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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> |
643b8e4d | 10 | #include <linux/acpi_iort.h> |
74523c90 AK |
11 | #include <linux/signal.h> |
12 | #include <linux/kthread.h> | |
222e82ac | 13 | #include <linux/dmi.h> |
d1efe3c3 | 14 | #include <linux/nls.h> |
d0562674 | 15 | #include <linux/dma-mapping.h> |
1da177e4 | 16 | |
d783156e RW |
17 | #include <asm/pgtable.h> |
18 | ||
e60cc7a6 BH |
19 | #include "internal.h" |
20 | ||
1da177e4 | 21 | #define _COMPONENT ACPI_BUS_COMPONENT |
f52fd66d | 22 | ACPI_MODULE_NAME("scan"); |
4be44fcd | 23 | extern struct acpi_device *acpi_root; |
1da177e4 LT |
24 | |
25 | #define ACPI_BUS_CLASS "system_bus" | |
29b71a1c | 26 | #define ACPI_BUS_HID "LNXSYBUS" |
1da177e4 LT |
27 | #define ACPI_BUS_DEVICE_NAME "System Bus" |
28 | ||
859ac9a4 BH |
29 | #define ACPI_IS_ROOT_DEVICE(device) (!(device)->parent) |
30 | ||
d783156e RW |
31 | #define INVALID_ACPI_HANDLE ((acpi_handle)empty_zero_page) |
32 | ||
620e112c | 33 | static const char *dummy_hid = "device"; |
2b2ae7c7 | 34 | |
40e7fcb1 LT |
35 | static LIST_HEAD(acpi_dep_list); |
36 | static DEFINE_MUTEX(acpi_dep_list_lock); | |
2d12b6b3 | 37 | LIST_HEAD(acpi_bus_id_list); |
c511cc19 | 38 | static DEFINE_MUTEX(acpi_scan_lock); |
ca589f94 | 39 | static LIST_HEAD(acpi_scan_handlers_list); |
9090589d | 40 | DEFINE_MUTEX(acpi_device_lock); |
1da177e4 | 41 | LIST_HEAD(acpi_wakeup_device_list); |
e525506f | 42 | static DEFINE_MUTEX(acpi_hp_context_lock); |
1da177e4 | 43 | |
a4e081b0 SZ |
44 | /* |
45 | * The UART device described by the SPCR table is the only object which needs | |
46 | * special-casing. Everything else is covered by ACPI namespace paths in STAO | |
47 | * table. | |
48 | */ | |
49 | static u64 spcr_uart_addr; | |
50 | ||
40e7fcb1 LT |
51 | struct acpi_dep_data { |
52 | struct list_head node; | |
53 | acpi_handle master; | |
54 | acpi_handle slave; | |
55 | }; | |
56 | ||
3757b948 RW |
57 | void acpi_scan_lock_acquire(void) |
58 | { | |
59 | mutex_lock(&acpi_scan_lock); | |
60 | } | |
61 | EXPORT_SYMBOL_GPL(acpi_scan_lock_acquire); | |
62 | ||
63 | void acpi_scan_lock_release(void) | |
64 | { | |
65 | mutex_unlock(&acpi_scan_lock); | |
66 | } | |
67 | EXPORT_SYMBOL_GPL(acpi_scan_lock_release); | |
68 | ||
e525506f RW |
69 | void acpi_lock_hp_context(void) |
70 | { | |
71 | mutex_lock(&acpi_hp_context_lock); | |
72 | } | |
73 | ||
74 | void acpi_unlock_hp_context(void) | |
75 | { | |
76 | mutex_unlock(&acpi_hp_context_lock); | |
77 | } | |
78 | ||
5d513205 RW |
79 | void acpi_initialize_hp_context(struct acpi_device *adev, |
80 | struct acpi_hotplug_context *hp, | |
81 | int (*notify)(struct acpi_device *, u32), | |
82 | void (*uevent)(struct acpi_device *, u32)) | |
83 | { | |
84 | acpi_lock_hp_context(); | |
ba574dc8 RW |
85 | hp->notify = notify; |
86 | hp->uevent = uevent; | |
87 | acpi_set_hp_context(adev, hp); | |
5d513205 RW |
88 | acpi_unlock_hp_context(); |
89 | } | |
90 | EXPORT_SYMBOL_GPL(acpi_initialize_hp_context); | |
91 | ||
ca589f94 RW |
92 | int acpi_scan_add_handler(struct acpi_scan_handler *handler) |
93 | { | |
d34afa9d | 94 | if (!handler) |
ca589f94 RW |
95 | return -EINVAL; |
96 | ||
97 | list_add_tail(&handler->list_node, &acpi_scan_handlers_list); | |
98 | return 0; | |
99 | } | |
100 | ||
3f8055c3 RW |
101 | int acpi_scan_add_handler_with_hotplug(struct acpi_scan_handler *handler, |
102 | const char *hotplug_profile_name) | |
103 | { | |
104 | int error; | |
105 | ||
106 | error = acpi_scan_add_handler(handler); | |
107 | if (error) | |
108 | return error; | |
109 | ||
110 | acpi_sysfs_add_hotplug_profile(&handler->hotplug, hotplug_profile_name); | |
111 | return 0; | |
112 | } | |
113 | ||
caa73ea1 | 114 | bool acpi_scan_is_offline(struct acpi_device *adev, bool uevent) |
d22ddcbc RW |
115 | { |
116 | struct acpi_device_physical_node *pn; | |
117 | bool offline = true; | |
118 | ||
4c533c80 RW |
119 | /* |
120 | * acpi_container_offline() calls this for all of the container's | |
121 | * children under the container's physical_node_lock lock. | |
122 | */ | |
123 | mutex_lock_nested(&adev->physical_node_lock, SINGLE_DEPTH_NESTING); | |
d22ddcbc RW |
124 | |
125 | list_for_each_entry(pn, &adev->physical_node_list, node) | |
126 | if (device_supports_offline(pn->dev) && !pn->dev->offline) { | |
caa73ea1 RW |
127 | if (uevent) |
128 | kobject_uevent(&pn->dev->kobj, KOBJ_CHANGE); | |
129 | ||
d22ddcbc RW |
130 | offline = false; |
131 | break; | |
132 | } | |
133 | ||
134 | mutex_unlock(&adev->physical_node_lock); | |
135 | return offline; | |
136 | } | |
137 | ||
7f28ddec RW |
138 | static acpi_status acpi_bus_offline(acpi_handle handle, u32 lvl, void *data, |
139 | void **ret_p) | |
683058e3 RW |
140 | { |
141 | struct acpi_device *device = NULL; | |
142 | struct acpi_device_physical_node *pn; | |
303bfdb1 | 143 | bool second_pass = (bool)data; |
683058e3 RW |
144 | acpi_status status = AE_OK; |
145 | ||
146 | if (acpi_bus_get_device(handle, &device)) | |
147 | return AE_OK; | |
148 | ||
7f28ddec RW |
149 | if (device->handler && !device->handler->hotplug.enabled) { |
150 | *ret_p = &device->dev; | |
151 | return AE_SUPPORT; | |
152 | } | |
153 | ||
683058e3 RW |
154 | mutex_lock(&device->physical_node_lock); |
155 | ||
156 | list_for_each_entry(pn, &device->physical_node_list, node) { | |
157 | int ret; | |
158 | ||
303bfdb1 RW |
159 | if (second_pass) { |
160 | /* Skip devices offlined by the first pass. */ | |
161 | if (pn->put_online) | |
162 | continue; | |
163 | } else { | |
164 | pn->put_online = false; | |
165 | } | |
683058e3 | 166 | ret = device_offline(pn->dev); |
303bfdb1 RW |
167 | if (ret >= 0) { |
168 | pn->put_online = !ret; | |
169 | } else { | |
170 | *ret_p = pn->dev; | |
171 | if (second_pass) { | |
172 | status = AE_ERROR; | |
173 | break; | |
174 | } | |
683058e3 | 175 | } |
683058e3 RW |
176 | } |
177 | ||
178 | mutex_unlock(&device->physical_node_lock); | |
179 | ||
180 | return status; | |
181 | } | |
182 | ||
7f28ddec RW |
183 | static acpi_status acpi_bus_online(acpi_handle handle, u32 lvl, void *data, |
184 | void **ret_p) | |
683058e3 RW |
185 | { |
186 | struct acpi_device *device = NULL; | |
187 | struct acpi_device_physical_node *pn; | |
188 | ||
189 | if (acpi_bus_get_device(handle, &device)) | |
190 | return AE_OK; | |
191 | ||
192 | mutex_lock(&device->physical_node_lock); | |
193 | ||
194 | list_for_each_entry(pn, &device->physical_node_list, node) | |
195 | if (pn->put_online) { | |
196 | device_online(pn->dev); | |
197 | pn->put_online = false; | |
198 | } | |
199 | ||
200 | mutex_unlock(&device->physical_node_lock); | |
201 | ||
202 | return AE_OK; | |
203 | } | |
204 | ||
d22ddcbc | 205 | static int acpi_scan_try_to_offline(struct acpi_device *device) |
1da177e4 | 206 | { |
5993c467 | 207 | acpi_handle handle = device->handle; |
d22ddcbc | 208 | struct device *errdev = NULL; |
a33ec399 | 209 | acpi_status status; |
f058cdf4 | 210 | |
303bfdb1 RW |
211 | /* |
212 | * Carry out two passes here and ignore errors in the first pass, | |
213 | * because if the devices in question are memory blocks and | |
214 | * CONFIG_MEMCG is set, one of the blocks may hold data structures | |
215 | * that the other blocks depend on, but it is not known in advance which | |
216 | * block holds them. | |
217 | * | |
218 | * If the first pass is successful, the second one isn't needed, though. | |
219 | */ | |
7f28ddec RW |
220 | status = acpi_walk_namespace(ACPI_TYPE_ANY, handle, ACPI_UINT32_MAX, |
221 | NULL, acpi_bus_offline, (void *)false, | |
222 | (void **)&errdev); | |
223 | if (status == AE_SUPPORT) { | |
224 | dev_warn(errdev, "Offline disabled.\n"); | |
225 | acpi_walk_namespace(ACPI_TYPE_ANY, handle, ACPI_UINT32_MAX, | |
226 | acpi_bus_online, NULL, NULL, NULL); | |
7f28ddec RW |
227 | return -EPERM; |
228 | } | |
229 | acpi_bus_offline(handle, 0, (void *)false, (void **)&errdev); | |
303bfdb1 RW |
230 | if (errdev) { |
231 | errdev = NULL; | |
683058e3 | 232 | acpi_walk_namespace(ACPI_TYPE_ANY, handle, ACPI_UINT32_MAX, |
7f28ddec RW |
233 | NULL, acpi_bus_offline, (void *)true, |
234 | (void **)&errdev); | |
ffc10d82 | 235 | if (!errdev) |
7f28ddec RW |
236 | acpi_bus_offline(handle, 0, (void *)true, |
237 | (void **)&errdev); | |
303bfdb1 | 238 | |
ffc10d82 | 239 | if (errdev) { |
303bfdb1 | 240 | dev_warn(errdev, "Offline failed.\n"); |
7f28ddec | 241 | acpi_bus_online(handle, 0, NULL, NULL); |
303bfdb1 | 242 | acpi_walk_namespace(ACPI_TYPE_ANY, handle, |
7f28ddec RW |
243 | ACPI_UINT32_MAX, acpi_bus_online, |
244 | NULL, NULL, NULL); | |
303bfdb1 RW |
245 | return -EBUSY; |
246 | } | |
683058e3 | 247 | } |
d22ddcbc RW |
248 | return 0; |
249 | } | |
250 | ||
251 | static int acpi_scan_hot_remove(struct acpi_device *device) | |
252 | { | |
253 | acpi_handle handle = device->handle; | |
254 | unsigned long long sta; | |
255 | acpi_status status; | |
256 | ||
ffc10d82 | 257 | if (device->handler && device->handler->hotplug.demand_offline) { |
caa73ea1 | 258 | if (!acpi_scan_is_offline(device, true)) |
d22ddcbc RW |
259 | return -EBUSY; |
260 | } else { | |
261 | int error = acpi_scan_try_to_offline(device); | |
262 | if (error) | |
263 | return error; | |
264 | } | |
683058e3 | 265 | |
26d46867 | 266 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
0794469d | 267 | "Hot-removing device %s...\n", dev_name(&device->dev))); |
26d46867 | 268 | |
bfee26db | 269 | acpi_bus_trim(device); |
683058e3 | 270 | |
7d2421f8 | 271 | acpi_evaluate_lck(handle, 0); |
1da177e4 LT |
272 | /* |
273 | * TBD: _EJD support. | |
274 | */ | |
7d2421f8 JL |
275 | status = acpi_evaluate_ej0(handle); |
276 | if (status == AE_NOT_FOUND) | |
277 | return -ENODEV; | |
278 | else if (ACPI_FAILURE(status)) | |
279 | return -EIO; | |
1da177e4 | 280 | |
882fd12e TK |
281 | /* |
282 | * Verify if eject was indeed successful. If not, log an error | |
283 | * message. No need to call _OST since _EJ0 call was made OK. | |
284 | */ | |
285 | status = acpi_evaluate_integer(handle, "_STA", NULL, &sta); | |
286 | if (ACPI_FAILURE(status)) { | |
287 | acpi_handle_warn(handle, | |
288 | "Status check after eject failed (0x%x)\n", status); | |
289 | } else if (sta & ACPI_STA_DEVICE_ENABLED) { | |
290 | acpi_handle_warn(handle, | |
291 | "Eject incomplete - status 0x%llx\n", sta); | |
292 | } | |
293 | ||
a33ec399 RW |
294 | return 0; |
295 | } | |
1da177e4 | 296 | |
443fc820 RW |
297 | static int acpi_scan_device_not_present(struct acpi_device *adev) |
298 | { | |
299 | if (!acpi_device_enumerated(adev)) { | |
300 | dev_warn(&adev->dev, "Still not present\n"); | |
301 | return -EALREADY; | |
302 | } | |
303 | acpi_bus_trim(adev); | |
304 | return 0; | |
305 | } | |
306 | ||
c27b2c33 | 307 | static int acpi_scan_device_check(struct acpi_device *adev) |
a33ec399 | 308 | { |
f943db40 | 309 | int error; |
a33ec399 | 310 | |
443fc820 RW |
311 | acpi_bus_get_status(adev); |
312 | if (adev->status.present || adev->status.functional) { | |
313 | /* | |
314 | * This function is only called for device objects for which | |
315 | * matching scan handlers exist. The only situation in which | |
316 | * the scan handler is not attached to this device object yet | |
317 | * is when the device has just appeared (either it wasn't | |
318 | * present at all before or it was removed and then added | |
319 | * again). | |
320 | */ | |
321 | if (adev->handler) { | |
322 | dev_warn(&adev->dev, "Already enumerated\n"); | |
323 | return -EALREADY; | |
324 | } | |
325 | error = acpi_bus_scan(adev->handle); | |
326 | if (error) { | |
327 | dev_warn(&adev->dev, "Namespace scan failure\n"); | |
328 | return error; | |
329 | } | |
330 | if (!adev->handler) { | |
331 | dev_warn(&adev->dev, "Enumeration failure\n"); | |
332 | error = -ENODEV; | |
333 | } | |
334 | } else { | |
335 | error = acpi_scan_device_not_present(adev); | |
336 | } | |
337 | return error; | |
338 | } | |
339 | ||
340 | static int acpi_scan_bus_check(struct acpi_device *adev) | |
341 | { | |
342 | struct acpi_scan_handler *handler = adev->handler; | |
343 | struct acpi_device *child; | |
344 | int error; | |
345 | ||
346 | acpi_bus_get_status(adev); | |
347 | if (!(adev->status.present || adev->status.functional)) { | |
348 | acpi_scan_device_not_present(adev); | |
349 | return 0; | |
350 | } | |
351 | if (handler && handler->hotplug.scan_dependent) | |
352 | return handler->hotplug.scan_dependent(adev); | |
353 | ||
c27b2c33 RW |
354 | error = acpi_bus_scan(adev->handle); |
355 | if (error) { | |
356 | dev_warn(&adev->dev, "Namespace scan failure\n"); | |
357 | return error; | |
358 | } | |
443fc820 RW |
359 | list_for_each_entry(child, &adev->children, node) { |
360 | error = acpi_scan_bus_check(child); | |
361 | if (error) | |
362 | return error; | |
c27b2c33 RW |
363 | } |
364 | return 0; | |
a33ec399 RW |
365 | } |
366 | ||
3c2cc7ff RW |
367 | static int acpi_generic_hotplug_event(struct acpi_device *adev, u32 type) |
368 | { | |
369 | switch (type) { | |
370 | case ACPI_NOTIFY_BUS_CHECK: | |
371 | return acpi_scan_bus_check(adev); | |
372 | case ACPI_NOTIFY_DEVICE_CHECK: | |
373 | return acpi_scan_device_check(adev); | |
374 | case ACPI_NOTIFY_EJECT_REQUEST: | |
375 | case ACPI_OST_EC_OSPM_EJECT: | |
dd2151be RW |
376 | if (adev->handler && !adev->handler->hotplug.enabled) { |
377 | dev_info(&adev->dev, "Eject disabled\n"); | |
378 | return -EPERM; | |
379 | } | |
700b8422 RW |
380 | acpi_evaluate_ost(adev->handle, ACPI_NOTIFY_EJECT_REQUEST, |
381 | ACPI_OST_SC_EJECT_IN_PROGRESS, NULL); | |
3c2cc7ff RW |
382 | return acpi_scan_hot_remove(adev); |
383 | } | |
384 | return -EINVAL; | |
385 | } | |
386 | ||
1e3bcb59 | 387 | void acpi_device_hotplug(struct acpi_device *adev, u32 src) |
a33ec399 | 388 | { |
a33ec399 | 389 | u32 ost_code = ACPI_OST_SC_NON_SPECIFIC_FAILURE; |
3c2cc7ff | 390 | int error = -ENODEV; |
a33ec399 | 391 | |
683058e3 | 392 | lock_device_hotplug(); |
e0ae8fee | 393 | mutex_lock(&acpi_scan_lock); |
a33ec399 | 394 | |
c27b2c33 RW |
395 | /* |
396 | * The device object's ACPI handle cannot become invalid as long as we | |
3c2cc7ff | 397 | * are holding acpi_scan_lock, but it might have become invalid before |
c27b2c33 RW |
398 | * that lock was acquired. |
399 | */ | |
400 | if (adev->handle == INVALID_ACPI_HANDLE) | |
3c2cc7ff | 401 | goto err_out; |
c27b2c33 | 402 | |
1e2380cd RW |
403 | if (adev->flags.is_dock_station) { |
404 | error = dock_notify(adev, src); | |
405 | } else if (adev->flags.hotplug_notify) { | |
3c2cc7ff | 406 | error = acpi_generic_hotplug_event(adev, src); |
dd2151be RW |
407 | if (error == -EPERM) { |
408 | ost_code = ACPI_OST_SC_EJECT_NOT_SUPPORTED; | |
409 | goto err_out; | |
410 | } | |
3c2cc7ff | 411 | } else { |
be27b3dc | 412 | int (*notify)(struct acpi_device *, u32); |
3c2cc7ff RW |
413 | |
414 | acpi_lock_hp_context(); | |
be27b3dc | 415 | notify = adev->hp ? adev->hp->notify : NULL; |
3c2cc7ff RW |
416 | acpi_unlock_hp_context(); |
417 | /* | |
418 | * There may be additional notify handlers for device objects | |
419 | * without the .event() callback, so ignore them here. | |
420 | */ | |
be27b3dc RW |
421 | if (notify) |
422 | error = notify(adev, src); | |
3c2cc7ff RW |
423 | else |
424 | goto out; | |
a33ec399 | 425 | } |
c27b2c33 RW |
426 | if (!error) |
427 | ost_code = ACPI_OST_SC_SUCCESS; | |
a33ec399 | 428 | |
3c2cc7ff | 429 | err_out: |
700b8422 | 430 | acpi_evaluate_ost(adev->handle, src, ost_code, NULL); |
3c2cc7ff RW |
431 | |
432 | out: | |
78ea4639 | 433 | acpi_bus_put_acpi_device(adev); |
a33ec399 | 434 | mutex_unlock(&acpi_scan_lock); |
e0ae8fee | 435 | unlock_device_hotplug(); |
a33ec399 RW |
436 | } |
437 | ||
0b224527 RW |
438 | static void acpi_free_power_resources_lists(struct acpi_device *device) |
439 | { | |
440 | int i; | |
441 | ||
993cbe59 RW |
442 | if (device->wakeup.flags.valid) |
443 | acpi_power_resources_list_free(&device->wakeup.resources); | |
444 | ||
1b1f3e16 | 445 | if (!device->power.flags.power_resources) |
0b224527 RW |
446 | return; |
447 | ||
448 | for (i = ACPI_STATE_D0; i <= ACPI_STATE_D3_HOT; i++) { | |
449 | struct acpi_device_power_state *ps = &device->power.states[i]; | |
450 | acpi_power_resources_list_free(&ps->resources); | |
451 | } | |
7f47fa6c BH |
452 | } |
453 | ||
1890a97a | 454 | static void acpi_device_release(struct device *dev) |
1da177e4 | 455 | { |
1890a97a | 456 | struct acpi_device *acpi_dev = to_acpi_device(dev); |
1da177e4 | 457 | |
ffdcd955 | 458 | acpi_free_properties(acpi_dev); |
c0af4175 | 459 | acpi_free_pnp_ids(&acpi_dev->pnp); |
0b224527 | 460 | acpi_free_power_resources_lists(acpi_dev); |
1890a97a | 461 | kfree(acpi_dev); |
1da177e4 LT |
462 | } |
463 | ||
d783156e RW |
464 | static void acpi_device_del(struct acpi_device *device) |
465 | { | |
ca9dc8d4 LW |
466 | struct acpi_device_bus_id *acpi_device_bus_id; |
467 | ||
d783156e RW |
468 | mutex_lock(&acpi_device_lock); |
469 | if (device->parent) | |
470 | list_del(&device->node); | |
471 | ||
ca9dc8d4 LW |
472 | list_for_each_entry(acpi_device_bus_id, &acpi_bus_id_list, node) |
473 | if (!strcmp(acpi_device_bus_id->bus_id, | |
474 | acpi_device_hid(device))) { | |
475 | if (acpi_device_bus_id->instance_no > 0) | |
476 | acpi_device_bus_id->instance_no--; | |
477 | else { | |
478 | list_del(&acpi_device_bus_id->node); | |
479 | kfree(acpi_device_bus_id); | |
480 | } | |
481 | break; | |
482 | } | |
483 | ||
d783156e RW |
484 | list_del(&device->wakeup_list); |
485 | mutex_unlock(&acpi_device_lock); | |
486 | ||
487 | acpi_power_add_remove_device(device, false); | |
488 | acpi_device_remove_files(device); | |
489 | if (device->remove) | |
490 | device->remove(device); | |
491 | ||
492 | device_del(&device->dev); | |
493 | } | |
494 | ||
68bdb677 OP |
495 | static BLOCKING_NOTIFIER_HEAD(acpi_reconfig_chain); |
496 | ||
d783156e RW |
497 | static LIST_HEAD(acpi_device_del_list); |
498 | static DEFINE_MUTEX(acpi_device_del_lock); | |
499 | ||
500 | static void acpi_device_del_work_fn(struct work_struct *work_not_used) | |
501 | { | |
502 | for (;;) { | |
503 | struct acpi_device *adev; | |
504 | ||
505 | mutex_lock(&acpi_device_del_lock); | |
506 | ||
507 | if (list_empty(&acpi_device_del_list)) { | |
508 | mutex_unlock(&acpi_device_del_lock); | |
509 | break; | |
510 | } | |
511 | adev = list_first_entry(&acpi_device_del_list, | |
512 | struct acpi_device, del_list); | |
513 | list_del(&adev->del_list); | |
514 | ||
515 | mutex_unlock(&acpi_device_del_lock); | |
516 | ||
68bdb677 OP |
517 | blocking_notifier_call_chain(&acpi_reconfig_chain, |
518 | ACPI_RECONFIG_DEVICE_REMOVE, adev); | |
519 | ||
d783156e RW |
520 | acpi_device_del(adev); |
521 | /* | |
522 | * Drop references to all power resources that might have been | |
523 | * used by the device. | |
524 | */ | |
525 | acpi_power_transition(adev, ACPI_STATE_D3_COLD); | |
526 | put_device(&adev->dev); | |
527 | } | |
528 | } | |
529 | ||
530 | /** | |
531 | * acpi_scan_drop_device - Drop an ACPI device object. | |
532 | * @handle: Handle of an ACPI namespace node, not used. | |
533 | * @context: Address of the ACPI device object to drop. | |
534 | * | |
535 | * This is invoked by acpi_ns_delete_node() during the removal of the ACPI | |
536 | * namespace node the device object pointed to by @context is attached to. | |
537 | * | |
538 | * The unregistration is carried out asynchronously to avoid running | |
539 | * acpi_device_del() under the ACPICA's namespace mutex and the list is used to | |
540 | * ensure the correct ordering (the device objects must be unregistered in the | |
541 | * same order in which the corresponding namespace nodes are deleted). | |
542 | */ | |
543 | static void acpi_scan_drop_device(acpi_handle handle, void *context) | |
caf5c03f | 544 | { |
d783156e RW |
545 | static DECLARE_WORK(work, acpi_device_del_work_fn); |
546 | struct acpi_device *adev = context; | |
547 | ||
548 | mutex_lock(&acpi_device_del_lock); | |
549 | ||
550 | /* | |
551 | * Use the ACPI hotplug workqueue which is ordered, so this work item | |
552 | * won't run after any hotplug work items submitted subsequently. That | |
553 | * prevents attempts to register device objects identical to those being | |
554 | * deleted from happening concurrently (such attempts result from | |
555 | * hotplug events handled via the ACPI hotplug workqueue). It also will | |
556 | * run after all of the work items submitted previosuly, which helps | |
557 | * those work items to ensure that they are not accessing stale device | |
558 | * objects. | |
559 | */ | |
560 | if (list_empty(&acpi_device_del_list)) | |
561 | acpi_queue_hotplug_work(&work); | |
562 | ||
563 | list_add_tail(&adev->del_list, &acpi_device_del_list); | |
564 | /* Make acpi_ns_validate_handle() return NULL for this handle. */ | |
565 | adev->handle = INVALID_ACPI_HANDLE; | |
566 | ||
567 | mutex_unlock(&acpi_device_del_lock); | |
caf5c03f RW |
568 | } |
569 | ||
78ea4639 RW |
570 | static int acpi_get_device_data(acpi_handle handle, struct acpi_device **device, |
571 | void (*callback)(void *)) | |
caf5c03f RW |
572 | { |
573 | acpi_status status; | |
574 | ||
575 | if (!device) | |
576 | return -EINVAL; | |
577 | ||
78ea4639 RW |
578 | status = acpi_get_data_full(handle, acpi_scan_drop_device, |
579 | (void **)device, callback); | |
caf5c03f RW |
580 | if (ACPI_FAILURE(status) || !*device) { |
581 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "No context for object [%p]\n", | |
582 | handle)); | |
583 | return -ENODEV; | |
584 | } | |
585 | return 0; | |
586 | } | |
78ea4639 RW |
587 | |
588 | int acpi_bus_get_device(acpi_handle handle, struct acpi_device **device) | |
589 | { | |
590 | return acpi_get_device_data(handle, device, NULL); | |
591 | } | |
6585925b | 592 | EXPORT_SYMBOL(acpi_bus_get_device); |
caf5c03f | 593 | |
78ea4639 RW |
594 | static void get_acpi_device(void *dev) |
595 | { | |
596 | if (dev) | |
597 | get_device(&((struct acpi_device *)dev)->dev); | |
598 | } | |
599 | ||
600 | struct acpi_device *acpi_bus_get_acpi_device(acpi_handle handle) | |
601 | { | |
602 | struct acpi_device *adev = NULL; | |
603 | ||
604 | acpi_get_device_data(handle, &adev, get_acpi_device); | |
605 | return adev; | |
606 | } | |
607 | ||
608 | void acpi_bus_put_acpi_device(struct acpi_device *adev) | |
609 | { | |
610 | put_device(&adev->dev); | |
611 | } | |
612 | ||
cf860be6 RW |
613 | int acpi_device_add(struct acpi_device *device, |
614 | void (*release)(struct device *)) | |
1da177e4 | 615 | { |
4be44fcd | 616 | int result; |
e49bd2dd ZR |
617 | struct acpi_device_bus_id *acpi_device_bus_id, *new_bus_id; |
618 | int found = 0; | |
66b7ed40 | 619 | |
d43e167d RW |
620 | if (device->handle) { |
621 | acpi_status status; | |
622 | ||
d783156e | 623 | status = acpi_attach_data(device->handle, acpi_scan_drop_device, |
d43e167d RW |
624 | device); |
625 | if (ACPI_FAILURE(status)) { | |
626 | acpi_handle_err(device->handle, | |
627 | "Unable to attach device data\n"); | |
628 | return -ENODEV; | |
629 | } | |
630 | } | |
631 | ||
9e89dde2 ZR |
632 | /* |
633 | * Linkage | |
634 | * ------- | |
635 | * Link this device to its parent and siblings. | |
636 | */ | |
637 | INIT_LIST_HEAD(&device->children); | |
638 | INIT_LIST_HEAD(&device->node); | |
9e89dde2 | 639 | INIT_LIST_HEAD(&device->wakeup_list); |
1033f904 | 640 | INIT_LIST_HEAD(&device->physical_node_list); |
d783156e | 641 | INIT_LIST_HEAD(&device->del_list); |
1033f904 | 642 | mutex_init(&device->physical_node_lock); |
1da177e4 | 643 | |
e49bd2dd ZR |
644 | new_bus_id = kzalloc(sizeof(struct acpi_device_bus_id), GFP_KERNEL); |
645 | if (!new_bus_id) { | |
d43e167d RW |
646 | pr_err(PREFIX "Memory allocation error\n"); |
647 | result = -ENOMEM; | |
648 | goto err_detach; | |
1da177e4 | 649 | } |
e49bd2dd | 650 | |
9090589d | 651 | mutex_lock(&acpi_device_lock); |
e49bd2dd ZR |
652 | /* |
653 | * Find suitable bus_id and instance number in acpi_bus_id_list | |
654 | * If failed, create one and link it into acpi_bus_id_list | |
655 | */ | |
656 | list_for_each_entry(acpi_device_bus_id, &acpi_bus_id_list, node) { | |
1131b938 BH |
657 | if (!strcmp(acpi_device_bus_id->bus_id, |
658 | acpi_device_hid(device))) { | |
659 | acpi_device_bus_id->instance_no++; | |
e49bd2dd ZR |
660 | found = 1; |
661 | kfree(new_bus_id); | |
662 | break; | |
663 | } | |
1da177e4 | 664 | } |
0c526d96 | 665 | if (!found) { |
e49bd2dd | 666 | acpi_device_bus_id = new_bus_id; |
1131b938 | 667 | strcpy(acpi_device_bus_id->bus_id, acpi_device_hid(device)); |
e49bd2dd ZR |
668 | acpi_device_bus_id->instance_no = 0; |
669 | list_add_tail(&acpi_device_bus_id->node, &acpi_bus_id_list); | |
1da177e4 | 670 | } |
0794469d | 671 | dev_set_name(&device->dev, "%s:%02x", acpi_device_bus_id->bus_id, acpi_device_bus_id->instance_no); |
1da177e4 | 672 | |
33b57150 | 673 | if (device->parent) |
9e89dde2 | 674 | list_add_tail(&device->node, &device->parent->children); |
33b57150 | 675 | |
9e89dde2 ZR |
676 | if (device->wakeup.flags.valid) |
677 | list_add_tail(&device->wakeup_list, &acpi_wakeup_device_list); | |
9090589d | 678 | mutex_unlock(&acpi_device_lock); |
1da177e4 | 679 | |
1890a97a | 680 | if (device->parent) |
66b7ed40 | 681 | device->dev.parent = &device->parent->dev; |
1890a97a | 682 | device->dev.bus = &acpi_bus_type; |
82c7d5ef | 683 | device->dev.release = release; |
cf860be6 | 684 | result = device_add(&device->dev); |
0c526d96 | 685 | if (result) { |
8b12b922 | 686 | dev_err(&device->dev, "Error registering device\n"); |
d43e167d | 687 | goto err; |
1da177e4 | 688 | } |
1da177e4 | 689 | |
e49bd2dd | 690 | result = acpi_device_setup_files(device); |
0c526d96 | 691 | if (result) |
0794469d KS |
692 | printk(KERN_ERR PREFIX "Error creating sysfs interface for device %s\n", |
693 | dev_name(&device->dev)); | |
1da177e4 | 694 | |
1da177e4 | 695 | return 0; |
d43e167d RW |
696 | |
697 | err: | |
9090589d | 698 | mutex_lock(&acpi_device_lock); |
33b57150 | 699 | if (device->parent) |
e49bd2dd | 700 | list_del(&device->node); |
e49bd2dd | 701 | list_del(&device->wakeup_list); |
9090589d | 702 | mutex_unlock(&acpi_device_lock); |
d43e167d RW |
703 | |
704 | err_detach: | |
d783156e | 705 | acpi_detach_data(device->handle, acpi_scan_drop_device); |
e49bd2dd | 706 | return result; |
1da177e4 LT |
707 | } |
708 | ||
9e89dde2 ZR |
709 | /* -------------------------------------------------------------------------- |
710 | Device Enumeration | |
711 | -------------------------------------------------------------------------- */ | |
5c478f49 BH |
712 | static struct acpi_device *acpi_bus_get_parent(acpi_handle handle) |
713 | { | |
456de893 | 714 | struct acpi_device *device = NULL; |
5c478f49 | 715 | acpi_status status; |
5c478f49 BH |
716 | |
717 | /* | |
718 | * Fixed hardware devices do not appear in the namespace and do not | |
719 | * have handles, but we fabricate acpi_devices for them, so we have | |
720 | * to deal with them specially. | |
721 | */ | |
456de893 | 722 | if (!handle) |
5c478f49 BH |
723 | return acpi_root; |
724 | ||
725 | do { | |
726 | status = acpi_get_parent(handle, &handle); | |
5c478f49 | 727 | if (ACPI_FAILURE(status)) |
456de893 RW |
728 | return status == AE_NULL_ENTRY ? NULL : acpi_root; |
729 | } while (acpi_bus_get_device(handle, &device)); | |
730 | return device; | |
5c478f49 BH |
731 | } |
732 | ||
9e89dde2 ZR |
733 | acpi_status |
734 | acpi_bus_get_ejd(acpi_handle handle, acpi_handle *ejd) | |
735 | { | |
736 | acpi_status status; | |
737 | acpi_handle tmp; | |
738 | struct acpi_buffer buffer = {ACPI_ALLOCATE_BUFFER, NULL}; | |
739 | union acpi_object *obj; | |
740 | ||
741 | status = acpi_get_handle(handle, "_EJD", &tmp); | |
742 | if (ACPI_FAILURE(status)) | |
743 | return status; | |
744 | ||
745 | status = acpi_evaluate_object(handle, "_EJD", NULL, &buffer); | |
746 | if (ACPI_SUCCESS(status)) { | |
747 | obj = buffer.pointer; | |
3b5fee59 HM |
748 | status = acpi_get_handle(ACPI_ROOT_OBJECT, obj->string.pointer, |
749 | ejd); | |
9e89dde2 ZR |
750 | kfree(buffer.pointer); |
751 | } | |
752 | return status; | |
753 | } | |
754 | EXPORT_SYMBOL_GPL(acpi_bus_get_ejd); | |
755 | ||
e88c9c60 RW |
756 | static int acpi_bus_extract_wakeup_device_power_package(acpi_handle handle, |
757 | struct acpi_device_wakeup *wakeup) | |
9e89dde2 | 758 | { |
b581a7f9 RW |
759 | struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; |
760 | union acpi_object *package = NULL; | |
9e89dde2 | 761 | union acpi_object *element = NULL; |
b581a7f9 | 762 | acpi_status status; |
e88c9c60 | 763 | int err = -ENODATA; |
9e89dde2 | 764 | |
b581a7f9 | 765 | if (!wakeup) |
e88c9c60 | 766 | return -EINVAL; |
9e89dde2 | 767 | |
993cbe59 | 768 | INIT_LIST_HEAD(&wakeup->resources); |
9e89dde2 | 769 | |
b581a7f9 RW |
770 | /* _PRW */ |
771 | status = acpi_evaluate_object(handle, "_PRW", NULL, &buffer); | |
772 | if (ACPI_FAILURE(status)) { | |
773 | ACPI_EXCEPTION((AE_INFO, status, "Evaluating _PRW")); | |
e88c9c60 | 774 | return err; |
b581a7f9 RW |
775 | } |
776 | ||
777 | package = (union acpi_object *)buffer.pointer; | |
778 | ||
e88c9c60 | 779 | if (!package || package->package.count < 2) |
b581a7f9 | 780 | goto out; |
b581a7f9 | 781 | |
9e89dde2 | 782 | element = &(package->package.elements[0]); |
e88c9c60 | 783 | if (!element) |
b581a7f9 | 784 | goto out; |
e88c9c60 | 785 | |
9e89dde2 ZR |
786 | if (element->type == ACPI_TYPE_PACKAGE) { |
787 | if ((element->package.count < 2) || | |
788 | (element->package.elements[0].type != | |
789 | ACPI_TYPE_LOCAL_REFERENCE) | |
e88c9c60 | 790 | || (element->package.elements[1].type != ACPI_TYPE_INTEGER)) |
b581a7f9 | 791 | goto out; |
e88c9c60 | 792 | |
b581a7f9 | 793 | wakeup->gpe_device = |
9e89dde2 | 794 | element->package.elements[0].reference.handle; |
b581a7f9 | 795 | wakeup->gpe_number = |
9e89dde2 ZR |
796 | (u32) element->package.elements[1].integer.value; |
797 | } else if (element->type == ACPI_TYPE_INTEGER) { | |
b581a7f9 RW |
798 | wakeup->gpe_device = NULL; |
799 | wakeup->gpe_number = element->integer.value; | |
800 | } else { | |
b581a7f9 RW |
801 | goto out; |
802 | } | |
9e89dde2 ZR |
803 | |
804 | element = &(package->package.elements[1]); | |
e88c9c60 | 805 | if (element->type != ACPI_TYPE_INTEGER) |
b581a7f9 | 806 | goto out; |
e88c9c60 | 807 | |
b581a7f9 | 808 | wakeup->sleep_state = element->integer.value; |
9e89dde2 | 809 | |
e88c9c60 RW |
810 | err = acpi_extract_power_resources(package, 2, &wakeup->resources); |
811 | if (err) | |
b581a7f9 | 812 | goto out; |
9e89dde2 | 813 | |
0596a52b RW |
814 | if (!list_empty(&wakeup->resources)) { |
815 | int sleep_state; | |
9e89dde2 | 816 | |
b5d667eb RW |
817 | err = acpi_power_wakeup_list_init(&wakeup->resources, |
818 | &sleep_state); | |
819 | if (err) { | |
820 | acpi_handle_warn(handle, "Retrieving current states " | |
821 | "of wakeup power resources failed\n"); | |
822 | acpi_power_resources_list_free(&wakeup->resources); | |
823 | goto out; | |
824 | } | |
0596a52b RW |
825 | if (sleep_state < wakeup->sleep_state) { |
826 | acpi_handle_warn(handle, "Overriding _PRW sleep state " | |
827 | "(S%d) by S%d from power resources\n", | |
828 | (int)wakeup->sleep_state, sleep_state); | |
829 | wakeup->sleep_state = sleep_state; | |
830 | } | |
831 | } | |
9874647b | 832 | |
b581a7f9 RW |
833 | out: |
834 | kfree(buffer.pointer); | |
e88c9c60 | 835 | return err; |
1da177e4 LT |
836 | } |
837 | ||
bd9b2f9a | 838 | static void acpi_wakeup_gpe_init(struct acpi_device *device) |
1da177e4 | 839 | { |
0519ade7 | 840 | static const struct acpi_device_id button_device_ids[] = { |
29b71a1c | 841 | {"PNP0C0C", 0}, |
b7e38304 | 842 | {"PNP0C0D", 0}, |
29b71a1c TR |
843 | {"PNP0C0E", 0}, |
844 | {"", 0}, | |
845 | }; | |
bd9b2f9a | 846 | struct acpi_device_wakeup *wakeup = &device->wakeup; |
f517709d RW |
847 | acpi_status status; |
848 | acpi_event_status event_status; | |
849 | ||
bd9b2f9a | 850 | wakeup->flags.notifier_present = 0; |
f517709d RW |
851 | |
852 | /* Power button, Lid switch always enable wakeup */ | |
853 | if (!acpi_match_device_ids(device, button_device_ids)) { | |
bd9b2f9a | 854 | wakeup->flags.run_wake = 1; |
b7e38304 ZR |
855 | if (!acpi_match_device_ids(device, &button_device_ids[1])) { |
856 | /* Do not use Lid/sleep button for S5 wakeup */ | |
bd9b2f9a RW |
857 | if (wakeup->sleep_state == ACPI_STATE_S5) |
858 | wakeup->sleep_state = ACPI_STATE_S4; | |
b7e38304 | 859 | } |
bd9b2f9a | 860 | acpi_mark_gpe_for_wake(wakeup->gpe_device, wakeup->gpe_number); |
f2b56bc8 | 861 | device_set_wakeup_capable(&device->dev, true); |
f517709d RW |
862 | return; |
863 | } | |
864 | ||
bd9b2f9a RW |
865 | acpi_setup_gpe_for_wake(device->handle, wakeup->gpe_device, |
866 | wakeup->gpe_number); | |
867 | status = acpi_get_gpe_status(wakeup->gpe_device, wakeup->gpe_number, | |
868 | &event_status); | |
869 | if (ACPI_FAILURE(status)) | |
870 | return; | |
871 | ||
2f857234 | 872 | wakeup->flags.run_wake = !!(event_status & ACPI_EVENT_FLAG_HAS_HANDLER); |
f517709d RW |
873 | } |
874 | ||
d57d09a4 | 875 | static void acpi_bus_get_wakeup_device_flags(struct acpi_device *device) |
f517709d | 876 | { |
e88c9c60 | 877 | int err; |
29b71a1c | 878 | |
d57d09a4 | 879 | /* Presence of _PRW indicates wake capable */ |
952c63e9 | 880 | if (!acpi_has_method(device->handle, "_PRW")) |
d57d09a4 RW |
881 | return; |
882 | ||
e88c9c60 RW |
883 | err = acpi_bus_extract_wakeup_device_power_package(device->handle, |
884 | &device->wakeup); | |
885 | if (err) { | |
886 | dev_err(&device->dev, "_PRW evaluation error: %d\n", err); | |
d57d09a4 | 887 | return; |
9e89dde2 | 888 | } |
1da177e4 | 889 | |
9e89dde2 | 890 | device->wakeup.flags.valid = 1; |
9b83ccd2 | 891 | device->wakeup.prepare_count = 0; |
bd9b2f9a | 892 | acpi_wakeup_gpe_init(device); |
729b2bdb ZY |
893 | /* Call _PSW/_DSW object to disable its ability to wake the sleeping |
894 | * system for the ACPI device with the _PRW object. | |
895 | * The _PSW object is depreciated in ACPI 3.0 and is replaced by _DSW. | |
896 | * So it is necessary to call _DSW object first. Only when it is not | |
897 | * present will the _PSW object used. | |
898 | */ | |
e88c9c60 RW |
899 | err = acpi_device_sleep_wake(device, 0, 0, 0); |
900 | if (err) | |
77e76609 RW |
901 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
902 | "error in _DSW or _PSW evaluation\n")); | |
1da177e4 | 903 | } |
1da177e4 | 904 | |
f33ce568 RW |
905 | static void acpi_bus_init_power_state(struct acpi_device *device, int state) |
906 | { | |
907 | struct acpi_device_power_state *ps = &device->power.states[state]; | |
ef85bdbe RW |
908 | char pathname[5] = { '_', 'P', 'R', '0' + state, '\0' }; |
909 | struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; | |
f33ce568 | 910 | acpi_status status; |
bf325f95 | 911 | |
f33ce568 RW |
912 | INIT_LIST_HEAD(&ps->resources); |
913 | ||
ef85bdbe RW |
914 | /* Evaluate "_PRx" to get referenced power resources */ |
915 | status = acpi_evaluate_object(device->handle, pathname, NULL, &buffer); | |
916 | if (ACPI_SUCCESS(status)) { | |
917 | union acpi_object *package = buffer.pointer; | |
918 | ||
919 | if (buffer.length && package | |
920 | && package->type == ACPI_TYPE_PACKAGE | |
921 | && package->package.count) { | |
e88c9c60 RW |
922 | int err = acpi_extract_power_resources(package, 0, |
923 | &ps->resources); | |
924 | if (!err) | |
ef85bdbe | 925 | device->power.flags.power_resources = 1; |
f33ce568 | 926 | } |
ef85bdbe | 927 | ACPI_FREE(buffer.pointer); |
f33ce568 RW |
928 | } |
929 | ||
930 | /* Evaluate "_PSx" to see if we can do explicit sets */ | |
ef85bdbe | 931 | pathname[2] = 'S'; |
952c63e9 | 932 | if (acpi_has_method(device->handle, pathname)) |
f33ce568 RW |
933 | ps->flags.explicit_set = 1; |
934 | ||
20dacb71 RW |
935 | /* State is valid if there are means to put the device into it. */ |
936 | if (!list_empty(&ps->resources) || ps->flags.explicit_set) | |
f33ce568 | 937 | ps->flags.valid = 1; |
f33ce568 RW |
938 | |
939 | ps->power = -1; /* Unknown - driver assigned */ | |
940 | ps->latency = -1; /* Unknown - driver assigned */ | |
941 | } | |
942 | ||
d43e167d | 943 | static void acpi_bus_get_power_flags(struct acpi_device *device) |
1da177e4 | 944 | { |
8bc5053b | 945 | u32 i; |
1a365616 | 946 | |
d43e167d | 947 | /* Presence of _PS0|_PR0 indicates 'power manageable' */ |
952c63e9 JL |
948 | if (!acpi_has_method(device->handle, "_PS0") && |
949 | !acpi_has_method(device->handle, "_PR0")) | |
950 | return; | |
1a365616 | 951 | |
d43e167d | 952 | device->flags.power_manageable = 1; |
4be44fcd | 953 | |
9e89dde2 ZR |
954 | /* |
955 | * Power Management Flags | |
956 | */ | |
952c63e9 | 957 | if (acpi_has_method(device->handle, "_PSC")) |
9e89dde2 | 958 | device->power.flags.explicit_get = 1; |
f25c0ae2 | 959 | |
952c63e9 | 960 | if (acpi_has_method(device->handle, "_IRC")) |
9e89dde2 | 961 | device->power.flags.inrush_current = 1; |
1da177e4 | 962 | |
f25c0ae2 RW |
963 | if (acpi_has_method(device->handle, "_DSW")) |
964 | device->power.flags.dsw_present = 1; | |
965 | ||
9e89dde2 ZR |
966 | /* |
967 | * Enumerate supported power management states | |
968 | */ | |
f33ce568 RW |
969 | for (i = ACPI_STATE_D0; i <= ACPI_STATE_D3_HOT; i++) |
970 | acpi_bus_init_power_state(device, i); | |
bf325f95 | 971 | |
0b224527 | 972 | INIT_LIST_HEAD(&device->power.states[ACPI_STATE_D3_COLD].resources); |
20dacb71 RW |
973 | if (!list_empty(&device->power.states[ACPI_STATE_D3_HOT].resources)) |
974 | device->power.states[ACPI_STATE_D3_COLD].flags.valid = 1; | |
1da177e4 | 975 | |
20dacb71 | 976 | /* Set defaults for D0 and D3hot states (always valid) */ |
9e89dde2 ZR |
977 | device->power.states[ACPI_STATE_D0].flags.valid = 1; |
978 | device->power.states[ACPI_STATE_D0].power = 100; | |
20dacb71 | 979 | device->power.states[ACPI_STATE_D3_HOT].flags.valid = 1; |
1399dfcd | 980 | |
1b1f3e16 | 981 | if (acpi_bus_init_power(device)) |
b3785492 | 982 | device->flags.power_manageable = 0; |
9e89dde2 | 983 | } |
c8f7a62c | 984 | |
d43e167d | 985 | static void acpi_bus_get_flags(struct acpi_device *device) |
1da177e4 | 986 | { |
1da177e4 | 987 | /* Presence of _STA indicates 'dynamic_status' */ |
952c63e9 | 988 | if (acpi_has_method(device->handle, "_STA")) |
1da177e4 LT |
989 | device->flags.dynamic_status = 1; |
990 | ||
1da177e4 | 991 | /* Presence of _RMV indicates 'removable' */ |
952c63e9 | 992 | if (acpi_has_method(device->handle, "_RMV")) |
1da177e4 LT |
993 | device->flags.removable = 1; |
994 | ||
995 | /* Presence of _EJD|_EJ0 indicates 'ejectable' */ | |
952c63e9 JL |
996 | if (acpi_has_method(device->handle, "_EJD") || |
997 | acpi_has_method(device->handle, "_EJ0")) | |
1da177e4 | 998 | device->flags.ejectable = 1; |
1da177e4 LT |
999 | } |
1000 | ||
c7bcb4e9 | 1001 | static void acpi_device_get_busid(struct acpi_device *device) |
1da177e4 | 1002 | { |
4be44fcd LB |
1003 | char bus_id[5] = { '?', 0 }; |
1004 | struct acpi_buffer buffer = { sizeof(bus_id), bus_id }; | |
1005 | int i = 0; | |
1da177e4 LT |
1006 | |
1007 | /* | |
1008 | * Bus ID | |
1009 | * ------ | |
1010 | * The device's Bus ID is simply the object name. | |
1011 | * TBD: Shouldn't this value be unique (within the ACPI namespace)? | |
1012 | */ | |
859ac9a4 | 1013 | if (ACPI_IS_ROOT_DEVICE(device)) { |
1da177e4 | 1014 | strcpy(device->pnp.bus_id, "ACPI"); |
859ac9a4 BH |
1015 | return; |
1016 | } | |
1017 | ||
1018 | switch (device->device_type) { | |
1da177e4 LT |
1019 | case ACPI_BUS_TYPE_POWER_BUTTON: |
1020 | strcpy(device->pnp.bus_id, "PWRF"); | |
1021 | break; | |
1022 | case ACPI_BUS_TYPE_SLEEP_BUTTON: | |
1023 | strcpy(device->pnp.bus_id, "SLPF"); | |
1024 | break; | |
1025 | default: | |
66b7ed40 | 1026 | acpi_get_name(device->handle, ACPI_SINGLE_NAME, &buffer); |
1da177e4 LT |
1027 | /* Clean up trailing underscores (if any) */ |
1028 | for (i = 3; i > 1; i--) { | |
1029 | if (bus_id[i] == '_') | |
1030 | bus_id[i] = '\0'; | |
1031 | else | |
1032 | break; | |
1033 | } | |
1034 | strcpy(device->pnp.bus_id, bus_id); | |
1035 | break; | |
1036 | } | |
1037 | } | |
1038 | ||
ebf4df8d JL |
1039 | /* |
1040 | * acpi_ata_match - see if an acpi object is an ATA device | |
1041 | * | |
1042 | * If an acpi object has one of the ACPI ATA methods defined, | |
1043 | * then we can safely call it an ATA device. | |
1044 | */ | |
1045 | bool acpi_ata_match(acpi_handle handle) | |
1046 | { | |
1047 | return acpi_has_method(handle, "_GTF") || | |
1048 | acpi_has_method(handle, "_GTM") || | |
1049 | acpi_has_method(handle, "_STM") || | |
1050 | acpi_has_method(handle, "_SDD"); | |
1051 | } | |
1052 | ||
54735266 | 1053 | /* |
d4e1a692 | 1054 | * acpi_bay_match - see if an acpi object is an ejectable driver bay |
54735266 ZR |
1055 | * |
1056 | * If an acpi object is ejectable and has one of the ACPI ATA methods defined, | |
1057 | * then we can safely call it an ejectable drive bay | |
1058 | */ | |
ebf4df8d | 1059 | bool acpi_bay_match(acpi_handle handle) |
d4e1a692 | 1060 | { |
54735266 ZR |
1061 | acpi_handle phandle; |
1062 | ||
952c63e9 | 1063 | if (!acpi_has_method(handle, "_EJ0")) |
ebf4df8d JL |
1064 | return false; |
1065 | if (acpi_ata_match(handle)) | |
1066 | return true; | |
1067 | if (ACPI_FAILURE(acpi_get_parent(handle, &phandle))) | |
1068 | return false; | |
54735266 | 1069 | |
ebf4df8d | 1070 | return acpi_ata_match(phandle); |
54735266 ZR |
1071 | } |
1072 | ||
b43109fa | 1073 | bool acpi_device_is_battery(struct acpi_device *adev) |
1e2380cd | 1074 | { |
b43109fa | 1075 | struct acpi_hardware_id *hwid; |
1e2380cd | 1076 | |
b43109fa RW |
1077 | list_for_each_entry(hwid, &adev->pnp.ids, list) |
1078 | if (!strcmp("PNP0C0A", hwid->id)) | |
1079 | return true; | |
1e2380cd | 1080 | |
b43109fa | 1081 | return false; |
1e2380cd RW |
1082 | } |
1083 | ||
b43109fa | 1084 | static bool is_ejectable_bay(struct acpi_device *adev) |
1e2380cd | 1085 | { |
b43109fa RW |
1086 | acpi_handle handle = adev->handle; |
1087 | ||
1088 | if (acpi_has_method(handle, "_EJ0") && acpi_device_is_battery(adev)) | |
1e2380cd RW |
1089 | return true; |
1090 | ||
1091 | return acpi_bay_match(handle); | |
1092 | } | |
1093 | ||
3620f2f2 | 1094 | /* |
d4e1a692 | 1095 | * acpi_dock_match - see if an acpi object has a _DCK method |
3620f2f2 | 1096 | */ |
ebf4df8d | 1097 | bool acpi_dock_match(acpi_handle handle) |
3620f2f2 | 1098 | { |
ebf4df8d | 1099 | return acpi_has_method(handle, "_DCK"); |
3620f2f2 FS |
1100 | } |
1101 | ||
adc8bb8e HG |
1102 | static acpi_status |
1103 | acpi_backlight_cap_match(acpi_handle handle, u32 level, void *context, | |
1104 | void **return_value) | |
1105 | { | |
1106 | long *cap = context; | |
1107 | ||
1108 | if (acpi_has_method(handle, "_BCM") && | |
1109 | acpi_has_method(handle, "_BCL")) { | |
1110 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Found generic backlight " | |
1111 | "support\n")); | |
1112 | *cap |= ACPI_VIDEO_BACKLIGHT; | |
adc8bb8e HG |
1113 | /* We have backlight support, no need to scan further */ |
1114 | return AE_CTRL_TERMINATE; | |
1115 | } | |
1116 | return 0; | |
1117 | } | |
1118 | ||
1119 | /* Returns true if the ACPI object is a video device which can be | |
1120 | * handled by video.ko. | |
1121 | * The device will get a Linux specific CID added in scan.c to | |
1122 | * identify the device as an ACPI graphics device | |
1123 | * Be aware that the graphics device may not be physically present | |
1124 | * Use acpi_video_get_capabilities() to detect general ACPI video | |
1125 | * capabilities of present cards | |
1126 | */ | |
1127 | long acpi_is_video_device(acpi_handle handle) | |
1128 | { | |
1129 | long video_caps = 0; | |
1130 | ||
1131 | /* Is this device able to support video switching ? */ | |
1132 | if (acpi_has_method(handle, "_DOD") || acpi_has_method(handle, "_DOS")) | |
1133 | video_caps |= ACPI_VIDEO_OUTPUT_SWITCHING; | |
1134 | ||
1135 | /* Is this device able to retrieve a video ROM ? */ | |
1136 | if (acpi_has_method(handle, "_ROM")) | |
1137 | video_caps |= ACPI_VIDEO_ROM_AVAILABLE; | |
1138 | ||
1139 | /* Is this device able to configure which video head to be POSTed ? */ | |
1140 | if (acpi_has_method(handle, "_VPO") && | |
1141 | acpi_has_method(handle, "_GPD") && | |
1142 | acpi_has_method(handle, "_SPD")) | |
1143 | video_caps |= ACPI_VIDEO_DEVICE_POSTING; | |
1144 | ||
1145 | /* Only check for backlight functionality if one of the above hit. */ | |
1146 | if (video_caps) | |
1147 | acpi_walk_namespace(ACPI_TYPE_DEVICE, handle, | |
1148 | ACPI_UINT32_MAX, acpi_backlight_cap_match, NULL, | |
1149 | &video_caps, NULL); | |
1150 | ||
1151 | return video_caps; | |
1152 | } | |
1153 | EXPORT_SYMBOL(acpi_is_video_device); | |
1154 | ||
620e112c | 1155 | const char *acpi_device_hid(struct acpi_device *device) |
15b8dd53 | 1156 | { |
7f47fa6c | 1157 | struct acpi_hardware_id *hid; |
15b8dd53 | 1158 | |
2b2ae7c7 TR |
1159 | if (list_empty(&device->pnp.ids)) |
1160 | return dummy_hid; | |
1161 | ||
7f47fa6c BH |
1162 | hid = list_first_entry(&device->pnp.ids, struct acpi_hardware_id, list); |
1163 | return hid->id; | |
1164 | } | |
1165 | EXPORT_SYMBOL(acpi_device_hid); | |
15b8dd53 | 1166 | |
d4e1a692 | 1167 | static void acpi_add_id(struct acpi_device_pnp *pnp, const char *dev_id) |
7f47fa6c BH |
1168 | { |
1169 | struct acpi_hardware_id *id; | |
15b8dd53 | 1170 | |
7f47fa6c BH |
1171 | id = kmalloc(sizeof(*id), GFP_KERNEL); |
1172 | if (!id) | |
1173 | return; | |
15b8dd53 | 1174 | |
6a0d12ef | 1175 | id->id = kstrdup_const(dev_id, GFP_KERNEL); |
7f47fa6c BH |
1176 | if (!id->id) { |
1177 | kfree(id); | |
1178 | return; | |
15b8dd53 BM |
1179 | } |
1180 | ||
d4e1a692 TK |
1181 | list_add_tail(&id->list, &pnp->ids); |
1182 | pnp->type.hardware_id = 1; | |
15b8dd53 BM |
1183 | } |
1184 | ||
222e82ac DW |
1185 | /* |
1186 | * Old IBM workstations have a DSDT bug wherein the SMBus object | |
1187 | * lacks the SMBUS01 HID and the methods do not have the necessary "_" | |
1188 | * prefix. Work around this. | |
1189 | */ | |
ebf4df8d | 1190 | static bool acpi_ibm_smbus_match(acpi_handle handle) |
222e82ac | 1191 | { |
ebf4df8d JL |
1192 | char node_name[ACPI_PATH_SEGMENT_LENGTH]; |
1193 | struct acpi_buffer path = { sizeof(node_name), node_name }; | |
222e82ac DW |
1194 | |
1195 | if (!dmi_name_in_vendors("IBM")) | |
ebf4df8d | 1196 | return false; |
222e82ac DW |
1197 | |
1198 | /* Look for SMBS object */ | |
ebf4df8d JL |
1199 | if (ACPI_FAILURE(acpi_get_name(handle, ACPI_SINGLE_NAME, &path)) || |
1200 | strcmp("SMBS", path.pointer)) | |
1201 | return false; | |
222e82ac DW |
1202 | |
1203 | /* Does it have the necessary (but misnamed) methods? */ | |
952c63e9 JL |
1204 | if (acpi_has_method(handle, "SBI") && |
1205 | acpi_has_method(handle, "SBR") && | |
1206 | acpi_has_method(handle, "SBW")) | |
ebf4df8d JL |
1207 | return true; |
1208 | ||
1209 | return false; | |
222e82ac DW |
1210 | } |
1211 | ||
ae3caa80 JL |
1212 | static bool acpi_object_is_system_bus(acpi_handle handle) |
1213 | { | |
1214 | acpi_handle tmp; | |
1215 | ||
1216 | if (ACPI_SUCCESS(acpi_get_handle(NULL, "\\_SB", &tmp)) && | |
1217 | tmp == handle) | |
1218 | return true; | |
1219 | if (ACPI_SUCCESS(acpi_get_handle(NULL, "\\_TZ", &tmp)) && | |
1220 | tmp == handle) | |
1221 | return true; | |
1222 | ||
1223 | return false; | |
1224 | } | |
1225 | ||
c0af4175 TK |
1226 | static void acpi_set_pnp_ids(acpi_handle handle, struct acpi_device_pnp *pnp, |
1227 | int device_type) | |
1da177e4 | 1228 | { |
4be44fcd | 1229 | acpi_status status; |
57f3674f | 1230 | struct acpi_device_info *info; |
78e25fef | 1231 | struct acpi_pnp_device_id_list *cid_list; |
7f47fa6c | 1232 | int i; |
1da177e4 | 1233 | |
c0af4175 | 1234 | switch (device_type) { |
1da177e4 | 1235 | case ACPI_BUS_TYPE_DEVICE: |
c0af4175 TK |
1236 | if (handle == ACPI_ROOT_OBJECT) { |
1237 | acpi_add_id(pnp, ACPI_SYSTEM_HID); | |
859ac9a4 BH |
1238 | break; |
1239 | } | |
1240 | ||
c0af4175 | 1241 | status = acpi_get_object_info(handle, &info); |
1da177e4 | 1242 | if (ACPI_FAILURE(status)) { |
c0af4175 TK |
1243 | pr_err(PREFIX "%s: Error reading device info\n", |
1244 | __func__); | |
1da177e4 LT |
1245 | return; |
1246 | } | |
1247 | ||
549e6845 | 1248 | if (info->valid & ACPI_VALID_HID) { |
c0af4175 | 1249 | acpi_add_id(pnp, info->hardware_id.string); |
549e6845 RW |
1250 | pnp->type.platform_id = 1; |
1251 | } | |
57f3674f | 1252 | if (info->valid & ACPI_VALID_CID) { |
15b8dd53 | 1253 | cid_list = &info->compatible_id_list; |
57f3674f | 1254 | for (i = 0; i < cid_list->count; i++) |
c0af4175 | 1255 | acpi_add_id(pnp, cid_list->ids[i].string); |
57f3674f | 1256 | } |
1da177e4 | 1257 | if (info->valid & ACPI_VALID_ADR) { |
c0af4175 TK |
1258 | pnp->bus_address = info->address; |
1259 | pnp->type.bus_address = 1; | |
1da177e4 | 1260 | } |
ccf78040 | 1261 | if (info->valid & ACPI_VALID_UID) |
c0af4175 | 1262 | pnp->unique_id = kstrdup(info->unique_id.string, |
ccf78040 | 1263 | GFP_KERNEL); |
26095a01 SS |
1264 | if (info->valid & ACPI_VALID_CLS) |
1265 | acpi_add_id(pnp, info->class_code.string); | |
ae843332 | 1266 | |
a83893ae BH |
1267 | kfree(info); |
1268 | ||
57f3674f BH |
1269 | /* |
1270 | * Some devices don't reliably have _HIDs & _CIDs, so add | |
1271 | * synthetic HIDs to make sure drivers can find them. | |
1272 | */ | |
c0af4175 TK |
1273 | if (acpi_is_video_device(handle)) |
1274 | acpi_add_id(pnp, ACPI_VIDEO_HID); | |
ebf4df8d | 1275 | else if (acpi_bay_match(handle)) |
c0af4175 | 1276 | acpi_add_id(pnp, ACPI_BAY_HID); |
ebf4df8d | 1277 | else if (acpi_dock_match(handle)) |
c0af4175 | 1278 | acpi_add_id(pnp, ACPI_DOCK_HID); |
ebf4df8d | 1279 | else if (acpi_ibm_smbus_match(handle)) |
c0af4175 | 1280 | acpi_add_id(pnp, ACPI_SMBUS_IBM_HID); |
ae3caa80 JL |
1281 | else if (list_empty(&pnp->ids) && |
1282 | acpi_object_is_system_bus(handle)) { | |
1283 | /* \_SB, \_TZ, LNXSYBUS */ | |
1284 | acpi_add_id(pnp, ACPI_BUS_HID); | |
c0af4175 TK |
1285 | strcpy(pnp->device_name, ACPI_BUS_DEVICE_NAME); |
1286 | strcpy(pnp->device_class, ACPI_BUS_CLASS); | |
b7b30de5 | 1287 | } |
54735266 | 1288 | |
1da177e4 LT |
1289 | break; |
1290 | case ACPI_BUS_TYPE_POWER: | |
c0af4175 | 1291 | acpi_add_id(pnp, ACPI_POWER_HID); |
1da177e4 LT |
1292 | break; |
1293 | case ACPI_BUS_TYPE_PROCESSOR: | |
c0af4175 | 1294 | acpi_add_id(pnp, ACPI_PROCESSOR_OBJECT_HID); |
1da177e4 | 1295 | break; |
1da177e4 | 1296 | case ACPI_BUS_TYPE_THERMAL: |
c0af4175 | 1297 | acpi_add_id(pnp, ACPI_THERMAL_HID); |
1da177e4 LT |
1298 | break; |
1299 | case ACPI_BUS_TYPE_POWER_BUTTON: | |
c0af4175 | 1300 | acpi_add_id(pnp, ACPI_BUTTON_HID_POWERF); |
1da177e4 LT |
1301 | break; |
1302 | case ACPI_BUS_TYPE_SLEEP_BUTTON: | |
c0af4175 | 1303 | acpi_add_id(pnp, ACPI_BUTTON_HID_SLEEPF); |
1da177e4 LT |
1304 | break; |
1305 | } | |
1da177e4 LT |
1306 | } |
1307 | ||
c0af4175 TK |
1308 | void acpi_free_pnp_ids(struct acpi_device_pnp *pnp) |
1309 | { | |
1310 | struct acpi_hardware_id *id, *tmp; | |
1311 | ||
1312 | list_for_each_entry_safe(id, tmp, &pnp->ids, list) { | |
6a0d12ef | 1313 | kfree_const(id->id); |
c0af4175 TK |
1314 | kfree(id); |
1315 | } | |
1316 | kfree(pnp->unique_id); | |
1317 | } | |
1318 | ||
b84f196d SS |
1319 | /** |
1320 | * acpi_dma_supported - Check DMA support for the specified device. | |
1321 | * @adev: The pointer to acpi device | |
1322 | * | |
1323 | * Return false if DMA is not supported. Otherwise, return true | |
1324 | */ | |
1325 | bool acpi_dma_supported(struct acpi_device *adev) | |
1326 | { | |
1327 | if (!adev) | |
1328 | return false; | |
1329 | ||
1330 | if (adev->flags.cca_seen) | |
1331 | return true; | |
1332 | ||
1333 | /* | |
1334 | * Per ACPI 6.0 sec 6.2.17, assume devices can do cache-coherent | |
1335 | * DMA on "Intel platforms". Presumably that includes all x86 and | |
1336 | * ia64, and other arches will set CONFIG_ACPI_CCA_REQUIRED=y. | |
1337 | */ | |
1338 | if (!IS_ENABLED(CONFIG_ACPI_CCA_REQUIRED)) | |
1339 | return true; | |
1340 | ||
1341 | return false; | |
1342 | } | |
1343 | ||
1344 | /** | |
1345 | * acpi_get_dma_attr - Check the supported DMA attr for the specified device. | |
1346 | * @adev: The pointer to acpi device | |
1347 | * | |
1348 | * Return enum dev_dma_attr. | |
1349 | */ | |
1350 | enum dev_dma_attr acpi_get_dma_attr(struct acpi_device *adev) | |
1351 | { | |
1352 | if (!acpi_dma_supported(adev)) | |
1353 | return DEV_DMA_NOT_SUPPORTED; | |
1354 | ||
1355 | if (adev->flags.coherent_dma) | |
1356 | return DEV_DMA_COHERENT; | |
1357 | else | |
1358 | return DEV_DMA_NON_COHERENT; | |
1359 | } | |
1360 | ||
d760a1ba LP |
1361 | /** |
1362 | * acpi_dma_configure - Set-up DMA configuration for the device. | |
1363 | * @dev: The pointer to the device | |
1364 | * @attr: device dma attributes | |
1365 | */ | |
5a1bb638 | 1366 | int acpi_dma_configure(struct device *dev, enum dev_dma_attr attr) |
d760a1ba | 1367 | { |
643b8e4d | 1368 | const struct iommu_ops *iommu; |
5a1bb638 | 1369 | u64 size; |
643b8e4d | 1370 | |
18b709be | 1371 | iort_set_dma_mask(dev); |
d760a1ba | 1372 | |
643b8e4d | 1373 | iommu = iort_iommu_configure(dev); |
058f8c3f S |
1374 | if (IS_ERR(iommu) && PTR_ERR(iommu) == -EPROBE_DEFER) |
1375 | return -EPROBE_DEFER; | |
643b8e4d | 1376 | |
5a1bb638 | 1377 | size = max(dev->coherent_dma_mask, dev->coherent_dma_mask + 1); |
d760a1ba LP |
1378 | /* |
1379 | * Assume dma valid range starts at 0 and covers the whole | |
1380 | * coherent_dma_mask. | |
1381 | */ | |
5a1bb638 S |
1382 | arch_setup_dma_ops(dev, 0, size, iommu, attr == DEV_DMA_COHERENT); |
1383 | ||
1384 | return 0; | |
d760a1ba LP |
1385 | } |
1386 | EXPORT_SYMBOL_GPL(acpi_dma_configure); | |
1387 | ||
1388 | /** | |
1389 | * acpi_dma_deconfigure - Tear-down DMA configuration for the device. | |
1390 | * @dev: The pointer to the device | |
1391 | */ | |
1392 | void acpi_dma_deconfigure(struct device *dev) | |
1393 | { | |
1394 | arch_teardown_dma_ops(dev); | |
1395 | } | |
1396 | EXPORT_SYMBOL_GPL(acpi_dma_deconfigure); | |
1397 | ||
d0562674 SS |
1398 | static void acpi_init_coherency(struct acpi_device *adev) |
1399 | { | |
1400 | unsigned long long cca = 0; | |
1401 | acpi_status status; | |
1402 | struct acpi_device *parent = adev->parent; | |
1403 | ||
1404 | if (parent && parent->flags.cca_seen) { | |
1405 | /* | |
1406 | * From ACPI spec, OSPM will ignore _CCA if an ancestor | |
1407 | * already saw one. | |
1408 | */ | |
1409 | adev->flags.cca_seen = 1; | |
1410 | cca = parent->flags.coherent_dma; | |
1411 | } else { | |
1412 | status = acpi_evaluate_integer(adev->handle, "_CCA", | |
1413 | NULL, &cca); | |
1414 | if (ACPI_SUCCESS(status)) | |
1415 | adev->flags.cca_seen = 1; | |
1416 | else if (!IS_ENABLED(CONFIG_ACPI_CCA_REQUIRED)) | |
1417 | /* | |
1418 | * If architecture does not specify that _CCA is | |
1419 | * required for DMA-able devices (e.g. x86), | |
1420 | * we default to _CCA=1. | |
1421 | */ | |
1422 | cca = 1; | |
1423 | else | |
1424 | acpi_handle_debug(adev->handle, | |
1425 | "ACPI device is missing _CCA.\n"); | |
1426 | } | |
1427 | ||
1428 | adev->flags.coherent_dma = cca; | |
1429 | } | |
1430 | ||
82c7d5ef RW |
1431 | void acpi_init_device_object(struct acpi_device *device, acpi_handle handle, |
1432 | int type, unsigned long long sta) | |
1da177e4 | 1433 | { |
d43e167d RW |
1434 | INIT_LIST_HEAD(&device->pnp.ids); |
1435 | device->device_type = type; | |
1436 | device->handle = handle; | |
1437 | device->parent = acpi_bus_get_parent(handle); | |
8a0662d9 | 1438 | device->fwnode.type = FWNODE_ACPI; |
25db115b | 1439 | acpi_set_device_status(device, sta); |
d43e167d | 1440 | acpi_device_get_busid(device); |
c0af4175 | 1441 | acpi_set_pnp_ids(handle, &device->pnp, type); |
ffdcd955 | 1442 | acpi_init_properties(device); |
d43e167d | 1443 | acpi_bus_get_flags(device); |
2c0d4fe0 | 1444 | device->flags.match_driver = false; |
202317a5 | 1445 | device->flags.initialized = true; |
10c7e20b | 1446 | acpi_device_clear_enumerated(device); |
cf860be6 RW |
1447 | device_initialize(&device->dev); |
1448 | dev_set_uevent_suppress(&device->dev, true); | |
d0562674 | 1449 | acpi_init_coherency(device); |
cf860be6 | 1450 | } |
bc3b0772 | 1451 | |
cf860be6 RW |
1452 | void acpi_device_add_finalize(struct acpi_device *device) |
1453 | { | |
1454 | dev_set_uevent_suppress(&device->dev, false); | |
1455 | kobject_uevent(&device->dev.kobj, KOBJ_ADD); | |
1da177e4 LT |
1456 | } |
1457 | ||
5c478f49 BH |
1458 | static int acpi_add_single_object(struct acpi_device **child, |
1459 | acpi_handle handle, int type, | |
2c0d4fe0 | 1460 | unsigned long long sta) |
1da177e4 | 1461 | { |
77c24888 BH |
1462 | int result; |
1463 | struct acpi_device *device; | |
29aaefa6 | 1464 | struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; |
1da177e4 | 1465 | |
36bcbec7 | 1466 | device = kzalloc(sizeof(struct acpi_device), GFP_KERNEL); |
1da177e4 | 1467 | if (!device) { |
6468463a | 1468 | printk(KERN_ERR PREFIX "Memory allocation error\n"); |
d550d98d | 1469 | return -ENOMEM; |
1da177e4 | 1470 | } |
1da177e4 | 1471 | |
d43e167d RW |
1472 | acpi_init_device_object(device, handle, type, sta); |
1473 | acpi_bus_get_power_flags(device); | |
d57d09a4 | 1474 | acpi_bus_get_wakeup_device_flags(device); |
1da177e4 | 1475 | |
cf860be6 | 1476 | result = acpi_device_add(device, acpi_device_release); |
d43e167d | 1477 | if (result) { |
718fb0de | 1478 | acpi_device_release(&device->dev); |
d43e167d RW |
1479 | return result; |
1480 | } | |
1da177e4 | 1481 | |
d43e167d | 1482 | acpi_power_add_remove_device(device, true); |
cf860be6 | 1483 | acpi_device_add_finalize(device); |
d43e167d RW |
1484 | acpi_get_name(handle, ACPI_FULL_PATHNAME, &buffer); |
1485 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Added %s [%s] parent %s\n", | |
1486 | dev_name(&device->dev), (char *) buffer.pointer, | |
1487 | device->parent ? dev_name(&device->parent->dev) : "(null)")); | |
1488 | kfree(buffer.pointer); | |
1489 | *child = device; | |
1490 | return 0; | |
bf325f95 RW |
1491 | } |
1492 | ||
a4e081b0 SZ |
1493 | static acpi_status acpi_get_resource_memory(struct acpi_resource *ares, |
1494 | void *context) | |
1495 | { | |
1496 | struct resource *res = context; | |
1497 | ||
1498 | if (acpi_dev_resource_memory(ares, res)) | |
1499 | return AE_CTRL_TERMINATE; | |
1500 | ||
1501 | return AE_OK; | |
1502 | } | |
1503 | ||
1504 | static bool acpi_device_should_be_hidden(acpi_handle handle) | |
1505 | { | |
1506 | acpi_status status; | |
1507 | struct resource res; | |
1508 | ||
1509 | /* Check if it should ignore the UART device */ | |
1510 | if (!(spcr_uart_addr && acpi_has_method(handle, METHOD_NAME__CRS))) | |
1511 | return false; | |
1512 | ||
1513 | /* | |
1514 | * The UART device described in SPCR table is assumed to have only one | |
1515 | * memory resource present. So we only look for the first one here. | |
1516 | */ | |
1517 | status = acpi_walk_resources(handle, METHOD_NAME__CRS, | |
1518 | acpi_get_resource_memory, &res); | |
1519 | if (ACPI_FAILURE(status) || res.start != spcr_uart_addr) | |
1520 | return false; | |
1521 | ||
1522 | acpi_handle_info(handle, "The UART device @%pa in SPCR table will be hidden\n", | |
1523 | &res.start); | |
1524 | ||
1525 | return true; | |
1526 | } | |
1527 | ||
778cbc1d BH |
1528 | static int acpi_bus_type_and_status(acpi_handle handle, int *type, |
1529 | unsigned long long *sta) | |
1da177e4 | 1530 | { |
778cbc1d BH |
1531 | acpi_status status; |
1532 | acpi_object_type acpi_type; | |
1da177e4 | 1533 | |
778cbc1d | 1534 | status = acpi_get_type(handle, &acpi_type); |
51a85faf | 1535 | if (ACPI_FAILURE(status)) |
778cbc1d | 1536 | return -ENODEV; |
4be44fcd | 1537 | |
778cbc1d | 1538 | switch (acpi_type) { |
51a85faf BH |
1539 | case ACPI_TYPE_ANY: /* for ACPI_ROOT_OBJECT */ |
1540 | case ACPI_TYPE_DEVICE: | |
a4e081b0 SZ |
1541 | if (acpi_device_should_be_hidden(handle)) |
1542 | return -ENODEV; | |
1543 | ||
778cbc1d BH |
1544 | *type = ACPI_BUS_TYPE_DEVICE; |
1545 | status = acpi_bus_get_status_handle(handle, sta); | |
1546 | if (ACPI_FAILURE(status)) | |
e399037e | 1547 | *sta = 0; |
51a85faf BH |
1548 | break; |
1549 | case ACPI_TYPE_PROCESSOR: | |
778cbc1d BH |
1550 | *type = ACPI_BUS_TYPE_PROCESSOR; |
1551 | status = acpi_bus_get_status_handle(handle, sta); | |
1552 | if (ACPI_FAILURE(status)) | |
1553 | return -ENODEV; | |
51a85faf BH |
1554 | break; |
1555 | case ACPI_TYPE_THERMAL: | |
778cbc1d BH |
1556 | *type = ACPI_BUS_TYPE_THERMAL; |
1557 | *sta = ACPI_STA_DEFAULT; | |
51a85faf BH |
1558 | break; |
1559 | case ACPI_TYPE_POWER: | |
778cbc1d BH |
1560 | *type = ACPI_BUS_TYPE_POWER; |
1561 | *sta = ACPI_STA_DEFAULT; | |
51a85faf BH |
1562 | break; |
1563 | default: | |
778cbc1d | 1564 | return -ENODEV; |
51a85faf | 1565 | } |
1da177e4 | 1566 | |
778cbc1d BH |
1567 | return 0; |
1568 | } | |
1569 | ||
202317a5 RW |
1570 | bool acpi_device_is_present(struct acpi_device *adev) |
1571 | { | |
1572 | if (adev->status.present || adev->status.functional) | |
1573 | return true; | |
1574 | ||
1575 | adev->flags.initialized = false; | |
1576 | return false; | |
1577 | } | |
1578 | ||
4b59cc1f | 1579 | static bool acpi_scan_handler_matching(struct acpi_scan_handler *handler, |
844142c3 | 1580 | const char *idstr, |
4b59cc1f RW |
1581 | const struct acpi_device_id **matchid) |
1582 | { | |
1583 | const struct acpi_device_id *devid; | |
1584 | ||
aca0a4eb RW |
1585 | if (handler->match) |
1586 | return handler->match(idstr, matchid); | |
1587 | ||
4b59cc1f RW |
1588 | for (devid = handler->ids; devid->id[0]; devid++) |
1589 | if (!strcmp((char *)devid->id, idstr)) { | |
1590 | if (matchid) | |
1591 | *matchid = devid; | |
1592 | ||
1593 | return true; | |
1594 | } | |
1595 | ||
1596 | return false; | |
1597 | } | |
1598 | ||
844142c3 | 1599 | static struct acpi_scan_handler *acpi_scan_match_handler(const char *idstr, |
6b772e8f TK |
1600 | const struct acpi_device_id **matchid) |
1601 | { | |
1602 | struct acpi_scan_handler *handler; | |
1603 | ||
1604 | list_for_each_entry(handler, &acpi_scan_handlers_list, list_node) | |
1605 | if (acpi_scan_handler_matching(handler, idstr, matchid)) | |
1606 | return handler; | |
1607 | ||
1608 | return NULL; | |
1609 | } | |
1610 | ||
3f8055c3 RW |
1611 | void acpi_scan_hotplug_enabled(struct acpi_hotplug_profile *hotplug, bool val) |
1612 | { | |
3f8055c3 RW |
1613 | if (!!hotplug->enabled == !!val) |
1614 | return; | |
1615 | ||
1616 | mutex_lock(&acpi_scan_lock); | |
1617 | ||
1618 | hotplug->enabled = val; | |
3f8055c3 RW |
1619 | |
1620 | mutex_unlock(&acpi_scan_lock); | |
1621 | } | |
1622 | ||
3c2cc7ff | 1623 | static void acpi_scan_init_hotplug(struct acpi_device *adev) |
a33ec399 | 1624 | { |
6b772e8f | 1625 | struct acpi_hardware_id *hwid; |
a33ec399 | 1626 | |
b43109fa | 1627 | if (acpi_dock_match(adev->handle) || is_ejectable_bay(adev)) { |
1e2380cd RW |
1628 | acpi_dock_add(adev); |
1629 | return; | |
1630 | } | |
3c2cc7ff RW |
1631 | list_for_each_entry(hwid, &adev->pnp.ids, list) { |
1632 | struct acpi_scan_handler *handler; | |
a33ec399 | 1633 | |
6b772e8f | 1634 | handler = acpi_scan_match_handler(hwid->id, NULL); |
1a699476 RW |
1635 | if (handler) { |
1636 | adev->flags.hotplug_notify = true; | |
1637 | break; | |
1638 | } | |
3c2cc7ff | 1639 | } |
a33ec399 RW |
1640 | } |
1641 | ||
40e7fcb1 LT |
1642 | static void acpi_device_dep_initialize(struct acpi_device *adev) |
1643 | { | |
1644 | struct acpi_dep_data *dep; | |
1645 | struct acpi_handle_list dep_devices; | |
1646 | acpi_status status; | |
1647 | int i; | |
1648 | ||
1649 | if (!acpi_has_method(adev->handle, "_DEP")) | |
1650 | return; | |
1651 | ||
1652 | status = acpi_evaluate_reference(adev->handle, "_DEP", NULL, | |
1653 | &dep_devices); | |
1654 | if (ACPI_FAILURE(status)) { | |
80167a24 | 1655 | dev_dbg(&adev->dev, "Failed to evaluate _DEP.\n"); |
40e7fcb1 LT |
1656 | return; |
1657 | } | |
1658 | ||
1659 | for (i = 0; i < dep_devices.count; i++) { | |
1660 | struct acpi_device_info *info; | |
1661 | int skip; | |
1662 | ||
1663 | status = acpi_get_object_info(dep_devices.handles[i], &info); | |
1664 | if (ACPI_FAILURE(status)) { | |
80167a24 | 1665 | dev_dbg(&adev->dev, "Error reading _DEP device info\n"); |
40e7fcb1 LT |
1666 | continue; |
1667 | } | |
1668 | ||
1669 | /* | |
1670 | * Skip the dependency of Windows System Power | |
1671 | * Management Controller | |
1672 | */ | |
1673 | skip = info->valid & ACPI_VALID_HID && | |
1674 | !strcmp(info->hardware_id.string, "INT3396"); | |
1675 | ||
1676 | kfree(info); | |
1677 | ||
1678 | if (skip) | |
1679 | continue; | |
1680 | ||
1681 | dep = kzalloc(sizeof(struct acpi_dep_data), GFP_KERNEL); | |
1682 | if (!dep) | |
1683 | return; | |
1684 | ||
1685 | dep->master = dep_devices.handles[i]; | |
1686 | dep->slave = adev->handle; | |
1687 | adev->dep_unmet++; | |
1688 | ||
1689 | mutex_lock(&acpi_dep_list_lock); | |
1690 | list_add_tail(&dep->node , &acpi_dep_list); | |
1691 | mutex_unlock(&acpi_dep_list_lock); | |
1692 | } | |
1693 | } | |
1694 | ||
e3863094 RW |
1695 | static acpi_status acpi_bus_check_add(acpi_handle handle, u32 lvl_not_used, |
1696 | void *not_used, void **return_value) | |
778cbc1d | 1697 | { |
805d410f | 1698 | struct acpi_device *device = NULL; |
778cbc1d BH |
1699 | int type; |
1700 | unsigned long long sta; | |
1701 | int result; | |
1702 | ||
4002bf38 RW |
1703 | acpi_bus_get_device(handle, &device); |
1704 | if (device) | |
1705 | goto out; | |
1706 | ||
778cbc1d BH |
1707 | result = acpi_bus_type_and_status(handle, &type, &sta); |
1708 | if (result) | |
1709 | return AE_OK; | |
1710 | ||
82c7d5ef RW |
1711 | if (type == ACPI_BUS_TYPE_POWER) { |
1712 | acpi_add_power_resource(handle); | |
1713 | return AE_OK; | |
1714 | } | |
1715 | ||
2c0d4fe0 | 1716 | acpi_add_single_object(&device, handle, type, sta); |
e3b87f8a | 1717 | if (!device) |
51a85faf | 1718 | return AE_CTRL_DEPTH; |
1da177e4 | 1719 | |
3c2cc7ff | 1720 | acpi_scan_init_hotplug(device); |
40e7fcb1 | 1721 | acpi_device_dep_initialize(device); |
3c2cc7ff | 1722 | |
4002bf38 | 1723 | out: |
51a85faf BH |
1724 | if (!*return_value) |
1725 | *return_value = device; | |
805d410f | 1726 | |
51a85faf BH |
1727 | return AE_OK; |
1728 | } | |
3fb02738 | 1729 | |
48459340 ZR |
1730 | static int acpi_check_spi_i2c_slave(struct acpi_resource *ares, void *data) |
1731 | { | |
1732 | bool *is_spi_i2c_slave_p = data; | |
1733 | ||
1734 | if (ares->type != ACPI_RESOURCE_TYPE_SERIAL_BUS) | |
1735 | return 1; | |
1736 | ||
1737 | /* | |
1738 | * devices that are connected to UART still need to be enumerated to | |
1739 | * platform bus | |
1740 | */ | |
1741 | if (ares->data.common_serial_bus.type != ACPI_RESOURCE_SERIAL_TYPE_UART) | |
1742 | *is_spi_i2c_slave_p = true; | |
1743 | ||
1744 | /* no need to do more checking */ | |
1745 | return -1; | |
1746 | } | |
1747 | ||
1748 | static void acpi_default_enumeration(struct acpi_device *device) | |
1749 | { | |
1750 | struct list_head resource_list; | |
1751 | bool is_spi_i2c_slave = false; | |
1752 | ||
48459340 | 1753 | /* |
68bdb677 | 1754 | * Do not enumerate SPI/I2C slaves as they will be enumerated by their |
48459340 ZR |
1755 | * respective parents. |
1756 | */ | |
1757 | INIT_LIST_HEAD(&resource_list); | |
1758 | acpi_dev_get_resources(device, &resource_list, acpi_check_spi_i2c_slave, | |
1759 | &is_spi_i2c_slave); | |
1760 | acpi_dev_free_resource_list(&resource_list); | |
10c7e20b | 1761 | if (!is_spi_i2c_slave) { |
1571875b | 1762 | acpi_create_platform_device(device, NULL); |
10c7e20b | 1763 | acpi_device_set_enumerated(device); |
68bdb677 OP |
1764 | } else { |
1765 | blocking_notifier_call_chain(&acpi_reconfig_chain, | |
1766 | ACPI_RECONFIG_DEVICE_ADD, device); | |
10c7e20b | 1767 | } |
48459340 ZR |
1768 | } |
1769 | ||
7d284352 | 1770 | static const struct acpi_device_id generic_device_ids[] = { |
ee892094 | 1771 | {ACPI_DT_NAMESPACE_HID, }, |
7d284352 RW |
1772 | {"", }, |
1773 | }; | |
1774 | ||
1775 | static int acpi_generic_device_attach(struct acpi_device *adev, | |
1776 | const struct acpi_device_id *not_used) | |
1777 | { | |
1778 | /* | |
ee892094 RW |
1779 | * Since ACPI_DT_NAMESPACE_HID is the only ID handled here, the test |
1780 | * below can be unconditional. | |
7d284352 RW |
1781 | */ |
1782 | if (adev->data.of_compatible) | |
1783 | acpi_default_enumeration(adev); | |
1784 | ||
1785 | return 1; | |
1786 | } | |
1787 | ||
1788 | static struct acpi_scan_handler generic_device_handler = { | |
1789 | .ids = generic_device_ids, | |
1790 | .attach = acpi_generic_device_attach, | |
1791 | }; | |
1792 | ||
c5698074 | 1793 | static int acpi_scan_attach_handler(struct acpi_device *device) |
ca589f94 | 1794 | { |
c5698074 RW |
1795 | struct acpi_hardware_id *hwid; |
1796 | int ret = 0; | |
ca589f94 | 1797 | |
c5698074 | 1798 | list_for_each_entry(hwid, &device->pnp.ids, list) { |
87b85b3c | 1799 | const struct acpi_device_id *devid; |
c5698074 | 1800 | struct acpi_scan_handler *handler; |
ca589f94 | 1801 | |
c5698074 RW |
1802 | handler = acpi_scan_match_handler(hwid->id, &devid); |
1803 | if (handler) { | |
d34afa9d RW |
1804 | if (!handler->attach) { |
1805 | device->pnp.type.platform_id = 0; | |
1806 | continue; | |
1807 | } | |
9cb32acf | 1808 | device->handler = handler; |
87b85b3c | 1809 | ret = handler->attach(device, devid); |
9cb32acf | 1810 | if (ret > 0) |
c5698074 | 1811 | break; |
9cb32acf RW |
1812 | |
1813 | device->handler = NULL; | |
1814 | if (ret < 0) | |
c5698074 | 1815 | break; |
ca589f94 RW |
1816 | } |
1817 | } | |
48459340 | 1818 | |
ca589f94 RW |
1819 | return ret; |
1820 | } | |
1821 | ||
2c22e652 | 1822 | static void acpi_bus_attach(struct acpi_device *device) |
51a85faf | 1823 | { |
2c22e652 | 1824 | struct acpi_device *child; |
1e2380cd | 1825 | acpi_handle ejd; |
ca589f94 | 1826 | int ret; |
3fb02738 | 1827 | |
1e2380cd RW |
1828 | if (ACPI_SUCCESS(acpi_bus_get_ejd(device->handle, &ejd))) |
1829 | register_dock_dependent_device(device, ejd); | |
1830 | ||
2c22e652 | 1831 | acpi_bus_get_status(device); |
202317a5 | 1832 | /* Skip devices that are not present. */ |
2c22e652 | 1833 | if (!acpi_device_is_present(device)) { |
10c7e20b | 1834 | acpi_device_clear_enumerated(device); |
1b1f3e16 | 1835 | device->flags.power_manageable = 0; |
2c22e652 RW |
1836 | return; |
1837 | } | |
3a391a39 | 1838 | if (device->handler) |
2c22e652 | 1839 | goto ok; |
3a391a39 | 1840 | |
202317a5 | 1841 | if (!device->flags.initialized) { |
1b1f3e16 RW |
1842 | device->flags.power_manageable = |
1843 | device->power.states[ACPI_STATE_D0].flags.valid; | |
1844 | if (acpi_bus_init_power(device)) | |
1845 | device->flags.power_manageable = 0; | |
1846 | ||
202317a5 | 1847 | device->flags.initialized = true; |
c381fc3a RW |
1848 | } else if (device->flags.visited) { |
1849 | goto ok; | |
202317a5 | 1850 | } |
10c7e20b | 1851 | |
ca589f94 | 1852 | ret = acpi_scan_attach_handler(device); |
6931007c | 1853 | if (ret < 0) |
2c22e652 | 1854 | return; |
6931007c RW |
1855 | |
1856 | device->flags.match_driver = true; | |
f406270b RW |
1857 | if (ret > 0) { |
1858 | acpi_device_set_enumerated(device); | |
1859 | goto ok; | |
2c22e652 | 1860 | } |
202317a5 | 1861 | |
f406270b RW |
1862 | ret = device_attach(&device->dev); |
1863 | if (ret < 0) | |
1864 | return; | |
1865 | ||
f5beabfe | 1866 | if (device->pnp.type.platform_id) |
f406270b | 1867 | acpi_default_enumeration(device); |
f5beabfe RW |
1868 | else |
1869 | acpi_device_set_enumerated(device); | |
f406270b | 1870 | |
2c22e652 RW |
1871 | ok: |
1872 | list_for_each_entry(child, &device->children, node) | |
1873 | acpi_bus_attach(child); | |
8ab17fc9 RW |
1874 | |
1875 | if (device->handler && device->handler->hotplug.notify_online) | |
1876 | device->handler->hotplug.notify_online(device); | |
1da177e4 | 1877 | } |
1da177e4 | 1878 | |
40e7fcb1 LT |
1879 | void acpi_walk_dep_device_list(acpi_handle handle) |
1880 | { | |
1881 | struct acpi_dep_data *dep, *tmp; | |
1882 | struct acpi_device *adev; | |
1883 | ||
1884 | mutex_lock(&acpi_dep_list_lock); | |
1885 | list_for_each_entry_safe(dep, tmp, &acpi_dep_list, node) { | |
1886 | if (dep->master == handle) { | |
1887 | acpi_bus_get_device(dep->slave, &adev); | |
1888 | if (!adev) | |
1889 | continue; | |
1890 | ||
1891 | adev->dep_unmet--; | |
1892 | if (!adev->dep_unmet) | |
1893 | acpi_bus_attach(adev); | |
1894 | list_del(&dep->node); | |
1895 | kfree(dep); | |
1896 | } | |
1897 | } | |
1898 | mutex_unlock(&acpi_dep_list_lock); | |
1899 | } | |
1900 | EXPORT_SYMBOL_GPL(acpi_walk_dep_device_list); | |
1901 | ||
636458de | 1902 | /** |
b8bd759a | 1903 | * acpi_bus_scan - Add ACPI device node objects in a given namespace scope. |
636458de | 1904 | * @handle: Root of the namespace scope to scan. |
7779688f | 1905 | * |
636458de RW |
1906 | * Scan a given ACPI tree (probably recently hot-plugged) and create and add |
1907 | * found devices. | |
7779688f | 1908 | * |
636458de RW |
1909 | * If no devices were found, -ENODEV is returned, but it does not mean that |
1910 | * there has been a real error. There just have been no suitable ACPI objects | |
1911 | * in the table trunk from which the kernel could create a device and add an | |
1912 | * appropriate driver. | |
3757b948 RW |
1913 | * |
1914 | * Must be called under acpi_scan_lock. | |
7779688f | 1915 | */ |
b8bd759a | 1916 | int acpi_bus_scan(acpi_handle handle) |
3fb02738 | 1917 | { |
b8bd759a | 1918 | void *device = NULL; |
3fb02738 | 1919 | |
b8bd759a RW |
1920 | if (ACPI_SUCCESS(acpi_bus_check_add(handle, 0, NULL, &device))) |
1921 | acpi_walk_namespace(ACPI_TYPE_ANY, handle, ACPI_UINT32_MAX, | |
1922 | acpi_bus_check_add, NULL, NULL, &device); | |
3fb02738 | 1923 | |
2c22e652 RW |
1924 | if (device) { |
1925 | acpi_bus_attach(device); | |
1926 | return 0; | |
05404d8f | 1927 | } |
2c22e652 | 1928 | return -ENODEV; |
3fb02738 | 1929 | } |
2c22e652 | 1930 | EXPORT_SYMBOL(acpi_bus_scan); |
1da177e4 | 1931 | |
3757b948 | 1932 | /** |
2c22e652 RW |
1933 | * acpi_bus_trim - Detach scan handlers and drivers from ACPI device objects. |
1934 | * @adev: Root of the ACPI namespace scope to walk. | |
3757b948 RW |
1935 | * |
1936 | * Must be called under acpi_scan_lock. | |
1937 | */ | |
2c22e652 | 1938 | void acpi_bus_trim(struct acpi_device *adev) |
1da177e4 | 1939 | { |
2c22e652 RW |
1940 | struct acpi_scan_handler *handler = adev->handler; |
1941 | struct acpi_device *child; | |
1942 | ||
1943 | list_for_each_entry_reverse(child, &adev->children, node) | |
1944 | acpi_bus_trim(child); | |
1945 | ||
a951c773 | 1946 | adev->flags.match_driver = false; |
2c22e652 RW |
1947 | if (handler) { |
1948 | if (handler->detach) | |
1949 | handler->detach(adev); | |
1950 | ||
1951 | adev->handler = NULL; | |
1952 | } else { | |
1953 | device_release_driver(&adev->dev); | |
1954 | } | |
05404d8f | 1955 | /* |
2c22e652 RW |
1956 | * Most likely, the device is going away, so put it into D3cold before |
1957 | * that. | |
05404d8f | 1958 | */ |
2c22e652 RW |
1959 | acpi_device_set_power(adev, ACPI_STATE_D3_COLD); |
1960 | adev->flags.initialized = false; | |
10c7e20b | 1961 | acpi_device_clear_enumerated(adev); |
1da177e4 | 1962 | } |
ceaba663 KA |
1963 | EXPORT_SYMBOL_GPL(acpi_bus_trim); |
1964 | ||
e8b945c9 | 1965 | static int acpi_bus_scan_fixed(void) |
1da177e4 | 1966 | { |
4be44fcd | 1967 | int result = 0; |
c4168bff | 1968 | |
1da177e4 LT |
1969 | /* |
1970 | * Enumerate all fixed-feature devices. | |
1971 | */ | |
2c0d4fe0 RW |
1972 | if (!(acpi_gbl_FADT.flags & ACPI_FADT_POWER_BUTTON)) { |
1973 | struct acpi_device *device = NULL; | |
1974 | ||
5c478f49 | 1975 | result = acpi_add_single_object(&device, NULL, |
c4168bff | 1976 | ACPI_BUS_TYPE_POWER_BUTTON, |
2c0d4fe0 RW |
1977 | ACPI_STA_DEFAULT); |
1978 | if (result) | |
1979 | return result; | |
1980 | ||
88346167 | 1981 | device->flags.match_driver = true; |
2c0d4fe0 RW |
1982 | result = device_attach(&device->dev); |
1983 | if (result < 0) | |
1984 | return result; | |
1985 | ||
c10d7a13 | 1986 | device_init_wakeup(&device->dev, true); |
3fb02738 | 1987 | } |
1da177e4 | 1988 | |
2c0d4fe0 RW |
1989 | if (!(acpi_gbl_FADT.flags & ACPI_FADT_SLEEP_BUTTON)) { |
1990 | struct acpi_device *device = NULL; | |
1991 | ||
5c478f49 | 1992 | result = acpi_add_single_object(&device, NULL, |
c4168bff | 1993 | ACPI_BUS_TYPE_SLEEP_BUTTON, |
2c0d4fe0 RW |
1994 | ACPI_STA_DEFAULT); |
1995 | if (result) | |
1996 | return result; | |
1997 | ||
88346167 | 1998 | device->flags.match_driver = true; |
2c0d4fe0 | 1999 | result = device_attach(&device->dev); |
3fb02738 | 2000 | } |
1da177e4 | 2001 | |
2c0d4fe0 | 2002 | return result < 0 ? result : 0; |
1da177e4 LT |
2003 | } |
2004 | ||
a4e081b0 SZ |
2005 | static void __init acpi_get_spcr_uart_addr(void) |
2006 | { | |
2007 | acpi_status status; | |
2008 | struct acpi_table_spcr *spcr_ptr; | |
2009 | ||
2010 | status = acpi_get_table(ACPI_SIG_SPCR, 0, | |
2011 | (struct acpi_table_header **)&spcr_ptr); | |
2012 | if (ACPI_SUCCESS(status)) | |
2013 | spcr_uart_addr = spcr_ptr->serial_port.address; | |
2014 | else | |
2015 | printk(KERN_WARNING PREFIX "STAO table present, but SPCR is missing\n"); | |
2016 | } | |
2017 | ||
68bdb677 OP |
2018 | static bool acpi_scan_initialized; |
2019 | ||
e747f274 | 2020 | int __init acpi_scan_init(void) |
1da177e4 LT |
2021 | { |
2022 | int result; | |
a4e081b0 SZ |
2023 | acpi_status status; |
2024 | struct acpi_table_stao *stao_ptr; | |
1da177e4 | 2025 | |
92ef2a25 | 2026 | acpi_pci_root_init(); |
4daeaf68 | 2027 | acpi_pci_link_init(); |
ac212b69 | 2028 | acpi_processor_init(); |
f58b082a | 2029 | acpi_lpss_init(); |
92082a88 | 2030 | acpi_apd_init(); |
2fa97feb | 2031 | acpi_cmos_rtc_init(); |
737f1a9f | 2032 | acpi_container_init(); |
0a347644 | 2033 | acpi_memory_hotplug_init(); |
eec15edb | 2034 | acpi_pnp_init(); |
3230bbfc | 2035 | acpi_int340x_thermal_init(); |
6ce2e188 | 2036 | acpi_amba_init(); |
058dfc76 | 2037 | acpi_watchdog_init(); |
97d9a9e9 | 2038 | |
7d284352 RW |
2039 | acpi_scan_add_handler(&generic_device_handler); |
2040 | ||
a4e081b0 SZ |
2041 | /* |
2042 | * If there is STAO table, check whether it needs to ignore the UART | |
2043 | * device in SPCR table. | |
2044 | */ | |
2045 | status = acpi_get_table(ACPI_SIG_STAO, 0, | |
2046 | (struct acpi_table_header **)&stao_ptr); | |
2047 | if (ACPI_SUCCESS(status)) { | |
2048 | if (stao_ptr->header.length > sizeof(struct acpi_table_stao)) | |
2049 | printk(KERN_INFO PREFIX "STAO Name List not yet supported."); | |
2050 | ||
2051 | if (stao_ptr->ignore_uart) | |
2052 | acpi_get_spcr_uart_addr(); | |
2053 | } | |
2054 | ||
3757b948 | 2055 | mutex_lock(&acpi_scan_lock); |
1da177e4 LT |
2056 | /* |
2057 | * Enumerate devices in the ACPI namespace. | |
2058 | */ | |
0cd6ac52 RW |
2059 | result = acpi_bus_scan(ACPI_ROOT_OBJECT); |
2060 | if (result) | |
3757b948 | 2061 | goto out; |
1da177e4 | 2062 | |
0cd6ac52 | 2063 | result = acpi_bus_get_device(ACPI_ROOT_OBJECT, &acpi_root); |
1da177e4 | 2064 | if (result) |
3757b948 | 2065 | goto out; |
1da177e4 | 2066 | |
2650ef42 AL |
2067 | /* Fixed feature devices do not exist on HW-reduced platform */ |
2068 | if (!acpi_gbl_reduced_hardware) { | |
2069 | result = acpi_bus_scan_fixed(); | |
2070 | if (result) { | |
2071 | acpi_detach_data(acpi_root->handle, | |
2072 | acpi_scan_drop_device); | |
2073 | acpi_device_del(acpi_root); | |
2074 | put_device(&acpi_root->dev); | |
2075 | goto out; | |
2076 | } | |
b8bd759a | 2077 | } |
1da177e4 | 2078 | |
9c4aa1ee | 2079 | acpi_gpe_apply_masked_gpes(); |
b8bd759a | 2080 | acpi_update_all_gpes(); |
2a570840 | 2081 | acpi_ec_ecdt_start(); |
3757b948 | 2082 | |
68bdb677 OP |
2083 | acpi_scan_initialized = true; |
2084 | ||
3757b948 RW |
2085 | out: |
2086 | mutex_unlock(&acpi_scan_lock); | |
2087 | return result; | |
1da177e4 | 2088 | } |
e647b532 MZ |
2089 | |
2090 | static struct acpi_probe_entry *ape; | |
2091 | static int acpi_probe_count; | |
5331d9ca | 2092 | static DEFINE_MUTEX(acpi_probe_mutex); |
e647b532 MZ |
2093 | |
2094 | static int __init acpi_match_madt(struct acpi_subtable_header *header, | |
2095 | const unsigned long end) | |
2096 | { | |
2097 | if (!ape->subtable_valid || ape->subtable_valid(header, ape)) | |
2098 | if (!ape->probe_subtbl(header, end)) | |
2099 | acpi_probe_count++; | |
2100 | ||
2101 | return 0; | |
2102 | } | |
2103 | ||
2104 | int __init __acpi_probe_device_table(struct acpi_probe_entry *ap_head, int nr) | |
2105 | { | |
2106 | int count = 0; | |
2107 | ||
2108 | if (acpi_disabled) | |
2109 | return 0; | |
2110 | ||
5331d9ca | 2111 | mutex_lock(&acpi_probe_mutex); |
e647b532 MZ |
2112 | for (ape = ap_head; nr; ape++, nr--) { |
2113 | if (ACPI_COMPARE_NAME(ACPI_SIG_MADT, ape->id)) { | |
2114 | acpi_probe_count = 0; | |
2115 | acpi_table_parse_madt(ape->type, acpi_match_madt, 0); | |
2116 | count += acpi_probe_count; | |
2117 | } else { | |
2118 | int res; | |
2119 | res = acpi_table_parse(ape->id, ape->probe_table); | |
2120 | if (!res) | |
2121 | count++; | |
2122 | } | |
2123 | } | |
5331d9ca | 2124 | mutex_unlock(&acpi_probe_mutex); |
e647b532 MZ |
2125 | |
2126 | return count; | |
2127 | } | |
68bdb677 OP |
2128 | |
2129 | struct acpi_table_events_work { | |
2130 | struct work_struct work; | |
2131 | void *table; | |
2132 | u32 event; | |
2133 | }; | |
2134 | ||
2135 | static void acpi_table_events_fn(struct work_struct *work) | |
2136 | { | |
2137 | struct acpi_table_events_work *tew; | |
2138 | ||
2139 | tew = container_of(work, struct acpi_table_events_work, work); | |
2140 | ||
2141 | if (tew->event == ACPI_TABLE_EVENT_LOAD) { | |
2142 | acpi_scan_lock_acquire(); | |
2143 | acpi_bus_scan(ACPI_ROOT_OBJECT); | |
2144 | acpi_scan_lock_release(); | |
2145 | } | |
2146 | ||
2147 | kfree(tew); | |
2148 | } | |
2149 | ||
2150 | void acpi_scan_table_handler(u32 event, void *table, void *context) | |
2151 | { | |
2152 | struct acpi_table_events_work *tew; | |
2153 | ||
2154 | if (!acpi_scan_initialized) | |
2155 | return; | |
2156 | ||
2157 | if (event != ACPI_TABLE_EVENT_LOAD) | |
2158 | return; | |
2159 | ||
2160 | tew = kmalloc(sizeof(*tew), GFP_KERNEL); | |
2161 | if (!tew) | |
2162 | return; | |
2163 | ||
2164 | INIT_WORK(&tew->work, acpi_table_events_fn); | |
2165 | tew->table = table; | |
2166 | tew->event = event; | |
2167 | ||
2168 | schedule_work(&tew->work); | |
2169 | } | |
2170 | ||
2171 | int acpi_reconfig_notifier_register(struct notifier_block *nb) | |
2172 | { | |
2173 | return blocking_notifier_chain_register(&acpi_reconfig_chain, nb); | |
2174 | } | |
2175 | EXPORT_SYMBOL(acpi_reconfig_notifier_register); | |
2176 | ||
2177 | int acpi_reconfig_notifier_unregister(struct notifier_block *nb) | |
2178 | { | |
2179 | return blocking_notifier_chain_unregister(&acpi_reconfig_chain, nb); | |
2180 | } | |
2181 | EXPORT_SYMBOL(acpi_reconfig_notifier_unregister); |