sys/dev/acpica5/acpi_cmbat.c

   1 /*-
   2  * Copyright (c) 2005 Nate Lawson
   3  * Copyright (c) 2000 Munehiro Matsuda
   4  * Copyright (c) 2000 Takanori Watanabe
   5  * Copyright (c) 2000 Mitsuru IWASAKI <iwasaki@FreeBSD.org>
   6  * All rights reserved.
   7  *
   8  * Redistribution and use in source and binary forms, with or without
   9  * modification, are permitted provided that the following conditions
  10  * are met:
  11  * 1. Redistributions of source code must retain the above copyright
  12  *    notice, this list of conditions and the following disclaimer.
  13  * 2. Redistributions in binary form must reproduce the above copyright
  14  *    notice, this list of conditions and the following disclaimer in the
  15  *    documentation and/or other materials provided with the distribution.
  16  *
  17  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
  18  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  19  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  20  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
  21  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  22  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  23  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  24  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  25  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  26  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  27  * SUCH DAMAGE.
  28  *
  29  * $FreeBSD: src/sys/dev/acpica/acpi_cmbat.c,v 1.46 2007/03/22 18:16:40 jkim Exp $
  30  * $DragonFly: src/sys/dev/acpica5/acpi_cmbat.c,v 1.12 2008/09/29 06:59:45 hasso Exp $
  31  */
  32
  33 #include "opt_acpi.h"
  34 #include <sys/param.h>
  35 #include <sys/kernel.h>
  36 #include <sys/module.h>
  37 #include <sys/bus.h>
  38 #include <sys/rman.h>
  39 #include <sys/malloc.h>
  40 #include <sys/thread2.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     int             flags;
  64
  65     struct acpi_bif bif;
  66     struct acpi_bst bst;
  67     struct timespec bst_lastupdated;
  68 };
  69
  70 static int              acpi_cmbat_probe(device_t dev);
  71 static int              acpi_cmbat_attach(device_t dev);
  72 static int              acpi_cmbat_detach(device_t dev);
  73 static int              acpi_cmbat_resume(device_t dev);
  74 static void             acpi_cmbat_notify_handler(ACPI_HANDLE h, UINT32 notify,
  75                             void *context);
  76 static int              acpi_cmbat_info_expired(struct timespec *lastupdated);
  77 static void             acpi_cmbat_info_updated(struct timespec *lastupdated);
  78 static void             acpi_cmbat_get_bst(void *arg);
  79 static void             acpi_cmbat_get_bif_task(void *arg);
  80 static void             acpi_cmbat_get_bif(void *arg);
  81 static int              acpi_cmbat_bst(device_t dev, struct acpi_bst *bstp);
  82 static int              acpi_cmbat_bif(device_t dev, struct acpi_bif *bifp);
  83 static void             acpi_cmbat_init_battery(void *arg);
  84
  85 static device_method_t acpi_cmbat_methods[] = {
  86     /* Device interface */
  87     DEVMETHOD(device_probe,     acpi_cmbat_probe),
  88     DEVMETHOD(device_attach,    acpi_cmbat_attach),
  89     DEVMETHOD(device_detach,    acpi_cmbat_detach),
  90     DEVMETHOD(device_resume,    acpi_cmbat_resume),
  91
  92     /* ACPI battery interface */
  93     DEVMETHOD(acpi_batt_get_info, acpi_cmbat_bif),
  94     DEVMETHOD(acpi_batt_get_status, acpi_cmbat_bst),
  95
  96     {0, 0}
  97 };
  98
  99 static driver_t acpi_cmbat_driver = {
 100     "battery",
 101     acpi_cmbat_methods,
 102     sizeof(struct acpi_cmbat_softc),
 103 };
 104
 105 static devclass_t acpi_cmbat_devclass;
 106 DRIVER_MODULE(acpi_cmbat, acpi, acpi_cmbat_driver, acpi_cmbat_devclass, 0, 0);
 107 MODULE_DEPEND(acpi_cmbat, acpi, 1, 1, 1);
 108
 109 static int
 110 acpi_cmbat_probe(device_t dev)
 111 {
 112     static char *cmbat_ids[] = { "PNP0C0A", NULL };
 113
 114     if (acpi_disabled("cmbat") ||
 115         ACPI_ID_PROBE(device_get_parent(dev), dev, cmbat_ids) == NULL)
 116         return (ENXIO);
 117
 118     device_set_desc(dev, "ACPI Control Method Battery");
 119     return (0);
 120 }
 121
 122 static int
 123 acpi_cmbat_attach(device_t dev)
 124 {
 125     int         error;
 126     ACPI_HANDLE handle;
 127     struct acpi_cmbat_softc *sc;
 128
 129     sc = device_get_softc(dev);
 130     handle = acpi_get_handle(dev);
 131     sc->dev = dev;
 132
 133     timespecclear(&sc->bst_lastupdated);
 134
 135     error = acpi_battery_register(dev);
 136     if (error != 0) {
 137         device_printf(dev, "registering battery failed\n");
 138         return (error);
 139     }
 140
 141     /*
 142      * Install a system notify handler in addition to the device notify.
 143      * Toshiba notebook uses this alternate notify for its battery.
 144      */
 145     AcpiInstallNotifyHandler(handle, ACPI_ALL_NOTIFY,
 146         acpi_cmbat_notify_handler, dev);
 147
 148     AcpiOsExecute(OSL_NOTIFY_HANDLER, acpi_cmbat_init_battery, dev);
 149
 150     return (0);
 151 }
 152
 153 static int
 154 acpi_cmbat_detach(device_t dev)
 155 {
 156     ACPI_HANDLE handle;
 157
 158     handle = acpi_get_handle(dev);
 159     AcpiRemoveNotifyHandler(handle, ACPI_ALL_NOTIFY, acpi_cmbat_notify_handler);
 160     acpi_battery_remove(dev);
 161     return (0);
 162 }
 163
 164 static int
 165 acpi_cmbat_resume(device_t dev)
 166 {
 167
 168     AcpiOsExecute(OSL_NOTIFY_HANDLER, acpi_cmbat_init_battery, dev);
 169     return (0);
 170 }
 171
 172 static void
 173 acpi_cmbat_notify_handler(ACPI_HANDLE h, UINT32 notify, void *context)
 174 {
 175     struct acpi_cmbat_softc *sc;
 176     device_t dev;
 177
 178     dev = (device_t)context;
 179     sc = device_get_softc(dev);
 180
 181     switch (notify) {
 182     case ACPI_NOTIFY_DEVICE_CHECK:
 183     case ACPI_BATTERY_BST_CHANGE:
 184         /*
 185          * Clear the last updated time.  The next call to retrieve the
 186          * battery status will get the new value for us.
 187          */
 188         timespecclear(&sc->bst_lastupdated);
 189         break;
 190     case ACPI_NOTIFY_BUS_CHECK:
 191     case ACPI_BATTERY_BIF_CHANGE:
 192         /*
 193          * Queue a callback to get the current battery info from thread
 194          * context.  It's not safe to block in a notify handler.
 195          */
 196         AcpiOsExecute(OSL_NOTIFY_HANDLER, acpi_cmbat_get_bif_task, dev);
 197         break;
 198     }
 199
 200     acpi_UserNotify("CMBAT", h, notify);
 201 }
 202
 203 static int
 204 acpi_cmbat_info_expired(struct timespec *lastupdated)
 205 {
 206     struct timespec     curtime;
 207
 208     if (lastupdated == NULL)
 209         return (TRUE);
 210     if (!timespecisset(lastupdated))
 211         return (TRUE);
 212
 213     getnanotime(&curtime);
 214     timespecsub(&curtime, lastupdated);
 215     return (curtime.tv_sec < 0 ||
 216             curtime.tv_sec > acpi_battery_get_info_expire());
 217 }
 218
 219 static void
 220 acpi_cmbat_info_updated(struct timespec *lastupdated)
 221 {
 222     if (lastupdated != NULL)
 223         getnanotime(lastupdated);
 224 }
 225
 226 static void
 227 acpi_cmbat_get_bst(void *arg)
 228 {
 229     struct acpi_cmbat_softc *sc;
 230     ACPI_STATUS as;
 231     ACPI_OBJECT *res;
 232     ACPI_HANDLE h;
 233     ACPI_BUFFER bst_buffer;
 234     device_t dev;
 235
 236     dev = arg;
 237     sc = device_get_softc(dev);
 238     h = acpi_get_handle(dev);
 239     bst_buffer.Pointer = NULL;
 240     bst_buffer.Length = ACPI_ALLOCATE_BUFFER;
 241
 242     if (!acpi_cmbat_info_expired(&sc->bst_lastupdated))
 243         goto end;
 244
 245     as = AcpiEvaluateObject(h, "_BST", NULL, &bst_buffer);
 246     if (ACPI_FAILURE(as)) {
 247         ACPI_VPRINT(dev, acpi_device_get_parent_softc(dev),
 248                     "error fetching current battery status -- %s\n",
 249                     AcpiFormatException(as));
 250         goto end;
 251     }
 252
 253     res = (ACPI_OBJECT *)bst_buffer.Pointer;
 254     if (!ACPI_PKG_VALID(res, 4)) {
 255         ACPI_VPRINT(dev, acpi_device_get_parent_softc(dev),
 256                     "battery status corrupted\n");
 257         goto end;
 258     }
 259
 260     if (acpi_PkgInt32(res, 0, &sc->bst.state) != 0)
 261         goto end;
 262     if (acpi_PkgInt32(res, 1, &sc->bst.rate) != 0)
 263         goto end;
 264     if (acpi_PkgInt32(res, 2, &sc->bst.cap) != 0)
 265         goto end;
 266     if (acpi_PkgInt32(res, 3, &sc->bst.volt) != 0)
 267         goto end;
 268     acpi_cmbat_info_updated(&sc->bst_lastupdated);
 269
 270     /* XXX If all batteries are critical, perhaps we should suspend. */
 271     if (sc->bst.state & ACPI_BATT_STAT_CRITICAL) {
 272         if ((sc->flags & ACPI_BATT_STAT_CRITICAL) == 0) {
 273             sc->flags |= ACPI_BATT_STAT_CRITICAL;
 274             device_printf(dev, "critically low charge!\n");
 275         }
 276     } else
 277         sc->flags &= ~ACPI_BATT_STAT_CRITICAL;
 278
 279 end:
 280     if (bst_buffer.Pointer != NULL)
 281         AcpiOsFree(bst_buffer.Pointer);
 282 }
 283
 284 /* XXX There should be a cleaner way to do this locking. */
 285 static void
 286 acpi_cmbat_get_bif_task(void *arg)
 287 {
 288     crit_enter();
 289     acpi_cmbat_get_bif(arg);
 290     crit_exit();
 291 }
 292
 293 static void
 294 acpi_cmbat_get_bif(void *arg)
 295 {
 296     struct acpi_cmbat_softc *sc;
 297     ACPI_STATUS as;
 298     ACPI_OBJECT *res;
 299     ACPI_HANDLE h;
 300     ACPI_BUFFER bif_buffer;
 301     device_t dev;
 302
 303     dev = arg;
 304     sc = device_get_softc(dev);
 305     h = acpi_get_handle(dev);
 306     bif_buffer.Pointer = NULL;
 307     bif_buffer.Length = ACPI_ALLOCATE_BUFFER;
 308
 309     as = AcpiEvaluateObject(h, "_BIF", NULL, &bif_buffer);
 310     if (ACPI_FAILURE(as)) {
 311         ACPI_VPRINT(dev, acpi_device_get_parent_softc(dev),
 312                     "error fetching current battery info -- %s\n",
 313                     AcpiFormatException(as));
 314         goto end;
 315     }
 316
 317     res = (ACPI_OBJECT *)bif_buffer.Pointer;
 318     if (!ACPI_PKG_VALID(res, 13)) {
 319         ACPI_VPRINT(dev, acpi_device_get_parent_softc(dev),
 320                     "battery info corrupted\n");
 321         goto end;
 322     }
 323
 324     if (acpi_PkgInt32(res, 0, &sc->bif.units) != 0)
 325         goto end;
 326     if (acpi_PkgInt32(res, 1, &sc->bif.dcap) != 0)
 327         goto end;
 328     if (acpi_PkgInt32(res, 2, &sc->bif.lfcap) != 0)
 329         goto end;
 330     if (acpi_PkgInt32(res, 3, &sc->bif.btech) != 0)
 331         goto end;
 332     if (acpi_PkgInt32(res, 4, &sc->bif.dvol) != 0)
 333         goto end;
 334     if (acpi_PkgInt32(res, 5, &sc->bif.wcap) != 0)
 335         goto end;
 336     if (acpi_PkgInt32(res, 6, &sc->bif.lcap) != 0)
 337         goto end;
 338     if (acpi_PkgInt32(res, 7, &sc->bif.gra1) != 0)
 339         goto end;
 340     if (acpi_PkgInt32(res, 8, &sc->bif.gra2) != 0)
 341         goto end;
 342     if (acpi_PkgStr(res,  9, sc->bif.model, ACPI_CMBAT_MAXSTRLEN) != 0)
 343         goto end;
 344     if (acpi_PkgStr(res, 10, sc->bif.serial, ACPI_CMBAT_MAXSTRLEN) != 0)
 345         goto end;
 346     if (acpi_PkgStr(res, 11, sc->bif.type, ACPI_CMBAT_MAXSTRLEN) != 0)
 347         goto end;
 348     if (acpi_PkgStr(res, 12, sc->bif.oeminfo, ACPI_CMBAT_MAXSTRLEN) != 0)
 349         goto end;
 350
 351 end:
 352     if (bif_buffer.Pointer != NULL)
 353         AcpiOsFree(bif_buffer.Pointer);
 354 }
 355
 356 static int
 357 acpi_cmbat_bif(device_t dev, struct acpi_bif *bifp)
 358 {
 359     struct acpi_cmbat_softc *sc;
 360
 361     sc = device_get_softc(dev);
 362
 363     /*
 364      * Just copy the data.  The only value that should change is the
 365      * last-full capacity, so we only update when we get a notify that says
 366      * the info has changed.  Many systems apparently take a long time to
 367      * process a _BIF call so we avoid it if possible.
 368      */
 369     crit_enter();
 370     bifp->units = sc->bif.units;
 371     bifp->dcap = sc->bif.dcap;
 372     bifp->lfcap = sc->bif.lfcap;
 373     bifp->btech = sc->bif.btech;
 374     bifp->dvol = sc->bif.dvol;
 375     bifp->wcap = sc->bif.wcap;
 376     bifp->lcap = sc->bif.lcap;
 377     bifp->gra1 = sc->bif.gra1;
 378     bifp->gra2 = sc->bif.gra2;
 379     strncpy(bifp->model, sc->bif.model, sizeof(sc->bif.model));
 380     strncpy(bifp->serial, sc->bif.serial, sizeof(sc->bif.serial));
 381     strncpy(bifp->type, sc->bif.type, sizeof(sc->bif.type));
 382     strncpy(bifp->oeminfo, sc->bif.oeminfo, sizeof(sc->bif.oeminfo));
 383     crit_exit();
 384
 385     return (0);
 386 }
 387
 388 static int
 389 acpi_cmbat_bst(device_t dev, struct acpi_bst *bstp)
 390 {
 391     struct acpi_cmbat_softc *sc;
 392
 393     sc = device_get_softc(dev);
 394
 395     crit_enter();
 396     if (acpi_BatteryIsPresent(dev)) {
 397         acpi_cmbat_get_bst(dev);
 398         bstp->state = sc->bst.state;
 399         bstp->rate = sc->bst.rate;
 400         bstp->cap = sc->bst.cap;
 401         bstp->volt = sc->bst.volt;
 402     } else
 403         bstp->state = ACPI_BATT_STAT_NOT_PRESENT;
 404     crit_exit();
 405
 406     return (0);
 407 }
 408
 409 static void
 410 acpi_cmbat_init_battery(void *arg)
 411 {
 412     struct acpi_cmbat_softc *sc;
 413     int         retry, valid;
 414     device_t    dev;
 415
 416     dev = (device_t)arg;
 417     sc = device_get_softc(dev);
 418     ACPI_VPRINT(dev, acpi_device_get_parent_softc(dev),
 419                 "battery initialization start\n");
 420
 421     /*
 422      * Try repeatedly to get valid data from the battery.  Since the
 423      * embedded controller isn't always ready just after boot, we may have
 424      * to wait a while.
 425      */
 426     for (retry = 0; retry < ACPI_CMBAT_RETRY_MAX; retry++, AcpiOsSleep(10)) {
 427         /* batteries on DOCK can be ejected w/ DOCK during retrying */
 428         if (!device_is_attached(dev))
 429             return;
 430
 431         if (!acpi_BatteryIsPresent(dev))
 432             continue;
 433
 434         /*
 435          * Only query the battery if this is the first try or the specific
 436          * type of info is still invalid.
 437          */
 438         crit_enter();
 439         if (retry == 0 || !acpi_battery_bst_valid(&sc->bst)) {
 440             timespecclear(&sc->bst_lastupdated);
 441             acpi_cmbat_get_bst(dev);
 442         }
 443         if (retry == 0 || !acpi_battery_bif_valid(&sc->bif))
 444             acpi_cmbat_get_bif(dev);
 445
 446         valid = acpi_battery_bst_valid(&sc->bst) &&
 447             acpi_battery_bif_valid(&sc->bif);
 448         crit_exit();
 449
 450         if (valid)
 451             break;
 452     }
 453
 454     if (retry == ACPI_CMBAT_RETRY_MAX) {
 455         ACPI_VPRINT(dev, acpi_device_get_parent_softc(dev),
 456                     "battery initialization failed, giving up\n");
 457     } else {
 458         ACPI_VPRINT(dev, acpi_device_get_parent_softc(dev),
 459                     "battery initialization done, tried %d times\n", retry + 1);
 460     }
 461 }