kernel/drivers/power/test_power.c

   1 /*
   2  * Power supply driver for testing.
   3  *
   4  * Copyright 2010  Anton Vorontsov <cbouatmailru@gmail.com>
   5  *
   6  * Dynamic module parameter code from the Virtual Battery Driver
   7  * Copyright (C) 2008 Pylone, Inc.
   8  * By: Masashi YOKOTA <yokota@pylone.jp>
   9  * Originally found here:
  10  * http://downloads.pylone.jp/src/virtual_battery/virtual_battery-0.0.1.tar.bz2
  11  *
  12  * This program is free software; you can redistribute it and/or modify
  13  * it under the terms of the GNU General Public License version 2 as
  14  * published by the Free Software Foundation.
  15  */
  16
  17 #include <linux/kernel.h>
  18 #include <linux/module.h>
  19 #include <linux/power_supply.h>
  20 #include <linux/errno.h>
  21 #include <linux/delay.h>
  22 #include <linux/vermagic.h>
  23
  24 enum test_power_id {
  25         TEST_AC,
  26         TEST_BATTERY,
  27         TEST_USB,
  28         TEST_POWER_NUM,
  29 };
  30
  31 static int ac_online                    = 1;
  32 static int usb_online                   = 1;
  33 static int battery_status               = POWER_SUPPLY_STATUS_DISCHARGING;
  34 static int battery_health               = POWER_SUPPLY_HEALTH_GOOD;
  35 static int battery_present              = 1; /* true */
  36 static int battery_technology           = POWER_SUPPLY_TECHNOLOGY_LION;
  37 static int battery_capacity             = 50;
  38 static int battery_voltage              = 3300;
  39
  40 static bool module_initialized;
  41
  42 static int test_power_get_ac_property(struct power_supply *psy,
  43                                       enum power_supply_property psp,
  44                                       union power_supply_propval *val)
  45 {
  46         switch (psp) {
  47         case POWER_SUPPLY_PROP_ONLINE:
  48                 val->intval = ac_online;
  49                 break;
  50         default:
  51                 return -EINVAL;
  52         }
  53         return 0;
  54 }
  55
  56 static int test_power_get_usb_property(struct power_supply *psy,
  57                                       enum power_supply_property psp,
  58                                       union power_supply_propval *val)
  59 {
  60         switch (psp) {
  61         case POWER_SUPPLY_PROP_ONLINE:
  62                 val->intval = usb_online;
  63                 break;
  64         default:
  65                 return -EINVAL;
  66         }
  67         return 0;
  68 }
  69
  70 static int test_power_get_battery_property(struct power_supply *psy,
  71                                            enum power_supply_property psp,
  72                                            union power_supply_propval *val)
  73 {
  74         switch (psp) {
  75         case POWER_SUPPLY_PROP_MODEL_NAME:
  76                 val->strval = "Test battery";
  77                 break;
  78         case POWER_SUPPLY_PROP_MANUFACTURER:
  79                 val->strval = "Linux";
  80                 break;
  81         case POWER_SUPPLY_PROP_SERIAL_NUMBER:
  82                 val->strval = UTS_RELEASE;
  83                 break;
  84         case POWER_SUPPLY_PROP_STATUS:
  85                 val->intval = battery_status;
  86                 break;
  87         case POWER_SUPPLY_PROP_CHARGE_TYPE:
  88                 val->intval = POWER_SUPPLY_CHARGE_TYPE_FAST;
  89                 break;
  90         case POWER_SUPPLY_PROP_HEALTH:
  91                 val->intval = battery_health;
  92                 break;
  93         case POWER_SUPPLY_PROP_PRESENT:
  94                 val->intval = battery_present;
  95                 break;
  96         case POWER_SUPPLY_PROP_TECHNOLOGY:
  97                 val->intval = battery_technology;
  98                 break;
  99         case POWER_SUPPLY_PROP_CAPACITY_LEVEL:
 100                 val->intval = POWER_SUPPLY_CAPACITY_LEVEL_NORMAL;
 101                 break;
 102         case POWER_SUPPLY_PROP_CAPACITY:
 103         case POWER_SUPPLY_PROP_CHARGE_NOW:
 104                 val->intval = battery_capacity;
 105                 break;
 106         case POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN:
 107         case POWER_SUPPLY_PROP_CHARGE_FULL:
 108                 val->intval = 100;
 109                 break;
 110         case POWER_SUPPLY_PROP_TIME_TO_EMPTY_AVG:
 111         case POWER_SUPPLY_PROP_TIME_TO_FULL_NOW:
 112                 val->intval = 3600;
 113                 break;
 114         case POWER_SUPPLY_PROP_TEMP:
 115                 val->intval = 26;
 116                 break;
 117         case POWER_SUPPLY_PROP_VOLTAGE_NOW:
 118                 val->intval = battery_voltage;
 119                 break;
 120         default:
 121                 pr_info("%s: some properties deliberately report errors.\n",
 122                         __func__);
 123                 return -EINVAL;
 124         }
 125         return 0;
 126 }
 127
 128 static enum power_supply_property test_power_ac_props[] = {
 129         POWER_SUPPLY_PROP_ONLINE,
 130 };
 131
 132 static enum power_supply_property test_power_battery_props[] = {
 133         POWER_SUPPLY_PROP_STATUS,
 134         POWER_SUPPLY_PROP_CHARGE_TYPE,
 135         POWER_SUPPLY_PROP_HEALTH,
 136         POWER_SUPPLY_PROP_PRESENT,
 137         POWER_SUPPLY_PROP_TECHNOLOGY,
 138         POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN,
 139         POWER_SUPPLY_PROP_CHARGE_FULL,
 140         POWER_SUPPLY_PROP_CHARGE_NOW,
 141         POWER_SUPPLY_PROP_CAPACITY,
 142         POWER_SUPPLY_PROP_CAPACITY_LEVEL,
 143         POWER_SUPPLY_PROP_TIME_TO_EMPTY_AVG,
 144         POWER_SUPPLY_PROP_TIME_TO_FULL_NOW,
 145         POWER_SUPPLY_PROP_MODEL_NAME,
 146         POWER_SUPPLY_PROP_MANUFACTURER,
 147         POWER_SUPPLY_PROP_SERIAL_NUMBER,
 148         POWER_SUPPLY_PROP_TEMP,
 149         POWER_SUPPLY_PROP_VOLTAGE_NOW,
 150 };
 151
 152 static char *test_power_ac_supplied_to[] = {
 153         "test_battery",
 154 };
 155
 156 static struct power_supply *test_power_supplies[TEST_POWER_NUM];
 157
 158 static const struct power_supply_desc test_power_desc[] = {
 159         [TEST_AC] = {
 160                 .name = "test_ac",
 161                 .type = POWER_SUPPLY_TYPE_MAINS,
 162                 .properties = test_power_ac_props,
 163                 .num_properties = ARRAY_SIZE(test_power_ac_props),
 164                 .get_property = test_power_get_ac_property,
 165         },
 166         [TEST_BATTERY] = {
 167                 .name = "test_battery",
 168                 .type = POWER_SUPPLY_TYPE_BATTERY,
 169                 .properties = test_power_battery_props,
 170                 .num_properties = ARRAY_SIZE(test_power_battery_props),
 171                 .get_property = test_power_get_battery_property,
 172         },
 173         [TEST_USB] = {
 174                 .name = "test_usb",
 175                 .type = POWER_SUPPLY_TYPE_USB,
 176                 .properties = test_power_ac_props,
 177                 .num_properties = ARRAY_SIZE(test_power_ac_props),
 178                 .get_property = test_power_get_usb_property,
 179         },
 180 };
 181
 182 static const struct power_supply_config test_power_configs[] = {
 183         {
 184                 /* test_ac */
 185                 .supplied_to = test_power_ac_supplied_to,
 186                 .num_supplicants = ARRAY_SIZE(test_power_ac_supplied_to),
 187         }, {
 188                 /* test_battery */
 189         }, {
 190                 /* test_usb */
 191                 .supplied_to = test_power_ac_supplied_to,
 192                 .num_supplicants = ARRAY_SIZE(test_power_ac_supplied_to),
 193         },
 194 };
 195
 196 static int __init test_power_init(void)
 197 {
 198         int i;
 199         int ret;
 200
 201         BUILD_BUG_ON(TEST_POWER_NUM != ARRAY_SIZE(test_power_supplies));
 202         BUILD_BUG_ON(TEST_POWER_NUM != ARRAY_SIZE(test_power_configs));
 203
 204         for (i = 0; i < ARRAY_SIZE(test_power_supplies); i++) {
 205                 test_power_supplies[i] = power_supply_register(NULL,
 206                                                 &test_power_desc[i],
 207                                                 &test_power_configs[i]);
 208                 if (IS_ERR(test_power_supplies[i])) {
 209                         pr_err("%s: failed to register %s\n", __func__,
 210                                 test_power_desc[i].name);
 211                         ret = PTR_ERR(test_power_supplies[i]);
 212                         goto failed;
 213                 }
 214         }
 215
 216         module_initialized = true;
 217         return 0;
 218 failed:
 219         while (--i >= 0)
 220                 power_supply_unregister(test_power_supplies[i]);
 221         return ret;
 222 }
 223 module_init(test_power_init);
 224
 225 static void __exit test_power_exit(void)
 226 {
 227         int i;
 228
 229         /* Let's see how we handle changes... */
 230         ac_online = 0;
 231         usb_online = 0;
 232         battery_status = POWER_SUPPLY_STATUS_DISCHARGING;
 233         for (i = 0; i < ARRAY_SIZE(test_power_supplies); i++)
 234                 power_supply_changed(test_power_supplies[i]);
 235         pr_info("%s: 'changed' event sent, sleeping for 10 seconds...\n",
 236                 __func__);
 237         ssleep(10);
 238
 239         for (i = 0; i < ARRAY_SIZE(test_power_supplies); i++)
 240                 power_supply_unregister(test_power_supplies[i]);
 241
 242         module_initialized = false;
 243 }
 244 module_exit(test_power_exit);
 245
 246
 247
 248 #define MAX_KEYLENGTH 256
 249 struct battery_property_map {
 250         int value;
 251         char const *key;
 252 };
 253
 254 static struct battery_property_map map_ac_online[] = {
 255         { 0,  "off"  },
 256         { 1,  "on" },
 257         { -1, NULL  },
 258 };
 259
 260 static struct battery_property_map map_status[] = {
 261         { POWER_SUPPLY_STATUS_CHARGING,     "charging"     },
 262         { POWER_SUPPLY_STATUS_DISCHARGING,  "discharging"  },
 263         { POWER_SUPPLY_STATUS_NOT_CHARGING, "not-charging" },
 264         { POWER_SUPPLY_STATUS_FULL,         "full"         },
 265         { -1,                               NULL           },
 266 };
 267
 268 static struct battery_property_map map_health[] = {
 269         { POWER_SUPPLY_HEALTH_GOOD,           "good"        },
 270         { POWER_SUPPLY_HEALTH_OVERHEAT,       "overheat"    },
 271         { POWER_SUPPLY_HEALTH_DEAD,           "dead"        },
 272         { POWER_SUPPLY_HEALTH_OVERVOLTAGE,    "overvoltage" },
 273         { POWER_SUPPLY_HEALTH_UNSPEC_FAILURE, "failure"     },
 274         { -1,                                 NULL          },
 275 };
 276
 277 static struct battery_property_map map_present[] = {
 278         { 0,  "false" },
 279         { 1,  "true"  },
 280         { -1, NULL    },
 281 };
 282
 283 static struct battery_property_map map_technology[] = {
 284         { POWER_SUPPLY_TECHNOLOGY_NiMH, "NiMH" },
 285         { POWER_SUPPLY_TECHNOLOGY_LION, "LION" },
 286         { POWER_SUPPLY_TECHNOLOGY_LIPO, "LIPO" },
 287         { POWER_SUPPLY_TECHNOLOGY_LiFe, "LiFe" },
 288         { POWER_SUPPLY_TECHNOLOGY_NiCd, "NiCd" },
 289         { POWER_SUPPLY_TECHNOLOGY_LiMn, "LiMn" },
 290         { -1,                           NULL   },
 291 };
 292
 293
 294 static int map_get_value(struct battery_property_map *map, const char *key,
 295                                 int def_val)
 296 {
 297         char buf[MAX_KEYLENGTH];
 298         int cr;
 299
 300         strncpy(buf, key, MAX_KEYLENGTH);
 301         buf[MAX_KEYLENGTH-1] = '\0';
 302
 303         cr = strnlen(buf, MAX_KEYLENGTH) - 1;
 304         if (buf[cr] == '\n')
 305                 buf[cr] = '\0';
 306
 307         while (map->key) {
 308                 if (strncasecmp(map->key, buf, MAX_KEYLENGTH) == 0)
 309                         return map->value;
 310                 map++;
 311         }
 312
 313         return def_val;
 314 }
 315
 316
 317 static const char *map_get_key(struct battery_property_map *map, int value,
 318                                 const char *def_key)
 319 {
 320         while (map->key) {
 321                 if (map->value == value)
 322                         return map->key;
 323                 map++;
 324         }
 325
 326         return def_key;
 327 }
 328
 329 static inline void signal_power_supply_changed(struct power_supply *psy)
 330 {
 331         if (module_initialized)
 332                 power_supply_changed(psy);
 333 }
 334
 335 static int param_set_ac_online(const char *key, const struct kernel_param *kp)
 336 {
 337         ac_online = map_get_value(map_ac_online, key, ac_online);
 338         signal_power_supply_changed(test_power_supplies[TEST_AC]);
 339         return 0;
 340 }
 341
 342 static int param_get_ac_online(char *buffer, const struct kernel_param *kp)
 343 {
 344         strcpy(buffer, map_get_key(map_ac_online, ac_online, "unknown"));
 345         return strlen(buffer);
 346 }
 347
 348 static int param_set_usb_online(const char *key, const struct kernel_param *kp)
 349 {
 350         usb_online = map_get_value(map_ac_online, key, usb_online);
 351         signal_power_supply_changed(test_power_supplies[TEST_USB]);
 352         return 0;
 353 }
 354
 355 static int param_get_usb_online(char *buffer, const struct kernel_param *kp)
 356 {
 357         strcpy(buffer, map_get_key(map_ac_online, usb_online, "unknown"));
 358         return strlen(buffer);
 359 }
 360
 361 static int param_set_battery_status(const char *key,
 362                                         const struct kernel_param *kp)
 363 {
 364         battery_status = map_get_value(map_status, key, battery_status);
 365         signal_power_supply_changed(test_power_supplies[TEST_BATTERY]);
 366         return 0;
 367 }
 368
 369 static int param_get_battery_status(char *buffer, const struct kernel_param *kp)
 370 {
 371         strcpy(buffer, map_get_key(map_status, battery_status, "unknown"));
 372         return strlen(buffer);
 373 }
 374
 375 static int param_set_battery_health(const char *key,
 376                                         const struct kernel_param *kp)
 377 {
 378         battery_health = map_get_value(map_health, key, battery_health);
 379         signal_power_supply_changed(test_power_supplies[TEST_BATTERY]);
 380         return 0;
 381 }
 382
 383 static int param_get_battery_health(char *buffer, const struct kernel_param *kp)
 384 {
 385         strcpy(buffer, map_get_key(map_health, battery_health, "unknown"));
 386         return strlen(buffer);
 387 }
 388
 389 static int param_set_battery_present(const char *key,
 390                                         const struct kernel_param *kp)
 391 {
 392         battery_present = map_get_value(map_present, key, battery_present);
 393         signal_power_supply_changed(test_power_supplies[TEST_AC]);
 394         return 0;
 395 }
 396
 397 static int param_get_battery_present(char *buffer,
 398                                         const struct kernel_param *kp)
 399 {
 400         strcpy(buffer, map_get_key(map_present, battery_present, "unknown"));
 401         return strlen(buffer);
 402 }
 403
 404 static int param_set_battery_technology(const char *key,
 405                                         const struct kernel_param *kp)
 406 {
 407         battery_technology = map_get_value(map_technology, key,
 408                                                 battery_technology);
 409         signal_power_supply_changed(test_power_supplies[TEST_BATTERY]);
 410         return 0;
 411 }
 412
 413 static int param_get_battery_technology(char *buffer,
 414                                         const struct kernel_param *kp)
 415 {
 416         strcpy(buffer,
 417                 map_get_key(map_technology, battery_technology, "unknown"));
 418         return strlen(buffer);
 419 }
 420
 421 static int param_set_battery_capacity(const char *key,
 422                                         const struct kernel_param *kp)
 423 {
 424         int tmp;
 425
 426         if (1 != sscanf(key, "%d", &tmp))
 427                 return -EINVAL;
 428
 429         battery_capacity = tmp;
 430         signal_power_supply_changed(test_power_supplies[TEST_BATTERY]);
 431         return 0;
 432 }
 433
 434 #define param_get_battery_capacity param_get_int
 435
 436 static int param_set_battery_voltage(const char *key,
 437                                         const struct kernel_param *kp)
 438 {
 439         int tmp;
 440
 441         if (1 != sscanf(key, "%d", &tmp))
 442                 return -EINVAL;
 443
 444         battery_voltage = tmp;
 445         signal_power_supply_changed(test_power_supplies[TEST_BATTERY]);
 446         return 0;
 447 }
 448
 449 #define param_get_battery_voltage param_get_int
 450
 451 static struct kernel_param_ops param_ops_ac_online = {
 452         .set = param_set_ac_online,
 453         .get = param_get_ac_online,
 454 };
 455
 456 static struct kernel_param_ops param_ops_usb_online = {
 457         .set = param_set_usb_online,
 458         .get = param_get_usb_online,
 459 };
 460
 461 static struct kernel_param_ops param_ops_battery_status = {
 462         .set = param_set_battery_status,
 463         .get = param_get_battery_status,
 464 };
 465
 466 static struct kernel_param_ops param_ops_battery_present = {
 467         .set = param_set_battery_present,
 468         .get = param_get_battery_present,
 469 };
 470
 471 static struct kernel_param_ops param_ops_battery_technology = {
 472         .set = param_set_battery_technology,
 473         .get = param_get_battery_technology,
 474 };
 475
 476 static struct kernel_param_ops param_ops_battery_health = {
 477         .set = param_set_battery_health,
 478         .get = param_get_battery_health,
 479 };
 480
 481 static struct kernel_param_ops param_ops_battery_capacity = {
 482         .set = param_set_battery_capacity,
 483         .get = param_get_battery_capacity,
 484 };
 485
 486 static struct kernel_param_ops param_ops_battery_voltage = {
 487         .set = param_set_battery_voltage,
 488         .get = param_get_battery_voltage,
 489 };
 490
 491 #define param_check_ac_online(name, p) __param_check(name, p, void);
 492 #define param_check_usb_online(name, p) __param_check(name, p, void);
 493 #define param_check_battery_status(name, p) __param_check(name, p, void);
 494 #define param_check_battery_present(name, p) __param_check(name, p, void);
 495 #define param_check_battery_technology(name, p) __param_check(name, p, void);
 496 #define param_check_battery_health(name, p) __param_check(name, p, void);
 497 #define param_check_battery_capacity(name, p) __param_check(name, p, void);
 498 #define param_check_battery_voltage(name, p) __param_check(name, p, void);
 499
 500
 501 module_param(ac_online, ac_online, 0644);
 502 MODULE_PARM_DESC(ac_online, "AC charging state <on|off>");
 503
 504 module_param(usb_online, usb_online, 0644);
 505 MODULE_PARM_DESC(usb_online, "USB charging state <on|off>");
 506
 507 module_param(battery_status, battery_status, 0644);
 508 MODULE_PARM_DESC(battery_status,
 509         "battery status <charging|discharging|not-charging|full>");
 510
 511 module_param(battery_present, battery_present, 0644);
 512 MODULE_PARM_DESC(battery_present,
 513         "battery presence state <good|overheat|dead|overvoltage|failure>");
 514
 515 module_param(battery_technology, battery_technology, 0644);
 516 MODULE_PARM_DESC(battery_technology,
 517         "battery technology <NiMH|LION|LIPO|LiFe|NiCd|LiMn>");
 518
 519 module_param(battery_health, battery_health, 0644);
 520 MODULE_PARM_DESC(battery_health,
 521         "battery health state <good|overheat|dead|overvoltage|failure>");
 522
 523 module_param(battery_capacity, battery_capacity, 0644);
 524 MODULE_PARM_DESC(battery_capacity, "battery capacity (percentage)");
 525
 526 module_param(battery_voltage, battery_voltage, 0644);
 527 MODULE_PARM_DESC(battery_voltage, "battery voltage (millivolts)");
 528
 529 MODULE_DESCRIPTION("Power supply driver for testing");
 530 MODULE_AUTHOR("Anton Vorontsov <cbouatmailru@gmail.com>");
 531 MODULE_LICENSE("GPL");