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 | |
40e7fcb1 LT |
39 | static LIST_HEAD(acpi_dep_list); |
40 | static DEFINE_MUTEX(acpi_dep_list_lock); | |
e49bd2dd | 41 | static LIST_HEAD(acpi_bus_id_list); |
c511cc19 | 42 | static DEFINE_MUTEX(acpi_scan_lock); |
ca589f94 | 43 | static LIST_HEAD(acpi_scan_handlers_list); |
9090589d | 44 | DEFINE_MUTEX(acpi_device_lock); |
1da177e4 | 45 | LIST_HEAD(acpi_wakeup_device_list); |
e525506f | 46 | static DEFINE_MUTEX(acpi_hp_context_lock); |
1da177e4 | 47 | |
40e7fcb1 LT |
48 | struct acpi_dep_data { |
49 | struct list_head node; | |
50 | acpi_handle master; | |
51 | acpi_handle slave; | |
52 | }; | |
53 | ||
e49bd2dd | 54 | struct acpi_device_bus_id{ |
bb095854 | 55 | char bus_id[15]; |
e49bd2dd ZR |
56 | unsigned int instance_no; |
57 | struct list_head node; | |
1da177e4 | 58 | }; |
29b71a1c | 59 | |
3757b948 RW |
60 | void acpi_scan_lock_acquire(void) |
61 | { | |
62 | mutex_lock(&acpi_scan_lock); | |
63 | } | |
64 | EXPORT_SYMBOL_GPL(acpi_scan_lock_acquire); | |
65 | ||
66 | void acpi_scan_lock_release(void) | |
67 | { | |
68 | mutex_unlock(&acpi_scan_lock); | |
69 | } | |
70 | EXPORT_SYMBOL_GPL(acpi_scan_lock_release); | |
71 | ||
e525506f RW |
72 | void acpi_lock_hp_context(void) |
73 | { | |
74 | mutex_lock(&acpi_hp_context_lock); | |
75 | } | |
76 | ||
77 | void acpi_unlock_hp_context(void) | |
78 | { | |
79 | mutex_unlock(&acpi_hp_context_lock); | |
80 | } | |
81 | ||
5d513205 RW |
82 | void acpi_initialize_hp_context(struct acpi_device *adev, |
83 | struct acpi_hotplug_context *hp, | |
84 | int (*notify)(struct acpi_device *, u32), | |
85 | void (*uevent)(struct acpi_device *, u32)) | |
86 | { | |
87 | acpi_lock_hp_context(); | |
ba574dc8 RW |
88 | hp->notify = notify; |
89 | hp->uevent = uevent; | |
90 | acpi_set_hp_context(adev, hp); | |
5d513205 RW |
91 | acpi_unlock_hp_context(); |
92 | } | |
93 | EXPORT_SYMBOL_GPL(acpi_initialize_hp_context); | |
94 | ||
ca589f94 RW |
95 | int acpi_scan_add_handler(struct acpi_scan_handler *handler) |
96 | { | |
d34afa9d | 97 | if (!handler) |
ca589f94 RW |
98 | return -EINVAL; |
99 | ||
100 | list_add_tail(&handler->list_node, &acpi_scan_handlers_list); | |
101 | return 0; | |
102 | } | |
103 | ||
3f8055c3 RW |
104 | int acpi_scan_add_handler_with_hotplug(struct acpi_scan_handler *handler, |
105 | const char *hotplug_profile_name) | |
106 | { | |
107 | int error; | |
108 | ||
109 | error = acpi_scan_add_handler(handler); | |
110 | if (error) | |
111 | return error; | |
112 | ||
113 | acpi_sysfs_add_hotplug_profile(&handler->hotplug, hotplug_profile_name); | |
114 | return 0; | |
115 | } | |
116 | ||
29b71a1c TR |
117 | /* |
118 | * Creates hid/cid(s) string needed for modalias and uevent | |
119 | * e.g. on a device with hid:IBM0001 and cid:ACPI0001 you get: | |
120 | * char *modalias: "acpi:IBM0001:ACPI0001" | |
3d8e0090 ZR |
121 | * Return: 0: no _HID and no _CID |
122 | * -EINVAL: output error | |
123 | * -ENOMEM: output is truncated | |
29b71a1c | 124 | */ |
b3e572d2 AB |
125 | static int create_modalias(struct acpi_device *acpi_dev, char *modalias, |
126 | int size) | |
127 | { | |
29b71a1c | 128 | int len; |
5c9fcb5d | 129 | int count; |
7f47fa6c | 130 | struct acpi_hardware_id *id; |
29b71a1c | 131 | |
2b2ae7c7 TR |
132 | if (list_empty(&acpi_dev->pnp.ids)) |
133 | return 0; | |
134 | ||
733e6251 MW |
135 | /* |
136 | * If the device has PRP0001 we expose DT compatible modalias | |
137 | * instead in form of of:NnameTCcompatible. | |
138 | */ | |
139 | if (acpi_dev->data.of_compatible) { | |
140 | struct acpi_buffer buf = { ACPI_ALLOCATE_BUFFER }; | |
141 | const union acpi_object *of_compatible, *obj; | |
142 | int i, nval; | |
143 | char *c; | |
144 | ||
145 | acpi_get_name(acpi_dev->handle, ACPI_SINGLE_NAME, &buf); | |
146 | /* DT strings are all in lower case */ | |
147 | for (c = buf.pointer; *c != '\0'; c++) | |
148 | *c = tolower(*c); | |
149 | ||
150 | len = snprintf(modalias, size, "of:N%sT", (char *)buf.pointer); | |
151 | ACPI_FREE(buf.pointer); | |
152 | ||
153 | of_compatible = acpi_dev->data.of_compatible; | |
154 | if (of_compatible->type == ACPI_TYPE_PACKAGE) { | |
155 | nval = of_compatible->package.count; | |
156 | obj = of_compatible->package.elements; | |
157 | } else { /* Must be ACPI_TYPE_STRING. */ | |
158 | nval = 1; | |
159 | obj = of_compatible; | |
160 | } | |
161 | for (i = 0; i < nval; i++, obj++) { | |
162 | count = snprintf(&modalias[len], size, "C%s", | |
163 | obj->string.pointer); | |
164 | if (count < 0) | |
165 | return -EINVAL; | |
166 | if (count >= size) | |
167 | return -ENOMEM; | |
168 | ||
169 | len += count; | |
170 | size -= count; | |
171 | } | |
172 | } else { | |
173 | len = snprintf(modalias, size, "acpi:"); | |
174 | size -= len; | |
175 | ||
176 | list_for_each_entry(id, &acpi_dev->pnp.ids, list) { | |
177 | count = snprintf(&modalias[len], size, "%s:", id->id); | |
178 | if (count < 0) | |
179 | return -EINVAL; | |
180 | if (count >= size) | |
181 | return -ENOMEM; | |
182 | len += count; | |
183 | size -= count; | |
184 | } | |
5c9fcb5d ZR |
185 | } |
186 | ||
29b71a1c TR |
187 | modalias[len] = '\0'; |
188 | return len; | |
189 | } | |
190 | ||
52870786 MW |
191 | /* |
192 | * acpi_companion_match() - Can we match via ACPI companion device | |
193 | * @dev: Device in question | |
194 | * | |
195 | * Check if the given device has an ACPI companion and if that companion has | |
196 | * a valid list of PNP IDs, and if the device is the first (primary) physical | |
197 | * device associated with it. | |
198 | * | |
199 | * If multiple physical devices are attached to a single ACPI companion, we need | |
200 | * to be careful. The usage scenario for this kind of relationship is that all | |
201 | * of the physical devices in question use resources provided by the ACPI | |
202 | * companion. A typical case is an MFD device where all the sub-devices share | |
203 | * the parent's ACPI companion. In such cases we can only allow the primary | |
204 | * (first) physical device to be matched with the help of the companion's PNP | |
205 | * IDs. | |
206 | * | |
207 | * Additional physical devices sharing the ACPI companion can still use | |
208 | * resources available from it but they will be matched normally using functions | |
209 | * provided by their bus types (and analogously for their modalias). | |
210 | */ | |
211 | static bool acpi_companion_match(const struct device *dev) | |
212 | { | |
213 | struct acpi_device *adev; | |
214 | bool ret; | |
215 | ||
216 | adev = ACPI_COMPANION(dev); | |
217 | if (!adev) | |
218 | return false; | |
219 | ||
220 | if (list_empty(&adev->pnp.ids)) | |
221 | return false; | |
222 | ||
223 | mutex_lock(&adev->physical_node_lock); | |
224 | if (list_empty(&adev->physical_node_list)) { | |
225 | ret = false; | |
226 | } else { | |
227 | const struct acpi_device_physical_node *node; | |
228 | ||
229 | node = list_first_entry(&adev->physical_node_list, | |
230 | struct acpi_device_physical_node, node); | |
231 | ret = node->dev == dev; | |
232 | } | |
233 | mutex_unlock(&adev->physical_node_lock); | |
234 | ||
235 | return ret; | |
236 | } | |
237 | ||
6eb2451f ZR |
238 | /* |
239 | * Creates uevent modalias field for ACPI enumerated devices. | |
240 | * Because the other buses does not support ACPI HIDs & CIDs. | |
241 | * e.g. for a device with hid:IBM0001 and cid:ACPI0001 you get: | |
242 | * "acpi:IBM0001:ACPI0001" | |
243 | */ | |
244 | int acpi_device_uevent_modalias(struct device *dev, struct kobj_uevent_env *env) | |
245 | { | |
6eb2451f ZR |
246 | int len; |
247 | ||
52870786 | 248 | if (!acpi_companion_match(dev)) |
6eb2451f ZR |
249 | return -ENODEV; |
250 | ||
251 | if (add_uevent_var(env, "MODALIAS=")) | |
252 | return -ENOMEM; | |
52870786 | 253 | len = create_modalias(ACPI_COMPANION(dev), &env->buf[env->buflen - 1], |
6eb2451f ZR |
254 | sizeof(env->buf) - env->buflen); |
255 | if (len <= 0) | |
256 | return len; | |
257 | env->buflen += len; | |
258 | return 0; | |
259 | } | |
260 | EXPORT_SYMBOL_GPL(acpi_device_uevent_modalias); | |
261 | ||
262 | /* | |
263 | * Creates modalias sysfs attribute for ACPI enumerated devices. | |
264 | * Because the other buses does not support ACPI HIDs & CIDs. | |
265 | * e.g. for a device with hid:IBM0001 and cid:ACPI0001 you get: | |
266 | * "acpi:IBM0001:ACPI0001" | |
267 | */ | |
268 | int acpi_device_modalias(struct device *dev, char *buf, int size) | |
269 | { | |
6eb2451f ZR |
270 | int len; |
271 | ||
52870786 | 272 | if (!acpi_companion_match(dev)) |
6eb2451f ZR |
273 | return -ENODEV; |
274 | ||
52870786 | 275 | len = create_modalias(ACPI_COMPANION(dev), buf, size -1); |
6eb2451f ZR |
276 | if (len <= 0) |
277 | return len; | |
278 | buf[len++] = '\n'; | |
279 | return len; | |
280 | } | |
281 | EXPORT_SYMBOL_GPL(acpi_device_modalias); | |
282 | ||
29b71a1c TR |
283 | static ssize_t |
284 | acpi_device_modalias_show(struct device *dev, struct device_attribute *attr, char *buf) { | |
285 | struct acpi_device *acpi_dev = to_acpi_device(dev); | |
286 | int len; | |
287 | ||
29b71a1c TR |
288 | len = create_modalias(acpi_dev, buf, 1024); |
289 | if (len <= 0) | |
3d8e0090 | 290 | return len; |
29b71a1c TR |
291 | buf[len++] = '\n'; |
292 | return len; | |
293 | } | |
294 | static DEVICE_ATTR(modalias, 0444, acpi_device_modalias_show, NULL); | |
295 | ||
caa73ea1 | 296 | bool acpi_scan_is_offline(struct acpi_device *adev, bool uevent) |
d22ddcbc RW |
297 | { |
298 | struct acpi_device_physical_node *pn; | |
299 | bool offline = true; | |
300 | ||
301 | mutex_lock(&adev->physical_node_lock); | |
302 | ||
303 | list_for_each_entry(pn, &adev->physical_node_list, node) | |
304 | if (device_supports_offline(pn->dev) && !pn->dev->offline) { | |
caa73ea1 RW |
305 | if (uevent) |
306 | kobject_uevent(&pn->dev->kobj, KOBJ_CHANGE); | |
307 | ||
d22ddcbc RW |
308 | offline = false; |
309 | break; | |
310 | } | |
311 | ||
312 | mutex_unlock(&adev->physical_node_lock); | |
313 | return offline; | |
314 | } | |
315 | ||
7f28ddec RW |
316 | static acpi_status acpi_bus_offline(acpi_handle handle, u32 lvl, void *data, |
317 | void **ret_p) | |
683058e3 RW |
318 | { |
319 | struct acpi_device *device = NULL; | |
320 | struct acpi_device_physical_node *pn; | |
303bfdb1 | 321 | bool second_pass = (bool)data; |
683058e3 RW |
322 | acpi_status status = AE_OK; |
323 | ||
324 | if (acpi_bus_get_device(handle, &device)) | |
325 | return AE_OK; | |
326 | ||
7f28ddec RW |
327 | if (device->handler && !device->handler->hotplug.enabled) { |
328 | *ret_p = &device->dev; | |
329 | return AE_SUPPORT; | |
330 | } | |
331 | ||
683058e3 RW |
332 | mutex_lock(&device->physical_node_lock); |
333 | ||
334 | list_for_each_entry(pn, &device->physical_node_list, node) { | |
335 | int ret; | |
336 | ||
303bfdb1 RW |
337 | if (second_pass) { |
338 | /* Skip devices offlined by the first pass. */ | |
339 | if (pn->put_online) | |
340 | continue; | |
341 | } else { | |
342 | pn->put_online = false; | |
343 | } | |
683058e3 RW |
344 | ret = device_offline(pn->dev); |
345 | if (acpi_force_hot_remove) | |
346 | continue; | |
347 | ||
303bfdb1 RW |
348 | if (ret >= 0) { |
349 | pn->put_online = !ret; | |
350 | } else { | |
351 | *ret_p = pn->dev; | |
352 | if (second_pass) { | |
353 | status = AE_ERROR; | |
354 | break; | |
355 | } | |
683058e3 | 356 | } |
683058e3 RW |
357 | } |
358 | ||
359 | mutex_unlock(&device->physical_node_lock); | |
360 | ||
361 | return status; | |
362 | } | |
363 | ||
7f28ddec RW |
364 | static acpi_status acpi_bus_online(acpi_handle handle, u32 lvl, void *data, |
365 | void **ret_p) | |
683058e3 RW |
366 | { |
367 | struct acpi_device *device = NULL; | |
368 | struct acpi_device_physical_node *pn; | |
369 | ||
370 | if (acpi_bus_get_device(handle, &device)) | |
371 | return AE_OK; | |
372 | ||
373 | mutex_lock(&device->physical_node_lock); | |
374 | ||
375 | list_for_each_entry(pn, &device->physical_node_list, node) | |
376 | if (pn->put_online) { | |
377 | device_online(pn->dev); | |
378 | pn->put_online = false; | |
379 | } | |
380 | ||
381 | mutex_unlock(&device->physical_node_lock); | |
382 | ||
383 | return AE_OK; | |
384 | } | |
385 | ||
d22ddcbc | 386 | static int acpi_scan_try_to_offline(struct acpi_device *device) |
1da177e4 | 387 | { |
5993c467 | 388 | acpi_handle handle = device->handle; |
d22ddcbc | 389 | struct device *errdev = NULL; |
a33ec399 | 390 | acpi_status status; |
f058cdf4 | 391 | |
303bfdb1 RW |
392 | /* |
393 | * Carry out two passes here and ignore errors in the first pass, | |
394 | * because if the devices in question are memory blocks and | |
395 | * CONFIG_MEMCG is set, one of the blocks may hold data structures | |
396 | * that the other blocks depend on, but it is not known in advance which | |
397 | * block holds them. | |
398 | * | |
399 | * If the first pass is successful, the second one isn't needed, though. | |
400 | */ | |
7f28ddec RW |
401 | status = acpi_walk_namespace(ACPI_TYPE_ANY, handle, ACPI_UINT32_MAX, |
402 | NULL, acpi_bus_offline, (void *)false, | |
403 | (void **)&errdev); | |
404 | if (status == AE_SUPPORT) { | |
405 | dev_warn(errdev, "Offline disabled.\n"); | |
406 | acpi_walk_namespace(ACPI_TYPE_ANY, handle, ACPI_UINT32_MAX, | |
407 | acpi_bus_online, NULL, NULL, NULL); | |
7f28ddec RW |
408 | return -EPERM; |
409 | } | |
410 | acpi_bus_offline(handle, 0, (void *)false, (void **)&errdev); | |
303bfdb1 RW |
411 | if (errdev) { |
412 | errdev = NULL; | |
683058e3 | 413 | acpi_walk_namespace(ACPI_TYPE_ANY, handle, ACPI_UINT32_MAX, |
7f28ddec RW |
414 | NULL, acpi_bus_offline, (void *)true, |
415 | (void **)&errdev); | |
303bfdb1 | 416 | if (!errdev || acpi_force_hot_remove) |
7f28ddec RW |
417 | acpi_bus_offline(handle, 0, (void *)true, |
418 | (void **)&errdev); | |
303bfdb1 RW |
419 | |
420 | if (errdev && !acpi_force_hot_remove) { | |
421 | dev_warn(errdev, "Offline failed.\n"); | |
7f28ddec | 422 | acpi_bus_online(handle, 0, NULL, NULL); |
303bfdb1 | 423 | acpi_walk_namespace(ACPI_TYPE_ANY, handle, |
7f28ddec RW |
424 | ACPI_UINT32_MAX, acpi_bus_online, |
425 | NULL, NULL, NULL); | |
303bfdb1 RW |
426 | return -EBUSY; |
427 | } | |
683058e3 | 428 | } |
d22ddcbc RW |
429 | return 0; |
430 | } | |
431 | ||
432 | static int acpi_scan_hot_remove(struct acpi_device *device) | |
433 | { | |
434 | acpi_handle handle = device->handle; | |
435 | unsigned long long sta; | |
436 | acpi_status status; | |
437 | ||
dee15926 TC |
438 | if (device->handler && device->handler->hotplug.demand_offline |
439 | && !acpi_force_hot_remove) { | |
caa73ea1 | 440 | if (!acpi_scan_is_offline(device, true)) |
d22ddcbc RW |
441 | return -EBUSY; |
442 | } else { | |
443 | int error = acpi_scan_try_to_offline(device); | |
444 | if (error) | |
445 | return error; | |
446 | } | |
683058e3 | 447 | |
26d46867 | 448 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
0794469d | 449 | "Hot-removing device %s...\n", dev_name(&device->dev))); |
26d46867 | 450 | |
bfee26db | 451 | acpi_bus_trim(device); |
683058e3 | 452 | |
7d2421f8 | 453 | acpi_evaluate_lck(handle, 0); |
1da177e4 LT |
454 | /* |
455 | * TBD: _EJD support. | |
456 | */ | |
7d2421f8 JL |
457 | status = acpi_evaluate_ej0(handle); |
458 | if (status == AE_NOT_FOUND) | |
459 | return -ENODEV; | |
460 | else if (ACPI_FAILURE(status)) | |
461 | return -EIO; | |
1da177e4 | 462 | |
882fd12e TK |
463 | /* |
464 | * Verify if eject was indeed successful. If not, log an error | |
465 | * message. No need to call _OST since _EJ0 call was made OK. | |
466 | */ | |
467 | status = acpi_evaluate_integer(handle, "_STA", NULL, &sta); | |
468 | if (ACPI_FAILURE(status)) { | |
469 | acpi_handle_warn(handle, | |
470 | "Status check after eject failed (0x%x)\n", status); | |
471 | } else if (sta & ACPI_STA_DEVICE_ENABLED) { | |
472 | acpi_handle_warn(handle, | |
473 | "Eject incomplete - status 0x%llx\n", sta); | |
474 | } | |
475 | ||
a33ec399 RW |
476 | return 0; |
477 | } | |
1da177e4 | 478 | |
443fc820 RW |
479 | static int acpi_scan_device_not_present(struct acpi_device *adev) |
480 | { | |
481 | if (!acpi_device_enumerated(adev)) { | |
482 | dev_warn(&adev->dev, "Still not present\n"); | |
483 | return -EALREADY; | |
484 | } | |
485 | acpi_bus_trim(adev); | |
486 | return 0; | |
487 | } | |
488 | ||
c27b2c33 | 489 | static int acpi_scan_device_check(struct acpi_device *adev) |
a33ec399 | 490 | { |
f943db40 | 491 | int error; |
a33ec399 | 492 | |
443fc820 RW |
493 | acpi_bus_get_status(adev); |
494 | if (adev->status.present || adev->status.functional) { | |
495 | /* | |
496 | * This function is only called for device objects for which | |
497 | * matching scan handlers exist. The only situation in which | |
498 | * the scan handler is not attached to this device object yet | |
499 | * is when the device has just appeared (either it wasn't | |
500 | * present at all before or it was removed and then added | |
501 | * again). | |
502 | */ | |
503 | if (adev->handler) { | |
504 | dev_warn(&adev->dev, "Already enumerated\n"); | |
505 | return -EALREADY; | |
506 | } | |
507 | error = acpi_bus_scan(adev->handle); | |
508 | if (error) { | |
509 | dev_warn(&adev->dev, "Namespace scan failure\n"); | |
510 | return error; | |
511 | } | |
512 | if (!adev->handler) { | |
513 | dev_warn(&adev->dev, "Enumeration failure\n"); | |
514 | error = -ENODEV; | |
515 | } | |
516 | } else { | |
517 | error = acpi_scan_device_not_present(adev); | |
518 | } | |
519 | return error; | |
520 | } | |
521 | ||
522 | static int acpi_scan_bus_check(struct acpi_device *adev) | |
523 | { | |
524 | struct acpi_scan_handler *handler = adev->handler; | |
525 | struct acpi_device *child; | |
526 | int error; | |
527 | ||
528 | acpi_bus_get_status(adev); | |
529 | if (!(adev->status.present || adev->status.functional)) { | |
530 | acpi_scan_device_not_present(adev); | |
531 | return 0; | |
532 | } | |
533 | if (handler && handler->hotplug.scan_dependent) | |
534 | return handler->hotplug.scan_dependent(adev); | |
535 | ||
c27b2c33 RW |
536 | error = acpi_bus_scan(adev->handle); |
537 | if (error) { | |
538 | dev_warn(&adev->dev, "Namespace scan failure\n"); | |
539 | return error; | |
540 | } | |
443fc820 RW |
541 | list_for_each_entry(child, &adev->children, node) { |
542 | error = acpi_scan_bus_check(child); | |
543 | if (error) | |
544 | return error; | |
c27b2c33 RW |
545 | } |
546 | return 0; | |
a33ec399 RW |
547 | } |
548 | ||
3c2cc7ff RW |
549 | static int acpi_generic_hotplug_event(struct acpi_device *adev, u32 type) |
550 | { | |
551 | switch (type) { | |
552 | case ACPI_NOTIFY_BUS_CHECK: | |
553 | return acpi_scan_bus_check(adev); | |
554 | case ACPI_NOTIFY_DEVICE_CHECK: | |
555 | return acpi_scan_device_check(adev); | |
556 | case ACPI_NOTIFY_EJECT_REQUEST: | |
557 | case ACPI_OST_EC_OSPM_EJECT: | |
dd2151be RW |
558 | if (adev->handler && !adev->handler->hotplug.enabled) { |
559 | dev_info(&adev->dev, "Eject disabled\n"); | |
560 | return -EPERM; | |
561 | } | |
700b8422 RW |
562 | acpi_evaluate_ost(adev->handle, ACPI_NOTIFY_EJECT_REQUEST, |
563 | ACPI_OST_SC_EJECT_IN_PROGRESS, NULL); | |
3c2cc7ff RW |
564 | return acpi_scan_hot_remove(adev); |
565 | } | |
566 | return -EINVAL; | |
567 | } | |
568 | ||
1e3bcb59 | 569 | void acpi_device_hotplug(struct acpi_device *adev, u32 src) |
a33ec399 | 570 | { |
a33ec399 | 571 | u32 ost_code = ACPI_OST_SC_NON_SPECIFIC_FAILURE; |
3c2cc7ff | 572 | int error = -ENODEV; |
a33ec399 | 573 | |
683058e3 | 574 | lock_device_hotplug(); |
e0ae8fee | 575 | mutex_lock(&acpi_scan_lock); |
a33ec399 | 576 | |
c27b2c33 RW |
577 | /* |
578 | * The device object's ACPI handle cannot become invalid as long as we | |
3c2cc7ff | 579 | * are holding acpi_scan_lock, but it might have become invalid before |
c27b2c33 RW |
580 | * that lock was acquired. |
581 | */ | |
582 | if (adev->handle == INVALID_ACPI_HANDLE) | |
3c2cc7ff | 583 | goto err_out; |
c27b2c33 | 584 | |
1e2380cd RW |
585 | if (adev->flags.is_dock_station) { |
586 | error = dock_notify(adev, src); | |
587 | } else if (adev->flags.hotplug_notify) { | |
3c2cc7ff | 588 | error = acpi_generic_hotplug_event(adev, src); |
dd2151be RW |
589 | if (error == -EPERM) { |
590 | ost_code = ACPI_OST_SC_EJECT_NOT_SUPPORTED; | |
591 | goto err_out; | |
592 | } | |
3c2cc7ff | 593 | } else { |
be27b3dc | 594 | int (*notify)(struct acpi_device *, u32); |
3c2cc7ff RW |
595 | |
596 | acpi_lock_hp_context(); | |
be27b3dc | 597 | notify = adev->hp ? adev->hp->notify : NULL; |
3c2cc7ff RW |
598 | acpi_unlock_hp_context(); |
599 | /* | |
600 | * There may be additional notify handlers for device objects | |
601 | * without the .event() callback, so ignore them here. | |
602 | */ | |
be27b3dc RW |
603 | if (notify) |
604 | error = notify(adev, src); | |
3c2cc7ff RW |
605 | else |
606 | goto out; | |
a33ec399 | 607 | } |
c27b2c33 RW |
608 | if (!error) |
609 | ost_code = ACPI_OST_SC_SUCCESS; | |
a33ec399 | 610 | |
3c2cc7ff | 611 | err_out: |
700b8422 | 612 | acpi_evaluate_ost(adev->handle, src, ost_code, NULL); |
3c2cc7ff RW |
613 | |
614 | out: | |
78ea4639 | 615 | acpi_bus_put_acpi_device(adev); |
a33ec399 | 616 | mutex_unlock(&acpi_scan_lock); |
e0ae8fee | 617 | unlock_device_hotplug(); |
a33ec399 RW |
618 | } |
619 | ||
836aedb1 RW |
620 | static ssize_t real_power_state_show(struct device *dev, |
621 | struct device_attribute *attr, char *buf) | |
622 | { | |
623 | struct acpi_device *adev = to_acpi_device(dev); | |
624 | int state; | |
625 | int ret; | |
626 | ||
627 | ret = acpi_device_get_power(adev, &state); | |
628 | if (ret) | |
629 | return ret; | |
630 | ||
631 | return sprintf(buf, "%s\n", acpi_power_state_string(state)); | |
632 | } | |
633 | ||
634 | static DEVICE_ATTR(real_power_state, 0444, real_power_state_show, NULL); | |
635 | ||
636 | static ssize_t power_state_show(struct device *dev, | |
637 | struct device_attribute *attr, char *buf) | |
638 | { | |
639 | struct acpi_device *adev = to_acpi_device(dev); | |
640 | ||
641 | return sprintf(buf, "%s\n", acpi_power_state_string(adev->power.state)); | |
642 | } | |
643 | ||
644 | static DEVICE_ATTR(power_state, 0444, power_state_show, NULL); | |
645 | ||
1da177e4 | 646 | static ssize_t |
f883d9db PM |
647 | acpi_eject_store(struct device *d, struct device_attribute *attr, |
648 | const char *buf, size_t count) | |
1da177e4 | 649 | { |
f883d9db | 650 | struct acpi_device *acpi_device = to_acpi_device(d); |
a33ec399 RW |
651 | acpi_object_type not_used; |
652 | acpi_status status; | |
1da177e4 | 653 | |
a33ec399 | 654 | if (!count || buf[0] != '1') |
1da177e4 | 655 | return -EINVAL; |
1da177e4 | 656 | |
a33ec399 RW |
657 | if ((!acpi_device->handler || !acpi_device->handler->hotplug.enabled) |
658 | && !acpi_device->driver) | |
659 | return -ENODEV; | |
660 | ||
661 | status = acpi_get_type(acpi_device->handle, ¬_used); | |
662 | if (ACPI_FAILURE(status) || !acpi_device->flags.ejectable) | |
663 | return -ENODEV; | |
664 | ||
a33ec399 | 665 | get_device(&acpi_device->dev); |
1e3bcb59 | 666 | status = acpi_hotplug_schedule(acpi_device, ACPI_OST_EC_OSPM_EJECT); |
f943db40 RW |
667 | if (ACPI_SUCCESS(status)) |
668 | return count; | |
a33ec399 | 669 | |
f943db40 | 670 | put_device(&acpi_device->dev); |
700b8422 RW |
671 | acpi_evaluate_ost(acpi_device->handle, ACPI_OST_EC_OSPM_EJECT, |
672 | ACPI_OST_SC_NON_SPECIFIC_FAILURE, NULL); | |
5add99cf | 673 | return status == AE_NO_MEMORY ? -ENOMEM : -EAGAIN; |
1da177e4 LT |
674 | } |
675 | ||
f883d9db | 676 | static DEVICE_ATTR(eject, 0200, NULL, acpi_eject_store); |
1da177e4 | 677 | |
e49bd2dd ZR |
678 | static ssize_t |
679 | acpi_device_hid_show(struct device *dev, struct device_attribute *attr, char *buf) { | |
680 | struct acpi_device *acpi_dev = to_acpi_device(dev); | |
1da177e4 | 681 | |
ea8d82fd | 682 | return sprintf(buf, "%s\n", acpi_device_hid(acpi_dev)); |
1da177e4 | 683 | } |
e49bd2dd | 684 | static DEVICE_ATTR(hid, 0444, acpi_device_hid_show, NULL); |
1da177e4 | 685 | |
923d4a45 LZ |
686 | static ssize_t acpi_device_uid_show(struct device *dev, |
687 | struct device_attribute *attr, char *buf) | |
688 | { | |
689 | struct acpi_device *acpi_dev = to_acpi_device(dev); | |
690 | ||
691 | return sprintf(buf, "%s\n", acpi_dev->pnp.unique_id); | |
692 | } | |
693 | static DEVICE_ATTR(uid, 0444, acpi_device_uid_show, NULL); | |
694 | ||
695 | static ssize_t acpi_device_adr_show(struct device *dev, | |
696 | struct device_attribute *attr, char *buf) | |
697 | { | |
698 | struct acpi_device *acpi_dev = to_acpi_device(dev); | |
699 | ||
700 | return sprintf(buf, "0x%08x\n", | |
701 | (unsigned int)(acpi_dev->pnp.bus_address)); | |
702 | } | |
703 | static DEVICE_ATTR(adr, 0444, acpi_device_adr_show, NULL); | |
704 | ||
e49bd2dd ZR |
705 | static ssize_t |
706 | acpi_device_path_show(struct device *dev, struct device_attribute *attr, char *buf) { | |
707 | struct acpi_device *acpi_dev = to_acpi_device(dev); | |
708 | struct acpi_buffer path = {ACPI_ALLOCATE_BUFFER, NULL}; | |
709 | int result; | |
1da177e4 | 710 | |
e49bd2dd | 711 | result = acpi_get_name(acpi_dev->handle, ACPI_FULL_PATHNAME, &path); |
0c526d96 | 712 | if (result) |
e49bd2dd | 713 | goto end; |
1da177e4 | 714 | |
e49bd2dd ZR |
715 | result = sprintf(buf, "%s\n", (char*)path.pointer); |
716 | kfree(path.pointer); | |
0c526d96 | 717 | end: |
e49bd2dd | 718 | return result; |
1da177e4 | 719 | } |
e49bd2dd | 720 | static DEVICE_ATTR(path, 0444, acpi_device_path_show, NULL); |
1da177e4 | 721 | |
d1efe3c3 LO |
722 | /* sysfs file that shows description text from the ACPI _STR method */ |
723 | static ssize_t description_show(struct device *dev, | |
724 | struct device_attribute *attr, | |
725 | char *buf) { | |
726 | struct acpi_device *acpi_dev = to_acpi_device(dev); | |
727 | int result; | |
728 | ||
729 | if (acpi_dev->pnp.str_obj == NULL) | |
730 | return 0; | |
731 | ||
732 | /* | |
733 | * The _STR object contains a Unicode identifier for a device. | |
734 | * We need to convert to utf-8 so it can be displayed. | |
735 | */ | |
736 | result = utf16s_to_utf8s( | |
737 | (wchar_t *)acpi_dev->pnp.str_obj->buffer.pointer, | |
738 | acpi_dev->pnp.str_obj->buffer.length, | |
739 | UTF16_LITTLE_ENDIAN, buf, | |
740 | PAGE_SIZE); | |
741 | ||
742 | buf[result++] = '\n'; | |
743 | ||
744 | return result; | |
745 | } | |
746 | static DEVICE_ATTR(description, 0444, description_show, NULL); | |
747 | ||
bb74ac23 YI |
748 | static ssize_t |
749 | acpi_device_sun_show(struct device *dev, struct device_attribute *attr, | |
750 | char *buf) { | |
751 | struct acpi_device *acpi_dev = to_acpi_device(dev); | |
a383b68d YI |
752 | acpi_status status; |
753 | unsigned long long sun; | |
bb74ac23 | 754 | |
a383b68d YI |
755 | status = acpi_evaluate_integer(acpi_dev->handle, "_SUN", NULL, &sun); |
756 | if (ACPI_FAILURE(status)) | |
757 | return -ENODEV; | |
758 | ||
759 | return sprintf(buf, "%llu\n", sun); | |
bb74ac23 YI |
760 | } |
761 | static DEVICE_ATTR(sun, 0444, acpi_device_sun_show, NULL); | |
762 | ||
c713cd7f SP |
763 | static ssize_t status_show(struct device *dev, struct device_attribute *attr, |
764 | char *buf) { | |
765 | struct acpi_device *acpi_dev = to_acpi_device(dev); | |
766 | acpi_status status; | |
767 | unsigned long long sta; | |
768 | ||
769 | status = acpi_evaluate_integer(acpi_dev->handle, "_STA", NULL, &sta); | |
770 | if (ACPI_FAILURE(status)) | |
771 | return -ENODEV; | |
772 | ||
773 | return sprintf(buf, "%llu\n", sta); | |
774 | } | |
775 | static DEVICE_ATTR_RO(status); | |
776 | ||
e49bd2dd | 777 | static int acpi_device_setup_files(struct acpi_device *dev) |
1da177e4 | 778 | { |
d1efe3c3 | 779 | struct acpi_buffer buffer = {ACPI_ALLOCATE_BUFFER, NULL}; |
f883d9db | 780 | acpi_status status; |
e49bd2dd | 781 | int result = 0; |
1da177e4 LT |
782 | |
783 | /* | |
e49bd2dd | 784 | * Devices gotten from FADT don't have a "path" attribute |
1da177e4 | 785 | */ |
0c526d96 | 786 | if (dev->handle) { |
e49bd2dd | 787 | result = device_create_file(&dev->dev, &dev_attr_path); |
0c526d96 | 788 | if (result) |
e49bd2dd | 789 | goto end; |
1da177e4 LT |
790 | } |
791 | ||
2b2ae7c7 TR |
792 | if (!list_empty(&dev->pnp.ids)) { |
793 | result = device_create_file(&dev->dev, &dev_attr_hid); | |
794 | if (result) | |
795 | goto end; | |
1da177e4 | 796 | |
2b2ae7c7 TR |
797 | result = device_create_file(&dev->dev, &dev_attr_modalias); |
798 | if (result) | |
799 | goto end; | |
800 | } | |
29b71a1c | 801 | |
d1efe3c3 LO |
802 | /* |
803 | * If device has _STR, 'description' file is created | |
804 | */ | |
952c63e9 | 805 | if (acpi_has_method(dev->handle, "_STR")) { |
d1efe3c3 LO |
806 | status = acpi_evaluate_object(dev->handle, "_STR", |
807 | NULL, &buffer); | |
808 | if (ACPI_FAILURE(status)) | |
809 | buffer.pointer = NULL; | |
810 | dev->pnp.str_obj = buffer.pointer; | |
811 | result = device_create_file(&dev->dev, &dev_attr_description); | |
812 | if (result) | |
813 | goto end; | |
814 | } | |
815 | ||
d4e1a692 | 816 | if (dev->pnp.type.bus_address) |
923d4a45 LZ |
817 | result = device_create_file(&dev->dev, &dev_attr_adr); |
818 | if (dev->pnp.unique_id) | |
819 | result = device_create_file(&dev->dev, &dev_attr_uid); | |
820 | ||
a383b68d | 821 | if (acpi_has_method(dev->handle, "_SUN")) { |
bb74ac23 YI |
822 | result = device_create_file(&dev->dev, &dev_attr_sun); |
823 | if (result) | |
824 | goto end; | |
bb74ac23 YI |
825 | } |
826 | ||
c713cd7f SP |
827 | if (acpi_has_method(dev->handle, "_STA")) { |
828 | result = device_create_file(&dev->dev, &dev_attr_status); | |
829 | if (result) | |
830 | goto end; | |
831 | } | |
832 | ||
e49bd2dd ZR |
833 | /* |
834 | * If device has _EJ0, 'eject' file is created that is used to trigger | |
835 | * hot-removal function from userland. | |
836 | */ | |
952c63e9 | 837 | if (acpi_has_method(dev->handle, "_EJ0")) { |
e49bd2dd | 838 | result = device_create_file(&dev->dev, &dev_attr_eject); |
836aedb1 RW |
839 | if (result) |
840 | return result; | |
841 | } | |
842 | ||
843 | if (dev->flags.power_manageable) { | |
844 | result = device_create_file(&dev->dev, &dev_attr_power_state); | |
845 | if (result) | |
846 | return result; | |
847 | ||
848 | if (dev->power.flags.power_resources) | |
849 | result = device_create_file(&dev->dev, | |
850 | &dev_attr_real_power_state); | |
851 | } | |
852 | ||
0c526d96 | 853 | end: |
e49bd2dd | 854 | return result; |
1da177e4 LT |
855 | } |
856 | ||
f883d9db | 857 | static void acpi_device_remove_files(struct acpi_device *dev) |
1da177e4 | 858 | { |
836aedb1 RW |
859 | if (dev->flags.power_manageable) { |
860 | device_remove_file(&dev->dev, &dev_attr_power_state); | |
861 | if (dev->power.flags.power_resources) | |
862 | device_remove_file(&dev->dev, | |
863 | &dev_attr_real_power_state); | |
864 | } | |
865 | ||
f883d9db | 866 | /* |
d1efe3c3 LO |
867 | * If device has _STR, remove 'description' file |
868 | */ | |
952c63e9 | 869 | if (acpi_has_method(dev->handle, "_STR")) { |
d1efe3c3 LO |
870 | kfree(dev->pnp.str_obj); |
871 | device_remove_file(&dev->dev, &dev_attr_description); | |
872 | } | |
873 | /* | |
874 | * If device has _EJ0, remove 'eject' file. | |
f883d9db | 875 | */ |
952c63e9 | 876 | if (acpi_has_method(dev->handle, "_EJ0")) |
f883d9db | 877 | device_remove_file(&dev->dev, &dev_attr_eject); |
1da177e4 | 878 | |
952c63e9 | 879 | if (acpi_has_method(dev->handle, "_SUN")) |
bb74ac23 YI |
880 | device_remove_file(&dev->dev, &dev_attr_sun); |
881 | ||
923d4a45 LZ |
882 | if (dev->pnp.unique_id) |
883 | device_remove_file(&dev->dev, &dev_attr_uid); | |
d4e1a692 | 884 | if (dev->pnp.type.bus_address) |
923d4a45 | 885 | device_remove_file(&dev->dev, &dev_attr_adr); |
1131b938 BH |
886 | device_remove_file(&dev->dev, &dev_attr_modalias); |
887 | device_remove_file(&dev->dev, &dev_attr_hid); | |
c713cd7f SP |
888 | if (acpi_has_method(dev->handle, "_STA")) |
889 | device_remove_file(&dev->dev, &dev_attr_status); | |
0c526d96 | 890 | if (dev->handle) |
e49bd2dd | 891 | device_remove_file(&dev->dev, &dev_attr_path); |
1da177e4 | 892 | } |
1da177e4 | 893 | /* -------------------------------------------------------------------------- |
9e89dde2 | 894 | ACPI Bus operations |
1da177e4 | 895 | -------------------------------------------------------------------------- */ |
29b71a1c | 896 | |
cf761af9 MW |
897 | static const struct acpi_device_id *__acpi_match_device( |
898 | struct acpi_device *device, const struct acpi_device_id *ids) | |
29b71a1c TR |
899 | { |
900 | const struct acpi_device_id *id; | |
7f47fa6c | 901 | struct acpi_hardware_id *hwid; |
29b71a1c | 902 | |
39a0ad87 ZY |
903 | /* |
904 | * If the device is not present, it is unnecessary to load device | |
905 | * driver for it. | |
906 | */ | |
907 | if (!device->status.present) | |
cf761af9 | 908 | return NULL; |
39a0ad87 | 909 | |
7f47fa6c BH |
910 | for (id = ids; id->id[0]; id++) |
911 | list_for_each_entry(hwid, &device->pnp.ids, list) | |
912 | if (!strcmp((char *) id->id, hwid->id)) | |
cf761af9 MW |
913 | return id; |
914 | ||
915 | return NULL; | |
916 | } | |
917 | ||
918 | /** | |
919 | * acpi_match_device - Match a struct device against a given list of ACPI IDs | |
920 | * @ids: Array of struct acpi_device_id object to match against. | |
921 | * @dev: The device structure to match. | |
922 | * | |
923 | * Check if @dev has a valid ACPI handle and if there is a struct acpi_device | |
924 | * object for that handle and use that object to match against a given list of | |
925 | * device IDs. | |
926 | * | |
927 | * Return a pointer to the first matching ID on success or %NULL on failure. | |
928 | */ | |
929 | const struct acpi_device_id *acpi_match_device(const struct acpi_device_id *ids, | |
930 | const struct device *dev) | |
931 | { | |
932 | struct acpi_device *adev; | |
0613e1f7 | 933 | acpi_handle handle = ACPI_HANDLE(dev); |
cf761af9 | 934 | |
0613e1f7 | 935 | if (!ids || !handle || acpi_bus_get_device(handle, &adev)) |
cf761af9 MW |
936 | return NULL; |
937 | ||
52870786 MW |
938 | if (!acpi_companion_match(dev)) |
939 | return NULL; | |
940 | ||
cf761af9 MW |
941 | return __acpi_match_device(adev, ids); |
942 | } | |
943 | EXPORT_SYMBOL_GPL(acpi_match_device); | |
29b71a1c | 944 | |
cf761af9 MW |
945 | int acpi_match_device_ids(struct acpi_device *device, |
946 | const struct acpi_device_id *ids) | |
947 | { | |
948 | return __acpi_match_device(device, ids) ? 0 : -ENOENT; | |
29b71a1c TR |
949 | } |
950 | EXPORT_SYMBOL(acpi_match_device_ids); | |
951 | ||
733e6251 MW |
952 | /* Performs match against special "PRP0001" shoehorn ACPI ID */ |
953 | static bool acpi_of_driver_match_device(struct device *dev, | |
954 | const struct device_driver *drv) | |
955 | { | |
956 | const union acpi_object *of_compatible, *obj; | |
957 | struct acpi_device *adev; | |
958 | int i, nval; | |
959 | ||
960 | adev = ACPI_COMPANION(dev); | |
961 | if (!adev) | |
962 | return false; | |
963 | ||
964 | of_compatible = adev->data.of_compatible; | |
965 | if (!drv->of_match_table || !of_compatible) | |
966 | return false; | |
967 | ||
968 | if (of_compatible->type == ACPI_TYPE_PACKAGE) { | |
969 | nval = of_compatible->package.count; | |
970 | obj = of_compatible->package.elements; | |
971 | } else { /* Must be ACPI_TYPE_STRING. */ | |
972 | nval = 1; | |
973 | obj = of_compatible; | |
974 | } | |
975 | /* Now we can look for the driver DT compatible strings */ | |
976 | for (i = 0; i < nval; i++, obj++) { | |
977 | const struct of_device_id *id; | |
978 | ||
979 | for (id = drv->of_match_table; id->compatible[0]; id++) | |
980 | if (!strcasecmp(obj->string.pointer, id->compatible)) | |
981 | return true; | |
982 | } | |
983 | ||
984 | return false; | |
985 | } | |
986 | ||
987 | bool acpi_driver_match_device(struct device *dev, | |
988 | const struct device_driver *drv) | |
989 | { | |
990 | if (!drv->acpi_match_table) | |
991 | return acpi_of_driver_match_device(dev, drv); | |
992 | ||
993 | return !!acpi_match_device(drv->acpi_match_table, dev); | |
994 | } | |
995 | EXPORT_SYMBOL_GPL(acpi_driver_match_device); | |
996 | ||
0b224527 RW |
997 | static void acpi_free_power_resources_lists(struct acpi_device *device) |
998 | { | |
999 | int i; | |
1000 | ||
993cbe59 RW |
1001 | if (device->wakeup.flags.valid) |
1002 | acpi_power_resources_list_free(&device->wakeup.resources); | |
1003 | ||
1b1f3e16 | 1004 | if (!device->power.flags.power_resources) |
0b224527 RW |
1005 | return; |
1006 | ||
1007 | for (i = ACPI_STATE_D0; i <= ACPI_STATE_D3_HOT; i++) { | |
1008 | struct acpi_device_power_state *ps = &device->power.states[i]; | |
1009 | acpi_power_resources_list_free(&ps->resources); | |
1010 | } | |
7f47fa6c BH |
1011 | } |
1012 | ||
1890a97a | 1013 | static void acpi_device_release(struct device *dev) |
1da177e4 | 1014 | { |
1890a97a | 1015 | struct acpi_device *acpi_dev = to_acpi_device(dev); |
1da177e4 | 1016 | |
ffdcd955 | 1017 | acpi_free_properties(acpi_dev); |
c0af4175 | 1018 | acpi_free_pnp_ids(&acpi_dev->pnp); |
0b224527 | 1019 | acpi_free_power_resources_lists(acpi_dev); |
1890a97a | 1020 | kfree(acpi_dev); |
1da177e4 LT |
1021 | } |
1022 | ||
5d9464a4 | 1023 | static int acpi_bus_match(struct device *dev, struct device_driver *drv) |
9e89dde2 | 1024 | { |
5d9464a4 PM |
1025 | struct acpi_device *acpi_dev = to_acpi_device(dev); |
1026 | struct acpi_driver *acpi_drv = to_acpi_driver(drv); | |
1da177e4 | 1027 | |
209d3b17 | 1028 | return acpi_dev->flags.match_driver |
805d410f | 1029 | && !acpi_match_device_ids(acpi_dev, acpi_drv->ids); |
5d9464a4 | 1030 | } |
1da177e4 | 1031 | |
7eff2e7a | 1032 | static int acpi_device_uevent(struct device *dev, struct kobj_uevent_env *env) |
1da177e4 | 1033 | { |
5d9464a4 | 1034 | struct acpi_device *acpi_dev = to_acpi_device(dev); |
7eff2e7a | 1035 | int len; |
5d9464a4 | 1036 | |
2b2ae7c7 TR |
1037 | if (list_empty(&acpi_dev->pnp.ids)) |
1038 | return 0; | |
1039 | ||
7eff2e7a KS |
1040 | if (add_uevent_var(env, "MODALIAS=")) |
1041 | return -ENOMEM; | |
1042 | len = create_modalias(acpi_dev, &env->buf[env->buflen - 1], | |
1043 | sizeof(env->buf) - env->buflen); | |
3d8e0090 ZR |
1044 | if (len <= 0) |
1045 | return len; | |
7eff2e7a | 1046 | env->buflen += len; |
9e89dde2 | 1047 | return 0; |
1da177e4 LT |
1048 | } |
1049 | ||
46ec8598 BH |
1050 | static void acpi_device_notify(acpi_handle handle, u32 event, void *data) |
1051 | { | |
1052 | struct acpi_device *device = data; | |
1053 | ||
1054 | device->driver->ops.notify(device, event); | |
1055 | } | |
1056 | ||
236105db | 1057 | static void acpi_device_notify_fixed(void *data) |
46ec8598 BH |
1058 | { |
1059 | struct acpi_device *device = data; | |
1060 | ||
53de5356 BH |
1061 | /* Fixed hardware devices have no handles */ |
1062 | acpi_device_notify(NULL, ACPI_FIXED_HARDWARE_EVENT, device); | |
236105db LT |
1063 | } |
1064 | ||
1065 | static acpi_status acpi_device_fixed_event(void *data) | |
1066 | { | |
1067 | acpi_os_execute(OSL_NOTIFY_HANDLER, acpi_device_notify_fixed, data); | |
46ec8598 BH |
1068 | return AE_OK; |
1069 | } | |
1070 | ||
1071 | static int acpi_device_install_notify_handler(struct acpi_device *device) | |
1072 | { | |
1073 | acpi_status status; | |
46ec8598 | 1074 | |
ccba2a36 | 1075 | if (device->device_type == ACPI_BUS_TYPE_POWER_BUTTON) |
46ec8598 BH |
1076 | status = |
1077 | acpi_install_fixed_event_handler(ACPI_EVENT_POWER_BUTTON, | |
236105db | 1078 | acpi_device_fixed_event, |
46ec8598 | 1079 | device); |
ccba2a36 | 1080 | else if (device->device_type == ACPI_BUS_TYPE_SLEEP_BUTTON) |
46ec8598 BH |
1081 | status = |
1082 | acpi_install_fixed_event_handler(ACPI_EVENT_SLEEP_BUTTON, | |
236105db | 1083 | acpi_device_fixed_event, |
46ec8598 BH |
1084 | device); |
1085 | else | |
1086 | status = acpi_install_notify_handler(device->handle, | |
1087 | ACPI_DEVICE_NOTIFY, | |
1088 | acpi_device_notify, | |
1089 | device); | |
1090 | ||
1091 | if (ACPI_FAILURE(status)) | |
1092 | return -EINVAL; | |
1093 | return 0; | |
1094 | } | |
1095 | ||
1096 | static void acpi_device_remove_notify_handler(struct acpi_device *device) | |
1097 | { | |
ccba2a36 | 1098 | if (device->device_type == ACPI_BUS_TYPE_POWER_BUTTON) |
46ec8598 | 1099 | acpi_remove_fixed_event_handler(ACPI_EVENT_POWER_BUTTON, |
236105db | 1100 | acpi_device_fixed_event); |
ccba2a36 | 1101 | else if (device->device_type == ACPI_BUS_TYPE_SLEEP_BUTTON) |
46ec8598 | 1102 | acpi_remove_fixed_event_handler(ACPI_EVENT_SLEEP_BUTTON, |
236105db | 1103 | acpi_device_fixed_event); |
46ec8598 BH |
1104 | else |
1105 | acpi_remove_notify_handler(device->handle, ACPI_DEVICE_NOTIFY, | |
1106 | acpi_device_notify); | |
1107 | } | |
1108 | ||
d9e455f5 | 1109 | static int acpi_device_probe(struct device *dev) |
1da177e4 | 1110 | { |
5d9464a4 PM |
1111 | struct acpi_device *acpi_dev = to_acpi_device(dev); |
1112 | struct acpi_driver *acpi_drv = to_acpi_driver(dev->driver); | |
1113 | int ret; | |
1114 | ||
fc2e0a83 | 1115 | if (acpi_dev->handler && !acpi_is_pnp_device(acpi_dev)) |
24071f47 RW |
1116 | return -EINVAL; |
1117 | ||
d9e455f5 RW |
1118 | if (!acpi_drv->ops.add) |
1119 | return -ENOSYS; | |
46ec8598 | 1120 | |
d9e455f5 RW |
1121 | ret = acpi_drv->ops.add(acpi_dev); |
1122 | if (ret) | |
1123 | return ret; | |
46ec8598 | 1124 | |
d9e455f5 RW |
1125 | acpi_dev->driver = acpi_drv; |
1126 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, | |
1127 | "Driver [%s] successfully bound to device [%s]\n", | |
1128 | acpi_drv->name, acpi_dev->pnp.bus_id)); | |
1129 | ||
1130 | if (acpi_drv->ops.notify) { | |
1131 | ret = acpi_device_install_notify_handler(acpi_dev); | |
1132 | if (ret) { | |
1133 | if (acpi_drv->ops.remove) | |
1134 | acpi_drv->ops.remove(acpi_dev); | |
1135 | ||
1136 | acpi_dev->driver = NULL; | |
1137 | acpi_dev->driver_data = NULL; | |
1138 | return ret; | |
1139 | } | |
5d9464a4 | 1140 | } |
d9e455f5 RW |
1141 | |
1142 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Found driver [%s] for device [%s]\n", | |
1143 | acpi_drv->name, acpi_dev->pnp.bus_id)); | |
1144 | get_device(dev); | |
1145 | return 0; | |
5d9464a4 | 1146 | } |
1da177e4 | 1147 | |
5d9464a4 PM |
1148 | static int acpi_device_remove(struct device * dev) |
1149 | { | |
1150 | struct acpi_device *acpi_dev = to_acpi_device(dev); | |
1151 | struct acpi_driver *acpi_drv = acpi_dev->driver; | |
1152 | ||
1153 | if (acpi_drv) { | |
46ec8598 BH |
1154 | if (acpi_drv->ops.notify) |
1155 | acpi_device_remove_notify_handler(acpi_dev); | |
5d9464a4 | 1156 | if (acpi_drv->ops.remove) |
51fac838 | 1157 | acpi_drv->ops.remove(acpi_dev); |
1da177e4 | 1158 | } |
5d9464a4 | 1159 | acpi_dev->driver = NULL; |
db89b4f0 | 1160 | acpi_dev->driver_data = NULL; |
1da177e4 | 1161 | |
5d9464a4 | 1162 | put_device(dev); |
9e89dde2 ZR |
1163 | return 0; |
1164 | } | |
1da177e4 | 1165 | |
55955aad | 1166 | struct bus_type acpi_bus_type = { |
9e89dde2 | 1167 | .name = "acpi", |
5d9464a4 PM |
1168 | .match = acpi_bus_match, |
1169 | .probe = acpi_device_probe, | |
1170 | .remove = acpi_device_remove, | |
1171 | .uevent = acpi_device_uevent, | |
9e89dde2 ZR |
1172 | }; |
1173 | ||
d783156e RW |
1174 | static void acpi_device_del(struct acpi_device *device) |
1175 | { | |
1176 | mutex_lock(&acpi_device_lock); | |
1177 | if (device->parent) | |
1178 | list_del(&device->node); | |
1179 | ||
1180 | list_del(&device->wakeup_list); | |
1181 | mutex_unlock(&acpi_device_lock); | |
1182 | ||
1183 | acpi_power_add_remove_device(device, false); | |
1184 | acpi_device_remove_files(device); | |
1185 | if (device->remove) | |
1186 | device->remove(device); | |
1187 | ||
1188 | device_del(&device->dev); | |
1189 | } | |
1190 | ||
1191 | static LIST_HEAD(acpi_device_del_list); | |
1192 | static DEFINE_MUTEX(acpi_device_del_lock); | |
1193 | ||
1194 | static void acpi_device_del_work_fn(struct work_struct *work_not_used) | |
1195 | { | |
1196 | for (;;) { | |
1197 | struct acpi_device *adev; | |
1198 | ||
1199 | mutex_lock(&acpi_device_del_lock); | |
1200 | ||
1201 | if (list_empty(&acpi_device_del_list)) { | |
1202 | mutex_unlock(&acpi_device_del_lock); | |
1203 | break; | |
1204 | } | |
1205 | adev = list_first_entry(&acpi_device_del_list, | |
1206 | struct acpi_device, del_list); | |
1207 | list_del(&adev->del_list); | |
1208 | ||
1209 | mutex_unlock(&acpi_device_del_lock); | |
1210 | ||
1211 | acpi_device_del(adev); | |
1212 | /* | |
1213 | * Drop references to all power resources that might have been | |
1214 | * used by the device. | |
1215 | */ | |
1216 | acpi_power_transition(adev, ACPI_STATE_D3_COLD); | |
1217 | put_device(&adev->dev); | |
1218 | } | |
1219 | } | |
1220 | ||
1221 | /** | |
1222 | * acpi_scan_drop_device - Drop an ACPI device object. | |
1223 | * @handle: Handle of an ACPI namespace node, not used. | |
1224 | * @context: Address of the ACPI device object to drop. | |
1225 | * | |
1226 | * This is invoked by acpi_ns_delete_node() during the removal of the ACPI | |
1227 | * namespace node the device object pointed to by @context is attached to. | |
1228 | * | |
1229 | * The unregistration is carried out asynchronously to avoid running | |
1230 | * acpi_device_del() under the ACPICA's namespace mutex and the list is used to | |
1231 | * ensure the correct ordering (the device objects must be unregistered in the | |
1232 | * same order in which the corresponding namespace nodes are deleted). | |
1233 | */ | |
1234 | static void acpi_scan_drop_device(acpi_handle handle, void *context) | |
caf5c03f | 1235 | { |
d783156e RW |
1236 | static DECLARE_WORK(work, acpi_device_del_work_fn); |
1237 | struct acpi_device *adev = context; | |
1238 | ||
1239 | mutex_lock(&acpi_device_del_lock); | |
1240 | ||
1241 | /* | |
1242 | * Use the ACPI hotplug workqueue which is ordered, so this work item | |
1243 | * won't run after any hotplug work items submitted subsequently. That | |
1244 | * prevents attempts to register device objects identical to those being | |
1245 | * deleted from happening concurrently (such attempts result from | |
1246 | * hotplug events handled via the ACPI hotplug workqueue). It also will | |
1247 | * run after all of the work items submitted previosuly, which helps | |
1248 | * those work items to ensure that they are not accessing stale device | |
1249 | * objects. | |
1250 | */ | |
1251 | if (list_empty(&acpi_device_del_list)) | |
1252 | acpi_queue_hotplug_work(&work); | |
1253 | ||
1254 | list_add_tail(&adev->del_list, &acpi_device_del_list); | |
1255 | /* Make acpi_ns_validate_handle() return NULL for this handle. */ | |
1256 | adev->handle = INVALID_ACPI_HANDLE; | |
1257 | ||
1258 | mutex_unlock(&acpi_device_del_lock); | |
caf5c03f RW |
1259 | } |
1260 | ||
78ea4639 RW |
1261 | static int acpi_get_device_data(acpi_handle handle, struct acpi_device **device, |
1262 | void (*callback)(void *)) | |
caf5c03f RW |
1263 | { |
1264 | acpi_status status; | |
1265 | ||
1266 | if (!device) | |
1267 | return -EINVAL; | |
1268 | ||
78ea4639 RW |
1269 | status = acpi_get_data_full(handle, acpi_scan_drop_device, |
1270 | (void **)device, callback); | |
caf5c03f RW |
1271 | if (ACPI_FAILURE(status) || !*device) { |
1272 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "No context for object [%p]\n", | |
1273 | handle)); | |
1274 | return -ENODEV; | |
1275 | } | |
1276 | return 0; | |
1277 | } | |
78ea4639 RW |
1278 | |
1279 | int acpi_bus_get_device(acpi_handle handle, struct acpi_device **device) | |
1280 | { | |
1281 | return acpi_get_device_data(handle, device, NULL); | |
1282 | } | |
6585925b | 1283 | EXPORT_SYMBOL(acpi_bus_get_device); |
caf5c03f | 1284 | |
78ea4639 RW |
1285 | static void get_acpi_device(void *dev) |
1286 | { | |
1287 | if (dev) | |
1288 | get_device(&((struct acpi_device *)dev)->dev); | |
1289 | } | |
1290 | ||
1291 | struct acpi_device *acpi_bus_get_acpi_device(acpi_handle handle) | |
1292 | { | |
1293 | struct acpi_device *adev = NULL; | |
1294 | ||
1295 | acpi_get_device_data(handle, &adev, get_acpi_device); | |
1296 | return adev; | |
1297 | } | |
1298 | ||
1299 | void acpi_bus_put_acpi_device(struct acpi_device *adev) | |
1300 | { | |
1301 | put_device(&adev->dev); | |
1302 | } | |
1303 | ||
cf860be6 RW |
1304 | int acpi_device_add(struct acpi_device *device, |
1305 | void (*release)(struct device *)) | |
1da177e4 | 1306 | { |
4be44fcd | 1307 | int result; |
e49bd2dd ZR |
1308 | struct acpi_device_bus_id *acpi_device_bus_id, *new_bus_id; |
1309 | int found = 0; | |
66b7ed40 | 1310 | |
d43e167d RW |
1311 | if (device->handle) { |
1312 | acpi_status status; | |
1313 | ||
d783156e | 1314 | status = acpi_attach_data(device->handle, acpi_scan_drop_device, |
d43e167d RW |
1315 | device); |
1316 | if (ACPI_FAILURE(status)) { | |
1317 | acpi_handle_err(device->handle, | |
1318 | "Unable to attach device data\n"); | |
1319 | return -ENODEV; | |
1320 | } | |
1321 | } | |
1322 | ||
9e89dde2 ZR |
1323 | /* |
1324 | * Linkage | |
1325 | * ------- | |
1326 | * Link this device to its parent and siblings. | |
1327 | */ | |
1328 | INIT_LIST_HEAD(&device->children); | |
1329 | INIT_LIST_HEAD(&device->node); | |
9e89dde2 | 1330 | INIT_LIST_HEAD(&device->wakeup_list); |
1033f904 | 1331 | INIT_LIST_HEAD(&device->physical_node_list); |
d783156e | 1332 | INIT_LIST_HEAD(&device->del_list); |
1033f904 | 1333 | mutex_init(&device->physical_node_lock); |
1da177e4 | 1334 | |
e49bd2dd ZR |
1335 | new_bus_id = kzalloc(sizeof(struct acpi_device_bus_id), GFP_KERNEL); |
1336 | if (!new_bus_id) { | |
d43e167d RW |
1337 | pr_err(PREFIX "Memory allocation error\n"); |
1338 | result = -ENOMEM; | |
1339 | goto err_detach; | |
1da177e4 | 1340 | } |
e49bd2dd | 1341 | |
9090589d | 1342 | mutex_lock(&acpi_device_lock); |
e49bd2dd ZR |
1343 | /* |
1344 | * Find suitable bus_id and instance number in acpi_bus_id_list | |
1345 | * If failed, create one and link it into acpi_bus_id_list | |
1346 | */ | |
1347 | list_for_each_entry(acpi_device_bus_id, &acpi_bus_id_list, node) { | |
1131b938 BH |
1348 | if (!strcmp(acpi_device_bus_id->bus_id, |
1349 | acpi_device_hid(device))) { | |
1350 | acpi_device_bus_id->instance_no++; | |
e49bd2dd ZR |
1351 | found = 1; |
1352 | kfree(new_bus_id); | |
1353 | break; | |
1354 | } | |
1da177e4 | 1355 | } |
0c526d96 | 1356 | if (!found) { |
e49bd2dd | 1357 | acpi_device_bus_id = new_bus_id; |
1131b938 | 1358 | strcpy(acpi_device_bus_id->bus_id, acpi_device_hid(device)); |
e49bd2dd ZR |
1359 | acpi_device_bus_id->instance_no = 0; |
1360 | list_add_tail(&acpi_device_bus_id->node, &acpi_bus_id_list); | |
1da177e4 | 1361 | } |
0794469d | 1362 | dev_set_name(&device->dev, "%s:%02x", acpi_device_bus_id->bus_id, acpi_device_bus_id->instance_no); |
1da177e4 | 1363 | |
33b57150 | 1364 | if (device->parent) |
9e89dde2 | 1365 | list_add_tail(&device->node, &device->parent->children); |
33b57150 | 1366 | |
9e89dde2 ZR |
1367 | if (device->wakeup.flags.valid) |
1368 | list_add_tail(&device->wakeup_list, &acpi_wakeup_device_list); | |
9090589d | 1369 | mutex_unlock(&acpi_device_lock); |
1da177e4 | 1370 | |
1890a97a | 1371 | if (device->parent) |
66b7ed40 | 1372 | device->dev.parent = &device->parent->dev; |
1890a97a | 1373 | device->dev.bus = &acpi_bus_type; |
82c7d5ef | 1374 | device->dev.release = release; |
cf860be6 | 1375 | result = device_add(&device->dev); |
0c526d96 | 1376 | if (result) { |
8b12b922 | 1377 | dev_err(&device->dev, "Error registering device\n"); |
d43e167d | 1378 | goto err; |
1da177e4 | 1379 | } |
1da177e4 | 1380 | |
e49bd2dd | 1381 | result = acpi_device_setup_files(device); |
0c526d96 | 1382 | if (result) |
0794469d KS |
1383 | printk(KERN_ERR PREFIX "Error creating sysfs interface for device %s\n", |
1384 | dev_name(&device->dev)); | |
1da177e4 | 1385 | |
1da177e4 | 1386 | return 0; |
d43e167d RW |
1387 | |
1388 | err: | |
9090589d | 1389 | mutex_lock(&acpi_device_lock); |
33b57150 | 1390 | if (device->parent) |
e49bd2dd | 1391 | list_del(&device->node); |
e49bd2dd | 1392 | list_del(&device->wakeup_list); |
9090589d | 1393 | mutex_unlock(&acpi_device_lock); |
d43e167d RW |
1394 | |
1395 | err_detach: | |
d783156e | 1396 | acpi_detach_data(device->handle, acpi_scan_drop_device); |
e49bd2dd | 1397 | return result; |
1da177e4 LT |
1398 | } |
1399 | ||
8a0662d9 RW |
1400 | struct acpi_device *acpi_get_next_child(struct device *dev, |
1401 | struct acpi_device *child) | |
1402 | { | |
1403 | struct acpi_device *adev = ACPI_COMPANION(dev); | |
1404 | struct list_head *head, *next; | |
1405 | ||
1406 | if (!adev) | |
1407 | return NULL; | |
1408 | ||
1409 | head = &adev->children; | |
1410 | if (list_empty(head)) | |
1411 | return NULL; | |
1412 | ||
1413 | if (!child) | |
1414 | return list_first_entry(head, struct acpi_device, node); | |
1415 | ||
1416 | next = child->node.next; | |
1417 | return next == head ? NULL : list_entry(next, struct acpi_device, node); | |
1418 | } | |
1419 | ||
9e89dde2 ZR |
1420 | /* -------------------------------------------------------------------------- |
1421 | Driver Management | |
1422 | -------------------------------------------------------------------------- */ | |
9e89dde2 ZR |
1423 | /** |
1424 | * acpi_bus_register_driver - register a driver with the ACPI bus | |
1425 | * @driver: driver being registered | |
1426 | * | |
1427 | * Registers a driver with the ACPI bus. Searches the namespace for all | |
1428 | * devices that match the driver's criteria and binds. Returns zero for | |
1429 | * success or a negative error status for failure. | |
1430 | */ | |
1431 | int acpi_bus_register_driver(struct acpi_driver *driver) | |
1da177e4 | 1432 | { |
1890a97a | 1433 | int ret; |
1da177e4 | 1434 | |
9e89dde2 ZR |
1435 | if (acpi_disabled) |
1436 | return -ENODEV; | |
1890a97a PM |
1437 | driver->drv.name = driver->name; |
1438 | driver->drv.bus = &acpi_bus_type; | |
1439 | driver->drv.owner = driver->owner; | |
1da177e4 | 1440 | |
1890a97a PM |
1441 | ret = driver_register(&driver->drv); |
1442 | return ret; | |
9e89dde2 | 1443 | } |
1da177e4 | 1444 | |
9e89dde2 ZR |
1445 | EXPORT_SYMBOL(acpi_bus_register_driver); |
1446 | ||
1447 | /** | |
b27b14ce | 1448 | * acpi_bus_unregister_driver - unregisters a driver with the ACPI bus |
9e89dde2 ZR |
1449 | * @driver: driver to unregister |
1450 | * | |
1451 | * Unregisters a driver with the ACPI bus. Searches the namespace for all | |
1452 | * devices that match the driver's criteria and unbinds. | |
1453 | */ | |
1454 | void acpi_bus_unregister_driver(struct acpi_driver *driver) | |
1455 | { | |
1890a97a | 1456 | driver_unregister(&driver->drv); |
9e89dde2 ZR |
1457 | } |
1458 | ||
1459 | EXPORT_SYMBOL(acpi_bus_unregister_driver); | |
1460 | ||
9e89dde2 ZR |
1461 | /* -------------------------------------------------------------------------- |
1462 | Device Enumeration | |
1463 | -------------------------------------------------------------------------- */ | |
5c478f49 BH |
1464 | static struct acpi_device *acpi_bus_get_parent(acpi_handle handle) |
1465 | { | |
456de893 | 1466 | struct acpi_device *device = NULL; |
5c478f49 | 1467 | acpi_status status; |
5c478f49 BH |
1468 | |
1469 | /* | |
1470 | * Fixed hardware devices do not appear in the namespace and do not | |
1471 | * have handles, but we fabricate acpi_devices for them, so we have | |
1472 | * to deal with them specially. | |
1473 | */ | |
456de893 | 1474 | if (!handle) |
5c478f49 BH |
1475 | return acpi_root; |
1476 | ||
1477 | do { | |
1478 | status = acpi_get_parent(handle, &handle); | |
5c478f49 | 1479 | if (ACPI_FAILURE(status)) |
456de893 RW |
1480 | return status == AE_NULL_ENTRY ? NULL : acpi_root; |
1481 | } while (acpi_bus_get_device(handle, &device)); | |
1482 | return device; | |
5c478f49 BH |
1483 | } |
1484 | ||
9e89dde2 ZR |
1485 | acpi_status |
1486 | acpi_bus_get_ejd(acpi_handle handle, acpi_handle *ejd) | |
1487 | { | |
1488 | acpi_status status; | |
1489 | acpi_handle tmp; | |
1490 | struct acpi_buffer buffer = {ACPI_ALLOCATE_BUFFER, NULL}; | |
1491 | union acpi_object *obj; | |
1492 | ||
1493 | status = acpi_get_handle(handle, "_EJD", &tmp); | |
1494 | if (ACPI_FAILURE(status)) | |
1495 | return status; | |
1496 | ||
1497 | status = acpi_evaluate_object(handle, "_EJD", NULL, &buffer); | |
1498 | if (ACPI_SUCCESS(status)) { | |
1499 | obj = buffer.pointer; | |
3b5fee59 HM |
1500 | status = acpi_get_handle(ACPI_ROOT_OBJECT, obj->string.pointer, |
1501 | ejd); | |
9e89dde2 ZR |
1502 | kfree(buffer.pointer); |
1503 | } | |
1504 | return status; | |
1505 | } | |
1506 | EXPORT_SYMBOL_GPL(acpi_bus_get_ejd); | |
1507 | ||
e88c9c60 RW |
1508 | static int acpi_bus_extract_wakeup_device_power_package(acpi_handle handle, |
1509 | struct acpi_device_wakeup *wakeup) | |
9e89dde2 | 1510 | { |
b581a7f9 RW |
1511 | struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; |
1512 | union acpi_object *package = NULL; | |
9e89dde2 | 1513 | union acpi_object *element = NULL; |
b581a7f9 | 1514 | acpi_status status; |
e88c9c60 | 1515 | int err = -ENODATA; |
9e89dde2 | 1516 | |
b581a7f9 | 1517 | if (!wakeup) |
e88c9c60 | 1518 | return -EINVAL; |
9e89dde2 | 1519 | |
993cbe59 | 1520 | INIT_LIST_HEAD(&wakeup->resources); |
9e89dde2 | 1521 | |
b581a7f9 RW |
1522 | /* _PRW */ |
1523 | status = acpi_evaluate_object(handle, "_PRW", NULL, &buffer); | |
1524 | if (ACPI_FAILURE(status)) { | |
1525 | ACPI_EXCEPTION((AE_INFO, status, "Evaluating _PRW")); | |
e88c9c60 | 1526 | return err; |
b581a7f9 RW |
1527 | } |
1528 | ||
1529 | package = (union acpi_object *)buffer.pointer; | |
1530 | ||
e88c9c60 | 1531 | if (!package || package->package.count < 2) |
b581a7f9 | 1532 | goto out; |
b581a7f9 | 1533 | |
9e89dde2 | 1534 | element = &(package->package.elements[0]); |
e88c9c60 | 1535 | if (!element) |
b581a7f9 | 1536 | goto out; |
e88c9c60 | 1537 | |
9e89dde2 ZR |
1538 | if (element->type == ACPI_TYPE_PACKAGE) { |
1539 | if ((element->package.count < 2) || | |
1540 | (element->package.elements[0].type != | |
1541 | ACPI_TYPE_LOCAL_REFERENCE) | |
e88c9c60 | 1542 | || (element->package.elements[1].type != ACPI_TYPE_INTEGER)) |
b581a7f9 | 1543 | goto out; |
e88c9c60 | 1544 | |
b581a7f9 | 1545 | wakeup->gpe_device = |
9e89dde2 | 1546 | element->package.elements[0].reference.handle; |
b581a7f9 | 1547 | wakeup->gpe_number = |
9e89dde2 ZR |
1548 | (u32) element->package.elements[1].integer.value; |
1549 | } else if (element->type == ACPI_TYPE_INTEGER) { | |
b581a7f9 RW |
1550 | wakeup->gpe_device = NULL; |
1551 | wakeup->gpe_number = element->integer.value; | |
1552 | } else { | |
b581a7f9 RW |
1553 | goto out; |
1554 | } | |
9e89dde2 ZR |
1555 | |
1556 | element = &(package->package.elements[1]); | |
e88c9c60 | 1557 | if (element->type != ACPI_TYPE_INTEGER) |
b581a7f9 | 1558 | goto out; |
e88c9c60 | 1559 | |
b581a7f9 | 1560 | wakeup->sleep_state = element->integer.value; |
9e89dde2 | 1561 | |
e88c9c60 RW |
1562 | err = acpi_extract_power_resources(package, 2, &wakeup->resources); |
1563 | if (err) | |
b581a7f9 | 1564 | goto out; |
9e89dde2 | 1565 | |
0596a52b RW |
1566 | if (!list_empty(&wakeup->resources)) { |
1567 | int sleep_state; | |
9e89dde2 | 1568 | |
b5d667eb RW |
1569 | err = acpi_power_wakeup_list_init(&wakeup->resources, |
1570 | &sleep_state); | |
1571 | if (err) { | |
1572 | acpi_handle_warn(handle, "Retrieving current states " | |
1573 | "of wakeup power resources failed\n"); | |
1574 | acpi_power_resources_list_free(&wakeup->resources); | |
1575 | goto out; | |
1576 | } | |
0596a52b RW |
1577 | if (sleep_state < wakeup->sleep_state) { |
1578 | acpi_handle_warn(handle, "Overriding _PRW sleep state " | |
1579 | "(S%d) by S%d from power resources\n", | |
1580 | (int)wakeup->sleep_state, sleep_state); | |
1581 | wakeup->sleep_state = sleep_state; | |
1582 | } | |
1583 | } | |
9874647b | 1584 | |
b581a7f9 RW |
1585 | out: |
1586 | kfree(buffer.pointer); | |
e88c9c60 | 1587 | return err; |
1da177e4 LT |
1588 | } |
1589 | ||
bd9b2f9a | 1590 | static void acpi_wakeup_gpe_init(struct acpi_device *device) |
1da177e4 | 1591 | { |
29b71a1c | 1592 | struct acpi_device_id button_device_ids[] = { |
29b71a1c | 1593 | {"PNP0C0C", 0}, |
b7e38304 | 1594 | {"PNP0C0D", 0}, |
29b71a1c TR |
1595 | {"PNP0C0E", 0}, |
1596 | {"", 0}, | |
1597 | }; | |
bd9b2f9a | 1598 | struct acpi_device_wakeup *wakeup = &device->wakeup; |
f517709d RW |
1599 | acpi_status status; |
1600 | acpi_event_status event_status; | |
1601 | ||
bd9b2f9a | 1602 | wakeup->flags.notifier_present = 0; |
f517709d RW |
1603 | |
1604 | /* Power button, Lid switch always enable wakeup */ | |
1605 | if (!acpi_match_device_ids(device, button_device_ids)) { | |
bd9b2f9a | 1606 | wakeup->flags.run_wake = 1; |
b7e38304 ZR |
1607 | if (!acpi_match_device_ids(device, &button_device_ids[1])) { |
1608 | /* Do not use Lid/sleep button for S5 wakeup */ | |
bd9b2f9a RW |
1609 | if (wakeup->sleep_state == ACPI_STATE_S5) |
1610 | wakeup->sleep_state = ACPI_STATE_S4; | |
b7e38304 | 1611 | } |
bd9b2f9a | 1612 | acpi_mark_gpe_for_wake(wakeup->gpe_device, wakeup->gpe_number); |
f2b56bc8 | 1613 | device_set_wakeup_capable(&device->dev, true); |
f517709d RW |
1614 | return; |
1615 | } | |
1616 | ||
bd9b2f9a RW |
1617 | acpi_setup_gpe_for_wake(device->handle, wakeup->gpe_device, |
1618 | wakeup->gpe_number); | |
1619 | status = acpi_get_gpe_status(wakeup->gpe_device, wakeup->gpe_number, | |
1620 | &event_status); | |
1621 | if (ACPI_FAILURE(status)) | |
1622 | return; | |
1623 | ||
2f857234 | 1624 | wakeup->flags.run_wake = !!(event_status & ACPI_EVENT_FLAG_HAS_HANDLER); |
f517709d RW |
1625 | } |
1626 | ||
d57d09a4 | 1627 | static void acpi_bus_get_wakeup_device_flags(struct acpi_device *device) |
f517709d | 1628 | { |
e88c9c60 | 1629 | int err; |
29b71a1c | 1630 | |
d57d09a4 | 1631 | /* Presence of _PRW indicates wake capable */ |
952c63e9 | 1632 | if (!acpi_has_method(device->handle, "_PRW")) |
d57d09a4 RW |
1633 | return; |
1634 | ||
e88c9c60 RW |
1635 | err = acpi_bus_extract_wakeup_device_power_package(device->handle, |
1636 | &device->wakeup); | |
1637 | if (err) { | |
1638 | dev_err(&device->dev, "_PRW evaluation error: %d\n", err); | |
d57d09a4 | 1639 | return; |
9e89dde2 | 1640 | } |
1da177e4 | 1641 | |
9e89dde2 | 1642 | device->wakeup.flags.valid = 1; |
9b83ccd2 | 1643 | device->wakeup.prepare_count = 0; |
bd9b2f9a | 1644 | acpi_wakeup_gpe_init(device); |
729b2bdb ZY |
1645 | /* Call _PSW/_DSW object to disable its ability to wake the sleeping |
1646 | * system for the ACPI device with the _PRW object. | |
1647 | * The _PSW object is depreciated in ACPI 3.0 and is replaced by _DSW. | |
1648 | * So it is necessary to call _DSW object first. Only when it is not | |
1649 | * present will the _PSW object used. | |
1650 | */ | |
e88c9c60 RW |
1651 | err = acpi_device_sleep_wake(device, 0, 0, 0); |
1652 | if (err) | |
77e76609 RW |
1653 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
1654 | "error in _DSW or _PSW evaluation\n")); | |
1da177e4 | 1655 | } |
1da177e4 | 1656 | |
f33ce568 RW |
1657 | static void acpi_bus_init_power_state(struct acpi_device *device, int state) |
1658 | { | |
1659 | struct acpi_device_power_state *ps = &device->power.states[state]; | |
ef85bdbe RW |
1660 | char pathname[5] = { '_', 'P', 'R', '0' + state, '\0' }; |
1661 | struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; | |
f33ce568 | 1662 | acpi_status status; |
bf325f95 | 1663 | |
f33ce568 RW |
1664 | INIT_LIST_HEAD(&ps->resources); |
1665 | ||
ef85bdbe RW |
1666 | /* Evaluate "_PRx" to get referenced power resources */ |
1667 | status = acpi_evaluate_object(device->handle, pathname, NULL, &buffer); | |
1668 | if (ACPI_SUCCESS(status)) { | |
1669 | union acpi_object *package = buffer.pointer; | |
1670 | ||
1671 | if (buffer.length && package | |
1672 | && package->type == ACPI_TYPE_PACKAGE | |
1673 | && package->package.count) { | |
e88c9c60 RW |
1674 | int err = acpi_extract_power_resources(package, 0, |
1675 | &ps->resources); | |
1676 | if (!err) | |
ef85bdbe | 1677 | device->power.flags.power_resources = 1; |
f33ce568 | 1678 | } |
ef85bdbe | 1679 | ACPI_FREE(buffer.pointer); |
f33ce568 RW |
1680 | } |
1681 | ||
1682 | /* Evaluate "_PSx" to see if we can do explicit sets */ | |
ef85bdbe | 1683 | pathname[2] = 'S'; |
952c63e9 | 1684 | if (acpi_has_method(device->handle, pathname)) |
f33ce568 RW |
1685 | ps->flags.explicit_set = 1; |
1686 | ||
1687 | /* | |
1688 | * State is valid if there are means to put the device into it. | |
1689 | * D3hot is only valid if _PR3 present. | |
1690 | */ | |
ef85bdbe | 1691 | if (!list_empty(&ps->resources) |
f33ce568 RW |
1692 | || (ps->flags.explicit_set && state < ACPI_STATE_D3_HOT)) { |
1693 | ps->flags.valid = 1; | |
1694 | ps->flags.os_accessible = 1; | |
1695 | } | |
1696 | ||
1697 | ps->power = -1; /* Unknown - driver assigned */ | |
1698 | ps->latency = -1; /* Unknown - driver assigned */ | |
1699 | } | |
1700 | ||
d43e167d | 1701 | static void acpi_bus_get_power_flags(struct acpi_device *device) |
1da177e4 | 1702 | { |
8bc5053b | 1703 | u32 i; |
1a365616 | 1704 | |
d43e167d | 1705 | /* Presence of _PS0|_PR0 indicates 'power manageable' */ |
952c63e9 JL |
1706 | if (!acpi_has_method(device->handle, "_PS0") && |
1707 | !acpi_has_method(device->handle, "_PR0")) | |
1708 | return; | |
1a365616 | 1709 | |
d43e167d | 1710 | device->flags.power_manageable = 1; |
4be44fcd | 1711 | |
9e89dde2 ZR |
1712 | /* |
1713 | * Power Management Flags | |
1714 | */ | |
952c63e9 | 1715 | if (acpi_has_method(device->handle, "_PSC")) |
9e89dde2 | 1716 | device->power.flags.explicit_get = 1; |
f25c0ae2 | 1717 | |
952c63e9 | 1718 | if (acpi_has_method(device->handle, "_IRC")) |
9e89dde2 | 1719 | device->power.flags.inrush_current = 1; |
1da177e4 | 1720 | |
f25c0ae2 RW |
1721 | if (acpi_has_method(device->handle, "_DSW")) |
1722 | device->power.flags.dsw_present = 1; | |
1723 | ||
9e89dde2 ZR |
1724 | /* |
1725 | * Enumerate supported power management states | |
1726 | */ | |
f33ce568 RW |
1727 | for (i = ACPI_STATE_D0; i <= ACPI_STATE_D3_HOT; i++) |
1728 | acpi_bus_init_power_state(device, i); | |
bf325f95 | 1729 | |
0b224527 | 1730 | INIT_LIST_HEAD(&device->power.states[ACPI_STATE_D3_COLD].resources); |
1da177e4 | 1731 | |
9e89dde2 ZR |
1732 | /* Set defaults for D0 and D3 states (always valid) */ |
1733 | device->power.states[ACPI_STATE_D0].flags.valid = 1; | |
1734 | device->power.states[ACPI_STATE_D0].power = 100; | |
8ad928d5 RW |
1735 | device->power.states[ACPI_STATE_D3_COLD].flags.valid = 1; |
1736 | device->power.states[ACPI_STATE_D3_COLD].power = 0; | |
c8f7a62c | 1737 | |
5c7dd710 RW |
1738 | /* Set D3cold's explicit_set flag if _PS3 exists. */ |
1739 | if (device->power.states[ACPI_STATE_D3_HOT].flags.explicit_set) | |
1740 | device->power.states[ACPI_STATE_D3_COLD].flags.explicit_set = 1; | |
1741 | ||
1399dfcd AL |
1742 | /* Presence of _PS3 or _PRx means we can put the device into D3 cold */ |
1743 | if (device->power.states[ACPI_STATE_D3_HOT].flags.explicit_set || | |
1744 | device->power.flags.power_resources) | |
1745 | device->power.states[ACPI_STATE_D3_COLD].flags.os_accessible = 1; | |
1746 | ||
1b1f3e16 | 1747 | if (acpi_bus_init_power(device)) |
b3785492 | 1748 | device->flags.power_manageable = 0; |
9e89dde2 | 1749 | } |
c8f7a62c | 1750 | |
d43e167d | 1751 | static void acpi_bus_get_flags(struct acpi_device *device) |
1da177e4 | 1752 | { |
1da177e4 | 1753 | /* Presence of _STA indicates 'dynamic_status' */ |
952c63e9 | 1754 | if (acpi_has_method(device->handle, "_STA")) |
1da177e4 LT |
1755 | device->flags.dynamic_status = 1; |
1756 | ||
1da177e4 | 1757 | /* Presence of _RMV indicates 'removable' */ |
952c63e9 | 1758 | if (acpi_has_method(device->handle, "_RMV")) |
1da177e4 LT |
1759 | device->flags.removable = 1; |
1760 | ||
1761 | /* Presence of _EJD|_EJ0 indicates 'ejectable' */ | |
952c63e9 JL |
1762 | if (acpi_has_method(device->handle, "_EJD") || |
1763 | acpi_has_method(device->handle, "_EJ0")) | |
1da177e4 | 1764 | device->flags.ejectable = 1; |
1da177e4 LT |
1765 | } |
1766 | ||
c7bcb4e9 | 1767 | static void acpi_device_get_busid(struct acpi_device *device) |
1da177e4 | 1768 | { |
4be44fcd LB |
1769 | char bus_id[5] = { '?', 0 }; |
1770 | struct acpi_buffer buffer = { sizeof(bus_id), bus_id }; | |
1771 | int i = 0; | |
1da177e4 LT |
1772 | |
1773 | /* | |
1774 | * Bus ID | |
1775 | * ------ | |
1776 | * The device's Bus ID is simply the object name. | |
1777 | * TBD: Shouldn't this value be unique (within the ACPI namespace)? | |
1778 | */ | |
859ac9a4 | 1779 | if (ACPI_IS_ROOT_DEVICE(device)) { |
1da177e4 | 1780 | strcpy(device->pnp.bus_id, "ACPI"); |
859ac9a4 BH |
1781 | return; |
1782 | } | |
1783 | ||
1784 | switch (device->device_type) { | |
1da177e4 LT |
1785 | case ACPI_BUS_TYPE_POWER_BUTTON: |
1786 | strcpy(device->pnp.bus_id, "PWRF"); | |
1787 | break; | |
1788 | case ACPI_BUS_TYPE_SLEEP_BUTTON: | |
1789 | strcpy(device->pnp.bus_id, "SLPF"); | |
1790 | break; | |
1791 | default: | |
66b7ed40 | 1792 | acpi_get_name(device->handle, ACPI_SINGLE_NAME, &buffer); |
1da177e4 LT |
1793 | /* Clean up trailing underscores (if any) */ |
1794 | for (i = 3; i > 1; i--) { | |
1795 | if (bus_id[i] == '_') | |
1796 | bus_id[i] = '\0'; | |
1797 | else | |
1798 | break; | |
1799 | } | |
1800 | strcpy(device->pnp.bus_id, bus_id); | |
1801 | break; | |
1802 | } | |
1803 | } | |
1804 | ||
ebf4df8d JL |
1805 | /* |
1806 | * acpi_ata_match - see if an acpi object is an ATA device | |
1807 | * | |
1808 | * If an acpi object has one of the ACPI ATA methods defined, | |
1809 | * then we can safely call it an ATA device. | |
1810 | */ | |
1811 | bool acpi_ata_match(acpi_handle handle) | |
1812 | { | |
1813 | return acpi_has_method(handle, "_GTF") || | |
1814 | acpi_has_method(handle, "_GTM") || | |
1815 | acpi_has_method(handle, "_STM") || | |
1816 | acpi_has_method(handle, "_SDD"); | |
1817 | } | |
1818 | ||
54735266 | 1819 | /* |
d4e1a692 | 1820 | * acpi_bay_match - see if an acpi object is an ejectable driver bay |
54735266 ZR |
1821 | * |
1822 | * If an acpi object is ejectable and has one of the ACPI ATA methods defined, | |
1823 | * then we can safely call it an ejectable drive bay | |
1824 | */ | |
ebf4df8d | 1825 | bool acpi_bay_match(acpi_handle handle) |
d4e1a692 | 1826 | { |
54735266 ZR |
1827 | acpi_handle phandle; |
1828 | ||
952c63e9 | 1829 | if (!acpi_has_method(handle, "_EJ0")) |
ebf4df8d JL |
1830 | return false; |
1831 | if (acpi_ata_match(handle)) | |
1832 | return true; | |
1833 | if (ACPI_FAILURE(acpi_get_parent(handle, &phandle))) | |
1834 | return false; | |
54735266 | 1835 | |
ebf4df8d | 1836 | return acpi_ata_match(phandle); |
54735266 ZR |
1837 | } |
1838 | ||
b43109fa | 1839 | bool acpi_device_is_battery(struct acpi_device *adev) |
1e2380cd | 1840 | { |
b43109fa | 1841 | struct acpi_hardware_id *hwid; |
1e2380cd | 1842 | |
b43109fa RW |
1843 | list_for_each_entry(hwid, &adev->pnp.ids, list) |
1844 | if (!strcmp("PNP0C0A", hwid->id)) | |
1845 | return true; | |
1e2380cd | 1846 | |
b43109fa | 1847 | return false; |
1e2380cd RW |
1848 | } |
1849 | ||
b43109fa | 1850 | static bool is_ejectable_bay(struct acpi_device *adev) |
1e2380cd | 1851 | { |
b43109fa RW |
1852 | acpi_handle handle = adev->handle; |
1853 | ||
1854 | if (acpi_has_method(handle, "_EJ0") && acpi_device_is_battery(adev)) | |
1e2380cd RW |
1855 | return true; |
1856 | ||
1857 | return acpi_bay_match(handle); | |
1858 | } | |
1859 | ||
3620f2f2 | 1860 | /* |
d4e1a692 | 1861 | * acpi_dock_match - see if an acpi object has a _DCK method |
3620f2f2 | 1862 | */ |
ebf4df8d | 1863 | bool acpi_dock_match(acpi_handle handle) |
3620f2f2 | 1864 | { |
ebf4df8d | 1865 | return acpi_has_method(handle, "_DCK"); |
3620f2f2 FS |
1866 | } |
1867 | ||
620e112c | 1868 | const char *acpi_device_hid(struct acpi_device *device) |
15b8dd53 | 1869 | { |
7f47fa6c | 1870 | struct acpi_hardware_id *hid; |
15b8dd53 | 1871 | |
2b2ae7c7 TR |
1872 | if (list_empty(&device->pnp.ids)) |
1873 | return dummy_hid; | |
1874 | ||
7f47fa6c BH |
1875 | hid = list_first_entry(&device->pnp.ids, struct acpi_hardware_id, list); |
1876 | return hid->id; | |
1877 | } | |
1878 | EXPORT_SYMBOL(acpi_device_hid); | |
15b8dd53 | 1879 | |
d4e1a692 | 1880 | static void acpi_add_id(struct acpi_device_pnp *pnp, const char *dev_id) |
7f47fa6c BH |
1881 | { |
1882 | struct acpi_hardware_id *id; | |
15b8dd53 | 1883 | |
7f47fa6c BH |
1884 | id = kmalloc(sizeof(*id), GFP_KERNEL); |
1885 | if (!id) | |
1886 | return; | |
15b8dd53 | 1887 | |
581de59e | 1888 | id->id = kstrdup(dev_id, GFP_KERNEL); |
7f47fa6c BH |
1889 | if (!id->id) { |
1890 | kfree(id); | |
1891 | return; | |
15b8dd53 BM |
1892 | } |
1893 | ||
d4e1a692 TK |
1894 | list_add_tail(&id->list, &pnp->ids); |
1895 | pnp->type.hardware_id = 1; | |
15b8dd53 BM |
1896 | } |
1897 | ||
222e82ac DW |
1898 | /* |
1899 | * Old IBM workstations have a DSDT bug wherein the SMBus object | |
1900 | * lacks the SMBUS01 HID and the methods do not have the necessary "_" | |
1901 | * prefix. Work around this. | |
1902 | */ | |
ebf4df8d | 1903 | static bool acpi_ibm_smbus_match(acpi_handle handle) |
222e82ac | 1904 | { |
ebf4df8d JL |
1905 | char node_name[ACPI_PATH_SEGMENT_LENGTH]; |
1906 | struct acpi_buffer path = { sizeof(node_name), node_name }; | |
222e82ac DW |
1907 | |
1908 | if (!dmi_name_in_vendors("IBM")) | |
ebf4df8d | 1909 | return false; |
222e82ac DW |
1910 | |
1911 | /* Look for SMBS object */ | |
ebf4df8d JL |
1912 | if (ACPI_FAILURE(acpi_get_name(handle, ACPI_SINGLE_NAME, &path)) || |
1913 | strcmp("SMBS", path.pointer)) | |
1914 | return false; | |
222e82ac DW |
1915 | |
1916 | /* Does it have the necessary (but misnamed) methods? */ | |
952c63e9 JL |
1917 | if (acpi_has_method(handle, "SBI") && |
1918 | acpi_has_method(handle, "SBR") && | |
1919 | acpi_has_method(handle, "SBW")) | |
ebf4df8d JL |
1920 | return true; |
1921 | ||
1922 | return false; | |
222e82ac DW |
1923 | } |
1924 | ||
ae3caa80 JL |
1925 | static bool acpi_object_is_system_bus(acpi_handle handle) |
1926 | { | |
1927 | acpi_handle tmp; | |
1928 | ||
1929 | if (ACPI_SUCCESS(acpi_get_handle(NULL, "\\_SB", &tmp)) && | |
1930 | tmp == handle) | |
1931 | return true; | |
1932 | if (ACPI_SUCCESS(acpi_get_handle(NULL, "\\_TZ", &tmp)) && | |
1933 | tmp == handle) | |
1934 | return true; | |
1935 | ||
1936 | return false; | |
1937 | } | |
1938 | ||
c0af4175 TK |
1939 | static void acpi_set_pnp_ids(acpi_handle handle, struct acpi_device_pnp *pnp, |
1940 | int device_type) | |
1da177e4 | 1941 | { |
4be44fcd | 1942 | acpi_status status; |
57f3674f | 1943 | struct acpi_device_info *info; |
78e25fef | 1944 | struct acpi_pnp_device_id_list *cid_list; |
7f47fa6c | 1945 | int i; |
1da177e4 | 1946 | |
c0af4175 | 1947 | switch (device_type) { |
1da177e4 | 1948 | case ACPI_BUS_TYPE_DEVICE: |
c0af4175 TK |
1949 | if (handle == ACPI_ROOT_OBJECT) { |
1950 | acpi_add_id(pnp, ACPI_SYSTEM_HID); | |
859ac9a4 BH |
1951 | break; |
1952 | } | |
1953 | ||
c0af4175 | 1954 | status = acpi_get_object_info(handle, &info); |
1da177e4 | 1955 | if (ACPI_FAILURE(status)) { |
c0af4175 TK |
1956 | pr_err(PREFIX "%s: Error reading device info\n", |
1957 | __func__); | |
1da177e4 LT |
1958 | return; |
1959 | } | |
1960 | ||
549e6845 | 1961 | if (info->valid & ACPI_VALID_HID) { |
c0af4175 | 1962 | acpi_add_id(pnp, info->hardware_id.string); |
549e6845 RW |
1963 | pnp->type.platform_id = 1; |
1964 | } | |
57f3674f | 1965 | if (info->valid & ACPI_VALID_CID) { |
15b8dd53 | 1966 | cid_list = &info->compatible_id_list; |
57f3674f | 1967 | for (i = 0; i < cid_list->count; i++) |
c0af4175 | 1968 | acpi_add_id(pnp, cid_list->ids[i].string); |
57f3674f | 1969 | } |
1da177e4 | 1970 | if (info->valid & ACPI_VALID_ADR) { |
c0af4175 TK |
1971 | pnp->bus_address = info->address; |
1972 | pnp->type.bus_address = 1; | |
1da177e4 | 1973 | } |
ccf78040 | 1974 | if (info->valid & ACPI_VALID_UID) |
c0af4175 | 1975 | pnp->unique_id = kstrdup(info->unique_id.string, |
ccf78040 | 1976 | GFP_KERNEL); |
ae843332 | 1977 | |
a83893ae BH |
1978 | kfree(info); |
1979 | ||
57f3674f BH |
1980 | /* |
1981 | * Some devices don't reliably have _HIDs & _CIDs, so add | |
1982 | * synthetic HIDs to make sure drivers can find them. | |
1983 | */ | |
c0af4175 TK |
1984 | if (acpi_is_video_device(handle)) |
1985 | acpi_add_id(pnp, ACPI_VIDEO_HID); | |
ebf4df8d | 1986 | else if (acpi_bay_match(handle)) |
c0af4175 | 1987 | acpi_add_id(pnp, ACPI_BAY_HID); |
ebf4df8d | 1988 | else if (acpi_dock_match(handle)) |
c0af4175 | 1989 | acpi_add_id(pnp, ACPI_DOCK_HID); |
ebf4df8d | 1990 | else if (acpi_ibm_smbus_match(handle)) |
c0af4175 | 1991 | acpi_add_id(pnp, ACPI_SMBUS_IBM_HID); |
ae3caa80 JL |
1992 | else if (list_empty(&pnp->ids) && |
1993 | acpi_object_is_system_bus(handle)) { | |
1994 | /* \_SB, \_TZ, LNXSYBUS */ | |
1995 | acpi_add_id(pnp, ACPI_BUS_HID); | |
c0af4175 TK |
1996 | strcpy(pnp->device_name, ACPI_BUS_DEVICE_NAME); |
1997 | strcpy(pnp->device_class, ACPI_BUS_CLASS); | |
b7b30de5 | 1998 | } |
54735266 | 1999 | |
1da177e4 LT |
2000 | break; |
2001 | case ACPI_BUS_TYPE_POWER: | |
c0af4175 | 2002 | acpi_add_id(pnp, ACPI_POWER_HID); |
1da177e4 LT |
2003 | break; |
2004 | case ACPI_BUS_TYPE_PROCESSOR: | |
c0af4175 | 2005 | acpi_add_id(pnp, ACPI_PROCESSOR_OBJECT_HID); |
1da177e4 | 2006 | break; |
1da177e4 | 2007 | case ACPI_BUS_TYPE_THERMAL: |
c0af4175 | 2008 | acpi_add_id(pnp, ACPI_THERMAL_HID); |
1da177e4 LT |
2009 | break; |
2010 | case ACPI_BUS_TYPE_POWER_BUTTON: | |
c0af4175 | 2011 | acpi_add_id(pnp, ACPI_BUTTON_HID_POWERF); |
1da177e4 LT |
2012 | break; |
2013 | case ACPI_BUS_TYPE_SLEEP_BUTTON: | |
c0af4175 | 2014 | acpi_add_id(pnp, ACPI_BUTTON_HID_SLEEPF); |
1da177e4 LT |
2015 | break; |
2016 | } | |
1da177e4 LT |
2017 | } |
2018 | ||
c0af4175 TK |
2019 | void acpi_free_pnp_ids(struct acpi_device_pnp *pnp) |
2020 | { | |
2021 | struct acpi_hardware_id *id, *tmp; | |
2022 | ||
2023 | list_for_each_entry_safe(id, tmp, &pnp->ids, list) { | |
2024 | kfree(id->id); | |
2025 | kfree(id); | |
2026 | } | |
2027 | kfree(pnp->unique_id); | |
2028 | } | |
2029 | ||
82c7d5ef RW |
2030 | void acpi_init_device_object(struct acpi_device *device, acpi_handle handle, |
2031 | int type, unsigned long long sta) | |
1da177e4 | 2032 | { |
d43e167d RW |
2033 | INIT_LIST_HEAD(&device->pnp.ids); |
2034 | device->device_type = type; | |
2035 | device->handle = handle; | |
2036 | device->parent = acpi_bus_get_parent(handle); | |
8a0662d9 | 2037 | device->fwnode.type = FWNODE_ACPI; |
25db115b | 2038 | acpi_set_device_status(device, sta); |
d43e167d | 2039 | acpi_device_get_busid(device); |
c0af4175 | 2040 | acpi_set_pnp_ids(handle, &device->pnp, type); |
ffdcd955 | 2041 | acpi_init_properties(device); |
d43e167d | 2042 | acpi_bus_get_flags(device); |
2c0d4fe0 | 2043 | device->flags.match_driver = false; |
202317a5 RW |
2044 | device->flags.initialized = true; |
2045 | device->flags.visited = false; | |
cf860be6 RW |
2046 | device_initialize(&device->dev); |
2047 | dev_set_uevent_suppress(&device->dev, true); | |
2048 | } | |
bc3b0772 | 2049 | |
cf860be6 RW |
2050 | void acpi_device_add_finalize(struct acpi_device *device) |
2051 | { | |
2052 | dev_set_uevent_suppress(&device->dev, false); | |
2053 | kobject_uevent(&device->dev.kobj, KOBJ_ADD); | |
1da177e4 LT |
2054 | } |
2055 | ||
5c478f49 BH |
2056 | static int acpi_add_single_object(struct acpi_device **child, |
2057 | acpi_handle handle, int type, | |
2c0d4fe0 | 2058 | unsigned long long sta) |
1da177e4 | 2059 | { |
77c24888 BH |
2060 | int result; |
2061 | struct acpi_device *device; | |
29aaefa6 | 2062 | struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; |
1da177e4 | 2063 | |
36bcbec7 | 2064 | device = kzalloc(sizeof(struct acpi_device), GFP_KERNEL); |
1da177e4 | 2065 | if (!device) { |
6468463a | 2066 | printk(KERN_ERR PREFIX "Memory allocation error\n"); |
d550d98d | 2067 | return -ENOMEM; |
1da177e4 | 2068 | } |
1da177e4 | 2069 | |
d43e167d RW |
2070 | acpi_init_device_object(device, handle, type, sta); |
2071 | acpi_bus_get_power_flags(device); | |
d57d09a4 | 2072 | acpi_bus_get_wakeup_device_flags(device); |
1da177e4 | 2073 | |
cf860be6 | 2074 | result = acpi_device_add(device, acpi_device_release); |
d43e167d | 2075 | if (result) { |
718fb0de | 2076 | acpi_device_release(&device->dev); |
d43e167d RW |
2077 | return result; |
2078 | } | |
1da177e4 | 2079 | |
d43e167d | 2080 | acpi_power_add_remove_device(device, true); |
cf860be6 | 2081 | acpi_device_add_finalize(device); |
d43e167d RW |
2082 | acpi_get_name(handle, ACPI_FULL_PATHNAME, &buffer); |
2083 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Added %s [%s] parent %s\n", | |
2084 | dev_name(&device->dev), (char *) buffer.pointer, | |
2085 | device->parent ? dev_name(&device->parent->dev) : "(null)")); | |
2086 | kfree(buffer.pointer); | |
2087 | *child = device; | |
2088 | return 0; | |
bf325f95 RW |
2089 | } |
2090 | ||
778cbc1d BH |
2091 | static int acpi_bus_type_and_status(acpi_handle handle, int *type, |
2092 | unsigned long long *sta) | |
1da177e4 | 2093 | { |
778cbc1d BH |
2094 | acpi_status status; |
2095 | acpi_object_type acpi_type; | |
1da177e4 | 2096 | |
778cbc1d | 2097 | status = acpi_get_type(handle, &acpi_type); |
51a85faf | 2098 | if (ACPI_FAILURE(status)) |
778cbc1d | 2099 | return -ENODEV; |
4be44fcd | 2100 | |
778cbc1d | 2101 | switch (acpi_type) { |
51a85faf BH |
2102 | case ACPI_TYPE_ANY: /* for ACPI_ROOT_OBJECT */ |
2103 | case ACPI_TYPE_DEVICE: | |
778cbc1d BH |
2104 | *type = ACPI_BUS_TYPE_DEVICE; |
2105 | status = acpi_bus_get_status_handle(handle, sta); | |
2106 | if (ACPI_FAILURE(status)) | |
2107 | return -ENODEV; | |
51a85faf BH |
2108 | break; |
2109 | case ACPI_TYPE_PROCESSOR: | |
778cbc1d BH |
2110 | *type = ACPI_BUS_TYPE_PROCESSOR; |
2111 | status = acpi_bus_get_status_handle(handle, sta); | |
2112 | if (ACPI_FAILURE(status)) | |
2113 | return -ENODEV; | |
51a85faf BH |
2114 | break; |
2115 | case ACPI_TYPE_THERMAL: | |
778cbc1d BH |
2116 | *type = ACPI_BUS_TYPE_THERMAL; |
2117 | *sta = ACPI_STA_DEFAULT; | |
51a85faf BH |
2118 | break; |
2119 | case ACPI_TYPE_POWER: | |
778cbc1d BH |
2120 | *type = ACPI_BUS_TYPE_POWER; |
2121 | *sta = ACPI_STA_DEFAULT; | |
51a85faf BH |
2122 | break; |
2123 | default: | |
778cbc1d | 2124 | return -ENODEV; |
51a85faf | 2125 | } |
1da177e4 | 2126 | |
778cbc1d BH |
2127 | return 0; |
2128 | } | |
2129 | ||
202317a5 RW |
2130 | bool acpi_device_is_present(struct acpi_device *adev) |
2131 | { | |
2132 | if (adev->status.present || adev->status.functional) | |
2133 | return true; | |
2134 | ||
2135 | adev->flags.initialized = false; | |
2136 | return false; | |
2137 | } | |
2138 | ||
4b59cc1f RW |
2139 | static bool acpi_scan_handler_matching(struct acpi_scan_handler *handler, |
2140 | char *idstr, | |
2141 | const struct acpi_device_id **matchid) | |
2142 | { | |
2143 | const struct acpi_device_id *devid; | |
2144 | ||
aca0a4eb RW |
2145 | if (handler->match) |
2146 | return handler->match(idstr, matchid); | |
2147 | ||
4b59cc1f RW |
2148 | for (devid = handler->ids; devid->id[0]; devid++) |
2149 | if (!strcmp((char *)devid->id, idstr)) { | |
2150 | if (matchid) | |
2151 | *matchid = devid; | |
2152 | ||
2153 | return true; | |
2154 | } | |
2155 | ||
2156 | return false; | |
2157 | } | |
2158 | ||
6b772e8f TK |
2159 | static struct acpi_scan_handler *acpi_scan_match_handler(char *idstr, |
2160 | const struct acpi_device_id **matchid) | |
2161 | { | |
2162 | struct acpi_scan_handler *handler; | |
2163 | ||
2164 | list_for_each_entry(handler, &acpi_scan_handlers_list, list_node) | |
2165 | if (acpi_scan_handler_matching(handler, idstr, matchid)) | |
2166 | return handler; | |
2167 | ||
2168 | return NULL; | |
2169 | } | |
2170 | ||
3f8055c3 RW |
2171 | void acpi_scan_hotplug_enabled(struct acpi_hotplug_profile *hotplug, bool val) |
2172 | { | |
3f8055c3 RW |
2173 | if (!!hotplug->enabled == !!val) |
2174 | return; | |
2175 | ||
2176 | mutex_lock(&acpi_scan_lock); | |
2177 | ||
2178 | hotplug->enabled = val; | |
3f8055c3 RW |
2179 | |
2180 | mutex_unlock(&acpi_scan_lock); | |
2181 | } | |
2182 | ||
3c2cc7ff | 2183 | static void acpi_scan_init_hotplug(struct acpi_device *adev) |
a33ec399 | 2184 | { |
6b772e8f | 2185 | struct acpi_hardware_id *hwid; |
a33ec399 | 2186 | |
b43109fa | 2187 | if (acpi_dock_match(adev->handle) || is_ejectable_bay(adev)) { |
1e2380cd RW |
2188 | acpi_dock_add(adev); |
2189 | return; | |
2190 | } | |
3c2cc7ff RW |
2191 | list_for_each_entry(hwid, &adev->pnp.ids, list) { |
2192 | struct acpi_scan_handler *handler; | |
a33ec399 | 2193 | |
6b772e8f | 2194 | handler = acpi_scan_match_handler(hwid->id, NULL); |
1a699476 RW |
2195 | if (handler) { |
2196 | adev->flags.hotplug_notify = true; | |
2197 | break; | |
2198 | } | |
3c2cc7ff | 2199 | } |
a33ec399 RW |
2200 | } |
2201 | ||
40e7fcb1 LT |
2202 | static void acpi_device_dep_initialize(struct acpi_device *adev) |
2203 | { | |
2204 | struct acpi_dep_data *dep; | |
2205 | struct acpi_handle_list dep_devices; | |
2206 | acpi_status status; | |
2207 | int i; | |
2208 | ||
2209 | if (!acpi_has_method(adev->handle, "_DEP")) | |
2210 | return; | |
2211 | ||
2212 | status = acpi_evaluate_reference(adev->handle, "_DEP", NULL, | |
2213 | &dep_devices); | |
2214 | if (ACPI_FAILURE(status)) { | |
80167a24 | 2215 | dev_dbg(&adev->dev, "Failed to evaluate _DEP.\n"); |
40e7fcb1 LT |
2216 | return; |
2217 | } | |
2218 | ||
2219 | for (i = 0; i < dep_devices.count; i++) { | |
2220 | struct acpi_device_info *info; | |
2221 | int skip; | |
2222 | ||
2223 | status = acpi_get_object_info(dep_devices.handles[i], &info); | |
2224 | if (ACPI_FAILURE(status)) { | |
80167a24 | 2225 | dev_dbg(&adev->dev, "Error reading _DEP device info\n"); |
40e7fcb1 LT |
2226 | continue; |
2227 | } | |
2228 | ||
2229 | /* | |
2230 | * Skip the dependency of Windows System Power | |
2231 | * Management Controller | |
2232 | */ | |
2233 | skip = info->valid & ACPI_VALID_HID && | |
2234 | !strcmp(info->hardware_id.string, "INT3396"); | |
2235 | ||
2236 | kfree(info); | |
2237 | ||
2238 | if (skip) | |
2239 | continue; | |
2240 | ||
2241 | dep = kzalloc(sizeof(struct acpi_dep_data), GFP_KERNEL); | |
2242 | if (!dep) | |
2243 | return; | |
2244 | ||
2245 | dep->master = dep_devices.handles[i]; | |
2246 | dep->slave = adev->handle; | |
2247 | adev->dep_unmet++; | |
2248 | ||
2249 | mutex_lock(&acpi_dep_list_lock); | |
2250 | list_add_tail(&dep->node , &acpi_dep_list); | |
2251 | mutex_unlock(&acpi_dep_list_lock); | |
2252 | } | |
2253 | } | |
2254 | ||
e3863094 RW |
2255 | static acpi_status acpi_bus_check_add(acpi_handle handle, u32 lvl_not_used, |
2256 | void *not_used, void **return_value) | |
778cbc1d | 2257 | { |
805d410f | 2258 | struct acpi_device *device = NULL; |
778cbc1d BH |
2259 | int type; |
2260 | unsigned long long sta; | |
2261 | int result; | |
2262 | ||
4002bf38 RW |
2263 | acpi_bus_get_device(handle, &device); |
2264 | if (device) | |
2265 | goto out; | |
2266 | ||
778cbc1d BH |
2267 | result = acpi_bus_type_and_status(handle, &type, &sta); |
2268 | if (result) | |
2269 | return AE_OK; | |
2270 | ||
82c7d5ef RW |
2271 | if (type == ACPI_BUS_TYPE_POWER) { |
2272 | acpi_add_power_resource(handle); | |
2273 | return AE_OK; | |
2274 | } | |
2275 | ||
2c0d4fe0 | 2276 | acpi_add_single_object(&device, handle, type, sta); |
e3b87f8a | 2277 | if (!device) |
51a85faf | 2278 | return AE_CTRL_DEPTH; |
1da177e4 | 2279 | |
3c2cc7ff | 2280 | acpi_scan_init_hotplug(device); |
40e7fcb1 | 2281 | acpi_device_dep_initialize(device); |
3c2cc7ff | 2282 | |
4002bf38 | 2283 | out: |
51a85faf BH |
2284 | if (!*return_value) |
2285 | *return_value = device; | |
805d410f | 2286 | |
51a85faf BH |
2287 | return AE_OK; |
2288 | } | |
3fb02738 | 2289 | |
48459340 ZR |
2290 | static int acpi_check_spi_i2c_slave(struct acpi_resource *ares, void *data) |
2291 | { | |
2292 | bool *is_spi_i2c_slave_p = data; | |
2293 | ||
2294 | if (ares->type != ACPI_RESOURCE_TYPE_SERIAL_BUS) | |
2295 | return 1; | |
2296 | ||
2297 | /* | |
2298 | * devices that are connected to UART still need to be enumerated to | |
2299 | * platform bus | |
2300 | */ | |
2301 | if (ares->data.common_serial_bus.type != ACPI_RESOURCE_SERIAL_TYPE_UART) | |
2302 | *is_spi_i2c_slave_p = true; | |
2303 | ||
2304 | /* no need to do more checking */ | |
2305 | return -1; | |
2306 | } | |
2307 | ||
2308 | static void acpi_default_enumeration(struct acpi_device *device) | |
2309 | { | |
2310 | struct list_head resource_list; | |
2311 | bool is_spi_i2c_slave = false; | |
2312 | ||
2313 | if (!device->pnp.type.platform_id || device->handler) | |
2314 | return; | |
2315 | ||
2316 | /* | |
2317 | * Do not enemerate SPI/I2C slaves as they will be enuerated by their | |
2318 | * respective parents. | |
2319 | */ | |
2320 | INIT_LIST_HEAD(&resource_list); | |
2321 | acpi_dev_get_resources(device, &resource_list, acpi_check_spi_i2c_slave, | |
2322 | &is_spi_i2c_slave); | |
2323 | acpi_dev_free_resource_list(&resource_list); | |
2324 | if (!is_spi_i2c_slave) | |
2325 | acpi_create_platform_device(device); | |
2326 | } | |
2327 | ||
c5698074 | 2328 | static int acpi_scan_attach_handler(struct acpi_device *device) |
ca589f94 | 2329 | { |
c5698074 RW |
2330 | struct acpi_hardware_id *hwid; |
2331 | int ret = 0; | |
ca589f94 | 2332 | |
c5698074 | 2333 | list_for_each_entry(hwid, &device->pnp.ids, list) { |
87b85b3c | 2334 | const struct acpi_device_id *devid; |
c5698074 | 2335 | struct acpi_scan_handler *handler; |
ca589f94 | 2336 | |
c5698074 RW |
2337 | handler = acpi_scan_match_handler(hwid->id, &devid); |
2338 | if (handler) { | |
d34afa9d RW |
2339 | if (!handler->attach) { |
2340 | device->pnp.type.platform_id = 0; | |
2341 | continue; | |
2342 | } | |
9cb32acf | 2343 | device->handler = handler; |
87b85b3c | 2344 | ret = handler->attach(device, devid); |
9cb32acf | 2345 | if (ret > 0) |
c5698074 | 2346 | break; |
9cb32acf RW |
2347 | |
2348 | device->handler = NULL; | |
2349 | if (ret < 0) | |
c5698074 | 2350 | break; |
ca589f94 RW |
2351 | } |
2352 | } | |
48459340 ZR |
2353 | if (!ret) |
2354 | acpi_default_enumeration(device); | |
2355 | ||
ca589f94 RW |
2356 | return ret; |
2357 | } | |
2358 | ||
2c22e652 | 2359 | static void acpi_bus_attach(struct acpi_device *device) |
51a85faf | 2360 | { |
2c22e652 | 2361 | struct acpi_device *child; |
1e2380cd | 2362 | acpi_handle ejd; |
ca589f94 | 2363 | int ret; |
3fb02738 | 2364 | |
1e2380cd RW |
2365 | if (ACPI_SUCCESS(acpi_bus_get_ejd(device->handle, &ejd))) |
2366 | register_dock_dependent_device(device, ejd); | |
2367 | ||
2c22e652 | 2368 | acpi_bus_get_status(device); |
202317a5 | 2369 | /* Skip devices that are not present. */ |
2c22e652 RW |
2370 | if (!acpi_device_is_present(device)) { |
2371 | device->flags.visited = false; | |
1b1f3e16 | 2372 | device->flags.power_manageable = 0; |
2c22e652 RW |
2373 | return; |
2374 | } | |
3a391a39 | 2375 | if (device->handler) |
2c22e652 | 2376 | goto ok; |
3a391a39 | 2377 | |
202317a5 | 2378 | if (!device->flags.initialized) { |
1b1f3e16 RW |
2379 | device->flags.power_manageable = |
2380 | device->power.states[ACPI_STATE_D0].flags.valid; | |
2381 | if (acpi_bus_init_power(device)) | |
2382 | device->flags.power_manageable = 0; | |
2383 | ||
202317a5 RW |
2384 | device->flags.initialized = true; |
2385 | } | |
2c22e652 | 2386 | device->flags.visited = false; |
ca589f94 | 2387 | ret = acpi_scan_attach_handler(device); |
6931007c | 2388 | if (ret < 0) |
2c22e652 | 2389 | return; |
6931007c RW |
2390 | |
2391 | device->flags.match_driver = true; | |
2c22e652 RW |
2392 | if (!ret) { |
2393 | ret = device_attach(&device->dev); | |
2394 | if (ret < 0) | |
2395 | return; | |
2396 | } | |
202317a5 | 2397 | device->flags.visited = true; |
202317a5 | 2398 | |
2c22e652 RW |
2399 | ok: |
2400 | list_for_each_entry(child, &device->children, node) | |
2401 | acpi_bus_attach(child); | |
8ab17fc9 RW |
2402 | |
2403 | if (device->handler && device->handler->hotplug.notify_online) | |
2404 | device->handler->hotplug.notify_online(device); | |
1da177e4 | 2405 | } |
1da177e4 | 2406 | |
40e7fcb1 LT |
2407 | void acpi_walk_dep_device_list(acpi_handle handle) |
2408 | { | |
2409 | struct acpi_dep_data *dep, *tmp; | |
2410 | struct acpi_device *adev; | |
2411 | ||
2412 | mutex_lock(&acpi_dep_list_lock); | |
2413 | list_for_each_entry_safe(dep, tmp, &acpi_dep_list, node) { | |
2414 | if (dep->master == handle) { | |
2415 | acpi_bus_get_device(dep->slave, &adev); | |
2416 | if (!adev) | |
2417 | continue; | |
2418 | ||
2419 | adev->dep_unmet--; | |
2420 | if (!adev->dep_unmet) | |
2421 | acpi_bus_attach(adev); | |
2422 | list_del(&dep->node); | |
2423 | kfree(dep); | |
2424 | } | |
2425 | } | |
2426 | mutex_unlock(&acpi_dep_list_lock); | |
2427 | } | |
2428 | EXPORT_SYMBOL_GPL(acpi_walk_dep_device_list); | |
2429 | ||
636458de | 2430 | /** |
b8bd759a | 2431 | * acpi_bus_scan - Add ACPI device node objects in a given namespace scope. |
636458de | 2432 | * @handle: Root of the namespace scope to scan. |
7779688f | 2433 | * |
636458de RW |
2434 | * Scan a given ACPI tree (probably recently hot-plugged) and create and add |
2435 | * found devices. | |
7779688f | 2436 | * |
636458de RW |
2437 | * If no devices were found, -ENODEV is returned, but it does not mean that |
2438 | * there has been a real error. There just have been no suitable ACPI objects | |
2439 | * in the table trunk from which the kernel could create a device and add an | |
2440 | * appropriate driver. | |
3757b948 RW |
2441 | * |
2442 | * Must be called under acpi_scan_lock. | |
7779688f | 2443 | */ |
b8bd759a | 2444 | int acpi_bus_scan(acpi_handle handle) |
3fb02738 | 2445 | { |
b8bd759a | 2446 | void *device = NULL; |
3fb02738 | 2447 | |
b8bd759a RW |
2448 | if (ACPI_SUCCESS(acpi_bus_check_add(handle, 0, NULL, &device))) |
2449 | acpi_walk_namespace(ACPI_TYPE_ANY, handle, ACPI_UINT32_MAX, | |
2450 | acpi_bus_check_add, NULL, NULL, &device); | |
3fb02738 | 2451 | |
2c22e652 RW |
2452 | if (device) { |
2453 | acpi_bus_attach(device); | |
2454 | return 0; | |
05404d8f | 2455 | } |
2c22e652 | 2456 | return -ENODEV; |
3fb02738 | 2457 | } |
2c22e652 | 2458 | EXPORT_SYMBOL(acpi_bus_scan); |
1da177e4 | 2459 | |
3757b948 | 2460 | /** |
2c22e652 RW |
2461 | * acpi_bus_trim - Detach scan handlers and drivers from ACPI device objects. |
2462 | * @adev: Root of the ACPI namespace scope to walk. | |
3757b948 RW |
2463 | * |
2464 | * Must be called under acpi_scan_lock. | |
2465 | */ | |
2c22e652 | 2466 | void acpi_bus_trim(struct acpi_device *adev) |
1da177e4 | 2467 | { |
2c22e652 RW |
2468 | struct acpi_scan_handler *handler = adev->handler; |
2469 | struct acpi_device *child; | |
2470 | ||
2471 | list_for_each_entry_reverse(child, &adev->children, node) | |
2472 | acpi_bus_trim(child); | |
2473 | ||
a951c773 | 2474 | adev->flags.match_driver = false; |
2c22e652 RW |
2475 | if (handler) { |
2476 | if (handler->detach) | |
2477 | handler->detach(adev); | |
2478 | ||
2479 | adev->handler = NULL; | |
2480 | } else { | |
2481 | device_release_driver(&adev->dev); | |
2482 | } | |
05404d8f | 2483 | /* |
2c22e652 RW |
2484 | * Most likely, the device is going away, so put it into D3cold before |
2485 | * that. | |
05404d8f | 2486 | */ |
2c22e652 RW |
2487 | acpi_device_set_power(adev, ACPI_STATE_D3_COLD); |
2488 | adev->flags.initialized = false; | |
2489 | adev->flags.visited = false; | |
1da177e4 | 2490 | } |
ceaba663 KA |
2491 | EXPORT_SYMBOL_GPL(acpi_bus_trim); |
2492 | ||
e8b945c9 | 2493 | static int acpi_bus_scan_fixed(void) |
1da177e4 | 2494 | { |
4be44fcd | 2495 | int result = 0; |
c4168bff | 2496 | |
1da177e4 LT |
2497 | /* |
2498 | * Enumerate all fixed-feature devices. | |
2499 | */ | |
2c0d4fe0 RW |
2500 | if (!(acpi_gbl_FADT.flags & ACPI_FADT_POWER_BUTTON)) { |
2501 | struct acpi_device *device = NULL; | |
2502 | ||
5c478f49 | 2503 | result = acpi_add_single_object(&device, NULL, |
c4168bff | 2504 | ACPI_BUS_TYPE_POWER_BUTTON, |
2c0d4fe0 RW |
2505 | ACPI_STA_DEFAULT); |
2506 | if (result) | |
2507 | return result; | |
2508 | ||
88346167 | 2509 | device->flags.match_driver = true; |
2c0d4fe0 RW |
2510 | result = device_attach(&device->dev); |
2511 | if (result < 0) | |
2512 | return result; | |
2513 | ||
c10d7a13 | 2514 | device_init_wakeup(&device->dev, true); |
3fb02738 | 2515 | } |
1da177e4 | 2516 | |
2c0d4fe0 RW |
2517 | if (!(acpi_gbl_FADT.flags & ACPI_FADT_SLEEP_BUTTON)) { |
2518 | struct acpi_device *device = NULL; | |
2519 | ||
5c478f49 | 2520 | result = acpi_add_single_object(&device, NULL, |
c4168bff | 2521 | ACPI_BUS_TYPE_SLEEP_BUTTON, |
2c0d4fe0 RW |
2522 | ACPI_STA_DEFAULT); |
2523 | if (result) | |
2524 | return result; | |
2525 | ||
88346167 | 2526 | device->flags.match_driver = true; |
2c0d4fe0 | 2527 | result = device_attach(&device->dev); |
3fb02738 | 2528 | } |
1da177e4 | 2529 | |
2c0d4fe0 | 2530 | return result < 0 ? result : 0; |
1da177e4 LT |
2531 | } |
2532 | ||
e747f274 | 2533 | int __init acpi_scan_init(void) |
1da177e4 LT |
2534 | { |
2535 | int result; | |
1da177e4 | 2536 | |
5b327265 PM |
2537 | result = bus_register(&acpi_bus_type); |
2538 | if (result) { | |
2539 | /* We don't want to quit even if we failed to add suspend/resume */ | |
2540 | printk(KERN_ERR PREFIX "Could not register bus type\n"); | |
2541 | } | |
2542 | ||
92ef2a25 | 2543 | acpi_pci_root_init(); |
4daeaf68 | 2544 | acpi_pci_link_init(); |
ac212b69 | 2545 | acpi_processor_init(); |
f58b082a | 2546 | acpi_lpss_init(); |
92082a88 | 2547 | acpi_apd_init(); |
2fa97feb | 2548 | acpi_cmos_rtc_init(); |
737f1a9f | 2549 | acpi_container_init(); |
0a347644 | 2550 | acpi_memory_hotplug_init(); |
eec15edb | 2551 | acpi_pnp_init(); |
3230bbfc | 2552 | acpi_int340x_thermal_init(); |
97d9a9e9 | 2553 | |
3757b948 | 2554 | mutex_lock(&acpi_scan_lock); |
1da177e4 LT |
2555 | /* |
2556 | * Enumerate devices in the ACPI namespace. | |
2557 | */ | |
0cd6ac52 RW |
2558 | result = acpi_bus_scan(ACPI_ROOT_OBJECT); |
2559 | if (result) | |
3757b948 | 2560 | goto out; |
1da177e4 | 2561 | |
0cd6ac52 | 2562 | result = acpi_bus_get_device(ACPI_ROOT_OBJECT, &acpi_root); |
1da177e4 | 2563 | if (result) |
3757b948 | 2564 | goto out; |
1da177e4 | 2565 | |
2650ef42 AL |
2566 | /* Fixed feature devices do not exist on HW-reduced platform */ |
2567 | if (!acpi_gbl_reduced_hardware) { | |
2568 | result = acpi_bus_scan_fixed(); | |
2569 | if (result) { | |
2570 | acpi_detach_data(acpi_root->handle, | |
2571 | acpi_scan_drop_device); | |
2572 | acpi_device_del(acpi_root); | |
2573 | put_device(&acpi_root->dev); | |
2574 | goto out; | |
2575 | } | |
b8bd759a | 2576 | } |
1da177e4 | 2577 | |
b8bd759a | 2578 | acpi_update_all_gpes(); |
3757b948 RW |
2579 | |
2580 | out: | |
2581 | mutex_unlock(&acpi_scan_lock); | |
2582 | return result; | |
1da177e4 | 2583 | } |