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/module.h> 29 #include <linux/moduleparam.h> 30 #include <linux/kernel.h> 31 32 #ifdef CONFIG_ACPI_PROCFS_POWER 33 #include <linux/proc_fs.h> 34 #include <linux/seq_file.h> 35 #include <asm/uaccess.h> 36 #endif 37 38 #include <linux/acpi.h> 39 #include <linux/timer.h> 40 #include <linux/jiffies.h> 41 #include <linux/delay.h> 42 43 #ifdef CONFIG_ACPI_SYSFS_POWER 44 #include <linux/power_supply.h> 45 #endif 46 47 #include "sbshc.h" 48 49 #define ACPI_SBS_CLASS "sbs" 50 #define ACPI_AC_CLASS "ac_adapter" 51 #define ACPI_BATTERY_CLASS "battery" 52 #define ACPI_SBS_DEVICE_NAME "Smart Battery System" 53 #define ACPI_SBS_FILE_INFO "info" 54 #define ACPI_SBS_FILE_STATE "state" 55 #define ACPI_SBS_FILE_ALARM "alarm" 56 #define ACPI_BATTERY_DIR_NAME "BAT%i" 57 #define ACPI_AC_DIR_NAME "AC0" 58 59 #define ACPI_SBS_NOTIFY_STATUS 0x80 60 #define ACPI_SBS_NOTIFY_INFO 0x81 61 62 MODULE_AUTHOR("Alexey Starikovskiy <astarikovskiy@suse.de>"); 63 MODULE_DESCRIPTION("Smart Battery System ACPI interface driver"); 64 MODULE_LICENSE("GPL"); 65 66 static unsigned int cache_time = 1000; 67 module_param(cache_time, uint, 0644); 68 MODULE_PARM_DESC(cache_time, "cache time in milliseconds"); 69 70 extern struct proc_dir_entry *acpi_lock_ac_dir(void); 71 extern struct proc_dir_entry *acpi_lock_battery_dir(void); 72 extern void acpi_unlock_ac_dir(struct proc_dir_entry *acpi_ac_dir); 73 extern void acpi_unlock_battery_dir(struct proc_dir_entry *acpi_battery_dir); 74 75 #define MAX_SBS_BAT 4 76 #define ACPI_SBS_BLOCK_MAX 32 77 78 static const struct acpi_device_id sbs_device_ids[] = { 79 {"ACPI0002", 0}, 80 {"", 0}, 81 }; 82 MODULE_DEVICE_TABLE(acpi, sbs_device_ids); 83 84 struct acpi_battery { 85 #ifdef CONFIG_ACPI_SYSFS_POWER 86 struct power_supply bat; 87 #endif 88 struct acpi_sbs *sbs; 89 #ifdef CONFIG_ACPI_PROCFS_POWER 90 struct proc_dir_entry *proc_entry; 91 #endif 92 unsigned long update_time; 93 char name[8]; 94 char manufacturer_name[ACPI_SBS_BLOCK_MAX]; 95 char device_name[ACPI_SBS_BLOCK_MAX]; 96 char device_chemistry[ACPI_SBS_BLOCK_MAX]; 97 u16 alarm_capacity; 98 u16 full_charge_capacity; 99 u16 design_capacity; 100 u16 design_voltage; 101 u16 serial_number; 102 u16 cycle_count; 103 u16 temp_now; 104 u16 voltage_now; 105 s16 current_now; 106 s16 current_avg; 107 u16 capacity_now; 108 u16 state_of_charge; 109 u16 state; 110 u16 mode; 111 u16 spec; 112 u8 id; 113 u8 present:1; 114 u8 have_sysfs_alarm:1; 115 }; 116 117 #define to_acpi_battery(x) container_of(x, struct acpi_battery, bat); 118 119 struct acpi_sbs { 120 #ifdef CONFIG_ACPI_SYSFS_POWER 121 struct power_supply charger; 122 #endif 123 struct acpi_device *device; 124 struct acpi_smb_hc *hc; 125 struct mutex lock; 126 #ifdef CONFIG_ACPI_PROCFS_POWER 127 struct proc_dir_entry *charger_entry; 128 #endif 129 struct acpi_battery battery[MAX_SBS_BAT]; 130 u8 batteries_supported:4; 131 u8 manager_present:1; 132 u8 charger_present:1; 133 }; 134 135 #define to_acpi_sbs(x) container_of(x, struct acpi_sbs, charger) 136 137 static inline int battery_scale(int log) 138 { 139 int scale = 1; 140 while (log--) 141 scale *= 10; 142 return scale; 143 } 144 145 static inline int acpi_battery_vscale(struct acpi_battery *battery) 146 { 147 return battery_scale((battery->spec & 0x0f00) >> 8); 148 } 149 150 static inline int acpi_battery_ipscale(struct acpi_battery *battery) 151 { 152 return battery_scale((battery->spec & 0xf000) >> 12); 153 } 154 155 static inline int acpi_battery_mode(struct acpi_battery *battery) 156 { 157 return (battery->mode & 0x8000); 158 } 159 160 static inline int acpi_battery_scale(struct acpi_battery *battery) 161 { 162 return (acpi_battery_mode(battery) ? 10 : 1) * 163 acpi_battery_ipscale(battery); 164 } 165 166 #ifdef CONFIG_ACPI_SYSFS_POWER 167 static int sbs_get_ac_property(struct power_supply *psy, 168 enum power_supply_property psp, 169 union power_supply_propval *val) 170 { 171 struct acpi_sbs *sbs = to_acpi_sbs(psy); 172 switch (psp) { 173 case POWER_SUPPLY_PROP_ONLINE: 174 val->intval = sbs->charger_present; 175 break; 176 default: 177 return -EINVAL; 178 } 179 return 0; 180 } 181 182 static int acpi_battery_technology(struct acpi_battery *battery) 183 { 184 if (!strcasecmp("NiCd", battery->device_chemistry)) 185 return POWER_SUPPLY_TECHNOLOGY_NiCd; 186 if (!strcasecmp("NiMH", battery->device_chemistry)) 187 return POWER_SUPPLY_TECHNOLOGY_NiMH; 188 if (!strcasecmp("LION", battery->device_chemistry)) 189 return POWER_SUPPLY_TECHNOLOGY_LION; 190 if (!strcasecmp("LiP", battery->device_chemistry)) 191 return POWER_SUPPLY_TECHNOLOGY_LIPO; 192 return POWER_SUPPLY_TECHNOLOGY_UNKNOWN; 193 } 194 195 static int acpi_sbs_battery_get_property(struct power_supply *psy, 196 enum power_supply_property psp, 197 union power_supply_propval *val) 198 { 199 struct acpi_battery *battery = to_acpi_battery(psy); 200 201 if ((!battery->present) && psp != POWER_SUPPLY_PROP_PRESENT) 202 return -ENODEV; 203 switch (psp) { 204 case POWER_SUPPLY_PROP_STATUS: 205 if (battery->current_now < 0) 206 val->intval = POWER_SUPPLY_STATUS_DISCHARGING; 207 else if (battery->current_now > 0) 208 val->intval = POWER_SUPPLY_STATUS_CHARGING; 209 else 210 val->intval = POWER_SUPPLY_STATUS_FULL; 211 break; 212 case POWER_SUPPLY_PROP_PRESENT: 213 val->intval = battery->present; 214 break; 215 case POWER_SUPPLY_PROP_TECHNOLOGY: 216 val->intval = acpi_battery_technology(battery); 217 break; 218 case POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN: 219 val->intval = battery->design_voltage * 220 acpi_battery_vscale(battery) * 1000; 221 break; 222 case POWER_SUPPLY_PROP_VOLTAGE_NOW: 223 val->intval = battery->voltage_now * 224 acpi_battery_vscale(battery) * 1000; 225 break; 226 case POWER_SUPPLY_PROP_CURRENT_NOW: 227 val->intval = abs(battery->current_now) * 228 acpi_battery_ipscale(battery) * 1000; 229 break; 230 case POWER_SUPPLY_PROP_CURRENT_AVG: 231 val->intval = abs(battery->current_avg) * 232 acpi_battery_ipscale(battery) * 1000; 233 break; 234 case POWER_SUPPLY_PROP_CAPACITY: 235 val->intval = battery->state_of_charge; 236 break; 237 case POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN: 238 case POWER_SUPPLY_PROP_ENERGY_FULL_DESIGN: 239 val->intval = battery->design_capacity * 240 acpi_battery_scale(battery) * 1000; 241 break; 242 case POWER_SUPPLY_PROP_CHARGE_FULL: 243 case POWER_SUPPLY_PROP_ENERGY_FULL: 244 val->intval = battery->full_charge_capacity * 245 acpi_battery_scale(battery) * 1000; 246 break; 247 case POWER_SUPPLY_PROP_CHARGE_NOW: 248 case POWER_SUPPLY_PROP_ENERGY_NOW: 249 val->intval = battery->capacity_now * 250 acpi_battery_scale(battery) * 1000; 251 break; 252 case POWER_SUPPLY_PROP_TEMP: 253 val->intval = battery->temp_now - 2730; // dK -> dC 254 break; 255 case POWER_SUPPLY_PROP_MODEL_NAME: 256 val->strval = battery->device_name; 257 break; 258 case POWER_SUPPLY_PROP_MANUFACTURER: 259 val->strval = battery->manufacturer_name; 260 break; 261 default: 262 return -EINVAL; 263 } 264 return 0; 265 } 266 267 static enum power_supply_property sbs_ac_props[] = { 268 POWER_SUPPLY_PROP_ONLINE, 269 }; 270 271 static enum power_supply_property sbs_charge_battery_props[] = { 272 POWER_SUPPLY_PROP_STATUS, 273 POWER_SUPPLY_PROP_PRESENT, 274 POWER_SUPPLY_PROP_TECHNOLOGY, 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 }; 287 288 static 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_CAPACITY, 297 POWER_SUPPLY_PROP_ENERGY_FULL_DESIGN, 298 POWER_SUPPLY_PROP_ENERGY_FULL, 299 POWER_SUPPLY_PROP_ENERGY_NOW, 300 POWER_SUPPLY_PROP_TEMP, 301 POWER_SUPPLY_PROP_MODEL_NAME, 302 POWER_SUPPLY_PROP_MANUFACTURER, 303 }; 304 #endif 305 306 /* -------------------------------------------------------------------------- 307 Smart Battery System Management 308 -------------------------------------------------------------------------- */ 309 310 struct acpi_battery_reader { 311 u8 command; /* command for battery */ 312 u8 mode; /* word or block? */ 313 size_t offset; /* offset inside struct acpi_sbs_battery */ 314 }; 315 316 static struct acpi_battery_reader info_readers[] = { 317 {0x01, SMBUS_READ_WORD, offsetof(struct acpi_battery, alarm_capacity)}, 318 {0x03, SMBUS_READ_WORD, offsetof(struct acpi_battery, mode)}, 319 {0x10, SMBUS_READ_WORD, offsetof(struct acpi_battery, full_charge_capacity)}, 320 {0x17, SMBUS_READ_WORD, offsetof(struct acpi_battery, cycle_count)}, 321 {0x18, SMBUS_READ_WORD, offsetof(struct acpi_battery, design_capacity)}, 322 {0x19, SMBUS_READ_WORD, offsetof(struct acpi_battery, design_voltage)}, 323 {0x1a, SMBUS_READ_WORD, offsetof(struct acpi_battery, spec)}, 324 {0x1c, SMBUS_READ_WORD, offsetof(struct acpi_battery, serial_number)}, 325 {0x20, SMBUS_READ_BLOCK, offsetof(struct acpi_battery, manufacturer_name)}, 326 {0x21, SMBUS_READ_BLOCK, offsetof(struct acpi_battery, device_name)}, 327 {0x22, SMBUS_READ_BLOCK, offsetof(struct acpi_battery, device_chemistry)}, 328 }; 329 330 static struct acpi_battery_reader state_readers[] = { 331 {0x08, SMBUS_READ_WORD, offsetof(struct acpi_battery, temp_now)}, 332 {0x09, SMBUS_READ_WORD, offsetof(struct acpi_battery, voltage_now)}, 333 {0x0a, SMBUS_READ_WORD, offsetof(struct acpi_battery, current_now)}, 334 {0x0b, SMBUS_READ_WORD, offsetof(struct acpi_battery, current_avg)}, 335 {0x0f, SMBUS_READ_WORD, offsetof(struct acpi_battery, capacity_now)}, 336 {0x0e, SMBUS_READ_WORD, offsetof(struct acpi_battery, state_of_charge)}, 337 {0x16, SMBUS_READ_WORD, offsetof(struct acpi_battery, state)}, 338 }; 339 340 static int acpi_manager_get_info(struct acpi_sbs *sbs) 341 { 342 int result = 0; 343 u16 battery_system_info; 344 345 result = acpi_smbus_read(sbs->hc, SMBUS_READ_WORD, ACPI_SBS_MANAGER, 346 0x04, (u8 *)&battery_system_info); 347 if (!result) 348 sbs->batteries_supported = battery_system_info & 0x000f; 349 return result; 350 } 351 352 static int acpi_battery_get_info(struct acpi_battery *battery) 353 { 354 int i, result = 0; 355 356 for (i = 0; i < ARRAY_SIZE(info_readers); ++i) { 357 result = acpi_smbus_read(battery->sbs->hc, 358 info_readers[i].mode, 359 ACPI_SBS_BATTERY, 360 info_readers[i].command, 361 (u8 *) battery + 362 info_readers[i].offset); 363 if (result) 364 break; 365 } 366 return result; 367 } 368 369 static int acpi_battery_get_state(struct acpi_battery *battery) 370 { 371 int i, result = 0; 372 373 if (battery->update_time && 374 time_before(jiffies, battery->update_time + 375 msecs_to_jiffies(cache_time))) 376 return 0; 377 for (i = 0; i < ARRAY_SIZE(state_readers); ++i) { 378 result = acpi_smbus_read(battery->sbs->hc, 379 state_readers[i].mode, 380 ACPI_SBS_BATTERY, 381 state_readers[i].command, 382 (u8 *)battery + 383 state_readers[i].offset); 384 if (result) 385 goto end; 386 } 387 end: 388 battery->update_time = jiffies; 389 return result; 390 } 391 392 static int acpi_battery_get_alarm(struct acpi_battery *battery) 393 { 394 return acpi_smbus_read(battery->sbs->hc, SMBUS_READ_WORD, 395 ACPI_SBS_BATTERY, 0x01, 396 (u8 *)&battery->alarm_capacity); 397 } 398 399 static int acpi_battery_set_alarm(struct acpi_battery *battery) 400 { 401 struct acpi_sbs *sbs = battery->sbs; 402 u16 value, sel = 1 << (battery->id + 12); 403 404 int ret; 405 406 407 if (sbs->manager_present) { 408 ret = acpi_smbus_read(sbs->hc, SMBUS_READ_WORD, ACPI_SBS_MANAGER, 409 0x01, (u8 *)&value); 410 if (ret) 411 goto end; 412 if ((value & 0xf000) != sel) { 413 value &= 0x0fff; 414 value |= sel; 415 ret = acpi_smbus_write(sbs->hc, SMBUS_WRITE_WORD, 416 ACPI_SBS_MANAGER, 417 0x01, (u8 *)&value, 2); 418 if (ret) 419 goto end; 420 } 421 } 422 ret = acpi_smbus_write(sbs->hc, SMBUS_WRITE_WORD, ACPI_SBS_BATTERY, 423 0x01, (u8 *)&battery->alarm_capacity, 2); 424 end: 425 return ret; 426 } 427 428 static int acpi_ac_get_present(struct acpi_sbs *sbs) 429 { 430 int result; 431 u16 status; 432 433 result = acpi_smbus_read(sbs->hc, SMBUS_READ_WORD, ACPI_SBS_CHARGER, 434 0x13, (u8 *) & status); 435 if (!result) 436 sbs->charger_present = (status >> 15) & 0x1; 437 return result; 438 } 439 440 #ifdef CONFIG_ACPI_SYSFS_POWER 441 static ssize_t acpi_battery_alarm_show(struct device *dev, 442 struct device_attribute *attr, 443 char *buf) 444 { 445 struct acpi_battery *battery = to_acpi_battery(dev_get_drvdata(dev)); 446 acpi_battery_get_alarm(battery); 447 return sprintf(buf, "%d\n", battery->alarm_capacity * 448 acpi_battery_scale(battery) * 1000); 449 } 450 451 static ssize_t acpi_battery_alarm_store(struct device *dev, 452 struct device_attribute *attr, 453 const char *buf, size_t count) 454 { 455 unsigned long x; 456 struct acpi_battery *battery = to_acpi_battery(dev_get_drvdata(dev)); 457 if (sscanf(buf, "%ld\n", &x) == 1) 458 battery->alarm_capacity = x / 459 (1000 * acpi_battery_scale(battery)); 460 if (battery->present) 461 acpi_battery_set_alarm(battery); 462 return count; 463 } 464 465 static struct device_attribute alarm_attr = { 466 .attr = {.name = "alarm", .mode = 0644, .owner = THIS_MODULE}, 467 .show = acpi_battery_alarm_show, 468 .store = acpi_battery_alarm_store, 469 }; 470 #endif 471 472 /* -------------------------------------------------------------------------- 473 FS Interface (/proc/acpi) 474 -------------------------------------------------------------------------- */ 475 476 #ifdef CONFIG_ACPI_PROCFS_POWER 477 /* Generic Routines */ 478 static int 479 acpi_sbs_add_fs(struct proc_dir_entry **dir, 480 struct proc_dir_entry *parent_dir, 481 char *dir_name, 482 struct file_operations *info_fops, 483 struct file_operations *state_fops, 484 struct file_operations *alarm_fops, void *data) 485 { 486 struct proc_dir_entry *entry = NULL; 487 488 if (!*dir) { 489 *dir = proc_mkdir(dir_name, parent_dir); 490 if (!*dir) { 491 return -ENODEV; 492 } 493 (*dir)->owner = THIS_MODULE; 494 } 495 496 /* 'info' [R] */ 497 if (info_fops) { 498 entry = create_proc_entry(ACPI_SBS_FILE_INFO, S_IRUGO, *dir); 499 if (entry) { 500 entry->proc_fops = info_fops; 501 entry->data = data; 502 entry->owner = THIS_MODULE; 503 } 504 } 505 506 /* 'state' [R] */ 507 if (state_fops) { 508 entry = create_proc_entry(ACPI_SBS_FILE_STATE, S_IRUGO, *dir); 509 if (entry) { 510 entry->proc_fops = state_fops; 511 entry->data = data; 512 entry->owner = THIS_MODULE; 513 } 514 } 515 516 /* 'alarm' [R/W] */ 517 if (alarm_fops) { 518 entry = create_proc_entry(ACPI_SBS_FILE_ALARM, S_IRUGO, *dir); 519 if (entry) { 520 entry->proc_fops = alarm_fops; 521 entry->data = data; 522 entry->owner = THIS_MODULE; 523 } 524 } 525 return 0; 526 } 527 528 static void 529 acpi_sbs_remove_fs(struct proc_dir_entry **dir, 530 struct proc_dir_entry *parent_dir) 531 { 532 if (*dir) { 533 remove_proc_entry(ACPI_SBS_FILE_INFO, *dir); 534 remove_proc_entry(ACPI_SBS_FILE_STATE, *dir); 535 remove_proc_entry(ACPI_SBS_FILE_ALARM, *dir); 536 remove_proc_entry((*dir)->name, parent_dir); 537 *dir = NULL; 538 } 539 } 540 541 /* Smart Battery Interface */ 542 static struct proc_dir_entry *acpi_battery_dir = NULL; 543 544 static inline char *acpi_battery_units(struct acpi_battery *battery) 545 { 546 return acpi_battery_mode(battery) ? " mW" : " mA"; 547 } 548 549 550 static int acpi_battery_read_info(struct seq_file *seq, void *offset) 551 { 552 struct acpi_battery *battery = seq->private; 553 struct acpi_sbs *sbs = battery->sbs; 554 int result = 0; 555 556 mutex_lock(&sbs->lock); 557 558 seq_printf(seq, "present: %s\n", 559 (battery->present) ? "yes" : "no"); 560 if (!battery->present) 561 goto end; 562 563 seq_printf(seq, "design capacity: %i%sh\n", 564 battery->design_capacity * acpi_battery_scale(battery), 565 acpi_battery_units(battery)); 566 seq_printf(seq, "last full capacity: %i%sh\n", 567 battery->full_charge_capacity * acpi_battery_scale(battery), 568 acpi_battery_units(battery)); 569 seq_printf(seq, "battery technology: rechargeable\n"); 570 seq_printf(seq, "design voltage: %i mV\n", 571 battery->design_voltage * acpi_battery_vscale(battery)); 572 seq_printf(seq, "design capacity warning: unknown\n"); 573 seq_printf(seq, "design capacity low: unknown\n"); 574 seq_printf(seq, "capacity granularity 1: unknown\n"); 575 seq_printf(seq, "capacity granularity 2: unknown\n"); 576 seq_printf(seq, "model number: %s\n", battery->device_name); 577 seq_printf(seq, "serial number: %i\n", 578 battery->serial_number); 579 seq_printf(seq, "battery type: %s\n", 580 battery->device_chemistry); 581 seq_printf(seq, "OEM info: %s\n", 582 battery->manufacturer_name); 583 end: 584 mutex_unlock(&sbs->lock); 585 return result; 586 } 587 588 static int acpi_battery_info_open_fs(struct inode *inode, struct file *file) 589 { 590 return single_open(file, acpi_battery_read_info, PDE(inode)->data); 591 } 592 593 static int acpi_battery_read_state(struct seq_file *seq, void *offset) 594 { 595 struct acpi_battery *battery = seq->private; 596 struct acpi_sbs *sbs = battery->sbs; 597 int rate; 598 599 mutex_lock(&sbs->lock); 600 seq_printf(seq, "present: %s\n", 601 (battery->present) ? "yes" : "no"); 602 if (!battery->present) 603 goto end; 604 605 acpi_battery_get_state(battery); 606 seq_printf(seq, "capacity state: %s\n", 607 (battery->state & 0x0010) ? "critical" : "ok"); 608 seq_printf(seq, "charging state: %s\n", 609 (battery->current_now < 0) ? "discharging" : 610 ((battery->current_now > 0) ? "charging" : "charged")); 611 rate = abs(battery->current_now) * acpi_battery_ipscale(battery); 612 rate *= (acpi_battery_mode(battery))?(battery->voltage_now * 613 acpi_battery_vscale(battery)/1000):1; 614 seq_printf(seq, "present rate: %d%s\n", rate, 615 acpi_battery_units(battery)); 616 seq_printf(seq, "remaining capacity: %i%sh\n", 617 battery->capacity_now * acpi_battery_scale(battery), 618 acpi_battery_units(battery)); 619 seq_printf(seq, "present voltage: %i mV\n", 620 battery->voltage_now * acpi_battery_vscale(battery)); 621 622 end: 623 mutex_unlock(&sbs->lock); 624 return 0; 625 } 626 627 static int acpi_battery_state_open_fs(struct inode *inode, struct file *file) 628 { 629 return single_open(file, acpi_battery_read_state, PDE(inode)->data); 630 } 631 632 static int acpi_battery_read_alarm(struct seq_file *seq, void *offset) 633 { 634 struct acpi_battery *battery = seq->private; 635 struct acpi_sbs *sbs = battery->sbs; 636 int result = 0; 637 638 mutex_lock(&sbs->lock); 639 640 if (!battery->present) { 641 seq_printf(seq, "present: no\n"); 642 goto end; 643 } 644 645 acpi_battery_get_alarm(battery); 646 seq_printf(seq, "alarm: "); 647 if (battery->alarm_capacity) 648 seq_printf(seq, "%i%sh\n", 649 battery->alarm_capacity * 650 acpi_battery_scale(battery), 651 acpi_battery_units(battery)); 652 else 653 seq_printf(seq, "disabled\n"); 654 end: 655 mutex_unlock(&sbs->lock); 656 return result; 657 } 658 659 static ssize_t 660 acpi_battery_write_alarm(struct file *file, const char __user * buffer, 661 size_t count, loff_t * ppos) 662 { 663 struct seq_file *seq = file->private_data; 664 struct acpi_battery *battery = seq->private; 665 struct acpi_sbs *sbs = battery->sbs; 666 char alarm_string[12] = { '\0' }; 667 int result = 0; 668 mutex_lock(&sbs->lock); 669 if (!battery->present) { 670 result = -ENODEV; 671 goto end; 672 } 673 if (count > sizeof(alarm_string) - 1) { 674 result = -EINVAL; 675 goto end; 676 } 677 if (copy_from_user(alarm_string, buffer, count)) { 678 result = -EFAULT; 679 goto end; 680 } 681 alarm_string[count] = 0; 682 battery->alarm_capacity = simple_strtoul(alarm_string, NULL, 0) / 683 acpi_battery_scale(battery); 684 acpi_battery_set_alarm(battery); 685 end: 686 mutex_unlock(&sbs->lock); 687 if (result) 688 return result; 689 return count; 690 } 691 692 static int acpi_battery_alarm_open_fs(struct inode *inode, struct file *file) 693 { 694 return single_open(file, acpi_battery_read_alarm, PDE(inode)->data); 695 } 696 697 static struct file_operations acpi_battery_info_fops = { 698 .open = acpi_battery_info_open_fs, 699 .read = seq_read, 700 .llseek = seq_lseek, 701 .release = single_release, 702 .owner = THIS_MODULE, 703 }; 704 705 static struct file_operations acpi_battery_state_fops = { 706 .open = acpi_battery_state_open_fs, 707 .read = seq_read, 708 .llseek = seq_lseek, 709 .release = single_release, 710 .owner = THIS_MODULE, 711 }; 712 713 static struct file_operations acpi_battery_alarm_fops = { 714 .open = acpi_battery_alarm_open_fs, 715 .read = seq_read, 716 .write = acpi_battery_write_alarm, 717 .llseek = seq_lseek, 718 .release = single_release, 719 .owner = THIS_MODULE, 720 }; 721 722 /* Legacy AC Adapter Interface */ 723 724 static struct proc_dir_entry *acpi_ac_dir = NULL; 725 726 static int acpi_ac_read_state(struct seq_file *seq, void *offset) 727 { 728 729 struct acpi_sbs *sbs = seq->private; 730 731 mutex_lock(&sbs->lock); 732 733 seq_printf(seq, "state: %s\n", 734 sbs->charger_present ? "on-line" : "off-line"); 735 736 mutex_unlock(&sbs->lock); 737 return 0; 738 } 739 740 static int acpi_ac_state_open_fs(struct inode *inode, struct file *file) 741 { 742 return single_open(file, acpi_ac_read_state, PDE(inode)->data); 743 } 744 745 static struct file_operations acpi_ac_state_fops = { 746 .open = acpi_ac_state_open_fs, 747 .read = seq_read, 748 .llseek = seq_lseek, 749 .release = single_release, 750 .owner = THIS_MODULE, 751 }; 752 753 #endif 754 755 /* -------------------------------------------------------------------------- 756 Driver Interface 757 -------------------------------------------------------------------------- */ 758 static int acpi_battery_read(struct acpi_battery *battery) 759 { 760 int result = 0, saved_present = battery->present; 761 u16 state; 762 763 if (battery->sbs->manager_present) { 764 result = acpi_smbus_read(battery->sbs->hc, SMBUS_READ_WORD, 765 ACPI_SBS_MANAGER, 0x01, (u8 *)&state); 766 if (!result) 767 battery->present = state & (1 << battery->id); 768 state &= 0x0fff; 769 state |= 1 << (battery->id + 12); 770 acpi_smbus_write(battery->sbs->hc, SMBUS_WRITE_WORD, 771 ACPI_SBS_MANAGER, 0x01, (u8 *)&state, 2); 772 } else if (battery->id == 0) 773 battery->present = 1; 774 if (result || !battery->present) 775 return result; 776 777 if (saved_present != battery->present) { 778 battery->update_time = 0; 779 result = acpi_battery_get_info(battery); 780 if (result) 781 return result; 782 } 783 result = acpi_battery_get_state(battery); 784 return result; 785 } 786 787 /* Smart Battery */ 788 static int acpi_battery_add(struct acpi_sbs *sbs, int id) 789 { 790 struct acpi_battery *battery = &sbs->battery[id]; 791 int result; 792 793 battery->id = id; 794 battery->sbs = sbs; 795 result = acpi_battery_read(battery); 796 if (result) 797 return result; 798 799 sprintf(battery->name, ACPI_BATTERY_DIR_NAME, id); 800 #ifdef CONFIG_ACPI_PROCFS_POWER 801 acpi_sbs_add_fs(&battery->proc_entry, acpi_battery_dir, 802 battery->name, &acpi_battery_info_fops, 803 &acpi_battery_state_fops, &acpi_battery_alarm_fops, 804 battery); 805 #endif 806 #ifdef CONFIG_ACPI_SYSFS_POWER 807 battery->bat.name = battery->name; 808 battery->bat.type = POWER_SUPPLY_TYPE_BATTERY; 809 if (!acpi_battery_mode(battery)) { 810 battery->bat.properties = sbs_charge_battery_props; 811 battery->bat.num_properties = 812 ARRAY_SIZE(sbs_charge_battery_props); 813 } else { 814 battery->bat.properties = sbs_energy_battery_props; 815 battery->bat.num_properties = 816 ARRAY_SIZE(sbs_energy_battery_props); 817 } 818 battery->bat.get_property = acpi_sbs_battery_get_property; 819 result = power_supply_register(&sbs->device->dev, &battery->bat); 820 if (result) 821 goto end; 822 result = device_create_file(battery->bat.dev, &alarm_attr); 823 if (result) 824 goto end; 825 battery->have_sysfs_alarm = 1; 826 end: 827 #endif 828 printk(KERN_INFO PREFIX "%s [%s]: Battery Slot [%s] (battery %s)\n", 829 ACPI_SBS_DEVICE_NAME, acpi_device_bid(sbs->device), 830 battery->name, battery->present ? "present" : "absent"); 831 return result; 832 } 833 834 static void acpi_battery_remove(struct acpi_sbs *sbs, int id) 835 { 836 struct acpi_battery *battery = &sbs->battery[id]; 837 #ifdef CONFIG_ACPI_SYSFS_POWER 838 if (battery->bat.dev) { 839 if (battery->have_sysfs_alarm) 840 device_remove_file(battery->bat.dev, &alarm_attr); 841 power_supply_unregister(&battery->bat); 842 } 843 #endif 844 #ifdef CONFIG_ACPI_PROCFS_POWER 845 if (battery->proc_entry) 846 acpi_sbs_remove_fs(&battery->proc_entry, acpi_battery_dir); 847 #endif 848 } 849 850 static int acpi_charger_add(struct acpi_sbs *sbs) 851 { 852 int result; 853 854 result = acpi_ac_get_present(sbs); 855 if (result) 856 goto end; 857 #ifdef CONFIG_ACPI_PROCFS_POWER 858 result = acpi_sbs_add_fs(&sbs->charger_entry, acpi_ac_dir, 859 ACPI_AC_DIR_NAME, NULL, 860 &acpi_ac_state_fops, NULL, sbs); 861 if (result) 862 goto end; 863 #endif 864 #ifdef CONFIG_ACPI_SYSFS_POWER 865 sbs->charger.name = "sbs-charger"; 866 sbs->charger.type = POWER_SUPPLY_TYPE_MAINS; 867 sbs->charger.properties = sbs_ac_props; 868 sbs->charger.num_properties = ARRAY_SIZE(sbs_ac_props); 869 sbs->charger.get_property = sbs_get_ac_property; 870 power_supply_register(&sbs->device->dev, &sbs->charger); 871 #endif 872 printk(KERN_INFO PREFIX "%s [%s]: AC Adapter [%s] (%s)\n", 873 ACPI_SBS_DEVICE_NAME, acpi_device_bid(sbs->device), 874 ACPI_AC_DIR_NAME, sbs->charger_present ? "on-line" : "off-line"); 875 end: 876 return result; 877 } 878 879 static void acpi_charger_remove(struct acpi_sbs *sbs) 880 { 881 #ifdef CONFIG_ACPI_SYSFS_POWER 882 if (sbs->charger.dev) 883 power_supply_unregister(&sbs->charger); 884 #endif 885 #ifdef CONFIG_ACPI_PROCFS_POWER 886 if (sbs->charger_entry) 887 acpi_sbs_remove_fs(&sbs->charger_entry, acpi_ac_dir); 888 #endif 889 } 890 891 static void acpi_sbs_callback(void *context) 892 { 893 int id; 894 struct acpi_sbs *sbs = context; 895 struct acpi_battery *bat; 896 u8 saved_charger_state = sbs->charger_present; 897 u8 saved_battery_state; 898 acpi_ac_get_present(sbs); 899 if (sbs->charger_present != saved_charger_state) { 900 #ifdef CONFIG_ACPI_PROC_EVENT 901 acpi_bus_generate_proc_event4(ACPI_AC_CLASS, ACPI_AC_DIR_NAME, 902 ACPI_SBS_NOTIFY_STATUS, 903 sbs->charger_present); 904 #endif 905 #ifdef CONFIG_ACPI_SYSFS_POWER 906 kobject_uevent(&sbs->charger.dev->kobj, KOBJ_CHANGE); 907 #endif 908 } 909 if (sbs->manager_present) { 910 for (id = 0; id < MAX_SBS_BAT; ++id) { 911 if (!(sbs->batteries_supported & (1 << id))) 912 continue; 913 bat = &sbs->battery[id]; 914 saved_battery_state = bat->present; 915 acpi_battery_read(bat); 916 if (saved_battery_state == bat->present) 917 continue; 918 #ifdef CONFIG_ACPI_PROC_EVENT 919 acpi_bus_generate_proc_event4(ACPI_BATTERY_CLASS, 920 bat->name, 921 ACPI_SBS_NOTIFY_STATUS, 922 bat->present); 923 #endif 924 #ifdef CONFIG_ACPI_SYSFS_POWER 925 kobject_uevent(&bat->bat.dev->kobj, KOBJ_CHANGE); 926 #endif 927 } 928 } 929 } 930 931 static int acpi_sbs_remove(struct acpi_device *device, int type); 932 933 static int acpi_sbs_add(struct acpi_device *device) 934 { 935 struct acpi_sbs *sbs; 936 int result = 0; 937 int id; 938 939 sbs = kzalloc(sizeof(struct acpi_sbs), GFP_KERNEL); 940 if (!sbs) { 941 result = -ENOMEM; 942 goto end; 943 } 944 945 mutex_init(&sbs->lock); 946 947 sbs->hc = acpi_driver_data(device->parent); 948 sbs->device = device; 949 strcpy(acpi_device_name(device), ACPI_SBS_DEVICE_NAME); 950 strcpy(acpi_device_class(device), ACPI_SBS_CLASS); 951 acpi_driver_data(device) = sbs; 952 953 result = acpi_charger_add(sbs); 954 if (result) 955 goto end; 956 957 result = acpi_manager_get_info(sbs); 958 if (!result) { 959 sbs->manager_present = 1; 960 for (id = 0; id < MAX_SBS_BAT; ++id) 961 if ((sbs->batteries_supported & (1 << id))) 962 acpi_battery_add(sbs, id); 963 } else 964 acpi_battery_add(sbs, 0); 965 acpi_smbus_register_callback(sbs->hc, acpi_sbs_callback, sbs); 966 end: 967 if (result) 968 acpi_sbs_remove(device, 0); 969 return result; 970 } 971 972 static int acpi_sbs_remove(struct acpi_device *device, int type) 973 { 974 struct acpi_sbs *sbs; 975 int id; 976 977 if (!device) 978 return -EINVAL; 979 sbs = acpi_driver_data(device); 980 if (!sbs) 981 return -EINVAL; 982 mutex_lock(&sbs->lock); 983 acpi_smbus_unregister_callback(sbs->hc); 984 for (id = 0; id < MAX_SBS_BAT; ++id) 985 acpi_battery_remove(sbs, id); 986 acpi_charger_remove(sbs); 987 mutex_unlock(&sbs->lock); 988 mutex_destroy(&sbs->lock); 989 kfree(sbs); 990 return 0; 991 } 992 993 static void acpi_sbs_rmdirs(void) 994 { 995 #ifdef CONFIG_ACPI_PROCFS_POWER 996 if (acpi_ac_dir) { 997 acpi_unlock_ac_dir(acpi_ac_dir); 998 acpi_ac_dir = NULL; 999 } 1000 if (acpi_battery_dir) { 1001 acpi_unlock_battery_dir(acpi_battery_dir); 1002 acpi_battery_dir = NULL; 1003 } 1004 #endif 1005 } 1006 1007 static int acpi_sbs_resume(struct acpi_device *device) 1008 { 1009 struct acpi_sbs *sbs; 1010 if (!device) 1011 return -EINVAL; 1012 sbs = device->driver_data; 1013 acpi_sbs_callback(sbs); 1014 return 0; 1015 } 1016 1017 static struct acpi_driver acpi_sbs_driver = { 1018 .name = "sbs", 1019 .class = ACPI_SBS_CLASS, 1020 .ids = sbs_device_ids, 1021 .ops = { 1022 .add = acpi_sbs_add, 1023 .remove = acpi_sbs_remove, 1024 .resume = acpi_sbs_resume, 1025 }, 1026 }; 1027 1028 static int __init acpi_sbs_init(void) 1029 { 1030 int result = 0; 1031 1032 if (acpi_disabled) 1033 return -ENODEV; 1034 #ifdef CONFIG_ACPI_PROCFS_POWER 1035 acpi_ac_dir = acpi_lock_ac_dir(); 1036 if (!acpi_ac_dir) 1037 return -ENODEV; 1038 acpi_battery_dir = acpi_lock_battery_dir(); 1039 if (!acpi_battery_dir) { 1040 acpi_sbs_rmdirs(); 1041 return -ENODEV; 1042 } 1043 #endif 1044 result = acpi_bus_register_driver(&acpi_sbs_driver); 1045 if (result < 0) { 1046 acpi_sbs_rmdirs(); 1047 return -ENODEV; 1048 } 1049 return 0; 1050 } 1051 1052 static void __exit acpi_sbs_exit(void) 1053 { 1054 acpi_bus_unregister_driver(&acpi_sbs_driver); 1055 acpi_sbs_rmdirs(); 1056 return; 1057 } 1058 1059 module_init(acpi_sbs_init); 1060 module_exit(acpi_sbs_exit); 1061