File:  [DragonFly] / src / sys / dev / acpica5 / acpi_cmbat.c
Revision 1.2: download - view: text, annotated - select for diffs
Wed May 5 22:19:24 2004 UTC (10 years, 2 months ago) by dillon
Branches: MAIN
CVS tags: HEAD
Use M_INTWAIT instead of M_NOWAIT for the rest of the acpica support code.
Also remove (now unneeded) NULL checks.

    1: /*-
    2:  * Copyright (c) 2000 Munehiro Matsuda
    3:  * Copyright (c) 2000 Takanori Watanabe
    4:  * Copyright (c) 2000 Mitsuru IWASAKI <iwasaki@FreeBSD.org>
    5:  * All rights reserved.
    6:  *
    7:  * Redistribution and use in source and binary forms, with or without
    8:  * modification, are permitted provided that the following conditions
    9:  * are met:
   10:  * 1. Redistributions of source code must retain the above copyright
   11:  *    notice, this list of conditions and the following disclaimer.
   12:  * 2. Redistributions in binary form must reproduce the above copyright
   13:  *    notice, this list of conditions and the following disclaimer in the
   14:  *    documentation and/or other materials provided with the distribution.
   15:  *
   16:  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
   17:  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   18:  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   19:  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
   20:  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   21:  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   22:  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   23:  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   24:  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   25:  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   26:  * SUCH DAMAGE.
   27:  *
   28:  * $FreeBSD: src/sys/dev/acpica/acpi_cmbat.c,v 1.27 2003/12/23 18:27:35 njl Exp $
   29:  * $DragonFly: src/sys/dev/acpica5/acpi_cmbat.c,v 1.2 2004/05/05 22:19:24 dillon Exp $
   30:  */
   31: 
   32: #include "opt_acpi.h"
   33: #include <sys/param.h>
   34: #include <sys/kernel.h>
   35: #include <sys/bus.h>
   36: #include <sys/ioccom.h>
   37: 
   38: #include <machine/bus.h>
   39: #include <sys/rman.h>
   40: #include <sys/malloc.h>
   41: 
   42: #include "acpi.h"
   43: #include <dev/acpica5/acpivar.h>
   44: #include <dev/acpica5/acpiio.h>
   45: 
   46: MALLOC_DEFINE(M_ACPICMBAT, "acpicmbat", "ACPI control method battery data");
   47: 
   48: /* Number of times to retry initialization before giving up. */
   49: #define ACPI_CMBAT_RETRY_MAX	6
   50: 
   51: /* Check the battery once a minute. */
   52: #define	CMBAT_POLLRATE	(60 * hz)
   53: 
   54: /* Hooks for the ACPI CA debugging infrastructure */
   55: #define	_COMPONENT	ACPI_BATTERY
   56: ACPI_MODULE_NAME("BATTERY")
   57: 
   58: #define	ACPI_BATTERY_BST_CHANGE 0x80
   59: #define	ACPI_BATTERY_BIF_CHANGE 0x81
   60: 
   61: struct acpi_cmbat_softc {
   62:     device_t	    dev;
   63: 
   64:     struct acpi_bif bif;
   65:     struct acpi_bst bst;
   66:     struct timespec bif_lastupdated;
   67:     struct timespec bst_lastupdated;
   68:     int		    bif_updating;
   69:     int		    bst_updating;
   70: 
   71:     int		    present;
   72:     int		    cap;
   73:     int		    min;
   74:     int		    full_charge_time;
   75:     int		    initializing;
   76: };
   77: 
   78: static struct timespec	acpi_cmbat_info_lastupdated;
   79: 
   80: /* XXX: devclass_get_maxunit() don't give us the current allocated units. */
   81: static int		acpi_cmbat_units = 0;
   82: 
   83: static int		acpi_cmbat_info_expired(struct timespec *);
   84: static void		acpi_cmbat_info_updated(struct timespec *);
   85: static void		acpi_cmbat_get_bst(void *);
   86: static void		acpi_cmbat_get_bif(void *);
   87: static void		acpi_cmbat_notify_handler(ACPI_HANDLE, UINT32, void *);
   88: static int		acpi_cmbat_probe(device_t);
   89: static int		acpi_cmbat_attach(device_t);
   90: static int		acpi_cmbat_resume(device_t);
   91: static int		acpi_cmbat_ioctl(u_long, caddr_t, void *);
   92: static int		acpi_cmbat_is_bst_valid(struct acpi_bst*);
   93: static int		acpi_cmbat_is_bif_valid(struct acpi_bif*);
   94: static int		acpi_cmbat_get_total_battinfo(struct acpi_battinfo *);
   95: static void		acpi_cmbat_init_battery(void *);
   96: 
   97: static device_method_t acpi_cmbat_methods[] = {
   98:     /* Device interface */
   99:     DEVMETHOD(device_probe,	acpi_cmbat_probe),
  100:     DEVMETHOD(device_attach,	acpi_cmbat_attach),
  101:     DEVMETHOD(device_resume,	acpi_cmbat_resume),
  102: 
  103:     {0, 0}
  104: };
  105: 
  106: static driver_t acpi_cmbat_driver = {
  107:     "acpi_cmbat",
  108:     acpi_cmbat_methods,
  109:     sizeof(struct acpi_cmbat_softc),
  110: };
  111: 
  112: static devclass_t acpi_cmbat_devclass;
  113: DRIVER_MODULE(acpi_cmbat, acpi, acpi_cmbat_driver, acpi_cmbat_devclass, 0, 0);
  114: 
  115: static int
  116: acpi_cmbat_info_expired(struct timespec *lastupdated)
  117: {
  118:     struct timespec	curtime;
  119: 
  120:     if (lastupdated == NULL)
  121: 	return (1);
  122:     if (!timespecisset(lastupdated))
  123: 	return (1);
  124: 
  125:     getnanotime(&curtime);
  126:     timespecsub(&curtime, lastupdated);
  127:     return (curtime.tv_sec < 0 ||
  128: 	    curtime.tv_sec > acpi_battery_get_info_expire());
  129: }
  130: 
  131: 
  132: static void
  133: acpi_cmbat_info_updated(struct timespec *lastupdated)
  134: {
  135:     if (lastupdated != NULL)
  136: 	getnanotime(lastupdated);
  137: }
  138: 
  139: static void
  140: acpi_cmbat_get_bst(void *context)
  141: {
  142:     device_t	dev;
  143:     struct acpi_cmbat_softc *sc;
  144:     ACPI_STATUS	as;
  145:     ACPI_OBJECT	*res;
  146:     ACPI_HANDLE	h;
  147:     ACPI_BUFFER	bst_buffer;
  148: 
  149:     dev = context;
  150:     sc = device_get_softc(dev);
  151:     h = acpi_get_handle(dev);
  152: 
  153:     if (!acpi_cmbat_info_expired(&sc->bst_lastupdated))
  154: 	return;
  155:     if (sc->bst_updating)
  156: 	return;
  157:     sc->bst_updating = 1;
  158: 
  159:     bst_buffer.Pointer = NULL;
  160:     bst_buffer.Length = ACPI_ALLOCATE_BUFFER;
  161:     as = AcpiEvaluateObject(h, "_BST", NULL, &bst_buffer);
  162:     if (ACPI_FAILURE(as)) {
  163: 	ACPI_VPRINT(dev, acpi_device_get_parent_softc(dev),
  164: 		    "error fetching current battery status -- %s\n",
  165: 		    AcpiFormatException(as));
  166: 	goto end;
  167:     }
  168: 
  169:     res = (ACPI_OBJECT *)bst_buffer.Pointer;
  170:     if (!ACPI_PKG_VALID(res, 4)) {
  171: 	ACPI_VPRINT(dev, acpi_device_get_parent_softc(dev),
  172: 		    "battery status corrupted\n");
  173: 	goto end;
  174:     }
  175: 
  176:     if (acpi_PkgInt32(res, 0, &sc->bst.state) != 0)
  177: 	goto end;
  178:     if (acpi_PkgInt32(res, 1, &sc->bst.rate) != 0)
  179: 	goto end;
  180:     if (acpi_PkgInt32(res, 2, &sc->bst.cap) != 0)
  181: 	goto end;
  182:     if (acpi_PkgInt32(res, 3, &sc->bst.volt) != 0)
  183: 	goto end;
  184:     acpi_cmbat_info_updated(&sc->bst_lastupdated);
  185: 
  186: end:
  187:     if (bst_buffer.Pointer != NULL)
  188: 	AcpiOsFree(bst_buffer.Pointer);
  189:     sc->bst_updating = 0;
  190: }
  191: 
  192: static void
  193: acpi_cmbat_get_bif(void *context)
  194: {
  195:     device_t	dev;
  196:     struct acpi_cmbat_softc *sc;
  197:     ACPI_STATUS	as;
  198:     ACPI_OBJECT	*res;
  199:     ACPI_HANDLE	h;
  200:     ACPI_BUFFER	bif_buffer;
  201: 
  202:     dev = context;
  203:     sc = device_get_softc(dev);
  204:     h = acpi_get_handle(dev);
  205: 
  206:     if (!acpi_cmbat_info_expired(&sc->bif_lastupdated))
  207: 	return;
  208:     if (sc->bif_updating)
  209: 	return;
  210:     sc->bif_updating = 1;
  211: 
  212:     bif_buffer.Pointer = NULL;
  213:     bif_buffer.Length = ACPI_ALLOCATE_BUFFER;
  214:     as = AcpiEvaluateObject(h, "_BIF", NULL, &bif_buffer);
  215:     if (ACPI_FAILURE(as)) {
  216: 	ACPI_VPRINT(dev, acpi_device_get_parent_softc(dev),
  217: 		    "error fetching current battery info -- %s\n",
  218: 		    AcpiFormatException(as));
  219: 	goto end;
  220:     }
  221: 
  222:     res = (ACPI_OBJECT *)bif_buffer.Pointer;
  223:     if (!ACPI_PKG_VALID(res, 13)) {
  224: 	ACPI_VPRINT(dev, acpi_device_get_parent_softc(dev),
  225: 		    "battery info corrupted\n");
  226: 	goto end;
  227:     }
  228: 
  229:     if (acpi_PkgInt32(res,  0, &sc->bif.units) != 0)
  230: 	goto end;
  231:     if (acpi_PkgInt32(res,  1, &sc->bif.dcap) != 0)
  232: 	goto end;
  233:     if (acpi_PkgInt32(res,  2, &sc->bif.lfcap) != 0)
  234: 	goto end;
  235:     if (acpi_PkgInt32(res,  3, &sc->bif.btech) != 0)
  236: 	goto end;
  237:     if (acpi_PkgInt32(res,  4, &sc->bif.dvol) != 0)
  238: 	goto end;
  239:     if (acpi_PkgInt32(res,  5, &sc->bif.wcap) != 0)
  240: 	goto end;
  241:     if (acpi_PkgInt32(res,  6, &sc->bif.lcap) != 0)
  242: 	goto end;
  243:     if (acpi_PkgInt32(res,  7, &sc->bif.gra1) != 0)
  244: 	goto end;
  245:     if (acpi_PkgInt32(res,  8, &sc->bif.gra2) != 0)
  246: 	goto end;
  247:     if (acpi_PkgStr(res,  9, sc->bif.model, ACPI_CMBAT_MAXSTRLEN) != 0)
  248: 	goto end;
  249:     if (acpi_PkgStr(res, 10, sc->bif.serial, ACPI_CMBAT_MAXSTRLEN) != 0)
  250: 	goto end;
  251:     if (acpi_PkgStr(res, 11, sc->bif.type, ACPI_CMBAT_MAXSTRLEN) != 0)
  252: 	goto end;
  253:     if (acpi_PkgStr(res, 12, sc->bif.oeminfo, ACPI_CMBAT_MAXSTRLEN) != 0)
  254: 	goto end;
  255:     acpi_cmbat_info_updated(&sc->bif_lastupdated);
  256: 
  257: end:
  258:     if (bif_buffer.Pointer != NULL)
  259: 	AcpiOsFree(bif_buffer.Pointer);
  260:     sc->bif_updating = 0;
  261: }
  262: 
  263: static void
  264: acpi_cmbat_notify_handler(ACPI_HANDLE h, UINT32 notify, void *context)
  265: {
  266:     device_t dev;
  267:     struct acpi_cmbat_softc	*sc;
  268: 
  269:     dev = (device_t)context;
  270:     if ((sc = device_get_softc(dev)) == NULL)
  271: 	return;
  272: 
  273:     acpi_UserNotify("CMBAT", h, notify);
  274: 
  275:     switch (notify) {
  276:     case ACPI_NOTIFY_DEVICE_CHECK:
  277:     case ACPI_BATTERY_BST_CHANGE:
  278: 	timespecclear(&sc->bst_lastupdated);
  279: 	break;
  280:     case ACPI_NOTIFY_BUS_CHECK:
  281:     case ACPI_BATTERY_BIF_CHANGE:
  282: 	timespecclear(&sc->bif_lastupdated);
  283: 	AcpiOsQueueForExecution(OSD_PRIORITY_LO, acpi_cmbat_get_bif, dev);
  284: 	break;
  285:     default:
  286: 	break;
  287:     }
  288: }
  289: 
  290: static int
  291: acpi_cmbat_probe(device_t dev)
  292: {
  293:     if (acpi_get_type(dev) == ACPI_TYPE_DEVICE &&
  294: 	!acpi_disabled("cmbat") && acpi_MatchHid(dev, "PNP0C0A")) {
  295: 
  296: 	device_set_desc(dev, "Control Method Battery");
  297: 	return (0);
  298:     }
  299:     return (ENXIO);
  300: }
  301: 
  302: static int
  303: acpi_cmbat_attach(device_t dev)
  304: {
  305:     int		error;
  306:     ACPI_HANDLE	handle;
  307:     struct acpi_cmbat_softc *sc;
  308: 
  309:     if ((sc = device_get_softc(dev)) == NULL)
  310: 	return (ENXIO);
  311: 
  312:     handle = acpi_get_handle(dev);
  313: 
  314:     /*
  315:      * Install a system notify handler in addition to the device notify.
  316:      * Toshiba notebook uses this alternate notify for its battery.
  317:      */
  318:     AcpiInstallNotifyHandler(handle, ACPI_SYSTEM_NOTIFY,
  319: 			     acpi_cmbat_notify_handler, dev);
  320:     AcpiInstallNotifyHandler(handle, ACPI_DEVICE_NOTIFY,
  321: 			     acpi_cmbat_notify_handler, dev);
  322: 
  323:     sc->bif_updating = sc->bst_updating = 0;
  324:     sc->dev = dev;
  325: 
  326:     timespecclear(&sc->bif_lastupdated);
  327:     timespecclear(&sc->bst_lastupdated);
  328: 
  329:     if (acpi_cmbat_units == 0) {
  330: 	error = acpi_register_ioctl(ACPIIO_CMBAT_GET_BIF,
  331: 				    acpi_cmbat_ioctl, NULL);
  332: 	if (error != 0)
  333: 	    return (error);
  334: 	error = acpi_register_ioctl(ACPIIO_CMBAT_GET_BST,
  335: 				    acpi_cmbat_ioctl, NULL);
  336: 	if (error != 0)
  337: 		return (error);
  338:     }
  339: 
  340:     error = acpi_battery_register(ACPI_BATT_TYPE_CMBAT, acpi_cmbat_units);
  341:     if (error != 0)
  342: 	return (error);
  343: 
  344:     acpi_cmbat_units++;
  345:     timespecclear(&acpi_cmbat_info_lastupdated);
  346:     sc->initializing = 0;
  347:     AcpiOsQueueForExecution(OSD_PRIORITY_LO, acpi_cmbat_init_battery, dev);
  348: 
  349:     return (0);
  350: }
  351: 
  352: static int
  353: acpi_cmbat_resume(device_t dev)
  354: {
  355:     AcpiOsQueueForExecution(OSD_PRIORITY_LO, acpi_cmbat_init_battery, dev);
  356:     return (0);
  357: }
  358: 
  359: static int
  360: acpi_cmbat_ioctl(u_long cmd, caddr_t addr, void *arg)
  361: {
  362:     device_t	dev;
  363:     union acpi_battery_ioctl_arg *ioctl_arg;
  364:     struct acpi_cmbat_softc *sc;
  365:     struct acpi_bif	*bifp;
  366:     struct acpi_bst	*bstp;
  367: 
  368:     ioctl_arg = (union acpi_battery_ioctl_arg *)addr;
  369:     dev = devclass_get_device(acpi_cmbat_devclass, ioctl_arg->unit);
  370:     if (dev == NULL)
  371: 	return (ENXIO);
  372:     sc = device_get_softc(dev);
  373:     if (sc == NULL)
  374: 	return (ENXIO);
  375: 
  376:     /*
  377:      * No security check required: information retrieval only.  If
  378:      * new functions are added here, a check might be required.
  379:      */
  380:     switch (cmd) {
  381:     case ACPIIO_CMBAT_GET_BIF:
  382: 	acpi_cmbat_get_bif(dev);
  383: 	bifp = &ioctl_arg->bif;
  384: 	bifp->units = sc->bif.units;
  385: 	bifp->dcap = sc->bif.dcap;
  386: 	bifp->lfcap = sc->bif.lfcap;
  387: 	bifp->btech = sc->bif.btech;
  388: 	bifp->dvol = sc->bif.dvol;
  389: 	bifp->wcap = sc->bif.wcap;
  390: 	bifp->lcap = sc->bif.lcap;
  391: 	bifp->gra1 = sc->bif.gra1;
  392: 	bifp->gra2 = sc->bif.gra2;
  393: 	strncpy(bifp->model, sc->bif.model, sizeof(sc->bif.model));
  394: 	strncpy(bifp->serial, sc->bif.serial, sizeof(sc->bif.serial));
  395: 	strncpy(bifp->type, sc->bif.type, sizeof(sc->bif.type));
  396: 	strncpy(bifp->oeminfo, sc->bif.oeminfo, sizeof(sc->bif.oeminfo));
  397: 	break;
  398:     case ACPIIO_CMBAT_GET_BST:
  399: 	bstp = &ioctl_arg->bst;
  400: 	if (acpi_BatteryIsPresent(dev)) {
  401: 	    acpi_cmbat_get_bst(dev);
  402: 	    bstp->state = sc->bst.state;
  403: 	    bstp->rate = sc->bst.rate;
  404: 	    bstp->cap = sc->bst.cap;
  405: 	    bstp->volt = sc->bst.volt;
  406: 	} else {
  407: 	    bstp->state = ACPI_BATT_STAT_NOT_PRESENT;
  408: 	}
  409: 	break;
  410:     default:
  411: 	break;
  412:     }
  413: 
  414:     return (0);
  415: }
  416: 
  417: static int
  418: acpi_cmbat_is_bst_valid(struct acpi_bst *bst)
  419: {
  420:     if (bst->state >= ACPI_BATT_STAT_MAX || bst->cap == 0xffffffff ||
  421: 	bst->volt == 0xffffffff)
  422: 
  423: 	return (0);
  424:     else
  425: 	return (1);
  426: }
  427: 
  428: static int
  429: acpi_cmbat_is_bif_valid(struct acpi_bif *bif)
  430: {
  431:     if (bif->lfcap == 0)
  432: 	return (0);
  433:     else
  434: 	return (1);
  435: }
  436: 
  437: static int
  438: acpi_cmbat_get_total_battinfo(struct acpi_battinfo *battinfo)
  439: {
  440:     int		i;
  441:     int		error;
  442:     int		batt_stat;
  443:     int		valid_rate, valid_units;
  444:     int		cap, min;
  445:     int		total_cap, total_min, total_full;
  446:     device_t	dev;
  447:     struct acpi_cmbat_softc *sc;
  448:     static int	bat_units = 0;
  449:     static struct acpi_cmbat_softc **bat = NULL;
  450: 
  451:     cap = min = -1;
  452:     batt_stat = ACPI_BATT_STAT_NOT_PRESENT;
  453:     error = 0;
  454: 
  455:     /* Allocate array of softc pointers */
  456:     if (bat_units != acpi_cmbat_units) {
  457: 	if (bat != NULL) {
  458: 	    free(bat, M_ACPICMBAT);
  459: 	    bat = NULL;
  460: 	}
  461: 	bat_units = 0;
  462:     }
  463:     if (bat == NULL) {
  464: 	bat_units = acpi_cmbat_units;
  465: 	bat = malloc(sizeof(struct acpi_cmbat_softc *) * bat_units,
  466: 		     M_ACPICMBAT, M_INTWAIT);
  467: 
  468: 	/* Collect softc pointers */
  469: 	for (i = 0; i < acpi_cmbat_units; i++) {
  470: 	    if ((dev = devclass_get_device(acpi_cmbat_devclass, i)) == NULL) {
  471: 		error = ENXIO;
  472: 		goto out;
  473: 	    }
  474: 	    if ((sc = device_get_softc(dev)) == NULL) {
  475: 		error = ENXIO;
  476: 		goto out;
  477: 	    }
  478: 	    bat[i] = sc;
  479: 	}
  480:     }
  481: 
  482:     /* Get battery status, valid rate and valid units */
  483:     batt_stat = valid_rate = valid_units = 0;
  484:     for (i = 0; i < acpi_cmbat_units; i++) {
  485: 	bat[i]->present = acpi_BatteryIsPresent(bat[i]->dev);
  486: 	if (!bat[i]->present)
  487: 	    continue;
  488: 
  489: 	acpi_cmbat_get_bst(bat[i]->dev);
  490: 
  491: 	/* If battery not installed, we get strange values */
  492: 	if (!acpi_cmbat_is_bst_valid(&(bat[i]->bst)) ||
  493: 	    !acpi_cmbat_is_bif_valid(&(bat[i]->bif))) {
  494: 
  495: 	    bat[i]->present = 0;
  496: 	    continue;
  497: 	}
  498: 
  499: 	valid_units++;
  500: 	bat[i]->cap = 100 * bat[i]->bst.cap / bat[i]->bif.lfcap;
  501: 	batt_stat |= bat[i]->bst.state;
  502: 
  503: 	if (bat[i]->bst.rate > 0) {
  504: 	    /*
  505: 	     * XXX Hack to calculate total battery time.
  506: 	     * Systems with 2 or more battries, they may get used
  507: 	     * one by one, thus bst.rate is set only to the one
  508: 	     * in use. For remaining batteries bst.rate = 0, which
  509: 	     * makes it impossible to calculate remaining time.
  510: 	     * Some other systems may need sum of bst.rate in
  511: 	     * dis-charging state.
  512: 	     * There for we sum up the bst.rate that is valid
  513: 	     * (in dis-charging state), and use the sum to
  514: 	     * calcutate remaining batteries' time.
  515: 	     */
  516: 	    if (bat[i]->bst.state & ACPI_BATT_STAT_DISCHARG)
  517: 		valid_rate += bat[i]->bst.rate;
  518: 	}
  519:     }
  520: 
  521:     /* Calculate total battery capacity and time */
  522:     total_cap = total_min = total_full = 0;
  523:     for (i = 0; i < acpi_cmbat_units; i++) {
  524: 	if (!bat[i]->present)
  525: 	    continue;
  526: 
  527: 	if (valid_rate > 0) {
  528: 	    /* Use the sum of bst.rate */
  529: 	    bat[i]->min = 60 * bat[i]->bst.cap / valid_rate;
  530: 	} else if (bat[i]->full_charge_time > 0) {
  531: 	    bat[i]->min = (bat[i]->full_charge_time * bat[i]->cap) / 100;
  532: 	} else {
  533: 	    /* Couldn't find valid rate and full battery time */
  534: 	    bat[i]->min = 0;
  535: 	}
  536: 	total_min += bat[i]->min;
  537: 	total_cap += bat[i]->cap;
  538: 	total_full += bat[i]->full_charge_time;
  539:     }
  540: 
  541:     /* Battery life */
  542:     if (valid_units == 0) {
  543: 	cap = -1;
  544: 	batt_stat = ACPI_BATT_STAT_NOT_PRESENT;
  545:     } else {
  546: 	cap = total_cap / valid_units;
  547:     }
  548: 
  549:     /* Battery time */
  550:     if (valid_units == 0) {
  551: 	min = -1;
  552:     } else if (valid_rate == 0 || (batt_stat & ACPI_BATT_STAT_CHARGING)) {
  553: 	if (total_full == 0)
  554: 	    min = -1;
  555: 	else
  556: 	    min = (total_full * cap) / 100;
  557:     } else {
  558: 	min = total_min;
  559:     }
  560:     acpi_cmbat_info_updated(&acpi_cmbat_info_lastupdated);
  561: 
  562: out:
  563:     battinfo->cap = cap;
  564:     battinfo->min = min;
  565:     battinfo->state = batt_stat;
  566: 
  567:     return (error);
  568: }
  569: 
  570: static void
  571: acpi_cmbat_init_battery(void *arg)
  572: {
  573:     int		retry;
  574:     device_t	dev = (device_t)arg;
  575:     struct acpi_cmbat_softc *sc = device_get_softc(dev);
  576: 
  577:     if (sc->initializing)
  578: 	return;
  579: 
  580:     sc->initializing = 1;
  581:     ACPI_VPRINT(dev, acpi_device_get_parent_softc(dev),
  582: 		"battery initialization start\n");
  583: 
  584:     for (retry = 0; retry < ACPI_CMBAT_RETRY_MAX; retry++, AcpiOsSleep(10, 0)) {
  585: 	sc->present = acpi_BatteryIsPresent(dev);
  586: 	if (!sc->present)
  587: 	    continue;
  588: 
  589: 	timespecclear(&sc->bst_lastupdated);
  590: 	timespecclear(&sc->bif_lastupdated);
  591: 
  592: 	acpi_cmbat_get_bst(dev);
  593: 	if (!acpi_cmbat_is_bst_valid(&sc->bst))
  594: 	    continue;
  595: 
  596: 	acpi_cmbat_get_bif(dev);
  597: 	if (!acpi_cmbat_is_bif_valid(&sc->bif))
  598: 	    continue;
  599: 	break;
  600:     }
  601: 
  602:     sc->initializing = 0;
  603:     if (retry == ACPI_CMBAT_RETRY_MAX) {
  604: 	ACPI_VPRINT(dev, acpi_device_get_parent_softc(dev),
  605: 		    "battery initialization failed, giving up\n");
  606:     } else {
  607: 	ACPI_VPRINT(dev, acpi_device_get_parent_softc(dev),
  608: 		    "battery initialization done, tried %d times\n", retry + 1);
  609:     }
  610: }
  611: 
  612: /*
  613:  * Public interfaces.
  614:  */
  615: int
  616: acpi_cmbat_get_battinfo(int unit, struct acpi_battinfo *battinfo)
  617: {
  618:     int		error;
  619:     device_t	dev;
  620:     struct acpi_cmbat_softc *sc;
  621: 
  622:     if (unit == -1)
  623: 	return (acpi_cmbat_get_total_battinfo(battinfo));
  624: 
  625:     if (acpi_cmbat_info_expired(&acpi_cmbat_info_lastupdated)) {
  626: 	error = acpi_cmbat_get_total_battinfo(battinfo);
  627: 	if (error)
  628: 	    goto out;
  629:     }
  630: 
  631:     error = 0;
  632:     if (unit >= acpi_cmbat_units) {
  633: 	error = ENXIO;
  634: 	goto out;
  635:     }
  636: 
  637:     if ((dev = devclass_get_device(acpi_cmbat_devclass, unit)) == NULL) {
  638: 	error = ENXIO;
  639: 	goto out;
  640:     }
  641:     if ((sc = device_get_softc(dev)) == NULL) {
  642: 	error = ENXIO;
  643: 	goto out;
  644:     }
  645: 
  646:     if (!sc->present) {
  647: 	battinfo->cap = -1;
  648: 	battinfo->min = -1;
  649: 	battinfo->state = ACPI_BATT_STAT_NOT_PRESENT;
  650:     } else {
  651: 	battinfo->cap = sc->cap;
  652: 	battinfo->min = sc->min;
  653: 	battinfo->state = sc->bst.state;
  654:     }
  655: 
  656: out:
  657:     return (error);
  658: }