SAFE public projects git trees. - safe/jmp/linux-2.6/blob - drivers/acpi/sbs.c

   1 /*
   2  *  sbs.c - ACPI Smart Battery System Driver ($Revision: 2.0 $)
   3  *
   4  *  Copyright (c) 2007 Alexey Starikovskiy <astarikovskiy@suse.de>
   5  *  Copyright (c) 2005-2007 Vladimir Lebedev <vladimir.p.lebedev@intel.com>
   6  *  Copyright (c) 2005 Rich Townsend <rhdt@bartol.udel.edu>
   7  *
   8  * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
   9  *
  10  *  This program is free software; you can redistribute it and/or modify
  11  *  it under the terms of the GNU General Public License as published by
  12  *  the Free Software Foundation; either version 2 of the License, or (at
  13  *  your option) any later version.
  14  *
  15  *  This program is distributed in the hope that it will be useful, but
  16  *  WITHOUT ANY WARRANTY; without even the implied warranty of
  17  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  18  *  General Public License for more details.
  19  *
  20  *  You should have received a copy of the GNU General Public License along
  21  *  with this program; if not, write to the Free Software Foundation, Inc.,
  22  *  59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
  23  *
  24  * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
  25  */
  26
  27 #include <linux/init.h>
  28 #include <linux/module.h>
  29 #include <linux/moduleparam.h>
  30 #include <linux/kernel.h>
  31
  32 #ifdef CONFIG_ACPI_PROCFS
  33 #include <linux/proc_fs.h>
  34 #include <linux/seq_file.h>
  35 #include <asm/uaccess.h>
  36 #endif
  37
  38 #include <linux/acpi.h>
  39 #include <linux/timer.h>
  40 #include <linux/jiffies.h>
  41 #include <linux/delay.h>
  42
  43 #include <linux/power_supply.h>
  44
  45 #include "sbshc.h"
  46
  47 #define ACPI_SBS_CLASS                  "sbs"
  48 #define ACPI_AC_CLASS                   "ac_adapter"
  49 #define ACPI_BATTERY_CLASS              "battery"
  50 #define ACPI_SBS_DEVICE_NAME            "Smart Battery System"
  51 #define ACPI_SBS_FILE_INFO              "info"
  52 #define ACPI_SBS_FILE_STATE             "state"
  53 #define ACPI_SBS_FILE_ALARM             "alarm"
  54 #define ACPI_BATTERY_DIR_NAME           "BAT%i"
  55 #define ACPI_AC_DIR_NAME                "AC0"
  56
  57 enum acpi_sbs_device_addr {
  58         ACPI_SBS_CHARGER = 0x9,
  59         ACPI_SBS_MANAGER = 0xa,
  60         ACPI_SBS_BATTERY = 0xb,
  61 };
  62
  63 #define ACPI_SBS_NOTIFY_STATUS          0x80
  64 #define ACPI_SBS_NOTIFY_INFO            0x81
  65
  66 MODULE_AUTHOR("Alexey Starikovskiy <astarikovskiy@suse.de>");
  67 MODULE_DESCRIPTION("Smart Battery System ACPI interface driver");
  68 MODULE_LICENSE("GPL");
  69
  70 static unsigned int cache_time = 1000;
  71 module_param(cache_time, uint, 0644);
  72 MODULE_PARM_DESC(cache_time, "cache time in milliseconds");
  73
  74 extern struct proc_dir_entry *acpi_lock_ac_dir(void);
  75 extern struct proc_dir_entry *acpi_lock_battery_dir(void);
  76 extern void acpi_unlock_ac_dir(struct proc_dir_entry *acpi_ac_dir);
  77 extern void acpi_unlock_battery_dir(struct proc_dir_entry *acpi_battery_dir);
  78
  79 #define MAX_SBS_BAT                     4
  80 #define ACPI_SBS_BLOCK_MAX              32
  81
  82 static const struct acpi_device_id sbs_device_ids[] = {
  83         {"ACPI0002", 0},
  84         {"", 0},
  85 };
  86 MODULE_DEVICE_TABLE(acpi, sbs_device_ids);
  87
  88 struct acpi_battery {
  89         struct power_supply bat;
  90         struct acpi_sbs *sbs;
  91 #ifdef CONFIG_ACPI_PROCFS
  92         struct proc_dir_entry *proc_entry;
  93 #endif
  94         unsigned long update_time;
  95         char name[8];
  96         char manufacturer_name[ACPI_SBS_BLOCK_MAX];
  97         char device_name[ACPI_SBS_BLOCK_MAX];
  98         char device_chemistry[ACPI_SBS_BLOCK_MAX];
  99         u16 alarm_capacity;
 100         u16 full_charge_capacity;
 101         u16 design_capacity;
 102         u16 design_voltage;
 103         u16 serial_number;
 104         u16 cycle_count;
 105         u16 temp_now;
 106         u16 voltage_now;
 107         s16 current_now;
 108         s16 current_avg;
 109         u16 capacity_now;
 110         u16 state_of_charge;
 111         u16 state;
 112         u16 mode;
 113         u16 spec;
 114         u8 id;
 115         u8 present:1;
 116 };
 117
 118 #define to_acpi_battery(x) container_of(x, struct acpi_battery, bat);
 119
 120 struct acpi_sbs {
 121         struct power_supply charger;
 122         struct acpi_device *device;
 123         struct acpi_smb_hc *hc;
 124         struct mutex lock;
 125 #ifdef CONFIG_ACPI_PROCFS
 126         struct proc_dir_entry *charger_entry;
 127 #endif
 128         struct acpi_battery battery[MAX_SBS_BAT];
 129         u8 batteries_supported:4;
 130         u8 manager_present:1;
 131         u8 charger_present:1;
 132 };
 133
 134 #define to_acpi_sbs(x) container_of(x, struct acpi_sbs, charger)
 135
 136 static inline int battery_scale(int log)
 137 {
 138         int scale = 1;
 139         while (log--)
 140                 scale *= 10;
 141         return scale;
 142 }
 143
 144 static inline int acpi_battery_vscale(struct acpi_battery *battery)
 145 {
 146         return battery_scale((battery->spec & 0x0f00) >> 8);
 147 }
 148
 149 static inline int acpi_battery_ipscale(struct acpi_battery *battery)
 150 {
 151         return battery_scale((battery->spec & 0xf000) >> 12);
 152 }
 153
 154 static inline int acpi_battery_mode(struct acpi_battery *battery)
 155 {
 156         return (battery->mode & 0x8000);
 157 }
 158
 159 static inline int acpi_battery_scale(struct acpi_battery *battery)
 160 {
 161         return (acpi_battery_mode(battery) ? 10 : 1) *
 162             acpi_battery_ipscale(battery);
 163 }
 164
 165 static int sbs_get_ac_property(struct power_supply *psy,
 166                                enum power_supply_property psp,
 167                                union power_supply_propval *val)
 168 {
 169         struct acpi_sbs *sbs = to_acpi_sbs(psy);
 170         switch (psp) {
 171         case POWER_SUPPLY_PROP_ONLINE:
 172                 val->intval = sbs->charger_present;
 173                 break;
 174         default:
 175                 return -EINVAL;
 176         }
 177         return 0;
 178 }
 179
 180 static int acpi_battery_technology(struct acpi_battery *battery)
 181 {
 182         if (!strcasecmp("NiCd", battery->device_chemistry))
 183                 return POWER_SUPPLY_TECHNOLOGY_NiCd;
 184         if (!strcasecmp("NiMH", battery->device_chemistry))
 185                 return POWER_SUPPLY_TECHNOLOGY_NiMH;
 186         if (!strcasecmp("LION", battery->device_chemistry))
 187                 return POWER_SUPPLY_TECHNOLOGY_LION;
 188         if (!strcasecmp("LiP", battery->device_chemistry))
 189                 return POWER_SUPPLY_TECHNOLOGY_LIPO;
 190         return POWER_SUPPLY_TECHNOLOGY_UNKNOWN;
 191 }
 192
 193 static int acpi_sbs_battery_get_property(struct power_supply *psy,
 194                                          enum power_supply_property psp,
 195                                          union power_supply_propval *val)
 196 {
 197         struct acpi_battery *battery = to_acpi_battery(psy);
 198
 199         if ((!battery->present) && psp != POWER_SUPPLY_PROP_PRESENT)
 200                 return -ENODEV;
 201         switch (psp) {
 202         case POWER_SUPPLY_PROP_STATUS:
 203                 if (battery->current_now < 0)
 204                         val->intval = POWER_SUPPLY_STATUS_DISCHARGING;
 205                 else if (battery->current_now > 0)
 206                         val->intval = POWER_SUPPLY_STATUS_CHARGING;
 207                 else
 208                         val->intval = POWER_SUPPLY_STATUS_FULL;
 209                 break;
 210         case POWER_SUPPLY_PROP_PRESENT:
 211                 val->intval = battery->present;
 212                 break;
 213         case POWER_SUPPLY_PROP_TECHNOLOGY:
 214                 val->intval = acpi_battery_technology(battery);
 215                 break;
 216         case POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN:
 217                 val->intval = battery->design_voltage *
 218                         acpi_battery_vscale(battery) * 1000;
 219                 break;
 220         case POWER_SUPPLY_PROP_VOLTAGE_NOW:
 221                 val->intval = battery->voltage_now *
 222                                 acpi_battery_vscale(battery) * 1000;
 223                 break;
 224         case POWER_SUPPLY_PROP_CURRENT_NOW:
 225                 val->intval = abs(battery->current_now) *
 226                                 acpi_battery_ipscale(battery) * 1000;
 227                 break;
 228         case POWER_SUPPLY_PROP_CURRENT_AVG:
 229                 val->intval = abs(battery->current_avg) *
 230                                 acpi_battery_ipscale(battery) * 1000;
 231                 break;
 232         case POWER_SUPPLY_PROP_CAPACITY:
 233                 val->intval = battery->state_of_charge;
 234                 break;
 235         case POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN:
 236         case POWER_SUPPLY_PROP_ENERGY_FULL_DESIGN:
 237                 val->intval = battery->design_capacity *
 238                         acpi_battery_scale(battery) * 1000;
 239                 break;
 240         case POWER_SUPPLY_PROP_CHARGE_FULL:
 241         case POWER_SUPPLY_PROP_ENERGY_FULL:
 242                 val->intval = battery->full_charge_capacity *
 243                         acpi_battery_scale(battery) * 1000;
 244                 break;
 245         case POWER_SUPPLY_PROP_CHARGE_NOW:
 246         case POWER_SUPPLY_PROP_ENERGY_NOW:
 247                 val->intval = battery->capacity_now *
 248                                 acpi_battery_scale(battery) * 1000;
 249                 break;
 250         case POWER_SUPPLY_PROP_TEMP:
 251                 val->intval = battery->temp_now - 2730; // dK -> dC
 252                 break;
 253         case POWER_SUPPLY_PROP_MODEL_NAME:
 254                 val->strval = battery->device_name;
 255                 break;
 256         case POWER_SUPPLY_PROP_MANUFACTURER:
 257                 val->strval = battery->manufacturer_name;
 258                 break;
 259         default:
 260                 return -EINVAL;
 261         }
 262         return 0;
 263 }
 264
 265 static enum power_supply_property sbs_ac_props[] = {
 266         POWER_SUPPLY_PROP_ONLINE,
 267 };
 268
 269 static enum power_supply_property sbs_charge_battery_props[] = {
 270         POWER_SUPPLY_PROP_STATUS,
 271         POWER_SUPPLY_PROP_PRESENT,
 272         POWER_SUPPLY_PROP_TECHNOLOGY,
 273         POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN,
 274         POWER_SUPPLY_PROP_VOLTAGE_NOW,
 275         POWER_SUPPLY_PROP_CURRENT_NOW,
 276         POWER_SUPPLY_PROP_CURRENT_AVG,
 277         POWER_SUPPLY_PROP_CAPACITY,
 278         POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN,
 279         POWER_SUPPLY_PROP_CHARGE_FULL,
 280         POWER_SUPPLY_PROP_CHARGE_NOW,
 281         POWER_SUPPLY_PROP_TEMP,
 282         POWER_SUPPLY_PROP_MODEL_NAME,
 283         POWER_SUPPLY_PROP_MANUFACTURER,
 284 };
 285
 286 static enum power_supply_property sbs_energy_battery_props[] = {
 287         POWER_SUPPLY_PROP_STATUS,
 288         POWER_SUPPLY_PROP_PRESENT,
 289         POWER_SUPPLY_PROP_TECHNOLOGY,
 290         POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN,
 291         POWER_SUPPLY_PROP_VOLTAGE_NOW,
 292         POWER_SUPPLY_PROP_CURRENT_NOW,
 293         POWER_SUPPLY_PROP_CURRENT_AVG,
 294         POWER_SUPPLY_PROP_CAPACITY,
 295         POWER_SUPPLY_PROP_ENERGY_FULL_DESIGN,
 296         POWER_SUPPLY_PROP_ENERGY_FULL,
 297         POWER_SUPPLY_PROP_ENERGY_NOW,
 298         POWER_SUPPLY_PROP_TEMP,
 299         POWER_SUPPLY_PROP_MODEL_NAME,
 300         POWER_SUPPLY_PROP_MANUFACTURER,
 301 };
 302
 303 /* --------------------------------------------------------------------------
 304                             Smart Battery System Management
 305    -------------------------------------------------------------------------- */
 306
 307 struct acpi_battery_reader {
 308         u8 command;             /* command for battery */
 309         u8 mode;                /* word or block? */
 310         size_t offset;          /* offset inside struct acpi_sbs_battery */
 311 };
 312
 313 static struct acpi_battery_reader info_readers[] = {
 314         {0x01, SMBUS_READ_WORD, offsetof(struct acpi_battery, alarm_capacity)},
 315         {0x03, SMBUS_READ_WORD, offsetof(struct acpi_battery, mode)},
 316         {0x10, SMBUS_READ_WORD, offsetof(struct acpi_battery, full_charge_capacity)},
 317         {0x17, SMBUS_READ_WORD, offsetof(struct acpi_battery, cycle_count)},
 318         {0x18, SMBUS_READ_WORD, offsetof(struct acpi_battery, design_capacity)},
 319         {0x19, SMBUS_READ_WORD, offsetof(struct acpi_battery, design_voltage)},
 320         {0x1a, SMBUS_READ_WORD, offsetof(struct acpi_battery, spec)},
 321         {0x1c, SMBUS_READ_WORD, offsetof(struct acpi_battery, serial_number)},
 322         {0x20, SMBUS_READ_BLOCK, offsetof(struct acpi_battery, manufacturer_name)},
 323         {0x21, SMBUS_READ_BLOCK, offsetof(struct acpi_battery, device_name)},
 324         {0x22, SMBUS_READ_BLOCK, offsetof(struct acpi_battery, device_chemistry)},
 325 };
 326
 327 static struct acpi_battery_reader state_readers[] = {
 328         {0x08, SMBUS_READ_WORD, offsetof(struct acpi_battery, temp_now)},
 329         {0x09, SMBUS_READ_WORD, offsetof(struct acpi_battery, voltage_now)},
 330         {0x0a, SMBUS_READ_WORD, offsetof(struct acpi_battery, current_now)},
 331         {0x0b, SMBUS_READ_WORD, offsetof(struct acpi_battery, current_avg)},
 332         {0x0f, SMBUS_READ_WORD, offsetof(struct acpi_battery, capacity_now)},
 333         {0x0e, SMBUS_READ_WORD, offsetof(struct acpi_battery, state_of_charge)},
 334         {0x16, SMBUS_READ_WORD, offsetof(struct acpi_battery, state)},
 335 };
 336
 337 static int acpi_manager_get_info(struct acpi_sbs *sbs)
 338 {
 339         int result = 0;
 340         u16 battery_system_info;
 341
 342         result = acpi_smbus_read(sbs->hc, SMBUS_READ_WORD, ACPI_SBS_MANAGER,
 343                                  0x04, (u8 *)&battery_system_info);
 344         if (!result)
 345                 sbs->batteries_supported = battery_system_info & 0x000f;
 346         return result;
 347 }
 348
 349 static int acpi_battery_get_info(struct acpi_battery *battery)
 350 {
 351         int i, result = 0;
 352
 353         for (i = 0; i < ARRAY_SIZE(info_readers); ++i) {
 354                 result = acpi_smbus_read(battery->sbs->hc,
 355                                          info_readers[i].mode,
 356                                          ACPI_SBS_BATTERY,
 357                                          info_readers[i].command,
 358                                          (u8 *) battery +
 359                                                 info_readers[i].offset);
 360                 if (result)
 361                         break;
 362         }
 363         return result;
 364 }
 365
 366 static int acpi_battery_get_state(struct acpi_battery *battery)
 367 {
 368         int i, result = 0;
 369
 370         if (battery->update_time &&
 371             time_before(jiffies, battery->update_time +
 372                                 msecs_to_jiffies(cache_time)))
 373                 return 0;
 374         for (i = 0; i < ARRAY_SIZE(state_readers); ++i) {
 375                 result = acpi_smbus_read(battery->sbs->hc,
 376                                          state_readers[i].mode,
 377                                          ACPI_SBS_BATTERY,
 378                                          state_readers[i].command,
 379                                          (u8 *)battery +
 380                                                 state_readers[i].offset);
 381                 if (result)
 382                         goto end;
 383         }
 384       end:
 385         battery->update_time = jiffies;
 386         return result;
 387 }
 388
 389 #ifdef CONFIG_ACPI_PROCFS
 390
 391 static int acpi_battery_get_alarm(struct acpi_battery *battery)
 392 {
 393         return acpi_smbus_read(battery->sbs->hc, SMBUS_READ_WORD,
 394                                  ACPI_SBS_BATTERY, 0x01,
 395                                  (u8 *)&battery->alarm_capacity);
 396 }
 397
 398 static int acpi_battery_set_alarm(struct acpi_battery *battery)
 399 {
 400         struct acpi_sbs *sbs = battery->sbs;
 401         u16 value, sel = 1 << (battery->id + 12);
 402
 403         int ret;
 404
 405
 406         if (sbs->manager_present) {
 407                 ret = acpi_smbus_read(sbs->hc, SMBUS_READ_WORD, ACPI_SBS_MANAGER,
 408                                 0x01, (u8 *)&value);
 409                 if (ret)
 410                         goto end;
 411                 if ((value & 0xf000) != sel) {
 412                         value &= 0x0fff;
 413                         value |= sel;
 414                 ret = acpi_smbus_write(sbs->hc, SMBUS_WRITE_WORD,
 415                                          ACPI_SBS_MANAGER,
 416                                          0x01, (u8 *)&value, 2);
 417                 if (ret)
 418                         goto end;
 419                 }
 420         }
 421         ret = acpi_smbus_write(sbs->hc, SMBUS_WRITE_WORD, ACPI_SBS_BATTERY,
 422                                 0x01, (u8 *)&battery->alarm_capacity, 2);
 423       end:
 424         return ret;
 425 }
 426
 427 #endif
 428
 429 static int acpi_ac_get_present(struct acpi_sbs *sbs)
 430 {
 431         int result;
 432         u16 status;
 433
 434         result = acpi_smbus_read(sbs->hc, SMBUS_READ_WORD, ACPI_SBS_CHARGER,
 435                                  0x13, (u8 *) & status);
 436         if (!result)
 437                 sbs->charger_present = (status >> 15) & 0x1;
 438         return result;
 439 }
 440
 441 /* --------------------------------------------------------------------------
 442                               FS Interface (/proc/acpi)
 443    -------------------------------------------------------------------------- */
 444
 445 #ifdef CONFIG_ACPI_PROCFS
 446 /* Generic Routines */
 447 static int
 448 acpi_sbs_add_fs(struct proc_dir_entry **dir,
 449                 struct proc_dir_entry *parent_dir,
 450                 char *dir_name,
 451                 struct file_operations *info_fops,
 452                 struct file_operations *state_fops,
 453                 struct file_operations *alarm_fops, void *data)
 454 {
 455         struct proc_dir_entry *entry = NULL;
 456
 457         if (!*dir) {
 458                 *dir = proc_mkdir(dir_name, parent_dir);
 459                 if (!*dir) {
 460                         return -ENODEV;
 461                 }
 462                 (*dir)->owner = THIS_MODULE;
 463         }
 464
 465         /* 'info' [R] */
 466         if (info_fops) {
 467                 entry = create_proc_entry(ACPI_SBS_FILE_INFO, S_IRUGO, *dir);
 468                 if (entry) {
 469                         entry->proc_fops = info_fops;
 470                         entry->data = data;
 471                         entry->owner = THIS_MODULE;
 472                 }
 473         }
 474
 475         /* 'state' [R] */
 476         if (state_fops) {
 477                 entry = create_proc_entry(ACPI_SBS_FILE_STATE, S_IRUGO, *dir);
 478                 if (entry) {
 479                         entry->proc_fops = state_fops;
 480                         entry->data = data;
 481                         entry->owner = THIS_MODULE;
 482                 }
 483         }
 484
 485         /* 'alarm' [R/W] */
 486         if (alarm_fops) {
 487                 entry = create_proc_entry(ACPI_SBS_FILE_ALARM, S_IRUGO, *dir);
 488                 if (entry) {
 489                         entry->proc_fops = alarm_fops;
 490                         entry->data = data;
 491                         entry->owner = THIS_MODULE;
 492                 }
 493         }
 494         return 0;
 495 }
 496
 497 static void
 498 acpi_sbs_remove_fs(struct proc_dir_entry **dir,
 499                            struct proc_dir_entry *parent_dir)
 500 {
 501         if (*dir) {
 502                 remove_proc_entry(ACPI_SBS_FILE_INFO, *dir);
 503                 remove_proc_entry(ACPI_SBS_FILE_STATE, *dir);
 504                 remove_proc_entry(ACPI_SBS_FILE_ALARM, *dir);
 505                 remove_proc_entry((*dir)->name, parent_dir);
 506                 *dir = NULL;
 507         }
 508 }
 509
 510 /* Smart Battery Interface */
 511 static struct proc_dir_entry *acpi_battery_dir = NULL;
 512
 513 static inline char *acpi_battery_units(struct acpi_battery *battery)
 514 {
 515         return acpi_battery_mode(battery) ? " mWh" : " mAh";
 516 }
 517
 518
 519 static int acpi_battery_read_info(struct seq_file *seq, void *offset)
 520 {
 521         struct acpi_battery *battery = seq->private;
 522         struct acpi_sbs *sbs = battery->sbs;
 523         int result = 0;
 524
 525         mutex_lock(&sbs->lock);
 526
 527         seq_printf(seq, "present:                 %s\n",
 528                    (battery->present) ? "yes" : "no");
 529         if (!battery->present)
 530                 goto end;
 531
 532         seq_printf(seq, "design capacity:         %i%s\n",
 533                    battery->design_capacity * acpi_battery_scale(battery),
 534                    acpi_battery_units(battery));
 535         seq_printf(seq, "last full capacity:      %i%s\n",
 536                    battery->full_charge_capacity * acpi_battery_scale(battery),
 537                    acpi_battery_units(battery));
 538         seq_printf(seq, "battery technology:      rechargeable\n");
 539         seq_printf(seq, "design voltage:          %i mV\n",
 540                    battery->design_voltage * acpi_battery_vscale(battery));
 541         seq_printf(seq, "design capacity warning: unknown\n");
 542         seq_printf(seq, "design capacity low:     unknown\n");
 543         seq_printf(seq, "capacity granularity 1:  unknown\n");
 544         seq_printf(seq, "capacity granularity 2:  unknown\n");
 545         seq_printf(seq, "model number:            %s\n", battery->device_name);
 546         seq_printf(seq, "serial number:           %i\n",
 547                    battery->serial_number);
 548         seq_printf(seq, "battery type:            %s\n",
 549                    battery->device_chemistry);
 550         seq_printf(seq, "OEM info:                %s\n",
 551                    battery->manufacturer_name);
 552       end:
 553         mutex_unlock(&sbs->lock);
 554         return result;
 555 }
 556
 557 static int acpi_battery_info_open_fs(struct inode *inode, struct file *file)
 558 {
 559         return single_open(file, acpi_battery_read_info, PDE(inode)->data);
 560 }
 561
 562 static int acpi_battery_read_state(struct seq_file *seq, void *offset)
 563 {
 564         struct acpi_battery *battery = seq->private;
 565         struct acpi_sbs *sbs = battery->sbs;
 566         int result = 0;
 567
 568         mutex_lock(&sbs->lock);
 569         seq_printf(seq, "present:                 %s\n",
 570                    (battery->present) ? "yes" : "no");
 571         if (!battery->present)
 572                 goto end;
 573
 574         acpi_battery_get_state(battery);
 575         seq_printf(seq, "capacity state:          %s\n",
 576                    (battery->state & 0x0010) ? "critical" : "ok");
 577         seq_printf(seq, "charging state:          %s\n",
 578                    (battery->current_now < 0) ? "discharging" :
 579                    ((battery->current_now > 0) ? "charging" : "charged"));
 580         seq_printf(seq, "present rate:            %d mA\n",
 581                    abs(battery->current_now) * acpi_battery_ipscale(battery));
 582         seq_printf(seq, "remaining capacity:      %i%s\n",
 583                    battery->capacity_now * acpi_battery_scale(battery),
 584                    acpi_battery_units(battery));
 585         seq_printf(seq, "present voltage:         %i mV\n",
 586                    battery->voltage_now * acpi_battery_vscale(battery));
 587
 588       end:
 589         mutex_unlock(&sbs->lock);
 590         return result;
 591 }
 592
 593 static int acpi_battery_state_open_fs(struct inode *inode, struct file *file)
 594 {
 595         return single_open(file, acpi_battery_read_state, PDE(inode)->data);
 596 }
 597
 598 static int acpi_battery_read_alarm(struct seq_file *seq, void *offset)
 599 {
 600         struct acpi_battery *battery = seq->private;
 601         struct acpi_sbs *sbs = battery->sbs;
 602         int result = 0;
 603
 604         mutex_lock(&sbs->lock);
 605
 606         if (!battery->present) {
 607                 seq_printf(seq, "present:                 no\n");
 608                 goto end;
 609         }
 610
 611         acpi_battery_get_alarm(battery);
 612         seq_printf(seq, "alarm:                   ");
 613         if (battery->alarm_capacity)
 614                 seq_printf(seq, "%i%s\n",
 615                            battery->alarm_capacity *
 616                            acpi_battery_scale(battery),
 617                            acpi_battery_units(battery));
 618         else
 619                 seq_printf(seq, "disabled\n");
 620       end:
 621         mutex_unlock(&sbs->lock);
 622         return result;
 623 }
 624
 625 static ssize_t
 626 acpi_battery_write_alarm(struct file *file, const char __user * buffer,
 627                          size_t count, loff_t * ppos)
 628 {
 629         struct seq_file *seq = file->private_data;
 630         struct acpi_battery *battery = seq->private;
 631         struct acpi_sbs *sbs = battery->sbs;
 632         char alarm_string[12] = { '\0' };
 633         int result = 0;
 634         mutex_lock(&sbs->lock);
 635         if (!battery->present) {
 636                 result = -ENODEV;
 637                 goto end;
 638         }
 639         if (count > sizeof(alarm_string) - 1) {
 640                 result = -EINVAL;
 641                 goto end;
 642         }
 643         if (copy_from_user(alarm_string, buffer, count)) {
 644                 result = -EFAULT;
 645                 goto end;
 646         }
 647         alarm_string[count] = 0;
 648         battery->alarm_capacity = simple_strtoul(alarm_string, NULL, 0) /
 649                                         acpi_battery_scale(battery);
 650         acpi_battery_set_alarm(battery);
 651       end:
 652         mutex_unlock(&sbs->lock);
 653         if (result)
 654                 return result;
 655         return count;
 656 }
 657
 658 static int acpi_battery_alarm_open_fs(struct inode *inode, struct file *file)
 659 {
 660         return single_open(file, acpi_battery_read_alarm, PDE(inode)->data);
 661 }
 662
 663 static struct file_operations acpi_battery_info_fops = {
 664         .open = acpi_battery_info_open_fs,
 665         .read = seq_read,
 666         .llseek = seq_lseek,
 667         .release = single_release,
 668         .owner = THIS_MODULE,
 669 };
 670
 671 static struct file_operations acpi_battery_state_fops = {
 672         .open = acpi_battery_state_open_fs,
 673         .read = seq_read,
 674         .llseek = seq_lseek,
 675         .release = single_release,
 676         .owner = THIS_MODULE,
 677 };
 678
 679 static struct file_operations acpi_battery_alarm_fops = {
 680         .open = acpi_battery_alarm_open_fs,
 681         .read = seq_read,
 682         .write = acpi_battery_write_alarm,
 683         .llseek = seq_lseek,
 684         .release = single_release,
 685         .owner = THIS_MODULE,
 686 };
 687
 688 /* Legacy AC Adapter Interface */
 689
 690 static struct proc_dir_entry *acpi_ac_dir = NULL;
 691
 692 static int acpi_ac_read_state(struct seq_file *seq, void *offset)
 693 {
 694
 695         struct acpi_sbs *sbs = seq->private;
 696
 697         mutex_lock(&sbs->lock);
 698
 699         seq_printf(seq, "state:                   %s\n",
 700                    sbs->charger_present ? "on-line" : "off-line");
 701
 702         mutex_unlock(&sbs->lock);
 703         return 0;
 704 }
 705
 706 static int acpi_ac_state_open_fs(struct inode *inode, struct file *file)
 707 {
 708         return single_open(file, acpi_ac_read_state, PDE(inode)->data);
 709 }
 710
 711 static struct file_operations acpi_ac_state_fops = {
 712         .open = acpi_ac_state_open_fs,
 713         .read = seq_read,
 714         .llseek = seq_lseek,
 715         .release = single_release,
 716         .owner = THIS_MODULE,
 717 };
 718
 719 #endif
 720
 721 /* --------------------------------------------------------------------------
 722                                  Driver Interface
 723    -------------------------------------------------------------------------- */
 724 static int acpi_battery_read(struct acpi_battery *battery)
 725 {
 726         int result = 0, saved_present = battery->present;
 727         u16 state;
 728
 729         if (battery->sbs->manager_present) {
 730                 result = acpi_smbus_read(battery->sbs->hc, SMBUS_READ_WORD,
 731                                 ACPI_SBS_MANAGER, 0x01, (u8 *)&state);
 732                 if (!result)
 733                         battery->present = state & (1 << battery->id);
 734                 state &= 0x0fff;
 735                 state |= 1 << (battery->id + 12);
 736                 acpi_smbus_write(battery->sbs->hc, SMBUS_WRITE_WORD,
 737                                   ACPI_SBS_MANAGER, 0x01, (u8 *)&state, 2);
 738         } else if (battery->id == 0)
 739                 battery->present = 1;
 740         if (result || !battery->present)
 741                 return result;
 742
 743         if (saved_present != battery->present) {
 744                 battery->update_time = 0;
 745                 result = acpi_battery_get_info(battery);
 746                 if (result)
 747                         return result;
 748         }
 749         result = acpi_battery_get_state(battery);
 750         return result;
 751 }
 752
 753 /* Smart Battery */
 754 static int acpi_battery_add(struct acpi_sbs *sbs, int id)
 755 {
 756         struct acpi_battery *battery = &sbs->battery[id];
 757         int result;
 758
 759         battery->id = id;
 760         battery->sbs = sbs;
 761         result = acpi_battery_read(battery);
 762         if (result)
 763                 return result;
 764
 765         sprintf(battery->name, ACPI_BATTERY_DIR_NAME, id);
 766 #ifdef CONFIG_ACPI_PROCFS
 767         acpi_sbs_add_fs(&battery->proc_entry, acpi_battery_dir,
 768                         battery->name, &acpi_battery_info_fops,
 769                         &acpi_battery_state_fops, &acpi_battery_alarm_fops,
 770                         battery);
 771 #endif
 772         battery->bat.name = battery->name;
 773         battery->bat.type = POWER_SUPPLY_TYPE_BATTERY;
 774         if (!acpi_battery_mode(battery)) {
 775                 battery->bat.properties = sbs_charge_battery_props;
 776                 battery->bat.num_properties =
 777                     ARRAY_SIZE(sbs_charge_battery_props);
 778         } else {
 779                 battery->bat.properties = sbs_energy_battery_props;
 780                 battery->bat.num_properties =
 781                     ARRAY_SIZE(sbs_energy_battery_props);
 782         }
 783         battery->bat.get_property = acpi_sbs_battery_get_property;
 784         result = power_supply_register(&sbs->device->dev, &battery->bat);
 785         printk(KERN_INFO PREFIX "%s [%s]: Battery Slot [%s] (battery %s)\n",
 786                ACPI_SBS_DEVICE_NAME, acpi_device_bid(sbs->device),
 787                battery->name, sbs->battery->present ? "present" : "absent");
 788         return result;
 789 }
 790
 791 static void acpi_battery_remove(struct acpi_sbs *sbs, int id)
 792 {
 793         if (sbs->battery[id].bat.dev)
 794                 power_supply_unregister(&sbs->battery[id].bat);
 795 #ifdef CONFIG_ACPI_PROCFS
 796         if (sbs->battery[id].proc_entry) {
 797                 acpi_sbs_remove_fs(&(sbs->battery[id].proc_entry),
 798                                    acpi_battery_dir);
 799         }
 800 #endif
 801 }
 802
 803 static int acpi_charger_add(struct acpi_sbs *sbs)
 804 {
 805         int result;
 806
 807         result = acpi_ac_get_present(sbs);
 808         if (result)
 809                 goto end;
 810 #ifdef CONFIG_ACPI_PROCFS
 811         result = acpi_sbs_add_fs(&sbs->charger_entry, acpi_ac_dir,
 812                                  ACPI_AC_DIR_NAME, NULL,
 813                                  &acpi_ac_state_fops, NULL, sbs);
 814         if (result)
 815                 goto end;
 816 #endif
 817         sbs->charger.name = "sbs-charger";
 818         sbs->charger.type = POWER_SUPPLY_TYPE_MAINS;
 819         sbs->charger.properties = sbs_ac_props;
 820         sbs->charger.num_properties = ARRAY_SIZE(sbs_ac_props);
 821         sbs->charger.get_property = sbs_get_ac_property;
 822         power_supply_register(&sbs->device->dev, &sbs->charger);
 823         printk(KERN_INFO PREFIX "%s [%s]: AC Adapter [%s] (%s)\n",
 824                ACPI_SBS_DEVICE_NAME, acpi_device_bid(sbs->device),
 825                ACPI_AC_DIR_NAME, sbs->charger_present ? "on-line" : "off-line");
 826       end:
 827         return result;
 828 }
 829
 830 static void acpi_charger_remove(struct acpi_sbs *sbs)
 831 {
 832         if (sbs->charger.dev)
 833                 power_supply_unregister(&sbs->charger);
 834 #ifdef CONFIG_ACPI_PROCFS
 835         if (sbs->charger_entry)
 836                 acpi_sbs_remove_fs(&sbs->charger_entry, acpi_ac_dir);
 837 #endif
 838 }
 839
 840 void acpi_sbs_callback(void *context)
 841 {
 842         int id;
 843         struct acpi_sbs *sbs = context;
 844         struct acpi_battery *bat;
 845         u8 saved_charger_state = sbs->charger_present;
 846         u8 saved_battery_state;
 847         acpi_ac_get_present(sbs);
 848         if (sbs->charger_present != saved_charger_state) {
 849 #ifdef CONFIG_ACPI_PROC_EVENT
 850                 acpi_bus_generate_proc_event4(ACPI_AC_CLASS, ACPI_AC_DIR_NAME,
 851                                               ACPI_SBS_NOTIFY_STATUS,
 852                                               sbs->charger_present);
 853 #endif
 854                 kobject_uevent(&sbs->charger.dev->kobj, KOBJ_CHANGE);
 855         }
 856         if (sbs->manager_present) {
 857                 for (id = 0; id < MAX_SBS_BAT; ++id) {
 858                         if (!(sbs->batteries_supported & (1 << id)))
 859                                 continue;
 860                         bat = &sbs->battery[id];
 861                         saved_battery_state = bat->present;
 862                         acpi_battery_read(bat);
 863                         if (saved_battery_state == bat->present)
 864                                 continue;
 865 #ifdef CONFIG_ACPI_PROC_EVENT
 866                         acpi_bus_generate_proc_event4(ACPI_BATTERY_CLASS,
 867                                                       bat->name,
 868                                                       ACPI_SBS_NOTIFY_STATUS,
 869                                                       bat->present);
 870 #endif
 871                         kobject_uevent(&bat->bat.dev->kobj, KOBJ_CHANGE);
 872                 }
 873         }
 874 }
 875
 876 static int acpi_sbs_remove(struct acpi_device *device, int type);
 877
 878 static int acpi_sbs_add(struct acpi_device *device)
 879 {
 880         struct acpi_sbs *sbs;
 881         int result = 0;
 882         int id;
 883
 884         sbs = kzalloc(sizeof(struct acpi_sbs), GFP_KERNEL);
 885         if (!sbs) {
 886                 result = -ENOMEM;
 887                 goto end;
 888         }
 889
 890         mutex_init(&sbs->lock);
 891
 892         sbs->hc = acpi_driver_data(device->parent);
 893         sbs->device = device;
 894         strcpy(acpi_device_name(device), ACPI_SBS_DEVICE_NAME);
 895         strcpy(acpi_device_class(device), ACPI_SBS_CLASS);
 896         acpi_driver_data(device) = sbs;
 897
 898         result = acpi_charger_add(sbs);
 899         if (result)
 900                 goto end;
 901
 902         result = acpi_manager_get_info(sbs);
 903         if (!result) {
 904                 sbs->manager_present = 1;
 905                 for (id = 0; id < MAX_SBS_BAT; ++id)
 906                         if ((sbs->batteries_supported & (1 << id)))
 907                                 acpi_battery_add(sbs, id);
 908         } else
 909                 acpi_battery_add(sbs, 0);
 910         acpi_smbus_register_callback(sbs->hc, acpi_sbs_callback, sbs);
 911       end:
 912         if (result)
 913                 acpi_sbs_remove(device, 0);
 914         return result;
 915 }
 916
 917 static int acpi_sbs_remove(struct acpi_device *device, int type)
 918 {
 919         struct acpi_sbs *sbs;
 920         int id;
 921
 922         if (!device)
 923                 return -EINVAL;
 924         sbs = acpi_driver_data(device);
 925         if (!sbs)
 926                 return -EINVAL;
 927         mutex_lock(&sbs->lock);
 928         acpi_smbus_unregister_callback(sbs->hc);
 929         for (id = 0; id < MAX_SBS_BAT; ++id)
 930                 acpi_battery_remove(sbs, id);
 931         acpi_charger_remove(sbs);
 932         mutex_unlock(&sbs->lock);
 933         mutex_destroy(&sbs->lock);
 934         kfree(sbs);
 935         return 0;
 936 }
 937
 938 static void acpi_sbs_rmdirs(void)
 939 {
 940 #ifdef CONFIG_ACPI_PROCFS
 941         if (acpi_ac_dir) {
 942                 acpi_unlock_ac_dir(acpi_ac_dir);
 943                 acpi_ac_dir = NULL;
 944         }
 945         if (acpi_battery_dir) {
 946                 acpi_unlock_battery_dir(acpi_battery_dir);
 947                 acpi_battery_dir = NULL;
 948         }
 949 #endif
 950 }
 951
 952 static int acpi_sbs_resume(struct acpi_device *device)
 953 {
 954         struct acpi_sbs *sbs;
 955         if (!device)
 956                 return -EINVAL;
 957         sbs = device->driver_data;
 958         acpi_sbs_callback(sbs);
 959         return 0;
 960 }
 961
 962 static struct acpi_driver acpi_sbs_driver = {
 963         .name = "sbs",
 964         .class = ACPI_SBS_CLASS,
 965         .ids = sbs_device_ids,
 966         .ops = {
 967                 .add = acpi_sbs_add,
 968                 .remove = acpi_sbs_remove,
 969                 .resume = acpi_sbs_resume,
 970                 },
 971 };
 972
 973 static int __init acpi_sbs_init(void)
 974 {
 975         int result = 0;
 976
 977         if (acpi_disabled)
 978                 return -ENODEV;
 979 #ifdef CONFIG_ACPI_PROCFS
 980         acpi_ac_dir = acpi_lock_ac_dir();
 981         if (!acpi_ac_dir)
 982                 return -ENODEV;
 983         acpi_battery_dir = acpi_lock_battery_dir();
 984         if (!acpi_battery_dir) {
 985                 acpi_sbs_rmdirs();
 986                 return -ENODEV;
 987         }
 988 #endif
 989         result = acpi_bus_register_driver(&acpi_sbs_driver);
 990         if (result < 0) {
 991                 acpi_sbs_rmdirs();
 992                 return -ENODEV;
 993         }
 994         return 0;
 995 }
 996
 997 static void __exit acpi_sbs_exit(void)
 998 {
 999         acpi_bus_unregister_driver(&acpi_sbs_driver);
1000         acpi_sbs_rmdirs();
1001         return;
1002 }
1003
1004 module_init(acpi_sbs_init);
1005 module_exit(acpi_sbs_exit);