| 1 | /* $NetBSD: acpi_bat.c,v 1.115 2015/04/23 23:23:00 pgoyette Exp $ */ |
| 2 | |
| 3 | /*- |
| 4 | * Copyright (c) 2003 The NetBSD Foundation, Inc. |
| 5 | * All rights reserved. |
| 6 | * |
| 7 | * This code is derived from software contributed to The NetBSD Foundation |
| 8 | * by Charles M. Hannum of By Noon Software, Inc. |
| 9 | * |
| 10 | * Redistribution and use in source and binary forms, with or without |
| 11 | * modification, are permitted provided that the following conditions |
| 12 | * are met: |
| 13 | * 1. Redistributions of source code must retain the above copyright |
| 14 | * notice, this list of conditions and the following disclaimer. |
| 15 | * 2. Redistributions in binary form must reproduce the above copyright |
| 16 | * notice, this list of conditions and the following disclaimer in the |
| 17 | * documentation and/or other materials provided with the distribution. |
| 18 | * |
| 19 | * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS |
| 20 | * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED |
| 21 | * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR |
| 22 | * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS |
| 23 | * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR |
| 24 | * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF |
| 25 | * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS |
| 26 | * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN |
| 27 | * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) |
| 28 | * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE |
| 29 | * POSSIBILITY OF SUCH DAMAGE. |
| 30 | */ |
| 31 | |
| 32 | /* |
| 33 | * Copyright 2001 Bill Sommerfeld. |
| 34 | * All rights reserved. |
| 35 | * |
| 36 | * Redistribution and use in source and binary forms, with or without |
| 37 | * modification, are permitted provided that the following conditions |
| 38 | * are met: |
| 39 | * 1. Redistributions of source code must retain the above copyright |
| 40 | * notice, this list of conditions and the following disclaimer. |
| 41 | * 2. Redistributions in binary form must reproduce the above copyright |
| 42 | * notice, this list of conditions and the following disclaimer in the |
| 43 | * documentation and/or other materials provided with the distribution. |
| 44 | * 3. All advertising materials mentioning features or use of this software |
| 45 | * must display the following acknowledgement: |
| 46 | * This product includes software developed for the NetBSD Project by |
| 47 | * Wasabi Systems, Inc. |
| 48 | * 4. The name of Wasabi Systems, Inc. may not be used to endorse |
| 49 | * or promote products derived from this software without specific prior |
| 50 | * written permission. |
| 51 | * |
| 52 | * THIS SOFTWARE IS PROVIDED BY WASABI SYSTEMS, INC. ``AS IS'' AND |
| 53 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED |
| 54 | * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR |
| 55 | * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL WASABI SYSTEMS, INC |
| 56 | * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR |
| 57 | * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF |
| 58 | * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS |
| 59 | * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN |
| 60 | * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) |
| 61 | * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE |
| 62 | * POSSIBILITY OF SUCH DAMAGE. |
| 63 | */ |
| 64 | |
| 65 | /* |
| 66 | * ACPI Battery Driver. |
| 67 | * |
| 68 | * ACPI defines two different battery device interfaces: "Control |
| 69 | * Method" batteries, in which AML methods are defined in order to get |
| 70 | * battery status and set battery alarm thresholds, and a "Smart |
| 71 | * Battery" device, which is an SMbus device accessed through the ACPI |
| 72 | * Embedded Controller device. |
| 73 | * |
| 74 | * This driver is for the "Control Method"-style battery only. |
| 75 | */ |
| 76 | |
| 77 | #include <sys/cdefs.h> |
| 78 | __KERNEL_RCSID(0, "$NetBSD: acpi_bat.c,v 1.115 2015/04/23 23:23:00 pgoyette Exp $" ); |
| 79 | |
| 80 | #include <sys/param.h> |
| 81 | #include <sys/condvar.h> |
| 82 | #include <sys/device.h> |
| 83 | #include <sys/kernel.h> |
| 84 | #include <sys/kmem.h> |
| 85 | #include <sys/module.h> |
| 86 | #include <sys/mutex.h> |
| 87 | #include <sys/systm.h> |
| 88 | |
| 89 | #include <dev/acpi/acpireg.h> |
| 90 | #include <dev/acpi/acpivar.h> |
| 91 | |
| 92 | #define _COMPONENT ACPI_BAT_COMPONENT |
| 93 | ACPI_MODULE_NAME ("acpi_bat" ) |
| 94 | |
| 95 | #define ACPI_NOTIFY_BAT_STATUS 0x80 |
| 96 | #define ACPI_NOTIFY_BAT_INFO 0x81 |
| 97 | |
| 98 | /* |
| 99 | * Sensor indexes. |
| 100 | */ |
| 101 | enum { |
| 102 | ACPIBAT_PRESENT = 0, |
| 103 | ACPIBAT_DVOLTAGE = 1, |
| 104 | ACPIBAT_VOLTAGE = 2, |
| 105 | ACPIBAT_DCAPACITY = 3, |
| 106 | ACPIBAT_LFCCAPACITY = 4, |
| 107 | ACPIBAT_CAPACITY = 5, |
| 108 | ACPIBAT_CHARGERATE = 6, |
| 109 | ACPIBAT_DISCHARGERATE = 7, |
| 110 | ACPIBAT_CHARGING = 8, |
| 111 | ACPIBAT_CHARGE_STATE = 9, |
| 112 | ACPIBAT_COUNT = 10 |
| 113 | }; |
| 114 | |
| 115 | /* |
| 116 | * Battery Information, _BIF |
| 117 | * (ACPI 3.0, sec. 10.2.2.1). |
| 118 | */ |
| 119 | enum { |
| 120 | ACPIBAT_BIF_UNIT = 0, |
| 121 | ACPIBAT_BIF_DCAPACITY = 1, |
| 122 | ACPIBAT_BIF_LFCCAPACITY = 2, |
| 123 | ACPIBAT_BIF_TECHNOLOGY = 3, |
| 124 | ACPIBAT_BIF_DVOLTAGE = 4, |
| 125 | ACPIBAT_BIF_WCAPACITY = 5, |
| 126 | ACPIBAT_BIF_LCAPACITY = 6, |
| 127 | ACPIBAT_BIF_GRANULARITY1 = 7, |
| 128 | ACPIBAT_BIF_GRANULARITY2 = 8, |
| 129 | ACPIBAT_BIF_MODEL = 9, |
| 130 | ACPIBAT_BIF_SERIAL = 10, |
| 131 | ACPIBAT_BIF_TYPE = 11, |
| 132 | ACPIBAT_BIF_OEM = 12, |
| 133 | ACPIBAT_BIF_COUNT = 13 |
| 134 | }; |
| 135 | |
| 136 | /* |
| 137 | * Battery Status, _BST |
| 138 | * (ACPI 3.0, sec. 10.2.2.3). |
| 139 | */ |
| 140 | enum { |
| 141 | ACPIBAT_BST_STATE = 0, |
| 142 | ACPIBAT_BST_RATE = 1, |
| 143 | ACPIBAT_BST_CAPACITY = 2, |
| 144 | ACPIBAT_BST_VOLTAGE = 3, |
| 145 | ACPIBAT_BST_COUNT = 4 |
| 146 | }; |
| 147 | |
| 148 | struct acpibat_softc { |
| 149 | struct acpi_devnode *sc_node; |
| 150 | struct sysmon_envsys *sc_sme; |
| 151 | struct timeval sc_last; |
| 152 | envsys_data_t *sc_sensor; |
| 153 | kmutex_t sc_mutex; |
| 154 | kcondvar_t sc_condvar; |
| 155 | int32_t sc_dcapacity; |
| 156 | int32_t sc_dvoltage; |
| 157 | int32_t sc_lcapacity; |
| 158 | int32_t sc_wcapacity; |
| 159 | int sc_present; |
| 160 | }; |
| 161 | |
| 162 | static const char * const bat_hid[] = { |
| 163 | "PNP0C0A" , |
| 164 | NULL |
| 165 | }; |
| 166 | |
| 167 | #define ACPIBAT_PWRUNIT_MA 0x00000001 /* mA not mW */ |
| 168 | #define ACPIBAT_ST_DISCHARGING 0x00000001 /* battery is discharging */ |
| 169 | #define ACPIBAT_ST_CHARGING 0x00000002 /* battery is charging */ |
| 170 | #define ACPIBAT_ST_CRITICAL 0x00000004 /* battery is critical */ |
| 171 | |
| 172 | /* |
| 173 | * A value used when _BST or _BIF is temporarily unknown. |
| 174 | */ |
| 175 | #define ACPIBAT_VAL_UNKNOWN 0xFFFFFFFF |
| 176 | |
| 177 | #define ACPIBAT_VAL_ISVALID(x) \ |
| 178 | (((x) != ACPIBAT_VAL_UNKNOWN) ? ENVSYS_SVALID : ENVSYS_SINVALID) |
| 179 | |
| 180 | static int acpibat_match(device_t, cfdata_t, void *); |
| 181 | static void acpibat_attach(device_t, device_t, void *); |
| 182 | static int acpibat_detach(device_t, int); |
| 183 | static int acpibat_get_sta(device_t); |
| 184 | static ACPI_OBJECT *acpibat_get_object(ACPI_HANDLE, const char *, uint32_t); |
| 185 | static void acpibat_get_info(device_t); |
| 186 | static void acpibat_print_info(device_t, ACPI_OBJECT *); |
| 187 | static void acpibat_get_status(device_t); |
| 188 | static void acpibat_update_info(void *); |
| 189 | static void acpibat_update_status(void *); |
| 190 | static void acpibat_init_envsys(device_t); |
| 191 | static void acpibat_notify_handler(ACPI_HANDLE, uint32_t, void *); |
| 192 | static void acpibat_refresh(struct sysmon_envsys *, envsys_data_t *); |
| 193 | static bool acpibat_resume(device_t, const pmf_qual_t *); |
| 194 | static void acpibat_get_limits(struct sysmon_envsys *, envsys_data_t *, |
| 195 | sysmon_envsys_lim_t *, uint32_t *); |
| 196 | |
| 197 | CFATTACH_DECL_NEW(acpibat, sizeof(struct acpibat_softc), |
| 198 | acpibat_match, acpibat_attach, acpibat_detach, NULL); |
| 199 | |
| 200 | /* |
| 201 | * acpibat_match: |
| 202 | * |
| 203 | * Autoconfiguration `match' routine. |
| 204 | */ |
| 205 | static int |
| 206 | acpibat_match(device_t parent, cfdata_t match, void *aux) |
| 207 | { |
| 208 | struct acpi_attach_args *aa = aux; |
| 209 | |
| 210 | if (aa->aa_node->ad_type != ACPI_TYPE_DEVICE) |
| 211 | return 0; |
| 212 | |
| 213 | return acpi_match_hid(aa->aa_node->ad_devinfo, bat_hid); |
| 214 | } |
| 215 | |
| 216 | /* |
| 217 | * acpibat_attach: |
| 218 | * |
| 219 | * Autoconfiguration `attach' routine. |
| 220 | */ |
| 221 | static void |
| 222 | acpibat_attach(device_t parent, device_t self, void *aux) |
| 223 | { |
| 224 | struct acpibat_softc *sc = device_private(self); |
| 225 | struct acpi_attach_args *aa = aux; |
| 226 | ACPI_HANDLE tmp; |
| 227 | ACPI_STATUS rv; |
| 228 | |
| 229 | aprint_naive(": ACPI Battery\n" ); |
| 230 | aprint_normal(": ACPI Battery\n" ); |
| 231 | |
| 232 | sc->sc_node = aa->aa_node; |
| 233 | |
| 234 | sc->sc_present = 0; |
| 235 | sc->sc_dvoltage = 0; |
| 236 | sc->sc_dcapacity = 0; |
| 237 | sc->sc_lcapacity = 0; |
| 238 | sc->sc_wcapacity = 0; |
| 239 | |
| 240 | sc->sc_sme = NULL; |
| 241 | sc->sc_sensor = NULL; |
| 242 | |
| 243 | mutex_init(&sc->sc_mutex, MUTEX_DEFAULT, IPL_NONE); |
| 244 | cv_init(&sc->sc_condvar, device_xname(self)); |
| 245 | |
| 246 | (void)pmf_device_register(self, NULL, acpibat_resume); |
| 247 | (void)acpi_register_notify(sc->sc_node, acpibat_notify_handler); |
| 248 | |
| 249 | sc->sc_sensor = kmem_zalloc(ACPIBAT_COUNT * |
| 250 | sizeof(*sc->sc_sensor), KM_SLEEP); |
| 251 | |
| 252 | if (sc->sc_sensor == NULL) |
| 253 | return; |
| 254 | |
| 255 | acpibat_init_envsys(self); |
| 256 | |
| 257 | /* |
| 258 | * If this is ever seen, the driver should be extended. |
| 259 | */ |
| 260 | rv = AcpiGetHandle(sc->sc_node->ad_handle, "_BIX" , &tmp); |
| 261 | |
| 262 | if (ACPI_SUCCESS(rv)) |
| 263 | aprint_verbose_dev(self, "ACPI 4.0 functionality present\n" ); |
| 264 | } |
| 265 | |
| 266 | /* |
| 267 | * acpibat_detach: |
| 268 | * |
| 269 | * Autoconfiguration `detach' routine. |
| 270 | */ |
| 271 | static int |
| 272 | acpibat_detach(device_t self, int flags) |
| 273 | { |
| 274 | struct acpibat_softc *sc = device_private(self); |
| 275 | |
| 276 | acpi_deregister_notify(sc->sc_node); |
| 277 | |
| 278 | cv_destroy(&sc->sc_condvar); |
| 279 | mutex_destroy(&sc->sc_mutex); |
| 280 | |
| 281 | if (sc->sc_sme != NULL) |
| 282 | sysmon_envsys_unregister(sc->sc_sme); |
| 283 | |
| 284 | if (sc->sc_sensor != NULL) |
| 285 | kmem_free(sc->sc_sensor, ACPIBAT_COUNT * |
| 286 | sizeof(*sc->sc_sensor)); |
| 287 | |
| 288 | pmf_device_deregister(self); |
| 289 | |
| 290 | return 0; |
| 291 | } |
| 292 | |
| 293 | /* |
| 294 | * acpibat_get_sta: |
| 295 | * |
| 296 | * Evaluate whether the battery is present or absent. |
| 297 | * |
| 298 | * Returns: 0 for no battery, 1 for present, and -1 on error. |
| 299 | */ |
| 300 | static int |
| 301 | acpibat_get_sta(device_t dv) |
| 302 | { |
| 303 | struct acpibat_softc *sc = device_private(dv); |
| 304 | ACPI_INTEGER val; |
| 305 | ACPI_STATUS rv; |
| 306 | |
| 307 | rv = acpi_eval_integer(sc->sc_node->ad_handle, "_STA" , &val); |
| 308 | |
| 309 | if (ACPI_FAILURE(rv)) { |
| 310 | aprint_error_dev(dv, "failed to evaluate _STA\n" ); |
| 311 | return -1; |
| 312 | } |
| 313 | |
| 314 | sc->sc_sensor[ACPIBAT_PRESENT].state = ENVSYS_SVALID; |
| 315 | |
| 316 | if ((val & ACPI_STA_BATTERY_PRESENT) == 0) { |
| 317 | sc->sc_sensor[ACPIBAT_PRESENT].value_cur = 0; |
| 318 | return 0; |
| 319 | } |
| 320 | |
| 321 | sc->sc_sensor[ACPIBAT_PRESENT].value_cur = 1; |
| 322 | |
| 323 | return 1; |
| 324 | } |
| 325 | |
| 326 | static ACPI_OBJECT * |
| 327 | acpibat_get_object(ACPI_HANDLE hdl, const char *pth, uint32_t count) |
| 328 | { |
| 329 | ACPI_OBJECT *obj; |
| 330 | ACPI_BUFFER buf; |
| 331 | ACPI_STATUS rv; |
| 332 | |
| 333 | rv = acpi_eval_struct(hdl, pth, &buf); |
| 334 | |
| 335 | if (ACPI_FAILURE(rv)) |
| 336 | return NULL; |
| 337 | |
| 338 | obj = buf.Pointer; |
| 339 | |
| 340 | if (obj->Type != ACPI_TYPE_PACKAGE) { |
| 341 | ACPI_FREE(buf.Pointer); |
| 342 | return NULL; |
| 343 | } |
| 344 | |
| 345 | if (obj->Package.Count != count) { |
| 346 | ACPI_FREE(buf.Pointer); |
| 347 | return NULL; |
| 348 | } |
| 349 | |
| 350 | return obj; |
| 351 | } |
| 352 | |
| 353 | /* |
| 354 | * acpibat_get_info: |
| 355 | * |
| 356 | * Get the battery info. |
| 357 | */ |
| 358 | static void |
| 359 | acpibat_get_info(device_t dv) |
| 360 | { |
| 361 | struct acpibat_softc *sc = device_private(dv); |
| 362 | ACPI_HANDLE hdl = sc->sc_node->ad_handle; |
| 363 | ACPI_OBJECT *elm, *obj; |
| 364 | ACPI_STATUS rv = AE_OK; |
| 365 | int capunit, i, rateunit; |
| 366 | uint64_t val; |
| 367 | |
| 368 | obj = acpibat_get_object(hdl, "_BIF" , ACPIBAT_BIF_COUNT); |
| 369 | |
| 370 | if (obj == NULL) { |
| 371 | rv = AE_ERROR; |
| 372 | goto out; |
| 373 | } |
| 374 | |
| 375 | elm = obj->Package.Elements; |
| 376 | |
| 377 | for (i = ACPIBAT_BIF_UNIT; i < ACPIBAT_BIF_MODEL; i++) { |
| 378 | |
| 379 | if (elm[i].Type != ACPI_TYPE_INTEGER) { |
| 380 | rv = AE_TYPE; |
| 381 | goto out; |
| 382 | } |
| 383 | |
| 384 | if (elm[i].Integer.Value != ACPIBAT_VAL_UNKNOWN && |
| 385 | elm[i].Integer.Value >= INT_MAX) { |
| 386 | rv = AE_LIMIT; |
| 387 | goto out; |
| 388 | } |
| 389 | } |
| 390 | |
| 391 | switch (elm[ACPIBAT_BIF_UNIT].Integer.Value) { |
| 392 | case ACPIBAT_PWRUNIT_MA: |
| 393 | capunit = ENVSYS_SAMPHOUR; |
| 394 | rateunit = ENVSYS_SAMPS; |
| 395 | break; |
| 396 | default: |
| 397 | capunit = ENVSYS_SWATTHOUR; |
| 398 | rateunit = ENVSYS_SWATTS; |
| 399 | break; |
| 400 | } |
| 401 | |
| 402 | sc->sc_sensor[ACPIBAT_DCAPACITY].units = capunit; |
| 403 | sc->sc_sensor[ACPIBAT_LFCCAPACITY].units = capunit; |
| 404 | sc->sc_sensor[ACPIBAT_CHARGERATE].units = rateunit; |
| 405 | sc->sc_sensor[ACPIBAT_DISCHARGERATE].units = rateunit; |
| 406 | sc->sc_sensor[ACPIBAT_CAPACITY].units = capunit; |
| 407 | |
| 408 | /* Design capacity. */ |
| 409 | val = elm[ACPIBAT_BIF_DCAPACITY].Integer.Value; |
| 410 | sc->sc_sensor[ACPIBAT_DCAPACITY].value_cur = val * 1000; |
| 411 | sc->sc_sensor[ACPIBAT_DCAPACITY].state = ACPIBAT_VAL_ISVALID(val); |
| 412 | |
| 413 | /* Last full charge capacity. */ |
| 414 | val = elm[ACPIBAT_BIF_LFCCAPACITY].Integer.Value; |
| 415 | sc->sc_sensor[ACPIBAT_LFCCAPACITY].value_cur = val * 1000; |
| 416 | sc->sc_sensor[ACPIBAT_LFCCAPACITY].state = ACPIBAT_VAL_ISVALID(val); |
| 417 | |
| 418 | /* Design voltage. */ |
| 419 | val = elm[ACPIBAT_BIF_DVOLTAGE].Integer.Value; |
| 420 | sc->sc_sensor[ACPIBAT_DVOLTAGE].value_cur = val * 1000; |
| 421 | sc->sc_sensor[ACPIBAT_DVOLTAGE].state = ACPIBAT_VAL_ISVALID(val); |
| 422 | |
| 423 | /* Design low and warning capacity. */ |
| 424 | sc->sc_lcapacity = elm[ACPIBAT_BIF_LCAPACITY].Integer.Value * 1000; |
| 425 | sc->sc_wcapacity = elm[ACPIBAT_BIF_WCAPACITY].Integer.Value * 1000; |
| 426 | |
| 427 | /* |
| 428 | * Initialize the maximum of current capacity |
| 429 | * to the last known full charge capacity. |
| 430 | */ |
| 431 | val = sc->sc_sensor[ACPIBAT_LFCCAPACITY].value_cur; |
| 432 | sc->sc_sensor[ACPIBAT_CAPACITY].value_max = val; |
| 433 | |
| 434 | acpibat_print_info(dv, elm); |
| 435 | |
| 436 | out: |
| 437 | if (obj != NULL) |
| 438 | ACPI_FREE(obj); |
| 439 | |
| 440 | if (ACPI_FAILURE(rv)) |
| 441 | aprint_error_dev(dv, "failed to evaluate _BIF: %s\n" , |
| 442 | AcpiFormatException(rv)); |
| 443 | } |
| 444 | |
| 445 | /* |
| 446 | * acpibat_print_info: |
| 447 | * |
| 448 | * Display the battery info. |
| 449 | */ |
| 450 | static void |
| 451 | acpibat_print_info(device_t dv, ACPI_OBJECT *elm) |
| 452 | { |
| 453 | struct acpibat_softc *sc = device_private(dv); |
| 454 | const char *tech, *unit; |
| 455 | int32_t dcap, dvol; |
| 456 | int i; |
| 457 | |
| 458 | for (i = ACPIBAT_BIF_OEM; i > ACPIBAT_BIF_GRANULARITY2; i--) { |
| 459 | |
| 460 | if (elm[i].Type != ACPI_TYPE_STRING) |
| 461 | return; |
| 462 | |
| 463 | if (elm[i].String.Pointer == NULL) |
| 464 | return; |
| 465 | |
| 466 | if (elm[i].String.Pointer[0] == '\0') |
| 467 | return; |
| 468 | } |
| 469 | |
| 470 | dcap = elm[ACPIBAT_BIF_DCAPACITY].Integer.Value; |
| 471 | dvol = elm[ACPIBAT_BIF_DVOLTAGE].Integer.Value; |
| 472 | |
| 473 | /* |
| 474 | * Try to detect whether the battery was switched. |
| 475 | */ |
| 476 | if (sc->sc_dcapacity == dcap && sc->sc_dvoltage == dvol) |
| 477 | return; |
| 478 | else { |
| 479 | sc->sc_dcapacity = dcap; |
| 480 | sc->sc_dvoltage = dvol; |
| 481 | } |
| 482 | |
| 483 | tech = (elm[ACPIBAT_BIF_TECHNOLOGY].Integer.Value != 0) ? |
| 484 | "rechargeable" : "non-rechargeable" ; |
| 485 | |
| 486 | aprint_normal_dev(dv, "%s %s %s battery\n" , |
| 487 | elm[ACPIBAT_BIF_OEM].String.Pointer, |
| 488 | elm[ACPIBAT_BIF_TYPE].String.Pointer, tech); |
| 489 | |
| 490 | aprint_debug_dev(dv, "model number %s, serial number %s\n" , |
| 491 | elm[ACPIBAT_BIF_MODEL].String.Pointer, |
| 492 | elm[ACPIBAT_BIF_SERIAL].String.Pointer); |
| 493 | |
| 494 | #define SCALE(x) (((int)x) / 1000000), ((((int)x) % 1000000) / 1000) |
| 495 | |
| 496 | /* |
| 497 | * These values are defined as follows (ACPI 4.0, p. 388): |
| 498 | * |
| 499 | * Granularity 1. "Battery capacity granularity between low |
| 500 | * and warning in [mAh] or [mWh]. That is, |
| 501 | * this is the smallest increment in capacity |
| 502 | * that the battery is capable of measuring." |
| 503 | * |
| 504 | * Granularity 2. "Battery capacity granularity between warning |
| 505 | * and full in [mAh] or [mWh]. [...]" |
| 506 | */ |
| 507 | switch (elm[ACPIBAT_BIF_UNIT].Integer.Value) { |
| 508 | case ACPIBAT_PWRUNIT_MA: |
| 509 | unit = "Ah" ; |
| 510 | break; |
| 511 | default: |
| 512 | unit = "Wh" ; |
| 513 | break; |
| 514 | } |
| 515 | |
| 516 | aprint_verbose_dev(dv, "granularity: " |
| 517 | "low->warn %d.%03d %s, warn->full %d.%03d %s\n" , |
| 518 | SCALE(elm[ACPIBAT_BIF_GRANULARITY1].Integer.Value * 1000), unit, |
| 519 | SCALE(elm[ACPIBAT_BIF_GRANULARITY2].Integer.Value * 1000), unit); |
| 520 | } |
| 521 | |
| 522 | /* |
| 523 | * acpibat_get_status: |
| 524 | * |
| 525 | * Get the current battery status. |
| 526 | */ |
| 527 | static void |
| 528 | acpibat_get_status(device_t dv) |
| 529 | { |
| 530 | struct acpibat_softc *sc = device_private(dv); |
| 531 | ACPI_HANDLE hdl = sc->sc_node->ad_handle; |
| 532 | ACPI_OBJECT *elm, *obj; |
| 533 | ACPI_STATUS rv = AE_OK; |
| 534 | int i, rate, state; |
| 535 | uint64_t val; |
| 536 | |
| 537 | obj = acpibat_get_object(hdl, "_BST" , ACPIBAT_BST_COUNT); |
| 538 | |
| 539 | if (obj == NULL) { |
| 540 | rv = AE_ERROR; |
| 541 | goto out; |
| 542 | } |
| 543 | |
| 544 | elm = obj->Package.Elements; |
| 545 | |
| 546 | for (i = ACPIBAT_BST_STATE; i < ACPIBAT_BST_COUNT; i++) { |
| 547 | |
| 548 | if (elm[i].Type != ACPI_TYPE_INTEGER) { |
| 549 | rv = AE_TYPE; |
| 550 | goto out; |
| 551 | } |
| 552 | } |
| 553 | |
| 554 | state = elm[ACPIBAT_BST_STATE].Integer.Value; |
| 555 | |
| 556 | if ((state & ACPIBAT_ST_CHARGING) != 0) { |
| 557 | /* XXX rate can be invalid */ |
| 558 | rate = elm[ACPIBAT_BST_RATE].Integer.Value; |
| 559 | sc->sc_sensor[ACPIBAT_CHARGERATE].state = ENVSYS_SVALID; |
| 560 | sc->sc_sensor[ACPIBAT_CHARGERATE].value_cur = rate * 1000; |
| 561 | sc->sc_sensor[ACPIBAT_DISCHARGERATE].state = ENVSYS_SINVALID; |
| 562 | sc->sc_sensor[ACPIBAT_CHARGING].state = ENVSYS_SVALID; |
| 563 | sc->sc_sensor[ACPIBAT_CHARGING].value_cur = 1; |
| 564 | } else if ((state & ACPIBAT_ST_DISCHARGING) != 0) { |
| 565 | rate = elm[ACPIBAT_BST_RATE].Integer.Value; |
| 566 | sc->sc_sensor[ACPIBAT_DISCHARGERATE].state = ENVSYS_SVALID; |
| 567 | sc->sc_sensor[ACPIBAT_DISCHARGERATE].value_cur = rate * 1000; |
| 568 | sc->sc_sensor[ACPIBAT_CHARGERATE].state = ENVSYS_SINVALID; |
| 569 | sc->sc_sensor[ACPIBAT_CHARGING].state = ENVSYS_SVALID; |
| 570 | sc->sc_sensor[ACPIBAT_CHARGING].value_cur = 0; |
| 571 | } else { |
| 572 | sc->sc_sensor[ACPIBAT_CHARGING].state = ENVSYS_SVALID; |
| 573 | sc->sc_sensor[ACPIBAT_CHARGING].value_cur = 0; |
| 574 | sc->sc_sensor[ACPIBAT_CHARGERATE].state = ENVSYS_SINVALID; |
| 575 | sc->sc_sensor[ACPIBAT_DISCHARGERATE].state = ENVSYS_SINVALID; |
| 576 | } |
| 577 | |
| 578 | /* Remaining capacity. */ |
| 579 | val = elm[ACPIBAT_BST_CAPACITY].Integer.Value; |
| 580 | sc->sc_sensor[ACPIBAT_CAPACITY].value_cur = val * 1000; |
| 581 | sc->sc_sensor[ACPIBAT_CAPACITY].state = ACPIBAT_VAL_ISVALID(val); |
| 582 | |
| 583 | /* Battery voltage. */ |
| 584 | val = elm[ACPIBAT_BST_VOLTAGE].Integer.Value; |
| 585 | sc->sc_sensor[ACPIBAT_VOLTAGE].value_cur = val * 1000; |
| 586 | sc->sc_sensor[ACPIBAT_VOLTAGE].state = ACPIBAT_VAL_ISVALID(val); |
| 587 | |
| 588 | sc->sc_sensor[ACPIBAT_CHARGE_STATE].state = ENVSYS_SVALID; |
| 589 | sc->sc_sensor[ACPIBAT_CHARGE_STATE].value_cur = |
| 590 | ENVSYS_BATTERY_CAPACITY_NORMAL; |
| 591 | |
| 592 | if (sc->sc_sensor[ACPIBAT_CAPACITY].value_cur < sc->sc_wcapacity) { |
| 593 | sc->sc_sensor[ACPIBAT_CAPACITY].state = ENVSYS_SWARNUNDER; |
| 594 | sc->sc_sensor[ACPIBAT_CHARGE_STATE].value_cur = |
| 595 | ENVSYS_BATTERY_CAPACITY_WARNING; |
| 596 | } |
| 597 | |
| 598 | if (sc->sc_sensor[ACPIBAT_CAPACITY].value_cur < sc->sc_lcapacity) { |
| 599 | sc->sc_sensor[ACPIBAT_CAPACITY].state = ENVSYS_SCRITUNDER; |
| 600 | sc->sc_sensor[ACPIBAT_CHARGE_STATE].value_cur = |
| 601 | ENVSYS_BATTERY_CAPACITY_LOW; |
| 602 | } |
| 603 | |
| 604 | if ((state & ACPIBAT_ST_CRITICAL) != 0) { |
| 605 | sc->sc_sensor[ACPIBAT_CAPACITY].state = ENVSYS_SCRITICAL; |
| 606 | sc->sc_sensor[ACPIBAT_CHARGE_STATE].value_cur = |
| 607 | ENVSYS_BATTERY_CAPACITY_CRITICAL; |
| 608 | } |
| 609 | |
| 610 | out: |
| 611 | if (obj != NULL) |
| 612 | ACPI_FREE(obj); |
| 613 | |
| 614 | if (ACPI_FAILURE(rv)) |
| 615 | aprint_error_dev(dv, "failed to evaluate _BST: %s\n" , |
| 616 | AcpiFormatException(rv)); |
| 617 | } |
| 618 | |
| 619 | static void |
| 620 | acpibat_update_info(void *arg) |
| 621 | { |
| 622 | device_t dv = arg; |
| 623 | struct acpibat_softc *sc = device_private(dv); |
| 624 | int i, rv; |
| 625 | |
| 626 | mutex_enter(&sc->sc_mutex); |
| 627 | |
| 628 | rv = acpibat_get_sta(dv); |
| 629 | |
| 630 | if (rv > 0) { |
| 631 | acpibat_get_info(dv); |
| 632 | |
| 633 | /* |
| 634 | * If the status changed, update the limits. |
| 635 | */ |
| 636 | if (sc->sc_present == 0 && |
| 637 | sc->sc_sensor[ACPIBAT_CAPACITY].value_max > 0) |
| 638 | sysmon_envsys_update_limits(sc->sc_sme, |
| 639 | &sc->sc_sensor[ACPIBAT_CAPACITY]); |
| 640 | } else { |
| 641 | i = (rv < 0) ? 0 : ACPIBAT_DVOLTAGE; |
| 642 | |
| 643 | while (i < ACPIBAT_COUNT) { |
| 644 | sc->sc_sensor[i].state = ENVSYS_SINVALID; |
| 645 | i++; |
| 646 | } |
| 647 | } |
| 648 | |
| 649 | sc->sc_present = rv; |
| 650 | |
| 651 | mutex_exit(&sc->sc_mutex); |
| 652 | } |
| 653 | |
| 654 | static void |
| 655 | acpibat_update_status(void *arg) |
| 656 | { |
| 657 | device_t dv = arg; |
| 658 | struct acpibat_softc *sc = device_private(dv); |
| 659 | int i, rv; |
| 660 | |
| 661 | mutex_enter(&sc->sc_mutex); |
| 662 | |
| 663 | rv = acpibat_get_sta(dv); |
| 664 | |
| 665 | if (rv > 0) { |
| 666 | |
| 667 | if (sc->sc_present == 0) |
| 668 | acpibat_get_info(dv); |
| 669 | |
| 670 | acpibat_get_status(dv); |
| 671 | } else { |
| 672 | i = (rv < 0) ? 0 : ACPIBAT_DVOLTAGE; |
| 673 | |
| 674 | while (i < ACPIBAT_COUNT) { |
| 675 | sc->sc_sensor[i].state = ENVSYS_SINVALID; |
| 676 | i++; |
| 677 | } |
| 678 | } |
| 679 | |
| 680 | sc->sc_present = rv; |
| 681 | microtime(&sc->sc_last); |
| 682 | |
| 683 | cv_broadcast(&sc->sc_condvar); |
| 684 | mutex_exit(&sc->sc_mutex); |
| 685 | } |
| 686 | |
| 687 | /* |
| 688 | * acpibat_notify_handler: |
| 689 | * |
| 690 | * Callback from ACPI interrupt handler to notify us of an event. |
| 691 | */ |
| 692 | static void |
| 693 | acpibat_notify_handler(ACPI_HANDLE handle, uint32_t notify, void *context) |
| 694 | { |
| 695 | static const int handler = OSL_NOTIFY_HANDLER; |
| 696 | device_t dv = context; |
| 697 | |
| 698 | switch (notify) { |
| 699 | |
| 700 | case ACPI_NOTIFY_BUS_CHECK: |
| 701 | break; |
| 702 | |
| 703 | case ACPI_NOTIFY_BAT_INFO: |
| 704 | case ACPI_NOTIFY_DEVICE_CHECK: |
| 705 | (void)AcpiOsExecute(handler, acpibat_update_info, dv); |
| 706 | break; |
| 707 | |
| 708 | case ACPI_NOTIFY_BAT_STATUS: |
| 709 | (void)AcpiOsExecute(handler, acpibat_update_status, dv); |
| 710 | break; |
| 711 | |
| 712 | default: |
| 713 | aprint_error_dev(dv, "unknown notify: 0x%02X\n" , notify); |
| 714 | } |
| 715 | } |
| 716 | |
| 717 | static void |
| 718 | acpibat_init_envsys(device_t dv) |
| 719 | { |
| 720 | struct acpibat_softc *sc = device_private(dv); |
| 721 | int i; |
| 722 | |
| 723 | #define INITDATA(index, unit, string) \ |
| 724 | do { \ |
| 725 | sc->sc_sensor[index].state = ENVSYS_SVALID; \ |
| 726 | sc->sc_sensor[index].units = unit; \ |
| 727 | (void)strlcpy(sc->sc_sensor[index].desc, string, \ |
| 728 | sizeof(sc->sc_sensor[index].desc)); \ |
| 729 | } while (/* CONSTCOND */ 0) |
| 730 | |
| 731 | INITDATA(ACPIBAT_PRESENT, ENVSYS_INDICATOR, "present" ); |
| 732 | INITDATA(ACPIBAT_DCAPACITY, ENVSYS_SWATTHOUR, "design cap" ); |
| 733 | INITDATA(ACPIBAT_LFCCAPACITY, ENVSYS_SWATTHOUR, "last full cap" ); |
| 734 | INITDATA(ACPIBAT_DVOLTAGE, ENVSYS_SVOLTS_DC, "design voltage" ); |
| 735 | INITDATA(ACPIBAT_VOLTAGE, ENVSYS_SVOLTS_DC, "voltage" ); |
| 736 | INITDATA(ACPIBAT_CHARGERATE, ENVSYS_SWATTS, "charge rate" ); |
| 737 | INITDATA(ACPIBAT_DISCHARGERATE, ENVSYS_SWATTS, "discharge rate" ); |
| 738 | INITDATA(ACPIBAT_CAPACITY, ENVSYS_SWATTHOUR, "charge" ); |
| 739 | INITDATA(ACPIBAT_CHARGING, ENVSYS_BATTERY_CHARGE, "charging" ); |
| 740 | INITDATA(ACPIBAT_CHARGE_STATE, ENVSYS_BATTERY_CAPACITY, "charge state" ); |
| 741 | |
| 742 | #undef INITDATA |
| 743 | |
| 744 | sc->sc_sensor[ACPIBAT_CHARGE_STATE].value_cur = |
| 745 | ENVSYS_BATTERY_CAPACITY_NORMAL; |
| 746 | |
| 747 | sc->sc_sensor[ACPIBAT_CAPACITY].flags |= |
| 748 | ENVSYS_FPERCENT | ENVSYS_FVALID_MAX | ENVSYS_FMONLIMITS; |
| 749 | |
| 750 | sc->sc_sensor[ACPIBAT_CHARGE_STATE].flags |= ENVSYS_FMONSTCHANGED; |
| 751 | |
| 752 | /* Disable userland monitoring on these sensors. */ |
| 753 | sc->sc_sensor[ACPIBAT_VOLTAGE].flags = ENVSYS_FMONNOTSUPP; |
| 754 | sc->sc_sensor[ACPIBAT_CHARGERATE].flags = ENVSYS_FMONNOTSUPP; |
| 755 | sc->sc_sensor[ACPIBAT_DISCHARGERATE].flags = ENVSYS_FMONNOTSUPP; |
| 756 | sc->sc_sensor[ACPIBAT_DCAPACITY].flags = ENVSYS_FMONNOTSUPP; |
| 757 | sc->sc_sensor[ACPIBAT_LFCCAPACITY].flags = ENVSYS_FMONNOTSUPP; |
| 758 | sc->sc_sensor[ACPIBAT_DVOLTAGE].flags = ENVSYS_FMONNOTSUPP; |
| 759 | |
| 760 | /* Attach rnd(9) to the (dis)charge rates. */ |
| 761 | sc->sc_sensor[ACPIBAT_CHARGERATE].flags |= ENVSYS_FHAS_ENTROPY; |
| 762 | sc->sc_sensor[ACPIBAT_DISCHARGERATE].flags |= ENVSYS_FHAS_ENTROPY; |
| 763 | |
| 764 | sc->sc_sme = sysmon_envsys_create(); |
| 765 | |
| 766 | for (i = 0; i < ACPIBAT_COUNT; i++) { |
| 767 | |
| 768 | if (sysmon_envsys_sensor_attach(sc->sc_sme, |
| 769 | &sc->sc_sensor[i])) |
| 770 | goto fail; |
| 771 | } |
| 772 | |
| 773 | sc->sc_sme->sme_name = device_xname(dv); |
| 774 | sc->sc_sme->sme_cookie = dv; |
| 775 | sc->sc_sme->sme_refresh = acpibat_refresh; |
| 776 | sc->sc_sme->sme_class = SME_CLASS_BATTERY; |
| 777 | sc->sc_sme->sme_flags = SME_POLL_ONLY | SME_INIT_REFRESH; |
| 778 | sc->sc_sme->sme_get_limits = acpibat_get_limits; |
| 779 | |
| 780 | acpibat_update_info(dv); |
| 781 | acpibat_update_status(dv); |
| 782 | |
| 783 | if (sysmon_envsys_register(sc->sc_sme)) |
| 784 | goto fail; |
| 785 | |
| 786 | return; |
| 787 | |
| 788 | fail: |
| 789 | aprint_error_dev(dv, "failed to initialize sysmon\n" ); |
| 790 | |
| 791 | sysmon_envsys_destroy(sc->sc_sme); |
| 792 | kmem_free(sc->sc_sensor, ACPIBAT_COUNT * sizeof(*sc->sc_sensor)); |
| 793 | |
| 794 | sc->sc_sme = NULL; |
| 795 | sc->sc_sensor = NULL; |
| 796 | } |
| 797 | |
| 798 | static void |
| 799 | acpibat_refresh(struct sysmon_envsys *sme, envsys_data_t *edata) |
| 800 | { |
| 801 | device_t self = sme->sme_cookie; |
| 802 | struct acpibat_softc *sc; |
| 803 | struct timeval tv, tmp; |
| 804 | ACPI_STATUS rv; |
| 805 | |
| 806 | sc = device_private(self); |
| 807 | |
| 808 | tmp.tv_sec = 10; |
| 809 | tmp.tv_usec = 0; |
| 810 | |
| 811 | microtime(&tv); |
| 812 | timersub(&tv, &tmp, &tv); |
| 813 | |
| 814 | if (timercmp(&tv, &sc->sc_last, <) != 0) |
| 815 | return; |
| 816 | |
| 817 | if (mutex_tryenter(&sc->sc_mutex) == 0) |
| 818 | return; |
| 819 | |
| 820 | rv = AcpiOsExecute(OSL_NOTIFY_HANDLER, acpibat_update_status, self); |
| 821 | |
| 822 | if (ACPI_SUCCESS(rv)) |
| 823 | cv_timedwait(&sc->sc_condvar, &sc->sc_mutex, hz); |
| 824 | |
| 825 | mutex_exit(&sc->sc_mutex); |
| 826 | } |
| 827 | |
| 828 | static bool |
| 829 | acpibat_resume(device_t dv, const pmf_qual_t *qual) |
| 830 | { |
| 831 | |
| 832 | (void)AcpiOsExecute(OSL_NOTIFY_HANDLER, acpibat_update_info, dv); |
| 833 | (void)AcpiOsExecute(OSL_NOTIFY_HANDLER, acpibat_update_status, dv); |
| 834 | |
| 835 | return true; |
| 836 | } |
| 837 | |
| 838 | static void |
| 839 | acpibat_get_limits(struct sysmon_envsys *sme, envsys_data_t *edata, |
| 840 | sysmon_envsys_lim_t *limits, uint32_t *props) |
| 841 | { |
| 842 | device_t dv = sme->sme_cookie; |
| 843 | struct acpibat_softc *sc = device_private(dv); |
| 844 | |
| 845 | if (edata->sensor != ACPIBAT_CAPACITY) |
| 846 | return; |
| 847 | |
| 848 | limits->sel_critmin = sc->sc_lcapacity; |
| 849 | limits->sel_warnmin = sc->sc_wcapacity; |
| 850 | |
| 851 | *props |= PROP_BATTCAP | PROP_BATTWARN | PROP_DRIVER_LIMITS; |
| 852 | } |
| 853 | |
| 854 | MODULE(MODULE_CLASS_DRIVER, acpibat, "sysmon_envsys" ); |
| 855 | |
| 856 | #ifdef _MODULE |
| 857 | #include "ioconf.c" |
| 858 | #endif |
| 859 | |
| 860 | static int |
| 861 | acpibat_modcmd(modcmd_t cmd, void *aux) |
| 862 | { |
| 863 | int rv = 0; |
| 864 | |
| 865 | switch (cmd) { |
| 866 | |
| 867 | case MODULE_CMD_INIT: |
| 868 | |
| 869 | #ifdef _MODULE |
| 870 | rv = config_init_component(cfdriver_ioconf_acpibat, |
| 871 | cfattach_ioconf_acpibat, cfdata_ioconf_acpibat); |
| 872 | #endif |
| 873 | break; |
| 874 | |
| 875 | case MODULE_CMD_FINI: |
| 876 | |
| 877 | #ifdef _MODULE |
| 878 | rv = config_fini_component(cfdriver_ioconf_acpibat, |
| 879 | cfattach_ioconf_acpibat, cfdata_ioconf_acpibat); |
| 880 | #endif |
| 881 | break; |
| 882 | |
| 883 | default: |
| 884 | rv = ENOTTY; |
| 885 | } |
| 886 | |
| 887 | return rv; |
| 888 | } |
| 889 | |