Commit | Line | Data |
---|---|---|
c942fddf | 1 | // SPDX-License-Identifier: GPL-2.0-or-later |
1da177e4 | 2 | /* |
9104457e | 3 | * acpi_ac.c - ACPI AC Adapter Driver (Revision: 27) |
1da177e4 LT |
4 | * |
5 | * Copyright (C) 2001, 2002 Andy Grover <andrew.grover@intel.com> | |
6 | * Copyright (C) 2001, 2002 Paul Diefenbaugh <paul.s.diefenbaugh@intel.com> | |
1da177e4 LT |
7 | */ |
8 | ||
2249ff34 RW |
9 | #define pr_fmt(fmt) "ACPI: AC: " fmt |
10 | ||
1da177e4 LT |
11 | #include <linux/kernel.h> |
12 | #include <linux/module.h> | |
5a0e3ad6 | 13 | #include <linux/slab.h> |
1da177e4 LT |
14 | #include <linux/init.h> |
15 | #include <linux/types.h> | |
0ab5bb64 LT |
16 | #include <linux/dmi.h> |
17 | #include <linux/delay.h> | |
cc8ef527 | 18 | #include <linux/platform_device.h> |
d5b4a3d0 | 19 | #include <linux/power_supply.h> |
616990c9 | 20 | #include <linux/string_choices.h> |
8b48463f | 21 | #include <linux/acpi.h> |
fa93854f | 22 | #include <acpi/battery.h> |
1da177e4 | 23 | |
1da177e4 | 24 | #define ACPI_AC_CLASS "ac_adapter" |
1da177e4 LT |
25 | #define ACPI_AC_DEVICE_NAME "AC Adapter" |
26 | #define ACPI_AC_FILE_STATE "state" | |
27 | #define ACPI_AC_NOTIFY_STATUS 0x80 | |
28 | #define ACPI_AC_STATUS_OFFLINE 0x00 | |
29 | #define ACPI_AC_STATUS_ONLINE 0x01 | |
30 | #define ACPI_AC_STATUS_UNKNOWN 0xFF | |
31 | ||
f52fd66d | 32 | MODULE_AUTHOR("Paul Diefenbaugh"); |
7cda93e0 | 33 | MODULE_DESCRIPTION("ACPI AC Adapter Driver"); |
1da177e4 LT |
34 | MODULE_LICENSE("GPL"); |
35 | ||
58290468 MW |
36 | static int acpi_ac_probe(struct platform_device *pdev); |
37 | static void acpi_ac_remove(struct platform_device *pdev); | |
38 | ||
543a2d11 | 39 | static void acpi_ac_notify(acpi_handle handle, u32 event, void *data); |
98012849 GR |
40 | |
41 | static const struct acpi_device_id ac_device_ids[] = { | |
42 | {"ACPI0003", 0}, | |
43 | {"", 0}, | |
44 | }; | |
45 | MODULE_DEVICE_TABLE(acpi, ac_device_ids); | |
46 | ||
47 | #ifdef CONFIG_PM_SLEEP | |
48 | static int acpi_ac_resume(struct device *dev); | |
49 | #endif | |
50 | static SIMPLE_DEV_PM_OPS(acpi_ac_pm, NULL, acpi_ac_resume); | |
51 | ||
0ab5bb64 | 52 | static int ac_sleep_before_get_state_ms; |
3d730ee6 | 53 | static int ac_only; |
0ab5bb64 | 54 | |
1da177e4 | 55 | struct acpi_ac { |
297d716f KK |
56 | struct power_supply *charger; |
57 | struct power_supply_desc charger_desc; | |
9104457e | 58 | struct acpi_device *device; |
27663c58 | 59 | unsigned long long state; |
4eee4f03 | 60 | struct notifier_block battery_nb; |
1da177e4 LT |
61 | }; |
62 | ||
297d716f | 63 | #define to_acpi_ac(x) power_supply_get_drvdata(x) |
d5b4a3d0 | 64 | |
9104457e | 65 | /* AC Adapter Management */ |
4be44fcd | 66 | static int acpi_ac_get_state(struct acpi_ac *ac) |
1da177e4 | 67 | { |
98012849 GR |
68 | acpi_status status = AE_OK; |
69 | ||
70 | if (!ac) | |
71 | return -EINVAL; | |
1da177e4 | 72 | |
3d730ee6 SS |
73 | if (ac_only) { |
74 | ac->state = 1; | |
75 | return 0; | |
76 | } | |
77 | ||
98012849 | 78 | status = acpi_evaluate_integer(ac->device->handle, "_PSR", NULL, |
cc8ef527 | 79 | &ac->state); |
1da177e4 | 80 | if (ACPI_FAILURE(status)) { |
2249ff34 RW |
81 | acpi_handle_info(ac->device->handle, |
82 | "Error reading AC Adapter state: %s\n", | |
83 | acpi_format_exception(status)); | |
1da177e4 | 84 | ac->state = ACPI_AC_STATUS_UNKNOWN; |
d550d98d | 85 | return -ENODEV; |
1da177e4 | 86 | } |
4be44fcd | 87 | |
d550d98d | 88 | return 0; |
1da177e4 LT |
89 | } |
90 | ||
9104457e | 91 | /* sysfs I/F */ |
3151dbb0 ZR |
92 | static int get_ac_property(struct power_supply *psy, |
93 | enum power_supply_property psp, | |
94 | union power_supply_propval *val) | |
95 | { | |
96 | struct acpi_ac *ac = to_acpi_ac(psy); | |
97 | ||
98 | if (!ac) | |
99 | return -ENODEV; | |
100 | ||
101 | if (acpi_ac_get_state(ac)) | |
102 | return -ENODEV; | |
103 | ||
104 | switch (psp) { | |
105 | case POWER_SUPPLY_PROP_ONLINE: | |
106 | val->intval = ac->state; | |
107 | break; | |
108 | default: | |
109 | return -EINVAL; | |
110 | } | |
4c19851c | 111 | |
3151dbb0 ZR |
112 | return 0; |
113 | } | |
114 | ||
115 | static enum power_supply_property ac_props[] = { | |
116 | POWER_SUPPLY_PROP_ONLINE, | |
117 | }; | |
118 | ||
9104457e | 119 | /* Driver Model */ |
543a2d11 | 120 | static void acpi_ac_notify(acpi_handle handle, u32 event, void *data) |
1da177e4 | 121 | { |
58290468 | 122 | struct acpi_ac *ac = data; |
c7b59371 | 123 | struct acpi_device *adev = ac->device; |
1da177e4 | 124 | |
1da177e4 | 125 | switch (event) { |
f163ff51 | 126 | default: |
c7b59371 | 127 | acpi_handle_debug(adev->handle, "Unsupported event [0x%x]\n", |
2249ff34 | 128 | event); |
57d2dd4b | 129 | fallthrough; |
1da177e4 | 130 | case ACPI_AC_NOTIFY_STATUS: |
03d78252 CL |
131 | case ACPI_NOTIFY_BUS_CHECK: |
132 | case ACPI_NOTIFY_DEVICE_CHECK: | |
0ab5bb64 LT |
133 | /* |
134 | * A buggy BIOS may notify AC first and then sleep for | |
135 | * a specific time before doing actual operations in the | |
136 | * EC event handler (_Qxx). This will cause the AC state | |
137 | * reported by the ACPI event to be incorrect, so wait for a | |
138 | * specific time for the EC event handler to make progress. | |
139 | */ | |
140 | if (ac_sleep_before_get_state_ms > 0) | |
141 | msleep(ac_sleep_before_get_state_ms); | |
142 | ||
1da177e4 | 143 | acpi_ac_get_state(ac); |
c7b59371 MW |
144 | acpi_bus_generate_netlink_event(adev->pnp.device_class, |
145 | dev_name(&adev->dev), event, | |
98012849 | 146 | (u32) ac->state); |
c7b59371 | 147 | acpi_notifier_call_chain(adev, event, (u32) ac->state); |
ac62f521 | 148 | power_supply_changed(ac->charger); |
1da177e4 | 149 | } |
1da177e4 LT |
150 | } |
151 | ||
4eee4f03 AM |
152 | static int acpi_ac_battery_notify(struct notifier_block *nb, |
153 | unsigned long action, void *data) | |
154 | { | |
155 | struct acpi_ac *ac = container_of(nb, struct acpi_ac, battery_nb); | |
156 | struct acpi_bus_event *event = (struct acpi_bus_event *)data; | |
157 | ||
158 | /* | |
159 | * On HP Pavilion dv6-6179er AC status notifications aren't triggered | |
160 | * when adapter is plugged/unplugged. However, battery status | |
935ab850 | 161 | * notifications are triggered when battery starts charging or |
4eee4f03 AM |
162 | * discharging. Re-reading AC status triggers lost AC notifications, |
163 | * if AC status has changed. | |
164 | */ | |
165 | if (strcmp(event->device_class, ACPI_BATTERY_CLASS) == 0 && | |
166 | event->type == ACPI_BATTERY_NOTIFY_STATUS) | |
167 | acpi_ac_get_state(ac); | |
168 | ||
169 | return NOTIFY_OK; | |
170 | } | |
171 | ||
91ea5b1d | 172 | static int __init thinkpad_e530_quirk(const struct dmi_system_id *d) |
0ab5bb64 LT |
173 | { |
174 | ac_sleep_before_get_state_ms = 1000; | |
175 | return 0; | |
176 | } | |
177 | ||
3d730ee6 SS |
178 | static int __init ac_only_quirk(const struct dmi_system_id *d) |
179 | { | |
180 | ac_only = 1; | |
181 | return 0; | |
182 | } | |
183 | ||
04900fa3 | 184 | /* Please keep this list alphabetically sorted */ |
91ea5b1d | 185 | static const struct dmi_system_id ac_dmi_table[] __initconst = { |
3d730ee6 SS |
186 | { |
187 | /* Kodlix GK45 returning incorrect state */ | |
188 | .callback = ac_only_quirk, | |
189 | .matches = { | |
190 | DMI_MATCH(DMI_PRODUCT_NAME, "GK45"), | |
0ab5bb64 LT |
191 | }, |
192 | }, | |
91ea5b1d | 193 | { |
04900fa3 HG |
194 | /* Lenovo Thinkpad e530, see comment in acpi_ac_notify() */ |
195 | .callback = thinkpad_e530_quirk, | |
91ea5b1d | 196 | .matches = { |
04900fa3 HG |
197 | DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"), |
198 | DMI_MATCH(DMI_PRODUCT_NAME, "32597CG"), | |
91ea5b1d CC |
199 | }, |
200 | }, | |
0ab5bb64 LT |
201 | {}, |
202 | }; | |
203 | ||
58290468 | 204 | static int acpi_ac_probe(struct platform_device *pdev) |
1da177e4 | 205 | { |
c7b59371 | 206 | struct acpi_device *adev = ACPI_COMPANION(&pdev->dev); |
297d716f | 207 | struct power_supply_config psy_cfg = {}; |
bc4c9757 MW |
208 | struct acpi_ac *ac; |
209 | int result; | |
cc8ef527 | 210 | |
36bcbec7 | 211 | ac = kzalloc(sizeof(struct acpi_ac), GFP_KERNEL); |
1da177e4 | 212 | if (!ac) |
d550d98d | 213 | return -ENOMEM; |
1da177e4 | 214 | |
c7b59371 MW |
215 | ac->device = adev; |
216 | strcpy(acpi_device_name(adev), ACPI_AC_DEVICE_NAME); | |
217 | strcpy(acpi_device_class(adev), ACPI_AC_CLASS); | |
58290468 MW |
218 | |
219 | platform_set_drvdata(pdev, ac); | |
1da177e4 LT |
220 | |
221 | result = acpi_ac_get_state(ac); | |
222 | if (result) | |
543a2d11 | 223 | goto err_release_ac; |
1da177e4 | 224 | |
297d716f KK |
225 | psy_cfg.drv_data = ac; |
226 | ||
c7b59371 | 227 | ac->charger_desc.name = acpi_device_bid(adev); |
297d716f KK |
228 | ac->charger_desc.type = POWER_SUPPLY_TYPE_MAINS; |
229 | ac->charger_desc.properties = ac_props; | |
230 | ac->charger_desc.num_properties = ARRAY_SIZE(ac_props); | |
231 | ac->charger_desc.get_property = get_ac_property; | |
58290468 | 232 | ac->charger = power_supply_register(&pdev->dev, |
297d716f KK |
233 | &ac->charger_desc, &psy_cfg); |
234 | if (IS_ERR(ac->charger)) { | |
235 | result = PTR_ERR(ac->charger); | |
543a2d11 | 236 | goto err_release_ac; |
297d716f | 237 | } |
1da177e4 | 238 | |
c7b59371 MW |
239 | pr_info("%s [%s] (%s-line)\n", acpi_device_name(adev), |
240 | acpi_device_bid(adev), str_on_off(ac->state)); | |
1da177e4 | 241 | |
4eee4f03 AM |
242 | ac->battery_nb.notifier_call = acpi_ac_battery_notify; |
243 | register_acpi_notifier(&ac->battery_nb); | |
543a2d11 | 244 | |
c7b59371 | 245 | result = acpi_dev_install_notify_handler(adev, ACPI_ALL_NOTIFY, |
58290468 | 246 | acpi_ac_notify, ac); |
9104457e | 247 | if (result) |
543a2d11 MW |
248 | goto err_unregister; |
249 | ||
250 | return 0; | |
251 | ||
252 | err_unregister: | |
253 | power_supply_unregister(ac->charger); | |
254 | unregister_acpi_notifier(&ac->battery_nb); | |
255 | err_release_ac: | |
256 | kfree(ac); | |
1da177e4 | 257 | |
d550d98d | 258 | return result; |
1da177e4 LT |
259 | } |
260 | ||
90692404 | 261 | #ifdef CONFIG_PM_SLEEP |
ccda7069 | 262 | static int acpi_ac_resume(struct device *dev) |
5bfeca31 | 263 | { |
58290468 | 264 | struct acpi_ac *ac = dev_get_drvdata(dev); |
9104457e | 265 | unsigned int old_state; |
ccda7069 | 266 | |
5bfeca31 AS |
267 | old_state = ac->state; |
268 | if (acpi_ac_get_state(ac)) | |
269 | return 0; | |
270 | if (old_state != ac->state) | |
ac62f521 | 271 | power_supply_changed(ac->charger); |
4c19851c | 272 | |
5bfeca31 AS |
273 | return 0; |
274 | } | |
06521c2e SK |
275 | #else |
276 | #define acpi_ac_resume NULL | |
90692404 | 277 | #endif |
5bfeca31 | 278 | |
58290468 | 279 | static void acpi_ac_remove(struct platform_device *pdev) |
1da177e4 | 280 | { |
58290468 | 281 | struct acpi_ac *ac = platform_get_drvdata(pdev); |
1da177e4 | 282 | |
58290468 | 283 | acpi_dev_remove_notify_handler(ac->device, ACPI_ALL_NOTIFY, |
543a2d11 | 284 | acpi_ac_notify); |
297d716f | 285 | power_supply_unregister(ac->charger); |
4eee4f03 | 286 | unregister_acpi_notifier(&ac->battery_nb); |
cc8ef527 | 287 | |
1da177e4 | 288 | kfree(ac); |
1da177e4 LT |
289 | } |
290 | ||
58290468 MW |
291 | static struct platform_driver acpi_ac_driver = { |
292 | .probe = acpi_ac_probe, | |
293 | .remove_new = acpi_ac_remove, | |
294 | .driver = { | |
295 | .name = "ac", | |
296 | .acpi_match_table = ac_device_ids, | |
297 | .pm = &acpi_ac_pm, | |
298 | }, | |
299 | }; | |
300 | ||
4be44fcd | 301 | static int __init acpi_ac_init(void) |
1da177e4 | 302 | { |
3f86b832 | 303 | int result; |
1da177e4 | 304 | |
4d8316d5 PM |
305 | if (acpi_disabled) |
306 | return -ENODEV; | |
1da177e4 | 307 | |
57a18322 HG |
308 | if (acpi_quirk_skip_acpi_ac_and_battery()) |
309 | return -ENODEV; | |
91ea5b1d | 310 | |
57a18322 | 311 | dmi_check_system(ac_dmi_table); |
af3ec837 | 312 | |
58290468 | 313 | result = platform_driver_register(&acpi_ac_driver); |
9104457e | 314 | if (result < 0) |
d550d98d | 315 | return -ENODEV; |
1da177e4 | 316 | |
d550d98d | 317 | return 0; |
1da177e4 LT |
318 | } |
319 | ||
4be44fcd | 320 | static void __exit acpi_ac_exit(void) |
1da177e4 | 321 | { |
58290468 | 322 | platform_driver_unregister(&acpi_ac_driver); |
1da177e4 | 323 | } |
1da177e4 LT |
324 | module_init(acpi_ac_init); |
325 | module_exit(acpi_ac_exit); |