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> | |
16 | ||
25f12141 AB |
17 | #include "power_supply.h" |
18 | ||
4a11b59d AV |
19 | /* |
20 | * This is because the name "current" breaks the device attr macro. | |
21 | * The "current" word resolves to "(get_current())" so instead of | |
22 | * "current" "(get_current())" appears in the sysfs. | |
23 | * | |
24 | * The source of this definition is the device.h which calls __ATTR | |
25 | * macro in sysfs.h which calls the __stringify macro. | |
26 | * | |
27 | * Only modification that the name is not tried to be resolved | |
28 | * (as a macro let's say). | |
29 | */ | |
30 | ||
31 | #define POWER_SUPPLY_ATTR(_name) \ | |
32 | { \ | |
01e8ef11 | 33 | .attr = { .name = #_name, .mode = 0444 }, \ |
4a11b59d AV |
34 | .show = power_supply_show_property, \ |
35 | .store = NULL, \ | |
36 | } | |
37 | ||
38 | static struct device_attribute power_supply_attrs[]; | |
39 | ||
40 | static ssize_t power_supply_show_property(struct device *dev, | |
41 | struct device_attribute *attr, | |
42 | char *buf) { | |
43 | static char *status_text[] = { | |
44 | "Unknown", "Charging", "Discharging", "Not charging", "Full" | |
45 | }; | |
ee8076ed AS |
46 | static char *charge_type[] = { |
47 | "Unknown", "N/A", "Trickle", "Fast" | |
48 | }; | |
4a11b59d AV |
49 | static char *health_text[] = { |
50 | "Unknown", "Good", "Overheat", "Dead", "Over voltage", | |
7e386e6e | 51 | "Unspecified failure", "Cold", |
4a11b59d AV |
52 | }; |
53 | static char *technology_text[] = { | |
c7cc930f DB |
54 | "Unknown", "NiMH", "Li-ion", "Li-poly", "LiFe", "NiCd", |
55 | "LiMn" | |
4a11b59d | 56 | }; |
b294a290 AS |
57 | static char *capacity_level_text[] = { |
58 | "Unknown", "Critical", "Low", "Normal", "High", "Full" | |
59 | }; | |
4a11b59d AV |
60 | ssize_t ret; |
61 | struct power_supply *psy = dev_get_drvdata(dev); | |
62 | const ptrdiff_t off = attr - power_supply_attrs; | |
63 | union power_supply_propval value; | |
64 | ||
65 | ret = psy->get_property(psy, off, &value); | |
66 | ||
67 | if (ret < 0) { | |
9d233e8b AV |
68 | if (ret == -ENODATA) |
69 | dev_dbg(dev, "driver has no data for `%s' property\n", | |
70 | attr->attr.name); | |
71 | else if (ret != -ENODEV) | |
4a11b59d AV |
72 | dev_err(dev, "driver failed to report `%s' property\n", |
73 | attr->attr.name); | |
74 | return ret; | |
75 | } | |
76 | ||
77 | if (off == POWER_SUPPLY_PROP_STATUS) | |
78 | return sprintf(buf, "%s\n", status_text[value.intval]); | |
ee8076ed AS |
79 | else if (off == POWER_SUPPLY_PROP_CHARGE_TYPE) |
80 | return sprintf(buf, "%s\n", charge_type[value.intval]); | |
4a11b59d AV |
81 | else if (off == POWER_SUPPLY_PROP_HEALTH) |
82 | return sprintf(buf, "%s\n", health_text[value.intval]); | |
83 | else if (off == POWER_SUPPLY_PROP_TECHNOLOGY) | |
84 | return sprintf(buf, "%s\n", technology_text[value.intval]); | |
b294a290 AS |
85 | else if (off == POWER_SUPPLY_PROP_CAPACITY_LEVEL) |
86 | return sprintf(buf, "%s\n", capacity_level_text[value.intval]); | |
4a11b59d AV |
87 | else if (off >= POWER_SUPPLY_PROP_MODEL_NAME) |
88 | return sprintf(buf, "%s\n", value.strval); | |
89 | ||
90 | return sprintf(buf, "%d\n", value.intval); | |
91 | } | |
92 | ||
93 | /* Must be in the same order as POWER_SUPPLY_PROP_* */ | |
94 | static struct device_attribute power_supply_attrs[] = { | |
95 | /* Properties of type `int' */ | |
96 | POWER_SUPPLY_ATTR(status), | |
ee8076ed | 97 | POWER_SUPPLY_ATTR(charge_type), |
4a11b59d AV |
98 | POWER_SUPPLY_ATTR(health), |
99 | POWER_SUPPLY_ATTR(present), | |
100 | POWER_SUPPLY_ATTR(online), | |
101 | POWER_SUPPLY_ATTR(technology), | |
c955fe8e | 102 | POWER_SUPPLY_ATTR(cycle_count), |
c7cc930f DB |
103 | POWER_SUPPLY_ATTR(voltage_max), |
104 | POWER_SUPPLY_ATTR(voltage_min), | |
4a11b59d AV |
105 | POWER_SUPPLY_ATTR(voltage_max_design), |
106 | POWER_SUPPLY_ATTR(voltage_min_design), | |
107 | POWER_SUPPLY_ATTR(voltage_now), | |
108 | POWER_SUPPLY_ATTR(voltage_avg), | |
109 | POWER_SUPPLY_ATTR(current_now), | |
110 | POWER_SUPPLY_ATTR(current_avg), | |
7faa144a AS |
111 | POWER_SUPPLY_ATTR(power_now), |
112 | POWER_SUPPLY_ATTR(power_avg), | |
4a11b59d AV |
113 | POWER_SUPPLY_ATTR(charge_full_design), |
114 | POWER_SUPPLY_ATTR(charge_empty_design), | |
115 | POWER_SUPPLY_ATTR(charge_full), | |
116 | POWER_SUPPLY_ATTR(charge_empty), | |
117 | POWER_SUPPLY_ATTR(charge_now), | |
118 | POWER_SUPPLY_ATTR(charge_avg), | |
8e552c36 | 119 | POWER_SUPPLY_ATTR(charge_counter), |
4a11b59d AV |
120 | POWER_SUPPLY_ATTR(energy_full_design), |
121 | POWER_SUPPLY_ATTR(energy_empty_design), | |
122 | POWER_SUPPLY_ATTR(energy_full), | |
123 | POWER_SUPPLY_ATTR(energy_empty), | |
124 | POWER_SUPPLY_ATTR(energy_now), | |
125 | POWER_SUPPLY_ATTR(energy_avg), | |
126 | POWER_SUPPLY_ATTR(capacity), | |
b294a290 | 127 | POWER_SUPPLY_ATTR(capacity_level), |
4a11b59d AV |
128 | POWER_SUPPLY_ATTR(temp), |
129 | POWER_SUPPLY_ATTR(temp_ambient), | |
130 | POWER_SUPPLY_ATTR(time_to_empty_now), | |
131 | POWER_SUPPLY_ATTR(time_to_empty_avg), | |
132 | POWER_SUPPLY_ATTR(time_to_full_now), | |
133 | POWER_SUPPLY_ATTR(time_to_full_avg), | |
134 | /* Properties of type `const char *' */ | |
135 | POWER_SUPPLY_ATTR(model_name), | |
136 | POWER_SUPPLY_ATTR(manufacturer), | |
7c2670bb | 137 | POWER_SUPPLY_ATTR(serial_number), |
4a11b59d AV |
138 | }; |
139 | ||
140 | static ssize_t power_supply_show_static_attrs(struct device *dev, | |
141 | struct device_attribute *attr, | |
142 | char *buf) { | |
143 | static char *type_text[] = { "Battery", "UPS", "Mains", "USB" }; | |
144 | struct power_supply *psy = dev_get_drvdata(dev); | |
145 | ||
146 | return sprintf(buf, "%s\n", type_text[psy->type]); | |
147 | } | |
148 | ||
149 | static struct device_attribute power_supply_static_attrs[] = { | |
150 | __ATTR(type, 0444, power_supply_show_static_attrs, NULL), | |
151 | }; | |
152 | ||
153 | int power_supply_create_attrs(struct power_supply *psy) | |
154 | { | |
155 | int rc = 0; | |
156 | int i, j; | |
157 | ||
158 | for (i = 0; i < ARRAY_SIZE(power_supply_static_attrs); i++) { | |
159 | rc = device_create_file(psy->dev, | |
160 | &power_supply_static_attrs[i]); | |
161 | if (rc) | |
162 | goto statics_failed; | |
163 | } | |
164 | ||
165 | for (j = 0; j < psy->num_properties; j++) { | |
166 | rc = device_create_file(psy->dev, | |
167 | &power_supply_attrs[psy->properties[j]]); | |
168 | if (rc) | |
169 | goto dynamics_failed; | |
170 | } | |
171 | ||
172 | goto succeed; | |
173 | ||
174 | dynamics_failed: | |
175 | while (j--) | |
176 | device_remove_file(psy->dev, | |
177 | &power_supply_attrs[psy->properties[j]]); | |
178 | statics_failed: | |
179 | while (i--) | |
839dc9f1 | 180 | device_remove_file(psy->dev, &power_supply_static_attrs[i]); |
4a11b59d AV |
181 | succeed: |
182 | return rc; | |
183 | } | |
184 | ||
185 | void power_supply_remove_attrs(struct power_supply *psy) | |
186 | { | |
187 | int i; | |
188 | ||
189 | for (i = 0; i < ARRAY_SIZE(power_supply_static_attrs); i++) | |
839dc9f1 | 190 | device_remove_file(psy->dev, &power_supply_static_attrs[i]); |
4a11b59d AV |
191 | |
192 | for (i = 0; i < psy->num_properties; i++) | |
193 | device_remove_file(psy->dev, | |
194 | &power_supply_attrs[psy->properties[i]]); | |
4a11b59d AV |
195 | } |
196 | ||
197 | static char *kstruprdup(const char *str, gfp_t gfp) | |
198 | { | |
199 | char *ret, *ustr; | |
200 | ||
201 | ustr = ret = kmalloc(strlen(str) + 1, gfp); | |
202 | ||
203 | if (!ret) | |
204 | return NULL; | |
205 | ||
206 | while (*str) | |
207 | *ustr++ = toupper(*str++); | |
208 | ||
209 | *ustr = 0; | |
210 | ||
211 | return ret; | |
212 | } | |
213 | ||
7eff2e7a | 214 | int power_supply_uevent(struct device *dev, struct kobj_uevent_env *env) |
4a11b59d AV |
215 | { |
216 | struct power_supply *psy = dev_get_drvdata(dev); | |
7eff2e7a | 217 | int ret = 0, j; |
4a11b59d AV |
218 | char *prop_buf; |
219 | char *attrname; | |
220 | ||
221 | dev_dbg(dev, "uevent\n"); | |
222 | ||
56fa18e8 | 223 | if (!psy || !psy->dev) { |
4a11b59d AV |
224 | dev_dbg(dev, "No power supply yet\n"); |
225 | return ret; | |
226 | } | |
227 | ||
228 | dev_dbg(dev, "POWER_SUPPLY_NAME=%s\n", psy->name); | |
229 | ||
7eff2e7a | 230 | ret = add_uevent_var(env, "POWER_SUPPLY_NAME=%s", psy->name); |
4a11b59d AV |
231 | if (ret) |
232 | return ret; | |
233 | ||
234 | prop_buf = (char *)get_zeroed_page(GFP_KERNEL); | |
235 | if (!prop_buf) | |
236 | return -ENOMEM; | |
237 | ||
238 | for (j = 0; j < ARRAY_SIZE(power_supply_static_attrs); j++) { | |
239 | struct device_attribute *attr; | |
240 | char *line; | |
241 | ||
242 | attr = &power_supply_static_attrs[j]; | |
243 | ||
244 | ret = power_supply_show_static_attrs(dev, attr, prop_buf); | |
245 | if (ret < 0) | |
246 | goto out; | |
247 | ||
248 | line = strchr(prop_buf, '\n'); | |
249 | if (line) | |
250 | *line = 0; | |
251 | ||
252 | attrname = kstruprdup(attr->attr.name, GFP_KERNEL); | |
253 | if (!attrname) { | |
254 | ret = -ENOMEM; | |
255 | goto out; | |
256 | } | |
257 | ||
258 | dev_dbg(dev, "Static prop %s=%s\n", attrname, prop_buf); | |
259 | ||
7eff2e7a | 260 | ret = add_uevent_var(env, "POWER_SUPPLY_%s=%s", attrname, prop_buf); |
4a11b59d AV |
261 | kfree(attrname); |
262 | if (ret) | |
263 | goto out; | |
264 | } | |
265 | ||
266 | dev_dbg(dev, "%zd dynamic props\n", psy->num_properties); | |
267 | ||
268 | for (j = 0; j < psy->num_properties; j++) { | |
269 | struct device_attribute *attr; | |
270 | char *line; | |
271 | ||
272 | attr = &power_supply_attrs[psy->properties[j]]; | |
273 | ||
274 | ret = power_supply_show_property(dev, attr, prop_buf); | |
275 | if (ret == -ENODEV) { | |
276 | /* When a battery is absent, we expect -ENODEV. Don't abort; | |
277 | send the uevent with at least the the PRESENT=0 property */ | |
278 | ret = 0; | |
279 | continue; | |
280 | } | |
281 | ||
282 | if (ret < 0) | |
283 | goto out; | |
284 | ||
285 | line = strchr(prop_buf, '\n'); | |
286 | if (line) | |
287 | *line = 0; | |
288 | ||
289 | attrname = kstruprdup(attr->attr.name, GFP_KERNEL); | |
290 | if (!attrname) { | |
291 | ret = -ENOMEM; | |
292 | goto out; | |
293 | } | |
294 | ||
295 | dev_dbg(dev, "prop %s=%s\n", attrname, prop_buf); | |
296 | ||
7eff2e7a | 297 | ret = add_uevent_var(env, "POWER_SUPPLY_%s=%s", attrname, prop_buf); |
4a11b59d AV |
298 | kfree(attrname); |
299 | if (ret) | |
300 | goto out; | |
301 | } | |
302 | ||
303 | out: | |
304 | free_page((unsigned long)prop_buf); | |
305 | ||
306 | return ret; | |
307 | } |