]>
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 | ||
29b71a1c TR |
66 | /* |
67 | * Creates hid/cid(s) string needed for modalias and uevent | |
68 | * e.g. on a device with hid:IBM0001 and cid:ACPI0001 you get: | |
69 | * char *modalias: "acpi:IBM0001:ACPI0001" | |
70 | */ | |
b3e572d2 AB |
71 | static int create_modalias(struct acpi_device *acpi_dev, char *modalias, |
72 | int size) | |
73 | { | |
29b71a1c | 74 | int len; |
5c9fcb5d | 75 | int count; |
7f47fa6c | 76 | struct acpi_hardware_id *id; |
29b71a1c | 77 | |
2b2ae7c7 TR |
78 | if (list_empty(&acpi_dev->pnp.ids)) |
79 | return 0; | |
80 | ||
5c9fcb5d | 81 | len = snprintf(modalias, size, "acpi:"); |
29b71a1c TR |
82 | size -= len; |
83 | ||
7f47fa6c BH |
84 | list_for_each_entry(id, &acpi_dev->pnp.ids, list) { |
85 | count = snprintf(&modalias[len], size, "%s:", id->id); | |
5c9fcb5d ZR |
86 | if (count < 0 || count >= size) |
87 | return -EINVAL; | |
88 | len += count; | |
89 | size -= count; | |
90 | } | |
91 | ||
29b71a1c TR |
92 | modalias[len] = '\0'; |
93 | return len; | |
94 | } | |
95 | ||
96 | static ssize_t | |
97 | acpi_device_modalias_show(struct device *dev, struct device_attribute *attr, char *buf) { | |
98 | struct acpi_device *acpi_dev = to_acpi_device(dev); | |
99 | int len; | |
100 | ||
101 | /* Device has no HID and no CID or string is >1024 */ | |
102 | len = create_modalias(acpi_dev, buf, 1024); | |
103 | if (len <= 0) | |
104 | return 0; | |
105 | buf[len++] = '\n'; | |
106 | return len; | |
107 | } | |
108 | static DEVICE_ATTR(modalias, 0444, acpi_device_modalias_show, NULL); | |
109 | ||
a33ec399 | 110 | static int acpi_scan_hot_remove(struct acpi_device *device) |
1da177e4 | 111 | { |
5993c467 | 112 | acpi_handle handle = device->handle; |
a33ec399 | 113 | acpi_handle not_used; |
1da177e4 LT |
114 | struct acpi_object_list arg_list; |
115 | union acpi_object arg; | |
a33ec399 | 116 | acpi_status status; |
f058cdf4 | 117 | |
3757b948 | 118 | /* If there is no handle, the device node has been unregistered. */ |
a33ec399 | 119 | if (!handle) { |
3757b948 RW |
120 | dev_dbg(&device->dev, "ACPI handle missing\n"); |
121 | put_device(&device->dev); | |
a33ec399 | 122 | return -EINVAL; |
3757b948 RW |
123 | } |
124 | ||
26d46867 | 125 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
0794469d | 126 | "Hot-removing device %s...\n", dev_name(&device->dev))); |
26d46867 | 127 | |
bfee26db | 128 | acpi_bus_trim(device); |
3757b948 RW |
129 | /* Device node has been unregistered. */ |
130 | put_device(&device->dev); | |
b3c450c3 TK |
131 | device = NULL; |
132 | ||
a33ec399 | 133 | if (ACPI_SUCCESS(acpi_get_handle(handle, "_LCK", ¬_used))) { |
1da177e4 LT |
134 | arg_list.count = 1; |
135 | arg_list.pointer = &arg; | |
136 | arg.type = ACPI_TYPE_INTEGER; | |
137 | arg.integer.value = 0; | |
138 | acpi_evaluate_object(handle, "_LCK", &arg_list, NULL); | |
139 | } | |
1da177e4 | 140 | |
1da177e4 LT |
141 | arg_list.count = 1; |
142 | arg_list.pointer = &arg; | |
143 | arg.type = ACPI_TYPE_INTEGER; | |
144 | arg.integer.value = 1; | |
1da177e4 | 145 | |
1da177e4 LT |
146 | /* |
147 | * TBD: _EJD support. | |
148 | */ | |
1da177e4 | 149 | status = acpi_evaluate_object(handle, "_EJ0", &arg_list, NULL); |
c4753e57 | 150 | if (ACPI_FAILURE(status)) { |
a33ec399 RW |
151 | if (status == AE_NOT_FOUND) { |
152 | return -ENODEV; | |
153 | } else { | |
f058cdf4 | 154 | acpi_handle_warn(handle, "Eject failed\n"); |
a33ec399 RW |
155 | return -EIO; |
156 | } | |
157 | } | |
158 | return 0; | |
159 | } | |
1da177e4 | 160 | |
a33ec399 RW |
161 | static void acpi_bus_device_eject(void *context) |
162 | { | |
163 | acpi_handle handle = context; | |
164 | struct acpi_device *device = NULL; | |
165 | struct acpi_scan_handler *handler; | |
166 | u32 ost_code = ACPI_OST_SC_NON_SPECIFIC_FAILURE; | |
167 | ||
168 | mutex_lock(&acpi_scan_lock); | |
169 | ||
170 | acpi_bus_get_device(handle, &device); | |
171 | if (!device) | |
172 | goto err_out; | |
173 | ||
174 | handler = device->handler; | |
175 | if (!handler || !handler->hotplug.enabled) { | |
176 | ost_code = ACPI_OST_SC_EJECT_NOT_SUPPORTED; | |
177 | goto err_out; | |
178 | } | |
179 | acpi_evaluate_hotplug_ost(handle, ACPI_NOTIFY_EJECT_REQUEST, | |
180 | ACPI_OST_SC_EJECT_IN_PROGRESS, NULL); | |
181 | if (handler->hotplug.mode == AHM_CONTAINER) { | |
182 | device->flags.eject_pending = true; | |
183 | kobject_uevent(&device->dev.kobj, KOBJ_OFFLINE); | |
184 | } else { | |
185 | int error; | |
186 | ||
187 | get_device(&device->dev); | |
188 | error = acpi_scan_hot_remove(device); | |
189 | if (error) | |
190 | goto err_out; | |
f058cdf4 | 191 | } |
1da177e4 | 192 | |
3757b948 | 193 | out: |
f058cdf4 | 194 | mutex_unlock(&acpi_scan_lock); |
c8d72a5e | 195 | return; |
a33ec399 RW |
196 | |
197 | err_out: | |
198 | acpi_evaluate_hotplug_ost(handle, ACPI_NOTIFY_EJECT_REQUEST, ost_code, | |
199 | NULL); | |
200 | goto out; | |
201 | } | |
202 | ||
203 | static void acpi_scan_bus_device_check(acpi_handle handle, u32 ost_source) | |
204 | { | |
205 | struct acpi_device *device = NULL; | |
206 | u32 ost_code = ACPI_OST_SC_NON_SPECIFIC_FAILURE; | |
207 | int error; | |
208 | ||
209 | mutex_lock(&acpi_scan_lock); | |
210 | ||
211 | acpi_bus_get_device(handle, &device); | |
212 | if (device) { | |
213 | dev_warn(&device->dev, "Attempt to re-insert\n"); | |
214 | goto out; | |
215 | } | |
216 | acpi_evaluate_hotplug_ost(handle, ost_source, | |
217 | ACPI_OST_SC_INSERT_IN_PROGRESS, NULL); | |
218 | error = acpi_bus_scan(handle); | |
219 | if (error) { | |
220 | acpi_handle_warn(handle, "Namespace scan failure\n"); | |
221 | goto out; | |
222 | } | |
223 | error = acpi_bus_get_device(handle, &device); | |
224 | if (error) { | |
225 | acpi_handle_warn(handle, "Missing device node object\n"); | |
226 | goto out; | |
227 | } | |
228 | ost_code = ACPI_OST_SC_SUCCESS; | |
229 | if (device->handler && device->handler->hotplug.mode == AHM_CONTAINER) | |
230 | kobject_uevent(&device->dev.kobj, KOBJ_ONLINE); | |
231 | ||
232 | out: | |
233 | acpi_evaluate_hotplug_ost(handle, ost_source, ost_code, NULL); | |
234 | mutex_unlock(&acpi_scan_lock); | |
235 | } | |
236 | ||
237 | static void acpi_scan_bus_check(void *context) | |
238 | { | |
239 | acpi_scan_bus_device_check((acpi_handle)context, | |
240 | ACPI_NOTIFY_BUS_CHECK); | |
241 | } | |
242 | ||
243 | static void acpi_scan_device_check(void *context) | |
244 | { | |
245 | acpi_scan_bus_device_check((acpi_handle)context, | |
246 | ACPI_NOTIFY_DEVICE_CHECK); | |
247 | } | |
248 | ||
249 | static void acpi_hotplug_notify_cb(acpi_handle handle, u32 type, void *not_used) | |
250 | { | |
251 | acpi_osd_exec_callback callback; | |
252 | acpi_status status; | |
253 | ||
254 | switch (type) { | |
255 | case ACPI_NOTIFY_BUS_CHECK: | |
256 | acpi_handle_debug(handle, "ACPI_NOTIFY_BUS_CHECK event\n"); | |
257 | callback = acpi_scan_bus_check; | |
258 | break; | |
259 | case ACPI_NOTIFY_DEVICE_CHECK: | |
260 | acpi_handle_debug(handle, "ACPI_NOTIFY_DEVICE_CHECK event\n"); | |
261 | callback = acpi_scan_device_check; | |
262 | break; | |
263 | case ACPI_NOTIFY_EJECT_REQUEST: | |
264 | acpi_handle_debug(handle, "ACPI_NOTIFY_EJECT_REQUEST event\n"); | |
265 | callback = acpi_bus_device_eject; | |
266 | break; | |
267 | default: | |
268 | /* non-hotplug event; possibly handled by other handler */ | |
269 | return; | |
270 | } | |
271 | status = acpi_os_hotplug_execute(callback, handle); | |
272 | if (ACPI_FAILURE(status)) | |
273 | acpi_evaluate_hotplug_ost(handle, type, | |
274 | ACPI_OST_SC_NON_SPECIFIC_FAILURE, | |
275 | NULL); | |
276 | } | |
277 | ||
278 | /** | |
279 | * acpi_bus_hot_remove_device: hot-remove a device and its children | |
280 | * @context: struct acpi_eject_event pointer (freed in this func) | |
281 | * | |
282 | * Hot-remove a device and its children. This function frees up the | |
283 | * memory space passed by arg context, so that the caller may call | |
284 | * this function asynchronously through acpi_os_hotplug_execute(). | |
285 | */ | |
286 | void acpi_bus_hot_remove_device(void *context) | |
287 | { | |
288 | struct acpi_eject_event *ej_event = context; | |
289 | struct acpi_device *device = ej_event->device; | |
290 | acpi_handle handle = device->handle; | |
291 | int error; | |
292 | ||
293 | mutex_lock(&acpi_scan_lock); | |
294 | ||
295 | error = acpi_scan_hot_remove(device); | |
296 | if (error && handle) | |
297 | acpi_evaluate_hotplug_ost(handle, ej_event->event, | |
298 | ACPI_OST_SC_NON_SPECIFIC_FAILURE, | |
299 | NULL); | |
300 | ||
301 | mutex_unlock(&acpi_scan_lock); | |
302 | kfree(context); | |
1da177e4 | 303 | } |
61622acc | 304 | EXPORT_SYMBOL(acpi_bus_hot_remove_device); |
1da177e4 | 305 | |
836aedb1 RW |
306 | static ssize_t real_power_state_show(struct device *dev, |
307 | struct device_attribute *attr, char *buf) | |
308 | { | |
309 | struct acpi_device *adev = to_acpi_device(dev); | |
310 | int state; | |
311 | int ret; | |
312 | ||
313 | ret = acpi_device_get_power(adev, &state); | |
314 | if (ret) | |
315 | return ret; | |
316 | ||
317 | return sprintf(buf, "%s\n", acpi_power_state_string(state)); | |
318 | } | |
319 | ||
320 | static DEVICE_ATTR(real_power_state, 0444, real_power_state_show, NULL); | |
321 | ||
322 | static ssize_t power_state_show(struct device *dev, | |
323 | struct device_attribute *attr, char *buf) | |
324 | { | |
325 | struct acpi_device *adev = to_acpi_device(dev); | |
326 | ||
327 | return sprintf(buf, "%s\n", acpi_power_state_string(adev->power.state)); | |
328 | } | |
329 | ||
330 | static DEVICE_ATTR(power_state, 0444, power_state_show, NULL); | |
331 | ||
1da177e4 | 332 | static ssize_t |
f883d9db PM |
333 | acpi_eject_store(struct device *d, struct device_attribute *attr, |
334 | const char *buf, size_t count) | |
1da177e4 | 335 | { |
f883d9db | 336 | struct acpi_device *acpi_device = to_acpi_device(d); |
c4753e57 | 337 | struct acpi_eject_event *ej_event; |
a33ec399 RW |
338 | acpi_object_type not_used; |
339 | acpi_status status; | |
340 | u32 ost_source; | |
341 | int ret; | |
1da177e4 | 342 | |
a33ec399 | 343 | if (!count || buf[0] != '1') |
1da177e4 | 344 | return -EINVAL; |
1da177e4 | 345 | |
a33ec399 RW |
346 | if ((!acpi_device->handler || !acpi_device->handler->hotplug.enabled) |
347 | && !acpi_device->driver) | |
348 | return -ENODEV; | |
349 | ||
350 | status = acpi_get_type(acpi_device->handle, ¬_used); | |
351 | if (ACPI_FAILURE(status) || !acpi_device->flags.ejectable) | |
352 | return -ENODEV; | |
353 | ||
354 | mutex_lock(&acpi_scan_lock); | |
c4753e57 | 355 | |
c4753e57 | 356 | if (acpi_device->flags.eject_pending) { |
a33ec399 RW |
357 | /* ACPI eject notification event. */ |
358 | ost_source = ACPI_NOTIFY_EJECT_REQUEST; | |
c4753e57 TK |
359 | acpi_device->flags.eject_pending = 0; |
360 | } else { | |
a33ec399 RW |
361 | /* Eject initiated by user space. */ |
362 | ost_source = ACPI_OST_EC_OSPM_EJECT; | |
c4753e57 | 363 | } |
a33ec399 RW |
364 | ej_event = kmalloc(sizeof(*ej_event), GFP_KERNEL); |
365 | if (!ej_event) { | |
366 | ret = -ENOMEM; | |
367 | goto err_out; | |
368 | } | |
369 | acpi_evaluate_hotplug_ost(acpi_device->handle, ost_source, | |
370 | ACPI_OST_SC_EJECT_IN_PROGRESS, NULL); | |
371 | ej_event->device = acpi_device; | |
372 | ej_event->event = ost_source; | |
373 | get_device(&acpi_device->dev); | |
3757b948 RW |
374 | status = acpi_os_hotplug_execute(acpi_bus_hot_remove_device, ej_event); |
375 | if (ACPI_FAILURE(status)) { | |
376 | put_device(&acpi_device->dev); | |
377 | kfree(ej_event); | |
a33ec399 RW |
378 | ret = status == AE_NO_MEMORY ? -ENOMEM : -EAGAIN; |
379 | goto err_out; | |
3757b948 | 380 | } |
a33ec399 RW |
381 | ret = count; |
382 | ||
383 | out: | |
384 | mutex_unlock(&acpi_scan_lock); | |
1da177e4 | 385 | return ret; |
a33ec399 RW |
386 | |
387 | err_out: | |
388 | acpi_evaluate_hotplug_ost(acpi_device->handle, ost_source, | |
389 | ACPI_OST_SC_NON_SPECIFIC_FAILURE, NULL); | |
390 | goto out; | |
1da177e4 LT |
391 | } |
392 | ||
f883d9db | 393 | static DEVICE_ATTR(eject, 0200, NULL, acpi_eject_store); |
1da177e4 | 394 | |
e49bd2dd ZR |
395 | static ssize_t |
396 | acpi_device_hid_show(struct device *dev, struct device_attribute *attr, char *buf) { | |
397 | struct acpi_device *acpi_dev = to_acpi_device(dev); | |
1da177e4 | 398 | |
ea8d82fd | 399 | return sprintf(buf, "%s\n", acpi_device_hid(acpi_dev)); |
1da177e4 | 400 | } |
e49bd2dd | 401 | static DEVICE_ATTR(hid, 0444, acpi_device_hid_show, NULL); |
1da177e4 | 402 | |
923d4a45 LZ |
403 | static ssize_t acpi_device_uid_show(struct device *dev, |
404 | struct device_attribute *attr, char *buf) | |
405 | { | |
406 | struct acpi_device *acpi_dev = to_acpi_device(dev); | |
407 | ||
408 | return sprintf(buf, "%s\n", acpi_dev->pnp.unique_id); | |
409 | } | |
410 | static DEVICE_ATTR(uid, 0444, acpi_device_uid_show, NULL); | |
411 | ||
412 | static ssize_t acpi_device_adr_show(struct device *dev, | |
413 | struct device_attribute *attr, char *buf) | |
414 | { | |
415 | struct acpi_device *acpi_dev = to_acpi_device(dev); | |
416 | ||
417 | return sprintf(buf, "0x%08x\n", | |
418 | (unsigned int)(acpi_dev->pnp.bus_address)); | |
419 | } | |
420 | static DEVICE_ATTR(adr, 0444, acpi_device_adr_show, NULL); | |
421 | ||
e49bd2dd ZR |
422 | static ssize_t |
423 | acpi_device_path_show(struct device *dev, struct device_attribute *attr, char *buf) { | |
424 | struct acpi_device *acpi_dev = to_acpi_device(dev); | |
425 | struct acpi_buffer path = {ACPI_ALLOCATE_BUFFER, NULL}; | |
426 | int result; | |
1da177e4 | 427 | |
e49bd2dd | 428 | result = acpi_get_name(acpi_dev->handle, ACPI_FULL_PATHNAME, &path); |
0c526d96 | 429 | if (result) |
e49bd2dd | 430 | goto end; |
1da177e4 | 431 | |
e49bd2dd ZR |
432 | result = sprintf(buf, "%s\n", (char*)path.pointer); |
433 | kfree(path.pointer); | |
0c526d96 | 434 | end: |
e49bd2dd | 435 | return result; |
1da177e4 | 436 | } |
e49bd2dd | 437 | static DEVICE_ATTR(path, 0444, acpi_device_path_show, NULL); |
1da177e4 | 438 | |
d1efe3c3 LO |
439 | /* sysfs file that shows description text from the ACPI _STR method */ |
440 | static ssize_t description_show(struct device *dev, | |
441 | struct device_attribute *attr, | |
442 | char *buf) { | |
443 | struct acpi_device *acpi_dev = to_acpi_device(dev); | |
444 | int result; | |
445 | ||
446 | if (acpi_dev->pnp.str_obj == NULL) | |
447 | return 0; | |
448 | ||
449 | /* | |
450 | * The _STR object contains a Unicode identifier for a device. | |
451 | * We need to convert to utf-8 so it can be displayed. | |
452 | */ | |
453 | result = utf16s_to_utf8s( | |
454 | (wchar_t *)acpi_dev->pnp.str_obj->buffer.pointer, | |
455 | acpi_dev->pnp.str_obj->buffer.length, | |
456 | UTF16_LITTLE_ENDIAN, buf, | |
457 | PAGE_SIZE); | |
458 | ||
459 | buf[result++] = '\n'; | |
460 | ||
461 | return result; | |
462 | } | |
463 | static DEVICE_ATTR(description, 0444, description_show, NULL); | |
464 | ||
bb74ac23 YI |
465 | static ssize_t |
466 | acpi_device_sun_show(struct device *dev, struct device_attribute *attr, | |
467 | char *buf) { | |
468 | struct acpi_device *acpi_dev = to_acpi_device(dev); | |
469 | ||
470 | return sprintf(buf, "%lu\n", acpi_dev->pnp.sun); | |
471 | } | |
472 | static DEVICE_ATTR(sun, 0444, acpi_device_sun_show, NULL); | |
473 | ||
e49bd2dd | 474 | static int acpi_device_setup_files(struct acpi_device *dev) |
1da177e4 | 475 | { |
d1efe3c3 | 476 | struct acpi_buffer buffer = {ACPI_ALLOCATE_BUFFER, NULL}; |
f883d9db PM |
477 | acpi_status status; |
478 | acpi_handle temp; | |
bb74ac23 | 479 | unsigned long long sun; |
e49bd2dd | 480 | int result = 0; |
1da177e4 LT |
481 | |
482 | /* | |
e49bd2dd | 483 | * Devices gotten from FADT don't have a "path" attribute |
1da177e4 | 484 | */ |
0c526d96 | 485 | if (dev->handle) { |
e49bd2dd | 486 | result = device_create_file(&dev->dev, &dev_attr_path); |
0c526d96 | 487 | if (result) |
e49bd2dd | 488 | goto end; |
1da177e4 LT |
489 | } |
490 | ||
2b2ae7c7 TR |
491 | if (!list_empty(&dev->pnp.ids)) { |
492 | result = device_create_file(&dev->dev, &dev_attr_hid); | |
493 | if (result) | |
494 | goto end; | |
1da177e4 | 495 | |
2b2ae7c7 TR |
496 | result = device_create_file(&dev->dev, &dev_attr_modalias); |
497 | if (result) | |
498 | goto end; | |
499 | } | |
29b71a1c | 500 | |
d1efe3c3 LO |
501 | /* |
502 | * If device has _STR, 'description' file is created | |
503 | */ | |
504 | status = acpi_get_handle(dev->handle, "_STR", &temp); | |
505 | if (ACPI_SUCCESS(status)) { | |
506 | status = acpi_evaluate_object(dev->handle, "_STR", | |
507 | NULL, &buffer); | |
508 | if (ACPI_FAILURE(status)) | |
509 | buffer.pointer = NULL; | |
510 | dev->pnp.str_obj = buffer.pointer; | |
511 | result = device_create_file(&dev->dev, &dev_attr_description); | |
512 | if (result) | |
513 | goto end; | |
514 | } | |
515 | ||
923d4a45 LZ |
516 | if (dev->flags.bus_address) |
517 | result = device_create_file(&dev->dev, &dev_attr_adr); | |
518 | if (dev->pnp.unique_id) | |
519 | result = device_create_file(&dev->dev, &dev_attr_uid); | |
520 | ||
bb74ac23 YI |
521 | status = acpi_evaluate_integer(dev->handle, "_SUN", NULL, &sun); |
522 | if (ACPI_SUCCESS(status)) { | |
523 | dev->pnp.sun = (unsigned long)sun; | |
524 | result = device_create_file(&dev->dev, &dev_attr_sun); | |
525 | if (result) | |
526 | goto end; | |
527 | } else { | |
528 | dev->pnp.sun = (unsigned long)-1; | |
529 | } | |
530 | ||
e49bd2dd ZR |
531 | /* |
532 | * If device has _EJ0, 'eject' file is created that is used to trigger | |
533 | * hot-removal function from userland. | |
534 | */ | |
f883d9db | 535 | status = acpi_get_handle(dev->handle, "_EJ0", &temp); |
836aedb1 | 536 | if (ACPI_SUCCESS(status)) { |
e49bd2dd | 537 | result = device_create_file(&dev->dev, &dev_attr_eject); |
836aedb1 RW |
538 | if (result) |
539 | return result; | |
540 | } | |
541 | ||
542 | if (dev->flags.power_manageable) { | |
543 | result = device_create_file(&dev->dev, &dev_attr_power_state); | |
544 | if (result) | |
545 | return result; | |
546 | ||
547 | if (dev->power.flags.power_resources) | |
548 | result = device_create_file(&dev->dev, | |
549 | &dev_attr_real_power_state); | |
550 | } | |
551 | ||
0c526d96 | 552 | end: |
e49bd2dd | 553 | return result; |
1da177e4 LT |
554 | } |
555 | ||
f883d9db | 556 | static void acpi_device_remove_files(struct acpi_device *dev) |
1da177e4 | 557 | { |
f883d9db PM |
558 | acpi_status status; |
559 | acpi_handle temp; | |
1da177e4 | 560 | |
836aedb1 RW |
561 | if (dev->flags.power_manageable) { |
562 | device_remove_file(&dev->dev, &dev_attr_power_state); | |
563 | if (dev->power.flags.power_resources) | |
564 | device_remove_file(&dev->dev, | |
565 | &dev_attr_real_power_state); | |
566 | } | |
567 | ||
f883d9db | 568 | /* |
d1efe3c3 LO |
569 | * If device has _STR, remove 'description' file |
570 | */ | |
571 | status = acpi_get_handle(dev->handle, "_STR", &temp); | |
572 | if (ACPI_SUCCESS(status)) { | |
573 | kfree(dev->pnp.str_obj); | |
574 | device_remove_file(&dev->dev, &dev_attr_description); | |
575 | } | |
576 | /* | |
577 | * If device has _EJ0, remove 'eject' file. | |
f883d9db PM |
578 | */ |
579 | status = acpi_get_handle(dev->handle, "_EJ0", &temp); | |
580 | if (ACPI_SUCCESS(status)) | |
581 | device_remove_file(&dev->dev, &dev_attr_eject); | |
1da177e4 | 582 | |
bb74ac23 YI |
583 | status = acpi_get_handle(dev->handle, "_SUN", &temp); |
584 | if (ACPI_SUCCESS(status)) | |
585 | device_remove_file(&dev->dev, &dev_attr_sun); | |
586 | ||
923d4a45 LZ |
587 | if (dev->pnp.unique_id) |
588 | device_remove_file(&dev->dev, &dev_attr_uid); | |
589 | if (dev->flags.bus_address) | |
590 | device_remove_file(&dev->dev, &dev_attr_adr); | |
1131b938 BH |
591 | device_remove_file(&dev->dev, &dev_attr_modalias); |
592 | device_remove_file(&dev->dev, &dev_attr_hid); | |
0c526d96 | 593 | if (dev->handle) |
e49bd2dd | 594 | device_remove_file(&dev->dev, &dev_attr_path); |
1da177e4 | 595 | } |
1da177e4 | 596 | /* -------------------------------------------------------------------------- |
9e89dde2 | 597 | ACPI Bus operations |
1da177e4 | 598 | -------------------------------------------------------------------------- */ |
29b71a1c | 599 | |
cf761af9 MW |
600 | static const struct acpi_device_id *__acpi_match_device( |
601 | struct acpi_device *device, const struct acpi_device_id *ids) | |
29b71a1c TR |
602 | { |
603 | const struct acpi_device_id *id; | |
7f47fa6c | 604 | struct acpi_hardware_id *hwid; |
29b71a1c | 605 | |
39a0ad87 ZY |
606 | /* |
607 | * If the device is not present, it is unnecessary to load device | |
608 | * driver for it. | |
609 | */ | |
610 | if (!device->status.present) | |
cf761af9 | 611 | return NULL; |
39a0ad87 | 612 | |
7f47fa6c BH |
613 | for (id = ids; id->id[0]; id++) |
614 | list_for_each_entry(hwid, &device->pnp.ids, list) | |
615 | if (!strcmp((char *) id->id, hwid->id)) | |
cf761af9 MW |
616 | return id; |
617 | ||
618 | return NULL; | |
619 | } | |
620 | ||
621 | /** | |
622 | * acpi_match_device - Match a struct device against a given list of ACPI IDs | |
623 | * @ids: Array of struct acpi_device_id object to match against. | |
624 | * @dev: The device structure to match. | |
625 | * | |
626 | * Check if @dev has a valid ACPI handle and if there is a struct acpi_device | |
627 | * object for that handle and use that object to match against a given list of | |
628 | * device IDs. | |
629 | * | |
630 | * Return a pointer to the first matching ID on success or %NULL on failure. | |
631 | */ | |
632 | const struct acpi_device_id *acpi_match_device(const struct acpi_device_id *ids, | |
633 | const struct device *dev) | |
634 | { | |
635 | struct acpi_device *adev; | |
0613e1f7 | 636 | acpi_handle handle = ACPI_HANDLE(dev); |
cf761af9 | 637 | |
0613e1f7 | 638 | if (!ids || !handle || acpi_bus_get_device(handle, &adev)) |
cf761af9 MW |
639 | return NULL; |
640 | ||
641 | return __acpi_match_device(adev, ids); | |
642 | } | |
643 | EXPORT_SYMBOL_GPL(acpi_match_device); | |
29b71a1c | 644 | |
cf761af9 MW |
645 | int acpi_match_device_ids(struct acpi_device *device, |
646 | const struct acpi_device_id *ids) | |
647 | { | |
648 | return __acpi_match_device(device, ids) ? 0 : -ENOENT; | |
29b71a1c TR |
649 | } |
650 | EXPORT_SYMBOL(acpi_match_device_ids); | |
651 | ||
82c7d5ef | 652 | void acpi_free_ids(struct acpi_device *device) |
7f47fa6c BH |
653 | { |
654 | struct acpi_hardware_id *id, *tmp; | |
655 | ||
656 | list_for_each_entry_safe(id, tmp, &device->pnp.ids, list) { | |
657 | kfree(id->id); | |
658 | kfree(id); | |
659 | } | |
d43e167d | 660 | kfree(device->pnp.unique_id); |
7f47fa6c BH |
661 | } |
662 | ||
0b224527 RW |
663 | static void acpi_free_power_resources_lists(struct acpi_device *device) |
664 | { | |
665 | int i; | |
666 | ||
993cbe59 RW |
667 | if (device->wakeup.flags.valid) |
668 | acpi_power_resources_list_free(&device->wakeup.resources); | |
669 | ||
0b224527 RW |
670 | if (!device->flags.power_manageable) |
671 | return; | |
672 | ||
673 | for (i = ACPI_STATE_D0; i <= ACPI_STATE_D3_HOT; i++) { | |
674 | struct acpi_device_power_state *ps = &device->power.states[i]; | |
675 | acpi_power_resources_list_free(&ps->resources); | |
676 | } | |
7f47fa6c BH |
677 | } |
678 | ||
1890a97a | 679 | static void acpi_device_release(struct device *dev) |
1da177e4 | 680 | { |
1890a97a | 681 | struct acpi_device *acpi_dev = to_acpi_device(dev); |
1da177e4 | 682 | |
7f47fa6c | 683 | acpi_free_ids(acpi_dev); |
0b224527 | 684 | acpi_free_power_resources_lists(acpi_dev); |
1890a97a | 685 | kfree(acpi_dev); |
1da177e4 LT |
686 | } |
687 | ||
5d9464a4 | 688 | static int acpi_bus_match(struct device *dev, struct device_driver *drv) |
9e89dde2 | 689 | { |
5d9464a4 PM |
690 | struct acpi_device *acpi_dev = to_acpi_device(dev); |
691 | struct acpi_driver *acpi_drv = to_acpi_driver(drv); | |
1da177e4 | 692 | |
209d3b17 | 693 | return acpi_dev->flags.match_driver |
805d410f | 694 | && !acpi_match_device_ids(acpi_dev, acpi_drv->ids); |
5d9464a4 | 695 | } |
1da177e4 | 696 | |
7eff2e7a | 697 | static int acpi_device_uevent(struct device *dev, struct kobj_uevent_env *env) |
1da177e4 | 698 | { |
5d9464a4 | 699 | struct acpi_device *acpi_dev = to_acpi_device(dev); |
7eff2e7a | 700 | int len; |
5d9464a4 | 701 | |
2b2ae7c7 TR |
702 | if (list_empty(&acpi_dev->pnp.ids)) |
703 | return 0; | |
704 | ||
7eff2e7a KS |
705 | if (add_uevent_var(env, "MODALIAS=")) |
706 | return -ENOMEM; | |
707 | len = create_modalias(acpi_dev, &env->buf[env->buflen - 1], | |
708 | sizeof(env->buf) - env->buflen); | |
709 | if (len >= (sizeof(env->buf) - env->buflen)) | |
710 | return -ENOMEM; | |
711 | env->buflen += len; | |
9e89dde2 | 712 | return 0; |
1da177e4 LT |
713 | } |
714 | ||
46ec8598 BH |
715 | static void acpi_device_notify(acpi_handle handle, u32 event, void *data) |
716 | { | |
717 | struct acpi_device *device = data; | |
718 | ||
719 | device->driver->ops.notify(device, event); | |
720 | } | |
721 | ||
722 | static acpi_status acpi_device_notify_fixed(void *data) | |
723 | { | |
724 | struct acpi_device *device = data; | |
725 | ||
53de5356 BH |
726 | /* Fixed hardware devices have no handles */ |
727 | acpi_device_notify(NULL, ACPI_FIXED_HARDWARE_EVENT, device); | |
46ec8598 BH |
728 | return AE_OK; |
729 | } | |
730 | ||
731 | static int acpi_device_install_notify_handler(struct acpi_device *device) | |
732 | { | |
733 | acpi_status status; | |
46ec8598 | 734 | |
ccba2a36 | 735 | if (device->device_type == ACPI_BUS_TYPE_POWER_BUTTON) |
46ec8598 BH |
736 | status = |
737 | acpi_install_fixed_event_handler(ACPI_EVENT_POWER_BUTTON, | |
738 | acpi_device_notify_fixed, | |
739 | device); | |
ccba2a36 | 740 | else if (device->device_type == ACPI_BUS_TYPE_SLEEP_BUTTON) |
46ec8598 BH |
741 | status = |
742 | acpi_install_fixed_event_handler(ACPI_EVENT_SLEEP_BUTTON, | |
743 | acpi_device_notify_fixed, | |
744 | device); | |
745 | else | |
746 | status = acpi_install_notify_handler(device->handle, | |
747 | ACPI_DEVICE_NOTIFY, | |
748 | acpi_device_notify, | |
749 | device); | |
750 | ||
751 | if (ACPI_FAILURE(status)) | |
752 | return -EINVAL; | |
753 | return 0; | |
754 | } | |
755 | ||
756 | static void acpi_device_remove_notify_handler(struct acpi_device *device) | |
757 | { | |
ccba2a36 | 758 | if (device->device_type == ACPI_BUS_TYPE_POWER_BUTTON) |
46ec8598 BH |
759 | acpi_remove_fixed_event_handler(ACPI_EVENT_POWER_BUTTON, |
760 | acpi_device_notify_fixed); | |
ccba2a36 | 761 | else if (device->device_type == ACPI_BUS_TYPE_SLEEP_BUTTON) |
46ec8598 BH |
762 | acpi_remove_fixed_event_handler(ACPI_EVENT_SLEEP_BUTTON, |
763 | acpi_device_notify_fixed); | |
764 | else | |
765 | acpi_remove_notify_handler(device->handle, ACPI_DEVICE_NOTIFY, | |
766 | acpi_device_notify); | |
767 | } | |
768 | ||
5d9464a4 | 769 | static int acpi_bus_driver_init(struct acpi_device *, struct acpi_driver *); |
5d9464a4 | 770 | static int acpi_device_probe(struct device * dev) |
1da177e4 | 771 | { |
5d9464a4 PM |
772 | struct acpi_device *acpi_dev = to_acpi_device(dev); |
773 | struct acpi_driver *acpi_drv = to_acpi_driver(dev->driver); | |
774 | int ret; | |
775 | ||
776 | ret = acpi_bus_driver_init(acpi_dev, acpi_drv); | |
777 | if (!ret) { | |
46ec8598 BH |
778 | if (acpi_drv->ops.notify) { |
779 | ret = acpi_device_install_notify_handler(acpi_dev); | |
780 | if (ret) { | |
46ec8598 | 781 | if (acpi_drv->ops.remove) |
51fac838 | 782 | acpi_drv->ops.remove(acpi_dev); |
5f27ee8e TK |
783 | acpi_dev->driver = NULL; |
784 | acpi_dev->driver_data = NULL; | |
46ec8598 BH |
785 | return ret; |
786 | } | |
787 | } | |
788 | ||
5d9464a4 PM |
789 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
790 | "Found driver [%s] for device [%s]\n", | |
791 | acpi_drv->name, acpi_dev->pnp.bus_id)); | |
792 | get_device(dev); | |
793 | } | |
794 | return ret; | |
795 | } | |
1da177e4 | 796 | |
5d9464a4 PM |
797 | static int acpi_device_remove(struct device * dev) |
798 | { | |
799 | struct acpi_device *acpi_dev = to_acpi_device(dev); | |
800 | struct acpi_driver *acpi_drv = acpi_dev->driver; | |
801 | ||
802 | if (acpi_drv) { | |
46ec8598 BH |
803 | if (acpi_drv->ops.notify) |
804 | acpi_device_remove_notify_handler(acpi_dev); | |
5d9464a4 | 805 | if (acpi_drv->ops.remove) |
51fac838 | 806 | acpi_drv->ops.remove(acpi_dev); |
1da177e4 | 807 | } |
5d9464a4 | 808 | acpi_dev->driver = NULL; |
db89b4f0 | 809 | acpi_dev->driver_data = NULL; |
1da177e4 | 810 | |
5d9464a4 | 811 | put_device(dev); |
9e89dde2 ZR |
812 | return 0; |
813 | } | |
1da177e4 | 814 | |
55955aad | 815 | struct bus_type acpi_bus_type = { |
9e89dde2 | 816 | .name = "acpi", |
5d9464a4 PM |
817 | .match = acpi_bus_match, |
818 | .probe = acpi_device_probe, | |
819 | .remove = acpi_device_remove, | |
820 | .uevent = acpi_device_uevent, | |
9e89dde2 ZR |
821 | }; |
822 | ||
cf860be6 RW |
823 | int acpi_device_add(struct acpi_device *device, |
824 | void (*release)(struct device *)) | |
1da177e4 | 825 | { |
4be44fcd | 826 | int result; |
e49bd2dd ZR |
827 | struct acpi_device_bus_id *acpi_device_bus_id, *new_bus_id; |
828 | int found = 0; | |
66b7ed40 | 829 | |
d43e167d RW |
830 | if (device->handle) { |
831 | acpi_status status; | |
832 | ||
833 | status = acpi_attach_data(device->handle, acpi_bus_data_handler, | |
834 | device); | |
835 | if (ACPI_FAILURE(status)) { | |
836 | acpi_handle_err(device->handle, | |
837 | "Unable to attach device data\n"); | |
838 | return -ENODEV; | |
839 | } | |
840 | } | |
841 | ||
9e89dde2 ZR |
842 | /* |
843 | * Linkage | |
844 | * ------- | |
845 | * Link this device to its parent and siblings. | |
846 | */ | |
847 | INIT_LIST_HEAD(&device->children); | |
848 | INIT_LIST_HEAD(&device->node); | |
9e89dde2 | 849 | INIT_LIST_HEAD(&device->wakeup_list); |
1033f904 LT |
850 | INIT_LIST_HEAD(&device->physical_node_list); |
851 | mutex_init(&device->physical_node_lock); | |
bc9b6407 | 852 | INIT_LIST_HEAD(&device->power_dependent); |
1da177e4 | 853 | |
e49bd2dd ZR |
854 | new_bus_id = kzalloc(sizeof(struct acpi_device_bus_id), GFP_KERNEL); |
855 | if (!new_bus_id) { | |
d43e167d RW |
856 | pr_err(PREFIX "Memory allocation error\n"); |
857 | result = -ENOMEM; | |
858 | goto err_detach; | |
1da177e4 | 859 | } |
e49bd2dd | 860 | |
9090589d | 861 | mutex_lock(&acpi_device_lock); |
e49bd2dd ZR |
862 | /* |
863 | * Find suitable bus_id and instance number in acpi_bus_id_list | |
864 | * If failed, create one and link it into acpi_bus_id_list | |
865 | */ | |
866 | list_for_each_entry(acpi_device_bus_id, &acpi_bus_id_list, node) { | |
1131b938 BH |
867 | if (!strcmp(acpi_device_bus_id->bus_id, |
868 | acpi_device_hid(device))) { | |
869 | acpi_device_bus_id->instance_no++; | |
e49bd2dd ZR |
870 | found = 1; |
871 | kfree(new_bus_id); | |
872 | break; | |
873 | } | |
1da177e4 | 874 | } |
0c526d96 | 875 | if (!found) { |
e49bd2dd | 876 | acpi_device_bus_id = new_bus_id; |
1131b938 | 877 | strcpy(acpi_device_bus_id->bus_id, acpi_device_hid(device)); |
e49bd2dd ZR |
878 | acpi_device_bus_id->instance_no = 0; |
879 | list_add_tail(&acpi_device_bus_id->node, &acpi_bus_id_list); | |
1da177e4 | 880 | } |
0794469d | 881 | dev_set_name(&device->dev, "%s:%02x", acpi_device_bus_id->bus_id, acpi_device_bus_id->instance_no); |
1da177e4 | 882 | |
33b57150 | 883 | if (device->parent) |
9e89dde2 | 884 | list_add_tail(&device->node, &device->parent->children); |
33b57150 | 885 | |
9e89dde2 ZR |
886 | if (device->wakeup.flags.valid) |
887 | list_add_tail(&device->wakeup_list, &acpi_wakeup_device_list); | |
9090589d | 888 | mutex_unlock(&acpi_device_lock); |
1da177e4 | 889 | |
1890a97a | 890 | if (device->parent) |
66b7ed40 | 891 | device->dev.parent = &device->parent->dev; |
1890a97a | 892 | device->dev.bus = &acpi_bus_type; |
82c7d5ef | 893 | device->dev.release = release; |
cf860be6 | 894 | result = device_add(&device->dev); |
0c526d96 | 895 | if (result) { |
8b12b922 | 896 | dev_err(&device->dev, "Error registering device\n"); |
d43e167d | 897 | goto err; |
1da177e4 | 898 | } |
1da177e4 | 899 | |
e49bd2dd | 900 | result = acpi_device_setup_files(device); |
0c526d96 | 901 | if (result) |
0794469d KS |
902 | printk(KERN_ERR PREFIX "Error creating sysfs interface for device %s\n", |
903 | dev_name(&device->dev)); | |
1da177e4 | 904 | |
96333578 | 905 | device->removal_type = ACPI_BUS_REMOVAL_NORMAL; |
1da177e4 | 906 | return 0; |
d43e167d RW |
907 | |
908 | err: | |
9090589d | 909 | mutex_lock(&acpi_device_lock); |
33b57150 | 910 | if (device->parent) |
e49bd2dd | 911 | list_del(&device->node); |
e49bd2dd | 912 | list_del(&device->wakeup_list); |
9090589d | 913 | mutex_unlock(&acpi_device_lock); |
d43e167d RW |
914 | |
915 | err_detach: | |
916 | acpi_detach_data(device->handle, acpi_bus_data_handler); | |
e49bd2dd | 917 | return result; |
1da177e4 LT |
918 | } |
919 | ||
b17b537a | 920 | static void acpi_device_unregister(struct acpi_device *device) |
9e89dde2 | 921 | { |
9090589d | 922 | mutex_lock(&acpi_device_lock); |
33b57150 | 923 | if (device->parent) |
9e89dde2 | 924 | list_del(&device->node); |
1da177e4 | 925 | |
9e89dde2 | 926 | list_del(&device->wakeup_list); |
9090589d | 927 | mutex_unlock(&acpi_device_lock); |
1da177e4 | 928 | |
9e89dde2 | 929 | acpi_detach_data(device->handle, acpi_bus_data_handler); |
1890a97a | 930 | |
bc9b6407 | 931 | acpi_power_add_remove_device(device, false); |
f883d9db | 932 | acpi_device_remove_files(device); |
b1c0f99b RW |
933 | if (device->remove) |
934 | device->remove(device); | |
935 | ||
cf860be6 | 936 | device_del(&device->dev); |
bc9b6407 | 937 | /* |
0aa120a0 RW |
938 | * Transition the device to D3cold to drop the reference counts of all |
939 | * power resources the device depends on and turn off the ones that have | |
940 | * no more references. | |
bc9b6407 | 941 | */ |
0aa120a0 | 942 | acpi_device_set_power(device, ACPI_STATE_D3_COLD); |
3757b948 | 943 | device->handle = NULL; |
cf860be6 | 944 | put_device(&device->dev); |
1da177e4 LT |
945 | } |
946 | ||
9e89dde2 ZR |
947 | /* -------------------------------------------------------------------------- |
948 | Driver Management | |
949 | -------------------------------------------------------------------------- */ | |
1da177e4 | 950 | /** |
d758a8fa RD |
951 | * acpi_bus_driver_init - add a device to a driver |
952 | * @device: the device to add and initialize | |
953 | * @driver: driver for the device | |
954 | * | |
0c526d96 | 955 | * Used to initialize a device via its device driver. Called whenever a |
1890a97a | 956 | * driver is bound to a device. Invokes the driver's add() ops. |
1da177e4 LT |
957 | */ |
958 | static int | |
4be44fcd | 959 | acpi_bus_driver_init(struct acpi_device *device, struct acpi_driver *driver) |
1da177e4 | 960 | { |
4be44fcd | 961 | int result = 0; |
1da177e4 | 962 | |
1da177e4 | 963 | if (!device || !driver) |
d550d98d | 964 | return -EINVAL; |
1da177e4 LT |
965 | |
966 | if (!driver->ops.add) | |
d550d98d | 967 | return -ENOSYS; |
1da177e4 LT |
968 | |
969 | result = driver->ops.add(device); | |
970 | if (result) { | |
971 | device->driver = NULL; | |
db89b4f0 | 972 | device->driver_data = NULL; |
d550d98d | 973 | return result; |
1da177e4 LT |
974 | } |
975 | ||
976 | device->driver = driver; | |
977 | ||
978 | /* | |
979 | * TBD - Configuration Management: Assign resources to device based | |
980 | * upon possible configuration and currently allocated resources. | |
981 | */ | |
982 | ||
4be44fcd LB |
983 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
984 | "Driver successfully bound to device\n")); | |
d550d98d | 985 | return 0; |
3fb02738 RS |
986 | } |
987 | ||
9e89dde2 ZR |
988 | /** |
989 | * acpi_bus_register_driver - register a driver with the ACPI bus | |
990 | * @driver: driver being registered | |
991 | * | |
992 | * Registers a driver with the ACPI bus. Searches the namespace for all | |
993 | * devices that match the driver's criteria and binds. Returns zero for | |
994 | * success or a negative error status for failure. | |
995 | */ | |
996 | int acpi_bus_register_driver(struct acpi_driver *driver) | |
1da177e4 | 997 | { |
1890a97a | 998 | int ret; |
1da177e4 | 999 | |
9e89dde2 ZR |
1000 | if (acpi_disabled) |
1001 | return -ENODEV; | |
1890a97a PM |
1002 | driver->drv.name = driver->name; |
1003 | driver->drv.bus = &acpi_bus_type; | |
1004 | driver->drv.owner = driver->owner; | |
1da177e4 | 1005 | |
1890a97a PM |
1006 | ret = driver_register(&driver->drv); |
1007 | return ret; | |
9e89dde2 | 1008 | } |
1da177e4 | 1009 | |
9e89dde2 ZR |
1010 | EXPORT_SYMBOL(acpi_bus_register_driver); |
1011 | ||
1012 | /** | |
1013 | * acpi_bus_unregister_driver - unregisters a driver with the APIC bus | |
1014 | * @driver: driver to unregister | |
1015 | * | |
1016 | * Unregisters a driver with the ACPI bus. Searches the namespace for all | |
1017 | * devices that match the driver's criteria and unbinds. | |
1018 | */ | |
1019 | void acpi_bus_unregister_driver(struct acpi_driver *driver) | |
1020 | { | |
1890a97a | 1021 | driver_unregister(&driver->drv); |
9e89dde2 ZR |
1022 | } |
1023 | ||
1024 | EXPORT_SYMBOL(acpi_bus_unregister_driver); | |
1025 | ||
9e89dde2 ZR |
1026 | /* -------------------------------------------------------------------------- |
1027 | Device Enumeration | |
1028 | -------------------------------------------------------------------------- */ | |
5c478f49 BH |
1029 | static struct acpi_device *acpi_bus_get_parent(acpi_handle handle) |
1030 | { | |
456de893 | 1031 | struct acpi_device *device = NULL; |
5c478f49 | 1032 | acpi_status status; |
5c478f49 BH |
1033 | |
1034 | /* | |
1035 | * Fixed hardware devices do not appear in the namespace and do not | |
1036 | * have handles, but we fabricate acpi_devices for them, so we have | |
1037 | * to deal with them specially. | |
1038 | */ | |
456de893 | 1039 | if (!handle) |
5c478f49 BH |
1040 | return acpi_root; |
1041 | ||
1042 | do { | |
1043 | status = acpi_get_parent(handle, &handle); | |
5c478f49 | 1044 | if (ACPI_FAILURE(status)) |
456de893 RW |
1045 | return status == AE_NULL_ENTRY ? NULL : acpi_root; |
1046 | } while (acpi_bus_get_device(handle, &device)); | |
1047 | return device; | |
5c478f49 BH |
1048 | } |
1049 | ||
9e89dde2 ZR |
1050 | acpi_status |
1051 | acpi_bus_get_ejd(acpi_handle handle, acpi_handle *ejd) | |
1052 | { | |
1053 | acpi_status status; | |
1054 | acpi_handle tmp; | |
1055 | struct acpi_buffer buffer = {ACPI_ALLOCATE_BUFFER, NULL}; | |
1056 | union acpi_object *obj; | |
1057 | ||
1058 | status = acpi_get_handle(handle, "_EJD", &tmp); | |
1059 | if (ACPI_FAILURE(status)) | |
1060 | return status; | |
1061 | ||
1062 | status = acpi_evaluate_object(handle, "_EJD", NULL, &buffer); | |
1063 | if (ACPI_SUCCESS(status)) { | |
1064 | obj = buffer.pointer; | |
3b5fee59 HM |
1065 | status = acpi_get_handle(ACPI_ROOT_OBJECT, obj->string.pointer, |
1066 | ejd); | |
9e89dde2 ZR |
1067 | kfree(buffer.pointer); |
1068 | } | |
1069 | return status; | |
1070 | } | |
1071 | EXPORT_SYMBOL_GPL(acpi_bus_get_ejd); | |
1072 | ||
8e4319c4 | 1073 | void acpi_bus_data_handler(acpi_handle handle, void *context) |
9e89dde2 ZR |
1074 | { |
1075 | ||
1076 | /* TBD */ | |
1077 | ||
1078 | return; | |
1079 | } | |
1080 | ||
e88c9c60 RW |
1081 | static int acpi_bus_extract_wakeup_device_power_package(acpi_handle handle, |
1082 | struct acpi_device_wakeup *wakeup) | |
9e89dde2 | 1083 | { |
b581a7f9 RW |
1084 | struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; |
1085 | union acpi_object *package = NULL; | |
9e89dde2 | 1086 | union acpi_object *element = NULL; |
b581a7f9 | 1087 | acpi_status status; |
e88c9c60 | 1088 | int err = -ENODATA; |
9e89dde2 | 1089 | |
b581a7f9 | 1090 | if (!wakeup) |
e88c9c60 | 1091 | return -EINVAL; |
9e89dde2 | 1092 | |
993cbe59 | 1093 | INIT_LIST_HEAD(&wakeup->resources); |
9e89dde2 | 1094 | |
b581a7f9 RW |
1095 | /* _PRW */ |
1096 | status = acpi_evaluate_object(handle, "_PRW", NULL, &buffer); | |
1097 | if (ACPI_FAILURE(status)) { | |
1098 | ACPI_EXCEPTION((AE_INFO, status, "Evaluating _PRW")); | |
e88c9c60 | 1099 | return err; |
b581a7f9 RW |
1100 | } |
1101 | ||
1102 | package = (union acpi_object *)buffer.pointer; | |
1103 | ||
e88c9c60 | 1104 | if (!package || package->package.count < 2) |
b581a7f9 | 1105 | goto out; |
b581a7f9 | 1106 | |
9e89dde2 | 1107 | element = &(package->package.elements[0]); |
e88c9c60 | 1108 | if (!element) |
b581a7f9 | 1109 | goto out; |
e88c9c60 | 1110 | |
9e89dde2 ZR |
1111 | if (element->type == ACPI_TYPE_PACKAGE) { |
1112 | if ((element->package.count < 2) || | |
1113 | (element->package.elements[0].type != | |
1114 | ACPI_TYPE_LOCAL_REFERENCE) | |
e88c9c60 | 1115 | || (element->package.elements[1].type != ACPI_TYPE_INTEGER)) |
b581a7f9 | 1116 | goto out; |
e88c9c60 | 1117 | |
b581a7f9 | 1118 | wakeup->gpe_device = |
9e89dde2 | 1119 | element->package.elements[0].reference.handle; |
b581a7f9 | 1120 | wakeup->gpe_number = |
9e89dde2 ZR |
1121 | (u32) element->package.elements[1].integer.value; |
1122 | } else if (element->type == ACPI_TYPE_INTEGER) { | |
b581a7f9 RW |
1123 | wakeup->gpe_device = NULL; |
1124 | wakeup->gpe_number = element->integer.value; | |
1125 | } else { | |
b581a7f9 RW |
1126 | goto out; |
1127 | } | |
9e89dde2 ZR |
1128 | |
1129 | element = &(package->package.elements[1]); | |
e88c9c60 | 1130 | if (element->type != ACPI_TYPE_INTEGER) |
b581a7f9 | 1131 | goto out; |
e88c9c60 | 1132 | |
b581a7f9 | 1133 | wakeup->sleep_state = element->integer.value; |
9e89dde2 | 1134 | |
e88c9c60 RW |
1135 | err = acpi_extract_power_resources(package, 2, &wakeup->resources); |
1136 | if (err) | |
b581a7f9 | 1137 | goto out; |
9e89dde2 | 1138 | |
0596a52b RW |
1139 | if (!list_empty(&wakeup->resources)) { |
1140 | int sleep_state; | |
9e89dde2 | 1141 | |
b5d667eb RW |
1142 | err = acpi_power_wakeup_list_init(&wakeup->resources, |
1143 | &sleep_state); | |
1144 | if (err) { | |
1145 | acpi_handle_warn(handle, "Retrieving current states " | |
1146 | "of wakeup power resources failed\n"); | |
1147 | acpi_power_resources_list_free(&wakeup->resources); | |
1148 | goto out; | |
1149 | } | |
0596a52b RW |
1150 | if (sleep_state < wakeup->sleep_state) { |
1151 | acpi_handle_warn(handle, "Overriding _PRW sleep state " | |
1152 | "(S%d) by S%d from power resources\n", | |
1153 | (int)wakeup->sleep_state, sleep_state); | |
1154 | wakeup->sleep_state = sleep_state; | |
1155 | } | |
1156 | } | |
bba63a29 | 1157 | acpi_setup_gpe_for_wake(handle, wakeup->gpe_device, wakeup->gpe_number); |
9874647b | 1158 | |
b581a7f9 RW |
1159 | out: |
1160 | kfree(buffer.pointer); | |
e88c9c60 | 1161 | return err; |
1da177e4 LT |
1162 | } |
1163 | ||
f517709d | 1164 | static void acpi_bus_set_run_wake_flags(struct acpi_device *device) |
1da177e4 | 1165 | { |
29b71a1c | 1166 | struct acpi_device_id button_device_ids[] = { |
29b71a1c | 1167 | {"PNP0C0C", 0}, |
b7e38304 | 1168 | {"PNP0C0D", 0}, |
29b71a1c TR |
1169 | {"PNP0C0E", 0}, |
1170 | {"", 0}, | |
1171 | }; | |
f517709d RW |
1172 | acpi_status status; |
1173 | acpi_event_status event_status; | |
1174 | ||
b67ea761 | 1175 | device->wakeup.flags.notifier_present = 0; |
f517709d RW |
1176 | |
1177 | /* Power button, Lid switch always enable wakeup */ | |
1178 | if (!acpi_match_device_ids(device, button_device_ids)) { | |
1179 | device->wakeup.flags.run_wake = 1; | |
b7e38304 ZR |
1180 | if (!acpi_match_device_ids(device, &button_device_ids[1])) { |
1181 | /* Do not use Lid/sleep button for S5 wakeup */ | |
1182 | if (device->wakeup.sleep_state == ACPI_STATE_S5) | |
1183 | device->wakeup.sleep_state = ACPI_STATE_S4; | |
1184 | } | |
f2b56bc8 | 1185 | device_set_wakeup_capable(&device->dev, true); |
f517709d RW |
1186 | return; |
1187 | } | |
1188 | ||
e8e18c95 RW |
1189 | status = acpi_get_gpe_status(device->wakeup.gpe_device, |
1190 | device->wakeup.gpe_number, | |
1191 | &event_status); | |
f517709d RW |
1192 | if (status == AE_OK) |
1193 | device->wakeup.flags.run_wake = | |
1194 | !!(event_status & ACPI_EVENT_FLAG_HANDLE); | |
1195 | } | |
1196 | ||
d57d09a4 | 1197 | static void acpi_bus_get_wakeup_device_flags(struct acpi_device *device) |
f517709d | 1198 | { |
d57d09a4 | 1199 | acpi_handle temp; |
f517709d | 1200 | acpi_status status = 0; |
e88c9c60 | 1201 | int err; |
29b71a1c | 1202 | |
d57d09a4 RW |
1203 | /* Presence of _PRW indicates wake capable */ |
1204 | status = acpi_get_handle(device->handle, "_PRW", &temp); | |
1205 | if (ACPI_FAILURE(status)) | |
1206 | return; | |
1207 | ||
e88c9c60 RW |
1208 | err = acpi_bus_extract_wakeup_device_power_package(device->handle, |
1209 | &device->wakeup); | |
1210 | if (err) { | |
1211 | dev_err(&device->dev, "_PRW evaluation error: %d\n", err); | |
d57d09a4 | 1212 | return; |
9e89dde2 | 1213 | } |
1da177e4 | 1214 | |
9e89dde2 | 1215 | device->wakeup.flags.valid = 1; |
9b83ccd2 | 1216 | device->wakeup.prepare_count = 0; |
f517709d | 1217 | acpi_bus_set_run_wake_flags(device); |
729b2bdb ZY |
1218 | /* Call _PSW/_DSW object to disable its ability to wake the sleeping |
1219 | * system for the ACPI device with the _PRW object. | |
1220 | * The _PSW object is depreciated in ACPI 3.0 and is replaced by _DSW. | |
1221 | * So it is necessary to call _DSW object first. Only when it is not | |
1222 | * present will the _PSW object used. | |
1223 | */ | |
e88c9c60 RW |
1224 | err = acpi_device_sleep_wake(device, 0, 0, 0); |
1225 | if (err) | |
77e76609 RW |
1226 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
1227 | "error in _DSW or _PSW evaluation\n")); | |
1da177e4 | 1228 | } |
1da177e4 | 1229 | |
f33ce568 RW |
1230 | static void acpi_bus_init_power_state(struct acpi_device *device, int state) |
1231 | { | |
1232 | struct acpi_device_power_state *ps = &device->power.states[state]; | |
ef85bdbe RW |
1233 | char pathname[5] = { '_', 'P', 'R', '0' + state, '\0' }; |
1234 | struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; | |
f33ce568 RW |
1235 | acpi_handle handle; |
1236 | acpi_status status; | |
bf325f95 | 1237 | |
f33ce568 RW |
1238 | INIT_LIST_HEAD(&ps->resources); |
1239 | ||
ef85bdbe RW |
1240 | /* Evaluate "_PRx" to get referenced power resources */ |
1241 | status = acpi_evaluate_object(device->handle, pathname, NULL, &buffer); | |
1242 | if (ACPI_SUCCESS(status)) { | |
1243 | union acpi_object *package = buffer.pointer; | |
1244 | ||
1245 | if (buffer.length && package | |
1246 | && package->type == ACPI_TYPE_PACKAGE | |
1247 | && package->package.count) { | |
e88c9c60 RW |
1248 | int err = acpi_extract_power_resources(package, 0, |
1249 | &ps->resources); | |
1250 | if (!err) | |
ef85bdbe | 1251 | device->power.flags.power_resources = 1; |
f33ce568 | 1252 | } |
ef85bdbe | 1253 | ACPI_FREE(buffer.pointer); |
f33ce568 RW |
1254 | } |
1255 | ||
1256 | /* Evaluate "_PSx" to see if we can do explicit sets */ | |
ef85bdbe RW |
1257 | pathname[2] = 'S'; |
1258 | status = acpi_get_handle(device->handle, pathname, &handle); | |
f33ce568 RW |
1259 | if (ACPI_SUCCESS(status)) |
1260 | ps->flags.explicit_set = 1; | |
1261 | ||
1262 | /* | |
1263 | * State is valid if there are means to put the device into it. | |
1264 | * D3hot is only valid if _PR3 present. | |
1265 | */ | |
ef85bdbe | 1266 | if (!list_empty(&ps->resources) |
f33ce568 RW |
1267 | || (ps->flags.explicit_set && state < ACPI_STATE_D3_HOT)) { |
1268 | ps->flags.valid = 1; | |
1269 | ps->flags.os_accessible = 1; | |
1270 | } | |
1271 | ||
1272 | ps->power = -1; /* Unknown - driver assigned */ | |
1273 | ps->latency = -1; /* Unknown - driver assigned */ | |
1274 | } | |
1275 | ||
d43e167d | 1276 | static void acpi_bus_get_power_flags(struct acpi_device *device) |
1da177e4 | 1277 | { |
8bc5053b RW |
1278 | acpi_status status; |
1279 | acpi_handle handle; | |
1280 | u32 i; | |
1a365616 | 1281 | |
d43e167d RW |
1282 | /* Presence of _PS0|_PR0 indicates 'power manageable' */ |
1283 | status = acpi_get_handle(device->handle, "_PS0", &handle); | |
1284 | if (ACPI_FAILURE(status)) { | |
1285 | status = acpi_get_handle(device->handle, "_PR0", &handle); | |
1286 | if (ACPI_FAILURE(status)) | |
1287 | return; | |
1288 | } | |
1a365616 | 1289 | |
d43e167d | 1290 | device->flags.power_manageable = 1; |
4be44fcd | 1291 | |
9e89dde2 ZR |
1292 | /* |
1293 | * Power Management Flags | |
1294 | */ | |
1295 | status = acpi_get_handle(device->handle, "_PSC", &handle); | |
1296 | if (ACPI_SUCCESS(status)) | |
1297 | device->power.flags.explicit_get = 1; | |
1298 | status = acpi_get_handle(device->handle, "_IRC", &handle); | |
1299 | if (ACPI_SUCCESS(status)) | |
1300 | device->power.flags.inrush_current = 1; | |
1da177e4 | 1301 | |
9e89dde2 ZR |
1302 | /* |
1303 | * Enumerate supported power management states | |
1304 | */ | |
f33ce568 RW |
1305 | for (i = ACPI_STATE_D0; i <= ACPI_STATE_D3_HOT; i++) |
1306 | acpi_bus_init_power_state(device, i); | |
bf325f95 | 1307 | |
0b224527 | 1308 | INIT_LIST_HEAD(&device->power.states[ACPI_STATE_D3_COLD].resources); |
1da177e4 | 1309 | |
9e89dde2 ZR |
1310 | /* Set defaults for D0 and D3 states (always valid) */ |
1311 | device->power.states[ACPI_STATE_D0].flags.valid = 1; | |
1312 | device->power.states[ACPI_STATE_D0].power = 100; | |
1313 | device->power.states[ACPI_STATE_D3].flags.valid = 1; | |
1314 | device->power.states[ACPI_STATE_D3].power = 0; | |
c8f7a62c | 1315 | |
5c7dd710 RW |
1316 | /* Set D3cold's explicit_set flag if _PS3 exists. */ |
1317 | if (device->power.states[ACPI_STATE_D3_HOT].flags.explicit_set) | |
1318 | device->power.states[ACPI_STATE_D3_COLD].flags.explicit_set = 1; | |
1319 | ||
1399dfcd AL |
1320 | /* Presence of _PS3 or _PRx means we can put the device into D3 cold */ |
1321 | if (device->power.states[ACPI_STATE_D3_HOT].flags.explicit_set || | |
1322 | device->power.flags.power_resources) | |
1323 | device->power.states[ACPI_STATE_D3_COLD].flags.os_accessible = 1; | |
1324 | ||
b3785492 RW |
1325 | if (acpi_bus_init_power(device)) { |
1326 | acpi_free_power_resources_lists(device); | |
1327 | device->flags.power_manageable = 0; | |
1328 | } | |
9e89dde2 | 1329 | } |
c8f7a62c | 1330 | |
d43e167d | 1331 | static void acpi_bus_get_flags(struct acpi_device *device) |
1da177e4 | 1332 | { |
4be44fcd LB |
1333 | acpi_status status = AE_OK; |
1334 | acpi_handle temp = NULL; | |
1da177e4 | 1335 | |
1da177e4 LT |
1336 | /* Presence of _STA indicates 'dynamic_status' */ |
1337 | status = acpi_get_handle(device->handle, "_STA", &temp); | |
1338 | if (ACPI_SUCCESS(status)) | |
1339 | device->flags.dynamic_status = 1; | |
1340 | ||
1da177e4 LT |
1341 | /* Presence of _RMV indicates 'removable' */ |
1342 | status = acpi_get_handle(device->handle, "_RMV", &temp); | |
1343 | if (ACPI_SUCCESS(status)) | |
1344 | device->flags.removable = 1; | |
1345 | ||
1346 | /* Presence of _EJD|_EJ0 indicates 'ejectable' */ | |
1347 | status = acpi_get_handle(device->handle, "_EJD", &temp); | |
1348 | if (ACPI_SUCCESS(status)) | |
1349 | device->flags.ejectable = 1; | |
1350 | else { | |
1351 | status = acpi_get_handle(device->handle, "_EJ0", &temp); | |
1352 | if (ACPI_SUCCESS(status)) | |
1353 | device->flags.ejectable = 1; | |
1354 | } | |
1da177e4 LT |
1355 | } |
1356 | ||
c7bcb4e9 | 1357 | static void acpi_device_get_busid(struct acpi_device *device) |
1da177e4 | 1358 | { |
4be44fcd LB |
1359 | char bus_id[5] = { '?', 0 }; |
1360 | struct acpi_buffer buffer = { sizeof(bus_id), bus_id }; | |
1361 | int i = 0; | |
1da177e4 LT |
1362 | |
1363 | /* | |
1364 | * Bus ID | |
1365 | * ------ | |
1366 | * The device's Bus ID is simply the object name. | |
1367 | * TBD: Shouldn't this value be unique (within the ACPI namespace)? | |
1368 | */ | |
859ac9a4 | 1369 | if (ACPI_IS_ROOT_DEVICE(device)) { |
1da177e4 | 1370 | strcpy(device->pnp.bus_id, "ACPI"); |
859ac9a4 BH |
1371 | return; |
1372 | } | |
1373 | ||
1374 | switch (device->device_type) { | |
1da177e4 LT |
1375 | case ACPI_BUS_TYPE_POWER_BUTTON: |
1376 | strcpy(device->pnp.bus_id, "PWRF"); | |
1377 | break; | |
1378 | case ACPI_BUS_TYPE_SLEEP_BUTTON: | |
1379 | strcpy(device->pnp.bus_id, "SLPF"); | |
1380 | break; | |
1381 | default: | |
66b7ed40 | 1382 | acpi_get_name(device->handle, ACPI_SINGLE_NAME, &buffer); |
1da177e4 LT |
1383 | /* Clean up trailing underscores (if any) */ |
1384 | for (i = 3; i > 1; i--) { | |
1385 | if (bus_id[i] == '_') | |
1386 | bus_id[i] = '\0'; | |
1387 | else | |
1388 | break; | |
1389 | } | |
1390 | strcpy(device->pnp.bus_id, bus_id); | |
1391 | break; | |
1392 | } | |
1393 | } | |
1394 | ||
54735266 ZR |
1395 | /* |
1396 | * acpi_bay_match - see if a device is an ejectable driver bay | |
1397 | * | |
1398 | * If an acpi object is ejectable and has one of the ACPI ATA methods defined, | |
1399 | * then we can safely call it an ejectable drive bay | |
1400 | */ | |
1401 | static int acpi_bay_match(struct acpi_device *device){ | |
1402 | acpi_status status; | |
1403 | acpi_handle handle; | |
1404 | acpi_handle tmp; | |
1405 | acpi_handle phandle; | |
1406 | ||
1407 | handle = device->handle; | |
1408 | ||
1409 | status = acpi_get_handle(handle, "_EJ0", &tmp); | |
1410 | if (ACPI_FAILURE(status)) | |
1411 | return -ENODEV; | |
1412 | ||
1413 | if ((ACPI_SUCCESS(acpi_get_handle(handle, "_GTF", &tmp))) || | |
1414 | (ACPI_SUCCESS(acpi_get_handle(handle, "_GTM", &tmp))) || | |
1415 | (ACPI_SUCCESS(acpi_get_handle(handle, "_STM", &tmp))) || | |
1416 | (ACPI_SUCCESS(acpi_get_handle(handle, "_SDD", &tmp)))) | |
1417 | return 0; | |
1418 | ||
1419 | if (acpi_get_parent(handle, &phandle)) | |
1420 | return -ENODEV; | |
1421 | ||
1422 | if ((ACPI_SUCCESS(acpi_get_handle(phandle, "_GTF", &tmp))) || | |
1423 | (ACPI_SUCCESS(acpi_get_handle(phandle, "_GTM", &tmp))) || | |
1424 | (ACPI_SUCCESS(acpi_get_handle(phandle, "_STM", &tmp))) || | |
1425 | (ACPI_SUCCESS(acpi_get_handle(phandle, "_SDD", &tmp)))) | |
1426 | return 0; | |
1427 | ||
1428 | return -ENODEV; | |
1429 | } | |
1430 | ||
3620f2f2 FS |
1431 | /* |
1432 | * acpi_dock_match - see if a device has a _DCK method | |
1433 | */ | |
1434 | static int acpi_dock_match(struct acpi_device *device) | |
1435 | { | |
1436 | acpi_handle tmp; | |
1437 | return acpi_get_handle(device->handle, "_DCK", &tmp); | |
1438 | } | |
1439 | ||
620e112c | 1440 | const char *acpi_device_hid(struct acpi_device *device) |
15b8dd53 | 1441 | { |
7f47fa6c | 1442 | struct acpi_hardware_id *hid; |
15b8dd53 | 1443 | |
2b2ae7c7 TR |
1444 | if (list_empty(&device->pnp.ids)) |
1445 | return dummy_hid; | |
1446 | ||
7f47fa6c BH |
1447 | hid = list_first_entry(&device->pnp.ids, struct acpi_hardware_id, list); |
1448 | return hid->id; | |
1449 | } | |
1450 | EXPORT_SYMBOL(acpi_device_hid); | |
15b8dd53 | 1451 | |
7f47fa6c BH |
1452 | static void acpi_add_id(struct acpi_device *device, const char *dev_id) |
1453 | { | |
1454 | struct acpi_hardware_id *id; | |
15b8dd53 | 1455 | |
7f47fa6c BH |
1456 | id = kmalloc(sizeof(*id), GFP_KERNEL); |
1457 | if (!id) | |
1458 | return; | |
15b8dd53 | 1459 | |
581de59e | 1460 | id->id = kstrdup(dev_id, GFP_KERNEL); |
7f47fa6c BH |
1461 | if (!id->id) { |
1462 | kfree(id); | |
1463 | return; | |
15b8dd53 BM |
1464 | } |
1465 | ||
7f47fa6c | 1466 | list_add_tail(&id->list, &device->pnp.ids); |
15b8dd53 BM |
1467 | } |
1468 | ||
222e82ac DW |
1469 | /* |
1470 | * Old IBM workstations have a DSDT bug wherein the SMBus object | |
1471 | * lacks the SMBUS01 HID and the methods do not have the necessary "_" | |
1472 | * prefix. Work around this. | |
1473 | */ | |
1474 | static int acpi_ibm_smbus_match(struct acpi_device *device) | |
1475 | { | |
1476 | acpi_handle h_dummy; | |
1477 | struct acpi_buffer path = {ACPI_ALLOCATE_BUFFER, NULL}; | |
1478 | int result; | |
1479 | ||
1480 | if (!dmi_name_in_vendors("IBM")) | |
1481 | return -ENODEV; | |
1482 | ||
1483 | /* Look for SMBS object */ | |
1484 | result = acpi_get_name(device->handle, ACPI_SINGLE_NAME, &path); | |
1485 | if (result) | |
1486 | return result; | |
1487 | ||
1488 | if (strcmp("SMBS", path.pointer)) { | |
1489 | result = -ENODEV; | |
1490 | goto out; | |
1491 | } | |
1492 | ||
1493 | /* Does it have the necessary (but misnamed) methods? */ | |
1494 | result = -ENODEV; | |
1495 | if (ACPI_SUCCESS(acpi_get_handle(device->handle, "SBI", &h_dummy)) && | |
1496 | ACPI_SUCCESS(acpi_get_handle(device->handle, "SBR", &h_dummy)) && | |
1497 | ACPI_SUCCESS(acpi_get_handle(device->handle, "SBW", &h_dummy))) | |
1498 | result = 0; | |
1499 | out: | |
1500 | kfree(path.pointer); | |
1501 | return result; | |
1502 | } | |
1503 | ||
c7bcb4e9 | 1504 | static void acpi_device_set_id(struct acpi_device *device) |
1da177e4 | 1505 | { |
4be44fcd | 1506 | acpi_status status; |
57f3674f | 1507 | struct acpi_device_info *info; |
78e25fef | 1508 | struct acpi_pnp_device_id_list *cid_list; |
7f47fa6c | 1509 | int i; |
1da177e4 | 1510 | |
c7bcb4e9 | 1511 | switch (device->device_type) { |
1da177e4 | 1512 | case ACPI_BUS_TYPE_DEVICE: |
859ac9a4 | 1513 | if (ACPI_IS_ROOT_DEVICE(device)) { |
57f3674f | 1514 | acpi_add_id(device, ACPI_SYSTEM_HID); |
859ac9a4 BH |
1515 | break; |
1516 | } | |
1517 | ||
66b7ed40 | 1518 | status = acpi_get_object_info(device->handle, &info); |
1da177e4 | 1519 | if (ACPI_FAILURE(status)) { |
96b2dd1f | 1520 | printk(KERN_ERR PREFIX "%s: Error reading device info\n", __func__); |
1da177e4 LT |
1521 | return; |
1522 | } | |
1523 | ||
1da177e4 | 1524 | if (info->valid & ACPI_VALID_HID) |
57f3674f BH |
1525 | acpi_add_id(device, info->hardware_id.string); |
1526 | if (info->valid & ACPI_VALID_CID) { | |
15b8dd53 | 1527 | cid_list = &info->compatible_id_list; |
57f3674f BH |
1528 | for (i = 0; i < cid_list->count; i++) |
1529 | acpi_add_id(device, cid_list->ids[i].string); | |
1530 | } | |
1da177e4 LT |
1531 | if (info->valid & ACPI_VALID_ADR) { |
1532 | device->pnp.bus_address = info->address; | |
1533 | device->flags.bus_address = 1; | |
1534 | } | |
ccf78040 LZ |
1535 | if (info->valid & ACPI_VALID_UID) |
1536 | device->pnp.unique_id = kstrdup(info->unique_id.string, | |
1537 | GFP_KERNEL); | |
ae843332 | 1538 | |
a83893ae BH |
1539 | kfree(info); |
1540 | ||
57f3674f BH |
1541 | /* |
1542 | * Some devices don't reliably have _HIDs & _CIDs, so add | |
1543 | * synthetic HIDs to make sure drivers can find them. | |
1544 | */ | |
c3d6de69 | 1545 | if (acpi_is_video_device(device)) |
57f3674f | 1546 | acpi_add_id(device, ACPI_VIDEO_HID); |
3620f2f2 | 1547 | else if (ACPI_SUCCESS(acpi_bay_match(device))) |
57f3674f | 1548 | acpi_add_id(device, ACPI_BAY_HID); |
3620f2f2 | 1549 | else if (ACPI_SUCCESS(acpi_dock_match(device))) |
57f3674f | 1550 | acpi_add_id(device, ACPI_DOCK_HID); |
222e82ac DW |
1551 | else if (!acpi_ibm_smbus_match(device)) |
1552 | acpi_add_id(device, ACPI_SMBUS_IBM_HID); | |
4f5f64cf | 1553 | else if (list_empty(&device->pnp.ids) && |
b7b30de5 BH |
1554 | ACPI_IS_ROOT_DEVICE(device->parent)) { |
1555 | acpi_add_id(device, ACPI_BUS_HID); /* \_SB, LNXSYBUS */ | |
1556 | strcpy(device->pnp.device_name, ACPI_BUS_DEVICE_NAME); | |
1557 | strcpy(device->pnp.device_class, ACPI_BUS_CLASS); | |
1558 | } | |
54735266 | 1559 | |
1da177e4 LT |
1560 | break; |
1561 | case ACPI_BUS_TYPE_POWER: | |
57f3674f | 1562 | acpi_add_id(device, ACPI_POWER_HID); |
1da177e4 LT |
1563 | break; |
1564 | case ACPI_BUS_TYPE_PROCESSOR: | |
57f3674f | 1565 | acpi_add_id(device, ACPI_PROCESSOR_OBJECT_HID); |
1da177e4 | 1566 | break; |
1da177e4 | 1567 | case ACPI_BUS_TYPE_THERMAL: |
57f3674f | 1568 | acpi_add_id(device, ACPI_THERMAL_HID); |
1da177e4 LT |
1569 | break; |
1570 | case ACPI_BUS_TYPE_POWER_BUTTON: | |
57f3674f | 1571 | acpi_add_id(device, ACPI_BUTTON_HID_POWERF); |
1da177e4 LT |
1572 | break; |
1573 | case ACPI_BUS_TYPE_SLEEP_BUTTON: | |
57f3674f | 1574 | acpi_add_id(device, ACPI_BUTTON_HID_SLEEPF); |
1da177e4 LT |
1575 | break; |
1576 | } | |
1da177e4 LT |
1577 | } |
1578 | ||
82c7d5ef RW |
1579 | void acpi_init_device_object(struct acpi_device *device, acpi_handle handle, |
1580 | int type, unsigned long long sta) | |
1da177e4 | 1581 | { |
d43e167d RW |
1582 | INIT_LIST_HEAD(&device->pnp.ids); |
1583 | device->device_type = type; | |
1584 | device->handle = handle; | |
1585 | device->parent = acpi_bus_get_parent(handle); | |
1586 | STRUCT_TO_INT(device->status) = sta; | |
1587 | acpi_device_get_busid(device); | |
1588 | acpi_device_set_id(device); | |
1589 | acpi_bus_get_flags(device); | |
2c0d4fe0 | 1590 | device->flags.match_driver = false; |
cf860be6 RW |
1591 | device_initialize(&device->dev); |
1592 | dev_set_uevent_suppress(&device->dev, true); | |
1593 | } | |
bc3b0772 | 1594 | |
cf860be6 RW |
1595 | void acpi_device_add_finalize(struct acpi_device *device) |
1596 | { | |
2c0d4fe0 | 1597 | device->flags.match_driver = true; |
cf860be6 RW |
1598 | dev_set_uevent_suppress(&device->dev, false); |
1599 | kobject_uevent(&device->dev.kobj, KOBJ_ADD); | |
1da177e4 LT |
1600 | } |
1601 | ||
5c478f49 BH |
1602 | static int acpi_add_single_object(struct acpi_device **child, |
1603 | acpi_handle handle, int type, | |
2c0d4fe0 | 1604 | unsigned long long sta) |
1da177e4 | 1605 | { |
77c24888 BH |
1606 | int result; |
1607 | struct acpi_device *device; | |
29aaefa6 | 1608 | struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; |
1da177e4 | 1609 | |
36bcbec7 | 1610 | device = kzalloc(sizeof(struct acpi_device), GFP_KERNEL); |
1da177e4 | 1611 | if (!device) { |
6468463a | 1612 | printk(KERN_ERR PREFIX "Memory allocation error\n"); |
d550d98d | 1613 | return -ENOMEM; |
1da177e4 | 1614 | } |
1da177e4 | 1615 | |
d43e167d RW |
1616 | acpi_init_device_object(device, handle, type, sta); |
1617 | acpi_bus_get_power_flags(device); | |
d57d09a4 | 1618 | acpi_bus_get_wakeup_device_flags(device); |
1da177e4 | 1619 | |
cf860be6 | 1620 | result = acpi_device_add(device, acpi_device_release); |
d43e167d | 1621 | if (result) { |
718fb0de | 1622 | acpi_device_release(&device->dev); |
d43e167d RW |
1623 | return result; |
1624 | } | |
1da177e4 | 1625 | |
d43e167d | 1626 | acpi_power_add_remove_device(device, true); |
cf860be6 | 1627 | acpi_device_add_finalize(device); |
d43e167d RW |
1628 | acpi_get_name(handle, ACPI_FULL_PATHNAME, &buffer); |
1629 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Added %s [%s] parent %s\n", | |
1630 | dev_name(&device->dev), (char *) buffer.pointer, | |
1631 | device->parent ? dev_name(&device->parent->dev) : "(null)")); | |
1632 | kfree(buffer.pointer); | |
1633 | *child = device; | |
1634 | return 0; | |
bf325f95 RW |
1635 | } |
1636 | ||
778cbc1d BH |
1637 | static int acpi_bus_type_and_status(acpi_handle handle, int *type, |
1638 | unsigned long long *sta) | |
1da177e4 | 1639 | { |
778cbc1d BH |
1640 | acpi_status status; |
1641 | acpi_object_type acpi_type; | |
1da177e4 | 1642 | |
778cbc1d | 1643 | status = acpi_get_type(handle, &acpi_type); |
51a85faf | 1644 | if (ACPI_FAILURE(status)) |
778cbc1d | 1645 | return -ENODEV; |
4be44fcd | 1646 | |
778cbc1d | 1647 | switch (acpi_type) { |
51a85faf BH |
1648 | case ACPI_TYPE_ANY: /* for ACPI_ROOT_OBJECT */ |
1649 | case ACPI_TYPE_DEVICE: | |
778cbc1d BH |
1650 | *type = ACPI_BUS_TYPE_DEVICE; |
1651 | status = acpi_bus_get_status_handle(handle, sta); | |
1652 | if (ACPI_FAILURE(status)) | |
1653 | return -ENODEV; | |
51a85faf BH |
1654 | break; |
1655 | case ACPI_TYPE_PROCESSOR: | |
778cbc1d BH |
1656 | *type = ACPI_BUS_TYPE_PROCESSOR; |
1657 | status = acpi_bus_get_status_handle(handle, sta); | |
1658 | if (ACPI_FAILURE(status)) | |
1659 | return -ENODEV; | |
51a85faf BH |
1660 | break; |
1661 | case ACPI_TYPE_THERMAL: | |
778cbc1d BH |
1662 | *type = ACPI_BUS_TYPE_THERMAL; |
1663 | *sta = ACPI_STA_DEFAULT; | |
51a85faf BH |
1664 | break; |
1665 | case ACPI_TYPE_POWER: | |
778cbc1d BH |
1666 | *type = ACPI_BUS_TYPE_POWER; |
1667 | *sta = ACPI_STA_DEFAULT; | |
51a85faf BH |
1668 | break; |
1669 | default: | |
778cbc1d | 1670 | return -ENODEV; |
51a85faf | 1671 | } |
1da177e4 | 1672 | |
778cbc1d BH |
1673 | return 0; |
1674 | } | |
1675 | ||
4b59cc1f RW |
1676 | static bool acpi_scan_handler_matching(struct acpi_scan_handler *handler, |
1677 | char *idstr, | |
1678 | const struct acpi_device_id **matchid) | |
1679 | { | |
1680 | const struct acpi_device_id *devid; | |
1681 | ||
1682 | for (devid = handler->ids; devid->id[0]; devid++) | |
1683 | if (!strcmp((char *)devid->id, idstr)) { | |
1684 | if (matchid) | |
1685 | *matchid = devid; | |
1686 | ||
1687 | return true; | |
1688 | } | |
1689 | ||
1690 | return false; | |
1691 | } | |
1692 | ||
c5698074 RW |
1693 | static struct acpi_scan_handler *acpi_scan_match_handler(char *idstr, |
1694 | const struct acpi_device_id **matchid) | |
1695 | { | |
1696 | struct acpi_scan_handler *handler; | |
1697 | ||
4b59cc1f RW |
1698 | list_for_each_entry(handler, &acpi_scan_handlers_list, list_node) |
1699 | if (acpi_scan_handler_matching(handler, idstr, matchid)) | |
1700 | return handler; | |
c5698074 | 1701 | |
c5698074 RW |
1702 | return NULL; |
1703 | } | |
1704 | ||
a33ec399 RW |
1705 | static void acpi_scan_init_hotplug(acpi_handle handle) |
1706 | { | |
1707 | struct acpi_device_info *info; | |
1708 | struct acpi_scan_handler *handler; | |
1709 | ||
1710 | if (ACPI_FAILURE(acpi_get_object_info(handle, &info))) | |
1711 | return; | |
1712 | ||
1713 | if (!(info->valid & ACPI_VALID_HID)) { | |
1714 | kfree(info); | |
1715 | return; | |
1716 | } | |
1717 | ||
1718 | /* | |
1719 | * This relies on the fact that acpi_install_notify_handler() will not | |
1720 | * install the same notify handler routine twice for the same handle. | |
1721 | */ | |
1722 | handler = acpi_scan_match_handler(info->hardware_id.string, NULL); | |
1723 | kfree(info); | |
1724 | if (handler && handler->hotplug.enabled) | |
1725 | acpi_install_notify_handler(handle, ACPI_SYSTEM_NOTIFY, | |
1726 | acpi_hotplug_notify_cb, NULL); | |
1727 | } | |
1728 | ||
e3863094 RW |
1729 | static acpi_status acpi_bus_check_add(acpi_handle handle, u32 lvl_not_used, |
1730 | void *not_used, void **return_value) | |
778cbc1d | 1731 | { |
805d410f | 1732 | struct acpi_device *device = NULL; |
778cbc1d BH |
1733 | int type; |
1734 | unsigned long long sta; | |
e3b87f8a | 1735 | acpi_status status; |
778cbc1d BH |
1736 | int result; |
1737 | ||
4002bf38 RW |
1738 | acpi_bus_get_device(handle, &device); |
1739 | if (device) | |
1740 | goto out; | |
1741 | ||
778cbc1d BH |
1742 | result = acpi_bus_type_and_status(handle, &type, &sta); |
1743 | if (result) | |
1744 | return AE_OK; | |
1745 | ||
82c7d5ef RW |
1746 | if (type == ACPI_BUS_TYPE_POWER) { |
1747 | acpi_add_power_resource(handle); | |
1748 | return AE_OK; | |
1749 | } | |
1750 | ||
a33ec399 RW |
1751 | acpi_scan_init_hotplug(handle); |
1752 | ||
778cbc1d | 1753 | if (!(sta & ACPI_STA_DEVICE_PRESENT) && |
b581a7f9 | 1754 | !(sta & ACPI_STA_DEVICE_FUNCTIONING)) { |
86e4e20e RW |
1755 | struct acpi_device_wakeup wakeup; |
1756 | acpi_handle temp; | |
1757 | ||
1758 | status = acpi_get_handle(handle, "_PRW", &temp); | |
993cbe59 | 1759 | if (ACPI_SUCCESS(status)) { |
86e4e20e RW |
1760 | acpi_bus_extract_wakeup_device_power_package(handle, |
1761 | &wakeup); | |
993cbe59 RW |
1762 | acpi_power_resources_list_free(&wakeup.resources); |
1763 | } | |
778cbc1d | 1764 | return AE_CTRL_DEPTH; |
b581a7f9 | 1765 | } |
778cbc1d | 1766 | |
2c0d4fe0 | 1767 | acpi_add_single_object(&device, handle, type, sta); |
e3b87f8a | 1768 | if (!device) |
51a85faf | 1769 | return AE_CTRL_DEPTH; |
1da177e4 | 1770 | |
4002bf38 | 1771 | out: |
51a85faf BH |
1772 | if (!*return_value) |
1773 | *return_value = device; | |
805d410f | 1774 | |
51a85faf BH |
1775 | return AE_OK; |
1776 | } | |
3fb02738 | 1777 | |
c5698074 | 1778 | static int acpi_scan_attach_handler(struct acpi_device *device) |
ca589f94 | 1779 | { |
c5698074 RW |
1780 | struct acpi_hardware_id *hwid; |
1781 | int ret = 0; | |
ca589f94 | 1782 | |
c5698074 | 1783 | list_for_each_entry(hwid, &device->pnp.ids, list) { |
87b85b3c | 1784 | const struct acpi_device_id *devid; |
c5698074 | 1785 | struct acpi_scan_handler *handler; |
ca589f94 | 1786 | |
c5698074 RW |
1787 | handler = acpi_scan_match_handler(hwid->id, &devid); |
1788 | if (handler) { | |
87b85b3c RW |
1789 | ret = handler->attach(device, devid); |
1790 | if (ret > 0) { | |
1791 | device->handler = handler; | |
c5698074 | 1792 | break; |
87b85b3c | 1793 | } else if (ret < 0) { |
c5698074 | 1794 | break; |
87b85b3c | 1795 | } |
ca589f94 RW |
1796 | } |
1797 | } | |
1798 | return ret; | |
1799 | } | |
1800 | ||
0fc300b0 RW |
1801 | static acpi_status acpi_bus_device_attach(acpi_handle handle, u32 lvl_not_used, |
1802 | void *not_used, void **ret_not_used) | |
51a85faf | 1803 | { |
805d410f RW |
1804 | struct acpi_device *device; |
1805 | unsigned long long sta_not_used; | |
ca589f94 | 1806 | int ret; |
3fb02738 | 1807 | |
805d410f RW |
1808 | /* |
1809 | * Ignore errors ignored by acpi_bus_check_add() to avoid terminating | |
1810 | * namespace walks prematurely. | |
1811 | */ | |
ca589f94 | 1812 | if (acpi_bus_type_and_status(handle, &ret, &sta_not_used)) |
805d410f | 1813 | return AE_OK; |
1da177e4 | 1814 | |
805d410f RW |
1815 | if (acpi_bus_get_device(handle, &device)) |
1816 | return AE_CTRL_DEPTH; | |
7779688f | 1817 | |
ca589f94 RW |
1818 | ret = acpi_scan_attach_handler(device); |
1819 | if (ret) | |
1820 | return ret > 0 ? AE_OK : AE_CTRL_DEPTH; | |
1821 | ||
1822 | ret = device_attach(&device->dev); | |
1823 | return ret >= 0 ? AE_OK : AE_CTRL_DEPTH; | |
1da177e4 | 1824 | } |
1da177e4 | 1825 | |
636458de | 1826 | /** |
b8bd759a | 1827 | * acpi_bus_scan - Add ACPI device node objects in a given namespace scope. |
636458de | 1828 | * @handle: Root of the namespace scope to scan. |
7779688f | 1829 | * |
636458de RW |
1830 | * Scan a given ACPI tree (probably recently hot-plugged) and create and add |
1831 | * found devices. | |
7779688f | 1832 | * |
636458de RW |
1833 | * If no devices were found, -ENODEV is returned, but it does not mean that |
1834 | * there has been a real error. There just have been no suitable ACPI objects | |
1835 | * in the table trunk from which the kernel could create a device and add an | |
1836 | * appropriate driver. | |
3757b948 RW |
1837 | * |
1838 | * Must be called under acpi_scan_lock. | |
7779688f | 1839 | */ |
b8bd759a | 1840 | int acpi_bus_scan(acpi_handle handle) |
3fb02738 | 1841 | { |
b8bd759a | 1842 | void *device = NULL; |
c511cc19 | 1843 | int error = 0; |
3fb02738 | 1844 | |
b8bd759a RW |
1845 | if (ACPI_SUCCESS(acpi_bus_check_add(handle, 0, NULL, &device))) |
1846 | acpi_walk_namespace(ACPI_TYPE_ANY, handle, ACPI_UINT32_MAX, | |
1847 | acpi_bus_check_add, NULL, NULL, &device); | |
3fb02738 | 1848 | |
d2f6650a | 1849 | if (!device) |
c511cc19 RW |
1850 | error = -ENODEV; |
1851 | else if (ACPI_SUCCESS(acpi_bus_device_attach(handle, 0, NULL, NULL))) | |
b8bd759a RW |
1852 | acpi_walk_namespace(ACPI_TYPE_ANY, handle, ACPI_UINT32_MAX, |
1853 | acpi_bus_device_attach, NULL, NULL, NULL); | |
3fb02738 | 1854 | |
c511cc19 | 1855 | return error; |
3fb02738 | 1856 | } |
b8bd759a | 1857 | EXPORT_SYMBOL(acpi_bus_scan); |
a2100801 | 1858 | |
05404d8f RW |
1859 | static acpi_status acpi_bus_device_detach(acpi_handle handle, u32 lvl_not_used, |
1860 | void *not_used, void **ret_not_used) | |
1861 | { | |
1862 | struct acpi_device *device = NULL; | |
a2100801 | 1863 | |
05404d8f | 1864 | if (!acpi_bus_get_device(handle, &device)) { |
ca589f94 RW |
1865 | struct acpi_scan_handler *dev_handler = device->handler; |
1866 | ||
05404d8f | 1867 | device->removal_type = ACPI_BUS_REMOVAL_EJECT; |
ca589f94 RW |
1868 | if (dev_handler) { |
1869 | if (dev_handler->detach) | |
1870 | dev_handler->detach(device); | |
1871 | ||
1872 | device->handler = NULL; | |
1873 | } else { | |
1874 | device_release_driver(&device->dev); | |
1875 | } | |
05404d8f RW |
1876 | } |
1877 | return AE_OK; | |
3fb02738 | 1878 | } |
1da177e4 | 1879 | |
05404d8f RW |
1880 | static acpi_status acpi_bus_remove(acpi_handle handle, u32 lvl_not_used, |
1881 | void *not_used, void **ret_not_used) | |
1da177e4 | 1882 | { |
05404d8f | 1883 | struct acpi_device *device = NULL; |
4be44fcd | 1884 | |
05404d8f RW |
1885 | if (!acpi_bus_get_device(handle, &device)) |
1886 | acpi_device_unregister(device); | |
1da177e4 | 1887 | |
05404d8f RW |
1888 | return AE_OK; |
1889 | } | |
1da177e4 | 1890 | |
3757b948 RW |
1891 | /** |
1892 | * acpi_bus_trim - Remove ACPI device node and all of its descendants | |
1893 | * @start: Root of the ACPI device nodes subtree to remove. | |
1894 | * | |
1895 | * Must be called under acpi_scan_lock. | |
1896 | */ | |
bfee26db | 1897 | void acpi_bus_trim(struct acpi_device *start) |
1da177e4 | 1898 | { |
05404d8f RW |
1899 | /* |
1900 | * Execute acpi_bus_device_detach() as a post-order callback to detach | |
1901 | * all ACPI drivers from the device nodes being removed. | |
1902 | */ | |
1903 | acpi_walk_namespace(ACPI_TYPE_ANY, start->handle, ACPI_UINT32_MAX, NULL, | |
1904 | acpi_bus_device_detach, NULL, NULL); | |
1905 | acpi_bus_device_detach(start->handle, 0, NULL, NULL); | |
cecdb193 RW |
1906 | /* |
1907 | * Execute acpi_bus_remove() as a post-order callback to remove device | |
1908 | * nodes in the given namespace scope. | |
1909 | */ | |
1910 | acpi_walk_namespace(ACPI_TYPE_ANY, start->handle, ACPI_UINT32_MAX, NULL, | |
1911 | acpi_bus_remove, NULL, NULL); | |
1912 | acpi_bus_remove(start->handle, 0, NULL, NULL); | |
1da177e4 | 1913 | } |
ceaba663 KA |
1914 | EXPORT_SYMBOL_GPL(acpi_bus_trim); |
1915 | ||
e8b945c9 | 1916 | static int acpi_bus_scan_fixed(void) |
1da177e4 | 1917 | { |
4be44fcd | 1918 | int result = 0; |
c4168bff | 1919 | |
1da177e4 LT |
1920 | /* |
1921 | * Enumerate all fixed-feature devices. | |
1922 | */ | |
2c0d4fe0 RW |
1923 | if (!(acpi_gbl_FADT.flags & ACPI_FADT_POWER_BUTTON)) { |
1924 | struct acpi_device *device = NULL; | |
1925 | ||
5c478f49 | 1926 | result = acpi_add_single_object(&device, NULL, |
c4168bff | 1927 | ACPI_BUS_TYPE_POWER_BUTTON, |
2c0d4fe0 RW |
1928 | ACPI_STA_DEFAULT); |
1929 | if (result) | |
1930 | return result; | |
1931 | ||
1932 | result = device_attach(&device->dev); | |
1933 | if (result < 0) | |
1934 | return result; | |
1935 | ||
c10d7a13 | 1936 | device_init_wakeup(&device->dev, true); |
3fb02738 | 1937 | } |
1da177e4 | 1938 | |
2c0d4fe0 RW |
1939 | if (!(acpi_gbl_FADT.flags & ACPI_FADT_SLEEP_BUTTON)) { |
1940 | struct acpi_device *device = NULL; | |
1941 | ||
5c478f49 | 1942 | result = acpi_add_single_object(&device, NULL, |
c4168bff | 1943 | ACPI_BUS_TYPE_SLEEP_BUTTON, |
2c0d4fe0 RW |
1944 | ACPI_STA_DEFAULT); |
1945 | if (result) | |
1946 | return result; | |
1947 | ||
1948 | result = device_attach(&device->dev); | |
3fb02738 | 1949 | } |
1da177e4 | 1950 | |
2c0d4fe0 | 1951 | return result < 0 ? result : 0; |
1da177e4 LT |
1952 | } |
1953 | ||
e747f274 | 1954 | int __init acpi_scan_init(void) |
1da177e4 LT |
1955 | { |
1956 | int result; | |
1da177e4 | 1957 | |
5b327265 PM |
1958 | result = bus_register(&acpi_bus_type); |
1959 | if (result) { | |
1960 | /* We don't want to quit even if we failed to add suspend/resume */ | |
1961 | printk(KERN_ERR PREFIX "Could not register bus type\n"); | |
1962 | } | |
1963 | ||
92ef2a25 | 1964 | acpi_pci_root_init(); |
4daeaf68 | 1965 | acpi_pci_link_init(); |
141a297b | 1966 | acpi_platform_init(); |
13176bbf | 1967 | acpi_csrt_init(); |
737f1a9f | 1968 | acpi_container_init(); |
ab1a2e03 | 1969 | acpi_pci_slot_init(); |
97d9a9e9 | 1970 | |
3757b948 | 1971 | mutex_lock(&acpi_scan_lock); |
1da177e4 LT |
1972 | /* |
1973 | * Enumerate devices in the ACPI namespace. | |
1974 | */ | |
0cd6ac52 RW |
1975 | result = acpi_bus_scan(ACPI_ROOT_OBJECT); |
1976 | if (result) | |
3757b948 | 1977 | goto out; |
1da177e4 | 1978 | |
0cd6ac52 | 1979 | result = acpi_bus_get_device(ACPI_ROOT_OBJECT, &acpi_root); |
1da177e4 | 1980 | if (result) |
3757b948 | 1981 | goto out; |
1da177e4 | 1982 | |
b8bd759a RW |
1983 | result = acpi_bus_scan_fixed(); |
1984 | if (result) { | |
b17b537a | 1985 | acpi_device_unregister(acpi_root); |
3757b948 | 1986 | goto out; |
b8bd759a | 1987 | } |
1da177e4 | 1988 | |
b8bd759a | 1989 | acpi_update_all_gpes(); |
3757b948 | 1990 | |
668192b6 YL |
1991 | acpi_pci_root_hp_init(); |
1992 | ||
3757b948 RW |
1993 | out: |
1994 | mutex_unlock(&acpi_scan_lock); | |
1995 | return result; | |
1da177e4 | 1996 | } |