drivers/acpi/sbs.c

   1 /*
   2  *  acpi_sbs.c - ACPI Smart Battery System Driver ($Revision: 1.16 $)
   3  *
   4  *  Copyright (c) 2005 Rich Townsend <rhdt@bartol.udel.edu>
   5  *
   6  * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
   7  *
   8  *  This program is free software; you can redistribute it and/or modify
   9  *  it under the terms of the GNU General Public License as published by
  10  *  the Free Software Foundation; either version 2 of the License, or (at
  11  *  your option) any later version.
  12  *
  13  *  This program is distributed in the hope that it will be useful, but
  14  *  WITHOUT ANY WARRANTY; without even the implied warranty of
  15  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  16  *  General Public License for more details.
  17  *
  18  *  You should have received a copy of the GNU General Public License along
  19  *  with this program; if not, write to the Free Software Foundation, Inc.,
  20  *  59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
  21  *
  22  * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
  23  */
  24
  25 #include <linux/init.h>
  26 #include <linux/module.h>
  27 #include <linux/moduleparam.h>
  28 #include <linux/kernel.h>
  29 #include <linux/proc_fs.h>
  30 #include <linux/seq_file.h>
  31 #include <asm/uaccess.h>
  32 #include <linux/acpi.h>
  33 #include <linux/timer.h>
  34 #include <linux/jiffies.h>
  35 #include <linux/delay.h>
  36
  37 #define ACPI_SBS_COMPONENT              0x00080000
  38 #define ACPI_SBS_CLASS                  "sbs"
  39 #define ACPI_AC_CLASS                   "ac_adapter"
  40 #define ACPI_BATTERY_CLASS              "battery"
  41 #define ACPI_SBS_DEVICE_NAME            "Smart Battery System"
  42 #define ACPI_SBS_FILE_INFO              "info"
  43 #define ACPI_SBS_FILE_STATE             "state"
  44 #define ACPI_SBS_FILE_ALARM             "alarm"
  45 #define ACPI_BATTERY_DIR_NAME           "BAT%i"
  46 #define ACPI_AC_DIR_NAME                "AC0"
  47 #define ACPI_SBC_SMBUS_ADDR             0x9
  48 #define ACPI_SBSM_SMBUS_ADDR            0xa
  49 #define ACPI_SB_SMBUS_ADDR              0xb
  50 #define ACPI_SBS_AC_NOTIFY_STATUS       0x80
  51 #define ACPI_SBS_BATTERY_NOTIFY_STATUS  0x80
  52 #define ACPI_SBS_BATTERY_NOTIFY_INFO    0x81
  53
  54 #define _COMPONENT                      ACPI_SBS_COMPONENT
  55
  56 ACPI_MODULE_NAME("sbs");
  57
  58 MODULE_AUTHOR("Rich Townsend");
  59 MODULE_DESCRIPTION("Smart Battery System ACPI interface driver");
  60 MODULE_LICENSE("GPL");
  61
  62 #define xmsleep(t)      msleep(t)
  63
  64 #define ACPI_EC_SMB_PRTCL       0x00    /* protocol, PEC */
  65
  66 #define ACPI_EC_SMB_STS         0x01    /* status */
  67 #define ACPI_EC_SMB_ADDR        0x02    /* address */
  68 #define ACPI_EC_SMB_CMD         0x03    /* command */
  69 #define ACPI_EC_SMB_DATA        0x04    /* 32 data registers */
  70 #define ACPI_EC_SMB_BCNT        0x24    /* number of data bytes */
  71
  72 #define ACPI_EC_SMB_STS_DONE    0x80
  73 #define ACPI_EC_SMB_STS_STATUS  0x1f
  74
  75 #define ACPI_EC_SMB_PRTCL_WRITE         0x00
  76 #define ACPI_EC_SMB_PRTCL_READ          0x01
  77 #define ACPI_EC_SMB_PRTCL_WORD_DATA     0x08
  78 #define ACPI_EC_SMB_PRTCL_BLOCK_DATA    0x0a
  79
  80 #define ACPI_EC_SMB_TRANSACTION_SLEEP   1
  81 #define ACPI_EC_SMB_ACCESS_SLEEP1       1
  82 #define ACPI_EC_SMB_ACCESS_SLEEP2       10
  83
  84 #define DEF_CAPACITY_UNIT       3
  85 #define MAH_CAPACITY_UNIT       1
  86 #define MWH_CAPACITY_UNIT       2
  87 #define CAPACITY_UNIT           DEF_CAPACITY_UNIT
  88
  89 #define REQUEST_UPDATE_MODE     1
  90 #define QUEUE_UPDATE_MODE       2
  91
  92 #define DATA_TYPE_COMMON        0
  93 #define DATA_TYPE_INFO          1
  94 #define DATA_TYPE_STATE         2
  95 #define DATA_TYPE_ALARM         3
  96 #define DATA_TYPE_AC_STATE      4
  97
  98 extern struct proc_dir_entry *acpi_lock_ac_dir(void);
  99 extern struct proc_dir_entry *acpi_lock_battery_dir(void);
 100 extern void acpi_unlock_ac_dir(struct proc_dir_entry *acpi_ac_dir);
 101 extern void acpi_unlock_battery_dir(struct proc_dir_entry *acpi_battery_dir);
 102
 103 #define MAX_SBS_BAT                     4
 104 #define ACPI_SBS_BLOCK_MAX              32
 105
 106 #define ACPI_SBS_SMBUS_READ             1
 107 #define ACPI_SBS_SMBUS_WRITE            2
 108
 109 #define ACPI_SBS_WORD_DATA              1
 110 #define ACPI_SBS_BLOCK_DATA             2
 111
 112 #define UPDATE_DELAY    10
 113
 114 /* 0 - every time, > 0 - by update_time */
 115 static unsigned int update_time = 120;
 116
 117 static unsigned int capacity_mode = CAPACITY_UNIT;
 118
 119 module_param(update_time, uint, 0644);
 120 module_param(capacity_mode, uint, 0444);
 121
 122 static int acpi_sbs_add(struct acpi_device *device);
 123 static int acpi_sbs_remove(struct acpi_device *device, int type);
 124 static int acpi_sbs_resume(struct acpi_device *device);
 125
 126 static const struct acpi_device_id sbs_device_ids[] = {
 127         {"ACPI0001", 0},
 128         {"ACPI0005", 0},
 129         {"", 0},
 130 };
 131 MODULE_DEVICE_TABLE(acpi, sbs_device_ids);
 132
 133 static struct acpi_driver acpi_sbs_driver = {
 134         .name = "sbs",
 135         .class = ACPI_SBS_CLASS,
 136         .ids = sbs_device_ids,
 137         .ops = {
 138                 .add = acpi_sbs_add,
 139                 .remove = acpi_sbs_remove,
 140                 .resume = acpi_sbs_resume,
 141                 },
 142 };
 143
 144 struct acpi_ac {
 145         int ac_present;
 146 };
 147
 148 struct acpi_battery_info {
 149         int capacity_mode;
 150         s16 full_charge_capacity;
 151         s16 design_capacity;
 152         s16 design_voltage;
 153         int vscale;
 154         int ipscale;
 155         s16 serial_number;
 156         char manufacturer_name[ACPI_SBS_BLOCK_MAX + 3];
 157         char device_name[ACPI_SBS_BLOCK_MAX + 3];
 158         char device_chemistry[ACPI_SBS_BLOCK_MAX + 3];
 159 };
 160
 161 struct acpi_battery_state {
 162         s16 voltage;
 163         s16 amperage;
 164         s16 remaining_capacity;
 165         s16 battery_state;
 166 };
 167
 168 struct acpi_battery_alarm {
 169         s16 remaining_capacity;
 170 };
 171
 172 struct acpi_battery {
 173         int alive;
 174         int id;
 175         int init_state;
 176         int battery_present;
 177         struct acpi_sbs *sbs;
 178         struct acpi_battery_info info;
 179         struct acpi_battery_state state;
 180         struct acpi_battery_alarm alarm;
 181         struct proc_dir_entry *battery_entry;
 182 };
 183
 184 struct acpi_sbs {
 185         int base;
 186         struct acpi_device *device;
 187         struct mutex mutex;
 188         int sbsm_present;
 189         int sbsm_batteries_supported;
 190         struct proc_dir_entry *ac_entry;
 191         struct acpi_ac ac;
 192         struct acpi_battery battery[MAX_SBS_BAT];
 193         int zombie;
 194         struct timer_list update_timer;
 195         int run_cnt;
 196         int update_proc_flg;
 197 };
 198
 199 static int acpi_sbs_update_run(struct acpi_sbs *sbs, int id, int data_type);
 200 static void acpi_sbs_update_time(void *data);
 201
 202 union sbs_rw_data {
 203         u16 word;
 204         u8 block[ACPI_SBS_BLOCK_MAX + 2];
 205 };
 206
 207 static int acpi_ec_sbs_access(struct acpi_sbs *sbs, u16 addr,
 208                               char read_write, u8 command, int size,
 209                               union sbs_rw_data *data);
 210
 211 /* --------------------------------------------------------------------------
 212                                SMBus Communication
 213    -------------------------------------------------------------------------- */
 214
 215 static int acpi_ec_sbs_read(struct acpi_sbs *sbs, u8 address, u8 * data)
 216 {
 217         u8 val;
 218         int err;
 219
 220         err = ec_read(sbs->base + address, &val);
 221         if (!err) {
 222                 *data = val;
 223         }
 224         xmsleep(ACPI_EC_SMB_TRANSACTION_SLEEP);
 225         return (err);
 226 }
 227
 228 static int acpi_ec_sbs_write(struct acpi_sbs *sbs, u8 address, u8 data)
 229 {
 230         int err;
 231
 232         err = ec_write(sbs->base + address, data);
 233         return (err);
 234 }
 235
 236 static int
 237 acpi_ec_sbs_access(struct acpi_sbs *sbs, u16 addr,
 238                    char read_write, u8 command, int size,
 239                    union sbs_rw_data *data)
 240 {
 241         unsigned char protocol, len = 0, temp[2] = { 0, 0 };
 242         int i;
 243
 244         if (read_write == ACPI_SBS_SMBUS_READ) {
 245                 protocol = ACPI_EC_SMB_PRTCL_READ;
 246         } else {
 247                 protocol = ACPI_EC_SMB_PRTCL_WRITE;
 248         }
 249
 250         switch (size) {
 251
 252         case ACPI_SBS_WORD_DATA:
 253                 acpi_ec_sbs_write(sbs, ACPI_EC_SMB_CMD, command);
 254                 if (read_write == ACPI_SBS_SMBUS_WRITE) {
 255                         acpi_ec_sbs_write(sbs, ACPI_EC_SMB_DATA, data->word);
 256                         acpi_ec_sbs_write(sbs, ACPI_EC_SMB_DATA + 1,
 257                                           data->word >> 8);
 258                 }
 259                 protocol |= ACPI_EC_SMB_PRTCL_WORD_DATA;
 260                 break;
 261         case ACPI_SBS_BLOCK_DATA:
 262                 acpi_ec_sbs_write(sbs, ACPI_EC_SMB_CMD, command);
 263                 if (read_write == ACPI_SBS_SMBUS_WRITE) {
 264                         len = min_t(u8, data->block[0], 32);
 265                         acpi_ec_sbs_write(sbs, ACPI_EC_SMB_BCNT, len);
 266                         for (i = 0; i < len; i++)
 267                                 acpi_ec_sbs_write(sbs, ACPI_EC_SMB_DATA + i,
 268                                                   data->block[i + 1]);
 269                 }
 270                 protocol |= ACPI_EC_SMB_PRTCL_BLOCK_DATA;
 271                 break;
 272         default:
 273                 ACPI_EXCEPTION((AE_INFO, AE_ERROR,
 274                                 "unsupported transaction %d", size));
 275                 return (-1);
 276         }
 277
 278         acpi_ec_sbs_write(sbs, ACPI_EC_SMB_ADDR, addr << 1);
 279         acpi_ec_sbs_write(sbs, ACPI_EC_SMB_PRTCL, protocol);
 280
 281         acpi_ec_sbs_read(sbs, ACPI_EC_SMB_STS, temp);
 282
 283         if (~temp[0] & ACPI_EC_SMB_STS_DONE) {
 284                 xmsleep(ACPI_EC_SMB_ACCESS_SLEEP1);
 285                 acpi_ec_sbs_read(sbs, ACPI_EC_SMB_STS, temp);
 286         }
 287         if (~temp[0] & ACPI_EC_SMB_STS_DONE) {
 288                 xmsleep(ACPI_EC_SMB_ACCESS_SLEEP2);
 289                 acpi_ec_sbs_read(sbs, ACPI_EC_SMB_STS, temp);
 290         }
 291         if ((~temp[0] & ACPI_EC_SMB_STS_DONE)
 292             || (temp[0] & ACPI_EC_SMB_STS_STATUS)) {
 293                 ACPI_EXCEPTION((AE_INFO, AE_ERROR,
 294                                 "transaction %d error", size));
 295                 return (-1);
 296         }
 297
 298         if (read_write == ACPI_SBS_SMBUS_WRITE) {
 299                 return (0);
 300         }
 301
 302         switch (size) {
 303
 304         case ACPI_SBS_WORD_DATA:
 305                 acpi_ec_sbs_read(sbs, ACPI_EC_SMB_DATA, temp);
 306                 acpi_ec_sbs_read(sbs, ACPI_EC_SMB_DATA + 1, temp + 1);
 307                 data->word = (temp[1] << 8) | temp[0];
 308                 break;
 309
 310         case ACPI_SBS_BLOCK_DATA:
 311                 len = 0;
 312                 acpi_ec_sbs_read(sbs, ACPI_EC_SMB_BCNT, &len);
 313                 len = min_t(u8, len, 32);
 314                 for (i = 0; i < len; i++)
 315                         acpi_ec_sbs_read(sbs, ACPI_EC_SMB_DATA + i,
 316                                          data->block + i + 1);
 317                 data->block[0] = len;
 318                 break;
 319         default:
 320                 ACPI_EXCEPTION((AE_INFO, AE_ERROR,
 321                                 "unsupported transaction %d", size));
 322                 return (-1);
 323         }
 324
 325         return (0);
 326 }
 327
 328 static int
 329 acpi_sbs_read_word(struct acpi_sbs *sbs, int addr, int func, u16 * word)
 330 {
 331         union sbs_rw_data data;
 332         int result = 0;
 333
 334         result = acpi_ec_sbs_access(sbs, addr,
 335                                     ACPI_SBS_SMBUS_READ, func,
 336                                     ACPI_SBS_WORD_DATA, &data);
 337         if (result) {
 338                 ACPI_EXCEPTION((AE_INFO, AE_ERROR,
 339                                 "acpi_ec_sbs_access() failed"));
 340         } else {
 341                 *word = data.word;
 342         }
 343
 344         return result;
 345 }
 346
 347 static int
 348 acpi_sbs_read_str(struct acpi_sbs *sbs, int addr, int func, char *str)
 349 {
 350         union sbs_rw_data data;
 351         int result = 0;
 352
 353         result = acpi_ec_sbs_access(sbs, addr,
 354                                     ACPI_SBS_SMBUS_READ, func,
 355                                     ACPI_SBS_BLOCK_DATA, &data);
 356         if (result) {
 357                 ACPI_EXCEPTION((AE_INFO, AE_ERROR,
 358                                 "acpi_ec_sbs_access() failed"));
 359         } else {
 360                 strncpy(str, (const char *)data.block + 1, data.block[0]);
 361                 str[data.block[0]] = 0;
 362         }
 363
 364         return result;
 365 }
 366
 367 static int
 368 acpi_sbs_write_word(struct acpi_sbs *sbs, int addr, int func, int word)
 369 {
 370         union sbs_rw_data data;
 371         int result = 0;
 372
 373         data.word = word;
 374
 375         result = acpi_ec_sbs_access(sbs, addr,
 376                                     ACPI_SBS_SMBUS_WRITE, func,
 377                                     ACPI_SBS_WORD_DATA, &data);
 378         if (result) {
 379                 ACPI_EXCEPTION((AE_INFO, AE_ERROR,
 380                                 "acpi_ec_sbs_access() failed"));
 381         }
 382
 383         return result;
 384 }
 385
 386 static int sbs_zombie(struct acpi_sbs *sbs)
 387 {
 388         return (sbs->zombie);
 389 }
 390
 391 static int sbs_mutex_lock(struct acpi_sbs *sbs)
 392 {
 393         if (sbs_zombie(sbs)) {
 394                 return -ENODEV;
 395         }
 396         mutex_lock(&sbs->mutex);
 397         return 0;
 398 }
 399
 400 static void sbs_mutex_unlock(struct acpi_sbs *sbs)
 401 {
 402         mutex_unlock(&sbs->mutex);
 403 }
 404
 405 /* --------------------------------------------------------------------------
 406                             Smart Battery System Management
 407    -------------------------------------------------------------------------- */
 408
 409 static int acpi_check_update_proc(struct acpi_sbs *sbs)
 410 {
 411         acpi_status status = AE_OK;
 412
 413         if (update_time == 0) {
 414                 sbs->update_proc_flg = 0;
 415                 return 0;
 416         }
 417         if (sbs->update_proc_flg == 0) {
 418                 status = acpi_os_execute(OSL_GPE_HANDLER,
 419                                          acpi_sbs_update_time, sbs);
 420                 if (status != AE_OK) {
 421                         ACPI_EXCEPTION((AE_INFO, status,
 422                                         "acpi_os_execute() failed"));
 423                         return 1;
 424                 }
 425                 sbs->update_proc_flg = 1;
 426         }
 427         return 0;
 428 }
 429
 430 static int acpi_sbs_generate_event(struct acpi_device *device,
 431                                    int event, int state, char *bid, char *class)
 432 {
 433         char bid_saved[5];
 434         char class_saved[20];
 435         int result = 0;
 436
 437         strcpy(bid_saved, acpi_device_bid(device));
 438         strcpy(class_saved, acpi_device_class(device));
 439
 440         strcpy(acpi_device_bid(device), bid);
 441         strcpy(acpi_device_class(device), class);
 442
 443         result = acpi_bus_generate_event(device, event, state);
 444
 445         strcpy(acpi_device_bid(device), bid_saved);
 446         strcpy(acpi_device_class(device), class_saved);
 447
 448         return result;
 449 }
 450
 451 static int acpi_battery_get_present(struct acpi_battery *battery)
 452 {
 453         s16 state;
 454         int result = 0;
 455         int is_present = 0;
 456
 457         result = acpi_sbs_read_word(battery->sbs,
 458                                     ACPI_SBSM_SMBUS_ADDR, 0x01, &state);
 459         if (result) {
 460                 ACPI_EXCEPTION((AE_INFO, AE_ERROR,
 461                                 "acpi_sbs_read_word() failed"));
 462         }
 463         if (!result) {
 464                 is_present = (state & 0x000f) & (1 << battery->id);
 465         }
 466         battery->battery_present = is_present;
 467
 468         return result;
 469 }
 470
 471 static int acpi_battery_select(struct acpi_battery *battery)
 472 {
 473         struct acpi_sbs *sbs = battery->sbs;
 474         int result = 0;
 475         s16 state;
 476         int foo;
 477
 478         if (sbs->sbsm_present) {
 479
 480                 /* Take special care not to knobble other nibbles of
 481                  * state (aka selector_state), since
 482                  * it causes charging to halt on SBSELs */
 483
 484                 result =
 485                     acpi_sbs_read_word(sbs, ACPI_SBSM_SMBUS_ADDR, 0x01, &state);
 486                 if (result) {
 487                         ACPI_EXCEPTION((AE_INFO, AE_ERROR,
 488                                         "acpi_sbs_read_word() failed"));
 489                         goto end;
 490                 }
 491
 492                 foo = (state & 0x0fff) | (1 << (battery->id + 12));
 493                 result =
 494                     acpi_sbs_write_word(sbs, ACPI_SBSM_SMBUS_ADDR, 0x01, foo);
 495                 if (result) {
 496                         ACPI_EXCEPTION((AE_INFO, AE_ERROR,
 497                                         "acpi_sbs_write_word() failed"));
 498                         goto end;
 499                 }
 500         }
 501
 502       end:
 503         return result;
 504 }
 505
 506 static int acpi_sbsm_get_info(struct acpi_sbs *sbs)
 507 {
 508         int result = 0;
 509         s16 battery_system_info;
 510
 511         result = acpi_sbs_read_word(sbs, ACPI_SBSM_SMBUS_ADDR, 0x04,
 512                                     &battery_system_info);
 513         if (result) {
 514                 ACPI_EXCEPTION((AE_INFO, AE_ERROR,
 515                                 "acpi_sbs_read_word() failed"));
 516                 goto end;
 517         }
 518         sbs->sbsm_present = 1;
 519         sbs->sbsm_batteries_supported = battery_system_info & 0x000f;
 520
 521       end:
 522
 523         return result;
 524 }
 525
 526 static int acpi_battery_get_info(struct acpi_battery *battery)
 527 {
 528         struct acpi_sbs *sbs = battery->sbs;
 529         int result = 0;
 530         s16 battery_mode;
 531         s16 specification_info;
 532
 533         result = acpi_sbs_read_word(sbs, ACPI_SB_SMBUS_ADDR, 0x03,
 534                                     &battery_mode);
 535         if (result) {
 536                 ACPI_EXCEPTION((AE_INFO, AE_ERROR,
 537                                 "acpi_sbs_read_word() failed"));
 538                 goto end;
 539         }
 540         battery->info.capacity_mode = (battery_mode & 0x8000) >> 15;
 541
 542         result = acpi_sbs_read_word(sbs, ACPI_SB_SMBUS_ADDR, 0x10,
 543                                     &battery->info.full_charge_capacity);
 544         if (result) {
 545                 ACPI_EXCEPTION((AE_INFO, AE_ERROR,
 546                                 "acpi_sbs_read_word() failed"));
 547                 goto end;
 548         }
 549
 550         result = acpi_sbs_read_word(sbs, ACPI_SB_SMBUS_ADDR, 0x18,
 551                                     &battery->info.design_capacity);
 552
 553         if (result) {
 554                 ACPI_EXCEPTION((AE_INFO, AE_ERROR,
 555                                 "acpi_sbs_read_word() failed"));
 556                 goto end;
 557         }
 558
 559         result = acpi_sbs_read_word(sbs, ACPI_SB_SMBUS_ADDR, 0x19,
 560                                     &battery->info.design_voltage);
 561         if (result) {
 562                 ACPI_EXCEPTION((AE_INFO, AE_ERROR,
 563                                 "acpi_sbs_read_word() failed"));
 564                 goto end;
 565         }
 566
 567         result = acpi_sbs_read_word(sbs, ACPI_SB_SMBUS_ADDR, 0x1a,
 568                                     &specification_info);
 569         if (result) {
 570                 ACPI_EXCEPTION((AE_INFO, AE_ERROR,
 571                                 "acpi_sbs_read_word() failed"));
 572                 goto end;
 573         }
 574
 575         switch ((specification_info & 0x0f00) >> 8) {
 576         case 1:
 577                 battery->info.vscale = 10;
 578                 break;
 579         case 2:
 580                 battery->info.vscale = 100;
 581                 break;
 582         case 3:
 583                 battery->info.vscale = 1000;
 584                 break;
 585         default:
 586                 battery->info.vscale = 1;
 587         }
 588
 589         switch ((specification_info & 0xf000) >> 12) {
 590         case 1:
 591                 battery->info.ipscale = 10;
 592                 break;
 593         case 2:
 594                 battery->info.ipscale = 100;
 595                 break;
 596         case 3:
 597                 battery->info.ipscale = 1000;
 598                 break;
 599         default:
 600                 battery->info.ipscale = 1;
 601         }
 602
 603         result = acpi_sbs_read_word(sbs, ACPI_SB_SMBUS_ADDR, 0x1c,
 604                                     &battery->info.serial_number);
 605         if (result) {
 606                 ACPI_EXCEPTION((AE_INFO, AE_ERROR,
 607                                 "acpi_sbs_read_word() failed"));
 608                 goto end;
 609         }
 610
 611         result = acpi_sbs_read_str(sbs, ACPI_SB_SMBUS_ADDR, 0x20,
 612                                    battery->info.manufacturer_name);
 613         if (result) {
 614                 ACPI_EXCEPTION((AE_INFO, AE_ERROR,
 615                                 "acpi_sbs_read_str() failed"));
 616                 goto end;
 617         }
 618
 619         result = acpi_sbs_read_str(sbs, ACPI_SB_SMBUS_ADDR, 0x21,
 620                                    battery->info.device_name);
 621         if (result) {
 622                 ACPI_EXCEPTION((AE_INFO, AE_ERROR,
 623                                 "acpi_sbs_read_str() failed"));
 624                 goto end;
 625         }
 626
 627         result = acpi_sbs_read_str(sbs, ACPI_SB_SMBUS_ADDR, 0x22,
 628                                    battery->info.device_chemistry);
 629         if (result) {
 630                 ACPI_EXCEPTION((AE_INFO, AE_ERROR,
 631                                 "acpi_sbs_read_str() failed"));
 632                 goto end;
 633         }
 634
 635       end:
 636         return result;
 637 }
 638
 639 static int acpi_battery_get_state(struct acpi_battery *battery)
 640 {
 641         struct acpi_sbs *sbs = battery->sbs;
 642         int result = 0;
 643
 644         result = acpi_sbs_read_word(sbs, ACPI_SB_SMBUS_ADDR, 0x09,
 645                                     &battery->state.voltage);
 646         if (result) {
 647                 ACPI_EXCEPTION((AE_INFO, AE_ERROR,
 648                                 "acpi_sbs_read_word() failed"));
 649                 goto end;
 650         }
 651
 652         result = acpi_sbs_read_word(sbs, ACPI_SB_SMBUS_ADDR, 0x0a,
 653                                     &battery->state.amperage);
 654         if (result) {
 655                 ACPI_EXCEPTION((AE_INFO, AE_ERROR,
 656                                 "acpi_sbs_read_word() failed"));
 657                 goto end;
 658         }
 659
 660         result = acpi_sbs_read_word(sbs, ACPI_SB_SMBUS_ADDR, 0x0f,
 661                                     &battery->state.remaining_capacity);
 662         if (result) {
 663                 ACPI_EXCEPTION((AE_INFO, AE_ERROR,
 664                                 "acpi_sbs_read_word() failed"));
 665                 goto end;
 666         }
 667
 668         result = acpi_sbs_read_word(sbs, ACPI_SB_SMBUS_ADDR, 0x16,
 669                                     &battery->state.battery_state);
 670         if (result) {
 671                 ACPI_EXCEPTION((AE_INFO, AE_ERROR,
 672                                 "acpi_sbs_read_word() failed"));
 673                 goto end;
 674         }
 675
 676       end:
 677         return result;
 678 }
 679
 680 static int acpi_battery_get_alarm(struct acpi_battery *battery)
 681 {
 682         struct acpi_sbs *sbs = battery->sbs;
 683         int result = 0;
 684
 685         result = acpi_sbs_read_word(sbs, ACPI_SB_SMBUS_ADDR, 0x01,
 686                                     &battery->alarm.remaining_capacity);
 687         if (result) {
 688                 ACPI_EXCEPTION((AE_INFO, AE_ERROR,
 689                                 "acpi_sbs_read_word() failed"));
 690                 goto end;
 691         }
 692
 693       end:
 694
 695         return result;
 696 }
 697
 698 static int acpi_battery_set_alarm(struct acpi_battery *battery,
 699                                   unsigned long alarm)
 700 {
 701         struct acpi_sbs *sbs = battery->sbs;
 702         int result = 0;
 703         s16 battery_mode;
 704         int foo;
 705
 706         result = acpi_battery_select(battery);
 707         if (result) {
 708                 ACPI_EXCEPTION((AE_INFO, AE_ERROR,
 709                                 "acpi_battery_select() failed"));
 710                 goto end;
 711         }
 712
 713         /* If necessary, enable the alarm */
 714
 715         if (alarm > 0) {
 716                 result =
 717                     acpi_sbs_read_word(sbs, ACPI_SB_SMBUS_ADDR, 0x03,
 718                                        &battery_mode);
 719                 if (result) {
 720                         ACPI_EXCEPTION((AE_INFO, AE_ERROR,
 721                                         "acpi_sbs_read_word() failed"));
 722                         goto end;
 723                 }
 724
 725                 result =
 726                     acpi_sbs_write_word(sbs, ACPI_SB_SMBUS_ADDR, 0x01,
 727                                         battery_mode & 0xbfff);
 728                 if (result) {
 729                         ACPI_EXCEPTION((AE_INFO, AE_ERROR,
 730                                         "acpi_sbs_write_word() failed"));
 731                         goto end;
 732                 }
 733         }
 734
 735         foo = alarm / (battery->info.capacity_mode ? 10 : 1);
 736         result = acpi_sbs_write_word(sbs, ACPI_SB_SMBUS_ADDR, 0x01, foo);
 737         if (result) {
 738                 ACPI_EXCEPTION((AE_INFO, AE_ERROR,
 739                                 "acpi_sbs_write_word() failed"));
 740                 goto end;
 741         }
 742
 743       end:
 744
 745         return result;
 746 }
 747
 748 static int acpi_battery_set_mode(struct acpi_battery *battery)
 749 {
 750         struct acpi_sbs *sbs = battery->sbs;
 751         int result = 0;
 752         s16 battery_mode;
 753
 754         if (capacity_mode == DEF_CAPACITY_UNIT) {
 755                 goto end;
 756         }
 757
 758         result = acpi_sbs_read_word(sbs,
 759                                     ACPI_SB_SMBUS_ADDR, 0x03, &battery_mode);
 760         if (result) {
 761                 ACPI_EXCEPTION((AE_INFO, AE_ERROR,
 762                                 "acpi_sbs_read_word() failed"));
 763                 goto end;
 764         }
 765
 766         if (capacity_mode == MAH_CAPACITY_UNIT) {
 767                 battery_mode &= 0x7fff;
 768         } else {
 769                 battery_mode |= 0x8000;
 770         }
 771         result = acpi_sbs_write_word(sbs,
 772                                      ACPI_SB_SMBUS_ADDR, 0x03, battery_mode);
 773         if (result) {
 774                 ACPI_EXCEPTION((AE_INFO, AE_ERROR,
 775                                 "acpi_sbs_write_word() failed"));
 776                 goto end;
 777         }
 778
 779         result = acpi_sbs_read_word(sbs,
 780                                     ACPI_SB_SMBUS_ADDR, 0x03, &battery_mode);
 781         if (result) {
 782                 ACPI_EXCEPTION((AE_INFO, AE_ERROR,
 783                                 "acpi_sbs_read_word() failed"));
 784                 goto end;
 785         }
 786
 787       end:
 788         return result;
 789 }
 790
 791 static int acpi_battery_init(struct acpi_battery *battery)
 792 {
 793         int result = 0;
 794
 795         result = acpi_battery_select(battery);
 796         if (result) {
 797                 ACPI_EXCEPTION((AE_INFO, AE_ERROR,
 798                                 "acpi_battery_select() failed"));
 799                 goto end;
 800         }
 801
 802         result = acpi_battery_set_mode(battery);
 803         if (result) {
 804                 ACPI_EXCEPTION((AE_INFO, AE_ERROR,
 805                                 "acpi_battery_set_mode() failed"));
 806                 goto end;
 807         }
 808
 809         result = acpi_battery_get_info(battery);
 810         if (result) {
 811                 ACPI_EXCEPTION((AE_INFO, AE_ERROR,
 812                                 "acpi_battery_get_info() failed"));
 813                 goto end;
 814         }
 815
 816         result = acpi_battery_get_state(battery);
 817         if (result) {
 818                 ACPI_EXCEPTION((AE_INFO, AE_ERROR,
 819                                 "acpi_battery_get_state() failed"));
 820                 goto end;
 821         }
 822
 823         result = acpi_battery_get_alarm(battery);
 824         if (result) {
 825                 ACPI_EXCEPTION((AE_INFO, AE_ERROR,
 826                                 "acpi_battery_get_alarm() failed"));
 827                 goto end;
 828         }
 829
 830       end:
 831         return result;
 832 }
 833
 834 static int acpi_ac_get_present(struct acpi_sbs *sbs)
 835 {
 836         int result = 0;
 837         s16 charger_status;
 838
 839         result = acpi_sbs_read_word(sbs, ACPI_SBC_SMBUS_ADDR, 0x13,
 840                                     &charger_status);
 841
 842         if (result) {
 843                 ACPI_EXCEPTION((AE_INFO, AE_ERROR,
 844                                 "acpi_sbs_read_word() failed"));
 845                 goto end;
 846         }
 847
 848         sbs->ac.ac_present = (charger_status & 0x8000) >> 15;
 849
 850       end:
 851
 852         return result;
 853 }
 854
 855 /* --------------------------------------------------------------------------
 856                               FS Interface (/proc/acpi)
 857    -------------------------------------------------------------------------- */
 858
 859 /* Generic Routines */
 860
 861 static int
 862 acpi_sbs_generic_add_fs(struct proc_dir_entry **dir,
 863                         struct proc_dir_entry *parent_dir,
 864                         char *dir_name,
 865                         struct file_operations *info_fops,
 866                         struct file_operations *state_fops,
 867                         struct file_operations *alarm_fops, void *data)
 868 {
 869         struct proc_dir_entry *entry = NULL;
 870
 871         if (!*dir) {
 872                 *dir = proc_mkdir(dir_name, parent_dir);
 873                 if (!*dir) {
 874                         ACPI_EXCEPTION((AE_INFO, AE_ERROR,
 875                                         "proc_mkdir() failed"));
 876                         return -ENODEV;
 877                 }
 878                 (*dir)->owner = THIS_MODULE;
 879         }
 880
 881         /* 'info' [R] */
 882         if (info_fops) {
 883                 entry = create_proc_entry(ACPI_SBS_FILE_INFO, S_IRUGO, *dir);
 884                 if (!entry) {
 885                         ACPI_EXCEPTION((AE_INFO, AE_ERROR,
 886                                         "create_proc_entry() failed"));
 887                 } else {
 888                         entry->proc_fops = info_fops;
 889                         entry->data = data;
 890                         entry->owner = THIS_MODULE;
 891                 }
 892         }
 893
 894         /* 'state' [R] */
 895         if (state_fops) {
 896                 entry = create_proc_entry(ACPI_SBS_FILE_STATE, S_IRUGO, *dir);
 897                 if (!entry) {
 898                         ACPI_EXCEPTION((AE_INFO, AE_ERROR,
 899                                         "create_proc_entry() failed"));
 900                 } else {
 901                         entry->proc_fops = state_fops;
 902                         entry->data = data;
 903                         entry->owner = THIS_MODULE;
 904                 }
 905         }
 906
 907         /* 'alarm' [R/W] */
 908         if (alarm_fops) {
 909                 entry = create_proc_entry(ACPI_SBS_FILE_ALARM, S_IRUGO, *dir);
 910                 if (!entry) {
 911                         ACPI_EXCEPTION((AE_INFO, AE_ERROR,
 912                                         "create_proc_entry() failed"));
 913                 } else {
 914                         entry->proc_fops = alarm_fops;
 915                         entry->data = data;
 916                         entry->owner = THIS_MODULE;
 917                 }
 918         }
 919
 920         return 0;
 921 }
 922
 923 static void
 924 acpi_sbs_generic_remove_fs(struct proc_dir_entry **dir,
 925                            struct proc_dir_entry *parent_dir)
 926 {
 927
 928         if (*dir) {
 929                 remove_proc_entry(ACPI_SBS_FILE_INFO, *dir);
 930                 remove_proc_entry(ACPI_SBS_FILE_STATE, *dir);
 931                 remove_proc_entry(ACPI_SBS_FILE_ALARM, *dir);
 932                 remove_proc_entry((*dir)->name, parent_dir);
 933                 *dir = NULL;
 934         }
 935
 936 }
 937
 938 /* Smart Battery Interface */
 939
 940 static struct proc_dir_entry *acpi_battery_dir = NULL;
 941
 942 static int acpi_battery_read_info(struct seq_file *seq, void *offset)
 943 {
 944         struct acpi_battery *battery = seq->private;
 945         struct acpi_sbs *sbs = battery->sbs;
 946         int cscale;
 947         int result = 0;
 948
 949         if (sbs_mutex_lock(sbs)) {
 950                 return -ENODEV;
 951         }
 952
 953         result = acpi_check_update_proc(sbs);
 954         if (result)
 955                 goto end;
 956
 957         if (update_time == 0) {
 958                 result = acpi_sbs_update_run(sbs, battery->id, DATA_TYPE_INFO);
 959                 if (result) {
 960                         ACPI_EXCEPTION((AE_INFO, AE_ERROR,
 961                                         "acpi_sbs_update_run() failed"));
 962                 }
 963         }
 964
 965         if (battery->battery_present) {
 966                 seq_printf(seq, "present:                 yes\n");
 967         } else {
 968                 seq_printf(seq, "present:                 no\n");
 969                 goto end;
 970         }
 971
 972         if (battery->info.capacity_mode) {
 973                 cscale = battery->info.vscale * battery->info.ipscale;
 974         } else {
 975                 cscale = battery->info.ipscale;
 976         }
 977         seq_printf(seq, "design capacity:         %i%s\n",
 978                    battery->info.design_capacity * cscale,
 979                    battery->info.capacity_mode ? "0 mWh" : " mAh");
 980
 981         seq_printf(seq, "last full capacity:      %i%s\n",
 982                    battery->info.full_charge_capacity * cscale,
 983                    battery->info.capacity_mode ? "0 mWh" : " mAh");
 984
 985         seq_printf(seq, "battery technology:      rechargeable\n");
 986
 987         seq_printf(seq, "design voltage:          %i mV\n",
 988                    battery->info.design_voltage * battery->info.vscale);
 989
 990         seq_printf(seq, "design capacity warning: unknown\n");
 991         seq_printf(seq, "design capacity low:     unknown\n");
 992         seq_printf(seq, "capacity granularity 1:  unknown\n");
 993         seq_printf(seq, "capacity granularity 2:  unknown\n");
 994
 995         seq_printf(seq, "model number:            %s\n",
 996                    battery->info.device_name);
 997
 998         seq_printf(seq, "serial number:           %i\n",
 999                    battery->info.serial_number);
1000
1001         seq_printf(seq, "battery type:            %s\n",
1002                    battery->info.device_chemistry);
1003
1004         seq_printf(seq, "OEM info:                %s\n",
1005                    battery->info.manufacturer_name);
1006
1007       end:
1008
1009         sbs_mutex_unlock(sbs);
1010
1011         return result;
1012 }
1013
1014 static int acpi_battery_info_open_fs(struct inode *inode, struct file *file)
1015 {
1016         return single_open(file, acpi_battery_read_info, PDE(inode)->data);
1017 }
1018
1019 static int acpi_battery_read_state(struct seq_file *seq, void *offset)
1020 {
1021         struct acpi_battery *battery = seq->private;
1022         struct acpi_sbs *sbs = battery->sbs;
1023         int result = 0;
1024         int cscale;
1025         int foo;
1026
1027         if (sbs_mutex_lock(sbs)) {
1028                 return -ENODEV;
1029         }
1030
1031         result = acpi_check_update_proc(sbs);
1032         if (result)
1033                 goto end;
1034
1035         if (update_time == 0) {
1036                 result = acpi_sbs_update_run(sbs, battery->id, DATA_TYPE_STATE);
1037                 if (result) {
1038                         ACPI_EXCEPTION((AE_INFO, AE_ERROR,
1039                                         "acpi_sbs_update_run() failed"));
1040                 }
1041         }
1042
1043         if (battery->battery_present) {
1044                 seq_printf(seq, "present:                 yes\n");
1045         } else {
1046                 seq_printf(seq, "present:                 no\n");
1047                 goto end;
1048         }
1049
1050         if (battery->info.capacity_mode) {
1051                 cscale = battery->info.vscale * battery->info.ipscale;
1052         } else {
1053                 cscale = battery->info.ipscale;
1054         }
1055
1056         if (battery->state.battery_state & 0x0010) {
1057                 seq_printf(seq, "capacity state:          critical\n");
1058         } else {
1059                 seq_printf(seq, "capacity state:          ok\n");
1060         }
1061
1062         foo = (s16) battery->state.amperage * battery->info.ipscale;
1063         if (battery->info.capacity_mode) {
1064                 foo = foo * battery->info.design_voltage / 1000;
1065         }
1066         if (battery->state.amperage < 0) {
1067                 seq_printf(seq, "charging state:          discharging\n");
1068                 seq_printf(seq, "present rate:            %d %s\n",
1069                            -foo, battery->info.capacity_mode ? "mW" : "mA");
1070         } else if (battery->state.amperage > 0) {
1071                 seq_printf(seq, "charging state:          charging\n");
1072                 seq_printf(seq, "present rate:            %d %s\n",
1073                            foo, battery->info.capacity_mode ? "mW" : "mA");
1074         } else {
1075                 seq_printf(seq, "charging state:          charged\n");
1076                 seq_printf(seq, "present rate:            0 %s\n",
1077                            battery->info.capacity_mode ? "mW" : "mA");
1078         }
1079
1080         seq_printf(seq, "remaining capacity:      %i%s\n",
1081                    battery->state.remaining_capacity * cscale,
1082                    battery->info.capacity_mode ? "0 mWh" : " mAh");
1083
1084         seq_printf(seq, "present voltage:         %i mV\n",
1085                    battery->state.voltage * battery->info.vscale);
1086
1087       end:
1088
1089         sbs_mutex_unlock(sbs);
1090
1091         return result;
1092 }
1093
1094 static int acpi_battery_state_open_fs(struct inode *inode, struct file *file)
1095 {
1096         return single_open(file, acpi_battery_read_state, PDE(inode)->data);
1097 }
1098
1099 static int acpi_battery_read_alarm(struct seq_file *seq, void *offset)
1100 {
1101         struct acpi_battery *battery = seq->private;
1102         struct acpi_sbs *sbs = battery->sbs;
1103         int result = 0;
1104         int cscale;
1105
1106         if (sbs_mutex_lock(sbs)) {
1107                 return -ENODEV;
1108         }
1109
1110         result = acpi_check_update_proc(sbs);
1111         if (result)
1112                 goto end;
1113
1114         if (update_time == 0) {
1115                 result = acpi_sbs_update_run(sbs, battery->id, DATA_TYPE_ALARM);
1116                 if (result) {
1117                         ACPI_EXCEPTION((AE_INFO, AE_ERROR,
1118                                         "acpi_sbs_update_run() failed"));
1119                 }
1120         }
1121
1122         if (!battery->battery_present) {
1123                 seq_printf(seq, "present:                 no\n");
1124                 goto end;
1125         }
1126
1127         if (battery->info.capacity_mode) {
1128                 cscale = battery->info.vscale * battery->info.ipscale;
1129         } else {
1130                 cscale = battery->info.ipscale;
1131         }
1132
1133         seq_printf(seq, "alarm:                   ");
1134         if (battery->alarm.remaining_capacity) {
1135                 seq_printf(seq, "%i%s\n",
1136                            battery->alarm.remaining_capacity * cscale,
1137                            battery->info.capacity_mode ? "0 mWh" : " mAh");
1138         } else {
1139                 seq_printf(seq, "disabled\n");
1140         }
1141
1142       end:
1143
1144         sbs_mutex_unlock(sbs);
1145
1146         return result;
1147 }
1148
1149 static ssize_t
1150 acpi_battery_write_alarm(struct file *file, const char __user * buffer,
1151                          size_t count, loff_t * ppos)
1152 {
1153         struct seq_file *seq = file->private_data;
1154         struct acpi_battery *battery = seq->private;
1155         struct acpi_sbs *sbs = battery->sbs;
1156         char alarm_string[12] = { '\0' };
1157         int result, old_alarm, new_alarm;
1158
1159         if (sbs_mutex_lock(sbs)) {
1160                 return -ENODEV;
1161         }
1162
1163         result = acpi_check_update_proc(sbs);
1164         if (result)
1165                 goto end;
1166
1167         if (!battery->battery_present) {
1168                 result = -ENODEV;
1169                 goto end;
1170         }
1171
1172         if (count > sizeof(alarm_string) - 1) {
1173                 result = -EINVAL;
1174                 goto end;
1175         }
1176
1177         if (copy_from_user(alarm_string, buffer, count)) {
1178                 result = -EFAULT;
1179                 goto end;
1180         }
1181
1182         alarm_string[count] = 0;
1183
1184         old_alarm = battery->alarm.remaining_capacity;
1185         new_alarm = simple_strtoul(alarm_string, NULL, 0);
1186
1187         result = acpi_battery_set_alarm(battery, new_alarm);
1188         if (result) {
1189                 ACPI_EXCEPTION((AE_INFO, AE_ERROR,
1190                                 "acpi_battery_set_alarm() failed"));
1191                 acpi_battery_set_alarm(battery, old_alarm);
1192                 goto end;
1193         }
1194         result = acpi_battery_get_alarm(battery);
1195         if (result) {
1196                 ACPI_EXCEPTION((AE_INFO, AE_ERROR,
1197                                 "acpi_battery_get_alarm() failed"));
1198                 acpi_battery_set_alarm(battery, old_alarm);
1199                 goto end;
1200         }
1201
1202       end:
1203         sbs_mutex_unlock(sbs);
1204
1205         if (result) {
1206                 return result;
1207         } else {
1208                 return count;
1209         }
1210 }
1211
1212 static int acpi_battery_alarm_open_fs(struct inode *inode, struct file *file)
1213 {
1214         return single_open(file, acpi_battery_read_alarm, PDE(inode)->data);
1215 }
1216
1217 static struct file_operations acpi_battery_info_fops = {
1218         .open = acpi_battery_info_open_fs,
1219         .read = seq_read,
1220         .llseek = seq_lseek,
1221         .release = single_release,
1222         .owner = THIS_MODULE,
1223 };
1224
1225 static struct file_operations acpi_battery_state_fops = {
1226         .open = acpi_battery_state_open_fs,
1227         .read = seq_read,
1228         .llseek = seq_lseek,
1229         .release = single_release,
1230         .owner = THIS_MODULE,
1231 };
1232
1233 static struct file_operations acpi_battery_alarm_fops = {
1234         .open = acpi_battery_alarm_open_fs,
1235         .read = seq_read,
1236         .write = acpi_battery_write_alarm,
1237         .llseek = seq_lseek,
1238         .release = single_release,
1239         .owner = THIS_MODULE,
1240 };
1241
1242 /* Legacy AC Adapter Interface */
1243
1244 static struct proc_dir_entry *acpi_ac_dir = NULL;
1245
1246 static int acpi_ac_read_state(struct seq_file *seq, void *offset)
1247 {
1248         struct acpi_sbs *sbs = seq->private;
1249         int result;
1250
1251         if (sbs_mutex_lock(sbs)) {
1252                 return -ENODEV;
1253         }
1254
1255         if (update_time == 0) {
1256                 result = acpi_sbs_update_run(sbs, -1, DATA_TYPE_AC_STATE);
1257                 if (result) {
1258                         ACPI_EXCEPTION((AE_INFO, AE_ERROR,
1259                                         "acpi_sbs_update_run() failed"));
1260                 }
1261         }
1262
1263         seq_printf(seq, "state:                   %s\n",
1264                    sbs->ac.ac_present ? "on-line" : "off-line");
1265
1266         sbs_mutex_unlock(sbs);
1267
1268         return 0;
1269 }
1270
1271 static int acpi_ac_state_open_fs(struct inode *inode, struct file *file)
1272 {
1273         return single_open(file, acpi_ac_read_state, PDE(inode)->data);
1274 }
1275
1276 static struct file_operations acpi_ac_state_fops = {
1277         .open = acpi_ac_state_open_fs,
1278         .read = seq_read,
1279         .llseek = seq_lseek,
1280         .release = single_release,
1281         .owner = THIS_MODULE,
1282 };
1283
1284 /* --------------------------------------------------------------------------
1285                                  Driver Interface
1286    -------------------------------------------------------------------------- */
1287
1288 /* Smart Battery */
1289
1290 static int acpi_battery_add(struct acpi_sbs *sbs, int id)
1291 {
1292         int is_present;
1293         int result;
1294         char dir_name[32];
1295         struct acpi_battery *battery;
1296
1297         battery = &sbs->battery[id];
1298
1299         battery->alive = 0;
1300
1301         battery->init_state = 0;
1302         battery->id = id;
1303         battery->sbs = sbs;
1304
1305         result = acpi_battery_select(battery);
1306         if (result) {
1307                 ACPI_EXCEPTION((AE_INFO, AE_ERROR,
1308                                 "acpi_battery_select() failed"));
1309                 goto end;
1310         }
1311
1312         result = acpi_battery_get_present(battery);
1313         if (result) {
1314                 ACPI_EXCEPTION((AE_INFO, AE_ERROR,
1315                                 "acpi_battery_get_present() failed"));
1316                 goto end;
1317         }
1318
1319         is_present = battery->battery_present;
1320
1321         if (is_present) {
1322                 result = acpi_battery_init(battery);
1323                 if (result) {
1324                         ACPI_EXCEPTION((AE_INFO, AE_ERROR,
1325                                         "acpi_battery_init() failed"));
1326                         goto end;
1327                 }
1328                 battery->init_state = 1;
1329         }
1330
1331         sprintf(dir_name, ACPI_BATTERY_DIR_NAME, id);
1332
1333         result = acpi_sbs_generic_add_fs(&battery->battery_entry,
1334                                          acpi_battery_dir,
1335                                          dir_name,
1336                                          &acpi_battery_info_fops,
1337                                          &acpi_battery_state_fops,
1338                                          &acpi_battery_alarm_fops, battery);
1339         if (result) {
1340                 ACPI_EXCEPTION((AE_INFO, AE_ERROR,
1341                                 "acpi_sbs_generic_add_fs() failed"));
1342                 goto end;
1343         }
1344         battery->alive = 1;
1345
1346         printk(KERN_INFO PREFIX "%s [%s]: Battery Slot [%s] (battery %s)\n",
1347                ACPI_SBS_DEVICE_NAME, acpi_device_bid(sbs->device), dir_name,
1348                sbs->battery->battery_present ? "present" : "absent");
1349
1350       end:
1351         return result;
1352 }
1353
1354 static void acpi_battery_remove(struct acpi_sbs *sbs, int id)
1355 {
1356
1357         if (sbs->battery[id].battery_entry) {
1358                 acpi_sbs_generic_remove_fs(&(sbs->battery[id].battery_entry),
1359                                            acpi_battery_dir);
1360         }
1361 }
1362
1363 static int acpi_ac_add(struct acpi_sbs *sbs)
1364 {
1365         int result;
1366
1367         result = acpi_ac_get_present(sbs);
1368         if (result) {
1369                 ACPI_EXCEPTION((AE_INFO, AE_ERROR,
1370                                 "acpi_ac_get_present() failed"));
1371                 goto end;
1372         }
1373
1374         result = acpi_sbs_generic_add_fs(&sbs->ac_entry,
1375                                          acpi_ac_dir,
1376                                          ACPI_AC_DIR_NAME,
1377                                          NULL, &acpi_ac_state_fops, NULL, sbs);
1378         if (result) {
1379                 ACPI_EXCEPTION((AE_INFO, AE_ERROR,
1380                                 "acpi_sbs_generic_add_fs() failed"));
1381                 goto end;
1382         }
1383
1384         printk(KERN_INFO PREFIX "%s [%s]: AC Adapter [%s] (%s)\n",
1385                ACPI_SBS_DEVICE_NAME, acpi_device_bid(sbs->device),
1386                ACPI_AC_DIR_NAME, sbs->ac.ac_present ? "on-line" : "off-line");
1387
1388       end:
1389
1390         return result;
1391 }
1392
1393 static void acpi_ac_remove(struct acpi_sbs *sbs)
1394 {
1395
1396         if (sbs->ac_entry) {
1397                 acpi_sbs_generic_remove_fs(&sbs->ac_entry, acpi_ac_dir);
1398         }
1399 }
1400
1401 static void acpi_sbs_update_time_run(unsigned long data)
1402 {
1403         acpi_os_execute(OSL_GPE_HANDLER, acpi_sbs_update_time, (void *)data);
1404 }
1405
1406 static int acpi_sbs_update_run(struct acpi_sbs *sbs, int id, int data_type)
1407 {
1408         struct acpi_battery *battery;
1409         int result = 0, cnt;
1410         int old_ac_present = -1;
1411         int old_battery_present = -1;
1412         int new_ac_present = -1;
1413         int new_battery_present = -1;
1414         int id_min = 0, id_max = MAX_SBS_BAT - 1;
1415         char dir_name[32];
1416         int do_battery_init = 0, do_ac_init = 0;
1417         int old_remaining_capacity = 0;
1418         int update_battery = 1;
1419         int up_tm = update_time;
1420
1421         if (sbs_zombie(sbs)) {
1422                 goto end;
1423         }
1424
1425         if (id >= 0) {
1426                 id_min = id_max = id;
1427         }
1428
1429         if (data_type == DATA_TYPE_COMMON && up_tm > 0) {
1430                 cnt = up_tm / (up_tm > UPDATE_DELAY ? UPDATE_DELAY : up_tm);
1431                 if (sbs->run_cnt % cnt != 0) {
1432                         update_battery = 0;
1433                 }
1434         }
1435
1436         sbs->run_cnt++;
1437
1438         old_ac_present = sbs->ac.ac_present;
1439
1440         result = acpi_ac_get_present(sbs);
1441         if (result) {
1442                 ACPI_EXCEPTION((AE_INFO, AE_ERROR,
1443                                 "acpi_ac_get_present() failed"));
1444         }
1445
1446         new_ac_present = sbs->ac.ac_present;
1447
1448         do_ac_init = (old_ac_present != new_ac_present);
1449         if (sbs->run_cnt == 1 && data_type == DATA_TYPE_COMMON) {
1450                 do_ac_init = 1;
1451         }
1452
1453         if (do_ac_init) {
1454                 result = acpi_sbs_generate_event(sbs->device,
1455                                                  ACPI_SBS_AC_NOTIFY_STATUS,
1456                                                  new_ac_present,
1457                                                  ACPI_AC_DIR_NAME,
1458                                                  ACPI_AC_CLASS);
1459                 if (result) {
1460                         ACPI_EXCEPTION((AE_INFO, AE_ERROR,
1461                                         "acpi_sbs_generate_event() failed"));
1462                 }
1463         }
1464
1465         if (data_type == DATA_TYPE_COMMON) {
1466                 if (!do_ac_init && !update_battery) {
1467                         goto end;
1468                 }
1469         }
1470
1471         if (data_type == DATA_TYPE_AC_STATE && !do_ac_init) {
1472                 goto end;
1473         }
1474
1475         for (id = id_min; id <= id_max; id++) {
1476                 battery = &sbs->battery[id];
1477                 if (battery->alive == 0) {
1478                         continue;
1479                 }
1480
1481                 old_remaining_capacity = battery->state.remaining_capacity;
1482
1483                 old_battery_present = battery->battery_present;
1484
1485                 result = acpi_battery_select(battery);
1486                 if (result) {
1487                         ACPI_EXCEPTION((AE_INFO, AE_ERROR,
1488                                         "acpi_battery_select() failed"));
1489                 }
1490
1491                 result = acpi_battery_get_present(battery);
1492                 if (result) {
1493                         ACPI_EXCEPTION((AE_INFO, AE_ERROR,
1494                                         "acpi_battery_get_present() failed"));
1495                 }
1496
1497                 new_battery_present = battery->battery_present;
1498
1499                 do_battery_init = ((old_battery_present != new_battery_present)
1500                                    && new_battery_present);
1501                 if (!new_battery_present)
1502                         goto event;
1503                 if (do_ac_init || do_battery_init) {
1504                         result = acpi_battery_init(battery);
1505                         if (result) {
1506                                 ACPI_EXCEPTION((AE_INFO, AE_ERROR,
1507                                                 "acpi_battery_init() "
1508                                                 "failed"));
1509                         }
1510                 }
1511                 if (sbs_zombie(sbs)) {
1512                         goto end;
1513                 }
1514
1515                 if ((data_type == DATA_TYPE_COMMON
1516                      || data_type == DATA_TYPE_INFO)
1517                     && new_battery_present) {
1518                         result = acpi_battery_get_info(battery);
1519                         if (result) {
1520                                 ACPI_EXCEPTION((AE_INFO, AE_ERROR,
1521                                                 "acpi_battery_get_info() failed"));
1522                         }
1523                 }
1524                 if (data_type == DATA_TYPE_INFO) {
1525                         continue;
1526                 }
1527                 if (sbs_zombie(sbs)) {
1528                         goto end;
1529                 }
1530
1531                 if ((data_type == DATA_TYPE_COMMON
1532                      || data_type == DATA_TYPE_STATE)
1533                     && new_battery_present) {
1534                         result = acpi_battery_get_state(battery);
1535                         if (result) {
1536                                 ACPI_EXCEPTION((AE_INFO, AE_ERROR,
1537                                                 "acpi_battery_get_state() failed"));
1538                         }
1539                 }
1540                 if (data_type == DATA_TYPE_STATE) {
1541                         goto event;
1542                 }
1543                 if (sbs_zombie(sbs)) {
1544                         goto end;
1545                 }
1546
1547                 if ((data_type == DATA_TYPE_COMMON
1548                      || data_type == DATA_TYPE_ALARM)
1549                     && new_battery_present) {
1550                         result = acpi_battery_get_alarm(battery);
1551                         if (result) {
1552                                 ACPI_EXCEPTION((AE_INFO, AE_ERROR,
1553                                                 "acpi_battery_get_alarm() "
1554                                                 "failed"));
1555                         }
1556                 }
1557                 if (data_type == DATA_TYPE_ALARM) {
1558                         continue;
1559                 }
1560                 if (sbs_zombie(sbs)) {
1561                         goto end;
1562                 }
1563
1564               event:
1565
1566                 if (old_battery_present != new_battery_present || do_ac_init ||
1567                     old_remaining_capacity !=
1568                     battery->state.remaining_capacity) {
1569                         sprintf(dir_name, ACPI_BATTERY_DIR_NAME, id);
1570                         result = acpi_sbs_generate_event(sbs->device,
1571                                                          ACPI_SBS_BATTERY_NOTIFY_STATUS,
1572                                                          new_battery_present,
1573                                                          dir_name,
1574                                                          ACPI_BATTERY_CLASS);
1575                         if (result) {
1576                                 ACPI_EXCEPTION((AE_INFO, AE_ERROR,
1577                                                 "acpi_sbs_generate_event() "
1578                                                 "failed"));
1579                         }
1580                 }
1581         }
1582
1583       end:
1584
1585         return result;
1586 }
1587
1588 static void acpi_sbs_update_time(void *data)
1589 {
1590         struct acpi_sbs *sbs = data;
1591         unsigned long delay = -1;
1592         int result;
1593         unsigned int up_tm = update_time;
1594
1595         if (sbs_mutex_lock(sbs))
1596                 return;
1597
1598         result = acpi_sbs_update_run(sbs, -1, DATA_TYPE_COMMON);
1599         if (result) {
1600                 ACPI_EXCEPTION((AE_INFO, AE_ERROR,
1601                                 "acpi_sbs_update_run() failed"));
1602         }
1603
1604         if (sbs_zombie(sbs)) {
1605                 goto end;
1606         }
1607
1608         if (!up_tm) {
1609                 if (timer_pending(&sbs->update_timer))
1610                         del_timer(&sbs->update_timer);
1611         } else {
1612                 delay = (up_tm > UPDATE_DELAY ? UPDATE_DELAY : up_tm);
1613                 delay = jiffies + HZ * delay;
1614                 if (timer_pending(&sbs->update_timer)) {
1615                         mod_timer(&sbs->update_timer, delay);
1616                 } else {
1617                         sbs->update_timer.data = (unsigned long)data;
1618                         sbs->update_timer.function = acpi_sbs_update_time_run;
1619                         sbs->update_timer.expires = delay;
1620                         add_timer(&sbs->update_timer);
1621                 }
1622         }
1623
1624       end:
1625
1626         sbs_mutex_unlock(sbs);
1627 }
1628
1629 static int acpi_sbs_add(struct acpi_device *device)
1630 {
1631         struct acpi_sbs *sbs = NULL;
1632         int result = 0, remove_result = 0;
1633         int id;
1634         acpi_status status = AE_OK;
1635         unsigned long val;
1636
1637         status =
1638             acpi_evaluate_integer(device->handle, "_EC", NULL, &val);
1639         if (ACPI_FAILURE(status)) {
1640                 ACPI_EXCEPTION((AE_INFO, AE_ERROR, "Error obtaining _EC"));
1641                 return -EIO;
1642         }
1643
1644         sbs = kzalloc(sizeof(struct acpi_sbs), GFP_KERNEL);
1645         if (!sbs) {
1646                 ACPI_EXCEPTION((AE_INFO, AE_ERROR, "kzalloc() failed"));
1647                 result = -ENOMEM;
1648                 goto end;
1649         }
1650
1651         mutex_init(&sbs->mutex);
1652
1653         sbs_mutex_lock(sbs);
1654
1655         sbs->base = 0xff & (val >> 8);
1656         sbs->device = device;
1657
1658         strcpy(acpi_device_name(device), ACPI_SBS_DEVICE_NAME);
1659         strcpy(acpi_device_class(device), ACPI_SBS_CLASS);
1660         acpi_driver_data(device) = sbs;
1661
1662         result = acpi_ac_add(sbs);
1663         if (result) {
1664                 ACPI_EXCEPTION((AE_INFO, AE_ERROR, "acpi_ac_add() failed"));
1665                 goto end;
1666         }
1667
1668         acpi_sbsm_get_info(sbs);
1669
1670         if (!sbs->sbsm_present) {
1671                 result = acpi_battery_add(sbs, 0);
1672                 if (result) {
1673                         ACPI_EXCEPTION((AE_INFO, AE_ERROR,
1674                                         "acpi_battery_add() failed"));
1675                         goto end;
1676                 }
1677         } else {
1678                 for (id = 0; id < MAX_SBS_BAT; id++) {
1679                         if ((sbs->sbsm_batteries_supported & (1 << id))) {
1680                                 result = acpi_battery_add(sbs, id);
1681                                 if (result) {
1682                                         ACPI_EXCEPTION((AE_INFO, AE_ERROR,
1683                                                         "acpi_battery_add() failed"));
1684                                         goto end;
1685                                 }
1686                         }
1687                 }
1688         }
1689
1690         init_timer(&sbs->update_timer);
1691         result = acpi_check_update_proc(sbs);
1692         if (result)
1693                 goto end;
1694
1695       end:
1696
1697         sbs_mutex_unlock(sbs);
1698
1699         if (result) {
1700                 remove_result = acpi_sbs_remove(device, 0);
1701                 if (remove_result) {
1702                         ACPI_EXCEPTION((AE_INFO, AE_ERROR,
1703                                         "acpi_sbs_remove() failed"));
1704                 }
1705         }
1706
1707         return result;
1708 }
1709
1710 static int acpi_sbs_remove(struct acpi_device *device, int type)
1711 {
1712         struct acpi_sbs *sbs;
1713         int id;
1714
1715         if (!device) {
1716                 return -EINVAL;
1717         }
1718
1719         sbs = acpi_driver_data(device);
1720         if (!sbs) {
1721                 return -EINVAL;
1722         }
1723
1724         sbs_mutex_lock(sbs);
1725
1726         sbs->zombie = 1;
1727         del_timer_sync(&sbs->update_timer);
1728         acpi_os_wait_events_complete(NULL);
1729         del_timer_sync(&sbs->update_timer);
1730
1731         for (id = 0; id < MAX_SBS_BAT; id++) {
1732                 acpi_battery_remove(sbs, id);
1733         }
1734
1735         acpi_ac_remove(sbs);
1736
1737         sbs_mutex_unlock(sbs);
1738
1739         mutex_destroy(&sbs->mutex);
1740
1741         kfree(sbs);
1742
1743         return 0;
1744 }
1745
1746 static void acpi_sbs_rmdirs(void)
1747 {
1748         if (acpi_ac_dir) {
1749                 acpi_unlock_ac_dir(acpi_ac_dir);
1750                 acpi_ac_dir = NULL;
1751         }
1752         if (acpi_battery_dir) {
1753                 acpi_unlock_battery_dir(acpi_battery_dir);
1754                 acpi_battery_dir = NULL;
1755         }
1756 }
1757
1758 static int acpi_sbs_resume(struct acpi_device *device)
1759 {
1760         struct acpi_sbs *sbs;
1761
1762         if (!device)
1763                 return -EINVAL;
1764
1765         sbs = device->driver_data;
1766
1767         sbs->run_cnt = 0;
1768
1769         return 0;
1770 }
1771
1772 static int __init acpi_sbs_init(void)
1773 {
1774         int result = 0;
1775
1776         if (acpi_disabled)
1777                 return -ENODEV;
1778
1779         if (capacity_mode != DEF_CAPACITY_UNIT
1780             && capacity_mode != MAH_CAPACITY_UNIT
1781             && capacity_mode != MWH_CAPACITY_UNIT) {
1782                 ACPI_EXCEPTION((AE_INFO, AE_ERROR,
1783                                 "invalid capacity_mode = %d", capacity_mode));
1784                 return -EINVAL;
1785         }
1786
1787         acpi_ac_dir = acpi_lock_ac_dir();
1788         if (!acpi_ac_dir) {
1789                 ACPI_EXCEPTION((AE_INFO, AE_ERROR,
1790                                 "acpi_lock_ac_dir() failed"));
1791                 return -ENODEV;
1792         }
1793
1794         acpi_battery_dir = acpi_lock_battery_dir();
1795         if (!acpi_battery_dir) {
1796                 ACPI_EXCEPTION((AE_INFO, AE_ERROR,
1797                                 "acpi_lock_battery_dir() failed"));
1798                 acpi_sbs_rmdirs();
1799                 return -ENODEV;
1800         }
1801
1802         result = acpi_bus_register_driver(&acpi_sbs_driver);
1803         if (result < 0) {
1804                 ACPI_EXCEPTION((AE_INFO, AE_ERROR,
1805                                 "acpi_bus_register_driver() failed"));
1806                 acpi_sbs_rmdirs();
1807                 return -ENODEV;
1808         }
1809
1810         return 0;
1811 }
1812
1813 static void __exit acpi_sbs_exit(void)
1814 {
1815         acpi_bus_unregister_driver(&acpi_sbs_driver);
1816
1817         acpi_sbs_rmdirs();
1818
1819         return;
1820 }
1821
1822 module_init(acpi_sbs_init);
1823 module_exit(acpi_sbs_exit);