Commit | Line | Data |
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c942fddf | 1 | // SPDX-License-Identifier: GPL-2.0-or-later |
c8f7a62c LB |
2 | /* |
3 | * dock.c - ACPI dock station driver | |
4 | * | |
8cc25681 RW |
5 | * Copyright (C) 2006, 2014, Intel Corp. |
6 | * Author: Kristen Carlson Accardi <kristen.c.accardi@intel.com> | |
7 | * Rafael J. Wysocki <rafael.j.wysocki@intel.com> | |
c8f7a62c LB |
8 | */ |
9 | ||
10 | #include <linux/kernel.h> | |
0f093e95 | 11 | #include <linux/moduleparam.h> |
5a0e3ad6 | 12 | #include <linux/slab.h> |
c8f7a62c LB |
13 | #include <linux/init.h> |
14 | #include <linux/types.h> | |
15 | #include <linux/notifier.h> | |
671adbec | 16 | #include <linux/platform_device.h> |
914e2637 | 17 | #include <linux/jiffies.h> |
62a6d7fd | 18 | #include <linux/stddef.h> |
cd73018f | 19 | #include <linux/acpi.h> |
c8f7a62c | 20 | |
3f9eed5c R |
21 | #include "internal.h" |
22 | ||
90ab5ee9 | 23 | static bool immediate_undock = 1; |
a0cd35fd KCA |
24 | module_param(immediate_undock, bool, 0644); |
25 | MODULE_PARM_DESC(immediate_undock, "1 (default) will cause the driver to " | |
26 | "undock immediately when the undock button is pressed, 0 will cause" | |
27 | " the driver to wait for userspace to write the undock sysfs file " | |
28 | " before undocking"); | |
29 | ||
c8f7a62c LB |
30 | struct dock_station { |
31 | acpi_handle handle; | |
32 | unsigned long last_dock_time; | |
33 | u32 flags; | |
c8f7a62c | 34 | struct list_head dependent_devices; |
db350b08 | 35 | |
50d716e4 | 36 | struct list_head sibling; |
db350b08 | 37 | struct platform_device *dock_device; |
c8f7a62c | 38 | }; |
db350b08 SL |
39 | static LIST_HEAD(dock_stations); |
40 | static int dock_station_count; | |
c8f7a62c LB |
41 | |
42 | struct dock_dependent_device { | |
43 | struct list_head list; | |
3b52b21f | 44 | struct acpi_device *adev; |
c8f7a62c LB |
45 | }; |
46 | ||
47 | #define DOCK_DOCKING 0x00000001 | |
a0cd35fd | 48 | #define DOCK_UNDOCKING 0x00000002 |
db350b08 SL |
49 | #define DOCK_IS_DOCK 0x00000010 |
50 | #define DOCK_IS_ATA 0x00000020 | |
51 | #define DOCK_IS_BAT 0x00000040 | |
5669021e KCA |
52 | #define DOCK_EVENT 3 |
53 | #define UNDOCK_EVENT 2 | |
c8f7a62c | 54 | |
f09ce741 RW |
55 | enum dock_callback_type { |
56 | DOCK_CALL_HANDLER, | |
57 | DOCK_CALL_FIXUP, | |
58 | DOCK_CALL_UEVENT, | |
59 | }; | |
60 | ||
c8f7a62c LB |
61 | /***************************************************************************** |
62 | * Dock Dependent device functions * | |
63 | *****************************************************************************/ | |
64 | /** | |
f69cfdd2 | 65 | * add_dock_dependent_device - associate a device with the dock station |
3b52b21f RW |
66 | * @ds: Dock station. |
67 | * @adev: Dependent ACPI device object. | |
c8f7a62c | 68 | * |
f69cfdd2 | 69 | * Add the dependent device to the dock's dependent device list. |
c8f7a62c | 70 | */ |
3b52b21f RW |
71 | static int add_dock_dependent_device(struct dock_station *ds, |
72 | struct acpi_device *adev) | |
c8f7a62c LB |
73 | { |
74 | struct dock_dependent_device *dd; | |
75 | ||
76 | dd = kzalloc(sizeof(*dd), GFP_KERNEL); | |
f69cfdd2 AC |
77 | if (!dd) |
78 | return -ENOMEM; | |
79 | ||
3b52b21f | 80 | dd->adev = adev; |
f69cfdd2 | 81 | INIT_LIST_HEAD(&dd->list); |
c8f7a62c | 82 | list_add_tail(&dd->list, &ds->dependent_devices); |
f69cfdd2 AC |
83 | |
84 | return 0; | |
c8f7a62c LB |
85 | } |
86 | ||
21a31013 | 87 | static void dock_hotplug_event(struct dock_dependent_device *dd, u32 event, |
f09ce741 | 88 | enum dock_callback_type cb_type) |
21a31013 | 89 | { |
edf5bf34 | 90 | struct acpi_device *adev = dd->adev; |
21a31013 | 91 | |
edf5bf34 RW |
92 | acpi_lock_hp_context(); |
93 | ||
94 | if (!adev->hp) | |
2f16817d | 95 | goto out; |
edf5bf34 RW |
96 | |
97 | if (cb_type == DOCK_CALL_FIXUP) { | |
98 | void (*fixup)(struct acpi_device *); | |
99 | ||
100 | fixup = adev->hp->fixup; | |
101 | if (fixup) { | |
102 | acpi_unlock_hp_context(); | |
103 | fixup(adev); | |
104 | return; | |
105 | } | |
be27b3dc RW |
106 | } else if (cb_type == DOCK_CALL_UEVENT) { |
107 | void (*uevent)(struct acpi_device *, u32); | |
108 | ||
109 | uevent = adev->hp->uevent; | |
110 | if (uevent) { | |
111 | acpi_unlock_hp_context(); | |
112 | uevent(adev, event); | |
113 | return; | |
114 | } | |
edf5bf34 RW |
115 | } else { |
116 | int (*notify)(struct acpi_device *, u32); | |
117 | ||
be27b3dc | 118 | notify = adev->hp->notify; |
edf5bf34 RW |
119 | if (notify) { |
120 | acpi_unlock_hp_context(); | |
121 | notify(adev, event); | |
122 | return; | |
123 | } | |
124 | } | |
125 | ||
2f16817d | 126 | out: |
edf5bf34 | 127 | acpi_unlock_hp_context(); |
c8f7a62c LB |
128 | } |
129 | ||
1e2380cd RW |
130 | static struct dock_station *find_dock_station(acpi_handle handle) |
131 | { | |
132 | struct dock_station *ds; | |
133 | ||
134 | list_for_each_entry(ds, &dock_stations, sibling) | |
135 | if (ds->handle == handle) | |
136 | return ds; | |
137 | ||
138 | return NULL; | |
139 | } | |
140 | ||
c8f7a62c LB |
141 | /** |
142 | * find_dock_dependent_device - get a device dependent on this dock | |
143 | * @ds: the dock station | |
3b52b21f | 144 | * @adev: ACPI device object to find. |
c8f7a62c LB |
145 | * |
146 | * iterate over the dependent device list for this dock. If the | |
147 | * dependent device matches the handle, return. | |
148 | */ | |
149 | static struct dock_dependent_device * | |
3b52b21f | 150 | find_dock_dependent_device(struct dock_station *ds, struct acpi_device *adev) |
c8f7a62c LB |
151 | { |
152 | struct dock_dependent_device *dd; | |
153 | ||
ed633e70 | 154 | list_for_each_entry(dd, &ds->dependent_devices, list) |
3b52b21f | 155 | if (adev == dd->adev) |
c8f7a62c | 156 | return dd; |
ed633e70 | 157 | |
c8f7a62c LB |
158 | return NULL; |
159 | } | |
160 | ||
1e2380cd RW |
161 | void register_dock_dependent_device(struct acpi_device *adev, |
162 | acpi_handle dshandle) | |
db350b08 | 163 | { |
1e2380cd | 164 | struct dock_station *ds = find_dock_station(dshandle); |
db350b08 | 165 | |
3b52b21f RW |
166 | if (ds && !find_dock_dependent_device(ds, adev)) |
167 | add_dock_dependent_device(ds, adev); | |
db350b08 SL |
168 | } |
169 | ||
1e2380cd RW |
170 | /***************************************************************************** |
171 | * Dock functions * | |
172 | *****************************************************************************/ | |
db350b08 | 173 | |
c8f7a62c LB |
174 | /** |
175 | * is_dock_device - see if a device is on a dock station | |
3b52b21f | 176 | * @adev: ACPI device object to check. |
c8f7a62c LB |
177 | * |
178 | * If this device is either the dock station itself, | |
179 | * or is a device dependent on the dock station, then it | |
180 | * is a dock device | |
181 | */ | |
3b52b21f | 182 | int is_dock_device(struct acpi_device *adev) |
c8f7a62c | 183 | { |
db350b08 SL |
184 | struct dock_station *dock_station; |
185 | ||
186 | if (!dock_station_count) | |
c8f7a62c LB |
187 | return 0; |
188 | ||
3b52b21f | 189 | if (acpi_dock_match(adev->handle)) |
c8f7a62c | 190 | return 1; |
747479a3 AC |
191 | |
192 | list_for_each_entry(dock_station, &dock_stations, sibling) | |
3b52b21f | 193 | if (find_dock_dependent_device(dock_station, adev)) |
db350b08 | 194 | return 1; |
c8f7a62c LB |
195 | |
196 | return 0; | |
197 | } | |
c8f7a62c LB |
198 | EXPORT_SYMBOL_GPL(is_dock_device); |
199 | ||
200 | /** | |
201 | * dock_present - see if the dock station is present. | |
202 | * @ds: the dock station | |
203 | * | |
204 | * execute the _STA method. note that present does not | |
205 | * imply that we are docked. | |
206 | */ | |
207 | static int dock_present(struct dock_station *ds) | |
208 | { | |
27663c58 | 209 | unsigned long long sta; |
c8f7a62c LB |
210 | acpi_status status; |
211 | ||
212 | if (ds) { | |
213 | status = acpi_evaluate_integer(ds->handle, "_STA", NULL, &sta); | |
214 | if (ACPI_SUCCESS(status) && sta) | |
215 | return 1; | |
216 | } | |
217 | return 0; | |
218 | } | |
219 | ||
c8f7a62c | 220 | /** |
37f90877 RW |
221 | * hot_remove_dock_devices - Remove dock station devices. |
222 | * @ds: Dock station. | |
223 | */ | |
224 | static void hot_remove_dock_devices(struct dock_station *ds) | |
225 | { | |
226 | struct dock_dependent_device *dd; | |
227 | ||
228 | /* | |
229 | * Walk the list in reverse order so that devices that have been added | |
230 | * last are removed first (in case there are some indirect dependencies | |
231 | * between them). | |
232 | */ | |
233 | list_for_each_entry_reverse(dd, &ds->dependent_devices, list) | |
be0e9752 AB |
234 | dock_hotplug_event(dd, ACPI_NOTIFY_EJECT_REQUEST, |
235 | DOCK_CALL_HANDLER); | |
37f90877 RW |
236 | |
237 | list_for_each_entry_reverse(dd, &ds->dependent_devices, list) | |
3b52b21f | 238 | acpi_bus_trim(dd->adev); |
37f90877 RW |
239 | } |
240 | ||
241 | /** | |
242 | * hotplug_dock_devices - Insert devices on a dock station. | |
c8f7a62c | 243 | * @ds: the dock station |
37f90877 | 244 | * @event: either bus check or device check request |
c8f7a62c LB |
245 | * |
246 | * Some devices on the dock station need to have drivers called | |
247 | * to perform hotplug operations after a dock event has occurred. | |
248 | * Traverse the list of dock devices that have registered a | |
249 | * hotplug handler, and call the handler. | |
250 | */ | |
251 | static void hotplug_dock_devices(struct dock_station *ds, u32 event) | |
252 | { | |
253 | struct dock_dependent_device *dd; | |
254 | ||
f09ce741 RW |
255 | /* Call driver specific post-dock fixups. */ |
256 | list_for_each_entry(dd, &ds->dependent_devices, list) | |
257 | dock_hotplug_event(dd, event, DOCK_CALL_FIXUP); | |
258 | ||
37f90877 | 259 | /* Call driver specific hotplug functions. */ |
21a31013 | 260 | list_for_each_entry(dd, &ds->dependent_devices, list) |
f09ce741 | 261 | dock_hotplug_event(dd, event, DOCK_CALL_HANDLER); |
c8f7a62c LB |
262 | |
263 | /* | |
3b52b21f RW |
264 | * Check if all devices have been enumerated already. If not, run |
265 | * acpi_bus_scan() for them and that will cause scan handlers to be | |
266 | * attached to device objects or acpi_drivers to be stopped/started if | |
267 | * they are present. | |
c8f7a62c | 268 | */ |
3b52b21f RW |
269 | list_for_each_entry(dd, &ds->dependent_devices, list) { |
270 | struct acpi_device *adev = dd->adev; | |
271 | ||
272 | if (!acpi_device_enumerated(adev)) { | |
273 | int ret = acpi_bus_scan(adev->handle); | |
6ee4bdc2 | 274 | |
3b52b21f RW |
275 | if (ret) |
276 | dev_dbg(&adev->dev, "scan error %d\n", -ret); | |
277 | } | |
278 | } | |
c8f7a62c LB |
279 | } |
280 | ||
281 | static void dock_event(struct dock_station *ds, u32 event, int num) | |
282 | { | |
db350b08 | 283 | struct device *dev = &ds->dock_device->dev; |
66b56821 | 284 | char event_string[13]; |
79a8f70b | 285 | char *envp[] = { event_string, NULL }; |
1253f7aa | 286 | struct dock_dependent_device *dd; |
79a8f70b KCA |
287 | |
288 | if (num == UNDOCK_EVENT) | |
66b56821 | 289 | sprintf(event_string, "EVENT=undock"); |
79a8f70b | 290 | else |
66b56821 | 291 | sprintf(event_string, "EVENT=dock"); |
79a8f70b | 292 | |
5669021e | 293 | /* |
8ea86e0b KCA |
294 | * Indicate that the status of the dock station has |
295 | * changed. | |
5669021e | 296 | */ |
1253f7aa SL |
297 | if (num == DOCK_EVENT) |
298 | kobject_uevent_env(&dev->kobj, KOBJ_CHANGE, envp); | |
299 | ||
21a31013 | 300 | list_for_each_entry(dd, &ds->dependent_devices, list) |
f09ce741 | 301 | dock_hotplug_event(dd, event, DOCK_CALL_UEVENT); |
747479a3 | 302 | |
1253f7aa SL |
303 | if (num != DOCK_EVENT) |
304 | kobject_uevent_env(&dev->kobj, KOBJ_CHANGE, envp); | |
c8f7a62c LB |
305 | } |
306 | ||
c8f7a62c LB |
307 | /** |
308 | * handle_dock - handle a dock event | |
309 | * @ds: the dock station | |
310 | * @dock: to dock, or undock - that is the question | |
311 | * | |
312 | * Execute the _DCK method in response to an acpi event | |
313 | */ | |
314 | static void handle_dock(struct dock_station *ds, int dock) | |
315 | { | |
316 | acpi_status status; | |
317 | struct acpi_object_list arg_list; | |
318 | union acpi_object arg; | |
6a868e17 | 319 | unsigned long long value; |
c8f7a62c | 320 | |
cd73018f | 321 | acpi_handle_info(ds->handle, "%s\n", dock ? "docking" : "undocking"); |
c8f7a62c LB |
322 | |
323 | /* _DCK method has one argument */ | |
324 | arg_list.count = 1; | |
325 | arg_list.pointer = &arg; | |
326 | arg.type = ACPI_TYPE_INTEGER; | |
327 | arg.integer.value = dock; | |
6a868e17 | 328 | status = acpi_evaluate_integer(ds->handle, "_DCK", &arg_list, &value); |
db350b08 | 329 | if (ACPI_FAILURE(status) && status != AE_NOT_FOUND) |
cd73018f TK |
330 | acpi_handle_err(ds->handle, "Failed to execute _DCK (0x%x)\n", |
331 | status); | |
c8f7a62c LB |
332 | } |
333 | ||
334 | static inline void dock(struct dock_station *ds) | |
335 | { | |
336 | handle_dock(ds, 1); | |
337 | } | |
338 | ||
339 | static inline void undock(struct dock_station *ds) | |
340 | { | |
341 | handle_dock(ds, 0); | |
342 | } | |
343 | ||
344 | static inline void begin_dock(struct dock_station *ds) | |
345 | { | |
346 | ds->flags |= DOCK_DOCKING; | |
347 | } | |
348 | ||
349 | static inline void complete_dock(struct dock_station *ds) | |
350 | { | |
351 | ds->flags &= ~(DOCK_DOCKING); | |
352 | ds->last_dock_time = jiffies; | |
353 | } | |
354 | ||
a0cd35fd KCA |
355 | static inline void begin_undock(struct dock_station *ds) |
356 | { | |
357 | ds->flags |= DOCK_UNDOCKING; | |
358 | } | |
359 | ||
360 | static inline void complete_undock(struct dock_station *ds) | |
361 | { | |
362 | ds->flags &= ~(DOCK_UNDOCKING); | |
363 | } | |
364 | ||
c8f7a62c LB |
365 | /** |
366 | * dock_in_progress - see if we are in the middle of handling a dock event | |
367 | * @ds: the dock station | |
368 | * | |
369 | * Sometimes while docking, false dock events can be sent to the driver | |
370 | * because good connections aren't made or some other reason. Ignore these | |
371 | * if we are in the middle of doing something. | |
372 | */ | |
373 | static int dock_in_progress(struct dock_station *ds) | |
374 | { | |
375 | if ((ds->flags & DOCK_DOCKING) || | |
376 | time_before(jiffies, (ds->last_dock_time + HZ))) | |
377 | return 1; | |
378 | return 0; | |
379 | } | |
380 | ||
c80fdbe8 | 381 | /** |
382 | * handle_eject_request - handle an undock request checking for error conditions | |
383 | * | |
384 | * Check to make sure the dock device is still present, then undock and | |
385 | * hotremove all the devices that may need removing. | |
386 | */ | |
387 | static int handle_eject_request(struct dock_station *ds, u32 event) | |
388 | { | |
c80fdbe8 | 389 | if (dock_in_progress(ds)) |
390 | return -EBUSY; | |
391 | ||
392 | /* | |
393 | * here we need to generate the undock | |
394 | * event prior to actually doing the undock | |
395 | * so that the device struct still exists. | |
afd7301d HM |
396 | * Also, even send the dock event if the |
397 | * device is not present anymore | |
c80fdbe8 | 398 | */ |
399 | dock_event(ds, event, UNDOCK_EVENT); | |
afd7301d | 400 | |
37f90877 | 401 | hot_remove_dock_devices(ds); |
c80fdbe8 | 402 | undock(ds); |
c9b5471f JL |
403 | acpi_evaluate_lck(ds->handle, 0); |
404 | acpi_evaluate_ej0(ds->handle); | |
c80fdbe8 | 405 | if (dock_present(ds)) { |
cd73018f | 406 | acpi_handle_err(ds->handle, "Unable to undock!\n"); |
c80fdbe8 | 407 | return -EBUSY; |
408 | } | |
a0cd35fd | 409 | complete_undock(ds); |
c80fdbe8 | 410 | return 0; |
411 | } | |
412 | ||
c8f7a62c | 413 | /** |
1e2380cd RW |
414 | * dock_notify - Handle ACPI dock notification. |
415 | * @adev: Dock station's ACPI device object. | |
416 | * @event: Event code. | |
c8f7a62c LB |
417 | * |
418 | * If we are notified to dock, then check to see if the dock is | |
419 | * present and then dock. Notify all drivers of the dock event, | |
c80fdbe8 | 420 | * and then hotplug and devices that may need hotplugging. |
c8f7a62c | 421 | */ |
1e2380cd | 422 | int dock_notify(struct acpi_device *adev, u32 event) |
c8f7a62c | 423 | { |
1e2380cd RW |
424 | acpi_handle handle = adev->handle; |
425 | struct dock_station *ds = find_dock_station(handle); | |
db350b08 | 426 | int surprise_removal = 0; |
c8f7a62c | 427 | |
1e2380cd RW |
428 | if (!ds) |
429 | return -ENODEV; | |
430 | ||
db350b08 SL |
431 | /* |
432 | * According to acpi spec 3.0a, if a DEVICE_CHECK notification | |
433 | * is sent and _DCK is present, it is assumed to mean an undock | |
434 | * request. | |
435 | */ | |
436 | if ((ds->flags & DOCK_IS_DOCK) && event == ACPI_NOTIFY_DEVICE_CHECK) | |
437 | event = ACPI_NOTIFY_EJECT_REQUEST; | |
438 | ||
439 | /* | |
440 | * dock station: BUS_CHECK - docked or surprise removal | |
441 | * DEVICE_CHECK - undocked | |
442 | * other device: BUS_CHECK/DEVICE_CHECK - added or surprise removal | |
443 | * | |
444 | * To simplify event handling, dock dependent device handler always | |
445 | * get ACPI_NOTIFY_BUS_CHECK/ACPI_NOTIFY_DEVICE_CHECK for add and | |
446 | * ACPI_NOTIFY_EJECT_REQUEST for removal | |
447 | */ | |
c8f7a62c LB |
448 | switch (event) { |
449 | case ACPI_NOTIFY_BUS_CHECK: | |
db350b08 | 450 | case ACPI_NOTIFY_DEVICE_CHECK: |
0a8e5c3d | 451 | if (!dock_in_progress(ds) && !acpi_device_enumerated(adev)) { |
c8f7a62c LB |
452 | begin_dock(ds); |
453 | dock(ds); | |
454 | if (!dock_present(ds)) { | |
cd73018f | 455 | acpi_handle_err(handle, "Unable to dock!\n"); |
8b59560a | 456 | complete_dock(ds); |
c8f7a62c LB |
457 | break; |
458 | } | |
c8f7a62c LB |
459 | hotplug_dock_devices(ds, event); |
460 | complete_dock(ds); | |
461 | dock_event(ds, event, DOCK_EVENT); | |
c9b5471f | 462 | acpi_evaluate_lck(ds->handle, 1); |
3a37898d | 463 | acpi_update_all_gpes(); |
db350b08 | 464 | break; |
c8f7a62c | 465 | } |
db350b08 SL |
466 | if (dock_present(ds) || dock_in_progress(ds)) |
467 | break; | |
468 | /* This is a surprise removal */ | |
469 | surprise_removal = 1; | |
470 | event = ACPI_NOTIFY_EJECT_REQUEST; | |
471 | /* Fall back */ | |
57d2dd4b | 472 | fallthrough; |
c8f7a62c | 473 | case ACPI_NOTIFY_EJECT_REQUEST: |
a0cd35fd | 474 | begin_undock(ds); |
f730ae18 SL |
475 | if ((immediate_undock && !(ds->flags & DOCK_IS_ATA)) |
476 | || surprise_removal) | |
a0cd35fd KCA |
477 | handle_eject_request(ds, event); |
478 | else | |
479 | dock_event(ds, event, UNDOCK_EVENT); | |
c8f7a62c | 480 | break; |
c8f7a62c | 481 | } |
1e2380cd | 482 | return 0; |
c8f7a62c LB |
483 | } |
484 | ||
c80fdbe8 | 485 | /* |
486 | * show_docked - read method for "docked" file in sysfs | |
487 | */ | |
0f39ee83 | 488 | static ssize_t docked_show(struct device *dev, |
c80fdbe8 | 489 | struct device_attribute *attr, char *buf) |
490 | { | |
fe06fba2 | 491 | struct dock_station *dock_station = dev->platform_data; |
ab62f9cd | 492 | struct acpi_device *adev = NULL; |
c80fdbe8 | 493 | |
ab62f9cd | 494 | acpi_bus_get_device(dock_station->handle, &adev); |
d47e983e | 495 | return sysfs_emit(buf, "%u\n", acpi_device_enumerated(adev)); |
c80fdbe8 | 496 | } |
0f39ee83 | 497 | static DEVICE_ATTR_RO(docked); |
c80fdbe8 | 498 | |
a0cd35fd KCA |
499 | /* |
500 | * show_flags - read method for flags file in sysfs | |
501 | */ | |
0f39ee83 | 502 | static ssize_t flags_show(struct device *dev, |
a0cd35fd KCA |
503 | struct device_attribute *attr, char *buf) |
504 | { | |
fe06fba2 | 505 | struct dock_station *dock_station = dev->platform_data; |
6ee4bdc2 | 506 | |
d47e983e | 507 | return sysfs_emit(buf, "%d\n", dock_station->flags); |
a0cd35fd KCA |
508 | |
509 | } | |
0f39ee83 | 510 | static DEVICE_ATTR_RO(flags); |
a0cd35fd | 511 | |
c80fdbe8 | 512 | /* |
513 | * write_undock - write method for "undock" file in sysfs | |
514 | */ | |
0f39ee83 DR |
515 | static ssize_t undock_store(struct device *dev, struct device_attribute *attr, |
516 | const char *buf, size_t count) | |
c80fdbe8 | 517 | { |
518 | int ret; | |
fe06fba2 | 519 | struct dock_station *dock_station = dev->platform_data; |
c80fdbe8 | 520 | |
521 | if (!count) | |
522 | return -EINVAL; | |
523 | ||
8112006f | 524 | acpi_scan_lock_acquire(); |
9171f834 | 525 | begin_undock(dock_station); |
c80fdbe8 | 526 | ret = handle_eject_request(dock_station, ACPI_NOTIFY_EJECT_REQUEST); |
8112006f | 527 | acpi_scan_lock_release(); |
6ee4bdc2 | 528 | return ret ? ret : count; |
c80fdbe8 | 529 | } |
0f39ee83 | 530 | static DEVICE_ATTR_WO(undock); |
c80fdbe8 | 531 | |
ac122bb6 IVE |
532 | /* |
533 | * show_dock_uid - read method for "uid" file in sysfs | |
534 | */ | |
0f39ee83 DR |
535 | static ssize_t uid_show(struct device *dev, |
536 | struct device_attribute *attr, char *buf) | |
ac122bb6 | 537 | { |
27663c58 | 538 | unsigned long long lbuf; |
fe06fba2 | 539 | struct dock_station *dock_station = dev->platform_data; |
6ee4bdc2 | 540 | |
38ff4ffc KCA |
541 | acpi_status status = acpi_evaluate_integer(dock_station->handle, |
542 | "_UID", NULL, &lbuf); | |
543 | if (ACPI_FAILURE(status)) | |
6ee4bdc2 | 544 | return 0; |
38ff4ffc | 545 | |
d47e983e | 546 | return sysfs_emit(buf, "%llx\n", lbuf); |
ac122bb6 | 547 | } |
0f39ee83 | 548 | static DEVICE_ATTR_RO(uid); |
ac122bb6 | 549 | |
0f39ee83 DR |
550 | static ssize_t type_show(struct device *dev, |
551 | struct device_attribute *attr, char *buf) | |
8652b00f | 552 | { |
fe06fba2 | 553 | struct dock_station *dock_station = dev->platform_data; |
8652b00f SL |
554 | char *type; |
555 | ||
556 | if (dock_station->flags & DOCK_IS_DOCK) | |
557 | type = "dock_station"; | |
558 | else if (dock_station->flags & DOCK_IS_ATA) | |
559 | type = "ata_bay"; | |
560 | else if (dock_station->flags & DOCK_IS_BAT) | |
561 | type = "battery_bay"; | |
562 | else | |
563 | type = "unknown"; | |
564 | ||
d47e983e | 565 | return sysfs_emit(buf, "%s\n", type); |
8652b00f | 566 | } |
0f39ee83 | 567 | static DEVICE_ATTR_RO(type); |
8652b00f | 568 | |
5f46c2f2 AC |
569 | static struct attribute *dock_attributes[] = { |
570 | &dev_attr_docked.attr, | |
571 | &dev_attr_flags.attr, | |
572 | &dev_attr_undock.attr, | |
573 | &dev_attr_uid.attr, | |
574 | &dev_attr_type.attr, | |
575 | NULL | |
576 | }; | |
577 | ||
19dc7134 | 578 | static const struct attribute_group dock_attribute_group = { |
5f46c2f2 AC |
579 | .attrs = dock_attributes |
580 | }; | |
581 | ||
c8f7a62c | 582 | /** |
1e2380cd RW |
583 | * acpi_dock_add - Add a new dock station |
584 | * @adev: Dock station ACPI device object. | |
c8f7a62c | 585 | * |
1e2380cd | 586 | * allocated and initialize a new dock station device. |
c8f7a62c | 587 | */ |
1e2380cd | 588 | void acpi_dock_add(struct acpi_device *adev) |
c8f7a62c | 589 | { |
2efbca4d | 590 | struct dock_station *dock_station, ds = { NULL, }; |
af887449 | 591 | struct platform_device_info pdevinfo; |
1e2380cd | 592 | acpi_handle handle = adev->handle; |
747479a3 | 593 | struct platform_device *dd; |
2efbca4d | 594 | int ret; |
c8f7a62c | 595 | |
af887449 RW |
596 | memset(&pdevinfo, 0, sizeof(pdevinfo)); |
597 | pdevinfo.name = "dock"; | |
598 | pdevinfo.id = dock_station_count; | |
ce793486 | 599 | pdevinfo.fwnode = acpi_fwnode_handle(adev); |
af887449 RW |
600 | pdevinfo.data = &ds; |
601 | pdevinfo.size_data = sizeof(ds); | |
602 | dd = platform_device_register_full(&pdevinfo); | |
747479a3 | 603 | if (IS_ERR(dd)) |
1e2380cd | 604 | return; |
747479a3 AC |
605 | |
606 | dock_station = dd->dev.platform_data; | |
c8f7a62c | 607 | |
c8f7a62c | 608 | dock_station->handle = handle; |
747479a3 | 609 | dock_station->dock_device = dd; |
c8f7a62c | 610 | dock_station->last_dock_time = jiffies - HZ; |
747479a3 | 611 | |
747479a3 | 612 | INIT_LIST_HEAD(&dock_station->sibling); |
747479a3 | 613 | INIT_LIST_HEAD(&dock_station->dependent_devices); |
a0cd35fd | 614 | |
9ef2a9a9 | 615 | /* we want the dock device to send uevents */ |
747479a3 | 616 | dev_set_uevent_suppress(&dd->dev, 0); |
9ef2a9a9 | 617 | |
c9b5471f | 618 | if (acpi_dock_match(handle)) |
db350b08 | 619 | dock_station->flags |= DOCK_IS_DOCK; |
c9b5471f | 620 | if (acpi_ata_match(handle)) |
db350b08 | 621 | dock_station->flags |= DOCK_IS_ATA; |
b43109fa | 622 | if (acpi_device_is_battery(adev)) |
db350b08 SL |
623 | dock_station->flags |= DOCK_IS_BAT; |
624 | ||
747479a3 | 625 | ret = sysfs_create_group(&dd->dev.kobj, &dock_attribute_group); |
8652b00f | 626 | if (ret) |
5f46c2f2 | 627 | goto err_unregister; |
671adbec | 628 | |
c8f7a62c | 629 | /* add the dock station as a device dependent on itself */ |
3b52b21f | 630 | ret = add_dock_dependent_device(dock_station, adev); |
f69cfdd2 | 631 | if (ret) |
5f46c2f2 | 632 | goto err_rmgroup; |
c8f7a62c | 633 | |
db350b08 | 634 | dock_station_count++; |
50d716e4 | 635 | list_add(&dock_station->sibling, &dock_stations); |
1e2380cd RW |
636 | adev->flags.is_dock_station = true; |
637 | dev_info(&adev->dev, "ACPI dock station (docks/bays count: %d)\n", | |
638 | dock_station_count); | |
639 | return; | |
c8f7a62c | 640 | |
5f46c2f2 | 641 | err_rmgroup: |
747479a3 | 642 | sysfs_remove_group(&dd->dev.kobj, &dock_attribute_group); |
f311e1c4 | 643 | |
5f46c2f2 | 644 | err_unregister: |
747479a3 | 645 | platform_device_unregister(dd); |
cd73018f | 646 | acpi_handle_err(handle, "%s encountered error %d\n", __func__, ret); |
c8f7a62c | 647 | } |