Loading...
1/*
2 * acpi_ac.c - ACPI AC Adapter Driver ($Revision: 27 $)
3 *
4 * Copyright (C) 2001, 2002 Andy Grover <andrew.grover@intel.com>
5 * Copyright (C) 2001, 2002 Paul Diefenbaugh <paul.s.diefenbaugh@intel.com>
6 *
7 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
8 *
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License as published by
11 * the Free Software Foundation; either version 2 of the License, or (at
12 * your option) any later version.
13 *
14 * This program is distributed in the hope that it will be useful, but
15 * WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
17 * General Public License for more details.
18 *
19 * You should have received a copy of the GNU General Public License along
20 * with this program; if not, write to the Free Software Foundation, Inc.,
21 * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
22 *
23 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
24 */
25
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#ifdef CONFIG_ACPI_PROCFS_POWER
32#include <linux/proc_fs.h>
33#include <linux/seq_file.h>
34#endif
35#include <linux/power_supply.h>
36#include <acpi/acpi_bus.h>
37#include <acpi/acpi_drivers.h>
38
39#define PREFIX "ACPI: "
40
41#define ACPI_AC_CLASS "ac_adapter"
42#define ACPI_AC_DEVICE_NAME "AC Adapter"
43#define ACPI_AC_FILE_STATE "state"
44#define ACPI_AC_NOTIFY_STATUS 0x80
45#define ACPI_AC_STATUS_OFFLINE 0x00
46#define ACPI_AC_STATUS_ONLINE 0x01
47#define ACPI_AC_STATUS_UNKNOWN 0xFF
48
49#define _COMPONENT ACPI_AC_COMPONENT
50ACPI_MODULE_NAME("ac");
51
52MODULE_AUTHOR("Paul Diefenbaugh");
53MODULE_DESCRIPTION("ACPI AC Adapter Driver");
54MODULE_LICENSE("GPL");
55
56#ifdef CONFIG_ACPI_PROCFS_POWER
57extern struct proc_dir_entry *acpi_lock_ac_dir(void);
58extern void *acpi_unlock_ac_dir(struct proc_dir_entry *acpi_ac_dir);
59static int acpi_ac_open_fs(struct inode *inode, struct file *file);
60#endif
61
62static int acpi_ac_add(struct acpi_device *device);
63static int acpi_ac_remove(struct acpi_device *device, int type);
64static int acpi_ac_resume(struct acpi_device *device);
65static void acpi_ac_notify(struct acpi_device *device, u32 event);
66
67static const struct acpi_device_id ac_device_ids[] = {
68 {"ACPI0003", 0},
69 {"", 0},
70};
71MODULE_DEVICE_TABLE(acpi, ac_device_ids);
72
73static struct acpi_driver acpi_ac_driver = {
74 .name = "ac",
75 .class = ACPI_AC_CLASS,
76 .ids = ac_device_ids,
77 .flags = ACPI_DRIVER_ALL_NOTIFY_EVENTS,
78 .ops = {
79 .add = acpi_ac_add,
80 .remove = acpi_ac_remove,
81 .resume = acpi_ac_resume,
82 .notify = acpi_ac_notify,
83 },
84};
85
86struct acpi_ac {
87 struct power_supply charger;
88 struct acpi_device * device;
89 unsigned long long state;
90};
91
92#define to_acpi_ac(x) container_of(x, struct acpi_ac, charger)
93
94#ifdef CONFIG_ACPI_PROCFS_POWER
95static const struct file_operations acpi_ac_fops = {
96 .owner = THIS_MODULE,
97 .open = acpi_ac_open_fs,
98 .read = seq_read,
99 .llseek = seq_lseek,
100 .release = single_release,
101};
102#endif
103
104/* --------------------------------------------------------------------------
105 AC Adapter Management
106 -------------------------------------------------------------------------- */
107
108static int acpi_ac_get_state(struct acpi_ac *ac)
109{
110 acpi_status status = AE_OK;
111
112
113 if (!ac)
114 return -EINVAL;
115
116 status = acpi_evaluate_integer(ac->device->handle, "_PSR", NULL, &ac->state);
117 if (ACPI_FAILURE(status)) {
118 ACPI_EXCEPTION((AE_INFO, status, "Error reading AC Adapter state"));
119 ac->state = ACPI_AC_STATUS_UNKNOWN;
120 return -ENODEV;
121 }
122
123 return 0;
124}
125
126/* --------------------------------------------------------------------------
127 sysfs I/F
128 -------------------------------------------------------------------------- */
129static int get_ac_property(struct power_supply *psy,
130 enum power_supply_property psp,
131 union power_supply_propval *val)
132{
133 struct acpi_ac *ac = to_acpi_ac(psy);
134
135 if (!ac)
136 return -ENODEV;
137
138 if (acpi_ac_get_state(ac))
139 return -ENODEV;
140
141 switch (psp) {
142 case POWER_SUPPLY_PROP_ONLINE:
143 val->intval = ac->state;
144 break;
145 default:
146 return -EINVAL;
147 }
148 return 0;
149}
150
151static enum power_supply_property ac_props[] = {
152 POWER_SUPPLY_PROP_ONLINE,
153};
154
155#ifdef CONFIG_ACPI_PROCFS_POWER
156/* --------------------------------------------------------------------------
157 FS Interface (/proc)
158 -------------------------------------------------------------------------- */
159
160static struct proc_dir_entry *acpi_ac_dir;
161
162static int acpi_ac_seq_show(struct seq_file *seq, void *offset)
163{
164 struct acpi_ac *ac = seq->private;
165
166
167 if (!ac)
168 return 0;
169
170 if (acpi_ac_get_state(ac)) {
171 seq_puts(seq, "ERROR: Unable to read AC Adapter state\n");
172 return 0;
173 }
174
175 seq_puts(seq, "state: ");
176 switch (ac->state) {
177 case ACPI_AC_STATUS_OFFLINE:
178 seq_puts(seq, "off-line\n");
179 break;
180 case ACPI_AC_STATUS_ONLINE:
181 seq_puts(seq, "on-line\n");
182 break;
183 default:
184 seq_puts(seq, "unknown\n");
185 break;
186 }
187
188 return 0;
189}
190
191static int acpi_ac_open_fs(struct inode *inode, struct file *file)
192{
193 return single_open(file, acpi_ac_seq_show, PDE(inode)->data);
194}
195
196static int acpi_ac_add_fs(struct acpi_device *device)
197{
198 struct proc_dir_entry *entry = NULL;
199
200 printk(KERN_WARNING PREFIX "Deprecated procfs I/F for AC is loaded,"
201 " please retry with CONFIG_ACPI_PROCFS_POWER cleared\n");
202 if (!acpi_device_dir(device)) {
203 acpi_device_dir(device) = proc_mkdir(acpi_device_bid(device),
204 acpi_ac_dir);
205 if (!acpi_device_dir(device))
206 return -ENODEV;
207 }
208
209 /* 'state' [R] */
210 entry = proc_create_data(ACPI_AC_FILE_STATE,
211 S_IRUGO, acpi_device_dir(device),
212 &acpi_ac_fops, acpi_driver_data(device));
213 if (!entry)
214 return -ENODEV;
215 return 0;
216}
217
218static int acpi_ac_remove_fs(struct acpi_device *device)
219{
220
221 if (acpi_device_dir(device)) {
222 remove_proc_entry(ACPI_AC_FILE_STATE, acpi_device_dir(device));
223
224 remove_proc_entry(acpi_device_bid(device), acpi_ac_dir);
225 acpi_device_dir(device) = NULL;
226 }
227
228 return 0;
229}
230#endif
231
232/* --------------------------------------------------------------------------
233 Driver Model
234 -------------------------------------------------------------------------- */
235
236static void acpi_ac_notify(struct acpi_device *device, u32 event)
237{
238 struct acpi_ac *ac = acpi_driver_data(device);
239
240
241 if (!ac)
242 return;
243
244 switch (event) {
245 default:
246 ACPI_DEBUG_PRINT((ACPI_DB_INFO,
247 "Unsupported event [0x%x]\n", event));
248 case ACPI_AC_NOTIFY_STATUS:
249 case ACPI_NOTIFY_BUS_CHECK:
250 case ACPI_NOTIFY_DEVICE_CHECK:
251 acpi_ac_get_state(ac);
252 acpi_bus_generate_proc_event(device, event, (u32) ac->state);
253 acpi_bus_generate_netlink_event(device->pnp.device_class,
254 dev_name(&device->dev), event,
255 (u32) ac->state);
256 acpi_notifier_call_chain(device, event, (u32) ac->state);
257 kobject_uevent(&ac->charger.dev->kobj, KOBJ_CHANGE);
258 }
259
260 return;
261}
262
263static int acpi_ac_add(struct acpi_device *device)
264{
265 int result = 0;
266 struct acpi_ac *ac = NULL;
267
268
269 if (!device)
270 return -EINVAL;
271
272 ac = kzalloc(sizeof(struct acpi_ac), GFP_KERNEL);
273 if (!ac)
274 return -ENOMEM;
275
276 ac->device = device;
277 strcpy(acpi_device_name(device), ACPI_AC_DEVICE_NAME);
278 strcpy(acpi_device_class(device), ACPI_AC_CLASS);
279 device->driver_data = ac;
280
281 result = acpi_ac_get_state(ac);
282 if (result)
283 goto end;
284
285#ifdef CONFIG_ACPI_PROCFS_POWER
286 result = acpi_ac_add_fs(device);
287#endif
288 if (result)
289 goto end;
290 ac->charger.name = acpi_device_bid(device);
291 ac->charger.type = POWER_SUPPLY_TYPE_MAINS;
292 ac->charger.properties = ac_props;
293 ac->charger.num_properties = ARRAY_SIZE(ac_props);
294 ac->charger.get_property = get_ac_property;
295 power_supply_register(&ac->device->dev, &ac->charger);
296
297 printk(KERN_INFO PREFIX "%s [%s] (%s)\n",
298 acpi_device_name(device), acpi_device_bid(device),
299 ac->state ? "on-line" : "off-line");
300
301 end:
302 if (result) {
303#ifdef CONFIG_ACPI_PROCFS_POWER
304 acpi_ac_remove_fs(device);
305#endif
306 kfree(ac);
307 }
308
309 return result;
310}
311
312static int acpi_ac_resume(struct acpi_device *device)
313{
314 struct acpi_ac *ac;
315 unsigned old_state;
316 if (!device || !acpi_driver_data(device))
317 return -EINVAL;
318 ac = acpi_driver_data(device);
319 old_state = ac->state;
320 if (acpi_ac_get_state(ac))
321 return 0;
322 if (old_state != ac->state)
323 kobject_uevent(&ac->charger.dev->kobj, KOBJ_CHANGE);
324 return 0;
325}
326
327static int acpi_ac_remove(struct acpi_device *device, int type)
328{
329 struct acpi_ac *ac = NULL;
330
331
332 if (!device || !acpi_driver_data(device))
333 return -EINVAL;
334
335 ac = acpi_driver_data(device);
336
337 if (ac->charger.dev)
338 power_supply_unregister(&ac->charger);
339#ifdef CONFIG_ACPI_PROCFS_POWER
340 acpi_ac_remove_fs(device);
341#endif
342
343 kfree(ac);
344
345 return 0;
346}
347
348static int __init acpi_ac_init(void)
349{
350 int result;
351
352 if (acpi_disabled)
353 return -ENODEV;
354
355#ifdef CONFIG_ACPI_PROCFS_POWER
356 acpi_ac_dir = acpi_lock_ac_dir();
357 if (!acpi_ac_dir)
358 return -ENODEV;
359#endif
360
361 result = acpi_bus_register_driver(&acpi_ac_driver);
362 if (result < 0) {
363#ifdef CONFIG_ACPI_PROCFS_POWER
364 acpi_unlock_ac_dir(acpi_ac_dir);
365#endif
366 return -ENODEV;
367 }
368
369 return 0;
370}
371
372static void __exit acpi_ac_exit(void)
373{
374
375 acpi_bus_unregister_driver(&acpi_ac_driver);
376
377#ifdef CONFIG_ACPI_PROCFS_POWER
378 acpi_unlock_ac_dir(acpi_ac_dir);
379#endif
380
381 return;
382}
383
384module_init(acpi_ac_init);
385module_exit(acpi_ac_exit);
1/*
2 * acpi_ac.c - ACPI AC Adapter Driver ($Revision: 27 $)
3 *
4 * Copyright (C) 2001, 2002 Andy Grover <andrew.grover@intel.com>
5 * Copyright (C) 2001, 2002 Paul Diefenbaugh <paul.s.diefenbaugh@intel.com>
6 *
7 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
8 *
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License as published by
11 * the Free Software Foundation; either version 2 of the License, or (at
12 * your option) any later version.
13 *
14 * This program is distributed in the hope that it will be useful, but
15 * WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
17 * General Public License for more details.
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 <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/* Lists of PMIC ACPI HIDs with an (often better) native charger driver */
72static const struct acpi_ac_bl acpi_ac_blacklist[] = {
73 { "INT33F4", -1 }, /* X-Powers AXP288 PMIC */
74 { "INT34D3", 3 }, /* Intel Cherrytrail Whiskey Cove PMIC */
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 AC Adapter Management
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 sysfs I/F
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 FS Interface (/proc)
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 /* 'state' [R] */
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 Driver Model
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 /* fall through */
269 case ACPI_AC_NOTIFY_STATUS:
270 case ACPI_NOTIFY_BUS_CHECK:
271 case ACPI_NOTIFY_DEVICE_CHECK:
272 /*
273 * A buggy BIOS may notify AC first and then sleep for
274 * a specific time before doing actual operations in the
275 * EC event handler (_Qxx). This will cause the AC state
276 * reported by the ACPI event to be incorrect, so wait for a
277 * specific time for the EC event handler to make progress.
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 * On HP Pavilion dv6-6179er AC status notifications aren't triggered
301 * when adapter is plugged/unplugged. However, battery status
302 * notifcations are triggered when battery starts charging or
303 * discharging. Re-reading AC status triggers lost AC notifications,
304 * if AC status has changed.
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);