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