SAFE public projects git trees. - safe/jmp/linux-2.6/blob - 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_battery_get_present(struct acpi_battery *battery)
 431 {
 432         s16 state;
 433         int result = 0;
 434         int is_present = 0;
 435
 436         result = acpi_sbs_read_word(battery->sbs,
 437                                     ACPI_SBSM_SMBUS_ADDR, 0x01, &state);
 438         if (result) {
 439                 ACPI_EXCEPTION((AE_INFO, AE_ERROR,
 440                                 "acpi_sbs_read_word() failed"));
 441         }
 442         if (!result) {
 443                 is_present = (state & 0x000f) & (1 << battery->id);
 444         }
 445         battery->battery_present = is_present;
 446
 447         return result;
 448 }
 449
 450 static int acpi_battery_select(struct acpi_battery *battery)
 451 {
 452         struct acpi_sbs *sbs = battery->sbs;
 453         int result = 0;
 454         s16 state;
 455         int foo;
 456
 457         if (sbs->sbsm_present) {
 458
 459                 /* Take special care not to knobble other nibbles of
 460                  * state (aka selector_state), since
 461                  * it causes charging to halt on SBSELs */
 462
 463                 result =
 464                     acpi_sbs_read_word(sbs, ACPI_SBSM_SMBUS_ADDR, 0x01, &state);
 465                 if (result) {
 466                         ACPI_EXCEPTION((AE_INFO, AE_ERROR,
 467                                         "acpi_sbs_read_word() failed"));
 468                         goto end;
 469                 }
 470
 471                 foo = (state & 0x0fff) | (1 << (battery->id + 12));
 472                 result =
 473                     acpi_sbs_write_word(sbs, ACPI_SBSM_SMBUS_ADDR, 0x01, foo);
 474                 if (result) {
 475                         ACPI_EXCEPTION((AE_INFO, AE_ERROR,
 476                                         "acpi_sbs_write_word() failed"));
 477                         goto end;
 478                 }
 479         }
 480
 481       end:
 482         return result;
 483 }
 484
 485 static int acpi_sbsm_get_info(struct acpi_sbs *sbs)
 486 {
 487         int result = 0;
 488         s16 battery_system_info;
 489
 490         result = acpi_sbs_read_word(sbs, ACPI_SBSM_SMBUS_ADDR, 0x04,
 491                                     &battery_system_info);
 492         if (result) {
 493                 ACPI_EXCEPTION((AE_INFO, AE_ERROR,
 494                                 "acpi_sbs_read_word() failed"));
 495                 goto end;
 496         }
 497         sbs->sbsm_present = 1;
 498         sbs->sbsm_batteries_supported = battery_system_info & 0x000f;
 499
 500       end:
 501
 502         return result;
 503 }
 504
 505 static int acpi_battery_get_info(struct acpi_battery *battery)
 506 {
 507         struct acpi_sbs *sbs = battery->sbs;
 508         int result = 0;
 509         s16 battery_mode;
 510         s16 specification_info;
 511
 512         result = acpi_sbs_read_word(sbs, ACPI_SB_SMBUS_ADDR, 0x03,
 513                                     &battery_mode);
 514         if (result) {
 515                 ACPI_EXCEPTION((AE_INFO, AE_ERROR,
 516                                 "acpi_sbs_read_word() failed"));
 517                 goto end;
 518         }
 519         battery->info.capacity_mode = (battery_mode & 0x8000) >> 15;
 520
 521         result = acpi_sbs_read_word(sbs, ACPI_SB_SMBUS_ADDR, 0x10,
 522                                     &battery->info.full_charge_capacity);
 523         if (result) {
 524                 ACPI_EXCEPTION((AE_INFO, AE_ERROR,
 525                                 "acpi_sbs_read_word() failed"));
 526                 goto end;
 527         }
 528
 529         result = acpi_sbs_read_word(sbs, ACPI_SB_SMBUS_ADDR, 0x18,
 530                                     &battery->info.design_capacity);
 531
 532         if (result) {
 533                 ACPI_EXCEPTION((AE_INFO, AE_ERROR,
 534                                 "acpi_sbs_read_word() failed"));
 535                 goto end;
 536         }
 537
 538         result = acpi_sbs_read_word(sbs, ACPI_SB_SMBUS_ADDR, 0x19,
 539                                     &battery->info.design_voltage);
 540         if (result) {
 541                 ACPI_EXCEPTION((AE_INFO, AE_ERROR,
 542                                 "acpi_sbs_read_word() failed"));
 543                 goto end;
 544         }
 545
 546         result = acpi_sbs_read_word(sbs, ACPI_SB_SMBUS_ADDR, 0x1a,
 547                                     &specification_info);
 548         if (result) {
 549                 ACPI_EXCEPTION((AE_INFO, AE_ERROR,
 550                                 "acpi_sbs_read_word() failed"));
 551                 goto end;
 552         }
 553
 554         switch ((specification_info & 0x0f00) >> 8) {
 555         case 1:
 556                 battery->info.vscale = 10;
 557                 break;
 558         case 2:
 559                 battery->info.vscale = 100;
 560                 break;
 561         case 3:
 562                 battery->info.vscale = 1000;
 563                 break;
 564         default:
 565                 battery->info.vscale = 1;
 566         }
 567
 568         switch ((specification_info & 0xf000) >> 12) {
 569         case 1:
 570                 battery->info.ipscale = 10;
 571                 break;
 572         case 2:
 573                 battery->info.ipscale = 100;
 574                 break;
 575         case 3:
 576                 battery->info.ipscale = 1000;
 577                 break;
 578         default:
 579                 battery->info.ipscale = 1;
 580         }
 581
 582         result = acpi_sbs_read_word(sbs, ACPI_SB_SMBUS_ADDR, 0x1c,
 583                                     &battery->info.serial_number);
 584         if (result) {
 585                 ACPI_EXCEPTION((AE_INFO, AE_ERROR,
 586                                 "acpi_sbs_read_word() failed"));
 587                 goto end;
 588         }
 589
 590         result = acpi_sbs_read_str(sbs, ACPI_SB_SMBUS_ADDR, 0x20,
 591                                    battery->info.manufacturer_name);
 592         if (result) {
 593                 ACPI_EXCEPTION((AE_INFO, AE_ERROR,
 594                                 "acpi_sbs_read_str() failed"));
 595                 goto end;
 596         }
 597
 598         result = acpi_sbs_read_str(sbs, ACPI_SB_SMBUS_ADDR, 0x21,
 599                                    battery->info.device_name);
 600         if (result) {
 601                 ACPI_EXCEPTION((AE_INFO, AE_ERROR,
 602                                 "acpi_sbs_read_str() failed"));
 603                 goto end;
 604         }
 605
 606         result = acpi_sbs_read_str(sbs, ACPI_SB_SMBUS_ADDR, 0x22,
 607                                    battery->info.device_chemistry);
 608         if (result) {
 609                 ACPI_EXCEPTION((AE_INFO, AE_ERROR,
 610                                 "acpi_sbs_read_str() failed"));
 611                 goto end;
 612         }
 613
 614       end:
 615         return result;
 616 }
 617
 618 static int acpi_battery_get_state(struct acpi_battery *battery)
 619 {
 620         struct acpi_sbs *sbs = battery->sbs;
 621         int result = 0;
 622
 623         result = acpi_sbs_read_word(sbs, ACPI_SB_SMBUS_ADDR, 0x09,
 624                                     &battery->state.voltage);
 625         if (result) {
 626                 ACPI_EXCEPTION((AE_INFO, AE_ERROR,
 627                                 "acpi_sbs_read_word() failed"));
 628                 goto end;
 629         }
 630
 631         result = acpi_sbs_read_word(sbs, ACPI_SB_SMBUS_ADDR, 0x0a,
 632                                     &battery->state.amperage);
 633         if (result) {
 634                 ACPI_EXCEPTION((AE_INFO, AE_ERROR,
 635                                 "acpi_sbs_read_word() failed"));
 636                 goto end;
 637         }
 638
 639         result = acpi_sbs_read_word(sbs, ACPI_SB_SMBUS_ADDR, 0x0f,
 640                                     &battery->state.remaining_capacity);
 641         if (result) {
 642                 ACPI_EXCEPTION((AE_INFO, AE_ERROR,
 643                                 "acpi_sbs_read_word() failed"));
 644                 goto end;
 645         }
 646
 647         result = acpi_sbs_read_word(sbs, ACPI_SB_SMBUS_ADDR, 0x16,
 648                                     &battery->state.battery_state);
 649         if (result) {
 650                 ACPI_EXCEPTION((AE_INFO, AE_ERROR,
 651                                 "acpi_sbs_read_word() failed"));
 652                 goto end;
 653         }
 654
 655       end:
 656         return result;
 657 }
 658
 659 static int acpi_battery_get_alarm(struct acpi_battery *battery)
 660 {
 661         struct acpi_sbs *sbs = battery->sbs;
 662         int result = 0;
 663
 664         result = acpi_sbs_read_word(sbs, ACPI_SB_SMBUS_ADDR, 0x01,
 665                                     &battery->alarm.remaining_capacity);
 666         if (result) {
 667                 ACPI_EXCEPTION((AE_INFO, AE_ERROR,
 668                                 "acpi_sbs_read_word() failed"));
 669                 goto end;
 670         }
 671
 672       end:
 673
 674         return result;
 675 }
 676
 677 static int acpi_battery_set_alarm(struct acpi_battery *battery,
 678                                   unsigned long alarm)
 679 {
 680         struct acpi_sbs *sbs = battery->sbs;
 681         int result = 0;
 682         s16 battery_mode;
 683         int foo;
 684
 685         result = acpi_battery_select(battery);
 686         if (result) {
 687                 ACPI_EXCEPTION((AE_INFO, AE_ERROR,
 688                                 "acpi_battery_select() failed"));
 689                 goto end;
 690         }
 691
 692         /* If necessary, enable the alarm */
 693
 694         if (alarm > 0) {
 695                 result =
 696                     acpi_sbs_read_word(sbs, ACPI_SB_SMBUS_ADDR, 0x03,
 697                                        &battery_mode);
 698                 if (result) {
 699                         ACPI_EXCEPTION((AE_INFO, AE_ERROR,
 700                                         "acpi_sbs_read_word() failed"));
 701                         goto end;
 702                 }
 703
 704                 result =
 705                     acpi_sbs_write_word(sbs, ACPI_SB_SMBUS_ADDR, 0x01,
 706                                         battery_mode & 0xbfff);
 707                 if (result) {
 708                         ACPI_EXCEPTION((AE_INFO, AE_ERROR,
 709                                         "acpi_sbs_write_word() failed"));
 710                         goto end;
 711                 }
 712         }
 713
 714         foo = alarm / (battery->info.capacity_mode ? 10 : 1);
 715         result = acpi_sbs_write_word(sbs, ACPI_SB_SMBUS_ADDR, 0x01, foo);
 716         if (result) {
 717                 ACPI_EXCEPTION((AE_INFO, AE_ERROR,
 718                                 "acpi_sbs_write_word() failed"));
 719                 goto end;
 720         }
 721
 722       end:
 723
 724         return result;
 725 }
 726
 727 static int acpi_battery_set_mode(struct acpi_battery *battery)
 728 {
 729         struct acpi_sbs *sbs = battery->sbs;
 730         int result = 0;
 731         s16 battery_mode;
 732
 733         if (capacity_mode == DEF_CAPACITY_UNIT) {
 734                 goto end;
 735         }
 736
 737         result = acpi_sbs_read_word(sbs,
 738                                     ACPI_SB_SMBUS_ADDR, 0x03, &battery_mode);
 739         if (result) {
 740                 ACPI_EXCEPTION((AE_INFO, AE_ERROR,
 741                                 "acpi_sbs_read_word() failed"));
 742                 goto end;
 743         }
 744
 745         if (capacity_mode == MAH_CAPACITY_UNIT) {
 746                 battery_mode &= 0x7fff;
 747         } else {
 748                 battery_mode |= 0x8000;
 749         }
 750         result = acpi_sbs_write_word(sbs,
 751                                      ACPI_SB_SMBUS_ADDR, 0x03, battery_mode);
 752         if (result) {
 753                 ACPI_EXCEPTION((AE_INFO, AE_ERROR,
 754                                 "acpi_sbs_write_word() failed"));
 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       end:
 767         return result;
 768 }
 769
 770 static int acpi_battery_init(struct acpi_battery *battery)
 771 {
 772         int result = 0;
 773
 774         result = acpi_battery_select(battery);
 775         if (result) {
 776                 ACPI_EXCEPTION((AE_INFO, AE_ERROR,
 777                                 "acpi_battery_select() failed"));
 778                 goto end;
 779         }
 780
 781         result = acpi_battery_set_mode(battery);
 782         if (result) {
 783                 ACPI_EXCEPTION((AE_INFO, AE_ERROR,
 784                                 "acpi_battery_set_mode() failed"));
 785                 goto end;
 786         }
 787
 788         result = acpi_battery_get_info(battery);
 789         if (result) {
 790                 ACPI_EXCEPTION((AE_INFO, AE_ERROR,
 791                                 "acpi_battery_get_info() failed"));
 792                 goto end;
 793         }
 794
 795         result = acpi_battery_get_state(battery);
 796         if (result) {
 797                 ACPI_EXCEPTION((AE_INFO, AE_ERROR,
 798                                 "acpi_battery_get_state() failed"));
 799                 goto end;
 800         }
 801
 802         result = acpi_battery_get_alarm(battery);
 803         if (result) {
 804                 ACPI_EXCEPTION((AE_INFO, AE_ERROR,
 805                                 "acpi_battery_get_alarm() failed"));
 806                 goto end;
 807         }
 808
 809       end:
 810         return result;
 811 }
 812
 813 static int acpi_ac_get_present(struct acpi_sbs *sbs)
 814 {
 815         int result = 0;
 816         s16 charger_status;
 817
 818         result = acpi_sbs_read_word(sbs, ACPI_SBC_SMBUS_ADDR, 0x13,
 819                                     &charger_status);
 820
 821         if (result) {
 822                 ACPI_EXCEPTION((AE_INFO, AE_ERROR,
 823                                 "acpi_sbs_read_word() failed"));
 824                 goto end;
 825         }
 826
 827         sbs->ac.ac_present = (charger_status & 0x8000) >> 15;
 828
 829       end:
 830
 831         return result;
 832 }
 833
 834 /* --------------------------------------------------------------------------
 835                               FS Interface (/proc/acpi)
 836    -------------------------------------------------------------------------- */
 837
 838 /* Generic Routines */
 839
 840 static int
 841 acpi_sbs_generic_add_fs(struct proc_dir_entry **dir,
 842                         struct proc_dir_entry *parent_dir,
 843                         char *dir_name,
 844                         struct file_operations *info_fops,
 845                         struct file_operations *state_fops,
 846                         struct file_operations *alarm_fops, void *data)
 847 {
 848         struct proc_dir_entry *entry = NULL;
 849
 850         if (!*dir) {
 851                 *dir = proc_mkdir(dir_name, parent_dir);
 852                 if (!*dir) {
 853                         ACPI_EXCEPTION((AE_INFO, AE_ERROR,
 854                                         "proc_mkdir() failed"));
 855                         return -ENODEV;
 856                 }
 857                 (*dir)->owner = THIS_MODULE;
 858         }
 859
 860         /* 'info' [R] */
 861         if (info_fops) {
 862                 entry = create_proc_entry(ACPI_SBS_FILE_INFO, S_IRUGO, *dir);
 863                 if (!entry) {
 864                         ACPI_EXCEPTION((AE_INFO, AE_ERROR,
 865                                         "create_proc_entry() failed"));
 866                 } else {
 867                         entry->proc_fops = info_fops;
 868                         entry->data = data;
 869                         entry->owner = THIS_MODULE;
 870                 }
 871         }
 872
 873         /* 'state' [R] */
 874         if (state_fops) {
 875                 entry = create_proc_entry(ACPI_SBS_FILE_STATE, S_IRUGO, *dir);
 876                 if (!entry) {
 877                         ACPI_EXCEPTION((AE_INFO, AE_ERROR,
 878                                         "create_proc_entry() failed"));
 879                 } else {
 880                         entry->proc_fops = state_fops;
 881                         entry->data = data;
 882                         entry->owner = THIS_MODULE;
 883                 }
 884         }
 885
 886         /* 'alarm' [R/W] */
 887         if (alarm_fops) {
 888                 entry = create_proc_entry(ACPI_SBS_FILE_ALARM, S_IRUGO, *dir);
 889                 if (!entry) {
 890                         ACPI_EXCEPTION((AE_INFO, AE_ERROR,
 891                                         "create_proc_entry() failed"));
 892                 } else {
 893                         entry->proc_fops = alarm_fops;
 894                         entry->data = data;
 895                         entry->owner = THIS_MODULE;
 896                 }
 897         }
 898
 899         return 0;
 900 }
 901
 902 static void
 903 acpi_sbs_generic_remove_fs(struct proc_dir_entry **dir,
 904                            struct proc_dir_entry *parent_dir)
 905 {
 906
 907         if (*dir) {
 908                 remove_proc_entry(ACPI_SBS_FILE_INFO, *dir);
 909                 remove_proc_entry(ACPI_SBS_FILE_STATE, *dir);
 910                 remove_proc_entry(ACPI_SBS_FILE_ALARM, *dir);
 911                 remove_proc_entry((*dir)->name, parent_dir);
 912                 *dir = NULL;
 913         }
 914
 915 }
 916
 917 /* Smart Battery Interface */
 918
 919 static struct proc_dir_entry *acpi_battery_dir = NULL;
 920
 921 static int acpi_battery_read_info(struct seq_file *seq, void *offset)
 922 {
 923         struct acpi_battery *battery = seq->private;
 924         struct acpi_sbs *sbs = battery->sbs;
 925         int cscale;
 926         int result = 0;
 927
 928         if (sbs_mutex_lock(sbs)) {
 929                 return -ENODEV;
 930         }
 931
 932         result = acpi_check_update_proc(sbs);
 933         if (result)
 934                 goto end;
 935
 936         if (update_time == 0) {
 937                 result = acpi_sbs_update_run(sbs, battery->id, DATA_TYPE_INFO);
 938                 if (result) {
 939                         ACPI_EXCEPTION((AE_INFO, AE_ERROR,
 940                                         "acpi_sbs_update_run() failed"));
 941                 }
 942         }
 943
 944         if (battery->battery_present) {
 945                 seq_printf(seq, "present:                 yes\n");
 946         } else {
 947                 seq_printf(seq, "present:                 no\n");
 948                 goto end;
 949         }
 950
 951         if (battery->info.capacity_mode) {
 952                 cscale = battery->info.vscale * battery->info.ipscale;
 953         } else {
 954                 cscale = battery->info.ipscale;
 955         }
 956         seq_printf(seq, "design capacity:         %i%s\n",
 957                    battery->info.design_capacity * cscale,
 958                    battery->info.capacity_mode ? "0 mWh" : " mAh");
 959
 960         seq_printf(seq, "last full capacity:      %i%s\n",
 961                    battery->info.full_charge_capacity * cscale,
 962                    battery->info.capacity_mode ? "0 mWh" : " mAh");
 963
 964         seq_printf(seq, "battery technology:      rechargeable\n");
 965
 966         seq_printf(seq, "design voltage:          %i mV\n",
 967                    battery->info.design_voltage * battery->info.vscale);
 968
 969         seq_printf(seq, "design capacity warning: unknown\n");
 970         seq_printf(seq, "design capacity low:     unknown\n");
 971         seq_printf(seq, "capacity granularity 1:  unknown\n");
 972         seq_printf(seq, "capacity granularity 2:  unknown\n");
 973
 974         seq_printf(seq, "model number:            %s\n",
 975                    battery->info.device_name);
 976
 977         seq_printf(seq, "serial number:           %i\n",
 978                    battery->info.serial_number);
 979
 980         seq_printf(seq, "battery type:            %s\n",
 981                    battery->info.device_chemistry);
 982
 983         seq_printf(seq, "OEM info:                %s\n",
 984                    battery->info.manufacturer_name);
 985
 986       end:
 987
 988         sbs_mutex_unlock(sbs);
 989
 990         return result;
 991 }
 992
 993 static int acpi_battery_info_open_fs(struct inode *inode, struct file *file)
 994 {
 995         return single_open(file, acpi_battery_read_info, PDE(inode)->data);
 996 }
 997
 998 static int acpi_battery_read_state(struct seq_file *seq, void *offset)
 999 {
1000         struct acpi_battery *battery = seq->private;
1001         struct acpi_sbs *sbs = battery->sbs;
1002         int result = 0;
1003         int cscale;
1004         int foo;
1005
1006         if (sbs_mutex_lock(sbs)) {
1007                 return -ENODEV;
1008         }
1009
1010         result = acpi_check_update_proc(sbs);
1011         if (result)
1012                 goto end;
1013
1014         if (update_time == 0) {
1015                 result = acpi_sbs_update_run(sbs, battery->id, DATA_TYPE_STATE);
1016                 if (result) {
1017                         ACPI_EXCEPTION((AE_INFO, AE_ERROR,
1018                                         "acpi_sbs_update_run() failed"));
1019                 }
1020         }
1021
1022         if (battery->battery_present) {
1023                 seq_printf(seq, "present:                 yes\n");
1024         } else {
1025                 seq_printf(seq, "present:                 no\n");
1026                 goto end;
1027         }
1028
1029         if (battery->info.capacity_mode) {
1030                 cscale = battery->info.vscale * battery->info.ipscale;
1031         } else {
1032                 cscale = battery->info.ipscale;
1033         }
1034
1035         if (battery->state.battery_state & 0x0010) {
1036                 seq_printf(seq, "capacity state:          critical\n");
1037         } else {
1038                 seq_printf(seq, "capacity state:          ok\n");
1039         }
1040
1041         foo = (s16) battery->state.amperage * battery->info.ipscale;
1042         if (battery->info.capacity_mode) {
1043                 foo = foo * battery->info.design_voltage / 1000;
1044         }
1045         if (battery->state.amperage < 0) {
1046                 seq_printf(seq, "charging state:          discharging\n");
1047                 seq_printf(seq, "present rate:            %d %s\n",
1048                            -foo, battery->info.capacity_mode ? "mW" : "mA");
1049         } else if (battery->state.amperage > 0) {
1050                 seq_printf(seq, "charging state:          charging\n");
1051                 seq_printf(seq, "present rate:            %d %s\n",
1052                            foo, battery->info.capacity_mode ? "mW" : "mA");
1053         } else {
1054                 seq_printf(seq, "charging state:          charged\n");
1055                 seq_printf(seq, "present rate:            0 %s\n",
1056                            battery->info.capacity_mode ? "mW" : "mA");
1057         }
1058
1059         seq_printf(seq, "remaining capacity:      %i%s\n",
1060                    battery->state.remaining_capacity * cscale,
1061                    battery->info.capacity_mode ? "0 mWh" : " mAh");
1062
1063         seq_printf(seq, "present voltage:         %i mV\n",
1064                    battery->state.voltage * battery->info.vscale);
1065
1066       end:
1067
1068         sbs_mutex_unlock(sbs);
1069
1070         return result;
1071 }
1072
1073 static int acpi_battery_state_open_fs(struct inode *inode, struct file *file)
1074 {
1075         return single_open(file, acpi_battery_read_state, PDE(inode)->data);
1076 }
1077
1078 static int acpi_battery_read_alarm(struct seq_file *seq, void *offset)
1079 {
1080         struct acpi_battery *battery = seq->private;
1081         struct acpi_sbs *sbs = battery->sbs;
1082         int result = 0;
1083         int cscale;
1084
1085         if (sbs_mutex_lock(sbs)) {
1086                 return -ENODEV;
1087         }
1088
1089         result = acpi_check_update_proc(sbs);
1090         if (result)
1091                 goto end;
1092
1093         if (update_time == 0) {
1094                 result = acpi_sbs_update_run(sbs, battery->id, DATA_TYPE_ALARM);
1095                 if (result) {
1096                         ACPI_EXCEPTION((AE_INFO, AE_ERROR,
1097                                         "acpi_sbs_update_run() failed"));
1098                 }
1099         }
1100
1101         if (!battery->battery_present) {
1102                 seq_printf(seq, "present:                 no\n");
1103                 goto end;
1104         }
1105
1106         if (battery->info.capacity_mode) {
1107                 cscale = battery->info.vscale * battery->info.ipscale;
1108         } else {
1109                 cscale = battery->info.ipscale;
1110         }
1111
1112         seq_printf(seq, "alarm:                   ");
1113         if (battery->alarm.remaining_capacity) {
1114                 seq_printf(seq, "%i%s\n",
1115                            battery->alarm.remaining_capacity * cscale,
1116                            battery->info.capacity_mode ? "0 mWh" : " mAh");
1117         } else {
1118                 seq_printf(seq, "disabled\n");
1119         }
1120
1121       end:
1122
1123         sbs_mutex_unlock(sbs);
1124
1125         return result;
1126 }
1127
1128 static ssize_t
1129 acpi_battery_write_alarm(struct file *file, const char __user * buffer,
1130                          size_t count, loff_t * ppos)
1131 {
1132         struct seq_file *seq = file->private_data;
1133         struct acpi_battery *battery = seq->private;
1134         struct acpi_sbs *sbs = battery->sbs;
1135         char alarm_string[12] = { '\0' };
1136         int result, old_alarm, new_alarm;
1137
1138         if (sbs_mutex_lock(sbs)) {
1139                 return -ENODEV;
1140         }
1141
1142         result = acpi_check_update_proc(sbs);
1143         if (result)
1144                 goto end;
1145
1146         if (!battery->battery_present) {
1147                 result = -ENODEV;
1148                 goto end;
1149         }
1150
1151         if (count > sizeof(alarm_string) - 1) {
1152                 result = -EINVAL;
1153                 goto end;
1154         }
1155
1156         if (copy_from_user(alarm_string, buffer, count)) {
1157                 result = -EFAULT;
1158                 goto end;
1159         }
1160
1161         alarm_string[count] = 0;
1162
1163         old_alarm = battery->alarm.remaining_capacity;
1164         new_alarm = simple_strtoul(alarm_string, NULL, 0);
1165
1166         result = acpi_battery_set_alarm(battery, new_alarm);
1167         if (result) {
1168                 ACPI_EXCEPTION((AE_INFO, AE_ERROR,
1169                                 "acpi_battery_set_alarm() failed"));
1170                 acpi_battery_set_alarm(battery, old_alarm);
1171                 goto end;
1172         }
1173         result = acpi_battery_get_alarm(battery);
1174         if (result) {
1175                 ACPI_EXCEPTION((AE_INFO, AE_ERROR,
1176                                 "acpi_battery_get_alarm() failed"));
1177                 acpi_battery_set_alarm(battery, old_alarm);
1178                 goto end;
1179         }
1180
1181       end:
1182         sbs_mutex_unlock(sbs);
1183
1184         if (result) {
1185                 return result;
1186         } else {
1187                 return count;
1188         }
1189 }
1190
1191 static int acpi_battery_alarm_open_fs(struct inode *inode, struct file *file)
1192 {
1193         return single_open(file, acpi_battery_read_alarm, PDE(inode)->data);
1194 }
1195
1196 static struct file_operations acpi_battery_info_fops = {
1197         .open = acpi_battery_info_open_fs,
1198         .read = seq_read,
1199         .llseek = seq_lseek,
1200         .release = single_release,
1201         .owner = THIS_MODULE,
1202 };
1203
1204 static struct file_operations acpi_battery_state_fops = {
1205         .open = acpi_battery_state_open_fs,
1206         .read = seq_read,
1207         .llseek = seq_lseek,
1208         .release = single_release,
1209         .owner = THIS_MODULE,
1210 };
1211
1212 static struct file_operations acpi_battery_alarm_fops = {
1213         .open = acpi_battery_alarm_open_fs,
1214         .read = seq_read,
1215         .write = acpi_battery_write_alarm,
1216         .llseek = seq_lseek,
1217         .release = single_release,
1218         .owner = THIS_MODULE,
1219 };
1220
1221 /* Legacy AC Adapter Interface */
1222
1223 static struct proc_dir_entry *acpi_ac_dir = NULL;
1224
1225 static int acpi_ac_read_state(struct seq_file *seq, void *offset)
1226 {
1227         struct acpi_sbs *sbs = seq->private;
1228         int result;
1229
1230         if (sbs_mutex_lock(sbs)) {
1231                 return -ENODEV;
1232         }
1233
1234         if (update_time == 0) {
1235                 result = acpi_sbs_update_run(sbs, -1, DATA_TYPE_AC_STATE);
1236                 if (result) {
1237                         ACPI_EXCEPTION((AE_INFO, AE_ERROR,
1238                                         "acpi_sbs_update_run() failed"));
1239                 }
1240         }
1241
1242         seq_printf(seq, "state:                   %s\n",
1243                    sbs->ac.ac_present ? "on-line" : "off-line");
1244
1245         sbs_mutex_unlock(sbs);
1246
1247         return 0;
1248 }
1249
1250 static int acpi_ac_state_open_fs(struct inode *inode, struct file *file)
1251 {
1252         return single_open(file, acpi_ac_read_state, PDE(inode)->data);
1253 }
1254
1255 static struct file_operations acpi_ac_state_fops = {
1256         .open = acpi_ac_state_open_fs,
1257         .read = seq_read,
1258         .llseek = seq_lseek,
1259         .release = single_release,
1260         .owner = THIS_MODULE,
1261 };
1262
1263 /* --------------------------------------------------------------------------
1264                                  Driver Interface
1265    -------------------------------------------------------------------------- */
1266
1267 /* Smart Battery */
1268
1269 static int acpi_battery_add(struct acpi_sbs *sbs, int id)
1270 {
1271         int is_present;
1272         int result;
1273         char dir_name[32];
1274         struct acpi_battery *battery;
1275
1276         battery = &sbs->battery[id];
1277
1278         battery->alive = 0;
1279
1280         battery->init_state = 0;
1281         battery->id = id;
1282         battery->sbs = sbs;
1283
1284         result = acpi_battery_select(battery);
1285         if (result) {
1286                 ACPI_EXCEPTION((AE_INFO, AE_ERROR,
1287                                 "acpi_battery_select() failed"));
1288                 goto end;
1289         }
1290
1291         result = acpi_battery_get_present(battery);
1292         if (result) {
1293                 ACPI_EXCEPTION((AE_INFO, AE_ERROR,
1294                                 "acpi_battery_get_present() failed"));
1295                 goto end;
1296         }
1297
1298         is_present = battery->battery_present;
1299
1300         if (is_present) {
1301                 result = acpi_battery_init(battery);
1302                 if (result) {
1303                         ACPI_EXCEPTION((AE_INFO, AE_ERROR,
1304                                         "acpi_battery_init() failed"));
1305                         goto end;
1306                 }
1307                 battery->init_state = 1;
1308         }
1309
1310         sprintf(dir_name, ACPI_BATTERY_DIR_NAME, id);
1311
1312         result = acpi_sbs_generic_add_fs(&battery->battery_entry,
1313                                          acpi_battery_dir,
1314                                          dir_name,
1315                                          &acpi_battery_info_fops,
1316                                          &acpi_battery_state_fops,
1317                                          &acpi_battery_alarm_fops, battery);
1318         if (result) {
1319                 ACPI_EXCEPTION((AE_INFO, AE_ERROR,
1320                                 "acpi_sbs_generic_add_fs() failed"));
1321                 goto end;
1322         }
1323         battery->alive = 1;
1324
1325         printk(KERN_INFO PREFIX "%s [%s]: Battery Slot [%s] (battery %s)\n",
1326                ACPI_SBS_DEVICE_NAME, acpi_device_bid(sbs->device), dir_name,
1327                sbs->battery->battery_present ? "present" : "absent");
1328
1329       end:
1330         return result;
1331 }
1332
1333 static void acpi_battery_remove(struct acpi_sbs *sbs, int id)
1334 {
1335
1336         if (sbs->battery[id].battery_entry) {
1337                 acpi_sbs_generic_remove_fs(&(sbs->battery[id].battery_entry),
1338                                            acpi_battery_dir);
1339         }
1340 }
1341
1342 static int acpi_ac_add(struct acpi_sbs *sbs)
1343 {
1344         int result;
1345
1346         result = acpi_ac_get_present(sbs);
1347         if (result) {
1348                 ACPI_EXCEPTION((AE_INFO, AE_ERROR,
1349                                 "acpi_ac_get_present() failed"));
1350                 goto end;
1351         }
1352
1353         result = acpi_sbs_generic_add_fs(&sbs->ac_entry,
1354                                          acpi_ac_dir,
1355                                          ACPI_AC_DIR_NAME,
1356                                          NULL, &acpi_ac_state_fops, NULL, sbs);
1357         if (result) {
1358                 ACPI_EXCEPTION((AE_INFO, AE_ERROR,
1359                                 "acpi_sbs_generic_add_fs() failed"));
1360                 goto end;
1361         }
1362
1363         printk(KERN_INFO PREFIX "%s [%s]: AC Adapter [%s] (%s)\n",
1364                ACPI_SBS_DEVICE_NAME, acpi_device_bid(sbs->device),
1365                ACPI_AC_DIR_NAME, sbs->ac.ac_present ? "on-line" : "off-line");
1366
1367       end:
1368
1369         return result;
1370 }
1371
1372 static void acpi_ac_remove(struct acpi_sbs *sbs)
1373 {
1374
1375         if (sbs->ac_entry) {
1376                 acpi_sbs_generic_remove_fs(&sbs->ac_entry, acpi_ac_dir);
1377         }
1378 }
1379
1380 static void acpi_sbs_update_time_run(unsigned long data)
1381 {
1382         acpi_os_execute(OSL_GPE_HANDLER, acpi_sbs_update_time, (void *)data);
1383 }
1384
1385 static int acpi_sbs_update_run(struct acpi_sbs *sbs, int id, int data_type)
1386 {
1387         struct acpi_battery *battery;
1388         int result = 0, cnt;
1389         int old_ac_present = -1;
1390         int old_battery_present = -1;
1391         int new_ac_present = -1;
1392         int new_battery_present = -1;
1393         int id_min = 0, id_max = MAX_SBS_BAT - 1;
1394         char dir_name[32];
1395         int do_battery_init = 0, do_ac_init = 0;
1396         int old_remaining_capacity = 0;
1397         int update_battery = 1;
1398         int up_tm = update_time;
1399
1400         if (sbs_zombie(sbs)) {
1401                 goto end;
1402         }
1403
1404         if (id >= 0) {
1405                 id_min = id_max = id;
1406         }
1407
1408         if (data_type == DATA_TYPE_COMMON && up_tm > 0) {
1409                 cnt = up_tm / (up_tm > UPDATE_DELAY ? UPDATE_DELAY : up_tm);
1410                 if (sbs->run_cnt % cnt != 0) {
1411                         update_battery = 0;
1412                 }
1413         }
1414
1415         sbs->run_cnt++;
1416
1417         old_ac_present = sbs->ac.ac_present;
1418
1419         result = acpi_ac_get_present(sbs);
1420         if (result) {
1421                 ACPI_EXCEPTION((AE_INFO, AE_ERROR,
1422                                 "acpi_ac_get_present() failed"));
1423         }
1424
1425         new_ac_present = sbs->ac.ac_present;
1426
1427         do_ac_init = (old_ac_present != new_ac_present);
1428         if (sbs->run_cnt == 1 && data_type == DATA_TYPE_COMMON) {
1429                 do_ac_init = 1;
1430         }
1431
1432         if (do_ac_init) {
1433                 result = acpi_bus_generate_proc_event4(ACPI_AC_CLASS,
1434                                                  ACPI_AC_DIR_NAME,
1435                                                  ACPI_SBS_AC_NOTIFY_STATUS,
1436                                                  new_ac_present);
1437                 if (result) {
1438                         ACPI_EXCEPTION((AE_INFO, AE_ERROR,
1439                                         "acpi_bus_generate_event4() failed"));
1440                 }
1441                 acpi_bus_generate_netlink_event(ACPI_AC_CLASS, ACPI_AC_DIR_NAME,
1442                                                 ACPI_SBS_AC_NOTIFY_STATUS,
1443                                                 new_ac_present);
1444         }
1445
1446         if (data_type == DATA_TYPE_COMMON) {
1447                 if (!do_ac_init && !update_battery) {
1448                         goto end;
1449                 }
1450         }
1451
1452         if (data_type == DATA_TYPE_AC_STATE && !do_ac_init) {
1453                 goto end;
1454         }
1455
1456         for (id = id_min; id <= id_max; id++) {
1457                 battery = &sbs->battery[id];
1458                 if (battery->alive == 0) {
1459                         continue;
1460                 }
1461
1462                 old_remaining_capacity = battery->state.remaining_capacity;
1463
1464                 old_battery_present = battery->battery_present;
1465
1466                 result = acpi_battery_select(battery);
1467                 if (result) {
1468                         ACPI_EXCEPTION((AE_INFO, AE_ERROR,
1469                                         "acpi_battery_select() failed"));
1470                 }
1471
1472                 result = acpi_battery_get_present(battery);
1473                 if (result) {
1474                         ACPI_EXCEPTION((AE_INFO, AE_ERROR,
1475                                         "acpi_battery_get_present() failed"));
1476                 }
1477
1478                 new_battery_present = battery->battery_present;
1479
1480                 do_battery_init = ((old_battery_present != new_battery_present)
1481                                    && new_battery_present);
1482                 if (!new_battery_present)
1483                         goto event;
1484                 if (do_ac_init || do_battery_init) {
1485                         result = acpi_battery_init(battery);
1486                         if (result) {
1487                                 ACPI_EXCEPTION((AE_INFO, AE_ERROR,
1488                                                 "acpi_battery_init() "
1489                                                 "failed"));
1490                         }
1491                 }
1492                 if (sbs_zombie(sbs)) {
1493                         goto end;
1494                 }
1495
1496                 if ((data_type == DATA_TYPE_COMMON
1497                      || data_type == DATA_TYPE_INFO)
1498                     && new_battery_present) {
1499                         result = acpi_battery_get_info(battery);
1500                         if (result) {
1501                                 ACPI_EXCEPTION((AE_INFO, AE_ERROR,
1502                                                 "acpi_battery_get_info() failed"));
1503                         }
1504                 }
1505                 if (data_type == DATA_TYPE_INFO) {
1506                         continue;
1507                 }
1508                 if (sbs_zombie(sbs)) {
1509                         goto end;
1510                 }
1511
1512                 if ((data_type == DATA_TYPE_COMMON
1513                      || data_type == DATA_TYPE_STATE)
1514                     && new_battery_present) {
1515                         result = acpi_battery_get_state(battery);
1516                         if (result) {
1517                                 ACPI_EXCEPTION((AE_INFO, AE_ERROR,
1518                                                 "acpi_battery_get_state() failed"));
1519                         }
1520                 }
1521                 if (data_type == DATA_TYPE_STATE) {
1522                         goto event;
1523                 }
1524                 if (sbs_zombie(sbs)) {
1525                         goto end;
1526                 }
1527
1528                 if ((data_type == DATA_TYPE_COMMON
1529                      || data_type == DATA_TYPE_ALARM)
1530                     && new_battery_present) {
1531                         result = acpi_battery_get_alarm(battery);
1532                         if (result) {
1533                                 ACPI_EXCEPTION((AE_INFO, AE_ERROR,
1534                                                 "acpi_battery_get_alarm() "
1535                                                 "failed"));
1536                         }
1537                 }
1538                 if (data_type == DATA_TYPE_ALARM) {
1539                         continue;
1540                 }
1541                 if (sbs_zombie(sbs)) {
1542                         goto end;
1543                 }
1544
1545               event:
1546
1547                 if (old_battery_present != new_battery_present || do_ac_init ||
1548                     old_remaining_capacity !=
1549                     battery->state.remaining_capacity) {
1550                         sprintf(dir_name, ACPI_BATTERY_DIR_NAME, id);
1551                         result = acpi_bus_generate_proc_event4(ACPI_BATTERY_CLASS,
1552                                                          dir_name,
1553                                                          ACPI_SBS_BATTERY_NOTIFY_STATUS,
1554                                                          new_battery_present);
1555                         acpi_bus_generate_netlink_event(ACPI_BATTERY_CLASS, dir_name,
1556                                                         ACPI_SBS_BATTERY_NOTIFY_STATUS,
1557                                                         new_battery_present);
1558                         if (result) {
1559                                 ACPI_EXCEPTION((AE_INFO, AE_ERROR,
1560                                                 "acpi_bus_generate_proc_event4() "
1561                                                 "failed"));
1562                         }
1563                 }
1564         }
1565
1566       end:
1567
1568         return result;
1569 }
1570
1571 static void acpi_sbs_update_time(void *data)
1572 {
1573         struct acpi_sbs *sbs = data;
1574         unsigned long delay = -1;
1575         int result;
1576         unsigned int up_tm = update_time;
1577
1578         if (sbs_mutex_lock(sbs))
1579                 return;
1580
1581         result = acpi_sbs_update_run(sbs, -1, DATA_TYPE_COMMON);
1582         if (result) {
1583                 ACPI_EXCEPTION((AE_INFO, AE_ERROR,
1584                                 "acpi_sbs_update_run() failed"));
1585         }
1586
1587         if (sbs_zombie(sbs)) {
1588                 goto end;
1589         }
1590
1591         if (!up_tm) {
1592                 if (timer_pending(&sbs->update_timer))
1593                         del_timer(&sbs->update_timer);
1594         } else {
1595                 delay = (up_tm > UPDATE_DELAY ? UPDATE_DELAY : up_tm);
1596                 delay = jiffies + HZ * delay;
1597                 if (timer_pending(&sbs->update_timer)) {
1598                         mod_timer(&sbs->update_timer, delay);
1599                 } else {
1600                         sbs->update_timer.data = (unsigned long)data;
1601                         sbs->update_timer.function = acpi_sbs_update_time_run;
1602                         sbs->update_timer.expires = delay;
1603                         add_timer(&sbs->update_timer);
1604                 }
1605         }
1606
1607       end:
1608
1609         sbs_mutex_unlock(sbs);
1610 }
1611
1612 static int acpi_sbs_add(struct acpi_device *device)
1613 {
1614         struct acpi_sbs *sbs = NULL;
1615         int result = 0, remove_result = 0;
1616         int id;
1617         acpi_status status = AE_OK;
1618         unsigned long val;
1619
1620         status =
1621             acpi_evaluate_integer(device->handle, "_EC", NULL, &val);
1622         if (ACPI_FAILURE(status)) {
1623                 ACPI_EXCEPTION((AE_INFO, AE_ERROR, "Error obtaining _EC"));
1624                 return -EIO;
1625         }
1626
1627         sbs = kzalloc(sizeof(struct acpi_sbs), GFP_KERNEL);
1628         if (!sbs) {
1629                 ACPI_EXCEPTION((AE_INFO, AE_ERROR, "kzalloc() failed"));
1630                 result = -ENOMEM;
1631                 goto end;
1632         }
1633
1634         mutex_init(&sbs->mutex);
1635
1636         sbs_mutex_lock(sbs);
1637
1638         sbs->base = 0xff & (val >> 8);
1639         sbs->device = device;
1640
1641         strcpy(acpi_device_name(device), ACPI_SBS_DEVICE_NAME);
1642         strcpy(acpi_device_class(device), ACPI_SBS_CLASS);
1643         acpi_driver_data(device) = sbs;
1644
1645         result = acpi_ac_add(sbs);
1646         if (result) {
1647                 ACPI_EXCEPTION((AE_INFO, AE_ERROR, "acpi_ac_add() failed"));
1648                 goto end;
1649         }
1650
1651         acpi_sbsm_get_info(sbs);
1652
1653         if (!sbs->sbsm_present) {
1654                 result = acpi_battery_add(sbs, 0);
1655                 if (result) {
1656                         ACPI_EXCEPTION((AE_INFO, AE_ERROR,
1657                                         "acpi_battery_add() failed"));
1658                         goto end;
1659                 }
1660         } else {
1661                 for (id = 0; id < MAX_SBS_BAT; id++) {
1662                         if ((sbs->sbsm_batteries_supported & (1 << id))) {
1663                                 result = acpi_battery_add(sbs, id);
1664                                 if (result) {
1665                                         ACPI_EXCEPTION((AE_INFO, AE_ERROR,
1666                                                         "acpi_battery_add() failed"));
1667                                         goto end;
1668                                 }
1669                         }
1670                 }
1671         }
1672
1673         init_timer(&sbs->update_timer);
1674         result = acpi_check_update_proc(sbs);
1675         if (result)
1676                 goto end;
1677
1678       end:
1679
1680         sbs_mutex_unlock(sbs);
1681
1682         if (result) {
1683                 remove_result = acpi_sbs_remove(device, 0);
1684                 if (remove_result) {
1685                         ACPI_EXCEPTION((AE_INFO, AE_ERROR,
1686                                         "acpi_sbs_remove() failed"));
1687                 }
1688         }
1689
1690         return result;
1691 }
1692
1693 static int acpi_sbs_remove(struct acpi_device *device, int type)
1694 {
1695         struct acpi_sbs *sbs;
1696         int id;
1697
1698         if (!device) {
1699                 return -EINVAL;
1700         }
1701
1702         sbs = acpi_driver_data(device);
1703         if (!sbs) {
1704                 return -EINVAL;
1705         }
1706
1707         sbs_mutex_lock(sbs);
1708
1709         sbs->zombie = 1;
1710         del_timer_sync(&sbs->update_timer);
1711         acpi_os_wait_events_complete(NULL);
1712         del_timer_sync(&sbs->update_timer);
1713
1714         for (id = 0; id < MAX_SBS_BAT; id++) {
1715                 acpi_battery_remove(sbs, id);
1716         }
1717
1718         acpi_ac_remove(sbs);
1719
1720         sbs_mutex_unlock(sbs);
1721
1722         mutex_destroy(&sbs->mutex);
1723
1724         kfree(sbs);
1725
1726         return 0;
1727 }
1728
1729 static void acpi_sbs_rmdirs(void)
1730 {
1731         if (acpi_ac_dir) {
1732                 acpi_unlock_ac_dir(acpi_ac_dir);
1733                 acpi_ac_dir = NULL;
1734         }
1735         if (acpi_battery_dir) {
1736                 acpi_unlock_battery_dir(acpi_battery_dir);
1737                 acpi_battery_dir = NULL;
1738         }
1739 }
1740
1741 static int acpi_sbs_resume(struct acpi_device *device)
1742 {
1743         struct acpi_sbs *sbs;
1744
1745         if (!device)
1746                 return -EINVAL;
1747
1748         sbs = device->driver_data;
1749
1750         sbs->run_cnt = 0;
1751
1752         return 0;
1753 }
1754
1755 static int __init acpi_sbs_init(void)
1756 {
1757         int result = 0;
1758
1759         if (acpi_disabled)
1760                 return -ENODEV;
1761
1762         if (capacity_mode != DEF_CAPACITY_UNIT
1763             && capacity_mode != MAH_CAPACITY_UNIT
1764             && capacity_mode != MWH_CAPACITY_UNIT) {
1765                 ACPI_EXCEPTION((AE_INFO, AE_ERROR,
1766                                 "invalid capacity_mode = %d", capacity_mode));
1767                 return -EINVAL;
1768         }
1769
1770         acpi_ac_dir = acpi_lock_ac_dir();
1771         if (!acpi_ac_dir) {
1772                 ACPI_EXCEPTION((AE_INFO, AE_ERROR,
1773                                 "acpi_lock_ac_dir() failed"));
1774                 return -ENODEV;
1775         }
1776
1777         acpi_battery_dir = acpi_lock_battery_dir();
1778         if (!acpi_battery_dir) {
1779                 ACPI_EXCEPTION((AE_INFO, AE_ERROR,
1780                                 "acpi_lock_battery_dir() failed"));
1781                 acpi_sbs_rmdirs();
1782                 return -ENODEV;
1783         }
1784
1785         result = acpi_bus_register_driver(&acpi_sbs_driver);
1786         if (result < 0) {
1787                 ACPI_EXCEPTION((AE_INFO, AE_ERROR,
1788                                 "acpi_bus_register_driver() failed"));
1789                 acpi_sbs_rmdirs();
1790                 return -ENODEV;
1791         }
1792
1793         return 0;
1794 }
1795
1796 static void __exit acpi_sbs_exit(void)
1797 {
1798         acpi_bus_unregister_driver(&acpi_sbs_driver);
1799
1800         acpi_sbs_rmdirs();
1801
1802         return;
1803 }
1804
1805 module_init(acpi_sbs_init);
1806 module_exit(acpi_sbs_exit);