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; | |
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 | ||
144 | ret = device_offline(pn->dev); | |
145 | if (acpi_force_hot_remove) | |
146 | continue; | |
147 | ||
148 | if (ret < 0) { | |
149 | status = AE_ERROR; | |
150 | break; | |
151 | } | |
152 | pn->put_online = !ret; | |
153 | } | |
154 | ||
155 | mutex_unlock(&device->physical_node_lock); | |
156 | ||
157 | return status; | |
158 | } | |
159 | ||
160 | static acpi_status acpi_bus_online_companions(acpi_handle handle, u32 lvl, | |
161 | void *data, void **ret_p) | |
162 | { | |
163 | struct acpi_device *device = NULL; | |
164 | struct acpi_device_physical_node *pn; | |
165 | ||
166 | if (acpi_bus_get_device(handle, &device)) | |
167 | return AE_OK; | |
168 | ||
169 | mutex_lock(&device->physical_node_lock); | |
170 | ||
171 | list_for_each_entry(pn, &device->physical_node_list, node) | |
172 | if (pn->put_online) { | |
173 | device_online(pn->dev); | |
174 | pn->put_online = false; | |
175 | } | |
176 | ||
177 | mutex_unlock(&device->physical_node_lock); | |
178 | ||
179 | return AE_OK; | |
180 | } | |
181 | ||
a33ec399 | 182 | static int acpi_scan_hot_remove(struct acpi_device *device) |
1da177e4 | 183 | { |
5993c467 | 184 | acpi_handle handle = device->handle; |
a33ec399 | 185 | acpi_handle not_used; |
1da177e4 LT |
186 | struct acpi_object_list arg_list; |
187 | union acpi_object arg; | |
a33ec399 | 188 | acpi_status status; |
882fd12e | 189 | unsigned long long sta; |
f058cdf4 | 190 | |
3757b948 | 191 | /* If there is no handle, the device node has been unregistered. */ |
a33ec399 | 192 | if (!handle) { |
3757b948 RW |
193 | dev_dbg(&device->dev, "ACPI handle missing\n"); |
194 | put_device(&device->dev); | |
a33ec399 | 195 | return -EINVAL; |
3757b948 RW |
196 | } |
197 | ||
683058e3 RW |
198 | lock_device_hotplug(); |
199 | ||
200 | status = acpi_walk_namespace(ACPI_TYPE_ANY, handle, ACPI_UINT32_MAX, | |
201 | NULL, acpi_bus_offline_companions, NULL, | |
202 | NULL); | |
203 | if (ACPI_SUCCESS(status) || acpi_force_hot_remove) | |
204 | status = acpi_bus_offline_companions(handle, 0, NULL, NULL); | |
205 | ||
206 | if (ACPI_FAILURE(status) && !acpi_force_hot_remove) { | |
207 | acpi_bus_online_companions(handle, 0, NULL, NULL); | |
208 | acpi_walk_namespace(ACPI_TYPE_ANY, handle, ACPI_UINT32_MAX, | |
209 | acpi_bus_online_companions, NULL, NULL, | |
210 | NULL); | |
211 | ||
212 | unlock_device_hotplug(); | |
213 | ||
214 | put_device(&device->dev); | |
215 | return -EBUSY; | |
216 | } | |
217 | ||
26d46867 | 218 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
0794469d | 219 | "Hot-removing device %s...\n", dev_name(&device->dev))); |
26d46867 | 220 | |
bfee26db | 221 | acpi_bus_trim(device); |
683058e3 RW |
222 | |
223 | unlock_device_hotplug(); | |
224 | ||
3757b948 RW |
225 | /* Device node has been unregistered. */ |
226 | put_device(&device->dev); | |
b3c450c3 TK |
227 | device = NULL; |
228 | ||
a33ec399 | 229 | if (ACPI_SUCCESS(acpi_get_handle(handle, "_LCK", ¬_used))) { |
1da177e4 LT |
230 | arg_list.count = 1; |
231 | arg_list.pointer = &arg; | |
232 | arg.type = ACPI_TYPE_INTEGER; | |
233 | arg.integer.value = 0; | |
234 | acpi_evaluate_object(handle, "_LCK", &arg_list, NULL); | |
235 | } | |
1da177e4 | 236 | |
1da177e4 LT |
237 | arg_list.count = 1; |
238 | arg_list.pointer = &arg; | |
239 | arg.type = ACPI_TYPE_INTEGER; | |
240 | arg.integer.value = 1; | |
1da177e4 | 241 | |
1da177e4 LT |
242 | /* |
243 | * TBD: _EJD support. | |
244 | */ | |
1da177e4 | 245 | status = acpi_evaluate_object(handle, "_EJ0", &arg_list, NULL); |
c4753e57 | 246 | if (ACPI_FAILURE(status)) { |
a33ec399 RW |
247 | if (status == AE_NOT_FOUND) { |
248 | return -ENODEV; | |
249 | } else { | |
882fd12e TK |
250 | acpi_handle_warn(handle, "Eject failed (0x%x)\n", |
251 | status); | |
a33ec399 RW |
252 | return -EIO; |
253 | } | |
254 | } | |
1da177e4 | 255 | |
882fd12e TK |
256 | /* |
257 | * Verify if eject was indeed successful. If not, log an error | |
258 | * message. No need to call _OST since _EJ0 call was made OK. | |
259 | */ | |
260 | status = acpi_evaluate_integer(handle, "_STA", NULL, &sta); | |
261 | if (ACPI_FAILURE(status)) { | |
262 | acpi_handle_warn(handle, | |
263 | "Status check after eject failed (0x%x)\n", status); | |
264 | } else if (sta & ACPI_STA_DEVICE_ENABLED) { | |
265 | acpi_handle_warn(handle, | |
266 | "Eject incomplete - status 0x%llx\n", sta); | |
267 | } | |
268 | ||
a33ec399 RW |
269 | return 0; |
270 | } | |
1da177e4 | 271 | |
a33ec399 RW |
272 | static void acpi_bus_device_eject(void *context) |
273 | { | |
274 | acpi_handle handle = context; | |
275 | struct acpi_device *device = NULL; | |
276 | struct acpi_scan_handler *handler; | |
277 | u32 ost_code = ACPI_OST_SC_NON_SPECIFIC_FAILURE; | |
278 | ||
279 | mutex_lock(&acpi_scan_lock); | |
280 | ||
281 | acpi_bus_get_device(handle, &device); | |
282 | if (!device) | |
283 | goto err_out; | |
284 | ||
285 | handler = device->handler; | |
286 | if (!handler || !handler->hotplug.enabled) { | |
287 | ost_code = ACPI_OST_SC_EJECT_NOT_SUPPORTED; | |
288 | goto err_out; | |
289 | } | |
290 | acpi_evaluate_hotplug_ost(handle, ACPI_NOTIFY_EJECT_REQUEST, | |
291 | ACPI_OST_SC_EJECT_IN_PROGRESS, NULL); | |
292 | if (handler->hotplug.mode == AHM_CONTAINER) { | |
293 | device->flags.eject_pending = true; | |
294 | kobject_uevent(&device->dev.kobj, KOBJ_OFFLINE); | |
295 | } else { | |
296 | int error; | |
297 | ||
298 | get_device(&device->dev); | |
299 | error = acpi_scan_hot_remove(device); | |
300 | if (error) | |
301 | goto err_out; | |
f058cdf4 | 302 | } |
1da177e4 | 303 | |
3757b948 | 304 | out: |
f058cdf4 | 305 | mutex_unlock(&acpi_scan_lock); |
c8d72a5e | 306 | return; |
a33ec399 RW |
307 | |
308 | err_out: | |
309 | acpi_evaluate_hotplug_ost(handle, ACPI_NOTIFY_EJECT_REQUEST, ost_code, | |
310 | NULL); | |
311 | goto out; | |
312 | } | |
313 | ||
314 | static void acpi_scan_bus_device_check(acpi_handle handle, u32 ost_source) | |
315 | { | |
316 | struct acpi_device *device = NULL; | |
317 | u32 ost_code = ACPI_OST_SC_NON_SPECIFIC_FAILURE; | |
318 | int error; | |
319 | ||
320 | mutex_lock(&acpi_scan_lock); | |
683058e3 | 321 | lock_device_hotplug(); |
a33ec399 RW |
322 | |
323 | acpi_bus_get_device(handle, &device); | |
324 | if (device) { | |
325 | dev_warn(&device->dev, "Attempt to re-insert\n"); | |
326 | goto out; | |
327 | } | |
328 | acpi_evaluate_hotplug_ost(handle, ost_source, | |
329 | ACPI_OST_SC_INSERT_IN_PROGRESS, NULL); | |
330 | error = acpi_bus_scan(handle); | |
331 | if (error) { | |
332 | acpi_handle_warn(handle, "Namespace scan failure\n"); | |
333 | goto out; | |
334 | } | |
335 | error = acpi_bus_get_device(handle, &device); | |
336 | if (error) { | |
337 | acpi_handle_warn(handle, "Missing device node object\n"); | |
338 | goto out; | |
339 | } | |
340 | ost_code = ACPI_OST_SC_SUCCESS; | |
341 | if (device->handler && device->handler->hotplug.mode == AHM_CONTAINER) | |
342 | kobject_uevent(&device->dev.kobj, KOBJ_ONLINE); | |
343 | ||
344 | out: | |
683058e3 | 345 | unlock_device_hotplug(); |
a33ec399 RW |
346 | acpi_evaluate_hotplug_ost(handle, ost_source, ost_code, NULL); |
347 | mutex_unlock(&acpi_scan_lock); | |
348 | } | |
349 | ||
350 | static void acpi_scan_bus_check(void *context) | |
351 | { | |
352 | acpi_scan_bus_device_check((acpi_handle)context, | |
353 | ACPI_NOTIFY_BUS_CHECK); | |
354 | } | |
355 | ||
356 | static void acpi_scan_device_check(void *context) | |
357 | { | |
358 | acpi_scan_bus_device_check((acpi_handle)context, | |
359 | ACPI_NOTIFY_DEVICE_CHECK); | |
360 | } | |
361 | ||
2cbb14fb TK |
362 | static void acpi_hotplug_unsupported(acpi_handle handle, u32 type) |
363 | { | |
364 | u32 ost_status; | |
365 | ||
366 | switch (type) { | |
367 | case ACPI_NOTIFY_BUS_CHECK: | |
368 | acpi_handle_debug(handle, | |
369 | "ACPI_NOTIFY_BUS_CHECK event: unsupported\n"); | |
370 | ost_status = ACPI_OST_SC_INSERT_NOT_SUPPORTED; | |
371 | break; | |
372 | case ACPI_NOTIFY_DEVICE_CHECK: | |
373 | acpi_handle_debug(handle, | |
374 | "ACPI_NOTIFY_DEVICE_CHECK event: unsupported\n"); | |
375 | ost_status = ACPI_OST_SC_INSERT_NOT_SUPPORTED; | |
376 | break; | |
377 | case ACPI_NOTIFY_EJECT_REQUEST: | |
378 | acpi_handle_debug(handle, | |
379 | "ACPI_NOTIFY_EJECT_REQUEST event: unsupported\n"); | |
380 | ost_status = ACPI_OST_SC_EJECT_NOT_SUPPORTED; | |
381 | break; | |
382 | default: | |
383 | /* non-hotplug event; possibly handled by other handler */ | |
384 | return; | |
385 | } | |
386 | ||
387 | acpi_evaluate_hotplug_ost(handle, type, ost_status, NULL); | |
388 | } | |
389 | ||
390 | static void acpi_hotplug_notify_cb(acpi_handle handle, u32 type, void *data) | |
a33ec399 RW |
391 | { |
392 | acpi_osd_exec_callback callback; | |
2cbb14fb | 393 | struct acpi_scan_handler *handler = data; |
a33ec399 RW |
394 | acpi_status status; |
395 | ||
2cbb14fb TK |
396 | if (!handler->hotplug.enabled) |
397 | return acpi_hotplug_unsupported(handle, type); | |
398 | ||
a33ec399 RW |
399 | switch (type) { |
400 | case ACPI_NOTIFY_BUS_CHECK: | |
401 | acpi_handle_debug(handle, "ACPI_NOTIFY_BUS_CHECK event\n"); | |
402 | callback = acpi_scan_bus_check; | |
403 | break; | |
404 | case ACPI_NOTIFY_DEVICE_CHECK: | |
405 | acpi_handle_debug(handle, "ACPI_NOTIFY_DEVICE_CHECK event\n"); | |
406 | callback = acpi_scan_device_check; | |
407 | break; | |
408 | case ACPI_NOTIFY_EJECT_REQUEST: | |
409 | acpi_handle_debug(handle, "ACPI_NOTIFY_EJECT_REQUEST event\n"); | |
410 | callback = acpi_bus_device_eject; | |
411 | break; | |
412 | default: | |
413 | /* non-hotplug event; possibly handled by other handler */ | |
414 | return; | |
415 | } | |
416 | status = acpi_os_hotplug_execute(callback, handle); | |
417 | if (ACPI_FAILURE(status)) | |
418 | acpi_evaluate_hotplug_ost(handle, type, | |
419 | ACPI_OST_SC_NON_SPECIFIC_FAILURE, | |
420 | NULL); | |
421 | } | |
422 | ||
423 | /** | |
424 | * acpi_bus_hot_remove_device: hot-remove a device and its children | |
425 | * @context: struct acpi_eject_event pointer (freed in this func) | |
426 | * | |
427 | * Hot-remove a device and its children. This function frees up the | |
428 | * memory space passed by arg context, so that the caller may call | |
429 | * this function asynchronously through acpi_os_hotplug_execute(). | |
430 | */ | |
431 | void acpi_bus_hot_remove_device(void *context) | |
432 | { | |
433 | struct acpi_eject_event *ej_event = context; | |
434 | struct acpi_device *device = ej_event->device; | |
435 | acpi_handle handle = device->handle; | |
436 | int error; | |
437 | ||
438 | mutex_lock(&acpi_scan_lock); | |
439 | ||
440 | error = acpi_scan_hot_remove(device); | |
441 | if (error && handle) | |
442 | acpi_evaluate_hotplug_ost(handle, ej_event->event, | |
443 | ACPI_OST_SC_NON_SPECIFIC_FAILURE, | |
444 | NULL); | |
445 | ||
446 | mutex_unlock(&acpi_scan_lock); | |
447 | kfree(context); | |
1da177e4 | 448 | } |
61622acc | 449 | EXPORT_SYMBOL(acpi_bus_hot_remove_device); |
1da177e4 | 450 | |
836aedb1 RW |
451 | static ssize_t real_power_state_show(struct device *dev, |
452 | struct device_attribute *attr, char *buf) | |
453 | { | |
454 | struct acpi_device *adev = to_acpi_device(dev); | |
455 | int state; | |
456 | int ret; | |
457 | ||
458 | ret = acpi_device_get_power(adev, &state); | |
459 | if (ret) | |
460 | return ret; | |
461 | ||
462 | return sprintf(buf, "%s\n", acpi_power_state_string(state)); | |
463 | } | |
464 | ||
465 | static DEVICE_ATTR(real_power_state, 0444, real_power_state_show, NULL); | |
466 | ||
467 | static ssize_t power_state_show(struct device *dev, | |
468 | struct device_attribute *attr, char *buf) | |
469 | { | |
470 | struct acpi_device *adev = to_acpi_device(dev); | |
471 | ||
472 | return sprintf(buf, "%s\n", acpi_power_state_string(adev->power.state)); | |
473 | } | |
474 | ||
475 | static DEVICE_ATTR(power_state, 0444, power_state_show, NULL); | |
476 | ||
1da177e4 | 477 | static ssize_t |
f883d9db PM |
478 | acpi_eject_store(struct device *d, struct device_attribute *attr, |
479 | const char *buf, size_t count) | |
1da177e4 | 480 | { |
f883d9db | 481 | struct acpi_device *acpi_device = to_acpi_device(d); |
c4753e57 | 482 | struct acpi_eject_event *ej_event; |
a33ec399 RW |
483 | acpi_object_type not_used; |
484 | acpi_status status; | |
485 | u32 ost_source; | |
486 | int ret; | |
1da177e4 | 487 | |
a33ec399 | 488 | if (!count || buf[0] != '1') |
1da177e4 | 489 | return -EINVAL; |
1da177e4 | 490 | |
a33ec399 RW |
491 | if ((!acpi_device->handler || !acpi_device->handler->hotplug.enabled) |
492 | && !acpi_device->driver) | |
493 | return -ENODEV; | |
494 | ||
495 | status = acpi_get_type(acpi_device->handle, ¬_used); | |
496 | if (ACPI_FAILURE(status) || !acpi_device->flags.ejectable) | |
497 | return -ENODEV; | |
498 | ||
499 | mutex_lock(&acpi_scan_lock); | |
c4753e57 | 500 | |
c4753e57 | 501 | if (acpi_device->flags.eject_pending) { |
a33ec399 RW |
502 | /* ACPI eject notification event. */ |
503 | ost_source = ACPI_NOTIFY_EJECT_REQUEST; | |
c4753e57 TK |
504 | acpi_device->flags.eject_pending = 0; |
505 | } else { | |
a33ec399 RW |
506 | /* Eject initiated by user space. */ |
507 | ost_source = ACPI_OST_EC_OSPM_EJECT; | |
c4753e57 | 508 | } |
a33ec399 RW |
509 | ej_event = kmalloc(sizeof(*ej_event), GFP_KERNEL); |
510 | if (!ej_event) { | |
511 | ret = -ENOMEM; | |
512 | goto err_out; | |
513 | } | |
514 | acpi_evaluate_hotplug_ost(acpi_device->handle, ost_source, | |
515 | ACPI_OST_SC_EJECT_IN_PROGRESS, NULL); | |
516 | ej_event->device = acpi_device; | |
517 | ej_event->event = ost_source; | |
518 | get_device(&acpi_device->dev); | |
3757b948 RW |
519 | status = acpi_os_hotplug_execute(acpi_bus_hot_remove_device, ej_event); |
520 | if (ACPI_FAILURE(status)) { | |
521 | put_device(&acpi_device->dev); | |
522 | kfree(ej_event); | |
a33ec399 RW |
523 | ret = status == AE_NO_MEMORY ? -ENOMEM : -EAGAIN; |
524 | goto err_out; | |
3757b948 | 525 | } |
a33ec399 RW |
526 | ret = count; |
527 | ||
528 | out: | |
529 | mutex_unlock(&acpi_scan_lock); | |
1da177e4 | 530 | return ret; |
a33ec399 RW |
531 | |
532 | err_out: | |
533 | acpi_evaluate_hotplug_ost(acpi_device->handle, ost_source, | |
534 | ACPI_OST_SC_NON_SPECIFIC_FAILURE, NULL); | |
535 | goto out; | |
1da177e4 LT |
536 | } |
537 | ||
f883d9db | 538 | static DEVICE_ATTR(eject, 0200, NULL, acpi_eject_store); |
1da177e4 | 539 | |
e49bd2dd ZR |
540 | static ssize_t |
541 | acpi_device_hid_show(struct device *dev, struct device_attribute *attr, char *buf) { | |
542 | struct acpi_device *acpi_dev = to_acpi_device(dev); | |
1da177e4 | 543 | |
ea8d82fd | 544 | return sprintf(buf, "%s\n", acpi_device_hid(acpi_dev)); |
1da177e4 | 545 | } |
e49bd2dd | 546 | static DEVICE_ATTR(hid, 0444, acpi_device_hid_show, NULL); |
1da177e4 | 547 | |
923d4a45 LZ |
548 | static ssize_t acpi_device_uid_show(struct device *dev, |
549 | struct device_attribute *attr, char *buf) | |
550 | { | |
551 | struct acpi_device *acpi_dev = to_acpi_device(dev); | |
552 | ||
553 | return sprintf(buf, "%s\n", acpi_dev->pnp.unique_id); | |
554 | } | |
555 | static DEVICE_ATTR(uid, 0444, acpi_device_uid_show, NULL); | |
556 | ||
557 | static ssize_t acpi_device_adr_show(struct device *dev, | |
558 | struct device_attribute *attr, char *buf) | |
559 | { | |
560 | struct acpi_device *acpi_dev = to_acpi_device(dev); | |
561 | ||
562 | return sprintf(buf, "0x%08x\n", | |
563 | (unsigned int)(acpi_dev->pnp.bus_address)); | |
564 | } | |
565 | static DEVICE_ATTR(adr, 0444, acpi_device_adr_show, NULL); | |
566 | ||
e49bd2dd ZR |
567 | static ssize_t |
568 | acpi_device_path_show(struct device *dev, struct device_attribute *attr, char *buf) { | |
569 | struct acpi_device *acpi_dev = to_acpi_device(dev); | |
570 | struct acpi_buffer path = {ACPI_ALLOCATE_BUFFER, NULL}; | |
571 | int result; | |
1da177e4 | 572 | |
e49bd2dd | 573 | result = acpi_get_name(acpi_dev->handle, ACPI_FULL_PATHNAME, &path); |
0c526d96 | 574 | if (result) |
e49bd2dd | 575 | goto end; |
1da177e4 | 576 | |
e49bd2dd ZR |
577 | result = sprintf(buf, "%s\n", (char*)path.pointer); |
578 | kfree(path.pointer); | |
0c526d96 | 579 | end: |
e49bd2dd | 580 | return result; |
1da177e4 | 581 | } |
e49bd2dd | 582 | static DEVICE_ATTR(path, 0444, acpi_device_path_show, NULL); |
1da177e4 | 583 | |
d1efe3c3 LO |
584 | /* sysfs file that shows description text from the ACPI _STR method */ |
585 | static ssize_t description_show(struct device *dev, | |
586 | struct device_attribute *attr, | |
587 | char *buf) { | |
588 | struct acpi_device *acpi_dev = to_acpi_device(dev); | |
589 | int result; | |
590 | ||
591 | if (acpi_dev->pnp.str_obj == NULL) | |
592 | return 0; | |
593 | ||
594 | /* | |
595 | * The _STR object contains a Unicode identifier for a device. | |
596 | * We need to convert to utf-8 so it can be displayed. | |
597 | */ | |
598 | result = utf16s_to_utf8s( | |
599 | (wchar_t *)acpi_dev->pnp.str_obj->buffer.pointer, | |
600 | acpi_dev->pnp.str_obj->buffer.length, | |
601 | UTF16_LITTLE_ENDIAN, buf, | |
602 | PAGE_SIZE); | |
603 | ||
604 | buf[result++] = '\n'; | |
605 | ||
606 | return result; | |
607 | } | |
608 | static DEVICE_ATTR(description, 0444, description_show, NULL); | |
609 | ||
bb74ac23 YI |
610 | static ssize_t |
611 | acpi_device_sun_show(struct device *dev, struct device_attribute *attr, | |
612 | char *buf) { | |
613 | struct acpi_device *acpi_dev = to_acpi_device(dev); | |
614 | ||
615 | return sprintf(buf, "%lu\n", acpi_dev->pnp.sun); | |
616 | } | |
617 | static DEVICE_ATTR(sun, 0444, acpi_device_sun_show, NULL); | |
618 | ||
e49bd2dd | 619 | static int acpi_device_setup_files(struct acpi_device *dev) |
1da177e4 | 620 | { |
d1efe3c3 | 621 | struct acpi_buffer buffer = {ACPI_ALLOCATE_BUFFER, NULL}; |
f883d9db PM |
622 | acpi_status status; |
623 | acpi_handle temp; | |
bb74ac23 | 624 | unsigned long long sun; |
e49bd2dd | 625 | int result = 0; |
1da177e4 LT |
626 | |
627 | /* | |
e49bd2dd | 628 | * Devices gotten from FADT don't have a "path" attribute |
1da177e4 | 629 | */ |
0c526d96 | 630 | if (dev->handle) { |
e49bd2dd | 631 | result = device_create_file(&dev->dev, &dev_attr_path); |
0c526d96 | 632 | if (result) |
e49bd2dd | 633 | goto end; |
1da177e4 LT |
634 | } |
635 | ||
2b2ae7c7 TR |
636 | if (!list_empty(&dev->pnp.ids)) { |
637 | result = device_create_file(&dev->dev, &dev_attr_hid); | |
638 | if (result) | |
639 | goto end; | |
1da177e4 | 640 | |
2b2ae7c7 TR |
641 | result = device_create_file(&dev->dev, &dev_attr_modalias); |
642 | if (result) | |
643 | goto end; | |
644 | } | |
29b71a1c | 645 | |
d1efe3c3 LO |
646 | /* |
647 | * If device has _STR, 'description' file is created | |
648 | */ | |
649 | status = acpi_get_handle(dev->handle, "_STR", &temp); | |
650 | if (ACPI_SUCCESS(status)) { | |
651 | status = acpi_evaluate_object(dev->handle, "_STR", | |
652 | NULL, &buffer); | |
653 | if (ACPI_FAILURE(status)) | |
654 | buffer.pointer = NULL; | |
655 | dev->pnp.str_obj = buffer.pointer; | |
656 | result = device_create_file(&dev->dev, &dev_attr_description); | |
657 | if (result) | |
658 | goto end; | |
659 | } | |
660 | ||
d4e1a692 | 661 | if (dev->pnp.type.bus_address) |
923d4a45 LZ |
662 | result = device_create_file(&dev->dev, &dev_attr_adr); |
663 | if (dev->pnp.unique_id) | |
664 | result = device_create_file(&dev->dev, &dev_attr_uid); | |
665 | ||
bb74ac23 YI |
666 | status = acpi_evaluate_integer(dev->handle, "_SUN", NULL, &sun); |
667 | if (ACPI_SUCCESS(status)) { | |
668 | dev->pnp.sun = (unsigned long)sun; | |
669 | result = device_create_file(&dev->dev, &dev_attr_sun); | |
670 | if (result) | |
671 | goto end; | |
672 | } else { | |
673 | dev->pnp.sun = (unsigned long)-1; | |
674 | } | |
675 | ||
e49bd2dd ZR |
676 | /* |
677 | * If device has _EJ0, 'eject' file is created that is used to trigger | |
678 | * hot-removal function from userland. | |
679 | */ | |
f883d9db | 680 | status = acpi_get_handle(dev->handle, "_EJ0", &temp); |
836aedb1 | 681 | if (ACPI_SUCCESS(status)) { |
e49bd2dd | 682 | result = device_create_file(&dev->dev, &dev_attr_eject); |
836aedb1 RW |
683 | if (result) |
684 | return result; | |
685 | } | |
686 | ||
687 | if (dev->flags.power_manageable) { | |
688 | result = device_create_file(&dev->dev, &dev_attr_power_state); | |
689 | if (result) | |
690 | return result; | |
691 | ||
692 | if (dev->power.flags.power_resources) | |
693 | result = device_create_file(&dev->dev, | |
694 | &dev_attr_real_power_state); | |
695 | } | |
696 | ||
0c526d96 | 697 | end: |
e49bd2dd | 698 | return result; |
1da177e4 LT |
699 | } |
700 | ||
f883d9db | 701 | static void acpi_device_remove_files(struct acpi_device *dev) |
1da177e4 | 702 | { |
f883d9db PM |
703 | acpi_status status; |
704 | acpi_handle temp; | |
1da177e4 | 705 | |
836aedb1 RW |
706 | if (dev->flags.power_manageable) { |
707 | device_remove_file(&dev->dev, &dev_attr_power_state); | |
708 | if (dev->power.flags.power_resources) | |
709 | device_remove_file(&dev->dev, | |
710 | &dev_attr_real_power_state); | |
711 | } | |
712 | ||
f883d9db | 713 | /* |
d1efe3c3 LO |
714 | * If device has _STR, remove 'description' file |
715 | */ | |
716 | status = acpi_get_handle(dev->handle, "_STR", &temp); | |
717 | if (ACPI_SUCCESS(status)) { | |
718 | kfree(dev->pnp.str_obj); | |
719 | device_remove_file(&dev->dev, &dev_attr_description); | |
720 | } | |
721 | /* | |
722 | * If device has _EJ0, remove 'eject' file. | |
f883d9db PM |
723 | */ |
724 | status = acpi_get_handle(dev->handle, "_EJ0", &temp); | |
725 | if (ACPI_SUCCESS(status)) | |
726 | device_remove_file(&dev->dev, &dev_attr_eject); | |
1da177e4 | 727 | |
bb74ac23 YI |
728 | status = acpi_get_handle(dev->handle, "_SUN", &temp); |
729 | if (ACPI_SUCCESS(status)) | |
730 | device_remove_file(&dev->dev, &dev_attr_sun); | |
731 | ||
923d4a45 LZ |
732 | if (dev->pnp.unique_id) |
733 | device_remove_file(&dev->dev, &dev_attr_uid); | |
d4e1a692 | 734 | if (dev->pnp.type.bus_address) |
923d4a45 | 735 | device_remove_file(&dev->dev, &dev_attr_adr); |
1131b938 BH |
736 | device_remove_file(&dev->dev, &dev_attr_modalias); |
737 | device_remove_file(&dev->dev, &dev_attr_hid); | |
0c526d96 | 738 | if (dev->handle) |
e49bd2dd | 739 | device_remove_file(&dev->dev, &dev_attr_path); |
1da177e4 | 740 | } |
1da177e4 | 741 | /* -------------------------------------------------------------------------- |
9e89dde2 | 742 | ACPI Bus operations |
1da177e4 | 743 | -------------------------------------------------------------------------- */ |
29b71a1c | 744 | |
cf761af9 MW |
745 | static const struct acpi_device_id *__acpi_match_device( |
746 | struct acpi_device *device, const struct acpi_device_id *ids) | |
29b71a1c TR |
747 | { |
748 | const struct acpi_device_id *id; | |
7f47fa6c | 749 | struct acpi_hardware_id *hwid; |
29b71a1c | 750 | |
39a0ad87 ZY |
751 | /* |
752 | * If the device is not present, it is unnecessary to load device | |
753 | * driver for it. | |
754 | */ | |
755 | if (!device->status.present) | |
cf761af9 | 756 | return NULL; |
39a0ad87 | 757 | |
7f47fa6c BH |
758 | for (id = ids; id->id[0]; id++) |
759 | list_for_each_entry(hwid, &device->pnp.ids, list) | |
760 | if (!strcmp((char *) id->id, hwid->id)) | |
cf761af9 MW |
761 | return id; |
762 | ||
763 | return NULL; | |
764 | } | |
765 | ||
766 | /** | |
767 | * acpi_match_device - Match a struct device against a given list of ACPI IDs | |
768 | * @ids: Array of struct acpi_device_id object to match against. | |
769 | * @dev: The device structure to match. | |
770 | * | |
771 | * Check if @dev has a valid ACPI handle and if there is a struct acpi_device | |
772 | * object for that handle and use that object to match against a given list of | |
773 | * device IDs. | |
774 | * | |
775 | * Return a pointer to the first matching ID on success or %NULL on failure. | |
776 | */ | |
777 | const struct acpi_device_id *acpi_match_device(const struct acpi_device_id *ids, | |
778 | const struct device *dev) | |
779 | { | |
780 | struct acpi_device *adev; | |
0613e1f7 | 781 | acpi_handle handle = ACPI_HANDLE(dev); |
cf761af9 | 782 | |
0613e1f7 | 783 | if (!ids || !handle || acpi_bus_get_device(handle, &adev)) |
cf761af9 MW |
784 | return NULL; |
785 | ||
786 | return __acpi_match_device(adev, ids); | |
787 | } | |
788 | EXPORT_SYMBOL_GPL(acpi_match_device); | |
29b71a1c | 789 | |
cf761af9 MW |
790 | int acpi_match_device_ids(struct acpi_device *device, |
791 | const struct acpi_device_id *ids) | |
792 | { | |
793 | return __acpi_match_device(device, ids) ? 0 : -ENOENT; | |
29b71a1c TR |
794 | } |
795 | EXPORT_SYMBOL(acpi_match_device_ids); | |
796 | ||
0b224527 RW |
797 | static void acpi_free_power_resources_lists(struct acpi_device *device) |
798 | { | |
799 | int i; | |
800 | ||
993cbe59 RW |
801 | if (device->wakeup.flags.valid) |
802 | acpi_power_resources_list_free(&device->wakeup.resources); | |
803 | ||
0b224527 RW |
804 | if (!device->flags.power_manageable) |
805 | return; | |
806 | ||
807 | for (i = ACPI_STATE_D0; i <= ACPI_STATE_D3_HOT; i++) { | |
808 | struct acpi_device_power_state *ps = &device->power.states[i]; | |
809 | acpi_power_resources_list_free(&ps->resources); | |
810 | } | |
7f47fa6c BH |
811 | } |
812 | ||
1890a97a | 813 | static void acpi_device_release(struct device *dev) |
1da177e4 | 814 | { |
1890a97a | 815 | struct acpi_device *acpi_dev = to_acpi_device(dev); |
1da177e4 | 816 | |
c0af4175 | 817 | acpi_free_pnp_ids(&acpi_dev->pnp); |
0b224527 | 818 | acpi_free_power_resources_lists(acpi_dev); |
1890a97a | 819 | kfree(acpi_dev); |
1da177e4 LT |
820 | } |
821 | ||
5d9464a4 | 822 | static int acpi_bus_match(struct device *dev, struct device_driver *drv) |
9e89dde2 | 823 | { |
5d9464a4 PM |
824 | struct acpi_device *acpi_dev = to_acpi_device(dev); |
825 | struct acpi_driver *acpi_drv = to_acpi_driver(drv); | |
1da177e4 | 826 | |
209d3b17 | 827 | return acpi_dev->flags.match_driver |
805d410f | 828 | && !acpi_match_device_ids(acpi_dev, acpi_drv->ids); |
5d9464a4 | 829 | } |
1da177e4 | 830 | |
7eff2e7a | 831 | static int acpi_device_uevent(struct device *dev, struct kobj_uevent_env *env) |
1da177e4 | 832 | { |
5d9464a4 | 833 | struct acpi_device *acpi_dev = to_acpi_device(dev); |
7eff2e7a | 834 | int len; |
5d9464a4 | 835 | |
2b2ae7c7 TR |
836 | if (list_empty(&acpi_dev->pnp.ids)) |
837 | return 0; | |
838 | ||
7eff2e7a KS |
839 | if (add_uevent_var(env, "MODALIAS=")) |
840 | return -ENOMEM; | |
841 | len = create_modalias(acpi_dev, &env->buf[env->buflen - 1], | |
842 | sizeof(env->buf) - env->buflen); | |
843 | if (len >= (sizeof(env->buf) - env->buflen)) | |
844 | return -ENOMEM; | |
845 | env->buflen += len; | |
9e89dde2 | 846 | return 0; |
1da177e4 LT |
847 | } |
848 | ||
46ec8598 BH |
849 | static void acpi_device_notify(acpi_handle handle, u32 event, void *data) |
850 | { | |
851 | struct acpi_device *device = data; | |
852 | ||
853 | device->driver->ops.notify(device, event); | |
854 | } | |
855 | ||
856 | static acpi_status acpi_device_notify_fixed(void *data) | |
857 | { | |
858 | struct acpi_device *device = data; | |
859 | ||
53de5356 BH |
860 | /* Fixed hardware devices have no handles */ |
861 | acpi_device_notify(NULL, ACPI_FIXED_HARDWARE_EVENT, device); | |
46ec8598 BH |
862 | return AE_OK; |
863 | } | |
864 | ||
865 | static int acpi_device_install_notify_handler(struct acpi_device *device) | |
866 | { | |
867 | acpi_status status; | |
46ec8598 | 868 | |
ccba2a36 | 869 | if (device->device_type == ACPI_BUS_TYPE_POWER_BUTTON) |
46ec8598 BH |
870 | status = |
871 | acpi_install_fixed_event_handler(ACPI_EVENT_POWER_BUTTON, | |
872 | acpi_device_notify_fixed, | |
873 | device); | |
ccba2a36 | 874 | else if (device->device_type == ACPI_BUS_TYPE_SLEEP_BUTTON) |
46ec8598 BH |
875 | status = |
876 | acpi_install_fixed_event_handler(ACPI_EVENT_SLEEP_BUTTON, | |
877 | acpi_device_notify_fixed, | |
878 | device); | |
879 | else | |
880 | status = acpi_install_notify_handler(device->handle, | |
881 | ACPI_DEVICE_NOTIFY, | |
882 | acpi_device_notify, | |
883 | device); | |
884 | ||
885 | if (ACPI_FAILURE(status)) | |
886 | return -EINVAL; | |
887 | return 0; | |
888 | } | |
889 | ||
890 | static void acpi_device_remove_notify_handler(struct acpi_device *device) | |
891 | { | |
ccba2a36 | 892 | if (device->device_type == ACPI_BUS_TYPE_POWER_BUTTON) |
46ec8598 BH |
893 | acpi_remove_fixed_event_handler(ACPI_EVENT_POWER_BUTTON, |
894 | acpi_device_notify_fixed); | |
ccba2a36 | 895 | else if (device->device_type == ACPI_BUS_TYPE_SLEEP_BUTTON) |
46ec8598 BH |
896 | acpi_remove_fixed_event_handler(ACPI_EVENT_SLEEP_BUTTON, |
897 | acpi_device_notify_fixed); | |
898 | else | |
899 | acpi_remove_notify_handler(device->handle, ACPI_DEVICE_NOTIFY, | |
900 | acpi_device_notify); | |
901 | } | |
902 | ||
5d9464a4 | 903 | static int acpi_bus_driver_init(struct acpi_device *, struct acpi_driver *); |
5d9464a4 | 904 | static int acpi_device_probe(struct device * dev) |
1da177e4 | 905 | { |
5d9464a4 PM |
906 | struct acpi_device *acpi_dev = to_acpi_device(dev); |
907 | struct acpi_driver *acpi_drv = to_acpi_driver(dev->driver); | |
908 | int ret; | |
909 | ||
910 | ret = acpi_bus_driver_init(acpi_dev, acpi_drv); | |
911 | if (!ret) { | |
46ec8598 BH |
912 | if (acpi_drv->ops.notify) { |
913 | ret = acpi_device_install_notify_handler(acpi_dev); | |
914 | if (ret) { | |
46ec8598 | 915 | if (acpi_drv->ops.remove) |
51fac838 | 916 | acpi_drv->ops.remove(acpi_dev); |
5f27ee8e TK |
917 | acpi_dev->driver = NULL; |
918 | acpi_dev->driver_data = NULL; | |
46ec8598 BH |
919 | return ret; |
920 | } | |
921 | } | |
922 | ||
5d9464a4 PM |
923 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
924 | "Found driver [%s] for device [%s]\n", | |
925 | acpi_drv->name, acpi_dev->pnp.bus_id)); | |
926 | get_device(dev); | |
927 | } | |
928 | return ret; | |
929 | } | |
1da177e4 | 930 | |
5d9464a4 PM |
931 | static int acpi_device_remove(struct device * dev) |
932 | { | |
933 | struct acpi_device *acpi_dev = to_acpi_device(dev); | |
934 | struct acpi_driver *acpi_drv = acpi_dev->driver; | |
935 | ||
936 | if (acpi_drv) { | |
46ec8598 BH |
937 | if (acpi_drv->ops.notify) |
938 | acpi_device_remove_notify_handler(acpi_dev); | |
5d9464a4 | 939 | if (acpi_drv->ops.remove) |
51fac838 | 940 | acpi_drv->ops.remove(acpi_dev); |
1da177e4 | 941 | } |
5d9464a4 | 942 | acpi_dev->driver = NULL; |
db89b4f0 | 943 | acpi_dev->driver_data = NULL; |
1da177e4 | 944 | |
5d9464a4 | 945 | put_device(dev); |
9e89dde2 ZR |
946 | return 0; |
947 | } | |
1da177e4 | 948 | |
55955aad | 949 | struct bus_type acpi_bus_type = { |
9e89dde2 | 950 | .name = "acpi", |
5d9464a4 PM |
951 | .match = acpi_bus_match, |
952 | .probe = acpi_device_probe, | |
953 | .remove = acpi_device_remove, | |
954 | .uevent = acpi_device_uevent, | |
9e89dde2 ZR |
955 | }; |
956 | ||
cf860be6 RW |
957 | int acpi_device_add(struct acpi_device *device, |
958 | void (*release)(struct device *)) | |
1da177e4 | 959 | { |
4be44fcd | 960 | int result; |
e49bd2dd ZR |
961 | struct acpi_device_bus_id *acpi_device_bus_id, *new_bus_id; |
962 | int found = 0; | |
66b7ed40 | 963 | |
d43e167d RW |
964 | if (device->handle) { |
965 | acpi_status status; | |
966 | ||
967 | status = acpi_attach_data(device->handle, acpi_bus_data_handler, | |
968 | device); | |
969 | if (ACPI_FAILURE(status)) { | |
970 | acpi_handle_err(device->handle, | |
971 | "Unable to attach device data\n"); | |
972 | return -ENODEV; | |
973 | } | |
974 | } | |
975 | ||
9e89dde2 ZR |
976 | /* |
977 | * Linkage | |
978 | * ------- | |
979 | * Link this device to its parent and siblings. | |
980 | */ | |
981 | INIT_LIST_HEAD(&device->children); | |
982 | INIT_LIST_HEAD(&device->node); | |
9e89dde2 | 983 | INIT_LIST_HEAD(&device->wakeup_list); |
1033f904 LT |
984 | INIT_LIST_HEAD(&device->physical_node_list); |
985 | mutex_init(&device->physical_node_lock); | |
bc9b6407 | 986 | INIT_LIST_HEAD(&device->power_dependent); |
1da177e4 | 987 | |
e49bd2dd ZR |
988 | new_bus_id = kzalloc(sizeof(struct acpi_device_bus_id), GFP_KERNEL); |
989 | if (!new_bus_id) { | |
d43e167d RW |
990 | pr_err(PREFIX "Memory allocation error\n"); |
991 | result = -ENOMEM; | |
992 | goto err_detach; | |
1da177e4 | 993 | } |
e49bd2dd | 994 | |
9090589d | 995 | mutex_lock(&acpi_device_lock); |
e49bd2dd ZR |
996 | /* |
997 | * Find suitable bus_id and instance number in acpi_bus_id_list | |
998 | * If failed, create one and link it into acpi_bus_id_list | |
999 | */ | |
1000 | list_for_each_entry(acpi_device_bus_id, &acpi_bus_id_list, node) { | |
1131b938 BH |
1001 | if (!strcmp(acpi_device_bus_id->bus_id, |
1002 | acpi_device_hid(device))) { | |
1003 | acpi_device_bus_id->instance_no++; | |
e49bd2dd ZR |
1004 | found = 1; |
1005 | kfree(new_bus_id); | |
1006 | break; | |
1007 | } | |
1da177e4 | 1008 | } |
0c526d96 | 1009 | if (!found) { |
e49bd2dd | 1010 | acpi_device_bus_id = new_bus_id; |
1131b938 | 1011 | strcpy(acpi_device_bus_id->bus_id, acpi_device_hid(device)); |
e49bd2dd ZR |
1012 | acpi_device_bus_id->instance_no = 0; |
1013 | list_add_tail(&acpi_device_bus_id->node, &acpi_bus_id_list); | |
1da177e4 | 1014 | } |
0794469d | 1015 | dev_set_name(&device->dev, "%s:%02x", acpi_device_bus_id->bus_id, acpi_device_bus_id->instance_no); |
1da177e4 | 1016 | |
33b57150 | 1017 | if (device->parent) |
9e89dde2 | 1018 | list_add_tail(&device->node, &device->parent->children); |
33b57150 | 1019 | |
9e89dde2 ZR |
1020 | if (device->wakeup.flags.valid) |
1021 | list_add_tail(&device->wakeup_list, &acpi_wakeup_device_list); | |
9090589d | 1022 | mutex_unlock(&acpi_device_lock); |
1da177e4 | 1023 | |
1890a97a | 1024 | if (device->parent) |
66b7ed40 | 1025 | device->dev.parent = &device->parent->dev; |
1890a97a | 1026 | device->dev.bus = &acpi_bus_type; |
82c7d5ef | 1027 | device->dev.release = release; |
cf860be6 | 1028 | result = device_add(&device->dev); |
0c526d96 | 1029 | if (result) { |
8b12b922 | 1030 | dev_err(&device->dev, "Error registering device\n"); |
d43e167d | 1031 | goto err; |
1da177e4 | 1032 | } |
1da177e4 | 1033 | |
e49bd2dd | 1034 | result = acpi_device_setup_files(device); |
0c526d96 | 1035 | if (result) |
0794469d KS |
1036 | printk(KERN_ERR PREFIX "Error creating sysfs interface for device %s\n", |
1037 | dev_name(&device->dev)); | |
1da177e4 | 1038 | |
1da177e4 | 1039 | return 0; |
d43e167d RW |
1040 | |
1041 | err: | |
9090589d | 1042 | mutex_lock(&acpi_device_lock); |
33b57150 | 1043 | if (device->parent) |
e49bd2dd | 1044 | list_del(&device->node); |
e49bd2dd | 1045 | list_del(&device->wakeup_list); |
9090589d | 1046 | mutex_unlock(&acpi_device_lock); |
d43e167d RW |
1047 | |
1048 | err_detach: | |
1049 | acpi_detach_data(device->handle, acpi_bus_data_handler); | |
e49bd2dd | 1050 | return result; |
1da177e4 LT |
1051 | } |
1052 | ||
b17b537a | 1053 | static void acpi_device_unregister(struct acpi_device *device) |
9e89dde2 | 1054 | { |
9090589d | 1055 | mutex_lock(&acpi_device_lock); |
33b57150 | 1056 | if (device->parent) |
9e89dde2 | 1057 | list_del(&device->node); |
1da177e4 | 1058 | |
9e89dde2 | 1059 | list_del(&device->wakeup_list); |
9090589d | 1060 | mutex_unlock(&acpi_device_lock); |
1da177e4 | 1061 | |
9e89dde2 | 1062 | acpi_detach_data(device->handle, acpi_bus_data_handler); |
1890a97a | 1063 | |
bc9b6407 | 1064 | acpi_power_add_remove_device(device, false); |
f883d9db | 1065 | acpi_device_remove_files(device); |
b1c0f99b RW |
1066 | if (device->remove) |
1067 | device->remove(device); | |
1068 | ||
cf860be6 | 1069 | device_del(&device->dev); |
bc9b6407 | 1070 | /* |
0aa120a0 RW |
1071 | * Transition the device to D3cold to drop the reference counts of all |
1072 | * power resources the device depends on and turn off the ones that have | |
1073 | * no more references. | |
bc9b6407 | 1074 | */ |
0aa120a0 | 1075 | acpi_device_set_power(device, ACPI_STATE_D3_COLD); |
3757b948 | 1076 | device->handle = NULL; |
cf860be6 | 1077 | put_device(&device->dev); |
1da177e4 LT |
1078 | } |
1079 | ||
9e89dde2 ZR |
1080 | /* -------------------------------------------------------------------------- |
1081 | Driver Management | |
1082 | -------------------------------------------------------------------------- */ | |
1da177e4 | 1083 | /** |
d758a8fa RD |
1084 | * acpi_bus_driver_init - add a device to a driver |
1085 | * @device: the device to add and initialize | |
1086 | * @driver: driver for the device | |
1087 | * | |
0c526d96 | 1088 | * Used to initialize a device via its device driver. Called whenever a |
1890a97a | 1089 | * driver is bound to a device. Invokes the driver's add() ops. |
1da177e4 LT |
1090 | */ |
1091 | static int | |
4be44fcd | 1092 | acpi_bus_driver_init(struct acpi_device *device, struct acpi_driver *driver) |
1da177e4 | 1093 | { |
4be44fcd | 1094 | int result = 0; |
1da177e4 | 1095 | |
1da177e4 | 1096 | if (!device || !driver) |
d550d98d | 1097 | return -EINVAL; |
1da177e4 LT |
1098 | |
1099 | if (!driver->ops.add) | |
d550d98d | 1100 | return -ENOSYS; |
1da177e4 LT |
1101 | |
1102 | result = driver->ops.add(device); | |
1103 | if (result) { | |
1104 | device->driver = NULL; | |
db89b4f0 | 1105 | device->driver_data = NULL; |
d550d98d | 1106 | return result; |
1da177e4 LT |
1107 | } |
1108 | ||
1109 | device->driver = driver; | |
1110 | ||
1111 | /* | |
1112 | * TBD - Configuration Management: Assign resources to device based | |
1113 | * upon possible configuration and currently allocated resources. | |
1114 | */ | |
1115 | ||
4be44fcd LB |
1116 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
1117 | "Driver successfully bound to device\n")); | |
d550d98d | 1118 | return 0; |
3fb02738 RS |
1119 | } |
1120 | ||
9e89dde2 ZR |
1121 | /** |
1122 | * acpi_bus_register_driver - register a driver with the ACPI bus | |
1123 | * @driver: driver being registered | |
1124 | * | |
1125 | * Registers a driver with the ACPI bus. Searches the namespace for all | |
1126 | * devices that match the driver's criteria and binds. Returns zero for | |
1127 | * success or a negative error status for failure. | |
1128 | */ | |
1129 | int acpi_bus_register_driver(struct acpi_driver *driver) | |
1da177e4 | 1130 | { |
1890a97a | 1131 | int ret; |
1da177e4 | 1132 | |
9e89dde2 ZR |
1133 | if (acpi_disabled) |
1134 | return -ENODEV; | |
1890a97a PM |
1135 | driver->drv.name = driver->name; |
1136 | driver->drv.bus = &acpi_bus_type; | |
1137 | driver->drv.owner = driver->owner; | |
1da177e4 | 1138 | |
1890a97a PM |
1139 | ret = driver_register(&driver->drv); |
1140 | return ret; | |
9e89dde2 | 1141 | } |
1da177e4 | 1142 | |
9e89dde2 ZR |
1143 | EXPORT_SYMBOL(acpi_bus_register_driver); |
1144 | ||
1145 | /** | |
1146 | * acpi_bus_unregister_driver - unregisters a driver with the APIC bus | |
1147 | * @driver: driver to unregister | |
1148 | * | |
1149 | * Unregisters a driver with the ACPI bus. Searches the namespace for all | |
1150 | * devices that match the driver's criteria and unbinds. | |
1151 | */ | |
1152 | void acpi_bus_unregister_driver(struct acpi_driver *driver) | |
1153 | { | |
1890a97a | 1154 | driver_unregister(&driver->drv); |
9e89dde2 ZR |
1155 | } |
1156 | ||
1157 | EXPORT_SYMBOL(acpi_bus_unregister_driver); | |
1158 | ||
9e89dde2 ZR |
1159 | /* -------------------------------------------------------------------------- |
1160 | Device Enumeration | |
1161 | -------------------------------------------------------------------------- */ | |
5c478f49 BH |
1162 | static struct acpi_device *acpi_bus_get_parent(acpi_handle handle) |
1163 | { | |
456de893 | 1164 | struct acpi_device *device = NULL; |
5c478f49 | 1165 | acpi_status status; |
5c478f49 BH |
1166 | |
1167 | /* | |
1168 | * Fixed hardware devices do not appear in the namespace and do not | |
1169 | * have handles, but we fabricate acpi_devices for them, so we have | |
1170 | * to deal with them specially. | |
1171 | */ | |
456de893 | 1172 | if (!handle) |
5c478f49 BH |
1173 | return acpi_root; |
1174 | ||
1175 | do { | |
1176 | status = acpi_get_parent(handle, &handle); | |
5c478f49 | 1177 | if (ACPI_FAILURE(status)) |
456de893 RW |
1178 | return status == AE_NULL_ENTRY ? NULL : acpi_root; |
1179 | } while (acpi_bus_get_device(handle, &device)); | |
1180 | return device; | |
5c478f49 BH |
1181 | } |
1182 | ||
9e89dde2 ZR |
1183 | acpi_status |
1184 | acpi_bus_get_ejd(acpi_handle handle, acpi_handle *ejd) | |
1185 | { | |
1186 | acpi_status status; | |
1187 | acpi_handle tmp; | |
1188 | struct acpi_buffer buffer = {ACPI_ALLOCATE_BUFFER, NULL}; | |
1189 | union acpi_object *obj; | |
1190 | ||
1191 | status = acpi_get_handle(handle, "_EJD", &tmp); | |
1192 | if (ACPI_FAILURE(status)) | |
1193 | return status; | |
1194 | ||
1195 | status = acpi_evaluate_object(handle, "_EJD", NULL, &buffer); | |
1196 | if (ACPI_SUCCESS(status)) { | |
1197 | obj = buffer.pointer; | |
3b5fee59 HM |
1198 | status = acpi_get_handle(ACPI_ROOT_OBJECT, obj->string.pointer, |
1199 | ejd); | |
9e89dde2 ZR |
1200 | kfree(buffer.pointer); |
1201 | } | |
1202 | return status; | |
1203 | } | |
1204 | EXPORT_SYMBOL_GPL(acpi_bus_get_ejd); | |
1205 | ||
8e4319c4 | 1206 | void acpi_bus_data_handler(acpi_handle handle, void *context) |
9e89dde2 ZR |
1207 | { |
1208 | ||
1209 | /* TBD */ | |
1210 | ||
1211 | return; | |
1212 | } | |
1213 | ||
e88c9c60 RW |
1214 | static int acpi_bus_extract_wakeup_device_power_package(acpi_handle handle, |
1215 | struct acpi_device_wakeup *wakeup) | |
9e89dde2 | 1216 | { |
b581a7f9 RW |
1217 | struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; |
1218 | union acpi_object *package = NULL; | |
9e89dde2 | 1219 | union acpi_object *element = NULL; |
b581a7f9 | 1220 | acpi_status status; |
e88c9c60 | 1221 | int err = -ENODATA; |
9e89dde2 | 1222 | |
b581a7f9 | 1223 | if (!wakeup) |
e88c9c60 | 1224 | return -EINVAL; |
9e89dde2 | 1225 | |
993cbe59 | 1226 | INIT_LIST_HEAD(&wakeup->resources); |
9e89dde2 | 1227 | |
b581a7f9 RW |
1228 | /* _PRW */ |
1229 | status = acpi_evaluate_object(handle, "_PRW", NULL, &buffer); | |
1230 | if (ACPI_FAILURE(status)) { | |
1231 | ACPI_EXCEPTION((AE_INFO, status, "Evaluating _PRW")); | |
e88c9c60 | 1232 | return err; |
b581a7f9 RW |
1233 | } |
1234 | ||
1235 | package = (union acpi_object *)buffer.pointer; | |
1236 | ||
e88c9c60 | 1237 | if (!package || package->package.count < 2) |
b581a7f9 | 1238 | goto out; |
b581a7f9 | 1239 | |
9e89dde2 | 1240 | element = &(package->package.elements[0]); |
e88c9c60 | 1241 | if (!element) |
b581a7f9 | 1242 | goto out; |
e88c9c60 | 1243 | |
9e89dde2 ZR |
1244 | if (element->type == ACPI_TYPE_PACKAGE) { |
1245 | if ((element->package.count < 2) || | |
1246 | (element->package.elements[0].type != | |
1247 | ACPI_TYPE_LOCAL_REFERENCE) | |
e88c9c60 | 1248 | || (element->package.elements[1].type != ACPI_TYPE_INTEGER)) |
b581a7f9 | 1249 | goto out; |
e88c9c60 | 1250 | |
b581a7f9 | 1251 | wakeup->gpe_device = |
9e89dde2 | 1252 | element->package.elements[0].reference.handle; |
b581a7f9 | 1253 | wakeup->gpe_number = |
9e89dde2 ZR |
1254 | (u32) element->package.elements[1].integer.value; |
1255 | } else if (element->type == ACPI_TYPE_INTEGER) { | |
b581a7f9 RW |
1256 | wakeup->gpe_device = NULL; |
1257 | wakeup->gpe_number = element->integer.value; | |
1258 | } else { | |
b581a7f9 RW |
1259 | goto out; |
1260 | } | |
9e89dde2 ZR |
1261 | |
1262 | element = &(package->package.elements[1]); | |
e88c9c60 | 1263 | if (element->type != ACPI_TYPE_INTEGER) |
b581a7f9 | 1264 | goto out; |
e88c9c60 | 1265 | |
b581a7f9 | 1266 | wakeup->sleep_state = element->integer.value; |
9e89dde2 | 1267 | |
e88c9c60 RW |
1268 | err = acpi_extract_power_resources(package, 2, &wakeup->resources); |
1269 | if (err) | |
b581a7f9 | 1270 | goto out; |
9e89dde2 | 1271 | |
0596a52b RW |
1272 | if (!list_empty(&wakeup->resources)) { |
1273 | int sleep_state; | |
9e89dde2 | 1274 | |
b5d667eb RW |
1275 | err = acpi_power_wakeup_list_init(&wakeup->resources, |
1276 | &sleep_state); | |
1277 | if (err) { | |
1278 | acpi_handle_warn(handle, "Retrieving current states " | |
1279 | "of wakeup power resources failed\n"); | |
1280 | acpi_power_resources_list_free(&wakeup->resources); | |
1281 | goto out; | |
1282 | } | |
0596a52b RW |
1283 | if (sleep_state < wakeup->sleep_state) { |
1284 | acpi_handle_warn(handle, "Overriding _PRW sleep state " | |
1285 | "(S%d) by S%d from power resources\n", | |
1286 | (int)wakeup->sleep_state, sleep_state); | |
1287 | wakeup->sleep_state = sleep_state; | |
1288 | } | |
1289 | } | |
bba63a29 | 1290 | acpi_setup_gpe_for_wake(handle, wakeup->gpe_device, wakeup->gpe_number); |
9874647b | 1291 | |
b581a7f9 RW |
1292 | out: |
1293 | kfree(buffer.pointer); | |
e88c9c60 | 1294 | return err; |
1da177e4 LT |
1295 | } |
1296 | ||
f517709d | 1297 | static void acpi_bus_set_run_wake_flags(struct acpi_device *device) |
1da177e4 | 1298 | { |
29b71a1c | 1299 | struct acpi_device_id button_device_ids[] = { |
29b71a1c | 1300 | {"PNP0C0C", 0}, |
b7e38304 | 1301 | {"PNP0C0D", 0}, |
29b71a1c TR |
1302 | {"PNP0C0E", 0}, |
1303 | {"", 0}, | |
1304 | }; | |
f517709d RW |
1305 | acpi_status status; |
1306 | acpi_event_status event_status; | |
1307 | ||
b67ea761 | 1308 | device->wakeup.flags.notifier_present = 0; |
f517709d RW |
1309 | |
1310 | /* Power button, Lid switch always enable wakeup */ | |
1311 | if (!acpi_match_device_ids(device, button_device_ids)) { | |
1312 | device->wakeup.flags.run_wake = 1; | |
b7e38304 ZR |
1313 | if (!acpi_match_device_ids(device, &button_device_ids[1])) { |
1314 | /* Do not use Lid/sleep button for S5 wakeup */ | |
1315 | if (device->wakeup.sleep_state == ACPI_STATE_S5) | |
1316 | device->wakeup.sleep_state = ACPI_STATE_S4; | |
1317 | } | |
f2b56bc8 | 1318 | device_set_wakeup_capable(&device->dev, true); |
f517709d RW |
1319 | return; |
1320 | } | |
1321 | ||
e8e18c95 RW |
1322 | status = acpi_get_gpe_status(device->wakeup.gpe_device, |
1323 | device->wakeup.gpe_number, | |
1324 | &event_status); | |
f517709d RW |
1325 | if (status == AE_OK) |
1326 | device->wakeup.flags.run_wake = | |
1327 | !!(event_status & ACPI_EVENT_FLAG_HANDLE); | |
1328 | } | |
1329 | ||
d57d09a4 | 1330 | static void acpi_bus_get_wakeup_device_flags(struct acpi_device *device) |
f517709d | 1331 | { |
d57d09a4 | 1332 | acpi_handle temp; |
f517709d | 1333 | acpi_status status = 0; |
e88c9c60 | 1334 | int err; |
29b71a1c | 1335 | |
d57d09a4 RW |
1336 | /* Presence of _PRW indicates wake capable */ |
1337 | status = acpi_get_handle(device->handle, "_PRW", &temp); | |
1338 | if (ACPI_FAILURE(status)) | |
1339 | return; | |
1340 | ||
e88c9c60 RW |
1341 | err = acpi_bus_extract_wakeup_device_power_package(device->handle, |
1342 | &device->wakeup); | |
1343 | if (err) { | |
1344 | dev_err(&device->dev, "_PRW evaluation error: %d\n", err); | |
d57d09a4 | 1345 | return; |
9e89dde2 | 1346 | } |
1da177e4 | 1347 | |
9e89dde2 | 1348 | device->wakeup.flags.valid = 1; |
9b83ccd2 | 1349 | device->wakeup.prepare_count = 0; |
f517709d | 1350 | acpi_bus_set_run_wake_flags(device); |
729b2bdb ZY |
1351 | /* Call _PSW/_DSW object to disable its ability to wake the sleeping |
1352 | * system for the ACPI device with the _PRW object. | |
1353 | * The _PSW object is depreciated in ACPI 3.0 and is replaced by _DSW. | |
1354 | * So it is necessary to call _DSW object first. Only when it is not | |
1355 | * present will the _PSW object used. | |
1356 | */ | |
e88c9c60 RW |
1357 | err = acpi_device_sleep_wake(device, 0, 0, 0); |
1358 | if (err) | |
77e76609 RW |
1359 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
1360 | "error in _DSW or _PSW evaluation\n")); | |
1da177e4 | 1361 | } |
1da177e4 | 1362 | |
f33ce568 RW |
1363 | static void acpi_bus_init_power_state(struct acpi_device *device, int state) |
1364 | { | |
1365 | struct acpi_device_power_state *ps = &device->power.states[state]; | |
ef85bdbe RW |
1366 | char pathname[5] = { '_', 'P', 'R', '0' + state, '\0' }; |
1367 | struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; | |
f33ce568 RW |
1368 | acpi_handle handle; |
1369 | acpi_status status; | |
bf325f95 | 1370 | |
f33ce568 RW |
1371 | INIT_LIST_HEAD(&ps->resources); |
1372 | ||
ef85bdbe RW |
1373 | /* Evaluate "_PRx" to get referenced power resources */ |
1374 | status = acpi_evaluate_object(device->handle, pathname, NULL, &buffer); | |
1375 | if (ACPI_SUCCESS(status)) { | |
1376 | union acpi_object *package = buffer.pointer; | |
1377 | ||
1378 | if (buffer.length && package | |
1379 | && package->type == ACPI_TYPE_PACKAGE | |
1380 | && package->package.count) { | |
e88c9c60 RW |
1381 | int err = acpi_extract_power_resources(package, 0, |
1382 | &ps->resources); | |
1383 | if (!err) | |
ef85bdbe | 1384 | device->power.flags.power_resources = 1; |
f33ce568 | 1385 | } |
ef85bdbe | 1386 | ACPI_FREE(buffer.pointer); |
f33ce568 RW |
1387 | } |
1388 | ||
1389 | /* Evaluate "_PSx" to see if we can do explicit sets */ | |
ef85bdbe RW |
1390 | pathname[2] = 'S'; |
1391 | status = acpi_get_handle(device->handle, pathname, &handle); | |
f33ce568 RW |
1392 | if (ACPI_SUCCESS(status)) |
1393 | ps->flags.explicit_set = 1; | |
1394 | ||
1395 | /* | |
1396 | * State is valid if there are means to put the device into it. | |
1397 | * D3hot is only valid if _PR3 present. | |
1398 | */ | |
ef85bdbe | 1399 | if (!list_empty(&ps->resources) |
f33ce568 RW |
1400 | || (ps->flags.explicit_set && state < ACPI_STATE_D3_HOT)) { |
1401 | ps->flags.valid = 1; | |
1402 | ps->flags.os_accessible = 1; | |
1403 | } | |
1404 | ||
1405 | ps->power = -1; /* Unknown - driver assigned */ | |
1406 | ps->latency = -1; /* Unknown - driver assigned */ | |
1407 | } | |
1408 | ||
d43e167d | 1409 | static void acpi_bus_get_power_flags(struct acpi_device *device) |
1da177e4 | 1410 | { |
8bc5053b RW |
1411 | acpi_status status; |
1412 | acpi_handle handle; | |
1413 | u32 i; | |
1a365616 | 1414 | |
d43e167d RW |
1415 | /* Presence of _PS0|_PR0 indicates 'power manageable' */ |
1416 | status = acpi_get_handle(device->handle, "_PS0", &handle); | |
1417 | if (ACPI_FAILURE(status)) { | |
1418 | status = acpi_get_handle(device->handle, "_PR0", &handle); | |
1419 | if (ACPI_FAILURE(status)) | |
1420 | return; | |
1421 | } | |
1a365616 | 1422 | |
d43e167d | 1423 | device->flags.power_manageable = 1; |
4be44fcd | 1424 | |
9e89dde2 ZR |
1425 | /* |
1426 | * Power Management Flags | |
1427 | */ | |
1428 | status = acpi_get_handle(device->handle, "_PSC", &handle); | |
1429 | if (ACPI_SUCCESS(status)) | |
1430 | device->power.flags.explicit_get = 1; | |
1431 | status = acpi_get_handle(device->handle, "_IRC", &handle); | |
1432 | if (ACPI_SUCCESS(status)) | |
1433 | device->power.flags.inrush_current = 1; | |
1da177e4 | 1434 | |
9e89dde2 ZR |
1435 | /* |
1436 | * Enumerate supported power management states | |
1437 | */ | |
f33ce568 RW |
1438 | for (i = ACPI_STATE_D0; i <= ACPI_STATE_D3_HOT; i++) |
1439 | acpi_bus_init_power_state(device, i); | |
bf325f95 | 1440 | |
0b224527 | 1441 | INIT_LIST_HEAD(&device->power.states[ACPI_STATE_D3_COLD].resources); |
1da177e4 | 1442 | |
9e89dde2 ZR |
1443 | /* Set defaults for D0 and D3 states (always valid) */ |
1444 | device->power.states[ACPI_STATE_D0].flags.valid = 1; | |
1445 | device->power.states[ACPI_STATE_D0].power = 100; | |
1446 | device->power.states[ACPI_STATE_D3].flags.valid = 1; | |
1447 | device->power.states[ACPI_STATE_D3].power = 0; | |
c8f7a62c | 1448 | |
5c7dd710 RW |
1449 | /* Set D3cold's explicit_set flag if _PS3 exists. */ |
1450 | if (device->power.states[ACPI_STATE_D3_HOT].flags.explicit_set) | |
1451 | device->power.states[ACPI_STATE_D3_COLD].flags.explicit_set = 1; | |
1452 | ||
1399dfcd AL |
1453 | /* Presence of _PS3 or _PRx means we can put the device into D3 cold */ |
1454 | if (device->power.states[ACPI_STATE_D3_HOT].flags.explicit_set || | |
1455 | device->power.flags.power_resources) | |
1456 | device->power.states[ACPI_STATE_D3_COLD].flags.os_accessible = 1; | |
1457 | ||
b3785492 RW |
1458 | if (acpi_bus_init_power(device)) { |
1459 | acpi_free_power_resources_lists(device); | |
1460 | device->flags.power_manageable = 0; | |
1461 | } | |
9e89dde2 | 1462 | } |
c8f7a62c | 1463 | |
d43e167d | 1464 | static void acpi_bus_get_flags(struct acpi_device *device) |
1da177e4 | 1465 | { |
4be44fcd LB |
1466 | acpi_status status = AE_OK; |
1467 | acpi_handle temp = NULL; | |
1da177e4 | 1468 | |
1da177e4 LT |
1469 | /* Presence of _STA indicates 'dynamic_status' */ |
1470 | status = acpi_get_handle(device->handle, "_STA", &temp); | |
1471 | if (ACPI_SUCCESS(status)) | |
1472 | device->flags.dynamic_status = 1; | |
1473 | ||
1da177e4 LT |
1474 | /* Presence of _RMV indicates 'removable' */ |
1475 | status = acpi_get_handle(device->handle, "_RMV", &temp); | |
1476 | if (ACPI_SUCCESS(status)) | |
1477 | device->flags.removable = 1; | |
1478 | ||
1479 | /* Presence of _EJD|_EJ0 indicates 'ejectable' */ | |
1480 | status = acpi_get_handle(device->handle, "_EJD", &temp); | |
1481 | if (ACPI_SUCCESS(status)) | |
1482 | device->flags.ejectable = 1; | |
1483 | else { | |
1484 | status = acpi_get_handle(device->handle, "_EJ0", &temp); | |
1485 | if (ACPI_SUCCESS(status)) | |
1486 | device->flags.ejectable = 1; | |
1487 | } | |
1da177e4 LT |
1488 | } |
1489 | ||
c7bcb4e9 | 1490 | static void acpi_device_get_busid(struct acpi_device *device) |
1da177e4 | 1491 | { |
4be44fcd LB |
1492 | char bus_id[5] = { '?', 0 }; |
1493 | struct acpi_buffer buffer = { sizeof(bus_id), bus_id }; | |
1494 | int i = 0; | |
1da177e4 LT |
1495 | |
1496 | /* | |
1497 | * Bus ID | |
1498 | * ------ | |
1499 | * The device's Bus ID is simply the object name. | |
1500 | * TBD: Shouldn't this value be unique (within the ACPI namespace)? | |
1501 | */ | |
859ac9a4 | 1502 | if (ACPI_IS_ROOT_DEVICE(device)) { |
1da177e4 | 1503 | strcpy(device->pnp.bus_id, "ACPI"); |
859ac9a4 BH |
1504 | return; |
1505 | } | |
1506 | ||
1507 | switch (device->device_type) { | |
1da177e4 LT |
1508 | case ACPI_BUS_TYPE_POWER_BUTTON: |
1509 | strcpy(device->pnp.bus_id, "PWRF"); | |
1510 | break; | |
1511 | case ACPI_BUS_TYPE_SLEEP_BUTTON: | |
1512 | strcpy(device->pnp.bus_id, "SLPF"); | |
1513 | break; | |
1514 | default: | |
66b7ed40 | 1515 | acpi_get_name(device->handle, ACPI_SINGLE_NAME, &buffer); |
1da177e4 LT |
1516 | /* Clean up trailing underscores (if any) */ |
1517 | for (i = 3; i > 1; i--) { | |
1518 | if (bus_id[i] == '_') | |
1519 | bus_id[i] = '\0'; | |
1520 | else | |
1521 | break; | |
1522 | } | |
1523 | strcpy(device->pnp.bus_id, bus_id); | |
1524 | break; | |
1525 | } | |
1526 | } | |
1527 | ||
54735266 | 1528 | /* |
d4e1a692 | 1529 | * acpi_bay_match - see if an acpi object is an ejectable driver bay |
54735266 ZR |
1530 | * |
1531 | * If an acpi object is ejectable and has one of the ACPI ATA methods defined, | |
1532 | * then we can safely call it an ejectable drive bay | |
1533 | */ | |
d4e1a692 TK |
1534 | static int acpi_bay_match(acpi_handle handle) |
1535 | { | |
54735266 | 1536 | acpi_status status; |
54735266 ZR |
1537 | acpi_handle tmp; |
1538 | acpi_handle phandle; | |
1539 | ||
54735266 ZR |
1540 | status = acpi_get_handle(handle, "_EJ0", &tmp); |
1541 | if (ACPI_FAILURE(status)) | |
1542 | return -ENODEV; | |
1543 | ||
1544 | if ((ACPI_SUCCESS(acpi_get_handle(handle, "_GTF", &tmp))) || | |
1545 | (ACPI_SUCCESS(acpi_get_handle(handle, "_GTM", &tmp))) || | |
1546 | (ACPI_SUCCESS(acpi_get_handle(handle, "_STM", &tmp))) || | |
1547 | (ACPI_SUCCESS(acpi_get_handle(handle, "_SDD", &tmp)))) | |
1548 | return 0; | |
1549 | ||
1550 | if (acpi_get_parent(handle, &phandle)) | |
1551 | return -ENODEV; | |
1552 | ||
1553 | if ((ACPI_SUCCESS(acpi_get_handle(phandle, "_GTF", &tmp))) || | |
1554 | (ACPI_SUCCESS(acpi_get_handle(phandle, "_GTM", &tmp))) || | |
1555 | (ACPI_SUCCESS(acpi_get_handle(phandle, "_STM", &tmp))) || | |
1556 | (ACPI_SUCCESS(acpi_get_handle(phandle, "_SDD", &tmp)))) | |
1557 | return 0; | |
1558 | ||
1559 | return -ENODEV; | |
1560 | } | |
1561 | ||
3620f2f2 | 1562 | /* |
d4e1a692 | 1563 | * acpi_dock_match - see if an acpi object has a _DCK method |
3620f2f2 | 1564 | */ |
d4e1a692 | 1565 | static int acpi_dock_match(acpi_handle handle) |
3620f2f2 FS |
1566 | { |
1567 | acpi_handle tmp; | |
d4e1a692 | 1568 | return acpi_get_handle(handle, "_DCK", &tmp); |
3620f2f2 FS |
1569 | } |
1570 | ||
620e112c | 1571 | const char *acpi_device_hid(struct acpi_device *device) |
15b8dd53 | 1572 | { |
7f47fa6c | 1573 | struct acpi_hardware_id *hid; |
15b8dd53 | 1574 | |
2b2ae7c7 TR |
1575 | if (list_empty(&device->pnp.ids)) |
1576 | return dummy_hid; | |
1577 | ||
7f47fa6c BH |
1578 | hid = list_first_entry(&device->pnp.ids, struct acpi_hardware_id, list); |
1579 | return hid->id; | |
1580 | } | |
1581 | EXPORT_SYMBOL(acpi_device_hid); | |
15b8dd53 | 1582 | |
d4e1a692 | 1583 | static void acpi_add_id(struct acpi_device_pnp *pnp, const char *dev_id) |
7f47fa6c BH |
1584 | { |
1585 | struct acpi_hardware_id *id; | |
15b8dd53 | 1586 | |
7f47fa6c BH |
1587 | id = kmalloc(sizeof(*id), GFP_KERNEL); |
1588 | if (!id) | |
1589 | return; | |
15b8dd53 | 1590 | |
581de59e | 1591 | id->id = kstrdup(dev_id, GFP_KERNEL); |
7f47fa6c BH |
1592 | if (!id->id) { |
1593 | kfree(id); | |
1594 | return; | |
15b8dd53 BM |
1595 | } |
1596 | ||
d4e1a692 TK |
1597 | list_add_tail(&id->list, &pnp->ids); |
1598 | pnp->type.hardware_id = 1; | |
15b8dd53 BM |
1599 | } |
1600 | ||
222e82ac DW |
1601 | /* |
1602 | * Old IBM workstations have a DSDT bug wherein the SMBus object | |
1603 | * lacks the SMBUS01 HID and the methods do not have the necessary "_" | |
1604 | * prefix. Work around this. | |
1605 | */ | |
d4e1a692 | 1606 | static int acpi_ibm_smbus_match(acpi_handle handle) |
222e82ac DW |
1607 | { |
1608 | acpi_handle h_dummy; | |
1609 | struct acpi_buffer path = {ACPI_ALLOCATE_BUFFER, NULL}; | |
1610 | int result; | |
1611 | ||
1612 | if (!dmi_name_in_vendors("IBM")) | |
1613 | return -ENODEV; | |
1614 | ||
1615 | /* Look for SMBS object */ | |
d4e1a692 | 1616 | result = acpi_get_name(handle, ACPI_SINGLE_NAME, &path); |
222e82ac DW |
1617 | if (result) |
1618 | return result; | |
1619 | ||
1620 | if (strcmp("SMBS", path.pointer)) { | |
1621 | result = -ENODEV; | |
1622 | goto out; | |
1623 | } | |
1624 | ||
1625 | /* Does it have the necessary (but misnamed) methods? */ | |
1626 | result = -ENODEV; | |
d4e1a692 TK |
1627 | if (ACPI_SUCCESS(acpi_get_handle(handle, "SBI", &h_dummy)) && |
1628 | ACPI_SUCCESS(acpi_get_handle(handle, "SBR", &h_dummy)) && | |
1629 | ACPI_SUCCESS(acpi_get_handle(handle, "SBW", &h_dummy))) | |
222e82ac DW |
1630 | result = 0; |
1631 | out: | |
1632 | kfree(path.pointer); | |
1633 | return result; | |
1634 | } | |
1635 | ||
c0af4175 TK |
1636 | static void acpi_set_pnp_ids(acpi_handle handle, struct acpi_device_pnp *pnp, |
1637 | int device_type) | |
1da177e4 | 1638 | { |
4be44fcd | 1639 | acpi_status status; |
57f3674f | 1640 | struct acpi_device_info *info; |
78e25fef | 1641 | struct acpi_pnp_device_id_list *cid_list; |
7f47fa6c | 1642 | int i; |
1da177e4 | 1643 | |
c0af4175 | 1644 | switch (device_type) { |
1da177e4 | 1645 | case ACPI_BUS_TYPE_DEVICE: |
c0af4175 TK |
1646 | if (handle == ACPI_ROOT_OBJECT) { |
1647 | acpi_add_id(pnp, ACPI_SYSTEM_HID); | |
859ac9a4 BH |
1648 | break; |
1649 | } | |
1650 | ||
c0af4175 | 1651 | status = acpi_get_object_info(handle, &info); |
1da177e4 | 1652 | if (ACPI_FAILURE(status)) { |
c0af4175 TK |
1653 | pr_err(PREFIX "%s: Error reading device info\n", |
1654 | __func__); | |
1da177e4 LT |
1655 | return; |
1656 | } | |
1657 | ||
1da177e4 | 1658 | if (info->valid & ACPI_VALID_HID) |
c0af4175 | 1659 | acpi_add_id(pnp, info->hardware_id.string); |
57f3674f | 1660 | if (info->valid & ACPI_VALID_CID) { |
15b8dd53 | 1661 | cid_list = &info->compatible_id_list; |
57f3674f | 1662 | for (i = 0; i < cid_list->count; i++) |
c0af4175 | 1663 | acpi_add_id(pnp, cid_list->ids[i].string); |
57f3674f | 1664 | } |
1da177e4 | 1665 | if (info->valid & ACPI_VALID_ADR) { |
c0af4175 TK |
1666 | pnp->bus_address = info->address; |
1667 | pnp->type.bus_address = 1; | |
1da177e4 | 1668 | } |
ccf78040 | 1669 | if (info->valid & ACPI_VALID_UID) |
c0af4175 | 1670 | pnp->unique_id = kstrdup(info->unique_id.string, |
ccf78040 | 1671 | GFP_KERNEL); |
ae843332 | 1672 | |
a83893ae BH |
1673 | kfree(info); |
1674 | ||
57f3674f BH |
1675 | /* |
1676 | * Some devices don't reliably have _HIDs & _CIDs, so add | |
1677 | * synthetic HIDs to make sure drivers can find them. | |
1678 | */ | |
c0af4175 TK |
1679 | if (acpi_is_video_device(handle)) |
1680 | acpi_add_id(pnp, ACPI_VIDEO_HID); | |
1681 | else if (ACPI_SUCCESS(acpi_bay_match(handle))) | |
1682 | acpi_add_id(pnp, ACPI_BAY_HID); | |
1683 | else if (ACPI_SUCCESS(acpi_dock_match(handle))) | |
1684 | acpi_add_id(pnp, ACPI_DOCK_HID); | |
1685 | else if (!acpi_ibm_smbus_match(handle)) | |
1686 | acpi_add_id(pnp, ACPI_SMBUS_IBM_HID); | |
1687 | else if (list_empty(&pnp->ids) && handle == ACPI_ROOT_OBJECT) { | |
1688 | acpi_add_id(pnp, ACPI_BUS_HID); /* \_SB, LNXSYBUS */ | |
1689 | strcpy(pnp->device_name, ACPI_BUS_DEVICE_NAME); | |
1690 | strcpy(pnp->device_class, ACPI_BUS_CLASS); | |
b7b30de5 | 1691 | } |
54735266 | 1692 | |
1da177e4 LT |
1693 | break; |
1694 | case ACPI_BUS_TYPE_POWER: | |
c0af4175 | 1695 | acpi_add_id(pnp, ACPI_POWER_HID); |
1da177e4 LT |
1696 | break; |
1697 | case ACPI_BUS_TYPE_PROCESSOR: | |
c0af4175 | 1698 | acpi_add_id(pnp, ACPI_PROCESSOR_OBJECT_HID); |
1da177e4 | 1699 | break; |
1da177e4 | 1700 | case ACPI_BUS_TYPE_THERMAL: |
c0af4175 | 1701 | acpi_add_id(pnp, ACPI_THERMAL_HID); |
1da177e4 LT |
1702 | break; |
1703 | case ACPI_BUS_TYPE_POWER_BUTTON: | |
c0af4175 | 1704 | acpi_add_id(pnp, ACPI_BUTTON_HID_POWERF); |
1da177e4 LT |
1705 | break; |
1706 | case ACPI_BUS_TYPE_SLEEP_BUTTON: | |
c0af4175 | 1707 | acpi_add_id(pnp, ACPI_BUTTON_HID_SLEEPF); |
1da177e4 LT |
1708 | break; |
1709 | } | |
1da177e4 LT |
1710 | } |
1711 | ||
c0af4175 TK |
1712 | void acpi_free_pnp_ids(struct acpi_device_pnp *pnp) |
1713 | { | |
1714 | struct acpi_hardware_id *id, *tmp; | |
1715 | ||
1716 | list_for_each_entry_safe(id, tmp, &pnp->ids, list) { | |
1717 | kfree(id->id); | |
1718 | kfree(id); | |
1719 | } | |
1720 | kfree(pnp->unique_id); | |
1721 | } | |
1722 | ||
82c7d5ef RW |
1723 | void acpi_init_device_object(struct acpi_device *device, acpi_handle handle, |
1724 | int type, unsigned long long sta) | |
1da177e4 | 1725 | { |
d43e167d RW |
1726 | INIT_LIST_HEAD(&device->pnp.ids); |
1727 | device->device_type = type; | |
1728 | device->handle = handle; | |
1729 | device->parent = acpi_bus_get_parent(handle); | |
1730 | STRUCT_TO_INT(device->status) = sta; | |
1731 | acpi_device_get_busid(device); | |
c0af4175 | 1732 | acpi_set_pnp_ids(handle, &device->pnp, type); |
d43e167d | 1733 | acpi_bus_get_flags(device); |
2c0d4fe0 | 1734 | device->flags.match_driver = false; |
cf860be6 RW |
1735 | device_initialize(&device->dev); |
1736 | dev_set_uevent_suppress(&device->dev, true); | |
1737 | } | |
bc3b0772 | 1738 | |
cf860be6 RW |
1739 | void acpi_device_add_finalize(struct acpi_device *device) |
1740 | { | |
2c0d4fe0 | 1741 | device->flags.match_driver = true; |
cf860be6 RW |
1742 | dev_set_uevent_suppress(&device->dev, false); |
1743 | kobject_uevent(&device->dev.kobj, KOBJ_ADD); | |
1da177e4 LT |
1744 | } |
1745 | ||
5c478f49 BH |
1746 | static int acpi_add_single_object(struct acpi_device **child, |
1747 | acpi_handle handle, int type, | |
2c0d4fe0 | 1748 | unsigned long long sta) |
1da177e4 | 1749 | { |
77c24888 BH |
1750 | int result; |
1751 | struct acpi_device *device; | |
29aaefa6 | 1752 | struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; |
1da177e4 | 1753 | |
36bcbec7 | 1754 | device = kzalloc(sizeof(struct acpi_device), GFP_KERNEL); |
1da177e4 | 1755 | if (!device) { |
6468463a | 1756 | printk(KERN_ERR PREFIX "Memory allocation error\n"); |
d550d98d | 1757 | return -ENOMEM; |
1da177e4 | 1758 | } |
1da177e4 | 1759 | |
d43e167d RW |
1760 | acpi_init_device_object(device, handle, type, sta); |
1761 | acpi_bus_get_power_flags(device); | |
d57d09a4 | 1762 | acpi_bus_get_wakeup_device_flags(device); |
1da177e4 | 1763 | |
cf860be6 | 1764 | result = acpi_device_add(device, acpi_device_release); |
d43e167d | 1765 | if (result) { |
718fb0de | 1766 | acpi_device_release(&device->dev); |
d43e167d RW |
1767 | return result; |
1768 | } | |
1da177e4 | 1769 | |
d43e167d | 1770 | acpi_power_add_remove_device(device, true); |
cf860be6 | 1771 | acpi_device_add_finalize(device); |
d43e167d RW |
1772 | acpi_get_name(handle, ACPI_FULL_PATHNAME, &buffer); |
1773 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Added %s [%s] parent %s\n", | |
1774 | dev_name(&device->dev), (char *) buffer.pointer, | |
1775 | device->parent ? dev_name(&device->parent->dev) : "(null)")); | |
1776 | kfree(buffer.pointer); | |
1777 | *child = device; | |
1778 | return 0; | |
bf325f95 RW |
1779 | } |
1780 | ||
778cbc1d BH |
1781 | static int acpi_bus_type_and_status(acpi_handle handle, int *type, |
1782 | unsigned long long *sta) | |
1da177e4 | 1783 | { |
778cbc1d BH |
1784 | acpi_status status; |
1785 | acpi_object_type acpi_type; | |
1da177e4 | 1786 | |
778cbc1d | 1787 | status = acpi_get_type(handle, &acpi_type); |
51a85faf | 1788 | if (ACPI_FAILURE(status)) |
778cbc1d | 1789 | return -ENODEV; |
4be44fcd | 1790 | |
778cbc1d | 1791 | switch (acpi_type) { |
51a85faf BH |
1792 | case ACPI_TYPE_ANY: /* for ACPI_ROOT_OBJECT */ |
1793 | case ACPI_TYPE_DEVICE: | |
778cbc1d BH |
1794 | *type = ACPI_BUS_TYPE_DEVICE; |
1795 | status = acpi_bus_get_status_handle(handle, sta); | |
1796 | if (ACPI_FAILURE(status)) | |
1797 | return -ENODEV; | |
51a85faf BH |
1798 | break; |
1799 | case ACPI_TYPE_PROCESSOR: | |
778cbc1d BH |
1800 | *type = ACPI_BUS_TYPE_PROCESSOR; |
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_THERMAL: | |
778cbc1d BH |
1806 | *type = ACPI_BUS_TYPE_THERMAL; |
1807 | *sta = ACPI_STA_DEFAULT; | |
51a85faf BH |
1808 | break; |
1809 | case ACPI_TYPE_POWER: | |
778cbc1d BH |
1810 | *type = ACPI_BUS_TYPE_POWER; |
1811 | *sta = ACPI_STA_DEFAULT; | |
51a85faf BH |
1812 | break; |
1813 | default: | |
778cbc1d | 1814 | return -ENODEV; |
51a85faf | 1815 | } |
1da177e4 | 1816 | |
778cbc1d BH |
1817 | return 0; |
1818 | } | |
1819 | ||
4b59cc1f RW |
1820 | static bool acpi_scan_handler_matching(struct acpi_scan_handler *handler, |
1821 | char *idstr, | |
1822 | const struct acpi_device_id **matchid) | |
1823 | { | |
1824 | const struct acpi_device_id *devid; | |
1825 | ||
1826 | for (devid = handler->ids; devid->id[0]; devid++) | |
1827 | if (!strcmp((char *)devid->id, idstr)) { | |
1828 | if (matchid) | |
1829 | *matchid = devid; | |
1830 | ||
1831 | return true; | |
1832 | } | |
1833 | ||
1834 | return false; | |
1835 | } | |
1836 | ||
6b772e8f TK |
1837 | static struct acpi_scan_handler *acpi_scan_match_handler(char *idstr, |
1838 | const struct acpi_device_id **matchid) | |
1839 | { | |
1840 | struct acpi_scan_handler *handler; | |
1841 | ||
1842 | list_for_each_entry(handler, &acpi_scan_handlers_list, list_node) | |
1843 | if (acpi_scan_handler_matching(handler, idstr, matchid)) | |
1844 | return handler; | |
1845 | ||
1846 | return NULL; | |
1847 | } | |
1848 | ||
3f8055c3 RW |
1849 | void acpi_scan_hotplug_enabled(struct acpi_hotplug_profile *hotplug, bool val) |
1850 | { | |
3f8055c3 RW |
1851 | if (!!hotplug->enabled == !!val) |
1852 | return; | |
1853 | ||
1854 | mutex_lock(&acpi_scan_lock); | |
1855 | ||
1856 | hotplug->enabled = val; | |
3f8055c3 RW |
1857 | |
1858 | mutex_unlock(&acpi_scan_lock); | |
1859 | } | |
1860 | ||
6b772e8f | 1861 | static void acpi_scan_init_hotplug(acpi_handle handle, int type) |
a33ec399 | 1862 | { |
6b772e8f TK |
1863 | struct acpi_device_pnp pnp = {}; |
1864 | struct acpi_hardware_id *hwid; | |
a33ec399 RW |
1865 | struct acpi_scan_handler *handler; |
1866 | ||
6b772e8f TK |
1867 | INIT_LIST_HEAD(&pnp.ids); |
1868 | acpi_set_pnp_ids(handle, &pnp, type); | |
a33ec399 | 1869 | |
6b772e8f | 1870 | if (!pnp.type.hardware_id) |
a33ec399 | 1871 | return; |
a33ec399 RW |
1872 | |
1873 | /* | |
1874 | * This relies on the fact that acpi_install_notify_handler() will not | |
1875 | * install the same notify handler routine twice for the same handle. | |
1876 | */ | |
6b772e8f TK |
1877 | list_for_each_entry(hwid, &pnp.ids, list) { |
1878 | handler = acpi_scan_match_handler(hwid->id, NULL); | |
1879 | if (handler) { | |
2cbb14fb TK |
1880 | acpi_install_notify_handler(handle, ACPI_SYSTEM_NOTIFY, |
1881 | acpi_hotplug_notify_cb, handler); | |
6b772e8f TK |
1882 | break; |
1883 | } | |
1884 | } | |
1885 | ||
1886 | acpi_free_pnp_ids(&pnp); | |
a33ec399 RW |
1887 | } |
1888 | ||
e3863094 RW |
1889 | static acpi_status acpi_bus_check_add(acpi_handle handle, u32 lvl_not_used, |
1890 | void *not_used, void **return_value) | |
778cbc1d | 1891 | { |
805d410f | 1892 | struct acpi_device *device = NULL; |
778cbc1d BH |
1893 | int type; |
1894 | unsigned long long sta; | |
e3b87f8a | 1895 | acpi_status status; |
778cbc1d BH |
1896 | int result; |
1897 | ||
4002bf38 RW |
1898 | acpi_bus_get_device(handle, &device); |
1899 | if (device) | |
1900 | goto out; | |
1901 | ||
778cbc1d BH |
1902 | result = acpi_bus_type_and_status(handle, &type, &sta); |
1903 | if (result) | |
1904 | return AE_OK; | |
1905 | ||
82c7d5ef RW |
1906 | if (type == ACPI_BUS_TYPE_POWER) { |
1907 | acpi_add_power_resource(handle); | |
1908 | return AE_OK; | |
1909 | } | |
1910 | ||
6b772e8f | 1911 | acpi_scan_init_hotplug(handle, type); |
a33ec399 | 1912 | |
778cbc1d | 1913 | if (!(sta & ACPI_STA_DEVICE_PRESENT) && |
b581a7f9 | 1914 | !(sta & ACPI_STA_DEVICE_FUNCTIONING)) { |
86e4e20e RW |
1915 | struct acpi_device_wakeup wakeup; |
1916 | acpi_handle temp; | |
1917 | ||
1918 | status = acpi_get_handle(handle, "_PRW", &temp); | |
993cbe59 | 1919 | if (ACPI_SUCCESS(status)) { |
86e4e20e RW |
1920 | acpi_bus_extract_wakeup_device_power_package(handle, |
1921 | &wakeup); | |
993cbe59 RW |
1922 | acpi_power_resources_list_free(&wakeup.resources); |
1923 | } | |
778cbc1d | 1924 | return AE_CTRL_DEPTH; |
b581a7f9 | 1925 | } |
778cbc1d | 1926 | |
2c0d4fe0 | 1927 | acpi_add_single_object(&device, handle, type, sta); |
e3b87f8a | 1928 | if (!device) |
51a85faf | 1929 | return AE_CTRL_DEPTH; |
1da177e4 | 1930 | |
4002bf38 | 1931 | out: |
51a85faf BH |
1932 | if (!*return_value) |
1933 | *return_value = device; | |
805d410f | 1934 | |
51a85faf BH |
1935 | return AE_OK; |
1936 | } | |
3fb02738 | 1937 | |
c5698074 | 1938 | static int acpi_scan_attach_handler(struct acpi_device *device) |
ca589f94 | 1939 | { |
c5698074 RW |
1940 | struct acpi_hardware_id *hwid; |
1941 | int ret = 0; | |
ca589f94 | 1942 | |
c5698074 | 1943 | list_for_each_entry(hwid, &device->pnp.ids, list) { |
87b85b3c | 1944 | const struct acpi_device_id *devid; |
c5698074 | 1945 | struct acpi_scan_handler *handler; |
ca589f94 | 1946 | |
c5698074 RW |
1947 | handler = acpi_scan_match_handler(hwid->id, &devid); |
1948 | if (handler) { | |
87b85b3c RW |
1949 | ret = handler->attach(device, devid); |
1950 | if (ret > 0) { | |
1951 | device->handler = handler; | |
c5698074 | 1952 | break; |
87b85b3c | 1953 | } else if (ret < 0) { |
c5698074 | 1954 | break; |
87b85b3c | 1955 | } |
ca589f94 RW |
1956 | } |
1957 | } | |
1958 | return ret; | |
1959 | } | |
1960 | ||
0fc300b0 RW |
1961 | static acpi_status acpi_bus_device_attach(acpi_handle handle, u32 lvl_not_used, |
1962 | void *not_used, void **ret_not_used) | |
51a85faf | 1963 | { |
805d410f RW |
1964 | struct acpi_device *device; |
1965 | unsigned long long sta_not_used; | |
ca589f94 | 1966 | int ret; |
3fb02738 | 1967 | |
805d410f RW |
1968 | /* |
1969 | * Ignore errors ignored by acpi_bus_check_add() to avoid terminating | |
1970 | * namespace walks prematurely. | |
1971 | */ | |
ca589f94 | 1972 | if (acpi_bus_type_and_status(handle, &ret, &sta_not_used)) |
805d410f | 1973 | return AE_OK; |
1da177e4 | 1974 | |
805d410f RW |
1975 | if (acpi_bus_get_device(handle, &device)) |
1976 | return AE_CTRL_DEPTH; | |
7779688f | 1977 | |
ca589f94 RW |
1978 | ret = acpi_scan_attach_handler(device); |
1979 | if (ret) | |
1980 | return ret > 0 ? AE_OK : AE_CTRL_DEPTH; | |
1981 | ||
1982 | ret = device_attach(&device->dev); | |
1983 | return ret >= 0 ? AE_OK : AE_CTRL_DEPTH; | |
1da177e4 | 1984 | } |
1da177e4 | 1985 | |
636458de | 1986 | /** |
b8bd759a | 1987 | * acpi_bus_scan - Add ACPI device node objects in a given namespace scope. |
636458de | 1988 | * @handle: Root of the namespace scope to scan. |
7779688f | 1989 | * |
636458de RW |
1990 | * Scan a given ACPI tree (probably recently hot-plugged) and create and add |
1991 | * found devices. | |
7779688f | 1992 | * |
636458de RW |
1993 | * If no devices were found, -ENODEV is returned, but it does not mean that |
1994 | * there has been a real error. There just have been no suitable ACPI objects | |
1995 | * in the table trunk from which the kernel could create a device and add an | |
1996 | * appropriate driver. | |
3757b948 RW |
1997 | * |
1998 | * Must be called under acpi_scan_lock. | |
7779688f | 1999 | */ |
b8bd759a | 2000 | int acpi_bus_scan(acpi_handle handle) |
3fb02738 | 2001 | { |
b8bd759a | 2002 | void *device = NULL; |
c511cc19 | 2003 | int error = 0; |
3fb02738 | 2004 | |
b8bd759a RW |
2005 | if (ACPI_SUCCESS(acpi_bus_check_add(handle, 0, NULL, &device))) |
2006 | acpi_walk_namespace(ACPI_TYPE_ANY, handle, ACPI_UINT32_MAX, | |
2007 | acpi_bus_check_add, NULL, NULL, &device); | |
3fb02738 | 2008 | |
d2f6650a | 2009 | if (!device) |
c511cc19 RW |
2010 | error = -ENODEV; |
2011 | else if (ACPI_SUCCESS(acpi_bus_device_attach(handle, 0, NULL, NULL))) | |
b8bd759a RW |
2012 | acpi_walk_namespace(ACPI_TYPE_ANY, handle, ACPI_UINT32_MAX, |
2013 | acpi_bus_device_attach, NULL, NULL, NULL); | |
3fb02738 | 2014 | |
c511cc19 | 2015 | return error; |
3fb02738 | 2016 | } |
b8bd759a | 2017 | EXPORT_SYMBOL(acpi_bus_scan); |
a2100801 | 2018 | |
05404d8f RW |
2019 | static acpi_status acpi_bus_device_detach(acpi_handle handle, u32 lvl_not_used, |
2020 | void *not_used, void **ret_not_used) | |
2021 | { | |
2022 | struct acpi_device *device = NULL; | |
a2100801 | 2023 | |
05404d8f | 2024 | if (!acpi_bus_get_device(handle, &device)) { |
ca589f94 RW |
2025 | struct acpi_scan_handler *dev_handler = device->handler; |
2026 | ||
ca589f94 RW |
2027 | if (dev_handler) { |
2028 | if (dev_handler->detach) | |
2029 | dev_handler->detach(device); | |
2030 | ||
2031 | device->handler = NULL; | |
2032 | } else { | |
2033 | device_release_driver(&device->dev); | |
2034 | } | |
05404d8f RW |
2035 | } |
2036 | return AE_OK; | |
3fb02738 | 2037 | } |
1da177e4 | 2038 | |
05404d8f RW |
2039 | static acpi_status acpi_bus_remove(acpi_handle handle, u32 lvl_not_used, |
2040 | void *not_used, void **ret_not_used) | |
1da177e4 | 2041 | { |
05404d8f | 2042 | struct acpi_device *device = NULL; |
4be44fcd | 2043 | |
05404d8f RW |
2044 | if (!acpi_bus_get_device(handle, &device)) |
2045 | acpi_device_unregister(device); | |
1da177e4 | 2046 | |
05404d8f RW |
2047 | return AE_OK; |
2048 | } | |
1da177e4 | 2049 | |
3757b948 RW |
2050 | /** |
2051 | * acpi_bus_trim - Remove ACPI device node and all of its descendants | |
2052 | * @start: Root of the ACPI device nodes subtree to remove. | |
2053 | * | |
2054 | * Must be called under acpi_scan_lock. | |
2055 | */ | |
bfee26db | 2056 | void acpi_bus_trim(struct acpi_device *start) |
1da177e4 | 2057 | { |
05404d8f RW |
2058 | /* |
2059 | * Execute acpi_bus_device_detach() as a post-order callback to detach | |
2060 | * all ACPI drivers from the device nodes being removed. | |
2061 | */ | |
2062 | acpi_walk_namespace(ACPI_TYPE_ANY, start->handle, ACPI_UINT32_MAX, NULL, | |
2063 | acpi_bus_device_detach, NULL, NULL); | |
2064 | acpi_bus_device_detach(start->handle, 0, NULL, NULL); | |
cecdb193 RW |
2065 | /* |
2066 | * Execute acpi_bus_remove() as a post-order callback to remove device | |
2067 | * nodes in the given namespace scope. | |
2068 | */ | |
2069 | acpi_walk_namespace(ACPI_TYPE_ANY, start->handle, ACPI_UINT32_MAX, NULL, | |
2070 | acpi_bus_remove, NULL, NULL); | |
2071 | acpi_bus_remove(start->handle, 0, NULL, NULL); | |
1da177e4 | 2072 | } |
ceaba663 KA |
2073 | EXPORT_SYMBOL_GPL(acpi_bus_trim); |
2074 | ||
e8b945c9 | 2075 | static int acpi_bus_scan_fixed(void) |
1da177e4 | 2076 | { |
4be44fcd | 2077 | int result = 0; |
c4168bff | 2078 | |
1da177e4 LT |
2079 | /* |
2080 | * Enumerate all fixed-feature devices. | |
2081 | */ | |
2c0d4fe0 RW |
2082 | if (!(acpi_gbl_FADT.flags & ACPI_FADT_POWER_BUTTON)) { |
2083 | struct acpi_device *device = NULL; | |
2084 | ||
5c478f49 | 2085 | result = acpi_add_single_object(&device, NULL, |
c4168bff | 2086 | ACPI_BUS_TYPE_POWER_BUTTON, |
2c0d4fe0 RW |
2087 | ACPI_STA_DEFAULT); |
2088 | if (result) | |
2089 | return result; | |
2090 | ||
2091 | result = device_attach(&device->dev); | |
2092 | if (result < 0) | |
2093 | return result; | |
2094 | ||
c10d7a13 | 2095 | device_init_wakeup(&device->dev, true); |
3fb02738 | 2096 | } |
1da177e4 | 2097 | |
2c0d4fe0 RW |
2098 | if (!(acpi_gbl_FADT.flags & ACPI_FADT_SLEEP_BUTTON)) { |
2099 | struct acpi_device *device = NULL; | |
2100 | ||
5c478f49 | 2101 | result = acpi_add_single_object(&device, NULL, |
c4168bff | 2102 | ACPI_BUS_TYPE_SLEEP_BUTTON, |
2c0d4fe0 RW |
2103 | ACPI_STA_DEFAULT); |
2104 | if (result) | |
2105 | return result; | |
2106 | ||
2107 | result = device_attach(&device->dev); | |
3fb02738 | 2108 | } |
1da177e4 | 2109 | |
2c0d4fe0 | 2110 | return result < 0 ? result : 0; |
1da177e4 LT |
2111 | } |
2112 | ||
e747f274 | 2113 | int __init acpi_scan_init(void) |
1da177e4 LT |
2114 | { |
2115 | int result; | |
1da177e4 | 2116 | |
5b327265 PM |
2117 | result = bus_register(&acpi_bus_type); |
2118 | if (result) { | |
2119 | /* We don't want to quit even if we failed to add suspend/resume */ | |
2120 | printk(KERN_ERR PREFIX "Could not register bus type\n"); | |
2121 | } | |
2122 | ||
92ef2a25 | 2123 | acpi_pci_root_init(); |
4daeaf68 | 2124 | acpi_pci_link_init(); |
ac212b69 | 2125 | acpi_processor_init(); |
141a297b | 2126 | acpi_platform_init(); |
f58b082a | 2127 | acpi_lpss_init(); |
13176bbf | 2128 | acpi_csrt_init(); |
737f1a9f | 2129 | acpi_container_init(); |
0a347644 | 2130 | acpi_memory_hotplug_init(); |
97d9a9e9 | 2131 | |
3757b948 | 2132 | mutex_lock(&acpi_scan_lock); |
1da177e4 LT |
2133 | /* |
2134 | * Enumerate devices in the ACPI namespace. | |
2135 | */ | |
0cd6ac52 RW |
2136 | result = acpi_bus_scan(ACPI_ROOT_OBJECT); |
2137 | if (result) | |
3757b948 | 2138 | goto out; |
1da177e4 | 2139 | |
0cd6ac52 | 2140 | result = acpi_bus_get_device(ACPI_ROOT_OBJECT, &acpi_root); |
1da177e4 | 2141 | if (result) |
3757b948 | 2142 | goto out; |
1da177e4 | 2143 | |
b8bd759a RW |
2144 | result = acpi_bus_scan_fixed(); |
2145 | if (result) { | |
b17b537a | 2146 | acpi_device_unregister(acpi_root); |
3757b948 | 2147 | goto out; |
b8bd759a | 2148 | } |
1da177e4 | 2149 | |
b8bd759a | 2150 | acpi_update_all_gpes(); |
3757b948 | 2151 | |
668192b6 YL |
2152 | acpi_pci_root_hp_init(); |
2153 | ||
3757b948 RW |
2154 | out: |
2155 | mutex_unlock(&acpi_scan_lock); | |
2156 | return result; | |
1da177e4 | 2157 | } |