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 int acpi_sbs_remove(struct acpi_device *device, int type); 134 static int acpi_battery_get_state(struct acpi_battery *battery); 135 136 static inline int battery_scale(int log) 137 { 138 int scale = 1; 139 while (log--) 140 scale *= 10; 141 return scale; 142 } 143 144 static inline int acpi_battery_vscale(struct acpi_battery *battery) 145 { 146 return battery_scale((battery->spec & 0x0f00) >> 8); 147 } 148 149 static inline int acpi_battery_ipscale(struct acpi_battery *battery) 150 { 151 return battery_scale((battery->spec & 0xf000) >> 12); 152 } 153 154 static inline int acpi_battery_mode(struct acpi_battery *battery) 155 { 156 return (battery->mode & 0x8000); 157 } 158 159 static inline int acpi_battery_scale(struct acpi_battery *battery) 160 { 161 return (acpi_battery_mode(battery) ? 10 : 1) * 162 acpi_battery_ipscale(battery); 163 } 164 165 static int sbs_get_ac_property(struct power_supply *psy, 166 enum power_supply_property psp, 167 union power_supply_propval *val) 168 { 169 struct acpi_sbs *sbs = to_acpi_sbs(psy); 170 switch (psp) { 171 case POWER_SUPPLY_PROP_ONLINE: 172 val->intval = sbs->charger_present; 173 break; 174 default: 175 return -EINVAL; 176 } 177 return 0; 178 } 179 180 static int acpi_battery_technology(struct acpi_battery *battery) 181 { 182 if (!strcasecmp("NiCd", battery->device_chemistry)) 183 return POWER_SUPPLY_TECHNOLOGY_NiCd; 184 if (!strcasecmp("NiMH", battery->device_chemistry)) 185 return POWER_SUPPLY_TECHNOLOGY_NiMH; 186 if (!strcasecmp("LION", battery->device_chemistry)) 187 return POWER_SUPPLY_TECHNOLOGY_LION; 188 if (!strcasecmp("LiP", battery->device_chemistry)) 189 return POWER_SUPPLY_TECHNOLOGY_LIPO; 190 return POWER_SUPPLY_TECHNOLOGY_UNKNOWN; 191 } 192 193 static int acpi_sbs_battery_get_property(struct power_supply *psy, 194 enum power_supply_property psp, 195 union power_supply_propval *val) 196 { 197 struct acpi_battery *battery = to_acpi_battery(psy); 198 199 if ((!battery->present) && psp != POWER_SUPPLY_PROP_PRESENT) 200 return -ENODEV; 201 202 acpi_battery_get_state(battery); 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_CYCLE_COUNT: 219 val->intval = battery->cycle_count; 220 break; 221 case POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN: 222 val->intval = battery->design_voltage * 223 acpi_battery_vscale(battery) * 1000; 224 break; 225 case POWER_SUPPLY_PROP_VOLTAGE_NOW: 226 val->intval = battery->voltage_now * 227 acpi_battery_vscale(battery) * 1000; 228 break; 229 case POWER_SUPPLY_PROP_CURRENT_NOW: 230 case POWER_SUPPLY_PROP_POWER_NOW: 231 val->intval = abs(battery->rate_now) * 232 acpi_battery_ipscale(battery) * 1000; 233 val->intval *= (acpi_battery_mode(battery)) ? 234 (battery->voltage_now * 235 acpi_battery_vscale(battery) / 1000) : 1; 236 break; 237 case POWER_SUPPLY_PROP_CURRENT_AVG: 238 case POWER_SUPPLY_PROP_POWER_AVG: 239 val->intval = abs(battery->rate_avg) * 240 acpi_battery_ipscale(battery) * 1000; 241 val->intval *= (acpi_battery_mode(battery)) ? 242 (battery->voltage_now * 243 acpi_battery_vscale(battery) / 1000) : 1; 244 break; 245 case POWER_SUPPLY_PROP_CAPACITY: 246 val->intval = battery->state_of_charge; 247 break; 248 case POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN: 249 case POWER_SUPPLY_PROP_ENERGY_FULL_DESIGN: 250 val->intval = battery->design_capacity * 251 acpi_battery_scale(battery) * 1000; 252 break; 253 case POWER_SUPPLY_PROP_CHARGE_FULL: 254 case POWER_SUPPLY_PROP_ENERGY_FULL: 255 val->intval = battery->full_charge_capacity * 256 acpi_battery_scale(battery) * 1000; 257 break; 258 case POWER_SUPPLY_PROP_CHARGE_NOW: 259 case POWER_SUPPLY_PROP_ENERGY_NOW: 260 val->intval = battery->capacity_now * 261 acpi_battery_scale(battery) * 1000; 262 break; 263 case POWER_SUPPLY_PROP_TEMP: 264 val->intval = battery->temp_now - 2730; // dK -> dC 265 break; 266 case POWER_SUPPLY_PROP_MODEL_NAME: 267 val->strval = battery->device_name; 268 break; 269 case POWER_SUPPLY_PROP_MANUFACTURER: 270 val->strval = battery->manufacturer_name; 271 break; 272 default: 273 return -EINVAL; 274 } 275 return 0; 276 } 277 278 static enum power_supply_property sbs_ac_props[] = { 279 POWER_SUPPLY_PROP_ONLINE, 280 }; 281 282 static enum power_supply_property sbs_charge_battery_props[] = { 283 POWER_SUPPLY_PROP_STATUS, 284 POWER_SUPPLY_PROP_PRESENT, 285 POWER_SUPPLY_PROP_TECHNOLOGY, 286 POWER_SUPPLY_PROP_CYCLE_COUNT, 287 POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN, 288 POWER_SUPPLY_PROP_VOLTAGE_NOW, 289 POWER_SUPPLY_PROP_CURRENT_NOW, 290 POWER_SUPPLY_PROP_CURRENT_AVG, 291 POWER_SUPPLY_PROP_CAPACITY, 292 POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN, 293 POWER_SUPPLY_PROP_CHARGE_FULL, 294 POWER_SUPPLY_PROP_CHARGE_NOW, 295 POWER_SUPPLY_PROP_TEMP, 296 POWER_SUPPLY_PROP_MODEL_NAME, 297 POWER_SUPPLY_PROP_MANUFACTURER, 298 }; 299 300 static enum power_supply_property sbs_energy_battery_props[] = { 301 POWER_SUPPLY_PROP_STATUS, 302 POWER_SUPPLY_PROP_PRESENT, 303 POWER_SUPPLY_PROP_TECHNOLOGY, 304 POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN, 305 POWER_SUPPLY_PROP_VOLTAGE_NOW, 306 POWER_SUPPLY_PROP_CURRENT_NOW, 307 POWER_SUPPLY_PROP_CURRENT_AVG, 308 POWER_SUPPLY_PROP_POWER_NOW, 309 POWER_SUPPLY_PROP_POWER_AVG, 310 POWER_SUPPLY_PROP_CAPACITY, 311 POWER_SUPPLY_PROP_ENERGY_FULL_DESIGN, 312 POWER_SUPPLY_PROP_ENERGY_FULL, 313 POWER_SUPPLY_PROP_ENERGY_NOW, 314 POWER_SUPPLY_PROP_TEMP, 315 POWER_SUPPLY_PROP_MODEL_NAME, 316 POWER_SUPPLY_PROP_MANUFACTURER, 317 }; 318 319 320 /* -------------------------------------------------------------------------- 321 Smart Battery System Management 322 -------------------------------------------------------------------------- */ 323 324 struct acpi_battery_reader { 325 u8 command; /* command for battery */ 326 u8 mode; /* word or block? */ 327 size_t offset; /* offset inside struct acpi_sbs_battery */ 328 }; 329 330 static struct acpi_battery_reader info_readers[] = { 331 {0x01, SMBUS_READ_WORD, offsetof(struct acpi_battery, alarm_capacity)}, 332 {0x03, SMBUS_READ_WORD, offsetof(struct acpi_battery, mode)}, 333 {0x10, SMBUS_READ_WORD, offsetof(struct acpi_battery, full_charge_capacity)}, 334 {0x17, SMBUS_READ_WORD, offsetof(struct acpi_battery, cycle_count)}, 335 {0x18, SMBUS_READ_WORD, offsetof(struct acpi_battery, design_capacity)}, 336 {0x19, SMBUS_READ_WORD, offsetof(struct acpi_battery, design_voltage)}, 337 {0x1a, SMBUS_READ_WORD, offsetof(struct acpi_battery, spec)}, 338 {0x1c, SMBUS_READ_WORD, offsetof(struct acpi_battery, serial_number)}, 339 {0x20, SMBUS_READ_BLOCK, offsetof(struct acpi_battery, manufacturer_name)}, 340 {0x21, SMBUS_READ_BLOCK, offsetof(struct acpi_battery, device_name)}, 341 {0x22, SMBUS_READ_BLOCK, offsetof(struct acpi_battery, device_chemistry)}, 342 }; 343 344 static struct acpi_battery_reader state_readers[] = { 345 {0x08, SMBUS_READ_WORD, offsetof(struct acpi_battery, temp_now)}, 346 {0x09, SMBUS_READ_WORD, offsetof(struct acpi_battery, voltage_now)}, 347 {0x0a, SMBUS_READ_WORD, offsetof(struct acpi_battery, rate_now)}, 348 {0x0b, SMBUS_READ_WORD, offsetof(struct acpi_battery, rate_avg)}, 349 {0x0f, SMBUS_READ_WORD, offsetof(struct acpi_battery, capacity_now)}, 350 {0x0e, SMBUS_READ_WORD, offsetof(struct acpi_battery, state_of_charge)}, 351 {0x16, SMBUS_READ_WORD, offsetof(struct acpi_battery, state)}, 352 }; 353 354 static int acpi_manager_get_info(struct acpi_sbs *sbs) 355 { 356 int result = 0; 357 u16 battery_system_info; 358 359 result = acpi_smbus_read(sbs->hc, SMBUS_READ_WORD, ACPI_SBS_MANAGER, 360 0x04, (u8 *)&battery_system_info); 361 if (!result) 362 sbs->batteries_supported = battery_system_info & 0x000f; 363 return result; 364 } 365 366 static int acpi_battery_get_info(struct acpi_battery *battery) 367 { 368 int i, result = 0; 369 370 for (i = 0; i < ARRAY_SIZE(info_readers); ++i) { 371 result = acpi_smbus_read(battery->sbs->hc, 372 info_readers[i].mode, 373 ACPI_SBS_BATTERY, 374 info_readers[i].command, 375 (u8 *) battery + 376 info_readers[i].offset); 377 if (result) 378 break; 379 } 380 return result; 381 } 382 383 static int acpi_battery_get_state(struct acpi_battery *battery) 384 { 385 int i, result = 0; 386 387 if (battery->update_time && 388 time_before(jiffies, battery->update_time + 389 msecs_to_jiffies(cache_time))) 390 return 0; 391 for (i = 0; i < ARRAY_SIZE(state_readers); ++i) { 392 result = acpi_smbus_read(battery->sbs->hc, 393 state_readers[i].mode, 394 ACPI_SBS_BATTERY, 395 state_readers[i].command, 396 (u8 *)battery + 397 state_readers[i].offset); 398 if (result) 399 goto end; 400 } 401 end: 402 battery->update_time = jiffies; 403 return result; 404 } 405 406 static int acpi_battery_get_alarm(struct acpi_battery *battery) 407 { 408 return acpi_smbus_read(battery->sbs->hc, SMBUS_READ_WORD, 409 ACPI_SBS_BATTERY, 0x01, 410 (u8 *)&battery->alarm_capacity); 411 } 412 413 static int acpi_battery_set_alarm(struct acpi_battery *battery) 414 { 415 struct acpi_sbs *sbs = battery->sbs; 416 u16 value, sel = 1 << (battery->id + 12); 417 418 int ret; 419 420 421 if (sbs->manager_present) { 422 ret = acpi_smbus_read(sbs->hc, SMBUS_READ_WORD, ACPI_SBS_MANAGER, 423 0x01, (u8 *)&value); 424 if (ret) 425 goto end; 426 if ((value & 0xf000) != sel) { 427 value &= 0x0fff; 428 value |= sel; 429 ret = acpi_smbus_write(sbs->hc, SMBUS_WRITE_WORD, 430 ACPI_SBS_MANAGER, 431 0x01, (u8 *)&value, 2); 432 if (ret) 433 goto end; 434 } 435 } 436 ret = acpi_smbus_write(sbs->hc, SMBUS_WRITE_WORD, ACPI_SBS_BATTERY, 437 0x01, (u8 *)&battery->alarm_capacity, 2); 438 end: 439 return ret; 440 } 441 442 static int acpi_ac_get_present(struct acpi_sbs *sbs) 443 { 444 int result; 445 u16 status; 446 447 result = acpi_smbus_read(sbs->hc, SMBUS_READ_WORD, ACPI_SBS_CHARGER, 448 0x13, (u8 *) & status); 449 if (!result) 450 sbs->charger_present = (status >> 15) & 0x1; 451 return result; 452 } 453 454 static ssize_t acpi_battery_alarm_show(struct device *dev, 455 struct device_attribute *attr, 456 char *buf) 457 { 458 struct acpi_battery *battery = to_acpi_battery(dev_get_drvdata(dev)); 459 acpi_battery_get_alarm(battery); 460 return sprintf(buf, "%d\n", battery->alarm_capacity * 461 acpi_battery_scale(battery) * 1000); 462 } 463 464 static ssize_t acpi_battery_alarm_store(struct device *dev, 465 struct device_attribute *attr, 466 const char *buf, size_t count) 467 { 468 unsigned long x; 469 struct acpi_battery *battery = to_acpi_battery(dev_get_drvdata(dev)); 470 if (sscanf(buf, "%ld\n", &x) == 1) 471 battery->alarm_capacity = x / 472 (1000 * acpi_battery_scale(battery)); 473 if (battery->present) 474 acpi_battery_set_alarm(battery); 475 return count; 476 } 477 478 static struct device_attribute alarm_attr = { 479 .attr = {.name = "alarm", .mode = 0644}, 480 .show = acpi_battery_alarm_show, 481 .store = acpi_battery_alarm_store, 482 }; 483 484 /* -------------------------------------------------------------------------- 485 FS Interface (/proc/acpi) 486 -------------------------------------------------------------------------- */ 487 488 #ifdef CONFIG_ACPI_PROCFS_POWER 489 /* Generic Routines */ 490 static int 491 acpi_sbs_add_fs(struct proc_dir_entry **dir, 492 struct proc_dir_entry *parent_dir, 493 char *dir_name, 494 const struct file_operations *info_fops, 495 const struct file_operations *state_fops, 496 const struct file_operations *alarm_fops, void *data) 497 { 498 printk(KERN_WARNING PREFIX "Deprecated procfs I/F for SBS is loaded," 499 " please retry with CONFIG_ACPI_PROCFS_POWER cleared\n"); 500 if (!*dir) { 501 *dir = proc_mkdir(dir_name, parent_dir); 502 if (!*dir) { 503 return -ENODEV; 504 } 505 } 506 507 /* 'info' [R] */ 508 if (info_fops) 509 proc_create_data(ACPI_SBS_FILE_INFO, S_IRUGO, *dir, 510 info_fops, data); 511 512 /* 'state' [R] */ 513 if (state_fops) 514 proc_create_data(ACPI_SBS_FILE_STATE, S_IRUGO, *dir, 515 state_fops, data); 516 517 /* 'alarm' [R/W] */ 518 if (alarm_fops) 519 proc_create_data(ACPI_SBS_FILE_ALARM, S_IRUGO, *dir, 520 alarm_fops, data); 521 return 0; 522 } 523 524 static void 525 acpi_sbs_remove_fs(struct proc_dir_entry **dir, 526 struct proc_dir_entry *parent_dir) 527 { 528 if (*dir) { 529 remove_proc_entry(ACPI_SBS_FILE_INFO, *dir); 530 remove_proc_entry(ACPI_SBS_FILE_STATE, *dir); 531 remove_proc_entry(ACPI_SBS_FILE_ALARM, *dir); 532 remove_proc_entry((*dir)->name, parent_dir); 533 *dir = NULL; 534 } 535 } 536 537 /* Smart Battery Interface */ 538 static struct proc_dir_entry *acpi_battery_dir = NULL; 539 540 static inline char *acpi_battery_units(struct acpi_battery *battery) 541 { 542 return acpi_battery_mode(battery) ? " mW" : " mA"; 543 } 544 545 546 static int acpi_battery_read_info(struct seq_file *seq, void *offset) 547 { 548 struct acpi_battery *battery = seq->private; 549 struct acpi_sbs *sbs = battery->sbs; 550 int result = 0; 551 552 mutex_lock(&sbs->lock); 553 554 seq_printf(seq, "present: %s\n", 555 (battery->present) ? "yes" : "no"); 556 if (!battery->present) 557 goto end; 558 559 seq_printf(seq, "design capacity: %i%sh\n", 560 battery->design_capacity * acpi_battery_scale(battery), 561 acpi_battery_units(battery)); 562 seq_printf(seq, "last full capacity: %i%sh\n", 563 battery->full_charge_capacity * acpi_battery_scale(battery), 564 acpi_battery_units(battery)); 565 seq_printf(seq, "battery technology: rechargeable\n"); 566 seq_printf(seq, "design voltage: %i mV\n", 567 battery->design_voltage * acpi_battery_vscale(battery)); 568 seq_printf(seq, "design capacity warning: unknown\n"); 569 seq_printf(seq, "design capacity low: unknown\n"); 570 seq_printf(seq, "cycle count: %i\n", battery->cycle_count); 571 seq_printf(seq, "capacity granularity 1: unknown\n"); 572 seq_printf(seq, "capacity granularity 2: unknown\n"); 573 seq_printf(seq, "model number: %s\n", battery->device_name); 574 seq_printf(seq, "serial number: %i\n", 575 battery->serial_number); 576 seq_printf(seq, "battery type: %s\n", 577 battery->device_chemistry); 578 seq_printf(seq, "OEM info: %s\n", 579 battery->manufacturer_name); 580 end: 581 mutex_unlock(&sbs->lock); 582 return result; 583 } 584 585 static int acpi_battery_info_open_fs(struct inode *inode, struct file *file) 586 { 587 return single_open(file, acpi_battery_read_info, PDE(inode)->data); 588 } 589 590 static int acpi_battery_read_state(struct seq_file *seq, void *offset) 591 { 592 struct acpi_battery *battery = seq->private; 593 struct acpi_sbs *sbs = battery->sbs; 594 int rate; 595 596 mutex_lock(&sbs->lock); 597 seq_printf(seq, "present: %s\n", 598 (battery->present) ? "yes" : "no"); 599 if (!battery->present) 600 goto end; 601 602 acpi_battery_get_state(battery); 603 seq_printf(seq, "capacity state: %s\n", 604 (battery->state & 0x0010) ? "critical" : "ok"); 605 seq_printf(seq, "charging state: %s\n", 606 (battery->rate_now < 0) ? "discharging" : 607 ((battery->rate_now > 0) ? "charging" : "charged")); 608 rate = abs(battery->rate_now) * acpi_battery_ipscale(battery); 609 rate *= (acpi_battery_mode(battery))?(battery->voltage_now * 610 acpi_battery_vscale(battery)/1000):1; 611 seq_printf(seq, "present rate: %d%s\n", rate, 612 acpi_battery_units(battery)); 613 seq_printf(seq, "remaining capacity: %i%sh\n", 614 battery->capacity_now * acpi_battery_scale(battery), 615 acpi_battery_units(battery)); 616 seq_printf(seq, "present voltage: %i mV\n", 617 battery->voltage_now * acpi_battery_vscale(battery)); 618 619 end: 620 mutex_unlock(&sbs->lock); 621 return 0; 622 } 623 624 static int acpi_battery_state_open_fs(struct inode *inode, struct file *file) 625 { 626 return single_open(file, acpi_battery_read_state, PDE(inode)->data); 627 } 628 629 static int acpi_battery_read_alarm(struct seq_file *seq, void *offset) 630 { 631 struct acpi_battery *battery = seq->private; 632 struct acpi_sbs *sbs = battery->sbs; 633 int result = 0; 634 635 mutex_lock(&sbs->lock); 636 637 if (!battery->present) { 638 seq_printf(seq, "present: no\n"); 639 goto end; 640 } 641 642 acpi_battery_get_alarm(battery); 643 seq_printf(seq, "alarm: "); 644 if (battery->alarm_capacity) 645 seq_printf(seq, "%i%sh\n", 646 battery->alarm_capacity * 647 acpi_battery_scale(battery), 648 acpi_battery_units(battery)); 649 else 650 seq_printf(seq, "disabled\n"); 651 end: 652 mutex_unlock(&sbs->lock); 653 return result; 654 } 655 656 static ssize_t 657 acpi_battery_write_alarm(struct file *file, const char __user * buffer, 658 size_t count, loff_t * ppos) 659 { 660 struct seq_file *seq = file->private_data; 661 struct acpi_battery *battery = seq->private; 662 struct acpi_sbs *sbs = battery->sbs; 663 char alarm_string[12] = { '\0' }; 664 int result = 0; 665 mutex_lock(&sbs->lock); 666 if (!battery->present) { 667 result = -ENODEV; 668 goto end; 669 } 670 if (count > sizeof(alarm_string) - 1) { 671 result = -EINVAL; 672 goto end; 673 } 674 if (copy_from_user(alarm_string, buffer, count)) { 675 result = -EFAULT; 676 goto end; 677 } 678 alarm_string[count] = 0; 679 battery->alarm_capacity = simple_strtoul(alarm_string, NULL, 0) / 680 acpi_battery_scale(battery); 681 acpi_battery_set_alarm(battery); 682 end: 683 mutex_unlock(&sbs->lock); 684 if (result) 685 return result; 686 return count; 687 } 688 689 static int acpi_battery_alarm_open_fs(struct inode *inode, struct file *file) 690 { 691 return single_open(file, acpi_battery_read_alarm, PDE(inode)->data); 692 } 693 694 static const struct file_operations acpi_battery_info_fops = { 695 .open = acpi_battery_info_open_fs, 696 .read = seq_read, 697 .llseek = seq_lseek, 698 .release = single_release, 699 .owner = THIS_MODULE, 700 }; 701 702 static const struct file_operations acpi_battery_state_fops = { 703 .open = acpi_battery_state_open_fs, 704 .read = seq_read, 705 .llseek = seq_lseek, 706 .release = single_release, 707 .owner = THIS_MODULE, 708 }; 709 710 static const struct file_operations acpi_battery_alarm_fops = { 711 .open = acpi_battery_alarm_open_fs, 712 .read = seq_read, 713 .write = acpi_battery_write_alarm, 714 .llseek = seq_lseek, 715 .release = single_release, 716 .owner = THIS_MODULE, 717 }; 718 719 /* Legacy AC Adapter Interface */ 720 721 static struct proc_dir_entry *acpi_ac_dir = NULL; 722 723 static int acpi_ac_read_state(struct seq_file *seq, void *offset) 724 { 725 726 struct acpi_sbs *sbs = seq->private; 727 728 mutex_lock(&sbs->lock); 729 730 seq_printf(seq, "state: %s\n", 731 sbs->charger_present ? "on-line" : "off-line"); 732 733 mutex_unlock(&sbs->lock); 734 return 0; 735 } 736 737 static int acpi_ac_state_open_fs(struct inode *inode, struct file *file) 738 { 739 return single_open(file, acpi_ac_read_state, PDE(inode)->data); 740 } 741 742 static const struct file_operations acpi_ac_state_fops = { 743 .open = acpi_ac_state_open_fs, 744 .read = seq_read, 745 .llseek = seq_lseek, 746 .release = single_release, 747 .owner = THIS_MODULE, 748 }; 749 750 #endif 751 752 /* -------------------------------------------------------------------------- 753 Driver Interface 754 -------------------------------------------------------------------------- */ 755 static int acpi_battery_read(struct acpi_battery *battery) 756 { 757 int result = 0, saved_present = battery->present; 758 u16 state; 759 760 if (battery->sbs->manager_present) { 761 result = acpi_smbus_read(battery->sbs->hc, SMBUS_READ_WORD, 762 ACPI_SBS_MANAGER, 0x01, (u8 *)&state); 763 if (!result) 764 battery->present = state & (1 << battery->id); 765 state &= 0x0fff; 766 state |= 1 << (battery->id + 12); 767 acpi_smbus_write(battery->sbs->hc, SMBUS_WRITE_WORD, 768 ACPI_SBS_MANAGER, 0x01, (u8 *)&state, 2); 769 } else if (battery->id == 0) 770 battery->present = 1; 771 if (result || !battery->present) 772 return result; 773 774 if (saved_present != battery->present) { 775 battery->update_time = 0; 776 result = acpi_battery_get_info(battery); 777 if (result) 778 return result; 779 } 780 result = acpi_battery_get_state(battery); 781 return result; 782 } 783 784 /* Smart Battery */ 785 static int acpi_battery_add(struct acpi_sbs *sbs, int id) 786 { 787 struct acpi_battery *battery = &sbs->battery[id]; 788 int result; 789 790 battery->id = id; 791 battery->sbs = sbs; 792 result = acpi_battery_read(battery); 793 if (result) 794 return result; 795 796 sprintf(battery->name, ACPI_BATTERY_DIR_NAME, id); 797 #ifdef CONFIG_ACPI_PROCFS_POWER 798 acpi_sbs_add_fs(&battery->proc_entry, acpi_battery_dir, 799 battery->name, &acpi_battery_info_fops, 800 &acpi_battery_state_fops, &acpi_battery_alarm_fops, 801 battery); 802 #endif 803 battery->bat.name = battery->name; 804 battery->bat.type = POWER_SUPPLY_TYPE_BATTERY; 805 if (!acpi_battery_mode(battery)) { 806 battery->bat.properties = sbs_charge_battery_props; 807 battery->bat.num_properties = 808 ARRAY_SIZE(sbs_charge_battery_props); 809 } else { 810 battery->bat.properties = sbs_energy_battery_props; 811 battery->bat.num_properties = 812 ARRAY_SIZE(sbs_energy_battery_props); 813 } 814 battery->bat.get_property = acpi_sbs_battery_get_property; 815 result = power_supply_register(&sbs->device->dev, &battery->bat); 816 if (result) 817 goto end; 818 result = device_create_file(battery->bat.dev, &alarm_attr); 819 if (result) 820 goto end; 821 battery->have_sysfs_alarm = 1; 822 end: 823 printk(KERN_INFO PREFIX "%s [%s]: Battery Slot [%s] (battery %s)\n", 824 ACPI_SBS_DEVICE_NAME, acpi_device_bid(sbs->device), 825 battery->name, battery->present ? "present" : "absent"); 826 return result; 827 } 828 829 static void acpi_battery_remove(struct acpi_sbs *sbs, int id) 830 { 831 struct acpi_battery *battery = &sbs->battery[id]; 832 833 if (battery->bat.dev) { 834 if (battery->have_sysfs_alarm) 835 device_remove_file(battery->bat.dev, &alarm_attr); 836 power_supply_unregister(&battery->bat); 837 } 838 #ifdef CONFIG_ACPI_PROCFS_POWER 839 if (battery->proc_entry) 840 acpi_sbs_remove_fs(&battery->proc_entry, acpi_battery_dir); 841 #endif 842 } 843 844 static int acpi_charger_add(struct acpi_sbs *sbs) 845 { 846 int result; 847 848 result = acpi_ac_get_present(sbs); 849 if (result) 850 goto end; 851 #ifdef CONFIG_ACPI_PROCFS_POWER 852 result = acpi_sbs_add_fs(&sbs->charger_entry, acpi_ac_dir, 853 ACPI_AC_DIR_NAME, NULL, 854 &acpi_ac_state_fops, NULL, sbs); 855 if (result) 856 goto end; 857 #endif 858 sbs->charger.name = "sbs-charger"; 859 sbs->charger.type = POWER_SUPPLY_TYPE_MAINS; 860 sbs->charger.properties = sbs_ac_props; 861 sbs->charger.num_properties = ARRAY_SIZE(sbs_ac_props); 862 sbs->charger.get_property = sbs_get_ac_property; 863 power_supply_register(&sbs->device->dev, &sbs->charger); 864 printk(KERN_INFO PREFIX "%s [%s]: AC Adapter [%s] (%s)\n", 865 ACPI_SBS_DEVICE_NAME, acpi_device_bid(sbs->device), 866 ACPI_AC_DIR_NAME, sbs->charger_present ? "on-line" : "off-line"); 867 end: 868 return result; 869 } 870 871 static void acpi_charger_remove(struct acpi_sbs *sbs) 872 { 873 if (sbs->charger.dev) 874 power_supply_unregister(&sbs->charger); 875 #ifdef CONFIG_ACPI_PROCFS_POWER 876 if (sbs->charger_entry) 877 acpi_sbs_remove_fs(&sbs->charger_entry, acpi_ac_dir); 878 #endif 879 } 880 881 static void acpi_sbs_callback(void *context) 882 { 883 int id; 884 struct acpi_sbs *sbs = context; 885 struct acpi_battery *bat; 886 u8 saved_charger_state = sbs->charger_present; 887 u8 saved_battery_state; 888 acpi_ac_get_present(sbs); 889 if (sbs->charger_present != saved_charger_state) { 890 #ifdef CONFIG_ACPI_PROC_EVENT 891 acpi_bus_generate_proc_event4(ACPI_AC_CLASS, ACPI_AC_DIR_NAME, 892 ACPI_SBS_NOTIFY_STATUS, 893 sbs->charger_present); 894 #endif 895 kobject_uevent(&sbs->charger.dev->kobj, KOBJ_CHANGE); 896 } 897 if (sbs->manager_present) { 898 for (id = 0; id < MAX_SBS_BAT; ++id) { 899 if (!(sbs->batteries_supported & (1 << id))) 900 continue; 901 bat = &sbs->battery[id]; 902 saved_battery_state = bat->present; 903 acpi_battery_read(bat); 904 if (saved_battery_state == bat->present) 905 continue; 906 #ifdef CONFIG_ACPI_PROC_EVENT 907 acpi_bus_generate_proc_event4(ACPI_BATTERY_CLASS, 908 bat->name, 909 ACPI_SBS_NOTIFY_STATUS, 910 bat->present); 911 #endif 912 kobject_uevent(&bat->bat.dev->kobj, KOBJ_CHANGE); 913 } 914 } 915 } 916 917 static int acpi_sbs_add(struct acpi_device *device) 918 { 919 struct acpi_sbs *sbs; 920 int result = 0; 921 int id; 922 923 sbs = kzalloc(sizeof(struct acpi_sbs), GFP_KERNEL); 924 if (!sbs) { 925 result = -ENOMEM; 926 goto end; 927 } 928 929 mutex_init(&sbs->lock); 930 931 sbs->hc = acpi_driver_data(device->parent); 932 sbs->device = device; 933 strcpy(acpi_device_name(device), ACPI_SBS_DEVICE_NAME); 934 strcpy(acpi_device_class(device), ACPI_SBS_CLASS); 935 device->driver_data = sbs; 936 937 result = acpi_charger_add(sbs); 938 if (result) 939 goto end; 940 941 result = acpi_manager_get_info(sbs); 942 if (!result) { 943 sbs->manager_present = 1; 944 for (id = 0; id < MAX_SBS_BAT; ++id) 945 if ((sbs->batteries_supported & (1 << id))) 946 acpi_battery_add(sbs, id); 947 } else 948 acpi_battery_add(sbs, 0); 949 acpi_smbus_register_callback(sbs->hc, acpi_sbs_callback, sbs); 950 end: 951 if (result) 952 acpi_sbs_remove(device, 0); 953 return result; 954 } 955 956 static int acpi_sbs_remove(struct acpi_device *device, int type) 957 { 958 struct acpi_sbs *sbs; 959 int id; 960 961 if (!device) 962 return -EINVAL; 963 sbs = acpi_driver_data(device); 964 if (!sbs) 965 return -EINVAL; 966 mutex_lock(&sbs->lock); 967 acpi_smbus_unregister_callback(sbs->hc); 968 for (id = 0; id < MAX_SBS_BAT; ++id) 969 acpi_battery_remove(sbs, id); 970 acpi_charger_remove(sbs); 971 mutex_unlock(&sbs->lock); 972 mutex_destroy(&sbs->lock); 973 kfree(sbs); 974 return 0; 975 } 976 977 static void acpi_sbs_rmdirs(void) 978 { 979 #ifdef CONFIG_ACPI_PROCFS_POWER 980 if (acpi_ac_dir) { 981 acpi_unlock_ac_dir(acpi_ac_dir); 982 acpi_ac_dir = NULL; 983 } 984 if (acpi_battery_dir) { 985 acpi_unlock_battery_dir(acpi_battery_dir); 986 acpi_battery_dir = NULL; 987 } 988 #endif 989 } 990 991 #ifdef CONFIG_PM_SLEEP 992 static int acpi_sbs_resume(struct device *dev) 993 { 994 struct acpi_sbs *sbs; 995 if (!dev) 996 return -EINVAL; 997 sbs = to_acpi_device(dev)->driver_data; 998 acpi_sbs_callback(sbs); 999 return 0; 1000 } 1001 #endif 1002 1003 static SIMPLE_DEV_PM_OPS(acpi_sbs_pm, NULL, acpi_sbs_resume); 1004 1005 static struct acpi_driver acpi_sbs_driver = { 1006 .name = "sbs", 1007 .class = ACPI_SBS_CLASS, 1008 .ids = sbs_device_ids, 1009 .ops = { 1010 .add = acpi_sbs_add, 1011 .remove = acpi_sbs_remove, 1012 }, 1013 .drv.pm = &acpi_sbs_pm, 1014 }; 1015 1016 static int __init acpi_sbs_init(void) 1017 { 1018 int result = 0; 1019 1020 if (acpi_disabled) 1021 return -ENODEV; 1022 #ifdef CONFIG_ACPI_PROCFS_POWER 1023 acpi_ac_dir = acpi_lock_ac_dir(); 1024 if (!acpi_ac_dir) 1025 return -ENODEV; 1026 acpi_battery_dir = acpi_lock_battery_dir(); 1027 if (!acpi_battery_dir) { 1028 acpi_sbs_rmdirs(); 1029 return -ENODEV; 1030 } 1031 #endif 1032 result = acpi_bus_register_driver(&acpi_sbs_driver); 1033 if (result < 0) { 1034 acpi_sbs_rmdirs(); 1035 return -ENODEV; 1036 } 1037 return 0; 1038 } 1039 1040 static void __exit acpi_sbs_exit(void) 1041 { 1042 acpi_bus_unregister_driver(&acpi_sbs_driver); 1043 acpi_sbs_rmdirs(); 1044 return; 1045 } 1046 1047 module_init(acpi_sbs_init); 1048 module_exit(acpi_sbs_exit); 1049