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