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 printk(KERN_WARNING PREFIX "Deprecated procfs I/F for SBS is loaded," 488 " please retry with CONFIG_ACPI_PROCFS_POWER cleared\n"); 489 if (!*dir) { 490 *dir = proc_mkdir(dir_name, parent_dir); 491 if (!*dir) { 492 return -ENODEV; 493 } 494 } 495 496 /* 'info' [R] */ 497 if (info_fops) 498 proc_create_data(ACPI_SBS_FILE_INFO, S_IRUGO, *dir, 499 info_fops, data); 500 501 /* 'state' [R] */ 502 if (state_fops) 503 proc_create_data(ACPI_SBS_FILE_STATE, S_IRUGO, *dir, 504 state_fops, data); 505 506 /* 'alarm' [R/W] */ 507 if (alarm_fops) 508 proc_create_data(ACPI_SBS_FILE_ALARM, S_IRUGO, *dir, 509 alarm_fops, data); 510 return 0; 511 } 512 513 static void 514 acpi_sbs_remove_fs(struct proc_dir_entry **dir, 515 struct proc_dir_entry *parent_dir) 516 { 517 if (*dir) { 518 remove_proc_entry(ACPI_SBS_FILE_INFO, *dir); 519 remove_proc_entry(ACPI_SBS_FILE_STATE, *dir); 520 remove_proc_entry(ACPI_SBS_FILE_ALARM, *dir); 521 remove_proc_entry((*dir)->name, parent_dir); 522 *dir = NULL; 523 } 524 } 525 526 /* Smart Battery Interface */ 527 static struct proc_dir_entry *acpi_battery_dir = NULL; 528 529 static inline char *acpi_battery_units(struct acpi_battery *battery) 530 { 531 return acpi_battery_mode(battery) ? " mW" : " mA"; 532 } 533 534 535 static int acpi_battery_read_info(struct seq_file *seq, void *offset) 536 { 537 struct acpi_battery *battery = seq->private; 538 struct acpi_sbs *sbs = battery->sbs; 539 int result = 0; 540 541 mutex_lock(&sbs->lock); 542 543 seq_printf(seq, "present: %s\n", 544 (battery->present) ? "yes" : "no"); 545 if (!battery->present) 546 goto end; 547 548 seq_printf(seq, "design capacity: %i%sh\n", 549 battery->design_capacity * acpi_battery_scale(battery), 550 acpi_battery_units(battery)); 551 seq_printf(seq, "last full capacity: %i%sh\n", 552 battery->full_charge_capacity * acpi_battery_scale(battery), 553 acpi_battery_units(battery)); 554 seq_printf(seq, "battery technology: rechargeable\n"); 555 seq_printf(seq, "design voltage: %i mV\n", 556 battery->design_voltage * acpi_battery_vscale(battery)); 557 seq_printf(seq, "design capacity warning: unknown\n"); 558 seq_printf(seq, "design capacity low: unknown\n"); 559 seq_printf(seq, "cycle count: %i\n", battery->cycle_count); 560 seq_printf(seq, "capacity granularity 1: unknown\n"); 561 seq_printf(seq, "capacity granularity 2: unknown\n"); 562 seq_printf(seq, "model number: %s\n", battery->device_name); 563 seq_printf(seq, "serial number: %i\n", 564 battery->serial_number); 565 seq_printf(seq, "battery type: %s\n", 566 battery->device_chemistry); 567 seq_printf(seq, "OEM info: %s\n", 568 battery->manufacturer_name); 569 end: 570 mutex_unlock(&sbs->lock); 571 return result; 572 } 573 574 static int acpi_battery_info_open_fs(struct inode *inode, struct file *file) 575 { 576 return single_open(file, acpi_battery_read_info, PDE(inode)->data); 577 } 578 579 static int acpi_battery_read_state(struct seq_file *seq, void *offset) 580 { 581 struct acpi_battery *battery = seq->private; 582 struct acpi_sbs *sbs = battery->sbs; 583 int rate; 584 585 mutex_lock(&sbs->lock); 586 seq_printf(seq, "present: %s\n", 587 (battery->present) ? "yes" : "no"); 588 if (!battery->present) 589 goto end; 590 591 acpi_battery_get_state(battery); 592 seq_printf(seq, "capacity state: %s\n", 593 (battery->state & 0x0010) ? "critical" : "ok"); 594 seq_printf(seq, "charging state: %s\n", 595 (battery->rate_now < 0) ? "discharging" : 596 ((battery->rate_now > 0) ? "charging" : "charged")); 597 rate = abs(battery->rate_now) * acpi_battery_ipscale(battery); 598 rate *= (acpi_battery_mode(battery))?(battery->voltage_now * 599 acpi_battery_vscale(battery)/1000):1; 600 seq_printf(seq, "present rate: %d%s\n", rate, 601 acpi_battery_units(battery)); 602 seq_printf(seq, "remaining capacity: %i%sh\n", 603 battery->capacity_now * acpi_battery_scale(battery), 604 acpi_battery_units(battery)); 605 seq_printf(seq, "present voltage: %i mV\n", 606 battery->voltage_now * acpi_battery_vscale(battery)); 607 608 end: 609 mutex_unlock(&sbs->lock); 610 return 0; 611 } 612 613 static int acpi_battery_state_open_fs(struct inode *inode, struct file *file) 614 { 615 return single_open(file, acpi_battery_read_state, PDE(inode)->data); 616 } 617 618 static int acpi_battery_read_alarm(struct seq_file *seq, void *offset) 619 { 620 struct acpi_battery *battery = seq->private; 621 struct acpi_sbs *sbs = battery->sbs; 622 int result = 0; 623 624 mutex_lock(&sbs->lock); 625 626 if (!battery->present) { 627 seq_printf(seq, "present: no\n"); 628 goto end; 629 } 630 631 acpi_battery_get_alarm(battery); 632 seq_printf(seq, "alarm: "); 633 if (battery->alarm_capacity) 634 seq_printf(seq, "%i%sh\n", 635 battery->alarm_capacity * 636 acpi_battery_scale(battery), 637 acpi_battery_units(battery)); 638 else 639 seq_printf(seq, "disabled\n"); 640 end: 641 mutex_unlock(&sbs->lock); 642 return result; 643 } 644 645 static ssize_t 646 acpi_battery_write_alarm(struct file *file, const char __user * buffer, 647 size_t count, loff_t * ppos) 648 { 649 struct seq_file *seq = file->private_data; 650 struct acpi_battery *battery = seq->private; 651 struct acpi_sbs *sbs = battery->sbs; 652 char alarm_string[12] = { '\0' }; 653 int result = 0; 654 mutex_lock(&sbs->lock); 655 if (!battery->present) { 656 result = -ENODEV; 657 goto end; 658 } 659 if (count > sizeof(alarm_string) - 1) { 660 result = -EINVAL; 661 goto end; 662 } 663 if (copy_from_user(alarm_string, buffer, count)) { 664 result = -EFAULT; 665 goto end; 666 } 667 alarm_string[count] = 0; 668 battery->alarm_capacity = simple_strtoul(alarm_string, NULL, 0) / 669 acpi_battery_scale(battery); 670 acpi_battery_set_alarm(battery); 671 end: 672 mutex_unlock(&sbs->lock); 673 if (result) 674 return result; 675 return count; 676 } 677 678 static int acpi_battery_alarm_open_fs(struct inode *inode, struct file *file) 679 { 680 return single_open(file, acpi_battery_read_alarm, PDE(inode)->data); 681 } 682 683 static const struct file_operations acpi_battery_info_fops = { 684 .open = acpi_battery_info_open_fs, 685 .read = seq_read, 686 .llseek = seq_lseek, 687 .release = single_release, 688 .owner = THIS_MODULE, 689 }; 690 691 static const struct file_operations acpi_battery_state_fops = { 692 .open = acpi_battery_state_open_fs, 693 .read = seq_read, 694 .llseek = seq_lseek, 695 .release = single_release, 696 .owner = THIS_MODULE, 697 }; 698 699 static const struct file_operations acpi_battery_alarm_fops = { 700 .open = acpi_battery_alarm_open_fs, 701 .read = seq_read, 702 .write = acpi_battery_write_alarm, 703 .llseek = seq_lseek, 704 .release = single_release, 705 .owner = THIS_MODULE, 706 }; 707 708 /* Legacy AC Adapter Interface */ 709 710 static struct proc_dir_entry *acpi_ac_dir = NULL; 711 712 static int acpi_ac_read_state(struct seq_file *seq, void *offset) 713 { 714 715 struct acpi_sbs *sbs = seq->private; 716 717 mutex_lock(&sbs->lock); 718 719 seq_printf(seq, "state: %s\n", 720 sbs->charger_present ? "on-line" : "off-line"); 721 722 mutex_unlock(&sbs->lock); 723 return 0; 724 } 725 726 static int acpi_ac_state_open_fs(struct inode *inode, struct file *file) 727 { 728 return single_open(file, acpi_ac_read_state, PDE(inode)->data); 729 } 730 731 static const struct file_operations acpi_ac_state_fops = { 732 .open = acpi_ac_state_open_fs, 733 .read = seq_read, 734 .llseek = seq_lseek, 735 .release = single_release, 736 .owner = THIS_MODULE, 737 }; 738 739 #endif 740 741 /* -------------------------------------------------------------------------- 742 Driver Interface 743 -------------------------------------------------------------------------- */ 744 static int acpi_battery_read(struct acpi_battery *battery) 745 { 746 int result = 0, saved_present = battery->present; 747 u16 state; 748 749 if (battery->sbs->manager_present) { 750 result = acpi_smbus_read(battery->sbs->hc, SMBUS_READ_WORD, 751 ACPI_SBS_MANAGER, 0x01, (u8 *)&state); 752 if (!result) 753 battery->present = state & (1 << battery->id); 754 state &= 0x0fff; 755 state |= 1 << (battery->id + 12); 756 acpi_smbus_write(battery->sbs->hc, SMBUS_WRITE_WORD, 757 ACPI_SBS_MANAGER, 0x01, (u8 *)&state, 2); 758 } else if (battery->id == 0) 759 battery->present = 1; 760 if (result || !battery->present) 761 return result; 762 763 if (saved_present != battery->present) { 764 battery->update_time = 0; 765 result = acpi_battery_get_info(battery); 766 if (result) 767 return result; 768 } 769 result = acpi_battery_get_state(battery); 770 return result; 771 } 772 773 /* Smart Battery */ 774 static int acpi_battery_add(struct acpi_sbs *sbs, int id) 775 { 776 struct acpi_battery *battery = &sbs->battery[id]; 777 int result; 778 779 battery->id = id; 780 battery->sbs = sbs; 781 result = acpi_battery_read(battery); 782 if (result) 783 return result; 784 785 sprintf(battery->name, ACPI_BATTERY_DIR_NAME, id); 786 #ifdef CONFIG_ACPI_PROCFS_POWER 787 acpi_sbs_add_fs(&battery->proc_entry, acpi_battery_dir, 788 battery->name, &acpi_battery_info_fops, 789 &acpi_battery_state_fops, &acpi_battery_alarm_fops, 790 battery); 791 #endif 792 battery->bat.name = battery->name; 793 battery->bat.type = POWER_SUPPLY_TYPE_BATTERY; 794 if (!acpi_battery_mode(battery)) { 795 battery->bat.properties = sbs_charge_battery_props; 796 battery->bat.num_properties = 797 ARRAY_SIZE(sbs_charge_battery_props); 798 } else { 799 battery->bat.properties = sbs_energy_battery_props; 800 battery->bat.num_properties = 801 ARRAY_SIZE(sbs_energy_battery_props); 802 } 803 battery->bat.get_property = acpi_sbs_battery_get_property; 804 result = power_supply_register(&sbs->device->dev, &battery->bat); 805 if (result) 806 goto end; 807 result = device_create_file(battery->bat.dev, &alarm_attr); 808 if (result) 809 goto end; 810 battery->have_sysfs_alarm = 1; 811 end: 812 printk(KERN_INFO PREFIX "%s [%s]: Battery Slot [%s] (battery %s)\n", 813 ACPI_SBS_DEVICE_NAME, acpi_device_bid(sbs->device), 814 battery->name, battery->present ? "present" : "absent"); 815 return result; 816 } 817 818 static void acpi_battery_remove(struct acpi_sbs *sbs, int id) 819 { 820 struct acpi_battery *battery = &sbs->battery[id]; 821 822 if (battery->bat.dev) { 823 if (battery->have_sysfs_alarm) 824 device_remove_file(battery->bat.dev, &alarm_attr); 825 power_supply_unregister(&battery->bat); 826 } 827 #ifdef CONFIG_ACPI_PROCFS_POWER 828 if (battery->proc_entry) 829 acpi_sbs_remove_fs(&battery->proc_entry, acpi_battery_dir); 830 #endif 831 } 832 833 static int acpi_charger_add(struct acpi_sbs *sbs) 834 { 835 int result; 836 837 result = acpi_ac_get_present(sbs); 838 if (result) 839 goto end; 840 #ifdef CONFIG_ACPI_PROCFS_POWER 841 result = acpi_sbs_add_fs(&sbs->charger_entry, acpi_ac_dir, 842 ACPI_AC_DIR_NAME, NULL, 843 &acpi_ac_state_fops, NULL, sbs); 844 if (result) 845 goto end; 846 #endif 847 sbs->charger.name = "sbs-charger"; 848 sbs->charger.type = POWER_SUPPLY_TYPE_MAINS; 849 sbs->charger.properties = sbs_ac_props; 850 sbs->charger.num_properties = ARRAY_SIZE(sbs_ac_props); 851 sbs->charger.get_property = sbs_get_ac_property; 852 power_supply_register(&sbs->device->dev, &sbs->charger); 853 printk(KERN_INFO PREFIX "%s [%s]: AC Adapter [%s] (%s)\n", 854 ACPI_SBS_DEVICE_NAME, acpi_device_bid(sbs->device), 855 ACPI_AC_DIR_NAME, sbs->charger_present ? "on-line" : "off-line"); 856 end: 857 return result; 858 } 859 860 static void acpi_charger_remove(struct acpi_sbs *sbs) 861 { 862 if (sbs->charger.dev) 863 power_supply_unregister(&sbs->charger); 864 #ifdef CONFIG_ACPI_PROCFS_POWER 865 if (sbs->charger_entry) 866 acpi_sbs_remove_fs(&sbs->charger_entry, acpi_ac_dir); 867 #endif 868 } 869 870 static void acpi_sbs_callback(void *context) 871 { 872 int id; 873 struct acpi_sbs *sbs = context; 874 struct acpi_battery *bat; 875 u8 saved_charger_state = sbs->charger_present; 876 u8 saved_battery_state; 877 acpi_ac_get_present(sbs); 878 if (sbs->charger_present != saved_charger_state) { 879 #ifdef CONFIG_ACPI_PROC_EVENT 880 acpi_bus_generate_proc_event4(ACPI_AC_CLASS, ACPI_AC_DIR_NAME, 881 ACPI_SBS_NOTIFY_STATUS, 882 sbs->charger_present); 883 #endif 884 kobject_uevent(&sbs->charger.dev->kobj, KOBJ_CHANGE); 885 } 886 if (sbs->manager_present) { 887 for (id = 0; id < MAX_SBS_BAT; ++id) { 888 if (!(sbs->batteries_supported & (1 << id))) 889 continue; 890 bat = &sbs->battery[id]; 891 saved_battery_state = bat->present; 892 acpi_battery_read(bat); 893 if (saved_battery_state == bat->present) 894 continue; 895 #ifdef CONFIG_ACPI_PROC_EVENT 896 acpi_bus_generate_proc_event4(ACPI_BATTERY_CLASS, 897 bat->name, 898 ACPI_SBS_NOTIFY_STATUS, 899 bat->present); 900 #endif 901 kobject_uevent(&bat->bat.dev->kobj, KOBJ_CHANGE); 902 } 903 } 904 } 905 906 static int acpi_sbs_remove(struct acpi_device *device, int type); 907 908 static int acpi_sbs_add(struct acpi_device *device) 909 { 910 struct acpi_sbs *sbs; 911 int result = 0; 912 int id; 913 914 sbs = kzalloc(sizeof(struct acpi_sbs), GFP_KERNEL); 915 if (!sbs) { 916 result = -ENOMEM; 917 goto end; 918 } 919 920 mutex_init(&sbs->lock); 921 922 sbs->hc = acpi_driver_data(device->parent); 923 sbs->device = device; 924 strcpy(acpi_device_name(device), ACPI_SBS_DEVICE_NAME); 925 strcpy(acpi_device_class(device), ACPI_SBS_CLASS); 926 device->driver_data = sbs; 927 928 result = acpi_charger_add(sbs); 929 if (result) 930 goto end; 931 932 result = acpi_manager_get_info(sbs); 933 if (!result) { 934 sbs->manager_present = 1; 935 for (id = 0; id < MAX_SBS_BAT; ++id) 936 if ((sbs->batteries_supported & (1 << id))) 937 acpi_battery_add(sbs, id); 938 } else 939 acpi_battery_add(sbs, 0); 940 acpi_smbus_register_callback(sbs->hc, acpi_sbs_callback, sbs); 941 end: 942 if (result) 943 acpi_sbs_remove(device, 0); 944 return result; 945 } 946 947 static int acpi_sbs_remove(struct acpi_device *device, int type) 948 { 949 struct acpi_sbs *sbs; 950 int id; 951 952 if (!device) 953 return -EINVAL; 954 sbs = acpi_driver_data(device); 955 if (!sbs) 956 return -EINVAL; 957 mutex_lock(&sbs->lock); 958 acpi_smbus_unregister_callback(sbs->hc); 959 for (id = 0; id < MAX_SBS_BAT; ++id) 960 acpi_battery_remove(sbs, id); 961 acpi_charger_remove(sbs); 962 mutex_unlock(&sbs->lock); 963 mutex_destroy(&sbs->lock); 964 kfree(sbs); 965 return 0; 966 } 967 968 static void acpi_sbs_rmdirs(void) 969 { 970 #ifdef CONFIG_ACPI_PROCFS_POWER 971 if (acpi_ac_dir) { 972 acpi_unlock_ac_dir(acpi_ac_dir); 973 acpi_ac_dir = NULL; 974 } 975 if (acpi_battery_dir) { 976 acpi_unlock_battery_dir(acpi_battery_dir); 977 acpi_battery_dir = NULL; 978 } 979 #endif 980 } 981 982 static int acpi_sbs_resume(struct acpi_device *device) 983 { 984 struct acpi_sbs *sbs; 985 if (!device) 986 return -EINVAL; 987 sbs = device->driver_data; 988 acpi_sbs_callback(sbs); 989 return 0; 990 } 991 992 static struct acpi_driver acpi_sbs_driver = { 993 .name = "sbs", 994 .class = ACPI_SBS_CLASS, 995 .ids = sbs_device_ids, 996 .ops = { 997 .add = acpi_sbs_add, 998 .remove = acpi_sbs_remove, 999 .resume = acpi_sbs_resume, 1000 }, 1001 }; 1002 1003 static int __init acpi_sbs_init(void) 1004 { 1005 int result = 0; 1006 1007 if (acpi_disabled) 1008 return -ENODEV; 1009 #ifdef CONFIG_ACPI_PROCFS_POWER 1010 acpi_ac_dir = acpi_lock_ac_dir(); 1011 if (!acpi_ac_dir) 1012 return -ENODEV; 1013 acpi_battery_dir = acpi_lock_battery_dir(); 1014 if (!acpi_battery_dir) { 1015 acpi_sbs_rmdirs(); 1016 return -ENODEV; 1017 } 1018 #endif 1019 result = acpi_bus_register_driver(&acpi_sbs_driver); 1020 if (result < 0) { 1021 acpi_sbs_rmdirs(); 1022 return -ENODEV; 1023 } 1024 return 0; 1025 } 1026 1027 static void __exit acpi_sbs_exit(void) 1028 { 1029 acpi_bus_unregister_driver(&acpi_sbs_driver); 1030 acpi_sbs_rmdirs(); 1031 return; 1032 } 1033 1034 module_init(acpi_sbs_init); 1035 module_exit(acpi_sbs_exit); 1036