1
2
3
4
5
6
7
8
9
10
11
12
13
14#include <linux/kernel.h>
15#include <linux/module.h>
16#include <linux/power_supply.h>
17#include <linux/errno.h>
18#include <linux/delay.h>
19#include <generated/utsrelease.h>
20
21enum test_power_id {
22 TEST_AC,
23 TEST_BATTERY,
24 TEST_USB,
25 TEST_POWER_NUM,
26};
27
28static int ac_online = 1;
29static int usb_online = 1;
30static int battery_status = POWER_SUPPLY_STATUS_DISCHARGING;
31static int battery_health = POWER_SUPPLY_HEALTH_GOOD;
32static int battery_present = 1;
33static int battery_technology = POWER_SUPPLY_TECHNOLOGY_LION;
34static int battery_capacity = 50;
35static int battery_voltage = 3300;
36static int battery_charge_counter = -1000;
37static int battery_current = -1600;
38
39static bool module_initialized;
40
41static int test_power_get_ac_property(struct power_supply *psy,
42 enum power_supply_property psp,
43 union power_supply_propval *val)
44{
45 switch (psp) {
46 case POWER_SUPPLY_PROP_ONLINE:
47 val->intval = ac_online;
48 break;
49 default:
50 return -EINVAL;
51 }
52 return 0;
53}
54
55static int test_power_get_usb_property(struct power_supply *psy,
56 enum power_supply_property psp,
57 union power_supply_propval *val)
58{
59 switch (psp) {
60 case POWER_SUPPLY_PROP_ONLINE:
61 val->intval = usb_online;
62 break;
63 default:
64 return -EINVAL;
65 }
66 return 0;
67}
68
69static int test_power_get_battery_property(struct power_supply *psy,
70 enum power_supply_property psp,
71 union power_supply_propval *val)
72{
73 switch (psp) {
74 case POWER_SUPPLY_PROP_MODEL_NAME:
75 val->strval = "Test battery";
76 break;
77 case POWER_SUPPLY_PROP_MANUFACTURER:
78 val->strval = "Linux";
79 break;
80 case POWER_SUPPLY_PROP_SERIAL_NUMBER:
81 val->strval = UTS_RELEASE;
82 break;
83 case POWER_SUPPLY_PROP_STATUS:
84 val->intval = battery_status;
85 break;
86 case POWER_SUPPLY_PROP_CHARGE_TYPE:
87 val->intval = POWER_SUPPLY_CHARGE_TYPE_FAST;
88 break;
89 case POWER_SUPPLY_PROP_HEALTH:
90 val->intval = battery_health;
91 break;
92 case POWER_SUPPLY_PROP_PRESENT:
93 val->intval = battery_present;
94 break;
95 case POWER_SUPPLY_PROP_TECHNOLOGY:
96 val->intval = battery_technology;
97 break;
98 case POWER_SUPPLY_PROP_CAPACITY_LEVEL:
99 val->intval = POWER_SUPPLY_CAPACITY_LEVEL_NORMAL;
100 break;
101 case POWER_SUPPLY_PROP_CAPACITY:
102 case POWER_SUPPLY_PROP_CHARGE_NOW:
103 val->intval = battery_capacity;
104 break;
105 case POWER_SUPPLY_PROP_CHARGE_COUNTER:
106 val->intval = battery_charge_counter;
107 break;
108 case POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN:
109 case POWER_SUPPLY_PROP_CHARGE_FULL:
110 val->intval = 100;
111 break;
112 case POWER_SUPPLY_PROP_TIME_TO_EMPTY_AVG:
113 case POWER_SUPPLY_PROP_TIME_TO_FULL_NOW:
114 val->intval = 3600;
115 break;
116 case POWER_SUPPLY_PROP_TEMP:
117 val->intval = 26;
118 break;
119 case POWER_SUPPLY_PROP_VOLTAGE_NOW:
120 val->intval = battery_voltage;
121 break;
122 case POWER_SUPPLY_PROP_CURRENT_AVG:
123 case POWER_SUPPLY_PROP_CURRENT_NOW:
124 val->intval = battery_current;
125 break;
126 default:
127 pr_info("%s: some properties deliberately report errors.\n",
128 __func__);
129 return -EINVAL;
130 }
131 return 0;
132}
133
134static enum power_supply_property test_power_ac_props[] = {
135 POWER_SUPPLY_PROP_ONLINE,
136};
137
138static enum power_supply_property test_power_battery_props[] = {
139 POWER_SUPPLY_PROP_STATUS,
140 POWER_SUPPLY_PROP_CHARGE_TYPE,
141 POWER_SUPPLY_PROP_HEALTH,
142 POWER_SUPPLY_PROP_PRESENT,
143 POWER_SUPPLY_PROP_TECHNOLOGY,
144 POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN,
145 POWER_SUPPLY_PROP_CHARGE_FULL,
146 POWER_SUPPLY_PROP_CHARGE_NOW,
147 POWER_SUPPLY_PROP_CHARGE_COUNTER,
148 POWER_SUPPLY_PROP_CAPACITY,
149 POWER_SUPPLY_PROP_CAPACITY_LEVEL,
150 POWER_SUPPLY_PROP_TIME_TO_EMPTY_AVG,
151 POWER_SUPPLY_PROP_TIME_TO_FULL_NOW,
152 POWER_SUPPLY_PROP_MODEL_NAME,
153 POWER_SUPPLY_PROP_MANUFACTURER,
154 POWER_SUPPLY_PROP_SERIAL_NUMBER,
155 POWER_SUPPLY_PROP_TEMP,
156 POWER_SUPPLY_PROP_VOLTAGE_NOW,
157 POWER_SUPPLY_PROP_CURRENT_AVG,
158 POWER_SUPPLY_PROP_CURRENT_NOW,
159};
160
161static char *test_power_ac_supplied_to[] = {
162 "test_battery",
163};
164
165static struct power_supply *test_power_supplies[TEST_POWER_NUM];
166
167static const struct power_supply_desc test_power_desc[] = {
168 [TEST_AC] = {
169 .name = "test_ac",
170 .type = POWER_SUPPLY_TYPE_MAINS,
171 .properties = test_power_ac_props,
172 .num_properties = ARRAY_SIZE(test_power_ac_props),
173 .get_property = test_power_get_ac_property,
174 },
175 [TEST_BATTERY] = {
176 .name = "test_battery",
177 .type = POWER_SUPPLY_TYPE_BATTERY,
178 .properties = test_power_battery_props,
179 .num_properties = ARRAY_SIZE(test_power_battery_props),
180 .get_property = test_power_get_battery_property,
181 },
182 [TEST_USB] = {
183 .name = "test_usb",
184 .type = POWER_SUPPLY_TYPE_USB,
185 .properties = test_power_ac_props,
186 .num_properties = ARRAY_SIZE(test_power_ac_props),
187 .get_property = test_power_get_usb_property,
188 },
189};
190
191static const struct power_supply_config test_power_configs[] = {
192 {
193
194 .supplied_to = test_power_ac_supplied_to,
195 .num_supplicants = ARRAY_SIZE(test_power_ac_supplied_to),
196 }, {
197
198 }, {
199
200 .supplied_to = test_power_ac_supplied_to,
201 .num_supplicants = ARRAY_SIZE(test_power_ac_supplied_to),
202 },
203};
204
205static int __init test_power_init(void)
206{
207 int i;
208 int ret;
209
210 BUILD_BUG_ON(TEST_POWER_NUM != ARRAY_SIZE(test_power_supplies));
211 BUILD_BUG_ON(TEST_POWER_NUM != ARRAY_SIZE(test_power_configs));
212
213 for (i = 0; i < ARRAY_SIZE(test_power_supplies); i++) {
214 test_power_supplies[i] = power_supply_register(NULL,
215 &test_power_desc[i],
216 &test_power_configs[i]);
217 if (IS_ERR(test_power_supplies[i])) {
218 pr_err("%s: failed to register %s\n", __func__,
219 test_power_desc[i].name);
220 ret = PTR_ERR(test_power_supplies[i]);
221 goto failed;
222 }
223 }
224
225 module_initialized = true;
226 return 0;
227failed:
228 while (--i >= 0)
229 power_supply_unregister(test_power_supplies[i]);
230 return ret;
231}
232module_init(test_power_init);
233
234static void __exit test_power_exit(void)
235{
236 int i;
237
238
239 ac_online = 0;
240 usb_online = 0;
241 battery_status = POWER_SUPPLY_STATUS_DISCHARGING;
242 for (i = 0; i < ARRAY_SIZE(test_power_supplies); i++)
243 power_supply_changed(test_power_supplies[i]);
244 pr_info("%s: 'changed' event sent, sleeping for 10 seconds...\n",
245 __func__);
246 ssleep(10);
247
248 for (i = 0; i < ARRAY_SIZE(test_power_supplies); i++)
249 power_supply_unregister(test_power_supplies[i]);
250
251 module_initialized = false;
252}
253module_exit(test_power_exit);
254
255
256
257#define MAX_KEYLENGTH 256
258struct battery_property_map {
259 int value;
260 char const *key;
261};
262
263static struct battery_property_map map_ac_online[] = {
264 { 0, "off" },
265 { 1, "on" },
266 { -1, NULL },
267};
268
269static struct battery_property_map map_status[] = {
270 { POWER_SUPPLY_STATUS_CHARGING, "charging" },
271 { POWER_SUPPLY_STATUS_DISCHARGING, "discharging" },
272 { POWER_SUPPLY_STATUS_NOT_CHARGING, "not-charging" },
273 { POWER_SUPPLY_STATUS_FULL, "full" },
274 { -1, NULL },
275};
276
277static struct battery_property_map map_health[] = {
278 { POWER_SUPPLY_HEALTH_GOOD, "good" },
279 { POWER_SUPPLY_HEALTH_OVERHEAT, "overheat" },
280 { POWER_SUPPLY_HEALTH_DEAD, "dead" },
281 { POWER_SUPPLY_HEALTH_OVERVOLTAGE, "overvoltage" },
282 { POWER_SUPPLY_HEALTH_UNSPEC_FAILURE, "failure" },
283 { -1, NULL },
284};
285
286static struct battery_property_map map_present[] = {
287 { 0, "false" },
288 { 1, "true" },
289 { -1, NULL },
290};
291
292static struct battery_property_map map_technology[] = {
293 { POWER_SUPPLY_TECHNOLOGY_NiMH, "NiMH" },
294 { POWER_SUPPLY_TECHNOLOGY_LION, "LION" },
295 { POWER_SUPPLY_TECHNOLOGY_LIPO, "LIPO" },
296 { POWER_SUPPLY_TECHNOLOGY_LiFe, "LiFe" },
297 { POWER_SUPPLY_TECHNOLOGY_NiCd, "NiCd" },
298 { POWER_SUPPLY_TECHNOLOGY_LiMn, "LiMn" },
299 { -1, NULL },
300};
301
302
303static int map_get_value(struct battery_property_map *map, const char *key,
304 int def_val)
305{
306 char buf[MAX_KEYLENGTH];
307 int cr;
308
309 strncpy(buf, key, MAX_KEYLENGTH);
310 buf[MAX_KEYLENGTH-1] = '\0';
311
312 cr = strnlen(buf, MAX_KEYLENGTH) - 1;
313 if (cr < 0)
314 return def_val;
315 if (buf[cr] == '\n')
316 buf[cr] = '\0';
317
318 while (map->key) {
319 if (strncasecmp(map->key, buf, MAX_KEYLENGTH) == 0)
320 return map->value;
321 map++;
322 }
323
324 return def_val;
325}
326
327
328static const char *map_get_key(struct battery_property_map *map, int value,
329 const char *def_key)
330{
331 while (map->key) {
332 if (map->value == value)
333 return map->key;
334 map++;
335 }
336
337 return def_key;
338}
339
340static inline void signal_power_supply_changed(struct power_supply *psy)
341{
342 if (module_initialized)
343 power_supply_changed(psy);
344}
345
346static int param_set_ac_online(const char *key, const struct kernel_param *kp)
347{
348 ac_online = map_get_value(map_ac_online, key, ac_online);
349 signal_power_supply_changed(test_power_supplies[TEST_AC]);
350 return 0;
351}
352
353static int param_get_ac_online(char *buffer, const struct kernel_param *kp)
354{
355 return sprintf(buffer, "%s\n",
356 map_get_key(map_ac_online, ac_online, "unknown"));
357}
358
359static int param_set_usb_online(const char *key, const struct kernel_param *kp)
360{
361 usb_online = map_get_value(map_ac_online, key, usb_online);
362 signal_power_supply_changed(test_power_supplies[TEST_USB]);
363 return 0;
364}
365
366static int param_get_usb_online(char *buffer, const struct kernel_param *kp)
367{
368 return sprintf(buffer, "%s\n",
369 map_get_key(map_ac_online, usb_online, "unknown"));
370}
371
372static int param_set_battery_status(const char *key,
373 const struct kernel_param *kp)
374{
375 battery_status = map_get_value(map_status, key, battery_status);
376 signal_power_supply_changed(test_power_supplies[TEST_BATTERY]);
377 return 0;
378}
379
380static int param_get_battery_status(char *buffer, const struct kernel_param *kp)
381{
382 return sprintf(buffer, "%s\n",
383 map_get_key(map_ac_online, battery_status, "unknown"));
384}
385
386static int param_set_battery_health(const char *key,
387 const struct kernel_param *kp)
388{
389 battery_health = map_get_value(map_health, key, battery_health);
390 signal_power_supply_changed(test_power_supplies[TEST_BATTERY]);
391 return 0;
392}
393
394static int param_get_battery_health(char *buffer, const struct kernel_param *kp)
395{
396 return sprintf(buffer, "%s\n",
397 map_get_key(map_ac_online, battery_health, "unknown"));
398}
399
400static int param_set_battery_present(const char *key,
401 const struct kernel_param *kp)
402{
403 battery_present = map_get_value(map_present, key, battery_present);
404 signal_power_supply_changed(test_power_supplies[TEST_AC]);
405 return 0;
406}
407
408static int param_get_battery_present(char *buffer,
409 const struct kernel_param *kp)
410{
411 return sprintf(buffer, "%s\n",
412 map_get_key(map_ac_online, battery_present, "unknown"));
413}
414
415static int param_set_battery_technology(const char *key,
416 const struct kernel_param *kp)
417{
418 battery_technology = map_get_value(map_technology, key,
419 battery_technology);
420 signal_power_supply_changed(test_power_supplies[TEST_BATTERY]);
421 return 0;
422}
423
424static int param_get_battery_technology(char *buffer,
425 const struct kernel_param *kp)
426{
427 return sprintf(buffer, "%s\n",
428 map_get_key(map_ac_online, battery_technology,
429 "unknown"));
430}
431
432static int param_set_battery_capacity(const char *key,
433 const struct kernel_param *kp)
434{
435 int tmp;
436
437 if (1 != sscanf(key, "%d", &tmp))
438 return -EINVAL;
439
440 battery_capacity = tmp;
441 signal_power_supply_changed(test_power_supplies[TEST_BATTERY]);
442 return 0;
443}
444
445#define param_get_battery_capacity param_get_int
446
447static int param_set_battery_voltage(const char *key,
448 const struct kernel_param *kp)
449{
450 int tmp;
451
452 if (1 != sscanf(key, "%d", &tmp))
453 return -EINVAL;
454
455 battery_voltage = tmp;
456 signal_power_supply_changed(test_power_supplies[TEST_BATTERY]);
457 return 0;
458}
459
460#define param_get_battery_voltage param_get_int
461
462static int param_set_battery_charge_counter(const char *key,
463 const struct kernel_param *kp)
464{
465 int tmp;
466
467 if (1 != sscanf(key, "%d", &tmp))
468 return -EINVAL;
469
470 battery_charge_counter = tmp;
471 signal_power_supply_changed(test_power_supplies[TEST_BATTERY]);
472 return 0;
473}
474
475#define param_get_battery_charge_counter param_get_int
476
477static int param_set_battery_current(const char *key,
478 const struct kernel_param *kp)
479{
480 int tmp;
481
482 if (1 != sscanf(key, "%d", &tmp))
483 return -EINVAL;
484
485 battery_current = tmp;
486 signal_power_supply_changed(test_power_supplies[TEST_BATTERY]);
487 return 0;
488}
489
490#define param_get_battery_current param_get_int
491
492static const struct kernel_param_ops param_ops_ac_online = {
493 .set = param_set_ac_online,
494 .get = param_get_ac_online,
495};
496
497static const struct kernel_param_ops param_ops_usb_online = {
498 .set = param_set_usb_online,
499 .get = param_get_usb_online,
500};
501
502static const struct kernel_param_ops param_ops_battery_status = {
503 .set = param_set_battery_status,
504 .get = param_get_battery_status,
505};
506
507static const struct kernel_param_ops param_ops_battery_present = {
508 .set = param_set_battery_present,
509 .get = param_get_battery_present,
510};
511
512static const struct kernel_param_ops param_ops_battery_technology = {
513 .set = param_set_battery_technology,
514 .get = param_get_battery_technology,
515};
516
517static const struct kernel_param_ops param_ops_battery_health = {
518 .set = param_set_battery_health,
519 .get = param_get_battery_health,
520};
521
522static const struct kernel_param_ops param_ops_battery_capacity = {
523 .set = param_set_battery_capacity,
524 .get = param_get_battery_capacity,
525};
526
527static const struct kernel_param_ops param_ops_battery_voltage = {
528 .set = param_set_battery_voltage,
529 .get = param_get_battery_voltage,
530};
531
532static const struct kernel_param_ops param_ops_battery_charge_counter = {
533 .set = param_set_battery_charge_counter,
534 .get = param_get_battery_charge_counter,
535};
536
537static const struct kernel_param_ops param_ops_battery_current = {
538 .set = param_set_battery_current,
539 .get = param_get_battery_current,
540};
541
542#define param_check_ac_online(name, p) __param_check(name, p, void);
543#define param_check_usb_online(name, p) __param_check(name, p, void);
544#define param_check_battery_status(name, p) __param_check(name, p, void);
545#define param_check_battery_present(name, p) __param_check(name, p, void);
546#define param_check_battery_technology(name, p) __param_check(name, p, void);
547#define param_check_battery_health(name, p) __param_check(name, p, void);
548#define param_check_battery_capacity(name, p) __param_check(name, p, void);
549#define param_check_battery_voltage(name, p) __param_check(name, p, void);
550#define param_check_battery_charge_counter(name, p) __param_check(name, p, void);
551#define param_check_battery_current(name, p) __param_check(name, p, void);
552
553
554module_param(ac_online, ac_online, 0644);
555MODULE_PARM_DESC(ac_online, "AC charging state <on|off>");
556
557module_param(usb_online, usb_online, 0644);
558MODULE_PARM_DESC(usb_online, "USB charging state <on|off>");
559
560module_param(battery_status, battery_status, 0644);
561MODULE_PARM_DESC(battery_status,
562 "battery status <charging|discharging|not-charging|full>");
563
564module_param(battery_present, battery_present, 0644);
565MODULE_PARM_DESC(battery_present,
566 "battery presence state <good|overheat|dead|overvoltage|failure>");
567
568module_param(battery_technology, battery_technology, 0644);
569MODULE_PARM_DESC(battery_technology,
570 "battery technology <NiMH|LION|LIPO|LiFe|NiCd|LiMn>");
571
572module_param(battery_health, battery_health, 0644);
573MODULE_PARM_DESC(battery_health,
574 "battery health state <good|overheat|dead|overvoltage|failure>");
575
576module_param(battery_capacity, battery_capacity, 0644);
577MODULE_PARM_DESC(battery_capacity, "battery capacity (percentage)");
578
579module_param(battery_voltage, battery_voltage, 0644);
580MODULE_PARM_DESC(battery_voltage, "battery voltage (millivolts)");
581
582module_param(battery_charge_counter, battery_charge_counter, 0644);
583MODULE_PARM_DESC(battery_charge_counter,
584 "battery charge counter (microampere-hours)");
585
586module_param(battery_current, battery_current, 0644);
587MODULE_PARM_DESC(battery_current, "battery current (milliampere)");
588
589MODULE_DESCRIPTION("Power supply driver for testing");
590MODULE_AUTHOR("Anton Vorontsov <cbouatmailru@gmail.com>");
591MODULE_LICENSE("GPL");
592
