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