/*- * Copyright (c) 2000 Munehiro Matsuda * Copyright (c) 2000 Takanori Watanabe * Copyright (c) 2000 Mitsuru IWASAKI * 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. * * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``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 OR CONTRIBUTORS 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. * * $FreeBSD$ */ #include "opt_acpi.h" #include #include #include #include #include #include #include #include #include "acpi.h" #include #include MALLOC_DEFINE(M_ACPICMBAT, "acpicmbat", "ACPI control method battery data"); /* Number of times to retry initialization before giving up. */ #define ACPI_CMBAT_RETRY_MAX 6 /* Check the battery once a minute. */ #define CMBAT_POLLRATE (60 * hz) /* Hooks for the ACPI CA debugging infrastructure */ #define _COMPONENT ACPI_BATTERY ACPI_MODULE_NAME("BATTERY") #define ACPI_BATTERY_BST_CHANGE 0x80 #define ACPI_BATTERY_BIF_CHANGE 0x81 struct acpi_cmbat_softc { device_t dev; struct acpi_bif bif; struct acpi_bst bst; struct timespec bif_lastupdated; struct timespec bst_lastupdated; int bif_updating; int bst_updating; int present; int cap; int min; int full_charge_time; int initializing; }; static struct timespec acpi_cmbat_info_lastupdated; /* XXX: devclass_get_maxunit() don't give us the current allocated units. */ static int acpi_cmbat_units = 0; static int acpi_cmbat_info_expired(struct timespec *); static void acpi_cmbat_info_updated(struct timespec *); static void acpi_cmbat_get_bst(void *); static void acpi_cmbat_get_bif(void *); static void acpi_cmbat_notify_handler(ACPI_HANDLE, UINT32, void *); static int acpi_cmbat_probe(device_t); static int acpi_cmbat_attach(device_t); static int acpi_cmbat_resume(device_t); static int acpi_cmbat_ioctl(u_long, caddr_t, void *); static int acpi_cmbat_is_bst_valid(struct acpi_bst*); static int acpi_cmbat_is_bif_valid(struct acpi_bif*); static int acpi_cmbat_get_total_battinfo(struct acpi_battinfo *); static void acpi_cmbat_init_battery(void *); static device_method_t acpi_cmbat_methods[] = { /* Device interface */ DEVMETHOD(device_probe, acpi_cmbat_probe), DEVMETHOD(device_attach, acpi_cmbat_attach), DEVMETHOD(device_resume, acpi_cmbat_resume), {0, 0} }; static driver_t acpi_cmbat_driver = { "acpi_cmbat", acpi_cmbat_methods, sizeof(struct acpi_cmbat_softc), }; static devclass_t acpi_cmbat_devclass; DRIVER_MODULE(acpi_cmbat, acpi, acpi_cmbat_driver, acpi_cmbat_devclass, 0, 0); MODULE_DEPEND(acpi_cmbat, acpi, 1, 1, 1); static int acpi_cmbat_info_expired(struct timespec *lastupdated) { struct timespec curtime; if (lastupdated == NULL) return (1); if (!timespecisset(lastupdated)) return (1); getnanotime(&curtime); timespecsub(&curtime, lastupdated); return (curtime.tv_sec < 0 || curtime.tv_sec > acpi_battery_get_info_expire()); } static void acpi_cmbat_info_updated(struct timespec *lastupdated) { if (lastupdated != NULL) getnanotime(lastupdated); } static void acpi_cmbat_get_bst(void *context) { device_t dev; struct acpi_cmbat_softc *sc; ACPI_STATUS as; ACPI_OBJECT *res; ACPI_HANDLE h; ACPI_BUFFER bst_buffer; dev = context; sc = device_get_softc(dev); h = acpi_get_handle(dev); if (!acpi_cmbat_info_expired(&sc->bst_lastupdated)) return; if (sc->bst_updating) return; sc->bst_updating = 1; bst_buffer.Pointer = NULL; bst_buffer.Length = ACPI_ALLOCATE_BUFFER; as = AcpiEvaluateObject(h, "_BST", NULL, &bst_buffer); if (ACPI_FAILURE(as)) { ACPI_VPRINT(dev, acpi_device_get_parent_softc(dev), "error fetching current battery status -- %s\n", AcpiFormatException(as)); goto end; } res = (ACPI_OBJECT *)bst_buffer.Pointer; if (!ACPI_PKG_VALID(res, 4)) { ACPI_VPRINT(dev, acpi_device_get_parent_softc(dev), "battery status corrupted\n"); goto end; } if (acpi_PkgInt32(res, 0, &sc->bst.state) != 0) goto end; if (acpi_PkgInt32(res, 1, &sc->bst.rate) != 0) goto end; if (acpi_PkgInt32(res, 2, &sc->bst.cap) != 0) goto end; if (acpi_PkgInt32(res, 3, &sc->bst.volt) != 0) goto end; acpi_cmbat_info_updated(&sc->bst_lastupdated); end: if (bst_buffer.Pointer != NULL) AcpiOsFree(bst_buffer.Pointer); sc->bst_updating = 0; } static void acpi_cmbat_get_bif(void *context) { device_t dev; struct acpi_cmbat_softc *sc; ACPI_STATUS as; ACPI_OBJECT *res; ACPI_HANDLE h; ACPI_BUFFER bif_buffer; dev = context; sc = device_get_softc(dev); h = acpi_get_handle(dev); if (!acpi_cmbat_info_expired(&sc->bif_lastupdated)) return; if (sc->bif_updating) return; sc->bif_updating = 1; bif_buffer.Pointer = NULL; bif_buffer.Length = ACPI_ALLOCATE_BUFFER; as = AcpiEvaluateObject(h, "_BIF", NULL, &bif_buffer); if (ACPI_FAILURE(as)) { ACPI_VPRINT(dev, acpi_device_get_parent_softc(dev), "error fetching current battery info -- %s\n", AcpiFormatException(as)); goto end; } res = (ACPI_OBJECT *)bif_buffer.Pointer; if (!ACPI_PKG_VALID(res, 13)) { ACPI_VPRINT(dev, acpi_device_get_parent_softc(dev), "battery info corrupted\n"); goto end; } if (acpi_PkgInt32(res, 0, &sc->bif.units) != 0) goto end; if (acpi_PkgInt32(res, 1, &sc->bif.dcap) != 0) goto end; if (acpi_PkgInt32(res, 2, &sc->bif.lfcap) != 0) goto end; if (acpi_PkgInt32(res, 3, &sc->bif.btech) != 0) goto end; if (acpi_PkgInt32(res, 4, &sc->bif.dvol) != 0) goto end; if (acpi_PkgInt32(res, 5, &sc->bif.wcap) != 0) goto end; if (acpi_PkgInt32(res, 6, &sc->bif.lcap) != 0) goto end; if (acpi_PkgInt32(res, 7, &sc->bif.gra1) != 0) goto end; if (acpi_PkgInt32(res, 8, &sc->bif.gra2) != 0) goto end; if (acpi_PkgStr(res, 9, sc->bif.model, ACPI_CMBAT_MAXSTRLEN) != 0) goto end; if (acpi_PkgStr(res, 10, sc->bif.serial, ACPI_CMBAT_MAXSTRLEN) != 0) goto end; if (acpi_PkgStr(res, 11, sc->bif.type, ACPI_CMBAT_MAXSTRLEN) != 0) goto end; if (acpi_PkgStr(res, 12, sc->bif.oeminfo, ACPI_CMBAT_MAXSTRLEN) != 0) goto end; acpi_cmbat_info_updated(&sc->bif_lastupdated); end: if (bif_buffer.Pointer != NULL) AcpiOsFree(bif_buffer.Pointer); sc->bif_updating = 0; } static void acpi_cmbat_notify_handler(ACPI_HANDLE h, UINT32 notify, void *context) { device_t dev; struct acpi_cmbat_softc *sc; dev = (device_t)context; if ((sc = device_get_softc(dev)) == NULL) return; acpi_UserNotify("CMBAT", h, notify); switch (notify) { case ACPI_NOTIFY_DEVICE_CHECK: case ACPI_BATTERY_BST_CHANGE: timespecclear(&sc->bst_lastupdated); break; case ACPI_NOTIFY_BUS_CHECK: case ACPI_BATTERY_BIF_CHANGE: timespecclear(&sc->bif_lastupdated); AcpiOsQueueForExecution(OSD_PRIORITY_LO, acpi_cmbat_get_bif, dev); break; default: break; } } static int acpi_cmbat_probe(device_t dev) { static char *cmbat_ids[] = { "PNP0C0A", NULL }; if (acpi_disabled("cmbat") || ACPI_ID_PROBE(device_get_parent(dev), dev, cmbat_ids) == NULL) return (ENXIO); device_set_desc(dev, "Control Method Battery"); return (0); } static int acpi_cmbat_attach(device_t dev) { int error; ACPI_HANDLE handle; struct acpi_cmbat_softc *sc; if ((sc = device_get_softc(dev)) == NULL) return (ENXIO); handle = acpi_get_handle(dev); /* * Install a system notify handler in addition to the device notify. * Toshiba notebook uses this alternate notify for its battery. */ AcpiInstallNotifyHandler(handle, ACPI_SYSTEM_NOTIFY, acpi_cmbat_notify_handler, dev); AcpiInstallNotifyHandler(handle, ACPI_DEVICE_NOTIFY, acpi_cmbat_notify_handler, dev); sc->bif_updating = sc->bst_updating = 0; sc->dev = dev; timespecclear(&sc->bif_lastupdated); timespecclear(&sc->bst_lastupdated); if (acpi_cmbat_units == 0) { error = acpi_register_ioctl(ACPIIO_CMBAT_GET_BIF, acpi_cmbat_ioctl, NULL); if (error != 0) return (error); error = acpi_register_ioctl(ACPIIO_CMBAT_GET_BST, acpi_cmbat_ioctl, NULL); if (error != 0) return (error); } error = acpi_battery_register(ACPI_BATT_TYPE_CMBAT, acpi_cmbat_units); if (error != 0) return (error); acpi_cmbat_units++; timespecclear(&acpi_cmbat_info_lastupdated); sc->initializing = 0; AcpiOsQueueForExecution(OSD_PRIORITY_LO, acpi_cmbat_init_battery, dev); return (0); } static int acpi_cmbat_resume(device_t dev) { AcpiOsQueueForExecution(OSD_PRIORITY_LO, acpi_cmbat_init_battery, dev); return (0); } static int acpi_cmbat_ioctl(u_long cmd, caddr_t addr, void *arg) { device_t dev; union acpi_battery_ioctl_arg *ioctl_arg; struct acpi_cmbat_softc *sc; struct acpi_bif *bifp; struct acpi_bst *bstp; ioctl_arg = (union acpi_battery_ioctl_arg *)addr; dev = devclass_get_device(acpi_cmbat_devclass, ioctl_arg->unit); if (dev == NULL) return (ENXIO); sc = device_get_softc(dev); if (sc == NULL) return (ENXIO); /* * No security check required: information retrieval only. If * new functions are added here, a check might be required. */ switch (cmd) { case ACPIIO_CMBAT_GET_BIF: acpi_cmbat_get_bif(dev); bifp = &ioctl_arg->bif; bifp->units = sc->bif.units; bifp->dcap = sc->bif.dcap; bifp->lfcap = sc->bif.lfcap; bifp->btech = sc->bif.btech; bifp->dvol = sc->bif.dvol; bifp->wcap = sc->bif.wcap; bifp->lcap = sc->bif.lcap; bifp->gra1 = sc->bif.gra1; bifp->gra2 = sc->bif.gra2; strncpy(bifp->model, sc->bif.model, sizeof(sc->bif.model)); strncpy(bifp->serial, sc->bif.serial, sizeof(sc->bif.serial)); strncpy(bifp->type, sc->bif.type, sizeof(sc->bif.type)); strncpy(bifp->oeminfo, sc->bif.oeminfo, sizeof(sc->bif.oeminfo)); break; case ACPIIO_CMBAT_GET_BST: bstp = &ioctl_arg->bst; if (acpi_BatteryIsPresent(dev)) { acpi_cmbat_get_bst(dev); bstp->state = sc->bst.state; bstp->rate = sc->bst.rate; bstp->cap = sc->bst.cap; bstp->volt = sc->bst.volt; } else { bstp->state = ACPI_BATT_STAT_NOT_PRESENT; } break; default: break; } return (0); } static int acpi_cmbat_is_bst_valid(struct acpi_bst *bst) { if (bst->state >= ACPI_BATT_STAT_MAX || bst->cap == 0xffffffff || bst->volt == 0xffffffff) return (0); else return (1); } static int acpi_cmbat_is_bif_valid(struct acpi_bif *bif) { if (bif->lfcap == 0) return (0); else return (1); } static int acpi_cmbat_get_total_battinfo(struct acpi_battinfo *battinfo) { int i; int error; int batt_stat; int valid_rate, valid_units; int cap, min; int total_cap, total_min, total_full; device_t dev; struct acpi_cmbat_softc *sc; static int bat_units = 0; static struct acpi_cmbat_softc **bat = NULL; cap = min = -1; batt_stat = ACPI_BATT_STAT_NOT_PRESENT; error = 0; /* Allocate array of softc pointers */ if (bat_units != acpi_cmbat_units) { if (bat != NULL) { free(bat, M_ACPICMBAT); bat = NULL; } bat_units = 0; } if (bat == NULL) { bat_units = acpi_cmbat_units; bat = malloc(sizeof(struct acpi_cmbat_softc *) * bat_units, M_ACPICMBAT, M_NOWAIT); if (bat == NULL) { error = ENOMEM; goto out; } /* Collect softc pointers */ for (i = 0; i < acpi_cmbat_units; i++) { if ((dev = devclass_get_device(acpi_cmbat_devclass, i)) == NULL) { error = ENXIO; goto out; } if ((sc = device_get_softc(dev)) == NULL) { error = ENXIO; goto out; } bat[i] = sc; } } /* Get battery status, valid rate and valid units */ batt_stat = valid_rate = valid_units = 0; for (i = 0; i < acpi_cmbat_units; i++) { bat[i]->present = acpi_BatteryIsPresent(bat[i]->dev); if (!bat[i]->present) continue; acpi_cmbat_get_bst(bat[i]->dev); /* If battery not installed, we get strange values */ if (!acpi_cmbat_is_bst_valid(&(bat[i]->bst)) || !acpi_cmbat_is_bif_valid(&(bat[i]->bif))) { bat[i]->present = 0; continue; } valid_units++; bat[i]->cap = 100 * bat[i]->bst.cap / bat[i]->bif.lfcap; batt_stat |= bat[i]->bst.state; if (bat[i]->bst.rate > 0) { /* * XXX Hack to calculate total battery time. * Systems with 2 or more battries, they may get used * one by one, thus bst.rate is set only to the one * in use. For remaining batteries bst.rate = 0, which * makes it impossible to calculate remaining time. * Some other systems may need sum of bst.rate in * dis-charging state. * There for we sum up the bst.rate that is valid * (in dis-charging state), and use the sum to * calcutate remaining batteries' time. */ if (bat[i]->bst.state & ACPI_BATT_STAT_DISCHARG) valid_rate += bat[i]->bst.rate; } } /* Calculate total battery capacity and time */ total_cap = total_min = total_full = 0; for (i = 0; i < acpi_cmbat_units; i++) { if (!bat[i]->present) continue; if (valid_rate > 0) { /* Use the sum of bst.rate */ bat[i]->min = 60 * bat[i]->bst.cap / valid_rate; } else if (bat[i]->full_charge_time > 0) { bat[i]->min = (bat[i]->full_charge_time * bat[i]->cap) / 100; } else { /* Couldn't find valid rate and full battery time */ bat[i]->min = 0; } total_min += bat[i]->min; total_cap += bat[i]->cap; total_full += bat[i]->full_charge_time; } /* Battery life */ if (valid_units == 0) { cap = -1; batt_stat = ACPI_BATT_STAT_NOT_PRESENT; } else { cap = total_cap / valid_units; } /* Battery time */ if (valid_units == 0) { min = -1; } else if (valid_rate == 0 || (batt_stat & ACPI_BATT_STAT_CHARGING)) { if (total_full == 0) min = -1; else min = (total_full * cap) / 100; } else { min = total_min; } acpi_cmbat_info_updated(&acpi_cmbat_info_lastupdated); out: battinfo->cap = cap; battinfo->min = min; battinfo->state = batt_stat; return (error); } static void acpi_cmbat_init_battery(void *arg) { int retry; device_t dev = (device_t)arg; struct acpi_cmbat_softc *sc = device_get_softc(dev); if (sc->initializing) return; sc->initializing = 1; ACPI_VPRINT(dev, acpi_device_get_parent_softc(dev), "battery initialization start\n"); for (retry = 0; retry < ACPI_CMBAT_RETRY_MAX; retry++, AcpiOsSleep(10, 0)) { sc->present = acpi_BatteryIsPresent(dev); if (!sc->present) continue; timespecclear(&sc->bst_lastupdated); timespecclear(&sc->bif_lastupdated); acpi_cmbat_get_bst(dev); if (!acpi_cmbat_is_bst_valid(&sc->bst)) continue; acpi_cmbat_get_bif(dev); if (!acpi_cmbat_is_bif_valid(&sc->bif)) continue; break; } sc->initializing = 0; if (retry == ACPI_CMBAT_RETRY_MAX) { ACPI_VPRINT(dev, acpi_device_get_parent_softc(dev), "battery initialization failed, giving up\n"); } else { ACPI_VPRINT(dev, acpi_device_get_parent_softc(dev), "battery initialization done, tried %d times\n", retry + 1); } } /* * Public interfaces. */ int acpi_cmbat_get_battinfo(int unit, struct acpi_battinfo *battinfo) { int error; device_t dev; struct acpi_cmbat_softc *sc; if (unit == -1) return (acpi_cmbat_get_total_battinfo(battinfo)); if (acpi_cmbat_info_expired(&acpi_cmbat_info_lastupdated)) { error = acpi_cmbat_get_total_battinfo(battinfo); if (error) goto out; } error = 0; if (unit >= acpi_cmbat_units) { error = ENXIO; goto out; } if ((dev = devclass_get_device(acpi_cmbat_devclass, unit)) == NULL) { error = ENXIO; goto out; } if ((sc = device_get_softc(dev)) == NULL) { error = ENXIO; goto out; } if (!sc->present) { battinfo->cap = -1; battinfo->min = -1; battinfo->state = ACPI_BATT_STAT_NOT_PRESENT; } else { battinfo->cap = sc->cap; battinfo->min = sc->min; battinfo->state = sc->bst.state; } out: return (error); }