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}, 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 if (!*dir) { 487 *dir = proc_mkdir(dir_name, parent_dir); 488 if (!*dir) { 489 return -ENODEV; 490 } 491 (*dir)->owner = THIS_MODULE; 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, "capacity granularity 1: unknown\n"); 558 seq_printf(seq, "capacity granularity 2: unknown\n"); 559 seq_printf(seq, "model number: %s\n", battery->device_name); 560 seq_printf(seq, "serial number: %i\n", 561 battery->serial_number); 562 seq_printf(seq, "battery type: %s\n", 563 battery->device_chemistry); 564 seq_printf(seq, "OEM info: %s\n", 565 battery->manufacturer_name); 566 end: 567 mutex_unlock(&sbs->lock); 568 return result; 569 } 570 571 static int acpi_battery_info_open_fs(struct inode *inode, struct file *file) 572 { 573 return single_open(file, acpi_battery_read_info, PDE(inode)->data); 574 } 575 576 static int acpi_battery_read_state(struct seq_file *seq, void *offset) 577 { 578 struct acpi_battery *battery = seq->private; 579 struct acpi_sbs *sbs = battery->sbs; 580 int rate; 581 582 mutex_lock(&sbs->lock); 583 seq_printf(seq, "present: %s\n", 584 (battery->present) ? "yes" : "no"); 585 if (!battery->present) 586 goto end; 587 588 acpi_battery_get_state(battery); 589 seq_printf(seq, "capacity state: %s\n", 590 (battery->state & 0x0010) ? "critical" : "ok"); 591 seq_printf(seq, "charging state: %s\n", 592 (battery->current_now < 0) ? "discharging" : 593 ((battery->current_now > 0) ? "charging" : "charged")); 594 rate = abs(battery->current_now) * acpi_battery_ipscale(battery); 595 rate *= (acpi_battery_mode(battery))?(battery->voltage_now * 596 acpi_battery_vscale(battery)/1000):1; 597 seq_printf(seq, "present rate: %d%s\n", rate, 598 acpi_battery_units(battery)); 599 seq_printf(seq, "remaining capacity: %i%sh\n", 600 battery->capacity_now * acpi_battery_scale(battery), 601 acpi_battery_units(battery)); 602 seq_printf(seq, "present voltage: %i mV\n", 603 battery->voltage_now * acpi_battery_vscale(battery)); 604 605 end: 606 mutex_unlock(&sbs->lock); 607 return 0; 608 } 609 610 static int acpi_battery_state_open_fs(struct inode *inode, struct file *file) 611 { 612 return single_open(file, acpi_battery_read_state, PDE(inode)->data); 613 } 614 615 static int acpi_battery_read_alarm(struct seq_file *seq, void *offset) 616 { 617 struct acpi_battery *battery = seq->private; 618 struct acpi_sbs *sbs = battery->sbs; 619 int result = 0; 620 621 mutex_lock(&sbs->lock); 622 623 if (!battery->present) { 624 seq_printf(seq, "present: no\n"); 625 goto end; 626 } 627 628 acpi_battery_get_alarm(battery); 629 seq_printf(seq, "alarm: "); 630 if (battery->alarm_capacity) 631 seq_printf(seq, "%i%sh\n", 632 battery->alarm_capacity * 633 acpi_battery_scale(battery), 634 acpi_battery_units(battery)); 635 else 636 seq_printf(seq, "disabled\n"); 637 end: 638 mutex_unlock(&sbs->lock); 639 return result; 640 } 641 642 static ssize_t 643 acpi_battery_write_alarm(struct file *file, const char __user * buffer, 644 size_t count, loff_t * ppos) 645 { 646 struct seq_file *seq = file->private_data; 647 struct acpi_battery *battery = seq->private; 648 struct acpi_sbs *sbs = battery->sbs; 649 char alarm_string[12] = { '\0' }; 650 int result = 0; 651 mutex_lock(&sbs->lock); 652 if (!battery->present) { 653 result = -ENODEV; 654 goto end; 655 } 656 if (count > sizeof(alarm_string) - 1) { 657 result = -EINVAL; 658 goto end; 659 } 660 if (copy_from_user(alarm_string, buffer, count)) { 661 result = -EFAULT; 662 goto end; 663 } 664 alarm_string[count] = 0; 665 battery->alarm_capacity = simple_strtoul(alarm_string, NULL, 0) / 666 acpi_battery_scale(battery); 667 acpi_battery_set_alarm(battery); 668 end: 669 mutex_unlock(&sbs->lock); 670 if (result) 671 return result; 672 return count; 673 } 674 675 static int acpi_battery_alarm_open_fs(struct inode *inode, struct file *file) 676 { 677 return single_open(file, acpi_battery_read_alarm, PDE(inode)->data); 678 } 679 680 static struct file_operations acpi_battery_info_fops = { 681 .open = acpi_battery_info_open_fs, 682 .read = seq_read, 683 .llseek = seq_lseek, 684 .release = single_release, 685 .owner = THIS_MODULE, 686 }; 687 688 static struct file_operations acpi_battery_state_fops = { 689 .open = acpi_battery_state_open_fs, 690 .read = seq_read, 691 .llseek = seq_lseek, 692 .release = single_release, 693 .owner = THIS_MODULE, 694 }; 695 696 static struct file_operations acpi_battery_alarm_fops = { 697 .open = acpi_battery_alarm_open_fs, 698 .read = seq_read, 699 .write = acpi_battery_write_alarm, 700 .llseek = seq_lseek, 701 .release = single_release, 702 .owner = THIS_MODULE, 703 }; 704 705 /* Legacy AC Adapter Interface */ 706 707 static struct proc_dir_entry *acpi_ac_dir = NULL; 708 709 static int acpi_ac_read_state(struct seq_file *seq, void *offset) 710 { 711 712 struct acpi_sbs *sbs = seq->private; 713 714 mutex_lock(&sbs->lock); 715 716 seq_printf(seq, "state: %s\n", 717 sbs->charger_present ? "on-line" : "off-line"); 718 719 mutex_unlock(&sbs->lock); 720 return 0; 721 } 722 723 static int acpi_ac_state_open_fs(struct inode *inode, struct file *file) 724 { 725 return single_open(file, acpi_ac_read_state, PDE(inode)->data); 726 } 727 728 static struct file_operations acpi_ac_state_fops = { 729 .open = acpi_ac_state_open_fs, 730 .read = seq_read, 731 .llseek = seq_lseek, 732 .release = single_release, 733 .owner = THIS_MODULE, 734 }; 735 736 #endif 737 738 /* -------------------------------------------------------------------------- 739 Driver Interface 740 -------------------------------------------------------------------------- */ 741 static int acpi_battery_read(struct acpi_battery *battery) 742 { 743 int result = 0, saved_present = battery->present; 744 u16 state; 745 746 if (battery->sbs->manager_present) { 747 result = acpi_smbus_read(battery->sbs->hc, SMBUS_READ_WORD, 748 ACPI_SBS_MANAGER, 0x01, (u8 *)&state); 749 if (!result) 750 battery->present = state & (1 << battery->id); 751 state &= 0x0fff; 752 state |= 1 << (battery->id + 12); 753 acpi_smbus_write(battery->sbs->hc, SMBUS_WRITE_WORD, 754 ACPI_SBS_MANAGER, 0x01, (u8 *)&state, 2); 755 } else if (battery->id == 0) 756 battery->present = 1; 757 if (result || !battery->present) 758 return result; 759 760 if (saved_present != battery->present) { 761 battery->update_time = 0; 762 result = acpi_battery_get_info(battery); 763 if (result) 764 return result; 765 } 766 result = acpi_battery_get_state(battery); 767 return result; 768 } 769 770 /* Smart Battery */ 771 static int acpi_battery_add(struct acpi_sbs *sbs, int id) 772 { 773 struct acpi_battery *battery = &sbs->battery[id]; 774 int result; 775 776 battery->id = id; 777 battery->sbs = sbs; 778 result = acpi_battery_read(battery); 779 if (result) 780 return result; 781 782 sprintf(battery->name, ACPI_BATTERY_DIR_NAME, id); 783 #ifdef CONFIG_ACPI_PROCFS_POWER 784 acpi_sbs_add_fs(&battery->proc_entry, acpi_battery_dir, 785 battery->name, &acpi_battery_info_fops, 786 &acpi_battery_state_fops, &acpi_battery_alarm_fops, 787 battery); 788 #endif 789 #ifdef CONFIG_ACPI_SYSFS_POWER 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 #endif 811 printk(KERN_INFO PREFIX "%s [%s]: Battery Slot [%s] (battery %s)\n", 812 ACPI_SBS_DEVICE_NAME, acpi_device_bid(sbs->device), 813 battery->name, battery->present ? "present" : "absent"); 814 return result; 815 } 816 817 static void acpi_battery_remove(struct acpi_sbs *sbs, int id) 818 { 819 struct acpi_battery *battery = &sbs->battery[id]; 820 #ifdef CONFIG_ACPI_SYSFS_POWER 821 if (battery->bat.dev) { 822 if (battery->have_sysfs_alarm) 823 device_remove_file(battery->bat.dev, &alarm_attr); 824 power_supply_unregister(&battery->bat); 825 } 826 #endif 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 #ifdef CONFIG_ACPI_SYSFS_POWER 848 sbs->charger.name = "sbs-charger"; 849 sbs->charger.type = POWER_SUPPLY_TYPE_MAINS; 850 sbs->charger.properties = sbs_ac_props; 851 sbs->charger.num_properties = ARRAY_SIZE(sbs_ac_props); 852 sbs->charger.get_property = sbs_get_ac_property; 853 power_supply_register(&sbs->device->dev, &sbs->charger); 854 #endif 855 printk(KERN_INFO PREFIX "%s [%s]: AC Adapter [%s] (%s)\n", 856 ACPI_SBS_DEVICE_NAME, acpi_device_bid(sbs->device), 857 ACPI_AC_DIR_NAME, sbs->charger_present ? "on-line" : "off-line"); 858 end: 859 return result; 860 } 861 862 static void acpi_charger_remove(struct acpi_sbs *sbs) 863 { 864 #ifdef CONFIG_ACPI_SYSFS_POWER 865 if (sbs->charger.dev) 866 power_supply_unregister(&sbs->charger); 867 #endif 868 #ifdef CONFIG_ACPI_PROCFS_POWER 869 if (sbs->charger_entry) 870 acpi_sbs_remove_fs(&sbs->charger_entry, acpi_ac_dir); 871 #endif 872 } 873 874 static void acpi_sbs_callback(void *context) 875 { 876 int id; 877 struct acpi_sbs *sbs = context; 878 struct acpi_battery *bat; 879 u8 saved_charger_state = sbs->charger_present; 880 u8 saved_battery_state; 881 acpi_ac_get_present(sbs); 882 if (sbs->charger_present != saved_charger_state) { 883 #ifdef CONFIG_ACPI_PROC_EVENT 884 acpi_bus_generate_proc_event4(ACPI_AC_CLASS, ACPI_AC_DIR_NAME, 885 ACPI_SBS_NOTIFY_STATUS, 886 sbs->charger_present); 887 #endif 888 #ifdef CONFIG_ACPI_SYSFS_POWER 889 kobject_uevent(&sbs->charger.dev->kobj, KOBJ_CHANGE); 890 #endif 891 } 892 if (sbs->manager_present) { 893 for (id = 0; id < MAX_SBS_BAT; ++id) { 894 if (!(sbs->batteries_supported & (1 << id))) 895 continue; 896 bat = &sbs->battery[id]; 897 saved_battery_state = bat->present; 898 acpi_battery_read(bat); 899 if (saved_battery_state == bat->present) 900 continue; 901 #ifdef CONFIG_ACPI_PROC_EVENT 902 acpi_bus_generate_proc_event4(ACPI_BATTERY_CLASS, 903 bat->name, 904 ACPI_SBS_NOTIFY_STATUS, 905 bat->present); 906 #endif 907 #ifdef CONFIG_ACPI_SYSFS_POWER 908 kobject_uevent(&bat->bat.dev->kobj, KOBJ_CHANGE); 909 #endif 910 } 911 } 912 } 913 914 static int acpi_sbs_remove(struct acpi_device *device, int type); 915 916 static int acpi_sbs_add(struct acpi_device *device) 917 { 918 struct acpi_sbs *sbs; 919 int result = 0; 920 int id; 921 922 sbs = kzalloc(sizeof(struct acpi_sbs), GFP_KERNEL); 923 if (!sbs) { 924 result = -ENOMEM; 925 goto end; 926 } 927 928 mutex_init(&sbs->lock); 929 930 sbs->hc = acpi_driver_data(device->parent); 931 sbs->device = device; 932 strcpy(acpi_device_name(device), ACPI_SBS_DEVICE_NAME); 933 strcpy(acpi_device_class(device), ACPI_SBS_CLASS); 934 device->driver_data = sbs; 935 936 result = acpi_charger_add(sbs); 937 if (result) 938 goto end; 939 940 result = acpi_manager_get_info(sbs); 941 if (!result) { 942 sbs->manager_present = 1; 943 for (id = 0; id < MAX_SBS_BAT; ++id) 944 if ((sbs->batteries_supported & (1 << id))) 945 acpi_battery_add(sbs, id); 946 } else 947 acpi_battery_add(sbs, 0); 948 acpi_smbus_register_callback(sbs->hc, acpi_sbs_callback, sbs); 949 end: 950 if (result) 951 acpi_sbs_remove(device, 0); 952 return result; 953 } 954 955 static int acpi_sbs_remove(struct acpi_device *device, int type) 956 { 957 struct acpi_sbs *sbs; 958 int id; 959 960 if (!device) 961 return -EINVAL; 962 sbs = acpi_driver_data(device); 963 if (!sbs) 964 return -EINVAL; 965 mutex_lock(&sbs->lock); 966 acpi_smbus_unregister_callback(sbs->hc); 967 for (id = 0; id < MAX_SBS_BAT; ++id) 968 acpi_battery_remove(sbs, id); 969 acpi_charger_remove(sbs); 970 mutex_unlock(&sbs->lock); 971 mutex_destroy(&sbs->lock); 972 kfree(sbs); 973 return 0; 974 } 975 976 static void acpi_sbs_rmdirs(void) 977 { 978 #ifdef CONFIG_ACPI_PROCFS_POWER 979 if (acpi_ac_dir) { 980 acpi_unlock_ac_dir(acpi_ac_dir); 981 acpi_ac_dir = NULL; 982 } 983 if (acpi_battery_dir) { 984 acpi_unlock_battery_dir(acpi_battery_dir); 985 acpi_battery_dir = NULL; 986 } 987 #endif 988 } 989 990 static int acpi_sbs_resume(struct acpi_device *device) 991 { 992 struct acpi_sbs *sbs; 993 if (!device) 994 return -EINVAL; 995 sbs = device->driver_data; 996 acpi_sbs_callback(sbs); 997 return 0; 998 } 999 1000 static struct acpi_driver acpi_sbs_driver = { 1001 .name = "sbs", 1002 .class = ACPI_SBS_CLASS, 1003 .ids = sbs_device_ids, 1004 .ops = { 1005 .add = acpi_sbs_add, 1006 .remove = acpi_sbs_remove, 1007 .resume = acpi_sbs_resume, 1008 }, 1009 }; 1010 1011 static int __init acpi_sbs_init(void) 1012 { 1013 int result = 0; 1014 1015 if (acpi_disabled) 1016 return -ENODEV; 1017 #ifdef CONFIG_ACPI_PROCFS_POWER 1018 acpi_ac_dir = acpi_lock_ac_dir(); 1019 if (!acpi_ac_dir) 1020 return -ENODEV; 1021 acpi_battery_dir = acpi_lock_battery_dir(); 1022 if (!acpi_battery_dir) { 1023 acpi_sbs_rmdirs(); 1024 return -ENODEV; 1025 } 1026 #endif 1027 result = acpi_bus_register_driver(&acpi_sbs_driver); 1028 if (result < 0) { 1029 acpi_sbs_rmdirs(); 1030 return -ENODEV; 1031 } 1032 return 0; 1033 } 1034 1035 static void __exit acpi_sbs_exit(void) 1036 { 1037 acpi_bus_unregister_driver(&acpi_sbs_driver); 1038 acpi_sbs_rmdirs(); 1039 return; 1040 } 1041 1042 module_init(acpi_sbs_init); 1043 module_exit(acpi_sbs_exit); 1044