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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> |
1da177e4 LT |
35 | #include <acpi/acpi_bus.h> |
36 | #include <acpi/acpi_drivers.h> | |
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; |
1da177e4 LT |
61 | }; |
62 | ||
497888cf | 63 | #define to_acpi_ac(x) container_of(x, struct acpi_ac, charger) |
d5b4a3d0 | 64 | |
1da177e4 LT |
65 | /* -------------------------------------------------------------------------- |
66 | AC Adapter Management | |
67 | -------------------------------------------------------------------------- */ | |
68 | ||
4be44fcd | 69 | static int acpi_ac_get_state(struct acpi_ac *ac) |
1da177e4 | 70 | { |
cc8ef527 | 71 | acpi_status status; |
86b0cc12 | 72 | acpi_handle handle = ACPI_HANDLE(&ac->pdev->dev); |
1da177e4 | 73 | |
86b0cc12 | 74 | status = acpi_evaluate_integer(handle, "_PSR", NULL, |
cc8ef527 | 75 | &ac->state); |
1da177e4 | 76 | if (ACPI_FAILURE(status)) { |
cc8ef527 ZR |
77 | ACPI_EXCEPTION((AE_INFO, status, |
78 | "Error reading AC Adapter state")); | |
1da177e4 | 79 | ac->state = ACPI_AC_STATUS_UNKNOWN; |
d550d98d | 80 | return -ENODEV; |
1da177e4 | 81 | } |
4be44fcd | 82 | |
d550d98d | 83 | return 0; |
1da177e4 LT |
84 | } |
85 | ||
3151dbb0 ZR |
86 | /* -------------------------------------------------------------------------- |
87 | sysfs I/F | |
88 | -------------------------------------------------------------------------- */ | |
89 | static int get_ac_property(struct power_supply *psy, | |
90 | enum power_supply_property psp, | |
91 | union power_supply_propval *val) | |
92 | { | |
93 | struct acpi_ac *ac = to_acpi_ac(psy); | |
94 | ||
95 | if (!ac) | |
96 | return -ENODEV; | |
97 | ||
98 | if (acpi_ac_get_state(ac)) | |
99 | return -ENODEV; | |
100 | ||
101 | switch (psp) { | |
102 | case POWER_SUPPLY_PROP_ONLINE: | |
103 | val->intval = ac->state; | |
104 | break; | |
105 | default: | |
106 | return -EINVAL; | |
107 | } | |
108 | return 0; | |
109 | } | |
110 | ||
111 | static enum power_supply_property ac_props[] = { | |
112 | POWER_SUPPLY_PROP_ONLINE, | |
113 | }; | |
114 | ||
1da177e4 LT |
115 | /* -------------------------------------------------------------------------- |
116 | Driver Model | |
117 | -------------------------------------------------------------------------- */ | |
118 | ||
cc8ef527 | 119 | static void acpi_ac_notify_handler(acpi_handle handle, u32 event, void *data) |
1da177e4 | 120 | { |
cc8ef527 | 121 | struct acpi_ac *ac = data; |
86b0cc12 | 122 | struct acpi_device *adev; |
1da177e4 LT |
123 | |
124 | if (!ac) | |
d550d98d | 125 | return; |
1da177e4 | 126 | |
1da177e4 | 127 | switch (event) { |
f163ff51 LB |
128 | default: |
129 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, | |
130 | "Unsupported event [0x%x]\n", event)); | |
1da177e4 | 131 | case ACPI_AC_NOTIFY_STATUS: |
03d78252 CL |
132 | case ACPI_NOTIFY_BUS_CHECK: |
133 | case ACPI_NOTIFY_DEVICE_CHECK: | |
0ab5bb64 LT |
134 | /* |
135 | * A buggy BIOS may notify AC first and then sleep for | |
136 | * a specific time before doing actual operations in the | |
137 | * EC event handler (_Qxx). This will cause the AC state | |
138 | * reported by the ACPI event to be incorrect, so wait for a | |
139 | * specific time for the EC event handler to make progress. | |
140 | */ | |
141 | if (ac_sleep_before_get_state_ms > 0) | |
142 | msleep(ac_sleep_before_get_state_ms); | |
143 | ||
1da177e4 | 144 | acpi_ac_get_state(ac); |
86b0cc12 LT |
145 | adev = ACPI_COMPANION(&ac->pdev->dev); |
146 | acpi_bus_generate_netlink_event(adev->pnp.device_class, | |
cc8ef527 ZR |
147 | dev_name(&ac->pdev->dev), |
148 | event, (u32) ac->state); | |
86b0cc12 | 149 | acpi_notifier_call_chain(adev, event, (u32) ac->state); |
d5b4a3d0 | 150 | kobject_uevent(&ac->charger.dev->kobj, KOBJ_CHANGE); |
1da177e4 LT |
151 | } |
152 | ||
d550d98d | 153 | return; |
1da177e4 LT |
154 | } |
155 | ||
0ab5bb64 LT |
156 | static int thinkpad_e530_quirk(const struct dmi_system_id *d) |
157 | { | |
158 | ac_sleep_before_get_state_ms = 1000; | |
159 | return 0; | |
160 | } | |
161 | ||
162 | static struct dmi_system_id ac_dmi_table[] = { | |
163 | { | |
164 | .callback = thinkpad_e530_quirk, | |
165 | .ident = "thinkpad e530", | |
166 | .matches = { | |
167 | DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"), | |
168 | DMI_MATCH(DMI_PRODUCT_NAME, "32597CG"), | |
169 | }, | |
170 | }, | |
171 | {}, | |
172 | }; | |
173 | ||
cc8ef527 | 174 | static int acpi_ac_probe(struct platform_device *pdev) |
1da177e4 | 175 | { |
4be44fcd | 176 | int result = 0; |
4be44fcd | 177 | struct acpi_ac *ac = NULL; |
cc8ef527 | 178 | struct acpi_device *adev; |
1da177e4 | 179 | |
cc8ef527 | 180 | if (!pdev) |
d550d98d | 181 | return -EINVAL; |
1da177e4 | 182 | |
86b0cc12 LT |
183 | adev = ACPI_COMPANION(&pdev->dev); |
184 | if (!adev) | |
cc8ef527 ZR |
185 | return -ENODEV; |
186 | ||
36bcbec7 | 187 | ac = kzalloc(sizeof(struct acpi_ac), GFP_KERNEL); |
1da177e4 | 188 | if (!ac) |
d550d98d | 189 | return -ENOMEM; |
1da177e4 | 190 | |
cc8ef527 ZR |
191 | strcpy(acpi_device_name(adev), ACPI_AC_DEVICE_NAME); |
192 | strcpy(acpi_device_class(adev), ACPI_AC_CLASS); | |
cc8ef527 ZR |
193 | ac->pdev = pdev; |
194 | platform_set_drvdata(pdev, ac); | |
1da177e4 LT |
195 | |
196 | result = acpi_ac_get_state(ac); | |
197 | if (result) | |
198 | goto end; | |
199 | ||
cc8ef527 | 200 | ac->charger.name = acpi_device_bid(adev); |
d5b4a3d0 AS |
201 | ac->charger.type = POWER_SUPPLY_TYPE_MAINS; |
202 | ac->charger.properties = ac_props; | |
203 | ac->charger.num_properties = ARRAY_SIZE(ac_props); | |
204 | ac->charger.get_property = get_ac_property; | |
cc8ef527 | 205 | result = power_supply_register(&pdev->dev, &ac->charger); |
f197ac13 LT |
206 | if (result) |
207 | goto end; | |
1da177e4 | 208 | |
cc8ef527 ZR |
209 | result = acpi_install_notify_handler(ACPI_HANDLE(&pdev->dev), |
210 | ACPI_DEVICE_NOTIFY, acpi_ac_notify_handler, ac); | |
211 | if (result) { | |
212 | power_supply_unregister(&ac->charger); | |
213 | goto end; | |
214 | } | |
4be44fcd | 215 | printk(KERN_INFO PREFIX "%s [%s] (%s)\n", |
cc8ef527 | 216 | acpi_device_name(adev), acpi_device_bid(adev), |
4be44fcd | 217 | ac->state ? "on-line" : "off-line"); |
1da177e4 | 218 | |
ab0fd674 LT |
219 | end: |
220 | if (result) | |
1da177e4 | 221 | kfree(ac); |
1da177e4 | 222 | |
0ab5bb64 | 223 | dmi_check_system(ac_dmi_table); |
d550d98d | 224 | return result; |
1da177e4 LT |
225 | } |
226 | ||
90692404 | 227 | #ifdef CONFIG_PM_SLEEP |
ccda7069 | 228 | static int acpi_ac_resume(struct device *dev) |
5bfeca31 AS |
229 | { |
230 | struct acpi_ac *ac; | |
231 | unsigned old_state; | |
ccda7069 RW |
232 | |
233 | if (!dev) | |
234 | return -EINVAL; | |
235 | ||
cc8ef527 | 236 | ac = platform_get_drvdata(to_platform_device(dev)); |
ccda7069 | 237 | if (!ac) |
5bfeca31 | 238 | return -EINVAL; |
ccda7069 | 239 | |
5bfeca31 AS |
240 | old_state = ac->state; |
241 | if (acpi_ac_get_state(ac)) | |
242 | return 0; | |
243 | if (old_state != ac->state) | |
244 | kobject_uevent(&ac->charger.dev->kobj, KOBJ_CHANGE); | |
245 | return 0; | |
246 | } | |
90692404 | 247 | #endif |
cc8ef527 | 248 | static SIMPLE_DEV_PM_OPS(acpi_ac_pm_ops, NULL, acpi_ac_resume); |
5bfeca31 | 249 | |
cc8ef527 | 250 | static int acpi_ac_remove(struct platform_device *pdev) |
1da177e4 | 251 | { |
cc8ef527 | 252 | struct acpi_ac *ac; |
1da177e4 | 253 | |
cc8ef527 | 254 | if (!pdev) |
d550d98d | 255 | return -EINVAL; |
1da177e4 | 256 | |
cc8ef527 ZR |
257 | acpi_remove_notify_handler(ACPI_HANDLE(&pdev->dev), |
258 | ACPI_DEVICE_NOTIFY, acpi_ac_notify_handler); | |
1da177e4 | 259 | |
cc8ef527 | 260 | ac = platform_get_drvdata(pdev); |
d5b4a3d0 AS |
261 | if (ac->charger.dev) |
262 | power_supply_unregister(&ac->charger); | |
cc8ef527 | 263 | |
1da177e4 LT |
264 | kfree(ac); |
265 | ||
d550d98d | 266 | return 0; |
1da177e4 LT |
267 | } |
268 | ||
cc8ef527 ZR |
269 | static const struct acpi_device_id acpi_ac_match[] = { |
270 | { "ACPI0003", 0 }, | |
271 | { } | |
272 | }; | |
273 | MODULE_DEVICE_TABLE(acpi, acpi_ac_match); | |
274 | ||
275 | static struct platform_driver acpi_ac_driver = { | |
276 | .probe = acpi_ac_probe, | |
277 | .remove = acpi_ac_remove, | |
278 | .driver = { | |
279 | .name = "acpi-ac", | |
280 | .owner = THIS_MODULE, | |
281 | .pm = &acpi_ac_pm_ops, | |
282 | .acpi_match_table = ACPI_PTR(acpi_ac_match), | |
283 | }, | |
284 | }; | |
285 | ||
4be44fcd | 286 | static int __init acpi_ac_init(void) |
1da177e4 | 287 | { |
3f86b832 | 288 | int result; |
1da177e4 | 289 | |
4d8316d5 PM |
290 | if (acpi_disabled) |
291 | return -ENODEV; | |
1da177e4 | 292 | |
cc8ef527 | 293 | result = platform_driver_register(&acpi_ac_driver); |
ab0fd674 | 294 | if (result < 0) |
d550d98d | 295 | return -ENODEV; |
1da177e4 | 296 | |
d550d98d | 297 | return 0; |
1da177e4 LT |
298 | } |
299 | ||
4be44fcd | 300 | static void __exit acpi_ac_exit(void) |
1da177e4 | 301 | { |
cc8ef527 | 302 | platform_driver_unregister(&acpi_ac_driver); |
1da177e4 | 303 | } |
1da177e4 LT |
304 | module_init(acpi_ac_init); |
305 | module_exit(acpi_ac_exit); |