Commit | Line | Data |
---|---|---|
1da177e4 LT |
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> | |
5a0e3ad6 | 28 | #include <linux/slab.h> |
1da177e4 LT |
29 | #include <linux/init.h> |
30 | #include <linux/types.h> | |
0ab5bb64 LT |
31 | #include <linux/dmi.h> |
32 | #include <linux/delay.h> | |
cc8ef527 | 33 | #include <linux/platform_device.h> |
d5b4a3d0 | 34 | #include <linux/power_supply.h> |
8b48463f | 35 | #include <linux/acpi.h> |
4eee4f03 | 36 | #include "battery.h" |
1da177e4 | 37 | |
a192a958 LB |
38 | #define PREFIX "ACPI: " |
39 | ||
1da177e4 | 40 | #define ACPI_AC_CLASS "ac_adapter" |
1da177e4 LT |
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 | |
f52fd66d | 49 | ACPI_MODULE_NAME("ac"); |
1da177e4 | 50 | |
f52fd66d | 51 | MODULE_AUTHOR("Paul Diefenbaugh"); |
7cda93e0 | 52 | MODULE_DESCRIPTION("ACPI AC Adapter Driver"); |
1da177e4 LT |
53 | MODULE_LICENSE("GPL"); |
54 | ||
98012849 GR |
55 | static int acpi_ac_add(struct acpi_device *device); |
56 | static int acpi_ac_remove(struct acpi_device *device); | |
57 | static void acpi_ac_notify(struct acpi_device *device, u32 event); | |
58 | ||
59 | static const struct acpi_device_id ac_device_ids[] = { | |
60 | {"ACPI0003", 0}, | |
61 | {"", 0}, | |
62 | }; | |
63 | MODULE_DEVICE_TABLE(acpi, ac_device_ids); | |
64 | ||
65 | #ifdef CONFIG_PM_SLEEP | |
66 | static int acpi_ac_resume(struct device *dev); | |
67 | #endif | |
68 | static SIMPLE_DEV_PM_OPS(acpi_ac_pm, NULL, acpi_ac_resume); | |
69 | ||
0ab5bb64 LT |
70 | static int ac_sleep_before_get_state_ms; |
71 | ||
98012849 GR |
72 | static struct acpi_driver acpi_ac_driver = { |
73 | .name = "ac", | |
74 | .class = ACPI_AC_CLASS, | |
75 | .ids = ac_device_ids, | |
76 | .flags = ACPI_DRIVER_ALL_NOTIFY_EVENTS, | |
77 | .ops = { | |
78 | .add = acpi_ac_add, | |
79 | .remove = acpi_ac_remove, | |
80 | .notify = acpi_ac_notify, | |
81 | }, | |
82 | .drv.pm = &acpi_ac_pm, | |
83 | }; | |
84 | ||
1da177e4 | 85 | struct acpi_ac { |
d5b4a3d0 | 86 | struct power_supply charger; |
98012849 | 87 | struct acpi_device * device; |
27663c58 | 88 | unsigned long long state; |
4eee4f03 | 89 | struct notifier_block battery_nb; |
1da177e4 LT |
90 | }; |
91 | ||
497888cf | 92 | #define to_acpi_ac(x) container_of(x, struct acpi_ac, charger) |
d5b4a3d0 | 93 | |
1da177e4 LT |
94 | /* -------------------------------------------------------------------------- |
95 | AC Adapter Management | |
96 | -------------------------------------------------------------------------- */ | |
97 | ||
4be44fcd | 98 | static int acpi_ac_get_state(struct acpi_ac *ac) |
1da177e4 | 99 | { |
98012849 GR |
100 | acpi_status status = AE_OK; |
101 | ||
102 | if (!ac) | |
103 | return -EINVAL; | |
1da177e4 | 104 | |
98012849 | 105 | status = acpi_evaluate_integer(ac->device->handle, "_PSR", NULL, |
cc8ef527 | 106 | &ac->state); |
1da177e4 | 107 | if (ACPI_FAILURE(status)) { |
cc8ef527 ZR |
108 | ACPI_EXCEPTION((AE_INFO, status, |
109 | "Error reading AC Adapter state")); | |
1da177e4 | 110 | ac->state = ACPI_AC_STATUS_UNKNOWN; |
d550d98d | 111 | return -ENODEV; |
1da177e4 | 112 | } |
4be44fcd | 113 | |
d550d98d | 114 | return 0; |
1da177e4 LT |
115 | } |
116 | ||
3151dbb0 ZR |
117 | /* -------------------------------------------------------------------------- |
118 | sysfs I/F | |
119 | -------------------------------------------------------------------------- */ | |
120 | static int get_ac_property(struct power_supply *psy, | |
121 | enum power_supply_property psp, | |
122 | union power_supply_propval *val) | |
123 | { | |
124 | struct acpi_ac *ac = to_acpi_ac(psy); | |
125 | ||
126 | if (!ac) | |
127 | return -ENODEV; | |
128 | ||
129 | if (acpi_ac_get_state(ac)) | |
130 | return -ENODEV; | |
131 | ||
132 | switch (psp) { | |
133 | case POWER_SUPPLY_PROP_ONLINE: | |
134 | val->intval = ac->state; | |
135 | break; | |
136 | default: | |
137 | return -EINVAL; | |
138 | } | |
139 | return 0; | |
140 | } | |
141 | ||
142 | static enum power_supply_property ac_props[] = { | |
143 | POWER_SUPPLY_PROP_ONLINE, | |
144 | }; | |
145 | ||
1da177e4 LT |
146 | /* -------------------------------------------------------------------------- |
147 | Driver Model | |
148 | -------------------------------------------------------------------------- */ | |
149 | ||
98012849 | 150 | static void acpi_ac_notify(struct acpi_device *device, u32 event) |
1da177e4 | 151 | { |
98012849 | 152 | struct acpi_ac *ac = acpi_driver_data(device); |
1da177e4 LT |
153 | |
154 | if (!ac) | |
d550d98d | 155 | return; |
1da177e4 | 156 | |
1da177e4 | 157 | switch (event) { |
f163ff51 LB |
158 | default: |
159 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, | |
160 | "Unsupported event [0x%x]\n", event)); | |
1da177e4 | 161 | case ACPI_AC_NOTIFY_STATUS: |
03d78252 CL |
162 | case ACPI_NOTIFY_BUS_CHECK: |
163 | case ACPI_NOTIFY_DEVICE_CHECK: | |
0ab5bb64 LT |
164 | /* |
165 | * A buggy BIOS may notify AC first and then sleep for | |
166 | * a specific time before doing actual operations in the | |
167 | * EC event handler (_Qxx). This will cause the AC state | |
168 | * reported by the ACPI event to be incorrect, so wait for a | |
169 | * specific time for the EC event handler to make progress. | |
170 | */ | |
171 | if (ac_sleep_before_get_state_ms > 0) | |
172 | msleep(ac_sleep_before_get_state_ms); | |
173 | ||
1da177e4 | 174 | acpi_ac_get_state(ac); |
98012849 GR |
175 | acpi_bus_generate_netlink_event(device->pnp.device_class, |
176 | dev_name(&device->dev), event, | |
177 | (u32) ac->state); | |
178 | acpi_notifier_call_chain(device, event, (u32) ac->state); | |
d5b4a3d0 | 179 | kobject_uevent(&ac->charger.dev->kobj, KOBJ_CHANGE); |
1da177e4 LT |
180 | } |
181 | ||
d550d98d | 182 | return; |
1da177e4 LT |
183 | } |
184 | ||
4eee4f03 AM |
185 | static int acpi_ac_battery_notify(struct notifier_block *nb, |
186 | unsigned long action, void *data) | |
187 | { | |
188 | struct acpi_ac *ac = container_of(nb, struct acpi_ac, battery_nb); | |
189 | struct acpi_bus_event *event = (struct acpi_bus_event *)data; | |
190 | ||
191 | /* | |
192 | * On HP Pavilion dv6-6179er AC status notifications aren't triggered | |
193 | * when adapter is plugged/unplugged. However, battery status | |
194 | * notifcations are triggered when battery starts charging or | |
195 | * discharging. Re-reading AC status triggers lost AC notifications, | |
196 | * if AC status has changed. | |
197 | */ | |
198 | if (strcmp(event->device_class, ACPI_BATTERY_CLASS) == 0 && | |
199 | event->type == ACPI_BATTERY_NOTIFY_STATUS) | |
200 | acpi_ac_get_state(ac); | |
201 | ||
202 | return NOTIFY_OK; | |
203 | } | |
204 | ||
0ab5bb64 LT |
205 | static int thinkpad_e530_quirk(const struct dmi_system_id *d) |
206 | { | |
207 | ac_sleep_before_get_state_ms = 1000; | |
208 | return 0; | |
209 | } | |
210 | ||
211 | static struct dmi_system_id ac_dmi_table[] = { | |
212 | { | |
213 | .callback = thinkpad_e530_quirk, | |
214 | .ident = "thinkpad e530", | |
215 | .matches = { | |
216 | DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"), | |
217 | DMI_MATCH(DMI_PRODUCT_NAME, "32597CG"), | |
218 | }, | |
219 | }, | |
220 | {}, | |
221 | }; | |
222 | ||
98012849 | 223 | static int acpi_ac_add(struct acpi_device *device) |
1da177e4 | 224 | { |
4be44fcd | 225 | int result = 0; |
4be44fcd | 226 | struct acpi_ac *ac = NULL; |
1da177e4 | 227 | |
1da177e4 | 228 | |
98012849 GR |
229 | if (!device) |
230 | return -EINVAL; | |
cc8ef527 | 231 | |
36bcbec7 | 232 | ac = kzalloc(sizeof(struct acpi_ac), GFP_KERNEL); |
1da177e4 | 233 | if (!ac) |
d550d98d | 234 | return -ENOMEM; |
1da177e4 | 235 | |
98012849 GR |
236 | ac->device = device; |
237 | strcpy(acpi_device_name(device), ACPI_AC_DEVICE_NAME); | |
238 | strcpy(acpi_device_class(device), ACPI_AC_CLASS); | |
239 | device->driver_data = ac; | |
1da177e4 LT |
240 | |
241 | result = acpi_ac_get_state(ac); | |
242 | if (result) | |
243 | goto end; | |
244 | ||
98012849 | 245 | ac->charger.name = acpi_device_bid(device); |
d5b4a3d0 AS |
246 | ac->charger.type = POWER_SUPPLY_TYPE_MAINS; |
247 | ac->charger.properties = ac_props; | |
248 | ac->charger.num_properties = ARRAY_SIZE(ac_props); | |
249 | ac->charger.get_property = get_ac_property; | |
98012849 | 250 | result = power_supply_register(&ac->device->dev, &ac->charger); |
f197ac13 LT |
251 | if (result) |
252 | goto end; | |
1da177e4 | 253 | |
4be44fcd | 254 | printk(KERN_INFO PREFIX "%s [%s] (%s)\n", |
98012849 | 255 | acpi_device_name(device), acpi_device_bid(device), |
4be44fcd | 256 | ac->state ? "on-line" : "off-line"); |
1da177e4 | 257 | |
4eee4f03 AM |
258 | ac->battery_nb.notifier_call = acpi_ac_battery_notify; |
259 | register_acpi_notifier(&ac->battery_nb); | |
ab0fd674 LT |
260 | end: |
261 | if (result) | |
1da177e4 | 262 | kfree(ac); |
1da177e4 | 263 | |
0ab5bb64 | 264 | dmi_check_system(ac_dmi_table); |
d550d98d | 265 | return result; |
1da177e4 LT |
266 | } |
267 | ||
90692404 | 268 | #ifdef CONFIG_PM_SLEEP |
ccda7069 | 269 | static int acpi_ac_resume(struct device *dev) |
5bfeca31 AS |
270 | { |
271 | struct acpi_ac *ac; | |
272 | unsigned old_state; | |
ccda7069 RW |
273 | |
274 | if (!dev) | |
275 | return -EINVAL; | |
276 | ||
98012849 | 277 | ac = acpi_driver_data(to_acpi_device(dev)); |
ccda7069 | 278 | if (!ac) |
5bfeca31 | 279 | return -EINVAL; |
ccda7069 | 280 | |
5bfeca31 AS |
281 | old_state = ac->state; |
282 | if (acpi_ac_get_state(ac)) | |
283 | return 0; | |
284 | if (old_state != ac->state) | |
285 | kobject_uevent(&ac->charger.dev->kobj, KOBJ_CHANGE); | |
286 | return 0; | |
287 | } | |
06521c2e SK |
288 | #else |
289 | #define acpi_ac_resume NULL | |
90692404 | 290 | #endif |
5bfeca31 | 291 | |
98012849 | 292 | static int acpi_ac_remove(struct acpi_device *device) |
1da177e4 | 293 | { |
98012849 GR |
294 | struct acpi_ac *ac = NULL; |
295 | ||
1da177e4 | 296 | |
98012849 | 297 | if (!device || !acpi_driver_data(device)) |
d550d98d | 298 | return -EINVAL; |
1da177e4 | 299 | |
98012849 | 300 | ac = acpi_driver_data(device); |
1da177e4 | 301 | |
d5b4a3d0 AS |
302 | if (ac->charger.dev) |
303 | power_supply_unregister(&ac->charger); | |
4eee4f03 | 304 | unregister_acpi_notifier(&ac->battery_nb); |
cc8ef527 | 305 | |
1da177e4 LT |
306 | kfree(ac); |
307 | ||
d550d98d | 308 | return 0; |
1da177e4 LT |
309 | } |
310 | ||
4be44fcd | 311 | static int __init acpi_ac_init(void) |
1da177e4 | 312 | { |
3f86b832 | 313 | int result; |
1da177e4 | 314 | |
4d8316d5 PM |
315 | if (acpi_disabled) |
316 | return -ENODEV; | |
1da177e4 | 317 | |
98012849 | 318 | result = acpi_bus_register_driver(&acpi_ac_driver); |
ab0fd674 | 319 | if (result < 0) |
d550d98d | 320 | return -ENODEV; |
1da177e4 | 321 | |
d550d98d | 322 | return 0; |
1da177e4 LT |
323 | } |
324 | ||
4be44fcd | 325 | static void __exit acpi_ac_exit(void) |
1da177e4 | 326 | { |
98012849 | 327 | acpi_bus_unregister_driver(&acpi_ac_driver); |
1da177e4 | 328 | } |
1da177e4 LT |
329 | module_init(acpi_ac_init); |
330 | module_exit(acpi_ac_exit); |