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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; | |
21a31013 | 71 | static DEFINE_MUTEX(hotplug_lock); |
c8f7a62c LB |
72 | |
73 | struct dock_dependent_device { | |
74 | struct list_head list; | |
3b52b21f | 75 | struct acpi_device *adev; |
21a31013 RW |
76 | const struct acpi_dock_ops *hp_ops; |
77 | void *hp_context; | |
78 | unsigned int hp_refcount; | |
79 | void (*hp_release)(void *); | |
c8f7a62c LB |
80 | }; |
81 | ||
82 | #define DOCK_DOCKING 0x00000001 | |
a0cd35fd | 83 | #define DOCK_UNDOCKING 0x00000002 |
db350b08 SL |
84 | #define DOCK_IS_DOCK 0x00000010 |
85 | #define DOCK_IS_ATA 0x00000020 | |
86 | #define DOCK_IS_BAT 0x00000040 | |
5669021e KCA |
87 | #define DOCK_EVENT 3 |
88 | #define UNDOCK_EVENT 2 | |
c8f7a62c | 89 | |
f09ce741 RW |
90 | enum dock_callback_type { |
91 | DOCK_CALL_HANDLER, | |
92 | DOCK_CALL_FIXUP, | |
93 | DOCK_CALL_UEVENT, | |
94 | }; | |
95 | ||
c8f7a62c LB |
96 | /***************************************************************************** |
97 | * Dock Dependent device functions * | |
98 | *****************************************************************************/ | |
99 | /** | |
f69cfdd2 | 100 | * add_dock_dependent_device - associate a device with the dock station |
3b52b21f RW |
101 | * @ds: Dock station. |
102 | * @adev: Dependent ACPI device object. | |
c8f7a62c | 103 | * |
f69cfdd2 | 104 | * Add the dependent device to the dock's dependent device list. |
c8f7a62c | 105 | */ |
3b52b21f RW |
106 | static int add_dock_dependent_device(struct dock_station *ds, |
107 | struct acpi_device *adev) | |
c8f7a62c LB |
108 | { |
109 | struct dock_dependent_device *dd; | |
110 | ||
111 | dd = kzalloc(sizeof(*dd), GFP_KERNEL); | |
f69cfdd2 AC |
112 | if (!dd) |
113 | return -ENOMEM; | |
114 | ||
3b52b21f | 115 | dd->adev = adev; |
f69cfdd2 | 116 | INIT_LIST_HEAD(&dd->list); |
c8f7a62c | 117 | list_add_tail(&dd->list, &ds->dependent_devices); |
f69cfdd2 AC |
118 | |
119 | return 0; | |
c8f7a62c LB |
120 | } |
121 | ||
a30c4c5e RW |
122 | static void remove_dock_dependent_devices(struct dock_station *ds) |
123 | { | |
124 | struct dock_dependent_device *dd, *aux; | |
125 | ||
126 | list_for_each_entry_safe(dd, aux, &ds->dependent_devices, list) { | |
127 | list_del(&dd->list); | |
128 | kfree(dd); | |
129 | } | |
130 | } | |
131 | ||
c8f7a62c | 132 | /** |
21a31013 RW |
133 | * dock_init_hotplug - Initialize a hotplug device on a docking station. |
134 | * @dd: Dock-dependent device. | |
135 | * @ops: Dock operations to attach to the dependent device. | |
136 | * @context: Data to pass to the @ops callbacks and @release. | |
137 | * @init: Optional initialization routine to run after setting up context. | |
138 | * @release: Optional release routine to run on removal. | |
c8f7a62c | 139 | */ |
21a31013 RW |
140 | static int dock_init_hotplug(struct dock_dependent_device *dd, |
141 | const struct acpi_dock_ops *ops, void *context, | |
142 | void (*init)(void *), void (*release)(void *)) | |
c8f7a62c | 143 | { |
21a31013 RW |
144 | int ret = 0; |
145 | ||
146 | mutex_lock(&hotplug_lock); | |
4ec24065 | 147 | if (WARN_ON(dd->hp_context)) { |
21a31013 RW |
148 | ret = -EEXIST; |
149 | } else { | |
150 | dd->hp_refcount = 1; | |
151 | dd->hp_ops = ops; | |
152 | dd->hp_context = context; | |
153 | dd->hp_release = release; | |
4ec24065 RW |
154 | if (init) |
155 | init(context); | |
21a31013 | 156 | } |
21a31013 RW |
157 | mutex_unlock(&hotplug_lock); |
158 | return ret; | |
c8f7a62c LB |
159 | } |
160 | ||
161 | /** | |
21a31013 RW |
162 | * dock_release_hotplug - Decrement hotplug reference counter of dock device. |
163 | * @dd: Dock-dependent device. | |
c8f7a62c | 164 | * |
21a31013 RW |
165 | * Decrement the reference counter of @dd and if 0, detach its hotplug |
166 | * operations from it, reset its context pointer and run the optional release | |
167 | * routine if present. | |
c8f7a62c | 168 | */ |
21a31013 | 169 | static void dock_release_hotplug(struct dock_dependent_device *dd) |
c8f7a62c | 170 | { |
21a31013 | 171 | mutex_lock(&hotplug_lock); |
21a31013 | 172 | if (dd->hp_context && !--dd->hp_refcount) { |
4ec24065 RW |
173 | void (*release)(void *) = dd->hp_release; |
174 | void *context = dd->hp_context; | |
175 | ||
21a31013 | 176 | dd->hp_ops = NULL; |
21a31013 | 177 | dd->hp_context = NULL; |
21a31013 | 178 | dd->hp_release = NULL; |
4ec24065 RW |
179 | if (release) |
180 | release(context); | |
21a31013 | 181 | } |
21a31013 RW |
182 | mutex_unlock(&hotplug_lock); |
183 | } | |
184 | ||
185 | static void dock_hotplug_event(struct dock_dependent_device *dd, u32 event, | |
f09ce741 | 186 | enum dock_callback_type cb_type) |
21a31013 | 187 | { |
edf5bf34 | 188 | struct acpi_device *adev = dd->adev; |
21a31013 RW |
189 | acpi_notify_handler cb = NULL; |
190 | bool run = false; | |
191 | ||
edf5bf34 RW |
192 | acpi_lock_hp_context(); |
193 | ||
194 | if (!adev->hp) | |
195 | goto no_context; | |
196 | ||
197 | if (cb_type == DOCK_CALL_FIXUP) { | |
198 | void (*fixup)(struct acpi_device *); | |
199 | ||
200 | fixup = adev->hp->fixup; | |
201 | if (fixup) { | |
202 | acpi_unlock_hp_context(); | |
203 | fixup(adev); | |
204 | return; | |
205 | } | |
206 | } else { | |
207 | int (*notify)(struct acpi_device *, u32); | |
208 | ||
209 | notify = adev->hp->event; | |
210 | if (notify) { | |
211 | acpi_unlock_hp_context(); | |
212 | notify(adev, event); | |
213 | return; | |
214 | } | |
215 | } | |
216 | ||
217 | no_context: | |
218 | acpi_unlock_hp_context(); | |
219 | ||
21a31013 RW |
220 | mutex_lock(&hotplug_lock); |
221 | ||
222 | if (dd->hp_context) { | |
223 | run = true; | |
224 | dd->hp_refcount++; | |
f09ce741 RW |
225 | if (dd->hp_ops) { |
226 | switch (cb_type) { | |
227 | case DOCK_CALL_FIXUP: | |
228 | cb = dd->hp_ops->fixup; | |
229 | break; | |
230 | case DOCK_CALL_UEVENT: | |
231 | cb = dd->hp_ops->uevent; | |
232 | break; | |
233 | default: | |
234 | cb = dd->hp_ops->handler; | |
235 | } | |
236 | } | |
21a31013 RW |
237 | } |
238 | ||
239 | mutex_unlock(&hotplug_lock); | |
240 | ||
241 | if (!run) | |
242 | return; | |
243 | ||
244 | if (cb) | |
3b52b21f | 245 | cb(dd->adev->handle, event, dd->hp_context); |
21a31013 RW |
246 | |
247 | dock_release_hotplug(dd); | |
c8f7a62c LB |
248 | } |
249 | ||
1e2380cd RW |
250 | static struct dock_station *find_dock_station(acpi_handle handle) |
251 | { | |
252 | struct dock_station *ds; | |
253 | ||
254 | list_for_each_entry(ds, &dock_stations, sibling) | |
255 | if (ds->handle == handle) | |
256 | return ds; | |
257 | ||
258 | return NULL; | |
259 | } | |
260 | ||
c8f7a62c LB |
261 | /** |
262 | * find_dock_dependent_device - get a device dependent on this dock | |
263 | * @ds: the dock station | |
3b52b21f | 264 | * @adev: ACPI device object to find. |
c8f7a62c LB |
265 | * |
266 | * iterate over the dependent device list for this dock. If the | |
267 | * dependent device matches the handle, return. | |
268 | */ | |
269 | static struct dock_dependent_device * | |
3b52b21f | 270 | find_dock_dependent_device(struct dock_station *ds, struct acpi_device *adev) |
c8f7a62c LB |
271 | { |
272 | struct dock_dependent_device *dd; | |
273 | ||
ed633e70 | 274 | list_for_each_entry(dd, &ds->dependent_devices, list) |
3b52b21f | 275 | if (adev == dd->adev) |
c8f7a62c | 276 | return dd; |
ed633e70 | 277 | |
c8f7a62c LB |
278 | return NULL; |
279 | } | |
280 | ||
1e2380cd RW |
281 | void register_dock_dependent_device(struct acpi_device *adev, |
282 | acpi_handle dshandle) | |
db350b08 | 283 | { |
1e2380cd | 284 | struct dock_station *ds = find_dock_station(dshandle); |
db350b08 | 285 | |
3b52b21f RW |
286 | if (ds && !find_dock_dependent_device(ds, adev)) |
287 | add_dock_dependent_device(ds, adev); | |
db350b08 SL |
288 | } |
289 | ||
1e2380cd RW |
290 | /***************************************************************************** |
291 | * Dock functions * | |
292 | *****************************************************************************/ | |
db350b08 | 293 | |
c8f7a62c LB |
294 | /** |
295 | * is_dock_device - see if a device is on a dock station | |
3b52b21f | 296 | * @adev: ACPI device object to check. |
c8f7a62c LB |
297 | * |
298 | * If this device is either the dock station itself, | |
299 | * or is a device dependent on the dock station, then it | |
300 | * is a dock device | |
301 | */ | |
3b52b21f | 302 | int is_dock_device(struct acpi_device *adev) |
c8f7a62c | 303 | { |
db350b08 SL |
304 | struct dock_station *dock_station; |
305 | ||
306 | if (!dock_station_count) | |
c8f7a62c LB |
307 | return 0; |
308 | ||
3b52b21f | 309 | if (acpi_dock_match(adev->handle)) |
c8f7a62c | 310 | return 1; |
747479a3 AC |
311 | |
312 | list_for_each_entry(dock_station, &dock_stations, sibling) | |
3b52b21f | 313 | if (find_dock_dependent_device(dock_station, adev)) |
db350b08 | 314 | return 1; |
c8f7a62c LB |
315 | |
316 | return 0; | |
317 | } | |
c8f7a62c LB |
318 | EXPORT_SYMBOL_GPL(is_dock_device); |
319 | ||
320 | /** | |
321 | * dock_present - see if the dock station is present. | |
322 | * @ds: the dock station | |
323 | * | |
324 | * execute the _STA method. note that present does not | |
325 | * imply that we are docked. | |
326 | */ | |
327 | static int dock_present(struct dock_station *ds) | |
328 | { | |
27663c58 | 329 | unsigned long long sta; |
c8f7a62c LB |
330 | acpi_status status; |
331 | ||
332 | if (ds) { | |
333 | status = acpi_evaluate_integer(ds->handle, "_STA", NULL, &sta); | |
334 | if (ACPI_SUCCESS(status) && sta) | |
335 | return 1; | |
336 | } | |
337 | return 0; | |
338 | } | |
339 | ||
c8f7a62c | 340 | /** |
37f90877 RW |
341 | * hot_remove_dock_devices - Remove dock station devices. |
342 | * @ds: Dock station. | |
343 | */ | |
344 | static void hot_remove_dock_devices(struct dock_station *ds) | |
345 | { | |
346 | struct dock_dependent_device *dd; | |
347 | ||
348 | /* | |
349 | * Walk the list in reverse order so that devices that have been added | |
350 | * last are removed first (in case there are some indirect dependencies | |
351 | * between them). | |
352 | */ | |
353 | list_for_each_entry_reverse(dd, &ds->dependent_devices, list) | |
354 | dock_hotplug_event(dd, ACPI_NOTIFY_EJECT_REQUEST, false); | |
355 | ||
356 | list_for_each_entry_reverse(dd, &ds->dependent_devices, list) | |
3b52b21f | 357 | acpi_bus_trim(dd->adev); |
37f90877 RW |
358 | } |
359 | ||
360 | /** | |
361 | * hotplug_dock_devices - Insert devices on a dock station. | |
c8f7a62c | 362 | * @ds: the dock station |
37f90877 | 363 | * @event: either bus check or device check request |
c8f7a62c LB |
364 | * |
365 | * Some devices on the dock station need to have drivers called | |
366 | * to perform hotplug operations after a dock event has occurred. | |
367 | * Traverse the list of dock devices that have registered a | |
368 | * hotplug handler, and call the handler. | |
369 | */ | |
370 | static void hotplug_dock_devices(struct dock_station *ds, u32 event) | |
371 | { | |
372 | struct dock_dependent_device *dd; | |
373 | ||
f09ce741 RW |
374 | /* Call driver specific post-dock fixups. */ |
375 | list_for_each_entry(dd, &ds->dependent_devices, list) | |
376 | dock_hotplug_event(dd, event, DOCK_CALL_FIXUP); | |
377 | ||
37f90877 | 378 | /* Call driver specific hotplug functions. */ |
21a31013 | 379 | list_for_each_entry(dd, &ds->dependent_devices, list) |
f09ce741 | 380 | dock_hotplug_event(dd, event, DOCK_CALL_HANDLER); |
c8f7a62c LB |
381 | |
382 | /* | |
3b52b21f RW |
383 | * Check if all devices have been enumerated already. If not, run |
384 | * acpi_bus_scan() for them and that will cause scan handlers to be | |
385 | * attached to device objects or acpi_drivers to be stopped/started if | |
386 | * they are present. | |
c8f7a62c | 387 | */ |
3b52b21f RW |
388 | list_for_each_entry(dd, &ds->dependent_devices, list) { |
389 | struct acpi_device *adev = dd->adev; | |
390 | ||
391 | if (!acpi_device_enumerated(adev)) { | |
392 | int ret = acpi_bus_scan(adev->handle); | |
393 | if (ret) | |
394 | dev_dbg(&adev->dev, "scan error %d\n", -ret); | |
395 | } | |
396 | } | |
c8f7a62c LB |
397 | } |
398 | ||
399 | static void dock_event(struct dock_station *ds, u32 event, int num) | |
400 | { | |
db350b08 | 401 | struct device *dev = &ds->dock_device->dev; |
66b56821 | 402 | char event_string[13]; |
79a8f70b | 403 | char *envp[] = { event_string, NULL }; |
1253f7aa | 404 | struct dock_dependent_device *dd; |
79a8f70b KCA |
405 | |
406 | if (num == UNDOCK_EVENT) | |
66b56821 | 407 | sprintf(event_string, "EVENT=undock"); |
79a8f70b | 408 | else |
66b56821 | 409 | sprintf(event_string, "EVENT=dock"); |
79a8f70b | 410 | |
5669021e | 411 | /* |
8ea86e0b KCA |
412 | * Indicate that the status of the dock station has |
413 | * changed. | |
5669021e | 414 | */ |
1253f7aa SL |
415 | if (num == DOCK_EVENT) |
416 | kobject_uevent_env(&dev->kobj, KOBJ_CHANGE, envp); | |
417 | ||
21a31013 | 418 | list_for_each_entry(dd, &ds->dependent_devices, list) |
f09ce741 | 419 | dock_hotplug_event(dd, event, DOCK_CALL_UEVENT); |
747479a3 | 420 | |
1253f7aa SL |
421 | if (num != DOCK_EVENT) |
422 | kobject_uevent_env(&dev->kobj, KOBJ_CHANGE, envp); | |
c8f7a62c LB |
423 | } |
424 | ||
c8f7a62c LB |
425 | /** |
426 | * handle_dock - handle a dock event | |
427 | * @ds: the dock station | |
428 | * @dock: to dock, or undock - that is the question | |
429 | * | |
430 | * Execute the _DCK method in response to an acpi event | |
431 | */ | |
432 | static void handle_dock(struct dock_station *ds, int dock) | |
433 | { | |
434 | acpi_status status; | |
435 | struct acpi_object_list arg_list; | |
436 | union acpi_object arg; | |
6a868e17 | 437 | unsigned long long value; |
c8f7a62c | 438 | |
cd73018f | 439 | acpi_handle_info(ds->handle, "%s\n", dock ? "docking" : "undocking"); |
c8f7a62c LB |
440 | |
441 | /* _DCK method has one argument */ | |
442 | arg_list.count = 1; | |
443 | arg_list.pointer = &arg; | |
444 | arg.type = ACPI_TYPE_INTEGER; | |
445 | arg.integer.value = dock; | |
6a868e17 | 446 | status = acpi_evaluate_integer(ds->handle, "_DCK", &arg_list, &value); |
db350b08 | 447 | if (ACPI_FAILURE(status) && status != AE_NOT_FOUND) |
cd73018f TK |
448 | acpi_handle_err(ds->handle, "Failed to execute _DCK (0x%x)\n", |
449 | status); | |
c8f7a62c LB |
450 | } |
451 | ||
452 | static inline void dock(struct dock_station *ds) | |
453 | { | |
454 | handle_dock(ds, 1); | |
455 | } | |
456 | ||
457 | static inline void undock(struct dock_station *ds) | |
458 | { | |
459 | handle_dock(ds, 0); | |
460 | } | |
461 | ||
462 | static inline void begin_dock(struct dock_station *ds) | |
463 | { | |
464 | ds->flags |= DOCK_DOCKING; | |
465 | } | |
466 | ||
467 | static inline void complete_dock(struct dock_station *ds) | |
468 | { | |
469 | ds->flags &= ~(DOCK_DOCKING); | |
470 | ds->last_dock_time = jiffies; | |
471 | } | |
472 | ||
a0cd35fd KCA |
473 | static inline void begin_undock(struct dock_station *ds) |
474 | { | |
475 | ds->flags |= DOCK_UNDOCKING; | |
476 | } | |
477 | ||
478 | static inline void complete_undock(struct dock_station *ds) | |
479 | { | |
480 | ds->flags &= ~(DOCK_UNDOCKING); | |
481 | } | |
482 | ||
c8f7a62c LB |
483 | /** |
484 | * dock_in_progress - see if we are in the middle of handling a dock event | |
485 | * @ds: the dock station | |
486 | * | |
487 | * Sometimes while docking, false dock events can be sent to the driver | |
488 | * because good connections aren't made or some other reason. Ignore these | |
489 | * if we are in the middle of doing something. | |
490 | */ | |
491 | static int dock_in_progress(struct dock_station *ds) | |
492 | { | |
493 | if ((ds->flags & DOCK_DOCKING) || | |
494 | time_before(jiffies, (ds->last_dock_time + HZ))) | |
495 | return 1; | |
496 | return 0; | |
497 | } | |
498 | ||
c8f7a62c LB |
499 | /** |
500 | * register_hotplug_dock_device - register a hotplug function | |
501 | * @handle: the handle of the device | |
1253f7aa | 502 | * @ops: handlers to call after docking |
c8f7a62c | 503 | * @context: device specific data |
21a31013 RW |
504 | * @init: Optional initialization routine to run after registration |
505 | * @release: Optional release routine to run on unregistration | |
c8f7a62c LB |
506 | * |
507 | * If a driver would like to perform a hotplug operation after a dock | |
508 | * event, they can register an acpi_notifiy_handler to be called by | |
509 | * the dock driver after _DCK is executed. | |
510 | */ | |
21a31013 RW |
511 | int register_hotplug_dock_device(acpi_handle handle, |
512 | const struct acpi_dock_ops *ops, void *context, | |
513 | void (*init)(void *), void (*release)(void *)) | |
c8f7a62c LB |
514 | { |
515 | struct dock_dependent_device *dd; | |
db350b08 | 516 | struct dock_station *dock_station; |
3b52b21f | 517 | struct acpi_device *adev; |
61b83695 | 518 | int ret = -EINVAL; |
c8f7a62c | 519 | |
21a31013 RW |
520 | if (WARN_ON(!context)) |
521 | return -EINVAL; | |
522 | ||
db350b08 | 523 | if (!dock_station_count) |
c8f7a62c LB |
524 | return -ENODEV; |
525 | ||
3b52b21f RW |
526 | ret = acpi_bus_get_device(handle, &adev); |
527 | if (ret) | |
528 | return ret; | |
529 | ||
c8f7a62c LB |
530 | /* |
531 | * make sure this handle is for a device dependent on the dock, | |
532 | * this would include the dock station itself | |
533 | */ | |
50d716e4 | 534 | list_for_each_entry(dock_station, &dock_stations, sibling) { |
61b83695 SL |
535 | /* |
536 | * An ATA bay can be in a dock and itself can be ejected | |
3ad2f3fb | 537 | * separately, so there are two 'dock stations' which need the |
61b83695 SL |
538 | * ops |
539 | */ | |
3b52b21f | 540 | dd = find_dock_dependent_device(dock_station, adev); |
21a31013 | 541 | if (dd && !dock_init_hotplug(dd, ops, context, init, release)) |
61b83695 | 542 | ret = 0; |
c8f7a62c LB |
543 | } |
544 | ||
61b83695 | 545 | return ret; |
c8f7a62c | 546 | } |
c8f7a62c LB |
547 | EXPORT_SYMBOL_GPL(register_hotplug_dock_device); |
548 | ||
549 | /** | |
550 | * unregister_hotplug_dock_device - remove yourself from the hotplug list | |
551 | * @handle: the acpi handle of the device | |
552 | */ | |
553 | void unregister_hotplug_dock_device(acpi_handle handle) | |
554 | { | |
555 | struct dock_dependent_device *dd; | |
db350b08 | 556 | struct dock_station *dock_station; |
3b52b21f | 557 | struct acpi_device *adev; |
c8f7a62c | 558 | |
db350b08 | 559 | if (!dock_station_count) |
c8f7a62c LB |
560 | return; |
561 | ||
3b52b21f RW |
562 | if (acpi_bus_get_device(handle, &adev)) |
563 | return; | |
564 | ||
50d716e4 | 565 | list_for_each_entry(dock_station, &dock_stations, sibling) { |
3b52b21f | 566 | dd = find_dock_dependent_device(dock_station, adev); |
db350b08 | 567 | if (dd) |
21a31013 | 568 | dock_release_hotplug(dd); |
db350b08 | 569 | } |
c8f7a62c | 570 | } |
c8f7a62c LB |
571 | EXPORT_SYMBOL_GPL(unregister_hotplug_dock_device); |
572 | ||
c80fdbe8 | 573 | /** |
574 | * handle_eject_request - handle an undock request checking for error conditions | |
575 | * | |
576 | * Check to make sure the dock device is still present, then undock and | |
577 | * hotremove all the devices that may need removing. | |
578 | */ | |
579 | static int handle_eject_request(struct dock_station *ds, u32 event) | |
580 | { | |
c80fdbe8 | 581 | if (dock_in_progress(ds)) |
582 | return -EBUSY; | |
583 | ||
584 | /* | |
585 | * here we need to generate the undock | |
586 | * event prior to actually doing the undock | |
587 | * so that the device struct still exists. | |
afd7301d HM |
588 | * Also, even send the dock event if the |
589 | * device is not present anymore | |
c80fdbe8 | 590 | */ |
591 | dock_event(ds, event, UNDOCK_EVENT); | |
afd7301d | 592 | |
37f90877 | 593 | hot_remove_dock_devices(ds); |
c80fdbe8 | 594 | undock(ds); |
c9b5471f JL |
595 | acpi_evaluate_lck(ds->handle, 0); |
596 | acpi_evaluate_ej0(ds->handle); | |
c80fdbe8 | 597 | if (dock_present(ds)) { |
cd73018f | 598 | acpi_handle_err(ds->handle, "Unable to undock!\n"); |
c80fdbe8 | 599 | return -EBUSY; |
600 | } | |
a0cd35fd | 601 | complete_undock(ds); |
c80fdbe8 | 602 | return 0; |
603 | } | |
604 | ||
c8f7a62c | 605 | /** |
1e2380cd RW |
606 | * dock_notify - Handle ACPI dock notification. |
607 | * @adev: Dock station's ACPI device object. | |
608 | * @event: Event code. | |
c8f7a62c LB |
609 | * |
610 | * If we are notified to dock, then check to see if the dock is | |
611 | * present and then dock. Notify all drivers of the dock event, | |
c80fdbe8 | 612 | * and then hotplug and devices that may need hotplugging. |
c8f7a62c | 613 | */ |
1e2380cd | 614 | int dock_notify(struct acpi_device *adev, u32 event) |
c8f7a62c | 615 | { |
1e2380cd RW |
616 | acpi_handle handle = adev->handle; |
617 | struct dock_station *ds = find_dock_station(handle); | |
db350b08 | 618 | int surprise_removal = 0; |
c8f7a62c | 619 | |
1e2380cd RW |
620 | if (!ds) |
621 | return -ENODEV; | |
622 | ||
db350b08 SL |
623 | /* |
624 | * According to acpi spec 3.0a, if a DEVICE_CHECK notification | |
625 | * is sent and _DCK is present, it is assumed to mean an undock | |
626 | * request. | |
627 | */ | |
628 | if ((ds->flags & DOCK_IS_DOCK) && event == ACPI_NOTIFY_DEVICE_CHECK) | |
629 | event = ACPI_NOTIFY_EJECT_REQUEST; | |
630 | ||
631 | /* | |
632 | * dock station: BUS_CHECK - docked or surprise removal | |
633 | * DEVICE_CHECK - undocked | |
634 | * other device: BUS_CHECK/DEVICE_CHECK - added or surprise removal | |
635 | * | |
636 | * To simplify event handling, dock dependent device handler always | |
637 | * get ACPI_NOTIFY_BUS_CHECK/ACPI_NOTIFY_DEVICE_CHECK for add and | |
638 | * ACPI_NOTIFY_EJECT_REQUEST for removal | |
639 | */ | |
c8f7a62c LB |
640 | switch (event) { |
641 | case ACPI_NOTIFY_BUS_CHECK: | |
db350b08 | 642 | case ACPI_NOTIFY_DEVICE_CHECK: |
0a8e5c3d | 643 | if (!dock_in_progress(ds) && !acpi_device_enumerated(adev)) { |
c8f7a62c LB |
644 | begin_dock(ds); |
645 | dock(ds); | |
646 | if (!dock_present(ds)) { | |
cd73018f | 647 | acpi_handle_err(handle, "Unable to dock!\n"); |
8b59560a | 648 | complete_dock(ds); |
c8f7a62c LB |
649 | break; |
650 | } | |
c8f7a62c LB |
651 | hotplug_dock_devices(ds, event); |
652 | complete_dock(ds); | |
653 | dock_event(ds, event, DOCK_EVENT); | |
c9b5471f | 654 | acpi_evaluate_lck(ds->handle, 1); |
3a37898d | 655 | acpi_update_all_gpes(); |
db350b08 | 656 | break; |
c8f7a62c | 657 | } |
db350b08 SL |
658 | if (dock_present(ds) || dock_in_progress(ds)) |
659 | break; | |
660 | /* This is a surprise removal */ | |
661 | surprise_removal = 1; | |
662 | event = ACPI_NOTIFY_EJECT_REQUEST; | |
663 | /* Fall back */ | |
c8f7a62c | 664 | case ACPI_NOTIFY_EJECT_REQUEST: |
a0cd35fd | 665 | begin_undock(ds); |
f730ae18 SL |
666 | if ((immediate_undock && !(ds->flags & DOCK_IS_ATA)) |
667 | || surprise_removal) | |
a0cd35fd KCA |
668 | handle_eject_request(ds, event); |
669 | else | |
670 | dock_event(ds, event, UNDOCK_EVENT); | |
c8f7a62c | 671 | break; |
c8f7a62c | 672 | } |
1e2380cd | 673 | return 0; |
c8f7a62c LB |
674 | } |
675 | ||
c80fdbe8 | 676 | /* |
677 | * show_docked - read method for "docked" file in sysfs | |
678 | */ | |
679 | static ssize_t show_docked(struct device *dev, | |
680 | struct device_attribute *attr, char *buf) | |
681 | { | |
fe06fba2 | 682 | struct dock_station *dock_station = dev->platform_data; |
ab62f9cd | 683 | struct acpi_device *adev = NULL; |
c80fdbe8 | 684 | |
ab62f9cd RW |
685 | acpi_bus_get_device(dock_station->handle, &adev); |
686 | return snprintf(buf, PAGE_SIZE, "%u\n", acpi_device_enumerated(adev)); | |
c80fdbe8 | 687 | } |
e5685b9d | 688 | static DEVICE_ATTR(docked, S_IRUGO, show_docked, NULL); |
c80fdbe8 | 689 | |
a0cd35fd KCA |
690 | /* |
691 | * show_flags - read method for flags file in sysfs | |
692 | */ | |
693 | static ssize_t show_flags(struct device *dev, | |
694 | struct device_attribute *attr, char *buf) | |
695 | { | |
fe06fba2 | 696 | struct dock_station *dock_station = dev->platform_data; |
a0cd35fd KCA |
697 | return snprintf(buf, PAGE_SIZE, "%d\n", dock_station->flags); |
698 | ||
699 | } | |
e5685b9d | 700 | static DEVICE_ATTR(flags, S_IRUGO, show_flags, NULL); |
a0cd35fd | 701 | |
c80fdbe8 | 702 | /* |
703 | * write_undock - write method for "undock" file in sysfs | |
704 | */ | |
705 | static ssize_t write_undock(struct device *dev, struct device_attribute *attr, | |
706 | const char *buf, size_t count) | |
707 | { | |
708 | int ret; | |
fe06fba2 | 709 | struct dock_station *dock_station = dev->platform_data; |
c80fdbe8 | 710 | |
711 | if (!count) | |
712 | return -EINVAL; | |
713 | ||
8112006f | 714 | acpi_scan_lock_acquire(); |
9171f834 | 715 | begin_undock(dock_station); |
c80fdbe8 | 716 | ret = handle_eject_request(dock_station, ACPI_NOTIFY_EJECT_REQUEST); |
8112006f | 717 | acpi_scan_lock_release(); |
c80fdbe8 | 718 | return ret ? ret: count; |
719 | } | |
e5685b9d | 720 | static DEVICE_ATTR(undock, S_IWUSR, NULL, write_undock); |
c80fdbe8 | 721 | |
ac122bb6 IVE |
722 | /* |
723 | * show_dock_uid - read method for "uid" file in sysfs | |
724 | */ | |
725 | static ssize_t show_dock_uid(struct device *dev, | |
726 | struct device_attribute *attr, char *buf) | |
727 | { | |
27663c58 | 728 | unsigned long long lbuf; |
fe06fba2 | 729 | struct dock_station *dock_station = dev->platform_data; |
38ff4ffc KCA |
730 | acpi_status status = acpi_evaluate_integer(dock_station->handle, |
731 | "_UID", NULL, &lbuf); | |
732 | if (ACPI_FAILURE(status)) | |
ac122bb6 | 733 | return 0; |
38ff4ffc | 734 | |
27663c58 | 735 | return snprintf(buf, PAGE_SIZE, "%llx\n", lbuf); |
ac122bb6 | 736 | } |
e5685b9d | 737 | static DEVICE_ATTR(uid, S_IRUGO, show_dock_uid, NULL); |
ac122bb6 | 738 | |
8652b00f SL |
739 | static ssize_t show_dock_type(struct device *dev, |
740 | struct device_attribute *attr, char *buf) | |
741 | { | |
fe06fba2 | 742 | struct dock_station *dock_station = dev->platform_data; |
8652b00f SL |
743 | char *type; |
744 | ||
745 | if (dock_station->flags & DOCK_IS_DOCK) | |
746 | type = "dock_station"; | |
747 | else if (dock_station->flags & DOCK_IS_ATA) | |
748 | type = "ata_bay"; | |
749 | else if (dock_station->flags & DOCK_IS_BAT) | |
750 | type = "battery_bay"; | |
751 | else | |
752 | type = "unknown"; | |
753 | ||
754 | return snprintf(buf, PAGE_SIZE, "%s\n", type); | |
755 | } | |
756 | static DEVICE_ATTR(type, S_IRUGO, show_dock_type, NULL); | |
757 | ||
5f46c2f2 AC |
758 | static struct attribute *dock_attributes[] = { |
759 | &dev_attr_docked.attr, | |
760 | &dev_attr_flags.attr, | |
761 | &dev_attr_undock.attr, | |
762 | &dev_attr_uid.attr, | |
763 | &dev_attr_type.attr, | |
764 | NULL | |
765 | }; | |
766 | ||
767 | static struct attribute_group dock_attribute_group = { | |
768 | .attrs = dock_attributes | |
769 | }; | |
770 | ||
c8f7a62c | 771 | /** |
1e2380cd RW |
772 | * acpi_dock_add - Add a new dock station |
773 | * @adev: Dock station ACPI device object. | |
c8f7a62c | 774 | * |
1e2380cd | 775 | * allocated and initialize a new dock station device. |
c8f7a62c | 776 | */ |
1e2380cd | 777 | void acpi_dock_add(struct acpi_device *adev) |
c8f7a62c | 778 | { |
2efbca4d | 779 | struct dock_station *dock_station, ds = { NULL, }; |
af887449 | 780 | struct platform_device_info pdevinfo; |
1e2380cd | 781 | acpi_handle handle = adev->handle; |
747479a3 | 782 | struct platform_device *dd; |
2efbca4d | 783 | int ret; |
c8f7a62c | 784 | |
af887449 RW |
785 | memset(&pdevinfo, 0, sizeof(pdevinfo)); |
786 | pdevinfo.name = "dock"; | |
787 | pdevinfo.id = dock_station_count; | |
788 | pdevinfo.acpi_node.companion = adev; | |
789 | pdevinfo.data = &ds; | |
790 | pdevinfo.size_data = sizeof(ds); | |
791 | dd = platform_device_register_full(&pdevinfo); | |
747479a3 | 792 | if (IS_ERR(dd)) |
1e2380cd | 793 | return; |
747479a3 AC |
794 | |
795 | dock_station = dd->dev.platform_data; | |
c8f7a62c | 796 | |
c8f7a62c | 797 | dock_station->handle = handle; |
747479a3 | 798 | dock_station->dock_device = dd; |
c8f7a62c | 799 | dock_station->last_dock_time = jiffies - HZ; |
747479a3 | 800 | |
747479a3 | 801 | INIT_LIST_HEAD(&dock_station->sibling); |
747479a3 | 802 | INIT_LIST_HEAD(&dock_station->dependent_devices); |
a0cd35fd | 803 | |
9ef2a9a9 | 804 | /* we want the dock device to send uevents */ |
747479a3 | 805 | dev_set_uevent_suppress(&dd->dev, 0); |
9ef2a9a9 | 806 | |
c9b5471f | 807 | if (acpi_dock_match(handle)) |
db350b08 | 808 | dock_station->flags |= DOCK_IS_DOCK; |
c9b5471f | 809 | if (acpi_ata_match(handle)) |
db350b08 | 810 | dock_station->flags |= DOCK_IS_ATA; |
b43109fa | 811 | if (acpi_device_is_battery(adev)) |
db350b08 SL |
812 | dock_station->flags |= DOCK_IS_BAT; |
813 | ||
747479a3 | 814 | ret = sysfs_create_group(&dd->dev.kobj, &dock_attribute_group); |
8652b00f | 815 | if (ret) |
5f46c2f2 | 816 | goto err_unregister; |
671adbec | 817 | |
c8f7a62c | 818 | /* add the dock station as a device dependent on itself */ |
3b52b21f | 819 | ret = add_dock_dependent_device(dock_station, adev); |
f69cfdd2 | 820 | if (ret) |
5f46c2f2 | 821 | goto err_rmgroup; |
c8f7a62c | 822 | |
db350b08 | 823 | dock_station_count++; |
50d716e4 | 824 | list_add(&dock_station->sibling, &dock_stations); |
1e2380cd RW |
825 | adev->flags.is_dock_station = true; |
826 | dev_info(&adev->dev, "ACPI dock station (docks/bays count: %d)\n", | |
827 | dock_station_count); | |
828 | return; | |
c8f7a62c | 829 | |
5f46c2f2 | 830 | err_rmgroup: |
a30c4c5e | 831 | remove_dock_dependent_devices(dock_station); |
747479a3 | 832 | sysfs_remove_group(&dd->dev.kobj, &dock_attribute_group); |
5f46c2f2 | 833 | err_unregister: |
747479a3 | 834 | platform_device_unregister(dd); |
cd73018f | 835 | acpi_handle_err(handle, "%s encountered error %d\n", __func__, ret); |
c8f7a62c | 836 | } |