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 30 #include <sys/cdefs.h> 31 __FBSDID("$FreeBSD$"); 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 <machine/bus.h> 41 #include <sys/rman.h> 42 #include <sys/malloc.h> 43 44 #include <contrib/dev/acpica/include/acpi.h> 45 46 #include <dev/acpica/acpivar.h> 47 #include <dev/acpica/acpiio.h> 48 49 static MALLOC_DEFINE(M_ACPICMBAT, "acpicmbat", 50 "ACPI control method battery data"); 51 52 /* Number of times to retry initialization before giving up. */ 53 #define ACPI_CMBAT_RETRY_MAX 6 54 55 /* Check the battery once a minute. */ 56 #define CMBAT_POLLRATE (60 * hz) 57 58 /* Hooks for the ACPI CA debugging infrastructure */ 59 #define _COMPONENT ACPI_BATTERY 60 ACPI_MODULE_NAME("BATTERY") 61 62 #define ACPI_BATTERY_BST_CHANGE 0x80 63 #define ACPI_BATTERY_BIF_CHANGE 0x81 64 65 struct acpi_cmbat_softc { 66 device_t dev; 67 int flags; 68 69 struct acpi_bif bif; 70 struct acpi_bst bst; 71 struct timespec bst_lastupdated; 72 }; 73 74 ACPI_SERIAL_DECL(cmbat, "ACPI cmbat"); 75 76 static int acpi_cmbat_probe(device_t dev); 77 static int acpi_cmbat_attach(device_t dev); 78 static int acpi_cmbat_detach(device_t dev); 79 static int acpi_cmbat_resume(device_t dev); 80 static void acpi_cmbat_notify_handler(ACPI_HANDLE h, UINT32 notify, 81 void *context); 82 static int acpi_cmbat_info_expired(struct timespec *lastupdated); 83 static void acpi_cmbat_info_updated(struct timespec *lastupdated); 84 static void acpi_cmbat_get_bst(void *arg); 85 static void acpi_cmbat_get_bif_task(void *arg); 86 static void acpi_cmbat_get_bif(void *arg); 87 static int acpi_cmbat_bst(device_t dev, struct acpi_bst *bstp); 88 static int acpi_cmbat_bif(device_t dev, struct acpi_bif *bifp); 89 static void acpi_cmbat_init_battery(void *arg); 90 91 static device_method_t acpi_cmbat_methods[] = { 92 /* Device interface */ 93 DEVMETHOD(device_probe, acpi_cmbat_probe), 94 DEVMETHOD(device_attach, acpi_cmbat_attach), 95 DEVMETHOD(device_detach, acpi_cmbat_detach), 96 DEVMETHOD(device_resume, acpi_cmbat_resume), 97 98 /* ACPI battery interface */ 99 DEVMETHOD(acpi_batt_get_info, acpi_cmbat_bif), 100 DEVMETHOD(acpi_batt_get_status, acpi_cmbat_bst), 101 102 DEVMETHOD_END 103 }; 104 105 static driver_t acpi_cmbat_driver = { 106 "battery", 107 acpi_cmbat_methods, 108 sizeof(struct acpi_cmbat_softc), 109 }; 110 111 static devclass_t acpi_cmbat_devclass; 112 DRIVER_MODULE(acpi_cmbat, acpi, acpi_cmbat_driver, acpi_cmbat_devclass, 0, 0); 113 MODULE_DEPEND(acpi_cmbat, acpi, 1, 1, 1); 114 115 static int 116 acpi_cmbat_probe(device_t dev) 117 { 118 static char *cmbat_ids[] = { "PNP0C0A", NULL }; 119 120 if (acpi_disabled("cmbat") || 121 ACPI_ID_PROBE(device_get_parent(dev), dev, cmbat_ids) == NULL) 122 return (ENXIO); 123 124 device_set_desc(dev, "ACPI Control Method Battery"); 125 return (0); 126 } 127 128 static int 129 acpi_cmbat_attach(device_t dev) 130 { 131 int error; 132 ACPI_HANDLE handle; 133 struct acpi_cmbat_softc *sc; 134 135 sc = device_get_softc(dev); 136 handle = acpi_get_handle(dev); 137 sc->dev = dev; 138 139 timespecclear(&sc->bst_lastupdated); 140 141 error = acpi_battery_register(dev); 142 if (error != 0) { 143 device_printf(dev, "registering battery failed\n"); 144 return (error); 145 } 146 147 /* 148 * Install a system notify handler in addition to the device notify. 149 * Toshiba notebook uses this alternate notify for its battery. 150 */ 151 AcpiInstallNotifyHandler(handle, ACPI_ALL_NOTIFY, 152 acpi_cmbat_notify_handler, dev); 153 154 AcpiOsExecute(OSL_NOTIFY_HANDLER, acpi_cmbat_init_battery, dev); 155 156 return (0); 157 } 158 159 static int 160 acpi_cmbat_detach(device_t dev) 161 { 162 ACPI_HANDLE handle; 163 164 handle = acpi_get_handle(dev); 165 AcpiRemoveNotifyHandler(handle, ACPI_ALL_NOTIFY, acpi_cmbat_notify_handler); 166 acpi_battery_remove(dev); 167 return (0); 168 } 169 170 static int 171 acpi_cmbat_resume(device_t dev) 172 { 173 174 AcpiOsExecute(OSL_NOTIFY_HANDLER, acpi_cmbat_init_battery, dev); 175 return (0); 176 } 177 178 static void 179 acpi_cmbat_notify_handler(ACPI_HANDLE h, UINT32 notify, void *context) 180 { 181 struct acpi_cmbat_softc *sc; 182 device_t dev; 183 184 dev = (device_t)context; 185 sc = device_get_softc(dev); 186 187 switch (notify) { 188 case ACPI_NOTIFY_DEVICE_CHECK: 189 case ACPI_BATTERY_BST_CHANGE: 190 /* 191 * Clear the last updated time. The next call to retrieve the 192 * battery status will get the new value for us. 193 */ 194 timespecclear(&sc->bst_lastupdated); 195 break; 196 case ACPI_NOTIFY_BUS_CHECK: 197 case ACPI_BATTERY_BIF_CHANGE: 198 /* 199 * Queue a callback to get the current battery info from thread 200 * context. It's not safe to block in a notify handler. 201 */ 202 AcpiOsExecute(OSL_NOTIFY_HANDLER, acpi_cmbat_get_bif_task, dev); 203 break; 204 } 205 206 acpi_UserNotify("CMBAT", h, notify); 207 } 208 209 static int 210 acpi_cmbat_info_expired(struct timespec *lastupdated) 211 { 212 struct timespec curtime; 213 214 ACPI_SERIAL_ASSERT(cmbat); 215 216 if (lastupdated == NULL) 217 return (TRUE); 218 if (!timespecisset(lastupdated)) 219 return (TRUE); 220 221 getnanotime(&curtime); 222 timespecsub(&curtime, lastupdated); 223 return (curtime.tv_sec < 0 || 224 curtime.tv_sec > acpi_battery_get_info_expire()); 225 } 226 227 static void 228 acpi_cmbat_info_updated(struct timespec *lastupdated) 229 { 230 231 ACPI_SERIAL_ASSERT(cmbat); 232 233 if (lastupdated != NULL) 234 getnanotime(lastupdated); 235 } 236 237 static void 238 acpi_cmbat_get_bst(void *arg) 239 { 240 struct acpi_cmbat_softc *sc; 241 ACPI_STATUS as; 242 ACPI_OBJECT *res; 243 ACPI_HANDLE h; 244 ACPI_BUFFER bst_buffer; 245 device_t dev; 246 247 ACPI_SERIAL_ASSERT(cmbat); 248 249 dev = arg; 250 sc = device_get_softc(dev); 251 h = acpi_get_handle(dev); 252 bst_buffer.Pointer = NULL; 253 bst_buffer.Length = ACPI_ALLOCATE_BUFFER; 254 255 if (!acpi_cmbat_info_expired(&sc->bst_lastupdated)) 256 goto end; 257 258 as = AcpiEvaluateObject(h, "_BST", NULL, &bst_buffer); 259 if (ACPI_FAILURE(as)) { 260 ACPI_VPRINT(dev, acpi_device_get_parent_softc(dev), 261 "error fetching current battery status -- %s\n", 262 AcpiFormatException(as)); 263 goto end; 264 } 265 266 res = (ACPI_OBJECT *)bst_buffer.Pointer; 267 if (!ACPI_PKG_VALID(res, 4)) { 268 ACPI_VPRINT(dev, acpi_device_get_parent_softc(dev), 269 "battery status corrupted\n"); 270 goto end; 271 } 272 273 if (acpi_PkgInt32(res, 0, &sc->bst.state) != 0) 274 goto end; 275 if (acpi_PkgInt32(res, 1, &sc->bst.rate) != 0) 276 goto end; 277 if (acpi_PkgInt32(res, 2, &sc->bst.cap) != 0) 278 goto end; 279 if (acpi_PkgInt32(res, 3, &sc->bst.volt) != 0) 280 goto end; 281 acpi_cmbat_info_updated(&sc->bst_lastupdated); 282 283 /* Clear out undefined/extended bits that might be set by hardware. */ 284 sc->bst.state &= ACPI_BATT_STAT_BST_MASK; 285 if ((sc->bst.state & ACPI_BATT_STAT_INVALID) == ACPI_BATT_STAT_INVALID) 286 ACPI_VPRINT(dev, acpi_device_get_parent_softc(dev), 287 "battery reports simultaneous charging and discharging\n"); 288 289 /* XXX If all batteries are critical, perhaps we should suspend. */ 290 if (sc->bst.state & ACPI_BATT_STAT_CRITICAL) { 291 if ((sc->flags & ACPI_BATT_STAT_CRITICAL) == 0) { 292 sc->flags |= ACPI_BATT_STAT_CRITICAL; 293 device_printf(dev, "critically low charge!\n"); 294 } 295 } else 296 sc->flags &= ~ACPI_BATT_STAT_CRITICAL; 297 298 end: 299 if (bst_buffer.Pointer != NULL) 300 AcpiOsFree(bst_buffer.Pointer); 301 } 302 303 /* XXX There should be a cleaner way to do this locking. */ 304 static void 305 acpi_cmbat_get_bif_task(void *arg) 306 { 307 308 ACPI_SERIAL_BEGIN(cmbat); 309 acpi_cmbat_get_bif(arg); 310 ACPI_SERIAL_END(cmbat); 311 } 312 313 static void 314 acpi_cmbat_get_bif(void *arg) 315 { 316 struct acpi_cmbat_softc *sc; 317 ACPI_STATUS as; 318 ACPI_OBJECT *res; 319 ACPI_HANDLE h; 320 ACPI_BUFFER bif_buffer; 321 device_t dev; 322 323 ACPI_SERIAL_ASSERT(cmbat); 324 325 dev = arg; 326 sc = device_get_softc(dev); 327 h = acpi_get_handle(dev); 328 bif_buffer.Pointer = NULL; 329 bif_buffer.Length = ACPI_ALLOCATE_BUFFER; 330 331 as = AcpiEvaluateObject(h, "_BIF", NULL, &bif_buffer); 332 if (ACPI_FAILURE(as)) { 333 ACPI_VPRINT(dev, acpi_device_get_parent_softc(dev), 334 "error fetching current battery info -- %s\n", 335 AcpiFormatException(as)); 336 goto end; 337 } 338 339 res = (ACPI_OBJECT *)bif_buffer.Pointer; 340 if (!ACPI_PKG_VALID(res, 13)) { 341 ACPI_VPRINT(dev, acpi_device_get_parent_softc(dev), 342 "battery info corrupted\n"); 343 goto end; 344 } 345 346 if (acpi_PkgInt32(res, 0, &sc->bif.units) != 0) 347 goto end; 348 if (acpi_PkgInt32(res, 1, &sc->bif.dcap) != 0) 349 goto end; 350 if (acpi_PkgInt32(res, 2, &sc->bif.lfcap) != 0) 351 goto end; 352 if (acpi_PkgInt32(res, 3, &sc->bif.btech) != 0) 353 goto end; 354 if (acpi_PkgInt32(res, 4, &sc->bif.dvol) != 0) 355 goto end; 356 if (acpi_PkgInt32(res, 5, &sc->bif.wcap) != 0) 357 goto end; 358 if (acpi_PkgInt32(res, 6, &sc->bif.lcap) != 0) 359 goto end; 360 if (acpi_PkgInt32(res, 7, &sc->bif.gra1) != 0) 361 goto end; 362 if (acpi_PkgInt32(res, 8, &sc->bif.gra2) != 0) 363 goto end; 364 if (acpi_PkgStr(res, 9, sc->bif.model, ACPI_CMBAT_MAXSTRLEN) != 0) 365 goto end; 366 if (acpi_PkgStr(res, 10, sc->bif.serial, ACPI_CMBAT_MAXSTRLEN) != 0) 367 goto end; 368 if (acpi_PkgStr(res, 11, sc->bif.type, ACPI_CMBAT_MAXSTRLEN) != 0) 369 goto end; 370 if (acpi_PkgStr(res, 12, sc->bif.oeminfo, ACPI_CMBAT_MAXSTRLEN) != 0) 371 goto end; 372 373 end: 374 if (bif_buffer.Pointer != NULL) 375 AcpiOsFree(bif_buffer.Pointer); 376 } 377 378 static int 379 acpi_cmbat_bif(device_t dev, struct acpi_bif *bifp) 380 { 381 struct acpi_cmbat_softc *sc; 382 383 sc = device_get_softc(dev); 384 385 /* 386 * Just copy the data. The only value that should change is the 387 * last-full capacity, so we only update when we get a notify that says 388 * the info has changed. Many systems apparently take a long time to 389 * process a _BIF call so we avoid it if possible. 390 */ 391 ACPI_SERIAL_BEGIN(cmbat); 392 bifp->units = sc->bif.units; 393 bifp->dcap = sc->bif.dcap; 394 bifp->lfcap = sc->bif.lfcap; 395 bifp->btech = sc->bif.btech; 396 bifp->dvol = sc->bif.dvol; 397 bifp->wcap = sc->bif.wcap; 398 bifp->lcap = sc->bif.lcap; 399 bifp->gra1 = sc->bif.gra1; 400 bifp->gra2 = sc->bif.gra2; 401 strncpy(bifp->model, sc->bif.model, sizeof(sc->bif.model)); 402 strncpy(bifp->serial, sc->bif.serial, sizeof(sc->bif.serial)); 403 strncpy(bifp->type, sc->bif.type, sizeof(sc->bif.type)); 404 strncpy(bifp->oeminfo, sc->bif.oeminfo, sizeof(sc->bif.oeminfo)); 405 ACPI_SERIAL_END(cmbat); 406 407 return (0); 408 } 409 410 static int 411 acpi_cmbat_bst(device_t dev, struct acpi_bst *bstp) 412 { 413 struct acpi_cmbat_softc *sc; 414 415 sc = device_get_softc(dev); 416 417 ACPI_SERIAL_BEGIN(cmbat); 418 if (acpi_BatteryIsPresent(dev)) { 419 acpi_cmbat_get_bst(dev); 420 bstp->state = sc->bst.state; 421 bstp->rate = sc->bst.rate; 422 bstp->cap = sc->bst.cap; 423 bstp->volt = sc->bst.volt; 424 } else 425 bstp->state = ACPI_BATT_STAT_NOT_PRESENT; 426 ACPI_SERIAL_END(cmbat); 427 428 return (0); 429 } 430 431 static void 432 acpi_cmbat_init_battery(void *arg) 433 { 434 struct acpi_cmbat_softc *sc; 435 int retry, valid; 436 device_t dev; 437 438 dev = (device_t)arg; 439 sc = device_get_softc(dev); 440 ACPI_VPRINT(dev, acpi_device_get_parent_softc(dev), 441 "battery initialization start\n"); 442 443 /* 444 * Try repeatedly to get valid data from the battery. Since the 445 * embedded controller isn't always ready just after boot, we may have 446 * to wait a while. 447 */ 448 for (retry = 0; retry < ACPI_CMBAT_RETRY_MAX; retry++, AcpiOsSleep(10000)) { 449 /* batteries on DOCK can be ejected w/ DOCK during retrying */ 450 if (!device_is_attached(dev)) 451 return; 452 453 if (!acpi_BatteryIsPresent(dev)) 454 continue; 455 456 /* 457 * Only query the battery if this is the first try or the specific 458 * type of info is still invalid. 459 */ 460 ACPI_SERIAL_BEGIN(cmbat); 461 if (retry == 0 || !acpi_battery_bst_valid(&sc->bst)) { 462 timespecclear(&sc->bst_lastupdated); 463 acpi_cmbat_get_bst(dev); 464 } 465 if (retry == 0 || !acpi_battery_bif_valid(&sc->bif)) 466 acpi_cmbat_get_bif(dev); 467 468 valid = acpi_battery_bst_valid(&sc->bst) && 469 acpi_battery_bif_valid(&sc->bif); 470 ACPI_SERIAL_END(cmbat); 471 472 if (valid) 473 break; 474 } 475 476 if (retry == ACPI_CMBAT_RETRY_MAX) { 477 ACPI_VPRINT(dev, acpi_device_get_parent_softc(dev), 478 "battery initialization failed, giving up\n"); 479 } else { 480 ACPI_VPRINT(dev, acpi_device_get_parent_softc(dev), 481 "battery initialization done, tried %d times\n", retry + 1); 482 } 483 } 484