/* $NetBSD: acpi_bat.c,v 1.5 2002/09/27 20:37:33 thorpej Exp $ */ /* * Copyright 2001 Bill Sommerfeld. * 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. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * 3. All advertising materials mentioning features or use of this software * must display the following acknowledgement: * This product includes software developed for the NetBSD Project by * Wasabi Systems, Inc. * 4. The name of Wasabi Systems, Inc. may not be used to endorse * or promote products derived from this software without specific prior * written permission. * * THIS SOFTWARE IS PROVIDED BY WASABI SYSTEMS, INC. ``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 WASABI SYSTEMS, INC * 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. */ #define ACPI_BAT_DEBUG /* * ACPI 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 is for the "Control Method"-style battery only. */ #include __KERNEL_RCSID(0, "$NetBSD: acpi_bat.c,v 1.5 2002/09/27 20:37:33 thorpej Exp $"); #include #include #include /* for hz */ #include #include #include #include #include #define BAT_WORDS 13 struct acpibat_softc { struct device sc_dev; /* base device glue */ struct acpi_devnode *sc_node; /* our ACPI devnode */ int sc_flags; /* see below */ struct callout sc_callout; /* XXX temporary polling */ int sc_status; /* power status */ int sc_rate; /* current drain rate */ int sc_capacity; /* current capacity */ int sc_mv; /* current potential in mV */ int sc_design_capacity; /* design capacity */ int sc_pred_capacity; /* estimated current max */ int sc_warn_capacity; /* warning level */ int sc_low_capacity; /* low level */ ACPI_OBJECT sc_Ret[BAT_WORDS]; /* Return Buffer */ }; #define ABAT_F_VERBOSE 0x01 /* verbose events */ #define ABAT_F_PWRUNIT_MA 0x02 /* mA instead of mW */ #define ACM_RATEUNIT(sc) (((sc)->sc_flags & ABAT_F_PWRUNIT_MA)?"A":"W") #define ACM_CAPUNIT(sc) (((sc)->sc_flags & ABAT_F_PWRUNIT_MA)?"Ah":"Wh") #define ACM_SCALE(x) ((x) / 1000), ((x) % 1000) int acpibat_match(struct device *, struct cfdata *, void *); void acpibat_attach(struct device *, struct device *, void *); const struct cfattach acpibat_ca = { sizeof(struct acpibat_softc), acpibat_match, acpibat_attach, }; static void acpibat_get_status(void *); static void acpibat_get_info(void *); void acpibat_notify_handler(ACPI_HANDLE, UINT32, void *context); static void acpibat_tick(void *); /* * acpibat_match: * * Autoconfiguration `match' routine. */ int acpibat_match(struct device *parent, struct cfdata *match, void *aux) { struct acpi_attach_args *aa = aux; if (aa->aa_node->ad_type != ACPI_TYPE_DEVICE) return (0); if (strcmp(aa->aa_node->ad_devinfo.HardwareId, "PNP0C0A") == 0) return (1); return (0); } /* * acpibat_attach: * * Autoconfiguration `attach' routine. */ void acpibat_attach(struct device *parent, struct device *self, void *aux) { struct acpibat_softc *sc = (void *) self; struct acpi_attach_args *aa = aux; ACPI_STATUS rv; printf(": ACPI Battery\n"); sc->sc_node = aa->aa_node; rv = AcpiInstallNotifyHandler(sc->sc_node->ad_handle, ACPI_DEVICE_NOTIFY, acpibat_notify_handler, sc); if (rv != AE_OK) { printf("%s: unable to register DEVICE NOTIFY handler: %d\n", sc->sc_dev.dv_xname, rv); return; } /* XXX See acpibat_notify_handler() */ rv = AcpiInstallNotifyHandler(sc->sc_node->ad_handle, ACPI_SYSTEM_NOTIFY, acpibat_notify_handler, sc); if (rv != AE_OK) { printf("%s: unable to register SYSTEM NOTIFY handler: %d\n", sc->sc_dev.dv_xname, rv); return; } /* * XXX poll battery in the driver for now. * in the future, when we have an API, let userland do this polling */ callout_init(&sc->sc_callout); callout_reset(&sc->sc_callout, 60*hz, acpibat_tick, sc); /* Display the current state. */ sc->sc_flags = ABAT_F_VERBOSE; acpibat_get_info(sc); acpibat_get_status(sc); /* * XXX Hook into sysmon here. */ } static void acpibat_tick(void *arg) { struct acpibat_softc *sc = arg; callout_reset(&sc->sc_callout, 60*hz, acpibat_tick, arg); AcpiOsQueueForExecution(OSD_PRIORITY_LO, acpibat_get_status, sc); } /* * acpibat_get_info * * Get, and possibly display, the battery info. */ static void acpibat_get_info(void *arg) { struct acpibat_softc *sc = arg; ACPI_OBJECT *p1, *p2; ACPI_STATUS rv; ACPI_BUFFER buf; rv = acpi_eval_struct(sc->sc_node->ad_handle, "_BIF", &buf); if (rv != AE_OK) { printf("%s: failed to evaluate _BIF: %x\n", sc->sc_dev.dv_xname, rv); return; } p1 = (ACPI_OBJECT *)buf.Pointer; if (p1->Type != ACPI_TYPE_PACKAGE) { printf("%s: expected PACKAGE, got %d\n", sc->sc_dev.dv_xname, p1->Type); goto out; } if (p1->Package.Count < 13) printf("%s: expected 13 elts, got %d\n", sc->sc_dev.dv_xname, p1->Package.Count); p2 = p1->Package.Elements; if (p2[0].Integer.Value == 1) sc->sc_flags |= ABAT_F_PWRUNIT_MA; sc->sc_design_capacity = p2[1].Integer.Value; sc->sc_pred_capacity = p2[2].Integer.Value; sc->sc_warn_capacity = p2[6].Integer.Value; sc->sc_low_capacity = p2[7].Integer.Value; printf("%s: %s %s %s %s\n", sc->sc_dev.dv_xname, p2[12].String.Pointer, p2[11].String.Pointer, p2[9].String.Pointer, p2[10].String.Pointer); printf("%s: Design %d.%03d%s, Predicted %d.%03d%s Warn %d.%03d%s Low %d.%03d%s\n", sc->sc_dev.dv_xname, ACM_SCALE(sc->sc_design_capacity), ACM_CAPUNIT(sc), ACM_SCALE(sc->sc_pred_capacity), ACM_CAPUNIT(sc), ACM_SCALE(sc->sc_warn_capacity), ACM_CAPUNIT(sc), ACM_SCALE(sc->sc_low_capacity), ACM_CAPUNIT(sc)); out: AcpiOsFree(buf.Pointer); } /* * acpibat_get_status: * * Get, and possibly display, the current battery line status. */ static void acpibat_get_status(void *arg) { struct acpibat_softc *sc = arg; ACPI_OBJECT *p1, *p2; ACPI_STATUS rv; ACPI_BUFFER buf; buf.Pointer = sc->sc_Ret; buf.Length = sizeof(sc->sc_Ret); rv = AcpiEvaluateObject(sc->sc_node->ad_handle, "_BST", NULL, &buf); if (rv != AE_OK) { printf("bat: failed to evaluate _BST: %x\n", rv); return; } p1 = (ACPI_OBJECT *)buf.Pointer; if (p1->Type != ACPI_TYPE_PACKAGE) { printf("bat: expected PACKAGE, got %d\n", p1->Type); return; } if (p1->Package.Count < 4) printf("bat: expected 4 elts, got %d\n", p1->Package.Count); p2 = p1->Package.Elements; sc->sc_status = p2[0].Integer.Value; sc->sc_rate = p2[1].Integer.Value; sc->sc_capacity = p2[2].Integer.Value; sc->sc_mv = p2[3].Integer.Value; if (sc->sc_flags & ABAT_F_VERBOSE) { printf("%s: %s%s: %d.%03dV cap %d.%03d%s (%d%%) rate %d.%03d%s\n", sc->sc_dev.dv_xname, (sc->sc_status&4) ? "CRITICAL ":"", (sc->sc_status&1) ? "discharging" : ( (sc->sc_status & 2) ? "charging" : "idle"), ACM_SCALE(sc->sc_mv), ACM_SCALE(sc->sc_capacity), ACM_CAPUNIT(sc), (sc->sc_design_capacity == 0) ? 0 : (sc->sc_capacity * 100) / sc->sc_design_capacity, ACM_SCALE(sc->sc_rate), ACM_RATEUNIT(sc)); } } /* * acpibat_notify_handler: * * Callback from ACPI interrupt handler to notify us of an event. */ void acpibat_notify_handler(ACPI_HANDLE handle, UINT32 notify, void *context) { struct acpibat_softc *sc = context; int rv; switch (notify) { case ACPI_NOTIFY_BusCheck: case ACPI_NOTIFY_BatteryStatusChanged: case ACPI_NOTIFY_BatteryInformationChanged: #ifdef ACPI_BAT_DEBUG printf("%s: received notify message: 0x%x\n", sc->sc_dev.dv_xname, notify); #endif rv = AcpiOsQueueForExecution(OSD_PRIORITY_LO, acpibat_get_status, sc); if (rv != AE_OK) printf("%s: unable to queue status check: %d\n", sc->sc_dev.dv_xname, rv); break; default: printf("%s: received unknown notify message: 0x%x\n", sc->sc_dev.dv_xname, notify); } }