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