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  * __FBSDID("$FreeBSD: src/sys/dev/acpica/acpi_cmbat.c,v 1.46.8.1 2009/04/15 03:14:26 kensmith Exp $");
  29  */
  30
  31 #include <sys/cdefs.h>
  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/ioccom.h>
  39
  40 #include <sys/rman.h>
  41 #include <sys/malloc.h>
  42
  43 #include "acpi.h"
  44 #include <dev/acpica5/acpivar.h>
  45 #include <dev/acpica5/acpiio.h>
  46
  47 MALLOC_DEFINE(M_ACPICMBAT, "acpicmbat", "ACPI control method battery data");
  48
  49 /* Number of times to retry initialization before giving up. */
  50 #define ACPI_CMBAT_RETRY_MAX    6
  51
  52 /* Check the battery once a minute. */
  53 #define CMBAT_POLLRATE          (60 * hz)
  54
  55 /* Hooks for the ACPI CA debugging infrastructure */
  56 #define _COMPONENT      ACPI_BATTERY
  57 ACPI_MODULE_NAME("BATTERY")
  58
  59 #define ACPI_BATTERY_BST_CHANGE 0x80
  60 #define ACPI_BATTERY_BIF_CHANGE 0x81
  61
  62 struct acpi_cmbat_softc {
  63     device_t        dev;
  64     int             flags;
  65
  66     struct acpi_bif bif;
  67     struct acpi_bst bst;
  68     struct timespec bst_lastupdated;
  69 };
  70
  71 ACPI_SERIAL_DECL(cmbat, "ACPI cmbat");
  72
  73 static int              acpi_cmbat_probe(device_t dev);
  74 static int              acpi_cmbat_attach(device_t dev);
  75 static int              acpi_cmbat_detach(device_t dev);
  76 static int              acpi_cmbat_resume(device_t dev);
  77 static void             acpi_cmbat_notify_handler(ACPI_HANDLE h, UINT32 notify,
  78                             void *context);
  79 static int              acpi_cmbat_info_expired(struct timespec *lastupdated);
  80 static void             acpi_cmbat_info_updated(struct timespec *lastupdated);
  81 static void             acpi_cmbat_get_bst(void *arg);
  82 static void             acpi_cmbat_get_bif_task(void *arg);
  83 static void             acpi_cmbat_get_bif(void *arg);
  84 static int              acpi_cmbat_bst(device_t dev, struct acpi_bst *bstp);
  85 static int              acpi_cmbat_bif(device_t dev, struct acpi_bif *bifp);
  86 static void             acpi_cmbat_init_battery(void *arg);
  87
  88 static device_method_t acpi_cmbat_methods[] = {
  89     /* Device interface */
  90     DEVMETHOD(device_probe,     acpi_cmbat_probe),
  91     DEVMETHOD(device_attach,    acpi_cmbat_attach),
  92     DEVMETHOD(device_detach,    acpi_cmbat_detach),
  93     DEVMETHOD(device_resume,    acpi_cmbat_resume),
  94
  95     /* ACPI battery interface */
  96     DEVMETHOD(acpi_batt_get_info, acpi_cmbat_bif),
  97     DEVMETHOD(acpi_batt_get_status, acpi_cmbat_bst),
  98
  99     {0, 0}
 100 };
 101
 102 static driver_t acpi_cmbat_driver = {
 103     "battery",
 104     acpi_cmbat_methods,
 105     sizeof(struct acpi_cmbat_softc),
 106 };
 107
 108 static devclass_t acpi_cmbat_devclass;
 109 DRIVER_MODULE(acpi_cmbat, acpi, acpi_cmbat_driver, acpi_cmbat_devclass, 0, 0);
 110 MODULE_DEPEND(acpi_cmbat, acpi, 1, 1, 1);
 111
 112 static int
 113 acpi_cmbat_probe(device_t dev)
 114 {
 115     static char *cmbat_ids[] = { "PNP0C0A", NULL };
 116
 117     if (acpi_disabled("cmbat") ||
 118         ACPI_ID_PROBE(device_get_parent(dev), dev, cmbat_ids) == NULL)
 119         return (ENXIO);
 120
 121     device_set_desc(dev, "ACPI Control Method Battery");
 122     return (0);
 123 }
 124
 125 static int
 126 acpi_cmbat_attach(device_t dev)
 127 {
 128     int         error;
 129     ACPI_HANDLE handle;
 130     struct acpi_cmbat_softc *sc;
 131
 132     sc = device_get_softc(dev);
 133     handle = acpi_get_handle(dev);
 134     sc->dev = dev;
 135
 136     timespecclear(&sc->bst_lastupdated);
 137
 138     error = acpi_battery_register(dev);
 139     if (error != 0) {
 140         device_printf(dev, "registering battery failed\n");
 141         return (error);
 142     }
 143
 144     /*
 145      * Install a system notify handler in addition to the device notify.
 146      * Toshiba notebook uses this alternate notify for its battery.
 147      */
 148     AcpiInstallNotifyHandler(handle, ACPI_ALL_NOTIFY,
 149         acpi_cmbat_notify_handler, dev);
 150
 151     AcpiOsExecute(OSL_NOTIFY_HANDLER, acpi_cmbat_init_battery, dev);
 152
 153     return (0);
 154 }
 155
 156 static int
 157 acpi_cmbat_detach(device_t dev)
 158 {
 159     ACPI_HANDLE handle;
 160
 161     handle = acpi_get_handle(dev);
 162     AcpiRemoveNotifyHandler(handle, ACPI_ALL_NOTIFY, acpi_cmbat_notify_handler);
 163     acpi_battery_remove(dev);
 164     return (0);
 165 }
 166
 167 static int
 168 acpi_cmbat_resume(device_t dev)
 169 {
 170
 171     AcpiOsExecute(OSL_NOTIFY_HANDLER, acpi_cmbat_init_battery, dev);
 172     return (0);
 173 }
 174
 175 static void
 176 acpi_cmbat_notify_handler(ACPI_HANDLE h, UINT32 notify, void *context)
 177 {
 178     struct acpi_cmbat_softc *sc;
 179     device_t dev;
 180
 181     dev = (device_t)context;
 182     sc = device_get_softc(dev);
 183
 184     switch (notify) {
 185     case ACPI_NOTIFY_DEVICE_CHECK:
 186     case ACPI_BATTERY_BST_CHANGE:
 187         /*
 188          * Clear the last updated time.  The next call to retrieve the
 189          * battery status will get the new value for us.
 190          */
 191         timespecclear(&sc->bst_lastupdated);
 192         break;
 193     case ACPI_NOTIFY_BUS_CHECK:
 194     case ACPI_BATTERY_BIF_CHANGE:
 195         /*
 196          * Queue a callback to get the current battery info from thread
 197          * context.  It's not safe to block in a notify handler.
 198          */
 199         AcpiOsExecute(OSL_NOTIFY_HANDLER, acpi_cmbat_get_bif_task, dev);
 200         break;
 201     }
 202
 203     acpi_UserNotify("CMBAT", h, notify);
 204 }
 205
 206 static int
 207 acpi_cmbat_info_expired(struct timespec *lastupdated)
 208 {
 209     struct timespec     curtime;
 210
 211     ACPI_SERIAL_ASSERT(cmbat);
 212
 213     if (lastupdated == NULL)
 214         return (TRUE);
 215     if (!timespecisset(lastupdated))
 216         return (TRUE);
 217
 218     getnanotime(&curtime);
 219     timespecsub(&curtime, lastupdated);
 220     return (curtime.tv_sec < 0 ||
 221             curtime.tv_sec > acpi_battery_get_info_expire());
 222 }
 223
 224 static void
 225 acpi_cmbat_info_updated(struct timespec *lastupdated)
 226 {
 227
 228     ACPI_SERIAL_ASSERT(cmbat);
 229
 230     if (lastupdated != NULL)
 231         getnanotime(lastupdated);
 232 }
 233
 234 static void
 235 acpi_cmbat_get_bst(void *arg)
 236 {
 237     struct acpi_cmbat_softc *sc;
 238     ACPI_STATUS as;
 239     ACPI_OBJECT *res;
 240     ACPI_HANDLE h;
 241     ACPI_BUFFER bst_buffer;
 242     device_t dev;
 243
 244     ACPI_SERIAL_ASSERT(cmbat);
 245
 246     dev = arg;
 247     sc = device_get_softc(dev);
 248     h = acpi_get_handle(dev);
 249     bst_buffer.Pointer = NULL;
 250     bst_buffer.Length = ACPI_ALLOCATE_BUFFER;
 251
 252     if (!acpi_cmbat_info_expired(&sc->bst_lastupdated))
 253         goto end;
 254
 255     as = AcpiEvaluateObject(h, "_BST", NULL, &bst_buffer);
 256     if (ACPI_FAILURE(as)) {
 257         ACPI_VPRINT(dev, acpi_device_get_parent_softc(dev),
 258                     "error fetching current battery status -- %s\n",
 259                     AcpiFormatException(as));
 260         goto end;
 261     }
 262
 263     res = (ACPI_OBJECT *)bst_buffer.Pointer;
 264     if (!ACPI_PKG_VALID(res, 4)) {
 265         ACPI_VPRINT(dev, acpi_device_get_parent_softc(dev),
 266                     "battery status corrupted\n");
 267         goto end;
 268     }
 269
 270     if (acpi_PkgInt32(res, 0, &sc->bst.state) != 0)
 271         goto end;
 272     if (acpi_PkgInt32(res, 1, &sc->bst.rate) != 0)
 273         goto end;
 274     if (acpi_PkgInt32(res, 2, &sc->bst.cap) != 0)
 275         goto end;
 276     if (acpi_PkgInt32(res, 3, &sc->bst.volt) != 0)
 277         goto end;
 278     acpi_cmbat_info_updated(&sc->bst_lastupdated);
 279
 280     /* XXX If all batteries are critical, perhaps we should suspend. */
 281     if (sc->bst.state & ACPI_BATT_STAT_CRITICAL) {
 282         if ((sc->flags & ACPI_BATT_STAT_CRITICAL) == 0) {
 283             sc->flags |= ACPI_BATT_STAT_CRITICAL;
 284             device_printf(dev, "critically low charge!\n");
 285         }
 286     } else
 287         sc->flags &= ~ACPI_BATT_STAT_CRITICAL;
 288
 289 end:
 290     if (bst_buffer.Pointer != NULL)
 291         AcpiOsFree(bst_buffer.Pointer);
 292 }
 293
 294 /* XXX There should be a cleaner way to do this locking. */
 295 static void
 296 acpi_cmbat_get_bif_task(void *arg)
 297 {
 298
 299     ACPI_SERIAL_BEGIN(cmbat);
 300     acpi_cmbat_get_bif(arg);
 301     ACPI_SERIAL_END(cmbat);
 302 }
 303
 304 static void
 305 acpi_cmbat_get_bif(void *arg)
 306 {
 307     struct acpi_cmbat_softc *sc;
 308     ACPI_STATUS as;
 309     ACPI_OBJECT *res;
 310     ACPI_HANDLE h;
 311     ACPI_BUFFER bif_buffer;
 312     device_t dev;
 313
 314     ACPI_SERIAL_ASSERT(cmbat);
 315
 316     dev = arg;
 317     sc = device_get_softc(dev);
 318     h = acpi_get_handle(dev);
 319     bif_buffer.Pointer = NULL;
 320     bif_buffer.Length = ACPI_ALLOCATE_BUFFER;
 321
 322     as = AcpiEvaluateObject(h, "_BIF", NULL, &bif_buffer);
 323     if (ACPI_FAILURE(as)) {
 324         ACPI_VPRINT(dev, acpi_device_get_parent_softc(dev),
 325                     "error fetching current battery info -- %s\n",
 326                     AcpiFormatException(as));
 327         goto end;
 328     }
 329
 330     res = (ACPI_OBJECT *)bif_buffer.Pointer;
 331     if (!ACPI_PKG_VALID(res, 13)) {
 332         ACPI_VPRINT(dev, acpi_device_get_parent_softc(dev),
 333                     "battery info corrupted\n");
 334         goto end;
 335     }
 336
 337     if (acpi_PkgInt32(res, 0, &sc->bif.units) != 0)
 338         goto end;
 339     if (acpi_PkgInt32(res, 1, &sc->bif.dcap) != 0)
 340         goto end;
 341     if (acpi_PkgInt32(res, 2, &sc->bif.lfcap) != 0)
 342         goto end;
 343     if (acpi_PkgInt32(res, 3, &sc->bif.btech) != 0)
 344         goto end;
 345     if (acpi_PkgInt32(res, 4, &sc->bif.dvol) != 0)
 346         goto end;
 347     if (acpi_PkgInt32(res, 5, &sc->bif.wcap) != 0)
 348         goto end;
 349     if (acpi_PkgInt32(res, 6, &sc->bif.lcap) != 0)
 350         goto end;
 351     if (acpi_PkgInt32(res, 7, &sc->bif.gra1) != 0)
 352         goto end;
 353     if (acpi_PkgInt32(res, 8, &sc->bif.gra2) != 0)
 354         goto end;
 355     if (acpi_PkgStr(res,  9, sc->bif.model, ACPI_CMBAT_MAXSTRLEN) != 0)
 356         goto end;
 357     if (acpi_PkgStr(res, 10, sc->bif.serial, ACPI_CMBAT_MAXSTRLEN) != 0)
 358         goto end;
 359     if (acpi_PkgStr(res, 11, sc->bif.type, ACPI_CMBAT_MAXSTRLEN) != 0)
 360         goto end;
 361     if (acpi_PkgStr(res, 12, sc->bif.oeminfo, ACPI_CMBAT_MAXSTRLEN) != 0)
 362         goto end;
 363
 364 end:
 365     if (bif_buffer.Pointer != NULL)
 366         AcpiOsFree(bif_buffer.Pointer);
 367 }
 368
 369 static int
 370 acpi_cmbat_bif(device_t dev, struct acpi_bif *bifp)
 371 {
 372     struct acpi_cmbat_softc *sc;
 373
 374     sc = device_get_softc(dev);
 375
 376     /*
 377      * Just copy the data.  The only value that should change is the
 378      * last-full capacity, so we only update when we get a notify that says
 379      * the info has changed.  Many systems apparently take a long time to
 380      * process a _BIF call so we avoid it if possible.
 381      */
 382     ACPI_SERIAL_BEGIN(cmbat);
 383     bifp->units = sc->bif.units;
 384     bifp->dcap = sc->bif.dcap;
 385     bifp->lfcap = sc->bif.lfcap;
 386     bifp->btech = sc->bif.btech;
 387     bifp->dvol = sc->bif.dvol;
 388     bifp->wcap = sc->bif.wcap;
 389     bifp->lcap = sc->bif.lcap;
 390     bifp->gra1 = sc->bif.gra1;
 391     bifp->gra2 = sc->bif.gra2;
 392     strncpy(bifp->model, sc->bif.model, sizeof(sc->bif.model));
 393     strncpy(bifp->serial, sc->bif.serial, sizeof(sc->bif.serial));
 394     strncpy(bifp->type, sc->bif.type, sizeof(sc->bif.type));
 395     strncpy(bifp->oeminfo, sc->bif.oeminfo, sizeof(sc->bif.oeminfo));
 396     ACPI_SERIAL_END(cmbat);
 397
 398     return (0);
 399 }
 400
 401 static int
 402 acpi_cmbat_bst(device_t dev, struct acpi_bst *bstp)
 403 {
 404     struct acpi_cmbat_softc *sc;
 405
 406     sc = device_get_softc(dev);
 407
 408     ACPI_SERIAL_BEGIN(cmbat);
 409     if (acpi_BatteryIsPresent(dev)) {
 410         acpi_cmbat_get_bst(dev);
 411         bstp->state = sc->bst.state;
 412         bstp->rate = sc->bst.rate;
 413         bstp->cap = sc->bst.cap;
 414         bstp->volt = sc->bst.volt;
 415     } else
 416         bstp->state = ACPI_BATT_STAT_NOT_PRESENT;
 417     ACPI_SERIAL_END(cmbat);
 418
 419     return (0);
 420 }
 421
 422 static void
 423 acpi_cmbat_init_battery(void *arg)
 424 {
 425     struct acpi_cmbat_softc *sc;
 426     int         retry, valid;
 427     device_t    dev;
 428
 429     dev = (device_t)arg;
 430     sc = device_get_softc(dev);
 431     ACPI_VPRINT(dev, acpi_device_get_parent_softc(dev),
 432                 "battery initialization start\n");
 433
 434     /*
 435      * Try repeatedly to get valid data from the battery.  Since the
 436      * embedded controller isn't always ready just after boot, we may have
 437      * to wait a while.
 438      */
 439     for (retry = 0; retry < ACPI_CMBAT_RETRY_MAX; retry++, AcpiOsSleep(10000)) {
 440         /* batteries on DOCK can be ejected w/ DOCK during retrying */
 441         if (!device_is_attached(dev))
 442             return;
 443
 444         if (!acpi_BatteryIsPresent(dev))
 445             continue;
 446
 447         /*
 448          * Only query the battery if this is the first try or the specific
 449          * type of info is still invalid.
 450          */
 451         ACPI_SERIAL_BEGIN(cmbat);
 452         if (retry == 0 || !acpi_battery_bst_valid(&sc->bst)) {
 453             timespecclear(&sc->bst_lastupdated);
 454             acpi_cmbat_get_bst(dev);
 455         }
 456         if (retry == 0 || !acpi_battery_bif_valid(&sc->bif))
 457             acpi_cmbat_get_bif(dev);
 458
 459         valid = acpi_battery_bst_valid(&sc->bst) &&
 460             acpi_battery_bif_valid(&sc->bif);
 461         ACPI_SERIAL_END(cmbat);
 462
 463         if (valid)
 464             break;
 465     }
 466
 467     if (retry == ACPI_CMBAT_RETRY_MAX) {
 468         ACPI_VPRINT(dev, acpi_device_get_parent_softc(dev),
 469                     "battery initialization failed, giving up\n");
 470     } else {
 471         ACPI_VPRINT(dev, acpi_device_get_parent_softc(dev),
 472                     "battery initialization done, tried %d times\n", retry + 1);
 473     }
 474 }