Commit | Line | Data |
---|---|---|
1da177e4 LT |
1 | /* |
2 | * scan.c - support for transforming the ACPI namespace into individual objects | |
3 | */ | |
4 | ||
5 | #include <linux/module.h> | |
6 | #include <linux/init.h> | |
5a0e3ad6 | 7 | #include <linux/slab.h> |
9b6d97b6 | 8 | #include <linux/kernel.h> |
1da177e4 | 9 | #include <linux/acpi.h> |
74523c90 AK |
10 | #include <linux/signal.h> |
11 | #include <linux/kthread.h> | |
222e82ac | 12 | #include <linux/dmi.h> |
d1efe3c3 | 13 | #include <linux/nls.h> |
1da177e4 | 14 | |
d783156e RW |
15 | #include <asm/pgtable.h> |
16 | ||
e60cc7a6 BH |
17 | #include "internal.h" |
18 | ||
1da177e4 | 19 | #define _COMPONENT ACPI_BUS_COMPONENT |
f52fd66d | 20 | ACPI_MODULE_NAME("scan"); |
4be44fcd | 21 | extern struct acpi_device *acpi_root; |
1da177e4 LT |
22 | |
23 | #define ACPI_BUS_CLASS "system_bus" | |
29b71a1c | 24 | #define ACPI_BUS_HID "LNXSYBUS" |
1da177e4 LT |
25 | #define ACPI_BUS_DEVICE_NAME "System Bus" |
26 | ||
859ac9a4 BH |
27 | #define ACPI_IS_ROOT_DEVICE(device) (!(device)->parent) |
28 | ||
d783156e RW |
29 | #define INVALID_ACPI_HANDLE ((acpi_handle)empty_zero_page) |
30 | ||
683058e3 RW |
31 | /* |
32 | * If set, devices will be hot-removed even if they cannot be put offline | |
33 | * gracefully (from the kernel's standpoint). | |
34 | */ | |
35 | bool acpi_force_hot_remove; | |
36 | ||
620e112c | 37 | static const char *dummy_hid = "device"; |
2b2ae7c7 | 38 | |
e49bd2dd | 39 | static LIST_HEAD(acpi_bus_id_list); |
c511cc19 | 40 | static DEFINE_MUTEX(acpi_scan_lock); |
ca589f94 | 41 | static LIST_HEAD(acpi_scan_handlers_list); |
9090589d | 42 | DEFINE_MUTEX(acpi_device_lock); |
1da177e4 | 43 | LIST_HEAD(acpi_wakeup_device_list); |
e525506f | 44 | static DEFINE_MUTEX(acpi_hp_context_lock); |
1da177e4 | 45 | |
e49bd2dd | 46 | struct acpi_device_bus_id{ |
bb095854 | 47 | char bus_id[15]; |
e49bd2dd ZR |
48 | unsigned int instance_no; |
49 | struct list_head node; | |
1da177e4 | 50 | }; |
29b71a1c | 51 | |
3757b948 RW |
52 | void acpi_scan_lock_acquire(void) |
53 | { | |
54 | mutex_lock(&acpi_scan_lock); | |
55 | } | |
56 | EXPORT_SYMBOL_GPL(acpi_scan_lock_acquire); | |
57 | ||
58 | void acpi_scan_lock_release(void) | |
59 | { | |
60 | mutex_unlock(&acpi_scan_lock); | |
61 | } | |
62 | EXPORT_SYMBOL_GPL(acpi_scan_lock_release); | |
63 | ||
e525506f RW |
64 | void acpi_lock_hp_context(void) |
65 | { | |
66 | mutex_lock(&acpi_hp_context_lock); | |
67 | } | |
68 | ||
69 | void acpi_unlock_hp_context(void) | |
70 | { | |
71 | mutex_unlock(&acpi_hp_context_lock); | |
72 | } | |
73 | ||
5d513205 RW |
74 | void acpi_initialize_hp_context(struct acpi_device *adev, |
75 | struct acpi_hotplug_context *hp, | |
76 | int (*notify)(struct acpi_device *, u32), | |
77 | void (*uevent)(struct acpi_device *, u32)) | |
78 | { | |
79 | acpi_lock_hp_context(); | |
ba574dc8 RW |
80 | hp->notify = notify; |
81 | hp->uevent = uevent; | |
82 | acpi_set_hp_context(adev, hp); | |
5d513205 RW |
83 | acpi_unlock_hp_context(); |
84 | } | |
85 | EXPORT_SYMBOL_GPL(acpi_initialize_hp_context); | |
86 | ||
ca589f94 RW |
87 | int acpi_scan_add_handler(struct acpi_scan_handler *handler) |
88 | { | |
d34afa9d | 89 | if (!handler) |
ca589f94 RW |
90 | return -EINVAL; |
91 | ||
92 | list_add_tail(&handler->list_node, &acpi_scan_handlers_list); | |
93 | return 0; | |
94 | } | |
95 | ||
3f8055c3 RW |
96 | int acpi_scan_add_handler_with_hotplug(struct acpi_scan_handler *handler, |
97 | const char *hotplug_profile_name) | |
98 | { | |
99 | int error; | |
100 | ||
101 | error = acpi_scan_add_handler(handler); | |
102 | if (error) | |
103 | return error; | |
104 | ||
105 | acpi_sysfs_add_hotplug_profile(&handler->hotplug, hotplug_profile_name); | |
106 | return 0; | |
107 | } | |
108 | ||
29b71a1c TR |
109 | /* |
110 | * Creates hid/cid(s) string needed for modalias and uevent | |
111 | * e.g. on a device with hid:IBM0001 and cid:ACPI0001 you get: | |
112 | * char *modalias: "acpi:IBM0001:ACPI0001" | |
3d8e0090 ZR |
113 | * Return: 0: no _HID and no _CID |
114 | * -EINVAL: output error | |
115 | * -ENOMEM: output is truncated | |
29b71a1c | 116 | */ |
b3e572d2 AB |
117 | static int create_modalias(struct acpi_device *acpi_dev, char *modalias, |
118 | int size) | |
119 | { | |
29b71a1c | 120 | int len; |
5c9fcb5d | 121 | int count; |
7f47fa6c | 122 | struct acpi_hardware_id *id; |
29b71a1c | 123 | |
2b2ae7c7 TR |
124 | if (list_empty(&acpi_dev->pnp.ids)) |
125 | return 0; | |
126 | ||
5c9fcb5d | 127 | len = snprintf(modalias, size, "acpi:"); |
29b71a1c TR |
128 | size -= len; |
129 | ||
7f47fa6c BH |
130 | list_for_each_entry(id, &acpi_dev->pnp.ids, list) { |
131 | count = snprintf(&modalias[len], size, "%s:", id->id); | |
3d8e0090 | 132 | if (count < 0) |
98d28d0e | 133 | return -EINVAL; |
3d8e0090 ZR |
134 | if (count >= size) |
135 | return -ENOMEM; | |
5c9fcb5d ZR |
136 | len += count; |
137 | size -= count; | |
138 | } | |
139 | ||
29b71a1c TR |
140 | modalias[len] = '\0'; |
141 | return len; | |
142 | } | |
143 | ||
52870786 MW |
144 | /* |
145 | * acpi_companion_match() - Can we match via ACPI companion device | |
146 | * @dev: Device in question | |
147 | * | |
148 | * Check if the given device has an ACPI companion and if that companion has | |
149 | * a valid list of PNP IDs, and if the device is the first (primary) physical | |
150 | * device associated with it. | |
151 | * | |
152 | * If multiple physical devices are attached to a single ACPI companion, we need | |
153 | * to be careful. The usage scenario for this kind of relationship is that all | |
154 | * of the physical devices in question use resources provided by the ACPI | |
155 | * companion. A typical case is an MFD device where all the sub-devices share | |
156 | * the parent's ACPI companion. In such cases we can only allow the primary | |
157 | * (first) physical device to be matched with the help of the companion's PNP | |
158 | * IDs. | |
159 | * | |
160 | * Additional physical devices sharing the ACPI companion can still use | |
161 | * resources available from it but they will be matched normally using functions | |
162 | * provided by their bus types (and analogously for their modalias). | |
163 | */ | |
164 | static bool acpi_companion_match(const struct device *dev) | |
165 | { | |
166 | struct acpi_device *adev; | |
167 | bool ret; | |
168 | ||
169 | adev = ACPI_COMPANION(dev); | |
170 | if (!adev) | |
171 | return false; | |
172 | ||
173 | if (list_empty(&adev->pnp.ids)) | |
174 | return false; | |
175 | ||
176 | mutex_lock(&adev->physical_node_lock); | |
177 | if (list_empty(&adev->physical_node_list)) { | |
178 | ret = false; | |
179 | } else { | |
180 | const struct acpi_device_physical_node *node; | |
181 | ||
182 | node = list_first_entry(&adev->physical_node_list, | |
183 | struct acpi_device_physical_node, node); | |
184 | ret = node->dev == dev; | |
185 | } | |
186 | mutex_unlock(&adev->physical_node_lock); | |
187 | ||
188 | return ret; | |
189 | } | |
190 | ||
6eb2451f ZR |
191 | /* |
192 | * Creates uevent modalias field for ACPI enumerated devices. | |
193 | * Because the other buses does not support ACPI HIDs & CIDs. | |
194 | * e.g. for a device with hid:IBM0001 and cid:ACPI0001 you get: | |
195 | * "acpi:IBM0001:ACPI0001" | |
196 | */ | |
197 | int acpi_device_uevent_modalias(struct device *dev, struct kobj_uevent_env *env) | |
198 | { | |
6eb2451f ZR |
199 | int len; |
200 | ||
52870786 | 201 | if (!acpi_companion_match(dev)) |
6eb2451f ZR |
202 | return -ENODEV; |
203 | ||
204 | if (add_uevent_var(env, "MODALIAS=")) | |
205 | return -ENOMEM; | |
52870786 | 206 | len = create_modalias(ACPI_COMPANION(dev), &env->buf[env->buflen - 1], |
6eb2451f ZR |
207 | sizeof(env->buf) - env->buflen); |
208 | if (len <= 0) | |
209 | return len; | |
210 | env->buflen += len; | |
211 | return 0; | |
212 | } | |
213 | EXPORT_SYMBOL_GPL(acpi_device_uevent_modalias); | |
214 | ||
215 | /* | |
216 | * Creates modalias sysfs attribute for ACPI enumerated devices. | |
217 | * Because the other buses does not support ACPI HIDs & CIDs. | |
218 | * e.g. for a device with hid:IBM0001 and cid:ACPI0001 you get: | |
219 | * "acpi:IBM0001:ACPI0001" | |
220 | */ | |
221 | int acpi_device_modalias(struct device *dev, char *buf, int size) | |
222 | { | |
6eb2451f ZR |
223 | int len; |
224 | ||
52870786 | 225 | if (!acpi_companion_match(dev)) |
6eb2451f ZR |
226 | return -ENODEV; |
227 | ||
52870786 | 228 | len = create_modalias(ACPI_COMPANION(dev), buf, size -1); |
6eb2451f ZR |
229 | if (len <= 0) |
230 | return len; | |
231 | buf[len++] = '\n'; | |
232 | return len; | |
233 | } | |
234 | EXPORT_SYMBOL_GPL(acpi_device_modalias); | |
235 | ||
29b71a1c TR |
236 | static ssize_t |
237 | acpi_device_modalias_show(struct device *dev, struct device_attribute *attr, char *buf) { | |
238 | struct acpi_device *acpi_dev = to_acpi_device(dev); | |
239 | int len; | |
240 | ||
29b71a1c TR |
241 | len = create_modalias(acpi_dev, buf, 1024); |
242 | if (len <= 0) | |
3d8e0090 | 243 | return len; |
29b71a1c TR |
244 | buf[len++] = '\n'; |
245 | return len; | |
246 | } | |
247 | static DEVICE_ATTR(modalias, 0444, acpi_device_modalias_show, NULL); | |
248 | ||
caa73ea1 | 249 | bool acpi_scan_is_offline(struct acpi_device *adev, bool uevent) |
d22ddcbc RW |
250 | { |
251 | struct acpi_device_physical_node *pn; | |
252 | bool offline = true; | |
253 | ||
254 | mutex_lock(&adev->physical_node_lock); | |
255 | ||
256 | list_for_each_entry(pn, &adev->physical_node_list, node) | |
257 | if (device_supports_offline(pn->dev) && !pn->dev->offline) { | |
caa73ea1 RW |
258 | if (uevent) |
259 | kobject_uevent(&pn->dev->kobj, KOBJ_CHANGE); | |
260 | ||
d22ddcbc RW |
261 | offline = false; |
262 | break; | |
263 | } | |
264 | ||
265 | mutex_unlock(&adev->physical_node_lock); | |
266 | return offline; | |
267 | } | |
268 | ||
7f28ddec RW |
269 | static acpi_status acpi_bus_offline(acpi_handle handle, u32 lvl, void *data, |
270 | void **ret_p) | |
683058e3 RW |
271 | { |
272 | struct acpi_device *device = NULL; | |
273 | struct acpi_device_physical_node *pn; | |
303bfdb1 | 274 | bool second_pass = (bool)data; |
683058e3 RW |
275 | acpi_status status = AE_OK; |
276 | ||
277 | if (acpi_bus_get_device(handle, &device)) | |
278 | return AE_OK; | |
279 | ||
7f28ddec RW |
280 | if (device->handler && !device->handler->hotplug.enabled) { |
281 | *ret_p = &device->dev; | |
282 | return AE_SUPPORT; | |
283 | } | |
284 | ||
683058e3 RW |
285 | mutex_lock(&device->physical_node_lock); |
286 | ||
287 | list_for_each_entry(pn, &device->physical_node_list, node) { | |
288 | int ret; | |
289 | ||
303bfdb1 RW |
290 | if (second_pass) { |
291 | /* Skip devices offlined by the first pass. */ | |
292 | if (pn->put_online) | |
293 | continue; | |
294 | } else { | |
295 | pn->put_online = false; | |
296 | } | |
683058e3 RW |
297 | ret = device_offline(pn->dev); |
298 | if (acpi_force_hot_remove) | |
299 | continue; | |
300 | ||
303bfdb1 RW |
301 | if (ret >= 0) { |
302 | pn->put_online = !ret; | |
303 | } else { | |
304 | *ret_p = pn->dev; | |
305 | if (second_pass) { | |
306 | status = AE_ERROR; | |
307 | break; | |
308 | } | |
683058e3 | 309 | } |
683058e3 RW |
310 | } |
311 | ||
312 | mutex_unlock(&device->physical_node_lock); | |
313 | ||
314 | return status; | |
315 | } | |
316 | ||
7f28ddec RW |
317 | static acpi_status acpi_bus_online(acpi_handle handle, u32 lvl, void *data, |
318 | void **ret_p) | |
683058e3 RW |
319 | { |
320 | struct acpi_device *device = NULL; | |
321 | struct acpi_device_physical_node *pn; | |
322 | ||
323 | if (acpi_bus_get_device(handle, &device)) | |
324 | return AE_OK; | |
325 | ||
326 | mutex_lock(&device->physical_node_lock); | |
327 | ||
328 | list_for_each_entry(pn, &device->physical_node_list, node) | |
329 | if (pn->put_online) { | |
330 | device_online(pn->dev); | |
331 | pn->put_online = false; | |
332 | } | |
333 | ||
334 | mutex_unlock(&device->physical_node_lock); | |
335 | ||
336 | return AE_OK; | |
337 | } | |
338 | ||
d22ddcbc | 339 | static int acpi_scan_try_to_offline(struct acpi_device *device) |
1da177e4 | 340 | { |
5993c467 | 341 | acpi_handle handle = device->handle; |
d22ddcbc | 342 | struct device *errdev = NULL; |
a33ec399 | 343 | acpi_status status; |
f058cdf4 | 344 | |
303bfdb1 RW |
345 | /* |
346 | * Carry out two passes here and ignore errors in the first pass, | |
347 | * because if the devices in question are memory blocks and | |
348 | * CONFIG_MEMCG is set, one of the blocks may hold data structures | |
349 | * that the other blocks depend on, but it is not known in advance which | |
350 | * block holds them. | |
351 | * | |
352 | * If the first pass is successful, the second one isn't needed, though. | |
353 | */ | |
7f28ddec RW |
354 | status = acpi_walk_namespace(ACPI_TYPE_ANY, handle, ACPI_UINT32_MAX, |
355 | NULL, acpi_bus_offline, (void *)false, | |
356 | (void **)&errdev); | |
357 | if (status == AE_SUPPORT) { | |
358 | dev_warn(errdev, "Offline disabled.\n"); | |
359 | acpi_walk_namespace(ACPI_TYPE_ANY, handle, ACPI_UINT32_MAX, | |
360 | acpi_bus_online, NULL, NULL, NULL); | |
7f28ddec RW |
361 | return -EPERM; |
362 | } | |
363 | acpi_bus_offline(handle, 0, (void *)false, (void **)&errdev); | |
303bfdb1 RW |
364 | if (errdev) { |
365 | errdev = NULL; | |
683058e3 | 366 | acpi_walk_namespace(ACPI_TYPE_ANY, handle, ACPI_UINT32_MAX, |
7f28ddec RW |
367 | NULL, acpi_bus_offline, (void *)true, |
368 | (void **)&errdev); | |
303bfdb1 | 369 | if (!errdev || acpi_force_hot_remove) |
7f28ddec RW |
370 | acpi_bus_offline(handle, 0, (void *)true, |
371 | (void **)&errdev); | |
303bfdb1 RW |
372 | |
373 | if (errdev && !acpi_force_hot_remove) { | |
374 | dev_warn(errdev, "Offline failed.\n"); | |
7f28ddec | 375 | acpi_bus_online(handle, 0, NULL, NULL); |
303bfdb1 | 376 | acpi_walk_namespace(ACPI_TYPE_ANY, handle, |
7f28ddec RW |
377 | ACPI_UINT32_MAX, acpi_bus_online, |
378 | NULL, NULL, NULL); | |
303bfdb1 RW |
379 | return -EBUSY; |
380 | } | |
683058e3 | 381 | } |
d22ddcbc RW |
382 | return 0; |
383 | } | |
384 | ||
385 | static int acpi_scan_hot_remove(struct acpi_device *device) | |
386 | { | |
387 | acpi_handle handle = device->handle; | |
388 | unsigned long long sta; | |
389 | acpi_status status; | |
390 | ||
dee15926 TC |
391 | if (device->handler && device->handler->hotplug.demand_offline |
392 | && !acpi_force_hot_remove) { | |
caa73ea1 | 393 | if (!acpi_scan_is_offline(device, true)) |
d22ddcbc RW |
394 | return -EBUSY; |
395 | } else { | |
396 | int error = acpi_scan_try_to_offline(device); | |
397 | if (error) | |
398 | return error; | |
399 | } | |
683058e3 | 400 | |
26d46867 | 401 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
0794469d | 402 | "Hot-removing device %s...\n", dev_name(&device->dev))); |
26d46867 | 403 | |
bfee26db | 404 | acpi_bus_trim(device); |
683058e3 | 405 | |
7d2421f8 | 406 | acpi_evaluate_lck(handle, 0); |
1da177e4 LT |
407 | /* |
408 | * TBD: _EJD support. | |
409 | */ | |
7d2421f8 JL |
410 | status = acpi_evaluate_ej0(handle); |
411 | if (status == AE_NOT_FOUND) | |
412 | return -ENODEV; | |
413 | else if (ACPI_FAILURE(status)) | |
414 | return -EIO; | |
1da177e4 | 415 | |
882fd12e TK |
416 | /* |
417 | * Verify if eject was indeed successful. If not, log an error | |
418 | * message. No need to call _OST since _EJ0 call was made OK. | |
419 | */ | |
420 | status = acpi_evaluate_integer(handle, "_STA", NULL, &sta); | |
421 | if (ACPI_FAILURE(status)) { | |
422 | acpi_handle_warn(handle, | |
423 | "Status check after eject failed (0x%x)\n", status); | |
424 | } else if (sta & ACPI_STA_DEVICE_ENABLED) { | |
425 | acpi_handle_warn(handle, | |
426 | "Eject incomplete - status 0x%llx\n", sta); | |
427 | } | |
428 | ||
a33ec399 RW |
429 | return 0; |
430 | } | |
1da177e4 | 431 | |
443fc820 RW |
432 | static int acpi_scan_device_not_present(struct acpi_device *adev) |
433 | { | |
434 | if (!acpi_device_enumerated(adev)) { | |
435 | dev_warn(&adev->dev, "Still not present\n"); | |
436 | return -EALREADY; | |
437 | } | |
438 | acpi_bus_trim(adev); | |
439 | return 0; | |
440 | } | |
441 | ||
c27b2c33 | 442 | static int acpi_scan_device_check(struct acpi_device *adev) |
a33ec399 | 443 | { |
f943db40 | 444 | int error; |
a33ec399 | 445 | |
443fc820 RW |
446 | acpi_bus_get_status(adev); |
447 | if (adev->status.present || adev->status.functional) { | |
448 | /* | |
449 | * This function is only called for device objects for which | |
450 | * matching scan handlers exist. The only situation in which | |
451 | * the scan handler is not attached to this device object yet | |
452 | * is when the device has just appeared (either it wasn't | |
453 | * present at all before or it was removed and then added | |
454 | * again). | |
455 | */ | |
456 | if (adev->handler) { | |
457 | dev_warn(&adev->dev, "Already enumerated\n"); | |
458 | return -EALREADY; | |
459 | } | |
460 | error = acpi_bus_scan(adev->handle); | |
461 | if (error) { | |
462 | dev_warn(&adev->dev, "Namespace scan failure\n"); | |
463 | return error; | |
464 | } | |
465 | if (!adev->handler) { | |
466 | dev_warn(&adev->dev, "Enumeration failure\n"); | |
467 | error = -ENODEV; | |
468 | } | |
469 | } else { | |
470 | error = acpi_scan_device_not_present(adev); | |
471 | } | |
472 | return error; | |
473 | } | |
474 | ||
475 | static int acpi_scan_bus_check(struct acpi_device *adev) | |
476 | { | |
477 | struct acpi_scan_handler *handler = adev->handler; | |
478 | struct acpi_device *child; | |
479 | int error; | |
480 | ||
481 | acpi_bus_get_status(adev); | |
482 | if (!(adev->status.present || adev->status.functional)) { | |
483 | acpi_scan_device_not_present(adev); | |
484 | return 0; | |
485 | } | |
486 | if (handler && handler->hotplug.scan_dependent) | |
487 | return handler->hotplug.scan_dependent(adev); | |
488 | ||
c27b2c33 RW |
489 | error = acpi_bus_scan(adev->handle); |
490 | if (error) { | |
491 | dev_warn(&adev->dev, "Namespace scan failure\n"); | |
492 | return error; | |
493 | } | |
443fc820 RW |
494 | list_for_each_entry(child, &adev->children, node) { |
495 | error = acpi_scan_bus_check(child); | |
496 | if (error) | |
497 | return error; | |
c27b2c33 RW |
498 | } |
499 | return 0; | |
a33ec399 RW |
500 | } |
501 | ||
3c2cc7ff RW |
502 | static int acpi_generic_hotplug_event(struct acpi_device *adev, u32 type) |
503 | { | |
504 | switch (type) { | |
505 | case ACPI_NOTIFY_BUS_CHECK: | |
506 | return acpi_scan_bus_check(adev); | |
507 | case ACPI_NOTIFY_DEVICE_CHECK: | |
508 | return acpi_scan_device_check(adev); | |
509 | case ACPI_NOTIFY_EJECT_REQUEST: | |
510 | case ACPI_OST_EC_OSPM_EJECT: | |
dd2151be RW |
511 | if (adev->handler && !adev->handler->hotplug.enabled) { |
512 | dev_info(&adev->dev, "Eject disabled\n"); | |
513 | return -EPERM; | |
514 | } | |
700b8422 RW |
515 | acpi_evaluate_ost(adev->handle, ACPI_NOTIFY_EJECT_REQUEST, |
516 | ACPI_OST_SC_EJECT_IN_PROGRESS, NULL); | |
3c2cc7ff RW |
517 | return acpi_scan_hot_remove(adev); |
518 | } | |
519 | return -EINVAL; | |
520 | } | |
521 | ||
1e3bcb59 | 522 | void acpi_device_hotplug(struct acpi_device *adev, u32 src) |
a33ec399 | 523 | { |
a33ec399 | 524 | u32 ost_code = ACPI_OST_SC_NON_SPECIFIC_FAILURE; |
3c2cc7ff | 525 | int error = -ENODEV; |
a33ec399 | 526 | |
683058e3 | 527 | lock_device_hotplug(); |
e0ae8fee | 528 | mutex_lock(&acpi_scan_lock); |
a33ec399 | 529 | |
c27b2c33 RW |
530 | /* |
531 | * The device object's ACPI handle cannot become invalid as long as we | |
3c2cc7ff | 532 | * are holding acpi_scan_lock, but it might have become invalid before |
c27b2c33 RW |
533 | * that lock was acquired. |
534 | */ | |
535 | if (adev->handle == INVALID_ACPI_HANDLE) | |
3c2cc7ff | 536 | goto err_out; |
c27b2c33 | 537 | |
1e2380cd RW |
538 | if (adev->flags.is_dock_station) { |
539 | error = dock_notify(adev, src); | |
540 | } else if (adev->flags.hotplug_notify) { | |
3c2cc7ff | 541 | error = acpi_generic_hotplug_event(adev, src); |
dd2151be RW |
542 | if (error == -EPERM) { |
543 | ost_code = ACPI_OST_SC_EJECT_NOT_SUPPORTED; | |
544 | goto err_out; | |
545 | } | |
3c2cc7ff | 546 | } else { |
be27b3dc | 547 | int (*notify)(struct acpi_device *, u32); |
3c2cc7ff RW |
548 | |
549 | acpi_lock_hp_context(); | |
be27b3dc | 550 | notify = adev->hp ? adev->hp->notify : NULL; |
3c2cc7ff RW |
551 | acpi_unlock_hp_context(); |
552 | /* | |
553 | * There may be additional notify handlers for device objects | |
554 | * without the .event() callback, so ignore them here. | |
555 | */ | |
be27b3dc RW |
556 | if (notify) |
557 | error = notify(adev, src); | |
3c2cc7ff RW |
558 | else |
559 | goto out; | |
a33ec399 | 560 | } |
c27b2c33 RW |
561 | if (!error) |
562 | ost_code = ACPI_OST_SC_SUCCESS; | |
a33ec399 | 563 | |
3c2cc7ff | 564 | err_out: |
700b8422 | 565 | acpi_evaluate_ost(adev->handle, src, ost_code, NULL); |
3c2cc7ff RW |
566 | |
567 | out: | |
78ea4639 | 568 | acpi_bus_put_acpi_device(adev); |
a33ec399 | 569 | mutex_unlock(&acpi_scan_lock); |
e0ae8fee | 570 | unlock_device_hotplug(); |
a33ec399 RW |
571 | } |
572 | ||
836aedb1 RW |
573 | static ssize_t real_power_state_show(struct device *dev, |
574 | struct device_attribute *attr, char *buf) | |
575 | { | |
576 | struct acpi_device *adev = to_acpi_device(dev); | |
577 | int state; | |
578 | int ret; | |
579 | ||
580 | ret = acpi_device_get_power(adev, &state); | |
581 | if (ret) | |
582 | return ret; | |
583 | ||
584 | return sprintf(buf, "%s\n", acpi_power_state_string(state)); | |
585 | } | |
586 | ||
587 | static DEVICE_ATTR(real_power_state, 0444, real_power_state_show, NULL); | |
588 | ||
589 | static ssize_t power_state_show(struct device *dev, | |
590 | struct device_attribute *attr, char *buf) | |
591 | { | |
592 | struct acpi_device *adev = to_acpi_device(dev); | |
593 | ||
594 | return sprintf(buf, "%s\n", acpi_power_state_string(adev->power.state)); | |
595 | } | |
596 | ||
597 | static DEVICE_ATTR(power_state, 0444, power_state_show, NULL); | |
598 | ||
1da177e4 | 599 | static ssize_t |
f883d9db PM |
600 | acpi_eject_store(struct device *d, struct device_attribute *attr, |
601 | const char *buf, size_t count) | |
1da177e4 | 602 | { |
f883d9db | 603 | struct acpi_device *acpi_device = to_acpi_device(d); |
a33ec399 RW |
604 | acpi_object_type not_used; |
605 | acpi_status status; | |
1da177e4 | 606 | |
a33ec399 | 607 | if (!count || buf[0] != '1') |
1da177e4 | 608 | return -EINVAL; |
1da177e4 | 609 | |
a33ec399 RW |
610 | if ((!acpi_device->handler || !acpi_device->handler->hotplug.enabled) |
611 | && !acpi_device->driver) | |
612 | return -ENODEV; | |
613 | ||
614 | status = acpi_get_type(acpi_device->handle, ¬_used); | |
615 | if (ACPI_FAILURE(status) || !acpi_device->flags.ejectable) | |
616 | return -ENODEV; | |
617 | ||
a33ec399 | 618 | get_device(&acpi_device->dev); |
1e3bcb59 | 619 | status = acpi_hotplug_schedule(acpi_device, ACPI_OST_EC_OSPM_EJECT); |
f943db40 RW |
620 | if (ACPI_SUCCESS(status)) |
621 | return count; | |
a33ec399 | 622 | |
f943db40 | 623 | put_device(&acpi_device->dev); |
700b8422 RW |
624 | acpi_evaluate_ost(acpi_device->handle, ACPI_OST_EC_OSPM_EJECT, |
625 | ACPI_OST_SC_NON_SPECIFIC_FAILURE, NULL); | |
5add99cf | 626 | return status == AE_NO_MEMORY ? -ENOMEM : -EAGAIN; |
1da177e4 LT |
627 | } |
628 | ||
f883d9db | 629 | static DEVICE_ATTR(eject, 0200, NULL, acpi_eject_store); |
1da177e4 | 630 | |
e49bd2dd ZR |
631 | static ssize_t |
632 | acpi_device_hid_show(struct device *dev, struct device_attribute *attr, char *buf) { | |
633 | struct acpi_device *acpi_dev = to_acpi_device(dev); | |
1da177e4 | 634 | |
ea8d82fd | 635 | return sprintf(buf, "%s\n", acpi_device_hid(acpi_dev)); |
1da177e4 | 636 | } |
e49bd2dd | 637 | static DEVICE_ATTR(hid, 0444, acpi_device_hid_show, NULL); |
1da177e4 | 638 | |
923d4a45 LZ |
639 | static ssize_t acpi_device_uid_show(struct device *dev, |
640 | struct device_attribute *attr, char *buf) | |
641 | { | |
642 | struct acpi_device *acpi_dev = to_acpi_device(dev); | |
643 | ||
644 | return sprintf(buf, "%s\n", acpi_dev->pnp.unique_id); | |
645 | } | |
646 | static DEVICE_ATTR(uid, 0444, acpi_device_uid_show, NULL); | |
647 | ||
648 | static ssize_t acpi_device_adr_show(struct device *dev, | |
649 | struct device_attribute *attr, char *buf) | |
650 | { | |
651 | struct acpi_device *acpi_dev = to_acpi_device(dev); | |
652 | ||
653 | return sprintf(buf, "0x%08x\n", | |
654 | (unsigned int)(acpi_dev->pnp.bus_address)); | |
655 | } | |
656 | static DEVICE_ATTR(adr, 0444, acpi_device_adr_show, NULL); | |
657 | ||
e49bd2dd ZR |
658 | static ssize_t |
659 | acpi_device_path_show(struct device *dev, struct device_attribute *attr, char *buf) { | |
660 | struct acpi_device *acpi_dev = to_acpi_device(dev); | |
661 | struct acpi_buffer path = {ACPI_ALLOCATE_BUFFER, NULL}; | |
662 | int result; | |
1da177e4 | 663 | |
e49bd2dd | 664 | result = acpi_get_name(acpi_dev->handle, ACPI_FULL_PATHNAME, &path); |
0c526d96 | 665 | if (result) |
e49bd2dd | 666 | goto end; |
1da177e4 | 667 | |
e49bd2dd ZR |
668 | result = sprintf(buf, "%s\n", (char*)path.pointer); |
669 | kfree(path.pointer); | |
0c526d96 | 670 | end: |
e49bd2dd | 671 | return result; |
1da177e4 | 672 | } |
e49bd2dd | 673 | static DEVICE_ATTR(path, 0444, acpi_device_path_show, NULL); |
1da177e4 | 674 | |
d1efe3c3 LO |
675 | /* sysfs file that shows description text from the ACPI _STR method */ |
676 | static ssize_t description_show(struct device *dev, | |
677 | struct device_attribute *attr, | |
678 | char *buf) { | |
679 | struct acpi_device *acpi_dev = to_acpi_device(dev); | |
680 | int result; | |
681 | ||
682 | if (acpi_dev->pnp.str_obj == NULL) | |
683 | return 0; | |
684 | ||
685 | /* | |
686 | * The _STR object contains a Unicode identifier for a device. | |
687 | * We need to convert to utf-8 so it can be displayed. | |
688 | */ | |
689 | result = utf16s_to_utf8s( | |
690 | (wchar_t *)acpi_dev->pnp.str_obj->buffer.pointer, | |
691 | acpi_dev->pnp.str_obj->buffer.length, | |
692 | UTF16_LITTLE_ENDIAN, buf, | |
693 | PAGE_SIZE); | |
694 | ||
695 | buf[result++] = '\n'; | |
696 | ||
697 | return result; | |
698 | } | |
699 | static DEVICE_ATTR(description, 0444, description_show, NULL); | |
700 | ||
bb74ac23 YI |
701 | static ssize_t |
702 | acpi_device_sun_show(struct device *dev, struct device_attribute *attr, | |
703 | char *buf) { | |
704 | struct acpi_device *acpi_dev = to_acpi_device(dev); | |
a383b68d YI |
705 | acpi_status status; |
706 | unsigned long long sun; | |
bb74ac23 | 707 | |
a383b68d YI |
708 | status = acpi_evaluate_integer(acpi_dev->handle, "_SUN", NULL, &sun); |
709 | if (ACPI_FAILURE(status)) | |
710 | return -ENODEV; | |
711 | ||
712 | return sprintf(buf, "%llu\n", sun); | |
bb74ac23 YI |
713 | } |
714 | static DEVICE_ATTR(sun, 0444, acpi_device_sun_show, NULL); | |
715 | ||
c713cd7f SP |
716 | static ssize_t status_show(struct device *dev, struct device_attribute *attr, |
717 | char *buf) { | |
718 | struct acpi_device *acpi_dev = to_acpi_device(dev); | |
719 | acpi_status status; | |
720 | unsigned long long sta; | |
721 | ||
722 | status = acpi_evaluate_integer(acpi_dev->handle, "_STA", NULL, &sta); | |
723 | if (ACPI_FAILURE(status)) | |
724 | return -ENODEV; | |
725 | ||
726 | return sprintf(buf, "%llu\n", sta); | |
727 | } | |
728 | static DEVICE_ATTR_RO(status); | |
729 | ||
e49bd2dd | 730 | static int acpi_device_setup_files(struct acpi_device *dev) |
1da177e4 | 731 | { |
d1efe3c3 | 732 | struct acpi_buffer buffer = {ACPI_ALLOCATE_BUFFER, NULL}; |
f883d9db | 733 | acpi_status status; |
e49bd2dd | 734 | int result = 0; |
1da177e4 LT |
735 | |
736 | /* | |
e49bd2dd | 737 | * Devices gotten from FADT don't have a "path" attribute |
1da177e4 | 738 | */ |
0c526d96 | 739 | if (dev->handle) { |
e49bd2dd | 740 | result = device_create_file(&dev->dev, &dev_attr_path); |
0c526d96 | 741 | if (result) |
e49bd2dd | 742 | goto end; |
1da177e4 LT |
743 | } |
744 | ||
2b2ae7c7 TR |
745 | if (!list_empty(&dev->pnp.ids)) { |
746 | result = device_create_file(&dev->dev, &dev_attr_hid); | |
747 | if (result) | |
748 | goto end; | |
1da177e4 | 749 | |
2b2ae7c7 TR |
750 | result = device_create_file(&dev->dev, &dev_attr_modalias); |
751 | if (result) | |
752 | goto end; | |
753 | } | |
29b71a1c | 754 | |
d1efe3c3 LO |
755 | /* |
756 | * If device has _STR, 'description' file is created | |
757 | */ | |
952c63e9 | 758 | if (acpi_has_method(dev->handle, "_STR")) { |
d1efe3c3 LO |
759 | status = acpi_evaluate_object(dev->handle, "_STR", |
760 | NULL, &buffer); | |
761 | if (ACPI_FAILURE(status)) | |
762 | buffer.pointer = NULL; | |
763 | dev->pnp.str_obj = buffer.pointer; | |
764 | result = device_create_file(&dev->dev, &dev_attr_description); | |
765 | if (result) | |
766 | goto end; | |
767 | } | |
768 | ||
d4e1a692 | 769 | if (dev->pnp.type.bus_address) |
923d4a45 LZ |
770 | result = device_create_file(&dev->dev, &dev_attr_adr); |
771 | if (dev->pnp.unique_id) | |
772 | result = device_create_file(&dev->dev, &dev_attr_uid); | |
773 | ||
a383b68d | 774 | if (acpi_has_method(dev->handle, "_SUN")) { |
bb74ac23 YI |
775 | result = device_create_file(&dev->dev, &dev_attr_sun); |
776 | if (result) | |
777 | goto end; | |
bb74ac23 YI |
778 | } |
779 | ||
c713cd7f SP |
780 | if (acpi_has_method(dev->handle, "_STA")) { |
781 | result = device_create_file(&dev->dev, &dev_attr_status); | |
782 | if (result) | |
783 | goto end; | |
784 | } | |
785 | ||
e49bd2dd ZR |
786 | /* |
787 | * If device has _EJ0, 'eject' file is created that is used to trigger | |
788 | * hot-removal function from userland. | |
789 | */ | |
952c63e9 | 790 | if (acpi_has_method(dev->handle, "_EJ0")) { |
e49bd2dd | 791 | result = device_create_file(&dev->dev, &dev_attr_eject); |
836aedb1 RW |
792 | if (result) |
793 | return result; | |
794 | } | |
795 | ||
796 | if (dev->flags.power_manageable) { | |
797 | result = device_create_file(&dev->dev, &dev_attr_power_state); | |
798 | if (result) | |
799 | return result; | |
800 | ||
801 | if (dev->power.flags.power_resources) | |
802 | result = device_create_file(&dev->dev, | |
803 | &dev_attr_real_power_state); | |
804 | } | |
805 | ||
0c526d96 | 806 | end: |
e49bd2dd | 807 | return result; |
1da177e4 LT |
808 | } |
809 | ||
f883d9db | 810 | static void acpi_device_remove_files(struct acpi_device *dev) |
1da177e4 | 811 | { |
836aedb1 RW |
812 | if (dev->flags.power_manageable) { |
813 | device_remove_file(&dev->dev, &dev_attr_power_state); | |
814 | if (dev->power.flags.power_resources) | |
815 | device_remove_file(&dev->dev, | |
816 | &dev_attr_real_power_state); | |
817 | } | |
818 | ||
f883d9db | 819 | /* |
d1efe3c3 LO |
820 | * If device has _STR, remove 'description' file |
821 | */ | |
952c63e9 | 822 | if (acpi_has_method(dev->handle, "_STR")) { |
d1efe3c3 LO |
823 | kfree(dev->pnp.str_obj); |
824 | device_remove_file(&dev->dev, &dev_attr_description); | |
825 | } | |
826 | /* | |
827 | * If device has _EJ0, remove 'eject' file. | |
f883d9db | 828 | */ |
952c63e9 | 829 | if (acpi_has_method(dev->handle, "_EJ0")) |
f883d9db | 830 | device_remove_file(&dev->dev, &dev_attr_eject); |
1da177e4 | 831 | |
952c63e9 | 832 | if (acpi_has_method(dev->handle, "_SUN")) |
bb74ac23 YI |
833 | device_remove_file(&dev->dev, &dev_attr_sun); |
834 | ||
923d4a45 LZ |
835 | if (dev->pnp.unique_id) |
836 | device_remove_file(&dev->dev, &dev_attr_uid); | |
d4e1a692 | 837 | if (dev->pnp.type.bus_address) |
923d4a45 | 838 | device_remove_file(&dev->dev, &dev_attr_adr); |
1131b938 BH |
839 | device_remove_file(&dev->dev, &dev_attr_modalias); |
840 | device_remove_file(&dev->dev, &dev_attr_hid); | |
c713cd7f SP |
841 | if (acpi_has_method(dev->handle, "_STA")) |
842 | device_remove_file(&dev->dev, &dev_attr_status); | |
0c526d96 | 843 | if (dev->handle) |
e49bd2dd | 844 | device_remove_file(&dev->dev, &dev_attr_path); |
1da177e4 | 845 | } |
1da177e4 | 846 | /* -------------------------------------------------------------------------- |
9e89dde2 | 847 | ACPI Bus operations |
1da177e4 | 848 | -------------------------------------------------------------------------- */ |
29b71a1c | 849 | |
cf761af9 MW |
850 | static const struct acpi_device_id *__acpi_match_device( |
851 | struct acpi_device *device, const struct acpi_device_id *ids) | |
29b71a1c TR |
852 | { |
853 | const struct acpi_device_id *id; | |
7f47fa6c | 854 | struct acpi_hardware_id *hwid; |
29b71a1c | 855 | |
39a0ad87 ZY |
856 | /* |
857 | * If the device is not present, it is unnecessary to load device | |
858 | * driver for it. | |
859 | */ | |
860 | if (!device->status.present) | |
cf761af9 | 861 | return NULL; |
39a0ad87 | 862 | |
7f47fa6c BH |
863 | for (id = ids; id->id[0]; id++) |
864 | list_for_each_entry(hwid, &device->pnp.ids, list) | |
865 | if (!strcmp((char *) id->id, hwid->id)) | |
cf761af9 MW |
866 | return id; |
867 | ||
868 | return NULL; | |
869 | } | |
870 | ||
871 | /** | |
872 | * acpi_match_device - Match a struct device against a given list of ACPI IDs | |
873 | * @ids: Array of struct acpi_device_id object to match against. | |
874 | * @dev: The device structure to match. | |
875 | * | |
876 | * Check if @dev has a valid ACPI handle and if there is a struct acpi_device | |
877 | * object for that handle and use that object to match against a given list of | |
878 | * device IDs. | |
879 | * | |
880 | * Return a pointer to the first matching ID on success or %NULL on failure. | |
881 | */ | |
882 | const struct acpi_device_id *acpi_match_device(const struct acpi_device_id *ids, | |
883 | const struct device *dev) | |
884 | { | |
885 | struct acpi_device *adev; | |
0613e1f7 | 886 | acpi_handle handle = ACPI_HANDLE(dev); |
cf761af9 | 887 | |
0613e1f7 | 888 | if (!ids || !handle || acpi_bus_get_device(handle, &adev)) |
cf761af9 MW |
889 | return NULL; |
890 | ||
52870786 MW |
891 | if (!acpi_companion_match(dev)) |
892 | return NULL; | |
893 | ||
cf761af9 MW |
894 | return __acpi_match_device(adev, ids); |
895 | } | |
896 | EXPORT_SYMBOL_GPL(acpi_match_device); | |
29b71a1c | 897 | |
cf761af9 MW |
898 | int acpi_match_device_ids(struct acpi_device *device, |
899 | const struct acpi_device_id *ids) | |
900 | { | |
901 | return __acpi_match_device(device, ids) ? 0 : -ENOENT; | |
29b71a1c TR |
902 | } |
903 | EXPORT_SYMBOL(acpi_match_device_ids); | |
904 | ||
0b224527 RW |
905 | static void acpi_free_power_resources_lists(struct acpi_device *device) |
906 | { | |
907 | int i; | |
908 | ||
993cbe59 RW |
909 | if (device->wakeup.flags.valid) |
910 | acpi_power_resources_list_free(&device->wakeup.resources); | |
911 | ||
0b224527 RW |
912 | if (!device->flags.power_manageable) |
913 | return; | |
914 | ||
915 | for (i = ACPI_STATE_D0; i <= ACPI_STATE_D3_HOT; i++) { | |
916 | struct acpi_device_power_state *ps = &device->power.states[i]; | |
917 | acpi_power_resources_list_free(&ps->resources); | |
918 | } | |
7f47fa6c BH |
919 | } |
920 | ||
1890a97a | 921 | static void acpi_device_release(struct device *dev) |
1da177e4 | 922 | { |
1890a97a | 923 | struct acpi_device *acpi_dev = to_acpi_device(dev); |
1da177e4 | 924 | |
c0af4175 | 925 | acpi_free_pnp_ids(&acpi_dev->pnp); |
0b224527 | 926 | acpi_free_power_resources_lists(acpi_dev); |
1890a97a | 927 | kfree(acpi_dev); |
1da177e4 LT |
928 | } |
929 | ||
5d9464a4 | 930 | static int acpi_bus_match(struct device *dev, struct device_driver *drv) |
9e89dde2 | 931 | { |
5d9464a4 PM |
932 | struct acpi_device *acpi_dev = to_acpi_device(dev); |
933 | struct acpi_driver *acpi_drv = to_acpi_driver(drv); | |
1da177e4 | 934 | |
209d3b17 | 935 | return acpi_dev->flags.match_driver |
805d410f | 936 | && !acpi_match_device_ids(acpi_dev, acpi_drv->ids); |
5d9464a4 | 937 | } |
1da177e4 | 938 | |
7eff2e7a | 939 | static int acpi_device_uevent(struct device *dev, struct kobj_uevent_env *env) |
1da177e4 | 940 | { |
5d9464a4 | 941 | struct acpi_device *acpi_dev = to_acpi_device(dev); |
7eff2e7a | 942 | int len; |
5d9464a4 | 943 | |
2b2ae7c7 TR |
944 | if (list_empty(&acpi_dev->pnp.ids)) |
945 | return 0; | |
946 | ||
7eff2e7a KS |
947 | if (add_uevent_var(env, "MODALIAS=")) |
948 | return -ENOMEM; | |
949 | len = create_modalias(acpi_dev, &env->buf[env->buflen - 1], | |
950 | sizeof(env->buf) - env->buflen); | |
3d8e0090 ZR |
951 | if (len <= 0) |
952 | return len; | |
7eff2e7a | 953 | env->buflen += len; |
9e89dde2 | 954 | return 0; |
1da177e4 LT |
955 | } |
956 | ||
46ec8598 BH |
957 | static void acpi_device_notify(acpi_handle handle, u32 event, void *data) |
958 | { | |
959 | struct acpi_device *device = data; | |
960 | ||
961 | device->driver->ops.notify(device, event); | |
962 | } | |
963 | ||
236105db | 964 | static void acpi_device_notify_fixed(void *data) |
46ec8598 BH |
965 | { |
966 | struct acpi_device *device = data; | |
967 | ||
53de5356 BH |
968 | /* Fixed hardware devices have no handles */ |
969 | acpi_device_notify(NULL, ACPI_FIXED_HARDWARE_EVENT, device); | |
236105db LT |
970 | } |
971 | ||
972 | static acpi_status acpi_device_fixed_event(void *data) | |
973 | { | |
974 | acpi_os_execute(OSL_NOTIFY_HANDLER, acpi_device_notify_fixed, data); | |
46ec8598 BH |
975 | return AE_OK; |
976 | } | |
977 | ||
978 | static int acpi_device_install_notify_handler(struct acpi_device *device) | |
979 | { | |
980 | acpi_status status; | |
46ec8598 | 981 | |
ccba2a36 | 982 | if (device->device_type == ACPI_BUS_TYPE_POWER_BUTTON) |
46ec8598 BH |
983 | status = |
984 | acpi_install_fixed_event_handler(ACPI_EVENT_POWER_BUTTON, | |
236105db | 985 | acpi_device_fixed_event, |
46ec8598 | 986 | device); |
ccba2a36 | 987 | else if (device->device_type == ACPI_BUS_TYPE_SLEEP_BUTTON) |
46ec8598 BH |
988 | status = |
989 | acpi_install_fixed_event_handler(ACPI_EVENT_SLEEP_BUTTON, | |
236105db | 990 | acpi_device_fixed_event, |
46ec8598 BH |
991 | device); |
992 | else | |
993 | status = acpi_install_notify_handler(device->handle, | |
994 | ACPI_DEVICE_NOTIFY, | |
995 | acpi_device_notify, | |
996 | device); | |
997 | ||
998 | if (ACPI_FAILURE(status)) | |
999 | return -EINVAL; | |
1000 | return 0; | |
1001 | } | |
1002 | ||
1003 | static void acpi_device_remove_notify_handler(struct acpi_device *device) | |
1004 | { | |
ccba2a36 | 1005 | if (device->device_type == ACPI_BUS_TYPE_POWER_BUTTON) |
46ec8598 | 1006 | acpi_remove_fixed_event_handler(ACPI_EVENT_POWER_BUTTON, |
236105db | 1007 | acpi_device_fixed_event); |
ccba2a36 | 1008 | else if (device->device_type == ACPI_BUS_TYPE_SLEEP_BUTTON) |
46ec8598 | 1009 | acpi_remove_fixed_event_handler(ACPI_EVENT_SLEEP_BUTTON, |
236105db | 1010 | acpi_device_fixed_event); |
46ec8598 BH |
1011 | else |
1012 | acpi_remove_notify_handler(device->handle, ACPI_DEVICE_NOTIFY, | |
1013 | acpi_device_notify); | |
1014 | } | |
1015 | ||
d9e455f5 | 1016 | static int acpi_device_probe(struct device *dev) |
1da177e4 | 1017 | { |
5d9464a4 PM |
1018 | struct acpi_device *acpi_dev = to_acpi_device(dev); |
1019 | struct acpi_driver *acpi_drv = to_acpi_driver(dev->driver); | |
1020 | int ret; | |
1021 | ||
fc2e0a83 | 1022 | if (acpi_dev->handler && !acpi_is_pnp_device(acpi_dev)) |
24071f47 RW |
1023 | return -EINVAL; |
1024 | ||
d9e455f5 RW |
1025 | if (!acpi_drv->ops.add) |
1026 | return -ENOSYS; | |
46ec8598 | 1027 | |
d9e455f5 RW |
1028 | ret = acpi_drv->ops.add(acpi_dev); |
1029 | if (ret) | |
1030 | return ret; | |
46ec8598 | 1031 | |
d9e455f5 RW |
1032 | acpi_dev->driver = acpi_drv; |
1033 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, | |
1034 | "Driver [%s] successfully bound to device [%s]\n", | |
1035 | acpi_drv->name, acpi_dev->pnp.bus_id)); | |
1036 | ||
1037 | if (acpi_drv->ops.notify) { | |
1038 | ret = acpi_device_install_notify_handler(acpi_dev); | |
1039 | if (ret) { | |
1040 | if (acpi_drv->ops.remove) | |
1041 | acpi_drv->ops.remove(acpi_dev); | |
1042 | ||
1043 | acpi_dev->driver = NULL; | |
1044 | acpi_dev->driver_data = NULL; | |
1045 | return ret; | |
1046 | } | |
5d9464a4 | 1047 | } |
d9e455f5 RW |
1048 | |
1049 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Found driver [%s] for device [%s]\n", | |
1050 | acpi_drv->name, acpi_dev->pnp.bus_id)); | |
1051 | get_device(dev); | |
1052 | return 0; | |
5d9464a4 | 1053 | } |
1da177e4 | 1054 | |
5d9464a4 PM |
1055 | static int acpi_device_remove(struct device * dev) |
1056 | { | |
1057 | struct acpi_device *acpi_dev = to_acpi_device(dev); | |
1058 | struct acpi_driver *acpi_drv = acpi_dev->driver; | |
1059 | ||
1060 | if (acpi_drv) { | |
46ec8598 BH |
1061 | if (acpi_drv->ops.notify) |
1062 | acpi_device_remove_notify_handler(acpi_dev); | |
5d9464a4 | 1063 | if (acpi_drv->ops.remove) |
51fac838 | 1064 | acpi_drv->ops.remove(acpi_dev); |
1da177e4 | 1065 | } |
5d9464a4 | 1066 | acpi_dev->driver = NULL; |
db89b4f0 | 1067 | acpi_dev->driver_data = NULL; |
1da177e4 | 1068 | |
5d9464a4 | 1069 | put_device(dev); |
9e89dde2 ZR |
1070 | return 0; |
1071 | } | |
1da177e4 | 1072 | |
55955aad | 1073 | struct bus_type acpi_bus_type = { |
9e89dde2 | 1074 | .name = "acpi", |
5d9464a4 PM |
1075 | .match = acpi_bus_match, |
1076 | .probe = acpi_device_probe, | |
1077 | .remove = acpi_device_remove, | |
1078 | .uevent = acpi_device_uevent, | |
9e89dde2 ZR |
1079 | }; |
1080 | ||
d783156e RW |
1081 | static void acpi_device_del(struct acpi_device *device) |
1082 | { | |
1083 | mutex_lock(&acpi_device_lock); | |
1084 | if (device->parent) | |
1085 | list_del(&device->node); | |
1086 | ||
1087 | list_del(&device->wakeup_list); | |
1088 | mutex_unlock(&acpi_device_lock); | |
1089 | ||
1090 | acpi_power_add_remove_device(device, false); | |
1091 | acpi_device_remove_files(device); | |
1092 | if (device->remove) | |
1093 | device->remove(device); | |
1094 | ||
1095 | device_del(&device->dev); | |
1096 | } | |
1097 | ||
1098 | static LIST_HEAD(acpi_device_del_list); | |
1099 | static DEFINE_MUTEX(acpi_device_del_lock); | |
1100 | ||
1101 | static void acpi_device_del_work_fn(struct work_struct *work_not_used) | |
1102 | { | |
1103 | for (;;) { | |
1104 | struct acpi_device *adev; | |
1105 | ||
1106 | mutex_lock(&acpi_device_del_lock); | |
1107 | ||
1108 | if (list_empty(&acpi_device_del_list)) { | |
1109 | mutex_unlock(&acpi_device_del_lock); | |
1110 | break; | |
1111 | } | |
1112 | adev = list_first_entry(&acpi_device_del_list, | |
1113 | struct acpi_device, del_list); | |
1114 | list_del(&adev->del_list); | |
1115 | ||
1116 | mutex_unlock(&acpi_device_del_lock); | |
1117 | ||
1118 | acpi_device_del(adev); | |
1119 | /* | |
1120 | * Drop references to all power resources that might have been | |
1121 | * used by the device. | |
1122 | */ | |
1123 | acpi_power_transition(adev, ACPI_STATE_D3_COLD); | |
1124 | put_device(&adev->dev); | |
1125 | } | |
1126 | } | |
1127 | ||
1128 | /** | |
1129 | * acpi_scan_drop_device - Drop an ACPI device object. | |
1130 | * @handle: Handle of an ACPI namespace node, not used. | |
1131 | * @context: Address of the ACPI device object to drop. | |
1132 | * | |
1133 | * This is invoked by acpi_ns_delete_node() during the removal of the ACPI | |
1134 | * namespace node the device object pointed to by @context is attached to. | |
1135 | * | |
1136 | * The unregistration is carried out asynchronously to avoid running | |
1137 | * acpi_device_del() under the ACPICA's namespace mutex and the list is used to | |
1138 | * ensure the correct ordering (the device objects must be unregistered in the | |
1139 | * same order in which the corresponding namespace nodes are deleted). | |
1140 | */ | |
1141 | static void acpi_scan_drop_device(acpi_handle handle, void *context) | |
caf5c03f | 1142 | { |
d783156e RW |
1143 | static DECLARE_WORK(work, acpi_device_del_work_fn); |
1144 | struct acpi_device *adev = context; | |
1145 | ||
1146 | mutex_lock(&acpi_device_del_lock); | |
1147 | ||
1148 | /* | |
1149 | * Use the ACPI hotplug workqueue which is ordered, so this work item | |
1150 | * won't run after any hotplug work items submitted subsequently. That | |
1151 | * prevents attempts to register device objects identical to those being | |
1152 | * deleted from happening concurrently (such attempts result from | |
1153 | * hotplug events handled via the ACPI hotplug workqueue). It also will | |
1154 | * run after all of the work items submitted previosuly, which helps | |
1155 | * those work items to ensure that they are not accessing stale device | |
1156 | * objects. | |
1157 | */ | |
1158 | if (list_empty(&acpi_device_del_list)) | |
1159 | acpi_queue_hotplug_work(&work); | |
1160 | ||
1161 | list_add_tail(&adev->del_list, &acpi_device_del_list); | |
1162 | /* Make acpi_ns_validate_handle() return NULL for this handle. */ | |
1163 | adev->handle = INVALID_ACPI_HANDLE; | |
1164 | ||
1165 | mutex_unlock(&acpi_device_del_lock); | |
caf5c03f RW |
1166 | } |
1167 | ||
78ea4639 RW |
1168 | static int acpi_get_device_data(acpi_handle handle, struct acpi_device **device, |
1169 | void (*callback)(void *)) | |
caf5c03f RW |
1170 | { |
1171 | acpi_status status; | |
1172 | ||
1173 | if (!device) | |
1174 | return -EINVAL; | |
1175 | ||
78ea4639 RW |
1176 | status = acpi_get_data_full(handle, acpi_scan_drop_device, |
1177 | (void **)device, callback); | |
caf5c03f RW |
1178 | if (ACPI_FAILURE(status) || !*device) { |
1179 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "No context for object [%p]\n", | |
1180 | handle)); | |
1181 | return -ENODEV; | |
1182 | } | |
1183 | return 0; | |
1184 | } | |
78ea4639 RW |
1185 | |
1186 | int acpi_bus_get_device(acpi_handle handle, struct acpi_device **device) | |
1187 | { | |
1188 | return acpi_get_device_data(handle, device, NULL); | |
1189 | } | |
6585925b | 1190 | EXPORT_SYMBOL(acpi_bus_get_device); |
caf5c03f | 1191 | |
78ea4639 RW |
1192 | static void get_acpi_device(void *dev) |
1193 | { | |
1194 | if (dev) | |
1195 | get_device(&((struct acpi_device *)dev)->dev); | |
1196 | } | |
1197 | ||
1198 | struct acpi_device *acpi_bus_get_acpi_device(acpi_handle handle) | |
1199 | { | |
1200 | struct acpi_device *adev = NULL; | |
1201 | ||
1202 | acpi_get_device_data(handle, &adev, get_acpi_device); | |
1203 | return adev; | |
1204 | } | |
1205 | ||
1206 | void acpi_bus_put_acpi_device(struct acpi_device *adev) | |
1207 | { | |
1208 | put_device(&adev->dev); | |
1209 | } | |
1210 | ||
cf860be6 RW |
1211 | int acpi_device_add(struct acpi_device *device, |
1212 | void (*release)(struct device *)) | |
1da177e4 | 1213 | { |
4be44fcd | 1214 | int result; |
e49bd2dd ZR |
1215 | struct acpi_device_bus_id *acpi_device_bus_id, *new_bus_id; |
1216 | int found = 0; | |
66b7ed40 | 1217 | |
d43e167d RW |
1218 | if (device->handle) { |
1219 | acpi_status status; | |
1220 | ||
d783156e | 1221 | status = acpi_attach_data(device->handle, acpi_scan_drop_device, |
d43e167d RW |
1222 | device); |
1223 | if (ACPI_FAILURE(status)) { | |
1224 | acpi_handle_err(device->handle, | |
1225 | "Unable to attach device data\n"); | |
1226 | return -ENODEV; | |
1227 | } | |
1228 | } | |
1229 | ||
9e89dde2 ZR |
1230 | /* |
1231 | * Linkage | |
1232 | * ------- | |
1233 | * Link this device to its parent and siblings. | |
1234 | */ | |
1235 | INIT_LIST_HEAD(&device->children); | |
1236 | INIT_LIST_HEAD(&device->node); | |
9e89dde2 | 1237 | INIT_LIST_HEAD(&device->wakeup_list); |
1033f904 | 1238 | INIT_LIST_HEAD(&device->physical_node_list); |
d783156e | 1239 | INIT_LIST_HEAD(&device->del_list); |
1033f904 | 1240 | mutex_init(&device->physical_node_lock); |
1da177e4 | 1241 | |
e49bd2dd ZR |
1242 | new_bus_id = kzalloc(sizeof(struct acpi_device_bus_id), GFP_KERNEL); |
1243 | if (!new_bus_id) { | |
d43e167d RW |
1244 | pr_err(PREFIX "Memory allocation error\n"); |
1245 | result = -ENOMEM; | |
1246 | goto err_detach; | |
1da177e4 | 1247 | } |
e49bd2dd | 1248 | |
9090589d | 1249 | mutex_lock(&acpi_device_lock); |
e49bd2dd ZR |
1250 | /* |
1251 | * Find suitable bus_id and instance number in acpi_bus_id_list | |
1252 | * If failed, create one and link it into acpi_bus_id_list | |
1253 | */ | |
1254 | list_for_each_entry(acpi_device_bus_id, &acpi_bus_id_list, node) { | |
1131b938 BH |
1255 | if (!strcmp(acpi_device_bus_id->bus_id, |
1256 | acpi_device_hid(device))) { | |
1257 | acpi_device_bus_id->instance_no++; | |
e49bd2dd ZR |
1258 | found = 1; |
1259 | kfree(new_bus_id); | |
1260 | break; | |
1261 | } | |
1da177e4 | 1262 | } |
0c526d96 | 1263 | if (!found) { |
e49bd2dd | 1264 | acpi_device_bus_id = new_bus_id; |
1131b938 | 1265 | strcpy(acpi_device_bus_id->bus_id, acpi_device_hid(device)); |
e49bd2dd ZR |
1266 | acpi_device_bus_id->instance_no = 0; |
1267 | list_add_tail(&acpi_device_bus_id->node, &acpi_bus_id_list); | |
1da177e4 | 1268 | } |
0794469d | 1269 | dev_set_name(&device->dev, "%s:%02x", acpi_device_bus_id->bus_id, acpi_device_bus_id->instance_no); |
1da177e4 | 1270 | |
33b57150 | 1271 | if (device->parent) |
9e89dde2 | 1272 | list_add_tail(&device->node, &device->parent->children); |
33b57150 | 1273 | |
9e89dde2 ZR |
1274 | if (device->wakeup.flags.valid) |
1275 | list_add_tail(&device->wakeup_list, &acpi_wakeup_device_list); | |
9090589d | 1276 | mutex_unlock(&acpi_device_lock); |
1da177e4 | 1277 | |
1890a97a | 1278 | if (device->parent) |
66b7ed40 | 1279 | device->dev.parent = &device->parent->dev; |
1890a97a | 1280 | device->dev.bus = &acpi_bus_type; |
82c7d5ef | 1281 | device->dev.release = release; |
cf860be6 | 1282 | result = device_add(&device->dev); |
0c526d96 | 1283 | if (result) { |
8b12b922 | 1284 | dev_err(&device->dev, "Error registering device\n"); |
d43e167d | 1285 | goto err; |
1da177e4 | 1286 | } |
1da177e4 | 1287 | |
e49bd2dd | 1288 | result = acpi_device_setup_files(device); |
0c526d96 | 1289 | if (result) |
0794469d KS |
1290 | printk(KERN_ERR PREFIX "Error creating sysfs interface for device %s\n", |
1291 | dev_name(&device->dev)); | |
1da177e4 | 1292 | |
1da177e4 | 1293 | return 0; |
d43e167d RW |
1294 | |
1295 | err: | |
9090589d | 1296 | mutex_lock(&acpi_device_lock); |
33b57150 | 1297 | if (device->parent) |
e49bd2dd | 1298 | list_del(&device->node); |
e49bd2dd | 1299 | list_del(&device->wakeup_list); |
9090589d | 1300 | mutex_unlock(&acpi_device_lock); |
d43e167d RW |
1301 | |
1302 | err_detach: | |
d783156e | 1303 | acpi_detach_data(device->handle, acpi_scan_drop_device); |
e49bd2dd | 1304 | return result; |
1da177e4 LT |
1305 | } |
1306 | ||
9e89dde2 ZR |
1307 | /* -------------------------------------------------------------------------- |
1308 | Driver Management | |
1309 | -------------------------------------------------------------------------- */ | |
9e89dde2 ZR |
1310 | /** |
1311 | * acpi_bus_register_driver - register a driver with the ACPI bus | |
1312 | * @driver: driver being registered | |
1313 | * | |
1314 | * Registers a driver with the ACPI bus. Searches the namespace for all | |
1315 | * devices that match the driver's criteria and binds. Returns zero for | |
1316 | * success or a negative error status for failure. | |
1317 | */ | |
1318 | int acpi_bus_register_driver(struct acpi_driver *driver) | |
1da177e4 | 1319 | { |
1890a97a | 1320 | int ret; |
1da177e4 | 1321 | |
9e89dde2 ZR |
1322 | if (acpi_disabled) |
1323 | return -ENODEV; | |
1890a97a PM |
1324 | driver->drv.name = driver->name; |
1325 | driver->drv.bus = &acpi_bus_type; | |
1326 | driver->drv.owner = driver->owner; | |
1da177e4 | 1327 | |
1890a97a PM |
1328 | ret = driver_register(&driver->drv); |
1329 | return ret; | |
9e89dde2 | 1330 | } |
1da177e4 | 1331 | |
9e89dde2 ZR |
1332 | EXPORT_SYMBOL(acpi_bus_register_driver); |
1333 | ||
1334 | /** | |
b27b14ce | 1335 | * acpi_bus_unregister_driver - unregisters a driver with the ACPI bus |
9e89dde2 ZR |
1336 | * @driver: driver to unregister |
1337 | * | |
1338 | * Unregisters a driver with the ACPI bus. Searches the namespace for all | |
1339 | * devices that match the driver's criteria and unbinds. | |
1340 | */ | |
1341 | void acpi_bus_unregister_driver(struct acpi_driver *driver) | |
1342 | { | |
1890a97a | 1343 | driver_unregister(&driver->drv); |
9e89dde2 ZR |
1344 | } |
1345 | ||
1346 | EXPORT_SYMBOL(acpi_bus_unregister_driver); | |
1347 | ||
9e89dde2 ZR |
1348 | /* -------------------------------------------------------------------------- |
1349 | Device Enumeration | |
1350 | -------------------------------------------------------------------------- */ | |
5c478f49 BH |
1351 | static struct acpi_device *acpi_bus_get_parent(acpi_handle handle) |
1352 | { | |
456de893 | 1353 | struct acpi_device *device = NULL; |
5c478f49 | 1354 | acpi_status status; |
5c478f49 BH |
1355 | |
1356 | /* | |
1357 | * Fixed hardware devices do not appear in the namespace and do not | |
1358 | * have handles, but we fabricate acpi_devices for them, so we have | |
1359 | * to deal with them specially. | |
1360 | */ | |
456de893 | 1361 | if (!handle) |
5c478f49 BH |
1362 | return acpi_root; |
1363 | ||
1364 | do { | |
1365 | status = acpi_get_parent(handle, &handle); | |
5c478f49 | 1366 | if (ACPI_FAILURE(status)) |
456de893 RW |
1367 | return status == AE_NULL_ENTRY ? NULL : acpi_root; |
1368 | } while (acpi_bus_get_device(handle, &device)); | |
1369 | return device; | |
5c478f49 BH |
1370 | } |
1371 | ||
9e89dde2 ZR |
1372 | acpi_status |
1373 | acpi_bus_get_ejd(acpi_handle handle, acpi_handle *ejd) | |
1374 | { | |
1375 | acpi_status status; | |
1376 | acpi_handle tmp; | |
1377 | struct acpi_buffer buffer = {ACPI_ALLOCATE_BUFFER, NULL}; | |
1378 | union acpi_object *obj; | |
1379 | ||
1380 | status = acpi_get_handle(handle, "_EJD", &tmp); | |
1381 | if (ACPI_FAILURE(status)) | |
1382 | return status; | |
1383 | ||
1384 | status = acpi_evaluate_object(handle, "_EJD", NULL, &buffer); | |
1385 | if (ACPI_SUCCESS(status)) { | |
1386 | obj = buffer.pointer; | |
3b5fee59 HM |
1387 | status = acpi_get_handle(ACPI_ROOT_OBJECT, obj->string.pointer, |
1388 | ejd); | |
9e89dde2 ZR |
1389 | kfree(buffer.pointer); |
1390 | } | |
1391 | return status; | |
1392 | } | |
1393 | EXPORT_SYMBOL_GPL(acpi_bus_get_ejd); | |
1394 | ||
e88c9c60 RW |
1395 | static int acpi_bus_extract_wakeup_device_power_package(acpi_handle handle, |
1396 | struct acpi_device_wakeup *wakeup) | |
9e89dde2 | 1397 | { |
b581a7f9 RW |
1398 | struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; |
1399 | union acpi_object *package = NULL; | |
9e89dde2 | 1400 | union acpi_object *element = NULL; |
b581a7f9 | 1401 | acpi_status status; |
e88c9c60 | 1402 | int err = -ENODATA; |
9e89dde2 | 1403 | |
b581a7f9 | 1404 | if (!wakeup) |
e88c9c60 | 1405 | return -EINVAL; |
9e89dde2 | 1406 | |
993cbe59 | 1407 | INIT_LIST_HEAD(&wakeup->resources); |
9e89dde2 | 1408 | |
b581a7f9 RW |
1409 | /* _PRW */ |
1410 | status = acpi_evaluate_object(handle, "_PRW", NULL, &buffer); | |
1411 | if (ACPI_FAILURE(status)) { | |
1412 | ACPI_EXCEPTION((AE_INFO, status, "Evaluating _PRW")); | |
e88c9c60 | 1413 | return err; |
b581a7f9 RW |
1414 | } |
1415 | ||
1416 | package = (union acpi_object *)buffer.pointer; | |
1417 | ||
e88c9c60 | 1418 | if (!package || package->package.count < 2) |
b581a7f9 | 1419 | goto out; |
b581a7f9 | 1420 | |
9e89dde2 | 1421 | element = &(package->package.elements[0]); |
e88c9c60 | 1422 | if (!element) |
b581a7f9 | 1423 | goto out; |
e88c9c60 | 1424 | |
9e89dde2 ZR |
1425 | if (element->type == ACPI_TYPE_PACKAGE) { |
1426 | if ((element->package.count < 2) || | |
1427 | (element->package.elements[0].type != | |
1428 | ACPI_TYPE_LOCAL_REFERENCE) | |
e88c9c60 | 1429 | || (element->package.elements[1].type != ACPI_TYPE_INTEGER)) |
b581a7f9 | 1430 | goto out; |
e88c9c60 | 1431 | |
b581a7f9 | 1432 | wakeup->gpe_device = |
9e89dde2 | 1433 | element->package.elements[0].reference.handle; |
b581a7f9 | 1434 | wakeup->gpe_number = |
9e89dde2 ZR |
1435 | (u32) element->package.elements[1].integer.value; |
1436 | } else if (element->type == ACPI_TYPE_INTEGER) { | |
b581a7f9 RW |
1437 | wakeup->gpe_device = NULL; |
1438 | wakeup->gpe_number = element->integer.value; | |
1439 | } else { | |
b581a7f9 RW |
1440 | goto out; |
1441 | } | |
9e89dde2 ZR |
1442 | |
1443 | element = &(package->package.elements[1]); | |
e88c9c60 | 1444 | if (element->type != ACPI_TYPE_INTEGER) |
b581a7f9 | 1445 | goto out; |
e88c9c60 | 1446 | |
b581a7f9 | 1447 | wakeup->sleep_state = element->integer.value; |
9e89dde2 | 1448 | |
e88c9c60 RW |
1449 | err = acpi_extract_power_resources(package, 2, &wakeup->resources); |
1450 | if (err) | |
b581a7f9 | 1451 | goto out; |
9e89dde2 | 1452 | |
0596a52b RW |
1453 | if (!list_empty(&wakeup->resources)) { |
1454 | int sleep_state; | |
9e89dde2 | 1455 | |
b5d667eb RW |
1456 | err = acpi_power_wakeup_list_init(&wakeup->resources, |
1457 | &sleep_state); | |
1458 | if (err) { | |
1459 | acpi_handle_warn(handle, "Retrieving current states " | |
1460 | "of wakeup power resources failed\n"); | |
1461 | acpi_power_resources_list_free(&wakeup->resources); | |
1462 | goto out; | |
1463 | } | |
0596a52b RW |
1464 | if (sleep_state < wakeup->sleep_state) { |
1465 | acpi_handle_warn(handle, "Overriding _PRW sleep state " | |
1466 | "(S%d) by S%d from power resources\n", | |
1467 | (int)wakeup->sleep_state, sleep_state); | |
1468 | wakeup->sleep_state = sleep_state; | |
1469 | } | |
1470 | } | |
9874647b | 1471 | |
b581a7f9 RW |
1472 | out: |
1473 | kfree(buffer.pointer); | |
e88c9c60 | 1474 | return err; |
1da177e4 LT |
1475 | } |
1476 | ||
bd9b2f9a | 1477 | static void acpi_wakeup_gpe_init(struct acpi_device *device) |
1da177e4 | 1478 | { |
29b71a1c | 1479 | struct acpi_device_id button_device_ids[] = { |
29b71a1c | 1480 | {"PNP0C0C", 0}, |
b7e38304 | 1481 | {"PNP0C0D", 0}, |
29b71a1c TR |
1482 | {"PNP0C0E", 0}, |
1483 | {"", 0}, | |
1484 | }; | |
bd9b2f9a | 1485 | struct acpi_device_wakeup *wakeup = &device->wakeup; |
f517709d RW |
1486 | acpi_status status; |
1487 | acpi_event_status event_status; | |
1488 | ||
bd9b2f9a | 1489 | wakeup->flags.notifier_present = 0; |
f517709d RW |
1490 | |
1491 | /* Power button, Lid switch always enable wakeup */ | |
1492 | if (!acpi_match_device_ids(device, button_device_ids)) { | |
bd9b2f9a | 1493 | wakeup->flags.run_wake = 1; |
b7e38304 ZR |
1494 | if (!acpi_match_device_ids(device, &button_device_ids[1])) { |
1495 | /* Do not use Lid/sleep button for S5 wakeup */ | |
bd9b2f9a RW |
1496 | if (wakeup->sleep_state == ACPI_STATE_S5) |
1497 | wakeup->sleep_state = ACPI_STATE_S4; | |
b7e38304 | 1498 | } |
bd9b2f9a | 1499 | acpi_mark_gpe_for_wake(wakeup->gpe_device, wakeup->gpe_number); |
f2b56bc8 | 1500 | device_set_wakeup_capable(&device->dev, true); |
f517709d RW |
1501 | return; |
1502 | } | |
1503 | ||
bd9b2f9a RW |
1504 | acpi_setup_gpe_for_wake(device->handle, wakeup->gpe_device, |
1505 | wakeup->gpe_number); | |
1506 | status = acpi_get_gpe_status(wakeup->gpe_device, wakeup->gpe_number, | |
1507 | &event_status); | |
1508 | if (ACPI_FAILURE(status)) | |
1509 | return; | |
1510 | ||
2f857234 | 1511 | wakeup->flags.run_wake = !!(event_status & ACPI_EVENT_FLAG_HAS_HANDLER); |
f517709d RW |
1512 | } |
1513 | ||
d57d09a4 | 1514 | static void acpi_bus_get_wakeup_device_flags(struct acpi_device *device) |
f517709d | 1515 | { |
e88c9c60 | 1516 | int err; |
29b71a1c | 1517 | |
d57d09a4 | 1518 | /* Presence of _PRW indicates wake capable */ |
952c63e9 | 1519 | if (!acpi_has_method(device->handle, "_PRW")) |
d57d09a4 RW |
1520 | return; |
1521 | ||
e88c9c60 RW |
1522 | err = acpi_bus_extract_wakeup_device_power_package(device->handle, |
1523 | &device->wakeup); | |
1524 | if (err) { | |
1525 | dev_err(&device->dev, "_PRW evaluation error: %d\n", err); | |
d57d09a4 | 1526 | return; |
9e89dde2 | 1527 | } |
1da177e4 | 1528 | |
9e89dde2 | 1529 | device->wakeup.flags.valid = 1; |
9b83ccd2 | 1530 | device->wakeup.prepare_count = 0; |
bd9b2f9a | 1531 | acpi_wakeup_gpe_init(device); |
729b2bdb ZY |
1532 | /* Call _PSW/_DSW object to disable its ability to wake the sleeping |
1533 | * system for the ACPI device with the _PRW object. | |
1534 | * The _PSW object is depreciated in ACPI 3.0 and is replaced by _DSW. | |
1535 | * So it is necessary to call _DSW object first. Only when it is not | |
1536 | * present will the _PSW object used. | |
1537 | */ | |
e88c9c60 RW |
1538 | err = acpi_device_sleep_wake(device, 0, 0, 0); |
1539 | if (err) | |
77e76609 RW |
1540 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
1541 | "error in _DSW or _PSW evaluation\n")); | |
1da177e4 | 1542 | } |
1da177e4 | 1543 | |
f33ce568 RW |
1544 | static void acpi_bus_init_power_state(struct acpi_device *device, int state) |
1545 | { | |
1546 | struct acpi_device_power_state *ps = &device->power.states[state]; | |
ef85bdbe RW |
1547 | char pathname[5] = { '_', 'P', 'R', '0' + state, '\0' }; |
1548 | struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; | |
f33ce568 | 1549 | acpi_status status; |
bf325f95 | 1550 | |
f33ce568 RW |
1551 | INIT_LIST_HEAD(&ps->resources); |
1552 | ||
ef85bdbe RW |
1553 | /* Evaluate "_PRx" to get referenced power resources */ |
1554 | status = acpi_evaluate_object(device->handle, pathname, NULL, &buffer); | |
1555 | if (ACPI_SUCCESS(status)) { | |
1556 | union acpi_object *package = buffer.pointer; | |
1557 | ||
1558 | if (buffer.length && package | |
1559 | && package->type == ACPI_TYPE_PACKAGE | |
1560 | && package->package.count) { | |
e88c9c60 RW |
1561 | int err = acpi_extract_power_resources(package, 0, |
1562 | &ps->resources); | |
1563 | if (!err) | |
ef85bdbe | 1564 | device->power.flags.power_resources = 1; |
f33ce568 | 1565 | } |
ef85bdbe | 1566 | ACPI_FREE(buffer.pointer); |
f33ce568 RW |
1567 | } |
1568 | ||
1569 | /* Evaluate "_PSx" to see if we can do explicit sets */ | |
ef85bdbe | 1570 | pathname[2] = 'S'; |
952c63e9 | 1571 | if (acpi_has_method(device->handle, pathname)) |
f33ce568 RW |
1572 | ps->flags.explicit_set = 1; |
1573 | ||
1574 | /* | |
1575 | * State is valid if there are means to put the device into it. | |
1576 | * D3hot is only valid if _PR3 present. | |
1577 | */ | |
ef85bdbe | 1578 | if (!list_empty(&ps->resources) |
f33ce568 RW |
1579 | || (ps->flags.explicit_set && state < ACPI_STATE_D3_HOT)) { |
1580 | ps->flags.valid = 1; | |
1581 | ps->flags.os_accessible = 1; | |
1582 | } | |
1583 | ||
1584 | ps->power = -1; /* Unknown - driver assigned */ | |
1585 | ps->latency = -1; /* Unknown - driver assigned */ | |
1586 | } | |
1587 | ||
d43e167d | 1588 | static void acpi_bus_get_power_flags(struct acpi_device *device) |
1da177e4 | 1589 | { |
8bc5053b | 1590 | u32 i; |
1a365616 | 1591 | |
d43e167d | 1592 | /* Presence of _PS0|_PR0 indicates 'power manageable' */ |
952c63e9 JL |
1593 | if (!acpi_has_method(device->handle, "_PS0") && |
1594 | !acpi_has_method(device->handle, "_PR0")) | |
1595 | return; | |
1a365616 | 1596 | |
d43e167d | 1597 | device->flags.power_manageable = 1; |
4be44fcd | 1598 | |
9e89dde2 ZR |
1599 | /* |
1600 | * Power Management Flags | |
1601 | */ | |
952c63e9 | 1602 | if (acpi_has_method(device->handle, "_PSC")) |
9e89dde2 | 1603 | device->power.flags.explicit_get = 1; |
f25c0ae2 | 1604 | |
952c63e9 | 1605 | if (acpi_has_method(device->handle, "_IRC")) |
9e89dde2 | 1606 | device->power.flags.inrush_current = 1; |
1da177e4 | 1607 | |
f25c0ae2 RW |
1608 | if (acpi_has_method(device->handle, "_DSW")) |
1609 | device->power.flags.dsw_present = 1; | |
1610 | ||
9e89dde2 ZR |
1611 | /* |
1612 | * Enumerate supported power management states | |
1613 | */ | |
f33ce568 RW |
1614 | for (i = ACPI_STATE_D0; i <= ACPI_STATE_D3_HOT; i++) |
1615 | acpi_bus_init_power_state(device, i); | |
bf325f95 | 1616 | |
0b224527 | 1617 | INIT_LIST_HEAD(&device->power.states[ACPI_STATE_D3_COLD].resources); |
1da177e4 | 1618 | |
9e89dde2 ZR |
1619 | /* Set defaults for D0 and D3 states (always valid) */ |
1620 | device->power.states[ACPI_STATE_D0].flags.valid = 1; | |
1621 | device->power.states[ACPI_STATE_D0].power = 100; | |
8ad928d5 RW |
1622 | device->power.states[ACPI_STATE_D3_COLD].flags.valid = 1; |
1623 | device->power.states[ACPI_STATE_D3_COLD].power = 0; | |
c8f7a62c | 1624 | |
5c7dd710 RW |
1625 | /* Set D3cold's explicit_set flag if _PS3 exists. */ |
1626 | if (device->power.states[ACPI_STATE_D3_HOT].flags.explicit_set) | |
1627 | device->power.states[ACPI_STATE_D3_COLD].flags.explicit_set = 1; | |
1628 | ||
1399dfcd AL |
1629 | /* Presence of _PS3 or _PRx means we can put the device into D3 cold */ |
1630 | if (device->power.states[ACPI_STATE_D3_HOT].flags.explicit_set || | |
1631 | device->power.flags.power_resources) | |
1632 | device->power.states[ACPI_STATE_D3_COLD].flags.os_accessible = 1; | |
1633 | ||
b3785492 RW |
1634 | if (acpi_bus_init_power(device)) { |
1635 | acpi_free_power_resources_lists(device); | |
1636 | device->flags.power_manageable = 0; | |
1637 | } | |
9e89dde2 | 1638 | } |
c8f7a62c | 1639 | |
d43e167d | 1640 | static void acpi_bus_get_flags(struct acpi_device *device) |
1da177e4 | 1641 | { |
1da177e4 | 1642 | /* Presence of _STA indicates 'dynamic_status' */ |
952c63e9 | 1643 | if (acpi_has_method(device->handle, "_STA")) |
1da177e4 LT |
1644 | device->flags.dynamic_status = 1; |
1645 | ||
1da177e4 | 1646 | /* Presence of _RMV indicates 'removable' */ |
952c63e9 | 1647 | if (acpi_has_method(device->handle, "_RMV")) |
1da177e4 LT |
1648 | device->flags.removable = 1; |
1649 | ||
1650 | /* Presence of _EJD|_EJ0 indicates 'ejectable' */ | |
952c63e9 JL |
1651 | if (acpi_has_method(device->handle, "_EJD") || |
1652 | acpi_has_method(device->handle, "_EJ0")) | |
1da177e4 | 1653 | device->flags.ejectable = 1; |
1da177e4 LT |
1654 | } |
1655 | ||
c7bcb4e9 | 1656 | static void acpi_device_get_busid(struct acpi_device *device) |
1da177e4 | 1657 | { |
4be44fcd LB |
1658 | char bus_id[5] = { '?', 0 }; |
1659 | struct acpi_buffer buffer = { sizeof(bus_id), bus_id }; | |
1660 | int i = 0; | |
1da177e4 LT |
1661 | |
1662 | /* | |
1663 | * Bus ID | |
1664 | * ------ | |
1665 | * The device's Bus ID is simply the object name. | |
1666 | * TBD: Shouldn't this value be unique (within the ACPI namespace)? | |
1667 | */ | |
859ac9a4 | 1668 | if (ACPI_IS_ROOT_DEVICE(device)) { |
1da177e4 | 1669 | strcpy(device->pnp.bus_id, "ACPI"); |
859ac9a4 BH |
1670 | return; |
1671 | } | |
1672 | ||
1673 | switch (device->device_type) { | |
1da177e4 LT |
1674 | case ACPI_BUS_TYPE_POWER_BUTTON: |
1675 | strcpy(device->pnp.bus_id, "PWRF"); | |
1676 | break; | |
1677 | case ACPI_BUS_TYPE_SLEEP_BUTTON: | |
1678 | strcpy(device->pnp.bus_id, "SLPF"); | |
1679 | break; | |
1680 | default: | |
66b7ed40 | 1681 | acpi_get_name(device->handle, ACPI_SINGLE_NAME, &buffer); |
1da177e4 LT |
1682 | /* Clean up trailing underscores (if any) */ |
1683 | for (i = 3; i > 1; i--) { | |
1684 | if (bus_id[i] == '_') | |
1685 | bus_id[i] = '\0'; | |
1686 | else | |
1687 | break; | |
1688 | } | |
1689 | strcpy(device->pnp.bus_id, bus_id); | |
1690 | break; | |
1691 | } | |
1692 | } | |
1693 | ||
ebf4df8d JL |
1694 | /* |
1695 | * acpi_ata_match - see if an acpi object is an ATA device | |
1696 | * | |
1697 | * If an acpi object has one of the ACPI ATA methods defined, | |
1698 | * then we can safely call it an ATA device. | |
1699 | */ | |
1700 | bool acpi_ata_match(acpi_handle handle) | |
1701 | { | |
1702 | return acpi_has_method(handle, "_GTF") || | |
1703 | acpi_has_method(handle, "_GTM") || | |
1704 | acpi_has_method(handle, "_STM") || | |
1705 | acpi_has_method(handle, "_SDD"); | |
1706 | } | |
1707 | ||
54735266 | 1708 | /* |
d4e1a692 | 1709 | * acpi_bay_match - see if an acpi object is an ejectable driver bay |
54735266 ZR |
1710 | * |
1711 | * If an acpi object is ejectable and has one of the ACPI ATA methods defined, | |
1712 | * then we can safely call it an ejectable drive bay | |
1713 | */ | |
ebf4df8d | 1714 | bool acpi_bay_match(acpi_handle handle) |
d4e1a692 | 1715 | { |
54735266 ZR |
1716 | acpi_handle phandle; |
1717 | ||
952c63e9 | 1718 | if (!acpi_has_method(handle, "_EJ0")) |
ebf4df8d JL |
1719 | return false; |
1720 | if (acpi_ata_match(handle)) | |
1721 | return true; | |
1722 | if (ACPI_FAILURE(acpi_get_parent(handle, &phandle))) | |
1723 | return false; | |
54735266 | 1724 | |
ebf4df8d | 1725 | return acpi_ata_match(phandle); |
54735266 ZR |
1726 | } |
1727 | ||
b43109fa | 1728 | bool acpi_device_is_battery(struct acpi_device *adev) |
1e2380cd | 1729 | { |
b43109fa | 1730 | struct acpi_hardware_id *hwid; |
1e2380cd | 1731 | |
b43109fa RW |
1732 | list_for_each_entry(hwid, &adev->pnp.ids, list) |
1733 | if (!strcmp("PNP0C0A", hwid->id)) | |
1734 | return true; | |
1e2380cd | 1735 | |
b43109fa | 1736 | return false; |
1e2380cd RW |
1737 | } |
1738 | ||
b43109fa | 1739 | static bool is_ejectable_bay(struct acpi_device *adev) |
1e2380cd | 1740 | { |
b43109fa RW |
1741 | acpi_handle handle = adev->handle; |
1742 | ||
1743 | if (acpi_has_method(handle, "_EJ0") && acpi_device_is_battery(adev)) | |
1e2380cd RW |
1744 | return true; |
1745 | ||
1746 | return acpi_bay_match(handle); | |
1747 | } | |
1748 | ||
3620f2f2 | 1749 | /* |
d4e1a692 | 1750 | * acpi_dock_match - see if an acpi object has a _DCK method |
3620f2f2 | 1751 | */ |
ebf4df8d | 1752 | bool acpi_dock_match(acpi_handle handle) |
3620f2f2 | 1753 | { |
ebf4df8d | 1754 | return acpi_has_method(handle, "_DCK"); |
3620f2f2 FS |
1755 | } |
1756 | ||
620e112c | 1757 | const char *acpi_device_hid(struct acpi_device *device) |
15b8dd53 | 1758 | { |
7f47fa6c | 1759 | struct acpi_hardware_id *hid; |
15b8dd53 | 1760 | |
2b2ae7c7 TR |
1761 | if (list_empty(&device->pnp.ids)) |
1762 | return dummy_hid; | |
1763 | ||
7f47fa6c BH |
1764 | hid = list_first_entry(&device->pnp.ids, struct acpi_hardware_id, list); |
1765 | return hid->id; | |
1766 | } | |
1767 | EXPORT_SYMBOL(acpi_device_hid); | |
15b8dd53 | 1768 | |
d4e1a692 | 1769 | static void acpi_add_id(struct acpi_device_pnp *pnp, const char *dev_id) |
7f47fa6c BH |
1770 | { |
1771 | struct acpi_hardware_id *id; | |
15b8dd53 | 1772 | |
7f47fa6c BH |
1773 | id = kmalloc(sizeof(*id), GFP_KERNEL); |
1774 | if (!id) | |
1775 | return; | |
15b8dd53 | 1776 | |
581de59e | 1777 | id->id = kstrdup(dev_id, GFP_KERNEL); |
7f47fa6c BH |
1778 | if (!id->id) { |
1779 | kfree(id); | |
1780 | return; | |
15b8dd53 BM |
1781 | } |
1782 | ||
d4e1a692 TK |
1783 | list_add_tail(&id->list, &pnp->ids); |
1784 | pnp->type.hardware_id = 1; | |
15b8dd53 BM |
1785 | } |
1786 | ||
222e82ac DW |
1787 | /* |
1788 | * Old IBM workstations have a DSDT bug wherein the SMBus object | |
1789 | * lacks the SMBUS01 HID and the methods do not have the necessary "_" | |
1790 | * prefix. Work around this. | |
1791 | */ | |
ebf4df8d | 1792 | static bool acpi_ibm_smbus_match(acpi_handle handle) |
222e82ac | 1793 | { |
ebf4df8d JL |
1794 | char node_name[ACPI_PATH_SEGMENT_LENGTH]; |
1795 | struct acpi_buffer path = { sizeof(node_name), node_name }; | |
222e82ac DW |
1796 | |
1797 | if (!dmi_name_in_vendors("IBM")) | |
ebf4df8d | 1798 | return false; |
222e82ac DW |
1799 | |
1800 | /* Look for SMBS object */ | |
ebf4df8d JL |
1801 | if (ACPI_FAILURE(acpi_get_name(handle, ACPI_SINGLE_NAME, &path)) || |
1802 | strcmp("SMBS", path.pointer)) | |
1803 | return false; | |
222e82ac DW |
1804 | |
1805 | /* Does it have the necessary (but misnamed) methods? */ | |
952c63e9 JL |
1806 | if (acpi_has_method(handle, "SBI") && |
1807 | acpi_has_method(handle, "SBR") && | |
1808 | acpi_has_method(handle, "SBW")) | |
ebf4df8d JL |
1809 | return true; |
1810 | ||
1811 | return false; | |
222e82ac DW |
1812 | } |
1813 | ||
ae3caa80 JL |
1814 | static bool acpi_object_is_system_bus(acpi_handle handle) |
1815 | { | |
1816 | acpi_handle tmp; | |
1817 | ||
1818 | if (ACPI_SUCCESS(acpi_get_handle(NULL, "\\_SB", &tmp)) && | |
1819 | tmp == handle) | |
1820 | return true; | |
1821 | if (ACPI_SUCCESS(acpi_get_handle(NULL, "\\_TZ", &tmp)) && | |
1822 | tmp == handle) | |
1823 | return true; | |
1824 | ||
1825 | return false; | |
1826 | } | |
1827 | ||
c0af4175 TK |
1828 | static void acpi_set_pnp_ids(acpi_handle handle, struct acpi_device_pnp *pnp, |
1829 | int device_type) | |
1da177e4 | 1830 | { |
4be44fcd | 1831 | acpi_status status; |
57f3674f | 1832 | struct acpi_device_info *info; |
78e25fef | 1833 | struct acpi_pnp_device_id_list *cid_list; |
7f47fa6c | 1834 | int i; |
1da177e4 | 1835 | |
c0af4175 | 1836 | switch (device_type) { |
1da177e4 | 1837 | case ACPI_BUS_TYPE_DEVICE: |
c0af4175 TK |
1838 | if (handle == ACPI_ROOT_OBJECT) { |
1839 | acpi_add_id(pnp, ACPI_SYSTEM_HID); | |
859ac9a4 BH |
1840 | break; |
1841 | } | |
1842 | ||
c0af4175 | 1843 | status = acpi_get_object_info(handle, &info); |
1da177e4 | 1844 | if (ACPI_FAILURE(status)) { |
c0af4175 TK |
1845 | pr_err(PREFIX "%s: Error reading device info\n", |
1846 | __func__); | |
1da177e4 LT |
1847 | return; |
1848 | } | |
1849 | ||
549e6845 | 1850 | if (info->valid & ACPI_VALID_HID) { |
c0af4175 | 1851 | acpi_add_id(pnp, info->hardware_id.string); |
549e6845 RW |
1852 | pnp->type.platform_id = 1; |
1853 | } | |
57f3674f | 1854 | if (info->valid & ACPI_VALID_CID) { |
15b8dd53 | 1855 | cid_list = &info->compatible_id_list; |
57f3674f | 1856 | for (i = 0; i < cid_list->count; i++) |
c0af4175 | 1857 | acpi_add_id(pnp, cid_list->ids[i].string); |
57f3674f | 1858 | } |
1da177e4 | 1859 | if (info->valid & ACPI_VALID_ADR) { |
c0af4175 TK |
1860 | pnp->bus_address = info->address; |
1861 | pnp->type.bus_address = 1; | |
1da177e4 | 1862 | } |
ccf78040 | 1863 | if (info->valid & ACPI_VALID_UID) |
c0af4175 | 1864 | pnp->unique_id = kstrdup(info->unique_id.string, |
ccf78040 | 1865 | GFP_KERNEL); |
ae843332 | 1866 | |
a83893ae BH |
1867 | kfree(info); |
1868 | ||
57f3674f BH |
1869 | /* |
1870 | * Some devices don't reliably have _HIDs & _CIDs, so add | |
1871 | * synthetic HIDs to make sure drivers can find them. | |
1872 | */ | |
c0af4175 TK |
1873 | if (acpi_is_video_device(handle)) |
1874 | acpi_add_id(pnp, ACPI_VIDEO_HID); | |
ebf4df8d | 1875 | else if (acpi_bay_match(handle)) |
c0af4175 | 1876 | acpi_add_id(pnp, ACPI_BAY_HID); |
ebf4df8d | 1877 | else if (acpi_dock_match(handle)) |
c0af4175 | 1878 | acpi_add_id(pnp, ACPI_DOCK_HID); |
ebf4df8d | 1879 | else if (acpi_ibm_smbus_match(handle)) |
c0af4175 | 1880 | acpi_add_id(pnp, ACPI_SMBUS_IBM_HID); |
ae3caa80 JL |
1881 | else if (list_empty(&pnp->ids) && |
1882 | acpi_object_is_system_bus(handle)) { | |
1883 | /* \_SB, \_TZ, LNXSYBUS */ | |
1884 | acpi_add_id(pnp, ACPI_BUS_HID); | |
c0af4175 TK |
1885 | strcpy(pnp->device_name, ACPI_BUS_DEVICE_NAME); |
1886 | strcpy(pnp->device_class, ACPI_BUS_CLASS); | |
b7b30de5 | 1887 | } |
54735266 | 1888 | |
1da177e4 LT |
1889 | break; |
1890 | case ACPI_BUS_TYPE_POWER: | |
c0af4175 | 1891 | acpi_add_id(pnp, ACPI_POWER_HID); |
1da177e4 LT |
1892 | break; |
1893 | case ACPI_BUS_TYPE_PROCESSOR: | |
c0af4175 | 1894 | acpi_add_id(pnp, ACPI_PROCESSOR_OBJECT_HID); |
1da177e4 | 1895 | break; |
1da177e4 | 1896 | case ACPI_BUS_TYPE_THERMAL: |
c0af4175 | 1897 | acpi_add_id(pnp, ACPI_THERMAL_HID); |
1da177e4 LT |
1898 | break; |
1899 | case ACPI_BUS_TYPE_POWER_BUTTON: | |
c0af4175 | 1900 | acpi_add_id(pnp, ACPI_BUTTON_HID_POWERF); |
1da177e4 LT |
1901 | break; |
1902 | case ACPI_BUS_TYPE_SLEEP_BUTTON: | |
c0af4175 | 1903 | acpi_add_id(pnp, ACPI_BUTTON_HID_SLEEPF); |
1da177e4 LT |
1904 | break; |
1905 | } | |
1da177e4 LT |
1906 | } |
1907 | ||
c0af4175 TK |
1908 | void acpi_free_pnp_ids(struct acpi_device_pnp *pnp) |
1909 | { | |
1910 | struct acpi_hardware_id *id, *tmp; | |
1911 | ||
1912 | list_for_each_entry_safe(id, tmp, &pnp->ids, list) { | |
1913 | kfree(id->id); | |
1914 | kfree(id); | |
1915 | } | |
1916 | kfree(pnp->unique_id); | |
1917 | } | |
1918 | ||
82c7d5ef RW |
1919 | void acpi_init_device_object(struct acpi_device *device, acpi_handle handle, |
1920 | int type, unsigned long long sta) | |
1da177e4 | 1921 | { |
d43e167d RW |
1922 | INIT_LIST_HEAD(&device->pnp.ids); |
1923 | device->device_type = type; | |
1924 | device->handle = handle; | |
1925 | device->parent = acpi_bus_get_parent(handle); | |
25db115b | 1926 | acpi_set_device_status(device, sta); |
d43e167d | 1927 | acpi_device_get_busid(device); |
c0af4175 | 1928 | acpi_set_pnp_ids(handle, &device->pnp, type); |
d43e167d | 1929 | acpi_bus_get_flags(device); |
2c0d4fe0 | 1930 | device->flags.match_driver = false; |
202317a5 RW |
1931 | device->flags.initialized = true; |
1932 | device->flags.visited = false; | |
cf860be6 RW |
1933 | device_initialize(&device->dev); |
1934 | dev_set_uevent_suppress(&device->dev, true); | |
1935 | } | |
bc3b0772 | 1936 | |
cf860be6 RW |
1937 | void acpi_device_add_finalize(struct acpi_device *device) |
1938 | { | |
1939 | dev_set_uevent_suppress(&device->dev, false); | |
1940 | kobject_uevent(&device->dev.kobj, KOBJ_ADD); | |
1da177e4 LT |
1941 | } |
1942 | ||
5c478f49 BH |
1943 | static int acpi_add_single_object(struct acpi_device **child, |
1944 | acpi_handle handle, int type, | |
2c0d4fe0 | 1945 | unsigned long long sta) |
1da177e4 | 1946 | { |
77c24888 BH |
1947 | int result; |
1948 | struct acpi_device *device; | |
29aaefa6 | 1949 | struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; |
1da177e4 | 1950 | |
36bcbec7 | 1951 | device = kzalloc(sizeof(struct acpi_device), GFP_KERNEL); |
1da177e4 | 1952 | if (!device) { |
6468463a | 1953 | printk(KERN_ERR PREFIX "Memory allocation error\n"); |
d550d98d | 1954 | return -ENOMEM; |
1da177e4 | 1955 | } |
1da177e4 | 1956 | |
d43e167d RW |
1957 | acpi_init_device_object(device, handle, type, sta); |
1958 | acpi_bus_get_power_flags(device); | |
d57d09a4 | 1959 | acpi_bus_get_wakeup_device_flags(device); |
1da177e4 | 1960 | |
cf860be6 | 1961 | result = acpi_device_add(device, acpi_device_release); |
d43e167d | 1962 | if (result) { |
718fb0de | 1963 | acpi_device_release(&device->dev); |
d43e167d RW |
1964 | return result; |
1965 | } | |
1da177e4 | 1966 | |
d43e167d | 1967 | acpi_power_add_remove_device(device, true); |
cf860be6 | 1968 | acpi_device_add_finalize(device); |
d43e167d RW |
1969 | acpi_get_name(handle, ACPI_FULL_PATHNAME, &buffer); |
1970 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Added %s [%s] parent %s\n", | |
1971 | dev_name(&device->dev), (char *) buffer.pointer, | |
1972 | device->parent ? dev_name(&device->parent->dev) : "(null)")); | |
1973 | kfree(buffer.pointer); | |
1974 | *child = device; | |
1975 | return 0; | |
bf325f95 RW |
1976 | } |
1977 | ||
778cbc1d BH |
1978 | static int acpi_bus_type_and_status(acpi_handle handle, int *type, |
1979 | unsigned long long *sta) | |
1da177e4 | 1980 | { |
778cbc1d BH |
1981 | acpi_status status; |
1982 | acpi_object_type acpi_type; | |
1da177e4 | 1983 | |
778cbc1d | 1984 | status = acpi_get_type(handle, &acpi_type); |
51a85faf | 1985 | if (ACPI_FAILURE(status)) |
778cbc1d | 1986 | return -ENODEV; |
4be44fcd | 1987 | |
778cbc1d | 1988 | switch (acpi_type) { |
51a85faf BH |
1989 | case ACPI_TYPE_ANY: /* for ACPI_ROOT_OBJECT */ |
1990 | case ACPI_TYPE_DEVICE: | |
778cbc1d BH |
1991 | *type = ACPI_BUS_TYPE_DEVICE; |
1992 | status = acpi_bus_get_status_handle(handle, sta); | |
1993 | if (ACPI_FAILURE(status)) | |
1994 | return -ENODEV; | |
51a85faf BH |
1995 | break; |
1996 | case ACPI_TYPE_PROCESSOR: | |
778cbc1d BH |
1997 | *type = ACPI_BUS_TYPE_PROCESSOR; |
1998 | status = acpi_bus_get_status_handle(handle, sta); | |
1999 | if (ACPI_FAILURE(status)) | |
2000 | return -ENODEV; | |
51a85faf BH |
2001 | break; |
2002 | case ACPI_TYPE_THERMAL: | |
778cbc1d BH |
2003 | *type = ACPI_BUS_TYPE_THERMAL; |
2004 | *sta = ACPI_STA_DEFAULT; | |
51a85faf BH |
2005 | break; |
2006 | case ACPI_TYPE_POWER: | |
778cbc1d BH |
2007 | *type = ACPI_BUS_TYPE_POWER; |
2008 | *sta = ACPI_STA_DEFAULT; | |
51a85faf BH |
2009 | break; |
2010 | default: | |
778cbc1d | 2011 | return -ENODEV; |
51a85faf | 2012 | } |
1da177e4 | 2013 | |
778cbc1d BH |
2014 | return 0; |
2015 | } | |
2016 | ||
202317a5 RW |
2017 | bool acpi_device_is_present(struct acpi_device *adev) |
2018 | { | |
2019 | if (adev->status.present || adev->status.functional) | |
2020 | return true; | |
2021 | ||
2022 | adev->flags.initialized = false; | |
2023 | return false; | |
2024 | } | |
2025 | ||
4b59cc1f RW |
2026 | static bool acpi_scan_handler_matching(struct acpi_scan_handler *handler, |
2027 | char *idstr, | |
2028 | const struct acpi_device_id **matchid) | |
2029 | { | |
2030 | const struct acpi_device_id *devid; | |
2031 | ||
aca0a4eb RW |
2032 | if (handler->match) |
2033 | return handler->match(idstr, matchid); | |
2034 | ||
4b59cc1f RW |
2035 | for (devid = handler->ids; devid->id[0]; devid++) |
2036 | if (!strcmp((char *)devid->id, idstr)) { | |
2037 | if (matchid) | |
2038 | *matchid = devid; | |
2039 | ||
2040 | return true; | |
2041 | } | |
2042 | ||
2043 | return false; | |
2044 | } | |
2045 | ||
6b772e8f TK |
2046 | static struct acpi_scan_handler *acpi_scan_match_handler(char *idstr, |
2047 | const struct acpi_device_id **matchid) | |
2048 | { | |
2049 | struct acpi_scan_handler *handler; | |
2050 | ||
2051 | list_for_each_entry(handler, &acpi_scan_handlers_list, list_node) | |
2052 | if (acpi_scan_handler_matching(handler, idstr, matchid)) | |
2053 | return handler; | |
2054 | ||
2055 | return NULL; | |
2056 | } | |
2057 | ||
3f8055c3 RW |
2058 | void acpi_scan_hotplug_enabled(struct acpi_hotplug_profile *hotplug, bool val) |
2059 | { | |
3f8055c3 RW |
2060 | if (!!hotplug->enabled == !!val) |
2061 | return; | |
2062 | ||
2063 | mutex_lock(&acpi_scan_lock); | |
2064 | ||
2065 | hotplug->enabled = val; | |
3f8055c3 RW |
2066 | |
2067 | mutex_unlock(&acpi_scan_lock); | |
2068 | } | |
2069 | ||
3c2cc7ff | 2070 | static void acpi_scan_init_hotplug(struct acpi_device *adev) |
a33ec399 | 2071 | { |
6b772e8f | 2072 | struct acpi_hardware_id *hwid; |
a33ec399 | 2073 | |
b43109fa | 2074 | if (acpi_dock_match(adev->handle) || is_ejectable_bay(adev)) { |
1e2380cd RW |
2075 | acpi_dock_add(adev); |
2076 | return; | |
2077 | } | |
3c2cc7ff RW |
2078 | list_for_each_entry(hwid, &adev->pnp.ids, list) { |
2079 | struct acpi_scan_handler *handler; | |
a33ec399 | 2080 | |
6b772e8f | 2081 | handler = acpi_scan_match_handler(hwid->id, NULL); |
1a699476 RW |
2082 | if (handler) { |
2083 | adev->flags.hotplug_notify = true; | |
2084 | break; | |
2085 | } | |
3c2cc7ff | 2086 | } |
a33ec399 RW |
2087 | } |
2088 | ||
e3863094 RW |
2089 | static acpi_status acpi_bus_check_add(acpi_handle handle, u32 lvl_not_used, |
2090 | void *not_used, void **return_value) | |
778cbc1d | 2091 | { |
805d410f | 2092 | struct acpi_device *device = NULL; |
778cbc1d BH |
2093 | int type; |
2094 | unsigned long long sta; | |
2095 | int result; | |
2096 | ||
4002bf38 RW |
2097 | acpi_bus_get_device(handle, &device); |
2098 | if (device) | |
2099 | goto out; | |
2100 | ||
778cbc1d BH |
2101 | result = acpi_bus_type_and_status(handle, &type, &sta); |
2102 | if (result) | |
2103 | return AE_OK; | |
2104 | ||
82c7d5ef RW |
2105 | if (type == ACPI_BUS_TYPE_POWER) { |
2106 | acpi_add_power_resource(handle); | |
2107 | return AE_OK; | |
2108 | } | |
2109 | ||
2c0d4fe0 | 2110 | acpi_add_single_object(&device, handle, type, sta); |
e3b87f8a | 2111 | if (!device) |
51a85faf | 2112 | return AE_CTRL_DEPTH; |
1da177e4 | 2113 | |
3c2cc7ff RW |
2114 | acpi_scan_init_hotplug(device); |
2115 | ||
4002bf38 | 2116 | out: |
51a85faf BH |
2117 | if (!*return_value) |
2118 | *return_value = device; | |
805d410f | 2119 | |
51a85faf BH |
2120 | return AE_OK; |
2121 | } | |
3fb02738 | 2122 | |
48459340 ZR |
2123 | static int acpi_check_spi_i2c_slave(struct acpi_resource *ares, void *data) |
2124 | { | |
2125 | bool *is_spi_i2c_slave_p = data; | |
2126 | ||
2127 | if (ares->type != ACPI_RESOURCE_TYPE_SERIAL_BUS) | |
2128 | return 1; | |
2129 | ||
2130 | /* | |
2131 | * devices that are connected to UART still need to be enumerated to | |
2132 | * platform bus | |
2133 | */ | |
2134 | if (ares->data.common_serial_bus.type != ACPI_RESOURCE_SERIAL_TYPE_UART) | |
2135 | *is_spi_i2c_slave_p = true; | |
2136 | ||
2137 | /* no need to do more checking */ | |
2138 | return -1; | |
2139 | } | |
2140 | ||
2141 | static void acpi_default_enumeration(struct acpi_device *device) | |
2142 | { | |
2143 | struct list_head resource_list; | |
2144 | bool is_spi_i2c_slave = false; | |
2145 | ||
2146 | if (!device->pnp.type.platform_id || device->handler) | |
2147 | return; | |
2148 | ||
2149 | /* | |
2150 | * Do not enemerate SPI/I2C slaves as they will be enuerated by their | |
2151 | * respective parents. | |
2152 | */ | |
2153 | INIT_LIST_HEAD(&resource_list); | |
2154 | acpi_dev_get_resources(device, &resource_list, acpi_check_spi_i2c_slave, | |
2155 | &is_spi_i2c_slave); | |
2156 | acpi_dev_free_resource_list(&resource_list); | |
2157 | if (!is_spi_i2c_slave) | |
2158 | acpi_create_platform_device(device); | |
2159 | } | |
2160 | ||
c5698074 | 2161 | static int acpi_scan_attach_handler(struct acpi_device *device) |
ca589f94 | 2162 | { |
c5698074 RW |
2163 | struct acpi_hardware_id *hwid; |
2164 | int ret = 0; | |
ca589f94 | 2165 | |
c5698074 | 2166 | list_for_each_entry(hwid, &device->pnp.ids, list) { |
87b85b3c | 2167 | const struct acpi_device_id *devid; |
c5698074 | 2168 | struct acpi_scan_handler *handler; |
ca589f94 | 2169 | |
c5698074 RW |
2170 | handler = acpi_scan_match_handler(hwid->id, &devid); |
2171 | if (handler) { | |
d34afa9d RW |
2172 | if (!handler->attach) { |
2173 | device->pnp.type.platform_id = 0; | |
2174 | continue; | |
2175 | } | |
9cb32acf | 2176 | device->handler = handler; |
87b85b3c | 2177 | ret = handler->attach(device, devid); |
9cb32acf | 2178 | if (ret > 0) |
c5698074 | 2179 | break; |
9cb32acf RW |
2180 | |
2181 | device->handler = NULL; | |
2182 | if (ret < 0) | |
c5698074 | 2183 | break; |
ca589f94 RW |
2184 | } |
2185 | } | |
48459340 ZR |
2186 | if (!ret) |
2187 | acpi_default_enumeration(device); | |
2188 | ||
ca589f94 RW |
2189 | return ret; |
2190 | } | |
2191 | ||
2c22e652 | 2192 | static void acpi_bus_attach(struct acpi_device *device) |
51a85faf | 2193 | { |
2c22e652 | 2194 | struct acpi_device *child; |
1e2380cd | 2195 | acpi_handle ejd; |
ca589f94 | 2196 | int ret; |
3fb02738 | 2197 | |
1e2380cd RW |
2198 | if (ACPI_SUCCESS(acpi_bus_get_ejd(device->handle, &ejd))) |
2199 | register_dock_dependent_device(device, ejd); | |
2200 | ||
2c22e652 | 2201 | acpi_bus_get_status(device); |
202317a5 | 2202 | /* Skip devices that are not present. */ |
2c22e652 RW |
2203 | if (!acpi_device_is_present(device)) { |
2204 | device->flags.visited = false; | |
2205 | return; | |
2206 | } | |
3a391a39 | 2207 | if (device->handler) |
2c22e652 | 2208 | goto ok; |
3a391a39 | 2209 | |
202317a5 RW |
2210 | if (!device->flags.initialized) { |
2211 | acpi_bus_update_power(device, NULL); | |
2212 | device->flags.initialized = true; | |
2213 | } | |
2c22e652 | 2214 | device->flags.visited = false; |
ca589f94 | 2215 | ret = acpi_scan_attach_handler(device); |
6931007c | 2216 | if (ret < 0) |
2c22e652 | 2217 | return; |
6931007c RW |
2218 | |
2219 | device->flags.match_driver = true; | |
2c22e652 RW |
2220 | if (!ret) { |
2221 | ret = device_attach(&device->dev); | |
2222 | if (ret < 0) | |
2223 | return; | |
2224 | } | |
202317a5 | 2225 | device->flags.visited = true; |
202317a5 | 2226 | |
2c22e652 RW |
2227 | ok: |
2228 | list_for_each_entry(child, &device->children, node) | |
2229 | acpi_bus_attach(child); | |
8ab17fc9 RW |
2230 | |
2231 | if (device->handler && device->handler->hotplug.notify_online) | |
2232 | device->handler->hotplug.notify_online(device); | |
1da177e4 | 2233 | } |
1da177e4 | 2234 | |
636458de | 2235 | /** |
b8bd759a | 2236 | * acpi_bus_scan - Add ACPI device node objects in a given namespace scope. |
636458de | 2237 | * @handle: Root of the namespace scope to scan. |
7779688f | 2238 | * |
636458de RW |
2239 | * Scan a given ACPI tree (probably recently hot-plugged) and create and add |
2240 | * found devices. | |
7779688f | 2241 | * |
636458de RW |
2242 | * If no devices were found, -ENODEV is returned, but it does not mean that |
2243 | * there has been a real error. There just have been no suitable ACPI objects | |
2244 | * in the table trunk from which the kernel could create a device and add an | |
2245 | * appropriate driver. | |
3757b948 RW |
2246 | * |
2247 | * Must be called under acpi_scan_lock. | |
7779688f | 2248 | */ |
b8bd759a | 2249 | int acpi_bus_scan(acpi_handle handle) |
3fb02738 | 2250 | { |
b8bd759a | 2251 | void *device = NULL; |
3fb02738 | 2252 | |
b8bd759a RW |
2253 | if (ACPI_SUCCESS(acpi_bus_check_add(handle, 0, NULL, &device))) |
2254 | acpi_walk_namespace(ACPI_TYPE_ANY, handle, ACPI_UINT32_MAX, | |
2255 | acpi_bus_check_add, NULL, NULL, &device); | |
3fb02738 | 2256 | |
2c22e652 RW |
2257 | if (device) { |
2258 | acpi_bus_attach(device); | |
2259 | return 0; | |
05404d8f | 2260 | } |
2c22e652 | 2261 | return -ENODEV; |
3fb02738 | 2262 | } |
2c22e652 | 2263 | EXPORT_SYMBOL(acpi_bus_scan); |
1da177e4 | 2264 | |
3757b948 | 2265 | /** |
2c22e652 RW |
2266 | * acpi_bus_trim - Detach scan handlers and drivers from ACPI device objects. |
2267 | * @adev: Root of the ACPI namespace scope to walk. | |
3757b948 RW |
2268 | * |
2269 | * Must be called under acpi_scan_lock. | |
2270 | */ | |
2c22e652 | 2271 | void acpi_bus_trim(struct acpi_device *adev) |
1da177e4 | 2272 | { |
2c22e652 RW |
2273 | struct acpi_scan_handler *handler = adev->handler; |
2274 | struct acpi_device *child; | |
2275 | ||
2276 | list_for_each_entry_reverse(child, &adev->children, node) | |
2277 | acpi_bus_trim(child); | |
2278 | ||
a951c773 | 2279 | adev->flags.match_driver = false; |
2c22e652 RW |
2280 | if (handler) { |
2281 | if (handler->detach) | |
2282 | handler->detach(adev); | |
2283 | ||
2284 | adev->handler = NULL; | |
2285 | } else { | |
2286 | device_release_driver(&adev->dev); | |
2287 | } | |
05404d8f | 2288 | /* |
2c22e652 RW |
2289 | * Most likely, the device is going away, so put it into D3cold before |
2290 | * that. | |
05404d8f | 2291 | */ |
2c22e652 RW |
2292 | acpi_device_set_power(adev, ACPI_STATE_D3_COLD); |
2293 | adev->flags.initialized = false; | |
2294 | adev->flags.visited = false; | |
1da177e4 | 2295 | } |
ceaba663 KA |
2296 | EXPORT_SYMBOL_GPL(acpi_bus_trim); |
2297 | ||
e8b945c9 | 2298 | static int acpi_bus_scan_fixed(void) |
1da177e4 | 2299 | { |
4be44fcd | 2300 | int result = 0; |
c4168bff | 2301 | |
1da177e4 LT |
2302 | /* |
2303 | * Enumerate all fixed-feature devices. | |
2304 | */ | |
2c0d4fe0 RW |
2305 | if (!(acpi_gbl_FADT.flags & ACPI_FADT_POWER_BUTTON)) { |
2306 | struct acpi_device *device = NULL; | |
2307 | ||
5c478f49 | 2308 | result = acpi_add_single_object(&device, NULL, |
c4168bff | 2309 | ACPI_BUS_TYPE_POWER_BUTTON, |
2c0d4fe0 RW |
2310 | ACPI_STA_DEFAULT); |
2311 | if (result) | |
2312 | return result; | |
2313 | ||
88346167 | 2314 | device->flags.match_driver = true; |
2c0d4fe0 RW |
2315 | result = device_attach(&device->dev); |
2316 | if (result < 0) | |
2317 | return result; | |
2318 | ||
c10d7a13 | 2319 | device_init_wakeup(&device->dev, true); |
3fb02738 | 2320 | } |
1da177e4 | 2321 | |
2c0d4fe0 RW |
2322 | if (!(acpi_gbl_FADT.flags & ACPI_FADT_SLEEP_BUTTON)) { |
2323 | struct acpi_device *device = NULL; | |
2324 | ||
5c478f49 | 2325 | result = acpi_add_single_object(&device, NULL, |
c4168bff | 2326 | ACPI_BUS_TYPE_SLEEP_BUTTON, |
2c0d4fe0 RW |
2327 | ACPI_STA_DEFAULT); |
2328 | if (result) | |
2329 | return result; | |
2330 | ||
88346167 | 2331 | device->flags.match_driver = true; |
2c0d4fe0 | 2332 | result = device_attach(&device->dev); |
3fb02738 | 2333 | } |
1da177e4 | 2334 | |
2c0d4fe0 | 2335 | return result < 0 ? result : 0; |
1da177e4 LT |
2336 | } |
2337 | ||
e747f274 | 2338 | int __init acpi_scan_init(void) |
1da177e4 LT |
2339 | { |
2340 | int result; | |
1da177e4 | 2341 | |
5b327265 PM |
2342 | result = bus_register(&acpi_bus_type); |
2343 | if (result) { | |
2344 | /* We don't want to quit even if we failed to add suspend/resume */ | |
2345 | printk(KERN_ERR PREFIX "Could not register bus type\n"); | |
2346 | } | |
2347 | ||
92ef2a25 | 2348 | acpi_pci_root_init(); |
4daeaf68 | 2349 | acpi_pci_link_init(); |
ac212b69 | 2350 | acpi_processor_init(); |
f58b082a | 2351 | acpi_lpss_init(); |
2fa97feb | 2352 | acpi_cmos_rtc_init(); |
737f1a9f | 2353 | acpi_container_init(); |
0a347644 | 2354 | acpi_memory_hotplug_init(); |
eec15edb | 2355 | acpi_pnp_init(); |
3230bbfc | 2356 | acpi_int340x_thermal_init(); |
97d9a9e9 | 2357 | |
3757b948 | 2358 | mutex_lock(&acpi_scan_lock); |
1da177e4 LT |
2359 | /* |
2360 | * Enumerate devices in the ACPI namespace. | |
2361 | */ | |
0cd6ac52 RW |
2362 | result = acpi_bus_scan(ACPI_ROOT_OBJECT); |
2363 | if (result) | |
3757b948 | 2364 | goto out; |
1da177e4 | 2365 | |
0cd6ac52 | 2366 | result = acpi_bus_get_device(ACPI_ROOT_OBJECT, &acpi_root); |
1da177e4 | 2367 | if (result) |
3757b948 | 2368 | goto out; |
1da177e4 | 2369 | |
2650ef42 AL |
2370 | /* Fixed feature devices do not exist on HW-reduced platform */ |
2371 | if (!acpi_gbl_reduced_hardware) { | |
2372 | result = acpi_bus_scan_fixed(); | |
2373 | if (result) { | |
2374 | acpi_detach_data(acpi_root->handle, | |
2375 | acpi_scan_drop_device); | |
2376 | acpi_device_del(acpi_root); | |
2377 | put_device(&acpi_root->dev); | |
2378 | goto out; | |
2379 | } | |
b8bd759a | 2380 | } |
1da177e4 | 2381 | |
b8bd759a | 2382 | acpi_update_all_gpes(); |
3757b948 RW |
2383 | |
2384 | out: | |
2385 | mutex_unlock(&acpi_scan_lock); | |
2386 | return result; | |
1da177e4 | 2387 | } |