325 lines
8.7 KiB
C
325 lines
8.7 KiB
C
/* $NetBSD: smartbat.c,v 1.8 2011/07/26 08:36:02 macallan Exp $ */
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/*-
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* Copyright (c) 2007 Michael Lorenz
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* 2008 Magnus Henoch
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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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*
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* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
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* ``AS IS'' AND 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 THE FOUNDATION OR CONTRIBUTORS
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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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#include <sys/cdefs.h>
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__KERNEL_RCSID(0, "$NetBSD: smartbat.c,v 1.8 2011/07/26 08:36:02 macallan 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/device.h>
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#include <sys/proc.h>
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#include <dev/sysmon/sysmonvar.h>
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#include <dev/sysmon/sysmon_taskq.h>
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#include <macppc/dev/pmuvar.h>
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#include <macppc/dev/batteryvar.h>
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#include <sys/bus.h>
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#include "opt_battery.h"
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#ifdef SMARTBAT_DEBUG
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#define DPRINTF printf
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#else
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#define DPRINTF while (0) printf
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#endif
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#define BAT_AC_PRESENT 0
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#define BAT_PRESENT 1
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#define BAT_VOLTAGE 2
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#define BAT_CURRENT 3
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#define BAT_MAX_CHARGE 4
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#define BAT_CHARGE 5
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#define BAT_CHARGING 6
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#define BAT_FULL 7
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#define BAT_NSENSORS 8 /* number of sensors */
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struct smartbat_softc {
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device_t sc_dev;
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struct pmu_ops *sc_pmu_ops;
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int sc_num;
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/* envsys stuff */
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struct sysmon_envsys *sc_sme;
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envsys_data_t sc_sensor[BAT_NSENSORS];
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struct sysmon_pswitch sc_sm_acpower;
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/* battery status */
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int sc_flags;
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int sc_oflags;
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int sc_voltage;
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int sc_charge;
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int sc_max_charge;
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int sc_draw;
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int sc_time;
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uint32_t sc_timestamp;
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};
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static void smartbat_attach(device_t, device_t, void *);
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static int smartbat_match(device_t, cfdata_t, void *);
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static void smartbat_setup_envsys(struct smartbat_softc *);
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static void smartbat_refresh(struct sysmon_envsys *, envsys_data_t *);
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static void smartbat_poll(void *);
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static int smartbat_update(struct smartbat_softc *, int);
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CFATTACH_DECL_NEW(smartbat, sizeof(struct smartbat_softc),
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smartbat_match, smartbat_attach, NULL, NULL);
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static int
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smartbat_match(device_t parent, cfdata_t cf, void *aux)
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{
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struct battery_attach_args *baa = aux;
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if (baa->baa_type == BATTERY_TYPE_SMART)
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return 1;
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return 0;
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}
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static void
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smartbat_attach(device_t parent, device_t self, void *aux)
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{
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struct battery_attach_args *baa = aux;
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struct smartbat_softc *sc = device_private(self);
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sc->sc_dev = self;
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sc->sc_pmu_ops = baa->baa_pmu_ops;
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sc->sc_num = baa->baa_num;
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printf(" addr %d: smart battery\n", sc->sc_num);
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smartbat_update(sc, 1);
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/* trigger a status update */
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sc->sc_oflags = ~sc->sc_flags;
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smartbat_setup_envsys(sc);
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sc->sc_pmu_ops->register_callback(sc->sc_pmu_ops->cookie, smartbat_poll,
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sc);
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memset(&sc->sc_sm_acpower, 0, sizeof(struct sysmon_pswitch));
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sc->sc_sm_acpower.smpsw_name = "AC Power";
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sc->sc_sm_acpower.smpsw_type = PSWITCH_TYPE_ACADAPTER;
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if (sysmon_pswitch_register(&sc->sc_sm_acpower) != 0)
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printf("%s: unable to register AC power status with sysmon\n",
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device_xname(sc->sc_dev));
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}
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#define INITDATA(index, unit, string) \
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sc->sc_sensor[index].units = unit; \
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sc->sc_sensor[index].state = ENVSYS_SINVALID; \
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snprintf(sc->sc_sensor[index].desc, \
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sizeof(sc->sc_sensor[index].desc), "%s", string);
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static void
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smartbat_setup_envsys(struct smartbat_softc *sc)
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{
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int i;
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sc->sc_sme = sysmon_envsys_create();
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INITDATA(BAT_AC_PRESENT, ENVSYS_INDICATOR, "AC present");
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INITDATA(BAT_PRESENT, ENVSYS_INDICATOR, "Battery present");
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INITDATA(BAT_VOLTAGE, ENVSYS_SVOLTS_DC, "Battery voltage");
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INITDATA(BAT_CURRENT, ENVSYS_SAMPS, "Battery current");
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INITDATA(BAT_MAX_CHARGE, ENVSYS_SAMPHOUR, "Battery design cap");
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INITDATA(BAT_CHARGE, ENVSYS_SAMPHOUR, "Battery charge");
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INITDATA(BAT_CHARGING, ENVSYS_BATTERY_CHARGE, "Battery charging");
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INITDATA(BAT_FULL, ENVSYS_INDICATOR, "Battery full");
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#undef INITDATA
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for (i = 0; i < BAT_NSENSORS; i++) {
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if (sysmon_envsys_sensor_attach(sc->sc_sme,
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&sc->sc_sensor[i])) {
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sysmon_envsys_destroy(sc->sc_sme);
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return;
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}
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}
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sc->sc_sme->sme_name = device_xname(sc->sc_dev);
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sc->sc_sme->sme_cookie = sc;
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sc->sc_sme->sme_refresh = smartbat_refresh;
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if (sysmon_envsys_register(sc->sc_sme)) {
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aprint_error("%s: unable to register with sysmon\n",
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device_xname(sc->sc_dev));
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sysmon_envsys_destroy(sc->sc_sme);
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}
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}
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static void
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smartbat_refresh(struct sysmon_envsys *sme, envsys_data_t *edata)
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{
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struct smartbat_softc *sc = sme->sme_cookie;
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int which = edata->sensor, present;
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smartbat_update(sc, 0);
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present = (sc->sc_flags & PMU_PWR_BATT_PRESENT) != 0;
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if (present) {
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switch (which) {
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case BAT_AC_PRESENT:
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edata->value_cur = (sc->sc_flags & PMU_PWR_AC_PRESENT);
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break;
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case BAT_PRESENT:
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edata->value_cur = present;
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break;
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case BAT_VOLTAGE:
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edata->value_cur = sc->sc_voltage * 1000;
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break;
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case BAT_CURRENT:
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edata->value_cur = sc->sc_draw * 1000;
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break;
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case BAT_MAX_CHARGE:
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edata->value_cur = sc->sc_max_charge * 1000;
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break;
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case BAT_CHARGE:
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edata->value_cur = sc->sc_charge * 1000;
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break;
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case BAT_CHARGING:
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if ((sc->sc_flags & PMU_PWR_BATT_CHARGING) &&
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(sc->sc_flags & PMU_PWR_AC_PRESENT))
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edata->value_cur = 1;
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else
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edata->value_cur = 0;
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break;
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case BAT_FULL:
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edata->value_cur = (sc->sc_flags & PMU_PWR_BATT_FULL);
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break;
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}
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edata->state = ENVSYS_SVALID;
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} else {
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/* battery isn't there */
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switch (which) {
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case BAT_AC_PRESENT:
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edata->value_cur = (sc->sc_flags & PMU_PWR_AC_PRESENT);
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edata->state = ENVSYS_SVALID;
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break;
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case BAT_PRESENT:
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edata->value_cur = present;
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edata->state = ENVSYS_SVALID;
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break;
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default:
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edata->state = ENVSYS_SINVALID;
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edata->value_cur = 0;
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}
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}
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}
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/*
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* Thanks to Paul Mackerras and Fabio Riccardi's Linux implementation
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* for a clear description of the PMU results.
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*/
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static int
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smartbat_update(struct smartbat_softc *sc, int out)
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{
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int len;
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uint8_t buf[16];
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uint8_t battery_number;
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if (sc->sc_timestamp == time_second)
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return 0;
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sc->sc_timestamp = time_second;
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/* sc_num starts from 0, but we need to start from 1 */
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battery_number = sc->sc_num + 1;
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len = sc->sc_pmu_ops->do_command(sc->sc_pmu_ops->cookie,
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PMU_SMART_BATTERY_STATE,
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1, &battery_number,
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16, buf);
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if (len < 0) {
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DPRINTF("%s: couldn't get battery data\n", device_xname(sc->sc_dev));
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/* XXX: the return value is never checked */
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return -1;
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}
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/* Now, buf[0] is the command number, which we already know.
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That's why all indexes are off by one compared to
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pm_battery_info_smart in pm_direct.c.
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*/
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sc->sc_flags = buf[2];
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/* XXX: are these all valid for smart batteries? */
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if (out) {
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printf(" flags: %x", buf[2]);
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if (buf[2] & PMU_PWR_AC_PRESENT)
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printf(" AC");
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if (buf[2] & PMU_PWR_BATT_CHARGING)
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printf(" charging");
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if (buf[2] & PMU_PWR_BATT_PRESENT)
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printf(" present");
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if (buf[2] & PMU_PWR_BATT_FULL)
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printf(" full");
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printf("\n");
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}
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switch(buf[1]) {
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case 3:
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case 4:
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sc->sc_charge = buf[3];
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sc->sc_max_charge = buf[4];
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sc->sc_draw = *((signed char *)&buf[5]);
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sc->sc_voltage = buf[6];
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break;
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case 5:
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sc->sc_charge = ((buf[3] << 8) | (buf[4]));
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sc->sc_max_charge = ((buf[5] << 8) | (buf[6]));
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sc->sc_draw = *((signed short *)&buf[7]);
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sc->sc_voltage = ((buf[9] << 8) | (buf[8]));
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break;
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default:
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/* XXX - Error condition */
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DPRINTF("%s: why is buf[1] %x?\n", device_xname(sc->sc_dev), buf[1]);
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sc->sc_charge = 0;
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sc->sc_max_charge = 0;
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sc->sc_draw = 0;
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sc->sc_voltage = 0;
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break;
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}
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return 1;
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}
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static void
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smartbat_poll(void *cookie)
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{
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struct smartbat_softc *sc = cookie;
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smartbat_update(sc, 0);
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if ((sc->sc_flags & PMU_PWR_AC_PRESENT) == sc->sc_oflags)
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return;
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sc->sc_oflags = sc->sc_flags & PMU_PWR_AC_PRESENT;
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sysmon_pswitch_event(&sc->sc_sm_acpower,
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sc->sc_oflags ? PSWITCH_EVENT_PRESSED :
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PSWITCH_EVENT_RELEASED);
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}
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