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 rate_now; 106 s16 rate_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->rate_now < 0) 206 val->intval = POWER_SUPPLY_STATUS_DISCHARGING; 207 else if (battery->rate_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 case POWER_SUPPLY_PROP_POWER_NOW: 228 val->intval = abs(battery->rate_now) * 229 acpi_battery_ipscale(battery) * 1000; 230 break; 231 case POWER_SUPPLY_PROP_CURRENT_AVG: 232 case POWER_SUPPLY_PROP_POWER_AVG: 233 val->intval = abs(battery->rate_avg) * 234 acpi_battery_ipscale(battery) * 1000; 235 break; 236 case POWER_SUPPLY_PROP_CAPACITY: 237 val->intval = battery->state_of_charge; 238 break; 239 case POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN: 240 case POWER_SUPPLY_PROP_ENERGY_FULL_DESIGN: 241 val->intval = battery->design_capacity * 242 acpi_battery_scale(battery) * 1000; 243 break; 244 case POWER_SUPPLY_PROP_CHARGE_FULL: 245 case POWER_SUPPLY_PROP_ENERGY_FULL: 246 val->intval = battery->full_charge_capacity * 247 acpi_battery_scale(battery) * 1000; 248 break; 249 case POWER_SUPPLY_PROP_CHARGE_NOW: 250 case POWER_SUPPLY_PROP_ENERGY_NOW: 251 val->intval = battery->capacity_now * 252 acpi_battery_scale(battery) * 1000; 253 break; 254 case POWER_SUPPLY_PROP_TEMP: 255 val->intval = battery->temp_now - 2730; // dK -> dC 256 break; 257 case POWER_SUPPLY_PROP_MODEL_NAME: 258 val->strval = battery->device_name; 259 break; 260 case POWER_SUPPLY_PROP_MANUFACTURER: 261 val->strval = battery->manufacturer_name; 262 break; 263 default: 264 return -EINVAL; 265 } 266 return 0; 267 } 268 269 static enum power_supply_property sbs_ac_props[] = { 270 POWER_SUPPLY_PROP_ONLINE, 271 }; 272 273 static enum power_supply_property sbs_charge_battery_props[] = { 274 POWER_SUPPLY_PROP_STATUS, 275 POWER_SUPPLY_PROP_PRESENT, 276 POWER_SUPPLY_PROP_TECHNOLOGY, 277 POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN, 278 POWER_SUPPLY_PROP_VOLTAGE_NOW, 279 POWER_SUPPLY_PROP_CURRENT_NOW, 280 POWER_SUPPLY_PROP_CURRENT_AVG, 281 POWER_SUPPLY_PROP_CAPACITY, 282 POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN, 283 POWER_SUPPLY_PROP_CHARGE_FULL, 284 POWER_SUPPLY_PROP_CHARGE_NOW, 285 POWER_SUPPLY_PROP_TEMP, 286 POWER_SUPPLY_PROP_MODEL_NAME, 287 POWER_SUPPLY_PROP_MANUFACTURER, 288 }; 289 290 static enum power_supply_property sbs_energy_battery_props[] = { 291 POWER_SUPPLY_PROP_STATUS, 292 POWER_SUPPLY_PROP_PRESENT, 293 POWER_SUPPLY_PROP_TECHNOLOGY, 294 POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN, 295 POWER_SUPPLY_PROP_VOLTAGE_NOW, 296 POWER_SUPPLY_PROP_CURRENT_NOW, 297 POWER_SUPPLY_PROP_CURRENT_AVG, 298 POWER_SUPPLY_PROP_POWER_NOW, 299 POWER_SUPPLY_PROP_POWER_AVG, 300 POWER_SUPPLY_PROP_CAPACITY, 301 POWER_SUPPLY_PROP_ENERGY_FULL_DESIGN, 302 POWER_SUPPLY_PROP_ENERGY_FULL, 303 POWER_SUPPLY_PROP_ENERGY_NOW, 304 POWER_SUPPLY_PROP_TEMP, 305 POWER_SUPPLY_PROP_MODEL_NAME, 306 POWER_SUPPLY_PROP_MANUFACTURER, 307 }; 308 309 #endif 310 311 /* -------------------------------------------------------------------------- 312 Smart Battery System Management 313 -------------------------------------------------------------------------- */ 314 315 struct acpi_battery_reader { 316 u8 command; /* command for battery */ 317 u8 mode; /* word or block? */ 318 size_t offset; /* offset inside struct acpi_sbs_battery */ 319 }; 320 321 static struct acpi_battery_reader info_readers[] = { 322 {0x01, SMBUS_READ_WORD, offsetof(struct acpi_battery, alarm_capacity)}, 323 {0x03, SMBUS_READ_WORD, offsetof(struct acpi_battery, mode)}, 324 {0x10, SMBUS_READ_WORD, offsetof(struct acpi_battery, full_charge_capacity)}, 325 {0x17, SMBUS_READ_WORD, offsetof(struct acpi_battery, cycle_count)}, 326 {0x18, SMBUS_READ_WORD, offsetof(struct acpi_battery, design_capacity)}, 327 {0x19, SMBUS_READ_WORD, offsetof(struct acpi_battery, design_voltage)}, 328 {0x1a, SMBUS_READ_WORD, offsetof(struct acpi_battery, spec)}, 329 {0x1c, SMBUS_READ_WORD, offsetof(struct acpi_battery, serial_number)}, 330 {0x20, SMBUS_READ_BLOCK, offsetof(struct acpi_battery, manufacturer_name)}, 331 {0x21, SMBUS_READ_BLOCK, offsetof(struct acpi_battery, device_name)}, 332 {0x22, SMBUS_READ_BLOCK, offsetof(struct acpi_battery, device_chemistry)}, 333 }; 334 335 static struct acpi_battery_reader state_readers[] = { 336 {0x08, SMBUS_READ_WORD, offsetof(struct acpi_battery, temp_now)}, 337 {0x09, SMBUS_READ_WORD, offsetof(struct acpi_battery, voltage_now)}, 338 {0x0a, SMBUS_READ_WORD, offsetof(struct acpi_battery, rate_now)}, 339 {0x0b, SMBUS_READ_WORD, offsetof(struct acpi_battery, rate_avg)}, 340 {0x0f, SMBUS_READ_WORD, offsetof(struct acpi_battery, capacity_now)}, 341 {0x0e, SMBUS_READ_WORD, offsetof(struct acpi_battery, state_of_charge)}, 342 {0x16, SMBUS_READ_WORD, offsetof(struct acpi_battery, state)}, 343 }; 344 345 static int acpi_manager_get_info(struct acpi_sbs *sbs) 346 { 347 int result = 0; 348 u16 battery_system_info; 349 350 result = acpi_smbus_read(sbs->hc, SMBUS_READ_WORD, ACPI_SBS_MANAGER, 351 0x04, (u8 *)&battery_system_info); 352 if (!result) 353 sbs->batteries_supported = battery_system_info & 0x000f; 354 return result; 355 } 356 357 static int acpi_battery_get_info(struct acpi_battery *battery) 358 { 359 int i, result = 0; 360 361 for (i = 0; i < ARRAY_SIZE(info_readers); ++i) { 362 result = acpi_smbus_read(battery->sbs->hc, 363 info_readers[i].mode, 364 ACPI_SBS_BATTERY, 365 info_readers[i].command, 366 (u8 *) battery + 367 info_readers[i].offset); 368 if (result) 369 break; 370 } 371 return result; 372 } 373 374 static int acpi_battery_get_state(struct acpi_battery *battery) 375 { 376 int i, result = 0; 377 378 if (battery->update_time && 379 time_before(jiffies, battery->update_time + 380 msecs_to_jiffies(cache_time))) 381 return 0; 382 for (i = 0; i < ARRAY_SIZE(state_readers); ++i) { 383 result = acpi_smbus_read(battery->sbs->hc, 384 state_readers[i].mode, 385 ACPI_SBS_BATTERY, 386 state_readers[i].command, 387 (u8 *)battery + 388 state_readers[i].offset); 389 if (result) 390 goto end; 391 } 392 end: 393 battery->update_time = jiffies; 394 return result; 395 } 396 397 static int acpi_battery_get_alarm(struct acpi_battery *battery) 398 { 399 return acpi_smbus_read(battery->sbs->hc, SMBUS_READ_WORD, 400 ACPI_SBS_BATTERY, 0x01, 401 (u8 *)&battery->alarm_capacity); 402 } 403 404 static int acpi_battery_set_alarm(struct acpi_battery *battery) 405 { 406 struct acpi_sbs *sbs = battery->sbs; 407 u16 value, sel = 1 << (battery->id + 12); 408 409 int ret; 410 411 412 if (sbs->manager_present) { 413 ret = acpi_smbus_read(sbs->hc, SMBUS_READ_WORD, ACPI_SBS_MANAGER, 414 0x01, (u8 *)&value); 415 if (ret) 416 goto end; 417 if ((value & 0xf000) != sel) { 418 value &= 0x0fff; 419 value |= sel; 420 ret = acpi_smbus_write(sbs->hc, SMBUS_WRITE_WORD, 421 ACPI_SBS_MANAGER, 422 0x01, (u8 *)&value, 2); 423 if (ret) 424 goto end; 425 } 426 } 427 ret = acpi_smbus_write(sbs->hc, SMBUS_WRITE_WORD, ACPI_SBS_BATTERY, 428 0x01, (u8 *)&battery->alarm_capacity, 2); 429 end: 430 return ret; 431 } 432 433 static int acpi_ac_get_present(struct acpi_sbs *sbs) 434 { 435 int result; 436 u16 status; 437 438 result = acpi_smbus_read(sbs->hc, SMBUS_READ_WORD, ACPI_SBS_CHARGER, 439 0x13, (u8 *) & status); 440 if (!result) 441 sbs->charger_present = (status >> 15) & 0x1; 442 return result; 443 } 444 445 #ifdef CONFIG_ACPI_SYSFS_POWER 446 static ssize_t acpi_battery_alarm_show(struct device *dev, 447 struct device_attribute *attr, 448 char *buf) 449 { 450 struct acpi_battery *battery = to_acpi_battery(dev_get_drvdata(dev)); 451 acpi_battery_get_alarm(battery); 452 return sprintf(buf, "%d\n", battery->alarm_capacity * 453 acpi_battery_scale(battery) * 1000); 454 } 455 456 static ssize_t acpi_battery_alarm_store(struct device *dev, 457 struct device_attribute *attr, 458 const char *buf, size_t count) 459 { 460 unsigned long x; 461 struct acpi_battery *battery = to_acpi_battery(dev_get_drvdata(dev)); 462 if (sscanf(buf, "%ld\n", &x) == 1) 463 battery->alarm_capacity = x / 464 (1000 * acpi_battery_scale(battery)); 465 if (battery->present) 466 acpi_battery_set_alarm(battery); 467 return count; 468 } 469 470 static struct device_attribute alarm_attr = { 471 .attr = {.name = "alarm", .mode = 0644}, 472 .show = acpi_battery_alarm_show, 473 .store = acpi_battery_alarm_store, 474 }; 475 #endif 476 477 /* -------------------------------------------------------------------------- 478 FS Interface (/proc/acpi) 479 -------------------------------------------------------------------------- */ 480 481 #ifdef CONFIG_ACPI_PROCFS_POWER 482 /* Generic Routines */ 483 static int 484 acpi_sbs_add_fs(struct proc_dir_entry **dir, 485 struct proc_dir_entry *parent_dir, 486 char *dir_name, 487 const struct file_operations *info_fops, 488 const struct file_operations *state_fops, 489 const struct file_operations *alarm_fops, void *data) 490 { 491 if (!*dir) { 492 *dir = proc_mkdir(dir_name, parent_dir); 493 if (!*dir) { 494 return -ENODEV; 495 } 496 } 497 498 /* 'info' [R] */ 499 if (info_fops) 500 proc_create_data(ACPI_SBS_FILE_INFO, S_IRUGO, *dir, 501 info_fops, data); 502 503 /* 'state' [R] */ 504 if (state_fops) 505 proc_create_data(ACPI_SBS_FILE_STATE, S_IRUGO, *dir, 506 state_fops, data); 507 508 /* 'alarm' [R/W] */ 509 if (alarm_fops) 510 proc_create_data(ACPI_SBS_FILE_ALARM, S_IRUGO, *dir, 511 alarm_fops, data); 512 return 0; 513 } 514 515 static void 516 acpi_sbs_remove_fs(struct proc_dir_entry **dir, 517 struct proc_dir_entry *parent_dir) 518 { 519 if (*dir) { 520 remove_proc_entry(ACPI_SBS_FILE_INFO, *dir); 521 remove_proc_entry(ACPI_SBS_FILE_STATE, *dir); 522 remove_proc_entry(ACPI_SBS_FILE_ALARM, *dir); 523 remove_proc_entry((*dir)->name, parent_dir); 524 *dir = NULL; 525 } 526 } 527 528 /* Smart Battery Interface */ 529 static struct proc_dir_entry *acpi_battery_dir = NULL; 530 531 static inline char *acpi_battery_units(struct acpi_battery *battery) 532 { 533 return acpi_battery_mode(battery) ? " mW" : " mA"; 534 } 535 536 537 static int acpi_battery_read_info(struct seq_file *seq, void *offset) 538 { 539 struct acpi_battery *battery = seq->private; 540 struct acpi_sbs *sbs = battery->sbs; 541 int result = 0; 542 543 mutex_lock(&sbs->lock); 544 545 seq_printf(seq, "present: %s\n", 546 (battery->present) ? "yes" : "no"); 547 if (!battery->present) 548 goto end; 549 550 seq_printf(seq, "design capacity: %i%sh\n", 551 battery->design_capacity * acpi_battery_scale(battery), 552 acpi_battery_units(battery)); 553 seq_printf(seq, "last full capacity: %i%sh\n", 554 battery->full_charge_capacity * acpi_battery_scale(battery), 555 acpi_battery_units(battery)); 556 seq_printf(seq, "battery technology: rechargeable\n"); 557 seq_printf(seq, "design voltage: %i mV\n", 558 battery->design_voltage * acpi_battery_vscale(battery)); 559 seq_printf(seq, "design capacity warning: unknown\n"); 560 seq_printf(seq, "design capacity low: unknown\n"); 561 seq_printf(seq, "capacity granularity 1: unknown\n"); 562 seq_printf(seq, "capacity granularity 2: unknown\n"); 563 seq_printf(seq, "model number: %s\n", battery->device_name); 564 seq_printf(seq, "serial number: %i\n", 565 battery->serial_number); 566 seq_printf(seq, "battery type: %s\n", 567 battery->device_chemistry); 568 seq_printf(seq, "OEM info: %s\n", 569 battery->manufacturer_name); 570 end: 571 mutex_unlock(&sbs->lock); 572 return result; 573 } 574 575 static int acpi_battery_info_open_fs(struct inode *inode, struct file *file) 576 { 577 return single_open(file, acpi_battery_read_info, PDE(inode)->data); 578 } 579 580 static int acpi_battery_read_state(struct seq_file *seq, void *offset) 581 { 582 struct acpi_battery *battery = seq->private; 583 struct acpi_sbs *sbs = battery->sbs; 584 int rate; 585 586 mutex_lock(&sbs->lock); 587 seq_printf(seq, "present: %s\n", 588 (battery->present) ? "yes" : "no"); 589 if (!battery->present) 590 goto end; 591 592 acpi_battery_get_state(battery); 593 seq_printf(seq, "capacity state: %s\n", 594 (battery->state & 0x0010) ? "critical" : "ok"); 595 seq_printf(seq, "charging state: %s\n", 596 (battery->rate_now < 0) ? "discharging" : 597 ((battery->rate_now > 0) ? "charging" : "charged")); 598 rate = abs(battery->rate_now) * acpi_battery_ipscale(battery); 599 rate *= (acpi_battery_mode(battery))?(battery->voltage_now * 600 acpi_battery_vscale(battery)/1000):1; 601 seq_printf(seq, "present rate: %d%s\n", rate, 602 acpi_battery_units(battery)); 603 seq_printf(seq, "remaining capacity: %i%sh\n", 604 battery->capacity_now * acpi_battery_scale(battery), 605 acpi_battery_units(battery)); 606 seq_printf(seq, "present voltage: %i mV\n", 607 battery->voltage_now * acpi_battery_vscale(battery)); 608 609 end: 610 mutex_unlock(&sbs->lock); 611 return 0; 612 } 613 614 static int acpi_battery_state_open_fs(struct inode *inode, struct file *file) 615 { 616 return single_open(file, acpi_battery_read_state, PDE(inode)->data); 617 } 618 619 static int acpi_battery_read_alarm(struct seq_file *seq, void *offset) 620 { 621 struct acpi_battery *battery = seq->private; 622 struct acpi_sbs *sbs = battery->sbs; 623 int result = 0; 624 625 mutex_lock(&sbs->lock); 626 627 if (!battery->present) { 628 seq_printf(seq, "present: no\n"); 629 goto end; 630 } 631 632 acpi_battery_get_alarm(battery); 633 seq_printf(seq, "alarm: "); 634 if (battery->alarm_capacity) 635 seq_printf(seq, "%i%sh\n", 636 battery->alarm_capacity * 637 acpi_battery_scale(battery), 638 acpi_battery_units(battery)); 639 else 640 seq_printf(seq, "disabled\n"); 641 end: 642 mutex_unlock(&sbs->lock); 643 return result; 644 } 645 646 static ssize_t 647 acpi_battery_write_alarm(struct file *file, const char __user * buffer, 648 size_t count, loff_t * ppos) 649 { 650 struct seq_file *seq = file->private_data; 651 struct acpi_battery *battery = seq->private; 652 struct acpi_sbs *sbs = battery->sbs; 653 char alarm_string[12] = { '\0' }; 654 int result = 0; 655 mutex_lock(&sbs->lock); 656 if (!battery->present) { 657 result = -ENODEV; 658 goto end; 659 } 660 if (count > sizeof(alarm_string) - 1) { 661 result = -EINVAL; 662 goto end; 663 } 664 if (copy_from_user(alarm_string, buffer, count)) { 665 result = -EFAULT; 666 goto end; 667 } 668 alarm_string[count] = 0; 669 battery->alarm_capacity = simple_strtoul(alarm_string, NULL, 0) / 670 acpi_battery_scale(battery); 671 acpi_battery_set_alarm(battery); 672 end: 673 mutex_unlock(&sbs->lock); 674 if (result) 675 return result; 676 return count; 677 } 678 679 static int acpi_battery_alarm_open_fs(struct inode *inode, struct file *file) 680 { 681 return single_open(file, acpi_battery_read_alarm, PDE(inode)->data); 682 } 683 684 static const struct file_operations acpi_battery_info_fops = { 685 .open = acpi_battery_info_open_fs, 686 .read = seq_read, 687 .llseek = seq_lseek, 688 .release = single_release, 689 .owner = THIS_MODULE, 690 }; 691 692 static const struct file_operations acpi_battery_state_fops = { 693 .open = acpi_battery_state_open_fs, 694 .read = seq_read, 695 .llseek = seq_lseek, 696 .release = single_release, 697 .owner = THIS_MODULE, 698 }; 699 700 static const struct file_operations acpi_battery_alarm_fops = { 701 .open = acpi_battery_alarm_open_fs, 702 .read = seq_read, 703 .write = acpi_battery_write_alarm, 704 .llseek = seq_lseek, 705 .release = single_release, 706 .owner = THIS_MODULE, 707 }; 708 709 /* Legacy AC Adapter Interface */ 710 711 static struct proc_dir_entry *acpi_ac_dir = NULL; 712 713 static int acpi_ac_read_state(struct seq_file *seq, void *offset) 714 { 715 716 struct acpi_sbs *sbs = seq->private; 717 718 mutex_lock(&sbs->lock); 719 720 seq_printf(seq, "state: %s\n", 721 sbs->charger_present ? "on-line" : "off-line"); 722 723 mutex_unlock(&sbs->lock); 724 return 0; 725 } 726 727 static int acpi_ac_state_open_fs(struct inode *inode, struct file *file) 728 { 729 return single_open(file, acpi_ac_read_state, PDE(inode)->data); 730 } 731 732 static const struct file_operations acpi_ac_state_fops = { 733 .open = acpi_ac_state_open_fs, 734 .read = seq_read, 735 .llseek = seq_lseek, 736 .release = single_release, 737 .owner = THIS_MODULE, 738 }; 739 740 #endif 741 742 /* -------------------------------------------------------------------------- 743 Driver Interface 744 -------------------------------------------------------------------------- */ 745 static int acpi_battery_read(struct acpi_battery *battery) 746 { 747 int result = 0, saved_present = battery->present; 748 u16 state; 749 750 if (battery->sbs->manager_present) { 751 result = acpi_smbus_read(battery->sbs->hc, SMBUS_READ_WORD, 752 ACPI_SBS_MANAGER, 0x01, (u8 *)&state); 753 if (!result) 754 battery->present = state & (1 << battery->id); 755 state &= 0x0fff; 756 state |= 1 << (battery->id + 12); 757 acpi_smbus_write(battery->sbs->hc, SMBUS_WRITE_WORD, 758 ACPI_SBS_MANAGER, 0x01, (u8 *)&state, 2); 759 } else if (battery->id == 0) 760 battery->present = 1; 761 if (result || !battery->present) 762 return result; 763 764 if (saved_present != battery->present) { 765 battery->update_time = 0; 766 result = acpi_battery_get_info(battery); 767 if (result) 768 return result; 769 } 770 result = acpi_battery_get_state(battery); 771 return result; 772 } 773 774 /* Smart Battery */ 775 static int acpi_battery_add(struct acpi_sbs *sbs, int id) 776 { 777 struct acpi_battery *battery = &sbs->battery[id]; 778 int result; 779 780 battery->id = id; 781 battery->sbs = sbs; 782 result = acpi_battery_read(battery); 783 if (result) 784 return result; 785 786 sprintf(battery->name, ACPI_BATTERY_DIR_NAME, id); 787 #ifdef CONFIG_ACPI_PROCFS_POWER 788 acpi_sbs_add_fs(&battery->proc_entry, acpi_battery_dir, 789 battery->name, &acpi_battery_info_fops, 790 &acpi_battery_state_fops, &acpi_battery_alarm_fops, 791 battery); 792 #endif 793 #ifdef CONFIG_ACPI_SYSFS_POWER 794 battery->bat.name = battery->name; 795 battery->bat.type = POWER_SUPPLY_TYPE_BATTERY; 796 if (!acpi_battery_mode(battery)) { 797 battery->bat.properties = sbs_charge_battery_props; 798 battery->bat.num_properties = 799 ARRAY_SIZE(sbs_charge_battery_props); 800 } else { 801 battery->bat.properties = sbs_energy_battery_props; 802 battery->bat.num_properties = 803 ARRAY_SIZE(sbs_energy_battery_props); 804 } 805 battery->bat.get_property = acpi_sbs_battery_get_property; 806 result = power_supply_register(&sbs->device->dev, &battery->bat); 807 if (result) 808 goto end; 809 result = device_create_file(battery->bat.dev, &alarm_attr); 810 if (result) 811 goto end; 812 battery->have_sysfs_alarm = 1; 813 end: 814 #endif 815 printk(KERN_INFO PREFIX "%s [%s]: Battery Slot [%s] (battery %s)\n", 816 ACPI_SBS_DEVICE_NAME, acpi_device_bid(sbs->device), 817 battery->name, battery->present ? "present" : "absent"); 818 return result; 819 } 820 821 static void acpi_battery_remove(struct acpi_sbs *sbs, int id) 822 { 823 struct acpi_battery *battery = &sbs->battery[id]; 824 #ifdef CONFIG_ACPI_SYSFS_POWER 825 if (battery->bat.dev) { 826 if (battery->have_sysfs_alarm) 827 device_remove_file(battery->bat.dev, &alarm_attr); 828 power_supply_unregister(&battery->bat); 829 } 830 #endif 831 #ifdef CONFIG_ACPI_PROCFS_POWER 832 if (battery->proc_entry) 833 acpi_sbs_remove_fs(&battery->proc_entry, acpi_battery_dir); 834 #endif 835 } 836 837 static int acpi_charger_add(struct acpi_sbs *sbs) 838 { 839 int result; 840 841 result = acpi_ac_get_present(sbs); 842 if (result) 843 goto end; 844 #ifdef CONFIG_ACPI_PROCFS_POWER 845 result = acpi_sbs_add_fs(&sbs->charger_entry, acpi_ac_dir, 846 ACPI_AC_DIR_NAME, NULL, 847 &acpi_ac_state_fops, NULL, sbs); 848 if (result) 849 goto end; 850 #endif 851 #ifdef CONFIG_ACPI_SYSFS_POWER 852 sbs->charger.name = "sbs-charger"; 853 sbs->charger.type = POWER_SUPPLY_TYPE_MAINS; 854 sbs->charger.properties = sbs_ac_props; 855 sbs->charger.num_properties = ARRAY_SIZE(sbs_ac_props); 856 sbs->charger.get_property = sbs_get_ac_property; 857 power_supply_register(&sbs->device->dev, &sbs->charger); 858 #endif 859 printk(KERN_INFO PREFIX "%s [%s]: AC Adapter [%s] (%s)\n", 860 ACPI_SBS_DEVICE_NAME, acpi_device_bid(sbs->device), 861 ACPI_AC_DIR_NAME, sbs->charger_present ? "on-line" : "off-line"); 862 end: 863 return result; 864 } 865 866 static void acpi_charger_remove(struct acpi_sbs *sbs) 867 { 868 #ifdef CONFIG_ACPI_SYSFS_POWER 869 if (sbs->charger.dev) 870 power_supply_unregister(&sbs->charger); 871 #endif 872 #ifdef CONFIG_ACPI_PROCFS_POWER 873 if (sbs->charger_entry) 874 acpi_sbs_remove_fs(&sbs->charger_entry, acpi_ac_dir); 875 #endif 876 } 877 878 static void acpi_sbs_callback(void *context) 879 { 880 int id; 881 struct acpi_sbs *sbs = context; 882 struct acpi_battery *bat; 883 u8 saved_charger_state = sbs->charger_present; 884 u8 saved_battery_state; 885 acpi_ac_get_present(sbs); 886 if (sbs->charger_present != saved_charger_state) { 887 #ifdef CONFIG_ACPI_PROC_EVENT 888 acpi_bus_generate_proc_event4(ACPI_AC_CLASS, ACPI_AC_DIR_NAME, 889 ACPI_SBS_NOTIFY_STATUS, 890 sbs->charger_present); 891 #endif 892 #ifdef CONFIG_ACPI_SYSFS_POWER 893 kobject_uevent(&sbs->charger.dev->kobj, KOBJ_CHANGE); 894 #endif 895 } 896 if (sbs->manager_present) { 897 for (id = 0; id < MAX_SBS_BAT; ++id) { 898 if (!(sbs->batteries_supported & (1 << id))) 899 continue; 900 bat = &sbs->battery[id]; 901 saved_battery_state = bat->present; 902 acpi_battery_read(bat); 903 if (saved_battery_state == bat->present) 904 continue; 905 #ifdef CONFIG_ACPI_PROC_EVENT 906 acpi_bus_generate_proc_event4(ACPI_BATTERY_CLASS, 907 bat->name, 908 ACPI_SBS_NOTIFY_STATUS, 909 bat->present); 910 #endif 911 #ifdef CONFIG_ACPI_SYSFS_POWER 912 kobject_uevent(&bat->bat.dev->kobj, KOBJ_CHANGE); 913 #endif 914 } 915 } 916 } 917 918 static int acpi_sbs_remove(struct acpi_device *device, int type); 919 920 static int acpi_sbs_add(struct acpi_device *device) 921 { 922 struct acpi_sbs *sbs; 923 int result = 0; 924 int id; 925 926 sbs = kzalloc(sizeof(struct acpi_sbs), GFP_KERNEL); 927 if (!sbs) { 928 result = -ENOMEM; 929 goto end; 930 } 931 932 mutex_init(&sbs->lock); 933 934 sbs->hc = acpi_driver_data(device->parent); 935 sbs->device = device; 936 strcpy(acpi_device_name(device), ACPI_SBS_DEVICE_NAME); 937 strcpy(acpi_device_class(device), ACPI_SBS_CLASS); 938 device->driver_data = sbs; 939 940 result = acpi_charger_add(sbs); 941 if (result) 942 goto end; 943 944 result = acpi_manager_get_info(sbs); 945 if (!result) { 946 sbs->manager_present = 1; 947 for (id = 0; id < MAX_SBS_BAT; ++id) 948 if ((sbs->batteries_supported & (1 << id))) 949 acpi_battery_add(sbs, id); 950 } else 951 acpi_battery_add(sbs, 0); 952 acpi_smbus_register_callback(sbs->hc, acpi_sbs_callback, sbs); 953 end: 954 if (result) 955 acpi_sbs_remove(device, 0); 956 return result; 957 } 958 959 static int acpi_sbs_remove(struct acpi_device *device, int type) 960 { 961 struct acpi_sbs *sbs; 962 int id; 963 964 if (!device) 965 return -EINVAL; 966 sbs = acpi_driver_data(device); 967 if (!sbs) 968 return -EINVAL; 969 mutex_lock(&sbs->lock); 970 acpi_smbus_unregister_callback(sbs->hc); 971 for (id = 0; id < MAX_SBS_BAT; ++id) 972 acpi_battery_remove(sbs, id); 973 acpi_charger_remove(sbs); 974 mutex_unlock(&sbs->lock); 975 mutex_destroy(&sbs->lock); 976 kfree(sbs); 977 return 0; 978 } 979 980 static void acpi_sbs_rmdirs(void) 981 { 982 #ifdef CONFIG_ACPI_PROCFS_POWER 983 if (acpi_ac_dir) { 984 acpi_unlock_ac_dir(acpi_ac_dir); 985 acpi_ac_dir = NULL; 986 } 987 if (acpi_battery_dir) { 988 acpi_unlock_battery_dir(acpi_battery_dir); 989 acpi_battery_dir = NULL; 990 } 991 #endif 992 } 993 994 static int acpi_sbs_resume(struct acpi_device *device) 995 { 996 struct acpi_sbs *sbs; 997 if (!device) 998 return -EINVAL; 999 sbs = device->driver_data; 1000 acpi_sbs_callback(sbs); 1001 return 0; 1002 } 1003 1004 static struct acpi_driver acpi_sbs_driver = { 1005 .name = "sbs", 1006 .class = ACPI_SBS_CLASS, 1007 .ids = sbs_device_ids, 1008 .ops = { 1009 .add = acpi_sbs_add, 1010 .remove = acpi_sbs_remove, 1011 .resume = acpi_sbs_resume, 1012 }, 1013 }; 1014 1015 static int __init acpi_sbs_init(void) 1016 { 1017 int result = 0; 1018 1019 if (acpi_disabled) 1020 return -ENODEV; 1021 #ifdef CONFIG_ACPI_PROCFS_POWER 1022 acpi_ac_dir = acpi_lock_ac_dir(); 1023 if (!acpi_ac_dir) 1024 return -ENODEV; 1025 acpi_battery_dir = acpi_lock_battery_dir(); 1026 if (!acpi_battery_dir) { 1027 acpi_sbs_rmdirs(); 1028 return -ENODEV; 1029 } 1030 #endif 1031 result = acpi_bus_register_driver(&acpi_sbs_driver); 1032 if (result < 0) { 1033 acpi_sbs_rmdirs(); 1034 return -ENODEV; 1035 } 1036 return 0; 1037 } 1038 1039 static void __exit acpi_sbs_exit(void) 1040 { 1041 acpi_bus_unregister_driver(&acpi_sbs_driver); 1042 acpi_sbs_rmdirs(); 1043 return; 1044 } 1045 1046 module_init(acpi_sbs_init); 1047 module_exit(acpi_sbs_exit); 1048