Prototype ACPI Control Method Battery driver.
ACPI defines two different battery device interfaces: "Control Method" batteries, in which AML methods are defined in order to get battery status and set battery alarm thresholds, and a "Smart Battery" device, which is an SMbus device accessed through the ACPI Embedded Controller device; this driver knows how to attach to the former sort of device. As a total kludge, since we haven't wired things up to sysmon/envsys yet, we report battery status through a once-per-minute kernel printf, so don't use this driver yet if you want your disk to spin down. Motivated by and tested on Sony PCG-R505TL laptop, which has nonfunctional APM. configure as: acpibat* at acpi ? Sample output: acpibat0 at acpi0: ACPI Battery acpibat0: Sony Corp. LION acpibat0: Design 38480mWh, Predicted 38480mWh Warn 120mWh Low 0mWh acpibat0: discharging: 15112mV cap 25480mWh (66%) rate 16849mW ... acpibat0: discharging: 15224mV cap 25070mWh (65%) rate 18405mW ... acpibat0: discharging: 15200mV cap 24310mWh (63%) rate 13771mW ... acpibat0: charging: 15768mV cap 23330mWh (60%) rate 20388mW
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sommerfeld
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/* $NetBSD: acpi_bat.c,v 1.1 2002/03/24 03:46:10 sommerfeld Exp $ */
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/*
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* Copyright 2001 Bill Sommerfeld.
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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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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed for the NetBSD Project by
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* Wasabi Systems, Inc.
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* 4. The name of Wasabi Systems, Inc. may not be used to endorse
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* or promote products derived from this software without specific prior
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* written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY WASABI SYSTEMS, INC. ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL WASABI SYSTEMS, INC
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, 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 ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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#define ACPI_BAT_DEBUG
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/*
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* ACPI Battery Driver.
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*
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* ACPI defines two different battery device interfaces: "Control
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* Method" batteries, in which AML methods are defined in order to get
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* battery status and set battery alarm thresholds, and a "Smart
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* Battery" device, which is an SMbus device accessed through the ACPI
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* Embedded Controller device.
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*
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* This driver is for the "Control Method"-style battery only.
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*/
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#include <sys/cdefs.h>
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__KERNEL_RCSID(0, "$NetBSD: acpi_bat.c,v 1.1 2002/03/24 03:46:10 sommerfeld 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> /* for hz */
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#include <sys/device.h>
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#include <sys/callout.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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struct acpibat_softc {
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struct device sc_dev; /* base device glue */
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struct acpi_devnode *sc_node; /* our ACPI devnode */
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int sc_flags; /* see below */
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struct callout sc_callout; /* XXX temporary polling */
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int sc_status; /* power status */
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int sc_rate; /* current drain rate */
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int sc_capacity; /* current capacity */
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int sc_mv; /* current potential in mV */
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int sc_design_capacity; /* design capacity */
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int sc_pred_capacity; /* estimated current max */
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int sc_warn_capacity; /* warning level */
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int sc_low_capacity; /* low level */
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};
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#define ABAT_F_VERBOSE 0x01 /* verbose events */
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#define ABAT_F_PWRUNIT_MA 0x02 /* mA instead of mW */
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#define ACM_RATEUNIT(sc) (((sc)->sc_flags & ABAT_F_PWRUNIT_MA)?"mA":"mW")
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#define ACM_CAPUNIT(sc) (((sc)->sc_flags & ABAT_F_PWRUNIT_MA)?"mAh":"mWh")
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int acpibat_match(struct device *, struct cfdata *, void *);
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void acpibat_attach(struct device *, struct device *, void *);
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struct cfattach acpibat_ca = {
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sizeof(struct acpibat_softc), acpibat_match, acpibat_attach,
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};
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static void acpibat_get_status(void *);
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static void acpibat_get_info(void *);
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void acpibat_notify_handler(ACPI_HANDLE, UINT32, void *context);
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static void acpibat_tick(void *);
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/*
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* acpibat_match:
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*
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* Autoconfiguration `match' routine.
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*/
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int
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acpibat_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_DEVICE)
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return (0);
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if (strcmp(aa->aa_node->ad_devinfo.HardwareId, "PNP0C0A") == 0)
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return (1);
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return (0);
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}
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/*
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* acpibat_attach:
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*
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* Autoconfiguration `attach' routine.
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*/
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void
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acpibat_attach(struct device *parent, struct device *self, void *aux)
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{
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struct acpibat_softc *sc = (void *) self;
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struct acpi_attach_args *aa = aux;
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ACPI_STATUS rv;
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printf(": ACPI Battery\n");
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sc->sc_node = aa->aa_node;
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rv = AcpiInstallNotifyHandler(sc->sc_node->ad_handle,
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ACPI_DEVICE_NOTIFY, acpibat_notify_handler, sc);
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if (rv != AE_OK) {
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printf("%s: unable to register DEVICE NOTIFY handler: %d\n",
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sc->sc_dev.dv_xname, rv);
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return;
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}
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/* XXX See acpibat_notify_handler() */
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rv = AcpiInstallNotifyHandler(sc->sc_node->ad_handle,
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ACPI_SYSTEM_NOTIFY, acpibat_notify_handler, sc);
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if (rv != AE_OK) {
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printf("%s: unable to register SYSTEM NOTIFY handler: %d\n",
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sc->sc_dev.dv_xname, rv);
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return;
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}
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/*
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* XXX poll battery in the driver for now.
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* in the future, when we have an API, let userland do this polling
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*/
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callout_init(&sc->sc_callout);
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callout_reset(&sc->sc_callout, 60*hz, acpibat_tick, sc);
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/* Display the current state. */
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sc->sc_flags = ABAT_F_VERBOSE;
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acpibat_get_info(sc);
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acpibat_get_status(sc);
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/*
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* XXX Hook into sysmon here.
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*/
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}
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static void
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acpibat_tick(void *arg)
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{
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struct acpibat_softc *sc = arg;
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callout_reset(&sc->sc_callout, 60*hz, acpibat_tick, arg);
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AcpiOsQueueForExecution(OSD_PRIORITY_LO, acpibat_get_status, sc);
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}
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/*
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* acpibat_get_info
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*
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* Get, and possibly display, the battery info.
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*/
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static void
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acpibat_get_info(void *arg)
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{
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struct acpibat_softc *sc = arg;
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ACPI_OBJECT *p1, *p2;
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ACPI_STATUS rv;
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ACPI_BUFFER buf;
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rv = acpi_eval_struct(sc->sc_node->ad_handle, "_BIF", &buf);
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if (rv != AE_OK) {
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printf("%s: failed to evaluate _BIF: %x\n",
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sc->sc_dev.dv_xname, rv);
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return;
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}
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p1 = (ACPI_OBJECT *)buf.Pointer;
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if (p1->Type != ACPI_TYPE_PACKAGE) {
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printf("%s: expected PACKAGE, got %d\n", sc->sc_dev.dv_xname,
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p1->Type);
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goto out;
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}
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if (p1->Package.Count < 13)
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printf("%s: expected 13 elts, got %d\n",
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sc->sc_dev.dv_xname, p1->Package.Count);
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p2 = p1->Package.Elements;
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if (p2[0].Integer.Value == 1)
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sc->sc_flags |= ABAT_F_PWRUNIT_MA;
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sc->sc_design_capacity = p2[1].Integer.Value;
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sc->sc_pred_capacity = p2[2].Integer.Value;
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sc->sc_warn_capacity = p2[6].Integer.Value;
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sc->sc_low_capacity = p2[7].Integer.Value;
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printf("%s: %s %s %s %s\n",
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sc->sc_dev.dv_xname,
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p2[12].String.Pointer, p2[11].String.Pointer,
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p2[9].String.Pointer, p2[10].String.Pointer);
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printf("%s: Design %d%s, Predicted %d%s Warn %d%s Low %d%s\n",
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sc->sc_dev.dv_xname,
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sc->sc_design_capacity, ACM_CAPUNIT(sc),
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sc->sc_pred_capacity, ACM_CAPUNIT(sc),
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sc->sc_warn_capacity, ACM_CAPUNIT(sc),
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sc->sc_low_capacity, ACM_CAPUNIT(sc));
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out:
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AcpiOsFree(buf.Pointer);
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}
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/*
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* acpibat_get_status:
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*
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* Get, and possibly display, the current battery line status.
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*/
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static void
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acpibat_get_status(void *arg)
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{
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struct acpibat_softc *sc = arg;
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ACPI_OBJECT *p1, *p2;
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ACPI_STATUS rv;
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ACPI_BUFFER buf;
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rv = acpi_eval_struct(sc->sc_node->ad_handle, "_BST", &buf);
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if (rv != AE_OK) {
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printf("bat: failed to evaluate _BIF: %x\n", rv);
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return;
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}
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p1 = (ACPI_OBJECT *)buf.Pointer;
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if (p1->Type != ACPI_TYPE_PACKAGE) {
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printf("bat: expected PACKAGE, got %d\n", p1->Type);
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goto out;
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}
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if (p1->Package.Count < 4)
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printf("bat: expected 4 elts, got %d\n", p1->Package.Count);
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p2 = p1->Package.Elements;
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sc->sc_status = p2[0].Integer.Value;
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sc->sc_rate = p2[1].Integer.Value;
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sc->sc_capacity = p2[2].Integer.Value;
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sc->sc_mv = p2[3].Integer.Value;
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if (sc->sc_flags & ABAT_F_VERBOSE) {
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printf("%s: %s%s: %dmV cap %d%s (%d%%) rate %d%s\n",
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sc->sc_dev.dv_xname,
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(sc->sc_status&4) ? "CRITICAL ":"",
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(sc->sc_status&1) ? "discharging" : (
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(sc->sc_status & 2) ? "charging" : "idle"),
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sc->sc_mv,
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sc->sc_capacity,
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ACM_CAPUNIT(sc),
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(sc->sc_capacity * 100) / sc->sc_design_capacity,
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sc->sc_rate,
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ACM_RATEUNIT(sc));
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}
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out:
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AcpiOsFree(buf.Pointer);
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}
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/*
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* acpibat_notify_handler:
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*
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* Callback from ACPI interrupt handler to notify us of an event.
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*/
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void
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acpibat_notify_handler(ACPI_HANDLE handle, UINT32 notify, void *context)
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{
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struct acpibat_softc *sc = context;
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int rv;
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switch (notify) {
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case ACPI_NOTIFY_BusCheck:
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case ACPI_NOTIFY_BatteryStatusChanged:
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case ACPI_NOTIFY_BatteryInformationChanged:
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#ifdef ACPI_BAT_DEBUG
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printf("%s: received notify message: 0x%x\n",
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sc->sc_dev.dv_xname, notify);
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#endif
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rv = AcpiOsQueueForExecution(OSD_PRIORITY_LO,
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acpibat_get_status, sc);
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if (rv != AE_OK)
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printf("%s: unable to queue status check: %d\n",
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sc->sc_dev.dv_xname, rv);
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break;
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default:
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printf("%s: received unknown notify message: 0x%x\n",
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sc->sc_dev.dv_xname, notify);
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}
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}
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@ -1,4 +1,4 @@
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# $NetBSD: files.acpi,v 1.4 2001/11/28 10:21:21 lukem Exp $
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# $NetBSD: files.acpi,v 1.5 2002/03/24 03:46:10 sommerfeld Exp $
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include "dev/acpi/acpica/files.acpica"
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@ -28,3 +28,8 @@ file dev/acpi/acpi_button.c acpibut
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device acpiacad
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attach acpiacad at acpi
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file dev/acpi/acpi_acad.c acpiacad
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# ACPI Control Method Battery
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device acpibat
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attach acpibat at acpi
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file dev/acpi/acpi_bat.c acpibat
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