]>
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 | |
e49bd2dd | 38 | static LIST_HEAD(acpi_bus_id_list); |
c511cc19 | 39 | static DEFINE_MUTEX(acpi_scan_lock); |
ca589f94 | 40 | static LIST_HEAD(acpi_scan_handlers_list); |
9090589d | 41 | DEFINE_MUTEX(acpi_device_lock); |
1da177e4 LT |
42 | LIST_HEAD(acpi_wakeup_device_list); |
43 | ||
e49bd2dd | 44 | struct acpi_device_bus_id{ |
bb095854 | 45 | char bus_id[15]; |
e49bd2dd ZR |
46 | unsigned int instance_no; |
47 | struct list_head node; | |
1da177e4 | 48 | }; |
29b71a1c | 49 | |
3757b948 RW |
50 | void acpi_scan_lock_acquire(void) |
51 | { | |
52 | mutex_lock(&acpi_scan_lock); | |
53 | } | |
54 | EXPORT_SYMBOL_GPL(acpi_scan_lock_acquire); | |
55 | ||
56 | void acpi_scan_lock_release(void) | |
57 | { | |
58 | mutex_unlock(&acpi_scan_lock); | |
59 | } | |
60 | EXPORT_SYMBOL_GPL(acpi_scan_lock_release); | |
61 | ||
ca589f94 RW |
62 | int acpi_scan_add_handler(struct acpi_scan_handler *handler) |
63 | { | |
64 | if (!handler || !handler->attach) | |
65 | return -EINVAL; | |
66 | ||
67 | list_add_tail(&handler->list_node, &acpi_scan_handlers_list); | |
68 | return 0; | |
69 | } | |
70 | ||
3f8055c3 RW |
71 | int acpi_scan_add_handler_with_hotplug(struct acpi_scan_handler *handler, |
72 | const char *hotplug_profile_name) | |
73 | { | |
74 | int error; | |
75 | ||
76 | error = acpi_scan_add_handler(handler); | |
77 | if (error) | |
78 | return error; | |
79 | ||
80 | acpi_sysfs_add_hotplug_profile(&handler->hotplug, hotplug_profile_name); | |
81 | return 0; | |
82 | } | |
83 | ||
29b71a1c TR |
84 | /* |
85 | * Creates hid/cid(s) string needed for modalias and uevent | |
86 | * e.g. on a device with hid:IBM0001 and cid:ACPI0001 you get: | |
87 | * char *modalias: "acpi:IBM0001:ACPI0001" | |
88 | */ | |
b3e572d2 AB |
89 | static int create_modalias(struct acpi_device *acpi_dev, char *modalias, |
90 | int size) | |
91 | { | |
29b71a1c | 92 | int len; |
5c9fcb5d | 93 | int count; |
7f47fa6c | 94 | struct acpi_hardware_id *id; |
29b71a1c | 95 | |
2b2ae7c7 TR |
96 | if (list_empty(&acpi_dev->pnp.ids)) |
97 | return 0; | |
98 | ||
5c9fcb5d | 99 | len = snprintf(modalias, size, "acpi:"); |
29b71a1c TR |
100 | size -= len; |
101 | ||
7f47fa6c BH |
102 | list_for_each_entry(id, &acpi_dev->pnp.ids, list) { |
103 | count = snprintf(&modalias[len], size, "%s:", id->id); | |
5c9fcb5d ZR |
104 | if (count < 0 || count >= size) |
105 | return -EINVAL; | |
106 | len += count; | |
107 | size -= count; | |
108 | } | |
109 | ||
29b71a1c TR |
110 | modalias[len] = '\0'; |
111 | return len; | |
112 | } | |
113 | ||
114 | static ssize_t | |
115 | acpi_device_modalias_show(struct device *dev, struct device_attribute *attr, char *buf) { | |
116 | struct acpi_device *acpi_dev = to_acpi_device(dev); | |
117 | int len; | |
118 | ||
119 | /* Device has no HID and no CID or string is >1024 */ | |
120 | len = create_modalias(acpi_dev, buf, 1024); | |
121 | if (len <= 0) | |
122 | return 0; | |
123 | buf[len++] = '\n'; | |
124 | return len; | |
125 | } | |
126 | static DEVICE_ATTR(modalias, 0444, acpi_device_modalias_show, NULL); | |
127 | ||
683058e3 RW |
128 | static acpi_status acpi_bus_offline_companions(acpi_handle handle, u32 lvl, |
129 | void *data, void **ret_p) | |
130 | { | |
131 | struct acpi_device *device = NULL; | |
132 | struct acpi_device_physical_node *pn; | |
303bfdb1 | 133 | bool second_pass = (bool)data; |
683058e3 RW |
134 | acpi_status status = AE_OK; |
135 | ||
136 | if (acpi_bus_get_device(handle, &device)) | |
137 | return AE_OK; | |
138 | ||
139 | mutex_lock(&device->physical_node_lock); | |
140 | ||
141 | list_for_each_entry(pn, &device->physical_node_list, node) { | |
142 | int ret; | |
143 | ||
303bfdb1 RW |
144 | if (second_pass) { |
145 | /* Skip devices offlined by the first pass. */ | |
146 | if (pn->put_online) | |
147 | continue; | |
148 | } else { | |
149 | pn->put_online = false; | |
150 | } | |
683058e3 RW |
151 | ret = device_offline(pn->dev); |
152 | if (acpi_force_hot_remove) | |
153 | continue; | |
154 | ||
303bfdb1 RW |
155 | if (ret >= 0) { |
156 | pn->put_online = !ret; | |
157 | } else { | |
158 | *ret_p = pn->dev; | |
159 | if (second_pass) { | |
160 | status = AE_ERROR; | |
161 | break; | |
162 | } | |
683058e3 | 163 | } |
683058e3 RW |
164 | } |
165 | ||
166 | mutex_unlock(&device->physical_node_lock); | |
167 | ||
168 | return status; | |
169 | } | |
170 | ||
171 | static acpi_status acpi_bus_online_companions(acpi_handle handle, u32 lvl, | |
172 | void *data, void **ret_p) | |
173 | { | |
174 | struct acpi_device *device = NULL; | |
175 | struct acpi_device_physical_node *pn; | |
176 | ||
177 | if (acpi_bus_get_device(handle, &device)) | |
178 | return AE_OK; | |
179 | ||
180 | mutex_lock(&device->physical_node_lock); | |
181 | ||
182 | list_for_each_entry(pn, &device->physical_node_list, node) | |
183 | if (pn->put_online) { | |
184 | device_online(pn->dev); | |
185 | pn->put_online = false; | |
186 | } | |
187 | ||
188 | mutex_unlock(&device->physical_node_lock); | |
189 | ||
190 | return AE_OK; | |
191 | } | |
192 | ||
a33ec399 | 193 | static int acpi_scan_hot_remove(struct acpi_device *device) |
1da177e4 | 194 | { |
5993c467 | 195 | acpi_handle handle = device->handle; |
303bfdb1 | 196 | struct device *errdev; |
a33ec399 | 197 | acpi_status status; |
882fd12e | 198 | unsigned long long sta; |
f058cdf4 | 199 | |
3757b948 | 200 | /* If there is no handle, the device node has been unregistered. */ |
a33ec399 | 201 | if (!handle) { |
3757b948 RW |
202 | dev_dbg(&device->dev, "ACPI handle missing\n"); |
203 | put_device(&device->dev); | |
a33ec399 | 204 | return -EINVAL; |
3757b948 RW |
205 | } |
206 | ||
683058e3 RW |
207 | lock_device_hotplug(); |
208 | ||
303bfdb1 RW |
209 | /* |
210 | * Carry out two passes here and ignore errors in the first pass, | |
211 | * because if the devices in question are memory blocks and | |
212 | * CONFIG_MEMCG is set, one of the blocks may hold data structures | |
213 | * that the other blocks depend on, but it is not known in advance which | |
214 | * block holds them. | |
215 | * | |
216 | * If the first pass is successful, the second one isn't needed, though. | |
217 | */ | |
218 | errdev = NULL; | |
219 | acpi_walk_namespace(ACPI_TYPE_ANY, handle, ACPI_UINT32_MAX, | |
220 | NULL, acpi_bus_offline_companions, | |
221 | (void *)false, (void **)&errdev); | |
222 | acpi_bus_offline_companions(handle, 0, (void *)false, (void **)&errdev); | |
223 | if (errdev) { | |
224 | errdev = NULL; | |
683058e3 | 225 | acpi_walk_namespace(ACPI_TYPE_ANY, handle, ACPI_UINT32_MAX, |
303bfdb1 RW |
226 | NULL, acpi_bus_offline_companions, |
227 | (void *)true , (void **)&errdev); | |
228 | if (!errdev || acpi_force_hot_remove) | |
229 | acpi_bus_offline_companions(handle, 0, (void *)true, | |
230 | (void **)&errdev); | |
231 | ||
232 | if (errdev && !acpi_force_hot_remove) { | |
233 | dev_warn(errdev, "Offline failed.\n"); | |
234 | acpi_bus_online_companions(handle, 0, NULL, NULL); | |
235 | acpi_walk_namespace(ACPI_TYPE_ANY, handle, | |
236 | ACPI_UINT32_MAX, | |
237 | acpi_bus_online_companions, NULL, | |
238 | NULL, NULL); | |
239 | ||
240 | unlock_device_hotplug(); | |
241 | ||
242 | put_device(&device->dev); | |
243 | return -EBUSY; | |
244 | } | |
683058e3 RW |
245 | } |
246 | ||
26d46867 | 247 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
0794469d | 248 | "Hot-removing device %s...\n", dev_name(&device->dev))); |
26d46867 | 249 | |
bfee26db | 250 | acpi_bus_trim(device); |
683058e3 RW |
251 | |
252 | unlock_device_hotplug(); | |
253 | ||
3757b948 RW |
254 | /* Device node has been unregistered. */ |
255 | put_device(&device->dev); | |
b3c450c3 TK |
256 | device = NULL; |
257 | ||
7d2421f8 | 258 | acpi_evaluate_lck(handle, 0); |
1da177e4 LT |
259 | /* |
260 | * TBD: _EJD support. | |
261 | */ | |
7d2421f8 JL |
262 | status = acpi_evaluate_ej0(handle); |
263 | if (status == AE_NOT_FOUND) | |
264 | return -ENODEV; | |
265 | else if (ACPI_FAILURE(status)) | |
266 | return -EIO; | |
1da177e4 | 267 | |
882fd12e TK |
268 | /* |
269 | * Verify if eject was indeed successful. If not, log an error | |
270 | * message. No need to call _OST since _EJ0 call was made OK. | |
271 | */ | |
272 | status = acpi_evaluate_integer(handle, "_STA", NULL, &sta); | |
273 | if (ACPI_FAILURE(status)) { | |
274 | acpi_handle_warn(handle, | |
275 | "Status check after eject failed (0x%x)\n", status); | |
276 | } else if (sta & ACPI_STA_DEVICE_ENABLED) { | |
277 | acpi_handle_warn(handle, | |
278 | "Eject incomplete - status 0x%llx\n", sta); | |
279 | } | |
280 | ||
a33ec399 RW |
281 | return 0; |
282 | } | |
1da177e4 | 283 | |
a33ec399 RW |
284 | static void acpi_bus_device_eject(void *context) |
285 | { | |
286 | acpi_handle handle = context; | |
287 | struct acpi_device *device = NULL; | |
288 | struct acpi_scan_handler *handler; | |
289 | u32 ost_code = ACPI_OST_SC_NON_SPECIFIC_FAILURE; | |
290 | ||
291 | mutex_lock(&acpi_scan_lock); | |
292 | ||
293 | acpi_bus_get_device(handle, &device); | |
294 | if (!device) | |
295 | goto err_out; | |
296 | ||
297 | handler = device->handler; | |
298 | if (!handler || !handler->hotplug.enabled) { | |
299 | ost_code = ACPI_OST_SC_EJECT_NOT_SUPPORTED; | |
300 | goto err_out; | |
301 | } | |
302 | acpi_evaluate_hotplug_ost(handle, ACPI_NOTIFY_EJECT_REQUEST, | |
303 | ACPI_OST_SC_EJECT_IN_PROGRESS, NULL); | |
304 | if (handler->hotplug.mode == AHM_CONTAINER) { | |
305 | device->flags.eject_pending = true; | |
306 | kobject_uevent(&device->dev.kobj, KOBJ_OFFLINE); | |
307 | } else { | |
308 | int error; | |
309 | ||
310 | get_device(&device->dev); | |
311 | error = acpi_scan_hot_remove(device); | |
312 | if (error) | |
313 | goto err_out; | |
f058cdf4 | 314 | } |
1da177e4 | 315 | |
3757b948 | 316 | out: |
f058cdf4 | 317 | mutex_unlock(&acpi_scan_lock); |
c8d72a5e | 318 | return; |
a33ec399 RW |
319 | |
320 | err_out: | |
321 | acpi_evaluate_hotplug_ost(handle, ACPI_NOTIFY_EJECT_REQUEST, ost_code, | |
322 | NULL); | |
323 | goto out; | |
324 | } | |
325 | ||
326 | static void acpi_scan_bus_device_check(acpi_handle handle, u32 ost_source) | |
327 | { | |
328 | struct acpi_device *device = NULL; | |
329 | u32 ost_code = ACPI_OST_SC_NON_SPECIFIC_FAILURE; | |
330 | int error; | |
331 | ||
332 | mutex_lock(&acpi_scan_lock); | |
683058e3 | 333 | lock_device_hotplug(); |
a33ec399 RW |
334 | |
335 | acpi_bus_get_device(handle, &device); | |
336 | if (device) { | |
337 | dev_warn(&device->dev, "Attempt to re-insert\n"); | |
338 | goto out; | |
339 | } | |
340 | acpi_evaluate_hotplug_ost(handle, ost_source, | |
341 | ACPI_OST_SC_INSERT_IN_PROGRESS, NULL); | |
342 | error = acpi_bus_scan(handle); | |
343 | if (error) { | |
344 | acpi_handle_warn(handle, "Namespace scan failure\n"); | |
345 | goto out; | |
346 | } | |
347 | error = acpi_bus_get_device(handle, &device); | |
348 | if (error) { | |
349 | acpi_handle_warn(handle, "Missing device node object\n"); | |
350 | goto out; | |
351 | } | |
352 | ost_code = ACPI_OST_SC_SUCCESS; | |
353 | if (device->handler && device->handler->hotplug.mode == AHM_CONTAINER) | |
354 | kobject_uevent(&device->dev.kobj, KOBJ_ONLINE); | |
355 | ||
356 | out: | |
683058e3 | 357 | unlock_device_hotplug(); |
a33ec399 RW |
358 | acpi_evaluate_hotplug_ost(handle, ost_source, ost_code, NULL); |
359 | mutex_unlock(&acpi_scan_lock); | |
360 | } | |
361 | ||
362 | static void acpi_scan_bus_check(void *context) | |
363 | { | |
364 | acpi_scan_bus_device_check((acpi_handle)context, | |
365 | ACPI_NOTIFY_BUS_CHECK); | |
366 | } | |
367 | ||
368 | static void acpi_scan_device_check(void *context) | |
369 | { | |
370 | acpi_scan_bus_device_check((acpi_handle)context, | |
371 | ACPI_NOTIFY_DEVICE_CHECK); | |
372 | } | |
373 | ||
2cbb14fb TK |
374 | static void acpi_hotplug_unsupported(acpi_handle handle, u32 type) |
375 | { | |
376 | u32 ost_status; | |
377 | ||
378 | switch (type) { | |
379 | case ACPI_NOTIFY_BUS_CHECK: | |
380 | acpi_handle_debug(handle, | |
381 | "ACPI_NOTIFY_BUS_CHECK event: unsupported\n"); | |
382 | ost_status = ACPI_OST_SC_INSERT_NOT_SUPPORTED; | |
383 | break; | |
384 | case ACPI_NOTIFY_DEVICE_CHECK: | |
385 | acpi_handle_debug(handle, | |
386 | "ACPI_NOTIFY_DEVICE_CHECK event: unsupported\n"); | |
387 | ost_status = ACPI_OST_SC_INSERT_NOT_SUPPORTED; | |
388 | break; | |
389 | case ACPI_NOTIFY_EJECT_REQUEST: | |
390 | acpi_handle_debug(handle, | |
391 | "ACPI_NOTIFY_EJECT_REQUEST event: unsupported\n"); | |
392 | ost_status = ACPI_OST_SC_EJECT_NOT_SUPPORTED; | |
393 | break; | |
394 | default: | |
395 | /* non-hotplug event; possibly handled by other handler */ | |
396 | return; | |
397 | } | |
398 | ||
399 | acpi_evaluate_hotplug_ost(handle, type, ost_status, NULL); | |
400 | } | |
401 | ||
402 | static void acpi_hotplug_notify_cb(acpi_handle handle, u32 type, void *data) | |
a33ec399 RW |
403 | { |
404 | acpi_osd_exec_callback callback; | |
2cbb14fb | 405 | struct acpi_scan_handler *handler = data; |
a33ec399 RW |
406 | acpi_status status; |
407 | ||
2cbb14fb TK |
408 | if (!handler->hotplug.enabled) |
409 | return acpi_hotplug_unsupported(handle, type); | |
410 | ||
a33ec399 RW |
411 | switch (type) { |
412 | case ACPI_NOTIFY_BUS_CHECK: | |
413 | acpi_handle_debug(handle, "ACPI_NOTIFY_BUS_CHECK event\n"); | |
414 | callback = acpi_scan_bus_check; | |
415 | break; | |
416 | case ACPI_NOTIFY_DEVICE_CHECK: | |
417 | acpi_handle_debug(handle, "ACPI_NOTIFY_DEVICE_CHECK event\n"); | |
418 | callback = acpi_scan_device_check; | |
419 | break; | |
420 | case ACPI_NOTIFY_EJECT_REQUEST: | |
421 | acpi_handle_debug(handle, "ACPI_NOTIFY_EJECT_REQUEST event\n"); | |
422 | callback = acpi_bus_device_eject; | |
423 | break; | |
424 | default: | |
425 | /* non-hotplug event; possibly handled by other handler */ | |
426 | return; | |
427 | } | |
428 | status = acpi_os_hotplug_execute(callback, handle); | |
429 | if (ACPI_FAILURE(status)) | |
430 | acpi_evaluate_hotplug_ost(handle, type, | |
431 | ACPI_OST_SC_NON_SPECIFIC_FAILURE, | |
432 | NULL); | |
433 | } | |
434 | ||
435 | /** | |
436 | * acpi_bus_hot_remove_device: hot-remove a device and its children | |
437 | * @context: struct acpi_eject_event pointer (freed in this func) | |
438 | * | |
439 | * Hot-remove a device and its children. This function frees up the | |
440 | * memory space passed by arg context, so that the caller may call | |
441 | * this function asynchronously through acpi_os_hotplug_execute(). | |
442 | */ | |
443 | void acpi_bus_hot_remove_device(void *context) | |
444 | { | |
445 | struct acpi_eject_event *ej_event = context; | |
446 | struct acpi_device *device = ej_event->device; | |
447 | acpi_handle handle = device->handle; | |
448 | int error; | |
449 | ||
450 | mutex_lock(&acpi_scan_lock); | |
451 | ||
452 | error = acpi_scan_hot_remove(device); | |
453 | if (error && handle) | |
454 | acpi_evaluate_hotplug_ost(handle, ej_event->event, | |
455 | ACPI_OST_SC_NON_SPECIFIC_FAILURE, | |
456 | NULL); | |
457 | ||
458 | mutex_unlock(&acpi_scan_lock); | |
459 | kfree(context); | |
1da177e4 | 460 | } |
61622acc | 461 | EXPORT_SYMBOL(acpi_bus_hot_remove_device); |
1da177e4 | 462 | |
836aedb1 RW |
463 | static ssize_t real_power_state_show(struct device *dev, |
464 | struct device_attribute *attr, char *buf) | |
465 | { | |
466 | struct acpi_device *adev = to_acpi_device(dev); | |
467 | int state; | |
468 | int ret; | |
469 | ||
470 | ret = acpi_device_get_power(adev, &state); | |
471 | if (ret) | |
472 | return ret; | |
473 | ||
474 | return sprintf(buf, "%s\n", acpi_power_state_string(state)); | |
475 | } | |
476 | ||
477 | static DEVICE_ATTR(real_power_state, 0444, real_power_state_show, NULL); | |
478 | ||
479 | static ssize_t power_state_show(struct device *dev, | |
480 | struct device_attribute *attr, char *buf) | |
481 | { | |
482 | struct acpi_device *adev = to_acpi_device(dev); | |
483 | ||
484 | return sprintf(buf, "%s\n", acpi_power_state_string(adev->power.state)); | |
485 | } | |
486 | ||
487 | static DEVICE_ATTR(power_state, 0444, power_state_show, NULL); | |
488 | ||
1da177e4 | 489 | static ssize_t |
f883d9db PM |
490 | acpi_eject_store(struct device *d, struct device_attribute *attr, |
491 | const char *buf, size_t count) | |
1da177e4 | 492 | { |
f883d9db | 493 | struct acpi_device *acpi_device = to_acpi_device(d); |
c4753e57 | 494 | struct acpi_eject_event *ej_event; |
a33ec399 RW |
495 | acpi_object_type not_used; |
496 | acpi_status status; | |
497 | u32 ost_source; | |
498 | int ret; | |
1da177e4 | 499 | |
a33ec399 | 500 | if (!count || buf[0] != '1') |
1da177e4 | 501 | return -EINVAL; |
1da177e4 | 502 | |
a33ec399 RW |
503 | if ((!acpi_device->handler || !acpi_device->handler->hotplug.enabled) |
504 | && !acpi_device->driver) | |
505 | return -ENODEV; | |
506 | ||
507 | status = acpi_get_type(acpi_device->handle, ¬_used); | |
508 | if (ACPI_FAILURE(status) || !acpi_device->flags.ejectable) | |
509 | return -ENODEV; | |
510 | ||
511 | mutex_lock(&acpi_scan_lock); | |
c4753e57 | 512 | |
c4753e57 | 513 | if (acpi_device->flags.eject_pending) { |
a33ec399 RW |
514 | /* ACPI eject notification event. */ |
515 | ost_source = ACPI_NOTIFY_EJECT_REQUEST; | |
c4753e57 TK |
516 | acpi_device->flags.eject_pending = 0; |
517 | } else { | |
a33ec399 RW |
518 | /* Eject initiated by user space. */ |
519 | ost_source = ACPI_OST_EC_OSPM_EJECT; | |
c4753e57 | 520 | } |
a33ec399 RW |
521 | ej_event = kmalloc(sizeof(*ej_event), GFP_KERNEL); |
522 | if (!ej_event) { | |
523 | ret = -ENOMEM; | |
524 | goto err_out; | |
525 | } | |
526 | acpi_evaluate_hotplug_ost(acpi_device->handle, ost_source, | |
527 | ACPI_OST_SC_EJECT_IN_PROGRESS, NULL); | |
528 | ej_event->device = acpi_device; | |
529 | ej_event->event = ost_source; | |
530 | get_device(&acpi_device->dev); | |
3757b948 RW |
531 | status = acpi_os_hotplug_execute(acpi_bus_hot_remove_device, ej_event); |
532 | if (ACPI_FAILURE(status)) { | |
533 | put_device(&acpi_device->dev); | |
534 | kfree(ej_event); | |
a33ec399 RW |
535 | ret = status == AE_NO_MEMORY ? -ENOMEM : -EAGAIN; |
536 | goto err_out; | |
3757b948 | 537 | } |
a33ec399 RW |
538 | ret = count; |
539 | ||
540 | out: | |
541 | mutex_unlock(&acpi_scan_lock); | |
1da177e4 | 542 | return ret; |
a33ec399 RW |
543 | |
544 | err_out: | |
545 | acpi_evaluate_hotplug_ost(acpi_device->handle, ost_source, | |
546 | ACPI_OST_SC_NON_SPECIFIC_FAILURE, NULL); | |
547 | goto out; | |
1da177e4 LT |
548 | } |
549 | ||
f883d9db | 550 | static DEVICE_ATTR(eject, 0200, NULL, acpi_eject_store); |
1da177e4 | 551 | |
e49bd2dd ZR |
552 | static ssize_t |
553 | acpi_device_hid_show(struct device *dev, struct device_attribute *attr, char *buf) { | |
554 | struct acpi_device *acpi_dev = to_acpi_device(dev); | |
1da177e4 | 555 | |
ea8d82fd | 556 | return sprintf(buf, "%s\n", acpi_device_hid(acpi_dev)); |
1da177e4 | 557 | } |
e49bd2dd | 558 | static DEVICE_ATTR(hid, 0444, acpi_device_hid_show, NULL); |
1da177e4 | 559 | |
923d4a45 LZ |
560 | static ssize_t acpi_device_uid_show(struct device *dev, |
561 | struct device_attribute *attr, char *buf) | |
562 | { | |
563 | struct acpi_device *acpi_dev = to_acpi_device(dev); | |
564 | ||
565 | return sprintf(buf, "%s\n", acpi_dev->pnp.unique_id); | |
566 | } | |
567 | static DEVICE_ATTR(uid, 0444, acpi_device_uid_show, NULL); | |
568 | ||
569 | static ssize_t acpi_device_adr_show(struct device *dev, | |
570 | struct device_attribute *attr, char *buf) | |
571 | { | |
572 | struct acpi_device *acpi_dev = to_acpi_device(dev); | |
573 | ||
574 | return sprintf(buf, "0x%08x\n", | |
575 | (unsigned int)(acpi_dev->pnp.bus_address)); | |
576 | } | |
577 | static DEVICE_ATTR(adr, 0444, acpi_device_adr_show, NULL); | |
578 | ||
e49bd2dd ZR |
579 | static ssize_t |
580 | acpi_device_path_show(struct device *dev, struct device_attribute *attr, char *buf) { | |
581 | struct acpi_device *acpi_dev = to_acpi_device(dev); | |
582 | struct acpi_buffer path = {ACPI_ALLOCATE_BUFFER, NULL}; | |
583 | int result; | |
1da177e4 | 584 | |
e49bd2dd | 585 | result = acpi_get_name(acpi_dev->handle, ACPI_FULL_PATHNAME, &path); |
0c526d96 | 586 | if (result) |
e49bd2dd | 587 | goto end; |
1da177e4 | 588 | |
e49bd2dd ZR |
589 | result = sprintf(buf, "%s\n", (char*)path.pointer); |
590 | kfree(path.pointer); | |
0c526d96 | 591 | end: |
e49bd2dd | 592 | return result; |
1da177e4 | 593 | } |
e49bd2dd | 594 | static DEVICE_ATTR(path, 0444, acpi_device_path_show, NULL); |
1da177e4 | 595 | |
d1efe3c3 LO |
596 | /* sysfs file that shows description text from the ACPI _STR method */ |
597 | static ssize_t description_show(struct device *dev, | |
598 | struct device_attribute *attr, | |
599 | char *buf) { | |
600 | struct acpi_device *acpi_dev = to_acpi_device(dev); | |
601 | int result; | |
602 | ||
603 | if (acpi_dev->pnp.str_obj == NULL) | |
604 | return 0; | |
605 | ||
606 | /* | |
607 | * The _STR object contains a Unicode identifier for a device. | |
608 | * We need to convert to utf-8 so it can be displayed. | |
609 | */ | |
610 | result = utf16s_to_utf8s( | |
611 | (wchar_t *)acpi_dev->pnp.str_obj->buffer.pointer, | |
612 | acpi_dev->pnp.str_obj->buffer.length, | |
613 | UTF16_LITTLE_ENDIAN, buf, | |
614 | PAGE_SIZE); | |
615 | ||
616 | buf[result++] = '\n'; | |
617 | ||
618 | return result; | |
619 | } | |
620 | static DEVICE_ATTR(description, 0444, description_show, NULL); | |
621 | ||
bb74ac23 YI |
622 | static ssize_t |
623 | acpi_device_sun_show(struct device *dev, struct device_attribute *attr, | |
624 | char *buf) { | |
625 | struct acpi_device *acpi_dev = to_acpi_device(dev); | |
626 | ||
627 | return sprintf(buf, "%lu\n", acpi_dev->pnp.sun); | |
628 | } | |
629 | static DEVICE_ATTR(sun, 0444, acpi_device_sun_show, NULL); | |
630 | ||
e49bd2dd | 631 | static int acpi_device_setup_files(struct acpi_device *dev) |
1da177e4 | 632 | { |
d1efe3c3 | 633 | struct acpi_buffer buffer = {ACPI_ALLOCATE_BUFFER, NULL}; |
f883d9db | 634 | acpi_status status; |
bb74ac23 | 635 | unsigned long long sun; |
e49bd2dd | 636 | int result = 0; |
1da177e4 LT |
637 | |
638 | /* | |
e49bd2dd | 639 | * Devices gotten from FADT don't have a "path" attribute |
1da177e4 | 640 | */ |
0c526d96 | 641 | if (dev->handle) { |
e49bd2dd | 642 | result = device_create_file(&dev->dev, &dev_attr_path); |
0c526d96 | 643 | if (result) |
e49bd2dd | 644 | goto end; |
1da177e4 LT |
645 | } |
646 | ||
2b2ae7c7 TR |
647 | if (!list_empty(&dev->pnp.ids)) { |
648 | result = device_create_file(&dev->dev, &dev_attr_hid); | |
649 | if (result) | |
650 | goto end; | |
1da177e4 | 651 | |
2b2ae7c7 TR |
652 | result = device_create_file(&dev->dev, &dev_attr_modalias); |
653 | if (result) | |
654 | goto end; | |
655 | } | |
29b71a1c | 656 | |
d1efe3c3 LO |
657 | /* |
658 | * If device has _STR, 'description' file is created | |
659 | */ | |
952c63e9 | 660 | if (acpi_has_method(dev->handle, "_STR")) { |
d1efe3c3 LO |
661 | status = acpi_evaluate_object(dev->handle, "_STR", |
662 | NULL, &buffer); | |
663 | if (ACPI_FAILURE(status)) | |
664 | buffer.pointer = NULL; | |
665 | dev->pnp.str_obj = buffer.pointer; | |
666 | result = device_create_file(&dev->dev, &dev_attr_description); | |
667 | if (result) | |
668 | goto end; | |
669 | } | |
670 | ||
d4e1a692 | 671 | if (dev->pnp.type.bus_address) |
923d4a45 LZ |
672 | result = device_create_file(&dev->dev, &dev_attr_adr); |
673 | if (dev->pnp.unique_id) | |
674 | result = device_create_file(&dev->dev, &dev_attr_uid); | |
675 | ||
bb74ac23 YI |
676 | status = acpi_evaluate_integer(dev->handle, "_SUN", NULL, &sun); |
677 | if (ACPI_SUCCESS(status)) { | |
678 | dev->pnp.sun = (unsigned long)sun; | |
679 | result = device_create_file(&dev->dev, &dev_attr_sun); | |
680 | if (result) | |
681 | goto end; | |
682 | } else { | |
683 | dev->pnp.sun = (unsigned long)-1; | |
684 | } | |
685 | ||
e49bd2dd ZR |
686 | /* |
687 | * If device has _EJ0, 'eject' file is created that is used to trigger | |
688 | * hot-removal function from userland. | |
689 | */ | |
952c63e9 | 690 | if (acpi_has_method(dev->handle, "_EJ0")) { |
e49bd2dd | 691 | result = device_create_file(&dev->dev, &dev_attr_eject); |
836aedb1 RW |
692 | if (result) |
693 | return result; | |
694 | } | |
695 | ||
696 | if (dev->flags.power_manageable) { | |
697 | result = device_create_file(&dev->dev, &dev_attr_power_state); | |
698 | if (result) | |
699 | return result; | |
700 | ||
701 | if (dev->power.flags.power_resources) | |
702 | result = device_create_file(&dev->dev, | |
703 | &dev_attr_real_power_state); | |
704 | } | |
705 | ||
0c526d96 | 706 | end: |
e49bd2dd | 707 | return result; |
1da177e4 LT |
708 | } |
709 | ||
f883d9db | 710 | static void acpi_device_remove_files(struct acpi_device *dev) |
1da177e4 | 711 | { |
836aedb1 RW |
712 | if (dev->flags.power_manageable) { |
713 | device_remove_file(&dev->dev, &dev_attr_power_state); | |
714 | if (dev->power.flags.power_resources) | |
715 | device_remove_file(&dev->dev, | |
716 | &dev_attr_real_power_state); | |
717 | } | |
718 | ||
f883d9db | 719 | /* |
d1efe3c3 LO |
720 | * If device has _STR, remove 'description' file |
721 | */ | |
952c63e9 | 722 | if (acpi_has_method(dev->handle, "_STR")) { |
d1efe3c3 LO |
723 | kfree(dev->pnp.str_obj); |
724 | device_remove_file(&dev->dev, &dev_attr_description); | |
725 | } | |
726 | /* | |
727 | * If device has _EJ0, remove 'eject' file. | |
f883d9db | 728 | */ |
952c63e9 | 729 | if (acpi_has_method(dev->handle, "_EJ0")) |
f883d9db | 730 | device_remove_file(&dev->dev, &dev_attr_eject); |
1da177e4 | 731 | |
952c63e9 | 732 | if (acpi_has_method(dev->handle, "_SUN")) |
bb74ac23 YI |
733 | device_remove_file(&dev->dev, &dev_attr_sun); |
734 | ||
923d4a45 LZ |
735 | if (dev->pnp.unique_id) |
736 | device_remove_file(&dev->dev, &dev_attr_uid); | |
d4e1a692 | 737 | if (dev->pnp.type.bus_address) |
923d4a45 | 738 | device_remove_file(&dev->dev, &dev_attr_adr); |
1131b938 BH |
739 | device_remove_file(&dev->dev, &dev_attr_modalias); |
740 | device_remove_file(&dev->dev, &dev_attr_hid); | |
0c526d96 | 741 | if (dev->handle) |
e49bd2dd | 742 | device_remove_file(&dev->dev, &dev_attr_path); |
1da177e4 | 743 | } |
1da177e4 | 744 | /* -------------------------------------------------------------------------- |
9e89dde2 | 745 | ACPI Bus operations |
1da177e4 | 746 | -------------------------------------------------------------------------- */ |
29b71a1c | 747 | |
cf761af9 MW |
748 | static const struct acpi_device_id *__acpi_match_device( |
749 | struct acpi_device *device, const struct acpi_device_id *ids) | |
29b71a1c TR |
750 | { |
751 | const struct acpi_device_id *id; | |
7f47fa6c | 752 | struct acpi_hardware_id *hwid; |
29b71a1c | 753 | |
39a0ad87 ZY |
754 | /* |
755 | * If the device is not present, it is unnecessary to load device | |
756 | * driver for it. | |
757 | */ | |
758 | if (!device->status.present) | |
cf761af9 | 759 | return NULL; |
39a0ad87 | 760 | |
7f47fa6c BH |
761 | for (id = ids; id->id[0]; id++) |
762 | list_for_each_entry(hwid, &device->pnp.ids, list) | |
763 | if (!strcmp((char *) id->id, hwid->id)) | |
cf761af9 MW |
764 | return id; |
765 | ||
766 | return NULL; | |
767 | } | |
768 | ||
769 | /** | |
770 | * acpi_match_device - Match a struct device against a given list of ACPI IDs | |
771 | * @ids: Array of struct acpi_device_id object to match against. | |
772 | * @dev: The device structure to match. | |
773 | * | |
774 | * Check if @dev has a valid ACPI handle and if there is a struct acpi_device | |
775 | * object for that handle and use that object to match against a given list of | |
776 | * device IDs. | |
777 | * | |
778 | * Return a pointer to the first matching ID on success or %NULL on failure. | |
779 | */ | |
780 | const struct acpi_device_id *acpi_match_device(const struct acpi_device_id *ids, | |
781 | const struct device *dev) | |
782 | { | |
783 | struct acpi_device *adev; | |
0613e1f7 | 784 | acpi_handle handle = ACPI_HANDLE(dev); |
cf761af9 | 785 | |
0613e1f7 | 786 | if (!ids || !handle || acpi_bus_get_device(handle, &adev)) |
cf761af9 MW |
787 | return NULL; |
788 | ||
789 | return __acpi_match_device(adev, ids); | |
790 | } | |
791 | EXPORT_SYMBOL_GPL(acpi_match_device); | |
29b71a1c | 792 | |
cf761af9 MW |
793 | int acpi_match_device_ids(struct acpi_device *device, |
794 | const struct acpi_device_id *ids) | |
795 | { | |
796 | return __acpi_match_device(device, ids) ? 0 : -ENOENT; | |
29b71a1c TR |
797 | } |
798 | EXPORT_SYMBOL(acpi_match_device_ids); | |
799 | ||
0b224527 RW |
800 | static void acpi_free_power_resources_lists(struct acpi_device *device) |
801 | { | |
802 | int i; | |
803 | ||
993cbe59 RW |
804 | if (device->wakeup.flags.valid) |
805 | acpi_power_resources_list_free(&device->wakeup.resources); | |
806 | ||
0b224527 RW |
807 | if (!device->flags.power_manageable) |
808 | return; | |
809 | ||
810 | for (i = ACPI_STATE_D0; i <= ACPI_STATE_D3_HOT; i++) { | |
811 | struct acpi_device_power_state *ps = &device->power.states[i]; | |
812 | acpi_power_resources_list_free(&ps->resources); | |
813 | } | |
7f47fa6c BH |
814 | } |
815 | ||
1890a97a | 816 | static void acpi_device_release(struct device *dev) |
1da177e4 | 817 | { |
1890a97a | 818 | struct acpi_device *acpi_dev = to_acpi_device(dev); |
1da177e4 | 819 | |
c0af4175 | 820 | acpi_free_pnp_ids(&acpi_dev->pnp); |
0b224527 | 821 | acpi_free_power_resources_lists(acpi_dev); |
1890a97a | 822 | kfree(acpi_dev); |
1da177e4 LT |
823 | } |
824 | ||
5d9464a4 | 825 | static int acpi_bus_match(struct device *dev, struct device_driver *drv) |
9e89dde2 | 826 | { |
5d9464a4 PM |
827 | struct acpi_device *acpi_dev = to_acpi_device(dev); |
828 | struct acpi_driver *acpi_drv = to_acpi_driver(drv); | |
1da177e4 | 829 | |
209d3b17 | 830 | return acpi_dev->flags.match_driver |
805d410f | 831 | && !acpi_match_device_ids(acpi_dev, acpi_drv->ids); |
5d9464a4 | 832 | } |
1da177e4 | 833 | |
7eff2e7a | 834 | static int acpi_device_uevent(struct device *dev, struct kobj_uevent_env *env) |
1da177e4 | 835 | { |
5d9464a4 | 836 | struct acpi_device *acpi_dev = to_acpi_device(dev); |
7eff2e7a | 837 | int len; |
5d9464a4 | 838 | |
2b2ae7c7 TR |
839 | if (list_empty(&acpi_dev->pnp.ids)) |
840 | return 0; | |
841 | ||
7eff2e7a KS |
842 | if (add_uevent_var(env, "MODALIAS=")) |
843 | return -ENOMEM; | |
844 | len = create_modalias(acpi_dev, &env->buf[env->buflen - 1], | |
845 | sizeof(env->buf) - env->buflen); | |
846 | if (len >= (sizeof(env->buf) - env->buflen)) | |
847 | return -ENOMEM; | |
848 | env->buflen += len; | |
9e89dde2 | 849 | return 0; |
1da177e4 LT |
850 | } |
851 | ||
46ec8598 BH |
852 | static void acpi_device_notify(acpi_handle handle, u32 event, void *data) |
853 | { | |
854 | struct acpi_device *device = data; | |
855 | ||
856 | device->driver->ops.notify(device, event); | |
857 | } | |
858 | ||
859 | static acpi_status acpi_device_notify_fixed(void *data) | |
860 | { | |
861 | struct acpi_device *device = data; | |
862 | ||
53de5356 BH |
863 | /* Fixed hardware devices have no handles */ |
864 | acpi_device_notify(NULL, ACPI_FIXED_HARDWARE_EVENT, device); | |
46ec8598 BH |
865 | return AE_OK; |
866 | } | |
867 | ||
868 | static int acpi_device_install_notify_handler(struct acpi_device *device) | |
869 | { | |
870 | acpi_status status; | |
46ec8598 | 871 | |
ccba2a36 | 872 | if (device->device_type == ACPI_BUS_TYPE_POWER_BUTTON) |
46ec8598 BH |
873 | status = |
874 | acpi_install_fixed_event_handler(ACPI_EVENT_POWER_BUTTON, | |
875 | acpi_device_notify_fixed, | |
876 | device); | |
ccba2a36 | 877 | else if (device->device_type == ACPI_BUS_TYPE_SLEEP_BUTTON) |
46ec8598 BH |
878 | status = |
879 | acpi_install_fixed_event_handler(ACPI_EVENT_SLEEP_BUTTON, | |
880 | acpi_device_notify_fixed, | |
881 | device); | |
882 | else | |
883 | status = acpi_install_notify_handler(device->handle, | |
884 | ACPI_DEVICE_NOTIFY, | |
885 | acpi_device_notify, | |
886 | device); | |
887 | ||
888 | if (ACPI_FAILURE(status)) | |
889 | return -EINVAL; | |
890 | return 0; | |
891 | } | |
892 | ||
893 | static void acpi_device_remove_notify_handler(struct acpi_device *device) | |
894 | { | |
ccba2a36 | 895 | if (device->device_type == ACPI_BUS_TYPE_POWER_BUTTON) |
46ec8598 BH |
896 | acpi_remove_fixed_event_handler(ACPI_EVENT_POWER_BUTTON, |
897 | acpi_device_notify_fixed); | |
ccba2a36 | 898 | else if (device->device_type == ACPI_BUS_TYPE_SLEEP_BUTTON) |
46ec8598 BH |
899 | acpi_remove_fixed_event_handler(ACPI_EVENT_SLEEP_BUTTON, |
900 | acpi_device_notify_fixed); | |
901 | else | |
902 | acpi_remove_notify_handler(device->handle, ACPI_DEVICE_NOTIFY, | |
903 | acpi_device_notify); | |
904 | } | |
905 | ||
d9e455f5 | 906 | static int acpi_device_probe(struct device *dev) |
1da177e4 | 907 | { |
5d9464a4 PM |
908 | struct acpi_device *acpi_dev = to_acpi_device(dev); |
909 | struct acpi_driver *acpi_drv = to_acpi_driver(dev->driver); | |
910 | int ret; | |
911 | ||
24071f47 RW |
912 | if (acpi_dev->handler) |
913 | return -EINVAL; | |
914 | ||
d9e455f5 RW |
915 | if (!acpi_drv->ops.add) |
916 | return -ENOSYS; | |
46ec8598 | 917 | |
d9e455f5 RW |
918 | ret = acpi_drv->ops.add(acpi_dev); |
919 | if (ret) | |
920 | return ret; | |
46ec8598 | 921 | |
d9e455f5 RW |
922 | acpi_dev->driver = acpi_drv; |
923 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, | |
924 | "Driver [%s] successfully bound to device [%s]\n", | |
925 | acpi_drv->name, acpi_dev->pnp.bus_id)); | |
926 | ||
927 | if (acpi_drv->ops.notify) { | |
928 | ret = acpi_device_install_notify_handler(acpi_dev); | |
929 | if (ret) { | |
930 | if (acpi_drv->ops.remove) | |
931 | acpi_drv->ops.remove(acpi_dev); | |
932 | ||
933 | acpi_dev->driver = NULL; | |
934 | acpi_dev->driver_data = NULL; | |
935 | return ret; | |
936 | } | |
5d9464a4 | 937 | } |
d9e455f5 RW |
938 | |
939 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Found driver [%s] for device [%s]\n", | |
940 | acpi_drv->name, acpi_dev->pnp.bus_id)); | |
941 | get_device(dev); | |
942 | return 0; | |
5d9464a4 | 943 | } |
1da177e4 | 944 | |
5d9464a4 PM |
945 | static int acpi_device_remove(struct device * dev) |
946 | { | |
947 | struct acpi_device *acpi_dev = to_acpi_device(dev); | |
948 | struct acpi_driver *acpi_drv = acpi_dev->driver; | |
949 | ||
950 | if (acpi_drv) { | |
46ec8598 BH |
951 | if (acpi_drv->ops.notify) |
952 | acpi_device_remove_notify_handler(acpi_dev); | |
5d9464a4 | 953 | if (acpi_drv->ops.remove) |
51fac838 | 954 | acpi_drv->ops.remove(acpi_dev); |
1da177e4 | 955 | } |
5d9464a4 | 956 | acpi_dev->driver = NULL; |
db89b4f0 | 957 | acpi_dev->driver_data = NULL; |
1da177e4 | 958 | |
5d9464a4 | 959 | put_device(dev); |
9e89dde2 ZR |
960 | return 0; |
961 | } | |
1da177e4 | 962 | |
55955aad | 963 | struct bus_type acpi_bus_type = { |
9e89dde2 | 964 | .name = "acpi", |
5d9464a4 PM |
965 | .match = acpi_bus_match, |
966 | .probe = acpi_device_probe, | |
967 | .remove = acpi_device_remove, | |
968 | .uevent = acpi_device_uevent, | |
9e89dde2 ZR |
969 | }; |
970 | ||
cf860be6 RW |
971 | int acpi_device_add(struct acpi_device *device, |
972 | void (*release)(struct device *)) | |
1da177e4 | 973 | { |
4be44fcd | 974 | int result; |
e49bd2dd ZR |
975 | struct acpi_device_bus_id *acpi_device_bus_id, *new_bus_id; |
976 | int found = 0; | |
66b7ed40 | 977 | |
d43e167d RW |
978 | if (device->handle) { |
979 | acpi_status status; | |
980 | ||
981 | status = acpi_attach_data(device->handle, acpi_bus_data_handler, | |
982 | device); | |
983 | if (ACPI_FAILURE(status)) { | |
984 | acpi_handle_err(device->handle, | |
985 | "Unable to attach device data\n"); | |
986 | return -ENODEV; | |
987 | } | |
988 | } | |
989 | ||
9e89dde2 ZR |
990 | /* |
991 | * Linkage | |
992 | * ------- | |
993 | * Link this device to its parent and siblings. | |
994 | */ | |
995 | INIT_LIST_HEAD(&device->children); | |
996 | INIT_LIST_HEAD(&device->node); | |
9e89dde2 | 997 | INIT_LIST_HEAD(&device->wakeup_list); |
1033f904 LT |
998 | INIT_LIST_HEAD(&device->physical_node_list); |
999 | mutex_init(&device->physical_node_lock); | |
bc9b6407 | 1000 | INIT_LIST_HEAD(&device->power_dependent); |
1da177e4 | 1001 | |
e49bd2dd ZR |
1002 | new_bus_id = kzalloc(sizeof(struct acpi_device_bus_id), GFP_KERNEL); |
1003 | if (!new_bus_id) { | |
d43e167d RW |
1004 | pr_err(PREFIX "Memory allocation error\n"); |
1005 | result = -ENOMEM; | |
1006 | goto err_detach; | |
1da177e4 | 1007 | } |
e49bd2dd | 1008 | |
9090589d | 1009 | mutex_lock(&acpi_device_lock); |
e49bd2dd ZR |
1010 | /* |
1011 | * Find suitable bus_id and instance number in acpi_bus_id_list | |
1012 | * If failed, create one and link it into acpi_bus_id_list | |
1013 | */ | |
1014 | list_for_each_entry(acpi_device_bus_id, &acpi_bus_id_list, node) { | |
1131b938 BH |
1015 | if (!strcmp(acpi_device_bus_id->bus_id, |
1016 | acpi_device_hid(device))) { | |
1017 | acpi_device_bus_id->instance_no++; | |
e49bd2dd ZR |
1018 | found = 1; |
1019 | kfree(new_bus_id); | |
1020 | break; | |
1021 | } | |
1da177e4 | 1022 | } |
0c526d96 | 1023 | if (!found) { |
e49bd2dd | 1024 | acpi_device_bus_id = new_bus_id; |
1131b938 | 1025 | strcpy(acpi_device_bus_id->bus_id, acpi_device_hid(device)); |
e49bd2dd ZR |
1026 | acpi_device_bus_id->instance_no = 0; |
1027 | list_add_tail(&acpi_device_bus_id->node, &acpi_bus_id_list); | |
1da177e4 | 1028 | } |
0794469d | 1029 | dev_set_name(&device->dev, "%s:%02x", acpi_device_bus_id->bus_id, acpi_device_bus_id->instance_no); |
1da177e4 | 1030 | |
33b57150 | 1031 | if (device->parent) |
9e89dde2 | 1032 | list_add_tail(&device->node, &device->parent->children); |
33b57150 | 1033 | |
9e89dde2 ZR |
1034 | if (device->wakeup.flags.valid) |
1035 | list_add_tail(&device->wakeup_list, &acpi_wakeup_device_list); | |
9090589d | 1036 | mutex_unlock(&acpi_device_lock); |
1da177e4 | 1037 | |
1890a97a | 1038 | if (device->parent) |
66b7ed40 | 1039 | device->dev.parent = &device->parent->dev; |
1890a97a | 1040 | device->dev.bus = &acpi_bus_type; |
82c7d5ef | 1041 | device->dev.release = release; |
cf860be6 | 1042 | result = device_add(&device->dev); |
0c526d96 | 1043 | if (result) { |
8b12b922 | 1044 | dev_err(&device->dev, "Error registering device\n"); |
d43e167d | 1045 | goto err; |
1da177e4 | 1046 | } |
1da177e4 | 1047 | |
e49bd2dd | 1048 | result = acpi_device_setup_files(device); |
0c526d96 | 1049 | if (result) |
0794469d KS |
1050 | printk(KERN_ERR PREFIX "Error creating sysfs interface for device %s\n", |
1051 | dev_name(&device->dev)); | |
1da177e4 | 1052 | |
1da177e4 | 1053 | return 0; |
d43e167d RW |
1054 | |
1055 | err: | |
9090589d | 1056 | mutex_lock(&acpi_device_lock); |
33b57150 | 1057 | if (device->parent) |
e49bd2dd | 1058 | list_del(&device->node); |
e49bd2dd | 1059 | list_del(&device->wakeup_list); |
9090589d | 1060 | mutex_unlock(&acpi_device_lock); |
d43e167d RW |
1061 | |
1062 | err_detach: | |
1063 | acpi_detach_data(device->handle, acpi_bus_data_handler); | |
e49bd2dd | 1064 | return result; |
1da177e4 LT |
1065 | } |
1066 | ||
b17b537a | 1067 | static void acpi_device_unregister(struct acpi_device *device) |
9e89dde2 | 1068 | { |
9090589d | 1069 | mutex_lock(&acpi_device_lock); |
33b57150 | 1070 | if (device->parent) |
9e89dde2 | 1071 | list_del(&device->node); |
1da177e4 | 1072 | |
9e89dde2 | 1073 | list_del(&device->wakeup_list); |
9090589d | 1074 | mutex_unlock(&acpi_device_lock); |
1da177e4 | 1075 | |
9e89dde2 | 1076 | acpi_detach_data(device->handle, acpi_bus_data_handler); |
1890a97a | 1077 | |
bc9b6407 | 1078 | acpi_power_add_remove_device(device, false); |
f883d9db | 1079 | acpi_device_remove_files(device); |
b1c0f99b RW |
1080 | if (device->remove) |
1081 | device->remove(device); | |
1082 | ||
cf860be6 | 1083 | device_del(&device->dev); |
bc9b6407 | 1084 | /* |
0aa120a0 RW |
1085 | * Transition the device to D3cold to drop the reference counts of all |
1086 | * power resources the device depends on and turn off the ones that have | |
1087 | * no more references. | |
bc9b6407 | 1088 | */ |
0aa120a0 | 1089 | acpi_device_set_power(device, ACPI_STATE_D3_COLD); |
3757b948 | 1090 | device->handle = NULL; |
cf860be6 | 1091 | put_device(&device->dev); |
1da177e4 LT |
1092 | } |
1093 | ||
9e89dde2 ZR |
1094 | /* -------------------------------------------------------------------------- |
1095 | Driver Management | |
1096 | -------------------------------------------------------------------------- */ | |
9e89dde2 ZR |
1097 | /** |
1098 | * acpi_bus_register_driver - register a driver with the ACPI bus | |
1099 | * @driver: driver being registered | |
1100 | * | |
1101 | * Registers a driver with the ACPI bus. Searches the namespace for all | |
1102 | * devices that match the driver's criteria and binds. Returns zero for | |
1103 | * success or a negative error status for failure. | |
1104 | */ | |
1105 | int acpi_bus_register_driver(struct acpi_driver *driver) | |
1da177e4 | 1106 | { |
1890a97a | 1107 | int ret; |
1da177e4 | 1108 | |
9e89dde2 ZR |
1109 | if (acpi_disabled) |
1110 | return -ENODEV; | |
1890a97a PM |
1111 | driver->drv.name = driver->name; |
1112 | driver->drv.bus = &acpi_bus_type; | |
1113 | driver->drv.owner = driver->owner; | |
1da177e4 | 1114 | |
1890a97a PM |
1115 | ret = driver_register(&driver->drv); |
1116 | return ret; | |
9e89dde2 | 1117 | } |
1da177e4 | 1118 | |
9e89dde2 ZR |
1119 | EXPORT_SYMBOL(acpi_bus_register_driver); |
1120 | ||
1121 | /** | |
1122 | * acpi_bus_unregister_driver - unregisters a driver with the APIC bus | |
1123 | * @driver: driver to unregister | |
1124 | * | |
1125 | * Unregisters a driver with the ACPI bus. Searches the namespace for all | |
1126 | * devices that match the driver's criteria and unbinds. | |
1127 | */ | |
1128 | void acpi_bus_unregister_driver(struct acpi_driver *driver) | |
1129 | { | |
1890a97a | 1130 | driver_unregister(&driver->drv); |
9e89dde2 ZR |
1131 | } |
1132 | ||
1133 | EXPORT_SYMBOL(acpi_bus_unregister_driver); | |
1134 | ||
9e89dde2 ZR |
1135 | /* -------------------------------------------------------------------------- |
1136 | Device Enumeration | |
1137 | -------------------------------------------------------------------------- */ | |
5c478f49 BH |
1138 | static struct acpi_device *acpi_bus_get_parent(acpi_handle handle) |
1139 | { | |
456de893 | 1140 | struct acpi_device *device = NULL; |
5c478f49 | 1141 | acpi_status status; |
5c478f49 BH |
1142 | |
1143 | /* | |
1144 | * Fixed hardware devices do not appear in the namespace and do not | |
1145 | * have handles, but we fabricate acpi_devices for them, so we have | |
1146 | * to deal with them specially. | |
1147 | */ | |
456de893 | 1148 | if (!handle) |
5c478f49 BH |
1149 | return acpi_root; |
1150 | ||
1151 | do { | |
1152 | status = acpi_get_parent(handle, &handle); | |
5c478f49 | 1153 | if (ACPI_FAILURE(status)) |
456de893 RW |
1154 | return status == AE_NULL_ENTRY ? NULL : acpi_root; |
1155 | } while (acpi_bus_get_device(handle, &device)); | |
1156 | return device; | |
5c478f49 BH |
1157 | } |
1158 | ||
9e89dde2 ZR |
1159 | acpi_status |
1160 | acpi_bus_get_ejd(acpi_handle handle, acpi_handle *ejd) | |
1161 | { | |
1162 | acpi_status status; | |
1163 | acpi_handle tmp; | |
1164 | struct acpi_buffer buffer = {ACPI_ALLOCATE_BUFFER, NULL}; | |
1165 | union acpi_object *obj; | |
1166 | ||
1167 | status = acpi_get_handle(handle, "_EJD", &tmp); | |
1168 | if (ACPI_FAILURE(status)) | |
1169 | return status; | |
1170 | ||
1171 | status = acpi_evaluate_object(handle, "_EJD", NULL, &buffer); | |
1172 | if (ACPI_SUCCESS(status)) { | |
1173 | obj = buffer.pointer; | |
3b5fee59 HM |
1174 | status = acpi_get_handle(ACPI_ROOT_OBJECT, obj->string.pointer, |
1175 | ejd); | |
9e89dde2 ZR |
1176 | kfree(buffer.pointer); |
1177 | } | |
1178 | return status; | |
1179 | } | |
1180 | EXPORT_SYMBOL_GPL(acpi_bus_get_ejd); | |
1181 | ||
8e4319c4 | 1182 | void acpi_bus_data_handler(acpi_handle handle, void *context) |
9e89dde2 ZR |
1183 | { |
1184 | ||
1185 | /* TBD */ | |
1186 | ||
1187 | return; | |
1188 | } | |
1189 | ||
e88c9c60 RW |
1190 | static int acpi_bus_extract_wakeup_device_power_package(acpi_handle handle, |
1191 | struct acpi_device_wakeup *wakeup) | |
9e89dde2 | 1192 | { |
b581a7f9 RW |
1193 | struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; |
1194 | union acpi_object *package = NULL; | |
9e89dde2 | 1195 | union acpi_object *element = NULL; |
b581a7f9 | 1196 | acpi_status status; |
e88c9c60 | 1197 | int err = -ENODATA; |
9e89dde2 | 1198 | |
b581a7f9 | 1199 | if (!wakeup) |
e88c9c60 | 1200 | return -EINVAL; |
9e89dde2 | 1201 | |
993cbe59 | 1202 | INIT_LIST_HEAD(&wakeup->resources); |
9e89dde2 | 1203 | |
b581a7f9 RW |
1204 | /* _PRW */ |
1205 | status = acpi_evaluate_object(handle, "_PRW", NULL, &buffer); | |
1206 | if (ACPI_FAILURE(status)) { | |
1207 | ACPI_EXCEPTION((AE_INFO, status, "Evaluating _PRW")); | |
e88c9c60 | 1208 | return err; |
b581a7f9 RW |
1209 | } |
1210 | ||
1211 | package = (union acpi_object *)buffer.pointer; | |
1212 | ||
e88c9c60 | 1213 | if (!package || package->package.count < 2) |
b581a7f9 | 1214 | goto out; |
b581a7f9 | 1215 | |
9e89dde2 | 1216 | element = &(package->package.elements[0]); |
e88c9c60 | 1217 | if (!element) |
b581a7f9 | 1218 | goto out; |
e88c9c60 | 1219 | |
9e89dde2 ZR |
1220 | if (element->type == ACPI_TYPE_PACKAGE) { |
1221 | if ((element->package.count < 2) || | |
1222 | (element->package.elements[0].type != | |
1223 | ACPI_TYPE_LOCAL_REFERENCE) | |
e88c9c60 | 1224 | || (element->package.elements[1].type != ACPI_TYPE_INTEGER)) |
b581a7f9 | 1225 | goto out; |
e88c9c60 | 1226 | |
b581a7f9 | 1227 | wakeup->gpe_device = |
9e89dde2 | 1228 | element->package.elements[0].reference.handle; |
b581a7f9 | 1229 | wakeup->gpe_number = |
9e89dde2 ZR |
1230 | (u32) element->package.elements[1].integer.value; |
1231 | } else if (element->type == ACPI_TYPE_INTEGER) { | |
b581a7f9 RW |
1232 | wakeup->gpe_device = NULL; |
1233 | wakeup->gpe_number = element->integer.value; | |
1234 | } else { | |
b581a7f9 RW |
1235 | goto out; |
1236 | } | |
9e89dde2 ZR |
1237 | |
1238 | element = &(package->package.elements[1]); | |
e88c9c60 | 1239 | if (element->type != ACPI_TYPE_INTEGER) |
b581a7f9 | 1240 | goto out; |
e88c9c60 | 1241 | |
b581a7f9 | 1242 | wakeup->sleep_state = element->integer.value; |
9e89dde2 | 1243 | |
e88c9c60 RW |
1244 | err = acpi_extract_power_resources(package, 2, &wakeup->resources); |
1245 | if (err) | |
b581a7f9 | 1246 | goto out; |
9e89dde2 | 1247 | |
0596a52b RW |
1248 | if (!list_empty(&wakeup->resources)) { |
1249 | int sleep_state; | |
9e89dde2 | 1250 | |
b5d667eb RW |
1251 | err = acpi_power_wakeup_list_init(&wakeup->resources, |
1252 | &sleep_state); | |
1253 | if (err) { | |
1254 | acpi_handle_warn(handle, "Retrieving current states " | |
1255 | "of wakeup power resources failed\n"); | |
1256 | acpi_power_resources_list_free(&wakeup->resources); | |
1257 | goto out; | |
1258 | } | |
0596a52b RW |
1259 | if (sleep_state < wakeup->sleep_state) { |
1260 | acpi_handle_warn(handle, "Overriding _PRW sleep state " | |
1261 | "(S%d) by S%d from power resources\n", | |
1262 | (int)wakeup->sleep_state, sleep_state); | |
1263 | wakeup->sleep_state = sleep_state; | |
1264 | } | |
1265 | } | |
bba63a29 | 1266 | acpi_setup_gpe_for_wake(handle, wakeup->gpe_device, wakeup->gpe_number); |
9874647b | 1267 | |
b581a7f9 RW |
1268 | out: |
1269 | kfree(buffer.pointer); | |
e88c9c60 | 1270 | return err; |
1da177e4 LT |
1271 | } |
1272 | ||
f517709d | 1273 | static void acpi_bus_set_run_wake_flags(struct acpi_device *device) |
1da177e4 | 1274 | { |
29b71a1c | 1275 | struct acpi_device_id button_device_ids[] = { |
29b71a1c | 1276 | {"PNP0C0C", 0}, |
b7e38304 | 1277 | {"PNP0C0D", 0}, |
29b71a1c TR |
1278 | {"PNP0C0E", 0}, |
1279 | {"", 0}, | |
1280 | }; | |
f517709d RW |
1281 | acpi_status status; |
1282 | acpi_event_status event_status; | |
1283 | ||
b67ea761 | 1284 | device->wakeup.flags.notifier_present = 0; |
f517709d RW |
1285 | |
1286 | /* Power button, Lid switch always enable wakeup */ | |
1287 | if (!acpi_match_device_ids(device, button_device_ids)) { | |
1288 | device->wakeup.flags.run_wake = 1; | |
b7e38304 ZR |
1289 | if (!acpi_match_device_ids(device, &button_device_ids[1])) { |
1290 | /* Do not use Lid/sleep button for S5 wakeup */ | |
1291 | if (device->wakeup.sleep_state == ACPI_STATE_S5) | |
1292 | device->wakeup.sleep_state = ACPI_STATE_S4; | |
1293 | } | |
f2b56bc8 | 1294 | device_set_wakeup_capable(&device->dev, true); |
f517709d RW |
1295 | return; |
1296 | } | |
1297 | ||
e8e18c95 RW |
1298 | status = acpi_get_gpe_status(device->wakeup.gpe_device, |
1299 | device->wakeup.gpe_number, | |
1300 | &event_status); | |
f517709d RW |
1301 | if (status == AE_OK) |
1302 | device->wakeup.flags.run_wake = | |
1303 | !!(event_status & ACPI_EVENT_FLAG_HANDLE); | |
1304 | } | |
1305 | ||
d57d09a4 | 1306 | static void acpi_bus_get_wakeup_device_flags(struct acpi_device *device) |
f517709d | 1307 | { |
e88c9c60 | 1308 | int err; |
29b71a1c | 1309 | |
d57d09a4 | 1310 | /* Presence of _PRW indicates wake capable */ |
952c63e9 | 1311 | if (!acpi_has_method(device->handle, "_PRW")) |
d57d09a4 RW |
1312 | return; |
1313 | ||
e88c9c60 RW |
1314 | err = acpi_bus_extract_wakeup_device_power_package(device->handle, |
1315 | &device->wakeup); | |
1316 | if (err) { | |
1317 | dev_err(&device->dev, "_PRW evaluation error: %d\n", err); | |
d57d09a4 | 1318 | return; |
9e89dde2 | 1319 | } |
1da177e4 | 1320 | |
9e89dde2 | 1321 | device->wakeup.flags.valid = 1; |
9b83ccd2 | 1322 | device->wakeup.prepare_count = 0; |
f517709d | 1323 | acpi_bus_set_run_wake_flags(device); |
729b2bdb ZY |
1324 | /* Call _PSW/_DSW object to disable its ability to wake the sleeping |
1325 | * system for the ACPI device with the _PRW object. | |
1326 | * The _PSW object is depreciated in ACPI 3.0 and is replaced by _DSW. | |
1327 | * So it is necessary to call _DSW object first. Only when it is not | |
1328 | * present will the _PSW object used. | |
1329 | */ | |
e88c9c60 RW |
1330 | err = acpi_device_sleep_wake(device, 0, 0, 0); |
1331 | if (err) | |
77e76609 RW |
1332 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
1333 | "error in _DSW or _PSW evaluation\n")); | |
1da177e4 | 1334 | } |
1da177e4 | 1335 | |
f33ce568 RW |
1336 | static void acpi_bus_init_power_state(struct acpi_device *device, int state) |
1337 | { | |
1338 | struct acpi_device_power_state *ps = &device->power.states[state]; | |
ef85bdbe RW |
1339 | char pathname[5] = { '_', 'P', 'R', '0' + state, '\0' }; |
1340 | struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; | |
f33ce568 | 1341 | acpi_status status; |
bf325f95 | 1342 | |
f33ce568 RW |
1343 | INIT_LIST_HEAD(&ps->resources); |
1344 | ||
ef85bdbe RW |
1345 | /* Evaluate "_PRx" to get referenced power resources */ |
1346 | status = acpi_evaluate_object(device->handle, pathname, NULL, &buffer); | |
1347 | if (ACPI_SUCCESS(status)) { | |
1348 | union acpi_object *package = buffer.pointer; | |
1349 | ||
1350 | if (buffer.length && package | |
1351 | && package->type == ACPI_TYPE_PACKAGE | |
1352 | && package->package.count) { | |
e88c9c60 RW |
1353 | int err = acpi_extract_power_resources(package, 0, |
1354 | &ps->resources); | |
1355 | if (!err) | |
ef85bdbe | 1356 | device->power.flags.power_resources = 1; |
f33ce568 | 1357 | } |
ef85bdbe | 1358 | ACPI_FREE(buffer.pointer); |
f33ce568 RW |
1359 | } |
1360 | ||
1361 | /* Evaluate "_PSx" to see if we can do explicit sets */ | |
ef85bdbe | 1362 | pathname[2] = 'S'; |
952c63e9 | 1363 | if (acpi_has_method(device->handle, pathname)) |
f33ce568 RW |
1364 | ps->flags.explicit_set = 1; |
1365 | ||
1366 | /* | |
1367 | * State is valid if there are means to put the device into it. | |
1368 | * D3hot is only valid if _PR3 present. | |
1369 | */ | |
ef85bdbe | 1370 | if (!list_empty(&ps->resources) |
f33ce568 RW |
1371 | || (ps->flags.explicit_set && state < ACPI_STATE_D3_HOT)) { |
1372 | ps->flags.valid = 1; | |
1373 | ps->flags.os_accessible = 1; | |
1374 | } | |
1375 | ||
1376 | ps->power = -1; /* Unknown - driver assigned */ | |
1377 | ps->latency = -1; /* Unknown - driver assigned */ | |
1378 | } | |
1379 | ||
d43e167d | 1380 | static void acpi_bus_get_power_flags(struct acpi_device *device) |
1da177e4 | 1381 | { |
8bc5053b | 1382 | u32 i; |
1a365616 | 1383 | |
d43e167d | 1384 | /* Presence of _PS0|_PR0 indicates 'power manageable' */ |
952c63e9 JL |
1385 | if (!acpi_has_method(device->handle, "_PS0") && |
1386 | !acpi_has_method(device->handle, "_PR0")) | |
1387 | return; | |
1a365616 | 1388 | |
d43e167d | 1389 | device->flags.power_manageable = 1; |
4be44fcd | 1390 | |
9e89dde2 ZR |
1391 | /* |
1392 | * Power Management Flags | |
1393 | */ | |
952c63e9 | 1394 | if (acpi_has_method(device->handle, "_PSC")) |
9e89dde2 | 1395 | device->power.flags.explicit_get = 1; |
952c63e9 | 1396 | if (acpi_has_method(device->handle, "_IRC")) |
9e89dde2 | 1397 | device->power.flags.inrush_current = 1; |
1da177e4 | 1398 | |
9e89dde2 ZR |
1399 | /* |
1400 | * Enumerate supported power management states | |
1401 | */ | |
f33ce568 RW |
1402 | for (i = ACPI_STATE_D0; i <= ACPI_STATE_D3_HOT; i++) |
1403 | acpi_bus_init_power_state(device, i); | |
bf325f95 | 1404 | |
0b224527 | 1405 | INIT_LIST_HEAD(&device->power.states[ACPI_STATE_D3_COLD].resources); |
1da177e4 | 1406 | |
9e89dde2 ZR |
1407 | /* Set defaults for D0 and D3 states (always valid) */ |
1408 | device->power.states[ACPI_STATE_D0].flags.valid = 1; | |
1409 | device->power.states[ACPI_STATE_D0].power = 100; | |
1410 | device->power.states[ACPI_STATE_D3].flags.valid = 1; | |
1411 | device->power.states[ACPI_STATE_D3].power = 0; | |
c8f7a62c | 1412 | |
5c7dd710 RW |
1413 | /* Set D3cold's explicit_set flag if _PS3 exists. */ |
1414 | if (device->power.states[ACPI_STATE_D3_HOT].flags.explicit_set) | |
1415 | device->power.states[ACPI_STATE_D3_COLD].flags.explicit_set = 1; | |
1416 | ||
1399dfcd AL |
1417 | /* Presence of _PS3 or _PRx means we can put the device into D3 cold */ |
1418 | if (device->power.states[ACPI_STATE_D3_HOT].flags.explicit_set || | |
1419 | device->power.flags.power_resources) | |
1420 | device->power.states[ACPI_STATE_D3_COLD].flags.os_accessible = 1; | |
1421 | ||
b3785492 RW |
1422 | if (acpi_bus_init_power(device)) { |
1423 | acpi_free_power_resources_lists(device); | |
1424 | device->flags.power_manageable = 0; | |
1425 | } | |
9e89dde2 | 1426 | } |
c8f7a62c | 1427 | |
d43e167d | 1428 | static void acpi_bus_get_flags(struct acpi_device *device) |
1da177e4 | 1429 | { |
1da177e4 | 1430 | /* Presence of _STA indicates 'dynamic_status' */ |
952c63e9 | 1431 | if (acpi_has_method(device->handle, "_STA")) |
1da177e4 LT |
1432 | device->flags.dynamic_status = 1; |
1433 | ||
1da177e4 | 1434 | /* Presence of _RMV indicates 'removable' */ |
952c63e9 | 1435 | if (acpi_has_method(device->handle, "_RMV")) |
1da177e4 LT |
1436 | device->flags.removable = 1; |
1437 | ||
1438 | /* Presence of _EJD|_EJ0 indicates 'ejectable' */ | |
952c63e9 JL |
1439 | if (acpi_has_method(device->handle, "_EJD") || |
1440 | acpi_has_method(device->handle, "_EJ0")) | |
1da177e4 | 1441 | device->flags.ejectable = 1; |
1da177e4 LT |
1442 | } |
1443 | ||
c7bcb4e9 | 1444 | static void acpi_device_get_busid(struct acpi_device *device) |
1da177e4 | 1445 | { |
4be44fcd LB |
1446 | char bus_id[5] = { '?', 0 }; |
1447 | struct acpi_buffer buffer = { sizeof(bus_id), bus_id }; | |
1448 | int i = 0; | |
1da177e4 LT |
1449 | |
1450 | /* | |
1451 | * Bus ID | |
1452 | * ------ | |
1453 | * The device's Bus ID is simply the object name. | |
1454 | * TBD: Shouldn't this value be unique (within the ACPI namespace)? | |
1455 | */ | |
859ac9a4 | 1456 | if (ACPI_IS_ROOT_DEVICE(device)) { |
1da177e4 | 1457 | strcpy(device->pnp.bus_id, "ACPI"); |
859ac9a4 BH |
1458 | return; |
1459 | } | |
1460 | ||
1461 | switch (device->device_type) { | |
1da177e4 LT |
1462 | case ACPI_BUS_TYPE_POWER_BUTTON: |
1463 | strcpy(device->pnp.bus_id, "PWRF"); | |
1464 | break; | |
1465 | case ACPI_BUS_TYPE_SLEEP_BUTTON: | |
1466 | strcpy(device->pnp.bus_id, "SLPF"); | |
1467 | break; | |
1468 | default: | |
66b7ed40 | 1469 | acpi_get_name(device->handle, ACPI_SINGLE_NAME, &buffer); |
1da177e4 LT |
1470 | /* Clean up trailing underscores (if any) */ |
1471 | for (i = 3; i > 1; i--) { | |
1472 | if (bus_id[i] == '_') | |
1473 | bus_id[i] = '\0'; | |
1474 | else | |
1475 | break; | |
1476 | } | |
1477 | strcpy(device->pnp.bus_id, bus_id); | |
1478 | break; | |
1479 | } | |
1480 | } | |
1481 | ||
54735266 | 1482 | /* |
d4e1a692 | 1483 | * acpi_bay_match - see if an acpi object is an ejectable driver bay |
54735266 ZR |
1484 | * |
1485 | * If an acpi object is ejectable and has one of the ACPI ATA methods defined, | |
1486 | * then we can safely call it an ejectable drive bay | |
1487 | */ | |
d4e1a692 TK |
1488 | static int acpi_bay_match(acpi_handle handle) |
1489 | { | |
54735266 ZR |
1490 | acpi_handle phandle; |
1491 | ||
952c63e9 | 1492 | if (!acpi_has_method(handle, "_EJ0")) |
54735266 ZR |
1493 | return -ENODEV; |
1494 | ||
952c63e9 JL |
1495 | if (acpi_has_method(handle, "_GTF") || |
1496 | acpi_has_method(handle, "_GTM") || | |
1497 | acpi_has_method(handle, "_STM") || | |
1498 | acpi_has_method(handle, "_SDD")) | |
54735266 ZR |
1499 | return 0; |
1500 | ||
1501 | if (acpi_get_parent(handle, &phandle)) | |
1502 | return -ENODEV; | |
1503 | ||
952c63e9 JL |
1504 | if (acpi_has_method(phandle, "_GTF") || |
1505 | acpi_has_method(phandle, "_GTM") || | |
1506 | acpi_has_method(phandle, "_STM") || | |
1507 | acpi_has_method(phandle, "_SDD")) | |
54735266 ZR |
1508 | return 0; |
1509 | ||
1510 | return -ENODEV; | |
1511 | } | |
1512 | ||
3620f2f2 | 1513 | /* |
d4e1a692 | 1514 | * acpi_dock_match - see if an acpi object has a _DCK method |
3620f2f2 | 1515 | */ |
d4e1a692 | 1516 | static int acpi_dock_match(acpi_handle handle) |
3620f2f2 FS |
1517 | { |
1518 | acpi_handle tmp; | |
d4e1a692 | 1519 | return acpi_get_handle(handle, "_DCK", &tmp); |
3620f2f2 FS |
1520 | } |
1521 | ||
620e112c | 1522 | const char *acpi_device_hid(struct acpi_device *device) |
15b8dd53 | 1523 | { |
7f47fa6c | 1524 | struct acpi_hardware_id *hid; |
15b8dd53 | 1525 | |
2b2ae7c7 TR |
1526 | if (list_empty(&device->pnp.ids)) |
1527 | return dummy_hid; | |
1528 | ||
7f47fa6c BH |
1529 | hid = list_first_entry(&device->pnp.ids, struct acpi_hardware_id, list); |
1530 | return hid->id; | |
1531 | } | |
1532 | EXPORT_SYMBOL(acpi_device_hid); | |
15b8dd53 | 1533 | |
d4e1a692 | 1534 | static void acpi_add_id(struct acpi_device_pnp *pnp, const char *dev_id) |
7f47fa6c BH |
1535 | { |
1536 | struct acpi_hardware_id *id; | |
15b8dd53 | 1537 | |
7f47fa6c BH |
1538 | id = kmalloc(sizeof(*id), GFP_KERNEL); |
1539 | if (!id) | |
1540 | return; | |
15b8dd53 | 1541 | |
581de59e | 1542 | id->id = kstrdup(dev_id, GFP_KERNEL); |
7f47fa6c BH |
1543 | if (!id->id) { |
1544 | kfree(id); | |
1545 | return; | |
15b8dd53 BM |
1546 | } |
1547 | ||
d4e1a692 TK |
1548 | list_add_tail(&id->list, &pnp->ids); |
1549 | pnp->type.hardware_id = 1; | |
15b8dd53 BM |
1550 | } |
1551 | ||
222e82ac DW |
1552 | /* |
1553 | * Old IBM workstations have a DSDT bug wherein the SMBus object | |
1554 | * lacks the SMBUS01 HID and the methods do not have the necessary "_" | |
1555 | * prefix. Work around this. | |
1556 | */ | |
d4e1a692 | 1557 | static int acpi_ibm_smbus_match(acpi_handle handle) |
222e82ac | 1558 | { |
222e82ac DW |
1559 | struct acpi_buffer path = {ACPI_ALLOCATE_BUFFER, NULL}; |
1560 | int result; | |
1561 | ||
1562 | if (!dmi_name_in_vendors("IBM")) | |
1563 | return -ENODEV; | |
1564 | ||
1565 | /* Look for SMBS object */ | |
d4e1a692 | 1566 | result = acpi_get_name(handle, ACPI_SINGLE_NAME, &path); |
222e82ac DW |
1567 | if (result) |
1568 | return result; | |
1569 | ||
1570 | if (strcmp("SMBS", path.pointer)) { | |
1571 | result = -ENODEV; | |
1572 | goto out; | |
1573 | } | |
1574 | ||
1575 | /* Does it have the necessary (but misnamed) methods? */ | |
1576 | result = -ENODEV; | |
952c63e9 JL |
1577 | if (acpi_has_method(handle, "SBI") && |
1578 | acpi_has_method(handle, "SBR") && | |
1579 | acpi_has_method(handle, "SBW")) | |
222e82ac DW |
1580 | result = 0; |
1581 | out: | |
1582 | kfree(path.pointer); | |
1583 | return result; | |
1584 | } | |
1585 | ||
c0af4175 TK |
1586 | static void acpi_set_pnp_ids(acpi_handle handle, struct acpi_device_pnp *pnp, |
1587 | int device_type) | |
1da177e4 | 1588 | { |
4be44fcd | 1589 | acpi_status status; |
57f3674f | 1590 | struct acpi_device_info *info; |
78e25fef | 1591 | struct acpi_pnp_device_id_list *cid_list; |
7f47fa6c | 1592 | int i; |
1da177e4 | 1593 | |
c0af4175 | 1594 | switch (device_type) { |
1da177e4 | 1595 | case ACPI_BUS_TYPE_DEVICE: |
c0af4175 TK |
1596 | if (handle == ACPI_ROOT_OBJECT) { |
1597 | acpi_add_id(pnp, ACPI_SYSTEM_HID); | |
859ac9a4 BH |
1598 | break; |
1599 | } | |
1600 | ||
c0af4175 | 1601 | status = acpi_get_object_info(handle, &info); |
1da177e4 | 1602 | if (ACPI_FAILURE(status)) { |
c0af4175 TK |
1603 | pr_err(PREFIX "%s: Error reading device info\n", |
1604 | __func__); | |
1da177e4 LT |
1605 | return; |
1606 | } | |
1607 | ||
1da177e4 | 1608 | if (info->valid & ACPI_VALID_HID) |
c0af4175 | 1609 | acpi_add_id(pnp, info->hardware_id.string); |
57f3674f | 1610 | if (info->valid & ACPI_VALID_CID) { |
15b8dd53 | 1611 | cid_list = &info->compatible_id_list; |
57f3674f | 1612 | for (i = 0; i < cid_list->count; i++) |
c0af4175 | 1613 | acpi_add_id(pnp, cid_list->ids[i].string); |
57f3674f | 1614 | } |
1da177e4 | 1615 | if (info->valid & ACPI_VALID_ADR) { |
c0af4175 TK |
1616 | pnp->bus_address = info->address; |
1617 | pnp->type.bus_address = 1; | |
1da177e4 | 1618 | } |
ccf78040 | 1619 | if (info->valid & ACPI_VALID_UID) |
c0af4175 | 1620 | pnp->unique_id = kstrdup(info->unique_id.string, |
ccf78040 | 1621 | GFP_KERNEL); |
ae843332 | 1622 | |
a83893ae BH |
1623 | kfree(info); |
1624 | ||
57f3674f BH |
1625 | /* |
1626 | * Some devices don't reliably have _HIDs & _CIDs, so add | |
1627 | * synthetic HIDs to make sure drivers can find them. | |
1628 | */ | |
c0af4175 TK |
1629 | if (acpi_is_video_device(handle)) |
1630 | acpi_add_id(pnp, ACPI_VIDEO_HID); | |
1631 | else if (ACPI_SUCCESS(acpi_bay_match(handle))) | |
1632 | acpi_add_id(pnp, ACPI_BAY_HID); | |
1633 | else if (ACPI_SUCCESS(acpi_dock_match(handle))) | |
1634 | acpi_add_id(pnp, ACPI_DOCK_HID); | |
1635 | else if (!acpi_ibm_smbus_match(handle)) | |
1636 | acpi_add_id(pnp, ACPI_SMBUS_IBM_HID); | |
1637 | else if (list_empty(&pnp->ids) && handle == ACPI_ROOT_OBJECT) { | |
1638 | acpi_add_id(pnp, ACPI_BUS_HID); /* \_SB, LNXSYBUS */ | |
1639 | strcpy(pnp->device_name, ACPI_BUS_DEVICE_NAME); | |
1640 | strcpy(pnp->device_class, ACPI_BUS_CLASS); | |
b7b30de5 | 1641 | } |
54735266 | 1642 | |
1da177e4 LT |
1643 | break; |
1644 | case ACPI_BUS_TYPE_POWER: | |
c0af4175 | 1645 | acpi_add_id(pnp, ACPI_POWER_HID); |
1da177e4 LT |
1646 | break; |
1647 | case ACPI_BUS_TYPE_PROCESSOR: | |
c0af4175 | 1648 | acpi_add_id(pnp, ACPI_PROCESSOR_OBJECT_HID); |
1da177e4 | 1649 | break; |
1da177e4 | 1650 | case ACPI_BUS_TYPE_THERMAL: |
c0af4175 | 1651 | acpi_add_id(pnp, ACPI_THERMAL_HID); |
1da177e4 LT |
1652 | break; |
1653 | case ACPI_BUS_TYPE_POWER_BUTTON: | |
c0af4175 | 1654 | acpi_add_id(pnp, ACPI_BUTTON_HID_POWERF); |
1da177e4 LT |
1655 | break; |
1656 | case ACPI_BUS_TYPE_SLEEP_BUTTON: | |
c0af4175 | 1657 | acpi_add_id(pnp, ACPI_BUTTON_HID_SLEEPF); |
1da177e4 LT |
1658 | break; |
1659 | } | |
1da177e4 LT |
1660 | } |
1661 | ||
c0af4175 TK |
1662 | void acpi_free_pnp_ids(struct acpi_device_pnp *pnp) |
1663 | { | |
1664 | struct acpi_hardware_id *id, *tmp; | |
1665 | ||
1666 | list_for_each_entry_safe(id, tmp, &pnp->ids, list) { | |
1667 | kfree(id->id); | |
1668 | kfree(id); | |
1669 | } | |
1670 | kfree(pnp->unique_id); | |
1671 | } | |
1672 | ||
82c7d5ef RW |
1673 | void acpi_init_device_object(struct acpi_device *device, acpi_handle handle, |
1674 | int type, unsigned long long sta) | |
1da177e4 | 1675 | { |
d43e167d RW |
1676 | INIT_LIST_HEAD(&device->pnp.ids); |
1677 | device->device_type = type; | |
1678 | device->handle = handle; | |
1679 | device->parent = acpi_bus_get_parent(handle); | |
1680 | STRUCT_TO_INT(device->status) = sta; | |
1681 | acpi_device_get_busid(device); | |
c0af4175 | 1682 | acpi_set_pnp_ids(handle, &device->pnp, type); |
d43e167d | 1683 | acpi_bus_get_flags(device); |
2c0d4fe0 | 1684 | device->flags.match_driver = false; |
cf860be6 RW |
1685 | device_initialize(&device->dev); |
1686 | dev_set_uevent_suppress(&device->dev, true); | |
1687 | } | |
bc3b0772 | 1688 | |
cf860be6 RW |
1689 | void acpi_device_add_finalize(struct acpi_device *device) |
1690 | { | |
2c0d4fe0 | 1691 | device->flags.match_driver = true; |
cf860be6 RW |
1692 | dev_set_uevent_suppress(&device->dev, false); |
1693 | kobject_uevent(&device->dev.kobj, KOBJ_ADD); | |
1da177e4 LT |
1694 | } |
1695 | ||
5c478f49 BH |
1696 | static int acpi_add_single_object(struct acpi_device **child, |
1697 | acpi_handle handle, int type, | |
2c0d4fe0 | 1698 | unsigned long long sta) |
1da177e4 | 1699 | { |
77c24888 BH |
1700 | int result; |
1701 | struct acpi_device *device; | |
29aaefa6 | 1702 | struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; |
1da177e4 | 1703 | |
36bcbec7 | 1704 | device = kzalloc(sizeof(struct acpi_device), GFP_KERNEL); |
1da177e4 | 1705 | if (!device) { |
6468463a | 1706 | printk(KERN_ERR PREFIX "Memory allocation error\n"); |
d550d98d | 1707 | return -ENOMEM; |
1da177e4 | 1708 | } |
1da177e4 | 1709 | |
d43e167d RW |
1710 | acpi_init_device_object(device, handle, type, sta); |
1711 | acpi_bus_get_power_flags(device); | |
d57d09a4 | 1712 | acpi_bus_get_wakeup_device_flags(device); |
1da177e4 | 1713 | |
cf860be6 | 1714 | result = acpi_device_add(device, acpi_device_release); |
d43e167d | 1715 | if (result) { |
718fb0de | 1716 | acpi_device_release(&device->dev); |
d43e167d RW |
1717 | return result; |
1718 | } | |
1da177e4 | 1719 | |
d43e167d | 1720 | acpi_power_add_remove_device(device, true); |
cf860be6 | 1721 | acpi_device_add_finalize(device); |
d43e167d RW |
1722 | acpi_get_name(handle, ACPI_FULL_PATHNAME, &buffer); |
1723 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Added %s [%s] parent %s\n", | |
1724 | dev_name(&device->dev), (char *) buffer.pointer, | |
1725 | device->parent ? dev_name(&device->parent->dev) : "(null)")); | |
1726 | kfree(buffer.pointer); | |
1727 | *child = device; | |
1728 | return 0; | |
bf325f95 RW |
1729 | } |
1730 | ||
778cbc1d BH |
1731 | static int acpi_bus_type_and_status(acpi_handle handle, int *type, |
1732 | unsigned long long *sta) | |
1da177e4 | 1733 | { |
778cbc1d BH |
1734 | acpi_status status; |
1735 | acpi_object_type acpi_type; | |
1da177e4 | 1736 | |
778cbc1d | 1737 | status = acpi_get_type(handle, &acpi_type); |
51a85faf | 1738 | if (ACPI_FAILURE(status)) |
778cbc1d | 1739 | return -ENODEV; |
4be44fcd | 1740 | |
778cbc1d | 1741 | switch (acpi_type) { |
51a85faf BH |
1742 | case ACPI_TYPE_ANY: /* for ACPI_ROOT_OBJECT */ |
1743 | case ACPI_TYPE_DEVICE: | |
778cbc1d BH |
1744 | *type = ACPI_BUS_TYPE_DEVICE; |
1745 | status = acpi_bus_get_status_handle(handle, sta); | |
1746 | if (ACPI_FAILURE(status)) | |
1747 | return -ENODEV; | |
51a85faf BH |
1748 | break; |
1749 | case ACPI_TYPE_PROCESSOR: | |
778cbc1d BH |
1750 | *type = ACPI_BUS_TYPE_PROCESSOR; |
1751 | status = acpi_bus_get_status_handle(handle, sta); | |
1752 | if (ACPI_FAILURE(status)) | |
1753 | return -ENODEV; | |
51a85faf BH |
1754 | break; |
1755 | case ACPI_TYPE_THERMAL: | |
778cbc1d BH |
1756 | *type = ACPI_BUS_TYPE_THERMAL; |
1757 | *sta = ACPI_STA_DEFAULT; | |
51a85faf BH |
1758 | break; |
1759 | case ACPI_TYPE_POWER: | |
778cbc1d BH |
1760 | *type = ACPI_BUS_TYPE_POWER; |
1761 | *sta = ACPI_STA_DEFAULT; | |
51a85faf BH |
1762 | break; |
1763 | default: | |
778cbc1d | 1764 | return -ENODEV; |
51a85faf | 1765 | } |
1da177e4 | 1766 | |
778cbc1d BH |
1767 | return 0; |
1768 | } | |
1769 | ||
4b59cc1f RW |
1770 | static bool acpi_scan_handler_matching(struct acpi_scan_handler *handler, |
1771 | char *idstr, | |
1772 | const struct acpi_device_id **matchid) | |
1773 | { | |
1774 | const struct acpi_device_id *devid; | |
1775 | ||
1776 | for (devid = handler->ids; devid->id[0]; devid++) | |
1777 | if (!strcmp((char *)devid->id, idstr)) { | |
1778 | if (matchid) | |
1779 | *matchid = devid; | |
1780 | ||
1781 | return true; | |
1782 | } | |
1783 | ||
1784 | return false; | |
1785 | } | |
1786 | ||
6b772e8f TK |
1787 | static struct acpi_scan_handler *acpi_scan_match_handler(char *idstr, |
1788 | const struct acpi_device_id **matchid) | |
1789 | { | |
1790 | struct acpi_scan_handler *handler; | |
1791 | ||
1792 | list_for_each_entry(handler, &acpi_scan_handlers_list, list_node) | |
1793 | if (acpi_scan_handler_matching(handler, idstr, matchid)) | |
1794 | return handler; | |
1795 | ||
1796 | return NULL; | |
1797 | } | |
1798 | ||
3f8055c3 RW |
1799 | void acpi_scan_hotplug_enabled(struct acpi_hotplug_profile *hotplug, bool val) |
1800 | { | |
3f8055c3 RW |
1801 | if (!!hotplug->enabled == !!val) |
1802 | return; | |
1803 | ||
1804 | mutex_lock(&acpi_scan_lock); | |
1805 | ||
1806 | hotplug->enabled = val; | |
3f8055c3 RW |
1807 | |
1808 | mutex_unlock(&acpi_scan_lock); | |
1809 | } | |
1810 | ||
6b772e8f | 1811 | static void acpi_scan_init_hotplug(acpi_handle handle, int type) |
a33ec399 | 1812 | { |
6b772e8f TK |
1813 | struct acpi_device_pnp pnp = {}; |
1814 | struct acpi_hardware_id *hwid; | |
a33ec399 RW |
1815 | struct acpi_scan_handler *handler; |
1816 | ||
6b772e8f TK |
1817 | INIT_LIST_HEAD(&pnp.ids); |
1818 | acpi_set_pnp_ids(handle, &pnp, type); | |
a33ec399 | 1819 | |
6b772e8f | 1820 | if (!pnp.type.hardware_id) |
7a26b530 | 1821 | goto out; |
a33ec399 RW |
1822 | |
1823 | /* | |
1824 | * This relies on the fact that acpi_install_notify_handler() will not | |
1825 | * install the same notify handler routine twice for the same handle. | |
1826 | */ | |
6b772e8f TK |
1827 | list_for_each_entry(hwid, &pnp.ids, list) { |
1828 | handler = acpi_scan_match_handler(hwid->id, NULL); | |
1829 | if (handler) { | |
2cbb14fb TK |
1830 | acpi_install_notify_handler(handle, ACPI_SYSTEM_NOTIFY, |
1831 | acpi_hotplug_notify_cb, handler); | |
6b772e8f TK |
1832 | break; |
1833 | } | |
1834 | } | |
1835 | ||
7a26b530 | 1836 | out: |
6b772e8f | 1837 | acpi_free_pnp_ids(&pnp); |
a33ec399 RW |
1838 | } |
1839 | ||
e3863094 RW |
1840 | static acpi_status acpi_bus_check_add(acpi_handle handle, u32 lvl_not_used, |
1841 | void *not_used, void **return_value) | |
778cbc1d | 1842 | { |
805d410f | 1843 | struct acpi_device *device = NULL; |
778cbc1d BH |
1844 | int type; |
1845 | unsigned long long sta; | |
1846 | int result; | |
1847 | ||
4002bf38 RW |
1848 | acpi_bus_get_device(handle, &device); |
1849 | if (device) | |
1850 | goto out; | |
1851 | ||
778cbc1d BH |
1852 | result = acpi_bus_type_and_status(handle, &type, &sta); |
1853 | if (result) | |
1854 | return AE_OK; | |
1855 | ||
82c7d5ef RW |
1856 | if (type == ACPI_BUS_TYPE_POWER) { |
1857 | acpi_add_power_resource(handle); | |
1858 | return AE_OK; | |
1859 | } | |
1860 | ||
6b772e8f | 1861 | acpi_scan_init_hotplug(handle, type); |
a33ec399 | 1862 | |
778cbc1d | 1863 | if (!(sta & ACPI_STA_DEVICE_PRESENT) && |
b581a7f9 | 1864 | !(sta & ACPI_STA_DEVICE_FUNCTIONING)) { |
86e4e20e | 1865 | struct acpi_device_wakeup wakeup; |
86e4e20e | 1866 | |
952c63e9 | 1867 | if (acpi_has_method(handle, "_PRW")) { |
86e4e20e RW |
1868 | acpi_bus_extract_wakeup_device_power_package(handle, |
1869 | &wakeup); | |
993cbe59 RW |
1870 | acpi_power_resources_list_free(&wakeup.resources); |
1871 | } | |
778cbc1d | 1872 | return AE_CTRL_DEPTH; |
b581a7f9 | 1873 | } |
778cbc1d | 1874 | |
2c0d4fe0 | 1875 | acpi_add_single_object(&device, handle, type, sta); |
e3b87f8a | 1876 | if (!device) |
51a85faf | 1877 | return AE_CTRL_DEPTH; |
1da177e4 | 1878 | |
4002bf38 | 1879 | out: |
51a85faf BH |
1880 | if (!*return_value) |
1881 | *return_value = device; | |
805d410f | 1882 | |
51a85faf BH |
1883 | return AE_OK; |
1884 | } | |
3fb02738 | 1885 | |
c5698074 | 1886 | static int acpi_scan_attach_handler(struct acpi_device *device) |
ca589f94 | 1887 | { |
c5698074 RW |
1888 | struct acpi_hardware_id *hwid; |
1889 | int ret = 0; | |
ca589f94 | 1890 | |
c5698074 | 1891 | list_for_each_entry(hwid, &device->pnp.ids, list) { |
87b85b3c | 1892 | const struct acpi_device_id *devid; |
c5698074 | 1893 | struct acpi_scan_handler *handler; |
ca589f94 | 1894 | |
c5698074 RW |
1895 | handler = acpi_scan_match_handler(hwid->id, &devid); |
1896 | if (handler) { | |
87b85b3c RW |
1897 | ret = handler->attach(device, devid); |
1898 | if (ret > 0) { | |
1899 | device->handler = handler; | |
c5698074 | 1900 | break; |
87b85b3c | 1901 | } else if (ret < 0) { |
c5698074 | 1902 | break; |
87b85b3c | 1903 | } |
ca589f94 RW |
1904 | } |
1905 | } | |
1906 | return ret; | |
1907 | } | |
1908 | ||
0fc300b0 RW |
1909 | static acpi_status acpi_bus_device_attach(acpi_handle handle, u32 lvl_not_used, |
1910 | void *not_used, void **ret_not_used) | |
51a85faf | 1911 | { |
805d410f RW |
1912 | struct acpi_device *device; |
1913 | unsigned long long sta_not_used; | |
ca589f94 | 1914 | int ret; |
3fb02738 | 1915 | |
805d410f RW |
1916 | /* |
1917 | * Ignore errors ignored by acpi_bus_check_add() to avoid terminating | |
1918 | * namespace walks prematurely. | |
1919 | */ | |
ca589f94 | 1920 | if (acpi_bus_type_and_status(handle, &ret, &sta_not_used)) |
805d410f | 1921 | return AE_OK; |
1da177e4 | 1922 | |
805d410f RW |
1923 | if (acpi_bus_get_device(handle, &device)) |
1924 | return AE_CTRL_DEPTH; | |
7779688f | 1925 | |
ca589f94 RW |
1926 | ret = acpi_scan_attach_handler(device); |
1927 | if (ret) | |
1928 | return ret > 0 ? AE_OK : AE_CTRL_DEPTH; | |
1929 | ||
1930 | ret = device_attach(&device->dev); | |
1931 | return ret >= 0 ? AE_OK : AE_CTRL_DEPTH; | |
1da177e4 | 1932 | } |
1da177e4 | 1933 | |
636458de | 1934 | /** |
b8bd759a | 1935 | * acpi_bus_scan - Add ACPI device node objects in a given namespace scope. |
636458de | 1936 | * @handle: Root of the namespace scope to scan. |
7779688f | 1937 | * |
636458de RW |
1938 | * Scan a given ACPI tree (probably recently hot-plugged) and create and add |
1939 | * found devices. | |
7779688f | 1940 | * |
636458de RW |
1941 | * If no devices were found, -ENODEV is returned, but it does not mean that |
1942 | * there has been a real error. There just have been no suitable ACPI objects | |
1943 | * in the table trunk from which the kernel could create a device and add an | |
1944 | * appropriate driver. | |
3757b948 RW |
1945 | * |
1946 | * Must be called under acpi_scan_lock. | |
7779688f | 1947 | */ |
b8bd759a | 1948 | int acpi_bus_scan(acpi_handle handle) |
3fb02738 | 1949 | { |
b8bd759a | 1950 | void *device = NULL; |
c511cc19 | 1951 | int error = 0; |
3fb02738 | 1952 | |
b8bd759a RW |
1953 | if (ACPI_SUCCESS(acpi_bus_check_add(handle, 0, NULL, &device))) |
1954 | acpi_walk_namespace(ACPI_TYPE_ANY, handle, ACPI_UINT32_MAX, | |
1955 | acpi_bus_check_add, NULL, NULL, &device); | |
3fb02738 | 1956 | |
d2f6650a | 1957 | if (!device) |
c511cc19 RW |
1958 | error = -ENODEV; |
1959 | else if (ACPI_SUCCESS(acpi_bus_device_attach(handle, 0, NULL, NULL))) | |
b8bd759a RW |
1960 | acpi_walk_namespace(ACPI_TYPE_ANY, handle, ACPI_UINT32_MAX, |
1961 | acpi_bus_device_attach, NULL, NULL, NULL); | |
3fb02738 | 1962 | |
c511cc19 | 1963 | return error; |
3fb02738 | 1964 | } |
b8bd759a | 1965 | EXPORT_SYMBOL(acpi_bus_scan); |
a2100801 | 1966 | |
05404d8f RW |
1967 | static acpi_status acpi_bus_device_detach(acpi_handle handle, u32 lvl_not_used, |
1968 | void *not_used, void **ret_not_used) | |
1969 | { | |
1970 | struct acpi_device *device = NULL; | |
a2100801 | 1971 | |
05404d8f | 1972 | if (!acpi_bus_get_device(handle, &device)) { |
ca589f94 RW |
1973 | struct acpi_scan_handler *dev_handler = device->handler; |
1974 | ||
ca589f94 RW |
1975 | if (dev_handler) { |
1976 | if (dev_handler->detach) | |
1977 | dev_handler->detach(device); | |
1978 | ||
1979 | device->handler = NULL; | |
1980 | } else { | |
1981 | device_release_driver(&device->dev); | |
1982 | } | |
05404d8f RW |
1983 | } |
1984 | return AE_OK; | |
3fb02738 | 1985 | } |
1da177e4 | 1986 | |
05404d8f RW |
1987 | static acpi_status acpi_bus_remove(acpi_handle handle, u32 lvl_not_used, |
1988 | void *not_used, void **ret_not_used) | |
1da177e4 | 1989 | { |
05404d8f | 1990 | struct acpi_device *device = NULL; |
4be44fcd | 1991 | |
05404d8f RW |
1992 | if (!acpi_bus_get_device(handle, &device)) |
1993 | acpi_device_unregister(device); | |
1da177e4 | 1994 | |
05404d8f RW |
1995 | return AE_OK; |
1996 | } | |
1da177e4 | 1997 | |
3757b948 RW |
1998 | /** |
1999 | * acpi_bus_trim - Remove ACPI device node and all of its descendants | |
2000 | * @start: Root of the ACPI device nodes subtree to remove. | |
2001 | * | |
2002 | * Must be called under acpi_scan_lock. | |
2003 | */ | |
bfee26db | 2004 | void acpi_bus_trim(struct acpi_device *start) |
1da177e4 | 2005 | { |
05404d8f RW |
2006 | /* |
2007 | * Execute acpi_bus_device_detach() as a post-order callback to detach | |
2008 | * all ACPI drivers from the device nodes being removed. | |
2009 | */ | |
2010 | acpi_walk_namespace(ACPI_TYPE_ANY, start->handle, ACPI_UINT32_MAX, NULL, | |
2011 | acpi_bus_device_detach, NULL, NULL); | |
2012 | acpi_bus_device_detach(start->handle, 0, NULL, NULL); | |
cecdb193 RW |
2013 | /* |
2014 | * Execute acpi_bus_remove() as a post-order callback to remove device | |
2015 | * nodes in the given namespace scope. | |
2016 | */ | |
2017 | acpi_walk_namespace(ACPI_TYPE_ANY, start->handle, ACPI_UINT32_MAX, NULL, | |
2018 | acpi_bus_remove, NULL, NULL); | |
2019 | acpi_bus_remove(start->handle, 0, NULL, NULL); | |
1da177e4 | 2020 | } |
ceaba663 KA |
2021 | EXPORT_SYMBOL_GPL(acpi_bus_trim); |
2022 | ||
e8b945c9 | 2023 | static int acpi_bus_scan_fixed(void) |
1da177e4 | 2024 | { |
4be44fcd | 2025 | int result = 0; |
c4168bff | 2026 | |
1da177e4 LT |
2027 | /* |
2028 | * Enumerate all fixed-feature devices. | |
2029 | */ | |
2c0d4fe0 RW |
2030 | if (!(acpi_gbl_FADT.flags & ACPI_FADT_POWER_BUTTON)) { |
2031 | struct acpi_device *device = NULL; | |
2032 | ||
5c478f49 | 2033 | result = acpi_add_single_object(&device, NULL, |
c4168bff | 2034 | ACPI_BUS_TYPE_POWER_BUTTON, |
2c0d4fe0 RW |
2035 | ACPI_STA_DEFAULT); |
2036 | if (result) | |
2037 | return result; | |
2038 | ||
2039 | result = device_attach(&device->dev); | |
2040 | if (result < 0) | |
2041 | return result; | |
2042 | ||
c10d7a13 | 2043 | device_init_wakeup(&device->dev, true); |
3fb02738 | 2044 | } |
1da177e4 | 2045 | |
2c0d4fe0 RW |
2046 | if (!(acpi_gbl_FADT.flags & ACPI_FADT_SLEEP_BUTTON)) { |
2047 | struct acpi_device *device = NULL; | |
2048 | ||
5c478f49 | 2049 | result = acpi_add_single_object(&device, NULL, |
c4168bff | 2050 | ACPI_BUS_TYPE_SLEEP_BUTTON, |
2c0d4fe0 RW |
2051 | ACPI_STA_DEFAULT); |
2052 | if (result) | |
2053 | return result; | |
2054 | ||
2055 | result = device_attach(&device->dev); | |
3fb02738 | 2056 | } |
1da177e4 | 2057 | |
2c0d4fe0 | 2058 | return result < 0 ? result : 0; |
1da177e4 LT |
2059 | } |
2060 | ||
e747f274 | 2061 | int __init acpi_scan_init(void) |
1da177e4 LT |
2062 | { |
2063 | int result; | |
1da177e4 | 2064 | |
5b327265 PM |
2065 | result = bus_register(&acpi_bus_type); |
2066 | if (result) { | |
2067 | /* We don't want to quit even if we failed to add suspend/resume */ | |
2068 | printk(KERN_ERR PREFIX "Could not register bus type\n"); | |
2069 | } | |
2070 | ||
92ef2a25 | 2071 | acpi_pci_root_init(); |
4daeaf68 | 2072 | acpi_pci_link_init(); |
ac212b69 | 2073 | acpi_processor_init(); |
141a297b | 2074 | acpi_platform_init(); |
f58b082a | 2075 | acpi_lpss_init(); |
2fa97feb | 2076 | acpi_cmos_rtc_init(); |
737f1a9f | 2077 | acpi_container_init(); |
0a347644 | 2078 | acpi_memory_hotplug_init(); |
94add0f8 | 2079 | acpi_dock_init(); |
97d9a9e9 | 2080 | |
3757b948 | 2081 | mutex_lock(&acpi_scan_lock); |
1da177e4 LT |
2082 | /* |
2083 | * Enumerate devices in the ACPI namespace. | |
2084 | */ | |
0cd6ac52 RW |
2085 | result = acpi_bus_scan(ACPI_ROOT_OBJECT); |
2086 | if (result) | |
3757b948 | 2087 | goto out; |
1da177e4 | 2088 | |
0cd6ac52 | 2089 | result = acpi_bus_get_device(ACPI_ROOT_OBJECT, &acpi_root); |
1da177e4 | 2090 | if (result) |
3757b948 | 2091 | goto out; |
1da177e4 | 2092 | |
b8bd759a RW |
2093 | result = acpi_bus_scan_fixed(); |
2094 | if (result) { | |
b17b537a | 2095 | acpi_device_unregister(acpi_root); |
3757b948 | 2096 | goto out; |
b8bd759a | 2097 | } |
1da177e4 | 2098 | |
b8bd759a | 2099 | acpi_update_all_gpes(); |
3757b948 | 2100 | |
668192b6 YL |
2101 | acpi_pci_root_hp_init(); |
2102 | ||
3757b948 RW |
2103 | out: |
2104 | mutex_unlock(&acpi_scan_lock); | |
2105 | return result; | |
1da177e4 | 2106 | } |