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 #ifdef CONFIG_ACPI_PROCFS_POWER 34 #include <linux/proc_fs.h> 35 #include <linux/seq_file.h> 36 #include <asm/uaccess.h> 37 #endif 38 39 #include <linux/acpi.h> 40 #include <linux/timer.h> 41 #include <linux/jiffies.h> 42 #include <linux/delay.h> 43 #include <linux/power_supply.h> 44 45 #include "sbshc.h" 46 47 #define PREFIX "ACPI: " 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 struct power_supply bat; 86 struct acpi_sbs *sbs; 87 #ifdef CONFIG_ACPI_PROCFS_POWER 88 struct proc_dir_entry *proc_entry; 89 #endif 90 unsigned long update_time; 91 char name[8]; 92 char manufacturer_name[ACPI_SBS_BLOCK_MAX]; 93 char device_name[ACPI_SBS_BLOCK_MAX]; 94 char device_chemistry[ACPI_SBS_BLOCK_MAX]; 95 u16 alarm_capacity; 96 u16 full_charge_capacity; 97 u16 design_capacity; 98 u16 design_voltage; 99 u16 serial_number; 100 u16 cycle_count; 101 u16 temp_now; 102 u16 voltage_now; 103 s16 rate_now; 104 s16 rate_avg; 105 u16 capacity_now; 106 u16 state_of_charge; 107 u16 state; 108 u16 mode; 109 u16 spec; 110 u8 id; 111 u8 present:1; 112 u8 have_sysfs_alarm:1; 113 }; 114 115 #define to_acpi_battery(x) container_of(x, struct acpi_battery, bat); 116 117 struct acpi_sbs { 118 struct power_supply charger; 119 struct acpi_device *device; 120 struct acpi_smb_hc *hc; 121 struct mutex lock; 122 #ifdef CONFIG_ACPI_PROCFS_POWER 123 struct proc_dir_entry *charger_entry; 124 #endif 125 struct acpi_battery battery[MAX_SBS_BAT]; 126 u8 batteries_supported:4; 127 u8 manager_present:1; 128 u8 charger_present:1; 129 }; 130 131 #define to_acpi_sbs(x) container_of(x, struct acpi_sbs, charger) 132 133 static inline int battery_scale(int log) 134 { 135 int scale = 1; 136 while (log--) 137 scale *= 10; 138 return scale; 139 } 140 141 static inline int acpi_battery_vscale(struct acpi_battery *battery) 142 { 143 return battery_scale((battery->spec & 0x0f00) >> 8); 144 } 145 146 static inline int acpi_battery_ipscale(struct acpi_battery *battery) 147 { 148 return battery_scale((battery->spec & 0xf000) >> 12); 149 } 150 151 static inline int acpi_battery_mode(struct acpi_battery *battery) 152 { 153 return (battery->mode & 0x8000); 154 } 155 156 static inline int acpi_battery_scale(struct acpi_battery *battery) 157 { 158 return (acpi_battery_mode(battery) ? 10 : 1) * 159 acpi_battery_ipscale(battery); 160 } 161 162 static int sbs_get_ac_property(struct power_supply *psy, 163 enum power_supply_property psp, 164 union power_supply_propval *val) 165 { 166 struct acpi_sbs *sbs = to_acpi_sbs(psy); 167 switch (psp) { 168 case POWER_SUPPLY_PROP_ONLINE: 169 val->intval = sbs->charger_present; 170 break; 171 default: 172 return -EINVAL; 173 } 174 return 0; 175 } 176 177 static int acpi_battery_technology(struct acpi_battery *battery) 178 { 179 if (!strcasecmp("NiCd", battery->device_chemistry)) 180 return POWER_SUPPLY_TECHNOLOGY_NiCd; 181 if (!strcasecmp("NiMH", battery->device_chemistry)) 182 return POWER_SUPPLY_TECHNOLOGY_NiMH; 183 if (!strcasecmp("LION", battery->device_chemistry)) 184 return POWER_SUPPLY_TECHNOLOGY_LION; 185 if (!strcasecmp("LiP", battery->device_chemistry)) 186 return POWER_SUPPLY_TECHNOLOGY_LIPO; 187 return POWER_SUPPLY_TECHNOLOGY_UNKNOWN; 188 } 189 190 static int acpi_sbs_battery_get_property(struct power_supply *psy, 191 enum power_supply_property psp, 192 union power_supply_propval *val) 193 { 194 struct acpi_battery *battery = to_acpi_battery(psy); 195 196 if ((!battery->present) && psp != POWER_SUPPLY_PROP_PRESENT) 197 return -ENODEV; 198 switch (psp) { 199 case POWER_SUPPLY_PROP_STATUS: 200 if (battery->rate_now < 0) 201 val->intval = POWER_SUPPLY_STATUS_DISCHARGING; 202 else if (battery->rate_now > 0) 203 val->intval = POWER_SUPPLY_STATUS_CHARGING; 204 else 205 val->intval = POWER_SUPPLY_STATUS_FULL; 206 break; 207 case POWER_SUPPLY_PROP_PRESENT: 208 val->intval = battery->present; 209 break; 210 case POWER_SUPPLY_PROP_TECHNOLOGY: 211 val->intval = acpi_battery_technology(battery); 212 break; 213 case POWER_SUPPLY_PROP_CYCLE_COUNT: 214 val->intval = battery->cycle_count; 215 break; 216 case POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN: 217 val->intval = battery->design_voltage * 218 acpi_battery_vscale(battery) * 1000; 219 break; 220 case POWER_SUPPLY_PROP_VOLTAGE_NOW: 221 val->intval = battery->voltage_now * 222 acpi_battery_vscale(battery) * 1000; 223 break; 224 case POWER_SUPPLY_PROP_CURRENT_NOW: 225 case POWER_SUPPLY_PROP_POWER_NOW: 226 val->intval = abs(battery->rate_now) * 227 acpi_battery_ipscale(battery) * 1000; 228 break; 229 case POWER_SUPPLY_PROP_CURRENT_AVG: 230 case POWER_SUPPLY_PROP_POWER_AVG: 231 val->intval = abs(battery->rate_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_CYCLE_COUNT, 276 POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN, 277 POWER_SUPPLY_PROP_VOLTAGE_NOW, 278 POWER_SUPPLY_PROP_CURRENT_NOW, 279 POWER_SUPPLY_PROP_CURRENT_AVG, 280 POWER_SUPPLY_PROP_CAPACITY, 281 POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN, 282 POWER_SUPPLY_PROP_CHARGE_FULL, 283 POWER_SUPPLY_PROP_CHARGE_NOW, 284 POWER_SUPPLY_PROP_TEMP, 285 POWER_SUPPLY_PROP_MODEL_NAME, 286 POWER_SUPPLY_PROP_MANUFACTURER, 287 }; 288 289 static enum power_supply_property sbs_energy_battery_props[] = { 290 POWER_SUPPLY_PROP_STATUS, 291 POWER_SUPPLY_PROP_PRESENT, 292 POWER_SUPPLY_PROP_TECHNOLOGY, 293 POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN, 294 POWER_SUPPLY_PROP_VOLTAGE_NOW, 295 POWER_SUPPLY_PROP_CURRENT_NOW, 296 POWER_SUPPLY_PROP_CURRENT_AVG, 297 POWER_SUPPLY_PROP_POWER_NOW, 298 POWER_SUPPLY_PROP_POWER_AVG, 299 POWER_SUPPLY_PROP_CAPACITY, 300 POWER_SUPPLY_PROP_ENERGY_FULL_DESIGN, 301 POWER_SUPPLY_PROP_ENERGY_FULL, 302 POWER_SUPPLY_PROP_ENERGY_NOW, 303 POWER_SUPPLY_PROP_TEMP, 304 POWER_SUPPLY_PROP_MODEL_NAME, 305 POWER_SUPPLY_PROP_MANUFACTURER, 306 }; 307 308 309 /* -------------------------------------------------------------------------- 310 Smart Battery System Management 311 -------------------------------------------------------------------------- */ 312 313 struct acpi_battery_reader { 314 u8 command; /* command for battery */ 315 u8 mode; /* word or block? */ 316 size_t offset; /* offset inside struct acpi_sbs_battery */ 317 }; 318 319 static struct acpi_battery_reader info_readers[] = { 320 {0x01, SMBUS_READ_WORD, offsetof(struct acpi_battery, alarm_capacity)}, 321 {0x03, SMBUS_READ_WORD, offsetof(struct acpi_battery, mode)}, 322 {0x10, SMBUS_READ_WORD, offsetof(struct acpi_battery, full_charge_capacity)}, 323 {0x17, SMBUS_READ_WORD, offsetof(struct acpi_battery, cycle_count)}, 324 {0x18, SMBUS_READ_WORD, offsetof(struct acpi_battery, design_capacity)}, 325 {0x19, SMBUS_READ_WORD, offsetof(struct acpi_battery, design_voltage)}, 326 {0x1a, SMBUS_READ_WORD, offsetof(struct acpi_battery, spec)}, 327 {0x1c, SMBUS_READ_WORD, offsetof(struct acpi_battery, serial_number)}, 328 {0x20, SMBUS_READ_BLOCK, offsetof(struct acpi_battery, manufacturer_name)}, 329 {0x21, SMBUS_READ_BLOCK, offsetof(struct acpi_battery, device_name)}, 330 {0x22, SMBUS_READ_BLOCK, offsetof(struct acpi_battery, device_chemistry)}, 331 }; 332 333 static struct acpi_battery_reader state_readers[] = { 334 {0x08, SMBUS_READ_WORD, offsetof(struct acpi_battery, temp_now)}, 335 {0x09, SMBUS_READ_WORD, offsetof(struct acpi_battery, voltage_now)}, 336 {0x0a, SMBUS_READ_WORD, offsetof(struct acpi_battery, rate_now)}, 337 {0x0b, SMBUS_READ_WORD, offsetof(struct acpi_battery, rate_avg)}, 338 {0x0f, SMBUS_READ_WORD, offsetof(struct acpi_battery, capacity_now)}, 339 {0x0e, SMBUS_READ_WORD, offsetof(struct acpi_battery, state_of_charge)}, 340 {0x16, SMBUS_READ_WORD, offsetof(struct acpi_battery, state)}, 341 }; 342 343 static int acpi_manager_get_info(struct acpi_sbs *sbs) 344 { 345 int result = 0; 346 u16 battery_system_info; 347 348 result = acpi_smbus_read(sbs->hc, SMBUS_READ_WORD, ACPI_SBS_MANAGER, 349 0x04, (u8 *)&battery_system_info); 350 if (!result) 351 sbs->batteries_supported = battery_system_info & 0x000f; 352 return result; 353 } 354 355 static int acpi_battery_get_info(struct acpi_battery *battery) 356 { 357 int i, result = 0; 358 359 for (i = 0; i < ARRAY_SIZE(info_readers); ++i) { 360 result = acpi_smbus_read(battery->sbs->hc, 361 info_readers[i].mode, 362 ACPI_SBS_BATTERY, 363 info_readers[i].command, 364 (u8 *) battery + 365 info_readers[i].offset); 366 if (result) 367 break; 368 } 369 return result; 370 } 371 372 static int acpi_battery_get_state(struct acpi_battery *battery) 373 { 374 int i, result = 0; 375 376 if (battery->update_time && 377 time_before(jiffies, battery->update_time + 378 msecs_to_jiffies(cache_time))) 379 return 0; 380 for (i = 0; i < ARRAY_SIZE(state_readers); ++i) { 381 result = acpi_smbus_read(battery->sbs->hc, 382 state_readers[i].mode, 383 ACPI_SBS_BATTERY, 384 state_readers[i].command, 385 (u8 *)battery + 386 state_readers[i].offset); 387 if (result) 388 goto end; 389 } 390 end: 391 battery->update_time = jiffies; 392 return result; 393 } 394 395 static int acpi_battery_get_alarm(struct acpi_battery *battery) 396 { 397 return acpi_smbus_read(battery->sbs->hc, SMBUS_READ_WORD, 398 ACPI_SBS_BATTERY, 0x01, 399 (u8 *)&battery->alarm_capacity); 400 } 401 402 static int acpi_battery_set_alarm(struct acpi_battery *battery) 403 { 404 struct acpi_sbs *sbs = battery->sbs; 405 u16 value, sel = 1 << (battery->id + 12); 406 407 int ret; 408 409 410 if (sbs->manager_present) { 411 ret = acpi_smbus_read(sbs->hc, SMBUS_READ_WORD, ACPI_SBS_MANAGER, 412 0x01, (u8 *)&value); 413 if (ret) 414 goto end; 415 if ((value & 0xf000) != sel) { 416 value &= 0x0fff; 417 value |= sel; 418 ret = acpi_smbus_write(sbs->hc, SMBUS_WRITE_WORD, 419 ACPI_SBS_MANAGER, 420 0x01, (u8 *)&value, 2); 421 if (ret) 422 goto end; 423 } 424 } 425 ret = acpi_smbus_write(sbs->hc, SMBUS_WRITE_WORD, ACPI_SBS_BATTERY, 426 0x01, (u8 *)&battery->alarm_capacity, 2); 427 end: 428 return ret; 429 } 430 431 static int acpi_ac_get_present(struct acpi_sbs *sbs) 432 { 433 int result; 434 u16 status; 435 436 result = acpi_smbus_read(sbs->hc, SMBUS_READ_WORD, ACPI_SBS_CHARGER, 437 0x13, (u8 *) & status); 438 if (!result) 439 sbs->charger_present = (status >> 15) & 0x1; 440 return result; 441 } 442 443 static ssize_t acpi_battery_alarm_show(struct device *dev, 444 struct device_attribute *attr, 445 char *buf) 446 { 447 struct acpi_battery *battery = to_acpi_battery(dev_get_drvdata(dev)); 448 acpi_battery_get_alarm(battery); 449 return sprintf(buf, "%d\n", battery->alarm_capacity * 450 acpi_battery_scale(battery) * 1000); 451 } 452 453 static ssize_t acpi_battery_alarm_store(struct device *dev, 454 struct device_attribute *attr, 455 const char *buf, size_t count) 456 { 457 unsigned long x; 458 struct acpi_battery *battery = to_acpi_battery(dev_get_drvdata(dev)); 459 if (sscanf(buf, "%ld\n", &x) == 1) 460 battery->alarm_capacity = x / 461 (1000 * acpi_battery_scale(battery)); 462 if (battery->present) 463 acpi_battery_set_alarm(battery); 464 return count; 465 } 466 467 static struct device_attribute alarm_attr = { 468 .attr = {.name = "alarm", .mode = 0644}, 469 .show = acpi_battery_alarm_show, 470 .store = acpi_battery_alarm_store, 471 }; 472 473 /* -------------------------------------------------------------------------- 474 FS Interface (/proc/acpi) 475 -------------------------------------------------------------------------- */ 476 477 #ifdef CONFIG_ACPI_PROCFS_POWER 478 /* Generic Routines */ 479 static int 480 acpi_sbs_add_fs(struct proc_dir_entry **dir, 481 struct proc_dir_entry *parent_dir, 482 char *dir_name, 483 const struct file_operations *info_fops, 484 const struct file_operations *state_fops, 485 const struct file_operations *alarm_fops, void *data) 486 { 487 if (!*dir) { 488 *dir = proc_mkdir(dir_name, parent_dir); 489 if (!*dir) { 490 return -ENODEV; 491 } 492 } 493 494 /* 'info' [R] */ 495 if (info_fops) 496 proc_create_data(ACPI_SBS_FILE_INFO, S_IRUGO, *dir, 497 info_fops, data); 498 499 /* 'state' [R] */ 500 if (state_fops) 501 proc_create_data(ACPI_SBS_FILE_STATE, S_IRUGO, *dir, 502 state_fops, data); 503 504 /* 'alarm' [R/W] */ 505 if (alarm_fops) 506 proc_create_data(ACPI_SBS_FILE_ALARM, S_IRUGO, *dir, 507 alarm_fops, data); 508 return 0; 509 } 510 511 static void 512 acpi_sbs_remove_fs(struct proc_dir_entry **dir, 513 struct proc_dir_entry *parent_dir) 514 { 515 if (*dir) { 516 remove_proc_entry(ACPI_SBS_FILE_INFO, *dir); 517 remove_proc_entry(ACPI_SBS_FILE_STATE, *dir); 518 remove_proc_entry(ACPI_SBS_FILE_ALARM, *dir); 519 remove_proc_entry((*dir)->name, parent_dir); 520 *dir = NULL; 521 } 522 } 523 524 /* Smart Battery Interface */ 525 static struct proc_dir_entry *acpi_battery_dir = NULL; 526 527 static inline char *acpi_battery_units(struct acpi_battery *battery) 528 { 529 return acpi_battery_mode(battery) ? " mW" : " mA"; 530 } 531 532 533 static int acpi_battery_read_info(struct seq_file *seq, void *offset) 534 { 535 struct acpi_battery *battery = seq->private; 536 struct acpi_sbs *sbs = battery->sbs; 537 int result = 0; 538 539 mutex_lock(&sbs->lock); 540 541 seq_printf(seq, "present: %s\n", 542 (battery->present) ? "yes" : "no"); 543 if (!battery->present) 544 goto end; 545 546 seq_printf(seq, "design capacity: %i%sh\n", 547 battery->design_capacity * acpi_battery_scale(battery), 548 acpi_battery_units(battery)); 549 seq_printf(seq, "last full capacity: %i%sh\n", 550 battery->full_charge_capacity * acpi_battery_scale(battery), 551 acpi_battery_units(battery)); 552 seq_printf(seq, "battery technology: rechargeable\n"); 553 seq_printf(seq, "design voltage: %i mV\n", 554 battery->design_voltage * acpi_battery_vscale(battery)); 555 seq_printf(seq, "design capacity warning: unknown\n"); 556 seq_printf(seq, "design capacity low: unknown\n"); 557 seq_printf(seq, "cycle count: %i\n", battery->cycle_count); 558 seq_printf(seq, "capacity granularity 1: unknown\n"); 559 seq_printf(seq, "capacity granularity 2: unknown\n"); 560 seq_printf(seq, "model number: %s\n", battery->device_name); 561 seq_printf(seq, "serial number: %i\n", 562 battery->serial_number); 563 seq_printf(seq, "battery type: %s\n", 564 battery->device_chemistry); 565 seq_printf(seq, "OEM info: %s\n", 566 battery->manufacturer_name); 567 end: 568 mutex_unlock(&sbs->lock); 569 return result; 570 } 571 572 static int acpi_battery_info_open_fs(struct inode *inode, struct file *file) 573 { 574 return single_open(file, acpi_battery_read_info, PDE(inode)->data); 575 } 576 577 static int acpi_battery_read_state(struct seq_file *seq, void *offset) 578 { 579 struct acpi_battery *battery = seq->private; 580 struct acpi_sbs *sbs = battery->sbs; 581 int rate; 582 583 mutex_lock(&sbs->lock); 584 seq_printf(seq, "present: %s\n", 585 (battery->present) ? "yes" : "no"); 586 if (!battery->present) 587 goto end; 588 589 acpi_battery_get_state(battery); 590 seq_printf(seq, "capacity state: %s\n", 591 (battery->state & 0x0010) ? "critical" : "ok"); 592 seq_printf(seq, "charging state: %s\n", 593 (battery->rate_now < 0) ? "discharging" : 594 ((battery->rate_now > 0) ? "charging" : "charged")); 595 rate = abs(battery->rate_now) * acpi_battery_ipscale(battery); 596 rate *= (acpi_battery_mode(battery))?(battery->voltage_now * 597 acpi_battery_vscale(battery)/1000):1; 598 seq_printf(seq, "present rate: %d%s\n", rate, 599 acpi_battery_units(battery)); 600 seq_printf(seq, "remaining capacity: %i%sh\n", 601 battery->capacity_now * acpi_battery_scale(battery), 602 acpi_battery_units(battery)); 603 seq_printf(seq, "present voltage: %i mV\n", 604 battery->voltage_now * acpi_battery_vscale(battery)); 605 606 end: 607 mutex_unlock(&sbs->lock); 608 return 0; 609 } 610 611 static int acpi_battery_state_open_fs(struct inode *inode, struct file *file) 612 { 613 return single_open(file, acpi_battery_read_state, PDE(inode)->data); 614 } 615 616 static int acpi_battery_read_alarm(struct seq_file *seq, void *offset) 617 { 618 struct acpi_battery *battery = seq->private; 619 struct acpi_sbs *sbs = battery->sbs; 620 int result = 0; 621 622 mutex_lock(&sbs->lock); 623 624 if (!battery->present) { 625 seq_printf(seq, "present: no\n"); 626 goto end; 627 } 628 629 acpi_battery_get_alarm(battery); 630 seq_printf(seq, "alarm: "); 631 if (battery->alarm_capacity) 632 seq_printf(seq, "%i%sh\n", 633 battery->alarm_capacity * 634 acpi_battery_scale(battery), 635 acpi_battery_units(battery)); 636 else 637 seq_printf(seq, "disabled\n"); 638 end: 639 mutex_unlock(&sbs->lock); 640 return result; 641 } 642 643 static ssize_t 644 acpi_battery_write_alarm(struct file *file, const char __user * buffer, 645 size_t count, loff_t * ppos) 646 { 647 struct seq_file *seq = file->private_data; 648 struct acpi_battery *battery = seq->private; 649 struct acpi_sbs *sbs = battery->sbs; 650 char alarm_string[12] = { '\0' }; 651 int result = 0; 652 mutex_lock(&sbs->lock); 653 if (!battery->present) { 654 result = -ENODEV; 655 goto end; 656 } 657 if (count > sizeof(alarm_string) - 1) { 658 result = -EINVAL; 659 goto end; 660 } 661 if (copy_from_user(alarm_string, buffer, count)) { 662 result = -EFAULT; 663 goto end; 664 } 665 alarm_string[count] = 0; 666 battery->alarm_capacity = simple_strtoul(alarm_string, NULL, 0) / 667 acpi_battery_scale(battery); 668 acpi_battery_set_alarm(battery); 669 end: 670 mutex_unlock(&sbs->lock); 671 if (result) 672 return result; 673 return count; 674 } 675 676 static int acpi_battery_alarm_open_fs(struct inode *inode, struct file *file) 677 { 678 return single_open(file, acpi_battery_read_alarm, PDE(inode)->data); 679 } 680 681 static const struct file_operations acpi_battery_info_fops = { 682 .open = acpi_battery_info_open_fs, 683 .read = seq_read, 684 .llseek = seq_lseek, 685 .release = single_release, 686 .owner = THIS_MODULE, 687 }; 688 689 static const struct file_operations acpi_battery_state_fops = { 690 .open = acpi_battery_state_open_fs, 691 .read = seq_read, 692 .llseek = seq_lseek, 693 .release = single_release, 694 .owner = THIS_MODULE, 695 }; 696 697 static const struct file_operations acpi_battery_alarm_fops = { 698 .open = acpi_battery_alarm_open_fs, 699 .read = seq_read, 700 .write = acpi_battery_write_alarm, 701 .llseek = seq_lseek, 702 .release = single_release, 703 .owner = THIS_MODULE, 704 }; 705 706 /* Legacy AC Adapter Interface */ 707 708 static struct proc_dir_entry *acpi_ac_dir = NULL; 709 710 static int acpi_ac_read_state(struct seq_file *seq, void *offset) 711 { 712 713 struct acpi_sbs *sbs = seq->private; 714 715 mutex_lock(&sbs->lock); 716 717 seq_printf(seq, "state: %s\n", 718 sbs->charger_present ? "on-line" : "off-line"); 719 720 mutex_unlock(&sbs->lock); 721 return 0; 722 } 723 724 static int acpi_ac_state_open_fs(struct inode *inode, struct file *file) 725 { 726 return single_open(file, acpi_ac_read_state, PDE(inode)->data); 727 } 728 729 static const struct file_operations acpi_ac_state_fops = { 730 .open = acpi_ac_state_open_fs, 731 .read = seq_read, 732 .llseek = seq_lseek, 733 .release = single_release, 734 .owner = THIS_MODULE, 735 }; 736 737 #endif 738 739 /* -------------------------------------------------------------------------- 740 Driver Interface 741 -------------------------------------------------------------------------- */ 742 static int acpi_battery_read(struct acpi_battery *battery) 743 { 744 int result = 0, saved_present = battery->present; 745 u16 state; 746 747 if (battery->sbs->manager_present) { 748 result = acpi_smbus_read(battery->sbs->hc, SMBUS_READ_WORD, 749 ACPI_SBS_MANAGER, 0x01, (u8 *)&state); 750 if (!result) 751 battery->present = state & (1 << battery->id); 752 state &= 0x0fff; 753 state |= 1 << (battery->id + 12); 754 acpi_smbus_write(battery->sbs->hc, SMBUS_WRITE_WORD, 755 ACPI_SBS_MANAGER, 0x01, (u8 *)&state, 2); 756 } else if (battery->id == 0) 757 battery->present = 1; 758 if (result || !battery->present) 759 return result; 760 761 if (saved_present != battery->present) { 762 battery->update_time = 0; 763 result = acpi_battery_get_info(battery); 764 if (result) 765 return result; 766 } 767 result = acpi_battery_get_state(battery); 768 return result; 769 } 770 771 /* Smart Battery */ 772 static int acpi_battery_add(struct acpi_sbs *sbs, int id) 773 { 774 struct acpi_battery *battery = &sbs->battery[id]; 775 int result; 776 777 battery->id = id; 778 battery->sbs = sbs; 779 result = acpi_battery_read(battery); 780 if (result) 781 return result; 782 783 sprintf(battery->name, ACPI_BATTERY_DIR_NAME, id); 784 #ifdef CONFIG_ACPI_PROCFS_POWER 785 acpi_sbs_add_fs(&battery->proc_entry, acpi_battery_dir, 786 battery->name, &acpi_battery_info_fops, 787 &acpi_battery_state_fops, &acpi_battery_alarm_fops, 788 battery); 789 #endif 790 battery->bat.name = battery->name; 791 battery->bat.type = POWER_SUPPLY_TYPE_BATTERY; 792 if (!acpi_battery_mode(battery)) { 793 battery->bat.properties = sbs_charge_battery_props; 794 battery->bat.num_properties = 795 ARRAY_SIZE(sbs_charge_battery_props); 796 } else { 797 battery->bat.properties = sbs_energy_battery_props; 798 battery->bat.num_properties = 799 ARRAY_SIZE(sbs_energy_battery_props); 800 } 801 battery->bat.get_property = acpi_sbs_battery_get_property; 802 result = power_supply_register(&sbs->device->dev, &battery->bat); 803 if (result) 804 goto end; 805 result = device_create_file(battery->bat.dev, &alarm_attr); 806 if (result) 807 goto end; 808 battery->have_sysfs_alarm = 1; 809 end: 810 printk(KERN_INFO PREFIX "%s [%s]: Battery Slot [%s] (battery %s)\n", 811 ACPI_SBS_DEVICE_NAME, acpi_device_bid(sbs->device), 812 battery->name, battery->present ? "present" : "absent"); 813 return result; 814 } 815 816 static void acpi_battery_remove(struct acpi_sbs *sbs, int id) 817 { 818 struct acpi_battery *battery = &sbs->battery[id]; 819 820 if (battery->bat.dev) { 821 if (battery->have_sysfs_alarm) 822 device_remove_file(battery->bat.dev, &alarm_attr); 823 power_supply_unregister(&battery->bat); 824 } 825 #ifdef CONFIG_ACPI_PROCFS_POWER 826 if (battery->proc_entry) 827 acpi_sbs_remove_fs(&battery->proc_entry, acpi_battery_dir); 828 #endif 829 } 830 831 static int acpi_charger_add(struct acpi_sbs *sbs) 832 { 833 int result; 834 835 result = acpi_ac_get_present(sbs); 836 if (result) 837 goto end; 838 #ifdef CONFIG_ACPI_PROCFS_POWER 839 result = acpi_sbs_add_fs(&sbs->charger_entry, acpi_ac_dir, 840 ACPI_AC_DIR_NAME, NULL, 841 &acpi_ac_state_fops, NULL, sbs); 842 if (result) 843 goto end; 844 #endif 845 sbs->charger.name = "sbs-charger"; 846 sbs->charger.type = POWER_SUPPLY_TYPE_MAINS; 847 sbs->charger.properties = sbs_ac_props; 848 sbs->charger.num_properties = ARRAY_SIZE(sbs_ac_props); 849 sbs->charger.get_property = sbs_get_ac_property; 850 power_supply_register(&sbs->device->dev, &sbs->charger); 851 printk(KERN_INFO PREFIX "%s [%s]: AC Adapter [%s] (%s)\n", 852 ACPI_SBS_DEVICE_NAME, acpi_device_bid(sbs->device), 853 ACPI_AC_DIR_NAME, sbs->charger_present ? "on-line" : "off-line"); 854 end: 855 return result; 856 } 857 858 static void acpi_charger_remove(struct acpi_sbs *sbs) 859 { 860 if (sbs->charger.dev) 861 power_supply_unregister(&sbs->charger); 862 #ifdef CONFIG_ACPI_PROCFS_POWER 863 if (sbs->charger_entry) 864 acpi_sbs_remove_fs(&sbs->charger_entry, acpi_ac_dir); 865 #endif 866 } 867 868 static void acpi_sbs_callback(void *context) 869 { 870 int id; 871 struct acpi_sbs *sbs = context; 872 struct acpi_battery *bat; 873 u8 saved_charger_state = sbs->charger_present; 874 u8 saved_battery_state; 875 acpi_ac_get_present(sbs); 876 if (sbs->charger_present != saved_charger_state) { 877 #ifdef CONFIG_ACPI_PROC_EVENT 878 acpi_bus_generate_proc_event4(ACPI_AC_CLASS, ACPI_AC_DIR_NAME, 879 ACPI_SBS_NOTIFY_STATUS, 880 sbs->charger_present); 881 #endif 882 kobject_uevent(&sbs->charger.dev->kobj, KOBJ_CHANGE); 883 } 884 if (sbs->manager_present) { 885 for (id = 0; id < MAX_SBS_BAT; ++id) { 886 if (!(sbs->batteries_supported & (1 << id))) 887 continue; 888 bat = &sbs->battery[id]; 889 saved_battery_state = bat->present; 890 acpi_battery_read(bat); 891 if (saved_battery_state == bat->present) 892 continue; 893 #ifdef CONFIG_ACPI_PROC_EVENT 894 acpi_bus_generate_proc_event4(ACPI_BATTERY_CLASS, 895 bat->name, 896 ACPI_SBS_NOTIFY_STATUS, 897 bat->present); 898 #endif 899 kobject_uevent(&bat->bat.dev->kobj, KOBJ_CHANGE); 900 } 901 } 902 } 903 904 static int acpi_sbs_remove(struct acpi_device *device, int type); 905 906 static int acpi_sbs_add(struct acpi_device *device) 907 { 908 struct acpi_sbs *sbs; 909 int result = 0; 910 int id; 911 912 sbs = kzalloc(sizeof(struct acpi_sbs), GFP_KERNEL); 913 if (!sbs) { 914 result = -ENOMEM; 915 goto end; 916 } 917 918 mutex_init(&sbs->lock); 919 920 sbs->hc = acpi_driver_data(device->parent); 921 sbs->device = device; 922 strcpy(acpi_device_name(device), ACPI_SBS_DEVICE_NAME); 923 strcpy(acpi_device_class(device), ACPI_SBS_CLASS); 924 device->driver_data = sbs; 925 926 result = acpi_charger_add(sbs); 927 if (result) 928 goto end; 929 930 result = acpi_manager_get_info(sbs); 931 if (!result) { 932 sbs->manager_present = 1; 933 for (id = 0; id < MAX_SBS_BAT; ++id) 934 if ((sbs->batteries_supported & (1 << id))) 935 acpi_battery_add(sbs, id); 936 } else 937 acpi_battery_add(sbs, 0); 938 acpi_smbus_register_callback(sbs->hc, acpi_sbs_callback, sbs); 939 end: 940 if (result) 941 acpi_sbs_remove(device, 0); 942 return result; 943 } 944 945 static int acpi_sbs_remove(struct acpi_device *device, int type) 946 { 947 struct acpi_sbs *sbs; 948 int id; 949 950 if (!device) 951 return -EINVAL; 952 sbs = acpi_driver_data(device); 953 if (!sbs) 954 return -EINVAL; 955 mutex_lock(&sbs->lock); 956 acpi_smbus_unregister_callback(sbs->hc); 957 for (id = 0; id < MAX_SBS_BAT; ++id) 958 acpi_battery_remove(sbs, id); 959 acpi_charger_remove(sbs); 960 mutex_unlock(&sbs->lock); 961 mutex_destroy(&sbs->lock); 962 kfree(sbs); 963 return 0; 964 } 965 966 static void acpi_sbs_rmdirs(void) 967 { 968 #ifdef CONFIG_ACPI_PROCFS_POWER 969 if (acpi_ac_dir) { 970 acpi_unlock_ac_dir(acpi_ac_dir); 971 acpi_ac_dir = NULL; 972 } 973 if (acpi_battery_dir) { 974 acpi_unlock_battery_dir(acpi_battery_dir); 975 acpi_battery_dir = NULL; 976 } 977 #endif 978 } 979 980 static int acpi_sbs_resume(struct acpi_device *device) 981 { 982 struct acpi_sbs *sbs; 983 if (!device) 984 return -EINVAL; 985 sbs = device->driver_data; 986 acpi_sbs_callback(sbs); 987 return 0; 988 } 989 990 static struct acpi_driver acpi_sbs_driver = { 991 .name = "sbs", 992 .class = ACPI_SBS_CLASS, 993 .ids = sbs_device_ids, 994 .ops = { 995 .add = acpi_sbs_add, 996 .remove = acpi_sbs_remove, 997 .resume = acpi_sbs_resume, 998 }, 999 }; 1000 1001 static int __init acpi_sbs_init(void) 1002 { 1003 int result = 0; 1004 1005 if (acpi_disabled) 1006 return -ENODEV; 1007 #ifdef CONFIG_ACPI_PROCFS_POWER 1008 acpi_ac_dir = acpi_lock_ac_dir(); 1009 if (!acpi_ac_dir) 1010 return -ENODEV; 1011 acpi_battery_dir = acpi_lock_battery_dir(); 1012 if (!acpi_battery_dir) { 1013 acpi_sbs_rmdirs(); 1014 return -ENODEV; 1015 } 1016 #endif 1017 result = acpi_bus_register_driver(&acpi_sbs_driver); 1018 if (result < 0) { 1019 acpi_sbs_rmdirs(); 1020 return -ENODEV; 1021 } 1022 return 0; 1023 } 1024 1025 static void __exit acpi_sbs_exit(void) 1026 { 1027 acpi_bus_unregister_driver(&acpi_sbs_driver); 1028 acpi_sbs_rmdirs(); 1029 return; 1030 } 1031 1032 module_init(acpi_sbs_init); 1033 module_exit(acpi_sbs_exit); 1034