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Commit | Line | Data |
---|---|---|
1da177e4 LT |
1 | /* |
2 | * scan.c - support for transforming the ACPI namespace into individual objects | |
3 | */ | |
4 | ||
5 | #include <linux/module.h> | |
6 | #include <linux/init.h> | |
5a0e3ad6 | 7 | #include <linux/slab.h> |
9b6d97b6 | 8 | #include <linux/kernel.h> |
1da177e4 | 9 | #include <linux/acpi.h> |
74523c90 AK |
10 | #include <linux/signal.h> |
11 | #include <linux/kthread.h> | |
222e82ac | 12 | #include <linux/dmi.h> |
d1efe3c3 | 13 | #include <linux/nls.h> |
1da177e4 LT |
14 | |
15 | #include <acpi/acpi_drivers.h> | |
1da177e4 | 16 | |
e60cc7a6 BH |
17 | #include "internal.h" |
18 | ||
1da177e4 | 19 | #define _COMPONENT ACPI_BUS_COMPONENT |
f52fd66d | 20 | ACPI_MODULE_NAME("scan"); |
1da177e4 | 21 | #define STRUCT_TO_INT(s) (*((int*)&s)) |
4be44fcd | 22 | extern struct acpi_device *acpi_root; |
1da177e4 LT |
23 | |
24 | #define ACPI_BUS_CLASS "system_bus" | |
29b71a1c | 25 | #define ACPI_BUS_HID "LNXSYBUS" |
1da177e4 LT |
26 | #define ACPI_BUS_DEVICE_NAME "System Bus" |
27 | ||
859ac9a4 BH |
28 | #define ACPI_IS_ROOT_DEVICE(device) (!(device)->parent) |
29 | ||
683058e3 RW |
30 | /* |
31 | * If set, devices will be hot-removed even if they cannot be put offline | |
32 | * gracefully (from the kernel's standpoint). | |
33 | */ | |
34 | bool acpi_force_hot_remove; | |
35 | ||
620e112c | 36 | static const char *dummy_hid = "device"; |
2b2ae7c7 | 37 | |
e49bd2dd | 38 | static LIST_HEAD(acpi_bus_id_list); |
c511cc19 | 39 | static DEFINE_MUTEX(acpi_scan_lock); |
ca589f94 | 40 | static LIST_HEAD(acpi_scan_handlers_list); |
9090589d | 41 | DEFINE_MUTEX(acpi_device_lock); |
1da177e4 LT |
42 | LIST_HEAD(acpi_wakeup_device_list); |
43 | ||
e49bd2dd | 44 | struct acpi_device_bus_id{ |
bb095854 | 45 | char bus_id[15]; |
e49bd2dd ZR |
46 | unsigned int instance_no; |
47 | struct list_head node; | |
1da177e4 | 48 | }; |
29b71a1c | 49 | |
3757b948 RW |
50 | void acpi_scan_lock_acquire(void) |
51 | { | |
52 | mutex_lock(&acpi_scan_lock); | |
53 | } | |
54 | EXPORT_SYMBOL_GPL(acpi_scan_lock_acquire); | |
55 | ||
56 | void acpi_scan_lock_release(void) | |
57 | { | |
58 | mutex_unlock(&acpi_scan_lock); | |
59 | } | |
60 | EXPORT_SYMBOL_GPL(acpi_scan_lock_release); | |
61 | ||
ca589f94 RW |
62 | int acpi_scan_add_handler(struct acpi_scan_handler *handler) |
63 | { | |
64 | if (!handler || !handler->attach) | |
65 | return -EINVAL; | |
66 | ||
67 | list_add_tail(&handler->list_node, &acpi_scan_handlers_list); | |
68 | return 0; | |
69 | } | |
70 | ||
3f8055c3 RW |
71 | int acpi_scan_add_handler_with_hotplug(struct acpi_scan_handler *handler, |
72 | const char *hotplug_profile_name) | |
73 | { | |
74 | int error; | |
75 | ||
76 | error = acpi_scan_add_handler(handler); | |
77 | if (error) | |
78 | return error; | |
79 | ||
80 | acpi_sysfs_add_hotplug_profile(&handler->hotplug, hotplug_profile_name); | |
81 | return 0; | |
82 | } | |
83 | ||
29b71a1c TR |
84 | /* |
85 | * Creates hid/cid(s) string needed for modalias and uevent | |
86 | * e.g. on a device with hid:IBM0001 and cid:ACPI0001 you get: | |
87 | * char *modalias: "acpi:IBM0001:ACPI0001" | |
88 | */ | |
b3e572d2 AB |
89 | static int create_modalias(struct acpi_device *acpi_dev, char *modalias, |
90 | int size) | |
91 | { | |
29b71a1c | 92 | int len; |
5c9fcb5d | 93 | int count; |
7f47fa6c | 94 | struct acpi_hardware_id *id; |
29b71a1c | 95 | |
2b2ae7c7 TR |
96 | if (list_empty(&acpi_dev->pnp.ids)) |
97 | return 0; | |
98 | ||
5c9fcb5d | 99 | len = snprintf(modalias, size, "acpi:"); |
29b71a1c TR |
100 | size -= len; |
101 | ||
7f47fa6c BH |
102 | list_for_each_entry(id, &acpi_dev->pnp.ids, list) { |
103 | count = snprintf(&modalias[len], size, "%s:", id->id); | |
5c9fcb5d ZR |
104 | if (count < 0 || count >= size) |
105 | return -EINVAL; | |
106 | len += count; | |
107 | size -= count; | |
108 | } | |
109 | ||
29b71a1c TR |
110 | modalias[len] = '\0'; |
111 | return len; | |
112 | } | |
113 | ||
114 | static ssize_t | |
115 | acpi_device_modalias_show(struct device *dev, struct device_attribute *attr, char *buf) { | |
116 | struct acpi_device *acpi_dev = to_acpi_device(dev); | |
117 | int len; | |
118 | ||
119 | /* Device has no HID and no CID or string is >1024 */ | |
120 | len = create_modalias(acpi_dev, buf, 1024); | |
121 | if (len <= 0) | |
122 | return 0; | |
123 | buf[len++] = '\n'; | |
124 | return len; | |
125 | } | |
126 | static DEVICE_ATTR(modalias, 0444, acpi_device_modalias_show, NULL); | |
127 | ||
7f28ddec RW |
128 | static acpi_status acpi_bus_offline(acpi_handle handle, u32 lvl, void *data, |
129 | void **ret_p) | |
683058e3 RW |
130 | { |
131 | struct acpi_device *device = NULL; | |
132 | struct acpi_device_physical_node *pn; | |
303bfdb1 | 133 | bool second_pass = (bool)data; |
683058e3 RW |
134 | acpi_status status = AE_OK; |
135 | ||
136 | if (acpi_bus_get_device(handle, &device)) | |
137 | return AE_OK; | |
138 | ||
7f28ddec RW |
139 | if (device->handler && !device->handler->hotplug.enabled) { |
140 | *ret_p = &device->dev; | |
141 | return AE_SUPPORT; | |
142 | } | |
143 | ||
683058e3 RW |
144 | mutex_lock(&device->physical_node_lock); |
145 | ||
146 | list_for_each_entry(pn, &device->physical_node_list, node) { | |
147 | int ret; | |
148 | ||
303bfdb1 RW |
149 | if (second_pass) { |
150 | /* Skip devices offlined by the first pass. */ | |
151 | if (pn->put_online) | |
152 | continue; | |
153 | } else { | |
154 | pn->put_online = false; | |
155 | } | |
683058e3 RW |
156 | ret = device_offline(pn->dev); |
157 | if (acpi_force_hot_remove) | |
158 | continue; | |
159 | ||
303bfdb1 RW |
160 | if (ret >= 0) { |
161 | pn->put_online = !ret; | |
162 | } else { | |
163 | *ret_p = pn->dev; | |
164 | if (second_pass) { | |
165 | status = AE_ERROR; | |
166 | break; | |
167 | } | |
683058e3 | 168 | } |
683058e3 RW |
169 | } |
170 | ||
171 | mutex_unlock(&device->physical_node_lock); | |
172 | ||
173 | return status; | |
174 | } | |
175 | ||
7f28ddec RW |
176 | static acpi_status acpi_bus_online(acpi_handle handle, u32 lvl, void *data, |
177 | void **ret_p) | |
683058e3 RW |
178 | { |
179 | struct acpi_device *device = NULL; | |
180 | struct acpi_device_physical_node *pn; | |
181 | ||
182 | if (acpi_bus_get_device(handle, &device)) | |
183 | return AE_OK; | |
184 | ||
185 | mutex_lock(&device->physical_node_lock); | |
186 | ||
187 | list_for_each_entry(pn, &device->physical_node_list, node) | |
188 | if (pn->put_online) { | |
189 | device_online(pn->dev); | |
190 | pn->put_online = false; | |
191 | } | |
192 | ||
193 | mutex_unlock(&device->physical_node_lock); | |
194 | ||
195 | return AE_OK; | |
196 | } | |
197 | ||
a33ec399 | 198 | static int acpi_scan_hot_remove(struct acpi_device *device) |
1da177e4 | 199 | { |
5993c467 | 200 | acpi_handle handle = device->handle; |
303bfdb1 | 201 | struct device *errdev; |
a33ec399 | 202 | acpi_status status; |
882fd12e | 203 | unsigned long long sta; |
f058cdf4 | 204 | |
3757b948 | 205 | /* If there is no handle, the device node has been unregistered. */ |
a33ec399 | 206 | if (!handle) { |
3757b948 RW |
207 | dev_dbg(&device->dev, "ACPI handle missing\n"); |
208 | put_device(&device->dev); | |
a33ec399 | 209 | return -EINVAL; |
3757b948 RW |
210 | } |
211 | ||
303bfdb1 RW |
212 | /* |
213 | * Carry out two passes here and ignore errors in the first pass, | |
214 | * because if the devices in question are memory blocks and | |
215 | * CONFIG_MEMCG is set, one of the blocks may hold data structures | |
216 | * that the other blocks depend on, but it is not known in advance which | |
217 | * block holds them. | |
218 | * | |
219 | * If the first pass is successful, the second one isn't needed, though. | |
220 | */ | |
221 | errdev = NULL; | |
7f28ddec RW |
222 | status = acpi_walk_namespace(ACPI_TYPE_ANY, handle, ACPI_UINT32_MAX, |
223 | NULL, acpi_bus_offline, (void *)false, | |
224 | (void **)&errdev); | |
225 | if (status == AE_SUPPORT) { | |
226 | dev_warn(errdev, "Offline disabled.\n"); | |
227 | acpi_walk_namespace(ACPI_TYPE_ANY, handle, ACPI_UINT32_MAX, | |
228 | acpi_bus_online, NULL, NULL, NULL); | |
229 | put_device(&device->dev); | |
230 | return -EPERM; | |
231 | } | |
232 | acpi_bus_offline(handle, 0, (void *)false, (void **)&errdev); | |
303bfdb1 RW |
233 | if (errdev) { |
234 | errdev = NULL; | |
683058e3 | 235 | acpi_walk_namespace(ACPI_TYPE_ANY, handle, ACPI_UINT32_MAX, |
7f28ddec RW |
236 | NULL, acpi_bus_offline, (void *)true, |
237 | (void **)&errdev); | |
303bfdb1 | 238 | if (!errdev || acpi_force_hot_remove) |
7f28ddec RW |
239 | acpi_bus_offline(handle, 0, (void *)true, |
240 | (void **)&errdev); | |
303bfdb1 RW |
241 | |
242 | if (errdev && !acpi_force_hot_remove) { | |
243 | dev_warn(errdev, "Offline failed.\n"); | |
7f28ddec | 244 | acpi_bus_online(handle, 0, NULL, NULL); |
303bfdb1 | 245 | acpi_walk_namespace(ACPI_TYPE_ANY, handle, |
7f28ddec RW |
246 | ACPI_UINT32_MAX, acpi_bus_online, |
247 | NULL, NULL, NULL); | |
303bfdb1 RW |
248 | put_device(&device->dev); |
249 | return -EBUSY; | |
250 | } | |
683058e3 RW |
251 | } |
252 | ||
26d46867 | 253 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
0794469d | 254 | "Hot-removing device %s...\n", dev_name(&device->dev))); |
26d46867 | 255 | |
bfee26db | 256 | acpi_bus_trim(device); |
683058e3 | 257 | |
3757b948 RW |
258 | /* Device node has been unregistered. */ |
259 | put_device(&device->dev); | |
b3c450c3 TK |
260 | device = NULL; |
261 | ||
7d2421f8 | 262 | acpi_evaluate_lck(handle, 0); |
1da177e4 LT |
263 | /* |
264 | * TBD: _EJD support. | |
265 | */ | |
7d2421f8 JL |
266 | status = acpi_evaluate_ej0(handle); |
267 | if (status == AE_NOT_FOUND) | |
268 | return -ENODEV; | |
269 | else if (ACPI_FAILURE(status)) | |
270 | return -EIO; | |
1da177e4 | 271 | |
882fd12e TK |
272 | /* |
273 | * Verify if eject was indeed successful. If not, log an error | |
274 | * message. No need to call _OST since _EJ0 call was made OK. | |
275 | */ | |
276 | status = acpi_evaluate_integer(handle, "_STA", NULL, &sta); | |
277 | if (ACPI_FAILURE(status)) { | |
278 | acpi_handle_warn(handle, | |
279 | "Status check after eject failed (0x%x)\n", status); | |
280 | } else if (sta & ACPI_STA_DEVICE_ENABLED) { | |
281 | acpi_handle_warn(handle, | |
282 | "Eject incomplete - status 0x%llx\n", sta); | |
283 | } | |
284 | ||
a33ec399 RW |
285 | return 0; |
286 | } | |
1da177e4 | 287 | |
7b98118a | 288 | void acpi_bus_device_eject(void *data, u32 ost_src) |
a33ec399 | 289 | { |
7b98118a | 290 | struct acpi_device *device = data; |
a3b1b1ef | 291 | acpi_handle handle = device->handle; |
a33ec399 | 292 | u32 ost_code = ACPI_OST_SC_NON_SPECIFIC_FAILURE; |
f943db40 | 293 | int error; |
a33ec399 | 294 | |
e0ae8fee | 295 | lock_device_hotplug(); |
a33ec399 RW |
296 | mutex_lock(&acpi_scan_lock); |
297 | ||
a3b1b1ef RW |
298 | if (ost_src == ACPI_NOTIFY_EJECT_REQUEST) |
299 | acpi_evaluate_hotplug_ost(handle, ACPI_NOTIFY_EJECT_REQUEST, | |
300 | ACPI_OST_SC_EJECT_IN_PROGRESS, NULL); | |
7f28ddec | 301 | |
c1beb0bd | 302 | if (device->handler && device->handler->hotplug.mode == AHM_CONTAINER) |
a33ec399 | 303 | kobject_uevent(&device->dev.kobj, KOBJ_OFFLINE); |
a33ec399 | 304 | |
f943db40 | 305 | error = acpi_scan_hot_remove(device); |
7f28ddec RW |
306 | if (error == -EPERM) { |
307 | goto err_support; | |
308 | } else if (error) { | |
f943db40 | 309 | goto err_out; |
7f28ddec | 310 | } |
1da177e4 | 311 | |
3757b948 | 312 | out: |
f058cdf4 | 313 | mutex_unlock(&acpi_scan_lock); |
e0ae8fee | 314 | unlock_device_hotplug(); |
c8d72a5e | 315 | return; |
a33ec399 | 316 | |
7f28ddec RW |
317 | err_support: |
318 | ost_code = ACPI_OST_SC_EJECT_NOT_SUPPORTED; | |
a33ec399 | 319 | err_out: |
a3b1b1ef | 320 | acpi_evaluate_hotplug_ost(handle, ost_src, ost_code, NULL); |
a33ec399 RW |
321 | goto out; |
322 | } | |
323 | ||
7b98118a | 324 | static void acpi_scan_bus_device_check(void *data, u32 ost_source) |
a33ec399 | 325 | { |
7b98118a | 326 | acpi_handle handle = data; |
a33ec399 RW |
327 | struct acpi_device *device = NULL; |
328 | u32 ost_code = ACPI_OST_SC_NON_SPECIFIC_FAILURE; | |
329 | int error; | |
330 | ||
683058e3 | 331 | lock_device_hotplug(); |
e0ae8fee | 332 | mutex_lock(&acpi_scan_lock); |
a33ec399 | 333 | |
8832f7e4 RW |
334 | if (ost_source != ACPI_NOTIFY_BUS_CHECK) { |
335 | acpi_bus_get_device(handle, &device); | |
336 | if (device) { | |
337 | dev_warn(&device->dev, "Attempt to re-insert\n"); | |
338 | goto out; | |
339 | } | |
a33ec399 | 340 | } |
a33ec399 RW |
341 | error = acpi_bus_scan(handle); |
342 | if (error) { | |
343 | acpi_handle_warn(handle, "Namespace scan failure\n"); | |
344 | goto out; | |
345 | } | |
346 | error = acpi_bus_get_device(handle, &device); | |
347 | if (error) { | |
348 | acpi_handle_warn(handle, "Missing device node object\n"); | |
349 | goto out; | |
350 | } | |
351 | ost_code = ACPI_OST_SC_SUCCESS; | |
352 | if (device->handler && device->handler->hotplug.mode == AHM_CONTAINER) | |
353 | kobject_uevent(&device->dev.kobj, KOBJ_ONLINE); | |
354 | ||
355 | out: | |
356 | acpi_evaluate_hotplug_ost(handle, ost_source, ost_code, NULL); | |
357 | mutex_unlock(&acpi_scan_lock); | |
e0ae8fee | 358 | unlock_device_hotplug(); |
a33ec399 RW |
359 | } |
360 | ||
2cbb14fb TK |
361 | static void acpi_hotplug_unsupported(acpi_handle handle, u32 type) |
362 | { | |
363 | u32 ost_status; | |
364 | ||
365 | switch (type) { | |
366 | case ACPI_NOTIFY_BUS_CHECK: | |
367 | acpi_handle_debug(handle, | |
368 | "ACPI_NOTIFY_BUS_CHECK event: unsupported\n"); | |
369 | ost_status = ACPI_OST_SC_INSERT_NOT_SUPPORTED; | |
370 | break; | |
371 | case ACPI_NOTIFY_DEVICE_CHECK: | |
372 | acpi_handle_debug(handle, | |
373 | "ACPI_NOTIFY_DEVICE_CHECK event: unsupported\n"); | |
374 | ost_status = ACPI_OST_SC_INSERT_NOT_SUPPORTED; | |
375 | break; | |
376 | case ACPI_NOTIFY_EJECT_REQUEST: | |
377 | acpi_handle_debug(handle, | |
378 | "ACPI_NOTIFY_EJECT_REQUEST event: unsupported\n"); | |
379 | ost_status = ACPI_OST_SC_EJECT_NOT_SUPPORTED; | |
380 | break; | |
381 | default: | |
382 | /* non-hotplug event; possibly handled by other handler */ | |
383 | return; | |
384 | } | |
385 | ||
386 | acpi_evaluate_hotplug_ost(handle, type, ost_status, NULL); | |
387 | } | |
388 | ||
389 | static void acpi_hotplug_notify_cb(acpi_handle handle, u32 type, void *data) | |
a33ec399 | 390 | { |
2cbb14fb | 391 | struct acpi_scan_handler *handler = data; |
a3b1b1ef | 392 | struct acpi_device *adev; |
a33ec399 RW |
393 | acpi_status status; |
394 | ||
2cbb14fb TK |
395 | if (!handler->hotplug.enabled) |
396 | return acpi_hotplug_unsupported(handle, type); | |
397 | ||
a33ec399 RW |
398 | switch (type) { |
399 | case ACPI_NOTIFY_BUS_CHECK: | |
400 | acpi_handle_debug(handle, "ACPI_NOTIFY_BUS_CHECK event\n"); | |
a33ec399 RW |
401 | break; |
402 | case ACPI_NOTIFY_DEVICE_CHECK: | |
403 | acpi_handle_debug(handle, "ACPI_NOTIFY_DEVICE_CHECK event\n"); | |
a33ec399 RW |
404 | break; |
405 | case ACPI_NOTIFY_EJECT_REQUEST: | |
406 | acpi_handle_debug(handle, "ACPI_NOTIFY_EJECT_REQUEST event\n"); | |
5beaee4f | 407 | if (acpi_bus_get_device(handle, &adev)) |
a3b1b1ef RW |
408 | goto err_out; |
409 | ||
410 | get_device(&adev->dev); | |
7b98118a | 411 | status = acpi_hotplug_execute(acpi_bus_device_eject, adev, type); |
a3b1b1ef RW |
412 | if (ACPI_SUCCESS(status)) |
413 | return; | |
414 | ||
415 | put_device(&adev->dev); | |
416 | goto err_out; | |
a33ec399 RW |
417 | default: |
418 | /* non-hotplug event; possibly handled by other handler */ | |
419 | return; | |
420 | } | |
7b98118a | 421 | status = acpi_hotplug_execute(acpi_scan_bus_device_check, handle, type); |
a3b1b1ef RW |
422 | if (ACPI_SUCCESS(status)) |
423 | return; | |
a33ec399 | 424 | |
a3b1b1ef RW |
425 | err_out: |
426 | acpi_evaluate_hotplug_ost(handle, type, | |
427 | ACPI_OST_SC_NON_SPECIFIC_FAILURE, NULL); | |
1da177e4 LT |
428 | } |
429 | ||
836aedb1 RW |
430 | static ssize_t real_power_state_show(struct device *dev, |
431 | struct device_attribute *attr, char *buf) | |
432 | { | |
433 | struct acpi_device *adev = to_acpi_device(dev); | |
434 | int state; | |
435 | int ret; | |
436 | ||
437 | ret = acpi_device_get_power(adev, &state); | |
438 | if (ret) | |
439 | return ret; | |
440 | ||
441 | return sprintf(buf, "%s\n", acpi_power_state_string(state)); | |
442 | } | |
443 | ||
444 | static DEVICE_ATTR(real_power_state, 0444, real_power_state_show, NULL); | |
445 | ||
446 | static ssize_t power_state_show(struct device *dev, | |
447 | struct device_attribute *attr, char *buf) | |
448 | { | |
449 | struct acpi_device *adev = to_acpi_device(dev); | |
450 | ||
451 | return sprintf(buf, "%s\n", acpi_power_state_string(adev->power.state)); | |
452 | } | |
453 | ||
454 | static DEVICE_ATTR(power_state, 0444, power_state_show, NULL); | |
455 | ||
1da177e4 | 456 | static ssize_t |
f883d9db PM |
457 | acpi_eject_store(struct device *d, struct device_attribute *attr, |
458 | const char *buf, size_t count) | |
1da177e4 | 459 | { |
f883d9db | 460 | struct acpi_device *acpi_device = to_acpi_device(d); |
a33ec399 RW |
461 | acpi_object_type not_used; |
462 | acpi_status status; | |
1da177e4 | 463 | |
a33ec399 | 464 | if (!count || buf[0] != '1') |
1da177e4 | 465 | return -EINVAL; |
1da177e4 | 466 | |
a33ec399 RW |
467 | if ((!acpi_device->handler || !acpi_device->handler->hotplug.enabled) |
468 | && !acpi_device->driver) | |
469 | return -ENODEV; | |
470 | ||
471 | status = acpi_get_type(acpi_device->handle, ¬_used); | |
472 | if (ACPI_FAILURE(status) || !acpi_device->flags.ejectable) | |
473 | return -ENODEV; | |
474 | ||
f943db40 | 475 | acpi_evaluate_hotplug_ost(acpi_device->handle, ACPI_OST_EC_OSPM_EJECT, |
a33ec399 | 476 | ACPI_OST_SC_EJECT_IN_PROGRESS, NULL); |
a33ec399 | 477 | get_device(&acpi_device->dev); |
7b98118a RW |
478 | status = acpi_hotplug_execute(acpi_bus_device_eject, acpi_device, |
479 | ACPI_OST_EC_OSPM_EJECT); | |
f943db40 RW |
480 | if (ACPI_SUCCESS(status)) |
481 | return count; | |
a33ec399 | 482 | |
f943db40 | 483 | put_device(&acpi_device->dev); |
f943db40 | 484 | acpi_evaluate_hotplug_ost(acpi_device->handle, ACPI_OST_EC_OSPM_EJECT, |
a33ec399 | 485 | ACPI_OST_SC_NON_SPECIFIC_FAILURE, NULL); |
5add99cf | 486 | return status == AE_NO_MEMORY ? -ENOMEM : -EAGAIN; |
1da177e4 LT |
487 | } |
488 | ||
f883d9db | 489 | static DEVICE_ATTR(eject, 0200, NULL, acpi_eject_store); |
1da177e4 | 490 | |
e49bd2dd ZR |
491 | static ssize_t |
492 | acpi_device_hid_show(struct device *dev, struct device_attribute *attr, char *buf) { | |
493 | struct acpi_device *acpi_dev = to_acpi_device(dev); | |
1da177e4 | 494 | |
ea8d82fd | 495 | return sprintf(buf, "%s\n", acpi_device_hid(acpi_dev)); |
1da177e4 | 496 | } |
e49bd2dd | 497 | static DEVICE_ATTR(hid, 0444, acpi_device_hid_show, NULL); |
1da177e4 | 498 | |
923d4a45 LZ |
499 | static ssize_t acpi_device_uid_show(struct device *dev, |
500 | struct device_attribute *attr, char *buf) | |
501 | { | |
502 | struct acpi_device *acpi_dev = to_acpi_device(dev); | |
503 | ||
504 | return sprintf(buf, "%s\n", acpi_dev->pnp.unique_id); | |
505 | } | |
506 | static DEVICE_ATTR(uid, 0444, acpi_device_uid_show, NULL); | |
507 | ||
508 | static ssize_t acpi_device_adr_show(struct device *dev, | |
509 | struct device_attribute *attr, char *buf) | |
510 | { | |
511 | struct acpi_device *acpi_dev = to_acpi_device(dev); | |
512 | ||
513 | return sprintf(buf, "0x%08x\n", | |
514 | (unsigned int)(acpi_dev->pnp.bus_address)); | |
515 | } | |
516 | static DEVICE_ATTR(adr, 0444, acpi_device_adr_show, NULL); | |
517 | ||
e49bd2dd ZR |
518 | static ssize_t |
519 | acpi_device_path_show(struct device *dev, struct device_attribute *attr, char *buf) { | |
520 | struct acpi_device *acpi_dev = to_acpi_device(dev); | |
521 | struct acpi_buffer path = {ACPI_ALLOCATE_BUFFER, NULL}; | |
522 | int result; | |
1da177e4 | 523 | |
e49bd2dd | 524 | result = acpi_get_name(acpi_dev->handle, ACPI_FULL_PATHNAME, &path); |
0c526d96 | 525 | if (result) |
e49bd2dd | 526 | goto end; |
1da177e4 | 527 | |
e49bd2dd ZR |
528 | result = sprintf(buf, "%s\n", (char*)path.pointer); |
529 | kfree(path.pointer); | |
0c526d96 | 530 | end: |
e49bd2dd | 531 | return result; |
1da177e4 | 532 | } |
e49bd2dd | 533 | static DEVICE_ATTR(path, 0444, acpi_device_path_show, NULL); |
1da177e4 | 534 | |
d1efe3c3 LO |
535 | /* sysfs file that shows description text from the ACPI _STR method */ |
536 | static ssize_t description_show(struct device *dev, | |
537 | struct device_attribute *attr, | |
538 | char *buf) { | |
539 | struct acpi_device *acpi_dev = to_acpi_device(dev); | |
540 | int result; | |
541 | ||
542 | if (acpi_dev->pnp.str_obj == NULL) | |
543 | return 0; | |
544 | ||
545 | /* | |
546 | * The _STR object contains a Unicode identifier for a device. | |
547 | * We need to convert to utf-8 so it can be displayed. | |
548 | */ | |
549 | result = utf16s_to_utf8s( | |
550 | (wchar_t *)acpi_dev->pnp.str_obj->buffer.pointer, | |
551 | acpi_dev->pnp.str_obj->buffer.length, | |
552 | UTF16_LITTLE_ENDIAN, buf, | |
553 | PAGE_SIZE); | |
554 | ||
555 | buf[result++] = '\n'; | |
556 | ||
557 | return result; | |
558 | } | |
559 | static DEVICE_ATTR(description, 0444, description_show, NULL); | |
560 | ||
bb74ac23 YI |
561 | static ssize_t |
562 | acpi_device_sun_show(struct device *dev, struct device_attribute *attr, | |
563 | char *buf) { | |
564 | struct acpi_device *acpi_dev = to_acpi_device(dev); | |
565 | ||
566 | return sprintf(buf, "%lu\n", acpi_dev->pnp.sun); | |
567 | } | |
568 | static DEVICE_ATTR(sun, 0444, acpi_device_sun_show, NULL); | |
569 | ||
e49bd2dd | 570 | static int acpi_device_setup_files(struct acpi_device *dev) |
1da177e4 | 571 | { |
d1efe3c3 | 572 | struct acpi_buffer buffer = {ACPI_ALLOCATE_BUFFER, NULL}; |
f883d9db | 573 | acpi_status status; |
bb74ac23 | 574 | unsigned long long sun; |
e49bd2dd | 575 | int result = 0; |
1da177e4 LT |
576 | |
577 | /* | |
e49bd2dd | 578 | * Devices gotten from FADT don't have a "path" attribute |
1da177e4 | 579 | */ |
0c526d96 | 580 | if (dev->handle) { |
e49bd2dd | 581 | result = device_create_file(&dev->dev, &dev_attr_path); |
0c526d96 | 582 | if (result) |
e49bd2dd | 583 | goto end; |
1da177e4 LT |
584 | } |
585 | ||
2b2ae7c7 TR |
586 | if (!list_empty(&dev->pnp.ids)) { |
587 | result = device_create_file(&dev->dev, &dev_attr_hid); | |
588 | if (result) | |
589 | goto end; | |
1da177e4 | 590 | |
2b2ae7c7 TR |
591 | result = device_create_file(&dev->dev, &dev_attr_modalias); |
592 | if (result) | |
593 | goto end; | |
594 | } | |
29b71a1c | 595 | |
d1efe3c3 LO |
596 | /* |
597 | * If device has _STR, 'description' file is created | |
598 | */ | |
952c63e9 | 599 | if (acpi_has_method(dev->handle, "_STR")) { |
d1efe3c3 LO |
600 | status = acpi_evaluate_object(dev->handle, "_STR", |
601 | NULL, &buffer); | |
602 | if (ACPI_FAILURE(status)) | |
603 | buffer.pointer = NULL; | |
604 | dev->pnp.str_obj = buffer.pointer; | |
605 | result = device_create_file(&dev->dev, &dev_attr_description); | |
606 | if (result) | |
607 | goto end; | |
608 | } | |
609 | ||
d4e1a692 | 610 | if (dev->pnp.type.bus_address) |
923d4a45 LZ |
611 | result = device_create_file(&dev->dev, &dev_attr_adr); |
612 | if (dev->pnp.unique_id) | |
613 | result = device_create_file(&dev->dev, &dev_attr_uid); | |
614 | ||
bb74ac23 YI |
615 | status = acpi_evaluate_integer(dev->handle, "_SUN", NULL, &sun); |
616 | if (ACPI_SUCCESS(status)) { | |
617 | dev->pnp.sun = (unsigned long)sun; | |
618 | result = device_create_file(&dev->dev, &dev_attr_sun); | |
619 | if (result) | |
620 | goto end; | |
621 | } else { | |
622 | dev->pnp.sun = (unsigned long)-1; | |
623 | } | |
624 | ||
e49bd2dd ZR |
625 | /* |
626 | * If device has _EJ0, 'eject' file is created that is used to trigger | |
627 | * hot-removal function from userland. | |
628 | */ | |
952c63e9 | 629 | if (acpi_has_method(dev->handle, "_EJ0")) { |
e49bd2dd | 630 | result = device_create_file(&dev->dev, &dev_attr_eject); |
836aedb1 RW |
631 | if (result) |
632 | return result; | |
633 | } | |
634 | ||
635 | if (dev->flags.power_manageable) { | |
636 | result = device_create_file(&dev->dev, &dev_attr_power_state); | |
637 | if (result) | |
638 | return result; | |
639 | ||
640 | if (dev->power.flags.power_resources) | |
641 | result = device_create_file(&dev->dev, | |
642 | &dev_attr_real_power_state); | |
643 | } | |
644 | ||
0c526d96 | 645 | end: |
e49bd2dd | 646 | return result; |
1da177e4 LT |
647 | } |
648 | ||
f883d9db | 649 | static void acpi_device_remove_files(struct acpi_device *dev) |
1da177e4 | 650 | { |
836aedb1 RW |
651 | if (dev->flags.power_manageable) { |
652 | device_remove_file(&dev->dev, &dev_attr_power_state); | |
653 | if (dev->power.flags.power_resources) | |
654 | device_remove_file(&dev->dev, | |
655 | &dev_attr_real_power_state); | |
656 | } | |
657 | ||
f883d9db | 658 | /* |
d1efe3c3 LO |
659 | * If device has _STR, remove 'description' file |
660 | */ | |
952c63e9 | 661 | if (acpi_has_method(dev->handle, "_STR")) { |
d1efe3c3 LO |
662 | kfree(dev->pnp.str_obj); |
663 | device_remove_file(&dev->dev, &dev_attr_description); | |
664 | } | |
665 | /* | |
666 | * If device has _EJ0, remove 'eject' file. | |
f883d9db | 667 | */ |
952c63e9 | 668 | if (acpi_has_method(dev->handle, "_EJ0")) |
f883d9db | 669 | device_remove_file(&dev->dev, &dev_attr_eject); |
1da177e4 | 670 | |
952c63e9 | 671 | if (acpi_has_method(dev->handle, "_SUN")) |
bb74ac23 YI |
672 | device_remove_file(&dev->dev, &dev_attr_sun); |
673 | ||
923d4a45 LZ |
674 | if (dev->pnp.unique_id) |
675 | device_remove_file(&dev->dev, &dev_attr_uid); | |
d4e1a692 | 676 | if (dev->pnp.type.bus_address) |
923d4a45 | 677 | device_remove_file(&dev->dev, &dev_attr_adr); |
1131b938 BH |
678 | device_remove_file(&dev->dev, &dev_attr_modalias); |
679 | device_remove_file(&dev->dev, &dev_attr_hid); | |
0c526d96 | 680 | if (dev->handle) |
e49bd2dd | 681 | device_remove_file(&dev->dev, &dev_attr_path); |
1da177e4 | 682 | } |
1da177e4 | 683 | /* -------------------------------------------------------------------------- |
9e89dde2 | 684 | ACPI Bus operations |
1da177e4 | 685 | -------------------------------------------------------------------------- */ |
29b71a1c | 686 | |
cf761af9 MW |
687 | static const struct acpi_device_id *__acpi_match_device( |
688 | struct acpi_device *device, const struct acpi_device_id *ids) | |
29b71a1c TR |
689 | { |
690 | const struct acpi_device_id *id; | |
7f47fa6c | 691 | struct acpi_hardware_id *hwid; |
29b71a1c | 692 | |
39a0ad87 ZY |
693 | /* |
694 | * If the device is not present, it is unnecessary to load device | |
695 | * driver for it. | |
696 | */ | |
697 | if (!device->status.present) | |
cf761af9 | 698 | return NULL; |
39a0ad87 | 699 | |
7f47fa6c BH |
700 | for (id = ids; id->id[0]; id++) |
701 | list_for_each_entry(hwid, &device->pnp.ids, list) | |
702 | if (!strcmp((char *) id->id, hwid->id)) | |
cf761af9 MW |
703 | return id; |
704 | ||
705 | return NULL; | |
706 | } | |
707 | ||
708 | /** | |
709 | * acpi_match_device - Match a struct device against a given list of ACPI IDs | |
710 | * @ids: Array of struct acpi_device_id object to match against. | |
711 | * @dev: The device structure to match. | |
712 | * | |
713 | * Check if @dev has a valid ACPI handle and if there is a struct acpi_device | |
714 | * object for that handle and use that object to match against a given list of | |
715 | * device IDs. | |
716 | * | |
717 | * Return a pointer to the first matching ID on success or %NULL on failure. | |
718 | */ | |
719 | const struct acpi_device_id *acpi_match_device(const struct acpi_device_id *ids, | |
720 | const struct device *dev) | |
721 | { | |
722 | struct acpi_device *adev; | |
0613e1f7 | 723 | acpi_handle handle = ACPI_HANDLE(dev); |
cf761af9 | 724 | |
0613e1f7 | 725 | if (!ids || !handle || acpi_bus_get_device(handle, &adev)) |
cf761af9 MW |
726 | return NULL; |
727 | ||
728 | return __acpi_match_device(adev, ids); | |
729 | } | |
730 | EXPORT_SYMBOL_GPL(acpi_match_device); | |
29b71a1c | 731 | |
cf761af9 MW |
732 | int acpi_match_device_ids(struct acpi_device *device, |
733 | const struct acpi_device_id *ids) | |
734 | { | |
735 | return __acpi_match_device(device, ids) ? 0 : -ENOENT; | |
29b71a1c TR |
736 | } |
737 | EXPORT_SYMBOL(acpi_match_device_ids); | |
738 | ||
0b224527 RW |
739 | static void acpi_free_power_resources_lists(struct acpi_device *device) |
740 | { | |
741 | int i; | |
742 | ||
993cbe59 RW |
743 | if (device->wakeup.flags.valid) |
744 | acpi_power_resources_list_free(&device->wakeup.resources); | |
745 | ||
0b224527 RW |
746 | if (!device->flags.power_manageable) |
747 | return; | |
748 | ||
749 | for (i = ACPI_STATE_D0; i <= ACPI_STATE_D3_HOT; i++) { | |
750 | struct acpi_device_power_state *ps = &device->power.states[i]; | |
751 | acpi_power_resources_list_free(&ps->resources); | |
752 | } | |
7f47fa6c BH |
753 | } |
754 | ||
1890a97a | 755 | static void acpi_device_release(struct device *dev) |
1da177e4 | 756 | { |
1890a97a | 757 | struct acpi_device *acpi_dev = to_acpi_device(dev); |
1da177e4 | 758 | |
c0af4175 | 759 | acpi_free_pnp_ids(&acpi_dev->pnp); |
0b224527 | 760 | acpi_free_power_resources_lists(acpi_dev); |
1890a97a | 761 | kfree(acpi_dev); |
1da177e4 LT |
762 | } |
763 | ||
5d9464a4 | 764 | static int acpi_bus_match(struct device *dev, struct device_driver *drv) |
9e89dde2 | 765 | { |
5d9464a4 PM |
766 | struct acpi_device *acpi_dev = to_acpi_device(dev); |
767 | struct acpi_driver *acpi_drv = to_acpi_driver(drv); | |
1da177e4 | 768 | |
209d3b17 | 769 | return acpi_dev->flags.match_driver |
805d410f | 770 | && !acpi_match_device_ids(acpi_dev, acpi_drv->ids); |
5d9464a4 | 771 | } |
1da177e4 | 772 | |
7eff2e7a | 773 | static int acpi_device_uevent(struct device *dev, struct kobj_uevent_env *env) |
1da177e4 | 774 | { |
5d9464a4 | 775 | struct acpi_device *acpi_dev = to_acpi_device(dev); |
7eff2e7a | 776 | int len; |
5d9464a4 | 777 | |
2b2ae7c7 TR |
778 | if (list_empty(&acpi_dev->pnp.ids)) |
779 | return 0; | |
780 | ||
7eff2e7a KS |
781 | if (add_uevent_var(env, "MODALIAS=")) |
782 | return -ENOMEM; | |
783 | len = create_modalias(acpi_dev, &env->buf[env->buflen - 1], | |
784 | sizeof(env->buf) - env->buflen); | |
785 | if (len >= (sizeof(env->buf) - env->buflen)) | |
786 | return -ENOMEM; | |
787 | env->buflen += len; | |
9e89dde2 | 788 | return 0; |
1da177e4 LT |
789 | } |
790 | ||
46ec8598 BH |
791 | static void acpi_device_notify(acpi_handle handle, u32 event, void *data) |
792 | { | |
793 | struct acpi_device *device = data; | |
794 | ||
795 | device->driver->ops.notify(device, event); | |
796 | } | |
797 | ||
798 | static acpi_status acpi_device_notify_fixed(void *data) | |
799 | { | |
800 | struct acpi_device *device = data; | |
801 | ||
53de5356 BH |
802 | /* Fixed hardware devices have no handles */ |
803 | acpi_device_notify(NULL, ACPI_FIXED_HARDWARE_EVENT, device); | |
46ec8598 BH |
804 | return AE_OK; |
805 | } | |
806 | ||
807 | static int acpi_device_install_notify_handler(struct acpi_device *device) | |
808 | { | |
809 | acpi_status status; | |
46ec8598 | 810 | |
ccba2a36 | 811 | if (device->device_type == ACPI_BUS_TYPE_POWER_BUTTON) |
46ec8598 BH |
812 | status = |
813 | acpi_install_fixed_event_handler(ACPI_EVENT_POWER_BUTTON, | |
814 | acpi_device_notify_fixed, | |
815 | device); | |
ccba2a36 | 816 | else if (device->device_type == ACPI_BUS_TYPE_SLEEP_BUTTON) |
46ec8598 BH |
817 | status = |
818 | acpi_install_fixed_event_handler(ACPI_EVENT_SLEEP_BUTTON, | |
819 | acpi_device_notify_fixed, | |
820 | device); | |
821 | else | |
822 | status = acpi_install_notify_handler(device->handle, | |
823 | ACPI_DEVICE_NOTIFY, | |
824 | acpi_device_notify, | |
825 | device); | |
826 | ||
827 | if (ACPI_FAILURE(status)) | |
828 | return -EINVAL; | |
829 | return 0; | |
830 | } | |
831 | ||
832 | static void acpi_device_remove_notify_handler(struct acpi_device *device) | |
833 | { | |
ccba2a36 | 834 | if (device->device_type == ACPI_BUS_TYPE_POWER_BUTTON) |
46ec8598 BH |
835 | acpi_remove_fixed_event_handler(ACPI_EVENT_POWER_BUTTON, |
836 | acpi_device_notify_fixed); | |
ccba2a36 | 837 | else if (device->device_type == ACPI_BUS_TYPE_SLEEP_BUTTON) |
46ec8598 BH |
838 | acpi_remove_fixed_event_handler(ACPI_EVENT_SLEEP_BUTTON, |
839 | acpi_device_notify_fixed); | |
840 | else | |
841 | acpi_remove_notify_handler(device->handle, ACPI_DEVICE_NOTIFY, | |
842 | acpi_device_notify); | |
843 | } | |
844 | ||
d9e455f5 | 845 | static int acpi_device_probe(struct device *dev) |
1da177e4 | 846 | { |
5d9464a4 PM |
847 | struct acpi_device *acpi_dev = to_acpi_device(dev); |
848 | struct acpi_driver *acpi_drv = to_acpi_driver(dev->driver); | |
849 | int ret; | |
850 | ||
24071f47 RW |
851 | if (acpi_dev->handler) |
852 | return -EINVAL; | |
853 | ||
d9e455f5 RW |
854 | if (!acpi_drv->ops.add) |
855 | return -ENOSYS; | |
46ec8598 | 856 | |
d9e455f5 RW |
857 | ret = acpi_drv->ops.add(acpi_dev); |
858 | if (ret) | |
859 | return ret; | |
46ec8598 | 860 | |
d9e455f5 RW |
861 | acpi_dev->driver = acpi_drv; |
862 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, | |
863 | "Driver [%s] successfully bound to device [%s]\n", | |
864 | acpi_drv->name, acpi_dev->pnp.bus_id)); | |
865 | ||
866 | if (acpi_drv->ops.notify) { | |
867 | ret = acpi_device_install_notify_handler(acpi_dev); | |
868 | if (ret) { | |
869 | if (acpi_drv->ops.remove) | |
870 | acpi_drv->ops.remove(acpi_dev); | |
871 | ||
872 | acpi_dev->driver = NULL; | |
873 | acpi_dev->driver_data = NULL; | |
874 | return ret; | |
875 | } | |
5d9464a4 | 876 | } |
d9e455f5 RW |
877 | |
878 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Found driver [%s] for device [%s]\n", | |
879 | acpi_drv->name, acpi_dev->pnp.bus_id)); | |
880 | get_device(dev); | |
881 | return 0; | |
5d9464a4 | 882 | } |
1da177e4 | 883 | |
5d9464a4 PM |
884 | static int acpi_device_remove(struct device * dev) |
885 | { | |
886 | struct acpi_device *acpi_dev = to_acpi_device(dev); | |
887 | struct acpi_driver *acpi_drv = acpi_dev->driver; | |
888 | ||
889 | if (acpi_drv) { | |
46ec8598 BH |
890 | if (acpi_drv->ops.notify) |
891 | acpi_device_remove_notify_handler(acpi_dev); | |
5d9464a4 | 892 | if (acpi_drv->ops.remove) |
51fac838 | 893 | acpi_drv->ops.remove(acpi_dev); |
1da177e4 | 894 | } |
5d9464a4 | 895 | acpi_dev->driver = NULL; |
db89b4f0 | 896 | acpi_dev->driver_data = NULL; |
1da177e4 | 897 | |
5d9464a4 | 898 | put_device(dev); |
9e89dde2 ZR |
899 | return 0; |
900 | } | |
1da177e4 | 901 | |
55955aad | 902 | struct bus_type acpi_bus_type = { |
9e89dde2 | 903 | .name = "acpi", |
5d9464a4 PM |
904 | .match = acpi_bus_match, |
905 | .probe = acpi_device_probe, | |
906 | .remove = acpi_device_remove, | |
907 | .uevent = acpi_device_uevent, | |
9e89dde2 ZR |
908 | }; |
909 | ||
caf5c03f RW |
910 | static void acpi_bus_data_handler(acpi_handle handle, void *context) |
911 | { | |
912 | /* Intentionally empty. */ | |
913 | } | |
914 | ||
915 | int acpi_bus_get_device(acpi_handle handle, struct acpi_device **device) | |
916 | { | |
917 | acpi_status status; | |
918 | ||
919 | if (!device) | |
920 | return -EINVAL; | |
921 | ||
922 | status = acpi_get_data(handle, acpi_bus_data_handler, (void **)device); | |
923 | if (ACPI_FAILURE(status) || !*device) { | |
924 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "No context for object [%p]\n", | |
925 | handle)); | |
926 | return -ENODEV; | |
927 | } | |
928 | return 0; | |
929 | } | |
6585925b | 930 | EXPORT_SYMBOL(acpi_bus_get_device); |
caf5c03f | 931 | |
cf860be6 RW |
932 | int acpi_device_add(struct acpi_device *device, |
933 | void (*release)(struct device *)) | |
1da177e4 | 934 | { |
4be44fcd | 935 | int result; |
e49bd2dd ZR |
936 | struct acpi_device_bus_id *acpi_device_bus_id, *new_bus_id; |
937 | int found = 0; | |
66b7ed40 | 938 | |
d43e167d RW |
939 | if (device->handle) { |
940 | acpi_status status; | |
941 | ||
942 | status = acpi_attach_data(device->handle, acpi_bus_data_handler, | |
943 | device); | |
944 | if (ACPI_FAILURE(status)) { | |
945 | acpi_handle_err(device->handle, | |
946 | "Unable to attach device data\n"); | |
947 | return -ENODEV; | |
948 | } | |
949 | } | |
950 | ||
9e89dde2 ZR |
951 | /* |
952 | * Linkage | |
953 | * ------- | |
954 | * Link this device to its parent and siblings. | |
955 | */ | |
956 | INIT_LIST_HEAD(&device->children); | |
957 | INIT_LIST_HEAD(&device->node); | |
9e89dde2 | 958 | INIT_LIST_HEAD(&device->wakeup_list); |
1033f904 LT |
959 | INIT_LIST_HEAD(&device->physical_node_list); |
960 | mutex_init(&device->physical_node_lock); | |
1da177e4 | 961 | |
e49bd2dd ZR |
962 | new_bus_id = kzalloc(sizeof(struct acpi_device_bus_id), GFP_KERNEL); |
963 | if (!new_bus_id) { | |
d43e167d RW |
964 | pr_err(PREFIX "Memory allocation error\n"); |
965 | result = -ENOMEM; | |
966 | goto err_detach; | |
1da177e4 | 967 | } |
e49bd2dd | 968 | |
9090589d | 969 | mutex_lock(&acpi_device_lock); |
e49bd2dd ZR |
970 | /* |
971 | * Find suitable bus_id and instance number in acpi_bus_id_list | |
972 | * If failed, create one and link it into acpi_bus_id_list | |
973 | */ | |
974 | list_for_each_entry(acpi_device_bus_id, &acpi_bus_id_list, node) { | |
1131b938 BH |
975 | if (!strcmp(acpi_device_bus_id->bus_id, |
976 | acpi_device_hid(device))) { | |
977 | acpi_device_bus_id->instance_no++; | |
e49bd2dd ZR |
978 | found = 1; |
979 | kfree(new_bus_id); | |
980 | break; | |
981 | } | |
1da177e4 | 982 | } |
0c526d96 | 983 | if (!found) { |
e49bd2dd | 984 | acpi_device_bus_id = new_bus_id; |
1131b938 | 985 | strcpy(acpi_device_bus_id->bus_id, acpi_device_hid(device)); |
e49bd2dd ZR |
986 | acpi_device_bus_id->instance_no = 0; |
987 | list_add_tail(&acpi_device_bus_id->node, &acpi_bus_id_list); | |
1da177e4 | 988 | } |
0794469d | 989 | dev_set_name(&device->dev, "%s:%02x", acpi_device_bus_id->bus_id, acpi_device_bus_id->instance_no); |
1da177e4 | 990 | |
33b57150 | 991 | if (device->parent) |
9e89dde2 | 992 | list_add_tail(&device->node, &device->parent->children); |
33b57150 | 993 | |
9e89dde2 ZR |
994 | if (device->wakeup.flags.valid) |
995 | list_add_tail(&device->wakeup_list, &acpi_wakeup_device_list); | |
9090589d | 996 | mutex_unlock(&acpi_device_lock); |
1da177e4 | 997 | |
1890a97a | 998 | if (device->parent) |
66b7ed40 | 999 | device->dev.parent = &device->parent->dev; |
1890a97a | 1000 | device->dev.bus = &acpi_bus_type; |
82c7d5ef | 1001 | device->dev.release = release; |
cf860be6 | 1002 | result = device_add(&device->dev); |
0c526d96 | 1003 | if (result) { |
8b12b922 | 1004 | dev_err(&device->dev, "Error registering device\n"); |
d43e167d | 1005 | goto err; |
1da177e4 | 1006 | } |
1da177e4 | 1007 | |
e49bd2dd | 1008 | result = acpi_device_setup_files(device); |
0c526d96 | 1009 | if (result) |
0794469d KS |
1010 | printk(KERN_ERR PREFIX "Error creating sysfs interface for device %s\n", |
1011 | dev_name(&device->dev)); | |
1da177e4 | 1012 | |
1da177e4 | 1013 | return 0; |
d43e167d RW |
1014 | |
1015 | err: | |
9090589d | 1016 | mutex_lock(&acpi_device_lock); |
33b57150 | 1017 | if (device->parent) |
e49bd2dd | 1018 | list_del(&device->node); |
e49bd2dd | 1019 | list_del(&device->wakeup_list); |
9090589d | 1020 | mutex_unlock(&acpi_device_lock); |
d43e167d RW |
1021 | |
1022 | err_detach: | |
1023 | acpi_detach_data(device->handle, acpi_bus_data_handler); | |
e49bd2dd | 1024 | return result; |
1da177e4 LT |
1025 | } |
1026 | ||
b17b537a | 1027 | static void acpi_device_unregister(struct acpi_device *device) |
9e89dde2 | 1028 | { |
9090589d | 1029 | mutex_lock(&acpi_device_lock); |
33b57150 | 1030 | if (device->parent) |
9e89dde2 | 1031 | list_del(&device->node); |
1da177e4 | 1032 | |
9e89dde2 | 1033 | list_del(&device->wakeup_list); |
9090589d | 1034 | mutex_unlock(&acpi_device_lock); |
1da177e4 | 1035 | |
9e89dde2 | 1036 | acpi_detach_data(device->handle, acpi_bus_data_handler); |
1890a97a | 1037 | |
bc9b6407 | 1038 | acpi_power_add_remove_device(device, false); |
f883d9db | 1039 | acpi_device_remove_files(device); |
b1c0f99b RW |
1040 | if (device->remove) |
1041 | device->remove(device); | |
1042 | ||
cf860be6 | 1043 | device_del(&device->dev); |
bc9b6407 | 1044 | /* |
0aa120a0 RW |
1045 | * Transition the device to D3cold to drop the reference counts of all |
1046 | * power resources the device depends on and turn off the ones that have | |
1047 | * no more references. | |
bc9b6407 | 1048 | */ |
0aa120a0 | 1049 | acpi_device_set_power(device, ACPI_STATE_D3_COLD); |
3757b948 | 1050 | device->handle = NULL; |
cf860be6 | 1051 | put_device(&device->dev); |
1da177e4 LT |
1052 | } |
1053 | ||
9e89dde2 ZR |
1054 | /* -------------------------------------------------------------------------- |
1055 | Driver Management | |
1056 | -------------------------------------------------------------------------- */ | |
9e89dde2 ZR |
1057 | /** |
1058 | * acpi_bus_register_driver - register a driver with the ACPI bus | |
1059 | * @driver: driver being registered | |
1060 | * | |
1061 | * Registers a driver with the ACPI bus. Searches the namespace for all | |
1062 | * devices that match the driver's criteria and binds. Returns zero for | |
1063 | * success or a negative error status for failure. | |
1064 | */ | |
1065 | int acpi_bus_register_driver(struct acpi_driver *driver) | |
1da177e4 | 1066 | { |
1890a97a | 1067 | int ret; |
1da177e4 | 1068 | |
9e89dde2 ZR |
1069 | if (acpi_disabled) |
1070 | return -ENODEV; | |
1890a97a PM |
1071 | driver->drv.name = driver->name; |
1072 | driver->drv.bus = &acpi_bus_type; | |
1073 | driver->drv.owner = driver->owner; | |
1da177e4 | 1074 | |
1890a97a PM |
1075 | ret = driver_register(&driver->drv); |
1076 | return ret; | |
9e89dde2 | 1077 | } |
1da177e4 | 1078 | |
9e89dde2 ZR |
1079 | EXPORT_SYMBOL(acpi_bus_register_driver); |
1080 | ||
1081 | /** | |
b27b14ce | 1082 | * acpi_bus_unregister_driver - unregisters a driver with the ACPI bus |
9e89dde2 ZR |
1083 | * @driver: driver to unregister |
1084 | * | |
1085 | * Unregisters a driver with the ACPI bus. Searches the namespace for all | |
1086 | * devices that match the driver's criteria and unbinds. | |
1087 | */ | |
1088 | void acpi_bus_unregister_driver(struct acpi_driver *driver) | |
1089 | { | |
1890a97a | 1090 | driver_unregister(&driver->drv); |
9e89dde2 ZR |
1091 | } |
1092 | ||
1093 | EXPORT_SYMBOL(acpi_bus_unregister_driver); | |
1094 | ||
9e89dde2 ZR |
1095 | /* -------------------------------------------------------------------------- |
1096 | Device Enumeration | |
1097 | -------------------------------------------------------------------------- */ | |
5c478f49 BH |
1098 | static struct acpi_device *acpi_bus_get_parent(acpi_handle handle) |
1099 | { | |
456de893 | 1100 | struct acpi_device *device = NULL; |
5c478f49 | 1101 | acpi_status status; |
5c478f49 BH |
1102 | |
1103 | /* | |
1104 | * Fixed hardware devices do not appear in the namespace and do not | |
1105 | * have handles, but we fabricate acpi_devices for them, so we have | |
1106 | * to deal with them specially. | |
1107 | */ | |
456de893 | 1108 | if (!handle) |
5c478f49 BH |
1109 | return acpi_root; |
1110 | ||
1111 | do { | |
1112 | status = acpi_get_parent(handle, &handle); | |
5c478f49 | 1113 | if (ACPI_FAILURE(status)) |
456de893 RW |
1114 | return status == AE_NULL_ENTRY ? NULL : acpi_root; |
1115 | } while (acpi_bus_get_device(handle, &device)); | |
1116 | return device; | |
5c478f49 BH |
1117 | } |
1118 | ||
9e89dde2 ZR |
1119 | acpi_status |
1120 | acpi_bus_get_ejd(acpi_handle handle, acpi_handle *ejd) | |
1121 | { | |
1122 | acpi_status status; | |
1123 | acpi_handle tmp; | |
1124 | struct acpi_buffer buffer = {ACPI_ALLOCATE_BUFFER, NULL}; | |
1125 | union acpi_object *obj; | |
1126 | ||
1127 | status = acpi_get_handle(handle, "_EJD", &tmp); | |
1128 | if (ACPI_FAILURE(status)) | |
1129 | return status; | |
1130 | ||
1131 | status = acpi_evaluate_object(handle, "_EJD", NULL, &buffer); | |
1132 | if (ACPI_SUCCESS(status)) { | |
1133 | obj = buffer.pointer; | |
3b5fee59 HM |
1134 | status = acpi_get_handle(ACPI_ROOT_OBJECT, obj->string.pointer, |
1135 | ejd); | |
9e89dde2 ZR |
1136 | kfree(buffer.pointer); |
1137 | } | |
1138 | return status; | |
1139 | } | |
1140 | EXPORT_SYMBOL_GPL(acpi_bus_get_ejd); | |
1141 | ||
e88c9c60 RW |
1142 | static int acpi_bus_extract_wakeup_device_power_package(acpi_handle handle, |
1143 | struct acpi_device_wakeup *wakeup) | |
9e89dde2 | 1144 | { |
b581a7f9 RW |
1145 | struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; |
1146 | union acpi_object *package = NULL; | |
9e89dde2 | 1147 | union acpi_object *element = NULL; |
b581a7f9 | 1148 | acpi_status status; |
e88c9c60 | 1149 | int err = -ENODATA; |
9e89dde2 | 1150 | |
b581a7f9 | 1151 | if (!wakeup) |
e88c9c60 | 1152 | return -EINVAL; |
9e89dde2 | 1153 | |
993cbe59 | 1154 | INIT_LIST_HEAD(&wakeup->resources); |
9e89dde2 | 1155 | |
b581a7f9 RW |
1156 | /* _PRW */ |
1157 | status = acpi_evaluate_object(handle, "_PRW", NULL, &buffer); | |
1158 | if (ACPI_FAILURE(status)) { | |
1159 | ACPI_EXCEPTION((AE_INFO, status, "Evaluating _PRW")); | |
e88c9c60 | 1160 | return err; |
b581a7f9 RW |
1161 | } |
1162 | ||
1163 | package = (union acpi_object *)buffer.pointer; | |
1164 | ||
e88c9c60 | 1165 | if (!package || package->package.count < 2) |
b581a7f9 | 1166 | goto out; |
b581a7f9 | 1167 | |
9e89dde2 | 1168 | element = &(package->package.elements[0]); |
e88c9c60 | 1169 | if (!element) |
b581a7f9 | 1170 | goto out; |
e88c9c60 | 1171 | |
9e89dde2 ZR |
1172 | if (element->type == ACPI_TYPE_PACKAGE) { |
1173 | if ((element->package.count < 2) || | |
1174 | (element->package.elements[0].type != | |
1175 | ACPI_TYPE_LOCAL_REFERENCE) | |
e88c9c60 | 1176 | || (element->package.elements[1].type != ACPI_TYPE_INTEGER)) |
b581a7f9 | 1177 | goto out; |
e88c9c60 | 1178 | |
b581a7f9 | 1179 | wakeup->gpe_device = |
9e89dde2 | 1180 | element->package.elements[0].reference.handle; |
b581a7f9 | 1181 | wakeup->gpe_number = |
9e89dde2 ZR |
1182 | (u32) element->package.elements[1].integer.value; |
1183 | } else if (element->type == ACPI_TYPE_INTEGER) { | |
b581a7f9 RW |
1184 | wakeup->gpe_device = NULL; |
1185 | wakeup->gpe_number = element->integer.value; | |
1186 | } else { | |
b581a7f9 RW |
1187 | goto out; |
1188 | } | |
9e89dde2 ZR |
1189 | |
1190 | element = &(package->package.elements[1]); | |
e88c9c60 | 1191 | if (element->type != ACPI_TYPE_INTEGER) |
b581a7f9 | 1192 | goto out; |
e88c9c60 | 1193 | |
b581a7f9 | 1194 | wakeup->sleep_state = element->integer.value; |
9e89dde2 | 1195 | |
e88c9c60 RW |
1196 | err = acpi_extract_power_resources(package, 2, &wakeup->resources); |
1197 | if (err) | |
b581a7f9 | 1198 | goto out; |
9e89dde2 | 1199 | |
0596a52b RW |
1200 | if (!list_empty(&wakeup->resources)) { |
1201 | int sleep_state; | |
9e89dde2 | 1202 | |
b5d667eb RW |
1203 | err = acpi_power_wakeup_list_init(&wakeup->resources, |
1204 | &sleep_state); | |
1205 | if (err) { | |
1206 | acpi_handle_warn(handle, "Retrieving current states " | |
1207 | "of wakeup power resources failed\n"); | |
1208 | acpi_power_resources_list_free(&wakeup->resources); | |
1209 | goto out; | |
1210 | } | |
0596a52b RW |
1211 | if (sleep_state < wakeup->sleep_state) { |
1212 | acpi_handle_warn(handle, "Overriding _PRW sleep state " | |
1213 | "(S%d) by S%d from power resources\n", | |
1214 | (int)wakeup->sleep_state, sleep_state); | |
1215 | wakeup->sleep_state = sleep_state; | |
1216 | } | |
1217 | } | |
bba63a29 | 1218 | acpi_setup_gpe_for_wake(handle, wakeup->gpe_device, wakeup->gpe_number); |
9874647b | 1219 | |
b581a7f9 RW |
1220 | out: |
1221 | kfree(buffer.pointer); | |
e88c9c60 | 1222 | return err; |
1da177e4 LT |
1223 | } |
1224 | ||
f517709d | 1225 | static void acpi_bus_set_run_wake_flags(struct acpi_device *device) |
1da177e4 | 1226 | { |
29b71a1c | 1227 | struct acpi_device_id button_device_ids[] = { |
29b71a1c | 1228 | {"PNP0C0C", 0}, |
b7e38304 | 1229 | {"PNP0C0D", 0}, |
29b71a1c TR |
1230 | {"PNP0C0E", 0}, |
1231 | {"", 0}, | |
1232 | }; | |
f517709d RW |
1233 | acpi_status status; |
1234 | acpi_event_status event_status; | |
1235 | ||
b67ea761 | 1236 | device->wakeup.flags.notifier_present = 0; |
f517709d RW |
1237 | |
1238 | /* Power button, Lid switch always enable wakeup */ | |
1239 | if (!acpi_match_device_ids(device, button_device_ids)) { | |
1240 | device->wakeup.flags.run_wake = 1; | |
b7e38304 ZR |
1241 | if (!acpi_match_device_ids(device, &button_device_ids[1])) { |
1242 | /* Do not use Lid/sleep button for S5 wakeup */ | |
1243 | if (device->wakeup.sleep_state == ACPI_STATE_S5) | |
1244 | device->wakeup.sleep_state = ACPI_STATE_S4; | |
1245 | } | |
f2b56bc8 | 1246 | device_set_wakeup_capable(&device->dev, true); |
f517709d RW |
1247 | return; |
1248 | } | |
1249 | ||
e8e18c95 RW |
1250 | status = acpi_get_gpe_status(device->wakeup.gpe_device, |
1251 | device->wakeup.gpe_number, | |
1252 | &event_status); | |
f517709d RW |
1253 | if (status == AE_OK) |
1254 | device->wakeup.flags.run_wake = | |
1255 | !!(event_status & ACPI_EVENT_FLAG_HANDLE); | |
1256 | } | |
1257 | ||
d57d09a4 | 1258 | static void acpi_bus_get_wakeup_device_flags(struct acpi_device *device) |
f517709d | 1259 | { |
e88c9c60 | 1260 | int err; |
29b71a1c | 1261 | |
d57d09a4 | 1262 | /* Presence of _PRW indicates wake capable */ |
952c63e9 | 1263 | if (!acpi_has_method(device->handle, "_PRW")) |
d57d09a4 RW |
1264 | return; |
1265 | ||
e88c9c60 RW |
1266 | err = acpi_bus_extract_wakeup_device_power_package(device->handle, |
1267 | &device->wakeup); | |
1268 | if (err) { | |
1269 | dev_err(&device->dev, "_PRW evaluation error: %d\n", err); | |
d57d09a4 | 1270 | return; |
9e89dde2 | 1271 | } |
1da177e4 | 1272 | |
9e89dde2 | 1273 | device->wakeup.flags.valid = 1; |
9b83ccd2 | 1274 | device->wakeup.prepare_count = 0; |
f517709d | 1275 | acpi_bus_set_run_wake_flags(device); |
729b2bdb ZY |
1276 | /* Call _PSW/_DSW object to disable its ability to wake the sleeping |
1277 | * system for the ACPI device with the _PRW object. | |
1278 | * The _PSW object is depreciated in ACPI 3.0 and is replaced by _DSW. | |
1279 | * So it is necessary to call _DSW object first. Only when it is not | |
1280 | * present will the _PSW object used. | |
1281 | */ | |
e88c9c60 RW |
1282 | err = acpi_device_sleep_wake(device, 0, 0, 0); |
1283 | if (err) | |
77e76609 RW |
1284 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
1285 | "error in _DSW or _PSW evaluation\n")); | |
1da177e4 | 1286 | } |
1da177e4 | 1287 | |
f33ce568 RW |
1288 | static void acpi_bus_init_power_state(struct acpi_device *device, int state) |
1289 | { | |
1290 | struct acpi_device_power_state *ps = &device->power.states[state]; | |
ef85bdbe RW |
1291 | char pathname[5] = { '_', 'P', 'R', '0' + state, '\0' }; |
1292 | struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; | |
f33ce568 | 1293 | acpi_status status; |
bf325f95 | 1294 | |
f33ce568 RW |
1295 | INIT_LIST_HEAD(&ps->resources); |
1296 | ||
ef85bdbe RW |
1297 | /* Evaluate "_PRx" to get referenced power resources */ |
1298 | status = acpi_evaluate_object(device->handle, pathname, NULL, &buffer); | |
1299 | if (ACPI_SUCCESS(status)) { | |
1300 | union acpi_object *package = buffer.pointer; | |
1301 | ||
1302 | if (buffer.length && package | |
1303 | && package->type == ACPI_TYPE_PACKAGE | |
1304 | && package->package.count) { | |
e88c9c60 RW |
1305 | int err = acpi_extract_power_resources(package, 0, |
1306 | &ps->resources); | |
1307 | if (!err) | |
ef85bdbe | 1308 | device->power.flags.power_resources = 1; |
f33ce568 | 1309 | } |
ef85bdbe | 1310 | ACPI_FREE(buffer.pointer); |
f33ce568 RW |
1311 | } |
1312 | ||
1313 | /* Evaluate "_PSx" to see if we can do explicit sets */ | |
ef85bdbe | 1314 | pathname[2] = 'S'; |
952c63e9 | 1315 | if (acpi_has_method(device->handle, pathname)) |
f33ce568 RW |
1316 | ps->flags.explicit_set = 1; |
1317 | ||
1318 | /* | |
1319 | * State is valid if there are means to put the device into it. | |
1320 | * D3hot is only valid if _PR3 present. | |
1321 | */ | |
ef85bdbe | 1322 | if (!list_empty(&ps->resources) |
f33ce568 RW |
1323 | || (ps->flags.explicit_set && state < ACPI_STATE_D3_HOT)) { |
1324 | ps->flags.valid = 1; | |
1325 | ps->flags.os_accessible = 1; | |
1326 | } | |
1327 | ||
1328 | ps->power = -1; /* Unknown - driver assigned */ | |
1329 | ps->latency = -1; /* Unknown - driver assigned */ | |
1330 | } | |
1331 | ||
d43e167d | 1332 | static void acpi_bus_get_power_flags(struct acpi_device *device) |
1da177e4 | 1333 | { |
8bc5053b | 1334 | u32 i; |
1a365616 | 1335 | |
d43e167d | 1336 | /* Presence of _PS0|_PR0 indicates 'power manageable' */ |
952c63e9 JL |
1337 | if (!acpi_has_method(device->handle, "_PS0") && |
1338 | !acpi_has_method(device->handle, "_PR0")) | |
1339 | return; | |
1a365616 | 1340 | |
d43e167d | 1341 | device->flags.power_manageable = 1; |
4be44fcd | 1342 | |
9e89dde2 ZR |
1343 | /* |
1344 | * Power Management Flags | |
1345 | */ | |
952c63e9 | 1346 | if (acpi_has_method(device->handle, "_PSC")) |
9e89dde2 | 1347 | device->power.flags.explicit_get = 1; |
952c63e9 | 1348 | if (acpi_has_method(device->handle, "_IRC")) |
9e89dde2 | 1349 | device->power.flags.inrush_current = 1; |
1da177e4 | 1350 | |
9e89dde2 ZR |
1351 | /* |
1352 | * Enumerate supported power management states | |
1353 | */ | |
f33ce568 RW |
1354 | for (i = ACPI_STATE_D0; i <= ACPI_STATE_D3_HOT; i++) |
1355 | acpi_bus_init_power_state(device, i); | |
bf325f95 | 1356 | |
0b224527 | 1357 | INIT_LIST_HEAD(&device->power.states[ACPI_STATE_D3_COLD].resources); |
1da177e4 | 1358 | |
9e89dde2 ZR |
1359 | /* Set defaults for D0 and D3 states (always valid) */ |
1360 | device->power.states[ACPI_STATE_D0].flags.valid = 1; | |
1361 | device->power.states[ACPI_STATE_D0].power = 100; | |
8ad928d5 RW |
1362 | device->power.states[ACPI_STATE_D3_COLD].flags.valid = 1; |
1363 | device->power.states[ACPI_STATE_D3_COLD].power = 0; | |
c8f7a62c | 1364 | |
5c7dd710 RW |
1365 | /* Set D3cold's explicit_set flag if _PS3 exists. */ |
1366 | if (device->power.states[ACPI_STATE_D3_HOT].flags.explicit_set) | |
1367 | device->power.states[ACPI_STATE_D3_COLD].flags.explicit_set = 1; | |
1368 | ||
1399dfcd AL |
1369 | /* Presence of _PS3 or _PRx means we can put the device into D3 cold */ |
1370 | if (device->power.states[ACPI_STATE_D3_HOT].flags.explicit_set || | |
1371 | device->power.flags.power_resources) | |
1372 | device->power.states[ACPI_STATE_D3_COLD].flags.os_accessible = 1; | |
1373 | ||
b3785492 RW |
1374 | if (acpi_bus_init_power(device)) { |
1375 | acpi_free_power_resources_lists(device); | |
1376 | device->flags.power_manageable = 0; | |
1377 | } | |
9e89dde2 | 1378 | } |
c8f7a62c | 1379 | |
d43e167d | 1380 | static void acpi_bus_get_flags(struct acpi_device *device) |
1da177e4 | 1381 | { |
1da177e4 | 1382 | /* Presence of _STA indicates 'dynamic_status' */ |
952c63e9 | 1383 | if (acpi_has_method(device->handle, "_STA")) |
1da177e4 LT |
1384 | device->flags.dynamic_status = 1; |
1385 | ||
1da177e4 | 1386 | /* Presence of _RMV indicates 'removable' */ |
952c63e9 | 1387 | if (acpi_has_method(device->handle, "_RMV")) |
1da177e4 LT |
1388 | device->flags.removable = 1; |
1389 | ||
1390 | /* Presence of _EJD|_EJ0 indicates 'ejectable' */ | |
952c63e9 JL |
1391 | if (acpi_has_method(device->handle, "_EJD") || |
1392 | acpi_has_method(device->handle, "_EJ0")) | |
1da177e4 | 1393 | device->flags.ejectable = 1; |
1da177e4 LT |
1394 | } |
1395 | ||
c7bcb4e9 | 1396 | static void acpi_device_get_busid(struct acpi_device *device) |
1da177e4 | 1397 | { |
4be44fcd LB |
1398 | char bus_id[5] = { '?', 0 }; |
1399 | struct acpi_buffer buffer = { sizeof(bus_id), bus_id }; | |
1400 | int i = 0; | |
1da177e4 LT |
1401 | |
1402 | /* | |
1403 | * Bus ID | |
1404 | * ------ | |
1405 | * The device's Bus ID is simply the object name. | |
1406 | * TBD: Shouldn't this value be unique (within the ACPI namespace)? | |
1407 | */ | |
859ac9a4 | 1408 | if (ACPI_IS_ROOT_DEVICE(device)) { |
1da177e4 | 1409 | strcpy(device->pnp.bus_id, "ACPI"); |
859ac9a4 BH |
1410 | return; |
1411 | } | |
1412 | ||
1413 | switch (device->device_type) { | |
1da177e4 LT |
1414 | case ACPI_BUS_TYPE_POWER_BUTTON: |
1415 | strcpy(device->pnp.bus_id, "PWRF"); | |
1416 | break; | |
1417 | case ACPI_BUS_TYPE_SLEEP_BUTTON: | |
1418 | strcpy(device->pnp.bus_id, "SLPF"); | |
1419 | break; | |
1420 | default: | |
66b7ed40 | 1421 | acpi_get_name(device->handle, ACPI_SINGLE_NAME, &buffer); |
1da177e4 LT |
1422 | /* Clean up trailing underscores (if any) */ |
1423 | for (i = 3; i > 1; i--) { | |
1424 | if (bus_id[i] == '_') | |
1425 | bus_id[i] = '\0'; | |
1426 | else | |
1427 | break; | |
1428 | } | |
1429 | strcpy(device->pnp.bus_id, bus_id); | |
1430 | break; | |
1431 | } | |
1432 | } | |
1433 | ||
ebf4df8d JL |
1434 | /* |
1435 | * acpi_ata_match - see if an acpi object is an ATA device | |
1436 | * | |
1437 | * If an acpi object has one of the ACPI ATA methods defined, | |
1438 | * then we can safely call it an ATA device. | |
1439 | */ | |
1440 | bool acpi_ata_match(acpi_handle handle) | |
1441 | { | |
1442 | return acpi_has_method(handle, "_GTF") || | |
1443 | acpi_has_method(handle, "_GTM") || | |
1444 | acpi_has_method(handle, "_STM") || | |
1445 | acpi_has_method(handle, "_SDD"); | |
1446 | } | |
1447 | ||
54735266 | 1448 | /* |
d4e1a692 | 1449 | * acpi_bay_match - see if an acpi object is an ejectable driver bay |
54735266 ZR |
1450 | * |
1451 | * If an acpi object is ejectable and has one of the ACPI ATA methods defined, | |
1452 | * then we can safely call it an ejectable drive bay | |
1453 | */ | |
ebf4df8d | 1454 | bool acpi_bay_match(acpi_handle handle) |
d4e1a692 | 1455 | { |
54735266 ZR |
1456 | acpi_handle phandle; |
1457 | ||
952c63e9 | 1458 | if (!acpi_has_method(handle, "_EJ0")) |
ebf4df8d JL |
1459 | return false; |
1460 | if (acpi_ata_match(handle)) | |
1461 | return true; | |
1462 | if (ACPI_FAILURE(acpi_get_parent(handle, &phandle))) | |
1463 | return false; | |
54735266 | 1464 | |
ebf4df8d | 1465 | return acpi_ata_match(phandle); |
54735266 ZR |
1466 | } |
1467 | ||
3620f2f2 | 1468 | /* |
d4e1a692 | 1469 | * acpi_dock_match - see if an acpi object has a _DCK method |
3620f2f2 | 1470 | */ |
ebf4df8d | 1471 | bool acpi_dock_match(acpi_handle handle) |
3620f2f2 | 1472 | { |
ebf4df8d | 1473 | return acpi_has_method(handle, "_DCK"); |
3620f2f2 FS |
1474 | } |
1475 | ||
620e112c | 1476 | const char *acpi_device_hid(struct acpi_device *device) |
15b8dd53 | 1477 | { |
7f47fa6c | 1478 | struct acpi_hardware_id *hid; |
15b8dd53 | 1479 | |
2b2ae7c7 TR |
1480 | if (list_empty(&device->pnp.ids)) |
1481 | return dummy_hid; | |
1482 | ||
7f47fa6c BH |
1483 | hid = list_first_entry(&device->pnp.ids, struct acpi_hardware_id, list); |
1484 | return hid->id; | |
1485 | } | |
1486 | EXPORT_SYMBOL(acpi_device_hid); | |
15b8dd53 | 1487 | |
d4e1a692 | 1488 | static void acpi_add_id(struct acpi_device_pnp *pnp, const char *dev_id) |
7f47fa6c BH |
1489 | { |
1490 | struct acpi_hardware_id *id; | |
15b8dd53 | 1491 | |
7f47fa6c BH |
1492 | id = kmalloc(sizeof(*id), GFP_KERNEL); |
1493 | if (!id) | |
1494 | return; | |
15b8dd53 | 1495 | |
581de59e | 1496 | id->id = kstrdup(dev_id, GFP_KERNEL); |
7f47fa6c BH |
1497 | if (!id->id) { |
1498 | kfree(id); | |
1499 | return; | |
15b8dd53 BM |
1500 | } |
1501 | ||
d4e1a692 TK |
1502 | list_add_tail(&id->list, &pnp->ids); |
1503 | pnp->type.hardware_id = 1; | |
15b8dd53 BM |
1504 | } |
1505 | ||
222e82ac DW |
1506 | /* |
1507 | * Old IBM workstations have a DSDT bug wherein the SMBus object | |
1508 | * lacks the SMBUS01 HID and the methods do not have the necessary "_" | |
1509 | * prefix. Work around this. | |
1510 | */ | |
ebf4df8d | 1511 | static bool acpi_ibm_smbus_match(acpi_handle handle) |
222e82ac | 1512 | { |
ebf4df8d JL |
1513 | char node_name[ACPI_PATH_SEGMENT_LENGTH]; |
1514 | struct acpi_buffer path = { sizeof(node_name), node_name }; | |
222e82ac DW |
1515 | |
1516 | if (!dmi_name_in_vendors("IBM")) | |
ebf4df8d | 1517 | return false; |
222e82ac DW |
1518 | |
1519 | /* Look for SMBS object */ | |
ebf4df8d JL |
1520 | if (ACPI_FAILURE(acpi_get_name(handle, ACPI_SINGLE_NAME, &path)) || |
1521 | strcmp("SMBS", path.pointer)) | |
1522 | return false; | |
222e82ac DW |
1523 | |
1524 | /* Does it have the necessary (but misnamed) methods? */ | |
952c63e9 JL |
1525 | if (acpi_has_method(handle, "SBI") && |
1526 | acpi_has_method(handle, "SBR") && | |
1527 | acpi_has_method(handle, "SBW")) | |
ebf4df8d JL |
1528 | return true; |
1529 | ||
1530 | return false; | |
222e82ac DW |
1531 | } |
1532 | ||
c0af4175 TK |
1533 | static void acpi_set_pnp_ids(acpi_handle handle, struct acpi_device_pnp *pnp, |
1534 | int device_type) | |
1da177e4 | 1535 | { |
4be44fcd | 1536 | acpi_status status; |
57f3674f | 1537 | struct acpi_device_info *info; |
78e25fef | 1538 | struct acpi_pnp_device_id_list *cid_list; |
7f47fa6c | 1539 | int i; |
1da177e4 | 1540 | |
c0af4175 | 1541 | switch (device_type) { |
1da177e4 | 1542 | case ACPI_BUS_TYPE_DEVICE: |
c0af4175 TK |
1543 | if (handle == ACPI_ROOT_OBJECT) { |
1544 | acpi_add_id(pnp, ACPI_SYSTEM_HID); | |
859ac9a4 BH |
1545 | break; |
1546 | } | |
1547 | ||
c0af4175 | 1548 | status = acpi_get_object_info(handle, &info); |
1da177e4 | 1549 | if (ACPI_FAILURE(status)) { |
c0af4175 TK |
1550 | pr_err(PREFIX "%s: Error reading device info\n", |
1551 | __func__); | |
1da177e4 LT |
1552 | return; |
1553 | } | |
1554 | ||
1da177e4 | 1555 | if (info->valid & ACPI_VALID_HID) |
c0af4175 | 1556 | acpi_add_id(pnp, info->hardware_id.string); |
57f3674f | 1557 | if (info->valid & ACPI_VALID_CID) { |
15b8dd53 | 1558 | cid_list = &info->compatible_id_list; |
57f3674f | 1559 | for (i = 0; i < cid_list->count; i++) |
c0af4175 | 1560 | acpi_add_id(pnp, cid_list->ids[i].string); |
57f3674f | 1561 | } |
1da177e4 | 1562 | if (info->valid & ACPI_VALID_ADR) { |
c0af4175 TK |
1563 | pnp->bus_address = info->address; |
1564 | pnp->type.bus_address = 1; | |
1da177e4 | 1565 | } |
ccf78040 | 1566 | if (info->valid & ACPI_VALID_UID) |
c0af4175 | 1567 | pnp->unique_id = kstrdup(info->unique_id.string, |
ccf78040 | 1568 | GFP_KERNEL); |
ae843332 | 1569 | |
a83893ae BH |
1570 | kfree(info); |
1571 | ||
57f3674f BH |
1572 | /* |
1573 | * Some devices don't reliably have _HIDs & _CIDs, so add | |
1574 | * synthetic HIDs to make sure drivers can find them. | |
1575 | */ | |
c0af4175 TK |
1576 | if (acpi_is_video_device(handle)) |
1577 | acpi_add_id(pnp, ACPI_VIDEO_HID); | |
ebf4df8d | 1578 | else if (acpi_bay_match(handle)) |
c0af4175 | 1579 | acpi_add_id(pnp, ACPI_BAY_HID); |
ebf4df8d | 1580 | else if (acpi_dock_match(handle)) |
c0af4175 | 1581 | acpi_add_id(pnp, ACPI_DOCK_HID); |
ebf4df8d | 1582 | else if (acpi_ibm_smbus_match(handle)) |
c0af4175 TK |
1583 | acpi_add_id(pnp, ACPI_SMBUS_IBM_HID); |
1584 | else if (list_empty(&pnp->ids) && handle == ACPI_ROOT_OBJECT) { | |
1585 | acpi_add_id(pnp, ACPI_BUS_HID); /* \_SB, LNXSYBUS */ | |
1586 | strcpy(pnp->device_name, ACPI_BUS_DEVICE_NAME); | |
1587 | strcpy(pnp->device_class, ACPI_BUS_CLASS); | |
b7b30de5 | 1588 | } |
54735266 | 1589 | |
1da177e4 LT |
1590 | break; |
1591 | case ACPI_BUS_TYPE_POWER: | |
c0af4175 | 1592 | acpi_add_id(pnp, ACPI_POWER_HID); |
1da177e4 LT |
1593 | break; |
1594 | case ACPI_BUS_TYPE_PROCESSOR: | |
c0af4175 | 1595 | acpi_add_id(pnp, ACPI_PROCESSOR_OBJECT_HID); |
1da177e4 | 1596 | break; |
1da177e4 | 1597 | case ACPI_BUS_TYPE_THERMAL: |
c0af4175 | 1598 | acpi_add_id(pnp, ACPI_THERMAL_HID); |
1da177e4 LT |
1599 | break; |
1600 | case ACPI_BUS_TYPE_POWER_BUTTON: | |
c0af4175 | 1601 | acpi_add_id(pnp, ACPI_BUTTON_HID_POWERF); |
1da177e4 LT |
1602 | break; |
1603 | case ACPI_BUS_TYPE_SLEEP_BUTTON: | |
c0af4175 | 1604 | acpi_add_id(pnp, ACPI_BUTTON_HID_SLEEPF); |
1da177e4 LT |
1605 | break; |
1606 | } | |
1da177e4 LT |
1607 | } |
1608 | ||
c0af4175 TK |
1609 | void acpi_free_pnp_ids(struct acpi_device_pnp *pnp) |
1610 | { | |
1611 | struct acpi_hardware_id *id, *tmp; | |
1612 | ||
1613 | list_for_each_entry_safe(id, tmp, &pnp->ids, list) { | |
1614 | kfree(id->id); | |
1615 | kfree(id); | |
1616 | } | |
1617 | kfree(pnp->unique_id); | |
1618 | } | |
1619 | ||
82c7d5ef RW |
1620 | void acpi_init_device_object(struct acpi_device *device, acpi_handle handle, |
1621 | int type, unsigned long long sta) | |
1da177e4 | 1622 | { |
d43e167d RW |
1623 | INIT_LIST_HEAD(&device->pnp.ids); |
1624 | device->device_type = type; | |
1625 | device->handle = handle; | |
1626 | device->parent = acpi_bus_get_parent(handle); | |
1627 | STRUCT_TO_INT(device->status) = sta; | |
1628 | acpi_device_get_busid(device); | |
c0af4175 | 1629 | acpi_set_pnp_ids(handle, &device->pnp, type); |
d43e167d | 1630 | acpi_bus_get_flags(device); |
2c0d4fe0 | 1631 | device->flags.match_driver = false; |
cf860be6 RW |
1632 | device_initialize(&device->dev); |
1633 | dev_set_uevent_suppress(&device->dev, true); | |
1634 | } | |
bc3b0772 | 1635 | |
cf860be6 RW |
1636 | void acpi_device_add_finalize(struct acpi_device *device) |
1637 | { | |
1638 | dev_set_uevent_suppress(&device->dev, false); | |
1639 | kobject_uevent(&device->dev.kobj, KOBJ_ADD); | |
1da177e4 LT |
1640 | } |
1641 | ||
5c478f49 BH |
1642 | static int acpi_add_single_object(struct acpi_device **child, |
1643 | acpi_handle handle, int type, | |
2c0d4fe0 | 1644 | unsigned long long sta) |
1da177e4 | 1645 | { |
77c24888 BH |
1646 | int result; |
1647 | struct acpi_device *device; | |
29aaefa6 | 1648 | struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; |
1da177e4 | 1649 | |
36bcbec7 | 1650 | device = kzalloc(sizeof(struct acpi_device), GFP_KERNEL); |
1da177e4 | 1651 | if (!device) { |
6468463a | 1652 | printk(KERN_ERR PREFIX "Memory allocation error\n"); |
d550d98d | 1653 | return -ENOMEM; |
1da177e4 | 1654 | } |
1da177e4 | 1655 | |
d43e167d RW |
1656 | acpi_init_device_object(device, handle, type, sta); |
1657 | acpi_bus_get_power_flags(device); | |
d57d09a4 | 1658 | acpi_bus_get_wakeup_device_flags(device); |
1da177e4 | 1659 | |
cf860be6 | 1660 | result = acpi_device_add(device, acpi_device_release); |
d43e167d | 1661 | if (result) { |
718fb0de | 1662 | acpi_device_release(&device->dev); |
d43e167d RW |
1663 | return result; |
1664 | } | |
1da177e4 | 1665 | |
d43e167d | 1666 | acpi_power_add_remove_device(device, true); |
cf860be6 | 1667 | acpi_device_add_finalize(device); |
d43e167d RW |
1668 | acpi_get_name(handle, ACPI_FULL_PATHNAME, &buffer); |
1669 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Added %s [%s] parent %s\n", | |
1670 | dev_name(&device->dev), (char *) buffer.pointer, | |
1671 | device->parent ? dev_name(&device->parent->dev) : "(null)")); | |
1672 | kfree(buffer.pointer); | |
1673 | *child = device; | |
1674 | return 0; | |
bf325f95 RW |
1675 | } |
1676 | ||
778cbc1d BH |
1677 | static int acpi_bus_type_and_status(acpi_handle handle, int *type, |
1678 | unsigned long long *sta) | |
1da177e4 | 1679 | { |
778cbc1d BH |
1680 | acpi_status status; |
1681 | acpi_object_type acpi_type; | |
1da177e4 | 1682 | |
778cbc1d | 1683 | status = acpi_get_type(handle, &acpi_type); |
51a85faf | 1684 | if (ACPI_FAILURE(status)) |
778cbc1d | 1685 | return -ENODEV; |
4be44fcd | 1686 | |
778cbc1d | 1687 | switch (acpi_type) { |
51a85faf BH |
1688 | case ACPI_TYPE_ANY: /* for ACPI_ROOT_OBJECT */ |
1689 | case ACPI_TYPE_DEVICE: | |
778cbc1d BH |
1690 | *type = ACPI_BUS_TYPE_DEVICE; |
1691 | status = acpi_bus_get_status_handle(handle, sta); | |
1692 | if (ACPI_FAILURE(status)) | |
1693 | return -ENODEV; | |
51a85faf BH |
1694 | break; |
1695 | case ACPI_TYPE_PROCESSOR: | |
778cbc1d BH |
1696 | *type = ACPI_BUS_TYPE_PROCESSOR; |
1697 | status = acpi_bus_get_status_handle(handle, sta); | |
1698 | if (ACPI_FAILURE(status)) | |
1699 | return -ENODEV; | |
51a85faf BH |
1700 | break; |
1701 | case ACPI_TYPE_THERMAL: | |
778cbc1d BH |
1702 | *type = ACPI_BUS_TYPE_THERMAL; |
1703 | *sta = ACPI_STA_DEFAULT; | |
51a85faf BH |
1704 | break; |
1705 | case ACPI_TYPE_POWER: | |
778cbc1d BH |
1706 | *type = ACPI_BUS_TYPE_POWER; |
1707 | *sta = ACPI_STA_DEFAULT; | |
51a85faf BH |
1708 | break; |
1709 | default: | |
778cbc1d | 1710 | return -ENODEV; |
51a85faf | 1711 | } |
1da177e4 | 1712 | |
778cbc1d BH |
1713 | return 0; |
1714 | } | |
1715 | ||
4b59cc1f RW |
1716 | static bool acpi_scan_handler_matching(struct acpi_scan_handler *handler, |
1717 | char *idstr, | |
1718 | const struct acpi_device_id **matchid) | |
1719 | { | |
1720 | const struct acpi_device_id *devid; | |
1721 | ||
1722 | for (devid = handler->ids; devid->id[0]; devid++) | |
1723 | if (!strcmp((char *)devid->id, idstr)) { | |
1724 | if (matchid) | |
1725 | *matchid = devid; | |
1726 | ||
1727 | return true; | |
1728 | } | |
1729 | ||
1730 | return false; | |
1731 | } | |
1732 | ||
6b772e8f TK |
1733 | static struct acpi_scan_handler *acpi_scan_match_handler(char *idstr, |
1734 | const struct acpi_device_id **matchid) | |
1735 | { | |
1736 | struct acpi_scan_handler *handler; | |
1737 | ||
1738 | list_for_each_entry(handler, &acpi_scan_handlers_list, list_node) | |
1739 | if (acpi_scan_handler_matching(handler, idstr, matchid)) | |
1740 | return handler; | |
1741 | ||
1742 | return NULL; | |
1743 | } | |
1744 | ||
3f8055c3 RW |
1745 | void acpi_scan_hotplug_enabled(struct acpi_hotplug_profile *hotplug, bool val) |
1746 | { | |
3f8055c3 RW |
1747 | if (!!hotplug->enabled == !!val) |
1748 | return; | |
1749 | ||
1750 | mutex_lock(&acpi_scan_lock); | |
1751 | ||
1752 | hotplug->enabled = val; | |
3f8055c3 RW |
1753 | |
1754 | mutex_unlock(&acpi_scan_lock); | |
1755 | } | |
1756 | ||
6b772e8f | 1757 | static void acpi_scan_init_hotplug(acpi_handle handle, int type) |
a33ec399 | 1758 | { |
6b772e8f TK |
1759 | struct acpi_device_pnp pnp = {}; |
1760 | struct acpi_hardware_id *hwid; | |
a33ec399 RW |
1761 | struct acpi_scan_handler *handler; |
1762 | ||
6b772e8f TK |
1763 | INIT_LIST_HEAD(&pnp.ids); |
1764 | acpi_set_pnp_ids(handle, &pnp, type); | |
a33ec399 | 1765 | |
6b772e8f | 1766 | if (!pnp.type.hardware_id) |
7a26b530 | 1767 | goto out; |
a33ec399 RW |
1768 | |
1769 | /* | |
1770 | * This relies on the fact that acpi_install_notify_handler() will not | |
1771 | * install the same notify handler routine twice for the same handle. | |
1772 | */ | |
6b772e8f TK |
1773 | list_for_each_entry(hwid, &pnp.ids, list) { |
1774 | handler = acpi_scan_match_handler(hwid->id, NULL); | |
ca499fc8 | 1775 | if (handler && !handler->hotplug.ignore) { |
2cbb14fb TK |
1776 | acpi_install_notify_handler(handle, ACPI_SYSTEM_NOTIFY, |
1777 | acpi_hotplug_notify_cb, handler); | |
6b772e8f TK |
1778 | break; |
1779 | } | |
1780 | } | |
1781 | ||
7a26b530 | 1782 | out: |
6b772e8f | 1783 | acpi_free_pnp_ids(&pnp); |
a33ec399 RW |
1784 | } |
1785 | ||
e3863094 RW |
1786 | static acpi_status acpi_bus_check_add(acpi_handle handle, u32 lvl_not_used, |
1787 | void *not_used, void **return_value) | |
778cbc1d | 1788 | { |
805d410f | 1789 | struct acpi_device *device = NULL; |
778cbc1d BH |
1790 | int type; |
1791 | unsigned long long sta; | |
1792 | int result; | |
1793 | ||
4002bf38 RW |
1794 | acpi_bus_get_device(handle, &device); |
1795 | if (device) | |
1796 | goto out; | |
1797 | ||
778cbc1d BH |
1798 | result = acpi_bus_type_and_status(handle, &type, &sta); |
1799 | if (result) | |
1800 | return AE_OK; | |
1801 | ||
82c7d5ef RW |
1802 | if (type == ACPI_BUS_TYPE_POWER) { |
1803 | acpi_add_power_resource(handle); | |
1804 | return AE_OK; | |
1805 | } | |
1806 | ||
6b772e8f | 1807 | acpi_scan_init_hotplug(handle, type); |
a33ec399 | 1808 | |
778cbc1d | 1809 | if (!(sta & ACPI_STA_DEVICE_PRESENT) && |
b581a7f9 | 1810 | !(sta & ACPI_STA_DEVICE_FUNCTIONING)) { |
86e4e20e | 1811 | struct acpi_device_wakeup wakeup; |
86e4e20e | 1812 | |
952c63e9 | 1813 | if (acpi_has_method(handle, "_PRW")) { |
86e4e20e RW |
1814 | acpi_bus_extract_wakeup_device_power_package(handle, |
1815 | &wakeup); | |
993cbe59 RW |
1816 | acpi_power_resources_list_free(&wakeup.resources); |
1817 | } | |
778cbc1d | 1818 | return AE_CTRL_DEPTH; |
b581a7f9 | 1819 | } |
778cbc1d | 1820 | |
2c0d4fe0 | 1821 | acpi_add_single_object(&device, handle, type, sta); |
e3b87f8a | 1822 | if (!device) |
51a85faf | 1823 | return AE_CTRL_DEPTH; |
1da177e4 | 1824 | |
4002bf38 | 1825 | out: |
51a85faf BH |
1826 | if (!*return_value) |
1827 | *return_value = device; | |
805d410f | 1828 | |
51a85faf BH |
1829 | return AE_OK; |
1830 | } | |
3fb02738 | 1831 | |
c5698074 | 1832 | static int acpi_scan_attach_handler(struct acpi_device *device) |
ca589f94 | 1833 | { |
c5698074 RW |
1834 | struct acpi_hardware_id *hwid; |
1835 | int ret = 0; | |
ca589f94 | 1836 | |
c5698074 | 1837 | list_for_each_entry(hwid, &device->pnp.ids, list) { |
87b85b3c | 1838 | const struct acpi_device_id *devid; |
c5698074 | 1839 | struct acpi_scan_handler *handler; |
ca589f94 | 1840 | |
c5698074 RW |
1841 | handler = acpi_scan_match_handler(hwid->id, &devid); |
1842 | if (handler) { | |
87b85b3c RW |
1843 | ret = handler->attach(device, devid); |
1844 | if (ret > 0) { | |
1845 | device->handler = handler; | |
c5698074 | 1846 | break; |
87b85b3c | 1847 | } else if (ret < 0) { |
c5698074 | 1848 | break; |
87b85b3c | 1849 | } |
ca589f94 RW |
1850 | } |
1851 | } | |
1852 | return ret; | |
1853 | } | |
1854 | ||
0fc300b0 RW |
1855 | static acpi_status acpi_bus_device_attach(acpi_handle handle, u32 lvl_not_used, |
1856 | void *not_used, void **ret_not_used) | |
51a85faf | 1857 | { |
805d410f RW |
1858 | struct acpi_device *device; |
1859 | unsigned long long sta_not_used; | |
ca589f94 | 1860 | int ret; |
3fb02738 | 1861 | |
805d410f RW |
1862 | /* |
1863 | * Ignore errors ignored by acpi_bus_check_add() to avoid terminating | |
1864 | * namespace walks prematurely. | |
1865 | */ | |
ca589f94 | 1866 | if (acpi_bus_type_and_status(handle, &ret, &sta_not_used)) |
805d410f | 1867 | return AE_OK; |
1da177e4 | 1868 | |
805d410f RW |
1869 | if (acpi_bus_get_device(handle, &device)) |
1870 | return AE_CTRL_DEPTH; | |
7779688f | 1871 | |
3a391a39 RW |
1872 | if (device->handler) |
1873 | return AE_OK; | |
1874 | ||
ca589f94 | 1875 | ret = acpi_scan_attach_handler(device); |
6931007c RW |
1876 | if (ret < 0) |
1877 | return AE_CTRL_DEPTH; | |
1878 | ||
1879 | device->flags.match_driver = true; | |
1880 | if (ret > 0) | |
1881 | return AE_OK; | |
ca589f94 RW |
1882 | |
1883 | ret = device_attach(&device->dev); | |
1884 | return ret >= 0 ? AE_OK : AE_CTRL_DEPTH; | |
1da177e4 | 1885 | } |
1da177e4 | 1886 | |
636458de | 1887 | /** |
b8bd759a | 1888 | * acpi_bus_scan - Add ACPI device node objects in a given namespace scope. |
636458de | 1889 | * @handle: Root of the namespace scope to scan. |
7779688f | 1890 | * |
636458de RW |
1891 | * Scan a given ACPI tree (probably recently hot-plugged) and create and add |
1892 | * found devices. | |
7779688f | 1893 | * |
636458de RW |
1894 | * If no devices were found, -ENODEV is returned, but it does not mean that |
1895 | * there has been a real error. There just have been no suitable ACPI objects | |
1896 | * in the table trunk from which the kernel could create a device and add an | |
1897 | * appropriate driver. | |
3757b948 RW |
1898 | * |
1899 | * Must be called under acpi_scan_lock. | |
7779688f | 1900 | */ |
b8bd759a | 1901 | int acpi_bus_scan(acpi_handle handle) |
3fb02738 | 1902 | { |
b8bd759a | 1903 | void *device = NULL; |
c511cc19 | 1904 | int error = 0; |
3fb02738 | 1905 | |
b8bd759a RW |
1906 | if (ACPI_SUCCESS(acpi_bus_check_add(handle, 0, NULL, &device))) |
1907 | acpi_walk_namespace(ACPI_TYPE_ANY, handle, ACPI_UINT32_MAX, | |
1908 | acpi_bus_check_add, NULL, NULL, &device); | |
3fb02738 | 1909 | |
d2f6650a | 1910 | if (!device) |
c511cc19 RW |
1911 | error = -ENODEV; |
1912 | else if (ACPI_SUCCESS(acpi_bus_device_attach(handle, 0, NULL, NULL))) | |
b8bd759a RW |
1913 | acpi_walk_namespace(ACPI_TYPE_ANY, handle, ACPI_UINT32_MAX, |
1914 | acpi_bus_device_attach, NULL, NULL, NULL); | |
3fb02738 | 1915 | |
c511cc19 | 1916 | return error; |
3fb02738 | 1917 | } |
b8bd759a | 1918 | EXPORT_SYMBOL(acpi_bus_scan); |
a2100801 | 1919 | |
05404d8f RW |
1920 | static acpi_status acpi_bus_device_detach(acpi_handle handle, u32 lvl_not_used, |
1921 | void *not_used, void **ret_not_used) | |
1922 | { | |
1923 | struct acpi_device *device = NULL; | |
a2100801 | 1924 | |
05404d8f | 1925 | if (!acpi_bus_get_device(handle, &device)) { |
ca589f94 RW |
1926 | struct acpi_scan_handler *dev_handler = device->handler; |
1927 | ||
ca589f94 RW |
1928 | if (dev_handler) { |
1929 | if (dev_handler->detach) | |
1930 | dev_handler->detach(device); | |
1931 | ||
1932 | device->handler = NULL; | |
1933 | } else { | |
1934 | device_release_driver(&device->dev); | |
1935 | } | |
05404d8f RW |
1936 | } |
1937 | return AE_OK; | |
3fb02738 | 1938 | } |
1da177e4 | 1939 | |
05404d8f RW |
1940 | static acpi_status acpi_bus_remove(acpi_handle handle, u32 lvl_not_used, |
1941 | void *not_used, void **ret_not_used) | |
1da177e4 | 1942 | { |
05404d8f | 1943 | struct acpi_device *device = NULL; |
4be44fcd | 1944 | |
05404d8f RW |
1945 | if (!acpi_bus_get_device(handle, &device)) |
1946 | acpi_device_unregister(device); | |
1da177e4 | 1947 | |
05404d8f RW |
1948 | return AE_OK; |
1949 | } | |
1da177e4 | 1950 | |
3757b948 RW |
1951 | /** |
1952 | * acpi_bus_trim - Remove ACPI device node and all of its descendants | |
1953 | * @start: Root of the ACPI device nodes subtree to remove. | |
1954 | * | |
1955 | * Must be called under acpi_scan_lock. | |
1956 | */ | |
bfee26db | 1957 | void acpi_bus_trim(struct acpi_device *start) |
1da177e4 | 1958 | { |
05404d8f RW |
1959 | /* |
1960 | * Execute acpi_bus_device_detach() as a post-order callback to detach | |
1961 | * all ACPI drivers from the device nodes being removed. | |
1962 | */ | |
1963 | acpi_walk_namespace(ACPI_TYPE_ANY, start->handle, ACPI_UINT32_MAX, NULL, | |
1964 | acpi_bus_device_detach, NULL, NULL); | |
1965 | acpi_bus_device_detach(start->handle, 0, NULL, NULL); | |
cecdb193 RW |
1966 | /* |
1967 | * Execute acpi_bus_remove() as a post-order callback to remove device | |
1968 | * nodes in the given namespace scope. | |
1969 | */ | |
1970 | acpi_walk_namespace(ACPI_TYPE_ANY, start->handle, ACPI_UINT32_MAX, NULL, | |
1971 | acpi_bus_remove, NULL, NULL); | |
1972 | acpi_bus_remove(start->handle, 0, NULL, NULL); | |
1da177e4 | 1973 | } |
ceaba663 KA |
1974 | EXPORT_SYMBOL_GPL(acpi_bus_trim); |
1975 | ||
e8b945c9 | 1976 | static int acpi_bus_scan_fixed(void) |
1da177e4 | 1977 | { |
4be44fcd | 1978 | int result = 0; |
c4168bff | 1979 | |
1da177e4 LT |
1980 | /* |
1981 | * Enumerate all fixed-feature devices. | |
1982 | */ | |
2c0d4fe0 RW |
1983 | if (!(acpi_gbl_FADT.flags & ACPI_FADT_POWER_BUTTON)) { |
1984 | struct acpi_device *device = NULL; | |
1985 | ||
5c478f49 | 1986 | result = acpi_add_single_object(&device, NULL, |
c4168bff | 1987 | ACPI_BUS_TYPE_POWER_BUTTON, |
2c0d4fe0 RW |
1988 | ACPI_STA_DEFAULT); |
1989 | if (result) | |
1990 | return result; | |
1991 | ||
88346167 | 1992 | device->flags.match_driver = true; |
2c0d4fe0 RW |
1993 | result = device_attach(&device->dev); |
1994 | if (result < 0) | |
1995 | return result; | |
1996 | ||
c10d7a13 | 1997 | device_init_wakeup(&device->dev, true); |
3fb02738 | 1998 | } |
1da177e4 | 1999 | |
2c0d4fe0 RW |
2000 | if (!(acpi_gbl_FADT.flags & ACPI_FADT_SLEEP_BUTTON)) { |
2001 | struct acpi_device *device = NULL; | |
2002 | ||
5c478f49 | 2003 | result = acpi_add_single_object(&device, NULL, |
c4168bff | 2004 | ACPI_BUS_TYPE_SLEEP_BUTTON, |
2c0d4fe0 RW |
2005 | ACPI_STA_DEFAULT); |
2006 | if (result) | |
2007 | return result; | |
2008 | ||
88346167 | 2009 | device->flags.match_driver = true; |
2c0d4fe0 | 2010 | result = device_attach(&device->dev); |
3fb02738 | 2011 | } |
1da177e4 | 2012 | |
2c0d4fe0 | 2013 | return result < 0 ? result : 0; |
1da177e4 LT |
2014 | } |
2015 | ||
e747f274 | 2016 | int __init acpi_scan_init(void) |
1da177e4 LT |
2017 | { |
2018 | int result; | |
1da177e4 | 2019 | |
5b327265 PM |
2020 | result = bus_register(&acpi_bus_type); |
2021 | if (result) { | |
2022 | /* We don't want to quit even if we failed to add suspend/resume */ | |
2023 | printk(KERN_ERR PREFIX "Could not register bus type\n"); | |
2024 | } | |
2025 | ||
92ef2a25 | 2026 | acpi_pci_root_init(); |
4daeaf68 | 2027 | acpi_pci_link_init(); |
ac212b69 | 2028 | acpi_processor_init(); |
141a297b | 2029 | acpi_platform_init(); |
f58b082a | 2030 | acpi_lpss_init(); |
2fa97feb | 2031 | acpi_cmos_rtc_init(); |
737f1a9f | 2032 | acpi_container_init(); |
0a347644 | 2033 | acpi_memory_hotplug_init(); |
94add0f8 | 2034 | acpi_dock_init(); |
97d9a9e9 | 2035 | |
3757b948 | 2036 | mutex_lock(&acpi_scan_lock); |
1da177e4 LT |
2037 | /* |
2038 | * Enumerate devices in the ACPI namespace. | |
2039 | */ | |
0cd6ac52 RW |
2040 | result = acpi_bus_scan(ACPI_ROOT_OBJECT); |
2041 | if (result) | |
3757b948 | 2042 | goto out; |
1da177e4 | 2043 | |
0cd6ac52 | 2044 | result = acpi_bus_get_device(ACPI_ROOT_OBJECT, &acpi_root); |
1da177e4 | 2045 | if (result) |
3757b948 | 2046 | goto out; |
1da177e4 | 2047 | |
b8bd759a RW |
2048 | result = acpi_bus_scan_fixed(); |
2049 | if (result) { | |
b17b537a | 2050 | acpi_device_unregister(acpi_root); |
3757b948 | 2051 | goto out; |
b8bd759a | 2052 | } |
1da177e4 | 2053 | |
b8bd759a | 2054 | acpi_update_all_gpes(); |
3757b948 | 2055 | |
668192b6 YL |
2056 | acpi_pci_root_hp_init(); |
2057 | ||
3757b948 RW |
2058 | out: |
2059 | mutex_unlock(&acpi_scan_lock); | |
2060 | return result; | |
1da177e4 | 2061 | } |