Commit | Line | Data |
---|---|---|
1da177e4 LT |
1 | /* |
2 | * scan.c - support for transforming the ACPI namespace into individual objects | |
3 | */ | |
4 | ||
5 | #include <linux/module.h> | |
6 | #include <linux/init.h> | |
5a0e3ad6 | 7 | #include <linux/slab.h> |
9b6d97b6 | 8 | #include <linux/kernel.h> |
1da177e4 | 9 | #include <linux/acpi.h> |
74523c90 AK |
10 | #include <linux/signal.h> |
11 | #include <linux/kthread.h> | |
222e82ac | 12 | #include <linux/dmi.h> |
d1efe3c3 | 13 | #include <linux/nls.h> |
1da177e4 | 14 | |
d783156e RW |
15 | #include <asm/pgtable.h> |
16 | ||
e60cc7a6 BH |
17 | #include "internal.h" |
18 | ||
1da177e4 | 19 | #define _COMPONENT ACPI_BUS_COMPONENT |
f52fd66d | 20 | ACPI_MODULE_NAME("scan"); |
4be44fcd | 21 | extern struct acpi_device *acpi_root; |
1da177e4 LT |
22 | |
23 | #define ACPI_BUS_CLASS "system_bus" | |
29b71a1c | 24 | #define ACPI_BUS_HID "LNXSYBUS" |
1da177e4 LT |
25 | #define ACPI_BUS_DEVICE_NAME "System Bus" |
26 | ||
859ac9a4 BH |
27 | #define ACPI_IS_ROOT_DEVICE(device) (!(device)->parent) |
28 | ||
d783156e RW |
29 | #define INVALID_ACPI_HANDLE ((acpi_handle)empty_zero_page) |
30 | ||
683058e3 RW |
31 | /* |
32 | * If set, devices will be hot-removed even if they cannot be put offline | |
33 | * gracefully (from the kernel's standpoint). | |
34 | */ | |
35 | bool acpi_force_hot_remove; | |
36 | ||
620e112c | 37 | static const char *dummy_hid = "device"; |
2b2ae7c7 | 38 | |
40e7fcb1 LT |
39 | static LIST_HEAD(acpi_dep_list); |
40 | static DEFINE_MUTEX(acpi_dep_list_lock); | |
e49bd2dd | 41 | static LIST_HEAD(acpi_bus_id_list); |
c511cc19 | 42 | static DEFINE_MUTEX(acpi_scan_lock); |
ca589f94 | 43 | static LIST_HEAD(acpi_scan_handlers_list); |
9090589d | 44 | DEFINE_MUTEX(acpi_device_lock); |
1da177e4 | 45 | LIST_HEAD(acpi_wakeup_device_list); |
e525506f | 46 | static DEFINE_MUTEX(acpi_hp_context_lock); |
1da177e4 | 47 | |
40e7fcb1 LT |
48 | struct acpi_dep_data { |
49 | struct list_head node; | |
50 | acpi_handle master; | |
51 | acpi_handle slave; | |
52 | }; | |
53 | ||
e49bd2dd | 54 | struct acpi_device_bus_id{ |
bb095854 | 55 | char bus_id[15]; |
e49bd2dd ZR |
56 | unsigned int instance_no; |
57 | struct list_head node; | |
1da177e4 | 58 | }; |
29b71a1c | 59 | |
3757b948 RW |
60 | void acpi_scan_lock_acquire(void) |
61 | { | |
62 | mutex_lock(&acpi_scan_lock); | |
63 | } | |
64 | EXPORT_SYMBOL_GPL(acpi_scan_lock_acquire); | |
65 | ||
66 | void acpi_scan_lock_release(void) | |
67 | { | |
68 | mutex_unlock(&acpi_scan_lock); | |
69 | } | |
70 | EXPORT_SYMBOL_GPL(acpi_scan_lock_release); | |
71 | ||
e525506f RW |
72 | void acpi_lock_hp_context(void) |
73 | { | |
74 | mutex_lock(&acpi_hp_context_lock); | |
75 | } | |
76 | ||
77 | void acpi_unlock_hp_context(void) | |
78 | { | |
79 | mutex_unlock(&acpi_hp_context_lock); | |
80 | } | |
81 | ||
5d513205 RW |
82 | void acpi_initialize_hp_context(struct acpi_device *adev, |
83 | struct acpi_hotplug_context *hp, | |
84 | int (*notify)(struct acpi_device *, u32), | |
85 | void (*uevent)(struct acpi_device *, u32)) | |
86 | { | |
87 | acpi_lock_hp_context(); | |
ba574dc8 RW |
88 | hp->notify = notify; |
89 | hp->uevent = uevent; | |
90 | acpi_set_hp_context(adev, hp); | |
5d513205 RW |
91 | acpi_unlock_hp_context(); |
92 | } | |
93 | EXPORT_SYMBOL_GPL(acpi_initialize_hp_context); | |
94 | ||
ca589f94 RW |
95 | int acpi_scan_add_handler(struct acpi_scan_handler *handler) |
96 | { | |
d34afa9d | 97 | if (!handler) |
ca589f94 RW |
98 | return -EINVAL; |
99 | ||
100 | list_add_tail(&handler->list_node, &acpi_scan_handlers_list); | |
101 | return 0; | |
102 | } | |
103 | ||
3f8055c3 RW |
104 | int acpi_scan_add_handler_with_hotplug(struct acpi_scan_handler *handler, |
105 | const char *hotplug_profile_name) | |
106 | { | |
107 | int error; | |
108 | ||
109 | error = acpi_scan_add_handler(handler); | |
110 | if (error) | |
111 | return error; | |
112 | ||
113 | acpi_sysfs_add_hotplug_profile(&handler->hotplug, hotplug_profile_name); | |
114 | return 0; | |
115 | } | |
116 | ||
8765c5ba RW |
117 | /** |
118 | * create_pnp_modalias - Create hid/cid(s) string for modalias and uevent | |
119 | * @acpi_dev: ACPI device object. | |
120 | * @modalias: Buffer to print into. | |
121 | * @size: Size of the buffer. | |
122 | * | |
29b71a1c TR |
123 | * Creates hid/cid(s) string needed for modalias and uevent |
124 | * e.g. on a device with hid:IBM0001 and cid:ACPI0001 you get: | |
125 | * char *modalias: "acpi:IBM0001:ACPI0001" | |
3d8e0090 ZR |
126 | * Return: 0: no _HID and no _CID |
127 | * -EINVAL: output error | |
128 | * -ENOMEM: output is truncated | |
29b71a1c | 129 | */ |
8765c5ba RW |
130 | static int create_pnp_modalias(struct acpi_device *acpi_dev, char *modalias, |
131 | int size) | |
b3e572d2 | 132 | { |
29b71a1c | 133 | int len; |
5c9fcb5d | 134 | int count; |
7f47fa6c | 135 | struct acpi_hardware_id *id; |
29b71a1c | 136 | |
733e6251 | 137 | /* |
8765c5ba RW |
138 | * Since we skip PRP0001 from the modalias below, 0 should be returned |
139 | * if PRP0001 is the only ACPI/PNP ID in the device's list. | |
733e6251 | 140 | */ |
8765c5ba RW |
141 | count = 0; |
142 | list_for_each_entry(id, &acpi_dev->pnp.ids, list) | |
143 | if (strcmp(id->id, "PRP0001")) | |
144 | count++; | |
733e6251 | 145 | |
8765c5ba RW |
146 | if (!count) |
147 | return 0; | |
148 | ||
149 | len = snprintf(modalias, size, "acpi:"); | |
150 | if (len <= 0) | |
151 | return len; | |
152 | ||
153 | size -= len; | |
154 | ||
155 | list_for_each_entry(id, &acpi_dev->pnp.ids, list) { | |
156 | if (!strcmp(id->id, "PRP0001")) | |
157 | continue; | |
158 | ||
159 | count = snprintf(&modalias[len], size, "%s:", id->id); | |
160 | if (count < 0) | |
161 | return -EINVAL; | |
162 | ||
163 | if (count >= size) | |
164 | return -ENOMEM; | |
165 | ||
166 | len += count; | |
167 | size -= count; | |
5c9fcb5d | 168 | } |
8765c5ba RW |
169 | modalias[len] = '\0'; |
170 | return len; | |
171 | } | |
172 | ||
173 | /** | |
174 | * create_of_modalias - Creates DT compatible string for modalias and uevent | |
175 | * @acpi_dev: ACPI device object. | |
176 | * @modalias: Buffer to print into. | |
177 | * @size: Size of the buffer. | |
178 | * | |
179 | * Expose DT compatible modalias as of:NnameTCcompatible. This function should | |
180 | * only be called for devices having PRP0001 in their list of ACPI/PNP IDs. | |
181 | */ | |
182 | static int create_of_modalias(struct acpi_device *acpi_dev, char *modalias, | |
183 | int size) | |
184 | { | |
185 | struct acpi_buffer buf = { ACPI_ALLOCATE_BUFFER }; | |
186 | const union acpi_object *of_compatible, *obj; | |
187 | int len, count; | |
188 | int i, nval; | |
189 | char *c; | |
5c9fcb5d | 190 | |
8765c5ba RW |
191 | acpi_get_name(acpi_dev->handle, ACPI_SINGLE_NAME, &buf); |
192 | /* DT strings are all in lower case */ | |
193 | for (c = buf.pointer; *c != '\0'; c++) | |
194 | *c = tolower(*c); | |
195 | ||
196 | len = snprintf(modalias, size, "of:N%sT", (char *)buf.pointer); | |
197 | ACPI_FREE(buf.pointer); | |
198 | ||
199 | if (len <= 0) | |
200 | return len; | |
201 | ||
202 | of_compatible = acpi_dev->data.of_compatible; | |
203 | if (of_compatible->type == ACPI_TYPE_PACKAGE) { | |
204 | nval = of_compatible->package.count; | |
205 | obj = of_compatible->package.elements; | |
206 | } else { /* Must be ACPI_TYPE_STRING. */ | |
207 | nval = 1; | |
208 | obj = of_compatible; | |
209 | } | |
210 | for (i = 0; i < nval; i++, obj++) { | |
211 | count = snprintf(&modalias[len], size, "C%s", | |
212 | obj->string.pointer); | |
213 | if (count < 0) | |
214 | return -EINVAL; | |
215 | ||
216 | if (count >= size) | |
217 | return -ENOMEM; | |
218 | ||
219 | len += count; | |
220 | size -= count; | |
221 | } | |
29b71a1c TR |
222 | modalias[len] = '\0'; |
223 | return len; | |
224 | } | |
225 | ||
52870786 MW |
226 | /* |
227 | * acpi_companion_match() - Can we match via ACPI companion device | |
228 | * @dev: Device in question | |
229 | * | |
230 | * Check if the given device has an ACPI companion and if that companion has | |
231 | * a valid list of PNP IDs, and if the device is the first (primary) physical | |
e1acdeb0 RW |
232 | * device associated with it. Return the companion pointer if that's the case |
233 | * or NULL otherwise. | |
52870786 MW |
234 | * |
235 | * If multiple physical devices are attached to a single ACPI companion, we need | |
236 | * to be careful. The usage scenario for this kind of relationship is that all | |
237 | * of the physical devices in question use resources provided by the ACPI | |
238 | * companion. A typical case is an MFD device where all the sub-devices share | |
239 | * the parent's ACPI companion. In such cases we can only allow the primary | |
240 | * (first) physical device to be matched with the help of the companion's PNP | |
241 | * IDs. | |
242 | * | |
243 | * Additional physical devices sharing the ACPI companion can still use | |
244 | * resources available from it but they will be matched normally using functions | |
245 | * provided by their bus types (and analogously for their modalias). | |
246 | */ | |
e1acdeb0 | 247 | static struct acpi_device *acpi_companion_match(const struct device *dev) |
52870786 MW |
248 | { |
249 | struct acpi_device *adev; | |
5f2e3274 | 250 | struct mutex *physical_node_lock; |
52870786 MW |
251 | |
252 | adev = ACPI_COMPANION(dev); | |
253 | if (!adev) | |
e1acdeb0 | 254 | return NULL; |
52870786 MW |
255 | |
256 | if (list_empty(&adev->pnp.ids)) | |
e1acdeb0 | 257 | return NULL; |
52870786 | 258 | |
5f2e3274 RW |
259 | physical_node_lock = &adev->physical_node_lock; |
260 | mutex_lock(physical_node_lock); | |
52870786 | 261 | if (list_empty(&adev->physical_node_list)) { |
e1acdeb0 | 262 | adev = NULL; |
52870786 MW |
263 | } else { |
264 | const struct acpi_device_physical_node *node; | |
265 | ||
266 | node = list_first_entry(&adev->physical_node_list, | |
267 | struct acpi_device_physical_node, node); | |
e1acdeb0 RW |
268 | if (node->dev != dev) |
269 | adev = NULL; | |
52870786 | 270 | } |
5f2e3274 | 271 | mutex_unlock(physical_node_lock); |
52870786 | 272 | |
e1acdeb0 | 273 | return adev; |
52870786 MW |
274 | } |
275 | ||
8765c5ba RW |
276 | static int __acpi_device_uevent_modalias(struct acpi_device *adev, |
277 | struct kobj_uevent_env *env) | |
6eb2451f | 278 | { |
6eb2451f ZR |
279 | int len; |
280 | ||
8765c5ba | 281 | if (!adev) |
6eb2451f ZR |
282 | return -ENODEV; |
283 | ||
8765c5ba RW |
284 | if (list_empty(&adev->pnp.ids)) |
285 | return 0; | |
286 | ||
6eb2451f ZR |
287 | if (add_uevent_var(env, "MODALIAS=")) |
288 | return -ENOMEM; | |
8765c5ba RW |
289 | |
290 | len = create_pnp_modalias(adev, &env->buf[env->buflen - 1], | |
291 | sizeof(env->buf) - env->buflen); | |
292 | if (len < 0) | |
6eb2451f | 293 | return len; |
8765c5ba RW |
294 | |
295 | env->buflen += len; | |
296 | if (!adev->data.of_compatible) | |
297 | return 0; | |
298 | ||
299 | if (len > 0 && add_uevent_var(env, "MODALIAS=")) | |
300 | return -ENOMEM; | |
301 | ||
302 | len = create_of_modalias(adev, &env->buf[env->buflen - 1], | |
303 | sizeof(env->buf) - env->buflen); | |
304 | if (len < 0) | |
305 | return len; | |
306 | ||
6eb2451f | 307 | env->buflen += len; |
8765c5ba | 308 | |
6eb2451f ZR |
309 | return 0; |
310 | } | |
6eb2451f ZR |
311 | |
312 | /* | |
8765c5ba | 313 | * Creates uevent modalias field for ACPI enumerated devices. |
6eb2451f ZR |
314 | * Because the other buses does not support ACPI HIDs & CIDs. |
315 | * e.g. for a device with hid:IBM0001 and cid:ACPI0001 you get: | |
316 | * "acpi:IBM0001:ACPI0001" | |
317 | */ | |
8765c5ba | 318 | int acpi_device_uevent_modalias(struct device *dev, struct kobj_uevent_env *env) |
6eb2451f | 319 | { |
8765c5ba RW |
320 | return __acpi_device_uevent_modalias(acpi_companion_match(dev), env); |
321 | } | |
322 | EXPORT_SYMBOL_GPL(acpi_device_uevent_modalias); | |
323 | ||
324 | static int __acpi_device_modalias(struct acpi_device *adev, char *buf, int size) | |
325 | { | |
326 | int len, count; | |
6eb2451f | 327 | |
8765c5ba | 328 | if (!adev) |
6eb2451f ZR |
329 | return -ENODEV; |
330 | ||
8765c5ba RW |
331 | if (list_empty(&adev->pnp.ids)) |
332 | return 0; | |
333 | ||
334 | len = create_pnp_modalias(adev, buf, size - 1); | |
335 | if (len < 0) { | |
6eb2451f | 336 | return len; |
8765c5ba RW |
337 | } else if (len > 0) { |
338 | buf[len++] = '\n'; | |
339 | size -= len; | |
340 | } | |
341 | if (!adev->data.of_compatible) | |
342 | return len; | |
343 | ||
344 | count = create_of_modalias(adev, buf + len, size - 1); | |
345 | if (count < 0) { | |
346 | return count; | |
347 | } else if (count > 0) { | |
348 | len += count; | |
349 | buf[len++] = '\n'; | |
350 | } | |
351 | ||
6eb2451f ZR |
352 | return len; |
353 | } | |
8765c5ba RW |
354 | |
355 | /* | |
356 | * Creates modalias sysfs attribute for ACPI enumerated devices. | |
357 | * Because the other buses does not support ACPI HIDs & CIDs. | |
358 | * e.g. for a device with hid:IBM0001 and cid:ACPI0001 you get: | |
359 | * "acpi:IBM0001:ACPI0001" | |
360 | */ | |
361 | int acpi_device_modalias(struct device *dev, char *buf, int size) | |
362 | { | |
363 | return __acpi_device_modalias(acpi_companion_match(dev), buf, size); | |
364 | } | |
6eb2451f ZR |
365 | EXPORT_SYMBOL_GPL(acpi_device_modalias); |
366 | ||
29b71a1c TR |
367 | static ssize_t |
368 | acpi_device_modalias_show(struct device *dev, struct device_attribute *attr, char *buf) { | |
8765c5ba | 369 | return __acpi_device_modalias(to_acpi_device(dev), buf, 1024); |
29b71a1c TR |
370 | } |
371 | static DEVICE_ATTR(modalias, 0444, acpi_device_modalias_show, NULL); | |
372 | ||
caa73ea1 | 373 | bool acpi_scan_is_offline(struct acpi_device *adev, bool uevent) |
d22ddcbc RW |
374 | { |
375 | struct acpi_device_physical_node *pn; | |
376 | bool offline = true; | |
377 | ||
378 | mutex_lock(&adev->physical_node_lock); | |
379 | ||
380 | list_for_each_entry(pn, &adev->physical_node_list, node) | |
381 | if (device_supports_offline(pn->dev) && !pn->dev->offline) { | |
caa73ea1 RW |
382 | if (uevent) |
383 | kobject_uevent(&pn->dev->kobj, KOBJ_CHANGE); | |
384 | ||
d22ddcbc RW |
385 | offline = false; |
386 | break; | |
387 | } | |
388 | ||
389 | mutex_unlock(&adev->physical_node_lock); | |
390 | return offline; | |
391 | } | |
392 | ||
7f28ddec RW |
393 | static acpi_status acpi_bus_offline(acpi_handle handle, u32 lvl, void *data, |
394 | void **ret_p) | |
683058e3 RW |
395 | { |
396 | struct acpi_device *device = NULL; | |
397 | struct acpi_device_physical_node *pn; | |
303bfdb1 | 398 | bool second_pass = (bool)data; |
683058e3 RW |
399 | acpi_status status = AE_OK; |
400 | ||
401 | if (acpi_bus_get_device(handle, &device)) | |
402 | return AE_OK; | |
403 | ||
7f28ddec RW |
404 | if (device->handler && !device->handler->hotplug.enabled) { |
405 | *ret_p = &device->dev; | |
406 | return AE_SUPPORT; | |
407 | } | |
408 | ||
683058e3 RW |
409 | mutex_lock(&device->physical_node_lock); |
410 | ||
411 | list_for_each_entry(pn, &device->physical_node_list, node) { | |
412 | int ret; | |
413 | ||
303bfdb1 RW |
414 | if (second_pass) { |
415 | /* Skip devices offlined by the first pass. */ | |
416 | if (pn->put_online) | |
417 | continue; | |
418 | } else { | |
419 | pn->put_online = false; | |
420 | } | |
683058e3 RW |
421 | ret = device_offline(pn->dev); |
422 | if (acpi_force_hot_remove) | |
423 | continue; | |
424 | ||
303bfdb1 RW |
425 | if (ret >= 0) { |
426 | pn->put_online = !ret; | |
427 | } else { | |
428 | *ret_p = pn->dev; | |
429 | if (second_pass) { | |
430 | status = AE_ERROR; | |
431 | break; | |
432 | } | |
683058e3 | 433 | } |
683058e3 RW |
434 | } |
435 | ||
436 | mutex_unlock(&device->physical_node_lock); | |
437 | ||
438 | return status; | |
439 | } | |
440 | ||
7f28ddec RW |
441 | static acpi_status acpi_bus_online(acpi_handle handle, u32 lvl, void *data, |
442 | void **ret_p) | |
683058e3 RW |
443 | { |
444 | struct acpi_device *device = NULL; | |
445 | struct acpi_device_physical_node *pn; | |
446 | ||
447 | if (acpi_bus_get_device(handle, &device)) | |
448 | return AE_OK; | |
449 | ||
450 | mutex_lock(&device->physical_node_lock); | |
451 | ||
452 | list_for_each_entry(pn, &device->physical_node_list, node) | |
453 | if (pn->put_online) { | |
454 | device_online(pn->dev); | |
455 | pn->put_online = false; | |
456 | } | |
457 | ||
458 | mutex_unlock(&device->physical_node_lock); | |
459 | ||
460 | return AE_OK; | |
461 | } | |
462 | ||
d22ddcbc | 463 | static int acpi_scan_try_to_offline(struct acpi_device *device) |
1da177e4 | 464 | { |
5993c467 | 465 | acpi_handle handle = device->handle; |
d22ddcbc | 466 | struct device *errdev = NULL; |
a33ec399 | 467 | acpi_status status; |
f058cdf4 | 468 | |
303bfdb1 RW |
469 | /* |
470 | * Carry out two passes here and ignore errors in the first pass, | |
471 | * because if the devices in question are memory blocks and | |
472 | * CONFIG_MEMCG is set, one of the blocks may hold data structures | |
473 | * that the other blocks depend on, but it is not known in advance which | |
474 | * block holds them. | |
475 | * | |
476 | * If the first pass is successful, the second one isn't needed, though. | |
477 | */ | |
7f28ddec RW |
478 | status = acpi_walk_namespace(ACPI_TYPE_ANY, handle, ACPI_UINT32_MAX, |
479 | NULL, acpi_bus_offline, (void *)false, | |
480 | (void **)&errdev); | |
481 | if (status == AE_SUPPORT) { | |
482 | dev_warn(errdev, "Offline disabled.\n"); | |
483 | acpi_walk_namespace(ACPI_TYPE_ANY, handle, ACPI_UINT32_MAX, | |
484 | acpi_bus_online, NULL, NULL, NULL); | |
7f28ddec RW |
485 | return -EPERM; |
486 | } | |
487 | acpi_bus_offline(handle, 0, (void *)false, (void **)&errdev); | |
303bfdb1 RW |
488 | if (errdev) { |
489 | errdev = NULL; | |
683058e3 | 490 | acpi_walk_namespace(ACPI_TYPE_ANY, handle, ACPI_UINT32_MAX, |
7f28ddec RW |
491 | NULL, acpi_bus_offline, (void *)true, |
492 | (void **)&errdev); | |
303bfdb1 | 493 | if (!errdev || acpi_force_hot_remove) |
7f28ddec RW |
494 | acpi_bus_offline(handle, 0, (void *)true, |
495 | (void **)&errdev); | |
303bfdb1 RW |
496 | |
497 | if (errdev && !acpi_force_hot_remove) { | |
498 | dev_warn(errdev, "Offline failed.\n"); | |
7f28ddec | 499 | acpi_bus_online(handle, 0, NULL, NULL); |
303bfdb1 | 500 | acpi_walk_namespace(ACPI_TYPE_ANY, handle, |
7f28ddec RW |
501 | ACPI_UINT32_MAX, acpi_bus_online, |
502 | NULL, NULL, NULL); | |
303bfdb1 RW |
503 | return -EBUSY; |
504 | } | |
683058e3 | 505 | } |
d22ddcbc RW |
506 | return 0; |
507 | } | |
508 | ||
509 | static int acpi_scan_hot_remove(struct acpi_device *device) | |
510 | { | |
511 | acpi_handle handle = device->handle; | |
512 | unsigned long long sta; | |
513 | acpi_status status; | |
514 | ||
dee15926 TC |
515 | if (device->handler && device->handler->hotplug.demand_offline |
516 | && !acpi_force_hot_remove) { | |
caa73ea1 | 517 | if (!acpi_scan_is_offline(device, true)) |
d22ddcbc RW |
518 | return -EBUSY; |
519 | } else { | |
520 | int error = acpi_scan_try_to_offline(device); | |
521 | if (error) | |
522 | return error; | |
523 | } | |
683058e3 | 524 | |
26d46867 | 525 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
0794469d | 526 | "Hot-removing device %s...\n", dev_name(&device->dev))); |
26d46867 | 527 | |
bfee26db | 528 | acpi_bus_trim(device); |
683058e3 | 529 | |
7d2421f8 | 530 | acpi_evaluate_lck(handle, 0); |
1da177e4 LT |
531 | /* |
532 | * TBD: _EJD support. | |
533 | */ | |
7d2421f8 JL |
534 | status = acpi_evaluate_ej0(handle); |
535 | if (status == AE_NOT_FOUND) | |
536 | return -ENODEV; | |
537 | else if (ACPI_FAILURE(status)) | |
538 | return -EIO; | |
1da177e4 | 539 | |
882fd12e TK |
540 | /* |
541 | * Verify if eject was indeed successful. If not, log an error | |
542 | * message. No need to call _OST since _EJ0 call was made OK. | |
543 | */ | |
544 | status = acpi_evaluate_integer(handle, "_STA", NULL, &sta); | |
545 | if (ACPI_FAILURE(status)) { | |
546 | acpi_handle_warn(handle, | |
547 | "Status check after eject failed (0x%x)\n", status); | |
548 | } else if (sta & ACPI_STA_DEVICE_ENABLED) { | |
549 | acpi_handle_warn(handle, | |
550 | "Eject incomplete - status 0x%llx\n", sta); | |
551 | } | |
552 | ||
a33ec399 RW |
553 | return 0; |
554 | } | |
1da177e4 | 555 | |
443fc820 RW |
556 | static int acpi_scan_device_not_present(struct acpi_device *adev) |
557 | { | |
558 | if (!acpi_device_enumerated(adev)) { | |
559 | dev_warn(&adev->dev, "Still not present\n"); | |
560 | return -EALREADY; | |
561 | } | |
562 | acpi_bus_trim(adev); | |
563 | return 0; | |
564 | } | |
565 | ||
c27b2c33 | 566 | static int acpi_scan_device_check(struct acpi_device *adev) |
a33ec399 | 567 | { |
f943db40 | 568 | int error; |
a33ec399 | 569 | |
443fc820 RW |
570 | acpi_bus_get_status(adev); |
571 | if (adev->status.present || adev->status.functional) { | |
572 | /* | |
573 | * This function is only called for device objects for which | |
574 | * matching scan handlers exist. The only situation in which | |
575 | * the scan handler is not attached to this device object yet | |
576 | * is when the device has just appeared (either it wasn't | |
577 | * present at all before or it was removed and then added | |
578 | * again). | |
579 | */ | |
580 | if (adev->handler) { | |
581 | dev_warn(&adev->dev, "Already enumerated\n"); | |
582 | return -EALREADY; | |
583 | } | |
584 | error = acpi_bus_scan(adev->handle); | |
585 | if (error) { | |
586 | dev_warn(&adev->dev, "Namespace scan failure\n"); | |
587 | return error; | |
588 | } | |
589 | if (!adev->handler) { | |
590 | dev_warn(&adev->dev, "Enumeration failure\n"); | |
591 | error = -ENODEV; | |
592 | } | |
593 | } else { | |
594 | error = acpi_scan_device_not_present(adev); | |
595 | } | |
596 | return error; | |
597 | } | |
598 | ||
599 | static int acpi_scan_bus_check(struct acpi_device *adev) | |
600 | { | |
601 | struct acpi_scan_handler *handler = adev->handler; | |
602 | struct acpi_device *child; | |
603 | int error; | |
604 | ||
605 | acpi_bus_get_status(adev); | |
606 | if (!(adev->status.present || adev->status.functional)) { | |
607 | acpi_scan_device_not_present(adev); | |
608 | return 0; | |
609 | } | |
610 | if (handler && handler->hotplug.scan_dependent) | |
611 | return handler->hotplug.scan_dependent(adev); | |
612 | ||
c27b2c33 RW |
613 | error = acpi_bus_scan(adev->handle); |
614 | if (error) { | |
615 | dev_warn(&adev->dev, "Namespace scan failure\n"); | |
616 | return error; | |
617 | } | |
443fc820 RW |
618 | list_for_each_entry(child, &adev->children, node) { |
619 | error = acpi_scan_bus_check(child); | |
620 | if (error) | |
621 | return error; | |
c27b2c33 RW |
622 | } |
623 | return 0; | |
a33ec399 RW |
624 | } |
625 | ||
3c2cc7ff RW |
626 | static int acpi_generic_hotplug_event(struct acpi_device *adev, u32 type) |
627 | { | |
628 | switch (type) { | |
629 | case ACPI_NOTIFY_BUS_CHECK: | |
630 | return acpi_scan_bus_check(adev); | |
631 | case ACPI_NOTIFY_DEVICE_CHECK: | |
632 | return acpi_scan_device_check(adev); | |
633 | case ACPI_NOTIFY_EJECT_REQUEST: | |
634 | case ACPI_OST_EC_OSPM_EJECT: | |
dd2151be RW |
635 | if (adev->handler && !adev->handler->hotplug.enabled) { |
636 | dev_info(&adev->dev, "Eject disabled\n"); | |
637 | return -EPERM; | |
638 | } | |
700b8422 RW |
639 | acpi_evaluate_ost(adev->handle, ACPI_NOTIFY_EJECT_REQUEST, |
640 | ACPI_OST_SC_EJECT_IN_PROGRESS, NULL); | |
3c2cc7ff RW |
641 | return acpi_scan_hot_remove(adev); |
642 | } | |
643 | return -EINVAL; | |
644 | } | |
645 | ||
1e3bcb59 | 646 | void acpi_device_hotplug(struct acpi_device *adev, u32 src) |
a33ec399 | 647 | { |
a33ec399 | 648 | u32 ost_code = ACPI_OST_SC_NON_SPECIFIC_FAILURE; |
3c2cc7ff | 649 | int error = -ENODEV; |
a33ec399 | 650 | |
683058e3 | 651 | lock_device_hotplug(); |
e0ae8fee | 652 | mutex_lock(&acpi_scan_lock); |
a33ec399 | 653 | |
c27b2c33 RW |
654 | /* |
655 | * The device object's ACPI handle cannot become invalid as long as we | |
3c2cc7ff | 656 | * are holding acpi_scan_lock, but it might have become invalid before |
c27b2c33 RW |
657 | * that lock was acquired. |
658 | */ | |
659 | if (adev->handle == INVALID_ACPI_HANDLE) | |
3c2cc7ff | 660 | goto err_out; |
c27b2c33 | 661 | |
1e2380cd RW |
662 | if (adev->flags.is_dock_station) { |
663 | error = dock_notify(adev, src); | |
664 | } else if (adev->flags.hotplug_notify) { | |
3c2cc7ff | 665 | error = acpi_generic_hotplug_event(adev, src); |
dd2151be RW |
666 | if (error == -EPERM) { |
667 | ost_code = ACPI_OST_SC_EJECT_NOT_SUPPORTED; | |
668 | goto err_out; | |
669 | } | |
3c2cc7ff | 670 | } else { |
be27b3dc | 671 | int (*notify)(struct acpi_device *, u32); |
3c2cc7ff RW |
672 | |
673 | acpi_lock_hp_context(); | |
be27b3dc | 674 | notify = adev->hp ? adev->hp->notify : NULL; |
3c2cc7ff RW |
675 | acpi_unlock_hp_context(); |
676 | /* | |
677 | * There may be additional notify handlers for device objects | |
678 | * without the .event() callback, so ignore them here. | |
679 | */ | |
be27b3dc RW |
680 | if (notify) |
681 | error = notify(adev, src); | |
3c2cc7ff RW |
682 | else |
683 | goto out; | |
a33ec399 | 684 | } |
c27b2c33 RW |
685 | if (!error) |
686 | ost_code = ACPI_OST_SC_SUCCESS; | |
a33ec399 | 687 | |
3c2cc7ff | 688 | err_out: |
700b8422 | 689 | acpi_evaluate_ost(adev->handle, src, ost_code, NULL); |
3c2cc7ff RW |
690 | |
691 | out: | |
78ea4639 | 692 | acpi_bus_put_acpi_device(adev); |
a33ec399 | 693 | mutex_unlock(&acpi_scan_lock); |
e0ae8fee | 694 | unlock_device_hotplug(); |
a33ec399 RW |
695 | } |
696 | ||
836aedb1 RW |
697 | static ssize_t real_power_state_show(struct device *dev, |
698 | struct device_attribute *attr, char *buf) | |
699 | { | |
700 | struct acpi_device *adev = to_acpi_device(dev); | |
701 | int state; | |
702 | int ret; | |
703 | ||
704 | ret = acpi_device_get_power(adev, &state); | |
705 | if (ret) | |
706 | return ret; | |
707 | ||
708 | return sprintf(buf, "%s\n", acpi_power_state_string(state)); | |
709 | } | |
710 | ||
711 | static DEVICE_ATTR(real_power_state, 0444, real_power_state_show, NULL); | |
712 | ||
713 | static ssize_t power_state_show(struct device *dev, | |
714 | struct device_attribute *attr, char *buf) | |
715 | { | |
716 | struct acpi_device *adev = to_acpi_device(dev); | |
717 | ||
718 | return sprintf(buf, "%s\n", acpi_power_state_string(adev->power.state)); | |
719 | } | |
720 | ||
721 | static DEVICE_ATTR(power_state, 0444, power_state_show, NULL); | |
722 | ||
1da177e4 | 723 | static ssize_t |
f883d9db PM |
724 | acpi_eject_store(struct device *d, struct device_attribute *attr, |
725 | const char *buf, size_t count) | |
1da177e4 | 726 | { |
f883d9db | 727 | struct acpi_device *acpi_device = to_acpi_device(d); |
a33ec399 RW |
728 | acpi_object_type not_used; |
729 | acpi_status status; | |
1da177e4 | 730 | |
a33ec399 | 731 | if (!count || buf[0] != '1') |
1da177e4 | 732 | return -EINVAL; |
1da177e4 | 733 | |
a33ec399 RW |
734 | if ((!acpi_device->handler || !acpi_device->handler->hotplug.enabled) |
735 | && !acpi_device->driver) | |
736 | return -ENODEV; | |
737 | ||
738 | status = acpi_get_type(acpi_device->handle, ¬_used); | |
739 | if (ACPI_FAILURE(status) || !acpi_device->flags.ejectable) | |
740 | return -ENODEV; | |
741 | ||
a33ec399 | 742 | get_device(&acpi_device->dev); |
1e3bcb59 | 743 | status = acpi_hotplug_schedule(acpi_device, ACPI_OST_EC_OSPM_EJECT); |
f943db40 RW |
744 | if (ACPI_SUCCESS(status)) |
745 | return count; | |
a33ec399 | 746 | |
f943db40 | 747 | put_device(&acpi_device->dev); |
700b8422 RW |
748 | acpi_evaluate_ost(acpi_device->handle, ACPI_OST_EC_OSPM_EJECT, |
749 | ACPI_OST_SC_NON_SPECIFIC_FAILURE, NULL); | |
5add99cf | 750 | return status == AE_NO_MEMORY ? -ENOMEM : -EAGAIN; |
1da177e4 LT |
751 | } |
752 | ||
f883d9db | 753 | static DEVICE_ATTR(eject, 0200, NULL, acpi_eject_store); |
1da177e4 | 754 | |
e49bd2dd ZR |
755 | static ssize_t |
756 | acpi_device_hid_show(struct device *dev, struct device_attribute *attr, char *buf) { | |
757 | struct acpi_device *acpi_dev = to_acpi_device(dev); | |
1da177e4 | 758 | |
ea8d82fd | 759 | return sprintf(buf, "%s\n", acpi_device_hid(acpi_dev)); |
1da177e4 | 760 | } |
e49bd2dd | 761 | static DEVICE_ATTR(hid, 0444, acpi_device_hid_show, NULL); |
1da177e4 | 762 | |
923d4a45 LZ |
763 | static ssize_t acpi_device_uid_show(struct device *dev, |
764 | struct device_attribute *attr, char *buf) | |
765 | { | |
766 | struct acpi_device *acpi_dev = to_acpi_device(dev); | |
767 | ||
768 | return sprintf(buf, "%s\n", acpi_dev->pnp.unique_id); | |
769 | } | |
770 | static DEVICE_ATTR(uid, 0444, acpi_device_uid_show, NULL); | |
771 | ||
772 | static ssize_t acpi_device_adr_show(struct device *dev, | |
773 | struct device_attribute *attr, char *buf) | |
774 | { | |
775 | struct acpi_device *acpi_dev = to_acpi_device(dev); | |
776 | ||
777 | return sprintf(buf, "0x%08x\n", | |
778 | (unsigned int)(acpi_dev->pnp.bus_address)); | |
779 | } | |
780 | static DEVICE_ATTR(adr, 0444, acpi_device_adr_show, NULL); | |
781 | ||
e49bd2dd ZR |
782 | static ssize_t |
783 | acpi_device_path_show(struct device *dev, struct device_attribute *attr, char *buf) { | |
784 | struct acpi_device *acpi_dev = to_acpi_device(dev); | |
785 | struct acpi_buffer path = {ACPI_ALLOCATE_BUFFER, NULL}; | |
786 | int result; | |
1da177e4 | 787 | |
e49bd2dd | 788 | result = acpi_get_name(acpi_dev->handle, ACPI_FULL_PATHNAME, &path); |
0c526d96 | 789 | if (result) |
e49bd2dd | 790 | goto end; |
1da177e4 | 791 | |
e49bd2dd ZR |
792 | result = sprintf(buf, "%s\n", (char*)path.pointer); |
793 | kfree(path.pointer); | |
0c526d96 | 794 | end: |
e49bd2dd | 795 | return result; |
1da177e4 | 796 | } |
e49bd2dd | 797 | static DEVICE_ATTR(path, 0444, acpi_device_path_show, NULL); |
1da177e4 | 798 | |
d1efe3c3 LO |
799 | /* sysfs file that shows description text from the ACPI _STR method */ |
800 | static ssize_t description_show(struct device *dev, | |
801 | struct device_attribute *attr, | |
802 | char *buf) { | |
803 | struct acpi_device *acpi_dev = to_acpi_device(dev); | |
804 | int result; | |
805 | ||
806 | if (acpi_dev->pnp.str_obj == NULL) | |
807 | return 0; | |
808 | ||
809 | /* | |
810 | * The _STR object contains a Unicode identifier for a device. | |
811 | * We need to convert to utf-8 so it can be displayed. | |
812 | */ | |
813 | result = utf16s_to_utf8s( | |
814 | (wchar_t *)acpi_dev->pnp.str_obj->buffer.pointer, | |
815 | acpi_dev->pnp.str_obj->buffer.length, | |
816 | UTF16_LITTLE_ENDIAN, buf, | |
817 | PAGE_SIZE); | |
818 | ||
819 | buf[result++] = '\n'; | |
820 | ||
821 | return result; | |
822 | } | |
823 | static DEVICE_ATTR(description, 0444, description_show, NULL); | |
824 | ||
bb74ac23 YI |
825 | static ssize_t |
826 | acpi_device_sun_show(struct device *dev, struct device_attribute *attr, | |
827 | char *buf) { | |
828 | struct acpi_device *acpi_dev = to_acpi_device(dev); | |
a383b68d YI |
829 | acpi_status status; |
830 | unsigned long long sun; | |
bb74ac23 | 831 | |
a383b68d YI |
832 | status = acpi_evaluate_integer(acpi_dev->handle, "_SUN", NULL, &sun); |
833 | if (ACPI_FAILURE(status)) | |
834 | return -ENODEV; | |
835 | ||
836 | return sprintf(buf, "%llu\n", sun); | |
bb74ac23 YI |
837 | } |
838 | static DEVICE_ATTR(sun, 0444, acpi_device_sun_show, NULL); | |
839 | ||
c713cd7f SP |
840 | static ssize_t status_show(struct device *dev, struct device_attribute *attr, |
841 | char *buf) { | |
842 | struct acpi_device *acpi_dev = to_acpi_device(dev); | |
843 | acpi_status status; | |
844 | unsigned long long sta; | |
845 | ||
846 | status = acpi_evaluate_integer(acpi_dev->handle, "_STA", NULL, &sta); | |
847 | if (ACPI_FAILURE(status)) | |
848 | return -ENODEV; | |
849 | ||
850 | return sprintf(buf, "%llu\n", sta); | |
851 | } | |
852 | static DEVICE_ATTR_RO(status); | |
853 | ||
e49bd2dd | 854 | static int acpi_device_setup_files(struct acpi_device *dev) |
1da177e4 | 855 | { |
d1efe3c3 | 856 | struct acpi_buffer buffer = {ACPI_ALLOCATE_BUFFER, NULL}; |
f883d9db | 857 | acpi_status status; |
e49bd2dd | 858 | int result = 0; |
1da177e4 LT |
859 | |
860 | /* | |
e49bd2dd | 861 | * Devices gotten from FADT don't have a "path" attribute |
1da177e4 | 862 | */ |
0c526d96 | 863 | if (dev->handle) { |
e49bd2dd | 864 | result = device_create_file(&dev->dev, &dev_attr_path); |
0c526d96 | 865 | if (result) |
e49bd2dd | 866 | goto end; |
1da177e4 LT |
867 | } |
868 | ||
2b2ae7c7 TR |
869 | if (!list_empty(&dev->pnp.ids)) { |
870 | result = device_create_file(&dev->dev, &dev_attr_hid); | |
871 | if (result) | |
872 | goto end; | |
1da177e4 | 873 | |
2b2ae7c7 TR |
874 | result = device_create_file(&dev->dev, &dev_attr_modalias); |
875 | if (result) | |
876 | goto end; | |
877 | } | |
29b71a1c | 878 | |
d1efe3c3 LO |
879 | /* |
880 | * If device has _STR, 'description' file is created | |
881 | */ | |
952c63e9 | 882 | if (acpi_has_method(dev->handle, "_STR")) { |
d1efe3c3 LO |
883 | status = acpi_evaluate_object(dev->handle, "_STR", |
884 | NULL, &buffer); | |
885 | if (ACPI_FAILURE(status)) | |
886 | buffer.pointer = NULL; | |
887 | dev->pnp.str_obj = buffer.pointer; | |
888 | result = device_create_file(&dev->dev, &dev_attr_description); | |
889 | if (result) | |
890 | goto end; | |
891 | } | |
892 | ||
d4e1a692 | 893 | if (dev->pnp.type.bus_address) |
923d4a45 LZ |
894 | result = device_create_file(&dev->dev, &dev_attr_adr); |
895 | if (dev->pnp.unique_id) | |
896 | result = device_create_file(&dev->dev, &dev_attr_uid); | |
897 | ||
a383b68d | 898 | if (acpi_has_method(dev->handle, "_SUN")) { |
bb74ac23 YI |
899 | result = device_create_file(&dev->dev, &dev_attr_sun); |
900 | if (result) | |
901 | goto end; | |
bb74ac23 YI |
902 | } |
903 | ||
c713cd7f SP |
904 | if (acpi_has_method(dev->handle, "_STA")) { |
905 | result = device_create_file(&dev->dev, &dev_attr_status); | |
906 | if (result) | |
907 | goto end; | |
908 | } | |
909 | ||
e49bd2dd ZR |
910 | /* |
911 | * If device has _EJ0, 'eject' file is created that is used to trigger | |
912 | * hot-removal function from userland. | |
913 | */ | |
952c63e9 | 914 | if (acpi_has_method(dev->handle, "_EJ0")) { |
e49bd2dd | 915 | result = device_create_file(&dev->dev, &dev_attr_eject); |
836aedb1 RW |
916 | if (result) |
917 | return result; | |
918 | } | |
919 | ||
920 | if (dev->flags.power_manageable) { | |
921 | result = device_create_file(&dev->dev, &dev_attr_power_state); | |
922 | if (result) | |
923 | return result; | |
924 | ||
925 | if (dev->power.flags.power_resources) | |
926 | result = device_create_file(&dev->dev, | |
927 | &dev_attr_real_power_state); | |
928 | } | |
929 | ||
0c526d96 | 930 | end: |
e49bd2dd | 931 | return result; |
1da177e4 LT |
932 | } |
933 | ||
f883d9db | 934 | static void acpi_device_remove_files(struct acpi_device *dev) |
1da177e4 | 935 | { |
836aedb1 RW |
936 | if (dev->flags.power_manageable) { |
937 | device_remove_file(&dev->dev, &dev_attr_power_state); | |
938 | if (dev->power.flags.power_resources) | |
939 | device_remove_file(&dev->dev, | |
940 | &dev_attr_real_power_state); | |
941 | } | |
942 | ||
f883d9db | 943 | /* |
d1efe3c3 LO |
944 | * If device has _STR, remove 'description' file |
945 | */ | |
952c63e9 | 946 | if (acpi_has_method(dev->handle, "_STR")) { |
d1efe3c3 LO |
947 | kfree(dev->pnp.str_obj); |
948 | device_remove_file(&dev->dev, &dev_attr_description); | |
949 | } | |
950 | /* | |
951 | * If device has _EJ0, remove 'eject' file. | |
f883d9db | 952 | */ |
952c63e9 | 953 | if (acpi_has_method(dev->handle, "_EJ0")) |
f883d9db | 954 | device_remove_file(&dev->dev, &dev_attr_eject); |
1da177e4 | 955 | |
952c63e9 | 956 | if (acpi_has_method(dev->handle, "_SUN")) |
bb74ac23 YI |
957 | device_remove_file(&dev->dev, &dev_attr_sun); |
958 | ||
923d4a45 LZ |
959 | if (dev->pnp.unique_id) |
960 | device_remove_file(&dev->dev, &dev_attr_uid); | |
d4e1a692 | 961 | if (dev->pnp.type.bus_address) |
923d4a45 | 962 | device_remove_file(&dev->dev, &dev_attr_adr); |
1131b938 BH |
963 | device_remove_file(&dev->dev, &dev_attr_modalias); |
964 | device_remove_file(&dev->dev, &dev_attr_hid); | |
c713cd7f SP |
965 | if (acpi_has_method(dev->handle, "_STA")) |
966 | device_remove_file(&dev->dev, &dev_attr_status); | |
0c526d96 | 967 | if (dev->handle) |
e49bd2dd | 968 | device_remove_file(&dev->dev, &dev_attr_path); |
1da177e4 | 969 | } |
1da177e4 | 970 | /* -------------------------------------------------------------------------- |
9e89dde2 | 971 | ACPI Bus operations |
1da177e4 | 972 | -------------------------------------------------------------------------- */ |
29b71a1c | 973 | |
2b9c698e RW |
974 | /** |
975 | * acpi_of_match_device - Match device object using the "compatible" property. | |
976 | * @adev: ACPI device object to match. | |
977 | * @of_match_table: List of device IDs to match against. | |
978 | * | |
979 | * If @dev has an ACPI companion which has the special PRP0001 device ID in its | |
980 | * list of identifiers and a _DSD object with the "compatible" property, use | |
981 | * that property to match against the given list of identifiers. | |
982 | */ | |
983 | static bool acpi_of_match_device(struct acpi_device *adev, | |
984 | const struct of_device_id *of_match_table) | |
985 | { | |
986 | const union acpi_object *of_compatible, *obj; | |
987 | int i, nval; | |
988 | ||
989 | if (!adev) | |
990 | return false; | |
991 | ||
992 | of_compatible = adev->data.of_compatible; | |
993 | if (!of_match_table || !of_compatible) | |
994 | return false; | |
995 | ||
996 | if (of_compatible->type == ACPI_TYPE_PACKAGE) { | |
997 | nval = of_compatible->package.count; | |
998 | obj = of_compatible->package.elements; | |
999 | } else { /* Must be ACPI_TYPE_STRING. */ | |
1000 | nval = 1; | |
1001 | obj = of_compatible; | |
1002 | } | |
1003 | /* Now we can look for the driver DT compatible strings */ | |
1004 | for (i = 0; i < nval; i++, obj++) { | |
1005 | const struct of_device_id *id; | |
1006 | ||
1007 | for (id = of_match_table; id->compatible[0]; id++) | |
1008 | if (!strcasecmp(obj->string.pointer, id->compatible)) | |
1009 | return true; | |
1010 | } | |
1011 | ||
1012 | return false; | |
1013 | } | |
1014 | ||
cf761af9 | 1015 | static const struct acpi_device_id *__acpi_match_device( |
2b9c698e RW |
1016 | struct acpi_device *device, |
1017 | const struct acpi_device_id *ids, | |
1018 | const struct of_device_id *of_ids) | |
29b71a1c TR |
1019 | { |
1020 | const struct acpi_device_id *id; | |
7f47fa6c | 1021 | struct acpi_hardware_id *hwid; |
29b71a1c | 1022 | |
39a0ad87 ZY |
1023 | /* |
1024 | * If the device is not present, it is unnecessary to load device | |
1025 | * driver for it. | |
1026 | */ | |
e1acdeb0 | 1027 | if (!device || !device->status.present) |
cf761af9 | 1028 | return NULL; |
39a0ad87 | 1029 | |
2b9c698e RW |
1030 | list_for_each_entry(hwid, &device->pnp.ids, list) { |
1031 | /* First, check the ACPI/PNP IDs provided by the caller. */ | |
1032 | for (id = ids; id->id[0]; id++) | |
7f47fa6c | 1033 | if (!strcmp((char *) id->id, hwid->id)) |
cf761af9 MW |
1034 | return id; |
1035 | ||
2b9c698e RW |
1036 | /* |
1037 | * Next, check the special "PRP0001" ID and try to match the | |
1038 | * "compatible" property if found. | |
1039 | * | |
1040 | * The id returned by the below is not valid, but the only | |
1041 | * caller passing non-NULL of_ids here is only interested in | |
1042 | * whether or not the return value is NULL. | |
1043 | */ | |
1044 | if (!strcmp("PRP0001", hwid->id) | |
1045 | && acpi_of_match_device(device, of_ids)) | |
1046 | return id; | |
1047 | } | |
cf761af9 MW |
1048 | return NULL; |
1049 | } | |
1050 | ||
1051 | /** | |
1052 | * acpi_match_device - Match a struct device against a given list of ACPI IDs | |
1053 | * @ids: Array of struct acpi_device_id object to match against. | |
1054 | * @dev: The device structure to match. | |
1055 | * | |
1056 | * Check if @dev has a valid ACPI handle and if there is a struct acpi_device | |
1057 | * object for that handle and use that object to match against a given list of | |
1058 | * device IDs. | |
1059 | * | |
1060 | * Return a pointer to the first matching ID on success or %NULL on failure. | |
1061 | */ | |
1062 | const struct acpi_device_id *acpi_match_device(const struct acpi_device_id *ids, | |
1063 | const struct device *dev) | |
1064 | { | |
2b9c698e | 1065 | return __acpi_match_device(acpi_companion_match(dev), ids, NULL); |
cf761af9 MW |
1066 | } |
1067 | EXPORT_SYMBOL_GPL(acpi_match_device); | |
29b71a1c | 1068 | |
cf761af9 MW |
1069 | int acpi_match_device_ids(struct acpi_device *device, |
1070 | const struct acpi_device_id *ids) | |
1071 | { | |
2b9c698e | 1072 | return __acpi_match_device(device, ids, NULL) ? 0 : -ENOENT; |
29b71a1c TR |
1073 | } |
1074 | EXPORT_SYMBOL(acpi_match_device_ids); | |
1075 | ||
733e6251 MW |
1076 | bool acpi_driver_match_device(struct device *dev, |
1077 | const struct device_driver *drv) | |
1078 | { | |
1079 | if (!drv->acpi_match_table) | |
2b9c698e RW |
1080 | return acpi_of_match_device(ACPI_COMPANION(dev), |
1081 | drv->of_match_table); | |
733e6251 | 1082 | |
2b9c698e RW |
1083 | return !!__acpi_match_device(acpi_companion_match(dev), |
1084 | drv->acpi_match_table, drv->of_match_table); | |
733e6251 MW |
1085 | } |
1086 | EXPORT_SYMBOL_GPL(acpi_driver_match_device); | |
1087 | ||
0b224527 RW |
1088 | static void acpi_free_power_resources_lists(struct acpi_device *device) |
1089 | { | |
1090 | int i; | |
1091 | ||
993cbe59 RW |
1092 | if (device->wakeup.flags.valid) |
1093 | acpi_power_resources_list_free(&device->wakeup.resources); | |
1094 | ||
1b1f3e16 | 1095 | if (!device->power.flags.power_resources) |
0b224527 RW |
1096 | return; |
1097 | ||
1098 | for (i = ACPI_STATE_D0; i <= ACPI_STATE_D3_HOT; i++) { | |
1099 | struct acpi_device_power_state *ps = &device->power.states[i]; | |
1100 | acpi_power_resources_list_free(&ps->resources); | |
1101 | } | |
7f47fa6c BH |
1102 | } |
1103 | ||
1890a97a | 1104 | static void acpi_device_release(struct device *dev) |
1da177e4 | 1105 | { |
1890a97a | 1106 | struct acpi_device *acpi_dev = to_acpi_device(dev); |
1da177e4 | 1107 | |
ffdcd955 | 1108 | acpi_free_properties(acpi_dev); |
c0af4175 | 1109 | acpi_free_pnp_ids(&acpi_dev->pnp); |
0b224527 | 1110 | acpi_free_power_resources_lists(acpi_dev); |
1890a97a | 1111 | kfree(acpi_dev); |
1da177e4 LT |
1112 | } |
1113 | ||
5d9464a4 | 1114 | static int acpi_bus_match(struct device *dev, struct device_driver *drv) |
9e89dde2 | 1115 | { |
5d9464a4 PM |
1116 | struct acpi_device *acpi_dev = to_acpi_device(dev); |
1117 | struct acpi_driver *acpi_drv = to_acpi_driver(drv); | |
1da177e4 | 1118 | |
209d3b17 | 1119 | return acpi_dev->flags.match_driver |
805d410f | 1120 | && !acpi_match_device_ids(acpi_dev, acpi_drv->ids); |
5d9464a4 | 1121 | } |
1da177e4 | 1122 | |
7eff2e7a | 1123 | static int acpi_device_uevent(struct device *dev, struct kobj_uevent_env *env) |
1da177e4 | 1124 | { |
8765c5ba | 1125 | return __acpi_device_uevent_modalias(to_acpi_device(dev), env); |
1da177e4 LT |
1126 | } |
1127 | ||
46ec8598 BH |
1128 | static void acpi_device_notify(acpi_handle handle, u32 event, void *data) |
1129 | { | |
1130 | struct acpi_device *device = data; | |
1131 | ||
1132 | device->driver->ops.notify(device, event); | |
1133 | } | |
1134 | ||
236105db | 1135 | static void acpi_device_notify_fixed(void *data) |
46ec8598 BH |
1136 | { |
1137 | struct acpi_device *device = data; | |
1138 | ||
53de5356 BH |
1139 | /* Fixed hardware devices have no handles */ |
1140 | acpi_device_notify(NULL, ACPI_FIXED_HARDWARE_EVENT, device); | |
236105db LT |
1141 | } |
1142 | ||
fd9caef4 | 1143 | static u32 acpi_device_fixed_event(void *data) |
236105db LT |
1144 | { |
1145 | acpi_os_execute(OSL_NOTIFY_HANDLER, acpi_device_notify_fixed, data); | |
fd9caef4 | 1146 | return ACPI_INTERRUPT_HANDLED; |
46ec8598 BH |
1147 | } |
1148 | ||
1149 | static int acpi_device_install_notify_handler(struct acpi_device *device) | |
1150 | { | |
1151 | acpi_status status; | |
46ec8598 | 1152 | |
ccba2a36 | 1153 | if (device->device_type == ACPI_BUS_TYPE_POWER_BUTTON) |
46ec8598 BH |
1154 | status = |
1155 | acpi_install_fixed_event_handler(ACPI_EVENT_POWER_BUTTON, | |
236105db | 1156 | acpi_device_fixed_event, |
46ec8598 | 1157 | device); |
ccba2a36 | 1158 | else if (device->device_type == ACPI_BUS_TYPE_SLEEP_BUTTON) |
46ec8598 BH |
1159 | status = |
1160 | acpi_install_fixed_event_handler(ACPI_EVENT_SLEEP_BUTTON, | |
236105db | 1161 | acpi_device_fixed_event, |
46ec8598 BH |
1162 | device); |
1163 | else | |
1164 | status = acpi_install_notify_handler(device->handle, | |
1165 | ACPI_DEVICE_NOTIFY, | |
1166 | acpi_device_notify, | |
1167 | device); | |
1168 | ||
1169 | if (ACPI_FAILURE(status)) | |
1170 | return -EINVAL; | |
1171 | return 0; | |
1172 | } | |
1173 | ||
1174 | static void acpi_device_remove_notify_handler(struct acpi_device *device) | |
1175 | { | |
ccba2a36 | 1176 | if (device->device_type == ACPI_BUS_TYPE_POWER_BUTTON) |
46ec8598 | 1177 | acpi_remove_fixed_event_handler(ACPI_EVENT_POWER_BUTTON, |
236105db | 1178 | acpi_device_fixed_event); |
ccba2a36 | 1179 | else if (device->device_type == ACPI_BUS_TYPE_SLEEP_BUTTON) |
46ec8598 | 1180 | acpi_remove_fixed_event_handler(ACPI_EVENT_SLEEP_BUTTON, |
236105db | 1181 | acpi_device_fixed_event); |
46ec8598 BH |
1182 | else |
1183 | acpi_remove_notify_handler(device->handle, ACPI_DEVICE_NOTIFY, | |
1184 | acpi_device_notify); | |
1185 | } | |
1186 | ||
d9e455f5 | 1187 | static int acpi_device_probe(struct device *dev) |
1da177e4 | 1188 | { |
5d9464a4 PM |
1189 | struct acpi_device *acpi_dev = to_acpi_device(dev); |
1190 | struct acpi_driver *acpi_drv = to_acpi_driver(dev->driver); | |
1191 | int ret; | |
1192 | ||
fc2e0a83 | 1193 | if (acpi_dev->handler && !acpi_is_pnp_device(acpi_dev)) |
24071f47 RW |
1194 | return -EINVAL; |
1195 | ||
d9e455f5 RW |
1196 | if (!acpi_drv->ops.add) |
1197 | return -ENOSYS; | |
46ec8598 | 1198 | |
d9e455f5 RW |
1199 | ret = acpi_drv->ops.add(acpi_dev); |
1200 | if (ret) | |
1201 | return ret; | |
46ec8598 | 1202 | |
d9e455f5 RW |
1203 | acpi_dev->driver = acpi_drv; |
1204 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, | |
1205 | "Driver [%s] successfully bound to device [%s]\n", | |
1206 | acpi_drv->name, acpi_dev->pnp.bus_id)); | |
1207 | ||
1208 | if (acpi_drv->ops.notify) { | |
1209 | ret = acpi_device_install_notify_handler(acpi_dev); | |
1210 | if (ret) { | |
1211 | if (acpi_drv->ops.remove) | |
1212 | acpi_drv->ops.remove(acpi_dev); | |
1213 | ||
1214 | acpi_dev->driver = NULL; | |
1215 | acpi_dev->driver_data = NULL; | |
1216 | return ret; | |
1217 | } | |
5d9464a4 | 1218 | } |
d9e455f5 RW |
1219 | |
1220 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Found driver [%s] for device [%s]\n", | |
1221 | acpi_drv->name, acpi_dev->pnp.bus_id)); | |
1222 | get_device(dev); | |
1223 | return 0; | |
5d9464a4 | 1224 | } |
1da177e4 | 1225 | |
5d9464a4 PM |
1226 | static int acpi_device_remove(struct device * dev) |
1227 | { | |
1228 | struct acpi_device *acpi_dev = to_acpi_device(dev); | |
1229 | struct acpi_driver *acpi_drv = acpi_dev->driver; | |
1230 | ||
1231 | if (acpi_drv) { | |
46ec8598 BH |
1232 | if (acpi_drv->ops.notify) |
1233 | acpi_device_remove_notify_handler(acpi_dev); | |
5d9464a4 | 1234 | if (acpi_drv->ops.remove) |
51fac838 | 1235 | acpi_drv->ops.remove(acpi_dev); |
1da177e4 | 1236 | } |
5d9464a4 | 1237 | acpi_dev->driver = NULL; |
db89b4f0 | 1238 | acpi_dev->driver_data = NULL; |
1da177e4 | 1239 | |
5d9464a4 | 1240 | put_device(dev); |
9e89dde2 ZR |
1241 | return 0; |
1242 | } | |
1da177e4 | 1243 | |
55955aad | 1244 | struct bus_type acpi_bus_type = { |
9e89dde2 | 1245 | .name = "acpi", |
5d9464a4 PM |
1246 | .match = acpi_bus_match, |
1247 | .probe = acpi_device_probe, | |
1248 | .remove = acpi_device_remove, | |
1249 | .uevent = acpi_device_uevent, | |
9e89dde2 ZR |
1250 | }; |
1251 | ||
d783156e RW |
1252 | static void acpi_device_del(struct acpi_device *device) |
1253 | { | |
1254 | mutex_lock(&acpi_device_lock); | |
1255 | if (device->parent) | |
1256 | list_del(&device->node); | |
1257 | ||
1258 | list_del(&device->wakeup_list); | |
1259 | mutex_unlock(&acpi_device_lock); | |
1260 | ||
1261 | acpi_power_add_remove_device(device, false); | |
1262 | acpi_device_remove_files(device); | |
1263 | if (device->remove) | |
1264 | device->remove(device); | |
1265 | ||
1266 | device_del(&device->dev); | |
1267 | } | |
1268 | ||
1269 | static LIST_HEAD(acpi_device_del_list); | |
1270 | static DEFINE_MUTEX(acpi_device_del_lock); | |
1271 | ||
1272 | static void acpi_device_del_work_fn(struct work_struct *work_not_used) | |
1273 | { | |
1274 | for (;;) { | |
1275 | struct acpi_device *adev; | |
1276 | ||
1277 | mutex_lock(&acpi_device_del_lock); | |
1278 | ||
1279 | if (list_empty(&acpi_device_del_list)) { | |
1280 | mutex_unlock(&acpi_device_del_lock); | |
1281 | break; | |
1282 | } | |
1283 | adev = list_first_entry(&acpi_device_del_list, | |
1284 | struct acpi_device, del_list); | |
1285 | list_del(&adev->del_list); | |
1286 | ||
1287 | mutex_unlock(&acpi_device_del_lock); | |
1288 | ||
1289 | acpi_device_del(adev); | |
1290 | /* | |
1291 | * Drop references to all power resources that might have been | |
1292 | * used by the device. | |
1293 | */ | |
1294 | acpi_power_transition(adev, ACPI_STATE_D3_COLD); | |
1295 | put_device(&adev->dev); | |
1296 | } | |
1297 | } | |
1298 | ||
1299 | /** | |
1300 | * acpi_scan_drop_device - Drop an ACPI device object. | |
1301 | * @handle: Handle of an ACPI namespace node, not used. | |
1302 | * @context: Address of the ACPI device object to drop. | |
1303 | * | |
1304 | * This is invoked by acpi_ns_delete_node() during the removal of the ACPI | |
1305 | * namespace node the device object pointed to by @context is attached to. | |
1306 | * | |
1307 | * The unregistration is carried out asynchronously to avoid running | |
1308 | * acpi_device_del() under the ACPICA's namespace mutex and the list is used to | |
1309 | * ensure the correct ordering (the device objects must be unregistered in the | |
1310 | * same order in which the corresponding namespace nodes are deleted). | |
1311 | */ | |
1312 | static void acpi_scan_drop_device(acpi_handle handle, void *context) | |
caf5c03f | 1313 | { |
d783156e RW |
1314 | static DECLARE_WORK(work, acpi_device_del_work_fn); |
1315 | struct acpi_device *adev = context; | |
1316 | ||
1317 | mutex_lock(&acpi_device_del_lock); | |
1318 | ||
1319 | /* | |
1320 | * Use the ACPI hotplug workqueue which is ordered, so this work item | |
1321 | * won't run after any hotplug work items submitted subsequently. That | |
1322 | * prevents attempts to register device objects identical to those being | |
1323 | * deleted from happening concurrently (such attempts result from | |
1324 | * hotplug events handled via the ACPI hotplug workqueue). It also will | |
1325 | * run after all of the work items submitted previosuly, which helps | |
1326 | * those work items to ensure that they are not accessing stale device | |
1327 | * objects. | |
1328 | */ | |
1329 | if (list_empty(&acpi_device_del_list)) | |
1330 | acpi_queue_hotplug_work(&work); | |
1331 | ||
1332 | list_add_tail(&adev->del_list, &acpi_device_del_list); | |
1333 | /* Make acpi_ns_validate_handle() return NULL for this handle. */ | |
1334 | adev->handle = INVALID_ACPI_HANDLE; | |
1335 | ||
1336 | mutex_unlock(&acpi_device_del_lock); | |
caf5c03f RW |
1337 | } |
1338 | ||
78ea4639 RW |
1339 | static int acpi_get_device_data(acpi_handle handle, struct acpi_device **device, |
1340 | void (*callback)(void *)) | |
caf5c03f RW |
1341 | { |
1342 | acpi_status status; | |
1343 | ||
1344 | if (!device) | |
1345 | return -EINVAL; | |
1346 | ||
78ea4639 RW |
1347 | status = acpi_get_data_full(handle, acpi_scan_drop_device, |
1348 | (void **)device, callback); | |
caf5c03f RW |
1349 | if (ACPI_FAILURE(status) || !*device) { |
1350 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "No context for object [%p]\n", | |
1351 | handle)); | |
1352 | return -ENODEV; | |
1353 | } | |
1354 | return 0; | |
1355 | } | |
78ea4639 RW |
1356 | |
1357 | int acpi_bus_get_device(acpi_handle handle, struct acpi_device **device) | |
1358 | { | |
1359 | return acpi_get_device_data(handle, device, NULL); | |
1360 | } | |
6585925b | 1361 | EXPORT_SYMBOL(acpi_bus_get_device); |
caf5c03f | 1362 | |
78ea4639 RW |
1363 | static void get_acpi_device(void *dev) |
1364 | { | |
1365 | if (dev) | |
1366 | get_device(&((struct acpi_device *)dev)->dev); | |
1367 | } | |
1368 | ||
1369 | struct acpi_device *acpi_bus_get_acpi_device(acpi_handle handle) | |
1370 | { | |
1371 | struct acpi_device *adev = NULL; | |
1372 | ||
1373 | acpi_get_device_data(handle, &adev, get_acpi_device); | |
1374 | return adev; | |
1375 | } | |
1376 | ||
1377 | void acpi_bus_put_acpi_device(struct acpi_device *adev) | |
1378 | { | |
1379 | put_device(&adev->dev); | |
1380 | } | |
1381 | ||
cf860be6 RW |
1382 | int acpi_device_add(struct acpi_device *device, |
1383 | void (*release)(struct device *)) | |
1da177e4 | 1384 | { |
4be44fcd | 1385 | int result; |
e49bd2dd ZR |
1386 | struct acpi_device_bus_id *acpi_device_bus_id, *new_bus_id; |
1387 | int found = 0; | |
66b7ed40 | 1388 | |
d43e167d RW |
1389 | if (device->handle) { |
1390 | acpi_status status; | |
1391 | ||
d783156e | 1392 | status = acpi_attach_data(device->handle, acpi_scan_drop_device, |
d43e167d RW |
1393 | device); |
1394 | if (ACPI_FAILURE(status)) { | |
1395 | acpi_handle_err(device->handle, | |
1396 | "Unable to attach device data\n"); | |
1397 | return -ENODEV; | |
1398 | } | |
1399 | } | |
1400 | ||
9e89dde2 ZR |
1401 | /* |
1402 | * Linkage | |
1403 | * ------- | |
1404 | * Link this device to its parent and siblings. | |
1405 | */ | |
1406 | INIT_LIST_HEAD(&device->children); | |
1407 | INIT_LIST_HEAD(&device->node); | |
9e89dde2 | 1408 | INIT_LIST_HEAD(&device->wakeup_list); |
1033f904 | 1409 | INIT_LIST_HEAD(&device->physical_node_list); |
d783156e | 1410 | INIT_LIST_HEAD(&device->del_list); |
1033f904 | 1411 | mutex_init(&device->physical_node_lock); |
1da177e4 | 1412 | |
e49bd2dd ZR |
1413 | new_bus_id = kzalloc(sizeof(struct acpi_device_bus_id), GFP_KERNEL); |
1414 | if (!new_bus_id) { | |
d43e167d RW |
1415 | pr_err(PREFIX "Memory allocation error\n"); |
1416 | result = -ENOMEM; | |
1417 | goto err_detach; | |
1da177e4 | 1418 | } |
e49bd2dd | 1419 | |
9090589d | 1420 | mutex_lock(&acpi_device_lock); |
e49bd2dd ZR |
1421 | /* |
1422 | * Find suitable bus_id and instance number in acpi_bus_id_list | |
1423 | * If failed, create one and link it into acpi_bus_id_list | |
1424 | */ | |
1425 | list_for_each_entry(acpi_device_bus_id, &acpi_bus_id_list, node) { | |
1131b938 BH |
1426 | if (!strcmp(acpi_device_bus_id->bus_id, |
1427 | acpi_device_hid(device))) { | |
1428 | acpi_device_bus_id->instance_no++; | |
e49bd2dd ZR |
1429 | found = 1; |
1430 | kfree(new_bus_id); | |
1431 | break; | |
1432 | } | |
1da177e4 | 1433 | } |
0c526d96 | 1434 | if (!found) { |
e49bd2dd | 1435 | acpi_device_bus_id = new_bus_id; |
1131b938 | 1436 | strcpy(acpi_device_bus_id->bus_id, acpi_device_hid(device)); |
e49bd2dd ZR |
1437 | acpi_device_bus_id->instance_no = 0; |
1438 | list_add_tail(&acpi_device_bus_id->node, &acpi_bus_id_list); | |
1da177e4 | 1439 | } |
0794469d | 1440 | dev_set_name(&device->dev, "%s:%02x", acpi_device_bus_id->bus_id, acpi_device_bus_id->instance_no); |
1da177e4 | 1441 | |
33b57150 | 1442 | if (device->parent) |
9e89dde2 | 1443 | list_add_tail(&device->node, &device->parent->children); |
33b57150 | 1444 | |
9e89dde2 ZR |
1445 | if (device->wakeup.flags.valid) |
1446 | list_add_tail(&device->wakeup_list, &acpi_wakeup_device_list); | |
9090589d | 1447 | mutex_unlock(&acpi_device_lock); |
1da177e4 | 1448 | |
1890a97a | 1449 | if (device->parent) |
66b7ed40 | 1450 | device->dev.parent = &device->parent->dev; |
1890a97a | 1451 | device->dev.bus = &acpi_bus_type; |
82c7d5ef | 1452 | device->dev.release = release; |
cf860be6 | 1453 | result = device_add(&device->dev); |
0c526d96 | 1454 | if (result) { |
8b12b922 | 1455 | dev_err(&device->dev, "Error registering device\n"); |
d43e167d | 1456 | goto err; |
1da177e4 | 1457 | } |
1da177e4 | 1458 | |
e49bd2dd | 1459 | result = acpi_device_setup_files(device); |
0c526d96 | 1460 | if (result) |
0794469d KS |
1461 | printk(KERN_ERR PREFIX "Error creating sysfs interface for device %s\n", |
1462 | dev_name(&device->dev)); | |
1da177e4 | 1463 | |
1da177e4 | 1464 | return 0; |
d43e167d RW |
1465 | |
1466 | err: | |
9090589d | 1467 | mutex_lock(&acpi_device_lock); |
33b57150 | 1468 | if (device->parent) |
e49bd2dd | 1469 | list_del(&device->node); |
e49bd2dd | 1470 | list_del(&device->wakeup_list); |
9090589d | 1471 | mutex_unlock(&acpi_device_lock); |
d43e167d RW |
1472 | |
1473 | err_detach: | |
d783156e | 1474 | acpi_detach_data(device->handle, acpi_scan_drop_device); |
e49bd2dd | 1475 | return result; |
1da177e4 LT |
1476 | } |
1477 | ||
8a0662d9 RW |
1478 | struct acpi_device *acpi_get_next_child(struct device *dev, |
1479 | struct acpi_device *child) | |
1480 | { | |
1481 | struct acpi_device *adev = ACPI_COMPANION(dev); | |
1482 | struct list_head *head, *next; | |
1483 | ||
1484 | if (!adev) | |
1485 | return NULL; | |
1486 | ||
1487 | head = &adev->children; | |
1488 | if (list_empty(head)) | |
1489 | return NULL; | |
1490 | ||
1491 | if (!child) | |
1492 | return list_first_entry(head, struct acpi_device, node); | |
1493 | ||
1494 | next = child->node.next; | |
1495 | return next == head ? NULL : list_entry(next, struct acpi_device, node); | |
1496 | } | |
1497 | ||
9e89dde2 ZR |
1498 | /* -------------------------------------------------------------------------- |
1499 | Driver Management | |
1500 | -------------------------------------------------------------------------- */ | |
9e89dde2 ZR |
1501 | /** |
1502 | * acpi_bus_register_driver - register a driver with the ACPI bus | |
1503 | * @driver: driver being registered | |
1504 | * | |
1505 | * Registers a driver with the ACPI bus. Searches the namespace for all | |
1506 | * devices that match the driver's criteria and binds. Returns zero for | |
1507 | * success or a negative error status for failure. | |
1508 | */ | |
1509 | int acpi_bus_register_driver(struct acpi_driver *driver) | |
1da177e4 | 1510 | { |
1890a97a | 1511 | int ret; |
1da177e4 | 1512 | |
9e89dde2 ZR |
1513 | if (acpi_disabled) |
1514 | return -ENODEV; | |
1890a97a PM |
1515 | driver->drv.name = driver->name; |
1516 | driver->drv.bus = &acpi_bus_type; | |
1517 | driver->drv.owner = driver->owner; | |
1da177e4 | 1518 | |
1890a97a PM |
1519 | ret = driver_register(&driver->drv); |
1520 | return ret; | |
9e89dde2 | 1521 | } |
1da177e4 | 1522 | |
9e89dde2 ZR |
1523 | EXPORT_SYMBOL(acpi_bus_register_driver); |
1524 | ||
1525 | /** | |
b27b14ce | 1526 | * acpi_bus_unregister_driver - unregisters a driver with the ACPI bus |
9e89dde2 ZR |
1527 | * @driver: driver to unregister |
1528 | * | |
1529 | * Unregisters a driver with the ACPI bus. Searches the namespace for all | |
1530 | * devices that match the driver's criteria and unbinds. | |
1531 | */ | |
1532 | void acpi_bus_unregister_driver(struct acpi_driver *driver) | |
1533 | { | |
1890a97a | 1534 | driver_unregister(&driver->drv); |
9e89dde2 ZR |
1535 | } |
1536 | ||
1537 | EXPORT_SYMBOL(acpi_bus_unregister_driver); | |
1538 | ||
9e89dde2 ZR |
1539 | /* -------------------------------------------------------------------------- |
1540 | Device Enumeration | |
1541 | -------------------------------------------------------------------------- */ | |
5c478f49 BH |
1542 | static struct acpi_device *acpi_bus_get_parent(acpi_handle handle) |
1543 | { | |
456de893 | 1544 | struct acpi_device *device = NULL; |
5c478f49 | 1545 | acpi_status status; |
5c478f49 BH |
1546 | |
1547 | /* | |
1548 | * Fixed hardware devices do not appear in the namespace and do not | |
1549 | * have handles, but we fabricate acpi_devices for them, so we have | |
1550 | * to deal with them specially. | |
1551 | */ | |
456de893 | 1552 | if (!handle) |
5c478f49 BH |
1553 | return acpi_root; |
1554 | ||
1555 | do { | |
1556 | status = acpi_get_parent(handle, &handle); | |
5c478f49 | 1557 | if (ACPI_FAILURE(status)) |
456de893 RW |
1558 | return status == AE_NULL_ENTRY ? NULL : acpi_root; |
1559 | } while (acpi_bus_get_device(handle, &device)); | |
1560 | return device; | |
5c478f49 BH |
1561 | } |
1562 | ||
9e89dde2 ZR |
1563 | acpi_status |
1564 | acpi_bus_get_ejd(acpi_handle handle, acpi_handle *ejd) | |
1565 | { | |
1566 | acpi_status status; | |
1567 | acpi_handle tmp; | |
1568 | struct acpi_buffer buffer = {ACPI_ALLOCATE_BUFFER, NULL}; | |
1569 | union acpi_object *obj; | |
1570 | ||
1571 | status = acpi_get_handle(handle, "_EJD", &tmp); | |
1572 | if (ACPI_FAILURE(status)) | |
1573 | return status; | |
1574 | ||
1575 | status = acpi_evaluate_object(handle, "_EJD", NULL, &buffer); | |
1576 | if (ACPI_SUCCESS(status)) { | |
1577 | obj = buffer.pointer; | |
3b5fee59 HM |
1578 | status = acpi_get_handle(ACPI_ROOT_OBJECT, obj->string.pointer, |
1579 | ejd); | |
9e89dde2 ZR |
1580 | kfree(buffer.pointer); |
1581 | } | |
1582 | return status; | |
1583 | } | |
1584 | EXPORT_SYMBOL_GPL(acpi_bus_get_ejd); | |
1585 | ||
e88c9c60 RW |
1586 | static int acpi_bus_extract_wakeup_device_power_package(acpi_handle handle, |
1587 | struct acpi_device_wakeup *wakeup) | |
9e89dde2 | 1588 | { |
b581a7f9 RW |
1589 | struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; |
1590 | union acpi_object *package = NULL; | |
9e89dde2 | 1591 | union acpi_object *element = NULL; |
b581a7f9 | 1592 | acpi_status status; |
e88c9c60 | 1593 | int err = -ENODATA; |
9e89dde2 | 1594 | |
b581a7f9 | 1595 | if (!wakeup) |
e88c9c60 | 1596 | return -EINVAL; |
9e89dde2 | 1597 | |
993cbe59 | 1598 | INIT_LIST_HEAD(&wakeup->resources); |
9e89dde2 | 1599 | |
b581a7f9 RW |
1600 | /* _PRW */ |
1601 | status = acpi_evaluate_object(handle, "_PRW", NULL, &buffer); | |
1602 | if (ACPI_FAILURE(status)) { | |
1603 | ACPI_EXCEPTION((AE_INFO, status, "Evaluating _PRW")); | |
e88c9c60 | 1604 | return err; |
b581a7f9 RW |
1605 | } |
1606 | ||
1607 | package = (union acpi_object *)buffer.pointer; | |
1608 | ||
e88c9c60 | 1609 | if (!package || package->package.count < 2) |
b581a7f9 | 1610 | goto out; |
b581a7f9 | 1611 | |
9e89dde2 | 1612 | element = &(package->package.elements[0]); |
e88c9c60 | 1613 | if (!element) |
b581a7f9 | 1614 | goto out; |
e88c9c60 | 1615 | |
9e89dde2 ZR |
1616 | if (element->type == ACPI_TYPE_PACKAGE) { |
1617 | if ((element->package.count < 2) || | |
1618 | (element->package.elements[0].type != | |
1619 | ACPI_TYPE_LOCAL_REFERENCE) | |
e88c9c60 | 1620 | || (element->package.elements[1].type != ACPI_TYPE_INTEGER)) |
b581a7f9 | 1621 | goto out; |
e88c9c60 | 1622 | |
b581a7f9 | 1623 | wakeup->gpe_device = |
9e89dde2 | 1624 | element->package.elements[0].reference.handle; |
b581a7f9 | 1625 | wakeup->gpe_number = |
9e89dde2 ZR |
1626 | (u32) element->package.elements[1].integer.value; |
1627 | } else if (element->type == ACPI_TYPE_INTEGER) { | |
b581a7f9 RW |
1628 | wakeup->gpe_device = NULL; |
1629 | wakeup->gpe_number = element->integer.value; | |
1630 | } else { | |
b581a7f9 RW |
1631 | goto out; |
1632 | } | |
9e89dde2 ZR |
1633 | |
1634 | element = &(package->package.elements[1]); | |
e88c9c60 | 1635 | if (element->type != ACPI_TYPE_INTEGER) |
b581a7f9 | 1636 | goto out; |
e88c9c60 | 1637 | |
b581a7f9 | 1638 | wakeup->sleep_state = element->integer.value; |
9e89dde2 | 1639 | |
e88c9c60 RW |
1640 | err = acpi_extract_power_resources(package, 2, &wakeup->resources); |
1641 | if (err) | |
b581a7f9 | 1642 | goto out; |
9e89dde2 | 1643 | |
0596a52b RW |
1644 | if (!list_empty(&wakeup->resources)) { |
1645 | int sleep_state; | |
9e89dde2 | 1646 | |
b5d667eb RW |
1647 | err = acpi_power_wakeup_list_init(&wakeup->resources, |
1648 | &sleep_state); | |
1649 | if (err) { | |
1650 | acpi_handle_warn(handle, "Retrieving current states " | |
1651 | "of wakeup power resources failed\n"); | |
1652 | acpi_power_resources_list_free(&wakeup->resources); | |
1653 | goto out; | |
1654 | } | |
0596a52b RW |
1655 | if (sleep_state < wakeup->sleep_state) { |
1656 | acpi_handle_warn(handle, "Overriding _PRW sleep state " | |
1657 | "(S%d) by S%d from power resources\n", | |
1658 | (int)wakeup->sleep_state, sleep_state); | |
1659 | wakeup->sleep_state = sleep_state; | |
1660 | } | |
1661 | } | |
9874647b | 1662 | |
b581a7f9 RW |
1663 | out: |
1664 | kfree(buffer.pointer); | |
e88c9c60 | 1665 | return err; |
1da177e4 LT |
1666 | } |
1667 | ||
bd9b2f9a | 1668 | static void acpi_wakeup_gpe_init(struct acpi_device *device) |
1da177e4 | 1669 | { |
29b71a1c | 1670 | struct acpi_device_id button_device_ids[] = { |
29b71a1c | 1671 | {"PNP0C0C", 0}, |
b7e38304 | 1672 | {"PNP0C0D", 0}, |
29b71a1c TR |
1673 | {"PNP0C0E", 0}, |
1674 | {"", 0}, | |
1675 | }; | |
bd9b2f9a | 1676 | struct acpi_device_wakeup *wakeup = &device->wakeup; |
f517709d RW |
1677 | acpi_status status; |
1678 | acpi_event_status event_status; | |
1679 | ||
bd9b2f9a | 1680 | wakeup->flags.notifier_present = 0; |
f517709d RW |
1681 | |
1682 | /* Power button, Lid switch always enable wakeup */ | |
1683 | if (!acpi_match_device_ids(device, button_device_ids)) { | |
bd9b2f9a | 1684 | wakeup->flags.run_wake = 1; |
b7e38304 ZR |
1685 | if (!acpi_match_device_ids(device, &button_device_ids[1])) { |
1686 | /* Do not use Lid/sleep button for S5 wakeup */ | |
bd9b2f9a RW |
1687 | if (wakeup->sleep_state == ACPI_STATE_S5) |
1688 | wakeup->sleep_state = ACPI_STATE_S4; | |
b7e38304 | 1689 | } |
bd9b2f9a | 1690 | acpi_mark_gpe_for_wake(wakeup->gpe_device, wakeup->gpe_number); |
f2b56bc8 | 1691 | device_set_wakeup_capable(&device->dev, true); |
f517709d RW |
1692 | return; |
1693 | } | |
1694 | ||
bd9b2f9a RW |
1695 | acpi_setup_gpe_for_wake(device->handle, wakeup->gpe_device, |
1696 | wakeup->gpe_number); | |
1697 | status = acpi_get_gpe_status(wakeup->gpe_device, wakeup->gpe_number, | |
1698 | &event_status); | |
1699 | if (ACPI_FAILURE(status)) | |
1700 | return; | |
1701 | ||
2f857234 | 1702 | wakeup->flags.run_wake = !!(event_status & ACPI_EVENT_FLAG_HAS_HANDLER); |
f517709d RW |
1703 | } |
1704 | ||
d57d09a4 | 1705 | static void acpi_bus_get_wakeup_device_flags(struct acpi_device *device) |
f517709d | 1706 | { |
e88c9c60 | 1707 | int err; |
29b71a1c | 1708 | |
d57d09a4 | 1709 | /* Presence of _PRW indicates wake capable */ |
952c63e9 | 1710 | if (!acpi_has_method(device->handle, "_PRW")) |
d57d09a4 RW |
1711 | return; |
1712 | ||
e88c9c60 RW |
1713 | err = acpi_bus_extract_wakeup_device_power_package(device->handle, |
1714 | &device->wakeup); | |
1715 | if (err) { | |
1716 | dev_err(&device->dev, "_PRW evaluation error: %d\n", err); | |
d57d09a4 | 1717 | return; |
9e89dde2 | 1718 | } |
1da177e4 | 1719 | |
9e89dde2 | 1720 | device->wakeup.flags.valid = 1; |
9b83ccd2 | 1721 | device->wakeup.prepare_count = 0; |
bd9b2f9a | 1722 | acpi_wakeup_gpe_init(device); |
729b2bdb ZY |
1723 | /* Call _PSW/_DSW object to disable its ability to wake the sleeping |
1724 | * system for the ACPI device with the _PRW object. | |
1725 | * The _PSW object is depreciated in ACPI 3.0 and is replaced by _DSW. | |
1726 | * So it is necessary to call _DSW object first. Only when it is not | |
1727 | * present will the _PSW object used. | |
1728 | */ | |
e88c9c60 RW |
1729 | err = acpi_device_sleep_wake(device, 0, 0, 0); |
1730 | if (err) | |
77e76609 RW |
1731 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
1732 | "error in _DSW or _PSW evaluation\n")); | |
1da177e4 | 1733 | } |
1da177e4 | 1734 | |
f33ce568 RW |
1735 | static void acpi_bus_init_power_state(struct acpi_device *device, int state) |
1736 | { | |
1737 | struct acpi_device_power_state *ps = &device->power.states[state]; | |
ef85bdbe RW |
1738 | char pathname[5] = { '_', 'P', 'R', '0' + state, '\0' }; |
1739 | struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; | |
f33ce568 | 1740 | acpi_status status; |
bf325f95 | 1741 | |
f33ce568 RW |
1742 | INIT_LIST_HEAD(&ps->resources); |
1743 | ||
ef85bdbe RW |
1744 | /* Evaluate "_PRx" to get referenced power resources */ |
1745 | status = acpi_evaluate_object(device->handle, pathname, NULL, &buffer); | |
1746 | if (ACPI_SUCCESS(status)) { | |
1747 | union acpi_object *package = buffer.pointer; | |
1748 | ||
1749 | if (buffer.length && package | |
1750 | && package->type == ACPI_TYPE_PACKAGE | |
1751 | && package->package.count) { | |
e88c9c60 RW |
1752 | int err = acpi_extract_power_resources(package, 0, |
1753 | &ps->resources); | |
1754 | if (!err) | |
ef85bdbe | 1755 | device->power.flags.power_resources = 1; |
f33ce568 | 1756 | } |
ef85bdbe | 1757 | ACPI_FREE(buffer.pointer); |
f33ce568 RW |
1758 | } |
1759 | ||
1760 | /* Evaluate "_PSx" to see if we can do explicit sets */ | |
ef85bdbe | 1761 | pathname[2] = 'S'; |
952c63e9 | 1762 | if (acpi_has_method(device->handle, pathname)) |
f33ce568 RW |
1763 | ps->flags.explicit_set = 1; |
1764 | ||
1765 | /* | |
1766 | * State is valid if there are means to put the device into it. | |
1767 | * D3hot is only valid if _PR3 present. | |
1768 | */ | |
ef85bdbe | 1769 | if (!list_empty(&ps->resources) |
f33ce568 RW |
1770 | || (ps->flags.explicit_set && state < ACPI_STATE_D3_HOT)) { |
1771 | ps->flags.valid = 1; | |
1772 | ps->flags.os_accessible = 1; | |
1773 | } | |
1774 | ||
1775 | ps->power = -1; /* Unknown - driver assigned */ | |
1776 | ps->latency = -1; /* Unknown - driver assigned */ | |
1777 | } | |
1778 | ||
d43e167d | 1779 | static void acpi_bus_get_power_flags(struct acpi_device *device) |
1da177e4 | 1780 | { |
8bc5053b | 1781 | u32 i; |
1a365616 | 1782 | |
d43e167d | 1783 | /* Presence of _PS0|_PR0 indicates 'power manageable' */ |
952c63e9 JL |
1784 | if (!acpi_has_method(device->handle, "_PS0") && |
1785 | !acpi_has_method(device->handle, "_PR0")) | |
1786 | return; | |
1a365616 | 1787 | |
d43e167d | 1788 | device->flags.power_manageable = 1; |
4be44fcd | 1789 | |
9e89dde2 ZR |
1790 | /* |
1791 | * Power Management Flags | |
1792 | */ | |
952c63e9 | 1793 | if (acpi_has_method(device->handle, "_PSC")) |
9e89dde2 | 1794 | device->power.flags.explicit_get = 1; |
f25c0ae2 | 1795 | |
952c63e9 | 1796 | if (acpi_has_method(device->handle, "_IRC")) |
9e89dde2 | 1797 | device->power.flags.inrush_current = 1; |
1da177e4 | 1798 | |
f25c0ae2 RW |
1799 | if (acpi_has_method(device->handle, "_DSW")) |
1800 | device->power.flags.dsw_present = 1; | |
1801 | ||
9e89dde2 ZR |
1802 | /* |
1803 | * Enumerate supported power management states | |
1804 | */ | |
f33ce568 RW |
1805 | for (i = ACPI_STATE_D0; i <= ACPI_STATE_D3_HOT; i++) |
1806 | acpi_bus_init_power_state(device, i); | |
bf325f95 | 1807 | |
0b224527 | 1808 | INIT_LIST_HEAD(&device->power.states[ACPI_STATE_D3_COLD].resources); |
1da177e4 | 1809 | |
9e89dde2 ZR |
1810 | /* Set defaults for D0 and D3 states (always valid) */ |
1811 | device->power.states[ACPI_STATE_D0].flags.valid = 1; | |
1812 | device->power.states[ACPI_STATE_D0].power = 100; | |
8ad928d5 RW |
1813 | device->power.states[ACPI_STATE_D3_COLD].flags.valid = 1; |
1814 | device->power.states[ACPI_STATE_D3_COLD].power = 0; | |
c8f7a62c | 1815 | |
5c7dd710 RW |
1816 | /* Set D3cold's explicit_set flag if _PS3 exists. */ |
1817 | if (device->power.states[ACPI_STATE_D3_HOT].flags.explicit_set) | |
1818 | device->power.states[ACPI_STATE_D3_COLD].flags.explicit_set = 1; | |
1819 | ||
1399dfcd AL |
1820 | /* Presence of _PS3 or _PRx means we can put the device into D3 cold */ |
1821 | if (device->power.states[ACPI_STATE_D3_HOT].flags.explicit_set || | |
1822 | device->power.flags.power_resources) | |
1823 | device->power.states[ACPI_STATE_D3_COLD].flags.os_accessible = 1; | |
1824 | ||
1b1f3e16 | 1825 | if (acpi_bus_init_power(device)) |
b3785492 | 1826 | device->flags.power_manageable = 0; |
9e89dde2 | 1827 | } |
c8f7a62c | 1828 | |
d43e167d | 1829 | static void acpi_bus_get_flags(struct acpi_device *device) |
1da177e4 | 1830 | { |
1da177e4 | 1831 | /* Presence of _STA indicates 'dynamic_status' */ |
952c63e9 | 1832 | if (acpi_has_method(device->handle, "_STA")) |
1da177e4 LT |
1833 | device->flags.dynamic_status = 1; |
1834 | ||
1da177e4 | 1835 | /* Presence of _RMV indicates 'removable' */ |
952c63e9 | 1836 | if (acpi_has_method(device->handle, "_RMV")) |
1da177e4 LT |
1837 | device->flags.removable = 1; |
1838 | ||
1839 | /* Presence of _EJD|_EJ0 indicates 'ejectable' */ | |
952c63e9 JL |
1840 | if (acpi_has_method(device->handle, "_EJD") || |
1841 | acpi_has_method(device->handle, "_EJ0")) | |
1da177e4 | 1842 | device->flags.ejectable = 1; |
1da177e4 LT |
1843 | } |
1844 | ||
c7bcb4e9 | 1845 | static void acpi_device_get_busid(struct acpi_device *device) |
1da177e4 | 1846 | { |
4be44fcd LB |
1847 | char bus_id[5] = { '?', 0 }; |
1848 | struct acpi_buffer buffer = { sizeof(bus_id), bus_id }; | |
1849 | int i = 0; | |
1da177e4 LT |
1850 | |
1851 | /* | |
1852 | * Bus ID | |
1853 | * ------ | |
1854 | * The device's Bus ID is simply the object name. | |
1855 | * TBD: Shouldn't this value be unique (within the ACPI namespace)? | |
1856 | */ | |
859ac9a4 | 1857 | if (ACPI_IS_ROOT_DEVICE(device)) { |
1da177e4 | 1858 | strcpy(device->pnp.bus_id, "ACPI"); |
859ac9a4 BH |
1859 | return; |
1860 | } | |
1861 | ||
1862 | switch (device->device_type) { | |
1da177e4 LT |
1863 | case ACPI_BUS_TYPE_POWER_BUTTON: |
1864 | strcpy(device->pnp.bus_id, "PWRF"); | |
1865 | break; | |
1866 | case ACPI_BUS_TYPE_SLEEP_BUTTON: | |
1867 | strcpy(device->pnp.bus_id, "SLPF"); | |
1868 | break; | |
1869 | default: | |
66b7ed40 | 1870 | acpi_get_name(device->handle, ACPI_SINGLE_NAME, &buffer); |
1da177e4 LT |
1871 | /* Clean up trailing underscores (if any) */ |
1872 | for (i = 3; i > 1; i--) { | |
1873 | if (bus_id[i] == '_') | |
1874 | bus_id[i] = '\0'; | |
1875 | else | |
1876 | break; | |
1877 | } | |
1878 | strcpy(device->pnp.bus_id, bus_id); | |
1879 | break; | |
1880 | } | |
1881 | } | |
1882 | ||
ebf4df8d JL |
1883 | /* |
1884 | * acpi_ata_match - see if an acpi object is an ATA device | |
1885 | * | |
1886 | * If an acpi object has one of the ACPI ATA methods defined, | |
1887 | * then we can safely call it an ATA device. | |
1888 | */ | |
1889 | bool acpi_ata_match(acpi_handle handle) | |
1890 | { | |
1891 | return acpi_has_method(handle, "_GTF") || | |
1892 | acpi_has_method(handle, "_GTM") || | |
1893 | acpi_has_method(handle, "_STM") || | |
1894 | acpi_has_method(handle, "_SDD"); | |
1895 | } | |
1896 | ||
54735266 | 1897 | /* |
d4e1a692 | 1898 | * acpi_bay_match - see if an acpi object is an ejectable driver bay |
54735266 ZR |
1899 | * |
1900 | * If an acpi object is ejectable and has one of the ACPI ATA methods defined, | |
1901 | * then we can safely call it an ejectable drive bay | |
1902 | */ | |
ebf4df8d | 1903 | bool acpi_bay_match(acpi_handle handle) |
d4e1a692 | 1904 | { |
54735266 ZR |
1905 | acpi_handle phandle; |
1906 | ||
952c63e9 | 1907 | if (!acpi_has_method(handle, "_EJ0")) |
ebf4df8d JL |
1908 | return false; |
1909 | if (acpi_ata_match(handle)) | |
1910 | return true; | |
1911 | if (ACPI_FAILURE(acpi_get_parent(handle, &phandle))) | |
1912 | return false; | |
54735266 | 1913 | |
ebf4df8d | 1914 | return acpi_ata_match(phandle); |
54735266 ZR |
1915 | } |
1916 | ||
b43109fa | 1917 | bool acpi_device_is_battery(struct acpi_device *adev) |
1e2380cd | 1918 | { |
b43109fa | 1919 | struct acpi_hardware_id *hwid; |
1e2380cd | 1920 | |
b43109fa RW |
1921 | list_for_each_entry(hwid, &adev->pnp.ids, list) |
1922 | if (!strcmp("PNP0C0A", hwid->id)) | |
1923 | return true; | |
1e2380cd | 1924 | |
b43109fa | 1925 | return false; |
1e2380cd RW |
1926 | } |
1927 | ||
b43109fa | 1928 | static bool is_ejectable_bay(struct acpi_device *adev) |
1e2380cd | 1929 | { |
b43109fa RW |
1930 | acpi_handle handle = adev->handle; |
1931 | ||
1932 | if (acpi_has_method(handle, "_EJ0") && acpi_device_is_battery(adev)) | |
1e2380cd RW |
1933 | return true; |
1934 | ||
1935 | return acpi_bay_match(handle); | |
1936 | } | |
1937 | ||
3620f2f2 | 1938 | /* |
d4e1a692 | 1939 | * acpi_dock_match - see if an acpi object has a _DCK method |
3620f2f2 | 1940 | */ |
ebf4df8d | 1941 | bool acpi_dock_match(acpi_handle handle) |
3620f2f2 | 1942 | { |
ebf4df8d | 1943 | return acpi_has_method(handle, "_DCK"); |
3620f2f2 FS |
1944 | } |
1945 | ||
620e112c | 1946 | const char *acpi_device_hid(struct acpi_device *device) |
15b8dd53 | 1947 | { |
7f47fa6c | 1948 | struct acpi_hardware_id *hid; |
15b8dd53 | 1949 | |
2b2ae7c7 TR |
1950 | if (list_empty(&device->pnp.ids)) |
1951 | return dummy_hid; | |
1952 | ||
7f47fa6c BH |
1953 | hid = list_first_entry(&device->pnp.ids, struct acpi_hardware_id, list); |
1954 | return hid->id; | |
1955 | } | |
1956 | EXPORT_SYMBOL(acpi_device_hid); | |
15b8dd53 | 1957 | |
d4e1a692 | 1958 | static void acpi_add_id(struct acpi_device_pnp *pnp, const char *dev_id) |
7f47fa6c BH |
1959 | { |
1960 | struct acpi_hardware_id *id; | |
15b8dd53 | 1961 | |
7f47fa6c BH |
1962 | id = kmalloc(sizeof(*id), GFP_KERNEL); |
1963 | if (!id) | |
1964 | return; | |
15b8dd53 | 1965 | |
581de59e | 1966 | id->id = kstrdup(dev_id, GFP_KERNEL); |
7f47fa6c BH |
1967 | if (!id->id) { |
1968 | kfree(id); | |
1969 | return; | |
15b8dd53 BM |
1970 | } |
1971 | ||
d4e1a692 TK |
1972 | list_add_tail(&id->list, &pnp->ids); |
1973 | pnp->type.hardware_id = 1; | |
15b8dd53 BM |
1974 | } |
1975 | ||
222e82ac DW |
1976 | /* |
1977 | * Old IBM workstations have a DSDT bug wherein the SMBus object | |
1978 | * lacks the SMBUS01 HID and the methods do not have the necessary "_" | |
1979 | * prefix. Work around this. | |
1980 | */ | |
ebf4df8d | 1981 | static bool acpi_ibm_smbus_match(acpi_handle handle) |
222e82ac | 1982 | { |
ebf4df8d JL |
1983 | char node_name[ACPI_PATH_SEGMENT_LENGTH]; |
1984 | struct acpi_buffer path = { sizeof(node_name), node_name }; | |
222e82ac DW |
1985 | |
1986 | if (!dmi_name_in_vendors("IBM")) | |
ebf4df8d | 1987 | return false; |
222e82ac DW |
1988 | |
1989 | /* Look for SMBS object */ | |
ebf4df8d JL |
1990 | if (ACPI_FAILURE(acpi_get_name(handle, ACPI_SINGLE_NAME, &path)) || |
1991 | strcmp("SMBS", path.pointer)) | |
1992 | return false; | |
222e82ac DW |
1993 | |
1994 | /* Does it have the necessary (but misnamed) methods? */ | |
952c63e9 JL |
1995 | if (acpi_has_method(handle, "SBI") && |
1996 | acpi_has_method(handle, "SBR") && | |
1997 | acpi_has_method(handle, "SBW")) | |
ebf4df8d JL |
1998 | return true; |
1999 | ||
2000 | return false; | |
222e82ac DW |
2001 | } |
2002 | ||
ae3caa80 JL |
2003 | static bool acpi_object_is_system_bus(acpi_handle handle) |
2004 | { | |
2005 | acpi_handle tmp; | |
2006 | ||
2007 | if (ACPI_SUCCESS(acpi_get_handle(NULL, "\\_SB", &tmp)) && | |
2008 | tmp == handle) | |
2009 | return true; | |
2010 | if (ACPI_SUCCESS(acpi_get_handle(NULL, "\\_TZ", &tmp)) && | |
2011 | tmp == handle) | |
2012 | return true; | |
2013 | ||
2014 | return false; | |
2015 | } | |
2016 | ||
c0af4175 TK |
2017 | static void acpi_set_pnp_ids(acpi_handle handle, struct acpi_device_pnp *pnp, |
2018 | int device_type) | |
1da177e4 | 2019 | { |
4be44fcd | 2020 | acpi_status status; |
57f3674f | 2021 | struct acpi_device_info *info; |
78e25fef | 2022 | struct acpi_pnp_device_id_list *cid_list; |
7f47fa6c | 2023 | int i; |
1da177e4 | 2024 | |
c0af4175 | 2025 | switch (device_type) { |
1da177e4 | 2026 | case ACPI_BUS_TYPE_DEVICE: |
c0af4175 TK |
2027 | if (handle == ACPI_ROOT_OBJECT) { |
2028 | acpi_add_id(pnp, ACPI_SYSTEM_HID); | |
859ac9a4 BH |
2029 | break; |
2030 | } | |
2031 | ||
c0af4175 | 2032 | status = acpi_get_object_info(handle, &info); |
1da177e4 | 2033 | if (ACPI_FAILURE(status)) { |
c0af4175 TK |
2034 | pr_err(PREFIX "%s: Error reading device info\n", |
2035 | __func__); | |
1da177e4 LT |
2036 | return; |
2037 | } | |
2038 | ||
549e6845 | 2039 | if (info->valid & ACPI_VALID_HID) { |
c0af4175 | 2040 | acpi_add_id(pnp, info->hardware_id.string); |
549e6845 RW |
2041 | pnp->type.platform_id = 1; |
2042 | } | |
57f3674f | 2043 | if (info->valid & ACPI_VALID_CID) { |
15b8dd53 | 2044 | cid_list = &info->compatible_id_list; |
57f3674f | 2045 | for (i = 0; i < cid_list->count; i++) |
c0af4175 | 2046 | acpi_add_id(pnp, cid_list->ids[i].string); |
57f3674f | 2047 | } |
1da177e4 | 2048 | if (info->valid & ACPI_VALID_ADR) { |
c0af4175 TK |
2049 | pnp->bus_address = info->address; |
2050 | pnp->type.bus_address = 1; | |
1da177e4 | 2051 | } |
ccf78040 | 2052 | if (info->valid & ACPI_VALID_UID) |
c0af4175 | 2053 | pnp->unique_id = kstrdup(info->unique_id.string, |
ccf78040 | 2054 | GFP_KERNEL); |
ae843332 | 2055 | |
a83893ae BH |
2056 | kfree(info); |
2057 | ||
57f3674f BH |
2058 | /* |
2059 | * Some devices don't reliably have _HIDs & _CIDs, so add | |
2060 | * synthetic HIDs to make sure drivers can find them. | |
2061 | */ | |
c0af4175 TK |
2062 | if (acpi_is_video_device(handle)) |
2063 | acpi_add_id(pnp, ACPI_VIDEO_HID); | |
ebf4df8d | 2064 | else if (acpi_bay_match(handle)) |
c0af4175 | 2065 | acpi_add_id(pnp, ACPI_BAY_HID); |
ebf4df8d | 2066 | else if (acpi_dock_match(handle)) |
c0af4175 | 2067 | acpi_add_id(pnp, ACPI_DOCK_HID); |
ebf4df8d | 2068 | else if (acpi_ibm_smbus_match(handle)) |
c0af4175 | 2069 | acpi_add_id(pnp, ACPI_SMBUS_IBM_HID); |
ae3caa80 JL |
2070 | else if (list_empty(&pnp->ids) && |
2071 | acpi_object_is_system_bus(handle)) { | |
2072 | /* \_SB, \_TZ, LNXSYBUS */ | |
2073 | acpi_add_id(pnp, ACPI_BUS_HID); | |
c0af4175 TK |
2074 | strcpy(pnp->device_name, ACPI_BUS_DEVICE_NAME); |
2075 | strcpy(pnp->device_class, ACPI_BUS_CLASS); | |
b7b30de5 | 2076 | } |
54735266 | 2077 | |
1da177e4 LT |
2078 | break; |
2079 | case ACPI_BUS_TYPE_POWER: | |
c0af4175 | 2080 | acpi_add_id(pnp, ACPI_POWER_HID); |
1da177e4 LT |
2081 | break; |
2082 | case ACPI_BUS_TYPE_PROCESSOR: | |
c0af4175 | 2083 | acpi_add_id(pnp, ACPI_PROCESSOR_OBJECT_HID); |
1da177e4 | 2084 | break; |
1da177e4 | 2085 | case ACPI_BUS_TYPE_THERMAL: |
c0af4175 | 2086 | acpi_add_id(pnp, ACPI_THERMAL_HID); |
1da177e4 LT |
2087 | break; |
2088 | case ACPI_BUS_TYPE_POWER_BUTTON: | |
c0af4175 | 2089 | acpi_add_id(pnp, ACPI_BUTTON_HID_POWERF); |
1da177e4 LT |
2090 | break; |
2091 | case ACPI_BUS_TYPE_SLEEP_BUTTON: | |
c0af4175 | 2092 | acpi_add_id(pnp, ACPI_BUTTON_HID_SLEEPF); |
1da177e4 LT |
2093 | break; |
2094 | } | |
1da177e4 LT |
2095 | } |
2096 | ||
c0af4175 TK |
2097 | void acpi_free_pnp_ids(struct acpi_device_pnp *pnp) |
2098 | { | |
2099 | struct acpi_hardware_id *id, *tmp; | |
2100 | ||
2101 | list_for_each_entry_safe(id, tmp, &pnp->ids, list) { | |
2102 | kfree(id->id); | |
2103 | kfree(id); | |
2104 | } | |
2105 | kfree(pnp->unique_id); | |
2106 | } | |
2107 | ||
82c7d5ef RW |
2108 | void acpi_init_device_object(struct acpi_device *device, acpi_handle handle, |
2109 | int type, unsigned long long sta) | |
1da177e4 | 2110 | { |
d43e167d RW |
2111 | INIT_LIST_HEAD(&device->pnp.ids); |
2112 | device->device_type = type; | |
2113 | device->handle = handle; | |
2114 | device->parent = acpi_bus_get_parent(handle); | |
8a0662d9 | 2115 | device->fwnode.type = FWNODE_ACPI; |
25db115b | 2116 | acpi_set_device_status(device, sta); |
d43e167d | 2117 | acpi_device_get_busid(device); |
c0af4175 | 2118 | acpi_set_pnp_ids(handle, &device->pnp, type); |
ffdcd955 | 2119 | acpi_init_properties(device); |
d43e167d | 2120 | acpi_bus_get_flags(device); |
2c0d4fe0 | 2121 | device->flags.match_driver = false; |
202317a5 RW |
2122 | device->flags.initialized = true; |
2123 | device->flags.visited = false; | |
cf860be6 RW |
2124 | device_initialize(&device->dev); |
2125 | dev_set_uevent_suppress(&device->dev, true); | |
2126 | } | |
bc3b0772 | 2127 | |
cf860be6 RW |
2128 | void acpi_device_add_finalize(struct acpi_device *device) |
2129 | { | |
2130 | dev_set_uevent_suppress(&device->dev, false); | |
2131 | kobject_uevent(&device->dev.kobj, KOBJ_ADD); | |
1da177e4 LT |
2132 | } |
2133 | ||
5c478f49 BH |
2134 | static int acpi_add_single_object(struct acpi_device **child, |
2135 | acpi_handle handle, int type, | |
2c0d4fe0 | 2136 | unsigned long long sta) |
1da177e4 | 2137 | { |
77c24888 BH |
2138 | int result; |
2139 | struct acpi_device *device; | |
29aaefa6 | 2140 | struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; |
1da177e4 | 2141 | |
36bcbec7 | 2142 | device = kzalloc(sizeof(struct acpi_device), GFP_KERNEL); |
1da177e4 | 2143 | if (!device) { |
6468463a | 2144 | printk(KERN_ERR PREFIX "Memory allocation error\n"); |
d550d98d | 2145 | return -ENOMEM; |
1da177e4 | 2146 | } |
1da177e4 | 2147 | |
d43e167d RW |
2148 | acpi_init_device_object(device, handle, type, sta); |
2149 | acpi_bus_get_power_flags(device); | |
d57d09a4 | 2150 | acpi_bus_get_wakeup_device_flags(device); |
1da177e4 | 2151 | |
cf860be6 | 2152 | result = acpi_device_add(device, acpi_device_release); |
d43e167d | 2153 | if (result) { |
718fb0de | 2154 | acpi_device_release(&device->dev); |
d43e167d RW |
2155 | return result; |
2156 | } | |
1da177e4 | 2157 | |
d43e167d | 2158 | acpi_power_add_remove_device(device, true); |
cf860be6 | 2159 | acpi_device_add_finalize(device); |
d43e167d RW |
2160 | acpi_get_name(handle, ACPI_FULL_PATHNAME, &buffer); |
2161 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Added %s [%s] parent %s\n", | |
2162 | dev_name(&device->dev), (char *) buffer.pointer, | |
2163 | device->parent ? dev_name(&device->parent->dev) : "(null)")); | |
2164 | kfree(buffer.pointer); | |
2165 | *child = device; | |
2166 | return 0; | |
bf325f95 RW |
2167 | } |
2168 | ||
778cbc1d BH |
2169 | static int acpi_bus_type_and_status(acpi_handle handle, int *type, |
2170 | unsigned long long *sta) | |
1da177e4 | 2171 | { |
778cbc1d BH |
2172 | acpi_status status; |
2173 | acpi_object_type acpi_type; | |
1da177e4 | 2174 | |
778cbc1d | 2175 | status = acpi_get_type(handle, &acpi_type); |
51a85faf | 2176 | if (ACPI_FAILURE(status)) |
778cbc1d | 2177 | return -ENODEV; |
4be44fcd | 2178 | |
778cbc1d | 2179 | switch (acpi_type) { |
51a85faf BH |
2180 | case ACPI_TYPE_ANY: /* for ACPI_ROOT_OBJECT */ |
2181 | case ACPI_TYPE_DEVICE: | |
778cbc1d BH |
2182 | *type = ACPI_BUS_TYPE_DEVICE; |
2183 | status = acpi_bus_get_status_handle(handle, sta); | |
2184 | if (ACPI_FAILURE(status)) | |
2185 | return -ENODEV; | |
51a85faf BH |
2186 | break; |
2187 | case ACPI_TYPE_PROCESSOR: | |
778cbc1d BH |
2188 | *type = ACPI_BUS_TYPE_PROCESSOR; |
2189 | status = acpi_bus_get_status_handle(handle, sta); | |
2190 | if (ACPI_FAILURE(status)) | |
2191 | return -ENODEV; | |
51a85faf BH |
2192 | break; |
2193 | case ACPI_TYPE_THERMAL: | |
778cbc1d BH |
2194 | *type = ACPI_BUS_TYPE_THERMAL; |
2195 | *sta = ACPI_STA_DEFAULT; | |
51a85faf BH |
2196 | break; |
2197 | case ACPI_TYPE_POWER: | |
778cbc1d BH |
2198 | *type = ACPI_BUS_TYPE_POWER; |
2199 | *sta = ACPI_STA_DEFAULT; | |
51a85faf BH |
2200 | break; |
2201 | default: | |
778cbc1d | 2202 | return -ENODEV; |
51a85faf | 2203 | } |
1da177e4 | 2204 | |
778cbc1d BH |
2205 | return 0; |
2206 | } | |
2207 | ||
202317a5 RW |
2208 | bool acpi_device_is_present(struct acpi_device *adev) |
2209 | { | |
2210 | if (adev->status.present || adev->status.functional) | |
2211 | return true; | |
2212 | ||
2213 | adev->flags.initialized = false; | |
2214 | return false; | |
2215 | } | |
2216 | ||
4b59cc1f RW |
2217 | static bool acpi_scan_handler_matching(struct acpi_scan_handler *handler, |
2218 | char *idstr, | |
2219 | const struct acpi_device_id **matchid) | |
2220 | { | |
2221 | const struct acpi_device_id *devid; | |
2222 | ||
aca0a4eb RW |
2223 | if (handler->match) |
2224 | return handler->match(idstr, matchid); | |
2225 | ||
4b59cc1f RW |
2226 | for (devid = handler->ids; devid->id[0]; devid++) |
2227 | if (!strcmp((char *)devid->id, idstr)) { | |
2228 | if (matchid) | |
2229 | *matchid = devid; | |
2230 | ||
2231 | return true; | |
2232 | } | |
2233 | ||
2234 | return false; | |
2235 | } | |
2236 | ||
6b772e8f TK |
2237 | static struct acpi_scan_handler *acpi_scan_match_handler(char *idstr, |
2238 | const struct acpi_device_id **matchid) | |
2239 | { | |
2240 | struct acpi_scan_handler *handler; | |
2241 | ||
2242 | list_for_each_entry(handler, &acpi_scan_handlers_list, list_node) | |
2243 | if (acpi_scan_handler_matching(handler, idstr, matchid)) | |
2244 | return handler; | |
2245 | ||
2246 | return NULL; | |
2247 | } | |
2248 | ||
3f8055c3 RW |
2249 | void acpi_scan_hotplug_enabled(struct acpi_hotplug_profile *hotplug, bool val) |
2250 | { | |
3f8055c3 RW |
2251 | if (!!hotplug->enabled == !!val) |
2252 | return; | |
2253 | ||
2254 | mutex_lock(&acpi_scan_lock); | |
2255 | ||
2256 | hotplug->enabled = val; | |
3f8055c3 RW |
2257 | |
2258 | mutex_unlock(&acpi_scan_lock); | |
2259 | } | |
2260 | ||
3c2cc7ff | 2261 | static void acpi_scan_init_hotplug(struct acpi_device *adev) |
a33ec399 | 2262 | { |
6b772e8f | 2263 | struct acpi_hardware_id *hwid; |
a33ec399 | 2264 | |
b43109fa | 2265 | if (acpi_dock_match(adev->handle) || is_ejectable_bay(adev)) { |
1e2380cd RW |
2266 | acpi_dock_add(adev); |
2267 | return; | |
2268 | } | |
3c2cc7ff RW |
2269 | list_for_each_entry(hwid, &adev->pnp.ids, list) { |
2270 | struct acpi_scan_handler *handler; | |
a33ec399 | 2271 | |
6b772e8f | 2272 | handler = acpi_scan_match_handler(hwid->id, NULL); |
1a699476 RW |
2273 | if (handler) { |
2274 | adev->flags.hotplug_notify = true; | |
2275 | break; | |
2276 | } | |
3c2cc7ff | 2277 | } |
a33ec399 RW |
2278 | } |
2279 | ||
40e7fcb1 LT |
2280 | static void acpi_device_dep_initialize(struct acpi_device *adev) |
2281 | { | |
2282 | struct acpi_dep_data *dep; | |
2283 | struct acpi_handle_list dep_devices; | |
2284 | acpi_status status; | |
2285 | int i; | |
2286 | ||
2287 | if (!acpi_has_method(adev->handle, "_DEP")) | |
2288 | return; | |
2289 | ||
2290 | status = acpi_evaluate_reference(adev->handle, "_DEP", NULL, | |
2291 | &dep_devices); | |
2292 | if (ACPI_FAILURE(status)) { | |
80167a24 | 2293 | dev_dbg(&adev->dev, "Failed to evaluate _DEP.\n"); |
40e7fcb1 LT |
2294 | return; |
2295 | } | |
2296 | ||
2297 | for (i = 0; i < dep_devices.count; i++) { | |
2298 | struct acpi_device_info *info; | |
2299 | int skip; | |
2300 | ||
2301 | status = acpi_get_object_info(dep_devices.handles[i], &info); | |
2302 | if (ACPI_FAILURE(status)) { | |
80167a24 | 2303 | dev_dbg(&adev->dev, "Error reading _DEP device info\n"); |
40e7fcb1 LT |
2304 | continue; |
2305 | } | |
2306 | ||
2307 | /* | |
2308 | * Skip the dependency of Windows System Power | |
2309 | * Management Controller | |
2310 | */ | |
2311 | skip = info->valid & ACPI_VALID_HID && | |
2312 | !strcmp(info->hardware_id.string, "INT3396"); | |
2313 | ||
2314 | kfree(info); | |
2315 | ||
2316 | if (skip) | |
2317 | continue; | |
2318 | ||
2319 | dep = kzalloc(sizeof(struct acpi_dep_data), GFP_KERNEL); | |
2320 | if (!dep) | |
2321 | return; | |
2322 | ||
2323 | dep->master = dep_devices.handles[i]; | |
2324 | dep->slave = adev->handle; | |
2325 | adev->dep_unmet++; | |
2326 | ||
2327 | mutex_lock(&acpi_dep_list_lock); | |
2328 | list_add_tail(&dep->node , &acpi_dep_list); | |
2329 | mutex_unlock(&acpi_dep_list_lock); | |
2330 | } | |
2331 | } | |
2332 | ||
e3863094 RW |
2333 | static acpi_status acpi_bus_check_add(acpi_handle handle, u32 lvl_not_used, |
2334 | void *not_used, void **return_value) | |
778cbc1d | 2335 | { |
805d410f | 2336 | struct acpi_device *device = NULL; |
778cbc1d BH |
2337 | int type; |
2338 | unsigned long long sta; | |
2339 | int result; | |
2340 | ||
4002bf38 RW |
2341 | acpi_bus_get_device(handle, &device); |
2342 | if (device) | |
2343 | goto out; | |
2344 | ||
778cbc1d BH |
2345 | result = acpi_bus_type_and_status(handle, &type, &sta); |
2346 | if (result) | |
2347 | return AE_OK; | |
2348 | ||
82c7d5ef RW |
2349 | if (type == ACPI_BUS_TYPE_POWER) { |
2350 | acpi_add_power_resource(handle); | |
2351 | return AE_OK; | |
2352 | } | |
2353 | ||
2c0d4fe0 | 2354 | acpi_add_single_object(&device, handle, type, sta); |
e3b87f8a | 2355 | if (!device) |
51a85faf | 2356 | return AE_CTRL_DEPTH; |
1da177e4 | 2357 | |
3c2cc7ff | 2358 | acpi_scan_init_hotplug(device); |
40e7fcb1 | 2359 | acpi_device_dep_initialize(device); |
3c2cc7ff | 2360 | |
4002bf38 | 2361 | out: |
51a85faf BH |
2362 | if (!*return_value) |
2363 | *return_value = device; | |
805d410f | 2364 | |
51a85faf BH |
2365 | return AE_OK; |
2366 | } | |
3fb02738 | 2367 | |
48459340 ZR |
2368 | static int acpi_check_spi_i2c_slave(struct acpi_resource *ares, void *data) |
2369 | { | |
2370 | bool *is_spi_i2c_slave_p = data; | |
2371 | ||
2372 | if (ares->type != ACPI_RESOURCE_TYPE_SERIAL_BUS) | |
2373 | return 1; | |
2374 | ||
2375 | /* | |
2376 | * devices that are connected to UART still need to be enumerated to | |
2377 | * platform bus | |
2378 | */ | |
2379 | if (ares->data.common_serial_bus.type != ACPI_RESOURCE_SERIAL_TYPE_UART) | |
2380 | *is_spi_i2c_slave_p = true; | |
2381 | ||
2382 | /* no need to do more checking */ | |
2383 | return -1; | |
2384 | } | |
2385 | ||
2386 | static void acpi_default_enumeration(struct acpi_device *device) | |
2387 | { | |
2388 | struct list_head resource_list; | |
2389 | bool is_spi_i2c_slave = false; | |
2390 | ||
2391 | if (!device->pnp.type.platform_id || device->handler) | |
2392 | return; | |
2393 | ||
2394 | /* | |
2395 | * Do not enemerate SPI/I2C slaves as they will be enuerated by their | |
2396 | * respective parents. | |
2397 | */ | |
2398 | INIT_LIST_HEAD(&resource_list); | |
2399 | acpi_dev_get_resources(device, &resource_list, acpi_check_spi_i2c_slave, | |
2400 | &is_spi_i2c_slave); | |
2401 | acpi_dev_free_resource_list(&resource_list); | |
2402 | if (!is_spi_i2c_slave) | |
2403 | acpi_create_platform_device(device); | |
2404 | } | |
2405 | ||
c5698074 | 2406 | static int acpi_scan_attach_handler(struct acpi_device *device) |
ca589f94 | 2407 | { |
c5698074 RW |
2408 | struct acpi_hardware_id *hwid; |
2409 | int ret = 0; | |
ca589f94 | 2410 | |
c5698074 | 2411 | list_for_each_entry(hwid, &device->pnp.ids, list) { |
87b85b3c | 2412 | const struct acpi_device_id *devid; |
c5698074 | 2413 | struct acpi_scan_handler *handler; |
ca589f94 | 2414 | |
c5698074 RW |
2415 | handler = acpi_scan_match_handler(hwid->id, &devid); |
2416 | if (handler) { | |
d34afa9d RW |
2417 | if (!handler->attach) { |
2418 | device->pnp.type.platform_id = 0; | |
2419 | continue; | |
2420 | } | |
9cb32acf | 2421 | device->handler = handler; |
87b85b3c | 2422 | ret = handler->attach(device, devid); |
9cb32acf | 2423 | if (ret > 0) |
c5698074 | 2424 | break; |
9cb32acf RW |
2425 | |
2426 | device->handler = NULL; | |
2427 | if (ret < 0) | |
c5698074 | 2428 | break; |
ca589f94 RW |
2429 | } |
2430 | } | |
48459340 ZR |
2431 | if (!ret) |
2432 | acpi_default_enumeration(device); | |
2433 | ||
ca589f94 RW |
2434 | return ret; |
2435 | } | |
2436 | ||
2c22e652 | 2437 | static void acpi_bus_attach(struct acpi_device *device) |
51a85faf | 2438 | { |
2c22e652 | 2439 | struct acpi_device *child; |
1e2380cd | 2440 | acpi_handle ejd; |
ca589f94 | 2441 | int ret; |
3fb02738 | 2442 | |
1e2380cd RW |
2443 | if (ACPI_SUCCESS(acpi_bus_get_ejd(device->handle, &ejd))) |
2444 | register_dock_dependent_device(device, ejd); | |
2445 | ||
2c22e652 | 2446 | acpi_bus_get_status(device); |
202317a5 | 2447 | /* Skip devices that are not present. */ |
2c22e652 RW |
2448 | if (!acpi_device_is_present(device)) { |
2449 | device->flags.visited = false; | |
1b1f3e16 | 2450 | device->flags.power_manageable = 0; |
2c22e652 RW |
2451 | return; |
2452 | } | |
3a391a39 | 2453 | if (device->handler) |
2c22e652 | 2454 | goto ok; |
3a391a39 | 2455 | |
202317a5 | 2456 | if (!device->flags.initialized) { |
1b1f3e16 RW |
2457 | device->flags.power_manageable = |
2458 | device->power.states[ACPI_STATE_D0].flags.valid; | |
2459 | if (acpi_bus_init_power(device)) | |
2460 | device->flags.power_manageable = 0; | |
2461 | ||
202317a5 RW |
2462 | device->flags.initialized = true; |
2463 | } | |
2c22e652 | 2464 | device->flags.visited = false; |
ca589f94 | 2465 | ret = acpi_scan_attach_handler(device); |
6931007c | 2466 | if (ret < 0) |
2c22e652 | 2467 | return; |
6931007c RW |
2468 | |
2469 | device->flags.match_driver = true; | |
2c22e652 RW |
2470 | if (!ret) { |
2471 | ret = device_attach(&device->dev); | |
2472 | if (ret < 0) | |
2473 | return; | |
2474 | } | |
202317a5 | 2475 | device->flags.visited = true; |
202317a5 | 2476 | |
2c22e652 RW |
2477 | ok: |
2478 | list_for_each_entry(child, &device->children, node) | |
2479 | acpi_bus_attach(child); | |
8ab17fc9 RW |
2480 | |
2481 | if (device->handler && device->handler->hotplug.notify_online) | |
2482 | device->handler->hotplug.notify_online(device); | |
1da177e4 | 2483 | } |
1da177e4 | 2484 | |
40e7fcb1 LT |
2485 | void acpi_walk_dep_device_list(acpi_handle handle) |
2486 | { | |
2487 | struct acpi_dep_data *dep, *tmp; | |
2488 | struct acpi_device *adev; | |
2489 | ||
2490 | mutex_lock(&acpi_dep_list_lock); | |
2491 | list_for_each_entry_safe(dep, tmp, &acpi_dep_list, node) { | |
2492 | if (dep->master == handle) { | |
2493 | acpi_bus_get_device(dep->slave, &adev); | |
2494 | if (!adev) | |
2495 | continue; | |
2496 | ||
2497 | adev->dep_unmet--; | |
2498 | if (!adev->dep_unmet) | |
2499 | acpi_bus_attach(adev); | |
2500 | list_del(&dep->node); | |
2501 | kfree(dep); | |
2502 | } | |
2503 | } | |
2504 | mutex_unlock(&acpi_dep_list_lock); | |
2505 | } | |
2506 | EXPORT_SYMBOL_GPL(acpi_walk_dep_device_list); | |
2507 | ||
636458de | 2508 | /** |
b8bd759a | 2509 | * acpi_bus_scan - Add ACPI device node objects in a given namespace scope. |
636458de | 2510 | * @handle: Root of the namespace scope to scan. |
7779688f | 2511 | * |
636458de RW |
2512 | * Scan a given ACPI tree (probably recently hot-plugged) and create and add |
2513 | * found devices. | |
7779688f | 2514 | * |
636458de RW |
2515 | * If no devices were found, -ENODEV is returned, but it does not mean that |
2516 | * there has been a real error. There just have been no suitable ACPI objects | |
2517 | * in the table trunk from which the kernel could create a device and add an | |
2518 | * appropriate driver. | |
3757b948 RW |
2519 | * |
2520 | * Must be called under acpi_scan_lock. | |
7779688f | 2521 | */ |
b8bd759a | 2522 | int acpi_bus_scan(acpi_handle handle) |
3fb02738 | 2523 | { |
b8bd759a | 2524 | void *device = NULL; |
3fb02738 | 2525 | |
b8bd759a RW |
2526 | if (ACPI_SUCCESS(acpi_bus_check_add(handle, 0, NULL, &device))) |
2527 | acpi_walk_namespace(ACPI_TYPE_ANY, handle, ACPI_UINT32_MAX, | |
2528 | acpi_bus_check_add, NULL, NULL, &device); | |
3fb02738 | 2529 | |
2c22e652 RW |
2530 | if (device) { |
2531 | acpi_bus_attach(device); | |
2532 | return 0; | |
05404d8f | 2533 | } |
2c22e652 | 2534 | return -ENODEV; |
3fb02738 | 2535 | } |
2c22e652 | 2536 | EXPORT_SYMBOL(acpi_bus_scan); |
1da177e4 | 2537 | |
3757b948 | 2538 | /** |
2c22e652 RW |
2539 | * acpi_bus_trim - Detach scan handlers and drivers from ACPI device objects. |
2540 | * @adev: Root of the ACPI namespace scope to walk. | |
3757b948 RW |
2541 | * |
2542 | * Must be called under acpi_scan_lock. | |
2543 | */ | |
2c22e652 | 2544 | void acpi_bus_trim(struct acpi_device *adev) |
1da177e4 | 2545 | { |
2c22e652 RW |
2546 | struct acpi_scan_handler *handler = adev->handler; |
2547 | struct acpi_device *child; | |
2548 | ||
2549 | list_for_each_entry_reverse(child, &adev->children, node) | |
2550 | acpi_bus_trim(child); | |
2551 | ||
a951c773 | 2552 | adev->flags.match_driver = false; |
2c22e652 RW |
2553 | if (handler) { |
2554 | if (handler->detach) | |
2555 | handler->detach(adev); | |
2556 | ||
2557 | adev->handler = NULL; | |
2558 | } else { | |
2559 | device_release_driver(&adev->dev); | |
2560 | } | |
05404d8f | 2561 | /* |
2c22e652 RW |
2562 | * Most likely, the device is going away, so put it into D3cold before |
2563 | * that. | |
05404d8f | 2564 | */ |
2c22e652 RW |
2565 | acpi_device_set_power(adev, ACPI_STATE_D3_COLD); |
2566 | adev->flags.initialized = false; | |
2567 | adev->flags.visited = false; | |
1da177e4 | 2568 | } |
ceaba663 KA |
2569 | EXPORT_SYMBOL_GPL(acpi_bus_trim); |
2570 | ||
e8b945c9 | 2571 | static int acpi_bus_scan_fixed(void) |
1da177e4 | 2572 | { |
4be44fcd | 2573 | int result = 0; |
c4168bff | 2574 | |
1da177e4 LT |
2575 | /* |
2576 | * Enumerate all fixed-feature devices. | |
2577 | */ | |
2c0d4fe0 RW |
2578 | if (!(acpi_gbl_FADT.flags & ACPI_FADT_POWER_BUTTON)) { |
2579 | struct acpi_device *device = NULL; | |
2580 | ||
5c478f49 | 2581 | result = acpi_add_single_object(&device, NULL, |
c4168bff | 2582 | ACPI_BUS_TYPE_POWER_BUTTON, |
2c0d4fe0 RW |
2583 | ACPI_STA_DEFAULT); |
2584 | if (result) | |
2585 | return result; | |
2586 | ||
88346167 | 2587 | device->flags.match_driver = true; |
2c0d4fe0 RW |
2588 | result = device_attach(&device->dev); |
2589 | if (result < 0) | |
2590 | return result; | |
2591 | ||
c10d7a13 | 2592 | device_init_wakeup(&device->dev, true); |
3fb02738 | 2593 | } |
1da177e4 | 2594 | |
2c0d4fe0 RW |
2595 | if (!(acpi_gbl_FADT.flags & ACPI_FADT_SLEEP_BUTTON)) { |
2596 | struct acpi_device *device = NULL; | |
2597 | ||
5c478f49 | 2598 | result = acpi_add_single_object(&device, NULL, |
c4168bff | 2599 | ACPI_BUS_TYPE_SLEEP_BUTTON, |
2c0d4fe0 RW |
2600 | ACPI_STA_DEFAULT); |
2601 | if (result) | |
2602 | return result; | |
2603 | ||
88346167 | 2604 | device->flags.match_driver = true; |
2c0d4fe0 | 2605 | result = device_attach(&device->dev); |
3fb02738 | 2606 | } |
1da177e4 | 2607 | |
2c0d4fe0 | 2608 | return result < 0 ? result : 0; |
1da177e4 LT |
2609 | } |
2610 | ||
e747f274 | 2611 | int __init acpi_scan_init(void) |
1da177e4 LT |
2612 | { |
2613 | int result; | |
1da177e4 | 2614 | |
5b327265 PM |
2615 | result = bus_register(&acpi_bus_type); |
2616 | if (result) { | |
2617 | /* We don't want to quit even if we failed to add suspend/resume */ | |
2618 | printk(KERN_ERR PREFIX "Could not register bus type\n"); | |
2619 | } | |
2620 | ||
92ef2a25 | 2621 | acpi_pci_root_init(); |
4daeaf68 | 2622 | acpi_pci_link_init(); |
ac212b69 | 2623 | acpi_processor_init(); |
f58b082a | 2624 | acpi_lpss_init(); |
92082a88 | 2625 | acpi_apd_init(); |
2fa97feb | 2626 | acpi_cmos_rtc_init(); |
737f1a9f | 2627 | acpi_container_init(); |
0a347644 | 2628 | acpi_memory_hotplug_init(); |
eec15edb | 2629 | acpi_pnp_init(); |
3230bbfc | 2630 | acpi_int340x_thermal_init(); |
97d9a9e9 | 2631 | |
3757b948 | 2632 | mutex_lock(&acpi_scan_lock); |
1da177e4 LT |
2633 | /* |
2634 | * Enumerate devices in the ACPI namespace. | |
2635 | */ | |
0cd6ac52 RW |
2636 | result = acpi_bus_scan(ACPI_ROOT_OBJECT); |
2637 | if (result) | |
3757b948 | 2638 | goto out; |
1da177e4 | 2639 | |
0cd6ac52 | 2640 | result = acpi_bus_get_device(ACPI_ROOT_OBJECT, &acpi_root); |
1da177e4 | 2641 | if (result) |
3757b948 | 2642 | goto out; |
1da177e4 | 2643 | |
2650ef42 AL |
2644 | /* Fixed feature devices do not exist on HW-reduced platform */ |
2645 | if (!acpi_gbl_reduced_hardware) { | |
2646 | result = acpi_bus_scan_fixed(); | |
2647 | if (result) { | |
2648 | acpi_detach_data(acpi_root->handle, | |
2649 | acpi_scan_drop_device); | |
2650 | acpi_device_del(acpi_root); | |
2651 | put_device(&acpi_root->dev); | |
2652 | goto out; | |
2653 | } | |
b8bd759a | 2654 | } |
1da177e4 | 2655 | |
b8bd759a | 2656 | acpi_update_all_gpes(); |
3757b948 RW |
2657 | |
2658 | out: | |
2659 | mutex_unlock(&acpi_scan_lock); | |
2660 | return result; | |
1da177e4 | 2661 | } |