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 | ||
620e112c | 30 | static const char *dummy_hid = "device"; |
2b2ae7c7 | 31 | |
1da177e4 | 32 | static LIST_HEAD(acpi_device_list); |
e49bd2dd | 33 | static LIST_HEAD(acpi_bus_id_list); |
c511cc19 | 34 | static DEFINE_MUTEX(acpi_scan_lock); |
ca589f94 | 35 | static LIST_HEAD(acpi_scan_handlers_list); |
9090589d | 36 | DEFINE_MUTEX(acpi_device_lock); |
1da177e4 LT |
37 | LIST_HEAD(acpi_wakeup_device_list); |
38 | ||
e49bd2dd | 39 | struct acpi_device_bus_id{ |
bb095854 | 40 | char bus_id[15]; |
e49bd2dd ZR |
41 | unsigned int instance_no; |
42 | struct list_head node; | |
1da177e4 | 43 | }; |
29b71a1c | 44 | |
3757b948 RW |
45 | void acpi_scan_lock_acquire(void) |
46 | { | |
47 | mutex_lock(&acpi_scan_lock); | |
48 | } | |
49 | EXPORT_SYMBOL_GPL(acpi_scan_lock_acquire); | |
50 | ||
51 | void acpi_scan_lock_release(void) | |
52 | { | |
53 | mutex_unlock(&acpi_scan_lock); | |
54 | } | |
55 | EXPORT_SYMBOL_GPL(acpi_scan_lock_release); | |
56 | ||
ca589f94 RW |
57 | int acpi_scan_add_handler(struct acpi_scan_handler *handler) |
58 | { | |
59 | if (!handler || !handler->attach) | |
60 | return -EINVAL; | |
61 | ||
62 | list_add_tail(&handler->list_node, &acpi_scan_handlers_list); | |
63 | return 0; | |
64 | } | |
65 | ||
3f8055c3 RW |
66 | int acpi_scan_add_handler_with_hotplug(struct acpi_scan_handler *handler, |
67 | const char *hotplug_profile_name) | |
68 | { | |
69 | int error; | |
70 | ||
71 | error = acpi_scan_add_handler(handler); | |
72 | if (error) | |
73 | return error; | |
74 | ||
75 | acpi_sysfs_add_hotplug_profile(&handler->hotplug, hotplug_profile_name); | |
76 | return 0; | |
77 | } | |
78 | ||
29b71a1c TR |
79 | /* |
80 | * Creates hid/cid(s) string needed for modalias and uevent | |
81 | * e.g. on a device with hid:IBM0001 and cid:ACPI0001 you get: | |
82 | * char *modalias: "acpi:IBM0001:ACPI0001" | |
83 | */ | |
b3e572d2 AB |
84 | static int create_modalias(struct acpi_device *acpi_dev, char *modalias, |
85 | int size) | |
86 | { | |
29b71a1c | 87 | int len; |
5c9fcb5d | 88 | int count; |
7f47fa6c | 89 | struct acpi_hardware_id *id; |
29b71a1c | 90 | |
2b2ae7c7 TR |
91 | if (list_empty(&acpi_dev->pnp.ids)) |
92 | return 0; | |
93 | ||
5c9fcb5d | 94 | len = snprintf(modalias, size, "acpi:"); |
29b71a1c TR |
95 | size -= len; |
96 | ||
7f47fa6c BH |
97 | list_for_each_entry(id, &acpi_dev->pnp.ids, list) { |
98 | count = snprintf(&modalias[len], size, "%s:", id->id); | |
5c9fcb5d ZR |
99 | if (count < 0 || count >= size) |
100 | return -EINVAL; | |
101 | len += count; | |
102 | size -= count; | |
103 | } | |
104 | ||
29b71a1c TR |
105 | modalias[len] = '\0'; |
106 | return len; | |
107 | } | |
108 | ||
109 | static ssize_t | |
110 | acpi_device_modalias_show(struct device *dev, struct device_attribute *attr, char *buf) { | |
111 | struct acpi_device *acpi_dev = to_acpi_device(dev); | |
112 | int len; | |
113 | ||
114 | /* Device has no HID and no CID or string is >1024 */ | |
115 | len = create_modalias(acpi_dev, buf, 1024); | |
116 | if (len <= 0) | |
117 | return 0; | |
118 | buf[len++] = '\n'; | |
119 | return len; | |
120 | } | |
121 | static DEVICE_ATTR(modalias, 0444, acpi_device_modalias_show, NULL); | |
122 | ||
a33ec399 | 123 | static int acpi_scan_hot_remove(struct acpi_device *device) |
1da177e4 | 124 | { |
5993c467 | 125 | acpi_handle handle = device->handle; |
a33ec399 | 126 | acpi_handle not_used; |
1da177e4 LT |
127 | struct acpi_object_list arg_list; |
128 | union acpi_object arg; | |
a33ec399 | 129 | acpi_status status; |
f058cdf4 | 130 | |
3757b948 | 131 | /* If there is no handle, the device node has been unregistered. */ |
a33ec399 | 132 | if (!handle) { |
3757b948 RW |
133 | dev_dbg(&device->dev, "ACPI handle missing\n"); |
134 | put_device(&device->dev); | |
a33ec399 | 135 | return -EINVAL; |
3757b948 RW |
136 | } |
137 | ||
26d46867 | 138 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
0794469d | 139 | "Hot-removing device %s...\n", dev_name(&device->dev))); |
26d46867 | 140 | |
bfee26db | 141 | acpi_bus_trim(device); |
3757b948 RW |
142 | /* Device node has been unregistered. */ |
143 | put_device(&device->dev); | |
b3c450c3 TK |
144 | device = NULL; |
145 | ||
a33ec399 | 146 | if (ACPI_SUCCESS(acpi_get_handle(handle, "_LCK", ¬_used))) { |
1da177e4 LT |
147 | arg_list.count = 1; |
148 | arg_list.pointer = &arg; | |
149 | arg.type = ACPI_TYPE_INTEGER; | |
150 | arg.integer.value = 0; | |
151 | acpi_evaluate_object(handle, "_LCK", &arg_list, NULL); | |
152 | } | |
1da177e4 | 153 | |
1da177e4 LT |
154 | arg_list.count = 1; |
155 | arg_list.pointer = &arg; | |
156 | arg.type = ACPI_TYPE_INTEGER; | |
157 | arg.integer.value = 1; | |
1da177e4 | 158 | |
1da177e4 LT |
159 | /* |
160 | * TBD: _EJD support. | |
161 | */ | |
1da177e4 | 162 | status = acpi_evaluate_object(handle, "_EJ0", &arg_list, NULL); |
c4753e57 | 163 | if (ACPI_FAILURE(status)) { |
a33ec399 RW |
164 | if (status == AE_NOT_FOUND) { |
165 | return -ENODEV; | |
166 | } else { | |
f058cdf4 | 167 | acpi_handle_warn(handle, "Eject failed\n"); |
a33ec399 RW |
168 | return -EIO; |
169 | } | |
170 | } | |
171 | return 0; | |
172 | } | |
1da177e4 | 173 | |
a33ec399 RW |
174 | static void acpi_bus_device_eject(void *context) |
175 | { | |
176 | acpi_handle handle = context; | |
177 | struct acpi_device *device = NULL; | |
178 | struct acpi_scan_handler *handler; | |
179 | u32 ost_code = ACPI_OST_SC_NON_SPECIFIC_FAILURE; | |
180 | ||
181 | mutex_lock(&acpi_scan_lock); | |
182 | ||
183 | acpi_bus_get_device(handle, &device); | |
184 | if (!device) | |
185 | goto err_out; | |
186 | ||
187 | handler = device->handler; | |
188 | if (!handler || !handler->hotplug.enabled) { | |
189 | ost_code = ACPI_OST_SC_EJECT_NOT_SUPPORTED; | |
190 | goto err_out; | |
191 | } | |
192 | acpi_evaluate_hotplug_ost(handle, ACPI_NOTIFY_EJECT_REQUEST, | |
193 | ACPI_OST_SC_EJECT_IN_PROGRESS, NULL); | |
194 | if (handler->hotplug.mode == AHM_CONTAINER) { | |
195 | device->flags.eject_pending = true; | |
196 | kobject_uevent(&device->dev.kobj, KOBJ_OFFLINE); | |
197 | } else { | |
198 | int error; | |
199 | ||
200 | get_device(&device->dev); | |
201 | error = acpi_scan_hot_remove(device); | |
202 | if (error) | |
203 | goto err_out; | |
f058cdf4 | 204 | } |
1da177e4 | 205 | |
3757b948 | 206 | out: |
f058cdf4 | 207 | mutex_unlock(&acpi_scan_lock); |
c8d72a5e | 208 | return; |
a33ec399 RW |
209 | |
210 | err_out: | |
211 | acpi_evaluate_hotplug_ost(handle, ACPI_NOTIFY_EJECT_REQUEST, ost_code, | |
212 | NULL); | |
213 | goto out; | |
214 | } | |
215 | ||
216 | static void acpi_scan_bus_device_check(acpi_handle handle, u32 ost_source) | |
217 | { | |
218 | struct acpi_device *device = NULL; | |
219 | u32 ost_code = ACPI_OST_SC_NON_SPECIFIC_FAILURE; | |
220 | int error; | |
221 | ||
222 | mutex_lock(&acpi_scan_lock); | |
223 | ||
224 | acpi_bus_get_device(handle, &device); | |
225 | if (device) { | |
226 | dev_warn(&device->dev, "Attempt to re-insert\n"); | |
227 | goto out; | |
228 | } | |
229 | acpi_evaluate_hotplug_ost(handle, ost_source, | |
230 | ACPI_OST_SC_INSERT_IN_PROGRESS, NULL); | |
231 | error = acpi_bus_scan(handle); | |
232 | if (error) { | |
233 | acpi_handle_warn(handle, "Namespace scan failure\n"); | |
234 | goto out; | |
235 | } | |
236 | error = acpi_bus_get_device(handle, &device); | |
237 | if (error) { | |
238 | acpi_handle_warn(handle, "Missing device node object\n"); | |
239 | goto out; | |
240 | } | |
241 | ost_code = ACPI_OST_SC_SUCCESS; | |
242 | if (device->handler && device->handler->hotplug.mode == AHM_CONTAINER) | |
243 | kobject_uevent(&device->dev.kobj, KOBJ_ONLINE); | |
244 | ||
245 | out: | |
246 | acpi_evaluate_hotplug_ost(handle, ost_source, ost_code, NULL); | |
247 | mutex_unlock(&acpi_scan_lock); | |
248 | } | |
249 | ||
250 | static void acpi_scan_bus_check(void *context) | |
251 | { | |
252 | acpi_scan_bus_device_check((acpi_handle)context, | |
253 | ACPI_NOTIFY_BUS_CHECK); | |
254 | } | |
255 | ||
256 | static void acpi_scan_device_check(void *context) | |
257 | { | |
258 | acpi_scan_bus_device_check((acpi_handle)context, | |
259 | ACPI_NOTIFY_DEVICE_CHECK); | |
260 | } | |
261 | ||
262 | static void acpi_hotplug_notify_cb(acpi_handle handle, u32 type, void *not_used) | |
263 | { | |
264 | acpi_osd_exec_callback callback; | |
265 | acpi_status status; | |
266 | ||
267 | switch (type) { | |
268 | case ACPI_NOTIFY_BUS_CHECK: | |
269 | acpi_handle_debug(handle, "ACPI_NOTIFY_BUS_CHECK event\n"); | |
270 | callback = acpi_scan_bus_check; | |
271 | break; | |
272 | case ACPI_NOTIFY_DEVICE_CHECK: | |
273 | acpi_handle_debug(handle, "ACPI_NOTIFY_DEVICE_CHECK event\n"); | |
274 | callback = acpi_scan_device_check; | |
275 | break; | |
276 | case ACPI_NOTIFY_EJECT_REQUEST: | |
277 | acpi_handle_debug(handle, "ACPI_NOTIFY_EJECT_REQUEST event\n"); | |
278 | callback = acpi_bus_device_eject; | |
279 | break; | |
280 | default: | |
281 | /* non-hotplug event; possibly handled by other handler */ | |
282 | return; | |
283 | } | |
284 | status = acpi_os_hotplug_execute(callback, handle); | |
285 | if (ACPI_FAILURE(status)) | |
286 | acpi_evaluate_hotplug_ost(handle, type, | |
287 | ACPI_OST_SC_NON_SPECIFIC_FAILURE, | |
288 | NULL); | |
289 | } | |
290 | ||
291 | /** | |
292 | * acpi_bus_hot_remove_device: hot-remove a device and its children | |
293 | * @context: struct acpi_eject_event pointer (freed in this func) | |
294 | * | |
295 | * Hot-remove a device and its children. This function frees up the | |
296 | * memory space passed by arg context, so that the caller may call | |
297 | * this function asynchronously through acpi_os_hotplug_execute(). | |
298 | */ | |
299 | void acpi_bus_hot_remove_device(void *context) | |
300 | { | |
301 | struct acpi_eject_event *ej_event = context; | |
302 | struct acpi_device *device = ej_event->device; | |
303 | acpi_handle handle = device->handle; | |
304 | int error; | |
305 | ||
306 | mutex_lock(&acpi_scan_lock); | |
307 | ||
308 | error = acpi_scan_hot_remove(device); | |
309 | if (error && handle) | |
310 | acpi_evaluate_hotplug_ost(handle, ej_event->event, | |
311 | ACPI_OST_SC_NON_SPECIFIC_FAILURE, | |
312 | NULL); | |
313 | ||
314 | mutex_unlock(&acpi_scan_lock); | |
315 | kfree(context); | |
1da177e4 | 316 | } |
61622acc | 317 | EXPORT_SYMBOL(acpi_bus_hot_remove_device); |
1da177e4 | 318 | |
836aedb1 RW |
319 | static ssize_t real_power_state_show(struct device *dev, |
320 | struct device_attribute *attr, char *buf) | |
321 | { | |
322 | struct acpi_device *adev = to_acpi_device(dev); | |
323 | int state; | |
324 | int ret; | |
325 | ||
326 | ret = acpi_device_get_power(adev, &state); | |
327 | if (ret) | |
328 | return ret; | |
329 | ||
330 | return sprintf(buf, "%s\n", acpi_power_state_string(state)); | |
331 | } | |
332 | ||
333 | static DEVICE_ATTR(real_power_state, 0444, real_power_state_show, NULL); | |
334 | ||
335 | static ssize_t power_state_show(struct device *dev, | |
336 | struct device_attribute *attr, char *buf) | |
337 | { | |
338 | struct acpi_device *adev = to_acpi_device(dev); | |
339 | ||
340 | return sprintf(buf, "%s\n", acpi_power_state_string(adev->power.state)); | |
341 | } | |
342 | ||
343 | static DEVICE_ATTR(power_state, 0444, power_state_show, NULL); | |
344 | ||
1da177e4 | 345 | static ssize_t |
f883d9db PM |
346 | acpi_eject_store(struct device *d, struct device_attribute *attr, |
347 | const char *buf, size_t count) | |
1da177e4 | 348 | { |
f883d9db | 349 | struct acpi_device *acpi_device = to_acpi_device(d); |
c4753e57 | 350 | struct acpi_eject_event *ej_event; |
a33ec399 RW |
351 | acpi_object_type not_used; |
352 | acpi_status status; | |
353 | u32 ost_source; | |
354 | int ret; | |
1da177e4 | 355 | |
a33ec399 | 356 | if (!count || buf[0] != '1') |
1da177e4 | 357 | return -EINVAL; |
1da177e4 | 358 | |
a33ec399 RW |
359 | if ((!acpi_device->handler || !acpi_device->handler->hotplug.enabled) |
360 | && !acpi_device->driver) | |
361 | return -ENODEV; | |
362 | ||
363 | status = acpi_get_type(acpi_device->handle, ¬_used); | |
364 | if (ACPI_FAILURE(status) || !acpi_device->flags.ejectable) | |
365 | return -ENODEV; | |
366 | ||
367 | mutex_lock(&acpi_scan_lock); | |
c4753e57 | 368 | |
c4753e57 | 369 | if (acpi_device->flags.eject_pending) { |
a33ec399 RW |
370 | /* ACPI eject notification event. */ |
371 | ost_source = ACPI_NOTIFY_EJECT_REQUEST; | |
c4753e57 TK |
372 | acpi_device->flags.eject_pending = 0; |
373 | } else { | |
a33ec399 RW |
374 | /* Eject initiated by user space. */ |
375 | ost_source = ACPI_OST_EC_OSPM_EJECT; | |
c4753e57 | 376 | } |
a33ec399 RW |
377 | ej_event = kmalloc(sizeof(*ej_event), GFP_KERNEL); |
378 | if (!ej_event) { | |
379 | ret = -ENOMEM; | |
380 | goto err_out; | |
381 | } | |
382 | acpi_evaluate_hotplug_ost(acpi_device->handle, ost_source, | |
383 | ACPI_OST_SC_EJECT_IN_PROGRESS, NULL); | |
384 | ej_event->device = acpi_device; | |
385 | ej_event->event = ost_source; | |
386 | get_device(&acpi_device->dev); | |
3757b948 RW |
387 | status = acpi_os_hotplug_execute(acpi_bus_hot_remove_device, ej_event); |
388 | if (ACPI_FAILURE(status)) { | |
389 | put_device(&acpi_device->dev); | |
390 | kfree(ej_event); | |
a33ec399 RW |
391 | ret = status == AE_NO_MEMORY ? -ENOMEM : -EAGAIN; |
392 | goto err_out; | |
3757b948 | 393 | } |
a33ec399 RW |
394 | ret = count; |
395 | ||
396 | out: | |
397 | mutex_unlock(&acpi_scan_lock); | |
1da177e4 | 398 | return ret; |
a33ec399 RW |
399 | |
400 | err_out: | |
401 | acpi_evaluate_hotplug_ost(acpi_device->handle, ost_source, | |
402 | ACPI_OST_SC_NON_SPECIFIC_FAILURE, NULL); | |
403 | goto out; | |
1da177e4 LT |
404 | } |
405 | ||
f883d9db | 406 | static DEVICE_ATTR(eject, 0200, NULL, acpi_eject_store); |
1da177e4 | 407 | |
e49bd2dd ZR |
408 | static ssize_t |
409 | acpi_device_hid_show(struct device *dev, struct device_attribute *attr, char *buf) { | |
410 | struct acpi_device *acpi_dev = to_acpi_device(dev); | |
1da177e4 | 411 | |
ea8d82fd | 412 | return sprintf(buf, "%s\n", acpi_device_hid(acpi_dev)); |
1da177e4 | 413 | } |
e49bd2dd | 414 | static DEVICE_ATTR(hid, 0444, acpi_device_hid_show, NULL); |
1da177e4 | 415 | |
923d4a45 LZ |
416 | static ssize_t acpi_device_uid_show(struct device *dev, |
417 | struct device_attribute *attr, char *buf) | |
418 | { | |
419 | struct acpi_device *acpi_dev = to_acpi_device(dev); | |
420 | ||
421 | return sprintf(buf, "%s\n", acpi_dev->pnp.unique_id); | |
422 | } | |
423 | static DEVICE_ATTR(uid, 0444, acpi_device_uid_show, NULL); | |
424 | ||
425 | static ssize_t acpi_device_adr_show(struct device *dev, | |
426 | struct device_attribute *attr, char *buf) | |
427 | { | |
428 | struct acpi_device *acpi_dev = to_acpi_device(dev); | |
429 | ||
430 | return sprintf(buf, "0x%08x\n", | |
431 | (unsigned int)(acpi_dev->pnp.bus_address)); | |
432 | } | |
433 | static DEVICE_ATTR(adr, 0444, acpi_device_adr_show, NULL); | |
434 | ||
e49bd2dd ZR |
435 | static ssize_t |
436 | acpi_device_path_show(struct device *dev, struct device_attribute *attr, char *buf) { | |
437 | struct acpi_device *acpi_dev = to_acpi_device(dev); | |
438 | struct acpi_buffer path = {ACPI_ALLOCATE_BUFFER, NULL}; | |
439 | int result; | |
1da177e4 | 440 | |
e49bd2dd | 441 | result = acpi_get_name(acpi_dev->handle, ACPI_FULL_PATHNAME, &path); |
0c526d96 | 442 | if (result) |
e49bd2dd | 443 | goto end; |
1da177e4 | 444 | |
e49bd2dd ZR |
445 | result = sprintf(buf, "%s\n", (char*)path.pointer); |
446 | kfree(path.pointer); | |
0c526d96 | 447 | end: |
e49bd2dd | 448 | return result; |
1da177e4 | 449 | } |
e49bd2dd | 450 | static DEVICE_ATTR(path, 0444, acpi_device_path_show, NULL); |
1da177e4 | 451 | |
d1efe3c3 LO |
452 | /* sysfs file that shows description text from the ACPI _STR method */ |
453 | static ssize_t description_show(struct device *dev, | |
454 | struct device_attribute *attr, | |
455 | char *buf) { | |
456 | struct acpi_device *acpi_dev = to_acpi_device(dev); | |
457 | int result; | |
458 | ||
459 | if (acpi_dev->pnp.str_obj == NULL) | |
460 | return 0; | |
461 | ||
462 | /* | |
463 | * The _STR object contains a Unicode identifier for a device. | |
464 | * We need to convert to utf-8 so it can be displayed. | |
465 | */ | |
466 | result = utf16s_to_utf8s( | |
467 | (wchar_t *)acpi_dev->pnp.str_obj->buffer.pointer, | |
468 | acpi_dev->pnp.str_obj->buffer.length, | |
469 | UTF16_LITTLE_ENDIAN, buf, | |
470 | PAGE_SIZE); | |
471 | ||
472 | buf[result++] = '\n'; | |
473 | ||
474 | return result; | |
475 | } | |
476 | static DEVICE_ATTR(description, 0444, description_show, NULL); | |
477 | ||
bb74ac23 YI |
478 | static ssize_t |
479 | acpi_device_sun_show(struct device *dev, struct device_attribute *attr, | |
480 | char *buf) { | |
481 | struct acpi_device *acpi_dev = to_acpi_device(dev); | |
482 | ||
483 | return sprintf(buf, "%lu\n", acpi_dev->pnp.sun); | |
484 | } | |
485 | static DEVICE_ATTR(sun, 0444, acpi_device_sun_show, NULL); | |
486 | ||
e49bd2dd | 487 | static int acpi_device_setup_files(struct acpi_device *dev) |
1da177e4 | 488 | { |
d1efe3c3 | 489 | struct acpi_buffer buffer = {ACPI_ALLOCATE_BUFFER, NULL}; |
f883d9db PM |
490 | acpi_status status; |
491 | acpi_handle temp; | |
bb74ac23 | 492 | unsigned long long sun; |
e49bd2dd | 493 | int result = 0; |
1da177e4 LT |
494 | |
495 | /* | |
e49bd2dd | 496 | * Devices gotten from FADT don't have a "path" attribute |
1da177e4 | 497 | */ |
0c526d96 | 498 | if (dev->handle) { |
e49bd2dd | 499 | result = device_create_file(&dev->dev, &dev_attr_path); |
0c526d96 | 500 | if (result) |
e49bd2dd | 501 | goto end; |
1da177e4 LT |
502 | } |
503 | ||
2b2ae7c7 TR |
504 | if (!list_empty(&dev->pnp.ids)) { |
505 | result = device_create_file(&dev->dev, &dev_attr_hid); | |
506 | if (result) | |
507 | goto end; | |
1da177e4 | 508 | |
2b2ae7c7 TR |
509 | result = device_create_file(&dev->dev, &dev_attr_modalias); |
510 | if (result) | |
511 | goto end; | |
512 | } | |
29b71a1c | 513 | |
d1efe3c3 LO |
514 | /* |
515 | * If device has _STR, 'description' file is created | |
516 | */ | |
517 | status = acpi_get_handle(dev->handle, "_STR", &temp); | |
518 | if (ACPI_SUCCESS(status)) { | |
519 | status = acpi_evaluate_object(dev->handle, "_STR", | |
520 | NULL, &buffer); | |
521 | if (ACPI_FAILURE(status)) | |
522 | buffer.pointer = NULL; | |
523 | dev->pnp.str_obj = buffer.pointer; | |
524 | result = device_create_file(&dev->dev, &dev_attr_description); | |
525 | if (result) | |
526 | goto end; | |
527 | } | |
528 | ||
d4e1a692 | 529 | if (dev->pnp.type.bus_address) |
923d4a45 LZ |
530 | result = device_create_file(&dev->dev, &dev_attr_adr); |
531 | if (dev->pnp.unique_id) | |
532 | result = device_create_file(&dev->dev, &dev_attr_uid); | |
533 | ||
bb74ac23 YI |
534 | status = acpi_evaluate_integer(dev->handle, "_SUN", NULL, &sun); |
535 | if (ACPI_SUCCESS(status)) { | |
536 | dev->pnp.sun = (unsigned long)sun; | |
537 | result = device_create_file(&dev->dev, &dev_attr_sun); | |
538 | if (result) | |
539 | goto end; | |
540 | } else { | |
541 | dev->pnp.sun = (unsigned long)-1; | |
542 | } | |
543 | ||
e49bd2dd ZR |
544 | /* |
545 | * If device has _EJ0, 'eject' file is created that is used to trigger | |
546 | * hot-removal function from userland. | |
547 | */ | |
f883d9db | 548 | status = acpi_get_handle(dev->handle, "_EJ0", &temp); |
836aedb1 | 549 | if (ACPI_SUCCESS(status)) { |
e49bd2dd | 550 | result = device_create_file(&dev->dev, &dev_attr_eject); |
836aedb1 RW |
551 | if (result) |
552 | return result; | |
553 | } | |
554 | ||
555 | if (dev->flags.power_manageable) { | |
556 | result = device_create_file(&dev->dev, &dev_attr_power_state); | |
557 | if (result) | |
558 | return result; | |
559 | ||
560 | if (dev->power.flags.power_resources) | |
561 | result = device_create_file(&dev->dev, | |
562 | &dev_attr_real_power_state); | |
563 | } | |
564 | ||
0c526d96 | 565 | end: |
e49bd2dd | 566 | return result; |
1da177e4 LT |
567 | } |
568 | ||
f883d9db | 569 | static void acpi_device_remove_files(struct acpi_device *dev) |
1da177e4 | 570 | { |
f883d9db PM |
571 | acpi_status status; |
572 | acpi_handle temp; | |
1da177e4 | 573 | |
836aedb1 RW |
574 | if (dev->flags.power_manageable) { |
575 | device_remove_file(&dev->dev, &dev_attr_power_state); | |
576 | if (dev->power.flags.power_resources) | |
577 | device_remove_file(&dev->dev, | |
578 | &dev_attr_real_power_state); | |
579 | } | |
580 | ||
f883d9db | 581 | /* |
d1efe3c3 LO |
582 | * If device has _STR, remove 'description' file |
583 | */ | |
584 | status = acpi_get_handle(dev->handle, "_STR", &temp); | |
585 | if (ACPI_SUCCESS(status)) { | |
586 | kfree(dev->pnp.str_obj); | |
587 | device_remove_file(&dev->dev, &dev_attr_description); | |
588 | } | |
589 | /* | |
590 | * If device has _EJ0, remove 'eject' file. | |
f883d9db PM |
591 | */ |
592 | status = acpi_get_handle(dev->handle, "_EJ0", &temp); | |
593 | if (ACPI_SUCCESS(status)) | |
594 | device_remove_file(&dev->dev, &dev_attr_eject); | |
1da177e4 | 595 | |
bb74ac23 YI |
596 | status = acpi_get_handle(dev->handle, "_SUN", &temp); |
597 | if (ACPI_SUCCESS(status)) | |
598 | device_remove_file(&dev->dev, &dev_attr_sun); | |
599 | ||
923d4a45 LZ |
600 | if (dev->pnp.unique_id) |
601 | device_remove_file(&dev->dev, &dev_attr_uid); | |
d4e1a692 | 602 | if (dev->pnp.type.bus_address) |
923d4a45 | 603 | device_remove_file(&dev->dev, &dev_attr_adr); |
1131b938 BH |
604 | device_remove_file(&dev->dev, &dev_attr_modalias); |
605 | device_remove_file(&dev->dev, &dev_attr_hid); | |
0c526d96 | 606 | if (dev->handle) |
e49bd2dd | 607 | device_remove_file(&dev->dev, &dev_attr_path); |
1da177e4 | 608 | } |
1da177e4 | 609 | /* -------------------------------------------------------------------------- |
9e89dde2 | 610 | ACPI Bus operations |
1da177e4 | 611 | -------------------------------------------------------------------------- */ |
29b71a1c | 612 | |
cf761af9 MW |
613 | static const struct acpi_device_id *__acpi_match_device( |
614 | struct acpi_device *device, const struct acpi_device_id *ids) | |
29b71a1c TR |
615 | { |
616 | const struct acpi_device_id *id; | |
7f47fa6c | 617 | struct acpi_hardware_id *hwid; |
29b71a1c | 618 | |
39a0ad87 ZY |
619 | /* |
620 | * If the device is not present, it is unnecessary to load device | |
621 | * driver for it. | |
622 | */ | |
623 | if (!device->status.present) | |
cf761af9 | 624 | return NULL; |
39a0ad87 | 625 | |
7f47fa6c BH |
626 | for (id = ids; id->id[0]; id++) |
627 | list_for_each_entry(hwid, &device->pnp.ids, list) | |
628 | if (!strcmp((char *) id->id, hwid->id)) | |
cf761af9 MW |
629 | return id; |
630 | ||
631 | return NULL; | |
632 | } | |
633 | ||
634 | /** | |
635 | * acpi_match_device - Match a struct device against a given list of ACPI IDs | |
636 | * @ids: Array of struct acpi_device_id object to match against. | |
637 | * @dev: The device structure to match. | |
638 | * | |
639 | * Check if @dev has a valid ACPI handle and if there is a struct acpi_device | |
640 | * object for that handle and use that object to match against a given list of | |
641 | * device IDs. | |
642 | * | |
643 | * Return a pointer to the first matching ID on success or %NULL on failure. | |
644 | */ | |
645 | const struct acpi_device_id *acpi_match_device(const struct acpi_device_id *ids, | |
646 | const struct device *dev) | |
647 | { | |
648 | struct acpi_device *adev; | |
0613e1f7 | 649 | acpi_handle handle = ACPI_HANDLE(dev); |
cf761af9 | 650 | |
0613e1f7 | 651 | if (!ids || !handle || acpi_bus_get_device(handle, &adev)) |
cf761af9 MW |
652 | return NULL; |
653 | ||
654 | return __acpi_match_device(adev, ids); | |
655 | } | |
656 | EXPORT_SYMBOL_GPL(acpi_match_device); | |
29b71a1c | 657 | |
cf761af9 MW |
658 | int acpi_match_device_ids(struct acpi_device *device, |
659 | const struct acpi_device_id *ids) | |
660 | { | |
661 | return __acpi_match_device(device, ids) ? 0 : -ENOENT; | |
29b71a1c TR |
662 | } |
663 | EXPORT_SYMBOL(acpi_match_device_ids); | |
664 | ||
82c7d5ef | 665 | void acpi_free_ids(struct acpi_device *device) |
7f47fa6c BH |
666 | { |
667 | struct acpi_hardware_id *id, *tmp; | |
668 | ||
669 | list_for_each_entry_safe(id, tmp, &device->pnp.ids, list) { | |
670 | kfree(id->id); | |
671 | kfree(id); | |
672 | } | |
d43e167d | 673 | kfree(device->pnp.unique_id); |
7f47fa6c BH |
674 | } |
675 | ||
0b224527 RW |
676 | static void acpi_free_power_resources_lists(struct acpi_device *device) |
677 | { | |
678 | int i; | |
679 | ||
993cbe59 RW |
680 | if (device->wakeup.flags.valid) |
681 | acpi_power_resources_list_free(&device->wakeup.resources); | |
682 | ||
0b224527 RW |
683 | if (!device->flags.power_manageable) |
684 | return; | |
685 | ||
686 | for (i = ACPI_STATE_D0; i <= ACPI_STATE_D3_HOT; i++) { | |
687 | struct acpi_device_power_state *ps = &device->power.states[i]; | |
688 | acpi_power_resources_list_free(&ps->resources); | |
689 | } | |
7f47fa6c BH |
690 | } |
691 | ||
1890a97a | 692 | static void acpi_device_release(struct device *dev) |
1da177e4 | 693 | { |
1890a97a | 694 | struct acpi_device *acpi_dev = to_acpi_device(dev); |
1da177e4 | 695 | |
7f47fa6c | 696 | acpi_free_ids(acpi_dev); |
0b224527 | 697 | acpi_free_power_resources_lists(acpi_dev); |
1890a97a | 698 | kfree(acpi_dev); |
1da177e4 LT |
699 | } |
700 | ||
5d9464a4 | 701 | static int acpi_bus_match(struct device *dev, struct device_driver *drv) |
9e89dde2 | 702 | { |
5d9464a4 PM |
703 | struct acpi_device *acpi_dev = to_acpi_device(dev); |
704 | struct acpi_driver *acpi_drv = to_acpi_driver(drv); | |
1da177e4 | 705 | |
209d3b17 | 706 | return acpi_dev->flags.match_driver |
805d410f | 707 | && !acpi_match_device_ids(acpi_dev, acpi_drv->ids); |
5d9464a4 | 708 | } |
1da177e4 | 709 | |
7eff2e7a | 710 | static int acpi_device_uevent(struct device *dev, struct kobj_uevent_env *env) |
1da177e4 | 711 | { |
5d9464a4 | 712 | struct acpi_device *acpi_dev = to_acpi_device(dev); |
7eff2e7a | 713 | int len; |
5d9464a4 | 714 | |
2b2ae7c7 TR |
715 | if (list_empty(&acpi_dev->pnp.ids)) |
716 | return 0; | |
717 | ||
7eff2e7a KS |
718 | if (add_uevent_var(env, "MODALIAS=")) |
719 | return -ENOMEM; | |
720 | len = create_modalias(acpi_dev, &env->buf[env->buflen - 1], | |
721 | sizeof(env->buf) - env->buflen); | |
722 | if (len >= (sizeof(env->buf) - env->buflen)) | |
723 | return -ENOMEM; | |
724 | env->buflen += len; | |
9e89dde2 | 725 | return 0; |
1da177e4 LT |
726 | } |
727 | ||
46ec8598 BH |
728 | static void acpi_device_notify(acpi_handle handle, u32 event, void *data) |
729 | { | |
730 | struct acpi_device *device = data; | |
731 | ||
732 | device->driver->ops.notify(device, event); | |
733 | } | |
734 | ||
735 | static acpi_status acpi_device_notify_fixed(void *data) | |
736 | { | |
737 | struct acpi_device *device = data; | |
738 | ||
53de5356 BH |
739 | /* Fixed hardware devices have no handles */ |
740 | acpi_device_notify(NULL, ACPI_FIXED_HARDWARE_EVENT, device); | |
46ec8598 BH |
741 | return AE_OK; |
742 | } | |
743 | ||
744 | static int acpi_device_install_notify_handler(struct acpi_device *device) | |
745 | { | |
746 | acpi_status status; | |
46ec8598 | 747 | |
ccba2a36 | 748 | if (device->device_type == ACPI_BUS_TYPE_POWER_BUTTON) |
46ec8598 BH |
749 | status = |
750 | acpi_install_fixed_event_handler(ACPI_EVENT_POWER_BUTTON, | |
751 | acpi_device_notify_fixed, | |
752 | device); | |
ccba2a36 | 753 | else if (device->device_type == ACPI_BUS_TYPE_SLEEP_BUTTON) |
46ec8598 BH |
754 | status = |
755 | acpi_install_fixed_event_handler(ACPI_EVENT_SLEEP_BUTTON, | |
756 | acpi_device_notify_fixed, | |
757 | device); | |
758 | else | |
759 | status = acpi_install_notify_handler(device->handle, | |
760 | ACPI_DEVICE_NOTIFY, | |
761 | acpi_device_notify, | |
762 | device); | |
763 | ||
764 | if (ACPI_FAILURE(status)) | |
765 | return -EINVAL; | |
766 | return 0; | |
767 | } | |
768 | ||
769 | static void acpi_device_remove_notify_handler(struct acpi_device *device) | |
770 | { | |
ccba2a36 | 771 | if (device->device_type == ACPI_BUS_TYPE_POWER_BUTTON) |
46ec8598 BH |
772 | acpi_remove_fixed_event_handler(ACPI_EVENT_POWER_BUTTON, |
773 | acpi_device_notify_fixed); | |
ccba2a36 | 774 | else if (device->device_type == ACPI_BUS_TYPE_SLEEP_BUTTON) |
46ec8598 BH |
775 | acpi_remove_fixed_event_handler(ACPI_EVENT_SLEEP_BUTTON, |
776 | acpi_device_notify_fixed); | |
777 | else | |
778 | acpi_remove_notify_handler(device->handle, ACPI_DEVICE_NOTIFY, | |
779 | acpi_device_notify); | |
780 | } | |
781 | ||
5d9464a4 | 782 | static int acpi_bus_driver_init(struct acpi_device *, struct acpi_driver *); |
5d9464a4 | 783 | static int acpi_device_probe(struct device * dev) |
1da177e4 | 784 | { |
5d9464a4 PM |
785 | struct acpi_device *acpi_dev = to_acpi_device(dev); |
786 | struct acpi_driver *acpi_drv = to_acpi_driver(dev->driver); | |
787 | int ret; | |
788 | ||
789 | ret = acpi_bus_driver_init(acpi_dev, acpi_drv); | |
790 | if (!ret) { | |
46ec8598 BH |
791 | if (acpi_drv->ops.notify) { |
792 | ret = acpi_device_install_notify_handler(acpi_dev); | |
793 | if (ret) { | |
46ec8598 | 794 | if (acpi_drv->ops.remove) |
51fac838 | 795 | acpi_drv->ops.remove(acpi_dev); |
5f27ee8e TK |
796 | acpi_dev->driver = NULL; |
797 | acpi_dev->driver_data = NULL; | |
46ec8598 BH |
798 | return ret; |
799 | } | |
800 | } | |
801 | ||
5d9464a4 PM |
802 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
803 | "Found driver [%s] for device [%s]\n", | |
804 | acpi_drv->name, acpi_dev->pnp.bus_id)); | |
805 | get_device(dev); | |
806 | } | |
807 | return ret; | |
808 | } | |
1da177e4 | 809 | |
5d9464a4 PM |
810 | static int acpi_device_remove(struct device * dev) |
811 | { | |
812 | struct acpi_device *acpi_dev = to_acpi_device(dev); | |
813 | struct acpi_driver *acpi_drv = acpi_dev->driver; | |
814 | ||
815 | if (acpi_drv) { | |
46ec8598 BH |
816 | if (acpi_drv->ops.notify) |
817 | acpi_device_remove_notify_handler(acpi_dev); | |
5d9464a4 | 818 | if (acpi_drv->ops.remove) |
51fac838 | 819 | acpi_drv->ops.remove(acpi_dev); |
1da177e4 | 820 | } |
5d9464a4 | 821 | acpi_dev->driver = NULL; |
db89b4f0 | 822 | acpi_dev->driver_data = NULL; |
1da177e4 | 823 | |
5d9464a4 | 824 | put_device(dev); |
9e89dde2 ZR |
825 | return 0; |
826 | } | |
1da177e4 | 827 | |
55955aad | 828 | struct bus_type acpi_bus_type = { |
9e89dde2 | 829 | .name = "acpi", |
5d9464a4 PM |
830 | .match = acpi_bus_match, |
831 | .probe = acpi_device_probe, | |
832 | .remove = acpi_device_remove, | |
833 | .uevent = acpi_device_uevent, | |
9e89dde2 ZR |
834 | }; |
835 | ||
cf860be6 RW |
836 | int acpi_device_add(struct acpi_device *device, |
837 | void (*release)(struct device *)) | |
1da177e4 | 838 | { |
4be44fcd | 839 | int result; |
e49bd2dd ZR |
840 | struct acpi_device_bus_id *acpi_device_bus_id, *new_bus_id; |
841 | int found = 0; | |
66b7ed40 | 842 | |
d43e167d RW |
843 | if (device->handle) { |
844 | acpi_status status; | |
845 | ||
846 | status = acpi_attach_data(device->handle, acpi_bus_data_handler, | |
847 | device); | |
848 | if (ACPI_FAILURE(status)) { | |
849 | acpi_handle_err(device->handle, | |
850 | "Unable to attach device data\n"); | |
851 | return -ENODEV; | |
852 | } | |
853 | } | |
854 | ||
9e89dde2 ZR |
855 | /* |
856 | * Linkage | |
857 | * ------- | |
858 | * Link this device to its parent and siblings. | |
859 | */ | |
860 | INIT_LIST_HEAD(&device->children); | |
861 | INIT_LIST_HEAD(&device->node); | |
9e89dde2 | 862 | INIT_LIST_HEAD(&device->wakeup_list); |
1033f904 LT |
863 | INIT_LIST_HEAD(&device->physical_node_list); |
864 | mutex_init(&device->physical_node_lock); | |
bc9b6407 | 865 | INIT_LIST_HEAD(&device->power_dependent); |
1da177e4 | 866 | |
e49bd2dd ZR |
867 | new_bus_id = kzalloc(sizeof(struct acpi_device_bus_id), GFP_KERNEL); |
868 | if (!new_bus_id) { | |
d43e167d RW |
869 | pr_err(PREFIX "Memory allocation error\n"); |
870 | result = -ENOMEM; | |
871 | goto err_detach; | |
1da177e4 | 872 | } |
e49bd2dd | 873 | |
9090589d | 874 | mutex_lock(&acpi_device_lock); |
e49bd2dd ZR |
875 | /* |
876 | * Find suitable bus_id and instance number in acpi_bus_id_list | |
877 | * If failed, create one and link it into acpi_bus_id_list | |
878 | */ | |
879 | list_for_each_entry(acpi_device_bus_id, &acpi_bus_id_list, node) { | |
1131b938 BH |
880 | if (!strcmp(acpi_device_bus_id->bus_id, |
881 | acpi_device_hid(device))) { | |
882 | acpi_device_bus_id->instance_no++; | |
e49bd2dd ZR |
883 | found = 1; |
884 | kfree(new_bus_id); | |
885 | break; | |
886 | } | |
1da177e4 | 887 | } |
0c526d96 | 888 | if (!found) { |
e49bd2dd | 889 | acpi_device_bus_id = new_bus_id; |
1131b938 | 890 | strcpy(acpi_device_bus_id->bus_id, acpi_device_hid(device)); |
e49bd2dd ZR |
891 | acpi_device_bus_id->instance_no = 0; |
892 | list_add_tail(&acpi_device_bus_id->node, &acpi_bus_id_list); | |
1da177e4 | 893 | } |
0794469d | 894 | dev_set_name(&device->dev, "%s:%02x", acpi_device_bus_id->bus_id, acpi_device_bus_id->instance_no); |
1da177e4 | 895 | |
33b57150 | 896 | if (device->parent) |
9e89dde2 | 897 | list_add_tail(&device->node, &device->parent->children); |
33b57150 | 898 | |
9e89dde2 ZR |
899 | if (device->wakeup.flags.valid) |
900 | list_add_tail(&device->wakeup_list, &acpi_wakeup_device_list); | |
9090589d | 901 | mutex_unlock(&acpi_device_lock); |
1da177e4 | 902 | |
1890a97a | 903 | if (device->parent) |
66b7ed40 | 904 | device->dev.parent = &device->parent->dev; |
1890a97a | 905 | device->dev.bus = &acpi_bus_type; |
82c7d5ef | 906 | device->dev.release = release; |
cf860be6 | 907 | result = device_add(&device->dev); |
0c526d96 | 908 | if (result) { |
8b12b922 | 909 | dev_err(&device->dev, "Error registering device\n"); |
d43e167d | 910 | goto err; |
1da177e4 | 911 | } |
1da177e4 | 912 | |
e49bd2dd | 913 | result = acpi_device_setup_files(device); |
0c526d96 | 914 | if (result) |
0794469d KS |
915 | printk(KERN_ERR PREFIX "Error creating sysfs interface for device %s\n", |
916 | dev_name(&device->dev)); | |
1da177e4 | 917 | |
96333578 | 918 | device->removal_type = ACPI_BUS_REMOVAL_NORMAL; |
1da177e4 | 919 | return 0; |
d43e167d RW |
920 | |
921 | err: | |
9090589d | 922 | mutex_lock(&acpi_device_lock); |
33b57150 | 923 | if (device->parent) |
e49bd2dd | 924 | list_del(&device->node); |
e49bd2dd | 925 | list_del(&device->wakeup_list); |
9090589d | 926 | mutex_unlock(&acpi_device_lock); |
d43e167d RW |
927 | |
928 | err_detach: | |
929 | acpi_detach_data(device->handle, acpi_bus_data_handler); | |
e49bd2dd | 930 | return result; |
1da177e4 LT |
931 | } |
932 | ||
b17b537a | 933 | static void acpi_device_unregister(struct acpi_device *device) |
9e89dde2 | 934 | { |
9090589d | 935 | mutex_lock(&acpi_device_lock); |
33b57150 | 936 | if (device->parent) |
9e89dde2 | 937 | list_del(&device->node); |
1da177e4 | 938 | |
9e89dde2 | 939 | list_del(&device->wakeup_list); |
9090589d | 940 | mutex_unlock(&acpi_device_lock); |
1da177e4 | 941 | |
9e89dde2 | 942 | acpi_detach_data(device->handle, acpi_bus_data_handler); |
1890a97a | 943 | |
bc9b6407 | 944 | acpi_power_add_remove_device(device, false); |
f883d9db | 945 | acpi_device_remove_files(device); |
b1c0f99b RW |
946 | if (device->remove) |
947 | device->remove(device); | |
948 | ||
cf860be6 | 949 | device_del(&device->dev); |
bc9b6407 | 950 | /* |
0aa120a0 RW |
951 | * Transition the device to D3cold to drop the reference counts of all |
952 | * power resources the device depends on and turn off the ones that have | |
953 | * no more references. | |
bc9b6407 | 954 | */ |
0aa120a0 | 955 | acpi_device_set_power(device, ACPI_STATE_D3_COLD); |
3757b948 | 956 | device->handle = NULL; |
cf860be6 | 957 | put_device(&device->dev); |
1da177e4 LT |
958 | } |
959 | ||
9e89dde2 ZR |
960 | /* -------------------------------------------------------------------------- |
961 | Driver Management | |
962 | -------------------------------------------------------------------------- */ | |
1da177e4 | 963 | /** |
d758a8fa RD |
964 | * acpi_bus_driver_init - add a device to a driver |
965 | * @device: the device to add and initialize | |
966 | * @driver: driver for the device | |
967 | * | |
0c526d96 | 968 | * Used to initialize a device via its device driver. Called whenever a |
1890a97a | 969 | * driver is bound to a device. Invokes the driver's add() ops. |
1da177e4 LT |
970 | */ |
971 | static int | |
4be44fcd | 972 | acpi_bus_driver_init(struct acpi_device *device, struct acpi_driver *driver) |
1da177e4 | 973 | { |
4be44fcd | 974 | int result = 0; |
1da177e4 | 975 | |
1da177e4 | 976 | if (!device || !driver) |
d550d98d | 977 | return -EINVAL; |
1da177e4 LT |
978 | |
979 | if (!driver->ops.add) | |
d550d98d | 980 | return -ENOSYS; |
1da177e4 LT |
981 | |
982 | result = driver->ops.add(device); | |
983 | if (result) { | |
984 | device->driver = NULL; | |
db89b4f0 | 985 | device->driver_data = NULL; |
d550d98d | 986 | return result; |
1da177e4 LT |
987 | } |
988 | ||
989 | device->driver = driver; | |
990 | ||
991 | /* | |
992 | * TBD - Configuration Management: Assign resources to device based | |
993 | * upon possible configuration and currently allocated resources. | |
994 | */ | |
995 | ||
4be44fcd LB |
996 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
997 | "Driver successfully bound to device\n")); | |
d550d98d | 998 | return 0; |
3fb02738 RS |
999 | } |
1000 | ||
9e89dde2 ZR |
1001 | /** |
1002 | * acpi_bus_register_driver - register a driver with the ACPI bus | |
1003 | * @driver: driver being registered | |
1004 | * | |
1005 | * Registers a driver with the ACPI bus. Searches the namespace for all | |
1006 | * devices that match the driver's criteria and binds. Returns zero for | |
1007 | * success or a negative error status for failure. | |
1008 | */ | |
1009 | int acpi_bus_register_driver(struct acpi_driver *driver) | |
1da177e4 | 1010 | { |
1890a97a | 1011 | int ret; |
1da177e4 | 1012 | |
9e89dde2 ZR |
1013 | if (acpi_disabled) |
1014 | return -ENODEV; | |
1890a97a PM |
1015 | driver->drv.name = driver->name; |
1016 | driver->drv.bus = &acpi_bus_type; | |
1017 | driver->drv.owner = driver->owner; | |
1da177e4 | 1018 | |
1890a97a PM |
1019 | ret = driver_register(&driver->drv); |
1020 | return ret; | |
9e89dde2 | 1021 | } |
1da177e4 | 1022 | |
9e89dde2 ZR |
1023 | EXPORT_SYMBOL(acpi_bus_register_driver); |
1024 | ||
1025 | /** | |
1026 | * acpi_bus_unregister_driver - unregisters a driver with the APIC bus | |
1027 | * @driver: driver to unregister | |
1028 | * | |
1029 | * Unregisters a driver with the ACPI bus. Searches the namespace for all | |
1030 | * devices that match the driver's criteria and unbinds. | |
1031 | */ | |
1032 | void acpi_bus_unregister_driver(struct acpi_driver *driver) | |
1033 | { | |
1890a97a | 1034 | driver_unregister(&driver->drv); |
9e89dde2 ZR |
1035 | } |
1036 | ||
1037 | EXPORT_SYMBOL(acpi_bus_unregister_driver); | |
1038 | ||
9e89dde2 ZR |
1039 | /* -------------------------------------------------------------------------- |
1040 | Device Enumeration | |
1041 | -------------------------------------------------------------------------- */ | |
5c478f49 BH |
1042 | static struct acpi_device *acpi_bus_get_parent(acpi_handle handle) |
1043 | { | |
456de893 | 1044 | struct acpi_device *device = NULL; |
5c478f49 | 1045 | acpi_status status; |
5c478f49 BH |
1046 | |
1047 | /* | |
1048 | * Fixed hardware devices do not appear in the namespace and do not | |
1049 | * have handles, but we fabricate acpi_devices for them, so we have | |
1050 | * to deal with them specially. | |
1051 | */ | |
456de893 | 1052 | if (!handle) |
5c478f49 BH |
1053 | return acpi_root; |
1054 | ||
1055 | do { | |
1056 | status = acpi_get_parent(handle, &handle); | |
5c478f49 | 1057 | if (ACPI_FAILURE(status)) |
456de893 RW |
1058 | return status == AE_NULL_ENTRY ? NULL : acpi_root; |
1059 | } while (acpi_bus_get_device(handle, &device)); | |
1060 | return device; | |
5c478f49 BH |
1061 | } |
1062 | ||
9e89dde2 ZR |
1063 | acpi_status |
1064 | acpi_bus_get_ejd(acpi_handle handle, acpi_handle *ejd) | |
1065 | { | |
1066 | acpi_status status; | |
1067 | acpi_handle tmp; | |
1068 | struct acpi_buffer buffer = {ACPI_ALLOCATE_BUFFER, NULL}; | |
1069 | union acpi_object *obj; | |
1070 | ||
1071 | status = acpi_get_handle(handle, "_EJD", &tmp); | |
1072 | if (ACPI_FAILURE(status)) | |
1073 | return status; | |
1074 | ||
1075 | status = acpi_evaluate_object(handle, "_EJD", NULL, &buffer); | |
1076 | if (ACPI_SUCCESS(status)) { | |
1077 | obj = buffer.pointer; | |
3b5fee59 HM |
1078 | status = acpi_get_handle(ACPI_ROOT_OBJECT, obj->string.pointer, |
1079 | ejd); | |
9e89dde2 ZR |
1080 | kfree(buffer.pointer); |
1081 | } | |
1082 | return status; | |
1083 | } | |
1084 | EXPORT_SYMBOL_GPL(acpi_bus_get_ejd); | |
1085 | ||
8e4319c4 | 1086 | void acpi_bus_data_handler(acpi_handle handle, void *context) |
9e89dde2 ZR |
1087 | { |
1088 | ||
1089 | /* TBD */ | |
1090 | ||
1091 | return; | |
1092 | } | |
1093 | ||
e88c9c60 RW |
1094 | static int acpi_bus_extract_wakeup_device_power_package(acpi_handle handle, |
1095 | struct acpi_device_wakeup *wakeup) | |
9e89dde2 | 1096 | { |
b581a7f9 RW |
1097 | struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; |
1098 | union acpi_object *package = NULL; | |
9e89dde2 | 1099 | union acpi_object *element = NULL; |
b581a7f9 | 1100 | acpi_status status; |
e88c9c60 | 1101 | int err = -ENODATA; |
9e89dde2 | 1102 | |
b581a7f9 | 1103 | if (!wakeup) |
e88c9c60 | 1104 | return -EINVAL; |
9e89dde2 | 1105 | |
993cbe59 | 1106 | INIT_LIST_HEAD(&wakeup->resources); |
9e89dde2 | 1107 | |
b581a7f9 RW |
1108 | /* _PRW */ |
1109 | status = acpi_evaluate_object(handle, "_PRW", NULL, &buffer); | |
1110 | if (ACPI_FAILURE(status)) { | |
1111 | ACPI_EXCEPTION((AE_INFO, status, "Evaluating _PRW")); | |
e88c9c60 | 1112 | return err; |
b581a7f9 RW |
1113 | } |
1114 | ||
1115 | package = (union acpi_object *)buffer.pointer; | |
1116 | ||
e88c9c60 | 1117 | if (!package || package->package.count < 2) |
b581a7f9 | 1118 | goto out; |
b581a7f9 | 1119 | |
9e89dde2 | 1120 | element = &(package->package.elements[0]); |
e88c9c60 | 1121 | if (!element) |
b581a7f9 | 1122 | goto out; |
e88c9c60 | 1123 | |
9e89dde2 ZR |
1124 | if (element->type == ACPI_TYPE_PACKAGE) { |
1125 | if ((element->package.count < 2) || | |
1126 | (element->package.elements[0].type != | |
1127 | ACPI_TYPE_LOCAL_REFERENCE) | |
e88c9c60 | 1128 | || (element->package.elements[1].type != ACPI_TYPE_INTEGER)) |
b581a7f9 | 1129 | goto out; |
e88c9c60 | 1130 | |
b581a7f9 | 1131 | wakeup->gpe_device = |
9e89dde2 | 1132 | element->package.elements[0].reference.handle; |
b581a7f9 | 1133 | wakeup->gpe_number = |
9e89dde2 ZR |
1134 | (u32) element->package.elements[1].integer.value; |
1135 | } else if (element->type == ACPI_TYPE_INTEGER) { | |
b581a7f9 RW |
1136 | wakeup->gpe_device = NULL; |
1137 | wakeup->gpe_number = element->integer.value; | |
1138 | } else { | |
b581a7f9 RW |
1139 | goto out; |
1140 | } | |
9e89dde2 ZR |
1141 | |
1142 | element = &(package->package.elements[1]); | |
e88c9c60 | 1143 | if (element->type != ACPI_TYPE_INTEGER) |
b581a7f9 | 1144 | goto out; |
e88c9c60 | 1145 | |
b581a7f9 | 1146 | wakeup->sleep_state = element->integer.value; |
9e89dde2 | 1147 | |
e88c9c60 RW |
1148 | err = acpi_extract_power_resources(package, 2, &wakeup->resources); |
1149 | if (err) | |
b581a7f9 | 1150 | goto out; |
9e89dde2 | 1151 | |
0596a52b RW |
1152 | if (!list_empty(&wakeup->resources)) { |
1153 | int sleep_state; | |
9e89dde2 | 1154 | |
b5d667eb RW |
1155 | err = acpi_power_wakeup_list_init(&wakeup->resources, |
1156 | &sleep_state); | |
1157 | if (err) { | |
1158 | acpi_handle_warn(handle, "Retrieving current states " | |
1159 | "of wakeup power resources failed\n"); | |
1160 | acpi_power_resources_list_free(&wakeup->resources); | |
1161 | goto out; | |
1162 | } | |
0596a52b RW |
1163 | if (sleep_state < wakeup->sleep_state) { |
1164 | acpi_handle_warn(handle, "Overriding _PRW sleep state " | |
1165 | "(S%d) by S%d from power resources\n", | |
1166 | (int)wakeup->sleep_state, sleep_state); | |
1167 | wakeup->sleep_state = sleep_state; | |
1168 | } | |
1169 | } | |
bba63a29 | 1170 | acpi_setup_gpe_for_wake(handle, wakeup->gpe_device, wakeup->gpe_number); |
9874647b | 1171 | |
b581a7f9 RW |
1172 | out: |
1173 | kfree(buffer.pointer); | |
e88c9c60 | 1174 | return err; |
1da177e4 LT |
1175 | } |
1176 | ||
f517709d | 1177 | static void acpi_bus_set_run_wake_flags(struct acpi_device *device) |
1da177e4 | 1178 | { |
29b71a1c | 1179 | struct acpi_device_id button_device_ids[] = { |
29b71a1c | 1180 | {"PNP0C0C", 0}, |
b7e38304 | 1181 | {"PNP0C0D", 0}, |
29b71a1c TR |
1182 | {"PNP0C0E", 0}, |
1183 | {"", 0}, | |
1184 | }; | |
f517709d RW |
1185 | acpi_status status; |
1186 | acpi_event_status event_status; | |
1187 | ||
b67ea761 | 1188 | device->wakeup.flags.notifier_present = 0; |
f517709d RW |
1189 | |
1190 | /* Power button, Lid switch always enable wakeup */ | |
1191 | if (!acpi_match_device_ids(device, button_device_ids)) { | |
1192 | device->wakeup.flags.run_wake = 1; | |
b7e38304 ZR |
1193 | if (!acpi_match_device_ids(device, &button_device_ids[1])) { |
1194 | /* Do not use Lid/sleep button for S5 wakeup */ | |
1195 | if (device->wakeup.sleep_state == ACPI_STATE_S5) | |
1196 | device->wakeup.sleep_state = ACPI_STATE_S4; | |
1197 | } | |
f2b56bc8 | 1198 | device_set_wakeup_capable(&device->dev, true); |
f517709d RW |
1199 | return; |
1200 | } | |
1201 | ||
e8e18c95 RW |
1202 | status = acpi_get_gpe_status(device->wakeup.gpe_device, |
1203 | device->wakeup.gpe_number, | |
1204 | &event_status); | |
f517709d RW |
1205 | if (status == AE_OK) |
1206 | device->wakeup.flags.run_wake = | |
1207 | !!(event_status & ACPI_EVENT_FLAG_HANDLE); | |
1208 | } | |
1209 | ||
d57d09a4 | 1210 | static void acpi_bus_get_wakeup_device_flags(struct acpi_device *device) |
f517709d | 1211 | { |
d57d09a4 | 1212 | acpi_handle temp; |
f517709d | 1213 | acpi_status status = 0; |
e88c9c60 | 1214 | int err; |
29b71a1c | 1215 | |
d57d09a4 RW |
1216 | /* Presence of _PRW indicates wake capable */ |
1217 | status = acpi_get_handle(device->handle, "_PRW", &temp); | |
1218 | if (ACPI_FAILURE(status)) | |
1219 | return; | |
1220 | ||
e88c9c60 RW |
1221 | err = acpi_bus_extract_wakeup_device_power_package(device->handle, |
1222 | &device->wakeup); | |
1223 | if (err) { | |
1224 | dev_err(&device->dev, "_PRW evaluation error: %d\n", err); | |
d57d09a4 | 1225 | return; |
9e89dde2 | 1226 | } |
1da177e4 | 1227 | |
9e89dde2 | 1228 | device->wakeup.flags.valid = 1; |
9b83ccd2 | 1229 | device->wakeup.prepare_count = 0; |
f517709d | 1230 | acpi_bus_set_run_wake_flags(device); |
729b2bdb ZY |
1231 | /* Call _PSW/_DSW object to disable its ability to wake the sleeping |
1232 | * system for the ACPI device with the _PRW object. | |
1233 | * The _PSW object is depreciated in ACPI 3.0 and is replaced by _DSW. | |
1234 | * So it is necessary to call _DSW object first. Only when it is not | |
1235 | * present will the _PSW object used. | |
1236 | */ | |
e88c9c60 RW |
1237 | err = acpi_device_sleep_wake(device, 0, 0, 0); |
1238 | if (err) | |
77e76609 RW |
1239 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
1240 | "error in _DSW or _PSW evaluation\n")); | |
1da177e4 | 1241 | } |
1da177e4 | 1242 | |
f33ce568 RW |
1243 | static void acpi_bus_init_power_state(struct acpi_device *device, int state) |
1244 | { | |
1245 | struct acpi_device_power_state *ps = &device->power.states[state]; | |
ef85bdbe RW |
1246 | char pathname[5] = { '_', 'P', 'R', '0' + state, '\0' }; |
1247 | struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; | |
f33ce568 RW |
1248 | acpi_handle handle; |
1249 | acpi_status status; | |
bf325f95 | 1250 | |
f33ce568 RW |
1251 | INIT_LIST_HEAD(&ps->resources); |
1252 | ||
ef85bdbe RW |
1253 | /* Evaluate "_PRx" to get referenced power resources */ |
1254 | status = acpi_evaluate_object(device->handle, pathname, NULL, &buffer); | |
1255 | if (ACPI_SUCCESS(status)) { | |
1256 | union acpi_object *package = buffer.pointer; | |
1257 | ||
1258 | if (buffer.length && package | |
1259 | && package->type == ACPI_TYPE_PACKAGE | |
1260 | && package->package.count) { | |
e88c9c60 RW |
1261 | int err = acpi_extract_power_resources(package, 0, |
1262 | &ps->resources); | |
1263 | if (!err) | |
ef85bdbe | 1264 | device->power.flags.power_resources = 1; |
f33ce568 | 1265 | } |
ef85bdbe | 1266 | ACPI_FREE(buffer.pointer); |
f33ce568 RW |
1267 | } |
1268 | ||
1269 | /* Evaluate "_PSx" to see if we can do explicit sets */ | |
ef85bdbe RW |
1270 | pathname[2] = 'S'; |
1271 | status = acpi_get_handle(device->handle, pathname, &handle); | |
f33ce568 RW |
1272 | if (ACPI_SUCCESS(status)) |
1273 | ps->flags.explicit_set = 1; | |
1274 | ||
1275 | /* | |
1276 | * State is valid if there are means to put the device into it. | |
1277 | * D3hot is only valid if _PR3 present. | |
1278 | */ | |
ef85bdbe | 1279 | if (!list_empty(&ps->resources) |
f33ce568 RW |
1280 | || (ps->flags.explicit_set && state < ACPI_STATE_D3_HOT)) { |
1281 | ps->flags.valid = 1; | |
1282 | ps->flags.os_accessible = 1; | |
1283 | } | |
1284 | ||
1285 | ps->power = -1; /* Unknown - driver assigned */ | |
1286 | ps->latency = -1; /* Unknown - driver assigned */ | |
1287 | } | |
1288 | ||
d43e167d | 1289 | static void acpi_bus_get_power_flags(struct acpi_device *device) |
1da177e4 | 1290 | { |
8bc5053b RW |
1291 | acpi_status status; |
1292 | acpi_handle handle; | |
1293 | u32 i; | |
1a365616 | 1294 | |
d43e167d RW |
1295 | /* Presence of _PS0|_PR0 indicates 'power manageable' */ |
1296 | status = acpi_get_handle(device->handle, "_PS0", &handle); | |
1297 | if (ACPI_FAILURE(status)) { | |
1298 | status = acpi_get_handle(device->handle, "_PR0", &handle); | |
1299 | if (ACPI_FAILURE(status)) | |
1300 | return; | |
1301 | } | |
1a365616 | 1302 | |
d43e167d | 1303 | device->flags.power_manageable = 1; |
4be44fcd | 1304 | |
9e89dde2 ZR |
1305 | /* |
1306 | * Power Management Flags | |
1307 | */ | |
1308 | status = acpi_get_handle(device->handle, "_PSC", &handle); | |
1309 | if (ACPI_SUCCESS(status)) | |
1310 | device->power.flags.explicit_get = 1; | |
1311 | status = acpi_get_handle(device->handle, "_IRC", &handle); | |
1312 | if (ACPI_SUCCESS(status)) | |
1313 | device->power.flags.inrush_current = 1; | |
1da177e4 | 1314 | |
9e89dde2 ZR |
1315 | /* |
1316 | * Enumerate supported power management states | |
1317 | */ | |
f33ce568 RW |
1318 | for (i = ACPI_STATE_D0; i <= ACPI_STATE_D3_HOT; i++) |
1319 | acpi_bus_init_power_state(device, i); | |
bf325f95 | 1320 | |
0b224527 | 1321 | INIT_LIST_HEAD(&device->power.states[ACPI_STATE_D3_COLD].resources); |
1da177e4 | 1322 | |
9e89dde2 ZR |
1323 | /* Set defaults for D0 and D3 states (always valid) */ |
1324 | device->power.states[ACPI_STATE_D0].flags.valid = 1; | |
1325 | device->power.states[ACPI_STATE_D0].power = 100; | |
1326 | device->power.states[ACPI_STATE_D3].flags.valid = 1; | |
1327 | device->power.states[ACPI_STATE_D3].power = 0; | |
c8f7a62c | 1328 | |
5c7dd710 RW |
1329 | /* Set D3cold's explicit_set flag if _PS3 exists. */ |
1330 | if (device->power.states[ACPI_STATE_D3_HOT].flags.explicit_set) | |
1331 | device->power.states[ACPI_STATE_D3_COLD].flags.explicit_set = 1; | |
1332 | ||
1399dfcd AL |
1333 | /* Presence of _PS3 or _PRx means we can put the device into D3 cold */ |
1334 | if (device->power.states[ACPI_STATE_D3_HOT].flags.explicit_set || | |
1335 | device->power.flags.power_resources) | |
1336 | device->power.states[ACPI_STATE_D3_COLD].flags.os_accessible = 1; | |
1337 | ||
b3785492 RW |
1338 | if (acpi_bus_init_power(device)) { |
1339 | acpi_free_power_resources_lists(device); | |
1340 | device->flags.power_manageable = 0; | |
1341 | } | |
9e89dde2 | 1342 | } |
c8f7a62c | 1343 | |
d43e167d | 1344 | static void acpi_bus_get_flags(struct acpi_device *device) |
1da177e4 | 1345 | { |
4be44fcd LB |
1346 | acpi_status status = AE_OK; |
1347 | acpi_handle temp = NULL; | |
1da177e4 | 1348 | |
1da177e4 LT |
1349 | /* Presence of _STA indicates 'dynamic_status' */ |
1350 | status = acpi_get_handle(device->handle, "_STA", &temp); | |
1351 | if (ACPI_SUCCESS(status)) | |
1352 | device->flags.dynamic_status = 1; | |
1353 | ||
1da177e4 LT |
1354 | /* Presence of _RMV indicates 'removable' */ |
1355 | status = acpi_get_handle(device->handle, "_RMV", &temp); | |
1356 | if (ACPI_SUCCESS(status)) | |
1357 | device->flags.removable = 1; | |
1358 | ||
1359 | /* Presence of _EJD|_EJ0 indicates 'ejectable' */ | |
1360 | status = acpi_get_handle(device->handle, "_EJD", &temp); | |
1361 | if (ACPI_SUCCESS(status)) | |
1362 | device->flags.ejectable = 1; | |
1363 | else { | |
1364 | status = acpi_get_handle(device->handle, "_EJ0", &temp); | |
1365 | if (ACPI_SUCCESS(status)) | |
1366 | device->flags.ejectable = 1; | |
1367 | } | |
1da177e4 LT |
1368 | } |
1369 | ||
c7bcb4e9 | 1370 | static void acpi_device_get_busid(struct acpi_device *device) |
1da177e4 | 1371 | { |
4be44fcd LB |
1372 | char bus_id[5] = { '?', 0 }; |
1373 | struct acpi_buffer buffer = { sizeof(bus_id), bus_id }; | |
1374 | int i = 0; | |
1da177e4 LT |
1375 | |
1376 | /* | |
1377 | * Bus ID | |
1378 | * ------ | |
1379 | * The device's Bus ID is simply the object name. | |
1380 | * TBD: Shouldn't this value be unique (within the ACPI namespace)? | |
1381 | */ | |
859ac9a4 | 1382 | if (ACPI_IS_ROOT_DEVICE(device)) { |
1da177e4 | 1383 | strcpy(device->pnp.bus_id, "ACPI"); |
859ac9a4 BH |
1384 | return; |
1385 | } | |
1386 | ||
1387 | switch (device->device_type) { | |
1da177e4 LT |
1388 | case ACPI_BUS_TYPE_POWER_BUTTON: |
1389 | strcpy(device->pnp.bus_id, "PWRF"); | |
1390 | break; | |
1391 | case ACPI_BUS_TYPE_SLEEP_BUTTON: | |
1392 | strcpy(device->pnp.bus_id, "SLPF"); | |
1393 | break; | |
1394 | default: | |
66b7ed40 | 1395 | acpi_get_name(device->handle, ACPI_SINGLE_NAME, &buffer); |
1da177e4 LT |
1396 | /* Clean up trailing underscores (if any) */ |
1397 | for (i = 3; i > 1; i--) { | |
1398 | if (bus_id[i] == '_') | |
1399 | bus_id[i] = '\0'; | |
1400 | else | |
1401 | break; | |
1402 | } | |
1403 | strcpy(device->pnp.bus_id, bus_id); | |
1404 | break; | |
1405 | } | |
1406 | } | |
1407 | ||
54735266 | 1408 | /* |
d4e1a692 | 1409 | * acpi_bay_match - see if an acpi object is an ejectable driver bay |
54735266 ZR |
1410 | * |
1411 | * If an acpi object is ejectable and has one of the ACPI ATA methods defined, | |
1412 | * then we can safely call it an ejectable drive bay | |
1413 | */ | |
d4e1a692 TK |
1414 | static int acpi_bay_match(acpi_handle handle) |
1415 | { | |
54735266 | 1416 | acpi_status status; |
54735266 ZR |
1417 | acpi_handle tmp; |
1418 | acpi_handle phandle; | |
1419 | ||
54735266 ZR |
1420 | status = acpi_get_handle(handle, "_EJ0", &tmp); |
1421 | if (ACPI_FAILURE(status)) | |
1422 | return -ENODEV; | |
1423 | ||
1424 | if ((ACPI_SUCCESS(acpi_get_handle(handle, "_GTF", &tmp))) || | |
1425 | (ACPI_SUCCESS(acpi_get_handle(handle, "_GTM", &tmp))) || | |
1426 | (ACPI_SUCCESS(acpi_get_handle(handle, "_STM", &tmp))) || | |
1427 | (ACPI_SUCCESS(acpi_get_handle(handle, "_SDD", &tmp)))) | |
1428 | return 0; | |
1429 | ||
1430 | if (acpi_get_parent(handle, &phandle)) | |
1431 | return -ENODEV; | |
1432 | ||
1433 | if ((ACPI_SUCCESS(acpi_get_handle(phandle, "_GTF", &tmp))) || | |
1434 | (ACPI_SUCCESS(acpi_get_handle(phandle, "_GTM", &tmp))) || | |
1435 | (ACPI_SUCCESS(acpi_get_handle(phandle, "_STM", &tmp))) || | |
1436 | (ACPI_SUCCESS(acpi_get_handle(phandle, "_SDD", &tmp)))) | |
1437 | return 0; | |
1438 | ||
1439 | return -ENODEV; | |
1440 | } | |
1441 | ||
3620f2f2 | 1442 | /* |
d4e1a692 | 1443 | * acpi_dock_match - see if an acpi object has a _DCK method |
3620f2f2 | 1444 | */ |
d4e1a692 | 1445 | static int acpi_dock_match(acpi_handle handle) |
3620f2f2 FS |
1446 | { |
1447 | acpi_handle tmp; | |
d4e1a692 | 1448 | return acpi_get_handle(handle, "_DCK", &tmp); |
3620f2f2 FS |
1449 | } |
1450 | ||
620e112c | 1451 | const char *acpi_device_hid(struct acpi_device *device) |
15b8dd53 | 1452 | { |
7f47fa6c | 1453 | struct acpi_hardware_id *hid; |
15b8dd53 | 1454 | |
2b2ae7c7 TR |
1455 | if (list_empty(&device->pnp.ids)) |
1456 | return dummy_hid; | |
1457 | ||
7f47fa6c BH |
1458 | hid = list_first_entry(&device->pnp.ids, struct acpi_hardware_id, list); |
1459 | return hid->id; | |
1460 | } | |
1461 | EXPORT_SYMBOL(acpi_device_hid); | |
15b8dd53 | 1462 | |
d4e1a692 | 1463 | static void acpi_add_id(struct acpi_device_pnp *pnp, const char *dev_id) |
7f47fa6c BH |
1464 | { |
1465 | struct acpi_hardware_id *id; | |
15b8dd53 | 1466 | |
7f47fa6c BH |
1467 | id = kmalloc(sizeof(*id), GFP_KERNEL); |
1468 | if (!id) | |
1469 | return; | |
15b8dd53 | 1470 | |
581de59e | 1471 | id->id = kstrdup(dev_id, GFP_KERNEL); |
7f47fa6c BH |
1472 | if (!id->id) { |
1473 | kfree(id); | |
1474 | return; | |
15b8dd53 BM |
1475 | } |
1476 | ||
d4e1a692 TK |
1477 | list_add_tail(&id->list, &pnp->ids); |
1478 | pnp->type.hardware_id = 1; | |
15b8dd53 BM |
1479 | } |
1480 | ||
222e82ac DW |
1481 | /* |
1482 | * Old IBM workstations have a DSDT bug wherein the SMBus object | |
1483 | * lacks the SMBUS01 HID and the methods do not have the necessary "_" | |
1484 | * prefix. Work around this. | |
1485 | */ | |
d4e1a692 | 1486 | static int acpi_ibm_smbus_match(acpi_handle handle) |
222e82ac DW |
1487 | { |
1488 | acpi_handle h_dummy; | |
1489 | struct acpi_buffer path = {ACPI_ALLOCATE_BUFFER, NULL}; | |
1490 | int result; | |
1491 | ||
1492 | if (!dmi_name_in_vendors("IBM")) | |
1493 | return -ENODEV; | |
1494 | ||
1495 | /* Look for SMBS object */ | |
d4e1a692 | 1496 | result = acpi_get_name(handle, ACPI_SINGLE_NAME, &path); |
222e82ac DW |
1497 | if (result) |
1498 | return result; | |
1499 | ||
1500 | if (strcmp("SMBS", path.pointer)) { | |
1501 | result = -ENODEV; | |
1502 | goto out; | |
1503 | } | |
1504 | ||
1505 | /* Does it have the necessary (but misnamed) methods? */ | |
1506 | result = -ENODEV; | |
d4e1a692 TK |
1507 | if (ACPI_SUCCESS(acpi_get_handle(handle, "SBI", &h_dummy)) && |
1508 | ACPI_SUCCESS(acpi_get_handle(handle, "SBR", &h_dummy)) && | |
1509 | ACPI_SUCCESS(acpi_get_handle(handle, "SBW", &h_dummy))) | |
222e82ac DW |
1510 | result = 0; |
1511 | out: | |
1512 | kfree(path.pointer); | |
1513 | return result; | |
1514 | } | |
1515 | ||
c7bcb4e9 | 1516 | static void acpi_device_set_id(struct acpi_device *device) |
1da177e4 | 1517 | { |
4be44fcd | 1518 | acpi_status status; |
57f3674f | 1519 | struct acpi_device_info *info; |
78e25fef | 1520 | struct acpi_pnp_device_id_list *cid_list; |
7f47fa6c | 1521 | int i; |
1da177e4 | 1522 | |
c7bcb4e9 | 1523 | switch (device->device_type) { |
1da177e4 | 1524 | case ACPI_BUS_TYPE_DEVICE: |
859ac9a4 | 1525 | if (ACPI_IS_ROOT_DEVICE(device)) { |
d4e1a692 | 1526 | acpi_add_id(&device->pnp, ACPI_SYSTEM_HID); |
859ac9a4 BH |
1527 | break; |
1528 | } | |
1529 | ||
66b7ed40 | 1530 | status = acpi_get_object_info(device->handle, &info); |
1da177e4 | 1531 | if (ACPI_FAILURE(status)) { |
96b2dd1f | 1532 | printk(KERN_ERR PREFIX "%s: Error reading device info\n", __func__); |
1da177e4 LT |
1533 | return; |
1534 | } | |
1535 | ||
1da177e4 | 1536 | if (info->valid & ACPI_VALID_HID) |
d4e1a692 | 1537 | acpi_add_id(&device->pnp, info->hardware_id.string); |
57f3674f | 1538 | if (info->valid & ACPI_VALID_CID) { |
15b8dd53 | 1539 | cid_list = &info->compatible_id_list; |
57f3674f | 1540 | for (i = 0; i < cid_list->count; i++) |
d4e1a692 | 1541 | acpi_add_id(&device->pnp, cid_list->ids[i].string); |
57f3674f | 1542 | } |
1da177e4 LT |
1543 | if (info->valid & ACPI_VALID_ADR) { |
1544 | device->pnp.bus_address = info->address; | |
d4e1a692 | 1545 | device->pnp.type.bus_address = 1; |
1da177e4 | 1546 | } |
ccf78040 LZ |
1547 | if (info->valid & ACPI_VALID_UID) |
1548 | device->pnp.unique_id = kstrdup(info->unique_id.string, | |
1549 | GFP_KERNEL); | |
ae843332 | 1550 | |
a83893ae BH |
1551 | kfree(info); |
1552 | ||
57f3674f BH |
1553 | /* |
1554 | * Some devices don't reliably have _HIDs & _CIDs, so add | |
1555 | * synthetic HIDs to make sure drivers can find them. | |
1556 | */ | |
d4e1a692 TK |
1557 | if (acpi_is_video_device(device->handle)) |
1558 | acpi_add_id(&device->pnp, ACPI_VIDEO_HID); | |
1559 | else if (ACPI_SUCCESS(acpi_bay_match(device->handle))) | |
1560 | acpi_add_id(&device->pnp, ACPI_BAY_HID); | |
1561 | else if (ACPI_SUCCESS(acpi_dock_match(device->handle))) | |
1562 | acpi_add_id(&device->pnp, ACPI_DOCK_HID); | |
1563 | else if (!acpi_ibm_smbus_match(device->handle)) | |
1564 | acpi_add_id(&device->pnp, ACPI_SMBUS_IBM_HID); | |
4f5f64cf | 1565 | else if (list_empty(&device->pnp.ids) && |
b7b30de5 | 1566 | ACPI_IS_ROOT_DEVICE(device->parent)) { |
d4e1a692 | 1567 | acpi_add_id(&device->pnp, ACPI_BUS_HID); /* \_SB, LNXSYBUS */ |
b7b30de5 BH |
1568 | strcpy(device->pnp.device_name, ACPI_BUS_DEVICE_NAME); |
1569 | strcpy(device->pnp.device_class, ACPI_BUS_CLASS); | |
1570 | } | |
54735266 | 1571 | |
1da177e4 LT |
1572 | break; |
1573 | case ACPI_BUS_TYPE_POWER: | |
d4e1a692 | 1574 | acpi_add_id(&device->pnp, ACPI_POWER_HID); |
1da177e4 LT |
1575 | break; |
1576 | case ACPI_BUS_TYPE_PROCESSOR: | |
d4e1a692 | 1577 | acpi_add_id(&device->pnp, ACPI_PROCESSOR_OBJECT_HID); |
1da177e4 | 1578 | break; |
1da177e4 | 1579 | case ACPI_BUS_TYPE_THERMAL: |
d4e1a692 | 1580 | acpi_add_id(&device->pnp, ACPI_THERMAL_HID); |
1da177e4 LT |
1581 | break; |
1582 | case ACPI_BUS_TYPE_POWER_BUTTON: | |
d4e1a692 | 1583 | acpi_add_id(&device->pnp, ACPI_BUTTON_HID_POWERF); |
1da177e4 LT |
1584 | break; |
1585 | case ACPI_BUS_TYPE_SLEEP_BUTTON: | |
d4e1a692 | 1586 | acpi_add_id(&device->pnp, ACPI_BUTTON_HID_SLEEPF); |
1da177e4 LT |
1587 | break; |
1588 | } | |
1da177e4 LT |
1589 | } |
1590 | ||
82c7d5ef RW |
1591 | void acpi_init_device_object(struct acpi_device *device, acpi_handle handle, |
1592 | int type, unsigned long long sta) | |
1da177e4 | 1593 | { |
d43e167d RW |
1594 | INIT_LIST_HEAD(&device->pnp.ids); |
1595 | device->device_type = type; | |
1596 | device->handle = handle; | |
1597 | device->parent = acpi_bus_get_parent(handle); | |
1598 | STRUCT_TO_INT(device->status) = sta; | |
1599 | acpi_device_get_busid(device); | |
1600 | acpi_device_set_id(device); | |
1601 | acpi_bus_get_flags(device); | |
2c0d4fe0 | 1602 | device->flags.match_driver = false; |
cf860be6 RW |
1603 | device_initialize(&device->dev); |
1604 | dev_set_uevent_suppress(&device->dev, true); | |
1605 | } | |
bc3b0772 | 1606 | |
cf860be6 RW |
1607 | void acpi_device_add_finalize(struct acpi_device *device) |
1608 | { | |
2c0d4fe0 | 1609 | device->flags.match_driver = true; |
cf860be6 RW |
1610 | dev_set_uevent_suppress(&device->dev, false); |
1611 | kobject_uevent(&device->dev.kobj, KOBJ_ADD); | |
1da177e4 LT |
1612 | } |
1613 | ||
5c478f49 BH |
1614 | static int acpi_add_single_object(struct acpi_device **child, |
1615 | acpi_handle handle, int type, | |
2c0d4fe0 | 1616 | unsigned long long sta) |
1da177e4 | 1617 | { |
77c24888 BH |
1618 | int result; |
1619 | struct acpi_device *device; | |
29aaefa6 | 1620 | struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; |
1da177e4 | 1621 | |
36bcbec7 | 1622 | device = kzalloc(sizeof(struct acpi_device), GFP_KERNEL); |
1da177e4 | 1623 | if (!device) { |
6468463a | 1624 | printk(KERN_ERR PREFIX "Memory allocation error\n"); |
d550d98d | 1625 | return -ENOMEM; |
1da177e4 | 1626 | } |
1da177e4 | 1627 | |
d43e167d RW |
1628 | acpi_init_device_object(device, handle, type, sta); |
1629 | acpi_bus_get_power_flags(device); | |
d57d09a4 | 1630 | acpi_bus_get_wakeup_device_flags(device); |
1da177e4 | 1631 | |
cf860be6 | 1632 | result = acpi_device_add(device, acpi_device_release); |
d43e167d | 1633 | if (result) { |
718fb0de | 1634 | acpi_device_release(&device->dev); |
d43e167d RW |
1635 | return result; |
1636 | } | |
1da177e4 | 1637 | |
d43e167d | 1638 | acpi_power_add_remove_device(device, true); |
cf860be6 | 1639 | acpi_device_add_finalize(device); |
d43e167d RW |
1640 | acpi_get_name(handle, ACPI_FULL_PATHNAME, &buffer); |
1641 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Added %s [%s] parent %s\n", | |
1642 | dev_name(&device->dev), (char *) buffer.pointer, | |
1643 | device->parent ? dev_name(&device->parent->dev) : "(null)")); | |
1644 | kfree(buffer.pointer); | |
1645 | *child = device; | |
1646 | return 0; | |
bf325f95 RW |
1647 | } |
1648 | ||
778cbc1d BH |
1649 | static int acpi_bus_type_and_status(acpi_handle handle, int *type, |
1650 | unsigned long long *sta) | |
1da177e4 | 1651 | { |
778cbc1d BH |
1652 | acpi_status status; |
1653 | acpi_object_type acpi_type; | |
1da177e4 | 1654 | |
778cbc1d | 1655 | status = acpi_get_type(handle, &acpi_type); |
51a85faf | 1656 | if (ACPI_FAILURE(status)) |
778cbc1d | 1657 | return -ENODEV; |
4be44fcd | 1658 | |
778cbc1d | 1659 | switch (acpi_type) { |
51a85faf BH |
1660 | case ACPI_TYPE_ANY: /* for ACPI_ROOT_OBJECT */ |
1661 | case ACPI_TYPE_DEVICE: | |
778cbc1d BH |
1662 | *type = ACPI_BUS_TYPE_DEVICE; |
1663 | status = acpi_bus_get_status_handle(handle, sta); | |
1664 | if (ACPI_FAILURE(status)) | |
1665 | return -ENODEV; | |
51a85faf BH |
1666 | break; |
1667 | case ACPI_TYPE_PROCESSOR: | |
778cbc1d BH |
1668 | *type = ACPI_BUS_TYPE_PROCESSOR; |
1669 | status = acpi_bus_get_status_handle(handle, sta); | |
1670 | if (ACPI_FAILURE(status)) | |
1671 | return -ENODEV; | |
51a85faf BH |
1672 | break; |
1673 | case ACPI_TYPE_THERMAL: | |
778cbc1d BH |
1674 | *type = ACPI_BUS_TYPE_THERMAL; |
1675 | *sta = ACPI_STA_DEFAULT; | |
51a85faf BH |
1676 | break; |
1677 | case ACPI_TYPE_POWER: | |
778cbc1d BH |
1678 | *type = ACPI_BUS_TYPE_POWER; |
1679 | *sta = ACPI_STA_DEFAULT; | |
51a85faf BH |
1680 | break; |
1681 | default: | |
778cbc1d | 1682 | return -ENODEV; |
51a85faf | 1683 | } |
1da177e4 | 1684 | |
778cbc1d BH |
1685 | return 0; |
1686 | } | |
1687 | ||
4b59cc1f RW |
1688 | static bool acpi_scan_handler_matching(struct acpi_scan_handler *handler, |
1689 | char *idstr, | |
1690 | const struct acpi_device_id **matchid) | |
1691 | { | |
1692 | const struct acpi_device_id *devid; | |
1693 | ||
1694 | for (devid = handler->ids; devid->id[0]; devid++) | |
1695 | if (!strcmp((char *)devid->id, idstr)) { | |
1696 | if (matchid) | |
1697 | *matchid = devid; | |
1698 | ||
1699 | return true; | |
1700 | } | |
1701 | ||
1702 | return false; | |
1703 | } | |
1704 | ||
3f8055c3 RW |
1705 | static acpi_status acpi_scan_hotplug_modify(acpi_handle handle, |
1706 | u32 lvl_not_used, void *data, | |
1707 | void **ret_not_used) | |
1708 | { | |
1709 | struct acpi_scan_handler *handler = data; | |
1710 | struct acpi_device_info *info; | |
1711 | bool match = false; | |
1712 | ||
1713 | if (ACPI_FAILURE(acpi_get_object_info(handle, &info))) | |
1714 | return AE_OK; | |
1715 | ||
1716 | if (info->valid & ACPI_VALID_HID) { | |
1717 | char *idstr = info->hardware_id.string; | |
1718 | match = acpi_scan_handler_matching(handler, idstr, NULL); | |
1719 | } | |
1720 | kfree(info); | |
1721 | if (!match) | |
1722 | return AE_OK; | |
1723 | ||
1724 | if (handler->hotplug.enabled) | |
1725 | acpi_install_notify_handler(handle, ACPI_SYSTEM_NOTIFY, | |
1726 | acpi_hotplug_notify_cb, NULL); | |
1727 | else | |
1728 | acpi_remove_notify_handler(handle, ACPI_SYSTEM_NOTIFY, | |
1729 | acpi_hotplug_notify_cb); | |
1730 | ||
1731 | return AE_OK; | |
1732 | } | |
1733 | ||
1734 | void acpi_scan_hotplug_enabled(struct acpi_hotplug_profile *hotplug, bool val) | |
1735 | { | |
1736 | struct acpi_scan_handler *handler; | |
1737 | ||
1738 | if (!!hotplug->enabled == !!val) | |
1739 | return; | |
1740 | ||
1741 | mutex_lock(&acpi_scan_lock); | |
1742 | ||
1743 | hotplug->enabled = val; | |
1744 | handler = container_of(hotplug, struct acpi_scan_handler, hotplug); | |
1745 | acpi_walk_namespace(ACPI_TYPE_DEVICE, ACPI_ROOT_OBJECT, ACPI_UINT32_MAX, | |
1746 | acpi_scan_hotplug_modify, NULL, handler, NULL); | |
1747 | ||
1748 | mutex_unlock(&acpi_scan_lock); | |
1749 | } | |
1750 | ||
c5698074 RW |
1751 | static struct acpi_scan_handler *acpi_scan_match_handler(char *idstr, |
1752 | const struct acpi_device_id **matchid) | |
1753 | { | |
1754 | struct acpi_scan_handler *handler; | |
1755 | ||
4b59cc1f RW |
1756 | list_for_each_entry(handler, &acpi_scan_handlers_list, list_node) |
1757 | if (acpi_scan_handler_matching(handler, idstr, matchid)) | |
1758 | return handler; | |
c5698074 | 1759 | |
c5698074 RW |
1760 | return NULL; |
1761 | } | |
1762 | ||
a33ec399 RW |
1763 | static void acpi_scan_init_hotplug(acpi_handle handle) |
1764 | { | |
1765 | struct acpi_device_info *info; | |
1766 | struct acpi_scan_handler *handler; | |
1767 | ||
1768 | if (ACPI_FAILURE(acpi_get_object_info(handle, &info))) | |
1769 | return; | |
1770 | ||
1771 | if (!(info->valid & ACPI_VALID_HID)) { | |
1772 | kfree(info); | |
1773 | return; | |
1774 | } | |
1775 | ||
1776 | /* | |
1777 | * This relies on the fact that acpi_install_notify_handler() will not | |
1778 | * install the same notify handler routine twice for the same handle. | |
1779 | */ | |
1780 | handler = acpi_scan_match_handler(info->hardware_id.string, NULL); | |
1781 | kfree(info); | |
1782 | if (handler && handler->hotplug.enabled) | |
1783 | acpi_install_notify_handler(handle, ACPI_SYSTEM_NOTIFY, | |
1784 | acpi_hotplug_notify_cb, NULL); | |
1785 | } | |
1786 | ||
e3863094 RW |
1787 | static acpi_status acpi_bus_check_add(acpi_handle handle, u32 lvl_not_used, |
1788 | void *not_used, void **return_value) | |
778cbc1d | 1789 | { |
805d410f | 1790 | struct acpi_device *device = NULL; |
778cbc1d BH |
1791 | int type; |
1792 | unsigned long long sta; | |
e3b87f8a | 1793 | acpi_status status; |
778cbc1d BH |
1794 | int result; |
1795 | ||
4002bf38 RW |
1796 | acpi_bus_get_device(handle, &device); |
1797 | if (device) | |
1798 | goto out; | |
1799 | ||
778cbc1d BH |
1800 | result = acpi_bus_type_and_status(handle, &type, &sta); |
1801 | if (result) | |
1802 | return AE_OK; | |
1803 | ||
82c7d5ef RW |
1804 | if (type == ACPI_BUS_TYPE_POWER) { |
1805 | acpi_add_power_resource(handle); | |
1806 | return AE_OK; | |
1807 | } | |
1808 | ||
a33ec399 RW |
1809 | acpi_scan_init_hotplug(handle); |
1810 | ||
778cbc1d | 1811 | if (!(sta & ACPI_STA_DEVICE_PRESENT) && |
b581a7f9 | 1812 | !(sta & ACPI_STA_DEVICE_FUNCTIONING)) { |
86e4e20e RW |
1813 | struct acpi_device_wakeup wakeup; |
1814 | acpi_handle temp; | |
1815 | ||
1816 | status = acpi_get_handle(handle, "_PRW", &temp); | |
993cbe59 | 1817 | if (ACPI_SUCCESS(status)) { |
86e4e20e RW |
1818 | acpi_bus_extract_wakeup_device_power_package(handle, |
1819 | &wakeup); | |
993cbe59 RW |
1820 | acpi_power_resources_list_free(&wakeup.resources); |
1821 | } | |
778cbc1d | 1822 | return AE_CTRL_DEPTH; |
b581a7f9 | 1823 | } |
778cbc1d | 1824 | |
2c0d4fe0 | 1825 | acpi_add_single_object(&device, handle, type, sta); |
e3b87f8a | 1826 | if (!device) |
51a85faf | 1827 | return AE_CTRL_DEPTH; |
1da177e4 | 1828 | |
4002bf38 | 1829 | out: |
51a85faf BH |
1830 | if (!*return_value) |
1831 | *return_value = device; | |
805d410f | 1832 | |
51a85faf BH |
1833 | return AE_OK; |
1834 | } | |
3fb02738 | 1835 | |
c5698074 | 1836 | static int acpi_scan_attach_handler(struct acpi_device *device) |
ca589f94 | 1837 | { |
c5698074 RW |
1838 | struct acpi_hardware_id *hwid; |
1839 | int ret = 0; | |
ca589f94 | 1840 | |
c5698074 | 1841 | list_for_each_entry(hwid, &device->pnp.ids, list) { |
87b85b3c | 1842 | const struct acpi_device_id *devid; |
c5698074 | 1843 | struct acpi_scan_handler *handler; |
ca589f94 | 1844 | |
c5698074 RW |
1845 | handler = acpi_scan_match_handler(hwid->id, &devid); |
1846 | if (handler) { | |
87b85b3c RW |
1847 | ret = handler->attach(device, devid); |
1848 | if (ret > 0) { | |
1849 | device->handler = handler; | |
c5698074 | 1850 | break; |
87b85b3c | 1851 | } else if (ret < 0) { |
c5698074 | 1852 | break; |
87b85b3c | 1853 | } |
ca589f94 RW |
1854 | } |
1855 | } | |
1856 | return ret; | |
1857 | } | |
1858 | ||
0fc300b0 RW |
1859 | static acpi_status acpi_bus_device_attach(acpi_handle handle, u32 lvl_not_used, |
1860 | void *not_used, void **ret_not_used) | |
51a85faf | 1861 | { |
805d410f RW |
1862 | struct acpi_device *device; |
1863 | unsigned long long sta_not_used; | |
ca589f94 | 1864 | int ret; |
3fb02738 | 1865 | |
805d410f RW |
1866 | /* |
1867 | * Ignore errors ignored by acpi_bus_check_add() to avoid terminating | |
1868 | * namespace walks prematurely. | |
1869 | */ | |
ca589f94 | 1870 | if (acpi_bus_type_and_status(handle, &ret, &sta_not_used)) |
805d410f | 1871 | return AE_OK; |
1da177e4 | 1872 | |
805d410f RW |
1873 | if (acpi_bus_get_device(handle, &device)) |
1874 | return AE_CTRL_DEPTH; | |
7779688f | 1875 | |
ca589f94 RW |
1876 | ret = acpi_scan_attach_handler(device); |
1877 | if (ret) | |
1878 | return ret > 0 ? AE_OK : AE_CTRL_DEPTH; | |
1879 | ||
1880 | ret = device_attach(&device->dev); | |
1881 | return ret >= 0 ? AE_OK : AE_CTRL_DEPTH; | |
1da177e4 | 1882 | } |
1da177e4 | 1883 | |
636458de | 1884 | /** |
b8bd759a | 1885 | * acpi_bus_scan - Add ACPI device node objects in a given namespace scope. |
636458de | 1886 | * @handle: Root of the namespace scope to scan. |
7779688f | 1887 | * |
636458de RW |
1888 | * Scan a given ACPI tree (probably recently hot-plugged) and create and add |
1889 | * found devices. | |
7779688f | 1890 | * |
636458de RW |
1891 | * If no devices were found, -ENODEV is returned, but it does not mean that |
1892 | * there has been a real error. There just have been no suitable ACPI objects | |
1893 | * in the table trunk from which the kernel could create a device and add an | |
1894 | * appropriate driver. | |
3757b948 RW |
1895 | * |
1896 | * Must be called under acpi_scan_lock. | |
7779688f | 1897 | */ |
b8bd759a | 1898 | int acpi_bus_scan(acpi_handle handle) |
3fb02738 | 1899 | { |
b8bd759a | 1900 | void *device = NULL; |
c511cc19 | 1901 | int error = 0; |
3fb02738 | 1902 | |
b8bd759a RW |
1903 | if (ACPI_SUCCESS(acpi_bus_check_add(handle, 0, NULL, &device))) |
1904 | acpi_walk_namespace(ACPI_TYPE_ANY, handle, ACPI_UINT32_MAX, | |
1905 | acpi_bus_check_add, NULL, NULL, &device); | |
3fb02738 | 1906 | |
d2f6650a | 1907 | if (!device) |
c511cc19 RW |
1908 | error = -ENODEV; |
1909 | else if (ACPI_SUCCESS(acpi_bus_device_attach(handle, 0, NULL, NULL))) | |
b8bd759a RW |
1910 | acpi_walk_namespace(ACPI_TYPE_ANY, handle, ACPI_UINT32_MAX, |
1911 | acpi_bus_device_attach, NULL, NULL, NULL); | |
3fb02738 | 1912 | |
c511cc19 | 1913 | return error; |
3fb02738 | 1914 | } |
b8bd759a | 1915 | EXPORT_SYMBOL(acpi_bus_scan); |
a2100801 | 1916 | |
05404d8f RW |
1917 | static acpi_status acpi_bus_device_detach(acpi_handle handle, u32 lvl_not_used, |
1918 | void *not_used, void **ret_not_used) | |
1919 | { | |
1920 | struct acpi_device *device = NULL; | |
a2100801 | 1921 | |
05404d8f | 1922 | if (!acpi_bus_get_device(handle, &device)) { |
ca589f94 RW |
1923 | struct acpi_scan_handler *dev_handler = device->handler; |
1924 | ||
05404d8f | 1925 | device->removal_type = ACPI_BUS_REMOVAL_EJECT; |
ca589f94 RW |
1926 | if (dev_handler) { |
1927 | if (dev_handler->detach) | |
1928 | dev_handler->detach(device); | |
1929 | ||
1930 | device->handler = NULL; | |
1931 | } else { | |
1932 | device_release_driver(&device->dev); | |
1933 | } | |
05404d8f RW |
1934 | } |
1935 | return AE_OK; | |
3fb02738 | 1936 | } |
1da177e4 | 1937 | |
05404d8f RW |
1938 | static acpi_status acpi_bus_remove(acpi_handle handle, u32 lvl_not_used, |
1939 | void *not_used, void **ret_not_used) | |
1da177e4 | 1940 | { |
05404d8f | 1941 | struct acpi_device *device = NULL; |
4be44fcd | 1942 | |
05404d8f RW |
1943 | if (!acpi_bus_get_device(handle, &device)) |
1944 | acpi_device_unregister(device); | |
1da177e4 | 1945 | |
05404d8f RW |
1946 | return AE_OK; |
1947 | } | |
1da177e4 | 1948 | |
3757b948 RW |
1949 | /** |
1950 | * acpi_bus_trim - Remove ACPI device node and all of its descendants | |
1951 | * @start: Root of the ACPI device nodes subtree to remove. | |
1952 | * | |
1953 | * Must be called under acpi_scan_lock. | |
1954 | */ | |
bfee26db | 1955 | void acpi_bus_trim(struct acpi_device *start) |
1da177e4 | 1956 | { |
05404d8f RW |
1957 | /* |
1958 | * Execute acpi_bus_device_detach() as a post-order callback to detach | |
1959 | * all ACPI drivers from the device nodes being removed. | |
1960 | */ | |
1961 | acpi_walk_namespace(ACPI_TYPE_ANY, start->handle, ACPI_UINT32_MAX, NULL, | |
1962 | acpi_bus_device_detach, NULL, NULL); | |
1963 | acpi_bus_device_detach(start->handle, 0, NULL, NULL); | |
cecdb193 RW |
1964 | /* |
1965 | * Execute acpi_bus_remove() as a post-order callback to remove device | |
1966 | * nodes in the given namespace scope. | |
1967 | */ | |
1968 | acpi_walk_namespace(ACPI_TYPE_ANY, start->handle, ACPI_UINT32_MAX, NULL, | |
1969 | acpi_bus_remove, NULL, NULL); | |
1970 | acpi_bus_remove(start->handle, 0, NULL, NULL); | |
1da177e4 | 1971 | } |
ceaba663 KA |
1972 | EXPORT_SYMBOL_GPL(acpi_bus_trim); |
1973 | ||
e8b945c9 | 1974 | static int acpi_bus_scan_fixed(void) |
1da177e4 | 1975 | { |
4be44fcd | 1976 | int result = 0; |
c4168bff | 1977 | |
1da177e4 LT |
1978 | /* |
1979 | * Enumerate all fixed-feature devices. | |
1980 | */ | |
2c0d4fe0 RW |
1981 | if (!(acpi_gbl_FADT.flags & ACPI_FADT_POWER_BUTTON)) { |
1982 | struct acpi_device *device = NULL; | |
1983 | ||
5c478f49 | 1984 | result = acpi_add_single_object(&device, NULL, |
c4168bff | 1985 | ACPI_BUS_TYPE_POWER_BUTTON, |
2c0d4fe0 RW |
1986 | ACPI_STA_DEFAULT); |
1987 | if (result) | |
1988 | return result; | |
1989 | ||
1990 | result = device_attach(&device->dev); | |
1991 | if (result < 0) | |
1992 | return result; | |
1993 | ||
c10d7a13 | 1994 | device_init_wakeup(&device->dev, true); |
3fb02738 | 1995 | } |
1da177e4 | 1996 | |
2c0d4fe0 RW |
1997 | if (!(acpi_gbl_FADT.flags & ACPI_FADT_SLEEP_BUTTON)) { |
1998 | struct acpi_device *device = NULL; | |
1999 | ||
5c478f49 | 2000 | result = acpi_add_single_object(&device, NULL, |
c4168bff | 2001 | ACPI_BUS_TYPE_SLEEP_BUTTON, |
2c0d4fe0 RW |
2002 | ACPI_STA_DEFAULT); |
2003 | if (result) | |
2004 | return result; | |
2005 | ||
2006 | result = device_attach(&device->dev); | |
3fb02738 | 2007 | } |
1da177e4 | 2008 | |
2c0d4fe0 | 2009 | return result < 0 ? result : 0; |
1da177e4 LT |
2010 | } |
2011 | ||
e747f274 | 2012 | int __init acpi_scan_init(void) |
1da177e4 LT |
2013 | { |
2014 | int result; | |
1da177e4 | 2015 | |
5b327265 PM |
2016 | result = bus_register(&acpi_bus_type); |
2017 | if (result) { | |
2018 | /* We don't want to quit even if we failed to add suspend/resume */ | |
2019 | printk(KERN_ERR PREFIX "Could not register bus type\n"); | |
2020 | } | |
2021 | ||
92ef2a25 | 2022 | acpi_pci_root_init(); |
4daeaf68 | 2023 | acpi_pci_link_init(); |
141a297b | 2024 | acpi_platform_init(); |
13176bbf | 2025 | acpi_csrt_init(); |
737f1a9f | 2026 | acpi_container_init(); |
ab1a2e03 | 2027 | acpi_pci_slot_init(); |
0a347644 | 2028 | acpi_memory_hotplug_init(); |
97d9a9e9 | 2029 | |
3757b948 | 2030 | mutex_lock(&acpi_scan_lock); |
1da177e4 LT |
2031 | /* |
2032 | * Enumerate devices in the ACPI namespace. | |
2033 | */ | |
0cd6ac52 RW |
2034 | result = acpi_bus_scan(ACPI_ROOT_OBJECT); |
2035 | if (result) | |
3757b948 | 2036 | goto out; |
1da177e4 | 2037 | |
0cd6ac52 | 2038 | result = acpi_bus_get_device(ACPI_ROOT_OBJECT, &acpi_root); |
1da177e4 | 2039 | if (result) |
3757b948 | 2040 | goto out; |
1da177e4 | 2041 | |
b8bd759a RW |
2042 | result = acpi_bus_scan_fixed(); |
2043 | if (result) { | |
b17b537a | 2044 | acpi_device_unregister(acpi_root); |
3757b948 | 2045 | goto out; |
b8bd759a | 2046 | } |
1da177e4 | 2047 | |
b8bd759a | 2048 | acpi_update_all_gpes(); |
3757b948 | 2049 | |
668192b6 YL |
2050 | acpi_pci_root_hp_init(); |
2051 | ||
3757b948 RW |
2052 | out: |
2053 | mutex_unlock(&acpi_scan_lock); | |
2054 | return result; | |
1da177e4 | 2055 | } |