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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 | ||
0ab5bb64 LT |
55 | static int ac_sleep_before_get_state_ms; |
56 | ||
1da177e4 | 57 | struct acpi_ac { |
d5b4a3d0 | 58 | struct power_supply charger; |
cc8ef527 | 59 | struct platform_device *pdev; |
27663c58 | 60 | unsigned long long state; |
4eee4f03 | 61 | struct notifier_block battery_nb; |
1da177e4 LT |
62 | }; |
63 | ||
497888cf | 64 | #define to_acpi_ac(x) container_of(x, struct acpi_ac, charger) |
d5b4a3d0 | 65 | |
1da177e4 LT |
66 | /* -------------------------------------------------------------------------- |
67 | AC Adapter Management | |
68 | -------------------------------------------------------------------------- */ | |
69 | ||
4be44fcd | 70 | static int acpi_ac_get_state(struct acpi_ac *ac) |
1da177e4 | 71 | { |
cc8ef527 | 72 | acpi_status status; |
86b0cc12 | 73 | acpi_handle handle = ACPI_HANDLE(&ac->pdev->dev); |
1da177e4 | 74 | |
86b0cc12 | 75 | status = acpi_evaluate_integer(handle, "_PSR", NULL, |
cc8ef527 | 76 | &ac->state); |
1da177e4 | 77 | if (ACPI_FAILURE(status)) { |
cc8ef527 ZR |
78 | ACPI_EXCEPTION((AE_INFO, status, |
79 | "Error reading AC Adapter state")); | |
1da177e4 | 80 | ac->state = ACPI_AC_STATUS_UNKNOWN; |
d550d98d | 81 | return -ENODEV; |
1da177e4 | 82 | } |
4be44fcd | 83 | |
d550d98d | 84 | return 0; |
1da177e4 LT |
85 | } |
86 | ||
3151dbb0 ZR |
87 | /* -------------------------------------------------------------------------- |
88 | sysfs I/F | |
89 | -------------------------------------------------------------------------- */ | |
90 | static int get_ac_property(struct power_supply *psy, | |
91 | enum power_supply_property psp, | |
92 | union power_supply_propval *val) | |
93 | { | |
94 | struct acpi_ac *ac = to_acpi_ac(psy); | |
95 | ||
96 | if (!ac) | |
97 | return -ENODEV; | |
98 | ||
99 | if (acpi_ac_get_state(ac)) | |
100 | return -ENODEV; | |
101 | ||
102 | switch (psp) { | |
103 | case POWER_SUPPLY_PROP_ONLINE: | |
104 | val->intval = ac->state; | |
105 | break; | |
106 | default: | |
107 | return -EINVAL; | |
108 | } | |
109 | return 0; | |
110 | } | |
111 | ||
112 | static enum power_supply_property ac_props[] = { | |
113 | POWER_SUPPLY_PROP_ONLINE, | |
114 | }; | |
115 | ||
1da177e4 LT |
116 | /* -------------------------------------------------------------------------- |
117 | Driver Model | |
118 | -------------------------------------------------------------------------- */ | |
119 | ||
cc8ef527 | 120 | static void acpi_ac_notify_handler(acpi_handle handle, u32 event, void *data) |
1da177e4 | 121 | { |
cc8ef527 | 122 | struct acpi_ac *ac = data; |
86b0cc12 | 123 | struct acpi_device *adev; |
1da177e4 LT |
124 | |
125 | if (!ac) | |
d550d98d | 126 | return; |
1da177e4 | 127 | |
1da177e4 | 128 | switch (event) { |
f163ff51 LB |
129 | default: |
130 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, | |
131 | "Unsupported event [0x%x]\n", event)); | |
1da177e4 | 132 | case ACPI_AC_NOTIFY_STATUS: |
03d78252 CL |
133 | case ACPI_NOTIFY_BUS_CHECK: |
134 | case ACPI_NOTIFY_DEVICE_CHECK: | |
0ab5bb64 LT |
135 | /* |
136 | * A buggy BIOS may notify AC first and then sleep for | |
137 | * a specific time before doing actual operations in the | |
138 | * EC event handler (_Qxx). This will cause the AC state | |
139 | * reported by the ACPI event to be incorrect, so wait for a | |
140 | * specific time for the EC event handler to make progress. | |
141 | */ | |
142 | if (ac_sleep_before_get_state_ms > 0) | |
143 | msleep(ac_sleep_before_get_state_ms); | |
144 | ||
1da177e4 | 145 | acpi_ac_get_state(ac); |
86b0cc12 LT |
146 | adev = ACPI_COMPANION(&ac->pdev->dev); |
147 | acpi_bus_generate_netlink_event(adev->pnp.device_class, | |
cc8ef527 ZR |
148 | dev_name(&ac->pdev->dev), |
149 | event, (u32) ac->state); | |
86b0cc12 | 150 | acpi_notifier_call_chain(adev, event, (u32) ac->state); |
d5b4a3d0 | 151 | kobject_uevent(&ac->charger.dev->kobj, KOBJ_CHANGE); |
1da177e4 LT |
152 | } |
153 | ||
d550d98d | 154 | return; |
1da177e4 LT |
155 | } |
156 | ||
4eee4f03 AM |
157 | static int acpi_ac_battery_notify(struct notifier_block *nb, |
158 | unsigned long action, void *data) | |
159 | { | |
160 | struct acpi_ac *ac = container_of(nb, struct acpi_ac, battery_nb); | |
161 | struct acpi_bus_event *event = (struct acpi_bus_event *)data; | |
162 | ||
163 | /* | |
164 | * On HP Pavilion dv6-6179er AC status notifications aren't triggered | |
165 | * when adapter is plugged/unplugged. However, battery status | |
166 | * notifcations are triggered when battery starts charging or | |
167 | * discharging. Re-reading AC status triggers lost AC notifications, | |
168 | * if AC status has changed. | |
169 | */ | |
170 | if (strcmp(event->device_class, ACPI_BATTERY_CLASS) == 0 && | |
171 | event->type == ACPI_BATTERY_NOTIFY_STATUS) | |
172 | acpi_ac_get_state(ac); | |
173 | ||
174 | return NOTIFY_OK; | |
175 | } | |
176 | ||
0ab5bb64 LT |
177 | static int thinkpad_e530_quirk(const struct dmi_system_id *d) |
178 | { | |
179 | ac_sleep_before_get_state_ms = 1000; | |
180 | return 0; | |
181 | } | |
182 | ||
183 | static struct dmi_system_id ac_dmi_table[] = { | |
184 | { | |
185 | .callback = thinkpad_e530_quirk, | |
186 | .ident = "thinkpad e530", | |
187 | .matches = { | |
188 | DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"), | |
189 | DMI_MATCH(DMI_PRODUCT_NAME, "32597CG"), | |
190 | }, | |
191 | }, | |
192 | {}, | |
193 | }; | |
194 | ||
cc8ef527 | 195 | static int acpi_ac_probe(struct platform_device *pdev) |
1da177e4 | 196 | { |
4be44fcd | 197 | int result = 0; |
4be44fcd | 198 | struct acpi_ac *ac = NULL; |
cc8ef527 | 199 | struct acpi_device *adev; |
1da177e4 | 200 | |
cc8ef527 | 201 | if (!pdev) |
d550d98d | 202 | return -EINVAL; |
1da177e4 | 203 | |
86b0cc12 LT |
204 | adev = ACPI_COMPANION(&pdev->dev); |
205 | if (!adev) | |
cc8ef527 ZR |
206 | return -ENODEV; |
207 | ||
36bcbec7 | 208 | ac = kzalloc(sizeof(struct acpi_ac), GFP_KERNEL); |
1da177e4 | 209 | if (!ac) |
d550d98d | 210 | return -ENOMEM; |
1da177e4 | 211 | |
cc8ef527 ZR |
212 | strcpy(acpi_device_name(adev), ACPI_AC_DEVICE_NAME); |
213 | strcpy(acpi_device_class(adev), ACPI_AC_CLASS); | |
cc8ef527 ZR |
214 | ac->pdev = pdev; |
215 | platform_set_drvdata(pdev, ac); | |
1da177e4 LT |
216 | |
217 | result = acpi_ac_get_state(ac); | |
218 | if (result) | |
219 | goto end; | |
220 | ||
cc8ef527 | 221 | ac->charger.name = acpi_device_bid(adev); |
d5b4a3d0 AS |
222 | ac->charger.type = POWER_SUPPLY_TYPE_MAINS; |
223 | ac->charger.properties = ac_props; | |
224 | ac->charger.num_properties = ARRAY_SIZE(ac_props); | |
225 | ac->charger.get_property = get_ac_property; | |
cc8ef527 | 226 | result = power_supply_register(&pdev->dev, &ac->charger); |
f197ac13 LT |
227 | if (result) |
228 | goto end; | |
1da177e4 | 229 | |
cc8ef527 | 230 | result = acpi_install_notify_handler(ACPI_HANDLE(&pdev->dev), |
50a2bc54 | 231 | ACPI_ALL_NOTIFY, acpi_ac_notify_handler, ac); |
cc8ef527 ZR |
232 | if (result) { |
233 | power_supply_unregister(&ac->charger); | |
234 | goto end; | |
235 | } | |
4be44fcd | 236 | printk(KERN_INFO PREFIX "%s [%s] (%s)\n", |
cc8ef527 | 237 | acpi_device_name(adev), acpi_device_bid(adev), |
4be44fcd | 238 | ac->state ? "on-line" : "off-line"); |
1da177e4 | 239 | |
4eee4f03 AM |
240 | ac->battery_nb.notifier_call = acpi_ac_battery_notify; |
241 | register_acpi_notifier(&ac->battery_nb); | |
ab0fd674 LT |
242 | end: |
243 | if (result) | |
1da177e4 | 244 | kfree(ac); |
1da177e4 | 245 | |
0ab5bb64 | 246 | dmi_check_system(ac_dmi_table); |
d550d98d | 247 | return result; |
1da177e4 LT |
248 | } |
249 | ||
90692404 | 250 | #ifdef CONFIG_PM_SLEEP |
ccda7069 | 251 | static int acpi_ac_resume(struct device *dev) |
5bfeca31 AS |
252 | { |
253 | struct acpi_ac *ac; | |
254 | unsigned old_state; | |
ccda7069 RW |
255 | |
256 | if (!dev) | |
257 | return -EINVAL; | |
258 | ||
cc8ef527 | 259 | ac = platform_get_drvdata(to_platform_device(dev)); |
ccda7069 | 260 | if (!ac) |
5bfeca31 | 261 | return -EINVAL; |
ccda7069 | 262 | |
5bfeca31 AS |
263 | old_state = ac->state; |
264 | if (acpi_ac_get_state(ac)) | |
265 | return 0; | |
266 | if (old_state != ac->state) | |
267 | kobject_uevent(&ac->charger.dev->kobj, KOBJ_CHANGE); | |
268 | return 0; | |
269 | } | |
06521c2e SK |
270 | #else |
271 | #define acpi_ac_resume NULL | |
90692404 | 272 | #endif |
cc8ef527 | 273 | static SIMPLE_DEV_PM_OPS(acpi_ac_pm_ops, NULL, acpi_ac_resume); |
5bfeca31 | 274 | |
cc8ef527 | 275 | static int acpi_ac_remove(struct platform_device *pdev) |
1da177e4 | 276 | { |
cc8ef527 | 277 | struct acpi_ac *ac; |
1da177e4 | 278 | |
cc8ef527 | 279 | if (!pdev) |
d550d98d | 280 | return -EINVAL; |
1da177e4 | 281 | |
cc8ef527 | 282 | acpi_remove_notify_handler(ACPI_HANDLE(&pdev->dev), |
50a2bc54 | 283 | ACPI_ALL_NOTIFY, acpi_ac_notify_handler); |
1da177e4 | 284 | |
cc8ef527 | 285 | ac = platform_get_drvdata(pdev); |
d5b4a3d0 AS |
286 | if (ac->charger.dev) |
287 | power_supply_unregister(&ac->charger); | |
4eee4f03 | 288 | unregister_acpi_notifier(&ac->battery_nb); |
cc8ef527 | 289 | |
1da177e4 LT |
290 | kfree(ac); |
291 | ||
d550d98d | 292 | return 0; |
1da177e4 LT |
293 | } |
294 | ||
cc8ef527 ZR |
295 | static const struct acpi_device_id acpi_ac_match[] = { |
296 | { "ACPI0003", 0 }, | |
297 | { } | |
298 | }; | |
299 | MODULE_DEVICE_TABLE(acpi, acpi_ac_match); | |
300 | ||
301 | static struct platform_driver acpi_ac_driver = { | |
302 | .probe = acpi_ac_probe, | |
303 | .remove = acpi_ac_remove, | |
304 | .driver = { | |
305 | .name = "acpi-ac", | |
306 | .owner = THIS_MODULE, | |
307 | .pm = &acpi_ac_pm_ops, | |
308 | .acpi_match_table = ACPI_PTR(acpi_ac_match), | |
309 | }, | |
310 | }; | |
311 | ||
4be44fcd | 312 | static int __init acpi_ac_init(void) |
1da177e4 | 313 | { |
3f86b832 | 314 | int result; |
1da177e4 | 315 | |
4d8316d5 PM |
316 | if (acpi_disabled) |
317 | return -ENODEV; | |
1da177e4 | 318 | |
cc8ef527 | 319 | result = platform_driver_register(&acpi_ac_driver); |
ab0fd674 | 320 | if (result < 0) |
d550d98d | 321 | return -ENODEV; |
1da177e4 | 322 | |
d550d98d | 323 | return 0; |
1da177e4 LT |
324 | } |
325 | ||
4be44fcd | 326 | static void __exit acpi_ac_exit(void) |
1da177e4 | 327 | { |
cc8ef527 | 328 | platform_driver_unregister(&acpi_ac_driver); |
1da177e4 | 329 | } |
1da177e4 LT |
330 | module_init(acpi_ac_init); |
331 | module_exit(acpi_ac_exit); |