1/* 2 * sbs.c - ACPI Smart Battery System Driver ($Revision: 2.0 $) 3 * 4 * Copyright (c) 2007 Alexey Starikovskiy <astarikovskiy@suse.de> 5 * Copyright (c) 2005-2007 Vladimir Lebedev <vladimir.p.lebedev@intel.com> 6 * Copyright (c) 2005 Rich Townsend <rhdt@bartol.udel.edu> 7 * 8 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ 9 * 10 * This program is free software; you can redistribute it and/or modify 11 * it under the terms of the GNU General Public License as published by 12 * the Free Software Foundation; either version 2 of the License, or (at 13 * your option) any later version. 14 * 15 * This program is distributed in the hope that it will be useful, but 16 * WITHOUT ANY WARRANTY; without even the implied warranty of 17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 18 * General Public License for more details. 19 * 20 * You should have received a copy of the GNU General Public License along 21 * with this program; if not, write to the Free Software Foundation, Inc., 22 * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA. 23 * 24 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ 25 */ 26 27#include <linux/init.h> 28#include <linux/slab.h> 29#include <linux/module.h> 30#include <linux/moduleparam.h> 31#include <linux/kernel.h> 32 33#include <linux/acpi.h> 34#include <linux/timer.h> 35#include <linux/jiffies.h> 36#include <linux/delay.h> 37#include <linux/power_supply.h> 38#include <linux/dmi.h> 39 40#include "sbshc.h" 41#include "battery.h" 42 43#define PREFIX "ACPI: " 44 45#define ACPI_SBS_CLASS "sbs" 46#define ACPI_AC_CLASS "ac_adapter" 47#define ACPI_SBS_DEVICE_NAME "Smart Battery System" 48#define ACPI_SBS_FILE_INFO "info" 49#define ACPI_SBS_FILE_STATE "state" 50#define ACPI_SBS_FILE_ALARM "alarm" 51#define ACPI_BATTERY_DIR_NAME "BAT%i" 52#define ACPI_AC_DIR_NAME "AC0" 53 54#define ACPI_SBS_NOTIFY_STATUS 0x80 55#define ACPI_SBS_NOTIFY_INFO 0x81 56 57MODULE_AUTHOR("Alexey Starikovskiy <astarikovskiy@suse.de>"); 58MODULE_DESCRIPTION("Smart Battery System ACPI interface driver"); 59MODULE_LICENSE("GPL"); 60 61static unsigned int cache_time = 1000; 62module_param(cache_time, uint, 0644); 63MODULE_PARM_DESC(cache_time, "cache time in milliseconds"); 64 65static bool sbs_manager_broken; 66 67#define MAX_SBS_BAT 4 68#define ACPI_SBS_BLOCK_MAX 32 69 70static const struct acpi_device_id sbs_device_ids[] = { 71 {"ACPI0002", 0}, 72 {"", 0}, 73}; 74MODULE_DEVICE_TABLE(acpi, sbs_device_ids); 75 76struct acpi_battery { 77 struct power_supply *bat; 78 struct power_supply_desc bat_desc; 79 struct acpi_sbs *sbs; 80 unsigned long update_time; 81 char name[8]; 82 char manufacturer_name[ACPI_SBS_BLOCK_MAX]; 83 char device_name[ACPI_SBS_BLOCK_MAX]; 84 char device_chemistry[ACPI_SBS_BLOCK_MAX]; 85 u16 alarm_capacity; 86 u16 full_charge_capacity; 87 u16 design_capacity; 88 u16 design_voltage; 89 u16 serial_number; 90 u16 cycle_count; 91 u16 temp_now; 92 u16 voltage_now; 93 s16 rate_now; 94 s16 rate_avg; 95 u16 capacity_now; 96 u16 state_of_charge; 97 u16 state; 98 u16 mode; 99 u16 spec; 100 u8 id; 101 u8 present:1; 102 u8 have_sysfs_alarm:1; 103}; 104 105#define to_acpi_battery(x) power_supply_get_drvdata(x) 106 107struct acpi_sbs { 108 struct power_supply *charger; 109 struct acpi_device *device; 110 struct acpi_smb_hc *hc; 111 struct mutex lock; 112 struct acpi_battery battery[MAX_SBS_BAT]; 113 u8 batteries_supported:4; 114 u8 manager_present:1; 115 u8 charger_present:1; 116 u8 charger_exists:1; 117}; 118 119#define to_acpi_sbs(x) power_supply_get_drvdata(x) 120 121static int acpi_sbs_remove(struct acpi_device *device); 122static int acpi_battery_get_state(struct acpi_battery *battery); 123 124static inline int battery_scale(int log) 125{ 126 int scale = 1; 127 while (log--) 128 scale *= 10; 129 return scale; 130} 131 132static inline int acpi_battery_vscale(struct acpi_battery *battery) 133{ 134 return battery_scale((battery->spec & 0x0f00) >> 8); 135} 136 137static inline int acpi_battery_ipscale(struct acpi_battery *battery) 138{ 139 return battery_scale((battery->spec & 0xf000) >> 12); 140} 141 142static inline int acpi_battery_mode(struct acpi_battery *battery) 143{ 144 return (battery->mode & 0x8000); 145} 146 147static inline int acpi_battery_scale(struct acpi_battery *battery) 148{ 149 return (acpi_battery_mode(battery) ? 10 : 1) * 150 acpi_battery_ipscale(battery); 151} 152 153static int sbs_get_ac_property(struct power_supply *psy, 154 enum power_supply_property psp, 155 union power_supply_propval *val) 156{ 157 struct acpi_sbs *sbs = to_acpi_sbs(psy); 158 switch (psp) { 159 case POWER_SUPPLY_PROP_ONLINE: 160 val->intval = sbs->charger_present; 161 break; 162 default: 163 return -EINVAL; 164 } 165 return 0; 166} 167 168static int acpi_battery_technology(struct acpi_battery *battery) 169{ 170 if (!strcasecmp("NiCd", battery->device_chemistry)) 171 return POWER_SUPPLY_TECHNOLOGY_NiCd; 172 if (!strcasecmp("NiMH", battery->device_chemistry)) 173 return POWER_SUPPLY_TECHNOLOGY_NiMH; 174 if (!strcasecmp("LION", battery->device_chemistry)) 175 return POWER_SUPPLY_TECHNOLOGY_LION; 176 if (!strcasecmp("LiP", battery->device_chemistry)) 177 return POWER_SUPPLY_TECHNOLOGY_LIPO; 178 return POWER_SUPPLY_TECHNOLOGY_UNKNOWN; 179} 180 181static int acpi_sbs_battery_get_property(struct power_supply *psy, 182 enum power_supply_property psp, 183 union power_supply_propval *val) 184{ 185 struct acpi_battery *battery = to_acpi_battery(psy); 186 187 if ((!battery->present) && psp != POWER_SUPPLY_PROP_PRESENT) 188 return -ENODEV; 189 190 acpi_battery_get_state(battery); 191 switch (psp) { 192 case POWER_SUPPLY_PROP_STATUS: 193 if (battery->rate_now < 0) 194 val->intval = POWER_SUPPLY_STATUS_DISCHARGING; 195 else if (battery->rate_now > 0) 196 val->intval = POWER_SUPPLY_STATUS_CHARGING; 197 else 198 val->intval = POWER_SUPPLY_STATUS_FULL; 199 break; 200 case POWER_SUPPLY_PROP_PRESENT: 201 val->intval = battery->present; 202 break; 203 case POWER_SUPPLY_PROP_TECHNOLOGY: 204 val->intval = acpi_battery_technology(battery); 205 break; 206 case POWER_SUPPLY_PROP_CYCLE_COUNT: 207 val->intval = battery->cycle_count; 208 break; 209 case POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN: 210 val->intval = battery->design_voltage * 211 acpi_battery_vscale(battery) * 1000; 212 break; 213 case POWER_SUPPLY_PROP_VOLTAGE_NOW: 214 val->intval = battery->voltage_now * 215 acpi_battery_vscale(battery) * 1000; 216 break; 217 case POWER_SUPPLY_PROP_CURRENT_NOW: 218 case POWER_SUPPLY_PROP_POWER_NOW: 219 val->intval = abs(battery->rate_now) * 220 acpi_battery_ipscale(battery) * 1000; 221 val->intval *= (acpi_battery_mode(battery)) ? 222 (battery->voltage_now * 223 acpi_battery_vscale(battery) / 1000) : 1; 224 break; 225 case POWER_SUPPLY_PROP_CURRENT_AVG: 226 case POWER_SUPPLY_PROP_POWER_AVG: 227 val->intval = abs(battery->rate_avg) * 228 acpi_battery_ipscale(battery) * 1000; 229 val->intval *= (acpi_battery_mode(battery)) ? 230 (battery->voltage_now * 231 acpi_battery_vscale(battery) / 1000) : 1; 232 break; 233 case POWER_SUPPLY_PROP_CAPACITY: 234 val->intval = battery->state_of_charge; 235 break; 236 case POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN: 237 case POWER_SUPPLY_PROP_ENERGY_FULL_DESIGN: 238 val->intval = battery->design_capacity * 239 acpi_battery_scale(battery) * 1000; 240 break; 241 case POWER_SUPPLY_PROP_CHARGE_FULL: 242 case POWER_SUPPLY_PROP_ENERGY_FULL: 243 val->intval = battery->full_charge_capacity * 244 acpi_battery_scale(battery) * 1000; 245 break; 246 case POWER_SUPPLY_PROP_CHARGE_NOW: 247 case POWER_SUPPLY_PROP_ENERGY_NOW: 248 val->intval = battery->capacity_now * 249 acpi_battery_scale(battery) * 1000; 250 break; 251 case POWER_SUPPLY_PROP_TEMP: 252 val->intval = battery->temp_now - 2730; // dK -> dC 253 break; 254 case POWER_SUPPLY_PROP_MODEL_NAME: 255 val->strval = battery->device_name; 256 break; 257 case POWER_SUPPLY_PROP_MANUFACTURER: 258 val->strval = battery->manufacturer_name; 259 break; 260 default: 261 return -EINVAL; 262 } 263 return 0; 264} 265 266static enum power_supply_property sbs_ac_props[] = { 267 POWER_SUPPLY_PROP_ONLINE, 268}; 269 270static enum power_supply_property sbs_charge_battery_props[] = { 271 POWER_SUPPLY_PROP_STATUS, 272 POWER_SUPPLY_PROP_PRESENT, 273 POWER_SUPPLY_PROP_TECHNOLOGY, 274 POWER_SUPPLY_PROP_CYCLE_COUNT, 275 POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN, 276 POWER_SUPPLY_PROP_VOLTAGE_NOW, 277 POWER_SUPPLY_PROP_CURRENT_NOW, 278 POWER_SUPPLY_PROP_CURRENT_AVG, 279 POWER_SUPPLY_PROP_CAPACITY, 280 POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN, 281 POWER_SUPPLY_PROP_CHARGE_FULL, 282 POWER_SUPPLY_PROP_CHARGE_NOW, 283 POWER_SUPPLY_PROP_TEMP, 284 POWER_SUPPLY_PROP_MODEL_NAME, 285 POWER_SUPPLY_PROP_MANUFACTURER, 286}; 287 288static enum power_supply_property sbs_energy_battery_props[] = { 289 POWER_SUPPLY_PROP_STATUS, 290 POWER_SUPPLY_PROP_PRESENT, 291 POWER_SUPPLY_PROP_TECHNOLOGY, 292 POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN, 293 POWER_SUPPLY_PROP_VOLTAGE_NOW, 294 POWER_SUPPLY_PROP_CURRENT_NOW, 295 POWER_SUPPLY_PROP_CURRENT_AVG, 296 POWER_SUPPLY_PROP_POWER_NOW, 297 POWER_SUPPLY_PROP_POWER_AVG, 298 POWER_SUPPLY_PROP_CAPACITY, 299 POWER_SUPPLY_PROP_ENERGY_FULL_DESIGN, 300 POWER_SUPPLY_PROP_ENERGY_FULL, 301 POWER_SUPPLY_PROP_ENERGY_NOW, 302 POWER_SUPPLY_PROP_TEMP, 303 POWER_SUPPLY_PROP_MODEL_NAME, 304 POWER_SUPPLY_PROP_MANUFACTURER, 305}; 306 307static const struct power_supply_desc acpi_sbs_charger_desc = { 308 .name = "sbs-charger", 309 .type = POWER_SUPPLY_TYPE_MAINS, 310 .properties = sbs_ac_props, 311 .num_properties = ARRAY_SIZE(sbs_ac_props), 312 .get_property = sbs_get_ac_property, 313}; 314 315/* -------------------------------------------------------------------------- 316 Smart Battery System Management 317 -------------------------------------------------------------------------- */ 318 319struct acpi_battery_reader { 320 u8 command; /* command for battery */ 321 u8 mode; /* word or block? */ 322 size_t offset; /* offset inside struct acpi_sbs_battery */ 323}; 324 325static struct acpi_battery_reader info_readers[] = { 326 {0x01, SMBUS_READ_WORD, offsetof(struct acpi_battery, alarm_capacity)}, 327 {0x03, SMBUS_READ_WORD, offsetof(struct acpi_battery, mode)}, 328 {0x10, SMBUS_READ_WORD, offsetof(struct acpi_battery, full_charge_capacity)}, 329 {0x17, SMBUS_READ_WORD, offsetof(struct acpi_battery, cycle_count)}, 330 {0x18, SMBUS_READ_WORD, offsetof(struct acpi_battery, design_capacity)}, 331 {0x19, SMBUS_READ_WORD, offsetof(struct acpi_battery, design_voltage)}, 332 {0x1a, SMBUS_READ_WORD, offsetof(struct acpi_battery, spec)}, 333 {0x1c, SMBUS_READ_WORD, offsetof(struct acpi_battery, serial_number)}, 334 {0x20, SMBUS_READ_BLOCK, offsetof(struct acpi_battery, manufacturer_name)}, 335 {0x21, SMBUS_READ_BLOCK, offsetof(struct acpi_battery, device_name)}, 336 {0x22, SMBUS_READ_BLOCK, offsetof(struct acpi_battery, device_chemistry)}, 337}; 338 339static struct acpi_battery_reader state_readers[] = { 340 {0x08, SMBUS_READ_WORD, offsetof(struct acpi_battery, temp_now)}, 341 {0x09, SMBUS_READ_WORD, offsetof(struct acpi_battery, voltage_now)}, 342 {0x0a, SMBUS_READ_WORD, offsetof(struct acpi_battery, rate_now)}, 343 {0x0b, SMBUS_READ_WORD, offsetof(struct acpi_battery, rate_avg)}, 344 {0x0f, SMBUS_READ_WORD, offsetof(struct acpi_battery, capacity_now)}, 345 {0x0e, SMBUS_READ_WORD, offsetof(struct acpi_battery, state_of_charge)}, 346 {0x16, SMBUS_READ_WORD, offsetof(struct acpi_battery, state)}, 347}; 348 349static int acpi_manager_get_info(struct acpi_sbs *sbs) 350{ 351 int result = 0; 352 u16 battery_system_info; 353 354 result = acpi_smbus_read(sbs->hc, SMBUS_READ_WORD, ACPI_SBS_MANAGER, 355 0x04, (u8 *)&battery_system_info); 356 if (!result) 357 sbs->batteries_supported = battery_system_info & 0x000f; 358 return result; 359} 360 361static int acpi_battery_get_info(struct acpi_battery *battery) 362{ 363 int i, result = 0; 364 365 for (i = 0; i < ARRAY_SIZE(info_readers); ++i) { 366 result = acpi_smbus_read(battery->sbs->hc, 367 info_readers[i].mode, 368 ACPI_SBS_BATTERY, 369 info_readers[i].command, 370 (u8 *) battery + 371 info_readers[i].offset); 372 if (result) 373 break; 374 } 375 return result; 376} 377 378static int acpi_battery_get_state(struct acpi_battery *battery) 379{ 380 int i, result = 0; 381 382 if (battery->update_time && 383 time_before(jiffies, battery->update_time + 384 msecs_to_jiffies(cache_time))) 385 return 0; 386 for (i = 0; i < ARRAY_SIZE(state_readers); ++i) { 387 result = acpi_smbus_read(battery->sbs->hc, 388 state_readers[i].mode, 389 ACPI_SBS_BATTERY, 390 state_readers[i].command, 391 (u8 *)battery + 392 state_readers[i].offset); 393 if (result) 394 goto end; 395 } 396 end: 397 battery->update_time = jiffies; 398 return result; 399} 400 401static int acpi_battery_get_alarm(struct acpi_battery *battery) 402{ 403 return acpi_smbus_read(battery->sbs->hc, SMBUS_READ_WORD, 404 ACPI_SBS_BATTERY, 0x01, 405 (u8 *)&battery->alarm_capacity); 406} 407 408static int acpi_battery_set_alarm(struct acpi_battery *battery) 409{ 410 struct acpi_sbs *sbs = battery->sbs; 411 u16 value, sel = 1 << (battery->id + 12); 412 413 int ret; 414 415 416 if (sbs->manager_present) { 417 ret = acpi_smbus_read(sbs->hc, SMBUS_READ_WORD, ACPI_SBS_MANAGER, 418 0x01, (u8 *)&value); 419 if (ret) 420 goto end; 421 if ((value & 0xf000) != sel) { 422 value &= 0x0fff; 423 value |= sel; 424 ret = acpi_smbus_write(sbs->hc, SMBUS_WRITE_WORD, 425 ACPI_SBS_MANAGER, 426 0x01, (u8 *)&value, 2); 427 if (ret) 428 goto end; 429 } 430 } 431 ret = acpi_smbus_write(sbs->hc, SMBUS_WRITE_WORD, ACPI_SBS_BATTERY, 432 0x01, (u8 *)&battery->alarm_capacity, 2); 433 end: 434 return ret; 435} 436 437static int acpi_ac_get_present(struct acpi_sbs *sbs) 438{ 439 int result; 440 u16 status; 441 442 result = acpi_smbus_read(sbs->hc, SMBUS_READ_WORD, ACPI_SBS_CHARGER, 443 0x13, (u8 *) & status); 444 445 if (result) 446 return result; 447 448 /* 449 * The spec requires that bit 4 always be 1. If it's not set, assume 450 * that the implementation doesn't support an SBS charger 451 */ 452 if (!((status >> 4) & 0x1)) 453 return -ENODEV; 454 455 sbs->charger_present = (status >> 15) & 0x1; 456 return 0; 457} 458 459static ssize_t acpi_battery_alarm_show(struct device *dev, 460 struct device_attribute *attr, 461 char *buf) 462{ 463 struct acpi_battery *battery = to_acpi_battery(dev_get_drvdata(dev)); 464 acpi_battery_get_alarm(battery); 465 return sprintf(buf, "%d\n", battery->alarm_capacity * 466 acpi_battery_scale(battery) * 1000); 467} 468 469static ssize_t acpi_battery_alarm_store(struct device *dev, 470 struct device_attribute *attr, 471 const char *buf, size_t count) 472{ 473 unsigned long x; 474 struct acpi_battery *battery = to_acpi_battery(dev_get_drvdata(dev)); 475 if (sscanf(buf, "%lu\n", &x) == 1) 476 battery->alarm_capacity = x / 477 (1000 * acpi_battery_scale(battery)); 478 if (battery->present) 479 acpi_battery_set_alarm(battery); 480 return count; 481} 482 483static struct device_attribute alarm_attr = { 484 .attr = {.name = "alarm", .mode = 0644}, 485 .show = acpi_battery_alarm_show, 486 .store = acpi_battery_alarm_store, 487}; 488 489/* -------------------------------------------------------------------------- 490 Driver Interface 491 -------------------------------------------------------------------------- */ 492static int acpi_battery_read(struct acpi_battery *battery) 493{ 494 int result = 0, saved_present = battery->present; 495 u16 state; 496 497 if (battery->sbs->manager_present) { 498 result = acpi_smbus_read(battery->sbs->hc, SMBUS_READ_WORD, 499 ACPI_SBS_MANAGER, 0x01, (u8 *)&state); 500 if (!result) 501 battery->present = state & (1 << battery->id); 502 state &= 0x0fff; 503 state |= 1 << (battery->id + 12); 504 acpi_smbus_write(battery->sbs->hc, SMBUS_WRITE_WORD, 505 ACPI_SBS_MANAGER, 0x01, (u8 *)&state, 2); 506 } else if (battery->id == 0) 507 battery->present = 1; 508 509 if (result || !battery->present) 510 return result; 511 512 if (saved_present != battery->present) { 513 battery->update_time = 0; 514 result = acpi_battery_get_info(battery); 515 if (result) { 516 battery->present = 0; 517 return result; 518 } 519 } 520 result = acpi_battery_get_state(battery); 521 if (result) 522 battery->present = 0; 523 return result; 524} 525 526/* Smart Battery */ 527static int acpi_battery_add(struct acpi_sbs *sbs, int id) 528{ 529 struct acpi_battery *battery = &sbs->battery[id]; 530 struct power_supply_config psy_cfg = { .drv_data = battery, }; 531 int result; 532 533 battery->id = id; 534 battery->sbs = sbs; 535 result = acpi_battery_read(battery); 536 if (result) 537 return result; 538 539 sprintf(battery->name, ACPI_BATTERY_DIR_NAME, id); 540 battery->bat_desc.name = battery->name; 541 battery->bat_desc.type = POWER_SUPPLY_TYPE_BATTERY; 542 if (!acpi_battery_mode(battery)) { 543 battery->bat_desc.properties = sbs_charge_battery_props; 544 battery->bat_desc.num_properties = 545 ARRAY_SIZE(sbs_charge_battery_props); 546 } else { 547 battery->bat_desc.properties = sbs_energy_battery_props; 548 battery->bat_desc.num_properties = 549 ARRAY_SIZE(sbs_energy_battery_props); 550 } 551 battery->bat_desc.get_property = acpi_sbs_battery_get_property; 552 battery->bat = power_supply_register(&sbs->device->dev, 553 &battery->bat_desc, &psy_cfg); 554 if (IS_ERR(battery->bat)) { 555 result = PTR_ERR(battery->bat); 556 battery->bat = NULL; 557 goto end; 558 } 559 560 result = device_create_file(&battery->bat->dev, &alarm_attr); 561 if (result) 562 goto end; 563 battery->have_sysfs_alarm = 1; 564 end: 565 printk(KERN_INFO PREFIX "%s [%s]: Battery Slot [%s] (battery %s)\n", 566 ACPI_SBS_DEVICE_NAME, acpi_device_bid(sbs->device), 567 battery->name, battery->present ? "present" : "absent"); 568 return result; 569} 570 571static void acpi_battery_remove(struct acpi_sbs *sbs, int id) 572{ 573 struct acpi_battery *battery = &sbs->battery[id]; 574 575 if (battery->bat) { 576 if (battery->have_sysfs_alarm) 577 device_remove_file(&battery->bat->dev, &alarm_attr); 578 power_supply_unregister(battery->bat); 579 } 580} 581 582static int acpi_charger_add(struct acpi_sbs *sbs) 583{ 584 int result; 585 struct power_supply_config psy_cfg = { .drv_data = sbs, }; 586 587 result = acpi_ac_get_present(sbs); 588 if (result) 589 goto end; 590 591 sbs->charger_exists = 1; 592 sbs->charger = power_supply_register(&sbs->device->dev, 593 &acpi_sbs_charger_desc, &psy_cfg); 594 if (IS_ERR(sbs->charger)) { 595 result = PTR_ERR(sbs->charger); 596 sbs->charger = NULL; 597 } 598 printk(KERN_INFO PREFIX "%s [%s]: AC Adapter [%s] (%s)\n", 599 ACPI_SBS_DEVICE_NAME, acpi_device_bid(sbs->device), 600 ACPI_AC_DIR_NAME, sbs->charger_present ? "on-line" : "off-line"); 601 end: 602 return result; 603} 604 605static void acpi_charger_remove(struct acpi_sbs *sbs) 606{ 607 if (sbs->charger) 608 power_supply_unregister(sbs->charger); 609} 610 611static void acpi_sbs_callback(void *context) 612{ 613 int id; 614 struct acpi_sbs *sbs = context; 615 struct acpi_battery *bat; 616 u8 saved_charger_state = sbs->charger_present; 617 u8 saved_battery_state; 618 619 if (sbs->charger_exists) { 620 acpi_ac_get_present(sbs); 621 if (sbs->charger_present != saved_charger_state) 622 kobject_uevent(&sbs->charger->dev.kobj, KOBJ_CHANGE); 623 } 624 625 if (sbs->manager_present) { 626 for (id = 0; id < MAX_SBS_BAT; ++id) { 627 if (!(sbs->batteries_supported & (1 << id))) 628 continue; 629 bat = &sbs->battery[id]; 630 saved_battery_state = bat->present; 631 acpi_battery_read(bat); 632 if (saved_battery_state == bat->present) 633 continue; 634 kobject_uevent(&bat->bat->dev.kobj, KOBJ_CHANGE); 635 } 636 } 637} 638 639static int disable_sbs_manager(const struct dmi_system_id *d) 640{ 641 sbs_manager_broken = true; 642 return 0; 643} 644 645static struct dmi_system_id acpi_sbs_dmi_table[] = { 646 { 647 .callback = disable_sbs_manager, 648 .ident = "Apple", 649 .matches = { 650 DMI_MATCH(DMI_SYS_VENDOR, "Apple Inc.") 651 }, 652 }, 653 { }, 654}; 655 656static int acpi_sbs_add(struct acpi_device *device) 657{ 658 struct acpi_sbs *sbs; 659 int result = 0; 660 int id; 661 662 dmi_check_system(acpi_sbs_dmi_table); 663 664 sbs = kzalloc(sizeof(struct acpi_sbs), GFP_KERNEL); 665 if (!sbs) { 666 result = -ENOMEM; 667 goto end; 668 } 669 670 mutex_init(&sbs->lock); 671 672 sbs->hc = acpi_driver_data(device->parent); 673 sbs->device = device; 674 strcpy(acpi_device_name(device), ACPI_SBS_DEVICE_NAME); 675 strcpy(acpi_device_class(device), ACPI_SBS_CLASS); 676 device->driver_data = sbs; 677 678 result = acpi_charger_add(sbs); 679 if (result && result != -ENODEV) 680 goto end; 681 682 result = 0; 683 684 if (!sbs_manager_broken) { 685 result = acpi_manager_get_info(sbs); 686 if (!result) { 687 sbs->manager_present = 1; 688 for (id = 0; id < MAX_SBS_BAT; ++id) 689 if ((sbs->batteries_supported & (1 << id))) 690 acpi_battery_add(sbs, id); 691 } 692 } 693 694 if (!sbs->manager_present) 695 acpi_battery_add(sbs, 0); 696 697 acpi_smbus_register_callback(sbs->hc, acpi_sbs_callback, sbs); 698 end: 699 if (result) 700 acpi_sbs_remove(device); 701 return result; 702} 703 704static int acpi_sbs_remove(struct acpi_device *device) 705{ 706 struct acpi_sbs *sbs; 707 int id; 708 709 if (!device) 710 return -EINVAL; 711 sbs = acpi_driver_data(device); 712 if (!sbs) 713 return -EINVAL; 714 mutex_lock(&sbs->lock); 715 acpi_smbus_unregister_callback(sbs->hc); 716 for (id = 0; id < MAX_SBS_BAT; ++id) 717 acpi_battery_remove(sbs, id); 718 acpi_charger_remove(sbs); 719 mutex_unlock(&sbs->lock); 720 mutex_destroy(&sbs->lock); 721 kfree(sbs); 722 return 0; 723} 724 725#ifdef CONFIG_PM_SLEEP 726static int acpi_sbs_resume(struct device *dev) 727{ 728 struct acpi_sbs *sbs; 729 if (!dev) 730 return -EINVAL; 731 sbs = to_acpi_device(dev)->driver_data; 732 acpi_sbs_callback(sbs); 733 return 0; 734} 735#else 736#define acpi_sbs_resume NULL 737#endif 738 739static SIMPLE_DEV_PM_OPS(acpi_sbs_pm, NULL, acpi_sbs_resume); 740 741static struct acpi_driver acpi_sbs_driver = { 742 .name = "sbs", 743 .class = ACPI_SBS_CLASS, 744 .ids = sbs_device_ids, 745 .ops = { 746 .add = acpi_sbs_add, 747 .remove = acpi_sbs_remove, 748 }, 749 .drv.pm = &acpi_sbs_pm, 750}; 751 752static int __init acpi_sbs_init(void) 753{ 754 int result = 0; 755 756 if (acpi_disabled) 757 return -ENODEV; 758 759 result = acpi_bus_register_driver(&acpi_sbs_driver); 760 if (result < 0) 761 return -ENODEV; 762 763 return 0; 764} 765 766static void __exit acpi_sbs_exit(void) 767{ 768 acpi_bus_unregister_driver(&acpi_sbs_driver); 769 return; 770} 771 772module_init(acpi_sbs_init); 773module_exit(acpi_sbs_exit); 774