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