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Commit | Line | Data |
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1da177e4 LT |
1 | /* |
2 | * scan.c - support for transforming the ACPI namespace into individual objects | |
3 | */ | |
4 | ||
5 | #include <linux/module.h> | |
6 | #include <linux/init.h> | |
5a0e3ad6 | 7 | #include <linux/slab.h> |
9b6d97b6 | 8 | #include <linux/kernel.h> |
1da177e4 | 9 | #include <linux/acpi.h> |
74523c90 AK |
10 | #include <linux/signal.h> |
11 | #include <linux/kthread.h> | |
222e82ac | 12 | #include <linux/dmi.h> |
d1efe3c3 | 13 | #include <linux/nls.h> |
1da177e4 LT |
14 | |
15 | #include <acpi/acpi_drivers.h> | |
1da177e4 | 16 | |
e60cc7a6 BH |
17 | #include "internal.h" |
18 | ||
1da177e4 | 19 | #define _COMPONENT ACPI_BUS_COMPONENT |
f52fd66d | 20 | ACPI_MODULE_NAME("scan"); |
1da177e4 | 21 | #define STRUCT_TO_INT(s) (*((int*)&s)) |
4be44fcd | 22 | extern struct acpi_device *acpi_root; |
1da177e4 LT |
23 | |
24 | #define ACPI_BUS_CLASS "system_bus" | |
29b71a1c | 25 | #define ACPI_BUS_HID "LNXSYBUS" |
1da177e4 LT |
26 | #define ACPI_BUS_DEVICE_NAME "System Bus" |
27 | ||
859ac9a4 BH |
28 | #define ACPI_IS_ROOT_DEVICE(device) (!(device)->parent) |
29 | ||
620e112c | 30 | static const char *dummy_hid = "device"; |
2b2ae7c7 | 31 | |
1da177e4 | 32 | static LIST_HEAD(acpi_device_list); |
e49bd2dd | 33 | static LIST_HEAD(acpi_bus_id_list); |
c511cc19 | 34 | static DEFINE_MUTEX(acpi_scan_lock); |
ca589f94 | 35 | static LIST_HEAD(acpi_scan_handlers_list); |
9090589d | 36 | DEFINE_MUTEX(acpi_device_lock); |
1da177e4 LT |
37 | LIST_HEAD(acpi_wakeup_device_list); |
38 | ||
e49bd2dd | 39 | struct acpi_device_bus_id{ |
bb095854 | 40 | char bus_id[15]; |
e49bd2dd ZR |
41 | unsigned int instance_no; |
42 | struct list_head node; | |
1da177e4 | 43 | }; |
29b71a1c | 44 | |
3757b948 RW |
45 | void acpi_scan_lock_acquire(void) |
46 | { | |
47 | mutex_lock(&acpi_scan_lock); | |
48 | } | |
49 | EXPORT_SYMBOL_GPL(acpi_scan_lock_acquire); | |
50 | ||
51 | void acpi_scan_lock_release(void) | |
52 | { | |
53 | mutex_unlock(&acpi_scan_lock); | |
54 | } | |
55 | EXPORT_SYMBOL_GPL(acpi_scan_lock_release); | |
56 | ||
ca589f94 RW |
57 | int acpi_scan_add_handler(struct acpi_scan_handler *handler) |
58 | { | |
59 | if (!handler || !handler->attach) | |
60 | return -EINVAL; | |
61 | ||
62 | list_add_tail(&handler->list_node, &acpi_scan_handlers_list); | |
63 | return 0; | |
64 | } | |
65 | ||
3f8055c3 RW |
66 | int acpi_scan_add_handler_with_hotplug(struct acpi_scan_handler *handler, |
67 | const char *hotplug_profile_name) | |
68 | { | |
69 | int error; | |
70 | ||
71 | error = acpi_scan_add_handler(handler); | |
72 | if (error) | |
73 | return error; | |
74 | ||
75 | acpi_sysfs_add_hotplug_profile(&handler->hotplug, hotplug_profile_name); | |
76 | return 0; | |
77 | } | |
78 | ||
29b71a1c TR |
79 | /* |
80 | * Creates hid/cid(s) string needed for modalias and uevent | |
81 | * e.g. on a device with hid:IBM0001 and cid:ACPI0001 you get: | |
82 | * char *modalias: "acpi:IBM0001:ACPI0001" | |
83 | */ | |
b3e572d2 AB |
84 | static int create_modalias(struct acpi_device *acpi_dev, char *modalias, |
85 | int size) | |
86 | { | |
29b71a1c | 87 | int len; |
5c9fcb5d | 88 | int count; |
7f47fa6c | 89 | struct acpi_hardware_id *id; |
29b71a1c | 90 | |
2b2ae7c7 TR |
91 | if (list_empty(&acpi_dev->pnp.ids)) |
92 | return 0; | |
93 | ||
5c9fcb5d | 94 | len = snprintf(modalias, size, "acpi:"); |
29b71a1c TR |
95 | size -= len; |
96 | ||
7f47fa6c BH |
97 | list_for_each_entry(id, &acpi_dev->pnp.ids, list) { |
98 | count = snprintf(&modalias[len], size, "%s:", id->id); | |
5c9fcb5d ZR |
99 | if (count < 0 || count >= size) |
100 | return -EINVAL; | |
101 | len += count; | |
102 | size -= count; | |
103 | } | |
104 | ||
29b71a1c TR |
105 | modalias[len] = '\0'; |
106 | return len; | |
107 | } | |
108 | ||
109 | static ssize_t | |
110 | acpi_device_modalias_show(struct device *dev, struct device_attribute *attr, char *buf) { | |
111 | struct acpi_device *acpi_dev = to_acpi_device(dev); | |
112 | int len; | |
113 | ||
114 | /* Device has no HID and no CID or string is >1024 */ | |
115 | len = create_modalias(acpi_dev, buf, 1024); | |
116 | if (len <= 0) | |
117 | return 0; | |
118 | buf[len++] = '\n'; | |
119 | return len; | |
120 | } | |
121 | static DEVICE_ATTR(modalias, 0444, acpi_device_modalias_show, NULL); | |
122 | ||
a33ec399 | 123 | static int acpi_scan_hot_remove(struct acpi_device *device) |
1da177e4 | 124 | { |
5993c467 | 125 | acpi_handle handle = device->handle; |
a33ec399 | 126 | acpi_handle not_used; |
1da177e4 LT |
127 | struct acpi_object_list arg_list; |
128 | union acpi_object arg; | |
a33ec399 | 129 | acpi_status status; |
f058cdf4 | 130 | |
3757b948 | 131 | /* If there is no handle, the device node has been unregistered. */ |
a33ec399 | 132 | if (!handle) { |
3757b948 RW |
133 | dev_dbg(&device->dev, "ACPI handle missing\n"); |
134 | put_device(&device->dev); | |
a33ec399 | 135 | return -EINVAL; |
3757b948 RW |
136 | } |
137 | ||
26d46867 | 138 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
0794469d | 139 | "Hot-removing device %s...\n", dev_name(&device->dev))); |
26d46867 | 140 | |
bfee26db | 141 | acpi_bus_trim(device); |
3757b948 RW |
142 | /* Device node has been unregistered. */ |
143 | put_device(&device->dev); | |
b3c450c3 TK |
144 | device = NULL; |
145 | ||
a33ec399 | 146 | if (ACPI_SUCCESS(acpi_get_handle(handle, "_LCK", ¬_used))) { |
1da177e4 LT |
147 | arg_list.count = 1; |
148 | arg_list.pointer = &arg; | |
149 | arg.type = ACPI_TYPE_INTEGER; | |
150 | arg.integer.value = 0; | |
151 | acpi_evaluate_object(handle, "_LCK", &arg_list, NULL); | |
152 | } | |
1da177e4 | 153 | |
1da177e4 LT |
154 | arg_list.count = 1; |
155 | arg_list.pointer = &arg; | |
156 | arg.type = ACPI_TYPE_INTEGER; | |
157 | arg.integer.value = 1; | |
1da177e4 | 158 | |
1da177e4 LT |
159 | /* |
160 | * TBD: _EJD support. | |
161 | */ | |
1da177e4 | 162 | status = acpi_evaluate_object(handle, "_EJ0", &arg_list, NULL); |
c4753e57 | 163 | if (ACPI_FAILURE(status)) { |
a33ec399 RW |
164 | if (status == AE_NOT_FOUND) { |
165 | return -ENODEV; | |
166 | } else { | |
f058cdf4 | 167 | acpi_handle_warn(handle, "Eject failed\n"); |
a33ec399 RW |
168 | return -EIO; |
169 | } | |
170 | } | |
171 | return 0; | |
172 | } | |
1da177e4 | 173 | |
a33ec399 RW |
174 | static void acpi_bus_device_eject(void *context) |
175 | { | |
176 | acpi_handle handle = context; | |
177 | struct acpi_device *device = NULL; | |
178 | struct acpi_scan_handler *handler; | |
179 | u32 ost_code = ACPI_OST_SC_NON_SPECIFIC_FAILURE; | |
180 | ||
181 | mutex_lock(&acpi_scan_lock); | |
182 | ||
183 | acpi_bus_get_device(handle, &device); | |
184 | if (!device) | |
185 | goto err_out; | |
186 | ||
187 | handler = device->handler; | |
188 | if (!handler || !handler->hotplug.enabled) { | |
189 | ost_code = ACPI_OST_SC_EJECT_NOT_SUPPORTED; | |
190 | goto err_out; | |
191 | } | |
192 | acpi_evaluate_hotplug_ost(handle, ACPI_NOTIFY_EJECT_REQUEST, | |
193 | ACPI_OST_SC_EJECT_IN_PROGRESS, NULL); | |
194 | if (handler->hotplug.mode == AHM_CONTAINER) { | |
195 | device->flags.eject_pending = true; | |
196 | kobject_uevent(&device->dev.kobj, KOBJ_OFFLINE); | |
197 | } else { | |
198 | int error; | |
199 | ||
200 | get_device(&device->dev); | |
201 | error = acpi_scan_hot_remove(device); | |
202 | if (error) | |
203 | goto err_out; | |
f058cdf4 | 204 | } |
1da177e4 | 205 | |
3757b948 | 206 | out: |
f058cdf4 | 207 | mutex_unlock(&acpi_scan_lock); |
c8d72a5e | 208 | return; |
a33ec399 RW |
209 | |
210 | err_out: | |
211 | acpi_evaluate_hotplug_ost(handle, ACPI_NOTIFY_EJECT_REQUEST, ost_code, | |
212 | NULL); | |
213 | goto out; | |
214 | } | |
215 | ||
216 | static void acpi_scan_bus_device_check(acpi_handle handle, u32 ost_source) | |
217 | { | |
218 | struct acpi_device *device = NULL; | |
219 | u32 ost_code = ACPI_OST_SC_NON_SPECIFIC_FAILURE; | |
220 | int error; | |
221 | ||
222 | mutex_lock(&acpi_scan_lock); | |
223 | ||
224 | acpi_bus_get_device(handle, &device); | |
225 | if (device) { | |
226 | dev_warn(&device->dev, "Attempt to re-insert\n"); | |
227 | goto out; | |
228 | } | |
229 | acpi_evaluate_hotplug_ost(handle, ost_source, | |
230 | ACPI_OST_SC_INSERT_IN_PROGRESS, NULL); | |
231 | error = acpi_bus_scan(handle); | |
232 | if (error) { | |
233 | acpi_handle_warn(handle, "Namespace scan failure\n"); | |
234 | goto out; | |
235 | } | |
236 | error = acpi_bus_get_device(handle, &device); | |
237 | if (error) { | |
238 | acpi_handle_warn(handle, "Missing device node object\n"); | |
239 | goto out; | |
240 | } | |
241 | ost_code = ACPI_OST_SC_SUCCESS; | |
242 | if (device->handler && device->handler->hotplug.mode == AHM_CONTAINER) | |
243 | kobject_uevent(&device->dev.kobj, KOBJ_ONLINE); | |
244 | ||
245 | out: | |
246 | acpi_evaluate_hotplug_ost(handle, ost_source, ost_code, NULL); | |
247 | mutex_unlock(&acpi_scan_lock); | |
248 | } | |
249 | ||
250 | static void acpi_scan_bus_check(void *context) | |
251 | { | |
252 | acpi_scan_bus_device_check((acpi_handle)context, | |
253 | ACPI_NOTIFY_BUS_CHECK); | |
254 | } | |
255 | ||
256 | static void acpi_scan_device_check(void *context) | |
257 | { | |
258 | acpi_scan_bus_device_check((acpi_handle)context, | |
259 | ACPI_NOTIFY_DEVICE_CHECK); | |
260 | } | |
261 | ||
2cbb14fb TK |
262 | static void acpi_hotplug_unsupported(acpi_handle handle, u32 type) |
263 | { | |
264 | u32 ost_status; | |
265 | ||
266 | switch (type) { | |
267 | case ACPI_NOTIFY_BUS_CHECK: | |
268 | acpi_handle_debug(handle, | |
269 | "ACPI_NOTIFY_BUS_CHECK event: unsupported\n"); | |
270 | ost_status = ACPI_OST_SC_INSERT_NOT_SUPPORTED; | |
271 | break; | |
272 | case ACPI_NOTIFY_DEVICE_CHECK: | |
273 | acpi_handle_debug(handle, | |
274 | "ACPI_NOTIFY_DEVICE_CHECK event: unsupported\n"); | |
275 | ost_status = ACPI_OST_SC_INSERT_NOT_SUPPORTED; | |
276 | break; | |
277 | case ACPI_NOTIFY_EJECT_REQUEST: | |
278 | acpi_handle_debug(handle, | |
279 | "ACPI_NOTIFY_EJECT_REQUEST event: unsupported\n"); | |
280 | ost_status = ACPI_OST_SC_EJECT_NOT_SUPPORTED; | |
281 | break; | |
282 | default: | |
283 | /* non-hotplug event; possibly handled by other handler */ | |
284 | return; | |
285 | } | |
286 | ||
287 | acpi_evaluate_hotplug_ost(handle, type, ost_status, NULL); | |
288 | } | |
289 | ||
290 | static void acpi_hotplug_notify_cb(acpi_handle handle, u32 type, void *data) | |
a33ec399 RW |
291 | { |
292 | acpi_osd_exec_callback callback; | |
2cbb14fb | 293 | struct acpi_scan_handler *handler = data; |
a33ec399 RW |
294 | acpi_status status; |
295 | ||
2cbb14fb TK |
296 | if (!handler->hotplug.enabled) |
297 | return acpi_hotplug_unsupported(handle, type); | |
298 | ||
a33ec399 RW |
299 | switch (type) { |
300 | case ACPI_NOTIFY_BUS_CHECK: | |
301 | acpi_handle_debug(handle, "ACPI_NOTIFY_BUS_CHECK event\n"); | |
302 | callback = acpi_scan_bus_check; | |
303 | break; | |
304 | case ACPI_NOTIFY_DEVICE_CHECK: | |
305 | acpi_handle_debug(handle, "ACPI_NOTIFY_DEVICE_CHECK event\n"); | |
306 | callback = acpi_scan_device_check; | |
307 | break; | |
308 | case ACPI_NOTIFY_EJECT_REQUEST: | |
309 | acpi_handle_debug(handle, "ACPI_NOTIFY_EJECT_REQUEST event\n"); | |
310 | callback = acpi_bus_device_eject; | |
311 | break; | |
312 | default: | |
313 | /* non-hotplug event; possibly handled by other handler */ | |
314 | return; | |
315 | } | |
316 | status = acpi_os_hotplug_execute(callback, handle); | |
317 | if (ACPI_FAILURE(status)) | |
318 | acpi_evaluate_hotplug_ost(handle, type, | |
319 | ACPI_OST_SC_NON_SPECIFIC_FAILURE, | |
320 | NULL); | |
321 | } | |
322 | ||
323 | /** | |
324 | * acpi_bus_hot_remove_device: hot-remove a device and its children | |
325 | * @context: struct acpi_eject_event pointer (freed in this func) | |
326 | * | |
327 | * Hot-remove a device and its children. This function frees up the | |
328 | * memory space passed by arg context, so that the caller may call | |
329 | * this function asynchronously through acpi_os_hotplug_execute(). | |
330 | */ | |
331 | void acpi_bus_hot_remove_device(void *context) | |
332 | { | |
333 | struct acpi_eject_event *ej_event = context; | |
334 | struct acpi_device *device = ej_event->device; | |
335 | acpi_handle handle = device->handle; | |
336 | int error; | |
337 | ||
338 | mutex_lock(&acpi_scan_lock); | |
339 | ||
340 | error = acpi_scan_hot_remove(device); | |
341 | if (error && handle) | |
342 | acpi_evaluate_hotplug_ost(handle, ej_event->event, | |
343 | ACPI_OST_SC_NON_SPECIFIC_FAILURE, | |
344 | NULL); | |
345 | ||
346 | mutex_unlock(&acpi_scan_lock); | |
347 | kfree(context); | |
1da177e4 | 348 | } |
61622acc | 349 | EXPORT_SYMBOL(acpi_bus_hot_remove_device); |
1da177e4 | 350 | |
836aedb1 RW |
351 | static ssize_t real_power_state_show(struct device *dev, |
352 | struct device_attribute *attr, char *buf) | |
353 | { | |
354 | struct acpi_device *adev = to_acpi_device(dev); | |
355 | int state; | |
356 | int ret; | |
357 | ||
358 | ret = acpi_device_get_power(adev, &state); | |
359 | if (ret) | |
360 | return ret; | |
361 | ||
362 | return sprintf(buf, "%s\n", acpi_power_state_string(state)); | |
363 | } | |
364 | ||
365 | static DEVICE_ATTR(real_power_state, 0444, real_power_state_show, NULL); | |
366 | ||
367 | static ssize_t power_state_show(struct device *dev, | |
368 | struct device_attribute *attr, char *buf) | |
369 | { | |
370 | struct acpi_device *adev = to_acpi_device(dev); | |
371 | ||
372 | return sprintf(buf, "%s\n", acpi_power_state_string(adev->power.state)); | |
373 | } | |
374 | ||
375 | static DEVICE_ATTR(power_state, 0444, power_state_show, NULL); | |
376 | ||
1da177e4 | 377 | static ssize_t |
f883d9db PM |
378 | acpi_eject_store(struct device *d, struct device_attribute *attr, |
379 | const char *buf, size_t count) | |
1da177e4 | 380 | { |
f883d9db | 381 | struct acpi_device *acpi_device = to_acpi_device(d); |
c4753e57 | 382 | struct acpi_eject_event *ej_event; |
a33ec399 RW |
383 | acpi_object_type not_used; |
384 | acpi_status status; | |
385 | u32 ost_source; | |
386 | int ret; | |
1da177e4 | 387 | |
a33ec399 | 388 | if (!count || buf[0] != '1') |
1da177e4 | 389 | return -EINVAL; |
1da177e4 | 390 | |
a33ec399 RW |
391 | if ((!acpi_device->handler || !acpi_device->handler->hotplug.enabled) |
392 | && !acpi_device->driver) | |
393 | return -ENODEV; | |
394 | ||
395 | status = acpi_get_type(acpi_device->handle, ¬_used); | |
396 | if (ACPI_FAILURE(status) || !acpi_device->flags.ejectable) | |
397 | return -ENODEV; | |
398 | ||
399 | mutex_lock(&acpi_scan_lock); | |
c4753e57 | 400 | |
c4753e57 | 401 | if (acpi_device->flags.eject_pending) { |
a33ec399 RW |
402 | /* ACPI eject notification event. */ |
403 | ost_source = ACPI_NOTIFY_EJECT_REQUEST; | |
c4753e57 TK |
404 | acpi_device->flags.eject_pending = 0; |
405 | } else { | |
a33ec399 RW |
406 | /* Eject initiated by user space. */ |
407 | ost_source = ACPI_OST_EC_OSPM_EJECT; | |
c4753e57 | 408 | } |
a33ec399 RW |
409 | ej_event = kmalloc(sizeof(*ej_event), GFP_KERNEL); |
410 | if (!ej_event) { | |
411 | ret = -ENOMEM; | |
412 | goto err_out; | |
413 | } | |
414 | acpi_evaluate_hotplug_ost(acpi_device->handle, ost_source, | |
415 | ACPI_OST_SC_EJECT_IN_PROGRESS, NULL); | |
416 | ej_event->device = acpi_device; | |
417 | ej_event->event = ost_source; | |
418 | get_device(&acpi_device->dev); | |
3757b948 RW |
419 | status = acpi_os_hotplug_execute(acpi_bus_hot_remove_device, ej_event); |
420 | if (ACPI_FAILURE(status)) { | |
421 | put_device(&acpi_device->dev); | |
422 | kfree(ej_event); | |
a33ec399 RW |
423 | ret = status == AE_NO_MEMORY ? -ENOMEM : -EAGAIN; |
424 | goto err_out; | |
3757b948 | 425 | } |
a33ec399 RW |
426 | ret = count; |
427 | ||
428 | out: | |
429 | mutex_unlock(&acpi_scan_lock); | |
1da177e4 | 430 | return ret; |
a33ec399 RW |
431 | |
432 | err_out: | |
433 | acpi_evaluate_hotplug_ost(acpi_device->handle, ost_source, | |
434 | ACPI_OST_SC_NON_SPECIFIC_FAILURE, NULL); | |
435 | goto out; | |
1da177e4 LT |
436 | } |
437 | ||
f883d9db | 438 | static DEVICE_ATTR(eject, 0200, NULL, acpi_eject_store); |
1da177e4 | 439 | |
e49bd2dd ZR |
440 | static ssize_t |
441 | acpi_device_hid_show(struct device *dev, struct device_attribute *attr, char *buf) { | |
442 | struct acpi_device *acpi_dev = to_acpi_device(dev); | |
1da177e4 | 443 | |
ea8d82fd | 444 | return sprintf(buf, "%s\n", acpi_device_hid(acpi_dev)); |
1da177e4 | 445 | } |
e49bd2dd | 446 | static DEVICE_ATTR(hid, 0444, acpi_device_hid_show, NULL); |
1da177e4 | 447 | |
923d4a45 LZ |
448 | static ssize_t acpi_device_uid_show(struct device *dev, |
449 | struct device_attribute *attr, char *buf) | |
450 | { | |
451 | struct acpi_device *acpi_dev = to_acpi_device(dev); | |
452 | ||
453 | return sprintf(buf, "%s\n", acpi_dev->pnp.unique_id); | |
454 | } | |
455 | static DEVICE_ATTR(uid, 0444, acpi_device_uid_show, NULL); | |
456 | ||
457 | static ssize_t acpi_device_adr_show(struct device *dev, | |
458 | struct device_attribute *attr, char *buf) | |
459 | { | |
460 | struct acpi_device *acpi_dev = to_acpi_device(dev); | |
461 | ||
462 | return sprintf(buf, "0x%08x\n", | |
463 | (unsigned int)(acpi_dev->pnp.bus_address)); | |
464 | } | |
465 | static DEVICE_ATTR(adr, 0444, acpi_device_adr_show, NULL); | |
466 | ||
e49bd2dd ZR |
467 | static ssize_t |
468 | acpi_device_path_show(struct device *dev, struct device_attribute *attr, char *buf) { | |
469 | struct acpi_device *acpi_dev = to_acpi_device(dev); | |
470 | struct acpi_buffer path = {ACPI_ALLOCATE_BUFFER, NULL}; | |
471 | int result; | |
1da177e4 | 472 | |
e49bd2dd | 473 | result = acpi_get_name(acpi_dev->handle, ACPI_FULL_PATHNAME, &path); |
0c526d96 | 474 | if (result) |
e49bd2dd | 475 | goto end; |
1da177e4 | 476 | |
e49bd2dd ZR |
477 | result = sprintf(buf, "%s\n", (char*)path.pointer); |
478 | kfree(path.pointer); | |
0c526d96 | 479 | end: |
e49bd2dd | 480 | return result; |
1da177e4 | 481 | } |
e49bd2dd | 482 | static DEVICE_ATTR(path, 0444, acpi_device_path_show, NULL); |
1da177e4 | 483 | |
d1efe3c3 LO |
484 | /* sysfs file that shows description text from the ACPI _STR method */ |
485 | static ssize_t description_show(struct device *dev, | |
486 | struct device_attribute *attr, | |
487 | char *buf) { | |
488 | struct acpi_device *acpi_dev = to_acpi_device(dev); | |
489 | int result; | |
490 | ||
491 | if (acpi_dev->pnp.str_obj == NULL) | |
492 | return 0; | |
493 | ||
494 | /* | |
495 | * The _STR object contains a Unicode identifier for a device. | |
496 | * We need to convert to utf-8 so it can be displayed. | |
497 | */ | |
498 | result = utf16s_to_utf8s( | |
499 | (wchar_t *)acpi_dev->pnp.str_obj->buffer.pointer, | |
500 | acpi_dev->pnp.str_obj->buffer.length, | |
501 | UTF16_LITTLE_ENDIAN, buf, | |
502 | PAGE_SIZE); | |
503 | ||
504 | buf[result++] = '\n'; | |
505 | ||
506 | return result; | |
507 | } | |
508 | static DEVICE_ATTR(description, 0444, description_show, NULL); | |
509 | ||
bb74ac23 YI |
510 | static ssize_t |
511 | acpi_device_sun_show(struct device *dev, struct device_attribute *attr, | |
512 | char *buf) { | |
513 | struct acpi_device *acpi_dev = to_acpi_device(dev); | |
514 | ||
515 | return sprintf(buf, "%lu\n", acpi_dev->pnp.sun); | |
516 | } | |
517 | static DEVICE_ATTR(sun, 0444, acpi_device_sun_show, NULL); | |
518 | ||
e49bd2dd | 519 | static int acpi_device_setup_files(struct acpi_device *dev) |
1da177e4 | 520 | { |
d1efe3c3 | 521 | struct acpi_buffer buffer = {ACPI_ALLOCATE_BUFFER, NULL}; |
f883d9db PM |
522 | acpi_status status; |
523 | acpi_handle temp; | |
bb74ac23 | 524 | unsigned long long sun; |
e49bd2dd | 525 | int result = 0; |
1da177e4 LT |
526 | |
527 | /* | |
e49bd2dd | 528 | * Devices gotten from FADT don't have a "path" attribute |
1da177e4 | 529 | */ |
0c526d96 | 530 | if (dev->handle) { |
e49bd2dd | 531 | result = device_create_file(&dev->dev, &dev_attr_path); |
0c526d96 | 532 | if (result) |
e49bd2dd | 533 | goto end; |
1da177e4 LT |
534 | } |
535 | ||
2b2ae7c7 TR |
536 | if (!list_empty(&dev->pnp.ids)) { |
537 | result = device_create_file(&dev->dev, &dev_attr_hid); | |
538 | if (result) | |
539 | goto end; | |
1da177e4 | 540 | |
2b2ae7c7 TR |
541 | result = device_create_file(&dev->dev, &dev_attr_modalias); |
542 | if (result) | |
543 | goto end; | |
544 | } | |
29b71a1c | 545 | |
d1efe3c3 LO |
546 | /* |
547 | * If device has _STR, 'description' file is created | |
548 | */ | |
549 | status = acpi_get_handle(dev->handle, "_STR", &temp); | |
550 | if (ACPI_SUCCESS(status)) { | |
551 | status = acpi_evaluate_object(dev->handle, "_STR", | |
552 | NULL, &buffer); | |
553 | if (ACPI_FAILURE(status)) | |
554 | buffer.pointer = NULL; | |
555 | dev->pnp.str_obj = buffer.pointer; | |
556 | result = device_create_file(&dev->dev, &dev_attr_description); | |
557 | if (result) | |
558 | goto end; | |
559 | } | |
560 | ||
d4e1a692 | 561 | if (dev->pnp.type.bus_address) |
923d4a45 LZ |
562 | result = device_create_file(&dev->dev, &dev_attr_adr); |
563 | if (dev->pnp.unique_id) | |
564 | result = device_create_file(&dev->dev, &dev_attr_uid); | |
565 | ||
bb74ac23 YI |
566 | status = acpi_evaluate_integer(dev->handle, "_SUN", NULL, &sun); |
567 | if (ACPI_SUCCESS(status)) { | |
568 | dev->pnp.sun = (unsigned long)sun; | |
569 | result = device_create_file(&dev->dev, &dev_attr_sun); | |
570 | if (result) | |
571 | goto end; | |
572 | } else { | |
573 | dev->pnp.sun = (unsigned long)-1; | |
574 | } | |
575 | ||
e49bd2dd ZR |
576 | /* |
577 | * If device has _EJ0, 'eject' file is created that is used to trigger | |
578 | * hot-removal function from userland. | |
579 | */ | |
f883d9db | 580 | status = acpi_get_handle(dev->handle, "_EJ0", &temp); |
836aedb1 | 581 | if (ACPI_SUCCESS(status)) { |
e49bd2dd | 582 | result = device_create_file(&dev->dev, &dev_attr_eject); |
836aedb1 RW |
583 | if (result) |
584 | return result; | |
585 | } | |
586 | ||
587 | if (dev->flags.power_manageable) { | |
588 | result = device_create_file(&dev->dev, &dev_attr_power_state); | |
589 | if (result) | |
590 | return result; | |
591 | ||
592 | if (dev->power.flags.power_resources) | |
593 | result = device_create_file(&dev->dev, | |
594 | &dev_attr_real_power_state); | |
595 | } | |
596 | ||
0c526d96 | 597 | end: |
e49bd2dd | 598 | return result; |
1da177e4 LT |
599 | } |
600 | ||
f883d9db | 601 | static void acpi_device_remove_files(struct acpi_device *dev) |
1da177e4 | 602 | { |
f883d9db PM |
603 | acpi_status status; |
604 | acpi_handle temp; | |
1da177e4 | 605 | |
836aedb1 RW |
606 | if (dev->flags.power_manageable) { |
607 | device_remove_file(&dev->dev, &dev_attr_power_state); | |
608 | if (dev->power.flags.power_resources) | |
609 | device_remove_file(&dev->dev, | |
610 | &dev_attr_real_power_state); | |
611 | } | |
612 | ||
f883d9db | 613 | /* |
d1efe3c3 LO |
614 | * If device has _STR, remove 'description' file |
615 | */ | |
616 | status = acpi_get_handle(dev->handle, "_STR", &temp); | |
617 | if (ACPI_SUCCESS(status)) { | |
618 | kfree(dev->pnp.str_obj); | |
619 | device_remove_file(&dev->dev, &dev_attr_description); | |
620 | } | |
621 | /* | |
622 | * If device has _EJ0, remove 'eject' file. | |
f883d9db PM |
623 | */ |
624 | status = acpi_get_handle(dev->handle, "_EJ0", &temp); | |
625 | if (ACPI_SUCCESS(status)) | |
626 | device_remove_file(&dev->dev, &dev_attr_eject); | |
1da177e4 | 627 | |
bb74ac23 YI |
628 | status = acpi_get_handle(dev->handle, "_SUN", &temp); |
629 | if (ACPI_SUCCESS(status)) | |
630 | device_remove_file(&dev->dev, &dev_attr_sun); | |
631 | ||
923d4a45 LZ |
632 | if (dev->pnp.unique_id) |
633 | device_remove_file(&dev->dev, &dev_attr_uid); | |
d4e1a692 | 634 | if (dev->pnp.type.bus_address) |
923d4a45 | 635 | device_remove_file(&dev->dev, &dev_attr_adr); |
1131b938 BH |
636 | device_remove_file(&dev->dev, &dev_attr_modalias); |
637 | device_remove_file(&dev->dev, &dev_attr_hid); | |
0c526d96 | 638 | if (dev->handle) |
e49bd2dd | 639 | device_remove_file(&dev->dev, &dev_attr_path); |
1da177e4 | 640 | } |
1da177e4 | 641 | /* -------------------------------------------------------------------------- |
9e89dde2 | 642 | ACPI Bus operations |
1da177e4 | 643 | -------------------------------------------------------------------------- */ |
29b71a1c | 644 | |
cf761af9 MW |
645 | static const struct acpi_device_id *__acpi_match_device( |
646 | struct acpi_device *device, const struct acpi_device_id *ids) | |
29b71a1c TR |
647 | { |
648 | const struct acpi_device_id *id; | |
7f47fa6c | 649 | struct acpi_hardware_id *hwid; |
29b71a1c | 650 | |
39a0ad87 ZY |
651 | /* |
652 | * If the device is not present, it is unnecessary to load device | |
653 | * driver for it. | |
654 | */ | |
655 | if (!device->status.present) | |
cf761af9 | 656 | return NULL; |
39a0ad87 | 657 | |
7f47fa6c BH |
658 | for (id = ids; id->id[0]; id++) |
659 | list_for_each_entry(hwid, &device->pnp.ids, list) | |
660 | if (!strcmp((char *) id->id, hwid->id)) | |
cf761af9 MW |
661 | return id; |
662 | ||
663 | return NULL; | |
664 | } | |
665 | ||
666 | /** | |
667 | * acpi_match_device - Match a struct device against a given list of ACPI IDs | |
668 | * @ids: Array of struct acpi_device_id object to match against. | |
669 | * @dev: The device structure to match. | |
670 | * | |
671 | * Check if @dev has a valid ACPI handle and if there is a struct acpi_device | |
672 | * object for that handle and use that object to match against a given list of | |
673 | * device IDs. | |
674 | * | |
675 | * Return a pointer to the first matching ID on success or %NULL on failure. | |
676 | */ | |
677 | const struct acpi_device_id *acpi_match_device(const struct acpi_device_id *ids, | |
678 | const struct device *dev) | |
679 | { | |
680 | struct acpi_device *adev; | |
0613e1f7 | 681 | acpi_handle handle = ACPI_HANDLE(dev); |
cf761af9 | 682 | |
0613e1f7 | 683 | if (!ids || !handle || acpi_bus_get_device(handle, &adev)) |
cf761af9 MW |
684 | return NULL; |
685 | ||
686 | return __acpi_match_device(adev, ids); | |
687 | } | |
688 | EXPORT_SYMBOL_GPL(acpi_match_device); | |
29b71a1c | 689 | |
cf761af9 MW |
690 | int acpi_match_device_ids(struct acpi_device *device, |
691 | const struct acpi_device_id *ids) | |
692 | { | |
693 | return __acpi_match_device(device, ids) ? 0 : -ENOENT; | |
29b71a1c TR |
694 | } |
695 | EXPORT_SYMBOL(acpi_match_device_ids); | |
696 | ||
0b224527 RW |
697 | static void acpi_free_power_resources_lists(struct acpi_device *device) |
698 | { | |
699 | int i; | |
700 | ||
993cbe59 RW |
701 | if (device->wakeup.flags.valid) |
702 | acpi_power_resources_list_free(&device->wakeup.resources); | |
703 | ||
0b224527 RW |
704 | if (!device->flags.power_manageable) |
705 | return; | |
706 | ||
707 | for (i = ACPI_STATE_D0; i <= ACPI_STATE_D3_HOT; i++) { | |
708 | struct acpi_device_power_state *ps = &device->power.states[i]; | |
709 | acpi_power_resources_list_free(&ps->resources); | |
710 | } | |
7f47fa6c BH |
711 | } |
712 | ||
1890a97a | 713 | static void acpi_device_release(struct device *dev) |
1da177e4 | 714 | { |
1890a97a | 715 | struct acpi_device *acpi_dev = to_acpi_device(dev); |
1da177e4 | 716 | |
c0af4175 | 717 | acpi_free_pnp_ids(&acpi_dev->pnp); |
0b224527 | 718 | acpi_free_power_resources_lists(acpi_dev); |
1890a97a | 719 | kfree(acpi_dev); |
1da177e4 LT |
720 | } |
721 | ||
5d9464a4 | 722 | static int acpi_bus_match(struct device *dev, struct device_driver *drv) |
9e89dde2 | 723 | { |
5d9464a4 PM |
724 | struct acpi_device *acpi_dev = to_acpi_device(dev); |
725 | struct acpi_driver *acpi_drv = to_acpi_driver(drv); | |
1da177e4 | 726 | |
209d3b17 | 727 | return acpi_dev->flags.match_driver |
805d410f | 728 | && !acpi_match_device_ids(acpi_dev, acpi_drv->ids); |
5d9464a4 | 729 | } |
1da177e4 | 730 | |
7eff2e7a | 731 | static int acpi_device_uevent(struct device *dev, struct kobj_uevent_env *env) |
1da177e4 | 732 | { |
5d9464a4 | 733 | struct acpi_device *acpi_dev = to_acpi_device(dev); |
7eff2e7a | 734 | int len; |
5d9464a4 | 735 | |
2b2ae7c7 TR |
736 | if (list_empty(&acpi_dev->pnp.ids)) |
737 | return 0; | |
738 | ||
7eff2e7a KS |
739 | if (add_uevent_var(env, "MODALIAS=")) |
740 | return -ENOMEM; | |
741 | len = create_modalias(acpi_dev, &env->buf[env->buflen - 1], | |
742 | sizeof(env->buf) - env->buflen); | |
743 | if (len >= (sizeof(env->buf) - env->buflen)) | |
744 | return -ENOMEM; | |
745 | env->buflen += len; | |
9e89dde2 | 746 | return 0; |
1da177e4 LT |
747 | } |
748 | ||
46ec8598 BH |
749 | static void acpi_device_notify(acpi_handle handle, u32 event, void *data) |
750 | { | |
751 | struct acpi_device *device = data; | |
752 | ||
753 | device->driver->ops.notify(device, event); | |
754 | } | |
755 | ||
756 | static acpi_status acpi_device_notify_fixed(void *data) | |
757 | { | |
758 | struct acpi_device *device = data; | |
759 | ||
53de5356 BH |
760 | /* Fixed hardware devices have no handles */ |
761 | acpi_device_notify(NULL, ACPI_FIXED_HARDWARE_EVENT, device); | |
46ec8598 BH |
762 | return AE_OK; |
763 | } | |
764 | ||
765 | static int acpi_device_install_notify_handler(struct acpi_device *device) | |
766 | { | |
767 | acpi_status status; | |
46ec8598 | 768 | |
ccba2a36 | 769 | if (device->device_type == ACPI_BUS_TYPE_POWER_BUTTON) |
46ec8598 BH |
770 | status = |
771 | acpi_install_fixed_event_handler(ACPI_EVENT_POWER_BUTTON, | |
772 | acpi_device_notify_fixed, | |
773 | device); | |
ccba2a36 | 774 | else if (device->device_type == ACPI_BUS_TYPE_SLEEP_BUTTON) |
46ec8598 BH |
775 | status = |
776 | acpi_install_fixed_event_handler(ACPI_EVENT_SLEEP_BUTTON, | |
777 | acpi_device_notify_fixed, | |
778 | device); | |
779 | else | |
780 | status = acpi_install_notify_handler(device->handle, | |
781 | ACPI_DEVICE_NOTIFY, | |
782 | acpi_device_notify, | |
783 | device); | |
784 | ||
785 | if (ACPI_FAILURE(status)) | |
786 | return -EINVAL; | |
787 | return 0; | |
788 | } | |
789 | ||
790 | static void acpi_device_remove_notify_handler(struct acpi_device *device) | |
791 | { | |
ccba2a36 | 792 | if (device->device_type == ACPI_BUS_TYPE_POWER_BUTTON) |
46ec8598 BH |
793 | acpi_remove_fixed_event_handler(ACPI_EVENT_POWER_BUTTON, |
794 | acpi_device_notify_fixed); | |
ccba2a36 | 795 | else if (device->device_type == ACPI_BUS_TYPE_SLEEP_BUTTON) |
46ec8598 BH |
796 | acpi_remove_fixed_event_handler(ACPI_EVENT_SLEEP_BUTTON, |
797 | acpi_device_notify_fixed); | |
798 | else | |
799 | acpi_remove_notify_handler(device->handle, ACPI_DEVICE_NOTIFY, | |
800 | acpi_device_notify); | |
801 | } | |
802 | ||
5d9464a4 | 803 | static int acpi_bus_driver_init(struct acpi_device *, struct acpi_driver *); |
5d9464a4 | 804 | static int acpi_device_probe(struct device * dev) |
1da177e4 | 805 | { |
5d9464a4 PM |
806 | struct acpi_device *acpi_dev = to_acpi_device(dev); |
807 | struct acpi_driver *acpi_drv = to_acpi_driver(dev->driver); | |
808 | int ret; | |
809 | ||
810 | ret = acpi_bus_driver_init(acpi_dev, acpi_drv); | |
811 | if (!ret) { | |
46ec8598 BH |
812 | if (acpi_drv->ops.notify) { |
813 | ret = acpi_device_install_notify_handler(acpi_dev); | |
814 | if (ret) { | |
46ec8598 | 815 | if (acpi_drv->ops.remove) |
51fac838 | 816 | acpi_drv->ops.remove(acpi_dev); |
5f27ee8e TK |
817 | acpi_dev->driver = NULL; |
818 | acpi_dev->driver_data = NULL; | |
46ec8598 BH |
819 | return ret; |
820 | } | |
821 | } | |
822 | ||
5d9464a4 PM |
823 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
824 | "Found driver [%s] for device [%s]\n", | |
825 | acpi_drv->name, acpi_dev->pnp.bus_id)); | |
826 | get_device(dev); | |
827 | } | |
828 | return ret; | |
829 | } | |
1da177e4 | 830 | |
5d9464a4 PM |
831 | static int acpi_device_remove(struct device * dev) |
832 | { | |
833 | struct acpi_device *acpi_dev = to_acpi_device(dev); | |
834 | struct acpi_driver *acpi_drv = acpi_dev->driver; | |
835 | ||
836 | if (acpi_drv) { | |
46ec8598 BH |
837 | if (acpi_drv->ops.notify) |
838 | acpi_device_remove_notify_handler(acpi_dev); | |
5d9464a4 | 839 | if (acpi_drv->ops.remove) |
51fac838 | 840 | acpi_drv->ops.remove(acpi_dev); |
1da177e4 | 841 | } |
5d9464a4 | 842 | acpi_dev->driver = NULL; |
db89b4f0 | 843 | acpi_dev->driver_data = NULL; |
1da177e4 | 844 | |
5d9464a4 | 845 | put_device(dev); |
9e89dde2 ZR |
846 | return 0; |
847 | } | |
1da177e4 | 848 | |
55955aad | 849 | struct bus_type acpi_bus_type = { |
9e89dde2 | 850 | .name = "acpi", |
5d9464a4 PM |
851 | .match = acpi_bus_match, |
852 | .probe = acpi_device_probe, | |
853 | .remove = acpi_device_remove, | |
854 | .uevent = acpi_device_uevent, | |
9e89dde2 ZR |
855 | }; |
856 | ||
cf860be6 RW |
857 | int acpi_device_add(struct acpi_device *device, |
858 | void (*release)(struct device *)) | |
1da177e4 | 859 | { |
4be44fcd | 860 | int result; |
e49bd2dd ZR |
861 | struct acpi_device_bus_id *acpi_device_bus_id, *new_bus_id; |
862 | int found = 0; | |
66b7ed40 | 863 | |
d43e167d RW |
864 | if (device->handle) { |
865 | acpi_status status; | |
866 | ||
867 | status = acpi_attach_data(device->handle, acpi_bus_data_handler, | |
868 | device); | |
869 | if (ACPI_FAILURE(status)) { | |
870 | acpi_handle_err(device->handle, | |
871 | "Unable to attach device data\n"); | |
872 | return -ENODEV; | |
873 | } | |
874 | } | |
875 | ||
9e89dde2 ZR |
876 | /* |
877 | * Linkage | |
878 | * ------- | |
879 | * Link this device to its parent and siblings. | |
880 | */ | |
881 | INIT_LIST_HEAD(&device->children); | |
882 | INIT_LIST_HEAD(&device->node); | |
9e89dde2 | 883 | INIT_LIST_HEAD(&device->wakeup_list); |
1033f904 LT |
884 | INIT_LIST_HEAD(&device->physical_node_list); |
885 | mutex_init(&device->physical_node_lock); | |
bc9b6407 | 886 | INIT_LIST_HEAD(&device->power_dependent); |
1da177e4 | 887 | |
e49bd2dd ZR |
888 | new_bus_id = kzalloc(sizeof(struct acpi_device_bus_id), GFP_KERNEL); |
889 | if (!new_bus_id) { | |
d43e167d RW |
890 | pr_err(PREFIX "Memory allocation error\n"); |
891 | result = -ENOMEM; | |
892 | goto err_detach; | |
1da177e4 | 893 | } |
e49bd2dd | 894 | |
9090589d | 895 | mutex_lock(&acpi_device_lock); |
e49bd2dd ZR |
896 | /* |
897 | * Find suitable bus_id and instance number in acpi_bus_id_list | |
898 | * If failed, create one and link it into acpi_bus_id_list | |
899 | */ | |
900 | list_for_each_entry(acpi_device_bus_id, &acpi_bus_id_list, node) { | |
1131b938 BH |
901 | if (!strcmp(acpi_device_bus_id->bus_id, |
902 | acpi_device_hid(device))) { | |
903 | acpi_device_bus_id->instance_no++; | |
e49bd2dd ZR |
904 | found = 1; |
905 | kfree(new_bus_id); | |
906 | break; | |
907 | } | |
1da177e4 | 908 | } |
0c526d96 | 909 | if (!found) { |
e49bd2dd | 910 | acpi_device_bus_id = new_bus_id; |
1131b938 | 911 | strcpy(acpi_device_bus_id->bus_id, acpi_device_hid(device)); |
e49bd2dd ZR |
912 | acpi_device_bus_id->instance_no = 0; |
913 | list_add_tail(&acpi_device_bus_id->node, &acpi_bus_id_list); | |
1da177e4 | 914 | } |
0794469d | 915 | dev_set_name(&device->dev, "%s:%02x", acpi_device_bus_id->bus_id, acpi_device_bus_id->instance_no); |
1da177e4 | 916 | |
33b57150 | 917 | if (device->parent) |
9e89dde2 | 918 | list_add_tail(&device->node, &device->parent->children); |
33b57150 | 919 | |
9e89dde2 ZR |
920 | if (device->wakeup.flags.valid) |
921 | list_add_tail(&device->wakeup_list, &acpi_wakeup_device_list); | |
9090589d | 922 | mutex_unlock(&acpi_device_lock); |
1da177e4 | 923 | |
1890a97a | 924 | if (device->parent) |
66b7ed40 | 925 | device->dev.parent = &device->parent->dev; |
1890a97a | 926 | device->dev.bus = &acpi_bus_type; |
82c7d5ef | 927 | device->dev.release = release; |
cf860be6 | 928 | result = device_add(&device->dev); |
0c526d96 | 929 | if (result) { |
8b12b922 | 930 | dev_err(&device->dev, "Error registering device\n"); |
d43e167d | 931 | goto err; |
1da177e4 | 932 | } |
1da177e4 | 933 | |
e49bd2dd | 934 | result = acpi_device_setup_files(device); |
0c526d96 | 935 | if (result) |
0794469d KS |
936 | printk(KERN_ERR PREFIX "Error creating sysfs interface for device %s\n", |
937 | dev_name(&device->dev)); | |
1da177e4 | 938 | |
96333578 | 939 | device->removal_type = ACPI_BUS_REMOVAL_NORMAL; |
1da177e4 | 940 | return 0; |
d43e167d RW |
941 | |
942 | err: | |
9090589d | 943 | mutex_lock(&acpi_device_lock); |
33b57150 | 944 | if (device->parent) |
e49bd2dd | 945 | list_del(&device->node); |
e49bd2dd | 946 | list_del(&device->wakeup_list); |
9090589d | 947 | mutex_unlock(&acpi_device_lock); |
d43e167d RW |
948 | |
949 | err_detach: | |
950 | acpi_detach_data(device->handle, acpi_bus_data_handler); | |
e49bd2dd | 951 | return result; |
1da177e4 LT |
952 | } |
953 | ||
b17b537a | 954 | static void acpi_device_unregister(struct acpi_device *device) |
9e89dde2 | 955 | { |
9090589d | 956 | mutex_lock(&acpi_device_lock); |
33b57150 | 957 | if (device->parent) |
9e89dde2 | 958 | list_del(&device->node); |
1da177e4 | 959 | |
9e89dde2 | 960 | list_del(&device->wakeup_list); |
9090589d | 961 | mutex_unlock(&acpi_device_lock); |
1da177e4 | 962 | |
9e89dde2 | 963 | acpi_detach_data(device->handle, acpi_bus_data_handler); |
1890a97a | 964 | |
bc9b6407 | 965 | acpi_power_add_remove_device(device, false); |
f883d9db | 966 | acpi_device_remove_files(device); |
b1c0f99b RW |
967 | if (device->remove) |
968 | device->remove(device); | |
969 | ||
cf860be6 | 970 | device_del(&device->dev); |
bc9b6407 | 971 | /* |
0aa120a0 RW |
972 | * Transition the device to D3cold to drop the reference counts of all |
973 | * power resources the device depends on and turn off the ones that have | |
974 | * no more references. | |
bc9b6407 | 975 | */ |
0aa120a0 | 976 | acpi_device_set_power(device, ACPI_STATE_D3_COLD); |
3757b948 | 977 | device->handle = NULL; |
cf860be6 | 978 | put_device(&device->dev); |
1da177e4 LT |
979 | } |
980 | ||
9e89dde2 ZR |
981 | /* -------------------------------------------------------------------------- |
982 | Driver Management | |
983 | -------------------------------------------------------------------------- */ | |
1da177e4 | 984 | /** |
d758a8fa RD |
985 | * acpi_bus_driver_init - add a device to a driver |
986 | * @device: the device to add and initialize | |
987 | * @driver: driver for the device | |
988 | * | |
0c526d96 | 989 | * Used to initialize a device via its device driver. Called whenever a |
1890a97a | 990 | * driver is bound to a device. Invokes the driver's add() ops. |
1da177e4 LT |
991 | */ |
992 | static int | |
4be44fcd | 993 | acpi_bus_driver_init(struct acpi_device *device, struct acpi_driver *driver) |
1da177e4 | 994 | { |
4be44fcd | 995 | int result = 0; |
1da177e4 | 996 | |
1da177e4 | 997 | if (!device || !driver) |
d550d98d | 998 | return -EINVAL; |
1da177e4 LT |
999 | |
1000 | if (!driver->ops.add) | |
d550d98d | 1001 | return -ENOSYS; |
1da177e4 LT |
1002 | |
1003 | result = driver->ops.add(device); | |
1004 | if (result) { | |
1005 | device->driver = NULL; | |
db89b4f0 | 1006 | device->driver_data = NULL; |
d550d98d | 1007 | return result; |
1da177e4 LT |
1008 | } |
1009 | ||
1010 | device->driver = driver; | |
1011 | ||
1012 | /* | |
1013 | * TBD - Configuration Management: Assign resources to device based | |
1014 | * upon possible configuration and currently allocated resources. | |
1015 | */ | |
1016 | ||
4be44fcd LB |
1017 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
1018 | "Driver successfully bound to device\n")); | |
d550d98d | 1019 | return 0; |
3fb02738 RS |
1020 | } |
1021 | ||
9e89dde2 ZR |
1022 | /** |
1023 | * acpi_bus_register_driver - register a driver with the ACPI bus | |
1024 | * @driver: driver being registered | |
1025 | * | |
1026 | * Registers a driver with the ACPI bus. Searches the namespace for all | |
1027 | * devices that match the driver's criteria and binds. Returns zero for | |
1028 | * success or a negative error status for failure. | |
1029 | */ | |
1030 | int acpi_bus_register_driver(struct acpi_driver *driver) | |
1da177e4 | 1031 | { |
1890a97a | 1032 | int ret; |
1da177e4 | 1033 | |
9e89dde2 ZR |
1034 | if (acpi_disabled) |
1035 | return -ENODEV; | |
1890a97a PM |
1036 | driver->drv.name = driver->name; |
1037 | driver->drv.bus = &acpi_bus_type; | |
1038 | driver->drv.owner = driver->owner; | |
1da177e4 | 1039 | |
1890a97a PM |
1040 | ret = driver_register(&driver->drv); |
1041 | return ret; | |
9e89dde2 | 1042 | } |
1da177e4 | 1043 | |
9e89dde2 ZR |
1044 | EXPORT_SYMBOL(acpi_bus_register_driver); |
1045 | ||
1046 | /** | |
1047 | * acpi_bus_unregister_driver - unregisters a driver with the APIC bus | |
1048 | * @driver: driver to unregister | |
1049 | * | |
1050 | * Unregisters a driver with the ACPI bus. Searches the namespace for all | |
1051 | * devices that match the driver's criteria and unbinds. | |
1052 | */ | |
1053 | void acpi_bus_unregister_driver(struct acpi_driver *driver) | |
1054 | { | |
1890a97a | 1055 | driver_unregister(&driver->drv); |
9e89dde2 ZR |
1056 | } |
1057 | ||
1058 | EXPORT_SYMBOL(acpi_bus_unregister_driver); | |
1059 | ||
9e89dde2 ZR |
1060 | /* -------------------------------------------------------------------------- |
1061 | Device Enumeration | |
1062 | -------------------------------------------------------------------------- */ | |
5c478f49 BH |
1063 | static struct acpi_device *acpi_bus_get_parent(acpi_handle handle) |
1064 | { | |
456de893 | 1065 | struct acpi_device *device = NULL; |
5c478f49 | 1066 | acpi_status status; |
5c478f49 BH |
1067 | |
1068 | /* | |
1069 | * Fixed hardware devices do not appear in the namespace and do not | |
1070 | * have handles, but we fabricate acpi_devices for them, so we have | |
1071 | * to deal with them specially. | |
1072 | */ | |
456de893 | 1073 | if (!handle) |
5c478f49 BH |
1074 | return acpi_root; |
1075 | ||
1076 | do { | |
1077 | status = acpi_get_parent(handle, &handle); | |
5c478f49 | 1078 | if (ACPI_FAILURE(status)) |
456de893 RW |
1079 | return status == AE_NULL_ENTRY ? NULL : acpi_root; |
1080 | } while (acpi_bus_get_device(handle, &device)); | |
1081 | return device; | |
5c478f49 BH |
1082 | } |
1083 | ||
9e89dde2 ZR |
1084 | acpi_status |
1085 | acpi_bus_get_ejd(acpi_handle handle, acpi_handle *ejd) | |
1086 | { | |
1087 | acpi_status status; | |
1088 | acpi_handle tmp; | |
1089 | struct acpi_buffer buffer = {ACPI_ALLOCATE_BUFFER, NULL}; | |
1090 | union acpi_object *obj; | |
1091 | ||
1092 | status = acpi_get_handle(handle, "_EJD", &tmp); | |
1093 | if (ACPI_FAILURE(status)) | |
1094 | return status; | |
1095 | ||
1096 | status = acpi_evaluate_object(handle, "_EJD", NULL, &buffer); | |
1097 | if (ACPI_SUCCESS(status)) { | |
1098 | obj = buffer.pointer; | |
3b5fee59 HM |
1099 | status = acpi_get_handle(ACPI_ROOT_OBJECT, obj->string.pointer, |
1100 | ejd); | |
9e89dde2 ZR |
1101 | kfree(buffer.pointer); |
1102 | } | |
1103 | return status; | |
1104 | } | |
1105 | EXPORT_SYMBOL_GPL(acpi_bus_get_ejd); | |
1106 | ||
8e4319c4 | 1107 | void acpi_bus_data_handler(acpi_handle handle, void *context) |
9e89dde2 ZR |
1108 | { |
1109 | ||
1110 | /* TBD */ | |
1111 | ||
1112 | return; | |
1113 | } | |
1114 | ||
e88c9c60 RW |
1115 | static int acpi_bus_extract_wakeup_device_power_package(acpi_handle handle, |
1116 | struct acpi_device_wakeup *wakeup) | |
9e89dde2 | 1117 | { |
b581a7f9 RW |
1118 | struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; |
1119 | union acpi_object *package = NULL; | |
9e89dde2 | 1120 | union acpi_object *element = NULL; |
b581a7f9 | 1121 | acpi_status status; |
e88c9c60 | 1122 | int err = -ENODATA; |
9e89dde2 | 1123 | |
b581a7f9 | 1124 | if (!wakeup) |
e88c9c60 | 1125 | return -EINVAL; |
9e89dde2 | 1126 | |
993cbe59 | 1127 | INIT_LIST_HEAD(&wakeup->resources); |
9e89dde2 | 1128 | |
b581a7f9 RW |
1129 | /* _PRW */ |
1130 | status = acpi_evaluate_object(handle, "_PRW", NULL, &buffer); | |
1131 | if (ACPI_FAILURE(status)) { | |
1132 | ACPI_EXCEPTION((AE_INFO, status, "Evaluating _PRW")); | |
e88c9c60 | 1133 | return err; |
b581a7f9 RW |
1134 | } |
1135 | ||
1136 | package = (union acpi_object *)buffer.pointer; | |
1137 | ||
e88c9c60 | 1138 | if (!package || package->package.count < 2) |
b581a7f9 | 1139 | goto out; |
b581a7f9 | 1140 | |
9e89dde2 | 1141 | element = &(package->package.elements[0]); |
e88c9c60 | 1142 | if (!element) |
b581a7f9 | 1143 | goto out; |
e88c9c60 | 1144 | |
9e89dde2 ZR |
1145 | if (element->type == ACPI_TYPE_PACKAGE) { |
1146 | if ((element->package.count < 2) || | |
1147 | (element->package.elements[0].type != | |
1148 | ACPI_TYPE_LOCAL_REFERENCE) | |
e88c9c60 | 1149 | || (element->package.elements[1].type != ACPI_TYPE_INTEGER)) |
b581a7f9 | 1150 | goto out; |
e88c9c60 | 1151 | |
b581a7f9 | 1152 | wakeup->gpe_device = |
9e89dde2 | 1153 | element->package.elements[0].reference.handle; |
b581a7f9 | 1154 | wakeup->gpe_number = |
9e89dde2 ZR |
1155 | (u32) element->package.elements[1].integer.value; |
1156 | } else if (element->type == ACPI_TYPE_INTEGER) { | |
b581a7f9 RW |
1157 | wakeup->gpe_device = NULL; |
1158 | wakeup->gpe_number = element->integer.value; | |
1159 | } else { | |
b581a7f9 RW |
1160 | goto out; |
1161 | } | |
9e89dde2 ZR |
1162 | |
1163 | element = &(package->package.elements[1]); | |
e88c9c60 | 1164 | if (element->type != ACPI_TYPE_INTEGER) |
b581a7f9 | 1165 | goto out; |
e88c9c60 | 1166 | |
b581a7f9 | 1167 | wakeup->sleep_state = element->integer.value; |
9e89dde2 | 1168 | |
e88c9c60 RW |
1169 | err = acpi_extract_power_resources(package, 2, &wakeup->resources); |
1170 | if (err) | |
b581a7f9 | 1171 | goto out; |
9e89dde2 | 1172 | |
0596a52b RW |
1173 | if (!list_empty(&wakeup->resources)) { |
1174 | int sleep_state; | |
9e89dde2 | 1175 | |
b5d667eb RW |
1176 | err = acpi_power_wakeup_list_init(&wakeup->resources, |
1177 | &sleep_state); | |
1178 | if (err) { | |
1179 | acpi_handle_warn(handle, "Retrieving current states " | |
1180 | "of wakeup power resources failed\n"); | |
1181 | acpi_power_resources_list_free(&wakeup->resources); | |
1182 | goto out; | |
1183 | } | |
0596a52b RW |
1184 | if (sleep_state < wakeup->sleep_state) { |
1185 | acpi_handle_warn(handle, "Overriding _PRW sleep state " | |
1186 | "(S%d) by S%d from power resources\n", | |
1187 | (int)wakeup->sleep_state, sleep_state); | |
1188 | wakeup->sleep_state = sleep_state; | |
1189 | } | |
1190 | } | |
bba63a29 | 1191 | acpi_setup_gpe_for_wake(handle, wakeup->gpe_device, wakeup->gpe_number); |
9874647b | 1192 | |
b581a7f9 RW |
1193 | out: |
1194 | kfree(buffer.pointer); | |
e88c9c60 | 1195 | return err; |
1da177e4 LT |
1196 | } |
1197 | ||
f517709d | 1198 | static void acpi_bus_set_run_wake_flags(struct acpi_device *device) |
1da177e4 | 1199 | { |
29b71a1c | 1200 | struct acpi_device_id button_device_ids[] = { |
29b71a1c | 1201 | {"PNP0C0C", 0}, |
b7e38304 | 1202 | {"PNP0C0D", 0}, |
29b71a1c TR |
1203 | {"PNP0C0E", 0}, |
1204 | {"", 0}, | |
1205 | }; | |
f517709d RW |
1206 | acpi_status status; |
1207 | acpi_event_status event_status; | |
1208 | ||
b67ea761 | 1209 | device->wakeup.flags.notifier_present = 0; |
f517709d RW |
1210 | |
1211 | /* Power button, Lid switch always enable wakeup */ | |
1212 | if (!acpi_match_device_ids(device, button_device_ids)) { | |
1213 | device->wakeup.flags.run_wake = 1; | |
b7e38304 ZR |
1214 | if (!acpi_match_device_ids(device, &button_device_ids[1])) { |
1215 | /* Do not use Lid/sleep button for S5 wakeup */ | |
1216 | if (device->wakeup.sleep_state == ACPI_STATE_S5) | |
1217 | device->wakeup.sleep_state = ACPI_STATE_S4; | |
1218 | } | |
f2b56bc8 | 1219 | device_set_wakeup_capable(&device->dev, true); |
f517709d RW |
1220 | return; |
1221 | } | |
1222 | ||
e8e18c95 RW |
1223 | status = acpi_get_gpe_status(device->wakeup.gpe_device, |
1224 | device->wakeup.gpe_number, | |
1225 | &event_status); | |
f517709d RW |
1226 | if (status == AE_OK) |
1227 | device->wakeup.flags.run_wake = | |
1228 | !!(event_status & ACPI_EVENT_FLAG_HANDLE); | |
1229 | } | |
1230 | ||
d57d09a4 | 1231 | static void acpi_bus_get_wakeup_device_flags(struct acpi_device *device) |
f517709d | 1232 | { |
d57d09a4 | 1233 | acpi_handle temp; |
f517709d | 1234 | acpi_status status = 0; |
e88c9c60 | 1235 | int err; |
29b71a1c | 1236 | |
d57d09a4 RW |
1237 | /* Presence of _PRW indicates wake capable */ |
1238 | status = acpi_get_handle(device->handle, "_PRW", &temp); | |
1239 | if (ACPI_FAILURE(status)) | |
1240 | return; | |
1241 | ||
e88c9c60 RW |
1242 | err = acpi_bus_extract_wakeup_device_power_package(device->handle, |
1243 | &device->wakeup); | |
1244 | if (err) { | |
1245 | dev_err(&device->dev, "_PRW evaluation error: %d\n", err); | |
d57d09a4 | 1246 | return; |
9e89dde2 | 1247 | } |
1da177e4 | 1248 | |
9e89dde2 | 1249 | device->wakeup.flags.valid = 1; |
9b83ccd2 | 1250 | device->wakeup.prepare_count = 0; |
f517709d | 1251 | acpi_bus_set_run_wake_flags(device); |
729b2bdb ZY |
1252 | /* Call _PSW/_DSW object to disable its ability to wake the sleeping |
1253 | * system for the ACPI device with the _PRW object. | |
1254 | * The _PSW object is depreciated in ACPI 3.0 and is replaced by _DSW. | |
1255 | * So it is necessary to call _DSW object first. Only when it is not | |
1256 | * present will the _PSW object used. | |
1257 | */ | |
e88c9c60 RW |
1258 | err = acpi_device_sleep_wake(device, 0, 0, 0); |
1259 | if (err) | |
77e76609 RW |
1260 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
1261 | "error in _DSW or _PSW evaluation\n")); | |
1da177e4 | 1262 | } |
1da177e4 | 1263 | |
f33ce568 RW |
1264 | static void acpi_bus_init_power_state(struct acpi_device *device, int state) |
1265 | { | |
1266 | struct acpi_device_power_state *ps = &device->power.states[state]; | |
ef85bdbe RW |
1267 | char pathname[5] = { '_', 'P', 'R', '0' + state, '\0' }; |
1268 | struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; | |
f33ce568 RW |
1269 | acpi_handle handle; |
1270 | acpi_status status; | |
bf325f95 | 1271 | |
f33ce568 RW |
1272 | INIT_LIST_HEAD(&ps->resources); |
1273 | ||
ef85bdbe RW |
1274 | /* Evaluate "_PRx" to get referenced power resources */ |
1275 | status = acpi_evaluate_object(device->handle, pathname, NULL, &buffer); | |
1276 | if (ACPI_SUCCESS(status)) { | |
1277 | union acpi_object *package = buffer.pointer; | |
1278 | ||
1279 | if (buffer.length && package | |
1280 | && package->type == ACPI_TYPE_PACKAGE | |
1281 | && package->package.count) { | |
e88c9c60 RW |
1282 | int err = acpi_extract_power_resources(package, 0, |
1283 | &ps->resources); | |
1284 | if (!err) | |
ef85bdbe | 1285 | device->power.flags.power_resources = 1; |
f33ce568 | 1286 | } |
ef85bdbe | 1287 | ACPI_FREE(buffer.pointer); |
f33ce568 RW |
1288 | } |
1289 | ||
1290 | /* Evaluate "_PSx" to see if we can do explicit sets */ | |
ef85bdbe RW |
1291 | pathname[2] = 'S'; |
1292 | status = acpi_get_handle(device->handle, pathname, &handle); | |
f33ce568 RW |
1293 | if (ACPI_SUCCESS(status)) |
1294 | ps->flags.explicit_set = 1; | |
1295 | ||
1296 | /* | |
1297 | * State is valid if there are means to put the device into it. | |
1298 | * D3hot is only valid if _PR3 present. | |
1299 | */ | |
ef85bdbe | 1300 | if (!list_empty(&ps->resources) |
f33ce568 RW |
1301 | || (ps->flags.explicit_set && state < ACPI_STATE_D3_HOT)) { |
1302 | ps->flags.valid = 1; | |
1303 | ps->flags.os_accessible = 1; | |
1304 | } | |
1305 | ||
1306 | ps->power = -1; /* Unknown - driver assigned */ | |
1307 | ps->latency = -1; /* Unknown - driver assigned */ | |
1308 | } | |
1309 | ||
d43e167d | 1310 | static void acpi_bus_get_power_flags(struct acpi_device *device) |
1da177e4 | 1311 | { |
8bc5053b RW |
1312 | acpi_status status; |
1313 | acpi_handle handle; | |
1314 | u32 i; | |
1a365616 | 1315 | |
d43e167d RW |
1316 | /* Presence of _PS0|_PR0 indicates 'power manageable' */ |
1317 | status = acpi_get_handle(device->handle, "_PS0", &handle); | |
1318 | if (ACPI_FAILURE(status)) { | |
1319 | status = acpi_get_handle(device->handle, "_PR0", &handle); | |
1320 | if (ACPI_FAILURE(status)) | |
1321 | return; | |
1322 | } | |
1a365616 | 1323 | |
d43e167d | 1324 | device->flags.power_manageable = 1; |
4be44fcd | 1325 | |
9e89dde2 ZR |
1326 | /* |
1327 | * Power Management Flags | |
1328 | */ | |
1329 | status = acpi_get_handle(device->handle, "_PSC", &handle); | |
1330 | if (ACPI_SUCCESS(status)) | |
1331 | device->power.flags.explicit_get = 1; | |
1332 | status = acpi_get_handle(device->handle, "_IRC", &handle); | |
1333 | if (ACPI_SUCCESS(status)) | |
1334 | device->power.flags.inrush_current = 1; | |
1da177e4 | 1335 | |
9e89dde2 ZR |
1336 | /* |
1337 | * Enumerate supported power management states | |
1338 | */ | |
f33ce568 RW |
1339 | for (i = ACPI_STATE_D0; i <= ACPI_STATE_D3_HOT; i++) |
1340 | acpi_bus_init_power_state(device, i); | |
bf325f95 | 1341 | |
0b224527 | 1342 | INIT_LIST_HEAD(&device->power.states[ACPI_STATE_D3_COLD].resources); |
1da177e4 | 1343 | |
9e89dde2 ZR |
1344 | /* Set defaults for D0 and D3 states (always valid) */ |
1345 | device->power.states[ACPI_STATE_D0].flags.valid = 1; | |
1346 | device->power.states[ACPI_STATE_D0].power = 100; | |
1347 | device->power.states[ACPI_STATE_D3].flags.valid = 1; | |
1348 | device->power.states[ACPI_STATE_D3].power = 0; | |
c8f7a62c | 1349 | |
5c7dd710 RW |
1350 | /* Set D3cold's explicit_set flag if _PS3 exists. */ |
1351 | if (device->power.states[ACPI_STATE_D3_HOT].flags.explicit_set) | |
1352 | device->power.states[ACPI_STATE_D3_COLD].flags.explicit_set = 1; | |
1353 | ||
1399dfcd AL |
1354 | /* Presence of _PS3 or _PRx means we can put the device into D3 cold */ |
1355 | if (device->power.states[ACPI_STATE_D3_HOT].flags.explicit_set || | |
1356 | device->power.flags.power_resources) | |
1357 | device->power.states[ACPI_STATE_D3_COLD].flags.os_accessible = 1; | |
1358 | ||
b3785492 RW |
1359 | if (acpi_bus_init_power(device)) { |
1360 | acpi_free_power_resources_lists(device); | |
1361 | device->flags.power_manageable = 0; | |
1362 | } | |
9e89dde2 | 1363 | } |
c8f7a62c | 1364 | |
d43e167d | 1365 | static void acpi_bus_get_flags(struct acpi_device *device) |
1da177e4 | 1366 | { |
4be44fcd LB |
1367 | acpi_status status = AE_OK; |
1368 | acpi_handle temp = NULL; | |
1da177e4 | 1369 | |
1da177e4 LT |
1370 | /* Presence of _STA indicates 'dynamic_status' */ |
1371 | status = acpi_get_handle(device->handle, "_STA", &temp); | |
1372 | if (ACPI_SUCCESS(status)) | |
1373 | device->flags.dynamic_status = 1; | |
1374 | ||
1da177e4 LT |
1375 | /* Presence of _RMV indicates 'removable' */ |
1376 | status = acpi_get_handle(device->handle, "_RMV", &temp); | |
1377 | if (ACPI_SUCCESS(status)) | |
1378 | device->flags.removable = 1; | |
1379 | ||
1380 | /* Presence of _EJD|_EJ0 indicates 'ejectable' */ | |
1381 | status = acpi_get_handle(device->handle, "_EJD", &temp); | |
1382 | if (ACPI_SUCCESS(status)) | |
1383 | device->flags.ejectable = 1; | |
1384 | else { | |
1385 | status = acpi_get_handle(device->handle, "_EJ0", &temp); | |
1386 | if (ACPI_SUCCESS(status)) | |
1387 | device->flags.ejectable = 1; | |
1388 | } | |
1da177e4 LT |
1389 | } |
1390 | ||
c7bcb4e9 | 1391 | static void acpi_device_get_busid(struct acpi_device *device) |
1da177e4 | 1392 | { |
4be44fcd LB |
1393 | char bus_id[5] = { '?', 0 }; |
1394 | struct acpi_buffer buffer = { sizeof(bus_id), bus_id }; | |
1395 | int i = 0; | |
1da177e4 LT |
1396 | |
1397 | /* | |
1398 | * Bus ID | |
1399 | * ------ | |
1400 | * The device's Bus ID is simply the object name. | |
1401 | * TBD: Shouldn't this value be unique (within the ACPI namespace)? | |
1402 | */ | |
859ac9a4 | 1403 | if (ACPI_IS_ROOT_DEVICE(device)) { |
1da177e4 | 1404 | strcpy(device->pnp.bus_id, "ACPI"); |
859ac9a4 BH |
1405 | return; |
1406 | } | |
1407 | ||
1408 | switch (device->device_type) { | |
1da177e4 LT |
1409 | case ACPI_BUS_TYPE_POWER_BUTTON: |
1410 | strcpy(device->pnp.bus_id, "PWRF"); | |
1411 | break; | |
1412 | case ACPI_BUS_TYPE_SLEEP_BUTTON: | |
1413 | strcpy(device->pnp.bus_id, "SLPF"); | |
1414 | break; | |
1415 | default: | |
66b7ed40 | 1416 | acpi_get_name(device->handle, ACPI_SINGLE_NAME, &buffer); |
1da177e4 LT |
1417 | /* Clean up trailing underscores (if any) */ |
1418 | for (i = 3; i > 1; i--) { | |
1419 | if (bus_id[i] == '_') | |
1420 | bus_id[i] = '\0'; | |
1421 | else | |
1422 | break; | |
1423 | } | |
1424 | strcpy(device->pnp.bus_id, bus_id); | |
1425 | break; | |
1426 | } | |
1427 | } | |
1428 | ||
54735266 | 1429 | /* |
d4e1a692 | 1430 | * acpi_bay_match - see if an acpi object is an ejectable driver bay |
54735266 ZR |
1431 | * |
1432 | * If an acpi object is ejectable and has one of the ACPI ATA methods defined, | |
1433 | * then we can safely call it an ejectable drive bay | |
1434 | */ | |
d4e1a692 TK |
1435 | static int acpi_bay_match(acpi_handle handle) |
1436 | { | |
54735266 | 1437 | acpi_status status; |
54735266 ZR |
1438 | acpi_handle tmp; |
1439 | acpi_handle phandle; | |
1440 | ||
54735266 ZR |
1441 | status = acpi_get_handle(handle, "_EJ0", &tmp); |
1442 | if (ACPI_FAILURE(status)) | |
1443 | return -ENODEV; | |
1444 | ||
1445 | if ((ACPI_SUCCESS(acpi_get_handle(handle, "_GTF", &tmp))) || | |
1446 | (ACPI_SUCCESS(acpi_get_handle(handle, "_GTM", &tmp))) || | |
1447 | (ACPI_SUCCESS(acpi_get_handle(handle, "_STM", &tmp))) || | |
1448 | (ACPI_SUCCESS(acpi_get_handle(handle, "_SDD", &tmp)))) | |
1449 | return 0; | |
1450 | ||
1451 | if (acpi_get_parent(handle, &phandle)) | |
1452 | return -ENODEV; | |
1453 | ||
1454 | if ((ACPI_SUCCESS(acpi_get_handle(phandle, "_GTF", &tmp))) || | |
1455 | (ACPI_SUCCESS(acpi_get_handle(phandle, "_GTM", &tmp))) || | |
1456 | (ACPI_SUCCESS(acpi_get_handle(phandle, "_STM", &tmp))) || | |
1457 | (ACPI_SUCCESS(acpi_get_handle(phandle, "_SDD", &tmp)))) | |
1458 | return 0; | |
1459 | ||
1460 | return -ENODEV; | |
1461 | } | |
1462 | ||
3620f2f2 | 1463 | /* |
d4e1a692 | 1464 | * acpi_dock_match - see if an acpi object has a _DCK method |
3620f2f2 | 1465 | */ |
d4e1a692 | 1466 | static int acpi_dock_match(acpi_handle handle) |
3620f2f2 FS |
1467 | { |
1468 | acpi_handle tmp; | |
d4e1a692 | 1469 | return acpi_get_handle(handle, "_DCK", &tmp); |
3620f2f2 FS |
1470 | } |
1471 | ||
620e112c | 1472 | const char *acpi_device_hid(struct acpi_device *device) |
15b8dd53 | 1473 | { |
7f47fa6c | 1474 | struct acpi_hardware_id *hid; |
15b8dd53 | 1475 | |
2b2ae7c7 TR |
1476 | if (list_empty(&device->pnp.ids)) |
1477 | return dummy_hid; | |
1478 | ||
7f47fa6c BH |
1479 | hid = list_first_entry(&device->pnp.ids, struct acpi_hardware_id, list); |
1480 | return hid->id; | |
1481 | } | |
1482 | EXPORT_SYMBOL(acpi_device_hid); | |
15b8dd53 | 1483 | |
d4e1a692 | 1484 | static void acpi_add_id(struct acpi_device_pnp *pnp, const char *dev_id) |
7f47fa6c BH |
1485 | { |
1486 | struct acpi_hardware_id *id; | |
15b8dd53 | 1487 | |
7f47fa6c BH |
1488 | id = kmalloc(sizeof(*id), GFP_KERNEL); |
1489 | if (!id) | |
1490 | return; | |
15b8dd53 | 1491 | |
581de59e | 1492 | id->id = kstrdup(dev_id, GFP_KERNEL); |
7f47fa6c BH |
1493 | if (!id->id) { |
1494 | kfree(id); | |
1495 | return; | |
15b8dd53 BM |
1496 | } |
1497 | ||
d4e1a692 TK |
1498 | list_add_tail(&id->list, &pnp->ids); |
1499 | pnp->type.hardware_id = 1; | |
15b8dd53 BM |
1500 | } |
1501 | ||
222e82ac DW |
1502 | /* |
1503 | * Old IBM workstations have a DSDT bug wherein the SMBus object | |
1504 | * lacks the SMBUS01 HID and the methods do not have the necessary "_" | |
1505 | * prefix. Work around this. | |
1506 | */ | |
d4e1a692 | 1507 | static int acpi_ibm_smbus_match(acpi_handle handle) |
222e82ac DW |
1508 | { |
1509 | acpi_handle h_dummy; | |
1510 | struct acpi_buffer path = {ACPI_ALLOCATE_BUFFER, NULL}; | |
1511 | int result; | |
1512 | ||
1513 | if (!dmi_name_in_vendors("IBM")) | |
1514 | return -ENODEV; | |
1515 | ||
1516 | /* Look for SMBS object */ | |
d4e1a692 | 1517 | result = acpi_get_name(handle, ACPI_SINGLE_NAME, &path); |
222e82ac DW |
1518 | if (result) |
1519 | return result; | |
1520 | ||
1521 | if (strcmp("SMBS", path.pointer)) { | |
1522 | result = -ENODEV; | |
1523 | goto out; | |
1524 | } | |
1525 | ||
1526 | /* Does it have the necessary (but misnamed) methods? */ | |
1527 | result = -ENODEV; | |
d4e1a692 TK |
1528 | if (ACPI_SUCCESS(acpi_get_handle(handle, "SBI", &h_dummy)) && |
1529 | ACPI_SUCCESS(acpi_get_handle(handle, "SBR", &h_dummy)) && | |
1530 | ACPI_SUCCESS(acpi_get_handle(handle, "SBW", &h_dummy))) | |
222e82ac DW |
1531 | result = 0; |
1532 | out: | |
1533 | kfree(path.pointer); | |
1534 | return result; | |
1535 | } | |
1536 | ||
c0af4175 TK |
1537 | static void acpi_set_pnp_ids(acpi_handle handle, struct acpi_device_pnp *pnp, |
1538 | int device_type) | |
1da177e4 | 1539 | { |
4be44fcd | 1540 | acpi_status status; |
57f3674f | 1541 | struct acpi_device_info *info; |
78e25fef | 1542 | struct acpi_pnp_device_id_list *cid_list; |
7f47fa6c | 1543 | int i; |
1da177e4 | 1544 | |
c0af4175 | 1545 | switch (device_type) { |
1da177e4 | 1546 | case ACPI_BUS_TYPE_DEVICE: |
c0af4175 TK |
1547 | if (handle == ACPI_ROOT_OBJECT) { |
1548 | acpi_add_id(pnp, ACPI_SYSTEM_HID); | |
859ac9a4 BH |
1549 | break; |
1550 | } | |
1551 | ||
c0af4175 | 1552 | status = acpi_get_object_info(handle, &info); |
1da177e4 | 1553 | if (ACPI_FAILURE(status)) { |
c0af4175 TK |
1554 | pr_err(PREFIX "%s: Error reading device info\n", |
1555 | __func__); | |
1da177e4 LT |
1556 | return; |
1557 | } | |
1558 | ||
1da177e4 | 1559 | if (info->valid & ACPI_VALID_HID) |
c0af4175 | 1560 | acpi_add_id(pnp, info->hardware_id.string); |
57f3674f | 1561 | if (info->valid & ACPI_VALID_CID) { |
15b8dd53 | 1562 | cid_list = &info->compatible_id_list; |
57f3674f | 1563 | for (i = 0; i < cid_list->count; i++) |
c0af4175 | 1564 | acpi_add_id(pnp, cid_list->ids[i].string); |
57f3674f | 1565 | } |
1da177e4 | 1566 | if (info->valid & ACPI_VALID_ADR) { |
c0af4175 TK |
1567 | pnp->bus_address = info->address; |
1568 | pnp->type.bus_address = 1; | |
1da177e4 | 1569 | } |
ccf78040 | 1570 | if (info->valid & ACPI_VALID_UID) |
c0af4175 | 1571 | pnp->unique_id = kstrdup(info->unique_id.string, |
ccf78040 | 1572 | GFP_KERNEL); |
ae843332 | 1573 | |
a83893ae BH |
1574 | kfree(info); |
1575 | ||
57f3674f BH |
1576 | /* |
1577 | * Some devices don't reliably have _HIDs & _CIDs, so add | |
1578 | * synthetic HIDs to make sure drivers can find them. | |
1579 | */ | |
c0af4175 TK |
1580 | if (acpi_is_video_device(handle)) |
1581 | acpi_add_id(pnp, ACPI_VIDEO_HID); | |
1582 | else if (ACPI_SUCCESS(acpi_bay_match(handle))) | |
1583 | acpi_add_id(pnp, ACPI_BAY_HID); | |
1584 | else if (ACPI_SUCCESS(acpi_dock_match(handle))) | |
1585 | acpi_add_id(pnp, ACPI_DOCK_HID); | |
1586 | else if (!acpi_ibm_smbus_match(handle)) | |
1587 | acpi_add_id(pnp, ACPI_SMBUS_IBM_HID); | |
1588 | else if (list_empty(&pnp->ids) && handle == ACPI_ROOT_OBJECT) { | |
1589 | acpi_add_id(pnp, ACPI_BUS_HID); /* \_SB, LNXSYBUS */ | |
1590 | strcpy(pnp->device_name, ACPI_BUS_DEVICE_NAME); | |
1591 | strcpy(pnp->device_class, ACPI_BUS_CLASS); | |
b7b30de5 | 1592 | } |
54735266 | 1593 | |
1da177e4 LT |
1594 | break; |
1595 | case ACPI_BUS_TYPE_POWER: | |
c0af4175 | 1596 | acpi_add_id(pnp, ACPI_POWER_HID); |
1da177e4 LT |
1597 | break; |
1598 | case ACPI_BUS_TYPE_PROCESSOR: | |
c0af4175 | 1599 | acpi_add_id(pnp, ACPI_PROCESSOR_OBJECT_HID); |
1da177e4 | 1600 | break; |
1da177e4 | 1601 | case ACPI_BUS_TYPE_THERMAL: |
c0af4175 | 1602 | acpi_add_id(pnp, ACPI_THERMAL_HID); |
1da177e4 LT |
1603 | break; |
1604 | case ACPI_BUS_TYPE_POWER_BUTTON: | |
c0af4175 | 1605 | acpi_add_id(pnp, ACPI_BUTTON_HID_POWERF); |
1da177e4 LT |
1606 | break; |
1607 | case ACPI_BUS_TYPE_SLEEP_BUTTON: | |
c0af4175 | 1608 | acpi_add_id(pnp, ACPI_BUTTON_HID_SLEEPF); |
1da177e4 LT |
1609 | break; |
1610 | } | |
1da177e4 LT |
1611 | } |
1612 | ||
c0af4175 TK |
1613 | void acpi_free_pnp_ids(struct acpi_device_pnp *pnp) |
1614 | { | |
1615 | struct acpi_hardware_id *id, *tmp; | |
1616 | ||
1617 | list_for_each_entry_safe(id, tmp, &pnp->ids, list) { | |
1618 | kfree(id->id); | |
1619 | kfree(id); | |
1620 | } | |
1621 | kfree(pnp->unique_id); | |
1622 | } | |
1623 | ||
82c7d5ef RW |
1624 | void acpi_init_device_object(struct acpi_device *device, acpi_handle handle, |
1625 | int type, unsigned long long sta) | |
1da177e4 | 1626 | { |
d43e167d RW |
1627 | INIT_LIST_HEAD(&device->pnp.ids); |
1628 | device->device_type = type; | |
1629 | device->handle = handle; | |
1630 | device->parent = acpi_bus_get_parent(handle); | |
1631 | STRUCT_TO_INT(device->status) = sta; | |
1632 | acpi_device_get_busid(device); | |
c0af4175 | 1633 | acpi_set_pnp_ids(handle, &device->pnp, type); |
d43e167d | 1634 | acpi_bus_get_flags(device); |
2c0d4fe0 | 1635 | device->flags.match_driver = false; |
cf860be6 RW |
1636 | device_initialize(&device->dev); |
1637 | dev_set_uevent_suppress(&device->dev, true); | |
1638 | } | |
bc3b0772 | 1639 | |
cf860be6 RW |
1640 | void acpi_device_add_finalize(struct acpi_device *device) |
1641 | { | |
2c0d4fe0 | 1642 | device->flags.match_driver = true; |
cf860be6 RW |
1643 | dev_set_uevent_suppress(&device->dev, false); |
1644 | kobject_uevent(&device->dev.kobj, KOBJ_ADD); | |
1da177e4 LT |
1645 | } |
1646 | ||
5c478f49 BH |
1647 | static int acpi_add_single_object(struct acpi_device **child, |
1648 | acpi_handle handle, int type, | |
2c0d4fe0 | 1649 | unsigned long long sta) |
1da177e4 | 1650 | { |
77c24888 BH |
1651 | int result; |
1652 | struct acpi_device *device; | |
29aaefa6 | 1653 | struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; |
1da177e4 | 1654 | |
36bcbec7 | 1655 | device = kzalloc(sizeof(struct acpi_device), GFP_KERNEL); |
1da177e4 | 1656 | if (!device) { |
6468463a | 1657 | printk(KERN_ERR PREFIX "Memory allocation error\n"); |
d550d98d | 1658 | return -ENOMEM; |
1da177e4 | 1659 | } |
1da177e4 | 1660 | |
d43e167d RW |
1661 | acpi_init_device_object(device, handle, type, sta); |
1662 | acpi_bus_get_power_flags(device); | |
d57d09a4 | 1663 | acpi_bus_get_wakeup_device_flags(device); |
1da177e4 | 1664 | |
cf860be6 | 1665 | result = acpi_device_add(device, acpi_device_release); |
d43e167d | 1666 | if (result) { |
718fb0de | 1667 | acpi_device_release(&device->dev); |
d43e167d RW |
1668 | return result; |
1669 | } | |
1da177e4 | 1670 | |
d43e167d | 1671 | acpi_power_add_remove_device(device, true); |
cf860be6 | 1672 | acpi_device_add_finalize(device); |
d43e167d RW |
1673 | acpi_get_name(handle, ACPI_FULL_PATHNAME, &buffer); |
1674 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Added %s [%s] parent %s\n", | |
1675 | dev_name(&device->dev), (char *) buffer.pointer, | |
1676 | device->parent ? dev_name(&device->parent->dev) : "(null)")); | |
1677 | kfree(buffer.pointer); | |
1678 | *child = device; | |
1679 | return 0; | |
bf325f95 RW |
1680 | } |
1681 | ||
778cbc1d BH |
1682 | static int acpi_bus_type_and_status(acpi_handle handle, int *type, |
1683 | unsigned long long *sta) | |
1da177e4 | 1684 | { |
778cbc1d BH |
1685 | acpi_status status; |
1686 | acpi_object_type acpi_type; | |
1da177e4 | 1687 | |
778cbc1d | 1688 | status = acpi_get_type(handle, &acpi_type); |
51a85faf | 1689 | if (ACPI_FAILURE(status)) |
778cbc1d | 1690 | return -ENODEV; |
4be44fcd | 1691 | |
778cbc1d | 1692 | switch (acpi_type) { |
51a85faf BH |
1693 | case ACPI_TYPE_ANY: /* for ACPI_ROOT_OBJECT */ |
1694 | case ACPI_TYPE_DEVICE: | |
778cbc1d BH |
1695 | *type = ACPI_BUS_TYPE_DEVICE; |
1696 | status = acpi_bus_get_status_handle(handle, sta); | |
1697 | if (ACPI_FAILURE(status)) | |
1698 | return -ENODEV; | |
51a85faf BH |
1699 | break; |
1700 | case ACPI_TYPE_PROCESSOR: | |
778cbc1d BH |
1701 | *type = ACPI_BUS_TYPE_PROCESSOR; |
1702 | status = acpi_bus_get_status_handle(handle, sta); | |
1703 | if (ACPI_FAILURE(status)) | |
1704 | return -ENODEV; | |
51a85faf BH |
1705 | break; |
1706 | case ACPI_TYPE_THERMAL: | |
778cbc1d BH |
1707 | *type = ACPI_BUS_TYPE_THERMAL; |
1708 | *sta = ACPI_STA_DEFAULT; | |
51a85faf BH |
1709 | break; |
1710 | case ACPI_TYPE_POWER: | |
778cbc1d BH |
1711 | *type = ACPI_BUS_TYPE_POWER; |
1712 | *sta = ACPI_STA_DEFAULT; | |
51a85faf BH |
1713 | break; |
1714 | default: | |
778cbc1d | 1715 | return -ENODEV; |
51a85faf | 1716 | } |
1da177e4 | 1717 | |
778cbc1d BH |
1718 | return 0; |
1719 | } | |
1720 | ||
4b59cc1f RW |
1721 | static bool acpi_scan_handler_matching(struct acpi_scan_handler *handler, |
1722 | char *idstr, | |
1723 | const struct acpi_device_id **matchid) | |
1724 | { | |
1725 | const struct acpi_device_id *devid; | |
1726 | ||
1727 | for (devid = handler->ids; devid->id[0]; devid++) | |
1728 | if (!strcmp((char *)devid->id, idstr)) { | |
1729 | if (matchid) | |
1730 | *matchid = devid; | |
1731 | ||
1732 | return true; | |
1733 | } | |
1734 | ||
1735 | return false; | |
1736 | } | |
1737 | ||
6b772e8f TK |
1738 | static struct acpi_scan_handler *acpi_scan_match_handler(char *idstr, |
1739 | const struct acpi_device_id **matchid) | |
1740 | { | |
1741 | struct acpi_scan_handler *handler; | |
1742 | ||
1743 | list_for_each_entry(handler, &acpi_scan_handlers_list, list_node) | |
1744 | if (acpi_scan_handler_matching(handler, idstr, matchid)) | |
1745 | return handler; | |
1746 | ||
1747 | return NULL; | |
1748 | } | |
1749 | ||
3f8055c3 RW |
1750 | void acpi_scan_hotplug_enabled(struct acpi_hotplug_profile *hotplug, bool val) |
1751 | { | |
3f8055c3 RW |
1752 | if (!!hotplug->enabled == !!val) |
1753 | return; | |
1754 | ||
1755 | mutex_lock(&acpi_scan_lock); | |
1756 | ||
1757 | hotplug->enabled = val; | |
3f8055c3 RW |
1758 | |
1759 | mutex_unlock(&acpi_scan_lock); | |
1760 | } | |
1761 | ||
6b772e8f | 1762 | static void acpi_scan_init_hotplug(acpi_handle handle, int type) |
a33ec399 | 1763 | { |
6b772e8f TK |
1764 | struct acpi_device_pnp pnp = {}; |
1765 | struct acpi_hardware_id *hwid; | |
a33ec399 RW |
1766 | struct acpi_scan_handler *handler; |
1767 | ||
6b772e8f TK |
1768 | INIT_LIST_HEAD(&pnp.ids); |
1769 | acpi_set_pnp_ids(handle, &pnp, type); | |
a33ec399 | 1770 | |
6b772e8f | 1771 | if (!pnp.type.hardware_id) |
a33ec399 | 1772 | return; |
a33ec399 RW |
1773 | |
1774 | /* | |
1775 | * This relies on the fact that acpi_install_notify_handler() will not | |
1776 | * install the same notify handler routine twice for the same handle. | |
1777 | */ | |
6b772e8f TK |
1778 | list_for_each_entry(hwid, &pnp.ids, list) { |
1779 | handler = acpi_scan_match_handler(hwid->id, NULL); | |
1780 | if (handler) { | |
2cbb14fb TK |
1781 | acpi_install_notify_handler(handle, ACPI_SYSTEM_NOTIFY, |
1782 | acpi_hotplug_notify_cb, handler); | |
6b772e8f TK |
1783 | break; |
1784 | } | |
1785 | } | |
1786 | ||
1787 | acpi_free_pnp_ids(&pnp); | |
a33ec399 RW |
1788 | } |
1789 | ||
e3863094 RW |
1790 | static acpi_status acpi_bus_check_add(acpi_handle handle, u32 lvl_not_used, |
1791 | void *not_used, void **return_value) | |
778cbc1d | 1792 | { |
805d410f | 1793 | struct acpi_device *device = NULL; |
778cbc1d BH |
1794 | int type; |
1795 | unsigned long long sta; | |
e3b87f8a | 1796 | acpi_status status; |
778cbc1d BH |
1797 | int result; |
1798 | ||
4002bf38 RW |
1799 | acpi_bus_get_device(handle, &device); |
1800 | if (device) | |
1801 | goto out; | |
1802 | ||
778cbc1d BH |
1803 | result = acpi_bus_type_and_status(handle, &type, &sta); |
1804 | if (result) | |
1805 | return AE_OK; | |
1806 | ||
82c7d5ef RW |
1807 | if (type == ACPI_BUS_TYPE_POWER) { |
1808 | acpi_add_power_resource(handle); | |
1809 | return AE_OK; | |
1810 | } | |
1811 | ||
6b772e8f | 1812 | acpi_scan_init_hotplug(handle, type); |
a33ec399 | 1813 | |
778cbc1d | 1814 | if (!(sta & ACPI_STA_DEVICE_PRESENT) && |
b581a7f9 | 1815 | !(sta & ACPI_STA_DEVICE_FUNCTIONING)) { |
86e4e20e RW |
1816 | struct acpi_device_wakeup wakeup; |
1817 | acpi_handle temp; | |
1818 | ||
1819 | status = acpi_get_handle(handle, "_PRW", &temp); | |
993cbe59 | 1820 | if (ACPI_SUCCESS(status)) { |
86e4e20e RW |
1821 | acpi_bus_extract_wakeup_device_power_package(handle, |
1822 | &wakeup); | |
993cbe59 RW |
1823 | acpi_power_resources_list_free(&wakeup.resources); |
1824 | } | |
778cbc1d | 1825 | return AE_CTRL_DEPTH; |
b581a7f9 | 1826 | } |
778cbc1d | 1827 | |
2c0d4fe0 | 1828 | acpi_add_single_object(&device, handle, type, sta); |
e3b87f8a | 1829 | if (!device) |
51a85faf | 1830 | return AE_CTRL_DEPTH; |
1da177e4 | 1831 | |
4002bf38 | 1832 | out: |
51a85faf BH |
1833 | if (!*return_value) |
1834 | *return_value = device; | |
805d410f | 1835 | |
51a85faf BH |
1836 | return AE_OK; |
1837 | } | |
3fb02738 | 1838 | |
c5698074 | 1839 | static int acpi_scan_attach_handler(struct acpi_device *device) |
ca589f94 | 1840 | { |
c5698074 RW |
1841 | struct acpi_hardware_id *hwid; |
1842 | int ret = 0; | |
ca589f94 | 1843 | |
c5698074 | 1844 | list_for_each_entry(hwid, &device->pnp.ids, list) { |
87b85b3c | 1845 | const struct acpi_device_id *devid; |
c5698074 | 1846 | struct acpi_scan_handler *handler; |
ca589f94 | 1847 | |
c5698074 RW |
1848 | handler = acpi_scan_match_handler(hwid->id, &devid); |
1849 | if (handler) { | |
87b85b3c RW |
1850 | ret = handler->attach(device, devid); |
1851 | if (ret > 0) { | |
1852 | device->handler = handler; | |
c5698074 | 1853 | break; |
87b85b3c | 1854 | } else if (ret < 0) { |
c5698074 | 1855 | break; |
87b85b3c | 1856 | } |
ca589f94 RW |
1857 | } |
1858 | } | |
1859 | return ret; | |
1860 | } | |
1861 | ||
0fc300b0 RW |
1862 | static acpi_status acpi_bus_device_attach(acpi_handle handle, u32 lvl_not_used, |
1863 | void *not_used, void **ret_not_used) | |
51a85faf | 1864 | { |
805d410f RW |
1865 | struct acpi_device *device; |
1866 | unsigned long long sta_not_used; | |
ca589f94 | 1867 | int ret; |
3fb02738 | 1868 | |
805d410f RW |
1869 | /* |
1870 | * Ignore errors ignored by acpi_bus_check_add() to avoid terminating | |
1871 | * namespace walks prematurely. | |
1872 | */ | |
ca589f94 | 1873 | if (acpi_bus_type_and_status(handle, &ret, &sta_not_used)) |
805d410f | 1874 | return AE_OK; |
1da177e4 | 1875 | |
805d410f RW |
1876 | if (acpi_bus_get_device(handle, &device)) |
1877 | return AE_CTRL_DEPTH; | |
7779688f | 1878 | |
ca589f94 RW |
1879 | ret = acpi_scan_attach_handler(device); |
1880 | if (ret) | |
1881 | return ret > 0 ? AE_OK : AE_CTRL_DEPTH; | |
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 | ||
05404d8f | 1928 | device->removal_type = ACPI_BUS_REMOVAL_EJECT; |
ca589f94 RW |
1929 | if (dev_handler) { |
1930 | if (dev_handler->detach) | |
1931 | dev_handler->detach(device); | |
1932 | ||
1933 | device->handler = NULL; | |
1934 | } else { | |
1935 | device_release_driver(&device->dev); | |
1936 | } | |
05404d8f RW |
1937 | } |
1938 | return AE_OK; | |
3fb02738 | 1939 | } |
1da177e4 | 1940 | |
05404d8f RW |
1941 | static acpi_status acpi_bus_remove(acpi_handle handle, u32 lvl_not_used, |
1942 | void *not_used, void **ret_not_used) | |
1da177e4 | 1943 | { |
05404d8f | 1944 | struct acpi_device *device = NULL; |
4be44fcd | 1945 | |
05404d8f RW |
1946 | if (!acpi_bus_get_device(handle, &device)) |
1947 | acpi_device_unregister(device); | |
1da177e4 | 1948 | |
05404d8f RW |
1949 | return AE_OK; |
1950 | } | |
1da177e4 | 1951 | |
3757b948 RW |
1952 | /** |
1953 | * acpi_bus_trim - Remove ACPI device node and all of its descendants | |
1954 | * @start: Root of the ACPI device nodes subtree to remove. | |
1955 | * | |
1956 | * Must be called under acpi_scan_lock. | |
1957 | */ | |
bfee26db | 1958 | void acpi_bus_trim(struct acpi_device *start) |
1da177e4 | 1959 | { |
05404d8f RW |
1960 | /* |
1961 | * Execute acpi_bus_device_detach() as a post-order callback to detach | |
1962 | * all ACPI drivers from the device nodes being removed. | |
1963 | */ | |
1964 | acpi_walk_namespace(ACPI_TYPE_ANY, start->handle, ACPI_UINT32_MAX, NULL, | |
1965 | acpi_bus_device_detach, NULL, NULL); | |
1966 | acpi_bus_device_detach(start->handle, 0, NULL, NULL); | |
cecdb193 RW |
1967 | /* |
1968 | * Execute acpi_bus_remove() as a post-order callback to remove device | |
1969 | * nodes in the given namespace scope. | |
1970 | */ | |
1971 | acpi_walk_namespace(ACPI_TYPE_ANY, start->handle, ACPI_UINT32_MAX, NULL, | |
1972 | acpi_bus_remove, NULL, NULL); | |
1973 | acpi_bus_remove(start->handle, 0, NULL, NULL); | |
1da177e4 | 1974 | } |
ceaba663 KA |
1975 | EXPORT_SYMBOL_GPL(acpi_bus_trim); |
1976 | ||
e8b945c9 | 1977 | static int acpi_bus_scan_fixed(void) |
1da177e4 | 1978 | { |
4be44fcd | 1979 | int result = 0; |
c4168bff | 1980 | |
1da177e4 LT |
1981 | /* |
1982 | * Enumerate all fixed-feature devices. | |
1983 | */ | |
2c0d4fe0 RW |
1984 | if (!(acpi_gbl_FADT.flags & ACPI_FADT_POWER_BUTTON)) { |
1985 | struct acpi_device *device = NULL; | |
1986 | ||
5c478f49 | 1987 | result = acpi_add_single_object(&device, NULL, |
c4168bff | 1988 | ACPI_BUS_TYPE_POWER_BUTTON, |
2c0d4fe0 RW |
1989 | ACPI_STA_DEFAULT); |
1990 | if (result) | |
1991 | return result; | |
1992 | ||
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 | ||
2009 | result = device_attach(&device->dev); | |
3fb02738 | 2010 | } |
1da177e4 | 2011 | |
2c0d4fe0 | 2012 | return result < 0 ? result : 0; |
1da177e4 LT |
2013 | } |
2014 | ||
e747f274 | 2015 | int __init acpi_scan_init(void) |
1da177e4 LT |
2016 | { |
2017 | int result; | |
1da177e4 | 2018 | |
5b327265 PM |
2019 | result = bus_register(&acpi_bus_type); |
2020 | if (result) { | |
2021 | /* We don't want to quit even if we failed to add suspend/resume */ | |
2022 | printk(KERN_ERR PREFIX "Could not register bus type\n"); | |
2023 | } | |
2024 | ||
92ef2a25 | 2025 | acpi_pci_root_init(); |
4daeaf68 | 2026 | acpi_pci_link_init(); |
141a297b | 2027 | acpi_platform_init(); |
13176bbf | 2028 | acpi_csrt_init(); |
737f1a9f | 2029 | acpi_container_init(); |
ab1a2e03 | 2030 | acpi_pci_slot_init(); |
0a347644 | 2031 | acpi_memory_hotplug_init(); |
97d9a9e9 | 2032 | |
3757b948 | 2033 | mutex_lock(&acpi_scan_lock); |
1da177e4 LT |
2034 | /* |
2035 | * Enumerate devices in the ACPI namespace. | |
2036 | */ | |
0cd6ac52 RW |
2037 | result = acpi_bus_scan(ACPI_ROOT_OBJECT); |
2038 | if (result) | |
3757b948 | 2039 | goto out; |
1da177e4 | 2040 | |
0cd6ac52 | 2041 | result = acpi_bus_get_device(ACPI_ROOT_OBJECT, &acpi_root); |
1da177e4 | 2042 | if (result) |
3757b948 | 2043 | goto out; |
1da177e4 | 2044 | |
b8bd759a RW |
2045 | result = acpi_bus_scan_fixed(); |
2046 | if (result) { | |
b17b537a | 2047 | acpi_device_unregister(acpi_root); |
3757b948 | 2048 | goto out; |
b8bd759a | 2049 | } |
1da177e4 | 2050 | |
b8bd759a | 2051 | acpi_update_all_gpes(); |
3757b948 | 2052 | |
668192b6 YL |
2053 | acpi_pci_root_hp_init(); |
2054 | ||
3757b948 RW |
2055 | out: |
2056 | mutex_unlock(&acpi_scan_lock); | |
2057 | return result; | |
1da177e4 | 2058 | } |