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   1 /*
   2  *  acpi_thermal.c - ACPI Thermal Zone Driver ($Revision: 41 $)
   3  *
   4  *  Copyright (C) 2001, 2002 Andy Grover <andrew.grover@intel.com>
   5  *  Copyright (C) 2001, 2002 Paul Diefenbaugh <paul.s.diefenbaugh@intel.com>
   6  *
   7  * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
   8  *
   9  *  This program is free software; you can redistribute it and/or modify
  10  *  it under the terms of the GNU General Public License as published by
  11  *  the Free Software Foundation; either version 2 of the License, or (at
  12  *  your option) any later version.
  13  *
  14  *  This program is distributed in the hope that it will be useful, but
  15  *  WITHOUT ANY WARRANTY; without even the implied warranty of
  16  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  17  *  General Public License for more details.
  18  *
  19  *  You should have received a copy of the GNU General Public License along
  20  *  with this program; if not, write to the Free Software Foundation, Inc.,
  21  *  59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
  22  *
  23  * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
  24  *
  25  *  This driver fully implements the ACPI thermal policy as described in the
  26  *  ACPI 2.0 Specification.
  27  *
  28  *  TBD: 1. Implement passive cooling hysteresis.
  29  *       2. Enhance passive cooling (CPU) states/limit interface to support
  30  *          concepts of 'multiple limiters', upper/lower limits, etc.
  31  *
  32  */
  33
  34 #include <linux/kernel.h>
  35 #include <linux/module.h>
  36 #include <linux/dmi.h>
  37 #include <linux/init.h>
  38 #include <linux/types.h>
  39 #include <linux/proc_fs.h>
  40 #include <linux/jiffies.h>
  41 #include <linux/kmod.h>
  42 #include <linux/seq_file.h>
  43 #include <linux/reboot.h>
  44 #include <asm/uaccess.h>
  45 #include <linux/thermal.h>
  46 #include <acpi/acpi_bus.h>
  47 #include <acpi/acpi_drivers.h>
  48
  49 #define ACPI_THERMAL_CLASS              "thermal_zone"
  50 #define ACPI_THERMAL_DEVICE_NAME        "Thermal Zone"
  51 #define ACPI_THERMAL_FILE_STATE         "state"
  52 #define ACPI_THERMAL_FILE_TEMPERATURE   "temperature"
  53 #define ACPI_THERMAL_FILE_TRIP_POINTS   "trip_points"
  54 #define ACPI_THERMAL_FILE_COOLING_MODE  "cooling_mode"
  55 #define ACPI_THERMAL_FILE_POLLING_FREQ  "polling_frequency"
  56 #define ACPI_THERMAL_NOTIFY_TEMPERATURE 0x80
  57 #define ACPI_THERMAL_NOTIFY_THRESHOLDS  0x81
  58 #define ACPI_THERMAL_NOTIFY_DEVICES     0x82
  59 #define ACPI_THERMAL_NOTIFY_CRITICAL    0xF0
  60 #define ACPI_THERMAL_NOTIFY_HOT         0xF1
  61 #define ACPI_THERMAL_MODE_ACTIVE        0x00
  62
  63 #define ACPI_THERMAL_MAX_ACTIVE 10
  64 #define ACPI_THERMAL_MAX_LIMIT_STR_LEN 65
  65
  66 #define _COMPONENT              ACPI_THERMAL_COMPONENT
  67 ACPI_MODULE_NAME("thermal");
  68
  69 MODULE_AUTHOR("Paul Diefenbaugh");
  70 MODULE_DESCRIPTION("ACPI Thermal Zone Driver");
  71 MODULE_LICENSE("GPL");
  72
  73 static int act;
  74 module_param(act, int, 0644);
  75 MODULE_PARM_DESC(act, "Disable or override all lowest active trip points.");
  76
  77 static int crt;
  78 module_param(crt, int, 0644);
  79 MODULE_PARM_DESC(crt, "Disable or lower all critical trip points.");
  80
  81 static int tzp;
  82 module_param(tzp, int, 0444);
  83 MODULE_PARM_DESC(tzp, "Thermal zone polling frequency, in 1/10 seconds.");
  84
  85 static int nocrt;
  86 module_param(nocrt, int, 0);
  87 MODULE_PARM_DESC(nocrt, "Set to take no action upon ACPI thermal zone critical trips points.");
  88
  89 static int off;
  90 module_param(off, int, 0);
  91 MODULE_PARM_DESC(off, "Set to disable ACPI thermal support.");
  92
  93 static int psv;
  94 module_param(psv, int, 0644);
  95 MODULE_PARM_DESC(psv, "Disable or override all passive trip points.");
  96
  97 static int acpi_thermal_add(struct acpi_device *device);
  98 static int acpi_thermal_remove(struct acpi_device *device, int type);
  99 static int acpi_thermal_resume(struct acpi_device *device);
 100 static int acpi_thermal_state_open_fs(struct inode *inode, struct file *file);
 101 static int acpi_thermal_temp_open_fs(struct inode *inode, struct file *file);
 102 static int acpi_thermal_trip_open_fs(struct inode *inode, struct file *file);
 103 static int acpi_thermal_cooling_open_fs(struct inode *inode, struct file *file);
 104 static ssize_t acpi_thermal_write_cooling_mode(struct file *,
 105                                                const char __user *, size_t,
 106                                                loff_t *);
 107 static int acpi_thermal_polling_open_fs(struct inode *inode, struct file *file);
 108 static ssize_t acpi_thermal_write_polling(struct file *, const char __user *,
 109                                           size_t, loff_t *);
 110
 111 static const struct acpi_device_id  thermal_device_ids[] = {
 112         {ACPI_THERMAL_HID, 0},
 113         {"", 0},
 114 };
 115 MODULE_DEVICE_TABLE(acpi, thermal_device_ids);
 116
 117 static struct acpi_driver acpi_thermal_driver = {
 118         .name = "thermal",
 119         .class = ACPI_THERMAL_CLASS,
 120         .ids = thermal_device_ids,
 121         .ops = {
 122                 .add = acpi_thermal_add,
 123                 .remove = acpi_thermal_remove,
 124                 .resume = acpi_thermal_resume,
 125                 },
 126 };
 127
 128 struct acpi_thermal_state {
 129         u8 critical:1;
 130         u8 hot:1;
 131         u8 passive:1;
 132         u8 active:1;
 133         u8 reserved:4;
 134         int active_index;
 135 };
 136
 137 struct acpi_thermal_state_flags {
 138         u8 valid:1;
 139         u8 enabled:1;
 140         u8 reserved:6;
 141 };
 142
 143 struct acpi_thermal_critical {
 144         struct acpi_thermal_state_flags flags;
 145         unsigned long temperature;
 146 };
 147
 148 struct acpi_thermal_hot {
 149         struct acpi_thermal_state_flags flags;
 150         unsigned long temperature;
 151 };
 152
 153 struct acpi_thermal_passive {
 154         struct acpi_thermal_state_flags flags;
 155         unsigned long temperature;
 156         unsigned long tc1;
 157         unsigned long tc2;
 158         unsigned long tsp;
 159         struct acpi_handle_list devices;
 160 };
 161
 162 struct acpi_thermal_active {
 163         struct acpi_thermal_state_flags flags;
 164         unsigned long temperature;
 165         struct acpi_handle_list devices;
 166 };
 167
 168 struct acpi_thermal_trips {
 169         struct acpi_thermal_critical critical;
 170         struct acpi_thermal_hot hot;
 171         struct acpi_thermal_passive passive;
 172         struct acpi_thermal_active active[ACPI_THERMAL_MAX_ACTIVE];
 173 };
 174
 175 struct acpi_thermal_flags {
 176         u8 cooling_mode:1;      /* _SCP */
 177         u8 devices:1;           /* _TZD */
 178         u8 reserved:6;
 179 };
 180
 181 struct acpi_thermal {
 182         struct acpi_device * device;
 183         acpi_bus_id name;
 184         unsigned long temperature;
 185         unsigned long last_temperature;
 186         unsigned long polling_frequency;
 187         volatile u8 zombie;
 188         struct acpi_thermal_flags flags;
 189         struct acpi_thermal_state state;
 190         struct acpi_thermal_trips trips;
 191         struct acpi_handle_list devices;
 192         struct thermal_zone_device *thermal_zone;
 193         int tz_enabled;
 194         struct mutex lock;
 195 };
 196
 197 static const struct file_operations acpi_thermal_state_fops = {
 198         .owner = THIS_MODULE,
 199         .open = acpi_thermal_state_open_fs,
 200         .read = seq_read,
 201         .llseek = seq_lseek,
 202         .release = single_release,
 203 };
 204
 205 static const struct file_operations acpi_thermal_temp_fops = {
 206         .owner = THIS_MODULE,
 207         .open = acpi_thermal_temp_open_fs,
 208         .read = seq_read,
 209         .llseek = seq_lseek,
 210         .release = single_release,
 211 };
 212
 213 static const struct file_operations acpi_thermal_trip_fops = {
 214         .owner = THIS_MODULE,
 215         .open = acpi_thermal_trip_open_fs,
 216         .read = seq_read,
 217         .llseek = seq_lseek,
 218         .release = single_release,
 219 };
 220
 221 static const struct file_operations acpi_thermal_cooling_fops = {
 222         .owner = THIS_MODULE,
 223         .open = acpi_thermal_cooling_open_fs,
 224         .read = seq_read,
 225         .write = acpi_thermal_write_cooling_mode,
 226         .llseek = seq_lseek,
 227         .release = single_release,
 228 };
 229
 230 static const struct file_operations acpi_thermal_polling_fops = {
 231         .owner = THIS_MODULE,
 232         .open = acpi_thermal_polling_open_fs,
 233         .read = seq_read,
 234         .write = acpi_thermal_write_polling,
 235         .llseek = seq_lseek,
 236         .release = single_release,
 237 };
 238
 239 /* --------------------------------------------------------------------------
 240                              Thermal Zone Management
 241    -------------------------------------------------------------------------- */
 242
 243 static int acpi_thermal_get_temperature(struct acpi_thermal *tz)
 244 {
 245         acpi_status status = AE_OK;
 246         unsigned long long tmp;
 247
 248         if (!tz)
 249                 return -EINVAL;
 250
 251         tz->last_temperature = tz->temperature;
 252
 253         status = acpi_evaluate_integer(tz->device->handle, "_TMP", NULL, &tmp);
 254         if (ACPI_FAILURE(status))
 255                 return -ENODEV;
 256
 257         tz->temperature = tmp;
 258         ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Temperature is %lu dK\n",
 259                           tz->temperature));
 260
 261         return 0;
 262 }
 263
 264 static int acpi_thermal_get_polling_frequency(struct acpi_thermal *tz)
 265 {
 266         acpi_status status = AE_OK;
 267         unsigned long long tmp;
 268
 269         if (!tz)
 270                 return -EINVAL;
 271
 272         status = acpi_evaluate_integer(tz->device->handle, "_TZP", NULL, &tmp);
 273         if (ACPI_FAILURE(status))
 274                 return -ENODEV;
 275
 276         tz->polling_frequency = tmp;
 277         ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Polling frequency is %lu dS\n",
 278                           tz->polling_frequency));
 279
 280         return 0;
 281 }
 282
 283 static int acpi_thermal_set_polling(struct acpi_thermal *tz, int seconds)
 284 {
 285
 286         if (!tz)
 287                 return -EINVAL;
 288
 289         tz->polling_frequency = seconds * 10;   /* Convert value to deci-seconds */
 290
 291         tz->thermal_zone->polling_delay = seconds * 1000;
 292
 293         if (tz->tz_enabled)
 294                 thermal_zone_device_update(tz->thermal_zone);
 295
 296         ACPI_DEBUG_PRINT((ACPI_DB_INFO,
 297                           "Polling frequency set to %lu seconds\n",
 298                           tz->polling_frequency/10));
 299
 300         return 0;
 301 }
 302
 303 static int acpi_thermal_set_cooling_mode(struct acpi_thermal *tz, int mode)
 304 {
 305         acpi_status status = AE_OK;
 306         union acpi_object arg0 = { ACPI_TYPE_INTEGER };
 307         struct acpi_object_list arg_list = { 1, &arg0 };
 308         acpi_handle handle = NULL;
 309
 310
 311         if (!tz)
 312                 return -EINVAL;
 313
 314         status = acpi_get_handle(tz->device->handle, "_SCP", &handle);
 315         if (ACPI_FAILURE(status)) {
 316                 ACPI_DEBUG_PRINT((ACPI_DB_INFO, "_SCP not present\n"));
 317                 return -ENODEV;
 318         }
 319
 320         arg0.integer.value = mode;
 321
 322         status = acpi_evaluate_object(handle, NULL, &arg_list, NULL);
 323         if (ACPI_FAILURE(status))
 324                 return -ENODEV;
 325
 326         return 0;
 327 }
 328
 329 #define ACPI_TRIPS_CRITICAL     0x01
 330 #define ACPI_TRIPS_HOT          0x02
 331 #define ACPI_TRIPS_PASSIVE      0x04
 332 #define ACPI_TRIPS_ACTIVE       0x08
 333 #define ACPI_TRIPS_DEVICES      0x10
 334
 335 #define ACPI_TRIPS_REFRESH_THRESHOLDS   (ACPI_TRIPS_PASSIVE | ACPI_TRIPS_ACTIVE)
 336 #define ACPI_TRIPS_REFRESH_DEVICES      ACPI_TRIPS_DEVICES
 337
 338 #define ACPI_TRIPS_INIT      (ACPI_TRIPS_CRITICAL | ACPI_TRIPS_HOT |    \
 339                               ACPI_TRIPS_PASSIVE | ACPI_TRIPS_ACTIVE |  \
 340                               ACPI_TRIPS_DEVICES)
 341
 342 /*
 343  * This exception is thrown out in two cases:
 344  * 1.An invalid trip point becomes invalid or a valid trip point becomes invalid
 345  *   when re-evaluating the AML code.
 346  * 2.TODO: Devices listed in _PSL, _ALx, _TZD may change.
 347  *   We need to re-bind the cooling devices of a thermal zone when this occurs.
 348  */
 349 #define ACPI_THERMAL_TRIPS_EXCEPTION(flags, str)        \
 350 do {    \
 351         if (flags != ACPI_TRIPS_INIT)   \
 352                 ACPI_EXCEPTION((AE_INFO, AE_ERROR,      \
 353                 "ACPI thermal trip point %s changed\n"  \
 354                 "Please send acpidump to linux-acpi@vger.kernel.org\n", str)); \
 355 } while (0)
 356
 357 static int acpi_thermal_trips_update(struct acpi_thermal *tz, int flag)
 358 {
 359         acpi_status status = AE_OK;
 360         unsigned long long tmp;
 361         struct acpi_handle_list devices;
 362         int valid = 0;
 363         int i;
 364
 365         /* Critical Shutdown (required) */
 366         if (flag & ACPI_TRIPS_CRITICAL) {
 367                 status = acpi_evaluate_integer(tz->device->handle,
 368                                 "_CRT", NULL, &tmp);
 369                 tz->trips.critical.temperature = tmp;
 370                 /*
 371                  * Treat freezing temperatures as invalid as well; some
 372                  * BIOSes return really low values and cause reboots at startup.
 373                  * Below zero (Celcius) values clearly aren't right for sure..
 374                  * ... so lets discard those as invalid.
 375                  */
 376                 if (ACPI_FAILURE(status) ||
 377                                 tz->trips.critical.temperature <= 2732) {
 378                         tz->trips.critical.flags.valid = 0;
 379                         ACPI_EXCEPTION((AE_INFO, status,
 380                                         "No or invalid critical threshold"));
 381                         return -ENODEV;
 382                 } else {
 383                         tz->trips.critical.flags.valid = 1;
 384                         ACPI_DEBUG_PRINT((ACPI_DB_INFO,
 385                                         "Found critical threshold [%lu]\n",
 386                                         tz->trips.critical.temperature));
 387                 }
 388                 if (tz->trips.critical.flags.valid == 1) {
 389                         if (crt == -1) {
 390                                 tz->trips.critical.flags.valid = 0;
 391                         } else if (crt > 0) {
 392                                 unsigned long crt_k = CELSIUS_TO_KELVIN(crt);
 393                                 /*
 394                                  * Allow override critical threshold
 395                                  */
 396                                 if (crt_k > tz->trips.critical.temperature)
 397                                         printk(KERN_WARNING PREFIX
 398                                                 "Critical threshold %d C\n", crt);
 399                                 tz->trips.critical.temperature = crt_k;
 400                         }
 401                 }
 402         }
 403
 404         /* Critical Sleep (optional) */
 405         if (flag & ACPI_TRIPS_HOT) {
 406                 status = acpi_evaluate_integer(tz->device->handle,
 407                                 "_HOT", NULL, &tmp);
 408                 if (ACPI_FAILURE(status)) {
 409                         tz->trips.hot.flags.valid = 0;
 410                         ACPI_DEBUG_PRINT((ACPI_DB_INFO,
 411                                         "No hot threshold\n"));
 412                 } else {
 413                         tz->trips.hot.temperature = tmp;
 414                         tz->trips.hot.flags.valid = 1;
 415                         ACPI_DEBUG_PRINT((ACPI_DB_INFO,
 416                                         "Found hot threshold [%lu]\n",
 417                                         tz->trips.critical.temperature));
 418                 }
 419         }
 420
 421         /* Passive (optional) */
 422         if (((flag & ACPI_TRIPS_PASSIVE) && tz->trips.passive.flags.valid) ||
 423                 (flag == ACPI_TRIPS_INIT)) {
 424                 valid = tz->trips.passive.flags.valid;
 425                 if (psv == -1) {
 426                         status = AE_SUPPORT;
 427                 } else if (psv > 0) {
 428                         tmp = CELSIUS_TO_KELVIN(psv);
 429                         status = AE_OK;
 430                 } else {
 431                         status = acpi_evaluate_integer(tz->device->handle,
 432                                 "_PSV", NULL, &tmp);
 433                 }
 434
 435                 if (ACPI_FAILURE(status))
 436                         tz->trips.passive.flags.valid = 0;
 437                 else {
 438                         tz->trips.passive.temperature = tmp;
 439                         tz->trips.passive.flags.valid = 1;
 440                         if (flag == ACPI_TRIPS_INIT) {
 441                                 status = acpi_evaluate_integer(
 442                                                 tz->device->handle, "_TC1",
 443                                                 NULL, &tmp);
 444                                 if (ACPI_FAILURE(status))
 445                                         tz->trips.passive.flags.valid = 0;
 446                                 else
 447                                         tz->trips.passive.tc1 = tmp;
 448                                 status = acpi_evaluate_integer(
 449                                                 tz->device->handle, "_TC2",
 450                                                 NULL, &tmp);
 451                                 if (ACPI_FAILURE(status))
 452                                         tz->trips.passive.flags.valid = 0;
 453                                 else
 454                                         tz->trips.passive.tc2 = tmp;
 455                                 status = acpi_evaluate_integer(
 456                                                 tz->device->handle, "_TSP",
 457                                                 NULL, &tmp);
 458                                 if (ACPI_FAILURE(status))
 459                                         tz->trips.passive.flags.valid = 0;
 460                                 else
 461                                         tz->trips.passive.tsp = tmp;
 462                         }
 463                 }
 464         }
 465         if ((flag & ACPI_TRIPS_DEVICES) && tz->trips.passive.flags.valid) {
 466                 memset(&devices, 0, sizeof(struct acpi_handle_list));
 467                 status = acpi_evaluate_reference(tz->device->handle, "_PSL",
 468                                                         NULL, &devices);
 469                 if (ACPI_FAILURE(status)) {
 470                         printk(KERN_WARNING PREFIX
 471                                 "Invalid passive threshold\n");
 472                         tz->trips.passive.flags.valid = 0;
 473                 }
 474                 else
 475                         tz->trips.passive.flags.valid = 1;
 476
 477                 if (memcmp(&tz->trips.passive.devices, &devices,
 478                                 sizeof(struct acpi_handle_list))) {
 479                         memcpy(&tz->trips.passive.devices, &devices,
 480                                 sizeof(struct acpi_handle_list));
 481                         ACPI_THERMAL_TRIPS_EXCEPTION(flag, "device");
 482                 }
 483         }
 484         if ((flag & ACPI_TRIPS_PASSIVE) || (flag & ACPI_TRIPS_DEVICES)) {
 485                 if (valid != tz->trips.passive.flags.valid)
 486                                 ACPI_THERMAL_TRIPS_EXCEPTION(flag, "state");
 487         }
 488
 489         /* Active (optional) */
 490         for (i = 0; i < ACPI_THERMAL_MAX_ACTIVE; i++) {
 491                 char name[5] = { '_', 'A', 'C', ('0' + i), '\0' };
 492                 valid = tz->trips.active[i].flags.valid;
 493
 494                 if (act == -1)
 495                         break; /* disable all active trip points */
 496
 497                 if ((flag == ACPI_TRIPS_INIT) || ((flag & ACPI_TRIPS_ACTIVE) &&
 498                         tz->trips.active[i].flags.valid)) {
 499                         status = acpi_evaluate_integer(tz->device->handle,
 500                                                         name, NULL, &tmp);
 501                         if (ACPI_FAILURE(status)) {
 502                                 tz->trips.active[i].flags.valid = 0;
 503                                 if (i == 0)
 504                                         break;
 505                                 if (act <= 0)
 506                                         break;
 507                                 if (i == 1)
 508                                         tz->trips.active[0].temperature =
 509                                                 CELSIUS_TO_KELVIN(act);
 510                                 else
 511                                         /*
 512                                          * Don't allow override higher than
 513                                          * the next higher trip point
 514                                          */
 515                                         tz->trips.active[i - 1].temperature =
 516                                                 (tz->trips.active[i - 2].temperature <
 517                                                 CELSIUS_TO_KELVIN(act) ?
 518                                                 tz->trips.active[i - 2].temperature :
 519                                                 CELSIUS_TO_KELVIN(act));
 520                                 break;
 521                         } else {
 522                                 tz->trips.active[i].temperature = tmp;
 523                                 tz->trips.active[i].flags.valid = 1;
 524                         }
 525                 }
 526
 527                 name[2] = 'L';
 528                 if ((flag & ACPI_TRIPS_DEVICES) && tz->trips.active[i].flags.valid ) {
 529                         memset(&devices, 0, sizeof(struct acpi_handle_list));
 530                         status = acpi_evaluate_reference(tz->device->handle,
 531                                                 name, NULL, &devices);
 532                         if (ACPI_FAILURE(status)) {
 533                                 printk(KERN_WARNING PREFIX
 534                                         "Invalid active%d threshold\n", i);
 535                                 tz->trips.active[i].flags.valid = 0;
 536                         }
 537                         else
 538                                 tz->trips.active[i].flags.valid = 1;
 539
 540                         if (memcmp(&tz->trips.active[i].devices, &devices,
 541                                         sizeof(struct acpi_handle_list))) {
 542                                 memcpy(&tz->trips.active[i].devices, &devices,
 543                                         sizeof(struct acpi_handle_list));
 544                                 ACPI_THERMAL_TRIPS_EXCEPTION(flag, "device");
 545                         }
 546                 }
 547                 if ((flag & ACPI_TRIPS_ACTIVE) || (flag & ACPI_TRIPS_DEVICES))
 548                         if (valid != tz->trips.active[i].flags.valid)
 549                                 ACPI_THERMAL_TRIPS_EXCEPTION(flag, "state");
 550
 551                 if (!tz->trips.active[i].flags.valid)
 552                         break;
 553         }
 554
 555         if (flag & ACPI_TRIPS_DEVICES) {
 556                 memset(&devices, 0, sizeof(struct acpi_handle_list));
 557                 status = acpi_evaluate_reference(tz->device->handle, "_TZD",
 558                                                 NULL, &devices);
 559                 if (memcmp(&tz->devices, &devices,
 560                                 sizeof(struct acpi_handle_list))) {
 561                         memcpy(&tz->devices, &devices,
 562                                 sizeof(struct acpi_handle_list));
 563                         ACPI_THERMAL_TRIPS_EXCEPTION(flag, "device");
 564                 }
 565         }
 566
 567         return 0;
 568 }
 569
 570 static int acpi_thermal_get_trip_points(struct acpi_thermal *tz)
 571 {
 572         return acpi_thermal_trips_update(tz, ACPI_TRIPS_INIT);
 573 }
 574
 575 static void acpi_thermal_check(void *data)
 576 {
 577         struct acpi_thermal *tz = data;
 578
 579         thermal_zone_device_update(tz->thermal_zone);
 580 }
 581
 582 /* sys I/F for generic thermal sysfs support */
 583 #define KELVIN_TO_MILLICELSIUS(t) (t * 100 - 273200)
 584
 585 static int thermal_get_temp(struct thermal_zone_device *thermal,
 586                             unsigned long *temp)
 587 {
 588         struct acpi_thermal *tz = thermal->devdata;
 589         int result;
 590
 591         if (!tz)
 592                 return -EINVAL;
 593
 594         result = acpi_thermal_get_temperature(tz);
 595         if (result)
 596                 return result;
 597
 598         *temp = KELVIN_TO_MILLICELSIUS(tz->temperature);
 599         return 0;
 600 }
 601
 602 static const char enabled[] = "kernel";
 603 static const char disabled[] = "user";
 604 static int thermal_get_mode(struct thermal_zone_device *thermal,
 605                                 enum thermal_device_mode *mode)
 606 {
 607         struct acpi_thermal *tz = thermal->devdata;
 608
 609         if (!tz)
 610                 return -EINVAL;
 611
 612         *mode = tz->tz_enabled ? THERMAL_DEVICE_ENABLED :
 613                 THERMAL_DEVICE_DISABLED;
 614
 615         return 0;
 616 }
 617
 618 static int thermal_set_mode(struct thermal_zone_device *thermal,
 619                                 enum thermal_device_mode mode)
 620 {
 621         struct acpi_thermal *tz = thermal->devdata;
 622         int enable;
 623
 624         if (!tz)
 625                 return -EINVAL;
 626
 627         /*
 628          * enable/disable thermal management from ACPI thermal driver
 629          */
 630         if (mode == THERMAL_DEVICE_ENABLED)
 631                 enable = 1;
 632         else if (mode == THERMAL_DEVICE_DISABLED)
 633                 enable = 0;
 634         else
 635                 return -EINVAL;
 636
 637         if (enable != tz->tz_enabled) {
 638                 tz->tz_enabled = enable;
 639                 ACPI_DEBUG_PRINT((ACPI_DB_INFO,
 640                         "%s ACPI thermal control\n",
 641                         tz->tz_enabled ? enabled : disabled));
 642                 acpi_thermal_check(tz);
 643         }
 644         return 0;
 645 }
 646
 647 static int thermal_get_trip_type(struct thermal_zone_device *thermal,
 648                                  int trip, enum thermal_trip_type *type)
 649 {
 650         struct acpi_thermal *tz = thermal->devdata;
 651         int i;
 652
 653         if (!tz || trip < 0)
 654                 return -EINVAL;
 655
 656         if (tz->trips.critical.flags.valid) {
 657                 if (!trip) {
 658                         *type = THERMAL_TRIP_CRITICAL;
 659                         return 0;
 660                 }
 661                 trip--;
 662         }
 663
 664         if (tz->trips.hot.flags.valid) {
 665                 if (!trip) {
 666                         *type = THERMAL_TRIP_HOT;
 667                         return 0;
 668                 }
 669                 trip--;
 670         }
 671
 672         if (tz->trips.passive.flags.valid) {
 673                 if (!trip) {
 674                         *type = THERMAL_TRIP_PASSIVE;
 675                         return 0;
 676                 }
 677                 trip--;
 678         }
 679
 680         for (i = 0; i < ACPI_THERMAL_MAX_ACTIVE &&
 681                 tz->trips.active[i].flags.valid; i++) {
 682                 if (!trip) {
 683                         *type = THERMAL_TRIP_ACTIVE;
 684                         return 0;
 685                 }
 686                 trip--;
 687         }
 688
 689         return -EINVAL;
 690 }
 691
 692 static int thermal_get_trip_temp(struct thermal_zone_device *thermal,
 693                                  int trip, unsigned long *temp)
 694 {
 695         struct acpi_thermal *tz = thermal->devdata;
 696         int i;
 697
 698         if (!tz || trip < 0)
 699                 return -EINVAL;
 700
 701         if (tz->trips.critical.flags.valid) {
 702                 if (!trip) {
 703                         *temp = KELVIN_TO_MILLICELSIUS(
 704                                 tz->trips.critical.temperature);
 705                         return 0;
 706                 }
 707                 trip--;
 708         }
 709
 710         if (tz->trips.hot.flags.valid) {
 711                 if (!trip) {
 712                         *temp = KELVIN_TO_MILLICELSIUS(
 713                                 tz->trips.hot.temperature);
 714                         return 0;
 715                 }
 716                 trip--;
 717         }
 718
 719         if (tz->trips.passive.flags.valid) {
 720                 if (!trip) {
 721                         *temp = KELVIN_TO_MILLICELSIUS(
 722                                 tz->trips.passive.temperature);
 723                         return 0;
 724                 }
 725                 trip--;
 726         }
 727
 728         for (i = 0; i < ACPI_THERMAL_MAX_ACTIVE &&
 729                 tz->trips.active[i].flags.valid; i++) {
 730                 if (!trip) {
 731                         *temp = KELVIN_TO_MILLICELSIUS(
 732                                 tz->trips.active[i].temperature);
 733                         return 0;
 734                 }
 735                 trip--;
 736         }
 737
 738         return -EINVAL;
 739 }
 740
 741 static int thermal_get_crit_temp(struct thermal_zone_device *thermal,
 742                                 unsigned long *temperature) {
 743         struct acpi_thermal *tz = thermal->devdata;
 744
 745         if (tz->trips.critical.flags.valid) {
 746                 *temperature = KELVIN_TO_MILLICELSIUS(
 747                                 tz->trips.critical.temperature);
 748                 return 0;
 749         } else
 750                 return -EINVAL;
 751 }
 752
 753 static int thermal_notify(struct thermal_zone_device *thermal, int trip,
 754                            enum thermal_trip_type trip_type)
 755 {
 756         u8 type = 0;
 757         struct acpi_thermal *tz = thermal->devdata;
 758
 759         if (trip_type == THERMAL_TRIP_CRITICAL)
 760                 type = ACPI_THERMAL_NOTIFY_CRITICAL;
 761         else if (trip_type == THERMAL_TRIP_HOT)
 762                 type = ACPI_THERMAL_NOTIFY_HOT;
 763         else
 764                 return 0;
 765
 766         acpi_bus_generate_proc_event(tz->device, type, 1);
 767         acpi_bus_generate_netlink_event(tz->device->pnp.device_class,
 768                                         tz->device->dev.bus_id, type, 1);
 769
 770         if (trip_type == THERMAL_TRIP_CRITICAL && nocrt)
 771                 return 1;
 772
 773         return 0;
 774 }
 775
 776 typedef int (*cb)(struct thermal_zone_device *, int,
 777                   struct thermal_cooling_device *);
 778 static int acpi_thermal_cooling_device_cb(struct thermal_zone_device *thermal,
 779                                         struct thermal_cooling_device *cdev,
 780                                         cb action)
 781 {
 782         struct acpi_device *device = cdev->devdata;
 783         struct acpi_thermal *tz = thermal->devdata;
 784         struct acpi_device *dev;
 785         acpi_status status;
 786         acpi_handle handle;
 787         int i;
 788         int j;
 789         int trip = -1;
 790         int result = 0;
 791
 792         if (tz->trips.critical.flags.valid)
 793                 trip++;
 794
 795         if (tz->trips.hot.flags.valid)
 796                 trip++;
 797
 798         if (tz->trips.passive.flags.valid) {
 799                 trip++;
 800                 for (i = 0; i < tz->trips.passive.devices.count;
 801                     i++) {
 802                         handle = tz->trips.passive.devices.handles[i];
 803                         status = acpi_bus_get_device(handle, &dev);
 804                         if (ACPI_SUCCESS(status) && (dev == device)) {
 805                                 result = action(thermal, trip, cdev);
 806                                 if (result)
 807                                         goto failed;
 808                         }
 809                 }
 810         }
 811
 812         for (i = 0; i < ACPI_THERMAL_MAX_ACTIVE; i++) {
 813                 if (!tz->trips.active[i].flags.valid)
 814                         break;
 815                 trip++;
 816                 for (j = 0;
 817                     j < tz->trips.active[i].devices.count;
 818                     j++) {
 819                         handle = tz->trips.active[i].devices.handles[j];
 820                         status = acpi_bus_get_device(handle, &dev);
 821                         if (ACPI_SUCCESS(status) && (dev == device)) {
 822                                 result = action(thermal, trip, cdev);
 823                                 if (result)
 824                                         goto failed;
 825                         }
 826                 }
 827         }
 828
 829         for (i = 0; i < tz->devices.count; i++) {
 830                 handle = tz->devices.handles[i];
 831                 status = acpi_bus_get_device(handle, &dev);
 832                 if (ACPI_SUCCESS(status) && (dev == device)) {
 833                         result = action(thermal, -1, cdev);
 834                         if (result)
 835                                 goto failed;
 836                 }
 837         }
 838
 839 failed:
 840         return result;
 841 }
 842
 843 static int
 844 acpi_thermal_bind_cooling_device(struct thermal_zone_device *thermal,
 845                                         struct thermal_cooling_device *cdev)
 846 {
 847         return acpi_thermal_cooling_device_cb(thermal, cdev,
 848                                 thermal_zone_bind_cooling_device);
 849 }
 850
 851 static int
 852 acpi_thermal_unbind_cooling_device(struct thermal_zone_device *thermal,
 853                                         struct thermal_cooling_device *cdev)
 854 {
 855         return acpi_thermal_cooling_device_cb(thermal, cdev,
 856                                 thermal_zone_unbind_cooling_device);
 857 }
 858
 859 static struct thermal_zone_device_ops acpi_thermal_zone_ops = {
 860         .bind = acpi_thermal_bind_cooling_device,
 861         .unbind = acpi_thermal_unbind_cooling_device,
 862         .get_temp = thermal_get_temp,
 863         .get_mode = thermal_get_mode,
 864         .set_mode = thermal_set_mode,
 865         .get_trip_type = thermal_get_trip_type,
 866         .get_trip_temp = thermal_get_trip_temp,
 867         .get_crit_temp = thermal_get_crit_temp,
 868         .notify = thermal_notify,
 869 };
 870
 871 static int acpi_thermal_register_thermal_zone(struct acpi_thermal *tz)
 872 {
 873         int trips = 0;
 874         int result;
 875         acpi_status status;
 876         int i;
 877
 878         if (tz->trips.critical.flags.valid)
 879                 trips++;
 880
 881         if (tz->trips.hot.flags.valid)
 882                 trips++;
 883
 884         if (tz->trips.passive.flags.valid)
 885                 trips++;
 886
 887         for (i = 0; i < ACPI_THERMAL_MAX_ACTIVE &&
 888                         tz->trips.active[i].flags.valid; i++, trips++);
 889
 890         if (tz->trips.passive.flags.valid)
 891                 tz->thermal_zone =
 892                         thermal_zone_device_register("acpitz", trips, tz,
 893                                                      &acpi_thermal_zone_ops,
 894                                                      tz->trips.passive.tc1,
 895                                                      tz->trips.passive.tc2,
 896                                                      tz->trips.passive.tsp*100,
 897                                                      tz->polling_frequency*100);
 898         else
 899                 tz->thermal_zone =
 900                         thermal_zone_device_register("acpitz", trips, tz,
 901                                                      &acpi_thermal_zone_ops,
 902                                                      0, 0, 0,
 903                                                      tz->polling_frequency);
 904         if (IS_ERR(tz->thermal_zone))
 905                 return -ENODEV;
 906
 907         result = sysfs_create_link(&tz->device->dev.kobj,
 908                                    &tz->thermal_zone->device.kobj, "thermal_zone");
 909         if (result)
 910                 return result;
 911
 912         result = sysfs_create_link(&tz->thermal_zone->device.kobj,
 913                                    &tz->device->dev.kobj, "device");
 914         if (result)
 915                 return result;
 916
 917         status = acpi_attach_data(tz->device->handle,
 918                                   acpi_bus_private_data_handler,
 919                                   tz->thermal_zone);
 920         if (ACPI_FAILURE(status)) {
 921                 printk(KERN_ERR PREFIX
 922                                 "Error attaching device data\n");
 923                 return -ENODEV;
 924         }
 925
 926         tz->tz_enabled = 1;
 927
 928         dev_info(&tz->device->dev, "registered as thermal_zone%d\n",
 929                  tz->thermal_zone->id);
 930         return 0;
 931 }
 932
 933 static void acpi_thermal_unregister_thermal_zone(struct acpi_thermal *tz)
 934 {
 935         sysfs_remove_link(&tz->device->dev.kobj, "thermal_zone");
 936         sysfs_remove_link(&tz->thermal_zone->device.kobj, "device");
 937         thermal_zone_device_unregister(tz->thermal_zone);
 938         tz->thermal_zone = NULL;
 939         acpi_detach_data(tz->device->handle, acpi_bus_private_data_handler);
 940 }
 941
 942
 943 /* --------------------------------------------------------------------------
 944                               FS Interface (/proc)
 945    -------------------------------------------------------------------------- */
 946
 947 static struct proc_dir_entry *acpi_thermal_dir;
 948
 949 static int acpi_thermal_state_seq_show(struct seq_file *seq, void *offset)
 950 {
 951         struct acpi_thermal *tz = seq->private;
 952
 953
 954         if (!tz)
 955                 goto end;
 956
 957         seq_puts(seq, "state:                   ");
 958
 959         if (!tz->state.critical && !tz->state.hot && !tz->state.passive
 960             && !tz->state.active)
 961                 seq_puts(seq, "ok\n");
 962         else {
 963                 if (tz->state.critical)
 964                         seq_puts(seq, "critical ");
 965                 if (tz->state.hot)
 966                         seq_puts(seq, "hot ");
 967                 if (tz->state.passive)
 968                         seq_puts(seq, "passive ");
 969                 if (tz->state.active)
 970                         seq_printf(seq, "active[%d]", tz->state.active_index);
 971                 seq_puts(seq, "\n");
 972         }
 973
 974       end:
 975         return 0;
 976 }
 977
 978 static int acpi_thermal_state_open_fs(struct inode *inode, struct file *file)
 979 {
 980         return single_open(file, acpi_thermal_state_seq_show, PDE(inode)->data);
 981 }
 982
 983 static int acpi_thermal_temp_seq_show(struct seq_file *seq, void *offset)
 984 {
 985         int result = 0;
 986         struct acpi_thermal *tz = seq->private;
 987
 988
 989         if (!tz)
 990                 goto end;
 991
 992         result = acpi_thermal_get_temperature(tz);
 993         if (result)
 994                 goto end;
 995
 996         seq_printf(seq, "temperature:             %ld C\n",
 997                    KELVIN_TO_CELSIUS(tz->temperature));
 998
 999       end:
1000         return 0;
1001 }
1002
1003 static int acpi_thermal_temp_open_fs(struct inode *inode, struct file *file)
1004 {
1005         return single_open(file, acpi_thermal_temp_seq_show, PDE(inode)->data);
1006 }
1007
1008 static int acpi_thermal_trip_seq_show(struct seq_file *seq, void *offset)
1009 {
1010         struct acpi_thermal *tz = seq->private;
1011         struct acpi_device *device;
1012         acpi_status status;
1013
1014         int i = 0;
1015         int j = 0;
1016
1017
1018         if (!tz)
1019                 goto end;
1020
1021         if (tz->trips.critical.flags.valid)
1022                 seq_printf(seq, "critical (S5):           %ld C%s",
1023                            KELVIN_TO_CELSIUS(tz->trips.critical.temperature),
1024                            nocrt ? " <disabled>\n" : "\n");
1025
1026         if (tz->trips.hot.flags.valid)
1027                 seq_printf(seq, "hot (S4):                %ld C%s",
1028                            KELVIN_TO_CELSIUS(tz->trips.hot.temperature),
1029                            nocrt ? " <disabled>\n" : "\n");
1030
1031         if (tz->trips.passive.flags.valid) {
1032                 seq_printf(seq,
1033                            "passive:                 %ld C: tc1=%lu tc2=%lu tsp=%lu devices=",
1034                            KELVIN_TO_CELSIUS(tz->trips.passive.temperature),
1035                            tz->trips.passive.tc1, tz->trips.passive.tc2,
1036                            tz->trips.passive.tsp);
1037                 for (j = 0; j < tz->trips.passive.devices.count; j++) {
1038                         status = acpi_bus_get_device(tz->trips.passive.devices.
1039                                                      handles[j], &device);
1040                         seq_printf(seq, "%4.4s ", status ? "" :
1041                                    acpi_device_bid(device));
1042                 }
1043                 seq_puts(seq, "\n");
1044         }
1045
1046         for (i = 0; i < ACPI_THERMAL_MAX_ACTIVE; i++) {
1047                 if (!(tz->trips.active[i].flags.valid))
1048                         break;
1049                 seq_printf(seq, "active[%d]:               %ld C: devices=",
1050                            i,
1051                            KELVIN_TO_CELSIUS(tz->trips.active[i].temperature));
1052                 for (j = 0; j < tz->trips.active[i].devices.count; j++){
1053                         status = acpi_bus_get_device(tz->trips.active[i].
1054                                                      devices.handles[j],
1055                                                      &device);
1056                         seq_printf(seq, "%4.4s ", status ? "" :
1057                                    acpi_device_bid(device));
1058                 }
1059                 seq_puts(seq, "\n");
1060         }
1061
1062       end:
1063         return 0;
1064 }
1065
1066 static int acpi_thermal_trip_open_fs(struct inode *inode, struct file *file)
1067 {
1068         return single_open(file, acpi_thermal_trip_seq_show, PDE(inode)->data);
1069 }
1070
1071 static int acpi_thermal_cooling_seq_show(struct seq_file *seq, void *offset)
1072 {
1073         struct acpi_thermal *tz = seq->private;
1074
1075
1076         if (!tz)
1077                 goto end;
1078
1079         if (!tz->flags.cooling_mode)
1080                 seq_puts(seq, "<setting not supported>\n");
1081         else
1082                 seq_puts(seq, "0 - Active; 1 - Passive\n");
1083
1084       end:
1085         return 0;
1086 }
1087
1088 static int acpi_thermal_cooling_open_fs(struct inode *inode, struct file *file)
1089 {
1090         return single_open(file, acpi_thermal_cooling_seq_show,
1091                            PDE(inode)->data);
1092 }
1093
1094 static ssize_t
1095 acpi_thermal_write_cooling_mode(struct file *file,
1096                                 const char __user * buffer,
1097                                 size_t count, loff_t * ppos)
1098 {
1099         struct seq_file *m = file->private_data;
1100         struct acpi_thermal *tz = m->private;
1101         int result = 0;
1102         char mode_string[12] = { '\0' };
1103
1104
1105         if (!tz || (count > sizeof(mode_string) - 1))
1106                 return -EINVAL;
1107
1108         if (!tz->flags.cooling_mode)
1109                 return -ENODEV;
1110
1111         if (copy_from_user(mode_string, buffer, count))
1112                 return -EFAULT;
1113
1114         mode_string[count] = '\0';
1115
1116         result = acpi_thermal_set_cooling_mode(tz,
1117                                                simple_strtoul(mode_string, NULL,
1118                                                               0));
1119         if (result)
1120                 return result;
1121
1122         acpi_thermal_check(tz);
1123
1124         return count;
1125 }
1126
1127 static int acpi_thermal_polling_seq_show(struct seq_file *seq, void *offset)
1128 {
1129         struct acpi_thermal *tz = seq->private;
1130
1131
1132         if (!tz)
1133                 goto end;
1134
1135         if (!tz->thermal_zone->polling_delay) {
1136                 seq_puts(seq, "<polling disabled>\n");
1137                 goto end;
1138         }
1139
1140         seq_printf(seq, "polling frequency:       %d seconds\n",
1141                    (tz->thermal_zone->polling_delay / 1000));
1142
1143       end:
1144         return 0;
1145 }
1146
1147 static int acpi_thermal_polling_open_fs(struct inode *inode, struct file *file)
1148 {
1149         return single_open(file, acpi_thermal_polling_seq_show,
1150                            PDE(inode)->data);
1151 }
1152
1153 static ssize_t
1154 acpi_thermal_write_polling(struct file *file,
1155                            const char __user * buffer,
1156                            size_t count, loff_t * ppos)
1157 {
1158         struct seq_file *m = file->private_data;
1159         struct acpi_thermal *tz = m->private;
1160         int result = 0;
1161         char polling_string[12] = { '\0' };
1162         int seconds = 0;
1163
1164
1165         if (!tz || (count > sizeof(polling_string) - 1))
1166                 return -EINVAL;
1167
1168         if (copy_from_user(polling_string, buffer, count))
1169                 return -EFAULT;
1170
1171         polling_string[count] = '\0';
1172
1173         seconds = simple_strtoul(polling_string, NULL, 0);
1174
1175         result = acpi_thermal_set_polling(tz, seconds);
1176         if (result)
1177                 return result;
1178
1179         acpi_thermal_check(tz);
1180
1181         return count;
1182 }
1183
1184 static int acpi_thermal_add_fs(struct acpi_device *device)
1185 {
1186         struct proc_dir_entry *entry = NULL;
1187
1188
1189         if (!acpi_device_dir(device)) {
1190                 acpi_device_dir(device) = proc_mkdir(acpi_device_bid(device),
1191                                                      acpi_thermal_dir);
1192                 if (!acpi_device_dir(device))
1193                         return -ENODEV;
1194                 acpi_device_dir(device)->owner = THIS_MODULE;
1195         }
1196
1197         /* 'state' [R] */
1198         entry = proc_create_data(ACPI_THERMAL_FILE_STATE,
1199                                  S_IRUGO, acpi_device_dir(device),
1200                                  &acpi_thermal_state_fops,
1201                                  acpi_driver_data(device));
1202         if (!entry)
1203                 return -ENODEV;
1204
1205         /* 'temperature' [R] */
1206         entry = proc_create_data(ACPI_THERMAL_FILE_TEMPERATURE,
1207                                  S_IRUGO, acpi_device_dir(device),
1208                                  &acpi_thermal_temp_fops,
1209                                  acpi_driver_data(device));
1210         if (!entry)
1211                 return -ENODEV;
1212
1213         /* 'trip_points' [R] */
1214         entry = proc_create_data(ACPI_THERMAL_FILE_TRIP_POINTS,
1215                                  S_IRUGO,
1216                                  acpi_device_dir(device),
1217                                  &acpi_thermal_trip_fops,
1218                                  acpi_driver_data(device));
1219         if (!entry)
1220                 return -ENODEV;
1221
1222         /* 'cooling_mode' [R/W] */
1223         entry = proc_create_data(ACPI_THERMAL_FILE_COOLING_MODE,
1224                                  S_IFREG | S_IRUGO | S_IWUSR,
1225                                  acpi_device_dir(device),
1226                                  &acpi_thermal_cooling_fops,
1227                                  acpi_driver_data(device));
1228         if (!entry)
1229                 return -ENODEV;
1230
1231         /* 'polling_frequency' [R/W] */
1232         entry = proc_create_data(ACPI_THERMAL_FILE_POLLING_FREQ,
1233                                  S_IFREG | S_IRUGO | S_IWUSR,
1234                                  acpi_device_dir(device),
1235                                  &acpi_thermal_polling_fops,
1236                                  acpi_driver_data(device));
1237         if (!entry)
1238                 return -ENODEV;
1239         return 0;
1240 }
1241
1242 static int acpi_thermal_remove_fs(struct acpi_device *device)
1243 {
1244
1245         if (acpi_device_dir(device)) {
1246                 remove_proc_entry(ACPI_THERMAL_FILE_POLLING_FREQ,
1247                                   acpi_device_dir(device));
1248                 remove_proc_entry(ACPI_THERMAL_FILE_COOLING_MODE,
1249                                   acpi_device_dir(device));
1250                 remove_proc_entry(ACPI_THERMAL_FILE_TRIP_POINTS,
1251                                   acpi_device_dir(device));
1252                 remove_proc_entry(ACPI_THERMAL_FILE_TEMPERATURE,
1253                                   acpi_device_dir(device));
1254                 remove_proc_entry(ACPI_THERMAL_FILE_STATE,
1255                                   acpi_device_dir(device));
1256                 remove_proc_entry(acpi_device_bid(device), acpi_thermal_dir);
1257                 acpi_device_dir(device) = NULL;
1258         }
1259
1260         return 0;
1261 }
1262
1263 /* --------------------------------------------------------------------------
1264                                  Driver Interface
1265    -------------------------------------------------------------------------- */
1266
1267 static void acpi_thermal_notify(acpi_handle handle, u32 event, void *data)
1268 {
1269         struct acpi_thermal *tz = data;
1270         struct acpi_device *device = NULL;
1271
1272
1273         if (!tz)
1274                 return;
1275
1276         device = tz->device;
1277
1278         switch (event) {
1279         case ACPI_THERMAL_NOTIFY_TEMPERATURE:
1280                 acpi_thermal_check(tz);
1281                 break;
1282         case ACPI_THERMAL_NOTIFY_THRESHOLDS:
1283                 acpi_thermal_trips_update(tz, ACPI_TRIPS_REFRESH_THRESHOLDS);
1284                 acpi_thermal_check(tz);
1285                 acpi_bus_generate_proc_event(device, event, 0);
1286                 acpi_bus_generate_netlink_event(device->pnp.device_class,
1287                                                   dev_name(&device->dev), event, 0);
1288                 break;
1289         case ACPI_THERMAL_NOTIFY_DEVICES:
1290                 acpi_thermal_trips_update(tz, ACPI_TRIPS_REFRESH_DEVICES);
1291                 acpi_thermal_check(tz);
1292                 acpi_bus_generate_proc_event(device, event, 0);
1293                 acpi_bus_generate_netlink_event(device->pnp.device_class,
1294                                                   dev_name(&device->dev), event, 0);
1295                 break;
1296         default:
1297                 ACPI_DEBUG_PRINT((ACPI_DB_INFO,
1298                                   "Unsupported event [0x%x]\n", event));
1299                 break;
1300         }
1301
1302         return;
1303 }
1304
1305 static int acpi_thermal_get_info(struct acpi_thermal *tz)
1306 {
1307         int result = 0;
1308
1309
1310         if (!tz)
1311                 return -EINVAL;
1312
1313         /* Get temperature [_TMP] (required) */
1314         result = acpi_thermal_get_temperature(tz);
1315         if (result)
1316                 return result;
1317
1318         /* Get trip points [_CRT, _PSV, etc.] (required) */
1319         result = acpi_thermal_get_trip_points(tz);
1320         if (result)
1321                 return result;
1322
1323         /* Set the cooling mode [_SCP] to active cooling (default) */
1324         result = acpi_thermal_set_cooling_mode(tz, ACPI_THERMAL_MODE_ACTIVE);
1325         if (!result)
1326                 tz->flags.cooling_mode = 1;
1327
1328         /* Get default polling frequency [_TZP] (optional) */
1329         if (tzp)
1330                 tz->polling_frequency = tzp;
1331         else
1332                 acpi_thermal_get_polling_frequency(tz);
1333
1334         return 0;
1335 }
1336
1337 static int acpi_thermal_add(struct acpi_device *device)
1338 {
1339         int result = 0;
1340         acpi_status status = AE_OK;
1341         struct acpi_thermal *tz = NULL;
1342
1343
1344         if (!device)
1345                 return -EINVAL;
1346
1347         tz = kzalloc(sizeof(struct acpi_thermal), GFP_KERNEL);
1348         if (!tz)
1349                 return -ENOMEM;
1350
1351         tz->device = device;
1352         strcpy(tz->name, device->pnp.bus_id);
1353         strcpy(acpi_device_name(device), ACPI_THERMAL_DEVICE_NAME);
1354         strcpy(acpi_device_class(device), ACPI_THERMAL_CLASS);
1355         device->driver_data = tz;
1356         mutex_init(&tz->lock);
1357
1358
1359         result = acpi_thermal_get_info(tz);
1360         if (result)
1361                 goto free_memory;
1362
1363         result = acpi_thermal_register_thermal_zone(tz);
1364         if (result)
1365                 goto free_memory;
1366
1367         result = acpi_thermal_add_fs(device);
1368         if (result)
1369                 goto unregister_thermal_zone;
1370
1371         status = acpi_install_notify_handler(device->handle,
1372                                              ACPI_DEVICE_NOTIFY,
1373                                              acpi_thermal_notify, tz);
1374         if (ACPI_FAILURE(status)) {
1375                 result = -ENODEV;
1376                 goto remove_fs;
1377         }
1378
1379         printk(KERN_INFO PREFIX "%s [%s] (%ld C)\n",
1380                acpi_device_name(device), acpi_device_bid(device),
1381                KELVIN_TO_CELSIUS(tz->temperature));
1382         goto end;
1383
1384 remove_fs:
1385         acpi_thermal_remove_fs(device);
1386 unregister_thermal_zone:
1387         thermal_zone_device_unregister(tz->thermal_zone);
1388 free_memory:
1389         kfree(tz);
1390 end:
1391         return result;
1392 }
1393
1394 static int acpi_thermal_remove(struct acpi_device *device, int type)
1395 {
1396         acpi_status status = AE_OK;
1397         struct acpi_thermal *tz = NULL;
1398
1399         if (!device || !acpi_driver_data(device))
1400                 return -EINVAL;
1401
1402         tz = acpi_driver_data(device);
1403
1404         status = acpi_remove_notify_handler(device->handle,
1405                                             ACPI_DEVICE_NOTIFY,
1406                                             acpi_thermal_notify);
1407
1408         acpi_thermal_remove_fs(device);
1409         acpi_thermal_unregister_thermal_zone(tz);
1410         mutex_destroy(&tz->lock);
1411         kfree(tz);
1412         return 0;
1413 }
1414
1415 static int acpi_thermal_resume(struct acpi_device *device)
1416 {
1417         struct acpi_thermal *tz = NULL;
1418         int i, j, power_state, result;
1419
1420
1421         if (!device || !acpi_driver_data(device))
1422                 return -EINVAL;
1423
1424         tz = acpi_driver_data(device);
1425
1426         for (i = 0; i < ACPI_THERMAL_MAX_ACTIVE; i++) {
1427                 if (!(&tz->trips.active[i]))
1428                         break;
1429                 if (!tz->trips.active[i].flags.valid)
1430                         break;
1431                 tz->trips.active[i].flags.enabled = 1;
1432                 for (j = 0; j < tz->trips.active[i].devices.count; j++) {
1433                         result = acpi_bus_get_power(tz->trips.active[i].devices.
1434                             handles[j], &power_state);
1435                         if (result || (power_state != ACPI_STATE_D0)) {
1436                                 tz->trips.active[i].flags.enabled = 0;
1437                                 break;
1438                         }
1439                 }
1440                 tz->state.active |= tz->trips.active[i].flags.enabled;
1441         }
1442
1443         acpi_thermal_check(tz);
1444
1445         return AE_OK;
1446 }
1447
1448 static int thermal_act(const struct dmi_system_id *d) {
1449
1450         if (act == 0) {
1451                 printk(KERN_NOTICE "ACPI: %s detected: "
1452                         "disabling all active thermal trip points\n", d->ident);
1453                 act = -1;
1454         }
1455         return 0;
1456 }
1457 static int thermal_nocrt(const struct dmi_system_id *d) {
1458
1459         printk(KERN_NOTICE "ACPI: %s detected: "
1460                 "disabling all critical thermal trip point actions.\n", d->ident);
1461         nocrt = 1;
1462         return 0;
1463 }
1464 static int thermal_tzp(const struct dmi_system_id *d) {
1465
1466         if (tzp == 0) {
1467                 printk(KERN_NOTICE "ACPI: %s detected: "
1468                         "enabling thermal zone polling\n", d->ident);
1469                 tzp = 300;      /* 300 dS = 30 Seconds */
1470         }
1471         return 0;
1472 }
1473 static int thermal_psv(const struct dmi_system_id *d) {
1474
1475         if (psv == 0) {
1476                 printk(KERN_NOTICE "ACPI: %s detected: "
1477                         "disabling all passive thermal trip points\n", d->ident);
1478                 psv = -1;
1479         }
1480         return 0;
1481 }
1482
1483 static struct dmi_system_id thermal_dmi_table[] __initdata = {
1484         /*
1485          * Award BIOS on this AOpen makes thermal control almost worthless.
1486          * http://bugzilla.kernel.org/show_bug.cgi?id=8842
1487          */
1488         {
1489          .callback = thermal_act,
1490          .ident = "AOpen i915GMm-HFS",
1491          .matches = {
1492                 DMI_MATCH(DMI_BOARD_VENDOR, "AOpen"),
1493                 DMI_MATCH(DMI_BOARD_NAME, "i915GMm-HFS"),
1494                 },
1495         },
1496         {
1497          .callback = thermal_psv,
1498          .ident = "AOpen i915GMm-HFS",
1499          .matches = {
1500                 DMI_MATCH(DMI_BOARD_VENDOR, "AOpen"),
1501                 DMI_MATCH(DMI_BOARD_NAME, "i915GMm-HFS"),
1502                 },
1503         },
1504         {
1505          .callback = thermal_tzp,
1506          .ident = "AOpen i915GMm-HFS",
1507          .matches = {
1508                 DMI_MATCH(DMI_BOARD_VENDOR, "AOpen"),
1509                 DMI_MATCH(DMI_BOARD_NAME, "i915GMm-HFS"),
1510                 },
1511         },
1512         {
1513          .callback = thermal_nocrt,
1514          .ident = "Gigabyte GA-7ZX",
1515          .matches = {
1516                 DMI_MATCH(DMI_BOARD_VENDOR, "Gigabyte Technology Co., Ltd."),
1517                 DMI_MATCH(DMI_BOARD_NAME, "7ZX"),
1518                 },
1519         },
1520         {}
1521 };
1522
1523 static int __init acpi_thermal_init(void)
1524 {
1525         int result = 0;
1526
1527         dmi_check_system(thermal_dmi_table);
1528
1529         if (off) {
1530                 printk(KERN_NOTICE "ACPI: thermal control disabled\n");
1531                 return -ENODEV;
1532         }
1533         acpi_thermal_dir = proc_mkdir(ACPI_THERMAL_CLASS, acpi_root_dir);
1534         if (!acpi_thermal_dir)
1535                 return -ENODEV;
1536         acpi_thermal_dir->owner = THIS_MODULE;
1537
1538         result = acpi_bus_register_driver(&acpi_thermal_driver);
1539         if (result < 0) {
1540                 remove_proc_entry(ACPI_THERMAL_CLASS, acpi_root_dir);
1541                 return -ENODEV;
1542         }
1543
1544         return 0;
1545 }
1546
1547 static void __exit acpi_thermal_exit(void)
1548 {
1549
1550         acpi_bus_unregister_driver(&acpi_thermal_driver);
1551
1552         remove_proc_entry(ACPI_THERMAL_CLASS, acpi_root_dir);
1553
1554         return;
1555 }
1556
1557 module_init(acpi_thermal_init);
1558 module_exit(acpi_thermal_exit);