NetBSD/sys/dev/acpi/acpi_tz.c

316 lines
8.6 KiB
C

/* $NetBSD: acpi_tz.c,v 1.6 2003/11/03 18:07:10 mycroft Exp $ */
/*
* Copyright (c) 2003 Jared D. McNeill <jmcneill@invisible.ca>
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
/*
* ACPI Thermal Zone driver
*/
#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: acpi_tz.c,v 1.6 2003/11/03 18:07:10 mycroft Exp $");
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/kernel.h>
#include <sys/errno.h>
#include <sys/ioctl.h>
#include <sys/syslog.h>
#include <sys/device.h>
#include <sys/callout.h>
#include <sys/proc.h>
#include <sys/lock.h>
#include <dev/sysmon/sysmonvar.h>
#include <dev/acpi/acpica.h>
#include <dev/acpi/acpireg.h>
#include <dev/acpi/acpivar.h>
/* flags */
#define ATZ_F_VERBOSE 0x01 /* show events to console */
/* constants */
#define ATZ_TZP_RATE 300 /* default if no _TZP CM present (30 secs) */
#define ATZ_NLEVELS 10 /* number of cooling levels, from ACPI spec */
/* sensor indexes */
#define ATZ_SENSOR_TEMP 0 /* thermal zone temperature */
#define ATZ_NUMSENSORS 1 /* number of sensors */
const struct envsys_range acpitz_ranges[] = {
{ 0, 1, ATZ_SENSOR_TEMP },
};
int acpitz_match(struct device *, struct cfdata *, void *);
void acpitz_attach(struct device *, struct device *, void *);
/*
* ACPI Temperature Zone information. Note all temperatures are reported
* in tenths of degrees Kelvin
*/
struct acpitz_zone {
/* Active cooling temperature threshold */
UINT32 ac[ATZ_NLEVELS];
/* Package of references to all active cooling devices for a level */
ACPI_BUFFER al[ATZ_NLEVELS];
/* Critical temperature threshold for system shutdown */
UINT32 crt;
/* Critical temperature threshold for S4 sleep */
UINT32 hot;
/* Package of references to processor objects for passive cooling */
ACPI_BUFFER psl;
/* Passive cooling temperature threshold */
UINT32 psv;
/* Thermal constants for use in passive cooling formulas */
UINT32 tc1, tc2;
/* Current temperature of the thermal zone */
UINT32 tmp;
/* Thermal sampling period for passive cooling, in tenths of seconds */
UINT32 tsp;
/* Package of references to devices in this TZ (optional) */
ACPI_BUFFER tzd;
/* Recommended TZ polling frequency, in tenths of seconds */
UINT32 tzp;
};
struct acpitz_softc {
struct device sc_dev;
struct acpi_devnode *sc_devnode;
struct acpitz_zone sc_zone;
struct callout sc_callout;
struct envsys_tre_data sc_data[ATZ_NUMSENSORS];
struct envsys_basic_info sc_info[ATZ_NUMSENSORS];
struct sysmon_envsys sc_sysmon;
struct simplelock sc_slock;
int sc_flags;
int sc_rate; /* tz poll rate */
};
void acpitz_get_status(void *);
static void acpitz_print_status(struct acpitz_softc *);
void acpitz_notify_handler(ACPI_HANDLE, UINT32, void *);
static void acpitz_tick(void *);
static void acpitz_init_envsys(struct acpitz_softc *);
static int acpitz_gtredata(struct sysmon_envsys *,
struct envsys_tre_data *);
static int acpitz_streinfo(struct sysmon_envsys *,
struct envsys_basic_info *);
CFATTACH_DECL(acpitz, sizeof(struct acpitz_softc), acpitz_match,
acpitz_attach, NULL, NULL);
/*
* acpitz_match: autoconf(9) match routine
*/
int
acpitz_match(struct device *parent, struct cfdata *match, void *aux)
{
struct acpi_attach_args *aa = aux;
if (aa->aa_node->ad_type != ACPI_TYPE_THERMAL)
return 0;
return 1;
}
/*
* acpitz_attach: autoconf(9) attach routine
*/
void
acpitz_attach(struct device *parent, struct device *self, void *aux)
{
struct acpitz_softc *sc = (struct acpitz_softc *)self;
struct acpi_attach_args *aa = aux;
ACPI_STATUS rv;
#if 0
sc->sc_flags = ATZ_F_VERBOSE;
#endif
sc->sc_devnode = aa->aa_node;
printf(": ACPI Thermal Zone\n");
rv = acpi_eval_integer(sc->sc_devnode->ad_handle, "_TZP",
&sc->sc_zone.tzp);
if (ACPI_FAILURE(rv)) {
printf("%s: unable to get polling interval; using default of",
sc->sc_dev.dv_xname);
sc->sc_zone.tzp = ATZ_TZP_RATE;
} else {
printf("%s: polling interval is", sc->sc_dev.dv_xname);
}
printf(" %d.%ds\n", sc->sc_zone.tzp / 10, sc->sc_zone.tsp % 10);
/* XXX a value of 0 means "polling is not necessary" */
if (sc->sc_zone.tzp == 0)
sc->sc_zone.tzp = ATZ_TZP_RATE;
acpitz_get_status(sc);
rv = AcpiInstallNotifyHandler(sc->sc_devnode->ad_handle,
ACPI_SYSTEM_NOTIFY, acpitz_notify_handler, sc);
if (ACPI_FAILURE(rv)) {
printf("%s: unable to install SYSTEM NOTIFY handler: %s\n",
sc->sc_dev.dv_xname, AcpiFormatException(rv));
return;
}
callout_init(&sc->sc_callout);
callout_reset(&sc->sc_callout, (sc->sc_zone.tzp / 10) * hz,
acpitz_tick, sc);
acpitz_init_envsys(sc);
}
void
acpitz_get_status(void *opaque)
{
struct acpitz_softc *sc = opaque;
ACPI_STATUS rv;
rv = acpi_eval_integer(sc->sc_devnode->ad_handle, "_TMP",
&sc->sc_zone.tmp);
if (ACPI_FAILURE(rv)) {
printf("%s: failed to evaluate _TMP: %s\n",
sc->sc_dev.dv_xname, AcpiFormatException(rv));
return;
}
sc->sc_data[ATZ_SENSOR_TEMP].cur.data_us = sc->sc_zone.tmp * 100000;
sc->sc_data[ATZ_SENSOR_TEMP].validflags |= ENVSYS_FCURVALID;
if (sc->sc_flags & ATZ_F_VERBOSE)
acpitz_print_status(sc);
return;
}
static void
acpitz_print_status(struct acpitz_softc *sc)
{
printf("%s: zone temperature is now %d K\n", sc->sc_dev.dv_xname,
sc->sc_zone.tmp / 10);
return;
}
void
acpitz_notify_handler(ACPI_HANDLE hdl, UINT32 notify, void *opaque)
{
struct acpitz_softc *sc = opaque;
int rv;
switch (notify) {
case ACPI_NOTIFY_ThermalZoneStatusChanged:
case ACPI_NOTIFY_ThermalZoneTripPointsChanged:
rv = AcpiOsQueueForExecution(OSD_PRIORITY_LO,
acpitz_get_status, sc);
if (ACPI_FAILURE(rv)) {
printf("%s: unable to queue status check: %s\n",
sc->sc_dev.dv_xname, AcpiFormatException(rv));
}
break;
default:
printf("%s: received unhandled notify message 0x%x\n",
sc->sc_dev.dv_xname, notify);
break;
}
return;
}
static void
acpitz_tick(void *opaque)
{
struct acpitz_softc *sc = opaque;
callout_reset(&sc->sc_callout, (sc->sc_zone.tzp / 10) * hz,
acpitz_tick, opaque);
AcpiOsQueueForExecution(OSD_PRIORITY_LO, acpitz_get_status, sc);
return;
}
static void
acpitz_init_envsys(struct acpitz_softc *sc)
{
int i;
simple_lock_init(&sc->sc_slock);
for (i = 0; i < ATZ_NUMSENSORS; i++) {
sc->sc_data[i].sensor = sc->sc_info[i].sensor = i;
sc->sc_data[i].validflags = ENVSYS_FVALID;
sc->sc_info[i].validflags = ENVSYS_FVALID;
sc->sc_data[i].warnflags = ENVSYS_WARN_OK;
}
#define INITDATA(index, unit, string) \
sc->sc_data[index].units = unit; \
sc->sc_info[index].units = unit; \
snprintf(sc->sc_info[index].desc, sizeof(sc->sc_info[index].desc), \
"%s %s", sc->sc_dev.dv_xname, string);
INITDATA(ATZ_SENSOR_TEMP, ENVSYS_STEMP, "temperature");
/* hook into sysmon */
sc->sc_sysmon.sme_ranges = acpitz_ranges;
sc->sc_sysmon.sme_sensor_info = sc->sc_info;
sc->sc_sysmon.sme_sensor_data = sc->sc_data;
sc->sc_sysmon.sme_cookie = sc;
sc->sc_sysmon.sme_gtredata = acpitz_gtredata;
sc->sc_sysmon.sme_streinfo = acpitz_streinfo;
sc->sc_sysmon.sme_nsensors = ATZ_NUMSENSORS;
sc->sc_sysmon.sme_envsys_version = 1000;
if (sysmon_envsys_register(&sc->sc_sysmon))
printf("%s: unable to register with sysmon\n",
sc->sc_dev.dv_xname);
}
int
acpitz_gtredata(struct sysmon_envsys *sme, struct envsys_tre_data *tred)
{
struct acpitz_softc *sc = sme->sme_cookie;
simple_lock(&sc->sc_slock);
*tred = sc->sc_data[tred->sensor];
simple_unlock(&sc->sc_slock);
return 0;
}
int
acpitz_streinfo(struct sysmon_envsys *sme, struct envsys_basic_info *binfo)
{
/* XXX not implemented */
binfo->validflags = 0;
return 0;
}