2 * Power supply driver for testing.
4 * Copyright 2010 Anton Vorontsov <cbouatmailru@gmail.com>
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
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.
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>
24 static int ac_online = 1;
25 static int usb_online = 1;
26 static int battery_status = POWER_SUPPLY_STATUS_DISCHARGING;
27 static int battery_health = POWER_SUPPLY_HEALTH_GOOD;
28 static int battery_present = 1; /* true */
29 static int battery_technology = POWER_SUPPLY_TECHNOLOGY_LION;
30 static int battery_capacity = 50;
31 static int battery_voltage = 3300;
33 static int test_power_get_ac_property(struct power_supply *psy,
34 enum power_supply_property psp,
35 union power_supply_propval *val)
38 case POWER_SUPPLY_PROP_ONLINE:
39 val->intval = ac_online;
47 static int test_power_get_usb_property(struct power_supply *psy,
48 enum power_supply_property psp,
49 union power_supply_propval *val)
52 case POWER_SUPPLY_PROP_ONLINE:
53 val->intval = usb_online;
61 static int test_power_get_battery_property(struct power_supply *psy,
62 enum power_supply_property psp,
63 union power_supply_propval *val)
66 case POWER_SUPPLY_PROP_MODEL_NAME:
67 val->strval = "Test battery";
69 case POWER_SUPPLY_PROP_MANUFACTURER:
70 val->strval = "Linux";
72 case POWER_SUPPLY_PROP_SERIAL_NUMBER:
73 val->strval = UTS_RELEASE;
75 case POWER_SUPPLY_PROP_STATUS:
76 val->intval = battery_status;
78 case POWER_SUPPLY_PROP_CHARGE_TYPE:
79 val->intval = POWER_SUPPLY_CHARGE_TYPE_FAST;
81 case POWER_SUPPLY_PROP_HEALTH:
82 val->intval = battery_health;
84 case POWER_SUPPLY_PROP_PRESENT:
85 val->intval = battery_present;
87 case POWER_SUPPLY_PROP_TECHNOLOGY:
88 val->intval = battery_technology;
90 case POWER_SUPPLY_PROP_CAPACITY_LEVEL:
91 val->intval = POWER_SUPPLY_CAPACITY_LEVEL_NORMAL;
93 case POWER_SUPPLY_PROP_CAPACITY:
94 case POWER_SUPPLY_PROP_CHARGE_NOW:
95 val->intval = battery_capacity;
97 case POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN:
98 case POWER_SUPPLY_PROP_CHARGE_FULL:
101 case POWER_SUPPLY_PROP_TIME_TO_EMPTY_AVG:
102 case POWER_SUPPLY_PROP_TIME_TO_FULL_NOW:
105 case POWER_SUPPLY_PROP_TEMP:
108 case POWER_SUPPLY_PROP_VOLTAGE_NOW:
109 val->intval = battery_voltage;
112 pr_info("%s: some properties deliberately report errors.\n",
119 static enum power_supply_property test_power_ac_props[] = {
120 POWER_SUPPLY_PROP_ONLINE,
123 static enum power_supply_property test_power_battery_props[] = {
124 POWER_SUPPLY_PROP_STATUS,
125 POWER_SUPPLY_PROP_CHARGE_TYPE,
126 POWER_SUPPLY_PROP_HEALTH,
127 POWER_SUPPLY_PROP_PRESENT,
128 POWER_SUPPLY_PROP_TECHNOLOGY,
129 POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN,
130 POWER_SUPPLY_PROP_CHARGE_FULL,
131 POWER_SUPPLY_PROP_CHARGE_NOW,
132 POWER_SUPPLY_PROP_CAPACITY,
133 POWER_SUPPLY_PROP_CAPACITY_LEVEL,
134 POWER_SUPPLY_PROP_TIME_TO_EMPTY_AVG,
135 POWER_SUPPLY_PROP_TIME_TO_FULL_NOW,
136 POWER_SUPPLY_PROP_MODEL_NAME,
137 POWER_SUPPLY_PROP_MANUFACTURER,
138 POWER_SUPPLY_PROP_SERIAL_NUMBER,
139 POWER_SUPPLY_PROP_TEMP,
140 POWER_SUPPLY_PROP_VOLTAGE_NOW,
143 static char *test_power_ac_supplied_to[] = {
147 static struct power_supply test_power_supplies[] = {
150 .type = POWER_SUPPLY_TYPE_MAINS,
151 .supplied_to = test_power_ac_supplied_to,
152 .num_supplicants = ARRAY_SIZE(test_power_ac_supplied_to),
153 .properties = test_power_ac_props,
154 .num_properties = ARRAY_SIZE(test_power_ac_props),
155 .get_property = test_power_get_ac_property,
157 .name = "test_battery",
158 .type = POWER_SUPPLY_TYPE_BATTERY,
159 .properties = test_power_battery_props,
160 .num_properties = ARRAY_SIZE(test_power_battery_props),
161 .get_property = test_power_get_battery_property,
164 .type = POWER_SUPPLY_TYPE_USB,
165 .supplied_to = test_power_ac_supplied_to,
166 .num_supplicants = ARRAY_SIZE(test_power_ac_supplied_to),
167 .properties = test_power_ac_props,
168 .num_properties = ARRAY_SIZE(test_power_ac_props),
169 .get_property = test_power_get_usb_property,
174 static int __init test_power_init(void)
179 for (i = 0; i < ARRAY_SIZE(test_power_supplies); i++) {
180 ret = power_supply_register(NULL, &test_power_supplies[i]);
182 pr_err("%s: failed to register %s\n", __func__,
183 test_power_supplies[i].name);
191 power_supply_unregister(&test_power_supplies[i]);
194 module_init(test_power_init);
196 static void __exit test_power_exit(void)
200 /* Let's see how we handle changes... */
203 battery_status = POWER_SUPPLY_STATUS_DISCHARGING;
204 for (i = 0; i < ARRAY_SIZE(test_power_supplies); i++)
205 power_supply_changed(&test_power_supplies[i]);
206 pr_info("%s: 'changed' event sent, sleeping for 10 seconds...\n",
210 for (i = 0; i < ARRAY_SIZE(test_power_supplies); i++)
211 power_supply_unregister(&test_power_supplies[i]);
213 module_exit(test_power_exit);
217 #define MAX_KEYLENGTH 256
218 struct battery_property_map {
223 static struct battery_property_map map_ac_online[] = {
229 static struct battery_property_map map_status[] = {
230 { POWER_SUPPLY_STATUS_CHARGING, "charging" },
231 { POWER_SUPPLY_STATUS_DISCHARGING, "discharging" },
232 { POWER_SUPPLY_STATUS_NOT_CHARGING, "not-charging" },
233 { POWER_SUPPLY_STATUS_FULL, "full" },
237 static struct battery_property_map map_health[] = {
238 { POWER_SUPPLY_HEALTH_GOOD, "good" },
239 { POWER_SUPPLY_HEALTH_OVERHEAT, "overheat" },
240 { POWER_SUPPLY_HEALTH_DEAD, "dead" },
241 { POWER_SUPPLY_HEALTH_OVERVOLTAGE, "overvoltage" },
242 { POWER_SUPPLY_HEALTH_UNSPEC_FAILURE, "failure" },
246 static struct battery_property_map map_present[] = {
252 static struct battery_property_map map_technology[] = {
253 { POWER_SUPPLY_TECHNOLOGY_NiMH, "NiMH" },
254 { POWER_SUPPLY_TECHNOLOGY_LION, "LION" },
255 { POWER_SUPPLY_TECHNOLOGY_LIPO, "LIPO" },
256 { POWER_SUPPLY_TECHNOLOGY_LiFe, "LiFe" },
257 { POWER_SUPPLY_TECHNOLOGY_NiCd, "NiCd" },
258 { POWER_SUPPLY_TECHNOLOGY_LiMn, "LiMn" },
263 static int map_get_value(struct battery_property_map *map, const char *key,
266 char buf[MAX_KEYLENGTH];
269 strncpy(buf, key, MAX_KEYLENGTH);
270 buf[MAX_KEYLENGTH-1] = '\0';
272 cr = strnlen(buf, MAX_KEYLENGTH) - 1;
277 if (strncasecmp(map->key, buf, MAX_KEYLENGTH) == 0)
286 static const char *map_get_key(struct battery_property_map *map, int value,
290 if (map->value == value)
298 static int param_set_ac_online(const char *key, const struct kernel_param *kp)
300 ac_online = map_get_value(map_ac_online, key, ac_online);
301 power_supply_changed(&test_power_supplies[0]);
305 static int param_get_ac_online(char *buffer, const struct kernel_param *kp)
307 strcpy(buffer, map_get_key(map_ac_online, ac_online, "unknown"));
308 return strlen(buffer);
311 static int param_set_usb_online(const char *key, const struct kernel_param *kp)
313 usb_online = map_get_value(map_ac_online, key, usb_online);
314 power_supply_changed(&test_power_supplies[2]);
318 static int param_get_usb_online(char *buffer, const struct kernel_param *kp)
320 strcpy(buffer, map_get_key(map_ac_online, usb_online, "unknown"));
321 return strlen(buffer);
324 static int param_set_battery_status(const char *key,
325 const struct kernel_param *kp)
327 battery_status = map_get_value(map_status, key, battery_status);
328 power_supply_changed(&test_power_supplies[1]);
332 static int param_get_battery_status(char *buffer, const struct kernel_param *kp)
334 strcpy(buffer, map_get_key(map_status, battery_status, "unknown"));
335 return strlen(buffer);
338 static int param_set_battery_health(const char *key,
339 const struct kernel_param *kp)
341 battery_health = map_get_value(map_health, key, battery_health);
342 power_supply_changed(&test_power_supplies[1]);
346 static int param_get_battery_health(char *buffer, const struct kernel_param *kp)
348 strcpy(buffer, map_get_key(map_health, battery_health, "unknown"));
349 return strlen(buffer);
352 static int param_set_battery_present(const char *key,
353 const struct kernel_param *kp)
355 battery_present = map_get_value(map_present, key, battery_present);
356 power_supply_changed(&test_power_supplies[0]);
360 static int param_get_battery_present(char *buffer,
361 const struct kernel_param *kp)
363 strcpy(buffer, map_get_key(map_present, battery_present, "unknown"));
364 return strlen(buffer);
367 static int param_set_battery_technology(const char *key,
368 const struct kernel_param *kp)
370 battery_technology = map_get_value(map_technology, key,
372 power_supply_changed(&test_power_supplies[1]);
376 static int param_get_battery_technology(char *buffer,
377 const struct kernel_param *kp)
380 map_get_key(map_technology, battery_technology, "unknown"));
381 return strlen(buffer);
384 static int param_set_battery_capacity(const char *key,
385 const struct kernel_param *kp)
389 if (1 != sscanf(key, "%d", &tmp))
392 battery_capacity = tmp;
393 power_supply_changed(&test_power_supplies[1]);
397 #define param_get_battery_capacity param_get_int
399 static int param_set_battery_voltage(const char *key,
400 const struct kernel_param *kp)
404 if (1 != sscanf(key, "%d", &tmp))
407 battery_voltage = tmp;
408 power_supply_changed(&test_power_supplies[1]);
412 #define param_get_battery_voltage param_get_int
414 static struct kernel_param_ops param_ops_ac_online = {
415 .set = param_set_ac_online,
416 .get = param_get_ac_online,
419 static struct kernel_param_ops param_ops_usb_online = {
420 .set = param_set_usb_online,
421 .get = param_get_usb_online,
424 static struct kernel_param_ops param_ops_battery_status = {
425 .set = param_set_battery_status,
426 .get = param_get_battery_status,
429 static struct kernel_param_ops param_ops_battery_present = {
430 .set = param_set_battery_present,
431 .get = param_get_battery_present,
434 static struct kernel_param_ops param_ops_battery_technology = {
435 .set = param_set_battery_technology,
436 .get = param_get_battery_technology,
439 static struct kernel_param_ops param_ops_battery_health = {
440 .set = param_set_battery_health,
441 .get = param_get_battery_health,
444 static struct kernel_param_ops param_ops_battery_capacity = {
445 .set = param_set_battery_capacity,
446 .get = param_get_battery_capacity,
449 static struct kernel_param_ops param_ops_battery_voltage = {
450 .set = param_set_battery_voltage,
451 .get = param_get_battery_voltage,
454 #define param_check_ac_online(name, p) __param_check(name, p, void);
455 #define param_check_usb_online(name, p) __param_check(name, p, void);
456 #define param_check_battery_status(name, p) __param_check(name, p, void);
457 #define param_check_battery_present(name, p) __param_check(name, p, void);
458 #define param_check_battery_technology(name, p) __param_check(name, p, void);
459 #define param_check_battery_health(name, p) __param_check(name, p, void);
460 #define param_check_battery_capacity(name, p) __param_check(name, p, void);
461 #define param_check_battery_voltage(name, p) __param_check(name, p, void);
464 module_param(ac_online, ac_online, 0644);
465 MODULE_PARM_DESC(ac_online, "AC charging state <on|off>");
467 module_param(usb_online, usb_online, 0644);
468 MODULE_PARM_DESC(usb_online, "USB charging state <on|off>");
470 module_param(battery_status, battery_status, 0644);
471 MODULE_PARM_DESC(battery_status,
472 "battery status <charging|discharging|not-charging|full>");
474 module_param(battery_present, battery_present, 0644);
475 MODULE_PARM_DESC(battery_present,
476 "battery presence state <good|overheat|dead|overvoltage|failure>");
478 module_param(battery_technology, battery_technology, 0644);
479 MODULE_PARM_DESC(battery_technology,
480 "battery technology <NiMH|LION|LIPO|LiFe|NiCd|LiMn>");
482 module_param(battery_health, battery_health, 0644);
483 MODULE_PARM_DESC(battery_health,
484 "battery health state <good|overheat|dead|overvoltage|failure>");
486 module_param(battery_capacity, battery_capacity, 0644);
487 MODULE_PARM_DESC(battery_capacity, "battery capacity (percentage)");
489 module_param(battery_voltage, battery_voltage, 0644);
490 MODULE_PARM_DESC(battery_voltage, "battery voltage (millivolts)");
492 MODULE_DESCRIPTION("Power supply driver for testing");
493 MODULE_AUTHOR("Anton Vorontsov <cbouatmailru@gmail.com>");
494 MODULE_LICENSE("GPL");