1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22#include <linux/kernel.h>
23#include <linux/module.h>
24#include <linux/slab.h>
25#include <linux/init.h>
26#include <linux/types.h>
27#include <linux/dmi.h>
28#include <linux/delay.h>
29#ifdef CONFIG_ACPI_PROCFS_POWER
30#include <linux/proc_fs.h>
31#include <linux/seq_file.h>
32#endif
33#include <linux/platform_device.h>
34#include <linux/power_supply.h>
35#include <linux/acpi.h>
36#include "battery.h"
37
38#define PREFIX "ACPI: "
39
40#define ACPI_AC_CLASS "ac_adapter"
41#define ACPI_AC_DEVICE_NAME "AC Adapter"
42#define ACPI_AC_FILE_STATE "state"
43#define ACPI_AC_NOTIFY_STATUS 0x80
44#define ACPI_AC_STATUS_OFFLINE 0x00
45#define ACPI_AC_STATUS_ONLINE 0x01
46#define ACPI_AC_STATUS_UNKNOWN 0xFF
47
48#define _COMPONENT ACPI_AC_COMPONENT
49ACPI_MODULE_NAME("ac");
50
51MODULE_AUTHOR("Paul Diefenbaugh");
52MODULE_DESCRIPTION("ACPI AC Adapter Driver");
53MODULE_LICENSE("GPL");
54
55
56static int acpi_ac_add(struct acpi_device *device);
57static int acpi_ac_remove(struct acpi_device *device);
58static void acpi_ac_notify(struct acpi_device *device, u32 event);
59
60static const struct acpi_device_id ac_device_ids[] = {
61 {"ACPI0003", 0},
62 {"", 0},
63};
64MODULE_DEVICE_TABLE(acpi, ac_device_ids);
65
66#ifdef CONFIG_PM_SLEEP
67static int acpi_ac_resume(struct device *dev);
68#endif
69static SIMPLE_DEV_PM_OPS(acpi_ac_pm, NULL, acpi_ac_resume);
70
71#ifdef CONFIG_ACPI_PROCFS_POWER
72extern struct proc_dir_entry *acpi_lock_ac_dir(void);
73extern void *acpi_unlock_ac_dir(struct proc_dir_entry *acpi_ac_dir);
74static int acpi_ac_open_fs(struct inode *inode, struct file *file);
75#endif
76
77
78static int ac_sleep_before_get_state_ms;
79
80static struct acpi_driver acpi_ac_driver = {
81 .name = "ac",
82 .class = ACPI_AC_CLASS,
83 .ids = ac_device_ids,
84 .flags = ACPI_DRIVER_ALL_NOTIFY_EVENTS,
85 .ops = {
86 .add = acpi_ac_add,
87 .remove = acpi_ac_remove,
88 .notify = acpi_ac_notify,
89 },
90 .drv.pm = &acpi_ac_pm,
91};
92
93struct acpi_ac {
94 struct power_supply *charger;
95 struct power_supply_desc charger_desc;
96 struct acpi_device * device;
97 unsigned long long state;
98 struct notifier_block battery_nb;
99};
100
101#define to_acpi_ac(x) power_supply_get_drvdata(x)
102
103#ifdef CONFIG_ACPI_PROCFS_POWER
104static const struct file_operations acpi_ac_fops = {
105 .owner = THIS_MODULE,
106 .open = acpi_ac_open_fs,
107 .read = seq_read,
108 .llseek = seq_lseek,
109 .release = single_release,
110};
111#endif
112
113
114
115
116
117static int acpi_ac_get_state(struct acpi_ac *ac)
118{
119 acpi_status status = AE_OK;
120
121 if (!ac)
122 return -EINVAL;
123
124 status = acpi_evaluate_integer(ac->device->handle, "_PSR", NULL,
125 &ac->state);
126 if (ACPI_FAILURE(status)) {
127 ACPI_EXCEPTION((AE_INFO, status,
128 "Error reading AC Adapter state"));
129 ac->state = ACPI_AC_STATUS_UNKNOWN;
130 return -ENODEV;
131 }
132
133 return 0;
134}
135
136
137
138
139static int get_ac_property(struct power_supply *psy,
140 enum power_supply_property psp,
141 union power_supply_propval *val)
142{
143 struct acpi_ac *ac = to_acpi_ac(psy);
144
145 if (!ac)
146 return -ENODEV;
147
148 if (acpi_ac_get_state(ac))
149 return -ENODEV;
150
151 switch (psp) {
152 case POWER_SUPPLY_PROP_ONLINE:
153 val->intval = ac->state;
154 break;
155 default:
156 return -EINVAL;
157 }
158 return 0;
159}
160
161static enum power_supply_property ac_props[] = {
162 POWER_SUPPLY_PROP_ONLINE,
163};
164
165#ifdef CONFIG_ACPI_PROCFS_POWER
166
167
168
169
170static struct proc_dir_entry *acpi_ac_dir;
171
172static int acpi_ac_seq_show(struct seq_file *seq, void *offset)
173{
174 struct acpi_ac *ac = seq->private;
175
176
177 if (!ac)
178 return 0;
179
180 if (acpi_ac_get_state(ac)) {
181 seq_puts(seq, "ERROR: Unable to read AC Adapter state\n");
182 return 0;
183 }
184
185 seq_puts(seq, "state: ");
186 switch (ac->state) {
187 case ACPI_AC_STATUS_OFFLINE:
188 seq_puts(seq, "off-line\n");
189 break;
190 case ACPI_AC_STATUS_ONLINE:
191 seq_puts(seq, "on-line\n");
192 break;
193 default:
194 seq_puts(seq, "unknown\n");
195 break;
196 }
197
198 return 0;
199}
200
201static int acpi_ac_open_fs(struct inode *inode, struct file *file)
202{
203 return single_open(file, acpi_ac_seq_show, PDE_DATA(inode));
204}
205
206static int acpi_ac_add_fs(struct acpi_ac *ac)
207{
208 struct proc_dir_entry *entry = NULL;
209
210 printk(KERN_WARNING PREFIX "Deprecated procfs I/F for AC is loaded,"
211 " please retry with CONFIG_ACPI_PROCFS_POWER cleared\n");
212 if (!acpi_device_dir(ac->device)) {
213 acpi_device_dir(ac->device) =
214 proc_mkdir(acpi_device_bid(ac->device), acpi_ac_dir);
215 if (!acpi_device_dir(ac->device))
216 return -ENODEV;
217 }
218
219
220 entry = proc_create_data(ACPI_AC_FILE_STATE,
221 S_IRUGO, acpi_device_dir(ac->device),
222 &acpi_ac_fops, ac);
223 if (!entry)
224 return -ENODEV;
225 return 0;
226}
227
228static int acpi_ac_remove_fs(struct acpi_ac *ac)
229{
230
231 if (acpi_device_dir(ac->device)) {
232 remove_proc_entry(ACPI_AC_FILE_STATE,
233 acpi_device_dir(ac->device));
234 remove_proc_entry(acpi_device_bid(ac->device), acpi_ac_dir);
235 acpi_device_dir(ac->device) = NULL;
236 }
237
238 return 0;
239}
240#endif
241
242
243
244
245
246static void acpi_ac_notify(struct acpi_device *device, u32 event)
247{
248 struct acpi_ac *ac = acpi_driver_data(device);
249
250 if (!ac)
251 return;
252
253 switch (event) {
254 default:
255 ACPI_DEBUG_PRINT((ACPI_DB_INFO,
256 "Unsupported event [0x%x]\n", event));
257 case ACPI_AC_NOTIFY_STATUS:
258 case ACPI_NOTIFY_BUS_CHECK:
259 case ACPI_NOTIFY_DEVICE_CHECK:
260
261
262
263
264
265
266
267 if (ac_sleep_before_get_state_ms > 0)
268 msleep(ac_sleep_before_get_state_ms);
269
270 acpi_ac_get_state(ac);
271 acpi_bus_generate_netlink_event(device->pnp.device_class,
272 dev_name(&device->dev), event,
273 (u32) ac->state);
274 acpi_notifier_call_chain(device, event, (u32) ac->state);
275 kobject_uevent(&ac->charger->dev.kobj, KOBJ_CHANGE);
276 }
277
278 return;
279}
280
281static int acpi_ac_battery_notify(struct notifier_block *nb,
282 unsigned long action, void *data)
283{
284 struct acpi_ac *ac = container_of(nb, struct acpi_ac, battery_nb);
285 struct acpi_bus_event *event = (struct acpi_bus_event *)data;
286
287
288
289
290
291
292
293
294 if (strcmp(event->device_class, ACPI_BATTERY_CLASS) == 0 &&
295 event->type == ACPI_BATTERY_NOTIFY_STATUS)
296 acpi_ac_get_state(ac);
297
298 return NOTIFY_OK;
299}
300
301static int thinkpad_e530_quirk(const struct dmi_system_id *d)
302{
303 ac_sleep_before_get_state_ms = 1000;
304 return 0;
305}
306
307static const struct dmi_system_id ac_dmi_table[] = {
308 {
309 .callback = thinkpad_e530_quirk,
310 .ident = "thinkpad e530",
311 .matches = {
312 DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
313 DMI_MATCH(DMI_PRODUCT_NAME, "32597CG"),
314 },
315 },
316 {},
317};
318
319static int acpi_ac_add(struct acpi_device *device)
320{
321 struct power_supply_config psy_cfg = {};
322 int result = 0;
323 struct acpi_ac *ac = NULL;
324
325
326 if (!device)
327 return -EINVAL;
328
329 ac = kzalloc(sizeof(struct acpi_ac), GFP_KERNEL);
330 if (!ac)
331 return -ENOMEM;
332
333 ac->device = device;
334 strcpy(acpi_device_name(device), ACPI_AC_DEVICE_NAME);
335 strcpy(acpi_device_class(device), ACPI_AC_CLASS);
336 device->driver_data = ac;
337
338 result = acpi_ac_get_state(ac);
339 if (result)
340 goto end;
341
342 psy_cfg.drv_data = ac;
343
344 ac->charger_desc.name = acpi_device_bid(device);
345#ifdef CONFIG_ACPI_PROCFS_POWER
346 result = acpi_ac_add_fs(ac);
347 if (result)
348 goto end;
349#endif
350 ac->charger_desc.type = POWER_SUPPLY_TYPE_MAINS;
351 ac->charger_desc.properties = ac_props;
352 ac->charger_desc.num_properties = ARRAY_SIZE(ac_props);
353 ac->charger_desc.get_property = get_ac_property;
354 ac->charger = power_supply_register(&ac->device->dev,
355 &ac->charger_desc, &psy_cfg);
356 if (IS_ERR(ac->charger)) {
357 result = PTR_ERR(ac->charger);
358 goto end;
359 }
360
361 printk(KERN_INFO PREFIX "%s [%s] (%s)\n",
362 acpi_device_name(device), acpi_device_bid(device),
363 ac->state ? "on-line" : "off-line");
364
365 ac->battery_nb.notifier_call = acpi_ac_battery_notify;
366 register_acpi_notifier(&ac->battery_nb);
367end:
368 if (result) {
369#ifdef CONFIG_ACPI_PROCFS_POWER
370 acpi_ac_remove_fs(ac);
371#endif
372 kfree(ac);
373 }
374
375 dmi_check_system(ac_dmi_table);
376 return result;
377}
378
379#ifdef CONFIG_PM_SLEEP
380static int acpi_ac_resume(struct device *dev)
381{
382 struct acpi_ac *ac;
383 unsigned old_state;
384
385 if (!dev)
386 return -EINVAL;
387
388 ac = acpi_driver_data(to_acpi_device(dev));
389 if (!ac)
390 return -EINVAL;
391
392 old_state = ac->state;
393 if (acpi_ac_get_state(ac))
394 return 0;
395 if (old_state != ac->state)
396 kobject_uevent(&ac->charger->dev.kobj, KOBJ_CHANGE);
397 return 0;
398}
399#else
400#define acpi_ac_resume NULL
401#endif
402
403static int acpi_ac_remove(struct acpi_device *device)
404{
405 struct acpi_ac *ac = NULL;
406
407
408 if (!device || !acpi_driver_data(device))
409 return -EINVAL;
410
411 ac = acpi_driver_data(device);
412
413 power_supply_unregister(ac->charger);
414 unregister_acpi_notifier(&ac->battery_nb);
415
416#ifdef CONFIG_ACPI_PROCFS_POWER
417 acpi_ac_remove_fs(ac);
418#endif
419
420 kfree(ac);
421
422 return 0;
423}
424
425static int __init acpi_ac_init(void)
426{
427 int result;
428
429 if (acpi_disabled)
430 return -ENODEV;
431
432#ifdef CONFIG_ACPI_PROCFS_POWER
433 acpi_ac_dir = acpi_lock_ac_dir();
434 if (!acpi_ac_dir)
435 return -ENODEV;
436#endif
437
438
439 result = acpi_bus_register_driver(&acpi_ac_driver);
440 if (result < 0) {
441#ifdef CONFIG_ACPI_PROCFS_POWER
442 acpi_unlock_ac_dir(acpi_ac_dir);
443#endif
444 return -ENODEV;
445 }
446
447 return 0;
448}
449
450static void __exit acpi_ac_exit(void)
451{
452 acpi_bus_unregister_driver(&acpi_ac_driver);
453#ifdef CONFIG_ACPI_PROCFS_POWER
454 acpi_unlock_ac_dir(acpi_ac_dir);
455#endif
456}
457module_init(acpi_ac_init);
458module_exit(acpi_ac_exit);
459
