Initial support for ACPI Thermal Zones. For now, we only export the zone
temperature to sysmon; in the near future we should be associating devices in this thermal zone with this device so we can do active or passive cooling on a zone-by-zone basis.
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jmcneill
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4d5c7fa4ba
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1e3dfcd74c
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/* $NetBSD: acpi_tz.c,v 1.1 2003/01/04 05:36:03 jmcneill Exp $ */
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/*
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* Copyright (c) 2003 Jared D. McNeill <jmcneill@invisible.ca>
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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. The name of the author 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 AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
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* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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/*
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* ACPI Thermal Zone driver
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*/
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#include <sys/cdefs.h>
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__KERNEL_RCSID(0, "$NetBSD: acpi_tz.c,v 1.1 2003/01/04 05:36:03 jmcneill Exp $");
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/kernel.h>
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#include <sys/errno.h>
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#include <sys/ioctl.h>
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#include <sys/syslog.h>
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#include <sys/device.h>
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#include <sys/callout.h>
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#include <sys/proc.h>
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#include <sys/lock.h>
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#include <dev/sysmon/sysmonvar.h>
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#include <dev/acpi/acpica.h>
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#include <dev/acpi/acpireg.h>
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#include <dev/acpi/acpivar.h>
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/* flags */
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#define ATZ_F_VERBOSE 0x01 /* show events to console */
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/* constants */
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#define ATZ_TZP_RATE 300 /* default if no _TZP CM present (30 secs) */
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#define ATZ_NLEVELS 10 /* number of cooling levels, from ACPI spec */
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/* sensor indexes */
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#define ATZ_SENSOR_TEMP 0 /* thermal zone temperature */
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#define ATZ_NUMSENSORS 1 /* number of sensors */
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const struct envsys_range acpitz_ranges[] = {
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{ 0, 1, ATZ_SENSOR_TEMP },
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};
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int acpitz_match(struct device *, struct cfdata *, void *);
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void acpitz_attach(struct device *, struct device *, void *);
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/*
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* ACPI Temperature Zone information. Note all temperatures are reported
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* in tenths of degrees Kelvin
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*/
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struct acpitz_zone {
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/* Active cooling temperature threshold */
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UINT32 ac[ATZ_NLEVELS];
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/* Package of references to all active cooling devices for a level */
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ACPI_BUFFER al[ATZ_NLEVELS];
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/* Critical temperature threshold for system shutdown */
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UINT32 crt;
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/* Critical temperature threshold for S4 sleep */
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UINT32 hot;
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/* Package of references to processor objects for passive cooling */
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ACPI_BUFFER psl;
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/* Passive cooling temperature threshold */
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UINT32 psv;
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/* Thermal constants for use in passive cooling formulas */
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UINT32 tc1, tc2;
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/* Current temperature of the thermal zone */
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UINT32 tmp;
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/* Thermal sampling period for passive cooling, in tenths of seconds */
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UINT32 tsp;
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/* Package of references to devices in this TZ (optional) */
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ACPI_BUFFER tzd;
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/* Recommended TZ polling frequency, in tenths of seconds */
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UINT32 tzp;
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};
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struct acpitz_softc {
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struct device sc_dev;
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struct acpi_devnode *sc_devnode;
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struct acpitz_zone sc_zone;
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struct callout sc_callout;
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struct envsys_tre_data sc_data[ATZ_NUMSENSORS];
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struct envsys_basic_info sc_info[ATZ_NUMSENSORS];
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struct sysmon_envsys sc_sysmon;
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struct simplelock sc_slock;
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int sc_flags;
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int sc_rate; /* tz poll rate */
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};
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void acpitz_get_status(void *);
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static void acpitz_print_status(struct acpitz_softc *);
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void acpitz_notify_handler(ACPI_HANDLE, UINT32, void *);
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int acpitz_get_integer(struct acpitz_softc *, char *, UINT32 *);
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static void acpitz_tick(void *);
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static void acpitz_init_envsys(struct acpitz_softc *);
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static int acpitz_gtredata(struct sysmon_envsys *,
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struct envsys_tre_data *);
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static int acpitz_streinfo(struct sysmon_envsys *,
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struct envsys_basic_info *);
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CFATTACH_DECL(acpitz, sizeof(struct acpitz_softc), acpitz_match,
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acpitz_attach, NULL, NULL);
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/*
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* acpitz_match: autoconf(9) match routine
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*/
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int
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acpitz_match(struct device *parent, struct cfdata *match, void *aux)
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{
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struct acpi_attach_args *aa = aux;
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if (aa->aa_node->ad_type != ACPI_TYPE_THERMAL)
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return 0;
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return 1;
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}
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/*
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* acpitz_attach: autoconf(9) attach routine
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*/
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void
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acpitz_attach(struct device *parent, struct device *self, void *aux)
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{
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struct acpitz_softc *sc = (struct acpitz_softc *)self;
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struct acpi_attach_args *aa = aux;
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ACPI_STATUS rv;
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#if 0
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sc->sc_flags = ATZ_F_VERBOSE;
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#endif
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sc->sc_devnode = aa->aa_node;
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printf(": ACPI Thermal Zone\n");
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if (acpitz_get_integer(sc, "_TZP", &sc->sc_zone.tzp)) {
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printf("%s: unable to get poll rate, using default\n",
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sc->sc_dev.dv_xname);
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sc->sc_zone.tzp = ATZ_TZP_RATE;
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}
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/* XXX a value of 0 means "polling is not necessary" */
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if (sc->sc_zone.tzp == 0)
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sc->sc_zone.tzp = ATZ_TZP_RATE;
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acpitz_get_status(sc);
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rv = AcpiInstallNotifyHandler(sc->sc_devnode->ad_handle,
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ACPI_DEVICE_NOTIFY, acpitz_notify_handler, sc);
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if (rv != AE_OK) {
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printf("%s: unable to install device notify handler\n",
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sc->sc_dev.dv_xname);
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return;
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}
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rv = AcpiInstallNotifyHandler(sc->sc_devnode->ad_handle,
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ACPI_SYSTEM_NOTIFY, acpitz_notify_handler, sc);
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if (rv != AE_OK) {
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printf("%s: unable to install system notify handler\n",
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sc->sc_dev.dv_xname);
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return;
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}
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callout_init(&sc->sc_callout);
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callout_reset(&sc->sc_callout, (sc->sc_zone.tzp / 10) * hz,
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acpitz_tick, sc);
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acpitz_init_envsys(sc);
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}
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void
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acpitz_get_status(void *opaque)
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{
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struct acpitz_softc *sc = opaque;
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acpitz_get_integer(sc, "_TMP", &sc->sc_zone.tmp);
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sc->sc_data[ATZ_SENSOR_TEMP].cur.data_us = sc->sc_zone.tmp * 100000;
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if (sc->sc_flags & ATZ_F_VERBOSE)
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acpitz_print_status(sc);
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return;
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}
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static void
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acpitz_print_status(struct acpitz_softc *sc)
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{
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printf("%s: zone temperature is now %d K\n", sc->sc_dev.dv_xname,
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sc->sc_zone.tmp / 10);
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return;
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}
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void
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acpitz_notify_handler(ACPI_HANDLE hdl, UINT32 notify, void *opaque)
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{
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struct acpitz_softc *sc = opaque;
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int rv;
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switch (notify) {
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case ACPI_NOTIFY_ThermalZoneStatusChanged:
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case ACPI_NOTIFY_ThermalZoneTripPointsChanged:
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rv = AcpiOsQueueForExecution(OSD_PRIORITY_LO,
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acpitz_get_status, sc);
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if (rv != AE_OK) {
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printf("%s: unable to queue status check\n",
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sc->sc_dev.dv_xname);
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}
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break;
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default:
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printf("%s: received unhandled notify message %d\n",
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sc->sc_dev.dv_xname, notify);
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break;
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}
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return;
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}
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int
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acpitz_get_integer(struct acpitz_softc *sc, char *cm, UINT32 *rv)
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{
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ACPI_STATUS status;
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status = acpi_eval_integer(sc->sc_devnode->ad_handle, cm, rv);
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if (status != AE_OK) {
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#ifdef ACPI_DEBUG
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printf("%s: failed to evalulate %s: %x\n", sc->sc_dev.dv_xname,
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cm, status);
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#endif
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return 1;
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}
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return 0;
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}
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static void
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acpitz_tick(void *opaque)
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{
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struct acpitz_softc *sc = opaque;
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callout_reset(&sc->sc_callout, (sc->sc_zone.tzp / 10) * hz,
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acpitz_tick, opaque);
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AcpiOsQueueForExecution(OSD_PRIORITY_LO, acpitz_get_status, sc);
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return;
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}
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static void
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acpitz_init_envsys(struct acpitz_softc *sc)
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{
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int i;
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simple_lock_init(&sc->sc_slock);
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for (i = 0; i < ATZ_NUMSENSORS; i++) {
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sc->sc_data[i].sensor = sc->sc_info[i].sensor = i;
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sc->sc_data[i].validflags = (ENVSYS_FVALID | ENVSYS_FCURVALID);
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sc->sc_info[i].validflags = ENVSYS_FVALID;
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sc->sc_data[i].warnflags = ENVSYS_WARN_OK;
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}
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#define INITDATA(index, unit, string) \
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sc->sc_data[index].units = unit; \
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sc->sc_info[index].units = unit; \
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snprintf(sc->sc_info[index].desc, sizeof(sc->sc_info[index].desc), \
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"%s %s", sc->sc_dev.dv_xname, string);
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INITDATA(ATZ_SENSOR_TEMP, ENVSYS_STEMP, "temperature");
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/* hook into sysmon */
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sc->sc_sysmon.sme_ranges = acpitz_ranges;
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sc->sc_sysmon.sme_sensor_info = sc->sc_info;
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sc->sc_sysmon.sme_sensor_data = sc->sc_data;
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sc->sc_sysmon.sme_cookie = sc;
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sc->sc_sysmon.sme_gtredata = acpitz_gtredata;
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sc->sc_sysmon.sme_streinfo = acpitz_streinfo;
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sc->sc_sysmon.sme_nsensors = ATZ_NUMSENSORS;
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sc->sc_sysmon.sme_envsys_version = 1000;
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if (sysmon_envsys_register(&sc->sc_sysmon))
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printf("%s: unable to register with sysmon\n",
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sc->sc_dev.dv_xname);
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}
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int
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acpitz_gtredata(struct sysmon_envsys *sme, struct envsys_tre_data *tred)
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{
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struct acpitz_softc *sc = sme->sme_cookie;
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simple_lock(&sc->sc_slock);
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*tred = sc->sc_data[tred->sensor];
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simple_unlock(&sc->sc_slock);
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return 0;
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}
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int
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acpitz_streinfo(struct sysmon_envsys *sme, struct envsys_basic_info *binfo)
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{
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/* XXX not implemented */
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binfo->validflags = 0;
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return 0;
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}
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@ -1,4 +1,4 @@
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# $NetBSD: files.acpi,v 1.12 2002/12/31 05:26:57 explorer Exp $
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# $NetBSD: files.acpi,v 1.13 2003/01/04 05:36:03 jmcneill Exp $
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include "dev/acpi/acpica/files.acpica"
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@ -34,6 +34,11 @@ device acpibat: sysmon_envsys
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attach acpibat at acpi
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file dev/acpi/acpi_bat.c acpibat
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# ACPI Thermal Zone
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device acpitz: sysmon_envsys
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attach acpitz at acpi
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file dev/acpi/acpi_tz.c acpitz
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# Serial interface
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attach com at acpi with com_acpi
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file dev/acpi/com_acpi.c com_acpi
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