Commit | Line | Data |
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4a11b59d AV |
1 | /* |
2 | * Sysfs interface for the universal power supply monitor class | |
3 | * | |
4 | * Copyright © 2007 David Woodhouse <dwmw2@infradead.org> | |
5 | * Copyright © 2007 Anton Vorontsov <cbou@mail.ru> | |
6 | * Copyright © 2004 Szabolcs Gyurko | |
7 | * Copyright © 2003 Ian Molton <spyro@f2s.com> | |
8 | * | |
9 | * Modified: 2004, Oct Szabolcs Gyurko | |
10 | * | |
11 | * You may use this code as per GPL version 2 | |
12 | */ | |
13 | ||
14 | #include <linux/ctype.h> | |
15 | #include <linux/power_supply.h> | |
5a0e3ad6 | 16 | #include <linux/slab.h> |
778f523d | 17 | #include <linux/stat.h> |
4a11b59d | 18 | |
25f12141 AB |
19 | #include "power_supply.h" |
20 | ||
4a11b59d AV |
21 | /* |
22 | * This is because the name "current" breaks the device attr macro. | |
23 | * The "current" word resolves to "(get_current())" so instead of | |
24 | * "current" "(get_current())" appears in the sysfs. | |
25 | * | |
26 | * The source of this definition is the device.h which calls __ATTR | |
27 | * macro in sysfs.h which calls the __stringify macro. | |
28 | * | |
29 | * Only modification that the name is not tried to be resolved | |
30 | * (as a macro let's say). | |
31 | */ | |
32 | ||
33 | #define POWER_SUPPLY_ATTR(_name) \ | |
34 | { \ | |
5f487cd3 | 35 | .attr = { .name = #_name }, \ |
4a11b59d | 36 | .show = power_supply_show_property, \ |
0011d2d4 | 37 | .store = power_supply_store_property, \ |
4a11b59d AV |
38 | } |
39 | ||
40 | static struct device_attribute power_supply_attrs[]; | |
41 | ||
42 | static ssize_t power_supply_show_property(struct device *dev, | |
43 | struct device_attribute *attr, | |
44 | char *buf) { | |
5f487cd3 | 45 | static char *type_text[] = { |
85efc8a1 HK |
46 | "Battery", "UPS", "Mains", "USB", |
47 | "USB_DCP", "USB_CDP", "USB_ACA" | |
5f487cd3 | 48 | }; |
4a11b59d AV |
49 | static char *status_text[] = { |
50 | "Unknown", "Charging", "Discharging", "Not charging", "Full" | |
51 | }; | |
ee8076ed AS |
52 | static char *charge_type[] = { |
53 | "Unknown", "N/A", "Trickle", "Fast" | |
54 | }; | |
4a11b59d AV |
55 | static char *health_text[] = { |
56 | "Unknown", "Good", "Overheat", "Dead", "Over voltage", | |
7e386e6e | 57 | "Unspecified failure", "Cold", |
4a11b59d AV |
58 | }; |
59 | static char *technology_text[] = { | |
c7cc930f DES |
60 | "Unknown", "NiMH", "Li-ion", "Li-poly", "LiFe", "NiCd", |
61 | "LiMn" | |
4a11b59d | 62 | }; |
b294a290 AS |
63 | static char *capacity_level_text[] = { |
64 | "Unknown", "Critical", "Low", "Normal", "High", "Full" | |
65 | }; | |
5f487cd3 | 66 | ssize_t ret = 0; |
4a11b59d AV |
67 | struct power_supply *psy = dev_get_drvdata(dev); |
68 | const ptrdiff_t off = attr - power_supply_attrs; | |
69 | union power_supply_propval value; | |
70 | ||
5f487cd3 AV |
71 | if (off == POWER_SUPPLY_PROP_TYPE) |
72 | value.intval = psy->type; | |
73 | else | |
74 | ret = psy->get_property(psy, off, &value); | |
4a11b59d AV |
75 | |
76 | if (ret < 0) { | |
9d233e8b AV |
77 | if (ret == -ENODATA) |
78 | dev_dbg(dev, "driver has no data for `%s' property\n", | |
79 | attr->attr.name); | |
80 | else if (ret != -ENODEV) | |
4a11b59d AV |
81 | dev_err(dev, "driver failed to report `%s' property\n", |
82 | attr->attr.name); | |
83 | return ret; | |
84 | } | |
85 | ||
86 | if (off == POWER_SUPPLY_PROP_STATUS) | |
87 | return sprintf(buf, "%s\n", status_text[value.intval]); | |
ee8076ed AS |
88 | else if (off == POWER_SUPPLY_PROP_CHARGE_TYPE) |
89 | return sprintf(buf, "%s\n", charge_type[value.intval]); | |
4a11b59d AV |
90 | else if (off == POWER_SUPPLY_PROP_HEALTH) |
91 | return sprintf(buf, "%s\n", health_text[value.intval]); | |
92 | else if (off == POWER_SUPPLY_PROP_TECHNOLOGY) | |
93 | return sprintf(buf, "%s\n", technology_text[value.intval]); | |
b294a290 AS |
94 | else if (off == POWER_SUPPLY_PROP_CAPACITY_LEVEL) |
95 | return sprintf(buf, "%s\n", capacity_level_text[value.intval]); | |
5f487cd3 AV |
96 | else if (off == POWER_SUPPLY_PROP_TYPE) |
97 | return sprintf(buf, "%s\n", type_text[value.intval]); | |
4a11b59d AV |
98 | else if (off >= POWER_SUPPLY_PROP_MODEL_NAME) |
99 | return sprintf(buf, "%s\n", value.strval); | |
100 | ||
101 | return sprintf(buf, "%d\n", value.intval); | |
102 | } | |
103 | ||
0011d2d4 DM |
104 | static ssize_t power_supply_store_property(struct device *dev, |
105 | struct device_attribute *attr, | |
106 | const char *buf, size_t count) { | |
107 | ssize_t ret; | |
108 | struct power_supply *psy = dev_get_drvdata(dev); | |
109 | const ptrdiff_t off = attr - power_supply_attrs; | |
110 | union power_supply_propval value; | |
111 | long long_val; | |
112 | ||
113 | /* TODO: support other types than int */ | |
114 | ret = strict_strtol(buf, 10, &long_val); | |
115 | if (ret < 0) | |
116 | return ret; | |
117 | ||
118 | value.intval = long_val; | |
119 | ||
120 | ret = psy->set_property(psy, off, &value); | |
121 | if (ret < 0) | |
122 | return ret; | |
123 | ||
124 | return count; | |
125 | } | |
126 | ||
4a11b59d AV |
127 | /* Must be in the same order as POWER_SUPPLY_PROP_* */ |
128 | static struct device_attribute power_supply_attrs[] = { | |
129 | /* Properties of type `int' */ | |
130 | POWER_SUPPLY_ATTR(status), | |
ee8076ed | 131 | POWER_SUPPLY_ATTR(charge_type), |
4a11b59d AV |
132 | POWER_SUPPLY_ATTR(health), |
133 | POWER_SUPPLY_ATTR(present), | |
134 | POWER_SUPPLY_ATTR(online), | |
135 | POWER_SUPPLY_ATTR(technology), | |
c955fe8e | 136 | POWER_SUPPLY_ATTR(cycle_count), |
c7cc930f DES |
137 | POWER_SUPPLY_ATTR(voltage_max), |
138 | POWER_SUPPLY_ATTR(voltage_min), | |
4a11b59d AV |
139 | POWER_SUPPLY_ATTR(voltage_max_design), |
140 | POWER_SUPPLY_ATTR(voltage_min_design), | |
141 | POWER_SUPPLY_ATTR(voltage_now), | |
142 | POWER_SUPPLY_ATTR(voltage_avg), | |
fe3f6d09 | 143 | POWER_SUPPLY_ATTR(current_max), |
4a11b59d AV |
144 | POWER_SUPPLY_ATTR(current_now), |
145 | POWER_SUPPLY_ATTR(current_avg), | |
7faa144a AS |
146 | POWER_SUPPLY_ATTR(power_now), |
147 | POWER_SUPPLY_ATTR(power_avg), | |
4a11b59d AV |
148 | POWER_SUPPLY_ATTR(charge_full_design), |
149 | POWER_SUPPLY_ATTR(charge_empty_design), | |
150 | POWER_SUPPLY_ATTR(charge_full), | |
151 | POWER_SUPPLY_ATTR(charge_empty), | |
152 | POWER_SUPPLY_ATTR(charge_now), | |
153 | POWER_SUPPLY_ATTR(charge_avg), | |
8e552c36 | 154 | POWER_SUPPLY_ATTR(charge_counter), |
4a11b59d AV |
155 | POWER_SUPPLY_ATTR(energy_full_design), |
156 | POWER_SUPPLY_ATTR(energy_empty_design), | |
157 | POWER_SUPPLY_ATTR(energy_full), | |
158 | POWER_SUPPLY_ATTR(energy_empty), | |
159 | POWER_SUPPLY_ATTR(energy_now), | |
160 | POWER_SUPPLY_ATTR(energy_avg), | |
161 | POWER_SUPPLY_ATTR(capacity), | |
b294a290 | 162 | POWER_SUPPLY_ATTR(capacity_level), |
4a11b59d AV |
163 | POWER_SUPPLY_ATTR(temp), |
164 | POWER_SUPPLY_ATTR(temp_ambient), | |
165 | POWER_SUPPLY_ATTR(time_to_empty_now), | |
166 | POWER_SUPPLY_ATTR(time_to_empty_avg), | |
167 | POWER_SUPPLY_ATTR(time_to_full_now), | |
168 | POWER_SUPPLY_ATTR(time_to_full_avg), | |
5f487cd3 | 169 | POWER_SUPPLY_ATTR(type), |
4a11b59d AV |
170 | /* Properties of type `const char *' */ |
171 | POWER_SUPPLY_ATTR(model_name), | |
172 | POWER_SUPPLY_ATTR(manufacturer), | |
7c2670bb | 173 | POWER_SUPPLY_ATTR(serial_number), |
4a11b59d AV |
174 | }; |
175 | ||
5f487cd3 AV |
176 | static struct attribute * |
177 | __power_supply_attrs[ARRAY_SIZE(power_supply_attrs) + 1]; | |
4a11b59d | 178 | |
5f487cd3 AV |
179 | static mode_t power_supply_attr_is_visible(struct kobject *kobj, |
180 | struct attribute *attr, | |
181 | int attrno) | |
4a11b59d | 182 | { |
5f487cd3 AV |
183 | struct device *dev = container_of(kobj, struct device, kobj); |
184 | struct power_supply *psy = dev_get_drvdata(dev); | |
bbabb158 | 185 | mode_t mode = S_IRUSR | S_IRGRP | S_IROTH; |
5f487cd3 | 186 | int i; |
4a11b59d | 187 | |
bbabb158 DM |
188 | if (attrno == POWER_SUPPLY_PROP_TYPE) |
189 | return mode; | |
190 | ||
5f487cd3 | 191 | for (i = 0; i < psy->num_properties; i++) { |
0011d2d4 DM |
192 | int property = psy->properties[i]; |
193 | ||
194 | if (property == attrno) { | |
0011d2d4 DM |
195 | if (psy->property_is_writeable && |
196 | psy->property_is_writeable(psy, property) > 0) | |
197 | mode |= S_IWUSR; | |
198 | ||
199 | return mode; | |
200 | } | |
4a11b59d AV |
201 | } |
202 | ||
5f487cd3 | 203 | return 0; |
4a11b59d AV |
204 | } |
205 | ||
5f487cd3 AV |
206 | static struct attribute_group power_supply_attr_group = { |
207 | .attrs = __power_supply_attrs, | |
208 | .is_visible = power_supply_attr_is_visible, | |
209 | }; | |
210 | ||
211 | static const struct attribute_group *power_supply_attr_groups[] = { | |
212 | &power_supply_attr_group, | |
213 | NULL, | |
214 | }; | |
215 | ||
216 | void power_supply_init_attrs(struct device_type *dev_type) | |
4a11b59d AV |
217 | { |
218 | int i; | |
219 | ||
5f487cd3 | 220 | dev_type->groups = power_supply_attr_groups; |
4a11b59d | 221 | |
5f487cd3 AV |
222 | for (i = 0; i < ARRAY_SIZE(power_supply_attrs); i++) |
223 | __power_supply_attrs[i] = &power_supply_attrs[i].attr; | |
4a11b59d AV |
224 | } |
225 | ||
226 | static char *kstruprdup(const char *str, gfp_t gfp) | |
227 | { | |
228 | char *ret, *ustr; | |
229 | ||
230 | ustr = ret = kmalloc(strlen(str) + 1, gfp); | |
231 | ||
232 | if (!ret) | |
233 | return NULL; | |
234 | ||
235 | while (*str) | |
236 | *ustr++ = toupper(*str++); | |
237 | ||
238 | *ustr = 0; | |
239 | ||
240 | return ret; | |
241 | } | |
242 | ||
7eff2e7a | 243 | int power_supply_uevent(struct device *dev, struct kobj_uevent_env *env) |
4a11b59d AV |
244 | { |
245 | struct power_supply *psy = dev_get_drvdata(dev); | |
7eff2e7a | 246 | int ret = 0, j; |
4a11b59d AV |
247 | char *prop_buf; |
248 | char *attrname; | |
249 | ||
250 | dev_dbg(dev, "uevent\n"); | |
251 | ||
56fa18e8 | 252 | if (!psy || !psy->dev) { |
4a11b59d AV |
253 | dev_dbg(dev, "No power supply yet\n"); |
254 | return ret; | |
255 | } | |
256 | ||
257 | dev_dbg(dev, "POWER_SUPPLY_NAME=%s\n", psy->name); | |
258 | ||
7eff2e7a | 259 | ret = add_uevent_var(env, "POWER_SUPPLY_NAME=%s", psy->name); |
4a11b59d AV |
260 | if (ret) |
261 | return ret; | |
262 | ||
263 | prop_buf = (char *)get_zeroed_page(GFP_KERNEL); | |
264 | if (!prop_buf) | |
265 | return -ENOMEM; | |
266 | ||
4a11b59d AV |
267 | for (j = 0; j < psy->num_properties; j++) { |
268 | struct device_attribute *attr; | |
269 | char *line; | |
270 | ||
271 | attr = &power_supply_attrs[psy->properties[j]]; | |
272 | ||
273 | ret = power_supply_show_property(dev, attr, prop_buf); | |
f722e17f | 274 | if (ret == -ENODEV || ret == -ENODATA) { |
4a11b59d AV |
275 | /* When a battery is absent, we expect -ENODEV. Don't abort; |
276 | send the uevent with at least the the PRESENT=0 property */ | |
277 | ret = 0; | |
278 | continue; | |
279 | } | |
280 | ||
281 | if (ret < 0) | |
282 | goto out; | |
283 | ||
284 | line = strchr(prop_buf, '\n'); | |
285 | if (line) | |
286 | *line = 0; | |
287 | ||
288 | attrname = kstruprdup(attr->attr.name, GFP_KERNEL); | |
289 | if (!attrname) { | |
290 | ret = -ENOMEM; | |
291 | goto out; | |
292 | } | |
293 | ||
294 | dev_dbg(dev, "prop %s=%s\n", attrname, prop_buf); | |
295 | ||
7eff2e7a | 296 | ret = add_uevent_var(env, "POWER_SUPPLY_%s=%s", attrname, prop_buf); |
4a11b59d AV |
297 | kfree(attrname); |
298 | if (ret) | |
299 | goto out; | |
300 | } | |
301 | ||
302 | out: | |
303 | free_page((unsigned long)prop_buf); | |
304 | ||
305 | return ret; | |
306 | } |