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