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 LT |
14 | |
15 | #include <acpi/acpi_drivers.h> | |
1da177e4 | 16 | |
e60cc7a6 BH |
17 | #include "internal.h" |
18 | ||
1da177e4 | 19 | #define _COMPONENT ACPI_BUS_COMPONENT |
f52fd66d | 20 | ACPI_MODULE_NAME("scan"); |
1da177e4 | 21 | #define STRUCT_TO_INT(s) (*((int*)&s)) |
4be44fcd | 22 | extern struct acpi_device *acpi_root; |
1da177e4 LT |
23 | |
24 | #define ACPI_BUS_CLASS "system_bus" | |
29b71a1c | 25 | #define ACPI_BUS_HID "LNXSYBUS" |
1da177e4 LT |
26 | #define ACPI_BUS_DEVICE_NAME "System Bus" |
27 | ||
859ac9a4 BH |
28 | #define ACPI_IS_ROOT_DEVICE(device) (!(device)->parent) |
29 | ||
683058e3 RW |
30 | /* |
31 | * If set, devices will be hot-removed even if they cannot be put offline | |
32 | * gracefully (from the kernel's standpoint). | |
33 | */ | |
34 | bool acpi_force_hot_remove; | |
35 | ||
620e112c | 36 | static const char *dummy_hid = "device"; |
2b2ae7c7 | 37 | |
1da177e4 | 38 | static LIST_HEAD(acpi_device_list); |
e49bd2dd | 39 | static LIST_HEAD(acpi_bus_id_list); |
c511cc19 | 40 | static DEFINE_MUTEX(acpi_scan_lock); |
ca589f94 | 41 | static LIST_HEAD(acpi_scan_handlers_list); |
9090589d | 42 | DEFINE_MUTEX(acpi_device_lock); |
1da177e4 LT |
43 | LIST_HEAD(acpi_wakeup_device_list); |
44 | ||
e49bd2dd | 45 | struct acpi_device_bus_id{ |
bb095854 | 46 | char bus_id[15]; |
e49bd2dd ZR |
47 | unsigned int instance_no; |
48 | struct list_head node; | |
1da177e4 | 49 | }; |
29b71a1c | 50 | |
3757b948 RW |
51 | void acpi_scan_lock_acquire(void) |
52 | { | |
53 | mutex_lock(&acpi_scan_lock); | |
54 | } | |
55 | EXPORT_SYMBOL_GPL(acpi_scan_lock_acquire); | |
56 | ||
57 | void acpi_scan_lock_release(void) | |
58 | { | |
59 | mutex_unlock(&acpi_scan_lock); | |
60 | } | |
61 | EXPORT_SYMBOL_GPL(acpi_scan_lock_release); | |
62 | ||
ca589f94 RW |
63 | int acpi_scan_add_handler(struct acpi_scan_handler *handler) |
64 | { | |
65 | if (!handler || !handler->attach) | |
66 | return -EINVAL; | |
67 | ||
68 | list_add_tail(&handler->list_node, &acpi_scan_handlers_list); | |
69 | return 0; | |
70 | } | |
71 | ||
3f8055c3 RW |
72 | int acpi_scan_add_handler_with_hotplug(struct acpi_scan_handler *handler, |
73 | const char *hotplug_profile_name) | |
74 | { | |
75 | int error; | |
76 | ||
77 | error = acpi_scan_add_handler(handler); | |
78 | if (error) | |
79 | return error; | |
80 | ||
81 | acpi_sysfs_add_hotplug_profile(&handler->hotplug, hotplug_profile_name); | |
82 | return 0; | |
83 | } | |
84 | ||
29b71a1c TR |
85 | /* |
86 | * Creates hid/cid(s) string needed for modalias and uevent | |
87 | * e.g. on a device with hid:IBM0001 and cid:ACPI0001 you get: | |
88 | * char *modalias: "acpi:IBM0001:ACPI0001" | |
89 | */ | |
b3e572d2 AB |
90 | static int create_modalias(struct acpi_device *acpi_dev, char *modalias, |
91 | int size) | |
92 | { | |
29b71a1c | 93 | int len; |
5c9fcb5d | 94 | int count; |
7f47fa6c | 95 | struct acpi_hardware_id *id; |
29b71a1c | 96 | |
2b2ae7c7 TR |
97 | if (list_empty(&acpi_dev->pnp.ids)) |
98 | return 0; | |
99 | ||
5c9fcb5d | 100 | len = snprintf(modalias, size, "acpi:"); |
29b71a1c TR |
101 | size -= len; |
102 | ||
7f47fa6c BH |
103 | list_for_each_entry(id, &acpi_dev->pnp.ids, list) { |
104 | count = snprintf(&modalias[len], size, "%s:", id->id); | |
5c9fcb5d ZR |
105 | if (count < 0 || count >= size) |
106 | return -EINVAL; | |
107 | len += count; | |
108 | size -= count; | |
109 | } | |
110 | ||
29b71a1c TR |
111 | modalias[len] = '\0'; |
112 | return len; | |
113 | } | |
114 | ||
115 | static ssize_t | |
116 | acpi_device_modalias_show(struct device *dev, struct device_attribute *attr, char *buf) { | |
117 | struct acpi_device *acpi_dev = to_acpi_device(dev); | |
118 | int len; | |
119 | ||
120 | /* Device has no HID and no CID or string is >1024 */ | |
121 | len = create_modalias(acpi_dev, buf, 1024); | |
122 | if (len <= 0) | |
123 | return 0; | |
124 | buf[len++] = '\n'; | |
125 | return len; | |
126 | } | |
127 | static DEVICE_ATTR(modalias, 0444, acpi_device_modalias_show, NULL); | |
128 | ||
683058e3 RW |
129 | static acpi_status acpi_bus_offline_companions(acpi_handle handle, u32 lvl, |
130 | void *data, void **ret_p) | |
131 | { | |
132 | struct acpi_device *device = NULL; | |
133 | struct acpi_device_physical_node *pn; | |
303bfdb1 | 134 | bool second_pass = (bool)data; |
683058e3 RW |
135 | acpi_status status = AE_OK; |
136 | ||
137 | if (acpi_bus_get_device(handle, &device)) | |
138 | return AE_OK; | |
139 | ||
140 | mutex_lock(&device->physical_node_lock); | |
141 | ||
142 | list_for_each_entry(pn, &device->physical_node_list, node) { | |
143 | int ret; | |
144 | ||
303bfdb1 RW |
145 | if (second_pass) { |
146 | /* Skip devices offlined by the first pass. */ | |
147 | if (pn->put_online) | |
148 | continue; | |
149 | } else { | |
150 | pn->put_online = false; | |
151 | } | |
683058e3 RW |
152 | ret = device_offline(pn->dev); |
153 | if (acpi_force_hot_remove) | |
154 | continue; | |
155 | ||
303bfdb1 RW |
156 | if (ret >= 0) { |
157 | pn->put_online = !ret; | |
158 | } else { | |
159 | *ret_p = pn->dev; | |
160 | if (second_pass) { | |
161 | status = AE_ERROR; | |
162 | break; | |
163 | } | |
683058e3 | 164 | } |
683058e3 RW |
165 | } |
166 | ||
167 | mutex_unlock(&device->physical_node_lock); | |
168 | ||
169 | return status; | |
170 | } | |
171 | ||
172 | static acpi_status acpi_bus_online_companions(acpi_handle handle, u32 lvl, | |
173 | void *data, void **ret_p) | |
174 | { | |
175 | struct acpi_device *device = NULL; | |
176 | struct acpi_device_physical_node *pn; | |
177 | ||
178 | if (acpi_bus_get_device(handle, &device)) | |
179 | return AE_OK; | |
180 | ||
181 | mutex_lock(&device->physical_node_lock); | |
182 | ||
183 | list_for_each_entry(pn, &device->physical_node_list, node) | |
184 | if (pn->put_online) { | |
185 | device_online(pn->dev); | |
186 | pn->put_online = false; | |
187 | } | |
188 | ||
189 | mutex_unlock(&device->physical_node_lock); | |
190 | ||
191 | return AE_OK; | |
192 | } | |
193 | ||
a33ec399 | 194 | static int acpi_scan_hot_remove(struct acpi_device *device) |
1da177e4 | 195 | { |
5993c467 | 196 | acpi_handle handle = device->handle; |
a33ec399 | 197 | acpi_handle not_used; |
1da177e4 LT |
198 | struct acpi_object_list arg_list; |
199 | union acpi_object arg; | |
303bfdb1 | 200 | struct device *errdev; |
a33ec399 | 201 | acpi_status status; |
882fd12e | 202 | unsigned long long sta; |
f058cdf4 | 203 | |
3757b948 | 204 | /* If there is no handle, the device node has been unregistered. */ |
a33ec399 | 205 | if (!handle) { |
3757b948 RW |
206 | dev_dbg(&device->dev, "ACPI handle missing\n"); |
207 | put_device(&device->dev); | |
a33ec399 | 208 | return -EINVAL; |
3757b948 RW |
209 | } |
210 | ||
683058e3 RW |
211 | lock_device_hotplug(); |
212 | ||
303bfdb1 RW |
213 | /* |
214 | * Carry out two passes here and ignore errors in the first pass, | |
215 | * because if the devices in question are memory blocks and | |
216 | * CONFIG_MEMCG is set, one of the blocks may hold data structures | |
217 | * that the other blocks depend on, but it is not known in advance which | |
218 | * block holds them. | |
219 | * | |
220 | * If the first pass is successful, the second one isn't needed, though. | |
221 | */ | |
222 | errdev = NULL; | |
223 | acpi_walk_namespace(ACPI_TYPE_ANY, handle, ACPI_UINT32_MAX, | |
224 | NULL, acpi_bus_offline_companions, | |
225 | (void *)false, (void **)&errdev); | |
226 | acpi_bus_offline_companions(handle, 0, (void *)false, (void **)&errdev); | |
227 | if (errdev) { | |
228 | errdev = NULL; | |
683058e3 | 229 | acpi_walk_namespace(ACPI_TYPE_ANY, handle, ACPI_UINT32_MAX, |
303bfdb1 RW |
230 | NULL, acpi_bus_offline_companions, |
231 | (void *)true , (void **)&errdev); | |
232 | if (!errdev || acpi_force_hot_remove) | |
233 | acpi_bus_offline_companions(handle, 0, (void *)true, | |
234 | (void **)&errdev); | |
235 | ||
236 | if (errdev && !acpi_force_hot_remove) { | |
237 | dev_warn(errdev, "Offline failed.\n"); | |
238 | acpi_bus_online_companions(handle, 0, NULL, NULL); | |
239 | acpi_walk_namespace(ACPI_TYPE_ANY, handle, | |
240 | ACPI_UINT32_MAX, | |
241 | acpi_bus_online_companions, NULL, | |
242 | NULL, NULL); | |
243 | ||
244 | unlock_device_hotplug(); | |
245 | ||
246 | put_device(&device->dev); | |
247 | return -EBUSY; | |
248 | } | |
683058e3 RW |
249 | } |
250 | ||
26d46867 | 251 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
0794469d | 252 | "Hot-removing device %s...\n", dev_name(&device->dev))); |
26d46867 | 253 | |
bfee26db | 254 | acpi_bus_trim(device); |
683058e3 RW |
255 | |
256 | unlock_device_hotplug(); | |
257 | ||
3757b948 RW |
258 | /* Device node has been unregistered. */ |
259 | put_device(&device->dev); | |
b3c450c3 TK |
260 | device = NULL; |
261 | ||
a33ec399 | 262 | if (ACPI_SUCCESS(acpi_get_handle(handle, "_LCK", ¬_used))) { |
1da177e4 LT |
263 | arg_list.count = 1; |
264 | arg_list.pointer = &arg; | |
265 | arg.type = ACPI_TYPE_INTEGER; | |
266 | arg.integer.value = 0; | |
267 | acpi_evaluate_object(handle, "_LCK", &arg_list, NULL); | |
268 | } | |
1da177e4 | 269 | |
1da177e4 LT |
270 | arg_list.count = 1; |
271 | arg_list.pointer = &arg; | |
272 | arg.type = ACPI_TYPE_INTEGER; | |
273 | arg.integer.value = 1; | |
1da177e4 | 274 | |
1da177e4 LT |
275 | /* |
276 | * TBD: _EJD support. | |
277 | */ | |
1da177e4 | 278 | status = acpi_evaluate_object(handle, "_EJ0", &arg_list, NULL); |
c4753e57 | 279 | if (ACPI_FAILURE(status)) { |
a33ec399 RW |
280 | if (status == AE_NOT_FOUND) { |
281 | return -ENODEV; | |
282 | } else { | |
882fd12e TK |
283 | acpi_handle_warn(handle, "Eject failed (0x%x)\n", |
284 | status); | |
a33ec399 RW |
285 | return -EIO; |
286 | } | |
287 | } | |
1da177e4 | 288 | |
882fd12e TK |
289 | /* |
290 | * Verify if eject was indeed successful. If not, log an error | |
291 | * message. No need to call _OST since _EJ0 call was made OK. | |
292 | */ | |
293 | status = acpi_evaluate_integer(handle, "_STA", NULL, &sta); | |
294 | if (ACPI_FAILURE(status)) { | |
295 | acpi_handle_warn(handle, | |
296 | "Status check after eject failed (0x%x)\n", status); | |
297 | } else if (sta & ACPI_STA_DEVICE_ENABLED) { | |
298 | acpi_handle_warn(handle, | |
299 | "Eject incomplete - status 0x%llx\n", sta); | |
300 | } | |
301 | ||
a33ec399 RW |
302 | return 0; |
303 | } | |
1da177e4 | 304 | |
a33ec399 RW |
305 | static void acpi_bus_device_eject(void *context) |
306 | { | |
307 | acpi_handle handle = context; | |
308 | struct acpi_device *device = NULL; | |
309 | struct acpi_scan_handler *handler; | |
310 | u32 ost_code = ACPI_OST_SC_NON_SPECIFIC_FAILURE; | |
311 | ||
312 | mutex_lock(&acpi_scan_lock); | |
313 | ||
314 | acpi_bus_get_device(handle, &device); | |
315 | if (!device) | |
316 | goto err_out; | |
317 | ||
318 | handler = device->handler; | |
319 | if (!handler || !handler->hotplug.enabled) { | |
320 | ost_code = ACPI_OST_SC_EJECT_NOT_SUPPORTED; | |
321 | goto err_out; | |
322 | } | |
323 | acpi_evaluate_hotplug_ost(handle, ACPI_NOTIFY_EJECT_REQUEST, | |
324 | ACPI_OST_SC_EJECT_IN_PROGRESS, NULL); | |
325 | if (handler->hotplug.mode == AHM_CONTAINER) { | |
326 | device->flags.eject_pending = true; | |
327 | kobject_uevent(&device->dev.kobj, KOBJ_OFFLINE); | |
328 | } else { | |
329 | int error; | |
330 | ||
331 | get_device(&device->dev); | |
332 | error = acpi_scan_hot_remove(device); | |
333 | if (error) | |
334 | goto err_out; | |
f058cdf4 | 335 | } |
1da177e4 | 336 | |
3757b948 | 337 | out: |
f058cdf4 | 338 | mutex_unlock(&acpi_scan_lock); |
c8d72a5e | 339 | return; |
a33ec399 RW |
340 | |
341 | err_out: | |
342 | acpi_evaluate_hotplug_ost(handle, ACPI_NOTIFY_EJECT_REQUEST, ost_code, | |
343 | NULL); | |
344 | goto out; | |
345 | } | |
346 | ||
347 | static void acpi_scan_bus_device_check(acpi_handle handle, u32 ost_source) | |
348 | { | |
349 | struct acpi_device *device = NULL; | |
350 | u32 ost_code = ACPI_OST_SC_NON_SPECIFIC_FAILURE; | |
351 | int error; | |
352 | ||
353 | mutex_lock(&acpi_scan_lock); | |
683058e3 | 354 | lock_device_hotplug(); |
a33ec399 RW |
355 | |
356 | acpi_bus_get_device(handle, &device); | |
357 | if (device) { | |
358 | dev_warn(&device->dev, "Attempt to re-insert\n"); | |
359 | goto out; | |
360 | } | |
361 | acpi_evaluate_hotplug_ost(handle, ost_source, | |
362 | ACPI_OST_SC_INSERT_IN_PROGRESS, NULL); | |
363 | error = acpi_bus_scan(handle); | |
364 | if (error) { | |
365 | acpi_handle_warn(handle, "Namespace scan failure\n"); | |
366 | goto out; | |
367 | } | |
368 | error = acpi_bus_get_device(handle, &device); | |
369 | if (error) { | |
370 | acpi_handle_warn(handle, "Missing device node object\n"); | |
371 | goto out; | |
372 | } | |
373 | ost_code = ACPI_OST_SC_SUCCESS; | |
374 | if (device->handler && device->handler->hotplug.mode == AHM_CONTAINER) | |
375 | kobject_uevent(&device->dev.kobj, KOBJ_ONLINE); | |
376 | ||
377 | out: | |
683058e3 | 378 | unlock_device_hotplug(); |
a33ec399 RW |
379 | acpi_evaluate_hotplug_ost(handle, ost_source, ost_code, NULL); |
380 | mutex_unlock(&acpi_scan_lock); | |
381 | } | |
382 | ||
383 | static void acpi_scan_bus_check(void *context) | |
384 | { | |
385 | acpi_scan_bus_device_check((acpi_handle)context, | |
386 | ACPI_NOTIFY_BUS_CHECK); | |
387 | } | |
388 | ||
389 | static void acpi_scan_device_check(void *context) | |
390 | { | |
391 | acpi_scan_bus_device_check((acpi_handle)context, | |
392 | ACPI_NOTIFY_DEVICE_CHECK); | |
393 | } | |
394 | ||
2cbb14fb TK |
395 | static void acpi_hotplug_unsupported(acpi_handle handle, u32 type) |
396 | { | |
397 | u32 ost_status; | |
398 | ||
399 | switch (type) { | |
400 | case ACPI_NOTIFY_BUS_CHECK: | |
401 | acpi_handle_debug(handle, | |
402 | "ACPI_NOTIFY_BUS_CHECK event: unsupported\n"); | |
403 | ost_status = ACPI_OST_SC_INSERT_NOT_SUPPORTED; | |
404 | break; | |
405 | case ACPI_NOTIFY_DEVICE_CHECK: | |
406 | acpi_handle_debug(handle, | |
407 | "ACPI_NOTIFY_DEVICE_CHECK event: unsupported\n"); | |
408 | ost_status = ACPI_OST_SC_INSERT_NOT_SUPPORTED; | |
409 | break; | |
410 | case ACPI_NOTIFY_EJECT_REQUEST: | |
411 | acpi_handle_debug(handle, | |
412 | "ACPI_NOTIFY_EJECT_REQUEST event: unsupported\n"); | |
413 | ost_status = ACPI_OST_SC_EJECT_NOT_SUPPORTED; | |
414 | break; | |
415 | default: | |
416 | /* non-hotplug event; possibly handled by other handler */ | |
417 | return; | |
418 | } | |
419 | ||
420 | acpi_evaluate_hotplug_ost(handle, type, ost_status, NULL); | |
421 | } | |
422 | ||
423 | static void acpi_hotplug_notify_cb(acpi_handle handle, u32 type, void *data) | |
a33ec399 RW |
424 | { |
425 | acpi_osd_exec_callback callback; | |
2cbb14fb | 426 | struct acpi_scan_handler *handler = data; |
a33ec399 RW |
427 | acpi_status status; |
428 | ||
2cbb14fb TK |
429 | if (!handler->hotplug.enabled) |
430 | return acpi_hotplug_unsupported(handle, type); | |
431 | ||
a33ec399 RW |
432 | switch (type) { |
433 | case ACPI_NOTIFY_BUS_CHECK: | |
434 | acpi_handle_debug(handle, "ACPI_NOTIFY_BUS_CHECK event\n"); | |
435 | callback = acpi_scan_bus_check; | |
436 | break; | |
437 | case ACPI_NOTIFY_DEVICE_CHECK: | |
438 | acpi_handle_debug(handle, "ACPI_NOTIFY_DEVICE_CHECK event\n"); | |
439 | callback = acpi_scan_device_check; | |
440 | break; | |
441 | case ACPI_NOTIFY_EJECT_REQUEST: | |
442 | acpi_handle_debug(handle, "ACPI_NOTIFY_EJECT_REQUEST event\n"); | |
443 | callback = acpi_bus_device_eject; | |
444 | break; | |
445 | default: | |
446 | /* non-hotplug event; possibly handled by other handler */ | |
447 | return; | |
448 | } | |
449 | status = acpi_os_hotplug_execute(callback, handle); | |
450 | if (ACPI_FAILURE(status)) | |
451 | acpi_evaluate_hotplug_ost(handle, type, | |
452 | ACPI_OST_SC_NON_SPECIFIC_FAILURE, | |
453 | NULL); | |
454 | } | |
455 | ||
456 | /** | |
457 | * acpi_bus_hot_remove_device: hot-remove a device and its children | |
458 | * @context: struct acpi_eject_event pointer (freed in this func) | |
459 | * | |
460 | * Hot-remove a device and its children. This function frees up the | |
461 | * memory space passed by arg context, so that the caller may call | |
462 | * this function asynchronously through acpi_os_hotplug_execute(). | |
463 | */ | |
464 | void acpi_bus_hot_remove_device(void *context) | |
465 | { | |
466 | struct acpi_eject_event *ej_event = context; | |
467 | struct acpi_device *device = ej_event->device; | |
468 | acpi_handle handle = device->handle; | |
469 | int error; | |
470 | ||
471 | mutex_lock(&acpi_scan_lock); | |
472 | ||
473 | error = acpi_scan_hot_remove(device); | |
474 | if (error && handle) | |
475 | acpi_evaluate_hotplug_ost(handle, ej_event->event, | |
476 | ACPI_OST_SC_NON_SPECIFIC_FAILURE, | |
477 | NULL); | |
478 | ||
479 | mutex_unlock(&acpi_scan_lock); | |
480 | kfree(context); | |
1da177e4 | 481 | } |
61622acc | 482 | EXPORT_SYMBOL(acpi_bus_hot_remove_device); |
1da177e4 | 483 | |
836aedb1 RW |
484 | static ssize_t real_power_state_show(struct device *dev, |
485 | struct device_attribute *attr, char *buf) | |
486 | { | |
487 | struct acpi_device *adev = to_acpi_device(dev); | |
488 | int state; | |
489 | int ret; | |
490 | ||
491 | ret = acpi_device_get_power(adev, &state); | |
492 | if (ret) | |
493 | return ret; | |
494 | ||
495 | return sprintf(buf, "%s\n", acpi_power_state_string(state)); | |
496 | } | |
497 | ||
498 | static DEVICE_ATTR(real_power_state, 0444, real_power_state_show, NULL); | |
499 | ||
500 | static ssize_t power_state_show(struct device *dev, | |
501 | struct device_attribute *attr, char *buf) | |
502 | { | |
503 | struct acpi_device *adev = to_acpi_device(dev); | |
504 | ||
505 | return sprintf(buf, "%s\n", acpi_power_state_string(adev->power.state)); | |
506 | } | |
507 | ||
508 | static DEVICE_ATTR(power_state, 0444, power_state_show, NULL); | |
509 | ||
1da177e4 | 510 | static ssize_t |
f883d9db PM |
511 | acpi_eject_store(struct device *d, struct device_attribute *attr, |
512 | const char *buf, size_t count) | |
1da177e4 | 513 | { |
f883d9db | 514 | struct acpi_device *acpi_device = to_acpi_device(d); |
c4753e57 | 515 | struct acpi_eject_event *ej_event; |
a33ec399 RW |
516 | acpi_object_type not_used; |
517 | acpi_status status; | |
518 | u32 ost_source; | |
519 | int ret; | |
1da177e4 | 520 | |
a33ec399 | 521 | if (!count || buf[0] != '1') |
1da177e4 | 522 | return -EINVAL; |
1da177e4 | 523 | |
a33ec399 RW |
524 | if ((!acpi_device->handler || !acpi_device->handler->hotplug.enabled) |
525 | && !acpi_device->driver) | |
526 | return -ENODEV; | |
527 | ||
528 | status = acpi_get_type(acpi_device->handle, ¬_used); | |
529 | if (ACPI_FAILURE(status) || !acpi_device->flags.ejectable) | |
530 | return -ENODEV; | |
531 | ||
532 | mutex_lock(&acpi_scan_lock); | |
c4753e57 | 533 | |
c4753e57 | 534 | if (acpi_device->flags.eject_pending) { |
a33ec399 RW |
535 | /* ACPI eject notification event. */ |
536 | ost_source = ACPI_NOTIFY_EJECT_REQUEST; | |
c4753e57 TK |
537 | acpi_device->flags.eject_pending = 0; |
538 | } else { | |
a33ec399 RW |
539 | /* Eject initiated by user space. */ |
540 | ost_source = ACPI_OST_EC_OSPM_EJECT; | |
c4753e57 | 541 | } |
a33ec399 RW |
542 | ej_event = kmalloc(sizeof(*ej_event), GFP_KERNEL); |
543 | if (!ej_event) { | |
544 | ret = -ENOMEM; | |
545 | goto err_out; | |
546 | } | |
547 | acpi_evaluate_hotplug_ost(acpi_device->handle, ost_source, | |
548 | ACPI_OST_SC_EJECT_IN_PROGRESS, NULL); | |
549 | ej_event->device = acpi_device; | |
550 | ej_event->event = ost_source; | |
551 | get_device(&acpi_device->dev); | |
3757b948 RW |
552 | status = acpi_os_hotplug_execute(acpi_bus_hot_remove_device, ej_event); |
553 | if (ACPI_FAILURE(status)) { | |
554 | put_device(&acpi_device->dev); | |
555 | kfree(ej_event); | |
a33ec399 RW |
556 | ret = status == AE_NO_MEMORY ? -ENOMEM : -EAGAIN; |
557 | goto err_out; | |
3757b948 | 558 | } |
a33ec399 RW |
559 | ret = count; |
560 | ||
561 | out: | |
562 | mutex_unlock(&acpi_scan_lock); | |
1da177e4 | 563 | return ret; |
a33ec399 RW |
564 | |
565 | err_out: | |
566 | acpi_evaluate_hotplug_ost(acpi_device->handle, ost_source, | |
567 | ACPI_OST_SC_NON_SPECIFIC_FAILURE, NULL); | |
568 | goto out; | |
1da177e4 LT |
569 | } |
570 | ||
f883d9db | 571 | static DEVICE_ATTR(eject, 0200, NULL, acpi_eject_store); |
1da177e4 | 572 | |
e49bd2dd ZR |
573 | static ssize_t |
574 | acpi_device_hid_show(struct device *dev, struct device_attribute *attr, char *buf) { | |
575 | struct acpi_device *acpi_dev = to_acpi_device(dev); | |
1da177e4 | 576 | |
ea8d82fd | 577 | return sprintf(buf, "%s\n", acpi_device_hid(acpi_dev)); |
1da177e4 | 578 | } |
e49bd2dd | 579 | static DEVICE_ATTR(hid, 0444, acpi_device_hid_show, NULL); |
1da177e4 | 580 | |
923d4a45 LZ |
581 | static ssize_t acpi_device_uid_show(struct device *dev, |
582 | struct device_attribute *attr, char *buf) | |
583 | { | |
584 | struct acpi_device *acpi_dev = to_acpi_device(dev); | |
585 | ||
586 | return sprintf(buf, "%s\n", acpi_dev->pnp.unique_id); | |
587 | } | |
588 | static DEVICE_ATTR(uid, 0444, acpi_device_uid_show, NULL); | |
589 | ||
590 | static ssize_t acpi_device_adr_show(struct device *dev, | |
591 | struct device_attribute *attr, char *buf) | |
592 | { | |
593 | struct acpi_device *acpi_dev = to_acpi_device(dev); | |
594 | ||
595 | return sprintf(buf, "0x%08x\n", | |
596 | (unsigned int)(acpi_dev->pnp.bus_address)); | |
597 | } | |
598 | static DEVICE_ATTR(adr, 0444, acpi_device_adr_show, NULL); | |
599 | ||
e49bd2dd ZR |
600 | static ssize_t |
601 | acpi_device_path_show(struct device *dev, struct device_attribute *attr, char *buf) { | |
602 | struct acpi_device *acpi_dev = to_acpi_device(dev); | |
603 | struct acpi_buffer path = {ACPI_ALLOCATE_BUFFER, NULL}; | |
604 | int result; | |
1da177e4 | 605 | |
e49bd2dd | 606 | result = acpi_get_name(acpi_dev->handle, ACPI_FULL_PATHNAME, &path); |
0c526d96 | 607 | if (result) |
e49bd2dd | 608 | goto end; |
1da177e4 | 609 | |
e49bd2dd ZR |
610 | result = sprintf(buf, "%s\n", (char*)path.pointer); |
611 | kfree(path.pointer); | |
0c526d96 | 612 | end: |
e49bd2dd | 613 | return result; |
1da177e4 | 614 | } |
e49bd2dd | 615 | static DEVICE_ATTR(path, 0444, acpi_device_path_show, NULL); |
1da177e4 | 616 | |
d1efe3c3 LO |
617 | /* sysfs file that shows description text from the ACPI _STR method */ |
618 | static ssize_t description_show(struct device *dev, | |
619 | struct device_attribute *attr, | |
620 | char *buf) { | |
621 | struct acpi_device *acpi_dev = to_acpi_device(dev); | |
622 | int result; | |
623 | ||
624 | if (acpi_dev->pnp.str_obj == NULL) | |
625 | return 0; | |
626 | ||
627 | /* | |
628 | * The _STR object contains a Unicode identifier for a device. | |
629 | * We need to convert to utf-8 so it can be displayed. | |
630 | */ | |
631 | result = utf16s_to_utf8s( | |
632 | (wchar_t *)acpi_dev->pnp.str_obj->buffer.pointer, | |
633 | acpi_dev->pnp.str_obj->buffer.length, | |
634 | UTF16_LITTLE_ENDIAN, buf, | |
635 | PAGE_SIZE); | |
636 | ||
637 | buf[result++] = '\n'; | |
638 | ||
639 | return result; | |
640 | } | |
641 | static DEVICE_ATTR(description, 0444, description_show, NULL); | |
642 | ||
bb74ac23 YI |
643 | static ssize_t |
644 | acpi_device_sun_show(struct device *dev, struct device_attribute *attr, | |
645 | char *buf) { | |
646 | struct acpi_device *acpi_dev = to_acpi_device(dev); | |
647 | ||
648 | return sprintf(buf, "%lu\n", acpi_dev->pnp.sun); | |
649 | } | |
650 | static DEVICE_ATTR(sun, 0444, acpi_device_sun_show, NULL); | |
651 | ||
e49bd2dd | 652 | static int acpi_device_setup_files(struct acpi_device *dev) |
1da177e4 | 653 | { |
d1efe3c3 | 654 | struct acpi_buffer buffer = {ACPI_ALLOCATE_BUFFER, NULL}; |
f883d9db PM |
655 | acpi_status status; |
656 | acpi_handle temp; | |
bb74ac23 | 657 | unsigned long long sun; |
e49bd2dd | 658 | int result = 0; |
1da177e4 LT |
659 | |
660 | /* | |
e49bd2dd | 661 | * Devices gotten from FADT don't have a "path" attribute |
1da177e4 | 662 | */ |
0c526d96 | 663 | if (dev->handle) { |
e49bd2dd | 664 | result = device_create_file(&dev->dev, &dev_attr_path); |
0c526d96 | 665 | if (result) |
e49bd2dd | 666 | goto end; |
1da177e4 LT |
667 | } |
668 | ||
2b2ae7c7 TR |
669 | if (!list_empty(&dev->pnp.ids)) { |
670 | result = device_create_file(&dev->dev, &dev_attr_hid); | |
671 | if (result) | |
672 | goto end; | |
1da177e4 | 673 | |
2b2ae7c7 TR |
674 | result = device_create_file(&dev->dev, &dev_attr_modalias); |
675 | if (result) | |
676 | goto end; | |
677 | } | |
29b71a1c | 678 | |
d1efe3c3 LO |
679 | /* |
680 | * If device has _STR, 'description' file is created | |
681 | */ | |
682 | status = acpi_get_handle(dev->handle, "_STR", &temp); | |
683 | if (ACPI_SUCCESS(status)) { | |
684 | status = acpi_evaluate_object(dev->handle, "_STR", | |
685 | NULL, &buffer); | |
686 | if (ACPI_FAILURE(status)) | |
687 | buffer.pointer = NULL; | |
688 | dev->pnp.str_obj = buffer.pointer; | |
689 | result = device_create_file(&dev->dev, &dev_attr_description); | |
690 | if (result) | |
691 | goto end; | |
692 | } | |
693 | ||
d4e1a692 | 694 | if (dev->pnp.type.bus_address) |
923d4a45 LZ |
695 | result = device_create_file(&dev->dev, &dev_attr_adr); |
696 | if (dev->pnp.unique_id) | |
697 | result = device_create_file(&dev->dev, &dev_attr_uid); | |
698 | ||
bb74ac23 YI |
699 | status = acpi_evaluate_integer(dev->handle, "_SUN", NULL, &sun); |
700 | if (ACPI_SUCCESS(status)) { | |
701 | dev->pnp.sun = (unsigned long)sun; | |
702 | result = device_create_file(&dev->dev, &dev_attr_sun); | |
703 | if (result) | |
704 | goto end; | |
705 | } else { | |
706 | dev->pnp.sun = (unsigned long)-1; | |
707 | } | |
708 | ||
e49bd2dd ZR |
709 | /* |
710 | * If device has _EJ0, 'eject' file is created that is used to trigger | |
711 | * hot-removal function from userland. | |
712 | */ | |
f883d9db | 713 | status = acpi_get_handle(dev->handle, "_EJ0", &temp); |
836aedb1 | 714 | if (ACPI_SUCCESS(status)) { |
e49bd2dd | 715 | result = device_create_file(&dev->dev, &dev_attr_eject); |
836aedb1 RW |
716 | if (result) |
717 | return result; | |
718 | } | |
719 | ||
720 | if (dev->flags.power_manageable) { | |
721 | result = device_create_file(&dev->dev, &dev_attr_power_state); | |
722 | if (result) | |
723 | return result; | |
724 | ||
725 | if (dev->power.flags.power_resources) | |
726 | result = device_create_file(&dev->dev, | |
727 | &dev_attr_real_power_state); | |
728 | } | |
729 | ||
0c526d96 | 730 | end: |
e49bd2dd | 731 | return result; |
1da177e4 LT |
732 | } |
733 | ||
f883d9db | 734 | static void acpi_device_remove_files(struct acpi_device *dev) |
1da177e4 | 735 | { |
f883d9db PM |
736 | acpi_status status; |
737 | acpi_handle temp; | |
1da177e4 | 738 | |
836aedb1 RW |
739 | if (dev->flags.power_manageable) { |
740 | device_remove_file(&dev->dev, &dev_attr_power_state); | |
741 | if (dev->power.flags.power_resources) | |
742 | device_remove_file(&dev->dev, | |
743 | &dev_attr_real_power_state); | |
744 | } | |
745 | ||
f883d9db | 746 | /* |
d1efe3c3 LO |
747 | * If device has _STR, remove 'description' file |
748 | */ | |
749 | status = acpi_get_handle(dev->handle, "_STR", &temp); | |
750 | if (ACPI_SUCCESS(status)) { | |
751 | kfree(dev->pnp.str_obj); | |
752 | device_remove_file(&dev->dev, &dev_attr_description); | |
753 | } | |
754 | /* | |
755 | * If device has _EJ0, remove 'eject' file. | |
f883d9db PM |
756 | */ |
757 | status = acpi_get_handle(dev->handle, "_EJ0", &temp); | |
758 | if (ACPI_SUCCESS(status)) | |
759 | device_remove_file(&dev->dev, &dev_attr_eject); | |
1da177e4 | 760 | |
bb74ac23 YI |
761 | status = acpi_get_handle(dev->handle, "_SUN", &temp); |
762 | if (ACPI_SUCCESS(status)) | |
763 | device_remove_file(&dev->dev, &dev_attr_sun); | |
764 | ||
923d4a45 LZ |
765 | if (dev->pnp.unique_id) |
766 | device_remove_file(&dev->dev, &dev_attr_uid); | |
d4e1a692 | 767 | if (dev->pnp.type.bus_address) |
923d4a45 | 768 | device_remove_file(&dev->dev, &dev_attr_adr); |
1131b938 BH |
769 | device_remove_file(&dev->dev, &dev_attr_modalias); |
770 | device_remove_file(&dev->dev, &dev_attr_hid); | |
0c526d96 | 771 | if (dev->handle) |
e49bd2dd | 772 | device_remove_file(&dev->dev, &dev_attr_path); |
1da177e4 | 773 | } |
1da177e4 | 774 | /* -------------------------------------------------------------------------- |
9e89dde2 | 775 | ACPI Bus operations |
1da177e4 | 776 | -------------------------------------------------------------------------- */ |
29b71a1c | 777 | |
cf761af9 MW |
778 | static const struct acpi_device_id *__acpi_match_device( |
779 | struct acpi_device *device, const struct acpi_device_id *ids) | |
29b71a1c TR |
780 | { |
781 | const struct acpi_device_id *id; | |
7f47fa6c | 782 | struct acpi_hardware_id *hwid; |
29b71a1c | 783 | |
39a0ad87 ZY |
784 | /* |
785 | * If the device is not present, it is unnecessary to load device | |
786 | * driver for it. | |
787 | */ | |
788 | if (!device->status.present) | |
cf761af9 | 789 | return NULL; |
39a0ad87 | 790 | |
7f47fa6c BH |
791 | for (id = ids; id->id[0]; id++) |
792 | list_for_each_entry(hwid, &device->pnp.ids, list) | |
793 | if (!strcmp((char *) id->id, hwid->id)) | |
cf761af9 MW |
794 | return id; |
795 | ||
796 | return NULL; | |
797 | } | |
798 | ||
799 | /** | |
800 | * acpi_match_device - Match a struct device against a given list of ACPI IDs | |
801 | * @ids: Array of struct acpi_device_id object to match against. | |
802 | * @dev: The device structure to match. | |
803 | * | |
804 | * Check if @dev has a valid ACPI handle and if there is a struct acpi_device | |
805 | * object for that handle and use that object to match against a given list of | |
806 | * device IDs. | |
807 | * | |
808 | * Return a pointer to the first matching ID on success or %NULL on failure. | |
809 | */ | |
810 | const struct acpi_device_id *acpi_match_device(const struct acpi_device_id *ids, | |
811 | const struct device *dev) | |
812 | { | |
813 | struct acpi_device *adev; | |
0613e1f7 | 814 | acpi_handle handle = ACPI_HANDLE(dev); |
cf761af9 | 815 | |
0613e1f7 | 816 | if (!ids || !handle || acpi_bus_get_device(handle, &adev)) |
cf761af9 MW |
817 | return NULL; |
818 | ||
819 | return __acpi_match_device(adev, ids); | |
820 | } | |
821 | EXPORT_SYMBOL_GPL(acpi_match_device); | |
29b71a1c | 822 | |
cf761af9 MW |
823 | int acpi_match_device_ids(struct acpi_device *device, |
824 | const struct acpi_device_id *ids) | |
825 | { | |
826 | return __acpi_match_device(device, ids) ? 0 : -ENOENT; | |
29b71a1c TR |
827 | } |
828 | EXPORT_SYMBOL(acpi_match_device_ids); | |
829 | ||
0b224527 RW |
830 | static void acpi_free_power_resources_lists(struct acpi_device *device) |
831 | { | |
832 | int i; | |
833 | ||
993cbe59 RW |
834 | if (device->wakeup.flags.valid) |
835 | acpi_power_resources_list_free(&device->wakeup.resources); | |
836 | ||
0b224527 RW |
837 | if (!device->flags.power_manageable) |
838 | return; | |
839 | ||
840 | for (i = ACPI_STATE_D0; i <= ACPI_STATE_D3_HOT; i++) { | |
841 | struct acpi_device_power_state *ps = &device->power.states[i]; | |
842 | acpi_power_resources_list_free(&ps->resources); | |
843 | } | |
7f47fa6c BH |
844 | } |
845 | ||
1890a97a | 846 | static void acpi_device_release(struct device *dev) |
1da177e4 | 847 | { |
1890a97a | 848 | struct acpi_device *acpi_dev = to_acpi_device(dev); |
1da177e4 | 849 | |
c0af4175 | 850 | acpi_free_pnp_ids(&acpi_dev->pnp); |
0b224527 | 851 | acpi_free_power_resources_lists(acpi_dev); |
1890a97a | 852 | kfree(acpi_dev); |
1da177e4 LT |
853 | } |
854 | ||
5d9464a4 | 855 | static int acpi_bus_match(struct device *dev, struct device_driver *drv) |
9e89dde2 | 856 | { |
5d9464a4 PM |
857 | struct acpi_device *acpi_dev = to_acpi_device(dev); |
858 | struct acpi_driver *acpi_drv = to_acpi_driver(drv); | |
1da177e4 | 859 | |
209d3b17 | 860 | return acpi_dev->flags.match_driver |
805d410f | 861 | && !acpi_match_device_ids(acpi_dev, acpi_drv->ids); |
5d9464a4 | 862 | } |
1da177e4 | 863 | |
7eff2e7a | 864 | static int acpi_device_uevent(struct device *dev, struct kobj_uevent_env *env) |
1da177e4 | 865 | { |
5d9464a4 | 866 | struct acpi_device *acpi_dev = to_acpi_device(dev); |
7eff2e7a | 867 | int len; |
5d9464a4 | 868 | |
2b2ae7c7 TR |
869 | if (list_empty(&acpi_dev->pnp.ids)) |
870 | return 0; | |
871 | ||
7eff2e7a KS |
872 | if (add_uevent_var(env, "MODALIAS=")) |
873 | return -ENOMEM; | |
874 | len = create_modalias(acpi_dev, &env->buf[env->buflen - 1], | |
875 | sizeof(env->buf) - env->buflen); | |
876 | if (len >= (sizeof(env->buf) - env->buflen)) | |
877 | return -ENOMEM; | |
878 | env->buflen += len; | |
9e89dde2 | 879 | return 0; |
1da177e4 LT |
880 | } |
881 | ||
46ec8598 BH |
882 | static void acpi_device_notify(acpi_handle handle, u32 event, void *data) |
883 | { | |
884 | struct acpi_device *device = data; | |
885 | ||
886 | device->driver->ops.notify(device, event); | |
887 | } | |
888 | ||
889 | static acpi_status acpi_device_notify_fixed(void *data) | |
890 | { | |
891 | struct acpi_device *device = data; | |
892 | ||
53de5356 BH |
893 | /* Fixed hardware devices have no handles */ |
894 | acpi_device_notify(NULL, ACPI_FIXED_HARDWARE_EVENT, device); | |
46ec8598 BH |
895 | return AE_OK; |
896 | } | |
897 | ||
898 | static int acpi_device_install_notify_handler(struct acpi_device *device) | |
899 | { | |
900 | acpi_status status; | |
46ec8598 | 901 | |
ccba2a36 | 902 | if (device->device_type == ACPI_BUS_TYPE_POWER_BUTTON) |
46ec8598 BH |
903 | status = |
904 | acpi_install_fixed_event_handler(ACPI_EVENT_POWER_BUTTON, | |
905 | acpi_device_notify_fixed, | |
906 | device); | |
ccba2a36 | 907 | else if (device->device_type == ACPI_BUS_TYPE_SLEEP_BUTTON) |
46ec8598 BH |
908 | status = |
909 | acpi_install_fixed_event_handler(ACPI_EVENT_SLEEP_BUTTON, | |
910 | acpi_device_notify_fixed, | |
911 | device); | |
912 | else | |
913 | status = acpi_install_notify_handler(device->handle, | |
914 | ACPI_DEVICE_NOTIFY, | |
915 | acpi_device_notify, | |
916 | device); | |
917 | ||
918 | if (ACPI_FAILURE(status)) | |
919 | return -EINVAL; | |
920 | return 0; | |
921 | } | |
922 | ||
923 | static void acpi_device_remove_notify_handler(struct acpi_device *device) | |
924 | { | |
ccba2a36 | 925 | if (device->device_type == ACPI_BUS_TYPE_POWER_BUTTON) |
46ec8598 BH |
926 | acpi_remove_fixed_event_handler(ACPI_EVENT_POWER_BUTTON, |
927 | acpi_device_notify_fixed); | |
ccba2a36 | 928 | else if (device->device_type == ACPI_BUS_TYPE_SLEEP_BUTTON) |
46ec8598 BH |
929 | acpi_remove_fixed_event_handler(ACPI_EVENT_SLEEP_BUTTON, |
930 | acpi_device_notify_fixed); | |
931 | else | |
932 | acpi_remove_notify_handler(device->handle, ACPI_DEVICE_NOTIFY, | |
933 | acpi_device_notify); | |
934 | } | |
935 | ||
d9e455f5 | 936 | static int acpi_device_probe(struct device *dev) |
1da177e4 | 937 | { |
5d9464a4 PM |
938 | struct acpi_device *acpi_dev = to_acpi_device(dev); |
939 | struct acpi_driver *acpi_drv = to_acpi_driver(dev->driver); | |
940 | int ret; | |
941 | ||
24071f47 RW |
942 | if (acpi_dev->handler) |
943 | return -EINVAL; | |
944 | ||
d9e455f5 RW |
945 | if (!acpi_drv->ops.add) |
946 | return -ENOSYS; | |
46ec8598 | 947 | |
d9e455f5 RW |
948 | ret = acpi_drv->ops.add(acpi_dev); |
949 | if (ret) | |
950 | return ret; | |
46ec8598 | 951 | |
d9e455f5 RW |
952 | acpi_dev->driver = acpi_drv; |
953 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, | |
954 | "Driver [%s] successfully bound to device [%s]\n", | |
955 | acpi_drv->name, acpi_dev->pnp.bus_id)); | |
956 | ||
957 | if (acpi_drv->ops.notify) { | |
958 | ret = acpi_device_install_notify_handler(acpi_dev); | |
959 | if (ret) { | |
960 | if (acpi_drv->ops.remove) | |
961 | acpi_drv->ops.remove(acpi_dev); | |
962 | ||
963 | acpi_dev->driver = NULL; | |
964 | acpi_dev->driver_data = NULL; | |
965 | return ret; | |
966 | } | |
5d9464a4 | 967 | } |
d9e455f5 RW |
968 | |
969 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Found driver [%s] for device [%s]\n", | |
970 | acpi_drv->name, acpi_dev->pnp.bus_id)); | |
971 | get_device(dev); | |
972 | return 0; | |
5d9464a4 | 973 | } |
1da177e4 | 974 | |
5d9464a4 PM |
975 | static int acpi_device_remove(struct device * dev) |
976 | { | |
977 | struct acpi_device *acpi_dev = to_acpi_device(dev); | |
978 | struct acpi_driver *acpi_drv = acpi_dev->driver; | |
979 | ||
980 | if (acpi_drv) { | |
46ec8598 BH |
981 | if (acpi_drv->ops.notify) |
982 | acpi_device_remove_notify_handler(acpi_dev); | |
5d9464a4 | 983 | if (acpi_drv->ops.remove) |
51fac838 | 984 | acpi_drv->ops.remove(acpi_dev); |
1da177e4 | 985 | } |
5d9464a4 | 986 | acpi_dev->driver = NULL; |
db89b4f0 | 987 | acpi_dev->driver_data = NULL; |
1da177e4 | 988 | |
5d9464a4 | 989 | put_device(dev); |
9e89dde2 ZR |
990 | return 0; |
991 | } | |
1da177e4 | 992 | |
55955aad | 993 | struct bus_type acpi_bus_type = { |
9e89dde2 | 994 | .name = "acpi", |
5d9464a4 PM |
995 | .match = acpi_bus_match, |
996 | .probe = acpi_device_probe, | |
997 | .remove = acpi_device_remove, | |
998 | .uevent = acpi_device_uevent, | |
9e89dde2 ZR |
999 | }; |
1000 | ||
cf860be6 RW |
1001 | int acpi_device_add(struct acpi_device *device, |
1002 | void (*release)(struct device *)) | |
1da177e4 | 1003 | { |
4be44fcd | 1004 | int result; |
e49bd2dd ZR |
1005 | struct acpi_device_bus_id *acpi_device_bus_id, *new_bus_id; |
1006 | int found = 0; | |
66b7ed40 | 1007 | |
d43e167d RW |
1008 | if (device->handle) { |
1009 | acpi_status status; | |
1010 | ||
1011 | status = acpi_attach_data(device->handle, acpi_bus_data_handler, | |
1012 | device); | |
1013 | if (ACPI_FAILURE(status)) { | |
1014 | acpi_handle_err(device->handle, | |
1015 | "Unable to attach device data\n"); | |
1016 | return -ENODEV; | |
1017 | } | |
1018 | } | |
1019 | ||
9e89dde2 ZR |
1020 | /* |
1021 | * Linkage | |
1022 | * ------- | |
1023 | * Link this device to its parent and siblings. | |
1024 | */ | |
1025 | INIT_LIST_HEAD(&device->children); | |
1026 | INIT_LIST_HEAD(&device->node); | |
9e89dde2 | 1027 | INIT_LIST_HEAD(&device->wakeup_list); |
1033f904 LT |
1028 | INIT_LIST_HEAD(&device->physical_node_list); |
1029 | mutex_init(&device->physical_node_lock); | |
bc9b6407 | 1030 | INIT_LIST_HEAD(&device->power_dependent); |
1da177e4 | 1031 | |
e49bd2dd ZR |
1032 | new_bus_id = kzalloc(sizeof(struct acpi_device_bus_id), GFP_KERNEL); |
1033 | if (!new_bus_id) { | |
d43e167d RW |
1034 | pr_err(PREFIX "Memory allocation error\n"); |
1035 | result = -ENOMEM; | |
1036 | goto err_detach; | |
1da177e4 | 1037 | } |
e49bd2dd | 1038 | |
9090589d | 1039 | mutex_lock(&acpi_device_lock); |
e49bd2dd ZR |
1040 | /* |
1041 | * Find suitable bus_id and instance number in acpi_bus_id_list | |
1042 | * If failed, create one and link it into acpi_bus_id_list | |
1043 | */ | |
1044 | list_for_each_entry(acpi_device_bus_id, &acpi_bus_id_list, node) { | |
1131b938 BH |
1045 | if (!strcmp(acpi_device_bus_id->bus_id, |
1046 | acpi_device_hid(device))) { | |
1047 | acpi_device_bus_id->instance_no++; | |
e49bd2dd ZR |
1048 | found = 1; |
1049 | kfree(new_bus_id); | |
1050 | break; | |
1051 | } | |
1da177e4 | 1052 | } |
0c526d96 | 1053 | if (!found) { |
e49bd2dd | 1054 | acpi_device_bus_id = new_bus_id; |
1131b938 | 1055 | strcpy(acpi_device_bus_id->bus_id, acpi_device_hid(device)); |
e49bd2dd ZR |
1056 | acpi_device_bus_id->instance_no = 0; |
1057 | list_add_tail(&acpi_device_bus_id->node, &acpi_bus_id_list); | |
1da177e4 | 1058 | } |
0794469d | 1059 | dev_set_name(&device->dev, "%s:%02x", acpi_device_bus_id->bus_id, acpi_device_bus_id->instance_no); |
1da177e4 | 1060 | |
33b57150 | 1061 | if (device->parent) |
9e89dde2 | 1062 | list_add_tail(&device->node, &device->parent->children); |
33b57150 | 1063 | |
9e89dde2 ZR |
1064 | if (device->wakeup.flags.valid) |
1065 | list_add_tail(&device->wakeup_list, &acpi_wakeup_device_list); | |
9090589d | 1066 | mutex_unlock(&acpi_device_lock); |
1da177e4 | 1067 | |
1890a97a | 1068 | if (device->parent) |
66b7ed40 | 1069 | device->dev.parent = &device->parent->dev; |
1890a97a | 1070 | device->dev.bus = &acpi_bus_type; |
82c7d5ef | 1071 | device->dev.release = release; |
cf860be6 | 1072 | result = device_add(&device->dev); |
0c526d96 | 1073 | if (result) { |
8b12b922 | 1074 | dev_err(&device->dev, "Error registering device\n"); |
d43e167d | 1075 | goto err; |
1da177e4 | 1076 | } |
1da177e4 | 1077 | |
e49bd2dd | 1078 | result = acpi_device_setup_files(device); |
0c526d96 | 1079 | if (result) |
0794469d KS |
1080 | printk(KERN_ERR PREFIX "Error creating sysfs interface for device %s\n", |
1081 | dev_name(&device->dev)); | |
1da177e4 | 1082 | |
1da177e4 | 1083 | return 0; |
d43e167d RW |
1084 | |
1085 | err: | |
9090589d | 1086 | mutex_lock(&acpi_device_lock); |
33b57150 | 1087 | if (device->parent) |
e49bd2dd | 1088 | list_del(&device->node); |
e49bd2dd | 1089 | list_del(&device->wakeup_list); |
9090589d | 1090 | mutex_unlock(&acpi_device_lock); |
d43e167d RW |
1091 | |
1092 | err_detach: | |
1093 | acpi_detach_data(device->handle, acpi_bus_data_handler); | |
e49bd2dd | 1094 | return result; |
1da177e4 LT |
1095 | } |
1096 | ||
b17b537a | 1097 | static void acpi_device_unregister(struct acpi_device *device) |
9e89dde2 | 1098 | { |
9090589d | 1099 | mutex_lock(&acpi_device_lock); |
33b57150 | 1100 | if (device->parent) |
9e89dde2 | 1101 | list_del(&device->node); |
1da177e4 | 1102 | |
9e89dde2 | 1103 | list_del(&device->wakeup_list); |
9090589d | 1104 | mutex_unlock(&acpi_device_lock); |
1da177e4 | 1105 | |
9e89dde2 | 1106 | acpi_detach_data(device->handle, acpi_bus_data_handler); |
1890a97a | 1107 | |
bc9b6407 | 1108 | acpi_power_add_remove_device(device, false); |
f883d9db | 1109 | acpi_device_remove_files(device); |
b1c0f99b RW |
1110 | if (device->remove) |
1111 | device->remove(device); | |
1112 | ||
cf860be6 | 1113 | device_del(&device->dev); |
bc9b6407 | 1114 | /* |
0aa120a0 RW |
1115 | * Transition the device to D3cold to drop the reference counts of all |
1116 | * power resources the device depends on and turn off the ones that have | |
1117 | * no more references. | |
bc9b6407 | 1118 | */ |
0aa120a0 | 1119 | acpi_device_set_power(device, ACPI_STATE_D3_COLD); |
3757b948 | 1120 | device->handle = NULL; |
cf860be6 | 1121 | put_device(&device->dev); |
1da177e4 LT |
1122 | } |
1123 | ||
9e89dde2 ZR |
1124 | /* -------------------------------------------------------------------------- |
1125 | Driver Management | |
1126 | -------------------------------------------------------------------------- */ | |
9e89dde2 ZR |
1127 | /** |
1128 | * acpi_bus_register_driver - register a driver with the ACPI bus | |
1129 | * @driver: driver being registered | |
1130 | * | |
1131 | * Registers a driver with the ACPI bus. Searches the namespace for all | |
1132 | * devices that match the driver's criteria and binds. Returns zero for | |
1133 | * success or a negative error status for failure. | |
1134 | */ | |
1135 | int acpi_bus_register_driver(struct acpi_driver *driver) | |
1da177e4 | 1136 | { |
1890a97a | 1137 | int ret; |
1da177e4 | 1138 | |
9e89dde2 ZR |
1139 | if (acpi_disabled) |
1140 | return -ENODEV; | |
1890a97a PM |
1141 | driver->drv.name = driver->name; |
1142 | driver->drv.bus = &acpi_bus_type; | |
1143 | driver->drv.owner = driver->owner; | |
1da177e4 | 1144 | |
1890a97a PM |
1145 | ret = driver_register(&driver->drv); |
1146 | return ret; | |
9e89dde2 | 1147 | } |
1da177e4 | 1148 | |
9e89dde2 ZR |
1149 | EXPORT_SYMBOL(acpi_bus_register_driver); |
1150 | ||
1151 | /** | |
1152 | * acpi_bus_unregister_driver - unregisters a driver with the APIC bus | |
1153 | * @driver: driver to unregister | |
1154 | * | |
1155 | * Unregisters a driver with the ACPI bus. Searches the namespace for all | |
1156 | * devices that match the driver's criteria and unbinds. | |
1157 | */ | |
1158 | void acpi_bus_unregister_driver(struct acpi_driver *driver) | |
1159 | { | |
1890a97a | 1160 | driver_unregister(&driver->drv); |
9e89dde2 ZR |
1161 | } |
1162 | ||
1163 | EXPORT_SYMBOL(acpi_bus_unregister_driver); | |
1164 | ||
9e89dde2 ZR |
1165 | /* -------------------------------------------------------------------------- |
1166 | Device Enumeration | |
1167 | -------------------------------------------------------------------------- */ | |
5c478f49 BH |
1168 | static struct acpi_device *acpi_bus_get_parent(acpi_handle handle) |
1169 | { | |
456de893 | 1170 | struct acpi_device *device = NULL; |
5c478f49 | 1171 | acpi_status status; |
5c478f49 BH |
1172 | |
1173 | /* | |
1174 | * Fixed hardware devices do not appear in the namespace and do not | |
1175 | * have handles, but we fabricate acpi_devices for them, so we have | |
1176 | * to deal with them specially. | |
1177 | */ | |
456de893 | 1178 | if (!handle) |
5c478f49 BH |
1179 | return acpi_root; |
1180 | ||
1181 | do { | |
1182 | status = acpi_get_parent(handle, &handle); | |
5c478f49 | 1183 | if (ACPI_FAILURE(status)) |
456de893 RW |
1184 | return status == AE_NULL_ENTRY ? NULL : acpi_root; |
1185 | } while (acpi_bus_get_device(handle, &device)); | |
1186 | return device; | |
5c478f49 BH |
1187 | } |
1188 | ||
9e89dde2 ZR |
1189 | acpi_status |
1190 | acpi_bus_get_ejd(acpi_handle handle, acpi_handle *ejd) | |
1191 | { | |
1192 | acpi_status status; | |
1193 | acpi_handle tmp; | |
1194 | struct acpi_buffer buffer = {ACPI_ALLOCATE_BUFFER, NULL}; | |
1195 | union acpi_object *obj; | |
1196 | ||
1197 | status = acpi_get_handle(handle, "_EJD", &tmp); | |
1198 | if (ACPI_FAILURE(status)) | |
1199 | return status; | |
1200 | ||
1201 | status = acpi_evaluate_object(handle, "_EJD", NULL, &buffer); | |
1202 | if (ACPI_SUCCESS(status)) { | |
1203 | obj = buffer.pointer; | |
3b5fee59 HM |
1204 | status = acpi_get_handle(ACPI_ROOT_OBJECT, obj->string.pointer, |
1205 | ejd); | |
9e89dde2 ZR |
1206 | kfree(buffer.pointer); |
1207 | } | |
1208 | return status; | |
1209 | } | |
1210 | EXPORT_SYMBOL_GPL(acpi_bus_get_ejd); | |
1211 | ||
8e4319c4 | 1212 | void acpi_bus_data_handler(acpi_handle handle, void *context) |
9e89dde2 ZR |
1213 | { |
1214 | ||
1215 | /* TBD */ | |
1216 | ||
1217 | return; | |
1218 | } | |
1219 | ||
e88c9c60 RW |
1220 | static int acpi_bus_extract_wakeup_device_power_package(acpi_handle handle, |
1221 | struct acpi_device_wakeup *wakeup) | |
9e89dde2 | 1222 | { |
b581a7f9 RW |
1223 | struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; |
1224 | union acpi_object *package = NULL; | |
9e89dde2 | 1225 | union acpi_object *element = NULL; |
b581a7f9 | 1226 | acpi_status status; |
e88c9c60 | 1227 | int err = -ENODATA; |
9e89dde2 | 1228 | |
b581a7f9 | 1229 | if (!wakeup) |
e88c9c60 | 1230 | return -EINVAL; |
9e89dde2 | 1231 | |
993cbe59 | 1232 | INIT_LIST_HEAD(&wakeup->resources); |
9e89dde2 | 1233 | |
b581a7f9 RW |
1234 | /* _PRW */ |
1235 | status = acpi_evaluate_object(handle, "_PRW", NULL, &buffer); | |
1236 | if (ACPI_FAILURE(status)) { | |
1237 | ACPI_EXCEPTION((AE_INFO, status, "Evaluating _PRW")); | |
e88c9c60 | 1238 | return err; |
b581a7f9 RW |
1239 | } |
1240 | ||
1241 | package = (union acpi_object *)buffer.pointer; | |
1242 | ||
e88c9c60 | 1243 | if (!package || package->package.count < 2) |
b581a7f9 | 1244 | goto out; |
b581a7f9 | 1245 | |
9e89dde2 | 1246 | element = &(package->package.elements[0]); |
e88c9c60 | 1247 | if (!element) |
b581a7f9 | 1248 | goto out; |
e88c9c60 | 1249 | |
9e89dde2 ZR |
1250 | if (element->type == ACPI_TYPE_PACKAGE) { |
1251 | if ((element->package.count < 2) || | |
1252 | (element->package.elements[0].type != | |
1253 | ACPI_TYPE_LOCAL_REFERENCE) | |
e88c9c60 | 1254 | || (element->package.elements[1].type != ACPI_TYPE_INTEGER)) |
b581a7f9 | 1255 | goto out; |
e88c9c60 | 1256 | |
b581a7f9 | 1257 | wakeup->gpe_device = |
9e89dde2 | 1258 | element->package.elements[0].reference.handle; |
b581a7f9 | 1259 | wakeup->gpe_number = |
9e89dde2 ZR |
1260 | (u32) element->package.elements[1].integer.value; |
1261 | } else if (element->type == ACPI_TYPE_INTEGER) { | |
b581a7f9 RW |
1262 | wakeup->gpe_device = NULL; |
1263 | wakeup->gpe_number = element->integer.value; | |
1264 | } else { | |
b581a7f9 RW |
1265 | goto out; |
1266 | } | |
9e89dde2 ZR |
1267 | |
1268 | element = &(package->package.elements[1]); | |
e88c9c60 | 1269 | if (element->type != ACPI_TYPE_INTEGER) |
b581a7f9 | 1270 | goto out; |
e88c9c60 | 1271 | |
b581a7f9 | 1272 | wakeup->sleep_state = element->integer.value; |
9e89dde2 | 1273 | |
e88c9c60 RW |
1274 | err = acpi_extract_power_resources(package, 2, &wakeup->resources); |
1275 | if (err) | |
b581a7f9 | 1276 | goto out; |
9e89dde2 | 1277 | |
0596a52b RW |
1278 | if (!list_empty(&wakeup->resources)) { |
1279 | int sleep_state; | |
9e89dde2 | 1280 | |
b5d667eb RW |
1281 | err = acpi_power_wakeup_list_init(&wakeup->resources, |
1282 | &sleep_state); | |
1283 | if (err) { | |
1284 | acpi_handle_warn(handle, "Retrieving current states " | |
1285 | "of wakeup power resources failed\n"); | |
1286 | acpi_power_resources_list_free(&wakeup->resources); | |
1287 | goto out; | |
1288 | } | |
0596a52b RW |
1289 | if (sleep_state < wakeup->sleep_state) { |
1290 | acpi_handle_warn(handle, "Overriding _PRW sleep state " | |
1291 | "(S%d) by S%d from power resources\n", | |
1292 | (int)wakeup->sleep_state, sleep_state); | |
1293 | wakeup->sleep_state = sleep_state; | |
1294 | } | |
1295 | } | |
bba63a29 | 1296 | acpi_setup_gpe_for_wake(handle, wakeup->gpe_device, wakeup->gpe_number); |
9874647b | 1297 | |
b581a7f9 RW |
1298 | out: |
1299 | kfree(buffer.pointer); | |
e88c9c60 | 1300 | return err; |
1da177e4 LT |
1301 | } |
1302 | ||
f517709d | 1303 | static void acpi_bus_set_run_wake_flags(struct acpi_device *device) |
1da177e4 | 1304 | { |
29b71a1c | 1305 | struct acpi_device_id button_device_ids[] = { |
29b71a1c | 1306 | {"PNP0C0C", 0}, |
b7e38304 | 1307 | {"PNP0C0D", 0}, |
29b71a1c TR |
1308 | {"PNP0C0E", 0}, |
1309 | {"", 0}, | |
1310 | }; | |
f517709d RW |
1311 | acpi_status status; |
1312 | acpi_event_status event_status; | |
1313 | ||
b67ea761 | 1314 | device->wakeup.flags.notifier_present = 0; |
f517709d RW |
1315 | |
1316 | /* Power button, Lid switch always enable wakeup */ | |
1317 | if (!acpi_match_device_ids(device, button_device_ids)) { | |
1318 | device->wakeup.flags.run_wake = 1; | |
b7e38304 ZR |
1319 | if (!acpi_match_device_ids(device, &button_device_ids[1])) { |
1320 | /* Do not use Lid/sleep button for S5 wakeup */ | |
1321 | if (device->wakeup.sleep_state == ACPI_STATE_S5) | |
1322 | device->wakeup.sleep_state = ACPI_STATE_S4; | |
1323 | } | |
f2b56bc8 | 1324 | device_set_wakeup_capable(&device->dev, true); |
f517709d RW |
1325 | return; |
1326 | } | |
1327 | ||
e8e18c95 RW |
1328 | status = acpi_get_gpe_status(device->wakeup.gpe_device, |
1329 | device->wakeup.gpe_number, | |
1330 | &event_status); | |
f517709d RW |
1331 | if (status == AE_OK) |
1332 | device->wakeup.flags.run_wake = | |
1333 | !!(event_status & ACPI_EVENT_FLAG_HANDLE); | |
1334 | } | |
1335 | ||
d57d09a4 | 1336 | static void acpi_bus_get_wakeup_device_flags(struct acpi_device *device) |
f517709d | 1337 | { |
d57d09a4 | 1338 | acpi_handle temp; |
f517709d | 1339 | acpi_status status = 0; |
e88c9c60 | 1340 | int err; |
29b71a1c | 1341 | |
d57d09a4 RW |
1342 | /* Presence of _PRW indicates wake capable */ |
1343 | status = acpi_get_handle(device->handle, "_PRW", &temp); | |
1344 | if (ACPI_FAILURE(status)) | |
1345 | return; | |
1346 | ||
e88c9c60 RW |
1347 | err = acpi_bus_extract_wakeup_device_power_package(device->handle, |
1348 | &device->wakeup); | |
1349 | if (err) { | |
1350 | dev_err(&device->dev, "_PRW evaluation error: %d\n", err); | |
d57d09a4 | 1351 | return; |
9e89dde2 | 1352 | } |
1da177e4 | 1353 | |
9e89dde2 | 1354 | device->wakeup.flags.valid = 1; |
9b83ccd2 | 1355 | device->wakeup.prepare_count = 0; |
f517709d | 1356 | acpi_bus_set_run_wake_flags(device); |
729b2bdb ZY |
1357 | /* Call _PSW/_DSW object to disable its ability to wake the sleeping |
1358 | * system for the ACPI device with the _PRW object. | |
1359 | * The _PSW object is depreciated in ACPI 3.0 and is replaced by _DSW. | |
1360 | * So it is necessary to call _DSW object first. Only when it is not | |
1361 | * present will the _PSW object used. | |
1362 | */ | |
e88c9c60 RW |
1363 | err = acpi_device_sleep_wake(device, 0, 0, 0); |
1364 | if (err) | |
77e76609 RW |
1365 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
1366 | "error in _DSW or _PSW evaluation\n")); | |
1da177e4 | 1367 | } |
1da177e4 | 1368 | |
f33ce568 RW |
1369 | static void acpi_bus_init_power_state(struct acpi_device *device, int state) |
1370 | { | |
1371 | struct acpi_device_power_state *ps = &device->power.states[state]; | |
ef85bdbe RW |
1372 | char pathname[5] = { '_', 'P', 'R', '0' + state, '\0' }; |
1373 | struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; | |
f33ce568 RW |
1374 | acpi_handle handle; |
1375 | acpi_status status; | |
bf325f95 | 1376 | |
f33ce568 RW |
1377 | INIT_LIST_HEAD(&ps->resources); |
1378 | ||
ef85bdbe RW |
1379 | /* Evaluate "_PRx" to get referenced power resources */ |
1380 | status = acpi_evaluate_object(device->handle, pathname, NULL, &buffer); | |
1381 | if (ACPI_SUCCESS(status)) { | |
1382 | union acpi_object *package = buffer.pointer; | |
1383 | ||
1384 | if (buffer.length && package | |
1385 | && package->type == ACPI_TYPE_PACKAGE | |
1386 | && package->package.count) { | |
e88c9c60 RW |
1387 | int err = acpi_extract_power_resources(package, 0, |
1388 | &ps->resources); | |
1389 | if (!err) | |
ef85bdbe | 1390 | device->power.flags.power_resources = 1; |
f33ce568 | 1391 | } |
ef85bdbe | 1392 | ACPI_FREE(buffer.pointer); |
f33ce568 RW |
1393 | } |
1394 | ||
1395 | /* Evaluate "_PSx" to see if we can do explicit sets */ | |
ef85bdbe RW |
1396 | pathname[2] = 'S'; |
1397 | status = acpi_get_handle(device->handle, pathname, &handle); | |
f33ce568 RW |
1398 | if (ACPI_SUCCESS(status)) |
1399 | ps->flags.explicit_set = 1; | |
1400 | ||
1401 | /* | |
1402 | * State is valid if there are means to put the device into it. | |
1403 | * D3hot is only valid if _PR3 present. | |
1404 | */ | |
ef85bdbe | 1405 | if (!list_empty(&ps->resources) |
f33ce568 RW |
1406 | || (ps->flags.explicit_set && state < ACPI_STATE_D3_HOT)) { |
1407 | ps->flags.valid = 1; | |
1408 | ps->flags.os_accessible = 1; | |
1409 | } | |
1410 | ||
1411 | ps->power = -1; /* Unknown - driver assigned */ | |
1412 | ps->latency = -1; /* Unknown - driver assigned */ | |
1413 | } | |
1414 | ||
d43e167d | 1415 | static void acpi_bus_get_power_flags(struct acpi_device *device) |
1da177e4 | 1416 | { |
8bc5053b RW |
1417 | acpi_status status; |
1418 | acpi_handle handle; | |
1419 | u32 i; | |
1a365616 | 1420 | |
d43e167d RW |
1421 | /* Presence of _PS0|_PR0 indicates 'power manageable' */ |
1422 | status = acpi_get_handle(device->handle, "_PS0", &handle); | |
1423 | if (ACPI_FAILURE(status)) { | |
1424 | status = acpi_get_handle(device->handle, "_PR0", &handle); | |
1425 | if (ACPI_FAILURE(status)) | |
1426 | return; | |
1427 | } | |
1a365616 | 1428 | |
d43e167d | 1429 | device->flags.power_manageable = 1; |
4be44fcd | 1430 | |
9e89dde2 ZR |
1431 | /* |
1432 | * Power Management Flags | |
1433 | */ | |
1434 | status = acpi_get_handle(device->handle, "_PSC", &handle); | |
1435 | if (ACPI_SUCCESS(status)) | |
1436 | device->power.flags.explicit_get = 1; | |
1437 | status = acpi_get_handle(device->handle, "_IRC", &handle); | |
1438 | if (ACPI_SUCCESS(status)) | |
1439 | device->power.flags.inrush_current = 1; | |
1da177e4 | 1440 | |
9e89dde2 ZR |
1441 | /* |
1442 | * Enumerate supported power management states | |
1443 | */ | |
f33ce568 RW |
1444 | for (i = ACPI_STATE_D0; i <= ACPI_STATE_D3_HOT; i++) |
1445 | acpi_bus_init_power_state(device, i); | |
bf325f95 | 1446 | |
0b224527 | 1447 | INIT_LIST_HEAD(&device->power.states[ACPI_STATE_D3_COLD].resources); |
1da177e4 | 1448 | |
9e89dde2 ZR |
1449 | /* Set defaults for D0 and D3 states (always valid) */ |
1450 | device->power.states[ACPI_STATE_D0].flags.valid = 1; | |
1451 | device->power.states[ACPI_STATE_D0].power = 100; | |
1452 | device->power.states[ACPI_STATE_D3].flags.valid = 1; | |
1453 | device->power.states[ACPI_STATE_D3].power = 0; | |
c8f7a62c | 1454 | |
5c7dd710 RW |
1455 | /* Set D3cold's explicit_set flag if _PS3 exists. */ |
1456 | if (device->power.states[ACPI_STATE_D3_HOT].flags.explicit_set) | |
1457 | device->power.states[ACPI_STATE_D3_COLD].flags.explicit_set = 1; | |
1458 | ||
1399dfcd AL |
1459 | /* Presence of _PS3 or _PRx means we can put the device into D3 cold */ |
1460 | if (device->power.states[ACPI_STATE_D3_HOT].flags.explicit_set || | |
1461 | device->power.flags.power_resources) | |
1462 | device->power.states[ACPI_STATE_D3_COLD].flags.os_accessible = 1; | |
1463 | ||
b3785492 RW |
1464 | if (acpi_bus_init_power(device)) { |
1465 | acpi_free_power_resources_lists(device); | |
1466 | device->flags.power_manageable = 0; | |
1467 | } | |
9e89dde2 | 1468 | } |
c8f7a62c | 1469 | |
d43e167d | 1470 | static void acpi_bus_get_flags(struct acpi_device *device) |
1da177e4 | 1471 | { |
4be44fcd LB |
1472 | acpi_status status = AE_OK; |
1473 | acpi_handle temp = NULL; | |
1da177e4 | 1474 | |
1da177e4 LT |
1475 | /* Presence of _STA indicates 'dynamic_status' */ |
1476 | status = acpi_get_handle(device->handle, "_STA", &temp); | |
1477 | if (ACPI_SUCCESS(status)) | |
1478 | device->flags.dynamic_status = 1; | |
1479 | ||
1da177e4 LT |
1480 | /* Presence of _RMV indicates 'removable' */ |
1481 | status = acpi_get_handle(device->handle, "_RMV", &temp); | |
1482 | if (ACPI_SUCCESS(status)) | |
1483 | device->flags.removable = 1; | |
1484 | ||
1485 | /* Presence of _EJD|_EJ0 indicates 'ejectable' */ | |
1486 | status = acpi_get_handle(device->handle, "_EJD", &temp); | |
1487 | if (ACPI_SUCCESS(status)) | |
1488 | device->flags.ejectable = 1; | |
1489 | else { | |
1490 | status = acpi_get_handle(device->handle, "_EJ0", &temp); | |
1491 | if (ACPI_SUCCESS(status)) | |
1492 | device->flags.ejectable = 1; | |
1493 | } | |
1da177e4 LT |
1494 | } |
1495 | ||
c7bcb4e9 | 1496 | static void acpi_device_get_busid(struct acpi_device *device) |
1da177e4 | 1497 | { |
4be44fcd LB |
1498 | char bus_id[5] = { '?', 0 }; |
1499 | struct acpi_buffer buffer = { sizeof(bus_id), bus_id }; | |
1500 | int i = 0; | |
1da177e4 LT |
1501 | |
1502 | /* | |
1503 | * Bus ID | |
1504 | * ------ | |
1505 | * The device's Bus ID is simply the object name. | |
1506 | * TBD: Shouldn't this value be unique (within the ACPI namespace)? | |
1507 | */ | |
859ac9a4 | 1508 | if (ACPI_IS_ROOT_DEVICE(device)) { |
1da177e4 | 1509 | strcpy(device->pnp.bus_id, "ACPI"); |
859ac9a4 BH |
1510 | return; |
1511 | } | |
1512 | ||
1513 | switch (device->device_type) { | |
1da177e4 LT |
1514 | case ACPI_BUS_TYPE_POWER_BUTTON: |
1515 | strcpy(device->pnp.bus_id, "PWRF"); | |
1516 | break; | |
1517 | case ACPI_BUS_TYPE_SLEEP_BUTTON: | |
1518 | strcpy(device->pnp.bus_id, "SLPF"); | |
1519 | break; | |
1520 | default: | |
66b7ed40 | 1521 | acpi_get_name(device->handle, ACPI_SINGLE_NAME, &buffer); |
1da177e4 LT |
1522 | /* Clean up trailing underscores (if any) */ |
1523 | for (i = 3; i > 1; i--) { | |
1524 | if (bus_id[i] == '_') | |
1525 | bus_id[i] = '\0'; | |
1526 | else | |
1527 | break; | |
1528 | } | |
1529 | strcpy(device->pnp.bus_id, bus_id); | |
1530 | break; | |
1531 | } | |
1532 | } | |
1533 | ||
54735266 | 1534 | /* |
d4e1a692 | 1535 | * acpi_bay_match - see if an acpi object is an ejectable driver bay |
54735266 ZR |
1536 | * |
1537 | * If an acpi object is ejectable and has one of the ACPI ATA methods defined, | |
1538 | * then we can safely call it an ejectable drive bay | |
1539 | */ | |
d4e1a692 TK |
1540 | static int acpi_bay_match(acpi_handle handle) |
1541 | { | |
54735266 | 1542 | acpi_status status; |
54735266 ZR |
1543 | acpi_handle tmp; |
1544 | acpi_handle phandle; | |
1545 | ||
54735266 ZR |
1546 | status = acpi_get_handle(handle, "_EJ0", &tmp); |
1547 | if (ACPI_FAILURE(status)) | |
1548 | return -ENODEV; | |
1549 | ||
1550 | if ((ACPI_SUCCESS(acpi_get_handle(handle, "_GTF", &tmp))) || | |
1551 | (ACPI_SUCCESS(acpi_get_handle(handle, "_GTM", &tmp))) || | |
1552 | (ACPI_SUCCESS(acpi_get_handle(handle, "_STM", &tmp))) || | |
1553 | (ACPI_SUCCESS(acpi_get_handle(handle, "_SDD", &tmp)))) | |
1554 | return 0; | |
1555 | ||
1556 | if (acpi_get_parent(handle, &phandle)) | |
1557 | return -ENODEV; | |
1558 | ||
1559 | if ((ACPI_SUCCESS(acpi_get_handle(phandle, "_GTF", &tmp))) || | |
1560 | (ACPI_SUCCESS(acpi_get_handle(phandle, "_GTM", &tmp))) || | |
1561 | (ACPI_SUCCESS(acpi_get_handle(phandle, "_STM", &tmp))) || | |
1562 | (ACPI_SUCCESS(acpi_get_handle(phandle, "_SDD", &tmp)))) | |
1563 | return 0; | |
1564 | ||
1565 | return -ENODEV; | |
1566 | } | |
1567 | ||
3620f2f2 | 1568 | /* |
d4e1a692 | 1569 | * acpi_dock_match - see if an acpi object has a _DCK method |
3620f2f2 | 1570 | */ |
d4e1a692 | 1571 | static int acpi_dock_match(acpi_handle handle) |
3620f2f2 FS |
1572 | { |
1573 | acpi_handle tmp; | |
d4e1a692 | 1574 | return acpi_get_handle(handle, "_DCK", &tmp); |
3620f2f2 FS |
1575 | } |
1576 | ||
620e112c | 1577 | const char *acpi_device_hid(struct acpi_device *device) |
15b8dd53 | 1578 | { |
7f47fa6c | 1579 | struct acpi_hardware_id *hid; |
15b8dd53 | 1580 | |
2b2ae7c7 TR |
1581 | if (list_empty(&device->pnp.ids)) |
1582 | return dummy_hid; | |
1583 | ||
7f47fa6c BH |
1584 | hid = list_first_entry(&device->pnp.ids, struct acpi_hardware_id, list); |
1585 | return hid->id; | |
1586 | } | |
1587 | EXPORT_SYMBOL(acpi_device_hid); | |
15b8dd53 | 1588 | |
d4e1a692 | 1589 | static void acpi_add_id(struct acpi_device_pnp *pnp, const char *dev_id) |
7f47fa6c BH |
1590 | { |
1591 | struct acpi_hardware_id *id; | |
15b8dd53 | 1592 | |
7f47fa6c BH |
1593 | id = kmalloc(sizeof(*id), GFP_KERNEL); |
1594 | if (!id) | |
1595 | return; | |
15b8dd53 | 1596 | |
581de59e | 1597 | id->id = kstrdup(dev_id, GFP_KERNEL); |
7f47fa6c BH |
1598 | if (!id->id) { |
1599 | kfree(id); | |
1600 | return; | |
15b8dd53 BM |
1601 | } |
1602 | ||
d4e1a692 TK |
1603 | list_add_tail(&id->list, &pnp->ids); |
1604 | pnp->type.hardware_id = 1; | |
15b8dd53 BM |
1605 | } |
1606 | ||
222e82ac DW |
1607 | /* |
1608 | * Old IBM workstations have a DSDT bug wherein the SMBus object | |
1609 | * lacks the SMBUS01 HID and the methods do not have the necessary "_" | |
1610 | * prefix. Work around this. | |
1611 | */ | |
d4e1a692 | 1612 | static int acpi_ibm_smbus_match(acpi_handle handle) |
222e82ac DW |
1613 | { |
1614 | acpi_handle h_dummy; | |
1615 | struct acpi_buffer path = {ACPI_ALLOCATE_BUFFER, NULL}; | |
1616 | int result; | |
1617 | ||
1618 | if (!dmi_name_in_vendors("IBM")) | |
1619 | return -ENODEV; | |
1620 | ||
1621 | /* Look for SMBS object */ | |
d4e1a692 | 1622 | result = acpi_get_name(handle, ACPI_SINGLE_NAME, &path); |
222e82ac DW |
1623 | if (result) |
1624 | return result; | |
1625 | ||
1626 | if (strcmp("SMBS", path.pointer)) { | |
1627 | result = -ENODEV; | |
1628 | goto out; | |
1629 | } | |
1630 | ||
1631 | /* Does it have the necessary (but misnamed) methods? */ | |
1632 | result = -ENODEV; | |
d4e1a692 TK |
1633 | if (ACPI_SUCCESS(acpi_get_handle(handle, "SBI", &h_dummy)) && |
1634 | ACPI_SUCCESS(acpi_get_handle(handle, "SBR", &h_dummy)) && | |
1635 | ACPI_SUCCESS(acpi_get_handle(handle, "SBW", &h_dummy))) | |
222e82ac DW |
1636 | result = 0; |
1637 | out: | |
1638 | kfree(path.pointer); | |
1639 | return result; | |
1640 | } | |
1641 | ||
c0af4175 TK |
1642 | static void acpi_set_pnp_ids(acpi_handle handle, struct acpi_device_pnp *pnp, |
1643 | int device_type) | |
1da177e4 | 1644 | { |
4be44fcd | 1645 | acpi_status status; |
57f3674f | 1646 | struct acpi_device_info *info; |
78e25fef | 1647 | struct acpi_pnp_device_id_list *cid_list; |
7f47fa6c | 1648 | int i; |
1da177e4 | 1649 | |
c0af4175 | 1650 | switch (device_type) { |
1da177e4 | 1651 | case ACPI_BUS_TYPE_DEVICE: |
c0af4175 TK |
1652 | if (handle == ACPI_ROOT_OBJECT) { |
1653 | acpi_add_id(pnp, ACPI_SYSTEM_HID); | |
859ac9a4 BH |
1654 | break; |
1655 | } | |
1656 | ||
c0af4175 | 1657 | status = acpi_get_object_info(handle, &info); |
1da177e4 | 1658 | if (ACPI_FAILURE(status)) { |
c0af4175 TK |
1659 | pr_err(PREFIX "%s: Error reading device info\n", |
1660 | __func__); | |
1da177e4 LT |
1661 | return; |
1662 | } | |
1663 | ||
1da177e4 | 1664 | if (info->valid & ACPI_VALID_HID) |
c0af4175 | 1665 | acpi_add_id(pnp, info->hardware_id.string); |
57f3674f | 1666 | if (info->valid & ACPI_VALID_CID) { |
15b8dd53 | 1667 | cid_list = &info->compatible_id_list; |
57f3674f | 1668 | for (i = 0; i < cid_list->count; i++) |
c0af4175 | 1669 | acpi_add_id(pnp, cid_list->ids[i].string); |
57f3674f | 1670 | } |
1da177e4 | 1671 | if (info->valid & ACPI_VALID_ADR) { |
c0af4175 TK |
1672 | pnp->bus_address = info->address; |
1673 | pnp->type.bus_address = 1; | |
1da177e4 | 1674 | } |
ccf78040 | 1675 | if (info->valid & ACPI_VALID_UID) |
c0af4175 | 1676 | pnp->unique_id = kstrdup(info->unique_id.string, |
ccf78040 | 1677 | GFP_KERNEL); |
ae843332 | 1678 | |
a83893ae BH |
1679 | kfree(info); |
1680 | ||
57f3674f BH |
1681 | /* |
1682 | * Some devices don't reliably have _HIDs & _CIDs, so add | |
1683 | * synthetic HIDs to make sure drivers can find them. | |
1684 | */ | |
c0af4175 TK |
1685 | if (acpi_is_video_device(handle)) |
1686 | acpi_add_id(pnp, ACPI_VIDEO_HID); | |
1687 | else if (ACPI_SUCCESS(acpi_bay_match(handle))) | |
1688 | acpi_add_id(pnp, ACPI_BAY_HID); | |
1689 | else if (ACPI_SUCCESS(acpi_dock_match(handle))) | |
1690 | acpi_add_id(pnp, ACPI_DOCK_HID); | |
1691 | else if (!acpi_ibm_smbus_match(handle)) | |
1692 | acpi_add_id(pnp, ACPI_SMBUS_IBM_HID); | |
1693 | else if (list_empty(&pnp->ids) && handle == ACPI_ROOT_OBJECT) { | |
1694 | acpi_add_id(pnp, ACPI_BUS_HID); /* \_SB, LNXSYBUS */ | |
1695 | strcpy(pnp->device_name, ACPI_BUS_DEVICE_NAME); | |
1696 | strcpy(pnp->device_class, ACPI_BUS_CLASS); | |
b7b30de5 | 1697 | } |
54735266 | 1698 | |
1da177e4 LT |
1699 | break; |
1700 | case ACPI_BUS_TYPE_POWER: | |
c0af4175 | 1701 | acpi_add_id(pnp, ACPI_POWER_HID); |
1da177e4 LT |
1702 | break; |
1703 | case ACPI_BUS_TYPE_PROCESSOR: | |
c0af4175 | 1704 | acpi_add_id(pnp, ACPI_PROCESSOR_OBJECT_HID); |
1da177e4 | 1705 | break; |
1da177e4 | 1706 | case ACPI_BUS_TYPE_THERMAL: |
c0af4175 | 1707 | acpi_add_id(pnp, ACPI_THERMAL_HID); |
1da177e4 LT |
1708 | break; |
1709 | case ACPI_BUS_TYPE_POWER_BUTTON: | |
c0af4175 | 1710 | acpi_add_id(pnp, ACPI_BUTTON_HID_POWERF); |
1da177e4 LT |
1711 | break; |
1712 | case ACPI_BUS_TYPE_SLEEP_BUTTON: | |
c0af4175 | 1713 | acpi_add_id(pnp, ACPI_BUTTON_HID_SLEEPF); |
1da177e4 LT |
1714 | break; |
1715 | } | |
1da177e4 LT |
1716 | } |
1717 | ||
c0af4175 TK |
1718 | void acpi_free_pnp_ids(struct acpi_device_pnp *pnp) |
1719 | { | |
1720 | struct acpi_hardware_id *id, *tmp; | |
1721 | ||
1722 | list_for_each_entry_safe(id, tmp, &pnp->ids, list) { | |
1723 | kfree(id->id); | |
1724 | kfree(id); | |
1725 | } | |
1726 | kfree(pnp->unique_id); | |
1727 | } | |
1728 | ||
82c7d5ef RW |
1729 | void acpi_init_device_object(struct acpi_device *device, acpi_handle handle, |
1730 | int type, unsigned long long sta) | |
1da177e4 | 1731 | { |
d43e167d RW |
1732 | INIT_LIST_HEAD(&device->pnp.ids); |
1733 | device->device_type = type; | |
1734 | device->handle = handle; | |
1735 | device->parent = acpi_bus_get_parent(handle); | |
1736 | STRUCT_TO_INT(device->status) = sta; | |
1737 | acpi_device_get_busid(device); | |
c0af4175 | 1738 | acpi_set_pnp_ids(handle, &device->pnp, type); |
d43e167d | 1739 | acpi_bus_get_flags(device); |
2c0d4fe0 | 1740 | device->flags.match_driver = false; |
cf860be6 RW |
1741 | device_initialize(&device->dev); |
1742 | dev_set_uevent_suppress(&device->dev, true); | |
1743 | } | |
bc3b0772 | 1744 | |
cf860be6 RW |
1745 | void acpi_device_add_finalize(struct acpi_device *device) |
1746 | { | |
2c0d4fe0 | 1747 | device->flags.match_driver = true; |
cf860be6 RW |
1748 | dev_set_uevent_suppress(&device->dev, false); |
1749 | kobject_uevent(&device->dev.kobj, KOBJ_ADD); | |
1da177e4 LT |
1750 | } |
1751 | ||
5c478f49 BH |
1752 | static int acpi_add_single_object(struct acpi_device **child, |
1753 | acpi_handle handle, int type, | |
2c0d4fe0 | 1754 | unsigned long long sta) |
1da177e4 | 1755 | { |
77c24888 BH |
1756 | int result; |
1757 | struct acpi_device *device; | |
29aaefa6 | 1758 | struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; |
1da177e4 | 1759 | |
36bcbec7 | 1760 | device = kzalloc(sizeof(struct acpi_device), GFP_KERNEL); |
1da177e4 | 1761 | if (!device) { |
6468463a | 1762 | printk(KERN_ERR PREFIX "Memory allocation error\n"); |
d550d98d | 1763 | return -ENOMEM; |
1da177e4 | 1764 | } |
1da177e4 | 1765 | |
d43e167d RW |
1766 | acpi_init_device_object(device, handle, type, sta); |
1767 | acpi_bus_get_power_flags(device); | |
d57d09a4 | 1768 | acpi_bus_get_wakeup_device_flags(device); |
1da177e4 | 1769 | |
cf860be6 | 1770 | result = acpi_device_add(device, acpi_device_release); |
d43e167d | 1771 | if (result) { |
718fb0de | 1772 | acpi_device_release(&device->dev); |
d43e167d RW |
1773 | return result; |
1774 | } | |
1da177e4 | 1775 | |
d43e167d | 1776 | acpi_power_add_remove_device(device, true); |
cf860be6 | 1777 | acpi_device_add_finalize(device); |
d43e167d RW |
1778 | acpi_get_name(handle, ACPI_FULL_PATHNAME, &buffer); |
1779 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Added %s [%s] parent %s\n", | |
1780 | dev_name(&device->dev), (char *) buffer.pointer, | |
1781 | device->parent ? dev_name(&device->parent->dev) : "(null)")); | |
1782 | kfree(buffer.pointer); | |
1783 | *child = device; | |
1784 | return 0; | |
bf325f95 RW |
1785 | } |
1786 | ||
778cbc1d BH |
1787 | static int acpi_bus_type_and_status(acpi_handle handle, int *type, |
1788 | unsigned long long *sta) | |
1da177e4 | 1789 | { |
778cbc1d BH |
1790 | acpi_status status; |
1791 | acpi_object_type acpi_type; | |
1da177e4 | 1792 | |
778cbc1d | 1793 | status = acpi_get_type(handle, &acpi_type); |
51a85faf | 1794 | if (ACPI_FAILURE(status)) |
778cbc1d | 1795 | return -ENODEV; |
4be44fcd | 1796 | |
778cbc1d | 1797 | switch (acpi_type) { |
51a85faf BH |
1798 | case ACPI_TYPE_ANY: /* for ACPI_ROOT_OBJECT */ |
1799 | case ACPI_TYPE_DEVICE: | |
778cbc1d BH |
1800 | *type = ACPI_BUS_TYPE_DEVICE; |
1801 | status = acpi_bus_get_status_handle(handle, sta); | |
1802 | if (ACPI_FAILURE(status)) | |
1803 | return -ENODEV; | |
51a85faf BH |
1804 | break; |
1805 | case ACPI_TYPE_PROCESSOR: | |
778cbc1d BH |
1806 | *type = ACPI_BUS_TYPE_PROCESSOR; |
1807 | status = acpi_bus_get_status_handle(handle, sta); | |
1808 | if (ACPI_FAILURE(status)) | |
1809 | return -ENODEV; | |
51a85faf BH |
1810 | break; |
1811 | case ACPI_TYPE_THERMAL: | |
778cbc1d BH |
1812 | *type = ACPI_BUS_TYPE_THERMAL; |
1813 | *sta = ACPI_STA_DEFAULT; | |
51a85faf BH |
1814 | break; |
1815 | case ACPI_TYPE_POWER: | |
778cbc1d BH |
1816 | *type = ACPI_BUS_TYPE_POWER; |
1817 | *sta = ACPI_STA_DEFAULT; | |
51a85faf BH |
1818 | break; |
1819 | default: | |
778cbc1d | 1820 | return -ENODEV; |
51a85faf | 1821 | } |
1da177e4 | 1822 | |
778cbc1d BH |
1823 | return 0; |
1824 | } | |
1825 | ||
4b59cc1f RW |
1826 | static bool acpi_scan_handler_matching(struct acpi_scan_handler *handler, |
1827 | char *idstr, | |
1828 | const struct acpi_device_id **matchid) | |
1829 | { | |
1830 | const struct acpi_device_id *devid; | |
1831 | ||
1832 | for (devid = handler->ids; devid->id[0]; devid++) | |
1833 | if (!strcmp((char *)devid->id, idstr)) { | |
1834 | if (matchid) | |
1835 | *matchid = devid; | |
1836 | ||
1837 | return true; | |
1838 | } | |
1839 | ||
1840 | return false; | |
1841 | } | |
1842 | ||
6b772e8f TK |
1843 | static struct acpi_scan_handler *acpi_scan_match_handler(char *idstr, |
1844 | const struct acpi_device_id **matchid) | |
1845 | { | |
1846 | struct acpi_scan_handler *handler; | |
1847 | ||
1848 | list_for_each_entry(handler, &acpi_scan_handlers_list, list_node) | |
1849 | if (acpi_scan_handler_matching(handler, idstr, matchid)) | |
1850 | return handler; | |
1851 | ||
1852 | return NULL; | |
1853 | } | |
1854 | ||
3f8055c3 RW |
1855 | void acpi_scan_hotplug_enabled(struct acpi_hotplug_profile *hotplug, bool val) |
1856 | { | |
3f8055c3 RW |
1857 | if (!!hotplug->enabled == !!val) |
1858 | return; | |
1859 | ||
1860 | mutex_lock(&acpi_scan_lock); | |
1861 | ||
1862 | hotplug->enabled = val; | |
3f8055c3 RW |
1863 | |
1864 | mutex_unlock(&acpi_scan_lock); | |
1865 | } | |
1866 | ||
6b772e8f | 1867 | static void acpi_scan_init_hotplug(acpi_handle handle, int type) |
a33ec399 | 1868 | { |
6b772e8f TK |
1869 | struct acpi_device_pnp pnp = {}; |
1870 | struct acpi_hardware_id *hwid; | |
a33ec399 RW |
1871 | struct acpi_scan_handler *handler; |
1872 | ||
6b772e8f TK |
1873 | INIT_LIST_HEAD(&pnp.ids); |
1874 | acpi_set_pnp_ids(handle, &pnp, type); | |
a33ec399 | 1875 | |
6b772e8f | 1876 | if (!pnp.type.hardware_id) |
7a26b530 | 1877 | goto out; |
a33ec399 RW |
1878 | |
1879 | /* | |
1880 | * This relies on the fact that acpi_install_notify_handler() will not | |
1881 | * install the same notify handler routine twice for the same handle. | |
1882 | */ | |
6b772e8f TK |
1883 | list_for_each_entry(hwid, &pnp.ids, list) { |
1884 | handler = acpi_scan_match_handler(hwid->id, NULL); | |
1885 | if (handler) { | |
2cbb14fb TK |
1886 | acpi_install_notify_handler(handle, ACPI_SYSTEM_NOTIFY, |
1887 | acpi_hotplug_notify_cb, handler); | |
6b772e8f TK |
1888 | break; |
1889 | } | |
1890 | } | |
1891 | ||
7a26b530 | 1892 | out: |
6b772e8f | 1893 | acpi_free_pnp_ids(&pnp); |
a33ec399 RW |
1894 | } |
1895 | ||
e3863094 RW |
1896 | static acpi_status acpi_bus_check_add(acpi_handle handle, u32 lvl_not_used, |
1897 | void *not_used, void **return_value) | |
778cbc1d | 1898 | { |
805d410f | 1899 | struct acpi_device *device = NULL; |
778cbc1d BH |
1900 | int type; |
1901 | unsigned long long sta; | |
e3b87f8a | 1902 | acpi_status status; |
778cbc1d BH |
1903 | int result; |
1904 | ||
4002bf38 RW |
1905 | acpi_bus_get_device(handle, &device); |
1906 | if (device) | |
1907 | goto out; | |
1908 | ||
778cbc1d BH |
1909 | result = acpi_bus_type_and_status(handle, &type, &sta); |
1910 | if (result) | |
1911 | return AE_OK; | |
1912 | ||
82c7d5ef RW |
1913 | if (type == ACPI_BUS_TYPE_POWER) { |
1914 | acpi_add_power_resource(handle); | |
1915 | return AE_OK; | |
1916 | } | |
1917 | ||
6b772e8f | 1918 | acpi_scan_init_hotplug(handle, type); |
a33ec399 | 1919 | |
778cbc1d | 1920 | if (!(sta & ACPI_STA_DEVICE_PRESENT) && |
b581a7f9 | 1921 | !(sta & ACPI_STA_DEVICE_FUNCTIONING)) { |
86e4e20e RW |
1922 | struct acpi_device_wakeup wakeup; |
1923 | acpi_handle temp; | |
1924 | ||
1925 | status = acpi_get_handle(handle, "_PRW", &temp); | |
993cbe59 | 1926 | if (ACPI_SUCCESS(status)) { |
86e4e20e RW |
1927 | acpi_bus_extract_wakeup_device_power_package(handle, |
1928 | &wakeup); | |
993cbe59 RW |
1929 | acpi_power_resources_list_free(&wakeup.resources); |
1930 | } | |
778cbc1d | 1931 | return AE_CTRL_DEPTH; |
b581a7f9 | 1932 | } |
778cbc1d | 1933 | |
2c0d4fe0 | 1934 | acpi_add_single_object(&device, handle, type, sta); |
e3b87f8a | 1935 | if (!device) |
51a85faf | 1936 | return AE_CTRL_DEPTH; |
1da177e4 | 1937 | |
4002bf38 | 1938 | out: |
51a85faf BH |
1939 | if (!*return_value) |
1940 | *return_value = device; | |
805d410f | 1941 | |
51a85faf BH |
1942 | return AE_OK; |
1943 | } | |
3fb02738 | 1944 | |
c5698074 | 1945 | static int acpi_scan_attach_handler(struct acpi_device *device) |
ca589f94 | 1946 | { |
c5698074 RW |
1947 | struct acpi_hardware_id *hwid; |
1948 | int ret = 0; | |
ca589f94 | 1949 | |
c5698074 | 1950 | list_for_each_entry(hwid, &device->pnp.ids, list) { |
87b85b3c | 1951 | const struct acpi_device_id *devid; |
c5698074 | 1952 | struct acpi_scan_handler *handler; |
ca589f94 | 1953 | |
c5698074 RW |
1954 | handler = acpi_scan_match_handler(hwid->id, &devid); |
1955 | if (handler) { | |
87b85b3c RW |
1956 | ret = handler->attach(device, devid); |
1957 | if (ret > 0) { | |
1958 | device->handler = handler; | |
c5698074 | 1959 | break; |
87b85b3c | 1960 | } else if (ret < 0) { |
c5698074 | 1961 | break; |
87b85b3c | 1962 | } |
ca589f94 RW |
1963 | } |
1964 | } | |
1965 | return ret; | |
1966 | } | |
1967 | ||
0fc300b0 RW |
1968 | static acpi_status acpi_bus_device_attach(acpi_handle handle, u32 lvl_not_used, |
1969 | void *not_used, void **ret_not_used) | |
51a85faf | 1970 | { |
805d410f RW |
1971 | struct acpi_device *device; |
1972 | unsigned long long sta_not_used; | |
ca589f94 | 1973 | int ret; |
3fb02738 | 1974 | |
805d410f RW |
1975 | /* |
1976 | * Ignore errors ignored by acpi_bus_check_add() to avoid terminating | |
1977 | * namespace walks prematurely. | |
1978 | */ | |
ca589f94 | 1979 | if (acpi_bus_type_and_status(handle, &ret, &sta_not_used)) |
805d410f | 1980 | return AE_OK; |
1da177e4 | 1981 | |
805d410f RW |
1982 | if (acpi_bus_get_device(handle, &device)) |
1983 | return AE_CTRL_DEPTH; | |
7779688f | 1984 | |
ca589f94 RW |
1985 | ret = acpi_scan_attach_handler(device); |
1986 | if (ret) | |
1987 | return ret > 0 ? AE_OK : AE_CTRL_DEPTH; | |
1988 | ||
1989 | ret = device_attach(&device->dev); | |
1990 | return ret >= 0 ? AE_OK : AE_CTRL_DEPTH; | |
1da177e4 | 1991 | } |
1da177e4 | 1992 | |
636458de | 1993 | /** |
b8bd759a | 1994 | * acpi_bus_scan - Add ACPI device node objects in a given namespace scope. |
636458de | 1995 | * @handle: Root of the namespace scope to scan. |
7779688f | 1996 | * |
636458de RW |
1997 | * Scan a given ACPI tree (probably recently hot-plugged) and create and add |
1998 | * found devices. | |
7779688f | 1999 | * |
636458de RW |
2000 | * If no devices were found, -ENODEV is returned, but it does not mean that |
2001 | * there has been a real error. There just have been no suitable ACPI objects | |
2002 | * in the table trunk from which the kernel could create a device and add an | |
2003 | * appropriate driver. | |
3757b948 RW |
2004 | * |
2005 | * Must be called under acpi_scan_lock. | |
7779688f | 2006 | */ |
b8bd759a | 2007 | int acpi_bus_scan(acpi_handle handle) |
3fb02738 | 2008 | { |
b8bd759a | 2009 | void *device = NULL; |
c511cc19 | 2010 | int error = 0; |
3fb02738 | 2011 | |
b8bd759a RW |
2012 | if (ACPI_SUCCESS(acpi_bus_check_add(handle, 0, NULL, &device))) |
2013 | acpi_walk_namespace(ACPI_TYPE_ANY, handle, ACPI_UINT32_MAX, | |
2014 | acpi_bus_check_add, NULL, NULL, &device); | |
3fb02738 | 2015 | |
d2f6650a | 2016 | if (!device) |
c511cc19 RW |
2017 | error = -ENODEV; |
2018 | else if (ACPI_SUCCESS(acpi_bus_device_attach(handle, 0, NULL, NULL))) | |
b8bd759a RW |
2019 | acpi_walk_namespace(ACPI_TYPE_ANY, handle, ACPI_UINT32_MAX, |
2020 | acpi_bus_device_attach, NULL, NULL, NULL); | |
3fb02738 | 2021 | |
c511cc19 | 2022 | return error; |
3fb02738 | 2023 | } |
b8bd759a | 2024 | EXPORT_SYMBOL(acpi_bus_scan); |
a2100801 | 2025 | |
05404d8f RW |
2026 | static acpi_status acpi_bus_device_detach(acpi_handle handle, u32 lvl_not_used, |
2027 | void *not_used, void **ret_not_used) | |
2028 | { | |
2029 | struct acpi_device *device = NULL; | |
a2100801 | 2030 | |
05404d8f | 2031 | if (!acpi_bus_get_device(handle, &device)) { |
ca589f94 RW |
2032 | struct acpi_scan_handler *dev_handler = device->handler; |
2033 | ||
ca589f94 RW |
2034 | if (dev_handler) { |
2035 | if (dev_handler->detach) | |
2036 | dev_handler->detach(device); | |
2037 | ||
2038 | device->handler = NULL; | |
2039 | } else { | |
2040 | device_release_driver(&device->dev); | |
2041 | } | |
05404d8f RW |
2042 | } |
2043 | return AE_OK; | |
3fb02738 | 2044 | } |
1da177e4 | 2045 | |
05404d8f RW |
2046 | static acpi_status acpi_bus_remove(acpi_handle handle, u32 lvl_not_used, |
2047 | void *not_used, void **ret_not_used) | |
1da177e4 | 2048 | { |
05404d8f | 2049 | struct acpi_device *device = NULL; |
4be44fcd | 2050 | |
05404d8f RW |
2051 | if (!acpi_bus_get_device(handle, &device)) |
2052 | acpi_device_unregister(device); | |
1da177e4 | 2053 | |
05404d8f RW |
2054 | return AE_OK; |
2055 | } | |
1da177e4 | 2056 | |
3757b948 RW |
2057 | /** |
2058 | * acpi_bus_trim - Remove ACPI device node and all of its descendants | |
2059 | * @start: Root of the ACPI device nodes subtree to remove. | |
2060 | * | |
2061 | * Must be called under acpi_scan_lock. | |
2062 | */ | |
bfee26db | 2063 | void acpi_bus_trim(struct acpi_device *start) |
1da177e4 | 2064 | { |
05404d8f RW |
2065 | /* |
2066 | * Execute acpi_bus_device_detach() as a post-order callback to detach | |
2067 | * all ACPI drivers from the device nodes being removed. | |
2068 | */ | |
2069 | acpi_walk_namespace(ACPI_TYPE_ANY, start->handle, ACPI_UINT32_MAX, NULL, | |
2070 | acpi_bus_device_detach, NULL, NULL); | |
2071 | acpi_bus_device_detach(start->handle, 0, NULL, NULL); | |
cecdb193 RW |
2072 | /* |
2073 | * Execute acpi_bus_remove() as a post-order callback to remove device | |
2074 | * nodes in the given namespace scope. | |
2075 | */ | |
2076 | acpi_walk_namespace(ACPI_TYPE_ANY, start->handle, ACPI_UINT32_MAX, NULL, | |
2077 | acpi_bus_remove, NULL, NULL); | |
2078 | acpi_bus_remove(start->handle, 0, NULL, NULL); | |
1da177e4 | 2079 | } |
ceaba663 KA |
2080 | EXPORT_SYMBOL_GPL(acpi_bus_trim); |
2081 | ||
e8b945c9 | 2082 | static int acpi_bus_scan_fixed(void) |
1da177e4 | 2083 | { |
4be44fcd | 2084 | int result = 0; |
c4168bff | 2085 | |
1da177e4 LT |
2086 | /* |
2087 | * Enumerate all fixed-feature devices. | |
2088 | */ | |
2c0d4fe0 RW |
2089 | if (!(acpi_gbl_FADT.flags & ACPI_FADT_POWER_BUTTON)) { |
2090 | struct acpi_device *device = NULL; | |
2091 | ||
5c478f49 | 2092 | result = acpi_add_single_object(&device, NULL, |
c4168bff | 2093 | ACPI_BUS_TYPE_POWER_BUTTON, |
2c0d4fe0 RW |
2094 | ACPI_STA_DEFAULT); |
2095 | if (result) | |
2096 | return result; | |
2097 | ||
2098 | result = device_attach(&device->dev); | |
2099 | if (result < 0) | |
2100 | return result; | |
2101 | ||
c10d7a13 | 2102 | device_init_wakeup(&device->dev, true); |
3fb02738 | 2103 | } |
1da177e4 | 2104 | |
2c0d4fe0 RW |
2105 | if (!(acpi_gbl_FADT.flags & ACPI_FADT_SLEEP_BUTTON)) { |
2106 | struct acpi_device *device = NULL; | |
2107 | ||
5c478f49 | 2108 | result = acpi_add_single_object(&device, NULL, |
c4168bff | 2109 | ACPI_BUS_TYPE_SLEEP_BUTTON, |
2c0d4fe0 RW |
2110 | ACPI_STA_DEFAULT); |
2111 | if (result) | |
2112 | return result; | |
2113 | ||
2114 | result = device_attach(&device->dev); | |
3fb02738 | 2115 | } |
1da177e4 | 2116 | |
2c0d4fe0 | 2117 | return result < 0 ? result : 0; |
1da177e4 LT |
2118 | } |
2119 | ||
e747f274 | 2120 | int __init acpi_scan_init(void) |
1da177e4 LT |
2121 | { |
2122 | int result; | |
1da177e4 | 2123 | |
5b327265 PM |
2124 | result = bus_register(&acpi_bus_type); |
2125 | if (result) { | |
2126 | /* We don't want to quit even if we failed to add suspend/resume */ | |
2127 | printk(KERN_ERR PREFIX "Could not register bus type\n"); | |
2128 | } | |
2129 | ||
92ef2a25 | 2130 | acpi_pci_root_init(); |
4daeaf68 | 2131 | acpi_pci_link_init(); |
ac212b69 | 2132 | acpi_processor_init(); |
141a297b | 2133 | acpi_platform_init(); |
f58b082a | 2134 | acpi_lpss_init(); |
2fa97feb | 2135 | acpi_cmos_rtc_init(); |
737f1a9f | 2136 | acpi_container_init(); |
0a347644 | 2137 | acpi_memory_hotplug_init(); |
94add0f8 | 2138 | acpi_dock_init(); |
97d9a9e9 | 2139 | |
3757b948 | 2140 | mutex_lock(&acpi_scan_lock); |
1da177e4 LT |
2141 | /* |
2142 | * Enumerate devices in the ACPI namespace. | |
2143 | */ | |
0cd6ac52 RW |
2144 | result = acpi_bus_scan(ACPI_ROOT_OBJECT); |
2145 | if (result) | |
3757b948 | 2146 | goto out; |
1da177e4 | 2147 | |
0cd6ac52 | 2148 | result = acpi_bus_get_device(ACPI_ROOT_OBJECT, &acpi_root); |
1da177e4 | 2149 | if (result) |
3757b948 | 2150 | goto out; |
1da177e4 | 2151 | |
b8bd759a RW |
2152 | result = acpi_bus_scan_fixed(); |
2153 | if (result) { | |
b17b537a | 2154 | acpi_device_unregister(acpi_root); |
3757b948 | 2155 | goto out; |
b8bd759a | 2156 | } |
1da177e4 | 2157 | |
b8bd759a | 2158 | acpi_update_all_gpes(); |
3757b948 | 2159 | |
668192b6 YL |
2160 | acpi_pci_root_hp_init(); |
2161 | ||
3757b948 RW |
2162 | out: |
2163 | mutex_unlock(&acpi_scan_lock); | |
2164 | return result; | |
1da177e4 | 2165 | } |