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_proc_event(device, event, state);
 444
 445         strcpy(acpi_device_bid(device), bid_saved);
 446         strcpy(acpi_device_class(device), class_saved);
 447
 448         acpi_bus_generate_netlink_event(class, bid, event, state);
 449         return result;
 450 }
 451
 452 static int acpi_battery_get_present(struct acpi_battery *battery)
 453 {
 454         s16 state;
 455         int result = 0;
 456         int is_present = 0;
 457
 458         result = acpi_sbs_read_word(battery->sbs,
 459                                     ACPI_SBSM_SMBUS_ADDR, 0x01, &state);
 460         if (result) {
 461                 ACPI_EXCEPTION((AE_INFO, AE_ERROR,
 462                                 "acpi_sbs_read_word() failed"));
 463         }
 464         if (!result) {
 465                 is_present = (state & 0x000f) & (1 << battery->id);
 466         }
 467         battery->battery_present = is_present;
 468
 469         return result;
 470 }
 471
 472 static int acpi_battery_select(struct acpi_battery *battery)
 473 {
 474         struct acpi_sbs *sbs = battery->sbs;
 475         int result = 0;
 476         s16 state;
 477         int foo;
 478
 479         if (sbs->sbsm_present) {
 480
 481                 /* Take special care not to knobble other nibbles of
 482                  * state (aka selector_state), since
 483                  * it causes charging to halt on SBSELs */
 484
 485                 result =
 486                     acpi_sbs_read_word(sbs, ACPI_SBSM_SMBUS_ADDR, 0x01, &state);
 487                 if (result) {
 488                         ACPI_EXCEPTION((AE_INFO, AE_ERROR,
 489                                         "acpi_sbs_read_word() failed"));
 490                         goto end;
 491                 }
 492
 493                 foo = (state & 0x0fff) | (1 << (battery->id + 12));
 494                 result =
 495                     acpi_sbs_write_word(sbs, ACPI_SBSM_SMBUS_ADDR, 0x01, foo);
 496                 if (result) {
 497                         ACPI_EXCEPTION((AE_INFO, AE_ERROR,
 498                                         "acpi_sbs_write_word() failed"));
 499                         goto end;
 500                 }
 501         }
 502
 503       end:
 504         return result;
 505 }
 506
 507 static int acpi_sbsm_get_info(struct acpi_sbs *sbs)
 508 {
 509         int result = 0;
 510         s16 battery_system_info;
 511
 512         result = acpi_sbs_read_word(sbs, ACPI_SBSM_SMBUS_ADDR, 0x04,
 513                                     &battery_system_info);
 514         if (result) {
 515                 ACPI_EXCEPTION((AE_INFO, AE_ERROR,
 516                                 "acpi_sbs_read_word() failed"));
 517                 goto end;
 518         }
 519         sbs->sbsm_present = 1;
 520         sbs->sbsm_batteries_supported = battery_system_info & 0x000f;
 521
 522       end:
 523
 524         return result;
 525 }
 526
 527 static int acpi_battery_get_info(struct acpi_battery *battery)
 528 {
 529         struct acpi_sbs *sbs = battery->sbs;
 530         int result = 0;
 531         s16 battery_mode;
 532         s16 specification_info;
 533
 534         result = acpi_sbs_read_word(sbs, ACPI_SB_SMBUS_ADDR, 0x03,
 535                                     &battery_mode);
 536         if (result) {
 537                 ACPI_EXCEPTION((AE_INFO, AE_ERROR,
 538                                 "acpi_sbs_read_word() failed"));
 539                 goto end;
 540         }
 541         battery->info.capacity_mode = (battery_mode & 0x8000) >> 15;
 542
 543         result = acpi_sbs_read_word(sbs, ACPI_SB_SMBUS_ADDR, 0x10,
 544                                     &battery->info.full_charge_capacity);
 545         if (result) {
 546                 ACPI_EXCEPTION((AE_INFO, AE_ERROR,
 547                                 "acpi_sbs_read_word() failed"));
 548                 goto end;
 549         }
 550
 551         result = acpi_sbs_read_word(sbs, ACPI_SB_SMBUS_ADDR, 0x18,
 552                                     &battery->info.design_capacity);
 553
 554         if (result) {
 555                 ACPI_EXCEPTION((AE_INFO, AE_ERROR,
 556                                 "acpi_sbs_read_word() failed"));
 557                 goto end;
 558         }
 559
 560         result = acpi_sbs_read_word(sbs, ACPI_SB_SMBUS_ADDR, 0x19,
 561                                     &battery->info.design_voltage);
 562         if (result) {
 563                 ACPI_EXCEPTION((AE_INFO, AE_ERROR,
 564                                 "acpi_sbs_read_word() failed"));
 565                 goto end;
 566         }
 567
 568         result = acpi_sbs_read_word(sbs, ACPI_SB_SMBUS_ADDR, 0x1a,
 569                                     &specification_info);
 570         if (result) {
 571                 ACPI_EXCEPTION((AE_INFO, AE_ERROR,
 572                                 "acpi_sbs_read_word() failed"));
 573                 goto end;
 574         }
 575
 576         switch ((specification_info & 0x0f00) >> 8) {
 577         case 1:
 578                 battery->info.vscale = 10;
 579                 break;
 580         case 2:
 581                 battery->info.vscale = 100;
 582                 break;
 583         case 3:
 584                 battery->info.vscale = 1000;
 585                 break;
 586         default:
 587                 battery->info.vscale = 1;
 588         }
 589
 590         switch ((specification_info & 0xf000) >> 12) {
 591         case 1:
 592                 battery->info.ipscale = 10;
 593                 break;
 594         case 2:
 595                 battery->info.ipscale = 100;
 596                 break;
 597         case 3:
 598                 battery->info.ipscale = 1000;
 599                 break;
 600         default:
 601                 battery->info.ipscale = 1;
 602         }
 603
 604         result = acpi_sbs_read_word(sbs, ACPI_SB_SMBUS_ADDR, 0x1c,
 605                                     &battery->info.serial_number);
 606         if (result) {
 607                 ACPI_EXCEPTION((AE_INFO, AE_ERROR,
 608                                 "acpi_sbs_read_word() failed"));
 609                 goto end;
 610         }
 611
 612         result = acpi_sbs_read_str(sbs, ACPI_SB_SMBUS_ADDR, 0x20,
 613                                    battery->info.manufacturer_name);
 614         if (result) {
 615                 ACPI_EXCEPTION((AE_INFO, AE_ERROR,
 616                                 "acpi_sbs_read_str() failed"));
 617                 goto end;
 618         }
 619
 620         result = acpi_sbs_read_str(sbs, ACPI_SB_SMBUS_ADDR, 0x21,
 621                                    battery->info.device_name);
 622         if (result) {
 623                 ACPI_EXCEPTION((AE_INFO, AE_ERROR,
 624                                 "acpi_sbs_read_str() failed"));
 625                 goto end;
 626         }
 627
 628         result = acpi_sbs_read_str(sbs, ACPI_SB_SMBUS_ADDR, 0x22,
 629                                    battery->info.device_chemistry);
 630         if (result) {
 631                 ACPI_EXCEPTION((AE_INFO, AE_ERROR,
 632                                 "acpi_sbs_read_str() failed"));
 633                 goto end;
 634         }
 635
 636       end:
 637         return result;
 638 }
 639
 640 static int acpi_battery_get_state(struct acpi_battery *battery)
 641 {
 642         struct acpi_sbs *sbs = battery->sbs;
 643         int result = 0;
 644
 645         result = acpi_sbs_read_word(sbs, ACPI_SB_SMBUS_ADDR, 0x09,
 646                                     &battery->state.voltage);
 647         if (result) {
 648                 ACPI_EXCEPTION((AE_INFO, AE_ERROR,
 649                                 "acpi_sbs_read_word() failed"));
 650                 goto end;
 651         }
 652
 653         result = acpi_sbs_read_word(sbs, ACPI_SB_SMBUS_ADDR, 0x0a,
 654                                     &battery->state.amperage);
 655         if (result) {
 656                 ACPI_EXCEPTION((AE_INFO, AE_ERROR,
 657                                 "acpi_sbs_read_word() failed"));
 658                 goto end;
 659         }
 660
 661         result = acpi_sbs_read_word(sbs, ACPI_SB_SMBUS_ADDR, 0x0f,
 662                                     &battery->state.remaining_capacity);
 663         if (result) {
 664                 ACPI_EXCEPTION((AE_INFO, AE_ERROR,
 665                                 "acpi_sbs_read_word() failed"));
 666                 goto end;
 667         }
 668
 669         result = acpi_sbs_read_word(sbs, ACPI_SB_SMBUS_ADDR, 0x16,
 670                                     &battery->state.battery_state);
 671         if (result) {
 672                 ACPI_EXCEPTION((AE_INFO, AE_ERROR,
 673                                 "acpi_sbs_read_word() failed"));
 674                 goto end;
 675         }
 676
 677       end:
 678         return result;
 679 }
 680
 681 static int acpi_battery_get_alarm(struct acpi_battery *battery)
 682 {
 683         struct acpi_sbs *sbs = battery->sbs;
 684         int result = 0;
 685
 686         result = acpi_sbs_read_word(sbs, ACPI_SB_SMBUS_ADDR, 0x01,
 687                                     &battery->alarm.remaining_capacity);
 688         if (result) {
 689                 ACPI_EXCEPTION((AE_INFO, AE_ERROR,
 690                                 "acpi_sbs_read_word() failed"));
 691                 goto end;
 692         }
 693
 694       end:
 695
 696         return result;
 697 }
 698
 699 static int acpi_battery_set_alarm(struct acpi_battery *battery,
 700                                   unsigned long alarm)
 701 {
 702         struct acpi_sbs *sbs = battery->sbs;
 703         int result = 0;
 704         s16 battery_mode;
 705         int foo;
 706
 707         result = acpi_battery_select(battery);
 708         if (result) {
 709                 ACPI_EXCEPTION((AE_INFO, AE_ERROR,
 710                                 "acpi_battery_select() failed"));
 711                 goto end;
 712         }
 713
 714         /* If necessary, enable the alarm */
 715
 716         if (alarm > 0) {
 717                 result =
 718                     acpi_sbs_read_word(sbs, ACPI_SB_SMBUS_ADDR, 0x03,
 719                                        &battery_mode);
 720                 if (result) {
 721                         ACPI_EXCEPTION((AE_INFO, AE_ERROR,
 722                                         "acpi_sbs_read_word() failed"));
 723                         goto end;
 724                 }
 725
 726                 result =
 727                     acpi_sbs_write_word(sbs, ACPI_SB_SMBUS_ADDR, 0x01,
 728                                         battery_mode & 0xbfff);
 729                 if (result) {
 730                         ACPI_EXCEPTION((AE_INFO, AE_ERROR,
 731                                         "acpi_sbs_write_word() failed"));
 732                         goto end;
 733                 }
 734         }
 735
 736         foo = alarm / (battery->info.capacity_mode ? 10 : 1);
 737         result = acpi_sbs_write_word(sbs, ACPI_SB_SMBUS_ADDR, 0x01, foo);
 738         if (result) {
 739                 ACPI_EXCEPTION((AE_INFO, AE_ERROR,
 740                                 "acpi_sbs_write_word() failed"));
 741                 goto end;
 742         }
 743
 744       end:
 745
 746         return result;
 747 }
 748
 749 static int acpi_battery_set_mode(struct acpi_battery *battery)
 750 {
 751         struct acpi_sbs *sbs = battery->sbs;
 752         int result = 0;
 753         s16 battery_mode;
 754
 755         if (capacity_mode == DEF_CAPACITY_UNIT) {
 756                 goto end;
 757         }
 758
 759         result = acpi_sbs_read_word(sbs,
 760                                     ACPI_SB_SMBUS_ADDR, 0x03, &battery_mode);
 761         if (result) {
 762                 ACPI_EXCEPTION((AE_INFO, AE_ERROR,
 763                                 "acpi_sbs_read_word() failed"));
 764                 goto end;
 765         }
 766
 767         if (capacity_mode == MAH_CAPACITY_UNIT) {
 768                 battery_mode &= 0x7fff;
 769         } else {
 770                 battery_mode |= 0x8000;
 771         }
 772         result = acpi_sbs_write_word(sbs,
 773                                      ACPI_SB_SMBUS_ADDR, 0x03, battery_mode);
 774         if (result) {
 775                 ACPI_EXCEPTION((AE_INFO, AE_ERROR,
 776                                 "acpi_sbs_write_word() failed"));
 777                 goto end;
 778         }
 779
 780         result = acpi_sbs_read_word(sbs,
 781                                     ACPI_SB_SMBUS_ADDR, 0x03, &battery_mode);
 782         if (result) {
 783                 ACPI_EXCEPTION((AE_INFO, AE_ERROR,
 784                                 "acpi_sbs_read_word() failed"));
 785                 goto end;
 786         }
 787
 788       end:
 789         return result;
 790 }
 791
 792 static int acpi_battery_init(struct acpi_battery *battery)
 793 {
 794         int result = 0;
 795
 796         result = acpi_battery_select(battery);
 797         if (result) {
 798                 ACPI_EXCEPTION((AE_INFO, AE_ERROR,
 799                                 "acpi_battery_select() failed"));
 800                 goto end;
 801         }
 802
 803         result = acpi_battery_set_mode(battery);
 804         if (result) {
 805                 ACPI_EXCEPTION((AE_INFO, AE_ERROR,
 806                                 "acpi_battery_set_mode() failed"));
 807                 goto end;
 808         }
 809
 810         result = acpi_battery_get_info(battery);
 811         if (result) {
 812                 ACPI_EXCEPTION((AE_INFO, AE_ERROR,
 813                                 "acpi_battery_get_info() failed"));
 814                 goto end;
 815         }
 816
 817         result = acpi_battery_get_state(battery);
 818         if (result) {
 819                 ACPI_EXCEPTION((AE_INFO, AE_ERROR,
 820                                 "acpi_battery_get_state() failed"));
 821                 goto end;
 822         }
 823
 824         result = acpi_battery_get_alarm(battery);
 825         if (result) {
 826                 ACPI_EXCEPTION((AE_INFO, AE_ERROR,
 827                                 "acpi_battery_get_alarm() failed"));
 828                 goto end;
 829         }
 830
 831       end:
 832         return result;
 833 }
 834
 835 static int acpi_ac_get_present(struct acpi_sbs *sbs)
 836 {
 837         int result = 0;
 838         s16 charger_status;
 839
 840         result = acpi_sbs_read_word(sbs, ACPI_SBC_SMBUS_ADDR, 0x13,
 841                                     &charger_status);
 842
 843         if (result) {
 844                 ACPI_EXCEPTION((AE_INFO, AE_ERROR,
 845                                 "acpi_sbs_read_word() failed"));
 846                 goto end;
 847         }
 848
 849         sbs->ac.ac_present = (charger_status & 0x8000) >> 15;
 850
 851       end:
 852
 853         return result;
 854 }
 855
 856 /* --------------------------------------------------------------------------
 857                               FS Interface (/proc/acpi)
 858    -------------------------------------------------------------------------- */
 859
 860 /* Generic Routines */
 861
 862 static int
 863 acpi_sbs_generic_add_fs(struct proc_dir_entry **dir,
 864                         struct proc_dir_entry *parent_dir,
 865                         char *dir_name,
 866                         struct file_operations *info_fops,
 867                         struct file_operations *state_fops,
 868                         struct file_operations *alarm_fops, void *data)
 869 {
 870         struct proc_dir_entry *entry = NULL;
 871
 872         if (!*dir) {
 873                 *dir = proc_mkdir(dir_name, parent_dir);
 874                 if (!*dir) {
 875                         ACPI_EXCEPTION((AE_INFO, AE_ERROR,
 876                                         "proc_mkdir() failed"));
 877                         return -ENODEV;
 878                 }
 879                 (*dir)->owner = THIS_MODULE;
 880         }
 881
 882         /* 'info' [R] */
 883         if (info_fops) {
 884                 entry = create_proc_entry(ACPI_SBS_FILE_INFO, S_IRUGO, *dir);
 885                 if (!entry) {
 886                         ACPI_EXCEPTION((AE_INFO, AE_ERROR,
 887                                         "create_proc_entry() failed"));
 888                 } else {
 889                         entry->proc_fops = info_fops;
 890                         entry->data = data;
 891                         entry->owner = THIS_MODULE;
 892                 }
 893         }
 894
 895         /* 'state' [R] */
 896         if (state_fops) {
 897                 entry = create_proc_entry(ACPI_SBS_FILE_STATE, S_IRUGO, *dir);
 898                 if (!entry) {
 899                         ACPI_EXCEPTION((AE_INFO, AE_ERROR,
 900                                         "create_proc_entry() failed"));
 901                 } else {
 902                         entry->proc_fops = state_fops;
 903                         entry->data = data;
 904                         entry->owner = THIS_MODULE;
 905                 }
 906         }
 907
 908         /* 'alarm' [R/W] */
 909         if (alarm_fops) {
 910                 entry = create_proc_entry(ACPI_SBS_FILE_ALARM, S_IRUGO, *dir);
 911                 if (!entry) {
 912                         ACPI_EXCEPTION((AE_INFO, AE_ERROR,
 913                                         "create_proc_entry() failed"));
 914                 } else {
 915                         entry->proc_fops = alarm_fops;
 916                         entry->data = data;
 917                         entry->owner = THIS_MODULE;
 918                 }
 919         }
 920
 921         return 0;
 922 }
 923
 924 static void
 925 acpi_sbs_generic_remove_fs(struct proc_dir_entry **dir,
 926                            struct proc_dir_entry *parent_dir)
 927 {
 928
 929         if (*dir) {
 930                 remove_proc_entry(ACPI_SBS_FILE_INFO, *dir);
 931                 remove_proc_entry(ACPI_SBS_FILE_STATE, *dir);
 932                 remove_proc_entry(ACPI_SBS_FILE_ALARM, *dir);
 933                 remove_proc_entry((*dir)->name, parent_dir);
 934                 *dir = NULL;
 935         }
 936
 937 }
 938
 939 /* Smart Battery Interface */
 940
 941 static struct proc_dir_entry *acpi_battery_dir = NULL;
 942
 943 static int acpi_battery_read_info(struct seq_file *seq, void *offset)
 944 {
 945         struct acpi_battery *battery = seq->private;
 946         struct acpi_sbs *sbs = battery->sbs;
 947         int cscale;
 948         int result = 0;
 949
 950         if (sbs_mutex_lock(sbs)) {
 951                 return -ENODEV;
 952         }
 953
 954         result = acpi_check_update_proc(sbs);
 955         if (result)
 956                 goto end;
 957
 958         if (update_time == 0) {
 959                 result = acpi_sbs_update_run(sbs, battery->id, DATA_TYPE_INFO);
 960                 if (result) {
 961                         ACPI_EXCEPTION((AE_INFO, AE_ERROR,
 962                                         "acpi_sbs_update_run() failed"));
 963                 }
 964         }
 965
 966         if (battery->battery_present) {
 967                 seq_printf(seq, "present:                 yes\n");
 968         } else {
 969                 seq_printf(seq, "present:                 no\n");
 970                 goto end;
 971         }
 972
 973         if (battery->info.capacity_mode) {
 974                 cscale = battery->info.vscale * battery->info.ipscale;
 975         } else {
 976                 cscale = battery->info.ipscale;
 977         }
 978         seq_printf(seq, "design capacity:         %i%s\n",
 979                    battery->info.design_capacity * cscale,
 980                    battery->info.capacity_mode ? "0 mWh" : " mAh");
 981
 982         seq_printf(seq, "last full capacity:      %i%s\n",
 983                    battery->info.full_charge_capacity * cscale,
 984                    battery->info.capacity_mode ? "0 mWh" : " mAh");
 985
 986         seq_printf(seq, "battery technology:      rechargeable\n");
 987
 988         seq_printf(seq, "design voltage:          %i mV\n",
 989                    battery->info.design_voltage * battery->info.vscale);
 990
 991         seq_printf(seq, "design capacity warning: unknown\n");
 992         seq_printf(seq, "design capacity low:     unknown\n");
 993         seq_printf(seq, "capacity granularity 1:  unknown\n");
 994         seq_printf(seq, "capacity granularity 2:  unknown\n");
 995
 996         seq_printf(seq, "model number:            %s\n",
 997                    battery->info.device_name);
 998
 999         seq_printf(seq, "serial number:           %i\n",
1000                    battery->info.serial_number);
1001
1002         seq_printf(seq, "battery type:            %s\n",
1003                    battery->info.device_chemistry);
1004
1005         seq_printf(seq, "OEM info:                %s\n",
1006                    battery->info.manufacturer_name);
1007
1008       end:
1009
1010         sbs_mutex_unlock(sbs);
1011
1012         return result;
1013 }
1014
1015 static int acpi_battery_info_open_fs(struct inode *inode, struct file *file)
1016 {
1017         return single_open(file, acpi_battery_read_info, PDE(inode)->data);
1018 }
1019
1020 static int acpi_battery_read_state(struct seq_file *seq, void *offset)
1021 {
1022         struct acpi_battery *battery = seq->private;
1023         struct acpi_sbs *sbs = battery->sbs;
1024         int result = 0;
1025         int cscale;
1026         int foo;
1027
1028         if (sbs_mutex_lock(sbs)) {
1029                 return -ENODEV;
1030         }
1031
1032         result = acpi_check_update_proc(sbs);
1033         if (result)
1034                 goto end;
1035
1036         if (update_time == 0) {
1037                 result = acpi_sbs_update_run(sbs, battery->id, DATA_TYPE_STATE);
1038                 if (result) {
1039                         ACPI_EXCEPTION((AE_INFO, AE_ERROR,
1040                                         "acpi_sbs_update_run() failed"));
1041                 }
1042         }
1043
1044         if (battery->battery_present) {
1045                 seq_printf(seq, "present:                 yes\n");
1046         } else {
1047                 seq_printf(seq, "present:                 no\n");
1048                 goto end;
1049         }
1050
1051         if (battery->info.capacity_mode) {
1052                 cscale = battery->info.vscale * battery->info.ipscale;
1053         } else {
1054                 cscale = battery->info.ipscale;
1055         }
1056
1057         if (battery->state.battery_state & 0x0010) {
1058                 seq_printf(seq, "capacity state:          critical\n");
1059         } else {
1060                 seq_printf(seq, "capacity state:          ok\n");
1061         }
1062
1063         foo = (s16) battery->state.amperage * battery->info.ipscale;
1064         if (battery->info.capacity_mode) {
1065                 foo = foo * battery->info.design_voltage / 1000;
1066         }
1067         if (battery->state.amperage < 0) {
1068                 seq_printf(seq, "charging state:          discharging\n");
1069                 seq_printf(seq, "present rate:            %d %s\n",
1070                            -foo, battery->info.capacity_mode ? "mW" : "mA");
1071         } else if (battery->state.amperage > 0) {
1072                 seq_printf(seq, "charging state:          charging\n");
1073                 seq_printf(seq, "present rate:            %d %s\n",
1074                            foo, battery->info.capacity_mode ? "mW" : "mA");
1075         } else {
1076                 seq_printf(seq, "charging state:          charged\n");
1077                 seq_printf(seq, "present rate:            0 %s\n",
1078                            battery->info.capacity_mode ? "mW" : "mA");
1079         }
1080
1081         seq_printf(seq, "remaining capacity:      %i%s\n",
1082                    battery->state.remaining_capacity * cscale,
1083                    battery->info.capacity_mode ? "0 mWh" : " mAh");
1084
1085         seq_printf(seq, "present voltage:         %i mV\n",
1086                    battery->state.voltage * battery->info.vscale);
1087
1088       end:
1089
1090         sbs_mutex_unlock(sbs);
1091
1092         return result;
1093 }
1094
1095 static int acpi_battery_state_open_fs(struct inode *inode, struct file *file)
1096 {
1097         return single_open(file, acpi_battery_read_state, PDE(inode)->data);
1098 }
1099
1100 static int acpi_battery_read_alarm(struct seq_file *seq, void *offset)
1101 {
1102         struct acpi_battery *battery = seq->private;
1103         struct acpi_sbs *sbs = battery->sbs;
1104         int result = 0;
1105         int cscale;
1106
1107         if (sbs_mutex_lock(sbs)) {
1108                 return -ENODEV;
1109         }
1110
1111         result = acpi_check_update_proc(sbs);
1112         if (result)
1113                 goto end;
1114
1115         if (update_time == 0) {
1116                 result = acpi_sbs_update_run(sbs, battery->id, DATA_TYPE_ALARM);
1117                 if (result) {
1118                         ACPI_EXCEPTION((AE_INFO, AE_ERROR,
1119                                         "acpi_sbs_update_run() failed"));
1120                 }
1121         }
1122
1123         if (!battery->battery_present) {
1124                 seq_printf(seq, "present:                 no\n");
1125                 goto end;
1126         }
1127
1128         if (battery->info.capacity_mode) {
1129                 cscale = battery->info.vscale * battery->info.ipscale;
1130         } else {
1131                 cscale = battery->info.ipscale;
1132         }
1133
1134         seq_printf(seq, "alarm:                   ");
1135         if (battery->alarm.remaining_capacity) {
1136                 seq_printf(seq, "%i%s\n",
1137                            battery->alarm.remaining_capacity * cscale,
1138                            battery->info.capacity_mode ? "0 mWh" : " mAh");
1139         } else {
1140                 seq_printf(seq, "disabled\n");
1141         }
1142
1143       end:
1144
1145         sbs_mutex_unlock(sbs);
1146
1147         return result;
1148 }
1149
1150 static ssize_t
1151 acpi_battery_write_alarm(struct file *file, const char __user * buffer,
1152                          size_t count, loff_t * ppos)
1153 {
1154         struct seq_file *seq = file->private_data;
1155         struct acpi_battery *battery = seq->private;
1156         struct acpi_sbs *sbs = battery->sbs;
1157         char alarm_string[12] = { '\0' };
1158         int result, old_alarm, new_alarm;
1159
1160         if (sbs_mutex_lock(sbs)) {
1161                 return -ENODEV;
1162         }
1163
1164         result = acpi_check_update_proc(sbs);
1165         if (result)
1166                 goto end;
1167
1168         if (!battery->battery_present) {
1169                 result = -ENODEV;
1170                 goto end;
1171         }
1172
1173         if (count > sizeof(alarm_string) - 1) {
1174                 result = -EINVAL;
1175                 goto end;
1176         }
1177
1178         if (copy_from_user(alarm_string, buffer, count)) {
1179                 result = -EFAULT;
1180                 goto end;
1181         }
1182
1183         alarm_string[count] = 0;
1184
1185         old_alarm = battery->alarm.remaining_capacity;
1186         new_alarm = simple_strtoul(alarm_string, NULL, 0);
1187
1188         result = acpi_battery_set_alarm(battery, new_alarm);
1189         if (result) {
1190                 ACPI_EXCEPTION((AE_INFO, AE_ERROR,
1191                                 "acpi_battery_set_alarm() failed"));
1192                 acpi_battery_set_alarm(battery, old_alarm);
1193                 goto end;
1194         }
1195         result = acpi_battery_get_alarm(battery);
1196         if (result) {
1197                 ACPI_EXCEPTION((AE_INFO, AE_ERROR,
1198                                 "acpi_battery_get_alarm() failed"));
1199                 acpi_battery_set_alarm(battery, old_alarm);
1200                 goto end;
1201         }
1202
1203       end:
1204         sbs_mutex_unlock(sbs);
1205
1206         if (result) {
1207                 return result;
1208         } else {
1209                 return count;
1210         }
1211 }
1212
1213 static int acpi_battery_alarm_open_fs(struct inode *inode, struct file *file)
1214 {
1215         return single_open(file, acpi_battery_read_alarm, PDE(inode)->data);
1216 }
1217
1218 static struct file_operations acpi_battery_info_fops = {
1219         .open = acpi_battery_info_open_fs,
1220         .read = seq_read,
1221         .llseek = seq_lseek,
1222         .release = single_release,
1223         .owner = THIS_MODULE,
1224 };
1225
1226 static struct file_operations acpi_battery_state_fops = {
1227         .open = acpi_battery_state_open_fs,
1228         .read = seq_read,
1229         .llseek = seq_lseek,
1230         .release = single_release,
1231         .owner = THIS_MODULE,
1232 };
1233
1234 static struct file_operations acpi_battery_alarm_fops = {
1235         .open = acpi_battery_alarm_open_fs,
1236         .read = seq_read,
1237         .write = acpi_battery_write_alarm,
1238         .llseek = seq_lseek,
1239         .release = single_release,
1240         .owner = THIS_MODULE,
1241 };
1242
1243 /* Legacy AC Adapter Interface */
1244
1245 static struct proc_dir_entry *acpi_ac_dir = NULL;
1246
1247 static int acpi_ac_read_state(struct seq_file *seq, void *offset)
1248 {
1249         struct acpi_sbs *sbs = seq->private;
1250         int result;
1251
1252         if (sbs_mutex_lock(sbs)) {
1253                 return -ENODEV;
1254         }
1255
1256         if (update_time == 0) {
1257                 result = acpi_sbs_update_run(sbs, -1, DATA_TYPE_AC_STATE);
1258                 if (result) {
1259                         ACPI_EXCEPTION((AE_INFO, AE_ERROR,
1260                                         "acpi_sbs_update_run() failed"));
1261                 }
1262         }
1263
1264         seq_printf(seq, "state:                   %s\n",
1265                    sbs->ac.ac_present ? "on-line" : "off-line");
1266
1267         sbs_mutex_unlock(sbs);
1268
1269         return 0;
1270 }
1271
1272 static int acpi_ac_state_open_fs(struct inode *inode, struct file *file)
1273 {
1274         return single_open(file, acpi_ac_read_state, PDE(inode)->data);
1275 }
1276
1277 static struct file_operations acpi_ac_state_fops = {
1278         .open = acpi_ac_state_open_fs,
1279         .read = seq_read,
1280         .llseek = seq_lseek,
1281         .release = single_release,
1282         .owner = THIS_MODULE,
1283 };
1284
1285 /* --------------------------------------------------------------------------
1286                                  Driver Interface
1287    -------------------------------------------------------------------------- */
1288
1289 /* Smart Battery */
1290
1291 static int acpi_battery_add(struct acpi_sbs *sbs, int id)
1292 {
1293         int is_present;
1294         int result;
1295         char dir_name[32];
1296         struct acpi_battery *battery;
1297
1298         battery = &sbs->battery[id];
1299
1300         battery->alive = 0;
1301
1302         battery->init_state = 0;
1303         battery->id = id;
1304         battery->sbs = sbs;
1305
1306         result = acpi_battery_select(battery);
1307         if (result) {
1308                 ACPI_EXCEPTION((AE_INFO, AE_ERROR,
1309                                 "acpi_battery_select() failed"));
1310                 goto end;
1311         }
1312
1313         result = acpi_battery_get_present(battery);
1314         if (result) {
1315                 ACPI_EXCEPTION((AE_INFO, AE_ERROR,
1316                                 "acpi_battery_get_present() failed"));
1317                 goto end;
1318         }
1319
1320         is_present = battery->battery_present;
1321
1322         if (is_present) {
1323                 result = acpi_battery_init(battery);
1324                 if (result) {
1325                         ACPI_EXCEPTION((AE_INFO, AE_ERROR,
1326                                         "acpi_battery_init() failed"));
1327                         goto end;
1328                 }
1329                 battery->init_state = 1;
1330         }
1331
1332         sprintf(dir_name, ACPI_BATTERY_DIR_NAME, id);
1333
1334         result = acpi_sbs_generic_add_fs(&battery->battery_entry,
1335                                          acpi_battery_dir,
1336                                          dir_name,
1337                                          &acpi_battery_info_fops,
1338                                          &acpi_battery_state_fops,
1339                                          &acpi_battery_alarm_fops, battery);
1340         if (result) {
1341                 ACPI_EXCEPTION((AE_INFO, AE_ERROR,
1342                                 "acpi_sbs_generic_add_fs() failed"));
1343                 goto end;
1344         }
1345         battery->alive = 1;
1346
1347         printk(KERN_INFO PREFIX "%s [%s]: Battery Slot [%s] (battery %s)\n",
1348                ACPI_SBS_DEVICE_NAME, acpi_device_bid(sbs->device), dir_name,
1349                sbs->battery->battery_present ? "present" : "absent");
1350
1351       end:
1352         return result;
1353 }
1354
1355 static void acpi_battery_remove(struct acpi_sbs *sbs, int id)
1356 {
1357
1358         if (sbs->battery[id].battery_entry) {
1359                 acpi_sbs_generic_remove_fs(&(sbs->battery[id].battery_entry),
1360                                            acpi_battery_dir);
1361         }
1362 }
1363
1364 static int acpi_ac_add(struct acpi_sbs *sbs)
1365 {
1366         int result;
1367
1368         result = acpi_ac_get_present(sbs);
1369         if (result) {
1370                 ACPI_EXCEPTION((AE_INFO, AE_ERROR,
1371                                 "acpi_ac_get_present() failed"));
1372                 goto end;
1373         }
1374
1375         result = acpi_sbs_generic_add_fs(&sbs->ac_entry,
1376                                          acpi_ac_dir,
1377                                          ACPI_AC_DIR_NAME,
1378                                          NULL, &acpi_ac_state_fops, NULL, sbs);
1379         if (result) {
1380                 ACPI_EXCEPTION((AE_INFO, AE_ERROR,
1381                                 "acpi_sbs_generic_add_fs() failed"));
1382                 goto end;
1383         }
1384
1385         printk(KERN_INFO PREFIX "%s [%s]: AC Adapter [%s] (%s)\n",
1386                ACPI_SBS_DEVICE_NAME, acpi_device_bid(sbs->device),
1387                ACPI_AC_DIR_NAME, sbs->ac.ac_present ? "on-line" : "off-line");
1388
1389       end:
1390
1391         return result;
1392 }
1393
1394 static void acpi_ac_remove(struct acpi_sbs *sbs)
1395 {
1396
1397         if (sbs->ac_entry) {
1398                 acpi_sbs_generic_remove_fs(&sbs->ac_entry, acpi_ac_dir);
1399         }
1400 }
1401
1402 static void acpi_sbs_update_time_run(unsigned long data)
1403 {
1404         acpi_os_execute(OSL_GPE_HANDLER, acpi_sbs_update_time, (void *)data);
1405 }
1406
1407 static int acpi_sbs_update_run(struct acpi_sbs *sbs, int id, int data_type)
1408 {
1409         struct acpi_battery *battery;
1410         int result = 0, cnt;
1411         int old_ac_present = -1;
1412         int old_battery_present = -1;
1413         int new_ac_present = -1;
1414         int new_battery_present = -1;
1415         int id_min = 0, id_max = MAX_SBS_BAT - 1;
1416         char dir_name[32];
1417         int do_battery_init = 0, do_ac_init = 0;
1418         int old_remaining_capacity = 0;
1419         int update_battery = 1;
1420         int up_tm = update_time;
1421
1422         if (sbs_zombie(sbs)) {
1423                 goto end;
1424         }
1425
1426         if (id >= 0) {
1427                 id_min = id_max = id;
1428         }
1429
1430         if (data_type == DATA_TYPE_COMMON && up_tm > 0) {
1431                 cnt = up_tm / (up_tm > UPDATE_DELAY ? UPDATE_DELAY : up_tm);
1432                 if (sbs->run_cnt % cnt != 0) {
1433                         update_battery = 0;
1434                 }
1435         }
1436
1437         sbs->run_cnt++;
1438
1439         old_ac_present = sbs->ac.ac_present;
1440
1441         result = acpi_ac_get_present(sbs);
1442         if (result) {
1443                 ACPI_EXCEPTION((AE_INFO, AE_ERROR,
1444                                 "acpi_ac_get_present() failed"));
1445         }
1446
1447         new_ac_present = sbs->ac.ac_present;
1448
1449         do_ac_init = (old_ac_present != new_ac_present);
1450         if (sbs->run_cnt == 1 && data_type == DATA_TYPE_COMMON) {
1451                 do_ac_init = 1;
1452         }
1453
1454         if (do_ac_init) {
1455                 result = acpi_sbs_generate_event(sbs->device,
1456                                                  ACPI_SBS_AC_NOTIFY_STATUS,
1457                                                  new_ac_present,
1458                                                  ACPI_AC_DIR_NAME,
1459                                                  ACPI_AC_CLASS);
1460                 if (result) {
1461                         ACPI_EXCEPTION((AE_INFO, AE_ERROR,
1462                                         "acpi_sbs_generate_event() failed"));
1463                 }
1464         }
1465
1466         if (data_type == DATA_TYPE_COMMON) {
1467                 if (!do_ac_init && !update_battery) {
1468                         goto end;
1469                 }
1470         }
1471
1472         if (data_type == DATA_TYPE_AC_STATE && !do_ac_init) {
1473                 goto end;
1474         }
1475
1476         for (id = id_min; id <= id_max; id++) {
1477                 battery = &sbs->battery[id];
1478                 if (battery->alive == 0) {
1479                         continue;
1480                 }
1481
1482                 old_remaining_capacity = battery->state.remaining_capacity;
1483
1484                 old_battery_present = battery->battery_present;
1485
1486                 result = acpi_battery_select(battery);
1487                 if (result) {
1488                         ACPI_EXCEPTION((AE_INFO, AE_ERROR,
1489                                         "acpi_battery_select() failed"));
1490                 }
1491
1492                 result = acpi_battery_get_present(battery);
1493                 if (result) {
1494                         ACPI_EXCEPTION((AE_INFO, AE_ERROR,
1495                                         "acpi_battery_get_present() failed"));
1496                 }
1497
1498                 new_battery_present = battery->battery_present;
1499
1500                 do_battery_init = ((old_battery_present != new_battery_present)
1501                                    && new_battery_present);
1502                 if (!new_battery_present)
1503                         goto event;
1504                 if (do_ac_init || do_battery_init) {
1505                         result = acpi_battery_init(battery);
1506                         if (result) {
1507                                 ACPI_EXCEPTION((AE_INFO, AE_ERROR,
1508                                                 "acpi_battery_init() "
1509                                                 "failed"));
1510                         }
1511                 }
1512                 if (sbs_zombie(sbs)) {
1513                         goto end;
1514                 }
1515
1516                 if ((data_type == DATA_TYPE_COMMON
1517                      || data_type == DATA_TYPE_INFO)
1518                     && new_battery_present) {
1519                         result = acpi_battery_get_info(battery);
1520                         if (result) {
1521                                 ACPI_EXCEPTION((AE_INFO, AE_ERROR,
1522                                                 "acpi_battery_get_info() failed"));
1523                         }
1524                 }
1525                 if (data_type == DATA_TYPE_INFO) {
1526                         continue;
1527                 }
1528                 if (sbs_zombie(sbs)) {
1529                         goto end;
1530                 }
1531
1532                 if ((data_type == DATA_TYPE_COMMON
1533                      || data_type == DATA_TYPE_STATE)
1534                     && new_battery_present) {
1535                         result = acpi_battery_get_state(battery);
1536                         if (result) {
1537                                 ACPI_EXCEPTION((AE_INFO, AE_ERROR,
1538                                                 "acpi_battery_get_state() failed"));
1539                         }
1540                 }
1541                 if (data_type == DATA_TYPE_STATE) {
1542                         goto event;
1543                 }
1544                 if (sbs_zombie(sbs)) {
1545                         goto end;
1546                 }
1547
1548                 if ((data_type == DATA_TYPE_COMMON
1549                      || data_type == DATA_TYPE_ALARM)
1550                     && new_battery_present) {
1551                         result = acpi_battery_get_alarm(battery);
1552                         if (result) {
1553                                 ACPI_EXCEPTION((AE_INFO, AE_ERROR,
1554                                                 "acpi_battery_get_alarm() "
1555                                                 "failed"));
1556                         }
1557                 }
1558                 if (data_type == DATA_TYPE_ALARM) {
1559                         continue;
1560                 }
1561                 if (sbs_zombie(sbs)) {
1562                         goto end;
1563                 }
1564
1565               event:
1566
1567                 if (old_battery_present != new_battery_present || do_ac_init ||
1568                     old_remaining_capacity !=
1569                     battery->state.remaining_capacity) {
1570                         sprintf(dir_name, ACPI_BATTERY_DIR_NAME, id);
1571                         result = acpi_sbs_generate_event(sbs->device,
1572                                                          ACPI_SBS_BATTERY_NOTIFY_STATUS,
1573                                                          new_battery_present,
1574                                                          dir_name,
1575                                                          ACPI_BATTERY_CLASS);
1576                         if (result) {
1577                                 ACPI_EXCEPTION((AE_INFO, AE_ERROR,
1578                                                 "acpi_sbs_generate_event() "
1579                                                 "failed"));
1580                         }
1581                 }
1582         }
1583
1584       end:
1585
1586         return result;
1587 }
1588
1589 static void acpi_sbs_update_time(void *data)
1590 {
1591         struct acpi_sbs *sbs = data;
1592         unsigned long delay = -1;
1593         int result;
1594         unsigned int up_tm = update_time;
1595
1596         if (sbs_mutex_lock(sbs))
1597                 return;
1598
1599         result = acpi_sbs_update_run(sbs, -1, DATA_TYPE_COMMON);
1600         if (result) {
1601                 ACPI_EXCEPTION((AE_INFO, AE_ERROR,
1602                                 "acpi_sbs_update_run() failed"));
1603         }
1604
1605         if (sbs_zombie(sbs)) {
1606                 goto end;
1607         }
1608
1609         if (!up_tm) {
1610                 if (timer_pending(&sbs->update_timer))
1611                         del_timer(&sbs->update_timer);
1612         } else {
1613                 delay = (up_tm > UPDATE_DELAY ? UPDATE_DELAY : up_tm);
1614                 delay = jiffies + HZ * delay;
1615                 if (timer_pending(&sbs->update_timer)) {
1616                         mod_timer(&sbs->update_timer, delay);
1617                 } else {
1618                         sbs->update_timer.data = (unsigned long)data;
1619                         sbs->update_timer.function = acpi_sbs_update_time_run;
1620                         sbs->update_timer.expires = delay;
1621                         add_timer(&sbs->update_timer);
1622                 }
1623         }
1624
1625       end:
1626
1627         sbs_mutex_unlock(sbs);
1628 }
1629
1630 static int acpi_sbs_add(struct acpi_device *device)
1631 {
1632         struct acpi_sbs *sbs = NULL;
1633         int result = 0, remove_result = 0;
1634         int id;
1635         acpi_status status = AE_OK;
1636         unsigned long val;
1637
1638         status =
1639             acpi_evaluate_integer(device->handle, "_EC", NULL, &val);
1640         if (ACPI_FAILURE(status)) {
1641                 ACPI_EXCEPTION((AE_INFO, AE_ERROR, "Error obtaining _EC"));
1642                 return -EIO;
1643         }
1644
1645         sbs = kzalloc(sizeof(struct acpi_sbs), GFP_KERNEL);
1646         if (!sbs) {
1647                 ACPI_EXCEPTION((AE_INFO, AE_ERROR, "kzalloc() failed"));
1648                 result = -ENOMEM;
1649                 goto end;
1650         }
1651
1652         mutex_init(&sbs->mutex);
1653
1654         sbs_mutex_lock(sbs);
1655
1656         sbs->base = 0xff & (val >> 8);
1657         sbs->device = device;
1658
1659         strcpy(acpi_device_name(device), ACPI_SBS_DEVICE_NAME);
1660         strcpy(acpi_device_class(device), ACPI_SBS_CLASS);
1661         acpi_driver_data(device) = sbs;
1662
1663         result = acpi_ac_add(sbs);
1664         if (result) {
1665                 ACPI_EXCEPTION((AE_INFO, AE_ERROR, "acpi_ac_add() failed"));
1666                 goto end;
1667         }
1668
1669         acpi_sbsm_get_info(sbs);
1670
1671         if (!sbs->sbsm_present) {
1672                 result = acpi_battery_add(sbs, 0);
1673                 if (result) {
1674                         ACPI_EXCEPTION((AE_INFO, AE_ERROR,
1675                                         "acpi_battery_add() failed"));
1676                         goto end;
1677                 }
1678         } else {
1679                 for (id = 0; id < MAX_SBS_BAT; id++) {
1680                         if ((sbs->sbsm_batteries_supported & (1 << id))) {
1681                                 result = acpi_battery_add(sbs, id);
1682                                 if (result) {
1683                                         ACPI_EXCEPTION((AE_INFO, AE_ERROR,
1684                                                         "acpi_battery_add() failed"));
1685                                         goto end;
1686                                 }
1687                         }
1688                 }
1689         }
1690
1691         init_timer(&sbs->update_timer);
1692         result = acpi_check_update_proc(sbs);
1693         if (result)
1694                 goto end;
1695
1696       end:
1697
1698         sbs_mutex_unlock(sbs);
1699
1700         if (result) {
1701                 remove_result = acpi_sbs_remove(device, 0);
1702                 if (remove_result) {
1703                         ACPI_EXCEPTION((AE_INFO, AE_ERROR,
1704                                         "acpi_sbs_remove() failed"));
1705                 }
1706         }
1707
1708         return result;
1709 }
1710
1711 static int acpi_sbs_remove(struct acpi_device *device, int type)
1712 {
1713         struct acpi_sbs *sbs;
1714         int id;
1715
1716         if (!device) {
1717                 return -EINVAL;
1718         }
1719
1720         sbs = acpi_driver_data(device);
1721         if (!sbs) {
1722                 return -EINVAL;
1723         }
1724
1725         sbs_mutex_lock(sbs);
1726
1727         sbs->zombie = 1;
1728         del_timer_sync(&sbs->update_timer);
1729         acpi_os_wait_events_complete(NULL);
1730         del_timer_sync(&sbs->update_timer);
1731
1732         for (id = 0; id < MAX_SBS_BAT; id++) {
1733                 acpi_battery_remove(sbs, id);
1734         }
1735
1736         acpi_ac_remove(sbs);
1737
1738         sbs_mutex_unlock(sbs);
1739
1740         mutex_destroy(&sbs->mutex);
1741
1742         kfree(sbs);
1743
1744         return 0;
1745 }
1746
1747 static void acpi_sbs_rmdirs(void)
1748 {
1749         if (acpi_ac_dir) {
1750                 acpi_unlock_ac_dir(acpi_ac_dir);
1751                 acpi_ac_dir = NULL;
1752         }
1753         if (acpi_battery_dir) {
1754                 acpi_unlock_battery_dir(acpi_battery_dir);
1755                 acpi_battery_dir = NULL;
1756         }
1757 }
1758
1759 static int acpi_sbs_resume(struct acpi_device *device)
1760 {
1761         struct acpi_sbs *sbs;
1762
1763         if (!device)
1764                 return -EINVAL;
1765
1766         sbs = device->driver_data;
1767
1768         sbs->run_cnt = 0;
1769
1770         return 0;
1771 }
1772
1773 static int __init acpi_sbs_init(void)
1774 {
1775         int result = 0;
1776
1777         if (acpi_disabled)
1778                 return -ENODEV;
1779
1780         if (capacity_mode != DEF_CAPACITY_UNIT
1781             && capacity_mode != MAH_CAPACITY_UNIT
1782             && capacity_mode != MWH_CAPACITY_UNIT) {
1783                 ACPI_EXCEPTION((AE_INFO, AE_ERROR,
1784                                 "invalid capacity_mode = %d", capacity_mode));
1785                 return -EINVAL;
1786         }
1787
1788         acpi_ac_dir = acpi_lock_ac_dir();
1789         if (!acpi_ac_dir) {
1790                 ACPI_EXCEPTION((AE_INFO, AE_ERROR,
1791                                 "acpi_lock_ac_dir() failed"));
1792                 return -ENODEV;
1793         }
1794
1795         acpi_battery_dir = acpi_lock_battery_dir();
1796         if (!acpi_battery_dir) {
1797                 ACPI_EXCEPTION((AE_INFO, AE_ERROR,
1798                                 "acpi_lock_battery_dir() failed"));
1799                 acpi_sbs_rmdirs();
1800                 return -ENODEV;
1801         }
1802
1803         result = acpi_bus_register_driver(&acpi_sbs_driver);
1804         if (result < 0) {
1805                 ACPI_EXCEPTION((AE_INFO, AE_ERROR,
1806                                 "acpi_bus_register_driver() failed"));
1807                 acpi_sbs_rmdirs();
1808                 return -ENODEV;
1809         }
1810
1811         return 0;
1812 }
1813
1814 static void __exit acpi_sbs_exit(void)
1815 {
1816         acpi_bus_unregister_driver(&acpi_sbs_driver);
1817
1818         acpi_sbs_rmdirs();
1819
1820         return;
1821 }
1822
1823 module_init(acpi_sbs_init);
1824 module_exit(acpi_sbs_exit);