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(); | |
80 | acpi_set_hp_context(adev, hp, notify, uevent, NULL); | |
81 | acpi_unlock_hp_context(); | |
82 | } | |
83 | EXPORT_SYMBOL_GPL(acpi_initialize_hp_context); | |
84 | ||
ca589f94 RW |
85 | int acpi_scan_add_handler(struct acpi_scan_handler *handler) |
86 | { | |
87 | if (!handler || !handler->attach) | |
88 | return -EINVAL; | |
89 | ||
90 | list_add_tail(&handler->list_node, &acpi_scan_handlers_list); | |
91 | return 0; | |
92 | } | |
93 | ||
3f8055c3 RW |
94 | int acpi_scan_add_handler_with_hotplug(struct acpi_scan_handler *handler, |
95 | const char *hotplug_profile_name) | |
96 | { | |
97 | int error; | |
98 | ||
99 | error = acpi_scan_add_handler(handler); | |
100 | if (error) | |
101 | return error; | |
102 | ||
103 | acpi_sysfs_add_hotplug_profile(&handler->hotplug, hotplug_profile_name); | |
104 | return 0; | |
105 | } | |
106 | ||
29b71a1c TR |
107 | /* |
108 | * Creates hid/cid(s) string needed for modalias and uevent | |
109 | * e.g. on a device with hid:IBM0001 and cid:ACPI0001 you get: | |
110 | * char *modalias: "acpi:IBM0001:ACPI0001" | |
3d8e0090 ZR |
111 | * Return: 0: no _HID and no _CID |
112 | * -EINVAL: output error | |
113 | * -ENOMEM: output is truncated | |
29b71a1c | 114 | */ |
b3e572d2 AB |
115 | static int create_modalias(struct acpi_device *acpi_dev, char *modalias, |
116 | int size) | |
117 | { | |
29b71a1c | 118 | int len; |
5c9fcb5d | 119 | int count; |
7f47fa6c | 120 | struct acpi_hardware_id *id; |
29b71a1c | 121 | |
2b2ae7c7 TR |
122 | if (list_empty(&acpi_dev->pnp.ids)) |
123 | return 0; | |
124 | ||
5c9fcb5d | 125 | len = snprintf(modalias, size, "acpi:"); |
29b71a1c TR |
126 | size -= len; |
127 | ||
7f47fa6c BH |
128 | list_for_each_entry(id, &acpi_dev->pnp.ids, list) { |
129 | count = snprintf(&modalias[len], size, "%s:", id->id); | |
3d8e0090 ZR |
130 | if (count < 0) |
131 | return EINVAL; | |
132 | if (count >= size) | |
133 | return -ENOMEM; | |
5c9fcb5d ZR |
134 | len += count; |
135 | size -= count; | |
136 | } | |
137 | ||
29b71a1c TR |
138 | modalias[len] = '\0'; |
139 | return len; | |
140 | } | |
141 | ||
6eb2451f ZR |
142 | /* |
143 | * Creates uevent modalias field for ACPI enumerated devices. | |
144 | * Because the other buses does not support ACPI HIDs & CIDs. | |
145 | * e.g. for a device with hid:IBM0001 and cid:ACPI0001 you get: | |
146 | * "acpi:IBM0001:ACPI0001" | |
147 | */ | |
148 | int acpi_device_uevent_modalias(struct device *dev, struct kobj_uevent_env *env) | |
149 | { | |
150 | struct acpi_device *acpi_dev; | |
151 | int len; | |
152 | ||
153 | acpi_dev = ACPI_COMPANION(dev); | |
154 | if (!acpi_dev) | |
155 | return -ENODEV; | |
156 | ||
157 | /* Fall back to bus specific way of modalias exporting */ | |
158 | if (list_empty(&acpi_dev->pnp.ids)) | |
159 | return -ENODEV; | |
160 | ||
161 | if (add_uevent_var(env, "MODALIAS=")) | |
162 | return -ENOMEM; | |
163 | len = create_modalias(acpi_dev, &env->buf[env->buflen - 1], | |
164 | sizeof(env->buf) - env->buflen); | |
165 | if (len <= 0) | |
166 | return len; | |
167 | env->buflen += len; | |
168 | return 0; | |
169 | } | |
170 | EXPORT_SYMBOL_GPL(acpi_device_uevent_modalias); | |
171 | ||
172 | /* | |
173 | * Creates modalias sysfs attribute for ACPI enumerated devices. | |
174 | * Because the other buses does not support ACPI HIDs & CIDs. | |
175 | * e.g. for a device with hid:IBM0001 and cid:ACPI0001 you get: | |
176 | * "acpi:IBM0001:ACPI0001" | |
177 | */ | |
178 | int acpi_device_modalias(struct device *dev, char *buf, int size) | |
179 | { | |
180 | struct acpi_device *acpi_dev; | |
181 | int len; | |
182 | ||
183 | acpi_dev = ACPI_COMPANION(dev); | |
184 | if (!acpi_dev) | |
185 | return -ENODEV; | |
186 | ||
187 | /* Fall back to bus specific way of modalias exporting */ | |
188 | if (list_empty(&acpi_dev->pnp.ids)) | |
189 | return -ENODEV; | |
190 | ||
191 | len = create_modalias(acpi_dev, buf, size -1); | |
192 | if (len <= 0) | |
193 | return len; | |
194 | buf[len++] = '\n'; | |
195 | return len; | |
196 | } | |
197 | EXPORT_SYMBOL_GPL(acpi_device_modalias); | |
198 | ||
29b71a1c TR |
199 | static ssize_t |
200 | acpi_device_modalias_show(struct device *dev, struct device_attribute *attr, char *buf) { | |
201 | struct acpi_device *acpi_dev = to_acpi_device(dev); | |
202 | int len; | |
203 | ||
29b71a1c TR |
204 | len = create_modalias(acpi_dev, buf, 1024); |
205 | if (len <= 0) | |
3d8e0090 | 206 | return len; |
29b71a1c TR |
207 | buf[len++] = '\n'; |
208 | return len; | |
209 | } | |
210 | static DEVICE_ATTR(modalias, 0444, acpi_device_modalias_show, NULL); | |
211 | ||
caa73ea1 | 212 | bool acpi_scan_is_offline(struct acpi_device *adev, bool uevent) |
d22ddcbc RW |
213 | { |
214 | struct acpi_device_physical_node *pn; | |
215 | bool offline = true; | |
216 | ||
217 | mutex_lock(&adev->physical_node_lock); | |
218 | ||
219 | list_for_each_entry(pn, &adev->physical_node_list, node) | |
220 | if (device_supports_offline(pn->dev) && !pn->dev->offline) { | |
caa73ea1 RW |
221 | if (uevent) |
222 | kobject_uevent(&pn->dev->kobj, KOBJ_CHANGE); | |
223 | ||
d22ddcbc RW |
224 | offline = false; |
225 | break; | |
226 | } | |
227 | ||
228 | mutex_unlock(&adev->physical_node_lock); | |
229 | return offline; | |
230 | } | |
231 | ||
7f28ddec RW |
232 | static acpi_status acpi_bus_offline(acpi_handle handle, u32 lvl, void *data, |
233 | void **ret_p) | |
683058e3 RW |
234 | { |
235 | struct acpi_device *device = NULL; | |
236 | struct acpi_device_physical_node *pn; | |
303bfdb1 | 237 | bool second_pass = (bool)data; |
683058e3 RW |
238 | acpi_status status = AE_OK; |
239 | ||
240 | if (acpi_bus_get_device(handle, &device)) | |
241 | return AE_OK; | |
242 | ||
7f28ddec RW |
243 | if (device->handler && !device->handler->hotplug.enabled) { |
244 | *ret_p = &device->dev; | |
245 | return AE_SUPPORT; | |
246 | } | |
247 | ||
683058e3 RW |
248 | mutex_lock(&device->physical_node_lock); |
249 | ||
250 | list_for_each_entry(pn, &device->physical_node_list, node) { | |
251 | int ret; | |
252 | ||
303bfdb1 RW |
253 | if (second_pass) { |
254 | /* Skip devices offlined by the first pass. */ | |
255 | if (pn->put_online) | |
256 | continue; | |
257 | } else { | |
258 | pn->put_online = false; | |
259 | } | |
683058e3 RW |
260 | ret = device_offline(pn->dev); |
261 | if (acpi_force_hot_remove) | |
262 | continue; | |
263 | ||
303bfdb1 RW |
264 | if (ret >= 0) { |
265 | pn->put_online = !ret; | |
266 | } else { | |
267 | *ret_p = pn->dev; | |
268 | if (second_pass) { | |
269 | status = AE_ERROR; | |
270 | break; | |
271 | } | |
683058e3 | 272 | } |
683058e3 RW |
273 | } |
274 | ||
275 | mutex_unlock(&device->physical_node_lock); | |
276 | ||
277 | return status; | |
278 | } | |
279 | ||
7f28ddec RW |
280 | static acpi_status acpi_bus_online(acpi_handle handle, u32 lvl, void *data, |
281 | void **ret_p) | |
683058e3 RW |
282 | { |
283 | struct acpi_device *device = NULL; | |
284 | struct acpi_device_physical_node *pn; | |
285 | ||
286 | if (acpi_bus_get_device(handle, &device)) | |
287 | return AE_OK; | |
288 | ||
289 | mutex_lock(&device->physical_node_lock); | |
290 | ||
291 | list_for_each_entry(pn, &device->physical_node_list, node) | |
292 | if (pn->put_online) { | |
293 | device_online(pn->dev); | |
294 | pn->put_online = false; | |
295 | } | |
296 | ||
297 | mutex_unlock(&device->physical_node_lock); | |
298 | ||
299 | return AE_OK; | |
300 | } | |
301 | ||
d22ddcbc | 302 | static int acpi_scan_try_to_offline(struct acpi_device *device) |
1da177e4 | 303 | { |
5993c467 | 304 | acpi_handle handle = device->handle; |
d22ddcbc | 305 | struct device *errdev = NULL; |
a33ec399 | 306 | acpi_status status; |
f058cdf4 | 307 | |
303bfdb1 RW |
308 | /* |
309 | * Carry out two passes here and ignore errors in the first pass, | |
310 | * because if the devices in question are memory blocks and | |
311 | * CONFIG_MEMCG is set, one of the blocks may hold data structures | |
312 | * that the other blocks depend on, but it is not known in advance which | |
313 | * block holds them. | |
314 | * | |
315 | * If the first pass is successful, the second one isn't needed, though. | |
316 | */ | |
7f28ddec RW |
317 | status = acpi_walk_namespace(ACPI_TYPE_ANY, handle, ACPI_UINT32_MAX, |
318 | NULL, acpi_bus_offline, (void *)false, | |
319 | (void **)&errdev); | |
320 | if (status == AE_SUPPORT) { | |
321 | dev_warn(errdev, "Offline disabled.\n"); | |
322 | acpi_walk_namespace(ACPI_TYPE_ANY, handle, ACPI_UINT32_MAX, | |
323 | acpi_bus_online, NULL, NULL, NULL); | |
7f28ddec RW |
324 | return -EPERM; |
325 | } | |
326 | acpi_bus_offline(handle, 0, (void *)false, (void **)&errdev); | |
303bfdb1 RW |
327 | if (errdev) { |
328 | errdev = NULL; | |
683058e3 | 329 | acpi_walk_namespace(ACPI_TYPE_ANY, handle, ACPI_UINT32_MAX, |
7f28ddec RW |
330 | NULL, acpi_bus_offline, (void *)true, |
331 | (void **)&errdev); | |
303bfdb1 | 332 | if (!errdev || acpi_force_hot_remove) |
7f28ddec RW |
333 | acpi_bus_offline(handle, 0, (void *)true, |
334 | (void **)&errdev); | |
303bfdb1 RW |
335 | |
336 | if (errdev && !acpi_force_hot_remove) { | |
337 | dev_warn(errdev, "Offline failed.\n"); | |
7f28ddec | 338 | acpi_bus_online(handle, 0, NULL, NULL); |
303bfdb1 | 339 | acpi_walk_namespace(ACPI_TYPE_ANY, handle, |
7f28ddec RW |
340 | ACPI_UINT32_MAX, acpi_bus_online, |
341 | NULL, NULL, NULL); | |
303bfdb1 RW |
342 | return -EBUSY; |
343 | } | |
683058e3 | 344 | } |
d22ddcbc RW |
345 | return 0; |
346 | } | |
347 | ||
348 | static int acpi_scan_hot_remove(struct acpi_device *device) | |
349 | { | |
350 | acpi_handle handle = device->handle; | |
351 | unsigned long long sta; | |
352 | acpi_status status; | |
353 | ||
354 | if (device->handler->hotplug.demand_offline && !acpi_force_hot_remove) { | |
caa73ea1 | 355 | if (!acpi_scan_is_offline(device, true)) |
d22ddcbc RW |
356 | return -EBUSY; |
357 | } else { | |
358 | int error = acpi_scan_try_to_offline(device); | |
359 | if (error) | |
360 | return error; | |
361 | } | |
683058e3 | 362 | |
26d46867 | 363 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
0794469d | 364 | "Hot-removing device %s...\n", dev_name(&device->dev))); |
26d46867 | 365 | |
bfee26db | 366 | acpi_bus_trim(device); |
683058e3 | 367 | |
7d2421f8 | 368 | acpi_evaluate_lck(handle, 0); |
1da177e4 LT |
369 | /* |
370 | * TBD: _EJD support. | |
371 | */ | |
7d2421f8 JL |
372 | status = acpi_evaluate_ej0(handle); |
373 | if (status == AE_NOT_FOUND) | |
374 | return -ENODEV; | |
375 | else if (ACPI_FAILURE(status)) | |
376 | return -EIO; | |
1da177e4 | 377 | |
882fd12e TK |
378 | /* |
379 | * Verify if eject was indeed successful. If not, log an error | |
380 | * message. No need to call _OST since _EJ0 call was made OK. | |
381 | */ | |
382 | status = acpi_evaluate_integer(handle, "_STA", NULL, &sta); | |
383 | if (ACPI_FAILURE(status)) { | |
384 | acpi_handle_warn(handle, | |
385 | "Status check after eject failed (0x%x)\n", status); | |
386 | } else if (sta & ACPI_STA_DEVICE_ENABLED) { | |
387 | acpi_handle_warn(handle, | |
388 | "Eject incomplete - status 0x%llx\n", sta); | |
389 | } | |
390 | ||
a33ec399 RW |
391 | return 0; |
392 | } | |
1da177e4 | 393 | |
443fc820 RW |
394 | static int acpi_scan_device_not_present(struct acpi_device *adev) |
395 | { | |
396 | if (!acpi_device_enumerated(adev)) { | |
397 | dev_warn(&adev->dev, "Still not present\n"); | |
398 | return -EALREADY; | |
399 | } | |
400 | acpi_bus_trim(adev); | |
401 | return 0; | |
402 | } | |
403 | ||
c27b2c33 | 404 | static int acpi_scan_device_check(struct acpi_device *adev) |
a33ec399 | 405 | { |
f943db40 | 406 | int error; |
a33ec399 | 407 | |
443fc820 RW |
408 | acpi_bus_get_status(adev); |
409 | if (adev->status.present || adev->status.functional) { | |
410 | /* | |
411 | * This function is only called for device objects for which | |
412 | * matching scan handlers exist. The only situation in which | |
413 | * the scan handler is not attached to this device object yet | |
414 | * is when the device has just appeared (either it wasn't | |
415 | * present at all before or it was removed and then added | |
416 | * again). | |
417 | */ | |
418 | if (adev->handler) { | |
419 | dev_warn(&adev->dev, "Already enumerated\n"); | |
420 | return -EALREADY; | |
421 | } | |
422 | error = acpi_bus_scan(adev->handle); | |
423 | if (error) { | |
424 | dev_warn(&adev->dev, "Namespace scan failure\n"); | |
425 | return error; | |
426 | } | |
427 | if (!adev->handler) { | |
428 | dev_warn(&adev->dev, "Enumeration failure\n"); | |
429 | error = -ENODEV; | |
430 | } | |
431 | } else { | |
432 | error = acpi_scan_device_not_present(adev); | |
433 | } | |
434 | return error; | |
435 | } | |
436 | ||
437 | static int acpi_scan_bus_check(struct acpi_device *adev) | |
438 | { | |
439 | struct acpi_scan_handler *handler = adev->handler; | |
440 | struct acpi_device *child; | |
441 | int error; | |
442 | ||
443 | acpi_bus_get_status(adev); | |
444 | if (!(adev->status.present || adev->status.functional)) { | |
445 | acpi_scan_device_not_present(adev); | |
446 | return 0; | |
447 | } | |
448 | if (handler && handler->hotplug.scan_dependent) | |
449 | return handler->hotplug.scan_dependent(adev); | |
450 | ||
c27b2c33 RW |
451 | error = acpi_bus_scan(adev->handle); |
452 | if (error) { | |
453 | dev_warn(&adev->dev, "Namespace scan failure\n"); | |
454 | return error; | |
455 | } | |
443fc820 RW |
456 | list_for_each_entry(child, &adev->children, node) { |
457 | error = acpi_scan_bus_check(child); | |
458 | if (error) | |
459 | return error; | |
c27b2c33 RW |
460 | } |
461 | return 0; | |
a33ec399 RW |
462 | } |
463 | ||
3c2cc7ff RW |
464 | static int acpi_generic_hotplug_event(struct acpi_device *adev, u32 type) |
465 | { | |
466 | switch (type) { | |
467 | case ACPI_NOTIFY_BUS_CHECK: | |
468 | return acpi_scan_bus_check(adev); | |
469 | case ACPI_NOTIFY_DEVICE_CHECK: | |
470 | return acpi_scan_device_check(adev); | |
471 | case ACPI_NOTIFY_EJECT_REQUEST: | |
472 | case ACPI_OST_EC_OSPM_EJECT: | |
dd2151be RW |
473 | if (adev->handler && !adev->handler->hotplug.enabled) { |
474 | dev_info(&adev->dev, "Eject disabled\n"); | |
475 | return -EPERM; | |
476 | } | |
700b8422 RW |
477 | acpi_evaluate_ost(adev->handle, ACPI_NOTIFY_EJECT_REQUEST, |
478 | ACPI_OST_SC_EJECT_IN_PROGRESS, NULL); | |
3c2cc7ff RW |
479 | return acpi_scan_hot_remove(adev); |
480 | } | |
481 | return -EINVAL; | |
482 | } | |
483 | ||
1e3bcb59 | 484 | void acpi_device_hotplug(struct acpi_device *adev, u32 src) |
a33ec399 | 485 | { |
a33ec399 | 486 | u32 ost_code = ACPI_OST_SC_NON_SPECIFIC_FAILURE; |
3c2cc7ff | 487 | int error = -ENODEV; |
a33ec399 | 488 | |
683058e3 | 489 | lock_device_hotplug(); |
e0ae8fee | 490 | mutex_lock(&acpi_scan_lock); |
a33ec399 | 491 | |
c27b2c33 RW |
492 | /* |
493 | * The device object's ACPI handle cannot become invalid as long as we | |
3c2cc7ff | 494 | * are holding acpi_scan_lock, but it might have become invalid before |
c27b2c33 RW |
495 | * that lock was acquired. |
496 | */ | |
497 | if (adev->handle == INVALID_ACPI_HANDLE) | |
3c2cc7ff | 498 | goto err_out; |
c27b2c33 | 499 | |
1e2380cd RW |
500 | if (adev->flags.is_dock_station) { |
501 | error = dock_notify(adev, src); | |
502 | } else if (adev->flags.hotplug_notify) { | |
3c2cc7ff | 503 | error = acpi_generic_hotplug_event(adev, src); |
dd2151be RW |
504 | if (error == -EPERM) { |
505 | ost_code = ACPI_OST_SC_EJECT_NOT_SUPPORTED; | |
506 | goto err_out; | |
507 | } | |
3c2cc7ff | 508 | } else { |
be27b3dc | 509 | int (*notify)(struct acpi_device *, u32); |
3c2cc7ff RW |
510 | |
511 | acpi_lock_hp_context(); | |
be27b3dc | 512 | notify = adev->hp ? adev->hp->notify : NULL; |
3c2cc7ff RW |
513 | acpi_unlock_hp_context(); |
514 | /* | |
515 | * There may be additional notify handlers for device objects | |
516 | * without the .event() callback, so ignore them here. | |
517 | */ | |
be27b3dc RW |
518 | if (notify) |
519 | error = notify(adev, src); | |
3c2cc7ff RW |
520 | else |
521 | goto out; | |
a33ec399 | 522 | } |
c27b2c33 RW |
523 | if (!error) |
524 | ost_code = ACPI_OST_SC_SUCCESS; | |
a33ec399 | 525 | |
3c2cc7ff | 526 | err_out: |
700b8422 | 527 | acpi_evaluate_ost(adev->handle, src, ost_code, NULL); |
3c2cc7ff RW |
528 | |
529 | out: | |
78ea4639 | 530 | acpi_bus_put_acpi_device(adev); |
a33ec399 | 531 | mutex_unlock(&acpi_scan_lock); |
e0ae8fee | 532 | unlock_device_hotplug(); |
a33ec399 RW |
533 | } |
534 | ||
836aedb1 RW |
535 | static ssize_t real_power_state_show(struct device *dev, |
536 | struct device_attribute *attr, char *buf) | |
537 | { | |
538 | struct acpi_device *adev = to_acpi_device(dev); | |
539 | int state; | |
540 | int ret; | |
541 | ||
542 | ret = acpi_device_get_power(adev, &state); | |
543 | if (ret) | |
544 | return ret; | |
545 | ||
546 | return sprintf(buf, "%s\n", acpi_power_state_string(state)); | |
547 | } | |
548 | ||
549 | static DEVICE_ATTR(real_power_state, 0444, real_power_state_show, NULL); | |
550 | ||
551 | static ssize_t power_state_show(struct device *dev, | |
552 | struct device_attribute *attr, char *buf) | |
553 | { | |
554 | struct acpi_device *adev = to_acpi_device(dev); | |
555 | ||
556 | return sprintf(buf, "%s\n", acpi_power_state_string(adev->power.state)); | |
557 | } | |
558 | ||
559 | static DEVICE_ATTR(power_state, 0444, power_state_show, NULL); | |
560 | ||
1da177e4 | 561 | static ssize_t |
f883d9db PM |
562 | acpi_eject_store(struct device *d, struct device_attribute *attr, |
563 | const char *buf, size_t count) | |
1da177e4 | 564 | { |
f883d9db | 565 | struct acpi_device *acpi_device = to_acpi_device(d); |
a33ec399 RW |
566 | acpi_object_type not_used; |
567 | acpi_status status; | |
1da177e4 | 568 | |
a33ec399 | 569 | if (!count || buf[0] != '1') |
1da177e4 | 570 | return -EINVAL; |
1da177e4 | 571 | |
a33ec399 RW |
572 | if ((!acpi_device->handler || !acpi_device->handler->hotplug.enabled) |
573 | && !acpi_device->driver) | |
574 | return -ENODEV; | |
575 | ||
576 | status = acpi_get_type(acpi_device->handle, ¬_used); | |
577 | if (ACPI_FAILURE(status) || !acpi_device->flags.ejectable) | |
578 | return -ENODEV; | |
579 | ||
a33ec399 | 580 | get_device(&acpi_device->dev); |
1e3bcb59 | 581 | status = acpi_hotplug_schedule(acpi_device, ACPI_OST_EC_OSPM_EJECT); |
f943db40 RW |
582 | if (ACPI_SUCCESS(status)) |
583 | return count; | |
a33ec399 | 584 | |
f943db40 | 585 | put_device(&acpi_device->dev); |
700b8422 RW |
586 | acpi_evaluate_ost(acpi_device->handle, ACPI_OST_EC_OSPM_EJECT, |
587 | ACPI_OST_SC_NON_SPECIFIC_FAILURE, NULL); | |
5add99cf | 588 | return status == AE_NO_MEMORY ? -ENOMEM : -EAGAIN; |
1da177e4 LT |
589 | } |
590 | ||
f883d9db | 591 | static DEVICE_ATTR(eject, 0200, NULL, acpi_eject_store); |
1da177e4 | 592 | |
e49bd2dd ZR |
593 | static ssize_t |
594 | acpi_device_hid_show(struct device *dev, struct device_attribute *attr, char *buf) { | |
595 | struct acpi_device *acpi_dev = to_acpi_device(dev); | |
1da177e4 | 596 | |
ea8d82fd | 597 | return sprintf(buf, "%s\n", acpi_device_hid(acpi_dev)); |
1da177e4 | 598 | } |
e49bd2dd | 599 | static DEVICE_ATTR(hid, 0444, acpi_device_hid_show, NULL); |
1da177e4 | 600 | |
923d4a45 LZ |
601 | static ssize_t acpi_device_uid_show(struct device *dev, |
602 | struct device_attribute *attr, char *buf) | |
603 | { | |
604 | struct acpi_device *acpi_dev = to_acpi_device(dev); | |
605 | ||
606 | return sprintf(buf, "%s\n", acpi_dev->pnp.unique_id); | |
607 | } | |
608 | static DEVICE_ATTR(uid, 0444, acpi_device_uid_show, NULL); | |
609 | ||
610 | static ssize_t acpi_device_adr_show(struct device *dev, | |
611 | struct device_attribute *attr, char *buf) | |
612 | { | |
613 | struct acpi_device *acpi_dev = to_acpi_device(dev); | |
614 | ||
615 | return sprintf(buf, "0x%08x\n", | |
616 | (unsigned int)(acpi_dev->pnp.bus_address)); | |
617 | } | |
618 | static DEVICE_ATTR(adr, 0444, acpi_device_adr_show, NULL); | |
619 | ||
e49bd2dd ZR |
620 | static ssize_t |
621 | acpi_device_path_show(struct device *dev, struct device_attribute *attr, char *buf) { | |
622 | struct acpi_device *acpi_dev = to_acpi_device(dev); | |
623 | struct acpi_buffer path = {ACPI_ALLOCATE_BUFFER, NULL}; | |
624 | int result; | |
1da177e4 | 625 | |
e49bd2dd | 626 | result = acpi_get_name(acpi_dev->handle, ACPI_FULL_PATHNAME, &path); |
0c526d96 | 627 | if (result) |
e49bd2dd | 628 | goto end; |
1da177e4 | 629 | |
e49bd2dd ZR |
630 | result = sprintf(buf, "%s\n", (char*)path.pointer); |
631 | kfree(path.pointer); | |
0c526d96 | 632 | end: |
e49bd2dd | 633 | return result; |
1da177e4 | 634 | } |
e49bd2dd | 635 | static DEVICE_ATTR(path, 0444, acpi_device_path_show, NULL); |
1da177e4 | 636 | |
d1efe3c3 LO |
637 | /* sysfs file that shows description text from the ACPI _STR method */ |
638 | static ssize_t description_show(struct device *dev, | |
639 | struct device_attribute *attr, | |
640 | char *buf) { | |
641 | struct acpi_device *acpi_dev = to_acpi_device(dev); | |
642 | int result; | |
643 | ||
644 | if (acpi_dev->pnp.str_obj == NULL) | |
645 | return 0; | |
646 | ||
647 | /* | |
648 | * The _STR object contains a Unicode identifier for a device. | |
649 | * We need to convert to utf-8 so it can be displayed. | |
650 | */ | |
651 | result = utf16s_to_utf8s( | |
652 | (wchar_t *)acpi_dev->pnp.str_obj->buffer.pointer, | |
653 | acpi_dev->pnp.str_obj->buffer.length, | |
654 | UTF16_LITTLE_ENDIAN, buf, | |
655 | PAGE_SIZE); | |
656 | ||
657 | buf[result++] = '\n'; | |
658 | ||
659 | return result; | |
660 | } | |
661 | static DEVICE_ATTR(description, 0444, description_show, NULL); | |
662 | ||
bb74ac23 YI |
663 | static ssize_t |
664 | acpi_device_sun_show(struct device *dev, struct device_attribute *attr, | |
665 | char *buf) { | |
666 | struct acpi_device *acpi_dev = to_acpi_device(dev); | |
667 | ||
668 | return sprintf(buf, "%lu\n", acpi_dev->pnp.sun); | |
669 | } | |
670 | static DEVICE_ATTR(sun, 0444, acpi_device_sun_show, NULL); | |
671 | ||
c713cd7f SP |
672 | static ssize_t status_show(struct device *dev, struct device_attribute *attr, |
673 | char *buf) { | |
674 | struct acpi_device *acpi_dev = to_acpi_device(dev); | |
675 | acpi_status status; | |
676 | unsigned long long sta; | |
677 | ||
678 | status = acpi_evaluate_integer(acpi_dev->handle, "_STA", NULL, &sta); | |
679 | if (ACPI_FAILURE(status)) | |
680 | return -ENODEV; | |
681 | ||
682 | return sprintf(buf, "%llu\n", sta); | |
683 | } | |
684 | static DEVICE_ATTR_RO(status); | |
685 | ||
e49bd2dd | 686 | static int acpi_device_setup_files(struct acpi_device *dev) |
1da177e4 | 687 | { |
d1efe3c3 | 688 | struct acpi_buffer buffer = {ACPI_ALLOCATE_BUFFER, NULL}; |
f883d9db | 689 | acpi_status status; |
bb74ac23 | 690 | unsigned long long sun; |
e49bd2dd | 691 | int result = 0; |
1da177e4 LT |
692 | |
693 | /* | |
e49bd2dd | 694 | * Devices gotten from FADT don't have a "path" attribute |
1da177e4 | 695 | */ |
0c526d96 | 696 | if (dev->handle) { |
e49bd2dd | 697 | result = device_create_file(&dev->dev, &dev_attr_path); |
0c526d96 | 698 | if (result) |
e49bd2dd | 699 | goto end; |
1da177e4 LT |
700 | } |
701 | ||
2b2ae7c7 TR |
702 | if (!list_empty(&dev->pnp.ids)) { |
703 | result = device_create_file(&dev->dev, &dev_attr_hid); | |
704 | if (result) | |
705 | goto end; | |
1da177e4 | 706 | |
2b2ae7c7 TR |
707 | result = device_create_file(&dev->dev, &dev_attr_modalias); |
708 | if (result) | |
709 | goto end; | |
710 | } | |
29b71a1c | 711 | |
d1efe3c3 LO |
712 | /* |
713 | * If device has _STR, 'description' file is created | |
714 | */ | |
952c63e9 | 715 | if (acpi_has_method(dev->handle, "_STR")) { |
d1efe3c3 LO |
716 | status = acpi_evaluate_object(dev->handle, "_STR", |
717 | NULL, &buffer); | |
718 | if (ACPI_FAILURE(status)) | |
719 | buffer.pointer = NULL; | |
720 | dev->pnp.str_obj = buffer.pointer; | |
721 | result = device_create_file(&dev->dev, &dev_attr_description); | |
722 | if (result) | |
723 | goto end; | |
724 | } | |
725 | ||
d4e1a692 | 726 | if (dev->pnp.type.bus_address) |
923d4a45 LZ |
727 | result = device_create_file(&dev->dev, &dev_attr_adr); |
728 | if (dev->pnp.unique_id) | |
729 | result = device_create_file(&dev->dev, &dev_attr_uid); | |
730 | ||
bb74ac23 YI |
731 | status = acpi_evaluate_integer(dev->handle, "_SUN", NULL, &sun); |
732 | if (ACPI_SUCCESS(status)) { | |
733 | dev->pnp.sun = (unsigned long)sun; | |
734 | result = device_create_file(&dev->dev, &dev_attr_sun); | |
735 | if (result) | |
736 | goto end; | |
737 | } else { | |
738 | dev->pnp.sun = (unsigned long)-1; | |
739 | } | |
740 | ||
c713cd7f SP |
741 | if (acpi_has_method(dev->handle, "_STA")) { |
742 | result = device_create_file(&dev->dev, &dev_attr_status); | |
743 | if (result) | |
744 | goto end; | |
745 | } | |
746 | ||
e49bd2dd ZR |
747 | /* |
748 | * If device has _EJ0, 'eject' file is created that is used to trigger | |
749 | * hot-removal function from userland. | |
750 | */ | |
952c63e9 | 751 | if (acpi_has_method(dev->handle, "_EJ0")) { |
e49bd2dd | 752 | result = device_create_file(&dev->dev, &dev_attr_eject); |
836aedb1 RW |
753 | if (result) |
754 | return result; | |
755 | } | |
756 | ||
757 | if (dev->flags.power_manageable) { | |
758 | result = device_create_file(&dev->dev, &dev_attr_power_state); | |
759 | if (result) | |
760 | return result; | |
761 | ||
762 | if (dev->power.flags.power_resources) | |
763 | result = device_create_file(&dev->dev, | |
764 | &dev_attr_real_power_state); | |
765 | } | |
766 | ||
0c526d96 | 767 | end: |
e49bd2dd | 768 | return result; |
1da177e4 LT |
769 | } |
770 | ||
f883d9db | 771 | static void acpi_device_remove_files(struct acpi_device *dev) |
1da177e4 | 772 | { |
836aedb1 RW |
773 | if (dev->flags.power_manageable) { |
774 | device_remove_file(&dev->dev, &dev_attr_power_state); | |
775 | if (dev->power.flags.power_resources) | |
776 | device_remove_file(&dev->dev, | |
777 | &dev_attr_real_power_state); | |
778 | } | |
779 | ||
f883d9db | 780 | /* |
d1efe3c3 LO |
781 | * If device has _STR, remove 'description' file |
782 | */ | |
952c63e9 | 783 | if (acpi_has_method(dev->handle, "_STR")) { |
d1efe3c3 LO |
784 | kfree(dev->pnp.str_obj); |
785 | device_remove_file(&dev->dev, &dev_attr_description); | |
786 | } | |
787 | /* | |
788 | * If device has _EJ0, remove 'eject' file. | |
f883d9db | 789 | */ |
952c63e9 | 790 | if (acpi_has_method(dev->handle, "_EJ0")) |
f883d9db | 791 | device_remove_file(&dev->dev, &dev_attr_eject); |
1da177e4 | 792 | |
952c63e9 | 793 | if (acpi_has_method(dev->handle, "_SUN")) |
bb74ac23 YI |
794 | device_remove_file(&dev->dev, &dev_attr_sun); |
795 | ||
923d4a45 LZ |
796 | if (dev->pnp.unique_id) |
797 | device_remove_file(&dev->dev, &dev_attr_uid); | |
d4e1a692 | 798 | if (dev->pnp.type.bus_address) |
923d4a45 | 799 | device_remove_file(&dev->dev, &dev_attr_adr); |
1131b938 BH |
800 | device_remove_file(&dev->dev, &dev_attr_modalias); |
801 | device_remove_file(&dev->dev, &dev_attr_hid); | |
c713cd7f SP |
802 | if (acpi_has_method(dev->handle, "_STA")) |
803 | device_remove_file(&dev->dev, &dev_attr_status); | |
0c526d96 | 804 | if (dev->handle) |
e49bd2dd | 805 | device_remove_file(&dev->dev, &dev_attr_path); |
1da177e4 | 806 | } |
1da177e4 | 807 | /* -------------------------------------------------------------------------- |
9e89dde2 | 808 | ACPI Bus operations |
1da177e4 | 809 | -------------------------------------------------------------------------- */ |
29b71a1c | 810 | |
cf761af9 MW |
811 | static const struct acpi_device_id *__acpi_match_device( |
812 | struct acpi_device *device, const struct acpi_device_id *ids) | |
29b71a1c TR |
813 | { |
814 | const struct acpi_device_id *id; | |
7f47fa6c | 815 | struct acpi_hardware_id *hwid; |
29b71a1c | 816 | |
39a0ad87 ZY |
817 | /* |
818 | * If the device is not present, it is unnecessary to load device | |
819 | * driver for it. | |
820 | */ | |
821 | if (!device->status.present) | |
cf761af9 | 822 | return NULL; |
39a0ad87 | 823 | |
7f47fa6c BH |
824 | for (id = ids; id->id[0]; id++) |
825 | list_for_each_entry(hwid, &device->pnp.ids, list) | |
826 | if (!strcmp((char *) id->id, hwid->id)) | |
cf761af9 MW |
827 | return id; |
828 | ||
829 | return NULL; | |
830 | } | |
831 | ||
832 | /** | |
833 | * acpi_match_device - Match a struct device against a given list of ACPI IDs | |
834 | * @ids: Array of struct acpi_device_id object to match against. | |
835 | * @dev: The device structure to match. | |
836 | * | |
837 | * Check if @dev has a valid ACPI handle and if there is a struct acpi_device | |
838 | * object for that handle and use that object to match against a given list of | |
839 | * device IDs. | |
840 | * | |
841 | * Return a pointer to the first matching ID on success or %NULL on failure. | |
842 | */ | |
843 | const struct acpi_device_id *acpi_match_device(const struct acpi_device_id *ids, | |
844 | const struct device *dev) | |
845 | { | |
846 | struct acpi_device *adev; | |
0613e1f7 | 847 | acpi_handle handle = ACPI_HANDLE(dev); |
cf761af9 | 848 | |
0613e1f7 | 849 | if (!ids || !handle || acpi_bus_get_device(handle, &adev)) |
cf761af9 MW |
850 | return NULL; |
851 | ||
852 | return __acpi_match_device(adev, ids); | |
853 | } | |
854 | EXPORT_SYMBOL_GPL(acpi_match_device); | |
29b71a1c | 855 | |
cf761af9 MW |
856 | int acpi_match_device_ids(struct acpi_device *device, |
857 | const struct acpi_device_id *ids) | |
858 | { | |
859 | return __acpi_match_device(device, ids) ? 0 : -ENOENT; | |
29b71a1c TR |
860 | } |
861 | EXPORT_SYMBOL(acpi_match_device_ids); | |
862 | ||
0b224527 RW |
863 | static void acpi_free_power_resources_lists(struct acpi_device *device) |
864 | { | |
865 | int i; | |
866 | ||
993cbe59 RW |
867 | if (device->wakeup.flags.valid) |
868 | acpi_power_resources_list_free(&device->wakeup.resources); | |
869 | ||
0b224527 RW |
870 | if (!device->flags.power_manageable) |
871 | return; | |
872 | ||
873 | for (i = ACPI_STATE_D0; i <= ACPI_STATE_D3_HOT; i++) { | |
874 | struct acpi_device_power_state *ps = &device->power.states[i]; | |
875 | acpi_power_resources_list_free(&ps->resources); | |
876 | } | |
7f47fa6c BH |
877 | } |
878 | ||
1890a97a | 879 | static void acpi_device_release(struct device *dev) |
1da177e4 | 880 | { |
1890a97a | 881 | struct acpi_device *acpi_dev = to_acpi_device(dev); |
1da177e4 | 882 | |
c0af4175 | 883 | acpi_free_pnp_ids(&acpi_dev->pnp); |
0b224527 | 884 | acpi_free_power_resources_lists(acpi_dev); |
1890a97a | 885 | kfree(acpi_dev); |
1da177e4 LT |
886 | } |
887 | ||
5d9464a4 | 888 | static int acpi_bus_match(struct device *dev, struct device_driver *drv) |
9e89dde2 | 889 | { |
5d9464a4 PM |
890 | struct acpi_device *acpi_dev = to_acpi_device(dev); |
891 | struct acpi_driver *acpi_drv = to_acpi_driver(drv); | |
1da177e4 | 892 | |
209d3b17 | 893 | return acpi_dev->flags.match_driver |
805d410f | 894 | && !acpi_match_device_ids(acpi_dev, acpi_drv->ids); |
5d9464a4 | 895 | } |
1da177e4 | 896 | |
7eff2e7a | 897 | static int acpi_device_uevent(struct device *dev, struct kobj_uevent_env *env) |
1da177e4 | 898 | { |
5d9464a4 | 899 | struct acpi_device *acpi_dev = to_acpi_device(dev); |
7eff2e7a | 900 | int len; |
5d9464a4 | 901 | |
2b2ae7c7 TR |
902 | if (list_empty(&acpi_dev->pnp.ids)) |
903 | return 0; | |
904 | ||
7eff2e7a KS |
905 | if (add_uevent_var(env, "MODALIAS=")) |
906 | return -ENOMEM; | |
907 | len = create_modalias(acpi_dev, &env->buf[env->buflen - 1], | |
908 | sizeof(env->buf) - env->buflen); | |
3d8e0090 ZR |
909 | if (len <= 0) |
910 | return len; | |
7eff2e7a | 911 | env->buflen += len; |
9e89dde2 | 912 | return 0; |
1da177e4 LT |
913 | } |
914 | ||
46ec8598 BH |
915 | static void acpi_device_notify(acpi_handle handle, u32 event, void *data) |
916 | { | |
917 | struct acpi_device *device = data; | |
918 | ||
919 | device->driver->ops.notify(device, event); | |
920 | } | |
921 | ||
922 | static acpi_status acpi_device_notify_fixed(void *data) | |
923 | { | |
924 | struct acpi_device *device = data; | |
925 | ||
53de5356 BH |
926 | /* Fixed hardware devices have no handles */ |
927 | acpi_device_notify(NULL, ACPI_FIXED_HARDWARE_EVENT, device); | |
46ec8598 BH |
928 | return AE_OK; |
929 | } | |
930 | ||
931 | static int acpi_device_install_notify_handler(struct acpi_device *device) | |
932 | { | |
933 | acpi_status status; | |
46ec8598 | 934 | |
ccba2a36 | 935 | if (device->device_type == ACPI_BUS_TYPE_POWER_BUTTON) |
46ec8598 BH |
936 | status = |
937 | acpi_install_fixed_event_handler(ACPI_EVENT_POWER_BUTTON, | |
938 | acpi_device_notify_fixed, | |
939 | device); | |
ccba2a36 | 940 | else if (device->device_type == ACPI_BUS_TYPE_SLEEP_BUTTON) |
46ec8598 BH |
941 | status = |
942 | acpi_install_fixed_event_handler(ACPI_EVENT_SLEEP_BUTTON, | |
943 | acpi_device_notify_fixed, | |
944 | device); | |
945 | else | |
946 | status = acpi_install_notify_handler(device->handle, | |
947 | ACPI_DEVICE_NOTIFY, | |
948 | acpi_device_notify, | |
949 | device); | |
950 | ||
951 | if (ACPI_FAILURE(status)) | |
952 | return -EINVAL; | |
953 | return 0; | |
954 | } | |
955 | ||
956 | static void acpi_device_remove_notify_handler(struct acpi_device *device) | |
957 | { | |
ccba2a36 | 958 | if (device->device_type == ACPI_BUS_TYPE_POWER_BUTTON) |
46ec8598 BH |
959 | acpi_remove_fixed_event_handler(ACPI_EVENT_POWER_BUTTON, |
960 | acpi_device_notify_fixed); | |
ccba2a36 | 961 | else if (device->device_type == ACPI_BUS_TYPE_SLEEP_BUTTON) |
46ec8598 BH |
962 | acpi_remove_fixed_event_handler(ACPI_EVENT_SLEEP_BUTTON, |
963 | acpi_device_notify_fixed); | |
964 | else | |
965 | acpi_remove_notify_handler(device->handle, ACPI_DEVICE_NOTIFY, | |
966 | acpi_device_notify); | |
967 | } | |
968 | ||
d9e455f5 | 969 | static int acpi_device_probe(struct device *dev) |
1da177e4 | 970 | { |
5d9464a4 PM |
971 | struct acpi_device *acpi_dev = to_acpi_device(dev); |
972 | struct acpi_driver *acpi_drv = to_acpi_driver(dev->driver); | |
973 | int ret; | |
974 | ||
24071f47 RW |
975 | if (acpi_dev->handler) |
976 | return -EINVAL; | |
977 | ||
d9e455f5 RW |
978 | if (!acpi_drv->ops.add) |
979 | return -ENOSYS; | |
46ec8598 | 980 | |
d9e455f5 RW |
981 | ret = acpi_drv->ops.add(acpi_dev); |
982 | if (ret) | |
983 | return ret; | |
46ec8598 | 984 | |
d9e455f5 RW |
985 | acpi_dev->driver = acpi_drv; |
986 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, | |
987 | "Driver [%s] successfully bound to device [%s]\n", | |
988 | acpi_drv->name, acpi_dev->pnp.bus_id)); | |
989 | ||
990 | if (acpi_drv->ops.notify) { | |
991 | ret = acpi_device_install_notify_handler(acpi_dev); | |
992 | if (ret) { | |
993 | if (acpi_drv->ops.remove) | |
994 | acpi_drv->ops.remove(acpi_dev); | |
995 | ||
996 | acpi_dev->driver = NULL; | |
997 | acpi_dev->driver_data = NULL; | |
998 | return ret; | |
999 | } | |
5d9464a4 | 1000 | } |
d9e455f5 RW |
1001 | |
1002 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Found driver [%s] for device [%s]\n", | |
1003 | acpi_drv->name, acpi_dev->pnp.bus_id)); | |
1004 | get_device(dev); | |
1005 | return 0; | |
5d9464a4 | 1006 | } |
1da177e4 | 1007 | |
5d9464a4 PM |
1008 | static int acpi_device_remove(struct device * dev) |
1009 | { | |
1010 | struct acpi_device *acpi_dev = to_acpi_device(dev); | |
1011 | struct acpi_driver *acpi_drv = acpi_dev->driver; | |
1012 | ||
1013 | if (acpi_drv) { | |
46ec8598 BH |
1014 | if (acpi_drv->ops.notify) |
1015 | acpi_device_remove_notify_handler(acpi_dev); | |
5d9464a4 | 1016 | if (acpi_drv->ops.remove) |
51fac838 | 1017 | acpi_drv->ops.remove(acpi_dev); |
1da177e4 | 1018 | } |
5d9464a4 | 1019 | acpi_dev->driver = NULL; |
db89b4f0 | 1020 | acpi_dev->driver_data = NULL; |
1da177e4 | 1021 | |
5d9464a4 | 1022 | put_device(dev); |
9e89dde2 ZR |
1023 | return 0; |
1024 | } | |
1da177e4 | 1025 | |
55955aad | 1026 | struct bus_type acpi_bus_type = { |
9e89dde2 | 1027 | .name = "acpi", |
5d9464a4 PM |
1028 | .match = acpi_bus_match, |
1029 | .probe = acpi_device_probe, | |
1030 | .remove = acpi_device_remove, | |
1031 | .uevent = acpi_device_uevent, | |
9e89dde2 ZR |
1032 | }; |
1033 | ||
d783156e RW |
1034 | static void acpi_device_del(struct acpi_device *device) |
1035 | { | |
1036 | mutex_lock(&acpi_device_lock); | |
1037 | if (device->parent) | |
1038 | list_del(&device->node); | |
1039 | ||
1040 | list_del(&device->wakeup_list); | |
1041 | mutex_unlock(&acpi_device_lock); | |
1042 | ||
1043 | acpi_power_add_remove_device(device, false); | |
1044 | acpi_device_remove_files(device); | |
1045 | if (device->remove) | |
1046 | device->remove(device); | |
1047 | ||
1048 | device_del(&device->dev); | |
1049 | } | |
1050 | ||
1051 | static LIST_HEAD(acpi_device_del_list); | |
1052 | static DEFINE_MUTEX(acpi_device_del_lock); | |
1053 | ||
1054 | static void acpi_device_del_work_fn(struct work_struct *work_not_used) | |
1055 | { | |
1056 | for (;;) { | |
1057 | struct acpi_device *adev; | |
1058 | ||
1059 | mutex_lock(&acpi_device_del_lock); | |
1060 | ||
1061 | if (list_empty(&acpi_device_del_list)) { | |
1062 | mutex_unlock(&acpi_device_del_lock); | |
1063 | break; | |
1064 | } | |
1065 | adev = list_first_entry(&acpi_device_del_list, | |
1066 | struct acpi_device, del_list); | |
1067 | list_del(&adev->del_list); | |
1068 | ||
1069 | mutex_unlock(&acpi_device_del_lock); | |
1070 | ||
1071 | acpi_device_del(adev); | |
1072 | /* | |
1073 | * Drop references to all power resources that might have been | |
1074 | * used by the device. | |
1075 | */ | |
1076 | acpi_power_transition(adev, ACPI_STATE_D3_COLD); | |
1077 | put_device(&adev->dev); | |
1078 | } | |
1079 | } | |
1080 | ||
1081 | /** | |
1082 | * acpi_scan_drop_device - Drop an ACPI device object. | |
1083 | * @handle: Handle of an ACPI namespace node, not used. | |
1084 | * @context: Address of the ACPI device object to drop. | |
1085 | * | |
1086 | * This is invoked by acpi_ns_delete_node() during the removal of the ACPI | |
1087 | * namespace node the device object pointed to by @context is attached to. | |
1088 | * | |
1089 | * The unregistration is carried out asynchronously to avoid running | |
1090 | * acpi_device_del() under the ACPICA's namespace mutex and the list is used to | |
1091 | * ensure the correct ordering (the device objects must be unregistered in the | |
1092 | * same order in which the corresponding namespace nodes are deleted). | |
1093 | */ | |
1094 | static void acpi_scan_drop_device(acpi_handle handle, void *context) | |
caf5c03f | 1095 | { |
d783156e RW |
1096 | static DECLARE_WORK(work, acpi_device_del_work_fn); |
1097 | struct acpi_device *adev = context; | |
1098 | ||
1099 | mutex_lock(&acpi_device_del_lock); | |
1100 | ||
1101 | /* | |
1102 | * Use the ACPI hotplug workqueue which is ordered, so this work item | |
1103 | * won't run after any hotplug work items submitted subsequently. That | |
1104 | * prevents attempts to register device objects identical to those being | |
1105 | * deleted from happening concurrently (such attempts result from | |
1106 | * hotplug events handled via the ACPI hotplug workqueue). It also will | |
1107 | * run after all of the work items submitted previosuly, which helps | |
1108 | * those work items to ensure that they are not accessing stale device | |
1109 | * objects. | |
1110 | */ | |
1111 | if (list_empty(&acpi_device_del_list)) | |
1112 | acpi_queue_hotplug_work(&work); | |
1113 | ||
1114 | list_add_tail(&adev->del_list, &acpi_device_del_list); | |
1115 | /* Make acpi_ns_validate_handle() return NULL for this handle. */ | |
1116 | adev->handle = INVALID_ACPI_HANDLE; | |
1117 | ||
1118 | mutex_unlock(&acpi_device_del_lock); | |
caf5c03f RW |
1119 | } |
1120 | ||
78ea4639 RW |
1121 | static int acpi_get_device_data(acpi_handle handle, struct acpi_device **device, |
1122 | void (*callback)(void *)) | |
caf5c03f RW |
1123 | { |
1124 | acpi_status status; | |
1125 | ||
1126 | if (!device) | |
1127 | return -EINVAL; | |
1128 | ||
78ea4639 RW |
1129 | status = acpi_get_data_full(handle, acpi_scan_drop_device, |
1130 | (void **)device, callback); | |
caf5c03f RW |
1131 | if (ACPI_FAILURE(status) || !*device) { |
1132 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "No context for object [%p]\n", | |
1133 | handle)); | |
1134 | return -ENODEV; | |
1135 | } | |
1136 | return 0; | |
1137 | } | |
78ea4639 RW |
1138 | |
1139 | int acpi_bus_get_device(acpi_handle handle, struct acpi_device **device) | |
1140 | { | |
1141 | return acpi_get_device_data(handle, device, NULL); | |
1142 | } | |
6585925b | 1143 | EXPORT_SYMBOL(acpi_bus_get_device); |
caf5c03f | 1144 | |
78ea4639 RW |
1145 | static void get_acpi_device(void *dev) |
1146 | { | |
1147 | if (dev) | |
1148 | get_device(&((struct acpi_device *)dev)->dev); | |
1149 | } | |
1150 | ||
1151 | struct acpi_device *acpi_bus_get_acpi_device(acpi_handle handle) | |
1152 | { | |
1153 | struct acpi_device *adev = NULL; | |
1154 | ||
1155 | acpi_get_device_data(handle, &adev, get_acpi_device); | |
1156 | return adev; | |
1157 | } | |
1158 | ||
1159 | void acpi_bus_put_acpi_device(struct acpi_device *adev) | |
1160 | { | |
1161 | put_device(&adev->dev); | |
1162 | } | |
1163 | ||
cf860be6 RW |
1164 | int acpi_device_add(struct acpi_device *device, |
1165 | void (*release)(struct device *)) | |
1da177e4 | 1166 | { |
4be44fcd | 1167 | int result; |
e49bd2dd ZR |
1168 | struct acpi_device_bus_id *acpi_device_bus_id, *new_bus_id; |
1169 | int found = 0; | |
66b7ed40 | 1170 | |
d43e167d RW |
1171 | if (device->handle) { |
1172 | acpi_status status; | |
1173 | ||
d783156e | 1174 | status = acpi_attach_data(device->handle, acpi_scan_drop_device, |
d43e167d RW |
1175 | device); |
1176 | if (ACPI_FAILURE(status)) { | |
1177 | acpi_handle_err(device->handle, | |
1178 | "Unable to attach device data\n"); | |
1179 | return -ENODEV; | |
1180 | } | |
1181 | } | |
1182 | ||
9e89dde2 ZR |
1183 | /* |
1184 | * Linkage | |
1185 | * ------- | |
1186 | * Link this device to its parent and siblings. | |
1187 | */ | |
1188 | INIT_LIST_HEAD(&device->children); | |
1189 | INIT_LIST_HEAD(&device->node); | |
9e89dde2 | 1190 | INIT_LIST_HEAD(&device->wakeup_list); |
1033f904 | 1191 | INIT_LIST_HEAD(&device->physical_node_list); |
d783156e | 1192 | INIT_LIST_HEAD(&device->del_list); |
1033f904 | 1193 | mutex_init(&device->physical_node_lock); |
1da177e4 | 1194 | |
e49bd2dd ZR |
1195 | new_bus_id = kzalloc(sizeof(struct acpi_device_bus_id), GFP_KERNEL); |
1196 | if (!new_bus_id) { | |
d43e167d RW |
1197 | pr_err(PREFIX "Memory allocation error\n"); |
1198 | result = -ENOMEM; | |
1199 | goto err_detach; | |
1da177e4 | 1200 | } |
e49bd2dd | 1201 | |
9090589d | 1202 | mutex_lock(&acpi_device_lock); |
e49bd2dd ZR |
1203 | /* |
1204 | * Find suitable bus_id and instance number in acpi_bus_id_list | |
1205 | * If failed, create one and link it into acpi_bus_id_list | |
1206 | */ | |
1207 | list_for_each_entry(acpi_device_bus_id, &acpi_bus_id_list, node) { | |
1131b938 BH |
1208 | if (!strcmp(acpi_device_bus_id->bus_id, |
1209 | acpi_device_hid(device))) { | |
1210 | acpi_device_bus_id->instance_no++; | |
e49bd2dd ZR |
1211 | found = 1; |
1212 | kfree(new_bus_id); | |
1213 | break; | |
1214 | } | |
1da177e4 | 1215 | } |
0c526d96 | 1216 | if (!found) { |
e49bd2dd | 1217 | acpi_device_bus_id = new_bus_id; |
1131b938 | 1218 | strcpy(acpi_device_bus_id->bus_id, acpi_device_hid(device)); |
e49bd2dd ZR |
1219 | acpi_device_bus_id->instance_no = 0; |
1220 | list_add_tail(&acpi_device_bus_id->node, &acpi_bus_id_list); | |
1da177e4 | 1221 | } |
0794469d | 1222 | dev_set_name(&device->dev, "%s:%02x", acpi_device_bus_id->bus_id, acpi_device_bus_id->instance_no); |
1da177e4 | 1223 | |
33b57150 | 1224 | if (device->parent) |
9e89dde2 | 1225 | list_add_tail(&device->node, &device->parent->children); |
33b57150 | 1226 | |
9e89dde2 ZR |
1227 | if (device->wakeup.flags.valid) |
1228 | list_add_tail(&device->wakeup_list, &acpi_wakeup_device_list); | |
9090589d | 1229 | mutex_unlock(&acpi_device_lock); |
1da177e4 | 1230 | |
1890a97a | 1231 | if (device->parent) |
66b7ed40 | 1232 | device->dev.parent = &device->parent->dev; |
1890a97a | 1233 | device->dev.bus = &acpi_bus_type; |
82c7d5ef | 1234 | device->dev.release = release; |
cf860be6 | 1235 | result = device_add(&device->dev); |
0c526d96 | 1236 | if (result) { |
8b12b922 | 1237 | dev_err(&device->dev, "Error registering device\n"); |
d43e167d | 1238 | goto err; |
1da177e4 | 1239 | } |
1da177e4 | 1240 | |
e49bd2dd | 1241 | result = acpi_device_setup_files(device); |
0c526d96 | 1242 | if (result) |
0794469d KS |
1243 | printk(KERN_ERR PREFIX "Error creating sysfs interface for device %s\n", |
1244 | dev_name(&device->dev)); | |
1da177e4 | 1245 | |
1da177e4 | 1246 | return 0; |
d43e167d RW |
1247 | |
1248 | err: | |
9090589d | 1249 | mutex_lock(&acpi_device_lock); |
33b57150 | 1250 | if (device->parent) |
e49bd2dd | 1251 | list_del(&device->node); |
e49bd2dd | 1252 | list_del(&device->wakeup_list); |
9090589d | 1253 | mutex_unlock(&acpi_device_lock); |
d43e167d RW |
1254 | |
1255 | err_detach: | |
d783156e | 1256 | acpi_detach_data(device->handle, acpi_scan_drop_device); |
e49bd2dd | 1257 | return result; |
1da177e4 LT |
1258 | } |
1259 | ||
9e89dde2 ZR |
1260 | /* -------------------------------------------------------------------------- |
1261 | Driver Management | |
1262 | -------------------------------------------------------------------------- */ | |
9e89dde2 ZR |
1263 | /** |
1264 | * acpi_bus_register_driver - register a driver with the ACPI bus | |
1265 | * @driver: driver being registered | |
1266 | * | |
1267 | * Registers a driver with the ACPI bus. Searches the namespace for all | |
1268 | * devices that match the driver's criteria and binds. Returns zero for | |
1269 | * success or a negative error status for failure. | |
1270 | */ | |
1271 | int acpi_bus_register_driver(struct acpi_driver *driver) | |
1da177e4 | 1272 | { |
1890a97a | 1273 | int ret; |
1da177e4 | 1274 | |
9e89dde2 ZR |
1275 | if (acpi_disabled) |
1276 | return -ENODEV; | |
1890a97a PM |
1277 | driver->drv.name = driver->name; |
1278 | driver->drv.bus = &acpi_bus_type; | |
1279 | driver->drv.owner = driver->owner; | |
1da177e4 | 1280 | |
1890a97a PM |
1281 | ret = driver_register(&driver->drv); |
1282 | return ret; | |
9e89dde2 | 1283 | } |
1da177e4 | 1284 | |
9e89dde2 ZR |
1285 | EXPORT_SYMBOL(acpi_bus_register_driver); |
1286 | ||
1287 | /** | |
b27b14ce | 1288 | * acpi_bus_unregister_driver - unregisters a driver with the ACPI bus |
9e89dde2 ZR |
1289 | * @driver: driver to unregister |
1290 | * | |
1291 | * Unregisters a driver with the ACPI bus. Searches the namespace for all | |
1292 | * devices that match the driver's criteria and unbinds. | |
1293 | */ | |
1294 | void acpi_bus_unregister_driver(struct acpi_driver *driver) | |
1295 | { | |
1890a97a | 1296 | driver_unregister(&driver->drv); |
9e89dde2 ZR |
1297 | } |
1298 | ||
1299 | EXPORT_SYMBOL(acpi_bus_unregister_driver); | |
1300 | ||
9e89dde2 ZR |
1301 | /* -------------------------------------------------------------------------- |
1302 | Device Enumeration | |
1303 | -------------------------------------------------------------------------- */ | |
5c478f49 BH |
1304 | static struct acpi_device *acpi_bus_get_parent(acpi_handle handle) |
1305 | { | |
456de893 | 1306 | struct acpi_device *device = NULL; |
5c478f49 | 1307 | acpi_status status; |
5c478f49 BH |
1308 | |
1309 | /* | |
1310 | * Fixed hardware devices do not appear in the namespace and do not | |
1311 | * have handles, but we fabricate acpi_devices for them, so we have | |
1312 | * to deal with them specially. | |
1313 | */ | |
456de893 | 1314 | if (!handle) |
5c478f49 BH |
1315 | return acpi_root; |
1316 | ||
1317 | do { | |
1318 | status = acpi_get_parent(handle, &handle); | |
5c478f49 | 1319 | if (ACPI_FAILURE(status)) |
456de893 RW |
1320 | return status == AE_NULL_ENTRY ? NULL : acpi_root; |
1321 | } while (acpi_bus_get_device(handle, &device)); | |
1322 | return device; | |
5c478f49 BH |
1323 | } |
1324 | ||
9e89dde2 ZR |
1325 | acpi_status |
1326 | acpi_bus_get_ejd(acpi_handle handle, acpi_handle *ejd) | |
1327 | { | |
1328 | acpi_status status; | |
1329 | acpi_handle tmp; | |
1330 | struct acpi_buffer buffer = {ACPI_ALLOCATE_BUFFER, NULL}; | |
1331 | union acpi_object *obj; | |
1332 | ||
1333 | status = acpi_get_handle(handle, "_EJD", &tmp); | |
1334 | if (ACPI_FAILURE(status)) | |
1335 | return status; | |
1336 | ||
1337 | status = acpi_evaluate_object(handle, "_EJD", NULL, &buffer); | |
1338 | if (ACPI_SUCCESS(status)) { | |
1339 | obj = buffer.pointer; | |
3b5fee59 HM |
1340 | status = acpi_get_handle(ACPI_ROOT_OBJECT, obj->string.pointer, |
1341 | ejd); | |
9e89dde2 ZR |
1342 | kfree(buffer.pointer); |
1343 | } | |
1344 | return status; | |
1345 | } | |
1346 | EXPORT_SYMBOL_GPL(acpi_bus_get_ejd); | |
1347 | ||
e88c9c60 RW |
1348 | static int acpi_bus_extract_wakeup_device_power_package(acpi_handle handle, |
1349 | struct acpi_device_wakeup *wakeup) | |
9e89dde2 | 1350 | { |
b581a7f9 RW |
1351 | struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; |
1352 | union acpi_object *package = NULL; | |
9e89dde2 | 1353 | union acpi_object *element = NULL; |
b581a7f9 | 1354 | acpi_status status; |
e88c9c60 | 1355 | int err = -ENODATA; |
9e89dde2 | 1356 | |
b581a7f9 | 1357 | if (!wakeup) |
e88c9c60 | 1358 | return -EINVAL; |
9e89dde2 | 1359 | |
993cbe59 | 1360 | INIT_LIST_HEAD(&wakeup->resources); |
9e89dde2 | 1361 | |
b581a7f9 RW |
1362 | /* _PRW */ |
1363 | status = acpi_evaluate_object(handle, "_PRW", NULL, &buffer); | |
1364 | if (ACPI_FAILURE(status)) { | |
1365 | ACPI_EXCEPTION((AE_INFO, status, "Evaluating _PRW")); | |
e88c9c60 | 1366 | return err; |
b581a7f9 RW |
1367 | } |
1368 | ||
1369 | package = (union acpi_object *)buffer.pointer; | |
1370 | ||
e88c9c60 | 1371 | if (!package || package->package.count < 2) |
b581a7f9 | 1372 | goto out; |
b581a7f9 | 1373 | |
9e89dde2 | 1374 | element = &(package->package.elements[0]); |
e88c9c60 | 1375 | if (!element) |
b581a7f9 | 1376 | goto out; |
e88c9c60 | 1377 | |
9e89dde2 ZR |
1378 | if (element->type == ACPI_TYPE_PACKAGE) { |
1379 | if ((element->package.count < 2) || | |
1380 | (element->package.elements[0].type != | |
1381 | ACPI_TYPE_LOCAL_REFERENCE) | |
e88c9c60 | 1382 | || (element->package.elements[1].type != ACPI_TYPE_INTEGER)) |
b581a7f9 | 1383 | goto out; |
e88c9c60 | 1384 | |
b581a7f9 | 1385 | wakeup->gpe_device = |
9e89dde2 | 1386 | element->package.elements[0].reference.handle; |
b581a7f9 | 1387 | wakeup->gpe_number = |
9e89dde2 ZR |
1388 | (u32) element->package.elements[1].integer.value; |
1389 | } else if (element->type == ACPI_TYPE_INTEGER) { | |
b581a7f9 RW |
1390 | wakeup->gpe_device = NULL; |
1391 | wakeup->gpe_number = element->integer.value; | |
1392 | } else { | |
b581a7f9 RW |
1393 | goto out; |
1394 | } | |
9e89dde2 ZR |
1395 | |
1396 | element = &(package->package.elements[1]); | |
e88c9c60 | 1397 | if (element->type != ACPI_TYPE_INTEGER) |
b581a7f9 | 1398 | goto out; |
e88c9c60 | 1399 | |
b581a7f9 | 1400 | wakeup->sleep_state = element->integer.value; |
9e89dde2 | 1401 | |
e88c9c60 RW |
1402 | err = acpi_extract_power_resources(package, 2, &wakeup->resources); |
1403 | if (err) | |
b581a7f9 | 1404 | goto out; |
9e89dde2 | 1405 | |
0596a52b RW |
1406 | if (!list_empty(&wakeup->resources)) { |
1407 | int sleep_state; | |
9e89dde2 | 1408 | |
b5d667eb RW |
1409 | err = acpi_power_wakeup_list_init(&wakeup->resources, |
1410 | &sleep_state); | |
1411 | if (err) { | |
1412 | acpi_handle_warn(handle, "Retrieving current states " | |
1413 | "of wakeup power resources failed\n"); | |
1414 | acpi_power_resources_list_free(&wakeup->resources); | |
1415 | goto out; | |
1416 | } | |
0596a52b RW |
1417 | if (sleep_state < wakeup->sleep_state) { |
1418 | acpi_handle_warn(handle, "Overriding _PRW sleep state " | |
1419 | "(S%d) by S%d from power resources\n", | |
1420 | (int)wakeup->sleep_state, sleep_state); | |
1421 | wakeup->sleep_state = sleep_state; | |
1422 | } | |
1423 | } | |
bba63a29 | 1424 | acpi_setup_gpe_for_wake(handle, wakeup->gpe_device, wakeup->gpe_number); |
9874647b | 1425 | |
b581a7f9 RW |
1426 | out: |
1427 | kfree(buffer.pointer); | |
e88c9c60 | 1428 | return err; |
1da177e4 LT |
1429 | } |
1430 | ||
f517709d | 1431 | static void acpi_bus_set_run_wake_flags(struct acpi_device *device) |
1da177e4 | 1432 | { |
29b71a1c | 1433 | struct acpi_device_id button_device_ids[] = { |
29b71a1c | 1434 | {"PNP0C0C", 0}, |
b7e38304 | 1435 | {"PNP0C0D", 0}, |
29b71a1c TR |
1436 | {"PNP0C0E", 0}, |
1437 | {"", 0}, | |
1438 | }; | |
f517709d RW |
1439 | acpi_status status; |
1440 | acpi_event_status event_status; | |
1441 | ||
b67ea761 | 1442 | device->wakeup.flags.notifier_present = 0; |
f517709d RW |
1443 | |
1444 | /* Power button, Lid switch always enable wakeup */ | |
1445 | if (!acpi_match_device_ids(device, button_device_ids)) { | |
1446 | device->wakeup.flags.run_wake = 1; | |
b7e38304 ZR |
1447 | if (!acpi_match_device_ids(device, &button_device_ids[1])) { |
1448 | /* Do not use Lid/sleep button for S5 wakeup */ | |
1449 | if (device->wakeup.sleep_state == ACPI_STATE_S5) | |
1450 | device->wakeup.sleep_state = ACPI_STATE_S4; | |
1451 | } | |
f2b56bc8 | 1452 | device_set_wakeup_capable(&device->dev, true); |
f517709d RW |
1453 | return; |
1454 | } | |
1455 | ||
e8e18c95 RW |
1456 | status = acpi_get_gpe_status(device->wakeup.gpe_device, |
1457 | device->wakeup.gpe_number, | |
1458 | &event_status); | |
f517709d RW |
1459 | if (status == AE_OK) |
1460 | device->wakeup.flags.run_wake = | |
1461 | !!(event_status & ACPI_EVENT_FLAG_HANDLE); | |
1462 | } | |
1463 | ||
d57d09a4 | 1464 | static void acpi_bus_get_wakeup_device_flags(struct acpi_device *device) |
f517709d | 1465 | { |
e88c9c60 | 1466 | int err; |
29b71a1c | 1467 | |
d57d09a4 | 1468 | /* Presence of _PRW indicates wake capable */ |
952c63e9 | 1469 | if (!acpi_has_method(device->handle, "_PRW")) |
d57d09a4 RW |
1470 | return; |
1471 | ||
e88c9c60 RW |
1472 | err = acpi_bus_extract_wakeup_device_power_package(device->handle, |
1473 | &device->wakeup); | |
1474 | if (err) { | |
1475 | dev_err(&device->dev, "_PRW evaluation error: %d\n", err); | |
d57d09a4 | 1476 | return; |
9e89dde2 | 1477 | } |
1da177e4 | 1478 | |
9e89dde2 | 1479 | device->wakeup.flags.valid = 1; |
9b83ccd2 | 1480 | device->wakeup.prepare_count = 0; |
f517709d | 1481 | acpi_bus_set_run_wake_flags(device); |
729b2bdb ZY |
1482 | /* Call _PSW/_DSW object to disable its ability to wake the sleeping |
1483 | * system for the ACPI device with the _PRW object. | |
1484 | * The _PSW object is depreciated in ACPI 3.0 and is replaced by _DSW. | |
1485 | * So it is necessary to call _DSW object first. Only when it is not | |
1486 | * present will the _PSW object used. | |
1487 | */ | |
e88c9c60 RW |
1488 | err = acpi_device_sleep_wake(device, 0, 0, 0); |
1489 | if (err) | |
77e76609 RW |
1490 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
1491 | "error in _DSW or _PSW evaluation\n")); | |
1da177e4 | 1492 | } |
1da177e4 | 1493 | |
f33ce568 RW |
1494 | static void acpi_bus_init_power_state(struct acpi_device *device, int state) |
1495 | { | |
1496 | struct acpi_device_power_state *ps = &device->power.states[state]; | |
ef85bdbe RW |
1497 | char pathname[5] = { '_', 'P', 'R', '0' + state, '\0' }; |
1498 | struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; | |
f33ce568 | 1499 | acpi_status status; |
bf325f95 | 1500 | |
f33ce568 RW |
1501 | INIT_LIST_HEAD(&ps->resources); |
1502 | ||
ef85bdbe RW |
1503 | /* Evaluate "_PRx" to get referenced power resources */ |
1504 | status = acpi_evaluate_object(device->handle, pathname, NULL, &buffer); | |
1505 | if (ACPI_SUCCESS(status)) { | |
1506 | union acpi_object *package = buffer.pointer; | |
1507 | ||
1508 | if (buffer.length && package | |
1509 | && package->type == ACPI_TYPE_PACKAGE | |
1510 | && package->package.count) { | |
e88c9c60 RW |
1511 | int err = acpi_extract_power_resources(package, 0, |
1512 | &ps->resources); | |
1513 | if (!err) | |
ef85bdbe | 1514 | device->power.flags.power_resources = 1; |
f33ce568 | 1515 | } |
ef85bdbe | 1516 | ACPI_FREE(buffer.pointer); |
f33ce568 RW |
1517 | } |
1518 | ||
1519 | /* Evaluate "_PSx" to see if we can do explicit sets */ | |
ef85bdbe | 1520 | pathname[2] = 'S'; |
952c63e9 | 1521 | if (acpi_has_method(device->handle, pathname)) |
f33ce568 RW |
1522 | ps->flags.explicit_set = 1; |
1523 | ||
1524 | /* | |
1525 | * State is valid if there are means to put the device into it. | |
1526 | * D3hot is only valid if _PR3 present. | |
1527 | */ | |
ef85bdbe | 1528 | if (!list_empty(&ps->resources) |
f33ce568 RW |
1529 | || (ps->flags.explicit_set && state < ACPI_STATE_D3_HOT)) { |
1530 | ps->flags.valid = 1; | |
1531 | ps->flags.os_accessible = 1; | |
1532 | } | |
1533 | ||
1534 | ps->power = -1; /* Unknown - driver assigned */ | |
1535 | ps->latency = -1; /* Unknown - driver assigned */ | |
1536 | } | |
1537 | ||
d43e167d | 1538 | static void acpi_bus_get_power_flags(struct acpi_device *device) |
1da177e4 | 1539 | { |
8bc5053b | 1540 | u32 i; |
1a365616 | 1541 | |
d43e167d | 1542 | /* Presence of _PS0|_PR0 indicates 'power manageable' */ |
952c63e9 JL |
1543 | if (!acpi_has_method(device->handle, "_PS0") && |
1544 | !acpi_has_method(device->handle, "_PR0")) | |
1545 | return; | |
1a365616 | 1546 | |
d43e167d | 1547 | device->flags.power_manageable = 1; |
4be44fcd | 1548 | |
9e89dde2 ZR |
1549 | /* |
1550 | * Power Management Flags | |
1551 | */ | |
952c63e9 | 1552 | if (acpi_has_method(device->handle, "_PSC")) |
9e89dde2 | 1553 | device->power.flags.explicit_get = 1; |
952c63e9 | 1554 | if (acpi_has_method(device->handle, "_IRC")) |
9e89dde2 | 1555 | device->power.flags.inrush_current = 1; |
1da177e4 | 1556 | |
9e89dde2 ZR |
1557 | /* |
1558 | * Enumerate supported power management states | |
1559 | */ | |
f33ce568 RW |
1560 | for (i = ACPI_STATE_D0; i <= ACPI_STATE_D3_HOT; i++) |
1561 | acpi_bus_init_power_state(device, i); | |
bf325f95 | 1562 | |
0b224527 | 1563 | INIT_LIST_HEAD(&device->power.states[ACPI_STATE_D3_COLD].resources); |
1da177e4 | 1564 | |
9e89dde2 ZR |
1565 | /* Set defaults for D0 and D3 states (always valid) */ |
1566 | device->power.states[ACPI_STATE_D0].flags.valid = 1; | |
1567 | device->power.states[ACPI_STATE_D0].power = 100; | |
8ad928d5 RW |
1568 | device->power.states[ACPI_STATE_D3_COLD].flags.valid = 1; |
1569 | device->power.states[ACPI_STATE_D3_COLD].power = 0; | |
c8f7a62c | 1570 | |
5c7dd710 RW |
1571 | /* Set D3cold's explicit_set flag if _PS3 exists. */ |
1572 | if (device->power.states[ACPI_STATE_D3_HOT].flags.explicit_set) | |
1573 | device->power.states[ACPI_STATE_D3_COLD].flags.explicit_set = 1; | |
1574 | ||
1399dfcd AL |
1575 | /* Presence of _PS3 or _PRx means we can put the device into D3 cold */ |
1576 | if (device->power.states[ACPI_STATE_D3_HOT].flags.explicit_set || | |
1577 | device->power.flags.power_resources) | |
1578 | device->power.states[ACPI_STATE_D3_COLD].flags.os_accessible = 1; | |
1579 | ||
b3785492 RW |
1580 | if (acpi_bus_init_power(device)) { |
1581 | acpi_free_power_resources_lists(device); | |
1582 | device->flags.power_manageable = 0; | |
1583 | } | |
9e89dde2 | 1584 | } |
c8f7a62c | 1585 | |
d43e167d | 1586 | static void acpi_bus_get_flags(struct acpi_device *device) |
1da177e4 | 1587 | { |
1da177e4 | 1588 | /* Presence of _STA indicates 'dynamic_status' */ |
952c63e9 | 1589 | if (acpi_has_method(device->handle, "_STA")) |
1da177e4 LT |
1590 | device->flags.dynamic_status = 1; |
1591 | ||
1da177e4 | 1592 | /* Presence of _RMV indicates 'removable' */ |
952c63e9 | 1593 | if (acpi_has_method(device->handle, "_RMV")) |
1da177e4 LT |
1594 | device->flags.removable = 1; |
1595 | ||
1596 | /* Presence of _EJD|_EJ0 indicates 'ejectable' */ | |
952c63e9 JL |
1597 | if (acpi_has_method(device->handle, "_EJD") || |
1598 | acpi_has_method(device->handle, "_EJ0")) | |
1da177e4 | 1599 | device->flags.ejectable = 1; |
1da177e4 LT |
1600 | } |
1601 | ||
c7bcb4e9 | 1602 | static void acpi_device_get_busid(struct acpi_device *device) |
1da177e4 | 1603 | { |
4be44fcd LB |
1604 | char bus_id[5] = { '?', 0 }; |
1605 | struct acpi_buffer buffer = { sizeof(bus_id), bus_id }; | |
1606 | int i = 0; | |
1da177e4 LT |
1607 | |
1608 | /* | |
1609 | * Bus ID | |
1610 | * ------ | |
1611 | * The device's Bus ID is simply the object name. | |
1612 | * TBD: Shouldn't this value be unique (within the ACPI namespace)? | |
1613 | */ | |
859ac9a4 | 1614 | if (ACPI_IS_ROOT_DEVICE(device)) { |
1da177e4 | 1615 | strcpy(device->pnp.bus_id, "ACPI"); |
859ac9a4 BH |
1616 | return; |
1617 | } | |
1618 | ||
1619 | switch (device->device_type) { | |
1da177e4 LT |
1620 | case ACPI_BUS_TYPE_POWER_BUTTON: |
1621 | strcpy(device->pnp.bus_id, "PWRF"); | |
1622 | break; | |
1623 | case ACPI_BUS_TYPE_SLEEP_BUTTON: | |
1624 | strcpy(device->pnp.bus_id, "SLPF"); | |
1625 | break; | |
1626 | default: | |
66b7ed40 | 1627 | acpi_get_name(device->handle, ACPI_SINGLE_NAME, &buffer); |
1da177e4 LT |
1628 | /* Clean up trailing underscores (if any) */ |
1629 | for (i = 3; i > 1; i--) { | |
1630 | if (bus_id[i] == '_') | |
1631 | bus_id[i] = '\0'; | |
1632 | else | |
1633 | break; | |
1634 | } | |
1635 | strcpy(device->pnp.bus_id, bus_id); | |
1636 | break; | |
1637 | } | |
1638 | } | |
1639 | ||
ebf4df8d JL |
1640 | /* |
1641 | * acpi_ata_match - see if an acpi object is an ATA device | |
1642 | * | |
1643 | * If an acpi object has one of the ACPI ATA methods defined, | |
1644 | * then we can safely call it an ATA device. | |
1645 | */ | |
1646 | bool acpi_ata_match(acpi_handle handle) | |
1647 | { | |
1648 | return acpi_has_method(handle, "_GTF") || | |
1649 | acpi_has_method(handle, "_GTM") || | |
1650 | acpi_has_method(handle, "_STM") || | |
1651 | acpi_has_method(handle, "_SDD"); | |
1652 | } | |
1653 | ||
54735266 | 1654 | /* |
d4e1a692 | 1655 | * acpi_bay_match - see if an acpi object is an ejectable driver bay |
54735266 ZR |
1656 | * |
1657 | * If an acpi object is ejectable and has one of the ACPI ATA methods defined, | |
1658 | * then we can safely call it an ejectable drive bay | |
1659 | */ | |
ebf4df8d | 1660 | bool acpi_bay_match(acpi_handle handle) |
d4e1a692 | 1661 | { |
54735266 ZR |
1662 | acpi_handle phandle; |
1663 | ||
952c63e9 | 1664 | if (!acpi_has_method(handle, "_EJ0")) |
ebf4df8d JL |
1665 | return false; |
1666 | if (acpi_ata_match(handle)) | |
1667 | return true; | |
1668 | if (ACPI_FAILURE(acpi_get_parent(handle, &phandle))) | |
1669 | return false; | |
54735266 | 1670 | |
ebf4df8d | 1671 | return acpi_ata_match(phandle); |
54735266 ZR |
1672 | } |
1673 | ||
b43109fa | 1674 | bool acpi_device_is_battery(struct acpi_device *adev) |
1e2380cd | 1675 | { |
b43109fa | 1676 | struct acpi_hardware_id *hwid; |
1e2380cd | 1677 | |
b43109fa RW |
1678 | list_for_each_entry(hwid, &adev->pnp.ids, list) |
1679 | if (!strcmp("PNP0C0A", hwid->id)) | |
1680 | return true; | |
1e2380cd | 1681 | |
b43109fa | 1682 | return false; |
1e2380cd RW |
1683 | } |
1684 | ||
b43109fa | 1685 | static bool is_ejectable_bay(struct acpi_device *adev) |
1e2380cd | 1686 | { |
b43109fa RW |
1687 | acpi_handle handle = adev->handle; |
1688 | ||
1689 | if (acpi_has_method(handle, "_EJ0") && acpi_device_is_battery(adev)) | |
1e2380cd RW |
1690 | return true; |
1691 | ||
1692 | return acpi_bay_match(handle); | |
1693 | } | |
1694 | ||
3620f2f2 | 1695 | /* |
d4e1a692 | 1696 | * acpi_dock_match - see if an acpi object has a _DCK method |
3620f2f2 | 1697 | */ |
ebf4df8d | 1698 | bool acpi_dock_match(acpi_handle handle) |
3620f2f2 | 1699 | { |
ebf4df8d | 1700 | return acpi_has_method(handle, "_DCK"); |
3620f2f2 FS |
1701 | } |
1702 | ||
620e112c | 1703 | const char *acpi_device_hid(struct acpi_device *device) |
15b8dd53 | 1704 | { |
7f47fa6c | 1705 | struct acpi_hardware_id *hid; |
15b8dd53 | 1706 | |
2b2ae7c7 TR |
1707 | if (list_empty(&device->pnp.ids)) |
1708 | return dummy_hid; | |
1709 | ||
7f47fa6c BH |
1710 | hid = list_first_entry(&device->pnp.ids, struct acpi_hardware_id, list); |
1711 | return hid->id; | |
1712 | } | |
1713 | EXPORT_SYMBOL(acpi_device_hid); | |
15b8dd53 | 1714 | |
d4e1a692 | 1715 | static void acpi_add_id(struct acpi_device_pnp *pnp, const char *dev_id) |
7f47fa6c BH |
1716 | { |
1717 | struct acpi_hardware_id *id; | |
15b8dd53 | 1718 | |
7f47fa6c BH |
1719 | id = kmalloc(sizeof(*id), GFP_KERNEL); |
1720 | if (!id) | |
1721 | return; | |
15b8dd53 | 1722 | |
581de59e | 1723 | id->id = kstrdup(dev_id, GFP_KERNEL); |
7f47fa6c BH |
1724 | if (!id->id) { |
1725 | kfree(id); | |
1726 | return; | |
15b8dd53 BM |
1727 | } |
1728 | ||
d4e1a692 TK |
1729 | list_add_tail(&id->list, &pnp->ids); |
1730 | pnp->type.hardware_id = 1; | |
15b8dd53 BM |
1731 | } |
1732 | ||
222e82ac DW |
1733 | /* |
1734 | * Old IBM workstations have a DSDT bug wherein the SMBus object | |
1735 | * lacks the SMBUS01 HID and the methods do not have the necessary "_" | |
1736 | * prefix. Work around this. | |
1737 | */ | |
ebf4df8d | 1738 | static bool acpi_ibm_smbus_match(acpi_handle handle) |
222e82ac | 1739 | { |
ebf4df8d JL |
1740 | char node_name[ACPI_PATH_SEGMENT_LENGTH]; |
1741 | struct acpi_buffer path = { sizeof(node_name), node_name }; | |
222e82ac DW |
1742 | |
1743 | if (!dmi_name_in_vendors("IBM")) | |
ebf4df8d | 1744 | return false; |
222e82ac DW |
1745 | |
1746 | /* Look for SMBS object */ | |
ebf4df8d JL |
1747 | if (ACPI_FAILURE(acpi_get_name(handle, ACPI_SINGLE_NAME, &path)) || |
1748 | strcmp("SMBS", path.pointer)) | |
1749 | return false; | |
222e82ac DW |
1750 | |
1751 | /* Does it have the necessary (but misnamed) methods? */ | |
952c63e9 JL |
1752 | if (acpi_has_method(handle, "SBI") && |
1753 | acpi_has_method(handle, "SBR") && | |
1754 | acpi_has_method(handle, "SBW")) | |
ebf4df8d JL |
1755 | return true; |
1756 | ||
1757 | return false; | |
222e82ac DW |
1758 | } |
1759 | ||
ae3caa80 JL |
1760 | static bool acpi_object_is_system_bus(acpi_handle handle) |
1761 | { | |
1762 | acpi_handle tmp; | |
1763 | ||
1764 | if (ACPI_SUCCESS(acpi_get_handle(NULL, "\\_SB", &tmp)) && | |
1765 | tmp == handle) | |
1766 | return true; | |
1767 | if (ACPI_SUCCESS(acpi_get_handle(NULL, "\\_TZ", &tmp)) && | |
1768 | tmp == handle) | |
1769 | return true; | |
1770 | ||
1771 | return false; | |
1772 | } | |
1773 | ||
c0af4175 TK |
1774 | static void acpi_set_pnp_ids(acpi_handle handle, struct acpi_device_pnp *pnp, |
1775 | int device_type) | |
1da177e4 | 1776 | { |
4be44fcd | 1777 | acpi_status status; |
57f3674f | 1778 | struct acpi_device_info *info; |
78e25fef | 1779 | struct acpi_pnp_device_id_list *cid_list; |
7f47fa6c | 1780 | int i; |
1da177e4 | 1781 | |
c0af4175 | 1782 | switch (device_type) { |
1da177e4 | 1783 | case ACPI_BUS_TYPE_DEVICE: |
c0af4175 TK |
1784 | if (handle == ACPI_ROOT_OBJECT) { |
1785 | acpi_add_id(pnp, ACPI_SYSTEM_HID); | |
859ac9a4 BH |
1786 | break; |
1787 | } | |
1788 | ||
c0af4175 | 1789 | status = acpi_get_object_info(handle, &info); |
1da177e4 | 1790 | if (ACPI_FAILURE(status)) { |
c0af4175 TK |
1791 | pr_err(PREFIX "%s: Error reading device info\n", |
1792 | __func__); | |
1da177e4 LT |
1793 | return; |
1794 | } | |
1795 | ||
1da177e4 | 1796 | if (info->valid & ACPI_VALID_HID) |
c0af4175 | 1797 | acpi_add_id(pnp, info->hardware_id.string); |
57f3674f | 1798 | if (info->valid & ACPI_VALID_CID) { |
15b8dd53 | 1799 | cid_list = &info->compatible_id_list; |
57f3674f | 1800 | for (i = 0; i < cid_list->count; i++) |
c0af4175 | 1801 | acpi_add_id(pnp, cid_list->ids[i].string); |
57f3674f | 1802 | } |
1da177e4 | 1803 | if (info->valid & ACPI_VALID_ADR) { |
c0af4175 TK |
1804 | pnp->bus_address = info->address; |
1805 | pnp->type.bus_address = 1; | |
1da177e4 | 1806 | } |
ccf78040 | 1807 | if (info->valid & ACPI_VALID_UID) |
c0af4175 | 1808 | pnp->unique_id = kstrdup(info->unique_id.string, |
ccf78040 | 1809 | GFP_KERNEL); |
ae843332 | 1810 | |
a83893ae BH |
1811 | kfree(info); |
1812 | ||
57f3674f BH |
1813 | /* |
1814 | * Some devices don't reliably have _HIDs & _CIDs, so add | |
1815 | * synthetic HIDs to make sure drivers can find them. | |
1816 | */ | |
c0af4175 TK |
1817 | if (acpi_is_video_device(handle)) |
1818 | acpi_add_id(pnp, ACPI_VIDEO_HID); | |
ebf4df8d | 1819 | else if (acpi_bay_match(handle)) |
c0af4175 | 1820 | acpi_add_id(pnp, ACPI_BAY_HID); |
ebf4df8d | 1821 | else if (acpi_dock_match(handle)) |
c0af4175 | 1822 | acpi_add_id(pnp, ACPI_DOCK_HID); |
ebf4df8d | 1823 | else if (acpi_ibm_smbus_match(handle)) |
c0af4175 | 1824 | acpi_add_id(pnp, ACPI_SMBUS_IBM_HID); |
ae3caa80 JL |
1825 | else if (list_empty(&pnp->ids) && |
1826 | acpi_object_is_system_bus(handle)) { | |
1827 | /* \_SB, \_TZ, LNXSYBUS */ | |
1828 | acpi_add_id(pnp, ACPI_BUS_HID); | |
c0af4175 TK |
1829 | strcpy(pnp->device_name, ACPI_BUS_DEVICE_NAME); |
1830 | strcpy(pnp->device_class, ACPI_BUS_CLASS); | |
b7b30de5 | 1831 | } |
54735266 | 1832 | |
1da177e4 LT |
1833 | break; |
1834 | case ACPI_BUS_TYPE_POWER: | |
c0af4175 | 1835 | acpi_add_id(pnp, ACPI_POWER_HID); |
1da177e4 LT |
1836 | break; |
1837 | case ACPI_BUS_TYPE_PROCESSOR: | |
c0af4175 | 1838 | acpi_add_id(pnp, ACPI_PROCESSOR_OBJECT_HID); |
1da177e4 | 1839 | break; |
1da177e4 | 1840 | case ACPI_BUS_TYPE_THERMAL: |
c0af4175 | 1841 | acpi_add_id(pnp, ACPI_THERMAL_HID); |
1da177e4 LT |
1842 | break; |
1843 | case ACPI_BUS_TYPE_POWER_BUTTON: | |
c0af4175 | 1844 | acpi_add_id(pnp, ACPI_BUTTON_HID_POWERF); |
1da177e4 LT |
1845 | break; |
1846 | case ACPI_BUS_TYPE_SLEEP_BUTTON: | |
c0af4175 | 1847 | acpi_add_id(pnp, ACPI_BUTTON_HID_SLEEPF); |
1da177e4 LT |
1848 | break; |
1849 | } | |
1da177e4 LT |
1850 | } |
1851 | ||
c0af4175 TK |
1852 | void acpi_free_pnp_ids(struct acpi_device_pnp *pnp) |
1853 | { | |
1854 | struct acpi_hardware_id *id, *tmp; | |
1855 | ||
1856 | list_for_each_entry_safe(id, tmp, &pnp->ids, list) { | |
1857 | kfree(id->id); | |
1858 | kfree(id); | |
1859 | } | |
1860 | kfree(pnp->unique_id); | |
1861 | } | |
1862 | ||
82c7d5ef RW |
1863 | void acpi_init_device_object(struct acpi_device *device, acpi_handle handle, |
1864 | int type, unsigned long long sta) | |
1da177e4 | 1865 | { |
d43e167d RW |
1866 | INIT_LIST_HEAD(&device->pnp.ids); |
1867 | device->device_type = type; | |
1868 | device->handle = handle; | |
1869 | device->parent = acpi_bus_get_parent(handle); | |
25db115b | 1870 | acpi_set_device_status(device, sta); |
d43e167d | 1871 | acpi_device_get_busid(device); |
c0af4175 | 1872 | acpi_set_pnp_ids(handle, &device->pnp, type); |
d43e167d | 1873 | acpi_bus_get_flags(device); |
2c0d4fe0 | 1874 | device->flags.match_driver = false; |
202317a5 RW |
1875 | device->flags.initialized = true; |
1876 | device->flags.visited = false; | |
cf860be6 RW |
1877 | device_initialize(&device->dev); |
1878 | dev_set_uevent_suppress(&device->dev, true); | |
1879 | } | |
bc3b0772 | 1880 | |
cf860be6 RW |
1881 | void acpi_device_add_finalize(struct acpi_device *device) |
1882 | { | |
1883 | dev_set_uevent_suppress(&device->dev, false); | |
1884 | kobject_uevent(&device->dev.kobj, KOBJ_ADD); | |
1da177e4 LT |
1885 | } |
1886 | ||
5c478f49 BH |
1887 | static int acpi_add_single_object(struct acpi_device **child, |
1888 | acpi_handle handle, int type, | |
2c0d4fe0 | 1889 | unsigned long long sta) |
1da177e4 | 1890 | { |
77c24888 BH |
1891 | int result; |
1892 | struct acpi_device *device; | |
29aaefa6 | 1893 | struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; |
1da177e4 | 1894 | |
36bcbec7 | 1895 | device = kzalloc(sizeof(struct acpi_device), GFP_KERNEL); |
1da177e4 | 1896 | if (!device) { |
6468463a | 1897 | printk(KERN_ERR PREFIX "Memory allocation error\n"); |
d550d98d | 1898 | return -ENOMEM; |
1da177e4 | 1899 | } |
1da177e4 | 1900 | |
d43e167d RW |
1901 | acpi_init_device_object(device, handle, type, sta); |
1902 | acpi_bus_get_power_flags(device); | |
d57d09a4 | 1903 | acpi_bus_get_wakeup_device_flags(device); |
1da177e4 | 1904 | |
cf860be6 | 1905 | result = acpi_device_add(device, acpi_device_release); |
d43e167d | 1906 | if (result) { |
718fb0de | 1907 | acpi_device_release(&device->dev); |
d43e167d RW |
1908 | return result; |
1909 | } | |
1da177e4 | 1910 | |
d43e167d | 1911 | acpi_power_add_remove_device(device, true); |
cf860be6 | 1912 | acpi_device_add_finalize(device); |
d43e167d RW |
1913 | acpi_get_name(handle, ACPI_FULL_PATHNAME, &buffer); |
1914 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Added %s [%s] parent %s\n", | |
1915 | dev_name(&device->dev), (char *) buffer.pointer, | |
1916 | device->parent ? dev_name(&device->parent->dev) : "(null)")); | |
1917 | kfree(buffer.pointer); | |
1918 | *child = device; | |
1919 | return 0; | |
bf325f95 RW |
1920 | } |
1921 | ||
778cbc1d BH |
1922 | static int acpi_bus_type_and_status(acpi_handle handle, int *type, |
1923 | unsigned long long *sta) | |
1da177e4 | 1924 | { |
778cbc1d BH |
1925 | acpi_status status; |
1926 | acpi_object_type acpi_type; | |
1da177e4 | 1927 | |
778cbc1d | 1928 | status = acpi_get_type(handle, &acpi_type); |
51a85faf | 1929 | if (ACPI_FAILURE(status)) |
778cbc1d | 1930 | return -ENODEV; |
4be44fcd | 1931 | |
778cbc1d | 1932 | switch (acpi_type) { |
51a85faf BH |
1933 | case ACPI_TYPE_ANY: /* for ACPI_ROOT_OBJECT */ |
1934 | case ACPI_TYPE_DEVICE: | |
778cbc1d BH |
1935 | *type = ACPI_BUS_TYPE_DEVICE; |
1936 | status = acpi_bus_get_status_handle(handle, sta); | |
1937 | if (ACPI_FAILURE(status)) | |
1938 | return -ENODEV; | |
51a85faf BH |
1939 | break; |
1940 | case ACPI_TYPE_PROCESSOR: | |
778cbc1d BH |
1941 | *type = ACPI_BUS_TYPE_PROCESSOR; |
1942 | status = acpi_bus_get_status_handle(handle, sta); | |
1943 | if (ACPI_FAILURE(status)) | |
1944 | return -ENODEV; | |
51a85faf BH |
1945 | break; |
1946 | case ACPI_TYPE_THERMAL: | |
778cbc1d BH |
1947 | *type = ACPI_BUS_TYPE_THERMAL; |
1948 | *sta = ACPI_STA_DEFAULT; | |
51a85faf BH |
1949 | break; |
1950 | case ACPI_TYPE_POWER: | |
778cbc1d BH |
1951 | *type = ACPI_BUS_TYPE_POWER; |
1952 | *sta = ACPI_STA_DEFAULT; | |
51a85faf BH |
1953 | break; |
1954 | default: | |
778cbc1d | 1955 | return -ENODEV; |
51a85faf | 1956 | } |
1da177e4 | 1957 | |
778cbc1d BH |
1958 | return 0; |
1959 | } | |
1960 | ||
202317a5 RW |
1961 | bool acpi_device_is_present(struct acpi_device *adev) |
1962 | { | |
1963 | if (adev->status.present || adev->status.functional) | |
1964 | return true; | |
1965 | ||
1966 | adev->flags.initialized = false; | |
1967 | return false; | |
1968 | } | |
1969 | ||
4b59cc1f RW |
1970 | static bool acpi_scan_handler_matching(struct acpi_scan_handler *handler, |
1971 | char *idstr, | |
1972 | const struct acpi_device_id **matchid) | |
1973 | { | |
1974 | const struct acpi_device_id *devid; | |
1975 | ||
1976 | for (devid = handler->ids; devid->id[0]; devid++) | |
1977 | if (!strcmp((char *)devid->id, idstr)) { | |
1978 | if (matchid) | |
1979 | *matchid = devid; | |
1980 | ||
1981 | return true; | |
1982 | } | |
1983 | ||
1984 | return false; | |
1985 | } | |
1986 | ||
6b772e8f TK |
1987 | static struct acpi_scan_handler *acpi_scan_match_handler(char *idstr, |
1988 | const struct acpi_device_id **matchid) | |
1989 | { | |
1990 | struct acpi_scan_handler *handler; | |
1991 | ||
1992 | list_for_each_entry(handler, &acpi_scan_handlers_list, list_node) | |
1993 | if (acpi_scan_handler_matching(handler, idstr, matchid)) | |
1994 | return handler; | |
1995 | ||
1996 | return NULL; | |
1997 | } | |
1998 | ||
3f8055c3 RW |
1999 | void acpi_scan_hotplug_enabled(struct acpi_hotplug_profile *hotplug, bool val) |
2000 | { | |
3f8055c3 RW |
2001 | if (!!hotplug->enabled == !!val) |
2002 | return; | |
2003 | ||
2004 | mutex_lock(&acpi_scan_lock); | |
2005 | ||
2006 | hotplug->enabled = val; | |
3f8055c3 RW |
2007 | |
2008 | mutex_unlock(&acpi_scan_lock); | |
2009 | } | |
2010 | ||
3c2cc7ff | 2011 | static void acpi_scan_init_hotplug(struct acpi_device *adev) |
a33ec399 | 2012 | { |
6b772e8f | 2013 | struct acpi_hardware_id *hwid; |
a33ec399 | 2014 | |
b43109fa | 2015 | if (acpi_dock_match(adev->handle) || is_ejectable_bay(adev)) { |
1e2380cd RW |
2016 | acpi_dock_add(adev); |
2017 | return; | |
2018 | } | |
3c2cc7ff RW |
2019 | list_for_each_entry(hwid, &adev->pnp.ids, list) { |
2020 | struct acpi_scan_handler *handler; | |
a33ec399 | 2021 | |
6b772e8f | 2022 | handler = acpi_scan_match_handler(hwid->id, NULL); |
1a699476 RW |
2023 | if (handler) { |
2024 | adev->flags.hotplug_notify = true; | |
2025 | break; | |
2026 | } | |
3c2cc7ff | 2027 | } |
a33ec399 RW |
2028 | } |
2029 | ||
e3863094 RW |
2030 | static acpi_status acpi_bus_check_add(acpi_handle handle, u32 lvl_not_used, |
2031 | void *not_used, void **return_value) | |
778cbc1d | 2032 | { |
805d410f | 2033 | struct acpi_device *device = NULL; |
778cbc1d BH |
2034 | int type; |
2035 | unsigned long long sta; | |
2036 | int result; | |
2037 | ||
4002bf38 RW |
2038 | acpi_bus_get_device(handle, &device); |
2039 | if (device) | |
2040 | goto out; | |
2041 | ||
778cbc1d BH |
2042 | result = acpi_bus_type_and_status(handle, &type, &sta); |
2043 | if (result) | |
2044 | return AE_OK; | |
2045 | ||
82c7d5ef RW |
2046 | if (type == ACPI_BUS_TYPE_POWER) { |
2047 | acpi_add_power_resource(handle); | |
2048 | return AE_OK; | |
2049 | } | |
2050 | ||
2c0d4fe0 | 2051 | acpi_add_single_object(&device, handle, type, sta); |
e3b87f8a | 2052 | if (!device) |
51a85faf | 2053 | return AE_CTRL_DEPTH; |
1da177e4 | 2054 | |
3c2cc7ff RW |
2055 | acpi_scan_init_hotplug(device); |
2056 | ||
4002bf38 | 2057 | out: |
51a85faf BH |
2058 | if (!*return_value) |
2059 | *return_value = device; | |
805d410f | 2060 | |
51a85faf BH |
2061 | return AE_OK; |
2062 | } | |
3fb02738 | 2063 | |
c5698074 | 2064 | static int acpi_scan_attach_handler(struct acpi_device *device) |
ca589f94 | 2065 | { |
c5698074 RW |
2066 | struct acpi_hardware_id *hwid; |
2067 | int ret = 0; | |
ca589f94 | 2068 | |
c5698074 | 2069 | list_for_each_entry(hwid, &device->pnp.ids, list) { |
87b85b3c | 2070 | const struct acpi_device_id *devid; |
c5698074 | 2071 | struct acpi_scan_handler *handler; |
ca589f94 | 2072 | |
c5698074 RW |
2073 | handler = acpi_scan_match_handler(hwid->id, &devid); |
2074 | if (handler) { | |
9cb32acf | 2075 | device->handler = handler; |
87b85b3c | 2076 | ret = handler->attach(device, devid); |
9cb32acf | 2077 | if (ret > 0) |
c5698074 | 2078 | break; |
9cb32acf RW |
2079 | |
2080 | device->handler = NULL; | |
2081 | if (ret < 0) | |
c5698074 | 2082 | break; |
ca589f94 RW |
2083 | } |
2084 | } | |
2085 | return ret; | |
2086 | } | |
2087 | ||
2c22e652 | 2088 | static void acpi_bus_attach(struct acpi_device *device) |
51a85faf | 2089 | { |
2c22e652 | 2090 | struct acpi_device *child; |
1e2380cd | 2091 | acpi_handle ejd; |
ca589f94 | 2092 | int ret; |
3fb02738 | 2093 | |
1e2380cd RW |
2094 | if (ACPI_SUCCESS(acpi_bus_get_ejd(device->handle, &ejd))) |
2095 | register_dock_dependent_device(device, ejd); | |
2096 | ||
2c22e652 | 2097 | acpi_bus_get_status(device); |
202317a5 | 2098 | /* Skip devices that are not present. */ |
2c22e652 RW |
2099 | if (!acpi_device_is_present(device)) { |
2100 | device->flags.visited = false; | |
2101 | return; | |
2102 | } | |
3a391a39 | 2103 | if (device->handler) |
2c22e652 | 2104 | goto ok; |
3a391a39 | 2105 | |
202317a5 RW |
2106 | if (!device->flags.initialized) { |
2107 | acpi_bus_update_power(device, NULL); | |
2108 | device->flags.initialized = true; | |
2109 | } | |
2c22e652 | 2110 | device->flags.visited = false; |
ca589f94 | 2111 | ret = acpi_scan_attach_handler(device); |
6931007c | 2112 | if (ret < 0) |
2c22e652 | 2113 | return; |
6931007c RW |
2114 | |
2115 | device->flags.match_driver = true; | |
2c22e652 RW |
2116 | if (!ret) { |
2117 | ret = device_attach(&device->dev); | |
2118 | if (ret < 0) | |
2119 | return; | |
2120 | } | |
202317a5 | 2121 | device->flags.visited = true; |
202317a5 | 2122 | |
2c22e652 RW |
2123 | ok: |
2124 | list_for_each_entry(child, &device->children, node) | |
2125 | acpi_bus_attach(child); | |
1da177e4 | 2126 | } |
1da177e4 | 2127 | |
636458de | 2128 | /** |
b8bd759a | 2129 | * acpi_bus_scan - Add ACPI device node objects in a given namespace scope. |
636458de | 2130 | * @handle: Root of the namespace scope to scan. |
7779688f | 2131 | * |
636458de RW |
2132 | * Scan a given ACPI tree (probably recently hot-plugged) and create and add |
2133 | * found devices. | |
7779688f | 2134 | * |
636458de RW |
2135 | * If no devices were found, -ENODEV is returned, but it does not mean that |
2136 | * there has been a real error. There just have been no suitable ACPI objects | |
2137 | * in the table trunk from which the kernel could create a device and add an | |
2138 | * appropriate driver. | |
3757b948 RW |
2139 | * |
2140 | * Must be called under acpi_scan_lock. | |
7779688f | 2141 | */ |
b8bd759a | 2142 | int acpi_bus_scan(acpi_handle handle) |
3fb02738 | 2143 | { |
b8bd759a | 2144 | void *device = NULL; |
3fb02738 | 2145 | |
b8bd759a RW |
2146 | if (ACPI_SUCCESS(acpi_bus_check_add(handle, 0, NULL, &device))) |
2147 | acpi_walk_namespace(ACPI_TYPE_ANY, handle, ACPI_UINT32_MAX, | |
2148 | acpi_bus_check_add, NULL, NULL, &device); | |
3fb02738 | 2149 | |
2c22e652 RW |
2150 | if (device) { |
2151 | acpi_bus_attach(device); | |
2152 | return 0; | |
05404d8f | 2153 | } |
2c22e652 | 2154 | return -ENODEV; |
3fb02738 | 2155 | } |
2c22e652 | 2156 | EXPORT_SYMBOL(acpi_bus_scan); |
1da177e4 | 2157 | |
3757b948 | 2158 | /** |
2c22e652 RW |
2159 | * acpi_bus_trim - Detach scan handlers and drivers from ACPI device objects. |
2160 | * @adev: Root of the ACPI namespace scope to walk. | |
3757b948 RW |
2161 | * |
2162 | * Must be called under acpi_scan_lock. | |
2163 | */ | |
2c22e652 | 2164 | void acpi_bus_trim(struct acpi_device *adev) |
1da177e4 | 2165 | { |
2c22e652 RW |
2166 | struct acpi_scan_handler *handler = adev->handler; |
2167 | struct acpi_device *child; | |
2168 | ||
2169 | list_for_each_entry_reverse(child, &adev->children, node) | |
2170 | acpi_bus_trim(child); | |
2171 | ||
a951c773 | 2172 | adev->flags.match_driver = false; |
2c22e652 RW |
2173 | if (handler) { |
2174 | if (handler->detach) | |
2175 | handler->detach(adev); | |
2176 | ||
2177 | adev->handler = NULL; | |
2178 | } else { | |
2179 | device_release_driver(&adev->dev); | |
2180 | } | |
05404d8f | 2181 | /* |
2c22e652 RW |
2182 | * Most likely, the device is going away, so put it into D3cold before |
2183 | * that. | |
05404d8f | 2184 | */ |
2c22e652 RW |
2185 | acpi_device_set_power(adev, ACPI_STATE_D3_COLD); |
2186 | adev->flags.initialized = false; | |
2187 | adev->flags.visited = false; | |
1da177e4 | 2188 | } |
ceaba663 KA |
2189 | EXPORT_SYMBOL_GPL(acpi_bus_trim); |
2190 | ||
e8b945c9 | 2191 | static int acpi_bus_scan_fixed(void) |
1da177e4 | 2192 | { |
4be44fcd | 2193 | int result = 0; |
c4168bff | 2194 | |
1da177e4 LT |
2195 | /* |
2196 | * Enumerate all fixed-feature devices. | |
2197 | */ | |
2c0d4fe0 RW |
2198 | if (!(acpi_gbl_FADT.flags & ACPI_FADT_POWER_BUTTON)) { |
2199 | struct acpi_device *device = NULL; | |
2200 | ||
5c478f49 | 2201 | result = acpi_add_single_object(&device, NULL, |
c4168bff | 2202 | ACPI_BUS_TYPE_POWER_BUTTON, |
2c0d4fe0 RW |
2203 | ACPI_STA_DEFAULT); |
2204 | if (result) | |
2205 | return result; | |
2206 | ||
88346167 | 2207 | device->flags.match_driver = true; |
2c0d4fe0 RW |
2208 | result = device_attach(&device->dev); |
2209 | if (result < 0) | |
2210 | return result; | |
2211 | ||
c10d7a13 | 2212 | device_init_wakeup(&device->dev, true); |
3fb02738 | 2213 | } |
1da177e4 | 2214 | |
2c0d4fe0 RW |
2215 | if (!(acpi_gbl_FADT.flags & ACPI_FADT_SLEEP_BUTTON)) { |
2216 | struct acpi_device *device = NULL; | |
2217 | ||
5c478f49 | 2218 | result = acpi_add_single_object(&device, NULL, |
c4168bff | 2219 | ACPI_BUS_TYPE_SLEEP_BUTTON, |
2c0d4fe0 RW |
2220 | ACPI_STA_DEFAULT); |
2221 | if (result) | |
2222 | return result; | |
2223 | ||
88346167 | 2224 | device->flags.match_driver = true; |
2c0d4fe0 | 2225 | result = device_attach(&device->dev); |
3fb02738 | 2226 | } |
1da177e4 | 2227 | |
2c0d4fe0 | 2228 | return result < 0 ? result : 0; |
1da177e4 LT |
2229 | } |
2230 | ||
e747f274 | 2231 | int __init acpi_scan_init(void) |
1da177e4 LT |
2232 | { |
2233 | int result; | |
1da177e4 | 2234 | |
5b327265 PM |
2235 | result = bus_register(&acpi_bus_type); |
2236 | if (result) { | |
2237 | /* We don't want to quit even if we failed to add suspend/resume */ | |
2238 | printk(KERN_ERR PREFIX "Could not register bus type\n"); | |
2239 | } | |
2240 | ||
92ef2a25 | 2241 | acpi_pci_root_init(); |
4daeaf68 | 2242 | acpi_pci_link_init(); |
ac212b69 | 2243 | acpi_processor_init(); |
141a297b | 2244 | acpi_platform_init(); |
f58b082a | 2245 | acpi_lpss_init(); |
2fa97feb | 2246 | acpi_cmos_rtc_init(); |
737f1a9f | 2247 | acpi_container_init(); |
0a347644 | 2248 | acpi_memory_hotplug_init(); |
97d9a9e9 | 2249 | |
3757b948 | 2250 | mutex_lock(&acpi_scan_lock); |
1da177e4 LT |
2251 | /* |
2252 | * Enumerate devices in the ACPI namespace. | |
2253 | */ | |
0cd6ac52 RW |
2254 | result = acpi_bus_scan(ACPI_ROOT_OBJECT); |
2255 | if (result) | |
3757b948 | 2256 | goto out; |
1da177e4 | 2257 | |
0cd6ac52 | 2258 | result = acpi_bus_get_device(ACPI_ROOT_OBJECT, &acpi_root); |
1da177e4 | 2259 | if (result) |
3757b948 | 2260 | goto out; |
1da177e4 | 2261 | |
b8bd759a RW |
2262 | result = acpi_bus_scan_fixed(); |
2263 | if (result) { | |
202317a5 RW |
2264 | acpi_detach_data(acpi_root->handle, acpi_scan_drop_device); |
2265 | acpi_device_del(acpi_root); | |
2266 | put_device(&acpi_root->dev); | |
3757b948 | 2267 | goto out; |
b8bd759a | 2268 | } |
1da177e4 | 2269 | |
b8bd759a | 2270 | acpi_update_all_gpes(); |
3757b948 RW |
2271 | |
2272 | out: | |
2273 | mutex_unlock(&acpi_scan_lock); | |
2274 | return result; | |
1da177e4 | 2275 | } |