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c8f7a62c LB |
1 | /* |
2 | * dock.c - ACPI dock station driver | |
3 | * | |
4 | * Copyright (C) 2006 Kristen Carlson Accardi <kristen.c.accardi@intel.com> | |
5 | * | |
6 | * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ | |
7 | * | |
8 | * This program is free software; you can redistribute it and/or modify | |
9 | * it under the terms of the GNU General Public License as published by | |
10 | * the Free Software Foundation; either version 2 of the License, or (at | |
11 | * your option) any later version. | |
12 | * | |
13 | * This program is distributed in the hope that it will be useful, but | |
14 | * WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
16 | * General Public License for more details. | |
17 | * | |
18 | * You should have received a copy of the GNU General Public License along | |
19 | * with this program; if not, write to the Free Software Foundation, Inc., | |
20 | * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA. | |
21 | * | |
22 | * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ | |
23 | */ | |
24 | ||
25 | #include <linux/kernel.h> | |
26 | #include <linux/module.h> | |
5a0e3ad6 | 27 | #include <linux/slab.h> |
c8f7a62c LB |
28 | #include <linux/init.h> |
29 | #include <linux/types.h> | |
30 | #include <linux/notifier.h> | |
671adbec | 31 | #include <linux/platform_device.h> |
914e2637 | 32 | #include <linux/jiffies.h> |
62a6d7fd | 33 | #include <linux/stddef.h> |
cd73018f | 34 | #include <linux/acpi.h> |
c8f7a62c | 35 | |
3f9eed5c R |
36 | #include "internal.h" |
37 | ||
a192a958 LB |
38 | #define PREFIX "ACPI: " |
39 | ||
7cda93e0 | 40 | #define ACPI_DOCK_DRIVER_DESCRIPTION "ACPI Dock Station Driver" |
c8f7a62c | 41 | |
f52fd66d | 42 | ACPI_MODULE_NAME("dock"); |
c8f7a62c | 43 | MODULE_AUTHOR("Kristen Carlson Accardi"); |
7cda93e0 | 44 | MODULE_DESCRIPTION(ACPI_DOCK_DRIVER_DESCRIPTION); |
c8f7a62c LB |
45 | MODULE_LICENSE("GPL"); |
46 | ||
90ab5ee9 | 47 | static bool immediate_undock = 1; |
a0cd35fd KCA |
48 | module_param(immediate_undock, bool, 0644); |
49 | MODULE_PARM_DESC(immediate_undock, "1 (default) will cause the driver to " | |
50 | "undock immediately when the undock button is pressed, 0 will cause" | |
51 | " the driver to wait for userspace to write the undock sysfs file " | |
52 | " before undocking"); | |
53 | ||
a340af14 FS |
54 | static const struct acpi_device_id dock_device_ids[] = { |
55 | {"LNXDOCK", 0}, | |
56 | {"", 0}, | |
57 | }; | |
58 | MODULE_DEVICE_TABLE(acpi, dock_device_ids); | |
59 | ||
c8f7a62c LB |
60 | struct dock_station { |
61 | acpi_handle handle; | |
62 | unsigned long last_dock_time; | |
63 | u32 flags; | |
c8f7a62c | 64 | struct list_head dependent_devices; |
db350b08 | 65 | |
50d716e4 | 66 | struct list_head sibling; |
db350b08 | 67 | struct platform_device *dock_device; |
c8f7a62c | 68 | }; |
db350b08 SL |
69 | static LIST_HEAD(dock_stations); |
70 | static int dock_station_count; | |
c8f7a62c LB |
71 | |
72 | struct dock_dependent_device { | |
73 | struct list_head list; | |
3b52b21f | 74 | struct acpi_device *adev; |
c8f7a62c LB |
75 | }; |
76 | ||
77 | #define DOCK_DOCKING 0x00000001 | |
a0cd35fd | 78 | #define DOCK_UNDOCKING 0x00000002 |
db350b08 SL |
79 | #define DOCK_IS_DOCK 0x00000010 |
80 | #define DOCK_IS_ATA 0x00000020 | |
81 | #define DOCK_IS_BAT 0x00000040 | |
5669021e KCA |
82 | #define DOCK_EVENT 3 |
83 | #define UNDOCK_EVENT 2 | |
c8f7a62c | 84 | |
f09ce741 RW |
85 | enum dock_callback_type { |
86 | DOCK_CALL_HANDLER, | |
87 | DOCK_CALL_FIXUP, | |
88 | DOCK_CALL_UEVENT, | |
89 | }; | |
90 | ||
c8f7a62c LB |
91 | /***************************************************************************** |
92 | * Dock Dependent device functions * | |
93 | *****************************************************************************/ | |
94 | /** | |
f69cfdd2 | 95 | * add_dock_dependent_device - associate a device with the dock station |
3b52b21f RW |
96 | * @ds: Dock station. |
97 | * @adev: Dependent ACPI device object. | |
c8f7a62c | 98 | * |
f69cfdd2 | 99 | * Add the dependent device to the dock's dependent device list. |
c8f7a62c | 100 | */ |
3b52b21f RW |
101 | static int add_dock_dependent_device(struct dock_station *ds, |
102 | struct acpi_device *adev) | |
c8f7a62c LB |
103 | { |
104 | struct dock_dependent_device *dd; | |
105 | ||
106 | dd = kzalloc(sizeof(*dd), GFP_KERNEL); | |
f69cfdd2 AC |
107 | if (!dd) |
108 | return -ENOMEM; | |
109 | ||
3b52b21f | 110 | dd->adev = adev; |
f69cfdd2 | 111 | INIT_LIST_HEAD(&dd->list); |
c8f7a62c | 112 | list_add_tail(&dd->list, &ds->dependent_devices); |
f69cfdd2 AC |
113 | |
114 | return 0; | |
c8f7a62c LB |
115 | } |
116 | ||
a30c4c5e RW |
117 | static void remove_dock_dependent_devices(struct dock_station *ds) |
118 | { | |
119 | struct dock_dependent_device *dd, *aux; | |
120 | ||
121 | list_for_each_entry_safe(dd, aux, &ds->dependent_devices, list) { | |
122 | list_del(&dd->list); | |
123 | kfree(dd); | |
124 | } | |
125 | } | |
126 | ||
21a31013 | 127 | static void dock_hotplug_event(struct dock_dependent_device *dd, u32 event, |
f09ce741 | 128 | enum dock_callback_type cb_type) |
21a31013 | 129 | { |
edf5bf34 | 130 | struct acpi_device *adev = dd->adev; |
21a31013 | 131 | |
edf5bf34 RW |
132 | acpi_lock_hp_context(); |
133 | ||
134 | if (!adev->hp) | |
2f16817d | 135 | goto out; |
edf5bf34 RW |
136 | |
137 | if (cb_type == DOCK_CALL_FIXUP) { | |
138 | void (*fixup)(struct acpi_device *); | |
139 | ||
140 | fixup = adev->hp->fixup; | |
141 | if (fixup) { | |
142 | acpi_unlock_hp_context(); | |
143 | fixup(adev); | |
144 | return; | |
145 | } | |
be27b3dc RW |
146 | } else if (cb_type == DOCK_CALL_UEVENT) { |
147 | void (*uevent)(struct acpi_device *, u32); | |
148 | ||
149 | uevent = adev->hp->uevent; | |
150 | if (uevent) { | |
151 | acpi_unlock_hp_context(); | |
152 | uevent(adev, event); | |
153 | return; | |
154 | } | |
edf5bf34 RW |
155 | } else { |
156 | int (*notify)(struct acpi_device *, u32); | |
157 | ||
be27b3dc | 158 | notify = adev->hp->notify; |
edf5bf34 RW |
159 | if (notify) { |
160 | acpi_unlock_hp_context(); | |
161 | notify(adev, event); | |
162 | return; | |
163 | } | |
164 | } | |
165 | ||
2f16817d | 166 | out: |
edf5bf34 | 167 | acpi_unlock_hp_context(); |
c8f7a62c LB |
168 | } |
169 | ||
1e2380cd RW |
170 | static struct dock_station *find_dock_station(acpi_handle handle) |
171 | { | |
172 | struct dock_station *ds; | |
173 | ||
174 | list_for_each_entry(ds, &dock_stations, sibling) | |
175 | if (ds->handle == handle) | |
176 | return ds; | |
177 | ||
178 | return NULL; | |
179 | } | |
180 | ||
c8f7a62c LB |
181 | /** |
182 | * find_dock_dependent_device - get a device dependent on this dock | |
183 | * @ds: the dock station | |
3b52b21f | 184 | * @adev: ACPI device object to find. |
c8f7a62c LB |
185 | * |
186 | * iterate over the dependent device list for this dock. If the | |
187 | * dependent device matches the handle, return. | |
188 | */ | |
189 | static struct dock_dependent_device * | |
3b52b21f | 190 | find_dock_dependent_device(struct dock_station *ds, struct acpi_device *adev) |
c8f7a62c LB |
191 | { |
192 | struct dock_dependent_device *dd; | |
193 | ||
ed633e70 | 194 | list_for_each_entry(dd, &ds->dependent_devices, list) |
3b52b21f | 195 | if (adev == dd->adev) |
c8f7a62c | 196 | return dd; |
ed633e70 | 197 | |
c8f7a62c LB |
198 | return NULL; |
199 | } | |
200 | ||
1e2380cd RW |
201 | void register_dock_dependent_device(struct acpi_device *adev, |
202 | acpi_handle dshandle) | |
db350b08 | 203 | { |
1e2380cd | 204 | struct dock_station *ds = find_dock_station(dshandle); |
db350b08 | 205 | |
3b52b21f RW |
206 | if (ds && !find_dock_dependent_device(ds, adev)) |
207 | add_dock_dependent_device(ds, adev); | |
db350b08 SL |
208 | } |
209 | ||
1e2380cd RW |
210 | /***************************************************************************** |
211 | * Dock functions * | |
212 | *****************************************************************************/ | |
db350b08 | 213 | |
c8f7a62c LB |
214 | /** |
215 | * is_dock_device - see if a device is on a dock station | |
3b52b21f | 216 | * @adev: ACPI device object to check. |
c8f7a62c LB |
217 | * |
218 | * If this device is either the dock station itself, | |
219 | * or is a device dependent on the dock station, then it | |
220 | * is a dock device | |
221 | */ | |
3b52b21f | 222 | int is_dock_device(struct acpi_device *adev) |
c8f7a62c | 223 | { |
db350b08 SL |
224 | struct dock_station *dock_station; |
225 | ||
226 | if (!dock_station_count) | |
c8f7a62c LB |
227 | return 0; |
228 | ||
3b52b21f | 229 | if (acpi_dock_match(adev->handle)) |
c8f7a62c | 230 | return 1; |
747479a3 AC |
231 | |
232 | list_for_each_entry(dock_station, &dock_stations, sibling) | |
3b52b21f | 233 | if (find_dock_dependent_device(dock_station, adev)) |
db350b08 | 234 | return 1; |
c8f7a62c LB |
235 | |
236 | return 0; | |
237 | } | |
c8f7a62c LB |
238 | EXPORT_SYMBOL_GPL(is_dock_device); |
239 | ||
240 | /** | |
241 | * dock_present - see if the dock station is present. | |
242 | * @ds: the dock station | |
243 | * | |
244 | * execute the _STA method. note that present does not | |
245 | * imply that we are docked. | |
246 | */ | |
247 | static int dock_present(struct dock_station *ds) | |
248 | { | |
27663c58 | 249 | unsigned long long sta; |
c8f7a62c LB |
250 | acpi_status status; |
251 | ||
252 | if (ds) { | |
253 | status = acpi_evaluate_integer(ds->handle, "_STA", NULL, &sta); | |
254 | if (ACPI_SUCCESS(status) && sta) | |
255 | return 1; | |
256 | } | |
257 | return 0; | |
258 | } | |
259 | ||
c8f7a62c | 260 | /** |
37f90877 RW |
261 | * hot_remove_dock_devices - Remove dock station devices. |
262 | * @ds: Dock station. | |
263 | */ | |
264 | static void hot_remove_dock_devices(struct dock_station *ds) | |
265 | { | |
266 | struct dock_dependent_device *dd; | |
267 | ||
268 | /* | |
269 | * Walk the list in reverse order so that devices that have been added | |
270 | * last are removed first (in case there are some indirect dependencies | |
271 | * between them). | |
272 | */ | |
273 | list_for_each_entry_reverse(dd, &ds->dependent_devices, list) | |
274 | dock_hotplug_event(dd, ACPI_NOTIFY_EJECT_REQUEST, false); | |
275 | ||
276 | list_for_each_entry_reverse(dd, &ds->dependent_devices, list) | |
3b52b21f | 277 | acpi_bus_trim(dd->adev); |
37f90877 RW |
278 | } |
279 | ||
280 | /** | |
281 | * hotplug_dock_devices - Insert devices on a dock station. | |
c8f7a62c | 282 | * @ds: the dock station |
37f90877 | 283 | * @event: either bus check or device check request |
c8f7a62c LB |
284 | * |
285 | * Some devices on the dock station need to have drivers called | |
286 | * to perform hotplug operations after a dock event has occurred. | |
287 | * Traverse the list of dock devices that have registered a | |
288 | * hotplug handler, and call the handler. | |
289 | */ | |
290 | static void hotplug_dock_devices(struct dock_station *ds, u32 event) | |
291 | { | |
292 | struct dock_dependent_device *dd; | |
293 | ||
f09ce741 RW |
294 | /* Call driver specific post-dock fixups. */ |
295 | list_for_each_entry(dd, &ds->dependent_devices, list) | |
296 | dock_hotplug_event(dd, event, DOCK_CALL_FIXUP); | |
297 | ||
37f90877 | 298 | /* Call driver specific hotplug functions. */ |
21a31013 | 299 | list_for_each_entry(dd, &ds->dependent_devices, list) |
f09ce741 | 300 | dock_hotplug_event(dd, event, DOCK_CALL_HANDLER); |
c8f7a62c LB |
301 | |
302 | /* | |
3b52b21f RW |
303 | * Check if all devices have been enumerated already. If not, run |
304 | * acpi_bus_scan() for them and that will cause scan handlers to be | |
305 | * attached to device objects or acpi_drivers to be stopped/started if | |
306 | * they are present. | |
c8f7a62c | 307 | */ |
3b52b21f RW |
308 | list_for_each_entry(dd, &ds->dependent_devices, list) { |
309 | struct acpi_device *adev = dd->adev; | |
310 | ||
311 | if (!acpi_device_enumerated(adev)) { | |
312 | int ret = acpi_bus_scan(adev->handle); | |
313 | if (ret) | |
314 | dev_dbg(&adev->dev, "scan error %d\n", -ret); | |
315 | } | |
316 | } | |
c8f7a62c LB |
317 | } |
318 | ||
319 | static void dock_event(struct dock_station *ds, u32 event, int num) | |
320 | { | |
db350b08 | 321 | struct device *dev = &ds->dock_device->dev; |
66b56821 | 322 | char event_string[13]; |
79a8f70b | 323 | char *envp[] = { event_string, NULL }; |
1253f7aa | 324 | struct dock_dependent_device *dd; |
79a8f70b KCA |
325 | |
326 | if (num == UNDOCK_EVENT) | |
66b56821 | 327 | sprintf(event_string, "EVENT=undock"); |
79a8f70b | 328 | else |
66b56821 | 329 | sprintf(event_string, "EVENT=dock"); |
79a8f70b | 330 | |
5669021e | 331 | /* |
8ea86e0b KCA |
332 | * Indicate that the status of the dock station has |
333 | * changed. | |
5669021e | 334 | */ |
1253f7aa SL |
335 | if (num == DOCK_EVENT) |
336 | kobject_uevent_env(&dev->kobj, KOBJ_CHANGE, envp); | |
337 | ||
21a31013 | 338 | list_for_each_entry(dd, &ds->dependent_devices, list) |
f09ce741 | 339 | dock_hotplug_event(dd, event, DOCK_CALL_UEVENT); |
747479a3 | 340 | |
1253f7aa SL |
341 | if (num != DOCK_EVENT) |
342 | kobject_uevent_env(&dev->kobj, KOBJ_CHANGE, envp); | |
c8f7a62c LB |
343 | } |
344 | ||
c8f7a62c LB |
345 | /** |
346 | * handle_dock - handle a dock event | |
347 | * @ds: the dock station | |
348 | * @dock: to dock, or undock - that is the question | |
349 | * | |
350 | * Execute the _DCK method in response to an acpi event | |
351 | */ | |
352 | static void handle_dock(struct dock_station *ds, int dock) | |
353 | { | |
354 | acpi_status status; | |
355 | struct acpi_object_list arg_list; | |
356 | union acpi_object arg; | |
6a868e17 | 357 | unsigned long long value; |
c8f7a62c | 358 | |
cd73018f | 359 | acpi_handle_info(ds->handle, "%s\n", dock ? "docking" : "undocking"); |
c8f7a62c LB |
360 | |
361 | /* _DCK method has one argument */ | |
362 | arg_list.count = 1; | |
363 | arg_list.pointer = &arg; | |
364 | arg.type = ACPI_TYPE_INTEGER; | |
365 | arg.integer.value = dock; | |
6a868e17 | 366 | status = acpi_evaluate_integer(ds->handle, "_DCK", &arg_list, &value); |
db350b08 | 367 | if (ACPI_FAILURE(status) && status != AE_NOT_FOUND) |
cd73018f TK |
368 | acpi_handle_err(ds->handle, "Failed to execute _DCK (0x%x)\n", |
369 | status); | |
c8f7a62c LB |
370 | } |
371 | ||
372 | static inline void dock(struct dock_station *ds) | |
373 | { | |
374 | handle_dock(ds, 1); | |
375 | } | |
376 | ||
377 | static inline void undock(struct dock_station *ds) | |
378 | { | |
379 | handle_dock(ds, 0); | |
380 | } | |
381 | ||
382 | static inline void begin_dock(struct dock_station *ds) | |
383 | { | |
384 | ds->flags |= DOCK_DOCKING; | |
385 | } | |
386 | ||
387 | static inline void complete_dock(struct dock_station *ds) | |
388 | { | |
389 | ds->flags &= ~(DOCK_DOCKING); | |
390 | ds->last_dock_time = jiffies; | |
391 | } | |
392 | ||
a0cd35fd KCA |
393 | static inline void begin_undock(struct dock_station *ds) |
394 | { | |
395 | ds->flags |= DOCK_UNDOCKING; | |
396 | } | |
397 | ||
398 | static inline void complete_undock(struct dock_station *ds) | |
399 | { | |
400 | ds->flags &= ~(DOCK_UNDOCKING); | |
401 | } | |
402 | ||
c8f7a62c LB |
403 | /** |
404 | * dock_in_progress - see if we are in the middle of handling a dock event | |
405 | * @ds: the dock station | |
406 | * | |
407 | * Sometimes while docking, false dock events can be sent to the driver | |
408 | * because good connections aren't made or some other reason. Ignore these | |
409 | * if we are in the middle of doing something. | |
410 | */ | |
411 | static int dock_in_progress(struct dock_station *ds) | |
412 | { | |
413 | if ((ds->flags & DOCK_DOCKING) || | |
414 | time_before(jiffies, (ds->last_dock_time + HZ))) | |
415 | return 1; | |
416 | return 0; | |
417 | } | |
418 | ||
c80fdbe8 | 419 | /** |
420 | * handle_eject_request - handle an undock request checking for error conditions | |
421 | * | |
422 | * Check to make sure the dock device is still present, then undock and | |
423 | * hotremove all the devices that may need removing. | |
424 | */ | |
425 | static int handle_eject_request(struct dock_station *ds, u32 event) | |
426 | { | |
c80fdbe8 | 427 | if (dock_in_progress(ds)) |
428 | return -EBUSY; | |
429 | ||
430 | /* | |
431 | * here we need to generate the undock | |
432 | * event prior to actually doing the undock | |
433 | * so that the device struct still exists. | |
afd7301d HM |
434 | * Also, even send the dock event if the |
435 | * device is not present anymore | |
c80fdbe8 | 436 | */ |
437 | dock_event(ds, event, UNDOCK_EVENT); | |
afd7301d | 438 | |
37f90877 | 439 | hot_remove_dock_devices(ds); |
c80fdbe8 | 440 | undock(ds); |
c9b5471f JL |
441 | acpi_evaluate_lck(ds->handle, 0); |
442 | acpi_evaluate_ej0(ds->handle); | |
c80fdbe8 | 443 | if (dock_present(ds)) { |
cd73018f | 444 | acpi_handle_err(ds->handle, "Unable to undock!\n"); |
c80fdbe8 | 445 | return -EBUSY; |
446 | } | |
a0cd35fd | 447 | complete_undock(ds); |
c80fdbe8 | 448 | return 0; |
449 | } | |
450 | ||
c8f7a62c | 451 | /** |
1e2380cd RW |
452 | * dock_notify - Handle ACPI dock notification. |
453 | * @adev: Dock station's ACPI device object. | |
454 | * @event: Event code. | |
c8f7a62c LB |
455 | * |
456 | * If we are notified to dock, then check to see if the dock is | |
457 | * present and then dock. Notify all drivers of the dock event, | |
c80fdbe8 | 458 | * and then hotplug and devices that may need hotplugging. |
c8f7a62c | 459 | */ |
1e2380cd | 460 | int dock_notify(struct acpi_device *adev, u32 event) |
c8f7a62c | 461 | { |
1e2380cd RW |
462 | acpi_handle handle = adev->handle; |
463 | struct dock_station *ds = find_dock_station(handle); | |
db350b08 | 464 | int surprise_removal = 0; |
c8f7a62c | 465 | |
1e2380cd RW |
466 | if (!ds) |
467 | return -ENODEV; | |
468 | ||
db350b08 SL |
469 | /* |
470 | * According to acpi spec 3.0a, if a DEVICE_CHECK notification | |
471 | * is sent and _DCK is present, it is assumed to mean an undock | |
472 | * request. | |
473 | */ | |
474 | if ((ds->flags & DOCK_IS_DOCK) && event == ACPI_NOTIFY_DEVICE_CHECK) | |
475 | event = ACPI_NOTIFY_EJECT_REQUEST; | |
476 | ||
477 | /* | |
478 | * dock station: BUS_CHECK - docked or surprise removal | |
479 | * DEVICE_CHECK - undocked | |
480 | * other device: BUS_CHECK/DEVICE_CHECK - added or surprise removal | |
481 | * | |
482 | * To simplify event handling, dock dependent device handler always | |
483 | * get ACPI_NOTIFY_BUS_CHECK/ACPI_NOTIFY_DEVICE_CHECK for add and | |
484 | * ACPI_NOTIFY_EJECT_REQUEST for removal | |
485 | */ | |
c8f7a62c LB |
486 | switch (event) { |
487 | case ACPI_NOTIFY_BUS_CHECK: | |
db350b08 | 488 | case ACPI_NOTIFY_DEVICE_CHECK: |
0a8e5c3d | 489 | if (!dock_in_progress(ds) && !acpi_device_enumerated(adev)) { |
c8f7a62c LB |
490 | begin_dock(ds); |
491 | dock(ds); | |
492 | if (!dock_present(ds)) { | |
cd73018f | 493 | acpi_handle_err(handle, "Unable to dock!\n"); |
8b59560a | 494 | complete_dock(ds); |
c8f7a62c LB |
495 | break; |
496 | } | |
c8f7a62c LB |
497 | hotplug_dock_devices(ds, event); |
498 | complete_dock(ds); | |
499 | dock_event(ds, event, DOCK_EVENT); | |
c9b5471f | 500 | acpi_evaluate_lck(ds->handle, 1); |
3a37898d | 501 | acpi_update_all_gpes(); |
db350b08 | 502 | break; |
c8f7a62c | 503 | } |
db350b08 SL |
504 | if (dock_present(ds) || dock_in_progress(ds)) |
505 | break; | |
506 | /* This is a surprise removal */ | |
507 | surprise_removal = 1; | |
508 | event = ACPI_NOTIFY_EJECT_REQUEST; | |
509 | /* Fall back */ | |
c8f7a62c | 510 | case ACPI_NOTIFY_EJECT_REQUEST: |
a0cd35fd | 511 | begin_undock(ds); |
f730ae18 SL |
512 | if ((immediate_undock && !(ds->flags & DOCK_IS_ATA)) |
513 | || surprise_removal) | |
a0cd35fd KCA |
514 | handle_eject_request(ds, event); |
515 | else | |
516 | dock_event(ds, event, UNDOCK_EVENT); | |
c8f7a62c | 517 | break; |
c8f7a62c | 518 | } |
1e2380cd | 519 | return 0; |
c8f7a62c LB |
520 | } |
521 | ||
c80fdbe8 | 522 | /* |
523 | * show_docked - read method for "docked" file in sysfs | |
524 | */ | |
525 | static ssize_t show_docked(struct device *dev, | |
526 | struct device_attribute *attr, char *buf) | |
527 | { | |
fe06fba2 | 528 | struct dock_station *dock_station = dev->platform_data; |
ab62f9cd | 529 | struct acpi_device *adev = NULL; |
c80fdbe8 | 530 | |
ab62f9cd RW |
531 | acpi_bus_get_device(dock_station->handle, &adev); |
532 | return snprintf(buf, PAGE_SIZE, "%u\n", acpi_device_enumerated(adev)); | |
c80fdbe8 | 533 | } |
e5685b9d | 534 | static DEVICE_ATTR(docked, S_IRUGO, show_docked, NULL); |
c80fdbe8 | 535 | |
a0cd35fd KCA |
536 | /* |
537 | * show_flags - read method for flags file in sysfs | |
538 | */ | |
539 | static ssize_t show_flags(struct device *dev, | |
540 | struct device_attribute *attr, char *buf) | |
541 | { | |
fe06fba2 | 542 | struct dock_station *dock_station = dev->platform_data; |
a0cd35fd KCA |
543 | return snprintf(buf, PAGE_SIZE, "%d\n", dock_station->flags); |
544 | ||
545 | } | |
e5685b9d | 546 | static DEVICE_ATTR(flags, S_IRUGO, show_flags, NULL); |
a0cd35fd | 547 | |
c80fdbe8 | 548 | /* |
549 | * write_undock - write method for "undock" file in sysfs | |
550 | */ | |
551 | static ssize_t write_undock(struct device *dev, struct device_attribute *attr, | |
552 | const char *buf, size_t count) | |
553 | { | |
554 | int ret; | |
fe06fba2 | 555 | struct dock_station *dock_station = dev->platform_data; |
c80fdbe8 | 556 | |
557 | if (!count) | |
558 | return -EINVAL; | |
559 | ||
8112006f | 560 | acpi_scan_lock_acquire(); |
9171f834 | 561 | begin_undock(dock_station); |
c80fdbe8 | 562 | ret = handle_eject_request(dock_station, ACPI_NOTIFY_EJECT_REQUEST); |
8112006f | 563 | acpi_scan_lock_release(); |
c80fdbe8 | 564 | return ret ? ret: count; |
565 | } | |
e5685b9d | 566 | static DEVICE_ATTR(undock, S_IWUSR, NULL, write_undock); |
c80fdbe8 | 567 | |
ac122bb6 IVE |
568 | /* |
569 | * show_dock_uid - read method for "uid" file in sysfs | |
570 | */ | |
571 | static ssize_t show_dock_uid(struct device *dev, | |
572 | struct device_attribute *attr, char *buf) | |
573 | { | |
27663c58 | 574 | unsigned long long lbuf; |
fe06fba2 | 575 | struct dock_station *dock_station = dev->platform_data; |
38ff4ffc KCA |
576 | acpi_status status = acpi_evaluate_integer(dock_station->handle, |
577 | "_UID", NULL, &lbuf); | |
578 | if (ACPI_FAILURE(status)) | |
ac122bb6 | 579 | return 0; |
38ff4ffc | 580 | |
27663c58 | 581 | return snprintf(buf, PAGE_SIZE, "%llx\n", lbuf); |
ac122bb6 | 582 | } |
e5685b9d | 583 | static DEVICE_ATTR(uid, S_IRUGO, show_dock_uid, NULL); |
ac122bb6 | 584 | |
8652b00f SL |
585 | static ssize_t show_dock_type(struct device *dev, |
586 | struct device_attribute *attr, char *buf) | |
587 | { | |
fe06fba2 | 588 | struct dock_station *dock_station = dev->platform_data; |
8652b00f SL |
589 | char *type; |
590 | ||
591 | if (dock_station->flags & DOCK_IS_DOCK) | |
592 | type = "dock_station"; | |
593 | else if (dock_station->flags & DOCK_IS_ATA) | |
594 | type = "ata_bay"; | |
595 | else if (dock_station->flags & DOCK_IS_BAT) | |
596 | type = "battery_bay"; | |
597 | else | |
598 | type = "unknown"; | |
599 | ||
600 | return snprintf(buf, PAGE_SIZE, "%s\n", type); | |
601 | } | |
602 | static DEVICE_ATTR(type, S_IRUGO, show_dock_type, NULL); | |
603 | ||
5f46c2f2 AC |
604 | static struct attribute *dock_attributes[] = { |
605 | &dev_attr_docked.attr, | |
606 | &dev_attr_flags.attr, | |
607 | &dev_attr_undock.attr, | |
608 | &dev_attr_uid.attr, | |
609 | &dev_attr_type.attr, | |
610 | NULL | |
611 | }; | |
612 | ||
613 | static struct attribute_group dock_attribute_group = { | |
614 | .attrs = dock_attributes | |
615 | }; | |
616 | ||
c8f7a62c | 617 | /** |
1e2380cd RW |
618 | * acpi_dock_add - Add a new dock station |
619 | * @adev: Dock station ACPI device object. | |
c8f7a62c | 620 | * |
1e2380cd | 621 | * allocated and initialize a new dock station device. |
c8f7a62c | 622 | */ |
1e2380cd | 623 | void acpi_dock_add(struct acpi_device *adev) |
c8f7a62c | 624 | { |
2efbca4d | 625 | struct dock_station *dock_station, ds = { NULL, }; |
af887449 | 626 | struct platform_device_info pdevinfo; |
1e2380cd | 627 | acpi_handle handle = adev->handle; |
747479a3 | 628 | struct platform_device *dd; |
2efbca4d | 629 | int ret; |
c8f7a62c | 630 | |
af887449 RW |
631 | memset(&pdevinfo, 0, sizeof(pdevinfo)); |
632 | pdevinfo.name = "dock"; | |
633 | pdevinfo.id = dock_station_count; | |
634 | pdevinfo.acpi_node.companion = adev; | |
635 | pdevinfo.data = &ds; | |
636 | pdevinfo.size_data = sizeof(ds); | |
637 | dd = platform_device_register_full(&pdevinfo); | |
747479a3 | 638 | if (IS_ERR(dd)) |
1e2380cd | 639 | return; |
747479a3 AC |
640 | |
641 | dock_station = dd->dev.platform_data; | |
c8f7a62c | 642 | |
c8f7a62c | 643 | dock_station->handle = handle; |
747479a3 | 644 | dock_station->dock_device = dd; |
c8f7a62c | 645 | dock_station->last_dock_time = jiffies - HZ; |
747479a3 | 646 | |
747479a3 | 647 | INIT_LIST_HEAD(&dock_station->sibling); |
747479a3 | 648 | INIT_LIST_HEAD(&dock_station->dependent_devices); |
a0cd35fd | 649 | |
9ef2a9a9 | 650 | /* we want the dock device to send uevents */ |
747479a3 | 651 | dev_set_uevent_suppress(&dd->dev, 0); |
9ef2a9a9 | 652 | |
c9b5471f | 653 | if (acpi_dock_match(handle)) |
db350b08 | 654 | dock_station->flags |= DOCK_IS_DOCK; |
c9b5471f | 655 | if (acpi_ata_match(handle)) |
db350b08 | 656 | dock_station->flags |= DOCK_IS_ATA; |
b43109fa | 657 | if (acpi_device_is_battery(adev)) |
db350b08 SL |
658 | dock_station->flags |= DOCK_IS_BAT; |
659 | ||
747479a3 | 660 | ret = sysfs_create_group(&dd->dev.kobj, &dock_attribute_group); |
8652b00f | 661 | if (ret) |
5f46c2f2 | 662 | goto err_unregister; |
671adbec | 663 | |
c8f7a62c | 664 | /* add the dock station as a device dependent on itself */ |
3b52b21f | 665 | ret = add_dock_dependent_device(dock_station, adev); |
f69cfdd2 | 666 | if (ret) |
5f46c2f2 | 667 | goto err_rmgroup; |
c8f7a62c | 668 | |
db350b08 | 669 | dock_station_count++; |
50d716e4 | 670 | list_add(&dock_station->sibling, &dock_stations); |
1e2380cd RW |
671 | adev->flags.is_dock_station = true; |
672 | dev_info(&adev->dev, "ACPI dock station (docks/bays count: %d)\n", | |
673 | dock_station_count); | |
674 | return; | |
c8f7a62c | 675 | |
5f46c2f2 | 676 | err_rmgroup: |
a30c4c5e | 677 | remove_dock_dependent_devices(dock_station); |
747479a3 | 678 | sysfs_remove_group(&dd->dev.kobj, &dock_attribute_group); |
5f46c2f2 | 679 | err_unregister: |
747479a3 | 680 | platform_device_unregister(dd); |
cd73018f | 681 | acpi_handle_err(handle, "%s encountered error %d\n", __func__, ret); |
c8f7a62c | 682 | } |