
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{
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struct tmp121temp_softc *sc = device_private(self);
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struct spi_attach_args *sa = aux;
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prop_string_t desc;
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aprint_naive(": Temperature Sensor\n");
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aprint_normal(": TI TMP121 Temperature Sensor\n");
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sc->sc_sh = sa->sa_handle;
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sc->sc_sensor[0].sensor = 0;
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sc->sc_sensor[0].state = ENVSYS_SVALID;
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sc->sc_sensor[0].units = ENVSYS_STEMP;
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/*
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* set up the description, which we allow MD code to override in
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* a property.
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*/
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desc = prop_dictionary_get(device_properties(self),
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"envsys-description");
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if (desc != NULL &&
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prop_object_type(desc) == PROP_TYPE_STRING &&
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prop_string_size(desc) > 0)
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strcpy(sc->sc_sensor[0].desc, prop_string_cstring_nocopy(desc));
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else
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strcpy(sc->sc_sensor[0].desc, device_xname(self));
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sc->sc_sysmon.sme_name = device_xname(self);
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sc->sc_sysmon.sme_sensor_data = sc->sc_sensor;
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sc->sc_sysmon.sme_gtredata = tmp121temp_gtredata;
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sc->sc_sysmon.sme_cookie = sc;
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sc->sc_sysmon.sme_nsensors = 1;
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if (sysmon_envsys_register(&sc->sc_sysmon))
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aprint_error("%s: unable to register with sysmon\n",
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device_xname(self));
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}
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static void
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tmp121temp_refresh(struct tmp121temp_softc *sc)
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{
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uint16_t reg;
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int16_t sreg;
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int val;
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if (spi_recv(sc->sc_sh, 2, (uint8_t *)®) != 0) {
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sc->sc_sensor[0].state = ENVSYS_SINVALID;
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return;
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}
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sreg = (int16_t)be16toh(reg);
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/*
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* convert to uK:
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*
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* TMP121 bits:
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* D15 : sign bit
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* D14-D3 : data (D14 is MSB)
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* D2-D0 : zero
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*
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* The data is represented in units of 0.0625 deg C.
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*/
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sreg >>= 3;
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val = sreg * 62500 + 273150000;
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sc->sc_sensor[0].value_cur = val;
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sc->sc_sensor[0].state = ENVSYS_SVALID;
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}
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static int
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tmp121temp_gtredata(struct sysmon_envsys *sme, envsys_data_t *edata)
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{
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struct tmp121temp_softc *sc = sme->sme_cookie;
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tmp121temp_refresh(sc);
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return (0);
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}
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