Commit | Line | Data |
---|---|---|
1da177e4 LT |
1 | /* |
2 | * scan.c - support for transforming the ACPI namespace into individual objects | |
3 | */ | |
4 | ||
5 | #include <linux/module.h> | |
6 | #include <linux/init.h> | |
5a0e3ad6 | 7 | #include <linux/slab.h> |
9b6d97b6 | 8 | #include <linux/kernel.h> |
1da177e4 | 9 | #include <linux/acpi.h> |
74523c90 AK |
10 | #include <linux/signal.h> |
11 | #include <linux/kthread.h> | |
222e82ac | 12 | #include <linux/dmi.h> |
d1efe3c3 | 13 | #include <linux/nls.h> |
1da177e4 | 14 | |
d783156e RW |
15 | #include <asm/pgtable.h> |
16 | ||
e60cc7a6 BH |
17 | #include "internal.h" |
18 | ||
1da177e4 | 19 | #define _COMPONENT ACPI_BUS_COMPONENT |
f52fd66d | 20 | ACPI_MODULE_NAME("scan"); |
4be44fcd | 21 | extern struct acpi_device *acpi_root; |
1da177e4 LT |
22 | |
23 | #define ACPI_BUS_CLASS "system_bus" | |
29b71a1c | 24 | #define ACPI_BUS_HID "LNXSYBUS" |
1da177e4 LT |
25 | #define ACPI_BUS_DEVICE_NAME "System Bus" |
26 | ||
859ac9a4 BH |
27 | #define ACPI_IS_ROOT_DEVICE(device) (!(device)->parent) |
28 | ||
d783156e RW |
29 | #define INVALID_ACPI_HANDLE ((acpi_handle)empty_zero_page) |
30 | ||
683058e3 RW |
31 | /* |
32 | * If set, devices will be hot-removed even if they cannot be put offline | |
33 | * gracefully (from the kernel's standpoint). | |
34 | */ | |
35 | bool acpi_force_hot_remove; | |
36 | ||
620e112c | 37 | static const char *dummy_hid = "device"; |
2b2ae7c7 | 38 | |
e49bd2dd | 39 | static LIST_HEAD(acpi_bus_id_list); |
c511cc19 | 40 | static DEFINE_MUTEX(acpi_scan_lock); |
ca589f94 | 41 | static LIST_HEAD(acpi_scan_handlers_list); |
9090589d | 42 | DEFINE_MUTEX(acpi_device_lock); |
1da177e4 | 43 | LIST_HEAD(acpi_wakeup_device_list); |
e525506f | 44 | static DEFINE_MUTEX(acpi_hp_context_lock); |
1da177e4 | 45 | |
e49bd2dd | 46 | struct acpi_device_bus_id{ |
bb095854 | 47 | char bus_id[15]; |
e49bd2dd ZR |
48 | unsigned int instance_no; |
49 | struct list_head node; | |
1da177e4 | 50 | }; |
29b71a1c | 51 | |
3757b948 RW |
52 | void acpi_scan_lock_acquire(void) |
53 | { | |
54 | mutex_lock(&acpi_scan_lock); | |
55 | } | |
56 | EXPORT_SYMBOL_GPL(acpi_scan_lock_acquire); | |
57 | ||
58 | void acpi_scan_lock_release(void) | |
59 | { | |
60 | mutex_unlock(&acpi_scan_lock); | |
61 | } | |
62 | EXPORT_SYMBOL_GPL(acpi_scan_lock_release); | |
63 | ||
e525506f RW |
64 | void acpi_lock_hp_context(void) |
65 | { | |
66 | mutex_lock(&acpi_hp_context_lock); | |
67 | } | |
68 | ||
69 | void acpi_unlock_hp_context(void) | |
70 | { | |
71 | mutex_unlock(&acpi_hp_context_lock); | |
72 | } | |
73 | ||
5d513205 RW |
74 | void acpi_initialize_hp_context(struct acpi_device *adev, |
75 | struct acpi_hotplug_context *hp, | |
76 | int (*notify)(struct acpi_device *, u32), | |
77 | void (*uevent)(struct acpi_device *, u32)) | |
78 | { | |
79 | acpi_lock_hp_context(); | |
ba574dc8 RW |
80 | hp->notify = notify; |
81 | hp->uevent = uevent; | |
82 | acpi_set_hp_context(adev, hp); | |
5d513205 RW |
83 | acpi_unlock_hp_context(); |
84 | } | |
85 | EXPORT_SYMBOL_GPL(acpi_initialize_hp_context); | |
86 | ||
ca589f94 RW |
87 | int acpi_scan_add_handler(struct acpi_scan_handler *handler) |
88 | { | |
d34afa9d | 89 | if (!handler) |
ca589f94 RW |
90 | return -EINVAL; |
91 | ||
92 | list_add_tail(&handler->list_node, &acpi_scan_handlers_list); | |
93 | return 0; | |
94 | } | |
95 | ||
3f8055c3 RW |
96 | int acpi_scan_add_handler_with_hotplug(struct acpi_scan_handler *handler, |
97 | const char *hotplug_profile_name) | |
98 | { | |
99 | int error; | |
100 | ||
101 | error = acpi_scan_add_handler(handler); | |
102 | if (error) | |
103 | return error; | |
104 | ||
105 | acpi_sysfs_add_hotplug_profile(&handler->hotplug, hotplug_profile_name); | |
106 | return 0; | |
107 | } | |
108 | ||
29b71a1c TR |
109 | /* |
110 | * Creates hid/cid(s) string needed for modalias and uevent | |
111 | * e.g. on a device with hid:IBM0001 and cid:ACPI0001 you get: | |
112 | * char *modalias: "acpi:IBM0001:ACPI0001" | |
3d8e0090 ZR |
113 | * Return: 0: no _HID and no _CID |
114 | * -EINVAL: output error | |
115 | * -ENOMEM: output is truncated | |
29b71a1c | 116 | */ |
b3e572d2 AB |
117 | static int create_modalias(struct acpi_device *acpi_dev, char *modalias, |
118 | int size) | |
119 | { | |
29b71a1c | 120 | int len; |
5c9fcb5d | 121 | int count; |
7f47fa6c | 122 | struct acpi_hardware_id *id; |
29b71a1c | 123 | |
2b2ae7c7 TR |
124 | if (list_empty(&acpi_dev->pnp.ids)) |
125 | return 0; | |
126 | ||
733e6251 MW |
127 | /* |
128 | * If the device has PRP0001 we expose DT compatible modalias | |
129 | * instead in form of of:NnameTCcompatible. | |
130 | */ | |
131 | if (acpi_dev->data.of_compatible) { | |
132 | struct acpi_buffer buf = { ACPI_ALLOCATE_BUFFER }; | |
133 | const union acpi_object *of_compatible, *obj; | |
134 | int i, nval; | |
135 | char *c; | |
136 | ||
137 | acpi_get_name(acpi_dev->handle, ACPI_SINGLE_NAME, &buf); | |
138 | /* DT strings are all in lower case */ | |
139 | for (c = buf.pointer; *c != '\0'; c++) | |
140 | *c = tolower(*c); | |
141 | ||
142 | len = snprintf(modalias, size, "of:N%sT", (char *)buf.pointer); | |
143 | ACPI_FREE(buf.pointer); | |
144 | ||
145 | of_compatible = acpi_dev->data.of_compatible; | |
146 | if (of_compatible->type == ACPI_TYPE_PACKAGE) { | |
147 | nval = of_compatible->package.count; | |
148 | obj = of_compatible->package.elements; | |
149 | } else { /* Must be ACPI_TYPE_STRING. */ | |
150 | nval = 1; | |
151 | obj = of_compatible; | |
152 | } | |
153 | for (i = 0; i < nval; i++, obj++) { | |
154 | count = snprintf(&modalias[len], size, "C%s", | |
155 | obj->string.pointer); | |
156 | if (count < 0) | |
157 | return -EINVAL; | |
158 | if (count >= size) | |
159 | return -ENOMEM; | |
160 | ||
161 | len += count; | |
162 | size -= count; | |
163 | } | |
164 | } else { | |
165 | len = snprintf(modalias, size, "acpi:"); | |
166 | size -= len; | |
167 | ||
168 | list_for_each_entry(id, &acpi_dev->pnp.ids, list) { | |
169 | count = snprintf(&modalias[len], size, "%s:", id->id); | |
170 | if (count < 0) | |
171 | return -EINVAL; | |
172 | if (count >= size) | |
173 | return -ENOMEM; | |
174 | len += count; | |
175 | size -= count; | |
176 | } | |
5c9fcb5d ZR |
177 | } |
178 | ||
29b71a1c TR |
179 | modalias[len] = '\0'; |
180 | return len; | |
181 | } | |
182 | ||
52870786 MW |
183 | /* |
184 | * acpi_companion_match() - Can we match via ACPI companion device | |
185 | * @dev: Device in question | |
186 | * | |
187 | * Check if the given device has an ACPI companion and if that companion has | |
188 | * a valid list of PNP IDs, and if the device is the first (primary) physical | |
189 | * device associated with it. | |
190 | * | |
191 | * If multiple physical devices are attached to a single ACPI companion, we need | |
192 | * to be careful. The usage scenario for this kind of relationship is that all | |
193 | * of the physical devices in question use resources provided by the ACPI | |
194 | * companion. A typical case is an MFD device where all the sub-devices share | |
195 | * the parent's ACPI companion. In such cases we can only allow the primary | |
196 | * (first) physical device to be matched with the help of the companion's PNP | |
197 | * IDs. | |
198 | * | |
199 | * Additional physical devices sharing the ACPI companion can still use | |
200 | * resources available from it but they will be matched normally using functions | |
201 | * provided by their bus types (and analogously for their modalias). | |
202 | */ | |
203 | static bool acpi_companion_match(const struct device *dev) | |
204 | { | |
205 | struct acpi_device *adev; | |
206 | bool ret; | |
207 | ||
208 | adev = ACPI_COMPANION(dev); | |
209 | if (!adev) | |
210 | return false; | |
211 | ||
212 | if (list_empty(&adev->pnp.ids)) | |
213 | return false; | |
214 | ||
215 | mutex_lock(&adev->physical_node_lock); | |
216 | if (list_empty(&adev->physical_node_list)) { | |
217 | ret = false; | |
218 | } else { | |
219 | const struct acpi_device_physical_node *node; | |
220 | ||
221 | node = list_first_entry(&adev->physical_node_list, | |
222 | struct acpi_device_physical_node, node); | |
223 | ret = node->dev == dev; | |
224 | } | |
225 | mutex_unlock(&adev->physical_node_lock); | |
226 | ||
227 | return ret; | |
228 | } | |
229 | ||
6eb2451f ZR |
230 | /* |
231 | * Creates uevent modalias field for ACPI enumerated devices. | |
232 | * Because the other buses does not support ACPI HIDs & CIDs. | |
233 | * e.g. for a device with hid:IBM0001 and cid:ACPI0001 you get: | |
234 | * "acpi:IBM0001:ACPI0001" | |
235 | */ | |
236 | int acpi_device_uevent_modalias(struct device *dev, struct kobj_uevent_env *env) | |
237 | { | |
6eb2451f ZR |
238 | int len; |
239 | ||
52870786 | 240 | if (!acpi_companion_match(dev)) |
6eb2451f ZR |
241 | return -ENODEV; |
242 | ||
243 | if (add_uevent_var(env, "MODALIAS=")) | |
244 | return -ENOMEM; | |
52870786 | 245 | len = create_modalias(ACPI_COMPANION(dev), &env->buf[env->buflen - 1], |
6eb2451f ZR |
246 | sizeof(env->buf) - env->buflen); |
247 | if (len <= 0) | |
248 | return len; | |
249 | env->buflen += len; | |
250 | return 0; | |
251 | } | |
252 | EXPORT_SYMBOL_GPL(acpi_device_uevent_modalias); | |
253 | ||
254 | /* | |
255 | * Creates modalias sysfs attribute for ACPI enumerated devices. | |
256 | * Because the other buses does not support ACPI HIDs & CIDs. | |
257 | * e.g. for a device with hid:IBM0001 and cid:ACPI0001 you get: | |
258 | * "acpi:IBM0001:ACPI0001" | |
259 | */ | |
260 | int acpi_device_modalias(struct device *dev, char *buf, int size) | |
261 | { | |
6eb2451f ZR |
262 | int len; |
263 | ||
52870786 | 264 | if (!acpi_companion_match(dev)) |
6eb2451f ZR |
265 | return -ENODEV; |
266 | ||
52870786 | 267 | len = create_modalias(ACPI_COMPANION(dev), buf, size -1); |
6eb2451f ZR |
268 | if (len <= 0) |
269 | return len; | |
270 | buf[len++] = '\n'; | |
271 | return len; | |
272 | } | |
273 | EXPORT_SYMBOL_GPL(acpi_device_modalias); | |
274 | ||
29b71a1c TR |
275 | static ssize_t |
276 | acpi_device_modalias_show(struct device *dev, struct device_attribute *attr, char *buf) { | |
277 | struct acpi_device *acpi_dev = to_acpi_device(dev); | |
278 | int len; | |
279 | ||
29b71a1c TR |
280 | len = create_modalias(acpi_dev, buf, 1024); |
281 | if (len <= 0) | |
3d8e0090 | 282 | return len; |
29b71a1c TR |
283 | buf[len++] = '\n'; |
284 | return len; | |
285 | } | |
286 | static DEVICE_ATTR(modalias, 0444, acpi_device_modalias_show, NULL); | |
287 | ||
caa73ea1 | 288 | bool acpi_scan_is_offline(struct acpi_device *adev, bool uevent) |
d22ddcbc RW |
289 | { |
290 | struct acpi_device_physical_node *pn; | |
291 | bool offline = true; | |
292 | ||
293 | mutex_lock(&adev->physical_node_lock); | |
294 | ||
295 | list_for_each_entry(pn, &adev->physical_node_list, node) | |
296 | if (device_supports_offline(pn->dev) && !pn->dev->offline) { | |
caa73ea1 RW |
297 | if (uevent) |
298 | kobject_uevent(&pn->dev->kobj, KOBJ_CHANGE); | |
299 | ||
d22ddcbc RW |
300 | offline = false; |
301 | break; | |
302 | } | |
303 | ||
304 | mutex_unlock(&adev->physical_node_lock); | |
305 | return offline; | |
306 | } | |
307 | ||
7f28ddec RW |
308 | static acpi_status acpi_bus_offline(acpi_handle handle, u32 lvl, void *data, |
309 | void **ret_p) | |
683058e3 RW |
310 | { |
311 | struct acpi_device *device = NULL; | |
312 | struct acpi_device_physical_node *pn; | |
303bfdb1 | 313 | bool second_pass = (bool)data; |
683058e3 RW |
314 | acpi_status status = AE_OK; |
315 | ||
316 | if (acpi_bus_get_device(handle, &device)) | |
317 | return AE_OK; | |
318 | ||
7f28ddec RW |
319 | if (device->handler && !device->handler->hotplug.enabled) { |
320 | *ret_p = &device->dev; | |
321 | return AE_SUPPORT; | |
322 | } | |
323 | ||
683058e3 RW |
324 | mutex_lock(&device->physical_node_lock); |
325 | ||
326 | list_for_each_entry(pn, &device->physical_node_list, node) { | |
327 | int ret; | |
328 | ||
303bfdb1 RW |
329 | if (second_pass) { |
330 | /* Skip devices offlined by the first pass. */ | |
331 | if (pn->put_online) | |
332 | continue; | |
333 | } else { | |
334 | pn->put_online = false; | |
335 | } | |
683058e3 RW |
336 | ret = device_offline(pn->dev); |
337 | if (acpi_force_hot_remove) | |
338 | continue; | |
339 | ||
303bfdb1 RW |
340 | if (ret >= 0) { |
341 | pn->put_online = !ret; | |
342 | } else { | |
343 | *ret_p = pn->dev; | |
344 | if (second_pass) { | |
345 | status = AE_ERROR; | |
346 | break; | |
347 | } | |
683058e3 | 348 | } |
683058e3 RW |
349 | } |
350 | ||
351 | mutex_unlock(&device->physical_node_lock); | |
352 | ||
353 | return status; | |
354 | } | |
355 | ||
7f28ddec RW |
356 | static acpi_status acpi_bus_online(acpi_handle handle, u32 lvl, void *data, |
357 | void **ret_p) | |
683058e3 RW |
358 | { |
359 | struct acpi_device *device = NULL; | |
360 | struct acpi_device_physical_node *pn; | |
361 | ||
362 | if (acpi_bus_get_device(handle, &device)) | |
363 | return AE_OK; | |
364 | ||
365 | mutex_lock(&device->physical_node_lock); | |
366 | ||
367 | list_for_each_entry(pn, &device->physical_node_list, node) | |
368 | if (pn->put_online) { | |
369 | device_online(pn->dev); | |
370 | pn->put_online = false; | |
371 | } | |
372 | ||
373 | mutex_unlock(&device->physical_node_lock); | |
374 | ||
375 | return AE_OK; | |
376 | } | |
377 | ||
d22ddcbc | 378 | static int acpi_scan_try_to_offline(struct acpi_device *device) |
1da177e4 | 379 | { |
5993c467 | 380 | acpi_handle handle = device->handle; |
d22ddcbc | 381 | struct device *errdev = NULL; |
a33ec399 | 382 | acpi_status status; |
f058cdf4 | 383 | |
303bfdb1 RW |
384 | /* |
385 | * Carry out two passes here and ignore errors in the first pass, | |
386 | * because if the devices in question are memory blocks and | |
387 | * CONFIG_MEMCG is set, one of the blocks may hold data structures | |
388 | * that the other blocks depend on, but it is not known in advance which | |
389 | * block holds them. | |
390 | * | |
391 | * If the first pass is successful, the second one isn't needed, though. | |
392 | */ | |
7f28ddec RW |
393 | status = acpi_walk_namespace(ACPI_TYPE_ANY, handle, ACPI_UINT32_MAX, |
394 | NULL, acpi_bus_offline, (void *)false, | |
395 | (void **)&errdev); | |
396 | if (status == AE_SUPPORT) { | |
397 | dev_warn(errdev, "Offline disabled.\n"); | |
398 | acpi_walk_namespace(ACPI_TYPE_ANY, handle, ACPI_UINT32_MAX, | |
399 | acpi_bus_online, NULL, NULL, NULL); | |
7f28ddec RW |
400 | return -EPERM; |
401 | } | |
402 | acpi_bus_offline(handle, 0, (void *)false, (void **)&errdev); | |
303bfdb1 RW |
403 | if (errdev) { |
404 | errdev = NULL; | |
683058e3 | 405 | acpi_walk_namespace(ACPI_TYPE_ANY, handle, ACPI_UINT32_MAX, |
7f28ddec RW |
406 | NULL, acpi_bus_offline, (void *)true, |
407 | (void **)&errdev); | |
303bfdb1 | 408 | if (!errdev || acpi_force_hot_remove) |
7f28ddec RW |
409 | acpi_bus_offline(handle, 0, (void *)true, |
410 | (void **)&errdev); | |
303bfdb1 RW |
411 | |
412 | if (errdev && !acpi_force_hot_remove) { | |
413 | dev_warn(errdev, "Offline failed.\n"); | |
7f28ddec | 414 | acpi_bus_online(handle, 0, NULL, NULL); |
303bfdb1 | 415 | acpi_walk_namespace(ACPI_TYPE_ANY, handle, |
7f28ddec RW |
416 | ACPI_UINT32_MAX, acpi_bus_online, |
417 | NULL, NULL, NULL); | |
303bfdb1 RW |
418 | return -EBUSY; |
419 | } | |
683058e3 | 420 | } |
d22ddcbc RW |
421 | return 0; |
422 | } | |
423 | ||
424 | static int acpi_scan_hot_remove(struct acpi_device *device) | |
425 | { | |
426 | acpi_handle handle = device->handle; | |
427 | unsigned long long sta; | |
428 | acpi_status status; | |
429 | ||
dee15926 TC |
430 | if (device->handler && device->handler->hotplug.demand_offline |
431 | && !acpi_force_hot_remove) { | |
caa73ea1 | 432 | if (!acpi_scan_is_offline(device, true)) |
d22ddcbc RW |
433 | return -EBUSY; |
434 | } else { | |
435 | int error = acpi_scan_try_to_offline(device); | |
436 | if (error) | |
437 | return error; | |
438 | } | |
683058e3 | 439 | |
26d46867 | 440 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
0794469d | 441 | "Hot-removing device %s...\n", dev_name(&device->dev))); |
26d46867 | 442 | |
bfee26db | 443 | acpi_bus_trim(device); |
683058e3 | 444 | |
7d2421f8 | 445 | acpi_evaluate_lck(handle, 0); |
1da177e4 LT |
446 | /* |
447 | * TBD: _EJD support. | |
448 | */ | |
7d2421f8 JL |
449 | status = acpi_evaluate_ej0(handle); |
450 | if (status == AE_NOT_FOUND) | |
451 | return -ENODEV; | |
452 | else if (ACPI_FAILURE(status)) | |
453 | return -EIO; | |
1da177e4 | 454 | |
882fd12e TK |
455 | /* |
456 | * Verify if eject was indeed successful. If not, log an error | |
457 | * message. No need to call _OST since _EJ0 call was made OK. | |
458 | */ | |
459 | status = acpi_evaluate_integer(handle, "_STA", NULL, &sta); | |
460 | if (ACPI_FAILURE(status)) { | |
461 | acpi_handle_warn(handle, | |
462 | "Status check after eject failed (0x%x)\n", status); | |
463 | } else if (sta & ACPI_STA_DEVICE_ENABLED) { | |
464 | acpi_handle_warn(handle, | |
465 | "Eject incomplete - status 0x%llx\n", sta); | |
466 | } | |
467 | ||
a33ec399 RW |
468 | return 0; |
469 | } | |
1da177e4 | 470 | |
443fc820 RW |
471 | static int acpi_scan_device_not_present(struct acpi_device *adev) |
472 | { | |
473 | if (!acpi_device_enumerated(adev)) { | |
474 | dev_warn(&adev->dev, "Still not present\n"); | |
475 | return -EALREADY; | |
476 | } | |
477 | acpi_bus_trim(adev); | |
478 | return 0; | |
479 | } | |
480 | ||
c27b2c33 | 481 | static int acpi_scan_device_check(struct acpi_device *adev) |
a33ec399 | 482 | { |
f943db40 | 483 | int error; |
a33ec399 | 484 | |
443fc820 RW |
485 | acpi_bus_get_status(adev); |
486 | if (adev->status.present || adev->status.functional) { | |
487 | /* | |
488 | * This function is only called for device objects for which | |
489 | * matching scan handlers exist. The only situation in which | |
490 | * the scan handler is not attached to this device object yet | |
491 | * is when the device has just appeared (either it wasn't | |
492 | * present at all before or it was removed and then added | |
493 | * again). | |
494 | */ | |
495 | if (adev->handler) { | |
496 | dev_warn(&adev->dev, "Already enumerated\n"); | |
497 | return -EALREADY; | |
498 | } | |
499 | error = acpi_bus_scan(adev->handle); | |
500 | if (error) { | |
501 | dev_warn(&adev->dev, "Namespace scan failure\n"); | |
502 | return error; | |
503 | } | |
504 | if (!adev->handler) { | |
505 | dev_warn(&adev->dev, "Enumeration failure\n"); | |
506 | error = -ENODEV; | |
507 | } | |
508 | } else { | |
509 | error = acpi_scan_device_not_present(adev); | |
510 | } | |
511 | return error; | |
512 | } | |
513 | ||
514 | static int acpi_scan_bus_check(struct acpi_device *adev) | |
515 | { | |
516 | struct acpi_scan_handler *handler = adev->handler; | |
517 | struct acpi_device *child; | |
518 | int error; | |
519 | ||
520 | acpi_bus_get_status(adev); | |
521 | if (!(adev->status.present || adev->status.functional)) { | |
522 | acpi_scan_device_not_present(adev); | |
523 | return 0; | |
524 | } | |
525 | if (handler && handler->hotplug.scan_dependent) | |
526 | return handler->hotplug.scan_dependent(adev); | |
527 | ||
c27b2c33 RW |
528 | error = acpi_bus_scan(adev->handle); |
529 | if (error) { | |
530 | dev_warn(&adev->dev, "Namespace scan failure\n"); | |
531 | return error; | |
532 | } | |
443fc820 RW |
533 | list_for_each_entry(child, &adev->children, node) { |
534 | error = acpi_scan_bus_check(child); | |
535 | if (error) | |
536 | return error; | |
c27b2c33 RW |
537 | } |
538 | return 0; | |
a33ec399 RW |
539 | } |
540 | ||
3c2cc7ff RW |
541 | static int acpi_generic_hotplug_event(struct acpi_device *adev, u32 type) |
542 | { | |
543 | switch (type) { | |
544 | case ACPI_NOTIFY_BUS_CHECK: | |
545 | return acpi_scan_bus_check(adev); | |
546 | case ACPI_NOTIFY_DEVICE_CHECK: | |
547 | return acpi_scan_device_check(adev); | |
548 | case ACPI_NOTIFY_EJECT_REQUEST: | |
549 | case ACPI_OST_EC_OSPM_EJECT: | |
dd2151be RW |
550 | if (adev->handler && !adev->handler->hotplug.enabled) { |
551 | dev_info(&adev->dev, "Eject disabled\n"); | |
552 | return -EPERM; | |
553 | } | |
700b8422 RW |
554 | acpi_evaluate_ost(adev->handle, ACPI_NOTIFY_EJECT_REQUEST, |
555 | ACPI_OST_SC_EJECT_IN_PROGRESS, NULL); | |
3c2cc7ff RW |
556 | return acpi_scan_hot_remove(adev); |
557 | } | |
558 | return -EINVAL; | |
559 | } | |
560 | ||
1e3bcb59 | 561 | void acpi_device_hotplug(struct acpi_device *adev, u32 src) |
a33ec399 | 562 | { |
a33ec399 | 563 | u32 ost_code = ACPI_OST_SC_NON_SPECIFIC_FAILURE; |
3c2cc7ff | 564 | int error = -ENODEV; |
a33ec399 | 565 | |
683058e3 | 566 | lock_device_hotplug(); |
e0ae8fee | 567 | mutex_lock(&acpi_scan_lock); |
a33ec399 | 568 | |
c27b2c33 RW |
569 | /* |
570 | * The device object's ACPI handle cannot become invalid as long as we | |
3c2cc7ff | 571 | * are holding acpi_scan_lock, but it might have become invalid before |
c27b2c33 RW |
572 | * that lock was acquired. |
573 | */ | |
574 | if (adev->handle == INVALID_ACPI_HANDLE) | |
3c2cc7ff | 575 | goto err_out; |
c27b2c33 | 576 | |
1e2380cd RW |
577 | if (adev->flags.is_dock_station) { |
578 | error = dock_notify(adev, src); | |
579 | } else if (adev->flags.hotplug_notify) { | |
3c2cc7ff | 580 | error = acpi_generic_hotplug_event(adev, src); |
dd2151be RW |
581 | if (error == -EPERM) { |
582 | ost_code = ACPI_OST_SC_EJECT_NOT_SUPPORTED; | |
583 | goto err_out; | |
584 | } | |
3c2cc7ff | 585 | } else { |
be27b3dc | 586 | int (*notify)(struct acpi_device *, u32); |
3c2cc7ff RW |
587 | |
588 | acpi_lock_hp_context(); | |
be27b3dc | 589 | notify = adev->hp ? adev->hp->notify : NULL; |
3c2cc7ff RW |
590 | acpi_unlock_hp_context(); |
591 | /* | |
592 | * There may be additional notify handlers for device objects | |
593 | * without the .event() callback, so ignore them here. | |
594 | */ | |
be27b3dc RW |
595 | if (notify) |
596 | error = notify(adev, src); | |
3c2cc7ff RW |
597 | else |
598 | goto out; | |
a33ec399 | 599 | } |
c27b2c33 RW |
600 | if (!error) |
601 | ost_code = ACPI_OST_SC_SUCCESS; | |
a33ec399 | 602 | |
3c2cc7ff | 603 | err_out: |
700b8422 | 604 | acpi_evaluate_ost(adev->handle, src, ost_code, NULL); |
3c2cc7ff RW |
605 | |
606 | out: | |
78ea4639 | 607 | acpi_bus_put_acpi_device(adev); |
a33ec399 | 608 | mutex_unlock(&acpi_scan_lock); |
e0ae8fee | 609 | unlock_device_hotplug(); |
a33ec399 RW |
610 | } |
611 | ||
836aedb1 RW |
612 | static ssize_t real_power_state_show(struct device *dev, |
613 | struct device_attribute *attr, char *buf) | |
614 | { | |
615 | struct acpi_device *adev = to_acpi_device(dev); | |
616 | int state; | |
617 | int ret; | |
618 | ||
619 | ret = acpi_device_get_power(adev, &state); | |
620 | if (ret) | |
621 | return ret; | |
622 | ||
623 | return sprintf(buf, "%s\n", acpi_power_state_string(state)); | |
624 | } | |
625 | ||
626 | static DEVICE_ATTR(real_power_state, 0444, real_power_state_show, NULL); | |
627 | ||
628 | static ssize_t power_state_show(struct device *dev, | |
629 | struct device_attribute *attr, char *buf) | |
630 | { | |
631 | struct acpi_device *adev = to_acpi_device(dev); | |
632 | ||
633 | return sprintf(buf, "%s\n", acpi_power_state_string(adev->power.state)); | |
634 | } | |
635 | ||
636 | static DEVICE_ATTR(power_state, 0444, power_state_show, NULL); | |
637 | ||
1da177e4 | 638 | static ssize_t |
f883d9db PM |
639 | acpi_eject_store(struct device *d, struct device_attribute *attr, |
640 | const char *buf, size_t count) | |
1da177e4 | 641 | { |
f883d9db | 642 | struct acpi_device *acpi_device = to_acpi_device(d); |
a33ec399 RW |
643 | acpi_object_type not_used; |
644 | acpi_status status; | |
1da177e4 | 645 | |
a33ec399 | 646 | if (!count || buf[0] != '1') |
1da177e4 | 647 | return -EINVAL; |
1da177e4 | 648 | |
a33ec399 RW |
649 | if ((!acpi_device->handler || !acpi_device->handler->hotplug.enabled) |
650 | && !acpi_device->driver) | |
651 | return -ENODEV; | |
652 | ||
653 | status = acpi_get_type(acpi_device->handle, ¬_used); | |
654 | if (ACPI_FAILURE(status) || !acpi_device->flags.ejectable) | |
655 | return -ENODEV; | |
656 | ||
a33ec399 | 657 | get_device(&acpi_device->dev); |
1e3bcb59 | 658 | status = acpi_hotplug_schedule(acpi_device, ACPI_OST_EC_OSPM_EJECT); |
f943db40 RW |
659 | if (ACPI_SUCCESS(status)) |
660 | return count; | |
a33ec399 | 661 | |
f943db40 | 662 | put_device(&acpi_device->dev); |
700b8422 RW |
663 | acpi_evaluate_ost(acpi_device->handle, ACPI_OST_EC_OSPM_EJECT, |
664 | ACPI_OST_SC_NON_SPECIFIC_FAILURE, NULL); | |
5add99cf | 665 | return status == AE_NO_MEMORY ? -ENOMEM : -EAGAIN; |
1da177e4 LT |
666 | } |
667 | ||
f883d9db | 668 | static DEVICE_ATTR(eject, 0200, NULL, acpi_eject_store); |
1da177e4 | 669 | |
e49bd2dd ZR |
670 | static ssize_t |
671 | acpi_device_hid_show(struct device *dev, struct device_attribute *attr, char *buf) { | |
672 | struct acpi_device *acpi_dev = to_acpi_device(dev); | |
1da177e4 | 673 | |
ea8d82fd | 674 | return sprintf(buf, "%s\n", acpi_device_hid(acpi_dev)); |
1da177e4 | 675 | } |
e49bd2dd | 676 | static DEVICE_ATTR(hid, 0444, acpi_device_hid_show, NULL); |
1da177e4 | 677 | |
923d4a45 LZ |
678 | static ssize_t acpi_device_uid_show(struct device *dev, |
679 | struct device_attribute *attr, char *buf) | |
680 | { | |
681 | struct acpi_device *acpi_dev = to_acpi_device(dev); | |
682 | ||
683 | return sprintf(buf, "%s\n", acpi_dev->pnp.unique_id); | |
684 | } | |
685 | static DEVICE_ATTR(uid, 0444, acpi_device_uid_show, NULL); | |
686 | ||
687 | static ssize_t acpi_device_adr_show(struct device *dev, | |
688 | struct device_attribute *attr, char *buf) | |
689 | { | |
690 | struct acpi_device *acpi_dev = to_acpi_device(dev); | |
691 | ||
692 | return sprintf(buf, "0x%08x\n", | |
693 | (unsigned int)(acpi_dev->pnp.bus_address)); | |
694 | } | |
695 | static DEVICE_ATTR(adr, 0444, acpi_device_adr_show, NULL); | |
696 | ||
e49bd2dd ZR |
697 | static ssize_t |
698 | acpi_device_path_show(struct device *dev, struct device_attribute *attr, char *buf) { | |
699 | struct acpi_device *acpi_dev = to_acpi_device(dev); | |
700 | struct acpi_buffer path = {ACPI_ALLOCATE_BUFFER, NULL}; | |
701 | int result; | |
1da177e4 | 702 | |
e49bd2dd | 703 | result = acpi_get_name(acpi_dev->handle, ACPI_FULL_PATHNAME, &path); |
0c526d96 | 704 | if (result) |
e49bd2dd | 705 | goto end; |
1da177e4 | 706 | |
e49bd2dd ZR |
707 | result = sprintf(buf, "%s\n", (char*)path.pointer); |
708 | kfree(path.pointer); | |
0c526d96 | 709 | end: |
e49bd2dd | 710 | return result; |
1da177e4 | 711 | } |
e49bd2dd | 712 | static DEVICE_ATTR(path, 0444, acpi_device_path_show, NULL); |
1da177e4 | 713 | |
d1efe3c3 LO |
714 | /* sysfs file that shows description text from the ACPI _STR method */ |
715 | static ssize_t description_show(struct device *dev, | |
716 | struct device_attribute *attr, | |
717 | char *buf) { | |
718 | struct acpi_device *acpi_dev = to_acpi_device(dev); | |
719 | int result; | |
720 | ||
721 | if (acpi_dev->pnp.str_obj == NULL) | |
722 | return 0; | |
723 | ||
724 | /* | |
725 | * The _STR object contains a Unicode identifier for a device. | |
726 | * We need to convert to utf-8 so it can be displayed. | |
727 | */ | |
728 | result = utf16s_to_utf8s( | |
729 | (wchar_t *)acpi_dev->pnp.str_obj->buffer.pointer, | |
730 | acpi_dev->pnp.str_obj->buffer.length, | |
731 | UTF16_LITTLE_ENDIAN, buf, | |
732 | PAGE_SIZE); | |
733 | ||
734 | buf[result++] = '\n'; | |
735 | ||
736 | return result; | |
737 | } | |
738 | static DEVICE_ATTR(description, 0444, description_show, NULL); | |
739 | ||
bb74ac23 YI |
740 | static ssize_t |
741 | acpi_device_sun_show(struct device *dev, struct device_attribute *attr, | |
742 | char *buf) { | |
743 | struct acpi_device *acpi_dev = to_acpi_device(dev); | |
a383b68d YI |
744 | acpi_status status; |
745 | unsigned long long sun; | |
bb74ac23 | 746 | |
a383b68d YI |
747 | status = acpi_evaluate_integer(acpi_dev->handle, "_SUN", NULL, &sun); |
748 | if (ACPI_FAILURE(status)) | |
749 | return -ENODEV; | |
750 | ||
751 | return sprintf(buf, "%llu\n", sun); | |
bb74ac23 YI |
752 | } |
753 | static DEVICE_ATTR(sun, 0444, acpi_device_sun_show, NULL); | |
754 | ||
c713cd7f SP |
755 | static ssize_t status_show(struct device *dev, struct device_attribute *attr, |
756 | char *buf) { | |
757 | struct acpi_device *acpi_dev = to_acpi_device(dev); | |
758 | acpi_status status; | |
759 | unsigned long long sta; | |
760 | ||
761 | status = acpi_evaluate_integer(acpi_dev->handle, "_STA", NULL, &sta); | |
762 | if (ACPI_FAILURE(status)) | |
763 | return -ENODEV; | |
764 | ||
765 | return sprintf(buf, "%llu\n", sta); | |
766 | } | |
767 | static DEVICE_ATTR_RO(status); | |
768 | ||
e49bd2dd | 769 | static int acpi_device_setup_files(struct acpi_device *dev) |
1da177e4 | 770 | { |
d1efe3c3 | 771 | struct acpi_buffer buffer = {ACPI_ALLOCATE_BUFFER, NULL}; |
f883d9db | 772 | acpi_status status; |
e49bd2dd | 773 | int result = 0; |
1da177e4 LT |
774 | |
775 | /* | |
e49bd2dd | 776 | * Devices gotten from FADT don't have a "path" attribute |
1da177e4 | 777 | */ |
0c526d96 | 778 | if (dev->handle) { |
e49bd2dd | 779 | result = device_create_file(&dev->dev, &dev_attr_path); |
0c526d96 | 780 | if (result) |
e49bd2dd | 781 | goto end; |
1da177e4 LT |
782 | } |
783 | ||
2b2ae7c7 TR |
784 | if (!list_empty(&dev->pnp.ids)) { |
785 | result = device_create_file(&dev->dev, &dev_attr_hid); | |
786 | if (result) | |
787 | goto end; | |
1da177e4 | 788 | |
2b2ae7c7 TR |
789 | result = device_create_file(&dev->dev, &dev_attr_modalias); |
790 | if (result) | |
791 | goto end; | |
792 | } | |
29b71a1c | 793 | |
d1efe3c3 LO |
794 | /* |
795 | * If device has _STR, 'description' file is created | |
796 | */ | |
952c63e9 | 797 | if (acpi_has_method(dev->handle, "_STR")) { |
d1efe3c3 LO |
798 | status = acpi_evaluate_object(dev->handle, "_STR", |
799 | NULL, &buffer); | |
800 | if (ACPI_FAILURE(status)) | |
801 | buffer.pointer = NULL; | |
802 | dev->pnp.str_obj = buffer.pointer; | |
803 | result = device_create_file(&dev->dev, &dev_attr_description); | |
804 | if (result) | |
805 | goto end; | |
806 | } | |
807 | ||
d4e1a692 | 808 | if (dev->pnp.type.bus_address) |
923d4a45 LZ |
809 | result = device_create_file(&dev->dev, &dev_attr_adr); |
810 | if (dev->pnp.unique_id) | |
811 | result = device_create_file(&dev->dev, &dev_attr_uid); | |
812 | ||
a383b68d | 813 | if (acpi_has_method(dev->handle, "_SUN")) { |
bb74ac23 YI |
814 | result = device_create_file(&dev->dev, &dev_attr_sun); |
815 | if (result) | |
816 | goto end; | |
bb74ac23 YI |
817 | } |
818 | ||
c713cd7f SP |
819 | if (acpi_has_method(dev->handle, "_STA")) { |
820 | result = device_create_file(&dev->dev, &dev_attr_status); | |
821 | if (result) | |
822 | goto end; | |
823 | } | |
824 | ||
e49bd2dd ZR |
825 | /* |
826 | * If device has _EJ0, 'eject' file is created that is used to trigger | |
827 | * hot-removal function from userland. | |
828 | */ | |
952c63e9 | 829 | if (acpi_has_method(dev->handle, "_EJ0")) { |
e49bd2dd | 830 | result = device_create_file(&dev->dev, &dev_attr_eject); |
836aedb1 RW |
831 | if (result) |
832 | return result; | |
833 | } | |
834 | ||
835 | if (dev->flags.power_manageable) { | |
836 | result = device_create_file(&dev->dev, &dev_attr_power_state); | |
837 | if (result) | |
838 | return result; | |
839 | ||
840 | if (dev->power.flags.power_resources) | |
841 | result = device_create_file(&dev->dev, | |
842 | &dev_attr_real_power_state); | |
843 | } | |
844 | ||
0c526d96 | 845 | end: |
e49bd2dd | 846 | return result; |
1da177e4 LT |
847 | } |
848 | ||
f883d9db | 849 | static void acpi_device_remove_files(struct acpi_device *dev) |
1da177e4 | 850 | { |
836aedb1 RW |
851 | if (dev->flags.power_manageable) { |
852 | device_remove_file(&dev->dev, &dev_attr_power_state); | |
853 | if (dev->power.flags.power_resources) | |
854 | device_remove_file(&dev->dev, | |
855 | &dev_attr_real_power_state); | |
856 | } | |
857 | ||
f883d9db | 858 | /* |
d1efe3c3 LO |
859 | * If device has _STR, remove 'description' file |
860 | */ | |
952c63e9 | 861 | if (acpi_has_method(dev->handle, "_STR")) { |
d1efe3c3 LO |
862 | kfree(dev->pnp.str_obj); |
863 | device_remove_file(&dev->dev, &dev_attr_description); | |
864 | } | |
865 | /* | |
866 | * If device has _EJ0, remove 'eject' file. | |
f883d9db | 867 | */ |
952c63e9 | 868 | if (acpi_has_method(dev->handle, "_EJ0")) |
f883d9db | 869 | device_remove_file(&dev->dev, &dev_attr_eject); |
1da177e4 | 870 | |
952c63e9 | 871 | if (acpi_has_method(dev->handle, "_SUN")) |
bb74ac23 YI |
872 | device_remove_file(&dev->dev, &dev_attr_sun); |
873 | ||
923d4a45 LZ |
874 | if (dev->pnp.unique_id) |
875 | device_remove_file(&dev->dev, &dev_attr_uid); | |
d4e1a692 | 876 | if (dev->pnp.type.bus_address) |
923d4a45 | 877 | device_remove_file(&dev->dev, &dev_attr_adr); |
1131b938 BH |
878 | device_remove_file(&dev->dev, &dev_attr_modalias); |
879 | device_remove_file(&dev->dev, &dev_attr_hid); | |
c713cd7f SP |
880 | if (acpi_has_method(dev->handle, "_STA")) |
881 | device_remove_file(&dev->dev, &dev_attr_status); | |
0c526d96 | 882 | if (dev->handle) |
e49bd2dd | 883 | device_remove_file(&dev->dev, &dev_attr_path); |
1da177e4 | 884 | } |
1da177e4 | 885 | /* -------------------------------------------------------------------------- |
9e89dde2 | 886 | ACPI Bus operations |
1da177e4 | 887 | -------------------------------------------------------------------------- */ |
29b71a1c | 888 | |
cf761af9 MW |
889 | static const struct acpi_device_id *__acpi_match_device( |
890 | struct acpi_device *device, const struct acpi_device_id *ids) | |
29b71a1c TR |
891 | { |
892 | const struct acpi_device_id *id; | |
7f47fa6c | 893 | struct acpi_hardware_id *hwid; |
29b71a1c | 894 | |
39a0ad87 ZY |
895 | /* |
896 | * If the device is not present, it is unnecessary to load device | |
897 | * driver for it. | |
898 | */ | |
899 | if (!device->status.present) | |
cf761af9 | 900 | return NULL; |
39a0ad87 | 901 | |
7f47fa6c BH |
902 | for (id = ids; id->id[0]; id++) |
903 | list_for_each_entry(hwid, &device->pnp.ids, list) | |
904 | if (!strcmp((char *) id->id, hwid->id)) | |
cf761af9 MW |
905 | return id; |
906 | ||
907 | return NULL; | |
908 | } | |
909 | ||
910 | /** | |
911 | * acpi_match_device - Match a struct device against a given list of ACPI IDs | |
912 | * @ids: Array of struct acpi_device_id object to match against. | |
913 | * @dev: The device structure to match. | |
914 | * | |
915 | * Check if @dev has a valid ACPI handle and if there is a struct acpi_device | |
916 | * object for that handle and use that object to match against a given list of | |
917 | * device IDs. | |
918 | * | |
919 | * Return a pointer to the first matching ID on success or %NULL on failure. | |
920 | */ | |
921 | const struct acpi_device_id *acpi_match_device(const struct acpi_device_id *ids, | |
922 | const struct device *dev) | |
923 | { | |
924 | struct acpi_device *adev; | |
0613e1f7 | 925 | acpi_handle handle = ACPI_HANDLE(dev); |
cf761af9 | 926 | |
0613e1f7 | 927 | if (!ids || !handle || acpi_bus_get_device(handle, &adev)) |
cf761af9 MW |
928 | return NULL; |
929 | ||
52870786 MW |
930 | if (!acpi_companion_match(dev)) |
931 | return NULL; | |
932 | ||
cf761af9 MW |
933 | return __acpi_match_device(adev, ids); |
934 | } | |
935 | EXPORT_SYMBOL_GPL(acpi_match_device); | |
29b71a1c | 936 | |
cf761af9 MW |
937 | int acpi_match_device_ids(struct acpi_device *device, |
938 | const struct acpi_device_id *ids) | |
939 | { | |
940 | return __acpi_match_device(device, ids) ? 0 : -ENOENT; | |
29b71a1c TR |
941 | } |
942 | EXPORT_SYMBOL(acpi_match_device_ids); | |
943 | ||
733e6251 MW |
944 | /* Performs match against special "PRP0001" shoehorn ACPI ID */ |
945 | static bool acpi_of_driver_match_device(struct device *dev, | |
946 | const struct device_driver *drv) | |
947 | { | |
948 | const union acpi_object *of_compatible, *obj; | |
949 | struct acpi_device *adev; | |
950 | int i, nval; | |
951 | ||
952 | adev = ACPI_COMPANION(dev); | |
953 | if (!adev) | |
954 | return false; | |
955 | ||
956 | of_compatible = adev->data.of_compatible; | |
957 | if (!drv->of_match_table || !of_compatible) | |
958 | return false; | |
959 | ||
960 | if (of_compatible->type == ACPI_TYPE_PACKAGE) { | |
961 | nval = of_compatible->package.count; | |
962 | obj = of_compatible->package.elements; | |
963 | } else { /* Must be ACPI_TYPE_STRING. */ | |
964 | nval = 1; | |
965 | obj = of_compatible; | |
966 | } | |
967 | /* Now we can look for the driver DT compatible strings */ | |
968 | for (i = 0; i < nval; i++, obj++) { | |
969 | const struct of_device_id *id; | |
970 | ||
971 | for (id = drv->of_match_table; id->compatible[0]; id++) | |
972 | if (!strcasecmp(obj->string.pointer, id->compatible)) | |
973 | return true; | |
974 | } | |
975 | ||
976 | return false; | |
977 | } | |
978 | ||
979 | bool acpi_driver_match_device(struct device *dev, | |
980 | const struct device_driver *drv) | |
981 | { | |
982 | if (!drv->acpi_match_table) | |
983 | return acpi_of_driver_match_device(dev, drv); | |
984 | ||
985 | return !!acpi_match_device(drv->acpi_match_table, dev); | |
986 | } | |
987 | EXPORT_SYMBOL_GPL(acpi_driver_match_device); | |
988 | ||
0b224527 RW |
989 | static void acpi_free_power_resources_lists(struct acpi_device *device) |
990 | { | |
991 | int i; | |
992 | ||
993cbe59 RW |
993 | if (device->wakeup.flags.valid) |
994 | acpi_power_resources_list_free(&device->wakeup.resources); | |
995 | ||
0b224527 RW |
996 | if (!device->flags.power_manageable) |
997 | return; | |
998 | ||
999 | for (i = ACPI_STATE_D0; i <= ACPI_STATE_D3_HOT; i++) { | |
1000 | struct acpi_device_power_state *ps = &device->power.states[i]; | |
1001 | acpi_power_resources_list_free(&ps->resources); | |
1002 | } | |
7f47fa6c BH |
1003 | } |
1004 | ||
1890a97a | 1005 | static void acpi_device_release(struct device *dev) |
1da177e4 | 1006 | { |
1890a97a | 1007 | struct acpi_device *acpi_dev = to_acpi_device(dev); |
1da177e4 | 1008 | |
ffdcd955 | 1009 | acpi_free_properties(acpi_dev); |
c0af4175 | 1010 | acpi_free_pnp_ids(&acpi_dev->pnp); |
0b224527 | 1011 | acpi_free_power_resources_lists(acpi_dev); |
1890a97a | 1012 | kfree(acpi_dev); |
1da177e4 LT |
1013 | } |
1014 | ||
5d9464a4 | 1015 | static int acpi_bus_match(struct device *dev, struct device_driver *drv) |
9e89dde2 | 1016 | { |
5d9464a4 PM |
1017 | struct acpi_device *acpi_dev = to_acpi_device(dev); |
1018 | struct acpi_driver *acpi_drv = to_acpi_driver(drv); | |
1da177e4 | 1019 | |
209d3b17 | 1020 | return acpi_dev->flags.match_driver |
805d410f | 1021 | && !acpi_match_device_ids(acpi_dev, acpi_drv->ids); |
5d9464a4 | 1022 | } |
1da177e4 | 1023 | |
7eff2e7a | 1024 | static int acpi_device_uevent(struct device *dev, struct kobj_uevent_env *env) |
1da177e4 | 1025 | { |
5d9464a4 | 1026 | struct acpi_device *acpi_dev = to_acpi_device(dev); |
7eff2e7a | 1027 | int len; |
5d9464a4 | 1028 | |
2b2ae7c7 TR |
1029 | if (list_empty(&acpi_dev->pnp.ids)) |
1030 | return 0; | |
1031 | ||
7eff2e7a KS |
1032 | if (add_uevent_var(env, "MODALIAS=")) |
1033 | return -ENOMEM; | |
1034 | len = create_modalias(acpi_dev, &env->buf[env->buflen - 1], | |
1035 | sizeof(env->buf) - env->buflen); | |
3d8e0090 ZR |
1036 | if (len <= 0) |
1037 | return len; | |
7eff2e7a | 1038 | env->buflen += len; |
9e89dde2 | 1039 | return 0; |
1da177e4 LT |
1040 | } |
1041 | ||
46ec8598 BH |
1042 | static void acpi_device_notify(acpi_handle handle, u32 event, void *data) |
1043 | { | |
1044 | struct acpi_device *device = data; | |
1045 | ||
1046 | device->driver->ops.notify(device, event); | |
1047 | } | |
1048 | ||
236105db | 1049 | static void acpi_device_notify_fixed(void *data) |
46ec8598 BH |
1050 | { |
1051 | struct acpi_device *device = data; | |
1052 | ||
53de5356 BH |
1053 | /* Fixed hardware devices have no handles */ |
1054 | acpi_device_notify(NULL, ACPI_FIXED_HARDWARE_EVENT, device); | |
236105db LT |
1055 | } |
1056 | ||
1057 | static acpi_status acpi_device_fixed_event(void *data) | |
1058 | { | |
1059 | acpi_os_execute(OSL_NOTIFY_HANDLER, acpi_device_notify_fixed, data); | |
46ec8598 BH |
1060 | return AE_OK; |
1061 | } | |
1062 | ||
1063 | static int acpi_device_install_notify_handler(struct acpi_device *device) | |
1064 | { | |
1065 | acpi_status status; | |
46ec8598 | 1066 | |
ccba2a36 | 1067 | if (device->device_type == ACPI_BUS_TYPE_POWER_BUTTON) |
46ec8598 BH |
1068 | status = |
1069 | acpi_install_fixed_event_handler(ACPI_EVENT_POWER_BUTTON, | |
236105db | 1070 | acpi_device_fixed_event, |
46ec8598 | 1071 | device); |
ccba2a36 | 1072 | else if (device->device_type == ACPI_BUS_TYPE_SLEEP_BUTTON) |
46ec8598 BH |
1073 | status = |
1074 | acpi_install_fixed_event_handler(ACPI_EVENT_SLEEP_BUTTON, | |
236105db | 1075 | acpi_device_fixed_event, |
46ec8598 BH |
1076 | device); |
1077 | else | |
1078 | status = acpi_install_notify_handler(device->handle, | |
1079 | ACPI_DEVICE_NOTIFY, | |
1080 | acpi_device_notify, | |
1081 | device); | |
1082 | ||
1083 | if (ACPI_FAILURE(status)) | |
1084 | return -EINVAL; | |
1085 | return 0; | |
1086 | } | |
1087 | ||
1088 | static void acpi_device_remove_notify_handler(struct acpi_device *device) | |
1089 | { | |
ccba2a36 | 1090 | if (device->device_type == ACPI_BUS_TYPE_POWER_BUTTON) |
46ec8598 | 1091 | acpi_remove_fixed_event_handler(ACPI_EVENT_POWER_BUTTON, |
236105db | 1092 | acpi_device_fixed_event); |
ccba2a36 | 1093 | else if (device->device_type == ACPI_BUS_TYPE_SLEEP_BUTTON) |
46ec8598 | 1094 | acpi_remove_fixed_event_handler(ACPI_EVENT_SLEEP_BUTTON, |
236105db | 1095 | acpi_device_fixed_event); |
46ec8598 BH |
1096 | else |
1097 | acpi_remove_notify_handler(device->handle, ACPI_DEVICE_NOTIFY, | |
1098 | acpi_device_notify); | |
1099 | } | |
1100 | ||
d9e455f5 | 1101 | static int acpi_device_probe(struct device *dev) |
1da177e4 | 1102 | { |
5d9464a4 PM |
1103 | struct acpi_device *acpi_dev = to_acpi_device(dev); |
1104 | struct acpi_driver *acpi_drv = to_acpi_driver(dev->driver); | |
1105 | int ret; | |
1106 | ||
fc2e0a83 | 1107 | if (acpi_dev->handler && !acpi_is_pnp_device(acpi_dev)) |
24071f47 RW |
1108 | return -EINVAL; |
1109 | ||
d9e455f5 RW |
1110 | if (!acpi_drv->ops.add) |
1111 | return -ENOSYS; | |
46ec8598 | 1112 | |
d9e455f5 RW |
1113 | ret = acpi_drv->ops.add(acpi_dev); |
1114 | if (ret) | |
1115 | return ret; | |
46ec8598 | 1116 | |
d9e455f5 RW |
1117 | acpi_dev->driver = acpi_drv; |
1118 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, | |
1119 | "Driver [%s] successfully bound to device [%s]\n", | |
1120 | acpi_drv->name, acpi_dev->pnp.bus_id)); | |
1121 | ||
1122 | if (acpi_drv->ops.notify) { | |
1123 | ret = acpi_device_install_notify_handler(acpi_dev); | |
1124 | if (ret) { | |
1125 | if (acpi_drv->ops.remove) | |
1126 | acpi_drv->ops.remove(acpi_dev); | |
1127 | ||
1128 | acpi_dev->driver = NULL; | |
1129 | acpi_dev->driver_data = NULL; | |
1130 | return ret; | |
1131 | } | |
5d9464a4 | 1132 | } |
d9e455f5 RW |
1133 | |
1134 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Found driver [%s] for device [%s]\n", | |
1135 | acpi_drv->name, acpi_dev->pnp.bus_id)); | |
1136 | get_device(dev); | |
1137 | return 0; | |
5d9464a4 | 1138 | } |
1da177e4 | 1139 | |
5d9464a4 PM |
1140 | static int acpi_device_remove(struct device * dev) |
1141 | { | |
1142 | struct acpi_device *acpi_dev = to_acpi_device(dev); | |
1143 | struct acpi_driver *acpi_drv = acpi_dev->driver; | |
1144 | ||
1145 | if (acpi_drv) { | |
46ec8598 BH |
1146 | if (acpi_drv->ops.notify) |
1147 | acpi_device_remove_notify_handler(acpi_dev); | |
5d9464a4 | 1148 | if (acpi_drv->ops.remove) |
51fac838 | 1149 | acpi_drv->ops.remove(acpi_dev); |
1da177e4 | 1150 | } |
5d9464a4 | 1151 | acpi_dev->driver = NULL; |
db89b4f0 | 1152 | acpi_dev->driver_data = NULL; |
1da177e4 | 1153 | |
5d9464a4 | 1154 | put_device(dev); |
9e89dde2 ZR |
1155 | return 0; |
1156 | } | |
1da177e4 | 1157 | |
55955aad | 1158 | struct bus_type acpi_bus_type = { |
9e89dde2 | 1159 | .name = "acpi", |
5d9464a4 PM |
1160 | .match = acpi_bus_match, |
1161 | .probe = acpi_device_probe, | |
1162 | .remove = acpi_device_remove, | |
1163 | .uevent = acpi_device_uevent, | |
9e89dde2 ZR |
1164 | }; |
1165 | ||
d783156e RW |
1166 | static void acpi_device_del(struct acpi_device *device) |
1167 | { | |
1168 | mutex_lock(&acpi_device_lock); | |
1169 | if (device->parent) | |
1170 | list_del(&device->node); | |
1171 | ||
1172 | list_del(&device->wakeup_list); | |
1173 | mutex_unlock(&acpi_device_lock); | |
1174 | ||
1175 | acpi_power_add_remove_device(device, false); | |
1176 | acpi_device_remove_files(device); | |
1177 | if (device->remove) | |
1178 | device->remove(device); | |
1179 | ||
1180 | device_del(&device->dev); | |
1181 | } | |
1182 | ||
1183 | static LIST_HEAD(acpi_device_del_list); | |
1184 | static DEFINE_MUTEX(acpi_device_del_lock); | |
1185 | ||
1186 | static void acpi_device_del_work_fn(struct work_struct *work_not_used) | |
1187 | { | |
1188 | for (;;) { | |
1189 | struct acpi_device *adev; | |
1190 | ||
1191 | mutex_lock(&acpi_device_del_lock); | |
1192 | ||
1193 | if (list_empty(&acpi_device_del_list)) { | |
1194 | mutex_unlock(&acpi_device_del_lock); | |
1195 | break; | |
1196 | } | |
1197 | adev = list_first_entry(&acpi_device_del_list, | |
1198 | struct acpi_device, del_list); | |
1199 | list_del(&adev->del_list); | |
1200 | ||
1201 | mutex_unlock(&acpi_device_del_lock); | |
1202 | ||
1203 | acpi_device_del(adev); | |
1204 | /* | |
1205 | * Drop references to all power resources that might have been | |
1206 | * used by the device. | |
1207 | */ | |
1208 | acpi_power_transition(adev, ACPI_STATE_D3_COLD); | |
1209 | put_device(&adev->dev); | |
1210 | } | |
1211 | } | |
1212 | ||
1213 | /** | |
1214 | * acpi_scan_drop_device - Drop an ACPI device object. | |
1215 | * @handle: Handle of an ACPI namespace node, not used. | |
1216 | * @context: Address of the ACPI device object to drop. | |
1217 | * | |
1218 | * This is invoked by acpi_ns_delete_node() during the removal of the ACPI | |
1219 | * namespace node the device object pointed to by @context is attached to. | |
1220 | * | |
1221 | * The unregistration is carried out asynchronously to avoid running | |
1222 | * acpi_device_del() under the ACPICA's namespace mutex and the list is used to | |
1223 | * ensure the correct ordering (the device objects must be unregistered in the | |
1224 | * same order in which the corresponding namespace nodes are deleted). | |
1225 | */ | |
1226 | static void acpi_scan_drop_device(acpi_handle handle, void *context) | |
caf5c03f | 1227 | { |
d783156e RW |
1228 | static DECLARE_WORK(work, acpi_device_del_work_fn); |
1229 | struct acpi_device *adev = context; | |
1230 | ||
1231 | mutex_lock(&acpi_device_del_lock); | |
1232 | ||
1233 | /* | |
1234 | * Use the ACPI hotplug workqueue which is ordered, so this work item | |
1235 | * won't run after any hotplug work items submitted subsequently. That | |
1236 | * prevents attempts to register device objects identical to those being | |
1237 | * deleted from happening concurrently (such attempts result from | |
1238 | * hotplug events handled via the ACPI hotplug workqueue). It also will | |
1239 | * run after all of the work items submitted previosuly, which helps | |
1240 | * those work items to ensure that they are not accessing stale device | |
1241 | * objects. | |
1242 | */ | |
1243 | if (list_empty(&acpi_device_del_list)) | |
1244 | acpi_queue_hotplug_work(&work); | |
1245 | ||
1246 | list_add_tail(&adev->del_list, &acpi_device_del_list); | |
1247 | /* Make acpi_ns_validate_handle() return NULL for this handle. */ | |
1248 | adev->handle = INVALID_ACPI_HANDLE; | |
1249 | ||
1250 | mutex_unlock(&acpi_device_del_lock); | |
caf5c03f RW |
1251 | } |
1252 | ||
78ea4639 RW |
1253 | static int acpi_get_device_data(acpi_handle handle, struct acpi_device **device, |
1254 | void (*callback)(void *)) | |
caf5c03f RW |
1255 | { |
1256 | acpi_status status; | |
1257 | ||
1258 | if (!device) | |
1259 | return -EINVAL; | |
1260 | ||
78ea4639 RW |
1261 | status = acpi_get_data_full(handle, acpi_scan_drop_device, |
1262 | (void **)device, callback); | |
caf5c03f RW |
1263 | if (ACPI_FAILURE(status) || !*device) { |
1264 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "No context for object [%p]\n", | |
1265 | handle)); | |
1266 | return -ENODEV; | |
1267 | } | |
1268 | return 0; | |
1269 | } | |
78ea4639 RW |
1270 | |
1271 | int acpi_bus_get_device(acpi_handle handle, struct acpi_device **device) | |
1272 | { | |
1273 | return acpi_get_device_data(handle, device, NULL); | |
1274 | } | |
6585925b | 1275 | EXPORT_SYMBOL(acpi_bus_get_device); |
caf5c03f | 1276 | |
78ea4639 RW |
1277 | static void get_acpi_device(void *dev) |
1278 | { | |
1279 | if (dev) | |
1280 | get_device(&((struct acpi_device *)dev)->dev); | |
1281 | } | |
1282 | ||
1283 | struct acpi_device *acpi_bus_get_acpi_device(acpi_handle handle) | |
1284 | { | |
1285 | struct acpi_device *adev = NULL; | |
1286 | ||
1287 | acpi_get_device_data(handle, &adev, get_acpi_device); | |
1288 | return adev; | |
1289 | } | |
1290 | ||
1291 | void acpi_bus_put_acpi_device(struct acpi_device *adev) | |
1292 | { | |
1293 | put_device(&adev->dev); | |
1294 | } | |
1295 | ||
cf860be6 RW |
1296 | int acpi_device_add(struct acpi_device *device, |
1297 | void (*release)(struct device *)) | |
1da177e4 | 1298 | { |
4be44fcd | 1299 | int result; |
e49bd2dd ZR |
1300 | struct acpi_device_bus_id *acpi_device_bus_id, *new_bus_id; |
1301 | int found = 0; | |
66b7ed40 | 1302 | |
d43e167d RW |
1303 | if (device->handle) { |
1304 | acpi_status status; | |
1305 | ||
d783156e | 1306 | status = acpi_attach_data(device->handle, acpi_scan_drop_device, |
d43e167d RW |
1307 | device); |
1308 | if (ACPI_FAILURE(status)) { | |
1309 | acpi_handle_err(device->handle, | |
1310 | "Unable to attach device data\n"); | |
1311 | return -ENODEV; | |
1312 | } | |
1313 | } | |
1314 | ||
9e89dde2 ZR |
1315 | /* |
1316 | * Linkage | |
1317 | * ------- | |
1318 | * Link this device to its parent and siblings. | |
1319 | */ | |
1320 | INIT_LIST_HEAD(&device->children); | |
1321 | INIT_LIST_HEAD(&device->node); | |
9e89dde2 | 1322 | INIT_LIST_HEAD(&device->wakeup_list); |
1033f904 | 1323 | INIT_LIST_HEAD(&device->physical_node_list); |
d783156e | 1324 | INIT_LIST_HEAD(&device->del_list); |
1033f904 | 1325 | mutex_init(&device->physical_node_lock); |
1da177e4 | 1326 | |
e49bd2dd ZR |
1327 | new_bus_id = kzalloc(sizeof(struct acpi_device_bus_id), GFP_KERNEL); |
1328 | if (!new_bus_id) { | |
d43e167d RW |
1329 | pr_err(PREFIX "Memory allocation error\n"); |
1330 | result = -ENOMEM; | |
1331 | goto err_detach; | |
1da177e4 | 1332 | } |
e49bd2dd | 1333 | |
9090589d | 1334 | mutex_lock(&acpi_device_lock); |
e49bd2dd ZR |
1335 | /* |
1336 | * Find suitable bus_id and instance number in acpi_bus_id_list | |
1337 | * If failed, create one and link it into acpi_bus_id_list | |
1338 | */ | |
1339 | list_for_each_entry(acpi_device_bus_id, &acpi_bus_id_list, node) { | |
1131b938 BH |
1340 | if (!strcmp(acpi_device_bus_id->bus_id, |
1341 | acpi_device_hid(device))) { | |
1342 | acpi_device_bus_id->instance_no++; | |
e49bd2dd ZR |
1343 | found = 1; |
1344 | kfree(new_bus_id); | |
1345 | break; | |
1346 | } | |
1da177e4 | 1347 | } |
0c526d96 | 1348 | if (!found) { |
e49bd2dd | 1349 | acpi_device_bus_id = new_bus_id; |
1131b938 | 1350 | strcpy(acpi_device_bus_id->bus_id, acpi_device_hid(device)); |
e49bd2dd ZR |
1351 | acpi_device_bus_id->instance_no = 0; |
1352 | list_add_tail(&acpi_device_bus_id->node, &acpi_bus_id_list); | |
1da177e4 | 1353 | } |
0794469d | 1354 | dev_set_name(&device->dev, "%s:%02x", acpi_device_bus_id->bus_id, acpi_device_bus_id->instance_no); |
1da177e4 | 1355 | |
33b57150 | 1356 | if (device->parent) |
9e89dde2 | 1357 | list_add_tail(&device->node, &device->parent->children); |
33b57150 | 1358 | |
9e89dde2 ZR |
1359 | if (device->wakeup.flags.valid) |
1360 | list_add_tail(&device->wakeup_list, &acpi_wakeup_device_list); | |
9090589d | 1361 | mutex_unlock(&acpi_device_lock); |
1da177e4 | 1362 | |
1890a97a | 1363 | if (device->parent) |
66b7ed40 | 1364 | device->dev.parent = &device->parent->dev; |
1890a97a | 1365 | device->dev.bus = &acpi_bus_type; |
82c7d5ef | 1366 | device->dev.release = release; |
cf860be6 | 1367 | result = device_add(&device->dev); |
0c526d96 | 1368 | if (result) { |
8b12b922 | 1369 | dev_err(&device->dev, "Error registering device\n"); |
d43e167d | 1370 | goto err; |
1da177e4 | 1371 | } |
1da177e4 | 1372 | |
e49bd2dd | 1373 | result = acpi_device_setup_files(device); |
0c526d96 | 1374 | if (result) |
0794469d KS |
1375 | printk(KERN_ERR PREFIX "Error creating sysfs interface for device %s\n", |
1376 | dev_name(&device->dev)); | |
1da177e4 | 1377 | |
1da177e4 | 1378 | return 0; |
d43e167d RW |
1379 | |
1380 | err: | |
9090589d | 1381 | mutex_lock(&acpi_device_lock); |
33b57150 | 1382 | if (device->parent) |
e49bd2dd | 1383 | list_del(&device->node); |
e49bd2dd | 1384 | list_del(&device->wakeup_list); |
9090589d | 1385 | mutex_unlock(&acpi_device_lock); |
d43e167d RW |
1386 | |
1387 | err_detach: | |
d783156e | 1388 | acpi_detach_data(device->handle, acpi_scan_drop_device); |
e49bd2dd | 1389 | return result; |
1da177e4 LT |
1390 | } |
1391 | ||
9e89dde2 ZR |
1392 | /* -------------------------------------------------------------------------- |
1393 | Driver Management | |
1394 | -------------------------------------------------------------------------- */ | |
9e89dde2 ZR |
1395 | /** |
1396 | * acpi_bus_register_driver - register a driver with the ACPI bus | |
1397 | * @driver: driver being registered | |
1398 | * | |
1399 | * Registers a driver with the ACPI bus. Searches the namespace for all | |
1400 | * devices that match the driver's criteria and binds. Returns zero for | |
1401 | * success or a negative error status for failure. | |
1402 | */ | |
1403 | int acpi_bus_register_driver(struct acpi_driver *driver) | |
1da177e4 | 1404 | { |
1890a97a | 1405 | int ret; |
1da177e4 | 1406 | |
9e89dde2 ZR |
1407 | if (acpi_disabled) |
1408 | return -ENODEV; | |
1890a97a PM |
1409 | driver->drv.name = driver->name; |
1410 | driver->drv.bus = &acpi_bus_type; | |
1411 | driver->drv.owner = driver->owner; | |
1da177e4 | 1412 | |
1890a97a PM |
1413 | ret = driver_register(&driver->drv); |
1414 | return ret; | |
9e89dde2 | 1415 | } |
1da177e4 | 1416 | |
9e89dde2 ZR |
1417 | EXPORT_SYMBOL(acpi_bus_register_driver); |
1418 | ||
1419 | /** | |
b27b14ce | 1420 | * acpi_bus_unregister_driver - unregisters a driver with the ACPI bus |
9e89dde2 ZR |
1421 | * @driver: driver to unregister |
1422 | * | |
1423 | * Unregisters a driver with the ACPI bus. Searches the namespace for all | |
1424 | * devices that match the driver's criteria and unbinds. | |
1425 | */ | |
1426 | void acpi_bus_unregister_driver(struct acpi_driver *driver) | |
1427 | { | |
1890a97a | 1428 | driver_unregister(&driver->drv); |
9e89dde2 ZR |
1429 | } |
1430 | ||
1431 | EXPORT_SYMBOL(acpi_bus_unregister_driver); | |
1432 | ||
9e89dde2 ZR |
1433 | /* -------------------------------------------------------------------------- |
1434 | Device Enumeration | |
1435 | -------------------------------------------------------------------------- */ | |
5c478f49 BH |
1436 | static struct acpi_device *acpi_bus_get_parent(acpi_handle handle) |
1437 | { | |
456de893 | 1438 | struct acpi_device *device = NULL; |
5c478f49 | 1439 | acpi_status status; |
5c478f49 BH |
1440 | |
1441 | /* | |
1442 | * Fixed hardware devices do not appear in the namespace and do not | |
1443 | * have handles, but we fabricate acpi_devices for them, so we have | |
1444 | * to deal with them specially. | |
1445 | */ | |
456de893 | 1446 | if (!handle) |
5c478f49 BH |
1447 | return acpi_root; |
1448 | ||
1449 | do { | |
1450 | status = acpi_get_parent(handle, &handle); | |
5c478f49 | 1451 | if (ACPI_FAILURE(status)) |
456de893 RW |
1452 | return status == AE_NULL_ENTRY ? NULL : acpi_root; |
1453 | } while (acpi_bus_get_device(handle, &device)); | |
1454 | return device; | |
5c478f49 BH |
1455 | } |
1456 | ||
9e89dde2 ZR |
1457 | acpi_status |
1458 | acpi_bus_get_ejd(acpi_handle handle, acpi_handle *ejd) | |
1459 | { | |
1460 | acpi_status status; | |
1461 | acpi_handle tmp; | |
1462 | struct acpi_buffer buffer = {ACPI_ALLOCATE_BUFFER, NULL}; | |
1463 | union acpi_object *obj; | |
1464 | ||
1465 | status = acpi_get_handle(handle, "_EJD", &tmp); | |
1466 | if (ACPI_FAILURE(status)) | |
1467 | return status; | |
1468 | ||
1469 | status = acpi_evaluate_object(handle, "_EJD", NULL, &buffer); | |
1470 | if (ACPI_SUCCESS(status)) { | |
1471 | obj = buffer.pointer; | |
3b5fee59 HM |
1472 | status = acpi_get_handle(ACPI_ROOT_OBJECT, obj->string.pointer, |
1473 | ejd); | |
9e89dde2 ZR |
1474 | kfree(buffer.pointer); |
1475 | } | |
1476 | return status; | |
1477 | } | |
1478 | EXPORT_SYMBOL_GPL(acpi_bus_get_ejd); | |
1479 | ||
e88c9c60 RW |
1480 | static int acpi_bus_extract_wakeup_device_power_package(acpi_handle handle, |
1481 | struct acpi_device_wakeup *wakeup) | |
9e89dde2 | 1482 | { |
b581a7f9 RW |
1483 | struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; |
1484 | union acpi_object *package = NULL; | |
9e89dde2 | 1485 | union acpi_object *element = NULL; |
b581a7f9 | 1486 | acpi_status status; |
e88c9c60 | 1487 | int err = -ENODATA; |
9e89dde2 | 1488 | |
b581a7f9 | 1489 | if (!wakeup) |
e88c9c60 | 1490 | return -EINVAL; |
9e89dde2 | 1491 | |
993cbe59 | 1492 | INIT_LIST_HEAD(&wakeup->resources); |
9e89dde2 | 1493 | |
b581a7f9 RW |
1494 | /* _PRW */ |
1495 | status = acpi_evaluate_object(handle, "_PRW", NULL, &buffer); | |
1496 | if (ACPI_FAILURE(status)) { | |
1497 | ACPI_EXCEPTION((AE_INFO, status, "Evaluating _PRW")); | |
e88c9c60 | 1498 | return err; |
b581a7f9 RW |
1499 | } |
1500 | ||
1501 | package = (union acpi_object *)buffer.pointer; | |
1502 | ||
e88c9c60 | 1503 | if (!package || package->package.count < 2) |
b581a7f9 | 1504 | goto out; |
b581a7f9 | 1505 | |
9e89dde2 | 1506 | element = &(package->package.elements[0]); |
e88c9c60 | 1507 | if (!element) |
b581a7f9 | 1508 | goto out; |
e88c9c60 | 1509 | |
9e89dde2 ZR |
1510 | if (element->type == ACPI_TYPE_PACKAGE) { |
1511 | if ((element->package.count < 2) || | |
1512 | (element->package.elements[0].type != | |
1513 | ACPI_TYPE_LOCAL_REFERENCE) | |
e88c9c60 | 1514 | || (element->package.elements[1].type != ACPI_TYPE_INTEGER)) |
b581a7f9 | 1515 | goto out; |
e88c9c60 | 1516 | |
b581a7f9 | 1517 | wakeup->gpe_device = |
9e89dde2 | 1518 | element->package.elements[0].reference.handle; |
b581a7f9 | 1519 | wakeup->gpe_number = |
9e89dde2 ZR |
1520 | (u32) element->package.elements[1].integer.value; |
1521 | } else if (element->type == ACPI_TYPE_INTEGER) { | |
b581a7f9 RW |
1522 | wakeup->gpe_device = NULL; |
1523 | wakeup->gpe_number = element->integer.value; | |
1524 | } else { | |
b581a7f9 RW |
1525 | goto out; |
1526 | } | |
9e89dde2 ZR |
1527 | |
1528 | element = &(package->package.elements[1]); | |
e88c9c60 | 1529 | if (element->type != ACPI_TYPE_INTEGER) |
b581a7f9 | 1530 | goto out; |
e88c9c60 | 1531 | |
b581a7f9 | 1532 | wakeup->sleep_state = element->integer.value; |
9e89dde2 | 1533 | |
e88c9c60 RW |
1534 | err = acpi_extract_power_resources(package, 2, &wakeup->resources); |
1535 | if (err) | |
b581a7f9 | 1536 | goto out; |
9e89dde2 | 1537 | |
0596a52b RW |
1538 | if (!list_empty(&wakeup->resources)) { |
1539 | int sleep_state; | |
9e89dde2 | 1540 | |
b5d667eb RW |
1541 | err = acpi_power_wakeup_list_init(&wakeup->resources, |
1542 | &sleep_state); | |
1543 | if (err) { | |
1544 | acpi_handle_warn(handle, "Retrieving current states " | |
1545 | "of wakeup power resources failed\n"); | |
1546 | acpi_power_resources_list_free(&wakeup->resources); | |
1547 | goto out; | |
1548 | } | |
0596a52b RW |
1549 | if (sleep_state < wakeup->sleep_state) { |
1550 | acpi_handle_warn(handle, "Overriding _PRW sleep state " | |
1551 | "(S%d) by S%d from power resources\n", | |
1552 | (int)wakeup->sleep_state, sleep_state); | |
1553 | wakeup->sleep_state = sleep_state; | |
1554 | } | |
1555 | } | |
9874647b | 1556 | |
b581a7f9 RW |
1557 | out: |
1558 | kfree(buffer.pointer); | |
e88c9c60 | 1559 | return err; |
1da177e4 LT |
1560 | } |
1561 | ||
bd9b2f9a | 1562 | static void acpi_wakeup_gpe_init(struct acpi_device *device) |
1da177e4 | 1563 | { |
29b71a1c | 1564 | struct acpi_device_id button_device_ids[] = { |
29b71a1c | 1565 | {"PNP0C0C", 0}, |
b7e38304 | 1566 | {"PNP0C0D", 0}, |
29b71a1c TR |
1567 | {"PNP0C0E", 0}, |
1568 | {"", 0}, | |
1569 | }; | |
bd9b2f9a | 1570 | struct acpi_device_wakeup *wakeup = &device->wakeup; |
f517709d RW |
1571 | acpi_status status; |
1572 | acpi_event_status event_status; | |
1573 | ||
bd9b2f9a | 1574 | wakeup->flags.notifier_present = 0; |
f517709d RW |
1575 | |
1576 | /* Power button, Lid switch always enable wakeup */ | |
1577 | if (!acpi_match_device_ids(device, button_device_ids)) { | |
bd9b2f9a | 1578 | wakeup->flags.run_wake = 1; |
b7e38304 ZR |
1579 | if (!acpi_match_device_ids(device, &button_device_ids[1])) { |
1580 | /* Do not use Lid/sleep button for S5 wakeup */ | |
bd9b2f9a RW |
1581 | if (wakeup->sleep_state == ACPI_STATE_S5) |
1582 | wakeup->sleep_state = ACPI_STATE_S4; | |
b7e38304 | 1583 | } |
bd9b2f9a | 1584 | acpi_mark_gpe_for_wake(wakeup->gpe_device, wakeup->gpe_number); |
f2b56bc8 | 1585 | device_set_wakeup_capable(&device->dev, true); |
f517709d RW |
1586 | return; |
1587 | } | |
1588 | ||
bd9b2f9a RW |
1589 | acpi_setup_gpe_for_wake(device->handle, wakeup->gpe_device, |
1590 | wakeup->gpe_number); | |
1591 | status = acpi_get_gpe_status(wakeup->gpe_device, wakeup->gpe_number, | |
1592 | &event_status); | |
1593 | if (ACPI_FAILURE(status)) | |
1594 | return; | |
1595 | ||
2f857234 | 1596 | wakeup->flags.run_wake = !!(event_status & ACPI_EVENT_FLAG_HAS_HANDLER); |
f517709d RW |
1597 | } |
1598 | ||
d57d09a4 | 1599 | static void acpi_bus_get_wakeup_device_flags(struct acpi_device *device) |
f517709d | 1600 | { |
e88c9c60 | 1601 | int err; |
29b71a1c | 1602 | |
d57d09a4 | 1603 | /* Presence of _PRW indicates wake capable */ |
952c63e9 | 1604 | if (!acpi_has_method(device->handle, "_PRW")) |
d57d09a4 RW |
1605 | return; |
1606 | ||
e88c9c60 RW |
1607 | err = acpi_bus_extract_wakeup_device_power_package(device->handle, |
1608 | &device->wakeup); | |
1609 | if (err) { | |
1610 | dev_err(&device->dev, "_PRW evaluation error: %d\n", err); | |
d57d09a4 | 1611 | return; |
9e89dde2 | 1612 | } |
1da177e4 | 1613 | |
9e89dde2 | 1614 | device->wakeup.flags.valid = 1; |
9b83ccd2 | 1615 | device->wakeup.prepare_count = 0; |
bd9b2f9a | 1616 | acpi_wakeup_gpe_init(device); |
729b2bdb ZY |
1617 | /* Call _PSW/_DSW object to disable its ability to wake the sleeping |
1618 | * system for the ACPI device with the _PRW object. | |
1619 | * The _PSW object is depreciated in ACPI 3.0 and is replaced by _DSW. | |
1620 | * So it is necessary to call _DSW object first. Only when it is not | |
1621 | * present will the _PSW object used. | |
1622 | */ | |
e88c9c60 RW |
1623 | err = acpi_device_sleep_wake(device, 0, 0, 0); |
1624 | if (err) | |
77e76609 RW |
1625 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
1626 | "error in _DSW or _PSW evaluation\n")); | |
1da177e4 | 1627 | } |
1da177e4 | 1628 | |
f33ce568 RW |
1629 | static void acpi_bus_init_power_state(struct acpi_device *device, int state) |
1630 | { | |
1631 | struct acpi_device_power_state *ps = &device->power.states[state]; | |
ef85bdbe RW |
1632 | char pathname[5] = { '_', 'P', 'R', '0' + state, '\0' }; |
1633 | struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; | |
f33ce568 | 1634 | acpi_status status; |
bf325f95 | 1635 | |
f33ce568 RW |
1636 | INIT_LIST_HEAD(&ps->resources); |
1637 | ||
ef85bdbe RW |
1638 | /* Evaluate "_PRx" to get referenced power resources */ |
1639 | status = acpi_evaluate_object(device->handle, pathname, NULL, &buffer); | |
1640 | if (ACPI_SUCCESS(status)) { | |
1641 | union acpi_object *package = buffer.pointer; | |
1642 | ||
1643 | if (buffer.length && package | |
1644 | && package->type == ACPI_TYPE_PACKAGE | |
1645 | && package->package.count) { | |
e88c9c60 RW |
1646 | int err = acpi_extract_power_resources(package, 0, |
1647 | &ps->resources); | |
1648 | if (!err) | |
ef85bdbe | 1649 | device->power.flags.power_resources = 1; |
f33ce568 | 1650 | } |
ef85bdbe | 1651 | ACPI_FREE(buffer.pointer); |
f33ce568 RW |
1652 | } |
1653 | ||
1654 | /* Evaluate "_PSx" to see if we can do explicit sets */ | |
ef85bdbe | 1655 | pathname[2] = 'S'; |
952c63e9 | 1656 | if (acpi_has_method(device->handle, pathname)) |
f33ce568 RW |
1657 | ps->flags.explicit_set = 1; |
1658 | ||
1659 | /* | |
1660 | * State is valid if there are means to put the device into it. | |
1661 | * D3hot is only valid if _PR3 present. | |
1662 | */ | |
ef85bdbe | 1663 | if (!list_empty(&ps->resources) |
f33ce568 RW |
1664 | || (ps->flags.explicit_set && state < ACPI_STATE_D3_HOT)) { |
1665 | ps->flags.valid = 1; | |
1666 | ps->flags.os_accessible = 1; | |
1667 | } | |
1668 | ||
1669 | ps->power = -1; /* Unknown - driver assigned */ | |
1670 | ps->latency = -1; /* Unknown - driver assigned */ | |
1671 | } | |
1672 | ||
d43e167d | 1673 | static void acpi_bus_get_power_flags(struct acpi_device *device) |
1da177e4 | 1674 | { |
8bc5053b | 1675 | u32 i; |
1a365616 | 1676 | |
d43e167d | 1677 | /* Presence of _PS0|_PR0 indicates 'power manageable' */ |
952c63e9 JL |
1678 | if (!acpi_has_method(device->handle, "_PS0") && |
1679 | !acpi_has_method(device->handle, "_PR0")) | |
1680 | return; | |
1a365616 | 1681 | |
d43e167d | 1682 | device->flags.power_manageable = 1; |
4be44fcd | 1683 | |
9e89dde2 ZR |
1684 | /* |
1685 | * Power Management Flags | |
1686 | */ | |
952c63e9 | 1687 | if (acpi_has_method(device->handle, "_PSC")) |
9e89dde2 | 1688 | device->power.flags.explicit_get = 1; |
f25c0ae2 | 1689 | |
952c63e9 | 1690 | if (acpi_has_method(device->handle, "_IRC")) |
9e89dde2 | 1691 | device->power.flags.inrush_current = 1; |
1da177e4 | 1692 | |
f25c0ae2 RW |
1693 | if (acpi_has_method(device->handle, "_DSW")) |
1694 | device->power.flags.dsw_present = 1; | |
1695 | ||
9e89dde2 ZR |
1696 | /* |
1697 | * Enumerate supported power management states | |
1698 | */ | |
f33ce568 RW |
1699 | for (i = ACPI_STATE_D0; i <= ACPI_STATE_D3_HOT; i++) |
1700 | acpi_bus_init_power_state(device, i); | |
bf325f95 | 1701 | |
0b224527 | 1702 | INIT_LIST_HEAD(&device->power.states[ACPI_STATE_D3_COLD].resources); |
1da177e4 | 1703 | |
9e89dde2 ZR |
1704 | /* Set defaults for D0 and D3 states (always valid) */ |
1705 | device->power.states[ACPI_STATE_D0].flags.valid = 1; | |
1706 | device->power.states[ACPI_STATE_D0].power = 100; | |
8ad928d5 RW |
1707 | device->power.states[ACPI_STATE_D3_COLD].flags.valid = 1; |
1708 | device->power.states[ACPI_STATE_D3_COLD].power = 0; | |
c8f7a62c | 1709 | |
5c7dd710 RW |
1710 | /* Set D3cold's explicit_set flag if _PS3 exists. */ |
1711 | if (device->power.states[ACPI_STATE_D3_HOT].flags.explicit_set) | |
1712 | device->power.states[ACPI_STATE_D3_COLD].flags.explicit_set = 1; | |
1713 | ||
1399dfcd AL |
1714 | /* Presence of _PS3 or _PRx means we can put the device into D3 cold */ |
1715 | if (device->power.states[ACPI_STATE_D3_HOT].flags.explicit_set || | |
1716 | device->power.flags.power_resources) | |
1717 | device->power.states[ACPI_STATE_D3_COLD].flags.os_accessible = 1; | |
1718 | ||
b3785492 RW |
1719 | if (acpi_bus_init_power(device)) { |
1720 | acpi_free_power_resources_lists(device); | |
1721 | device->flags.power_manageable = 0; | |
1722 | } | |
9e89dde2 | 1723 | } |
c8f7a62c | 1724 | |
d43e167d | 1725 | static void acpi_bus_get_flags(struct acpi_device *device) |
1da177e4 | 1726 | { |
1da177e4 | 1727 | /* Presence of _STA indicates 'dynamic_status' */ |
952c63e9 | 1728 | if (acpi_has_method(device->handle, "_STA")) |
1da177e4 LT |
1729 | device->flags.dynamic_status = 1; |
1730 | ||
1da177e4 | 1731 | /* Presence of _RMV indicates 'removable' */ |
952c63e9 | 1732 | if (acpi_has_method(device->handle, "_RMV")) |
1da177e4 LT |
1733 | device->flags.removable = 1; |
1734 | ||
1735 | /* Presence of _EJD|_EJ0 indicates 'ejectable' */ | |
952c63e9 JL |
1736 | if (acpi_has_method(device->handle, "_EJD") || |
1737 | acpi_has_method(device->handle, "_EJ0")) | |
1da177e4 | 1738 | device->flags.ejectable = 1; |
1da177e4 LT |
1739 | } |
1740 | ||
c7bcb4e9 | 1741 | static void acpi_device_get_busid(struct acpi_device *device) |
1da177e4 | 1742 | { |
4be44fcd LB |
1743 | char bus_id[5] = { '?', 0 }; |
1744 | struct acpi_buffer buffer = { sizeof(bus_id), bus_id }; | |
1745 | int i = 0; | |
1da177e4 LT |
1746 | |
1747 | /* | |
1748 | * Bus ID | |
1749 | * ------ | |
1750 | * The device's Bus ID is simply the object name. | |
1751 | * TBD: Shouldn't this value be unique (within the ACPI namespace)? | |
1752 | */ | |
859ac9a4 | 1753 | if (ACPI_IS_ROOT_DEVICE(device)) { |
1da177e4 | 1754 | strcpy(device->pnp.bus_id, "ACPI"); |
859ac9a4 BH |
1755 | return; |
1756 | } | |
1757 | ||
1758 | switch (device->device_type) { | |
1da177e4 LT |
1759 | case ACPI_BUS_TYPE_POWER_BUTTON: |
1760 | strcpy(device->pnp.bus_id, "PWRF"); | |
1761 | break; | |
1762 | case ACPI_BUS_TYPE_SLEEP_BUTTON: | |
1763 | strcpy(device->pnp.bus_id, "SLPF"); | |
1764 | break; | |
1765 | default: | |
66b7ed40 | 1766 | acpi_get_name(device->handle, ACPI_SINGLE_NAME, &buffer); |
1da177e4 LT |
1767 | /* Clean up trailing underscores (if any) */ |
1768 | for (i = 3; i > 1; i--) { | |
1769 | if (bus_id[i] == '_') | |
1770 | bus_id[i] = '\0'; | |
1771 | else | |
1772 | break; | |
1773 | } | |
1774 | strcpy(device->pnp.bus_id, bus_id); | |
1775 | break; | |
1776 | } | |
1777 | } | |
1778 | ||
ebf4df8d JL |
1779 | /* |
1780 | * acpi_ata_match - see if an acpi object is an ATA device | |
1781 | * | |
1782 | * If an acpi object has one of the ACPI ATA methods defined, | |
1783 | * then we can safely call it an ATA device. | |
1784 | */ | |
1785 | bool acpi_ata_match(acpi_handle handle) | |
1786 | { | |
1787 | return acpi_has_method(handle, "_GTF") || | |
1788 | acpi_has_method(handle, "_GTM") || | |
1789 | acpi_has_method(handle, "_STM") || | |
1790 | acpi_has_method(handle, "_SDD"); | |
1791 | } | |
1792 | ||
54735266 | 1793 | /* |
d4e1a692 | 1794 | * acpi_bay_match - see if an acpi object is an ejectable driver bay |
54735266 ZR |
1795 | * |
1796 | * If an acpi object is ejectable and has one of the ACPI ATA methods defined, | |
1797 | * then we can safely call it an ejectable drive bay | |
1798 | */ | |
ebf4df8d | 1799 | bool acpi_bay_match(acpi_handle handle) |
d4e1a692 | 1800 | { |
54735266 ZR |
1801 | acpi_handle phandle; |
1802 | ||
952c63e9 | 1803 | if (!acpi_has_method(handle, "_EJ0")) |
ebf4df8d JL |
1804 | return false; |
1805 | if (acpi_ata_match(handle)) | |
1806 | return true; | |
1807 | if (ACPI_FAILURE(acpi_get_parent(handle, &phandle))) | |
1808 | return false; | |
54735266 | 1809 | |
ebf4df8d | 1810 | return acpi_ata_match(phandle); |
54735266 ZR |
1811 | } |
1812 | ||
b43109fa | 1813 | bool acpi_device_is_battery(struct acpi_device *adev) |
1e2380cd | 1814 | { |
b43109fa | 1815 | struct acpi_hardware_id *hwid; |
1e2380cd | 1816 | |
b43109fa RW |
1817 | list_for_each_entry(hwid, &adev->pnp.ids, list) |
1818 | if (!strcmp("PNP0C0A", hwid->id)) | |
1819 | return true; | |
1e2380cd | 1820 | |
b43109fa | 1821 | return false; |
1e2380cd RW |
1822 | } |
1823 | ||
b43109fa | 1824 | static bool is_ejectable_bay(struct acpi_device *adev) |
1e2380cd | 1825 | { |
b43109fa RW |
1826 | acpi_handle handle = adev->handle; |
1827 | ||
1828 | if (acpi_has_method(handle, "_EJ0") && acpi_device_is_battery(adev)) | |
1e2380cd RW |
1829 | return true; |
1830 | ||
1831 | return acpi_bay_match(handle); | |
1832 | } | |
1833 | ||
3620f2f2 | 1834 | /* |
d4e1a692 | 1835 | * acpi_dock_match - see if an acpi object has a _DCK method |
3620f2f2 | 1836 | */ |
ebf4df8d | 1837 | bool acpi_dock_match(acpi_handle handle) |
3620f2f2 | 1838 | { |
ebf4df8d | 1839 | return acpi_has_method(handle, "_DCK"); |
3620f2f2 FS |
1840 | } |
1841 | ||
620e112c | 1842 | const char *acpi_device_hid(struct acpi_device *device) |
15b8dd53 | 1843 | { |
7f47fa6c | 1844 | struct acpi_hardware_id *hid; |
15b8dd53 | 1845 | |
2b2ae7c7 TR |
1846 | if (list_empty(&device->pnp.ids)) |
1847 | return dummy_hid; | |
1848 | ||
7f47fa6c BH |
1849 | hid = list_first_entry(&device->pnp.ids, struct acpi_hardware_id, list); |
1850 | return hid->id; | |
1851 | } | |
1852 | EXPORT_SYMBOL(acpi_device_hid); | |
15b8dd53 | 1853 | |
d4e1a692 | 1854 | static void acpi_add_id(struct acpi_device_pnp *pnp, const char *dev_id) |
7f47fa6c BH |
1855 | { |
1856 | struct acpi_hardware_id *id; | |
15b8dd53 | 1857 | |
7f47fa6c BH |
1858 | id = kmalloc(sizeof(*id), GFP_KERNEL); |
1859 | if (!id) | |
1860 | return; | |
15b8dd53 | 1861 | |
581de59e | 1862 | id->id = kstrdup(dev_id, GFP_KERNEL); |
7f47fa6c BH |
1863 | if (!id->id) { |
1864 | kfree(id); | |
1865 | return; | |
15b8dd53 BM |
1866 | } |
1867 | ||
d4e1a692 TK |
1868 | list_add_tail(&id->list, &pnp->ids); |
1869 | pnp->type.hardware_id = 1; | |
15b8dd53 BM |
1870 | } |
1871 | ||
222e82ac DW |
1872 | /* |
1873 | * Old IBM workstations have a DSDT bug wherein the SMBus object | |
1874 | * lacks the SMBUS01 HID and the methods do not have the necessary "_" | |
1875 | * prefix. Work around this. | |
1876 | */ | |
ebf4df8d | 1877 | static bool acpi_ibm_smbus_match(acpi_handle handle) |
222e82ac | 1878 | { |
ebf4df8d JL |
1879 | char node_name[ACPI_PATH_SEGMENT_LENGTH]; |
1880 | struct acpi_buffer path = { sizeof(node_name), node_name }; | |
222e82ac DW |
1881 | |
1882 | if (!dmi_name_in_vendors("IBM")) | |
ebf4df8d | 1883 | return false; |
222e82ac DW |
1884 | |
1885 | /* Look for SMBS object */ | |
ebf4df8d JL |
1886 | if (ACPI_FAILURE(acpi_get_name(handle, ACPI_SINGLE_NAME, &path)) || |
1887 | strcmp("SMBS", path.pointer)) | |
1888 | return false; | |
222e82ac DW |
1889 | |
1890 | /* Does it have the necessary (but misnamed) methods? */ | |
952c63e9 JL |
1891 | if (acpi_has_method(handle, "SBI") && |
1892 | acpi_has_method(handle, "SBR") && | |
1893 | acpi_has_method(handle, "SBW")) | |
ebf4df8d JL |
1894 | return true; |
1895 | ||
1896 | return false; | |
222e82ac DW |
1897 | } |
1898 | ||
ae3caa80 JL |
1899 | static bool acpi_object_is_system_bus(acpi_handle handle) |
1900 | { | |
1901 | acpi_handle tmp; | |
1902 | ||
1903 | if (ACPI_SUCCESS(acpi_get_handle(NULL, "\\_SB", &tmp)) && | |
1904 | tmp == handle) | |
1905 | return true; | |
1906 | if (ACPI_SUCCESS(acpi_get_handle(NULL, "\\_TZ", &tmp)) && | |
1907 | tmp == handle) | |
1908 | return true; | |
1909 | ||
1910 | return false; | |
1911 | } | |
1912 | ||
c0af4175 TK |
1913 | static void acpi_set_pnp_ids(acpi_handle handle, struct acpi_device_pnp *pnp, |
1914 | int device_type) | |
1da177e4 | 1915 | { |
4be44fcd | 1916 | acpi_status status; |
57f3674f | 1917 | struct acpi_device_info *info; |
78e25fef | 1918 | struct acpi_pnp_device_id_list *cid_list; |
7f47fa6c | 1919 | int i; |
1da177e4 | 1920 | |
c0af4175 | 1921 | switch (device_type) { |
1da177e4 | 1922 | case ACPI_BUS_TYPE_DEVICE: |
c0af4175 TK |
1923 | if (handle == ACPI_ROOT_OBJECT) { |
1924 | acpi_add_id(pnp, ACPI_SYSTEM_HID); | |
859ac9a4 BH |
1925 | break; |
1926 | } | |
1927 | ||
c0af4175 | 1928 | status = acpi_get_object_info(handle, &info); |
1da177e4 | 1929 | if (ACPI_FAILURE(status)) { |
c0af4175 TK |
1930 | pr_err(PREFIX "%s: Error reading device info\n", |
1931 | __func__); | |
1da177e4 LT |
1932 | return; |
1933 | } | |
1934 | ||
549e6845 | 1935 | if (info->valid & ACPI_VALID_HID) { |
c0af4175 | 1936 | acpi_add_id(pnp, info->hardware_id.string); |
549e6845 RW |
1937 | pnp->type.platform_id = 1; |
1938 | } | |
57f3674f | 1939 | if (info->valid & ACPI_VALID_CID) { |
15b8dd53 | 1940 | cid_list = &info->compatible_id_list; |
57f3674f | 1941 | for (i = 0; i < cid_list->count; i++) |
c0af4175 | 1942 | acpi_add_id(pnp, cid_list->ids[i].string); |
57f3674f | 1943 | } |
1da177e4 | 1944 | if (info->valid & ACPI_VALID_ADR) { |
c0af4175 TK |
1945 | pnp->bus_address = info->address; |
1946 | pnp->type.bus_address = 1; | |
1da177e4 | 1947 | } |
ccf78040 | 1948 | if (info->valid & ACPI_VALID_UID) |
c0af4175 | 1949 | pnp->unique_id = kstrdup(info->unique_id.string, |
ccf78040 | 1950 | GFP_KERNEL); |
ae843332 | 1951 | |
a83893ae BH |
1952 | kfree(info); |
1953 | ||
57f3674f BH |
1954 | /* |
1955 | * Some devices don't reliably have _HIDs & _CIDs, so add | |
1956 | * synthetic HIDs to make sure drivers can find them. | |
1957 | */ | |
c0af4175 TK |
1958 | if (acpi_is_video_device(handle)) |
1959 | acpi_add_id(pnp, ACPI_VIDEO_HID); | |
ebf4df8d | 1960 | else if (acpi_bay_match(handle)) |
c0af4175 | 1961 | acpi_add_id(pnp, ACPI_BAY_HID); |
ebf4df8d | 1962 | else if (acpi_dock_match(handle)) |
c0af4175 | 1963 | acpi_add_id(pnp, ACPI_DOCK_HID); |
ebf4df8d | 1964 | else if (acpi_ibm_smbus_match(handle)) |
c0af4175 | 1965 | acpi_add_id(pnp, ACPI_SMBUS_IBM_HID); |
ae3caa80 JL |
1966 | else if (list_empty(&pnp->ids) && |
1967 | acpi_object_is_system_bus(handle)) { | |
1968 | /* \_SB, \_TZ, LNXSYBUS */ | |
1969 | acpi_add_id(pnp, ACPI_BUS_HID); | |
c0af4175 TK |
1970 | strcpy(pnp->device_name, ACPI_BUS_DEVICE_NAME); |
1971 | strcpy(pnp->device_class, ACPI_BUS_CLASS); | |
b7b30de5 | 1972 | } |
54735266 | 1973 | |
1da177e4 LT |
1974 | break; |
1975 | case ACPI_BUS_TYPE_POWER: | |
c0af4175 | 1976 | acpi_add_id(pnp, ACPI_POWER_HID); |
1da177e4 LT |
1977 | break; |
1978 | case ACPI_BUS_TYPE_PROCESSOR: | |
c0af4175 | 1979 | acpi_add_id(pnp, ACPI_PROCESSOR_OBJECT_HID); |
1da177e4 | 1980 | break; |
1da177e4 | 1981 | case ACPI_BUS_TYPE_THERMAL: |
c0af4175 | 1982 | acpi_add_id(pnp, ACPI_THERMAL_HID); |
1da177e4 LT |
1983 | break; |
1984 | case ACPI_BUS_TYPE_POWER_BUTTON: | |
c0af4175 | 1985 | acpi_add_id(pnp, ACPI_BUTTON_HID_POWERF); |
1da177e4 LT |
1986 | break; |
1987 | case ACPI_BUS_TYPE_SLEEP_BUTTON: | |
c0af4175 | 1988 | acpi_add_id(pnp, ACPI_BUTTON_HID_SLEEPF); |
1da177e4 LT |
1989 | break; |
1990 | } | |
1da177e4 LT |
1991 | } |
1992 | ||
c0af4175 TK |
1993 | void acpi_free_pnp_ids(struct acpi_device_pnp *pnp) |
1994 | { | |
1995 | struct acpi_hardware_id *id, *tmp; | |
1996 | ||
1997 | list_for_each_entry_safe(id, tmp, &pnp->ids, list) { | |
1998 | kfree(id->id); | |
1999 | kfree(id); | |
2000 | } | |
2001 | kfree(pnp->unique_id); | |
2002 | } | |
2003 | ||
82c7d5ef RW |
2004 | void acpi_init_device_object(struct acpi_device *device, acpi_handle handle, |
2005 | int type, unsigned long long sta) | |
1da177e4 | 2006 | { |
d43e167d RW |
2007 | INIT_LIST_HEAD(&device->pnp.ids); |
2008 | device->device_type = type; | |
2009 | device->handle = handle; | |
2010 | device->parent = acpi_bus_get_parent(handle); | |
25db115b | 2011 | acpi_set_device_status(device, sta); |
d43e167d | 2012 | acpi_device_get_busid(device); |
c0af4175 | 2013 | acpi_set_pnp_ids(handle, &device->pnp, type); |
ffdcd955 | 2014 | acpi_init_properties(device); |
d43e167d | 2015 | acpi_bus_get_flags(device); |
2c0d4fe0 | 2016 | device->flags.match_driver = false; |
202317a5 RW |
2017 | device->flags.initialized = true; |
2018 | device->flags.visited = false; | |
cf860be6 RW |
2019 | device_initialize(&device->dev); |
2020 | dev_set_uevent_suppress(&device->dev, true); | |
2021 | } | |
bc3b0772 | 2022 | |
cf860be6 RW |
2023 | void acpi_device_add_finalize(struct acpi_device *device) |
2024 | { | |
2025 | dev_set_uevent_suppress(&device->dev, false); | |
2026 | kobject_uevent(&device->dev.kobj, KOBJ_ADD); | |
1da177e4 LT |
2027 | } |
2028 | ||
5c478f49 BH |
2029 | static int acpi_add_single_object(struct acpi_device **child, |
2030 | acpi_handle handle, int type, | |
2c0d4fe0 | 2031 | unsigned long long sta) |
1da177e4 | 2032 | { |
77c24888 BH |
2033 | int result; |
2034 | struct acpi_device *device; | |
29aaefa6 | 2035 | struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; |
1da177e4 | 2036 | |
36bcbec7 | 2037 | device = kzalloc(sizeof(struct acpi_device), GFP_KERNEL); |
1da177e4 | 2038 | if (!device) { |
6468463a | 2039 | printk(KERN_ERR PREFIX "Memory allocation error\n"); |
d550d98d | 2040 | return -ENOMEM; |
1da177e4 | 2041 | } |
1da177e4 | 2042 | |
d43e167d RW |
2043 | acpi_init_device_object(device, handle, type, sta); |
2044 | acpi_bus_get_power_flags(device); | |
d57d09a4 | 2045 | acpi_bus_get_wakeup_device_flags(device); |
1da177e4 | 2046 | |
cf860be6 | 2047 | result = acpi_device_add(device, acpi_device_release); |
d43e167d | 2048 | if (result) { |
718fb0de | 2049 | acpi_device_release(&device->dev); |
d43e167d RW |
2050 | return result; |
2051 | } | |
1da177e4 | 2052 | |
d43e167d | 2053 | acpi_power_add_remove_device(device, true); |
cf860be6 | 2054 | acpi_device_add_finalize(device); |
d43e167d RW |
2055 | acpi_get_name(handle, ACPI_FULL_PATHNAME, &buffer); |
2056 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Added %s [%s] parent %s\n", | |
2057 | dev_name(&device->dev), (char *) buffer.pointer, | |
2058 | device->parent ? dev_name(&device->parent->dev) : "(null)")); | |
2059 | kfree(buffer.pointer); | |
2060 | *child = device; | |
2061 | return 0; | |
bf325f95 RW |
2062 | } |
2063 | ||
778cbc1d BH |
2064 | static int acpi_bus_type_and_status(acpi_handle handle, int *type, |
2065 | unsigned long long *sta) | |
1da177e4 | 2066 | { |
778cbc1d BH |
2067 | acpi_status status; |
2068 | acpi_object_type acpi_type; | |
1da177e4 | 2069 | |
778cbc1d | 2070 | status = acpi_get_type(handle, &acpi_type); |
51a85faf | 2071 | if (ACPI_FAILURE(status)) |
778cbc1d | 2072 | return -ENODEV; |
4be44fcd | 2073 | |
778cbc1d | 2074 | switch (acpi_type) { |
51a85faf BH |
2075 | case ACPI_TYPE_ANY: /* for ACPI_ROOT_OBJECT */ |
2076 | case ACPI_TYPE_DEVICE: | |
778cbc1d BH |
2077 | *type = ACPI_BUS_TYPE_DEVICE; |
2078 | status = acpi_bus_get_status_handle(handle, sta); | |
2079 | if (ACPI_FAILURE(status)) | |
2080 | return -ENODEV; | |
51a85faf BH |
2081 | break; |
2082 | case ACPI_TYPE_PROCESSOR: | |
778cbc1d BH |
2083 | *type = ACPI_BUS_TYPE_PROCESSOR; |
2084 | status = acpi_bus_get_status_handle(handle, sta); | |
2085 | if (ACPI_FAILURE(status)) | |
2086 | return -ENODEV; | |
51a85faf BH |
2087 | break; |
2088 | case ACPI_TYPE_THERMAL: | |
778cbc1d BH |
2089 | *type = ACPI_BUS_TYPE_THERMAL; |
2090 | *sta = ACPI_STA_DEFAULT; | |
51a85faf BH |
2091 | break; |
2092 | case ACPI_TYPE_POWER: | |
778cbc1d BH |
2093 | *type = ACPI_BUS_TYPE_POWER; |
2094 | *sta = ACPI_STA_DEFAULT; | |
51a85faf BH |
2095 | break; |
2096 | default: | |
778cbc1d | 2097 | return -ENODEV; |
51a85faf | 2098 | } |
1da177e4 | 2099 | |
778cbc1d BH |
2100 | return 0; |
2101 | } | |
2102 | ||
202317a5 RW |
2103 | bool acpi_device_is_present(struct acpi_device *adev) |
2104 | { | |
2105 | if (adev->status.present || adev->status.functional) | |
2106 | return true; | |
2107 | ||
2108 | adev->flags.initialized = false; | |
2109 | return false; | |
2110 | } | |
2111 | ||
4b59cc1f RW |
2112 | static bool acpi_scan_handler_matching(struct acpi_scan_handler *handler, |
2113 | char *idstr, | |
2114 | const struct acpi_device_id **matchid) | |
2115 | { | |
2116 | const struct acpi_device_id *devid; | |
2117 | ||
aca0a4eb RW |
2118 | if (handler->match) |
2119 | return handler->match(idstr, matchid); | |
2120 | ||
4b59cc1f RW |
2121 | for (devid = handler->ids; devid->id[0]; devid++) |
2122 | if (!strcmp((char *)devid->id, idstr)) { | |
2123 | if (matchid) | |
2124 | *matchid = devid; | |
2125 | ||
2126 | return true; | |
2127 | } | |
2128 | ||
2129 | return false; | |
2130 | } | |
2131 | ||
6b772e8f TK |
2132 | static struct acpi_scan_handler *acpi_scan_match_handler(char *idstr, |
2133 | const struct acpi_device_id **matchid) | |
2134 | { | |
2135 | struct acpi_scan_handler *handler; | |
2136 | ||
2137 | list_for_each_entry(handler, &acpi_scan_handlers_list, list_node) | |
2138 | if (acpi_scan_handler_matching(handler, idstr, matchid)) | |
2139 | return handler; | |
2140 | ||
2141 | return NULL; | |
2142 | } | |
2143 | ||
3f8055c3 RW |
2144 | void acpi_scan_hotplug_enabled(struct acpi_hotplug_profile *hotplug, bool val) |
2145 | { | |
3f8055c3 RW |
2146 | if (!!hotplug->enabled == !!val) |
2147 | return; | |
2148 | ||
2149 | mutex_lock(&acpi_scan_lock); | |
2150 | ||
2151 | hotplug->enabled = val; | |
3f8055c3 RW |
2152 | |
2153 | mutex_unlock(&acpi_scan_lock); | |
2154 | } | |
2155 | ||
3c2cc7ff | 2156 | static void acpi_scan_init_hotplug(struct acpi_device *adev) |
a33ec399 | 2157 | { |
6b772e8f | 2158 | struct acpi_hardware_id *hwid; |
a33ec399 | 2159 | |
b43109fa | 2160 | if (acpi_dock_match(adev->handle) || is_ejectable_bay(adev)) { |
1e2380cd RW |
2161 | acpi_dock_add(adev); |
2162 | return; | |
2163 | } | |
3c2cc7ff RW |
2164 | list_for_each_entry(hwid, &adev->pnp.ids, list) { |
2165 | struct acpi_scan_handler *handler; | |
a33ec399 | 2166 | |
6b772e8f | 2167 | handler = acpi_scan_match_handler(hwid->id, NULL); |
1a699476 RW |
2168 | if (handler) { |
2169 | adev->flags.hotplug_notify = true; | |
2170 | break; | |
2171 | } | |
3c2cc7ff | 2172 | } |
a33ec399 RW |
2173 | } |
2174 | ||
e3863094 RW |
2175 | static acpi_status acpi_bus_check_add(acpi_handle handle, u32 lvl_not_used, |
2176 | void *not_used, void **return_value) | |
778cbc1d | 2177 | { |
805d410f | 2178 | struct acpi_device *device = NULL; |
778cbc1d BH |
2179 | int type; |
2180 | unsigned long long sta; | |
2181 | int result; | |
2182 | ||
4002bf38 RW |
2183 | acpi_bus_get_device(handle, &device); |
2184 | if (device) | |
2185 | goto out; | |
2186 | ||
778cbc1d BH |
2187 | result = acpi_bus_type_and_status(handle, &type, &sta); |
2188 | if (result) | |
2189 | return AE_OK; | |
2190 | ||
82c7d5ef RW |
2191 | if (type == ACPI_BUS_TYPE_POWER) { |
2192 | acpi_add_power_resource(handle); | |
2193 | return AE_OK; | |
2194 | } | |
2195 | ||
2c0d4fe0 | 2196 | acpi_add_single_object(&device, handle, type, sta); |
e3b87f8a | 2197 | if (!device) |
51a85faf | 2198 | return AE_CTRL_DEPTH; |
1da177e4 | 2199 | |
3c2cc7ff RW |
2200 | acpi_scan_init_hotplug(device); |
2201 | ||
4002bf38 | 2202 | out: |
51a85faf BH |
2203 | if (!*return_value) |
2204 | *return_value = device; | |
805d410f | 2205 | |
51a85faf BH |
2206 | return AE_OK; |
2207 | } | |
3fb02738 | 2208 | |
48459340 ZR |
2209 | static int acpi_check_spi_i2c_slave(struct acpi_resource *ares, void *data) |
2210 | { | |
2211 | bool *is_spi_i2c_slave_p = data; | |
2212 | ||
2213 | if (ares->type != ACPI_RESOURCE_TYPE_SERIAL_BUS) | |
2214 | return 1; | |
2215 | ||
2216 | /* | |
2217 | * devices that are connected to UART still need to be enumerated to | |
2218 | * platform bus | |
2219 | */ | |
2220 | if (ares->data.common_serial_bus.type != ACPI_RESOURCE_SERIAL_TYPE_UART) | |
2221 | *is_spi_i2c_slave_p = true; | |
2222 | ||
2223 | /* no need to do more checking */ | |
2224 | return -1; | |
2225 | } | |
2226 | ||
2227 | static void acpi_default_enumeration(struct acpi_device *device) | |
2228 | { | |
2229 | struct list_head resource_list; | |
2230 | bool is_spi_i2c_slave = false; | |
2231 | ||
2232 | if (!device->pnp.type.platform_id || device->handler) | |
2233 | return; | |
2234 | ||
2235 | /* | |
2236 | * Do not enemerate SPI/I2C slaves as they will be enuerated by their | |
2237 | * respective parents. | |
2238 | */ | |
2239 | INIT_LIST_HEAD(&resource_list); | |
2240 | acpi_dev_get_resources(device, &resource_list, acpi_check_spi_i2c_slave, | |
2241 | &is_spi_i2c_slave); | |
2242 | acpi_dev_free_resource_list(&resource_list); | |
2243 | if (!is_spi_i2c_slave) | |
2244 | acpi_create_platform_device(device); | |
2245 | } | |
2246 | ||
c5698074 | 2247 | static int acpi_scan_attach_handler(struct acpi_device *device) |
ca589f94 | 2248 | { |
c5698074 RW |
2249 | struct acpi_hardware_id *hwid; |
2250 | int ret = 0; | |
ca589f94 | 2251 | |
c5698074 | 2252 | list_for_each_entry(hwid, &device->pnp.ids, list) { |
87b85b3c | 2253 | const struct acpi_device_id *devid; |
c5698074 | 2254 | struct acpi_scan_handler *handler; |
ca589f94 | 2255 | |
c5698074 RW |
2256 | handler = acpi_scan_match_handler(hwid->id, &devid); |
2257 | if (handler) { | |
d34afa9d RW |
2258 | if (!handler->attach) { |
2259 | device->pnp.type.platform_id = 0; | |
2260 | continue; | |
2261 | } | |
9cb32acf | 2262 | device->handler = handler; |
87b85b3c | 2263 | ret = handler->attach(device, devid); |
9cb32acf | 2264 | if (ret > 0) |
c5698074 | 2265 | break; |
9cb32acf RW |
2266 | |
2267 | device->handler = NULL; | |
2268 | if (ret < 0) | |
c5698074 | 2269 | break; |
ca589f94 RW |
2270 | } |
2271 | } | |
48459340 ZR |
2272 | if (!ret) |
2273 | acpi_default_enumeration(device); | |
2274 | ||
ca589f94 RW |
2275 | return ret; |
2276 | } | |
2277 | ||
2c22e652 | 2278 | static void acpi_bus_attach(struct acpi_device *device) |
51a85faf | 2279 | { |
2c22e652 | 2280 | struct acpi_device *child; |
1e2380cd | 2281 | acpi_handle ejd; |
ca589f94 | 2282 | int ret; |
3fb02738 | 2283 | |
1e2380cd RW |
2284 | if (ACPI_SUCCESS(acpi_bus_get_ejd(device->handle, &ejd))) |
2285 | register_dock_dependent_device(device, ejd); | |
2286 | ||
2c22e652 | 2287 | acpi_bus_get_status(device); |
202317a5 | 2288 | /* Skip devices that are not present. */ |
2c22e652 RW |
2289 | if (!acpi_device_is_present(device)) { |
2290 | device->flags.visited = false; | |
2291 | return; | |
2292 | } | |
3a391a39 | 2293 | if (device->handler) |
2c22e652 | 2294 | goto ok; |
3a391a39 | 2295 | |
202317a5 RW |
2296 | if (!device->flags.initialized) { |
2297 | acpi_bus_update_power(device, NULL); | |
2298 | device->flags.initialized = true; | |
2299 | } | |
2c22e652 | 2300 | device->flags.visited = false; |
ca589f94 | 2301 | ret = acpi_scan_attach_handler(device); |
6931007c | 2302 | if (ret < 0) |
2c22e652 | 2303 | return; |
6931007c RW |
2304 | |
2305 | device->flags.match_driver = true; | |
2c22e652 RW |
2306 | if (!ret) { |
2307 | ret = device_attach(&device->dev); | |
2308 | if (ret < 0) | |
2309 | return; | |
2310 | } | |
202317a5 | 2311 | device->flags.visited = true; |
202317a5 | 2312 | |
2c22e652 RW |
2313 | ok: |
2314 | list_for_each_entry(child, &device->children, node) | |
2315 | acpi_bus_attach(child); | |
8ab17fc9 RW |
2316 | |
2317 | if (device->handler && device->handler->hotplug.notify_online) | |
2318 | device->handler->hotplug.notify_online(device); | |
1da177e4 | 2319 | } |
1da177e4 | 2320 | |
636458de | 2321 | /** |
b8bd759a | 2322 | * acpi_bus_scan - Add ACPI device node objects in a given namespace scope. |
636458de | 2323 | * @handle: Root of the namespace scope to scan. |
7779688f | 2324 | * |
636458de RW |
2325 | * Scan a given ACPI tree (probably recently hot-plugged) and create and add |
2326 | * found devices. | |
7779688f | 2327 | * |
636458de RW |
2328 | * If no devices were found, -ENODEV is returned, but it does not mean that |
2329 | * there has been a real error. There just have been no suitable ACPI objects | |
2330 | * in the table trunk from which the kernel could create a device and add an | |
2331 | * appropriate driver. | |
3757b948 RW |
2332 | * |
2333 | * Must be called under acpi_scan_lock. | |
7779688f | 2334 | */ |
b8bd759a | 2335 | int acpi_bus_scan(acpi_handle handle) |
3fb02738 | 2336 | { |
b8bd759a | 2337 | void *device = NULL; |
3fb02738 | 2338 | |
b8bd759a RW |
2339 | if (ACPI_SUCCESS(acpi_bus_check_add(handle, 0, NULL, &device))) |
2340 | acpi_walk_namespace(ACPI_TYPE_ANY, handle, ACPI_UINT32_MAX, | |
2341 | acpi_bus_check_add, NULL, NULL, &device); | |
3fb02738 | 2342 | |
2c22e652 RW |
2343 | if (device) { |
2344 | acpi_bus_attach(device); | |
2345 | return 0; | |
05404d8f | 2346 | } |
2c22e652 | 2347 | return -ENODEV; |
3fb02738 | 2348 | } |
2c22e652 | 2349 | EXPORT_SYMBOL(acpi_bus_scan); |
1da177e4 | 2350 | |
3757b948 | 2351 | /** |
2c22e652 RW |
2352 | * acpi_bus_trim - Detach scan handlers and drivers from ACPI device objects. |
2353 | * @adev: Root of the ACPI namespace scope to walk. | |
3757b948 RW |
2354 | * |
2355 | * Must be called under acpi_scan_lock. | |
2356 | */ | |
2c22e652 | 2357 | void acpi_bus_trim(struct acpi_device *adev) |
1da177e4 | 2358 | { |
2c22e652 RW |
2359 | struct acpi_scan_handler *handler = adev->handler; |
2360 | struct acpi_device *child; | |
2361 | ||
2362 | list_for_each_entry_reverse(child, &adev->children, node) | |
2363 | acpi_bus_trim(child); | |
2364 | ||
a951c773 | 2365 | adev->flags.match_driver = false; |
2c22e652 RW |
2366 | if (handler) { |
2367 | if (handler->detach) | |
2368 | handler->detach(adev); | |
2369 | ||
2370 | adev->handler = NULL; | |
2371 | } else { | |
2372 | device_release_driver(&adev->dev); | |
2373 | } | |
05404d8f | 2374 | /* |
2c22e652 RW |
2375 | * Most likely, the device is going away, so put it into D3cold before |
2376 | * that. | |
05404d8f | 2377 | */ |
2c22e652 RW |
2378 | acpi_device_set_power(adev, ACPI_STATE_D3_COLD); |
2379 | adev->flags.initialized = false; | |
2380 | adev->flags.visited = false; | |
1da177e4 | 2381 | } |
ceaba663 KA |
2382 | EXPORT_SYMBOL_GPL(acpi_bus_trim); |
2383 | ||
e8b945c9 | 2384 | static int acpi_bus_scan_fixed(void) |
1da177e4 | 2385 | { |
4be44fcd | 2386 | int result = 0; |
c4168bff | 2387 | |
1da177e4 LT |
2388 | /* |
2389 | * Enumerate all fixed-feature devices. | |
2390 | */ | |
2c0d4fe0 RW |
2391 | if (!(acpi_gbl_FADT.flags & ACPI_FADT_POWER_BUTTON)) { |
2392 | struct acpi_device *device = NULL; | |
2393 | ||
5c478f49 | 2394 | result = acpi_add_single_object(&device, NULL, |
c4168bff | 2395 | ACPI_BUS_TYPE_POWER_BUTTON, |
2c0d4fe0 RW |
2396 | ACPI_STA_DEFAULT); |
2397 | if (result) | |
2398 | return result; | |
2399 | ||
88346167 | 2400 | device->flags.match_driver = true; |
2c0d4fe0 RW |
2401 | result = device_attach(&device->dev); |
2402 | if (result < 0) | |
2403 | return result; | |
2404 | ||
c10d7a13 | 2405 | device_init_wakeup(&device->dev, true); |
3fb02738 | 2406 | } |
1da177e4 | 2407 | |
2c0d4fe0 RW |
2408 | if (!(acpi_gbl_FADT.flags & ACPI_FADT_SLEEP_BUTTON)) { |
2409 | struct acpi_device *device = NULL; | |
2410 | ||
5c478f49 | 2411 | result = acpi_add_single_object(&device, NULL, |
c4168bff | 2412 | ACPI_BUS_TYPE_SLEEP_BUTTON, |
2c0d4fe0 RW |
2413 | ACPI_STA_DEFAULT); |
2414 | if (result) | |
2415 | return result; | |
2416 | ||
88346167 | 2417 | device->flags.match_driver = true; |
2c0d4fe0 | 2418 | result = device_attach(&device->dev); |
3fb02738 | 2419 | } |
1da177e4 | 2420 | |
2c0d4fe0 | 2421 | return result < 0 ? result : 0; |
1da177e4 LT |
2422 | } |
2423 | ||
e747f274 | 2424 | int __init acpi_scan_init(void) |
1da177e4 LT |
2425 | { |
2426 | int result; | |
1da177e4 | 2427 | |
5b327265 PM |
2428 | result = bus_register(&acpi_bus_type); |
2429 | if (result) { | |
2430 | /* We don't want to quit even if we failed to add suspend/resume */ | |
2431 | printk(KERN_ERR PREFIX "Could not register bus type\n"); | |
2432 | } | |
2433 | ||
92ef2a25 | 2434 | acpi_pci_root_init(); |
4daeaf68 | 2435 | acpi_pci_link_init(); |
ac212b69 | 2436 | acpi_processor_init(); |
f58b082a | 2437 | acpi_lpss_init(); |
2fa97feb | 2438 | acpi_cmos_rtc_init(); |
737f1a9f | 2439 | acpi_container_init(); |
0a347644 | 2440 | acpi_memory_hotplug_init(); |
eec15edb | 2441 | acpi_pnp_init(); |
3230bbfc | 2442 | acpi_int340x_thermal_init(); |
97d9a9e9 | 2443 | |
3757b948 | 2444 | mutex_lock(&acpi_scan_lock); |
1da177e4 LT |
2445 | /* |
2446 | * Enumerate devices in the ACPI namespace. | |
2447 | */ | |
0cd6ac52 RW |
2448 | result = acpi_bus_scan(ACPI_ROOT_OBJECT); |
2449 | if (result) | |
3757b948 | 2450 | goto out; |
1da177e4 | 2451 | |
0cd6ac52 | 2452 | result = acpi_bus_get_device(ACPI_ROOT_OBJECT, &acpi_root); |
1da177e4 | 2453 | if (result) |
3757b948 | 2454 | goto out; |
1da177e4 | 2455 | |
2650ef42 AL |
2456 | /* Fixed feature devices do not exist on HW-reduced platform */ |
2457 | if (!acpi_gbl_reduced_hardware) { | |
2458 | result = acpi_bus_scan_fixed(); | |
2459 | if (result) { | |
2460 | acpi_detach_data(acpi_root->handle, | |
2461 | acpi_scan_drop_device); | |
2462 | acpi_device_del(acpi_root); | |
2463 | put_device(&acpi_root->dev); | |
2464 | goto out; | |
2465 | } | |
b8bd759a | 2466 | } |
1da177e4 | 2467 | |
b8bd759a | 2468 | acpi_update_all_gpes(); |
3757b948 RW |
2469 | |
2470 | out: | |
2471 | mutex_unlock(&acpi_scan_lock); | |
2472 | return result; | |
1da177e4 | 2473 | } |