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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 <acpi/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
60struct acpi_ac_bl {
61 const char *hid;
62 int hrv;
63};
64
65static const struct acpi_device_id ac_device_ids[] = {
66 {"ACPI0003", 0},
67 {"", 0},
68};
69MODULE_DEVICE_TABLE(acpi, ac_device_ids);
70
71
72static const struct acpi_ac_bl acpi_ac_blacklist[] = {
73 { "INT33F4", -1 },
74 { "INT34D3", 3 },
75};
76
77#ifdef CONFIG_PM_SLEEP
78static int acpi_ac_resume(struct device *dev);
79#endif
80static SIMPLE_DEV_PM_OPS(acpi_ac_pm, NULL, acpi_ac_resume);
81
82#ifdef CONFIG_ACPI_PROCFS_POWER
83extern struct proc_dir_entry *acpi_lock_ac_dir(void);
84extern void *acpi_unlock_ac_dir(struct proc_dir_entry *acpi_ac_dir);
85static int acpi_ac_open_fs(struct inode *inode, struct file *file);
86#endif
87
88
89static int ac_sleep_before_get_state_ms;
90
91static struct acpi_driver acpi_ac_driver = {
92 .name = "ac",
93 .class = ACPI_AC_CLASS,
94 .ids = ac_device_ids,
95 .flags = ACPI_DRIVER_ALL_NOTIFY_EVENTS,
96 .ops = {
97 .add = acpi_ac_add,
98 .remove = acpi_ac_remove,
99 .notify = acpi_ac_notify,
100 },
101 .drv.pm = &acpi_ac_pm,
102};
103
104struct acpi_ac {
105 struct power_supply *charger;
106 struct power_supply_desc charger_desc;
107 struct acpi_device * device;
108 unsigned long long state;
109 struct notifier_block battery_nb;
110};
111
112#define to_acpi_ac(x) power_supply_get_drvdata(x)
113
114#ifdef CONFIG_ACPI_PROCFS_POWER
115static const struct file_operations acpi_ac_fops = {
116 .owner = THIS_MODULE,
117 .open = acpi_ac_open_fs,
118 .read = seq_read,
119 .llseek = seq_lseek,
120 .release = single_release,
121};
122#endif
123
124
125
126
127
128static int acpi_ac_get_state(struct acpi_ac *ac)
129{
130 acpi_status status = AE_OK;
131
132 if (!ac)
133 return -EINVAL;
134
135 status = acpi_evaluate_integer(ac->device->handle, "_PSR", NULL,
136 &ac->state);
137 if (ACPI_FAILURE(status)) {
138 ACPI_EXCEPTION((AE_INFO, status,
139 "Error reading AC Adapter state"));
140 ac->state = ACPI_AC_STATUS_UNKNOWN;
141 return -ENODEV;
142 }
143
144 return 0;
145}
146
147
148
149
150static int get_ac_property(struct power_supply *psy,
151 enum power_supply_property psp,
152 union power_supply_propval *val)
153{
154 struct acpi_ac *ac = to_acpi_ac(psy);
155
156 if (!ac)
157 return -ENODEV;
158
159 if (acpi_ac_get_state(ac))
160 return -ENODEV;
161
162 switch (psp) {
163 case POWER_SUPPLY_PROP_ONLINE:
164 val->intval = ac->state;
165 break;
166 default:
167 return -EINVAL;
168 }
169 return 0;
170}
171
172static enum power_supply_property ac_props[] = {
173 POWER_SUPPLY_PROP_ONLINE,
174};
175
176#ifdef CONFIG_ACPI_PROCFS_POWER
177
178
179
180
181static struct proc_dir_entry *acpi_ac_dir;
182
183static int acpi_ac_seq_show(struct seq_file *seq, void *offset)
184{
185 struct acpi_ac *ac = seq->private;
186
187
188 if (!ac)
189 return 0;
190
191 if (acpi_ac_get_state(ac)) {
192 seq_puts(seq, "ERROR: Unable to read AC Adapter state\n");
193 return 0;
194 }
195
196 seq_puts(seq, "state: ");
197 switch (ac->state) {
198 case ACPI_AC_STATUS_OFFLINE:
199 seq_puts(seq, "off-line\n");
200 break;
201 case ACPI_AC_STATUS_ONLINE:
202 seq_puts(seq, "on-line\n");
203 break;
204 default:
205 seq_puts(seq, "unknown\n");
206 break;
207 }
208
209 return 0;
210}
211
212static int acpi_ac_open_fs(struct inode *inode, struct file *file)
213{
214 return single_open(file, acpi_ac_seq_show, PDE_DATA(inode));
215}
216
217static int acpi_ac_add_fs(struct acpi_ac *ac)
218{
219 struct proc_dir_entry *entry = NULL;
220
221 printk(KERN_WARNING PREFIX "Deprecated procfs I/F for AC is loaded,"
222 " please retry with CONFIG_ACPI_PROCFS_POWER cleared\n");
223 if (!acpi_device_dir(ac->device)) {
224 acpi_device_dir(ac->device) =
225 proc_mkdir(acpi_device_bid(ac->device), acpi_ac_dir);
226 if (!acpi_device_dir(ac->device))
227 return -ENODEV;
228 }
229
230
231 entry = proc_create_data(ACPI_AC_FILE_STATE,
232 S_IRUGO, acpi_device_dir(ac->device),
233 &acpi_ac_fops, ac);
234 if (!entry)
235 return -ENODEV;
236 return 0;
237}
238
239static int acpi_ac_remove_fs(struct acpi_ac *ac)
240{
241
242 if (acpi_device_dir(ac->device)) {
243 remove_proc_entry(ACPI_AC_FILE_STATE,
244 acpi_device_dir(ac->device));
245 remove_proc_entry(acpi_device_bid(ac->device), acpi_ac_dir);
246 acpi_device_dir(ac->device) = NULL;
247 }
248
249 return 0;
250}
251#endif
252
253
254
255
256
257static void acpi_ac_notify(struct acpi_device *device, u32 event)
258{
259 struct acpi_ac *ac = acpi_driver_data(device);
260
261 if (!ac)
262 return;
263
264 switch (event) {
265 default:
266 ACPI_DEBUG_PRINT((ACPI_DB_INFO,
267 "Unsupported event [0x%x]\n", event));
268
269 case ACPI_AC_NOTIFY_STATUS:
270 case ACPI_NOTIFY_BUS_CHECK:
271 case ACPI_NOTIFY_DEVICE_CHECK:
272
273
274
275
276
277
278
279 if (ac_sleep_before_get_state_ms > 0)
280 msleep(ac_sleep_before_get_state_ms);
281
282 acpi_ac_get_state(ac);
283 acpi_bus_generate_netlink_event(device->pnp.device_class,
284 dev_name(&device->dev), event,
285 (u32) ac->state);
286 acpi_notifier_call_chain(device, event, (u32) ac->state);
287 kobject_uevent(&ac->charger->dev.kobj, KOBJ_CHANGE);
288 }
289
290 return;
291}
292
293static int acpi_ac_battery_notify(struct notifier_block *nb,
294 unsigned long action, void *data)
295{
296 struct acpi_ac *ac = container_of(nb, struct acpi_ac, battery_nb);
297 struct acpi_bus_event *event = (struct acpi_bus_event *)data;
298
299
300
301
302
303
304
305
306 if (strcmp(event->device_class, ACPI_BATTERY_CLASS) == 0 &&
307 event->type == ACPI_BATTERY_NOTIFY_STATUS)
308 acpi_ac_get_state(ac);
309
310 return NOTIFY_OK;
311}
312
313static int thinkpad_e530_quirk(const struct dmi_system_id *d)
314{
315 ac_sleep_before_get_state_ms = 1000;
316 return 0;
317}
318
319static const struct dmi_system_id ac_dmi_table[] = {
320 {
321 .callback = thinkpad_e530_quirk,
322 .ident = "thinkpad e530",
323 .matches = {
324 DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
325 DMI_MATCH(DMI_PRODUCT_NAME, "32597CG"),
326 },
327 },
328 {},
329};
330
331static int acpi_ac_add(struct acpi_device *device)
332{
333 struct power_supply_config psy_cfg = {};
334 int result = 0;
335 struct acpi_ac *ac = NULL;
336
337
338 if (!device)
339 return -EINVAL;
340
341 ac = kzalloc(sizeof(struct acpi_ac), GFP_KERNEL);
342 if (!ac)
343 return -ENOMEM;
344
345 ac->device = device;
346 strcpy(acpi_device_name(device), ACPI_AC_DEVICE_NAME);
347 strcpy(acpi_device_class(device), ACPI_AC_CLASS);
348 device->driver_data = ac;
349
350 result = acpi_ac_get_state(ac);
351 if (result)
352 goto end;
353
354 psy_cfg.drv_data = ac;
355
356 ac->charger_desc.name = acpi_device_bid(device);
357#ifdef CONFIG_ACPI_PROCFS_POWER
358 result = acpi_ac_add_fs(ac);
359 if (result)
360 goto end;
361#endif
362 ac->charger_desc.type = POWER_SUPPLY_TYPE_MAINS;
363 ac->charger_desc.properties = ac_props;
364 ac->charger_desc.num_properties = ARRAY_SIZE(ac_props);
365 ac->charger_desc.get_property = get_ac_property;
366 ac->charger = power_supply_register(&ac->device->dev,
367 &ac->charger_desc, &psy_cfg);
368 if (IS_ERR(ac->charger)) {
369 result = PTR_ERR(ac->charger);
370 goto end;
371 }
372
373 printk(KERN_INFO PREFIX "%s [%s] (%s)\n",
374 acpi_device_name(device), acpi_device_bid(device),
375 ac->state ? "on-line" : "off-line");
376
377 ac->battery_nb.notifier_call = acpi_ac_battery_notify;
378 register_acpi_notifier(&ac->battery_nb);
379end:
380 if (result) {
381#ifdef CONFIG_ACPI_PROCFS_POWER
382 acpi_ac_remove_fs(ac);
383#endif
384 kfree(ac);
385 }
386
387 dmi_check_system(ac_dmi_table);
388 return result;
389}
390
391#ifdef CONFIG_PM_SLEEP
392static int acpi_ac_resume(struct device *dev)
393{
394 struct acpi_ac *ac;
395 unsigned old_state;
396
397 if (!dev)
398 return -EINVAL;
399
400 ac = acpi_driver_data(to_acpi_device(dev));
401 if (!ac)
402 return -EINVAL;
403
404 old_state = ac->state;
405 if (acpi_ac_get_state(ac))
406 return 0;
407 if (old_state != ac->state)
408 kobject_uevent(&ac->charger->dev.kobj, KOBJ_CHANGE);
409 return 0;
410}
411#else
412#define acpi_ac_resume NULL
413#endif
414
415static int acpi_ac_remove(struct acpi_device *device)
416{
417 struct acpi_ac *ac = NULL;
418
419
420 if (!device || !acpi_driver_data(device))
421 return -EINVAL;
422
423 ac = acpi_driver_data(device);
424
425 power_supply_unregister(ac->charger);
426 unregister_acpi_notifier(&ac->battery_nb);
427
428#ifdef CONFIG_ACPI_PROCFS_POWER
429 acpi_ac_remove_fs(ac);
430#endif
431
432 kfree(ac);
433
434 return 0;
435}
436
437static int __init acpi_ac_init(void)
438{
439 unsigned int i;
440 int result;
441
442 if (acpi_disabled)
443 return -ENODEV;
444
445 for (i = 0; i < ARRAY_SIZE(acpi_ac_blacklist); i++)
446 if (acpi_dev_present(acpi_ac_blacklist[i].hid, "1",
447 acpi_ac_blacklist[i].hrv)) {
448 pr_info(PREFIX "AC: found native %s PMIC, not loading\n",
449 acpi_ac_blacklist[i].hid);
450 return -ENODEV;
451 }
452
453#ifdef CONFIG_ACPI_PROCFS_POWER
454 acpi_ac_dir = acpi_lock_ac_dir();
455 if (!acpi_ac_dir)
456 return -ENODEV;
457#endif
458
459
460 result = acpi_bus_register_driver(&acpi_ac_driver);
461 if (result < 0) {
462#ifdef CONFIG_ACPI_PROCFS_POWER
463 acpi_unlock_ac_dir(acpi_ac_dir);
464#endif
465 return -ENODEV;
466 }
467
468 return 0;
469}
470
471static void __exit acpi_ac_exit(void)
472{
473 acpi_bus_unregister_driver(&acpi_ac_driver);
474#ifdef CONFIG_ACPI_PROCFS_POWER
475 acpi_unlock_ac_dir(acpi_ac_dir);
476#endif
477}
478module_init(acpi_ac_init);
479module_exit(acpi_ac_exit);
480
